Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * IPv6 Address [auto]configuration | |
3 | * Linux INET6 implementation | |
4 | * | |
5 | * Authors: | |
1ab1457c | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
1da177e4 LT |
7 | * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> |
8 | * | |
1da177e4 LT |
9 | * This program is free software; you can redistribute it and/or |
10 | * modify it under the terms of the GNU General Public License | |
11 | * as published by the Free Software Foundation; either version | |
12 | * 2 of the License, or (at your option) any later version. | |
13 | */ | |
14 | ||
15 | /* | |
16 | * Changes: | |
17 | * | |
18 | * Janos Farkas : delete timer on ifdown | |
19 | * <chexum@bankinf.banki.hu> | |
20 | * Andi Kleen : kill double kfree on module | |
21 | * unload. | |
22 | * Maciej W. Rozycki : FDDI support | |
23 | * sekiya@USAGI : Don't send too many RS | |
24 | * packets. | |
25 | * yoshfuji@USAGI : Fixed interval between DAD | |
26 | * packets. | |
27 | * YOSHIFUJI Hideaki @USAGI : improved accuracy of | |
28 | * address validation timer. | |
29 | * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041) | |
30 | * support. | |
31 | * Yuji SEKIYA @USAGI : Don't assign a same IPv6 | |
32 | * address on a same interface. | |
33 | * YOSHIFUJI Hideaki @USAGI : ARCnet support | |
34 | * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to | |
35 | * seq_file. | |
b1cacb68 YH |
36 | * YOSHIFUJI Hideaki @USAGI : improved source address |
37 | * selection; consider scope, | |
38 | * status etc. | |
1da177e4 LT |
39 | */ |
40 | ||
f3213831 JP |
41 | #define pr_fmt(fmt) "IPv6: " fmt |
42 | ||
1da177e4 LT |
43 | #include <linux/errno.h> |
44 | #include <linux/types.h> | |
a0bffffc | 45 | #include <linux/kernel.h> |
1da177e4 LT |
46 | #include <linux/socket.h> |
47 | #include <linux/sockios.h> | |
1da177e4 LT |
48 | #include <linux/net.h> |
49 | #include <linux/in6.h> | |
50 | #include <linux/netdevice.h> | |
1823730f | 51 | #include <linux/if_addr.h> |
1da177e4 LT |
52 | #include <linux/if_arp.h> |
53 | #include <linux/if_arcnet.h> | |
54 | #include <linux/if_infiniband.h> | |
55 | #include <linux/route.h> | |
56 | #include <linux/inetdevice.h> | |
57 | #include <linux/init.h> | |
5a0e3ad6 | 58 | #include <linux/slab.h> |
1da177e4 LT |
59 | #ifdef CONFIG_SYSCTL |
60 | #include <linux/sysctl.h> | |
61 | #endif | |
4fc268d2 | 62 | #include <linux/capability.h> |
1da177e4 LT |
63 | #include <linux/delay.h> |
64 | #include <linux/notifier.h> | |
543537bd | 65 | #include <linux/string.h> |
ddbe5032 | 66 | #include <linux/hash.h> |
1da177e4 | 67 | |
457c4cbc | 68 | #include <net/net_namespace.h> |
1da177e4 LT |
69 | #include <net/sock.h> |
70 | #include <net/snmp.h> | |
71 | ||
06a4c1c5 | 72 | #include <net/af_ieee802154.h> |
cb6bf355 | 73 | #include <net/firewire.h> |
1da177e4 LT |
74 | #include <net/ipv6.h> |
75 | #include <net/protocol.h> | |
76 | #include <net/ndisc.h> | |
77 | #include <net/ip6_route.h> | |
78 | #include <net/addrconf.h> | |
79 | #include <net/tcp.h> | |
80 | #include <net/ip.h> | |
5d620266 | 81 | #include <net/netlink.h> |
f24e3d65 | 82 | #include <net/pkt_sched.h> |
1da177e4 LT |
83 | #include <linux/if_tunnel.h> |
84 | #include <linux/rtnetlink.h> | |
f3a1bfb1 | 85 | #include <linux/netconf.h> |
1da177e4 LT |
86 | |
87 | #ifdef CONFIG_IPV6_PRIVACY | |
88 | #include <linux/random.h> | |
1da177e4 LT |
89 | #endif |
90 | ||
e21e8467 | 91 | #include <linux/uaccess.h> |
7f7d9a6b | 92 | #include <asm/unaligned.h> |
1da177e4 LT |
93 | |
94 | #include <linux/proc_fs.h> | |
95 | #include <linux/seq_file.h> | |
bc3b2d7f | 96 | #include <linux/export.h> |
1da177e4 LT |
97 | |
98 | /* Set to 3 to get tracing... */ | |
99 | #define ACONF_DEBUG 2 | |
100 | ||
101 | #if ACONF_DEBUG >= 3 | |
102 | #define ADBG(x) printk x | |
103 | #else | |
104 | #define ADBG(x) | |
105 | #endif | |
106 | ||
107 | #define INFINITY_LIFE_TIME 0xFFFFFFFF | |
18a31e1e TG |
108 | |
109 | static inline u32 cstamp_delta(unsigned long cstamp) | |
110 | { | |
111 | return (cstamp - INITIAL_JIFFIES) * 100UL / HZ; | |
112 | } | |
1da177e4 LT |
113 | |
114 | #ifdef CONFIG_SYSCTL | |
f52295a9 | 115 | static void addrconf_sysctl_register(struct inet6_dev *idev); |
408c4768 PE |
116 | static void addrconf_sysctl_unregister(struct inet6_dev *idev); |
117 | #else | |
118 | static inline void addrconf_sysctl_register(struct inet6_dev *idev) | |
119 | { | |
120 | } | |
121 | ||
122 | static inline void addrconf_sysctl_unregister(struct inet6_dev *idev) | |
123 | { | |
124 | } | |
1da177e4 LT |
125 | #endif |
126 | ||
127 | #ifdef CONFIG_IPV6_PRIVACY | |
eb7e0575 SD |
128 | static void __ipv6_regen_rndid(struct inet6_dev *idev); |
129 | static void __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr); | |
1da177e4 | 130 | static void ipv6_regen_rndid(unsigned long data); |
1da177e4 LT |
131 | #endif |
132 | ||
1b34be74 | 133 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev); |
1da177e4 LT |
134 | static int ipv6_count_addresses(struct inet6_dev *idev); |
135 | ||
136 | /* | |
137 | * Configured unicast address hash table | |
138 | */ | |
c2e21293 | 139 | static struct hlist_head inet6_addr_lst[IN6_ADDR_HSIZE]; |
5c578aed | 140 | static DEFINE_SPINLOCK(addrconf_hash_lock); |
1da177e4 | 141 | |
835b474b HFS |
142 | static void addrconf_verify(void); |
143 | static void addrconf_verify_rtnl(void); | |
144 | static void addrconf_verify_work(struct work_struct *); | |
1da177e4 | 145 | |
835b474b HFS |
146 | static struct workqueue_struct *addrconf_wq; |
147 | static DECLARE_DELAYED_WORK(addr_chk_work, addrconf_verify_work); | |
1da177e4 LT |
148 | |
149 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp); | |
150 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp); | |
151 | ||
93d9b7d7 JP |
152 | static void addrconf_type_change(struct net_device *dev, |
153 | unsigned long event); | |
1da177e4 LT |
154 | static int addrconf_ifdown(struct net_device *dev, int how); |
155 | ||
21caa662 RK |
156 | static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx, |
157 | int plen, | |
158 | const struct net_device *dev, | |
159 | u32 flags, u32 noflags); | |
160 | ||
cf22f9a2 | 161 | static void addrconf_dad_start(struct inet6_ifaddr *ifp); |
835b474b | 162 | static void addrconf_dad_work(struct work_struct *w); |
1da177e4 | 163 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp); |
c5e33bdd | 164 | static void addrconf_dad_run(struct inet6_dev *idev); |
1da177e4 LT |
165 | static void addrconf_rs_timer(unsigned long data); |
166 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
167 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
168 | ||
1ab1457c | 169 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 | 170 | struct prefix_info *pinfo); |
3e81c6da DM |
171 | static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
172 | struct net_device *dev); | |
1da177e4 | 173 | |
888c848e | 174 | static struct ipv6_devconf ipv6_devconf __read_mostly = { |
1da177e4 LT |
175 | .forwarding = 0, |
176 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
177 | .mtu6 = IPV6_MIN_MTU, | |
6fa3eb70 | 178 | .accept_ra = 1, |
1da177e4 LT |
179 | .accept_redirects = 1, |
180 | .autoconf = 1, | |
181 | .force_mld_version = 0, | |
182 | .dad_transmits = 1, | |
183 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
184 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
185 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
186 | #ifdef CONFIG_IPV6_PRIVACY | |
6fa3eb70 | 187 | .use_tempaddr = 1, |
1da177e4 LT |
188 | .temp_valid_lft = TEMP_VALID_LIFETIME, |
189 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
190 | .regen_max_retry = REGEN_MAX_RETRY, | |
191 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
192 | #endif | |
193 | .max_addresses = IPV6_MAX_ADDRESSES, | |
65f5c7c1 | 194 | .accept_ra_defrtr = 1, |
c4fd30eb | 195 | .accept_ra_pinfo = 1, |
6fa3eb70 S |
196 | #ifdef CONFIG_MTK_DHCPV6C_WIFI |
197 | .ra_info_flag = 0, | |
198 | #endif | |
930d6ff2 YH |
199 | #ifdef CONFIG_IPV6_ROUTER_PREF |
200 | .accept_ra_rtr_pref = 1, | |
52e16356 | 201 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
202 | #ifdef CONFIG_IPV6_ROUTE_INFO |
203 | .accept_ra_rt_info_max_plen = 0, | |
204 | #endif | |
930d6ff2 | 205 | #endif |
6fa3eb70 | 206 | .accept_ra_rt_table = 0, |
fbea49e1 | 207 | .proxy_ndp = 0, |
0bcbc926 | 208 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
778d80be | 209 | .disable_ipv6 = 0, |
1b34be74 | 210 | .accept_dad = 1, |
1da177e4 LT |
211 | }; |
212 | ||
ab32ea5d | 213 | static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = { |
1da177e4 LT |
214 | .forwarding = 0, |
215 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
216 | .mtu6 = IPV6_MIN_MTU, | |
217 | .accept_ra = 1, | |
218 | .accept_redirects = 1, | |
219 | .autoconf = 1, | |
220 | .dad_transmits = 1, | |
221 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
222 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
223 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
224 | #ifdef CONFIG_IPV6_PRIVACY | |
6fa3eb70 | 225 | .use_tempaddr = 1, |
1da177e4 LT |
226 | .temp_valid_lft = TEMP_VALID_LIFETIME, |
227 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
228 | .regen_max_retry = REGEN_MAX_RETRY, | |
229 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
230 | #endif | |
231 | .max_addresses = IPV6_MAX_ADDRESSES, | |
65f5c7c1 | 232 | .accept_ra_defrtr = 1, |
c4fd30eb | 233 | .accept_ra_pinfo = 1, |
6fa3eb70 S |
234 | #ifdef CONFIG_MTK_DHCPV6C_WIFI |
235 | .ra_info_flag = 0, | |
236 | #endif | |
930d6ff2 YH |
237 | #ifdef CONFIG_IPV6_ROUTER_PREF |
238 | .accept_ra_rtr_pref = 1, | |
52e16356 | 239 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
240 | #ifdef CONFIG_IPV6_ROUTE_INFO |
241 | .accept_ra_rt_info_max_plen = 0, | |
242 | #endif | |
930d6ff2 | 243 | #endif |
6fa3eb70 | 244 | .accept_ra_rt_table = 0, |
fbea49e1 | 245 | .proxy_ndp = 0, |
0bcbc926 | 246 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
778d80be | 247 | .disable_ipv6 = 0, |
1b34be74 | 248 | .accept_dad = 1, |
1da177e4 LT |
249 | }; |
250 | ||
251 | /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */ | |
1da177e4 | 252 | const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; |
1da177e4 | 253 | const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; |
f3ee4010 YH |
254 | const struct in6_addr in6addr_linklocal_allnodes = IN6ADDR_LINKLOCAL_ALLNODES_INIT; |
255 | const struct in6_addr in6addr_linklocal_allrouters = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT; | |
2c5e8933 HFS |
256 | const struct in6_addr in6addr_interfacelocal_allnodes = IN6ADDR_INTERFACELOCAL_ALLNODES_INIT; |
257 | const struct in6_addr in6addr_interfacelocal_allrouters = IN6ADDR_INTERFACELOCAL_ALLROUTERS_INIT; | |
258 | const struct in6_addr in6addr_sitelocal_allrouters = IN6ADDR_SITELOCAL_ALLROUTERS_INIT; | |
1da177e4 | 259 | |
f24e3d65 | 260 | /* Check if a valid qdisc is available */ |
05297949 | 261 | static inline bool addrconf_qdisc_ok(const struct net_device *dev) |
f24e3d65 | 262 | { |
05297949 | 263 | return !qdisc_tx_is_noop(dev); |
f24e3d65 MC |
264 | } |
265 | ||
973d5956 | 266 | static void addrconf_del_rs_timer(struct inet6_dev *idev) |
1da177e4 | 267 | { |
973d5956 HFS |
268 | if (del_timer(&idev->rs_timer)) |
269 | __in6_dev_put(idev); | |
270 | } | |
271 | ||
835b474b | 272 | static void addrconf_del_dad_work(struct inet6_ifaddr *ifp) |
973d5956 | 273 | { |
835b474b | 274 | if (cancel_delayed_work(&ifp->dad_work)) |
1da177e4 LT |
275 | __in6_ifa_put(ifp); |
276 | } | |
277 | ||
973d5956 HFS |
278 | static void addrconf_mod_rs_timer(struct inet6_dev *idev, |
279 | unsigned long when) | |
280 | { | |
281 | if (!timer_pending(&idev->rs_timer)) | |
282 | in6_dev_hold(idev); | |
283 | mod_timer(&idev->rs_timer, jiffies + when); | |
284 | } | |
1da177e4 | 285 | |
835b474b HFS |
286 | static void addrconf_mod_dad_work(struct inet6_ifaddr *ifp, |
287 | unsigned long delay) | |
1da177e4 | 288 | { |
835b474b | 289 | if (!delayed_work_pending(&ifp->dad_work)) |
1da177e4 | 290 | in6_ifa_hold(ifp); |
835b474b | 291 | mod_delayed_work(addrconf_wq, &ifp->dad_work, delay); |
1da177e4 LT |
292 | } |
293 | ||
7f7d9a6b HX |
294 | static int snmp6_alloc_dev(struct inet6_dev *idev) |
295 | { | |
7d720c3e | 296 | if (snmp_mib_init((void __percpu **)idev->stats.ipv6, |
1823e4c8 ED |
297 | sizeof(struct ipstats_mib), |
298 | __alignof__(struct ipstats_mib)) < 0) | |
7f7d9a6b | 299 | goto err_ip; |
be281e55 ED |
300 | idev->stats.icmpv6dev = kzalloc(sizeof(struct icmpv6_mib_device), |
301 | GFP_KERNEL); | |
302 | if (!idev->stats.icmpv6dev) | |
7f7d9a6b | 303 | goto err_icmp; |
be281e55 ED |
304 | idev->stats.icmpv6msgdev = kzalloc(sizeof(struct icmpv6msg_mib_device), |
305 | GFP_KERNEL); | |
306 | if (!idev->stats.icmpv6msgdev) | |
14878f75 | 307 | goto err_icmpmsg; |
7f7d9a6b HX |
308 | |
309 | return 0; | |
310 | ||
14878f75 | 311 | err_icmpmsg: |
be281e55 | 312 | kfree(idev->stats.icmpv6dev); |
7f7d9a6b | 313 | err_icmp: |
7d720c3e | 314 | snmp_mib_free((void __percpu **)idev->stats.ipv6); |
7f7d9a6b | 315 | err_ip: |
aaf70ec7 | 316 | return -ENOMEM; |
7f7d9a6b HX |
317 | } |
318 | ||
16910b98 | 319 | static void snmp6_free_dev(struct inet6_dev *idev) |
7f7d9a6b | 320 | { |
be281e55 ED |
321 | kfree(idev->stats.icmpv6msgdev); |
322 | kfree(idev->stats.icmpv6dev); | |
7d720c3e | 323 | snmp_mib_free((void __percpu **)idev->stats.ipv6); |
7f7d9a6b HX |
324 | } |
325 | ||
1da177e4 LT |
326 | /* Nobody refers to this device, we may destroy it. */ |
327 | ||
328 | void in6_dev_finish_destroy(struct inet6_dev *idev) | |
329 | { | |
330 | struct net_device *dev = idev->dev; | |
547b792c | 331 | |
502a2ffd | 332 | WARN_ON(!list_empty(&idev->addr_list)); |
547b792c | 333 | WARN_ON(idev->mc_list != NULL); |
973d5956 | 334 | WARN_ON(timer_pending(&idev->rs_timer)); |
547b792c | 335 | |
1da177e4 | 336 | #ifdef NET_REFCNT_DEBUG |
91df42be | 337 | pr_debug("%s: %s\n", __func__, dev ? dev->name : "NIL"); |
1da177e4 LT |
338 | #endif |
339 | dev_put(dev); | |
340 | if (!idev->dead) { | |
f3213831 | 341 | pr_warn("Freeing alive inet6 device %p\n", idev); |
1da177e4 LT |
342 | return; |
343 | } | |
344 | snmp6_free_dev(idev); | |
38f57d1a | 345 | kfree_rcu(idev, rcu); |
1da177e4 | 346 | } |
7159039a YH |
347 | EXPORT_SYMBOL(in6_dev_finish_destroy); |
348 | ||
8e5e8f30 | 349 | static struct inet6_dev *ipv6_add_dev(struct net_device *dev) |
1da177e4 LT |
350 | { |
351 | struct inet6_dev *ndev; | |
352 | ||
353 | ASSERT_RTNL(); | |
354 | ||
355 | if (dev->mtu < IPV6_MIN_MTU) | |
356 | return NULL; | |
357 | ||
1ab1457c | 358 | ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL); |
322f74a4 | 359 | |
1ab1457c YH |
360 | if (ndev == NULL) |
361 | return NULL; | |
322f74a4 IO |
362 | |
363 | rwlock_init(&ndev->lock); | |
364 | ndev->dev = dev; | |
502a2ffd | 365 | INIT_LIST_HEAD(&ndev->addr_list); |
973d5956 HFS |
366 | setup_timer(&ndev->rs_timer, addrconf_rs_timer, |
367 | (unsigned long)ndev); | |
c346dca1 | 368 | memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf)); |
322f74a4 IO |
369 | ndev->cnf.mtu6 = dev->mtu; |
370 | ndev->cnf.sysctl = NULL; | |
371 | ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); | |
372 | if (ndev->nd_parms == NULL) { | |
373 | kfree(ndev); | |
374 | return NULL; | |
375 | } | |
0187bdfb BH |
376 | if (ndev->cnf.forwarding) |
377 | dev_disable_lro(dev); | |
322f74a4 IO |
378 | /* We refer to the device */ |
379 | dev_hold(dev); | |
1da177e4 | 380 | |
322f74a4 IO |
381 | if (snmp6_alloc_dev(ndev) < 0) { |
382 | ADBG((KERN_WARNING | |
f3213831 | 383 | "%s: cannot allocate memory for statistics; dev=%s.\n", |
0dc47877 | 384 | __func__, dev->name)); |
322f74a4 | 385 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
8603e33d RL |
386 | dev_put(dev); |
387 | kfree(ndev); | |
322f74a4 IO |
388 | return NULL; |
389 | } | |
1da177e4 | 390 | |
322f74a4 IO |
391 | if (snmp6_register_dev(ndev) < 0) { |
392 | ADBG((KERN_WARNING | |
f3213831 | 393 | "%s: cannot create /proc/net/dev_snmp6/%s\n", |
0dc47877 | 394 | __func__, dev->name)); |
322f74a4 IO |
395 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
396 | ndev->dead = 1; | |
397 | in6_dev_finish_destroy(ndev); | |
398 | return NULL; | |
399 | } | |
400 | ||
401 | /* One reference from device. We must do this before | |
402 | * we invoke __ipv6_regen_rndid(). | |
403 | */ | |
404 | in6_dev_hold(ndev); | |
1da177e4 | 405 | |
1b34be74 YH |
406 | if (dev->flags & (IFF_NOARP | IFF_LOOPBACK)) |
407 | ndev->cnf.accept_dad = -1; | |
408 | ||
07a93626 | 409 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
b077d7ab | 410 | if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) { |
f3213831 | 411 | pr_info("%s: Disabled Multicast RS\n", dev->name); |
b077d7ab YH |
412 | ndev->cnf.rtr_solicits = 0; |
413 | } | |
414 | #endif | |
415 | ||
1da177e4 | 416 | #ifdef CONFIG_IPV6_PRIVACY |
372e6c8f | 417 | INIT_LIST_HEAD(&ndev->tempaddr_list); |
b24b8a24 | 418 | setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev); |
322f74a4 IO |
419 | if ((dev->flags&IFF_LOOPBACK) || |
420 | dev->type == ARPHRD_TUNNEL || | |
9625ed72 | 421 | dev->type == ARPHRD_TUNNEL6 || |
0be669bb | 422 | dev->type == ARPHRD_SIT || |
0be669bb | 423 | dev->type == ARPHRD_NONE) { |
322f74a4 IO |
424 | ndev->cnf.use_tempaddr = -1; |
425 | } else { | |
426 | in6_dev_hold(ndev); | |
427 | ipv6_regen_rndid((unsigned long) ndev); | |
428 | } | |
1da177e4 | 429 | #endif |
914faa14 | 430 | ndev->token = in6addr_any; |
1da177e4 | 431 | |
f24e3d65 | 432 | if (netif_running(dev) && addrconf_qdisc_ok(dev)) |
53aadcc9 HX |
433 | ndev->if_flags |= IF_READY; |
434 | ||
322f74a4 IO |
435 | ipv6_mc_init_dev(ndev); |
436 | ndev->tstamp = jiffies; | |
f52295a9 | 437 | addrconf_sysctl_register(ndev); |
30c4cf57 | 438 | /* protected by rtnl_lock */ |
cf778b00 | 439 | rcu_assign_pointer(dev->ip6_ptr, ndev); |
d88ae4cc | 440 | |
2c5e8933 HFS |
441 | /* Join interface-local all-node multicast group */ |
442 | ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allnodes); | |
443 | ||
d88ae4cc | 444 | /* Join all-node multicast group */ |
f3ee4010 | 445 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes); |
d88ae4cc | 446 | |
d6ddef9e | 447 | /* Join all-router multicast group if forwarding is set */ |
8b2aaede | 448 | if (ndev->cnf.forwarding && (dev->flags & IFF_MULTICAST)) |
d6ddef9e LW |
449 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
450 | ||
1da177e4 LT |
451 | return ndev; |
452 | } | |
453 | ||
8e5e8f30 | 454 | static struct inet6_dev *ipv6_find_idev(struct net_device *dev) |
1da177e4 LT |
455 | { |
456 | struct inet6_dev *idev; | |
457 | ||
458 | ASSERT_RTNL(); | |
459 | ||
e21e8467 SH |
460 | idev = __in6_dev_get(dev); |
461 | if (!idev) { | |
462 | idev = ipv6_add_dev(dev); | |
463 | if (!idev) | |
1da177e4 LT |
464 | return NULL; |
465 | } | |
c5e33bdd | 466 | |
1da177e4 LT |
467 | if (dev->flags&IFF_UP) |
468 | ipv6_mc_up(idev); | |
469 | return idev; | |
470 | } | |
471 | ||
f3a1bfb1 ND |
472 | static int inet6_netconf_msgsize_devconf(int type) |
473 | { | |
474 | int size = NLMSG_ALIGN(sizeof(struct netconfmsg)) | |
475 | + nla_total_size(4); /* NETCONFA_IFINDEX */ | |
476 | ||
76f8f6cb ND |
477 | /* type -1 is used for ALL */ |
478 | if (type == -1 || type == NETCONFA_FORWARDING) | |
f3a1bfb1 | 479 | size += nla_total_size(4); |
b1afce95 | 480 | #ifdef CONFIG_IPV6_MROUTE |
d67b8c61 ND |
481 | if (type == -1 || type == NETCONFA_MC_FORWARDING) |
482 | size += nla_total_size(4); | |
b1afce95 | 483 | #endif |
f3a1bfb1 ND |
484 | |
485 | return size; | |
486 | } | |
487 | ||
488 | static int inet6_netconf_fill_devconf(struct sk_buff *skb, int ifindex, | |
489 | struct ipv6_devconf *devconf, u32 portid, | |
490 | u32 seq, int event, unsigned int flags, | |
491 | int type) | |
492 | { | |
493 | struct nlmsghdr *nlh; | |
494 | struct netconfmsg *ncm; | |
495 | ||
496 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct netconfmsg), | |
497 | flags); | |
498 | if (nlh == NULL) | |
499 | return -EMSGSIZE; | |
500 | ||
501 | ncm = nlmsg_data(nlh); | |
502 | ncm->ncm_family = AF_INET6; | |
503 | ||
504 | if (nla_put_s32(skb, NETCONFA_IFINDEX, ifindex) < 0) | |
505 | goto nla_put_failure; | |
506 | ||
76f8f6cb ND |
507 | /* type -1 is used for ALL */ |
508 | if ((type == -1 || type == NETCONFA_FORWARDING) && | |
f3a1bfb1 ND |
509 | nla_put_s32(skb, NETCONFA_FORWARDING, devconf->forwarding) < 0) |
510 | goto nla_put_failure; | |
b1afce95 | 511 | #ifdef CONFIG_IPV6_MROUTE |
d67b8c61 ND |
512 | if ((type == -1 || type == NETCONFA_MC_FORWARDING) && |
513 | nla_put_s32(skb, NETCONFA_MC_FORWARDING, | |
514 | devconf->mc_forwarding) < 0) | |
515 | goto nla_put_failure; | |
b1afce95 | 516 | #endif |
f3a1bfb1 ND |
517 | return nlmsg_end(skb, nlh); |
518 | ||
519 | nla_put_failure: | |
520 | nlmsg_cancel(skb, nlh); | |
521 | return -EMSGSIZE; | |
522 | } | |
523 | ||
d67b8c61 ND |
524 | void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex, |
525 | struct ipv6_devconf *devconf) | |
f3a1bfb1 ND |
526 | { |
527 | struct sk_buff *skb; | |
528 | int err = -ENOBUFS; | |
529 | ||
530 | skb = nlmsg_new(inet6_netconf_msgsize_devconf(type), GFP_ATOMIC); | |
531 | if (skb == NULL) | |
532 | goto errout; | |
533 | ||
534 | err = inet6_netconf_fill_devconf(skb, ifindex, devconf, 0, 0, | |
535 | RTM_NEWNETCONF, 0, type); | |
536 | if (err < 0) { | |
537 | /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */ | |
538 | WARN_ON(err == -EMSGSIZE); | |
539 | kfree_skb(skb); | |
540 | goto errout; | |
541 | } | |
542 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_NETCONF, NULL, GFP_ATOMIC); | |
543 | return; | |
544 | errout: | |
bd779028 | 545 | rtnl_set_sk_err(net, RTNLGRP_IPV6_NETCONF, err); |
f3a1bfb1 ND |
546 | } |
547 | ||
76f8f6cb ND |
548 | static const struct nla_policy devconf_ipv6_policy[NETCONFA_MAX+1] = { |
549 | [NETCONFA_IFINDEX] = { .len = sizeof(int) }, | |
550 | [NETCONFA_FORWARDING] = { .len = sizeof(int) }, | |
551 | }; | |
552 | ||
553 | static int inet6_netconf_get_devconf(struct sk_buff *in_skb, | |
661d2967 | 554 | struct nlmsghdr *nlh) |
76f8f6cb ND |
555 | { |
556 | struct net *net = sock_net(in_skb->sk); | |
557 | struct nlattr *tb[NETCONFA_MAX+1]; | |
558 | struct netconfmsg *ncm; | |
559 | struct sk_buff *skb; | |
560 | struct ipv6_devconf *devconf; | |
561 | struct inet6_dev *in6_dev; | |
562 | struct net_device *dev; | |
563 | int ifindex; | |
564 | int err; | |
565 | ||
566 | err = nlmsg_parse(nlh, sizeof(*ncm), tb, NETCONFA_MAX, | |
567 | devconf_ipv6_policy); | |
568 | if (err < 0) | |
569 | goto errout; | |
570 | ||
571 | err = EINVAL; | |
572 | if (!tb[NETCONFA_IFINDEX]) | |
573 | goto errout; | |
574 | ||
575 | ifindex = nla_get_s32(tb[NETCONFA_IFINDEX]); | |
576 | switch (ifindex) { | |
577 | case NETCONFA_IFINDEX_ALL: | |
578 | devconf = net->ipv6.devconf_all; | |
579 | break; | |
580 | case NETCONFA_IFINDEX_DEFAULT: | |
581 | devconf = net->ipv6.devconf_dflt; | |
582 | break; | |
583 | default: | |
584 | dev = __dev_get_by_index(net, ifindex); | |
585 | if (dev == NULL) | |
586 | goto errout; | |
587 | in6_dev = __in6_dev_get(dev); | |
588 | if (in6_dev == NULL) | |
589 | goto errout; | |
590 | devconf = &in6_dev->cnf; | |
591 | break; | |
592 | } | |
593 | ||
594 | err = -ENOBUFS; | |
595 | skb = nlmsg_new(inet6_netconf_msgsize_devconf(-1), GFP_ATOMIC); | |
596 | if (skb == NULL) | |
597 | goto errout; | |
598 | ||
599 | err = inet6_netconf_fill_devconf(skb, ifindex, devconf, | |
600 | NETLINK_CB(in_skb).portid, | |
601 | nlh->nlmsg_seq, RTM_NEWNETCONF, 0, | |
602 | -1); | |
603 | if (err < 0) { | |
604 | /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */ | |
605 | WARN_ON(err == -EMSGSIZE); | |
606 | kfree_skb(skb); | |
607 | goto errout; | |
608 | } | |
609 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); | |
610 | errout: | |
611 | return err; | |
612 | } | |
613 | ||
7a674200 ND |
614 | static int inet6_netconf_dump_devconf(struct sk_buff *skb, |
615 | struct netlink_callback *cb) | |
616 | { | |
617 | struct net *net = sock_net(skb->sk); | |
618 | int h, s_h; | |
619 | int idx, s_idx; | |
620 | struct net_device *dev; | |
621 | struct inet6_dev *idev; | |
622 | struct hlist_head *head; | |
623 | ||
624 | s_h = cb->args[0]; | |
625 | s_idx = idx = cb->args[1]; | |
626 | ||
627 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
628 | idx = 0; | |
629 | head = &net->dev_index_head[h]; | |
630 | rcu_read_lock(); | |
63998ac2 ND |
631 | cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^ |
632 | net->dev_base_seq; | |
7a674200 ND |
633 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
634 | if (idx < s_idx) | |
635 | goto cont; | |
636 | idev = __in6_dev_get(dev); | |
637 | if (!idev) | |
638 | goto cont; | |
639 | ||
640 | if (inet6_netconf_fill_devconf(skb, dev->ifindex, | |
641 | &idev->cnf, | |
642 | NETLINK_CB(cb->skb).portid, | |
643 | cb->nlh->nlmsg_seq, | |
644 | RTM_NEWNETCONF, | |
645 | NLM_F_MULTI, | |
646 | -1) <= 0) { | |
647 | rcu_read_unlock(); | |
648 | goto done; | |
649 | } | |
63998ac2 | 650 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
7a674200 ND |
651 | cont: |
652 | idx++; | |
653 | } | |
654 | rcu_read_unlock(); | |
655 | } | |
656 | if (h == NETDEV_HASHENTRIES) { | |
657 | if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_ALL, | |
658 | net->ipv6.devconf_all, | |
659 | NETLINK_CB(cb->skb).portid, | |
660 | cb->nlh->nlmsg_seq, | |
661 | RTM_NEWNETCONF, NLM_F_MULTI, | |
662 | -1) <= 0) | |
663 | goto done; | |
664 | else | |
665 | h++; | |
666 | } | |
667 | if (h == NETDEV_HASHENTRIES + 1) { | |
668 | if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_DEFAULT, | |
669 | net->ipv6.devconf_dflt, | |
670 | NETLINK_CB(cb->skb).portid, | |
671 | cb->nlh->nlmsg_seq, | |
672 | RTM_NEWNETCONF, NLM_F_MULTI, | |
673 | -1) <= 0) | |
674 | goto done; | |
675 | else | |
676 | h++; | |
677 | } | |
678 | done: | |
679 | cb->args[0] = h; | |
680 | cb->args[1] = idx; | |
681 | ||
682 | return skb->len; | |
683 | } | |
684 | ||
1da177e4 LT |
685 | #ifdef CONFIG_SYSCTL |
686 | static void dev_forward_change(struct inet6_dev *idev) | |
687 | { | |
688 | struct net_device *dev; | |
689 | struct inet6_ifaddr *ifa; | |
1da177e4 LT |
690 | |
691 | if (!idev) | |
692 | return; | |
693 | dev = idev->dev; | |
0187bdfb BH |
694 | if (idev->cnf.forwarding) |
695 | dev_disable_lro(dev); | |
1a940835 | 696 | if (dev->flags & IFF_MULTICAST) { |
2c5e8933 | 697 | if (idev->cnf.forwarding) { |
f3ee4010 | 698 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
2c5e8933 HFS |
699 | ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allrouters); |
700 | ipv6_dev_mc_inc(dev, &in6addr_sitelocal_allrouters); | |
701 | } else { | |
f3ee4010 | 702 | ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters); |
2c5e8933 HFS |
703 | ipv6_dev_mc_dec(dev, &in6addr_interfacelocal_allrouters); |
704 | ipv6_dev_mc_dec(dev, &in6addr_sitelocal_allrouters); | |
705 | } | |
1da177e4 | 706 | } |
502a2ffd | 707 | |
708 | list_for_each_entry(ifa, &idev->addr_list, if_list) { | |
2c12a74c MW |
709 | if (ifa->flags&IFA_F_TENTATIVE) |
710 | continue; | |
1da177e4 LT |
711 | if (idev->cnf.forwarding) |
712 | addrconf_join_anycast(ifa); | |
713 | else | |
714 | addrconf_leave_anycast(ifa); | |
715 | } | |
f3a1bfb1 ND |
716 | inet6_netconf_notify_devconf(dev_net(dev), NETCONFA_FORWARDING, |
717 | dev->ifindex, &idev->cnf); | |
1da177e4 LT |
718 | } |
719 | ||
720 | ||
e186932b | 721 | static void addrconf_forward_change(struct net *net, __s32 newf) |
1da177e4 LT |
722 | { |
723 | struct net_device *dev; | |
724 | struct inet6_dev *idev; | |
725 | ||
4acd4945 | 726 | for_each_netdev(net, dev) { |
1da177e4 LT |
727 | idev = __in6_dev_get(dev); |
728 | if (idev) { | |
e186932b PE |
729 | int changed = (!idev->cnf.forwarding) ^ (!newf); |
730 | idev->cnf.forwarding = newf; | |
1da177e4 LT |
731 | if (changed) |
732 | dev_forward_change(idev); | |
733 | } | |
1da177e4 | 734 | } |
1da177e4 | 735 | } |
c8fecf22 | 736 | |
013d97e9 | 737 | static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int newf) |
c8fecf22 | 738 | { |
bff16c2f | 739 | struct net *net; |
013d97e9 FR |
740 | int old; |
741 | ||
742 | if (!rtnl_trylock()) | |
743 | return restart_syscall(); | |
bff16c2f PE |
744 | |
745 | net = (struct net *)table->extra2; | |
013d97e9 FR |
746 | old = *p; |
747 | *p = newf; | |
b325fddb | 748 | |
013d97e9 | 749 | if (p == &net->ipv6.devconf_dflt->forwarding) { |
f3a1bfb1 ND |
750 | if ((!newf) ^ (!old)) |
751 | inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING, | |
752 | NETCONFA_IFINDEX_DEFAULT, | |
753 | net->ipv6.devconf_dflt); | |
013d97e9 FR |
754 | rtnl_unlock(); |
755 | return 0; | |
88af182e | 756 | } |
c8fecf22 | 757 | |
e186932b | 758 | if (p == &net->ipv6.devconf_all->forwarding) { |
e186932b PE |
759 | net->ipv6.devconf_dflt->forwarding = newf; |
760 | addrconf_forward_change(net, newf); | |
f3a1bfb1 ND |
761 | if ((!newf) ^ (!old)) |
762 | inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING, | |
763 | NETCONFA_IFINDEX_ALL, | |
764 | net->ipv6.devconf_all); | |
013d97e9 | 765 | } else if ((!newf) ^ (!old)) |
c8fecf22 | 766 | dev_forward_change((struct inet6_dev *)table->extra1); |
0187bdfb | 767 | rtnl_unlock(); |
6fa3eb70 | 768 | |
013d97e9 | 769 | if (newf) |
7b4da532 | 770 | rt6_purge_dflt_routers(net); |
6fa3eb70 | 771 | |
b325fddb | 772 | return 1; |
c8fecf22 | 773 | } |
1da177e4 LT |
774 | #endif |
775 | ||
5c578aed | 776 | /* Nobody refers to this ifaddr, destroy it */ |
1da177e4 LT |
777 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) |
778 | { | |
c2e21293 | 779 | WARN_ON(!hlist_unhashed(&ifp->addr_lst)); |
547b792c | 780 | |
1da177e4 | 781 | #ifdef NET_REFCNT_DEBUG |
91df42be | 782 | pr_debug("%s\n", __func__); |
1da177e4 LT |
783 | #endif |
784 | ||
785 | in6_dev_put(ifp->idev); | |
786 | ||
835b474b HFS |
787 | if (cancel_delayed_work(&ifp->dad_work)) |
788 | pr_notice("delayed DAD work was pending while freeing ifa=%p\n", | |
789 | ifp); | |
1da177e4 | 790 | |
e9d3e084 | 791 | if (ifp->state != INET6_IFADDR_STATE_DEAD) { |
f3213831 | 792 | pr_warn("Freeing alive inet6 address %p\n", ifp); |
1da177e4 LT |
793 | return; |
794 | } | |
94e187c0 | 795 | ip6_rt_put(ifp->rt); |
1da177e4 | 796 | |
e5785985 | 797 | kfree_rcu(ifp, rcu); |
1da177e4 LT |
798 | } |
799 | ||
e55ffac6 BH |
800 | static void |
801 | ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp) | |
802 | { | |
502a2ffd | 803 | struct list_head *p; |
8a6ce0c0 | 804 | int ifp_scope = ipv6_addr_src_scope(&ifp->addr); |
e55ffac6 BH |
805 | |
806 | /* | |
807 | * Each device address list is sorted in order of scope - | |
808 | * global before linklocal. | |
809 | */ | |
502a2ffd | 810 | list_for_each(p, &idev->addr_list) { |
811 | struct inet6_ifaddr *ifa | |
812 | = list_entry(p, struct inet6_ifaddr, if_list); | |
8a6ce0c0 | 813 | if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr)) |
e55ffac6 BH |
814 | break; |
815 | } | |
816 | ||
b54c9b98 | 817 | list_add_tail(&ifp->if_list, p); |
e55ffac6 BH |
818 | } |
819 | ||
ddbe5032 | 820 | static u32 inet6_addr_hash(const struct in6_addr *addr) |
3eb84f49 | 821 | { |
ddbe5032 | 822 | return hash_32(ipv6_addr_hash(addr), IN6_ADDR_HSIZE_SHIFT); |
3eb84f49 YH |
823 | } |
824 | ||
1da177e4 LT |
825 | /* On success it returns ifp with increased reference count */ |
826 | ||
827 | static struct inet6_ifaddr * | |
828 | ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen, | |
e431b8c0 | 829 | int scope, u32 flags) |
1da177e4 LT |
830 | { |
831 | struct inet6_ifaddr *ifa = NULL; | |
832 | struct rt6_info *rt; | |
3a88a81d | 833 | unsigned int hash; |
1da177e4 | 834 | int err = 0; |
d68b8270 YH |
835 | int addr_type = ipv6_addr_type(addr); |
836 | ||
837 | if (addr_type == IPV6_ADDR_ANY || | |
838 | addr_type & IPV6_ADDR_MULTICAST || | |
839 | (!(idev->dev->flags & IFF_LOOPBACK) && | |
840 | addr_type & IPV6_ADDR_LOOPBACK)) | |
841 | return ERR_PTR(-EADDRNOTAVAIL); | |
1da177e4 | 842 | |
8814c4b5 | 843 | rcu_read_lock_bh(); |
1da177e4 LT |
844 | if (idev->dead) { |
845 | err = -ENODEV; /*XXX*/ | |
846 | goto out2; | |
847 | } | |
848 | ||
56d417b1 | 849 | if (idev->cnf.disable_ipv6) { |
9bdd8d40 BH |
850 | err = -EACCES; |
851 | goto out2; | |
852 | } | |
853 | ||
5c578aed | 854 | spin_lock(&addrconf_hash_lock); |
1da177e4 LT |
855 | |
856 | /* Ignore adding duplicate addresses on an interface */ | |
c346dca1 | 857 | if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) { |
1da177e4 LT |
858 | ADBG(("ipv6_add_addr: already assigned\n")); |
859 | err = -EEXIST; | |
860 | goto out; | |
861 | } | |
862 | ||
322f74a4 | 863 | ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); |
1da177e4 LT |
864 | |
865 | if (ifa == NULL) { | |
866 | ADBG(("ipv6_add_addr: malloc failed\n")); | |
867 | err = -ENOBUFS; | |
868 | goto out; | |
869 | } | |
870 | ||
8f031519 | 871 | rt = addrconf_dst_alloc(idev, addr, false); |
1da177e4 LT |
872 | if (IS_ERR(rt)) { |
873 | err = PTR_ERR(rt); | |
874 | goto out; | |
875 | } | |
876 | ||
4e3fd7a0 | 877 | ifa->addr = *addr; |
1da177e4 LT |
878 | |
879 | spin_lock_init(&ifa->lock); | |
e9d3e084 | 880 | spin_lock_init(&ifa->state_lock); |
835b474b | 881 | INIT_DELAYED_WORK(&ifa->dad_work, addrconf_dad_work); |
c2e21293 | 882 | INIT_HLIST_NODE(&ifa->addr_lst); |
1da177e4 LT |
883 | ifa->scope = scope; |
884 | ifa->prefix_len = pfxlen; | |
885 | ifa->flags = flags | IFA_F_TENTATIVE; | |
886 | ifa->cstamp = ifa->tstamp = jiffies; | |
617fe29d | 887 | ifa->tokenized = false; |
1da177e4 | 888 | |
57f5f544 KF |
889 | ifa->rt = rt; |
890 | ||
1da177e4 LT |
891 | ifa->idev = idev; |
892 | in6_dev_hold(idev); | |
893 | /* For caller */ | |
894 | in6_ifa_hold(ifa); | |
895 | ||
896 | /* Add to big hash table */ | |
ddbe5032 | 897 | hash = inet6_addr_hash(addr); |
1da177e4 | 898 | |
5c578aed | 899 | hlist_add_head_rcu(&ifa->addr_lst, &inet6_addr_lst[hash]); |
5c578aed | 900 | spin_unlock(&addrconf_hash_lock); |
1da177e4 LT |
901 | |
902 | write_lock(&idev->lock); | |
903 | /* Add to inet6_dev unicast addr list. */ | |
e55ffac6 | 904 | ipv6_link_dev_addr(idev, ifa); |
1da177e4 LT |
905 | |
906 | #ifdef CONFIG_IPV6_PRIVACY | |
907 | if (ifa->flags&IFA_F_TEMPORARY) { | |
372e6c8f | 908 | list_add(&ifa->tmp_list, &idev->tempaddr_list); |
1da177e4 LT |
909 | in6_ifa_hold(ifa); |
910 | } | |
911 | #endif | |
912 | ||
1da177e4 LT |
913 | in6_ifa_hold(ifa); |
914 | write_unlock(&idev->lock); | |
915 | out2: | |
8814c4b5 | 916 | rcu_read_unlock_bh(); |
1da177e4 | 917 | |
fd92833a | 918 | if (likely(err == 0)) |
f88c91dd | 919 | inet6addr_notifier_call_chain(NETDEV_UP, ifa); |
1da177e4 LT |
920 | else { |
921 | kfree(ifa); | |
922 | ifa = ERR_PTR(err); | |
923 | } | |
924 | ||
925 | return ifa; | |
926 | out: | |
5c578aed | 927 | spin_unlock(&addrconf_hash_lock); |
1da177e4 LT |
928 | goto out2; |
929 | } | |
930 | ||
931 | /* This function wants to get referenced ifp and releases it before return */ | |
932 | ||
933 | static void ipv6_del_addr(struct inet6_ifaddr *ifp) | |
934 | { | |
502a2ffd | 935 | struct inet6_ifaddr *ifa, *ifn; |
1da177e4 | 936 | struct inet6_dev *idev = ifp->idev; |
4c5ff6a6 | 937 | int state; |
1da177e4 LT |
938 | int deleted = 0, onlink = 0; |
939 | unsigned long expires = jiffies; | |
940 | ||
835b474b HFS |
941 | ASSERT_RTNL(); |
942 | ||
4c5ff6a6 HX |
943 | spin_lock_bh(&ifp->state_lock); |
944 | state = ifp->state; | |
e9d3e084 | 945 | ifp->state = INET6_IFADDR_STATE_DEAD; |
4c5ff6a6 HX |
946 | spin_unlock_bh(&ifp->state_lock); |
947 | ||
948 | if (state == INET6_IFADDR_STATE_DEAD) | |
949 | goto out; | |
1da177e4 | 950 | |
5c578aed | 951 | spin_lock_bh(&addrconf_hash_lock); |
952 | hlist_del_init_rcu(&ifp->addr_lst); | |
5c578aed | 953 | spin_unlock_bh(&addrconf_hash_lock); |
1da177e4 LT |
954 | |
955 | write_lock_bh(&idev->lock); | |
956 | #ifdef CONFIG_IPV6_PRIVACY | |
957 | if (ifp->flags&IFA_F_TEMPORARY) { | |
372e6c8f | 958 | list_del(&ifp->tmp_list); |
959 | if (ifp->ifpub) { | |
960 | in6_ifa_put(ifp->ifpub); | |
961 | ifp->ifpub = NULL; | |
1da177e4 | 962 | } |
372e6c8f | 963 | __in6_ifa_put(ifp); |
1da177e4 LT |
964 | } |
965 | #endif | |
966 | ||
502a2ffd | 967 | list_for_each_entry_safe(ifa, ifn, &idev->addr_list, if_list) { |
1da177e4 | 968 | if (ifa == ifp) { |
502a2ffd | 969 | list_del_init(&ifp->if_list); |
1da177e4 | 970 | __in6_ifa_put(ifp); |
502a2ffd | 971 | |
1da177e4 LT |
972 | if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0) |
973 | break; | |
974 | deleted = 1; | |
1d142804 | 975 | continue; |
1da177e4 LT |
976 | } else if (ifp->flags & IFA_F_PERMANENT) { |
977 | if (ipv6_prefix_equal(&ifa->addr, &ifp->addr, | |
978 | ifp->prefix_len)) { | |
979 | if (ifa->flags & IFA_F_PERMANENT) { | |
980 | onlink = 1; | |
981 | if (deleted) | |
982 | break; | |
983 | } else { | |
984 | unsigned long lifetime; | |
985 | ||
986 | if (!onlink) | |
987 | onlink = -1; | |
988 | ||
989 | spin_lock(&ifa->lock); | |
4bed72e4 YH |
990 | |
991 | lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ); | |
992 | /* | |
993 | * Note: Because this address is | |
994 | * not permanent, lifetime < | |
995 | * LONG_MAX / HZ here. | |
996 | */ | |
1da177e4 LT |
997 | if (time_before(expires, |
998 | ifa->tstamp + lifetime * HZ)) | |
999 | expires = ifa->tstamp + lifetime * HZ; | |
1000 | spin_unlock(&ifa->lock); | |
1001 | } | |
1002 | } | |
1003 | } | |
1004 | } | |
1005 | write_unlock_bh(&idev->lock); | |
1006 | ||
835b474b | 1007 | addrconf_del_dad_work(ifp); |
b2238566 | 1008 | |
1da177e4 LT |
1009 | ipv6_ifa_notify(RTM_DELADDR, ifp); |
1010 | ||
f88c91dd | 1011 | inet6addr_notifier_call_chain(NETDEV_DOWN, ifp); |
1da177e4 | 1012 | |
1da177e4 LT |
1013 | /* |
1014 | * Purge or update corresponding prefix | |
1015 | * | |
1016 | * 1) we don't purge prefix here if address was not permanent. | |
1017 | * prefix is managed by its own lifetime. | |
1018 | * 2) if there're no addresses, delete prefix. | |
1019 | * 3) if there're still other permanent address(es), | |
1020 | * corresponding prefix is still permanent. | |
1021 | * 4) otherwise, update prefix lifetime to the | |
1022 | * longest valid lifetime among the corresponding | |
1023 | * addresses on the device. | |
1024 | * Note: subsequent RA will update lifetime. | |
1025 | * | |
1026 | * --yoshfuji | |
1027 | */ | |
1028 | if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) { | |
1029 | struct in6_addr prefix; | |
1030 | struct rt6_info *rt; | |
64c6d08e | 1031 | |
1da177e4 | 1032 | ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len); |
1da177e4 | 1033 | |
21caa662 RK |
1034 | rt = addrconf_get_prefix_route(&prefix, |
1035 | ifp->prefix_len, | |
1036 | ifp->idev->dev, | |
1037 | 0, RTF_GATEWAY | RTF_DEFAULT); | |
1038 | ||
1039 | if (rt) { | |
1da177e4 | 1040 | if (onlink == 0) { |
e0a1ad73 | 1041 | ip6_del_rt(rt); |
1da177e4 LT |
1042 | rt = NULL; |
1043 | } else if (!(rt->rt6i_flags & RTF_EXPIRES)) { | |
1716a961 | 1044 | rt6_set_expires(rt, expires); |
1da177e4 LT |
1045 | } |
1046 | } | |
94e187c0 | 1047 | ip6_rt_put(rt); |
1da177e4 LT |
1048 | } |
1049 | ||
c3968a85 DW |
1050 | /* clean up prefsrc entries */ |
1051 | rt6_remove_prefsrc(ifp); | |
4c5ff6a6 | 1052 | out: |
1da177e4 LT |
1053 | in6_ifa_put(ifp); |
1054 | } | |
1055 | ||
1056 | #ifdef CONFIG_IPV6_PRIVACY | |
1057 | static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) | |
1058 | { | |
1059 | struct inet6_dev *idev = ifp->idev; | |
1060 | struct in6_addr addr, *tmpaddr; | |
76f793e3 | 1061 | unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_tstamp, age; |
eac55bf9 | 1062 | unsigned long regen_advance; |
1da177e4 LT |
1063 | int tmp_plen; |
1064 | int ret = 0; | |
1065 | int max_addresses; | |
95c385b4 | 1066 | u32 addr_flags; |
76f793e3 | 1067 | unsigned long now = jiffies; |
1da177e4 LT |
1068 | |
1069 | write_lock(&idev->lock); | |
1070 | if (ift) { | |
1071 | spin_lock_bh(&ift->lock); | |
1072 | memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); | |
1073 | spin_unlock_bh(&ift->lock); | |
1074 | tmpaddr = &addr; | |
1075 | } else { | |
1076 | tmpaddr = NULL; | |
1077 | } | |
1078 | retry: | |
1079 | in6_dev_hold(idev); | |
1080 | if (idev->cnf.use_tempaddr <= 0) { | |
1081 | write_unlock(&idev->lock); | |
f3213831 | 1082 | pr_info("%s: use_tempaddr is disabled\n", __func__); |
1da177e4 LT |
1083 | in6_dev_put(idev); |
1084 | ret = -1; | |
1085 | goto out; | |
1086 | } | |
1087 | spin_lock_bh(&ifp->lock); | |
1088 | if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { | |
1089 | idev->cnf.use_tempaddr = -1; /*XXX*/ | |
1090 | spin_unlock_bh(&ifp->lock); | |
1091 | write_unlock(&idev->lock); | |
f3213831 JP |
1092 | pr_warn("%s: regeneration time exceeded - disabled temporary address support\n", |
1093 | __func__); | |
1da177e4 LT |
1094 | in6_dev_put(idev); |
1095 | ret = -1; | |
1096 | goto out; | |
1097 | } | |
1098 | in6_ifa_hold(ifp); | |
1099 | memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); | |
eb7e0575 | 1100 | __ipv6_try_regen_rndid(idev, tmpaddr); |
1da177e4 | 1101 | memcpy(&addr.s6_addr[8], idev->rndid, 8); |
76f793e3 | 1102 | age = (now - ifp->tstamp) / HZ; |
1da177e4 LT |
1103 | tmp_valid_lft = min_t(__u32, |
1104 | ifp->valid_lft, | |
7a876b0e | 1105 | idev->cnf.temp_valid_lft + age); |
1ab1457c YH |
1106 | tmp_prefered_lft = min_t(__u32, |
1107 | ifp->prefered_lft, | |
7a876b0e | 1108 | idev->cnf.temp_prefered_lft + age - |
784e2710 | 1109 | idev->cnf.max_desync_factor); |
1da177e4 LT |
1110 | tmp_plen = ifp->prefix_len; |
1111 | max_addresses = idev->cnf.max_addresses; | |
1da177e4 LT |
1112 | tmp_tstamp = ifp->tstamp; |
1113 | spin_unlock_bh(&ifp->lock); | |
1114 | ||
eac55bf9 BB |
1115 | regen_advance = idev->cnf.regen_max_retry * |
1116 | idev->cnf.dad_transmits * | |
1117 | idev->nd_parms->retrans_time / HZ; | |
1da177e4 | 1118 | write_unlock(&idev->lock); |
95c385b4 | 1119 | |
eac55bf9 BB |
1120 | /* A temporary address is created only if this calculated Preferred |
1121 | * Lifetime is greater than REGEN_ADVANCE time units. In particular, | |
1122 | * an implementation must not create a temporary address with a zero | |
1123 | * Preferred Lifetime. | |
9b12db3d HK |
1124 | * Use age calculation as in addrconf_verify to avoid unnecessary |
1125 | * temporary addresses being generated. | |
eac55bf9 | 1126 | */ |
9b12db3d HK |
1127 | age = (now - tmp_tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ; |
1128 | if (tmp_prefered_lft <= regen_advance + age) { | |
eac55bf9 BB |
1129 | in6_ifa_put(ifp); |
1130 | in6_dev_put(idev); | |
1131 | ret = -1; | |
1132 | goto out; | |
1133 | } | |
1134 | ||
95c385b4 NH |
1135 | addr_flags = IFA_F_TEMPORARY; |
1136 | /* set in addrconf_prefix_rcv() */ | |
1137 | if (ifp->flags & IFA_F_OPTIMISTIC) | |
1138 | addr_flags |= IFA_F_OPTIMISTIC; | |
1139 | ||
ad558a29 HFS |
1140 | ift = ipv6_add_addr(idev, &addr, tmp_plen, |
1141 | ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, | |
1142 | addr_flags); | |
1143 | if (IS_ERR(ift)) { | |
1da177e4 LT |
1144 | in6_ifa_put(ifp); |
1145 | in6_dev_put(idev); | |
f3213831 | 1146 | pr_info("%s: retry temporary address regeneration\n", __func__); |
1da177e4 LT |
1147 | tmpaddr = &addr; |
1148 | write_lock(&idev->lock); | |
1149 | goto retry; | |
1150 | } | |
1151 | ||
1152 | spin_lock_bh(&ift->lock); | |
1153 | ift->ifpub = ifp; | |
1154 | ift->valid_lft = tmp_valid_lft; | |
1155 | ift->prefered_lft = tmp_prefered_lft; | |
76f793e3 | 1156 | ift->cstamp = now; |
1da177e4 LT |
1157 | ift->tstamp = tmp_tstamp; |
1158 | spin_unlock_bh(&ift->lock); | |
1159 | ||
cf22f9a2 | 1160 | addrconf_dad_start(ift); |
1da177e4 LT |
1161 | in6_ifa_put(ift); |
1162 | in6_dev_put(idev); | |
1163 | out: | |
1164 | return ret; | |
1165 | } | |
1166 | #endif | |
1167 | ||
1168 | /* | |
072047e4 | 1169 | * Choose an appropriate source address (RFC3484) |
1da177e4 | 1170 | */ |
a9b05723 YH |
1171 | enum { |
1172 | IPV6_SADDR_RULE_INIT = 0, | |
1173 | IPV6_SADDR_RULE_LOCAL, | |
1174 | IPV6_SADDR_RULE_SCOPE, | |
1175 | IPV6_SADDR_RULE_PREFERRED, | |
1176 | #ifdef CONFIG_IPV6_MIP6 | |
1177 | IPV6_SADDR_RULE_HOA, | |
1178 | #endif | |
1179 | IPV6_SADDR_RULE_OIF, | |
1180 | IPV6_SADDR_RULE_LABEL, | |
1181 | #ifdef CONFIG_IPV6_PRIVACY | |
1182 | IPV6_SADDR_RULE_PRIVACY, | |
1183 | #endif | |
1184 | IPV6_SADDR_RULE_ORCHID, | |
1185 | IPV6_SADDR_RULE_PREFIX, | |
1186 | IPV6_SADDR_RULE_MAX | |
1187 | }; | |
1188 | ||
072047e4 | 1189 | struct ipv6_saddr_score { |
a9b05723 YH |
1190 | int rule; |
1191 | int addr_type; | |
1192 | struct inet6_ifaddr *ifa; | |
1193 | DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX); | |
1194 | int scopedist; | |
1195 | int matchlen; | |
072047e4 YH |
1196 | }; |
1197 | ||
a9b05723 | 1198 | struct ipv6_saddr_dst { |
9acd9f3a | 1199 | const struct in6_addr *addr; |
a9b05723 YH |
1200 | int ifindex; |
1201 | int scope; | |
1202 | int label; | |
7cbca67c | 1203 | unsigned int prefs; |
a9b05723 | 1204 | }; |
072047e4 | 1205 | |
b6f99a21 | 1206 | static inline int ipv6_saddr_preferred(int type) |
1da177e4 | 1207 | { |
45bb0060 | 1208 | if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|IPV6_ADDR_LOOPBACK)) |
072047e4 YH |
1209 | return 1; |
1210 | return 0; | |
1da177e4 LT |
1211 | } |
1212 | ||
3de23255 BT |
1213 | static int ipv6_get_saddr_eval(struct net *net, |
1214 | struct ipv6_saddr_score *score, | |
a9b05723 YH |
1215 | struct ipv6_saddr_dst *dst, |
1216 | int i) | |
1217 | { | |
1218 | int ret; | |
1219 | ||
1220 | if (i <= score->rule) { | |
1221 | switch (i) { | |
1222 | case IPV6_SADDR_RULE_SCOPE: | |
1223 | ret = score->scopedist; | |
1224 | break; | |
1225 | case IPV6_SADDR_RULE_PREFIX: | |
1226 | ret = score->matchlen; | |
1227 | break; | |
1228 | default: | |
1229 | ret = !!test_bit(i, score->scorebits); | |
1230 | } | |
1231 | goto out; | |
1232 | } | |
1233 | ||
1234 | switch (i) { | |
1235 | case IPV6_SADDR_RULE_INIT: | |
1236 | /* Rule 0: remember if hiscore is not ready yet */ | |
1237 | ret = !!score->ifa; | |
1238 | break; | |
1239 | case IPV6_SADDR_RULE_LOCAL: | |
1240 | /* Rule 1: Prefer same address */ | |
1241 | ret = ipv6_addr_equal(&score->ifa->addr, dst->addr); | |
1242 | break; | |
1243 | case IPV6_SADDR_RULE_SCOPE: | |
1244 | /* Rule 2: Prefer appropriate scope | |
1245 | * | |
1246 | * ret | |
1247 | * ^ | |
1248 | * -1 | d 15 | |
1249 | * ---+--+-+---> scope | |
1250 | * | | |
1251 | * | d is scope of the destination. | |
1252 | * B-d | \ | |
1253 | * | \ <- smaller scope is better if | |
1254 | * B-15 | \ if scope is enough for destinaion. | |
1255 | * | ret = B - scope (-1 <= scope >= d <= 15). | |
1256 | * d-C-1 | / | |
1257 | * |/ <- greater is better | |
1258 | * -C / if scope is not enough for destination. | |
1259 | * /| ret = scope - C (-1 <= d < scope <= 15). | |
1260 | * | |
1261 | * d - C - 1 < B -15 (for all -1 <= d <= 15). | |
1262 | * C > d + 14 - B >= 15 + 14 - B = 29 - B. | |
1263 | * Assume B = 0 and we get C > 29. | |
1264 | */ | |
1265 | ret = __ipv6_addr_src_scope(score->addr_type); | |
1266 | if (ret >= dst->scope) | |
1267 | ret = -ret; | |
1268 | else | |
1269 | ret -= 128; /* 30 is enough */ | |
1270 | score->scopedist = ret; | |
1271 | break; | |
1272 | case IPV6_SADDR_RULE_PREFERRED: | |
1273 | /* Rule 3: Avoid deprecated and optimistic addresses */ | |
1274 | ret = ipv6_saddr_preferred(score->addr_type) || | |
1275 | !(score->ifa->flags & (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)); | |
1276 | break; | |
1277 | #ifdef CONFIG_IPV6_MIP6 | |
1278 | case IPV6_SADDR_RULE_HOA: | |
7cbca67c | 1279 | { |
a9b05723 | 1280 | /* Rule 4: Prefer home address */ |
7cbca67c YH |
1281 | int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA); |
1282 | ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome; | |
a9b05723 | 1283 | break; |
7cbca67c | 1284 | } |
a9b05723 YH |
1285 | #endif |
1286 | case IPV6_SADDR_RULE_OIF: | |
1287 | /* Rule 5: Prefer outgoing interface */ | |
1288 | ret = (!dst->ifindex || | |
1289 | dst->ifindex == score->ifa->idev->dev->ifindex); | |
1290 | break; | |
1291 | case IPV6_SADDR_RULE_LABEL: | |
1292 | /* Rule 6: Prefer matching label */ | |
3de23255 BT |
1293 | ret = ipv6_addr_label(net, |
1294 | &score->ifa->addr, score->addr_type, | |
a9b05723 YH |
1295 | score->ifa->idev->dev->ifindex) == dst->label; |
1296 | break; | |
1297 | #ifdef CONFIG_IPV6_PRIVACY | |
1298 | case IPV6_SADDR_RULE_PRIVACY: | |
7cbca67c | 1299 | { |
a9b05723 | 1300 | /* Rule 7: Prefer public address |
25985edc | 1301 | * Note: prefer temporary address if use_tempaddr >= 2 |
a9b05723 | 1302 | */ |
7cbca67c YH |
1303 | int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ? |
1304 | !!(dst->prefs & IPV6_PREFER_SRC_TMP) : | |
1305 | score->ifa->idev->cnf.use_tempaddr >= 2; | |
1306 | ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp; | |
a9b05723 | 1307 | break; |
7cbca67c | 1308 | } |
a9b05723 YH |
1309 | #endif |
1310 | case IPV6_SADDR_RULE_ORCHID: | |
1311 | /* Rule 8-: Prefer ORCHID vs ORCHID or | |
1312 | * non-ORCHID vs non-ORCHID | |
1313 | */ | |
1314 | ret = !(ipv6_addr_orchid(&score->ifa->addr) ^ | |
1315 | ipv6_addr_orchid(dst->addr)); | |
1316 | break; | |
1317 | case IPV6_SADDR_RULE_PREFIX: | |
1318 | /* Rule 8: Use longest matching prefix */ | |
91b4b04f YH |
1319 | ret = ipv6_addr_diff(&score->ifa->addr, dst->addr); |
1320 | if (ret > score->ifa->prefix_len) | |
1321 | ret = score->ifa->prefix_len; | |
1322 | score->matchlen = ret; | |
a9b05723 YH |
1323 | break; |
1324 | default: | |
1325 | ret = 0; | |
1326 | } | |
1327 | ||
1328 | if (ret) | |
1329 | __set_bit(i, score->scorebits); | |
1330 | score->rule = i; | |
1331 | out: | |
1332 | return ret; | |
1333 | } | |
1334 | ||
b3f644fc | 1335 | int ipv6_dev_get_saddr(struct net *net, const struct net_device *dst_dev, |
9acd9f3a | 1336 | const struct in6_addr *daddr, unsigned int prefs, |
7cbca67c | 1337 | struct in6_addr *saddr) |
1da177e4 | 1338 | { |
a9b05723 YH |
1339 | struct ipv6_saddr_score scores[2], |
1340 | *score = &scores[0], *hiscore = &scores[1]; | |
a9b05723 | 1341 | struct ipv6_saddr_dst dst; |
072047e4 | 1342 | struct net_device *dev; |
a9b05723 | 1343 | int dst_type; |
1da177e4 | 1344 | |
a9b05723 YH |
1345 | dst_type = __ipv6_addr_type(daddr); |
1346 | dst.addr = daddr; | |
1347 | dst.ifindex = dst_dev ? dst_dev->ifindex : 0; | |
1348 | dst.scope = __ipv6_addr_src_scope(dst_type); | |
3de23255 | 1349 | dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex); |
7cbca67c | 1350 | dst.prefs = prefs; |
a9b05723 YH |
1351 | |
1352 | hiscore->rule = -1; | |
1353 | hiscore->ifa = NULL; | |
1da177e4 | 1354 | |
8814c4b5 | 1355 | rcu_read_lock(); |
1da177e4 | 1356 | |
c6d14c84 | 1357 | for_each_netdev_rcu(net, dev) { |
072047e4 | 1358 | struct inet6_dev *idev; |
072047e4 | 1359 | |
a9b05723 | 1360 | /* Candidate Source Address (section 4) |
072047e4 YH |
1361 | * - multicast and link-local destination address, |
1362 | * the set of candidate source address MUST only | |
1363 | * include addresses assigned to interfaces | |
1364 | * belonging to the same link as the outgoing | |
1365 | * interface. | |
1366 | * (- For site-local destination addresses, the | |
1367 | * set of candidate source addresses MUST only | |
1368 | * include addresses assigned to interfaces | |
1369 | * belonging to the same site as the outgoing | |
1370 | * interface.) | |
1371 | */ | |
a9b05723 YH |
1372 | if (((dst_type & IPV6_ADDR_MULTICAST) || |
1373 | dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL) && | |
1374 | dst.ifindex && dev->ifindex != dst.ifindex) | |
072047e4 | 1375 | continue; |
1da177e4 | 1376 | |
1da177e4 | 1377 | idev = __in6_dev_get(dev); |
072047e4 YH |
1378 | if (!idev) |
1379 | continue; | |
1380 | ||
1381 | read_lock_bh(&idev->lock); | |
502a2ffd | 1382 | list_for_each_entry(score->ifa, &idev->addr_list, if_list) { |
a9b05723 | 1383 | int i; |
072047e4 | 1384 | |
a9b05723 | 1385 | /* |
6b3ae80a YH |
1386 | * - Tentative Address (RFC2462 section 5.4) |
1387 | * - A tentative address is not considered | |
1388 | * "assigned to an interface" in the traditional | |
95c385b4 | 1389 | * sense, unless it is also flagged as optimistic. |
6b3ae80a | 1390 | * - Candidate Source Address (section 4) |
072047e4 YH |
1391 | * - In any case, anycast addresses, multicast |
1392 | * addresses, and the unspecified address MUST | |
1393 | * NOT be included in a candidate set. | |
1394 | */ | |
a9b05723 YH |
1395 | if ((score->ifa->flags & IFA_F_TENTATIVE) && |
1396 | (!(score->ifa->flags & IFA_F_OPTIMISTIC))) | |
6b3ae80a | 1397 | continue; |
a9b05723 YH |
1398 | |
1399 | score->addr_type = __ipv6_addr_type(&score->ifa->addr); | |
1400 | ||
1401 | if (unlikely(score->addr_type == IPV6_ADDR_ANY || | |
1402 | score->addr_type & IPV6_ADDR_MULTICAST)) { | |
072047e4 | 1403 | LIMIT_NETDEBUG(KERN_DEBUG |
3b6d821c | 1404 | "ADDRCONF: unspecified / multicast address " |
072047e4 YH |
1405 | "assigned as unicast address on %s", |
1406 | dev->name); | |
1407 | continue; | |
1408 | } | |
1409 | ||
a9b05723 YH |
1410 | score->rule = -1; |
1411 | bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX); | |
1412 | ||
1413 | for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) { | |
1414 | int minihiscore, miniscore; | |
1415 | ||
3de23255 BT |
1416 | minihiscore = ipv6_get_saddr_eval(net, hiscore, &dst, i); |
1417 | miniscore = ipv6_get_saddr_eval(net, score, &dst, i); | |
a9b05723 YH |
1418 | |
1419 | if (minihiscore > miniscore) { | |
1420 | if (i == IPV6_SADDR_RULE_SCOPE && | |
1421 | score->scopedist > 0) { | |
1422 | /* | |
1423 | * special case: | |
1424 | * each remaining entry | |
1425 | * has too small (not enough) | |
1426 | * scope, because ifa entries | |
1427 | * are sorted by their scope | |
1428 | * values. | |
1429 | */ | |
1430 | goto try_nextdev; | |
1431 | } | |
1432 | break; | |
1433 | } else if (minihiscore < miniscore) { | |
a9b05723 YH |
1434 | if (hiscore->ifa) |
1435 | in6_ifa_put(hiscore->ifa); | |
1436 | ||
1437 | in6_ifa_hold(score->ifa); | |
1438 | ||
a0bffffc | 1439 | swap(hiscore, score); |
a9b05723 YH |
1440 | |
1441 | /* restore our iterator */ | |
1442 | score->ifa = hiscore->ifa; | |
1443 | ||
1444 | break; | |
1da177e4 | 1445 | } |
072047e4 | 1446 | } |
1da177e4 | 1447 | } |
a9b05723 | 1448 | try_nextdev: |
072047e4 | 1449 | read_unlock_bh(&idev->lock); |
1da177e4 | 1450 | } |
8814c4b5 | 1451 | rcu_read_unlock(); |
1da177e4 | 1452 | |
a9b05723 | 1453 | if (!hiscore->ifa) |
072047e4 | 1454 | return -EADDRNOTAVAIL; |
1ab1457c | 1455 | |
4e3fd7a0 | 1456 | *saddr = hiscore->ifa->addr; |
a9b05723 | 1457 | in6_ifa_put(hiscore->ifa); |
072047e4 | 1458 | return 0; |
1da177e4 | 1459 | } |
5e5f3f0f | 1460 | EXPORT_SYMBOL(ipv6_dev_get_saddr); |
1da177e4 | 1461 | |
36bddbad AW |
1462 | int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr, |
1463 | unsigned char banned_flags) | |
1464 | { | |
1465 | struct inet6_ifaddr *ifp; | |
1466 | int err = -EADDRNOTAVAIL; | |
1467 | ||
1468 | list_for_each_entry(ifp, &idev->addr_list, if_list) { | |
1469 | if (ifp->scope == IFA_LINK && | |
1470 | !(ifp->flags & banned_flags)) { | |
1471 | *addr = ifp->addr; | |
1472 | err = 0; | |
1473 | break; | |
1474 | } | |
1475 | } | |
1476 | return err; | |
1477 | } | |
1478 | ||
95c385b4 NH |
1479 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, |
1480 | unsigned char banned_flags) | |
1da177e4 LT |
1481 | { |
1482 | struct inet6_dev *idev; | |
1483 | int err = -EADDRNOTAVAIL; | |
1484 | ||
8814c4b5 | 1485 | rcu_read_lock(); |
e21e8467 SH |
1486 | idev = __in6_dev_get(dev); |
1487 | if (idev) { | |
1da177e4 | 1488 | read_lock_bh(&idev->lock); |
36bddbad | 1489 | err = __ipv6_get_lladdr(idev, addr, banned_flags); |
1da177e4 LT |
1490 | read_unlock_bh(&idev->lock); |
1491 | } | |
8814c4b5 | 1492 | rcu_read_unlock(); |
1da177e4 LT |
1493 | return err; |
1494 | } | |
1495 | ||
1496 | static int ipv6_count_addresses(struct inet6_dev *idev) | |
1497 | { | |
1498 | int cnt = 0; | |
1499 | struct inet6_ifaddr *ifp; | |
1500 | ||
1501 | read_lock_bh(&idev->lock); | |
502a2ffd | 1502 | list_for_each_entry(ifp, &idev->addr_list, if_list) |
1da177e4 LT |
1503 | cnt++; |
1504 | read_unlock_bh(&idev->lock); | |
1505 | return cnt; | |
1506 | } | |
1507 | ||
b71d1d42 | 1508 | int ipv6_chk_addr(struct net *net, const struct in6_addr *addr, |
2a7851bf | 1509 | const struct net_device *dev, int strict) |
1da177e4 | 1510 | { |
eedf042a | 1511 | struct inet6_ifaddr *ifp; |
ddbe5032 | 1512 | unsigned int hash = inet6_addr_hash(addr); |
1da177e4 | 1513 | |
5c578aed | 1514 | rcu_read_lock_bh(); |
b67bfe0d | 1515 | hlist_for_each_entry_rcu(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1516 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
bfeade08 | 1517 | continue; |
1da177e4 | 1518 | if (ipv6_addr_equal(&ifp->addr, addr) && |
eedf042a SH |
1519 | !(ifp->flags&IFA_F_TENTATIVE) && |
1520 | (dev == NULL || ifp->idev->dev == dev || | |
1521 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))) { | |
1522 | rcu_read_unlock_bh(); | |
1523 | return 1; | |
1da177e4 LT |
1524 | } |
1525 | } | |
5c578aed | 1526 | |
eedf042a SH |
1527 | rcu_read_unlock_bh(); |
1528 | return 0; | |
1da177e4 | 1529 | } |
7159039a YH |
1530 | EXPORT_SYMBOL(ipv6_chk_addr); |
1531 | ||
3e81c6da DM |
1532 | static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
1533 | struct net_device *dev) | |
1da177e4 | 1534 | { |
ddbe5032 | 1535 | unsigned int hash = inet6_addr_hash(addr); |
c2e21293 | 1536 | struct inet6_ifaddr *ifp; |
1da177e4 | 1537 | |
b67bfe0d | 1538 | hlist_for_each_entry(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1539 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
06bfe655 | 1540 | continue; |
1da177e4 LT |
1541 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
1542 | if (dev == NULL || ifp->idev->dev == dev) | |
3e81c6da | 1543 | return true; |
1da177e4 LT |
1544 | } |
1545 | } | |
3e81c6da | 1546 | return false; |
1da177e4 LT |
1547 | } |
1548 | ||
6ea2edb3 CB |
1549 | /* Compares an address/prefix_len with addresses on device @dev. |
1550 | * If one is found it returns true. | |
1551 | */ | |
1552 | bool ipv6_chk_custom_prefix(const struct in6_addr *addr, | |
1553 | const unsigned int prefix_len, struct net_device *dev) | |
1554 | { | |
1555 | struct inet6_dev *idev; | |
1556 | struct inet6_ifaddr *ifa; | |
1557 | bool ret = false; | |
1558 | ||
1559 | rcu_read_lock(); | |
1560 | idev = __in6_dev_get(dev); | |
1561 | if (idev) { | |
1562 | read_lock_bh(&idev->lock); | |
1563 | list_for_each_entry(ifa, &idev->addr_list, if_list) { | |
1564 | ret = ipv6_prefix_equal(addr, &ifa->addr, prefix_len); | |
1565 | if (ret) | |
1566 | break; | |
1567 | } | |
1568 | read_unlock_bh(&idev->lock); | |
1569 | } | |
1570 | rcu_read_unlock(); | |
1571 | ||
1572 | return ret; | |
1573 | } | |
1574 | EXPORT_SYMBOL(ipv6_chk_custom_prefix); | |
1575 | ||
b71d1d42 | 1576 | int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev) |
52eeeb84 YH |
1577 | { |
1578 | struct inet6_dev *idev; | |
1579 | struct inet6_ifaddr *ifa; | |
1580 | int onlink; | |
1581 | ||
1582 | onlink = 0; | |
1583 | rcu_read_lock(); | |
1584 | idev = __in6_dev_get(dev); | |
1585 | if (idev) { | |
1586 | read_lock_bh(&idev->lock); | |
502a2ffd | 1587 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
52eeeb84 YH |
1588 | onlink = ipv6_prefix_equal(addr, &ifa->addr, |
1589 | ifa->prefix_len); | |
1590 | if (onlink) | |
1591 | break; | |
1592 | } | |
1593 | read_unlock_bh(&idev->lock); | |
1594 | } | |
1595 | rcu_read_unlock(); | |
1596 | return onlink; | |
1597 | } | |
52eeeb84 YH |
1598 | EXPORT_SYMBOL(ipv6_chk_prefix); |
1599 | ||
9acd9f3a | 1600 | struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr, |
1cab3da6 | 1601 | struct net_device *dev, int strict) |
1da177e4 | 1602 | { |
b79d1d54 | 1603 | struct inet6_ifaddr *ifp, *result = NULL; |
ddbe5032 | 1604 | unsigned int hash = inet6_addr_hash(addr); |
1da177e4 | 1605 | |
5c578aed | 1606 | rcu_read_lock_bh(); |
b67bfe0d | 1607 | hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1608 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
1cab3da6 | 1609 | continue; |
1da177e4 LT |
1610 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
1611 | if (dev == NULL || ifp->idev->dev == dev || | |
1612 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { | |
b79d1d54 | 1613 | result = ifp; |
1da177e4 LT |
1614 | in6_ifa_hold(ifp); |
1615 | break; | |
1616 | } | |
1617 | } | |
1618 | } | |
5c578aed | 1619 | rcu_read_unlock_bh(); |
1da177e4 | 1620 | |
b79d1d54 | 1621 | return result; |
1da177e4 LT |
1622 | } |
1623 | ||
1da177e4 LT |
1624 | /* Gets referenced address, destroys ifaddr */ |
1625 | ||
cc411d0b | 1626 | static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed) |
1da177e4 | 1627 | { |
1da177e4 LT |
1628 | if (ifp->flags&IFA_F_PERMANENT) { |
1629 | spin_lock_bh(&ifp->lock); | |
835b474b | 1630 | addrconf_del_dad_work(ifp); |
1da177e4 | 1631 | ifp->flags |= IFA_F_TENTATIVE; |
cc411d0b BH |
1632 | if (dad_failed) |
1633 | ifp->flags |= IFA_F_DADFAILED; | |
1da177e4 | 1634 | spin_unlock_bh(&ifp->lock); |
e2577a06 HX |
1635 | if (dad_failed) |
1636 | ipv6_ifa_notify(0, ifp); | |
1da177e4 LT |
1637 | in6_ifa_put(ifp); |
1638 | #ifdef CONFIG_IPV6_PRIVACY | |
1639 | } else if (ifp->flags&IFA_F_TEMPORARY) { | |
1640 | struct inet6_ifaddr *ifpub; | |
1641 | spin_lock_bh(&ifp->lock); | |
1642 | ifpub = ifp->ifpub; | |
1643 | if (ifpub) { | |
1644 | in6_ifa_hold(ifpub); | |
1645 | spin_unlock_bh(&ifp->lock); | |
1646 | ipv6_create_tempaddr(ifpub, ifp); | |
1647 | in6_ifa_put(ifpub); | |
1648 | } else { | |
1649 | spin_unlock_bh(&ifp->lock); | |
1650 | } | |
1651 | ipv6_del_addr(ifp); | |
1652 | #endif | |
835b474b | 1653 | } else { |
1da177e4 | 1654 | ipv6_del_addr(ifp); |
835b474b | 1655 | } |
1da177e4 LT |
1656 | } |
1657 | ||
f2344a13 HX |
1658 | static int addrconf_dad_end(struct inet6_ifaddr *ifp) |
1659 | { | |
1660 | int err = -ENOENT; | |
1661 | ||
835b474b | 1662 | spin_lock_bh(&ifp->state_lock); |
f2344a13 HX |
1663 | if (ifp->state == INET6_IFADDR_STATE_DAD) { |
1664 | ifp->state = INET6_IFADDR_STATE_POSTDAD; | |
1665 | err = 0; | |
1666 | } | |
835b474b | 1667 | spin_unlock_bh(&ifp->state_lock); |
f2344a13 HX |
1668 | |
1669 | return err; | |
1670 | } | |
1671 | ||
3c21edbd YH |
1672 | void addrconf_dad_failure(struct inet6_ifaddr *ifp) |
1673 | { | |
1b34be74 | 1674 | struct inet6_dev *idev = ifp->idev; |
9bdd8d40 | 1675 | |
853dc2e0 UB |
1676 | if (addrconf_dad_end(ifp)) { |
1677 | in6_ifa_put(ifp); | |
f2344a13 | 1678 | return; |
853dc2e0 | 1679 | } |
f2344a13 | 1680 | |
e87cc472 JP |
1681 | net_info_ratelimited("%s: IPv6 duplicate address %pI6c detected!\n", |
1682 | ifp->idev->dev->name, &ifp->addr); | |
9bdd8d40 | 1683 | |
1b34be74 YH |
1684 | if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6) { |
1685 | struct in6_addr addr; | |
1686 | ||
1687 | addr.s6_addr32[0] = htonl(0xfe800000); | |
1688 | addr.s6_addr32[1] = 0; | |
1689 | ||
1690 | if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) && | |
1691 | ipv6_addr_equal(&ifp->addr, &addr)) { | |
1692 | /* DAD failed for link-local based on MAC address */ | |
1693 | idev->cnf.disable_ipv6 = 1; | |
9bdd8d40 | 1694 | |
f3213831 | 1695 | pr_info("%s: IPv6 being disabled!\n", |
9bdd8d40 | 1696 | ifp->idev->dev->name); |
1b34be74 YH |
1697 | } |
1698 | } | |
1699 | ||
835b474b HFS |
1700 | spin_lock_bh(&ifp->state_lock); |
1701 | /* transition from _POSTDAD to _ERRDAD */ | |
1702 | ifp->state = INET6_IFADDR_STATE_ERRDAD; | |
1703 | spin_unlock_bh(&ifp->state_lock); | |
1da177e4 | 1704 | |
835b474b | 1705 | addrconf_mod_dad_work(ifp, 0); |
04355d67 | 1706 | in6_ifa_put(ifp); |
3c21edbd | 1707 | } |
1da177e4 | 1708 | |
b64222a9 SD |
1709 | /* Join to solicited addr multicast group. |
1710 | * caller must hold RTNL */ | |
b71d1d42 | 1711 | void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr) |
1da177e4 LT |
1712 | { |
1713 | struct in6_addr maddr; | |
1714 | ||
1715 | if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1716 | return; | |
1717 | ||
1718 | addrconf_addr_solict_mult(addr, &maddr); | |
1719 | ipv6_dev_mc_inc(dev, &maddr); | |
1720 | } | |
1721 | ||
b64222a9 | 1722 | /* caller must hold RTNL */ |
b71d1d42 | 1723 | void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr) |
1da177e4 LT |
1724 | { |
1725 | struct in6_addr maddr; | |
1726 | ||
1727 | if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1728 | return; | |
1729 | ||
1730 | addrconf_addr_solict_mult(addr, &maddr); | |
1731 | __ipv6_dev_mc_dec(idev, &maddr); | |
1732 | } | |
1733 | ||
b64222a9 | 1734 | /* caller must hold RTNL */ |
20380731 | 1735 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1736 | { |
1737 | struct in6_addr addr; | |
835b474b | 1738 | |
2bda8a0c BM |
1739 | if (ifp->prefix_len == 127) /* RFC 6164 */ |
1740 | return; | |
1da177e4 LT |
1741 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
1742 | if (ipv6_addr_any(&addr)) | |
1743 | return; | |
1744 | ipv6_dev_ac_inc(ifp->idev->dev, &addr); | |
1745 | } | |
1746 | ||
b64222a9 | 1747 | /* caller must hold RTNL */ |
20380731 | 1748 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1749 | { |
1750 | struct in6_addr addr; | |
835b474b | 1751 | |
32019e65 YH |
1752 | if (ifp->prefix_len == 127) /* RFC 6164 */ |
1753 | return; | |
1da177e4 LT |
1754 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
1755 | if (ipv6_addr_any(&addr)) | |
1756 | return; | |
1757 | __ipv6_dev_ac_dec(ifp->idev, &addr); | |
1758 | } | |
1759 | ||
073a8e0e YH |
1760 | static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) |
1761 | { | |
1762 | if (dev->addr_len != ETH_ALEN) | |
1763 | return -1; | |
1764 | memcpy(eui, dev->dev_addr, 3); | |
1765 | memcpy(eui + 5, dev->dev_addr + 3, 3); | |
1766 | ||
1767 | /* | |
1768 | * The zSeries OSA network cards can be shared among various | |
1769 | * OS instances, but the OSA cards have only one MAC address. | |
1770 | * This leads to duplicate address conflicts in conjunction | |
1771 | * with IPv6 if more than one instance uses the same card. | |
1772 | * | |
1773 | * The driver for these cards can deliver a unique 16-bit | |
1774 | * identifier for each instance sharing the same card. It is | |
1775 | * placed instead of 0xFFFE in the interface identifier. The | |
1776 | * "u" bit of the interface identifier is not inverted in this | |
1777 | * case. Hence the resulting interface identifier has local | |
1778 | * scope according to RFC2373. | |
1779 | */ | |
1780 | if (dev->dev_id) { | |
1781 | eui[3] = (dev->dev_id >> 8) & 0xFF; | |
1782 | eui[4] = dev->dev_id & 0xFF; | |
1783 | } else { | |
1784 | eui[3] = 0xFF; | |
1785 | eui[4] = 0xFE; | |
1786 | eui[0] ^= 2; | |
1787 | } | |
1788 | return 0; | |
1789 | } | |
1790 | ||
06a4c1c5 | 1791 | static int addrconf_ifid_eui64(u8 *eui, struct net_device *dev) |
1792 | { | |
1793 | if (dev->addr_len != IEEE802154_ADDR_LEN) | |
1794 | return -1; | |
1795 | memcpy(eui, dev->dev_addr, 8); | |
5e98a36e | 1796 | eui[0] ^= 2; |
06a4c1c5 | 1797 | return 0; |
1798 | } | |
1799 | ||
cb6bf355 YH |
1800 | static int addrconf_ifid_ieee1394(u8 *eui, struct net_device *dev) |
1801 | { | |
1802 | union fwnet_hwaddr *ha; | |
1803 | ||
1804 | if (dev->addr_len != FWNET_ALEN) | |
1805 | return -1; | |
1806 | ||
1807 | ha = (union fwnet_hwaddr *)dev->dev_addr; | |
1808 | ||
1809 | memcpy(eui, &ha->uc.uniq_id, sizeof(ha->uc.uniq_id)); | |
1810 | eui[0] ^= 2; | |
1811 | return 0; | |
1812 | } | |
1813 | ||
073a8e0e YH |
1814 | static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) |
1815 | { | |
1816 | /* XXX: inherit EUI-64 from other interface -- yoshfuji */ | |
1817 | if (dev->addr_len != ARCNET_ALEN) | |
1818 | return -1; | |
1819 | memset(eui, 0, 7); | |
8e5e8f30 | 1820 | eui[7] = *(u8 *)dev->dev_addr; |
073a8e0e YH |
1821 | return 0; |
1822 | } | |
1823 | ||
1824 | static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) | |
1825 | { | |
1826 | if (dev->addr_len != INFINIBAND_ALEN) | |
1827 | return -1; | |
1828 | memcpy(eui, dev->dev_addr + 12, 8); | |
1829 | eui[0] |= 2; | |
1830 | return 0; | |
1831 | } | |
1832 | ||
c61393ea | 1833 | static int __ipv6_isatap_ifid(u8 *eui, __be32 addr) |
dfd982ba | 1834 | { |
9af28511 SH |
1835 | if (addr == 0) |
1836 | return -1; | |
dfd982ba YH |
1837 | eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) || |
1838 | ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) || | |
1839 | ipv4_is_private_172(addr) || ipv4_is_test_192(addr) || | |
1840 | ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) || | |
1841 | ipv4_is_test_198(addr) || ipv4_is_multicast(addr) || | |
1842 | ipv4_is_lbcast(addr)) ? 0x00 : 0x02; | |
1843 | eui[1] = 0; | |
1844 | eui[2] = 0x5E; | |
1845 | eui[3] = 0xFE; | |
1846 | memcpy(eui + 4, &addr, 4); | |
1847 | return 0; | |
1848 | } | |
dfd982ba YH |
1849 | |
1850 | static int addrconf_ifid_sit(u8 *eui, struct net_device *dev) | |
1851 | { | |
1852 | if (dev->priv_flags & IFF_ISATAP) | |
1853 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); | |
1854 | return -1; | |
1855 | } | |
1856 | ||
aee80b54 | 1857 | static int addrconf_ifid_gre(u8 *eui, struct net_device *dev) |
1858 | { | |
1859 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); | |
1860 | } | |
1861 | ||
1da177e4 LT |
1862 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) |
1863 | { | |
6fa3eb70 S |
1864 | /* MTK_NET_CHANGES */ |
1865 | if (strncmp(dev->name, "ccmni", 2) == 0) | |
1866 | return -1; | |
1867 | ||
1da177e4 LT |
1868 | switch (dev->type) { |
1869 | case ARPHRD_ETHER: | |
1870 | case ARPHRD_FDDI: | |
073a8e0e | 1871 | return addrconf_ifid_eui48(eui, dev); |
1da177e4 | 1872 | case ARPHRD_ARCNET: |
073a8e0e | 1873 | return addrconf_ifid_arcnet(eui, dev); |
1da177e4 | 1874 | case ARPHRD_INFINIBAND: |
073a8e0e | 1875 | return addrconf_ifid_infiniband(eui, dev); |
c7dc89c0 | 1876 | case ARPHRD_SIT: |
dfd982ba | 1877 | return addrconf_ifid_sit(eui, dev); |
aee80b54 | 1878 | case ARPHRD_IPGRE: |
1879 | return addrconf_ifid_gre(eui, dev); | |
06a4c1c5 | 1880 | case ARPHRD_IEEE802154: |
1881 | return addrconf_ifid_eui64(eui, dev); | |
cb6bf355 YH |
1882 | case ARPHRD_IEEE1394: |
1883 | return addrconf_ifid_ieee1394(eui, dev); | |
1da177e4 LT |
1884 | } |
1885 | return -1; | |
1886 | } | |
1887 | ||
1888 | static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) | |
1889 | { | |
1890 | int err = -1; | |
1891 | struct inet6_ifaddr *ifp; | |
1892 | ||
1893 | read_lock_bh(&idev->lock); | |
502a2ffd | 1894 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
1da177e4 LT |
1895 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { |
1896 | memcpy(eui, ifp->addr.s6_addr+8, 8); | |
1897 | err = 0; | |
1898 | break; | |
1899 | } | |
1900 | } | |
1901 | read_unlock_bh(&idev->lock); | |
1902 | return err; | |
1903 | } | |
1904 | ||
1905 | #ifdef CONFIG_IPV6_PRIVACY | |
1906 | /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ | |
eb7e0575 | 1907 | static void __ipv6_regen_rndid(struct inet6_dev *idev) |
1da177e4 | 1908 | { |
1da177e4 | 1909 | regen: |
955189ef | 1910 | get_random_bytes(idev->rndid, sizeof(idev->rndid)); |
1da177e4 | 1911 | idev->rndid[0] &= ~0x02; |
1da177e4 LT |
1912 | |
1913 | /* | |
1914 | * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: | |
1915 | * check if generated address is not inappropriate | |
1916 | * | |
1917 | * - Reserved subnet anycast (RFC 2526) | |
1918 | * 11111101 11....11 1xxxxxxx | |
c7dc89c0 | 1919 | * - ISATAP (RFC4214) 6.1 |
1da177e4 LT |
1920 | * 00-00-5E-FE-xx-xx-xx-xx |
1921 | * - value 0 | |
1922 | * - XXX: already assigned to an address on the device | |
1923 | */ | |
1ab1457c | 1924 | if (idev->rndid[0] == 0xfd && |
1da177e4 LT |
1925 | (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && |
1926 | (idev->rndid[7]&0x80)) | |
1927 | goto regen; | |
1928 | if ((idev->rndid[0]|idev->rndid[1]) == 0) { | |
1929 | if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) | |
1930 | goto regen; | |
1931 | if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) | |
1932 | goto regen; | |
1933 | } | |
1da177e4 LT |
1934 | } |
1935 | ||
1936 | static void ipv6_regen_rndid(unsigned long data) | |
1937 | { | |
1938 | struct inet6_dev *idev = (struct inet6_dev *) data; | |
1939 | unsigned long expires; | |
1940 | ||
8814c4b5 | 1941 | rcu_read_lock_bh(); |
1da177e4 LT |
1942 | write_lock_bh(&idev->lock); |
1943 | ||
1944 | if (idev->dead) | |
1945 | goto out; | |
1946 | ||
eb7e0575 | 1947 | __ipv6_regen_rndid(idev); |
1ab1457c | 1948 | |
1da177e4 | 1949 | expires = jiffies + |
1ab1457c | 1950 | idev->cnf.temp_prefered_lft * HZ - |
784e2710 BH |
1951 | idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - |
1952 | idev->cnf.max_desync_factor * HZ; | |
1da177e4 | 1953 | if (time_before(expires, jiffies)) { |
f3213831 JP |
1954 | pr_warn("%s: too short regeneration interval; timer disabled for %s\n", |
1955 | __func__, idev->dev->name); | |
1da177e4 LT |
1956 | goto out; |
1957 | } | |
1958 | ||
1959 | if (!mod_timer(&idev->regen_timer, expires)) | |
1960 | in6_dev_hold(idev); | |
1961 | ||
1962 | out: | |
1963 | write_unlock_bh(&idev->lock); | |
8814c4b5 | 1964 | rcu_read_unlock_bh(); |
1da177e4 LT |
1965 | in6_dev_put(idev); |
1966 | } | |
1967 | ||
eb7e0575 | 1968 | static void __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) |
8e5e8f30 | 1969 | { |
1da177e4 | 1970 | if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) |
eb7e0575 | 1971 | __ipv6_regen_rndid(idev); |
1da177e4 LT |
1972 | } |
1973 | #endif | |
1974 | ||
6fa3eb70 S |
1975 | u32 addrconf_rt_table(const struct net_device *dev, u32 default_table) { |
1976 | /* Determines into what table to put autoconf PIO/RIO/default routes | |
1977 | * learned on this device. | |
1978 | * | |
1979 | * - If 0, use the same table for every device. This puts routes into | |
1980 | * one of RT_TABLE_{PREFIX,INFO,DFLT} depending on the type of route | |
1981 | * (but note that these three are currently all equal to | |
1982 | * RT6_TABLE_MAIN). | |
1983 | * - If > 0, use the specified table. | |
1984 | * - If < 0, put routes into table dev->ifindex + (-rt_table). | |
1985 | */ | |
1986 | struct inet6_dev *idev = in6_dev_get(dev); | |
1987 | u32 table; | |
1988 | int sysctl = idev->cnf.accept_ra_rt_table; | |
1989 | if (sysctl == 0) { | |
1990 | table = default_table; | |
1991 | } else if (sysctl > 0) { | |
1992 | table = (u32) sysctl; | |
1993 | } else { | |
1994 | table = (unsigned) dev->ifindex + (-sysctl); | |
1995 | } | |
1996 | in6_dev_put(idev); | |
1997 | return table; | |
1998 | } | |
1999 | ||
1da177e4 LT |
2000 | /* |
2001 | * Add prefix route. | |
2002 | */ | |
2003 | ||
2004 | static void | |
2005 | addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev, | |
e431b8c0 | 2006 | unsigned long expires, u32 flags) |
1da177e4 | 2007 | { |
86872cb5 | 2008 | struct fib6_config cfg = { |
6fa3eb70 | 2009 | .fc_table = addrconf_rt_table(dev, RT6_TABLE_PREFIX), |
86872cb5 TG |
2010 | .fc_metric = IP6_RT_PRIO_ADDRCONF, |
2011 | .fc_ifindex = dev->ifindex, | |
2012 | .fc_expires = expires, | |
2013 | .fc_dst_len = plen, | |
2014 | .fc_flags = RTF_UP | flags, | |
c346dca1 | 2015 | .fc_nlinfo.nl_net = dev_net(dev), |
f410a1fb | 2016 | .fc_protocol = RTPROT_KERNEL, |
86872cb5 | 2017 | }; |
1da177e4 | 2018 | |
4e3fd7a0 | 2019 | cfg.fc_dst = *pfx; |
1da177e4 LT |
2020 | |
2021 | /* Prevent useless cloning on PtP SIT. | |
2022 | This thing is done here expecting that the whole | |
2023 | class of non-broadcast devices need not cloning. | |
2024 | */ | |
07a93626 | 2025 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
86872cb5 TG |
2026 | if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT)) |
2027 | cfg.fc_flags |= RTF_NONEXTHOP; | |
0be669bb | 2028 | #endif |
1da177e4 | 2029 | |
86872cb5 | 2030 | ip6_route_add(&cfg); |
1da177e4 LT |
2031 | } |
2032 | ||
14ef37b6 AH |
2033 | |
2034 | static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx, | |
2035 | int plen, | |
2036 | const struct net_device *dev, | |
2037 | u32 flags, u32 noflags) | |
2038 | { | |
2039 | struct fib6_node *fn; | |
2040 | struct rt6_info *rt = NULL; | |
2041 | struct fib6_table *table; | |
2042 | ||
6fa3eb70 S |
2043 | table = fib6_get_table(dev_net(dev), |
2044 | addrconf_rt_table(dev, RT6_TABLE_PREFIX)); | |
14ef37b6 AH |
2045 | if (table == NULL) |
2046 | return NULL; | |
2047 | ||
5744dd9b | 2048 | read_lock_bh(&table->tb6_lock); |
14ef37b6 AH |
2049 | fn = fib6_locate(&table->tb6_root, pfx, plen, NULL, 0); |
2050 | if (!fn) | |
2051 | goto out; | |
2052 | for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) { | |
d1918542 | 2053 | if (rt->dst.dev->ifindex != dev->ifindex) |
14ef37b6 AH |
2054 | continue; |
2055 | if ((rt->rt6i_flags & flags) != flags) | |
2056 | continue; | |
85da53bf | 2057 | if ((rt->rt6i_flags & noflags) != 0) |
14ef37b6 AH |
2058 | continue; |
2059 | dst_hold(&rt->dst); | |
2060 | break; | |
2061 | } | |
2062 | out: | |
5744dd9b | 2063 | read_unlock_bh(&table->tb6_lock); |
14ef37b6 AH |
2064 | return rt; |
2065 | } | |
2066 | ||
2067 | ||
1da177e4 LT |
2068 | /* Create "default" multicast route to the interface */ |
2069 | ||
2070 | static void addrconf_add_mroute(struct net_device *dev) | |
2071 | { | |
86872cb5 TG |
2072 | struct fib6_config cfg = { |
2073 | .fc_table = RT6_TABLE_LOCAL, | |
2074 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
2075 | .fc_ifindex = dev->ifindex, | |
2076 | .fc_dst_len = 8, | |
2077 | .fc_flags = RTF_UP, | |
c346dca1 | 2078 | .fc_nlinfo.nl_net = dev_net(dev), |
86872cb5 TG |
2079 | }; |
2080 | ||
2081 | ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); | |
2082 | ||
2083 | ip6_route_add(&cfg); | |
1da177e4 LT |
2084 | } |
2085 | ||
07a93626 | 2086 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 LT |
2087 | static void sit_route_add(struct net_device *dev) |
2088 | { | |
86872cb5 TG |
2089 | struct fib6_config cfg = { |
2090 | .fc_table = RT6_TABLE_MAIN, | |
2091 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
2092 | .fc_ifindex = dev->ifindex, | |
2093 | .fc_dst_len = 96, | |
2094 | .fc_flags = RTF_UP | RTF_NONEXTHOP, | |
c346dca1 | 2095 | .fc_nlinfo.nl_net = dev_net(dev), |
86872cb5 | 2096 | }; |
1da177e4 LT |
2097 | |
2098 | /* prefix length - 96 bits "::d.d.d.d" */ | |
86872cb5 | 2099 | ip6_route_add(&cfg); |
1da177e4 | 2100 | } |
0be669bb | 2101 | #endif |
1da177e4 | 2102 | |
1da177e4 LT |
2103 | static struct inet6_dev *addrconf_add_dev(struct net_device *dev) |
2104 | { | |
2105 | struct inet6_dev *idev; | |
2106 | ||
2107 | ASSERT_RTNL(); | |
2108 | ||
e21e8467 SH |
2109 | idev = ipv6_find_idev(dev); |
2110 | if (!idev) | |
64e724f6 BH |
2111 | return ERR_PTR(-ENOBUFS); |
2112 | ||
2113 | if (idev->cnf.disable_ipv6) | |
2114 | return ERR_PTR(-EACCES); | |
1da177e4 LT |
2115 | |
2116 | /* Add default multicast route */ | |
4af04aba LW |
2117 | if (!(dev->flags & IFF_LOOPBACK)) |
2118 | addrconf_add_mroute(dev); | |
1da177e4 | 2119 | |
1da177e4 LT |
2120 | return idev; |
2121 | } | |
2122 | ||
e6bff995 | 2123 | void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao) |
1da177e4 LT |
2124 | { |
2125 | struct prefix_info *pinfo; | |
2126 | __u32 valid_lft; | |
2127 | __u32 prefered_lft; | |
2128 | int addr_type; | |
1da177e4 | 2129 | struct inet6_dev *in6_dev; |
56d417b1 | 2130 | struct net *net = dev_net(dev); |
1da177e4 LT |
2131 | |
2132 | pinfo = (struct prefix_info *) opt; | |
1ab1457c | 2133 | |
1da177e4 LT |
2134 | if (len < sizeof(struct prefix_info)) { |
2135 | ADBG(("addrconf: prefix option too short\n")); | |
2136 | return; | |
2137 | } | |
1ab1457c | 2138 | |
1da177e4 LT |
2139 | /* |
2140 | * Validation checks ([ADDRCONF], page 19) | |
2141 | */ | |
2142 | ||
2143 | addr_type = ipv6_addr_type(&pinfo->prefix); | |
2144 | ||
2145 | if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) | |
2146 | return; | |
2147 | ||
2148 | valid_lft = ntohl(pinfo->valid); | |
2149 | prefered_lft = ntohl(pinfo->prefered); | |
2150 | ||
2151 | if (prefered_lft > valid_lft) { | |
e87cc472 | 2152 | net_warn_ratelimited("addrconf: prefix option has invalid lifetime\n"); |
1da177e4 LT |
2153 | return; |
2154 | } | |
2155 | ||
2156 | in6_dev = in6_dev_get(dev); | |
2157 | ||
2158 | if (in6_dev == NULL) { | |
e87cc472 JP |
2159 | net_dbg_ratelimited("addrconf: device %s not configured\n", |
2160 | dev->name); | |
1da177e4 LT |
2161 | return; |
2162 | } | |
2163 | ||
2164 | /* | |
2165 | * Two things going on here: | |
2166 | * 1) Add routes for on-link prefixes | |
2167 | * 2) Configure prefixes with the auto flag set | |
2168 | */ | |
2169 | ||
4bed72e4 YH |
2170 | if (pinfo->onlink) { |
2171 | struct rt6_info *rt; | |
2172 | unsigned long rt_expires; | |
2173 | ||
6f704992 YH |
2174 | /* Avoid arithmetic overflow. Really, we could |
2175 | * save rt_expires in seconds, likely valid_lft, | |
2176 | * but it would require division in fib gc, that it | |
2177 | * not good. | |
2178 | */ | |
4bed72e4 YH |
2179 | if (HZ > USER_HZ) |
2180 | rt_expires = addrconf_timeout_fixup(valid_lft, HZ); | |
2181 | else | |
2182 | rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ); | |
3dd4bc68 | 2183 | |
4bed72e4 YH |
2184 | if (addrconf_finite_timeout(rt_expires)) |
2185 | rt_expires *= HZ; | |
1da177e4 | 2186 | |
14ef37b6 AH |
2187 | rt = addrconf_get_prefix_route(&pinfo->prefix, |
2188 | pinfo->prefix_len, | |
2189 | dev, | |
2190 | RTF_ADDRCONF | RTF_PREFIX_RT, | |
2191 | RTF_GATEWAY | RTF_DEFAULT); | |
1da177e4 | 2192 | |
14ef37b6 | 2193 | if (rt) { |
6f704992 YH |
2194 | /* Autoconf prefix route */ |
2195 | if (valid_lft == 0) { | |
2196 | ip6_del_rt(rt); | |
2197 | rt = NULL; | |
4bed72e4 | 2198 | } else if (addrconf_finite_timeout(rt_expires)) { |
6f704992 | 2199 | /* not infinity */ |
1716a961 | 2200 | rt6_set_expires(rt, jiffies + rt_expires); |
6f704992 | 2201 | } else { |
1716a961 | 2202 | rt6_clean_expires(rt); |
1da177e4 LT |
2203 | } |
2204 | } else if (valid_lft) { | |
6f704992 | 2205 | clock_t expires = 0; |
4bed72e4 YH |
2206 | int flags = RTF_ADDRCONF | RTF_PREFIX_RT; |
2207 | if (addrconf_finite_timeout(rt_expires)) { | |
6f704992 YH |
2208 | /* not infinity */ |
2209 | flags |= RTF_EXPIRES; | |
2210 | expires = jiffies_to_clock_t(rt_expires); | |
2211 | } | |
1da177e4 | 2212 | addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, |
6f704992 | 2213 | dev, expires, flags); |
1da177e4 | 2214 | } |
94e187c0 | 2215 | ip6_rt_put(rt); |
1da177e4 LT |
2216 | } |
2217 | ||
2218 | /* Try to figure out our local address for this prefix */ | |
2219 | ||
2220 | if (pinfo->autoconf && in6_dev->cnf.autoconf) { | |
8e5e8f30 | 2221 | struct inet6_ifaddr *ifp; |
1da177e4 LT |
2222 | struct in6_addr addr; |
2223 | int create = 0, update_lft = 0; | |
617fe29d | 2224 | bool tokenized = false; |
1da177e4 LT |
2225 | |
2226 | if (pinfo->prefix_len == 64) { | |
2227 | memcpy(&addr, &pinfo->prefix, 8); | |
f53adae4 DB |
2228 | |
2229 | if (!ipv6_addr_any(&in6_dev->token)) { | |
2230 | read_lock_bh(&in6_dev->lock); | |
2231 | memcpy(addr.s6_addr + 8, | |
2232 | in6_dev->token.s6_addr + 8, 8); | |
2233 | read_unlock_bh(&in6_dev->lock); | |
617fe29d | 2234 | tokenized = true; |
f53adae4 DB |
2235 | } else if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && |
2236 | ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { | |
1da177e4 LT |
2237 | in6_dev_put(in6_dev); |
2238 | return; | |
2239 | } | |
2240 | goto ok; | |
2241 | } | |
e87cc472 JP |
2242 | net_dbg_ratelimited("IPv6 addrconf: prefix with wrong length %d\n", |
2243 | pinfo->prefix_len); | |
1da177e4 LT |
2244 | in6_dev_put(in6_dev); |
2245 | return; | |
2246 | ||
2247 | ok: | |
2248 | ||
53b7997f | 2249 | ifp = ipv6_get_ifaddr(net, &addr, dev, 1); |
1da177e4 LT |
2250 | |
2251 | if (ifp == NULL && valid_lft) { | |
2252 | int max_addresses = in6_dev->cnf.max_addresses; | |
95c385b4 NH |
2253 | u32 addr_flags = 0; |
2254 | ||
2255 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
2256 | if (in6_dev->cnf.optimistic_dad && | |
e6bff995 | 2257 | !net->ipv6.devconf_all->forwarding && sllao) |
95c385b4 NH |
2258 | addr_flags = IFA_F_OPTIMISTIC; |
2259 | #endif | |
1da177e4 LT |
2260 | |
2261 | /* Do not allow to create too much of autoconfigured | |
2262 | * addresses; this would be too easy way to crash kernel. | |
2263 | */ | |
2264 | if (!max_addresses || | |
2265 | ipv6_count_addresses(in6_dev) < max_addresses) | |
2266 | ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len, | |
95c385b4 NH |
2267 | addr_type&IPV6_ADDR_SCOPE_MASK, |
2268 | addr_flags); | |
1da177e4 | 2269 | |
3f0d2ba0 | 2270 | if (IS_ERR_OR_NULL(ifp)) { |
1da177e4 LT |
2271 | in6_dev_put(in6_dev); |
2272 | return; | |
2273 | } | |
2274 | ||
2275 | update_lft = create = 1; | |
2276 | ifp->cstamp = jiffies; | |
617fe29d | 2277 | ifp->tokenized = tokenized; |
cf22f9a2 | 2278 | addrconf_dad_start(ifp); |
1da177e4 LT |
2279 | } |
2280 | ||
2281 | if (ifp) { | |
2282 | int flags; | |
2283 | unsigned long now; | |
2284 | #ifdef CONFIG_IPV6_PRIVACY | |
2285 | struct inet6_ifaddr *ift; | |
2286 | #endif | |
2287 | u32 stored_lft; | |
2288 | ||
2289 | /* update lifetime (RFC2462 5.5.3 e) */ | |
2290 | spin_lock(&ifp->lock); | |
2291 | now = jiffies; | |
2292 | if (ifp->valid_lft > (now - ifp->tstamp) / HZ) | |
2293 | stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; | |
2294 | else | |
2295 | stored_lft = 0; | |
2296 | if (!update_lft && stored_lft) { | |
2297 | if (valid_lft > MIN_VALID_LIFETIME || | |
2298 | valid_lft > stored_lft) | |
2299 | update_lft = 1; | |
2300 | else if (stored_lft <= MIN_VALID_LIFETIME) { | |
2301 | /* valid_lft <= stored_lft is always true */ | |
a1ed0526 BH |
2302 | /* |
2303 | * RFC 4862 Section 5.5.3e: | |
2304 | * "Note that the preferred lifetime of | |
2305 | * the corresponding address is always | |
2306 | * reset to the Preferred Lifetime in | |
2307 | * the received Prefix Information | |
2308 | * option, regardless of whether the | |
2309 | * valid lifetime is also reset or | |
2310 | * ignored." | |
2311 | * | |
2312 | * So if the preferred lifetime in | |
2313 | * this advertisement is different | |
2314 | * than what we have stored, but the | |
2315 | * valid lifetime is invalid, just | |
2316 | * reset prefered_lft. | |
2317 | * | |
2318 | * We must set the valid lifetime | |
2319 | * to the stored lifetime since we'll | |
2320 | * be updating the timestamp below, | |
2321 | * else we'll set it back to the | |
25985edc | 2322 | * minimum. |
a1ed0526 BH |
2323 | */ |
2324 | if (prefered_lft != ifp->prefered_lft) { | |
2325 | valid_lft = stored_lft; | |
2326 | update_lft = 1; | |
2327 | } | |
1da177e4 LT |
2328 | } else { |
2329 | valid_lft = MIN_VALID_LIFETIME; | |
2330 | if (valid_lft < prefered_lft) | |
2331 | prefered_lft = valid_lft; | |
2332 | update_lft = 1; | |
2333 | } | |
2334 | } | |
2335 | ||
2336 | if (update_lft) { | |
2337 | ifp->valid_lft = valid_lft; | |
2338 | ifp->prefered_lft = prefered_lft; | |
2339 | ifp->tstamp = now; | |
2340 | flags = ifp->flags; | |
2341 | ifp->flags &= ~IFA_F_DEPRECATED; | |
2342 | spin_unlock(&ifp->lock); | |
2343 | ||
2344 | if (!(flags&IFA_F_TENTATIVE)) | |
2345 | ipv6_ifa_notify(0, ifp); | |
2346 | } else | |
2347 | spin_unlock(&ifp->lock); | |
2348 | ||
2349 | #ifdef CONFIG_IPV6_PRIVACY | |
2350 | read_lock_bh(&in6_dev->lock); | |
2351 | /* update all temporary addresses in the list */ | |
76f793e3 LC |
2352 | list_for_each_entry(ift, &in6_dev->tempaddr_list, |
2353 | tmp_list) { | |
2354 | int age, max_valid, max_prefered; | |
2355 | ||
c6fbfac2 BB |
2356 | if (ifp != ift->ifpub) |
2357 | continue; | |
2358 | ||
76f793e3 LC |
2359 | /* |
2360 | * RFC 4941 section 3.3: | |
2361 | * If a received option will extend the lifetime | |
2362 | * of a public address, the lifetimes of | |
2363 | * temporary addresses should be extended, | |
2364 | * subject to the overall constraint that no | |
2365 | * temporary addresses should ever remain | |
2366 | * "valid" or "preferred" for a time longer than | |
2367 | * (TEMP_VALID_LIFETIME) or | |
2368 | * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR), | |
2369 | * respectively. | |
2370 | */ | |
2371 | age = (now - ift->cstamp) / HZ; | |
2372 | max_valid = in6_dev->cnf.temp_valid_lft - age; | |
2373 | if (max_valid < 0) | |
2374 | max_valid = 0; | |
2375 | ||
2376 | max_prefered = in6_dev->cnf.temp_prefered_lft - | |
2377 | in6_dev->cnf.max_desync_factor - | |
2378 | age; | |
2379 | if (max_prefered < 0) | |
2380 | max_prefered = 0; | |
2381 | ||
2382 | if (valid_lft > max_valid) | |
2383 | valid_lft = max_valid; | |
2384 | ||
2385 | if (prefered_lft > max_prefered) | |
2386 | prefered_lft = max_prefered; | |
2387 | ||
1da177e4 LT |
2388 | spin_lock(&ift->lock); |
2389 | flags = ift->flags; | |
76f793e3 LC |
2390 | ift->valid_lft = valid_lft; |
2391 | ift->prefered_lft = prefered_lft; | |
2392 | ift->tstamp = now; | |
2393 | if (prefered_lft > 0) | |
2394 | ift->flags &= ~IFA_F_DEPRECATED; | |
2395 | ||
1da177e4 LT |
2396 | spin_unlock(&ift->lock); |
2397 | if (!(flags&IFA_F_TENTATIVE)) | |
2398 | ipv6_ifa_notify(0, ift); | |
2399 | } | |
2400 | ||
aed65501 | 2401 | if ((create || list_empty(&in6_dev->tempaddr_list)) && in6_dev->cnf.use_tempaddr > 0) { |
1da177e4 | 2402 | /* |
76f793e3 LC |
2403 | * When a new public address is created as |
2404 | * described in [ADDRCONF], also create a new | |
2405 | * temporary address. Also create a temporary | |
2406 | * address if it's enabled but no temporary | |
2407 | * address currently exists. | |
1da177e4 | 2408 | */ |
1ab1457c | 2409 | read_unlock_bh(&in6_dev->lock); |
1da177e4 LT |
2410 | ipv6_create_tempaddr(ifp, NULL); |
2411 | } else { | |
2412 | read_unlock_bh(&in6_dev->lock); | |
2413 | } | |
2414 | #endif | |
2415 | in6_ifa_put(ifp); | |
835b474b | 2416 | addrconf_verify(); |
1da177e4 LT |
2417 | } |
2418 | } | |
2419 | inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); | |
2420 | in6_dev_put(in6_dev); | |
2421 | } | |
2422 | ||
2423 | /* | |
2424 | * Set destination address. | |
2425 | * Special case for SIT interfaces where we create a new "virtual" | |
2426 | * device. | |
2427 | */ | |
af284937 | 2428 | int addrconf_set_dstaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2429 | { |
2430 | struct in6_ifreq ireq; | |
2431 | struct net_device *dev; | |
2432 | int err = -EINVAL; | |
2433 | ||
2434 | rtnl_lock(); | |
2435 | ||
2436 | err = -EFAULT; | |
2437 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2438 | goto err_exit; | |
2439 | ||
af284937 | 2440 | dev = __dev_get_by_index(net, ireq.ifr6_ifindex); |
1da177e4 LT |
2441 | |
2442 | err = -ENODEV; | |
2443 | if (dev == NULL) | |
2444 | goto err_exit; | |
2445 | ||
07a93626 | 2446 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 | 2447 | if (dev->type == ARPHRD_SIT) { |
5bc3eb7e | 2448 | const struct net_device_ops *ops = dev->netdev_ops; |
1da177e4 | 2449 | struct ifreq ifr; |
1da177e4 LT |
2450 | struct ip_tunnel_parm p; |
2451 | ||
2452 | err = -EADDRNOTAVAIL; | |
2453 | if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) | |
2454 | goto err_exit; | |
2455 | ||
2456 | memset(&p, 0, sizeof(p)); | |
2457 | p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; | |
2458 | p.iph.saddr = 0; | |
2459 | p.iph.version = 4; | |
2460 | p.iph.ihl = 5; | |
2461 | p.iph.protocol = IPPROTO_IPV6; | |
2462 | p.iph.ttl = 64; | |
d20b3109 | 2463 | ifr.ifr_ifru.ifru_data = (__force void __user *)&p; |
1da177e4 | 2464 | |
5bc3eb7e SH |
2465 | if (ops->ndo_do_ioctl) { |
2466 | mm_segment_t oldfs = get_fs(); | |
2467 | ||
2468 | set_fs(KERNEL_DS); | |
2469 | err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL); | |
2470 | set_fs(oldfs); | |
2471 | } else | |
2472 | err = -EOPNOTSUPP; | |
1da177e4 LT |
2473 | |
2474 | if (err == 0) { | |
2475 | err = -ENOBUFS; | |
af284937 DL |
2476 | dev = __dev_get_by_name(net, p.name); |
2477 | if (!dev) | |
1da177e4 LT |
2478 | goto err_exit; |
2479 | err = dev_open(dev); | |
2480 | } | |
2481 | } | |
0be669bb | 2482 | #endif |
1da177e4 LT |
2483 | |
2484 | err_exit: | |
2485 | rtnl_unlock(); | |
2486 | return err; | |
2487 | } | |
2488 | ||
2489 | /* | |
2490 | * Manual configuration of address on an interface | |
2491 | */ | |
b71d1d42 | 2492 | static int inet6_addr_add(struct net *net, int ifindex, const struct in6_addr *pfx, |
24ef0da7 | 2493 | unsigned int plen, __u8 ifa_flags, __u32 prefered_lft, |
af284937 | 2494 | __u32 valid_lft) |
1da177e4 LT |
2495 | { |
2496 | struct inet6_ifaddr *ifp; | |
2497 | struct inet6_dev *idev; | |
2498 | struct net_device *dev; | |
2499 | int scope; | |
6f704992 YH |
2500 | u32 flags; |
2501 | clock_t expires; | |
4bed72e4 | 2502 | unsigned long timeout; |
1da177e4 LT |
2503 | |
2504 | ASSERT_RTNL(); | |
1ab1457c | 2505 | |
24ef0da7 TG |
2506 | if (plen > 128) |
2507 | return -EINVAL; | |
2508 | ||
0778769d NT |
2509 | /* check the lifetime */ |
2510 | if (!valid_lft || prefered_lft > valid_lft) | |
2511 | return -EINVAL; | |
2512 | ||
af284937 DL |
2513 | dev = __dev_get_by_index(net, ifindex); |
2514 | if (!dev) | |
1da177e4 | 2515 | return -ENODEV; |
1ab1457c | 2516 | |
64e724f6 BH |
2517 | idev = addrconf_add_dev(dev); |
2518 | if (IS_ERR(idev)) | |
2519 | return PTR_ERR(idev); | |
1da177e4 LT |
2520 | |
2521 | scope = ipv6_addr_scope(pfx); | |
2522 | ||
4bed72e4 YH |
2523 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
2524 | if (addrconf_finite_timeout(timeout)) { | |
2525 | expires = jiffies_to_clock_t(timeout * HZ); | |
2526 | valid_lft = timeout; | |
6f704992 | 2527 | flags = RTF_EXPIRES; |
4bed72e4 YH |
2528 | } else { |
2529 | expires = 0; | |
2530 | flags = 0; | |
2531 | ifa_flags |= IFA_F_PERMANENT; | |
6f704992 | 2532 | } |
0778769d | 2533 | |
4bed72e4 YH |
2534 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
2535 | if (addrconf_finite_timeout(timeout)) { | |
2536 | if (timeout == 0) | |
2537 | ifa_flags |= IFA_F_DEPRECATED; | |
2538 | prefered_lft = timeout; | |
2539 | } | |
0778769d NT |
2540 | |
2541 | ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags); | |
2542 | ||
1da177e4 | 2543 | if (!IS_ERR(ifp)) { |
06aebfb7 | 2544 | spin_lock_bh(&ifp->lock); |
0778769d NT |
2545 | ifp->valid_lft = valid_lft; |
2546 | ifp->prefered_lft = prefered_lft; | |
2547 | ifp->tstamp = jiffies; | |
06aebfb7 | 2548 | spin_unlock_bh(&ifp->lock); |
0778769d | 2549 | |
46d48046 | 2550 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, |
6f704992 | 2551 | expires, flags); |
95c385b4 NH |
2552 | /* |
2553 | * Note that section 3.1 of RFC 4429 indicates | |
2554 | * that the Optimistic flag should not be set for | |
2555 | * manually configured addresses | |
2556 | */ | |
cf22f9a2 | 2557 | addrconf_dad_start(ifp); |
1da177e4 | 2558 | in6_ifa_put(ifp); |
835b474b | 2559 | addrconf_verify_rtnl(); |
1da177e4 LT |
2560 | return 0; |
2561 | } | |
2562 | ||
2563 | return PTR_ERR(ifp); | |
2564 | } | |
2565 | ||
b71d1d42 | 2566 | static int inet6_addr_del(struct net *net, int ifindex, const struct in6_addr *pfx, |
24ef0da7 | 2567 | unsigned int plen) |
1da177e4 LT |
2568 | { |
2569 | struct inet6_ifaddr *ifp; | |
2570 | struct inet6_dev *idev; | |
2571 | struct net_device *dev; | |
1ab1457c | 2572 | |
24ef0da7 TG |
2573 | if (plen > 128) |
2574 | return -EINVAL; | |
2575 | ||
af284937 DL |
2576 | dev = __dev_get_by_index(net, ifindex); |
2577 | if (!dev) | |
1da177e4 LT |
2578 | return -ENODEV; |
2579 | ||
2580 | if ((idev = __in6_dev_get(dev)) == NULL) | |
2581 | return -ENXIO; | |
2582 | ||
2583 | read_lock_bh(&idev->lock); | |
502a2ffd | 2584 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
1da177e4 LT |
2585 | if (ifp->prefix_len == plen && |
2586 | ipv6_addr_equal(pfx, &ifp->addr)) { | |
2587 | in6_ifa_hold(ifp); | |
2588 | read_unlock_bh(&idev->lock); | |
1ab1457c | 2589 | |
1da177e4 LT |
2590 | ipv6_del_addr(ifp); |
2591 | ||
2592 | /* If the last address is deleted administratively, | |
2593 | disable IPv6 on this interface. | |
2594 | */ | |
502a2ffd | 2595 | if (list_empty(&idev->addr_list)) |
1da177e4 LT |
2596 | addrconf_ifdown(idev->dev, 1); |
2597 | return 0; | |
2598 | } | |
2599 | } | |
2600 | read_unlock_bh(&idev->lock); | |
2601 | return -EADDRNOTAVAIL; | |
2602 | } | |
2603 | ||
2604 | ||
af284937 | 2605 | int addrconf_add_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2606 | { |
2607 | struct in6_ifreq ireq; | |
2608 | int err; | |
1ab1457c | 2609 | |
af31f412 | 2610 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 | 2611 | return -EPERM; |
1ab1457c | 2612 | |
1da177e4 LT |
2613 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
2614 | return -EFAULT; | |
2615 | ||
2616 | rtnl_lock(); | |
af284937 DL |
2617 | err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, |
2618 | ireq.ifr6_prefixlen, IFA_F_PERMANENT, | |
2619 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); | |
1da177e4 LT |
2620 | rtnl_unlock(); |
2621 | return err; | |
2622 | } | |
2623 | ||
af284937 | 2624 | int addrconf_del_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2625 | { |
2626 | struct in6_ifreq ireq; | |
2627 | int err; | |
1ab1457c | 2628 | |
af31f412 | 2629 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 LT |
2630 | return -EPERM; |
2631 | ||
2632 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2633 | return -EFAULT; | |
2634 | ||
2635 | rtnl_lock(); | |
af284937 DL |
2636 | err = inet6_addr_del(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, |
2637 | ireq.ifr6_prefixlen); | |
1da177e4 LT |
2638 | rtnl_unlock(); |
2639 | return err; | |
2640 | } | |
2641 | ||
b5f348e5 IJ |
2642 | static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr, |
2643 | int plen, int scope) | |
2644 | { | |
2645 | struct inet6_ifaddr *ifp; | |
2646 | ||
2647 | ifp = ipv6_add_addr(idev, addr, plen, scope, IFA_F_PERMANENT); | |
2648 | if (!IS_ERR(ifp)) { | |
2649 | spin_lock_bh(&ifp->lock); | |
2650 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2651 | spin_unlock_bh(&ifp->lock); | |
2652 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2653 | in6_ifa_put(ifp); | |
2654 | } | |
2655 | } | |
2656 | ||
07a93626 | 2657 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 LT |
2658 | static void sit_add_v4_addrs(struct inet6_dev *idev) |
2659 | { | |
1da177e4 LT |
2660 | struct in6_addr addr; |
2661 | struct net_device *dev; | |
c346dca1 | 2662 | struct net *net = dev_net(idev->dev); |
1da177e4 LT |
2663 | int scope; |
2664 | ||
2665 | ASSERT_RTNL(); | |
2666 | ||
2667 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2668 | memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); | |
2669 | ||
2670 | if (idev->dev->flags&IFF_POINTOPOINT) { | |
2671 | addr.s6_addr32[0] = htonl(0xfe800000); | |
2672 | scope = IFA_LINK; | |
2673 | } else { | |
2674 | scope = IPV6_ADDR_COMPATv4; | |
2675 | } | |
2676 | ||
2677 | if (addr.s6_addr32[3]) { | |
b5f348e5 | 2678 | add_addr(idev, &addr, 128, scope); |
1da177e4 LT |
2679 | return; |
2680 | } | |
2681 | ||
6fda7350 | 2682 | for_each_netdev(net, dev) { |
8e5e8f30 | 2683 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
1da177e4 | 2684 | if (in_dev && (dev->flags & IFF_UP)) { |
8e5e8f30 | 2685 | struct in_ifaddr *ifa; |
1da177e4 LT |
2686 | |
2687 | int flag = scope; | |
2688 | ||
2689 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { | |
2690 | int plen; | |
2691 | ||
2692 | addr.s6_addr32[3] = ifa->ifa_local; | |
2693 | ||
2694 | if (ifa->ifa_scope == RT_SCOPE_LINK) | |
2695 | continue; | |
2696 | if (ifa->ifa_scope >= RT_SCOPE_HOST) { | |
2697 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2698 | continue; | |
2699 | flag |= IFA_HOST; | |
2700 | } | |
2701 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2702 | plen = 64; | |
2703 | else | |
2704 | plen = 96; | |
2705 | ||
b5f348e5 | 2706 | add_addr(idev, &addr, plen, flag); |
1da177e4 LT |
2707 | } |
2708 | } | |
1ab1457c | 2709 | } |
1da177e4 | 2710 | } |
0be669bb | 2711 | #endif |
1da177e4 LT |
2712 | |
2713 | static void init_loopback(struct net_device *dev) | |
2714 | { | |
2715 | struct inet6_dev *idev; | |
25fb6ca4 BK |
2716 | struct net_device *sp_dev; |
2717 | struct inet6_ifaddr *sp_ifa; | |
2718 | struct rt6_info *sp_rt; | |
1da177e4 LT |
2719 | |
2720 | /* ::1 */ | |
2721 | ||
2722 | ASSERT_RTNL(); | |
2723 | ||
2724 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
91df42be | 2725 | pr_debug("%s: add_dev failed\n", __func__); |
1da177e4 LT |
2726 | return; |
2727 | } | |
2728 | ||
b5f348e5 | 2729 | add_addr(idev, &in6addr_loopback, 128, IFA_HOST); |
25fb6ca4 BK |
2730 | |
2731 | /* Add routes to other interface's IPv6 addresses */ | |
2732 | for_each_netdev(dev_net(dev), sp_dev) { | |
2733 | if (!strcmp(sp_dev->name, dev->name)) | |
2734 | continue; | |
2735 | ||
2736 | idev = __in6_dev_get(sp_dev); | |
2737 | if (!idev) | |
2738 | continue; | |
2739 | ||
2740 | read_lock_bh(&idev->lock); | |
2741 | list_for_each_entry(sp_ifa, &idev->addr_list, if_list) { | |
2742 | ||
2743 | if (sp_ifa->flags & (IFA_F_DADFAILED | IFA_F_TENTATIVE)) | |
2744 | continue; | |
2745 | ||
8eb99ef8 G |
2746 | if (sp_ifa->rt) { |
2747 | /* This dst has been added to garbage list when | |
2748 | * lo device down, release this obsolete dst and | |
2749 | * reallocate a new router for ifa. | |
2750 | */ | |
14ba02f9 | 2751 | if (!atomic_read(&sp_ifa->rt->rt6i_ref)) { |
8eb99ef8 G |
2752 | ip6_rt_put(sp_ifa->rt); |
2753 | sp_ifa->rt = NULL; | |
2754 | } else { | |
2755 | continue; | |
2756 | } | |
2757 | } | |
a881ae1f | 2758 | |
25fb6ca4 BK |
2759 | sp_rt = addrconf_dst_alloc(idev, &sp_ifa->addr, 0); |
2760 | ||
2761 | /* Failure cases are ignored */ | |
534c8779 G |
2762 | if (!IS_ERR(sp_rt)) { |
2763 | sp_ifa->rt = sp_rt; | |
25fb6ca4 | 2764 | ip6_ins_rt(sp_rt); |
534c8779 | 2765 | } |
25fb6ca4 BK |
2766 | } |
2767 | read_unlock_bh(&idev->lock); | |
2768 | } | |
1da177e4 LT |
2769 | } |
2770 | ||
b71d1d42 | 2771 | static void addrconf_add_linklocal(struct inet6_dev *idev, const struct in6_addr *addr) |
1da177e4 | 2772 | { |
8e5e8f30 | 2773 | struct inet6_ifaddr *ifp; |
95c385b4 NH |
2774 | u32 addr_flags = IFA_F_PERMANENT; |
2775 | ||
2776 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
2777 | if (idev->cnf.optimistic_dad && | |
702beb87 | 2778 | !dev_net(idev->dev)->ipv6.devconf_all->forwarding) |
95c385b4 NH |
2779 | addr_flags |= IFA_F_OPTIMISTIC; |
2780 | #endif | |
1da177e4 | 2781 | |
95c385b4 NH |
2782 | |
2783 | ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, addr_flags); | |
1da177e4 | 2784 | if (!IS_ERR(ifp)) { |
46d48046 | 2785 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0); |
cf22f9a2 | 2786 | addrconf_dad_start(ifp); |
1da177e4 LT |
2787 | in6_ifa_put(ifp); |
2788 | } | |
2789 | } | |
2790 | ||
2791 | static void addrconf_dev_config(struct net_device *dev) | |
2792 | { | |
2793 | struct in6_addr addr; | |
8e5e8f30 | 2794 | struct inet6_dev *idev; |
1da177e4 LT |
2795 | |
2796 | ASSERT_RTNL(); | |
2797 | ||
74235a25 HX |
2798 | if ((dev->type != ARPHRD_ETHER) && |
2799 | (dev->type != ARPHRD_FDDI) && | |
74235a25 | 2800 | (dev->type != ARPHRD_ARCNET) && |
06a4c1c5 | 2801 | (dev->type != ARPHRD_INFINIBAND) && |
cb6bf355 YH |
2802 | (dev->type != ARPHRD_IEEE802154) && |
2803 | (dev->type != ARPHRD_IEEE1394)) { | |
74235a25 HX |
2804 | /* Alas, we support only Ethernet autoconfiguration. */ |
2805 | return; | |
2806 | } | |
2807 | ||
1da177e4 | 2808 | idev = addrconf_add_dev(dev); |
64e724f6 | 2809 | if (IS_ERR(idev)) |
1da177e4 LT |
2810 | return; |
2811 | ||
2812 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2813 | addr.s6_addr32[0] = htonl(0xFE800000); | |
2814 | ||
2815 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0) | |
2816 | addrconf_add_linklocal(idev, &addr); | |
2817 | } | |
2818 | ||
07a93626 | 2819 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 LT |
2820 | static void addrconf_sit_config(struct net_device *dev) |
2821 | { | |
2822 | struct inet6_dev *idev; | |
2823 | ||
2824 | ASSERT_RTNL(); | |
2825 | ||
1ab1457c YH |
2826 | /* |
2827 | * Configure the tunnel with one of our IPv4 | |
2828 | * addresses... we should configure all of | |
1da177e4 LT |
2829 | * our v4 addrs in the tunnel |
2830 | */ | |
2831 | ||
2832 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
91df42be | 2833 | pr_debug("%s: add_dev failed\n", __func__); |
1da177e4 LT |
2834 | return; |
2835 | } | |
2836 | ||
c7dc89c0 FT |
2837 | if (dev->priv_flags & IFF_ISATAP) { |
2838 | struct in6_addr addr; | |
2839 | ||
2840 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
2841 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
2842 | if (!ipv6_generate_eui64(addr.s6_addr + 8, dev)) | |
2843 | addrconf_add_linklocal(idev, &addr); | |
2844 | return; | |
2845 | } | |
2846 | ||
1da177e4 LT |
2847 | sit_add_v4_addrs(idev); |
2848 | ||
62b54dd9 | 2849 | if (dev->flags&IFF_POINTOPOINT) |
1da177e4 | 2850 | addrconf_add_mroute(dev); |
62b54dd9 | 2851 | else |
1da177e4 LT |
2852 | sit_route_add(dev); |
2853 | } | |
0be669bb | 2854 | #endif |
1da177e4 | 2855 | |
07a93626 | 2856 | #if IS_ENABLED(CONFIG_NET_IPGRE) |
aee80b54 | 2857 | static void addrconf_gre_config(struct net_device *dev) |
2858 | { | |
2859 | struct inet6_dev *idev; | |
2860 | struct in6_addr addr; | |
2861 | ||
f3213831 | 2862 | pr_info("%s(%s)\n", __func__, dev->name); |
aee80b54 | 2863 | |
2864 | ASSERT_RTNL(); | |
2865 | ||
2866 | if ((idev = ipv6_find_idev(dev)) == NULL) { | |
91df42be | 2867 | pr_debug("%s: add_dev failed\n", __func__); |
aee80b54 | 2868 | return; |
2869 | } | |
2870 | ||
2871 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
2872 | addrconf_prefix_route(&addr, 64, dev, 0, 0); | |
2873 | ||
2874 | if (!ipv6_generate_eui64(addr.s6_addr + 8, dev)) | |
2875 | addrconf_add_linklocal(idev, &addr); | |
2876 | } | |
2877 | #endif | |
2878 | ||
1da177e4 LT |
2879 | static inline int |
2880 | ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev) | |
2881 | { | |
2882 | struct in6_addr lladdr; | |
2883 | ||
95c385b4 | 2884 | if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) { |
1da177e4 LT |
2885 | addrconf_add_linklocal(idev, &lladdr); |
2886 | return 0; | |
2887 | } | |
2888 | return -1; | |
2889 | } | |
2890 | ||
2891 | static void ip6_tnl_add_linklocal(struct inet6_dev *idev) | |
2892 | { | |
2893 | struct net_device *link_dev; | |
c346dca1 | 2894 | struct net *net = dev_net(idev->dev); |
1da177e4 LT |
2895 | |
2896 | /* first try to inherit the link-local address from the link device */ | |
2897 | if (idev->dev->iflink && | |
6fda7350 | 2898 | (link_dev = __dev_get_by_index(net, idev->dev->iflink))) { |
1da177e4 LT |
2899 | if (!ipv6_inherit_linklocal(idev, link_dev)) |
2900 | return; | |
2901 | } | |
2902 | /* then try to inherit it from any device */ | |
6fda7350 | 2903 | for_each_netdev(net, link_dev) { |
1da177e4 LT |
2904 | if (!ipv6_inherit_linklocal(idev, link_dev)) |
2905 | return; | |
2906 | } | |
91df42be | 2907 | pr_debug("init ip6-ip6: add_linklocal failed\n"); |
1da177e4 LT |
2908 | } |
2909 | ||
2910 | /* | |
2911 | * Autoconfigure tunnel with a link-local address so routing protocols, | |
2912 | * DHCPv6, MLD etc. can be run over the virtual link | |
2913 | */ | |
2914 | ||
2915 | static void addrconf_ip6_tnl_config(struct net_device *dev) | |
2916 | { | |
2917 | struct inet6_dev *idev; | |
2918 | ||
2919 | ASSERT_RTNL(); | |
2920 | ||
e21e8467 | 2921 | idev = addrconf_add_dev(dev); |
64e724f6 | 2922 | if (IS_ERR(idev)) { |
91df42be | 2923 | pr_debug("init ip6-ip6: add_dev failed\n"); |
1da177e4 LT |
2924 | return; |
2925 | } | |
2926 | ip6_tnl_add_linklocal(idev); | |
1da177e4 LT |
2927 | } |
2928 | ||
1ab1457c | 2929 | static int addrconf_notify(struct notifier_block *this, unsigned long event, |
8e5e8f30 | 2930 | void *data) |
1da177e4 LT |
2931 | { |
2932 | struct net_device *dev = (struct net_device *) data; | |
748e2d93 | 2933 | struct inet6_dev *idev = __in6_dev_get(dev); |
fa69abfe | 2934 | struct net *net = dev_net(dev); |
c5e33bdd | 2935 | int run_pending = 0; |
b217d616 | 2936 | int err; |
1da177e4 | 2937 | |
e21e8467 | 2938 | switch (event) { |
45ba9dd2 | 2939 | case NETDEV_REGISTER: |
74235a25 | 2940 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
45ba9dd2 YH |
2941 | idev = ipv6_add_dev(dev); |
2942 | if (!idev) | |
b217d616 | 2943 | return notifier_from_errno(-ENOMEM); |
45ba9dd2 YH |
2944 | } |
2945 | break; | |
bcdd553f | 2946 | |
1da177e4 | 2947 | case NETDEV_UP: |
3c21edbd | 2948 | case NETDEV_CHANGE: |
c2edacf8 JV |
2949 | if (dev->flags & IFF_SLAVE) |
2950 | break; | |
2951 | ||
3c21edbd | 2952 | if (event == NETDEV_UP) { |
f24e3d65 | 2953 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd | 2954 | /* device is not ready yet. */ |
f3213831 | 2955 | pr_info("ADDRCONF(NETDEV_UP): %s: link is not ready\n", |
3c21edbd YH |
2956 | dev->name); |
2957 | break; | |
2958 | } | |
99081049 | 2959 | |
d31c7b8f EP |
2960 | if (!idev && dev->mtu >= IPV6_MIN_MTU) |
2961 | idev = ipv6_add_dev(dev); | |
2962 | ||
e3ec6cfc | 2963 | if (idev) { |
99081049 | 2964 | idev->if_flags |= IF_READY; |
e3ec6cfc BT |
2965 | run_pending = 1; |
2966 | } | |
3c21edbd | 2967 | } else { |
f24e3d65 | 2968 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd YH |
2969 | /* device is still not ready. */ |
2970 | break; | |
2971 | } | |
2972 | ||
2973 | if (idev) { | |
bcdd553f | 2974 | if (idev->if_flags & IF_READY) |
3c21edbd YH |
2975 | /* device is already configured. */ |
2976 | break; | |
3c21edbd YH |
2977 | idev->if_flags |= IF_READY; |
2978 | } | |
2979 | ||
f3213831 JP |
2980 | pr_info("ADDRCONF(NETDEV_CHANGE): %s: link becomes ready\n", |
2981 | dev->name); | |
3c21edbd | 2982 | |
c5e33bdd | 2983 | run_pending = 1; |
3c21edbd YH |
2984 | } |
2985 | ||
e21e8467 | 2986 | switch (dev->type) { |
07a93626 | 2987 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 LT |
2988 | case ARPHRD_SIT: |
2989 | addrconf_sit_config(dev); | |
2990 | break; | |
aee80b54 | 2991 | #endif |
07a93626 | 2992 | #if IS_ENABLED(CONFIG_NET_IPGRE) |
aee80b54 | 2993 | case ARPHRD_IPGRE: |
2994 | addrconf_gre_config(dev); | |
2995 | break; | |
0be669bb | 2996 | #endif |
1da177e4 LT |
2997 | case ARPHRD_TUNNEL6: |
2998 | addrconf_ip6_tnl_config(dev); | |
2999 | break; | |
3000 | case ARPHRD_LOOPBACK: | |
3001 | init_loopback(dev); | |
3002 | break; | |
3003 | ||
3004 | default: | |
3005 | addrconf_dev_config(dev); | |
3006 | break; | |
3ff50b79 | 3007 | } |
bcdd553f | 3008 | |
1da177e4 | 3009 | if (idev) { |
c5e33bdd YH |
3010 | if (run_pending) |
3011 | addrconf_dad_run(idev); | |
3012 | ||
bcdd553f SH |
3013 | /* |
3014 | * If the MTU changed during the interface down, | |
3015 | * when the interface up, the changed MTU must be | |
3016 | * reflected in the idev as well as routers. | |
1da177e4 | 3017 | */ |
bcdd553f SH |
3018 | if (idev->cnf.mtu6 != dev->mtu && |
3019 | dev->mtu >= IPV6_MIN_MTU) { | |
1da177e4 LT |
3020 | rt6_mtu_change(dev, dev->mtu); |
3021 | idev->cnf.mtu6 = dev->mtu; | |
3022 | } | |
3023 | idev->tstamp = jiffies; | |
3024 | inet6_ifinfo_notify(RTM_NEWLINK, idev); | |
bcdd553f SH |
3025 | |
3026 | /* | |
3027 | * If the changed mtu during down is lower than | |
3028 | * IPV6_MIN_MTU stop IPv6 on this interface. | |
1da177e4 LT |
3029 | */ |
3030 | if (dev->mtu < IPV6_MIN_MTU) | |
fa69abfe | 3031 | addrconf_ifdown(dev, dev != net->loopback_dev); |
1da177e4 LT |
3032 | } |
3033 | break; | |
3034 | ||
3035 | case NETDEV_CHANGEMTU: | |
d31c7b8f | 3036 | if (idev && dev->mtu >= IPV6_MIN_MTU) { |
1da177e4 LT |
3037 | rt6_mtu_change(dev, dev->mtu); |
3038 | idev->cnf.mtu6 = dev->mtu; | |
3039 | break; | |
3040 | } | |
3041 | ||
d31c7b8f EP |
3042 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
3043 | idev = ipv6_add_dev(dev); | |
3044 | if (idev) | |
3045 | break; | |
3046 | } | |
3047 | ||
bcdd553f SH |
3048 | /* |
3049 | * MTU falled under IPV6_MIN_MTU. | |
3050 | * Stop IPv6 on this interface. | |
3051 | */ | |
1da177e4 LT |
3052 | |
3053 | case NETDEV_DOWN: | |
3054 | case NETDEV_UNREGISTER: | |
3055 | /* | |
3056 | * Remove all addresses from this interface. | |
3057 | */ | |
3058 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
3059 | break; | |
3c21edbd | 3060 | |
1da177e4 | 3061 | case NETDEV_CHANGENAME: |
1da177e4 | 3062 | if (idev) { |
5632c515 | 3063 | snmp6_unregister_dev(idev); |
408c4768 | 3064 | addrconf_sysctl_unregister(idev); |
f52295a9 | 3065 | addrconf_sysctl_register(idev); |
b217d616 HX |
3066 | err = snmp6_register_dev(idev); |
3067 | if (err) | |
3068 | return notifier_from_errno(err); | |
5632c515 | 3069 | } |
1da177e4 | 3070 | break; |
bcdd553f | 3071 | |
93d9b7d7 JP |
3072 | case NETDEV_PRE_TYPE_CHANGE: |
3073 | case NETDEV_POST_TYPE_CHANGE: | |
3074 | addrconf_type_change(dev, event); | |
75c78500 | 3075 | break; |
3ff50b79 | 3076 | } |
1da177e4 LT |
3077 | |
3078 | return NOTIFY_OK; | |
3079 | } | |
3080 | ||
3081 | /* | |
3082 | * addrconf module should be notified of a device going up | |
3083 | */ | |
3084 | static struct notifier_block ipv6_dev_notf = { | |
3085 | .notifier_call = addrconf_notify, | |
1da177e4 LT |
3086 | }; |
3087 | ||
93d9b7d7 | 3088 | static void addrconf_type_change(struct net_device *dev, unsigned long event) |
75c78500 MS |
3089 | { |
3090 | struct inet6_dev *idev; | |
3091 | ASSERT_RTNL(); | |
3092 | ||
3093 | idev = __in6_dev_get(dev); | |
3094 | ||
93d9b7d7 | 3095 | if (event == NETDEV_POST_TYPE_CHANGE) |
75c78500 | 3096 | ipv6_mc_remap(idev); |
93d9b7d7 | 3097 | else if (event == NETDEV_PRE_TYPE_CHANGE) |
75c78500 MS |
3098 | ipv6_mc_unmap(idev); |
3099 | } | |
3100 | ||
1da177e4 LT |
3101 | static int addrconf_ifdown(struct net_device *dev, int how) |
3102 | { | |
c346dca1 | 3103 | struct net *net = dev_net(dev); |
502a2ffd | 3104 | struct inet6_dev *idev; |
3105 | struct inet6_ifaddr *ifa; | |
73a8bd74 | 3106 | int state, i; |
1da177e4 LT |
3107 | |
3108 | ASSERT_RTNL(); | |
3109 | ||
73a8bd74 DM |
3110 | rt6_ifdown(net, dev); |
3111 | neigh_ifdown(&nd_tbl, dev); | |
1da177e4 LT |
3112 | |
3113 | idev = __in6_dev_get(dev); | |
3114 | if (idev == NULL) | |
3115 | return -ENODEV; | |
3116 | ||
bcdd553f SH |
3117 | /* |
3118 | * Step 1: remove reference to ipv6 device from parent device. | |
3119 | * Do not dev_put! | |
1da177e4 | 3120 | */ |
439e2385 | 3121 | if (how) { |
1da177e4 | 3122 | idev->dead = 1; |
8814c4b5 YH |
3123 | |
3124 | /* protected by rtnl_lock */ | |
a9b3cd7f | 3125 | RCU_INIT_POINTER(dev->ip6_ptr, NULL); |
1da177e4 LT |
3126 | |
3127 | /* Step 1.5: remove snmp6 entry */ | |
3128 | snmp6_unregister_dev(idev); | |
3129 | ||
3130 | } | |
3131 | ||
73a8bd74 DM |
3132 | /* Step 2: clear hash table */ |
3133 | for (i = 0; i < IN6_ADDR_HSIZE; i++) { | |
3134 | struct hlist_head *h = &inet6_addr_lst[i]; | |
73a8bd74 DM |
3135 | |
3136 | spin_lock_bh(&addrconf_hash_lock); | |
3137 | restart: | |
b67bfe0d | 3138 | hlist_for_each_entry_rcu(ifa, h, addr_lst) { |
73a8bd74 DM |
3139 | if (ifa->idev == idev) { |
3140 | hlist_del_init_rcu(&ifa->addr_lst); | |
835b474b | 3141 | addrconf_del_dad_work(ifa); |
73a8bd74 DM |
3142 | goto restart; |
3143 | } | |
3144 | } | |
3145 | spin_unlock_bh(&addrconf_hash_lock); | |
3146 | } | |
3147 | ||
1da177e4 LT |
3148 | write_lock_bh(&idev->lock); |
3149 | ||
973d5956 HFS |
3150 | addrconf_del_rs_timer(idev); |
3151 | ||
bcdd553f | 3152 | /* Step 2: clear flags for stateless addrconf */ |
439e2385 | 3153 | if (!how) |
3c21edbd | 3154 | idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); |
1da177e4 | 3155 | |
1da177e4 | 3156 | #ifdef CONFIG_IPV6_PRIVACY |
439e2385 | 3157 | if (how && del_timer(&idev->regen_timer)) |
1da177e4 LT |
3158 | in6_dev_put(idev); |
3159 | ||
bcdd553f | 3160 | /* Step 3: clear tempaddr list */ |
372e6c8f | 3161 | while (!list_empty(&idev->tempaddr_list)) { |
3162 | ifa = list_first_entry(&idev->tempaddr_list, | |
3163 | struct inet6_ifaddr, tmp_list); | |
3164 | list_del(&ifa->tmp_list); | |
1da177e4 LT |
3165 | write_unlock_bh(&idev->lock); |
3166 | spin_lock_bh(&ifa->lock); | |
3167 | ||
3168 | if (ifa->ifpub) { | |
3169 | in6_ifa_put(ifa->ifpub); | |
3170 | ifa->ifpub = NULL; | |
3171 | } | |
3172 | spin_unlock_bh(&ifa->lock); | |
3173 | in6_ifa_put(ifa); | |
3174 | write_lock_bh(&idev->lock); | |
3175 | } | |
3176 | #endif | |
8f37ada5 | 3177 | |
502a2ffd | 3178 | while (!list_empty(&idev->addr_list)) { |
3179 | ifa = list_first_entry(&idev->addr_list, | |
3180 | struct inet6_ifaddr, if_list); | |
835b474b | 3181 | addrconf_del_dad_work(ifa); |
84e8b803 | 3182 | |
73a8bd74 | 3183 | list_del(&ifa->if_list); |
84e8b803 | 3184 | |
73a8bd74 | 3185 | write_unlock_bh(&idev->lock); |
84e8b803 | 3186 | |
73a8bd74 DM |
3187 | spin_lock_bh(&ifa->state_lock); |
3188 | state = ifa->state; | |
3189 | ifa->state = INET6_IFADDR_STATE_DEAD; | |
3190 | spin_unlock_bh(&ifa->state_lock); | |
9d82ca98 | 3191 | |
73a8bd74 DM |
3192 | if (state != INET6_IFADDR_STATE_DEAD) { |
3193 | __ipv6_ifa_notify(RTM_DELADDR, ifa); | |
f88c91dd | 3194 | inet6addr_notifier_call_chain(NETDEV_DOWN, ifa); |
27bdb2ab | 3195 | } |
73a8bd74 | 3196 | in6_ifa_put(ifa); |
8f37ada5 | 3197 | |
73a8bd74 DM |
3198 | write_lock_bh(&idev->lock); |
3199 | } | |
8f37ada5 | 3200 | |
1da177e4 LT |
3201 | write_unlock_bh(&idev->lock); |
3202 | ||
3203 | /* Step 5: Discard multicast list */ | |
439e2385 | 3204 | if (how) |
1da177e4 LT |
3205 | ipv6_mc_destroy_dev(idev); |
3206 | else | |
3207 | ipv6_mc_down(idev); | |
3208 | ||
1da177e4 | 3209 | idev->tstamp = jiffies; |
1ab1457c | 3210 | |
bcdd553f | 3211 | /* Last: Shot the device (if unregistered) */ |
439e2385 | 3212 | if (how) { |
408c4768 | 3213 | addrconf_sysctl_unregister(idev); |
1da177e4 LT |
3214 | neigh_parms_release(&nd_tbl, idev->nd_parms); |
3215 | neigh_ifdown(&nd_tbl, dev); | |
3216 | in6_dev_put(idev); | |
3217 | } | |
3218 | return 0; | |
3219 | } | |
3220 | ||
3221 | static void addrconf_rs_timer(unsigned long data) | |
3222 | { | |
973d5956 HFS |
3223 | struct inet6_dev *idev = (struct inet6_dev *)data; |
3224 | struct in6_addr lladdr; | |
1da177e4 | 3225 | |
973d5956 | 3226 | write_lock(&idev->lock); |
5b2a1953 | 3227 | if (idev->dead || !(idev->if_flags & IF_READY)) |
1da177e4 LT |
3228 | goto out; |
3229 | ||
9ba2add3 | 3230 | if (!ipv6_accept_ra(idev)) |
5b2a1953 | 3231 | goto out; |
3232 | ||
3233 | /* Announcement received after solicitation was sent */ | |
3234 | if (idev->if_flags & IF_RA_RCVD) | |
1da177e4 | 3235 | goto out; |
1da177e4 | 3236 | |
973d5956 HFS |
3237 | if (idev->rs_probes++ < idev->cnf.rtr_solicits) { |
3238 | if (!__ipv6_get_lladdr(idev, &lladdr, IFA_F_TENTATIVE)) | |
3239 | ndisc_send_rs(idev->dev, &lladdr, | |
3240 | &in6addr_linklocal_allrouters); | |
3241 | else | |
3242 | goto out; | |
1da177e4 | 3243 | |
973d5956 HFS |
3244 | /* The wait after the last probe can be shorter */ |
3245 | addrconf_mod_rs_timer(idev, (idev->rs_probes == | |
3246 | idev->cnf.rtr_solicits) ? | |
3247 | idev->cnf.rtr_solicit_delay : | |
3248 | idev->cnf.rtr_solicit_interval); | |
1da177e4 | 3249 | } else { |
1da177e4 LT |
3250 | /* |
3251 | * Note: we do not support deprecated "all on-link" | |
3252 | * assumption any longer. | |
3253 | */ | |
91df42be | 3254 | pr_debug("%s: no IPv6 routers present\n", idev->dev->name); |
1da177e4 LT |
3255 | } |
3256 | ||
3257 | out: | |
973d5956 HFS |
3258 | write_unlock(&idev->lock); |
3259 | in6_dev_put(idev); | |
1da177e4 LT |
3260 | } |
3261 | ||
3262 | /* | |
3263 | * Duplicate Address Detection | |
3264 | */ | |
3c21edbd YH |
3265 | static void addrconf_dad_kick(struct inet6_ifaddr *ifp) |
3266 | { | |
3267 | unsigned long rand_num; | |
3268 | struct inet6_dev *idev = ifp->idev; | |
3269 | ||
95c385b4 NH |
3270 | if (ifp->flags & IFA_F_OPTIMISTIC) |
3271 | rand_num = 0; | |
3272 | else | |
3273 | rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1); | |
3274 | ||
973d5956 | 3275 | ifp->dad_probes = idev->cnf.dad_transmits; |
835b474b | 3276 | addrconf_mod_dad_work(ifp, rand_num); |
3c21edbd YH |
3277 | } |
3278 | ||
835b474b | 3279 | static void addrconf_dad_begin(struct inet6_ifaddr *ifp) |
1da177e4 LT |
3280 | { |
3281 | struct inet6_dev *idev = ifp->idev; | |
3282 | struct net_device *dev = idev->dev; | |
1da177e4 LT |
3283 | |
3284 | addrconf_join_solict(dev, &ifp->addr); | |
3285 | ||
1da177e4 | 3286 | net_srandom(ifp->addr.s6_addr32[3]); |
1da177e4 LT |
3287 | |
3288 | read_lock_bh(&idev->lock); | |
622ccdf1 | 3289 | spin_lock(&ifp->lock); |
e9d3e084 | 3290 | if (ifp->state == INET6_IFADDR_STATE_DEAD) |
1da177e4 | 3291 | goto out; |
1da177e4 LT |
3292 | |
3293 | if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || | |
1b34be74 | 3294 | idev->cnf.accept_dad < 1 || |
55ebaef1 NT |
3295 | !(ifp->flags&IFA_F_TENTATIVE) || |
3296 | ifp->flags & IFA_F_NODAD) { | |
cc411d0b | 3297 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
21809faf | 3298 | spin_unlock(&ifp->lock); |
1da177e4 LT |
3299 | read_unlock_bh(&idev->lock); |
3300 | ||
3301 | addrconf_dad_completed(ifp); | |
3302 | return; | |
3303 | } | |
3304 | ||
6732bade | 3305 | if (!(idev->if_flags & IF_READY)) { |
21809faf | 3306 | spin_unlock(&ifp->lock); |
6732bade | 3307 | read_unlock_bh(&idev->lock); |
3c21edbd | 3308 | /* |
590a9887 | 3309 | * If the device is not ready: |
3c21edbd YH |
3310 | * - keep it tentative if it is a permanent address. |
3311 | * - otherwise, kill it. | |
3312 | */ | |
3313 | in6_ifa_hold(ifp); | |
cc411d0b | 3314 | addrconf_dad_stop(ifp, 0); |
6732bade | 3315 | return; |
3c21edbd | 3316 | } |
95c385b4 NH |
3317 | |
3318 | /* | |
3319 | * Optimistic nodes can start receiving | |
3320 | * Frames right away | |
3321 | */ | |
e21e8467 | 3322 | if (ifp->flags & IFA_F_OPTIMISTIC) |
95c385b4 NH |
3323 | ip6_ins_rt(ifp->rt); |
3324 | ||
6732bade | 3325 | addrconf_dad_kick(ifp); |
1da177e4 | 3326 | out: |
622ccdf1 | 3327 | spin_unlock(&ifp->lock); |
1da177e4 LT |
3328 | read_unlock_bh(&idev->lock); |
3329 | } | |
3330 | ||
835b474b | 3331 | static void addrconf_dad_start(struct inet6_ifaddr *ifp) |
1da177e4 | 3332 | { |
835b474b HFS |
3333 | bool begin_dad = false; |
3334 | ||
3335 | spin_lock_bh(&ifp->state_lock); | |
3336 | if (ifp->state != INET6_IFADDR_STATE_DEAD) { | |
3337 | ifp->state = INET6_IFADDR_STATE_PREDAD; | |
3338 | begin_dad = true; | |
3339 | } | |
3340 | spin_unlock_bh(&ifp->state_lock); | |
3341 | ||
3342 | if (begin_dad) | |
3343 | addrconf_mod_dad_work(ifp, 0); | |
3344 | } | |
3345 | ||
3346 | static void addrconf_dad_work(struct work_struct *w) | |
1da177e4 | 3347 | { |
835b474b HFS |
3348 | struct inet6_ifaddr *ifp = container_of(to_delayed_work(w), |
3349 | struct inet6_ifaddr, | |
3350 | dad_work); | |
1da177e4 | 3351 | struct inet6_dev *idev = ifp->idev; |
1da177e4 LT |
3352 | struct in6_addr mcaddr; |
3353 | ||
835b474b HFS |
3354 | enum { |
3355 | DAD_PROCESS, | |
3356 | DAD_BEGIN, | |
3357 | DAD_ABORT, | |
3358 | } action = DAD_PROCESS; | |
3359 | ||
3360 | rtnl_lock(); | |
3361 | ||
3362 | spin_lock_bh(&ifp->state_lock); | |
3363 | if (ifp->state == INET6_IFADDR_STATE_PREDAD) { | |
3364 | action = DAD_BEGIN; | |
3365 | ifp->state = INET6_IFADDR_STATE_DAD; | |
3366 | } else if (ifp->state == INET6_IFADDR_STATE_ERRDAD) { | |
3367 | action = DAD_ABORT; | |
3368 | ifp->state = INET6_IFADDR_STATE_POSTDAD; | |
3369 | } | |
3370 | spin_unlock_bh(&ifp->state_lock); | |
3371 | ||
3372 | if (action == DAD_BEGIN) { | |
3373 | addrconf_dad_begin(ifp); | |
3374 | goto out; | |
3375 | } else if (action == DAD_ABORT) { | |
04355d67 | 3376 | in6_ifa_hold(ifp); |
835b474b | 3377 | addrconf_dad_stop(ifp, 1); |
f2344a13 | 3378 | goto out; |
835b474b | 3379 | } |
f2344a13 | 3380 | |
973d5956 | 3381 | if (!ifp->dad_probes && addrconf_dad_end(ifp)) |
f2344a13 HX |
3382 | goto out; |
3383 | ||
835b474b | 3384 | write_lock_bh(&idev->lock); |
122e4519 | 3385 | if (idev->dead || !(idev->if_flags & IF_READY)) { |
835b474b | 3386 | write_unlock_bh(&idev->lock); |
1da177e4 LT |
3387 | goto out; |
3388 | } | |
21809faf | 3389 | |
3390 | spin_lock(&ifp->lock); | |
622ccdf1 HX |
3391 | if (ifp->state == INET6_IFADDR_STATE_DEAD) { |
3392 | spin_unlock(&ifp->lock); | |
835b474b | 3393 | write_unlock_bh(&idev->lock); |
622ccdf1 HX |
3394 | goto out; |
3395 | } | |
3396 | ||
973d5956 | 3397 | if (ifp->dad_probes == 0) { |
1da177e4 LT |
3398 | /* |
3399 | * DAD was successful | |
3400 | */ | |
3401 | ||
cc411d0b | 3402 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
21809faf | 3403 | spin_unlock(&ifp->lock); |
835b474b | 3404 | write_unlock_bh(&idev->lock); |
1da177e4 LT |
3405 | |
3406 | addrconf_dad_completed(ifp); | |
3407 | ||
3408 | goto out; | |
3409 | } | |
3410 | ||
973d5956 | 3411 | ifp->dad_probes--; |
835b474b | 3412 | addrconf_mod_dad_work(ifp, ifp->idev->nd_parms->retrans_time); |
21809faf | 3413 | spin_unlock(&ifp->lock); |
835b474b | 3414 | write_unlock_bh(&idev->lock); |
1da177e4 LT |
3415 | |
3416 | /* send a neighbour solicitation for our addr */ | |
1da177e4 | 3417 | addrconf_addr_solict_mult(&ifp->addr, &mcaddr); |
d7aabf22 | 3418 | ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any); |
1da177e4 LT |
3419 | out: |
3420 | in6_ifa_put(ifp); | |
835b474b | 3421 | rtnl_unlock(); |
1da177e4 LT |
3422 | } |
3423 | ||
3424 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp) | |
3425 | { | |
e21e8467 | 3426 | struct net_device *dev = ifp->idev->dev; |
973d5956 HFS |
3427 | struct in6_addr lladdr; |
3428 | ||
835b474b | 3429 | addrconf_del_dad_work(ifp); |
1da177e4 LT |
3430 | |
3431 | /* | |
3432 | * Configure the address for reception. Now it is valid. | |
3433 | */ | |
3434 | ||
3435 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
3436 | ||
026359bc TA |
3437 | /* If added prefix is link local and we are prepared to process |
3438 | router advertisements, start sending router solicitations. | |
1da177e4 LT |
3439 | */ |
3440 | ||
aeaf6e9d | 3441 | if (ipv6_accept_ra(ifp->idev) && |
1da177e4 LT |
3442 | ifp->idev->cnf.rtr_solicits > 0 && |
3443 | (dev->flags&IFF_LOOPBACK) == 0 && | |
3444 | (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) { | |
1da177e4 LT |
3445 | /* |
3446 | * If a host as already performed a random delay | |
3447 | * [...] as part of DAD [...] there is no need | |
3448 | * to delay again before sending the first RS | |
3449 | */ | |
973d5956 HFS |
3450 | if (!ipv6_get_lladdr(dev, &lladdr, IFA_F_TENTATIVE)) |
3451 | ndisc_send_rs(dev, &lladdr, | |
3452 | &in6addr_linklocal_allrouters); | |
3453 | else | |
3454 | return; | |
1da177e4 | 3455 | |
973d5956 HFS |
3456 | write_lock_bh(&ifp->idev->lock); |
3457 | spin_lock(&ifp->lock); | |
3458 | ifp->idev->rs_probes = 1; | |
1da177e4 | 3459 | ifp->idev->if_flags |= IF_RS_SENT; |
973d5956 HFS |
3460 | addrconf_mod_rs_timer(ifp->idev, |
3461 | ifp->idev->cnf.rtr_solicit_interval); | |
3462 | spin_unlock(&ifp->lock); | |
3463 | write_unlock_bh(&ifp->idev->lock); | |
1da177e4 LT |
3464 | } |
3465 | } | |
3466 | ||
e21e8467 SH |
3467 | static void addrconf_dad_run(struct inet6_dev *idev) |
3468 | { | |
c5e33bdd YH |
3469 | struct inet6_ifaddr *ifp; |
3470 | ||
3471 | read_lock_bh(&idev->lock); | |
502a2ffd | 3472 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
21809faf | 3473 | spin_lock(&ifp->lock); |
f2344a13 HX |
3474 | if (ifp->flags & IFA_F_TENTATIVE && |
3475 | ifp->state == INET6_IFADDR_STATE_DAD) | |
3476 | addrconf_dad_kick(ifp); | |
21809faf | 3477 | spin_unlock(&ifp->lock); |
c5e33bdd YH |
3478 | } |
3479 | read_unlock_bh(&idev->lock); | |
3480 | } | |
3481 | ||
1da177e4 LT |
3482 | #ifdef CONFIG_PROC_FS |
3483 | struct if6_iter_state { | |
3c40090a | 3484 | struct seq_net_private p; |
1da177e4 | 3485 | int bucket; |
1d578303 | 3486 | int offset; |
1da177e4 LT |
3487 | }; |
3488 | ||
1d578303 | 3489 | static struct inet6_ifaddr *if6_get_first(struct seq_file *seq, loff_t pos) |
1da177e4 LT |
3490 | { |
3491 | struct inet6_ifaddr *ifa = NULL; | |
3492 | struct if6_iter_state *state = seq->private; | |
1218854a | 3493 | struct net *net = seq_file_net(seq); |
1d578303 | 3494 | int p = 0; |
1da177e4 | 3495 | |
1d578303 MM |
3496 | /* initial bucket if pos is 0 */ |
3497 | if (pos == 0) { | |
3498 | state->bucket = 0; | |
3499 | state->offset = 0; | |
3500 | } | |
3501 | ||
3502 | for (; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { | |
b67bfe0d | 3503 | hlist_for_each_entry_rcu_bh(ifa, &inet6_addr_lst[state->bucket], |
1d578303 | 3504 | addr_lst) { |
9f0d3c27 ED |
3505 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
3506 | continue; | |
1d578303 MM |
3507 | /* sync with offset */ |
3508 | if (p < state->offset) { | |
3509 | p++; | |
3510 | continue; | |
3511 | } | |
3512 | state->offset++; | |
9f0d3c27 | 3513 | return ifa; |
1d578303 MM |
3514 | } |
3515 | ||
3516 | /* prepare for next bucket */ | |
3517 | state->offset = 0; | |
3518 | p = 0; | |
1da177e4 | 3519 | } |
c2e21293 | 3520 | return NULL; |
1da177e4 LT |
3521 | } |
3522 | ||
c2e21293 | 3523 | static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, |
3524 | struct inet6_ifaddr *ifa) | |
1da177e4 LT |
3525 | { |
3526 | struct if6_iter_state *state = seq->private; | |
1218854a | 3527 | struct net *net = seq_file_net(seq); |
1da177e4 | 3528 | |
b67bfe0d | 3529 | hlist_for_each_entry_continue_rcu_bh(ifa, addr_lst) { |
9f0d3c27 ED |
3530 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
3531 | continue; | |
1d578303 | 3532 | state->offset++; |
9f0d3c27 | 3533 | return ifa; |
1d578303 | 3534 | } |
3c40090a | 3535 | |
c2e21293 | 3536 | while (++state->bucket < IN6_ADDR_HSIZE) { |
1d578303 | 3537 | state->offset = 0; |
b67bfe0d | 3538 | hlist_for_each_entry_rcu_bh(ifa, |
c2e21293 | 3539 | &inet6_addr_lst[state->bucket], addr_lst) { |
9f0d3c27 ED |
3540 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
3541 | continue; | |
1d578303 | 3542 | state->offset++; |
9f0d3c27 | 3543 | return ifa; |
c2e21293 | 3544 | } |
1da177e4 | 3545 | } |
3c40090a | 3546 | |
c2e21293 | 3547 | return NULL; |
1da177e4 LT |
3548 | } |
3549 | ||
1da177e4 | 3550 | static void *if6_seq_start(struct seq_file *seq, loff_t *pos) |
4f70ecca | 3551 | __acquires(rcu_bh) |
1da177e4 | 3552 | { |
5c578aed | 3553 | rcu_read_lock_bh(); |
1d578303 | 3554 | return if6_get_first(seq, *pos); |
1da177e4 LT |
3555 | } |
3556 | ||
3557 | static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
3558 | { | |
3559 | struct inet6_ifaddr *ifa; | |
3560 | ||
3561 | ifa = if6_get_next(seq, v); | |
3562 | ++*pos; | |
3563 | return ifa; | |
3564 | } | |
3565 | ||
3566 | static void if6_seq_stop(struct seq_file *seq, void *v) | |
4f70ecca | 3567 | __releases(rcu_bh) |
1da177e4 | 3568 | { |
5c578aed | 3569 | rcu_read_unlock_bh(); |
1da177e4 LT |
3570 | } |
3571 | ||
3572 | static int if6_seq_show(struct seq_file *seq, void *v) | |
3573 | { | |
3574 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; | |
4b7a4274 | 3575 | seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n", |
b071195d | 3576 | &ifp->addr, |
1da177e4 LT |
3577 | ifp->idev->dev->ifindex, |
3578 | ifp->prefix_len, | |
3579 | ifp->scope, | |
3580 | ifp->flags, | |
3581 | ifp->idev->dev->name); | |
3582 | return 0; | |
3583 | } | |
3584 | ||
56b3d975 | 3585 | static const struct seq_operations if6_seq_ops = { |
1da177e4 LT |
3586 | .start = if6_seq_start, |
3587 | .next = if6_seq_next, | |
3588 | .show = if6_seq_show, | |
3589 | .stop = if6_seq_stop, | |
3590 | }; | |
3591 | ||
3592 | static int if6_seq_open(struct inode *inode, struct file *file) | |
3593 | { | |
3c40090a DL |
3594 | return seq_open_net(inode, file, &if6_seq_ops, |
3595 | sizeof(struct if6_iter_state)); | |
1da177e4 LT |
3596 | } |
3597 | ||
9a32144e | 3598 | static const struct file_operations if6_fops = { |
1da177e4 LT |
3599 | .owner = THIS_MODULE, |
3600 | .open = if6_seq_open, | |
3601 | .read = seq_read, | |
3602 | .llseek = seq_lseek, | |
3c40090a | 3603 | .release = seq_release_net, |
1da177e4 LT |
3604 | }; |
3605 | ||
2c8c1e72 | 3606 | static int __net_init if6_proc_net_init(struct net *net) |
1da177e4 | 3607 | { |
d4beaa66 | 3608 | if (!proc_create("if_inet6", S_IRUGO, net->proc_net, &if6_fops)) |
1da177e4 LT |
3609 | return -ENOMEM; |
3610 | return 0; | |
3611 | } | |
3612 | ||
2c8c1e72 | 3613 | static void __net_exit if6_proc_net_exit(struct net *net) |
3c40090a | 3614 | { |
ece31ffd | 3615 | remove_proc_entry("if_inet6", net->proc_net); |
3c40090a DL |
3616 | } |
3617 | ||
3618 | static struct pernet_operations if6_proc_net_ops = { | |
3619 | .init = if6_proc_net_init, | |
3620 | .exit = if6_proc_net_exit, | |
3621 | }; | |
3622 | ||
3623 | int __init if6_proc_init(void) | |
3624 | { | |
3625 | return register_pernet_subsys(&if6_proc_net_ops); | |
3626 | } | |
3627 | ||
1da177e4 LT |
3628 | void if6_proc_exit(void) |
3629 | { | |
3c40090a | 3630 | unregister_pernet_subsys(&if6_proc_net_ops); |
1da177e4 LT |
3631 | } |
3632 | #endif /* CONFIG_PROC_FS */ | |
3633 | ||
07a93626 | 3634 | #if IS_ENABLED(CONFIG_IPV6_MIP6) |
3b9f9a1c | 3635 | /* Check if address is a home address configured on any interface. */ |
b71d1d42 | 3636 | int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr) |
3b9f9a1c NT |
3637 | { |
3638 | int ret = 0; | |
c2e21293 | 3639 | struct inet6_ifaddr *ifp = NULL; |
ddbe5032 | 3640 | unsigned int hash = inet6_addr_hash(addr); |
c2e21293 | 3641 | |
5c578aed | 3642 | rcu_read_lock_bh(); |
b67bfe0d | 3643 | hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 3644 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
389f6612 | 3645 | continue; |
caad295f | 3646 | if (ipv6_addr_equal(&ifp->addr, addr) && |
3b9f9a1c NT |
3647 | (ifp->flags & IFA_F_HOMEADDRESS)) { |
3648 | ret = 1; | |
3649 | break; | |
3650 | } | |
3651 | } | |
5c578aed | 3652 | rcu_read_unlock_bh(); |
3b9f9a1c NT |
3653 | return ret; |
3654 | } | |
3655 | #endif | |
3656 | ||
1da177e4 LT |
3657 | /* |
3658 | * Periodic address status verification | |
3659 | */ | |
3660 | ||
835b474b | 3661 | static void addrconf_verify_rtnl(void) |
1da177e4 | 3662 | { |
b2db7564 | 3663 | unsigned long now, next, next_sec, next_sched; |
1da177e4 | 3664 | struct inet6_ifaddr *ifp; |
1da177e4 LT |
3665 | int i; |
3666 | ||
835b474b HFS |
3667 | ASSERT_RTNL(); |
3668 | ||
5c578aed | 3669 | rcu_read_lock_bh(); |
1da177e4 | 3670 | now = jiffies; |
b2db7564 | 3671 | next = round_jiffies_up(now + ADDR_CHECK_FREQUENCY); |
1da177e4 | 3672 | |
835b474b | 3673 | cancel_delayed_work(&addr_chk_work); |
1da177e4 | 3674 | |
bcdd553f | 3675 | for (i = 0; i < IN6_ADDR_HSIZE; i++) { |
1da177e4 | 3676 | restart: |
835b474b | 3677 | hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[i], addr_lst) { |
1da177e4 | 3678 | unsigned long age; |
1da177e4 LT |
3679 | |
3680 | if (ifp->flags & IFA_F_PERMANENT) | |
3681 | continue; | |
3682 | ||
3683 | spin_lock(&ifp->lock); | |
b2db7564 YH |
3684 | /* We try to batch several events at once. */ |
3685 | age = (now - ifp->tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ; | |
1da177e4 | 3686 | |
8f27ebb9 YH |
3687 | if (ifp->valid_lft != INFINITY_LIFE_TIME && |
3688 | age >= ifp->valid_lft) { | |
1da177e4 LT |
3689 | spin_unlock(&ifp->lock); |
3690 | in6_ifa_hold(ifp); | |
1da177e4 LT |
3691 | ipv6_del_addr(ifp); |
3692 | goto restart; | |
8f27ebb9 YH |
3693 | } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { |
3694 | spin_unlock(&ifp->lock); | |
3695 | continue; | |
1da177e4 | 3696 | } else if (age >= ifp->prefered_lft) { |
a1ed0526 | 3697 | /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */ |
1da177e4 LT |
3698 | int deprecate = 0; |
3699 | ||
3700 | if (!(ifp->flags&IFA_F_DEPRECATED)) { | |
3701 | deprecate = 1; | |
3702 | ifp->flags |= IFA_F_DEPRECATED; | |
3703 | } | |
3704 | ||
3705 | if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next)) | |
3706 | next = ifp->tstamp + ifp->valid_lft * HZ; | |
3707 | ||
3708 | spin_unlock(&ifp->lock); | |
3709 | ||
3710 | if (deprecate) { | |
3711 | in6_ifa_hold(ifp); | |
1da177e4 LT |
3712 | |
3713 | ipv6_ifa_notify(0, ifp); | |
3714 | in6_ifa_put(ifp); | |
3715 | goto restart; | |
3716 | } | |
3717 | #ifdef CONFIG_IPV6_PRIVACY | |
3718 | } else if ((ifp->flags&IFA_F_TEMPORARY) && | |
3719 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
88949cf4 | 3720 | unsigned long regen_advance = ifp->idev->cnf.regen_max_retry * |
3721 | ifp->idev->cnf.dad_transmits * | |
3722 | ifp->idev->nd_parms->retrans_time / HZ; | |
3723 | ||
1da177e4 LT |
3724 | if (age >= ifp->prefered_lft - regen_advance) { |
3725 | struct inet6_ifaddr *ifpub = ifp->ifpub; | |
3726 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
3727 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
3728 | if (!ifp->regen_count && ifpub) { | |
3729 | ifp->regen_count++; | |
3730 | in6_ifa_hold(ifp); | |
3731 | in6_ifa_hold(ifpub); | |
3732 | spin_unlock(&ifp->lock); | |
5c578aed | 3733 | |
291d809b HY |
3734 | spin_lock(&ifpub->lock); |
3735 | ifpub->regen_count = 0; | |
3736 | spin_unlock(&ifpub->lock); | |
1da177e4 LT |
3737 | ipv6_create_tempaddr(ifpub, ifp); |
3738 | in6_ifa_put(ifpub); | |
3739 | in6_ifa_put(ifp); | |
3740 | goto restart; | |
3741 | } | |
3742 | } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) | |
3743 | next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; | |
3744 | spin_unlock(&ifp->lock); | |
3745 | #endif | |
3746 | } else { | |
3747 | /* ifp->prefered_lft <= ifp->valid_lft */ | |
3748 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
3749 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
3750 | spin_unlock(&ifp->lock); | |
3751 | } | |
3752 | } | |
1da177e4 LT |
3753 | } |
3754 | ||
b2db7564 YH |
3755 | next_sec = round_jiffies_up(next); |
3756 | next_sched = next; | |
3757 | ||
3758 | /* If rounded timeout is accurate enough, accept it. */ | |
3759 | if (time_before(next_sec, next + ADDRCONF_TIMER_FUZZ)) | |
3760 | next_sched = next_sec; | |
3761 | ||
3762 | /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */ | |
3763 | if (time_before(next_sched, jiffies + ADDRCONF_TIMER_FUZZ_MAX)) | |
3764 | next_sched = jiffies + ADDRCONF_TIMER_FUZZ_MAX; | |
3765 | ||
3766 | ADBG((KERN_DEBUG "now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n", | |
3767 | now, next, next_sec, next_sched)); | |
835b474b | 3768 | mod_delayed_work(addrconf_wq, &addr_chk_work, next_sched - now); |
5c578aed | 3769 | rcu_read_unlock_bh(); |
1da177e4 LT |
3770 | } |
3771 | ||
835b474b HFS |
3772 | static void addrconf_verify_work(struct work_struct *w) |
3773 | { | |
3774 | rtnl_lock(); | |
3775 | addrconf_verify_rtnl(); | |
3776 | rtnl_unlock(); | |
3777 | } | |
3778 | ||
3779 | static void addrconf_verify(void) | |
3780 | { | |
3781 | mod_delayed_work(addrconf_wq, &addr_chk_work, 0); | |
3782 | } | |
3783 | ||
461d8837 TG |
3784 | static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local) |
3785 | { | |
3786 | struct in6_addr *pfx = NULL; | |
3787 | ||
3788 | if (addr) | |
3789 | pfx = nla_data(addr); | |
3790 | ||
3791 | if (local) { | |
3792 | if (pfx && nla_memcmp(local, pfx, sizeof(*pfx))) | |
3793 | pfx = NULL; | |
3794 | else | |
3795 | pfx = nla_data(local); | |
3796 | } | |
3797 | ||
3798 | return pfx; | |
3799 | } | |
3800 | ||
ef7c79ed | 3801 | static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = { |
461d8837 TG |
3802 | [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, |
3803 | [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, | |
3804 | [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, | |
3805 | }; | |
3806 | ||
1da177e4 | 3807 | static int |
661d2967 | 3808 | inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 3809 | { |
3b1e0a65 | 3810 | struct net *net = sock_net(skb->sk); |
b933f716 TG |
3811 | struct ifaddrmsg *ifm; |
3812 | struct nlattr *tb[IFA_MAX+1]; | |
1da177e4 | 3813 | struct in6_addr *pfx; |
b933f716 | 3814 | int err; |
1da177e4 | 3815 | |
b933f716 TG |
3816 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3817 | if (err < 0) | |
3818 | return err; | |
3819 | ||
3820 | ifm = nlmsg_data(nlh); | |
3821 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
1da177e4 LT |
3822 | if (pfx == NULL) |
3823 | return -EINVAL; | |
3824 | ||
af284937 | 3825 | return inet6_addr_del(net, ifm->ifa_index, pfx, ifm->ifa_prefixlen); |
1da177e4 LT |
3826 | } |
3827 | ||
55ebaef1 NT |
3828 | static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags, |
3829 | u32 prefered_lft, u32 valid_lft) | |
081bba5b | 3830 | { |
6f704992 YH |
3831 | u32 flags; |
3832 | clock_t expires; | |
4bed72e4 | 3833 | unsigned long timeout; |
46d48046 | 3834 | |
835b474b HFS |
3835 | ASSERT_RTNL(); |
3836 | ||
081bba5b NT |
3837 | if (!valid_lft || (prefered_lft > valid_lft)) |
3838 | return -EINVAL; | |
3839 | ||
4bed72e4 YH |
3840 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
3841 | if (addrconf_finite_timeout(timeout)) { | |
3842 | expires = jiffies_to_clock_t(timeout * HZ); | |
3843 | valid_lft = timeout; | |
6f704992 | 3844 | flags = RTF_EXPIRES; |
4bed72e4 YH |
3845 | } else { |
3846 | expires = 0; | |
3847 | flags = 0; | |
3848 | ifa_flags |= IFA_F_PERMANENT; | |
6f704992 | 3849 | } |
081bba5b | 3850 | |
4bed72e4 YH |
3851 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
3852 | if (addrconf_finite_timeout(timeout)) { | |
3853 | if (timeout == 0) | |
3854 | ifa_flags |= IFA_F_DEPRECATED; | |
3855 | prefered_lft = timeout; | |
3856 | } | |
081bba5b NT |
3857 | |
3858 | spin_lock_bh(&ifp->lock); | |
3b9f9a1c | 3859 | ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags; |
081bba5b NT |
3860 | ifp->tstamp = jiffies; |
3861 | ifp->valid_lft = valid_lft; | |
3862 | ifp->prefered_lft = prefered_lft; | |
3863 | ||
3864 | spin_unlock_bh(&ifp->lock); | |
3865 | if (!(ifp->flags&IFA_F_TENTATIVE)) | |
3866 | ipv6_ifa_notify(0, ifp); | |
081bba5b | 3867 | |
46d48046 | 3868 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev, |
6f704992 | 3869 | expires, flags); |
835b474b | 3870 | addrconf_verify_rtnl(); |
081bba5b NT |
3871 | |
3872 | return 0; | |
3873 | } | |
3874 | ||
1da177e4 | 3875 | static int |
661d2967 | 3876 | inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 3877 | { |
3b1e0a65 | 3878 | struct net *net = sock_net(skb->sk); |
461d8837 TG |
3879 | struct ifaddrmsg *ifm; |
3880 | struct nlattr *tb[IFA_MAX+1]; | |
1da177e4 | 3881 | struct in6_addr *pfx; |
7198f8ce TG |
3882 | struct inet6_ifaddr *ifa; |
3883 | struct net_device *dev; | |
55ebaef1 NT |
3884 | u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; |
3885 | u8 ifa_flags; | |
461d8837 | 3886 | int err; |
1da177e4 | 3887 | |
461d8837 TG |
3888 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3889 | if (err < 0) | |
3890 | return err; | |
3891 | ||
3892 | ifm = nlmsg_data(nlh); | |
3893 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
1da177e4 LT |
3894 | if (pfx == NULL) |
3895 | return -EINVAL; | |
3896 | ||
461d8837 | 3897 | if (tb[IFA_CACHEINFO]) { |
0778769d | 3898 | struct ifa_cacheinfo *ci; |
461d8837 TG |
3899 | |
3900 | ci = nla_data(tb[IFA_CACHEINFO]); | |
0778769d | 3901 | valid_lft = ci->ifa_valid; |
461d8837 TG |
3902 | preferred_lft = ci->ifa_prefered; |
3903 | } else { | |
3904 | preferred_lft = INFINITY_LIFE_TIME; | |
3905 | valid_lft = INFINITY_LIFE_TIME; | |
0778769d NT |
3906 | } |
3907 | ||
af284937 | 3908 | dev = __dev_get_by_index(net, ifm->ifa_index); |
7198f8ce TG |
3909 | if (dev == NULL) |
3910 | return -ENODEV; | |
3911 | ||
55ebaef1 | 3912 | /* We ignore other flags so far. */ |
3b9f9a1c | 3913 | ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS); |
55ebaef1 | 3914 | |
1cab3da6 | 3915 | ifa = ipv6_get_ifaddr(net, pfx, dev, 1); |
7198f8ce TG |
3916 | if (ifa == NULL) { |
3917 | /* | |
3918 | * It would be best to check for !NLM_F_CREATE here but | |
3919 | * userspace alreay relies on not having to provide this. | |
3920 | */ | |
af284937 DL |
3921 | return inet6_addr_add(net, ifm->ifa_index, pfx, |
3922 | ifm->ifa_prefixlen, ifa_flags, | |
3923 | preferred_lft, valid_lft); | |
081bba5b NT |
3924 | } |
3925 | ||
7198f8ce TG |
3926 | if (nlh->nlmsg_flags & NLM_F_EXCL || |
3927 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) | |
3928 | err = -EEXIST; | |
3929 | else | |
55ebaef1 | 3930 | err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft); |
7198f8ce TG |
3931 | |
3932 | in6_ifa_put(ifa); | |
3933 | ||
3934 | return err; | |
1da177e4 LT |
3935 | } |
3936 | ||
101bb229 TG |
3937 | static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags, |
3938 | u8 scope, int ifindex) | |
3939 | { | |
3940 | struct ifaddrmsg *ifm; | |
3941 | ||
3942 | ifm = nlmsg_data(nlh); | |
3943 | ifm->ifa_family = AF_INET6; | |
3944 | ifm->ifa_prefixlen = prefixlen; | |
3945 | ifm->ifa_flags = flags; | |
3946 | ifm->ifa_scope = scope; | |
3947 | ifm->ifa_index = ifindex; | |
3948 | } | |
3949 | ||
85486af0 TG |
3950 | static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, |
3951 | unsigned long tstamp, u32 preferred, u32 valid) | |
3952 | { | |
3953 | struct ifa_cacheinfo ci; | |
3954 | ||
18a31e1e TG |
3955 | ci.cstamp = cstamp_delta(cstamp); |
3956 | ci.tstamp = cstamp_delta(tstamp); | |
85486af0 TG |
3957 | ci.ifa_prefered = preferred; |
3958 | ci.ifa_valid = valid; | |
3959 | ||
3960 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
3961 | } | |
3962 | ||
101bb229 TG |
3963 | static inline int rt_scope(int ifa_scope) |
3964 | { | |
3965 | if (ifa_scope & IFA_HOST) | |
3966 | return RT_SCOPE_HOST; | |
3967 | else if (ifa_scope & IFA_LINK) | |
3968 | return RT_SCOPE_LINK; | |
3969 | else if (ifa_scope & IFA_SITE) | |
3970 | return RT_SCOPE_SITE; | |
3971 | else | |
3972 | return RT_SCOPE_UNIVERSE; | |
3973 | } | |
3974 | ||
0ab6803b TG |
3975 | static inline int inet6_ifaddr_msgsize(void) |
3976 | { | |
339bf98f TG |
3977 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
3978 | + nla_total_size(16) /* IFA_ADDRESS */ | |
3979 | + nla_total_size(sizeof(struct ifa_cacheinfo)); | |
0ab6803b | 3980 | } |
c5396a31 | 3981 | |
1da177e4 | 3982 | static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, |
15e47304 | 3983 | u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3984 | { |
1da177e4 | 3985 | struct nlmsghdr *nlh; |
85486af0 | 3986 | u32 preferred, valid; |
1da177e4 | 3987 | |
15e47304 | 3988 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
0ab6803b | 3989 | if (nlh == NULL) |
26932566 | 3990 | return -EMSGSIZE; |
0ab6803b | 3991 | |
101bb229 TG |
3992 | put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), |
3993 | ifa->idev->dev->ifindex); | |
3994 | ||
1da177e4 | 3995 | if (!(ifa->flags&IFA_F_PERMANENT)) { |
85486af0 TG |
3996 | preferred = ifa->prefered_lft; |
3997 | valid = ifa->valid_lft; | |
3998 | if (preferred != INFINITY_LIFE_TIME) { | |
1da177e4 | 3999 | long tval = (jiffies - ifa->tstamp)/HZ; |
a1faa698 JR |
4000 | if (preferred > tval) |
4001 | preferred -= tval; | |
4002 | else | |
4003 | preferred = 0; | |
f56619fc BH |
4004 | if (valid != INFINITY_LIFE_TIME) { |
4005 | if (valid > tval) | |
4006 | valid -= tval; | |
4007 | else | |
4008 | valid = 0; | |
4009 | } | |
1da177e4 LT |
4010 | } |
4011 | } else { | |
85486af0 TG |
4012 | preferred = INFINITY_LIFE_TIME; |
4013 | valid = INFINITY_LIFE_TIME; | |
4014 | } | |
4015 | ||
0ab6803b | 4016 | if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 || |
26932566 PM |
4017 | put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) { |
4018 | nlmsg_cancel(skb, nlh); | |
4019 | return -EMSGSIZE; | |
4020 | } | |
1da177e4 | 4021 | |
0ab6803b | 4022 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
4023 | } |
4024 | ||
4025 | static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, | |
15e47304 | 4026 | u32 portid, u32 seq, int event, u16 flags) |
1da177e4 | 4027 | { |
1da177e4 | 4028 | struct nlmsghdr *nlh; |
101bb229 TG |
4029 | u8 scope = RT_SCOPE_UNIVERSE; |
4030 | int ifindex = ifmca->idev->dev->ifindex; | |
4031 | ||
4032 | if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE) | |
4033 | scope = RT_SCOPE_SITE; | |
1da177e4 | 4034 | |
15e47304 | 4035 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
0ab6803b | 4036 | if (nlh == NULL) |
26932566 | 4037 | return -EMSGSIZE; |
85486af0 | 4038 | |
0ab6803b TG |
4039 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
4040 | if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 || | |
4041 | put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp, | |
26932566 PM |
4042 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
4043 | nlmsg_cancel(skb, nlh); | |
4044 | return -EMSGSIZE; | |
4045 | } | |
85486af0 | 4046 | |
0ab6803b | 4047 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
4048 | } |
4049 | ||
4050 | static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, | |
15e47304 | 4051 | u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4 | 4052 | { |
1da177e4 | 4053 | struct nlmsghdr *nlh; |
101bb229 TG |
4054 | u8 scope = RT_SCOPE_UNIVERSE; |
4055 | int ifindex = ifaca->aca_idev->dev->ifindex; | |
4056 | ||
4057 | if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) | |
4058 | scope = RT_SCOPE_SITE; | |
1da177e4 | 4059 | |
15e47304 | 4060 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
0ab6803b | 4061 | if (nlh == NULL) |
26932566 | 4062 | return -EMSGSIZE; |
85486af0 | 4063 | |
0ab6803b TG |
4064 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
4065 | if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 || | |
4066 | put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp, | |
26932566 PM |
4067 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
4068 | nlmsg_cancel(skb, nlh); | |
4069 | return -EMSGSIZE; | |
4070 | } | |
1da177e4 | 4071 | |
0ab6803b | 4072 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
4073 | } |
4074 | ||
e21e8467 | 4075 | enum addr_type_t { |
1da177e4 LT |
4076 | UNICAST_ADDR, |
4077 | MULTICAST_ADDR, | |
4078 | ANYCAST_ADDR, | |
4079 | }; | |
4080 | ||
234b27c3 ED |
4081 | /* called with rcu_read_lock() */ |
4082 | static int in6_dump_addrs(struct inet6_dev *idev, struct sk_buff *skb, | |
4083 | struct netlink_callback *cb, enum addr_type_t type, | |
4084 | int s_ip_idx, int *p_ip_idx) | |
4085 | { | |
234b27c3 ED |
4086 | struct ifmcaddr6 *ifmca; |
4087 | struct ifacaddr6 *ifaca; | |
4088 | int err = 1; | |
4089 | int ip_idx = *p_ip_idx; | |
4090 | ||
4091 | read_lock_bh(&idev->lock); | |
4092 | switch (type) { | |
502a2ffd | 4093 | case UNICAST_ADDR: { |
4094 | struct inet6_ifaddr *ifa; | |
4095 | ||
234b27c3 | 4096 | /* unicast address incl. temp addr */ |
502a2ffd | 4097 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
4098 | if (++ip_idx < s_ip_idx) | |
234b27c3 ED |
4099 | continue; |
4100 | err = inet6_fill_ifaddr(skb, ifa, | |
15e47304 | 4101 | NETLINK_CB(cb->skb).portid, |
234b27c3 ED |
4102 | cb->nlh->nlmsg_seq, |
4103 | RTM_NEWADDR, | |
4104 | NLM_F_MULTI); | |
4105 | if (err <= 0) | |
4106 | break; | |
63998ac2 | 4107 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
234b27c3 ED |
4108 | } |
4109 | break; | |
502a2ffd | 4110 | } |
234b27c3 ED |
4111 | case MULTICAST_ADDR: |
4112 | /* multicast address */ | |
4113 | for (ifmca = idev->mc_list; ifmca; | |
4114 | ifmca = ifmca->next, ip_idx++) { | |
4115 | if (ip_idx < s_ip_idx) | |
4116 | continue; | |
4117 | err = inet6_fill_ifmcaddr(skb, ifmca, | |
15e47304 | 4118 | NETLINK_CB(cb->skb).portid, |
234b27c3 ED |
4119 | cb->nlh->nlmsg_seq, |
4120 | RTM_GETMULTICAST, | |
4121 | NLM_F_MULTI); | |
4122 | if (err <= 0) | |
4123 | break; | |
4124 | } | |
4125 | break; | |
4126 | case ANYCAST_ADDR: | |
4127 | /* anycast address */ | |
4128 | for (ifaca = idev->ac_list; ifaca; | |
4129 | ifaca = ifaca->aca_next, ip_idx++) { | |
4130 | if (ip_idx < s_ip_idx) | |
4131 | continue; | |
4132 | err = inet6_fill_ifacaddr(skb, ifaca, | |
15e47304 | 4133 | NETLINK_CB(cb->skb).portid, |
234b27c3 ED |
4134 | cb->nlh->nlmsg_seq, |
4135 | RTM_GETANYCAST, | |
4136 | NLM_F_MULTI); | |
4137 | if (err <= 0) | |
4138 | break; | |
4139 | } | |
4140 | break; | |
4141 | default: | |
4142 | break; | |
4143 | } | |
4144 | read_unlock_bh(&idev->lock); | |
4145 | *p_ip_idx = ip_idx; | |
4146 | return err; | |
4147 | } | |
4148 | ||
1da177e4 LT |
4149 | static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, |
4150 | enum addr_type_t type) | |
4151 | { | |
234b27c3 ED |
4152 | struct net *net = sock_net(skb->sk); |
4153 | int h, s_h; | |
1da177e4 LT |
4154 | int idx, ip_idx; |
4155 | int s_idx, s_ip_idx; | |
1da177e4 | 4156 | struct net_device *dev; |
234b27c3 ED |
4157 | struct inet6_dev *idev; |
4158 | struct hlist_head *head; | |
1ab1457c | 4159 | |
234b27c3 ED |
4160 | s_h = cb->args[0]; |
4161 | s_idx = idx = cb->args[1]; | |
4162 | s_ip_idx = ip_idx = cb->args[2]; | |
5d5619b4 | 4163 | |
234b27c3 | 4164 | rcu_read_lock(); |
63998ac2 | 4165 | cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^ net->dev_base_seq; |
234b27c3 ED |
4166 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { |
4167 | idx = 0; | |
4168 | head = &net->dev_index_head[h]; | |
b67bfe0d | 4169 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
234b27c3 ED |
4170 | if (idx < s_idx) |
4171 | goto cont; | |
4b97efdf | 4172 | if (h > s_h || idx > s_idx) |
234b27c3 ED |
4173 | s_ip_idx = 0; |
4174 | ip_idx = 0; | |
e21e8467 SH |
4175 | idev = __in6_dev_get(dev); |
4176 | if (!idev) | |
234b27c3 ED |
4177 | goto cont; |
4178 | ||
4179 | if (in6_dump_addrs(idev, skb, cb, type, | |
4180 | s_ip_idx, &ip_idx) <= 0) | |
4181 | goto done; | |
7562f876 | 4182 | cont: |
234b27c3 ED |
4183 | idx++; |
4184 | } | |
1da177e4 | 4185 | } |
234b27c3 ED |
4186 | done: |
4187 | rcu_read_unlock(); | |
4188 | cb->args[0] = h; | |
4189 | cb->args[1] = idx; | |
4190 | cb->args[2] = ip_idx; | |
4191 | ||
1da177e4 LT |
4192 | return skb->len; |
4193 | } | |
4194 | ||
4195 | static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
4196 | { | |
4197 | enum addr_type_t type = UNICAST_ADDR; | |
b854272b | 4198 | |
1da177e4 LT |
4199 | return inet6_dump_addr(skb, cb, type); |
4200 | } | |
4201 | ||
4202 | static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
4203 | { | |
4204 | enum addr_type_t type = MULTICAST_ADDR; | |
b854272b | 4205 | |
1da177e4 LT |
4206 | return inet6_dump_addr(skb, cb, type); |
4207 | } | |
4208 | ||
4209 | ||
4210 | static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
4211 | { | |
4212 | enum addr_type_t type = ANYCAST_ADDR; | |
b854272b | 4213 | |
1da177e4 LT |
4214 | return inet6_dump_addr(skb, cb, type); |
4215 | } | |
4216 | ||
661d2967 | 4217 | static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr *nlh) |
6c223828 | 4218 | { |
3b1e0a65 | 4219 | struct net *net = sock_net(in_skb->sk); |
1b29fc2c TG |
4220 | struct ifaddrmsg *ifm; |
4221 | struct nlattr *tb[IFA_MAX+1]; | |
6c223828 NT |
4222 | struct in6_addr *addr = NULL; |
4223 | struct net_device *dev = NULL; | |
4224 | struct inet6_ifaddr *ifa; | |
4225 | struct sk_buff *skb; | |
6c223828 NT |
4226 | int err; |
4227 | ||
1b29fc2c TG |
4228 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
4229 | if (err < 0) | |
4230 | goto errout; | |
4231 | ||
4232 | addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]); | |
4233 | if (addr == NULL) { | |
4234 | err = -EINVAL; | |
4235 | goto errout; | |
6c223828 | 4236 | } |
6c223828 | 4237 | |
1b29fc2c | 4238 | ifm = nlmsg_data(nlh); |
6c223828 | 4239 | if (ifm->ifa_index) |
6fda7350 | 4240 | dev = __dev_get_by_index(net, ifm->ifa_index); |
6c223828 | 4241 | |
e21e8467 SH |
4242 | ifa = ipv6_get_ifaddr(net, addr, dev, 1); |
4243 | if (!ifa) { | |
1b29fc2c TG |
4244 | err = -EADDRNOTAVAIL; |
4245 | goto errout; | |
4246 | } | |
6c223828 | 4247 | |
e21e8467 SH |
4248 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL); |
4249 | if (!skb) { | |
6c223828 | 4250 | err = -ENOBUFS; |
1b29fc2c | 4251 | goto errout_ifa; |
6c223828 NT |
4252 | } |
4253 | ||
15e47304 | 4254 | err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).portid, |
6c223828 | 4255 | nlh->nlmsg_seq, RTM_NEWADDR, 0); |
26932566 PM |
4256 | if (err < 0) { |
4257 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
4258 | WARN_ON(err == -EMSGSIZE); | |
4259 | kfree_skb(skb); | |
4260 | goto errout_ifa; | |
4261 | } | |
15e47304 | 4262 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); |
1b29fc2c | 4263 | errout_ifa: |
6c223828 | 4264 | in6_ifa_put(ifa); |
1b29fc2c | 4265 | errout: |
6c223828 | 4266 | return err; |
6c223828 NT |
4267 | } |
4268 | ||
1da177e4 LT |
4269 | static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) |
4270 | { | |
4271 | struct sk_buff *skb; | |
c346dca1 | 4272 | struct net *net = dev_net(ifa->idev->dev); |
5d620266 | 4273 | int err = -ENOBUFS; |
1da177e4 | 4274 | |
0ab6803b | 4275 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); |
5d620266 TG |
4276 | if (skb == NULL) |
4277 | goto errout; | |
4278 | ||
4279 | err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0); | |
26932566 PM |
4280 | if (err < 0) { |
4281 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
4282 | WARN_ON(err == -EMSGSIZE); | |
4283 | kfree_skb(skb); | |
4284 | goto errout; | |
4285 | } | |
1ce85fe4 PNA |
4286 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
4287 | return; | |
5d620266 TG |
4288 | errout: |
4289 | if (err < 0) | |
6fda7350 | 4290 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); |
1da177e4 LT |
4291 | } |
4292 | ||
b6f99a21 | 4293 | static inline void ipv6_store_devconf(struct ipv6_devconf *cnf, |
1da177e4 LT |
4294 | __s32 *array, int bytes) |
4295 | { | |
04561c1f TG |
4296 | BUG_ON(bytes < (DEVCONF_MAX * 4)); |
4297 | ||
1da177e4 LT |
4298 | memset(array, 0, bytes); |
4299 | array[DEVCONF_FORWARDING] = cnf->forwarding; | |
4300 | array[DEVCONF_HOPLIMIT] = cnf->hop_limit; | |
4301 | array[DEVCONF_MTU6] = cnf->mtu6; | |
4302 | array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; | |
4303 | array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; | |
4304 | array[DEVCONF_AUTOCONF] = cnf->autoconf; | |
4305 | array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; | |
4306 | array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; | |
93908d19 TG |
4307 | array[DEVCONF_RTR_SOLICIT_INTERVAL] = |
4308 | jiffies_to_msecs(cnf->rtr_solicit_interval); | |
4309 | array[DEVCONF_RTR_SOLICIT_DELAY] = | |
4310 | jiffies_to_msecs(cnf->rtr_solicit_delay); | |
1da177e4 LT |
4311 | array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; |
4312 | #ifdef CONFIG_IPV6_PRIVACY | |
4313 | array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; | |
4314 | array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; | |
4315 | array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; | |
4316 | array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; | |
4317 | array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; | |
4318 | #endif | |
4319 | array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; | |
65f5c7c1 | 4320 | array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; |
c4fd30eb | 4321 | array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; |
930d6ff2 YH |
4322 | #ifdef CONFIG_IPV6_ROUTER_PREF |
4323 | array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; | |
93908d19 TG |
4324 | array[DEVCONF_RTR_PROBE_INTERVAL] = |
4325 | jiffies_to_msecs(cnf->rtr_probe_interval); | |
fa03ef38 | 4326 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 YH |
4327 | array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; |
4328 | #endif | |
930d6ff2 | 4329 | #endif |
6fa3eb70 | 4330 | array[DEVCONF_ACCEPT_RA_RT_TABLE] = cnf->accept_ra_rt_table; |
fbea49e1 | 4331 | array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp; |
0bcbc926 | 4332 | array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route; |
95c385b4 NH |
4333 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
4334 | array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad; | |
4335 | #endif | |
7bc570c8 YH |
4336 | #ifdef CONFIG_IPV6_MROUTE |
4337 | array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding; | |
4338 | #endif | |
778d80be | 4339 | array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6; |
1b34be74 | 4340 | array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad; |
c3faca05 | 4341 | array[DEVCONF_FORCE_TLLAO] = cnf->force_tllao; |
5cb04436 | 4342 | array[DEVCONF_NDISC_NOTIFY] = cnf->ndisc_notify; |
6fa3eb70 S |
4343 | #ifdef CONFIG_MTK_DHCPV6C_WIFI |
4344 | array[DEVCONF_RA_INFO_FLAG] = cnf->ra_info_flag; | |
4345 | #endif | |
1da177e4 LT |
4346 | } |
4347 | ||
b382b191 TG |
4348 | static inline size_t inet6_ifla6_size(void) |
4349 | { | |
4350 | return nla_total_size(4) /* IFLA_INET6_FLAGS */ | |
4351 | + nla_total_size(sizeof(struct ifla_cacheinfo)) | |
4352 | + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */ | |
4353 | + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */ | |
f53adae4 DB |
4354 | + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */ |
4355 | + nla_total_size(sizeof(struct in6_addr)); /* IFLA_INET6_TOKEN */ | |
b382b191 TG |
4356 | } |
4357 | ||
339bf98f TG |
4358 | static inline size_t inet6_if_nlmsg_size(void) |
4359 | { | |
4360 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
4361 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
4362 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ | |
4363 | + nla_total_size(4) /* IFLA_MTU */ | |
4364 | + nla_total_size(4) /* IFLA_LINK */ | |
b382b191 | 4365 | + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */ |
339bf98f | 4366 | } |
c5396a31 | 4367 | |
be281e55 | 4368 | static inline void __snmp6_fill_statsdev(u64 *stats, atomic_long_t *mib, |
7d720c3e | 4369 | int items, int bytes) |
7f7d9a6b HX |
4370 | { |
4371 | int i; | |
4372 | int pad = bytes - sizeof(u64) * items; | |
4373 | BUG_ON(pad < 0); | |
4374 | ||
4375 | /* Use put_unaligned() because stats may not be aligned for u64. */ | |
4376 | put_unaligned(items, &stats[0]); | |
4377 | for (i = 1; i < items; i++) | |
be281e55 | 4378 | put_unaligned(atomic_long_read(&mib[i]), &stats[i]); |
7f7d9a6b HX |
4379 | |
4380 | memset(&stats[items], 0, pad); | |
4381 | } | |
4382 | ||
4ce3c183 ED |
4383 | static inline void __snmp6_fill_stats64(u64 *stats, void __percpu **mib, |
4384 | int items, int bytes, size_t syncpoff) | |
4385 | { | |
4386 | int i; | |
4387 | int pad = bytes - sizeof(u64) * items; | |
4388 | BUG_ON(pad < 0); | |
4389 | ||
4390 | /* Use put_unaligned() because stats may not be aligned for u64. */ | |
4391 | put_unaligned(items, &stats[0]); | |
4392 | for (i = 1; i < items; i++) | |
4393 | put_unaligned(snmp_fold_field64(mib, i, syncpoff), &stats[i]); | |
4394 | ||
4395 | memset(&stats[items], 0, pad); | |
4396 | } | |
4397 | ||
7f7d9a6b HX |
4398 | static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype, |
4399 | int bytes) | |
4400 | { | |
e21e8467 | 4401 | switch (attrtype) { |
7f7d9a6b | 4402 | case IFLA_INET6_STATS: |
4ce3c183 ED |
4403 | __snmp6_fill_stats64(stats, (void __percpu **)idev->stats.ipv6, |
4404 | IPSTATS_MIB_MAX, bytes, offsetof(struct ipstats_mib, syncp)); | |
7f7d9a6b HX |
4405 | break; |
4406 | case IFLA_INET6_ICMP6STATS: | |
be281e55 | 4407 | __snmp6_fill_statsdev(stats, idev->stats.icmpv6dev->mibs, ICMP6_MIB_MAX, bytes); |
7f7d9a6b HX |
4408 | break; |
4409 | } | |
4410 | } | |
4411 | ||
b382b191 TG |
4412 | static int inet6_fill_ifla6_attrs(struct sk_buff *skb, struct inet6_dev *idev) |
4413 | { | |
4414 | struct nlattr *nla; | |
4415 | struct ifla_cacheinfo ci; | |
4416 | ||
c78679e8 DM |
4417 | if (nla_put_u32(skb, IFLA_INET6_FLAGS, idev->if_flags)) |
4418 | goto nla_put_failure; | |
b382b191 | 4419 | ci.max_reasm_len = IPV6_MAXPLEN; |
24912420 DM |
4420 | ci.tstamp = cstamp_delta(idev->tstamp); |
4421 | ci.reachable_time = jiffies_to_msecs(idev->nd_parms->reachable_time); | |
4422 | ci.retrans_time = jiffies_to_msecs(idev->nd_parms->retrans_time); | |
c78679e8 DM |
4423 | if (nla_put(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci)) |
4424 | goto nla_put_failure; | |
b382b191 TG |
4425 | nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32)); |
4426 | if (nla == NULL) | |
4427 | goto nla_put_failure; | |
4428 | ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla)); | |
4429 | ||
4430 | /* XXX - MC not implemented */ | |
4431 | ||
4432 | nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64)); | |
4433 | if (nla == NULL) | |
4434 | goto nla_put_failure; | |
4435 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla)); | |
4436 | ||
4437 | nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64)); | |
4438 | if (nla == NULL) | |
4439 | goto nla_put_failure; | |
4440 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla)); | |
4441 | ||
f53adae4 DB |
4442 | nla = nla_reserve(skb, IFLA_INET6_TOKEN, sizeof(struct in6_addr)); |
4443 | if (nla == NULL) | |
4444 | goto nla_put_failure; | |
4445 | read_lock_bh(&idev->lock); | |
4446 | memcpy(nla_data(nla), idev->token.s6_addr, nla_len(nla)); | |
4447 | read_unlock_bh(&idev->lock); | |
4448 | ||
b382b191 TG |
4449 | return 0; |
4450 | ||
4451 | nla_put_failure: | |
4452 | return -EMSGSIZE; | |
4453 | } | |
4454 | ||
4455 | static size_t inet6_get_link_af_size(const struct net_device *dev) | |
4456 | { | |
4457 | if (!__in6_dev_get(dev)) | |
4458 | return 0; | |
4459 | ||
4460 | return inet6_ifla6_size(); | |
4461 | } | |
4462 | ||
4463 | static int inet6_fill_link_af(struct sk_buff *skb, const struct net_device *dev) | |
4464 | { | |
4465 | struct inet6_dev *idev = __in6_dev_get(dev); | |
4466 | ||
4467 | if (!idev) | |
4468 | return -ENODATA; | |
4469 | ||
4470 | if (inet6_fill_ifla6_attrs(skb, idev) < 0) | |
4471 | return -EMSGSIZE; | |
4472 | ||
4473 | return 0; | |
4474 | } | |
4475 | ||
f53adae4 DB |
4476 | static int inet6_set_iftoken(struct inet6_dev *idev, struct in6_addr *token) |
4477 | { | |
f53adae4 DB |
4478 | struct inet6_ifaddr *ifp; |
4479 | struct net_device *dev = idev->dev; | |
fc403832 | 4480 | bool update_rs = false; |
dc848292 | 4481 | struct in6_addr ll_addr; |
f53adae4 | 4482 | |
835b474b HFS |
4483 | ASSERT_RTNL(); |
4484 | ||
f53adae4 DB |
4485 | if (token == NULL) |
4486 | return -EINVAL; | |
4487 | if (ipv6_addr_any(token)) | |
4488 | return -EINVAL; | |
4489 | if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) | |
4490 | return -EINVAL; | |
f53adae4 DB |
4491 | if (!ipv6_accept_ra(idev)) |
4492 | return -EINVAL; | |
4493 | if (idev->cnf.rtr_solicits <= 0) | |
4494 | return -EINVAL; | |
4495 | ||
4496 | write_lock_bh(&idev->lock); | |
4497 | ||
4498 | BUILD_BUG_ON(sizeof(token->s6_addr) != 16); | |
4499 | memcpy(idev->token.s6_addr + 8, token->s6_addr + 8, 8); | |
4500 | ||
4501 | write_unlock_bh(&idev->lock); | |
4502 | ||
dc848292 HFS |
4503 | if (!idev->dead && (idev->if_flags & IF_READY) && |
4504 | !ipv6_get_lladdr(dev, &ll_addr, IFA_F_TENTATIVE | | |
4505 | IFA_F_OPTIMISTIC)) { | |
fc403832 DB |
4506 | |
4507 | /* If we're not ready, then normal ifup will take care | |
4508 | * of this. Otherwise, we need to request our rs here. | |
4509 | */ | |
4510 | ndisc_send_rs(dev, &ll_addr, &in6addr_linklocal_allrouters); | |
4511 | update_rs = true; | |
4512 | } | |
f53adae4 DB |
4513 | |
4514 | write_lock_bh(&idev->lock); | |
fc403832 DB |
4515 | |
4516 | if (update_rs) | |
4517 | idev->if_flags |= IF_RS_SENT; | |
f53adae4 DB |
4518 | |
4519 | /* Well, that's kinda nasty ... */ | |
4520 | list_for_each_entry(ifp, &idev->addr_list, if_list) { | |
4521 | spin_lock(&ifp->lock); | |
617fe29d | 4522 | if (ifp->tokenized) { |
f53adae4 DB |
4523 | ifp->valid_lft = 0; |
4524 | ifp->prefered_lft = 0; | |
4525 | } | |
4526 | spin_unlock(&ifp->lock); | |
4527 | } | |
4528 | ||
4529 | write_unlock_bh(&idev->lock); | |
835b474b | 4530 | addrconf_verify_rtnl(); |
f53adae4 DB |
4531 | return 0; |
4532 | } | |
4533 | ||
4534 | static int inet6_set_link_af(struct net_device *dev, const struct nlattr *nla) | |
4535 | { | |
4536 | int err = -EINVAL; | |
4537 | struct inet6_dev *idev = __in6_dev_get(dev); | |
4538 | struct nlattr *tb[IFLA_INET6_MAX + 1]; | |
4539 | ||
4540 | if (!idev) | |
4541 | return -EAFNOSUPPORT; | |
4542 | ||
4543 | if (nla_parse_nested(tb, IFLA_INET6_MAX, nla, NULL) < 0) | |
4544 | BUG(); | |
4545 | ||
4546 | if (tb[IFLA_INET6_TOKEN]) | |
4547 | err = inet6_set_iftoken(idev, nla_data(tb[IFLA_INET6_TOKEN])); | |
4548 | ||
4549 | return err; | |
4550 | } | |
4551 | ||
1ab1457c | 4552 | static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, |
15e47304 | 4553 | u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4 | 4554 | { |
04561c1f | 4555 | struct net_device *dev = idev->dev; |
04561c1f TG |
4556 | struct ifinfomsg *hdr; |
4557 | struct nlmsghdr *nlh; | |
4558 | void *protoinfo; | |
04561c1f | 4559 | |
15e47304 | 4560 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*hdr), flags); |
04561c1f | 4561 | if (nlh == NULL) |
26932566 | 4562 | return -EMSGSIZE; |
04561c1f TG |
4563 | |
4564 | hdr = nlmsg_data(nlh); | |
4565 | hdr->ifi_family = AF_INET6; | |
4566 | hdr->__ifi_pad = 0; | |
4567 | hdr->ifi_type = dev->type; | |
4568 | hdr->ifi_index = dev->ifindex; | |
4569 | hdr->ifi_flags = dev_get_flags(dev); | |
4570 | hdr->ifi_change = 0; | |
4571 | ||
c78679e8 DM |
4572 | if (nla_put_string(skb, IFLA_IFNAME, dev->name) || |
4573 | (dev->addr_len && | |
4574 | nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || | |
4575 | nla_put_u32(skb, IFLA_MTU, dev->mtu) || | |
4576 | (dev->ifindex != dev->iflink && | |
4577 | nla_put_u32(skb, IFLA_LINK, dev->iflink))) | |
4578 | goto nla_put_failure; | |
04561c1f TG |
4579 | protoinfo = nla_nest_start(skb, IFLA_PROTINFO); |
4580 | if (protoinfo == NULL) | |
4581 | goto nla_put_failure; | |
1da177e4 | 4582 | |
b382b191 | 4583 | if (inet6_fill_ifla6_attrs(skb, idev) < 0) |
bf99f1bd | 4584 | goto nla_put_failure; |
1da177e4 | 4585 | |
04561c1f TG |
4586 | nla_nest_end(skb, protoinfo); |
4587 | return nlmsg_end(skb, nlh); | |
1da177e4 | 4588 | |
04561c1f | 4589 | nla_put_failure: |
26932566 PM |
4590 | nlmsg_cancel(skb, nlh); |
4591 | return -EMSGSIZE; | |
1da177e4 LT |
4592 | } |
4593 | ||
4594 | static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) | |
4595 | { | |
3b1e0a65 | 4596 | struct net *net = sock_net(skb->sk); |
84d2697d | 4597 | int h, s_h; |
434a8a58 | 4598 | int idx = 0, s_idx; |
1da177e4 LT |
4599 | struct net_device *dev; |
4600 | struct inet6_dev *idev; | |
84d2697d | 4601 | struct hlist_head *head; |
1da177e4 | 4602 | |
84d2697d ED |
4603 | s_h = cb->args[0]; |
4604 | s_idx = cb->args[1]; | |
4605 | ||
4606 | rcu_read_lock(); | |
4607 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
4608 | idx = 0; | |
4609 | head = &net->dev_index_head[h]; | |
b67bfe0d | 4610 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
84d2697d ED |
4611 | if (idx < s_idx) |
4612 | goto cont; | |
4613 | idev = __in6_dev_get(dev); | |
4614 | if (!idev) | |
4615 | goto cont; | |
4616 | if (inet6_fill_ifinfo(skb, idev, | |
15e47304 | 4617 | NETLINK_CB(cb->skb).portid, |
84d2697d ED |
4618 | cb->nlh->nlmsg_seq, |
4619 | RTM_NEWLINK, NLM_F_MULTI) <= 0) | |
4620 | goto out; | |
7562f876 | 4621 | cont: |
84d2697d ED |
4622 | idx++; |
4623 | } | |
1da177e4 | 4624 | } |
84d2697d ED |
4625 | out: |
4626 | rcu_read_unlock(); | |
4627 | cb->args[1] = idx; | |
4628 | cb->args[0] = h; | |
1da177e4 LT |
4629 | |
4630 | return skb->len; | |
4631 | } | |
4632 | ||
4633 | void inet6_ifinfo_notify(int event, struct inet6_dev *idev) | |
4634 | { | |
4635 | struct sk_buff *skb; | |
c346dca1 | 4636 | struct net *net = dev_net(idev->dev); |
8d7a76c9 | 4637 | int err = -ENOBUFS; |
1ab1457c | 4638 | |
339bf98f | 4639 | skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC); |
8d7a76c9 TG |
4640 | if (skb == NULL) |
4641 | goto errout; | |
4642 | ||
4643 | err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); | |
26932566 PM |
4644 | if (err < 0) { |
4645 | /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */ | |
4646 | WARN_ON(err == -EMSGSIZE); | |
4647 | kfree_skb(skb); | |
4648 | goto errout; | |
4649 | } | |
5f75a104 | 4650 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFINFO, NULL, GFP_ATOMIC); |
1ce85fe4 | 4651 | return; |
8d7a76c9 TG |
4652 | errout: |
4653 | if (err < 0) | |
5f75a104 | 4654 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFINFO, err); |
1da177e4 LT |
4655 | } |
4656 | ||
339bf98f TG |
4657 | static inline size_t inet6_prefix_nlmsg_size(void) |
4658 | { | |
4659 | return NLMSG_ALIGN(sizeof(struct prefixmsg)) | |
4660 | + nla_total_size(sizeof(struct in6_addr)) | |
4661 | + nla_total_size(sizeof(struct prefix_cacheinfo)); | |
4662 | } | |
c5396a31 | 4663 | |
1da177e4 | 4664 | static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, |
15e47304 | 4665 | struct prefix_info *pinfo, u32 portid, u32 seq, |
6051e2f4 | 4666 | int event, unsigned int flags) |
1da177e4 | 4667 | { |
6051e2f4 TG |
4668 | struct prefixmsg *pmsg; |
4669 | struct nlmsghdr *nlh; | |
1da177e4 LT |
4670 | struct prefix_cacheinfo ci; |
4671 | ||
15e47304 | 4672 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*pmsg), flags); |
6051e2f4 | 4673 | if (nlh == NULL) |
26932566 | 4674 | return -EMSGSIZE; |
6051e2f4 TG |
4675 | |
4676 | pmsg = nlmsg_data(nlh); | |
1da177e4 | 4677 | pmsg->prefix_family = AF_INET6; |
8a47077a PM |
4678 | pmsg->prefix_pad1 = 0; |
4679 | pmsg->prefix_pad2 = 0; | |
1da177e4 LT |
4680 | pmsg->prefix_ifindex = idev->dev->ifindex; |
4681 | pmsg->prefix_len = pinfo->prefix_len; | |
4682 | pmsg->prefix_type = pinfo->type; | |
8a47077a | 4683 | pmsg->prefix_pad3 = 0; |
1da177e4 LT |
4684 | pmsg->prefix_flags = 0; |
4685 | if (pinfo->onlink) | |
4686 | pmsg->prefix_flags |= IF_PREFIX_ONLINK; | |
4687 | if (pinfo->autoconf) | |
4688 | pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; | |
4689 | ||
c78679e8 DM |
4690 | if (nla_put(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix)) |
4691 | goto nla_put_failure; | |
1da177e4 LT |
4692 | ci.preferred_time = ntohl(pinfo->prefered); |
4693 | ci.valid_time = ntohl(pinfo->valid); | |
c78679e8 DM |
4694 | if (nla_put(skb, PREFIX_CACHEINFO, sizeof(ci), &ci)) |
4695 | goto nla_put_failure; | |
6051e2f4 | 4696 | return nlmsg_end(skb, nlh); |
1da177e4 | 4697 | |
6051e2f4 | 4698 | nla_put_failure: |
26932566 PM |
4699 | nlmsg_cancel(skb, nlh); |
4700 | return -EMSGSIZE; | |
1da177e4 LT |
4701 | } |
4702 | ||
1ab1457c | 4703 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 LT |
4704 | struct prefix_info *pinfo) |
4705 | { | |
4706 | struct sk_buff *skb; | |
c346dca1 | 4707 | struct net *net = dev_net(idev->dev); |
8c384bfa | 4708 | int err = -ENOBUFS; |
1da177e4 | 4709 | |
339bf98f | 4710 | skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC); |
8c384bfa TG |
4711 | if (skb == NULL) |
4712 | goto errout; | |
4713 | ||
4714 | err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); | |
26932566 PM |
4715 | if (err < 0) { |
4716 | /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */ | |
4717 | WARN_ON(err == -EMSGSIZE); | |
4718 | kfree_skb(skb); | |
4719 | goto errout; | |
4720 | } | |
1ce85fe4 PNA |
4721 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); |
4722 | return; | |
8c384bfa TG |
4723 | errout: |
4724 | if (err < 0) | |
6fda7350 | 4725 | rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err); |
1da177e4 LT |
4726 | } |
4727 | ||
1da177e4 LT |
4728 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) |
4729 | { | |
63998ac2 ND |
4730 | struct net *net = dev_net(ifp->idev->dev); |
4731 | ||
835b474b HFS |
4732 | if (event) |
4733 | ASSERT_RTNL(); | |
4734 | ||
1da177e4 LT |
4735 | inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); |
4736 | ||
4737 | switch (event) { | |
4738 | case RTM_NEWADDR: | |
95c385b4 NH |
4739 | /* |
4740 | * If the address was optimistic | |
4741 | * we inserted the route at the start of | |
4742 | * our DAD process, so we don't need | |
4743 | * to do it again | |
4744 | */ | |
4745 | if (!(ifp->rt->rt6i_node)) | |
4746 | ip6_ins_rt(ifp->rt); | |
1da177e4 LT |
4747 | if (ifp->idev->cnf.forwarding) |
4748 | addrconf_join_anycast(ifp); | |
4749 | break; | |
4750 | case RTM_DELADDR: | |
4751 | if (ifp->idev->cnf.forwarding) | |
4752 | addrconf_leave_anycast(ifp); | |
4753 | addrconf_leave_solict(ifp->idev, &ifp->addr); | |
d8d1f30b | 4754 | dst_hold(&ifp->rt->dst); |
93fa159a | 4755 | |
73a8bd74 | 4756 | if (ip6_del_rt(ifp->rt)) |
d8d1f30b | 4757 | dst_free(&ifp->rt->dst); |
1da177e4 LT |
4758 | break; |
4759 | } | |
63998ac2 | 4760 | atomic_inc(&net->ipv6.dev_addr_genid); |
1da177e4 LT |
4761 | } |
4762 | ||
4763 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) | |
4764 | { | |
8814c4b5 | 4765 | rcu_read_lock_bh(); |
1da177e4 LT |
4766 | if (likely(ifp->idev->dead == 0)) |
4767 | __ipv6_ifa_notify(event, ifp); | |
8814c4b5 | 4768 | rcu_read_unlock_bh(); |
1da177e4 LT |
4769 | } |
4770 | ||
4771 | #ifdef CONFIG_SYSCTL | |
4772 | ||
4773 | static | |
8d65af78 | 4774 | int addrconf_sysctl_forward(ctl_table *ctl, int write, |
1da177e4 LT |
4775 | void __user *buffer, size_t *lenp, loff_t *ppos) |
4776 | { | |
4777 | int *valp = ctl->data; | |
4778 | int val = *valp; | |
88af182e | 4779 | loff_t pos = *ppos; |
013d97e9 | 4780 | ctl_table lctl; |
1da177e4 LT |
4781 | int ret; |
4782 | ||
013d97e9 FR |
4783 | /* |
4784 | * ctl->data points to idev->cnf.forwarding, we should | |
4785 | * not modify it until we get the rtnl lock. | |
4786 | */ | |
4787 | lctl = *ctl; | |
4788 | lctl.data = &val; | |
4789 | ||
4790 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); | |
1da177e4 | 4791 | |
c8fecf22 | 4792 | if (write) |
b325fddb | 4793 | ret = addrconf_fixup_forwarding(ctl, valp, val); |
88af182e EB |
4794 | if (ret) |
4795 | *ppos = pos; | |
1ab1457c | 4796 | return ret; |
1da177e4 LT |
4797 | } |
4798 | ||
56d417b1 BH |
4799 | static void dev_disable_change(struct inet6_dev *idev) |
4800 | { | |
4801 | if (!idev || !idev->dev) | |
4802 | return; | |
4803 | ||
4804 | if (idev->cnf.disable_ipv6) | |
4805 | addrconf_notify(NULL, NETDEV_DOWN, idev->dev); | |
4806 | else | |
4807 | addrconf_notify(NULL, NETDEV_UP, idev->dev); | |
4808 | } | |
4809 | ||
4810 | static void addrconf_disable_change(struct net *net, __s32 newf) | |
4811 | { | |
4812 | struct net_device *dev; | |
4813 | struct inet6_dev *idev; | |
4814 | ||
cba3e28f | 4815 | for_each_netdev(net, dev) { |
56d417b1 BH |
4816 | idev = __in6_dev_get(dev); |
4817 | if (idev) { | |
4818 | int changed = (!idev->cnf.disable_ipv6) ^ (!newf); | |
4819 | idev->cnf.disable_ipv6 = newf; | |
4820 | if (changed) | |
4821 | dev_disable_change(idev); | |
4822 | } | |
56d417b1 | 4823 | } |
56d417b1 BH |
4824 | } |
4825 | ||
013d97e9 | 4826 | static int addrconf_disable_ipv6(struct ctl_table *table, int *p, int newf) |
56d417b1 BH |
4827 | { |
4828 | struct net *net; | |
013d97e9 FR |
4829 | int old; |
4830 | ||
4831 | if (!rtnl_trylock()) | |
4832 | return restart_syscall(); | |
56d417b1 BH |
4833 | |
4834 | net = (struct net *)table->extra2; | |
013d97e9 FR |
4835 | old = *p; |
4836 | *p = newf; | |
56d417b1 | 4837 | |
013d97e9 FR |
4838 | if (p == &net->ipv6.devconf_dflt->disable_ipv6) { |
4839 | rtnl_unlock(); | |
56d417b1 | 4840 | return 0; |
88af182e | 4841 | } |
56d417b1 BH |
4842 | |
4843 | if (p == &net->ipv6.devconf_all->disable_ipv6) { | |
56d417b1 BH |
4844 | net->ipv6.devconf_dflt->disable_ipv6 = newf; |
4845 | addrconf_disable_change(net, newf); | |
013d97e9 | 4846 | } else if ((!newf) ^ (!old)) |
56d417b1 BH |
4847 | dev_disable_change((struct inet6_dev *)table->extra1); |
4848 | ||
4849 | rtnl_unlock(); | |
4850 | return 0; | |
4851 | } | |
4852 | ||
4853 | static | |
8d65af78 | 4854 | int addrconf_sysctl_disable(ctl_table *ctl, int write, |
56d417b1 BH |
4855 | void __user *buffer, size_t *lenp, loff_t *ppos) |
4856 | { | |
4857 | int *valp = ctl->data; | |
4858 | int val = *valp; | |
88af182e | 4859 | loff_t pos = *ppos; |
013d97e9 | 4860 | ctl_table lctl; |
56d417b1 BH |
4861 | int ret; |
4862 | ||
013d97e9 FR |
4863 | /* |
4864 | * ctl->data points to idev->cnf.disable_ipv6, we should | |
4865 | * not modify it until we get the rtnl lock. | |
4866 | */ | |
4867 | lctl = *ctl; | |
4868 | lctl.data = &val; | |
4869 | ||
4870 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); | |
56d417b1 BH |
4871 | |
4872 | if (write) | |
4873 | ret = addrconf_disable_ipv6(ctl, valp, val); | |
88af182e EB |
4874 | if (ret) |
4875 | *ppos = pos; | |
56d417b1 BH |
4876 | return ret; |
4877 | } | |
4878 | ||
1da177e4 LT |
4879 | static struct addrconf_sysctl_table |
4880 | { | |
4881 | struct ctl_table_header *sysctl_header; | |
f6a07b29 | 4882 | ctl_table addrconf_vars[DEVCONF_MAX+1]; |
ab32ea5d | 4883 | } addrconf_sysctl __read_mostly = { |
1da177e4 LT |
4884 | .sysctl_header = NULL, |
4885 | .addrconf_vars = { | |
1ab1457c | 4886 | { |
e21e8467 SH |
4887 | .procname = "forwarding", |
4888 | .data = &ipv6_devconf.forwarding, | |
4889 | .maxlen = sizeof(int), | |
4890 | .mode = 0644, | |
4891 | .proc_handler = addrconf_sysctl_forward, | |
1da177e4 LT |
4892 | }, |
4893 | { | |
e21e8467 SH |
4894 | .procname = "hop_limit", |
4895 | .data = &ipv6_devconf.hop_limit, | |
4896 | .maxlen = sizeof(int), | |
4897 | .mode = 0644, | |
4898 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4899 | }, |
4900 | { | |
e21e8467 SH |
4901 | .procname = "mtu", |
4902 | .data = &ipv6_devconf.mtu6, | |
4903 | .maxlen = sizeof(int), | |
4904 | .mode = 0644, | |
4905 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4906 | }, |
4907 | { | |
e21e8467 SH |
4908 | .procname = "accept_ra", |
4909 | .data = &ipv6_devconf.accept_ra, | |
4910 | .maxlen = sizeof(int), | |
4911 | .mode = 0644, | |
4912 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4913 | }, |
4914 | { | |
e21e8467 SH |
4915 | .procname = "accept_redirects", |
4916 | .data = &ipv6_devconf.accept_redirects, | |
4917 | .maxlen = sizeof(int), | |
4918 | .mode = 0644, | |
4919 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4920 | }, |
4921 | { | |
e21e8467 SH |
4922 | .procname = "autoconf", |
4923 | .data = &ipv6_devconf.autoconf, | |
4924 | .maxlen = sizeof(int), | |
4925 | .mode = 0644, | |
4926 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4927 | }, |
4928 | { | |
e21e8467 SH |
4929 | .procname = "dad_transmits", |
4930 | .data = &ipv6_devconf.dad_transmits, | |
4931 | .maxlen = sizeof(int), | |
4932 | .mode = 0644, | |
4933 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4934 | }, |
4935 | { | |
e21e8467 SH |
4936 | .procname = "router_solicitations", |
4937 | .data = &ipv6_devconf.rtr_solicits, | |
4938 | .maxlen = sizeof(int), | |
4939 | .mode = 0644, | |
4940 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4941 | }, |
4942 | { | |
e21e8467 SH |
4943 | .procname = "router_solicitation_interval", |
4944 | .data = &ipv6_devconf.rtr_solicit_interval, | |
4945 | .maxlen = sizeof(int), | |
4946 | .mode = 0644, | |
4947 | .proc_handler = proc_dointvec_jiffies, | |
1da177e4 LT |
4948 | }, |
4949 | { | |
e21e8467 SH |
4950 | .procname = "router_solicitation_delay", |
4951 | .data = &ipv6_devconf.rtr_solicit_delay, | |
4952 | .maxlen = sizeof(int), | |
4953 | .mode = 0644, | |
4954 | .proc_handler = proc_dointvec_jiffies, | |
1da177e4 LT |
4955 | }, |
4956 | { | |
e21e8467 SH |
4957 | .procname = "force_mld_version", |
4958 | .data = &ipv6_devconf.force_mld_version, | |
4959 | .maxlen = sizeof(int), | |
4960 | .mode = 0644, | |
4961 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4962 | }, |
4963 | #ifdef CONFIG_IPV6_PRIVACY | |
4964 | { | |
e21e8467 SH |
4965 | .procname = "use_tempaddr", |
4966 | .data = &ipv6_devconf.use_tempaddr, | |
4967 | .maxlen = sizeof(int), | |
4968 | .mode = 0644, | |
4969 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4970 | }, |
4971 | { | |
e21e8467 SH |
4972 | .procname = "temp_valid_lft", |
4973 | .data = &ipv6_devconf.temp_valid_lft, | |
4974 | .maxlen = sizeof(int), | |
4975 | .mode = 0644, | |
4976 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4977 | }, |
4978 | { | |
e21e8467 SH |
4979 | .procname = "temp_prefered_lft", |
4980 | .data = &ipv6_devconf.temp_prefered_lft, | |
4981 | .maxlen = sizeof(int), | |
4982 | .mode = 0644, | |
4983 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4984 | }, |
4985 | { | |
e21e8467 SH |
4986 | .procname = "regen_max_retry", |
4987 | .data = &ipv6_devconf.regen_max_retry, | |
4988 | .maxlen = sizeof(int), | |
4989 | .mode = 0644, | |
4990 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4991 | }, |
4992 | { | |
e21e8467 SH |
4993 | .procname = "max_desync_factor", |
4994 | .data = &ipv6_devconf.max_desync_factor, | |
4995 | .maxlen = sizeof(int), | |
4996 | .mode = 0644, | |
4997 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4998 | }, |
4999 | #endif | |
5000 | { | |
e21e8467 SH |
5001 | .procname = "max_addresses", |
5002 | .data = &ipv6_devconf.max_addresses, | |
5003 | .maxlen = sizeof(int), | |
5004 | .mode = 0644, | |
5005 | .proc_handler = proc_dointvec, | |
1da177e4 | 5006 | }, |
65f5c7c1 | 5007 | { |
e21e8467 SH |
5008 | .procname = "accept_ra_defrtr", |
5009 | .data = &ipv6_devconf.accept_ra_defrtr, | |
5010 | .maxlen = sizeof(int), | |
5011 | .mode = 0644, | |
5012 | .proc_handler = proc_dointvec, | |
65f5c7c1 | 5013 | }, |
c4fd30eb | 5014 | { |
e21e8467 SH |
5015 | .procname = "accept_ra_pinfo", |
5016 | .data = &ipv6_devconf.accept_ra_pinfo, | |
5017 | .maxlen = sizeof(int), | |
5018 | .mode = 0644, | |
5019 | .proc_handler = proc_dointvec, | |
c4fd30eb | 5020 | }, |
930d6ff2 YH |
5021 | #ifdef CONFIG_IPV6_ROUTER_PREF |
5022 | { | |
e21e8467 SH |
5023 | .procname = "accept_ra_rtr_pref", |
5024 | .data = &ipv6_devconf.accept_ra_rtr_pref, | |
5025 | .maxlen = sizeof(int), | |
5026 | .mode = 0644, | |
5027 | .proc_handler = proc_dointvec, | |
930d6ff2 | 5028 | }, |
52e16356 | 5029 | { |
e21e8467 SH |
5030 | .procname = "router_probe_interval", |
5031 | .data = &ipv6_devconf.rtr_probe_interval, | |
5032 | .maxlen = sizeof(int), | |
5033 | .mode = 0644, | |
5034 | .proc_handler = proc_dointvec_jiffies, | |
52e16356 | 5035 | }, |
fa03ef38 | 5036 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 | 5037 | { |
e21e8467 SH |
5038 | .procname = "accept_ra_rt_info_max_plen", |
5039 | .data = &ipv6_devconf.accept_ra_rt_info_max_plen, | |
5040 | .maxlen = sizeof(int), | |
5041 | .mode = 0644, | |
5042 | .proc_handler = proc_dointvec, | |
09c884d4 YH |
5043 | }, |
5044 | #endif | |
930d6ff2 | 5045 | #endif |
6fa3eb70 S |
5046 | { |
5047 | .procname = "accept_ra_rt_table", | |
5048 | .data = &ipv6_devconf.accept_ra_rt_table, | |
5049 | .maxlen = sizeof(int), | |
5050 | .mode = 0644, | |
5051 | .proc_handler = proc_dointvec, | |
5052 | }, | |
fbea49e1 | 5053 | { |
e21e8467 SH |
5054 | .procname = "proxy_ndp", |
5055 | .data = &ipv6_devconf.proxy_ndp, | |
5056 | .maxlen = sizeof(int), | |
5057 | .mode = 0644, | |
5058 | .proc_handler = proc_dointvec, | |
fbea49e1 | 5059 | }, |
0bcbc926 | 5060 | { |
e21e8467 SH |
5061 | .procname = "accept_source_route", |
5062 | .data = &ipv6_devconf.accept_source_route, | |
5063 | .maxlen = sizeof(int), | |
5064 | .mode = 0644, | |
5065 | .proc_handler = proc_dointvec, | |
0bcbc926 | 5066 | }, |
95c385b4 NH |
5067 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
5068 | { | |
e21e8467 SH |
5069 | .procname = "optimistic_dad", |
5070 | .data = &ipv6_devconf.optimistic_dad, | |
5071 | .maxlen = sizeof(int), | |
5072 | .mode = 0644, | |
5073 | .proc_handler = proc_dointvec, | |
95c385b4 NH |
5074 | |
5075 | }, | |
7bc570c8 YH |
5076 | #endif |
5077 | #ifdef CONFIG_IPV6_MROUTE | |
5078 | { | |
e21e8467 SH |
5079 | .procname = "mc_forwarding", |
5080 | .data = &ipv6_devconf.mc_forwarding, | |
5081 | .maxlen = sizeof(int), | |
5082 | .mode = 0444, | |
5083 | .proc_handler = proc_dointvec, | |
7bc570c8 | 5084 | }, |
95c385b4 | 5085 | #endif |
778d80be | 5086 | { |
e21e8467 SH |
5087 | .procname = "disable_ipv6", |
5088 | .data = &ipv6_devconf.disable_ipv6, | |
5089 | .maxlen = sizeof(int), | |
5090 | .mode = 0644, | |
5091 | .proc_handler = addrconf_sysctl_disable, | |
778d80be | 5092 | }, |
1b34be74 | 5093 | { |
e21e8467 SH |
5094 | .procname = "accept_dad", |
5095 | .data = &ipv6_devconf.accept_dad, | |
5096 | .maxlen = sizeof(int), | |
5097 | .mode = 0644, | |
5098 | .proc_handler = proc_dointvec, | |
1b34be74 | 5099 | }, |
f7734fdf | 5100 | { |
f7734fdf OP |
5101 | .procname = "force_tllao", |
5102 | .data = &ipv6_devconf.force_tllao, | |
5103 | .maxlen = sizeof(int), | |
5104 | .mode = 0644, | |
5105 | .proc_handler = proc_dointvec | |
5106 | }, | |
5cb04436 HFS |
5107 | { |
5108 | .procname = "ndisc_notify", | |
5109 | .data = &ipv6_devconf.ndisc_notify, | |
5110 | .maxlen = sizeof(int), | |
5111 | .mode = 0644, | |
5112 | .proc_handler = proc_dointvec | |
5113 | }, | |
6fa3eb70 S |
5114 | #ifdef CONFIG_MTK_DHCPV6C_WIFI |
5115 | { | |
5116 | .procname = "ra_info_flag", | |
5117 | .data = &ipv6_devconf.ra_info_flag, | |
5118 | .maxlen = sizeof(int), | |
5119 | .mode = 0644, | |
5120 | .proc_handler = proc_dointvec | |
5121 | }, | |
5122 | #endif | |
1da177e4 | 5123 | { |
f8572d8f | 5124 | /* sentinel */ |
1da177e4 LT |
5125 | } |
5126 | }, | |
1da177e4 LT |
5127 | }; |
5128 | ||
bff16c2f | 5129 | static int __addrconf_sysctl_register(struct net *net, char *dev_name, |
f8572d8f | 5130 | struct inet6_dev *idev, struct ipv6_devconf *p) |
1da177e4 LT |
5131 | { |
5132 | int i; | |
1da177e4 | 5133 | struct addrconf_sysctl_table *t; |
6105e293 | 5134 | char path[sizeof("net/ipv6/conf/") + IFNAMSIZ]; |
1dab6222 | 5135 | |
af879cc7 | 5136 | t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL); |
1da177e4 | 5137 | if (t == NULL) |
f68635e6 PE |
5138 | goto out; |
5139 | ||
bcdd553f | 5140 | for (i = 0; t->addrconf_vars[i].data; i++) { |
e21e8467 | 5141 | t->addrconf_vars[i].data += (char *)p - (char *)&ipv6_devconf; |
1da177e4 | 5142 | t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */ |
bff16c2f | 5143 | t->addrconf_vars[i].extra2 = net; |
1da177e4 | 5144 | } |
1da177e4 | 5145 | |
6105e293 | 5146 | snprintf(path, sizeof(path), "net/ipv6/conf/%s", dev_name); |
1da177e4 | 5147 | |
6105e293 | 5148 | t->sysctl_header = register_net_sysctl(net, path, t->addrconf_vars); |
1da177e4 | 5149 | if (t->sysctl_header == NULL) |
6105e293 | 5150 | goto free; |
f68635e6 PE |
5151 | |
5152 | p->sysctl = t; | |
95897312 | 5153 | return 0; |
1da177e4 | 5154 | |
f68635e6 | 5155 | free: |
1da177e4 | 5156 | kfree(t); |
f68635e6 | 5157 | out: |
95897312 | 5158 | return -ENOBUFS; |
1da177e4 LT |
5159 | } |
5160 | ||
408c4768 PE |
5161 | static void __addrconf_sysctl_unregister(struct ipv6_devconf *p) |
5162 | { | |
5163 | struct addrconf_sysctl_table *t; | |
5164 | ||
5165 | if (p->sysctl == NULL) | |
5166 | return; | |
5167 | ||
5168 | t = p->sysctl; | |
5169 | p->sysctl = NULL; | |
ff538818 | 5170 | unregister_net_sysctl_table(t->sysctl_header); |
408c4768 PE |
5171 | kfree(t); |
5172 | } | |
5173 | ||
f52295a9 PE |
5174 | static void addrconf_sysctl_register(struct inet6_dev *idev) |
5175 | { | |
54716e3b | 5176 | neigh_sysctl_register(idev->dev, idev->nd_parms, "ipv6", |
f8572d8f | 5177 | &ndisc_ifinfo_sysctl_change); |
c346dca1 | 5178 | __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name, |
f8572d8f | 5179 | idev, &idev->cnf); |
f52295a9 PE |
5180 | } |
5181 | ||
408c4768 | 5182 | static void addrconf_sysctl_unregister(struct inet6_dev *idev) |
1da177e4 | 5183 | { |
408c4768 PE |
5184 | __addrconf_sysctl_unregister(&idev->cnf); |
5185 | neigh_sysctl_unregister(idev->nd_parms); | |
1da177e4 LT |
5186 | } |
5187 | ||
5188 | ||
5189 | #endif | |
5190 | ||
2c8c1e72 | 5191 | static int __net_init addrconf_init_net(struct net *net) |
e0da5a48 | 5192 | { |
a79ca223 | 5193 | int err = -ENOMEM; |
e0da5a48 PE |
5194 | struct ipv6_devconf *all, *dflt; |
5195 | ||
a79ca223 HZ |
5196 | all = kmemdup(&ipv6_devconf, sizeof(ipv6_devconf), GFP_KERNEL); |
5197 | if (all == NULL) | |
5198 | goto err_alloc_all; | |
e0da5a48 | 5199 | |
a79ca223 HZ |
5200 | dflt = kmemdup(&ipv6_devconf_dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL); |
5201 | if (dflt == NULL) | |
5202 | goto err_alloc_dflt; | |
e0da5a48 | 5203 | |
a79ca223 HZ |
5204 | /* these will be inherited by all namespaces */ |
5205 | dflt->autoconf = ipv6_defaults.autoconf; | |
5206 | dflt->disable_ipv6 = ipv6_defaults.disable_ipv6; | |
e0da5a48 PE |
5207 | |
5208 | net->ipv6.devconf_all = all; | |
5209 | net->ipv6.devconf_dflt = dflt; | |
5210 | ||
5211 | #ifdef CONFIG_SYSCTL | |
f8572d8f | 5212 | err = __addrconf_sysctl_register(net, "all", NULL, all); |
e0da5a48 PE |
5213 | if (err < 0) |
5214 | goto err_reg_all; | |
5215 | ||
f8572d8f | 5216 | err = __addrconf_sysctl_register(net, "default", NULL, dflt); |
e0da5a48 PE |
5217 | if (err < 0) |
5218 | goto err_reg_dflt; | |
5219 | #endif | |
5220 | return 0; | |
5221 | ||
5222 | #ifdef CONFIG_SYSCTL | |
5223 | err_reg_dflt: | |
5224 | __addrconf_sysctl_unregister(all); | |
5225 | err_reg_all: | |
5226 | kfree(dflt); | |
5227 | #endif | |
5228 | err_alloc_dflt: | |
5229 | kfree(all); | |
5230 | err_alloc_all: | |
5231 | return err; | |
5232 | } | |
5233 | ||
2c8c1e72 | 5234 | static void __net_exit addrconf_exit_net(struct net *net) |
e0da5a48 PE |
5235 | { |
5236 | #ifdef CONFIG_SYSCTL | |
5237 | __addrconf_sysctl_unregister(net->ipv6.devconf_dflt); | |
5238 | __addrconf_sysctl_unregister(net->ipv6.devconf_all); | |
5239 | #endif | |
09ad9bc7 | 5240 | if (!net_eq(net, &init_net)) { |
e0da5a48 PE |
5241 | kfree(net->ipv6.devconf_dflt); |
5242 | kfree(net->ipv6.devconf_all); | |
5243 | } | |
5244 | } | |
5245 | ||
5246 | static struct pernet_operations addrconf_ops = { | |
5247 | .init = addrconf_init_net, | |
5248 | .exit = addrconf_exit_net, | |
5249 | }; | |
5250 | ||
b382b191 TG |
5251 | static struct rtnl_af_ops inet6_ops = { |
5252 | .family = AF_INET6, | |
5253 | .fill_link_af = inet6_fill_link_af, | |
5254 | .get_link_af_size = inet6_get_link_af_size, | |
f53adae4 | 5255 | .set_link_af = inet6_set_link_af, |
b382b191 TG |
5256 | }; |
5257 | ||
1da177e4 LT |
5258 | /* |
5259 | * Init / cleanup code | |
5260 | */ | |
5261 | ||
5262 | int __init addrconf_init(void) | |
5263 | { | |
c2e21293 | 5264 | int i, err; |
2a8cc6c8 | 5265 | |
e21e8467 SH |
5266 | err = ipv6_addr_label_init(); |
5267 | if (err < 0) { | |
f3213831 JP |
5268 | pr_crit("%s: cannot initialize default policy table: %d\n", |
5269 | __func__, err); | |
2cc6d2bf | 5270 | goto out; |
2a8cc6c8 | 5271 | } |
1da177e4 | 5272 | |
2cc6d2bf NH |
5273 | err = register_pernet_subsys(&addrconf_ops); |
5274 | if (err < 0) | |
5275 | goto out_addrlabel; | |
e0da5a48 | 5276 | |
835b474b HFS |
5277 | addrconf_wq = create_workqueue("ipv6_addrconf"); |
5278 | if (!addrconf_wq) { | |
5279 | err = -ENOMEM; | |
5280 | goto out_nowq; | |
5281 | } | |
5282 | ||
1da177e4 LT |
5283 | /* The addrconf netdev notifier requires that loopback_dev |
5284 | * has it's ipv6 private information allocated and setup | |
5285 | * before it can bring up and give link-local addresses | |
5286 | * to other devices which are up. | |
5287 | * | |
5288 | * Unfortunately, loopback_dev is not necessarily the first | |
5289 | * entry in the global dev_base list of net devices. In fact, | |
5290 | * it is likely to be the very last entry on that list. | |
5291 | * So this causes the notifier registry below to try and | |
5292 | * give link-local addresses to all devices besides loopback_dev | |
5293 | * first, then loopback_dev, which cases all the non-loopback_dev | |
5294 | * devices to fail to get a link-local address. | |
5295 | * | |
5296 | * So, as a temporary fix, allocate the ipv6 structure for | |
5297 | * loopback_dev first by hand. | |
5298 | * Longer term, all of the dependencies ipv6 has upon the loopback | |
5299 | * device and it being up should be removed. | |
5300 | */ | |
5301 | rtnl_lock(); | |
2774c7ab | 5302 | if (!ipv6_add_dev(init_net.loopback_dev)) |
1da177e4 LT |
5303 | err = -ENOMEM; |
5304 | rtnl_unlock(); | |
5305 | if (err) | |
e0da5a48 | 5306 | goto errlo; |
1da177e4 | 5307 | |
c2e21293 | 5308 | for (i = 0; i < IN6_ADDR_HSIZE; i++) |
5309 | INIT_HLIST_HEAD(&inet6_addr_lst[i]); | |
5310 | ||
1da177e4 LT |
5311 | register_netdevice_notifier(&ipv6_dev_notf); |
5312 | ||
835b474b | 5313 | addrconf_verify(); |
c127ea2c | 5314 | |
b382b191 TG |
5315 | err = rtnl_af_register(&inet6_ops); |
5316 | if (err < 0) | |
5317 | goto errout_af; | |
5318 | ||
c7ac8679 GR |
5319 | err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo, |
5320 | NULL); | |
c127ea2c TG |
5321 | if (err < 0) |
5322 | goto errout; | |
5323 | ||
5324 | /* Only the first call to __rtnl_register can fail */ | |
c7ac8679 GR |
5325 | __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL, NULL); |
5326 | __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL, NULL); | |
5327 | __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, | |
5328 | inet6_dump_ifaddr, NULL); | |
5329 | __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, | |
5330 | inet6_dump_ifmcaddr, NULL); | |
5331 | __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, | |
5332 | inet6_dump_ifacaddr, NULL); | |
76f8f6cb | 5333 | __rtnl_register(PF_INET6, RTM_GETNETCONF, inet6_netconf_get_devconf, |
7a674200 | 5334 | inet6_netconf_dump_devconf, NULL); |
c127ea2c | 5335 | |
2a8cc6c8 YH |
5336 | ipv6_addr_label_rtnl_register(); |
5337 | ||
1da177e4 | 5338 | return 0; |
c127ea2c | 5339 | errout: |
b382b191 TG |
5340 | rtnl_af_unregister(&inet6_ops); |
5341 | errout_af: | |
c127ea2c | 5342 | unregister_netdevice_notifier(&ipv6_dev_notf); |
e0da5a48 | 5343 | errlo: |
835b474b HFS |
5344 | destroy_workqueue(addrconf_wq); |
5345 | out_nowq: | |
e0da5a48 | 5346 | unregister_pernet_subsys(&addrconf_ops); |
2cc6d2bf NH |
5347 | out_addrlabel: |
5348 | ipv6_addr_label_cleanup(); | |
5349 | out: | |
c127ea2c | 5350 | return err; |
1da177e4 LT |
5351 | } |
5352 | ||
09f7709f | 5353 | void addrconf_cleanup(void) |
1da177e4 | 5354 | { |
176c39af | 5355 | struct net_device *dev; |
1da177e4 LT |
5356 | int i; |
5357 | ||
5358 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
e0da5a48 | 5359 | unregister_pernet_subsys(&addrconf_ops); |
2cc6d2bf | 5360 | ipv6_addr_label_cleanup(); |
1da177e4 LT |
5361 | |
5362 | rtnl_lock(); | |
5363 | ||
b382b191 TG |
5364 | __rtnl_af_unregister(&inet6_ops); |
5365 | ||
176c39af DL |
5366 | /* clean dev list */ |
5367 | for_each_netdev(&init_net, dev) { | |
5368 | if (__in6_dev_get(dev) == NULL) | |
5369 | continue; | |
5370 | addrconf_ifdown(dev, 1); | |
5371 | } | |
5372 | addrconf_ifdown(init_net.loopback_dev, 2); | |
5373 | ||
1da177e4 LT |
5374 | /* |
5375 | * Check hash table. | |
5376 | */ | |
5c578aed | 5377 | spin_lock_bh(&addrconf_hash_lock); |
c2e21293 | 5378 | for (i = 0; i < IN6_ADDR_HSIZE; i++) |
5379 | WARN_ON(!hlist_empty(&inet6_addr_lst[i])); | |
5c578aed | 5380 | spin_unlock_bh(&addrconf_hash_lock); |
835b474b | 5381 | cancel_delayed_work(&addr_chk_work); |
1da177e4 | 5382 | rtnl_unlock(); |
835b474b HFS |
5383 | |
5384 | destroy_workqueue(addrconf_wq); | |
1da177e4 | 5385 | } |