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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * IPv6 Address [auto]configuration | |
3 | * Linux INET6 implementation | |
4 | * | |
5 | * Authors: | |
1ab1457c | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
1da177e4 LT |
7 | * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> |
8 | * | |
1da177e4 LT |
9 | * This program is free software; you can redistribute it and/or |
10 | * modify it under the terms of the GNU General Public License | |
11 | * as published by the Free Software Foundation; either version | |
12 | * 2 of the License, or (at your option) any later version. | |
13 | */ | |
14 | ||
15 | /* | |
16 | * Changes: | |
17 | * | |
18 | * Janos Farkas : delete timer on ifdown | |
19 | * <chexum@bankinf.banki.hu> | |
20 | * Andi Kleen : kill double kfree on module | |
21 | * unload. | |
22 | * Maciej W. Rozycki : FDDI support | |
23 | * sekiya@USAGI : Don't send too many RS | |
24 | * packets. | |
25 | * yoshfuji@USAGI : Fixed interval between DAD | |
26 | * packets. | |
27 | * YOSHIFUJI Hideaki @USAGI : improved accuracy of | |
28 | * address validation timer. | |
29 | * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041) | |
30 | * support. | |
31 | * Yuji SEKIYA @USAGI : Don't assign a same IPv6 | |
32 | * address on a same interface. | |
33 | * YOSHIFUJI Hideaki @USAGI : ARCnet support | |
34 | * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to | |
35 | * seq_file. | |
b1cacb68 YH |
36 | * YOSHIFUJI Hideaki @USAGI : improved source address |
37 | * selection; consider scope, | |
38 | * status etc. | |
1da177e4 LT |
39 | */ |
40 | ||
f3213831 JP |
41 | #define pr_fmt(fmt) "IPv6: " fmt |
42 | ||
1da177e4 LT |
43 | #include <linux/errno.h> |
44 | #include <linux/types.h> | |
a0bffffc | 45 | #include <linux/kernel.h> |
1da177e4 LT |
46 | #include <linux/socket.h> |
47 | #include <linux/sockios.h> | |
1da177e4 LT |
48 | #include <linux/net.h> |
49 | #include <linux/in6.h> | |
50 | #include <linux/netdevice.h> | |
1823730f | 51 | #include <linux/if_addr.h> |
1da177e4 LT |
52 | #include <linux/if_arp.h> |
53 | #include <linux/if_arcnet.h> | |
54 | #include <linux/if_infiniband.h> | |
55 | #include <linux/route.h> | |
56 | #include <linux/inetdevice.h> | |
57 | #include <linux/init.h> | |
5a0e3ad6 | 58 | #include <linux/slab.h> |
1da177e4 LT |
59 | #ifdef CONFIG_SYSCTL |
60 | #include <linux/sysctl.h> | |
61 | #endif | |
4fc268d2 | 62 | #include <linux/capability.h> |
1da177e4 LT |
63 | #include <linux/delay.h> |
64 | #include <linux/notifier.h> | |
543537bd | 65 | #include <linux/string.h> |
ddbe5032 | 66 | #include <linux/hash.h> |
1da177e4 | 67 | |
457c4cbc | 68 | #include <net/net_namespace.h> |
1da177e4 LT |
69 | #include <net/sock.h> |
70 | #include <net/snmp.h> | |
71 | ||
06a4c1c5 | 72 | #include <net/af_ieee802154.h> |
cb6bf355 | 73 | #include <net/firewire.h> |
1da177e4 LT |
74 | #include <net/ipv6.h> |
75 | #include <net/protocol.h> | |
76 | #include <net/ndisc.h> | |
77 | #include <net/ip6_route.h> | |
78 | #include <net/addrconf.h> | |
79 | #include <net/tcp.h> | |
80 | #include <net/ip.h> | |
5d620266 | 81 | #include <net/netlink.h> |
f24e3d65 | 82 | #include <net/pkt_sched.h> |
1da177e4 LT |
83 | #include <linux/if_tunnel.h> |
84 | #include <linux/rtnetlink.h> | |
f3a1bfb1 | 85 | #include <linux/netconf.h> |
1da177e4 | 86 | #include <linux/random.h> |
e21e8467 | 87 | #include <linux/uaccess.h> |
7f7d9a6b | 88 | #include <asm/unaligned.h> |
1da177e4 LT |
89 | |
90 | #include <linux/proc_fs.h> | |
91 | #include <linux/seq_file.h> | |
bc3b2d7f | 92 | #include <linux/export.h> |
1da177e4 LT |
93 | |
94 | /* Set to 3 to get tracing... */ | |
95 | #define ACONF_DEBUG 2 | |
96 | ||
97 | #if ACONF_DEBUG >= 3 | |
ba3542e1 | 98 | #define ADBG(fmt, ...) printk(fmt, ##__VA_ARGS__) |
1da177e4 | 99 | #else |
ba3542e1 | 100 | #define ADBG(fmt, ...) do { if (0) printk(fmt, ##__VA_ARGS__); } while (0) |
1da177e4 LT |
101 | #endif |
102 | ||
103 | #define INFINITY_LIFE_TIME 0xFFFFFFFF | |
18a31e1e TG |
104 | |
105 | static inline u32 cstamp_delta(unsigned long cstamp) | |
106 | { | |
107 | return (cstamp - INITIAL_JIFFIES) * 100UL / HZ; | |
108 | } | |
1da177e4 LT |
109 | |
110 | #ifdef CONFIG_SYSCTL | |
f52295a9 | 111 | static void addrconf_sysctl_register(struct inet6_dev *idev); |
408c4768 PE |
112 | static void addrconf_sysctl_unregister(struct inet6_dev *idev); |
113 | #else | |
114 | static inline void addrconf_sysctl_register(struct inet6_dev *idev) | |
115 | { | |
116 | } | |
117 | ||
118 | static inline void addrconf_sysctl_unregister(struct inet6_dev *idev) | |
119 | { | |
120 | } | |
1da177e4 LT |
121 | #endif |
122 | ||
eb7e0575 SD |
123 | static void __ipv6_regen_rndid(struct inet6_dev *idev); |
124 | static void __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr); | |
1da177e4 | 125 | static void ipv6_regen_rndid(unsigned long data); |
1da177e4 | 126 | |
1b34be74 | 127 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev); |
1da177e4 LT |
128 | static int ipv6_count_addresses(struct inet6_dev *idev); |
129 | ||
130 | /* | |
131 | * Configured unicast address hash table | |
132 | */ | |
c2e21293 | 133 | static struct hlist_head inet6_addr_lst[IN6_ADDR_HSIZE]; |
5c578aed | 134 | static DEFINE_SPINLOCK(addrconf_hash_lock); |
1da177e4 | 135 | |
1da177e4 LT |
136 | static void addrconf_verify(unsigned long); |
137 | ||
8d06afab | 138 | static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0); |
1da177e4 LT |
139 | static DEFINE_SPINLOCK(addrconf_verify_lock); |
140 | ||
141 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp); | |
142 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp); | |
143 | ||
93d9b7d7 JP |
144 | static void addrconf_type_change(struct net_device *dev, |
145 | unsigned long event); | |
1da177e4 LT |
146 | static int addrconf_ifdown(struct net_device *dev, int how); |
147 | ||
21caa662 RK |
148 | static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx, |
149 | int plen, | |
150 | const struct net_device *dev, | |
151 | u32 flags, u32 noflags); | |
152 | ||
cf22f9a2 | 153 | static void addrconf_dad_start(struct inet6_ifaddr *ifp); |
1da177e4 LT |
154 | static void addrconf_dad_timer(unsigned long data); |
155 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp); | |
c5e33bdd | 156 | static void addrconf_dad_run(struct inet6_dev *idev); |
1da177e4 LT |
157 | static void addrconf_rs_timer(unsigned long data); |
158 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
159 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
160 | ||
1ab1457c | 161 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 | 162 | struct prefix_info *pinfo); |
3e81c6da DM |
163 | static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
164 | struct net_device *dev); | |
1da177e4 | 165 | |
888c848e | 166 | static struct ipv6_devconf ipv6_devconf __read_mostly = { |
1da177e4 LT |
167 | .forwarding = 0, |
168 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
169 | .mtu6 = IPV6_MIN_MTU, | |
170 | .accept_ra = 1, | |
171 | .accept_redirects = 1, | |
172 | .autoconf = 1, | |
173 | .force_mld_version = 0, | |
fc4eba58 HFS |
174 | .mldv1_unsolicited_report_interval = 10 * HZ, |
175 | .mldv2_unsolicited_report_interval = HZ, | |
1da177e4 LT |
176 | .dad_transmits = 1, |
177 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
178 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
179 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
1da177e4 LT |
180 | .use_tempaddr = 0, |
181 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
182 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
183 | .regen_max_retry = REGEN_MAX_RETRY, | |
184 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
1da177e4 | 185 | .max_addresses = IPV6_MAX_ADDRESSES, |
65f5c7c1 | 186 | .accept_ra_defrtr = 1, |
c4fd30eb | 187 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
188 | #ifdef CONFIG_IPV6_ROUTER_PREF |
189 | .accept_ra_rtr_pref = 1, | |
52e16356 | 190 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
191 | #ifdef CONFIG_IPV6_ROUTE_INFO |
192 | .accept_ra_rt_info_max_plen = 0, | |
193 | #endif | |
930d6ff2 | 194 | #endif |
fbea49e1 | 195 | .proxy_ndp = 0, |
0bcbc926 | 196 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
778d80be | 197 | .disable_ipv6 = 0, |
1b34be74 | 198 | .accept_dad = 1, |
b800c3b9 | 199 | .suppress_frag_ndisc = 1, |
1da177e4 LT |
200 | }; |
201 | ||
ab32ea5d | 202 | static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = { |
1da177e4 LT |
203 | .forwarding = 0, |
204 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
205 | .mtu6 = IPV6_MIN_MTU, | |
206 | .accept_ra = 1, | |
207 | .accept_redirects = 1, | |
208 | .autoconf = 1, | |
fc4eba58 HFS |
209 | .force_mld_version = 0, |
210 | .mldv1_unsolicited_report_interval = 10 * HZ, | |
211 | .mldv2_unsolicited_report_interval = HZ, | |
1da177e4 LT |
212 | .dad_transmits = 1, |
213 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
214 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
215 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
1da177e4 LT |
216 | .use_tempaddr = 0, |
217 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
218 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
219 | .regen_max_retry = REGEN_MAX_RETRY, | |
220 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
1da177e4 | 221 | .max_addresses = IPV6_MAX_ADDRESSES, |
65f5c7c1 | 222 | .accept_ra_defrtr = 1, |
c4fd30eb | 223 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
224 | #ifdef CONFIG_IPV6_ROUTER_PREF |
225 | .accept_ra_rtr_pref = 1, | |
52e16356 | 226 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
227 | #ifdef CONFIG_IPV6_ROUTE_INFO |
228 | .accept_ra_rt_info_max_plen = 0, | |
229 | #endif | |
930d6ff2 | 230 | #endif |
fbea49e1 | 231 | .proxy_ndp = 0, |
0bcbc926 | 232 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
778d80be | 233 | .disable_ipv6 = 0, |
1b34be74 | 234 | .accept_dad = 1, |
b800c3b9 | 235 | .suppress_frag_ndisc = 1, |
1da177e4 LT |
236 | }; |
237 | ||
f24e3d65 | 238 | /* Check if a valid qdisc is available */ |
05297949 | 239 | static inline bool addrconf_qdisc_ok(const struct net_device *dev) |
f24e3d65 | 240 | { |
05297949 | 241 | return !qdisc_tx_is_noop(dev); |
f24e3d65 MC |
242 | } |
243 | ||
b7b1bfce | 244 | static void addrconf_del_rs_timer(struct inet6_dev *idev) |
1da177e4 | 245 | { |
b7b1bfce HFS |
246 | if (del_timer(&idev->rs_timer)) |
247 | __in6_dev_put(idev); | |
248 | } | |
249 | ||
250 | static void addrconf_del_dad_timer(struct inet6_ifaddr *ifp) | |
251 | { | |
252 | if (del_timer(&ifp->dad_timer)) | |
1da177e4 LT |
253 | __in6_ifa_put(ifp); |
254 | } | |
255 | ||
b7b1bfce HFS |
256 | static void addrconf_mod_rs_timer(struct inet6_dev *idev, |
257 | unsigned long when) | |
258 | { | |
259 | if (!timer_pending(&idev->rs_timer)) | |
260 | in6_dev_hold(idev); | |
261 | mod_timer(&idev->rs_timer, jiffies + when); | |
262 | } | |
1da177e4 | 263 | |
b7b1bfce HFS |
264 | static void addrconf_mod_dad_timer(struct inet6_ifaddr *ifp, |
265 | unsigned long when) | |
1da177e4 | 266 | { |
b7b1bfce | 267 | if (!timer_pending(&ifp->dad_timer)) |
1da177e4 | 268 | in6_ifa_hold(ifp); |
b7b1bfce | 269 | mod_timer(&ifp->dad_timer, jiffies + when); |
1da177e4 LT |
270 | } |
271 | ||
7f7d9a6b HX |
272 | static int snmp6_alloc_dev(struct inet6_dev *idev) |
273 | { | |
827da44c JS |
274 | int i; |
275 | ||
7d720c3e | 276 | if (snmp_mib_init((void __percpu **)idev->stats.ipv6, |
1823e4c8 ED |
277 | sizeof(struct ipstats_mib), |
278 | __alignof__(struct ipstats_mib)) < 0) | |
7f7d9a6b | 279 | goto err_ip; |
827da44c JS |
280 | |
281 | for_each_possible_cpu(i) { | |
282 | struct ipstats_mib *addrconf_stats; | |
283 | addrconf_stats = per_cpu_ptr(idev->stats.ipv6[0], i); | |
284 | u64_stats_init(&addrconf_stats->syncp); | |
285 | #if SNMP_ARRAY_SZ == 2 | |
286 | addrconf_stats = per_cpu_ptr(idev->stats.ipv6[1], i); | |
287 | u64_stats_init(&addrconf_stats->syncp); | |
288 | #endif | |
289 | } | |
290 | ||
291 | ||
be281e55 ED |
292 | idev->stats.icmpv6dev = kzalloc(sizeof(struct icmpv6_mib_device), |
293 | GFP_KERNEL); | |
294 | if (!idev->stats.icmpv6dev) | |
7f7d9a6b | 295 | goto err_icmp; |
be281e55 ED |
296 | idev->stats.icmpv6msgdev = kzalloc(sizeof(struct icmpv6msg_mib_device), |
297 | GFP_KERNEL); | |
298 | if (!idev->stats.icmpv6msgdev) | |
14878f75 | 299 | goto err_icmpmsg; |
7f7d9a6b HX |
300 | |
301 | return 0; | |
302 | ||
14878f75 | 303 | err_icmpmsg: |
be281e55 | 304 | kfree(idev->stats.icmpv6dev); |
7f7d9a6b | 305 | err_icmp: |
7d720c3e | 306 | snmp_mib_free((void __percpu **)idev->stats.ipv6); |
7f7d9a6b | 307 | err_ip: |
aaf70ec7 | 308 | return -ENOMEM; |
7f7d9a6b HX |
309 | } |
310 | ||
8e5e8f30 | 311 | static struct inet6_dev *ipv6_add_dev(struct net_device *dev) |
1da177e4 LT |
312 | { |
313 | struct inet6_dev *ndev; | |
314 | ||
315 | ASSERT_RTNL(); | |
316 | ||
317 | if (dev->mtu < IPV6_MIN_MTU) | |
318 | return NULL; | |
319 | ||
1ab1457c | 320 | ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL); |
322f74a4 | 321 | |
1ab1457c YH |
322 | if (ndev == NULL) |
323 | return NULL; | |
322f74a4 IO |
324 | |
325 | rwlock_init(&ndev->lock); | |
326 | ndev->dev = dev; | |
502a2ffd | 327 | INIT_LIST_HEAD(&ndev->addr_list); |
b7b1bfce HFS |
328 | setup_timer(&ndev->rs_timer, addrconf_rs_timer, |
329 | (unsigned long)ndev); | |
c346dca1 | 330 | memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf)); |
322f74a4 IO |
331 | ndev->cnf.mtu6 = dev->mtu; |
332 | ndev->cnf.sysctl = NULL; | |
333 | ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); | |
334 | if (ndev->nd_parms == NULL) { | |
335 | kfree(ndev); | |
336 | return NULL; | |
337 | } | |
0187bdfb BH |
338 | if (ndev->cnf.forwarding) |
339 | dev_disable_lro(dev); | |
322f74a4 IO |
340 | /* We refer to the device */ |
341 | dev_hold(dev); | |
1da177e4 | 342 | |
322f74a4 | 343 | if (snmp6_alloc_dev(ndev) < 0) { |
ba3542e1 | 344 | ADBG(KERN_WARNING |
f3213831 | 345 | "%s: cannot allocate memory for statistics; dev=%s.\n", |
ba3542e1 | 346 | __func__, dev->name); |
322f74a4 | 347 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
8603e33d RL |
348 | dev_put(dev); |
349 | kfree(ndev); | |
322f74a4 IO |
350 | return NULL; |
351 | } | |
1da177e4 | 352 | |
322f74a4 | 353 | if (snmp6_register_dev(ndev) < 0) { |
ba3542e1 | 354 | ADBG(KERN_WARNING |
f3213831 | 355 | "%s: cannot create /proc/net/dev_snmp6/%s\n", |
ba3542e1 | 356 | __func__, dev->name); |
322f74a4 IO |
357 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
358 | ndev->dead = 1; | |
359 | in6_dev_finish_destroy(ndev); | |
360 | return NULL; | |
361 | } | |
362 | ||
363 | /* One reference from device. We must do this before | |
364 | * we invoke __ipv6_regen_rndid(). | |
365 | */ | |
366 | in6_dev_hold(ndev); | |
1da177e4 | 367 | |
1b34be74 YH |
368 | if (dev->flags & (IFF_NOARP | IFF_LOOPBACK)) |
369 | ndev->cnf.accept_dad = -1; | |
370 | ||
07a93626 | 371 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
b077d7ab | 372 | if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) { |
f3213831 | 373 | pr_info("%s: Disabled Multicast RS\n", dev->name); |
b077d7ab YH |
374 | ndev->cnf.rtr_solicits = 0; |
375 | } | |
376 | #endif | |
377 | ||
372e6c8f | 378 | INIT_LIST_HEAD(&ndev->tempaddr_list); |
b24b8a24 | 379 | setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev); |
322f74a4 IO |
380 | if ((dev->flags&IFF_LOOPBACK) || |
381 | dev->type == ARPHRD_TUNNEL || | |
9625ed72 | 382 | dev->type == ARPHRD_TUNNEL6 || |
0be669bb | 383 | dev->type == ARPHRD_SIT || |
0be669bb | 384 | dev->type == ARPHRD_NONE) { |
322f74a4 IO |
385 | ndev->cnf.use_tempaddr = -1; |
386 | } else { | |
387 | in6_dev_hold(ndev); | |
388 | ipv6_regen_rndid((unsigned long) ndev); | |
389 | } | |
5d9efa7e | 390 | |
914faa14 | 391 | ndev->token = in6addr_any; |
1da177e4 | 392 | |
f24e3d65 | 393 | if (netif_running(dev) && addrconf_qdisc_ok(dev)) |
53aadcc9 HX |
394 | ndev->if_flags |= IF_READY; |
395 | ||
322f74a4 IO |
396 | ipv6_mc_init_dev(ndev); |
397 | ndev->tstamp = jiffies; | |
f52295a9 | 398 | addrconf_sysctl_register(ndev); |
30c4cf57 | 399 | /* protected by rtnl_lock */ |
cf778b00 | 400 | rcu_assign_pointer(dev->ip6_ptr, ndev); |
d88ae4cc | 401 | |
2c5e8933 HFS |
402 | /* Join interface-local all-node multicast group */ |
403 | ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allnodes); | |
404 | ||
d88ae4cc | 405 | /* Join all-node multicast group */ |
f3ee4010 | 406 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes); |
d88ae4cc | 407 | |
d6ddef9e | 408 | /* Join all-router multicast group if forwarding is set */ |
8b2aaede | 409 | if (ndev->cnf.forwarding && (dev->flags & IFF_MULTICAST)) |
d6ddef9e LW |
410 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
411 | ||
1da177e4 LT |
412 | return ndev; |
413 | } | |
414 | ||
8e5e8f30 | 415 | static struct inet6_dev *ipv6_find_idev(struct net_device *dev) |
1da177e4 LT |
416 | { |
417 | struct inet6_dev *idev; | |
418 | ||
419 | ASSERT_RTNL(); | |
420 | ||
e21e8467 SH |
421 | idev = __in6_dev_get(dev); |
422 | if (!idev) { | |
423 | idev = ipv6_add_dev(dev); | |
424 | if (!idev) | |
1da177e4 LT |
425 | return NULL; |
426 | } | |
c5e33bdd | 427 | |
1da177e4 LT |
428 | if (dev->flags&IFF_UP) |
429 | ipv6_mc_up(idev); | |
430 | return idev; | |
431 | } | |
432 | ||
f3a1bfb1 ND |
433 | static int inet6_netconf_msgsize_devconf(int type) |
434 | { | |
435 | int size = NLMSG_ALIGN(sizeof(struct netconfmsg)) | |
436 | + nla_total_size(4); /* NETCONFA_IFINDEX */ | |
437 | ||
76f8f6cb ND |
438 | /* type -1 is used for ALL */ |
439 | if (type == -1 || type == NETCONFA_FORWARDING) | |
f3a1bfb1 | 440 | size += nla_total_size(4); |
b1afce95 | 441 | #ifdef CONFIG_IPV6_MROUTE |
d67b8c61 ND |
442 | if (type == -1 || type == NETCONFA_MC_FORWARDING) |
443 | size += nla_total_size(4); | |
b1afce95 | 444 | #endif |
c92d5491 | 445 | if (type == -1 || type == NETCONFA_PROXY_NEIGH) |
446 | size += nla_total_size(4); | |
f3a1bfb1 ND |
447 | |
448 | return size; | |
449 | } | |
450 | ||
451 | static int inet6_netconf_fill_devconf(struct sk_buff *skb, int ifindex, | |
452 | struct ipv6_devconf *devconf, u32 portid, | |
453 | u32 seq, int event, unsigned int flags, | |
454 | int type) | |
455 | { | |
456 | struct nlmsghdr *nlh; | |
457 | struct netconfmsg *ncm; | |
458 | ||
459 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct netconfmsg), | |
460 | flags); | |
461 | if (nlh == NULL) | |
462 | return -EMSGSIZE; | |
463 | ||
464 | ncm = nlmsg_data(nlh); | |
465 | ncm->ncm_family = AF_INET6; | |
466 | ||
467 | if (nla_put_s32(skb, NETCONFA_IFINDEX, ifindex) < 0) | |
468 | goto nla_put_failure; | |
469 | ||
76f8f6cb ND |
470 | /* type -1 is used for ALL */ |
471 | if ((type == -1 || type == NETCONFA_FORWARDING) && | |
f3a1bfb1 ND |
472 | nla_put_s32(skb, NETCONFA_FORWARDING, devconf->forwarding) < 0) |
473 | goto nla_put_failure; | |
b1afce95 | 474 | #ifdef CONFIG_IPV6_MROUTE |
d67b8c61 ND |
475 | if ((type == -1 || type == NETCONFA_MC_FORWARDING) && |
476 | nla_put_s32(skb, NETCONFA_MC_FORWARDING, | |
477 | devconf->mc_forwarding) < 0) | |
478 | goto nla_put_failure; | |
b1afce95 | 479 | #endif |
c92d5491 | 480 | if ((type == -1 || type == NETCONFA_PROXY_NEIGH) && |
481 | nla_put_s32(skb, NETCONFA_PROXY_NEIGH, devconf->proxy_ndp) < 0) | |
482 | goto nla_put_failure; | |
483 | ||
f3a1bfb1 ND |
484 | return nlmsg_end(skb, nlh); |
485 | ||
486 | nla_put_failure: | |
487 | nlmsg_cancel(skb, nlh); | |
488 | return -EMSGSIZE; | |
489 | } | |
490 | ||
d67b8c61 ND |
491 | void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex, |
492 | struct ipv6_devconf *devconf) | |
f3a1bfb1 ND |
493 | { |
494 | struct sk_buff *skb; | |
495 | int err = -ENOBUFS; | |
496 | ||
497 | skb = nlmsg_new(inet6_netconf_msgsize_devconf(type), GFP_ATOMIC); | |
498 | if (skb == NULL) | |
499 | goto errout; | |
500 | ||
501 | err = inet6_netconf_fill_devconf(skb, ifindex, devconf, 0, 0, | |
502 | RTM_NEWNETCONF, 0, type); | |
503 | if (err < 0) { | |
504 | /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */ | |
505 | WARN_ON(err == -EMSGSIZE); | |
506 | kfree_skb(skb); | |
507 | goto errout; | |
508 | } | |
509 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_NETCONF, NULL, GFP_ATOMIC); | |
510 | return; | |
511 | errout: | |
bd779028 | 512 | rtnl_set_sk_err(net, RTNLGRP_IPV6_NETCONF, err); |
f3a1bfb1 ND |
513 | } |
514 | ||
76f8f6cb ND |
515 | static const struct nla_policy devconf_ipv6_policy[NETCONFA_MAX+1] = { |
516 | [NETCONFA_IFINDEX] = { .len = sizeof(int) }, | |
517 | [NETCONFA_FORWARDING] = { .len = sizeof(int) }, | |
c92d5491 | 518 | [NETCONFA_PROXY_NEIGH] = { .len = sizeof(int) }, |
76f8f6cb ND |
519 | }; |
520 | ||
521 | static int inet6_netconf_get_devconf(struct sk_buff *in_skb, | |
661d2967 | 522 | struct nlmsghdr *nlh) |
76f8f6cb ND |
523 | { |
524 | struct net *net = sock_net(in_skb->sk); | |
525 | struct nlattr *tb[NETCONFA_MAX+1]; | |
526 | struct netconfmsg *ncm; | |
527 | struct sk_buff *skb; | |
528 | struct ipv6_devconf *devconf; | |
529 | struct inet6_dev *in6_dev; | |
530 | struct net_device *dev; | |
531 | int ifindex; | |
532 | int err; | |
533 | ||
534 | err = nlmsg_parse(nlh, sizeof(*ncm), tb, NETCONFA_MAX, | |
535 | devconf_ipv6_policy); | |
536 | if (err < 0) | |
537 | goto errout; | |
538 | ||
539 | err = EINVAL; | |
540 | if (!tb[NETCONFA_IFINDEX]) | |
541 | goto errout; | |
542 | ||
543 | ifindex = nla_get_s32(tb[NETCONFA_IFINDEX]); | |
544 | switch (ifindex) { | |
545 | case NETCONFA_IFINDEX_ALL: | |
546 | devconf = net->ipv6.devconf_all; | |
547 | break; | |
548 | case NETCONFA_IFINDEX_DEFAULT: | |
549 | devconf = net->ipv6.devconf_dflt; | |
550 | break; | |
551 | default: | |
552 | dev = __dev_get_by_index(net, ifindex); | |
553 | if (dev == NULL) | |
554 | goto errout; | |
555 | in6_dev = __in6_dev_get(dev); | |
556 | if (in6_dev == NULL) | |
557 | goto errout; | |
558 | devconf = &in6_dev->cnf; | |
559 | break; | |
560 | } | |
561 | ||
562 | err = -ENOBUFS; | |
563 | skb = nlmsg_new(inet6_netconf_msgsize_devconf(-1), GFP_ATOMIC); | |
564 | if (skb == NULL) | |
565 | goto errout; | |
566 | ||
567 | err = inet6_netconf_fill_devconf(skb, ifindex, devconf, | |
568 | NETLINK_CB(in_skb).portid, | |
569 | nlh->nlmsg_seq, RTM_NEWNETCONF, 0, | |
570 | -1); | |
571 | if (err < 0) { | |
572 | /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */ | |
573 | WARN_ON(err == -EMSGSIZE); | |
574 | kfree_skb(skb); | |
575 | goto errout; | |
576 | } | |
577 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); | |
578 | errout: | |
579 | return err; | |
580 | } | |
581 | ||
7a674200 ND |
582 | static int inet6_netconf_dump_devconf(struct sk_buff *skb, |
583 | struct netlink_callback *cb) | |
584 | { | |
585 | struct net *net = sock_net(skb->sk); | |
586 | int h, s_h; | |
587 | int idx, s_idx; | |
588 | struct net_device *dev; | |
589 | struct inet6_dev *idev; | |
590 | struct hlist_head *head; | |
591 | ||
592 | s_h = cb->args[0]; | |
593 | s_idx = idx = cb->args[1]; | |
594 | ||
595 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
596 | idx = 0; | |
597 | head = &net->dev_index_head[h]; | |
598 | rcu_read_lock(); | |
63998ac2 ND |
599 | cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^ |
600 | net->dev_base_seq; | |
7a674200 ND |
601 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
602 | if (idx < s_idx) | |
603 | goto cont; | |
604 | idev = __in6_dev_get(dev); | |
605 | if (!idev) | |
606 | goto cont; | |
607 | ||
608 | if (inet6_netconf_fill_devconf(skb, dev->ifindex, | |
609 | &idev->cnf, | |
610 | NETLINK_CB(cb->skb).portid, | |
611 | cb->nlh->nlmsg_seq, | |
612 | RTM_NEWNETCONF, | |
613 | NLM_F_MULTI, | |
614 | -1) <= 0) { | |
615 | rcu_read_unlock(); | |
616 | goto done; | |
617 | } | |
63998ac2 | 618 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
7a674200 ND |
619 | cont: |
620 | idx++; | |
621 | } | |
622 | rcu_read_unlock(); | |
623 | } | |
624 | if (h == NETDEV_HASHENTRIES) { | |
625 | if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_ALL, | |
626 | net->ipv6.devconf_all, | |
627 | NETLINK_CB(cb->skb).portid, | |
628 | cb->nlh->nlmsg_seq, | |
629 | RTM_NEWNETCONF, NLM_F_MULTI, | |
630 | -1) <= 0) | |
631 | goto done; | |
632 | else | |
633 | h++; | |
634 | } | |
635 | if (h == NETDEV_HASHENTRIES + 1) { | |
636 | if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_DEFAULT, | |
637 | net->ipv6.devconf_dflt, | |
638 | NETLINK_CB(cb->skb).portid, | |
639 | cb->nlh->nlmsg_seq, | |
640 | RTM_NEWNETCONF, NLM_F_MULTI, | |
641 | -1) <= 0) | |
642 | goto done; | |
643 | else | |
644 | h++; | |
645 | } | |
646 | done: | |
647 | cb->args[0] = h; | |
648 | cb->args[1] = idx; | |
649 | ||
650 | return skb->len; | |
651 | } | |
652 | ||
1da177e4 LT |
653 | #ifdef CONFIG_SYSCTL |
654 | static void dev_forward_change(struct inet6_dev *idev) | |
655 | { | |
656 | struct net_device *dev; | |
657 | struct inet6_ifaddr *ifa; | |
1da177e4 LT |
658 | |
659 | if (!idev) | |
660 | return; | |
661 | dev = idev->dev; | |
0187bdfb BH |
662 | if (idev->cnf.forwarding) |
663 | dev_disable_lro(dev); | |
1a940835 | 664 | if (dev->flags & IFF_MULTICAST) { |
2c5e8933 | 665 | if (idev->cnf.forwarding) { |
f3ee4010 | 666 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
2c5e8933 HFS |
667 | ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allrouters); |
668 | ipv6_dev_mc_inc(dev, &in6addr_sitelocal_allrouters); | |
669 | } else { | |
f3ee4010 | 670 | ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters); |
2c5e8933 HFS |
671 | ipv6_dev_mc_dec(dev, &in6addr_interfacelocal_allrouters); |
672 | ipv6_dev_mc_dec(dev, &in6addr_sitelocal_allrouters); | |
673 | } | |
1da177e4 | 674 | } |
502a2ffd | 675 | |
676 | list_for_each_entry(ifa, &idev->addr_list, if_list) { | |
2c12a74c MW |
677 | if (ifa->flags&IFA_F_TENTATIVE) |
678 | continue; | |
1da177e4 LT |
679 | if (idev->cnf.forwarding) |
680 | addrconf_join_anycast(ifa); | |
681 | else | |
682 | addrconf_leave_anycast(ifa); | |
683 | } | |
f3a1bfb1 ND |
684 | inet6_netconf_notify_devconf(dev_net(dev), NETCONFA_FORWARDING, |
685 | dev->ifindex, &idev->cnf); | |
1da177e4 LT |
686 | } |
687 | ||
688 | ||
e186932b | 689 | static void addrconf_forward_change(struct net *net, __s32 newf) |
1da177e4 LT |
690 | { |
691 | struct net_device *dev; | |
692 | struct inet6_dev *idev; | |
693 | ||
4acd4945 | 694 | for_each_netdev(net, dev) { |
1da177e4 LT |
695 | idev = __in6_dev_get(dev); |
696 | if (idev) { | |
e186932b PE |
697 | int changed = (!idev->cnf.forwarding) ^ (!newf); |
698 | idev->cnf.forwarding = newf; | |
1da177e4 LT |
699 | if (changed) |
700 | dev_forward_change(idev); | |
701 | } | |
1da177e4 | 702 | } |
1da177e4 | 703 | } |
c8fecf22 | 704 | |
013d97e9 | 705 | static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int newf) |
c8fecf22 | 706 | { |
bff16c2f | 707 | struct net *net; |
013d97e9 FR |
708 | int old; |
709 | ||
710 | if (!rtnl_trylock()) | |
711 | return restart_syscall(); | |
bff16c2f PE |
712 | |
713 | net = (struct net *)table->extra2; | |
013d97e9 FR |
714 | old = *p; |
715 | *p = newf; | |
b325fddb | 716 | |
013d97e9 | 717 | if (p == &net->ipv6.devconf_dflt->forwarding) { |
f3a1bfb1 ND |
718 | if ((!newf) ^ (!old)) |
719 | inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING, | |
720 | NETCONFA_IFINDEX_DEFAULT, | |
721 | net->ipv6.devconf_dflt); | |
013d97e9 FR |
722 | rtnl_unlock(); |
723 | return 0; | |
88af182e | 724 | } |
c8fecf22 | 725 | |
e186932b | 726 | if (p == &net->ipv6.devconf_all->forwarding) { |
e186932b PE |
727 | net->ipv6.devconf_dflt->forwarding = newf; |
728 | addrconf_forward_change(net, newf); | |
f3a1bfb1 ND |
729 | if ((!newf) ^ (!old)) |
730 | inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING, | |
731 | NETCONFA_IFINDEX_ALL, | |
732 | net->ipv6.devconf_all); | |
013d97e9 | 733 | } else if ((!newf) ^ (!old)) |
c8fecf22 | 734 | dev_forward_change((struct inet6_dev *)table->extra1); |
0187bdfb | 735 | rtnl_unlock(); |
c8fecf22 | 736 | |
013d97e9 | 737 | if (newf) |
7b4da532 | 738 | rt6_purge_dflt_routers(net); |
b325fddb | 739 | return 1; |
c8fecf22 | 740 | } |
1da177e4 LT |
741 | #endif |
742 | ||
5c578aed | 743 | /* Nobody refers to this ifaddr, destroy it */ |
1da177e4 LT |
744 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) |
745 | { | |
c2e21293 | 746 | WARN_ON(!hlist_unhashed(&ifp->addr_lst)); |
547b792c | 747 | |
1da177e4 | 748 | #ifdef NET_REFCNT_DEBUG |
91df42be | 749 | pr_debug("%s\n", __func__); |
1da177e4 LT |
750 | #endif |
751 | ||
752 | in6_dev_put(ifp->idev); | |
753 | ||
b7b1bfce | 754 | if (del_timer(&ifp->dad_timer)) |
e21e8467 | 755 | pr_notice("Timer is still running, when freeing ifa=%p\n", ifp); |
1da177e4 | 756 | |
e9d3e084 | 757 | if (ifp->state != INET6_IFADDR_STATE_DEAD) { |
f3213831 | 758 | pr_warn("Freeing alive inet6 address %p\n", ifp); |
1da177e4 LT |
759 | return; |
760 | } | |
94e187c0 | 761 | ip6_rt_put(ifp->rt); |
1da177e4 | 762 | |
e5785985 | 763 | kfree_rcu(ifp, rcu); |
1da177e4 LT |
764 | } |
765 | ||
e55ffac6 BH |
766 | static void |
767 | ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp) | |
768 | { | |
502a2ffd | 769 | struct list_head *p; |
8a6ce0c0 | 770 | int ifp_scope = ipv6_addr_src_scope(&ifp->addr); |
e55ffac6 BH |
771 | |
772 | /* | |
773 | * Each device address list is sorted in order of scope - | |
774 | * global before linklocal. | |
775 | */ | |
502a2ffd | 776 | list_for_each(p, &idev->addr_list) { |
777 | struct inet6_ifaddr *ifa | |
778 | = list_entry(p, struct inet6_ifaddr, if_list); | |
8a6ce0c0 | 779 | if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr)) |
e55ffac6 BH |
780 | break; |
781 | } | |
782 | ||
b54c9b98 | 783 | list_add_tail(&ifp->if_list, p); |
e55ffac6 BH |
784 | } |
785 | ||
ddbe5032 | 786 | static u32 inet6_addr_hash(const struct in6_addr *addr) |
3eb84f49 | 787 | { |
ddbe5032 | 788 | return hash_32(ipv6_addr_hash(addr), IN6_ADDR_HSIZE_SHIFT); |
3eb84f49 YH |
789 | } |
790 | ||
1da177e4 LT |
791 | /* On success it returns ifp with increased reference count */ |
792 | ||
793 | static struct inet6_ifaddr * | |
3f8f5298 JP |
794 | ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, |
795 | const struct in6_addr *peer_addr, int pfxlen, | |
8a226b2c | 796 | int scope, u32 flags, u32 valid_lft, u32 prefered_lft) |
1da177e4 LT |
797 | { |
798 | struct inet6_ifaddr *ifa = NULL; | |
799 | struct rt6_info *rt; | |
3a88a81d | 800 | unsigned int hash; |
1da177e4 | 801 | int err = 0; |
d68b8270 YH |
802 | int addr_type = ipv6_addr_type(addr); |
803 | ||
804 | if (addr_type == IPV6_ADDR_ANY || | |
805 | addr_type & IPV6_ADDR_MULTICAST || | |
806 | (!(idev->dev->flags & IFF_LOOPBACK) && | |
807 | addr_type & IPV6_ADDR_LOOPBACK)) | |
808 | return ERR_PTR(-EADDRNOTAVAIL); | |
1da177e4 | 809 | |
8814c4b5 | 810 | rcu_read_lock_bh(); |
1da177e4 LT |
811 | if (idev->dead) { |
812 | err = -ENODEV; /*XXX*/ | |
813 | goto out2; | |
814 | } | |
815 | ||
56d417b1 | 816 | if (idev->cnf.disable_ipv6) { |
9bdd8d40 BH |
817 | err = -EACCES; |
818 | goto out2; | |
819 | } | |
820 | ||
5c578aed | 821 | spin_lock(&addrconf_hash_lock); |
1da177e4 LT |
822 | |
823 | /* Ignore adding duplicate addresses on an interface */ | |
c346dca1 | 824 | if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) { |
ba3542e1 | 825 | ADBG("ipv6_add_addr: already assigned\n"); |
1da177e4 LT |
826 | err = -EEXIST; |
827 | goto out; | |
828 | } | |
829 | ||
322f74a4 | 830 | ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); |
1da177e4 LT |
831 | |
832 | if (ifa == NULL) { | |
ba3542e1 | 833 | ADBG("ipv6_add_addr: malloc failed\n"); |
1da177e4 LT |
834 | err = -ENOBUFS; |
835 | goto out; | |
836 | } | |
837 | ||
8f031519 | 838 | rt = addrconf_dst_alloc(idev, addr, false); |
1da177e4 LT |
839 | if (IS_ERR(rt)) { |
840 | err = PTR_ERR(rt); | |
841 | goto out; | |
842 | } | |
843 | ||
bba24896 JP |
844 | neigh_parms_data_state_setall(idev->nd_parms); |
845 | ||
4e3fd7a0 | 846 | ifa->addr = *addr; |
3f8f5298 JP |
847 | if (peer_addr) |
848 | ifa->peer_addr = *peer_addr; | |
1da177e4 LT |
849 | |
850 | spin_lock_init(&ifa->lock); | |
e9d3e084 | 851 | spin_lock_init(&ifa->state_lock); |
b7b1bfce HFS |
852 | setup_timer(&ifa->dad_timer, addrconf_dad_timer, |
853 | (unsigned long)ifa); | |
c2e21293 | 854 | INIT_HLIST_NODE(&ifa->addr_lst); |
1da177e4 LT |
855 | ifa->scope = scope; |
856 | ifa->prefix_len = pfxlen; | |
857 | ifa->flags = flags | IFA_F_TENTATIVE; | |
8a226b2c JB |
858 | ifa->valid_lft = valid_lft; |
859 | ifa->prefered_lft = prefered_lft; | |
1da177e4 | 860 | ifa->cstamp = ifa->tstamp = jiffies; |
617fe29d | 861 | ifa->tokenized = false; |
1da177e4 | 862 | |
57f5f544 KF |
863 | ifa->rt = rt; |
864 | ||
1da177e4 LT |
865 | ifa->idev = idev; |
866 | in6_dev_hold(idev); | |
867 | /* For caller */ | |
868 | in6_ifa_hold(ifa); | |
869 | ||
870 | /* Add to big hash table */ | |
ddbe5032 | 871 | hash = inet6_addr_hash(addr); |
1da177e4 | 872 | |
5c578aed | 873 | hlist_add_head_rcu(&ifa->addr_lst, &inet6_addr_lst[hash]); |
5c578aed | 874 | spin_unlock(&addrconf_hash_lock); |
1da177e4 LT |
875 | |
876 | write_lock(&idev->lock); | |
877 | /* Add to inet6_dev unicast addr list. */ | |
e55ffac6 | 878 | ipv6_link_dev_addr(idev, ifa); |
1da177e4 | 879 | |
1da177e4 | 880 | if (ifa->flags&IFA_F_TEMPORARY) { |
372e6c8f | 881 | list_add(&ifa->tmp_list, &idev->tempaddr_list); |
1da177e4 LT |
882 | in6_ifa_hold(ifa); |
883 | } | |
1da177e4 | 884 | |
1da177e4 LT |
885 | in6_ifa_hold(ifa); |
886 | write_unlock(&idev->lock); | |
887 | out2: | |
8814c4b5 | 888 | rcu_read_unlock_bh(); |
1da177e4 | 889 | |
fd92833a | 890 | if (likely(err == 0)) |
f88c91dd | 891 | inet6addr_notifier_call_chain(NETDEV_UP, ifa); |
1da177e4 LT |
892 | else { |
893 | kfree(ifa); | |
894 | ifa = ERR_PTR(err); | |
895 | } | |
896 | ||
897 | return ifa; | |
898 | out: | |
5c578aed | 899 | spin_unlock(&addrconf_hash_lock); |
1da177e4 LT |
900 | goto out2; |
901 | } | |
902 | ||
903 | /* This function wants to get referenced ifp and releases it before return */ | |
904 | ||
905 | static void ipv6_del_addr(struct inet6_ifaddr *ifp) | |
906 | { | |
502a2ffd | 907 | struct inet6_ifaddr *ifa, *ifn; |
1da177e4 | 908 | struct inet6_dev *idev = ifp->idev; |
4c5ff6a6 | 909 | int state; |
1da177e4 LT |
910 | int deleted = 0, onlink = 0; |
911 | unsigned long expires = jiffies; | |
912 | ||
4c5ff6a6 HX |
913 | spin_lock_bh(&ifp->state_lock); |
914 | state = ifp->state; | |
e9d3e084 | 915 | ifp->state = INET6_IFADDR_STATE_DEAD; |
4c5ff6a6 HX |
916 | spin_unlock_bh(&ifp->state_lock); |
917 | ||
918 | if (state == INET6_IFADDR_STATE_DEAD) | |
919 | goto out; | |
1da177e4 | 920 | |
5c578aed | 921 | spin_lock_bh(&addrconf_hash_lock); |
922 | hlist_del_init_rcu(&ifp->addr_lst); | |
5c578aed | 923 | spin_unlock_bh(&addrconf_hash_lock); |
1da177e4 LT |
924 | |
925 | write_lock_bh(&idev->lock); | |
5d9efa7e | 926 | |
1da177e4 | 927 | if (ifp->flags&IFA_F_TEMPORARY) { |
372e6c8f | 928 | list_del(&ifp->tmp_list); |
929 | if (ifp->ifpub) { | |
930 | in6_ifa_put(ifp->ifpub); | |
931 | ifp->ifpub = NULL; | |
1da177e4 | 932 | } |
372e6c8f | 933 | __in6_ifa_put(ifp); |
1da177e4 | 934 | } |
1da177e4 | 935 | |
502a2ffd | 936 | list_for_each_entry_safe(ifa, ifn, &idev->addr_list, if_list) { |
1da177e4 | 937 | if (ifa == ifp) { |
502a2ffd | 938 | list_del_init(&ifp->if_list); |
1da177e4 | 939 | __in6_ifa_put(ifp); |
502a2ffd | 940 | |
1da177e4 LT |
941 | if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0) |
942 | break; | |
943 | deleted = 1; | |
1d142804 | 944 | continue; |
1da177e4 LT |
945 | } else if (ifp->flags & IFA_F_PERMANENT) { |
946 | if (ipv6_prefix_equal(&ifa->addr, &ifp->addr, | |
947 | ifp->prefix_len)) { | |
948 | if (ifa->flags & IFA_F_PERMANENT) { | |
949 | onlink = 1; | |
950 | if (deleted) | |
951 | break; | |
952 | } else { | |
953 | unsigned long lifetime; | |
954 | ||
955 | if (!onlink) | |
956 | onlink = -1; | |
957 | ||
958 | spin_lock(&ifa->lock); | |
4bed72e4 YH |
959 | |
960 | lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ); | |
961 | /* | |
962 | * Note: Because this address is | |
963 | * not permanent, lifetime < | |
964 | * LONG_MAX / HZ here. | |
965 | */ | |
1da177e4 LT |
966 | if (time_before(expires, |
967 | ifa->tstamp + lifetime * HZ)) | |
968 | expires = ifa->tstamp + lifetime * HZ; | |
969 | spin_unlock(&ifa->lock); | |
970 | } | |
971 | } | |
972 | } | |
973 | } | |
974 | write_unlock_bh(&idev->lock); | |
975 | ||
b7b1bfce | 976 | addrconf_del_dad_timer(ifp); |
b2238566 | 977 | |
1da177e4 LT |
978 | ipv6_ifa_notify(RTM_DELADDR, ifp); |
979 | ||
f88c91dd | 980 | inet6addr_notifier_call_chain(NETDEV_DOWN, ifp); |
1da177e4 | 981 | |
1da177e4 LT |
982 | /* |
983 | * Purge or update corresponding prefix | |
984 | * | |
985 | * 1) we don't purge prefix here if address was not permanent. | |
986 | * prefix is managed by its own lifetime. | |
987 | * 2) if there're no addresses, delete prefix. | |
988 | * 3) if there're still other permanent address(es), | |
989 | * corresponding prefix is still permanent. | |
990 | * 4) otherwise, update prefix lifetime to the | |
991 | * longest valid lifetime among the corresponding | |
992 | * addresses on the device. | |
993 | * Note: subsequent RA will update lifetime. | |
994 | * | |
995 | * --yoshfuji | |
996 | */ | |
997 | if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) { | |
1da177e4 | 998 | struct rt6_info *rt; |
64c6d08e | 999 | |
46306b49 | 1000 | rt = addrconf_get_prefix_route(&ifp->addr, |
21caa662 RK |
1001 | ifp->prefix_len, |
1002 | ifp->idev->dev, | |
1003 | 0, RTF_GATEWAY | RTF_DEFAULT); | |
1004 | ||
1005 | if (rt) { | |
1da177e4 | 1006 | if (onlink == 0) { |
e0a1ad73 | 1007 | ip6_del_rt(rt); |
1da177e4 LT |
1008 | rt = NULL; |
1009 | } else if (!(rt->rt6i_flags & RTF_EXPIRES)) { | |
1716a961 | 1010 | rt6_set_expires(rt, expires); |
1da177e4 LT |
1011 | } |
1012 | } | |
94e187c0 | 1013 | ip6_rt_put(rt); |
1da177e4 LT |
1014 | } |
1015 | ||
c3968a85 DW |
1016 | /* clean up prefsrc entries */ |
1017 | rt6_remove_prefsrc(ifp); | |
4c5ff6a6 | 1018 | out: |
1da177e4 LT |
1019 | in6_ifa_put(ifp); |
1020 | } | |
1021 | ||
1da177e4 LT |
1022 | static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) |
1023 | { | |
1024 | struct inet6_dev *idev = ifp->idev; | |
1025 | struct in6_addr addr, *tmpaddr; | |
76f793e3 | 1026 | unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_tstamp, age; |
eac55bf9 | 1027 | unsigned long regen_advance; |
1da177e4 LT |
1028 | int tmp_plen; |
1029 | int ret = 0; | |
95c385b4 | 1030 | u32 addr_flags; |
76f793e3 | 1031 | unsigned long now = jiffies; |
1da177e4 | 1032 | |
53bd6749 | 1033 | write_lock_bh(&idev->lock); |
1da177e4 LT |
1034 | if (ift) { |
1035 | spin_lock_bh(&ift->lock); | |
1036 | memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); | |
1037 | spin_unlock_bh(&ift->lock); | |
1038 | tmpaddr = &addr; | |
1039 | } else { | |
1040 | tmpaddr = NULL; | |
1041 | } | |
1042 | retry: | |
1043 | in6_dev_hold(idev); | |
1044 | if (idev->cnf.use_tempaddr <= 0) { | |
53bd6749 | 1045 | write_unlock_bh(&idev->lock); |
f3213831 | 1046 | pr_info("%s: use_tempaddr is disabled\n", __func__); |
1da177e4 LT |
1047 | in6_dev_put(idev); |
1048 | ret = -1; | |
1049 | goto out; | |
1050 | } | |
1051 | spin_lock_bh(&ifp->lock); | |
1052 | if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { | |
1053 | idev->cnf.use_tempaddr = -1; /*XXX*/ | |
1054 | spin_unlock_bh(&ifp->lock); | |
53bd6749 | 1055 | write_unlock_bh(&idev->lock); |
f3213831 JP |
1056 | pr_warn("%s: regeneration time exceeded - disabled temporary address support\n", |
1057 | __func__); | |
1da177e4 LT |
1058 | in6_dev_put(idev); |
1059 | ret = -1; | |
1060 | goto out; | |
1061 | } | |
1062 | in6_ifa_hold(ifp); | |
1063 | memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); | |
eb7e0575 | 1064 | __ipv6_try_regen_rndid(idev, tmpaddr); |
1da177e4 | 1065 | memcpy(&addr.s6_addr[8], idev->rndid, 8); |
76f793e3 | 1066 | age = (now - ifp->tstamp) / HZ; |
1da177e4 LT |
1067 | tmp_valid_lft = min_t(__u32, |
1068 | ifp->valid_lft, | |
7a876b0e | 1069 | idev->cnf.temp_valid_lft + age); |
1ab1457c YH |
1070 | tmp_prefered_lft = min_t(__u32, |
1071 | ifp->prefered_lft, | |
7a876b0e | 1072 | idev->cnf.temp_prefered_lft + age - |
784e2710 | 1073 | idev->cnf.max_desync_factor); |
1da177e4 | 1074 | tmp_plen = ifp->prefix_len; |
1da177e4 LT |
1075 | tmp_tstamp = ifp->tstamp; |
1076 | spin_unlock_bh(&ifp->lock); | |
1077 | ||
eac55bf9 | 1078 | regen_advance = idev->cnf.regen_max_retry * |
7eaa48a4 | 1079 | idev->cnf.dad_transmits * |
1f9248e5 | 1080 | NEIGH_VAR(idev->nd_parms, RETRANS_TIME) / HZ; |
53bd6749 | 1081 | write_unlock_bh(&idev->lock); |
95c385b4 | 1082 | |
eac55bf9 BB |
1083 | /* A temporary address is created only if this calculated Preferred |
1084 | * Lifetime is greater than REGEN_ADVANCE time units. In particular, | |
1085 | * an implementation must not create a temporary address with a zero | |
1086 | * Preferred Lifetime. | |
1087 | */ | |
1088 | if (tmp_prefered_lft <= regen_advance) { | |
1089 | in6_ifa_put(ifp); | |
1090 | in6_dev_put(idev); | |
1091 | ret = -1; | |
1092 | goto out; | |
1093 | } | |
1094 | ||
95c385b4 NH |
1095 | addr_flags = IFA_F_TEMPORARY; |
1096 | /* set in addrconf_prefix_rcv() */ | |
1097 | if (ifp->flags & IFA_F_OPTIMISTIC) | |
1098 | addr_flags |= IFA_F_OPTIMISTIC; | |
1099 | ||
4b08a8f1 HFS |
1100 | ift = ipv6_add_addr(idev, &addr, NULL, tmp_plen, |
1101 | ipv6_addr_scope(&addr), addr_flags, | |
1102 | tmp_valid_lft, tmp_prefered_lft); | |
1103 | if (IS_ERR(ift)) { | |
1da177e4 LT |
1104 | in6_ifa_put(ifp); |
1105 | in6_dev_put(idev); | |
f3213831 | 1106 | pr_info("%s: retry temporary address regeneration\n", __func__); |
1da177e4 | 1107 | tmpaddr = &addr; |
53bd6749 | 1108 | write_lock_bh(&idev->lock); |
1da177e4 LT |
1109 | goto retry; |
1110 | } | |
1111 | ||
1112 | spin_lock_bh(&ift->lock); | |
1113 | ift->ifpub = ifp; | |
76f793e3 | 1114 | ift->cstamp = now; |
1da177e4 LT |
1115 | ift->tstamp = tmp_tstamp; |
1116 | spin_unlock_bh(&ift->lock); | |
1117 | ||
cf22f9a2 | 1118 | addrconf_dad_start(ift); |
1da177e4 LT |
1119 | in6_ifa_put(ift); |
1120 | in6_dev_put(idev); | |
1121 | out: | |
1122 | return ret; | |
1123 | } | |
1da177e4 LT |
1124 | |
1125 | /* | |
072047e4 | 1126 | * Choose an appropriate source address (RFC3484) |
1da177e4 | 1127 | */ |
a9b05723 YH |
1128 | enum { |
1129 | IPV6_SADDR_RULE_INIT = 0, | |
1130 | IPV6_SADDR_RULE_LOCAL, | |
1131 | IPV6_SADDR_RULE_SCOPE, | |
1132 | IPV6_SADDR_RULE_PREFERRED, | |
1133 | #ifdef CONFIG_IPV6_MIP6 | |
1134 | IPV6_SADDR_RULE_HOA, | |
1135 | #endif | |
1136 | IPV6_SADDR_RULE_OIF, | |
1137 | IPV6_SADDR_RULE_LABEL, | |
a9b05723 | 1138 | IPV6_SADDR_RULE_PRIVACY, |
a9b05723 YH |
1139 | IPV6_SADDR_RULE_ORCHID, |
1140 | IPV6_SADDR_RULE_PREFIX, | |
1141 | IPV6_SADDR_RULE_MAX | |
1142 | }; | |
1143 | ||
072047e4 | 1144 | struct ipv6_saddr_score { |
a9b05723 YH |
1145 | int rule; |
1146 | int addr_type; | |
1147 | struct inet6_ifaddr *ifa; | |
1148 | DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX); | |
1149 | int scopedist; | |
1150 | int matchlen; | |
072047e4 YH |
1151 | }; |
1152 | ||
a9b05723 | 1153 | struct ipv6_saddr_dst { |
9acd9f3a | 1154 | const struct in6_addr *addr; |
a9b05723 YH |
1155 | int ifindex; |
1156 | int scope; | |
1157 | int label; | |
7cbca67c | 1158 | unsigned int prefs; |
a9b05723 | 1159 | }; |
072047e4 | 1160 | |
b6f99a21 | 1161 | static inline int ipv6_saddr_preferred(int type) |
1da177e4 | 1162 | { |
45bb0060 | 1163 | if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|IPV6_ADDR_LOOPBACK)) |
072047e4 YH |
1164 | return 1; |
1165 | return 0; | |
1da177e4 LT |
1166 | } |
1167 | ||
3de23255 BT |
1168 | static int ipv6_get_saddr_eval(struct net *net, |
1169 | struct ipv6_saddr_score *score, | |
a9b05723 YH |
1170 | struct ipv6_saddr_dst *dst, |
1171 | int i) | |
1172 | { | |
1173 | int ret; | |
1174 | ||
1175 | if (i <= score->rule) { | |
1176 | switch (i) { | |
1177 | case IPV6_SADDR_RULE_SCOPE: | |
1178 | ret = score->scopedist; | |
1179 | break; | |
1180 | case IPV6_SADDR_RULE_PREFIX: | |
1181 | ret = score->matchlen; | |
1182 | break; | |
1183 | default: | |
1184 | ret = !!test_bit(i, score->scorebits); | |
1185 | } | |
1186 | goto out; | |
1187 | } | |
1188 | ||
1189 | switch (i) { | |
1190 | case IPV6_SADDR_RULE_INIT: | |
1191 | /* Rule 0: remember if hiscore is not ready yet */ | |
1192 | ret = !!score->ifa; | |
1193 | break; | |
1194 | case IPV6_SADDR_RULE_LOCAL: | |
1195 | /* Rule 1: Prefer same address */ | |
1196 | ret = ipv6_addr_equal(&score->ifa->addr, dst->addr); | |
1197 | break; | |
1198 | case IPV6_SADDR_RULE_SCOPE: | |
1199 | /* Rule 2: Prefer appropriate scope | |
1200 | * | |
1201 | * ret | |
1202 | * ^ | |
1203 | * -1 | d 15 | |
1204 | * ---+--+-+---> scope | |
1205 | * | | |
1206 | * | d is scope of the destination. | |
1207 | * B-d | \ | |
1208 | * | \ <- smaller scope is better if | |
1209 | * B-15 | \ if scope is enough for destinaion. | |
1210 | * | ret = B - scope (-1 <= scope >= d <= 15). | |
1211 | * d-C-1 | / | |
1212 | * |/ <- greater is better | |
1213 | * -C / if scope is not enough for destination. | |
1214 | * /| ret = scope - C (-1 <= d < scope <= 15). | |
1215 | * | |
1216 | * d - C - 1 < B -15 (for all -1 <= d <= 15). | |
1217 | * C > d + 14 - B >= 15 + 14 - B = 29 - B. | |
1218 | * Assume B = 0 and we get C > 29. | |
1219 | */ | |
1220 | ret = __ipv6_addr_src_scope(score->addr_type); | |
1221 | if (ret >= dst->scope) | |
1222 | ret = -ret; | |
1223 | else | |
1224 | ret -= 128; /* 30 is enough */ | |
1225 | score->scopedist = ret; | |
1226 | break; | |
1227 | case IPV6_SADDR_RULE_PREFERRED: | |
1228 | /* Rule 3: Avoid deprecated and optimistic addresses */ | |
1229 | ret = ipv6_saddr_preferred(score->addr_type) || | |
1230 | !(score->ifa->flags & (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC)); | |
1231 | break; | |
1232 | #ifdef CONFIG_IPV6_MIP6 | |
1233 | case IPV6_SADDR_RULE_HOA: | |
7cbca67c | 1234 | { |
a9b05723 | 1235 | /* Rule 4: Prefer home address */ |
7cbca67c YH |
1236 | int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA); |
1237 | ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome; | |
a9b05723 | 1238 | break; |
7cbca67c | 1239 | } |
a9b05723 YH |
1240 | #endif |
1241 | case IPV6_SADDR_RULE_OIF: | |
1242 | /* Rule 5: Prefer outgoing interface */ | |
1243 | ret = (!dst->ifindex || | |
1244 | dst->ifindex == score->ifa->idev->dev->ifindex); | |
1245 | break; | |
1246 | case IPV6_SADDR_RULE_LABEL: | |
1247 | /* Rule 6: Prefer matching label */ | |
3de23255 BT |
1248 | ret = ipv6_addr_label(net, |
1249 | &score->ifa->addr, score->addr_type, | |
a9b05723 YH |
1250 | score->ifa->idev->dev->ifindex) == dst->label; |
1251 | break; | |
a9b05723 | 1252 | case IPV6_SADDR_RULE_PRIVACY: |
7cbca67c | 1253 | { |
a9b05723 | 1254 | /* Rule 7: Prefer public address |
25985edc | 1255 | * Note: prefer temporary address if use_tempaddr >= 2 |
a9b05723 | 1256 | */ |
7cbca67c YH |
1257 | int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ? |
1258 | !!(dst->prefs & IPV6_PREFER_SRC_TMP) : | |
1259 | score->ifa->idev->cnf.use_tempaddr >= 2; | |
1260 | ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp; | |
a9b05723 | 1261 | break; |
7cbca67c | 1262 | } |
a9b05723 YH |
1263 | case IPV6_SADDR_RULE_ORCHID: |
1264 | /* Rule 8-: Prefer ORCHID vs ORCHID or | |
1265 | * non-ORCHID vs non-ORCHID | |
1266 | */ | |
1267 | ret = !(ipv6_addr_orchid(&score->ifa->addr) ^ | |
1268 | ipv6_addr_orchid(dst->addr)); | |
1269 | break; | |
1270 | case IPV6_SADDR_RULE_PREFIX: | |
1271 | /* Rule 8: Use longest matching prefix */ | |
91b4b04f YH |
1272 | ret = ipv6_addr_diff(&score->ifa->addr, dst->addr); |
1273 | if (ret > score->ifa->prefix_len) | |
1274 | ret = score->ifa->prefix_len; | |
1275 | score->matchlen = ret; | |
a9b05723 YH |
1276 | break; |
1277 | default: | |
1278 | ret = 0; | |
1279 | } | |
1280 | ||
1281 | if (ret) | |
1282 | __set_bit(i, score->scorebits); | |
1283 | score->rule = i; | |
1284 | out: | |
1285 | return ret; | |
1286 | } | |
1287 | ||
b3f644fc | 1288 | int ipv6_dev_get_saddr(struct net *net, const struct net_device *dst_dev, |
9acd9f3a | 1289 | const struct in6_addr *daddr, unsigned int prefs, |
7cbca67c | 1290 | struct in6_addr *saddr) |
1da177e4 | 1291 | { |
a9b05723 YH |
1292 | struct ipv6_saddr_score scores[2], |
1293 | *score = &scores[0], *hiscore = &scores[1]; | |
a9b05723 | 1294 | struct ipv6_saddr_dst dst; |
072047e4 | 1295 | struct net_device *dev; |
a9b05723 | 1296 | int dst_type; |
1da177e4 | 1297 | |
a9b05723 YH |
1298 | dst_type = __ipv6_addr_type(daddr); |
1299 | dst.addr = daddr; | |
1300 | dst.ifindex = dst_dev ? dst_dev->ifindex : 0; | |
1301 | dst.scope = __ipv6_addr_src_scope(dst_type); | |
3de23255 | 1302 | dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex); |
7cbca67c | 1303 | dst.prefs = prefs; |
a9b05723 YH |
1304 | |
1305 | hiscore->rule = -1; | |
1306 | hiscore->ifa = NULL; | |
1da177e4 | 1307 | |
8814c4b5 | 1308 | rcu_read_lock(); |
1da177e4 | 1309 | |
c6d14c84 | 1310 | for_each_netdev_rcu(net, dev) { |
072047e4 | 1311 | struct inet6_dev *idev; |
072047e4 | 1312 | |
a9b05723 | 1313 | /* Candidate Source Address (section 4) |
072047e4 YH |
1314 | * - multicast and link-local destination address, |
1315 | * the set of candidate source address MUST only | |
1316 | * include addresses assigned to interfaces | |
1317 | * belonging to the same link as the outgoing | |
1318 | * interface. | |
1319 | * (- For site-local destination addresses, the | |
1320 | * set of candidate source addresses MUST only | |
1321 | * include addresses assigned to interfaces | |
1322 | * belonging to the same site as the outgoing | |
1323 | * interface.) | |
1324 | */ | |
a9b05723 YH |
1325 | if (((dst_type & IPV6_ADDR_MULTICAST) || |
1326 | dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL) && | |
1327 | dst.ifindex && dev->ifindex != dst.ifindex) | |
072047e4 | 1328 | continue; |
1da177e4 | 1329 | |
1da177e4 | 1330 | idev = __in6_dev_get(dev); |
072047e4 YH |
1331 | if (!idev) |
1332 | continue; | |
1333 | ||
1334 | read_lock_bh(&idev->lock); | |
502a2ffd | 1335 | list_for_each_entry(score->ifa, &idev->addr_list, if_list) { |
a9b05723 | 1336 | int i; |
072047e4 | 1337 | |
a9b05723 | 1338 | /* |
6b3ae80a YH |
1339 | * - Tentative Address (RFC2462 section 5.4) |
1340 | * - A tentative address is not considered | |
1341 | * "assigned to an interface" in the traditional | |
95c385b4 | 1342 | * sense, unless it is also flagged as optimistic. |
6b3ae80a | 1343 | * - Candidate Source Address (section 4) |
072047e4 YH |
1344 | * - In any case, anycast addresses, multicast |
1345 | * addresses, and the unspecified address MUST | |
1346 | * NOT be included in a candidate set. | |
1347 | */ | |
a9b05723 YH |
1348 | if ((score->ifa->flags & IFA_F_TENTATIVE) && |
1349 | (!(score->ifa->flags & IFA_F_OPTIMISTIC))) | |
6b3ae80a | 1350 | continue; |
a9b05723 YH |
1351 | |
1352 | score->addr_type = __ipv6_addr_type(&score->ifa->addr); | |
1353 | ||
1354 | if (unlikely(score->addr_type == IPV6_ADDR_ANY || | |
1355 | score->addr_type & IPV6_ADDR_MULTICAST)) { | |
072047e4 | 1356 | LIMIT_NETDEBUG(KERN_DEBUG |
3b6d821c | 1357 | "ADDRCONF: unspecified / multicast address " |
072047e4 YH |
1358 | "assigned as unicast address on %s", |
1359 | dev->name); | |
1360 | continue; | |
1361 | } | |
1362 | ||
a9b05723 YH |
1363 | score->rule = -1; |
1364 | bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX); | |
1365 | ||
1366 | for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) { | |
1367 | int minihiscore, miniscore; | |
1368 | ||
3de23255 BT |
1369 | minihiscore = ipv6_get_saddr_eval(net, hiscore, &dst, i); |
1370 | miniscore = ipv6_get_saddr_eval(net, score, &dst, i); | |
a9b05723 YH |
1371 | |
1372 | if (minihiscore > miniscore) { | |
1373 | if (i == IPV6_SADDR_RULE_SCOPE && | |
1374 | score->scopedist > 0) { | |
1375 | /* | |
1376 | * special case: | |
1377 | * each remaining entry | |
1378 | * has too small (not enough) | |
1379 | * scope, because ifa entries | |
1380 | * are sorted by their scope | |
1381 | * values. | |
1382 | */ | |
1383 | goto try_nextdev; | |
1384 | } | |
1385 | break; | |
1386 | } else if (minihiscore < miniscore) { | |
a9b05723 YH |
1387 | if (hiscore->ifa) |
1388 | in6_ifa_put(hiscore->ifa); | |
1389 | ||
1390 | in6_ifa_hold(score->ifa); | |
1391 | ||
a0bffffc | 1392 | swap(hiscore, score); |
a9b05723 YH |
1393 | |
1394 | /* restore our iterator */ | |
1395 | score->ifa = hiscore->ifa; | |
1396 | ||
1397 | break; | |
1da177e4 | 1398 | } |
072047e4 | 1399 | } |
1da177e4 | 1400 | } |
a9b05723 | 1401 | try_nextdev: |
072047e4 | 1402 | read_unlock_bh(&idev->lock); |
1da177e4 | 1403 | } |
8814c4b5 | 1404 | rcu_read_unlock(); |
1da177e4 | 1405 | |
a9b05723 | 1406 | if (!hiscore->ifa) |
072047e4 | 1407 | return -EADDRNOTAVAIL; |
1ab1457c | 1408 | |
4e3fd7a0 | 1409 | *saddr = hiscore->ifa->addr; |
a9b05723 | 1410 | in6_ifa_put(hiscore->ifa); |
072047e4 | 1411 | return 0; |
1da177e4 | 1412 | } |
5e5f3f0f | 1413 | EXPORT_SYMBOL(ipv6_dev_get_saddr); |
1da177e4 | 1414 | |
8965779d | 1415 | int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr, |
479840ff | 1416 | u32 banned_flags) |
b7b1bfce HFS |
1417 | { |
1418 | struct inet6_ifaddr *ifp; | |
1419 | int err = -EADDRNOTAVAIL; | |
1420 | ||
1421 | list_for_each_entry(ifp, &idev->addr_list, if_list) { | |
1422 | if (ifp->scope == IFA_LINK && | |
1423 | !(ifp->flags & banned_flags)) { | |
1424 | *addr = ifp->addr; | |
1425 | err = 0; | |
1426 | break; | |
1427 | } | |
1428 | } | |
1429 | return err; | |
1430 | } | |
1431 | ||
95c385b4 | 1432 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, |
479840ff | 1433 | u32 banned_flags) |
1da177e4 LT |
1434 | { |
1435 | struct inet6_dev *idev; | |
1436 | int err = -EADDRNOTAVAIL; | |
1437 | ||
8814c4b5 | 1438 | rcu_read_lock(); |
e21e8467 SH |
1439 | idev = __in6_dev_get(dev); |
1440 | if (idev) { | |
1da177e4 | 1441 | read_lock_bh(&idev->lock); |
b7b1bfce | 1442 | err = __ipv6_get_lladdr(idev, addr, banned_flags); |
1da177e4 LT |
1443 | read_unlock_bh(&idev->lock); |
1444 | } | |
8814c4b5 | 1445 | rcu_read_unlock(); |
1da177e4 LT |
1446 | return err; |
1447 | } | |
1448 | ||
1449 | static int ipv6_count_addresses(struct inet6_dev *idev) | |
1450 | { | |
1451 | int cnt = 0; | |
1452 | struct inet6_ifaddr *ifp; | |
1453 | ||
1454 | read_lock_bh(&idev->lock); | |
502a2ffd | 1455 | list_for_each_entry(ifp, &idev->addr_list, if_list) |
1da177e4 LT |
1456 | cnt++; |
1457 | read_unlock_bh(&idev->lock); | |
1458 | return cnt; | |
1459 | } | |
1460 | ||
b71d1d42 | 1461 | int ipv6_chk_addr(struct net *net, const struct in6_addr *addr, |
2a7851bf | 1462 | const struct net_device *dev, int strict) |
1da177e4 | 1463 | { |
eedf042a | 1464 | struct inet6_ifaddr *ifp; |
ddbe5032 | 1465 | unsigned int hash = inet6_addr_hash(addr); |
1da177e4 | 1466 | |
5c578aed | 1467 | rcu_read_lock_bh(); |
b67bfe0d | 1468 | hlist_for_each_entry_rcu(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1469 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
bfeade08 | 1470 | continue; |
1da177e4 | 1471 | if (ipv6_addr_equal(&ifp->addr, addr) && |
eedf042a SH |
1472 | !(ifp->flags&IFA_F_TENTATIVE) && |
1473 | (dev == NULL || ifp->idev->dev == dev || | |
1474 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))) { | |
1475 | rcu_read_unlock_bh(); | |
1476 | return 1; | |
1da177e4 LT |
1477 | } |
1478 | } | |
5c578aed | 1479 | |
eedf042a SH |
1480 | rcu_read_unlock_bh(); |
1481 | return 0; | |
1da177e4 | 1482 | } |
7159039a YH |
1483 | EXPORT_SYMBOL(ipv6_chk_addr); |
1484 | ||
3e81c6da DM |
1485 | static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
1486 | struct net_device *dev) | |
1da177e4 | 1487 | { |
ddbe5032 | 1488 | unsigned int hash = inet6_addr_hash(addr); |
c2e21293 | 1489 | struct inet6_ifaddr *ifp; |
1da177e4 | 1490 | |
b67bfe0d | 1491 | hlist_for_each_entry(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1492 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
06bfe655 | 1493 | continue; |
1da177e4 LT |
1494 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
1495 | if (dev == NULL || ifp->idev->dev == dev) | |
3e81c6da | 1496 | return true; |
1da177e4 LT |
1497 | } |
1498 | } | |
3e81c6da | 1499 | return false; |
1da177e4 LT |
1500 | } |
1501 | ||
7df37ff3 CB |
1502 | /* Compares an address/prefix_len with addresses on device @dev. |
1503 | * If one is found it returns true. | |
1504 | */ | |
1505 | bool ipv6_chk_custom_prefix(const struct in6_addr *addr, | |
1506 | const unsigned int prefix_len, struct net_device *dev) | |
1507 | { | |
1508 | struct inet6_dev *idev; | |
1509 | struct inet6_ifaddr *ifa; | |
1510 | bool ret = false; | |
1511 | ||
1512 | rcu_read_lock(); | |
1513 | idev = __in6_dev_get(dev); | |
1514 | if (idev) { | |
1515 | read_lock_bh(&idev->lock); | |
1516 | list_for_each_entry(ifa, &idev->addr_list, if_list) { | |
1517 | ret = ipv6_prefix_equal(addr, &ifa->addr, prefix_len); | |
1518 | if (ret) | |
1519 | break; | |
1520 | } | |
1521 | read_unlock_bh(&idev->lock); | |
1522 | } | |
1523 | rcu_read_unlock(); | |
1524 | ||
1525 | return ret; | |
1526 | } | |
1527 | EXPORT_SYMBOL(ipv6_chk_custom_prefix); | |
1528 | ||
b71d1d42 | 1529 | int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev) |
52eeeb84 YH |
1530 | { |
1531 | struct inet6_dev *idev; | |
1532 | struct inet6_ifaddr *ifa; | |
1533 | int onlink; | |
1534 | ||
1535 | onlink = 0; | |
1536 | rcu_read_lock(); | |
1537 | idev = __in6_dev_get(dev); | |
1538 | if (idev) { | |
1539 | read_lock_bh(&idev->lock); | |
502a2ffd | 1540 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
52eeeb84 YH |
1541 | onlink = ipv6_prefix_equal(addr, &ifa->addr, |
1542 | ifa->prefix_len); | |
1543 | if (onlink) | |
1544 | break; | |
1545 | } | |
1546 | read_unlock_bh(&idev->lock); | |
1547 | } | |
1548 | rcu_read_unlock(); | |
1549 | return onlink; | |
1550 | } | |
52eeeb84 YH |
1551 | EXPORT_SYMBOL(ipv6_chk_prefix); |
1552 | ||
9acd9f3a | 1553 | struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr, |
1cab3da6 | 1554 | struct net_device *dev, int strict) |
1da177e4 | 1555 | { |
b79d1d54 | 1556 | struct inet6_ifaddr *ifp, *result = NULL; |
ddbe5032 | 1557 | unsigned int hash = inet6_addr_hash(addr); |
1da177e4 | 1558 | |
5c578aed | 1559 | rcu_read_lock_bh(); |
b67bfe0d | 1560 | hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1561 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
1cab3da6 | 1562 | continue; |
1da177e4 LT |
1563 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
1564 | if (dev == NULL || ifp->idev->dev == dev || | |
1565 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { | |
b79d1d54 | 1566 | result = ifp; |
1da177e4 LT |
1567 | in6_ifa_hold(ifp); |
1568 | break; | |
1569 | } | |
1570 | } | |
1571 | } | |
5c578aed | 1572 | rcu_read_unlock_bh(); |
1da177e4 | 1573 | |
b79d1d54 | 1574 | return result; |
1da177e4 LT |
1575 | } |
1576 | ||
1da177e4 LT |
1577 | /* Gets referenced address, destroys ifaddr */ |
1578 | ||
cc411d0b | 1579 | static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed) |
1da177e4 | 1580 | { |
1da177e4 LT |
1581 | if (ifp->flags&IFA_F_PERMANENT) { |
1582 | spin_lock_bh(&ifp->lock); | |
b7b1bfce | 1583 | addrconf_del_dad_timer(ifp); |
1da177e4 | 1584 | ifp->flags |= IFA_F_TENTATIVE; |
cc411d0b BH |
1585 | if (dad_failed) |
1586 | ifp->flags |= IFA_F_DADFAILED; | |
1da177e4 | 1587 | spin_unlock_bh(&ifp->lock); |
e2577a06 HX |
1588 | if (dad_failed) |
1589 | ipv6_ifa_notify(0, ifp); | |
1da177e4 | 1590 | in6_ifa_put(ifp); |
1da177e4 LT |
1591 | } else if (ifp->flags&IFA_F_TEMPORARY) { |
1592 | struct inet6_ifaddr *ifpub; | |
1593 | spin_lock_bh(&ifp->lock); | |
1594 | ifpub = ifp->ifpub; | |
1595 | if (ifpub) { | |
1596 | in6_ifa_hold(ifpub); | |
1597 | spin_unlock_bh(&ifp->lock); | |
1598 | ipv6_create_tempaddr(ifpub, ifp); | |
1599 | in6_ifa_put(ifpub); | |
1600 | } else { | |
1601 | spin_unlock_bh(&ifp->lock); | |
1602 | } | |
1603 | ipv6_del_addr(ifp); | |
1da177e4 LT |
1604 | } else |
1605 | ipv6_del_addr(ifp); | |
1606 | } | |
1607 | ||
f2344a13 HX |
1608 | static int addrconf_dad_end(struct inet6_ifaddr *ifp) |
1609 | { | |
1610 | int err = -ENOENT; | |
1611 | ||
1612 | spin_lock(&ifp->state_lock); | |
1613 | if (ifp->state == INET6_IFADDR_STATE_DAD) { | |
1614 | ifp->state = INET6_IFADDR_STATE_POSTDAD; | |
1615 | err = 0; | |
1616 | } | |
1617 | spin_unlock(&ifp->state_lock); | |
1618 | ||
1619 | return err; | |
1620 | } | |
1621 | ||
3c21edbd YH |
1622 | void addrconf_dad_failure(struct inet6_ifaddr *ifp) |
1623 | { | |
1b34be74 | 1624 | struct inet6_dev *idev = ifp->idev; |
9bdd8d40 | 1625 | |
853dc2e0 UB |
1626 | if (addrconf_dad_end(ifp)) { |
1627 | in6_ifa_put(ifp); | |
f2344a13 | 1628 | return; |
853dc2e0 | 1629 | } |
f2344a13 | 1630 | |
e87cc472 JP |
1631 | net_info_ratelimited("%s: IPv6 duplicate address %pI6c detected!\n", |
1632 | ifp->idev->dev->name, &ifp->addr); | |
9bdd8d40 | 1633 | |
1b34be74 YH |
1634 | if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6) { |
1635 | struct in6_addr addr; | |
1636 | ||
1637 | addr.s6_addr32[0] = htonl(0xfe800000); | |
1638 | addr.s6_addr32[1] = 0; | |
1639 | ||
1640 | if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) && | |
1641 | ipv6_addr_equal(&ifp->addr, &addr)) { | |
1642 | /* DAD failed for link-local based on MAC address */ | |
1643 | idev->cnf.disable_ipv6 = 1; | |
9bdd8d40 | 1644 | |
f3213831 | 1645 | pr_info("%s: IPv6 being disabled!\n", |
9bdd8d40 | 1646 | ifp->idev->dev->name); |
1b34be74 YH |
1647 | } |
1648 | } | |
1649 | ||
cc411d0b | 1650 | addrconf_dad_stop(ifp, 1); |
3c21edbd | 1651 | } |
1da177e4 LT |
1652 | |
1653 | /* Join to solicited addr multicast group. */ | |
1654 | ||
b71d1d42 | 1655 | void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr) |
1da177e4 LT |
1656 | { |
1657 | struct in6_addr maddr; | |
1658 | ||
1659 | if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1660 | return; | |
1661 | ||
1662 | addrconf_addr_solict_mult(addr, &maddr); | |
1663 | ipv6_dev_mc_inc(dev, &maddr); | |
1664 | } | |
1665 | ||
b71d1d42 | 1666 | void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr) |
1da177e4 LT |
1667 | { |
1668 | struct in6_addr maddr; | |
1669 | ||
1670 | if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1671 | return; | |
1672 | ||
1673 | addrconf_addr_solict_mult(addr, &maddr); | |
1674 | __ipv6_dev_mc_dec(idev, &maddr); | |
1675 | } | |
1676 | ||
20380731 | 1677 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1678 | { |
1679 | struct in6_addr addr; | |
88ad3149 | 1680 | if (ifp->prefix_len >= 127) /* RFC 6164 */ |
2bda8a0c | 1681 | return; |
1da177e4 LT |
1682 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
1683 | if (ipv6_addr_any(&addr)) | |
1684 | return; | |
1685 | ipv6_dev_ac_inc(ifp->idev->dev, &addr); | |
1686 | } | |
1687 | ||
20380731 | 1688 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1689 | { |
1690 | struct in6_addr addr; | |
88ad3149 | 1691 | if (ifp->prefix_len >= 127) /* RFC 6164 */ |
32019e65 | 1692 | return; |
1da177e4 LT |
1693 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
1694 | if (ipv6_addr_any(&addr)) | |
1695 | return; | |
1696 | __ipv6_dev_ac_dec(ifp->idev, &addr); | |
1697 | } | |
1698 | ||
073a8e0e YH |
1699 | static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) |
1700 | { | |
1701 | if (dev->addr_len != ETH_ALEN) | |
1702 | return -1; | |
1703 | memcpy(eui, dev->dev_addr, 3); | |
1704 | memcpy(eui + 5, dev->dev_addr + 3, 3); | |
1705 | ||
1706 | /* | |
1707 | * The zSeries OSA network cards can be shared among various | |
1708 | * OS instances, but the OSA cards have only one MAC address. | |
1709 | * This leads to duplicate address conflicts in conjunction | |
1710 | * with IPv6 if more than one instance uses the same card. | |
1711 | * | |
1712 | * The driver for these cards can deliver a unique 16-bit | |
1713 | * identifier for each instance sharing the same card. It is | |
1714 | * placed instead of 0xFFFE in the interface identifier. The | |
1715 | * "u" bit of the interface identifier is not inverted in this | |
1716 | * case. Hence the resulting interface identifier has local | |
1717 | * scope according to RFC2373. | |
1718 | */ | |
1719 | if (dev->dev_id) { | |
1720 | eui[3] = (dev->dev_id >> 8) & 0xFF; | |
1721 | eui[4] = dev->dev_id & 0xFF; | |
1722 | } else { | |
1723 | eui[3] = 0xFF; | |
1724 | eui[4] = 0xFE; | |
1725 | eui[0] ^= 2; | |
1726 | } | |
1727 | return 0; | |
1728 | } | |
1729 | ||
06a4c1c5 | 1730 | static int addrconf_ifid_eui64(u8 *eui, struct net_device *dev) |
1731 | { | |
1732 | if (dev->addr_len != IEEE802154_ADDR_LEN) | |
1733 | return -1; | |
1734 | memcpy(eui, dev->dev_addr, 8); | |
5e98a36e | 1735 | eui[0] ^= 2; |
06a4c1c5 | 1736 | return 0; |
1737 | } | |
1738 | ||
cb6bf355 YH |
1739 | static int addrconf_ifid_ieee1394(u8 *eui, struct net_device *dev) |
1740 | { | |
1741 | union fwnet_hwaddr *ha; | |
1742 | ||
1743 | if (dev->addr_len != FWNET_ALEN) | |
1744 | return -1; | |
1745 | ||
1746 | ha = (union fwnet_hwaddr *)dev->dev_addr; | |
1747 | ||
1748 | memcpy(eui, &ha->uc.uniq_id, sizeof(ha->uc.uniq_id)); | |
1749 | eui[0] ^= 2; | |
1750 | return 0; | |
1751 | } | |
1752 | ||
073a8e0e YH |
1753 | static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) |
1754 | { | |
1755 | /* XXX: inherit EUI-64 from other interface -- yoshfuji */ | |
1756 | if (dev->addr_len != ARCNET_ALEN) | |
1757 | return -1; | |
1758 | memset(eui, 0, 7); | |
8e5e8f30 | 1759 | eui[7] = *(u8 *)dev->dev_addr; |
073a8e0e YH |
1760 | return 0; |
1761 | } | |
1762 | ||
1763 | static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) | |
1764 | { | |
1765 | if (dev->addr_len != INFINIBAND_ALEN) | |
1766 | return -1; | |
1767 | memcpy(eui, dev->dev_addr + 12, 8); | |
1768 | eui[0] |= 2; | |
1769 | return 0; | |
1770 | } | |
1771 | ||
c61393ea | 1772 | static int __ipv6_isatap_ifid(u8 *eui, __be32 addr) |
dfd982ba | 1773 | { |
9af28511 SH |
1774 | if (addr == 0) |
1775 | return -1; | |
dfd982ba YH |
1776 | eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) || |
1777 | ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) || | |
1778 | ipv4_is_private_172(addr) || ipv4_is_test_192(addr) || | |
1779 | ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) || | |
1780 | ipv4_is_test_198(addr) || ipv4_is_multicast(addr) || | |
1781 | ipv4_is_lbcast(addr)) ? 0x00 : 0x02; | |
1782 | eui[1] = 0; | |
1783 | eui[2] = 0x5E; | |
1784 | eui[3] = 0xFE; | |
1785 | memcpy(eui + 4, &addr, 4); | |
1786 | return 0; | |
1787 | } | |
dfd982ba YH |
1788 | |
1789 | static int addrconf_ifid_sit(u8 *eui, struct net_device *dev) | |
1790 | { | |
1791 | if (dev->priv_flags & IFF_ISATAP) | |
1792 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); | |
1793 | return -1; | |
1794 | } | |
1795 | ||
aee80b54 | 1796 | static int addrconf_ifid_gre(u8 *eui, struct net_device *dev) |
1797 | { | |
1798 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); | |
1799 | } | |
1800 | ||
e837735e ND |
1801 | static int addrconf_ifid_ip6tnl(u8 *eui, struct net_device *dev) |
1802 | { | |
1803 | memcpy(eui, dev->perm_addr, 3); | |
1804 | memcpy(eui + 5, dev->perm_addr + 3, 3); | |
1805 | eui[3] = 0xFF; | |
1806 | eui[4] = 0xFE; | |
1807 | eui[0] ^= 2; | |
1808 | return 0; | |
1809 | } | |
1810 | ||
1da177e4 LT |
1811 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) |
1812 | { | |
1813 | switch (dev->type) { | |
1814 | case ARPHRD_ETHER: | |
1815 | case ARPHRD_FDDI: | |
073a8e0e | 1816 | return addrconf_ifid_eui48(eui, dev); |
1da177e4 | 1817 | case ARPHRD_ARCNET: |
073a8e0e | 1818 | return addrconf_ifid_arcnet(eui, dev); |
1da177e4 | 1819 | case ARPHRD_INFINIBAND: |
073a8e0e | 1820 | return addrconf_ifid_infiniband(eui, dev); |
c7dc89c0 | 1821 | case ARPHRD_SIT: |
dfd982ba | 1822 | return addrconf_ifid_sit(eui, dev); |
aee80b54 | 1823 | case ARPHRD_IPGRE: |
1824 | return addrconf_ifid_gre(eui, dev); | |
e74bccb8 | 1825 | case ARPHRD_6LOWPAN: |
06a4c1c5 | 1826 | case ARPHRD_IEEE802154: |
1827 | return addrconf_ifid_eui64(eui, dev); | |
cb6bf355 YH |
1828 | case ARPHRD_IEEE1394: |
1829 | return addrconf_ifid_ieee1394(eui, dev); | |
e837735e ND |
1830 | case ARPHRD_TUNNEL6: |
1831 | return addrconf_ifid_ip6tnl(eui, dev); | |
1da177e4 LT |
1832 | } |
1833 | return -1; | |
1834 | } | |
1835 | ||
1836 | static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) | |
1837 | { | |
1838 | int err = -1; | |
1839 | struct inet6_ifaddr *ifp; | |
1840 | ||
1841 | read_lock_bh(&idev->lock); | |
502a2ffd | 1842 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
1da177e4 LT |
1843 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { |
1844 | memcpy(eui, ifp->addr.s6_addr+8, 8); | |
1845 | err = 0; | |
1846 | break; | |
1847 | } | |
1848 | } | |
1849 | read_unlock_bh(&idev->lock); | |
1850 | return err; | |
1851 | } | |
1852 | ||
1da177e4 | 1853 | /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ |
eb7e0575 | 1854 | static void __ipv6_regen_rndid(struct inet6_dev *idev) |
1da177e4 | 1855 | { |
1da177e4 | 1856 | regen: |
955189ef | 1857 | get_random_bytes(idev->rndid, sizeof(idev->rndid)); |
1da177e4 | 1858 | idev->rndid[0] &= ~0x02; |
1da177e4 LT |
1859 | |
1860 | /* | |
1861 | * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: | |
1862 | * check if generated address is not inappropriate | |
1863 | * | |
1864 | * - Reserved subnet anycast (RFC 2526) | |
1865 | * 11111101 11....11 1xxxxxxx | |
c7dc89c0 | 1866 | * - ISATAP (RFC4214) 6.1 |
1da177e4 LT |
1867 | * 00-00-5E-FE-xx-xx-xx-xx |
1868 | * - value 0 | |
1869 | * - XXX: already assigned to an address on the device | |
1870 | */ | |
1ab1457c | 1871 | if (idev->rndid[0] == 0xfd && |
1da177e4 LT |
1872 | (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && |
1873 | (idev->rndid[7]&0x80)) | |
1874 | goto regen; | |
1875 | if ((idev->rndid[0]|idev->rndid[1]) == 0) { | |
1876 | if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) | |
1877 | goto regen; | |
1878 | if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) | |
1879 | goto regen; | |
1880 | } | |
1da177e4 LT |
1881 | } |
1882 | ||
1883 | static void ipv6_regen_rndid(unsigned long data) | |
1884 | { | |
1885 | struct inet6_dev *idev = (struct inet6_dev *) data; | |
1886 | unsigned long expires; | |
1887 | ||
8814c4b5 | 1888 | rcu_read_lock_bh(); |
1da177e4 LT |
1889 | write_lock_bh(&idev->lock); |
1890 | ||
1891 | if (idev->dead) | |
1892 | goto out; | |
1893 | ||
eb7e0575 | 1894 | __ipv6_regen_rndid(idev); |
1ab1457c | 1895 | |
1da177e4 | 1896 | expires = jiffies + |
1ab1457c | 1897 | idev->cnf.temp_prefered_lft * HZ - |
1f9248e5 JP |
1898 | idev->cnf.regen_max_retry * idev->cnf.dad_transmits * |
1899 | NEIGH_VAR(idev->nd_parms, RETRANS_TIME) - | |
784e2710 | 1900 | idev->cnf.max_desync_factor * HZ; |
1da177e4 | 1901 | if (time_before(expires, jiffies)) { |
f3213831 JP |
1902 | pr_warn("%s: too short regeneration interval; timer disabled for %s\n", |
1903 | __func__, idev->dev->name); | |
1da177e4 LT |
1904 | goto out; |
1905 | } | |
1906 | ||
1907 | if (!mod_timer(&idev->regen_timer, expires)) | |
1908 | in6_dev_hold(idev); | |
1909 | ||
1910 | out: | |
1911 | write_unlock_bh(&idev->lock); | |
8814c4b5 | 1912 | rcu_read_unlock_bh(); |
1da177e4 LT |
1913 | in6_dev_put(idev); |
1914 | } | |
1915 | ||
eb7e0575 | 1916 | static void __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) |
8e5e8f30 | 1917 | { |
1da177e4 | 1918 | if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) |
eb7e0575 | 1919 | __ipv6_regen_rndid(idev); |
1da177e4 | 1920 | } |
1da177e4 LT |
1921 | |
1922 | /* | |
1923 | * Add prefix route. | |
1924 | */ | |
1925 | ||
1926 | static void | |
1927 | addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev, | |
e431b8c0 | 1928 | unsigned long expires, u32 flags) |
1da177e4 | 1929 | { |
86872cb5 TG |
1930 | struct fib6_config cfg = { |
1931 | .fc_table = RT6_TABLE_PREFIX, | |
1932 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1933 | .fc_ifindex = dev->ifindex, | |
1934 | .fc_expires = expires, | |
1935 | .fc_dst_len = plen, | |
1936 | .fc_flags = RTF_UP | flags, | |
c346dca1 | 1937 | .fc_nlinfo.nl_net = dev_net(dev), |
f410a1fb | 1938 | .fc_protocol = RTPROT_KERNEL, |
86872cb5 | 1939 | }; |
1da177e4 | 1940 | |
4e3fd7a0 | 1941 | cfg.fc_dst = *pfx; |
1da177e4 LT |
1942 | |
1943 | /* Prevent useless cloning on PtP SIT. | |
1944 | This thing is done here expecting that the whole | |
1945 | class of non-broadcast devices need not cloning. | |
1946 | */ | |
07a93626 | 1947 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
86872cb5 TG |
1948 | if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT)) |
1949 | cfg.fc_flags |= RTF_NONEXTHOP; | |
0be669bb | 1950 | #endif |
1da177e4 | 1951 | |
86872cb5 | 1952 | ip6_route_add(&cfg); |
1da177e4 LT |
1953 | } |
1954 | ||
14ef37b6 AH |
1955 | |
1956 | static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx, | |
1957 | int plen, | |
1958 | const struct net_device *dev, | |
1959 | u32 flags, u32 noflags) | |
1960 | { | |
1961 | struct fib6_node *fn; | |
1962 | struct rt6_info *rt = NULL; | |
1963 | struct fib6_table *table; | |
1964 | ||
1965 | table = fib6_get_table(dev_net(dev), RT6_TABLE_PREFIX); | |
1966 | if (table == NULL) | |
1967 | return NULL; | |
1968 | ||
5744dd9b | 1969 | read_lock_bh(&table->tb6_lock); |
14ef37b6 AH |
1970 | fn = fib6_locate(&table->tb6_root, pfx, plen, NULL, 0); |
1971 | if (!fn) | |
1972 | goto out; | |
1973 | for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) { | |
d1918542 | 1974 | if (rt->dst.dev->ifindex != dev->ifindex) |
14ef37b6 AH |
1975 | continue; |
1976 | if ((rt->rt6i_flags & flags) != flags) | |
1977 | continue; | |
85da53bf | 1978 | if ((rt->rt6i_flags & noflags) != 0) |
14ef37b6 AH |
1979 | continue; |
1980 | dst_hold(&rt->dst); | |
1981 | break; | |
1982 | } | |
1983 | out: | |
5744dd9b | 1984 | read_unlock_bh(&table->tb6_lock); |
14ef37b6 AH |
1985 | return rt; |
1986 | } | |
1987 | ||
1988 | ||
1da177e4 LT |
1989 | /* Create "default" multicast route to the interface */ |
1990 | ||
1991 | static void addrconf_add_mroute(struct net_device *dev) | |
1992 | { | |
86872cb5 TG |
1993 | struct fib6_config cfg = { |
1994 | .fc_table = RT6_TABLE_LOCAL, | |
1995 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
1996 | .fc_ifindex = dev->ifindex, | |
1997 | .fc_dst_len = 8, | |
1998 | .fc_flags = RTF_UP, | |
c346dca1 | 1999 | .fc_nlinfo.nl_net = dev_net(dev), |
86872cb5 TG |
2000 | }; |
2001 | ||
2002 | ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); | |
2003 | ||
2004 | ip6_route_add(&cfg); | |
1da177e4 LT |
2005 | } |
2006 | ||
1da177e4 LT |
2007 | static struct inet6_dev *addrconf_add_dev(struct net_device *dev) |
2008 | { | |
2009 | struct inet6_dev *idev; | |
2010 | ||
2011 | ASSERT_RTNL(); | |
2012 | ||
e21e8467 SH |
2013 | idev = ipv6_find_idev(dev); |
2014 | if (!idev) | |
64e724f6 BH |
2015 | return ERR_PTR(-ENOBUFS); |
2016 | ||
2017 | if (idev->cnf.disable_ipv6) | |
2018 | return ERR_PTR(-EACCES); | |
1da177e4 LT |
2019 | |
2020 | /* Add default multicast route */ | |
4af04aba LW |
2021 | if (!(dev->flags & IFF_LOOPBACK)) |
2022 | addrconf_add_mroute(dev); | |
1da177e4 | 2023 | |
1da177e4 LT |
2024 | return idev; |
2025 | } | |
2026 | ||
53bd6749 JP |
2027 | static void manage_tempaddrs(struct inet6_dev *idev, |
2028 | struct inet6_ifaddr *ifp, | |
2029 | __u32 valid_lft, __u32 prefered_lft, | |
2030 | bool create, unsigned long now) | |
2031 | { | |
2032 | u32 flags; | |
2033 | struct inet6_ifaddr *ift; | |
2034 | ||
2035 | read_lock_bh(&idev->lock); | |
2036 | /* update all temporary addresses in the list */ | |
2037 | list_for_each_entry(ift, &idev->tempaddr_list, tmp_list) { | |
2038 | int age, max_valid, max_prefered; | |
2039 | ||
2040 | if (ifp != ift->ifpub) | |
2041 | continue; | |
2042 | ||
2043 | /* RFC 4941 section 3.3: | |
2044 | * If a received option will extend the lifetime of a public | |
2045 | * address, the lifetimes of temporary addresses should | |
2046 | * be extended, subject to the overall constraint that no | |
2047 | * temporary addresses should ever remain "valid" or "preferred" | |
2048 | * for a time longer than (TEMP_VALID_LIFETIME) or | |
2049 | * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR), respectively. | |
2050 | */ | |
2051 | age = (now - ift->cstamp) / HZ; | |
2052 | max_valid = idev->cnf.temp_valid_lft - age; | |
2053 | if (max_valid < 0) | |
2054 | max_valid = 0; | |
2055 | ||
2056 | max_prefered = idev->cnf.temp_prefered_lft - | |
2057 | idev->cnf.max_desync_factor - age; | |
2058 | if (max_prefered < 0) | |
2059 | max_prefered = 0; | |
2060 | ||
2061 | if (valid_lft > max_valid) | |
2062 | valid_lft = max_valid; | |
2063 | ||
2064 | if (prefered_lft > max_prefered) | |
2065 | prefered_lft = max_prefered; | |
2066 | ||
2067 | spin_lock(&ift->lock); | |
2068 | flags = ift->flags; | |
2069 | ift->valid_lft = valid_lft; | |
2070 | ift->prefered_lft = prefered_lft; | |
2071 | ift->tstamp = now; | |
2072 | if (prefered_lft > 0) | |
2073 | ift->flags &= ~IFA_F_DEPRECATED; | |
2074 | ||
2075 | spin_unlock(&ift->lock); | |
2076 | if (!(flags&IFA_F_TENTATIVE)) | |
2077 | ipv6_ifa_notify(0, ift); | |
2078 | } | |
2079 | ||
2080 | if ((create || list_empty(&idev->tempaddr_list)) && | |
2081 | idev->cnf.use_tempaddr > 0) { | |
2082 | /* When a new public address is created as described | |
2083 | * in [ADDRCONF], also create a new temporary address. | |
2084 | * Also create a temporary address if it's enabled but | |
2085 | * no temporary address currently exists. | |
2086 | */ | |
2087 | read_unlock_bh(&idev->lock); | |
2088 | ipv6_create_tempaddr(ifp, NULL); | |
2089 | } else { | |
2090 | read_unlock_bh(&idev->lock); | |
2091 | } | |
2092 | } | |
2093 | ||
e6bff995 | 2094 | void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao) |
1da177e4 LT |
2095 | { |
2096 | struct prefix_info *pinfo; | |
2097 | __u32 valid_lft; | |
2098 | __u32 prefered_lft; | |
2099 | int addr_type; | |
1da177e4 | 2100 | struct inet6_dev *in6_dev; |
56d417b1 | 2101 | struct net *net = dev_net(dev); |
1da177e4 LT |
2102 | |
2103 | pinfo = (struct prefix_info *) opt; | |
1ab1457c | 2104 | |
1da177e4 | 2105 | if (len < sizeof(struct prefix_info)) { |
ba3542e1 | 2106 | ADBG("addrconf: prefix option too short\n"); |
1da177e4 LT |
2107 | return; |
2108 | } | |
1ab1457c | 2109 | |
1da177e4 LT |
2110 | /* |
2111 | * Validation checks ([ADDRCONF], page 19) | |
2112 | */ | |
2113 | ||
2114 | addr_type = ipv6_addr_type(&pinfo->prefix); | |
2115 | ||
2116 | if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) | |
2117 | return; | |
2118 | ||
2119 | valid_lft = ntohl(pinfo->valid); | |
2120 | prefered_lft = ntohl(pinfo->prefered); | |
2121 | ||
2122 | if (prefered_lft > valid_lft) { | |
e87cc472 | 2123 | net_warn_ratelimited("addrconf: prefix option has invalid lifetime\n"); |
1da177e4 LT |
2124 | return; |
2125 | } | |
2126 | ||
2127 | in6_dev = in6_dev_get(dev); | |
2128 | ||
2129 | if (in6_dev == NULL) { | |
e87cc472 JP |
2130 | net_dbg_ratelimited("addrconf: device %s not configured\n", |
2131 | dev->name); | |
1da177e4 LT |
2132 | return; |
2133 | } | |
2134 | ||
2135 | /* | |
2136 | * Two things going on here: | |
2137 | * 1) Add routes for on-link prefixes | |
2138 | * 2) Configure prefixes with the auto flag set | |
2139 | */ | |
2140 | ||
4bed72e4 YH |
2141 | if (pinfo->onlink) { |
2142 | struct rt6_info *rt; | |
2143 | unsigned long rt_expires; | |
2144 | ||
6f704992 YH |
2145 | /* Avoid arithmetic overflow. Really, we could |
2146 | * save rt_expires in seconds, likely valid_lft, | |
2147 | * but it would require division in fib gc, that it | |
2148 | * not good. | |
2149 | */ | |
4bed72e4 YH |
2150 | if (HZ > USER_HZ) |
2151 | rt_expires = addrconf_timeout_fixup(valid_lft, HZ); | |
2152 | else | |
2153 | rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ); | |
3dd4bc68 | 2154 | |
4bed72e4 YH |
2155 | if (addrconf_finite_timeout(rt_expires)) |
2156 | rt_expires *= HZ; | |
1da177e4 | 2157 | |
14ef37b6 AH |
2158 | rt = addrconf_get_prefix_route(&pinfo->prefix, |
2159 | pinfo->prefix_len, | |
2160 | dev, | |
2161 | RTF_ADDRCONF | RTF_PREFIX_RT, | |
2162 | RTF_GATEWAY | RTF_DEFAULT); | |
1da177e4 | 2163 | |
14ef37b6 | 2164 | if (rt) { |
6f704992 YH |
2165 | /* Autoconf prefix route */ |
2166 | if (valid_lft == 0) { | |
2167 | ip6_del_rt(rt); | |
2168 | rt = NULL; | |
4bed72e4 | 2169 | } else if (addrconf_finite_timeout(rt_expires)) { |
6f704992 | 2170 | /* not infinity */ |
1716a961 | 2171 | rt6_set_expires(rt, jiffies + rt_expires); |
6f704992 | 2172 | } else { |
1716a961 | 2173 | rt6_clean_expires(rt); |
1da177e4 LT |
2174 | } |
2175 | } else if (valid_lft) { | |
6f704992 | 2176 | clock_t expires = 0; |
4bed72e4 YH |
2177 | int flags = RTF_ADDRCONF | RTF_PREFIX_RT; |
2178 | if (addrconf_finite_timeout(rt_expires)) { | |
6f704992 YH |
2179 | /* not infinity */ |
2180 | flags |= RTF_EXPIRES; | |
2181 | expires = jiffies_to_clock_t(rt_expires); | |
2182 | } | |
1da177e4 | 2183 | addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, |
6f704992 | 2184 | dev, expires, flags); |
1da177e4 | 2185 | } |
94e187c0 | 2186 | ip6_rt_put(rt); |
1da177e4 LT |
2187 | } |
2188 | ||
2189 | /* Try to figure out our local address for this prefix */ | |
2190 | ||
2191 | if (pinfo->autoconf && in6_dev->cnf.autoconf) { | |
8e5e8f30 | 2192 | struct inet6_ifaddr *ifp; |
1da177e4 LT |
2193 | struct in6_addr addr; |
2194 | int create = 0, update_lft = 0; | |
617fe29d | 2195 | bool tokenized = false; |
1da177e4 LT |
2196 | |
2197 | if (pinfo->prefix_len == 64) { | |
2198 | memcpy(&addr, &pinfo->prefix, 8); | |
f53adae4 DB |
2199 | |
2200 | if (!ipv6_addr_any(&in6_dev->token)) { | |
2201 | read_lock_bh(&in6_dev->lock); | |
2202 | memcpy(addr.s6_addr + 8, | |
2203 | in6_dev->token.s6_addr + 8, 8); | |
2204 | read_unlock_bh(&in6_dev->lock); | |
617fe29d | 2205 | tokenized = true; |
f53adae4 DB |
2206 | } else if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && |
2207 | ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { | |
1da177e4 LT |
2208 | in6_dev_put(in6_dev); |
2209 | return; | |
2210 | } | |
2211 | goto ok; | |
2212 | } | |
e87cc472 JP |
2213 | net_dbg_ratelimited("IPv6 addrconf: prefix with wrong length %d\n", |
2214 | pinfo->prefix_len); | |
1da177e4 LT |
2215 | in6_dev_put(in6_dev); |
2216 | return; | |
2217 | ||
2218 | ok: | |
2219 | ||
53b7997f | 2220 | ifp = ipv6_get_ifaddr(net, &addr, dev, 1); |
1da177e4 LT |
2221 | |
2222 | if (ifp == NULL && valid_lft) { | |
2223 | int max_addresses = in6_dev->cnf.max_addresses; | |
95c385b4 NH |
2224 | u32 addr_flags = 0; |
2225 | ||
2226 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
2227 | if (in6_dev->cnf.optimistic_dad && | |
e6bff995 | 2228 | !net->ipv6.devconf_all->forwarding && sllao) |
95c385b4 NH |
2229 | addr_flags = IFA_F_OPTIMISTIC; |
2230 | #endif | |
1da177e4 LT |
2231 | |
2232 | /* Do not allow to create too much of autoconfigured | |
2233 | * addresses; this would be too easy way to crash kernel. | |
2234 | */ | |
2235 | if (!max_addresses || | |
2236 | ipv6_count_addresses(in6_dev) < max_addresses) | |
3f8f5298 JP |
2237 | ifp = ipv6_add_addr(in6_dev, &addr, NULL, |
2238 | pinfo->prefix_len, | |
95c385b4 | 2239 | addr_type&IPV6_ADDR_SCOPE_MASK, |
8a226b2c JB |
2240 | addr_flags, valid_lft, |
2241 | prefered_lft); | |
1da177e4 | 2242 | |
3f0d2ba0 | 2243 | if (IS_ERR_OR_NULL(ifp)) { |
1da177e4 LT |
2244 | in6_dev_put(in6_dev); |
2245 | return; | |
2246 | } | |
2247 | ||
53bd6749 | 2248 | ifp->flags |= IFA_F_MANAGETEMPADDR; |
8a226b2c JB |
2249 | update_lft = 0; |
2250 | create = 1; | |
1da177e4 | 2251 | ifp->cstamp = jiffies; |
617fe29d | 2252 | ifp->tokenized = tokenized; |
cf22f9a2 | 2253 | addrconf_dad_start(ifp); |
1da177e4 LT |
2254 | } |
2255 | ||
2256 | if (ifp) { | |
479840ff | 2257 | u32 flags; |
1da177e4 | 2258 | unsigned long now; |
1da177e4 LT |
2259 | u32 stored_lft; |
2260 | ||
2261 | /* update lifetime (RFC2462 5.5.3 e) */ | |
2262 | spin_lock(&ifp->lock); | |
2263 | now = jiffies; | |
2264 | if (ifp->valid_lft > (now - ifp->tstamp) / HZ) | |
2265 | stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; | |
2266 | else | |
2267 | stored_lft = 0; | |
8a226b2c | 2268 | if (!update_lft && !create && stored_lft) { |
c9d55d5b PM |
2269 | const u32 minimum_lft = min( |
2270 | stored_lft, (u32)MIN_VALID_LIFETIME); | |
2271 | valid_lft = max(valid_lft, minimum_lft); | |
2272 | ||
2273 | /* RFC4862 Section 5.5.3e: | |
2274 | * "Note that the preferred lifetime of the | |
2275 | * corresponding address is always reset to | |
2276 | * the Preferred Lifetime in the received | |
2277 | * Prefix Information option, regardless of | |
2278 | * whether the valid lifetime is also reset or | |
2279 | * ignored." | |
2280 | * | |
2281 | * So we should always update prefered_lft here. | |
2282 | */ | |
2283 | update_lft = 1; | |
1da177e4 LT |
2284 | } |
2285 | ||
2286 | if (update_lft) { | |
2287 | ifp->valid_lft = valid_lft; | |
2288 | ifp->prefered_lft = prefered_lft; | |
2289 | ifp->tstamp = now; | |
2290 | flags = ifp->flags; | |
2291 | ifp->flags &= ~IFA_F_DEPRECATED; | |
2292 | spin_unlock(&ifp->lock); | |
2293 | ||
2294 | if (!(flags&IFA_F_TENTATIVE)) | |
2295 | ipv6_ifa_notify(0, ifp); | |
2296 | } else | |
2297 | spin_unlock(&ifp->lock); | |
2298 | ||
53bd6749 JP |
2299 | manage_tempaddrs(in6_dev, ifp, valid_lft, prefered_lft, |
2300 | create, now); | |
5d9efa7e | 2301 | |
1da177e4 LT |
2302 | in6_ifa_put(ifp); |
2303 | addrconf_verify(0); | |
2304 | } | |
2305 | } | |
2306 | inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); | |
2307 | in6_dev_put(in6_dev); | |
2308 | } | |
2309 | ||
2310 | /* | |
2311 | * Set destination address. | |
2312 | * Special case for SIT interfaces where we create a new "virtual" | |
2313 | * device. | |
2314 | */ | |
af284937 | 2315 | int addrconf_set_dstaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2316 | { |
2317 | struct in6_ifreq ireq; | |
2318 | struct net_device *dev; | |
2319 | int err = -EINVAL; | |
2320 | ||
2321 | rtnl_lock(); | |
2322 | ||
2323 | err = -EFAULT; | |
2324 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2325 | goto err_exit; | |
2326 | ||
af284937 | 2327 | dev = __dev_get_by_index(net, ireq.ifr6_ifindex); |
1da177e4 LT |
2328 | |
2329 | err = -ENODEV; | |
2330 | if (dev == NULL) | |
2331 | goto err_exit; | |
2332 | ||
07a93626 | 2333 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 | 2334 | if (dev->type == ARPHRD_SIT) { |
5bc3eb7e | 2335 | const struct net_device_ops *ops = dev->netdev_ops; |
1da177e4 | 2336 | struct ifreq ifr; |
1da177e4 LT |
2337 | struct ip_tunnel_parm p; |
2338 | ||
2339 | err = -EADDRNOTAVAIL; | |
2340 | if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) | |
2341 | goto err_exit; | |
2342 | ||
2343 | memset(&p, 0, sizeof(p)); | |
2344 | p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; | |
2345 | p.iph.saddr = 0; | |
2346 | p.iph.version = 4; | |
2347 | p.iph.ihl = 5; | |
2348 | p.iph.protocol = IPPROTO_IPV6; | |
2349 | p.iph.ttl = 64; | |
d20b3109 | 2350 | ifr.ifr_ifru.ifru_data = (__force void __user *)&p; |
1da177e4 | 2351 | |
5bc3eb7e SH |
2352 | if (ops->ndo_do_ioctl) { |
2353 | mm_segment_t oldfs = get_fs(); | |
2354 | ||
2355 | set_fs(KERNEL_DS); | |
2356 | err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL); | |
2357 | set_fs(oldfs); | |
2358 | } else | |
2359 | err = -EOPNOTSUPP; | |
1da177e4 LT |
2360 | |
2361 | if (err == 0) { | |
2362 | err = -ENOBUFS; | |
af284937 DL |
2363 | dev = __dev_get_by_name(net, p.name); |
2364 | if (!dev) | |
1da177e4 LT |
2365 | goto err_exit; |
2366 | err = dev_open(dev); | |
2367 | } | |
2368 | } | |
0be669bb | 2369 | #endif |
1da177e4 LT |
2370 | |
2371 | err_exit: | |
2372 | rtnl_unlock(); | |
2373 | return err; | |
2374 | } | |
2375 | ||
2376 | /* | |
2377 | * Manual configuration of address on an interface | |
2378 | */ | |
479840ff JP |
2379 | static int inet6_addr_add(struct net *net, int ifindex, |
2380 | const struct in6_addr *pfx, | |
caeaba79 | 2381 | const struct in6_addr *peer_pfx, |
479840ff JP |
2382 | unsigned int plen, __u32 ifa_flags, |
2383 | __u32 prefered_lft, __u32 valid_lft) | |
1da177e4 LT |
2384 | { |
2385 | struct inet6_ifaddr *ifp; | |
2386 | struct inet6_dev *idev; | |
2387 | struct net_device *dev; | |
2388 | int scope; | |
6f704992 YH |
2389 | u32 flags; |
2390 | clock_t expires; | |
4bed72e4 | 2391 | unsigned long timeout; |
1da177e4 LT |
2392 | |
2393 | ASSERT_RTNL(); | |
1ab1457c | 2394 | |
24ef0da7 TG |
2395 | if (plen > 128) |
2396 | return -EINVAL; | |
2397 | ||
0778769d NT |
2398 | /* check the lifetime */ |
2399 | if (!valid_lft || prefered_lft > valid_lft) | |
2400 | return -EINVAL; | |
2401 | ||
53bd6749 JP |
2402 | if (ifa_flags & IFA_F_MANAGETEMPADDR && plen != 64) |
2403 | return -EINVAL; | |
2404 | ||
af284937 DL |
2405 | dev = __dev_get_by_index(net, ifindex); |
2406 | if (!dev) | |
1da177e4 | 2407 | return -ENODEV; |
1ab1457c | 2408 | |
64e724f6 BH |
2409 | idev = addrconf_add_dev(dev); |
2410 | if (IS_ERR(idev)) | |
2411 | return PTR_ERR(idev); | |
1da177e4 LT |
2412 | |
2413 | scope = ipv6_addr_scope(pfx); | |
2414 | ||
4bed72e4 YH |
2415 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
2416 | if (addrconf_finite_timeout(timeout)) { | |
2417 | expires = jiffies_to_clock_t(timeout * HZ); | |
2418 | valid_lft = timeout; | |
6f704992 | 2419 | flags = RTF_EXPIRES; |
4bed72e4 YH |
2420 | } else { |
2421 | expires = 0; | |
2422 | flags = 0; | |
2423 | ifa_flags |= IFA_F_PERMANENT; | |
6f704992 | 2424 | } |
0778769d | 2425 | |
4bed72e4 YH |
2426 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
2427 | if (addrconf_finite_timeout(timeout)) { | |
2428 | if (timeout == 0) | |
2429 | ifa_flags |= IFA_F_DEPRECATED; | |
2430 | prefered_lft = timeout; | |
2431 | } | |
0778769d | 2432 | |
8a226b2c JB |
2433 | ifp = ipv6_add_addr(idev, pfx, peer_pfx, plen, scope, ifa_flags, |
2434 | valid_lft, prefered_lft); | |
0778769d | 2435 | |
1da177e4 | 2436 | if (!IS_ERR(ifp)) { |
46d48046 | 2437 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, |
6f704992 | 2438 | expires, flags); |
95c385b4 NH |
2439 | /* |
2440 | * Note that section 3.1 of RFC 4429 indicates | |
2441 | * that the Optimistic flag should not be set for | |
2442 | * manually configured addresses | |
2443 | */ | |
cf22f9a2 | 2444 | addrconf_dad_start(ifp); |
53bd6749 JP |
2445 | if (ifa_flags & IFA_F_MANAGETEMPADDR) |
2446 | manage_tempaddrs(idev, ifp, valid_lft, prefered_lft, | |
2447 | true, jiffies); | |
1da177e4 | 2448 | in6_ifa_put(ifp); |
0778769d | 2449 | addrconf_verify(0); |
1da177e4 LT |
2450 | return 0; |
2451 | } | |
2452 | ||
2453 | return PTR_ERR(ifp); | |
2454 | } | |
2455 | ||
b71d1d42 | 2456 | static int inet6_addr_del(struct net *net, int ifindex, const struct in6_addr *pfx, |
24ef0da7 | 2457 | unsigned int plen) |
1da177e4 LT |
2458 | { |
2459 | struct inet6_ifaddr *ifp; | |
2460 | struct inet6_dev *idev; | |
2461 | struct net_device *dev; | |
1ab1457c | 2462 | |
24ef0da7 TG |
2463 | if (plen > 128) |
2464 | return -EINVAL; | |
2465 | ||
af284937 DL |
2466 | dev = __dev_get_by_index(net, ifindex); |
2467 | if (!dev) | |
1da177e4 LT |
2468 | return -ENODEV; |
2469 | ||
7eaa48a4 | 2470 | if ((idev = __in6_dev_get(dev)) == NULL) |
1da177e4 LT |
2471 | return -ENXIO; |
2472 | ||
2473 | read_lock_bh(&idev->lock); | |
502a2ffd | 2474 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
1da177e4 LT |
2475 | if (ifp->prefix_len == plen && |
2476 | ipv6_addr_equal(pfx, &ifp->addr)) { | |
2477 | in6_ifa_hold(ifp); | |
2478 | read_unlock_bh(&idev->lock); | |
1ab1457c | 2479 | |
1da177e4 | 2480 | ipv6_del_addr(ifp); |
1da177e4 LT |
2481 | return 0; |
2482 | } | |
2483 | } | |
2484 | read_unlock_bh(&idev->lock); | |
2485 | return -EADDRNOTAVAIL; | |
2486 | } | |
2487 | ||
2488 | ||
af284937 | 2489 | int addrconf_add_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2490 | { |
2491 | struct in6_ifreq ireq; | |
2492 | int err; | |
1ab1457c | 2493 | |
af31f412 | 2494 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 | 2495 | return -EPERM; |
1ab1457c | 2496 | |
1da177e4 LT |
2497 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
2498 | return -EFAULT; | |
2499 | ||
2500 | rtnl_lock(); | |
caeaba79 | 2501 | err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, NULL, |
af284937 DL |
2502 | ireq.ifr6_prefixlen, IFA_F_PERMANENT, |
2503 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); | |
1da177e4 LT |
2504 | rtnl_unlock(); |
2505 | return err; | |
2506 | } | |
2507 | ||
af284937 | 2508 | int addrconf_del_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2509 | { |
2510 | struct in6_ifreq ireq; | |
2511 | int err; | |
1ab1457c | 2512 | |
af31f412 | 2513 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 LT |
2514 | return -EPERM; |
2515 | ||
2516 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2517 | return -EFAULT; | |
2518 | ||
2519 | rtnl_lock(); | |
af284937 DL |
2520 | err = inet6_addr_del(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, |
2521 | ireq.ifr6_prefixlen); | |
1da177e4 LT |
2522 | rtnl_unlock(); |
2523 | return err; | |
2524 | } | |
2525 | ||
b5f348e5 IJ |
2526 | static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr, |
2527 | int plen, int scope) | |
2528 | { | |
2529 | struct inet6_ifaddr *ifp; | |
2530 | ||
8a226b2c | 2531 | ifp = ipv6_add_addr(idev, addr, NULL, plen, |
07edd741 HFS |
2532 | scope, IFA_F_PERMANENT, |
2533 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); | |
b5f348e5 IJ |
2534 | if (!IS_ERR(ifp)) { |
2535 | spin_lock_bh(&ifp->lock); | |
2536 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2537 | spin_unlock_bh(&ifp->lock); | |
2538 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2539 | in6_ifa_put(ifp); | |
2540 | } | |
2541 | } | |
2542 | ||
07a93626 | 2543 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 LT |
2544 | static void sit_add_v4_addrs(struct inet6_dev *idev) |
2545 | { | |
1da177e4 LT |
2546 | struct in6_addr addr; |
2547 | struct net_device *dev; | |
c346dca1 | 2548 | struct net *net = dev_net(idev->dev); |
929c9cf3 | 2549 | int scope, plen; |
f0e2acfa | 2550 | u32 pflags = 0; |
1da177e4 LT |
2551 | |
2552 | ASSERT_RTNL(); | |
2553 | ||
2554 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2555 | memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); | |
2556 | ||
2557 | if (idev->dev->flags&IFF_POINTOPOINT) { | |
2558 | addr.s6_addr32[0] = htonl(0xfe800000); | |
2559 | scope = IFA_LINK; | |
929c9cf3 | 2560 | plen = 64; |
1da177e4 LT |
2561 | } else { |
2562 | scope = IPV6_ADDR_COMPATv4; | |
929c9cf3 | 2563 | plen = 96; |
f0e2acfa | 2564 | pflags |= RTF_NONEXTHOP; |
1da177e4 LT |
2565 | } |
2566 | ||
2567 | if (addr.s6_addr32[3]) { | |
929c9cf3 | 2568 | add_addr(idev, &addr, plen, scope); |
f0e2acfa | 2569 | addrconf_prefix_route(&addr, plen, idev->dev, 0, pflags); |
1da177e4 LT |
2570 | return; |
2571 | } | |
2572 | ||
6fda7350 | 2573 | for_each_netdev(net, dev) { |
8e5e8f30 | 2574 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
1da177e4 | 2575 | if (in_dev && (dev->flags & IFF_UP)) { |
8e5e8f30 | 2576 | struct in_ifaddr *ifa; |
1da177e4 LT |
2577 | |
2578 | int flag = scope; | |
2579 | ||
2580 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { | |
1da177e4 LT |
2581 | |
2582 | addr.s6_addr32[3] = ifa->ifa_local; | |
2583 | ||
2584 | if (ifa->ifa_scope == RT_SCOPE_LINK) | |
2585 | continue; | |
2586 | if (ifa->ifa_scope >= RT_SCOPE_HOST) { | |
2587 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2588 | continue; | |
2589 | flag |= IFA_HOST; | |
2590 | } | |
1da177e4 | 2591 | |
b5f348e5 | 2592 | add_addr(idev, &addr, plen, flag); |
f0e2acfa ND |
2593 | addrconf_prefix_route(&addr, plen, idev->dev, 0, |
2594 | pflags); | |
1da177e4 LT |
2595 | } |
2596 | } | |
1ab1457c | 2597 | } |
1da177e4 | 2598 | } |
0be669bb | 2599 | #endif |
1da177e4 LT |
2600 | |
2601 | static void init_loopback(struct net_device *dev) | |
2602 | { | |
2603 | struct inet6_dev *idev; | |
25fb6ca4 BK |
2604 | struct net_device *sp_dev; |
2605 | struct inet6_ifaddr *sp_ifa; | |
2606 | struct rt6_info *sp_rt; | |
1da177e4 LT |
2607 | |
2608 | /* ::1 */ | |
2609 | ||
2610 | ASSERT_RTNL(); | |
2611 | ||
7eaa48a4 | 2612 | if ((idev = ipv6_find_idev(dev)) == NULL) { |
91df42be | 2613 | pr_debug("%s: add_dev failed\n", __func__); |
1da177e4 LT |
2614 | return; |
2615 | } | |
2616 | ||
b5f348e5 | 2617 | add_addr(idev, &in6addr_loopback, 128, IFA_HOST); |
25fb6ca4 BK |
2618 | |
2619 | /* Add routes to other interface's IPv6 addresses */ | |
2620 | for_each_netdev(dev_net(dev), sp_dev) { | |
2621 | if (!strcmp(sp_dev->name, dev->name)) | |
2622 | continue; | |
2623 | ||
2624 | idev = __in6_dev_get(sp_dev); | |
2625 | if (!idev) | |
2626 | continue; | |
2627 | ||
2628 | read_lock_bh(&idev->lock); | |
2629 | list_for_each_entry(sp_ifa, &idev->addr_list, if_list) { | |
2630 | ||
2631 | if (sp_ifa->flags & (IFA_F_DADFAILED | IFA_F_TENTATIVE)) | |
2632 | continue; | |
2633 | ||
a881ae1f G |
2634 | if (sp_ifa->rt) |
2635 | continue; | |
2636 | ||
57ec0afe | 2637 | sp_rt = addrconf_dst_alloc(idev, &sp_ifa->addr, false); |
25fb6ca4 BK |
2638 | |
2639 | /* Failure cases are ignored */ | |
534c8779 G |
2640 | if (!IS_ERR(sp_rt)) { |
2641 | sp_ifa->rt = sp_rt; | |
25fb6ca4 | 2642 | ip6_ins_rt(sp_rt); |
534c8779 | 2643 | } |
25fb6ca4 BK |
2644 | } |
2645 | read_unlock_bh(&idev->lock); | |
2646 | } | |
1da177e4 LT |
2647 | } |
2648 | ||
b71d1d42 | 2649 | static void addrconf_add_linklocal(struct inet6_dev *idev, const struct in6_addr *addr) |
1da177e4 | 2650 | { |
8e5e8f30 | 2651 | struct inet6_ifaddr *ifp; |
95c385b4 NH |
2652 | u32 addr_flags = IFA_F_PERMANENT; |
2653 | ||
2654 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
2655 | if (idev->cnf.optimistic_dad && | |
702beb87 | 2656 | !dev_net(idev->dev)->ipv6.devconf_all->forwarding) |
95c385b4 NH |
2657 | addr_flags |= IFA_F_OPTIMISTIC; |
2658 | #endif | |
1da177e4 | 2659 | |
95c385b4 | 2660 | |
07edd741 HFS |
2661 | ifp = ipv6_add_addr(idev, addr, NULL, 64, IFA_LINK, addr_flags, |
2662 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); | |
1da177e4 | 2663 | if (!IS_ERR(ifp)) { |
46d48046 | 2664 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0); |
cf22f9a2 | 2665 | addrconf_dad_start(ifp); |
1da177e4 LT |
2666 | in6_ifa_put(ifp); |
2667 | } | |
2668 | } | |
2669 | ||
2670 | static void addrconf_dev_config(struct net_device *dev) | |
2671 | { | |
2672 | struct in6_addr addr; | |
8e5e8f30 | 2673 | struct inet6_dev *idev; |
1da177e4 LT |
2674 | |
2675 | ASSERT_RTNL(); | |
2676 | ||
74235a25 HX |
2677 | if ((dev->type != ARPHRD_ETHER) && |
2678 | (dev->type != ARPHRD_FDDI) && | |
74235a25 | 2679 | (dev->type != ARPHRD_ARCNET) && |
06a4c1c5 | 2680 | (dev->type != ARPHRD_INFINIBAND) && |
cb6bf355 | 2681 | (dev->type != ARPHRD_IEEE802154) && |
e837735e | 2682 | (dev->type != ARPHRD_IEEE1394) && |
e74bccb8 JR |
2683 | (dev->type != ARPHRD_TUNNEL6) && |
2684 | (dev->type != ARPHRD_6LOWPAN)) { | |
74235a25 HX |
2685 | /* Alas, we support only Ethernet autoconfiguration. */ |
2686 | return; | |
2687 | } | |
2688 | ||
1da177e4 | 2689 | idev = addrconf_add_dev(dev); |
64e724f6 | 2690 | if (IS_ERR(idev)) |
1da177e4 LT |
2691 | return; |
2692 | ||
2693 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2694 | addr.s6_addr32[0] = htonl(0xFE800000); | |
2695 | ||
2696 | if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0) | |
2697 | addrconf_add_linklocal(idev, &addr); | |
2698 | } | |
2699 | ||
07a93626 | 2700 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 LT |
2701 | static void addrconf_sit_config(struct net_device *dev) |
2702 | { | |
2703 | struct inet6_dev *idev; | |
2704 | ||
2705 | ASSERT_RTNL(); | |
2706 | ||
1ab1457c YH |
2707 | /* |
2708 | * Configure the tunnel with one of our IPv4 | |
2709 | * addresses... we should configure all of | |
1da177e4 LT |
2710 | * our v4 addrs in the tunnel |
2711 | */ | |
2712 | ||
7eaa48a4 | 2713 | if ((idev = ipv6_find_idev(dev)) == NULL) { |
91df42be | 2714 | pr_debug("%s: add_dev failed\n", __func__); |
1da177e4 LT |
2715 | return; |
2716 | } | |
2717 | ||
c7dc89c0 FT |
2718 | if (dev->priv_flags & IFF_ISATAP) { |
2719 | struct in6_addr addr; | |
2720 | ||
2721 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
c7dc89c0 FT |
2722 | if (!ipv6_generate_eui64(addr.s6_addr + 8, dev)) |
2723 | addrconf_add_linklocal(idev, &addr); | |
2724 | return; | |
2725 | } | |
2726 | ||
1da177e4 LT |
2727 | sit_add_v4_addrs(idev); |
2728 | ||
62b54dd9 | 2729 | if (dev->flags&IFF_POINTOPOINT) |
1da177e4 | 2730 | addrconf_add_mroute(dev); |
1da177e4 | 2731 | } |
0be669bb | 2732 | #endif |
1da177e4 | 2733 | |
07a93626 | 2734 | #if IS_ENABLED(CONFIG_NET_IPGRE) |
aee80b54 | 2735 | static void addrconf_gre_config(struct net_device *dev) |
2736 | { | |
2737 | struct inet6_dev *idev; | |
2738 | struct in6_addr addr; | |
2739 | ||
aee80b54 | 2740 | ASSERT_RTNL(); |
2741 | ||
7eaa48a4 | 2742 | if ((idev = ipv6_find_idev(dev)) == NULL) { |
91df42be | 2743 | pr_debug("%s: add_dev failed\n", __func__); |
aee80b54 | 2744 | return; |
2745 | } | |
2746 | ||
2747 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
aee80b54 | 2748 | if (!ipv6_generate_eui64(addr.s6_addr + 8, dev)) |
2749 | addrconf_add_linklocal(idev, &addr); | |
2750 | } | |
2751 | #endif | |
2752 | ||
1da177e4 LT |
2753 | static inline int |
2754 | ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev) | |
2755 | { | |
2756 | struct in6_addr lladdr; | |
2757 | ||
95c385b4 | 2758 | if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) { |
1da177e4 LT |
2759 | addrconf_add_linklocal(idev, &lladdr); |
2760 | return 0; | |
2761 | } | |
2762 | return -1; | |
2763 | } | |
2764 | ||
1ab1457c | 2765 | static int addrconf_notify(struct notifier_block *this, unsigned long event, |
351638e7 | 2766 | void *ptr) |
1da177e4 | 2767 | { |
351638e7 | 2768 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
748e2d93 | 2769 | struct inet6_dev *idev = __in6_dev_get(dev); |
c5e33bdd | 2770 | int run_pending = 0; |
b217d616 | 2771 | int err; |
1da177e4 | 2772 | |
e21e8467 | 2773 | switch (event) { |
45ba9dd2 | 2774 | case NETDEV_REGISTER: |
74235a25 | 2775 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
45ba9dd2 YH |
2776 | idev = ipv6_add_dev(dev); |
2777 | if (!idev) | |
b217d616 | 2778 | return notifier_from_errno(-ENOMEM); |
45ba9dd2 YH |
2779 | } |
2780 | break; | |
bcdd553f | 2781 | |
1da177e4 | 2782 | case NETDEV_UP: |
3c21edbd | 2783 | case NETDEV_CHANGE: |
c2edacf8 JV |
2784 | if (dev->flags & IFF_SLAVE) |
2785 | break; | |
2786 | ||
3c21edbd | 2787 | if (event == NETDEV_UP) { |
f24e3d65 | 2788 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd | 2789 | /* device is not ready yet. */ |
f3213831 | 2790 | pr_info("ADDRCONF(NETDEV_UP): %s: link is not ready\n", |
3c21edbd YH |
2791 | dev->name); |
2792 | break; | |
2793 | } | |
99081049 | 2794 | |
d31c7b8f EP |
2795 | if (!idev && dev->mtu >= IPV6_MIN_MTU) |
2796 | idev = ipv6_add_dev(dev); | |
2797 | ||
e3ec6cfc | 2798 | if (idev) { |
99081049 | 2799 | idev->if_flags |= IF_READY; |
e3ec6cfc BT |
2800 | run_pending = 1; |
2801 | } | |
3c21edbd | 2802 | } else { |
f24e3d65 | 2803 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd YH |
2804 | /* device is still not ready. */ |
2805 | break; | |
2806 | } | |
2807 | ||
2808 | if (idev) { | |
bcdd553f | 2809 | if (idev->if_flags & IF_READY) |
3c21edbd YH |
2810 | /* device is already configured. */ |
2811 | break; | |
3c21edbd YH |
2812 | idev->if_flags |= IF_READY; |
2813 | } | |
2814 | ||
f3213831 JP |
2815 | pr_info("ADDRCONF(NETDEV_CHANGE): %s: link becomes ready\n", |
2816 | dev->name); | |
3c21edbd | 2817 | |
c5e33bdd | 2818 | run_pending = 1; |
3c21edbd YH |
2819 | } |
2820 | ||
e21e8467 | 2821 | switch (dev->type) { |
07a93626 | 2822 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 LT |
2823 | case ARPHRD_SIT: |
2824 | addrconf_sit_config(dev); | |
2825 | break; | |
aee80b54 | 2826 | #endif |
07a93626 | 2827 | #if IS_ENABLED(CONFIG_NET_IPGRE) |
aee80b54 | 2828 | case ARPHRD_IPGRE: |
2829 | addrconf_gre_config(dev); | |
2830 | break; | |
0be669bb | 2831 | #endif |
1da177e4 LT |
2832 | case ARPHRD_LOOPBACK: |
2833 | init_loopback(dev); | |
2834 | break; | |
2835 | ||
2836 | default: | |
2837 | addrconf_dev_config(dev); | |
2838 | break; | |
3ff50b79 | 2839 | } |
bcdd553f | 2840 | |
1da177e4 | 2841 | if (idev) { |
c5e33bdd YH |
2842 | if (run_pending) |
2843 | addrconf_dad_run(idev); | |
2844 | ||
bcdd553f SH |
2845 | /* |
2846 | * If the MTU changed during the interface down, | |
2847 | * when the interface up, the changed MTU must be | |
2848 | * reflected in the idev as well as routers. | |
1da177e4 | 2849 | */ |
bcdd553f SH |
2850 | if (idev->cnf.mtu6 != dev->mtu && |
2851 | dev->mtu >= IPV6_MIN_MTU) { | |
1da177e4 LT |
2852 | rt6_mtu_change(dev, dev->mtu); |
2853 | idev->cnf.mtu6 = dev->mtu; | |
2854 | } | |
2855 | idev->tstamp = jiffies; | |
2856 | inet6_ifinfo_notify(RTM_NEWLINK, idev); | |
bcdd553f SH |
2857 | |
2858 | /* | |
2859 | * If the changed mtu during down is lower than | |
2860 | * IPV6_MIN_MTU stop IPv6 on this interface. | |
1da177e4 LT |
2861 | */ |
2862 | if (dev->mtu < IPV6_MIN_MTU) | |
bcdd553f | 2863 | addrconf_ifdown(dev, 1); |
1da177e4 LT |
2864 | } |
2865 | break; | |
2866 | ||
2867 | case NETDEV_CHANGEMTU: | |
d31c7b8f | 2868 | if (idev && dev->mtu >= IPV6_MIN_MTU) { |
1da177e4 LT |
2869 | rt6_mtu_change(dev, dev->mtu); |
2870 | idev->cnf.mtu6 = dev->mtu; | |
2871 | break; | |
2872 | } | |
2873 | ||
d31c7b8f EP |
2874 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
2875 | idev = ipv6_add_dev(dev); | |
2876 | if (idev) | |
2877 | break; | |
2878 | } | |
2879 | ||
bcdd553f SH |
2880 | /* |
2881 | * MTU falled under IPV6_MIN_MTU. | |
2882 | * Stop IPv6 on this interface. | |
2883 | */ | |
1da177e4 LT |
2884 | |
2885 | case NETDEV_DOWN: | |
2886 | case NETDEV_UNREGISTER: | |
2887 | /* | |
2888 | * Remove all addresses from this interface. | |
2889 | */ | |
2890 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
2891 | break; | |
3c21edbd | 2892 | |
1da177e4 | 2893 | case NETDEV_CHANGENAME: |
1da177e4 | 2894 | if (idev) { |
5632c515 | 2895 | snmp6_unregister_dev(idev); |
408c4768 | 2896 | addrconf_sysctl_unregister(idev); |
f52295a9 | 2897 | addrconf_sysctl_register(idev); |
b217d616 HX |
2898 | err = snmp6_register_dev(idev); |
2899 | if (err) | |
2900 | return notifier_from_errno(err); | |
5632c515 | 2901 | } |
1da177e4 | 2902 | break; |
bcdd553f | 2903 | |
93d9b7d7 JP |
2904 | case NETDEV_PRE_TYPE_CHANGE: |
2905 | case NETDEV_POST_TYPE_CHANGE: | |
2906 | addrconf_type_change(dev, event); | |
75c78500 | 2907 | break; |
3ff50b79 | 2908 | } |
1da177e4 LT |
2909 | |
2910 | return NOTIFY_OK; | |
2911 | } | |
2912 | ||
2913 | /* | |
2914 | * addrconf module should be notified of a device going up | |
2915 | */ | |
2916 | static struct notifier_block ipv6_dev_notf = { | |
2917 | .notifier_call = addrconf_notify, | |
1da177e4 LT |
2918 | }; |
2919 | ||
93d9b7d7 | 2920 | static void addrconf_type_change(struct net_device *dev, unsigned long event) |
75c78500 MS |
2921 | { |
2922 | struct inet6_dev *idev; | |
2923 | ASSERT_RTNL(); | |
2924 | ||
2925 | idev = __in6_dev_get(dev); | |
2926 | ||
93d9b7d7 | 2927 | if (event == NETDEV_POST_TYPE_CHANGE) |
75c78500 | 2928 | ipv6_mc_remap(idev); |
93d9b7d7 | 2929 | else if (event == NETDEV_PRE_TYPE_CHANGE) |
75c78500 MS |
2930 | ipv6_mc_unmap(idev); |
2931 | } | |
2932 | ||
1da177e4 LT |
2933 | static int addrconf_ifdown(struct net_device *dev, int how) |
2934 | { | |
c346dca1 | 2935 | struct net *net = dev_net(dev); |
502a2ffd | 2936 | struct inet6_dev *idev; |
2937 | struct inet6_ifaddr *ifa; | |
73a8bd74 | 2938 | int state, i; |
1da177e4 LT |
2939 | |
2940 | ASSERT_RTNL(); | |
2941 | ||
73a8bd74 DM |
2942 | rt6_ifdown(net, dev); |
2943 | neigh_ifdown(&nd_tbl, dev); | |
1da177e4 LT |
2944 | |
2945 | idev = __in6_dev_get(dev); | |
2946 | if (idev == NULL) | |
2947 | return -ENODEV; | |
2948 | ||
bcdd553f SH |
2949 | /* |
2950 | * Step 1: remove reference to ipv6 device from parent device. | |
2951 | * Do not dev_put! | |
1da177e4 | 2952 | */ |
439e2385 | 2953 | if (how) { |
1da177e4 | 2954 | idev->dead = 1; |
8814c4b5 YH |
2955 | |
2956 | /* protected by rtnl_lock */ | |
a9b3cd7f | 2957 | RCU_INIT_POINTER(dev->ip6_ptr, NULL); |
1da177e4 LT |
2958 | |
2959 | /* Step 1.5: remove snmp6 entry */ | |
2960 | snmp6_unregister_dev(idev); | |
2961 | ||
2962 | } | |
2963 | ||
73a8bd74 DM |
2964 | /* Step 2: clear hash table */ |
2965 | for (i = 0; i < IN6_ADDR_HSIZE; i++) { | |
2966 | struct hlist_head *h = &inet6_addr_lst[i]; | |
73a8bd74 DM |
2967 | |
2968 | spin_lock_bh(&addrconf_hash_lock); | |
2969 | restart: | |
b67bfe0d | 2970 | hlist_for_each_entry_rcu(ifa, h, addr_lst) { |
73a8bd74 DM |
2971 | if (ifa->idev == idev) { |
2972 | hlist_del_init_rcu(&ifa->addr_lst); | |
b7b1bfce | 2973 | addrconf_del_dad_timer(ifa); |
73a8bd74 DM |
2974 | goto restart; |
2975 | } | |
2976 | } | |
2977 | spin_unlock_bh(&addrconf_hash_lock); | |
2978 | } | |
2979 | ||
1da177e4 LT |
2980 | write_lock_bh(&idev->lock); |
2981 | ||
b7b1bfce HFS |
2982 | addrconf_del_rs_timer(idev); |
2983 | ||
bcdd553f | 2984 | /* Step 2: clear flags for stateless addrconf */ |
439e2385 | 2985 | if (!how) |
3c21edbd | 2986 | idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); |
1da177e4 | 2987 | |
439e2385 | 2988 | if (how && del_timer(&idev->regen_timer)) |
1da177e4 LT |
2989 | in6_dev_put(idev); |
2990 | ||
bcdd553f | 2991 | /* Step 3: clear tempaddr list */ |
372e6c8f | 2992 | while (!list_empty(&idev->tempaddr_list)) { |
2993 | ifa = list_first_entry(&idev->tempaddr_list, | |
2994 | struct inet6_ifaddr, tmp_list); | |
2995 | list_del(&ifa->tmp_list); | |
1da177e4 LT |
2996 | write_unlock_bh(&idev->lock); |
2997 | spin_lock_bh(&ifa->lock); | |
2998 | ||
2999 | if (ifa->ifpub) { | |
3000 | in6_ifa_put(ifa->ifpub); | |
3001 | ifa->ifpub = NULL; | |
3002 | } | |
3003 | spin_unlock_bh(&ifa->lock); | |
3004 | in6_ifa_put(ifa); | |
3005 | write_lock_bh(&idev->lock); | |
3006 | } | |
8f37ada5 | 3007 | |
502a2ffd | 3008 | while (!list_empty(&idev->addr_list)) { |
3009 | ifa = list_first_entry(&idev->addr_list, | |
3010 | struct inet6_ifaddr, if_list); | |
b7b1bfce | 3011 | addrconf_del_dad_timer(ifa); |
84e8b803 | 3012 | |
73a8bd74 | 3013 | list_del(&ifa->if_list); |
84e8b803 | 3014 | |
73a8bd74 | 3015 | write_unlock_bh(&idev->lock); |
84e8b803 | 3016 | |
73a8bd74 DM |
3017 | spin_lock_bh(&ifa->state_lock); |
3018 | state = ifa->state; | |
3019 | ifa->state = INET6_IFADDR_STATE_DEAD; | |
3020 | spin_unlock_bh(&ifa->state_lock); | |
9d82ca98 | 3021 | |
73a8bd74 DM |
3022 | if (state != INET6_IFADDR_STATE_DEAD) { |
3023 | __ipv6_ifa_notify(RTM_DELADDR, ifa); | |
f88c91dd | 3024 | inet6addr_notifier_call_chain(NETDEV_DOWN, ifa); |
27bdb2ab | 3025 | } |
73a8bd74 | 3026 | in6_ifa_put(ifa); |
8f37ada5 | 3027 | |
73a8bd74 DM |
3028 | write_lock_bh(&idev->lock); |
3029 | } | |
8f37ada5 | 3030 | |
1da177e4 LT |
3031 | write_unlock_bh(&idev->lock); |
3032 | ||
3033 | /* Step 5: Discard multicast list */ | |
439e2385 | 3034 | if (how) |
1da177e4 LT |
3035 | ipv6_mc_destroy_dev(idev); |
3036 | else | |
3037 | ipv6_mc_down(idev); | |
3038 | ||
1da177e4 | 3039 | idev->tstamp = jiffies; |
1ab1457c | 3040 | |
bcdd553f | 3041 | /* Last: Shot the device (if unregistered) */ |
439e2385 | 3042 | if (how) { |
408c4768 | 3043 | addrconf_sysctl_unregister(idev); |
1da177e4 LT |
3044 | neigh_parms_release(&nd_tbl, idev->nd_parms); |
3045 | neigh_ifdown(&nd_tbl, dev); | |
3046 | in6_dev_put(idev); | |
3047 | } | |
3048 | return 0; | |
3049 | } | |
3050 | ||
3051 | static void addrconf_rs_timer(unsigned long data) | |
3052 | { | |
b7b1bfce | 3053 | struct inet6_dev *idev = (struct inet6_dev *)data; |
caf92bc4 | 3054 | struct net_device *dev = idev->dev; |
b7b1bfce | 3055 | struct in6_addr lladdr; |
1da177e4 | 3056 | |
b7b1bfce | 3057 | write_lock(&idev->lock); |
5b2a1953 | 3058 | if (idev->dead || !(idev->if_flags & IF_READY)) |
1da177e4 LT |
3059 | goto out; |
3060 | ||
9ba2add3 | 3061 | if (!ipv6_accept_ra(idev)) |
5b2a1953 | 3062 | goto out; |
3063 | ||
3064 | /* Announcement received after solicitation was sent */ | |
3065 | if (idev->if_flags & IF_RA_RCVD) | |
1da177e4 | 3066 | goto out; |
1da177e4 | 3067 | |
b7b1bfce | 3068 | if (idev->rs_probes++ < idev->cnf.rtr_solicits) { |
caf92bc4 CW |
3069 | write_unlock(&idev->lock); |
3070 | if (!ipv6_get_lladdr(dev, &lladdr, IFA_F_TENTATIVE)) | |
3071 | ndisc_send_rs(dev, &lladdr, | |
b7b1bfce HFS |
3072 | &in6addr_linklocal_allrouters); |
3073 | else | |
caf92bc4 | 3074 | goto put; |
1da177e4 | 3075 | |
caf92bc4 | 3076 | write_lock(&idev->lock); |
b7b1bfce HFS |
3077 | /* The wait after the last probe can be shorter */ |
3078 | addrconf_mod_rs_timer(idev, (idev->rs_probes == | |
3079 | idev->cnf.rtr_solicits) ? | |
3080 | idev->cnf.rtr_solicit_delay : | |
3081 | idev->cnf.rtr_solicit_interval); | |
1da177e4 | 3082 | } else { |
1da177e4 LT |
3083 | /* |
3084 | * Note: we do not support deprecated "all on-link" | |
3085 | * assumption any longer. | |
3086 | */ | |
91df42be | 3087 | pr_debug("%s: no IPv6 routers present\n", idev->dev->name); |
1da177e4 LT |
3088 | } |
3089 | ||
3090 | out: | |
b7b1bfce | 3091 | write_unlock(&idev->lock); |
caf92bc4 | 3092 | put: |
b7b1bfce | 3093 | in6_dev_put(idev); |
1da177e4 LT |
3094 | } |
3095 | ||
3096 | /* | |
3097 | * Duplicate Address Detection | |
3098 | */ | |
3c21edbd YH |
3099 | static void addrconf_dad_kick(struct inet6_ifaddr *ifp) |
3100 | { | |
3101 | unsigned long rand_num; | |
3102 | struct inet6_dev *idev = ifp->idev; | |
3103 | ||
95c385b4 NH |
3104 | if (ifp->flags & IFA_F_OPTIMISTIC) |
3105 | rand_num = 0; | |
3106 | else | |
63862b5b | 3107 | rand_num = prandom_u32() % (idev->cnf.rtr_solicit_delay ? : 1); |
95c385b4 | 3108 | |
b7b1bfce HFS |
3109 | ifp->dad_probes = idev->cnf.dad_transmits; |
3110 | addrconf_mod_dad_timer(ifp, rand_num); | |
3c21edbd YH |
3111 | } |
3112 | ||
cf22f9a2 | 3113 | static void addrconf_dad_start(struct inet6_ifaddr *ifp) |
1da177e4 LT |
3114 | { |
3115 | struct inet6_dev *idev = ifp->idev; | |
3116 | struct net_device *dev = idev->dev; | |
1da177e4 LT |
3117 | |
3118 | addrconf_join_solict(dev, &ifp->addr); | |
3119 | ||
63862b5b | 3120 | prandom_seed((__force u32) ifp->addr.s6_addr32[3]); |
1da177e4 LT |
3121 | |
3122 | read_lock_bh(&idev->lock); | |
622ccdf1 | 3123 | spin_lock(&ifp->lock); |
e9d3e084 | 3124 | if (ifp->state == INET6_IFADDR_STATE_DEAD) |
1da177e4 | 3125 | goto out; |
1da177e4 LT |
3126 | |
3127 | if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || | |
1b34be74 | 3128 | idev->cnf.accept_dad < 1 || |
55ebaef1 NT |
3129 | !(ifp->flags&IFA_F_TENTATIVE) || |
3130 | ifp->flags & IFA_F_NODAD) { | |
cc411d0b | 3131 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
21809faf | 3132 | spin_unlock(&ifp->lock); |
1da177e4 LT |
3133 | read_unlock_bh(&idev->lock); |
3134 | ||
3135 | addrconf_dad_completed(ifp); | |
3136 | return; | |
3137 | } | |
3138 | ||
6732bade | 3139 | if (!(idev->if_flags & IF_READY)) { |
21809faf | 3140 | spin_unlock(&ifp->lock); |
6732bade | 3141 | read_unlock_bh(&idev->lock); |
3c21edbd | 3142 | /* |
590a9887 | 3143 | * If the device is not ready: |
3c21edbd YH |
3144 | * - keep it tentative if it is a permanent address. |
3145 | * - otherwise, kill it. | |
3146 | */ | |
3147 | in6_ifa_hold(ifp); | |
cc411d0b | 3148 | addrconf_dad_stop(ifp, 0); |
6732bade | 3149 | return; |
3c21edbd | 3150 | } |
95c385b4 NH |
3151 | |
3152 | /* | |
3153 | * Optimistic nodes can start receiving | |
3154 | * Frames right away | |
3155 | */ | |
e21e8467 | 3156 | if (ifp->flags & IFA_F_OPTIMISTIC) |
95c385b4 NH |
3157 | ip6_ins_rt(ifp->rt); |
3158 | ||
6732bade | 3159 | addrconf_dad_kick(ifp); |
1da177e4 | 3160 | out: |
622ccdf1 | 3161 | spin_unlock(&ifp->lock); |
1da177e4 LT |
3162 | read_unlock_bh(&idev->lock); |
3163 | } | |
3164 | ||
3165 | static void addrconf_dad_timer(unsigned long data) | |
3166 | { | |
3167 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data; | |
3168 | struct inet6_dev *idev = ifp->idev; | |
1da177e4 LT |
3169 | struct in6_addr mcaddr; |
3170 | ||
b7b1bfce | 3171 | if (!ifp->dad_probes && addrconf_dad_end(ifp)) |
f2344a13 HX |
3172 | goto out; |
3173 | ||
b7b1bfce | 3174 | write_lock(&idev->lock); |
122e4519 | 3175 | if (idev->dead || !(idev->if_flags & IF_READY)) { |
b7b1bfce | 3176 | write_unlock(&idev->lock); |
1da177e4 LT |
3177 | goto out; |
3178 | } | |
21809faf | 3179 | |
3180 | spin_lock(&ifp->lock); | |
622ccdf1 HX |
3181 | if (ifp->state == INET6_IFADDR_STATE_DEAD) { |
3182 | spin_unlock(&ifp->lock); | |
b7b1bfce | 3183 | write_unlock(&idev->lock); |
622ccdf1 HX |
3184 | goto out; |
3185 | } | |
3186 | ||
b7b1bfce | 3187 | if (ifp->dad_probes == 0) { |
1da177e4 LT |
3188 | /* |
3189 | * DAD was successful | |
3190 | */ | |
3191 | ||
cc411d0b | 3192 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
21809faf | 3193 | spin_unlock(&ifp->lock); |
b7b1bfce | 3194 | write_unlock(&idev->lock); |
1da177e4 LT |
3195 | |
3196 | addrconf_dad_completed(ifp); | |
3197 | ||
3198 | goto out; | |
3199 | } | |
3200 | ||
b7b1bfce | 3201 | ifp->dad_probes--; |
1f9248e5 JP |
3202 | addrconf_mod_dad_timer(ifp, |
3203 | NEIGH_VAR(ifp->idev->nd_parms, RETRANS_TIME)); | |
21809faf | 3204 | spin_unlock(&ifp->lock); |
b7b1bfce | 3205 | write_unlock(&idev->lock); |
1da177e4 LT |
3206 | |
3207 | /* send a neighbour solicitation for our addr */ | |
1da177e4 | 3208 | addrconf_addr_solict_mult(&ifp->addr, &mcaddr); |
d7aabf22 | 3209 | ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any); |
1da177e4 LT |
3210 | out: |
3211 | in6_ifa_put(ifp); | |
3212 | } | |
3213 | ||
3214 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp) | |
3215 | { | |
e21e8467 | 3216 | struct net_device *dev = ifp->idev->dev; |
b7b1bfce | 3217 | struct in6_addr lladdr; |
b173ee48 | 3218 | bool send_rs, send_mld; |
b7b1bfce HFS |
3219 | |
3220 | addrconf_del_dad_timer(ifp); | |
1da177e4 LT |
3221 | |
3222 | /* | |
3223 | * Configure the address for reception. Now it is valid. | |
3224 | */ | |
3225 | ||
3226 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
3227 | ||
026359bc TA |
3228 | /* If added prefix is link local and we are prepared to process |
3229 | router advertisements, start sending router solicitations. | |
1da177e4 LT |
3230 | */ |
3231 | ||
1ec047eb HFS |
3232 | read_lock_bh(&ifp->idev->lock); |
3233 | spin_lock(&ifp->lock); | |
b173ee48 HFS |
3234 | send_mld = ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL && |
3235 | ifp->idev->valid_ll_addr_cnt == 1; | |
3236 | send_rs = send_mld && | |
3237 | ipv6_accept_ra(ifp->idev) && | |
1ec047eb | 3238 | ifp->idev->cnf.rtr_solicits > 0 && |
b173ee48 | 3239 | (dev->flags&IFF_LOOPBACK) == 0; |
1ec047eb HFS |
3240 | spin_unlock(&ifp->lock); |
3241 | read_unlock_bh(&ifp->idev->lock); | |
3242 | ||
b173ee48 HFS |
3243 | /* While dad is in progress mld report's source address is in6_addrany. |
3244 | * Resend with proper ll now. | |
3245 | */ | |
3246 | if (send_mld) | |
3247 | ipv6_mc_dad_complete(ifp->idev); | |
3248 | ||
1ec047eb | 3249 | if (send_rs) { |
1da177e4 LT |
3250 | /* |
3251 | * If a host as already performed a random delay | |
3252 | * [...] as part of DAD [...] there is no need | |
3253 | * to delay again before sending the first RS | |
3254 | */ | |
1ec047eb | 3255 | if (ipv6_get_lladdr(dev, &lladdr, IFA_F_TENTATIVE)) |
b7b1bfce | 3256 | return; |
1ec047eb | 3257 | ndisc_send_rs(dev, &lladdr, &in6addr_linklocal_allrouters); |
1da177e4 | 3258 | |
b7b1bfce HFS |
3259 | write_lock_bh(&ifp->idev->lock); |
3260 | spin_lock(&ifp->lock); | |
3261 | ifp->idev->rs_probes = 1; | |
1da177e4 | 3262 | ifp->idev->if_flags |= IF_RS_SENT; |
b7b1bfce HFS |
3263 | addrconf_mod_rs_timer(ifp->idev, |
3264 | ifp->idev->cnf.rtr_solicit_interval); | |
3265 | spin_unlock(&ifp->lock); | |
3266 | write_unlock_bh(&ifp->idev->lock); | |
1da177e4 LT |
3267 | } |
3268 | } | |
3269 | ||
e21e8467 SH |
3270 | static void addrconf_dad_run(struct inet6_dev *idev) |
3271 | { | |
c5e33bdd YH |
3272 | struct inet6_ifaddr *ifp; |
3273 | ||
3274 | read_lock_bh(&idev->lock); | |
502a2ffd | 3275 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
21809faf | 3276 | spin_lock(&ifp->lock); |
f2344a13 HX |
3277 | if (ifp->flags & IFA_F_TENTATIVE && |
3278 | ifp->state == INET6_IFADDR_STATE_DAD) | |
3279 | addrconf_dad_kick(ifp); | |
21809faf | 3280 | spin_unlock(&ifp->lock); |
c5e33bdd YH |
3281 | } |
3282 | read_unlock_bh(&idev->lock); | |
3283 | } | |
3284 | ||
1da177e4 LT |
3285 | #ifdef CONFIG_PROC_FS |
3286 | struct if6_iter_state { | |
3c40090a | 3287 | struct seq_net_private p; |
1da177e4 | 3288 | int bucket; |
1d578303 | 3289 | int offset; |
1da177e4 LT |
3290 | }; |
3291 | ||
1d578303 | 3292 | static struct inet6_ifaddr *if6_get_first(struct seq_file *seq, loff_t pos) |
1da177e4 LT |
3293 | { |
3294 | struct inet6_ifaddr *ifa = NULL; | |
3295 | struct if6_iter_state *state = seq->private; | |
1218854a | 3296 | struct net *net = seq_file_net(seq); |
1d578303 | 3297 | int p = 0; |
1da177e4 | 3298 | |
1d578303 MM |
3299 | /* initial bucket if pos is 0 */ |
3300 | if (pos == 0) { | |
3301 | state->bucket = 0; | |
3302 | state->offset = 0; | |
3303 | } | |
3304 | ||
3305 | for (; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { | |
b67bfe0d | 3306 | hlist_for_each_entry_rcu_bh(ifa, &inet6_addr_lst[state->bucket], |
1d578303 | 3307 | addr_lst) { |
9f0d3c27 ED |
3308 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
3309 | continue; | |
1d578303 MM |
3310 | /* sync with offset */ |
3311 | if (p < state->offset) { | |
3312 | p++; | |
3313 | continue; | |
3314 | } | |
3315 | state->offset++; | |
9f0d3c27 | 3316 | return ifa; |
1d578303 MM |
3317 | } |
3318 | ||
3319 | /* prepare for next bucket */ | |
3320 | state->offset = 0; | |
3321 | p = 0; | |
1da177e4 | 3322 | } |
c2e21293 | 3323 | return NULL; |
1da177e4 LT |
3324 | } |
3325 | ||
c2e21293 | 3326 | static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, |
3327 | struct inet6_ifaddr *ifa) | |
1da177e4 LT |
3328 | { |
3329 | struct if6_iter_state *state = seq->private; | |
1218854a | 3330 | struct net *net = seq_file_net(seq); |
1da177e4 | 3331 | |
b67bfe0d | 3332 | hlist_for_each_entry_continue_rcu_bh(ifa, addr_lst) { |
9f0d3c27 ED |
3333 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
3334 | continue; | |
1d578303 | 3335 | state->offset++; |
9f0d3c27 | 3336 | return ifa; |
1d578303 | 3337 | } |
3c40090a | 3338 | |
c2e21293 | 3339 | while (++state->bucket < IN6_ADDR_HSIZE) { |
1d578303 | 3340 | state->offset = 0; |
b67bfe0d | 3341 | hlist_for_each_entry_rcu_bh(ifa, |
c2e21293 | 3342 | &inet6_addr_lst[state->bucket], addr_lst) { |
9f0d3c27 ED |
3343 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
3344 | continue; | |
1d578303 | 3345 | state->offset++; |
9f0d3c27 | 3346 | return ifa; |
c2e21293 | 3347 | } |
1da177e4 | 3348 | } |
3c40090a | 3349 | |
c2e21293 | 3350 | return NULL; |
1da177e4 LT |
3351 | } |
3352 | ||
1da177e4 | 3353 | static void *if6_seq_start(struct seq_file *seq, loff_t *pos) |
4f70ecca | 3354 | __acquires(rcu_bh) |
1da177e4 | 3355 | { |
5c578aed | 3356 | rcu_read_lock_bh(); |
1d578303 | 3357 | return if6_get_first(seq, *pos); |
1da177e4 LT |
3358 | } |
3359 | ||
3360 | static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
3361 | { | |
3362 | struct inet6_ifaddr *ifa; | |
3363 | ||
3364 | ifa = if6_get_next(seq, v); | |
3365 | ++*pos; | |
3366 | return ifa; | |
3367 | } | |
3368 | ||
3369 | static void if6_seq_stop(struct seq_file *seq, void *v) | |
4f70ecca | 3370 | __releases(rcu_bh) |
1da177e4 | 3371 | { |
5c578aed | 3372 | rcu_read_unlock_bh(); |
1da177e4 LT |
3373 | } |
3374 | ||
3375 | static int if6_seq_show(struct seq_file *seq, void *v) | |
3376 | { | |
3377 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; | |
971a351c | 3378 | seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n", |
b071195d | 3379 | &ifp->addr, |
1da177e4 LT |
3380 | ifp->idev->dev->ifindex, |
3381 | ifp->prefix_len, | |
3382 | ifp->scope, | |
971a351c | 3383 | (u8) ifp->flags, |
1da177e4 LT |
3384 | ifp->idev->dev->name); |
3385 | return 0; | |
3386 | } | |
3387 | ||
56b3d975 | 3388 | static const struct seq_operations if6_seq_ops = { |
1da177e4 LT |
3389 | .start = if6_seq_start, |
3390 | .next = if6_seq_next, | |
3391 | .show = if6_seq_show, | |
3392 | .stop = if6_seq_stop, | |
3393 | }; | |
3394 | ||
3395 | static int if6_seq_open(struct inode *inode, struct file *file) | |
3396 | { | |
3c40090a DL |
3397 | return seq_open_net(inode, file, &if6_seq_ops, |
3398 | sizeof(struct if6_iter_state)); | |
1da177e4 LT |
3399 | } |
3400 | ||
9a32144e | 3401 | static const struct file_operations if6_fops = { |
1da177e4 LT |
3402 | .owner = THIS_MODULE, |
3403 | .open = if6_seq_open, | |
3404 | .read = seq_read, | |
3405 | .llseek = seq_lseek, | |
3c40090a | 3406 | .release = seq_release_net, |
1da177e4 LT |
3407 | }; |
3408 | ||
2c8c1e72 | 3409 | static int __net_init if6_proc_net_init(struct net *net) |
1da177e4 | 3410 | { |
d4beaa66 | 3411 | if (!proc_create("if_inet6", S_IRUGO, net->proc_net, &if6_fops)) |
1da177e4 LT |
3412 | return -ENOMEM; |
3413 | return 0; | |
3414 | } | |
3415 | ||
2c8c1e72 | 3416 | static void __net_exit if6_proc_net_exit(struct net *net) |
3c40090a | 3417 | { |
ece31ffd | 3418 | remove_proc_entry("if_inet6", net->proc_net); |
3c40090a DL |
3419 | } |
3420 | ||
3421 | static struct pernet_operations if6_proc_net_ops = { | |
3422 | .init = if6_proc_net_init, | |
3423 | .exit = if6_proc_net_exit, | |
3424 | }; | |
3425 | ||
3426 | int __init if6_proc_init(void) | |
3427 | { | |
3428 | return register_pernet_subsys(&if6_proc_net_ops); | |
3429 | } | |
3430 | ||
1da177e4 LT |
3431 | void if6_proc_exit(void) |
3432 | { | |
3c40090a | 3433 | unregister_pernet_subsys(&if6_proc_net_ops); |
1da177e4 LT |
3434 | } |
3435 | #endif /* CONFIG_PROC_FS */ | |
3436 | ||
07a93626 | 3437 | #if IS_ENABLED(CONFIG_IPV6_MIP6) |
3b9f9a1c | 3438 | /* Check if address is a home address configured on any interface. */ |
b71d1d42 | 3439 | int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr) |
3b9f9a1c NT |
3440 | { |
3441 | int ret = 0; | |
c2e21293 | 3442 | struct inet6_ifaddr *ifp = NULL; |
ddbe5032 | 3443 | unsigned int hash = inet6_addr_hash(addr); |
c2e21293 | 3444 | |
5c578aed | 3445 | rcu_read_lock_bh(); |
b67bfe0d | 3446 | hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 3447 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
389f6612 | 3448 | continue; |
caad295f | 3449 | if (ipv6_addr_equal(&ifp->addr, addr) && |
3b9f9a1c NT |
3450 | (ifp->flags & IFA_F_HOMEADDRESS)) { |
3451 | ret = 1; | |
3452 | break; | |
3453 | } | |
3454 | } | |
5c578aed | 3455 | rcu_read_unlock_bh(); |
3b9f9a1c NT |
3456 | return ret; |
3457 | } | |
3458 | #endif | |
3459 | ||
1da177e4 LT |
3460 | /* |
3461 | * Periodic address status verification | |
3462 | */ | |
3463 | ||
3464 | static void addrconf_verify(unsigned long foo) | |
3465 | { | |
b2db7564 | 3466 | unsigned long now, next, next_sec, next_sched; |
1da177e4 | 3467 | struct inet6_ifaddr *ifp; |
1da177e4 LT |
3468 | int i; |
3469 | ||
5c578aed | 3470 | rcu_read_lock_bh(); |
3471 | spin_lock(&addrconf_verify_lock); | |
1da177e4 | 3472 | now = jiffies; |
b2db7564 | 3473 | next = round_jiffies_up(now + ADDR_CHECK_FREQUENCY); |
1da177e4 LT |
3474 | |
3475 | del_timer(&addr_chk_timer); | |
3476 | ||
bcdd553f | 3477 | for (i = 0; i < IN6_ADDR_HSIZE; i++) { |
1da177e4 | 3478 | restart: |
b67bfe0d | 3479 | hlist_for_each_entry_rcu_bh(ifp, |
5c578aed | 3480 | &inet6_addr_lst[i], addr_lst) { |
1da177e4 | 3481 | unsigned long age; |
1da177e4 | 3482 | |
fad8da3e YA |
3483 | /* When setting preferred_lft to a value not zero or |
3484 | * infinity, while valid_lft is infinity | |
3485 | * IFA_F_PERMANENT has a non-infinity life time. | |
3486 | */ | |
3487 | if ((ifp->flags & IFA_F_PERMANENT) && | |
3488 | (ifp->prefered_lft == INFINITY_LIFE_TIME)) | |
1da177e4 LT |
3489 | continue; |
3490 | ||
3491 | spin_lock(&ifp->lock); | |
b2db7564 YH |
3492 | /* We try to batch several events at once. */ |
3493 | age = (now - ifp->tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ; | |
1da177e4 | 3494 | |
8f27ebb9 YH |
3495 | if (ifp->valid_lft != INFINITY_LIFE_TIME && |
3496 | age >= ifp->valid_lft) { | |
1da177e4 LT |
3497 | spin_unlock(&ifp->lock); |
3498 | in6_ifa_hold(ifp); | |
1da177e4 LT |
3499 | ipv6_del_addr(ifp); |
3500 | goto restart; | |
8f27ebb9 YH |
3501 | } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { |
3502 | spin_unlock(&ifp->lock); | |
3503 | continue; | |
1da177e4 | 3504 | } else if (age >= ifp->prefered_lft) { |
a1ed0526 | 3505 | /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */ |
1da177e4 LT |
3506 | int deprecate = 0; |
3507 | ||
3508 | if (!(ifp->flags&IFA_F_DEPRECATED)) { | |
3509 | deprecate = 1; | |
3510 | ifp->flags |= IFA_F_DEPRECATED; | |
3511 | } | |
3512 | ||
fad8da3e YA |
3513 | if ((ifp->valid_lft != INFINITY_LIFE_TIME) && |
3514 | (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))) | |
1da177e4 LT |
3515 | next = ifp->tstamp + ifp->valid_lft * HZ; |
3516 | ||
3517 | spin_unlock(&ifp->lock); | |
3518 | ||
3519 | if (deprecate) { | |
3520 | in6_ifa_hold(ifp); | |
1da177e4 LT |
3521 | |
3522 | ipv6_ifa_notify(0, ifp); | |
3523 | in6_ifa_put(ifp); | |
3524 | goto restart; | |
3525 | } | |
1da177e4 LT |
3526 | } else if ((ifp->flags&IFA_F_TEMPORARY) && |
3527 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
88949cf4 | 3528 | unsigned long regen_advance = ifp->idev->cnf.regen_max_retry * |
3529 | ifp->idev->cnf.dad_transmits * | |
1f9248e5 | 3530 | NEIGH_VAR(ifp->idev->nd_parms, RETRANS_TIME) / HZ; |
88949cf4 | 3531 | |
1da177e4 LT |
3532 | if (age >= ifp->prefered_lft - regen_advance) { |
3533 | struct inet6_ifaddr *ifpub = ifp->ifpub; | |
3534 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
3535 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
3536 | if (!ifp->regen_count && ifpub) { | |
3537 | ifp->regen_count++; | |
3538 | in6_ifa_hold(ifp); | |
3539 | in6_ifa_hold(ifpub); | |
3540 | spin_unlock(&ifp->lock); | |
5c578aed | 3541 | |
291d809b HY |
3542 | spin_lock(&ifpub->lock); |
3543 | ifpub->regen_count = 0; | |
3544 | spin_unlock(&ifpub->lock); | |
1da177e4 LT |
3545 | ipv6_create_tempaddr(ifpub, ifp); |
3546 | in6_ifa_put(ifpub); | |
3547 | in6_ifa_put(ifp); | |
3548 | goto restart; | |
3549 | } | |
3550 | } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) | |
3551 | next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; | |
3552 | spin_unlock(&ifp->lock); | |
1da177e4 LT |
3553 | } else { |
3554 | /* ifp->prefered_lft <= ifp->valid_lft */ | |
3555 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
3556 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
3557 | spin_unlock(&ifp->lock); | |
3558 | } | |
3559 | } | |
1da177e4 LT |
3560 | } |
3561 | ||
b2db7564 YH |
3562 | next_sec = round_jiffies_up(next); |
3563 | next_sched = next; | |
3564 | ||
3565 | /* If rounded timeout is accurate enough, accept it. */ | |
3566 | if (time_before(next_sec, next + ADDRCONF_TIMER_FUZZ)) | |
3567 | next_sched = next_sec; | |
3568 | ||
3569 | /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */ | |
3570 | if (time_before(next_sched, jiffies + ADDRCONF_TIMER_FUZZ_MAX)) | |
3571 | next_sched = jiffies + ADDRCONF_TIMER_FUZZ_MAX; | |
3572 | ||
ba3542e1 | 3573 | ADBG(KERN_DEBUG "now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n", |
3574 | now, next, next_sec, next_sched); | |
b2db7564 YH |
3575 | |
3576 | addr_chk_timer.expires = next_sched; | |
1da177e4 | 3577 | add_timer(&addr_chk_timer); |
5c578aed | 3578 | spin_unlock(&addrconf_verify_lock); |
3579 | rcu_read_unlock_bh(); | |
1da177e4 LT |
3580 | } |
3581 | ||
caeaba79 ND |
3582 | static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local, |
3583 | struct in6_addr **peer_pfx) | |
461d8837 TG |
3584 | { |
3585 | struct in6_addr *pfx = NULL; | |
3586 | ||
caeaba79 ND |
3587 | *peer_pfx = NULL; |
3588 | ||
461d8837 TG |
3589 | if (addr) |
3590 | pfx = nla_data(addr); | |
3591 | ||
3592 | if (local) { | |
3593 | if (pfx && nla_memcmp(local, pfx, sizeof(*pfx))) | |
caeaba79 ND |
3594 | *peer_pfx = pfx; |
3595 | pfx = nla_data(local); | |
461d8837 TG |
3596 | } |
3597 | ||
3598 | return pfx; | |
3599 | } | |
3600 | ||
ef7c79ed | 3601 | static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = { |
461d8837 TG |
3602 | [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, |
3603 | [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, | |
3604 | [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, | |
479840ff | 3605 | [IFA_FLAGS] = { .len = sizeof(u32) }, |
461d8837 TG |
3606 | }; |
3607 | ||
1da177e4 | 3608 | static int |
661d2967 | 3609 | inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 3610 | { |
3b1e0a65 | 3611 | struct net *net = sock_net(skb->sk); |
b933f716 TG |
3612 | struct ifaddrmsg *ifm; |
3613 | struct nlattr *tb[IFA_MAX+1]; | |
caeaba79 | 3614 | struct in6_addr *pfx, *peer_pfx; |
b933f716 | 3615 | int err; |
1da177e4 | 3616 | |
b933f716 TG |
3617 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3618 | if (err < 0) | |
3619 | return err; | |
3620 | ||
3621 | ifm = nlmsg_data(nlh); | |
caeaba79 | 3622 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer_pfx); |
1da177e4 LT |
3623 | if (pfx == NULL) |
3624 | return -EINVAL; | |
3625 | ||
af284937 | 3626 | return inet6_addr_del(net, ifm->ifa_index, pfx, ifm->ifa_prefixlen); |
1da177e4 LT |
3627 | } |
3628 | ||
479840ff | 3629 | static int inet6_addr_modify(struct inet6_ifaddr *ifp, u32 ifa_flags, |
55ebaef1 | 3630 | u32 prefered_lft, u32 valid_lft) |
081bba5b | 3631 | { |
6f704992 YH |
3632 | u32 flags; |
3633 | clock_t expires; | |
4bed72e4 | 3634 | unsigned long timeout; |
53bd6749 | 3635 | bool was_managetempaddr; |
46d48046 | 3636 | |
081bba5b NT |
3637 | if (!valid_lft || (prefered_lft > valid_lft)) |
3638 | return -EINVAL; | |
3639 | ||
53bd6749 JP |
3640 | if (ifa_flags & IFA_F_MANAGETEMPADDR && |
3641 | (ifp->flags & IFA_F_TEMPORARY || ifp->prefix_len != 64)) | |
3642 | return -EINVAL; | |
3643 | ||
4bed72e4 YH |
3644 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
3645 | if (addrconf_finite_timeout(timeout)) { | |
3646 | expires = jiffies_to_clock_t(timeout * HZ); | |
3647 | valid_lft = timeout; | |
6f704992 | 3648 | flags = RTF_EXPIRES; |
4bed72e4 YH |
3649 | } else { |
3650 | expires = 0; | |
3651 | flags = 0; | |
3652 | ifa_flags |= IFA_F_PERMANENT; | |
6f704992 | 3653 | } |
081bba5b | 3654 | |
4bed72e4 YH |
3655 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
3656 | if (addrconf_finite_timeout(timeout)) { | |
3657 | if (timeout == 0) | |
3658 | ifa_flags |= IFA_F_DEPRECATED; | |
3659 | prefered_lft = timeout; | |
3660 | } | |
081bba5b NT |
3661 | |
3662 | spin_lock_bh(&ifp->lock); | |
53bd6749 JP |
3663 | was_managetempaddr = ifp->flags & IFA_F_MANAGETEMPADDR; |
3664 | ifp->flags &= ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | | |
3665 | IFA_F_HOMEADDRESS | IFA_F_MANAGETEMPADDR); | |
3666 | ifp->flags |= ifa_flags; | |
081bba5b NT |
3667 | ifp->tstamp = jiffies; |
3668 | ifp->valid_lft = valid_lft; | |
3669 | ifp->prefered_lft = prefered_lft; | |
3670 | ||
3671 | spin_unlock_bh(&ifp->lock); | |
3672 | if (!(ifp->flags&IFA_F_TENTATIVE)) | |
3673 | ipv6_ifa_notify(0, ifp); | |
081bba5b | 3674 | |
46d48046 | 3675 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev, |
6f704992 | 3676 | expires, flags); |
53bd6749 JP |
3677 | |
3678 | if (was_managetempaddr || ifp->flags & IFA_F_MANAGETEMPADDR) { | |
3679 | if (was_managetempaddr && !(ifp->flags & IFA_F_MANAGETEMPADDR)) | |
3680 | valid_lft = prefered_lft = 0; | |
3681 | manage_tempaddrs(ifp->idev, ifp, valid_lft, prefered_lft, | |
3682 | !was_managetempaddr, jiffies); | |
3683 | } | |
3684 | ||
081bba5b NT |
3685 | addrconf_verify(0); |
3686 | ||
3687 | return 0; | |
3688 | } | |
3689 | ||
1da177e4 | 3690 | static int |
661d2967 | 3691 | inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 3692 | { |
3b1e0a65 | 3693 | struct net *net = sock_net(skb->sk); |
461d8837 TG |
3694 | struct ifaddrmsg *ifm; |
3695 | struct nlattr *tb[IFA_MAX+1]; | |
caeaba79 | 3696 | struct in6_addr *pfx, *peer_pfx; |
7198f8ce TG |
3697 | struct inet6_ifaddr *ifa; |
3698 | struct net_device *dev; | |
55ebaef1 | 3699 | u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; |
479840ff | 3700 | u32 ifa_flags; |
461d8837 | 3701 | int err; |
1da177e4 | 3702 | |
461d8837 TG |
3703 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3704 | if (err < 0) | |
3705 | return err; | |
3706 | ||
3707 | ifm = nlmsg_data(nlh); | |
caeaba79 | 3708 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer_pfx); |
1da177e4 LT |
3709 | if (pfx == NULL) |
3710 | return -EINVAL; | |
3711 | ||
461d8837 | 3712 | if (tb[IFA_CACHEINFO]) { |
0778769d | 3713 | struct ifa_cacheinfo *ci; |
461d8837 TG |
3714 | |
3715 | ci = nla_data(tb[IFA_CACHEINFO]); | |
0778769d | 3716 | valid_lft = ci->ifa_valid; |
461d8837 TG |
3717 | preferred_lft = ci->ifa_prefered; |
3718 | } else { | |
3719 | preferred_lft = INFINITY_LIFE_TIME; | |
3720 | valid_lft = INFINITY_LIFE_TIME; | |
0778769d NT |
3721 | } |
3722 | ||
af284937 | 3723 | dev = __dev_get_by_index(net, ifm->ifa_index); |
7198f8ce TG |
3724 | if (dev == NULL) |
3725 | return -ENODEV; | |
3726 | ||
479840ff JP |
3727 | ifa_flags = tb[IFA_FLAGS] ? nla_get_u32(tb[IFA_FLAGS]) : ifm->ifa_flags; |
3728 | ||
55ebaef1 | 3729 | /* We ignore other flags so far. */ |
53bd6749 | 3730 | ifa_flags &= IFA_F_NODAD | IFA_F_HOMEADDRESS | IFA_F_MANAGETEMPADDR; |
55ebaef1 | 3731 | |
1cab3da6 | 3732 | ifa = ipv6_get_ifaddr(net, pfx, dev, 1); |
7198f8ce TG |
3733 | if (ifa == NULL) { |
3734 | /* | |
3735 | * It would be best to check for !NLM_F_CREATE here but | |
3736 | * userspace alreay relies on not having to provide this. | |
3737 | */ | |
caeaba79 | 3738 | return inet6_addr_add(net, ifm->ifa_index, pfx, peer_pfx, |
af284937 DL |
3739 | ifm->ifa_prefixlen, ifa_flags, |
3740 | preferred_lft, valid_lft); | |
081bba5b NT |
3741 | } |
3742 | ||
7198f8ce TG |
3743 | if (nlh->nlmsg_flags & NLM_F_EXCL || |
3744 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) | |
3745 | err = -EEXIST; | |
3746 | else | |
55ebaef1 | 3747 | err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft); |
7198f8ce TG |
3748 | |
3749 | in6_ifa_put(ifa); | |
3750 | ||
3751 | return err; | |
1da177e4 LT |
3752 | } |
3753 | ||
479840ff | 3754 | static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u32 flags, |
101bb229 TG |
3755 | u8 scope, int ifindex) |
3756 | { | |
3757 | struct ifaddrmsg *ifm; | |
3758 | ||
3759 | ifm = nlmsg_data(nlh); | |
3760 | ifm->ifa_family = AF_INET6; | |
3761 | ifm->ifa_prefixlen = prefixlen; | |
3762 | ifm->ifa_flags = flags; | |
3763 | ifm->ifa_scope = scope; | |
3764 | ifm->ifa_index = ifindex; | |
3765 | } | |
3766 | ||
85486af0 TG |
3767 | static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, |
3768 | unsigned long tstamp, u32 preferred, u32 valid) | |
3769 | { | |
3770 | struct ifa_cacheinfo ci; | |
3771 | ||
18a31e1e TG |
3772 | ci.cstamp = cstamp_delta(cstamp); |
3773 | ci.tstamp = cstamp_delta(tstamp); | |
85486af0 TG |
3774 | ci.ifa_prefered = preferred; |
3775 | ci.ifa_valid = valid; | |
3776 | ||
3777 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
3778 | } | |
3779 | ||
101bb229 TG |
3780 | static inline int rt_scope(int ifa_scope) |
3781 | { | |
3782 | if (ifa_scope & IFA_HOST) | |
3783 | return RT_SCOPE_HOST; | |
3784 | else if (ifa_scope & IFA_LINK) | |
3785 | return RT_SCOPE_LINK; | |
3786 | else if (ifa_scope & IFA_SITE) | |
3787 | return RT_SCOPE_SITE; | |
3788 | else | |
3789 | return RT_SCOPE_UNIVERSE; | |
3790 | } | |
3791 | ||
0ab6803b TG |
3792 | static inline int inet6_ifaddr_msgsize(void) |
3793 | { | |
339bf98f | 3794 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
caeaba79 | 3795 | + nla_total_size(16) /* IFA_LOCAL */ |
339bf98f | 3796 | + nla_total_size(16) /* IFA_ADDRESS */ |
479840ff JP |
3797 | + nla_total_size(sizeof(struct ifa_cacheinfo)) |
3798 | + nla_total_size(4) /* IFA_FLAGS */; | |
0ab6803b | 3799 | } |
c5396a31 | 3800 | |
1da177e4 | 3801 | static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, |
15e47304 | 3802 | u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3803 | { |
1da177e4 | 3804 | struct nlmsghdr *nlh; |
85486af0 | 3805 | u32 preferred, valid; |
1da177e4 | 3806 | |
15e47304 | 3807 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
0ab6803b | 3808 | if (nlh == NULL) |
26932566 | 3809 | return -EMSGSIZE; |
0ab6803b | 3810 | |
101bb229 TG |
3811 | put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), |
3812 | ifa->idev->dev->ifindex); | |
3813 | ||
fad8da3e YA |
3814 | if (!((ifa->flags&IFA_F_PERMANENT) && |
3815 | (ifa->prefered_lft == INFINITY_LIFE_TIME))) { | |
85486af0 TG |
3816 | preferred = ifa->prefered_lft; |
3817 | valid = ifa->valid_lft; | |
3818 | if (preferred != INFINITY_LIFE_TIME) { | |
1da177e4 | 3819 | long tval = (jiffies - ifa->tstamp)/HZ; |
a1faa698 JR |
3820 | if (preferred > tval) |
3821 | preferred -= tval; | |
3822 | else | |
3823 | preferred = 0; | |
f56619fc BH |
3824 | if (valid != INFINITY_LIFE_TIME) { |
3825 | if (valid > tval) | |
3826 | valid -= tval; | |
3827 | else | |
3828 | valid = 0; | |
3829 | } | |
1da177e4 LT |
3830 | } |
3831 | } else { | |
85486af0 TG |
3832 | preferred = INFINITY_LIFE_TIME; |
3833 | valid = INFINITY_LIFE_TIME; | |
3834 | } | |
3835 | ||
7996c799 | 3836 | if (!ipv6_addr_any(&ifa->peer_addr)) { |
caeaba79 ND |
3837 | if (nla_put(skb, IFA_LOCAL, 16, &ifa->addr) < 0 || |
3838 | nla_put(skb, IFA_ADDRESS, 16, &ifa->peer_addr) < 0) | |
3839 | goto error; | |
3840 | } else | |
3841 | if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0) | |
3842 | goto error; | |
3843 | ||
3844 | if (put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) | |
3845 | goto error; | |
1da177e4 | 3846 | |
479840ff JP |
3847 | if (nla_put_u32(skb, IFA_FLAGS, ifa->flags) < 0) |
3848 | goto error; | |
3849 | ||
0ab6803b | 3850 | return nlmsg_end(skb, nlh); |
caeaba79 ND |
3851 | |
3852 | error: | |
3853 | nlmsg_cancel(skb, nlh); | |
3854 | return -EMSGSIZE; | |
1da177e4 LT |
3855 | } |
3856 | ||
3857 | static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, | |
15e47304 | 3858 | u32 portid, u32 seq, int event, u16 flags) |
1da177e4 | 3859 | { |
1da177e4 | 3860 | struct nlmsghdr *nlh; |
101bb229 TG |
3861 | u8 scope = RT_SCOPE_UNIVERSE; |
3862 | int ifindex = ifmca->idev->dev->ifindex; | |
3863 | ||
3864 | if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE) | |
3865 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3866 | |
15e47304 | 3867 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
0ab6803b | 3868 | if (nlh == NULL) |
26932566 | 3869 | return -EMSGSIZE; |
85486af0 | 3870 | |
0ab6803b TG |
3871 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3872 | if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 || | |
3873 | put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp, | |
26932566 PM |
3874 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
3875 | nlmsg_cancel(skb, nlh); | |
3876 | return -EMSGSIZE; | |
3877 | } | |
85486af0 | 3878 | |
0ab6803b | 3879 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3880 | } |
3881 | ||
3882 | static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, | |
15e47304 | 3883 | u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4 | 3884 | { |
1da177e4 | 3885 | struct nlmsghdr *nlh; |
101bb229 TG |
3886 | u8 scope = RT_SCOPE_UNIVERSE; |
3887 | int ifindex = ifaca->aca_idev->dev->ifindex; | |
3888 | ||
3889 | if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) | |
3890 | scope = RT_SCOPE_SITE; | |
1da177e4 | 3891 | |
15e47304 | 3892 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
0ab6803b | 3893 | if (nlh == NULL) |
26932566 | 3894 | return -EMSGSIZE; |
85486af0 | 3895 | |
0ab6803b TG |
3896 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
3897 | if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 || | |
3898 | put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp, | |
26932566 PM |
3899 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
3900 | nlmsg_cancel(skb, nlh); | |
3901 | return -EMSGSIZE; | |
3902 | } | |
1da177e4 | 3903 | |
0ab6803b | 3904 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
3905 | } |
3906 | ||
e21e8467 | 3907 | enum addr_type_t { |
1da177e4 LT |
3908 | UNICAST_ADDR, |
3909 | MULTICAST_ADDR, | |
3910 | ANYCAST_ADDR, | |
3911 | }; | |
3912 | ||
234b27c3 ED |
3913 | /* called with rcu_read_lock() */ |
3914 | static int in6_dump_addrs(struct inet6_dev *idev, struct sk_buff *skb, | |
3915 | struct netlink_callback *cb, enum addr_type_t type, | |
3916 | int s_ip_idx, int *p_ip_idx) | |
3917 | { | |
234b27c3 ED |
3918 | struct ifmcaddr6 *ifmca; |
3919 | struct ifacaddr6 *ifaca; | |
3920 | int err = 1; | |
3921 | int ip_idx = *p_ip_idx; | |
3922 | ||
3923 | read_lock_bh(&idev->lock); | |
3924 | switch (type) { | |
502a2ffd | 3925 | case UNICAST_ADDR: { |
3926 | struct inet6_ifaddr *ifa; | |
3927 | ||
234b27c3 | 3928 | /* unicast address incl. temp addr */ |
502a2ffd | 3929 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
3930 | if (++ip_idx < s_ip_idx) | |
234b27c3 ED |
3931 | continue; |
3932 | err = inet6_fill_ifaddr(skb, ifa, | |
15e47304 | 3933 | NETLINK_CB(cb->skb).portid, |
234b27c3 ED |
3934 | cb->nlh->nlmsg_seq, |
3935 | RTM_NEWADDR, | |
3936 | NLM_F_MULTI); | |
3937 | if (err <= 0) | |
3938 | break; | |
63998ac2 | 3939 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
234b27c3 ED |
3940 | } |
3941 | break; | |
502a2ffd | 3942 | } |
234b27c3 ED |
3943 | case MULTICAST_ADDR: |
3944 | /* multicast address */ | |
3945 | for (ifmca = idev->mc_list; ifmca; | |
3946 | ifmca = ifmca->next, ip_idx++) { | |
3947 | if (ip_idx < s_ip_idx) | |
3948 | continue; | |
3949 | err = inet6_fill_ifmcaddr(skb, ifmca, | |
15e47304 | 3950 | NETLINK_CB(cb->skb).portid, |
234b27c3 ED |
3951 | cb->nlh->nlmsg_seq, |
3952 | RTM_GETMULTICAST, | |
3953 | NLM_F_MULTI); | |
3954 | if (err <= 0) | |
3955 | break; | |
3956 | } | |
3957 | break; | |
3958 | case ANYCAST_ADDR: | |
3959 | /* anycast address */ | |
3960 | for (ifaca = idev->ac_list; ifaca; | |
3961 | ifaca = ifaca->aca_next, ip_idx++) { | |
3962 | if (ip_idx < s_ip_idx) | |
3963 | continue; | |
3964 | err = inet6_fill_ifacaddr(skb, ifaca, | |
15e47304 | 3965 | NETLINK_CB(cb->skb).portid, |
234b27c3 ED |
3966 | cb->nlh->nlmsg_seq, |
3967 | RTM_GETANYCAST, | |
3968 | NLM_F_MULTI); | |
3969 | if (err <= 0) | |
3970 | break; | |
3971 | } | |
3972 | break; | |
3973 | default: | |
3974 | break; | |
3975 | } | |
3976 | read_unlock_bh(&idev->lock); | |
3977 | *p_ip_idx = ip_idx; | |
3978 | return err; | |
3979 | } | |
3980 | ||
1da177e4 LT |
3981 | static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, |
3982 | enum addr_type_t type) | |
3983 | { | |
234b27c3 ED |
3984 | struct net *net = sock_net(skb->sk); |
3985 | int h, s_h; | |
1da177e4 LT |
3986 | int idx, ip_idx; |
3987 | int s_idx, s_ip_idx; | |
1da177e4 | 3988 | struct net_device *dev; |
234b27c3 ED |
3989 | struct inet6_dev *idev; |
3990 | struct hlist_head *head; | |
1ab1457c | 3991 | |
234b27c3 ED |
3992 | s_h = cb->args[0]; |
3993 | s_idx = idx = cb->args[1]; | |
3994 | s_ip_idx = ip_idx = cb->args[2]; | |
5d5619b4 | 3995 | |
234b27c3 | 3996 | rcu_read_lock(); |
63998ac2 | 3997 | cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^ net->dev_base_seq; |
234b27c3 ED |
3998 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { |
3999 | idx = 0; | |
4000 | head = &net->dev_index_head[h]; | |
b67bfe0d | 4001 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
234b27c3 ED |
4002 | if (idx < s_idx) |
4003 | goto cont; | |
4b97efdf | 4004 | if (h > s_h || idx > s_idx) |
234b27c3 ED |
4005 | s_ip_idx = 0; |
4006 | ip_idx = 0; | |
e21e8467 SH |
4007 | idev = __in6_dev_get(dev); |
4008 | if (!idev) | |
234b27c3 ED |
4009 | goto cont; |
4010 | ||
4011 | if (in6_dump_addrs(idev, skb, cb, type, | |
4012 | s_ip_idx, &ip_idx) <= 0) | |
4013 | goto done; | |
7562f876 | 4014 | cont: |
234b27c3 ED |
4015 | idx++; |
4016 | } | |
1da177e4 | 4017 | } |
234b27c3 ED |
4018 | done: |
4019 | rcu_read_unlock(); | |
4020 | cb->args[0] = h; | |
4021 | cb->args[1] = idx; | |
4022 | cb->args[2] = ip_idx; | |
4023 | ||
1da177e4 LT |
4024 | return skb->len; |
4025 | } | |
4026 | ||
4027 | static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
4028 | { | |
4029 | enum addr_type_t type = UNICAST_ADDR; | |
b854272b | 4030 | |
1da177e4 LT |
4031 | return inet6_dump_addr(skb, cb, type); |
4032 | } | |
4033 | ||
4034 | static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
4035 | { | |
4036 | enum addr_type_t type = MULTICAST_ADDR; | |
b854272b | 4037 | |
1da177e4 LT |
4038 | return inet6_dump_addr(skb, cb, type); |
4039 | } | |
4040 | ||
4041 | ||
4042 | static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
4043 | { | |
4044 | enum addr_type_t type = ANYCAST_ADDR; | |
b854272b | 4045 | |
1da177e4 LT |
4046 | return inet6_dump_addr(skb, cb, type); |
4047 | } | |
4048 | ||
661d2967 | 4049 | static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr *nlh) |
6c223828 | 4050 | { |
3b1e0a65 | 4051 | struct net *net = sock_net(in_skb->sk); |
1b29fc2c TG |
4052 | struct ifaddrmsg *ifm; |
4053 | struct nlattr *tb[IFA_MAX+1]; | |
caeaba79 | 4054 | struct in6_addr *addr = NULL, *peer; |
6c223828 NT |
4055 | struct net_device *dev = NULL; |
4056 | struct inet6_ifaddr *ifa; | |
4057 | struct sk_buff *skb; | |
6c223828 NT |
4058 | int err; |
4059 | ||
1b29fc2c TG |
4060 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
4061 | if (err < 0) | |
4062 | goto errout; | |
4063 | ||
caeaba79 | 4064 | addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer); |
1b29fc2c TG |
4065 | if (addr == NULL) { |
4066 | err = -EINVAL; | |
4067 | goto errout; | |
6c223828 | 4068 | } |
6c223828 | 4069 | |
1b29fc2c | 4070 | ifm = nlmsg_data(nlh); |
6c223828 | 4071 | if (ifm->ifa_index) |
6fda7350 | 4072 | dev = __dev_get_by_index(net, ifm->ifa_index); |
6c223828 | 4073 | |
e21e8467 SH |
4074 | ifa = ipv6_get_ifaddr(net, addr, dev, 1); |
4075 | if (!ifa) { | |
1b29fc2c TG |
4076 | err = -EADDRNOTAVAIL; |
4077 | goto errout; | |
4078 | } | |
6c223828 | 4079 | |
e21e8467 SH |
4080 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL); |
4081 | if (!skb) { | |
6c223828 | 4082 | err = -ENOBUFS; |
1b29fc2c | 4083 | goto errout_ifa; |
6c223828 NT |
4084 | } |
4085 | ||
15e47304 | 4086 | err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).portid, |
6c223828 | 4087 | nlh->nlmsg_seq, RTM_NEWADDR, 0); |
26932566 PM |
4088 | if (err < 0) { |
4089 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
4090 | WARN_ON(err == -EMSGSIZE); | |
4091 | kfree_skb(skb); | |
4092 | goto errout_ifa; | |
4093 | } | |
15e47304 | 4094 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); |
1b29fc2c | 4095 | errout_ifa: |
6c223828 | 4096 | in6_ifa_put(ifa); |
1b29fc2c | 4097 | errout: |
6c223828 | 4098 | return err; |
6c223828 NT |
4099 | } |
4100 | ||
1da177e4 LT |
4101 | static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) |
4102 | { | |
4103 | struct sk_buff *skb; | |
c346dca1 | 4104 | struct net *net = dev_net(ifa->idev->dev); |
5d620266 | 4105 | int err = -ENOBUFS; |
1da177e4 | 4106 | |
0ab6803b | 4107 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); |
5d620266 TG |
4108 | if (skb == NULL) |
4109 | goto errout; | |
4110 | ||
4111 | err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0); | |
26932566 PM |
4112 | if (err < 0) { |
4113 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
4114 | WARN_ON(err == -EMSGSIZE); | |
4115 | kfree_skb(skb); | |
4116 | goto errout; | |
4117 | } | |
1ce85fe4 PNA |
4118 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
4119 | return; | |
5d620266 TG |
4120 | errout: |
4121 | if (err < 0) | |
6fda7350 | 4122 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); |
1da177e4 LT |
4123 | } |
4124 | ||
b6f99a21 | 4125 | static inline void ipv6_store_devconf(struct ipv6_devconf *cnf, |
1da177e4 LT |
4126 | __s32 *array, int bytes) |
4127 | { | |
04561c1f TG |
4128 | BUG_ON(bytes < (DEVCONF_MAX * 4)); |
4129 | ||
1da177e4 LT |
4130 | memset(array, 0, bytes); |
4131 | array[DEVCONF_FORWARDING] = cnf->forwarding; | |
4132 | array[DEVCONF_HOPLIMIT] = cnf->hop_limit; | |
4133 | array[DEVCONF_MTU6] = cnf->mtu6; | |
4134 | array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; | |
4135 | array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; | |
4136 | array[DEVCONF_AUTOCONF] = cnf->autoconf; | |
4137 | array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; | |
4138 | array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; | |
93908d19 TG |
4139 | array[DEVCONF_RTR_SOLICIT_INTERVAL] = |
4140 | jiffies_to_msecs(cnf->rtr_solicit_interval); | |
4141 | array[DEVCONF_RTR_SOLICIT_DELAY] = | |
4142 | jiffies_to_msecs(cnf->rtr_solicit_delay); | |
1da177e4 | 4143 | array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; |
fc4eba58 HFS |
4144 | array[DEVCONF_MLDV1_UNSOLICITED_REPORT_INTERVAL] = |
4145 | jiffies_to_msecs(cnf->mldv1_unsolicited_report_interval); | |
4146 | array[DEVCONF_MLDV2_UNSOLICITED_REPORT_INTERVAL] = | |
4147 | jiffies_to_msecs(cnf->mldv2_unsolicited_report_interval); | |
1da177e4 LT |
4148 | array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; |
4149 | array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; | |
4150 | array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; | |
4151 | array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; | |
4152 | array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; | |
1da177e4 | 4153 | array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; |
65f5c7c1 | 4154 | array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; |
c4fd30eb | 4155 | array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; |
930d6ff2 YH |
4156 | #ifdef CONFIG_IPV6_ROUTER_PREF |
4157 | array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; | |
93908d19 TG |
4158 | array[DEVCONF_RTR_PROBE_INTERVAL] = |
4159 | jiffies_to_msecs(cnf->rtr_probe_interval); | |
fa03ef38 | 4160 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 YH |
4161 | array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; |
4162 | #endif | |
930d6ff2 | 4163 | #endif |
fbea49e1 | 4164 | array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp; |
0bcbc926 | 4165 | array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route; |
95c385b4 NH |
4166 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
4167 | array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad; | |
4168 | #endif | |
7bc570c8 YH |
4169 | #ifdef CONFIG_IPV6_MROUTE |
4170 | array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding; | |
4171 | #endif | |
778d80be | 4172 | array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6; |
1b34be74 | 4173 | array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad; |
c3faca05 | 4174 | array[DEVCONF_FORCE_TLLAO] = cnf->force_tllao; |
5cb04436 | 4175 | array[DEVCONF_NDISC_NOTIFY] = cnf->ndisc_notify; |
b800c3b9 | 4176 | array[DEVCONF_SUPPRESS_FRAG_NDISC] = cnf->suppress_frag_ndisc; |
1da177e4 LT |
4177 | } |
4178 | ||
b382b191 TG |
4179 | static inline size_t inet6_ifla6_size(void) |
4180 | { | |
4181 | return nla_total_size(4) /* IFLA_INET6_FLAGS */ | |
4182 | + nla_total_size(sizeof(struct ifla_cacheinfo)) | |
4183 | + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */ | |
4184 | + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */ | |
f53adae4 DB |
4185 | + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */ |
4186 | + nla_total_size(sizeof(struct in6_addr)); /* IFLA_INET6_TOKEN */ | |
b382b191 TG |
4187 | } |
4188 | ||
339bf98f TG |
4189 | static inline size_t inet6_if_nlmsg_size(void) |
4190 | { | |
4191 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
4192 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
4193 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ | |
4194 | + nla_total_size(4) /* IFLA_MTU */ | |
4195 | + nla_total_size(4) /* IFLA_LINK */ | |
b382b191 | 4196 | + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */ |
339bf98f | 4197 | } |
c5396a31 | 4198 | |
be281e55 | 4199 | static inline void __snmp6_fill_statsdev(u64 *stats, atomic_long_t *mib, |
7d720c3e | 4200 | int items, int bytes) |
7f7d9a6b HX |
4201 | { |
4202 | int i; | |
4203 | int pad = bytes - sizeof(u64) * items; | |
4204 | BUG_ON(pad < 0); | |
4205 | ||
4206 | /* Use put_unaligned() because stats may not be aligned for u64. */ | |
4207 | put_unaligned(items, &stats[0]); | |
4208 | for (i = 1; i < items; i++) | |
be281e55 | 4209 | put_unaligned(atomic_long_read(&mib[i]), &stats[i]); |
7f7d9a6b HX |
4210 | |
4211 | memset(&stats[items], 0, pad); | |
4212 | } | |
4213 | ||
4ce3c183 ED |
4214 | static inline void __snmp6_fill_stats64(u64 *stats, void __percpu **mib, |
4215 | int items, int bytes, size_t syncpoff) | |
4216 | { | |
4217 | int i; | |
4218 | int pad = bytes - sizeof(u64) * items; | |
4219 | BUG_ON(pad < 0); | |
4220 | ||
4221 | /* Use put_unaligned() because stats may not be aligned for u64. */ | |
4222 | put_unaligned(items, &stats[0]); | |
4223 | for (i = 1; i < items; i++) | |
4224 | put_unaligned(snmp_fold_field64(mib, i, syncpoff), &stats[i]); | |
4225 | ||
4226 | memset(&stats[items], 0, pad); | |
4227 | } | |
4228 | ||
7f7d9a6b HX |
4229 | static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype, |
4230 | int bytes) | |
4231 | { | |
e21e8467 | 4232 | switch (attrtype) { |
7f7d9a6b | 4233 | case IFLA_INET6_STATS: |
4ce3c183 ED |
4234 | __snmp6_fill_stats64(stats, (void __percpu **)idev->stats.ipv6, |
4235 | IPSTATS_MIB_MAX, bytes, offsetof(struct ipstats_mib, syncp)); | |
7f7d9a6b HX |
4236 | break; |
4237 | case IFLA_INET6_ICMP6STATS: | |
be281e55 | 4238 | __snmp6_fill_statsdev(stats, idev->stats.icmpv6dev->mibs, ICMP6_MIB_MAX, bytes); |
7f7d9a6b HX |
4239 | break; |
4240 | } | |
4241 | } | |
4242 | ||
b382b191 TG |
4243 | static int inet6_fill_ifla6_attrs(struct sk_buff *skb, struct inet6_dev *idev) |
4244 | { | |
4245 | struct nlattr *nla; | |
4246 | struct ifla_cacheinfo ci; | |
4247 | ||
c78679e8 DM |
4248 | if (nla_put_u32(skb, IFLA_INET6_FLAGS, idev->if_flags)) |
4249 | goto nla_put_failure; | |
b382b191 | 4250 | ci.max_reasm_len = IPV6_MAXPLEN; |
24912420 DM |
4251 | ci.tstamp = cstamp_delta(idev->tstamp); |
4252 | ci.reachable_time = jiffies_to_msecs(idev->nd_parms->reachable_time); | |
1f9248e5 | 4253 | ci.retrans_time = jiffies_to_msecs(NEIGH_VAR(idev->nd_parms, RETRANS_TIME)); |
c78679e8 DM |
4254 | if (nla_put(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci)) |
4255 | goto nla_put_failure; | |
b382b191 TG |
4256 | nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32)); |
4257 | if (nla == NULL) | |
4258 | goto nla_put_failure; | |
4259 | ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla)); | |
4260 | ||
4261 | /* XXX - MC not implemented */ | |
4262 | ||
4263 | nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64)); | |
4264 | if (nla == NULL) | |
4265 | goto nla_put_failure; | |
4266 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla)); | |
4267 | ||
4268 | nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64)); | |
4269 | if (nla == NULL) | |
4270 | goto nla_put_failure; | |
4271 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla)); | |
4272 | ||
f53adae4 DB |
4273 | nla = nla_reserve(skb, IFLA_INET6_TOKEN, sizeof(struct in6_addr)); |
4274 | if (nla == NULL) | |
4275 | goto nla_put_failure; | |
4276 | read_lock_bh(&idev->lock); | |
4277 | memcpy(nla_data(nla), idev->token.s6_addr, nla_len(nla)); | |
4278 | read_unlock_bh(&idev->lock); | |
4279 | ||
b382b191 TG |
4280 | return 0; |
4281 | ||
4282 | nla_put_failure: | |
4283 | return -EMSGSIZE; | |
4284 | } | |
4285 | ||
4286 | static size_t inet6_get_link_af_size(const struct net_device *dev) | |
4287 | { | |
4288 | if (!__in6_dev_get(dev)) | |
4289 | return 0; | |
4290 | ||
4291 | return inet6_ifla6_size(); | |
4292 | } | |
4293 | ||
4294 | static int inet6_fill_link_af(struct sk_buff *skb, const struct net_device *dev) | |
4295 | { | |
4296 | struct inet6_dev *idev = __in6_dev_get(dev); | |
4297 | ||
4298 | if (!idev) | |
4299 | return -ENODATA; | |
4300 | ||
4301 | if (inet6_fill_ifla6_attrs(skb, idev) < 0) | |
4302 | return -EMSGSIZE; | |
4303 | ||
4304 | return 0; | |
4305 | } | |
4306 | ||
f53adae4 DB |
4307 | static int inet6_set_iftoken(struct inet6_dev *idev, struct in6_addr *token) |
4308 | { | |
f53adae4 DB |
4309 | struct inet6_ifaddr *ifp; |
4310 | struct net_device *dev = idev->dev; | |
fc403832 | 4311 | bool update_rs = false; |
dc848292 | 4312 | struct in6_addr ll_addr; |
f53adae4 DB |
4313 | |
4314 | if (token == NULL) | |
4315 | return -EINVAL; | |
4316 | if (ipv6_addr_any(token)) | |
4317 | return -EINVAL; | |
4318 | if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) | |
4319 | return -EINVAL; | |
f53adae4 DB |
4320 | if (!ipv6_accept_ra(idev)) |
4321 | return -EINVAL; | |
4322 | if (idev->cnf.rtr_solicits <= 0) | |
4323 | return -EINVAL; | |
4324 | ||
4325 | write_lock_bh(&idev->lock); | |
4326 | ||
4327 | BUILD_BUG_ON(sizeof(token->s6_addr) != 16); | |
4328 | memcpy(idev->token.s6_addr + 8, token->s6_addr + 8, 8); | |
4329 | ||
4330 | write_unlock_bh(&idev->lock); | |
4331 | ||
dc848292 HFS |
4332 | if (!idev->dead && (idev->if_flags & IF_READY) && |
4333 | !ipv6_get_lladdr(dev, &ll_addr, IFA_F_TENTATIVE | | |
4334 | IFA_F_OPTIMISTIC)) { | |
fc403832 DB |
4335 | |
4336 | /* If we're not ready, then normal ifup will take care | |
4337 | * of this. Otherwise, we need to request our rs here. | |
4338 | */ | |
4339 | ndisc_send_rs(dev, &ll_addr, &in6addr_linklocal_allrouters); | |
4340 | update_rs = true; | |
4341 | } | |
f53adae4 DB |
4342 | |
4343 | write_lock_bh(&idev->lock); | |
fc403832 | 4344 | |
77ecaace | 4345 | if (update_rs) { |
fc403832 | 4346 | idev->if_flags |= IF_RS_SENT; |
77ecaace HFS |
4347 | idev->rs_probes = 1; |
4348 | addrconf_mod_rs_timer(idev, idev->cnf.rtr_solicit_interval); | |
4349 | } | |
f53adae4 DB |
4350 | |
4351 | /* Well, that's kinda nasty ... */ | |
4352 | list_for_each_entry(ifp, &idev->addr_list, if_list) { | |
4353 | spin_lock(&ifp->lock); | |
617fe29d | 4354 | if (ifp->tokenized) { |
f53adae4 DB |
4355 | ifp->valid_lft = 0; |
4356 | ifp->prefered_lft = 0; | |
4357 | } | |
4358 | spin_unlock(&ifp->lock); | |
4359 | } | |
4360 | ||
4361 | write_unlock_bh(&idev->lock); | |
2b9651d7 | 4362 | addrconf_verify(0); |
f53adae4 DB |
4363 | return 0; |
4364 | } | |
4365 | ||
4366 | static int inet6_set_link_af(struct net_device *dev, const struct nlattr *nla) | |
4367 | { | |
4368 | int err = -EINVAL; | |
4369 | struct inet6_dev *idev = __in6_dev_get(dev); | |
4370 | struct nlattr *tb[IFLA_INET6_MAX + 1]; | |
4371 | ||
4372 | if (!idev) | |
4373 | return -EAFNOSUPPORT; | |
4374 | ||
4375 | if (nla_parse_nested(tb, IFLA_INET6_MAX, nla, NULL) < 0) | |
4376 | BUG(); | |
4377 | ||
4378 | if (tb[IFLA_INET6_TOKEN]) | |
4379 | err = inet6_set_iftoken(idev, nla_data(tb[IFLA_INET6_TOKEN])); | |
4380 | ||
4381 | return err; | |
4382 | } | |
4383 | ||
1ab1457c | 4384 | static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, |
15e47304 | 4385 | u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4 | 4386 | { |
04561c1f | 4387 | struct net_device *dev = idev->dev; |
04561c1f TG |
4388 | struct ifinfomsg *hdr; |
4389 | struct nlmsghdr *nlh; | |
4390 | void *protoinfo; | |
04561c1f | 4391 | |
15e47304 | 4392 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*hdr), flags); |
04561c1f | 4393 | if (nlh == NULL) |
26932566 | 4394 | return -EMSGSIZE; |
04561c1f TG |
4395 | |
4396 | hdr = nlmsg_data(nlh); | |
4397 | hdr->ifi_family = AF_INET6; | |
4398 | hdr->__ifi_pad = 0; | |
4399 | hdr->ifi_type = dev->type; | |
4400 | hdr->ifi_index = dev->ifindex; | |
4401 | hdr->ifi_flags = dev_get_flags(dev); | |
4402 | hdr->ifi_change = 0; | |
4403 | ||
c78679e8 DM |
4404 | if (nla_put_string(skb, IFLA_IFNAME, dev->name) || |
4405 | (dev->addr_len && | |
4406 | nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || | |
4407 | nla_put_u32(skb, IFLA_MTU, dev->mtu) || | |
4408 | (dev->ifindex != dev->iflink && | |
4409 | nla_put_u32(skb, IFLA_LINK, dev->iflink))) | |
4410 | goto nla_put_failure; | |
04561c1f TG |
4411 | protoinfo = nla_nest_start(skb, IFLA_PROTINFO); |
4412 | if (protoinfo == NULL) | |
4413 | goto nla_put_failure; | |
1da177e4 | 4414 | |
b382b191 | 4415 | if (inet6_fill_ifla6_attrs(skb, idev) < 0) |
bf99f1bd | 4416 | goto nla_put_failure; |
1da177e4 | 4417 | |
04561c1f TG |
4418 | nla_nest_end(skb, protoinfo); |
4419 | return nlmsg_end(skb, nlh); | |
1da177e4 | 4420 | |
04561c1f | 4421 | nla_put_failure: |
26932566 PM |
4422 | nlmsg_cancel(skb, nlh); |
4423 | return -EMSGSIZE; | |
1da177e4 LT |
4424 | } |
4425 | ||
4426 | static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) | |
4427 | { | |
3b1e0a65 | 4428 | struct net *net = sock_net(skb->sk); |
84d2697d | 4429 | int h, s_h; |
434a8a58 | 4430 | int idx = 0, s_idx; |
1da177e4 LT |
4431 | struct net_device *dev; |
4432 | struct inet6_dev *idev; | |
84d2697d | 4433 | struct hlist_head *head; |
1da177e4 | 4434 | |
84d2697d ED |
4435 | s_h = cb->args[0]; |
4436 | s_idx = cb->args[1]; | |
4437 | ||
4438 | rcu_read_lock(); | |
4439 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
4440 | idx = 0; | |
4441 | head = &net->dev_index_head[h]; | |
b67bfe0d | 4442 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
84d2697d ED |
4443 | if (idx < s_idx) |
4444 | goto cont; | |
4445 | idev = __in6_dev_get(dev); | |
4446 | if (!idev) | |
4447 | goto cont; | |
4448 | if (inet6_fill_ifinfo(skb, idev, | |
15e47304 | 4449 | NETLINK_CB(cb->skb).portid, |
84d2697d ED |
4450 | cb->nlh->nlmsg_seq, |
4451 | RTM_NEWLINK, NLM_F_MULTI) <= 0) | |
4452 | goto out; | |
7562f876 | 4453 | cont: |
84d2697d ED |
4454 | idx++; |
4455 | } | |
1da177e4 | 4456 | } |
84d2697d ED |
4457 | out: |
4458 | rcu_read_unlock(); | |
4459 | cb->args[1] = idx; | |
4460 | cb->args[0] = h; | |
1da177e4 LT |
4461 | |
4462 | return skb->len; | |
4463 | } | |
4464 | ||
4465 | void inet6_ifinfo_notify(int event, struct inet6_dev *idev) | |
4466 | { | |
4467 | struct sk_buff *skb; | |
c346dca1 | 4468 | struct net *net = dev_net(idev->dev); |
8d7a76c9 | 4469 | int err = -ENOBUFS; |
1ab1457c | 4470 | |
339bf98f | 4471 | skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC); |
8d7a76c9 TG |
4472 | if (skb == NULL) |
4473 | goto errout; | |
4474 | ||
4475 | err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); | |
26932566 PM |
4476 | if (err < 0) { |
4477 | /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */ | |
4478 | WARN_ON(err == -EMSGSIZE); | |
4479 | kfree_skb(skb); | |
4480 | goto errout; | |
4481 | } | |
5f75a104 | 4482 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFINFO, NULL, GFP_ATOMIC); |
1ce85fe4 | 4483 | return; |
8d7a76c9 TG |
4484 | errout: |
4485 | if (err < 0) | |
5f75a104 | 4486 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFINFO, err); |
1da177e4 LT |
4487 | } |
4488 | ||
339bf98f TG |
4489 | static inline size_t inet6_prefix_nlmsg_size(void) |
4490 | { | |
4491 | return NLMSG_ALIGN(sizeof(struct prefixmsg)) | |
4492 | + nla_total_size(sizeof(struct in6_addr)) | |
4493 | + nla_total_size(sizeof(struct prefix_cacheinfo)); | |
4494 | } | |
c5396a31 | 4495 | |
1da177e4 | 4496 | static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, |
15e47304 | 4497 | struct prefix_info *pinfo, u32 portid, u32 seq, |
6051e2f4 | 4498 | int event, unsigned int flags) |
1da177e4 | 4499 | { |
6051e2f4 TG |
4500 | struct prefixmsg *pmsg; |
4501 | struct nlmsghdr *nlh; | |
1da177e4 LT |
4502 | struct prefix_cacheinfo ci; |
4503 | ||
15e47304 | 4504 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*pmsg), flags); |
6051e2f4 | 4505 | if (nlh == NULL) |
26932566 | 4506 | return -EMSGSIZE; |
6051e2f4 TG |
4507 | |
4508 | pmsg = nlmsg_data(nlh); | |
1da177e4 | 4509 | pmsg->prefix_family = AF_INET6; |
8a47077a PM |
4510 | pmsg->prefix_pad1 = 0; |
4511 | pmsg->prefix_pad2 = 0; | |
1da177e4 LT |
4512 | pmsg->prefix_ifindex = idev->dev->ifindex; |
4513 | pmsg->prefix_len = pinfo->prefix_len; | |
4514 | pmsg->prefix_type = pinfo->type; | |
8a47077a | 4515 | pmsg->prefix_pad3 = 0; |
1da177e4 LT |
4516 | pmsg->prefix_flags = 0; |
4517 | if (pinfo->onlink) | |
4518 | pmsg->prefix_flags |= IF_PREFIX_ONLINK; | |
4519 | if (pinfo->autoconf) | |
4520 | pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; | |
4521 | ||
c78679e8 DM |
4522 | if (nla_put(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix)) |
4523 | goto nla_put_failure; | |
1da177e4 LT |
4524 | ci.preferred_time = ntohl(pinfo->prefered); |
4525 | ci.valid_time = ntohl(pinfo->valid); | |
c78679e8 DM |
4526 | if (nla_put(skb, PREFIX_CACHEINFO, sizeof(ci), &ci)) |
4527 | goto nla_put_failure; | |
6051e2f4 | 4528 | return nlmsg_end(skb, nlh); |
1da177e4 | 4529 | |
6051e2f4 | 4530 | nla_put_failure: |
26932566 PM |
4531 | nlmsg_cancel(skb, nlh); |
4532 | return -EMSGSIZE; | |
1da177e4 LT |
4533 | } |
4534 | ||
1ab1457c | 4535 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 LT |
4536 | struct prefix_info *pinfo) |
4537 | { | |
4538 | struct sk_buff *skb; | |
c346dca1 | 4539 | struct net *net = dev_net(idev->dev); |
8c384bfa | 4540 | int err = -ENOBUFS; |
1da177e4 | 4541 | |
339bf98f | 4542 | skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC); |
8c384bfa TG |
4543 | if (skb == NULL) |
4544 | goto errout; | |
4545 | ||
4546 | err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); | |
26932566 PM |
4547 | if (err < 0) { |
4548 | /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */ | |
4549 | WARN_ON(err == -EMSGSIZE); | |
4550 | kfree_skb(skb); | |
4551 | goto errout; | |
4552 | } | |
1ce85fe4 PNA |
4553 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); |
4554 | return; | |
8c384bfa TG |
4555 | errout: |
4556 | if (err < 0) | |
6fda7350 | 4557 | rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err); |
1da177e4 LT |
4558 | } |
4559 | ||
1ec047eb HFS |
4560 | static void update_valid_ll_addr_cnt(struct inet6_ifaddr *ifp, int count) |
4561 | { | |
4562 | write_lock_bh(&ifp->idev->lock); | |
4563 | spin_lock(&ifp->lock); | |
4564 | if (((ifp->flags & (IFA_F_PERMANENT|IFA_F_TENTATIVE|IFA_F_OPTIMISTIC| | |
4565 | IFA_F_DADFAILED)) == IFA_F_PERMANENT) && | |
4566 | (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) | |
4567 | ifp->idev->valid_ll_addr_cnt += count; | |
4568 | WARN_ON(ifp->idev->valid_ll_addr_cnt < 0); | |
4569 | spin_unlock(&ifp->lock); | |
4570 | write_unlock_bh(&ifp->idev->lock); | |
4571 | } | |
4572 | ||
1da177e4 LT |
4573 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) |
4574 | { | |
63998ac2 ND |
4575 | struct net *net = dev_net(ifp->idev->dev); |
4576 | ||
1da177e4 LT |
4577 | inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); |
4578 | ||
4579 | switch (event) { | |
4580 | case RTM_NEWADDR: | |
1ec047eb HFS |
4581 | update_valid_ll_addr_cnt(ifp, 1); |
4582 | ||
95c385b4 NH |
4583 | /* |
4584 | * If the address was optimistic | |
4585 | * we inserted the route at the start of | |
4586 | * our DAD process, so we don't need | |
4587 | * to do it again | |
4588 | */ | |
4589 | if (!(ifp->rt->rt6i_node)) | |
4590 | ip6_ins_rt(ifp->rt); | |
1da177e4 LT |
4591 | if (ifp->idev->cnf.forwarding) |
4592 | addrconf_join_anycast(ifp); | |
7996c799 | 4593 | if (!ipv6_addr_any(&ifp->peer_addr)) |
caeaba79 ND |
4594 | addrconf_prefix_route(&ifp->peer_addr, 128, |
4595 | ifp->idev->dev, 0, 0); | |
1da177e4 LT |
4596 | break; |
4597 | case RTM_DELADDR: | |
1ec047eb HFS |
4598 | update_valid_ll_addr_cnt(ifp, -1); |
4599 | ||
1da177e4 LT |
4600 | if (ifp->idev->cnf.forwarding) |
4601 | addrconf_leave_anycast(ifp); | |
4602 | addrconf_leave_solict(ifp->idev, &ifp->addr); | |
7996c799 | 4603 | if (!ipv6_addr_any(&ifp->peer_addr)) { |
caeaba79 ND |
4604 | struct rt6_info *rt; |
4605 | struct net_device *dev = ifp->idev->dev; | |
4606 | ||
4607 | rt = rt6_lookup(dev_net(dev), &ifp->peer_addr, NULL, | |
4608 | dev->ifindex, 1); | |
4609 | if (rt) { | |
4610 | dst_hold(&rt->dst); | |
4611 | if (ip6_del_rt(rt)) | |
4612 | dst_free(&rt->dst); | |
4613 | } | |
4614 | } | |
d8d1f30b | 4615 | dst_hold(&ifp->rt->dst); |
93fa159a | 4616 | |
73a8bd74 | 4617 | if (ip6_del_rt(ifp->rt)) |
d8d1f30b | 4618 | dst_free(&ifp->rt->dst); |
1da177e4 LT |
4619 | break; |
4620 | } | |
63998ac2 | 4621 | atomic_inc(&net->ipv6.dev_addr_genid); |
439677d7 | 4622 | rt_genid_bump_ipv6(net); |
1da177e4 LT |
4623 | } |
4624 | ||
4625 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) | |
4626 | { | |
8814c4b5 | 4627 | rcu_read_lock_bh(); |
1da177e4 LT |
4628 | if (likely(ifp->idev->dead == 0)) |
4629 | __ipv6_ifa_notify(event, ifp); | |
8814c4b5 | 4630 | rcu_read_unlock_bh(); |
1da177e4 LT |
4631 | } |
4632 | ||
4633 | #ifdef CONFIG_SYSCTL | |
4634 | ||
4635 | static | |
fe2c6338 | 4636 | int addrconf_sysctl_forward(struct ctl_table *ctl, int write, |
1da177e4 LT |
4637 | void __user *buffer, size_t *lenp, loff_t *ppos) |
4638 | { | |
4639 | int *valp = ctl->data; | |
4640 | int val = *valp; | |
88af182e | 4641 | loff_t pos = *ppos; |
fe2c6338 | 4642 | struct ctl_table lctl; |
1da177e4 LT |
4643 | int ret; |
4644 | ||
013d97e9 FR |
4645 | /* |
4646 | * ctl->data points to idev->cnf.forwarding, we should | |
4647 | * not modify it until we get the rtnl lock. | |
4648 | */ | |
4649 | lctl = *ctl; | |
4650 | lctl.data = &val; | |
4651 | ||
4652 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); | |
1da177e4 | 4653 | |
c8fecf22 | 4654 | if (write) |
b325fddb | 4655 | ret = addrconf_fixup_forwarding(ctl, valp, val); |
88af182e EB |
4656 | if (ret) |
4657 | *ppos = pos; | |
1ab1457c | 4658 | return ret; |
1da177e4 LT |
4659 | } |
4660 | ||
56d417b1 BH |
4661 | static void dev_disable_change(struct inet6_dev *idev) |
4662 | { | |
75538c2b CW |
4663 | struct netdev_notifier_info info; |
4664 | ||
56d417b1 BH |
4665 | if (!idev || !idev->dev) |
4666 | return; | |
4667 | ||
75538c2b | 4668 | netdev_notifier_info_init(&info, idev->dev); |
56d417b1 | 4669 | if (idev->cnf.disable_ipv6) |
75538c2b | 4670 | addrconf_notify(NULL, NETDEV_DOWN, &info); |
56d417b1 | 4671 | else |
75538c2b | 4672 | addrconf_notify(NULL, NETDEV_UP, &info); |
56d417b1 BH |
4673 | } |
4674 | ||
4675 | static void addrconf_disable_change(struct net *net, __s32 newf) | |
4676 | { | |
4677 | struct net_device *dev; | |
4678 | struct inet6_dev *idev; | |
4679 | ||
c6d14c84 ED |
4680 | rcu_read_lock(); |
4681 | for_each_netdev_rcu(net, dev) { | |
56d417b1 BH |
4682 | idev = __in6_dev_get(dev); |
4683 | if (idev) { | |
4684 | int changed = (!idev->cnf.disable_ipv6) ^ (!newf); | |
4685 | idev->cnf.disable_ipv6 = newf; | |
4686 | if (changed) | |
4687 | dev_disable_change(idev); | |
4688 | } | |
56d417b1 | 4689 | } |
c6d14c84 | 4690 | rcu_read_unlock(); |
56d417b1 BH |
4691 | } |
4692 | ||
013d97e9 | 4693 | static int addrconf_disable_ipv6(struct ctl_table *table, int *p, int newf) |
56d417b1 BH |
4694 | { |
4695 | struct net *net; | |
013d97e9 FR |
4696 | int old; |
4697 | ||
4698 | if (!rtnl_trylock()) | |
4699 | return restart_syscall(); | |
56d417b1 BH |
4700 | |
4701 | net = (struct net *)table->extra2; | |
013d97e9 FR |
4702 | old = *p; |
4703 | *p = newf; | |
56d417b1 | 4704 | |
013d97e9 FR |
4705 | if (p == &net->ipv6.devconf_dflt->disable_ipv6) { |
4706 | rtnl_unlock(); | |
56d417b1 | 4707 | return 0; |
88af182e | 4708 | } |
56d417b1 BH |
4709 | |
4710 | if (p == &net->ipv6.devconf_all->disable_ipv6) { | |
56d417b1 BH |
4711 | net->ipv6.devconf_dflt->disable_ipv6 = newf; |
4712 | addrconf_disable_change(net, newf); | |
013d97e9 | 4713 | } else if ((!newf) ^ (!old)) |
56d417b1 BH |
4714 | dev_disable_change((struct inet6_dev *)table->extra1); |
4715 | ||
4716 | rtnl_unlock(); | |
4717 | return 0; | |
4718 | } | |
4719 | ||
4720 | static | |
fe2c6338 | 4721 | int addrconf_sysctl_disable(struct ctl_table *ctl, int write, |
56d417b1 BH |
4722 | void __user *buffer, size_t *lenp, loff_t *ppos) |
4723 | { | |
4724 | int *valp = ctl->data; | |
4725 | int val = *valp; | |
88af182e | 4726 | loff_t pos = *ppos; |
fe2c6338 | 4727 | struct ctl_table lctl; |
56d417b1 BH |
4728 | int ret; |
4729 | ||
013d97e9 FR |
4730 | /* |
4731 | * ctl->data points to idev->cnf.disable_ipv6, we should | |
4732 | * not modify it until we get the rtnl lock. | |
4733 | */ | |
4734 | lctl = *ctl; | |
4735 | lctl.data = &val; | |
4736 | ||
4737 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); | |
56d417b1 BH |
4738 | |
4739 | if (write) | |
4740 | ret = addrconf_disable_ipv6(ctl, valp, val); | |
88af182e EB |
4741 | if (ret) |
4742 | *ppos = pos; | |
56d417b1 BH |
4743 | return ret; |
4744 | } | |
4745 | ||
c92d5491 | 4746 | static |
4747 | int addrconf_sysctl_proxy_ndp(struct ctl_table *ctl, int write, | |
4748 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
4749 | { | |
4750 | int *valp = ctl->data; | |
4751 | int ret; | |
4752 | int old, new; | |
4753 | ||
4754 | old = *valp; | |
4755 | ret = proc_dointvec(ctl, write, buffer, lenp, ppos); | |
4756 | new = *valp; | |
4757 | ||
4758 | if (write && old != new) { | |
4759 | struct net *net = ctl->extra2; | |
4760 | ||
4761 | if (!rtnl_trylock()) | |
4762 | return restart_syscall(); | |
4763 | ||
4764 | if (valp == &net->ipv6.devconf_dflt->proxy_ndp) | |
4765 | inet6_netconf_notify_devconf(net, NETCONFA_PROXY_NEIGH, | |
4766 | NETCONFA_IFINDEX_DEFAULT, | |
4767 | net->ipv6.devconf_dflt); | |
4768 | else if (valp == &net->ipv6.devconf_all->proxy_ndp) | |
4769 | inet6_netconf_notify_devconf(net, NETCONFA_PROXY_NEIGH, | |
4770 | NETCONFA_IFINDEX_ALL, | |
4771 | net->ipv6.devconf_all); | |
4772 | else { | |
4773 | struct inet6_dev *idev = ctl->extra1; | |
4774 | ||
4775 | inet6_netconf_notify_devconf(net, NETCONFA_PROXY_NEIGH, | |
4776 | idev->dev->ifindex, | |
4777 | &idev->cnf); | |
4778 | } | |
4779 | rtnl_unlock(); | |
4780 | } | |
4781 | ||
4782 | return ret; | |
4783 | } | |
4784 | ||
4785 | ||
1da177e4 LT |
4786 | static struct addrconf_sysctl_table |
4787 | { | |
4788 | struct ctl_table_header *sysctl_header; | |
fe2c6338 | 4789 | struct ctl_table addrconf_vars[DEVCONF_MAX+1]; |
ab32ea5d | 4790 | } addrconf_sysctl __read_mostly = { |
1da177e4 LT |
4791 | .sysctl_header = NULL, |
4792 | .addrconf_vars = { | |
1ab1457c | 4793 | { |
e21e8467 SH |
4794 | .procname = "forwarding", |
4795 | .data = &ipv6_devconf.forwarding, | |
4796 | .maxlen = sizeof(int), | |
4797 | .mode = 0644, | |
4798 | .proc_handler = addrconf_sysctl_forward, | |
1da177e4 LT |
4799 | }, |
4800 | { | |
e21e8467 SH |
4801 | .procname = "hop_limit", |
4802 | .data = &ipv6_devconf.hop_limit, | |
4803 | .maxlen = sizeof(int), | |
4804 | .mode = 0644, | |
4805 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4806 | }, |
4807 | { | |
e21e8467 SH |
4808 | .procname = "mtu", |
4809 | .data = &ipv6_devconf.mtu6, | |
4810 | .maxlen = sizeof(int), | |
4811 | .mode = 0644, | |
4812 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4813 | }, |
4814 | { | |
e21e8467 SH |
4815 | .procname = "accept_ra", |
4816 | .data = &ipv6_devconf.accept_ra, | |
4817 | .maxlen = sizeof(int), | |
4818 | .mode = 0644, | |
4819 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4820 | }, |
4821 | { | |
e21e8467 SH |
4822 | .procname = "accept_redirects", |
4823 | .data = &ipv6_devconf.accept_redirects, | |
4824 | .maxlen = sizeof(int), | |
4825 | .mode = 0644, | |
4826 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4827 | }, |
4828 | { | |
e21e8467 SH |
4829 | .procname = "autoconf", |
4830 | .data = &ipv6_devconf.autoconf, | |
4831 | .maxlen = sizeof(int), | |
4832 | .mode = 0644, | |
4833 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4834 | }, |
4835 | { | |
e21e8467 SH |
4836 | .procname = "dad_transmits", |
4837 | .data = &ipv6_devconf.dad_transmits, | |
4838 | .maxlen = sizeof(int), | |
4839 | .mode = 0644, | |
4840 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4841 | }, |
4842 | { | |
e21e8467 SH |
4843 | .procname = "router_solicitations", |
4844 | .data = &ipv6_devconf.rtr_solicits, | |
4845 | .maxlen = sizeof(int), | |
4846 | .mode = 0644, | |
4847 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4848 | }, |
4849 | { | |
e21e8467 SH |
4850 | .procname = "router_solicitation_interval", |
4851 | .data = &ipv6_devconf.rtr_solicit_interval, | |
4852 | .maxlen = sizeof(int), | |
4853 | .mode = 0644, | |
4854 | .proc_handler = proc_dointvec_jiffies, | |
1da177e4 LT |
4855 | }, |
4856 | { | |
e21e8467 SH |
4857 | .procname = "router_solicitation_delay", |
4858 | .data = &ipv6_devconf.rtr_solicit_delay, | |
4859 | .maxlen = sizeof(int), | |
4860 | .mode = 0644, | |
4861 | .proc_handler = proc_dointvec_jiffies, | |
1da177e4 LT |
4862 | }, |
4863 | { | |
e21e8467 SH |
4864 | .procname = "force_mld_version", |
4865 | .data = &ipv6_devconf.force_mld_version, | |
4866 | .maxlen = sizeof(int), | |
4867 | .mode = 0644, | |
4868 | .proc_handler = proc_dointvec, | |
1da177e4 | 4869 | }, |
fc4eba58 HFS |
4870 | { |
4871 | .procname = "mldv1_unsolicited_report_interval", | |
4872 | .data = | |
4873 | &ipv6_devconf.mldv1_unsolicited_report_interval, | |
4874 | .maxlen = sizeof(int), | |
4875 | .mode = 0644, | |
4876 | .proc_handler = proc_dointvec_ms_jiffies, | |
4877 | }, | |
4878 | { | |
4879 | .procname = "mldv2_unsolicited_report_interval", | |
4880 | .data = | |
4881 | &ipv6_devconf.mldv2_unsolicited_report_interval, | |
4882 | .maxlen = sizeof(int), | |
4883 | .mode = 0644, | |
4884 | .proc_handler = proc_dointvec_ms_jiffies, | |
4885 | }, | |
1da177e4 | 4886 | { |
e21e8467 SH |
4887 | .procname = "use_tempaddr", |
4888 | .data = &ipv6_devconf.use_tempaddr, | |
4889 | .maxlen = sizeof(int), | |
4890 | .mode = 0644, | |
4891 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4892 | }, |
4893 | { | |
e21e8467 SH |
4894 | .procname = "temp_valid_lft", |
4895 | .data = &ipv6_devconf.temp_valid_lft, | |
4896 | .maxlen = sizeof(int), | |
4897 | .mode = 0644, | |
4898 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4899 | }, |
4900 | { | |
e21e8467 SH |
4901 | .procname = "temp_prefered_lft", |
4902 | .data = &ipv6_devconf.temp_prefered_lft, | |
4903 | .maxlen = sizeof(int), | |
4904 | .mode = 0644, | |
4905 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4906 | }, |
4907 | { | |
e21e8467 SH |
4908 | .procname = "regen_max_retry", |
4909 | .data = &ipv6_devconf.regen_max_retry, | |
4910 | .maxlen = sizeof(int), | |
4911 | .mode = 0644, | |
4912 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
4913 | }, |
4914 | { | |
e21e8467 SH |
4915 | .procname = "max_desync_factor", |
4916 | .data = &ipv6_devconf.max_desync_factor, | |
4917 | .maxlen = sizeof(int), | |
4918 | .mode = 0644, | |
4919 | .proc_handler = proc_dointvec, | |
1da177e4 | 4920 | }, |
1da177e4 | 4921 | { |
e21e8467 SH |
4922 | .procname = "max_addresses", |
4923 | .data = &ipv6_devconf.max_addresses, | |
4924 | .maxlen = sizeof(int), | |
4925 | .mode = 0644, | |
4926 | .proc_handler = proc_dointvec, | |
1da177e4 | 4927 | }, |
65f5c7c1 | 4928 | { |
e21e8467 SH |
4929 | .procname = "accept_ra_defrtr", |
4930 | .data = &ipv6_devconf.accept_ra_defrtr, | |
4931 | .maxlen = sizeof(int), | |
4932 | .mode = 0644, | |
4933 | .proc_handler = proc_dointvec, | |
65f5c7c1 | 4934 | }, |
c4fd30eb | 4935 | { |
e21e8467 SH |
4936 | .procname = "accept_ra_pinfo", |
4937 | .data = &ipv6_devconf.accept_ra_pinfo, | |
4938 | .maxlen = sizeof(int), | |
4939 | .mode = 0644, | |
4940 | .proc_handler = proc_dointvec, | |
c4fd30eb | 4941 | }, |
930d6ff2 YH |
4942 | #ifdef CONFIG_IPV6_ROUTER_PREF |
4943 | { | |
e21e8467 SH |
4944 | .procname = "accept_ra_rtr_pref", |
4945 | .data = &ipv6_devconf.accept_ra_rtr_pref, | |
4946 | .maxlen = sizeof(int), | |
4947 | .mode = 0644, | |
4948 | .proc_handler = proc_dointvec, | |
930d6ff2 | 4949 | }, |
52e16356 | 4950 | { |
e21e8467 SH |
4951 | .procname = "router_probe_interval", |
4952 | .data = &ipv6_devconf.rtr_probe_interval, | |
4953 | .maxlen = sizeof(int), | |
4954 | .mode = 0644, | |
4955 | .proc_handler = proc_dointvec_jiffies, | |
52e16356 | 4956 | }, |
fa03ef38 | 4957 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 | 4958 | { |
e21e8467 SH |
4959 | .procname = "accept_ra_rt_info_max_plen", |
4960 | .data = &ipv6_devconf.accept_ra_rt_info_max_plen, | |
4961 | .maxlen = sizeof(int), | |
4962 | .mode = 0644, | |
4963 | .proc_handler = proc_dointvec, | |
09c884d4 YH |
4964 | }, |
4965 | #endif | |
930d6ff2 | 4966 | #endif |
fbea49e1 | 4967 | { |
e21e8467 SH |
4968 | .procname = "proxy_ndp", |
4969 | .data = &ipv6_devconf.proxy_ndp, | |
4970 | .maxlen = sizeof(int), | |
4971 | .mode = 0644, | |
c92d5491 | 4972 | .proc_handler = addrconf_sysctl_proxy_ndp, |
fbea49e1 | 4973 | }, |
0bcbc926 | 4974 | { |
e21e8467 SH |
4975 | .procname = "accept_source_route", |
4976 | .data = &ipv6_devconf.accept_source_route, | |
4977 | .maxlen = sizeof(int), | |
4978 | .mode = 0644, | |
4979 | .proc_handler = proc_dointvec, | |
0bcbc926 | 4980 | }, |
95c385b4 NH |
4981 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
4982 | { | |
e21e8467 SH |
4983 | .procname = "optimistic_dad", |
4984 | .data = &ipv6_devconf.optimistic_dad, | |
4985 | .maxlen = sizeof(int), | |
4986 | .mode = 0644, | |
4987 | .proc_handler = proc_dointvec, | |
95c385b4 NH |
4988 | |
4989 | }, | |
7bc570c8 YH |
4990 | #endif |
4991 | #ifdef CONFIG_IPV6_MROUTE | |
4992 | { | |
e21e8467 SH |
4993 | .procname = "mc_forwarding", |
4994 | .data = &ipv6_devconf.mc_forwarding, | |
4995 | .maxlen = sizeof(int), | |
4996 | .mode = 0444, | |
4997 | .proc_handler = proc_dointvec, | |
7bc570c8 | 4998 | }, |
95c385b4 | 4999 | #endif |
778d80be | 5000 | { |
e21e8467 SH |
5001 | .procname = "disable_ipv6", |
5002 | .data = &ipv6_devconf.disable_ipv6, | |
5003 | .maxlen = sizeof(int), | |
5004 | .mode = 0644, | |
5005 | .proc_handler = addrconf_sysctl_disable, | |
778d80be | 5006 | }, |
1b34be74 | 5007 | { |
e21e8467 SH |
5008 | .procname = "accept_dad", |
5009 | .data = &ipv6_devconf.accept_dad, | |
5010 | .maxlen = sizeof(int), | |
5011 | .mode = 0644, | |
5012 | .proc_handler = proc_dointvec, | |
1b34be74 | 5013 | }, |
f7734fdf | 5014 | { |
f7734fdf OP |
5015 | .procname = "force_tllao", |
5016 | .data = &ipv6_devconf.force_tllao, | |
5017 | .maxlen = sizeof(int), | |
5018 | .mode = 0644, | |
5019 | .proc_handler = proc_dointvec | |
5020 | }, | |
5cb04436 HFS |
5021 | { |
5022 | .procname = "ndisc_notify", | |
5023 | .data = &ipv6_devconf.ndisc_notify, | |
5024 | .maxlen = sizeof(int), | |
5025 | .mode = 0644, | |
5026 | .proc_handler = proc_dointvec | |
5027 | }, | |
b800c3b9 HFS |
5028 | { |
5029 | .procname = "suppress_frag_ndisc", | |
5030 | .data = &ipv6_devconf.suppress_frag_ndisc, | |
5031 | .maxlen = sizeof(int), | |
5032 | .mode = 0644, | |
5033 | .proc_handler = proc_dointvec | |
5034 | }, | |
1da177e4 | 5035 | { |
f8572d8f | 5036 | /* sentinel */ |
1da177e4 LT |
5037 | } |
5038 | }, | |
1da177e4 LT |
5039 | }; |
5040 | ||
bff16c2f | 5041 | static int __addrconf_sysctl_register(struct net *net, char *dev_name, |
f8572d8f | 5042 | struct inet6_dev *idev, struct ipv6_devconf *p) |
1da177e4 LT |
5043 | { |
5044 | int i; | |
1da177e4 | 5045 | struct addrconf_sysctl_table *t; |
6105e293 | 5046 | char path[sizeof("net/ipv6/conf/") + IFNAMSIZ]; |
1dab6222 | 5047 | |
af879cc7 | 5048 | t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL); |
1da177e4 | 5049 | if (t == NULL) |
f68635e6 PE |
5050 | goto out; |
5051 | ||
bcdd553f | 5052 | for (i = 0; t->addrconf_vars[i].data; i++) { |
e21e8467 | 5053 | t->addrconf_vars[i].data += (char *)p - (char *)&ipv6_devconf; |
1da177e4 | 5054 | t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */ |
bff16c2f | 5055 | t->addrconf_vars[i].extra2 = net; |
1da177e4 | 5056 | } |
1da177e4 | 5057 | |
6105e293 | 5058 | snprintf(path, sizeof(path), "net/ipv6/conf/%s", dev_name); |
1da177e4 | 5059 | |
6105e293 | 5060 | t->sysctl_header = register_net_sysctl(net, path, t->addrconf_vars); |
1da177e4 | 5061 | if (t->sysctl_header == NULL) |
6105e293 | 5062 | goto free; |
f68635e6 PE |
5063 | |
5064 | p->sysctl = t; | |
95897312 | 5065 | return 0; |
1da177e4 | 5066 | |
f68635e6 | 5067 | free: |
1da177e4 | 5068 | kfree(t); |
f68635e6 | 5069 | out: |
95897312 | 5070 | return -ENOBUFS; |
1da177e4 LT |
5071 | } |
5072 | ||
408c4768 PE |
5073 | static void __addrconf_sysctl_unregister(struct ipv6_devconf *p) |
5074 | { | |
5075 | struct addrconf_sysctl_table *t; | |
5076 | ||
5077 | if (p->sysctl == NULL) | |
5078 | return; | |
5079 | ||
5080 | t = p->sysctl; | |
5081 | p->sysctl = NULL; | |
ff538818 | 5082 | unregister_net_sysctl_table(t->sysctl_header); |
408c4768 PE |
5083 | kfree(t); |
5084 | } | |
5085 | ||
f52295a9 PE |
5086 | static void addrconf_sysctl_register(struct inet6_dev *idev) |
5087 | { | |
73af614a | 5088 | neigh_sysctl_register(idev->dev, idev->nd_parms, |
f8572d8f | 5089 | &ndisc_ifinfo_sysctl_change); |
c346dca1 | 5090 | __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name, |
f8572d8f | 5091 | idev, &idev->cnf); |
f52295a9 PE |
5092 | } |
5093 | ||
408c4768 | 5094 | static void addrconf_sysctl_unregister(struct inet6_dev *idev) |
1da177e4 | 5095 | { |
408c4768 PE |
5096 | __addrconf_sysctl_unregister(&idev->cnf); |
5097 | neigh_sysctl_unregister(idev->nd_parms); | |
1da177e4 LT |
5098 | } |
5099 | ||
5100 | ||
5101 | #endif | |
5102 | ||
2c8c1e72 | 5103 | static int __net_init addrconf_init_net(struct net *net) |
e0da5a48 | 5104 | { |
a79ca223 | 5105 | int err = -ENOMEM; |
e0da5a48 PE |
5106 | struct ipv6_devconf *all, *dflt; |
5107 | ||
a79ca223 HZ |
5108 | all = kmemdup(&ipv6_devconf, sizeof(ipv6_devconf), GFP_KERNEL); |
5109 | if (all == NULL) | |
5110 | goto err_alloc_all; | |
e0da5a48 | 5111 | |
a79ca223 HZ |
5112 | dflt = kmemdup(&ipv6_devconf_dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL); |
5113 | if (dflt == NULL) | |
5114 | goto err_alloc_dflt; | |
e0da5a48 | 5115 | |
a79ca223 HZ |
5116 | /* these will be inherited by all namespaces */ |
5117 | dflt->autoconf = ipv6_defaults.autoconf; | |
5118 | dflt->disable_ipv6 = ipv6_defaults.disable_ipv6; | |
e0da5a48 PE |
5119 | |
5120 | net->ipv6.devconf_all = all; | |
5121 | net->ipv6.devconf_dflt = dflt; | |
5122 | ||
5123 | #ifdef CONFIG_SYSCTL | |
f8572d8f | 5124 | err = __addrconf_sysctl_register(net, "all", NULL, all); |
e0da5a48 PE |
5125 | if (err < 0) |
5126 | goto err_reg_all; | |
5127 | ||
f8572d8f | 5128 | err = __addrconf_sysctl_register(net, "default", NULL, dflt); |
e0da5a48 PE |
5129 | if (err < 0) |
5130 | goto err_reg_dflt; | |
5131 | #endif | |
5132 | return 0; | |
5133 | ||
5134 | #ifdef CONFIG_SYSCTL | |
5135 | err_reg_dflt: | |
5136 | __addrconf_sysctl_unregister(all); | |
5137 | err_reg_all: | |
5138 | kfree(dflt); | |
5139 | #endif | |
5140 | err_alloc_dflt: | |
5141 | kfree(all); | |
5142 | err_alloc_all: | |
5143 | return err; | |
5144 | } | |
5145 | ||
2c8c1e72 | 5146 | static void __net_exit addrconf_exit_net(struct net *net) |
e0da5a48 PE |
5147 | { |
5148 | #ifdef CONFIG_SYSCTL | |
5149 | __addrconf_sysctl_unregister(net->ipv6.devconf_dflt); | |
5150 | __addrconf_sysctl_unregister(net->ipv6.devconf_all); | |
5151 | #endif | |
09ad9bc7 | 5152 | if (!net_eq(net, &init_net)) { |
e0da5a48 PE |
5153 | kfree(net->ipv6.devconf_dflt); |
5154 | kfree(net->ipv6.devconf_all); | |
5155 | } | |
5156 | } | |
5157 | ||
5158 | static struct pernet_operations addrconf_ops = { | |
5159 | .init = addrconf_init_net, | |
5160 | .exit = addrconf_exit_net, | |
5161 | }; | |
5162 | ||
b382b191 TG |
5163 | static struct rtnl_af_ops inet6_ops = { |
5164 | .family = AF_INET6, | |
5165 | .fill_link_af = inet6_fill_link_af, | |
5166 | .get_link_af_size = inet6_get_link_af_size, | |
f53adae4 | 5167 | .set_link_af = inet6_set_link_af, |
b382b191 TG |
5168 | }; |
5169 | ||
1da177e4 LT |
5170 | /* |
5171 | * Init / cleanup code | |
5172 | */ | |
5173 | ||
5174 | int __init addrconf_init(void) | |
5175 | { | |
c2e21293 | 5176 | int i, err; |
2a8cc6c8 | 5177 | |
e21e8467 SH |
5178 | err = ipv6_addr_label_init(); |
5179 | if (err < 0) { | |
f3213831 JP |
5180 | pr_crit("%s: cannot initialize default policy table: %d\n", |
5181 | __func__, err); | |
2cc6d2bf | 5182 | goto out; |
2a8cc6c8 | 5183 | } |
1da177e4 | 5184 | |
2cc6d2bf NH |
5185 | err = register_pernet_subsys(&addrconf_ops); |
5186 | if (err < 0) | |
5187 | goto out_addrlabel; | |
e0da5a48 | 5188 | |
1da177e4 LT |
5189 | /* The addrconf netdev notifier requires that loopback_dev |
5190 | * has it's ipv6 private information allocated and setup | |
5191 | * before it can bring up and give link-local addresses | |
5192 | * to other devices which are up. | |
5193 | * | |
5194 | * Unfortunately, loopback_dev is not necessarily the first | |
5195 | * entry in the global dev_base list of net devices. In fact, | |
5196 | * it is likely to be the very last entry on that list. | |
5197 | * So this causes the notifier registry below to try and | |
5198 | * give link-local addresses to all devices besides loopback_dev | |
5199 | * first, then loopback_dev, which cases all the non-loopback_dev | |
5200 | * devices to fail to get a link-local address. | |
5201 | * | |
5202 | * So, as a temporary fix, allocate the ipv6 structure for | |
5203 | * loopback_dev first by hand. | |
5204 | * Longer term, all of the dependencies ipv6 has upon the loopback | |
5205 | * device and it being up should be removed. | |
5206 | */ | |
5207 | rtnl_lock(); | |
2774c7ab | 5208 | if (!ipv6_add_dev(init_net.loopback_dev)) |
1da177e4 LT |
5209 | err = -ENOMEM; |
5210 | rtnl_unlock(); | |
5211 | if (err) | |
e0da5a48 | 5212 | goto errlo; |
1da177e4 | 5213 | |
c2e21293 | 5214 | for (i = 0; i < IN6_ADDR_HSIZE; i++) |
5215 | INIT_HLIST_HEAD(&inet6_addr_lst[i]); | |
5216 | ||
1da177e4 LT |
5217 | register_netdevice_notifier(&ipv6_dev_notf); |
5218 | ||
1da177e4 | 5219 | addrconf_verify(0); |
c127ea2c | 5220 | |
3678a9d8 | 5221 | rtnl_af_register(&inet6_ops); |
b382b191 | 5222 | |
c7ac8679 GR |
5223 | err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo, |
5224 | NULL); | |
c127ea2c TG |
5225 | if (err < 0) |
5226 | goto errout; | |
5227 | ||
5228 | /* Only the first call to __rtnl_register can fail */ | |
c7ac8679 GR |
5229 | __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL, NULL); |
5230 | __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL, NULL); | |
5231 | __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, | |
5232 | inet6_dump_ifaddr, NULL); | |
5233 | __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, | |
5234 | inet6_dump_ifmcaddr, NULL); | |
5235 | __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, | |
5236 | inet6_dump_ifacaddr, NULL); | |
76f8f6cb | 5237 | __rtnl_register(PF_INET6, RTM_GETNETCONF, inet6_netconf_get_devconf, |
7a674200 | 5238 | inet6_netconf_dump_devconf, NULL); |
c127ea2c | 5239 | |
2a8cc6c8 YH |
5240 | ipv6_addr_label_rtnl_register(); |
5241 | ||
1da177e4 | 5242 | return 0; |
c127ea2c | 5243 | errout: |
b382b191 | 5244 | rtnl_af_unregister(&inet6_ops); |
c127ea2c | 5245 | unregister_netdevice_notifier(&ipv6_dev_notf); |
e0da5a48 PE |
5246 | errlo: |
5247 | unregister_pernet_subsys(&addrconf_ops); | |
2cc6d2bf NH |
5248 | out_addrlabel: |
5249 | ipv6_addr_label_cleanup(); | |
5250 | out: | |
c127ea2c | 5251 | return err; |
1da177e4 LT |
5252 | } |
5253 | ||
09f7709f | 5254 | void addrconf_cleanup(void) |
1da177e4 | 5255 | { |
176c39af | 5256 | struct net_device *dev; |
1da177e4 LT |
5257 | int i; |
5258 | ||
5259 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
e0da5a48 | 5260 | unregister_pernet_subsys(&addrconf_ops); |
2cc6d2bf | 5261 | ipv6_addr_label_cleanup(); |
1da177e4 LT |
5262 | |
5263 | rtnl_lock(); | |
5264 | ||
b382b191 TG |
5265 | __rtnl_af_unregister(&inet6_ops); |
5266 | ||
176c39af DL |
5267 | /* clean dev list */ |
5268 | for_each_netdev(&init_net, dev) { | |
5269 | if (__in6_dev_get(dev) == NULL) | |
5270 | continue; | |
5271 | addrconf_ifdown(dev, 1); | |
5272 | } | |
5273 | addrconf_ifdown(init_net.loopback_dev, 2); | |
5274 | ||
1da177e4 LT |
5275 | /* |
5276 | * Check hash table. | |
5277 | */ | |
5c578aed | 5278 | spin_lock_bh(&addrconf_hash_lock); |
c2e21293 | 5279 | for (i = 0; i < IN6_ADDR_HSIZE; i++) |
5280 | WARN_ON(!hlist_empty(&inet6_addr_lst[i])); | |
5c578aed | 5281 | spin_unlock_bh(&addrconf_hash_lock); |
1da177e4 LT |
5282 | |
5283 | del_timer(&addr_chk_timer); | |
1da177e4 | 5284 | rtnl_unlock(); |
1da177e4 | 5285 | } |