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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 | |
a317a2f1 | 111 | static int addrconf_sysctl_register(struct inet6_dev *idev); |
408c4768 PE |
112 | static void addrconf_sysctl_unregister(struct inet6_dev *idev); |
113 | #else | |
a317a2f1 | 114 | static inline int addrconf_sysctl_register(struct inet6_dev *idev) |
408c4768 | 115 | { |
a317a2f1 | 116 | return 0; |
408c4768 PE |
117 | } |
118 | ||
119 | static inline void addrconf_sysctl_unregister(struct inet6_dev *idev) | |
120 | { | |
121 | } | |
1da177e4 LT |
122 | #endif |
123 | ||
eb7e0575 SD |
124 | static void __ipv6_regen_rndid(struct inet6_dev *idev); |
125 | static void __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr); | |
1da177e4 | 126 | static void ipv6_regen_rndid(unsigned long data); |
1da177e4 | 127 | |
1b34be74 | 128 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev); |
1da177e4 LT |
129 | static int ipv6_count_addresses(struct inet6_dev *idev); |
130 | ||
131 | /* | |
132 | * Configured unicast address hash table | |
133 | */ | |
c2e21293 | 134 | static struct hlist_head inet6_addr_lst[IN6_ADDR_HSIZE]; |
5c578aed | 135 | static DEFINE_SPINLOCK(addrconf_hash_lock); |
1da177e4 | 136 | |
c15b1cca HFS |
137 | static void addrconf_verify(void); |
138 | static void addrconf_verify_rtnl(void); | |
139 | static void addrconf_verify_work(struct work_struct *); | |
1da177e4 | 140 | |
c15b1cca HFS |
141 | static struct workqueue_struct *addrconf_wq; |
142 | static DECLARE_DELAYED_WORK(addr_chk_work, addrconf_verify_work); | |
1da177e4 LT |
143 | |
144 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp); | |
145 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp); | |
146 | ||
93d9b7d7 JP |
147 | static void addrconf_type_change(struct net_device *dev, |
148 | unsigned long event); | |
1da177e4 LT |
149 | static int addrconf_ifdown(struct net_device *dev, int how); |
150 | ||
21caa662 RK |
151 | static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx, |
152 | int plen, | |
153 | const struct net_device *dev, | |
154 | u32 flags, u32 noflags); | |
155 | ||
cf22f9a2 | 156 | static void addrconf_dad_start(struct inet6_ifaddr *ifp); |
c15b1cca | 157 | static void addrconf_dad_work(struct work_struct *w); |
1da177e4 | 158 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp); |
c5e33bdd | 159 | static void addrconf_dad_run(struct inet6_dev *idev); |
1da177e4 LT |
160 | static void addrconf_rs_timer(unsigned long data); |
161 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
162 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
163 | ||
1ab1457c | 164 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 | 165 | struct prefix_info *pinfo); |
3e81c6da DM |
166 | static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
167 | struct net_device *dev); | |
1da177e4 | 168 | |
888c848e | 169 | static struct ipv6_devconf ipv6_devconf __read_mostly = { |
1da177e4 LT |
170 | .forwarding = 0, |
171 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
172 | .mtu6 = IPV6_MIN_MTU, | |
173 | .accept_ra = 1, | |
174 | .accept_redirects = 1, | |
175 | .autoconf = 1, | |
176 | .force_mld_version = 0, | |
fc4eba58 HFS |
177 | .mldv1_unsolicited_report_interval = 10 * HZ, |
178 | .mldv2_unsolicited_report_interval = HZ, | |
1da177e4 LT |
179 | .dad_transmits = 1, |
180 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
181 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
182 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
67ba4152 | 183 | .use_tempaddr = 0, |
1da177e4 LT |
184 | .temp_valid_lft = TEMP_VALID_LIFETIME, |
185 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
186 | .regen_max_retry = REGEN_MAX_RETRY, | |
187 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
1da177e4 | 188 | .max_addresses = IPV6_MAX_ADDRESSES, |
65f5c7c1 | 189 | .accept_ra_defrtr = 1, |
d9333196 | 190 | .accept_ra_from_local = 0, |
c4fd30eb | 191 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
192 | #ifdef CONFIG_IPV6_ROUTER_PREF |
193 | .accept_ra_rtr_pref = 1, | |
52e16356 | 194 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
195 | #ifdef CONFIG_IPV6_ROUTE_INFO |
196 | .accept_ra_rt_info_max_plen = 0, | |
197 | #endif | |
930d6ff2 | 198 | #endif |
fbea49e1 | 199 | .proxy_ndp = 0, |
0bcbc926 | 200 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
778d80be | 201 | .disable_ipv6 = 0, |
1b34be74 | 202 | .accept_dad = 1, |
b800c3b9 | 203 | .suppress_frag_ndisc = 1, |
c2943f14 | 204 | .accept_ra_mtu = 1, |
1da177e4 LT |
205 | }; |
206 | ||
ab32ea5d | 207 | static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = { |
1da177e4 LT |
208 | .forwarding = 0, |
209 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
210 | .mtu6 = IPV6_MIN_MTU, | |
211 | .accept_ra = 1, | |
212 | .accept_redirects = 1, | |
213 | .autoconf = 1, | |
fc4eba58 HFS |
214 | .force_mld_version = 0, |
215 | .mldv1_unsolicited_report_interval = 10 * HZ, | |
216 | .mldv2_unsolicited_report_interval = HZ, | |
1da177e4 LT |
217 | .dad_transmits = 1, |
218 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
219 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
220 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
1da177e4 LT |
221 | .use_tempaddr = 0, |
222 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
223 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
224 | .regen_max_retry = REGEN_MAX_RETRY, | |
225 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
1da177e4 | 226 | .max_addresses = IPV6_MAX_ADDRESSES, |
65f5c7c1 | 227 | .accept_ra_defrtr = 1, |
d9333196 | 228 | .accept_ra_from_local = 0, |
c4fd30eb | 229 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
230 | #ifdef CONFIG_IPV6_ROUTER_PREF |
231 | .accept_ra_rtr_pref = 1, | |
52e16356 | 232 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
233 | #ifdef CONFIG_IPV6_ROUTE_INFO |
234 | .accept_ra_rt_info_max_plen = 0, | |
235 | #endif | |
930d6ff2 | 236 | #endif |
fbea49e1 | 237 | .proxy_ndp = 0, |
0bcbc926 | 238 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
778d80be | 239 | .disable_ipv6 = 0, |
1b34be74 | 240 | .accept_dad = 1, |
b800c3b9 | 241 | .suppress_frag_ndisc = 1, |
c2943f14 | 242 | .accept_ra_mtu = 1, |
1da177e4 LT |
243 | }; |
244 | ||
f24e3d65 | 245 | /* Check if a valid qdisc is available */ |
05297949 | 246 | static inline bool addrconf_qdisc_ok(const struct net_device *dev) |
f24e3d65 | 247 | { |
05297949 | 248 | return !qdisc_tx_is_noop(dev); |
f24e3d65 MC |
249 | } |
250 | ||
b7b1bfce | 251 | static void addrconf_del_rs_timer(struct inet6_dev *idev) |
1da177e4 | 252 | { |
b7b1bfce HFS |
253 | if (del_timer(&idev->rs_timer)) |
254 | __in6_dev_put(idev); | |
255 | } | |
256 | ||
c15b1cca | 257 | static void addrconf_del_dad_work(struct inet6_ifaddr *ifp) |
b7b1bfce | 258 | { |
c15b1cca | 259 | if (cancel_delayed_work(&ifp->dad_work)) |
1da177e4 LT |
260 | __in6_ifa_put(ifp); |
261 | } | |
262 | ||
b7b1bfce HFS |
263 | static void addrconf_mod_rs_timer(struct inet6_dev *idev, |
264 | unsigned long when) | |
265 | { | |
266 | if (!timer_pending(&idev->rs_timer)) | |
267 | in6_dev_hold(idev); | |
268 | mod_timer(&idev->rs_timer, jiffies + when); | |
269 | } | |
1da177e4 | 270 | |
c15b1cca HFS |
271 | static void addrconf_mod_dad_work(struct inet6_ifaddr *ifp, |
272 | unsigned long delay) | |
1da177e4 | 273 | { |
c15b1cca | 274 | if (!delayed_work_pending(&ifp->dad_work)) |
1da177e4 | 275 | in6_ifa_hold(ifp); |
c15b1cca | 276 | mod_delayed_work(addrconf_wq, &ifp->dad_work, delay); |
1da177e4 LT |
277 | } |
278 | ||
7f7d9a6b HX |
279 | static int snmp6_alloc_dev(struct inet6_dev *idev) |
280 | { | |
827da44c JS |
281 | int i; |
282 | ||
698365fa WC |
283 | idev->stats.ipv6 = alloc_percpu(struct ipstats_mib); |
284 | if (!idev->stats.ipv6) | |
7f7d9a6b | 285 | goto err_ip; |
827da44c JS |
286 | |
287 | for_each_possible_cpu(i) { | |
288 | struct ipstats_mib *addrconf_stats; | |
698365fa | 289 | addrconf_stats = per_cpu_ptr(idev->stats.ipv6, i); |
827da44c | 290 | u64_stats_init(&addrconf_stats->syncp); |
827da44c JS |
291 | } |
292 | ||
293 | ||
be281e55 ED |
294 | idev->stats.icmpv6dev = kzalloc(sizeof(struct icmpv6_mib_device), |
295 | GFP_KERNEL); | |
296 | if (!idev->stats.icmpv6dev) | |
7f7d9a6b | 297 | goto err_icmp; |
be281e55 ED |
298 | idev->stats.icmpv6msgdev = kzalloc(sizeof(struct icmpv6msg_mib_device), |
299 | GFP_KERNEL); | |
300 | if (!idev->stats.icmpv6msgdev) | |
14878f75 | 301 | goto err_icmpmsg; |
7f7d9a6b HX |
302 | |
303 | return 0; | |
304 | ||
14878f75 | 305 | err_icmpmsg: |
be281e55 | 306 | kfree(idev->stats.icmpv6dev); |
7f7d9a6b | 307 | err_icmp: |
698365fa | 308 | free_percpu(idev->stats.ipv6); |
7f7d9a6b | 309 | err_ip: |
aaf70ec7 | 310 | return -ENOMEM; |
7f7d9a6b HX |
311 | } |
312 | ||
8e5e8f30 | 313 | static struct inet6_dev *ipv6_add_dev(struct net_device *dev) |
1da177e4 LT |
314 | { |
315 | struct inet6_dev *ndev; | |
a317a2f1 | 316 | int err = -ENOMEM; |
1da177e4 LT |
317 | |
318 | ASSERT_RTNL(); | |
319 | ||
320 | if (dev->mtu < IPV6_MIN_MTU) | |
a317a2f1 | 321 | return ERR_PTR(-EINVAL); |
1da177e4 | 322 | |
1ab1457c | 323 | ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL); |
1ab1457c | 324 | if (ndev == NULL) |
a317a2f1 | 325 | return ERR_PTR(err); |
322f74a4 IO |
326 | |
327 | rwlock_init(&ndev->lock); | |
328 | ndev->dev = dev; | |
502a2ffd | 329 | INIT_LIST_HEAD(&ndev->addr_list); |
b7b1bfce HFS |
330 | setup_timer(&ndev->rs_timer, addrconf_rs_timer, |
331 | (unsigned long)ndev); | |
c346dca1 | 332 | memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf)); |
322f74a4 IO |
333 | ndev->cnf.mtu6 = dev->mtu; |
334 | ndev->cnf.sysctl = NULL; | |
335 | ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); | |
336 | if (ndev->nd_parms == NULL) { | |
337 | kfree(ndev); | |
a317a2f1 | 338 | return ERR_PTR(err); |
322f74a4 | 339 | } |
0187bdfb BH |
340 | if (ndev->cnf.forwarding) |
341 | dev_disable_lro(dev); | |
322f74a4 IO |
342 | /* We refer to the device */ |
343 | dev_hold(dev); | |
1da177e4 | 344 | |
322f74a4 | 345 | if (snmp6_alloc_dev(ndev) < 0) { |
ba3542e1 | 346 | ADBG(KERN_WARNING |
f3213831 | 347 | "%s: cannot allocate memory for statistics; dev=%s.\n", |
ba3542e1 | 348 | __func__, dev->name); |
322f74a4 | 349 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
8603e33d RL |
350 | dev_put(dev); |
351 | kfree(ndev); | |
a317a2f1 | 352 | return ERR_PTR(err); |
322f74a4 | 353 | } |
1da177e4 | 354 | |
322f74a4 | 355 | if (snmp6_register_dev(ndev) < 0) { |
ba3542e1 | 356 | ADBG(KERN_WARNING |
f3213831 | 357 | "%s: cannot create /proc/net/dev_snmp6/%s\n", |
ba3542e1 | 358 | __func__, dev->name); |
a317a2f1 | 359 | goto err_release; |
322f74a4 IO |
360 | } |
361 | ||
362 | /* One reference from device. We must do this before | |
363 | * we invoke __ipv6_regen_rndid(). | |
364 | */ | |
365 | in6_dev_hold(ndev); | |
1da177e4 | 366 | |
1b34be74 YH |
367 | if (dev->flags & (IFF_NOARP | IFF_LOOPBACK)) |
368 | ndev->cnf.accept_dad = -1; | |
369 | ||
07a93626 | 370 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
b077d7ab | 371 | if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) { |
f3213831 | 372 | pr_info("%s: Disabled Multicast RS\n", dev->name); |
b077d7ab YH |
373 | ndev->cnf.rtr_solicits = 0; |
374 | } | |
375 | #endif | |
376 | ||
372e6c8f | 377 | INIT_LIST_HEAD(&ndev->tempaddr_list); |
b24b8a24 | 378 | setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev); |
322f74a4 IO |
379 | if ((dev->flags&IFF_LOOPBACK) || |
380 | dev->type == ARPHRD_TUNNEL || | |
9625ed72 | 381 | dev->type == ARPHRD_TUNNEL6 || |
0be669bb | 382 | dev->type == ARPHRD_SIT || |
0be669bb | 383 | dev->type == ARPHRD_NONE) { |
322f74a4 IO |
384 | ndev->cnf.use_tempaddr = -1; |
385 | } else { | |
386 | in6_dev_hold(ndev); | |
387 | ipv6_regen_rndid((unsigned long) ndev); | |
388 | } | |
5d9efa7e | 389 | |
914faa14 | 390 | ndev->token = in6addr_any; |
1da177e4 | 391 | |
f24e3d65 | 392 | if (netif_running(dev) && addrconf_qdisc_ok(dev)) |
53aadcc9 HX |
393 | ndev->if_flags |= IF_READY; |
394 | ||
322f74a4 IO |
395 | ipv6_mc_init_dev(ndev); |
396 | ndev->tstamp = jiffies; | |
a317a2f1 WC |
397 | err = addrconf_sysctl_register(ndev); |
398 | if (err) { | |
399 | ipv6_mc_destroy_dev(ndev); | |
400 | del_timer(&ndev->regen_timer); | |
401 | goto err_release; | |
402 | } | |
30c4cf57 | 403 | /* protected by rtnl_lock */ |
cf778b00 | 404 | rcu_assign_pointer(dev->ip6_ptr, ndev); |
d88ae4cc | 405 | |
2c5e8933 HFS |
406 | /* Join interface-local all-node multicast group */ |
407 | ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allnodes); | |
408 | ||
d88ae4cc | 409 | /* Join all-node multicast group */ |
f3ee4010 | 410 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes); |
d88ae4cc | 411 | |
d6ddef9e | 412 | /* Join all-router multicast group if forwarding is set */ |
8b2aaede | 413 | if (ndev->cnf.forwarding && (dev->flags & IFF_MULTICAST)) |
d6ddef9e LW |
414 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
415 | ||
1da177e4 | 416 | return ndev; |
a317a2f1 WC |
417 | |
418 | err_release: | |
419 | neigh_parms_release(&nd_tbl, ndev->nd_parms); | |
420 | ndev->dead = 1; | |
421 | in6_dev_finish_destroy(ndev); | |
422 | return ERR_PTR(err); | |
1da177e4 LT |
423 | } |
424 | ||
8e5e8f30 | 425 | static struct inet6_dev *ipv6_find_idev(struct net_device *dev) |
1da177e4 LT |
426 | { |
427 | struct inet6_dev *idev; | |
428 | ||
429 | ASSERT_RTNL(); | |
430 | ||
e21e8467 SH |
431 | idev = __in6_dev_get(dev); |
432 | if (!idev) { | |
433 | idev = ipv6_add_dev(dev); | |
a317a2f1 | 434 | if (IS_ERR(idev)) |
1da177e4 LT |
435 | return NULL; |
436 | } | |
c5e33bdd | 437 | |
1da177e4 LT |
438 | if (dev->flags&IFF_UP) |
439 | ipv6_mc_up(idev); | |
440 | return idev; | |
441 | } | |
442 | ||
f3a1bfb1 ND |
443 | static int inet6_netconf_msgsize_devconf(int type) |
444 | { | |
445 | int size = NLMSG_ALIGN(sizeof(struct netconfmsg)) | |
446 | + nla_total_size(4); /* NETCONFA_IFINDEX */ | |
447 | ||
76f8f6cb ND |
448 | /* type -1 is used for ALL */ |
449 | if (type == -1 || type == NETCONFA_FORWARDING) | |
f3a1bfb1 | 450 | size += nla_total_size(4); |
b1afce95 | 451 | #ifdef CONFIG_IPV6_MROUTE |
d67b8c61 ND |
452 | if (type == -1 || type == NETCONFA_MC_FORWARDING) |
453 | size += nla_total_size(4); | |
b1afce95 | 454 | #endif |
c92d5491 | 455 | if (type == -1 || type == NETCONFA_PROXY_NEIGH) |
456 | size += nla_total_size(4); | |
f3a1bfb1 ND |
457 | |
458 | return size; | |
459 | } | |
460 | ||
461 | static int inet6_netconf_fill_devconf(struct sk_buff *skb, int ifindex, | |
462 | struct ipv6_devconf *devconf, u32 portid, | |
463 | u32 seq, int event, unsigned int flags, | |
464 | int type) | |
465 | { | |
466 | struct nlmsghdr *nlh; | |
467 | struct netconfmsg *ncm; | |
468 | ||
469 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct netconfmsg), | |
470 | flags); | |
471 | if (nlh == NULL) | |
472 | return -EMSGSIZE; | |
473 | ||
474 | ncm = nlmsg_data(nlh); | |
475 | ncm->ncm_family = AF_INET6; | |
476 | ||
477 | if (nla_put_s32(skb, NETCONFA_IFINDEX, ifindex) < 0) | |
478 | goto nla_put_failure; | |
479 | ||
76f8f6cb ND |
480 | /* type -1 is used for ALL */ |
481 | if ((type == -1 || type == NETCONFA_FORWARDING) && | |
f3a1bfb1 ND |
482 | nla_put_s32(skb, NETCONFA_FORWARDING, devconf->forwarding) < 0) |
483 | goto nla_put_failure; | |
b1afce95 | 484 | #ifdef CONFIG_IPV6_MROUTE |
d67b8c61 ND |
485 | if ((type == -1 || type == NETCONFA_MC_FORWARDING) && |
486 | nla_put_s32(skb, NETCONFA_MC_FORWARDING, | |
487 | devconf->mc_forwarding) < 0) | |
488 | goto nla_put_failure; | |
b1afce95 | 489 | #endif |
c92d5491 | 490 | if ((type == -1 || type == NETCONFA_PROXY_NEIGH) && |
491 | nla_put_s32(skb, NETCONFA_PROXY_NEIGH, devconf->proxy_ndp) < 0) | |
492 | goto nla_put_failure; | |
493 | ||
053c095a JB |
494 | nlmsg_end(skb, nlh); |
495 | return 0; | |
f3a1bfb1 ND |
496 | |
497 | nla_put_failure: | |
498 | nlmsg_cancel(skb, nlh); | |
499 | return -EMSGSIZE; | |
500 | } | |
501 | ||
d67b8c61 ND |
502 | void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex, |
503 | struct ipv6_devconf *devconf) | |
f3a1bfb1 ND |
504 | { |
505 | struct sk_buff *skb; | |
506 | int err = -ENOBUFS; | |
507 | ||
508 | skb = nlmsg_new(inet6_netconf_msgsize_devconf(type), GFP_ATOMIC); | |
509 | if (skb == NULL) | |
510 | goto errout; | |
511 | ||
512 | err = inet6_netconf_fill_devconf(skb, ifindex, devconf, 0, 0, | |
513 | RTM_NEWNETCONF, 0, type); | |
514 | if (err < 0) { | |
515 | /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */ | |
516 | WARN_ON(err == -EMSGSIZE); | |
517 | kfree_skb(skb); | |
518 | goto errout; | |
519 | } | |
520 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_NETCONF, NULL, GFP_ATOMIC); | |
521 | return; | |
522 | errout: | |
bd779028 | 523 | rtnl_set_sk_err(net, RTNLGRP_IPV6_NETCONF, err); |
f3a1bfb1 ND |
524 | } |
525 | ||
76f8f6cb ND |
526 | static const struct nla_policy devconf_ipv6_policy[NETCONFA_MAX+1] = { |
527 | [NETCONFA_IFINDEX] = { .len = sizeof(int) }, | |
528 | [NETCONFA_FORWARDING] = { .len = sizeof(int) }, | |
c92d5491 | 529 | [NETCONFA_PROXY_NEIGH] = { .len = sizeof(int) }, |
76f8f6cb ND |
530 | }; |
531 | ||
532 | static int inet6_netconf_get_devconf(struct sk_buff *in_skb, | |
661d2967 | 533 | struct nlmsghdr *nlh) |
76f8f6cb ND |
534 | { |
535 | struct net *net = sock_net(in_skb->sk); | |
536 | struct nlattr *tb[NETCONFA_MAX+1]; | |
537 | struct netconfmsg *ncm; | |
538 | struct sk_buff *skb; | |
539 | struct ipv6_devconf *devconf; | |
540 | struct inet6_dev *in6_dev; | |
541 | struct net_device *dev; | |
542 | int ifindex; | |
543 | int err; | |
544 | ||
545 | err = nlmsg_parse(nlh, sizeof(*ncm), tb, NETCONFA_MAX, | |
546 | devconf_ipv6_policy); | |
547 | if (err < 0) | |
548 | goto errout; | |
549 | ||
550 | err = EINVAL; | |
551 | if (!tb[NETCONFA_IFINDEX]) | |
552 | goto errout; | |
553 | ||
554 | ifindex = nla_get_s32(tb[NETCONFA_IFINDEX]); | |
555 | switch (ifindex) { | |
556 | case NETCONFA_IFINDEX_ALL: | |
557 | devconf = net->ipv6.devconf_all; | |
558 | break; | |
559 | case NETCONFA_IFINDEX_DEFAULT: | |
560 | devconf = net->ipv6.devconf_dflt; | |
561 | break; | |
562 | default: | |
563 | dev = __dev_get_by_index(net, ifindex); | |
564 | if (dev == NULL) | |
565 | goto errout; | |
566 | in6_dev = __in6_dev_get(dev); | |
567 | if (in6_dev == NULL) | |
568 | goto errout; | |
569 | devconf = &in6_dev->cnf; | |
570 | break; | |
571 | } | |
572 | ||
573 | err = -ENOBUFS; | |
574 | skb = nlmsg_new(inet6_netconf_msgsize_devconf(-1), GFP_ATOMIC); | |
575 | if (skb == NULL) | |
576 | goto errout; | |
577 | ||
578 | err = inet6_netconf_fill_devconf(skb, ifindex, devconf, | |
579 | NETLINK_CB(in_skb).portid, | |
580 | nlh->nlmsg_seq, RTM_NEWNETCONF, 0, | |
581 | -1); | |
582 | if (err < 0) { | |
583 | /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */ | |
584 | WARN_ON(err == -EMSGSIZE); | |
585 | kfree_skb(skb); | |
586 | goto errout; | |
587 | } | |
588 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); | |
589 | errout: | |
590 | return err; | |
591 | } | |
592 | ||
7a674200 ND |
593 | static int inet6_netconf_dump_devconf(struct sk_buff *skb, |
594 | struct netlink_callback *cb) | |
595 | { | |
596 | struct net *net = sock_net(skb->sk); | |
597 | int h, s_h; | |
598 | int idx, s_idx; | |
599 | struct net_device *dev; | |
600 | struct inet6_dev *idev; | |
601 | struct hlist_head *head; | |
602 | ||
603 | s_h = cb->args[0]; | |
604 | s_idx = idx = cb->args[1]; | |
605 | ||
606 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
607 | idx = 0; | |
608 | head = &net->dev_index_head[h]; | |
609 | rcu_read_lock(); | |
63998ac2 ND |
610 | cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^ |
611 | net->dev_base_seq; | |
7a674200 ND |
612 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
613 | if (idx < s_idx) | |
614 | goto cont; | |
615 | idev = __in6_dev_get(dev); | |
616 | if (!idev) | |
617 | goto cont; | |
618 | ||
619 | if (inet6_netconf_fill_devconf(skb, dev->ifindex, | |
620 | &idev->cnf, | |
621 | NETLINK_CB(cb->skb).portid, | |
622 | cb->nlh->nlmsg_seq, | |
623 | RTM_NEWNETCONF, | |
624 | NLM_F_MULTI, | |
053c095a | 625 | -1) < 0) { |
7a674200 ND |
626 | rcu_read_unlock(); |
627 | goto done; | |
628 | } | |
63998ac2 | 629 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
7a674200 ND |
630 | cont: |
631 | idx++; | |
632 | } | |
633 | rcu_read_unlock(); | |
634 | } | |
635 | if (h == NETDEV_HASHENTRIES) { | |
636 | if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_ALL, | |
637 | net->ipv6.devconf_all, | |
638 | NETLINK_CB(cb->skb).portid, | |
639 | cb->nlh->nlmsg_seq, | |
640 | RTM_NEWNETCONF, NLM_F_MULTI, | |
053c095a | 641 | -1) < 0) |
7a674200 ND |
642 | goto done; |
643 | else | |
644 | h++; | |
645 | } | |
646 | if (h == NETDEV_HASHENTRIES + 1) { | |
647 | if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_DEFAULT, | |
648 | net->ipv6.devconf_dflt, | |
649 | NETLINK_CB(cb->skb).portid, | |
650 | cb->nlh->nlmsg_seq, | |
651 | RTM_NEWNETCONF, NLM_F_MULTI, | |
053c095a | 652 | -1) < 0) |
7a674200 ND |
653 | goto done; |
654 | else | |
655 | h++; | |
656 | } | |
657 | done: | |
658 | cb->args[0] = h; | |
659 | cb->args[1] = idx; | |
660 | ||
661 | return skb->len; | |
662 | } | |
663 | ||
1da177e4 LT |
664 | #ifdef CONFIG_SYSCTL |
665 | static void dev_forward_change(struct inet6_dev *idev) | |
666 | { | |
667 | struct net_device *dev; | |
668 | struct inet6_ifaddr *ifa; | |
1da177e4 LT |
669 | |
670 | if (!idev) | |
671 | return; | |
672 | dev = idev->dev; | |
0187bdfb BH |
673 | if (idev->cnf.forwarding) |
674 | dev_disable_lro(dev); | |
1a940835 | 675 | if (dev->flags & IFF_MULTICAST) { |
2c5e8933 | 676 | if (idev->cnf.forwarding) { |
f3ee4010 | 677 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
2c5e8933 HFS |
678 | ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allrouters); |
679 | ipv6_dev_mc_inc(dev, &in6addr_sitelocal_allrouters); | |
680 | } else { | |
f3ee4010 | 681 | ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters); |
2c5e8933 HFS |
682 | ipv6_dev_mc_dec(dev, &in6addr_interfacelocal_allrouters); |
683 | ipv6_dev_mc_dec(dev, &in6addr_sitelocal_allrouters); | |
684 | } | |
1da177e4 | 685 | } |
502a2ffd | 686 | |
687 | list_for_each_entry(ifa, &idev->addr_list, if_list) { | |
2c12a74c MW |
688 | if (ifa->flags&IFA_F_TENTATIVE) |
689 | continue; | |
1da177e4 LT |
690 | if (idev->cnf.forwarding) |
691 | addrconf_join_anycast(ifa); | |
692 | else | |
693 | addrconf_leave_anycast(ifa); | |
694 | } | |
f3a1bfb1 ND |
695 | inet6_netconf_notify_devconf(dev_net(dev), NETCONFA_FORWARDING, |
696 | dev->ifindex, &idev->cnf); | |
1da177e4 LT |
697 | } |
698 | ||
699 | ||
e186932b | 700 | static void addrconf_forward_change(struct net *net, __s32 newf) |
1da177e4 LT |
701 | { |
702 | struct net_device *dev; | |
703 | struct inet6_dev *idev; | |
704 | ||
4acd4945 | 705 | for_each_netdev(net, dev) { |
1da177e4 LT |
706 | idev = __in6_dev_get(dev); |
707 | if (idev) { | |
e186932b PE |
708 | int changed = (!idev->cnf.forwarding) ^ (!newf); |
709 | idev->cnf.forwarding = newf; | |
1da177e4 LT |
710 | if (changed) |
711 | dev_forward_change(idev); | |
712 | } | |
1da177e4 | 713 | } |
1da177e4 | 714 | } |
c8fecf22 | 715 | |
013d97e9 | 716 | static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int newf) |
c8fecf22 | 717 | { |
bff16c2f | 718 | struct net *net; |
013d97e9 FR |
719 | int old; |
720 | ||
721 | if (!rtnl_trylock()) | |
722 | return restart_syscall(); | |
bff16c2f PE |
723 | |
724 | net = (struct net *)table->extra2; | |
013d97e9 FR |
725 | old = *p; |
726 | *p = newf; | |
b325fddb | 727 | |
013d97e9 | 728 | if (p == &net->ipv6.devconf_dflt->forwarding) { |
f3a1bfb1 ND |
729 | if ((!newf) ^ (!old)) |
730 | inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING, | |
731 | NETCONFA_IFINDEX_DEFAULT, | |
732 | net->ipv6.devconf_dflt); | |
013d97e9 FR |
733 | rtnl_unlock(); |
734 | return 0; | |
88af182e | 735 | } |
c8fecf22 | 736 | |
e186932b | 737 | if (p == &net->ipv6.devconf_all->forwarding) { |
e186932b PE |
738 | net->ipv6.devconf_dflt->forwarding = newf; |
739 | addrconf_forward_change(net, newf); | |
f3a1bfb1 ND |
740 | if ((!newf) ^ (!old)) |
741 | inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING, | |
742 | NETCONFA_IFINDEX_ALL, | |
743 | net->ipv6.devconf_all); | |
013d97e9 | 744 | } else if ((!newf) ^ (!old)) |
c8fecf22 | 745 | dev_forward_change((struct inet6_dev *)table->extra1); |
0187bdfb | 746 | rtnl_unlock(); |
c8fecf22 | 747 | |
013d97e9 | 748 | if (newf) |
7b4da532 | 749 | rt6_purge_dflt_routers(net); |
b325fddb | 750 | return 1; |
c8fecf22 | 751 | } |
1da177e4 LT |
752 | #endif |
753 | ||
5c578aed | 754 | /* Nobody refers to this ifaddr, destroy it */ |
1da177e4 LT |
755 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) |
756 | { | |
c2e21293 | 757 | WARN_ON(!hlist_unhashed(&ifp->addr_lst)); |
547b792c | 758 | |
1da177e4 | 759 | #ifdef NET_REFCNT_DEBUG |
91df42be | 760 | pr_debug("%s\n", __func__); |
1da177e4 LT |
761 | #endif |
762 | ||
763 | in6_dev_put(ifp->idev); | |
764 | ||
c15b1cca HFS |
765 | if (cancel_delayed_work(&ifp->dad_work)) |
766 | pr_notice("delayed DAD work was pending while freeing ifa=%p\n", | |
767 | ifp); | |
1da177e4 | 768 | |
e9d3e084 | 769 | if (ifp->state != INET6_IFADDR_STATE_DEAD) { |
f3213831 | 770 | pr_warn("Freeing alive inet6 address %p\n", ifp); |
1da177e4 LT |
771 | return; |
772 | } | |
94e187c0 | 773 | ip6_rt_put(ifp->rt); |
1da177e4 | 774 | |
e5785985 | 775 | kfree_rcu(ifp, rcu); |
1da177e4 LT |
776 | } |
777 | ||
e55ffac6 BH |
778 | static void |
779 | ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp) | |
780 | { | |
502a2ffd | 781 | struct list_head *p; |
8a6ce0c0 | 782 | int ifp_scope = ipv6_addr_src_scope(&ifp->addr); |
e55ffac6 BH |
783 | |
784 | /* | |
785 | * Each device address list is sorted in order of scope - | |
786 | * global before linklocal. | |
787 | */ | |
502a2ffd | 788 | list_for_each(p, &idev->addr_list) { |
789 | struct inet6_ifaddr *ifa | |
790 | = list_entry(p, struct inet6_ifaddr, if_list); | |
8a6ce0c0 | 791 | if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr)) |
e55ffac6 BH |
792 | break; |
793 | } | |
794 | ||
b54c9b98 | 795 | list_add_tail(&ifp->if_list, p); |
e55ffac6 BH |
796 | } |
797 | ||
ddbe5032 | 798 | static u32 inet6_addr_hash(const struct in6_addr *addr) |
3eb84f49 | 799 | { |
ddbe5032 | 800 | return hash_32(ipv6_addr_hash(addr), IN6_ADDR_HSIZE_SHIFT); |
3eb84f49 YH |
801 | } |
802 | ||
1da177e4 LT |
803 | /* On success it returns ifp with increased reference count */ |
804 | ||
805 | static struct inet6_ifaddr * | |
3f8f5298 JP |
806 | ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, |
807 | const struct in6_addr *peer_addr, int pfxlen, | |
8a226b2c | 808 | int scope, u32 flags, u32 valid_lft, u32 prefered_lft) |
1da177e4 LT |
809 | { |
810 | struct inet6_ifaddr *ifa = NULL; | |
811 | struct rt6_info *rt; | |
3a88a81d | 812 | unsigned int hash; |
1da177e4 | 813 | int err = 0; |
d68b8270 YH |
814 | int addr_type = ipv6_addr_type(addr); |
815 | ||
816 | if (addr_type == IPV6_ADDR_ANY || | |
817 | addr_type & IPV6_ADDR_MULTICAST || | |
818 | (!(idev->dev->flags & IFF_LOOPBACK) && | |
819 | addr_type & IPV6_ADDR_LOOPBACK)) | |
820 | return ERR_PTR(-EADDRNOTAVAIL); | |
1da177e4 | 821 | |
8814c4b5 | 822 | rcu_read_lock_bh(); |
1da177e4 LT |
823 | if (idev->dead) { |
824 | err = -ENODEV; /*XXX*/ | |
825 | goto out2; | |
826 | } | |
827 | ||
56d417b1 | 828 | if (idev->cnf.disable_ipv6) { |
9bdd8d40 BH |
829 | err = -EACCES; |
830 | goto out2; | |
831 | } | |
832 | ||
5c578aed | 833 | spin_lock(&addrconf_hash_lock); |
1da177e4 LT |
834 | |
835 | /* Ignore adding duplicate addresses on an interface */ | |
c346dca1 | 836 | if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) { |
ba3542e1 | 837 | ADBG("ipv6_add_addr: already assigned\n"); |
1da177e4 LT |
838 | err = -EEXIST; |
839 | goto out; | |
840 | } | |
841 | ||
322f74a4 | 842 | ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); |
1da177e4 LT |
843 | |
844 | if (ifa == NULL) { | |
ba3542e1 | 845 | ADBG("ipv6_add_addr: malloc failed\n"); |
1da177e4 LT |
846 | err = -ENOBUFS; |
847 | goto out; | |
848 | } | |
849 | ||
8f031519 | 850 | rt = addrconf_dst_alloc(idev, addr, false); |
1da177e4 LT |
851 | if (IS_ERR(rt)) { |
852 | err = PTR_ERR(rt); | |
853 | goto out; | |
854 | } | |
855 | ||
bba24896 JP |
856 | neigh_parms_data_state_setall(idev->nd_parms); |
857 | ||
4e3fd7a0 | 858 | ifa->addr = *addr; |
3f8f5298 JP |
859 | if (peer_addr) |
860 | ifa->peer_addr = *peer_addr; | |
1da177e4 LT |
861 | |
862 | spin_lock_init(&ifa->lock); | |
e9d3e084 | 863 | spin_lock_init(&ifa->state_lock); |
c15b1cca | 864 | INIT_DELAYED_WORK(&ifa->dad_work, addrconf_dad_work); |
c2e21293 | 865 | INIT_HLIST_NODE(&ifa->addr_lst); |
1da177e4 LT |
866 | ifa->scope = scope; |
867 | ifa->prefix_len = pfxlen; | |
868 | ifa->flags = flags | IFA_F_TENTATIVE; | |
8a226b2c JB |
869 | ifa->valid_lft = valid_lft; |
870 | ifa->prefered_lft = prefered_lft; | |
1da177e4 | 871 | ifa->cstamp = ifa->tstamp = jiffies; |
617fe29d | 872 | ifa->tokenized = false; |
1da177e4 | 873 | |
57f5f544 KF |
874 | ifa->rt = rt; |
875 | ||
1da177e4 LT |
876 | ifa->idev = idev; |
877 | in6_dev_hold(idev); | |
878 | /* For caller */ | |
879 | in6_ifa_hold(ifa); | |
880 | ||
881 | /* Add to big hash table */ | |
ddbe5032 | 882 | hash = inet6_addr_hash(addr); |
1da177e4 | 883 | |
5c578aed | 884 | hlist_add_head_rcu(&ifa->addr_lst, &inet6_addr_lst[hash]); |
5c578aed | 885 | spin_unlock(&addrconf_hash_lock); |
1da177e4 LT |
886 | |
887 | write_lock(&idev->lock); | |
888 | /* Add to inet6_dev unicast addr list. */ | |
e55ffac6 | 889 | ipv6_link_dev_addr(idev, ifa); |
1da177e4 | 890 | |
1da177e4 | 891 | if (ifa->flags&IFA_F_TEMPORARY) { |
372e6c8f | 892 | list_add(&ifa->tmp_list, &idev->tempaddr_list); |
1da177e4 LT |
893 | in6_ifa_hold(ifa); |
894 | } | |
1da177e4 | 895 | |
1da177e4 LT |
896 | in6_ifa_hold(ifa); |
897 | write_unlock(&idev->lock); | |
898 | out2: | |
8814c4b5 | 899 | rcu_read_unlock_bh(); |
1da177e4 | 900 | |
fd92833a | 901 | if (likely(err == 0)) |
f88c91dd | 902 | inet6addr_notifier_call_chain(NETDEV_UP, ifa); |
1da177e4 LT |
903 | else { |
904 | kfree(ifa); | |
905 | ifa = ERR_PTR(err); | |
906 | } | |
907 | ||
908 | return ifa; | |
909 | out: | |
5c578aed | 910 | spin_unlock(&addrconf_hash_lock); |
1da177e4 LT |
911 | goto out2; |
912 | } | |
913 | ||
5b84efec TH |
914 | enum cleanup_prefix_rt_t { |
915 | CLEANUP_PREFIX_RT_NOP, /* no cleanup action for prefix route */ | |
916 | CLEANUP_PREFIX_RT_DEL, /* delete the prefix route */ | |
917 | CLEANUP_PREFIX_RT_EXPIRE, /* update the lifetime of the prefix route */ | |
918 | }; | |
919 | ||
920 | /* | |
921 | * Check, whether the prefix for ifp would still need a prefix route | |
922 | * after deleting ifp. The function returns one of the CLEANUP_PREFIX_RT_* | |
923 | * constants. | |
924 | * | |
925 | * 1) we don't purge prefix if address was not permanent. | |
926 | * prefix is managed by its own lifetime. | |
927 | * 2) we also don't purge, if the address was IFA_F_NOPREFIXROUTE. | |
928 | * 3) if there are no addresses, delete prefix. | |
929 | * 4) if there are still other permanent address(es), | |
930 | * corresponding prefix is still permanent. | |
931 | * 5) if there are still other addresses with IFA_F_NOPREFIXROUTE, | |
932 | * don't purge the prefix, assume user space is managing it. | |
933 | * 6) otherwise, update prefix lifetime to the | |
934 | * longest valid lifetime among the corresponding | |
935 | * addresses on the device. | |
936 | * Note: subsequent RA will update lifetime. | |
937 | **/ | |
938 | static enum cleanup_prefix_rt_t | |
939 | check_cleanup_prefix_route(struct inet6_ifaddr *ifp, unsigned long *expires) | |
940 | { | |
941 | struct inet6_ifaddr *ifa; | |
942 | struct inet6_dev *idev = ifp->idev; | |
943 | unsigned long lifetime; | |
944 | enum cleanup_prefix_rt_t action = CLEANUP_PREFIX_RT_DEL; | |
945 | ||
946 | *expires = jiffies; | |
947 | ||
948 | list_for_each_entry(ifa, &idev->addr_list, if_list) { | |
949 | if (ifa == ifp) | |
950 | continue; | |
951 | if (!ipv6_prefix_equal(&ifa->addr, &ifp->addr, | |
952 | ifp->prefix_len)) | |
953 | continue; | |
954 | if (ifa->flags & (IFA_F_PERMANENT | IFA_F_NOPREFIXROUTE)) | |
955 | return CLEANUP_PREFIX_RT_NOP; | |
956 | ||
957 | action = CLEANUP_PREFIX_RT_EXPIRE; | |
958 | ||
959 | spin_lock(&ifa->lock); | |
960 | ||
961 | lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ); | |
962 | /* | |
963 | * Note: Because this address is | |
964 | * not permanent, lifetime < | |
965 | * LONG_MAX / HZ here. | |
966 | */ | |
967 | if (time_before(*expires, ifa->tstamp + lifetime * HZ)) | |
968 | *expires = ifa->tstamp + lifetime * HZ; | |
969 | spin_unlock(&ifa->lock); | |
970 | } | |
971 | ||
972 | return action; | |
973 | } | |
974 | ||
975 | static void | |
976 | cleanup_prefix_route(struct inet6_ifaddr *ifp, unsigned long expires, bool del_rt) | |
977 | { | |
978 | struct rt6_info *rt; | |
979 | ||
980 | rt = addrconf_get_prefix_route(&ifp->addr, | |
981 | ifp->prefix_len, | |
982 | ifp->idev->dev, | |
983 | 0, RTF_GATEWAY | RTF_DEFAULT); | |
984 | if (rt) { | |
985 | if (del_rt) | |
986 | ip6_del_rt(rt); | |
987 | else { | |
988 | if (!(rt->rt6i_flags & RTF_EXPIRES)) | |
989 | rt6_set_expires(rt, expires); | |
990 | ip6_rt_put(rt); | |
991 | } | |
992 | } | |
993 | } | |
994 | ||
995 | ||
1da177e4 LT |
996 | /* This function wants to get referenced ifp and releases it before return */ |
997 | ||
998 | static void ipv6_del_addr(struct inet6_ifaddr *ifp) | |
999 | { | |
4c5ff6a6 | 1000 | int state; |
5b84efec TH |
1001 | enum cleanup_prefix_rt_t action = CLEANUP_PREFIX_RT_NOP; |
1002 | unsigned long expires; | |
1da177e4 | 1003 | |
c15b1cca HFS |
1004 | ASSERT_RTNL(); |
1005 | ||
4c5ff6a6 HX |
1006 | spin_lock_bh(&ifp->state_lock); |
1007 | state = ifp->state; | |
e9d3e084 | 1008 | ifp->state = INET6_IFADDR_STATE_DEAD; |
4c5ff6a6 HX |
1009 | spin_unlock_bh(&ifp->state_lock); |
1010 | ||
1011 | if (state == INET6_IFADDR_STATE_DEAD) | |
1012 | goto out; | |
1da177e4 | 1013 | |
5c578aed | 1014 | spin_lock_bh(&addrconf_hash_lock); |
1015 | hlist_del_init_rcu(&ifp->addr_lst); | |
5c578aed | 1016 | spin_unlock_bh(&addrconf_hash_lock); |
1da177e4 | 1017 | |
5b84efec | 1018 | write_lock_bh(&ifp->idev->lock); |
5d9efa7e | 1019 | |
1da177e4 | 1020 | if (ifp->flags&IFA_F_TEMPORARY) { |
372e6c8f | 1021 | list_del(&ifp->tmp_list); |
1022 | if (ifp->ifpub) { | |
1023 | in6_ifa_put(ifp->ifpub); | |
1024 | ifp->ifpub = NULL; | |
1da177e4 | 1025 | } |
372e6c8f | 1026 | __in6_ifa_put(ifp); |
1da177e4 | 1027 | } |
1da177e4 | 1028 | |
5b84efec TH |
1029 | if (ifp->flags & IFA_F_PERMANENT && !(ifp->flags & IFA_F_NOPREFIXROUTE)) |
1030 | action = check_cleanup_prefix_route(ifp, &expires); | |
502a2ffd | 1031 | |
5b84efec TH |
1032 | list_del_init(&ifp->if_list); |
1033 | __in6_ifa_put(ifp); | |
1034 | ||
1035 | write_unlock_bh(&ifp->idev->lock); | |
1da177e4 | 1036 | |
c15b1cca | 1037 | addrconf_del_dad_work(ifp); |
b2238566 | 1038 | |
1da177e4 LT |
1039 | ipv6_ifa_notify(RTM_DELADDR, ifp); |
1040 | ||
f88c91dd | 1041 | inet6addr_notifier_call_chain(NETDEV_DOWN, ifp); |
1da177e4 | 1042 | |
5b84efec TH |
1043 | if (action != CLEANUP_PREFIX_RT_NOP) { |
1044 | cleanup_prefix_route(ifp, expires, | |
1045 | action == CLEANUP_PREFIX_RT_DEL); | |
1da177e4 LT |
1046 | } |
1047 | ||
c3968a85 DW |
1048 | /* clean up prefsrc entries */ |
1049 | rt6_remove_prefsrc(ifp); | |
4c5ff6a6 | 1050 | out: |
1da177e4 LT |
1051 | in6_ifa_put(ifp); |
1052 | } | |
1053 | ||
1da177e4 LT |
1054 | static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) |
1055 | { | |
1056 | struct inet6_dev *idev = ifp->idev; | |
1057 | struct in6_addr addr, *tmpaddr; | |
76f793e3 | 1058 | unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_tstamp, age; |
eac55bf9 | 1059 | unsigned long regen_advance; |
1da177e4 LT |
1060 | int tmp_plen; |
1061 | int ret = 0; | |
95c385b4 | 1062 | u32 addr_flags; |
76f793e3 | 1063 | unsigned long now = jiffies; |
1da177e4 | 1064 | |
53bd6749 | 1065 | write_lock_bh(&idev->lock); |
1da177e4 LT |
1066 | if (ift) { |
1067 | spin_lock_bh(&ift->lock); | |
1068 | memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); | |
1069 | spin_unlock_bh(&ift->lock); | |
1070 | tmpaddr = &addr; | |
1071 | } else { | |
1072 | tmpaddr = NULL; | |
1073 | } | |
1074 | retry: | |
1075 | in6_dev_hold(idev); | |
1076 | if (idev->cnf.use_tempaddr <= 0) { | |
53bd6749 | 1077 | write_unlock_bh(&idev->lock); |
f3213831 | 1078 | pr_info("%s: use_tempaddr is disabled\n", __func__); |
1da177e4 LT |
1079 | in6_dev_put(idev); |
1080 | ret = -1; | |
1081 | goto out; | |
1082 | } | |
1083 | spin_lock_bh(&ifp->lock); | |
1084 | if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { | |
1085 | idev->cnf.use_tempaddr = -1; /*XXX*/ | |
1086 | spin_unlock_bh(&ifp->lock); | |
53bd6749 | 1087 | write_unlock_bh(&idev->lock); |
f3213831 JP |
1088 | pr_warn("%s: regeneration time exceeded - disabled temporary address support\n", |
1089 | __func__); | |
1da177e4 LT |
1090 | in6_dev_put(idev); |
1091 | ret = -1; | |
1092 | goto out; | |
1093 | } | |
1094 | in6_ifa_hold(ifp); | |
1095 | memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); | |
eb7e0575 | 1096 | __ipv6_try_regen_rndid(idev, tmpaddr); |
1da177e4 | 1097 | memcpy(&addr.s6_addr[8], idev->rndid, 8); |
76f793e3 | 1098 | age = (now - ifp->tstamp) / HZ; |
1da177e4 LT |
1099 | tmp_valid_lft = min_t(__u32, |
1100 | ifp->valid_lft, | |
7a876b0e | 1101 | idev->cnf.temp_valid_lft + age); |
1ab1457c YH |
1102 | tmp_prefered_lft = min_t(__u32, |
1103 | ifp->prefered_lft, | |
7a876b0e | 1104 | idev->cnf.temp_prefered_lft + age - |
784e2710 | 1105 | idev->cnf.max_desync_factor); |
1da177e4 | 1106 | tmp_plen = ifp->prefix_len; |
1da177e4 LT |
1107 | tmp_tstamp = ifp->tstamp; |
1108 | spin_unlock_bh(&ifp->lock); | |
1109 | ||
eac55bf9 | 1110 | regen_advance = idev->cnf.regen_max_retry * |
67ba4152 IM |
1111 | idev->cnf.dad_transmits * |
1112 | NEIGH_VAR(idev->nd_parms, RETRANS_TIME) / HZ; | |
53bd6749 | 1113 | write_unlock_bh(&idev->lock); |
95c385b4 | 1114 | |
eac55bf9 BB |
1115 | /* A temporary address is created only if this calculated Preferred |
1116 | * Lifetime is greater than REGEN_ADVANCE time units. In particular, | |
1117 | * an implementation must not create a temporary address with a zero | |
1118 | * Preferred Lifetime. | |
ecab6701 HK |
1119 | * Use age calculation as in addrconf_verify to avoid unnecessary |
1120 | * temporary addresses being generated. | |
eac55bf9 | 1121 | */ |
ecab6701 HK |
1122 | age = (now - tmp_tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ; |
1123 | if (tmp_prefered_lft <= regen_advance + age) { | |
eac55bf9 BB |
1124 | in6_ifa_put(ifp); |
1125 | in6_dev_put(idev); | |
1126 | ret = -1; | |
1127 | goto out; | |
1128 | } | |
1129 | ||
95c385b4 NH |
1130 | addr_flags = IFA_F_TEMPORARY; |
1131 | /* set in addrconf_prefix_rcv() */ | |
1132 | if (ifp->flags & IFA_F_OPTIMISTIC) | |
1133 | addr_flags |= IFA_F_OPTIMISTIC; | |
1134 | ||
4b08a8f1 HFS |
1135 | ift = ipv6_add_addr(idev, &addr, NULL, tmp_plen, |
1136 | ipv6_addr_scope(&addr), addr_flags, | |
1137 | tmp_valid_lft, tmp_prefered_lft); | |
1138 | if (IS_ERR(ift)) { | |
1da177e4 LT |
1139 | in6_ifa_put(ifp); |
1140 | in6_dev_put(idev); | |
f3213831 | 1141 | pr_info("%s: retry temporary address regeneration\n", __func__); |
1da177e4 | 1142 | tmpaddr = &addr; |
53bd6749 | 1143 | write_lock_bh(&idev->lock); |
1da177e4 LT |
1144 | goto retry; |
1145 | } | |
1146 | ||
1147 | spin_lock_bh(&ift->lock); | |
1148 | ift->ifpub = ifp; | |
76f793e3 | 1149 | ift->cstamp = now; |
1da177e4 LT |
1150 | ift->tstamp = tmp_tstamp; |
1151 | spin_unlock_bh(&ift->lock); | |
1152 | ||
cf22f9a2 | 1153 | addrconf_dad_start(ift); |
1da177e4 LT |
1154 | in6_ifa_put(ift); |
1155 | in6_dev_put(idev); | |
1156 | out: | |
1157 | return ret; | |
1158 | } | |
1da177e4 LT |
1159 | |
1160 | /* | |
072047e4 | 1161 | * Choose an appropriate source address (RFC3484) |
1da177e4 | 1162 | */ |
a9b05723 YH |
1163 | enum { |
1164 | IPV6_SADDR_RULE_INIT = 0, | |
1165 | IPV6_SADDR_RULE_LOCAL, | |
1166 | IPV6_SADDR_RULE_SCOPE, | |
1167 | IPV6_SADDR_RULE_PREFERRED, | |
1168 | #ifdef CONFIG_IPV6_MIP6 | |
1169 | IPV6_SADDR_RULE_HOA, | |
1170 | #endif | |
1171 | IPV6_SADDR_RULE_OIF, | |
1172 | IPV6_SADDR_RULE_LABEL, | |
a9b05723 | 1173 | IPV6_SADDR_RULE_PRIVACY, |
a9b05723 YH |
1174 | IPV6_SADDR_RULE_ORCHID, |
1175 | IPV6_SADDR_RULE_PREFIX, | |
7fd2561e EK |
1176 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
1177 | IPV6_SADDR_RULE_NOT_OPTIMISTIC, | |
1178 | #endif | |
a9b05723 YH |
1179 | IPV6_SADDR_RULE_MAX |
1180 | }; | |
1181 | ||
072047e4 | 1182 | struct ipv6_saddr_score { |
a9b05723 YH |
1183 | int rule; |
1184 | int addr_type; | |
1185 | struct inet6_ifaddr *ifa; | |
1186 | DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX); | |
1187 | int scopedist; | |
1188 | int matchlen; | |
072047e4 YH |
1189 | }; |
1190 | ||
a9b05723 | 1191 | struct ipv6_saddr_dst { |
9acd9f3a | 1192 | const struct in6_addr *addr; |
a9b05723 YH |
1193 | int ifindex; |
1194 | int scope; | |
1195 | int label; | |
7cbca67c | 1196 | unsigned int prefs; |
a9b05723 | 1197 | }; |
072047e4 | 1198 | |
b6f99a21 | 1199 | static inline int ipv6_saddr_preferred(int type) |
1da177e4 | 1200 | { |
45bb0060 | 1201 | if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|IPV6_ADDR_LOOPBACK)) |
072047e4 YH |
1202 | return 1; |
1203 | return 0; | |
1da177e4 LT |
1204 | } |
1205 | ||
7fd2561e EK |
1206 | static inline bool ipv6_use_optimistic_addr(struct inet6_dev *idev) |
1207 | { | |
1208 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
1209 | return idev && idev->cnf.optimistic_dad && idev->cnf.use_optimistic; | |
1210 | #else | |
1211 | return false; | |
1212 | #endif | |
1213 | } | |
1214 | ||
3de23255 BT |
1215 | static int ipv6_get_saddr_eval(struct net *net, |
1216 | struct ipv6_saddr_score *score, | |
a9b05723 YH |
1217 | struct ipv6_saddr_dst *dst, |
1218 | int i) | |
1219 | { | |
1220 | int ret; | |
1221 | ||
1222 | if (i <= score->rule) { | |
1223 | switch (i) { | |
1224 | case IPV6_SADDR_RULE_SCOPE: | |
1225 | ret = score->scopedist; | |
1226 | break; | |
1227 | case IPV6_SADDR_RULE_PREFIX: | |
1228 | ret = score->matchlen; | |
1229 | break; | |
1230 | default: | |
1231 | ret = !!test_bit(i, score->scorebits); | |
1232 | } | |
1233 | goto out; | |
1234 | } | |
1235 | ||
1236 | switch (i) { | |
1237 | case IPV6_SADDR_RULE_INIT: | |
1238 | /* Rule 0: remember if hiscore is not ready yet */ | |
1239 | ret = !!score->ifa; | |
1240 | break; | |
1241 | case IPV6_SADDR_RULE_LOCAL: | |
1242 | /* Rule 1: Prefer same address */ | |
1243 | ret = ipv6_addr_equal(&score->ifa->addr, dst->addr); | |
1244 | break; | |
1245 | case IPV6_SADDR_RULE_SCOPE: | |
1246 | /* Rule 2: Prefer appropriate scope | |
1247 | * | |
1248 | * ret | |
1249 | * ^ | |
1250 | * -1 | d 15 | |
1251 | * ---+--+-+---> scope | |
1252 | * | | |
1253 | * | d is scope of the destination. | |
1254 | * B-d | \ | |
1255 | * | \ <- smaller scope is better if | |
db9c7c39 | 1256 | * B-15 | \ if scope is enough for destination. |
a9b05723 YH |
1257 | * | ret = B - scope (-1 <= scope >= d <= 15). |
1258 | * d-C-1 | / | |
1259 | * |/ <- greater is better | |
1260 | * -C / if scope is not enough for destination. | |
1261 | * /| ret = scope - C (-1 <= d < scope <= 15). | |
1262 | * | |
1263 | * d - C - 1 < B -15 (for all -1 <= d <= 15). | |
1264 | * C > d + 14 - B >= 15 + 14 - B = 29 - B. | |
1265 | * Assume B = 0 and we get C > 29. | |
1266 | */ | |
1267 | ret = __ipv6_addr_src_scope(score->addr_type); | |
1268 | if (ret >= dst->scope) | |
1269 | ret = -ret; | |
1270 | else | |
1271 | ret -= 128; /* 30 is enough */ | |
1272 | score->scopedist = ret; | |
1273 | break; | |
1274 | case IPV6_SADDR_RULE_PREFERRED: | |
7fd2561e | 1275 | { |
a9b05723 | 1276 | /* Rule 3: Avoid deprecated and optimistic addresses */ |
7fd2561e EK |
1277 | u8 avoid = IFA_F_DEPRECATED; |
1278 | ||
1279 | if (!ipv6_use_optimistic_addr(score->ifa->idev)) | |
1280 | avoid |= IFA_F_OPTIMISTIC; | |
a9b05723 | 1281 | ret = ipv6_saddr_preferred(score->addr_type) || |
7fd2561e | 1282 | !(score->ifa->flags & avoid); |
a9b05723 | 1283 | break; |
7fd2561e | 1284 | } |
a9b05723 YH |
1285 | #ifdef CONFIG_IPV6_MIP6 |
1286 | case IPV6_SADDR_RULE_HOA: | |
7cbca67c | 1287 | { |
a9b05723 | 1288 | /* Rule 4: Prefer home address */ |
7cbca67c YH |
1289 | int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA); |
1290 | ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome; | |
a9b05723 | 1291 | break; |
7cbca67c | 1292 | } |
a9b05723 YH |
1293 | #endif |
1294 | case IPV6_SADDR_RULE_OIF: | |
1295 | /* Rule 5: Prefer outgoing interface */ | |
1296 | ret = (!dst->ifindex || | |
1297 | dst->ifindex == score->ifa->idev->dev->ifindex); | |
1298 | break; | |
1299 | case IPV6_SADDR_RULE_LABEL: | |
1300 | /* Rule 6: Prefer matching label */ | |
3de23255 BT |
1301 | ret = ipv6_addr_label(net, |
1302 | &score->ifa->addr, score->addr_type, | |
a9b05723 YH |
1303 | score->ifa->idev->dev->ifindex) == dst->label; |
1304 | break; | |
a9b05723 | 1305 | case IPV6_SADDR_RULE_PRIVACY: |
7cbca67c | 1306 | { |
a9b05723 | 1307 | /* Rule 7: Prefer public address |
25985edc | 1308 | * Note: prefer temporary address if use_tempaddr >= 2 |
a9b05723 | 1309 | */ |
7cbca67c YH |
1310 | int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ? |
1311 | !!(dst->prefs & IPV6_PREFER_SRC_TMP) : | |
1312 | score->ifa->idev->cnf.use_tempaddr >= 2; | |
1313 | ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp; | |
a9b05723 | 1314 | break; |
7cbca67c | 1315 | } |
a9b05723 YH |
1316 | case IPV6_SADDR_RULE_ORCHID: |
1317 | /* Rule 8-: Prefer ORCHID vs ORCHID or | |
1318 | * non-ORCHID vs non-ORCHID | |
1319 | */ | |
1320 | ret = !(ipv6_addr_orchid(&score->ifa->addr) ^ | |
1321 | ipv6_addr_orchid(dst->addr)); | |
1322 | break; | |
1323 | case IPV6_SADDR_RULE_PREFIX: | |
1324 | /* Rule 8: Use longest matching prefix */ | |
91b4b04f YH |
1325 | ret = ipv6_addr_diff(&score->ifa->addr, dst->addr); |
1326 | if (ret > score->ifa->prefix_len) | |
1327 | ret = score->ifa->prefix_len; | |
1328 | score->matchlen = ret; | |
a9b05723 | 1329 | break; |
7fd2561e EK |
1330 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
1331 | case IPV6_SADDR_RULE_NOT_OPTIMISTIC: | |
1332 | /* Optimistic addresses still have lower precedence than other | |
1333 | * preferred addresses. | |
1334 | */ | |
1335 | ret = !(score->ifa->flags & IFA_F_OPTIMISTIC); | |
1336 | break; | |
1337 | #endif | |
a9b05723 YH |
1338 | default: |
1339 | ret = 0; | |
1340 | } | |
1341 | ||
1342 | if (ret) | |
1343 | __set_bit(i, score->scorebits); | |
1344 | score->rule = i; | |
1345 | out: | |
1346 | return ret; | |
1347 | } | |
1348 | ||
b3f644fc | 1349 | int ipv6_dev_get_saddr(struct net *net, const struct net_device *dst_dev, |
9acd9f3a | 1350 | const struct in6_addr *daddr, unsigned int prefs, |
7cbca67c | 1351 | struct in6_addr *saddr) |
1da177e4 | 1352 | { |
a9b05723 YH |
1353 | struct ipv6_saddr_score scores[2], |
1354 | *score = &scores[0], *hiscore = &scores[1]; | |
a9b05723 | 1355 | struct ipv6_saddr_dst dst; |
072047e4 | 1356 | struct net_device *dev; |
a9b05723 | 1357 | int dst_type; |
1da177e4 | 1358 | |
a9b05723 YH |
1359 | dst_type = __ipv6_addr_type(daddr); |
1360 | dst.addr = daddr; | |
1361 | dst.ifindex = dst_dev ? dst_dev->ifindex : 0; | |
1362 | dst.scope = __ipv6_addr_src_scope(dst_type); | |
3de23255 | 1363 | dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex); |
7cbca67c | 1364 | dst.prefs = prefs; |
a9b05723 YH |
1365 | |
1366 | hiscore->rule = -1; | |
1367 | hiscore->ifa = NULL; | |
1da177e4 | 1368 | |
8814c4b5 | 1369 | rcu_read_lock(); |
1da177e4 | 1370 | |
c6d14c84 | 1371 | for_each_netdev_rcu(net, dev) { |
072047e4 | 1372 | struct inet6_dev *idev; |
072047e4 | 1373 | |
a9b05723 | 1374 | /* Candidate Source Address (section 4) |
072047e4 YH |
1375 | * - multicast and link-local destination address, |
1376 | * the set of candidate source address MUST only | |
1377 | * include addresses assigned to interfaces | |
1378 | * belonging to the same link as the outgoing | |
1379 | * interface. | |
1380 | * (- For site-local destination addresses, the | |
1381 | * set of candidate source addresses MUST only | |
1382 | * include addresses assigned to interfaces | |
1383 | * belonging to the same site as the outgoing | |
1384 | * interface.) | |
1385 | */ | |
a9b05723 YH |
1386 | if (((dst_type & IPV6_ADDR_MULTICAST) || |
1387 | dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL) && | |
1388 | dst.ifindex && dev->ifindex != dst.ifindex) | |
072047e4 | 1389 | continue; |
1da177e4 | 1390 | |
1da177e4 | 1391 | idev = __in6_dev_get(dev); |
072047e4 YH |
1392 | if (!idev) |
1393 | continue; | |
1394 | ||
1395 | read_lock_bh(&idev->lock); | |
502a2ffd | 1396 | list_for_each_entry(score->ifa, &idev->addr_list, if_list) { |
a9b05723 | 1397 | int i; |
072047e4 | 1398 | |
a9b05723 | 1399 | /* |
6b3ae80a YH |
1400 | * - Tentative Address (RFC2462 section 5.4) |
1401 | * - A tentative address is not considered | |
1402 | * "assigned to an interface" in the traditional | |
95c385b4 | 1403 | * sense, unless it is also flagged as optimistic. |
6b3ae80a | 1404 | * - Candidate Source Address (section 4) |
072047e4 YH |
1405 | * - In any case, anycast addresses, multicast |
1406 | * addresses, and the unspecified address MUST | |
1407 | * NOT be included in a candidate set. | |
1408 | */ | |
a9b05723 YH |
1409 | if ((score->ifa->flags & IFA_F_TENTATIVE) && |
1410 | (!(score->ifa->flags & IFA_F_OPTIMISTIC))) | |
6b3ae80a | 1411 | continue; |
a9b05723 YH |
1412 | |
1413 | score->addr_type = __ipv6_addr_type(&score->ifa->addr); | |
1414 | ||
1415 | if (unlikely(score->addr_type == IPV6_ADDR_ANY || | |
1416 | score->addr_type & IPV6_ADDR_MULTICAST)) { | |
ba7a46f1 JP |
1417 | net_dbg_ratelimited("ADDRCONF: unspecified / multicast address assigned as unicast address on %s", |
1418 | dev->name); | |
072047e4 YH |
1419 | continue; |
1420 | } | |
1421 | ||
a9b05723 YH |
1422 | score->rule = -1; |
1423 | bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX); | |
1424 | ||
1425 | for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) { | |
1426 | int minihiscore, miniscore; | |
1427 | ||
3de23255 BT |
1428 | minihiscore = ipv6_get_saddr_eval(net, hiscore, &dst, i); |
1429 | miniscore = ipv6_get_saddr_eval(net, score, &dst, i); | |
a9b05723 YH |
1430 | |
1431 | if (minihiscore > miniscore) { | |
1432 | if (i == IPV6_SADDR_RULE_SCOPE && | |
1433 | score->scopedist > 0) { | |
1434 | /* | |
1435 | * special case: | |
1436 | * each remaining entry | |
1437 | * has too small (not enough) | |
1438 | * scope, because ifa entries | |
1439 | * are sorted by their scope | |
1440 | * values. | |
1441 | */ | |
1442 | goto try_nextdev; | |
1443 | } | |
1444 | break; | |
1445 | } else if (minihiscore < miniscore) { | |
a9b05723 YH |
1446 | if (hiscore->ifa) |
1447 | in6_ifa_put(hiscore->ifa); | |
1448 | ||
1449 | in6_ifa_hold(score->ifa); | |
1450 | ||
a0bffffc | 1451 | swap(hiscore, score); |
a9b05723 YH |
1452 | |
1453 | /* restore our iterator */ | |
1454 | score->ifa = hiscore->ifa; | |
1455 | ||
1456 | break; | |
1da177e4 | 1457 | } |
072047e4 | 1458 | } |
1da177e4 | 1459 | } |
a9b05723 | 1460 | try_nextdev: |
072047e4 | 1461 | read_unlock_bh(&idev->lock); |
1da177e4 | 1462 | } |
8814c4b5 | 1463 | rcu_read_unlock(); |
1da177e4 | 1464 | |
a9b05723 | 1465 | if (!hiscore->ifa) |
072047e4 | 1466 | return -EADDRNOTAVAIL; |
1ab1457c | 1467 | |
4e3fd7a0 | 1468 | *saddr = hiscore->ifa->addr; |
a9b05723 | 1469 | in6_ifa_put(hiscore->ifa); |
072047e4 | 1470 | return 0; |
1da177e4 | 1471 | } |
5e5f3f0f | 1472 | EXPORT_SYMBOL(ipv6_dev_get_saddr); |
1da177e4 | 1473 | |
8965779d | 1474 | int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr, |
479840ff | 1475 | u32 banned_flags) |
b7b1bfce HFS |
1476 | { |
1477 | struct inet6_ifaddr *ifp; | |
1478 | int err = -EADDRNOTAVAIL; | |
1479 | ||
602582ca HFS |
1480 | list_for_each_entry_reverse(ifp, &idev->addr_list, if_list) { |
1481 | if (ifp->scope > IFA_LINK) | |
1482 | break; | |
b7b1bfce HFS |
1483 | if (ifp->scope == IFA_LINK && |
1484 | !(ifp->flags & banned_flags)) { | |
1485 | *addr = ifp->addr; | |
1486 | err = 0; | |
1487 | break; | |
1488 | } | |
1489 | } | |
1490 | return err; | |
1491 | } | |
1492 | ||
95c385b4 | 1493 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, |
479840ff | 1494 | u32 banned_flags) |
1da177e4 LT |
1495 | { |
1496 | struct inet6_dev *idev; | |
1497 | int err = -EADDRNOTAVAIL; | |
1498 | ||
8814c4b5 | 1499 | rcu_read_lock(); |
e21e8467 SH |
1500 | idev = __in6_dev_get(dev); |
1501 | if (idev) { | |
1da177e4 | 1502 | read_lock_bh(&idev->lock); |
b7b1bfce | 1503 | err = __ipv6_get_lladdr(idev, addr, banned_flags); |
1da177e4 LT |
1504 | read_unlock_bh(&idev->lock); |
1505 | } | |
8814c4b5 | 1506 | rcu_read_unlock(); |
1da177e4 LT |
1507 | return err; |
1508 | } | |
1509 | ||
1510 | static int ipv6_count_addresses(struct inet6_dev *idev) | |
1511 | { | |
1512 | int cnt = 0; | |
1513 | struct inet6_ifaddr *ifp; | |
1514 | ||
1515 | read_lock_bh(&idev->lock); | |
502a2ffd | 1516 | list_for_each_entry(ifp, &idev->addr_list, if_list) |
1da177e4 LT |
1517 | cnt++; |
1518 | read_unlock_bh(&idev->lock); | |
1519 | return cnt; | |
1520 | } | |
1521 | ||
b71d1d42 | 1522 | int ipv6_chk_addr(struct net *net, const struct in6_addr *addr, |
2a7851bf | 1523 | const struct net_device *dev, int strict) |
c58da4c6 EK |
1524 | { |
1525 | return ipv6_chk_addr_and_flags(net, addr, dev, strict, IFA_F_TENTATIVE); | |
1526 | } | |
1527 | EXPORT_SYMBOL(ipv6_chk_addr); | |
1528 | ||
1529 | int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr, | |
1530 | const struct net_device *dev, int strict, | |
1531 | u32 banned_flags) | |
1da177e4 | 1532 | { |
eedf042a | 1533 | struct inet6_ifaddr *ifp; |
ddbe5032 | 1534 | unsigned int hash = inet6_addr_hash(addr); |
c58da4c6 | 1535 | u32 ifp_flags; |
1da177e4 | 1536 | |
5c578aed | 1537 | rcu_read_lock_bh(); |
b67bfe0d | 1538 | hlist_for_each_entry_rcu(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1539 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
bfeade08 | 1540 | continue; |
c58da4c6 EK |
1541 | /* Decouple optimistic from tentative for evaluation here. |
1542 | * Ban optimistic addresses explicitly, when required. | |
1543 | */ | |
1544 | ifp_flags = (ifp->flags&IFA_F_OPTIMISTIC) | |
1545 | ? (ifp->flags&~IFA_F_TENTATIVE) | |
1546 | : ifp->flags; | |
1da177e4 | 1547 | if (ipv6_addr_equal(&ifp->addr, addr) && |
c58da4c6 | 1548 | !(ifp_flags&banned_flags) && |
eedf042a SH |
1549 | (dev == NULL || ifp->idev->dev == dev || |
1550 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))) { | |
1551 | rcu_read_unlock_bh(); | |
1552 | return 1; | |
1da177e4 LT |
1553 | } |
1554 | } | |
5c578aed | 1555 | |
eedf042a SH |
1556 | rcu_read_unlock_bh(); |
1557 | return 0; | |
1da177e4 | 1558 | } |
c58da4c6 | 1559 | EXPORT_SYMBOL(ipv6_chk_addr_and_flags); |
7159039a | 1560 | |
3e81c6da DM |
1561 | static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
1562 | struct net_device *dev) | |
1da177e4 | 1563 | { |
ddbe5032 | 1564 | unsigned int hash = inet6_addr_hash(addr); |
c2e21293 | 1565 | struct inet6_ifaddr *ifp; |
1da177e4 | 1566 | |
b67bfe0d | 1567 | hlist_for_each_entry(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1568 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
06bfe655 | 1569 | continue; |
1da177e4 LT |
1570 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
1571 | if (dev == NULL || ifp->idev->dev == dev) | |
3e81c6da | 1572 | return true; |
1da177e4 LT |
1573 | } |
1574 | } | |
3e81c6da | 1575 | return false; |
1da177e4 LT |
1576 | } |
1577 | ||
7df37ff3 CB |
1578 | /* Compares an address/prefix_len with addresses on device @dev. |
1579 | * If one is found it returns true. | |
1580 | */ | |
1581 | bool ipv6_chk_custom_prefix(const struct in6_addr *addr, | |
1582 | const unsigned int prefix_len, struct net_device *dev) | |
1583 | { | |
1584 | struct inet6_dev *idev; | |
1585 | struct inet6_ifaddr *ifa; | |
1586 | bool ret = false; | |
1587 | ||
1588 | rcu_read_lock(); | |
1589 | idev = __in6_dev_get(dev); | |
1590 | if (idev) { | |
1591 | read_lock_bh(&idev->lock); | |
1592 | list_for_each_entry(ifa, &idev->addr_list, if_list) { | |
1593 | ret = ipv6_prefix_equal(addr, &ifa->addr, prefix_len); | |
1594 | if (ret) | |
1595 | break; | |
1596 | } | |
1597 | read_unlock_bh(&idev->lock); | |
1598 | } | |
1599 | rcu_read_unlock(); | |
1600 | ||
1601 | return ret; | |
1602 | } | |
1603 | EXPORT_SYMBOL(ipv6_chk_custom_prefix); | |
1604 | ||
b71d1d42 | 1605 | int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev) |
52eeeb84 YH |
1606 | { |
1607 | struct inet6_dev *idev; | |
1608 | struct inet6_ifaddr *ifa; | |
1609 | int onlink; | |
1610 | ||
1611 | onlink = 0; | |
1612 | rcu_read_lock(); | |
1613 | idev = __in6_dev_get(dev); | |
1614 | if (idev) { | |
1615 | read_lock_bh(&idev->lock); | |
502a2ffd | 1616 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
52eeeb84 YH |
1617 | onlink = ipv6_prefix_equal(addr, &ifa->addr, |
1618 | ifa->prefix_len); | |
1619 | if (onlink) | |
1620 | break; | |
1621 | } | |
1622 | read_unlock_bh(&idev->lock); | |
1623 | } | |
1624 | rcu_read_unlock(); | |
1625 | return onlink; | |
1626 | } | |
52eeeb84 YH |
1627 | EXPORT_SYMBOL(ipv6_chk_prefix); |
1628 | ||
9acd9f3a | 1629 | struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr, |
1cab3da6 | 1630 | struct net_device *dev, int strict) |
1da177e4 | 1631 | { |
b79d1d54 | 1632 | struct inet6_ifaddr *ifp, *result = NULL; |
ddbe5032 | 1633 | unsigned int hash = inet6_addr_hash(addr); |
1da177e4 | 1634 | |
5c578aed | 1635 | rcu_read_lock_bh(); |
b67bfe0d | 1636 | hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1637 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
1cab3da6 | 1638 | continue; |
1da177e4 LT |
1639 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
1640 | if (dev == NULL || ifp->idev->dev == dev || | |
1641 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { | |
b79d1d54 | 1642 | result = ifp; |
1da177e4 LT |
1643 | in6_ifa_hold(ifp); |
1644 | break; | |
1645 | } | |
1646 | } | |
1647 | } | |
5c578aed | 1648 | rcu_read_unlock_bh(); |
1da177e4 | 1649 | |
b79d1d54 | 1650 | return result; |
1da177e4 LT |
1651 | } |
1652 | ||
1da177e4 LT |
1653 | /* Gets referenced address, destroys ifaddr */ |
1654 | ||
cc411d0b | 1655 | static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed) |
1da177e4 | 1656 | { |
1da177e4 LT |
1657 | if (ifp->flags&IFA_F_PERMANENT) { |
1658 | spin_lock_bh(&ifp->lock); | |
c15b1cca | 1659 | addrconf_del_dad_work(ifp); |
1da177e4 | 1660 | ifp->flags |= IFA_F_TENTATIVE; |
cc411d0b BH |
1661 | if (dad_failed) |
1662 | ifp->flags |= IFA_F_DADFAILED; | |
1da177e4 | 1663 | spin_unlock_bh(&ifp->lock); |
e2577a06 HX |
1664 | if (dad_failed) |
1665 | ipv6_ifa_notify(0, ifp); | |
1da177e4 | 1666 | in6_ifa_put(ifp); |
1da177e4 LT |
1667 | } else if (ifp->flags&IFA_F_TEMPORARY) { |
1668 | struct inet6_ifaddr *ifpub; | |
1669 | spin_lock_bh(&ifp->lock); | |
1670 | ifpub = ifp->ifpub; | |
1671 | if (ifpub) { | |
1672 | in6_ifa_hold(ifpub); | |
1673 | spin_unlock_bh(&ifp->lock); | |
1674 | ipv6_create_tempaddr(ifpub, ifp); | |
1675 | in6_ifa_put(ifpub); | |
1676 | } else { | |
1677 | spin_unlock_bh(&ifp->lock); | |
1678 | } | |
1679 | ipv6_del_addr(ifp); | |
c15b1cca | 1680 | } else { |
1da177e4 | 1681 | ipv6_del_addr(ifp); |
c15b1cca | 1682 | } |
1da177e4 LT |
1683 | } |
1684 | ||
f2344a13 HX |
1685 | static int addrconf_dad_end(struct inet6_ifaddr *ifp) |
1686 | { | |
1687 | int err = -ENOENT; | |
1688 | ||
c15b1cca | 1689 | spin_lock_bh(&ifp->state_lock); |
f2344a13 HX |
1690 | if (ifp->state == INET6_IFADDR_STATE_DAD) { |
1691 | ifp->state = INET6_IFADDR_STATE_POSTDAD; | |
1692 | err = 0; | |
1693 | } | |
c15b1cca | 1694 | spin_unlock_bh(&ifp->state_lock); |
f2344a13 HX |
1695 | |
1696 | return err; | |
1697 | } | |
1698 | ||
3c21edbd YH |
1699 | void addrconf_dad_failure(struct inet6_ifaddr *ifp) |
1700 | { | |
1b34be74 | 1701 | struct inet6_dev *idev = ifp->idev; |
9bdd8d40 | 1702 | |
853dc2e0 UB |
1703 | if (addrconf_dad_end(ifp)) { |
1704 | in6_ifa_put(ifp); | |
f2344a13 | 1705 | return; |
853dc2e0 | 1706 | } |
f2344a13 | 1707 | |
e87cc472 JP |
1708 | net_info_ratelimited("%s: IPv6 duplicate address %pI6c detected!\n", |
1709 | ifp->idev->dev->name, &ifp->addr); | |
9bdd8d40 | 1710 | |
1b34be74 YH |
1711 | if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6) { |
1712 | struct in6_addr addr; | |
1713 | ||
1714 | addr.s6_addr32[0] = htonl(0xfe800000); | |
1715 | addr.s6_addr32[1] = 0; | |
1716 | ||
1717 | if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) && | |
1718 | ipv6_addr_equal(&ifp->addr, &addr)) { | |
1719 | /* DAD failed for link-local based on MAC address */ | |
1720 | idev->cnf.disable_ipv6 = 1; | |
9bdd8d40 | 1721 | |
f3213831 | 1722 | pr_info("%s: IPv6 being disabled!\n", |
9bdd8d40 | 1723 | ifp->idev->dev->name); |
1b34be74 YH |
1724 | } |
1725 | } | |
1726 | ||
c15b1cca HFS |
1727 | spin_lock_bh(&ifp->state_lock); |
1728 | /* transition from _POSTDAD to _ERRDAD */ | |
1729 | ifp->state = INET6_IFADDR_STATE_ERRDAD; | |
1730 | spin_unlock_bh(&ifp->state_lock); | |
1731 | ||
1732 | addrconf_mod_dad_work(ifp, 0); | |
3c21edbd | 1733 | } |
1da177e4 | 1734 | |
a9ed4a29 SD |
1735 | /* Join to solicited addr multicast group. |
1736 | * caller must hold RTNL */ | |
b71d1d42 | 1737 | void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr) |
1da177e4 LT |
1738 | { |
1739 | struct in6_addr maddr; | |
1740 | ||
1741 | if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1742 | return; | |
1743 | ||
1744 | addrconf_addr_solict_mult(addr, &maddr); | |
1745 | ipv6_dev_mc_inc(dev, &maddr); | |
1746 | } | |
1747 | ||
a9ed4a29 | 1748 | /* caller must hold RTNL */ |
b71d1d42 | 1749 | void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr) |
1da177e4 LT |
1750 | { |
1751 | struct in6_addr maddr; | |
1752 | ||
1753 | if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1754 | return; | |
1755 | ||
1756 | addrconf_addr_solict_mult(addr, &maddr); | |
1757 | __ipv6_dev_mc_dec(idev, &maddr); | |
1758 | } | |
1759 | ||
a9ed4a29 | 1760 | /* caller must hold RTNL */ |
20380731 | 1761 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1762 | { |
1763 | struct in6_addr addr; | |
c15b1cca | 1764 | |
88ad3149 | 1765 | if (ifp->prefix_len >= 127) /* RFC 6164 */ |
2bda8a0c | 1766 | return; |
1da177e4 LT |
1767 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
1768 | if (ipv6_addr_any(&addr)) | |
1769 | return; | |
013b4d90 | 1770 | __ipv6_dev_ac_inc(ifp->idev, &addr); |
1da177e4 LT |
1771 | } |
1772 | ||
a9ed4a29 | 1773 | /* caller must hold RTNL */ |
20380731 | 1774 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1775 | { |
1776 | struct in6_addr addr; | |
c15b1cca | 1777 | |
88ad3149 | 1778 | if (ifp->prefix_len >= 127) /* RFC 6164 */ |
32019e65 | 1779 | return; |
1da177e4 LT |
1780 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
1781 | if (ipv6_addr_any(&addr)) | |
1782 | return; | |
1783 | __ipv6_dev_ac_dec(ifp->idev, &addr); | |
1784 | } | |
1785 | ||
073a8e0e YH |
1786 | static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) |
1787 | { | |
1788 | if (dev->addr_len != ETH_ALEN) | |
1789 | return -1; | |
1790 | memcpy(eui, dev->dev_addr, 3); | |
1791 | memcpy(eui + 5, dev->dev_addr + 3, 3); | |
1792 | ||
1793 | /* | |
1794 | * The zSeries OSA network cards can be shared among various | |
1795 | * OS instances, but the OSA cards have only one MAC address. | |
1796 | * This leads to duplicate address conflicts in conjunction | |
1797 | * with IPv6 if more than one instance uses the same card. | |
1798 | * | |
1799 | * The driver for these cards can deliver a unique 16-bit | |
1800 | * identifier for each instance sharing the same card. It is | |
1801 | * placed instead of 0xFFFE in the interface identifier. The | |
1802 | * "u" bit of the interface identifier is not inverted in this | |
1803 | * case. Hence the resulting interface identifier has local | |
1804 | * scope according to RFC2373. | |
1805 | */ | |
1806 | if (dev->dev_id) { | |
1807 | eui[3] = (dev->dev_id >> 8) & 0xFF; | |
1808 | eui[4] = dev->dev_id & 0xFF; | |
1809 | } else { | |
1810 | eui[3] = 0xFF; | |
1811 | eui[4] = 0xFE; | |
1812 | eui[0] ^= 2; | |
1813 | } | |
1814 | return 0; | |
1815 | } | |
1816 | ||
06a4c1c5 | 1817 | static int addrconf_ifid_eui64(u8 *eui, struct net_device *dev) |
1818 | { | |
1819 | if (dev->addr_len != IEEE802154_ADDR_LEN) | |
1820 | return -1; | |
1821 | memcpy(eui, dev->dev_addr, 8); | |
5e98a36e | 1822 | eui[0] ^= 2; |
06a4c1c5 | 1823 | return 0; |
1824 | } | |
1825 | ||
cb6bf355 YH |
1826 | static int addrconf_ifid_ieee1394(u8 *eui, struct net_device *dev) |
1827 | { | |
1828 | union fwnet_hwaddr *ha; | |
1829 | ||
1830 | if (dev->addr_len != FWNET_ALEN) | |
1831 | return -1; | |
1832 | ||
1833 | ha = (union fwnet_hwaddr *)dev->dev_addr; | |
1834 | ||
1835 | memcpy(eui, &ha->uc.uniq_id, sizeof(ha->uc.uniq_id)); | |
1836 | eui[0] ^= 2; | |
1837 | return 0; | |
1838 | } | |
1839 | ||
073a8e0e YH |
1840 | static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) |
1841 | { | |
1842 | /* XXX: inherit EUI-64 from other interface -- yoshfuji */ | |
1843 | if (dev->addr_len != ARCNET_ALEN) | |
1844 | return -1; | |
1845 | memset(eui, 0, 7); | |
8e5e8f30 | 1846 | eui[7] = *(u8 *)dev->dev_addr; |
073a8e0e YH |
1847 | return 0; |
1848 | } | |
1849 | ||
1850 | static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) | |
1851 | { | |
1852 | if (dev->addr_len != INFINIBAND_ALEN) | |
1853 | return -1; | |
1854 | memcpy(eui, dev->dev_addr + 12, 8); | |
1855 | eui[0] |= 2; | |
1856 | return 0; | |
1857 | } | |
1858 | ||
c61393ea | 1859 | static int __ipv6_isatap_ifid(u8 *eui, __be32 addr) |
dfd982ba | 1860 | { |
9af28511 SH |
1861 | if (addr == 0) |
1862 | return -1; | |
dfd982ba YH |
1863 | eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) || |
1864 | ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) || | |
1865 | ipv4_is_private_172(addr) || ipv4_is_test_192(addr) || | |
1866 | ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) || | |
1867 | ipv4_is_test_198(addr) || ipv4_is_multicast(addr) || | |
1868 | ipv4_is_lbcast(addr)) ? 0x00 : 0x02; | |
1869 | eui[1] = 0; | |
1870 | eui[2] = 0x5E; | |
1871 | eui[3] = 0xFE; | |
1872 | memcpy(eui + 4, &addr, 4); | |
1873 | return 0; | |
1874 | } | |
dfd982ba YH |
1875 | |
1876 | static int addrconf_ifid_sit(u8 *eui, struct net_device *dev) | |
1877 | { | |
1878 | if (dev->priv_flags & IFF_ISATAP) | |
1879 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); | |
1880 | return -1; | |
1881 | } | |
1882 | ||
aee80b54 | 1883 | static int addrconf_ifid_gre(u8 *eui, struct net_device *dev) |
1884 | { | |
1885 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); | |
1886 | } | |
1887 | ||
e837735e ND |
1888 | static int addrconf_ifid_ip6tnl(u8 *eui, struct net_device *dev) |
1889 | { | |
1890 | memcpy(eui, dev->perm_addr, 3); | |
1891 | memcpy(eui + 5, dev->perm_addr + 3, 3); | |
1892 | eui[3] = 0xFF; | |
1893 | eui[4] = 0xFE; | |
1894 | eui[0] ^= 2; | |
1895 | return 0; | |
1896 | } | |
1897 | ||
1da177e4 LT |
1898 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) |
1899 | { | |
1900 | switch (dev->type) { | |
1901 | case ARPHRD_ETHER: | |
1902 | case ARPHRD_FDDI: | |
073a8e0e | 1903 | return addrconf_ifid_eui48(eui, dev); |
1da177e4 | 1904 | case ARPHRD_ARCNET: |
073a8e0e | 1905 | return addrconf_ifid_arcnet(eui, dev); |
1da177e4 | 1906 | case ARPHRD_INFINIBAND: |
073a8e0e | 1907 | return addrconf_ifid_infiniband(eui, dev); |
c7dc89c0 | 1908 | case ARPHRD_SIT: |
dfd982ba | 1909 | return addrconf_ifid_sit(eui, dev); |
aee80b54 | 1910 | case ARPHRD_IPGRE: |
1911 | return addrconf_ifid_gre(eui, dev); | |
e74bccb8 | 1912 | case ARPHRD_6LOWPAN: |
06a4c1c5 | 1913 | case ARPHRD_IEEE802154: |
1914 | return addrconf_ifid_eui64(eui, dev); | |
cb6bf355 YH |
1915 | case ARPHRD_IEEE1394: |
1916 | return addrconf_ifid_ieee1394(eui, dev); | |
e837735e ND |
1917 | case ARPHRD_TUNNEL6: |
1918 | return addrconf_ifid_ip6tnl(eui, dev); | |
1da177e4 LT |
1919 | } |
1920 | return -1; | |
1921 | } | |
1922 | ||
1923 | static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) | |
1924 | { | |
1925 | int err = -1; | |
1926 | struct inet6_ifaddr *ifp; | |
1927 | ||
1928 | read_lock_bh(&idev->lock); | |
602582ca HFS |
1929 | list_for_each_entry_reverse(ifp, &idev->addr_list, if_list) { |
1930 | if (ifp->scope > IFA_LINK) | |
1931 | break; | |
1da177e4 LT |
1932 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { |
1933 | memcpy(eui, ifp->addr.s6_addr+8, 8); | |
1934 | err = 0; | |
1935 | break; | |
1936 | } | |
1937 | } | |
1938 | read_unlock_bh(&idev->lock); | |
1939 | return err; | |
1940 | } | |
1941 | ||
1da177e4 | 1942 | /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ |
eb7e0575 | 1943 | static void __ipv6_regen_rndid(struct inet6_dev *idev) |
1da177e4 | 1944 | { |
1da177e4 | 1945 | regen: |
955189ef | 1946 | get_random_bytes(idev->rndid, sizeof(idev->rndid)); |
1da177e4 | 1947 | idev->rndid[0] &= ~0x02; |
1da177e4 LT |
1948 | |
1949 | /* | |
1950 | * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: | |
1951 | * check if generated address is not inappropriate | |
1952 | * | |
1953 | * - Reserved subnet anycast (RFC 2526) | |
1954 | * 11111101 11....11 1xxxxxxx | |
c7dc89c0 | 1955 | * - ISATAP (RFC4214) 6.1 |
1da177e4 LT |
1956 | * 00-00-5E-FE-xx-xx-xx-xx |
1957 | * - value 0 | |
1958 | * - XXX: already assigned to an address on the device | |
1959 | */ | |
1ab1457c | 1960 | if (idev->rndid[0] == 0xfd && |
1da177e4 LT |
1961 | (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && |
1962 | (idev->rndid[7]&0x80)) | |
1963 | goto regen; | |
1964 | if ((idev->rndid[0]|idev->rndid[1]) == 0) { | |
1965 | if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) | |
1966 | goto regen; | |
1967 | if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) | |
1968 | goto regen; | |
1969 | } | |
1da177e4 LT |
1970 | } |
1971 | ||
1972 | static void ipv6_regen_rndid(unsigned long data) | |
1973 | { | |
1974 | struct inet6_dev *idev = (struct inet6_dev *) data; | |
1975 | unsigned long expires; | |
1976 | ||
8814c4b5 | 1977 | rcu_read_lock_bh(); |
1da177e4 LT |
1978 | write_lock_bh(&idev->lock); |
1979 | ||
1980 | if (idev->dead) | |
1981 | goto out; | |
1982 | ||
eb7e0575 | 1983 | __ipv6_regen_rndid(idev); |
1ab1457c | 1984 | |
1da177e4 | 1985 | expires = jiffies + |
1ab1457c | 1986 | idev->cnf.temp_prefered_lft * HZ - |
1f9248e5 JP |
1987 | idev->cnf.regen_max_retry * idev->cnf.dad_transmits * |
1988 | NEIGH_VAR(idev->nd_parms, RETRANS_TIME) - | |
784e2710 | 1989 | idev->cnf.max_desync_factor * HZ; |
1da177e4 | 1990 | if (time_before(expires, jiffies)) { |
f3213831 JP |
1991 | pr_warn("%s: too short regeneration interval; timer disabled for %s\n", |
1992 | __func__, idev->dev->name); | |
1da177e4 LT |
1993 | goto out; |
1994 | } | |
1995 | ||
1996 | if (!mod_timer(&idev->regen_timer, expires)) | |
1997 | in6_dev_hold(idev); | |
1998 | ||
1999 | out: | |
2000 | write_unlock_bh(&idev->lock); | |
8814c4b5 | 2001 | rcu_read_unlock_bh(); |
1da177e4 LT |
2002 | in6_dev_put(idev); |
2003 | } | |
2004 | ||
eb7e0575 | 2005 | static void __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) |
8e5e8f30 | 2006 | { |
1da177e4 | 2007 | if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) |
eb7e0575 | 2008 | __ipv6_regen_rndid(idev); |
1da177e4 | 2009 | } |
1da177e4 LT |
2010 | |
2011 | /* | |
2012 | * Add prefix route. | |
2013 | */ | |
2014 | ||
2015 | static void | |
2016 | addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev, | |
e431b8c0 | 2017 | unsigned long expires, u32 flags) |
1da177e4 | 2018 | { |
86872cb5 TG |
2019 | struct fib6_config cfg = { |
2020 | .fc_table = RT6_TABLE_PREFIX, | |
2021 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
2022 | .fc_ifindex = dev->ifindex, | |
2023 | .fc_expires = expires, | |
2024 | .fc_dst_len = plen, | |
2025 | .fc_flags = RTF_UP | flags, | |
c346dca1 | 2026 | .fc_nlinfo.nl_net = dev_net(dev), |
f410a1fb | 2027 | .fc_protocol = RTPROT_KERNEL, |
86872cb5 | 2028 | }; |
1da177e4 | 2029 | |
4e3fd7a0 | 2030 | cfg.fc_dst = *pfx; |
1da177e4 LT |
2031 | |
2032 | /* Prevent useless cloning on PtP SIT. | |
2033 | This thing is done here expecting that the whole | |
2034 | class of non-broadcast devices need not cloning. | |
2035 | */ | |
07a93626 | 2036 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
86872cb5 TG |
2037 | if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT)) |
2038 | cfg.fc_flags |= RTF_NONEXTHOP; | |
0be669bb | 2039 | #endif |
1da177e4 | 2040 | |
86872cb5 | 2041 | ip6_route_add(&cfg); |
1da177e4 LT |
2042 | } |
2043 | ||
14ef37b6 AH |
2044 | |
2045 | static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx, | |
2046 | int plen, | |
2047 | const struct net_device *dev, | |
2048 | u32 flags, u32 noflags) | |
2049 | { | |
2050 | struct fib6_node *fn; | |
2051 | struct rt6_info *rt = NULL; | |
2052 | struct fib6_table *table; | |
2053 | ||
2054 | table = fib6_get_table(dev_net(dev), RT6_TABLE_PREFIX); | |
2055 | if (table == NULL) | |
2056 | return NULL; | |
2057 | ||
5744dd9b | 2058 | read_lock_bh(&table->tb6_lock); |
14ef37b6 AH |
2059 | fn = fib6_locate(&table->tb6_root, pfx, plen, NULL, 0); |
2060 | if (!fn) | |
2061 | goto out; | |
2062 | for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) { | |
d1918542 | 2063 | if (rt->dst.dev->ifindex != dev->ifindex) |
14ef37b6 AH |
2064 | continue; |
2065 | if ((rt->rt6i_flags & flags) != flags) | |
2066 | continue; | |
85da53bf | 2067 | if ((rt->rt6i_flags & noflags) != 0) |
14ef37b6 AH |
2068 | continue; |
2069 | dst_hold(&rt->dst); | |
2070 | break; | |
2071 | } | |
2072 | out: | |
5744dd9b | 2073 | read_unlock_bh(&table->tb6_lock); |
14ef37b6 AH |
2074 | return rt; |
2075 | } | |
2076 | ||
2077 | ||
1da177e4 LT |
2078 | /* Create "default" multicast route to the interface */ |
2079 | ||
2080 | static void addrconf_add_mroute(struct net_device *dev) | |
2081 | { | |
86872cb5 TG |
2082 | struct fib6_config cfg = { |
2083 | .fc_table = RT6_TABLE_LOCAL, | |
2084 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
2085 | .fc_ifindex = dev->ifindex, | |
2086 | .fc_dst_len = 8, | |
2087 | .fc_flags = RTF_UP, | |
c346dca1 | 2088 | .fc_nlinfo.nl_net = dev_net(dev), |
86872cb5 TG |
2089 | }; |
2090 | ||
2091 | ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); | |
2092 | ||
2093 | ip6_route_add(&cfg); | |
1da177e4 LT |
2094 | } |
2095 | ||
1da177e4 LT |
2096 | static struct inet6_dev *addrconf_add_dev(struct net_device *dev) |
2097 | { | |
2098 | struct inet6_dev *idev; | |
2099 | ||
2100 | ASSERT_RTNL(); | |
2101 | ||
e21e8467 SH |
2102 | idev = ipv6_find_idev(dev); |
2103 | if (!idev) | |
64e724f6 BH |
2104 | return ERR_PTR(-ENOBUFS); |
2105 | ||
2106 | if (idev->cnf.disable_ipv6) | |
2107 | return ERR_PTR(-EACCES); | |
1da177e4 LT |
2108 | |
2109 | /* Add default multicast route */ | |
4af04aba LW |
2110 | if (!(dev->flags & IFF_LOOPBACK)) |
2111 | addrconf_add_mroute(dev); | |
1da177e4 | 2112 | |
1da177e4 LT |
2113 | return idev; |
2114 | } | |
2115 | ||
53bd6749 JP |
2116 | static void manage_tempaddrs(struct inet6_dev *idev, |
2117 | struct inet6_ifaddr *ifp, | |
2118 | __u32 valid_lft, __u32 prefered_lft, | |
2119 | bool create, unsigned long now) | |
2120 | { | |
2121 | u32 flags; | |
2122 | struct inet6_ifaddr *ift; | |
2123 | ||
2124 | read_lock_bh(&idev->lock); | |
2125 | /* update all temporary addresses in the list */ | |
2126 | list_for_each_entry(ift, &idev->tempaddr_list, tmp_list) { | |
2127 | int age, max_valid, max_prefered; | |
2128 | ||
2129 | if (ifp != ift->ifpub) | |
2130 | continue; | |
2131 | ||
2132 | /* RFC 4941 section 3.3: | |
2133 | * If a received option will extend the lifetime of a public | |
2134 | * address, the lifetimes of temporary addresses should | |
2135 | * be extended, subject to the overall constraint that no | |
2136 | * temporary addresses should ever remain "valid" or "preferred" | |
2137 | * for a time longer than (TEMP_VALID_LIFETIME) or | |
2138 | * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR), respectively. | |
2139 | */ | |
2140 | age = (now - ift->cstamp) / HZ; | |
2141 | max_valid = idev->cnf.temp_valid_lft - age; | |
2142 | if (max_valid < 0) | |
2143 | max_valid = 0; | |
2144 | ||
2145 | max_prefered = idev->cnf.temp_prefered_lft - | |
2146 | idev->cnf.max_desync_factor - age; | |
2147 | if (max_prefered < 0) | |
2148 | max_prefered = 0; | |
2149 | ||
2150 | if (valid_lft > max_valid) | |
2151 | valid_lft = max_valid; | |
2152 | ||
2153 | if (prefered_lft > max_prefered) | |
2154 | prefered_lft = max_prefered; | |
2155 | ||
2156 | spin_lock(&ift->lock); | |
2157 | flags = ift->flags; | |
2158 | ift->valid_lft = valid_lft; | |
2159 | ift->prefered_lft = prefered_lft; | |
2160 | ift->tstamp = now; | |
2161 | if (prefered_lft > 0) | |
2162 | ift->flags &= ~IFA_F_DEPRECATED; | |
2163 | ||
2164 | spin_unlock(&ift->lock); | |
2165 | if (!(flags&IFA_F_TENTATIVE)) | |
2166 | ipv6_ifa_notify(0, ift); | |
2167 | } | |
2168 | ||
2169 | if ((create || list_empty(&idev->tempaddr_list)) && | |
2170 | idev->cnf.use_tempaddr > 0) { | |
2171 | /* When a new public address is created as described | |
2172 | * in [ADDRCONF], also create a new temporary address. | |
2173 | * Also create a temporary address if it's enabled but | |
2174 | * no temporary address currently exists. | |
2175 | */ | |
2176 | read_unlock_bh(&idev->lock); | |
2177 | ipv6_create_tempaddr(ifp, NULL); | |
2178 | } else { | |
2179 | read_unlock_bh(&idev->lock); | |
2180 | } | |
2181 | } | |
2182 | ||
e6bff995 | 2183 | void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao) |
1da177e4 LT |
2184 | { |
2185 | struct prefix_info *pinfo; | |
2186 | __u32 valid_lft; | |
2187 | __u32 prefered_lft; | |
2188 | int addr_type; | |
1da177e4 | 2189 | struct inet6_dev *in6_dev; |
56d417b1 | 2190 | struct net *net = dev_net(dev); |
1da177e4 LT |
2191 | |
2192 | pinfo = (struct prefix_info *) opt; | |
1ab1457c | 2193 | |
1da177e4 | 2194 | if (len < sizeof(struct prefix_info)) { |
ba3542e1 | 2195 | ADBG("addrconf: prefix option too short\n"); |
1da177e4 LT |
2196 | return; |
2197 | } | |
1ab1457c | 2198 | |
1da177e4 LT |
2199 | /* |
2200 | * Validation checks ([ADDRCONF], page 19) | |
2201 | */ | |
2202 | ||
2203 | addr_type = ipv6_addr_type(&pinfo->prefix); | |
2204 | ||
2205 | if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) | |
2206 | return; | |
2207 | ||
2208 | valid_lft = ntohl(pinfo->valid); | |
2209 | prefered_lft = ntohl(pinfo->prefered); | |
2210 | ||
2211 | if (prefered_lft > valid_lft) { | |
e87cc472 | 2212 | net_warn_ratelimited("addrconf: prefix option has invalid lifetime\n"); |
1da177e4 LT |
2213 | return; |
2214 | } | |
2215 | ||
2216 | in6_dev = in6_dev_get(dev); | |
2217 | ||
2218 | if (in6_dev == NULL) { | |
e87cc472 JP |
2219 | net_dbg_ratelimited("addrconf: device %s not configured\n", |
2220 | dev->name); | |
1da177e4 LT |
2221 | return; |
2222 | } | |
2223 | ||
2224 | /* | |
2225 | * Two things going on here: | |
2226 | * 1) Add routes for on-link prefixes | |
2227 | * 2) Configure prefixes with the auto flag set | |
2228 | */ | |
2229 | ||
4bed72e4 YH |
2230 | if (pinfo->onlink) { |
2231 | struct rt6_info *rt; | |
2232 | unsigned long rt_expires; | |
2233 | ||
6f704992 YH |
2234 | /* Avoid arithmetic overflow. Really, we could |
2235 | * save rt_expires in seconds, likely valid_lft, | |
2236 | * but it would require division in fib gc, that it | |
2237 | * not good. | |
2238 | */ | |
4bed72e4 YH |
2239 | if (HZ > USER_HZ) |
2240 | rt_expires = addrconf_timeout_fixup(valid_lft, HZ); | |
2241 | else | |
2242 | rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ); | |
3dd4bc68 | 2243 | |
4bed72e4 YH |
2244 | if (addrconf_finite_timeout(rt_expires)) |
2245 | rt_expires *= HZ; | |
1da177e4 | 2246 | |
14ef37b6 AH |
2247 | rt = addrconf_get_prefix_route(&pinfo->prefix, |
2248 | pinfo->prefix_len, | |
2249 | dev, | |
2250 | RTF_ADDRCONF | RTF_PREFIX_RT, | |
2251 | RTF_GATEWAY | RTF_DEFAULT); | |
1da177e4 | 2252 | |
14ef37b6 | 2253 | if (rt) { |
6f704992 YH |
2254 | /* Autoconf prefix route */ |
2255 | if (valid_lft == 0) { | |
2256 | ip6_del_rt(rt); | |
2257 | rt = NULL; | |
4bed72e4 | 2258 | } else if (addrconf_finite_timeout(rt_expires)) { |
6f704992 | 2259 | /* not infinity */ |
1716a961 | 2260 | rt6_set_expires(rt, jiffies + rt_expires); |
6f704992 | 2261 | } else { |
1716a961 | 2262 | rt6_clean_expires(rt); |
1da177e4 LT |
2263 | } |
2264 | } else if (valid_lft) { | |
6f704992 | 2265 | clock_t expires = 0; |
4bed72e4 YH |
2266 | int flags = RTF_ADDRCONF | RTF_PREFIX_RT; |
2267 | if (addrconf_finite_timeout(rt_expires)) { | |
6f704992 YH |
2268 | /* not infinity */ |
2269 | flags |= RTF_EXPIRES; | |
2270 | expires = jiffies_to_clock_t(rt_expires); | |
2271 | } | |
1da177e4 | 2272 | addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, |
6f704992 | 2273 | dev, expires, flags); |
1da177e4 | 2274 | } |
94e187c0 | 2275 | ip6_rt_put(rt); |
1da177e4 LT |
2276 | } |
2277 | ||
2278 | /* Try to figure out our local address for this prefix */ | |
2279 | ||
2280 | if (pinfo->autoconf && in6_dev->cnf.autoconf) { | |
8e5e8f30 | 2281 | struct inet6_ifaddr *ifp; |
1da177e4 LT |
2282 | struct in6_addr addr; |
2283 | int create = 0, update_lft = 0; | |
617fe29d | 2284 | bool tokenized = false; |
1da177e4 LT |
2285 | |
2286 | if (pinfo->prefix_len == 64) { | |
2287 | memcpy(&addr, &pinfo->prefix, 8); | |
f53adae4 DB |
2288 | |
2289 | if (!ipv6_addr_any(&in6_dev->token)) { | |
2290 | read_lock_bh(&in6_dev->lock); | |
2291 | memcpy(addr.s6_addr + 8, | |
2292 | in6_dev->token.s6_addr + 8, 8); | |
2293 | read_unlock_bh(&in6_dev->lock); | |
617fe29d | 2294 | tokenized = true; |
f53adae4 DB |
2295 | } else if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && |
2296 | ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { | |
1da177e4 LT |
2297 | in6_dev_put(in6_dev); |
2298 | return; | |
2299 | } | |
2300 | goto ok; | |
2301 | } | |
e87cc472 JP |
2302 | net_dbg_ratelimited("IPv6 addrconf: prefix with wrong length %d\n", |
2303 | pinfo->prefix_len); | |
1da177e4 LT |
2304 | in6_dev_put(in6_dev); |
2305 | return; | |
2306 | ||
2307 | ok: | |
2308 | ||
53b7997f | 2309 | ifp = ipv6_get_ifaddr(net, &addr, dev, 1); |
1da177e4 LT |
2310 | |
2311 | if (ifp == NULL && valid_lft) { | |
2312 | int max_addresses = in6_dev->cnf.max_addresses; | |
95c385b4 NH |
2313 | u32 addr_flags = 0; |
2314 | ||
2315 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
2316 | if (in6_dev->cnf.optimistic_dad && | |
e6bff995 | 2317 | !net->ipv6.devconf_all->forwarding && sllao) |
95c385b4 NH |
2318 | addr_flags = IFA_F_OPTIMISTIC; |
2319 | #endif | |
1da177e4 LT |
2320 | |
2321 | /* Do not allow to create too much of autoconfigured | |
2322 | * addresses; this would be too easy way to crash kernel. | |
2323 | */ | |
2324 | if (!max_addresses || | |
2325 | ipv6_count_addresses(in6_dev) < max_addresses) | |
3f8f5298 JP |
2326 | ifp = ipv6_add_addr(in6_dev, &addr, NULL, |
2327 | pinfo->prefix_len, | |
95c385b4 | 2328 | addr_type&IPV6_ADDR_SCOPE_MASK, |
8a226b2c JB |
2329 | addr_flags, valid_lft, |
2330 | prefered_lft); | |
1da177e4 | 2331 | |
3f0d2ba0 | 2332 | if (IS_ERR_OR_NULL(ifp)) { |
1da177e4 LT |
2333 | in6_dev_put(in6_dev); |
2334 | return; | |
2335 | } | |
2336 | ||
8a226b2c JB |
2337 | update_lft = 0; |
2338 | create = 1; | |
c15b1cca HFS |
2339 | spin_lock_bh(&ifp->lock); |
2340 | ifp->flags |= IFA_F_MANAGETEMPADDR; | |
1da177e4 | 2341 | ifp->cstamp = jiffies; |
617fe29d | 2342 | ifp->tokenized = tokenized; |
c15b1cca | 2343 | spin_unlock_bh(&ifp->lock); |
cf22f9a2 | 2344 | addrconf_dad_start(ifp); |
1da177e4 LT |
2345 | } |
2346 | ||
2347 | if (ifp) { | |
479840ff | 2348 | u32 flags; |
1da177e4 | 2349 | unsigned long now; |
1da177e4 LT |
2350 | u32 stored_lft; |
2351 | ||
2352 | /* update lifetime (RFC2462 5.5.3 e) */ | |
2353 | spin_lock(&ifp->lock); | |
2354 | now = jiffies; | |
2355 | if (ifp->valid_lft > (now - ifp->tstamp) / HZ) | |
2356 | stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; | |
2357 | else | |
2358 | stored_lft = 0; | |
8a226b2c | 2359 | if (!update_lft && !create && stored_lft) { |
9451a304 FF |
2360 | const u32 minimum_lft = min_t(u32, |
2361 | stored_lft, MIN_VALID_LIFETIME); | |
c9d55d5b PM |
2362 | valid_lft = max(valid_lft, minimum_lft); |
2363 | ||
2364 | /* RFC4862 Section 5.5.3e: | |
2365 | * "Note that the preferred lifetime of the | |
2366 | * corresponding address is always reset to | |
2367 | * the Preferred Lifetime in the received | |
2368 | * Prefix Information option, regardless of | |
2369 | * whether the valid lifetime is also reset or | |
2370 | * ignored." | |
2371 | * | |
2372 | * So we should always update prefered_lft here. | |
2373 | */ | |
2374 | update_lft = 1; | |
1da177e4 LT |
2375 | } |
2376 | ||
2377 | if (update_lft) { | |
2378 | ifp->valid_lft = valid_lft; | |
2379 | ifp->prefered_lft = prefered_lft; | |
2380 | ifp->tstamp = now; | |
2381 | flags = ifp->flags; | |
2382 | ifp->flags &= ~IFA_F_DEPRECATED; | |
2383 | spin_unlock(&ifp->lock); | |
2384 | ||
2385 | if (!(flags&IFA_F_TENTATIVE)) | |
2386 | ipv6_ifa_notify(0, ifp); | |
2387 | } else | |
2388 | spin_unlock(&ifp->lock); | |
2389 | ||
53bd6749 JP |
2390 | manage_tempaddrs(in6_dev, ifp, valid_lft, prefered_lft, |
2391 | create, now); | |
5d9efa7e | 2392 | |
1da177e4 | 2393 | in6_ifa_put(ifp); |
c15b1cca | 2394 | addrconf_verify(); |
1da177e4 LT |
2395 | } |
2396 | } | |
2397 | inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); | |
2398 | in6_dev_put(in6_dev); | |
2399 | } | |
2400 | ||
2401 | /* | |
2402 | * Set destination address. | |
2403 | * Special case for SIT interfaces where we create a new "virtual" | |
2404 | * device. | |
2405 | */ | |
af284937 | 2406 | int addrconf_set_dstaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2407 | { |
2408 | struct in6_ifreq ireq; | |
2409 | struct net_device *dev; | |
2410 | int err = -EINVAL; | |
2411 | ||
2412 | rtnl_lock(); | |
2413 | ||
2414 | err = -EFAULT; | |
2415 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2416 | goto err_exit; | |
2417 | ||
af284937 | 2418 | dev = __dev_get_by_index(net, ireq.ifr6_ifindex); |
1da177e4 LT |
2419 | |
2420 | err = -ENODEV; | |
2421 | if (dev == NULL) | |
2422 | goto err_exit; | |
2423 | ||
07a93626 | 2424 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 | 2425 | if (dev->type == ARPHRD_SIT) { |
5bc3eb7e | 2426 | const struct net_device_ops *ops = dev->netdev_ops; |
1da177e4 | 2427 | struct ifreq ifr; |
1da177e4 LT |
2428 | struct ip_tunnel_parm p; |
2429 | ||
2430 | err = -EADDRNOTAVAIL; | |
2431 | if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) | |
2432 | goto err_exit; | |
2433 | ||
2434 | memset(&p, 0, sizeof(p)); | |
2435 | p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; | |
2436 | p.iph.saddr = 0; | |
2437 | p.iph.version = 4; | |
2438 | p.iph.ihl = 5; | |
2439 | p.iph.protocol = IPPROTO_IPV6; | |
2440 | p.iph.ttl = 64; | |
d20b3109 | 2441 | ifr.ifr_ifru.ifru_data = (__force void __user *)&p; |
1da177e4 | 2442 | |
5bc3eb7e SH |
2443 | if (ops->ndo_do_ioctl) { |
2444 | mm_segment_t oldfs = get_fs(); | |
2445 | ||
2446 | set_fs(KERNEL_DS); | |
2447 | err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL); | |
2448 | set_fs(oldfs); | |
2449 | } else | |
2450 | err = -EOPNOTSUPP; | |
1da177e4 LT |
2451 | |
2452 | if (err == 0) { | |
2453 | err = -ENOBUFS; | |
af284937 DL |
2454 | dev = __dev_get_by_name(net, p.name); |
2455 | if (!dev) | |
1da177e4 LT |
2456 | goto err_exit; |
2457 | err = dev_open(dev); | |
2458 | } | |
2459 | } | |
0be669bb | 2460 | #endif |
1da177e4 LT |
2461 | |
2462 | err_exit: | |
2463 | rtnl_unlock(); | |
2464 | return err; | |
2465 | } | |
2466 | ||
2467 | /* | |
2468 | * Manual configuration of address on an interface | |
2469 | */ | |
479840ff JP |
2470 | static int inet6_addr_add(struct net *net, int ifindex, |
2471 | const struct in6_addr *pfx, | |
caeaba79 | 2472 | const struct in6_addr *peer_pfx, |
479840ff JP |
2473 | unsigned int plen, __u32 ifa_flags, |
2474 | __u32 prefered_lft, __u32 valid_lft) | |
1da177e4 LT |
2475 | { |
2476 | struct inet6_ifaddr *ifp; | |
2477 | struct inet6_dev *idev; | |
2478 | struct net_device *dev; | |
2479 | int scope; | |
6f704992 YH |
2480 | u32 flags; |
2481 | clock_t expires; | |
4bed72e4 | 2482 | unsigned long timeout; |
1da177e4 LT |
2483 | |
2484 | ASSERT_RTNL(); | |
1ab1457c | 2485 | |
24ef0da7 TG |
2486 | if (plen > 128) |
2487 | return -EINVAL; | |
2488 | ||
0778769d NT |
2489 | /* check the lifetime */ |
2490 | if (!valid_lft || prefered_lft > valid_lft) | |
2491 | return -EINVAL; | |
2492 | ||
53bd6749 JP |
2493 | if (ifa_flags & IFA_F_MANAGETEMPADDR && plen != 64) |
2494 | return -EINVAL; | |
2495 | ||
af284937 DL |
2496 | dev = __dev_get_by_index(net, ifindex); |
2497 | if (!dev) | |
1da177e4 | 2498 | return -ENODEV; |
1ab1457c | 2499 | |
64e724f6 BH |
2500 | idev = addrconf_add_dev(dev); |
2501 | if (IS_ERR(idev)) | |
2502 | return PTR_ERR(idev); | |
1da177e4 LT |
2503 | |
2504 | scope = ipv6_addr_scope(pfx); | |
2505 | ||
4bed72e4 YH |
2506 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
2507 | if (addrconf_finite_timeout(timeout)) { | |
2508 | expires = jiffies_to_clock_t(timeout * HZ); | |
2509 | valid_lft = timeout; | |
6f704992 | 2510 | flags = RTF_EXPIRES; |
4bed72e4 YH |
2511 | } else { |
2512 | expires = 0; | |
2513 | flags = 0; | |
2514 | ifa_flags |= IFA_F_PERMANENT; | |
6f704992 | 2515 | } |
0778769d | 2516 | |
4bed72e4 YH |
2517 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
2518 | if (addrconf_finite_timeout(timeout)) { | |
2519 | if (timeout == 0) | |
2520 | ifa_flags |= IFA_F_DEPRECATED; | |
2521 | prefered_lft = timeout; | |
2522 | } | |
0778769d | 2523 | |
8a226b2c JB |
2524 | ifp = ipv6_add_addr(idev, pfx, peer_pfx, plen, scope, ifa_flags, |
2525 | valid_lft, prefered_lft); | |
0778769d | 2526 | |
1da177e4 | 2527 | if (!IS_ERR(ifp)) { |
761aac73 TH |
2528 | if (!(ifa_flags & IFA_F_NOPREFIXROUTE)) { |
2529 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, | |
2530 | expires, flags); | |
2531 | } | |
2532 | ||
95c385b4 NH |
2533 | /* |
2534 | * Note that section 3.1 of RFC 4429 indicates | |
2535 | * that the Optimistic flag should not be set for | |
2536 | * manually configured addresses | |
2537 | */ | |
cf22f9a2 | 2538 | addrconf_dad_start(ifp); |
53bd6749 JP |
2539 | if (ifa_flags & IFA_F_MANAGETEMPADDR) |
2540 | manage_tempaddrs(idev, ifp, valid_lft, prefered_lft, | |
2541 | true, jiffies); | |
1da177e4 | 2542 | in6_ifa_put(ifp); |
c15b1cca | 2543 | addrconf_verify_rtnl(); |
1da177e4 LT |
2544 | return 0; |
2545 | } | |
2546 | ||
2547 | return PTR_ERR(ifp); | |
2548 | } | |
2549 | ||
6046d5b4 HK |
2550 | static int inet6_addr_del(struct net *net, int ifindex, u32 ifa_flags, |
2551 | const struct in6_addr *pfx, unsigned int plen) | |
1da177e4 LT |
2552 | { |
2553 | struct inet6_ifaddr *ifp; | |
2554 | struct inet6_dev *idev; | |
2555 | struct net_device *dev; | |
1ab1457c | 2556 | |
24ef0da7 TG |
2557 | if (plen > 128) |
2558 | return -EINVAL; | |
2559 | ||
af284937 DL |
2560 | dev = __dev_get_by_index(net, ifindex); |
2561 | if (!dev) | |
1da177e4 LT |
2562 | return -ENODEV; |
2563 | ||
e5d08d71 IM |
2564 | idev = __in6_dev_get(dev); |
2565 | if (idev == NULL) | |
1da177e4 LT |
2566 | return -ENXIO; |
2567 | ||
2568 | read_lock_bh(&idev->lock); | |
502a2ffd | 2569 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
1da177e4 LT |
2570 | if (ifp->prefix_len == plen && |
2571 | ipv6_addr_equal(pfx, &ifp->addr)) { | |
2572 | in6_ifa_hold(ifp); | |
2573 | read_unlock_bh(&idev->lock); | |
1ab1457c | 2574 | |
6046d5b4 HK |
2575 | if (!(ifp->flags & IFA_F_TEMPORARY) && |
2576 | (ifa_flags & IFA_F_MANAGETEMPADDR)) | |
2577 | manage_tempaddrs(idev, ifp, 0, 0, false, | |
2578 | jiffies); | |
1da177e4 | 2579 | ipv6_del_addr(ifp); |
6046d5b4 | 2580 | addrconf_verify_rtnl(); |
1da177e4 LT |
2581 | return 0; |
2582 | } | |
2583 | } | |
2584 | read_unlock_bh(&idev->lock); | |
2585 | return -EADDRNOTAVAIL; | |
2586 | } | |
2587 | ||
2588 | ||
af284937 | 2589 | int addrconf_add_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2590 | { |
2591 | struct in6_ifreq ireq; | |
2592 | int err; | |
1ab1457c | 2593 | |
af31f412 | 2594 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 | 2595 | return -EPERM; |
1ab1457c | 2596 | |
1da177e4 LT |
2597 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
2598 | return -EFAULT; | |
2599 | ||
2600 | rtnl_lock(); | |
caeaba79 | 2601 | err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, NULL, |
af284937 DL |
2602 | ireq.ifr6_prefixlen, IFA_F_PERMANENT, |
2603 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); | |
1da177e4 LT |
2604 | rtnl_unlock(); |
2605 | return err; | |
2606 | } | |
2607 | ||
af284937 | 2608 | int addrconf_del_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2609 | { |
2610 | struct in6_ifreq ireq; | |
2611 | int err; | |
1ab1457c | 2612 | |
af31f412 | 2613 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 LT |
2614 | return -EPERM; |
2615 | ||
2616 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2617 | return -EFAULT; | |
2618 | ||
2619 | rtnl_lock(); | |
6046d5b4 | 2620 | err = inet6_addr_del(net, ireq.ifr6_ifindex, 0, &ireq.ifr6_addr, |
af284937 | 2621 | ireq.ifr6_prefixlen); |
1da177e4 LT |
2622 | rtnl_unlock(); |
2623 | return err; | |
2624 | } | |
2625 | ||
b5f348e5 IJ |
2626 | static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr, |
2627 | int plen, int scope) | |
2628 | { | |
2629 | struct inet6_ifaddr *ifp; | |
2630 | ||
8a226b2c | 2631 | ifp = ipv6_add_addr(idev, addr, NULL, plen, |
07edd741 HFS |
2632 | scope, IFA_F_PERMANENT, |
2633 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); | |
b5f348e5 IJ |
2634 | if (!IS_ERR(ifp)) { |
2635 | spin_lock_bh(&ifp->lock); | |
2636 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2637 | spin_unlock_bh(&ifp->lock); | |
2638 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2639 | in6_ifa_put(ifp); | |
2640 | } | |
2641 | } | |
2642 | ||
07a93626 | 2643 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 LT |
2644 | static void sit_add_v4_addrs(struct inet6_dev *idev) |
2645 | { | |
1da177e4 LT |
2646 | struct in6_addr addr; |
2647 | struct net_device *dev; | |
c346dca1 | 2648 | struct net *net = dev_net(idev->dev); |
929c9cf3 | 2649 | int scope, plen; |
f0e2acfa | 2650 | u32 pflags = 0; |
1da177e4 LT |
2651 | |
2652 | ASSERT_RTNL(); | |
2653 | ||
2654 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2655 | memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); | |
2656 | ||
2657 | if (idev->dev->flags&IFF_POINTOPOINT) { | |
2658 | addr.s6_addr32[0] = htonl(0xfe800000); | |
2659 | scope = IFA_LINK; | |
929c9cf3 | 2660 | plen = 64; |
1da177e4 LT |
2661 | } else { |
2662 | scope = IPV6_ADDR_COMPATv4; | |
929c9cf3 | 2663 | plen = 96; |
f0e2acfa | 2664 | pflags |= RTF_NONEXTHOP; |
1da177e4 LT |
2665 | } |
2666 | ||
2667 | if (addr.s6_addr32[3]) { | |
929c9cf3 | 2668 | add_addr(idev, &addr, plen, scope); |
f0e2acfa | 2669 | addrconf_prefix_route(&addr, plen, idev->dev, 0, pflags); |
1da177e4 LT |
2670 | return; |
2671 | } | |
2672 | ||
6fda7350 | 2673 | for_each_netdev(net, dev) { |
8e5e8f30 | 2674 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
1da177e4 | 2675 | if (in_dev && (dev->flags & IFF_UP)) { |
8e5e8f30 | 2676 | struct in_ifaddr *ifa; |
1da177e4 LT |
2677 | |
2678 | int flag = scope; | |
2679 | ||
2680 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { | |
1da177e4 LT |
2681 | |
2682 | addr.s6_addr32[3] = ifa->ifa_local; | |
2683 | ||
2684 | if (ifa->ifa_scope == RT_SCOPE_LINK) | |
2685 | continue; | |
2686 | if (ifa->ifa_scope >= RT_SCOPE_HOST) { | |
2687 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2688 | continue; | |
2689 | flag |= IFA_HOST; | |
2690 | } | |
1da177e4 | 2691 | |
b5f348e5 | 2692 | add_addr(idev, &addr, plen, flag); |
f0e2acfa ND |
2693 | addrconf_prefix_route(&addr, plen, idev->dev, 0, |
2694 | pflags); | |
1da177e4 LT |
2695 | } |
2696 | } | |
1ab1457c | 2697 | } |
1da177e4 | 2698 | } |
0be669bb | 2699 | #endif |
1da177e4 LT |
2700 | |
2701 | static void init_loopback(struct net_device *dev) | |
2702 | { | |
2703 | struct inet6_dev *idev; | |
25fb6ca4 BK |
2704 | struct net_device *sp_dev; |
2705 | struct inet6_ifaddr *sp_ifa; | |
2706 | struct rt6_info *sp_rt; | |
1da177e4 LT |
2707 | |
2708 | /* ::1 */ | |
2709 | ||
2710 | ASSERT_RTNL(); | |
2711 | ||
e5d08d71 IM |
2712 | idev = ipv6_find_idev(dev); |
2713 | if (idev == NULL) { | |
91df42be | 2714 | pr_debug("%s: add_dev failed\n", __func__); |
1da177e4 LT |
2715 | return; |
2716 | } | |
2717 | ||
b5f348e5 | 2718 | add_addr(idev, &in6addr_loopback, 128, IFA_HOST); |
25fb6ca4 BK |
2719 | |
2720 | /* Add routes to other interface's IPv6 addresses */ | |
2721 | for_each_netdev(dev_net(dev), sp_dev) { | |
2722 | if (!strcmp(sp_dev->name, dev->name)) | |
2723 | continue; | |
2724 | ||
2725 | idev = __in6_dev_get(sp_dev); | |
2726 | if (!idev) | |
2727 | continue; | |
2728 | ||
2729 | read_lock_bh(&idev->lock); | |
2730 | list_for_each_entry(sp_ifa, &idev->addr_list, if_list) { | |
2731 | ||
2732 | if (sp_ifa->flags & (IFA_F_DADFAILED | IFA_F_TENTATIVE)) | |
2733 | continue; | |
2734 | ||
33d99113 G |
2735 | if (sp_ifa->rt) { |
2736 | /* This dst has been added to garbage list when | |
2737 | * lo device down, release this obsolete dst and | |
2738 | * reallocate a new router for ifa. | |
2739 | */ | |
2740 | if (sp_ifa->rt->dst.obsolete > 0) { | |
2741 | ip6_rt_put(sp_ifa->rt); | |
2742 | sp_ifa->rt = NULL; | |
2743 | } else { | |
2744 | continue; | |
2745 | } | |
2746 | } | |
a881ae1f | 2747 | |
57ec0afe | 2748 | sp_rt = addrconf_dst_alloc(idev, &sp_ifa->addr, false); |
25fb6ca4 BK |
2749 | |
2750 | /* Failure cases are ignored */ | |
534c8779 G |
2751 | if (!IS_ERR(sp_rt)) { |
2752 | sp_ifa->rt = sp_rt; | |
25fb6ca4 | 2753 | ip6_ins_rt(sp_rt); |
534c8779 | 2754 | } |
25fb6ca4 BK |
2755 | } |
2756 | read_unlock_bh(&idev->lock); | |
2757 | } | |
1da177e4 LT |
2758 | } |
2759 | ||
b71d1d42 | 2760 | static void addrconf_add_linklocal(struct inet6_dev *idev, const struct in6_addr *addr) |
1da177e4 | 2761 | { |
8e5e8f30 | 2762 | struct inet6_ifaddr *ifp; |
95c385b4 NH |
2763 | u32 addr_flags = IFA_F_PERMANENT; |
2764 | ||
2765 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
2766 | if (idev->cnf.optimistic_dad && | |
702beb87 | 2767 | !dev_net(idev->dev)->ipv6.devconf_all->forwarding) |
95c385b4 NH |
2768 | addr_flags |= IFA_F_OPTIMISTIC; |
2769 | #endif | |
1da177e4 | 2770 | |
95c385b4 | 2771 | |
07edd741 HFS |
2772 | ifp = ipv6_add_addr(idev, addr, NULL, 64, IFA_LINK, addr_flags, |
2773 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); | |
1da177e4 | 2774 | if (!IS_ERR(ifp)) { |
46d48046 | 2775 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0); |
cf22f9a2 | 2776 | addrconf_dad_start(ifp); |
1da177e4 LT |
2777 | in6_ifa_put(ifp); |
2778 | } | |
2779 | } | |
2780 | ||
bc91b0f0 JP |
2781 | static void addrconf_addr_gen(struct inet6_dev *idev, bool prefix_route) |
2782 | { | |
2783 | if (idev->addr_gen_mode == IN6_ADDR_GEN_MODE_EUI64) { | |
2784 | struct in6_addr addr; | |
2785 | ||
2786 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
2787 | /* addrconf_add_linklocal also adds a prefix_route and we | |
2788 | * only need to care about prefix routes if ipv6_generate_eui64 | |
2789 | * couldn't generate one. | |
2790 | */ | |
2791 | if (ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) == 0) | |
2792 | addrconf_add_linklocal(idev, &addr); | |
2793 | else if (prefix_route) | |
2794 | addrconf_prefix_route(&addr, 64, idev->dev, 0, 0); | |
2795 | } | |
2796 | } | |
2797 | ||
1da177e4 LT |
2798 | static void addrconf_dev_config(struct net_device *dev) |
2799 | { | |
8e5e8f30 | 2800 | struct inet6_dev *idev; |
1da177e4 LT |
2801 | |
2802 | ASSERT_RTNL(); | |
2803 | ||
74235a25 HX |
2804 | if ((dev->type != ARPHRD_ETHER) && |
2805 | (dev->type != ARPHRD_FDDI) && | |
74235a25 | 2806 | (dev->type != ARPHRD_ARCNET) && |
06a4c1c5 | 2807 | (dev->type != ARPHRD_INFINIBAND) && |
cb6bf355 | 2808 | (dev->type != ARPHRD_IEEE802154) && |
e837735e | 2809 | (dev->type != ARPHRD_IEEE1394) && |
e74bccb8 JR |
2810 | (dev->type != ARPHRD_TUNNEL6) && |
2811 | (dev->type != ARPHRD_6LOWPAN)) { | |
74235a25 HX |
2812 | /* Alas, we support only Ethernet autoconfiguration. */ |
2813 | return; | |
2814 | } | |
2815 | ||
1da177e4 | 2816 | idev = addrconf_add_dev(dev); |
64e724f6 | 2817 | if (IS_ERR(idev)) |
1da177e4 LT |
2818 | return; |
2819 | ||
bc91b0f0 | 2820 | addrconf_addr_gen(idev, false); |
1da177e4 LT |
2821 | } |
2822 | ||
07a93626 | 2823 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 LT |
2824 | static void addrconf_sit_config(struct net_device *dev) |
2825 | { | |
2826 | struct inet6_dev *idev; | |
2827 | ||
2828 | ASSERT_RTNL(); | |
2829 | ||
1ab1457c YH |
2830 | /* |
2831 | * Configure the tunnel with one of our IPv4 | |
2832 | * addresses... we should configure all of | |
1da177e4 LT |
2833 | * our v4 addrs in the tunnel |
2834 | */ | |
2835 | ||
e5d08d71 IM |
2836 | idev = ipv6_find_idev(dev); |
2837 | if (idev == NULL) { | |
91df42be | 2838 | pr_debug("%s: add_dev failed\n", __func__); |
1da177e4 LT |
2839 | return; |
2840 | } | |
2841 | ||
c7dc89c0 | 2842 | if (dev->priv_flags & IFF_ISATAP) { |
bc91b0f0 | 2843 | addrconf_addr_gen(idev, false); |
c7dc89c0 FT |
2844 | return; |
2845 | } | |
2846 | ||
1da177e4 LT |
2847 | sit_add_v4_addrs(idev); |
2848 | ||
62b54dd9 | 2849 | if (dev->flags&IFF_POINTOPOINT) |
1da177e4 | 2850 | addrconf_add_mroute(dev); |
1da177e4 | 2851 | } |
0be669bb | 2852 | #endif |
1da177e4 | 2853 | |
07a93626 | 2854 | #if IS_ENABLED(CONFIG_NET_IPGRE) |
aee80b54 | 2855 | static void addrconf_gre_config(struct net_device *dev) |
2856 | { | |
2857 | struct inet6_dev *idev; | |
aee80b54 | 2858 | |
aee80b54 | 2859 | ASSERT_RTNL(); |
2860 | ||
e5d08d71 IM |
2861 | idev = ipv6_find_idev(dev); |
2862 | if (idev == NULL) { | |
91df42be | 2863 | pr_debug("%s: add_dev failed\n", __func__); |
aee80b54 | 2864 | return; |
2865 | } | |
2866 | ||
bc91b0f0 | 2867 | addrconf_addr_gen(idev, true); |
aee80b54 | 2868 | } |
2869 | #endif | |
2870 | ||
1ab1457c | 2871 | static int addrconf_notify(struct notifier_block *this, unsigned long event, |
351638e7 | 2872 | void *ptr) |
1da177e4 | 2873 | { |
351638e7 | 2874 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
748e2d93 | 2875 | struct inet6_dev *idev = __in6_dev_get(dev); |
c5e33bdd | 2876 | int run_pending = 0; |
b217d616 | 2877 | int err; |
1da177e4 | 2878 | |
e21e8467 | 2879 | switch (event) { |
45ba9dd2 | 2880 | case NETDEV_REGISTER: |
74235a25 | 2881 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
45ba9dd2 | 2882 | idev = ipv6_add_dev(dev); |
a317a2f1 WC |
2883 | if (IS_ERR(idev)) |
2884 | return notifier_from_errno(PTR_ERR(idev)); | |
45ba9dd2 YH |
2885 | } |
2886 | break; | |
bcdd553f | 2887 | |
1da177e4 | 2888 | case NETDEV_UP: |
3c21edbd | 2889 | case NETDEV_CHANGE: |
c2edacf8 JV |
2890 | if (dev->flags & IFF_SLAVE) |
2891 | break; | |
2892 | ||
3ce62a84 WC |
2893 | if (idev && idev->cnf.disable_ipv6) |
2894 | break; | |
2895 | ||
3c21edbd | 2896 | if (event == NETDEV_UP) { |
f24e3d65 | 2897 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd | 2898 | /* device is not ready yet. */ |
f3213831 | 2899 | pr_info("ADDRCONF(NETDEV_UP): %s: link is not ready\n", |
3c21edbd YH |
2900 | dev->name); |
2901 | break; | |
2902 | } | |
99081049 | 2903 | |
d31c7b8f EP |
2904 | if (!idev && dev->mtu >= IPV6_MIN_MTU) |
2905 | idev = ipv6_add_dev(dev); | |
2906 | ||
a317a2f1 | 2907 | if (!IS_ERR_OR_NULL(idev)) { |
99081049 | 2908 | idev->if_flags |= IF_READY; |
e3ec6cfc BT |
2909 | run_pending = 1; |
2910 | } | |
3c21edbd | 2911 | } else { |
f24e3d65 | 2912 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd YH |
2913 | /* device is still not ready. */ |
2914 | break; | |
2915 | } | |
2916 | ||
2917 | if (idev) { | |
bcdd553f | 2918 | if (idev->if_flags & IF_READY) |
3c21edbd YH |
2919 | /* device is already configured. */ |
2920 | break; | |
3c21edbd YH |
2921 | idev->if_flags |= IF_READY; |
2922 | } | |
2923 | ||
f3213831 JP |
2924 | pr_info("ADDRCONF(NETDEV_CHANGE): %s: link becomes ready\n", |
2925 | dev->name); | |
3c21edbd | 2926 | |
c5e33bdd | 2927 | run_pending = 1; |
3c21edbd YH |
2928 | } |
2929 | ||
e21e8467 | 2930 | switch (dev->type) { |
07a93626 | 2931 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 LT |
2932 | case ARPHRD_SIT: |
2933 | addrconf_sit_config(dev); | |
2934 | break; | |
aee80b54 | 2935 | #endif |
07a93626 | 2936 | #if IS_ENABLED(CONFIG_NET_IPGRE) |
aee80b54 | 2937 | case ARPHRD_IPGRE: |
2938 | addrconf_gre_config(dev); | |
2939 | break; | |
0be669bb | 2940 | #endif |
1da177e4 LT |
2941 | case ARPHRD_LOOPBACK: |
2942 | init_loopback(dev); | |
2943 | break; | |
2944 | ||
2945 | default: | |
2946 | addrconf_dev_config(dev); | |
2947 | break; | |
3ff50b79 | 2948 | } |
bcdd553f | 2949 | |
a317a2f1 | 2950 | if (!IS_ERR_OR_NULL(idev)) { |
c5e33bdd YH |
2951 | if (run_pending) |
2952 | addrconf_dad_run(idev); | |
2953 | ||
bcdd553f SH |
2954 | /* |
2955 | * If the MTU changed during the interface down, | |
2956 | * when the interface up, the changed MTU must be | |
2957 | * reflected in the idev as well as routers. | |
1da177e4 | 2958 | */ |
bcdd553f SH |
2959 | if (idev->cnf.mtu6 != dev->mtu && |
2960 | dev->mtu >= IPV6_MIN_MTU) { | |
1da177e4 LT |
2961 | rt6_mtu_change(dev, dev->mtu); |
2962 | idev->cnf.mtu6 = dev->mtu; | |
2963 | } | |
2964 | idev->tstamp = jiffies; | |
2965 | inet6_ifinfo_notify(RTM_NEWLINK, idev); | |
bcdd553f SH |
2966 | |
2967 | /* | |
2968 | * If the changed mtu during down is lower than | |
2969 | * IPV6_MIN_MTU stop IPv6 on this interface. | |
1da177e4 LT |
2970 | */ |
2971 | if (dev->mtu < IPV6_MIN_MTU) | |
bcdd553f | 2972 | addrconf_ifdown(dev, 1); |
1da177e4 LT |
2973 | } |
2974 | break; | |
2975 | ||
2976 | case NETDEV_CHANGEMTU: | |
d31c7b8f | 2977 | if (idev && dev->mtu >= IPV6_MIN_MTU) { |
1da177e4 LT |
2978 | rt6_mtu_change(dev, dev->mtu); |
2979 | idev->cnf.mtu6 = dev->mtu; | |
2980 | break; | |
2981 | } | |
2982 | ||
d31c7b8f EP |
2983 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
2984 | idev = ipv6_add_dev(dev); | |
a317a2f1 | 2985 | if (!IS_ERR(idev)) |
d31c7b8f EP |
2986 | break; |
2987 | } | |
2988 | ||
bcdd553f | 2989 | /* |
db9c7c39 | 2990 | * if MTU under IPV6_MIN_MTU. |
bcdd553f SH |
2991 | * Stop IPv6 on this interface. |
2992 | */ | |
1da177e4 LT |
2993 | |
2994 | case NETDEV_DOWN: | |
2995 | case NETDEV_UNREGISTER: | |
2996 | /* | |
2997 | * Remove all addresses from this interface. | |
2998 | */ | |
2999 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
3000 | break; | |
3c21edbd | 3001 | |
1da177e4 | 3002 | case NETDEV_CHANGENAME: |
1da177e4 | 3003 | if (idev) { |
5632c515 | 3004 | snmp6_unregister_dev(idev); |
408c4768 | 3005 | addrconf_sysctl_unregister(idev); |
a317a2f1 | 3006 | err = addrconf_sysctl_register(idev); |
b217d616 HX |
3007 | if (err) |
3008 | return notifier_from_errno(err); | |
a317a2f1 WC |
3009 | err = snmp6_register_dev(idev); |
3010 | if (err) { | |
3011 | addrconf_sysctl_unregister(idev); | |
3012 | return notifier_from_errno(err); | |
3013 | } | |
5632c515 | 3014 | } |
1da177e4 | 3015 | break; |
bcdd553f | 3016 | |
93d9b7d7 JP |
3017 | case NETDEV_PRE_TYPE_CHANGE: |
3018 | case NETDEV_POST_TYPE_CHANGE: | |
3019 | addrconf_type_change(dev, event); | |
75c78500 | 3020 | break; |
3ff50b79 | 3021 | } |
1da177e4 LT |
3022 | |
3023 | return NOTIFY_OK; | |
3024 | } | |
3025 | ||
3026 | /* | |
3027 | * addrconf module should be notified of a device going up | |
3028 | */ | |
3029 | static struct notifier_block ipv6_dev_notf = { | |
3030 | .notifier_call = addrconf_notify, | |
1da177e4 LT |
3031 | }; |
3032 | ||
93d9b7d7 | 3033 | static void addrconf_type_change(struct net_device *dev, unsigned long event) |
75c78500 MS |
3034 | { |
3035 | struct inet6_dev *idev; | |
3036 | ASSERT_RTNL(); | |
3037 | ||
3038 | idev = __in6_dev_get(dev); | |
3039 | ||
93d9b7d7 | 3040 | if (event == NETDEV_POST_TYPE_CHANGE) |
75c78500 | 3041 | ipv6_mc_remap(idev); |
93d9b7d7 | 3042 | else if (event == NETDEV_PRE_TYPE_CHANGE) |
75c78500 MS |
3043 | ipv6_mc_unmap(idev); |
3044 | } | |
3045 | ||
1da177e4 LT |
3046 | static int addrconf_ifdown(struct net_device *dev, int how) |
3047 | { | |
c346dca1 | 3048 | struct net *net = dev_net(dev); |
502a2ffd | 3049 | struct inet6_dev *idev; |
3050 | struct inet6_ifaddr *ifa; | |
73a8bd74 | 3051 | int state, i; |
1da177e4 LT |
3052 | |
3053 | ASSERT_RTNL(); | |
3054 | ||
73a8bd74 DM |
3055 | rt6_ifdown(net, dev); |
3056 | neigh_ifdown(&nd_tbl, dev); | |
1da177e4 LT |
3057 | |
3058 | idev = __in6_dev_get(dev); | |
3059 | if (idev == NULL) | |
3060 | return -ENODEV; | |
3061 | ||
bcdd553f SH |
3062 | /* |
3063 | * Step 1: remove reference to ipv6 device from parent device. | |
3064 | * Do not dev_put! | |
1da177e4 | 3065 | */ |
439e2385 | 3066 | if (how) { |
1da177e4 | 3067 | idev->dead = 1; |
8814c4b5 YH |
3068 | |
3069 | /* protected by rtnl_lock */ | |
a9b3cd7f | 3070 | RCU_INIT_POINTER(dev->ip6_ptr, NULL); |
1da177e4 LT |
3071 | |
3072 | /* Step 1.5: remove snmp6 entry */ | |
3073 | snmp6_unregister_dev(idev); | |
3074 | ||
3075 | } | |
3076 | ||
73a8bd74 DM |
3077 | /* Step 2: clear hash table */ |
3078 | for (i = 0; i < IN6_ADDR_HSIZE; i++) { | |
3079 | struct hlist_head *h = &inet6_addr_lst[i]; | |
73a8bd74 DM |
3080 | |
3081 | spin_lock_bh(&addrconf_hash_lock); | |
67ba4152 | 3082 | restart: |
b67bfe0d | 3083 | hlist_for_each_entry_rcu(ifa, h, addr_lst) { |
73a8bd74 DM |
3084 | if (ifa->idev == idev) { |
3085 | hlist_del_init_rcu(&ifa->addr_lst); | |
c15b1cca | 3086 | addrconf_del_dad_work(ifa); |
73a8bd74 DM |
3087 | goto restart; |
3088 | } | |
3089 | } | |
3090 | spin_unlock_bh(&addrconf_hash_lock); | |
3091 | } | |
3092 | ||
1da177e4 LT |
3093 | write_lock_bh(&idev->lock); |
3094 | ||
b7b1bfce HFS |
3095 | addrconf_del_rs_timer(idev); |
3096 | ||
bcdd553f | 3097 | /* Step 2: clear flags for stateless addrconf */ |
439e2385 | 3098 | if (!how) |
3c21edbd | 3099 | idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); |
1da177e4 | 3100 | |
439e2385 | 3101 | if (how && del_timer(&idev->regen_timer)) |
1da177e4 LT |
3102 | in6_dev_put(idev); |
3103 | ||
bcdd553f | 3104 | /* Step 3: clear tempaddr list */ |
372e6c8f | 3105 | while (!list_empty(&idev->tempaddr_list)) { |
3106 | ifa = list_first_entry(&idev->tempaddr_list, | |
3107 | struct inet6_ifaddr, tmp_list); | |
3108 | list_del(&ifa->tmp_list); | |
1da177e4 LT |
3109 | write_unlock_bh(&idev->lock); |
3110 | spin_lock_bh(&ifa->lock); | |
3111 | ||
3112 | if (ifa->ifpub) { | |
3113 | in6_ifa_put(ifa->ifpub); | |
3114 | ifa->ifpub = NULL; | |
3115 | } | |
3116 | spin_unlock_bh(&ifa->lock); | |
3117 | in6_ifa_put(ifa); | |
3118 | write_lock_bh(&idev->lock); | |
3119 | } | |
8f37ada5 | 3120 | |
502a2ffd | 3121 | while (!list_empty(&idev->addr_list)) { |
3122 | ifa = list_first_entry(&idev->addr_list, | |
3123 | struct inet6_ifaddr, if_list); | |
c15b1cca | 3124 | addrconf_del_dad_work(ifa); |
84e8b803 | 3125 | |
73a8bd74 | 3126 | list_del(&ifa->if_list); |
84e8b803 | 3127 | |
73a8bd74 | 3128 | write_unlock_bh(&idev->lock); |
84e8b803 | 3129 | |
73a8bd74 DM |
3130 | spin_lock_bh(&ifa->state_lock); |
3131 | state = ifa->state; | |
3132 | ifa->state = INET6_IFADDR_STATE_DEAD; | |
3133 | spin_unlock_bh(&ifa->state_lock); | |
9d82ca98 | 3134 | |
73a8bd74 DM |
3135 | if (state != INET6_IFADDR_STATE_DEAD) { |
3136 | __ipv6_ifa_notify(RTM_DELADDR, ifa); | |
f88c91dd | 3137 | inet6addr_notifier_call_chain(NETDEV_DOWN, ifa); |
27bdb2ab | 3138 | } |
73a8bd74 | 3139 | in6_ifa_put(ifa); |
8f37ada5 | 3140 | |
73a8bd74 DM |
3141 | write_lock_bh(&idev->lock); |
3142 | } | |
8f37ada5 | 3143 | |
1da177e4 LT |
3144 | write_unlock_bh(&idev->lock); |
3145 | ||
381f4dca SD |
3146 | /* Step 5: Discard anycast and multicast list */ |
3147 | if (how) { | |
3148 | ipv6_ac_destroy_dev(idev); | |
1da177e4 | 3149 | ipv6_mc_destroy_dev(idev); |
381f4dca | 3150 | } else { |
1da177e4 | 3151 | ipv6_mc_down(idev); |
381f4dca | 3152 | } |
1da177e4 | 3153 | |
1da177e4 | 3154 | idev->tstamp = jiffies; |
1ab1457c | 3155 | |
bcdd553f | 3156 | /* Last: Shot the device (if unregistered) */ |
439e2385 | 3157 | if (how) { |
408c4768 | 3158 | addrconf_sysctl_unregister(idev); |
1da177e4 LT |
3159 | neigh_parms_release(&nd_tbl, idev->nd_parms); |
3160 | neigh_ifdown(&nd_tbl, dev); | |
3161 | in6_dev_put(idev); | |
3162 | } | |
3163 | return 0; | |
3164 | } | |
3165 | ||
3166 | static void addrconf_rs_timer(unsigned long data) | |
3167 | { | |
b7b1bfce | 3168 | struct inet6_dev *idev = (struct inet6_dev *)data; |
caf92bc4 | 3169 | struct net_device *dev = idev->dev; |
b7b1bfce | 3170 | struct in6_addr lladdr; |
1da177e4 | 3171 | |
b7b1bfce | 3172 | write_lock(&idev->lock); |
5b2a1953 | 3173 | if (idev->dead || !(idev->if_flags & IF_READY)) |
1da177e4 LT |
3174 | goto out; |
3175 | ||
9ba2add3 | 3176 | if (!ipv6_accept_ra(idev)) |
5b2a1953 | 3177 | goto out; |
3178 | ||
3179 | /* Announcement received after solicitation was sent */ | |
3180 | if (idev->if_flags & IF_RA_RCVD) | |
1da177e4 | 3181 | goto out; |
1da177e4 | 3182 | |
b7b1bfce | 3183 | if (idev->rs_probes++ < idev->cnf.rtr_solicits) { |
caf92bc4 CW |
3184 | write_unlock(&idev->lock); |
3185 | if (!ipv6_get_lladdr(dev, &lladdr, IFA_F_TENTATIVE)) | |
3186 | ndisc_send_rs(dev, &lladdr, | |
b7b1bfce HFS |
3187 | &in6addr_linklocal_allrouters); |
3188 | else | |
caf92bc4 | 3189 | goto put; |
1da177e4 | 3190 | |
caf92bc4 | 3191 | write_lock(&idev->lock); |
b7b1bfce HFS |
3192 | /* The wait after the last probe can be shorter */ |
3193 | addrconf_mod_rs_timer(idev, (idev->rs_probes == | |
3194 | idev->cnf.rtr_solicits) ? | |
3195 | idev->cnf.rtr_solicit_delay : | |
3196 | idev->cnf.rtr_solicit_interval); | |
1da177e4 | 3197 | } else { |
1da177e4 LT |
3198 | /* |
3199 | * Note: we do not support deprecated "all on-link" | |
3200 | * assumption any longer. | |
3201 | */ | |
91df42be | 3202 | pr_debug("%s: no IPv6 routers present\n", idev->dev->name); |
1da177e4 LT |
3203 | } |
3204 | ||
3205 | out: | |
b7b1bfce | 3206 | write_unlock(&idev->lock); |
caf92bc4 | 3207 | put: |
b7b1bfce | 3208 | in6_dev_put(idev); |
1da177e4 LT |
3209 | } |
3210 | ||
3211 | /* | |
3212 | * Duplicate Address Detection | |
3213 | */ | |
3c21edbd YH |
3214 | static void addrconf_dad_kick(struct inet6_ifaddr *ifp) |
3215 | { | |
3216 | unsigned long rand_num; | |
3217 | struct inet6_dev *idev = ifp->idev; | |
3218 | ||
95c385b4 NH |
3219 | if (ifp->flags & IFA_F_OPTIMISTIC) |
3220 | rand_num = 0; | |
3221 | else | |
63862b5b | 3222 | rand_num = prandom_u32() % (idev->cnf.rtr_solicit_delay ? : 1); |
95c385b4 | 3223 | |
b7b1bfce | 3224 | ifp->dad_probes = idev->cnf.dad_transmits; |
c15b1cca | 3225 | addrconf_mod_dad_work(ifp, rand_num); |
3c21edbd YH |
3226 | } |
3227 | ||
c15b1cca | 3228 | static void addrconf_dad_begin(struct inet6_ifaddr *ifp) |
1da177e4 LT |
3229 | { |
3230 | struct inet6_dev *idev = ifp->idev; | |
3231 | struct net_device *dev = idev->dev; | |
1da177e4 LT |
3232 | |
3233 | addrconf_join_solict(dev, &ifp->addr); | |
3234 | ||
63862b5b | 3235 | prandom_seed((__force u32) ifp->addr.s6_addr32[3]); |
1da177e4 LT |
3236 | |
3237 | read_lock_bh(&idev->lock); | |
622ccdf1 | 3238 | spin_lock(&ifp->lock); |
e9d3e084 | 3239 | if (ifp->state == INET6_IFADDR_STATE_DEAD) |
1da177e4 | 3240 | goto out; |
1da177e4 LT |
3241 | |
3242 | if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || | |
1b34be74 | 3243 | idev->cnf.accept_dad < 1 || |
55ebaef1 NT |
3244 | !(ifp->flags&IFA_F_TENTATIVE) || |
3245 | ifp->flags & IFA_F_NODAD) { | |
cc411d0b | 3246 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
21809faf | 3247 | spin_unlock(&ifp->lock); |
1da177e4 LT |
3248 | read_unlock_bh(&idev->lock); |
3249 | ||
3250 | addrconf_dad_completed(ifp); | |
3251 | return; | |
3252 | } | |
3253 | ||
6732bade | 3254 | if (!(idev->if_flags & IF_READY)) { |
21809faf | 3255 | spin_unlock(&ifp->lock); |
6732bade | 3256 | read_unlock_bh(&idev->lock); |
3c21edbd | 3257 | /* |
590a9887 | 3258 | * If the device is not ready: |
3c21edbd YH |
3259 | * - keep it tentative if it is a permanent address. |
3260 | * - otherwise, kill it. | |
3261 | */ | |
3262 | in6_ifa_hold(ifp); | |
cc411d0b | 3263 | addrconf_dad_stop(ifp, 0); |
6732bade | 3264 | return; |
3c21edbd | 3265 | } |
95c385b4 NH |
3266 | |
3267 | /* | |
3268 | * Optimistic nodes can start receiving | |
3269 | * Frames right away | |
3270 | */ | |
7fd2561e | 3271 | if (ifp->flags & IFA_F_OPTIMISTIC) { |
95c385b4 | 3272 | ip6_ins_rt(ifp->rt); |
7fd2561e EK |
3273 | if (ipv6_use_optimistic_addr(idev)) { |
3274 | /* Because optimistic nodes can use this address, | |
3275 | * notify listeners. If DAD fails, RTM_DELADDR is sent. | |
3276 | */ | |
3277 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
3278 | } | |
3279 | } | |
95c385b4 | 3280 | |
6732bade | 3281 | addrconf_dad_kick(ifp); |
1da177e4 | 3282 | out: |
622ccdf1 | 3283 | spin_unlock(&ifp->lock); |
1da177e4 LT |
3284 | read_unlock_bh(&idev->lock); |
3285 | } | |
3286 | ||
c15b1cca | 3287 | static void addrconf_dad_start(struct inet6_ifaddr *ifp) |
1da177e4 | 3288 | { |
c15b1cca HFS |
3289 | bool begin_dad = false; |
3290 | ||
3291 | spin_lock_bh(&ifp->state_lock); | |
3292 | if (ifp->state != INET6_IFADDR_STATE_DEAD) { | |
3293 | ifp->state = INET6_IFADDR_STATE_PREDAD; | |
3294 | begin_dad = true; | |
3295 | } | |
3296 | spin_unlock_bh(&ifp->state_lock); | |
3297 | ||
3298 | if (begin_dad) | |
3299 | addrconf_mod_dad_work(ifp, 0); | |
3300 | } | |
3301 | ||
3302 | static void addrconf_dad_work(struct work_struct *w) | |
3303 | { | |
3304 | struct inet6_ifaddr *ifp = container_of(to_delayed_work(w), | |
3305 | struct inet6_ifaddr, | |
3306 | dad_work); | |
1da177e4 | 3307 | struct inet6_dev *idev = ifp->idev; |
1da177e4 LT |
3308 | struct in6_addr mcaddr; |
3309 | ||
c15b1cca HFS |
3310 | enum { |
3311 | DAD_PROCESS, | |
3312 | DAD_BEGIN, | |
3313 | DAD_ABORT, | |
3314 | } action = DAD_PROCESS; | |
3315 | ||
3316 | rtnl_lock(); | |
3317 | ||
3318 | spin_lock_bh(&ifp->state_lock); | |
3319 | if (ifp->state == INET6_IFADDR_STATE_PREDAD) { | |
3320 | action = DAD_BEGIN; | |
3321 | ifp->state = INET6_IFADDR_STATE_DAD; | |
3322 | } else if (ifp->state == INET6_IFADDR_STATE_ERRDAD) { | |
3323 | action = DAD_ABORT; | |
3324 | ifp->state = INET6_IFADDR_STATE_POSTDAD; | |
3325 | } | |
3326 | spin_unlock_bh(&ifp->state_lock); | |
3327 | ||
3328 | if (action == DAD_BEGIN) { | |
3329 | addrconf_dad_begin(ifp); | |
3330 | goto out; | |
3331 | } else if (action == DAD_ABORT) { | |
3332 | addrconf_dad_stop(ifp, 1); | |
3333 | goto out; | |
3334 | } | |
3335 | ||
b7b1bfce | 3336 | if (!ifp->dad_probes && addrconf_dad_end(ifp)) |
f2344a13 HX |
3337 | goto out; |
3338 | ||
c15b1cca | 3339 | write_lock_bh(&idev->lock); |
122e4519 | 3340 | if (idev->dead || !(idev->if_flags & IF_READY)) { |
c15b1cca | 3341 | write_unlock_bh(&idev->lock); |
1da177e4 LT |
3342 | goto out; |
3343 | } | |
21809faf | 3344 | |
3345 | spin_lock(&ifp->lock); | |
622ccdf1 HX |
3346 | if (ifp->state == INET6_IFADDR_STATE_DEAD) { |
3347 | spin_unlock(&ifp->lock); | |
c15b1cca | 3348 | write_unlock_bh(&idev->lock); |
622ccdf1 HX |
3349 | goto out; |
3350 | } | |
3351 | ||
b7b1bfce | 3352 | if (ifp->dad_probes == 0) { |
1da177e4 LT |
3353 | /* |
3354 | * DAD was successful | |
3355 | */ | |
3356 | ||
cc411d0b | 3357 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
21809faf | 3358 | spin_unlock(&ifp->lock); |
c15b1cca | 3359 | write_unlock_bh(&idev->lock); |
1da177e4 LT |
3360 | |
3361 | addrconf_dad_completed(ifp); | |
3362 | ||
3363 | goto out; | |
3364 | } | |
3365 | ||
b7b1bfce | 3366 | ifp->dad_probes--; |
c15b1cca HFS |
3367 | addrconf_mod_dad_work(ifp, |
3368 | NEIGH_VAR(ifp->idev->nd_parms, RETRANS_TIME)); | |
21809faf | 3369 | spin_unlock(&ifp->lock); |
c15b1cca | 3370 | write_unlock_bh(&idev->lock); |
1da177e4 LT |
3371 | |
3372 | /* send a neighbour solicitation for our addr */ | |
1da177e4 | 3373 | addrconf_addr_solict_mult(&ifp->addr, &mcaddr); |
d7aabf22 | 3374 | ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any); |
1da177e4 LT |
3375 | out: |
3376 | in6_ifa_put(ifp); | |
c15b1cca | 3377 | rtnl_unlock(); |
1da177e4 LT |
3378 | } |
3379 | ||
11ffff75 HFS |
3380 | /* ifp->idev must be at least read locked */ |
3381 | static bool ipv6_lonely_lladdr(struct inet6_ifaddr *ifp) | |
3382 | { | |
3383 | struct inet6_ifaddr *ifpiter; | |
3384 | struct inet6_dev *idev = ifp->idev; | |
3385 | ||
602582ca HFS |
3386 | list_for_each_entry_reverse(ifpiter, &idev->addr_list, if_list) { |
3387 | if (ifpiter->scope > IFA_LINK) | |
3388 | break; | |
11ffff75 HFS |
3389 | if (ifp != ifpiter && ifpiter->scope == IFA_LINK && |
3390 | (ifpiter->flags & (IFA_F_PERMANENT|IFA_F_TENTATIVE| | |
3391 | IFA_F_OPTIMISTIC|IFA_F_DADFAILED)) == | |
3392 | IFA_F_PERMANENT) | |
3393 | return false; | |
3394 | } | |
3395 | return true; | |
3396 | } | |
3397 | ||
1da177e4 LT |
3398 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp) |
3399 | { | |
e21e8467 | 3400 | struct net_device *dev = ifp->idev->dev; |
b7b1bfce | 3401 | struct in6_addr lladdr; |
b173ee48 | 3402 | bool send_rs, send_mld; |
b7b1bfce | 3403 | |
c15b1cca | 3404 | addrconf_del_dad_work(ifp); |
1da177e4 LT |
3405 | |
3406 | /* | |
3407 | * Configure the address for reception. Now it is valid. | |
3408 | */ | |
3409 | ||
3410 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
3411 | ||
026359bc TA |
3412 | /* If added prefix is link local and we are prepared to process |
3413 | router advertisements, start sending router solicitations. | |
1da177e4 LT |
3414 | */ |
3415 | ||
1ec047eb | 3416 | read_lock_bh(&ifp->idev->lock); |
11ffff75 | 3417 | send_mld = ifp->scope == IFA_LINK && ipv6_lonely_lladdr(ifp); |
b173ee48 HFS |
3418 | send_rs = send_mld && |
3419 | ipv6_accept_ra(ifp->idev) && | |
1ec047eb | 3420 | ifp->idev->cnf.rtr_solicits > 0 && |
b173ee48 | 3421 | (dev->flags&IFF_LOOPBACK) == 0; |
1ec047eb HFS |
3422 | read_unlock_bh(&ifp->idev->lock); |
3423 | ||
b173ee48 HFS |
3424 | /* While dad is in progress mld report's source address is in6_addrany. |
3425 | * Resend with proper ll now. | |
3426 | */ | |
3427 | if (send_mld) | |
3428 | ipv6_mc_dad_complete(ifp->idev); | |
3429 | ||
1ec047eb | 3430 | if (send_rs) { |
1da177e4 LT |
3431 | /* |
3432 | * If a host as already performed a random delay | |
3433 | * [...] as part of DAD [...] there is no need | |
3434 | * to delay again before sending the first RS | |
3435 | */ | |
1ec047eb | 3436 | if (ipv6_get_lladdr(dev, &lladdr, IFA_F_TENTATIVE)) |
b7b1bfce | 3437 | return; |
1ec047eb | 3438 | ndisc_send_rs(dev, &lladdr, &in6addr_linklocal_allrouters); |
1da177e4 | 3439 | |
b7b1bfce HFS |
3440 | write_lock_bh(&ifp->idev->lock); |
3441 | spin_lock(&ifp->lock); | |
3442 | ifp->idev->rs_probes = 1; | |
1da177e4 | 3443 | ifp->idev->if_flags |= IF_RS_SENT; |
b7b1bfce HFS |
3444 | addrconf_mod_rs_timer(ifp->idev, |
3445 | ifp->idev->cnf.rtr_solicit_interval); | |
3446 | spin_unlock(&ifp->lock); | |
3447 | write_unlock_bh(&ifp->idev->lock); | |
1da177e4 LT |
3448 | } |
3449 | } | |
3450 | ||
e21e8467 SH |
3451 | static void addrconf_dad_run(struct inet6_dev *idev) |
3452 | { | |
c5e33bdd YH |
3453 | struct inet6_ifaddr *ifp; |
3454 | ||
3455 | read_lock_bh(&idev->lock); | |
502a2ffd | 3456 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
21809faf | 3457 | spin_lock(&ifp->lock); |
f2344a13 HX |
3458 | if (ifp->flags & IFA_F_TENTATIVE && |
3459 | ifp->state == INET6_IFADDR_STATE_DAD) | |
3460 | addrconf_dad_kick(ifp); | |
21809faf | 3461 | spin_unlock(&ifp->lock); |
c5e33bdd YH |
3462 | } |
3463 | read_unlock_bh(&idev->lock); | |
3464 | } | |
3465 | ||
1da177e4 LT |
3466 | #ifdef CONFIG_PROC_FS |
3467 | struct if6_iter_state { | |
3c40090a | 3468 | struct seq_net_private p; |
1da177e4 | 3469 | int bucket; |
1d578303 | 3470 | int offset; |
1da177e4 LT |
3471 | }; |
3472 | ||
1d578303 | 3473 | static struct inet6_ifaddr *if6_get_first(struct seq_file *seq, loff_t pos) |
1da177e4 LT |
3474 | { |
3475 | struct inet6_ifaddr *ifa = NULL; | |
3476 | struct if6_iter_state *state = seq->private; | |
1218854a | 3477 | struct net *net = seq_file_net(seq); |
1d578303 | 3478 | int p = 0; |
1da177e4 | 3479 | |
1d578303 MM |
3480 | /* initial bucket if pos is 0 */ |
3481 | if (pos == 0) { | |
3482 | state->bucket = 0; | |
3483 | state->offset = 0; | |
3484 | } | |
3485 | ||
3486 | for (; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { | |
b67bfe0d | 3487 | hlist_for_each_entry_rcu_bh(ifa, &inet6_addr_lst[state->bucket], |
1d578303 | 3488 | addr_lst) { |
9f0d3c27 ED |
3489 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
3490 | continue; | |
1d578303 MM |
3491 | /* sync with offset */ |
3492 | if (p < state->offset) { | |
3493 | p++; | |
3494 | continue; | |
3495 | } | |
3496 | state->offset++; | |
9f0d3c27 | 3497 | return ifa; |
1d578303 MM |
3498 | } |
3499 | ||
3500 | /* prepare for next bucket */ | |
3501 | state->offset = 0; | |
3502 | p = 0; | |
1da177e4 | 3503 | } |
c2e21293 | 3504 | return NULL; |
1da177e4 LT |
3505 | } |
3506 | ||
c2e21293 | 3507 | static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, |
3508 | struct inet6_ifaddr *ifa) | |
1da177e4 LT |
3509 | { |
3510 | struct if6_iter_state *state = seq->private; | |
1218854a | 3511 | struct net *net = seq_file_net(seq); |
1da177e4 | 3512 | |
b67bfe0d | 3513 | hlist_for_each_entry_continue_rcu_bh(ifa, addr_lst) { |
9f0d3c27 ED |
3514 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
3515 | continue; | |
1d578303 | 3516 | state->offset++; |
9f0d3c27 | 3517 | return ifa; |
1d578303 | 3518 | } |
3c40090a | 3519 | |
c2e21293 | 3520 | while (++state->bucket < IN6_ADDR_HSIZE) { |
1d578303 | 3521 | state->offset = 0; |
b67bfe0d | 3522 | hlist_for_each_entry_rcu_bh(ifa, |
c2e21293 | 3523 | &inet6_addr_lst[state->bucket], addr_lst) { |
9f0d3c27 ED |
3524 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
3525 | continue; | |
1d578303 | 3526 | state->offset++; |
9f0d3c27 | 3527 | return ifa; |
c2e21293 | 3528 | } |
1da177e4 | 3529 | } |
3c40090a | 3530 | |
c2e21293 | 3531 | return NULL; |
1da177e4 LT |
3532 | } |
3533 | ||
1da177e4 | 3534 | static void *if6_seq_start(struct seq_file *seq, loff_t *pos) |
4f70ecca | 3535 | __acquires(rcu_bh) |
1da177e4 | 3536 | { |
5c578aed | 3537 | rcu_read_lock_bh(); |
1d578303 | 3538 | return if6_get_first(seq, *pos); |
1da177e4 LT |
3539 | } |
3540 | ||
3541 | static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
3542 | { | |
3543 | struct inet6_ifaddr *ifa; | |
3544 | ||
3545 | ifa = if6_get_next(seq, v); | |
3546 | ++*pos; | |
3547 | return ifa; | |
3548 | } | |
3549 | ||
3550 | static void if6_seq_stop(struct seq_file *seq, void *v) | |
4f70ecca | 3551 | __releases(rcu_bh) |
1da177e4 | 3552 | { |
5c578aed | 3553 | rcu_read_unlock_bh(); |
1da177e4 LT |
3554 | } |
3555 | ||
3556 | static int if6_seq_show(struct seq_file *seq, void *v) | |
3557 | { | |
3558 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; | |
971a351c | 3559 | seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n", |
b071195d | 3560 | &ifp->addr, |
1da177e4 LT |
3561 | ifp->idev->dev->ifindex, |
3562 | ifp->prefix_len, | |
3563 | ifp->scope, | |
971a351c | 3564 | (u8) ifp->flags, |
1da177e4 LT |
3565 | ifp->idev->dev->name); |
3566 | return 0; | |
3567 | } | |
3568 | ||
56b3d975 | 3569 | static const struct seq_operations if6_seq_ops = { |
1da177e4 LT |
3570 | .start = if6_seq_start, |
3571 | .next = if6_seq_next, | |
3572 | .show = if6_seq_show, | |
3573 | .stop = if6_seq_stop, | |
3574 | }; | |
3575 | ||
3576 | static int if6_seq_open(struct inode *inode, struct file *file) | |
3577 | { | |
3c40090a DL |
3578 | return seq_open_net(inode, file, &if6_seq_ops, |
3579 | sizeof(struct if6_iter_state)); | |
1da177e4 LT |
3580 | } |
3581 | ||
9a32144e | 3582 | static const struct file_operations if6_fops = { |
1da177e4 LT |
3583 | .owner = THIS_MODULE, |
3584 | .open = if6_seq_open, | |
3585 | .read = seq_read, | |
3586 | .llseek = seq_lseek, | |
3c40090a | 3587 | .release = seq_release_net, |
1da177e4 LT |
3588 | }; |
3589 | ||
2c8c1e72 | 3590 | static int __net_init if6_proc_net_init(struct net *net) |
1da177e4 | 3591 | { |
d4beaa66 | 3592 | if (!proc_create("if_inet6", S_IRUGO, net->proc_net, &if6_fops)) |
1da177e4 LT |
3593 | return -ENOMEM; |
3594 | return 0; | |
3595 | } | |
3596 | ||
2c8c1e72 | 3597 | static void __net_exit if6_proc_net_exit(struct net *net) |
3c40090a | 3598 | { |
ece31ffd | 3599 | remove_proc_entry("if_inet6", net->proc_net); |
3c40090a DL |
3600 | } |
3601 | ||
3602 | static struct pernet_operations if6_proc_net_ops = { | |
67ba4152 IM |
3603 | .init = if6_proc_net_init, |
3604 | .exit = if6_proc_net_exit, | |
3c40090a DL |
3605 | }; |
3606 | ||
3607 | int __init if6_proc_init(void) | |
3608 | { | |
3609 | return register_pernet_subsys(&if6_proc_net_ops); | |
3610 | } | |
3611 | ||
1da177e4 LT |
3612 | void if6_proc_exit(void) |
3613 | { | |
3c40090a | 3614 | unregister_pernet_subsys(&if6_proc_net_ops); |
1da177e4 LT |
3615 | } |
3616 | #endif /* CONFIG_PROC_FS */ | |
3617 | ||
07a93626 | 3618 | #if IS_ENABLED(CONFIG_IPV6_MIP6) |
3b9f9a1c | 3619 | /* Check if address is a home address configured on any interface. */ |
b71d1d42 | 3620 | int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr) |
3b9f9a1c NT |
3621 | { |
3622 | int ret = 0; | |
c2e21293 | 3623 | struct inet6_ifaddr *ifp = NULL; |
ddbe5032 | 3624 | unsigned int hash = inet6_addr_hash(addr); |
c2e21293 | 3625 | |
5c578aed | 3626 | rcu_read_lock_bh(); |
b67bfe0d | 3627 | hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 3628 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
389f6612 | 3629 | continue; |
caad295f | 3630 | if (ipv6_addr_equal(&ifp->addr, addr) && |
3b9f9a1c NT |
3631 | (ifp->flags & IFA_F_HOMEADDRESS)) { |
3632 | ret = 1; | |
3633 | break; | |
3634 | } | |
3635 | } | |
5c578aed | 3636 | rcu_read_unlock_bh(); |
3b9f9a1c NT |
3637 | return ret; |
3638 | } | |
3639 | #endif | |
3640 | ||
1da177e4 LT |
3641 | /* |
3642 | * Periodic address status verification | |
3643 | */ | |
3644 | ||
c15b1cca | 3645 | static void addrconf_verify_rtnl(void) |
1da177e4 | 3646 | { |
b2db7564 | 3647 | unsigned long now, next, next_sec, next_sched; |
1da177e4 | 3648 | struct inet6_ifaddr *ifp; |
1da177e4 LT |
3649 | int i; |
3650 | ||
c15b1cca HFS |
3651 | ASSERT_RTNL(); |
3652 | ||
5c578aed | 3653 | rcu_read_lock_bh(); |
1da177e4 | 3654 | now = jiffies; |
b2db7564 | 3655 | next = round_jiffies_up(now + ADDR_CHECK_FREQUENCY); |
1da177e4 | 3656 | |
c15b1cca | 3657 | cancel_delayed_work(&addr_chk_work); |
1da177e4 | 3658 | |
bcdd553f | 3659 | for (i = 0; i < IN6_ADDR_HSIZE; i++) { |
1da177e4 | 3660 | restart: |
c15b1cca | 3661 | hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[i], addr_lst) { |
1da177e4 | 3662 | unsigned long age; |
1da177e4 | 3663 | |
fad8da3e YA |
3664 | /* When setting preferred_lft to a value not zero or |
3665 | * infinity, while valid_lft is infinity | |
3666 | * IFA_F_PERMANENT has a non-infinity life time. | |
3667 | */ | |
3668 | if ((ifp->flags & IFA_F_PERMANENT) && | |
3669 | (ifp->prefered_lft == INFINITY_LIFE_TIME)) | |
1da177e4 LT |
3670 | continue; |
3671 | ||
3672 | spin_lock(&ifp->lock); | |
b2db7564 YH |
3673 | /* We try to batch several events at once. */ |
3674 | age = (now - ifp->tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ; | |
1da177e4 | 3675 | |
8f27ebb9 YH |
3676 | if (ifp->valid_lft != INFINITY_LIFE_TIME && |
3677 | age >= ifp->valid_lft) { | |
1da177e4 LT |
3678 | spin_unlock(&ifp->lock); |
3679 | in6_ifa_hold(ifp); | |
1da177e4 LT |
3680 | ipv6_del_addr(ifp); |
3681 | goto restart; | |
8f27ebb9 YH |
3682 | } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { |
3683 | spin_unlock(&ifp->lock); | |
3684 | continue; | |
1da177e4 | 3685 | } else if (age >= ifp->prefered_lft) { |
a1ed0526 | 3686 | /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */ |
1da177e4 LT |
3687 | int deprecate = 0; |
3688 | ||
3689 | if (!(ifp->flags&IFA_F_DEPRECATED)) { | |
3690 | deprecate = 1; | |
3691 | ifp->flags |= IFA_F_DEPRECATED; | |
3692 | } | |
3693 | ||
fad8da3e YA |
3694 | if ((ifp->valid_lft != INFINITY_LIFE_TIME) && |
3695 | (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))) | |
1da177e4 LT |
3696 | next = ifp->tstamp + ifp->valid_lft * HZ; |
3697 | ||
3698 | spin_unlock(&ifp->lock); | |
3699 | ||
3700 | if (deprecate) { | |
3701 | in6_ifa_hold(ifp); | |
1da177e4 LT |
3702 | |
3703 | ipv6_ifa_notify(0, ifp); | |
3704 | in6_ifa_put(ifp); | |
3705 | goto restart; | |
3706 | } | |
1da177e4 LT |
3707 | } else if ((ifp->flags&IFA_F_TEMPORARY) && |
3708 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
88949cf4 | 3709 | unsigned long regen_advance = ifp->idev->cnf.regen_max_retry * |
3710 | ifp->idev->cnf.dad_transmits * | |
1f9248e5 | 3711 | NEIGH_VAR(ifp->idev->nd_parms, RETRANS_TIME) / HZ; |
88949cf4 | 3712 | |
1da177e4 LT |
3713 | if (age >= ifp->prefered_lft - regen_advance) { |
3714 | struct inet6_ifaddr *ifpub = ifp->ifpub; | |
3715 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
3716 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
3717 | if (!ifp->regen_count && ifpub) { | |
3718 | ifp->regen_count++; | |
3719 | in6_ifa_hold(ifp); | |
3720 | in6_ifa_hold(ifpub); | |
3721 | spin_unlock(&ifp->lock); | |
5c578aed | 3722 | |
291d809b HY |
3723 | spin_lock(&ifpub->lock); |
3724 | ifpub->regen_count = 0; | |
3725 | spin_unlock(&ifpub->lock); | |
1da177e4 LT |
3726 | ipv6_create_tempaddr(ifpub, ifp); |
3727 | in6_ifa_put(ifpub); | |
3728 | in6_ifa_put(ifp); | |
3729 | goto restart; | |
3730 | } | |
3731 | } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) | |
3732 | next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; | |
3733 | spin_unlock(&ifp->lock); | |
1da177e4 LT |
3734 | } else { |
3735 | /* ifp->prefered_lft <= ifp->valid_lft */ | |
3736 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
3737 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
3738 | spin_unlock(&ifp->lock); | |
3739 | } | |
3740 | } | |
1da177e4 LT |
3741 | } |
3742 | ||
b2db7564 YH |
3743 | next_sec = round_jiffies_up(next); |
3744 | next_sched = next; | |
3745 | ||
3746 | /* If rounded timeout is accurate enough, accept it. */ | |
3747 | if (time_before(next_sec, next + ADDRCONF_TIMER_FUZZ)) | |
3748 | next_sched = next_sec; | |
3749 | ||
3750 | /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */ | |
3751 | if (time_before(next_sched, jiffies + ADDRCONF_TIMER_FUZZ_MAX)) | |
3752 | next_sched = jiffies + ADDRCONF_TIMER_FUZZ_MAX; | |
3753 | ||
ba3542e1 | 3754 | ADBG(KERN_DEBUG "now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n", |
3755 | now, next, next_sec, next_sched); | |
c15b1cca | 3756 | mod_delayed_work(addrconf_wq, &addr_chk_work, next_sched - now); |
5c578aed | 3757 | rcu_read_unlock_bh(); |
1da177e4 LT |
3758 | } |
3759 | ||
c15b1cca HFS |
3760 | static void addrconf_verify_work(struct work_struct *w) |
3761 | { | |
3762 | rtnl_lock(); | |
3763 | addrconf_verify_rtnl(); | |
3764 | rtnl_unlock(); | |
3765 | } | |
3766 | ||
3767 | static void addrconf_verify(void) | |
3768 | { | |
3769 | mod_delayed_work(addrconf_wq, &addr_chk_work, 0); | |
3770 | } | |
3771 | ||
caeaba79 ND |
3772 | static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local, |
3773 | struct in6_addr **peer_pfx) | |
461d8837 TG |
3774 | { |
3775 | struct in6_addr *pfx = NULL; | |
3776 | ||
caeaba79 ND |
3777 | *peer_pfx = NULL; |
3778 | ||
461d8837 TG |
3779 | if (addr) |
3780 | pfx = nla_data(addr); | |
3781 | ||
3782 | if (local) { | |
3783 | if (pfx && nla_memcmp(local, pfx, sizeof(*pfx))) | |
caeaba79 ND |
3784 | *peer_pfx = pfx; |
3785 | pfx = nla_data(local); | |
461d8837 TG |
3786 | } |
3787 | ||
3788 | return pfx; | |
3789 | } | |
3790 | ||
ef7c79ed | 3791 | static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = { |
461d8837 TG |
3792 | [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, |
3793 | [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, | |
3794 | [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, | |
479840ff | 3795 | [IFA_FLAGS] = { .len = sizeof(u32) }, |
461d8837 TG |
3796 | }; |
3797 | ||
1da177e4 | 3798 | static int |
661d2967 | 3799 | inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 3800 | { |
3b1e0a65 | 3801 | struct net *net = sock_net(skb->sk); |
b933f716 TG |
3802 | struct ifaddrmsg *ifm; |
3803 | struct nlattr *tb[IFA_MAX+1]; | |
caeaba79 | 3804 | struct in6_addr *pfx, *peer_pfx; |
6046d5b4 | 3805 | u32 ifa_flags; |
b933f716 | 3806 | int err; |
1da177e4 | 3807 | |
b933f716 TG |
3808 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3809 | if (err < 0) | |
3810 | return err; | |
3811 | ||
3812 | ifm = nlmsg_data(nlh); | |
caeaba79 | 3813 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer_pfx); |
1da177e4 LT |
3814 | if (pfx == NULL) |
3815 | return -EINVAL; | |
3816 | ||
6046d5b4 HK |
3817 | ifa_flags = tb[IFA_FLAGS] ? nla_get_u32(tb[IFA_FLAGS]) : ifm->ifa_flags; |
3818 | ||
3819 | /* We ignore other flags so far. */ | |
3820 | ifa_flags &= IFA_F_MANAGETEMPADDR; | |
3821 | ||
3822 | return inet6_addr_del(net, ifm->ifa_index, ifa_flags, pfx, | |
3823 | ifm->ifa_prefixlen); | |
1da177e4 LT |
3824 | } |
3825 | ||
479840ff | 3826 | static int inet6_addr_modify(struct inet6_ifaddr *ifp, u32 ifa_flags, |
55ebaef1 | 3827 | u32 prefered_lft, u32 valid_lft) |
081bba5b | 3828 | { |
6f704992 YH |
3829 | u32 flags; |
3830 | clock_t expires; | |
4bed72e4 | 3831 | unsigned long timeout; |
53bd6749 | 3832 | bool was_managetempaddr; |
5b84efec | 3833 | bool had_prefixroute; |
46d48046 | 3834 | |
c15b1cca HFS |
3835 | ASSERT_RTNL(); |
3836 | ||
081bba5b NT |
3837 | if (!valid_lft || (prefered_lft > valid_lft)) |
3838 | return -EINVAL; | |
3839 | ||
53bd6749 JP |
3840 | if (ifa_flags & IFA_F_MANAGETEMPADDR && |
3841 | (ifp->flags & IFA_F_TEMPORARY || ifp->prefix_len != 64)) | |
3842 | return -EINVAL; | |
3843 | ||
4bed72e4 YH |
3844 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
3845 | if (addrconf_finite_timeout(timeout)) { | |
3846 | expires = jiffies_to_clock_t(timeout * HZ); | |
3847 | valid_lft = timeout; | |
6f704992 | 3848 | flags = RTF_EXPIRES; |
4bed72e4 YH |
3849 | } else { |
3850 | expires = 0; | |
3851 | flags = 0; | |
3852 | ifa_flags |= IFA_F_PERMANENT; | |
6f704992 | 3853 | } |
081bba5b | 3854 | |
4bed72e4 YH |
3855 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
3856 | if (addrconf_finite_timeout(timeout)) { | |
3857 | if (timeout == 0) | |
3858 | ifa_flags |= IFA_F_DEPRECATED; | |
3859 | prefered_lft = timeout; | |
3860 | } | |
081bba5b NT |
3861 | |
3862 | spin_lock_bh(&ifp->lock); | |
53bd6749 | 3863 | was_managetempaddr = ifp->flags & IFA_F_MANAGETEMPADDR; |
5b84efec TH |
3864 | had_prefixroute = ifp->flags & IFA_F_PERMANENT && |
3865 | !(ifp->flags & IFA_F_NOPREFIXROUTE); | |
53bd6749 | 3866 | ifp->flags &= ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | |
761aac73 TH |
3867 | IFA_F_HOMEADDRESS | IFA_F_MANAGETEMPADDR | |
3868 | IFA_F_NOPREFIXROUTE); | |
53bd6749 | 3869 | ifp->flags |= ifa_flags; |
081bba5b NT |
3870 | ifp->tstamp = jiffies; |
3871 | ifp->valid_lft = valid_lft; | |
3872 | ifp->prefered_lft = prefered_lft; | |
3873 | ||
3874 | spin_unlock_bh(&ifp->lock); | |
3875 | if (!(ifp->flags&IFA_F_TENTATIVE)) | |
3876 | ipv6_ifa_notify(0, ifp); | |
081bba5b | 3877 | |
761aac73 TH |
3878 | if (!(ifa_flags & IFA_F_NOPREFIXROUTE)) { |
3879 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev, | |
3880 | expires, flags); | |
5b84efec TH |
3881 | } else if (had_prefixroute) { |
3882 | enum cleanup_prefix_rt_t action; | |
3883 | unsigned long rt_expires; | |
3884 | ||
3885 | write_lock_bh(&ifp->idev->lock); | |
3886 | action = check_cleanup_prefix_route(ifp, &rt_expires); | |
3887 | write_unlock_bh(&ifp->idev->lock); | |
3888 | ||
3889 | if (action != CLEANUP_PREFIX_RT_NOP) { | |
3890 | cleanup_prefix_route(ifp, rt_expires, | |
3891 | action == CLEANUP_PREFIX_RT_DEL); | |
3892 | } | |
761aac73 | 3893 | } |
53bd6749 JP |
3894 | |
3895 | if (was_managetempaddr || ifp->flags & IFA_F_MANAGETEMPADDR) { | |
3896 | if (was_managetempaddr && !(ifp->flags & IFA_F_MANAGETEMPADDR)) | |
3897 | valid_lft = prefered_lft = 0; | |
3898 | manage_tempaddrs(ifp->idev, ifp, valid_lft, prefered_lft, | |
3899 | !was_managetempaddr, jiffies); | |
3900 | } | |
3901 | ||
c15b1cca | 3902 | addrconf_verify_rtnl(); |
081bba5b NT |
3903 | |
3904 | return 0; | |
3905 | } | |
3906 | ||
1da177e4 | 3907 | static int |
661d2967 | 3908 | inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 3909 | { |
3b1e0a65 | 3910 | struct net *net = sock_net(skb->sk); |
461d8837 TG |
3911 | struct ifaddrmsg *ifm; |
3912 | struct nlattr *tb[IFA_MAX+1]; | |
caeaba79 | 3913 | struct in6_addr *pfx, *peer_pfx; |
7198f8ce TG |
3914 | struct inet6_ifaddr *ifa; |
3915 | struct net_device *dev; | |
55ebaef1 | 3916 | u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; |
479840ff | 3917 | u32 ifa_flags; |
461d8837 | 3918 | int err; |
1da177e4 | 3919 | |
461d8837 TG |
3920 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3921 | if (err < 0) | |
3922 | return err; | |
3923 | ||
3924 | ifm = nlmsg_data(nlh); | |
caeaba79 | 3925 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer_pfx); |
1da177e4 LT |
3926 | if (pfx == NULL) |
3927 | return -EINVAL; | |
3928 | ||
461d8837 | 3929 | if (tb[IFA_CACHEINFO]) { |
0778769d | 3930 | struct ifa_cacheinfo *ci; |
461d8837 TG |
3931 | |
3932 | ci = nla_data(tb[IFA_CACHEINFO]); | |
0778769d | 3933 | valid_lft = ci->ifa_valid; |
461d8837 TG |
3934 | preferred_lft = ci->ifa_prefered; |
3935 | } else { | |
3936 | preferred_lft = INFINITY_LIFE_TIME; | |
3937 | valid_lft = INFINITY_LIFE_TIME; | |
0778769d NT |
3938 | } |
3939 | ||
af284937 | 3940 | dev = __dev_get_by_index(net, ifm->ifa_index); |
7198f8ce TG |
3941 | if (dev == NULL) |
3942 | return -ENODEV; | |
3943 | ||
479840ff JP |
3944 | ifa_flags = tb[IFA_FLAGS] ? nla_get_u32(tb[IFA_FLAGS]) : ifm->ifa_flags; |
3945 | ||
55ebaef1 | 3946 | /* We ignore other flags so far. */ |
761aac73 TH |
3947 | ifa_flags &= IFA_F_NODAD | IFA_F_HOMEADDRESS | IFA_F_MANAGETEMPADDR | |
3948 | IFA_F_NOPREFIXROUTE; | |
55ebaef1 | 3949 | |
1cab3da6 | 3950 | ifa = ipv6_get_ifaddr(net, pfx, dev, 1); |
7198f8ce TG |
3951 | if (ifa == NULL) { |
3952 | /* | |
3953 | * It would be best to check for !NLM_F_CREATE here but | |
db9c7c39 | 3954 | * userspace already relies on not having to provide this. |
7198f8ce | 3955 | */ |
caeaba79 | 3956 | return inet6_addr_add(net, ifm->ifa_index, pfx, peer_pfx, |
af284937 DL |
3957 | ifm->ifa_prefixlen, ifa_flags, |
3958 | preferred_lft, valid_lft); | |
081bba5b NT |
3959 | } |
3960 | ||
7198f8ce TG |
3961 | if (nlh->nlmsg_flags & NLM_F_EXCL || |
3962 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) | |
3963 | err = -EEXIST; | |
3964 | else | |
55ebaef1 | 3965 | err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft); |
7198f8ce TG |
3966 | |
3967 | in6_ifa_put(ifa); | |
3968 | ||
3969 | return err; | |
1da177e4 LT |
3970 | } |
3971 | ||
479840ff | 3972 | static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u32 flags, |
101bb229 TG |
3973 | u8 scope, int ifindex) |
3974 | { | |
3975 | struct ifaddrmsg *ifm; | |
3976 | ||
3977 | ifm = nlmsg_data(nlh); | |
3978 | ifm->ifa_family = AF_INET6; | |
3979 | ifm->ifa_prefixlen = prefixlen; | |
3980 | ifm->ifa_flags = flags; | |
3981 | ifm->ifa_scope = scope; | |
3982 | ifm->ifa_index = ifindex; | |
3983 | } | |
3984 | ||
85486af0 TG |
3985 | static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, |
3986 | unsigned long tstamp, u32 preferred, u32 valid) | |
3987 | { | |
3988 | struct ifa_cacheinfo ci; | |
3989 | ||
18a31e1e TG |
3990 | ci.cstamp = cstamp_delta(cstamp); |
3991 | ci.tstamp = cstamp_delta(tstamp); | |
85486af0 TG |
3992 | ci.ifa_prefered = preferred; |
3993 | ci.ifa_valid = valid; | |
3994 | ||
3995 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
3996 | } | |
3997 | ||
101bb229 TG |
3998 | static inline int rt_scope(int ifa_scope) |
3999 | { | |
4000 | if (ifa_scope & IFA_HOST) | |
4001 | return RT_SCOPE_HOST; | |
4002 | else if (ifa_scope & IFA_LINK) | |
4003 | return RT_SCOPE_LINK; | |
4004 | else if (ifa_scope & IFA_SITE) | |
4005 | return RT_SCOPE_SITE; | |
4006 | else | |
4007 | return RT_SCOPE_UNIVERSE; | |
4008 | } | |
4009 | ||
0ab6803b TG |
4010 | static inline int inet6_ifaddr_msgsize(void) |
4011 | { | |
339bf98f | 4012 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
caeaba79 | 4013 | + nla_total_size(16) /* IFA_LOCAL */ |
339bf98f | 4014 | + nla_total_size(16) /* IFA_ADDRESS */ |
479840ff JP |
4015 | + nla_total_size(sizeof(struct ifa_cacheinfo)) |
4016 | + nla_total_size(4) /* IFA_FLAGS */; | |
0ab6803b | 4017 | } |
c5396a31 | 4018 | |
1da177e4 | 4019 | static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, |
15e47304 | 4020 | u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4 | 4021 | { |
1da177e4 | 4022 | struct nlmsghdr *nlh; |
85486af0 | 4023 | u32 preferred, valid; |
1da177e4 | 4024 | |
15e47304 | 4025 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
0ab6803b | 4026 | if (nlh == NULL) |
26932566 | 4027 | return -EMSGSIZE; |
0ab6803b | 4028 | |
101bb229 TG |
4029 | put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), |
4030 | ifa->idev->dev->ifindex); | |
4031 | ||
fad8da3e YA |
4032 | if (!((ifa->flags&IFA_F_PERMANENT) && |
4033 | (ifa->prefered_lft == INFINITY_LIFE_TIME))) { | |
85486af0 TG |
4034 | preferred = ifa->prefered_lft; |
4035 | valid = ifa->valid_lft; | |
4036 | if (preferred != INFINITY_LIFE_TIME) { | |
1da177e4 | 4037 | long tval = (jiffies - ifa->tstamp)/HZ; |
a1faa698 JR |
4038 | if (preferred > tval) |
4039 | preferred -= tval; | |
4040 | else | |
4041 | preferred = 0; | |
f56619fc BH |
4042 | if (valid != INFINITY_LIFE_TIME) { |
4043 | if (valid > tval) | |
4044 | valid -= tval; | |
4045 | else | |
4046 | valid = 0; | |
4047 | } | |
1da177e4 LT |
4048 | } |
4049 | } else { | |
85486af0 TG |
4050 | preferred = INFINITY_LIFE_TIME; |
4051 | valid = INFINITY_LIFE_TIME; | |
4052 | } | |
4053 | ||
7996c799 | 4054 | if (!ipv6_addr_any(&ifa->peer_addr)) { |
caeaba79 ND |
4055 | if (nla_put(skb, IFA_LOCAL, 16, &ifa->addr) < 0 || |
4056 | nla_put(skb, IFA_ADDRESS, 16, &ifa->peer_addr) < 0) | |
4057 | goto error; | |
4058 | } else | |
4059 | if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0) | |
4060 | goto error; | |
4061 | ||
4062 | if (put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) | |
4063 | goto error; | |
1da177e4 | 4064 | |
479840ff JP |
4065 | if (nla_put_u32(skb, IFA_FLAGS, ifa->flags) < 0) |
4066 | goto error; | |
4067 | ||
053c095a JB |
4068 | nlmsg_end(skb, nlh); |
4069 | return 0; | |
caeaba79 ND |
4070 | |
4071 | error: | |
4072 | nlmsg_cancel(skb, nlh); | |
4073 | return -EMSGSIZE; | |
1da177e4 LT |
4074 | } |
4075 | ||
4076 | static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, | |
15e47304 | 4077 | u32 portid, u32 seq, int event, u16 flags) |
1da177e4 | 4078 | { |
1da177e4 | 4079 | struct nlmsghdr *nlh; |
101bb229 TG |
4080 | u8 scope = RT_SCOPE_UNIVERSE; |
4081 | int ifindex = ifmca->idev->dev->ifindex; | |
4082 | ||
4083 | if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE) | |
4084 | scope = RT_SCOPE_SITE; | |
1da177e4 | 4085 | |
15e47304 | 4086 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
0ab6803b | 4087 | if (nlh == NULL) |
26932566 | 4088 | return -EMSGSIZE; |
85486af0 | 4089 | |
0ab6803b TG |
4090 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
4091 | if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 || | |
4092 | put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp, | |
26932566 PM |
4093 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
4094 | nlmsg_cancel(skb, nlh); | |
4095 | return -EMSGSIZE; | |
4096 | } | |
85486af0 | 4097 | |
053c095a JB |
4098 | nlmsg_end(skb, nlh); |
4099 | return 0; | |
1da177e4 LT |
4100 | } |
4101 | ||
4102 | static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, | |
15e47304 | 4103 | u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4 | 4104 | { |
1da177e4 | 4105 | struct nlmsghdr *nlh; |
101bb229 TG |
4106 | u8 scope = RT_SCOPE_UNIVERSE; |
4107 | int ifindex = ifaca->aca_idev->dev->ifindex; | |
4108 | ||
4109 | if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) | |
4110 | scope = RT_SCOPE_SITE; | |
1da177e4 | 4111 | |
15e47304 | 4112 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
0ab6803b | 4113 | if (nlh == NULL) |
26932566 | 4114 | return -EMSGSIZE; |
85486af0 | 4115 | |
0ab6803b TG |
4116 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
4117 | if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 || | |
4118 | put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp, | |
26932566 PM |
4119 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
4120 | nlmsg_cancel(skb, nlh); | |
4121 | return -EMSGSIZE; | |
4122 | } | |
1da177e4 | 4123 | |
053c095a JB |
4124 | nlmsg_end(skb, nlh); |
4125 | return 0; | |
1da177e4 LT |
4126 | } |
4127 | ||
e21e8467 | 4128 | enum addr_type_t { |
1da177e4 LT |
4129 | UNICAST_ADDR, |
4130 | MULTICAST_ADDR, | |
4131 | ANYCAST_ADDR, | |
4132 | }; | |
4133 | ||
234b27c3 ED |
4134 | /* called with rcu_read_lock() */ |
4135 | static int in6_dump_addrs(struct inet6_dev *idev, struct sk_buff *skb, | |
4136 | struct netlink_callback *cb, enum addr_type_t type, | |
4137 | int s_ip_idx, int *p_ip_idx) | |
4138 | { | |
234b27c3 ED |
4139 | struct ifmcaddr6 *ifmca; |
4140 | struct ifacaddr6 *ifaca; | |
4141 | int err = 1; | |
4142 | int ip_idx = *p_ip_idx; | |
4143 | ||
4144 | read_lock_bh(&idev->lock); | |
4145 | switch (type) { | |
502a2ffd | 4146 | case UNICAST_ADDR: { |
4147 | struct inet6_ifaddr *ifa; | |
4148 | ||
234b27c3 | 4149 | /* unicast address incl. temp addr */ |
502a2ffd | 4150 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
4151 | if (++ip_idx < s_ip_idx) | |
234b27c3 ED |
4152 | continue; |
4153 | err = inet6_fill_ifaddr(skb, ifa, | |
15e47304 | 4154 | NETLINK_CB(cb->skb).portid, |
234b27c3 ED |
4155 | cb->nlh->nlmsg_seq, |
4156 | RTM_NEWADDR, | |
4157 | NLM_F_MULTI); | |
053c095a | 4158 | if (err < 0) |
234b27c3 | 4159 | break; |
63998ac2 | 4160 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
234b27c3 ED |
4161 | } |
4162 | break; | |
502a2ffd | 4163 | } |
234b27c3 ED |
4164 | case MULTICAST_ADDR: |
4165 | /* multicast address */ | |
4166 | for (ifmca = idev->mc_list; ifmca; | |
4167 | ifmca = ifmca->next, ip_idx++) { | |
4168 | if (ip_idx < s_ip_idx) | |
4169 | continue; | |
4170 | err = inet6_fill_ifmcaddr(skb, ifmca, | |
15e47304 | 4171 | NETLINK_CB(cb->skb).portid, |
234b27c3 ED |
4172 | cb->nlh->nlmsg_seq, |
4173 | RTM_GETMULTICAST, | |
4174 | NLM_F_MULTI); | |
053c095a | 4175 | if (err < 0) |
234b27c3 ED |
4176 | break; |
4177 | } | |
4178 | break; | |
4179 | case ANYCAST_ADDR: | |
4180 | /* anycast address */ | |
4181 | for (ifaca = idev->ac_list; ifaca; | |
4182 | ifaca = ifaca->aca_next, ip_idx++) { | |
4183 | if (ip_idx < s_ip_idx) | |
4184 | continue; | |
4185 | err = inet6_fill_ifacaddr(skb, ifaca, | |
15e47304 | 4186 | NETLINK_CB(cb->skb).portid, |
234b27c3 ED |
4187 | cb->nlh->nlmsg_seq, |
4188 | RTM_GETANYCAST, | |
4189 | NLM_F_MULTI); | |
053c095a | 4190 | if (err < 0) |
234b27c3 ED |
4191 | break; |
4192 | } | |
4193 | break; | |
4194 | default: | |
4195 | break; | |
4196 | } | |
4197 | read_unlock_bh(&idev->lock); | |
4198 | *p_ip_idx = ip_idx; | |
4199 | return err; | |
4200 | } | |
4201 | ||
1da177e4 LT |
4202 | static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, |
4203 | enum addr_type_t type) | |
4204 | { | |
234b27c3 ED |
4205 | struct net *net = sock_net(skb->sk); |
4206 | int h, s_h; | |
1da177e4 LT |
4207 | int idx, ip_idx; |
4208 | int s_idx, s_ip_idx; | |
1da177e4 | 4209 | struct net_device *dev; |
234b27c3 ED |
4210 | struct inet6_dev *idev; |
4211 | struct hlist_head *head; | |
1ab1457c | 4212 | |
234b27c3 ED |
4213 | s_h = cb->args[0]; |
4214 | s_idx = idx = cb->args[1]; | |
4215 | s_ip_idx = ip_idx = cb->args[2]; | |
5d5619b4 | 4216 | |
234b27c3 | 4217 | rcu_read_lock(); |
63998ac2 | 4218 | cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^ net->dev_base_seq; |
234b27c3 ED |
4219 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { |
4220 | idx = 0; | |
4221 | head = &net->dev_index_head[h]; | |
b67bfe0d | 4222 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
234b27c3 ED |
4223 | if (idx < s_idx) |
4224 | goto cont; | |
4b97efdf | 4225 | if (h > s_h || idx > s_idx) |
234b27c3 ED |
4226 | s_ip_idx = 0; |
4227 | ip_idx = 0; | |
e21e8467 SH |
4228 | idev = __in6_dev_get(dev); |
4229 | if (!idev) | |
234b27c3 ED |
4230 | goto cont; |
4231 | ||
4232 | if (in6_dump_addrs(idev, skb, cb, type, | |
7b46a644 | 4233 | s_ip_idx, &ip_idx) < 0) |
234b27c3 | 4234 | goto done; |
7562f876 | 4235 | cont: |
234b27c3 ED |
4236 | idx++; |
4237 | } | |
1da177e4 | 4238 | } |
234b27c3 ED |
4239 | done: |
4240 | rcu_read_unlock(); | |
4241 | cb->args[0] = h; | |
4242 | cb->args[1] = idx; | |
4243 | cb->args[2] = ip_idx; | |
4244 | ||
1da177e4 LT |
4245 | return skb->len; |
4246 | } | |
4247 | ||
4248 | static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
4249 | { | |
4250 | enum addr_type_t type = UNICAST_ADDR; | |
b854272b | 4251 | |
1da177e4 LT |
4252 | return inet6_dump_addr(skb, cb, type); |
4253 | } | |
4254 | ||
4255 | static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
4256 | { | |
4257 | enum addr_type_t type = MULTICAST_ADDR; | |
b854272b | 4258 | |
1da177e4 LT |
4259 | return inet6_dump_addr(skb, cb, type); |
4260 | } | |
4261 | ||
4262 | ||
4263 | static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
4264 | { | |
4265 | enum addr_type_t type = ANYCAST_ADDR; | |
b854272b | 4266 | |
1da177e4 LT |
4267 | return inet6_dump_addr(skb, cb, type); |
4268 | } | |
4269 | ||
661d2967 | 4270 | static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr *nlh) |
6c223828 | 4271 | { |
3b1e0a65 | 4272 | struct net *net = sock_net(in_skb->sk); |
1b29fc2c TG |
4273 | struct ifaddrmsg *ifm; |
4274 | struct nlattr *tb[IFA_MAX+1]; | |
caeaba79 | 4275 | struct in6_addr *addr = NULL, *peer; |
6c223828 NT |
4276 | struct net_device *dev = NULL; |
4277 | struct inet6_ifaddr *ifa; | |
4278 | struct sk_buff *skb; | |
6c223828 NT |
4279 | int err; |
4280 | ||
1b29fc2c TG |
4281 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
4282 | if (err < 0) | |
4283 | goto errout; | |
4284 | ||
caeaba79 | 4285 | addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer); |
1b29fc2c TG |
4286 | if (addr == NULL) { |
4287 | err = -EINVAL; | |
4288 | goto errout; | |
6c223828 | 4289 | } |
6c223828 | 4290 | |
1b29fc2c | 4291 | ifm = nlmsg_data(nlh); |
6c223828 | 4292 | if (ifm->ifa_index) |
6fda7350 | 4293 | dev = __dev_get_by_index(net, ifm->ifa_index); |
6c223828 | 4294 | |
e21e8467 SH |
4295 | ifa = ipv6_get_ifaddr(net, addr, dev, 1); |
4296 | if (!ifa) { | |
1b29fc2c TG |
4297 | err = -EADDRNOTAVAIL; |
4298 | goto errout; | |
4299 | } | |
6c223828 | 4300 | |
e21e8467 SH |
4301 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL); |
4302 | if (!skb) { | |
6c223828 | 4303 | err = -ENOBUFS; |
1b29fc2c | 4304 | goto errout_ifa; |
6c223828 NT |
4305 | } |
4306 | ||
15e47304 | 4307 | err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).portid, |
6c223828 | 4308 | nlh->nlmsg_seq, RTM_NEWADDR, 0); |
26932566 PM |
4309 | if (err < 0) { |
4310 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
4311 | WARN_ON(err == -EMSGSIZE); | |
4312 | kfree_skb(skb); | |
4313 | goto errout_ifa; | |
4314 | } | |
15e47304 | 4315 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); |
1b29fc2c | 4316 | errout_ifa: |
6c223828 | 4317 | in6_ifa_put(ifa); |
1b29fc2c | 4318 | errout: |
6c223828 | 4319 | return err; |
6c223828 NT |
4320 | } |
4321 | ||
1da177e4 LT |
4322 | static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) |
4323 | { | |
4324 | struct sk_buff *skb; | |
c346dca1 | 4325 | struct net *net = dev_net(ifa->idev->dev); |
5d620266 | 4326 | int err = -ENOBUFS; |
1da177e4 | 4327 | |
0ab6803b | 4328 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); |
5d620266 TG |
4329 | if (skb == NULL) |
4330 | goto errout; | |
4331 | ||
4332 | err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0); | |
26932566 PM |
4333 | if (err < 0) { |
4334 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
4335 | WARN_ON(err == -EMSGSIZE); | |
4336 | kfree_skb(skb); | |
4337 | goto errout; | |
4338 | } | |
1ce85fe4 PNA |
4339 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
4340 | return; | |
5d620266 TG |
4341 | errout: |
4342 | if (err < 0) | |
6fda7350 | 4343 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); |
1da177e4 LT |
4344 | } |
4345 | ||
b6f99a21 | 4346 | static inline void ipv6_store_devconf(struct ipv6_devconf *cnf, |
1da177e4 LT |
4347 | __s32 *array, int bytes) |
4348 | { | |
04561c1f TG |
4349 | BUG_ON(bytes < (DEVCONF_MAX * 4)); |
4350 | ||
1da177e4 LT |
4351 | memset(array, 0, bytes); |
4352 | array[DEVCONF_FORWARDING] = cnf->forwarding; | |
4353 | array[DEVCONF_HOPLIMIT] = cnf->hop_limit; | |
4354 | array[DEVCONF_MTU6] = cnf->mtu6; | |
4355 | array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; | |
4356 | array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; | |
4357 | array[DEVCONF_AUTOCONF] = cnf->autoconf; | |
4358 | array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; | |
4359 | array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; | |
93908d19 TG |
4360 | array[DEVCONF_RTR_SOLICIT_INTERVAL] = |
4361 | jiffies_to_msecs(cnf->rtr_solicit_interval); | |
4362 | array[DEVCONF_RTR_SOLICIT_DELAY] = | |
4363 | jiffies_to_msecs(cnf->rtr_solicit_delay); | |
1da177e4 | 4364 | array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; |
fc4eba58 HFS |
4365 | array[DEVCONF_MLDV1_UNSOLICITED_REPORT_INTERVAL] = |
4366 | jiffies_to_msecs(cnf->mldv1_unsolicited_report_interval); | |
4367 | array[DEVCONF_MLDV2_UNSOLICITED_REPORT_INTERVAL] = | |
4368 | jiffies_to_msecs(cnf->mldv2_unsolicited_report_interval); | |
1da177e4 LT |
4369 | array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; |
4370 | array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; | |
4371 | array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; | |
4372 | array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; | |
4373 | array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; | |
1da177e4 | 4374 | array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; |
65f5c7c1 | 4375 | array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; |
c4fd30eb | 4376 | array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; |
930d6ff2 YH |
4377 | #ifdef CONFIG_IPV6_ROUTER_PREF |
4378 | array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; | |
93908d19 TG |
4379 | array[DEVCONF_RTR_PROBE_INTERVAL] = |
4380 | jiffies_to_msecs(cnf->rtr_probe_interval); | |
fa03ef38 | 4381 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 YH |
4382 | array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; |
4383 | #endif | |
930d6ff2 | 4384 | #endif |
fbea49e1 | 4385 | array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp; |
0bcbc926 | 4386 | array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route; |
95c385b4 NH |
4387 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
4388 | array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad; | |
7fd2561e | 4389 | array[DEVCONF_USE_OPTIMISTIC] = cnf->use_optimistic; |
95c385b4 | 4390 | #endif |
7bc570c8 YH |
4391 | #ifdef CONFIG_IPV6_MROUTE |
4392 | array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding; | |
4393 | #endif | |
778d80be | 4394 | array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6; |
1b34be74 | 4395 | array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad; |
c3faca05 | 4396 | array[DEVCONF_FORCE_TLLAO] = cnf->force_tllao; |
5cb04436 | 4397 | array[DEVCONF_NDISC_NOTIFY] = cnf->ndisc_notify; |
b800c3b9 | 4398 | array[DEVCONF_SUPPRESS_FRAG_NDISC] = cnf->suppress_frag_ndisc; |
d9333196 | 4399 | array[DEVCONF_ACCEPT_RA_FROM_LOCAL] = cnf->accept_ra_from_local; |
c2943f14 | 4400 | array[DEVCONF_ACCEPT_RA_MTU] = cnf->accept_ra_mtu; |
1da177e4 LT |
4401 | } |
4402 | ||
b382b191 TG |
4403 | static inline size_t inet6_ifla6_size(void) |
4404 | { | |
4405 | return nla_total_size(4) /* IFLA_INET6_FLAGS */ | |
4406 | + nla_total_size(sizeof(struct ifla_cacheinfo)) | |
4407 | + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */ | |
4408 | + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */ | |
f53adae4 DB |
4409 | + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */ |
4410 | + nla_total_size(sizeof(struct in6_addr)); /* IFLA_INET6_TOKEN */ | |
b382b191 TG |
4411 | } |
4412 | ||
339bf98f TG |
4413 | static inline size_t inet6_if_nlmsg_size(void) |
4414 | { | |
4415 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
4416 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
4417 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ | |
4418 | + nla_total_size(4) /* IFLA_MTU */ | |
4419 | + nla_total_size(4) /* IFLA_LINK */ | |
b382b191 | 4420 | + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */ |
339bf98f | 4421 | } |
c5396a31 | 4422 | |
be281e55 | 4423 | static inline void __snmp6_fill_statsdev(u64 *stats, atomic_long_t *mib, |
7d720c3e | 4424 | int items, int bytes) |
7f7d9a6b HX |
4425 | { |
4426 | int i; | |
4427 | int pad = bytes - sizeof(u64) * items; | |
4428 | BUG_ON(pad < 0); | |
4429 | ||
4430 | /* Use put_unaligned() because stats may not be aligned for u64. */ | |
4431 | put_unaligned(items, &stats[0]); | |
4432 | for (i = 1; i < items; i++) | |
be281e55 | 4433 | put_unaligned(atomic_long_read(&mib[i]), &stats[i]); |
7f7d9a6b HX |
4434 | |
4435 | memset(&stats[items], 0, pad); | |
4436 | } | |
4437 | ||
698365fa | 4438 | static inline void __snmp6_fill_stats64(u64 *stats, void __percpu *mib, |
4ce3c183 ED |
4439 | int items, int bytes, size_t syncpoff) |
4440 | { | |
4441 | int i; | |
4442 | int pad = bytes - sizeof(u64) * items; | |
4443 | BUG_ON(pad < 0); | |
4444 | ||
4445 | /* Use put_unaligned() because stats may not be aligned for u64. */ | |
4446 | put_unaligned(items, &stats[0]); | |
4447 | for (i = 1; i < items; i++) | |
4448 | put_unaligned(snmp_fold_field64(mib, i, syncpoff), &stats[i]); | |
4449 | ||
4450 | memset(&stats[items], 0, pad); | |
4451 | } | |
4452 | ||
7f7d9a6b HX |
4453 | static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype, |
4454 | int bytes) | |
4455 | { | |
e21e8467 | 4456 | switch (attrtype) { |
7f7d9a6b | 4457 | case IFLA_INET6_STATS: |
698365fa | 4458 | __snmp6_fill_stats64(stats, idev->stats.ipv6, |
4ce3c183 | 4459 | IPSTATS_MIB_MAX, bytes, offsetof(struct ipstats_mib, syncp)); |
7f7d9a6b HX |
4460 | break; |
4461 | case IFLA_INET6_ICMP6STATS: | |
be281e55 | 4462 | __snmp6_fill_statsdev(stats, idev->stats.icmpv6dev->mibs, ICMP6_MIB_MAX, bytes); |
7f7d9a6b HX |
4463 | break; |
4464 | } | |
4465 | } | |
4466 | ||
b382b191 TG |
4467 | static int inet6_fill_ifla6_attrs(struct sk_buff *skb, struct inet6_dev *idev) |
4468 | { | |
4469 | struct nlattr *nla; | |
4470 | struct ifla_cacheinfo ci; | |
4471 | ||
c78679e8 DM |
4472 | if (nla_put_u32(skb, IFLA_INET6_FLAGS, idev->if_flags)) |
4473 | goto nla_put_failure; | |
b382b191 | 4474 | ci.max_reasm_len = IPV6_MAXPLEN; |
24912420 DM |
4475 | ci.tstamp = cstamp_delta(idev->tstamp); |
4476 | ci.reachable_time = jiffies_to_msecs(idev->nd_parms->reachable_time); | |
1f9248e5 | 4477 | ci.retrans_time = jiffies_to_msecs(NEIGH_VAR(idev->nd_parms, RETRANS_TIME)); |
c78679e8 DM |
4478 | if (nla_put(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci)) |
4479 | goto nla_put_failure; | |
b382b191 TG |
4480 | nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32)); |
4481 | if (nla == NULL) | |
4482 | goto nla_put_failure; | |
4483 | ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla)); | |
4484 | ||
4485 | /* XXX - MC not implemented */ | |
4486 | ||
4487 | nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64)); | |
4488 | if (nla == NULL) | |
4489 | goto nla_put_failure; | |
4490 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla)); | |
4491 | ||
4492 | nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64)); | |
4493 | if (nla == NULL) | |
4494 | goto nla_put_failure; | |
4495 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla)); | |
4496 | ||
f53adae4 DB |
4497 | nla = nla_reserve(skb, IFLA_INET6_TOKEN, sizeof(struct in6_addr)); |
4498 | if (nla == NULL) | |
4499 | goto nla_put_failure; | |
bc91b0f0 JP |
4500 | |
4501 | if (nla_put_u8(skb, IFLA_INET6_ADDR_GEN_MODE, idev->addr_gen_mode)) | |
4502 | goto nla_put_failure; | |
4503 | ||
f53adae4 DB |
4504 | read_lock_bh(&idev->lock); |
4505 | memcpy(nla_data(nla), idev->token.s6_addr, nla_len(nla)); | |
4506 | read_unlock_bh(&idev->lock); | |
4507 | ||
b382b191 TG |
4508 | return 0; |
4509 | ||
4510 | nla_put_failure: | |
4511 | return -EMSGSIZE; | |
4512 | } | |
4513 | ||
4514 | static size_t inet6_get_link_af_size(const struct net_device *dev) | |
4515 | { | |
4516 | if (!__in6_dev_get(dev)) | |
4517 | return 0; | |
4518 | ||
4519 | return inet6_ifla6_size(); | |
4520 | } | |
4521 | ||
4522 | static int inet6_fill_link_af(struct sk_buff *skb, const struct net_device *dev) | |
4523 | { | |
4524 | struct inet6_dev *idev = __in6_dev_get(dev); | |
4525 | ||
4526 | if (!idev) | |
4527 | return -ENODATA; | |
4528 | ||
4529 | if (inet6_fill_ifla6_attrs(skb, idev) < 0) | |
4530 | return -EMSGSIZE; | |
4531 | ||
4532 | return 0; | |
4533 | } | |
4534 | ||
f53adae4 DB |
4535 | static int inet6_set_iftoken(struct inet6_dev *idev, struct in6_addr *token) |
4536 | { | |
f53adae4 DB |
4537 | struct inet6_ifaddr *ifp; |
4538 | struct net_device *dev = idev->dev; | |
fc403832 | 4539 | bool update_rs = false; |
dc848292 | 4540 | struct in6_addr ll_addr; |
f53adae4 | 4541 | |
c15b1cca HFS |
4542 | ASSERT_RTNL(); |
4543 | ||
f53adae4 DB |
4544 | if (token == NULL) |
4545 | return -EINVAL; | |
4546 | if (ipv6_addr_any(token)) | |
4547 | return -EINVAL; | |
4548 | if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) | |
4549 | return -EINVAL; | |
f53adae4 DB |
4550 | if (!ipv6_accept_ra(idev)) |
4551 | return -EINVAL; | |
4552 | if (idev->cnf.rtr_solicits <= 0) | |
4553 | return -EINVAL; | |
4554 | ||
4555 | write_lock_bh(&idev->lock); | |
4556 | ||
4557 | BUILD_BUG_ON(sizeof(token->s6_addr) != 16); | |
4558 | memcpy(idev->token.s6_addr + 8, token->s6_addr + 8, 8); | |
4559 | ||
4560 | write_unlock_bh(&idev->lock); | |
4561 | ||
dc848292 HFS |
4562 | if (!idev->dead && (idev->if_flags & IF_READY) && |
4563 | !ipv6_get_lladdr(dev, &ll_addr, IFA_F_TENTATIVE | | |
4564 | IFA_F_OPTIMISTIC)) { | |
fc403832 DB |
4565 | |
4566 | /* If we're not ready, then normal ifup will take care | |
4567 | * of this. Otherwise, we need to request our rs here. | |
4568 | */ | |
4569 | ndisc_send_rs(dev, &ll_addr, &in6addr_linklocal_allrouters); | |
4570 | update_rs = true; | |
4571 | } | |
f53adae4 DB |
4572 | |
4573 | write_lock_bh(&idev->lock); | |
fc403832 | 4574 | |
77ecaace | 4575 | if (update_rs) { |
fc403832 | 4576 | idev->if_flags |= IF_RS_SENT; |
77ecaace HFS |
4577 | idev->rs_probes = 1; |
4578 | addrconf_mod_rs_timer(idev, idev->cnf.rtr_solicit_interval); | |
4579 | } | |
f53adae4 DB |
4580 | |
4581 | /* Well, that's kinda nasty ... */ | |
4582 | list_for_each_entry(ifp, &idev->addr_list, if_list) { | |
4583 | spin_lock(&ifp->lock); | |
617fe29d | 4584 | if (ifp->tokenized) { |
f53adae4 DB |
4585 | ifp->valid_lft = 0; |
4586 | ifp->prefered_lft = 0; | |
4587 | } | |
4588 | spin_unlock(&ifp->lock); | |
4589 | } | |
4590 | ||
4591 | write_unlock_bh(&idev->lock); | |
b2ed64a9 | 4592 | inet6_ifinfo_notify(RTM_NEWLINK, idev); |
c15b1cca | 4593 | addrconf_verify_rtnl(); |
f53adae4 DB |
4594 | return 0; |
4595 | } | |
4596 | ||
11b1f828 DB |
4597 | static const struct nla_policy inet6_af_policy[IFLA_INET6_MAX + 1] = { |
4598 | [IFLA_INET6_ADDR_GEN_MODE] = { .type = NLA_U8 }, | |
4599 | [IFLA_INET6_TOKEN] = { .len = sizeof(struct in6_addr) }, | |
4600 | }; | |
4601 | ||
4602 | static int inet6_validate_link_af(const struct net_device *dev, | |
4603 | const struct nlattr *nla) | |
4604 | { | |
4605 | struct nlattr *tb[IFLA_INET6_MAX + 1]; | |
4606 | ||
4607 | if (dev && !__in6_dev_get(dev)) | |
4608 | return -EAFNOSUPPORT; | |
4609 | ||
4610 | return nla_parse_nested(tb, IFLA_INET6_MAX, nla, inet6_af_policy); | |
4611 | } | |
4612 | ||
f53adae4 DB |
4613 | static int inet6_set_link_af(struct net_device *dev, const struct nlattr *nla) |
4614 | { | |
4615 | int err = -EINVAL; | |
4616 | struct inet6_dev *idev = __in6_dev_get(dev); | |
4617 | struct nlattr *tb[IFLA_INET6_MAX + 1]; | |
4618 | ||
4619 | if (!idev) | |
4620 | return -EAFNOSUPPORT; | |
4621 | ||
4622 | if (nla_parse_nested(tb, IFLA_INET6_MAX, nla, NULL) < 0) | |
4623 | BUG(); | |
4624 | ||
bc91b0f0 | 4625 | if (tb[IFLA_INET6_TOKEN]) { |
f53adae4 | 4626 | err = inet6_set_iftoken(idev, nla_data(tb[IFLA_INET6_TOKEN])); |
bc91b0f0 JP |
4627 | if (err) |
4628 | return err; | |
4629 | } | |
4630 | ||
4631 | if (tb[IFLA_INET6_ADDR_GEN_MODE]) { | |
4632 | u8 mode = nla_get_u8(tb[IFLA_INET6_ADDR_GEN_MODE]); | |
4633 | ||
4634 | if (mode != IN6_ADDR_GEN_MODE_EUI64 && | |
4635 | mode != IN6_ADDR_GEN_MODE_NONE) | |
4636 | return -EINVAL; | |
4637 | idev->addr_gen_mode = mode; | |
4638 | err = 0; | |
4639 | } | |
f53adae4 DB |
4640 | |
4641 | return err; | |
4642 | } | |
4643 | ||
1ab1457c | 4644 | static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, |
15e47304 | 4645 | u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4 | 4646 | { |
04561c1f | 4647 | struct net_device *dev = idev->dev; |
04561c1f TG |
4648 | struct ifinfomsg *hdr; |
4649 | struct nlmsghdr *nlh; | |
4650 | void *protoinfo; | |
04561c1f | 4651 | |
15e47304 | 4652 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*hdr), flags); |
04561c1f | 4653 | if (nlh == NULL) |
26932566 | 4654 | return -EMSGSIZE; |
04561c1f TG |
4655 | |
4656 | hdr = nlmsg_data(nlh); | |
4657 | hdr->ifi_family = AF_INET6; | |
4658 | hdr->__ifi_pad = 0; | |
4659 | hdr->ifi_type = dev->type; | |
4660 | hdr->ifi_index = dev->ifindex; | |
4661 | hdr->ifi_flags = dev_get_flags(dev); | |
4662 | hdr->ifi_change = 0; | |
4663 | ||
c78679e8 DM |
4664 | if (nla_put_string(skb, IFLA_IFNAME, dev->name) || |
4665 | (dev->addr_len && | |
4666 | nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || | |
4667 | nla_put_u32(skb, IFLA_MTU, dev->mtu) || | |
4668 | (dev->ifindex != dev->iflink && | |
4669 | nla_put_u32(skb, IFLA_LINK, dev->iflink))) | |
4670 | goto nla_put_failure; | |
04561c1f TG |
4671 | protoinfo = nla_nest_start(skb, IFLA_PROTINFO); |
4672 | if (protoinfo == NULL) | |
4673 | goto nla_put_failure; | |
1da177e4 | 4674 | |
b382b191 | 4675 | if (inet6_fill_ifla6_attrs(skb, idev) < 0) |
bf99f1bd | 4676 | goto nla_put_failure; |
1da177e4 | 4677 | |
04561c1f | 4678 | nla_nest_end(skb, protoinfo); |
053c095a JB |
4679 | nlmsg_end(skb, nlh); |
4680 | return 0; | |
1da177e4 | 4681 | |
04561c1f | 4682 | nla_put_failure: |
26932566 PM |
4683 | nlmsg_cancel(skb, nlh); |
4684 | return -EMSGSIZE; | |
1da177e4 LT |
4685 | } |
4686 | ||
4687 | static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) | |
4688 | { | |
3b1e0a65 | 4689 | struct net *net = sock_net(skb->sk); |
84d2697d | 4690 | int h, s_h; |
434a8a58 | 4691 | int idx = 0, s_idx; |
1da177e4 LT |
4692 | struct net_device *dev; |
4693 | struct inet6_dev *idev; | |
84d2697d | 4694 | struct hlist_head *head; |
1da177e4 | 4695 | |
84d2697d ED |
4696 | s_h = cb->args[0]; |
4697 | s_idx = cb->args[1]; | |
4698 | ||
4699 | rcu_read_lock(); | |
4700 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
4701 | idx = 0; | |
4702 | head = &net->dev_index_head[h]; | |
b67bfe0d | 4703 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
84d2697d ED |
4704 | if (idx < s_idx) |
4705 | goto cont; | |
4706 | idev = __in6_dev_get(dev); | |
4707 | if (!idev) | |
4708 | goto cont; | |
4709 | if (inet6_fill_ifinfo(skb, idev, | |
15e47304 | 4710 | NETLINK_CB(cb->skb).portid, |
84d2697d | 4711 | cb->nlh->nlmsg_seq, |
053c095a | 4712 | RTM_NEWLINK, NLM_F_MULTI) < 0) |
84d2697d | 4713 | goto out; |
7562f876 | 4714 | cont: |
84d2697d ED |
4715 | idx++; |
4716 | } | |
1da177e4 | 4717 | } |
84d2697d ED |
4718 | out: |
4719 | rcu_read_unlock(); | |
4720 | cb->args[1] = idx; | |
4721 | cb->args[0] = h; | |
1da177e4 LT |
4722 | |
4723 | return skb->len; | |
4724 | } | |
4725 | ||
4726 | void inet6_ifinfo_notify(int event, struct inet6_dev *idev) | |
4727 | { | |
4728 | struct sk_buff *skb; | |
c346dca1 | 4729 | struct net *net = dev_net(idev->dev); |
8d7a76c9 | 4730 | int err = -ENOBUFS; |
1ab1457c | 4731 | |
339bf98f | 4732 | skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC); |
8d7a76c9 TG |
4733 | if (skb == NULL) |
4734 | goto errout; | |
4735 | ||
4736 | err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); | |
26932566 PM |
4737 | if (err < 0) { |
4738 | /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */ | |
4739 | WARN_ON(err == -EMSGSIZE); | |
4740 | kfree_skb(skb); | |
4741 | goto errout; | |
4742 | } | |
5f75a104 | 4743 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFINFO, NULL, GFP_ATOMIC); |
1ce85fe4 | 4744 | return; |
8d7a76c9 TG |
4745 | errout: |
4746 | if (err < 0) | |
5f75a104 | 4747 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFINFO, err); |
1da177e4 LT |
4748 | } |
4749 | ||
339bf98f TG |
4750 | static inline size_t inet6_prefix_nlmsg_size(void) |
4751 | { | |
4752 | return NLMSG_ALIGN(sizeof(struct prefixmsg)) | |
4753 | + nla_total_size(sizeof(struct in6_addr)) | |
4754 | + nla_total_size(sizeof(struct prefix_cacheinfo)); | |
4755 | } | |
c5396a31 | 4756 | |
1da177e4 | 4757 | static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, |
15e47304 | 4758 | struct prefix_info *pinfo, u32 portid, u32 seq, |
6051e2f4 | 4759 | int event, unsigned int flags) |
1da177e4 | 4760 | { |
6051e2f4 TG |
4761 | struct prefixmsg *pmsg; |
4762 | struct nlmsghdr *nlh; | |
1da177e4 LT |
4763 | struct prefix_cacheinfo ci; |
4764 | ||
15e47304 | 4765 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*pmsg), flags); |
6051e2f4 | 4766 | if (nlh == NULL) |
26932566 | 4767 | return -EMSGSIZE; |
6051e2f4 TG |
4768 | |
4769 | pmsg = nlmsg_data(nlh); | |
1da177e4 | 4770 | pmsg->prefix_family = AF_INET6; |
8a47077a PM |
4771 | pmsg->prefix_pad1 = 0; |
4772 | pmsg->prefix_pad2 = 0; | |
1da177e4 LT |
4773 | pmsg->prefix_ifindex = idev->dev->ifindex; |
4774 | pmsg->prefix_len = pinfo->prefix_len; | |
4775 | pmsg->prefix_type = pinfo->type; | |
8a47077a | 4776 | pmsg->prefix_pad3 = 0; |
1da177e4 LT |
4777 | pmsg->prefix_flags = 0; |
4778 | if (pinfo->onlink) | |
4779 | pmsg->prefix_flags |= IF_PREFIX_ONLINK; | |
4780 | if (pinfo->autoconf) | |
4781 | pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; | |
4782 | ||
c78679e8 DM |
4783 | if (nla_put(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix)) |
4784 | goto nla_put_failure; | |
1da177e4 LT |
4785 | ci.preferred_time = ntohl(pinfo->prefered); |
4786 | ci.valid_time = ntohl(pinfo->valid); | |
c78679e8 DM |
4787 | if (nla_put(skb, PREFIX_CACHEINFO, sizeof(ci), &ci)) |
4788 | goto nla_put_failure; | |
053c095a JB |
4789 | nlmsg_end(skb, nlh); |
4790 | return 0; | |
1da177e4 | 4791 | |
6051e2f4 | 4792 | nla_put_failure: |
26932566 PM |
4793 | nlmsg_cancel(skb, nlh); |
4794 | return -EMSGSIZE; | |
1da177e4 LT |
4795 | } |
4796 | ||
1ab1457c | 4797 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 LT |
4798 | struct prefix_info *pinfo) |
4799 | { | |
4800 | struct sk_buff *skb; | |
c346dca1 | 4801 | struct net *net = dev_net(idev->dev); |
8c384bfa | 4802 | int err = -ENOBUFS; |
1da177e4 | 4803 | |
339bf98f | 4804 | skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC); |
8c384bfa TG |
4805 | if (skb == NULL) |
4806 | goto errout; | |
4807 | ||
4808 | err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); | |
26932566 PM |
4809 | if (err < 0) { |
4810 | /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */ | |
4811 | WARN_ON(err == -EMSGSIZE); | |
4812 | kfree_skb(skb); | |
4813 | goto errout; | |
4814 | } | |
1ce85fe4 PNA |
4815 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); |
4816 | return; | |
8c384bfa TG |
4817 | errout: |
4818 | if (err < 0) | |
6fda7350 | 4819 | rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err); |
1da177e4 LT |
4820 | } |
4821 | ||
1da177e4 LT |
4822 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) |
4823 | { | |
63998ac2 ND |
4824 | struct net *net = dev_net(ifp->idev->dev); |
4825 | ||
c15b1cca HFS |
4826 | if (event) |
4827 | ASSERT_RTNL(); | |
4828 | ||
1da177e4 LT |
4829 | inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); |
4830 | ||
4831 | switch (event) { | |
4832 | case RTM_NEWADDR: | |
95c385b4 NH |
4833 | /* |
4834 | * If the address was optimistic | |
4835 | * we inserted the route at the start of | |
4836 | * our DAD process, so we don't need | |
4837 | * to do it again | |
4838 | */ | |
4839 | if (!(ifp->rt->rt6i_node)) | |
4840 | ip6_ins_rt(ifp->rt); | |
1da177e4 LT |
4841 | if (ifp->idev->cnf.forwarding) |
4842 | addrconf_join_anycast(ifp); | |
7996c799 | 4843 | if (!ipv6_addr_any(&ifp->peer_addr)) |
caeaba79 ND |
4844 | addrconf_prefix_route(&ifp->peer_addr, 128, |
4845 | ifp->idev->dev, 0, 0); | |
1da177e4 LT |
4846 | break; |
4847 | case RTM_DELADDR: | |
4848 | if (ifp->idev->cnf.forwarding) | |
4849 | addrconf_leave_anycast(ifp); | |
4850 | addrconf_leave_solict(ifp->idev, &ifp->addr); | |
7996c799 | 4851 | if (!ipv6_addr_any(&ifp->peer_addr)) { |
caeaba79 | 4852 | struct rt6_info *rt; |
caeaba79 | 4853 | |
e7478dfc ND |
4854 | rt = addrconf_get_prefix_route(&ifp->peer_addr, 128, |
4855 | ifp->idev->dev, 0, 0); | |
f24062b0 ND |
4856 | if (rt && ip6_del_rt(rt)) |
4857 | dst_free(&rt->dst); | |
caeaba79 | 4858 | } |
d8d1f30b | 4859 | dst_hold(&ifp->rt->dst); |
93fa159a | 4860 | |
73a8bd74 | 4861 | if (ip6_del_rt(ifp->rt)) |
d8d1f30b | 4862 | dst_free(&ifp->rt->dst); |
705f1c86 HFS |
4863 | |
4864 | rt_genid_bump_ipv6(net); | |
1da177e4 LT |
4865 | break; |
4866 | } | |
63998ac2 | 4867 | atomic_inc(&net->ipv6.dev_addr_genid); |
1da177e4 LT |
4868 | } |
4869 | ||
4870 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) | |
4871 | { | |
8814c4b5 | 4872 | rcu_read_lock_bh(); |
1da177e4 LT |
4873 | if (likely(ifp->idev->dead == 0)) |
4874 | __ipv6_ifa_notify(event, ifp); | |
8814c4b5 | 4875 | rcu_read_unlock_bh(); |
1da177e4 LT |
4876 | } |
4877 | ||
4878 | #ifdef CONFIG_SYSCTL | |
4879 | ||
4880 | static | |
fe2c6338 | 4881 | int addrconf_sysctl_forward(struct ctl_table *ctl, int write, |
1da177e4 LT |
4882 | void __user *buffer, size_t *lenp, loff_t *ppos) |
4883 | { | |
4884 | int *valp = ctl->data; | |
4885 | int val = *valp; | |
88af182e | 4886 | loff_t pos = *ppos; |
fe2c6338 | 4887 | struct ctl_table lctl; |
1da177e4 LT |
4888 | int ret; |
4889 | ||
013d97e9 FR |
4890 | /* |
4891 | * ctl->data points to idev->cnf.forwarding, we should | |
4892 | * not modify it until we get the rtnl lock. | |
4893 | */ | |
4894 | lctl = *ctl; | |
4895 | lctl.data = &val; | |
4896 | ||
4897 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); | |
1da177e4 | 4898 | |
c8fecf22 | 4899 | if (write) |
b325fddb | 4900 | ret = addrconf_fixup_forwarding(ctl, valp, val); |
88af182e EB |
4901 | if (ret) |
4902 | *ppos = pos; | |
1ab1457c | 4903 | return ret; |
1da177e4 LT |
4904 | } |
4905 | ||
56d417b1 BH |
4906 | static void dev_disable_change(struct inet6_dev *idev) |
4907 | { | |
75538c2b CW |
4908 | struct netdev_notifier_info info; |
4909 | ||
56d417b1 BH |
4910 | if (!idev || !idev->dev) |
4911 | return; | |
4912 | ||
75538c2b | 4913 | netdev_notifier_info_init(&info, idev->dev); |
56d417b1 | 4914 | if (idev->cnf.disable_ipv6) |
75538c2b | 4915 | addrconf_notify(NULL, NETDEV_DOWN, &info); |
56d417b1 | 4916 | else |
75538c2b | 4917 | addrconf_notify(NULL, NETDEV_UP, &info); |
56d417b1 BH |
4918 | } |
4919 | ||
4920 | static void addrconf_disable_change(struct net *net, __s32 newf) | |
4921 | { | |
4922 | struct net_device *dev; | |
4923 | struct inet6_dev *idev; | |
4924 | ||
c6d14c84 ED |
4925 | rcu_read_lock(); |
4926 | for_each_netdev_rcu(net, dev) { | |
56d417b1 BH |
4927 | idev = __in6_dev_get(dev); |
4928 | if (idev) { | |
4929 | int changed = (!idev->cnf.disable_ipv6) ^ (!newf); | |
4930 | idev->cnf.disable_ipv6 = newf; | |
4931 | if (changed) | |
4932 | dev_disable_change(idev); | |
4933 | } | |
56d417b1 | 4934 | } |
c6d14c84 | 4935 | rcu_read_unlock(); |
56d417b1 BH |
4936 | } |
4937 | ||
013d97e9 | 4938 | static int addrconf_disable_ipv6(struct ctl_table *table, int *p, int newf) |
56d417b1 BH |
4939 | { |
4940 | struct net *net; | |
013d97e9 FR |
4941 | int old; |
4942 | ||
4943 | if (!rtnl_trylock()) | |
4944 | return restart_syscall(); | |
56d417b1 BH |
4945 | |
4946 | net = (struct net *)table->extra2; | |
013d97e9 FR |
4947 | old = *p; |
4948 | *p = newf; | |
56d417b1 | 4949 | |
013d97e9 FR |
4950 | if (p == &net->ipv6.devconf_dflt->disable_ipv6) { |
4951 | rtnl_unlock(); | |
56d417b1 | 4952 | return 0; |
88af182e | 4953 | } |
56d417b1 BH |
4954 | |
4955 | if (p == &net->ipv6.devconf_all->disable_ipv6) { | |
56d417b1 BH |
4956 | net->ipv6.devconf_dflt->disable_ipv6 = newf; |
4957 | addrconf_disable_change(net, newf); | |
013d97e9 | 4958 | } else if ((!newf) ^ (!old)) |
56d417b1 BH |
4959 | dev_disable_change((struct inet6_dev *)table->extra1); |
4960 | ||
4961 | rtnl_unlock(); | |
4962 | return 0; | |
4963 | } | |
4964 | ||
4965 | static | |
fe2c6338 | 4966 | int addrconf_sysctl_disable(struct ctl_table *ctl, int write, |
56d417b1 BH |
4967 | void __user *buffer, size_t *lenp, loff_t *ppos) |
4968 | { | |
4969 | int *valp = ctl->data; | |
4970 | int val = *valp; | |
88af182e | 4971 | loff_t pos = *ppos; |
fe2c6338 | 4972 | struct ctl_table lctl; |
56d417b1 BH |
4973 | int ret; |
4974 | ||
013d97e9 FR |
4975 | /* |
4976 | * ctl->data points to idev->cnf.disable_ipv6, we should | |
4977 | * not modify it until we get the rtnl lock. | |
4978 | */ | |
4979 | lctl = *ctl; | |
4980 | lctl.data = &val; | |
4981 | ||
4982 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); | |
56d417b1 BH |
4983 | |
4984 | if (write) | |
4985 | ret = addrconf_disable_ipv6(ctl, valp, val); | |
88af182e EB |
4986 | if (ret) |
4987 | *ppos = pos; | |
56d417b1 BH |
4988 | return ret; |
4989 | } | |
4990 | ||
c92d5491 | 4991 | static |
4992 | int addrconf_sysctl_proxy_ndp(struct ctl_table *ctl, int write, | |
4993 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
4994 | { | |
4995 | int *valp = ctl->data; | |
4996 | int ret; | |
4997 | int old, new; | |
4998 | ||
4999 | old = *valp; | |
5000 | ret = proc_dointvec(ctl, write, buffer, lenp, ppos); | |
5001 | new = *valp; | |
5002 | ||
5003 | if (write && old != new) { | |
5004 | struct net *net = ctl->extra2; | |
5005 | ||
5006 | if (!rtnl_trylock()) | |
5007 | return restart_syscall(); | |
5008 | ||
5009 | if (valp == &net->ipv6.devconf_dflt->proxy_ndp) | |
5010 | inet6_netconf_notify_devconf(net, NETCONFA_PROXY_NEIGH, | |
5011 | NETCONFA_IFINDEX_DEFAULT, | |
5012 | net->ipv6.devconf_dflt); | |
5013 | else if (valp == &net->ipv6.devconf_all->proxy_ndp) | |
5014 | inet6_netconf_notify_devconf(net, NETCONFA_PROXY_NEIGH, | |
5015 | NETCONFA_IFINDEX_ALL, | |
5016 | net->ipv6.devconf_all); | |
5017 | else { | |
5018 | struct inet6_dev *idev = ctl->extra1; | |
5019 | ||
5020 | inet6_netconf_notify_devconf(net, NETCONFA_PROXY_NEIGH, | |
5021 | idev->dev->ifindex, | |
5022 | &idev->cnf); | |
5023 | } | |
5024 | rtnl_unlock(); | |
5025 | } | |
5026 | ||
5027 | return ret; | |
5028 | } | |
5029 | ||
5030 | ||
1da177e4 LT |
5031 | static struct addrconf_sysctl_table |
5032 | { | |
5033 | struct ctl_table_header *sysctl_header; | |
fe2c6338 | 5034 | struct ctl_table addrconf_vars[DEVCONF_MAX+1]; |
ab32ea5d | 5035 | } addrconf_sysctl __read_mostly = { |
1da177e4 LT |
5036 | .sysctl_header = NULL, |
5037 | .addrconf_vars = { | |
1ab1457c | 5038 | { |
e21e8467 SH |
5039 | .procname = "forwarding", |
5040 | .data = &ipv6_devconf.forwarding, | |
5041 | .maxlen = sizeof(int), | |
5042 | .mode = 0644, | |
5043 | .proc_handler = addrconf_sysctl_forward, | |
1da177e4 LT |
5044 | }, |
5045 | { | |
e21e8467 SH |
5046 | .procname = "hop_limit", |
5047 | .data = &ipv6_devconf.hop_limit, | |
5048 | .maxlen = sizeof(int), | |
5049 | .mode = 0644, | |
5050 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5051 | }, |
5052 | { | |
e21e8467 SH |
5053 | .procname = "mtu", |
5054 | .data = &ipv6_devconf.mtu6, | |
5055 | .maxlen = sizeof(int), | |
5056 | .mode = 0644, | |
5057 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5058 | }, |
5059 | { | |
e21e8467 SH |
5060 | .procname = "accept_ra", |
5061 | .data = &ipv6_devconf.accept_ra, | |
5062 | .maxlen = sizeof(int), | |
5063 | .mode = 0644, | |
5064 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5065 | }, |
5066 | { | |
e21e8467 SH |
5067 | .procname = "accept_redirects", |
5068 | .data = &ipv6_devconf.accept_redirects, | |
5069 | .maxlen = sizeof(int), | |
5070 | .mode = 0644, | |
5071 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5072 | }, |
5073 | { | |
e21e8467 SH |
5074 | .procname = "autoconf", |
5075 | .data = &ipv6_devconf.autoconf, | |
5076 | .maxlen = sizeof(int), | |
5077 | .mode = 0644, | |
5078 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5079 | }, |
5080 | { | |
e21e8467 SH |
5081 | .procname = "dad_transmits", |
5082 | .data = &ipv6_devconf.dad_transmits, | |
5083 | .maxlen = sizeof(int), | |
5084 | .mode = 0644, | |
5085 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5086 | }, |
5087 | { | |
e21e8467 SH |
5088 | .procname = "router_solicitations", |
5089 | .data = &ipv6_devconf.rtr_solicits, | |
5090 | .maxlen = sizeof(int), | |
5091 | .mode = 0644, | |
5092 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5093 | }, |
5094 | { | |
e21e8467 SH |
5095 | .procname = "router_solicitation_interval", |
5096 | .data = &ipv6_devconf.rtr_solicit_interval, | |
5097 | .maxlen = sizeof(int), | |
5098 | .mode = 0644, | |
5099 | .proc_handler = proc_dointvec_jiffies, | |
1da177e4 LT |
5100 | }, |
5101 | { | |
e21e8467 SH |
5102 | .procname = "router_solicitation_delay", |
5103 | .data = &ipv6_devconf.rtr_solicit_delay, | |
5104 | .maxlen = sizeof(int), | |
5105 | .mode = 0644, | |
5106 | .proc_handler = proc_dointvec_jiffies, | |
1da177e4 LT |
5107 | }, |
5108 | { | |
e21e8467 SH |
5109 | .procname = "force_mld_version", |
5110 | .data = &ipv6_devconf.force_mld_version, | |
5111 | .maxlen = sizeof(int), | |
5112 | .mode = 0644, | |
5113 | .proc_handler = proc_dointvec, | |
1da177e4 | 5114 | }, |
fc4eba58 HFS |
5115 | { |
5116 | .procname = "mldv1_unsolicited_report_interval", | |
5117 | .data = | |
5118 | &ipv6_devconf.mldv1_unsolicited_report_interval, | |
5119 | .maxlen = sizeof(int), | |
5120 | .mode = 0644, | |
5121 | .proc_handler = proc_dointvec_ms_jiffies, | |
5122 | }, | |
5123 | { | |
5124 | .procname = "mldv2_unsolicited_report_interval", | |
5125 | .data = | |
5126 | &ipv6_devconf.mldv2_unsolicited_report_interval, | |
5127 | .maxlen = sizeof(int), | |
5128 | .mode = 0644, | |
5129 | .proc_handler = proc_dointvec_ms_jiffies, | |
5130 | }, | |
1da177e4 | 5131 | { |
e21e8467 SH |
5132 | .procname = "use_tempaddr", |
5133 | .data = &ipv6_devconf.use_tempaddr, | |
5134 | .maxlen = sizeof(int), | |
5135 | .mode = 0644, | |
5136 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5137 | }, |
5138 | { | |
e21e8467 SH |
5139 | .procname = "temp_valid_lft", |
5140 | .data = &ipv6_devconf.temp_valid_lft, | |
5141 | .maxlen = sizeof(int), | |
5142 | .mode = 0644, | |
5143 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5144 | }, |
5145 | { | |
e21e8467 SH |
5146 | .procname = "temp_prefered_lft", |
5147 | .data = &ipv6_devconf.temp_prefered_lft, | |
5148 | .maxlen = sizeof(int), | |
5149 | .mode = 0644, | |
5150 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5151 | }, |
5152 | { | |
e21e8467 SH |
5153 | .procname = "regen_max_retry", |
5154 | .data = &ipv6_devconf.regen_max_retry, | |
5155 | .maxlen = sizeof(int), | |
5156 | .mode = 0644, | |
5157 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5158 | }, |
5159 | { | |
e21e8467 SH |
5160 | .procname = "max_desync_factor", |
5161 | .data = &ipv6_devconf.max_desync_factor, | |
5162 | .maxlen = sizeof(int), | |
5163 | .mode = 0644, | |
5164 | .proc_handler = proc_dointvec, | |
1da177e4 | 5165 | }, |
1da177e4 | 5166 | { |
e21e8467 SH |
5167 | .procname = "max_addresses", |
5168 | .data = &ipv6_devconf.max_addresses, | |
5169 | .maxlen = sizeof(int), | |
5170 | .mode = 0644, | |
5171 | .proc_handler = proc_dointvec, | |
1da177e4 | 5172 | }, |
65f5c7c1 | 5173 | { |
e21e8467 SH |
5174 | .procname = "accept_ra_defrtr", |
5175 | .data = &ipv6_devconf.accept_ra_defrtr, | |
5176 | .maxlen = sizeof(int), | |
5177 | .mode = 0644, | |
5178 | .proc_handler = proc_dointvec, | |
65f5c7c1 | 5179 | }, |
c4fd30eb | 5180 | { |
e21e8467 SH |
5181 | .procname = "accept_ra_pinfo", |
5182 | .data = &ipv6_devconf.accept_ra_pinfo, | |
5183 | .maxlen = sizeof(int), | |
5184 | .mode = 0644, | |
5185 | .proc_handler = proc_dointvec, | |
c4fd30eb | 5186 | }, |
930d6ff2 YH |
5187 | #ifdef CONFIG_IPV6_ROUTER_PREF |
5188 | { | |
e21e8467 SH |
5189 | .procname = "accept_ra_rtr_pref", |
5190 | .data = &ipv6_devconf.accept_ra_rtr_pref, | |
5191 | .maxlen = sizeof(int), | |
5192 | .mode = 0644, | |
5193 | .proc_handler = proc_dointvec, | |
930d6ff2 | 5194 | }, |
52e16356 | 5195 | { |
e21e8467 SH |
5196 | .procname = "router_probe_interval", |
5197 | .data = &ipv6_devconf.rtr_probe_interval, | |
5198 | .maxlen = sizeof(int), | |
5199 | .mode = 0644, | |
5200 | .proc_handler = proc_dointvec_jiffies, | |
52e16356 | 5201 | }, |
fa03ef38 | 5202 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 | 5203 | { |
e21e8467 SH |
5204 | .procname = "accept_ra_rt_info_max_plen", |
5205 | .data = &ipv6_devconf.accept_ra_rt_info_max_plen, | |
5206 | .maxlen = sizeof(int), | |
5207 | .mode = 0644, | |
5208 | .proc_handler = proc_dointvec, | |
09c884d4 YH |
5209 | }, |
5210 | #endif | |
930d6ff2 | 5211 | #endif |
fbea49e1 | 5212 | { |
e21e8467 SH |
5213 | .procname = "proxy_ndp", |
5214 | .data = &ipv6_devconf.proxy_ndp, | |
5215 | .maxlen = sizeof(int), | |
5216 | .mode = 0644, | |
c92d5491 | 5217 | .proc_handler = addrconf_sysctl_proxy_ndp, |
fbea49e1 | 5218 | }, |
0bcbc926 | 5219 | { |
e21e8467 SH |
5220 | .procname = "accept_source_route", |
5221 | .data = &ipv6_devconf.accept_source_route, | |
5222 | .maxlen = sizeof(int), | |
5223 | .mode = 0644, | |
5224 | .proc_handler = proc_dointvec, | |
0bcbc926 | 5225 | }, |
95c385b4 NH |
5226 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
5227 | { | |
e21e8467 SH |
5228 | .procname = "optimistic_dad", |
5229 | .data = &ipv6_devconf.optimistic_dad, | |
5230 | .maxlen = sizeof(int), | |
5231 | .mode = 0644, | |
5232 | .proc_handler = proc_dointvec, | |
95c385b4 NH |
5233 | |
5234 | }, | |
7fd2561e EK |
5235 | { |
5236 | .procname = "use_optimistic", | |
5237 | .data = &ipv6_devconf.use_optimistic, | |
5238 | .maxlen = sizeof(int), | |
5239 | .mode = 0644, | |
5240 | .proc_handler = proc_dointvec, | |
5241 | ||
5242 | }, | |
7bc570c8 YH |
5243 | #endif |
5244 | #ifdef CONFIG_IPV6_MROUTE | |
5245 | { | |
e21e8467 SH |
5246 | .procname = "mc_forwarding", |
5247 | .data = &ipv6_devconf.mc_forwarding, | |
5248 | .maxlen = sizeof(int), | |
5249 | .mode = 0444, | |
5250 | .proc_handler = proc_dointvec, | |
7bc570c8 | 5251 | }, |
95c385b4 | 5252 | #endif |
778d80be | 5253 | { |
e21e8467 SH |
5254 | .procname = "disable_ipv6", |
5255 | .data = &ipv6_devconf.disable_ipv6, | |
5256 | .maxlen = sizeof(int), | |
5257 | .mode = 0644, | |
5258 | .proc_handler = addrconf_sysctl_disable, | |
778d80be | 5259 | }, |
1b34be74 | 5260 | { |
e21e8467 SH |
5261 | .procname = "accept_dad", |
5262 | .data = &ipv6_devconf.accept_dad, | |
5263 | .maxlen = sizeof(int), | |
5264 | .mode = 0644, | |
5265 | .proc_handler = proc_dointvec, | |
1b34be74 | 5266 | }, |
f7734fdf | 5267 | { |
f7734fdf OP |
5268 | .procname = "force_tllao", |
5269 | .data = &ipv6_devconf.force_tllao, | |
5270 | .maxlen = sizeof(int), | |
5271 | .mode = 0644, | |
5272 | .proc_handler = proc_dointvec | |
5273 | }, | |
5cb04436 HFS |
5274 | { |
5275 | .procname = "ndisc_notify", | |
5276 | .data = &ipv6_devconf.ndisc_notify, | |
5277 | .maxlen = sizeof(int), | |
5278 | .mode = 0644, | |
5279 | .proc_handler = proc_dointvec | |
5280 | }, | |
b800c3b9 HFS |
5281 | { |
5282 | .procname = "suppress_frag_ndisc", | |
5283 | .data = &ipv6_devconf.suppress_frag_ndisc, | |
5284 | .maxlen = sizeof(int), | |
5285 | .mode = 0644, | |
5286 | .proc_handler = proc_dointvec | |
5287 | }, | |
d9333196 BG |
5288 | { |
5289 | .procname = "accept_ra_from_local", | |
5290 | .data = &ipv6_devconf.accept_ra_from_local, | |
5291 | .maxlen = sizeof(int), | |
5292 | .mode = 0644, | |
5293 | .proc_handler = proc_dointvec, | |
5294 | }, | |
c2943f14 HH |
5295 | { |
5296 | .procname = "accept_ra_mtu", | |
5297 | .data = &ipv6_devconf.accept_ra_mtu, | |
5298 | .maxlen = sizeof(int), | |
5299 | .mode = 0644, | |
5300 | .proc_handler = proc_dointvec, | |
5301 | }, | |
1da177e4 | 5302 | { |
f8572d8f | 5303 | /* sentinel */ |
1da177e4 LT |
5304 | } |
5305 | }, | |
1da177e4 LT |
5306 | }; |
5307 | ||
bff16c2f | 5308 | static int __addrconf_sysctl_register(struct net *net, char *dev_name, |
f8572d8f | 5309 | struct inet6_dev *idev, struct ipv6_devconf *p) |
1da177e4 LT |
5310 | { |
5311 | int i; | |
1da177e4 | 5312 | struct addrconf_sysctl_table *t; |
6105e293 | 5313 | char path[sizeof("net/ipv6/conf/") + IFNAMSIZ]; |
1dab6222 | 5314 | |
af879cc7 | 5315 | t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL); |
1da177e4 | 5316 | if (t == NULL) |
f68635e6 PE |
5317 | goto out; |
5318 | ||
bcdd553f | 5319 | for (i = 0; t->addrconf_vars[i].data; i++) { |
e21e8467 | 5320 | t->addrconf_vars[i].data += (char *)p - (char *)&ipv6_devconf; |
1da177e4 | 5321 | t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */ |
bff16c2f | 5322 | t->addrconf_vars[i].extra2 = net; |
1da177e4 | 5323 | } |
1da177e4 | 5324 | |
6105e293 | 5325 | snprintf(path, sizeof(path), "net/ipv6/conf/%s", dev_name); |
1da177e4 | 5326 | |
6105e293 | 5327 | t->sysctl_header = register_net_sysctl(net, path, t->addrconf_vars); |
1da177e4 | 5328 | if (t->sysctl_header == NULL) |
6105e293 | 5329 | goto free; |
f68635e6 PE |
5330 | |
5331 | p->sysctl = t; | |
95897312 | 5332 | return 0; |
1da177e4 | 5333 | |
f68635e6 | 5334 | free: |
1da177e4 | 5335 | kfree(t); |
f68635e6 | 5336 | out: |
95897312 | 5337 | return -ENOBUFS; |
1da177e4 LT |
5338 | } |
5339 | ||
408c4768 PE |
5340 | static void __addrconf_sysctl_unregister(struct ipv6_devconf *p) |
5341 | { | |
5342 | struct addrconf_sysctl_table *t; | |
5343 | ||
5344 | if (p->sysctl == NULL) | |
5345 | return; | |
5346 | ||
5347 | t = p->sysctl; | |
5348 | p->sysctl = NULL; | |
ff538818 | 5349 | unregister_net_sysctl_table(t->sysctl_header); |
408c4768 PE |
5350 | kfree(t); |
5351 | } | |
5352 | ||
a317a2f1 | 5353 | static int addrconf_sysctl_register(struct inet6_dev *idev) |
f52295a9 | 5354 | { |
a317a2f1 WC |
5355 | int err; |
5356 | ||
5357 | if (!sysctl_dev_name_is_allowed(idev->dev->name)) | |
5358 | return -EINVAL; | |
5359 | ||
5360 | err = neigh_sysctl_register(idev->dev, idev->nd_parms, | |
5361 | &ndisc_ifinfo_sysctl_change); | |
5362 | if (err) | |
5363 | return err; | |
5364 | err = __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name, | |
5365 | idev, &idev->cnf); | |
5366 | if (err) | |
5367 | neigh_sysctl_unregister(idev->nd_parms); | |
5368 | ||
5369 | return err; | |
f52295a9 PE |
5370 | } |
5371 | ||
408c4768 | 5372 | static void addrconf_sysctl_unregister(struct inet6_dev *idev) |
1da177e4 | 5373 | { |
408c4768 PE |
5374 | __addrconf_sysctl_unregister(&idev->cnf); |
5375 | neigh_sysctl_unregister(idev->nd_parms); | |
1da177e4 LT |
5376 | } |
5377 | ||
5378 | ||
5379 | #endif | |
5380 | ||
2c8c1e72 | 5381 | static int __net_init addrconf_init_net(struct net *net) |
e0da5a48 | 5382 | { |
a79ca223 | 5383 | int err = -ENOMEM; |
e0da5a48 PE |
5384 | struct ipv6_devconf *all, *dflt; |
5385 | ||
a79ca223 HZ |
5386 | all = kmemdup(&ipv6_devconf, sizeof(ipv6_devconf), GFP_KERNEL); |
5387 | if (all == NULL) | |
5388 | goto err_alloc_all; | |
e0da5a48 | 5389 | |
a79ca223 HZ |
5390 | dflt = kmemdup(&ipv6_devconf_dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL); |
5391 | if (dflt == NULL) | |
5392 | goto err_alloc_dflt; | |
e0da5a48 | 5393 | |
a79ca223 HZ |
5394 | /* these will be inherited by all namespaces */ |
5395 | dflt->autoconf = ipv6_defaults.autoconf; | |
5396 | dflt->disable_ipv6 = ipv6_defaults.disable_ipv6; | |
e0da5a48 PE |
5397 | |
5398 | net->ipv6.devconf_all = all; | |
5399 | net->ipv6.devconf_dflt = dflt; | |
5400 | ||
5401 | #ifdef CONFIG_SYSCTL | |
f8572d8f | 5402 | err = __addrconf_sysctl_register(net, "all", NULL, all); |
e0da5a48 PE |
5403 | if (err < 0) |
5404 | goto err_reg_all; | |
5405 | ||
f8572d8f | 5406 | err = __addrconf_sysctl_register(net, "default", NULL, dflt); |
e0da5a48 PE |
5407 | if (err < 0) |
5408 | goto err_reg_dflt; | |
5409 | #endif | |
5410 | return 0; | |
5411 | ||
5412 | #ifdef CONFIG_SYSCTL | |
5413 | err_reg_dflt: | |
5414 | __addrconf_sysctl_unregister(all); | |
5415 | err_reg_all: | |
5416 | kfree(dflt); | |
5417 | #endif | |
5418 | err_alloc_dflt: | |
5419 | kfree(all); | |
5420 | err_alloc_all: | |
5421 | return err; | |
5422 | } | |
5423 | ||
2c8c1e72 | 5424 | static void __net_exit addrconf_exit_net(struct net *net) |
e0da5a48 PE |
5425 | { |
5426 | #ifdef CONFIG_SYSCTL | |
5427 | __addrconf_sysctl_unregister(net->ipv6.devconf_dflt); | |
5428 | __addrconf_sysctl_unregister(net->ipv6.devconf_all); | |
5429 | #endif | |
73cf0e92 | 5430 | kfree(net->ipv6.devconf_dflt); |
5431 | kfree(net->ipv6.devconf_all); | |
e0da5a48 PE |
5432 | } |
5433 | ||
5434 | static struct pernet_operations addrconf_ops = { | |
5435 | .init = addrconf_init_net, | |
5436 | .exit = addrconf_exit_net, | |
5437 | }; | |
5438 | ||
207895fd | 5439 | static struct rtnl_af_ops inet6_ops __read_mostly = { |
b382b191 TG |
5440 | .family = AF_INET6, |
5441 | .fill_link_af = inet6_fill_link_af, | |
5442 | .get_link_af_size = inet6_get_link_af_size, | |
11b1f828 | 5443 | .validate_link_af = inet6_validate_link_af, |
f53adae4 | 5444 | .set_link_af = inet6_set_link_af, |
b382b191 TG |
5445 | }; |
5446 | ||
1da177e4 LT |
5447 | /* |
5448 | * Init / cleanup code | |
5449 | */ | |
5450 | ||
5451 | int __init addrconf_init(void) | |
5452 | { | |
a317a2f1 | 5453 | struct inet6_dev *idev; |
c2e21293 | 5454 | int i, err; |
2a8cc6c8 | 5455 | |
e21e8467 SH |
5456 | err = ipv6_addr_label_init(); |
5457 | if (err < 0) { | |
f3213831 JP |
5458 | pr_crit("%s: cannot initialize default policy table: %d\n", |
5459 | __func__, err); | |
2cc6d2bf | 5460 | goto out; |
2a8cc6c8 | 5461 | } |
1da177e4 | 5462 | |
2cc6d2bf NH |
5463 | err = register_pernet_subsys(&addrconf_ops); |
5464 | if (err < 0) | |
5465 | goto out_addrlabel; | |
e0da5a48 | 5466 | |
c15b1cca HFS |
5467 | addrconf_wq = create_workqueue("ipv6_addrconf"); |
5468 | if (!addrconf_wq) { | |
5469 | err = -ENOMEM; | |
5470 | goto out_nowq; | |
5471 | } | |
5472 | ||
1da177e4 LT |
5473 | /* The addrconf netdev notifier requires that loopback_dev |
5474 | * has it's ipv6 private information allocated and setup | |
5475 | * before it can bring up and give link-local addresses | |
5476 | * to other devices which are up. | |
5477 | * | |
5478 | * Unfortunately, loopback_dev is not necessarily the first | |
5479 | * entry in the global dev_base list of net devices. In fact, | |
5480 | * it is likely to be the very last entry on that list. | |
5481 | * So this causes the notifier registry below to try and | |
5482 | * give link-local addresses to all devices besides loopback_dev | |
5483 | * first, then loopback_dev, which cases all the non-loopback_dev | |
5484 | * devices to fail to get a link-local address. | |
5485 | * | |
5486 | * So, as a temporary fix, allocate the ipv6 structure for | |
5487 | * loopback_dev first by hand. | |
5488 | * Longer term, all of the dependencies ipv6 has upon the loopback | |
5489 | * device and it being up should be removed. | |
5490 | */ | |
5491 | rtnl_lock(); | |
a317a2f1 | 5492 | idev = ipv6_add_dev(init_net.loopback_dev); |
1da177e4 | 5493 | rtnl_unlock(); |
a317a2f1 WC |
5494 | if (IS_ERR(idev)) { |
5495 | err = PTR_ERR(idev); | |
e0da5a48 | 5496 | goto errlo; |
a317a2f1 | 5497 | } |
1da177e4 | 5498 | |
c2e21293 | 5499 | for (i = 0; i < IN6_ADDR_HSIZE; i++) |
5500 | INIT_HLIST_HEAD(&inet6_addr_lst[i]); | |
5501 | ||
1da177e4 LT |
5502 | register_netdevice_notifier(&ipv6_dev_notf); |
5503 | ||
c15b1cca | 5504 | addrconf_verify(); |
c127ea2c | 5505 | |
3678a9d8 | 5506 | rtnl_af_register(&inet6_ops); |
b382b191 | 5507 | |
c7ac8679 GR |
5508 | err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo, |
5509 | NULL); | |
c127ea2c TG |
5510 | if (err < 0) |
5511 | goto errout; | |
5512 | ||
5513 | /* Only the first call to __rtnl_register can fail */ | |
c7ac8679 GR |
5514 | __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL, NULL); |
5515 | __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL, NULL); | |
5516 | __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, | |
5517 | inet6_dump_ifaddr, NULL); | |
5518 | __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, | |
5519 | inet6_dump_ifmcaddr, NULL); | |
5520 | __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, | |
5521 | inet6_dump_ifacaddr, NULL); | |
76f8f6cb | 5522 | __rtnl_register(PF_INET6, RTM_GETNETCONF, inet6_netconf_get_devconf, |
7a674200 | 5523 | inet6_netconf_dump_devconf, NULL); |
c127ea2c | 5524 | |
2a8cc6c8 YH |
5525 | ipv6_addr_label_rtnl_register(); |
5526 | ||
1da177e4 | 5527 | return 0; |
c127ea2c | 5528 | errout: |
b382b191 | 5529 | rtnl_af_unregister(&inet6_ops); |
c127ea2c | 5530 | unregister_netdevice_notifier(&ipv6_dev_notf); |
e0da5a48 | 5531 | errlo: |
c15b1cca HFS |
5532 | destroy_workqueue(addrconf_wq); |
5533 | out_nowq: | |
e0da5a48 | 5534 | unregister_pernet_subsys(&addrconf_ops); |
2cc6d2bf NH |
5535 | out_addrlabel: |
5536 | ipv6_addr_label_cleanup(); | |
5537 | out: | |
c127ea2c | 5538 | return err; |
1da177e4 LT |
5539 | } |
5540 | ||
09f7709f | 5541 | void addrconf_cleanup(void) |
1da177e4 | 5542 | { |
176c39af | 5543 | struct net_device *dev; |
1da177e4 LT |
5544 | int i; |
5545 | ||
5546 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
e0da5a48 | 5547 | unregister_pernet_subsys(&addrconf_ops); |
2cc6d2bf | 5548 | ipv6_addr_label_cleanup(); |
1da177e4 LT |
5549 | |
5550 | rtnl_lock(); | |
5551 | ||
b382b191 TG |
5552 | __rtnl_af_unregister(&inet6_ops); |
5553 | ||
176c39af DL |
5554 | /* clean dev list */ |
5555 | for_each_netdev(&init_net, dev) { | |
5556 | if (__in6_dev_get(dev) == NULL) | |
5557 | continue; | |
5558 | addrconf_ifdown(dev, 1); | |
5559 | } | |
5560 | addrconf_ifdown(init_net.loopback_dev, 2); | |
5561 | ||
1da177e4 LT |
5562 | /* |
5563 | * Check hash table. | |
5564 | */ | |
5c578aed | 5565 | spin_lock_bh(&addrconf_hash_lock); |
c2e21293 | 5566 | for (i = 0; i < IN6_ADDR_HSIZE; i++) |
5567 | WARN_ON(!hlist_empty(&inet6_addr_lst[i])); | |
5c578aed | 5568 | spin_unlock_bh(&addrconf_hash_lock); |
c15b1cca | 5569 | cancel_delayed_work(&addr_chk_work); |
1da177e4 | 5570 | rtnl_unlock(); |
c15b1cca HFS |
5571 | |
5572 | destroy_workqueue(addrconf_wq); | |
1da177e4 | 5573 | } |