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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 | 48 | #include <linux/net.h> |
3d1bec99 | 49 | #include <linux/inet.h> |
1da177e4 LT |
50 | #include <linux/in6.h> |
51 | #include <linux/netdevice.h> | |
1823730f | 52 | #include <linux/if_addr.h> |
1da177e4 LT |
53 | #include <linux/if_arp.h> |
54 | #include <linux/if_arcnet.h> | |
55 | #include <linux/if_infiniband.h> | |
56 | #include <linux/route.h> | |
57 | #include <linux/inetdevice.h> | |
58 | #include <linux/init.h> | |
5a0e3ad6 | 59 | #include <linux/slab.h> |
1da177e4 LT |
60 | #ifdef CONFIG_SYSCTL |
61 | #include <linux/sysctl.h> | |
62 | #endif | |
4fc268d2 | 63 | #include <linux/capability.h> |
1da177e4 LT |
64 | #include <linux/delay.h> |
65 | #include <linux/notifier.h> | |
543537bd | 66 | #include <linux/string.h> |
ddbe5032 | 67 | #include <linux/hash.h> |
1da177e4 | 68 | |
457c4cbc | 69 | #include <net/net_namespace.h> |
1da177e4 LT |
70 | #include <net/sock.h> |
71 | #include <net/snmp.h> | |
72 | ||
06a4c1c5 | 73 | #include <net/af_ieee802154.h> |
cb6bf355 | 74 | #include <net/firewire.h> |
1da177e4 LT |
75 | #include <net/ipv6.h> |
76 | #include <net/protocol.h> | |
77 | #include <net/ndisc.h> | |
78 | #include <net/ip6_route.h> | |
79 | #include <net/addrconf.h> | |
80 | #include <net/tcp.h> | |
81 | #include <net/ip.h> | |
5d620266 | 82 | #include <net/netlink.h> |
f24e3d65 | 83 | #include <net/pkt_sched.h> |
1da177e4 LT |
84 | #include <linux/if_tunnel.h> |
85 | #include <linux/rtnetlink.h> | |
f3a1bfb1 | 86 | #include <linux/netconf.h> |
1da177e4 | 87 | #include <linux/random.h> |
e21e8467 | 88 | #include <linux/uaccess.h> |
7f7d9a6b | 89 | #include <asm/unaligned.h> |
1da177e4 LT |
90 | |
91 | #include <linux/proc_fs.h> | |
92 | #include <linux/seq_file.h> | |
bc3b2d7f | 93 | #include <linux/export.h> |
1da177e4 LT |
94 | |
95 | /* Set to 3 to get tracing... */ | |
96 | #define ACONF_DEBUG 2 | |
97 | ||
98 | #if ACONF_DEBUG >= 3 | |
ba3542e1 | 99 | #define ADBG(fmt, ...) printk(fmt, ##__VA_ARGS__) |
1da177e4 | 100 | #else |
ba3542e1 | 101 | #define ADBG(fmt, ...) do { if (0) printk(fmt, ##__VA_ARGS__); } while (0) |
1da177e4 LT |
102 | #endif |
103 | ||
104 | #define INFINITY_LIFE_TIME 0xFFFFFFFF | |
18a31e1e | 105 | |
3d1bec99 HFS |
106 | #define IPV6_MAX_STRLEN \ |
107 | sizeof("ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255") | |
108 | ||
18a31e1e TG |
109 | static inline u32 cstamp_delta(unsigned long cstamp) |
110 | { | |
111 | return (cstamp - INITIAL_JIFFIES) * 100UL / HZ; | |
112 | } | |
1da177e4 LT |
113 | |
114 | #ifdef CONFIG_SYSCTL | |
a317a2f1 | 115 | static int addrconf_sysctl_register(struct inet6_dev *idev); |
408c4768 PE |
116 | static void addrconf_sysctl_unregister(struct inet6_dev *idev); |
117 | #else | |
a317a2f1 | 118 | static inline int addrconf_sysctl_register(struct inet6_dev *idev) |
408c4768 | 119 | { |
a317a2f1 | 120 | return 0; |
408c4768 PE |
121 | } |
122 | ||
123 | static inline void addrconf_sysctl_unregister(struct inet6_dev *idev) | |
124 | { | |
125 | } | |
1da177e4 LT |
126 | #endif |
127 | ||
eb7e0575 SD |
128 | static void __ipv6_regen_rndid(struct inet6_dev *idev); |
129 | static void __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr); | |
1da177e4 | 130 | static void ipv6_regen_rndid(unsigned long data); |
1da177e4 | 131 | |
1b34be74 | 132 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev); |
1da177e4 | 133 | static int ipv6_count_addresses(struct inet6_dev *idev); |
622c81d5 HFS |
134 | static int ipv6_generate_stable_address(struct in6_addr *addr, |
135 | u8 dad_count, | |
136 | const struct inet6_dev *idev); | |
1da177e4 LT |
137 | |
138 | /* | |
139 | * Configured unicast address hash table | |
140 | */ | |
c2e21293 | 141 | static struct hlist_head inet6_addr_lst[IN6_ADDR_HSIZE]; |
5c578aed | 142 | static DEFINE_SPINLOCK(addrconf_hash_lock); |
1da177e4 | 143 | |
c15b1cca HFS |
144 | static void addrconf_verify(void); |
145 | static void addrconf_verify_rtnl(void); | |
146 | static void addrconf_verify_work(struct work_struct *); | |
1da177e4 | 147 | |
c15b1cca HFS |
148 | static struct workqueue_struct *addrconf_wq; |
149 | static DECLARE_DELAYED_WORK(addr_chk_work, addrconf_verify_work); | |
1da177e4 LT |
150 | |
151 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp); | |
152 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp); | |
153 | ||
93d9b7d7 JP |
154 | static void addrconf_type_change(struct net_device *dev, |
155 | unsigned long event); | |
1da177e4 LT |
156 | static int addrconf_ifdown(struct net_device *dev, int how); |
157 | ||
21caa662 RK |
158 | static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx, |
159 | int plen, | |
160 | const struct net_device *dev, | |
161 | u32 flags, u32 noflags); | |
162 | ||
cf22f9a2 | 163 | static void addrconf_dad_start(struct inet6_ifaddr *ifp); |
c15b1cca | 164 | static void addrconf_dad_work(struct work_struct *w); |
1da177e4 | 165 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp); |
c5e33bdd | 166 | static void addrconf_dad_run(struct inet6_dev *idev); |
1da177e4 LT |
167 | static void addrconf_rs_timer(unsigned long data); |
168 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
169 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
170 | ||
1ab1457c | 171 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 | 172 | struct prefix_info *pinfo); |
3e81c6da DM |
173 | static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
174 | struct net_device *dev); | |
1da177e4 | 175 | |
888c848e | 176 | static struct ipv6_devconf ipv6_devconf __read_mostly = { |
1da177e4 LT |
177 | .forwarding = 0, |
178 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
179 | .mtu6 = IPV6_MIN_MTU, | |
180 | .accept_ra = 1, | |
181 | .accept_redirects = 1, | |
182 | .autoconf = 1, | |
183 | .force_mld_version = 0, | |
fc4eba58 HFS |
184 | .mldv1_unsolicited_report_interval = 10 * HZ, |
185 | .mldv2_unsolicited_report_interval = HZ, | |
1da177e4 LT |
186 | .dad_transmits = 1, |
187 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
188 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
189 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
67ba4152 | 190 | .use_tempaddr = 0, |
1da177e4 LT |
191 | .temp_valid_lft = TEMP_VALID_LIFETIME, |
192 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
193 | .regen_max_retry = REGEN_MAX_RETRY, | |
194 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
1da177e4 | 195 | .max_addresses = IPV6_MAX_ADDRESSES, |
65f5c7c1 | 196 | .accept_ra_defrtr = 1, |
d9333196 | 197 | .accept_ra_from_local = 0, |
c4fd30eb | 198 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
199 | #ifdef CONFIG_IPV6_ROUTER_PREF |
200 | .accept_ra_rtr_pref = 1, | |
52e16356 | 201 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
202 | #ifdef CONFIG_IPV6_ROUTE_INFO |
203 | .accept_ra_rt_info_max_plen = 0, | |
204 | #endif | |
930d6ff2 | 205 | #endif |
fbea49e1 | 206 | .proxy_ndp = 0, |
0bcbc926 | 207 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
778d80be | 208 | .disable_ipv6 = 0, |
1b34be74 | 209 | .accept_dad = 1, |
b800c3b9 | 210 | .suppress_frag_ndisc = 1, |
c2943f14 | 211 | .accept_ra_mtu = 1, |
3d1bec99 HFS |
212 | .stable_secret = { |
213 | .initialized = false, | |
214 | } | |
1da177e4 LT |
215 | }; |
216 | ||
ab32ea5d | 217 | static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = { |
1da177e4 LT |
218 | .forwarding = 0, |
219 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
220 | .mtu6 = IPV6_MIN_MTU, | |
221 | .accept_ra = 1, | |
222 | .accept_redirects = 1, | |
223 | .autoconf = 1, | |
fc4eba58 HFS |
224 | .force_mld_version = 0, |
225 | .mldv1_unsolicited_report_interval = 10 * HZ, | |
226 | .mldv2_unsolicited_report_interval = HZ, | |
1da177e4 LT |
227 | .dad_transmits = 1, |
228 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
229 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
230 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, | |
1da177e4 LT |
231 | .use_tempaddr = 0, |
232 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
233 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
234 | .regen_max_retry = REGEN_MAX_RETRY, | |
235 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
1da177e4 | 236 | .max_addresses = IPV6_MAX_ADDRESSES, |
65f5c7c1 | 237 | .accept_ra_defrtr = 1, |
d9333196 | 238 | .accept_ra_from_local = 0, |
c4fd30eb | 239 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
240 | #ifdef CONFIG_IPV6_ROUTER_PREF |
241 | .accept_ra_rtr_pref = 1, | |
52e16356 | 242 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
243 | #ifdef CONFIG_IPV6_ROUTE_INFO |
244 | .accept_ra_rt_info_max_plen = 0, | |
245 | #endif | |
930d6ff2 | 246 | #endif |
fbea49e1 | 247 | .proxy_ndp = 0, |
0bcbc926 | 248 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
778d80be | 249 | .disable_ipv6 = 0, |
1b34be74 | 250 | .accept_dad = 1, |
b800c3b9 | 251 | .suppress_frag_ndisc = 1, |
c2943f14 | 252 | .accept_ra_mtu = 1, |
3d1bec99 HFS |
253 | .stable_secret = { |
254 | .initialized = false, | |
255 | }, | |
1da177e4 LT |
256 | }; |
257 | ||
f24e3d65 | 258 | /* Check if a valid qdisc is available */ |
05297949 | 259 | static inline bool addrconf_qdisc_ok(const struct net_device *dev) |
f24e3d65 | 260 | { |
05297949 | 261 | return !qdisc_tx_is_noop(dev); |
f24e3d65 MC |
262 | } |
263 | ||
b7b1bfce | 264 | static void addrconf_del_rs_timer(struct inet6_dev *idev) |
1da177e4 | 265 | { |
b7b1bfce HFS |
266 | if (del_timer(&idev->rs_timer)) |
267 | __in6_dev_put(idev); | |
268 | } | |
269 | ||
c15b1cca | 270 | static void addrconf_del_dad_work(struct inet6_ifaddr *ifp) |
b7b1bfce | 271 | { |
c15b1cca | 272 | if (cancel_delayed_work(&ifp->dad_work)) |
1da177e4 LT |
273 | __in6_ifa_put(ifp); |
274 | } | |
275 | ||
b7b1bfce HFS |
276 | static void addrconf_mod_rs_timer(struct inet6_dev *idev, |
277 | unsigned long when) | |
278 | { | |
279 | if (!timer_pending(&idev->rs_timer)) | |
280 | in6_dev_hold(idev); | |
281 | mod_timer(&idev->rs_timer, jiffies + when); | |
282 | } | |
1da177e4 | 283 | |
c15b1cca HFS |
284 | static void addrconf_mod_dad_work(struct inet6_ifaddr *ifp, |
285 | unsigned long delay) | |
1da177e4 | 286 | { |
c15b1cca | 287 | if (!delayed_work_pending(&ifp->dad_work)) |
1da177e4 | 288 | in6_ifa_hold(ifp); |
c15b1cca | 289 | mod_delayed_work(addrconf_wq, &ifp->dad_work, delay); |
1da177e4 LT |
290 | } |
291 | ||
7f7d9a6b HX |
292 | static int snmp6_alloc_dev(struct inet6_dev *idev) |
293 | { | |
827da44c JS |
294 | int i; |
295 | ||
698365fa WC |
296 | idev->stats.ipv6 = alloc_percpu(struct ipstats_mib); |
297 | if (!idev->stats.ipv6) | |
7f7d9a6b | 298 | goto err_ip; |
827da44c JS |
299 | |
300 | for_each_possible_cpu(i) { | |
301 | struct ipstats_mib *addrconf_stats; | |
698365fa | 302 | addrconf_stats = per_cpu_ptr(idev->stats.ipv6, i); |
827da44c | 303 | u64_stats_init(&addrconf_stats->syncp); |
827da44c JS |
304 | } |
305 | ||
306 | ||
be281e55 ED |
307 | idev->stats.icmpv6dev = kzalloc(sizeof(struct icmpv6_mib_device), |
308 | GFP_KERNEL); | |
309 | if (!idev->stats.icmpv6dev) | |
7f7d9a6b | 310 | goto err_icmp; |
be281e55 ED |
311 | idev->stats.icmpv6msgdev = kzalloc(sizeof(struct icmpv6msg_mib_device), |
312 | GFP_KERNEL); | |
313 | if (!idev->stats.icmpv6msgdev) | |
14878f75 | 314 | goto err_icmpmsg; |
7f7d9a6b HX |
315 | |
316 | return 0; | |
317 | ||
14878f75 | 318 | err_icmpmsg: |
be281e55 | 319 | kfree(idev->stats.icmpv6dev); |
7f7d9a6b | 320 | err_icmp: |
698365fa | 321 | free_percpu(idev->stats.ipv6); |
7f7d9a6b | 322 | err_ip: |
aaf70ec7 | 323 | return -ENOMEM; |
7f7d9a6b HX |
324 | } |
325 | ||
8e5e8f30 | 326 | static struct inet6_dev *ipv6_add_dev(struct net_device *dev) |
1da177e4 LT |
327 | { |
328 | struct inet6_dev *ndev; | |
a317a2f1 | 329 | int err = -ENOMEM; |
1da177e4 LT |
330 | |
331 | ASSERT_RTNL(); | |
332 | ||
333 | if (dev->mtu < IPV6_MIN_MTU) | |
a317a2f1 | 334 | return ERR_PTR(-EINVAL); |
1da177e4 | 335 | |
1ab1457c | 336 | ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL); |
63159f29 | 337 | if (!ndev) |
a317a2f1 | 338 | return ERR_PTR(err); |
322f74a4 IO |
339 | |
340 | rwlock_init(&ndev->lock); | |
341 | ndev->dev = dev; | |
502a2ffd | 342 | INIT_LIST_HEAD(&ndev->addr_list); |
b7b1bfce HFS |
343 | setup_timer(&ndev->rs_timer, addrconf_rs_timer, |
344 | (unsigned long)ndev); | |
c346dca1 | 345 | memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf)); |
322f74a4 IO |
346 | ndev->cnf.mtu6 = dev->mtu; |
347 | ndev->cnf.sysctl = NULL; | |
348 | ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); | |
63159f29 | 349 | if (!ndev->nd_parms) { |
322f74a4 | 350 | kfree(ndev); |
a317a2f1 | 351 | return ERR_PTR(err); |
322f74a4 | 352 | } |
0187bdfb BH |
353 | if (ndev->cnf.forwarding) |
354 | dev_disable_lro(dev); | |
322f74a4 IO |
355 | /* We refer to the device */ |
356 | dev_hold(dev); | |
1da177e4 | 357 | |
322f74a4 | 358 | if (snmp6_alloc_dev(ndev) < 0) { |
ba3542e1 | 359 | ADBG(KERN_WARNING |
f3213831 | 360 | "%s: cannot allocate memory for statistics; dev=%s.\n", |
ba3542e1 | 361 | __func__, dev->name); |
322f74a4 | 362 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
8603e33d RL |
363 | dev_put(dev); |
364 | kfree(ndev); | |
a317a2f1 | 365 | return ERR_PTR(err); |
322f74a4 | 366 | } |
1da177e4 | 367 | |
322f74a4 | 368 | if (snmp6_register_dev(ndev) < 0) { |
ba3542e1 | 369 | ADBG(KERN_WARNING |
f3213831 | 370 | "%s: cannot create /proc/net/dev_snmp6/%s\n", |
ba3542e1 | 371 | __func__, dev->name); |
a317a2f1 | 372 | goto err_release; |
322f74a4 IO |
373 | } |
374 | ||
375 | /* One reference from device. We must do this before | |
376 | * we invoke __ipv6_regen_rndid(). | |
377 | */ | |
378 | in6_dev_hold(ndev); | |
1da177e4 | 379 | |
1b34be74 YH |
380 | if (dev->flags & (IFF_NOARP | IFF_LOOPBACK)) |
381 | ndev->cnf.accept_dad = -1; | |
382 | ||
07a93626 | 383 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
b077d7ab | 384 | if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) { |
f3213831 | 385 | pr_info("%s: Disabled Multicast RS\n", dev->name); |
b077d7ab YH |
386 | ndev->cnf.rtr_solicits = 0; |
387 | } | |
388 | #endif | |
389 | ||
372e6c8f | 390 | INIT_LIST_HEAD(&ndev->tempaddr_list); |
b24b8a24 | 391 | setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev); |
322f74a4 IO |
392 | if ((dev->flags&IFF_LOOPBACK) || |
393 | dev->type == ARPHRD_TUNNEL || | |
9625ed72 | 394 | dev->type == ARPHRD_TUNNEL6 || |
0be669bb | 395 | dev->type == ARPHRD_SIT || |
0be669bb | 396 | dev->type == ARPHRD_NONE) { |
322f74a4 IO |
397 | ndev->cnf.use_tempaddr = -1; |
398 | } else { | |
399 | in6_dev_hold(ndev); | |
400 | ipv6_regen_rndid((unsigned long) ndev); | |
401 | } | |
5d9efa7e | 402 | |
914faa14 | 403 | ndev->token = in6addr_any; |
1da177e4 | 404 | |
f24e3d65 | 405 | if (netif_running(dev) && addrconf_qdisc_ok(dev)) |
53aadcc9 HX |
406 | ndev->if_flags |= IF_READY; |
407 | ||
322f74a4 IO |
408 | ipv6_mc_init_dev(ndev); |
409 | ndev->tstamp = jiffies; | |
a317a2f1 WC |
410 | err = addrconf_sysctl_register(ndev); |
411 | if (err) { | |
412 | ipv6_mc_destroy_dev(ndev); | |
413 | del_timer(&ndev->regen_timer); | |
414 | goto err_release; | |
415 | } | |
30c4cf57 | 416 | /* protected by rtnl_lock */ |
cf778b00 | 417 | rcu_assign_pointer(dev->ip6_ptr, ndev); |
d88ae4cc | 418 | |
2c5e8933 HFS |
419 | /* Join interface-local all-node multicast group */ |
420 | ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allnodes); | |
421 | ||
d88ae4cc | 422 | /* Join all-node multicast group */ |
f3ee4010 | 423 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes); |
d88ae4cc | 424 | |
d6ddef9e | 425 | /* Join all-router multicast group if forwarding is set */ |
8b2aaede | 426 | if (ndev->cnf.forwarding && (dev->flags & IFF_MULTICAST)) |
d6ddef9e LW |
427 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
428 | ||
1da177e4 | 429 | return ndev; |
a317a2f1 WC |
430 | |
431 | err_release: | |
432 | neigh_parms_release(&nd_tbl, ndev->nd_parms); | |
433 | ndev->dead = 1; | |
434 | in6_dev_finish_destroy(ndev); | |
435 | return ERR_PTR(err); | |
1da177e4 LT |
436 | } |
437 | ||
8e5e8f30 | 438 | static struct inet6_dev *ipv6_find_idev(struct net_device *dev) |
1da177e4 LT |
439 | { |
440 | struct inet6_dev *idev; | |
441 | ||
442 | ASSERT_RTNL(); | |
443 | ||
e21e8467 SH |
444 | idev = __in6_dev_get(dev); |
445 | if (!idev) { | |
446 | idev = ipv6_add_dev(dev); | |
a317a2f1 | 447 | if (IS_ERR(idev)) |
1da177e4 LT |
448 | return NULL; |
449 | } | |
c5e33bdd | 450 | |
1da177e4 LT |
451 | if (dev->flags&IFF_UP) |
452 | ipv6_mc_up(idev); | |
453 | return idev; | |
454 | } | |
455 | ||
f3a1bfb1 ND |
456 | static int inet6_netconf_msgsize_devconf(int type) |
457 | { | |
458 | int size = NLMSG_ALIGN(sizeof(struct netconfmsg)) | |
459 | + nla_total_size(4); /* NETCONFA_IFINDEX */ | |
460 | ||
76f8f6cb ND |
461 | /* type -1 is used for ALL */ |
462 | if (type == -1 || type == NETCONFA_FORWARDING) | |
f3a1bfb1 | 463 | size += nla_total_size(4); |
b1afce95 | 464 | #ifdef CONFIG_IPV6_MROUTE |
d67b8c61 ND |
465 | if (type == -1 || type == NETCONFA_MC_FORWARDING) |
466 | size += nla_total_size(4); | |
b1afce95 | 467 | #endif |
c92d5491 | 468 | if (type == -1 || type == NETCONFA_PROXY_NEIGH) |
469 | size += nla_total_size(4); | |
f3a1bfb1 ND |
470 | |
471 | return size; | |
472 | } | |
473 | ||
474 | static int inet6_netconf_fill_devconf(struct sk_buff *skb, int ifindex, | |
475 | struct ipv6_devconf *devconf, u32 portid, | |
476 | u32 seq, int event, unsigned int flags, | |
477 | int type) | |
478 | { | |
479 | struct nlmsghdr *nlh; | |
480 | struct netconfmsg *ncm; | |
481 | ||
482 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct netconfmsg), | |
483 | flags); | |
63159f29 | 484 | if (!nlh) |
f3a1bfb1 ND |
485 | return -EMSGSIZE; |
486 | ||
487 | ncm = nlmsg_data(nlh); | |
488 | ncm->ncm_family = AF_INET6; | |
489 | ||
490 | if (nla_put_s32(skb, NETCONFA_IFINDEX, ifindex) < 0) | |
491 | goto nla_put_failure; | |
492 | ||
76f8f6cb ND |
493 | /* type -1 is used for ALL */ |
494 | if ((type == -1 || type == NETCONFA_FORWARDING) && | |
f3a1bfb1 ND |
495 | nla_put_s32(skb, NETCONFA_FORWARDING, devconf->forwarding) < 0) |
496 | goto nla_put_failure; | |
b1afce95 | 497 | #ifdef CONFIG_IPV6_MROUTE |
d67b8c61 ND |
498 | if ((type == -1 || type == NETCONFA_MC_FORWARDING) && |
499 | nla_put_s32(skb, NETCONFA_MC_FORWARDING, | |
500 | devconf->mc_forwarding) < 0) | |
501 | goto nla_put_failure; | |
b1afce95 | 502 | #endif |
c92d5491 | 503 | if ((type == -1 || type == NETCONFA_PROXY_NEIGH) && |
504 | nla_put_s32(skb, NETCONFA_PROXY_NEIGH, devconf->proxy_ndp) < 0) | |
505 | goto nla_put_failure; | |
506 | ||
053c095a JB |
507 | nlmsg_end(skb, nlh); |
508 | return 0; | |
f3a1bfb1 ND |
509 | |
510 | nla_put_failure: | |
511 | nlmsg_cancel(skb, nlh); | |
512 | return -EMSGSIZE; | |
513 | } | |
514 | ||
d67b8c61 ND |
515 | void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex, |
516 | struct ipv6_devconf *devconf) | |
f3a1bfb1 ND |
517 | { |
518 | struct sk_buff *skb; | |
519 | int err = -ENOBUFS; | |
520 | ||
521 | skb = nlmsg_new(inet6_netconf_msgsize_devconf(type), GFP_ATOMIC); | |
63159f29 | 522 | if (!skb) |
f3a1bfb1 ND |
523 | goto errout; |
524 | ||
525 | err = inet6_netconf_fill_devconf(skb, ifindex, devconf, 0, 0, | |
526 | RTM_NEWNETCONF, 0, type); | |
527 | if (err < 0) { | |
528 | /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */ | |
529 | WARN_ON(err == -EMSGSIZE); | |
530 | kfree_skb(skb); | |
531 | goto errout; | |
532 | } | |
533 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_NETCONF, NULL, GFP_ATOMIC); | |
534 | return; | |
535 | errout: | |
bd779028 | 536 | rtnl_set_sk_err(net, RTNLGRP_IPV6_NETCONF, err); |
f3a1bfb1 ND |
537 | } |
538 | ||
76f8f6cb ND |
539 | static const struct nla_policy devconf_ipv6_policy[NETCONFA_MAX+1] = { |
540 | [NETCONFA_IFINDEX] = { .len = sizeof(int) }, | |
541 | [NETCONFA_FORWARDING] = { .len = sizeof(int) }, | |
c92d5491 | 542 | [NETCONFA_PROXY_NEIGH] = { .len = sizeof(int) }, |
76f8f6cb ND |
543 | }; |
544 | ||
545 | static int inet6_netconf_get_devconf(struct sk_buff *in_skb, | |
661d2967 | 546 | struct nlmsghdr *nlh) |
76f8f6cb ND |
547 | { |
548 | struct net *net = sock_net(in_skb->sk); | |
549 | struct nlattr *tb[NETCONFA_MAX+1]; | |
550 | struct netconfmsg *ncm; | |
551 | struct sk_buff *skb; | |
552 | struct ipv6_devconf *devconf; | |
553 | struct inet6_dev *in6_dev; | |
554 | struct net_device *dev; | |
555 | int ifindex; | |
556 | int err; | |
557 | ||
558 | err = nlmsg_parse(nlh, sizeof(*ncm), tb, NETCONFA_MAX, | |
559 | devconf_ipv6_policy); | |
560 | if (err < 0) | |
561 | goto errout; | |
562 | ||
563 | err = EINVAL; | |
564 | if (!tb[NETCONFA_IFINDEX]) | |
565 | goto errout; | |
566 | ||
567 | ifindex = nla_get_s32(tb[NETCONFA_IFINDEX]); | |
568 | switch (ifindex) { | |
569 | case NETCONFA_IFINDEX_ALL: | |
570 | devconf = net->ipv6.devconf_all; | |
571 | break; | |
572 | case NETCONFA_IFINDEX_DEFAULT: | |
573 | devconf = net->ipv6.devconf_dflt; | |
574 | break; | |
575 | default: | |
576 | dev = __dev_get_by_index(net, ifindex); | |
63159f29 | 577 | if (!dev) |
76f8f6cb ND |
578 | goto errout; |
579 | in6_dev = __in6_dev_get(dev); | |
63159f29 | 580 | if (!in6_dev) |
76f8f6cb ND |
581 | goto errout; |
582 | devconf = &in6_dev->cnf; | |
583 | break; | |
584 | } | |
585 | ||
586 | err = -ENOBUFS; | |
587 | skb = nlmsg_new(inet6_netconf_msgsize_devconf(-1), GFP_ATOMIC); | |
63159f29 | 588 | if (!skb) |
76f8f6cb ND |
589 | goto errout; |
590 | ||
591 | err = inet6_netconf_fill_devconf(skb, ifindex, devconf, | |
592 | NETLINK_CB(in_skb).portid, | |
593 | nlh->nlmsg_seq, RTM_NEWNETCONF, 0, | |
594 | -1); | |
595 | if (err < 0) { | |
596 | /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */ | |
597 | WARN_ON(err == -EMSGSIZE); | |
598 | kfree_skb(skb); | |
599 | goto errout; | |
600 | } | |
601 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); | |
602 | errout: | |
603 | return err; | |
604 | } | |
605 | ||
7a674200 ND |
606 | static int inet6_netconf_dump_devconf(struct sk_buff *skb, |
607 | struct netlink_callback *cb) | |
608 | { | |
609 | struct net *net = sock_net(skb->sk); | |
610 | int h, s_h; | |
611 | int idx, s_idx; | |
612 | struct net_device *dev; | |
613 | struct inet6_dev *idev; | |
614 | struct hlist_head *head; | |
615 | ||
616 | s_h = cb->args[0]; | |
617 | s_idx = idx = cb->args[1]; | |
618 | ||
619 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
620 | idx = 0; | |
621 | head = &net->dev_index_head[h]; | |
622 | rcu_read_lock(); | |
63998ac2 ND |
623 | cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^ |
624 | net->dev_base_seq; | |
7a674200 ND |
625 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
626 | if (idx < s_idx) | |
627 | goto cont; | |
628 | idev = __in6_dev_get(dev); | |
629 | if (!idev) | |
630 | goto cont; | |
631 | ||
632 | if (inet6_netconf_fill_devconf(skb, dev->ifindex, | |
633 | &idev->cnf, | |
634 | NETLINK_CB(cb->skb).portid, | |
635 | cb->nlh->nlmsg_seq, | |
636 | RTM_NEWNETCONF, | |
637 | NLM_F_MULTI, | |
053c095a | 638 | -1) < 0) { |
7a674200 ND |
639 | rcu_read_unlock(); |
640 | goto done; | |
641 | } | |
63998ac2 | 642 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
7a674200 ND |
643 | cont: |
644 | idx++; | |
645 | } | |
646 | rcu_read_unlock(); | |
647 | } | |
648 | if (h == NETDEV_HASHENTRIES) { | |
649 | if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_ALL, | |
650 | net->ipv6.devconf_all, | |
651 | NETLINK_CB(cb->skb).portid, | |
652 | cb->nlh->nlmsg_seq, | |
653 | RTM_NEWNETCONF, NLM_F_MULTI, | |
053c095a | 654 | -1) < 0) |
7a674200 ND |
655 | goto done; |
656 | else | |
657 | h++; | |
658 | } | |
659 | if (h == NETDEV_HASHENTRIES + 1) { | |
660 | if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_DEFAULT, | |
661 | net->ipv6.devconf_dflt, | |
662 | NETLINK_CB(cb->skb).portid, | |
663 | cb->nlh->nlmsg_seq, | |
664 | RTM_NEWNETCONF, NLM_F_MULTI, | |
053c095a | 665 | -1) < 0) |
7a674200 ND |
666 | goto done; |
667 | else | |
668 | h++; | |
669 | } | |
670 | done: | |
671 | cb->args[0] = h; | |
672 | cb->args[1] = idx; | |
673 | ||
674 | return skb->len; | |
675 | } | |
676 | ||
1da177e4 LT |
677 | #ifdef CONFIG_SYSCTL |
678 | static void dev_forward_change(struct inet6_dev *idev) | |
679 | { | |
680 | struct net_device *dev; | |
681 | struct inet6_ifaddr *ifa; | |
1da177e4 LT |
682 | |
683 | if (!idev) | |
684 | return; | |
685 | dev = idev->dev; | |
0187bdfb BH |
686 | if (idev->cnf.forwarding) |
687 | dev_disable_lro(dev); | |
1a940835 | 688 | if (dev->flags & IFF_MULTICAST) { |
2c5e8933 | 689 | if (idev->cnf.forwarding) { |
f3ee4010 | 690 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
2c5e8933 HFS |
691 | ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allrouters); |
692 | ipv6_dev_mc_inc(dev, &in6addr_sitelocal_allrouters); | |
693 | } else { | |
f3ee4010 | 694 | ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters); |
2c5e8933 HFS |
695 | ipv6_dev_mc_dec(dev, &in6addr_interfacelocal_allrouters); |
696 | ipv6_dev_mc_dec(dev, &in6addr_sitelocal_allrouters); | |
697 | } | |
1da177e4 | 698 | } |
502a2ffd | 699 | |
700 | list_for_each_entry(ifa, &idev->addr_list, if_list) { | |
2c12a74c MW |
701 | if (ifa->flags&IFA_F_TENTATIVE) |
702 | continue; | |
1da177e4 LT |
703 | if (idev->cnf.forwarding) |
704 | addrconf_join_anycast(ifa); | |
705 | else | |
706 | addrconf_leave_anycast(ifa); | |
707 | } | |
f3a1bfb1 ND |
708 | inet6_netconf_notify_devconf(dev_net(dev), NETCONFA_FORWARDING, |
709 | dev->ifindex, &idev->cnf); | |
1da177e4 LT |
710 | } |
711 | ||
712 | ||
e186932b | 713 | static void addrconf_forward_change(struct net *net, __s32 newf) |
1da177e4 LT |
714 | { |
715 | struct net_device *dev; | |
716 | struct inet6_dev *idev; | |
717 | ||
4acd4945 | 718 | for_each_netdev(net, dev) { |
1da177e4 LT |
719 | idev = __in6_dev_get(dev); |
720 | if (idev) { | |
e186932b PE |
721 | int changed = (!idev->cnf.forwarding) ^ (!newf); |
722 | idev->cnf.forwarding = newf; | |
1da177e4 LT |
723 | if (changed) |
724 | dev_forward_change(idev); | |
725 | } | |
1da177e4 | 726 | } |
1da177e4 | 727 | } |
c8fecf22 | 728 | |
013d97e9 | 729 | static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int newf) |
c8fecf22 | 730 | { |
bff16c2f | 731 | struct net *net; |
013d97e9 FR |
732 | int old; |
733 | ||
734 | if (!rtnl_trylock()) | |
735 | return restart_syscall(); | |
bff16c2f PE |
736 | |
737 | net = (struct net *)table->extra2; | |
013d97e9 FR |
738 | old = *p; |
739 | *p = newf; | |
b325fddb | 740 | |
013d97e9 | 741 | if (p == &net->ipv6.devconf_dflt->forwarding) { |
f3a1bfb1 ND |
742 | if ((!newf) ^ (!old)) |
743 | inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING, | |
744 | NETCONFA_IFINDEX_DEFAULT, | |
745 | net->ipv6.devconf_dflt); | |
013d97e9 FR |
746 | rtnl_unlock(); |
747 | return 0; | |
88af182e | 748 | } |
c8fecf22 | 749 | |
e186932b | 750 | if (p == &net->ipv6.devconf_all->forwarding) { |
e186932b PE |
751 | net->ipv6.devconf_dflt->forwarding = newf; |
752 | addrconf_forward_change(net, newf); | |
f3a1bfb1 ND |
753 | if ((!newf) ^ (!old)) |
754 | inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING, | |
755 | NETCONFA_IFINDEX_ALL, | |
756 | net->ipv6.devconf_all); | |
013d97e9 | 757 | } else if ((!newf) ^ (!old)) |
c8fecf22 | 758 | dev_forward_change((struct inet6_dev *)table->extra1); |
0187bdfb | 759 | rtnl_unlock(); |
c8fecf22 | 760 | |
013d97e9 | 761 | if (newf) |
7b4da532 | 762 | rt6_purge_dflt_routers(net); |
b325fddb | 763 | return 1; |
c8fecf22 | 764 | } |
1da177e4 LT |
765 | #endif |
766 | ||
5c578aed | 767 | /* Nobody refers to this ifaddr, destroy it */ |
1da177e4 LT |
768 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) |
769 | { | |
c2e21293 | 770 | WARN_ON(!hlist_unhashed(&ifp->addr_lst)); |
547b792c | 771 | |
1da177e4 | 772 | #ifdef NET_REFCNT_DEBUG |
91df42be | 773 | pr_debug("%s\n", __func__); |
1da177e4 LT |
774 | #endif |
775 | ||
776 | in6_dev_put(ifp->idev); | |
777 | ||
c15b1cca HFS |
778 | if (cancel_delayed_work(&ifp->dad_work)) |
779 | pr_notice("delayed DAD work was pending while freeing ifa=%p\n", | |
780 | ifp); | |
1da177e4 | 781 | |
e9d3e084 | 782 | if (ifp->state != INET6_IFADDR_STATE_DEAD) { |
f3213831 | 783 | pr_warn("Freeing alive inet6 address %p\n", ifp); |
1da177e4 LT |
784 | return; |
785 | } | |
94e187c0 | 786 | ip6_rt_put(ifp->rt); |
1da177e4 | 787 | |
e5785985 | 788 | kfree_rcu(ifp, rcu); |
1da177e4 LT |
789 | } |
790 | ||
e55ffac6 BH |
791 | static void |
792 | ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp) | |
793 | { | |
502a2ffd | 794 | struct list_head *p; |
8a6ce0c0 | 795 | int ifp_scope = ipv6_addr_src_scope(&ifp->addr); |
e55ffac6 BH |
796 | |
797 | /* | |
798 | * Each device address list is sorted in order of scope - | |
799 | * global before linklocal. | |
800 | */ | |
502a2ffd | 801 | list_for_each(p, &idev->addr_list) { |
802 | struct inet6_ifaddr *ifa | |
803 | = list_entry(p, struct inet6_ifaddr, if_list); | |
8a6ce0c0 | 804 | if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr)) |
e55ffac6 BH |
805 | break; |
806 | } | |
807 | ||
b54c9b98 | 808 | list_add_tail(&ifp->if_list, p); |
e55ffac6 BH |
809 | } |
810 | ||
ddbe5032 | 811 | static u32 inet6_addr_hash(const struct in6_addr *addr) |
3eb84f49 | 812 | { |
ddbe5032 | 813 | return hash_32(ipv6_addr_hash(addr), IN6_ADDR_HSIZE_SHIFT); |
3eb84f49 YH |
814 | } |
815 | ||
1da177e4 LT |
816 | /* On success it returns ifp with increased reference count */ |
817 | ||
818 | static struct inet6_ifaddr * | |
3f8f5298 JP |
819 | ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, |
820 | const struct in6_addr *peer_addr, int pfxlen, | |
8a226b2c | 821 | int scope, u32 flags, u32 valid_lft, u32 prefered_lft) |
1da177e4 LT |
822 | { |
823 | struct inet6_ifaddr *ifa = NULL; | |
824 | struct rt6_info *rt; | |
3a88a81d | 825 | unsigned int hash; |
1da177e4 | 826 | int err = 0; |
d68b8270 YH |
827 | int addr_type = ipv6_addr_type(addr); |
828 | ||
829 | if (addr_type == IPV6_ADDR_ANY || | |
830 | addr_type & IPV6_ADDR_MULTICAST || | |
831 | (!(idev->dev->flags & IFF_LOOPBACK) && | |
832 | addr_type & IPV6_ADDR_LOOPBACK)) | |
833 | return ERR_PTR(-EADDRNOTAVAIL); | |
1da177e4 | 834 | |
8814c4b5 | 835 | rcu_read_lock_bh(); |
1da177e4 LT |
836 | if (idev->dead) { |
837 | err = -ENODEV; /*XXX*/ | |
838 | goto out2; | |
839 | } | |
840 | ||
56d417b1 | 841 | if (idev->cnf.disable_ipv6) { |
9bdd8d40 BH |
842 | err = -EACCES; |
843 | goto out2; | |
844 | } | |
845 | ||
5c578aed | 846 | spin_lock(&addrconf_hash_lock); |
1da177e4 LT |
847 | |
848 | /* Ignore adding duplicate addresses on an interface */ | |
c346dca1 | 849 | if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) { |
ba3542e1 | 850 | ADBG("ipv6_add_addr: already assigned\n"); |
1da177e4 LT |
851 | err = -EEXIST; |
852 | goto out; | |
853 | } | |
854 | ||
322f74a4 | 855 | ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); |
1da177e4 | 856 | |
63159f29 | 857 | if (!ifa) { |
ba3542e1 | 858 | ADBG("ipv6_add_addr: malloc failed\n"); |
1da177e4 LT |
859 | err = -ENOBUFS; |
860 | goto out; | |
861 | } | |
862 | ||
8f031519 | 863 | rt = addrconf_dst_alloc(idev, addr, false); |
1da177e4 LT |
864 | if (IS_ERR(rt)) { |
865 | err = PTR_ERR(rt); | |
866 | goto out; | |
867 | } | |
868 | ||
bba24896 JP |
869 | neigh_parms_data_state_setall(idev->nd_parms); |
870 | ||
4e3fd7a0 | 871 | ifa->addr = *addr; |
3f8f5298 JP |
872 | if (peer_addr) |
873 | ifa->peer_addr = *peer_addr; | |
1da177e4 LT |
874 | |
875 | spin_lock_init(&ifa->lock); | |
c15b1cca | 876 | INIT_DELAYED_WORK(&ifa->dad_work, addrconf_dad_work); |
c2e21293 | 877 | INIT_HLIST_NODE(&ifa->addr_lst); |
1da177e4 LT |
878 | ifa->scope = scope; |
879 | ifa->prefix_len = pfxlen; | |
880 | ifa->flags = flags | IFA_F_TENTATIVE; | |
8a226b2c JB |
881 | ifa->valid_lft = valid_lft; |
882 | ifa->prefered_lft = prefered_lft; | |
1da177e4 | 883 | ifa->cstamp = ifa->tstamp = jiffies; |
617fe29d | 884 | ifa->tokenized = false; |
1da177e4 | 885 | |
57f5f544 KF |
886 | ifa->rt = rt; |
887 | ||
1da177e4 LT |
888 | ifa->idev = idev; |
889 | in6_dev_hold(idev); | |
890 | /* For caller */ | |
891 | in6_ifa_hold(ifa); | |
892 | ||
893 | /* Add to big hash table */ | |
ddbe5032 | 894 | hash = inet6_addr_hash(addr); |
1da177e4 | 895 | |
5c578aed | 896 | hlist_add_head_rcu(&ifa->addr_lst, &inet6_addr_lst[hash]); |
5c578aed | 897 | spin_unlock(&addrconf_hash_lock); |
1da177e4 LT |
898 | |
899 | write_lock(&idev->lock); | |
900 | /* Add to inet6_dev unicast addr list. */ | |
e55ffac6 | 901 | ipv6_link_dev_addr(idev, ifa); |
1da177e4 | 902 | |
1da177e4 | 903 | if (ifa->flags&IFA_F_TEMPORARY) { |
372e6c8f | 904 | list_add(&ifa->tmp_list, &idev->tempaddr_list); |
1da177e4 LT |
905 | in6_ifa_hold(ifa); |
906 | } | |
1da177e4 | 907 | |
1da177e4 LT |
908 | in6_ifa_hold(ifa); |
909 | write_unlock(&idev->lock); | |
910 | out2: | |
8814c4b5 | 911 | rcu_read_unlock_bh(); |
1da177e4 | 912 | |
fd92833a | 913 | if (likely(err == 0)) |
f88c91dd | 914 | inet6addr_notifier_call_chain(NETDEV_UP, ifa); |
1da177e4 LT |
915 | else { |
916 | kfree(ifa); | |
917 | ifa = ERR_PTR(err); | |
918 | } | |
919 | ||
920 | return ifa; | |
921 | out: | |
5c578aed | 922 | spin_unlock(&addrconf_hash_lock); |
1da177e4 LT |
923 | goto out2; |
924 | } | |
925 | ||
5b84efec TH |
926 | enum cleanup_prefix_rt_t { |
927 | CLEANUP_PREFIX_RT_NOP, /* no cleanup action for prefix route */ | |
928 | CLEANUP_PREFIX_RT_DEL, /* delete the prefix route */ | |
929 | CLEANUP_PREFIX_RT_EXPIRE, /* update the lifetime of the prefix route */ | |
930 | }; | |
931 | ||
932 | /* | |
933 | * Check, whether the prefix for ifp would still need a prefix route | |
934 | * after deleting ifp. The function returns one of the CLEANUP_PREFIX_RT_* | |
935 | * constants. | |
936 | * | |
937 | * 1) we don't purge prefix if address was not permanent. | |
938 | * prefix is managed by its own lifetime. | |
939 | * 2) we also don't purge, if the address was IFA_F_NOPREFIXROUTE. | |
940 | * 3) if there are no addresses, delete prefix. | |
941 | * 4) if there are still other permanent address(es), | |
942 | * corresponding prefix is still permanent. | |
943 | * 5) if there are still other addresses with IFA_F_NOPREFIXROUTE, | |
944 | * don't purge the prefix, assume user space is managing it. | |
945 | * 6) otherwise, update prefix lifetime to the | |
946 | * longest valid lifetime among the corresponding | |
947 | * addresses on the device. | |
948 | * Note: subsequent RA will update lifetime. | |
949 | **/ | |
950 | static enum cleanup_prefix_rt_t | |
951 | check_cleanup_prefix_route(struct inet6_ifaddr *ifp, unsigned long *expires) | |
952 | { | |
953 | struct inet6_ifaddr *ifa; | |
954 | struct inet6_dev *idev = ifp->idev; | |
955 | unsigned long lifetime; | |
956 | enum cleanup_prefix_rt_t action = CLEANUP_PREFIX_RT_DEL; | |
957 | ||
958 | *expires = jiffies; | |
959 | ||
960 | list_for_each_entry(ifa, &idev->addr_list, if_list) { | |
961 | if (ifa == ifp) | |
962 | continue; | |
963 | if (!ipv6_prefix_equal(&ifa->addr, &ifp->addr, | |
964 | ifp->prefix_len)) | |
965 | continue; | |
966 | if (ifa->flags & (IFA_F_PERMANENT | IFA_F_NOPREFIXROUTE)) | |
967 | return CLEANUP_PREFIX_RT_NOP; | |
968 | ||
969 | action = CLEANUP_PREFIX_RT_EXPIRE; | |
970 | ||
971 | spin_lock(&ifa->lock); | |
972 | ||
973 | lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ); | |
974 | /* | |
975 | * Note: Because this address is | |
976 | * not permanent, lifetime < | |
977 | * LONG_MAX / HZ here. | |
978 | */ | |
979 | if (time_before(*expires, ifa->tstamp + lifetime * HZ)) | |
980 | *expires = ifa->tstamp + lifetime * HZ; | |
981 | spin_unlock(&ifa->lock); | |
982 | } | |
983 | ||
984 | return action; | |
985 | } | |
986 | ||
987 | static void | |
988 | cleanup_prefix_route(struct inet6_ifaddr *ifp, unsigned long expires, bool del_rt) | |
989 | { | |
990 | struct rt6_info *rt; | |
991 | ||
992 | rt = addrconf_get_prefix_route(&ifp->addr, | |
993 | ifp->prefix_len, | |
994 | ifp->idev->dev, | |
995 | 0, RTF_GATEWAY | RTF_DEFAULT); | |
996 | if (rt) { | |
997 | if (del_rt) | |
998 | ip6_del_rt(rt); | |
999 | else { | |
1000 | if (!(rt->rt6i_flags & RTF_EXPIRES)) | |
1001 | rt6_set_expires(rt, expires); | |
1002 | ip6_rt_put(rt); | |
1003 | } | |
1004 | } | |
1005 | } | |
1006 | ||
1007 | ||
1da177e4 LT |
1008 | /* This function wants to get referenced ifp and releases it before return */ |
1009 | ||
1010 | static void ipv6_del_addr(struct inet6_ifaddr *ifp) | |
1011 | { | |
4c5ff6a6 | 1012 | int state; |
5b84efec TH |
1013 | enum cleanup_prefix_rt_t action = CLEANUP_PREFIX_RT_NOP; |
1014 | unsigned long expires; | |
1da177e4 | 1015 | |
c15b1cca HFS |
1016 | ASSERT_RTNL(); |
1017 | ||
8e8e676d | 1018 | spin_lock_bh(&ifp->lock); |
4c5ff6a6 | 1019 | state = ifp->state; |
e9d3e084 | 1020 | ifp->state = INET6_IFADDR_STATE_DEAD; |
8e8e676d | 1021 | spin_unlock_bh(&ifp->lock); |
4c5ff6a6 HX |
1022 | |
1023 | if (state == INET6_IFADDR_STATE_DEAD) | |
1024 | goto out; | |
1da177e4 | 1025 | |
5c578aed | 1026 | spin_lock_bh(&addrconf_hash_lock); |
1027 | hlist_del_init_rcu(&ifp->addr_lst); | |
5c578aed | 1028 | spin_unlock_bh(&addrconf_hash_lock); |
1da177e4 | 1029 | |
5b84efec | 1030 | write_lock_bh(&ifp->idev->lock); |
5d9efa7e | 1031 | |
1da177e4 | 1032 | if (ifp->flags&IFA_F_TEMPORARY) { |
372e6c8f | 1033 | list_del(&ifp->tmp_list); |
1034 | if (ifp->ifpub) { | |
1035 | in6_ifa_put(ifp->ifpub); | |
1036 | ifp->ifpub = NULL; | |
1da177e4 | 1037 | } |
372e6c8f | 1038 | __in6_ifa_put(ifp); |
1da177e4 | 1039 | } |
1da177e4 | 1040 | |
5b84efec TH |
1041 | if (ifp->flags & IFA_F_PERMANENT && !(ifp->flags & IFA_F_NOPREFIXROUTE)) |
1042 | action = check_cleanup_prefix_route(ifp, &expires); | |
502a2ffd | 1043 | |
5b84efec TH |
1044 | list_del_init(&ifp->if_list); |
1045 | __in6_ifa_put(ifp); | |
1046 | ||
1047 | write_unlock_bh(&ifp->idev->lock); | |
1da177e4 | 1048 | |
c15b1cca | 1049 | addrconf_del_dad_work(ifp); |
b2238566 | 1050 | |
1da177e4 LT |
1051 | ipv6_ifa_notify(RTM_DELADDR, ifp); |
1052 | ||
f88c91dd | 1053 | inet6addr_notifier_call_chain(NETDEV_DOWN, ifp); |
1da177e4 | 1054 | |
5b84efec TH |
1055 | if (action != CLEANUP_PREFIX_RT_NOP) { |
1056 | cleanup_prefix_route(ifp, expires, | |
1057 | action == CLEANUP_PREFIX_RT_DEL); | |
1da177e4 LT |
1058 | } |
1059 | ||
c3968a85 DW |
1060 | /* clean up prefsrc entries */ |
1061 | rt6_remove_prefsrc(ifp); | |
4c5ff6a6 | 1062 | out: |
1da177e4 LT |
1063 | in6_ifa_put(ifp); |
1064 | } | |
1065 | ||
1da177e4 LT |
1066 | static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) |
1067 | { | |
1068 | struct inet6_dev *idev = ifp->idev; | |
1069 | struct in6_addr addr, *tmpaddr; | |
76f793e3 | 1070 | unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_tstamp, age; |
eac55bf9 | 1071 | unsigned long regen_advance; |
1da177e4 LT |
1072 | int tmp_plen; |
1073 | int ret = 0; | |
95c385b4 | 1074 | u32 addr_flags; |
76f793e3 | 1075 | unsigned long now = jiffies; |
1da177e4 | 1076 | |
53bd6749 | 1077 | write_lock_bh(&idev->lock); |
1da177e4 LT |
1078 | if (ift) { |
1079 | spin_lock_bh(&ift->lock); | |
1080 | memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); | |
1081 | spin_unlock_bh(&ift->lock); | |
1082 | tmpaddr = &addr; | |
1083 | } else { | |
1084 | tmpaddr = NULL; | |
1085 | } | |
1086 | retry: | |
1087 | in6_dev_hold(idev); | |
1088 | if (idev->cnf.use_tempaddr <= 0) { | |
53bd6749 | 1089 | write_unlock_bh(&idev->lock); |
f3213831 | 1090 | pr_info("%s: use_tempaddr is disabled\n", __func__); |
1da177e4 LT |
1091 | in6_dev_put(idev); |
1092 | ret = -1; | |
1093 | goto out; | |
1094 | } | |
1095 | spin_lock_bh(&ifp->lock); | |
1096 | if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { | |
1097 | idev->cnf.use_tempaddr = -1; /*XXX*/ | |
1098 | spin_unlock_bh(&ifp->lock); | |
53bd6749 | 1099 | write_unlock_bh(&idev->lock); |
f3213831 JP |
1100 | pr_warn("%s: regeneration time exceeded - disabled temporary address support\n", |
1101 | __func__); | |
1da177e4 LT |
1102 | in6_dev_put(idev); |
1103 | ret = -1; | |
1104 | goto out; | |
1105 | } | |
1106 | in6_ifa_hold(ifp); | |
1107 | memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); | |
eb7e0575 | 1108 | __ipv6_try_regen_rndid(idev, tmpaddr); |
1da177e4 | 1109 | memcpy(&addr.s6_addr[8], idev->rndid, 8); |
76f793e3 | 1110 | age = (now - ifp->tstamp) / HZ; |
1da177e4 LT |
1111 | tmp_valid_lft = min_t(__u32, |
1112 | ifp->valid_lft, | |
7a876b0e | 1113 | idev->cnf.temp_valid_lft + age); |
1ab1457c YH |
1114 | tmp_prefered_lft = min_t(__u32, |
1115 | ifp->prefered_lft, | |
7a876b0e | 1116 | idev->cnf.temp_prefered_lft + age - |
784e2710 | 1117 | idev->cnf.max_desync_factor); |
1da177e4 | 1118 | tmp_plen = ifp->prefix_len; |
1da177e4 LT |
1119 | tmp_tstamp = ifp->tstamp; |
1120 | spin_unlock_bh(&ifp->lock); | |
1121 | ||
eac55bf9 | 1122 | regen_advance = idev->cnf.regen_max_retry * |
67ba4152 IM |
1123 | idev->cnf.dad_transmits * |
1124 | NEIGH_VAR(idev->nd_parms, RETRANS_TIME) / HZ; | |
53bd6749 | 1125 | write_unlock_bh(&idev->lock); |
95c385b4 | 1126 | |
eac55bf9 BB |
1127 | /* A temporary address is created only if this calculated Preferred |
1128 | * Lifetime is greater than REGEN_ADVANCE time units. In particular, | |
1129 | * an implementation must not create a temporary address with a zero | |
1130 | * Preferred Lifetime. | |
ecab6701 HK |
1131 | * Use age calculation as in addrconf_verify to avoid unnecessary |
1132 | * temporary addresses being generated. | |
eac55bf9 | 1133 | */ |
ecab6701 HK |
1134 | age = (now - tmp_tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ; |
1135 | if (tmp_prefered_lft <= regen_advance + age) { | |
eac55bf9 BB |
1136 | in6_ifa_put(ifp); |
1137 | in6_dev_put(idev); | |
1138 | ret = -1; | |
1139 | goto out; | |
1140 | } | |
1141 | ||
95c385b4 NH |
1142 | addr_flags = IFA_F_TEMPORARY; |
1143 | /* set in addrconf_prefix_rcv() */ | |
1144 | if (ifp->flags & IFA_F_OPTIMISTIC) | |
1145 | addr_flags |= IFA_F_OPTIMISTIC; | |
1146 | ||
4b08a8f1 HFS |
1147 | ift = ipv6_add_addr(idev, &addr, NULL, tmp_plen, |
1148 | ipv6_addr_scope(&addr), addr_flags, | |
1149 | tmp_valid_lft, tmp_prefered_lft); | |
1150 | if (IS_ERR(ift)) { | |
1da177e4 LT |
1151 | in6_ifa_put(ifp); |
1152 | in6_dev_put(idev); | |
f3213831 | 1153 | pr_info("%s: retry temporary address regeneration\n", __func__); |
1da177e4 | 1154 | tmpaddr = &addr; |
53bd6749 | 1155 | write_lock_bh(&idev->lock); |
1da177e4 LT |
1156 | goto retry; |
1157 | } | |
1158 | ||
1159 | spin_lock_bh(&ift->lock); | |
1160 | ift->ifpub = ifp; | |
76f793e3 | 1161 | ift->cstamp = now; |
1da177e4 LT |
1162 | ift->tstamp = tmp_tstamp; |
1163 | spin_unlock_bh(&ift->lock); | |
1164 | ||
cf22f9a2 | 1165 | addrconf_dad_start(ift); |
1da177e4 LT |
1166 | in6_ifa_put(ift); |
1167 | in6_dev_put(idev); | |
1168 | out: | |
1169 | return ret; | |
1170 | } | |
1da177e4 LT |
1171 | |
1172 | /* | |
072047e4 | 1173 | * Choose an appropriate source address (RFC3484) |
1da177e4 | 1174 | */ |
a9b05723 YH |
1175 | enum { |
1176 | IPV6_SADDR_RULE_INIT = 0, | |
1177 | IPV6_SADDR_RULE_LOCAL, | |
1178 | IPV6_SADDR_RULE_SCOPE, | |
1179 | IPV6_SADDR_RULE_PREFERRED, | |
1180 | #ifdef CONFIG_IPV6_MIP6 | |
1181 | IPV6_SADDR_RULE_HOA, | |
1182 | #endif | |
1183 | IPV6_SADDR_RULE_OIF, | |
1184 | IPV6_SADDR_RULE_LABEL, | |
a9b05723 | 1185 | IPV6_SADDR_RULE_PRIVACY, |
a9b05723 YH |
1186 | IPV6_SADDR_RULE_ORCHID, |
1187 | IPV6_SADDR_RULE_PREFIX, | |
7fd2561e EK |
1188 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
1189 | IPV6_SADDR_RULE_NOT_OPTIMISTIC, | |
1190 | #endif | |
a9b05723 YH |
1191 | IPV6_SADDR_RULE_MAX |
1192 | }; | |
1193 | ||
072047e4 | 1194 | struct ipv6_saddr_score { |
a9b05723 YH |
1195 | int rule; |
1196 | int addr_type; | |
1197 | struct inet6_ifaddr *ifa; | |
1198 | DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX); | |
1199 | int scopedist; | |
1200 | int matchlen; | |
072047e4 YH |
1201 | }; |
1202 | ||
a9b05723 | 1203 | struct ipv6_saddr_dst { |
9acd9f3a | 1204 | const struct in6_addr *addr; |
a9b05723 YH |
1205 | int ifindex; |
1206 | int scope; | |
1207 | int label; | |
7cbca67c | 1208 | unsigned int prefs; |
a9b05723 | 1209 | }; |
072047e4 | 1210 | |
b6f99a21 | 1211 | static inline int ipv6_saddr_preferred(int type) |
1da177e4 | 1212 | { |
45bb0060 | 1213 | if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|IPV6_ADDR_LOOPBACK)) |
072047e4 YH |
1214 | return 1; |
1215 | return 0; | |
1da177e4 LT |
1216 | } |
1217 | ||
7fd2561e EK |
1218 | static inline bool ipv6_use_optimistic_addr(struct inet6_dev *idev) |
1219 | { | |
1220 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
1221 | return idev && idev->cnf.optimistic_dad && idev->cnf.use_optimistic; | |
1222 | #else | |
1223 | return false; | |
1224 | #endif | |
1225 | } | |
1226 | ||
3de23255 BT |
1227 | static int ipv6_get_saddr_eval(struct net *net, |
1228 | struct ipv6_saddr_score *score, | |
a9b05723 YH |
1229 | struct ipv6_saddr_dst *dst, |
1230 | int i) | |
1231 | { | |
1232 | int ret; | |
1233 | ||
1234 | if (i <= score->rule) { | |
1235 | switch (i) { | |
1236 | case IPV6_SADDR_RULE_SCOPE: | |
1237 | ret = score->scopedist; | |
1238 | break; | |
1239 | case IPV6_SADDR_RULE_PREFIX: | |
1240 | ret = score->matchlen; | |
1241 | break; | |
1242 | default: | |
1243 | ret = !!test_bit(i, score->scorebits); | |
1244 | } | |
1245 | goto out; | |
1246 | } | |
1247 | ||
1248 | switch (i) { | |
1249 | case IPV6_SADDR_RULE_INIT: | |
1250 | /* Rule 0: remember if hiscore is not ready yet */ | |
1251 | ret = !!score->ifa; | |
1252 | break; | |
1253 | case IPV6_SADDR_RULE_LOCAL: | |
1254 | /* Rule 1: Prefer same address */ | |
1255 | ret = ipv6_addr_equal(&score->ifa->addr, dst->addr); | |
1256 | break; | |
1257 | case IPV6_SADDR_RULE_SCOPE: | |
1258 | /* Rule 2: Prefer appropriate scope | |
1259 | * | |
1260 | * ret | |
1261 | * ^ | |
1262 | * -1 | d 15 | |
1263 | * ---+--+-+---> scope | |
1264 | * | | |
1265 | * | d is scope of the destination. | |
1266 | * B-d | \ | |
1267 | * | \ <- smaller scope is better if | |
db9c7c39 | 1268 | * B-15 | \ if scope is enough for destination. |
a9b05723 YH |
1269 | * | ret = B - scope (-1 <= scope >= d <= 15). |
1270 | * d-C-1 | / | |
1271 | * |/ <- greater is better | |
1272 | * -C / if scope is not enough for destination. | |
1273 | * /| ret = scope - C (-1 <= d < scope <= 15). | |
1274 | * | |
1275 | * d - C - 1 < B -15 (for all -1 <= d <= 15). | |
1276 | * C > d + 14 - B >= 15 + 14 - B = 29 - B. | |
1277 | * Assume B = 0 and we get C > 29. | |
1278 | */ | |
1279 | ret = __ipv6_addr_src_scope(score->addr_type); | |
1280 | if (ret >= dst->scope) | |
1281 | ret = -ret; | |
1282 | else | |
1283 | ret -= 128; /* 30 is enough */ | |
1284 | score->scopedist = ret; | |
1285 | break; | |
1286 | case IPV6_SADDR_RULE_PREFERRED: | |
7fd2561e | 1287 | { |
a9b05723 | 1288 | /* Rule 3: Avoid deprecated and optimistic addresses */ |
7fd2561e EK |
1289 | u8 avoid = IFA_F_DEPRECATED; |
1290 | ||
1291 | if (!ipv6_use_optimistic_addr(score->ifa->idev)) | |
1292 | avoid |= IFA_F_OPTIMISTIC; | |
a9b05723 | 1293 | ret = ipv6_saddr_preferred(score->addr_type) || |
7fd2561e | 1294 | !(score->ifa->flags & avoid); |
a9b05723 | 1295 | break; |
7fd2561e | 1296 | } |
a9b05723 YH |
1297 | #ifdef CONFIG_IPV6_MIP6 |
1298 | case IPV6_SADDR_RULE_HOA: | |
7cbca67c | 1299 | { |
a9b05723 | 1300 | /* Rule 4: Prefer home address */ |
7cbca67c YH |
1301 | int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA); |
1302 | ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome; | |
a9b05723 | 1303 | break; |
7cbca67c | 1304 | } |
a9b05723 YH |
1305 | #endif |
1306 | case IPV6_SADDR_RULE_OIF: | |
1307 | /* Rule 5: Prefer outgoing interface */ | |
1308 | ret = (!dst->ifindex || | |
1309 | dst->ifindex == score->ifa->idev->dev->ifindex); | |
1310 | break; | |
1311 | case IPV6_SADDR_RULE_LABEL: | |
1312 | /* Rule 6: Prefer matching label */ | |
3de23255 BT |
1313 | ret = ipv6_addr_label(net, |
1314 | &score->ifa->addr, score->addr_type, | |
a9b05723 YH |
1315 | score->ifa->idev->dev->ifindex) == dst->label; |
1316 | break; | |
a9b05723 | 1317 | case IPV6_SADDR_RULE_PRIVACY: |
7cbca67c | 1318 | { |
a9b05723 | 1319 | /* Rule 7: Prefer public address |
25985edc | 1320 | * Note: prefer temporary address if use_tempaddr >= 2 |
a9b05723 | 1321 | */ |
7cbca67c YH |
1322 | int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ? |
1323 | !!(dst->prefs & IPV6_PREFER_SRC_TMP) : | |
1324 | score->ifa->idev->cnf.use_tempaddr >= 2; | |
1325 | ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp; | |
a9b05723 | 1326 | break; |
7cbca67c | 1327 | } |
a9b05723 YH |
1328 | case IPV6_SADDR_RULE_ORCHID: |
1329 | /* Rule 8-: Prefer ORCHID vs ORCHID or | |
1330 | * non-ORCHID vs non-ORCHID | |
1331 | */ | |
1332 | ret = !(ipv6_addr_orchid(&score->ifa->addr) ^ | |
1333 | ipv6_addr_orchid(dst->addr)); | |
1334 | break; | |
1335 | case IPV6_SADDR_RULE_PREFIX: | |
1336 | /* Rule 8: Use longest matching prefix */ | |
91b4b04f YH |
1337 | ret = ipv6_addr_diff(&score->ifa->addr, dst->addr); |
1338 | if (ret > score->ifa->prefix_len) | |
1339 | ret = score->ifa->prefix_len; | |
1340 | score->matchlen = ret; | |
a9b05723 | 1341 | break; |
7fd2561e EK |
1342 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
1343 | case IPV6_SADDR_RULE_NOT_OPTIMISTIC: | |
1344 | /* Optimistic addresses still have lower precedence than other | |
1345 | * preferred addresses. | |
1346 | */ | |
1347 | ret = !(score->ifa->flags & IFA_F_OPTIMISTIC); | |
1348 | break; | |
1349 | #endif | |
a9b05723 YH |
1350 | default: |
1351 | ret = 0; | |
1352 | } | |
1353 | ||
1354 | if (ret) | |
1355 | __set_bit(i, score->scorebits); | |
1356 | score->rule = i; | |
1357 | out: | |
1358 | return ret; | |
1359 | } | |
1360 | ||
b3f644fc | 1361 | int ipv6_dev_get_saddr(struct net *net, const struct net_device *dst_dev, |
9acd9f3a | 1362 | const struct in6_addr *daddr, unsigned int prefs, |
7cbca67c | 1363 | struct in6_addr *saddr) |
1da177e4 | 1364 | { |
a9b05723 YH |
1365 | struct ipv6_saddr_score scores[2], |
1366 | *score = &scores[0], *hiscore = &scores[1]; | |
a9b05723 | 1367 | struct ipv6_saddr_dst dst; |
072047e4 | 1368 | struct net_device *dev; |
a9b05723 | 1369 | int dst_type; |
1da177e4 | 1370 | |
a9b05723 YH |
1371 | dst_type = __ipv6_addr_type(daddr); |
1372 | dst.addr = daddr; | |
1373 | dst.ifindex = dst_dev ? dst_dev->ifindex : 0; | |
1374 | dst.scope = __ipv6_addr_src_scope(dst_type); | |
3de23255 | 1375 | dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex); |
7cbca67c | 1376 | dst.prefs = prefs; |
a9b05723 YH |
1377 | |
1378 | hiscore->rule = -1; | |
1379 | hiscore->ifa = NULL; | |
1da177e4 | 1380 | |
8814c4b5 | 1381 | rcu_read_lock(); |
1da177e4 | 1382 | |
c6d14c84 | 1383 | for_each_netdev_rcu(net, dev) { |
072047e4 | 1384 | struct inet6_dev *idev; |
072047e4 | 1385 | |
a9b05723 | 1386 | /* Candidate Source Address (section 4) |
072047e4 YH |
1387 | * - multicast and link-local destination address, |
1388 | * the set of candidate source address MUST only | |
1389 | * include addresses assigned to interfaces | |
1390 | * belonging to the same link as the outgoing | |
1391 | * interface. | |
1392 | * (- For site-local destination addresses, the | |
1393 | * set of candidate source addresses MUST only | |
1394 | * include addresses assigned to interfaces | |
1395 | * belonging to the same site as the outgoing | |
1396 | * interface.) | |
1397 | */ | |
a9b05723 YH |
1398 | if (((dst_type & IPV6_ADDR_MULTICAST) || |
1399 | dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL) && | |
1400 | dst.ifindex && dev->ifindex != dst.ifindex) | |
072047e4 | 1401 | continue; |
1da177e4 | 1402 | |
1da177e4 | 1403 | idev = __in6_dev_get(dev); |
072047e4 YH |
1404 | if (!idev) |
1405 | continue; | |
1406 | ||
1407 | read_lock_bh(&idev->lock); | |
502a2ffd | 1408 | list_for_each_entry(score->ifa, &idev->addr_list, if_list) { |
a9b05723 | 1409 | int i; |
072047e4 | 1410 | |
a9b05723 | 1411 | /* |
6b3ae80a YH |
1412 | * - Tentative Address (RFC2462 section 5.4) |
1413 | * - A tentative address is not considered | |
1414 | * "assigned to an interface" in the traditional | |
95c385b4 | 1415 | * sense, unless it is also flagged as optimistic. |
6b3ae80a | 1416 | * - Candidate Source Address (section 4) |
072047e4 YH |
1417 | * - In any case, anycast addresses, multicast |
1418 | * addresses, and the unspecified address MUST | |
1419 | * NOT be included in a candidate set. | |
1420 | */ | |
a9b05723 YH |
1421 | if ((score->ifa->flags & IFA_F_TENTATIVE) && |
1422 | (!(score->ifa->flags & IFA_F_OPTIMISTIC))) | |
6b3ae80a | 1423 | continue; |
a9b05723 YH |
1424 | |
1425 | score->addr_type = __ipv6_addr_type(&score->ifa->addr); | |
1426 | ||
1427 | if (unlikely(score->addr_type == IPV6_ADDR_ANY || | |
1428 | score->addr_type & IPV6_ADDR_MULTICAST)) { | |
ba7a46f1 JP |
1429 | net_dbg_ratelimited("ADDRCONF: unspecified / multicast address assigned as unicast address on %s", |
1430 | dev->name); | |
072047e4 YH |
1431 | continue; |
1432 | } | |
1433 | ||
a9b05723 YH |
1434 | score->rule = -1; |
1435 | bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX); | |
1436 | ||
1437 | for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) { | |
1438 | int minihiscore, miniscore; | |
1439 | ||
3de23255 BT |
1440 | minihiscore = ipv6_get_saddr_eval(net, hiscore, &dst, i); |
1441 | miniscore = ipv6_get_saddr_eval(net, score, &dst, i); | |
a9b05723 YH |
1442 | |
1443 | if (minihiscore > miniscore) { | |
1444 | if (i == IPV6_SADDR_RULE_SCOPE && | |
1445 | score->scopedist > 0) { | |
1446 | /* | |
1447 | * special case: | |
1448 | * each remaining entry | |
1449 | * has too small (not enough) | |
1450 | * scope, because ifa entries | |
1451 | * are sorted by their scope | |
1452 | * values. | |
1453 | */ | |
1454 | goto try_nextdev; | |
1455 | } | |
1456 | break; | |
1457 | } else if (minihiscore < miniscore) { | |
a9b05723 YH |
1458 | if (hiscore->ifa) |
1459 | in6_ifa_put(hiscore->ifa); | |
1460 | ||
1461 | in6_ifa_hold(score->ifa); | |
1462 | ||
a0bffffc | 1463 | swap(hiscore, score); |
a9b05723 YH |
1464 | |
1465 | /* restore our iterator */ | |
1466 | score->ifa = hiscore->ifa; | |
1467 | ||
1468 | break; | |
1da177e4 | 1469 | } |
072047e4 | 1470 | } |
1da177e4 | 1471 | } |
a9b05723 | 1472 | try_nextdev: |
072047e4 | 1473 | read_unlock_bh(&idev->lock); |
1da177e4 | 1474 | } |
8814c4b5 | 1475 | rcu_read_unlock(); |
1da177e4 | 1476 | |
a9b05723 | 1477 | if (!hiscore->ifa) |
072047e4 | 1478 | return -EADDRNOTAVAIL; |
1ab1457c | 1479 | |
4e3fd7a0 | 1480 | *saddr = hiscore->ifa->addr; |
a9b05723 | 1481 | in6_ifa_put(hiscore->ifa); |
072047e4 | 1482 | return 0; |
1da177e4 | 1483 | } |
5e5f3f0f | 1484 | EXPORT_SYMBOL(ipv6_dev_get_saddr); |
1da177e4 | 1485 | |
8965779d | 1486 | int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr, |
479840ff | 1487 | u32 banned_flags) |
b7b1bfce HFS |
1488 | { |
1489 | struct inet6_ifaddr *ifp; | |
1490 | int err = -EADDRNOTAVAIL; | |
1491 | ||
602582ca HFS |
1492 | list_for_each_entry_reverse(ifp, &idev->addr_list, if_list) { |
1493 | if (ifp->scope > IFA_LINK) | |
1494 | break; | |
b7b1bfce HFS |
1495 | if (ifp->scope == IFA_LINK && |
1496 | !(ifp->flags & banned_flags)) { | |
1497 | *addr = ifp->addr; | |
1498 | err = 0; | |
1499 | break; | |
1500 | } | |
1501 | } | |
1502 | return err; | |
1503 | } | |
1504 | ||
95c385b4 | 1505 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, |
479840ff | 1506 | u32 banned_flags) |
1da177e4 LT |
1507 | { |
1508 | struct inet6_dev *idev; | |
1509 | int err = -EADDRNOTAVAIL; | |
1510 | ||
8814c4b5 | 1511 | rcu_read_lock(); |
e21e8467 SH |
1512 | idev = __in6_dev_get(dev); |
1513 | if (idev) { | |
1da177e4 | 1514 | read_lock_bh(&idev->lock); |
b7b1bfce | 1515 | err = __ipv6_get_lladdr(idev, addr, banned_flags); |
1da177e4 LT |
1516 | read_unlock_bh(&idev->lock); |
1517 | } | |
8814c4b5 | 1518 | rcu_read_unlock(); |
1da177e4 LT |
1519 | return err; |
1520 | } | |
1521 | ||
1522 | static int ipv6_count_addresses(struct inet6_dev *idev) | |
1523 | { | |
1524 | int cnt = 0; | |
1525 | struct inet6_ifaddr *ifp; | |
1526 | ||
1527 | read_lock_bh(&idev->lock); | |
502a2ffd | 1528 | list_for_each_entry(ifp, &idev->addr_list, if_list) |
1da177e4 LT |
1529 | cnt++; |
1530 | read_unlock_bh(&idev->lock); | |
1531 | return cnt; | |
1532 | } | |
1533 | ||
b71d1d42 | 1534 | int ipv6_chk_addr(struct net *net, const struct in6_addr *addr, |
2a7851bf | 1535 | const struct net_device *dev, int strict) |
c58da4c6 EK |
1536 | { |
1537 | return ipv6_chk_addr_and_flags(net, addr, dev, strict, IFA_F_TENTATIVE); | |
1538 | } | |
1539 | EXPORT_SYMBOL(ipv6_chk_addr); | |
1540 | ||
1541 | int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr, | |
1542 | const struct net_device *dev, int strict, | |
1543 | u32 banned_flags) | |
1da177e4 | 1544 | { |
eedf042a | 1545 | struct inet6_ifaddr *ifp; |
ddbe5032 | 1546 | unsigned int hash = inet6_addr_hash(addr); |
c58da4c6 | 1547 | u32 ifp_flags; |
1da177e4 | 1548 | |
5c578aed | 1549 | rcu_read_lock_bh(); |
b67bfe0d | 1550 | hlist_for_each_entry_rcu(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1551 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
bfeade08 | 1552 | continue; |
c58da4c6 EK |
1553 | /* Decouple optimistic from tentative for evaluation here. |
1554 | * Ban optimistic addresses explicitly, when required. | |
1555 | */ | |
1556 | ifp_flags = (ifp->flags&IFA_F_OPTIMISTIC) | |
1557 | ? (ifp->flags&~IFA_F_TENTATIVE) | |
1558 | : ifp->flags; | |
1da177e4 | 1559 | if (ipv6_addr_equal(&ifp->addr, addr) && |
c58da4c6 | 1560 | !(ifp_flags&banned_flags) && |
63159f29 | 1561 | (!dev || ifp->idev->dev == dev || |
eedf042a SH |
1562 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))) { |
1563 | rcu_read_unlock_bh(); | |
1564 | return 1; | |
1da177e4 LT |
1565 | } |
1566 | } | |
5c578aed | 1567 | |
eedf042a SH |
1568 | rcu_read_unlock_bh(); |
1569 | return 0; | |
1da177e4 | 1570 | } |
c58da4c6 | 1571 | EXPORT_SYMBOL(ipv6_chk_addr_and_flags); |
7159039a | 1572 | |
3e81c6da DM |
1573 | static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
1574 | struct net_device *dev) | |
1da177e4 | 1575 | { |
ddbe5032 | 1576 | unsigned int hash = inet6_addr_hash(addr); |
c2e21293 | 1577 | struct inet6_ifaddr *ifp; |
1da177e4 | 1578 | |
b67bfe0d | 1579 | hlist_for_each_entry(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1580 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
06bfe655 | 1581 | continue; |
1da177e4 | 1582 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
63159f29 | 1583 | if (!dev || ifp->idev->dev == dev) |
3e81c6da | 1584 | return true; |
1da177e4 LT |
1585 | } |
1586 | } | |
3e81c6da | 1587 | return false; |
1da177e4 LT |
1588 | } |
1589 | ||
7df37ff3 CB |
1590 | /* Compares an address/prefix_len with addresses on device @dev. |
1591 | * If one is found it returns true. | |
1592 | */ | |
1593 | bool ipv6_chk_custom_prefix(const struct in6_addr *addr, | |
1594 | const unsigned int prefix_len, struct net_device *dev) | |
1595 | { | |
1596 | struct inet6_dev *idev; | |
1597 | struct inet6_ifaddr *ifa; | |
1598 | bool ret = false; | |
1599 | ||
1600 | rcu_read_lock(); | |
1601 | idev = __in6_dev_get(dev); | |
1602 | if (idev) { | |
1603 | read_lock_bh(&idev->lock); | |
1604 | list_for_each_entry(ifa, &idev->addr_list, if_list) { | |
1605 | ret = ipv6_prefix_equal(addr, &ifa->addr, prefix_len); | |
1606 | if (ret) | |
1607 | break; | |
1608 | } | |
1609 | read_unlock_bh(&idev->lock); | |
1610 | } | |
1611 | rcu_read_unlock(); | |
1612 | ||
1613 | return ret; | |
1614 | } | |
1615 | EXPORT_SYMBOL(ipv6_chk_custom_prefix); | |
1616 | ||
b71d1d42 | 1617 | int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev) |
52eeeb84 YH |
1618 | { |
1619 | struct inet6_dev *idev; | |
1620 | struct inet6_ifaddr *ifa; | |
1621 | int onlink; | |
1622 | ||
1623 | onlink = 0; | |
1624 | rcu_read_lock(); | |
1625 | idev = __in6_dev_get(dev); | |
1626 | if (idev) { | |
1627 | read_lock_bh(&idev->lock); | |
502a2ffd | 1628 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
52eeeb84 YH |
1629 | onlink = ipv6_prefix_equal(addr, &ifa->addr, |
1630 | ifa->prefix_len); | |
1631 | if (onlink) | |
1632 | break; | |
1633 | } | |
1634 | read_unlock_bh(&idev->lock); | |
1635 | } | |
1636 | rcu_read_unlock(); | |
1637 | return onlink; | |
1638 | } | |
52eeeb84 YH |
1639 | EXPORT_SYMBOL(ipv6_chk_prefix); |
1640 | ||
9acd9f3a | 1641 | struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr, |
1cab3da6 | 1642 | struct net_device *dev, int strict) |
1da177e4 | 1643 | { |
b79d1d54 | 1644 | struct inet6_ifaddr *ifp, *result = NULL; |
ddbe5032 | 1645 | unsigned int hash = inet6_addr_hash(addr); |
1da177e4 | 1646 | |
5c578aed | 1647 | rcu_read_lock_bh(); |
b67bfe0d | 1648 | hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1649 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
1cab3da6 | 1650 | continue; |
1da177e4 | 1651 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
63159f29 | 1652 | if (!dev || ifp->idev->dev == dev || |
1da177e4 | 1653 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { |
b79d1d54 | 1654 | result = ifp; |
1da177e4 LT |
1655 | in6_ifa_hold(ifp); |
1656 | break; | |
1657 | } | |
1658 | } | |
1659 | } | |
5c578aed | 1660 | rcu_read_unlock_bh(); |
1da177e4 | 1661 | |
b79d1d54 | 1662 | return result; |
1da177e4 LT |
1663 | } |
1664 | ||
1da177e4 LT |
1665 | /* Gets referenced address, destroys ifaddr */ |
1666 | ||
cc411d0b | 1667 | static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed) |
1da177e4 | 1668 | { |
1da177e4 LT |
1669 | if (ifp->flags&IFA_F_PERMANENT) { |
1670 | spin_lock_bh(&ifp->lock); | |
c15b1cca | 1671 | addrconf_del_dad_work(ifp); |
1da177e4 | 1672 | ifp->flags |= IFA_F_TENTATIVE; |
cc411d0b BH |
1673 | if (dad_failed) |
1674 | ifp->flags |= IFA_F_DADFAILED; | |
1da177e4 | 1675 | spin_unlock_bh(&ifp->lock); |
e2577a06 HX |
1676 | if (dad_failed) |
1677 | ipv6_ifa_notify(0, ifp); | |
1da177e4 | 1678 | in6_ifa_put(ifp); |
1da177e4 LT |
1679 | } else if (ifp->flags&IFA_F_TEMPORARY) { |
1680 | struct inet6_ifaddr *ifpub; | |
1681 | spin_lock_bh(&ifp->lock); | |
1682 | ifpub = ifp->ifpub; | |
1683 | if (ifpub) { | |
1684 | in6_ifa_hold(ifpub); | |
1685 | spin_unlock_bh(&ifp->lock); | |
1686 | ipv6_create_tempaddr(ifpub, ifp); | |
1687 | in6_ifa_put(ifpub); | |
1688 | } else { | |
1689 | spin_unlock_bh(&ifp->lock); | |
1690 | } | |
1691 | ipv6_del_addr(ifp); | |
c15b1cca | 1692 | } else { |
1da177e4 | 1693 | ipv6_del_addr(ifp); |
c15b1cca | 1694 | } |
1da177e4 LT |
1695 | } |
1696 | ||
f2344a13 HX |
1697 | static int addrconf_dad_end(struct inet6_ifaddr *ifp) |
1698 | { | |
1699 | int err = -ENOENT; | |
1700 | ||
8e8e676d | 1701 | spin_lock_bh(&ifp->lock); |
f2344a13 HX |
1702 | if (ifp->state == INET6_IFADDR_STATE_DAD) { |
1703 | ifp->state = INET6_IFADDR_STATE_POSTDAD; | |
1704 | err = 0; | |
1705 | } | |
8e8e676d | 1706 | spin_unlock_bh(&ifp->lock); |
f2344a13 HX |
1707 | |
1708 | return err; | |
1709 | } | |
1710 | ||
3c21edbd YH |
1711 | void addrconf_dad_failure(struct inet6_ifaddr *ifp) |
1712 | { | |
5f40ef77 | 1713 | struct in6_addr addr; |
1b34be74 | 1714 | struct inet6_dev *idev = ifp->idev; |
1855b7c3 | 1715 | struct net *net = dev_net(ifp->idev->dev); |
9bdd8d40 | 1716 | |
853dc2e0 UB |
1717 | if (addrconf_dad_end(ifp)) { |
1718 | in6_ifa_put(ifp); | |
f2344a13 | 1719 | return; |
853dc2e0 | 1720 | } |
f2344a13 | 1721 | |
e87cc472 JP |
1722 | net_info_ratelimited("%s: IPv6 duplicate address %pI6c detected!\n", |
1723 | ifp->idev->dev->name, &ifp->addr); | |
9bdd8d40 | 1724 | |
5f40ef77 HFS |
1725 | spin_lock_bh(&ifp->lock); |
1726 | ||
1727 | if (ifp->flags & IFA_F_STABLE_PRIVACY) { | |
1728 | int scope = ifp->scope; | |
1729 | u32 flags = ifp->flags; | |
1730 | struct in6_addr new_addr; | |
1731 | struct inet6_ifaddr *ifp2; | |
1732 | u32 valid_lft, preferred_lft; | |
1733 | int pfxlen = ifp->prefix_len; | |
5f40ef77 HFS |
1734 | int retries = ifp->stable_privacy_retry + 1; |
1735 | ||
1855b7c3 | 1736 | if (retries > net->ipv6.sysctl.idgen_retries) { |
5f40ef77 HFS |
1737 | net_info_ratelimited("%s: privacy stable address generation failed because of DAD conflicts!\n", |
1738 | ifp->idev->dev->name); | |
1739 | goto errdad; | |
1740 | } | |
1741 | ||
1742 | new_addr = ifp->addr; | |
1743 | if (ipv6_generate_stable_address(&new_addr, retries, | |
1744 | idev)) | |
1745 | goto errdad; | |
1746 | ||
1747 | valid_lft = ifp->valid_lft; | |
1748 | preferred_lft = ifp->prefered_lft; | |
1749 | ||
1750 | spin_unlock_bh(&ifp->lock); | |
1b34be74 | 1751 | |
5f40ef77 HFS |
1752 | if (idev->cnf.max_addresses && |
1753 | ipv6_count_addresses(idev) >= | |
1754 | idev->cnf.max_addresses) | |
1755 | goto lock_errdad; | |
1756 | ||
1757 | net_info_ratelimited("%s: generating new stable privacy address because of DAD conflict\n", | |
1758 | ifp->idev->dev->name); | |
1759 | ||
1760 | ifp2 = ipv6_add_addr(idev, &new_addr, NULL, pfxlen, | |
1761 | scope, flags, valid_lft, | |
1762 | preferred_lft); | |
1763 | if (IS_ERR(ifp2)) | |
1764 | goto lock_errdad; | |
1765 | ||
1766 | spin_lock_bh(&ifp2->lock); | |
1767 | ifp2->stable_privacy_retry = retries; | |
1768 | ifp2->state = INET6_IFADDR_STATE_PREDAD; | |
1769 | spin_unlock_bh(&ifp2->lock); | |
1770 | ||
1855b7c3 | 1771 | addrconf_mod_dad_work(ifp2, net->ipv6.sysctl.idgen_delay); |
5f40ef77 HFS |
1772 | in6_ifa_put(ifp2); |
1773 | lock_errdad: | |
1774 | spin_lock_bh(&ifp->lock); | |
1775 | } else if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6) { | |
1b34be74 YH |
1776 | addr.s6_addr32[0] = htonl(0xfe800000); |
1777 | addr.s6_addr32[1] = 0; | |
1778 | ||
1779 | if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) && | |
1780 | ipv6_addr_equal(&ifp->addr, &addr)) { | |
1781 | /* DAD failed for link-local based on MAC address */ | |
1782 | idev->cnf.disable_ipv6 = 1; | |
9bdd8d40 | 1783 | |
f3213831 | 1784 | pr_info("%s: IPv6 being disabled!\n", |
9bdd8d40 | 1785 | ifp->idev->dev->name); |
1b34be74 YH |
1786 | } |
1787 | } | |
1788 | ||
5f40ef77 | 1789 | errdad: |
c15b1cca HFS |
1790 | /* transition from _POSTDAD to _ERRDAD */ |
1791 | ifp->state = INET6_IFADDR_STATE_ERRDAD; | |
8e8e676d | 1792 | spin_unlock_bh(&ifp->lock); |
c15b1cca HFS |
1793 | |
1794 | addrconf_mod_dad_work(ifp, 0); | |
3c21edbd | 1795 | } |
1da177e4 | 1796 | |
a9ed4a29 SD |
1797 | /* Join to solicited addr multicast group. |
1798 | * caller must hold RTNL */ | |
b71d1d42 | 1799 | void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr) |
1da177e4 LT |
1800 | { |
1801 | struct in6_addr maddr; | |
1802 | ||
1803 | if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1804 | return; | |
1805 | ||
1806 | addrconf_addr_solict_mult(addr, &maddr); | |
1807 | ipv6_dev_mc_inc(dev, &maddr); | |
1808 | } | |
1809 | ||
a9ed4a29 | 1810 | /* caller must hold RTNL */ |
b71d1d42 | 1811 | void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr) |
1da177e4 LT |
1812 | { |
1813 | struct in6_addr maddr; | |
1814 | ||
1815 | if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
1816 | return; | |
1817 | ||
1818 | addrconf_addr_solict_mult(addr, &maddr); | |
1819 | __ipv6_dev_mc_dec(idev, &maddr); | |
1820 | } | |
1821 | ||
a9ed4a29 | 1822 | /* caller must hold RTNL */ |
20380731 | 1823 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1824 | { |
1825 | struct in6_addr addr; | |
c15b1cca | 1826 | |
88ad3149 | 1827 | if (ifp->prefix_len >= 127) /* RFC 6164 */ |
2bda8a0c | 1828 | return; |
1da177e4 LT |
1829 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
1830 | if (ipv6_addr_any(&addr)) | |
1831 | return; | |
013b4d90 | 1832 | __ipv6_dev_ac_inc(ifp->idev, &addr); |
1da177e4 LT |
1833 | } |
1834 | ||
a9ed4a29 | 1835 | /* caller must hold RTNL */ |
20380731 | 1836 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
1837 | { |
1838 | struct in6_addr addr; | |
c15b1cca | 1839 | |
88ad3149 | 1840 | if (ifp->prefix_len >= 127) /* RFC 6164 */ |
32019e65 | 1841 | return; |
1da177e4 LT |
1842 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
1843 | if (ipv6_addr_any(&addr)) | |
1844 | return; | |
1845 | __ipv6_dev_ac_dec(ifp->idev, &addr); | |
1846 | } | |
1847 | ||
073a8e0e YH |
1848 | static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) |
1849 | { | |
1850 | if (dev->addr_len != ETH_ALEN) | |
1851 | return -1; | |
1852 | memcpy(eui, dev->dev_addr, 3); | |
1853 | memcpy(eui + 5, dev->dev_addr + 3, 3); | |
1854 | ||
1855 | /* | |
1856 | * The zSeries OSA network cards can be shared among various | |
1857 | * OS instances, but the OSA cards have only one MAC address. | |
1858 | * This leads to duplicate address conflicts in conjunction | |
1859 | * with IPv6 if more than one instance uses the same card. | |
1860 | * | |
1861 | * The driver for these cards can deliver a unique 16-bit | |
1862 | * identifier for each instance sharing the same card. It is | |
1863 | * placed instead of 0xFFFE in the interface identifier. The | |
1864 | * "u" bit of the interface identifier is not inverted in this | |
1865 | * case. Hence the resulting interface identifier has local | |
1866 | * scope according to RFC2373. | |
1867 | */ | |
1868 | if (dev->dev_id) { | |
1869 | eui[3] = (dev->dev_id >> 8) & 0xFF; | |
1870 | eui[4] = dev->dev_id & 0xFF; | |
1871 | } else { | |
1872 | eui[3] = 0xFF; | |
1873 | eui[4] = 0xFE; | |
1874 | eui[0] ^= 2; | |
1875 | } | |
1876 | return 0; | |
1877 | } | |
1878 | ||
06a4c1c5 | 1879 | static int addrconf_ifid_eui64(u8 *eui, struct net_device *dev) |
1880 | { | |
1881 | if (dev->addr_len != IEEE802154_ADDR_LEN) | |
1882 | return -1; | |
1883 | memcpy(eui, dev->dev_addr, 8); | |
5e98a36e | 1884 | eui[0] ^= 2; |
06a4c1c5 | 1885 | return 0; |
1886 | } | |
1887 | ||
cb6bf355 YH |
1888 | static int addrconf_ifid_ieee1394(u8 *eui, struct net_device *dev) |
1889 | { | |
1890 | union fwnet_hwaddr *ha; | |
1891 | ||
1892 | if (dev->addr_len != FWNET_ALEN) | |
1893 | return -1; | |
1894 | ||
1895 | ha = (union fwnet_hwaddr *)dev->dev_addr; | |
1896 | ||
1897 | memcpy(eui, &ha->uc.uniq_id, sizeof(ha->uc.uniq_id)); | |
1898 | eui[0] ^= 2; | |
1899 | return 0; | |
1900 | } | |
1901 | ||
073a8e0e YH |
1902 | static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) |
1903 | { | |
1904 | /* XXX: inherit EUI-64 from other interface -- yoshfuji */ | |
1905 | if (dev->addr_len != ARCNET_ALEN) | |
1906 | return -1; | |
1907 | memset(eui, 0, 7); | |
8e5e8f30 | 1908 | eui[7] = *(u8 *)dev->dev_addr; |
073a8e0e YH |
1909 | return 0; |
1910 | } | |
1911 | ||
1912 | static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) | |
1913 | { | |
1914 | if (dev->addr_len != INFINIBAND_ALEN) | |
1915 | return -1; | |
1916 | memcpy(eui, dev->dev_addr + 12, 8); | |
1917 | eui[0] |= 2; | |
1918 | return 0; | |
1919 | } | |
1920 | ||
c61393ea | 1921 | static int __ipv6_isatap_ifid(u8 *eui, __be32 addr) |
dfd982ba | 1922 | { |
9af28511 SH |
1923 | if (addr == 0) |
1924 | return -1; | |
dfd982ba YH |
1925 | eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) || |
1926 | ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) || | |
1927 | ipv4_is_private_172(addr) || ipv4_is_test_192(addr) || | |
1928 | ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) || | |
1929 | ipv4_is_test_198(addr) || ipv4_is_multicast(addr) || | |
1930 | ipv4_is_lbcast(addr)) ? 0x00 : 0x02; | |
1931 | eui[1] = 0; | |
1932 | eui[2] = 0x5E; | |
1933 | eui[3] = 0xFE; | |
1934 | memcpy(eui + 4, &addr, 4); | |
1935 | return 0; | |
1936 | } | |
dfd982ba YH |
1937 | |
1938 | static int addrconf_ifid_sit(u8 *eui, struct net_device *dev) | |
1939 | { | |
1940 | if (dev->priv_flags & IFF_ISATAP) | |
1941 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); | |
1942 | return -1; | |
1943 | } | |
1944 | ||
aee80b54 | 1945 | static int addrconf_ifid_gre(u8 *eui, struct net_device *dev) |
1946 | { | |
1947 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); | |
1948 | } | |
1949 | ||
e837735e ND |
1950 | static int addrconf_ifid_ip6tnl(u8 *eui, struct net_device *dev) |
1951 | { | |
1952 | memcpy(eui, dev->perm_addr, 3); | |
1953 | memcpy(eui + 5, dev->perm_addr + 3, 3); | |
1954 | eui[3] = 0xFF; | |
1955 | eui[4] = 0xFE; | |
1956 | eui[0] ^= 2; | |
1957 | return 0; | |
1958 | } | |
1959 | ||
1da177e4 LT |
1960 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) |
1961 | { | |
1962 | switch (dev->type) { | |
1963 | case ARPHRD_ETHER: | |
1964 | case ARPHRD_FDDI: | |
073a8e0e | 1965 | return addrconf_ifid_eui48(eui, dev); |
1da177e4 | 1966 | case ARPHRD_ARCNET: |
073a8e0e | 1967 | return addrconf_ifid_arcnet(eui, dev); |
1da177e4 | 1968 | case ARPHRD_INFINIBAND: |
073a8e0e | 1969 | return addrconf_ifid_infiniband(eui, dev); |
c7dc89c0 | 1970 | case ARPHRD_SIT: |
dfd982ba | 1971 | return addrconf_ifid_sit(eui, dev); |
aee80b54 | 1972 | case ARPHRD_IPGRE: |
1973 | return addrconf_ifid_gre(eui, dev); | |
e74bccb8 | 1974 | case ARPHRD_6LOWPAN: |
06a4c1c5 | 1975 | case ARPHRD_IEEE802154: |
1976 | return addrconf_ifid_eui64(eui, dev); | |
cb6bf355 YH |
1977 | case ARPHRD_IEEE1394: |
1978 | return addrconf_ifid_ieee1394(eui, dev); | |
e837735e ND |
1979 | case ARPHRD_TUNNEL6: |
1980 | return addrconf_ifid_ip6tnl(eui, dev); | |
1da177e4 LT |
1981 | } |
1982 | return -1; | |
1983 | } | |
1984 | ||
1985 | static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) | |
1986 | { | |
1987 | int err = -1; | |
1988 | struct inet6_ifaddr *ifp; | |
1989 | ||
1990 | read_lock_bh(&idev->lock); | |
602582ca HFS |
1991 | list_for_each_entry_reverse(ifp, &idev->addr_list, if_list) { |
1992 | if (ifp->scope > IFA_LINK) | |
1993 | break; | |
1da177e4 LT |
1994 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { |
1995 | memcpy(eui, ifp->addr.s6_addr+8, 8); | |
1996 | err = 0; | |
1997 | break; | |
1998 | } | |
1999 | } | |
2000 | read_unlock_bh(&idev->lock); | |
2001 | return err; | |
2002 | } | |
2003 | ||
1da177e4 | 2004 | /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ |
eb7e0575 | 2005 | static void __ipv6_regen_rndid(struct inet6_dev *idev) |
1da177e4 | 2006 | { |
1da177e4 | 2007 | regen: |
955189ef | 2008 | get_random_bytes(idev->rndid, sizeof(idev->rndid)); |
1da177e4 | 2009 | idev->rndid[0] &= ~0x02; |
1da177e4 LT |
2010 | |
2011 | /* | |
2012 | * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: | |
2013 | * check if generated address is not inappropriate | |
2014 | * | |
2015 | * - Reserved subnet anycast (RFC 2526) | |
2016 | * 11111101 11....11 1xxxxxxx | |
c7dc89c0 | 2017 | * - ISATAP (RFC4214) 6.1 |
1da177e4 LT |
2018 | * 00-00-5E-FE-xx-xx-xx-xx |
2019 | * - value 0 | |
2020 | * - XXX: already assigned to an address on the device | |
2021 | */ | |
1ab1457c | 2022 | if (idev->rndid[0] == 0xfd && |
1da177e4 LT |
2023 | (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && |
2024 | (idev->rndid[7]&0x80)) | |
2025 | goto regen; | |
2026 | if ((idev->rndid[0]|idev->rndid[1]) == 0) { | |
2027 | if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) | |
2028 | goto regen; | |
2029 | if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) | |
2030 | goto regen; | |
2031 | } | |
1da177e4 LT |
2032 | } |
2033 | ||
2034 | static void ipv6_regen_rndid(unsigned long data) | |
2035 | { | |
2036 | struct inet6_dev *idev = (struct inet6_dev *) data; | |
2037 | unsigned long expires; | |
2038 | ||
8814c4b5 | 2039 | rcu_read_lock_bh(); |
1da177e4 LT |
2040 | write_lock_bh(&idev->lock); |
2041 | ||
2042 | if (idev->dead) | |
2043 | goto out; | |
2044 | ||
eb7e0575 | 2045 | __ipv6_regen_rndid(idev); |
1ab1457c | 2046 | |
1da177e4 | 2047 | expires = jiffies + |
1ab1457c | 2048 | idev->cnf.temp_prefered_lft * HZ - |
1f9248e5 JP |
2049 | idev->cnf.regen_max_retry * idev->cnf.dad_transmits * |
2050 | NEIGH_VAR(idev->nd_parms, RETRANS_TIME) - | |
784e2710 | 2051 | idev->cnf.max_desync_factor * HZ; |
1da177e4 | 2052 | if (time_before(expires, jiffies)) { |
f3213831 JP |
2053 | pr_warn("%s: too short regeneration interval; timer disabled for %s\n", |
2054 | __func__, idev->dev->name); | |
1da177e4 LT |
2055 | goto out; |
2056 | } | |
2057 | ||
2058 | if (!mod_timer(&idev->regen_timer, expires)) | |
2059 | in6_dev_hold(idev); | |
2060 | ||
2061 | out: | |
2062 | write_unlock_bh(&idev->lock); | |
8814c4b5 | 2063 | rcu_read_unlock_bh(); |
1da177e4 LT |
2064 | in6_dev_put(idev); |
2065 | } | |
2066 | ||
eb7e0575 | 2067 | static void __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) |
8e5e8f30 | 2068 | { |
1da177e4 | 2069 | if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) |
eb7e0575 | 2070 | __ipv6_regen_rndid(idev); |
1da177e4 | 2071 | } |
1da177e4 LT |
2072 | |
2073 | /* | |
2074 | * Add prefix route. | |
2075 | */ | |
2076 | ||
2077 | static void | |
2078 | addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev, | |
e431b8c0 | 2079 | unsigned long expires, u32 flags) |
1da177e4 | 2080 | { |
86872cb5 TG |
2081 | struct fib6_config cfg = { |
2082 | .fc_table = RT6_TABLE_PREFIX, | |
2083 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
2084 | .fc_ifindex = dev->ifindex, | |
2085 | .fc_expires = expires, | |
2086 | .fc_dst_len = plen, | |
2087 | .fc_flags = RTF_UP | flags, | |
c346dca1 | 2088 | .fc_nlinfo.nl_net = dev_net(dev), |
f410a1fb | 2089 | .fc_protocol = RTPROT_KERNEL, |
86872cb5 | 2090 | }; |
1da177e4 | 2091 | |
4e3fd7a0 | 2092 | cfg.fc_dst = *pfx; |
1da177e4 LT |
2093 | |
2094 | /* Prevent useless cloning on PtP SIT. | |
2095 | This thing is done here expecting that the whole | |
2096 | class of non-broadcast devices need not cloning. | |
2097 | */ | |
07a93626 | 2098 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
86872cb5 TG |
2099 | if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT)) |
2100 | cfg.fc_flags |= RTF_NONEXTHOP; | |
0be669bb | 2101 | #endif |
1da177e4 | 2102 | |
86872cb5 | 2103 | ip6_route_add(&cfg); |
1da177e4 LT |
2104 | } |
2105 | ||
14ef37b6 AH |
2106 | |
2107 | static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx, | |
2108 | int plen, | |
2109 | const struct net_device *dev, | |
2110 | u32 flags, u32 noflags) | |
2111 | { | |
2112 | struct fib6_node *fn; | |
2113 | struct rt6_info *rt = NULL; | |
2114 | struct fib6_table *table; | |
2115 | ||
2116 | table = fib6_get_table(dev_net(dev), RT6_TABLE_PREFIX); | |
63159f29 | 2117 | if (!table) |
14ef37b6 AH |
2118 | return NULL; |
2119 | ||
5744dd9b | 2120 | read_lock_bh(&table->tb6_lock); |
14ef37b6 AH |
2121 | fn = fib6_locate(&table->tb6_root, pfx, plen, NULL, 0); |
2122 | if (!fn) | |
2123 | goto out; | |
1f56a01f MKL |
2124 | |
2125 | noflags |= RTF_CACHE; | |
14ef37b6 | 2126 | for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) { |
d1918542 | 2127 | if (rt->dst.dev->ifindex != dev->ifindex) |
14ef37b6 AH |
2128 | continue; |
2129 | if ((rt->rt6i_flags & flags) != flags) | |
2130 | continue; | |
85da53bf | 2131 | if ((rt->rt6i_flags & noflags) != 0) |
14ef37b6 AH |
2132 | continue; |
2133 | dst_hold(&rt->dst); | |
2134 | break; | |
2135 | } | |
2136 | out: | |
5744dd9b | 2137 | read_unlock_bh(&table->tb6_lock); |
14ef37b6 AH |
2138 | return rt; |
2139 | } | |
2140 | ||
2141 | ||
1da177e4 LT |
2142 | /* Create "default" multicast route to the interface */ |
2143 | ||
2144 | static void addrconf_add_mroute(struct net_device *dev) | |
2145 | { | |
86872cb5 TG |
2146 | struct fib6_config cfg = { |
2147 | .fc_table = RT6_TABLE_LOCAL, | |
2148 | .fc_metric = IP6_RT_PRIO_ADDRCONF, | |
2149 | .fc_ifindex = dev->ifindex, | |
2150 | .fc_dst_len = 8, | |
2151 | .fc_flags = RTF_UP, | |
c346dca1 | 2152 | .fc_nlinfo.nl_net = dev_net(dev), |
86872cb5 TG |
2153 | }; |
2154 | ||
2155 | ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); | |
2156 | ||
2157 | ip6_route_add(&cfg); | |
1da177e4 LT |
2158 | } |
2159 | ||
1da177e4 LT |
2160 | static struct inet6_dev *addrconf_add_dev(struct net_device *dev) |
2161 | { | |
2162 | struct inet6_dev *idev; | |
2163 | ||
2164 | ASSERT_RTNL(); | |
2165 | ||
e21e8467 SH |
2166 | idev = ipv6_find_idev(dev); |
2167 | if (!idev) | |
64e724f6 BH |
2168 | return ERR_PTR(-ENOBUFS); |
2169 | ||
2170 | if (idev->cnf.disable_ipv6) | |
2171 | return ERR_PTR(-EACCES); | |
1da177e4 LT |
2172 | |
2173 | /* Add default multicast route */ | |
4af04aba LW |
2174 | if (!(dev->flags & IFF_LOOPBACK)) |
2175 | addrconf_add_mroute(dev); | |
1da177e4 | 2176 | |
1da177e4 LT |
2177 | return idev; |
2178 | } | |
2179 | ||
53bd6749 JP |
2180 | static void manage_tempaddrs(struct inet6_dev *idev, |
2181 | struct inet6_ifaddr *ifp, | |
2182 | __u32 valid_lft, __u32 prefered_lft, | |
2183 | bool create, unsigned long now) | |
2184 | { | |
2185 | u32 flags; | |
2186 | struct inet6_ifaddr *ift; | |
2187 | ||
2188 | read_lock_bh(&idev->lock); | |
2189 | /* update all temporary addresses in the list */ | |
2190 | list_for_each_entry(ift, &idev->tempaddr_list, tmp_list) { | |
2191 | int age, max_valid, max_prefered; | |
2192 | ||
2193 | if (ifp != ift->ifpub) | |
2194 | continue; | |
2195 | ||
2196 | /* RFC 4941 section 3.3: | |
2197 | * If a received option will extend the lifetime of a public | |
2198 | * address, the lifetimes of temporary addresses should | |
2199 | * be extended, subject to the overall constraint that no | |
2200 | * temporary addresses should ever remain "valid" or "preferred" | |
2201 | * for a time longer than (TEMP_VALID_LIFETIME) or | |
2202 | * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR), respectively. | |
2203 | */ | |
2204 | age = (now - ift->cstamp) / HZ; | |
2205 | max_valid = idev->cnf.temp_valid_lft - age; | |
2206 | if (max_valid < 0) | |
2207 | max_valid = 0; | |
2208 | ||
2209 | max_prefered = idev->cnf.temp_prefered_lft - | |
2210 | idev->cnf.max_desync_factor - age; | |
2211 | if (max_prefered < 0) | |
2212 | max_prefered = 0; | |
2213 | ||
2214 | if (valid_lft > max_valid) | |
2215 | valid_lft = max_valid; | |
2216 | ||
2217 | if (prefered_lft > max_prefered) | |
2218 | prefered_lft = max_prefered; | |
2219 | ||
2220 | spin_lock(&ift->lock); | |
2221 | flags = ift->flags; | |
2222 | ift->valid_lft = valid_lft; | |
2223 | ift->prefered_lft = prefered_lft; | |
2224 | ift->tstamp = now; | |
2225 | if (prefered_lft > 0) | |
2226 | ift->flags &= ~IFA_F_DEPRECATED; | |
2227 | ||
2228 | spin_unlock(&ift->lock); | |
2229 | if (!(flags&IFA_F_TENTATIVE)) | |
2230 | ipv6_ifa_notify(0, ift); | |
2231 | } | |
2232 | ||
2233 | if ((create || list_empty(&idev->tempaddr_list)) && | |
2234 | idev->cnf.use_tempaddr > 0) { | |
2235 | /* When a new public address is created as described | |
2236 | * in [ADDRCONF], also create a new temporary address. | |
2237 | * Also create a temporary address if it's enabled but | |
2238 | * no temporary address currently exists. | |
2239 | */ | |
2240 | read_unlock_bh(&idev->lock); | |
2241 | ipv6_create_tempaddr(ifp, NULL); | |
2242 | } else { | |
2243 | read_unlock_bh(&idev->lock); | |
2244 | } | |
2245 | } | |
2246 | ||
e6bff995 | 2247 | void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao) |
1da177e4 LT |
2248 | { |
2249 | struct prefix_info *pinfo; | |
2250 | __u32 valid_lft; | |
2251 | __u32 prefered_lft; | |
2252 | int addr_type; | |
64236f3f | 2253 | u32 addr_flags = 0; |
1da177e4 | 2254 | struct inet6_dev *in6_dev; |
56d417b1 | 2255 | struct net *net = dev_net(dev); |
1da177e4 LT |
2256 | |
2257 | pinfo = (struct prefix_info *) opt; | |
1ab1457c | 2258 | |
1da177e4 | 2259 | if (len < sizeof(struct prefix_info)) { |
ba3542e1 | 2260 | ADBG("addrconf: prefix option too short\n"); |
1da177e4 LT |
2261 | return; |
2262 | } | |
1ab1457c | 2263 | |
1da177e4 LT |
2264 | /* |
2265 | * Validation checks ([ADDRCONF], page 19) | |
2266 | */ | |
2267 | ||
2268 | addr_type = ipv6_addr_type(&pinfo->prefix); | |
2269 | ||
2270 | if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) | |
2271 | return; | |
2272 | ||
2273 | valid_lft = ntohl(pinfo->valid); | |
2274 | prefered_lft = ntohl(pinfo->prefered); | |
2275 | ||
2276 | if (prefered_lft > valid_lft) { | |
e87cc472 | 2277 | net_warn_ratelimited("addrconf: prefix option has invalid lifetime\n"); |
1da177e4 LT |
2278 | return; |
2279 | } | |
2280 | ||
2281 | in6_dev = in6_dev_get(dev); | |
2282 | ||
63159f29 | 2283 | if (!in6_dev) { |
e87cc472 JP |
2284 | net_dbg_ratelimited("addrconf: device %s not configured\n", |
2285 | dev->name); | |
1da177e4 LT |
2286 | return; |
2287 | } | |
2288 | ||
2289 | /* | |
2290 | * Two things going on here: | |
2291 | * 1) Add routes for on-link prefixes | |
2292 | * 2) Configure prefixes with the auto flag set | |
2293 | */ | |
2294 | ||
4bed72e4 YH |
2295 | if (pinfo->onlink) { |
2296 | struct rt6_info *rt; | |
2297 | unsigned long rt_expires; | |
2298 | ||
6f704992 YH |
2299 | /* Avoid arithmetic overflow. Really, we could |
2300 | * save rt_expires in seconds, likely valid_lft, | |
2301 | * but it would require division in fib gc, that it | |
2302 | * not good. | |
2303 | */ | |
4bed72e4 YH |
2304 | if (HZ > USER_HZ) |
2305 | rt_expires = addrconf_timeout_fixup(valid_lft, HZ); | |
2306 | else | |
2307 | rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ); | |
3dd4bc68 | 2308 | |
4bed72e4 YH |
2309 | if (addrconf_finite_timeout(rt_expires)) |
2310 | rt_expires *= HZ; | |
1da177e4 | 2311 | |
14ef37b6 AH |
2312 | rt = addrconf_get_prefix_route(&pinfo->prefix, |
2313 | pinfo->prefix_len, | |
2314 | dev, | |
2315 | RTF_ADDRCONF | RTF_PREFIX_RT, | |
2316 | RTF_GATEWAY | RTF_DEFAULT); | |
1da177e4 | 2317 | |
14ef37b6 | 2318 | if (rt) { |
6f704992 YH |
2319 | /* Autoconf prefix route */ |
2320 | if (valid_lft == 0) { | |
2321 | ip6_del_rt(rt); | |
2322 | rt = NULL; | |
4bed72e4 | 2323 | } else if (addrconf_finite_timeout(rt_expires)) { |
6f704992 | 2324 | /* not infinity */ |
1716a961 | 2325 | rt6_set_expires(rt, jiffies + rt_expires); |
6f704992 | 2326 | } else { |
1716a961 | 2327 | rt6_clean_expires(rt); |
1da177e4 LT |
2328 | } |
2329 | } else if (valid_lft) { | |
6f704992 | 2330 | clock_t expires = 0; |
4bed72e4 YH |
2331 | int flags = RTF_ADDRCONF | RTF_PREFIX_RT; |
2332 | if (addrconf_finite_timeout(rt_expires)) { | |
6f704992 YH |
2333 | /* not infinity */ |
2334 | flags |= RTF_EXPIRES; | |
2335 | expires = jiffies_to_clock_t(rt_expires); | |
2336 | } | |
1da177e4 | 2337 | addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, |
6f704992 | 2338 | dev, expires, flags); |
1da177e4 | 2339 | } |
94e187c0 | 2340 | ip6_rt_put(rt); |
1da177e4 LT |
2341 | } |
2342 | ||
2343 | /* Try to figure out our local address for this prefix */ | |
2344 | ||
2345 | if (pinfo->autoconf && in6_dev->cnf.autoconf) { | |
8e5e8f30 | 2346 | struct inet6_ifaddr *ifp; |
1da177e4 LT |
2347 | struct in6_addr addr; |
2348 | int create = 0, update_lft = 0; | |
617fe29d | 2349 | bool tokenized = false; |
1da177e4 LT |
2350 | |
2351 | if (pinfo->prefix_len == 64) { | |
2352 | memcpy(&addr, &pinfo->prefix, 8); | |
f53adae4 DB |
2353 | |
2354 | if (!ipv6_addr_any(&in6_dev->token)) { | |
2355 | read_lock_bh(&in6_dev->lock); | |
2356 | memcpy(addr.s6_addr + 8, | |
2357 | in6_dev->token.s6_addr + 8, 8); | |
2358 | read_unlock_bh(&in6_dev->lock); | |
617fe29d | 2359 | tokenized = true; |
622c81d5 HFS |
2360 | } else if (in6_dev->addr_gen_mode == |
2361 | IN6_ADDR_GEN_MODE_STABLE_PRIVACY && | |
2362 | !ipv6_generate_stable_address(&addr, 0, | |
2363 | in6_dev)) { | |
64236f3f | 2364 | addr_flags |= IFA_F_STABLE_PRIVACY; |
622c81d5 | 2365 | goto ok; |
f53adae4 DB |
2366 | } else if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && |
2367 | ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { | |
1da177e4 LT |
2368 | in6_dev_put(in6_dev); |
2369 | return; | |
2370 | } | |
2371 | goto ok; | |
2372 | } | |
e87cc472 JP |
2373 | net_dbg_ratelimited("IPv6 addrconf: prefix with wrong length %d\n", |
2374 | pinfo->prefix_len); | |
1da177e4 LT |
2375 | in6_dev_put(in6_dev); |
2376 | return; | |
2377 | ||
2378 | ok: | |
2379 | ||
53b7997f | 2380 | ifp = ipv6_get_ifaddr(net, &addr, dev, 1); |
1da177e4 | 2381 | |
63159f29 | 2382 | if (!ifp && valid_lft) { |
1da177e4 | 2383 | int max_addresses = in6_dev->cnf.max_addresses; |
95c385b4 NH |
2384 | |
2385 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
2386 | if (in6_dev->cnf.optimistic_dad && | |
e6bff995 | 2387 | !net->ipv6.devconf_all->forwarding && sllao) |
95c385b4 NH |
2388 | addr_flags = IFA_F_OPTIMISTIC; |
2389 | #endif | |
1da177e4 LT |
2390 | |
2391 | /* Do not allow to create too much of autoconfigured | |
2392 | * addresses; this would be too easy way to crash kernel. | |
2393 | */ | |
2394 | if (!max_addresses || | |
2395 | ipv6_count_addresses(in6_dev) < max_addresses) | |
3f8f5298 JP |
2396 | ifp = ipv6_add_addr(in6_dev, &addr, NULL, |
2397 | pinfo->prefix_len, | |
95c385b4 | 2398 | addr_type&IPV6_ADDR_SCOPE_MASK, |
8a226b2c JB |
2399 | addr_flags, valid_lft, |
2400 | prefered_lft); | |
1da177e4 | 2401 | |
3f0d2ba0 | 2402 | if (IS_ERR_OR_NULL(ifp)) { |
1da177e4 LT |
2403 | in6_dev_put(in6_dev); |
2404 | return; | |
2405 | } | |
2406 | ||
8a226b2c JB |
2407 | update_lft = 0; |
2408 | create = 1; | |
c15b1cca HFS |
2409 | spin_lock_bh(&ifp->lock); |
2410 | ifp->flags |= IFA_F_MANAGETEMPADDR; | |
1da177e4 | 2411 | ifp->cstamp = jiffies; |
617fe29d | 2412 | ifp->tokenized = tokenized; |
c15b1cca | 2413 | spin_unlock_bh(&ifp->lock); |
cf22f9a2 | 2414 | addrconf_dad_start(ifp); |
1da177e4 LT |
2415 | } |
2416 | ||
2417 | if (ifp) { | |
479840ff | 2418 | u32 flags; |
1da177e4 | 2419 | unsigned long now; |
1da177e4 LT |
2420 | u32 stored_lft; |
2421 | ||
2422 | /* update lifetime (RFC2462 5.5.3 e) */ | |
8e8e676d | 2423 | spin_lock_bh(&ifp->lock); |
1da177e4 LT |
2424 | now = jiffies; |
2425 | if (ifp->valid_lft > (now - ifp->tstamp) / HZ) | |
2426 | stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; | |
2427 | else | |
2428 | stored_lft = 0; | |
8a226b2c | 2429 | if (!update_lft && !create && stored_lft) { |
9451a304 FF |
2430 | const u32 minimum_lft = min_t(u32, |
2431 | stored_lft, MIN_VALID_LIFETIME); | |
c9d55d5b PM |
2432 | valid_lft = max(valid_lft, minimum_lft); |
2433 | ||
2434 | /* RFC4862 Section 5.5.3e: | |
2435 | * "Note that the preferred lifetime of the | |
2436 | * corresponding address is always reset to | |
2437 | * the Preferred Lifetime in the received | |
2438 | * Prefix Information option, regardless of | |
2439 | * whether the valid lifetime is also reset or | |
2440 | * ignored." | |
2441 | * | |
2442 | * So we should always update prefered_lft here. | |
2443 | */ | |
2444 | update_lft = 1; | |
1da177e4 LT |
2445 | } |
2446 | ||
2447 | if (update_lft) { | |
2448 | ifp->valid_lft = valid_lft; | |
2449 | ifp->prefered_lft = prefered_lft; | |
2450 | ifp->tstamp = now; | |
2451 | flags = ifp->flags; | |
2452 | ifp->flags &= ~IFA_F_DEPRECATED; | |
8e8e676d | 2453 | spin_unlock_bh(&ifp->lock); |
1da177e4 LT |
2454 | |
2455 | if (!(flags&IFA_F_TENTATIVE)) | |
2456 | ipv6_ifa_notify(0, ifp); | |
2457 | } else | |
8e8e676d | 2458 | spin_unlock_bh(&ifp->lock); |
1da177e4 | 2459 | |
53bd6749 JP |
2460 | manage_tempaddrs(in6_dev, ifp, valid_lft, prefered_lft, |
2461 | create, now); | |
5d9efa7e | 2462 | |
1da177e4 | 2463 | in6_ifa_put(ifp); |
c15b1cca | 2464 | addrconf_verify(); |
1da177e4 LT |
2465 | } |
2466 | } | |
2467 | inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); | |
2468 | in6_dev_put(in6_dev); | |
2469 | } | |
2470 | ||
2471 | /* | |
2472 | * Set destination address. | |
2473 | * Special case for SIT interfaces where we create a new "virtual" | |
2474 | * device. | |
2475 | */ | |
af284937 | 2476 | int addrconf_set_dstaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2477 | { |
2478 | struct in6_ifreq ireq; | |
2479 | struct net_device *dev; | |
2480 | int err = -EINVAL; | |
2481 | ||
2482 | rtnl_lock(); | |
2483 | ||
2484 | err = -EFAULT; | |
2485 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2486 | goto err_exit; | |
2487 | ||
af284937 | 2488 | dev = __dev_get_by_index(net, ireq.ifr6_ifindex); |
1da177e4 LT |
2489 | |
2490 | err = -ENODEV; | |
63159f29 | 2491 | if (!dev) |
1da177e4 LT |
2492 | goto err_exit; |
2493 | ||
07a93626 | 2494 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 | 2495 | if (dev->type == ARPHRD_SIT) { |
5bc3eb7e | 2496 | const struct net_device_ops *ops = dev->netdev_ops; |
1da177e4 | 2497 | struct ifreq ifr; |
1da177e4 LT |
2498 | struct ip_tunnel_parm p; |
2499 | ||
2500 | err = -EADDRNOTAVAIL; | |
2501 | if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) | |
2502 | goto err_exit; | |
2503 | ||
2504 | memset(&p, 0, sizeof(p)); | |
2505 | p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; | |
2506 | p.iph.saddr = 0; | |
2507 | p.iph.version = 4; | |
2508 | p.iph.ihl = 5; | |
2509 | p.iph.protocol = IPPROTO_IPV6; | |
2510 | p.iph.ttl = 64; | |
d20b3109 | 2511 | ifr.ifr_ifru.ifru_data = (__force void __user *)&p; |
1da177e4 | 2512 | |
5bc3eb7e SH |
2513 | if (ops->ndo_do_ioctl) { |
2514 | mm_segment_t oldfs = get_fs(); | |
2515 | ||
2516 | set_fs(KERNEL_DS); | |
2517 | err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL); | |
2518 | set_fs(oldfs); | |
2519 | } else | |
2520 | err = -EOPNOTSUPP; | |
1da177e4 LT |
2521 | |
2522 | if (err == 0) { | |
2523 | err = -ENOBUFS; | |
af284937 DL |
2524 | dev = __dev_get_by_name(net, p.name); |
2525 | if (!dev) | |
1da177e4 LT |
2526 | goto err_exit; |
2527 | err = dev_open(dev); | |
2528 | } | |
2529 | } | |
0be669bb | 2530 | #endif |
1da177e4 LT |
2531 | |
2532 | err_exit: | |
2533 | rtnl_unlock(); | |
2534 | return err; | |
2535 | } | |
2536 | ||
93a714d6 MC |
2537 | static int ipv6_mc_config(struct sock *sk, bool join, |
2538 | const struct in6_addr *addr, int ifindex) | |
2539 | { | |
2540 | int ret; | |
2541 | ||
2542 | ASSERT_RTNL(); | |
2543 | ||
2544 | lock_sock(sk); | |
2545 | if (join) | |
54ff9ef3 | 2546 | ret = ipv6_sock_mc_join(sk, ifindex, addr); |
93a714d6 | 2547 | else |
54ff9ef3 | 2548 | ret = ipv6_sock_mc_drop(sk, ifindex, addr); |
93a714d6 MC |
2549 | release_sock(sk); |
2550 | ||
2551 | return ret; | |
2552 | } | |
2553 | ||
1da177e4 LT |
2554 | /* |
2555 | * Manual configuration of address on an interface | |
2556 | */ | |
479840ff JP |
2557 | static int inet6_addr_add(struct net *net, int ifindex, |
2558 | const struct in6_addr *pfx, | |
caeaba79 | 2559 | const struct in6_addr *peer_pfx, |
479840ff JP |
2560 | unsigned int plen, __u32 ifa_flags, |
2561 | __u32 prefered_lft, __u32 valid_lft) | |
1da177e4 LT |
2562 | { |
2563 | struct inet6_ifaddr *ifp; | |
2564 | struct inet6_dev *idev; | |
2565 | struct net_device *dev; | |
93a714d6 MC |
2566 | unsigned long timeout; |
2567 | clock_t expires; | |
1da177e4 | 2568 | int scope; |
6f704992 | 2569 | u32 flags; |
1da177e4 LT |
2570 | |
2571 | ASSERT_RTNL(); | |
1ab1457c | 2572 | |
24ef0da7 TG |
2573 | if (plen > 128) |
2574 | return -EINVAL; | |
2575 | ||
0778769d NT |
2576 | /* check the lifetime */ |
2577 | if (!valid_lft || prefered_lft > valid_lft) | |
2578 | return -EINVAL; | |
2579 | ||
53bd6749 JP |
2580 | if (ifa_flags & IFA_F_MANAGETEMPADDR && plen != 64) |
2581 | return -EINVAL; | |
2582 | ||
af284937 DL |
2583 | dev = __dev_get_by_index(net, ifindex); |
2584 | if (!dev) | |
1da177e4 | 2585 | return -ENODEV; |
1ab1457c | 2586 | |
64e724f6 BH |
2587 | idev = addrconf_add_dev(dev); |
2588 | if (IS_ERR(idev)) | |
2589 | return PTR_ERR(idev); | |
1da177e4 | 2590 | |
93a714d6 MC |
2591 | if (ifa_flags & IFA_F_MCAUTOJOIN) { |
2592 | int ret = ipv6_mc_config(net->ipv6.mc_autojoin_sk, | |
2593 | true, pfx, ifindex); | |
2594 | ||
2595 | if (ret < 0) | |
2596 | return ret; | |
2597 | } | |
2598 | ||
1da177e4 LT |
2599 | scope = ipv6_addr_scope(pfx); |
2600 | ||
4bed72e4 YH |
2601 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
2602 | if (addrconf_finite_timeout(timeout)) { | |
2603 | expires = jiffies_to_clock_t(timeout * HZ); | |
2604 | valid_lft = timeout; | |
6f704992 | 2605 | flags = RTF_EXPIRES; |
4bed72e4 YH |
2606 | } else { |
2607 | expires = 0; | |
2608 | flags = 0; | |
2609 | ifa_flags |= IFA_F_PERMANENT; | |
6f704992 | 2610 | } |
0778769d | 2611 | |
4bed72e4 YH |
2612 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
2613 | if (addrconf_finite_timeout(timeout)) { | |
2614 | if (timeout == 0) | |
2615 | ifa_flags |= IFA_F_DEPRECATED; | |
2616 | prefered_lft = timeout; | |
2617 | } | |
0778769d | 2618 | |
8a226b2c JB |
2619 | ifp = ipv6_add_addr(idev, pfx, peer_pfx, plen, scope, ifa_flags, |
2620 | valid_lft, prefered_lft); | |
0778769d | 2621 | |
1da177e4 | 2622 | if (!IS_ERR(ifp)) { |
761aac73 TH |
2623 | if (!(ifa_flags & IFA_F_NOPREFIXROUTE)) { |
2624 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, | |
2625 | expires, flags); | |
2626 | } | |
2627 | ||
95c385b4 NH |
2628 | /* |
2629 | * Note that section 3.1 of RFC 4429 indicates | |
2630 | * that the Optimistic flag should not be set for | |
2631 | * manually configured addresses | |
2632 | */ | |
cf22f9a2 | 2633 | addrconf_dad_start(ifp); |
53bd6749 JP |
2634 | if (ifa_flags & IFA_F_MANAGETEMPADDR) |
2635 | manage_tempaddrs(idev, ifp, valid_lft, prefered_lft, | |
2636 | true, jiffies); | |
1da177e4 | 2637 | in6_ifa_put(ifp); |
c15b1cca | 2638 | addrconf_verify_rtnl(); |
1da177e4 | 2639 | return 0; |
93a714d6 MC |
2640 | } else if (ifa_flags & IFA_F_MCAUTOJOIN) { |
2641 | ipv6_mc_config(net->ipv6.mc_autojoin_sk, | |
2642 | false, pfx, ifindex); | |
1da177e4 LT |
2643 | } |
2644 | ||
2645 | return PTR_ERR(ifp); | |
2646 | } | |
2647 | ||
6046d5b4 HK |
2648 | static int inet6_addr_del(struct net *net, int ifindex, u32 ifa_flags, |
2649 | const struct in6_addr *pfx, unsigned int plen) | |
1da177e4 LT |
2650 | { |
2651 | struct inet6_ifaddr *ifp; | |
2652 | struct inet6_dev *idev; | |
2653 | struct net_device *dev; | |
1ab1457c | 2654 | |
24ef0da7 TG |
2655 | if (plen > 128) |
2656 | return -EINVAL; | |
2657 | ||
af284937 DL |
2658 | dev = __dev_get_by_index(net, ifindex); |
2659 | if (!dev) | |
1da177e4 LT |
2660 | return -ENODEV; |
2661 | ||
e5d08d71 | 2662 | idev = __in6_dev_get(dev); |
63159f29 | 2663 | if (!idev) |
1da177e4 LT |
2664 | return -ENXIO; |
2665 | ||
2666 | read_lock_bh(&idev->lock); | |
502a2ffd | 2667 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
1da177e4 LT |
2668 | if (ifp->prefix_len == plen && |
2669 | ipv6_addr_equal(pfx, &ifp->addr)) { | |
2670 | in6_ifa_hold(ifp); | |
2671 | read_unlock_bh(&idev->lock); | |
1ab1457c | 2672 | |
6046d5b4 HK |
2673 | if (!(ifp->flags & IFA_F_TEMPORARY) && |
2674 | (ifa_flags & IFA_F_MANAGETEMPADDR)) | |
2675 | manage_tempaddrs(idev, ifp, 0, 0, false, | |
2676 | jiffies); | |
1da177e4 | 2677 | ipv6_del_addr(ifp); |
6046d5b4 | 2678 | addrconf_verify_rtnl(); |
93a714d6 MC |
2679 | if (ipv6_addr_is_multicast(pfx)) { |
2680 | ipv6_mc_config(net->ipv6.mc_autojoin_sk, | |
2681 | false, pfx, dev->ifindex); | |
2682 | } | |
1da177e4 LT |
2683 | return 0; |
2684 | } | |
2685 | } | |
2686 | read_unlock_bh(&idev->lock); | |
2687 | return -EADDRNOTAVAIL; | |
2688 | } | |
2689 | ||
2690 | ||
af284937 | 2691 | int addrconf_add_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2692 | { |
2693 | struct in6_ifreq ireq; | |
2694 | int err; | |
1ab1457c | 2695 | |
af31f412 | 2696 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 | 2697 | return -EPERM; |
1ab1457c | 2698 | |
1da177e4 LT |
2699 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
2700 | return -EFAULT; | |
2701 | ||
2702 | rtnl_lock(); | |
caeaba79 | 2703 | err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, NULL, |
af284937 DL |
2704 | ireq.ifr6_prefixlen, IFA_F_PERMANENT, |
2705 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); | |
1da177e4 LT |
2706 | rtnl_unlock(); |
2707 | return err; | |
2708 | } | |
2709 | ||
af284937 | 2710 | int addrconf_del_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2711 | { |
2712 | struct in6_ifreq ireq; | |
2713 | int err; | |
1ab1457c | 2714 | |
af31f412 | 2715 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 LT |
2716 | return -EPERM; |
2717 | ||
2718 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2719 | return -EFAULT; | |
2720 | ||
2721 | rtnl_lock(); | |
6046d5b4 | 2722 | err = inet6_addr_del(net, ireq.ifr6_ifindex, 0, &ireq.ifr6_addr, |
af284937 | 2723 | ireq.ifr6_prefixlen); |
1da177e4 LT |
2724 | rtnl_unlock(); |
2725 | return err; | |
2726 | } | |
2727 | ||
b5f348e5 IJ |
2728 | static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr, |
2729 | int plen, int scope) | |
2730 | { | |
2731 | struct inet6_ifaddr *ifp; | |
2732 | ||
8a226b2c | 2733 | ifp = ipv6_add_addr(idev, addr, NULL, plen, |
07edd741 HFS |
2734 | scope, IFA_F_PERMANENT, |
2735 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); | |
b5f348e5 IJ |
2736 | if (!IS_ERR(ifp)) { |
2737 | spin_lock_bh(&ifp->lock); | |
2738 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2739 | spin_unlock_bh(&ifp->lock); | |
2740 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
2741 | in6_ifa_put(ifp); | |
2742 | } | |
2743 | } | |
2744 | ||
07a93626 | 2745 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 LT |
2746 | static void sit_add_v4_addrs(struct inet6_dev *idev) |
2747 | { | |
1da177e4 LT |
2748 | struct in6_addr addr; |
2749 | struct net_device *dev; | |
c346dca1 | 2750 | struct net *net = dev_net(idev->dev); |
929c9cf3 | 2751 | int scope, plen; |
f0e2acfa | 2752 | u32 pflags = 0; |
1da177e4 LT |
2753 | |
2754 | ASSERT_RTNL(); | |
2755 | ||
2756 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2757 | memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); | |
2758 | ||
2759 | if (idev->dev->flags&IFF_POINTOPOINT) { | |
2760 | addr.s6_addr32[0] = htonl(0xfe800000); | |
2761 | scope = IFA_LINK; | |
929c9cf3 | 2762 | plen = 64; |
1da177e4 LT |
2763 | } else { |
2764 | scope = IPV6_ADDR_COMPATv4; | |
929c9cf3 | 2765 | plen = 96; |
f0e2acfa | 2766 | pflags |= RTF_NONEXTHOP; |
1da177e4 LT |
2767 | } |
2768 | ||
2769 | if (addr.s6_addr32[3]) { | |
929c9cf3 | 2770 | add_addr(idev, &addr, plen, scope); |
f0e2acfa | 2771 | addrconf_prefix_route(&addr, plen, idev->dev, 0, pflags); |
1da177e4 LT |
2772 | return; |
2773 | } | |
2774 | ||
6fda7350 | 2775 | for_each_netdev(net, dev) { |
8e5e8f30 | 2776 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
1da177e4 | 2777 | if (in_dev && (dev->flags & IFF_UP)) { |
8e5e8f30 | 2778 | struct in_ifaddr *ifa; |
1da177e4 LT |
2779 | |
2780 | int flag = scope; | |
2781 | ||
2782 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { | |
1da177e4 LT |
2783 | |
2784 | addr.s6_addr32[3] = ifa->ifa_local; | |
2785 | ||
2786 | if (ifa->ifa_scope == RT_SCOPE_LINK) | |
2787 | continue; | |
2788 | if (ifa->ifa_scope >= RT_SCOPE_HOST) { | |
2789 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2790 | continue; | |
2791 | flag |= IFA_HOST; | |
2792 | } | |
1da177e4 | 2793 | |
b5f348e5 | 2794 | add_addr(idev, &addr, plen, flag); |
f0e2acfa ND |
2795 | addrconf_prefix_route(&addr, plen, idev->dev, 0, |
2796 | pflags); | |
1da177e4 LT |
2797 | } |
2798 | } | |
1ab1457c | 2799 | } |
1da177e4 | 2800 | } |
0be669bb | 2801 | #endif |
1da177e4 LT |
2802 | |
2803 | static void init_loopback(struct net_device *dev) | |
2804 | { | |
2805 | struct inet6_dev *idev; | |
25fb6ca4 BK |
2806 | struct net_device *sp_dev; |
2807 | struct inet6_ifaddr *sp_ifa; | |
2808 | struct rt6_info *sp_rt; | |
1da177e4 LT |
2809 | |
2810 | /* ::1 */ | |
2811 | ||
2812 | ASSERT_RTNL(); | |
2813 | ||
e5d08d71 | 2814 | idev = ipv6_find_idev(dev); |
63159f29 | 2815 | if (!idev) { |
91df42be | 2816 | pr_debug("%s: add_dev failed\n", __func__); |
1da177e4 LT |
2817 | return; |
2818 | } | |
2819 | ||
b5f348e5 | 2820 | add_addr(idev, &in6addr_loopback, 128, IFA_HOST); |
25fb6ca4 BK |
2821 | |
2822 | /* Add routes to other interface's IPv6 addresses */ | |
2823 | for_each_netdev(dev_net(dev), sp_dev) { | |
2824 | if (!strcmp(sp_dev->name, dev->name)) | |
2825 | continue; | |
2826 | ||
2827 | idev = __in6_dev_get(sp_dev); | |
2828 | if (!idev) | |
2829 | continue; | |
2830 | ||
2831 | read_lock_bh(&idev->lock); | |
2832 | list_for_each_entry(sp_ifa, &idev->addr_list, if_list) { | |
2833 | ||
2834 | if (sp_ifa->flags & (IFA_F_DADFAILED | IFA_F_TENTATIVE)) | |
2835 | continue; | |
2836 | ||
33d99113 G |
2837 | if (sp_ifa->rt) { |
2838 | /* This dst has been added to garbage list when | |
2839 | * lo device down, release this obsolete dst and | |
2840 | * reallocate a new router for ifa. | |
2841 | */ | |
2842 | if (sp_ifa->rt->dst.obsolete > 0) { | |
2843 | ip6_rt_put(sp_ifa->rt); | |
2844 | sp_ifa->rt = NULL; | |
2845 | } else { | |
2846 | continue; | |
2847 | } | |
2848 | } | |
a881ae1f | 2849 | |
57ec0afe | 2850 | sp_rt = addrconf_dst_alloc(idev, &sp_ifa->addr, false); |
25fb6ca4 BK |
2851 | |
2852 | /* Failure cases are ignored */ | |
534c8779 G |
2853 | if (!IS_ERR(sp_rt)) { |
2854 | sp_ifa->rt = sp_rt; | |
25fb6ca4 | 2855 | ip6_ins_rt(sp_rt); |
534c8779 | 2856 | } |
25fb6ca4 BK |
2857 | } |
2858 | read_unlock_bh(&idev->lock); | |
2859 | } | |
1da177e4 LT |
2860 | } |
2861 | ||
64236f3f HFS |
2862 | static void addrconf_add_linklocal(struct inet6_dev *idev, |
2863 | const struct in6_addr *addr, u32 flags) | |
1da177e4 | 2864 | { |
8e5e8f30 | 2865 | struct inet6_ifaddr *ifp; |
64236f3f | 2866 | u32 addr_flags = flags | IFA_F_PERMANENT; |
95c385b4 NH |
2867 | |
2868 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
2869 | if (idev->cnf.optimistic_dad && | |
702beb87 | 2870 | !dev_net(idev->dev)->ipv6.devconf_all->forwarding) |
95c385b4 NH |
2871 | addr_flags |= IFA_F_OPTIMISTIC; |
2872 | #endif | |
1da177e4 | 2873 | |
07edd741 HFS |
2874 | ifp = ipv6_add_addr(idev, addr, NULL, 64, IFA_LINK, addr_flags, |
2875 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); | |
1da177e4 | 2876 | if (!IS_ERR(ifp)) { |
46d48046 | 2877 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0); |
cf22f9a2 | 2878 | addrconf_dad_start(ifp); |
1da177e4 LT |
2879 | in6_ifa_put(ifp); |
2880 | } | |
2881 | } | |
2882 | ||
622c81d5 HFS |
2883 | static bool ipv6_reserved_interfaceid(struct in6_addr address) |
2884 | { | |
2885 | if ((address.s6_addr32[2] | address.s6_addr32[3]) == 0) | |
2886 | return true; | |
2887 | ||
2888 | if (address.s6_addr32[2] == htonl(0x02005eff) && | |
2889 | ((address.s6_addr32[3] & htonl(0xfe000000)) == htonl(0xfe000000))) | |
2890 | return true; | |
2891 | ||
2892 | if (address.s6_addr32[2] == htonl(0xfdffffff) && | |
2893 | ((address.s6_addr32[3] & htonl(0xffffff80)) == htonl(0xffffff80))) | |
2894 | return true; | |
2895 | ||
2896 | return false; | |
2897 | } | |
2898 | ||
2899 | static int ipv6_generate_stable_address(struct in6_addr *address, | |
2900 | u8 dad_count, | |
2901 | const struct inet6_dev *idev) | |
2902 | { | |
622c81d5 HFS |
2903 | static DEFINE_SPINLOCK(lock); |
2904 | static __u32 digest[SHA_DIGEST_WORDS]; | |
2905 | static __u32 workspace[SHA_WORKSPACE_WORDS]; | |
2906 | ||
2907 | static union { | |
2908 | char __data[SHA_MESSAGE_BYTES]; | |
2909 | struct { | |
2910 | struct in6_addr secret; | |
ff40217e | 2911 | __be32 prefix[2]; |
622c81d5 HFS |
2912 | unsigned char hwaddr[MAX_ADDR_LEN]; |
2913 | u8 dad_count; | |
2914 | } __packed; | |
2915 | } data; | |
2916 | ||
2917 | struct in6_addr secret; | |
2918 | struct in6_addr temp; | |
2919 | struct net *net = dev_net(idev->dev); | |
2920 | ||
2921 | BUILD_BUG_ON(sizeof(data.__data) != sizeof(data)); | |
2922 | ||
2923 | if (idev->cnf.stable_secret.initialized) | |
2924 | secret = idev->cnf.stable_secret.secret; | |
2925 | else if (net->ipv6.devconf_dflt->stable_secret.initialized) | |
2926 | secret = net->ipv6.devconf_dflt->stable_secret.secret; | |
2927 | else | |
2928 | return -1; | |
2929 | ||
2930 | retry: | |
2931 | spin_lock_bh(&lock); | |
2932 | ||
2933 | sha_init(digest); | |
2934 | memset(&data, 0, sizeof(data)); | |
2935 | memset(workspace, 0, sizeof(workspace)); | |
2936 | memcpy(data.hwaddr, idev->dev->perm_addr, idev->dev->addr_len); | |
ff40217e HFS |
2937 | data.prefix[0] = address->s6_addr32[0]; |
2938 | data.prefix[1] = address->s6_addr32[1]; | |
622c81d5 HFS |
2939 | data.secret = secret; |
2940 | data.dad_count = dad_count; | |
2941 | ||
2942 | sha_transform(digest, data.__data, workspace); | |
2943 | ||
2944 | temp = *address; | |
ff40217e HFS |
2945 | temp.s6_addr32[2] = (__force __be32)digest[0]; |
2946 | temp.s6_addr32[3] = (__force __be32)digest[1]; | |
622c81d5 HFS |
2947 | |
2948 | spin_unlock_bh(&lock); | |
2949 | ||
2950 | if (ipv6_reserved_interfaceid(temp)) { | |
2951 | dad_count++; | |
1855b7c3 | 2952 | if (dad_count > dev_net(idev->dev)->ipv6.sysctl.idgen_retries) |
622c81d5 HFS |
2953 | return -1; |
2954 | goto retry; | |
2955 | } | |
2956 | ||
2957 | *address = temp; | |
2958 | return 0; | |
2959 | } | |
2960 | ||
bc91b0f0 JP |
2961 | static void addrconf_addr_gen(struct inet6_dev *idev, bool prefix_route) |
2962 | { | |
622c81d5 HFS |
2963 | struct in6_addr addr; |
2964 | ||
2965 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); | |
bc91b0f0 | 2966 | |
622c81d5 HFS |
2967 | if (idev->addr_gen_mode == IN6_ADDR_GEN_MODE_STABLE_PRIVACY) { |
2968 | if (!ipv6_generate_stable_address(&addr, 0, idev)) | |
64236f3f HFS |
2969 | addrconf_add_linklocal(idev, &addr, |
2970 | IFA_F_STABLE_PRIVACY); | |
622c81d5 HFS |
2971 | else if (prefix_route) |
2972 | addrconf_prefix_route(&addr, 64, idev->dev, 0, 0); | |
2973 | } else if (idev->addr_gen_mode == IN6_ADDR_GEN_MODE_EUI64) { | |
bc91b0f0 JP |
2974 | /* addrconf_add_linklocal also adds a prefix_route and we |
2975 | * only need to care about prefix routes if ipv6_generate_eui64 | |
2976 | * couldn't generate one. | |
2977 | */ | |
2978 | if (ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) == 0) | |
64236f3f | 2979 | addrconf_add_linklocal(idev, &addr, 0); |
bc91b0f0 JP |
2980 | else if (prefix_route) |
2981 | addrconf_prefix_route(&addr, 64, idev->dev, 0, 0); | |
2982 | } | |
2983 | } | |
2984 | ||
1da177e4 LT |
2985 | static void addrconf_dev_config(struct net_device *dev) |
2986 | { | |
8e5e8f30 | 2987 | struct inet6_dev *idev; |
1da177e4 LT |
2988 | |
2989 | ASSERT_RTNL(); | |
2990 | ||
74235a25 HX |
2991 | if ((dev->type != ARPHRD_ETHER) && |
2992 | (dev->type != ARPHRD_FDDI) && | |
74235a25 | 2993 | (dev->type != ARPHRD_ARCNET) && |
06a4c1c5 | 2994 | (dev->type != ARPHRD_INFINIBAND) && |
cb6bf355 | 2995 | (dev->type != ARPHRD_IEEE802154) && |
e837735e | 2996 | (dev->type != ARPHRD_IEEE1394) && |
e74bccb8 JR |
2997 | (dev->type != ARPHRD_TUNNEL6) && |
2998 | (dev->type != ARPHRD_6LOWPAN)) { | |
74235a25 HX |
2999 | /* Alas, we support only Ethernet autoconfiguration. */ |
3000 | return; | |
3001 | } | |
3002 | ||
1da177e4 | 3003 | idev = addrconf_add_dev(dev); |
64e724f6 | 3004 | if (IS_ERR(idev)) |
1da177e4 LT |
3005 | return; |
3006 | ||
bc91b0f0 | 3007 | addrconf_addr_gen(idev, false); |
1da177e4 LT |
3008 | } |
3009 | ||
07a93626 | 3010 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 LT |
3011 | static void addrconf_sit_config(struct net_device *dev) |
3012 | { | |
3013 | struct inet6_dev *idev; | |
3014 | ||
3015 | ASSERT_RTNL(); | |
3016 | ||
1ab1457c YH |
3017 | /* |
3018 | * Configure the tunnel with one of our IPv4 | |
3019 | * addresses... we should configure all of | |
1da177e4 LT |
3020 | * our v4 addrs in the tunnel |
3021 | */ | |
3022 | ||
e5d08d71 | 3023 | idev = ipv6_find_idev(dev); |
63159f29 | 3024 | if (!idev) { |
91df42be | 3025 | pr_debug("%s: add_dev failed\n", __func__); |
1da177e4 LT |
3026 | return; |
3027 | } | |
3028 | ||
c7dc89c0 | 3029 | if (dev->priv_flags & IFF_ISATAP) { |
bc91b0f0 | 3030 | addrconf_addr_gen(idev, false); |
c7dc89c0 FT |
3031 | return; |
3032 | } | |
3033 | ||
1da177e4 LT |
3034 | sit_add_v4_addrs(idev); |
3035 | ||
62b54dd9 | 3036 | if (dev->flags&IFF_POINTOPOINT) |
1da177e4 | 3037 | addrconf_add_mroute(dev); |
1da177e4 | 3038 | } |
0be669bb | 3039 | #endif |
1da177e4 | 3040 | |
07a93626 | 3041 | #if IS_ENABLED(CONFIG_NET_IPGRE) |
aee80b54 | 3042 | static void addrconf_gre_config(struct net_device *dev) |
3043 | { | |
3044 | struct inet6_dev *idev; | |
aee80b54 | 3045 | |
aee80b54 | 3046 | ASSERT_RTNL(); |
3047 | ||
e5d08d71 | 3048 | idev = ipv6_find_idev(dev); |
63159f29 | 3049 | if (!idev) { |
91df42be | 3050 | pr_debug("%s: add_dev failed\n", __func__); |
aee80b54 | 3051 | return; |
3052 | } | |
3053 | ||
bc91b0f0 | 3054 | addrconf_addr_gen(idev, true); |
aee80b54 | 3055 | } |
3056 | #endif | |
3057 | ||
1ab1457c | 3058 | static int addrconf_notify(struct notifier_block *this, unsigned long event, |
351638e7 | 3059 | void *ptr) |
1da177e4 | 3060 | { |
351638e7 | 3061 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
748e2d93 | 3062 | struct inet6_dev *idev = __in6_dev_get(dev); |
c5e33bdd | 3063 | int run_pending = 0; |
b217d616 | 3064 | int err; |
1da177e4 | 3065 | |
e21e8467 | 3066 | switch (event) { |
45ba9dd2 | 3067 | case NETDEV_REGISTER: |
74235a25 | 3068 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
45ba9dd2 | 3069 | idev = ipv6_add_dev(dev); |
a317a2f1 WC |
3070 | if (IS_ERR(idev)) |
3071 | return notifier_from_errno(PTR_ERR(idev)); | |
45ba9dd2 YH |
3072 | } |
3073 | break; | |
bcdd553f | 3074 | |
1da177e4 | 3075 | case NETDEV_UP: |
3c21edbd | 3076 | case NETDEV_CHANGE: |
c2edacf8 JV |
3077 | if (dev->flags & IFF_SLAVE) |
3078 | break; | |
3079 | ||
3ce62a84 WC |
3080 | if (idev && idev->cnf.disable_ipv6) |
3081 | break; | |
3082 | ||
3c21edbd | 3083 | if (event == NETDEV_UP) { |
f24e3d65 | 3084 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd | 3085 | /* device is not ready yet. */ |
f3213831 | 3086 | pr_info("ADDRCONF(NETDEV_UP): %s: link is not ready\n", |
3c21edbd YH |
3087 | dev->name); |
3088 | break; | |
3089 | } | |
99081049 | 3090 | |
d31c7b8f EP |
3091 | if (!idev && dev->mtu >= IPV6_MIN_MTU) |
3092 | idev = ipv6_add_dev(dev); | |
3093 | ||
a317a2f1 | 3094 | if (!IS_ERR_OR_NULL(idev)) { |
99081049 | 3095 | idev->if_flags |= IF_READY; |
e3ec6cfc BT |
3096 | run_pending = 1; |
3097 | } | |
3c21edbd | 3098 | } else { |
f24e3d65 | 3099 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd YH |
3100 | /* device is still not ready. */ |
3101 | break; | |
3102 | } | |
3103 | ||
3104 | if (idev) { | |
bcdd553f | 3105 | if (idev->if_flags & IF_READY) |
3c21edbd YH |
3106 | /* device is already configured. */ |
3107 | break; | |
3c21edbd YH |
3108 | idev->if_flags |= IF_READY; |
3109 | } | |
3110 | ||
f3213831 JP |
3111 | pr_info("ADDRCONF(NETDEV_CHANGE): %s: link becomes ready\n", |
3112 | dev->name); | |
3c21edbd | 3113 | |
c5e33bdd | 3114 | run_pending = 1; |
3c21edbd YH |
3115 | } |
3116 | ||
e21e8467 | 3117 | switch (dev->type) { |
07a93626 | 3118 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 LT |
3119 | case ARPHRD_SIT: |
3120 | addrconf_sit_config(dev); | |
3121 | break; | |
aee80b54 | 3122 | #endif |
07a93626 | 3123 | #if IS_ENABLED(CONFIG_NET_IPGRE) |
aee80b54 | 3124 | case ARPHRD_IPGRE: |
3125 | addrconf_gre_config(dev); | |
3126 | break; | |
0be669bb | 3127 | #endif |
1da177e4 LT |
3128 | case ARPHRD_LOOPBACK: |
3129 | init_loopback(dev); | |
3130 | break; | |
3131 | ||
3132 | default: | |
3133 | addrconf_dev_config(dev); | |
3134 | break; | |
3ff50b79 | 3135 | } |
bcdd553f | 3136 | |
a317a2f1 | 3137 | if (!IS_ERR_OR_NULL(idev)) { |
c5e33bdd YH |
3138 | if (run_pending) |
3139 | addrconf_dad_run(idev); | |
3140 | ||
bcdd553f SH |
3141 | /* |
3142 | * If the MTU changed during the interface down, | |
3143 | * when the interface up, the changed MTU must be | |
3144 | * reflected in the idev as well as routers. | |
1da177e4 | 3145 | */ |
bcdd553f SH |
3146 | if (idev->cnf.mtu6 != dev->mtu && |
3147 | dev->mtu >= IPV6_MIN_MTU) { | |
1da177e4 LT |
3148 | rt6_mtu_change(dev, dev->mtu); |
3149 | idev->cnf.mtu6 = dev->mtu; | |
3150 | } | |
3151 | idev->tstamp = jiffies; | |
3152 | inet6_ifinfo_notify(RTM_NEWLINK, idev); | |
bcdd553f SH |
3153 | |
3154 | /* | |
3155 | * If the changed mtu during down is lower than | |
3156 | * IPV6_MIN_MTU stop IPv6 on this interface. | |
1da177e4 LT |
3157 | */ |
3158 | if (dev->mtu < IPV6_MIN_MTU) | |
bcdd553f | 3159 | addrconf_ifdown(dev, 1); |
1da177e4 LT |
3160 | } |
3161 | break; | |
3162 | ||
3163 | case NETDEV_CHANGEMTU: | |
d31c7b8f | 3164 | if (idev && dev->mtu >= IPV6_MIN_MTU) { |
1da177e4 LT |
3165 | rt6_mtu_change(dev, dev->mtu); |
3166 | idev->cnf.mtu6 = dev->mtu; | |
3167 | break; | |
3168 | } | |
3169 | ||
d31c7b8f EP |
3170 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
3171 | idev = ipv6_add_dev(dev); | |
a317a2f1 | 3172 | if (!IS_ERR(idev)) |
d31c7b8f EP |
3173 | break; |
3174 | } | |
3175 | ||
bcdd553f | 3176 | /* |
db9c7c39 | 3177 | * if MTU under IPV6_MIN_MTU. |
bcdd553f SH |
3178 | * Stop IPv6 on this interface. |
3179 | */ | |
1da177e4 LT |
3180 | |
3181 | case NETDEV_DOWN: | |
3182 | case NETDEV_UNREGISTER: | |
3183 | /* | |
3184 | * Remove all addresses from this interface. | |
3185 | */ | |
3186 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
3187 | break; | |
3c21edbd | 3188 | |
1da177e4 | 3189 | case NETDEV_CHANGENAME: |
1da177e4 | 3190 | if (idev) { |
5632c515 | 3191 | snmp6_unregister_dev(idev); |
408c4768 | 3192 | addrconf_sysctl_unregister(idev); |
a317a2f1 | 3193 | err = addrconf_sysctl_register(idev); |
b217d616 HX |
3194 | if (err) |
3195 | return notifier_from_errno(err); | |
a317a2f1 WC |
3196 | err = snmp6_register_dev(idev); |
3197 | if (err) { | |
3198 | addrconf_sysctl_unregister(idev); | |
3199 | return notifier_from_errno(err); | |
3200 | } | |
5632c515 | 3201 | } |
1da177e4 | 3202 | break; |
bcdd553f | 3203 | |
93d9b7d7 JP |
3204 | case NETDEV_PRE_TYPE_CHANGE: |
3205 | case NETDEV_POST_TYPE_CHANGE: | |
3206 | addrconf_type_change(dev, event); | |
75c78500 | 3207 | break; |
3ff50b79 | 3208 | } |
1da177e4 LT |
3209 | |
3210 | return NOTIFY_OK; | |
3211 | } | |
3212 | ||
3213 | /* | |
3214 | * addrconf module should be notified of a device going up | |
3215 | */ | |
3216 | static struct notifier_block ipv6_dev_notf = { | |
3217 | .notifier_call = addrconf_notify, | |
1da177e4 LT |
3218 | }; |
3219 | ||
93d9b7d7 | 3220 | static void addrconf_type_change(struct net_device *dev, unsigned long event) |
75c78500 MS |
3221 | { |
3222 | struct inet6_dev *idev; | |
3223 | ASSERT_RTNL(); | |
3224 | ||
3225 | idev = __in6_dev_get(dev); | |
3226 | ||
93d9b7d7 | 3227 | if (event == NETDEV_POST_TYPE_CHANGE) |
75c78500 | 3228 | ipv6_mc_remap(idev); |
93d9b7d7 | 3229 | else if (event == NETDEV_PRE_TYPE_CHANGE) |
75c78500 MS |
3230 | ipv6_mc_unmap(idev); |
3231 | } | |
3232 | ||
1da177e4 LT |
3233 | static int addrconf_ifdown(struct net_device *dev, int how) |
3234 | { | |
c346dca1 | 3235 | struct net *net = dev_net(dev); |
502a2ffd | 3236 | struct inet6_dev *idev; |
3237 | struct inet6_ifaddr *ifa; | |
73a8bd74 | 3238 | int state, i; |
1da177e4 LT |
3239 | |
3240 | ASSERT_RTNL(); | |
3241 | ||
73a8bd74 DM |
3242 | rt6_ifdown(net, dev); |
3243 | neigh_ifdown(&nd_tbl, dev); | |
1da177e4 LT |
3244 | |
3245 | idev = __in6_dev_get(dev); | |
63159f29 | 3246 | if (!idev) |
1da177e4 LT |
3247 | return -ENODEV; |
3248 | ||
bcdd553f SH |
3249 | /* |
3250 | * Step 1: remove reference to ipv6 device from parent device. | |
3251 | * Do not dev_put! | |
1da177e4 | 3252 | */ |
439e2385 | 3253 | if (how) { |
1da177e4 | 3254 | idev->dead = 1; |
8814c4b5 YH |
3255 | |
3256 | /* protected by rtnl_lock */ | |
a9b3cd7f | 3257 | RCU_INIT_POINTER(dev->ip6_ptr, NULL); |
1da177e4 LT |
3258 | |
3259 | /* Step 1.5: remove snmp6 entry */ | |
3260 | snmp6_unregister_dev(idev); | |
3261 | ||
3262 | } | |
3263 | ||
73a8bd74 DM |
3264 | /* Step 2: clear hash table */ |
3265 | for (i = 0; i < IN6_ADDR_HSIZE; i++) { | |
3266 | struct hlist_head *h = &inet6_addr_lst[i]; | |
73a8bd74 DM |
3267 | |
3268 | spin_lock_bh(&addrconf_hash_lock); | |
67ba4152 | 3269 | restart: |
b67bfe0d | 3270 | hlist_for_each_entry_rcu(ifa, h, addr_lst) { |
73a8bd74 DM |
3271 | if (ifa->idev == idev) { |
3272 | hlist_del_init_rcu(&ifa->addr_lst); | |
c15b1cca | 3273 | addrconf_del_dad_work(ifa); |
73a8bd74 DM |
3274 | goto restart; |
3275 | } | |
3276 | } | |
3277 | spin_unlock_bh(&addrconf_hash_lock); | |
3278 | } | |
3279 | ||
1da177e4 LT |
3280 | write_lock_bh(&idev->lock); |
3281 | ||
b7b1bfce HFS |
3282 | addrconf_del_rs_timer(idev); |
3283 | ||
bcdd553f | 3284 | /* Step 2: clear flags for stateless addrconf */ |
439e2385 | 3285 | if (!how) |
3c21edbd | 3286 | idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); |
1da177e4 | 3287 | |
439e2385 | 3288 | if (how && del_timer(&idev->regen_timer)) |
1da177e4 LT |
3289 | in6_dev_put(idev); |
3290 | ||
bcdd553f | 3291 | /* Step 3: clear tempaddr list */ |
372e6c8f | 3292 | while (!list_empty(&idev->tempaddr_list)) { |
3293 | ifa = list_first_entry(&idev->tempaddr_list, | |
3294 | struct inet6_ifaddr, tmp_list); | |
3295 | list_del(&ifa->tmp_list); | |
1da177e4 LT |
3296 | write_unlock_bh(&idev->lock); |
3297 | spin_lock_bh(&ifa->lock); | |
3298 | ||
3299 | if (ifa->ifpub) { | |
3300 | in6_ifa_put(ifa->ifpub); | |
3301 | ifa->ifpub = NULL; | |
3302 | } | |
3303 | spin_unlock_bh(&ifa->lock); | |
3304 | in6_ifa_put(ifa); | |
3305 | write_lock_bh(&idev->lock); | |
3306 | } | |
8f37ada5 | 3307 | |
502a2ffd | 3308 | while (!list_empty(&idev->addr_list)) { |
3309 | ifa = list_first_entry(&idev->addr_list, | |
3310 | struct inet6_ifaddr, if_list); | |
c15b1cca | 3311 | addrconf_del_dad_work(ifa); |
84e8b803 | 3312 | |
73a8bd74 | 3313 | list_del(&ifa->if_list); |
84e8b803 | 3314 | |
73a8bd74 | 3315 | write_unlock_bh(&idev->lock); |
84e8b803 | 3316 | |
8e8e676d | 3317 | spin_lock_bh(&ifa->lock); |
73a8bd74 DM |
3318 | state = ifa->state; |
3319 | ifa->state = INET6_IFADDR_STATE_DEAD; | |
8e8e676d | 3320 | spin_unlock_bh(&ifa->lock); |
9d82ca98 | 3321 | |
73a8bd74 DM |
3322 | if (state != INET6_IFADDR_STATE_DEAD) { |
3323 | __ipv6_ifa_notify(RTM_DELADDR, ifa); | |
f88c91dd | 3324 | inet6addr_notifier_call_chain(NETDEV_DOWN, ifa); |
27bdb2ab | 3325 | } |
73a8bd74 | 3326 | in6_ifa_put(ifa); |
8f37ada5 | 3327 | |
73a8bd74 DM |
3328 | write_lock_bh(&idev->lock); |
3329 | } | |
8f37ada5 | 3330 | |
1da177e4 LT |
3331 | write_unlock_bh(&idev->lock); |
3332 | ||
381f4dca SD |
3333 | /* Step 5: Discard anycast and multicast list */ |
3334 | if (how) { | |
3335 | ipv6_ac_destroy_dev(idev); | |
1da177e4 | 3336 | ipv6_mc_destroy_dev(idev); |
381f4dca | 3337 | } else { |
1da177e4 | 3338 | ipv6_mc_down(idev); |
381f4dca | 3339 | } |
1da177e4 | 3340 | |
1da177e4 | 3341 | idev->tstamp = jiffies; |
1ab1457c | 3342 | |
bcdd553f | 3343 | /* Last: Shot the device (if unregistered) */ |
439e2385 | 3344 | if (how) { |
408c4768 | 3345 | addrconf_sysctl_unregister(idev); |
1da177e4 LT |
3346 | neigh_parms_release(&nd_tbl, idev->nd_parms); |
3347 | neigh_ifdown(&nd_tbl, dev); | |
3348 | in6_dev_put(idev); | |
3349 | } | |
3350 | return 0; | |
3351 | } | |
3352 | ||
3353 | static void addrconf_rs_timer(unsigned long data) | |
3354 | { | |
b7b1bfce | 3355 | struct inet6_dev *idev = (struct inet6_dev *)data; |
caf92bc4 | 3356 | struct net_device *dev = idev->dev; |
b7b1bfce | 3357 | struct in6_addr lladdr; |
1da177e4 | 3358 | |
b7b1bfce | 3359 | write_lock(&idev->lock); |
5b2a1953 | 3360 | if (idev->dead || !(idev->if_flags & IF_READY)) |
1da177e4 LT |
3361 | goto out; |
3362 | ||
9ba2add3 | 3363 | if (!ipv6_accept_ra(idev)) |
5b2a1953 | 3364 | goto out; |
3365 | ||
3366 | /* Announcement received after solicitation was sent */ | |
3367 | if (idev->if_flags & IF_RA_RCVD) | |
1da177e4 | 3368 | goto out; |
1da177e4 | 3369 | |
b7b1bfce | 3370 | if (idev->rs_probes++ < idev->cnf.rtr_solicits) { |
caf92bc4 CW |
3371 | write_unlock(&idev->lock); |
3372 | if (!ipv6_get_lladdr(dev, &lladdr, IFA_F_TENTATIVE)) | |
3373 | ndisc_send_rs(dev, &lladdr, | |
b7b1bfce HFS |
3374 | &in6addr_linklocal_allrouters); |
3375 | else | |
caf92bc4 | 3376 | goto put; |
1da177e4 | 3377 | |
caf92bc4 | 3378 | write_lock(&idev->lock); |
b7b1bfce HFS |
3379 | /* The wait after the last probe can be shorter */ |
3380 | addrconf_mod_rs_timer(idev, (idev->rs_probes == | |
3381 | idev->cnf.rtr_solicits) ? | |
3382 | idev->cnf.rtr_solicit_delay : | |
3383 | idev->cnf.rtr_solicit_interval); | |
1da177e4 | 3384 | } else { |
1da177e4 LT |
3385 | /* |
3386 | * Note: we do not support deprecated "all on-link" | |
3387 | * assumption any longer. | |
3388 | */ | |
91df42be | 3389 | pr_debug("%s: no IPv6 routers present\n", idev->dev->name); |
1da177e4 LT |
3390 | } |
3391 | ||
3392 | out: | |
b7b1bfce | 3393 | write_unlock(&idev->lock); |
caf92bc4 | 3394 | put: |
b7b1bfce | 3395 | in6_dev_put(idev); |
1da177e4 LT |
3396 | } |
3397 | ||
3398 | /* | |
3399 | * Duplicate Address Detection | |
3400 | */ | |
3c21edbd YH |
3401 | static void addrconf_dad_kick(struct inet6_ifaddr *ifp) |
3402 | { | |
3403 | unsigned long rand_num; | |
3404 | struct inet6_dev *idev = ifp->idev; | |
3405 | ||
95c385b4 NH |
3406 | if (ifp->flags & IFA_F_OPTIMISTIC) |
3407 | rand_num = 0; | |
3408 | else | |
63862b5b | 3409 | rand_num = prandom_u32() % (idev->cnf.rtr_solicit_delay ? : 1); |
95c385b4 | 3410 | |
b7b1bfce | 3411 | ifp->dad_probes = idev->cnf.dad_transmits; |
c15b1cca | 3412 | addrconf_mod_dad_work(ifp, rand_num); |
3c21edbd YH |
3413 | } |
3414 | ||
c15b1cca | 3415 | static void addrconf_dad_begin(struct inet6_ifaddr *ifp) |
1da177e4 LT |
3416 | { |
3417 | struct inet6_dev *idev = ifp->idev; | |
3418 | struct net_device *dev = idev->dev; | |
1da177e4 LT |
3419 | |
3420 | addrconf_join_solict(dev, &ifp->addr); | |
3421 | ||
63862b5b | 3422 | prandom_seed((__force u32) ifp->addr.s6_addr32[3]); |
1da177e4 LT |
3423 | |
3424 | read_lock_bh(&idev->lock); | |
622ccdf1 | 3425 | spin_lock(&ifp->lock); |
e9d3e084 | 3426 | if (ifp->state == INET6_IFADDR_STATE_DEAD) |
1da177e4 | 3427 | goto out; |
1da177e4 LT |
3428 | |
3429 | if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || | |
1b34be74 | 3430 | idev->cnf.accept_dad < 1 || |
55ebaef1 NT |
3431 | !(ifp->flags&IFA_F_TENTATIVE) || |
3432 | ifp->flags & IFA_F_NODAD) { | |
cc411d0b | 3433 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
21809faf | 3434 | spin_unlock(&ifp->lock); |
1da177e4 LT |
3435 | read_unlock_bh(&idev->lock); |
3436 | ||
3437 | addrconf_dad_completed(ifp); | |
3438 | return; | |
3439 | } | |
3440 | ||
6732bade | 3441 | if (!(idev->if_flags & IF_READY)) { |
21809faf | 3442 | spin_unlock(&ifp->lock); |
6732bade | 3443 | read_unlock_bh(&idev->lock); |
3c21edbd | 3444 | /* |
590a9887 | 3445 | * If the device is not ready: |
3c21edbd YH |
3446 | * - keep it tentative if it is a permanent address. |
3447 | * - otherwise, kill it. | |
3448 | */ | |
3449 | in6_ifa_hold(ifp); | |
cc411d0b | 3450 | addrconf_dad_stop(ifp, 0); |
6732bade | 3451 | return; |
3c21edbd | 3452 | } |
95c385b4 NH |
3453 | |
3454 | /* | |
3455 | * Optimistic nodes can start receiving | |
3456 | * Frames right away | |
3457 | */ | |
7fd2561e | 3458 | if (ifp->flags & IFA_F_OPTIMISTIC) { |
95c385b4 | 3459 | ip6_ins_rt(ifp->rt); |
7fd2561e EK |
3460 | if (ipv6_use_optimistic_addr(idev)) { |
3461 | /* Because optimistic nodes can use this address, | |
3462 | * notify listeners. If DAD fails, RTM_DELADDR is sent. | |
3463 | */ | |
3464 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
3465 | } | |
3466 | } | |
95c385b4 | 3467 | |
6732bade | 3468 | addrconf_dad_kick(ifp); |
1da177e4 | 3469 | out: |
622ccdf1 | 3470 | spin_unlock(&ifp->lock); |
1da177e4 LT |
3471 | read_unlock_bh(&idev->lock); |
3472 | } | |
3473 | ||
c15b1cca | 3474 | static void addrconf_dad_start(struct inet6_ifaddr *ifp) |
1da177e4 | 3475 | { |
c15b1cca HFS |
3476 | bool begin_dad = false; |
3477 | ||
8e8e676d | 3478 | spin_lock_bh(&ifp->lock); |
c15b1cca HFS |
3479 | if (ifp->state != INET6_IFADDR_STATE_DEAD) { |
3480 | ifp->state = INET6_IFADDR_STATE_PREDAD; | |
3481 | begin_dad = true; | |
3482 | } | |
8e8e676d | 3483 | spin_unlock_bh(&ifp->lock); |
c15b1cca HFS |
3484 | |
3485 | if (begin_dad) | |
3486 | addrconf_mod_dad_work(ifp, 0); | |
3487 | } | |
3488 | ||
3489 | static void addrconf_dad_work(struct work_struct *w) | |
3490 | { | |
3491 | struct inet6_ifaddr *ifp = container_of(to_delayed_work(w), | |
3492 | struct inet6_ifaddr, | |
3493 | dad_work); | |
1da177e4 | 3494 | struct inet6_dev *idev = ifp->idev; |
1da177e4 LT |
3495 | struct in6_addr mcaddr; |
3496 | ||
c15b1cca HFS |
3497 | enum { |
3498 | DAD_PROCESS, | |
3499 | DAD_BEGIN, | |
3500 | DAD_ABORT, | |
3501 | } action = DAD_PROCESS; | |
3502 | ||
3503 | rtnl_lock(); | |
3504 | ||
8e8e676d | 3505 | spin_lock_bh(&ifp->lock); |
c15b1cca HFS |
3506 | if (ifp->state == INET6_IFADDR_STATE_PREDAD) { |
3507 | action = DAD_BEGIN; | |
3508 | ifp->state = INET6_IFADDR_STATE_DAD; | |
3509 | } else if (ifp->state == INET6_IFADDR_STATE_ERRDAD) { | |
3510 | action = DAD_ABORT; | |
3511 | ifp->state = INET6_IFADDR_STATE_POSTDAD; | |
3512 | } | |
8e8e676d | 3513 | spin_unlock_bh(&ifp->lock); |
c15b1cca HFS |
3514 | |
3515 | if (action == DAD_BEGIN) { | |
3516 | addrconf_dad_begin(ifp); | |
3517 | goto out; | |
3518 | } else if (action == DAD_ABORT) { | |
3519 | addrconf_dad_stop(ifp, 1); | |
3520 | goto out; | |
3521 | } | |
3522 | ||
b7b1bfce | 3523 | if (!ifp->dad_probes && addrconf_dad_end(ifp)) |
f2344a13 HX |
3524 | goto out; |
3525 | ||
c15b1cca | 3526 | write_lock_bh(&idev->lock); |
122e4519 | 3527 | if (idev->dead || !(idev->if_flags & IF_READY)) { |
c15b1cca | 3528 | write_unlock_bh(&idev->lock); |
1da177e4 LT |
3529 | goto out; |
3530 | } | |
21809faf | 3531 | |
3532 | spin_lock(&ifp->lock); | |
622ccdf1 HX |
3533 | if (ifp->state == INET6_IFADDR_STATE_DEAD) { |
3534 | spin_unlock(&ifp->lock); | |
c15b1cca | 3535 | write_unlock_bh(&idev->lock); |
622ccdf1 HX |
3536 | goto out; |
3537 | } | |
3538 | ||
b7b1bfce | 3539 | if (ifp->dad_probes == 0) { |
1da177e4 LT |
3540 | /* |
3541 | * DAD was successful | |
3542 | */ | |
3543 | ||
cc411d0b | 3544 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
21809faf | 3545 | spin_unlock(&ifp->lock); |
c15b1cca | 3546 | write_unlock_bh(&idev->lock); |
1da177e4 LT |
3547 | |
3548 | addrconf_dad_completed(ifp); | |
3549 | ||
3550 | goto out; | |
3551 | } | |
3552 | ||
b7b1bfce | 3553 | ifp->dad_probes--; |
c15b1cca HFS |
3554 | addrconf_mod_dad_work(ifp, |
3555 | NEIGH_VAR(ifp->idev->nd_parms, RETRANS_TIME)); | |
21809faf | 3556 | spin_unlock(&ifp->lock); |
c15b1cca | 3557 | write_unlock_bh(&idev->lock); |
1da177e4 LT |
3558 | |
3559 | /* send a neighbour solicitation for our addr */ | |
1da177e4 | 3560 | addrconf_addr_solict_mult(&ifp->addr, &mcaddr); |
d7aabf22 | 3561 | ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any); |
1da177e4 LT |
3562 | out: |
3563 | in6_ifa_put(ifp); | |
c15b1cca | 3564 | rtnl_unlock(); |
1da177e4 LT |
3565 | } |
3566 | ||
11ffff75 HFS |
3567 | /* ifp->idev must be at least read locked */ |
3568 | static bool ipv6_lonely_lladdr(struct inet6_ifaddr *ifp) | |
3569 | { | |
3570 | struct inet6_ifaddr *ifpiter; | |
3571 | struct inet6_dev *idev = ifp->idev; | |
3572 | ||
602582ca HFS |
3573 | list_for_each_entry_reverse(ifpiter, &idev->addr_list, if_list) { |
3574 | if (ifpiter->scope > IFA_LINK) | |
3575 | break; | |
11ffff75 HFS |
3576 | if (ifp != ifpiter && ifpiter->scope == IFA_LINK && |
3577 | (ifpiter->flags & (IFA_F_PERMANENT|IFA_F_TENTATIVE| | |
3578 | IFA_F_OPTIMISTIC|IFA_F_DADFAILED)) == | |
3579 | IFA_F_PERMANENT) | |
3580 | return false; | |
3581 | } | |
3582 | return true; | |
3583 | } | |
3584 | ||
1da177e4 LT |
3585 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp) |
3586 | { | |
e21e8467 | 3587 | struct net_device *dev = ifp->idev->dev; |
b7b1bfce | 3588 | struct in6_addr lladdr; |
b173ee48 | 3589 | bool send_rs, send_mld; |
b7b1bfce | 3590 | |
c15b1cca | 3591 | addrconf_del_dad_work(ifp); |
1da177e4 LT |
3592 | |
3593 | /* | |
3594 | * Configure the address for reception. Now it is valid. | |
3595 | */ | |
3596 | ||
3597 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
3598 | ||
026359bc TA |
3599 | /* If added prefix is link local and we are prepared to process |
3600 | router advertisements, start sending router solicitations. | |
1da177e4 LT |
3601 | */ |
3602 | ||
1ec047eb | 3603 | read_lock_bh(&ifp->idev->lock); |
11ffff75 | 3604 | send_mld = ifp->scope == IFA_LINK && ipv6_lonely_lladdr(ifp); |
b173ee48 HFS |
3605 | send_rs = send_mld && |
3606 | ipv6_accept_ra(ifp->idev) && | |
1ec047eb | 3607 | ifp->idev->cnf.rtr_solicits > 0 && |
b173ee48 | 3608 | (dev->flags&IFF_LOOPBACK) == 0; |
1ec047eb HFS |
3609 | read_unlock_bh(&ifp->idev->lock); |
3610 | ||
b173ee48 HFS |
3611 | /* While dad is in progress mld report's source address is in6_addrany. |
3612 | * Resend with proper ll now. | |
3613 | */ | |
3614 | if (send_mld) | |
3615 | ipv6_mc_dad_complete(ifp->idev); | |
3616 | ||
1ec047eb | 3617 | if (send_rs) { |
1da177e4 LT |
3618 | /* |
3619 | * If a host as already performed a random delay | |
3620 | * [...] as part of DAD [...] there is no need | |
3621 | * to delay again before sending the first RS | |
3622 | */ | |
1ec047eb | 3623 | if (ipv6_get_lladdr(dev, &lladdr, IFA_F_TENTATIVE)) |
b7b1bfce | 3624 | return; |
1ec047eb | 3625 | ndisc_send_rs(dev, &lladdr, &in6addr_linklocal_allrouters); |
1da177e4 | 3626 | |
b7b1bfce HFS |
3627 | write_lock_bh(&ifp->idev->lock); |
3628 | spin_lock(&ifp->lock); | |
3629 | ifp->idev->rs_probes = 1; | |
1da177e4 | 3630 | ifp->idev->if_flags |= IF_RS_SENT; |
b7b1bfce HFS |
3631 | addrconf_mod_rs_timer(ifp->idev, |
3632 | ifp->idev->cnf.rtr_solicit_interval); | |
3633 | spin_unlock(&ifp->lock); | |
3634 | write_unlock_bh(&ifp->idev->lock); | |
1da177e4 LT |
3635 | } |
3636 | } | |
3637 | ||
e21e8467 SH |
3638 | static void addrconf_dad_run(struct inet6_dev *idev) |
3639 | { | |
c5e33bdd YH |
3640 | struct inet6_ifaddr *ifp; |
3641 | ||
3642 | read_lock_bh(&idev->lock); | |
502a2ffd | 3643 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
21809faf | 3644 | spin_lock(&ifp->lock); |
f2344a13 HX |
3645 | if (ifp->flags & IFA_F_TENTATIVE && |
3646 | ifp->state == INET6_IFADDR_STATE_DAD) | |
3647 | addrconf_dad_kick(ifp); | |
21809faf | 3648 | spin_unlock(&ifp->lock); |
c5e33bdd YH |
3649 | } |
3650 | read_unlock_bh(&idev->lock); | |
3651 | } | |
3652 | ||
1da177e4 LT |
3653 | #ifdef CONFIG_PROC_FS |
3654 | struct if6_iter_state { | |
3c40090a | 3655 | struct seq_net_private p; |
1da177e4 | 3656 | int bucket; |
1d578303 | 3657 | int offset; |
1da177e4 LT |
3658 | }; |
3659 | ||
1d578303 | 3660 | static struct inet6_ifaddr *if6_get_first(struct seq_file *seq, loff_t pos) |
1da177e4 LT |
3661 | { |
3662 | struct inet6_ifaddr *ifa = NULL; | |
3663 | struct if6_iter_state *state = seq->private; | |
1218854a | 3664 | struct net *net = seq_file_net(seq); |
1d578303 | 3665 | int p = 0; |
1da177e4 | 3666 | |
1d578303 MM |
3667 | /* initial bucket if pos is 0 */ |
3668 | if (pos == 0) { | |
3669 | state->bucket = 0; | |
3670 | state->offset = 0; | |
3671 | } | |
3672 | ||
3673 | for (; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { | |
b67bfe0d | 3674 | hlist_for_each_entry_rcu_bh(ifa, &inet6_addr_lst[state->bucket], |
1d578303 | 3675 | addr_lst) { |
9f0d3c27 ED |
3676 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
3677 | continue; | |
1d578303 MM |
3678 | /* sync with offset */ |
3679 | if (p < state->offset) { | |
3680 | p++; | |
3681 | continue; | |
3682 | } | |
3683 | state->offset++; | |
9f0d3c27 | 3684 | return ifa; |
1d578303 MM |
3685 | } |
3686 | ||
3687 | /* prepare for next bucket */ | |
3688 | state->offset = 0; | |
3689 | p = 0; | |
1da177e4 | 3690 | } |
c2e21293 | 3691 | return NULL; |
1da177e4 LT |
3692 | } |
3693 | ||
c2e21293 | 3694 | static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, |
3695 | struct inet6_ifaddr *ifa) | |
1da177e4 LT |
3696 | { |
3697 | struct if6_iter_state *state = seq->private; | |
1218854a | 3698 | struct net *net = seq_file_net(seq); |
1da177e4 | 3699 | |
b67bfe0d | 3700 | hlist_for_each_entry_continue_rcu_bh(ifa, addr_lst) { |
9f0d3c27 ED |
3701 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
3702 | continue; | |
1d578303 | 3703 | state->offset++; |
9f0d3c27 | 3704 | return ifa; |
1d578303 | 3705 | } |
3c40090a | 3706 | |
c2e21293 | 3707 | while (++state->bucket < IN6_ADDR_HSIZE) { |
1d578303 | 3708 | state->offset = 0; |
b67bfe0d | 3709 | hlist_for_each_entry_rcu_bh(ifa, |
c2e21293 | 3710 | &inet6_addr_lst[state->bucket], addr_lst) { |
9f0d3c27 ED |
3711 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
3712 | continue; | |
1d578303 | 3713 | state->offset++; |
9f0d3c27 | 3714 | return ifa; |
c2e21293 | 3715 | } |
1da177e4 | 3716 | } |
3c40090a | 3717 | |
c2e21293 | 3718 | return NULL; |
1da177e4 LT |
3719 | } |
3720 | ||
1da177e4 | 3721 | static void *if6_seq_start(struct seq_file *seq, loff_t *pos) |
4f70ecca | 3722 | __acquires(rcu_bh) |
1da177e4 | 3723 | { |
5c578aed | 3724 | rcu_read_lock_bh(); |
1d578303 | 3725 | return if6_get_first(seq, *pos); |
1da177e4 LT |
3726 | } |
3727 | ||
3728 | static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
3729 | { | |
3730 | struct inet6_ifaddr *ifa; | |
3731 | ||
3732 | ifa = if6_get_next(seq, v); | |
3733 | ++*pos; | |
3734 | return ifa; | |
3735 | } | |
3736 | ||
3737 | static void if6_seq_stop(struct seq_file *seq, void *v) | |
4f70ecca | 3738 | __releases(rcu_bh) |
1da177e4 | 3739 | { |
5c578aed | 3740 | rcu_read_unlock_bh(); |
1da177e4 LT |
3741 | } |
3742 | ||
3743 | static int if6_seq_show(struct seq_file *seq, void *v) | |
3744 | { | |
3745 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; | |
971a351c | 3746 | seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n", |
b071195d | 3747 | &ifp->addr, |
1da177e4 LT |
3748 | ifp->idev->dev->ifindex, |
3749 | ifp->prefix_len, | |
3750 | ifp->scope, | |
971a351c | 3751 | (u8) ifp->flags, |
1da177e4 LT |
3752 | ifp->idev->dev->name); |
3753 | return 0; | |
3754 | } | |
3755 | ||
56b3d975 | 3756 | static const struct seq_operations if6_seq_ops = { |
1da177e4 LT |
3757 | .start = if6_seq_start, |
3758 | .next = if6_seq_next, | |
3759 | .show = if6_seq_show, | |
3760 | .stop = if6_seq_stop, | |
3761 | }; | |
3762 | ||
3763 | static int if6_seq_open(struct inode *inode, struct file *file) | |
3764 | { | |
3c40090a DL |
3765 | return seq_open_net(inode, file, &if6_seq_ops, |
3766 | sizeof(struct if6_iter_state)); | |
1da177e4 LT |
3767 | } |
3768 | ||
9a32144e | 3769 | static const struct file_operations if6_fops = { |
1da177e4 LT |
3770 | .owner = THIS_MODULE, |
3771 | .open = if6_seq_open, | |
3772 | .read = seq_read, | |
3773 | .llseek = seq_lseek, | |
3c40090a | 3774 | .release = seq_release_net, |
1da177e4 LT |
3775 | }; |
3776 | ||
2c8c1e72 | 3777 | static int __net_init if6_proc_net_init(struct net *net) |
1da177e4 | 3778 | { |
d4beaa66 | 3779 | if (!proc_create("if_inet6", S_IRUGO, net->proc_net, &if6_fops)) |
1da177e4 LT |
3780 | return -ENOMEM; |
3781 | return 0; | |
3782 | } | |
3783 | ||
2c8c1e72 | 3784 | static void __net_exit if6_proc_net_exit(struct net *net) |
3c40090a | 3785 | { |
ece31ffd | 3786 | remove_proc_entry("if_inet6", net->proc_net); |
3c40090a DL |
3787 | } |
3788 | ||
3789 | static struct pernet_operations if6_proc_net_ops = { | |
67ba4152 IM |
3790 | .init = if6_proc_net_init, |
3791 | .exit = if6_proc_net_exit, | |
3c40090a DL |
3792 | }; |
3793 | ||
3794 | int __init if6_proc_init(void) | |
3795 | { | |
3796 | return register_pernet_subsys(&if6_proc_net_ops); | |
3797 | } | |
3798 | ||
1da177e4 LT |
3799 | void if6_proc_exit(void) |
3800 | { | |
3c40090a | 3801 | unregister_pernet_subsys(&if6_proc_net_ops); |
1da177e4 LT |
3802 | } |
3803 | #endif /* CONFIG_PROC_FS */ | |
3804 | ||
07a93626 | 3805 | #if IS_ENABLED(CONFIG_IPV6_MIP6) |
3b9f9a1c | 3806 | /* Check if address is a home address configured on any interface. */ |
b71d1d42 | 3807 | int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr) |
3b9f9a1c NT |
3808 | { |
3809 | int ret = 0; | |
c2e21293 | 3810 | struct inet6_ifaddr *ifp = NULL; |
ddbe5032 | 3811 | unsigned int hash = inet6_addr_hash(addr); |
c2e21293 | 3812 | |
5c578aed | 3813 | rcu_read_lock_bh(); |
b67bfe0d | 3814 | hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 3815 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
389f6612 | 3816 | continue; |
caad295f | 3817 | if (ipv6_addr_equal(&ifp->addr, addr) && |
3b9f9a1c NT |
3818 | (ifp->flags & IFA_F_HOMEADDRESS)) { |
3819 | ret = 1; | |
3820 | break; | |
3821 | } | |
3822 | } | |
5c578aed | 3823 | rcu_read_unlock_bh(); |
3b9f9a1c NT |
3824 | return ret; |
3825 | } | |
3826 | #endif | |
3827 | ||
1da177e4 LT |
3828 | /* |
3829 | * Periodic address status verification | |
3830 | */ | |
3831 | ||
c15b1cca | 3832 | static void addrconf_verify_rtnl(void) |
1da177e4 | 3833 | { |
b2db7564 | 3834 | unsigned long now, next, next_sec, next_sched; |
1da177e4 | 3835 | struct inet6_ifaddr *ifp; |
1da177e4 LT |
3836 | int i; |
3837 | ||
c15b1cca HFS |
3838 | ASSERT_RTNL(); |
3839 | ||
5c578aed | 3840 | rcu_read_lock_bh(); |
1da177e4 | 3841 | now = jiffies; |
b2db7564 | 3842 | next = round_jiffies_up(now + ADDR_CHECK_FREQUENCY); |
1da177e4 | 3843 | |
c15b1cca | 3844 | cancel_delayed_work(&addr_chk_work); |
1da177e4 | 3845 | |
bcdd553f | 3846 | for (i = 0; i < IN6_ADDR_HSIZE; i++) { |
1da177e4 | 3847 | restart: |
c15b1cca | 3848 | hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[i], addr_lst) { |
1da177e4 | 3849 | unsigned long age; |
1da177e4 | 3850 | |
fad8da3e YA |
3851 | /* When setting preferred_lft to a value not zero or |
3852 | * infinity, while valid_lft is infinity | |
3853 | * IFA_F_PERMANENT has a non-infinity life time. | |
3854 | */ | |
3855 | if ((ifp->flags & IFA_F_PERMANENT) && | |
3856 | (ifp->prefered_lft == INFINITY_LIFE_TIME)) | |
1da177e4 LT |
3857 | continue; |
3858 | ||
3859 | spin_lock(&ifp->lock); | |
b2db7564 YH |
3860 | /* We try to batch several events at once. */ |
3861 | age = (now - ifp->tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ; | |
1da177e4 | 3862 | |
8f27ebb9 YH |
3863 | if (ifp->valid_lft != INFINITY_LIFE_TIME && |
3864 | age >= ifp->valid_lft) { | |
1da177e4 LT |
3865 | spin_unlock(&ifp->lock); |
3866 | in6_ifa_hold(ifp); | |
1da177e4 LT |
3867 | ipv6_del_addr(ifp); |
3868 | goto restart; | |
8f27ebb9 YH |
3869 | } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { |
3870 | spin_unlock(&ifp->lock); | |
3871 | continue; | |
1da177e4 | 3872 | } else if (age >= ifp->prefered_lft) { |
a1ed0526 | 3873 | /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */ |
1da177e4 LT |
3874 | int deprecate = 0; |
3875 | ||
3876 | if (!(ifp->flags&IFA_F_DEPRECATED)) { | |
3877 | deprecate = 1; | |
3878 | ifp->flags |= IFA_F_DEPRECATED; | |
3879 | } | |
3880 | ||
fad8da3e YA |
3881 | if ((ifp->valid_lft != INFINITY_LIFE_TIME) && |
3882 | (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))) | |
1da177e4 LT |
3883 | next = ifp->tstamp + ifp->valid_lft * HZ; |
3884 | ||
3885 | spin_unlock(&ifp->lock); | |
3886 | ||
3887 | if (deprecate) { | |
3888 | in6_ifa_hold(ifp); | |
1da177e4 LT |
3889 | |
3890 | ipv6_ifa_notify(0, ifp); | |
3891 | in6_ifa_put(ifp); | |
3892 | goto restart; | |
3893 | } | |
1da177e4 LT |
3894 | } else if ((ifp->flags&IFA_F_TEMPORARY) && |
3895 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
88949cf4 | 3896 | unsigned long regen_advance = ifp->idev->cnf.regen_max_retry * |
3897 | ifp->idev->cnf.dad_transmits * | |
1f9248e5 | 3898 | NEIGH_VAR(ifp->idev->nd_parms, RETRANS_TIME) / HZ; |
88949cf4 | 3899 | |
1da177e4 LT |
3900 | if (age >= ifp->prefered_lft - regen_advance) { |
3901 | struct inet6_ifaddr *ifpub = ifp->ifpub; | |
3902 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
3903 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
3904 | if (!ifp->regen_count && ifpub) { | |
3905 | ifp->regen_count++; | |
3906 | in6_ifa_hold(ifp); | |
3907 | in6_ifa_hold(ifpub); | |
3908 | spin_unlock(&ifp->lock); | |
5c578aed | 3909 | |
291d809b HY |
3910 | spin_lock(&ifpub->lock); |
3911 | ifpub->regen_count = 0; | |
3912 | spin_unlock(&ifpub->lock); | |
1da177e4 LT |
3913 | ipv6_create_tempaddr(ifpub, ifp); |
3914 | in6_ifa_put(ifpub); | |
3915 | in6_ifa_put(ifp); | |
3916 | goto restart; | |
3917 | } | |
3918 | } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) | |
3919 | next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; | |
3920 | spin_unlock(&ifp->lock); | |
1da177e4 LT |
3921 | } else { |
3922 | /* ifp->prefered_lft <= ifp->valid_lft */ | |
3923 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
3924 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
3925 | spin_unlock(&ifp->lock); | |
3926 | } | |
3927 | } | |
1da177e4 LT |
3928 | } |
3929 | ||
b2db7564 YH |
3930 | next_sec = round_jiffies_up(next); |
3931 | next_sched = next; | |
3932 | ||
3933 | /* If rounded timeout is accurate enough, accept it. */ | |
3934 | if (time_before(next_sec, next + ADDRCONF_TIMER_FUZZ)) | |
3935 | next_sched = next_sec; | |
3936 | ||
3937 | /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */ | |
3938 | if (time_before(next_sched, jiffies + ADDRCONF_TIMER_FUZZ_MAX)) | |
3939 | next_sched = jiffies + ADDRCONF_TIMER_FUZZ_MAX; | |
3940 | ||
ba3542e1 | 3941 | ADBG(KERN_DEBUG "now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n", |
3942 | now, next, next_sec, next_sched); | |
c15b1cca | 3943 | mod_delayed_work(addrconf_wq, &addr_chk_work, next_sched - now); |
5c578aed | 3944 | rcu_read_unlock_bh(); |
1da177e4 LT |
3945 | } |
3946 | ||
c15b1cca HFS |
3947 | static void addrconf_verify_work(struct work_struct *w) |
3948 | { | |
3949 | rtnl_lock(); | |
3950 | addrconf_verify_rtnl(); | |
3951 | rtnl_unlock(); | |
3952 | } | |
3953 | ||
3954 | static void addrconf_verify(void) | |
3955 | { | |
3956 | mod_delayed_work(addrconf_wq, &addr_chk_work, 0); | |
3957 | } | |
3958 | ||
caeaba79 ND |
3959 | static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local, |
3960 | struct in6_addr **peer_pfx) | |
461d8837 TG |
3961 | { |
3962 | struct in6_addr *pfx = NULL; | |
3963 | ||
caeaba79 ND |
3964 | *peer_pfx = NULL; |
3965 | ||
461d8837 TG |
3966 | if (addr) |
3967 | pfx = nla_data(addr); | |
3968 | ||
3969 | if (local) { | |
3970 | if (pfx && nla_memcmp(local, pfx, sizeof(*pfx))) | |
caeaba79 ND |
3971 | *peer_pfx = pfx; |
3972 | pfx = nla_data(local); | |
461d8837 TG |
3973 | } |
3974 | ||
3975 | return pfx; | |
3976 | } | |
3977 | ||
ef7c79ed | 3978 | static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = { |
461d8837 TG |
3979 | [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, |
3980 | [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, | |
3981 | [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, | |
479840ff | 3982 | [IFA_FLAGS] = { .len = sizeof(u32) }, |
461d8837 TG |
3983 | }; |
3984 | ||
1da177e4 | 3985 | static int |
661d2967 | 3986 | inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 3987 | { |
3b1e0a65 | 3988 | struct net *net = sock_net(skb->sk); |
b933f716 TG |
3989 | struct ifaddrmsg *ifm; |
3990 | struct nlattr *tb[IFA_MAX+1]; | |
caeaba79 | 3991 | struct in6_addr *pfx, *peer_pfx; |
6046d5b4 | 3992 | u32 ifa_flags; |
b933f716 | 3993 | int err; |
1da177e4 | 3994 | |
b933f716 TG |
3995 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
3996 | if (err < 0) | |
3997 | return err; | |
3998 | ||
3999 | ifm = nlmsg_data(nlh); | |
caeaba79 | 4000 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer_pfx); |
63159f29 | 4001 | if (!pfx) |
1da177e4 LT |
4002 | return -EINVAL; |
4003 | ||
6046d5b4 HK |
4004 | ifa_flags = tb[IFA_FLAGS] ? nla_get_u32(tb[IFA_FLAGS]) : ifm->ifa_flags; |
4005 | ||
4006 | /* We ignore other flags so far. */ | |
4007 | ifa_flags &= IFA_F_MANAGETEMPADDR; | |
4008 | ||
4009 | return inet6_addr_del(net, ifm->ifa_index, ifa_flags, pfx, | |
4010 | ifm->ifa_prefixlen); | |
1da177e4 LT |
4011 | } |
4012 | ||
479840ff | 4013 | static int inet6_addr_modify(struct inet6_ifaddr *ifp, u32 ifa_flags, |
55ebaef1 | 4014 | u32 prefered_lft, u32 valid_lft) |
081bba5b | 4015 | { |
6f704992 YH |
4016 | u32 flags; |
4017 | clock_t expires; | |
4bed72e4 | 4018 | unsigned long timeout; |
53bd6749 | 4019 | bool was_managetempaddr; |
5b84efec | 4020 | bool had_prefixroute; |
46d48046 | 4021 | |
c15b1cca HFS |
4022 | ASSERT_RTNL(); |
4023 | ||
081bba5b NT |
4024 | if (!valid_lft || (prefered_lft > valid_lft)) |
4025 | return -EINVAL; | |
4026 | ||
53bd6749 JP |
4027 | if (ifa_flags & IFA_F_MANAGETEMPADDR && |
4028 | (ifp->flags & IFA_F_TEMPORARY || ifp->prefix_len != 64)) | |
4029 | return -EINVAL; | |
4030 | ||
4bed72e4 YH |
4031 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
4032 | if (addrconf_finite_timeout(timeout)) { | |
4033 | expires = jiffies_to_clock_t(timeout * HZ); | |
4034 | valid_lft = timeout; | |
6f704992 | 4035 | flags = RTF_EXPIRES; |
4bed72e4 YH |
4036 | } else { |
4037 | expires = 0; | |
4038 | flags = 0; | |
4039 | ifa_flags |= IFA_F_PERMANENT; | |
6f704992 | 4040 | } |
081bba5b | 4041 | |
4bed72e4 YH |
4042 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
4043 | if (addrconf_finite_timeout(timeout)) { | |
4044 | if (timeout == 0) | |
4045 | ifa_flags |= IFA_F_DEPRECATED; | |
4046 | prefered_lft = timeout; | |
4047 | } | |
081bba5b NT |
4048 | |
4049 | spin_lock_bh(&ifp->lock); | |
53bd6749 | 4050 | was_managetempaddr = ifp->flags & IFA_F_MANAGETEMPADDR; |
5b84efec TH |
4051 | had_prefixroute = ifp->flags & IFA_F_PERMANENT && |
4052 | !(ifp->flags & IFA_F_NOPREFIXROUTE); | |
53bd6749 | 4053 | ifp->flags &= ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | |
761aac73 TH |
4054 | IFA_F_HOMEADDRESS | IFA_F_MANAGETEMPADDR | |
4055 | IFA_F_NOPREFIXROUTE); | |
53bd6749 | 4056 | ifp->flags |= ifa_flags; |
081bba5b NT |
4057 | ifp->tstamp = jiffies; |
4058 | ifp->valid_lft = valid_lft; | |
4059 | ifp->prefered_lft = prefered_lft; | |
4060 | ||
4061 | spin_unlock_bh(&ifp->lock); | |
4062 | if (!(ifp->flags&IFA_F_TENTATIVE)) | |
4063 | ipv6_ifa_notify(0, ifp); | |
081bba5b | 4064 | |
761aac73 TH |
4065 | if (!(ifa_flags & IFA_F_NOPREFIXROUTE)) { |
4066 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev, | |
4067 | expires, flags); | |
5b84efec TH |
4068 | } else if (had_prefixroute) { |
4069 | enum cleanup_prefix_rt_t action; | |
4070 | unsigned long rt_expires; | |
4071 | ||
4072 | write_lock_bh(&ifp->idev->lock); | |
4073 | action = check_cleanup_prefix_route(ifp, &rt_expires); | |
4074 | write_unlock_bh(&ifp->idev->lock); | |
4075 | ||
4076 | if (action != CLEANUP_PREFIX_RT_NOP) { | |
4077 | cleanup_prefix_route(ifp, rt_expires, | |
4078 | action == CLEANUP_PREFIX_RT_DEL); | |
4079 | } | |
761aac73 | 4080 | } |
53bd6749 JP |
4081 | |
4082 | if (was_managetempaddr || ifp->flags & IFA_F_MANAGETEMPADDR) { | |
4083 | if (was_managetempaddr && !(ifp->flags & IFA_F_MANAGETEMPADDR)) | |
4084 | valid_lft = prefered_lft = 0; | |
4085 | manage_tempaddrs(ifp->idev, ifp, valid_lft, prefered_lft, | |
4086 | !was_managetempaddr, jiffies); | |
4087 | } | |
4088 | ||
c15b1cca | 4089 | addrconf_verify_rtnl(); |
081bba5b NT |
4090 | |
4091 | return 0; | |
4092 | } | |
4093 | ||
1da177e4 | 4094 | static int |
661d2967 | 4095 | inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 4096 | { |
3b1e0a65 | 4097 | struct net *net = sock_net(skb->sk); |
461d8837 TG |
4098 | struct ifaddrmsg *ifm; |
4099 | struct nlattr *tb[IFA_MAX+1]; | |
caeaba79 | 4100 | struct in6_addr *pfx, *peer_pfx; |
7198f8ce TG |
4101 | struct inet6_ifaddr *ifa; |
4102 | struct net_device *dev; | |
55ebaef1 | 4103 | u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; |
479840ff | 4104 | u32 ifa_flags; |
461d8837 | 4105 | int err; |
1da177e4 | 4106 | |
461d8837 TG |
4107 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
4108 | if (err < 0) | |
4109 | return err; | |
4110 | ||
4111 | ifm = nlmsg_data(nlh); | |
caeaba79 | 4112 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer_pfx); |
63159f29 | 4113 | if (!pfx) |
1da177e4 LT |
4114 | return -EINVAL; |
4115 | ||
461d8837 | 4116 | if (tb[IFA_CACHEINFO]) { |
0778769d | 4117 | struct ifa_cacheinfo *ci; |
461d8837 TG |
4118 | |
4119 | ci = nla_data(tb[IFA_CACHEINFO]); | |
0778769d | 4120 | valid_lft = ci->ifa_valid; |
461d8837 TG |
4121 | preferred_lft = ci->ifa_prefered; |
4122 | } else { | |
4123 | preferred_lft = INFINITY_LIFE_TIME; | |
4124 | valid_lft = INFINITY_LIFE_TIME; | |
0778769d NT |
4125 | } |
4126 | ||
af284937 | 4127 | dev = __dev_get_by_index(net, ifm->ifa_index); |
63159f29 | 4128 | if (!dev) |
7198f8ce TG |
4129 | return -ENODEV; |
4130 | ||
479840ff JP |
4131 | ifa_flags = tb[IFA_FLAGS] ? nla_get_u32(tb[IFA_FLAGS]) : ifm->ifa_flags; |
4132 | ||
55ebaef1 | 4133 | /* We ignore other flags so far. */ |
761aac73 | 4134 | ifa_flags &= IFA_F_NODAD | IFA_F_HOMEADDRESS | IFA_F_MANAGETEMPADDR | |
93a714d6 | 4135 | IFA_F_NOPREFIXROUTE | IFA_F_MCAUTOJOIN; |
55ebaef1 | 4136 | |
1cab3da6 | 4137 | ifa = ipv6_get_ifaddr(net, pfx, dev, 1); |
63159f29 | 4138 | if (!ifa) { |
7198f8ce TG |
4139 | /* |
4140 | * It would be best to check for !NLM_F_CREATE here but | |
db9c7c39 | 4141 | * userspace already relies on not having to provide this. |
7198f8ce | 4142 | */ |
caeaba79 | 4143 | return inet6_addr_add(net, ifm->ifa_index, pfx, peer_pfx, |
af284937 DL |
4144 | ifm->ifa_prefixlen, ifa_flags, |
4145 | preferred_lft, valid_lft); | |
081bba5b NT |
4146 | } |
4147 | ||
7198f8ce TG |
4148 | if (nlh->nlmsg_flags & NLM_F_EXCL || |
4149 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) | |
4150 | err = -EEXIST; | |
4151 | else | |
55ebaef1 | 4152 | err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft); |
7198f8ce TG |
4153 | |
4154 | in6_ifa_put(ifa); | |
4155 | ||
4156 | return err; | |
1da177e4 LT |
4157 | } |
4158 | ||
479840ff | 4159 | static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u32 flags, |
101bb229 TG |
4160 | u8 scope, int ifindex) |
4161 | { | |
4162 | struct ifaddrmsg *ifm; | |
4163 | ||
4164 | ifm = nlmsg_data(nlh); | |
4165 | ifm->ifa_family = AF_INET6; | |
4166 | ifm->ifa_prefixlen = prefixlen; | |
4167 | ifm->ifa_flags = flags; | |
4168 | ifm->ifa_scope = scope; | |
4169 | ifm->ifa_index = ifindex; | |
4170 | } | |
4171 | ||
85486af0 TG |
4172 | static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, |
4173 | unsigned long tstamp, u32 preferred, u32 valid) | |
4174 | { | |
4175 | struct ifa_cacheinfo ci; | |
4176 | ||
18a31e1e TG |
4177 | ci.cstamp = cstamp_delta(cstamp); |
4178 | ci.tstamp = cstamp_delta(tstamp); | |
85486af0 TG |
4179 | ci.ifa_prefered = preferred; |
4180 | ci.ifa_valid = valid; | |
4181 | ||
4182 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
4183 | } | |
4184 | ||
101bb229 TG |
4185 | static inline int rt_scope(int ifa_scope) |
4186 | { | |
4187 | if (ifa_scope & IFA_HOST) | |
4188 | return RT_SCOPE_HOST; | |
4189 | else if (ifa_scope & IFA_LINK) | |
4190 | return RT_SCOPE_LINK; | |
4191 | else if (ifa_scope & IFA_SITE) | |
4192 | return RT_SCOPE_SITE; | |
4193 | else | |
4194 | return RT_SCOPE_UNIVERSE; | |
4195 | } | |
4196 | ||
0ab6803b TG |
4197 | static inline int inet6_ifaddr_msgsize(void) |
4198 | { | |
339bf98f | 4199 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
caeaba79 | 4200 | + nla_total_size(16) /* IFA_LOCAL */ |
339bf98f | 4201 | + nla_total_size(16) /* IFA_ADDRESS */ |
479840ff JP |
4202 | + nla_total_size(sizeof(struct ifa_cacheinfo)) |
4203 | + nla_total_size(4) /* IFA_FLAGS */; | |
0ab6803b | 4204 | } |
c5396a31 | 4205 | |
1da177e4 | 4206 | static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, |
15e47304 | 4207 | u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4 | 4208 | { |
1da177e4 | 4209 | struct nlmsghdr *nlh; |
85486af0 | 4210 | u32 preferred, valid; |
1da177e4 | 4211 | |
15e47304 | 4212 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
63159f29 | 4213 | if (!nlh) |
26932566 | 4214 | return -EMSGSIZE; |
0ab6803b | 4215 | |
101bb229 TG |
4216 | put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), |
4217 | ifa->idev->dev->ifindex); | |
4218 | ||
fad8da3e YA |
4219 | if (!((ifa->flags&IFA_F_PERMANENT) && |
4220 | (ifa->prefered_lft == INFINITY_LIFE_TIME))) { | |
85486af0 TG |
4221 | preferred = ifa->prefered_lft; |
4222 | valid = ifa->valid_lft; | |
4223 | if (preferred != INFINITY_LIFE_TIME) { | |
1da177e4 | 4224 | long tval = (jiffies - ifa->tstamp)/HZ; |
a1faa698 JR |
4225 | if (preferred > tval) |
4226 | preferred -= tval; | |
4227 | else | |
4228 | preferred = 0; | |
f56619fc BH |
4229 | if (valid != INFINITY_LIFE_TIME) { |
4230 | if (valid > tval) | |
4231 | valid -= tval; | |
4232 | else | |
4233 | valid = 0; | |
4234 | } | |
1da177e4 LT |
4235 | } |
4236 | } else { | |
85486af0 TG |
4237 | preferred = INFINITY_LIFE_TIME; |
4238 | valid = INFINITY_LIFE_TIME; | |
4239 | } | |
4240 | ||
7996c799 | 4241 | if (!ipv6_addr_any(&ifa->peer_addr)) { |
930345ea JB |
4242 | if (nla_put_in6_addr(skb, IFA_LOCAL, &ifa->addr) < 0 || |
4243 | nla_put_in6_addr(skb, IFA_ADDRESS, &ifa->peer_addr) < 0) | |
caeaba79 ND |
4244 | goto error; |
4245 | } else | |
930345ea | 4246 | if (nla_put_in6_addr(skb, IFA_ADDRESS, &ifa->addr) < 0) |
caeaba79 ND |
4247 | goto error; |
4248 | ||
4249 | if (put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) | |
4250 | goto error; | |
1da177e4 | 4251 | |
479840ff JP |
4252 | if (nla_put_u32(skb, IFA_FLAGS, ifa->flags) < 0) |
4253 | goto error; | |
4254 | ||
053c095a JB |
4255 | nlmsg_end(skb, nlh); |
4256 | return 0; | |
caeaba79 ND |
4257 | |
4258 | error: | |
4259 | nlmsg_cancel(skb, nlh); | |
4260 | return -EMSGSIZE; | |
1da177e4 LT |
4261 | } |
4262 | ||
4263 | static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, | |
15e47304 | 4264 | u32 portid, u32 seq, int event, u16 flags) |
1da177e4 | 4265 | { |
1da177e4 | 4266 | struct nlmsghdr *nlh; |
101bb229 TG |
4267 | u8 scope = RT_SCOPE_UNIVERSE; |
4268 | int ifindex = ifmca->idev->dev->ifindex; | |
4269 | ||
4270 | if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE) | |
4271 | scope = RT_SCOPE_SITE; | |
1da177e4 | 4272 | |
15e47304 | 4273 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
63159f29 | 4274 | if (!nlh) |
26932566 | 4275 | return -EMSGSIZE; |
85486af0 | 4276 | |
0ab6803b | 4277 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
930345ea | 4278 | if (nla_put_in6_addr(skb, IFA_MULTICAST, &ifmca->mca_addr) < 0 || |
0ab6803b | 4279 | put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp, |
26932566 PM |
4280 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
4281 | nlmsg_cancel(skb, nlh); | |
4282 | return -EMSGSIZE; | |
4283 | } | |
85486af0 | 4284 | |
053c095a JB |
4285 | nlmsg_end(skb, nlh); |
4286 | return 0; | |
1da177e4 LT |
4287 | } |
4288 | ||
4289 | static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, | |
15e47304 | 4290 | u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4 | 4291 | { |
1da177e4 | 4292 | struct nlmsghdr *nlh; |
101bb229 TG |
4293 | u8 scope = RT_SCOPE_UNIVERSE; |
4294 | int ifindex = ifaca->aca_idev->dev->ifindex; | |
4295 | ||
4296 | if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) | |
4297 | scope = RT_SCOPE_SITE; | |
1da177e4 | 4298 | |
15e47304 | 4299 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
63159f29 | 4300 | if (!nlh) |
26932566 | 4301 | return -EMSGSIZE; |
85486af0 | 4302 | |
0ab6803b | 4303 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
930345ea | 4304 | if (nla_put_in6_addr(skb, IFA_ANYCAST, &ifaca->aca_addr) < 0 || |
0ab6803b | 4305 | put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp, |
26932566 PM |
4306 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
4307 | nlmsg_cancel(skb, nlh); | |
4308 | return -EMSGSIZE; | |
4309 | } | |
1da177e4 | 4310 | |
053c095a JB |
4311 | nlmsg_end(skb, nlh); |
4312 | return 0; | |
1da177e4 LT |
4313 | } |
4314 | ||
e21e8467 | 4315 | enum addr_type_t { |
1da177e4 LT |
4316 | UNICAST_ADDR, |
4317 | MULTICAST_ADDR, | |
4318 | ANYCAST_ADDR, | |
4319 | }; | |
4320 | ||
234b27c3 ED |
4321 | /* called with rcu_read_lock() */ |
4322 | static int in6_dump_addrs(struct inet6_dev *idev, struct sk_buff *skb, | |
4323 | struct netlink_callback *cb, enum addr_type_t type, | |
4324 | int s_ip_idx, int *p_ip_idx) | |
4325 | { | |
234b27c3 ED |
4326 | struct ifmcaddr6 *ifmca; |
4327 | struct ifacaddr6 *ifaca; | |
4328 | int err = 1; | |
4329 | int ip_idx = *p_ip_idx; | |
4330 | ||
4331 | read_lock_bh(&idev->lock); | |
4332 | switch (type) { | |
502a2ffd | 4333 | case UNICAST_ADDR: { |
4334 | struct inet6_ifaddr *ifa; | |
4335 | ||
234b27c3 | 4336 | /* unicast address incl. temp addr */ |
502a2ffd | 4337 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
4338 | if (++ip_idx < s_ip_idx) | |
234b27c3 ED |
4339 | continue; |
4340 | err = inet6_fill_ifaddr(skb, ifa, | |
15e47304 | 4341 | NETLINK_CB(cb->skb).portid, |
234b27c3 ED |
4342 | cb->nlh->nlmsg_seq, |
4343 | RTM_NEWADDR, | |
4344 | NLM_F_MULTI); | |
053c095a | 4345 | if (err < 0) |
234b27c3 | 4346 | break; |
63998ac2 | 4347 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
234b27c3 ED |
4348 | } |
4349 | break; | |
502a2ffd | 4350 | } |
234b27c3 ED |
4351 | case MULTICAST_ADDR: |
4352 | /* multicast address */ | |
4353 | for (ifmca = idev->mc_list; ifmca; | |
4354 | ifmca = ifmca->next, ip_idx++) { | |
4355 | if (ip_idx < s_ip_idx) | |
4356 | continue; | |
4357 | err = inet6_fill_ifmcaddr(skb, ifmca, | |
15e47304 | 4358 | NETLINK_CB(cb->skb).portid, |
234b27c3 ED |
4359 | cb->nlh->nlmsg_seq, |
4360 | RTM_GETMULTICAST, | |
4361 | NLM_F_MULTI); | |
053c095a | 4362 | if (err < 0) |
234b27c3 ED |
4363 | break; |
4364 | } | |
4365 | break; | |
4366 | case ANYCAST_ADDR: | |
4367 | /* anycast address */ | |
4368 | for (ifaca = idev->ac_list; ifaca; | |
4369 | ifaca = ifaca->aca_next, ip_idx++) { | |
4370 | if (ip_idx < s_ip_idx) | |
4371 | continue; | |
4372 | err = inet6_fill_ifacaddr(skb, ifaca, | |
15e47304 | 4373 | NETLINK_CB(cb->skb).portid, |
234b27c3 ED |
4374 | cb->nlh->nlmsg_seq, |
4375 | RTM_GETANYCAST, | |
4376 | NLM_F_MULTI); | |
053c095a | 4377 | if (err < 0) |
234b27c3 ED |
4378 | break; |
4379 | } | |
4380 | break; | |
4381 | default: | |
4382 | break; | |
4383 | } | |
4384 | read_unlock_bh(&idev->lock); | |
4385 | *p_ip_idx = ip_idx; | |
4386 | return err; | |
4387 | } | |
4388 | ||
1da177e4 LT |
4389 | static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, |
4390 | enum addr_type_t type) | |
4391 | { | |
234b27c3 ED |
4392 | struct net *net = sock_net(skb->sk); |
4393 | int h, s_h; | |
1da177e4 LT |
4394 | int idx, ip_idx; |
4395 | int s_idx, s_ip_idx; | |
1da177e4 | 4396 | struct net_device *dev; |
234b27c3 ED |
4397 | struct inet6_dev *idev; |
4398 | struct hlist_head *head; | |
1ab1457c | 4399 | |
234b27c3 ED |
4400 | s_h = cb->args[0]; |
4401 | s_idx = idx = cb->args[1]; | |
4402 | s_ip_idx = ip_idx = cb->args[2]; | |
5d5619b4 | 4403 | |
234b27c3 | 4404 | rcu_read_lock(); |
63998ac2 | 4405 | cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^ net->dev_base_seq; |
234b27c3 ED |
4406 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { |
4407 | idx = 0; | |
4408 | head = &net->dev_index_head[h]; | |
b67bfe0d | 4409 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
234b27c3 ED |
4410 | if (idx < s_idx) |
4411 | goto cont; | |
4b97efdf | 4412 | if (h > s_h || idx > s_idx) |
234b27c3 ED |
4413 | s_ip_idx = 0; |
4414 | ip_idx = 0; | |
e21e8467 SH |
4415 | idev = __in6_dev_get(dev); |
4416 | if (!idev) | |
234b27c3 ED |
4417 | goto cont; |
4418 | ||
4419 | if (in6_dump_addrs(idev, skb, cb, type, | |
7b46a644 | 4420 | s_ip_idx, &ip_idx) < 0) |
234b27c3 | 4421 | goto done; |
7562f876 | 4422 | cont: |
234b27c3 ED |
4423 | idx++; |
4424 | } | |
1da177e4 | 4425 | } |
234b27c3 ED |
4426 | done: |
4427 | rcu_read_unlock(); | |
4428 | cb->args[0] = h; | |
4429 | cb->args[1] = idx; | |
4430 | cb->args[2] = ip_idx; | |
4431 | ||
1da177e4 LT |
4432 | return skb->len; |
4433 | } | |
4434 | ||
4435 | static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
4436 | { | |
4437 | enum addr_type_t type = UNICAST_ADDR; | |
b854272b | 4438 | |
1da177e4 LT |
4439 | return inet6_dump_addr(skb, cb, type); |
4440 | } | |
4441 | ||
4442 | static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
4443 | { | |
4444 | enum addr_type_t type = MULTICAST_ADDR; | |
b854272b | 4445 | |
1da177e4 LT |
4446 | return inet6_dump_addr(skb, cb, type); |
4447 | } | |
4448 | ||
4449 | ||
4450 | static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
4451 | { | |
4452 | enum addr_type_t type = ANYCAST_ADDR; | |
b854272b | 4453 | |
1da177e4 LT |
4454 | return inet6_dump_addr(skb, cb, type); |
4455 | } | |
4456 | ||
661d2967 | 4457 | static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr *nlh) |
6c223828 | 4458 | { |
3b1e0a65 | 4459 | struct net *net = sock_net(in_skb->sk); |
1b29fc2c TG |
4460 | struct ifaddrmsg *ifm; |
4461 | struct nlattr *tb[IFA_MAX+1]; | |
caeaba79 | 4462 | struct in6_addr *addr = NULL, *peer; |
6c223828 NT |
4463 | struct net_device *dev = NULL; |
4464 | struct inet6_ifaddr *ifa; | |
4465 | struct sk_buff *skb; | |
6c223828 NT |
4466 | int err; |
4467 | ||
1b29fc2c TG |
4468 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
4469 | if (err < 0) | |
4470 | goto errout; | |
4471 | ||
caeaba79 | 4472 | addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer); |
63159f29 | 4473 | if (!addr) { |
1b29fc2c TG |
4474 | err = -EINVAL; |
4475 | goto errout; | |
6c223828 | 4476 | } |
6c223828 | 4477 | |
1b29fc2c | 4478 | ifm = nlmsg_data(nlh); |
6c223828 | 4479 | if (ifm->ifa_index) |
6fda7350 | 4480 | dev = __dev_get_by_index(net, ifm->ifa_index); |
6c223828 | 4481 | |
e21e8467 SH |
4482 | ifa = ipv6_get_ifaddr(net, addr, dev, 1); |
4483 | if (!ifa) { | |
1b29fc2c TG |
4484 | err = -EADDRNOTAVAIL; |
4485 | goto errout; | |
4486 | } | |
6c223828 | 4487 | |
e21e8467 SH |
4488 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL); |
4489 | if (!skb) { | |
6c223828 | 4490 | err = -ENOBUFS; |
1b29fc2c | 4491 | goto errout_ifa; |
6c223828 NT |
4492 | } |
4493 | ||
15e47304 | 4494 | err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).portid, |
6c223828 | 4495 | nlh->nlmsg_seq, RTM_NEWADDR, 0); |
26932566 PM |
4496 | if (err < 0) { |
4497 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
4498 | WARN_ON(err == -EMSGSIZE); | |
4499 | kfree_skb(skb); | |
4500 | goto errout_ifa; | |
4501 | } | |
15e47304 | 4502 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); |
1b29fc2c | 4503 | errout_ifa: |
6c223828 | 4504 | in6_ifa_put(ifa); |
1b29fc2c | 4505 | errout: |
6c223828 | 4506 | return err; |
6c223828 NT |
4507 | } |
4508 | ||
1da177e4 LT |
4509 | static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) |
4510 | { | |
4511 | struct sk_buff *skb; | |
c346dca1 | 4512 | struct net *net = dev_net(ifa->idev->dev); |
5d620266 | 4513 | int err = -ENOBUFS; |
1da177e4 | 4514 | |
0ab6803b | 4515 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); |
63159f29 | 4516 | if (!skb) |
5d620266 TG |
4517 | goto errout; |
4518 | ||
4519 | err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0); | |
26932566 PM |
4520 | if (err < 0) { |
4521 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
4522 | WARN_ON(err == -EMSGSIZE); | |
4523 | kfree_skb(skb); | |
4524 | goto errout; | |
4525 | } | |
1ce85fe4 PNA |
4526 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
4527 | return; | |
5d620266 TG |
4528 | errout: |
4529 | if (err < 0) | |
6fda7350 | 4530 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); |
1da177e4 LT |
4531 | } |
4532 | ||
b6f99a21 | 4533 | static inline void ipv6_store_devconf(struct ipv6_devconf *cnf, |
1da177e4 LT |
4534 | __s32 *array, int bytes) |
4535 | { | |
04561c1f TG |
4536 | BUG_ON(bytes < (DEVCONF_MAX * 4)); |
4537 | ||
1da177e4 LT |
4538 | memset(array, 0, bytes); |
4539 | array[DEVCONF_FORWARDING] = cnf->forwarding; | |
4540 | array[DEVCONF_HOPLIMIT] = cnf->hop_limit; | |
4541 | array[DEVCONF_MTU6] = cnf->mtu6; | |
4542 | array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; | |
4543 | array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; | |
4544 | array[DEVCONF_AUTOCONF] = cnf->autoconf; | |
4545 | array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; | |
4546 | array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; | |
93908d19 TG |
4547 | array[DEVCONF_RTR_SOLICIT_INTERVAL] = |
4548 | jiffies_to_msecs(cnf->rtr_solicit_interval); | |
4549 | array[DEVCONF_RTR_SOLICIT_DELAY] = | |
4550 | jiffies_to_msecs(cnf->rtr_solicit_delay); | |
1da177e4 | 4551 | array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; |
fc4eba58 HFS |
4552 | array[DEVCONF_MLDV1_UNSOLICITED_REPORT_INTERVAL] = |
4553 | jiffies_to_msecs(cnf->mldv1_unsolicited_report_interval); | |
4554 | array[DEVCONF_MLDV2_UNSOLICITED_REPORT_INTERVAL] = | |
4555 | jiffies_to_msecs(cnf->mldv2_unsolicited_report_interval); | |
1da177e4 LT |
4556 | array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; |
4557 | array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; | |
4558 | array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; | |
4559 | array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; | |
4560 | array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; | |
1da177e4 | 4561 | array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; |
65f5c7c1 | 4562 | array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; |
c4fd30eb | 4563 | array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; |
930d6ff2 YH |
4564 | #ifdef CONFIG_IPV6_ROUTER_PREF |
4565 | array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; | |
93908d19 TG |
4566 | array[DEVCONF_RTR_PROBE_INTERVAL] = |
4567 | jiffies_to_msecs(cnf->rtr_probe_interval); | |
fa03ef38 | 4568 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 YH |
4569 | array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; |
4570 | #endif | |
930d6ff2 | 4571 | #endif |
fbea49e1 | 4572 | array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp; |
0bcbc926 | 4573 | array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route; |
95c385b4 NH |
4574 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
4575 | array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad; | |
7fd2561e | 4576 | array[DEVCONF_USE_OPTIMISTIC] = cnf->use_optimistic; |
95c385b4 | 4577 | #endif |
7bc570c8 YH |
4578 | #ifdef CONFIG_IPV6_MROUTE |
4579 | array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding; | |
4580 | #endif | |
778d80be | 4581 | array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6; |
1b34be74 | 4582 | array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad; |
c3faca05 | 4583 | array[DEVCONF_FORCE_TLLAO] = cnf->force_tllao; |
5cb04436 | 4584 | array[DEVCONF_NDISC_NOTIFY] = cnf->ndisc_notify; |
b800c3b9 | 4585 | array[DEVCONF_SUPPRESS_FRAG_NDISC] = cnf->suppress_frag_ndisc; |
d9333196 | 4586 | array[DEVCONF_ACCEPT_RA_FROM_LOCAL] = cnf->accept_ra_from_local; |
c2943f14 | 4587 | array[DEVCONF_ACCEPT_RA_MTU] = cnf->accept_ra_mtu; |
3d1bec99 | 4588 | /* we omit DEVCONF_STABLE_SECRET for now */ |
1da177e4 LT |
4589 | } |
4590 | ||
b382b191 TG |
4591 | static inline size_t inet6_ifla6_size(void) |
4592 | { | |
4593 | return nla_total_size(4) /* IFLA_INET6_FLAGS */ | |
4594 | + nla_total_size(sizeof(struct ifla_cacheinfo)) | |
4595 | + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */ | |
4596 | + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */ | |
f53adae4 DB |
4597 | + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */ |
4598 | + nla_total_size(sizeof(struct in6_addr)); /* IFLA_INET6_TOKEN */ | |
b382b191 TG |
4599 | } |
4600 | ||
339bf98f TG |
4601 | static inline size_t inet6_if_nlmsg_size(void) |
4602 | { | |
4603 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
4604 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
4605 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ | |
4606 | + nla_total_size(4) /* IFLA_MTU */ | |
4607 | + nla_total_size(4) /* IFLA_LINK */ | |
b382b191 | 4608 | + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */ |
339bf98f | 4609 | } |
c5396a31 | 4610 | |
be281e55 | 4611 | static inline void __snmp6_fill_statsdev(u64 *stats, atomic_long_t *mib, |
7d720c3e | 4612 | int items, int bytes) |
7f7d9a6b HX |
4613 | { |
4614 | int i; | |
4615 | int pad = bytes - sizeof(u64) * items; | |
4616 | BUG_ON(pad < 0); | |
4617 | ||
4618 | /* Use put_unaligned() because stats may not be aligned for u64. */ | |
4619 | put_unaligned(items, &stats[0]); | |
4620 | for (i = 1; i < items; i++) | |
be281e55 | 4621 | put_unaligned(atomic_long_read(&mib[i]), &stats[i]); |
7f7d9a6b HX |
4622 | |
4623 | memset(&stats[items], 0, pad); | |
4624 | } | |
4625 | ||
698365fa | 4626 | static inline void __snmp6_fill_stats64(u64 *stats, void __percpu *mib, |
4ce3c183 ED |
4627 | int items, int bytes, size_t syncpoff) |
4628 | { | |
4629 | int i; | |
4630 | int pad = bytes - sizeof(u64) * items; | |
4631 | BUG_ON(pad < 0); | |
4632 | ||
4633 | /* Use put_unaligned() because stats may not be aligned for u64. */ | |
4634 | put_unaligned(items, &stats[0]); | |
4635 | for (i = 1; i < items; i++) | |
4636 | put_unaligned(snmp_fold_field64(mib, i, syncpoff), &stats[i]); | |
4637 | ||
4638 | memset(&stats[items], 0, pad); | |
4639 | } | |
4640 | ||
7f7d9a6b HX |
4641 | static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype, |
4642 | int bytes) | |
4643 | { | |
e21e8467 | 4644 | switch (attrtype) { |
7f7d9a6b | 4645 | case IFLA_INET6_STATS: |
698365fa | 4646 | __snmp6_fill_stats64(stats, idev->stats.ipv6, |
4ce3c183 | 4647 | IPSTATS_MIB_MAX, bytes, offsetof(struct ipstats_mib, syncp)); |
7f7d9a6b HX |
4648 | break; |
4649 | case IFLA_INET6_ICMP6STATS: | |
be281e55 | 4650 | __snmp6_fill_statsdev(stats, idev->stats.icmpv6dev->mibs, ICMP6_MIB_MAX, bytes); |
7f7d9a6b HX |
4651 | break; |
4652 | } | |
4653 | } | |
4654 | ||
b382b191 TG |
4655 | static int inet6_fill_ifla6_attrs(struct sk_buff *skb, struct inet6_dev *idev) |
4656 | { | |
4657 | struct nlattr *nla; | |
4658 | struct ifla_cacheinfo ci; | |
4659 | ||
c78679e8 DM |
4660 | if (nla_put_u32(skb, IFLA_INET6_FLAGS, idev->if_flags)) |
4661 | goto nla_put_failure; | |
b382b191 | 4662 | ci.max_reasm_len = IPV6_MAXPLEN; |
24912420 DM |
4663 | ci.tstamp = cstamp_delta(idev->tstamp); |
4664 | ci.reachable_time = jiffies_to_msecs(idev->nd_parms->reachable_time); | |
1f9248e5 | 4665 | ci.retrans_time = jiffies_to_msecs(NEIGH_VAR(idev->nd_parms, RETRANS_TIME)); |
c78679e8 DM |
4666 | if (nla_put(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci)) |
4667 | goto nla_put_failure; | |
b382b191 | 4668 | nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32)); |
63159f29 | 4669 | if (!nla) |
b382b191 TG |
4670 | goto nla_put_failure; |
4671 | ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla)); | |
4672 | ||
4673 | /* XXX - MC not implemented */ | |
4674 | ||
4675 | nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64)); | |
63159f29 | 4676 | if (!nla) |
b382b191 TG |
4677 | goto nla_put_failure; |
4678 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla)); | |
4679 | ||
4680 | nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64)); | |
63159f29 | 4681 | if (!nla) |
b382b191 TG |
4682 | goto nla_put_failure; |
4683 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla)); | |
4684 | ||
f53adae4 | 4685 | nla = nla_reserve(skb, IFLA_INET6_TOKEN, sizeof(struct in6_addr)); |
63159f29 | 4686 | if (!nla) |
f53adae4 | 4687 | goto nla_put_failure; |
bc91b0f0 JP |
4688 | |
4689 | if (nla_put_u8(skb, IFLA_INET6_ADDR_GEN_MODE, idev->addr_gen_mode)) | |
4690 | goto nla_put_failure; | |
4691 | ||
f53adae4 DB |
4692 | read_lock_bh(&idev->lock); |
4693 | memcpy(nla_data(nla), idev->token.s6_addr, nla_len(nla)); | |
4694 | read_unlock_bh(&idev->lock); | |
4695 | ||
b382b191 TG |
4696 | return 0; |
4697 | ||
4698 | nla_put_failure: | |
4699 | return -EMSGSIZE; | |
4700 | } | |
4701 | ||
4702 | static size_t inet6_get_link_af_size(const struct net_device *dev) | |
4703 | { | |
4704 | if (!__in6_dev_get(dev)) | |
4705 | return 0; | |
4706 | ||
4707 | return inet6_ifla6_size(); | |
4708 | } | |
4709 | ||
4710 | static int inet6_fill_link_af(struct sk_buff *skb, const struct net_device *dev) | |
4711 | { | |
4712 | struct inet6_dev *idev = __in6_dev_get(dev); | |
4713 | ||
4714 | if (!idev) | |
4715 | return -ENODATA; | |
4716 | ||
4717 | if (inet6_fill_ifla6_attrs(skb, idev) < 0) | |
4718 | return -EMSGSIZE; | |
4719 | ||
4720 | return 0; | |
4721 | } | |
4722 | ||
f53adae4 DB |
4723 | static int inet6_set_iftoken(struct inet6_dev *idev, struct in6_addr *token) |
4724 | { | |
f53adae4 DB |
4725 | struct inet6_ifaddr *ifp; |
4726 | struct net_device *dev = idev->dev; | |
fc403832 | 4727 | bool update_rs = false; |
dc848292 | 4728 | struct in6_addr ll_addr; |
f53adae4 | 4729 | |
c15b1cca HFS |
4730 | ASSERT_RTNL(); |
4731 | ||
63159f29 | 4732 | if (!token) |
f53adae4 DB |
4733 | return -EINVAL; |
4734 | if (ipv6_addr_any(token)) | |
4735 | return -EINVAL; | |
4736 | if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) | |
4737 | return -EINVAL; | |
f53adae4 DB |
4738 | if (!ipv6_accept_ra(idev)) |
4739 | return -EINVAL; | |
4740 | if (idev->cnf.rtr_solicits <= 0) | |
4741 | return -EINVAL; | |
4742 | ||
4743 | write_lock_bh(&idev->lock); | |
4744 | ||
4745 | BUILD_BUG_ON(sizeof(token->s6_addr) != 16); | |
4746 | memcpy(idev->token.s6_addr + 8, token->s6_addr + 8, 8); | |
4747 | ||
4748 | write_unlock_bh(&idev->lock); | |
4749 | ||
dc848292 HFS |
4750 | if (!idev->dead && (idev->if_flags & IF_READY) && |
4751 | !ipv6_get_lladdr(dev, &ll_addr, IFA_F_TENTATIVE | | |
4752 | IFA_F_OPTIMISTIC)) { | |
fc403832 DB |
4753 | |
4754 | /* If we're not ready, then normal ifup will take care | |
4755 | * of this. Otherwise, we need to request our rs here. | |
4756 | */ | |
4757 | ndisc_send_rs(dev, &ll_addr, &in6addr_linklocal_allrouters); | |
4758 | update_rs = true; | |
4759 | } | |
f53adae4 DB |
4760 | |
4761 | write_lock_bh(&idev->lock); | |
fc403832 | 4762 | |
77ecaace | 4763 | if (update_rs) { |
fc403832 | 4764 | idev->if_flags |= IF_RS_SENT; |
77ecaace HFS |
4765 | idev->rs_probes = 1; |
4766 | addrconf_mod_rs_timer(idev, idev->cnf.rtr_solicit_interval); | |
4767 | } | |
f53adae4 DB |
4768 | |
4769 | /* Well, that's kinda nasty ... */ | |
4770 | list_for_each_entry(ifp, &idev->addr_list, if_list) { | |
4771 | spin_lock(&ifp->lock); | |
617fe29d | 4772 | if (ifp->tokenized) { |
f53adae4 DB |
4773 | ifp->valid_lft = 0; |
4774 | ifp->prefered_lft = 0; | |
4775 | } | |
4776 | spin_unlock(&ifp->lock); | |
4777 | } | |
4778 | ||
4779 | write_unlock_bh(&idev->lock); | |
b2ed64a9 | 4780 | inet6_ifinfo_notify(RTM_NEWLINK, idev); |
c15b1cca | 4781 | addrconf_verify_rtnl(); |
f53adae4 DB |
4782 | return 0; |
4783 | } | |
4784 | ||
11b1f828 DB |
4785 | static const struct nla_policy inet6_af_policy[IFLA_INET6_MAX + 1] = { |
4786 | [IFLA_INET6_ADDR_GEN_MODE] = { .type = NLA_U8 }, | |
4787 | [IFLA_INET6_TOKEN] = { .len = sizeof(struct in6_addr) }, | |
4788 | }; | |
4789 | ||
4790 | static int inet6_validate_link_af(const struct net_device *dev, | |
4791 | const struct nlattr *nla) | |
4792 | { | |
4793 | struct nlattr *tb[IFLA_INET6_MAX + 1]; | |
4794 | ||
4795 | if (dev && !__in6_dev_get(dev)) | |
4796 | return -EAFNOSUPPORT; | |
4797 | ||
4798 | return nla_parse_nested(tb, IFLA_INET6_MAX, nla, inet6_af_policy); | |
4799 | } | |
4800 | ||
f53adae4 DB |
4801 | static int inet6_set_link_af(struct net_device *dev, const struct nlattr *nla) |
4802 | { | |
4803 | int err = -EINVAL; | |
4804 | struct inet6_dev *idev = __in6_dev_get(dev); | |
4805 | struct nlattr *tb[IFLA_INET6_MAX + 1]; | |
4806 | ||
4807 | if (!idev) | |
4808 | return -EAFNOSUPPORT; | |
4809 | ||
4810 | if (nla_parse_nested(tb, IFLA_INET6_MAX, nla, NULL) < 0) | |
4811 | BUG(); | |
4812 | ||
bc91b0f0 | 4813 | if (tb[IFLA_INET6_TOKEN]) { |
f53adae4 | 4814 | err = inet6_set_iftoken(idev, nla_data(tb[IFLA_INET6_TOKEN])); |
bc91b0f0 JP |
4815 | if (err) |
4816 | return err; | |
4817 | } | |
4818 | ||
4819 | if (tb[IFLA_INET6_ADDR_GEN_MODE]) { | |
4820 | u8 mode = nla_get_u8(tb[IFLA_INET6_ADDR_GEN_MODE]); | |
4821 | ||
4822 | if (mode != IN6_ADDR_GEN_MODE_EUI64 && | |
622c81d5 HFS |
4823 | mode != IN6_ADDR_GEN_MODE_NONE && |
4824 | mode != IN6_ADDR_GEN_MODE_STABLE_PRIVACY) | |
4825 | return -EINVAL; | |
4826 | ||
4827 | if (mode == IN6_ADDR_GEN_MODE_STABLE_PRIVACY && | |
4828 | !idev->cnf.stable_secret.initialized && | |
4829 | !dev_net(dev)->ipv6.devconf_dflt->stable_secret.initialized) | |
bc91b0f0 | 4830 | return -EINVAL; |
622c81d5 | 4831 | |
bc91b0f0 JP |
4832 | idev->addr_gen_mode = mode; |
4833 | err = 0; | |
4834 | } | |
f53adae4 DB |
4835 | |
4836 | return err; | |
4837 | } | |
4838 | ||
1ab1457c | 4839 | static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, |
15e47304 | 4840 | u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4 | 4841 | { |
04561c1f | 4842 | struct net_device *dev = idev->dev; |
04561c1f TG |
4843 | struct ifinfomsg *hdr; |
4844 | struct nlmsghdr *nlh; | |
4845 | void *protoinfo; | |
04561c1f | 4846 | |
15e47304 | 4847 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*hdr), flags); |
63159f29 | 4848 | if (!nlh) |
26932566 | 4849 | return -EMSGSIZE; |
04561c1f TG |
4850 | |
4851 | hdr = nlmsg_data(nlh); | |
4852 | hdr->ifi_family = AF_INET6; | |
4853 | hdr->__ifi_pad = 0; | |
4854 | hdr->ifi_type = dev->type; | |
4855 | hdr->ifi_index = dev->ifindex; | |
4856 | hdr->ifi_flags = dev_get_flags(dev); | |
4857 | hdr->ifi_change = 0; | |
4858 | ||
c78679e8 DM |
4859 | if (nla_put_string(skb, IFLA_IFNAME, dev->name) || |
4860 | (dev->addr_len && | |
4861 | nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || | |
4862 | nla_put_u32(skb, IFLA_MTU, dev->mtu) || | |
a54acb3a ND |
4863 | (dev->ifindex != dev_get_iflink(dev) && |
4864 | nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev)))) | |
c78679e8 | 4865 | goto nla_put_failure; |
04561c1f | 4866 | protoinfo = nla_nest_start(skb, IFLA_PROTINFO); |
63159f29 | 4867 | if (!protoinfo) |
04561c1f | 4868 | goto nla_put_failure; |
1da177e4 | 4869 | |
b382b191 | 4870 | if (inet6_fill_ifla6_attrs(skb, idev) < 0) |
bf99f1bd | 4871 | goto nla_put_failure; |
1da177e4 | 4872 | |
04561c1f | 4873 | nla_nest_end(skb, protoinfo); |
053c095a JB |
4874 | nlmsg_end(skb, nlh); |
4875 | return 0; | |
1da177e4 | 4876 | |
04561c1f | 4877 | nla_put_failure: |
26932566 PM |
4878 | nlmsg_cancel(skb, nlh); |
4879 | return -EMSGSIZE; | |
1da177e4 LT |
4880 | } |
4881 | ||
4882 | static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) | |
4883 | { | |
3b1e0a65 | 4884 | struct net *net = sock_net(skb->sk); |
84d2697d | 4885 | int h, s_h; |
434a8a58 | 4886 | int idx = 0, s_idx; |
1da177e4 LT |
4887 | struct net_device *dev; |
4888 | struct inet6_dev *idev; | |
84d2697d | 4889 | struct hlist_head *head; |
1da177e4 | 4890 | |
84d2697d ED |
4891 | s_h = cb->args[0]; |
4892 | s_idx = cb->args[1]; | |
4893 | ||
4894 | rcu_read_lock(); | |
4895 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
4896 | idx = 0; | |
4897 | head = &net->dev_index_head[h]; | |
b67bfe0d | 4898 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
84d2697d ED |
4899 | if (idx < s_idx) |
4900 | goto cont; | |
4901 | idev = __in6_dev_get(dev); | |
4902 | if (!idev) | |
4903 | goto cont; | |
4904 | if (inet6_fill_ifinfo(skb, idev, | |
15e47304 | 4905 | NETLINK_CB(cb->skb).portid, |
84d2697d | 4906 | cb->nlh->nlmsg_seq, |
053c095a | 4907 | RTM_NEWLINK, NLM_F_MULTI) < 0) |
84d2697d | 4908 | goto out; |
7562f876 | 4909 | cont: |
84d2697d ED |
4910 | idx++; |
4911 | } | |
1da177e4 | 4912 | } |
84d2697d ED |
4913 | out: |
4914 | rcu_read_unlock(); | |
4915 | cb->args[1] = idx; | |
4916 | cb->args[0] = h; | |
1da177e4 LT |
4917 | |
4918 | return skb->len; | |
4919 | } | |
4920 | ||
4921 | void inet6_ifinfo_notify(int event, struct inet6_dev *idev) | |
4922 | { | |
4923 | struct sk_buff *skb; | |
c346dca1 | 4924 | struct net *net = dev_net(idev->dev); |
8d7a76c9 | 4925 | int err = -ENOBUFS; |
1ab1457c | 4926 | |
339bf98f | 4927 | skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC); |
63159f29 | 4928 | if (!skb) |
8d7a76c9 TG |
4929 | goto errout; |
4930 | ||
4931 | err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); | |
26932566 PM |
4932 | if (err < 0) { |
4933 | /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */ | |
4934 | WARN_ON(err == -EMSGSIZE); | |
4935 | kfree_skb(skb); | |
4936 | goto errout; | |
4937 | } | |
5f75a104 | 4938 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFINFO, NULL, GFP_ATOMIC); |
1ce85fe4 | 4939 | return; |
8d7a76c9 TG |
4940 | errout: |
4941 | if (err < 0) | |
5f75a104 | 4942 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFINFO, err); |
1da177e4 LT |
4943 | } |
4944 | ||
339bf98f TG |
4945 | static inline size_t inet6_prefix_nlmsg_size(void) |
4946 | { | |
4947 | return NLMSG_ALIGN(sizeof(struct prefixmsg)) | |
4948 | + nla_total_size(sizeof(struct in6_addr)) | |
4949 | + nla_total_size(sizeof(struct prefix_cacheinfo)); | |
4950 | } | |
c5396a31 | 4951 | |
1da177e4 | 4952 | static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, |
15e47304 | 4953 | struct prefix_info *pinfo, u32 portid, u32 seq, |
6051e2f4 | 4954 | int event, unsigned int flags) |
1da177e4 | 4955 | { |
6051e2f4 TG |
4956 | struct prefixmsg *pmsg; |
4957 | struct nlmsghdr *nlh; | |
1da177e4 LT |
4958 | struct prefix_cacheinfo ci; |
4959 | ||
15e47304 | 4960 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*pmsg), flags); |
63159f29 | 4961 | if (!nlh) |
26932566 | 4962 | return -EMSGSIZE; |
6051e2f4 TG |
4963 | |
4964 | pmsg = nlmsg_data(nlh); | |
1da177e4 | 4965 | pmsg->prefix_family = AF_INET6; |
8a47077a PM |
4966 | pmsg->prefix_pad1 = 0; |
4967 | pmsg->prefix_pad2 = 0; | |
1da177e4 LT |
4968 | pmsg->prefix_ifindex = idev->dev->ifindex; |
4969 | pmsg->prefix_len = pinfo->prefix_len; | |
4970 | pmsg->prefix_type = pinfo->type; | |
8a47077a | 4971 | pmsg->prefix_pad3 = 0; |
1da177e4 LT |
4972 | pmsg->prefix_flags = 0; |
4973 | if (pinfo->onlink) | |
4974 | pmsg->prefix_flags |= IF_PREFIX_ONLINK; | |
4975 | if (pinfo->autoconf) | |
4976 | pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; | |
4977 | ||
c78679e8 DM |
4978 | if (nla_put(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix)) |
4979 | goto nla_put_failure; | |
1da177e4 LT |
4980 | ci.preferred_time = ntohl(pinfo->prefered); |
4981 | ci.valid_time = ntohl(pinfo->valid); | |
c78679e8 DM |
4982 | if (nla_put(skb, PREFIX_CACHEINFO, sizeof(ci), &ci)) |
4983 | goto nla_put_failure; | |
053c095a JB |
4984 | nlmsg_end(skb, nlh); |
4985 | return 0; | |
1da177e4 | 4986 | |
6051e2f4 | 4987 | nla_put_failure: |
26932566 PM |
4988 | nlmsg_cancel(skb, nlh); |
4989 | return -EMSGSIZE; | |
1da177e4 LT |
4990 | } |
4991 | ||
1ab1457c | 4992 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 LT |
4993 | struct prefix_info *pinfo) |
4994 | { | |
4995 | struct sk_buff *skb; | |
c346dca1 | 4996 | struct net *net = dev_net(idev->dev); |
8c384bfa | 4997 | int err = -ENOBUFS; |
1da177e4 | 4998 | |
339bf98f | 4999 | skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC); |
63159f29 | 5000 | if (!skb) |
8c384bfa TG |
5001 | goto errout; |
5002 | ||
5003 | err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); | |
26932566 PM |
5004 | if (err < 0) { |
5005 | /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */ | |
5006 | WARN_ON(err == -EMSGSIZE); | |
5007 | kfree_skb(skb); | |
5008 | goto errout; | |
5009 | } | |
1ce85fe4 PNA |
5010 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); |
5011 | return; | |
8c384bfa TG |
5012 | errout: |
5013 | if (err < 0) | |
6fda7350 | 5014 | rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err); |
1da177e4 LT |
5015 | } |
5016 | ||
1da177e4 LT |
5017 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) |
5018 | { | |
63998ac2 ND |
5019 | struct net *net = dev_net(ifp->idev->dev); |
5020 | ||
c15b1cca HFS |
5021 | if (event) |
5022 | ASSERT_RTNL(); | |
5023 | ||
1da177e4 LT |
5024 | inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); |
5025 | ||
5026 | switch (event) { | |
5027 | case RTM_NEWADDR: | |
95c385b4 NH |
5028 | /* |
5029 | * If the address was optimistic | |
5030 | * we inserted the route at the start of | |
5031 | * our DAD process, so we don't need | |
5032 | * to do it again | |
5033 | */ | |
5034 | if (!(ifp->rt->rt6i_node)) | |
5035 | ip6_ins_rt(ifp->rt); | |
1da177e4 LT |
5036 | if (ifp->idev->cnf.forwarding) |
5037 | addrconf_join_anycast(ifp); | |
7996c799 | 5038 | if (!ipv6_addr_any(&ifp->peer_addr)) |
caeaba79 ND |
5039 | addrconf_prefix_route(&ifp->peer_addr, 128, |
5040 | ifp->idev->dev, 0, 0); | |
1da177e4 LT |
5041 | break; |
5042 | case RTM_DELADDR: | |
5043 | if (ifp->idev->cnf.forwarding) | |
5044 | addrconf_leave_anycast(ifp); | |
5045 | addrconf_leave_solict(ifp->idev, &ifp->addr); | |
7996c799 | 5046 | if (!ipv6_addr_any(&ifp->peer_addr)) { |
caeaba79 | 5047 | struct rt6_info *rt; |
caeaba79 | 5048 | |
e7478dfc ND |
5049 | rt = addrconf_get_prefix_route(&ifp->peer_addr, 128, |
5050 | ifp->idev->dev, 0, 0); | |
f24062b0 ND |
5051 | if (rt && ip6_del_rt(rt)) |
5052 | dst_free(&rt->dst); | |
caeaba79 | 5053 | } |
d8d1f30b | 5054 | dst_hold(&ifp->rt->dst); |
93fa159a | 5055 | |
73a8bd74 | 5056 | if (ip6_del_rt(ifp->rt)) |
d8d1f30b | 5057 | dst_free(&ifp->rt->dst); |
705f1c86 HFS |
5058 | |
5059 | rt_genid_bump_ipv6(net); | |
1da177e4 LT |
5060 | break; |
5061 | } | |
63998ac2 | 5062 | atomic_inc(&net->ipv6.dev_addr_genid); |
1da177e4 LT |
5063 | } |
5064 | ||
5065 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) | |
5066 | { | |
8814c4b5 | 5067 | rcu_read_lock_bh(); |
1da177e4 LT |
5068 | if (likely(ifp->idev->dead == 0)) |
5069 | __ipv6_ifa_notify(event, ifp); | |
8814c4b5 | 5070 | rcu_read_unlock_bh(); |
1da177e4 LT |
5071 | } |
5072 | ||
5073 | #ifdef CONFIG_SYSCTL | |
5074 | ||
5075 | static | |
fe2c6338 | 5076 | int addrconf_sysctl_forward(struct ctl_table *ctl, int write, |
1da177e4 LT |
5077 | void __user *buffer, size_t *lenp, loff_t *ppos) |
5078 | { | |
5079 | int *valp = ctl->data; | |
5080 | int val = *valp; | |
88af182e | 5081 | loff_t pos = *ppos; |
fe2c6338 | 5082 | struct ctl_table lctl; |
1da177e4 LT |
5083 | int ret; |
5084 | ||
013d97e9 FR |
5085 | /* |
5086 | * ctl->data points to idev->cnf.forwarding, we should | |
5087 | * not modify it until we get the rtnl lock. | |
5088 | */ | |
5089 | lctl = *ctl; | |
5090 | lctl.data = &val; | |
5091 | ||
5092 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); | |
1da177e4 | 5093 | |
c8fecf22 | 5094 | if (write) |
b325fddb | 5095 | ret = addrconf_fixup_forwarding(ctl, valp, val); |
88af182e EB |
5096 | if (ret) |
5097 | *ppos = pos; | |
1ab1457c | 5098 | return ret; |
1da177e4 LT |
5099 | } |
5100 | ||
77751427 ML |
5101 | static |
5102 | int addrconf_sysctl_mtu(struct ctl_table *ctl, int write, | |
5103 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
5104 | { | |
5105 | struct inet6_dev *idev = ctl->extra1; | |
5106 | int min_mtu = IPV6_MIN_MTU; | |
5107 | struct ctl_table lctl; | |
5108 | ||
5109 | lctl = *ctl; | |
5110 | lctl.extra1 = &min_mtu; | |
5111 | lctl.extra2 = idev ? &idev->dev->mtu : NULL; | |
5112 | ||
5113 | return proc_dointvec_minmax(&lctl, write, buffer, lenp, ppos); | |
5114 | } | |
5115 | ||
56d417b1 BH |
5116 | static void dev_disable_change(struct inet6_dev *idev) |
5117 | { | |
75538c2b CW |
5118 | struct netdev_notifier_info info; |
5119 | ||
56d417b1 BH |
5120 | if (!idev || !idev->dev) |
5121 | return; | |
5122 | ||
75538c2b | 5123 | netdev_notifier_info_init(&info, idev->dev); |
56d417b1 | 5124 | if (idev->cnf.disable_ipv6) |
75538c2b | 5125 | addrconf_notify(NULL, NETDEV_DOWN, &info); |
56d417b1 | 5126 | else |
75538c2b | 5127 | addrconf_notify(NULL, NETDEV_UP, &info); |
56d417b1 BH |
5128 | } |
5129 | ||
5130 | static void addrconf_disable_change(struct net *net, __s32 newf) | |
5131 | { | |
5132 | struct net_device *dev; | |
5133 | struct inet6_dev *idev; | |
5134 | ||
c6d14c84 ED |
5135 | rcu_read_lock(); |
5136 | for_each_netdev_rcu(net, dev) { | |
56d417b1 BH |
5137 | idev = __in6_dev_get(dev); |
5138 | if (idev) { | |
5139 | int changed = (!idev->cnf.disable_ipv6) ^ (!newf); | |
5140 | idev->cnf.disable_ipv6 = newf; | |
5141 | if (changed) | |
5142 | dev_disable_change(idev); | |
5143 | } | |
56d417b1 | 5144 | } |
c6d14c84 | 5145 | rcu_read_unlock(); |
56d417b1 BH |
5146 | } |
5147 | ||
013d97e9 | 5148 | static int addrconf_disable_ipv6(struct ctl_table *table, int *p, int newf) |
56d417b1 BH |
5149 | { |
5150 | struct net *net; | |
013d97e9 FR |
5151 | int old; |
5152 | ||
5153 | if (!rtnl_trylock()) | |
5154 | return restart_syscall(); | |
56d417b1 BH |
5155 | |
5156 | net = (struct net *)table->extra2; | |
013d97e9 FR |
5157 | old = *p; |
5158 | *p = newf; | |
56d417b1 | 5159 | |
013d97e9 FR |
5160 | if (p == &net->ipv6.devconf_dflt->disable_ipv6) { |
5161 | rtnl_unlock(); | |
56d417b1 | 5162 | return 0; |
88af182e | 5163 | } |
56d417b1 BH |
5164 | |
5165 | if (p == &net->ipv6.devconf_all->disable_ipv6) { | |
56d417b1 BH |
5166 | net->ipv6.devconf_dflt->disable_ipv6 = newf; |
5167 | addrconf_disable_change(net, newf); | |
013d97e9 | 5168 | } else if ((!newf) ^ (!old)) |
56d417b1 BH |
5169 | dev_disable_change((struct inet6_dev *)table->extra1); |
5170 | ||
5171 | rtnl_unlock(); | |
5172 | return 0; | |
5173 | } | |
5174 | ||
5175 | static | |
fe2c6338 | 5176 | int addrconf_sysctl_disable(struct ctl_table *ctl, int write, |
56d417b1 BH |
5177 | void __user *buffer, size_t *lenp, loff_t *ppos) |
5178 | { | |
5179 | int *valp = ctl->data; | |
5180 | int val = *valp; | |
88af182e | 5181 | loff_t pos = *ppos; |
fe2c6338 | 5182 | struct ctl_table lctl; |
56d417b1 BH |
5183 | int ret; |
5184 | ||
013d97e9 FR |
5185 | /* |
5186 | * ctl->data points to idev->cnf.disable_ipv6, we should | |
5187 | * not modify it until we get the rtnl lock. | |
5188 | */ | |
5189 | lctl = *ctl; | |
5190 | lctl.data = &val; | |
5191 | ||
5192 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); | |
56d417b1 BH |
5193 | |
5194 | if (write) | |
5195 | ret = addrconf_disable_ipv6(ctl, valp, val); | |
88af182e EB |
5196 | if (ret) |
5197 | *ppos = pos; | |
56d417b1 BH |
5198 | return ret; |
5199 | } | |
5200 | ||
c92d5491 | 5201 | static |
5202 | int addrconf_sysctl_proxy_ndp(struct ctl_table *ctl, int write, | |
5203 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
5204 | { | |
5205 | int *valp = ctl->data; | |
5206 | int ret; | |
5207 | int old, new; | |
5208 | ||
5209 | old = *valp; | |
5210 | ret = proc_dointvec(ctl, write, buffer, lenp, ppos); | |
5211 | new = *valp; | |
5212 | ||
5213 | if (write && old != new) { | |
5214 | struct net *net = ctl->extra2; | |
5215 | ||
5216 | if (!rtnl_trylock()) | |
5217 | return restart_syscall(); | |
5218 | ||
5219 | if (valp == &net->ipv6.devconf_dflt->proxy_ndp) | |
5220 | inet6_netconf_notify_devconf(net, NETCONFA_PROXY_NEIGH, | |
5221 | NETCONFA_IFINDEX_DEFAULT, | |
5222 | net->ipv6.devconf_dflt); | |
5223 | else if (valp == &net->ipv6.devconf_all->proxy_ndp) | |
5224 | inet6_netconf_notify_devconf(net, NETCONFA_PROXY_NEIGH, | |
5225 | NETCONFA_IFINDEX_ALL, | |
5226 | net->ipv6.devconf_all); | |
5227 | else { | |
5228 | struct inet6_dev *idev = ctl->extra1; | |
5229 | ||
5230 | inet6_netconf_notify_devconf(net, NETCONFA_PROXY_NEIGH, | |
5231 | idev->dev->ifindex, | |
5232 | &idev->cnf); | |
5233 | } | |
5234 | rtnl_unlock(); | |
5235 | } | |
5236 | ||
5237 | return ret; | |
5238 | } | |
5239 | ||
3d1bec99 HFS |
5240 | static int addrconf_sysctl_stable_secret(struct ctl_table *ctl, int write, |
5241 | void __user *buffer, size_t *lenp, | |
5242 | loff_t *ppos) | |
5243 | { | |
5244 | int err; | |
5245 | struct in6_addr addr; | |
5246 | char str[IPV6_MAX_STRLEN]; | |
5247 | struct ctl_table lctl = *ctl; | |
622c81d5 | 5248 | struct net *net = ctl->extra2; |
3d1bec99 HFS |
5249 | struct ipv6_stable_secret *secret = ctl->data; |
5250 | ||
622c81d5 HFS |
5251 | if (&net->ipv6.devconf_all->stable_secret == ctl->data) |
5252 | return -EIO; | |
5253 | ||
3d1bec99 HFS |
5254 | lctl.maxlen = IPV6_MAX_STRLEN; |
5255 | lctl.data = str; | |
5256 | ||
5257 | if (!rtnl_trylock()) | |
5258 | return restart_syscall(); | |
5259 | ||
5260 | if (!write && !secret->initialized) { | |
5261 | err = -EIO; | |
5262 | goto out; | |
5263 | } | |
5264 | ||
5265 | if (!write) { | |
5266 | err = snprintf(str, sizeof(str), "%pI6", | |
5267 | &secret->secret); | |
5268 | if (err >= sizeof(str)) { | |
5269 | err = -EIO; | |
5270 | goto out; | |
5271 | } | |
5272 | } | |
5273 | ||
5274 | err = proc_dostring(&lctl, write, buffer, lenp, ppos); | |
5275 | if (err || !write) | |
5276 | goto out; | |
5277 | ||
5278 | if (in6_pton(str, -1, addr.in6_u.u6_addr8, -1, NULL) != 1) { | |
5279 | err = -EIO; | |
5280 | goto out; | |
5281 | } | |
5282 | ||
5283 | secret->initialized = true; | |
5284 | secret->secret = addr; | |
5285 | ||
622c81d5 HFS |
5286 | if (&net->ipv6.devconf_dflt->stable_secret == ctl->data) { |
5287 | struct net_device *dev; | |
5288 | ||
5289 | for_each_netdev(net, dev) { | |
5290 | struct inet6_dev *idev = __in6_dev_get(dev); | |
5291 | ||
5292 | if (idev) { | |
5293 | idev->addr_gen_mode = | |
5294 | IN6_ADDR_GEN_MODE_STABLE_PRIVACY; | |
5295 | } | |
5296 | } | |
5297 | } else { | |
5298 | struct inet6_dev *idev = ctl->extra1; | |
5299 | ||
5300 | idev->addr_gen_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY; | |
5301 | } | |
5302 | ||
3d1bec99 HFS |
5303 | out: |
5304 | rtnl_unlock(); | |
5305 | ||
5306 | return err; | |
5307 | } | |
c92d5491 | 5308 | |
1da177e4 LT |
5309 | static struct addrconf_sysctl_table |
5310 | { | |
5311 | struct ctl_table_header *sysctl_header; | |
fe2c6338 | 5312 | struct ctl_table addrconf_vars[DEVCONF_MAX+1]; |
ab32ea5d | 5313 | } addrconf_sysctl __read_mostly = { |
1da177e4 LT |
5314 | .sysctl_header = NULL, |
5315 | .addrconf_vars = { | |
1ab1457c | 5316 | { |
e21e8467 SH |
5317 | .procname = "forwarding", |
5318 | .data = &ipv6_devconf.forwarding, | |
5319 | .maxlen = sizeof(int), | |
5320 | .mode = 0644, | |
5321 | .proc_handler = addrconf_sysctl_forward, | |
1da177e4 LT |
5322 | }, |
5323 | { | |
e21e8467 SH |
5324 | .procname = "hop_limit", |
5325 | .data = &ipv6_devconf.hop_limit, | |
5326 | .maxlen = sizeof(int), | |
5327 | .mode = 0644, | |
5328 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5329 | }, |
5330 | { | |
e21e8467 SH |
5331 | .procname = "mtu", |
5332 | .data = &ipv6_devconf.mtu6, | |
5333 | .maxlen = sizeof(int), | |
5334 | .mode = 0644, | |
77751427 | 5335 | .proc_handler = addrconf_sysctl_mtu, |
1da177e4 LT |
5336 | }, |
5337 | { | |
e21e8467 SH |
5338 | .procname = "accept_ra", |
5339 | .data = &ipv6_devconf.accept_ra, | |
5340 | .maxlen = sizeof(int), | |
5341 | .mode = 0644, | |
5342 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5343 | }, |
5344 | { | |
e21e8467 SH |
5345 | .procname = "accept_redirects", |
5346 | .data = &ipv6_devconf.accept_redirects, | |
5347 | .maxlen = sizeof(int), | |
5348 | .mode = 0644, | |
5349 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5350 | }, |
5351 | { | |
e21e8467 SH |
5352 | .procname = "autoconf", |
5353 | .data = &ipv6_devconf.autoconf, | |
5354 | .maxlen = sizeof(int), | |
5355 | .mode = 0644, | |
5356 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5357 | }, |
5358 | { | |
e21e8467 SH |
5359 | .procname = "dad_transmits", |
5360 | .data = &ipv6_devconf.dad_transmits, | |
5361 | .maxlen = sizeof(int), | |
5362 | .mode = 0644, | |
5363 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5364 | }, |
5365 | { | |
e21e8467 SH |
5366 | .procname = "router_solicitations", |
5367 | .data = &ipv6_devconf.rtr_solicits, | |
5368 | .maxlen = sizeof(int), | |
5369 | .mode = 0644, | |
5370 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5371 | }, |
5372 | { | |
e21e8467 SH |
5373 | .procname = "router_solicitation_interval", |
5374 | .data = &ipv6_devconf.rtr_solicit_interval, | |
5375 | .maxlen = sizeof(int), | |
5376 | .mode = 0644, | |
5377 | .proc_handler = proc_dointvec_jiffies, | |
1da177e4 LT |
5378 | }, |
5379 | { | |
e21e8467 SH |
5380 | .procname = "router_solicitation_delay", |
5381 | .data = &ipv6_devconf.rtr_solicit_delay, | |
5382 | .maxlen = sizeof(int), | |
5383 | .mode = 0644, | |
5384 | .proc_handler = proc_dointvec_jiffies, | |
1da177e4 LT |
5385 | }, |
5386 | { | |
e21e8467 SH |
5387 | .procname = "force_mld_version", |
5388 | .data = &ipv6_devconf.force_mld_version, | |
5389 | .maxlen = sizeof(int), | |
5390 | .mode = 0644, | |
5391 | .proc_handler = proc_dointvec, | |
1da177e4 | 5392 | }, |
fc4eba58 HFS |
5393 | { |
5394 | .procname = "mldv1_unsolicited_report_interval", | |
5395 | .data = | |
5396 | &ipv6_devconf.mldv1_unsolicited_report_interval, | |
5397 | .maxlen = sizeof(int), | |
5398 | .mode = 0644, | |
5399 | .proc_handler = proc_dointvec_ms_jiffies, | |
5400 | }, | |
5401 | { | |
5402 | .procname = "mldv2_unsolicited_report_interval", | |
5403 | .data = | |
5404 | &ipv6_devconf.mldv2_unsolicited_report_interval, | |
5405 | .maxlen = sizeof(int), | |
5406 | .mode = 0644, | |
5407 | .proc_handler = proc_dointvec_ms_jiffies, | |
5408 | }, | |
1da177e4 | 5409 | { |
e21e8467 SH |
5410 | .procname = "use_tempaddr", |
5411 | .data = &ipv6_devconf.use_tempaddr, | |
5412 | .maxlen = sizeof(int), | |
5413 | .mode = 0644, | |
5414 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5415 | }, |
5416 | { | |
e21e8467 SH |
5417 | .procname = "temp_valid_lft", |
5418 | .data = &ipv6_devconf.temp_valid_lft, | |
5419 | .maxlen = sizeof(int), | |
5420 | .mode = 0644, | |
5421 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5422 | }, |
5423 | { | |
e21e8467 SH |
5424 | .procname = "temp_prefered_lft", |
5425 | .data = &ipv6_devconf.temp_prefered_lft, | |
5426 | .maxlen = sizeof(int), | |
5427 | .mode = 0644, | |
5428 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5429 | }, |
5430 | { | |
e21e8467 SH |
5431 | .procname = "regen_max_retry", |
5432 | .data = &ipv6_devconf.regen_max_retry, | |
5433 | .maxlen = sizeof(int), | |
5434 | .mode = 0644, | |
5435 | .proc_handler = proc_dointvec, | |
1da177e4 LT |
5436 | }, |
5437 | { | |
e21e8467 SH |
5438 | .procname = "max_desync_factor", |
5439 | .data = &ipv6_devconf.max_desync_factor, | |
5440 | .maxlen = sizeof(int), | |
5441 | .mode = 0644, | |
5442 | .proc_handler = proc_dointvec, | |
1da177e4 | 5443 | }, |
1da177e4 | 5444 | { |
e21e8467 SH |
5445 | .procname = "max_addresses", |
5446 | .data = &ipv6_devconf.max_addresses, | |
5447 | .maxlen = sizeof(int), | |
5448 | .mode = 0644, | |
5449 | .proc_handler = proc_dointvec, | |
1da177e4 | 5450 | }, |
65f5c7c1 | 5451 | { |
e21e8467 SH |
5452 | .procname = "accept_ra_defrtr", |
5453 | .data = &ipv6_devconf.accept_ra_defrtr, | |
5454 | .maxlen = sizeof(int), | |
5455 | .mode = 0644, | |
5456 | .proc_handler = proc_dointvec, | |
65f5c7c1 | 5457 | }, |
c4fd30eb | 5458 | { |
e21e8467 SH |
5459 | .procname = "accept_ra_pinfo", |
5460 | .data = &ipv6_devconf.accept_ra_pinfo, | |
5461 | .maxlen = sizeof(int), | |
5462 | .mode = 0644, | |
5463 | .proc_handler = proc_dointvec, | |
c4fd30eb | 5464 | }, |
930d6ff2 YH |
5465 | #ifdef CONFIG_IPV6_ROUTER_PREF |
5466 | { | |
e21e8467 SH |
5467 | .procname = "accept_ra_rtr_pref", |
5468 | .data = &ipv6_devconf.accept_ra_rtr_pref, | |
5469 | .maxlen = sizeof(int), | |
5470 | .mode = 0644, | |
5471 | .proc_handler = proc_dointvec, | |
930d6ff2 | 5472 | }, |
52e16356 | 5473 | { |
e21e8467 SH |
5474 | .procname = "router_probe_interval", |
5475 | .data = &ipv6_devconf.rtr_probe_interval, | |
5476 | .maxlen = sizeof(int), | |
5477 | .mode = 0644, | |
5478 | .proc_handler = proc_dointvec_jiffies, | |
52e16356 | 5479 | }, |
fa03ef38 | 5480 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 | 5481 | { |
e21e8467 SH |
5482 | .procname = "accept_ra_rt_info_max_plen", |
5483 | .data = &ipv6_devconf.accept_ra_rt_info_max_plen, | |
5484 | .maxlen = sizeof(int), | |
5485 | .mode = 0644, | |
5486 | .proc_handler = proc_dointvec, | |
09c884d4 YH |
5487 | }, |
5488 | #endif | |
930d6ff2 | 5489 | #endif |
fbea49e1 | 5490 | { |
e21e8467 SH |
5491 | .procname = "proxy_ndp", |
5492 | .data = &ipv6_devconf.proxy_ndp, | |
5493 | .maxlen = sizeof(int), | |
5494 | .mode = 0644, | |
c92d5491 | 5495 | .proc_handler = addrconf_sysctl_proxy_ndp, |
fbea49e1 | 5496 | }, |
0bcbc926 | 5497 | { |
e21e8467 SH |
5498 | .procname = "accept_source_route", |
5499 | .data = &ipv6_devconf.accept_source_route, | |
5500 | .maxlen = sizeof(int), | |
5501 | .mode = 0644, | |
5502 | .proc_handler = proc_dointvec, | |
0bcbc926 | 5503 | }, |
95c385b4 NH |
5504 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
5505 | { | |
e21e8467 SH |
5506 | .procname = "optimistic_dad", |
5507 | .data = &ipv6_devconf.optimistic_dad, | |
5508 | .maxlen = sizeof(int), | |
5509 | .mode = 0644, | |
5510 | .proc_handler = proc_dointvec, | |
95c385b4 NH |
5511 | |
5512 | }, | |
7fd2561e EK |
5513 | { |
5514 | .procname = "use_optimistic", | |
5515 | .data = &ipv6_devconf.use_optimistic, | |
5516 | .maxlen = sizeof(int), | |
5517 | .mode = 0644, | |
5518 | .proc_handler = proc_dointvec, | |
5519 | ||
5520 | }, | |
7bc570c8 YH |
5521 | #endif |
5522 | #ifdef CONFIG_IPV6_MROUTE | |
5523 | { | |
e21e8467 SH |
5524 | .procname = "mc_forwarding", |
5525 | .data = &ipv6_devconf.mc_forwarding, | |
5526 | .maxlen = sizeof(int), | |
5527 | .mode = 0444, | |
5528 | .proc_handler = proc_dointvec, | |
7bc570c8 | 5529 | }, |
95c385b4 | 5530 | #endif |
778d80be | 5531 | { |
e21e8467 SH |
5532 | .procname = "disable_ipv6", |
5533 | .data = &ipv6_devconf.disable_ipv6, | |
5534 | .maxlen = sizeof(int), | |
5535 | .mode = 0644, | |
5536 | .proc_handler = addrconf_sysctl_disable, | |
778d80be | 5537 | }, |
1b34be74 | 5538 | { |
e21e8467 SH |
5539 | .procname = "accept_dad", |
5540 | .data = &ipv6_devconf.accept_dad, | |
5541 | .maxlen = sizeof(int), | |
5542 | .mode = 0644, | |
5543 | .proc_handler = proc_dointvec, | |
1b34be74 | 5544 | }, |
f7734fdf | 5545 | { |
f7734fdf OP |
5546 | .procname = "force_tllao", |
5547 | .data = &ipv6_devconf.force_tllao, | |
5548 | .maxlen = sizeof(int), | |
5549 | .mode = 0644, | |
5550 | .proc_handler = proc_dointvec | |
5551 | }, | |
5cb04436 HFS |
5552 | { |
5553 | .procname = "ndisc_notify", | |
5554 | .data = &ipv6_devconf.ndisc_notify, | |
5555 | .maxlen = sizeof(int), | |
5556 | .mode = 0644, | |
5557 | .proc_handler = proc_dointvec | |
5558 | }, | |
b800c3b9 HFS |
5559 | { |
5560 | .procname = "suppress_frag_ndisc", | |
5561 | .data = &ipv6_devconf.suppress_frag_ndisc, | |
5562 | .maxlen = sizeof(int), | |
5563 | .mode = 0644, | |
5564 | .proc_handler = proc_dointvec | |
5565 | }, | |
d9333196 BG |
5566 | { |
5567 | .procname = "accept_ra_from_local", | |
5568 | .data = &ipv6_devconf.accept_ra_from_local, | |
5569 | .maxlen = sizeof(int), | |
5570 | .mode = 0644, | |
5571 | .proc_handler = proc_dointvec, | |
5572 | }, | |
c2943f14 HH |
5573 | { |
5574 | .procname = "accept_ra_mtu", | |
5575 | .data = &ipv6_devconf.accept_ra_mtu, | |
5576 | .maxlen = sizeof(int), | |
5577 | .mode = 0644, | |
5578 | .proc_handler = proc_dointvec, | |
5579 | }, | |
3d1bec99 HFS |
5580 | { |
5581 | .procname = "stable_secret", | |
5582 | .data = &ipv6_devconf.stable_secret, | |
5583 | .maxlen = IPV6_MAX_STRLEN, | |
5584 | .mode = 0600, | |
5585 | .proc_handler = addrconf_sysctl_stable_secret, | |
5586 | }, | |
1da177e4 | 5587 | { |
f8572d8f | 5588 | /* sentinel */ |
1da177e4 LT |
5589 | } |
5590 | }, | |
1da177e4 LT |
5591 | }; |
5592 | ||
bff16c2f | 5593 | static int __addrconf_sysctl_register(struct net *net, char *dev_name, |
f8572d8f | 5594 | struct inet6_dev *idev, struct ipv6_devconf *p) |
1da177e4 LT |
5595 | { |
5596 | int i; | |
1da177e4 | 5597 | struct addrconf_sysctl_table *t; |
6105e293 | 5598 | char path[sizeof("net/ipv6/conf/") + IFNAMSIZ]; |
1dab6222 | 5599 | |
af879cc7 | 5600 | t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL); |
63159f29 | 5601 | if (!t) |
f68635e6 PE |
5602 | goto out; |
5603 | ||
bcdd553f | 5604 | for (i = 0; t->addrconf_vars[i].data; i++) { |
e21e8467 | 5605 | t->addrconf_vars[i].data += (char *)p - (char *)&ipv6_devconf; |
1da177e4 | 5606 | t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */ |
bff16c2f | 5607 | t->addrconf_vars[i].extra2 = net; |
1da177e4 | 5608 | } |
1da177e4 | 5609 | |
6105e293 | 5610 | snprintf(path, sizeof(path), "net/ipv6/conf/%s", dev_name); |
1da177e4 | 5611 | |
6105e293 | 5612 | t->sysctl_header = register_net_sysctl(net, path, t->addrconf_vars); |
63159f29 | 5613 | if (!t->sysctl_header) |
6105e293 | 5614 | goto free; |
f68635e6 PE |
5615 | |
5616 | p->sysctl = t; | |
95897312 | 5617 | return 0; |
1da177e4 | 5618 | |
f68635e6 | 5619 | free: |
1da177e4 | 5620 | kfree(t); |
f68635e6 | 5621 | out: |
95897312 | 5622 | return -ENOBUFS; |
1da177e4 LT |
5623 | } |
5624 | ||
408c4768 PE |
5625 | static void __addrconf_sysctl_unregister(struct ipv6_devconf *p) |
5626 | { | |
5627 | struct addrconf_sysctl_table *t; | |
5628 | ||
63159f29 | 5629 | if (!p->sysctl) |
408c4768 PE |
5630 | return; |
5631 | ||
5632 | t = p->sysctl; | |
5633 | p->sysctl = NULL; | |
ff538818 | 5634 | unregister_net_sysctl_table(t->sysctl_header); |
408c4768 PE |
5635 | kfree(t); |
5636 | } | |
5637 | ||
a317a2f1 | 5638 | static int addrconf_sysctl_register(struct inet6_dev *idev) |
f52295a9 | 5639 | { |
a317a2f1 WC |
5640 | int err; |
5641 | ||
5642 | if (!sysctl_dev_name_is_allowed(idev->dev->name)) | |
5643 | return -EINVAL; | |
5644 | ||
5645 | err = neigh_sysctl_register(idev->dev, idev->nd_parms, | |
5646 | &ndisc_ifinfo_sysctl_change); | |
5647 | if (err) | |
5648 | return err; | |
5649 | err = __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name, | |
5650 | idev, &idev->cnf); | |
5651 | if (err) | |
5652 | neigh_sysctl_unregister(idev->nd_parms); | |
5653 | ||
5654 | return err; | |
f52295a9 PE |
5655 | } |
5656 | ||
408c4768 | 5657 | static void addrconf_sysctl_unregister(struct inet6_dev *idev) |
1da177e4 | 5658 | { |
408c4768 PE |
5659 | __addrconf_sysctl_unregister(&idev->cnf); |
5660 | neigh_sysctl_unregister(idev->nd_parms); | |
1da177e4 LT |
5661 | } |
5662 | ||
5663 | ||
5664 | #endif | |
5665 | ||
2c8c1e72 | 5666 | static int __net_init addrconf_init_net(struct net *net) |
e0da5a48 | 5667 | { |
a79ca223 | 5668 | int err = -ENOMEM; |
e0da5a48 PE |
5669 | struct ipv6_devconf *all, *dflt; |
5670 | ||
a79ca223 | 5671 | all = kmemdup(&ipv6_devconf, sizeof(ipv6_devconf), GFP_KERNEL); |
63159f29 | 5672 | if (!all) |
a79ca223 | 5673 | goto err_alloc_all; |
e0da5a48 | 5674 | |
a79ca223 | 5675 | dflt = kmemdup(&ipv6_devconf_dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL); |
63159f29 | 5676 | if (!dflt) |
a79ca223 | 5677 | goto err_alloc_dflt; |
e0da5a48 | 5678 | |
a79ca223 HZ |
5679 | /* these will be inherited by all namespaces */ |
5680 | dflt->autoconf = ipv6_defaults.autoconf; | |
5681 | dflt->disable_ipv6 = ipv6_defaults.disable_ipv6; | |
e0da5a48 | 5682 | |
3d1bec99 HFS |
5683 | dflt->stable_secret.initialized = false; |
5684 | all->stable_secret.initialized = false; | |
5685 | ||
e0da5a48 PE |
5686 | net->ipv6.devconf_all = all; |
5687 | net->ipv6.devconf_dflt = dflt; | |
5688 | ||
5689 | #ifdef CONFIG_SYSCTL | |
f8572d8f | 5690 | err = __addrconf_sysctl_register(net, "all", NULL, all); |
e0da5a48 PE |
5691 | if (err < 0) |
5692 | goto err_reg_all; | |
5693 | ||
f8572d8f | 5694 | err = __addrconf_sysctl_register(net, "default", NULL, dflt); |
e0da5a48 PE |
5695 | if (err < 0) |
5696 | goto err_reg_dflt; | |
5697 | #endif | |
5698 | return 0; | |
5699 | ||
5700 | #ifdef CONFIG_SYSCTL | |
5701 | err_reg_dflt: | |
5702 | __addrconf_sysctl_unregister(all); | |
5703 | err_reg_all: | |
5704 | kfree(dflt); | |
5705 | #endif | |
5706 | err_alloc_dflt: | |
5707 | kfree(all); | |
5708 | err_alloc_all: | |
5709 | return err; | |
5710 | } | |
5711 | ||
2c8c1e72 | 5712 | static void __net_exit addrconf_exit_net(struct net *net) |
e0da5a48 PE |
5713 | { |
5714 | #ifdef CONFIG_SYSCTL | |
5715 | __addrconf_sysctl_unregister(net->ipv6.devconf_dflt); | |
5716 | __addrconf_sysctl_unregister(net->ipv6.devconf_all); | |
5717 | #endif | |
73cf0e92 | 5718 | kfree(net->ipv6.devconf_dflt); |
5719 | kfree(net->ipv6.devconf_all); | |
e0da5a48 PE |
5720 | } |
5721 | ||
5722 | static struct pernet_operations addrconf_ops = { | |
5723 | .init = addrconf_init_net, | |
5724 | .exit = addrconf_exit_net, | |
5725 | }; | |
5726 | ||
207895fd | 5727 | static struct rtnl_af_ops inet6_ops __read_mostly = { |
b382b191 TG |
5728 | .family = AF_INET6, |
5729 | .fill_link_af = inet6_fill_link_af, | |
5730 | .get_link_af_size = inet6_get_link_af_size, | |
11b1f828 | 5731 | .validate_link_af = inet6_validate_link_af, |
f53adae4 | 5732 | .set_link_af = inet6_set_link_af, |
b382b191 TG |
5733 | }; |
5734 | ||
1da177e4 LT |
5735 | /* |
5736 | * Init / cleanup code | |
5737 | */ | |
5738 | ||
5739 | int __init addrconf_init(void) | |
5740 | { | |
a317a2f1 | 5741 | struct inet6_dev *idev; |
c2e21293 | 5742 | int i, err; |
2a8cc6c8 | 5743 | |
e21e8467 SH |
5744 | err = ipv6_addr_label_init(); |
5745 | if (err < 0) { | |
f3213831 JP |
5746 | pr_crit("%s: cannot initialize default policy table: %d\n", |
5747 | __func__, err); | |
2cc6d2bf | 5748 | goto out; |
2a8cc6c8 | 5749 | } |
1da177e4 | 5750 | |
2cc6d2bf NH |
5751 | err = register_pernet_subsys(&addrconf_ops); |
5752 | if (err < 0) | |
5753 | goto out_addrlabel; | |
e0da5a48 | 5754 | |
c15b1cca HFS |
5755 | addrconf_wq = create_workqueue("ipv6_addrconf"); |
5756 | if (!addrconf_wq) { | |
5757 | err = -ENOMEM; | |
5758 | goto out_nowq; | |
5759 | } | |
5760 | ||
1da177e4 LT |
5761 | /* The addrconf netdev notifier requires that loopback_dev |
5762 | * has it's ipv6 private information allocated and setup | |
5763 | * before it can bring up and give link-local addresses | |
5764 | * to other devices which are up. | |
5765 | * | |
5766 | * Unfortunately, loopback_dev is not necessarily the first | |
5767 | * entry in the global dev_base list of net devices. In fact, | |
5768 | * it is likely to be the very last entry on that list. | |
5769 | * So this causes the notifier registry below to try and | |
5770 | * give link-local addresses to all devices besides loopback_dev | |
5771 | * first, then loopback_dev, which cases all the non-loopback_dev | |
5772 | * devices to fail to get a link-local address. | |
5773 | * | |
5774 | * So, as a temporary fix, allocate the ipv6 structure for | |
5775 | * loopback_dev first by hand. | |
5776 | * Longer term, all of the dependencies ipv6 has upon the loopback | |
5777 | * device and it being up should be removed. | |
5778 | */ | |
5779 | rtnl_lock(); | |
a317a2f1 | 5780 | idev = ipv6_add_dev(init_net.loopback_dev); |
1da177e4 | 5781 | rtnl_unlock(); |
a317a2f1 WC |
5782 | if (IS_ERR(idev)) { |
5783 | err = PTR_ERR(idev); | |
e0da5a48 | 5784 | goto errlo; |
a317a2f1 | 5785 | } |
1da177e4 | 5786 | |
c2e21293 | 5787 | for (i = 0; i < IN6_ADDR_HSIZE; i++) |
5788 | INIT_HLIST_HEAD(&inet6_addr_lst[i]); | |
5789 | ||
1da177e4 LT |
5790 | register_netdevice_notifier(&ipv6_dev_notf); |
5791 | ||
c15b1cca | 5792 | addrconf_verify(); |
c127ea2c | 5793 | |
3678a9d8 | 5794 | rtnl_af_register(&inet6_ops); |
b382b191 | 5795 | |
c7ac8679 GR |
5796 | err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo, |
5797 | NULL); | |
c127ea2c TG |
5798 | if (err < 0) |
5799 | goto errout; | |
5800 | ||
5801 | /* Only the first call to __rtnl_register can fail */ | |
c7ac8679 GR |
5802 | __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL, NULL); |
5803 | __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL, NULL); | |
5804 | __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, | |
5805 | inet6_dump_ifaddr, NULL); | |
5806 | __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, | |
5807 | inet6_dump_ifmcaddr, NULL); | |
5808 | __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, | |
5809 | inet6_dump_ifacaddr, NULL); | |
76f8f6cb | 5810 | __rtnl_register(PF_INET6, RTM_GETNETCONF, inet6_netconf_get_devconf, |
7a674200 | 5811 | inet6_netconf_dump_devconf, NULL); |
c127ea2c | 5812 | |
2a8cc6c8 YH |
5813 | ipv6_addr_label_rtnl_register(); |
5814 | ||
1da177e4 | 5815 | return 0; |
c127ea2c | 5816 | errout: |
b382b191 | 5817 | rtnl_af_unregister(&inet6_ops); |
c127ea2c | 5818 | unregister_netdevice_notifier(&ipv6_dev_notf); |
e0da5a48 | 5819 | errlo: |
c15b1cca HFS |
5820 | destroy_workqueue(addrconf_wq); |
5821 | out_nowq: | |
e0da5a48 | 5822 | unregister_pernet_subsys(&addrconf_ops); |
2cc6d2bf NH |
5823 | out_addrlabel: |
5824 | ipv6_addr_label_cleanup(); | |
5825 | out: | |
c127ea2c | 5826 | return err; |
1da177e4 LT |
5827 | } |
5828 | ||
09f7709f | 5829 | void addrconf_cleanup(void) |
1da177e4 | 5830 | { |
176c39af | 5831 | struct net_device *dev; |
1da177e4 LT |
5832 | int i; |
5833 | ||
5834 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
e0da5a48 | 5835 | unregister_pernet_subsys(&addrconf_ops); |
2cc6d2bf | 5836 | ipv6_addr_label_cleanup(); |
1da177e4 LT |
5837 | |
5838 | rtnl_lock(); | |
5839 | ||
b382b191 TG |
5840 | __rtnl_af_unregister(&inet6_ops); |
5841 | ||
176c39af DL |
5842 | /* clean dev list */ |
5843 | for_each_netdev(&init_net, dev) { | |
5844 | if (__in6_dev_get(dev) == NULL) | |
5845 | continue; | |
5846 | addrconf_ifdown(dev, 1); | |
5847 | } | |
5848 | addrconf_ifdown(init_net.loopback_dev, 2); | |
5849 | ||
1da177e4 LT |
5850 | /* |
5851 | * Check hash table. | |
5852 | */ | |
5c578aed | 5853 | spin_lock_bh(&addrconf_hash_lock); |
c2e21293 | 5854 | for (i = 0; i < IN6_ADDR_HSIZE; i++) |
5855 | WARN_ON(!hlist_empty(&inet6_addr_lst[i])); | |
5c578aed | 5856 | spin_unlock_bh(&addrconf_hash_lock); |
c15b1cca | 5857 | cancel_delayed_work(&addr_chk_work); |
1da177e4 | 5858 | rtnl_unlock(); |
c15b1cca HFS |
5859 | |
5860 | destroy_workqueue(addrconf_wq); | |
1da177e4 | 5861 | } |