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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 | ||
5241c2d7 | 73 | #include <net/6lowpan.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> |
ca254490 | 84 | #include <net/l3mdev.h> |
1da177e4 LT |
85 | #include <linux/if_tunnel.h> |
86 | #include <linux/rtnetlink.h> | |
f3a1bfb1 | 87 | #include <linux/netconf.h> |
1da177e4 | 88 | #include <linux/random.h> |
e21e8467 | 89 | #include <linux/uaccess.h> |
7f7d9a6b | 90 | #include <asm/unaligned.h> |
1da177e4 LT |
91 | |
92 | #include <linux/proc_fs.h> | |
93 | #include <linux/seq_file.h> | |
bc3b2d7f | 94 | #include <linux/export.h> |
1da177e4 LT |
95 | |
96 | /* Set to 3 to get tracing... */ | |
97 | #define ACONF_DEBUG 2 | |
98 | ||
99 | #if ACONF_DEBUG >= 3 | |
ba3542e1 | 100 | #define ADBG(fmt, ...) printk(fmt, ##__VA_ARGS__) |
1da177e4 | 101 | #else |
ba3542e1 | 102 | #define ADBG(fmt, ...) do { if (0) printk(fmt, ##__VA_ARGS__); } while (0) |
1da177e4 LT |
103 | #endif |
104 | ||
105 | #define INFINITY_LIFE_TIME 0xFFFFFFFF | |
18a31e1e | 106 | |
3d1bec99 HFS |
107 | #define IPV6_MAX_STRLEN \ |
108 | sizeof("ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255") | |
109 | ||
18a31e1e TG |
110 | static inline u32 cstamp_delta(unsigned long cstamp) |
111 | { | |
112 | return (cstamp - INITIAL_JIFFIES) * 100UL / HZ; | |
113 | } | |
1da177e4 | 114 | |
bd11f074 MŻ |
115 | static inline s32 rfc3315_s14_backoff_init(s32 irt) |
116 | { | |
117 | /* multiply 'initial retransmission time' by 0.9 .. 1.1 */ | |
118 | u64 tmp = (900000 + prandom_u32() % 200001) * (u64)irt; | |
119 | do_div(tmp, 1000000); | |
120 | return (s32)tmp; | |
121 | } | |
122 | ||
123 | static inline s32 rfc3315_s14_backoff_update(s32 rt, s32 mrt) | |
124 | { | |
125 | /* multiply 'retransmission timeout' by 1.9 .. 2.1 */ | |
126 | u64 tmp = (1900000 + prandom_u32() % 200001) * (u64)rt; | |
127 | do_div(tmp, 1000000); | |
128 | if ((s32)tmp > mrt) { | |
129 | /* multiply 'maximum retransmission time' by 0.9 .. 1.1 */ | |
130 | tmp = (900000 + prandom_u32() % 200001) * (u64)mrt; | |
131 | do_div(tmp, 1000000); | |
132 | } | |
133 | return (s32)tmp; | |
134 | } | |
135 | ||
1da177e4 | 136 | #ifdef CONFIG_SYSCTL |
a317a2f1 | 137 | static int addrconf_sysctl_register(struct inet6_dev *idev); |
408c4768 PE |
138 | static void addrconf_sysctl_unregister(struct inet6_dev *idev); |
139 | #else | |
a317a2f1 | 140 | static inline int addrconf_sysctl_register(struct inet6_dev *idev) |
408c4768 | 141 | { |
a317a2f1 | 142 | return 0; |
408c4768 PE |
143 | } |
144 | ||
145 | static inline void addrconf_sysctl_unregister(struct inet6_dev *idev) | |
146 | { | |
147 | } | |
1da177e4 LT |
148 | #endif |
149 | ||
9d6280da JB |
150 | static void ipv6_regen_rndid(struct inet6_dev *idev); |
151 | static void ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr); | |
1da177e4 | 152 | |
1b34be74 | 153 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev); |
1da177e4 | 154 | static int ipv6_count_addresses(struct inet6_dev *idev); |
622c81d5 HFS |
155 | static int ipv6_generate_stable_address(struct in6_addr *addr, |
156 | u8 dad_count, | |
157 | const struct inet6_dev *idev); | |
1da177e4 LT |
158 | |
159 | /* | |
160 | * Configured unicast address hash table | |
161 | */ | |
c2e21293 | 162 | static struct hlist_head inet6_addr_lst[IN6_ADDR_HSIZE]; |
5c578aed | 163 | static DEFINE_SPINLOCK(addrconf_hash_lock); |
1da177e4 | 164 | |
c15b1cca HFS |
165 | static void addrconf_verify(void); |
166 | static void addrconf_verify_rtnl(void); | |
167 | static void addrconf_verify_work(struct work_struct *); | |
1da177e4 | 168 | |
c15b1cca HFS |
169 | static struct workqueue_struct *addrconf_wq; |
170 | static DECLARE_DELAYED_WORK(addr_chk_work, addrconf_verify_work); | |
1da177e4 LT |
171 | |
172 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp); | |
173 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp); | |
174 | ||
93d9b7d7 JP |
175 | static void addrconf_type_change(struct net_device *dev, |
176 | unsigned long event); | |
1da177e4 LT |
177 | static int addrconf_ifdown(struct net_device *dev, int how); |
178 | ||
21caa662 RK |
179 | static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx, |
180 | int plen, | |
181 | const struct net_device *dev, | |
182 | u32 flags, u32 noflags); | |
183 | ||
cf22f9a2 | 184 | static void addrconf_dad_start(struct inet6_ifaddr *ifp); |
c15b1cca | 185 | static void addrconf_dad_work(struct work_struct *w); |
764d3be6 | 186 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp, bool bump_id); |
c5e33bdd | 187 | static void addrconf_dad_run(struct inet6_dev *idev); |
1da177e4 LT |
188 | static void addrconf_rs_timer(unsigned long data); |
189 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
190 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
191 | ||
1ab1457c | 192 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 | 193 | struct prefix_info *pinfo); |
3e81c6da DM |
194 | static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
195 | struct net_device *dev); | |
1da177e4 | 196 | |
888c848e | 197 | static struct ipv6_devconf ipv6_devconf __read_mostly = { |
1da177e4 LT |
198 | .forwarding = 0, |
199 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
200 | .mtu6 = IPV6_MIN_MTU, | |
201 | .accept_ra = 1, | |
202 | .accept_redirects = 1, | |
203 | .autoconf = 1, | |
204 | .force_mld_version = 0, | |
fc4eba58 HFS |
205 | .mldv1_unsolicited_report_interval = 10 * HZ, |
206 | .mldv2_unsolicited_report_interval = HZ, | |
1da177e4 LT |
207 | .dad_transmits = 1, |
208 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
209 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
bd11f074 | 210 | .rtr_solicit_max_interval = RTR_SOLICITATION_MAX_INTERVAL, |
1da177e4 | 211 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, |
67ba4152 | 212 | .use_tempaddr = 0, |
1da177e4 LT |
213 | .temp_valid_lft = TEMP_VALID_LIFETIME, |
214 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
215 | .regen_max_retry = REGEN_MAX_RETRY, | |
216 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
1da177e4 | 217 | .max_addresses = IPV6_MAX_ADDRESSES, |
65f5c7c1 | 218 | .accept_ra_defrtr = 1, |
d9333196 | 219 | .accept_ra_from_local = 0, |
8013d1d7 | 220 | .accept_ra_min_hop_limit= 1, |
c4fd30eb | 221 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
222 | #ifdef CONFIG_IPV6_ROUTER_PREF |
223 | .accept_ra_rtr_pref = 1, | |
52e16356 | 224 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
225 | #ifdef CONFIG_IPV6_ROUTE_INFO |
226 | .accept_ra_rt_info_max_plen = 0, | |
227 | #endif | |
930d6ff2 | 228 | #endif |
fbea49e1 | 229 | .proxy_ndp = 0, |
0bcbc926 | 230 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
778d80be | 231 | .disable_ipv6 = 0, |
1b34be74 | 232 | .accept_dad = 1, |
b800c3b9 | 233 | .suppress_frag_ndisc = 1, |
c2943f14 | 234 | .accept_ra_mtu = 1, |
3d1bec99 HFS |
235 | .stable_secret = { |
236 | .initialized = false, | |
3985e8a3 EK |
237 | }, |
238 | .use_oif_addrs_only = 0, | |
35103d11 | 239 | .ignore_routes_with_linkdown = 0, |
f1705ec1 | 240 | .keep_addr_on_down = 0, |
1ababeba | 241 | .seg6_enabled = 0, |
bf355b8d DL |
242 | #ifdef CONFIG_IPV6_SEG6_HMAC |
243 | .seg6_require_hmac = 0, | |
244 | #endif | |
adc176c5 | 245 | .enhanced_dad = 1, |
d35a00b8 | 246 | .addr_gen_mode = IN6_ADDR_GEN_MODE_EUI64, |
1da177e4 LT |
247 | }; |
248 | ||
ab32ea5d | 249 | static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = { |
1da177e4 LT |
250 | .forwarding = 0, |
251 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
252 | .mtu6 = IPV6_MIN_MTU, | |
253 | .accept_ra = 1, | |
254 | .accept_redirects = 1, | |
255 | .autoconf = 1, | |
fc4eba58 HFS |
256 | .force_mld_version = 0, |
257 | .mldv1_unsolicited_report_interval = 10 * HZ, | |
258 | .mldv2_unsolicited_report_interval = HZ, | |
1da177e4 LT |
259 | .dad_transmits = 1, |
260 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
261 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
bd11f074 | 262 | .rtr_solicit_max_interval = RTR_SOLICITATION_MAX_INTERVAL, |
1da177e4 | 263 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, |
1da177e4 LT |
264 | .use_tempaddr = 0, |
265 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
266 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
267 | .regen_max_retry = REGEN_MAX_RETRY, | |
268 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
1da177e4 | 269 | .max_addresses = IPV6_MAX_ADDRESSES, |
65f5c7c1 | 270 | .accept_ra_defrtr = 1, |
d9333196 | 271 | .accept_ra_from_local = 0, |
8013d1d7 | 272 | .accept_ra_min_hop_limit= 1, |
c4fd30eb | 273 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
274 | #ifdef CONFIG_IPV6_ROUTER_PREF |
275 | .accept_ra_rtr_pref = 1, | |
52e16356 | 276 | .rtr_probe_interval = 60 * HZ, |
09c884d4 YH |
277 | #ifdef CONFIG_IPV6_ROUTE_INFO |
278 | .accept_ra_rt_info_max_plen = 0, | |
279 | #endif | |
930d6ff2 | 280 | #endif |
fbea49e1 | 281 | .proxy_ndp = 0, |
0bcbc926 | 282 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
778d80be | 283 | .disable_ipv6 = 0, |
1b34be74 | 284 | .accept_dad = 1, |
b800c3b9 | 285 | .suppress_frag_ndisc = 1, |
c2943f14 | 286 | .accept_ra_mtu = 1, |
3d1bec99 HFS |
287 | .stable_secret = { |
288 | .initialized = false, | |
289 | }, | |
3985e8a3 | 290 | .use_oif_addrs_only = 0, |
35103d11 | 291 | .ignore_routes_with_linkdown = 0, |
f1705ec1 | 292 | .keep_addr_on_down = 0, |
1ababeba | 293 | .seg6_enabled = 0, |
bf355b8d DL |
294 | #ifdef CONFIG_IPV6_SEG6_HMAC |
295 | .seg6_require_hmac = 0, | |
296 | #endif | |
adc176c5 | 297 | .enhanced_dad = 1, |
d35a00b8 | 298 | .addr_gen_mode = IN6_ADDR_GEN_MODE_EUI64, |
1da177e4 LT |
299 | }; |
300 | ||
f24e3d65 | 301 | /* Check if a valid qdisc is available */ |
05297949 | 302 | static inline bool addrconf_qdisc_ok(const struct net_device *dev) |
f24e3d65 | 303 | { |
05297949 | 304 | return !qdisc_tx_is_noop(dev); |
f24e3d65 MC |
305 | } |
306 | ||
b7b1bfce | 307 | static void addrconf_del_rs_timer(struct inet6_dev *idev) |
1da177e4 | 308 | { |
b7b1bfce HFS |
309 | if (del_timer(&idev->rs_timer)) |
310 | __in6_dev_put(idev); | |
311 | } | |
312 | ||
c15b1cca | 313 | static void addrconf_del_dad_work(struct inet6_ifaddr *ifp) |
b7b1bfce | 314 | { |
c15b1cca | 315 | if (cancel_delayed_work(&ifp->dad_work)) |
1da177e4 LT |
316 | __in6_ifa_put(ifp); |
317 | } | |
318 | ||
b7b1bfce HFS |
319 | static void addrconf_mod_rs_timer(struct inet6_dev *idev, |
320 | unsigned long when) | |
321 | { | |
322 | if (!timer_pending(&idev->rs_timer)) | |
323 | in6_dev_hold(idev); | |
324 | mod_timer(&idev->rs_timer, jiffies + when); | |
325 | } | |
1da177e4 | 326 | |
c15b1cca HFS |
327 | static void addrconf_mod_dad_work(struct inet6_ifaddr *ifp, |
328 | unsigned long delay) | |
1da177e4 | 329 | { |
c15b1cca | 330 | if (!delayed_work_pending(&ifp->dad_work)) |
1da177e4 | 331 | in6_ifa_hold(ifp); |
c15b1cca | 332 | mod_delayed_work(addrconf_wq, &ifp->dad_work, delay); |
1da177e4 LT |
333 | } |
334 | ||
7f7d9a6b HX |
335 | static int snmp6_alloc_dev(struct inet6_dev *idev) |
336 | { | |
827da44c JS |
337 | int i; |
338 | ||
698365fa WC |
339 | idev->stats.ipv6 = alloc_percpu(struct ipstats_mib); |
340 | if (!idev->stats.ipv6) | |
7f7d9a6b | 341 | goto err_ip; |
827da44c JS |
342 | |
343 | for_each_possible_cpu(i) { | |
344 | struct ipstats_mib *addrconf_stats; | |
698365fa | 345 | addrconf_stats = per_cpu_ptr(idev->stats.ipv6, i); |
827da44c | 346 | u64_stats_init(&addrconf_stats->syncp); |
827da44c JS |
347 | } |
348 | ||
349 | ||
be281e55 ED |
350 | idev->stats.icmpv6dev = kzalloc(sizeof(struct icmpv6_mib_device), |
351 | GFP_KERNEL); | |
352 | if (!idev->stats.icmpv6dev) | |
7f7d9a6b | 353 | goto err_icmp; |
be281e55 ED |
354 | idev->stats.icmpv6msgdev = kzalloc(sizeof(struct icmpv6msg_mib_device), |
355 | GFP_KERNEL); | |
356 | if (!idev->stats.icmpv6msgdev) | |
14878f75 | 357 | goto err_icmpmsg; |
7f7d9a6b HX |
358 | |
359 | return 0; | |
360 | ||
14878f75 | 361 | err_icmpmsg: |
be281e55 | 362 | kfree(idev->stats.icmpv6dev); |
7f7d9a6b | 363 | err_icmp: |
698365fa | 364 | free_percpu(idev->stats.ipv6); |
7f7d9a6b | 365 | err_ip: |
aaf70ec7 | 366 | return -ENOMEM; |
7f7d9a6b HX |
367 | } |
368 | ||
8e5e8f30 | 369 | static struct inet6_dev *ipv6_add_dev(struct net_device *dev) |
1da177e4 LT |
370 | { |
371 | struct inet6_dev *ndev; | |
a317a2f1 | 372 | int err = -ENOMEM; |
1da177e4 LT |
373 | |
374 | ASSERT_RTNL(); | |
375 | ||
376 | if (dev->mtu < IPV6_MIN_MTU) | |
a317a2f1 | 377 | return ERR_PTR(-EINVAL); |
1da177e4 | 378 | |
1ab1457c | 379 | ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL); |
63159f29 | 380 | if (!ndev) |
a317a2f1 | 381 | return ERR_PTR(err); |
322f74a4 IO |
382 | |
383 | rwlock_init(&ndev->lock); | |
384 | ndev->dev = dev; | |
502a2ffd | 385 | INIT_LIST_HEAD(&ndev->addr_list); |
b7b1bfce HFS |
386 | setup_timer(&ndev->rs_timer, addrconf_rs_timer, |
387 | (unsigned long)ndev); | |
c346dca1 | 388 | memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf)); |
9b29c696 HFS |
389 | |
390 | if (ndev->cnf.stable_secret.initialized) | |
d35a00b8 | 391 | ndev->cnf.addr_gen_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY; |
9b29c696 | 392 | else |
d35a00b8 | 393 | ndev->cnf.addr_gen_mode = ipv6_devconf_dflt.addr_gen_mode; |
9b29c696 | 394 | |
322f74a4 | 395 | ndev->cnf.mtu6 = dev->mtu; |
322f74a4 | 396 | ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); |
63159f29 | 397 | if (!ndev->nd_parms) { |
322f74a4 | 398 | kfree(ndev); |
a317a2f1 | 399 | return ERR_PTR(err); |
322f74a4 | 400 | } |
0187bdfb BH |
401 | if (ndev->cnf.forwarding) |
402 | dev_disable_lro(dev); | |
322f74a4 IO |
403 | /* We refer to the device */ |
404 | dev_hold(dev); | |
1da177e4 | 405 | |
322f74a4 | 406 | if (snmp6_alloc_dev(ndev) < 0) { |
ba3542e1 | 407 | ADBG(KERN_WARNING |
f3213831 | 408 | "%s: cannot allocate memory for statistics; dev=%s.\n", |
ba3542e1 | 409 | __func__, dev->name); |
322f74a4 | 410 | neigh_parms_release(&nd_tbl, ndev->nd_parms); |
8603e33d RL |
411 | dev_put(dev); |
412 | kfree(ndev); | |
a317a2f1 | 413 | return ERR_PTR(err); |
322f74a4 | 414 | } |
1da177e4 | 415 | |
322f74a4 | 416 | if (snmp6_register_dev(ndev) < 0) { |
ba3542e1 | 417 | ADBG(KERN_WARNING |
f3213831 | 418 | "%s: cannot create /proc/net/dev_snmp6/%s\n", |
ba3542e1 | 419 | __func__, dev->name); |
a317a2f1 | 420 | goto err_release; |
322f74a4 IO |
421 | } |
422 | ||
9d6280da | 423 | /* One reference from device. */ |
322f74a4 | 424 | in6_dev_hold(ndev); |
1da177e4 | 425 | |
1b34be74 YH |
426 | if (dev->flags & (IFF_NOARP | IFF_LOOPBACK)) |
427 | ndev->cnf.accept_dad = -1; | |
428 | ||
07a93626 | 429 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
b077d7ab | 430 | if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) { |
f3213831 | 431 | pr_info("%s: Disabled Multicast RS\n", dev->name); |
b077d7ab YH |
432 | ndev->cnf.rtr_solicits = 0; |
433 | } | |
434 | #endif | |
435 | ||
372e6c8f | 436 | INIT_LIST_HEAD(&ndev->tempaddr_list); |
76506a98 | 437 | ndev->desync_factor = U32_MAX; |
322f74a4 IO |
438 | if ((dev->flags&IFF_LOOPBACK) || |
439 | dev->type == ARPHRD_TUNNEL || | |
9625ed72 | 440 | dev->type == ARPHRD_TUNNEL6 || |
0be669bb | 441 | dev->type == ARPHRD_SIT || |
0be669bb | 442 | dev->type == ARPHRD_NONE) { |
322f74a4 | 443 | ndev->cnf.use_tempaddr = -1; |
9d6280da JB |
444 | } else |
445 | ipv6_regen_rndid(ndev); | |
5d9efa7e | 446 | |
914faa14 | 447 | ndev->token = in6addr_any; |
1da177e4 | 448 | |
f24e3d65 | 449 | if (netif_running(dev) && addrconf_qdisc_ok(dev)) |
53aadcc9 HX |
450 | ndev->if_flags |= IF_READY; |
451 | ||
322f74a4 IO |
452 | ipv6_mc_init_dev(ndev); |
453 | ndev->tstamp = jiffies; | |
a317a2f1 WC |
454 | err = addrconf_sysctl_register(ndev); |
455 | if (err) { | |
456 | ipv6_mc_destroy_dev(ndev); | |
2a189f9e | 457 | snmp6_unregister_dev(ndev); |
a317a2f1 WC |
458 | goto err_release; |
459 | } | |
30c4cf57 | 460 | /* protected by rtnl_lock */ |
cf778b00 | 461 | rcu_assign_pointer(dev->ip6_ptr, ndev); |
d88ae4cc | 462 | |
2c5e8933 HFS |
463 | /* Join interface-local all-node multicast group */ |
464 | ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allnodes); | |
465 | ||
d88ae4cc | 466 | /* Join all-node multicast group */ |
f3ee4010 | 467 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes); |
d88ae4cc | 468 | |
d6ddef9e | 469 | /* Join all-router multicast group if forwarding is set */ |
8b2aaede | 470 | if (ndev->cnf.forwarding && (dev->flags & IFF_MULTICAST)) |
d6ddef9e LW |
471 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
472 | ||
1da177e4 | 473 | return ndev; |
a317a2f1 WC |
474 | |
475 | err_release: | |
476 | neigh_parms_release(&nd_tbl, ndev->nd_parms); | |
477 | ndev->dead = 1; | |
478 | in6_dev_finish_destroy(ndev); | |
479 | return ERR_PTR(err); | |
1da177e4 LT |
480 | } |
481 | ||
8e5e8f30 | 482 | static struct inet6_dev *ipv6_find_idev(struct net_device *dev) |
1da177e4 LT |
483 | { |
484 | struct inet6_dev *idev; | |
485 | ||
486 | ASSERT_RTNL(); | |
487 | ||
e21e8467 SH |
488 | idev = __in6_dev_get(dev); |
489 | if (!idev) { | |
490 | idev = ipv6_add_dev(dev); | |
a317a2f1 | 491 | if (IS_ERR(idev)) |
1da177e4 LT |
492 | return NULL; |
493 | } | |
c5e33bdd | 494 | |
1da177e4 LT |
495 | if (dev->flags&IFF_UP) |
496 | ipv6_mc_up(idev); | |
497 | return idev; | |
498 | } | |
499 | ||
f3a1bfb1 ND |
500 | static int inet6_netconf_msgsize_devconf(int type) |
501 | { | |
502 | int size = NLMSG_ALIGN(sizeof(struct netconfmsg)) | |
503 | + nla_total_size(4); /* NETCONFA_IFINDEX */ | |
136ba622 | 504 | bool all = false; |
f3a1bfb1 | 505 | |
136ba622 ZS |
506 | if (type == NETCONFA_ALL) |
507 | all = true; | |
508 | ||
509 | if (all || type == NETCONFA_FORWARDING) | |
f3a1bfb1 | 510 | size += nla_total_size(4); |
b1afce95 | 511 | #ifdef CONFIG_IPV6_MROUTE |
136ba622 | 512 | if (all || type == NETCONFA_MC_FORWARDING) |
d67b8c61 | 513 | size += nla_total_size(4); |
b1afce95 | 514 | #endif |
136ba622 | 515 | if (all || type == NETCONFA_PROXY_NEIGH) |
c92d5491 | 516 | size += nla_total_size(4); |
f3a1bfb1 | 517 | |
136ba622 | 518 | if (all || type == NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN) |
35103d11 AG |
519 | size += nla_total_size(4); |
520 | ||
f3a1bfb1 ND |
521 | return size; |
522 | } | |
523 | ||
524 | static int inet6_netconf_fill_devconf(struct sk_buff *skb, int ifindex, | |
525 | struct ipv6_devconf *devconf, u32 portid, | |
526 | u32 seq, int event, unsigned int flags, | |
527 | int type) | |
528 | { | |
529 | struct nlmsghdr *nlh; | |
530 | struct netconfmsg *ncm; | |
136ba622 | 531 | bool all = false; |
f3a1bfb1 ND |
532 | |
533 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct netconfmsg), | |
534 | flags); | |
63159f29 | 535 | if (!nlh) |
f3a1bfb1 ND |
536 | return -EMSGSIZE; |
537 | ||
136ba622 ZS |
538 | if (type == NETCONFA_ALL) |
539 | all = true; | |
540 | ||
f3a1bfb1 ND |
541 | ncm = nlmsg_data(nlh); |
542 | ncm->ncm_family = AF_INET6; | |
543 | ||
544 | if (nla_put_s32(skb, NETCONFA_IFINDEX, ifindex) < 0) | |
545 | goto nla_put_failure; | |
546 | ||
136ba622 | 547 | if ((all || type == NETCONFA_FORWARDING) && |
f3a1bfb1 ND |
548 | nla_put_s32(skb, NETCONFA_FORWARDING, devconf->forwarding) < 0) |
549 | goto nla_put_failure; | |
b1afce95 | 550 | #ifdef CONFIG_IPV6_MROUTE |
136ba622 | 551 | if ((all || type == NETCONFA_MC_FORWARDING) && |
d67b8c61 ND |
552 | nla_put_s32(skb, NETCONFA_MC_FORWARDING, |
553 | devconf->mc_forwarding) < 0) | |
554 | goto nla_put_failure; | |
b1afce95 | 555 | #endif |
136ba622 | 556 | if ((all || type == NETCONFA_PROXY_NEIGH) && |
c92d5491 | 557 | nla_put_s32(skb, NETCONFA_PROXY_NEIGH, devconf->proxy_ndp) < 0) |
558 | goto nla_put_failure; | |
559 | ||
136ba622 | 560 | if ((all || type == NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN) && |
35103d11 AG |
561 | nla_put_s32(skb, NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN, |
562 | devconf->ignore_routes_with_linkdown) < 0) | |
563 | goto nla_put_failure; | |
564 | ||
053c095a JB |
565 | nlmsg_end(skb, nlh); |
566 | return 0; | |
f3a1bfb1 ND |
567 | |
568 | nla_put_failure: | |
569 | nlmsg_cancel(skb, nlh); | |
570 | return -EMSGSIZE; | |
571 | } | |
572 | ||
d67b8c61 ND |
573 | void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex, |
574 | struct ipv6_devconf *devconf) | |
f3a1bfb1 ND |
575 | { |
576 | struct sk_buff *skb; | |
577 | int err = -ENOBUFS; | |
578 | ||
927265bc | 579 | skb = nlmsg_new(inet6_netconf_msgsize_devconf(type), GFP_KERNEL); |
63159f29 | 580 | if (!skb) |
f3a1bfb1 ND |
581 | goto errout; |
582 | ||
583 | err = inet6_netconf_fill_devconf(skb, ifindex, devconf, 0, 0, | |
584 | RTM_NEWNETCONF, 0, type); | |
585 | if (err < 0) { | |
586 | /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */ | |
587 | WARN_ON(err == -EMSGSIZE); | |
588 | kfree_skb(skb); | |
589 | goto errout; | |
590 | } | |
927265bc | 591 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_NETCONF, NULL, GFP_KERNEL); |
f3a1bfb1 ND |
592 | return; |
593 | errout: | |
bd779028 | 594 | rtnl_set_sk_err(net, RTNLGRP_IPV6_NETCONF, err); |
f3a1bfb1 ND |
595 | } |
596 | ||
76f8f6cb ND |
597 | static const struct nla_policy devconf_ipv6_policy[NETCONFA_MAX+1] = { |
598 | [NETCONFA_IFINDEX] = { .len = sizeof(int) }, | |
599 | [NETCONFA_FORWARDING] = { .len = sizeof(int) }, | |
c92d5491 | 600 | [NETCONFA_PROXY_NEIGH] = { .len = sizeof(int) }, |
35103d11 | 601 | [NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN] = { .len = sizeof(int) }, |
76f8f6cb ND |
602 | }; |
603 | ||
604 | static int inet6_netconf_get_devconf(struct sk_buff *in_skb, | |
661d2967 | 605 | struct nlmsghdr *nlh) |
76f8f6cb ND |
606 | { |
607 | struct net *net = sock_net(in_skb->sk); | |
608 | struct nlattr *tb[NETCONFA_MAX+1]; | |
609 | struct netconfmsg *ncm; | |
610 | struct sk_buff *skb; | |
611 | struct ipv6_devconf *devconf; | |
612 | struct inet6_dev *in6_dev; | |
613 | struct net_device *dev; | |
614 | int ifindex; | |
615 | int err; | |
616 | ||
617 | err = nlmsg_parse(nlh, sizeof(*ncm), tb, NETCONFA_MAX, | |
618 | devconf_ipv6_policy); | |
619 | if (err < 0) | |
620 | goto errout; | |
621 | ||
a97eb33f | 622 | err = -EINVAL; |
76f8f6cb ND |
623 | if (!tb[NETCONFA_IFINDEX]) |
624 | goto errout; | |
625 | ||
626 | ifindex = nla_get_s32(tb[NETCONFA_IFINDEX]); | |
627 | switch (ifindex) { | |
628 | case NETCONFA_IFINDEX_ALL: | |
629 | devconf = net->ipv6.devconf_all; | |
630 | break; | |
631 | case NETCONFA_IFINDEX_DEFAULT: | |
632 | devconf = net->ipv6.devconf_dflt; | |
633 | break; | |
634 | default: | |
635 | dev = __dev_get_by_index(net, ifindex); | |
63159f29 | 636 | if (!dev) |
76f8f6cb ND |
637 | goto errout; |
638 | in6_dev = __in6_dev_get(dev); | |
63159f29 | 639 | if (!in6_dev) |
76f8f6cb ND |
640 | goto errout; |
641 | devconf = &in6_dev->cnf; | |
642 | break; | |
643 | } | |
644 | ||
645 | err = -ENOBUFS; | |
136ba622 | 646 | skb = nlmsg_new(inet6_netconf_msgsize_devconf(NETCONFA_ALL), GFP_ATOMIC); |
63159f29 | 647 | if (!skb) |
76f8f6cb ND |
648 | goto errout; |
649 | ||
650 | err = inet6_netconf_fill_devconf(skb, ifindex, devconf, | |
651 | NETLINK_CB(in_skb).portid, | |
652 | nlh->nlmsg_seq, RTM_NEWNETCONF, 0, | |
136ba622 | 653 | NETCONFA_ALL); |
76f8f6cb ND |
654 | if (err < 0) { |
655 | /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */ | |
656 | WARN_ON(err == -EMSGSIZE); | |
657 | kfree_skb(skb); | |
658 | goto errout; | |
659 | } | |
660 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); | |
661 | errout: | |
662 | return err; | |
663 | } | |
664 | ||
7a674200 ND |
665 | static int inet6_netconf_dump_devconf(struct sk_buff *skb, |
666 | struct netlink_callback *cb) | |
667 | { | |
668 | struct net *net = sock_net(skb->sk); | |
669 | int h, s_h; | |
670 | int idx, s_idx; | |
671 | struct net_device *dev; | |
672 | struct inet6_dev *idev; | |
673 | struct hlist_head *head; | |
674 | ||
675 | s_h = cb->args[0]; | |
676 | s_idx = idx = cb->args[1]; | |
677 | ||
678 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
679 | idx = 0; | |
680 | head = &net->dev_index_head[h]; | |
681 | rcu_read_lock(); | |
63998ac2 ND |
682 | cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^ |
683 | net->dev_base_seq; | |
7a674200 ND |
684 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
685 | if (idx < s_idx) | |
686 | goto cont; | |
687 | idev = __in6_dev_get(dev); | |
688 | if (!idev) | |
689 | goto cont; | |
690 | ||
691 | if (inet6_netconf_fill_devconf(skb, dev->ifindex, | |
692 | &idev->cnf, | |
693 | NETLINK_CB(cb->skb).portid, | |
694 | cb->nlh->nlmsg_seq, | |
695 | RTM_NEWNETCONF, | |
696 | NLM_F_MULTI, | |
136ba622 | 697 | NETCONFA_ALL) < 0) { |
7a674200 ND |
698 | rcu_read_unlock(); |
699 | goto done; | |
700 | } | |
63998ac2 | 701 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
7a674200 ND |
702 | cont: |
703 | idx++; | |
704 | } | |
705 | rcu_read_unlock(); | |
706 | } | |
707 | if (h == NETDEV_HASHENTRIES) { | |
708 | if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_ALL, | |
709 | net->ipv6.devconf_all, | |
710 | NETLINK_CB(cb->skb).portid, | |
711 | cb->nlh->nlmsg_seq, | |
712 | RTM_NEWNETCONF, NLM_F_MULTI, | |
136ba622 | 713 | NETCONFA_ALL) < 0) |
7a674200 ND |
714 | goto done; |
715 | else | |
716 | h++; | |
717 | } | |
718 | if (h == NETDEV_HASHENTRIES + 1) { | |
719 | if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_DEFAULT, | |
720 | net->ipv6.devconf_dflt, | |
721 | NETLINK_CB(cb->skb).portid, | |
722 | cb->nlh->nlmsg_seq, | |
723 | RTM_NEWNETCONF, NLM_F_MULTI, | |
136ba622 | 724 | NETCONFA_ALL) < 0) |
7a674200 ND |
725 | goto done; |
726 | else | |
727 | h++; | |
728 | } | |
729 | done: | |
730 | cb->args[0] = h; | |
731 | cb->args[1] = idx; | |
732 | ||
733 | return skb->len; | |
734 | } | |
735 | ||
1da177e4 LT |
736 | #ifdef CONFIG_SYSCTL |
737 | static void dev_forward_change(struct inet6_dev *idev) | |
738 | { | |
739 | struct net_device *dev; | |
740 | struct inet6_ifaddr *ifa; | |
1da177e4 LT |
741 | |
742 | if (!idev) | |
743 | return; | |
744 | dev = idev->dev; | |
0187bdfb BH |
745 | if (idev->cnf.forwarding) |
746 | dev_disable_lro(dev); | |
1a940835 | 747 | if (dev->flags & IFF_MULTICAST) { |
2c5e8933 | 748 | if (idev->cnf.forwarding) { |
f3ee4010 | 749 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
2c5e8933 HFS |
750 | ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allrouters); |
751 | ipv6_dev_mc_inc(dev, &in6addr_sitelocal_allrouters); | |
752 | } else { | |
f3ee4010 | 753 | ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters); |
2c5e8933 HFS |
754 | ipv6_dev_mc_dec(dev, &in6addr_interfacelocal_allrouters); |
755 | ipv6_dev_mc_dec(dev, &in6addr_sitelocal_allrouters); | |
756 | } | |
1da177e4 | 757 | } |
502a2ffd | 758 | |
759 | list_for_each_entry(ifa, &idev->addr_list, if_list) { | |
2c12a74c MW |
760 | if (ifa->flags&IFA_F_TENTATIVE) |
761 | continue; | |
1da177e4 LT |
762 | if (idev->cnf.forwarding) |
763 | addrconf_join_anycast(ifa); | |
764 | else | |
765 | addrconf_leave_anycast(ifa); | |
766 | } | |
f3a1bfb1 ND |
767 | inet6_netconf_notify_devconf(dev_net(dev), NETCONFA_FORWARDING, |
768 | dev->ifindex, &idev->cnf); | |
1da177e4 LT |
769 | } |
770 | ||
771 | ||
e186932b | 772 | static void addrconf_forward_change(struct net *net, __s32 newf) |
1da177e4 LT |
773 | { |
774 | struct net_device *dev; | |
775 | struct inet6_dev *idev; | |
776 | ||
4acd4945 | 777 | for_each_netdev(net, dev) { |
1da177e4 LT |
778 | idev = __in6_dev_get(dev); |
779 | if (idev) { | |
e186932b PE |
780 | int changed = (!idev->cnf.forwarding) ^ (!newf); |
781 | idev->cnf.forwarding = newf; | |
1da177e4 LT |
782 | if (changed) |
783 | dev_forward_change(idev); | |
784 | } | |
1da177e4 | 785 | } |
1da177e4 | 786 | } |
c8fecf22 | 787 | |
013d97e9 | 788 | static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int newf) |
c8fecf22 | 789 | { |
bff16c2f | 790 | struct net *net; |
013d97e9 FR |
791 | int old; |
792 | ||
793 | if (!rtnl_trylock()) | |
794 | return restart_syscall(); | |
bff16c2f PE |
795 | |
796 | net = (struct net *)table->extra2; | |
013d97e9 FR |
797 | old = *p; |
798 | *p = newf; | |
b325fddb | 799 | |
013d97e9 | 800 | if (p == &net->ipv6.devconf_dflt->forwarding) { |
f3a1bfb1 ND |
801 | if ((!newf) ^ (!old)) |
802 | inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING, | |
803 | NETCONFA_IFINDEX_DEFAULT, | |
804 | net->ipv6.devconf_dflt); | |
013d97e9 FR |
805 | rtnl_unlock(); |
806 | return 0; | |
88af182e | 807 | } |
c8fecf22 | 808 | |
e186932b | 809 | if (p == &net->ipv6.devconf_all->forwarding) { |
d26c638c ND |
810 | int old_dflt = net->ipv6.devconf_dflt->forwarding; |
811 | ||
e186932b | 812 | net->ipv6.devconf_dflt->forwarding = newf; |
d26c638c ND |
813 | if ((!newf) ^ (!old_dflt)) |
814 | inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING, | |
815 | NETCONFA_IFINDEX_DEFAULT, | |
816 | net->ipv6.devconf_dflt); | |
817 | ||
e186932b | 818 | addrconf_forward_change(net, newf); |
f3a1bfb1 ND |
819 | if ((!newf) ^ (!old)) |
820 | inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING, | |
821 | NETCONFA_IFINDEX_ALL, | |
822 | net->ipv6.devconf_all); | |
013d97e9 | 823 | } else if ((!newf) ^ (!old)) |
c8fecf22 | 824 | dev_forward_change((struct inet6_dev *)table->extra1); |
0187bdfb | 825 | rtnl_unlock(); |
c8fecf22 | 826 | |
013d97e9 | 827 | if (newf) |
7b4da532 | 828 | rt6_purge_dflt_routers(net); |
b325fddb | 829 | return 1; |
c8fecf22 | 830 | } |
35103d11 AG |
831 | |
832 | static void addrconf_linkdown_change(struct net *net, __s32 newf) | |
833 | { | |
834 | struct net_device *dev; | |
835 | struct inet6_dev *idev; | |
836 | ||
837 | for_each_netdev(net, dev) { | |
838 | idev = __in6_dev_get(dev); | |
839 | if (idev) { | |
840 | int changed = (!idev->cnf.ignore_routes_with_linkdown) ^ (!newf); | |
841 | ||
842 | idev->cnf.ignore_routes_with_linkdown = newf; | |
843 | if (changed) | |
844 | inet6_netconf_notify_devconf(dev_net(dev), | |
845 | NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN, | |
846 | dev->ifindex, | |
847 | &idev->cnf); | |
848 | } | |
849 | } | |
850 | } | |
851 | ||
852 | static int addrconf_fixup_linkdown(struct ctl_table *table, int *p, int newf) | |
853 | { | |
854 | struct net *net; | |
855 | int old; | |
856 | ||
857 | if (!rtnl_trylock()) | |
858 | return restart_syscall(); | |
859 | ||
860 | net = (struct net *)table->extra2; | |
861 | old = *p; | |
862 | *p = newf; | |
863 | ||
864 | if (p == &net->ipv6.devconf_dflt->ignore_routes_with_linkdown) { | |
865 | if ((!newf) ^ (!old)) | |
866 | inet6_netconf_notify_devconf(net, | |
867 | NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN, | |
868 | NETCONFA_IFINDEX_DEFAULT, | |
869 | net->ipv6.devconf_dflt); | |
870 | rtnl_unlock(); | |
871 | return 0; | |
872 | } | |
873 | ||
874 | if (p == &net->ipv6.devconf_all->ignore_routes_with_linkdown) { | |
875 | net->ipv6.devconf_dflt->ignore_routes_with_linkdown = newf; | |
876 | addrconf_linkdown_change(net, newf); | |
877 | if ((!newf) ^ (!old)) | |
878 | inet6_netconf_notify_devconf(net, | |
879 | NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN, | |
880 | NETCONFA_IFINDEX_ALL, | |
881 | net->ipv6.devconf_all); | |
882 | } | |
883 | rtnl_unlock(); | |
884 | ||
885 | return 1; | |
886 | } | |
887 | ||
1da177e4 LT |
888 | #endif |
889 | ||
5c578aed | 890 | /* Nobody refers to this ifaddr, destroy it */ |
1da177e4 LT |
891 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) |
892 | { | |
c2e21293 | 893 | WARN_ON(!hlist_unhashed(&ifp->addr_lst)); |
547b792c | 894 | |
1da177e4 | 895 | #ifdef NET_REFCNT_DEBUG |
91df42be | 896 | pr_debug("%s\n", __func__); |
1da177e4 LT |
897 | #endif |
898 | ||
899 | in6_dev_put(ifp->idev); | |
900 | ||
c15b1cca HFS |
901 | if (cancel_delayed_work(&ifp->dad_work)) |
902 | pr_notice("delayed DAD work was pending while freeing ifa=%p\n", | |
903 | ifp); | |
1da177e4 | 904 | |
e9d3e084 | 905 | if (ifp->state != INET6_IFADDR_STATE_DEAD) { |
f3213831 | 906 | pr_warn("Freeing alive inet6 address %p\n", ifp); |
1da177e4 LT |
907 | return; |
908 | } | |
94e187c0 | 909 | ip6_rt_put(ifp->rt); |
1da177e4 | 910 | |
e5785985 | 911 | kfree_rcu(ifp, rcu); |
1da177e4 LT |
912 | } |
913 | ||
e55ffac6 BH |
914 | static void |
915 | ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp) | |
916 | { | |
502a2ffd | 917 | struct list_head *p; |
8a6ce0c0 | 918 | int ifp_scope = ipv6_addr_src_scope(&ifp->addr); |
e55ffac6 BH |
919 | |
920 | /* | |
921 | * Each device address list is sorted in order of scope - | |
922 | * global before linklocal. | |
923 | */ | |
502a2ffd | 924 | list_for_each(p, &idev->addr_list) { |
925 | struct inet6_ifaddr *ifa | |
926 | = list_entry(p, struct inet6_ifaddr, if_list); | |
8a6ce0c0 | 927 | if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr)) |
e55ffac6 BH |
928 | break; |
929 | } | |
930 | ||
b54c9b98 | 931 | list_add_tail(&ifp->if_list, p); |
e55ffac6 BH |
932 | } |
933 | ||
ddbe5032 | 934 | static u32 inet6_addr_hash(const struct in6_addr *addr) |
3eb84f49 | 935 | { |
ddbe5032 | 936 | return hash_32(ipv6_addr_hash(addr), IN6_ADDR_HSIZE_SHIFT); |
3eb84f49 YH |
937 | } |
938 | ||
1da177e4 LT |
939 | /* On success it returns ifp with increased reference count */ |
940 | ||
941 | static struct inet6_ifaddr * | |
3f8f5298 JP |
942 | ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, |
943 | const struct in6_addr *peer_addr, int pfxlen, | |
8a226b2c | 944 | int scope, u32 flags, u32 valid_lft, u32 prefered_lft) |
1da177e4 LT |
945 | { |
946 | struct inet6_ifaddr *ifa = NULL; | |
947 | struct rt6_info *rt; | |
3a88a81d | 948 | unsigned int hash; |
1da177e4 | 949 | int err = 0; |
d68b8270 YH |
950 | int addr_type = ipv6_addr_type(addr); |
951 | ||
952 | if (addr_type == IPV6_ADDR_ANY || | |
953 | addr_type & IPV6_ADDR_MULTICAST || | |
954 | (!(idev->dev->flags & IFF_LOOPBACK) && | |
955 | addr_type & IPV6_ADDR_LOOPBACK)) | |
956 | return ERR_PTR(-EADDRNOTAVAIL); | |
1da177e4 | 957 | |
8814c4b5 | 958 | rcu_read_lock_bh(); |
1da177e4 LT |
959 | if (idev->dead) { |
960 | err = -ENODEV; /*XXX*/ | |
961 | goto out2; | |
962 | } | |
963 | ||
56d417b1 | 964 | if (idev->cnf.disable_ipv6) { |
9bdd8d40 BH |
965 | err = -EACCES; |
966 | goto out2; | |
967 | } | |
968 | ||
5c578aed | 969 | spin_lock(&addrconf_hash_lock); |
1da177e4 LT |
970 | |
971 | /* Ignore adding duplicate addresses on an interface */ | |
c346dca1 | 972 | if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) { |
ba3542e1 | 973 | ADBG("ipv6_add_addr: already assigned\n"); |
1da177e4 LT |
974 | err = -EEXIST; |
975 | goto out; | |
976 | } | |
977 | ||
322f74a4 | 978 | ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); |
1da177e4 | 979 | |
63159f29 | 980 | if (!ifa) { |
ba3542e1 | 981 | ADBG("ipv6_add_addr: malloc failed\n"); |
1da177e4 LT |
982 | err = -ENOBUFS; |
983 | goto out; | |
984 | } | |
985 | ||
8f031519 | 986 | rt = addrconf_dst_alloc(idev, addr, false); |
1da177e4 LT |
987 | if (IS_ERR(rt)) { |
988 | err = PTR_ERR(rt); | |
989 | goto out; | |
990 | } | |
991 | ||
bba24896 JP |
992 | neigh_parms_data_state_setall(idev->nd_parms); |
993 | ||
4e3fd7a0 | 994 | ifa->addr = *addr; |
3f8f5298 JP |
995 | if (peer_addr) |
996 | ifa->peer_addr = *peer_addr; | |
1da177e4 LT |
997 | |
998 | spin_lock_init(&ifa->lock); | |
c15b1cca | 999 | INIT_DELAYED_WORK(&ifa->dad_work, addrconf_dad_work); |
c2e21293 | 1000 | INIT_HLIST_NODE(&ifa->addr_lst); |
1da177e4 LT |
1001 | ifa->scope = scope; |
1002 | ifa->prefix_len = pfxlen; | |
1003 | ifa->flags = flags | IFA_F_TENTATIVE; | |
8a226b2c JB |
1004 | ifa->valid_lft = valid_lft; |
1005 | ifa->prefered_lft = prefered_lft; | |
1da177e4 | 1006 | ifa->cstamp = ifa->tstamp = jiffies; |
617fe29d | 1007 | ifa->tokenized = false; |
1da177e4 | 1008 | |
57f5f544 KF |
1009 | ifa->rt = rt; |
1010 | ||
1da177e4 LT |
1011 | ifa->idev = idev; |
1012 | in6_dev_hold(idev); | |
1013 | /* For caller */ | |
1014 | in6_ifa_hold(ifa); | |
1015 | ||
1016 | /* Add to big hash table */ | |
ddbe5032 | 1017 | hash = inet6_addr_hash(addr); |
1da177e4 | 1018 | |
5c578aed | 1019 | hlist_add_head_rcu(&ifa->addr_lst, &inet6_addr_lst[hash]); |
5c578aed | 1020 | spin_unlock(&addrconf_hash_lock); |
1da177e4 LT |
1021 | |
1022 | write_lock(&idev->lock); | |
1023 | /* Add to inet6_dev unicast addr list. */ | |
e55ffac6 | 1024 | ipv6_link_dev_addr(idev, ifa); |
1da177e4 | 1025 | |
1da177e4 | 1026 | if (ifa->flags&IFA_F_TEMPORARY) { |
372e6c8f | 1027 | list_add(&ifa->tmp_list, &idev->tempaddr_list); |
1da177e4 LT |
1028 | in6_ifa_hold(ifa); |
1029 | } | |
1da177e4 | 1030 | |
1da177e4 LT |
1031 | in6_ifa_hold(ifa); |
1032 | write_unlock(&idev->lock); | |
1033 | out2: | |
8814c4b5 | 1034 | rcu_read_unlock_bh(); |
1da177e4 | 1035 | |
fd92833a | 1036 | if (likely(err == 0)) |
f88c91dd | 1037 | inet6addr_notifier_call_chain(NETDEV_UP, ifa); |
1da177e4 LT |
1038 | else { |
1039 | kfree(ifa); | |
1040 | ifa = ERR_PTR(err); | |
1041 | } | |
1042 | ||
1043 | return ifa; | |
1044 | out: | |
5c578aed | 1045 | spin_unlock(&addrconf_hash_lock); |
1da177e4 LT |
1046 | goto out2; |
1047 | } | |
1048 | ||
5b84efec TH |
1049 | enum cleanup_prefix_rt_t { |
1050 | CLEANUP_PREFIX_RT_NOP, /* no cleanup action for prefix route */ | |
1051 | CLEANUP_PREFIX_RT_DEL, /* delete the prefix route */ | |
1052 | CLEANUP_PREFIX_RT_EXPIRE, /* update the lifetime of the prefix route */ | |
1053 | }; | |
1054 | ||
1055 | /* | |
1056 | * Check, whether the prefix for ifp would still need a prefix route | |
1057 | * after deleting ifp. The function returns one of the CLEANUP_PREFIX_RT_* | |
1058 | * constants. | |
1059 | * | |
1060 | * 1) we don't purge prefix if address was not permanent. | |
1061 | * prefix is managed by its own lifetime. | |
1062 | * 2) we also don't purge, if the address was IFA_F_NOPREFIXROUTE. | |
1063 | * 3) if there are no addresses, delete prefix. | |
1064 | * 4) if there are still other permanent address(es), | |
1065 | * corresponding prefix is still permanent. | |
1066 | * 5) if there are still other addresses with IFA_F_NOPREFIXROUTE, | |
1067 | * don't purge the prefix, assume user space is managing it. | |
1068 | * 6) otherwise, update prefix lifetime to the | |
1069 | * longest valid lifetime among the corresponding | |
1070 | * addresses on the device. | |
1071 | * Note: subsequent RA will update lifetime. | |
1072 | **/ | |
1073 | static enum cleanup_prefix_rt_t | |
1074 | check_cleanup_prefix_route(struct inet6_ifaddr *ifp, unsigned long *expires) | |
1075 | { | |
1076 | struct inet6_ifaddr *ifa; | |
1077 | struct inet6_dev *idev = ifp->idev; | |
1078 | unsigned long lifetime; | |
1079 | enum cleanup_prefix_rt_t action = CLEANUP_PREFIX_RT_DEL; | |
1080 | ||
1081 | *expires = jiffies; | |
1082 | ||
1083 | list_for_each_entry(ifa, &idev->addr_list, if_list) { | |
1084 | if (ifa == ifp) | |
1085 | continue; | |
1086 | if (!ipv6_prefix_equal(&ifa->addr, &ifp->addr, | |
1087 | ifp->prefix_len)) | |
1088 | continue; | |
1089 | if (ifa->flags & (IFA_F_PERMANENT | IFA_F_NOPREFIXROUTE)) | |
1090 | return CLEANUP_PREFIX_RT_NOP; | |
1091 | ||
1092 | action = CLEANUP_PREFIX_RT_EXPIRE; | |
1093 | ||
1094 | spin_lock(&ifa->lock); | |
1095 | ||
1096 | lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ); | |
1097 | /* | |
1098 | * Note: Because this address is | |
1099 | * not permanent, lifetime < | |
1100 | * LONG_MAX / HZ here. | |
1101 | */ | |
1102 | if (time_before(*expires, ifa->tstamp + lifetime * HZ)) | |
1103 | *expires = ifa->tstamp + lifetime * HZ; | |
1104 | spin_unlock(&ifa->lock); | |
1105 | } | |
1106 | ||
1107 | return action; | |
1108 | } | |
1109 | ||
1110 | static void | |
1111 | cleanup_prefix_route(struct inet6_ifaddr *ifp, unsigned long expires, bool del_rt) | |
1112 | { | |
1113 | struct rt6_info *rt; | |
1114 | ||
1115 | rt = addrconf_get_prefix_route(&ifp->addr, | |
1116 | ifp->prefix_len, | |
1117 | ifp->idev->dev, | |
1118 | 0, RTF_GATEWAY | RTF_DEFAULT); | |
1119 | if (rt) { | |
1120 | if (del_rt) | |
1121 | ip6_del_rt(rt); | |
1122 | else { | |
1123 | if (!(rt->rt6i_flags & RTF_EXPIRES)) | |
1124 | rt6_set_expires(rt, expires); | |
1125 | ip6_rt_put(rt); | |
1126 | } | |
1127 | } | |
1128 | } | |
1129 | ||
1130 | ||
1da177e4 LT |
1131 | /* This function wants to get referenced ifp and releases it before return */ |
1132 | ||
1133 | static void ipv6_del_addr(struct inet6_ifaddr *ifp) | |
1134 | { | |
4c5ff6a6 | 1135 | int state; |
5b84efec TH |
1136 | enum cleanup_prefix_rt_t action = CLEANUP_PREFIX_RT_NOP; |
1137 | unsigned long expires; | |
1da177e4 | 1138 | |
c15b1cca HFS |
1139 | ASSERT_RTNL(); |
1140 | ||
8e8e676d | 1141 | spin_lock_bh(&ifp->lock); |
4c5ff6a6 | 1142 | state = ifp->state; |
e9d3e084 | 1143 | ifp->state = INET6_IFADDR_STATE_DEAD; |
8e8e676d | 1144 | spin_unlock_bh(&ifp->lock); |
4c5ff6a6 HX |
1145 | |
1146 | if (state == INET6_IFADDR_STATE_DEAD) | |
1147 | goto out; | |
1da177e4 | 1148 | |
5c578aed | 1149 | spin_lock_bh(&addrconf_hash_lock); |
1150 | hlist_del_init_rcu(&ifp->addr_lst); | |
5c578aed | 1151 | spin_unlock_bh(&addrconf_hash_lock); |
1da177e4 | 1152 | |
5b84efec | 1153 | write_lock_bh(&ifp->idev->lock); |
5d9efa7e | 1154 | |
1da177e4 | 1155 | if (ifp->flags&IFA_F_TEMPORARY) { |
372e6c8f | 1156 | list_del(&ifp->tmp_list); |
1157 | if (ifp->ifpub) { | |
1158 | in6_ifa_put(ifp->ifpub); | |
1159 | ifp->ifpub = NULL; | |
1da177e4 | 1160 | } |
372e6c8f | 1161 | __in6_ifa_put(ifp); |
1da177e4 | 1162 | } |
1da177e4 | 1163 | |
5b84efec TH |
1164 | if (ifp->flags & IFA_F_PERMANENT && !(ifp->flags & IFA_F_NOPREFIXROUTE)) |
1165 | action = check_cleanup_prefix_route(ifp, &expires); | |
502a2ffd | 1166 | |
5b84efec TH |
1167 | list_del_init(&ifp->if_list); |
1168 | __in6_ifa_put(ifp); | |
1169 | ||
1170 | write_unlock_bh(&ifp->idev->lock); | |
1da177e4 | 1171 | |
c15b1cca | 1172 | addrconf_del_dad_work(ifp); |
b2238566 | 1173 | |
1da177e4 LT |
1174 | ipv6_ifa_notify(RTM_DELADDR, ifp); |
1175 | ||
f88c91dd | 1176 | inet6addr_notifier_call_chain(NETDEV_DOWN, ifp); |
1da177e4 | 1177 | |
5b84efec TH |
1178 | if (action != CLEANUP_PREFIX_RT_NOP) { |
1179 | cleanup_prefix_route(ifp, expires, | |
1180 | action == CLEANUP_PREFIX_RT_DEL); | |
1da177e4 LT |
1181 | } |
1182 | ||
c3968a85 DW |
1183 | /* clean up prefsrc entries */ |
1184 | rt6_remove_prefsrc(ifp); | |
4c5ff6a6 | 1185 | out: |
1da177e4 LT |
1186 | in6_ifa_put(ifp); |
1187 | } | |
1188 | ||
1da177e4 LT |
1189 | static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift) |
1190 | { | |
1191 | struct inet6_dev *idev = ifp->idev; | |
1192 | struct in6_addr addr, *tmpaddr; | |
76f793e3 | 1193 | unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_tstamp, age; |
eac55bf9 | 1194 | unsigned long regen_advance; |
1da177e4 LT |
1195 | int tmp_plen; |
1196 | int ret = 0; | |
95c385b4 | 1197 | u32 addr_flags; |
76f793e3 | 1198 | unsigned long now = jiffies; |
76506a98 | 1199 | long max_desync_factor; |
7aa8e63f | 1200 | s32 cnf_temp_preferred_lft; |
1da177e4 | 1201 | |
53bd6749 | 1202 | write_lock_bh(&idev->lock); |
1da177e4 LT |
1203 | if (ift) { |
1204 | spin_lock_bh(&ift->lock); | |
1205 | memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8); | |
1206 | spin_unlock_bh(&ift->lock); | |
1207 | tmpaddr = &addr; | |
1208 | } else { | |
1209 | tmpaddr = NULL; | |
1210 | } | |
1211 | retry: | |
1212 | in6_dev_hold(idev); | |
1213 | if (idev->cnf.use_tempaddr <= 0) { | |
53bd6749 | 1214 | write_unlock_bh(&idev->lock); |
f3213831 | 1215 | pr_info("%s: use_tempaddr is disabled\n", __func__); |
1da177e4 LT |
1216 | in6_dev_put(idev); |
1217 | ret = -1; | |
1218 | goto out; | |
1219 | } | |
1220 | spin_lock_bh(&ifp->lock); | |
1221 | if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { | |
1222 | idev->cnf.use_tempaddr = -1; /*XXX*/ | |
1223 | spin_unlock_bh(&ifp->lock); | |
53bd6749 | 1224 | write_unlock_bh(&idev->lock); |
f3213831 JP |
1225 | pr_warn("%s: regeneration time exceeded - disabled temporary address support\n", |
1226 | __func__); | |
1da177e4 LT |
1227 | in6_dev_put(idev); |
1228 | ret = -1; | |
1229 | goto out; | |
1230 | } | |
1231 | in6_ifa_hold(ifp); | |
1232 | memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); | |
9d6280da | 1233 | ipv6_try_regen_rndid(idev, tmpaddr); |
1da177e4 | 1234 | memcpy(&addr.s6_addr[8], idev->rndid, 8); |
76f793e3 | 1235 | age = (now - ifp->tstamp) / HZ; |
76506a98 JB |
1236 | |
1237 | regen_advance = idev->cnf.regen_max_retry * | |
1238 | idev->cnf.dad_transmits * | |
1239 | NEIGH_VAR(idev->nd_parms, RETRANS_TIME) / HZ; | |
1240 | ||
1241 | /* recalculate max_desync_factor each time and update | |
1242 | * idev->desync_factor if it's larger | |
1243 | */ | |
7aa8e63f | 1244 | cnf_temp_preferred_lft = READ_ONCE(idev->cnf.temp_prefered_lft); |
76506a98 JB |
1245 | max_desync_factor = min_t(__u32, |
1246 | idev->cnf.max_desync_factor, | |
7aa8e63f | 1247 | cnf_temp_preferred_lft - regen_advance); |
76506a98 JB |
1248 | |
1249 | if (unlikely(idev->desync_factor > max_desync_factor)) { | |
1250 | if (max_desync_factor > 0) { | |
1251 | get_random_bytes(&idev->desync_factor, | |
1252 | sizeof(idev->desync_factor)); | |
1253 | idev->desync_factor %= max_desync_factor; | |
1254 | } else { | |
1255 | idev->desync_factor = 0; | |
1256 | } | |
1257 | } | |
1258 | ||
1da177e4 LT |
1259 | tmp_valid_lft = min_t(__u32, |
1260 | ifp->valid_lft, | |
7a876b0e | 1261 | idev->cnf.temp_valid_lft + age); |
7aa8e63f | 1262 | tmp_prefered_lft = cnf_temp_preferred_lft + age - |
76506a98 | 1263 | idev->desync_factor; |
76506a98 | 1264 | tmp_prefered_lft = min_t(__u32, ifp->prefered_lft, tmp_prefered_lft); |
1da177e4 | 1265 | tmp_plen = ifp->prefix_len; |
1da177e4 LT |
1266 | tmp_tstamp = ifp->tstamp; |
1267 | spin_unlock_bh(&ifp->lock); | |
1268 | ||
53bd6749 | 1269 | write_unlock_bh(&idev->lock); |
95c385b4 | 1270 | |
eac55bf9 BB |
1271 | /* A temporary address is created only if this calculated Preferred |
1272 | * Lifetime is greater than REGEN_ADVANCE time units. In particular, | |
1273 | * an implementation must not create a temporary address with a zero | |
1274 | * Preferred Lifetime. | |
ecab6701 HK |
1275 | * Use age calculation as in addrconf_verify to avoid unnecessary |
1276 | * temporary addresses being generated. | |
eac55bf9 | 1277 | */ |
ecab6701 HK |
1278 | age = (now - tmp_tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ; |
1279 | if (tmp_prefered_lft <= regen_advance + age) { | |
eac55bf9 BB |
1280 | in6_ifa_put(ifp); |
1281 | in6_dev_put(idev); | |
1282 | ret = -1; | |
1283 | goto out; | |
1284 | } | |
1285 | ||
95c385b4 NH |
1286 | addr_flags = IFA_F_TEMPORARY; |
1287 | /* set in addrconf_prefix_rcv() */ | |
1288 | if (ifp->flags & IFA_F_OPTIMISTIC) | |
1289 | addr_flags |= IFA_F_OPTIMISTIC; | |
1290 | ||
4b08a8f1 HFS |
1291 | ift = ipv6_add_addr(idev, &addr, NULL, tmp_plen, |
1292 | ipv6_addr_scope(&addr), addr_flags, | |
1293 | tmp_valid_lft, tmp_prefered_lft); | |
1294 | if (IS_ERR(ift)) { | |
1da177e4 LT |
1295 | in6_ifa_put(ifp); |
1296 | in6_dev_put(idev); | |
f3213831 | 1297 | pr_info("%s: retry temporary address regeneration\n", __func__); |
1da177e4 | 1298 | tmpaddr = &addr; |
53bd6749 | 1299 | write_lock_bh(&idev->lock); |
1da177e4 LT |
1300 | goto retry; |
1301 | } | |
1302 | ||
1303 | spin_lock_bh(&ift->lock); | |
1304 | ift->ifpub = ifp; | |
76f793e3 | 1305 | ift->cstamp = now; |
1da177e4 LT |
1306 | ift->tstamp = tmp_tstamp; |
1307 | spin_unlock_bh(&ift->lock); | |
1308 | ||
cf22f9a2 | 1309 | addrconf_dad_start(ift); |
1da177e4 LT |
1310 | in6_ifa_put(ift); |
1311 | in6_dev_put(idev); | |
1312 | out: | |
1313 | return ret; | |
1314 | } | |
1da177e4 LT |
1315 | |
1316 | /* | |
072047e4 | 1317 | * Choose an appropriate source address (RFC3484) |
1da177e4 | 1318 | */ |
a9b05723 YH |
1319 | enum { |
1320 | IPV6_SADDR_RULE_INIT = 0, | |
1321 | IPV6_SADDR_RULE_LOCAL, | |
1322 | IPV6_SADDR_RULE_SCOPE, | |
1323 | IPV6_SADDR_RULE_PREFERRED, | |
1324 | #ifdef CONFIG_IPV6_MIP6 | |
1325 | IPV6_SADDR_RULE_HOA, | |
1326 | #endif | |
1327 | IPV6_SADDR_RULE_OIF, | |
1328 | IPV6_SADDR_RULE_LABEL, | |
a9b05723 | 1329 | IPV6_SADDR_RULE_PRIVACY, |
a9b05723 YH |
1330 | IPV6_SADDR_RULE_ORCHID, |
1331 | IPV6_SADDR_RULE_PREFIX, | |
7fd2561e EK |
1332 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
1333 | IPV6_SADDR_RULE_NOT_OPTIMISTIC, | |
1334 | #endif | |
a9b05723 YH |
1335 | IPV6_SADDR_RULE_MAX |
1336 | }; | |
1337 | ||
072047e4 | 1338 | struct ipv6_saddr_score { |
a9b05723 YH |
1339 | int rule; |
1340 | int addr_type; | |
1341 | struct inet6_ifaddr *ifa; | |
1342 | DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX); | |
1343 | int scopedist; | |
1344 | int matchlen; | |
072047e4 YH |
1345 | }; |
1346 | ||
a9b05723 | 1347 | struct ipv6_saddr_dst { |
9acd9f3a | 1348 | const struct in6_addr *addr; |
a9b05723 YH |
1349 | int ifindex; |
1350 | int scope; | |
1351 | int label; | |
7cbca67c | 1352 | unsigned int prefs; |
a9b05723 | 1353 | }; |
072047e4 | 1354 | |
b6f99a21 | 1355 | static inline int ipv6_saddr_preferred(int type) |
1da177e4 | 1356 | { |
45bb0060 | 1357 | if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|IPV6_ADDR_LOOPBACK)) |
072047e4 YH |
1358 | return 1; |
1359 | return 0; | |
1da177e4 LT |
1360 | } |
1361 | ||
7fd2561e EK |
1362 | static inline bool ipv6_use_optimistic_addr(struct inet6_dev *idev) |
1363 | { | |
1364 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
1365 | return idev && idev->cnf.optimistic_dad && idev->cnf.use_optimistic; | |
1366 | #else | |
1367 | return false; | |
1368 | #endif | |
1369 | } | |
1370 | ||
3de23255 BT |
1371 | static int ipv6_get_saddr_eval(struct net *net, |
1372 | struct ipv6_saddr_score *score, | |
a9b05723 YH |
1373 | struct ipv6_saddr_dst *dst, |
1374 | int i) | |
1375 | { | |
1376 | int ret; | |
1377 | ||
1378 | if (i <= score->rule) { | |
1379 | switch (i) { | |
1380 | case IPV6_SADDR_RULE_SCOPE: | |
1381 | ret = score->scopedist; | |
1382 | break; | |
1383 | case IPV6_SADDR_RULE_PREFIX: | |
1384 | ret = score->matchlen; | |
1385 | break; | |
1386 | default: | |
1387 | ret = !!test_bit(i, score->scorebits); | |
1388 | } | |
1389 | goto out; | |
1390 | } | |
1391 | ||
1392 | switch (i) { | |
1393 | case IPV6_SADDR_RULE_INIT: | |
1394 | /* Rule 0: remember if hiscore is not ready yet */ | |
1395 | ret = !!score->ifa; | |
1396 | break; | |
1397 | case IPV6_SADDR_RULE_LOCAL: | |
1398 | /* Rule 1: Prefer same address */ | |
1399 | ret = ipv6_addr_equal(&score->ifa->addr, dst->addr); | |
1400 | break; | |
1401 | case IPV6_SADDR_RULE_SCOPE: | |
1402 | /* Rule 2: Prefer appropriate scope | |
1403 | * | |
1404 | * ret | |
1405 | * ^ | |
1406 | * -1 | d 15 | |
1407 | * ---+--+-+---> scope | |
1408 | * | | |
1409 | * | d is scope of the destination. | |
1410 | * B-d | \ | |
1411 | * | \ <- smaller scope is better if | |
db9c7c39 | 1412 | * B-15 | \ if scope is enough for destination. |
a9b05723 YH |
1413 | * | ret = B - scope (-1 <= scope >= d <= 15). |
1414 | * d-C-1 | / | |
1415 | * |/ <- greater is better | |
1416 | * -C / if scope is not enough for destination. | |
1417 | * /| ret = scope - C (-1 <= d < scope <= 15). | |
1418 | * | |
1419 | * d - C - 1 < B -15 (for all -1 <= d <= 15). | |
1420 | * C > d + 14 - B >= 15 + 14 - B = 29 - B. | |
1421 | * Assume B = 0 and we get C > 29. | |
1422 | */ | |
1423 | ret = __ipv6_addr_src_scope(score->addr_type); | |
1424 | if (ret >= dst->scope) | |
1425 | ret = -ret; | |
1426 | else | |
1427 | ret -= 128; /* 30 is enough */ | |
1428 | score->scopedist = ret; | |
1429 | break; | |
1430 | case IPV6_SADDR_RULE_PREFERRED: | |
7fd2561e | 1431 | { |
a9b05723 | 1432 | /* Rule 3: Avoid deprecated and optimistic addresses */ |
7fd2561e EK |
1433 | u8 avoid = IFA_F_DEPRECATED; |
1434 | ||
1435 | if (!ipv6_use_optimistic_addr(score->ifa->idev)) | |
1436 | avoid |= IFA_F_OPTIMISTIC; | |
a9b05723 | 1437 | ret = ipv6_saddr_preferred(score->addr_type) || |
7fd2561e | 1438 | !(score->ifa->flags & avoid); |
a9b05723 | 1439 | break; |
7fd2561e | 1440 | } |
a9b05723 YH |
1441 | #ifdef CONFIG_IPV6_MIP6 |
1442 | case IPV6_SADDR_RULE_HOA: | |
7cbca67c | 1443 | { |
a9b05723 | 1444 | /* Rule 4: Prefer home address */ |
7cbca67c YH |
1445 | int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA); |
1446 | ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome; | |
a9b05723 | 1447 | break; |
7cbca67c | 1448 | } |
a9b05723 YH |
1449 | #endif |
1450 | case IPV6_SADDR_RULE_OIF: | |
1451 | /* Rule 5: Prefer outgoing interface */ | |
1452 | ret = (!dst->ifindex || | |
1453 | dst->ifindex == score->ifa->idev->dev->ifindex); | |
1454 | break; | |
1455 | case IPV6_SADDR_RULE_LABEL: | |
1456 | /* Rule 6: Prefer matching label */ | |
3de23255 BT |
1457 | ret = ipv6_addr_label(net, |
1458 | &score->ifa->addr, score->addr_type, | |
a9b05723 YH |
1459 | score->ifa->idev->dev->ifindex) == dst->label; |
1460 | break; | |
a9b05723 | 1461 | case IPV6_SADDR_RULE_PRIVACY: |
7cbca67c | 1462 | { |
a9b05723 | 1463 | /* Rule 7: Prefer public address |
25985edc | 1464 | * Note: prefer temporary address if use_tempaddr >= 2 |
a9b05723 | 1465 | */ |
7cbca67c YH |
1466 | int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ? |
1467 | !!(dst->prefs & IPV6_PREFER_SRC_TMP) : | |
1468 | score->ifa->idev->cnf.use_tempaddr >= 2; | |
1469 | ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp; | |
a9b05723 | 1470 | break; |
7cbca67c | 1471 | } |
a9b05723 YH |
1472 | case IPV6_SADDR_RULE_ORCHID: |
1473 | /* Rule 8-: Prefer ORCHID vs ORCHID or | |
1474 | * non-ORCHID vs non-ORCHID | |
1475 | */ | |
1476 | ret = !(ipv6_addr_orchid(&score->ifa->addr) ^ | |
1477 | ipv6_addr_orchid(dst->addr)); | |
1478 | break; | |
1479 | case IPV6_SADDR_RULE_PREFIX: | |
1480 | /* Rule 8: Use longest matching prefix */ | |
91b4b04f YH |
1481 | ret = ipv6_addr_diff(&score->ifa->addr, dst->addr); |
1482 | if (ret > score->ifa->prefix_len) | |
1483 | ret = score->ifa->prefix_len; | |
1484 | score->matchlen = ret; | |
a9b05723 | 1485 | break; |
7fd2561e EK |
1486 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
1487 | case IPV6_SADDR_RULE_NOT_OPTIMISTIC: | |
1488 | /* Optimistic addresses still have lower precedence than other | |
1489 | * preferred addresses. | |
1490 | */ | |
1491 | ret = !(score->ifa->flags & IFA_F_OPTIMISTIC); | |
1492 | break; | |
1493 | #endif | |
a9b05723 YH |
1494 | default: |
1495 | ret = 0; | |
1496 | } | |
1497 | ||
1498 | if (ret) | |
1499 | __set_bit(i, score->scorebits); | |
1500 | score->rule = i; | |
1501 | out: | |
1502 | return ret; | |
1503 | } | |
1504 | ||
c0b8da1e YH |
1505 | static int __ipv6_dev_get_saddr(struct net *net, |
1506 | struct ipv6_saddr_dst *dst, | |
c0b8da1e YH |
1507 | struct inet6_dev *idev, |
1508 | struct ipv6_saddr_score *scores, | |
1509 | int hiscore_idx) | |
9131f3de | 1510 | { |
c0b8da1e | 1511 | struct ipv6_saddr_score *score = &scores[1 - hiscore_idx], *hiscore = &scores[hiscore_idx]; |
9131f3de YH |
1512 | |
1513 | read_lock_bh(&idev->lock); | |
1514 | list_for_each_entry(score->ifa, &idev->addr_list, if_list) { | |
1515 | int i; | |
1516 | ||
1517 | /* | |
1518 | * - Tentative Address (RFC2462 section 5.4) | |
1519 | * - A tentative address is not considered | |
1520 | * "assigned to an interface" in the traditional | |
1521 | * sense, unless it is also flagged as optimistic. | |
1522 | * - Candidate Source Address (section 4) | |
1523 | * - In any case, anycast addresses, multicast | |
1524 | * addresses, and the unspecified address MUST | |
1525 | * NOT be included in a candidate set. | |
1526 | */ | |
1527 | if ((score->ifa->flags & IFA_F_TENTATIVE) && | |
1528 | (!(score->ifa->flags & IFA_F_OPTIMISTIC))) | |
1529 | continue; | |
1530 | ||
1531 | score->addr_type = __ipv6_addr_type(&score->ifa->addr); | |
1532 | ||
1533 | if (unlikely(score->addr_type == IPV6_ADDR_ANY || | |
1534 | score->addr_type & IPV6_ADDR_MULTICAST)) { | |
1535 | net_dbg_ratelimited("ADDRCONF: unspecified / multicast address assigned as unicast address on %s", | |
1536 | idev->dev->name); | |
1537 | continue; | |
1538 | } | |
1539 | ||
1540 | score->rule = -1; | |
1541 | bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX); | |
1542 | ||
1543 | for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) { | |
1544 | int minihiscore, miniscore; | |
1545 | ||
1546 | minihiscore = ipv6_get_saddr_eval(net, hiscore, dst, i); | |
1547 | miniscore = ipv6_get_saddr_eval(net, score, dst, i); | |
1548 | ||
1549 | if (minihiscore > miniscore) { | |
1550 | if (i == IPV6_SADDR_RULE_SCOPE && | |
1551 | score->scopedist > 0) { | |
1552 | /* | |
1553 | * special case: | |
1554 | * each remaining entry | |
1555 | * has too small (not enough) | |
1556 | * scope, because ifa entries | |
1557 | * are sorted by their scope | |
1558 | * values. | |
1559 | */ | |
1560 | goto out; | |
1561 | } | |
1562 | break; | |
1563 | } else if (minihiscore < miniscore) { | |
1564 | if (hiscore->ifa) | |
1565 | in6_ifa_put(hiscore->ifa); | |
1566 | ||
1567 | in6_ifa_hold(score->ifa); | |
1568 | ||
1569 | swap(hiscore, score); | |
c0b8da1e | 1570 | hiscore_idx = 1 - hiscore_idx; |
9131f3de YH |
1571 | |
1572 | /* restore our iterator */ | |
1573 | score->ifa = hiscore->ifa; | |
1574 | ||
1575 | break; | |
1576 | } | |
1577 | } | |
1578 | } | |
1579 | out: | |
1580 | read_unlock_bh(&idev->lock); | |
c0b8da1e | 1581 | return hiscore_idx; |
9131f3de YH |
1582 | } |
1583 | ||
afbac601 DA |
1584 | static int ipv6_get_saddr_master(struct net *net, |
1585 | const struct net_device *dst_dev, | |
1586 | const struct net_device *master, | |
1587 | struct ipv6_saddr_dst *dst, | |
1588 | struct ipv6_saddr_score *scores, | |
1589 | int hiscore_idx) | |
1590 | { | |
1591 | struct inet6_dev *idev; | |
1592 | ||
1593 | idev = __in6_dev_get(dst_dev); | |
1594 | if (idev) | |
1595 | hiscore_idx = __ipv6_dev_get_saddr(net, dst, idev, | |
1596 | scores, hiscore_idx); | |
1597 | ||
1598 | idev = __in6_dev_get(master); | |
1599 | if (idev) | |
1600 | hiscore_idx = __ipv6_dev_get_saddr(net, dst, idev, | |
1601 | scores, hiscore_idx); | |
1602 | ||
1603 | return hiscore_idx; | |
1604 | } | |
1605 | ||
b3f644fc | 1606 | int ipv6_dev_get_saddr(struct net *net, const struct net_device *dst_dev, |
9acd9f3a | 1607 | const struct in6_addr *daddr, unsigned int prefs, |
7cbca67c | 1608 | struct in6_addr *saddr) |
1da177e4 | 1609 | { |
c0b8da1e | 1610 | struct ipv6_saddr_score scores[2], *hiscore; |
a9b05723 | 1611 | struct ipv6_saddr_dst dst; |
9131f3de | 1612 | struct inet6_dev *idev; |
072047e4 | 1613 | struct net_device *dev; |
a9b05723 | 1614 | int dst_type; |
9131f3de | 1615 | bool use_oif_addr = false; |
c0b8da1e | 1616 | int hiscore_idx = 0; |
1da177e4 | 1617 | |
a9b05723 YH |
1618 | dst_type = __ipv6_addr_type(daddr); |
1619 | dst.addr = daddr; | |
1620 | dst.ifindex = dst_dev ? dst_dev->ifindex : 0; | |
1621 | dst.scope = __ipv6_addr_src_scope(dst_type); | |
3de23255 | 1622 | dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex); |
7cbca67c | 1623 | dst.prefs = prefs; |
a9b05723 | 1624 | |
c0b8da1e YH |
1625 | scores[hiscore_idx].rule = -1; |
1626 | scores[hiscore_idx].ifa = NULL; | |
1da177e4 | 1627 | |
8814c4b5 | 1628 | rcu_read_lock(); |
1da177e4 | 1629 | |
9131f3de YH |
1630 | /* Candidate Source Address (section 4) |
1631 | * - multicast and link-local destination address, | |
1632 | * the set of candidate source address MUST only | |
1633 | * include addresses assigned to interfaces | |
1634 | * belonging to the same link as the outgoing | |
1635 | * interface. | |
1636 | * (- For site-local destination addresses, the | |
1637 | * set of candidate source addresses MUST only | |
1638 | * include addresses assigned to interfaces | |
1639 | * belonging to the same site as the outgoing | |
1640 | * interface.) | |
3985e8a3 EK |
1641 | * - "It is RECOMMENDED that the candidate source addresses |
1642 | * be the set of unicast addresses assigned to the | |
1643 | * interface that will be used to send to the destination | |
1644 | * (the 'outgoing' interface)." (RFC 6724) | |
9131f3de YH |
1645 | */ |
1646 | if (dst_dev) { | |
3985e8a3 | 1647 | idev = __in6_dev_get(dst_dev); |
9131f3de | 1648 | if ((dst_type & IPV6_ADDR_MULTICAST) || |
3985e8a3 EK |
1649 | dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL || |
1650 | (idev && idev->cnf.use_oif_addrs_only)) { | |
9131f3de YH |
1651 | use_oif_addr = true; |
1652 | } | |
1653 | } | |
a9b05723 | 1654 | |
9131f3de | 1655 | if (use_oif_addr) { |
c0b8da1e | 1656 | if (idev) |
c15df306 | 1657 | hiscore_idx = __ipv6_dev_get_saddr(net, &dst, idev, scores, hiscore_idx); |
9131f3de | 1658 | } else { |
afbac601 DA |
1659 | const struct net_device *master; |
1660 | int master_idx = 0; | |
1661 | ||
1662 | /* if dst_dev exists and is enslaved to an L3 device, then | |
1663 | * prefer addresses from dst_dev and then the master over | |
1664 | * any other enslaved devices in the L3 domain. | |
1665 | */ | |
1666 | master = l3mdev_master_dev_rcu(dst_dev); | |
1667 | if (master) { | |
1668 | master_idx = master->ifindex; | |
1669 | ||
1670 | hiscore_idx = ipv6_get_saddr_master(net, dst_dev, | |
1671 | master, &dst, | |
1672 | scores, hiscore_idx); | |
1673 | ||
1674 | if (scores[hiscore_idx].ifa) | |
1675 | goto out; | |
1676 | } | |
1677 | ||
9131f3de | 1678 | for_each_netdev_rcu(net, dev) { |
afbac601 DA |
1679 | /* only consider addresses on devices in the |
1680 | * same L3 domain | |
1681 | */ | |
1682 | if (l3mdev_master_ifindex_rcu(dev) != master_idx) | |
1683 | continue; | |
9131f3de YH |
1684 | idev = __in6_dev_get(dev); |
1685 | if (!idev) | |
072047e4 | 1686 | continue; |
c15df306 | 1687 | hiscore_idx = __ipv6_dev_get_saddr(net, &dst, idev, scores, hiscore_idx); |
1da177e4 LT |
1688 | } |
1689 | } | |
afbac601 DA |
1690 | |
1691 | out: | |
8814c4b5 | 1692 | rcu_read_unlock(); |
1da177e4 | 1693 | |
c0b8da1e | 1694 | hiscore = &scores[hiscore_idx]; |
a9b05723 | 1695 | if (!hiscore->ifa) |
072047e4 | 1696 | return -EADDRNOTAVAIL; |
1ab1457c | 1697 | |
4e3fd7a0 | 1698 | *saddr = hiscore->ifa->addr; |
a9b05723 | 1699 | in6_ifa_put(hiscore->ifa); |
072047e4 | 1700 | return 0; |
1da177e4 | 1701 | } |
5e5f3f0f | 1702 | EXPORT_SYMBOL(ipv6_dev_get_saddr); |
1da177e4 | 1703 | |
8965779d | 1704 | int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr, |
479840ff | 1705 | u32 banned_flags) |
b7b1bfce HFS |
1706 | { |
1707 | struct inet6_ifaddr *ifp; | |
1708 | int err = -EADDRNOTAVAIL; | |
1709 | ||
602582ca HFS |
1710 | list_for_each_entry_reverse(ifp, &idev->addr_list, if_list) { |
1711 | if (ifp->scope > IFA_LINK) | |
1712 | break; | |
b7b1bfce HFS |
1713 | if (ifp->scope == IFA_LINK && |
1714 | !(ifp->flags & banned_flags)) { | |
1715 | *addr = ifp->addr; | |
1716 | err = 0; | |
1717 | break; | |
1718 | } | |
1719 | } | |
1720 | return err; | |
1721 | } | |
1722 | ||
95c385b4 | 1723 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, |
479840ff | 1724 | u32 banned_flags) |
1da177e4 LT |
1725 | { |
1726 | struct inet6_dev *idev; | |
1727 | int err = -EADDRNOTAVAIL; | |
1728 | ||
8814c4b5 | 1729 | rcu_read_lock(); |
e21e8467 SH |
1730 | idev = __in6_dev_get(dev); |
1731 | if (idev) { | |
1da177e4 | 1732 | read_lock_bh(&idev->lock); |
b7b1bfce | 1733 | err = __ipv6_get_lladdr(idev, addr, banned_flags); |
1da177e4 LT |
1734 | read_unlock_bh(&idev->lock); |
1735 | } | |
8814c4b5 | 1736 | rcu_read_unlock(); |
1da177e4 LT |
1737 | return err; |
1738 | } | |
1739 | ||
1740 | static int ipv6_count_addresses(struct inet6_dev *idev) | |
1741 | { | |
1742 | int cnt = 0; | |
1743 | struct inet6_ifaddr *ifp; | |
1744 | ||
1745 | read_lock_bh(&idev->lock); | |
502a2ffd | 1746 | list_for_each_entry(ifp, &idev->addr_list, if_list) |
1da177e4 LT |
1747 | cnt++; |
1748 | read_unlock_bh(&idev->lock); | |
1749 | return cnt; | |
1750 | } | |
1751 | ||
b71d1d42 | 1752 | int ipv6_chk_addr(struct net *net, const struct in6_addr *addr, |
2a7851bf | 1753 | const struct net_device *dev, int strict) |
c58da4c6 EK |
1754 | { |
1755 | return ipv6_chk_addr_and_flags(net, addr, dev, strict, IFA_F_TENTATIVE); | |
1756 | } | |
1757 | EXPORT_SYMBOL(ipv6_chk_addr); | |
1758 | ||
1759 | int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr, | |
1760 | const struct net_device *dev, int strict, | |
1761 | u32 banned_flags) | |
1da177e4 | 1762 | { |
eedf042a | 1763 | struct inet6_ifaddr *ifp; |
ddbe5032 | 1764 | unsigned int hash = inet6_addr_hash(addr); |
c58da4c6 | 1765 | u32 ifp_flags; |
1da177e4 | 1766 | |
5c578aed | 1767 | rcu_read_lock_bh(); |
b67bfe0d | 1768 | hlist_for_each_entry_rcu(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1769 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
bfeade08 | 1770 | continue; |
c58da4c6 EK |
1771 | /* Decouple optimistic from tentative for evaluation here. |
1772 | * Ban optimistic addresses explicitly, when required. | |
1773 | */ | |
1774 | ifp_flags = (ifp->flags&IFA_F_OPTIMISTIC) | |
1775 | ? (ifp->flags&~IFA_F_TENTATIVE) | |
1776 | : ifp->flags; | |
1da177e4 | 1777 | if (ipv6_addr_equal(&ifp->addr, addr) && |
c58da4c6 | 1778 | !(ifp_flags&banned_flags) && |
63159f29 | 1779 | (!dev || ifp->idev->dev == dev || |
eedf042a SH |
1780 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))) { |
1781 | rcu_read_unlock_bh(); | |
1782 | return 1; | |
1da177e4 LT |
1783 | } |
1784 | } | |
5c578aed | 1785 | |
eedf042a SH |
1786 | rcu_read_unlock_bh(); |
1787 | return 0; | |
1da177e4 | 1788 | } |
c58da4c6 | 1789 | EXPORT_SYMBOL(ipv6_chk_addr_and_flags); |
7159039a | 1790 | |
3e81c6da DM |
1791 | static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
1792 | struct net_device *dev) | |
1da177e4 | 1793 | { |
ddbe5032 | 1794 | unsigned int hash = inet6_addr_hash(addr); |
c2e21293 | 1795 | struct inet6_ifaddr *ifp; |
1da177e4 | 1796 | |
b67bfe0d | 1797 | hlist_for_each_entry(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1798 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
06bfe655 | 1799 | continue; |
1da177e4 | 1800 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
63159f29 | 1801 | if (!dev || ifp->idev->dev == dev) |
3e81c6da | 1802 | return true; |
1da177e4 LT |
1803 | } |
1804 | } | |
3e81c6da | 1805 | return false; |
1da177e4 LT |
1806 | } |
1807 | ||
7df37ff3 CB |
1808 | /* Compares an address/prefix_len with addresses on device @dev. |
1809 | * If one is found it returns true. | |
1810 | */ | |
1811 | bool ipv6_chk_custom_prefix(const struct in6_addr *addr, | |
1812 | const unsigned int prefix_len, struct net_device *dev) | |
1813 | { | |
1814 | struct inet6_dev *idev; | |
1815 | struct inet6_ifaddr *ifa; | |
1816 | bool ret = false; | |
1817 | ||
1818 | rcu_read_lock(); | |
1819 | idev = __in6_dev_get(dev); | |
1820 | if (idev) { | |
1821 | read_lock_bh(&idev->lock); | |
1822 | list_for_each_entry(ifa, &idev->addr_list, if_list) { | |
1823 | ret = ipv6_prefix_equal(addr, &ifa->addr, prefix_len); | |
1824 | if (ret) | |
1825 | break; | |
1826 | } | |
1827 | read_unlock_bh(&idev->lock); | |
1828 | } | |
1829 | rcu_read_unlock(); | |
1830 | ||
1831 | return ret; | |
1832 | } | |
1833 | EXPORT_SYMBOL(ipv6_chk_custom_prefix); | |
1834 | ||
b71d1d42 | 1835 | int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev) |
52eeeb84 YH |
1836 | { |
1837 | struct inet6_dev *idev; | |
1838 | struct inet6_ifaddr *ifa; | |
1839 | int onlink; | |
1840 | ||
1841 | onlink = 0; | |
1842 | rcu_read_lock(); | |
1843 | idev = __in6_dev_get(dev); | |
1844 | if (idev) { | |
1845 | read_lock_bh(&idev->lock); | |
502a2ffd | 1846 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
52eeeb84 YH |
1847 | onlink = ipv6_prefix_equal(addr, &ifa->addr, |
1848 | ifa->prefix_len); | |
1849 | if (onlink) | |
1850 | break; | |
1851 | } | |
1852 | read_unlock_bh(&idev->lock); | |
1853 | } | |
1854 | rcu_read_unlock(); | |
1855 | return onlink; | |
1856 | } | |
52eeeb84 YH |
1857 | EXPORT_SYMBOL(ipv6_chk_prefix); |
1858 | ||
9acd9f3a | 1859 | struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr, |
1cab3da6 | 1860 | struct net_device *dev, int strict) |
1da177e4 | 1861 | { |
b79d1d54 | 1862 | struct inet6_ifaddr *ifp, *result = NULL; |
ddbe5032 | 1863 | unsigned int hash = inet6_addr_hash(addr); |
1da177e4 | 1864 | |
5c578aed | 1865 | rcu_read_lock_bh(); |
b67bfe0d | 1866 | hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 1867 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
1cab3da6 | 1868 | continue; |
1da177e4 | 1869 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
63159f29 | 1870 | if (!dev || ifp->idev->dev == dev || |
1da177e4 | 1871 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { |
b79d1d54 | 1872 | result = ifp; |
1da177e4 LT |
1873 | in6_ifa_hold(ifp); |
1874 | break; | |
1875 | } | |
1876 | } | |
1877 | } | |
5c578aed | 1878 | rcu_read_unlock_bh(); |
1da177e4 | 1879 | |
b79d1d54 | 1880 | return result; |
1da177e4 LT |
1881 | } |
1882 | ||
1da177e4 LT |
1883 | /* Gets referenced address, destroys ifaddr */ |
1884 | ||
cc411d0b | 1885 | static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed) |
1da177e4 | 1886 | { |
3d171f39 LR |
1887 | if (dad_failed) |
1888 | ifp->flags |= IFA_F_DADFAILED; | |
1889 | ||
1da177e4 LT |
1890 | if (ifp->flags&IFA_F_PERMANENT) { |
1891 | spin_lock_bh(&ifp->lock); | |
c15b1cca | 1892 | addrconf_del_dad_work(ifp); |
1da177e4 LT |
1893 | ifp->flags |= IFA_F_TENTATIVE; |
1894 | spin_unlock_bh(&ifp->lock); | |
e2577a06 HX |
1895 | if (dad_failed) |
1896 | ipv6_ifa_notify(0, ifp); | |
1da177e4 | 1897 | in6_ifa_put(ifp); |
1da177e4 LT |
1898 | } else if (ifp->flags&IFA_F_TEMPORARY) { |
1899 | struct inet6_ifaddr *ifpub; | |
1900 | spin_lock_bh(&ifp->lock); | |
1901 | ifpub = ifp->ifpub; | |
1902 | if (ifpub) { | |
1903 | in6_ifa_hold(ifpub); | |
1904 | spin_unlock_bh(&ifp->lock); | |
1905 | ipv6_create_tempaddr(ifpub, ifp); | |
1906 | in6_ifa_put(ifpub); | |
1907 | } else { | |
1908 | spin_unlock_bh(&ifp->lock); | |
1909 | } | |
1910 | ipv6_del_addr(ifp); | |
c15b1cca | 1911 | } else { |
1da177e4 | 1912 | ipv6_del_addr(ifp); |
c15b1cca | 1913 | } |
1da177e4 LT |
1914 | } |
1915 | ||
f2344a13 HX |
1916 | static int addrconf_dad_end(struct inet6_ifaddr *ifp) |
1917 | { | |
1918 | int err = -ENOENT; | |
1919 | ||
8e8e676d | 1920 | spin_lock_bh(&ifp->lock); |
f2344a13 HX |
1921 | if (ifp->state == INET6_IFADDR_STATE_DAD) { |
1922 | ifp->state = INET6_IFADDR_STATE_POSTDAD; | |
1923 | err = 0; | |
1924 | } | |
8e8e676d | 1925 | spin_unlock_bh(&ifp->lock); |
f2344a13 HX |
1926 | |
1927 | return err; | |
1928 | } | |
1929 | ||
3c21edbd YH |
1930 | void addrconf_dad_failure(struct inet6_ifaddr *ifp) |
1931 | { | |
1b34be74 | 1932 | struct inet6_dev *idev = ifp->idev; |
1855b7c3 | 1933 | struct net *net = dev_net(ifp->idev->dev); |
9bdd8d40 | 1934 | |
853dc2e0 UB |
1935 | if (addrconf_dad_end(ifp)) { |
1936 | in6_ifa_put(ifp); | |
f2344a13 | 1937 | return; |
853dc2e0 | 1938 | } |
f2344a13 | 1939 | |
e87cc472 JP |
1940 | net_info_ratelimited("%s: IPv6 duplicate address %pI6c detected!\n", |
1941 | ifp->idev->dev->name, &ifp->addr); | |
9bdd8d40 | 1942 | |
5f40ef77 HFS |
1943 | spin_lock_bh(&ifp->lock); |
1944 | ||
1945 | if (ifp->flags & IFA_F_STABLE_PRIVACY) { | |
1946 | int scope = ifp->scope; | |
1947 | u32 flags = ifp->flags; | |
1948 | struct in6_addr new_addr; | |
1949 | struct inet6_ifaddr *ifp2; | |
1950 | u32 valid_lft, preferred_lft; | |
1951 | int pfxlen = ifp->prefix_len; | |
5f40ef77 HFS |
1952 | int retries = ifp->stable_privacy_retry + 1; |
1953 | ||
1855b7c3 | 1954 | if (retries > net->ipv6.sysctl.idgen_retries) { |
5f40ef77 HFS |
1955 | net_info_ratelimited("%s: privacy stable address generation failed because of DAD conflicts!\n", |
1956 | ifp->idev->dev->name); | |
1957 | goto errdad; | |
1958 | } | |
1959 | ||
1960 | new_addr = ifp->addr; | |
1961 | if (ipv6_generate_stable_address(&new_addr, retries, | |
1962 | idev)) | |
1963 | goto errdad; | |
1964 | ||
1965 | valid_lft = ifp->valid_lft; | |
1966 | preferred_lft = ifp->prefered_lft; | |
1967 | ||
1968 | spin_unlock_bh(&ifp->lock); | |
1b34be74 | 1969 | |
5f40ef77 HFS |
1970 | if (idev->cnf.max_addresses && |
1971 | ipv6_count_addresses(idev) >= | |
1972 | idev->cnf.max_addresses) | |
1973 | goto lock_errdad; | |
1974 | ||
1975 | net_info_ratelimited("%s: generating new stable privacy address because of DAD conflict\n", | |
1976 | ifp->idev->dev->name); | |
1977 | ||
1978 | ifp2 = ipv6_add_addr(idev, &new_addr, NULL, pfxlen, | |
1979 | scope, flags, valid_lft, | |
1980 | preferred_lft); | |
1981 | if (IS_ERR(ifp2)) | |
1982 | goto lock_errdad; | |
1983 | ||
1984 | spin_lock_bh(&ifp2->lock); | |
1985 | ifp2->stable_privacy_retry = retries; | |
1986 | ifp2->state = INET6_IFADDR_STATE_PREDAD; | |
1987 | spin_unlock_bh(&ifp2->lock); | |
1988 | ||
1855b7c3 | 1989 | addrconf_mod_dad_work(ifp2, net->ipv6.sysctl.idgen_delay); |
5f40ef77 HFS |
1990 | in6_ifa_put(ifp2); |
1991 | lock_errdad: | |
1992 | spin_lock_bh(&ifp->lock); | |
1b34be74 YH |
1993 | } |
1994 | ||
5f40ef77 | 1995 | errdad: |
c15b1cca HFS |
1996 | /* transition from _POSTDAD to _ERRDAD */ |
1997 | ifp->state = INET6_IFADDR_STATE_ERRDAD; | |
8e8e676d | 1998 | spin_unlock_bh(&ifp->lock); |
c15b1cca HFS |
1999 | |
2000 | addrconf_mod_dad_work(ifp, 0); | |
751eb6b6 | 2001 | in6_ifa_put(ifp); |
3c21edbd | 2002 | } |
1da177e4 | 2003 | |
a9ed4a29 SD |
2004 | /* Join to solicited addr multicast group. |
2005 | * caller must hold RTNL */ | |
b71d1d42 | 2006 | void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr) |
1da177e4 LT |
2007 | { |
2008 | struct in6_addr maddr; | |
2009 | ||
2010 | if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
2011 | return; | |
2012 | ||
2013 | addrconf_addr_solict_mult(addr, &maddr); | |
2014 | ipv6_dev_mc_inc(dev, &maddr); | |
2015 | } | |
2016 | ||
a9ed4a29 | 2017 | /* caller must hold RTNL */ |
b71d1d42 | 2018 | void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr) |
1da177e4 LT |
2019 | { |
2020 | struct in6_addr maddr; | |
2021 | ||
2022 | if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
2023 | return; | |
2024 | ||
2025 | addrconf_addr_solict_mult(addr, &maddr); | |
2026 | __ipv6_dev_mc_dec(idev, &maddr); | |
2027 | } | |
2028 | ||
a9ed4a29 | 2029 | /* caller must hold RTNL */ |
20380731 | 2030 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
2031 | { |
2032 | struct in6_addr addr; | |
c15b1cca | 2033 | |
88ad3149 | 2034 | if (ifp->prefix_len >= 127) /* RFC 6164 */ |
2bda8a0c | 2035 | return; |
1da177e4 LT |
2036 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
2037 | if (ipv6_addr_any(&addr)) | |
2038 | return; | |
013b4d90 | 2039 | __ipv6_dev_ac_inc(ifp->idev, &addr); |
1da177e4 LT |
2040 | } |
2041 | ||
a9ed4a29 | 2042 | /* caller must hold RTNL */ |
20380731 | 2043 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
2044 | { |
2045 | struct in6_addr addr; | |
c15b1cca | 2046 | |
88ad3149 | 2047 | if (ifp->prefix_len >= 127) /* RFC 6164 */ |
32019e65 | 2048 | return; |
1da177e4 LT |
2049 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
2050 | if (ipv6_addr_any(&addr)) | |
2051 | return; | |
2052 | __ipv6_dev_ac_dec(ifp->idev, &addr); | |
2053 | } | |
2054 | ||
06a4c1c5 | 2055 | static int addrconf_ifid_eui64(u8 *eui, struct net_device *dev) |
2056 | { | |
5241c2d7 | 2057 | if (dev->addr_len != EUI64_ADDR_LEN) |
06a4c1c5 | 2058 | return -1; |
5241c2d7 | 2059 | memcpy(eui, dev->dev_addr, EUI64_ADDR_LEN); |
5e98a36e | 2060 | eui[0] ^= 2; |
06a4c1c5 | 2061 | return 0; |
2062 | } | |
2063 | ||
cb6bf355 YH |
2064 | static int addrconf_ifid_ieee1394(u8 *eui, struct net_device *dev) |
2065 | { | |
2066 | union fwnet_hwaddr *ha; | |
2067 | ||
2068 | if (dev->addr_len != FWNET_ALEN) | |
2069 | return -1; | |
2070 | ||
2071 | ha = (union fwnet_hwaddr *)dev->dev_addr; | |
2072 | ||
2073 | memcpy(eui, &ha->uc.uniq_id, sizeof(ha->uc.uniq_id)); | |
2074 | eui[0] ^= 2; | |
2075 | return 0; | |
2076 | } | |
2077 | ||
073a8e0e YH |
2078 | static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) |
2079 | { | |
2080 | /* XXX: inherit EUI-64 from other interface -- yoshfuji */ | |
2081 | if (dev->addr_len != ARCNET_ALEN) | |
2082 | return -1; | |
2083 | memset(eui, 0, 7); | |
8e5e8f30 | 2084 | eui[7] = *(u8 *)dev->dev_addr; |
073a8e0e YH |
2085 | return 0; |
2086 | } | |
2087 | ||
2088 | static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) | |
2089 | { | |
2090 | if (dev->addr_len != INFINIBAND_ALEN) | |
2091 | return -1; | |
2092 | memcpy(eui, dev->dev_addr + 12, 8); | |
2093 | eui[0] |= 2; | |
2094 | return 0; | |
2095 | } | |
2096 | ||
c61393ea | 2097 | static int __ipv6_isatap_ifid(u8 *eui, __be32 addr) |
dfd982ba | 2098 | { |
9af28511 SH |
2099 | if (addr == 0) |
2100 | return -1; | |
dfd982ba YH |
2101 | eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) || |
2102 | ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) || | |
2103 | ipv4_is_private_172(addr) || ipv4_is_test_192(addr) || | |
2104 | ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) || | |
2105 | ipv4_is_test_198(addr) || ipv4_is_multicast(addr) || | |
2106 | ipv4_is_lbcast(addr)) ? 0x00 : 0x02; | |
2107 | eui[1] = 0; | |
2108 | eui[2] = 0x5E; | |
2109 | eui[3] = 0xFE; | |
2110 | memcpy(eui + 4, &addr, 4); | |
2111 | return 0; | |
2112 | } | |
dfd982ba YH |
2113 | |
2114 | static int addrconf_ifid_sit(u8 *eui, struct net_device *dev) | |
2115 | { | |
2116 | if (dev->priv_flags & IFF_ISATAP) | |
2117 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); | |
2118 | return -1; | |
2119 | } | |
2120 | ||
aee80b54 | 2121 | static int addrconf_ifid_gre(u8 *eui, struct net_device *dev) |
2122 | { | |
2123 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); | |
2124 | } | |
2125 | ||
e837735e ND |
2126 | static int addrconf_ifid_ip6tnl(u8 *eui, struct net_device *dev) |
2127 | { | |
2128 | memcpy(eui, dev->perm_addr, 3); | |
2129 | memcpy(eui + 5, dev->perm_addr + 3, 3); | |
2130 | eui[3] = 0xFF; | |
2131 | eui[4] = 0xFE; | |
2132 | eui[0] ^= 2; | |
2133 | return 0; | |
2134 | } | |
2135 | ||
1da177e4 LT |
2136 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) |
2137 | { | |
2138 | switch (dev->type) { | |
2139 | case ARPHRD_ETHER: | |
2140 | case ARPHRD_FDDI: | |
073a8e0e | 2141 | return addrconf_ifid_eui48(eui, dev); |
1da177e4 | 2142 | case ARPHRD_ARCNET: |
073a8e0e | 2143 | return addrconf_ifid_arcnet(eui, dev); |
1da177e4 | 2144 | case ARPHRD_INFINIBAND: |
073a8e0e | 2145 | return addrconf_ifid_infiniband(eui, dev); |
c7dc89c0 | 2146 | case ARPHRD_SIT: |
dfd982ba | 2147 | return addrconf_ifid_sit(eui, dev); |
aee80b54 | 2148 | case ARPHRD_IPGRE: |
45ce0fd1 | 2149 | case ARPHRD_TUNNEL: |
aee80b54 | 2150 | return addrconf_ifid_gre(eui, dev); |
e74bccb8 | 2151 | case ARPHRD_6LOWPAN: |
06a4c1c5 | 2152 | return addrconf_ifid_eui64(eui, dev); |
cb6bf355 YH |
2153 | case ARPHRD_IEEE1394: |
2154 | return addrconf_ifid_ieee1394(eui, dev); | |
e837735e | 2155 | case ARPHRD_TUNNEL6: |
45ce0fd1 | 2156 | case ARPHRD_IP6GRE: |
e837735e | 2157 | return addrconf_ifid_ip6tnl(eui, dev); |
1da177e4 LT |
2158 | } |
2159 | return -1; | |
2160 | } | |
2161 | ||
2162 | static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) | |
2163 | { | |
2164 | int err = -1; | |
2165 | struct inet6_ifaddr *ifp; | |
2166 | ||
2167 | read_lock_bh(&idev->lock); | |
602582ca HFS |
2168 | list_for_each_entry_reverse(ifp, &idev->addr_list, if_list) { |
2169 | if (ifp->scope > IFA_LINK) | |
2170 | break; | |
1da177e4 LT |
2171 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { |
2172 | memcpy(eui, ifp->addr.s6_addr+8, 8); | |
2173 | err = 0; | |
2174 | break; | |
2175 | } | |
2176 | } | |
2177 | read_unlock_bh(&idev->lock); | |
2178 | return err; | |
2179 | } | |
2180 | ||
1da177e4 | 2181 | /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ |
9d6280da | 2182 | static void ipv6_regen_rndid(struct inet6_dev *idev) |
1da177e4 | 2183 | { |
1da177e4 | 2184 | regen: |
955189ef | 2185 | get_random_bytes(idev->rndid, sizeof(idev->rndid)); |
1da177e4 | 2186 | idev->rndid[0] &= ~0x02; |
1da177e4 LT |
2187 | |
2188 | /* | |
2189 | * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: | |
2190 | * check if generated address is not inappropriate | |
2191 | * | |
2192 | * - Reserved subnet anycast (RFC 2526) | |
2193 | * 11111101 11....11 1xxxxxxx | |
c7dc89c0 | 2194 | * - ISATAP (RFC4214) 6.1 |
1da177e4 LT |
2195 | * 00-00-5E-FE-xx-xx-xx-xx |
2196 | * - value 0 | |
2197 | * - XXX: already assigned to an address on the device | |
2198 | */ | |
1ab1457c | 2199 | if (idev->rndid[0] == 0xfd && |
1da177e4 LT |
2200 | (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff && |
2201 | (idev->rndid[7]&0x80)) | |
2202 | goto regen; | |
2203 | if ((idev->rndid[0]|idev->rndid[1]) == 0) { | |
2204 | if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe) | |
2205 | goto regen; | |
2206 | if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00) | |
2207 | goto regen; | |
2208 | } | |
1da177e4 LT |
2209 | } |
2210 | ||
9d6280da | 2211 | static void ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) |
8e5e8f30 | 2212 | { |
1da177e4 | 2213 | if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0) |
9d6280da | 2214 | ipv6_regen_rndid(idev); |
1da177e4 | 2215 | } |
1da177e4 LT |
2216 | |
2217 | /* | |
2218 | * Add prefix route. | |
2219 | */ | |
2220 | ||
2221 | static void | |
2222 | addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev, | |
e431b8c0 | 2223 | unsigned long expires, u32 flags) |
1da177e4 | 2224 | { |
86872cb5 | 2225 | struct fib6_config cfg = { |
ca254490 | 2226 | .fc_table = l3mdev_fib_table(dev) ? : RT6_TABLE_PREFIX, |
86872cb5 TG |
2227 | .fc_metric = IP6_RT_PRIO_ADDRCONF, |
2228 | .fc_ifindex = dev->ifindex, | |
2229 | .fc_expires = expires, | |
2230 | .fc_dst_len = plen, | |
2231 | .fc_flags = RTF_UP | flags, | |
c346dca1 | 2232 | .fc_nlinfo.nl_net = dev_net(dev), |
f410a1fb | 2233 | .fc_protocol = RTPROT_KERNEL, |
86872cb5 | 2234 | }; |
1da177e4 | 2235 | |
4e3fd7a0 | 2236 | cfg.fc_dst = *pfx; |
1da177e4 LT |
2237 | |
2238 | /* Prevent useless cloning on PtP SIT. | |
2239 | This thing is done here expecting that the whole | |
2240 | class of non-broadcast devices need not cloning. | |
2241 | */ | |
07a93626 | 2242 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
86872cb5 TG |
2243 | if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT)) |
2244 | cfg.fc_flags |= RTF_NONEXTHOP; | |
0be669bb | 2245 | #endif |
1da177e4 | 2246 | |
86872cb5 | 2247 | ip6_route_add(&cfg); |
1da177e4 LT |
2248 | } |
2249 | ||
14ef37b6 AH |
2250 | |
2251 | static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx, | |
2252 | int plen, | |
2253 | const struct net_device *dev, | |
2254 | u32 flags, u32 noflags) | |
2255 | { | |
2256 | struct fib6_node *fn; | |
2257 | struct rt6_info *rt = NULL; | |
2258 | struct fib6_table *table; | |
ca254490 | 2259 | u32 tb_id = l3mdev_fib_table(dev) ? : RT6_TABLE_PREFIX; |
14ef37b6 | 2260 | |
ca254490 | 2261 | table = fib6_get_table(dev_net(dev), tb_id); |
63159f29 | 2262 | if (!table) |
14ef37b6 AH |
2263 | return NULL; |
2264 | ||
5744dd9b | 2265 | read_lock_bh(&table->tb6_lock); |
14ef37b6 AH |
2266 | fn = fib6_locate(&table->tb6_root, pfx, plen, NULL, 0); |
2267 | if (!fn) | |
2268 | goto out; | |
1f56a01f MKL |
2269 | |
2270 | noflags |= RTF_CACHE; | |
14ef37b6 | 2271 | for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) { |
d1918542 | 2272 | if (rt->dst.dev->ifindex != dev->ifindex) |
14ef37b6 AH |
2273 | continue; |
2274 | if ((rt->rt6i_flags & flags) != flags) | |
2275 | continue; | |
85da53bf | 2276 | if ((rt->rt6i_flags & noflags) != 0) |
14ef37b6 AH |
2277 | continue; |
2278 | dst_hold(&rt->dst); | |
2279 | break; | |
2280 | } | |
2281 | out: | |
5744dd9b | 2282 | read_unlock_bh(&table->tb6_lock); |
14ef37b6 AH |
2283 | return rt; |
2284 | } | |
2285 | ||
2286 | ||
1da177e4 LT |
2287 | /* Create "default" multicast route to the interface */ |
2288 | ||
2289 | static void addrconf_add_mroute(struct net_device *dev) | |
2290 | { | |
86872cb5 | 2291 | struct fib6_config cfg = { |
ca254490 | 2292 | .fc_table = l3mdev_fib_table(dev) ? : RT6_TABLE_LOCAL, |
86872cb5 TG |
2293 | .fc_metric = IP6_RT_PRIO_ADDRCONF, |
2294 | .fc_ifindex = dev->ifindex, | |
2295 | .fc_dst_len = 8, | |
2296 | .fc_flags = RTF_UP, | |
c346dca1 | 2297 | .fc_nlinfo.nl_net = dev_net(dev), |
86872cb5 TG |
2298 | }; |
2299 | ||
2300 | ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); | |
2301 | ||
2302 | ip6_route_add(&cfg); | |
1da177e4 LT |
2303 | } |
2304 | ||
1da177e4 LT |
2305 | static struct inet6_dev *addrconf_add_dev(struct net_device *dev) |
2306 | { | |
2307 | struct inet6_dev *idev; | |
2308 | ||
2309 | ASSERT_RTNL(); | |
2310 | ||
e21e8467 SH |
2311 | idev = ipv6_find_idev(dev); |
2312 | if (!idev) | |
64e724f6 BH |
2313 | return ERR_PTR(-ENOBUFS); |
2314 | ||
2315 | if (idev->cnf.disable_ipv6) | |
2316 | return ERR_PTR(-EACCES); | |
1da177e4 LT |
2317 | |
2318 | /* Add default multicast route */ | |
ba46ee4c | 2319 | if (!(dev->flags & IFF_LOOPBACK) && !netif_is_l3_master(dev)) |
4af04aba | 2320 | addrconf_add_mroute(dev); |
1da177e4 | 2321 | |
1da177e4 LT |
2322 | return idev; |
2323 | } | |
2324 | ||
53bd6749 JP |
2325 | static void manage_tempaddrs(struct inet6_dev *idev, |
2326 | struct inet6_ifaddr *ifp, | |
2327 | __u32 valid_lft, __u32 prefered_lft, | |
2328 | bool create, unsigned long now) | |
2329 | { | |
2330 | u32 flags; | |
2331 | struct inet6_ifaddr *ift; | |
2332 | ||
2333 | read_lock_bh(&idev->lock); | |
2334 | /* update all temporary addresses in the list */ | |
2335 | list_for_each_entry(ift, &idev->tempaddr_list, tmp_list) { | |
2336 | int age, max_valid, max_prefered; | |
2337 | ||
2338 | if (ifp != ift->ifpub) | |
2339 | continue; | |
2340 | ||
2341 | /* RFC 4941 section 3.3: | |
2342 | * If a received option will extend the lifetime of a public | |
2343 | * address, the lifetimes of temporary addresses should | |
2344 | * be extended, subject to the overall constraint that no | |
2345 | * temporary addresses should ever remain "valid" or "preferred" | |
2346 | * for a time longer than (TEMP_VALID_LIFETIME) or | |
2347 | * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR), respectively. | |
2348 | */ | |
2349 | age = (now - ift->cstamp) / HZ; | |
2350 | max_valid = idev->cnf.temp_valid_lft - age; | |
2351 | if (max_valid < 0) | |
2352 | max_valid = 0; | |
2353 | ||
2354 | max_prefered = idev->cnf.temp_prefered_lft - | |
76506a98 | 2355 | idev->desync_factor - age; |
53bd6749 JP |
2356 | if (max_prefered < 0) |
2357 | max_prefered = 0; | |
2358 | ||
2359 | if (valid_lft > max_valid) | |
2360 | valid_lft = max_valid; | |
2361 | ||
2362 | if (prefered_lft > max_prefered) | |
2363 | prefered_lft = max_prefered; | |
2364 | ||
2365 | spin_lock(&ift->lock); | |
2366 | flags = ift->flags; | |
2367 | ift->valid_lft = valid_lft; | |
2368 | ift->prefered_lft = prefered_lft; | |
2369 | ift->tstamp = now; | |
2370 | if (prefered_lft > 0) | |
2371 | ift->flags &= ~IFA_F_DEPRECATED; | |
2372 | ||
2373 | spin_unlock(&ift->lock); | |
2374 | if (!(flags&IFA_F_TENTATIVE)) | |
2375 | ipv6_ifa_notify(0, ift); | |
2376 | } | |
2377 | ||
2378 | if ((create || list_empty(&idev->tempaddr_list)) && | |
2379 | idev->cnf.use_tempaddr > 0) { | |
2380 | /* When a new public address is created as described | |
2381 | * in [ADDRCONF], also create a new temporary address. | |
2382 | * Also create a temporary address if it's enabled but | |
2383 | * no temporary address currently exists. | |
2384 | */ | |
2385 | read_unlock_bh(&idev->lock); | |
2386 | ipv6_create_tempaddr(ifp, NULL); | |
2387 | } else { | |
2388 | read_unlock_bh(&idev->lock); | |
2389 | } | |
2390 | } | |
2391 | ||
cc9da6cc BM |
2392 | static bool is_addr_mode_generate_stable(struct inet6_dev *idev) |
2393 | { | |
d35a00b8 FJ |
2394 | return idev->cnf.addr_gen_mode == IN6_ADDR_GEN_MODE_STABLE_PRIVACY || |
2395 | idev->cnf.addr_gen_mode == IN6_ADDR_GEN_MODE_RANDOM; | |
cc9da6cc BM |
2396 | } |
2397 | ||
cc84b3c6 AA |
2398 | int addrconf_prefix_rcv_add_addr(struct net *net, struct net_device *dev, |
2399 | const struct prefix_info *pinfo, | |
2400 | struct inet6_dev *in6_dev, | |
2401 | const struct in6_addr *addr, int addr_type, | |
2402 | u32 addr_flags, bool sllao, bool tokenized, | |
2403 | __u32 valid_lft, u32 prefered_lft) | |
4f672235 AA |
2404 | { |
2405 | struct inet6_ifaddr *ifp = ipv6_get_ifaddr(net, addr, dev, 1); | |
2406 | int create = 0, update_lft = 0; | |
2407 | ||
2408 | if (!ifp && valid_lft) { | |
2409 | int max_addresses = in6_dev->cnf.max_addresses; | |
2410 | ||
2411 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
2412 | if (in6_dev->cnf.optimistic_dad && | |
2413 | !net->ipv6.devconf_all->forwarding && sllao) | |
2414 | addr_flags |= IFA_F_OPTIMISTIC; | |
2415 | #endif | |
2416 | ||
2417 | /* Do not allow to create too much of autoconfigured | |
2418 | * addresses; this would be too easy way to crash kernel. | |
2419 | */ | |
2420 | if (!max_addresses || | |
2421 | ipv6_count_addresses(in6_dev) < max_addresses) | |
2422 | ifp = ipv6_add_addr(in6_dev, addr, NULL, | |
2423 | pinfo->prefix_len, | |
2424 | addr_type&IPV6_ADDR_SCOPE_MASK, | |
2425 | addr_flags, valid_lft, | |
2426 | prefered_lft); | |
2427 | ||
2428 | if (IS_ERR_OR_NULL(ifp)) | |
2429 | return -1; | |
2430 | ||
2431 | update_lft = 0; | |
2432 | create = 1; | |
2433 | spin_lock_bh(&ifp->lock); | |
2434 | ifp->flags |= IFA_F_MANAGETEMPADDR; | |
2435 | ifp->cstamp = jiffies; | |
2436 | ifp->tokenized = tokenized; | |
2437 | spin_unlock_bh(&ifp->lock); | |
2438 | addrconf_dad_start(ifp); | |
2439 | } | |
2440 | ||
2441 | if (ifp) { | |
2442 | u32 flags; | |
2443 | unsigned long now; | |
2444 | u32 stored_lft; | |
2445 | ||
2446 | /* update lifetime (RFC2462 5.5.3 e) */ | |
2447 | spin_lock_bh(&ifp->lock); | |
2448 | now = jiffies; | |
2449 | if (ifp->valid_lft > (now - ifp->tstamp) / HZ) | |
2450 | stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; | |
2451 | else | |
2452 | stored_lft = 0; | |
2453 | if (!update_lft && !create && stored_lft) { | |
2454 | const u32 minimum_lft = min_t(u32, | |
2455 | stored_lft, MIN_VALID_LIFETIME); | |
2456 | valid_lft = max(valid_lft, minimum_lft); | |
2457 | ||
2458 | /* RFC4862 Section 5.5.3e: | |
2459 | * "Note that the preferred lifetime of the | |
2460 | * corresponding address is always reset to | |
2461 | * the Preferred Lifetime in the received | |
2462 | * Prefix Information option, regardless of | |
2463 | * whether the valid lifetime is also reset or | |
2464 | * ignored." | |
2465 | * | |
2466 | * So we should always update prefered_lft here. | |
2467 | */ | |
2468 | update_lft = 1; | |
2469 | } | |
2470 | ||
2471 | if (update_lft) { | |
2472 | ifp->valid_lft = valid_lft; | |
2473 | ifp->prefered_lft = prefered_lft; | |
2474 | ifp->tstamp = now; | |
2475 | flags = ifp->flags; | |
2476 | ifp->flags &= ~IFA_F_DEPRECATED; | |
2477 | spin_unlock_bh(&ifp->lock); | |
2478 | ||
2479 | if (!(flags&IFA_F_TENTATIVE)) | |
2480 | ipv6_ifa_notify(0, ifp); | |
2481 | } else | |
2482 | spin_unlock_bh(&ifp->lock); | |
2483 | ||
2484 | manage_tempaddrs(in6_dev, ifp, valid_lft, prefered_lft, | |
2485 | create, now); | |
2486 | ||
2487 | in6_ifa_put(ifp); | |
2488 | addrconf_verify(); | |
2489 | } | |
2490 | ||
2491 | return 0; | |
2492 | } | |
cc84b3c6 | 2493 | EXPORT_SYMBOL_GPL(addrconf_prefix_rcv_add_addr); |
4f672235 | 2494 | |
e6bff995 | 2495 | void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao) |
1da177e4 LT |
2496 | { |
2497 | struct prefix_info *pinfo; | |
2498 | __u32 valid_lft; | |
2499 | __u32 prefered_lft; | |
4f672235 | 2500 | int addr_type, err; |
64236f3f | 2501 | u32 addr_flags = 0; |
1da177e4 | 2502 | struct inet6_dev *in6_dev; |
56d417b1 | 2503 | struct net *net = dev_net(dev); |
1da177e4 LT |
2504 | |
2505 | pinfo = (struct prefix_info *) opt; | |
1ab1457c | 2506 | |
1da177e4 | 2507 | if (len < sizeof(struct prefix_info)) { |
ba3542e1 | 2508 | ADBG("addrconf: prefix option too short\n"); |
1da177e4 LT |
2509 | return; |
2510 | } | |
1ab1457c | 2511 | |
1da177e4 LT |
2512 | /* |
2513 | * Validation checks ([ADDRCONF], page 19) | |
2514 | */ | |
2515 | ||
2516 | addr_type = ipv6_addr_type(&pinfo->prefix); | |
2517 | ||
2518 | if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) | |
2519 | return; | |
2520 | ||
2521 | valid_lft = ntohl(pinfo->valid); | |
2522 | prefered_lft = ntohl(pinfo->prefered); | |
2523 | ||
2524 | if (prefered_lft > valid_lft) { | |
e87cc472 | 2525 | net_warn_ratelimited("addrconf: prefix option has invalid lifetime\n"); |
1da177e4 LT |
2526 | return; |
2527 | } | |
2528 | ||
2529 | in6_dev = in6_dev_get(dev); | |
2530 | ||
63159f29 | 2531 | if (!in6_dev) { |
e87cc472 JP |
2532 | net_dbg_ratelimited("addrconf: device %s not configured\n", |
2533 | dev->name); | |
1da177e4 LT |
2534 | return; |
2535 | } | |
2536 | ||
2537 | /* | |
2538 | * Two things going on here: | |
2539 | * 1) Add routes for on-link prefixes | |
2540 | * 2) Configure prefixes with the auto flag set | |
2541 | */ | |
2542 | ||
4bed72e4 YH |
2543 | if (pinfo->onlink) { |
2544 | struct rt6_info *rt; | |
2545 | unsigned long rt_expires; | |
2546 | ||
6f704992 YH |
2547 | /* Avoid arithmetic overflow. Really, we could |
2548 | * save rt_expires in seconds, likely valid_lft, | |
2549 | * but it would require division in fib gc, that it | |
2550 | * not good. | |
2551 | */ | |
4bed72e4 YH |
2552 | if (HZ > USER_HZ) |
2553 | rt_expires = addrconf_timeout_fixup(valid_lft, HZ); | |
2554 | else | |
2555 | rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ); | |
3dd4bc68 | 2556 | |
4bed72e4 YH |
2557 | if (addrconf_finite_timeout(rt_expires)) |
2558 | rt_expires *= HZ; | |
1da177e4 | 2559 | |
14ef37b6 AH |
2560 | rt = addrconf_get_prefix_route(&pinfo->prefix, |
2561 | pinfo->prefix_len, | |
2562 | dev, | |
2563 | RTF_ADDRCONF | RTF_PREFIX_RT, | |
2564 | RTF_GATEWAY | RTF_DEFAULT); | |
1da177e4 | 2565 | |
14ef37b6 | 2566 | if (rt) { |
6f704992 YH |
2567 | /* Autoconf prefix route */ |
2568 | if (valid_lft == 0) { | |
2569 | ip6_del_rt(rt); | |
2570 | rt = NULL; | |
4bed72e4 | 2571 | } else if (addrconf_finite_timeout(rt_expires)) { |
6f704992 | 2572 | /* not infinity */ |
1716a961 | 2573 | rt6_set_expires(rt, jiffies + rt_expires); |
6f704992 | 2574 | } else { |
1716a961 | 2575 | rt6_clean_expires(rt); |
1da177e4 LT |
2576 | } |
2577 | } else if (valid_lft) { | |
6f704992 | 2578 | clock_t expires = 0; |
4bed72e4 YH |
2579 | int flags = RTF_ADDRCONF | RTF_PREFIX_RT; |
2580 | if (addrconf_finite_timeout(rt_expires)) { | |
6f704992 YH |
2581 | /* not infinity */ |
2582 | flags |= RTF_EXPIRES; | |
2583 | expires = jiffies_to_clock_t(rt_expires); | |
2584 | } | |
1da177e4 | 2585 | addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, |
6f704992 | 2586 | dev, expires, flags); |
1da177e4 | 2587 | } |
94e187c0 | 2588 | ip6_rt_put(rt); |
1da177e4 LT |
2589 | } |
2590 | ||
2591 | /* Try to figure out our local address for this prefix */ | |
2592 | ||
2593 | if (pinfo->autoconf && in6_dev->cnf.autoconf) { | |
1da177e4 | 2594 | struct in6_addr addr; |
f997c55c | 2595 | bool tokenized = false, dev_addr_generated = false; |
1da177e4 LT |
2596 | |
2597 | if (pinfo->prefix_len == 64) { | |
2598 | memcpy(&addr, &pinfo->prefix, 8); | |
f53adae4 DB |
2599 | |
2600 | if (!ipv6_addr_any(&in6_dev->token)) { | |
2601 | read_lock_bh(&in6_dev->lock); | |
2602 | memcpy(addr.s6_addr + 8, | |
2603 | in6_dev->token.s6_addr + 8, 8); | |
2604 | read_unlock_bh(&in6_dev->lock); | |
617fe29d | 2605 | tokenized = true; |
cc9da6cc | 2606 | } else if (is_addr_mode_generate_stable(in6_dev) && |
622c81d5 HFS |
2607 | !ipv6_generate_stable_address(&addr, 0, |
2608 | in6_dev)) { | |
64236f3f | 2609 | addr_flags |= IFA_F_STABLE_PRIVACY; |
622c81d5 | 2610 | goto ok; |
f53adae4 DB |
2611 | } else if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && |
2612 | ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { | |
4f672235 | 2613 | goto put; |
f997c55c AA |
2614 | } else { |
2615 | dev_addr_generated = true; | |
1da177e4 LT |
2616 | } |
2617 | goto ok; | |
2618 | } | |
e87cc472 JP |
2619 | net_dbg_ratelimited("IPv6 addrconf: prefix with wrong length %d\n", |
2620 | pinfo->prefix_len); | |
4f672235 | 2621 | goto put; |
1da177e4 LT |
2622 | |
2623 | ok: | |
4f672235 AA |
2624 | err = addrconf_prefix_rcv_add_addr(net, dev, pinfo, in6_dev, |
2625 | &addr, addr_type, | |
2626 | addr_flags, sllao, | |
2627 | tokenized, valid_lft, | |
2628 | prefered_lft); | |
2629 | if (err) | |
2630 | goto put; | |
f997c55c AA |
2631 | |
2632 | /* Ignore error case here because previous prefix add addr was | |
2633 | * successful which will be notified. | |
2634 | */ | |
2635 | ndisc_ops_prefix_rcv_add_addr(net, dev, pinfo, in6_dev, &addr, | |
2636 | addr_type, addr_flags, sllao, | |
2637 | tokenized, valid_lft, | |
2638 | prefered_lft, | |
2639 | dev_addr_generated); | |
1da177e4 LT |
2640 | } |
2641 | inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); | |
4f672235 | 2642 | put: |
1da177e4 LT |
2643 | in6_dev_put(in6_dev); |
2644 | } | |
2645 | ||
2646 | /* | |
2647 | * Set destination address. | |
2648 | * Special case for SIT interfaces where we create a new "virtual" | |
2649 | * device. | |
2650 | */ | |
af284937 | 2651 | int addrconf_set_dstaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2652 | { |
2653 | struct in6_ifreq ireq; | |
2654 | struct net_device *dev; | |
2655 | int err = -EINVAL; | |
2656 | ||
2657 | rtnl_lock(); | |
2658 | ||
2659 | err = -EFAULT; | |
2660 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2661 | goto err_exit; | |
2662 | ||
af284937 | 2663 | dev = __dev_get_by_index(net, ireq.ifr6_ifindex); |
1da177e4 LT |
2664 | |
2665 | err = -ENODEV; | |
63159f29 | 2666 | if (!dev) |
1da177e4 LT |
2667 | goto err_exit; |
2668 | ||
07a93626 | 2669 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 | 2670 | if (dev->type == ARPHRD_SIT) { |
5bc3eb7e | 2671 | const struct net_device_ops *ops = dev->netdev_ops; |
1da177e4 | 2672 | struct ifreq ifr; |
1da177e4 LT |
2673 | struct ip_tunnel_parm p; |
2674 | ||
2675 | err = -EADDRNOTAVAIL; | |
2676 | if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4)) | |
2677 | goto err_exit; | |
2678 | ||
2679 | memset(&p, 0, sizeof(p)); | |
2680 | p.iph.daddr = ireq.ifr6_addr.s6_addr32[3]; | |
2681 | p.iph.saddr = 0; | |
2682 | p.iph.version = 4; | |
2683 | p.iph.ihl = 5; | |
2684 | p.iph.protocol = IPPROTO_IPV6; | |
2685 | p.iph.ttl = 64; | |
d20b3109 | 2686 | ifr.ifr_ifru.ifru_data = (__force void __user *)&p; |
1da177e4 | 2687 | |
5bc3eb7e SH |
2688 | if (ops->ndo_do_ioctl) { |
2689 | mm_segment_t oldfs = get_fs(); | |
2690 | ||
2691 | set_fs(KERNEL_DS); | |
2692 | err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL); | |
2693 | set_fs(oldfs); | |
2694 | } else | |
2695 | err = -EOPNOTSUPP; | |
1da177e4 LT |
2696 | |
2697 | if (err == 0) { | |
2698 | err = -ENOBUFS; | |
af284937 DL |
2699 | dev = __dev_get_by_name(net, p.name); |
2700 | if (!dev) | |
1da177e4 LT |
2701 | goto err_exit; |
2702 | err = dev_open(dev); | |
2703 | } | |
2704 | } | |
0be669bb | 2705 | #endif |
1da177e4 LT |
2706 | |
2707 | err_exit: | |
2708 | rtnl_unlock(); | |
2709 | return err; | |
2710 | } | |
2711 | ||
93a714d6 MC |
2712 | static int ipv6_mc_config(struct sock *sk, bool join, |
2713 | const struct in6_addr *addr, int ifindex) | |
2714 | { | |
2715 | int ret; | |
2716 | ||
2717 | ASSERT_RTNL(); | |
2718 | ||
2719 | lock_sock(sk); | |
2720 | if (join) | |
54ff9ef3 | 2721 | ret = ipv6_sock_mc_join(sk, ifindex, addr); |
93a714d6 | 2722 | else |
54ff9ef3 | 2723 | ret = ipv6_sock_mc_drop(sk, ifindex, addr); |
93a714d6 MC |
2724 | release_sock(sk); |
2725 | ||
2726 | return ret; | |
2727 | } | |
2728 | ||
1da177e4 LT |
2729 | /* |
2730 | * Manual configuration of address on an interface | |
2731 | */ | |
479840ff JP |
2732 | static int inet6_addr_add(struct net *net, int ifindex, |
2733 | const struct in6_addr *pfx, | |
caeaba79 | 2734 | const struct in6_addr *peer_pfx, |
479840ff JP |
2735 | unsigned int plen, __u32 ifa_flags, |
2736 | __u32 prefered_lft, __u32 valid_lft) | |
1da177e4 LT |
2737 | { |
2738 | struct inet6_ifaddr *ifp; | |
2739 | struct inet6_dev *idev; | |
2740 | struct net_device *dev; | |
93a714d6 MC |
2741 | unsigned long timeout; |
2742 | clock_t expires; | |
1da177e4 | 2743 | int scope; |
6f704992 | 2744 | u32 flags; |
1da177e4 LT |
2745 | |
2746 | ASSERT_RTNL(); | |
1ab1457c | 2747 | |
24ef0da7 TG |
2748 | if (plen > 128) |
2749 | return -EINVAL; | |
2750 | ||
0778769d NT |
2751 | /* check the lifetime */ |
2752 | if (!valid_lft || prefered_lft > valid_lft) | |
2753 | return -EINVAL; | |
2754 | ||
53bd6749 JP |
2755 | if (ifa_flags & IFA_F_MANAGETEMPADDR && plen != 64) |
2756 | return -EINVAL; | |
2757 | ||
af284937 DL |
2758 | dev = __dev_get_by_index(net, ifindex); |
2759 | if (!dev) | |
1da177e4 | 2760 | return -ENODEV; |
1ab1457c | 2761 | |
64e724f6 BH |
2762 | idev = addrconf_add_dev(dev); |
2763 | if (IS_ERR(idev)) | |
2764 | return PTR_ERR(idev); | |
1da177e4 | 2765 | |
93a714d6 MC |
2766 | if (ifa_flags & IFA_F_MCAUTOJOIN) { |
2767 | int ret = ipv6_mc_config(net->ipv6.mc_autojoin_sk, | |
2768 | true, pfx, ifindex); | |
2769 | ||
2770 | if (ret < 0) | |
2771 | return ret; | |
2772 | } | |
2773 | ||
1da177e4 LT |
2774 | scope = ipv6_addr_scope(pfx); |
2775 | ||
4bed72e4 YH |
2776 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
2777 | if (addrconf_finite_timeout(timeout)) { | |
2778 | expires = jiffies_to_clock_t(timeout * HZ); | |
2779 | valid_lft = timeout; | |
6f704992 | 2780 | flags = RTF_EXPIRES; |
4bed72e4 YH |
2781 | } else { |
2782 | expires = 0; | |
2783 | flags = 0; | |
2784 | ifa_flags |= IFA_F_PERMANENT; | |
6f704992 | 2785 | } |
0778769d | 2786 | |
4bed72e4 YH |
2787 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
2788 | if (addrconf_finite_timeout(timeout)) { | |
2789 | if (timeout == 0) | |
2790 | ifa_flags |= IFA_F_DEPRECATED; | |
2791 | prefered_lft = timeout; | |
2792 | } | |
0778769d | 2793 | |
8a226b2c JB |
2794 | ifp = ipv6_add_addr(idev, pfx, peer_pfx, plen, scope, ifa_flags, |
2795 | valid_lft, prefered_lft); | |
0778769d | 2796 | |
1da177e4 | 2797 | if (!IS_ERR(ifp)) { |
761aac73 TH |
2798 | if (!(ifa_flags & IFA_F_NOPREFIXROUTE)) { |
2799 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, | |
2800 | expires, flags); | |
2801 | } | |
2802 | ||
95c385b4 NH |
2803 | /* |
2804 | * Note that section 3.1 of RFC 4429 indicates | |
2805 | * that the Optimistic flag should not be set for | |
2806 | * manually configured addresses | |
2807 | */ | |
cf22f9a2 | 2808 | addrconf_dad_start(ifp); |
53bd6749 JP |
2809 | if (ifa_flags & IFA_F_MANAGETEMPADDR) |
2810 | manage_tempaddrs(idev, ifp, valid_lft, prefered_lft, | |
2811 | true, jiffies); | |
1da177e4 | 2812 | in6_ifa_put(ifp); |
c15b1cca | 2813 | addrconf_verify_rtnl(); |
1da177e4 | 2814 | return 0; |
93a714d6 MC |
2815 | } else if (ifa_flags & IFA_F_MCAUTOJOIN) { |
2816 | ipv6_mc_config(net->ipv6.mc_autojoin_sk, | |
2817 | false, pfx, ifindex); | |
1da177e4 LT |
2818 | } |
2819 | ||
2820 | return PTR_ERR(ifp); | |
2821 | } | |
2822 | ||
6046d5b4 HK |
2823 | static int inet6_addr_del(struct net *net, int ifindex, u32 ifa_flags, |
2824 | const struct in6_addr *pfx, unsigned int plen) | |
1da177e4 LT |
2825 | { |
2826 | struct inet6_ifaddr *ifp; | |
2827 | struct inet6_dev *idev; | |
2828 | struct net_device *dev; | |
1ab1457c | 2829 | |
24ef0da7 TG |
2830 | if (plen > 128) |
2831 | return -EINVAL; | |
2832 | ||
af284937 DL |
2833 | dev = __dev_get_by_index(net, ifindex); |
2834 | if (!dev) | |
1da177e4 LT |
2835 | return -ENODEV; |
2836 | ||
e5d08d71 | 2837 | idev = __in6_dev_get(dev); |
63159f29 | 2838 | if (!idev) |
1da177e4 LT |
2839 | return -ENXIO; |
2840 | ||
2841 | read_lock_bh(&idev->lock); | |
502a2ffd | 2842 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
1da177e4 LT |
2843 | if (ifp->prefix_len == plen && |
2844 | ipv6_addr_equal(pfx, &ifp->addr)) { | |
2845 | in6_ifa_hold(ifp); | |
2846 | read_unlock_bh(&idev->lock); | |
1ab1457c | 2847 | |
6046d5b4 HK |
2848 | if (!(ifp->flags & IFA_F_TEMPORARY) && |
2849 | (ifa_flags & IFA_F_MANAGETEMPADDR)) | |
2850 | manage_tempaddrs(idev, ifp, 0, 0, false, | |
2851 | jiffies); | |
1da177e4 | 2852 | ipv6_del_addr(ifp); |
6046d5b4 | 2853 | addrconf_verify_rtnl(); |
93a714d6 MC |
2854 | if (ipv6_addr_is_multicast(pfx)) { |
2855 | ipv6_mc_config(net->ipv6.mc_autojoin_sk, | |
2856 | false, pfx, dev->ifindex); | |
2857 | } | |
1da177e4 LT |
2858 | return 0; |
2859 | } | |
2860 | } | |
2861 | read_unlock_bh(&idev->lock); | |
2862 | return -EADDRNOTAVAIL; | |
2863 | } | |
2864 | ||
2865 | ||
af284937 | 2866 | int addrconf_add_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2867 | { |
2868 | struct in6_ifreq ireq; | |
2869 | int err; | |
1ab1457c | 2870 | |
af31f412 | 2871 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 | 2872 | return -EPERM; |
1ab1457c | 2873 | |
1da177e4 LT |
2874 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
2875 | return -EFAULT; | |
2876 | ||
2877 | rtnl_lock(); | |
caeaba79 | 2878 | err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, NULL, |
af284937 DL |
2879 | ireq.ifr6_prefixlen, IFA_F_PERMANENT, |
2880 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); | |
1da177e4 LT |
2881 | rtnl_unlock(); |
2882 | return err; | |
2883 | } | |
2884 | ||
af284937 | 2885 | int addrconf_del_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
2886 | { |
2887 | struct in6_ifreq ireq; | |
2888 | int err; | |
1ab1457c | 2889 | |
af31f412 | 2890 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 LT |
2891 | return -EPERM; |
2892 | ||
2893 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
2894 | return -EFAULT; | |
2895 | ||
2896 | rtnl_lock(); | |
6046d5b4 | 2897 | err = inet6_addr_del(net, ireq.ifr6_ifindex, 0, &ireq.ifr6_addr, |
af284937 | 2898 | ireq.ifr6_prefixlen); |
1da177e4 LT |
2899 | rtnl_unlock(); |
2900 | return err; | |
2901 | } | |
2902 | ||
b5f348e5 IJ |
2903 | static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr, |
2904 | int plen, int scope) | |
2905 | { | |
2906 | struct inet6_ifaddr *ifp; | |
2907 | ||
8a226b2c | 2908 | ifp = ipv6_add_addr(idev, addr, NULL, plen, |
07edd741 HFS |
2909 | scope, IFA_F_PERMANENT, |
2910 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); | |
b5f348e5 IJ |
2911 | if (!IS_ERR(ifp)) { |
2912 | spin_lock_bh(&ifp->lock); | |
2913 | ifp->flags &= ~IFA_F_TENTATIVE; | |
2914 | spin_unlock_bh(&ifp->lock); | |
764d3be6 | 2915 | rt_genid_bump_ipv6(dev_net(idev->dev)); |
b5f348e5 IJ |
2916 | ipv6_ifa_notify(RTM_NEWADDR, ifp); |
2917 | in6_ifa_put(ifp); | |
2918 | } | |
2919 | } | |
2920 | ||
07a93626 | 2921 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 LT |
2922 | static void sit_add_v4_addrs(struct inet6_dev *idev) |
2923 | { | |
1da177e4 LT |
2924 | struct in6_addr addr; |
2925 | struct net_device *dev; | |
c346dca1 | 2926 | struct net *net = dev_net(idev->dev); |
929c9cf3 | 2927 | int scope, plen; |
f0e2acfa | 2928 | u32 pflags = 0; |
1da177e4 LT |
2929 | |
2930 | ASSERT_RTNL(); | |
2931 | ||
2932 | memset(&addr, 0, sizeof(struct in6_addr)); | |
2933 | memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); | |
2934 | ||
2935 | if (idev->dev->flags&IFF_POINTOPOINT) { | |
2936 | addr.s6_addr32[0] = htonl(0xfe800000); | |
2937 | scope = IFA_LINK; | |
929c9cf3 | 2938 | plen = 64; |
1da177e4 LT |
2939 | } else { |
2940 | scope = IPV6_ADDR_COMPATv4; | |
929c9cf3 | 2941 | plen = 96; |
f0e2acfa | 2942 | pflags |= RTF_NONEXTHOP; |
1da177e4 LT |
2943 | } |
2944 | ||
2945 | if (addr.s6_addr32[3]) { | |
929c9cf3 | 2946 | add_addr(idev, &addr, plen, scope); |
f0e2acfa | 2947 | addrconf_prefix_route(&addr, plen, idev->dev, 0, pflags); |
1da177e4 LT |
2948 | return; |
2949 | } | |
2950 | ||
6fda7350 | 2951 | for_each_netdev(net, dev) { |
8e5e8f30 | 2952 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
1da177e4 | 2953 | if (in_dev && (dev->flags & IFF_UP)) { |
8e5e8f30 | 2954 | struct in_ifaddr *ifa; |
1da177e4 LT |
2955 | |
2956 | int flag = scope; | |
2957 | ||
2958 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { | |
1da177e4 LT |
2959 | |
2960 | addr.s6_addr32[3] = ifa->ifa_local; | |
2961 | ||
2962 | if (ifa->ifa_scope == RT_SCOPE_LINK) | |
2963 | continue; | |
2964 | if (ifa->ifa_scope >= RT_SCOPE_HOST) { | |
2965 | if (idev->dev->flags&IFF_POINTOPOINT) | |
2966 | continue; | |
2967 | flag |= IFA_HOST; | |
2968 | } | |
1da177e4 | 2969 | |
b5f348e5 | 2970 | add_addr(idev, &addr, plen, flag); |
f0e2acfa ND |
2971 | addrconf_prefix_route(&addr, plen, idev->dev, 0, |
2972 | pflags); | |
1da177e4 LT |
2973 | } |
2974 | } | |
1ab1457c | 2975 | } |
1da177e4 | 2976 | } |
0be669bb | 2977 | #endif |
1da177e4 LT |
2978 | |
2979 | static void init_loopback(struct net_device *dev) | |
2980 | { | |
2981 | struct inet6_dev *idev; | |
25fb6ca4 BK |
2982 | struct net_device *sp_dev; |
2983 | struct inet6_ifaddr *sp_ifa; | |
2984 | struct rt6_info *sp_rt; | |
1da177e4 LT |
2985 | |
2986 | /* ::1 */ | |
2987 | ||
2988 | ASSERT_RTNL(); | |
2989 | ||
e5d08d71 | 2990 | idev = ipv6_find_idev(dev); |
63159f29 | 2991 | if (!idev) { |
91df42be | 2992 | pr_debug("%s: add_dev failed\n", __func__); |
1da177e4 LT |
2993 | return; |
2994 | } | |
2995 | ||
b5f348e5 | 2996 | add_addr(idev, &in6addr_loopback, 128, IFA_HOST); |
25fb6ca4 BK |
2997 | |
2998 | /* Add routes to other interface's IPv6 addresses */ | |
2999 | for_each_netdev(dev_net(dev), sp_dev) { | |
3000 | if (!strcmp(sp_dev->name, dev->name)) | |
3001 | continue; | |
3002 | ||
3003 | idev = __in6_dev_get(sp_dev); | |
3004 | if (!idev) | |
3005 | continue; | |
3006 | ||
3007 | read_lock_bh(&idev->lock); | |
3008 | list_for_each_entry(sp_ifa, &idev->addr_list, if_list) { | |
3009 | ||
3010 | if (sp_ifa->flags & (IFA_F_DADFAILED | IFA_F_TENTATIVE)) | |
3011 | continue; | |
3012 | ||
33d99113 G |
3013 | if (sp_ifa->rt) { |
3014 | /* This dst has been added to garbage list when | |
3015 | * lo device down, release this obsolete dst and | |
3016 | * reallocate a new router for ifa. | |
3017 | */ | |
a220445f | 3018 | if (!atomic_read(&sp_ifa->rt->rt6i_ref)) { |
33d99113 G |
3019 | ip6_rt_put(sp_ifa->rt); |
3020 | sp_ifa->rt = NULL; | |
3021 | } else { | |
3022 | continue; | |
3023 | } | |
3024 | } | |
a881ae1f | 3025 | |
57ec0afe | 3026 | sp_rt = addrconf_dst_alloc(idev, &sp_ifa->addr, false); |
25fb6ca4 BK |
3027 | |
3028 | /* Failure cases are ignored */ | |
534c8779 G |
3029 | if (!IS_ERR(sp_rt)) { |
3030 | sp_ifa->rt = sp_rt; | |
25fb6ca4 | 3031 | ip6_ins_rt(sp_rt); |
534c8779 | 3032 | } |
25fb6ca4 BK |
3033 | } |
3034 | read_unlock_bh(&idev->lock); | |
3035 | } | |
1da177e4 LT |
3036 | } |
3037 | ||
2ad3ed59 AA |
3038 | void addrconf_add_linklocal(struct inet6_dev *idev, |
3039 | const struct in6_addr *addr, u32 flags) | |
1da177e4 | 3040 | { |
8e5e8f30 | 3041 | struct inet6_ifaddr *ifp; |
64236f3f | 3042 | u32 addr_flags = flags | IFA_F_PERMANENT; |
95c385b4 NH |
3043 | |
3044 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
3045 | if (idev->cnf.optimistic_dad && | |
702beb87 | 3046 | !dev_net(idev->dev)->ipv6.devconf_all->forwarding) |
95c385b4 NH |
3047 | addr_flags |= IFA_F_OPTIMISTIC; |
3048 | #endif | |
1da177e4 | 3049 | |
07edd741 HFS |
3050 | ifp = ipv6_add_addr(idev, addr, NULL, 64, IFA_LINK, addr_flags, |
3051 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); | |
1da177e4 | 3052 | if (!IS_ERR(ifp)) { |
46d48046 | 3053 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0); |
cf22f9a2 | 3054 | addrconf_dad_start(ifp); |
1da177e4 LT |
3055 | in6_ifa_put(ifp); |
3056 | } | |
3057 | } | |
2ad3ed59 | 3058 | EXPORT_SYMBOL_GPL(addrconf_add_linklocal); |
1da177e4 | 3059 | |
622c81d5 HFS |
3060 | static bool ipv6_reserved_interfaceid(struct in6_addr address) |
3061 | { | |
3062 | if ((address.s6_addr32[2] | address.s6_addr32[3]) == 0) | |
3063 | return true; | |
3064 | ||
3065 | if (address.s6_addr32[2] == htonl(0x02005eff) && | |
3066 | ((address.s6_addr32[3] & htonl(0xfe000000)) == htonl(0xfe000000))) | |
3067 | return true; | |
3068 | ||
3069 | if (address.s6_addr32[2] == htonl(0xfdffffff) && | |
3070 | ((address.s6_addr32[3] & htonl(0xffffff80)) == htonl(0xffffff80))) | |
3071 | return true; | |
3072 | ||
3073 | return false; | |
3074 | } | |
3075 | ||
3076 | static int ipv6_generate_stable_address(struct in6_addr *address, | |
3077 | u8 dad_count, | |
3078 | const struct inet6_dev *idev) | |
3079 | { | |
622c81d5 HFS |
3080 | static DEFINE_SPINLOCK(lock); |
3081 | static __u32 digest[SHA_DIGEST_WORDS]; | |
3082 | static __u32 workspace[SHA_WORKSPACE_WORDS]; | |
3083 | ||
3084 | static union { | |
3085 | char __data[SHA_MESSAGE_BYTES]; | |
3086 | struct { | |
3087 | struct in6_addr secret; | |
ff40217e | 3088 | __be32 prefix[2]; |
622c81d5 HFS |
3089 | unsigned char hwaddr[MAX_ADDR_LEN]; |
3090 | u8 dad_count; | |
3091 | } __packed; | |
3092 | } data; | |
3093 | ||
3094 | struct in6_addr secret; | |
3095 | struct in6_addr temp; | |
3096 | struct net *net = dev_net(idev->dev); | |
3097 | ||
3098 | BUILD_BUG_ON(sizeof(data.__data) != sizeof(data)); | |
3099 | ||
3100 | if (idev->cnf.stable_secret.initialized) | |
3101 | secret = idev->cnf.stable_secret.secret; | |
3102 | else if (net->ipv6.devconf_dflt->stable_secret.initialized) | |
3103 | secret = net->ipv6.devconf_dflt->stable_secret.secret; | |
3104 | else | |
3105 | return -1; | |
3106 | ||
3107 | retry: | |
3108 | spin_lock_bh(&lock); | |
3109 | ||
3110 | sha_init(digest); | |
3111 | memset(&data, 0, sizeof(data)); | |
3112 | memset(workspace, 0, sizeof(workspace)); | |
3113 | memcpy(data.hwaddr, idev->dev->perm_addr, idev->dev->addr_len); | |
ff40217e HFS |
3114 | data.prefix[0] = address->s6_addr32[0]; |
3115 | data.prefix[1] = address->s6_addr32[1]; | |
622c81d5 HFS |
3116 | data.secret = secret; |
3117 | data.dad_count = dad_count; | |
3118 | ||
3119 | sha_transform(digest, data.__data, workspace); | |
3120 | ||
3121 | temp = *address; | |
ff40217e HFS |
3122 | temp.s6_addr32[2] = (__force __be32)digest[0]; |
3123 | temp.s6_addr32[3] = (__force __be32)digest[1]; | |
622c81d5 HFS |
3124 | |
3125 | spin_unlock_bh(&lock); | |
3126 | ||
3127 | if (ipv6_reserved_interfaceid(temp)) { | |
3128 | dad_count++; | |
1855b7c3 | 3129 | if (dad_count > dev_net(idev->dev)->ipv6.sysctl.idgen_retries) |
622c81d5 HFS |
3130 | return -1; |
3131 | goto retry; | |
3132 | } | |
3133 | ||
3134 | *address = temp; | |
3135 | return 0; | |
3136 | } | |
3137 | ||
cc9da6cc BM |
3138 | static void ipv6_gen_mode_random_init(struct inet6_dev *idev) |
3139 | { | |
3140 | struct ipv6_stable_secret *s = &idev->cnf.stable_secret; | |
3141 | ||
3142 | if (s->initialized) | |
3143 | return; | |
3144 | s = &idev->cnf.stable_secret; | |
3145 | get_random_bytes(&s->secret, sizeof(s->secret)); | |
3146 | s->initialized = true; | |
3147 | } | |
3148 | ||
bc91b0f0 JP |
3149 | static void addrconf_addr_gen(struct inet6_dev *idev, bool prefix_route) |
3150 | { | |
622c81d5 HFS |
3151 | struct in6_addr addr; |
3152 | ||
ca254490 DA |
3153 | /* no link local addresses on L3 master devices */ |
3154 | if (netif_is_l3_master(idev->dev)) | |
3155 | return; | |
3156 | ||
622c81d5 | 3157 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); |
bc91b0f0 | 3158 | |
d35a00b8 | 3159 | switch (idev->cnf.addr_gen_mode) { |
cc9da6cc BM |
3160 | case IN6_ADDR_GEN_MODE_RANDOM: |
3161 | ipv6_gen_mode_random_init(idev); | |
3162 | /* fallthrough */ | |
3163 | case IN6_ADDR_GEN_MODE_STABLE_PRIVACY: | |
622c81d5 | 3164 | if (!ipv6_generate_stable_address(&addr, 0, idev)) |
64236f3f HFS |
3165 | addrconf_add_linklocal(idev, &addr, |
3166 | IFA_F_STABLE_PRIVACY); | |
622c81d5 HFS |
3167 | else if (prefix_route) |
3168 | addrconf_prefix_route(&addr, 64, idev->dev, 0, 0); | |
cc9da6cc BM |
3169 | break; |
3170 | case IN6_ADDR_GEN_MODE_EUI64: | |
bc91b0f0 JP |
3171 | /* addrconf_add_linklocal also adds a prefix_route and we |
3172 | * only need to care about prefix routes if ipv6_generate_eui64 | |
3173 | * couldn't generate one. | |
3174 | */ | |
3175 | if (ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) == 0) | |
64236f3f | 3176 | addrconf_add_linklocal(idev, &addr, 0); |
bc91b0f0 JP |
3177 | else if (prefix_route) |
3178 | addrconf_prefix_route(&addr, 64, idev->dev, 0, 0); | |
cc9da6cc BM |
3179 | break; |
3180 | case IN6_ADDR_GEN_MODE_NONE: | |
3181 | default: | |
3182 | /* will not add any link local address */ | |
3183 | break; | |
bc91b0f0 JP |
3184 | } |
3185 | } | |
3186 | ||
1da177e4 LT |
3187 | static void addrconf_dev_config(struct net_device *dev) |
3188 | { | |
8e5e8f30 | 3189 | struct inet6_dev *idev; |
1da177e4 LT |
3190 | |
3191 | ASSERT_RTNL(); | |
3192 | ||
74235a25 HX |
3193 | if ((dev->type != ARPHRD_ETHER) && |
3194 | (dev->type != ARPHRD_FDDI) && | |
74235a25 | 3195 | (dev->type != ARPHRD_ARCNET) && |
06a4c1c5 | 3196 | (dev->type != ARPHRD_INFINIBAND) && |
e837735e | 3197 | (dev->type != ARPHRD_IEEE1394) && |
e74bccb8 | 3198 | (dev->type != ARPHRD_TUNNEL6) && |
cc9da6cc | 3199 | (dev->type != ARPHRD_6LOWPAN) && |
45ce0fd1 FJ |
3200 | (dev->type != ARPHRD_IP6GRE) && |
3201 | (dev->type != ARPHRD_IPGRE) && | |
3202 | (dev->type != ARPHRD_TUNNEL) && | |
cc9da6cc | 3203 | (dev->type != ARPHRD_NONE)) { |
74235a25 HX |
3204 | /* Alas, we support only Ethernet autoconfiguration. */ |
3205 | return; | |
3206 | } | |
3207 | ||
1da177e4 | 3208 | idev = addrconf_add_dev(dev); |
64e724f6 | 3209 | if (IS_ERR(idev)) |
1da177e4 LT |
3210 | return; |
3211 | ||
cc9da6cc BM |
3212 | /* this device type has no EUI support */ |
3213 | if (dev->type == ARPHRD_NONE && | |
d35a00b8 FJ |
3214 | idev->cnf.addr_gen_mode == IN6_ADDR_GEN_MODE_EUI64) |
3215 | idev->cnf.addr_gen_mode = IN6_ADDR_GEN_MODE_RANDOM; | |
cc9da6cc | 3216 | |
bc91b0f0 | 3217 | addrconf_addr_gen(idev, false); |
1da177e4 LT |
3218 | } |
3219 | ||
07a93626 | 3220 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 LT |
3221 | static void addrconf_sit_config(struct net_device *dev) |
3222 | { | |
3223 | struct inet6_dev *idev; | |
3224 | ||
3225 | ASSERT_RTNL(); | |
3226 | ||
1ab1457c YH |
3227 | /* |
3228 | * Configure the tunnel with one of our IPv4 | |
3229 | * addresses... we should configure all of | |
1da177e4 LT |
3230 | * our v4 addrs in the tunnel |
3231 | */ | |
3232 | ||
e5d08d71 | 3233 | idev = ipv6_find_idev(dev); |
63159f29 | 3234 | if (!idev) { |
91df42be | 3235 | pr_debug("%s: add_dev failed\n", __func__); |
1da177e4 LT |
3236 | return; |
3237 | } | |
3238 | ||
c7dc89c0 | 3239 | if (dev->priv_flags & IFF_ISATAP) { |
bc91b0f0 | 3240 | addrconf_addr_gen(idev, false); |
c7dc89c0 FT |
3241 | return; |
3242 | } | |
3243 | ||
1da177e4 LT |
3244 | sit_add_v4_addrs(idev); |
3245 | ||
62b54dd9 | 3246 | if (dev->flags&IFF_POINTOPOINT) |
1da177e4 | 3247 | addrconf_add_mroute(dev); |
1da177e4 | 3248 | } |
0be669bb | 3249 | #endif |
1da177e4 | 3250 | |
07a93626 | 3251 | #if IS_ENABLED(CONFIG_NET_IPGRE) |
aee80b54 | 3252 | static void addrconf_gre_config(struct net_device *dev) |
3253 | { | |
3254 | struct inet6_dev *idev; | |
aee80b54 | 3255 | |
aee80b54 | 3256 | ASSERT_RTNL(); |
3257 | ||
e5d08d71 | 3258 | idev = ipv6_find_idev(dev); |
63159f29 | 3259 | if (!idev) { |
91df42be | 3260 | pr_debug("%s: add_dev failed\n", __func__); |
aee80b54 | 3261 | return; |
3262 | } | |
3263 | ||
bc91b0f0 | 3264 | addrconf_addr_gen(idev, true); |
d9e4ce65 HFS |
3265 | if (dev->flags & IFF_POINTOPOINT) |
3266 | addrconf_add_mroute(dev); | |
aee80b54 | 3267 | } |
3268 | #endif | |
3269 | ||
f1705ec1 DA |
3270 | static int fixup_permanent_addr(struct inet6_dev *idev, |
3271 | struct inet6_ifaddr *ifp) | |
3272 | { | |
3273 | if (!ifp->rt) { | |
3274 | struct rt6_info *rt; | |
3275 | ||
3276 | rt = addrconf_dst_alloc(idev, &ifp->addr, false); | |
3277 | if (unlikely(IS_ERR(rt))) | |
3278 | return PTR_ERR(rt); | |
3279 | ||
3280 | ifp->rt = rt; | |
3281 | } | |
3282 | ||
3283 | if (!(ifp->flags & IFA_F_NOPREFIXROUTE)) { | |
3284 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, | |
3285 | idev->dev, 0, 0); | |
3286 | } | |
3287 | ||
3288 | addrconf_dad_start(ifp); | |
3289 | ||
3290 | return 0; | |
3291 | } | |
3292 | ||
3293 | static void addrconf_permanent_addr(struct net_device *dev) | |
3294 | { | |
3295 | struct inet6_ifaddr *ifp, *tmp; | |
3296 | struct inet6_dev *idev; | |
3297 | ||
3298 | idev = __in6_dev_get(dev); | |
3299 | if (!idev) | |
3300 | return; | |
3301 | ||
3302 | write_lock_bh(&idev->lock); | |
3303 | ||
3304 | list_for_each_entry_safe(ifp, tmp, &idev->addr_list, if_list) { | |
3305 | if ((ifp->flags & IFA_F_PERMANENT) && | |
3306 | fixup_permanent_addr(idev, ifp) < 0) { | |
3307 | write_unlock_bh(&idev->lock); | |
3308 | ipv6_del_addr(ifp); | |
3309 | write_lock_bh(&idev->lock); | |
3310 | ||
3311 | net_info_ratelimited("%s: Failed to add prefix route for address %pI6c; dropping\n", | |
3312 | idev->dev->name, &ifp->addr); | |
3313 | } | |
3314 | } | |
3315 | ||
3316 | write_unlock_bh(&idev->lock); | |
3317 | } | |
3318 | ||
1ab1457c | 3319 | static int addrconf_notify(struct notifier_block *this, unsigned long event, |
351638e7 | 3320 | void *ptr) |
1da177e4 | 3321 | { |
351638e7 | 3322 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
4f7f34ea | 3323 | struct netdev_notifier_changeupper_info *info; |
748e2d93 | 3324 | struct inet6_dev *idev = __in6_dev_get(dev); |
c5e33bdd | 3325 | int run_pending = 0; |
b217d616 | 3326 | int err; |
1da177e4 | 3327 | |
e21e8467 | 3328 | switch (event) { |
45ba9dd2 | 3329 | case NETDEV_REGISTER: |
74235a25 | 3330 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
45ba9dd2 | 3331 | idev = ipv6_add_dev(dev); |
a317a2f1 WC |
3332 | if (IS_ERR(idev)) |
3333 | return notifier_from_errno(PTR_ERR(idev)); | |
45ba9dd2 YH |
3334 | } |
3335 | break; | |
bcdd553f | 3336 | |
b7b0b1d2 AD |
3337 | case NETDEV_CHANGEMTU: |
3338 | /* if MTU under IPV6_MIN_MTU stop IPv6 on this interface. */ | |
3339 | if (dev->mtu < IPV6_MIN_MTU) { | |
3340 | addrconf_ifdown(dev, 1); | |
3341 | break; | |
3342 | } | |
3343 | ||
3344 | if (idev) { | |
3345 | rt6_mtu_change(dev, dev->mtu); | |
3346 | idev->cnf.mtu6 = dev->mtu; | |
3347 | break; | |
3348 | } | |
3349 | ||
3350 | /* allocate new idev */ | |
3351 | idev = ipv6_add_dev(dev); | |
3352 | if (IS_ERR(idev)) | |
3353 | break; | |
3354 | ||
3355 | /* device is still not ready */ | |
3356 | if (!(idev->if_flags & IF_READY)) | |
3357 | break; | |
3358 | ||
3359 | run_pending = 1; | |
3360 | ||
3361 | /* fall through */ | |
3362 | ||
1da177e4 | 3363 | case NETDEV_UP: |
3c21edbd | 3364 | case NETDEV_CHANGE: |
c2edacf8 JV |
3365 | if (dev->flags & IFF_SLAVE) |
3366 | break; | |
3367 | ||
3ce62a84 WC |
3368 | if (idev && idev->cnf.disable_ipv6) |
3369 | break; | |
3370 | ||
3c21edbd | 3371 | if (event == NETDEV_UP) { |
38bd10c4 DA |
3372 | /* restore routes for permanent addresses */ |
3373 | addrconf_permanent_addr(dev); | |
3374 | ||
f24e3d65 | 3375 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd | 3376 | /* device is not ready yet. */ |
f3213831 | 3377 | pr_info("ADDRCONF(NETDEV_UP): %s: link is not ready\n", |
3c21edbd YH |
3378 | dev->name); |
3379 | break; | |
3380 | } | |
99081049 | 3381 | |
d31c7b8f EP |
3382 | if (!idev && dev->mtu >= IPV6_MIN_MTU) |
3383 | idev = ipv6_add_dev(dev); | |
3384 | ||
a317a2f1 | 3385 | if (!IS_ERR_OR_NULL(idev)) { |
99081049 | 3386 | idev->if_flags |= IF_READY; |
e3ec6cfc BT |
3387 | run_pending = 1; |
3388 | } | |
b7b0b1d2 | 3389 | } else if (event == NETDEV_CHANGE) { |
f24e3d65 | 3390 | if (!addrconf_qdisc_ok(dev)) { |
3c21edbd YH |
3391 | /* device is still not ready. */ |
3392 | break; | |
3393 | } | |
3394 | ||
3395 | if (idev) { | |
a088d1d7 LL |
3396 | if (idev->if_flags & IF_READY) { |
3397 | /* device is already configured - | |
3398 | * but resend MLD reports, we might | |
3399 | * have roamed and need to update | |
3400 | * multicast snooping switches | |
3401 | */ | |
3402 | ipv6_mc_up(idev); | |
3c21edbd | 3403 | break; |
a088d1d7 | 3404 | } |
3c21edbd YH |
3405 | idev->if_flags |= IF_READY; |
3406 | } | |
3407 | ||
f3213831 JP |
3408 | pr_info("ADDRCONF(NETDEV_CHANGE): %s: link becomes ready\n", |
3409 | dev->name); | |
3c21edbd | 3410 | |
c5e33bdd | 3411 | run_pending = 1; |
3c21edbd YH |
3412 | } |
3413 | ||
e21e8467 | 3414 | switch (dev->type) { |
07a93626 | 3415 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 LT |
3416 | case ARPHRD_SIT: |
3417 | addrconf_sit_config(dev); | |
3418 | break; | |
aee80b54 | 3419 | #endif |
07a93626 | 3420 | #if IS_ENABLED(CONFIG_NET_IPGRE) |
aee80b54 | 3421 | case ARPHRD_IPGRE: |
3422 | addrconf_gre_config(dev); | |
3423 | break; | |
0be669bb | 3424 | #endif |
1da177e4 LT |
3425 | case ARPHRD_LOOPBACK: |
3426 | init_loopback(dev); | |
3427 | break; | |
3428 | ||
3429 | default: | |
3430 | addrconf_dev_config(dev); | |
3431 | break; | |
3ff50b79 | 3432 | } |
bcdd553f | 3433 | |
a317a2f1 | 3434 | if (!IS_ERR_OR_NULL(idev)) { |
c5e33bdd YH |
3435 | if (run_pending) |
3436 | addrconf_dad_run(idev); | |
3437 | ||
bcdd553f SH |
3438 | /* |
3439 | * If the MTU changed during the interface down, | |
3440 | * when the interface up, the changed MTU must be | |
3441 | * reflected in the idev as well as routers. | |
1da177e4 | 3442 | */ |
bcdd553f SH |
3443 | if (idev->cnf.mtu6 != dev->mtu && |
3444 | dev->mtu >= IPV6_MIN_MTU) { | |
1da177e4 LT |
3445 | rt6_mtu_change(dev, dev->mtu); |
3446 | idev->cnf.mtu6 = dev->mtu; | |
3447 | } | |
3448 | idev->tstamp = jiffies; | |
3449 | inet6_ifinfo_notify(RTM_NEWLINK, idev); | |
bcdd553f SH |
3450 | |
3451 | /* | |
3452 | * If the changed mtu during down is lower than | |
3453 | * IPV6_MIN_MTU stop IPv6 on this interface. | |
1da177e4 LT |
3454 | */ |
3455 | if (dev->mtu < IPV6_MIN_MTU) | |
bcdd553f | 3456 | addrconf_ifdown(dev, 1); |
1da177e4 LT |
3457 | } |
3458 | break; | |
3459 | ||
1da177e4 LT |
3460 | case NETDEV_DOWN: |
3461 | case NETDEV_UNREGISTER: | |
3462 | /* | |
3463 | * Remove all addresses from this interface. | |
3464 | */ | |
3465 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
3466 | break; | |
3c21edbd | 3467 | |
1da177e4 | 3468 | case NETDEV_CHANGENAME: |
1da177e4 | 3469 | if (idev) { |
5632c515 | 3470 | snmp6_unregister_dev(idev); |
408c4768 | 3471 | addrconf_sysctl_unregister(idev); |
a317a2f1 | 3472 | err = addrconf_sysctl_register(idev); |
b217d616 HX |
3473 | if (err) |
3474 | return notifier_from_errno(err); | |
a317a2f1 WC |
3475 | err = snmp6_register_dev(idev); |
3476 | if (err) { | |
3477 | addrconf_sysctl_unregister(idev); | |
3478 | return notifier_from_errno(err); | |
3479 | } | |
5632c515 | 3480 | } |
1da177e4 | 3481 | break; |
bcdd553f | 3482 | |
93d9b7d7 JP |
3483 | case NETDEV_PRE_TYPE_CHANGE: |
3484 | case NETDEV_POST_TYPE_CHANGE: | |
3ef0952c AL |
3485 | if (idev) |
3486 | addrconf_type_change(dev, event); | |
75c78500 | 3487 | break; |
4f7f34ea DA |
3488 | |
3489 | case NETDEV_CHANGEUPPER: | |
3490 | info = ptr; | |
3491 | ||
3492 | /* flush all routes if dev is linked to or unlinked from | |
3493 | * an L3 master device (e.g., VRF) | |
3494 | */ | |
3495 | if (info->upper_dev && netif_is_l3_master(info->upper_dev)) | |
3496 | addrconf_ifdown(dev, 0); | |
3ff50b79 | 3497 | } |
1da177e4 LT |
3498 | |
3499 | return NOTIFY_OK; | |
3500 | } | |
3501 | ||
3502 | /* | |
3503 | * addrconf module should be notified of a device going up | |
3504 | */ | |
3505 | static struct notifier_block ipv6_dev_notf = { | |
3506 | .notifier_call = addrconf_notify, | |
1da177e4 LT |
3507 | }; |
3508 | ||
93d9b7d7 | 3509 | static void addrconf_type_change(struct net_device *dev, unsigned long event) |
75c78500 MS |
3510 | { |
3511 | struct inet6_dev *idev; | |
3512 | ASSERT_RTNL(); | |
3513 | ||
3514 | idev = __in6_dev_get(dev); | |
3515 | ||
93d9b7d7 | 3516 | if (event == NETDEV_POST_TYPE_CHANGE) |
75c78500 | 3517 | ipv6_mc_remap(idev); |
93d9b7d7 | 3518 | else if (event == NETDEV_PRE_TYPE_CHANGE) |
75c78500 MS |
3519 | ipv6_mc_unmap(idev); |
3520 | } | |
3521 | ||
70af921d DA |
3522 | static bool addr_is_local(const struct in6_addr *addr) |
3523 | { | |
3524 | return ipv6_addr_type(addr) & | |
3525 | (IPV6_ADDR_LINKLOCAL | IPV6_ADDR_LOOPBACK); | |
3526 | } | |
3527 | ||
1da177e4 LT |
3528 | static int addrconf_ifdown(struct net_device *dev, int how) |
3529 | { | |
c346dca1 | 3530 | struct net *net = dev_net(dev); |
502a2ffd | 3531 | struct inet6_dev *idev; |
f1705ec1 DA |
3532 | struct inet6_ifaddr *ifa, *tmp; |
3533 | struct list_head del_list; | |
3534 | int _keep_addr; | |
3535 | bool keep_addr; | |
73a8bd74 | 3536 | int state, i; |
1da177e4 LT |
3537 | |
3538 | ASSERT_RTNL(); | |
3539 | ||
73a8bd74 DM |
3540 | rt6_ifdown(net, dev); |
3541 | neigh_ifdown(&nd_tbl, dev); | |
1da177e4 LT |
3542 | |
3543 | idev = __in6_dev_get(dev); | |
63159f29 | 3544 | if (!idev) |
1da177e4 LT |
3545 | return -ENODEV; |
3546 | ||
bcdd553f SH |
3547 | /* |
3548 | * Step 1: remove reference to ipv6 device from parent device. | |
3549 | * Do not dev_put! | |
1da177e4 | 3550 | */ |
439e2385 | 3551 | if (how) { |
1da177e4 | 3552 | idev->dead = 1; |
8814c4b5 YH |
3553 | |
3554 | /* protected by rtnl_lock */ | |
a9b3cd7f | 3555 | RCU_INIT_POINTER(dev->ip6_ptr, NULL); |
1da177e4 LT |
3556 | |
3557 | /* Step 1.5: remove snmp6 entry */ | |
3558 | snmp6_unregister_dev(idev); | |
3559 | ||
3560 | } | |
3561 | ||
f1705ec1 DA |
3562 | /* aggregate the system setting and interface setting */ |
3563 | _keep_addr = net->ipv6.devconf_all->keep_addr_on_down; | |
3564 | if (!_keep_addr) | |
3565 | _keep_addr = idev->cnf.keep_addr_on_down; | |
3566 | ||
3567 | /* combine the user config with event to determine if permanent | |
3568 | * addresses are to be removed from address hash table | |
3569 | */ | |
bc561632 | 3570 | keep_addr = !(how || _keep_addr <= 0 || idev->cnf.disable_ipv6); |
f1705ec1 | 3571 | |
73a8bd74 DM |
3572 | /* Step 2: clear hash table */ |
3573 | for (i = 0; i < IN6_ADDR_HSIZE; i++) { | |
3574 | struct hlist_head *h = &inet6_addr_lst[i]; | |
73a8bd74 DM |
3575 | |
3576 | spin_lock_bh(&addrconf_hash_lock); | |
67ba4152 | 3577 | restart: |
b67bfe0d | 3578 | hlist_for_each_entry_rcu(ifa, h, addr_lst) { |
73a8bd74 | 3579 | if (ifa->idev == idev) { |
c15b1cca | 3580 | addrconf_del_dad_work(ifa); |
f1705ec1 DA |
3581 | /* combined flag + permanent flag decide if |
3582 | * address is retained on a down event | |
3583 | */ | |
3584 | if (!keep_addr || | |
70af921d DA |
3585 | !(ifa->flags & IFA_F_PERMANENT) || |
3586 | addr_is_local(&ifa->addr)) { | |
f1705ec1 DA |
3587 | hlist_del_init_rcu(&ifa->addr_lst); |
3588 | goto restart; | |
3589 | } | |
73a8bd74 DM |
3590 | } |
3591 | } | |
3592 | spin_unlock_bh(&addrconf_hash_lock); | |
3593 | } | |
3594 | ||
1da177e4 LT |
3595 | write_lock_bh(&idev->lock); |
3596 | ||
b7b1bfce HFS |
3597 | addrconf_del_rs_timer(idev); |
3598 | ||
bcdd553f | 3599 | /* Step 2: clear flags for stateless addrconf */ |
439e2385 | 3600 | if (!how) |
3c21edbd | 3601 | idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); |
1da177e4 | 3602 | |
bcdd553f | 3603 | /* Step 3: clear tempaddr list */ |
372e6c8f | 3604 | while (!list_empty(&idev->tempaddr_list)) { |
3605 | ifa = list_first_entry(&idev->tempaddr_list, | |
3606 | struct inet6_ifaddr, tmp_list); | |
3607 | list_del(&ifa->tmp_list); | |
1da177e4 LT |
3608 | write_unlock_bh(&idev->lock); |
3609 | spin_lock_bh(&ifa->lock); | |
3610 | ||
3611 | if (ifa->ifpub) { | |
3612 | in6_ifa_put(ifa->ifpub); | |
3613 | ifa->ifpub = NULL; | |
3614 | } | |
3615 | spin_unlock_bh(&ifa->lock); | |
3616 | in6_ifa_put(ifa); | |
3617 | write_lock_bh(&idev->lock); | |
3618 | } | |
8f37ada5 | 3619 | |
f1705ec1 DA |
3620 | /* re-combine the user config with event to determine if permanent |
3621 | * addresses are to be removed from the interface list | |
3622 | */ | |
bc561632 | 3623 | keep_addr = (!how && _keep_addr > 0 && !idev->cnf.disable_ipv6); |
84e8b803 | 3624 | |
f1705ec1 DA |
3625 | INIT_LIST_HEAD(&del_list); |
3626 | list_for_each_entry_safe(ifa, tmp, &idev->addr_list, if_list) { | |
38bd10c4 DA |
3627 | struct rt6_info *rt = NULL; |
3628 | ||
f1705ec1 | 3629 | addrconf_del_dad_work(ifa); |
84e8b803 | 3630 | |
73a8bd74 | 3631 | write_unlock_bh(&idev->lock); |
8e8e676d | 3632 | spin_lock_bh(&ifa->lock); |
f1705ec1 | 3633 | |
70af921d DA |
3634 | if (keep_addr && (ifa->flags & IFA_F_PERMANENT) && |
3635 | !addr_is_local(&ifa->addr)) { | |
f1705ec1 DA |
3636 | /* set state to skip the notifier below */ |
3637 | state = INET6_IFADDR_STATE_DEAD; | |
3638 | ifa->state = 0; | |
3639 | if (!(ifa->flags & IFA_F_NODAD)) | |
3640 | ifa->flags |= IFA_F_TENTATIVE; | |
38bd10c4 DA |
3641 | |
3642 | rt = ifa->rt; | |
3643 | ifa->rt = NULL; | |
f1705ec1 DA |
3644 | } else { |
3645 | state = ifa->state; | |
3646 | ifa->state = INET6_IFADDR_STATE_DEAD; | |
3647 | ||
c882219a | 3648 | list_move(&ifa->if_list, &del_list); |
f1705ec1 DA |
3649 | } |
3650 | ||
8e8e676d | 3651 | spin_unlock_bh(&ifa->lock); |
9d82ca98 | 3652 | |
38bd10c4 DA |
3653 | if (rt) |
3654 | ip6_del_rt(rt); | |
3655 | ||
73a8bd74 DM |
3656 | if (state != INET6_IFADDR_STATE_DEAD) { |
3657 | __ipv6_ifa_notify(RTM_DELADDR, ifa); | |
f88c91dd | 3658 | inet6addr_notifier_call_chain(NETDEV_DOWN, ifa); |
ea06f717 MM |
3659 | } else { |
3660 | if (idev->cnf.forwarding) | |
3661 | addrconf_leave_anycast(ifa); | |
3662 | addrconf_leave_solict(ifa->idev, &ifa->addr); | |
27bdb2ab | 3663 | } |
8f37ada5 | 3664 | |
73a8bd74 DM |
3665 | write_lock_bh(&idev->lock); |
3666 | } | |
8f37ada5 | 3667 | |
1da177e4 LT |
3668 | write_unlock_bh(&idev->lock); |
3669 | ||
f1705ec1 DA |
3670 | /* now clean up addresses to be removed */ |
3671 | while (!list_empty(&del_list)) { | |
3672 | ifa = list_first_entry(&del_list, | |
3673 | struct inet6_ifaddr, if_list); | |
3674 | list_del(&ifa->if_list); | |
3675 | ||
3676 | in6_ifa_put(ifa); | |
3677 | } | |
3678 | ||
381f4dca SD |
3679 | /* Step 5: Discard anycast and multicast list */ |
3680 | if (how) { | |
3681 | ipv6_ac_destroy_dev(idev); | |
1da177e4 | 3682 | ipv6_mc_destroy_dev(idev); |
381f4dca | 3683 | } else { |
1da177e4 | 3684 | ipv6_mc_down(idev); |
381f4dca | 3685 | } |
1da177e4 | 3686 | |
1da177e4 | 3687 | idev->tstamp = jiffies; |
1ab1457c | 3688 | |
bcdd553f | 3689 | /* Last: Shot the device (if unregistered) */ |
439e2385 | 3690 | if (how) { |
408c4768 | 3691 | addrconf_sysctl_unregister(idev); |
1da177e4 LT |
3692 | neigh_parms_release(&nd_tbl, idev->nd_parms); |
3693 | neigh_ifdown(&nd_tbl, dev); | |
3694 | in6_dev_put(idev); | |
3695 | } | |
3696 | return 0; | |
3697 | } | |
3698 | ||
3699 | static void addrconf_rs_timer(unsigned long data) | |
3700 | { | |
b7b1bfce | 3701 | struct inet6_dev *idev = (struct inet6_dev *)data; |
caf92bc4 | 3702 | struct net_device *dev = idev->dev; |
b7b1bfce | 3703 | struct in6_addr lladdr; |
1da177e4 | 3704 | |
b7b1bfce | 3705 | write_lock(&idev->lock); |
5b2a1953 | 3706 | if (idev->dead || !(idev->if_flags & IF_READY)) |
1da177e4 LT |
3707 | goto out; |
3708 | ||
9ba2add3 | 3709 | if (!ipv6_accept_ra(idev)) |
5b2a1953 | 3710 | goto out; |
3711 | ||
3712 | /* Announcement received after solicitation was sent */ | |
3713 | if (idev->if_flags & IF_RA_RCVD) | |
1da177e4 | 3714 | goto out; |
1da177e4 | 3715 | |
bd11f074 | 3716 | if (idev->rs_probes++ < idev->cnf.rtr_solicits || idev->cnf.rtr_solicits < 0) { |
caf92bc4 CW |
3717 | write_unlock(&idev->lock); |
3718 | if (!ipv6_get_lladdr(dev, &lladdr, IFA_F_TENTATIVE)) | |
3719 | ndisc_send_rs(dev, &lladdr, | |
b7b1bfce HFS |
3720 | &in6addr_linklocal_allrouters); |
3721 | else | |
caf92bc4 | 3722 | goto put; |
1da177e4 | 3723 | |
caf92bc4 | 3724 | write_lock(&idev->lock); |
bd11f074 MŻ |
3725 | idev->rs_interval = rfc3315_s14_backoff_update( |
3726 | idev->rs_interval, idev->cnf.rtr_solicit_max_interval); | |
b7b1bfce HFS |
3727 | /* The wait after the last probe can be shorter */ |
3728 | addrconf_mod_rs_timer(idev, (idev->rs_probes == | |
3729 | idev->cnf.rtr_solicits) ? | |
3730 | idev->cnf.rtr_solicit_delay : | |
bd11f074 | 3731 | idev->rs_interval); |
1da177e4 | 3732 | } else { |
1da177e4 LT |
3733 | /* |
3734 | * Note: we do not support deprecated "all on-link" | |
3735 | * assumption any longer. | |
3736 | */ | |
91df42be | 3737 | pr_debug("%s: no IPv6 routers present\n", idev->dev->name); |
1da177e4 LT |
3738 | } |
3739 | ||
3740 | out: | |
b7b1bfce | 3741 | write_unlock(&idev->lock); |
caf92bc4 | 3742 | put: |
b7b1bfce | 3743 | in6_dev_put(idev); |
1da177e4 LT |
3744 | } |
3745 | ||
3746 | /* | |
3747 | * Duplicate Address Detection | |
3748 | */ | |
3c21edbd YH |
3749 | static void addrconf_dad_kick(struct inet6_ifaddr *ifp) |
3750 | { | |
3751 | unsigned long rand_num; | |
3752 | struct inet6_dev *idev = ifp->idev; | |
adc176c5 | 3753 | u64 nonce; |
3c21edbd | 3754 | |
95c385b4 NH |
3755 | if (ifp->flags & IFA_F_OPTIMISTIC) |
3756 | rand_num = 0; | |
3757 | else | |
63862b5b | 3758 | rand_num = prandom_u32() % (idev->cnf.rtr_solicit_delay ? : 1); |
95c385b4 | 3759 | |
adc176c5 EN |
3760 | nonce = 0; |
3761 | if (idev->cnf.enhanced_dad || | |
3762 | dev_net(idev->dev)->ipv6.devconf_all->enhanced_dad) { | |
3763 | do | |
3764 | get_random_bytes(&nonce, 6); | |
3765 | while (nonce == 0); | |
3766 | } | |
3767 | ifp->dad_nonce = nonce; | |
b7b1bfce | 3768 | ifp->dad_probes = idev->cnf.dad_transmits; |
c15b1cca | 3769 | addrconf_mod_dad_work(ifp, rand_num); |
3c21edbd YH |
3770 | } |
3771 | ||
c15b1cca | 3772 | static void addrconf_dad_begin(struct inet6_ifaddr *ifp) |
1da177e4 LT |
3773 | { |
3774 | struct inet6_dev *idev = ifp->idev; | |
3775 | struct net_device *dev = idev->dev; | |
764d3be6 | 3776 | bool bump_id, notify = false; |
1da177e4 LT |
3777 | |
3778 | addrconf_join_solict(dev, &ifp->addr); | |
3779 | ||
63862b5b | 3780 | prandom_seed((__force u32) ifp->addr.s6_addr32[3]); |
1da177e4 LT |
3781 | |
3782 | read_lock_bh(&idev->lock); | |
622ccdf1 | 3783 | spin_lock(&ifp->lock); |
e9d3e084 | 3784 | if (ifp->state == INET6_IFADDR_STATE_DEAD) |
1da177e4 | 3785 | goto out; |
1da177e4 LT |
3786 | |
3787 | if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || | |
1b34be74 | 3788 | idev->cnf.accept_dad < 1 || |
55ebaef1 NT |
3789 | !(ifp->flags&IFA_F_TENTATIVE) || |
3790 | ifp->flags & IFA_F_NODAD) { | |
764d3be6 | 3791 | bump_id = ifp->flags & IFA_F_TENTATIVE; |
cc411d0b | 3792 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
21809faf | 3793 | spin_unlock(&ifp->lock); |
1da177e4 LT |
3794 | read_unlock_bh(&idev->lock); |
3795 | ||
764d3be6 | 3796 | addrconf_dad_completed(ifp, bump_id); |
1da177e4 LT |
3797 | return; |
3798 | } | |
3799 | ||
6732bade | 3800 | if (!(idev->if_flags & IF_READY)) { |
21809faf | 3801 | spin_unlock(&ifp->lock); |
6732bade | 3802 | read_unlock_bh(&idev->lock); |
3c21edbd | 3803 | /* |
590a9887 | 3804 | * If the device is not ready: |
3c21edbd YH |
3805 | * - keep it tentative if it is a permanent address. |
3806 | * - otherwise, kill it. | |
3807 | */ | |
3808 | in6_ifa_hold(ifp); | |
cc411d0b | 3809 | addrconf_dad_stop(ifp, 0); |
6732bade | 3810 | return; |
3c21edbd | 3811 | } |
95c385b4 NH |
3812 | |
3813 | /* | |
3814 | * Optimistic nodes can start receiving | |
3815 | * Frames right away | |
3816 | */ | |
7fd2561e | 3817 | if (ifp->flags & IFA_F_OPTIMISTIC) { |
95c385b4 | 3818 | ip6_ins_rt(ifp->rt); |
7fd2561e EK |
3819 | if (ipv6_use_optimistic_addr(idev)) { |
3820 | /* Because optimistic nodes can use this address, | |
3821 | * notify listeners. If DAD fails, RTM_DELADDR is sent. | |
3822 | */ | |
16186a82 | 3823 | notify = true; |
7fd2561e EK |
3824 | } |
3825 | } | |
95c385b4 | 3826 | |
6732bade | 3827 | addrconf_dad_kick(ifp); |
1da177e4 | 3828 | out: |
622ccdf1 | 3829 | spin_unlock(&ifp->lock); |
1da177e4 | 3830 | read_unlock_bh(&idev->lock); |
16186a82 SAK |
3831 | if (notify) |
3832 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
1da177e4 LT |
3833 | } |
3834 | ||
c15b1cca | 3835 | static void addrconf_dad_start(struct inet6_ifaddr *ifp) |
1da177e4 | 3836 | { |
c15b1cca HFS |
3837 | bool begin_dad = false; |
3838 | ||
8e8e676d | 3839 | spin_lock_bh(&ifp->lock); |
c15b1cca HFS |
3840 | if (ifp->state != INET6_IFADDR_STATE_DEAD) { |
3841 | ifp->state = INET6_IFADDR_STATE_PREDAD; | |
3842 | begin_dad = true; | |
3843 | } | |
8e8e676d | 3844 | spin_unlock_bh(&ifp->lock); |
c15b1cca HFS |
3845 | |
3846 | if (begin_dad) | |
3847 | addrconf_mod_dad_work(ifp, 0); | |
3848 | } | |
3849 | ||
3850 | static void addrconf_dad_work(struct work_struct *w) | |
3851 | { | |
3852 | struct inet6_ifaddr *ifp = container_of(to_delayed_work(w), | |
3853 | struct inet6_ifaddr, | |
3854 | dad_work); | |
1da177e4 | 3855 | struct inet6_dev *idev = ifp->idev; |
764d3be6 | 3856 | bool bump_id, disable_ipv6 = false; |
1da177e4 LT |
3857 | struct in6_addr mcaddr; |
3858 | ||
c15b1cca HFS |
3859 | enum { |
3860 | DAD_PROCESS, | |
3861 | DAD_BEGIN, | |
3862 | DAD_ABORT, | |
3863 | } action = DAD_PROCESS; | |
3864 | ||
3865 | rtnl_lock(); | |
3866 | ||
8e8e676d | 3867 | spin_lock_bh(&ifp->lock); |
c15b1cca HFS |
3868 | if (ifp->state == INET6_IFADDR_STATE_PREDAD) { |
3869 | action = DAD_BEGIN; | |
3870 | ifp->state = INET6_IFADDR_STATE_DAD; | |
3871 | } else if (ifp->state == INET6_IFADDR_STATE_ERRDAD) { | |
3872 | action = DAD_ABORT; | |
3873 | ifp->state = INET6_IFADDR_STATE_POSTDAD; | |
85b51b12 MM |
3874 | |
3875 | if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6 && | |
3876 | !(ifp->flags & IFA_F_STABLE_PRIVACY)) { | |
3877 | struct in6_addr addr; | |
3878 | ||
3879 | addr.s6_addr32[0] = htonl(0xfe800000); | |
3880 | addr.s6_addr32[1] = 0; | |
3881 | ||
3882 | if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) && | |
3883 | ipv6_addr_equal(&ifp->addr, &addr)) { | |
3884 | /* DAD failed for link-local based on MAC */ | |
3885 | idev->cnf.disable_ipv6 = 1; | |
3886 | ||
3887 | pr_info("%s: IPv6 being disabled!\n", | |
3888 | ifp->idev->dev->name); | |
3889 | disable_ipv6 = true; | |
3890 | } | |
3891 | } | |
c15b1cca | 3892 | } |
8e8e676d | 3893 | spin_unlock_bh(&ifp->lock); |
c15b1cca HFS |
3894 | |
3895 | if (action == DAD_BEGIN) { | |
3896 | addrconf_dad_begin(ifp); | |
3897 | goto out; | |
3898 | } else if (action == DAD_ABORT) { | |
751eb6b6 | 3899 | in6_ifa_hold(ifp); |
c15b1cca | 3900 | addrconf_dad_stop(ifp, 1); |
85b51b12 MM |
3901 | if (disable_ipv6) |
3902 | addrconf_ifdown(idev->dev, 0); | |
c15b1cca HFS |
3903 | goto out; |
3904 | } | |
3905 | ||
b7b1bfce | 3906 | if (!ifp->dad_probes && addrconf_dad_end(ifp)) |
f2344a13 HX |
3907 | goto out; |
3908 | ||
c15b1cca | 3909 | write_lock_bh(&idev->lock); |
122e4519 | 3910 | if (idev->dead || !(idev->if_flags & IF_READY)) { |
c15b1cca | 3911 | write_unlock_bh(&idev->lock); |
1da177e4 LT |
3912 | goto out; |
3913 | } | |
21809faf | 3914 | |
3915 | spin_lock(&ifp->lock); | |
622ccdf1 HX |
3916 | if (ifp->state == INET6_IFADDR_STATE_DEAD) { |
3917 | spin_unlock(&ifp->lock); | |
c15b1cca | 3918 | write_unlock_bh(&idev->lock); |
622ccdf1 HX |
3919 | goto out; |
3920 | } | |
3921 | ||
b7b1bfce | 3922 | if (ifp->dad_probes == 0) { |
1da177e4 LT |
3923 | /* |
3924 | * DAD was successful | |
3925 | */ | |
3926 | ||
764d3be6 | 3927 | bump_id = ifp->flags & IFA_F_TENTATIVE; |
cc411d0b | 3928 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
21809faf | 3929 | spin_unlock(&ifp->lock); |
c15b1cca | 3930 | write_unlock_bh(&idev->lock); |
1da177e4 | 3931 | |
764d3be6 | 3932 | addrconf_dad_completed(ifp, bump_id); |
1da177e4 LT |
3933 | |
3934 | goto out; | |
3935 | } | |
3936 | ||
b7b1bfce | 3937 | ifp->dad_probes--; |
c15b1cca HFS |
3938 | addrconf_mod_dad_work(ifp, |
3939 | NEIGH_VAR(ifp->idev->nd_parms, RETRANS_TIME)); | |
21809faf | 3940 | spin_unlock(&ifp->lock); |
c15b1cca | 3941 | write_unlock_bh(&idev->lock); |
1da177e4 LT |
3942 | |
3943 | /* send a neighbour solicitation for our addr */ | |
1da177e4 | 3944 | addrconf_addr_solict_mult(&ifp->addr, &mcaddr); |
adc176c5 EN |
3945 | ndisc_send_ns(ifp->idev->dev, &ifp->addr, &mcaddr, &in6addr_any, |
3946 | ifp->dad_nonce); | |
1da177e4 LT |
3947 | out: |
3948 | in6_ifa_put(ifp); | |
c15b1cca | 3949 | rtnl_unlock(); |
1da177e4 LT |
3950 | } |
3951 | ||
11ffff75 HFS |
3952 | /* ifp->idev must be at least read locked */ |
3953 | static bool ipv6_lonely_lladdr(struct inet6_ifaddr *ifp) | |
3954 | { | |
3955 | struct inet6_ifaddr *ifpiter; | |
3956 | struct inet6_dev *idev = ifp->idev; | |
3957 | ||
602582ca HFS |
3958 | list_for_each_entry_reverse(ifpiter, &idev->addr_list, if_list) { |
3959 | if (ifpiter->scope > IFA_LINK) | |
3960 | break; | |
11ffff75 HFS |
3961 | if (ifp != ifpiter && ifpiter->scope == IFA_LINK && |
3962 | (ifpiter->flags & (IFA_F_PERMANENT|IFA_F_TENTATIVE| | |
3963 | IFA_F_OPTIMISTIC|IFA_F_DADFAILED)) == | |
3964 | IFA_F_PERMANENT) | |
3965 | return false; | |
3966 | } | |
3967 | return true; | |
3968 | } | |
3969 | ||
764d3be6 | 3970 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp, bool bump_id) |
1da177e4 | 3971 | { |
e21e8467 | 3972 | struct net_device *dev = ifp->idev->dev; |
b7b1bfce | 3973 | struct in6_addr lladdr; |
b173ee48 | 3974 | bool send_rs, send_mld; |
b7b1bfce | 3975 | |
c15b1cca | 3976 | addrconf_del_dad_work(ifp); |
1da177e4 LT |
3977 | |
3978 | /* | |
3979 | * Configure the address for reception. Now it is valid. | |
3980 | */ | |
3981 | ||
3982 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
3983 | ||
026359bc TA |
3984 | /* If added prefix is link local and we are prepared to process |
3985 | router advertisements, start sending router solicitations. | |
1da177e4 LT |
3986 | */ |
3987 | ||
1ec047eb | 3988 | read_lock_bh(&ifp->idev->lock); |
11ffff75 | 3989 | send_mld = ifp->scope == IFA_LINK && ipv6_lonely_lladdr(ifp); |
b173ee48 HFS |
3990 | send_rs = send_mld && |
3991 | ipv6_accept_ra(ifp->idev) && | |
bd11f074 | 3992 | ifp->idev->cnf.rtr_solicits != 0 && |
b173ee48 | 3993 | (dev->flags&IFF_LOOPBACK) == 0; |
1ec047eb HFS |
3994 | read_unlock_bh(&ifp->idev->lock); |
3995 | ||
b173ee48 HFS |
3996 | /* While dad is in progress mld report's source address is in6_addrany. |
3997 | * Resend with proper ll now. | |
3998 | */ | |
3999 | if (send_mld) | |
4000 | ipv6_mc_dad_complete(ifp->idev); | |
4001 | ||
1ec047eb | 4002 | if (send_rs) { |
1da177e4 LT |
4003 | /* |
4004 | * If a host as already performed a random delay | |
4005 | * [...] as part of DAD [...] there is no need | |
4006 | * to delay again before sending the first RS | |
4007 | */ | |
1ec047eb | 4008 | if (ipv6_get_lladdr(dev, &lladdr, IFA_F_TENTATIVE)) |
b7b1bfce | 4009 | return; |
1ec047eb | 4010 | ndisc_send_rs(dev, &lladdr, &in6addr_linklocal_allrouters); |
1da177e4 | 4011 | |
b7b1bfce HFS |
4012 | write_lock_bh(&ifp->idev->lock); |
4013 | spin_lock(&ifp->lock); | |
bd11f074 MŻ |
4014 | ifp->idev->rs_interval = rfc3315_s14_backoff_init( |
4015 | ifp->idev->cnf.rtr_solicit_interval); | |
b7b1bfce | 4016 | ifp->idev->rs_probes = 1; |
1da177e4 | 4017 | ifp->idev->if_flags |= IF_RS_SENT; |
bd11f074 | 4018 | addrconf_mod_rs_timer(ifp->idev, ifp->idev->rs_interval); |
b7b1bfce HFS |
4019 | spin_unlock(&ifp->lock); |
4020 | write_unlock_bh(&ifp->idev->lock); | |
1da177e4 | 4021 | } |
764d3be6 PA |
4022 | |
4023 | if (bump_id) | |
4024 | rt_genid_bump_ipv6(dev_net(dev)); | |
a11a7f71 MH |
4025 | |
4026 | /* Make sure that a new temporary address will be created | |
4027 | * before this temporary address becomes deprecated. | |
4028 | */ | |
4029 | if (ifp->flags & IFA_F_TEMPORARY) | |
4030 | addrconf_verify_rtnl(); | |
1da177e4 LT |
4031 | } |
4032 | ||
e21e8467 SH |
4033 | static void addrconf_dad_run(struct inet6_dev *idev) |
4034 | { | |
c5e33bdd YH |
4035 | struct inet6_ifaddr *ifp; |
4036 | ||
4037 | read_lock_bh(&idev->lock); | |
502a2ffd | 4038 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
21809faf | 4039 | spin_lock(&ifp->lock); |
f2344a13 HX |
4040 | if (ifp->flags & IFA_F_TENTATIVE && |
4041 | ifp->state == INET6_IFADDR_STATE_DAD) | |
4042 | addrconf_dad_kick(ifp); | |
21809faf | 4043 | spin_unlock(&ifp->lock); |
c5e33bdd YH |
4044 | } |
4045 | read_unlock_bh(&idev->lock); | |
4046 | } | |
4047 | ||
1da177e4 LT |
4048 | #ifdef CONFIG_PROC_FS |
4049 | struct if6_iter_state { | |
3c40090a | 4050 | struct seq_net_private p; |
1da177e4 | 4051 | int bucket; |
1d578303 | 4052 | int offset; |
1da177e4 LT |
4053 | }; |
4054 | ||
1d578303 | 4055 | static struct inet6_ifaddr *if6_get_first(struct seq_file *seq, loff_t pos) |
1da177e4 LT |
4056 | { |
4057 | struct inet6_ifaddr *ifa = NULL; | |
4058 | struct if6_iter_state *state = seq->private; | |
1218854a | 4059 | struct net *net = seq_file_net(seq); |
1d578303 | 4060 | int p = 0; |
1da177e4 | 4061 | |
1d578303 MM |
4062 | /* initial bucket if pos is 0 */ |
4063 | if (pos == 0) { | |
4064 | state->bucket = 0; | |
4065 | state->offset = 0; | |
4066 | } | |
4067 | ||
4068 | for (; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { | |
b67bfe0d | 4069 | hlist_for_each_entry_rcu_bh(ifa, &inet6_addr_lst[state->bucket], |
1d578303 | 4070 | addr_lst) { |
9f0d3c27 ED |
4071 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
4072 | continue; | |
1d578303 MM |
4073 | /* sync with offset */ |
4074 | if (p < state->offset) { | |
4075 | p++; | |
4076 | continue; | |
4077 | } | |
4078 | state->offset++; | |
9f0d3c27 | 4079 | return ifa; |
1d578303 MM |
4080 | } |
4081 | ||
4082 | /* prepare for next bucket */ | |
4083 | state->offset = 0; | |
4084 | p = 0; | |
1da177e4 | 4085 | } |
c2e21293 | 4086 | return NULL; |
1da177e4 LT |
4087 | } |
4088 | ||
c2e21293 | 4089 | static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, |
4090 | struct inet6_ifaddr *ifa) | |
1da177e4 LT |
4091 | { |
4092 | struct if6_iter_state *state = seq->private; | |
1218854a | 4093 | struct net *net = seq_file_net(seq); |
1da177e4 | 4094 | |
b67bfe0d | 4095 | hlist_for_each_entry_continue_rcu_bh(ifa, addr_lst) { |
9f0d3c27 ED |
4096 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
4097 | continue; | |
1d578303 | 4098 | state->offset++; |
9f0d3c27 | 4099 | return ifa; |
1d578303 | 4100 | } |
3c40090a | 4101 | |
c2e21293 | 4102 | while (++state->bucket < IN6_ADDR_HSIZE) { |
1d578303 | 4103 | state->offset = 0; |
b67bfe0d | 4104 | hlist_for_each_entry_rcu_bh(ifa, |
c2e21293 | 4105 | &inet6_addr_lst[state->bucket], addr_lst) { |
9f0d3c27 ED |
4106 | if (!net_eq(dev_net(ifa->idev->dev), net)) |
4107 | continue; | |
1d578303 | 4108 | state->offset++; |
9f0d3c27 | 4109 | return ifa; |
c2e21293 | 4110 | } |
1da177e4 | 4111 | } |
3c40090a | 4112 | |
c2e21293 | 4113 | return NULL; |
1da177e4 LT |
4114 | } |
4115 | ||
1da177e4 | 4116 | static void *if6_seq_start(struct seq_file *seq, loff_t *pos) |
4f70ecca | 4117 | __acquires(rcu_bh) |
1da177e4 | 4118 | { |
5c578aed | 4119 | rcu_read_lock_bh(); |
1d578303 | 4120 | return if6_get_first(seq, *pos); |
1da177e4 LT |
4121 | } |
4122 | ||
4123 | static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
4124 | { | |
4125 | struct inet6_ifaddr *ifa; | |
4126 | ||
4127 | ifa = if6_get_next(seq, v); | |
4128 | ++*pos; | |
4129 | return ifa; | |
4130 | } | |
4131 | ||
4132 | static void if6_seq_stop(struct seq_file *seq, void *v) | |
4f70ecca | 4133 | __releases(rcu_bh) |
1da177e4 | 4134 | { |
5c578aed | 4135 | rcu_read_unlock_bh(); |
1da177e4 LT |
4136 | } |
4137 | ||
4138 | static int if6_seq_show(struct seq_file *seq, void *v) | |
4139 | { | |
4140 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; | |
971a351c | 4141 | seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n", |
b071195d | 4142 | &ifp->addr, |
1da177e4 LT |
4143 | ifp->idev->dev->ifindex, |
4144 | ifp->prefix_len, | |
4145 | ifp->scope, | |
971a351c | 4146 | (u8) ifp->flags, |
1da177e4 LT |
4147 | ifp->idev->dev->name); |
4148 | return 0; | |
4149 | } | |
4150 | ||
56b3d975 | 4151 | static const struct seq_operations if6_seq_ops = { |
1da177e4 LT |
4152 | .start = if6_seq_start, |
4153 | .next = if6_seq_next, | |
4154 | .show = if6_seq_show, | |
4155 | .stop = if6_seq_stop, | |
4156 | }; | |
4157 | ||
4158 | static int if6_seq_open(struct inode *inode, struct file *file) | |
4159 | { | |
3c40090a DL |
4160 | return seq_open_net(inode, file, &if6_seq_ops, |
4161 | sizeof(struct if6_iter_state)); | |
1da177e4 LT |
4162 | } |
4163 | ||
9a32144e | 4164 | static const struct file_operations if6_fops = { |
1da177e4 LT |
4165 | .owner = THIS_MODULE, |
4166 | .open = if6_seq_open, | |
4167 | .read = seq_read, | |
4168 | .llseek = seq_lseek, | |
3c40090a | 4169 | .release = seq_release_net, |
1da177e4 LT |
4170 | }; |
4171 | ||
2c8c1e72 | 4172 | static int __net_init if6_proc_net_init(struct net *net) |
1da177e4 | 4173 | { |
d4beaa66 | 4174 | if (!proc_create("if_inet6", S_IRUGO, net->proc_net, &if6_fops)) |
1da177e4 LT |
4175 | return -ENOMEM; |
4176 | return 0; | |
4177 | } | |
4178 | ||
2c8c1e72 | 4179 | static void __net_exit if6_proc_net_exit(struct net *net) |
3c40090a | 4180 | { |
ece31ffd | 4181 | remove_proc_entry("if_inet6", net->proc_net); |
3c40090a DL |
4182 | } |
4183 | ||
4184 | static struct pernet_operations if6_proc_net_ops = { | |
67ba4152 IM |
4185 | .init = if6_proc_net_init, |
4186 | .exit = if6_proc_net_exit, | |
3c40090a DL |
4187 | }; |
4188 | ||
4189 | int __init if6_proc_init(void) | |
4190 | { | |
4191 | return register_pernet_subsys(&if6_proc_net_ops); | |
4192 | } | |
4193 | ||
1da177e4 LT |
4194 | void if6_proc_exit(void) |
4195 | { | |
3c40090a | 4196 | unregister_pernet_subsys(&if6_proc_net_ops); |
1da177e4 LT |
4197 | } |
4198 | #endif /* CONFIG_PROC_FS */ | |
4199 | ||
07a93626 | 4200 | #if IS_ENABLED(CONFIG_IPV6_MIP6) |
3b9f9a1c | 4201 | /* Check if address is a home address configured on any interface. */ |
b71d1d42 | 4202 | int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr) |
3b9f9a1c NT |
4203 | { |
4204 | int ret = 0; | |
c2e21293 | 4205 | struct inet6_ifaddr *ifp = NULL; |
ddbe5032 | 4206 | unsigned int hash = inet6_addr_hash(addr); |
c2e21293 | 4207 | |
5c578aed | 4208 | rcu_read_lock_bh(); |
b67bfe0d | 4209 | hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[hash], addr_lst) { |
878628fb | 4210 | if (!net_eq(dev_net(ifp->idev->dev), net)) |
389f6612 | 4211 | continue; |
caad295f | 4212 | if (ipv6_addr_equal(&ifp->addr, addr) && |
3b9f9a1c NT |
4213 | (ifp->flags & IFA_F_HOMEADDRESS)) { |
4214 | ret = 1; | |
4215 | break; | |
4216 | } | |
4217 | } | |
5c578aed | 4218 | rcu_read_unlock_bh(); |
3b9f9a1c NT |
4219 | return ret; |
4220 | } | |
4221 | #endif | |
4222 | ||
1da177e4 LT |
4223 | /* |
4224 | * Periodic address status verification | |
4225 | */ | |
4226 | ||
c15b1cca | 4227 | static void addrconf_verify_rtnl(void) |
1da177e4 | 4228 | { |
b2db7564 | 4229 | unsigned long now, next, next_sec, next_sched; |
1da177e4 | 4230 | struct inet6_ifaddr *ifp; |
1da177e4 LT |
4231 | int i; |
4232 | ||
c15b1cca HFS |
4233 | ASSERT_RTNL(); |
4234 | ||
5c578aed | 4235 | rcu_read_lock_bh(); |
1da177e4 | 4236 | now = jiffies; |
b2db7564 | 4237 | next = round_jiffies_up(now + ADDR_CHECK_FREQUENCY); |
1da177e4 | 4238 | |
c15b1cca | 4239 | cancel_delayed_work(&addr_chk_work); |
1da177e4 | 4240 | |
bcdd553f | 4241 | for (i = 0; i < IN6_ADDR_HSIZE; i++) { |
1da177e4 | 4242 | restart: |
c15b1cca | 4243 | hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[i], addr_lst) { |
1da177e4 | 4244 | unsigned long age; |
1da177e4 | 4245 | |
fad8da3e YA |
4246 | /* When setting preferred_lft to a value not zero or |
4247 | * infinity, while valid_lft is infinity | |
4248 | * IFA_F_PERMANENT has a non-infinity life time. | |
4249 | */ | |
4250 | if ((ifp->flags & IFA_F_PERMANENT) && | |
4251 | (ifp->prefered_lft == INFINITY_LIFE_TIME)) | |
1da177e4 LT |
4252 | continue; |
4253 | ||
4254 | spin_lock(&ifp->lock); | |
b2db7564 YH |
4255 | /* We try to batch several events at once. */ |
4256 | age = (now - ifp->tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ; | |
1da177e4 | 4257 | |
8f27ebb9 YH |
4258 | if (ifp->valid_lft != INFINITY_LIFE_TIME && |
4259 | age >= ifp->valid_lft) { | |
1da177e4 LT |
4260 | spin_unlock(&ifp->lock); |
4261 | in6_ifa_hold(ifp); | |
1da177e4 LT |
4262 | ipv6_del_addr(ifp); |
4263 | goto restart; | |
8f27ebb9 YH |
4264 | } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { |
4265 | spin_unlock(&ifp->lock); | |
4266 | continue; | |
1da177e4 | 4267 | } else if (age >= ifp->prefered_lft) { |
a1ed0526 | 4268 | /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */ |
1da177e4 LT |
4269 | int deprecate = 0; |
4270 | ||
4271 | if (!(ifp->flags&IFA_F_DEPRECATED)) { | |
4272 | deprecate = 1; | |
4273 | ifp->flags |= IFA_F_DEPRECATED; | |
4274 | } | |
4275 | ||
fad8da3e YA |
4276 | if ((ifp->valid_lft != INFINITY_LIFE_TIME) && |
4277 | (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))) | |
1da177e4 LT |
4278 | next = ifp->tstamp + ifp->valid_lft * HZ; |
4279 | ||
4280 | spin_unlock(&ifp->lock); | |
4281 | ||
4282 | if (deprecate) { | |
4283 | in6_ifa_hold(ifp); | |
1da177e4 LT |
4284 | |
4285 | ipv6_ifa_notify(0, ifp); | |
4286 | in6_ifa_put(ifp); | |
4287 | goto restart; | |
4288 | } | |
1da177e4 LT |
4289 | } else if ((ifp->flags&IFA_F_TEMPORARY) && |
4290 | !(ifp->flags&IFA_F_TENTATIVE)) { | |
88949cf4 | 4291 | unsigned long regen_advance = ifp->idev->cnf.regen_max_retry * |
4292 | ifp->idev->cnf.dad_transmits * | |
1f9248e5 | 4293 | NEIGH_VAR(ifp->idev->nd_parms, RETRANS_TIME) / HZ; |
88949cf4 | 4294 | |
1da177e4 LT |
4295 | if (age >= ifp->prefered_lft - regen_advance) { |
4296 | struct inet6_ifaddr *ifpub = ifp->ifpub; | |
4297 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
4298 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
4299 | if (!ifp->regen_count && ifpub) { | |
4300 | ifp->regen_count++; | |
4301 | in6_ifa_hold(ifp); | |
4302 | in6_ifa_hold(ifpub); | |
4303 | spin_unlock(&ifp->lock); | |
5c578aed | 4304 | |
291d809b HY |
4305 | spin_lock(&ifpub->lock); |
4306 | ifpub->regen_count = 0; | |
4307 | spin_unlock(&ifpub->lock); | |
1da177e4 LT |
4308 | ipv6_create_tempaddr(ifpub, ifp); |
4309 | in6_ifa_put(ifpub); | |
4310 | in6_ifa_put(ifp); | |
4311 | goto restart; | |
4312 | } | |
4313 | } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) | |
4314 | next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; | |
4315 | spin_unlock(&ifp->lock); | |
1da177e4 LT |
4316 | } else { |
4317 | /* ifp->prefered_lft <= ifp->valid_lft */ | |
4318 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
4319 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
4320 | spin_unlock(&ifp->lock); | |
4321 | } | |
4322 | } | |
1da177e4 LT |
4323 | } |
4324 | ||
b2db7564 YH |
4325 | next_sec = round_jiffies_up(next); |
4326 | next_sched = next; | |
4327 | ||
4328 | /* If rounded timeout is accurate enough, accept it. */ | |
4329 | if (time_before(next_sec, next + ADDRCONF_TIMER_FUZZ)) | |
4330 | next_sched = next_sec; | |
4331 | ||
4332 | /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */ | |
4333 | if (time_before(next_sched, jiffies + ADDRCONF_TIMER_FUZZ_MAX)) | |
4334 | next_sched = jiffies + ADDRCONF_TIMER_FUZZ_MAX; | |
4335 | ||
ba3542e1 | 4336 | ADBG(KERN_DEBUG "now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n", |
4337 | now, next, next_sec, next_sched); | |
c15b1cca | 4338 | mod_delayed_work(addrconf_wq, &addr_chk_work, next_sched - now); |
5c578aed | 4339 | rcu_read_unlock_bh(); |
1da177e4 LT |
4340 | } |
4341 | ||
c15b1cca HFS |
4342 | static void addrconf_verify_work(struct work_struct *w) |
4343 | { | |
4344 | rtnl_lock(); | |
4345 | addrconf_verify_rtnl(); | |
4346 | rtnl_unlock(); | |
4347 | } | |
4348 | ||
4349 | static void addrconf_verify(void) | |
4350 | { | |
4351 | mod_delayed_work(addrconf_wq, &addr_chk_work, 0); | |
4352 | } | |
4353 | ||
caeaba79 ND |
4354 | static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local, |
4355 | struct in6_addr **peer_pfx) | |
461d8837 TG |
4356 | { |
4357 | struct in6_addr *pfx = NULL; | |
4358 | ||
caeaba79 ND |
4359 | *peer_pfx = NULL; |
4360 | ||
461d8837 TG |
4361 | if (addr) |
4362 | pfx = nla_data(addr); | |
4363 | ||
4364 | if (local) { | |
4365 | if (pfx && nla_memcmp(local, pfx, sizeof(*pfx))) | |
caeaba79 ND |
4366 | *peer_pfx = pfx; |
4367 | pfx = nla_data(local); | |
461d8837 TG |
4368 | } |
4369 | ||
4370 | return pfx; | |
4371 | } | |
4372 | ||
ef7c79ed | 4373 | static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = { |
461d8837 TG |
4374 | [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, |
4375 | [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, | |
4376 | [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, | |
479840ff | 4377 | [IFA_FLAGS] = { .len = sizeof(u32) }, |
461d8837 TG |
4378 | }; |
4379 | ||
1da177e4 | 4380 | static int |
661d2967 | 4381 | inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 4382 | { |
3b1e0a65 | 4383 | struct net *net = sock_net(skb->sk); |
b933f716 TG |
4384 | struct ifaddrmsg *ifm; |
4385 | struct nlattr *tb[IFA_MAX+1]; | |
caeaba79 | 4386 | struct in6_addr *pfx, *peer_pfx; |
6046d5b4 | 4387 | u32 ifa_flags; |
b933f716 | 4388 | int err; |
1da177e4 | 4389 | |
b933f716 TG |
4390 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
4391 | if (err < 0) | |
4392 | return err; | |
4393 | ||
4394 | ifm = nlmsg_data(nlh); | |
caeaba79 | 4395 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer_pfx); |
63159f29 | 4396 | if (!pfx) |
1da177e4 LT |
4397 | return -EINVAL; |
4398 | ||
6046d5b4 HK |
4399 | ifa_flags = tb[IFA_FLAGS] ? nla_get_u32(tb[IFA_FLAGS]) : ifm->ifa_flags; |
4400 | ||
4401 | /* We ignore other flags so far. */ | |
4402 | ifa_flags &= IFA_F_MANAGETEMPADDR; | |
4403 | ||
4404 | return inet6_addr_del(net, ifm->ifa_index, ifa_flags, pfx, | |
4405 | ifm->ifa_prefixlen); | |
1da177e4 LT |
4406 | } |
4407 | ||
479840ff | 4408 | static int inet6_addr_modify(struct inet6_ifaddr *ifp, u32 ifa_flags, |
55ebaef1 | 4409 | u32 prefered_lft, u32 valid_lft) |
081bba5b | 4410 | { |
6f704992 YH |
4411 | u32 flags; |
4412 | clock_t expires; | |
4bed72e4 | 4413 | unsigned long timeout; |
53bd6749 | 4414 | bool was_managetempaddr; |
5b84efec | 4415 | bool had_prefixroute; |
46d48046 | 4416 | |
c15b1cca HFS |
4417 | ASSERT_RTNL(); |
4418 | ||
081bba5b NT |
4419 | if (!valid_lft || (prefered_lft > valid_lft)) |
4420 | return -EINVAL; | |
4421 | ||
53bd6749 JP |
4422 | if (ifa_flags & IFA_F_MANAGETEMPADDR && |
4423 | (ifp->flags & IFA_F_TEMPORARY || ifp->prefix_len != 64)) | |
4424 | return -EINVAL; | |
4425 | ||
4bed72e4 YH |
4426 | timeout = addrconf_timeout_fixup(valid_lft, HZ); |
4427 | if (addrconf_finite_timeout(timeout)) { | |
4428 | expires = jiffies_to_clock_t(timeout * HZ); | |
4429 | valid_lft = timeout; | |
6f704992 | 4430 | flags = RTF_EXPIRES; |
4bed72e4 YH |
4431 | } else { |
4432 | expires = 0; | |
4433 | flags = 0; | |
4434 | ifa_flags |= IFA_F_PERMANENT; | |
6f704992 | 4435 | } |
081bba5b | 4436 | |
4bed72e4 YH |
4437 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); |
4438 | if (addrconf_finite_timeout(timeout)) { | |
4439 | if (timeout == 0) | |
4440 | ifa_flags |= IFA_F_DEPRECATED; | |
4441 | prefered_lft = timeout; | |
4442 | } | |
081bba5b NT |
4443 | |
4444 | spin_lock_bh(&ifp->lock); | |
53bd6749 | 4445 | was_managetempaddr = ifp->flags & IFA_F_MANAGETEMPADDR; |
5b84efec TH |
4446 | had_prefixroute = ifp->flags & IFA_F_PERMANENT && |
4447 | !(ifp->flags & IFA_F_NOPREFIXROUTE); | |
53bd6749 | 4448 | ifp->flags &= ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | |
761aac73 TH |
4449 | IFA_F_HOMEADDRESS | IFA_F_MANAGETEMPADDR | |
4450 | IFA_F_NOPREFIXROUTE); | |
53bd6749 | 4451 | ifp->flags |= ifa_flags; |
081bba5b NT |
4452 | ifp->tstamp = jiffies; |
4453 | ifp->valid_lft = valid_lft; | |
4454 | ifp->prefered_lft = prefered_lft; | |
4455 | ||
4456 | spin_unlock_bh(&ifp->lock); | |
4457 | if (!(ifp->flags&IFA_F_TENTATIVE)) | |
4458 | ipv6_ifa_notify(0, ifp); | |
081bba5b | 4459 | |
761aac73 TH |
4460 | if (!(ifa_flags & IFA_F_NOPREFIXROUTE)) { |
4461 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev, | |
4462 | expires, flags); | |
5b84efec TH |
4463 | } else if (had_prefixroute) { |
4464 | enum cleanup_prefix_rt_t action; | |
4465 | unsigned long rt_expires; | |
4466 | ||
4467 | write_lock_bh(&ifp->idev->lock); | |
4468 | action = check_cleanup_prefix_route(ifp, &rt_expires); | |
4469 | write_unlock_bh(&ifp->idev->lock); | |
4470 | ||
4471 | if (action != CLEANUP_PREFIX_RT_NOP) { | |
4472 | cleanup_prefix_route(ifp, rt_expires, | |
4473 | action == CLEANUP_PREFIX_RT_DEL); | |
4474 | } | |
761aac73 | 4475 | } |
53bd6749 JP |
4476 | |
4477 | if (was_managetempaddr || ifp->flags & IFA_F_MANAGETEMPADDR) { | |
4478 | if (was_managetempaddr && !(ifp->flags & IFA_F_MANAGETEMPADDR)) | |
4479 | valid_lft = prefered_lft = 0; | |
4480 | manage_tempaddrs(ifp->idev, ifp, valid_lft, prefered_lft, | |
4481 | !was_managetempaddr, jiffies); | |
4482 | } | |
4483 | ||
c15b1cca | 4484 | addrconf_verify_rtnl(); |
081bba5b NT |
4485 | |
4486 | return 0; | |
4487 | } | |
4488 | ||
1da177e4 | 4489 | static int |
661d2967 | 4490 | inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 4491 | { |
3b1e0a65 | 4492 | struct net *net = sock_net(skb->sk); |
461d8837 TG |
4493 | struct ifaddrmsg *ifm; |
4494 | struct nlattr *tb[IFA_MAX+1]; | |
caeaba79 | 4495 | struct in6_addr *pfx, *peer_pfx; |
7198f8ce TG |
4496 | struct inet6_ifaddr *ifa; |
4497 | struct net_device *dev; | |
55ebaef1 | 4498 | u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; |
479840ff | 4499 | u32 ifa_flags; |
461d8837 | 4500 | int err; |
1da177e4 | 4501 | |
461d8837 TG |
4502 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
4503 | if (err < 0) | |
4504 | return err; | |
4505 | ||
4506 | ifm = nlmsg_data(nlh); | |
caeaba79 | 4507 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer_pfx); |
63159f29 | 4508 | if (!pfx) |
1da177e4 LT |
4509 | return -EINVAL; |
4510 | ||
461d8837 | 4511 | if (tb[IFA_CACHEINFO]) { |
0778769d | 4512 | struct ifa_cacheinfo *ci; |
461d8837 TG |
4513 | |
4514 | ci = nla_data(tb[IFA_CACHEINFO]); | |
0778769d | 4515 | valid_lft = ci->ifa_valid; |
461d8837 TG |
4516 | preferred_lft = ci->ifa_prefered; |
4517 | } else { | |
4518 | preferred_lft = INFINITY_LIFE_TIME; | |
4519 | valid_lft = INFINITY_LIFE_TIME; | |
0778769d NT |
4520 | } |
4521 | ||
af284937 | 4522 | dev = __dev_get_by_index(net, ifm->ifa_index); |
63159f29 | 4523 | if (!dev) |
7198f8ce TG |
4524 | return -ENODEV; |
4525 | ||
479840ff JP |
4526 | ifa_flags = tb[IFA_FLAGS] ? nla_get_u32(tb[IFA_FLAGS]) : ifm->ifa_flags; |
4527 | ||
55ebaef1 | 4528 | /* We ignore other flags so far. */ |
761aac73 | 4529 | ifa_flags &= IFA_F_NODAD | IFA_F_HOMEADDRESS | IFA_F_MANAGETEMPADDR | |
93a714d6 | 4530 | IFA_F_NOPREFIXROUTE | IFA_F_MCAUTOJOIN; |
55ebaef1 | 4531 | |
1cab3da6 | 4532 | ifa = ipv6_get_ifaddr(net, pfx, dev, 1); |
63159f29 | 4533 | if (!ifa) { |
7198f8ce TG |
4534 | /* |
4535 | * It would be best to check for !NLM_F_CREATE here but | |
db9c7c39 | 4536 | * userspace already relies on not having to provide this. |
7198f8ce | 4537 | */ |
caeaba79 | 4538 | return inet6_addr_add(net, ifm->ifa_index, pfx, peer_pfx, |
af284937 DL |
4539 | ifm->ifa_prefixlen, ifa_flags, |
4540 | preferred_lft, valid_lft); | |
081bba5b NT |
4541 | } |
4542 | ||
7198f8ce TG |
4543 | if (nlh->nlmsg_flags & NLM_F_EXCL || |
4544 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) | |
4545 | err = -EEXIST; | |
4546 | else | |
55ebaef1 | 4547 | err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft); |
7198f8ce TG |
4548 | |
4549 | in6_ifa_put(ifa); | |
4550 | ||
4551 | return err; | |
1da177e4 LT |
4552 | } |
4553 | ||
479840ff | 4554 | static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u32 flags, |
101bb229 TG |
4555 | u8 scope, int ifindex) |
4556 | { | |
4557 | struct ifaddrmsg *ifm; | |
4558 | ||
4559 | ifm = nlmsg_data(nlh); | |
4560 | ifm->ifa_family = AF_INET6; | |
4561 | ifm->ifa_prefixlen = prefixlen; | |
4562 | ifm->ifa_flags = flags; | |
4563 | ifm->ifa_scope = scope; | |
4564 | ifm->ifa_index = ifindex; | |
4565 | } | |
4566 | ||
85486af0 TG |
4567 | static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, |
4568 | unsigned long tstamp, u32 preferred, u32 valid) | |
4569 | { | |
4570 | struct ifa_cacheinfo ci; | |
4571 | ||
18a31e1e TG |
4572 | ci.cstamp = cstamp_delta(cstamp); |
4573 | ci.tstamp = cstamp_delta(tstamp); | |
85486af0 TG |
4574 | ci.ifa_prefered = preferred; |
4575 | ci.ifa_valid = valid; | |
4576 | ||
4577 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
4578 | } | |
4579 | ||
101bb229 TG |
4580 | static inline int rt_scope(int ifa_scope) |
4581 | { | |
4582 | if (ifa_scope & IFA_HOST) | |
4583 | return RT_SCOPE_HOST; | |
4584 | else if (ifa_scope & IFA_LINK) | |
4585 | return RT_SCOPE_LINK; | |
4586 | else if (ifa_scope & IFA_SITE) | |
4587 | return RT_SCOPE_SITE; | |
4588 | else | |
4589 | return RT_SCOPE_UNIVERSE; | |
4590 | } | |
4591 | ||
0ab6803b TG |
4592 | static inline int inet6_ifaddr_msgsize(void) |
4593 | { | |
339bf98f | 4594 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
caeaba79 | 4595 | + nla_total_size(16) /* IFA_LOCAL */ |
339bf98f | 4596 | + nla_total_size(16) /* IFA_ADDRESS */ |
479840ff JP |
4597 | + nla_total_size(sizeof(struct ifa_cacheinfo)) |
4598 | + nla_total_size(4) /* IFA_FLAGS */; | |
0ab6803b | 4599 | } |
c5396a31 | 4600 | |
1da177e4 | 4601 | static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, |
15e47304 | 4602 | u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4 | 4603 | { |
1da177e4 | 4604 | struct nlmsghdr *nlh; |
85486af0 | 4605 | u32 preferred, valid; |
1da177e4 | 4606 | |
15e47304 | 4607 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
63159f29 | 4608 | if (!nlh) |
26932566 | 4609 | return -EMSGSIZE; |
0ab6803b | 4610 | |
101bb229 TG |
4611 | put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), |
4612 | ifa->idev->dev->ifindex); | |
4613 | ||
fad8da3e YA |
4614 | if (!((ifa->flags&IFA_F_PERMANENT) && |
4615 | (ifa->prefered_lft == INFINITY_LIFE_TIME))) { | |
85486af0 TG |
4616 | preferred = ifa->prefered_lft; |
4617 | valid = ifa->valid_lft; | |
4618 | if (preferred != INFINITY_LIFE_TIME) { | |
1da177e4 | 4619 | long tval = (jiffies - ifa->tstamp)/HZ; |
a1faa698 JR |
4620 | if (preferred > tval) |
4621 | preferred -= tval; | |
4622 | else | |
4623 | preferred = 0; | |
f56619fc BH |
4624 | if (valid != INFINITY_LIFE_TIME) { |
4625 | if (valid > tval) | |
4626 | valid -= tval; | |
4627 | else | |
4628 | valid = 0; | |
4629 | } | |
1da177e4 LT |
4630 | } |
4631 | } else { | |
85486af0 TG |
4632 | preferred = INFINITY_LIFE_TIME; |
4633 | valid = INFINITY_LIFE_TIME; | |
4634 | } | |
4635 | ||
7996c799 | 4636 | if (!ipv6_addr_any(&ifa->peer_addr)) { |
930345ea JB |
4637 | if (nla_put_in6_addr(skb, IFA_LOCAL, &ifa->addr) < 0 || |
4638 | nla_put_in6_addr(skb, IFA_ADDRESS, &ifa->peer_addr) < 0) | |
caeaba79 ND |
4639 | goto error; |
4640 | } else | |
930345ea | 4641 | if (nla_put_in6_addr(skb, IFA_ADDRESS, &ifa->addr) < 0) |
caeaba79 ND |
4642 | goto error; |
4643 | ||
4644 | if (put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) | |
4645 | goto error; | |
1da177e4 | 4646 | |
479840ff JP |
4647 | if (nla_put_u32(skb, IFA_FLAGS, ifa->flags) < 0) |
4648 | goto error; | |
4649 | ||
053c095a JB |
4650 | nlmsg_end(skb, nlh); |
4651 | return 0; | |
caeaba79 ND |
4652 | |
4653 | error: | |
4654 | nlmsg_cancel(skb, nlh); | |
4655 | return -EMSGSIZE; | |
1da177e4 LT |
4656 | } |
4657 | ||
4658 | static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, | |
15e47304 | 4659 | u32 portid, u32 seq, int event, u16 flags) |
1da177e4 | 4660 | { |
1da177e4 | 4661 | struct nlmsghdr *nlh; |
101bb229 TG |
4662 | u8 scope = RT_SCOPE_UNIVERSE; |
4663 | int ifindex = ifmca->idev->dev->ifindex; | |
4664 | ||
4665 | if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE) | |
4666 | scope = RT_SCOPE_SITE; | |
1da177e4 | 4667 | |
15e47304 | 4668 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
63159f29 | 4669 | if (!nlh) |
26932566 | 4670 | return -EMSGSIZE; |
85486af0 | 4671 | |
0ab6803b | 4672 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
930345ea | 4673 | if (nla_put_in6_addr(skb, IFA_MULTICAST, &ifmca->mca_addr) < 0 || |
0ab6803b | 4674 | put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp, |
26932566 PM |
4675 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
4676 | nlmsg_cancel(skb, nlh); | |
4677 | return -EMSGSIZE; | |
4678 | } | |
85486af0 | 4679 | |
053c095a JB |
4680 | nlmsg_end(skb, nlh); |
4681 | return 0; | |
1da177e4 LT |
4682 | } |
4683 | ||
4684 | static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, | |
15e47304 | 4685 | u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4 | 4686 | { |
1da177e4 | 4687 | struct nlmsghdr *nlh; |
101bb229 TG |
4688 | u8 scope = RT_SCOPE_UNIVERSE; |
4689 | int ifindex = ifaca->aca_idev->dev->ifindex; | |
4690 | ||
4691 | if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) | |
4692 | scope = RT_SCOPE_SITE; | |
1da177e4 | 4693 | |
15e47304 | 4694 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags); |
63159f29 | 4695 | if (!nlh) |
26932566 | 4696 | return -EMSGSIZE; |
85486af0 | 4697 | |
0ab6803b | 4698 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
930345ea | 4699 | if (nla_put_in6_addr(skb, IFA_ANYCAST, &ifaca->aca_addr) < 0 || |
0ab6803b | 4700 | put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp, |
26932566 PM |
4701 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
4702 | nlmsg_cancel(skb, nlh); | |
4703 | return -EMSGSIZE; | |
4704 | } | |
1da177e4 | 4705 | |
053c095a JB |
4706 | nlmsg_end(skb, nlh); |
4707 | return 0; | |
1da177e4 LT |
4708 | } |
4709 | ||
e21e8467 | 4710 | enum addr_type_t { |
1da177e4 LT |
4711 | UNICAST_ADDR, |
4712 | MULTICAST_ADDR, | |
4713 | ANYCAST_ADDR, | |
4714 | }; | |
4715 | ||
234b27c3 ED |
4716 | /* called with rcu_read_lock() */ |
4717 | static int in6_dump_addrs(struct inet6_dev *idev, struct sk_buff *skb, | |
4718 | struct netlink_callback *cb, enum addr_type_t type, | |
4719 | int s_ip_idx, int *p_ip_idx) | |
4720 | { | |
234b27c3 ED |
4721 | struct ifmcaddr6 *ifmca; |
4722 | struct ifacaddr6 *ifaca; | |
4723 | int err = 1; | |
4724 | int ip_idx = *p_ip_idx; | |
4725 | ||
4726 | read_lock_bh(&idev->lock); | |
4727 | switch (type) { | |
502a2ffd | 4728 | case UNICAST_ADDR: { |
4729 | struct inet6_ifaddr *ifa; | |
4730 | ||
234b27c3 | 4731 | /* unicast address incl. temp addr */ |
502a2ffd | 4732 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
4733 | if (++ip_idx < s_ip_idx) | |
234b27c3 ED |
4734 | continue; |
4735 | err = inet6_fill_ifaddr(skb, ifa, | |
15e47304 | 4736 | NETLINK_CB(cb->skb).portid, |
234b27c3 ED |
4737 | cb->nlh->nlmsg_seq, |
4738 | RTM_NEWADDR, | |
4739 | NLM_F_MULTI); | |
053c095a | 4740 | if (err < 0) |
234b27c3 | 4741 | break; |
63998ac2 | 4742 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
234b27c3 ED |
4743 | } |
4744 | break; | |
502a2ffd | 4745 | } |
234b27c3 ED |
4746 | case MULTICAST_ADDR: |
4747 | /* multicast address */ | |
4748 | for (ifmca = idev->mc_list; ifmca; | |
4749 | ifmca = ifmca->next, ip_idx++) { | |
4750 | if (ip_idx < s_ip_idx) | |
4751 | continue; | |
4752 | err = inet6_fill_ifmcaddr(skb, ifmca, | |
15e47304 | 4753 | NETLINK_CB(cb->skb).portid, |
234b27c3 ED |
4754 | cb->nlh->nlmsg_seq, |
4755 | RTM_GETMULTICAST, | |
4756 | NLM_F_MULTI); | |
053c095a | 4757 | if (err < 0) |
234b27c3 ED |
4758 | break; |
4759 | } | |
4760 | break; | |
4761 | case ANYCAST_ADDR: | |
4762 | /* anycast address */ | |
4763 | for (ifaca = idev->ac_list; ifaca; | |
4764 | ifaca = ifaca->aca_next, ip_idx++) { | |
4765 | if (ip_idx < s_ip_idx) | |
4766 | continue; | |
4767 | err = inet6_fill_ifacaddr(skb, ifaca, | |
15e47304 | 4768 | NETLINK_CB(cb->skb).portid, |
234b27c3 ED |
4769 | cb->nlh->nlmsg_seq, |
4770 | RTM_GETANYCAST, | |
4771 | NLM_F_MULTI); | |
053c095a | 4772 | if (err < 0) |
234b27c3 ED |
4773 | break; |
4774 | } | |
4775 | break; | |
4776 | default: | |
4777 | break; | |
4778 | } | |
4779 | read_unlock_bh(&idev->lock); | |
4780 | *p_ip_idx = ip_idx; | |
4781 | return err; | |
4782 | } | |
4783 | ||
1da177e4 LT |
4784 | static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, |
4785 | enum addr_type_t type) | |
4786 | { | |
234b27c3 ED |
4787 | struct net *net = sock_net(skb->sk); |
4788 | int h, s_h; | |
1da177e4 LT |
4789 | int idx, ip_idx; |
4790 | int s_idx, s_ip_idx; | |
1da177e4 | 4791 | struct net_device *dev; |
234b27c3 ED |
4792 | struct inet6_dev *idev; |
4793 | struct hlist_head *head; | |
1ab1457c | 4794 | |
234b27c3 ED |
4795 | s_h = cb->args[0]; |
4796 | s_idx = idx = cb->args[1]; | |
4797 | s_ip_idx = ip_idx = cb->args[2]; | |
5d5619b4 | 4798 | |
234b27c3 | 4799 | rcu_read_lock(); |
63998ac2 | 4800 | cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^ net->dev_base_seq; |
234b27c3 ED |
4801 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { |
4802 | idx = 0; | |
4803 | head = &net->dev_index_head[h]; | |
b67bfe0d | 4804 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
234b27c3 ED |
4805 | if (idx < s_idx) |
4806 | goto cont; | |
4b97efdf | 4807 | if (h > s_h || idx > s_idx) |
234b27c3 ED |
4808 | s_ip_idx = 0; |
4809 | ip_idx = 0; | |
e21e8467 SH |
4810 | idev = __in6_dev_get(dev); |
4811 | if (!idev) | |
234b27c3 ED |
4812 | goto cont; |
4813 | ||
4814 | if (in6_dump_addrs(idev, skb, cb, type, | |
7b46a644 | 4815 | s_ip_idx, &ip_idx) < 0) |
234b27c3 | 4816 | goto done; |
7562f876 | 4817 | cont: |
234b27c3 ED |
4818 | idx++; |
4819 | } | |
1da177e4 | 4820 | } |
234b27c3 ED |
4821 | done: |
4822 | rcu_read_unlock(); | |
4823 | cb->args[0] = h; | |
4824 | cb->args[1] = idx; | |
4825 | cb->args[2] = ip_idx; | |
4826 | ||
1da177e4 LT |
4827 | return skb->len; |
4828 | } | |
4829 | ||
4830 | static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
4831 | { | |
4832 | enum addr_type_t type = UNICAST_ADDR; | |
b854272b | 4833 | |
1da177e4 LT |
4834 | return inet6_dump_addr(skb, cb, type); |
4835 | } | |
4836 | ||
4837 | static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
4838 | { | |
4839 | enum addr_type_t type = MULTICAST_ADDR; | |
b854272b | 4840 | |
1da177e4 LT |
4841 | return inet6_dump_addr(skb, cb, type); |
4842 | } | |
4843 | ||
4844 | ||
4845 | static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
4846 | { | |
4847 | enum addr_type_t type = ANYCAST_ADDR; | |
b854272b | 4848 | |
1da177e4 LT |
4849 | return inet6_dump_addr(skb, cb, type); |
4850 | } | |
4851 | ||
661d2967 | 4852 | static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr *nlh) |
6c223828 | 4853 | { |
3b1e0a65 | 4854 | struct net *net = sock_net(in_skb->sk); |
1b29fc2c TG |
4855 | struct ifaddrmsg *ifm; |
4856 | struct nlattr *tb[IFA_MAX+1]; | |
caeaba79 | 4857 | struct in6_addr *addr = NULL, *peer; |
6c223828 NT |
4858 | struct net_device *dev = NULL; |
4859 | struct inet6_ifaddr *ifa; | |
4860 | struct sk_buff *skb; | |
6c223828 NT |
4861 | int err; |
4862 | ||
1b29fc2c TG |
4863 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); |
4864 | if (err < 0) | |
4865 | goto errout; | |
4866 | ||
caeaba79 | 4867 | addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer); |
63159f29 | 4868 | if (!addr) { |
1b29fc2c TG |
4869 | err = -EINVAL; |
4870 | goto errout; | |
6c223828 | 4871 | } |
6c223828 | 4872 | |
1b29fc2c | 4873 | ifm = nlmsg_data(nlh); |
6c223828 | 4874 | if (ifm->ifa_index) |
6fda7350 | 4875 | dev = __dev_get_by_index(net, ifm->ifa_index); |
6c223828 | 4876 | |
e21e8467 SH |
4877 | ifa = ipv6_get_ifaddr(net, addr, dev, 1); |
4878 | if (!ifa) { | |
1b29fc2c TG |
4879 | err = -EADDRNOTAVAIL; |
4880 | goto errout; | |
4881 | } | |
6c223828 | 4882 | |
e21e8467 SH |
4883 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL); |
4884 | if (!skb) { | |
6c223828 | 4885 | err = -ENOBUFS; |
1b29fc2c | 4886 | goto errout_ifa; |
6c223828 NT |
4887 | } |
4888 | ||
15e47304 | 4889 | err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).portid, |
6c223828 | 4890 | nlh->nlmsg_seq, RTM_NEWADDR, 0); |
26932566 PM |
4891 | if (err < 0) { |
4892 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
4893 | WARN_ON(err == -EMSGSIZE); | |
4894 | kfree_skb(skb); | |
4895 | goto errout_ifa; | |
4896 | } | |
15e47304 | 4897 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); |
1b29fc2c | 4898 | errout_ifa: |
6c223828 | 4899 | in6_ifa_put(ifa); |
1b29fc2c | 4900 | errout: |
6c223828 | 4901 | return err; |
6c223828 NT |
4902 | } |
4903 | ||
1da177e4 LT |
4904 | static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) |
4905 | { | |
4906 | struct sk_buff *skb; | |
c346dca1 | 4907 | struct net *net = dev_net(ifa->idev->dev); |
5d620266 | 4908 | int err = -ENOBUFS; |
1da177e4 | 4909 | |
f784ad3d MB |
4910 | /* Don't send DELADDR notification for TENTATIVE address, |
4911 | * since NEWADDR notification is sent only after removing | |
4912 | * TENTATIVE flag. | |
4913 | */ | |
4914 | if (ifa->flags & IFA_F_TENTATIVE && event == RTM_DELADDR) | |
4915 | return; | |
4916 | ||
0ab6803b | 4917 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); |
63159f29 | 4918 | if (!skb) |
5d620266 TG |
4919 | goto errout; |
4920 | ||
4921 | err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0); | |
26932566 PM |
4922 | if (err < 0) { |
4923 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
4924 | WARN_ON(err == -EMSGSIZE); | |
4925 | kfree_skb(skb); | |
4926 | goto errout; | |
4927 | } | |
1ce85fe4 PNA |
4928 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
4929 | return; | |
5d620266 TG |
4930 | errout: |
4931 | if (err < 0) | |
6fda7350 | 4932 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); |
1da177e4 LT |
4933 | } |
4934 | ||
b6f99a21 | 4935 | static inline void ipv6_store_devconf(struct ipv6_devconf *cnf, |
1da177e4 LT |
4936 | __s32 *array, int bytes) |
4937 | { | |
04561c1f TG |
4938 | BUG_ON(bytes < (DEVCONF_MAX * 4)); |
4939 | ||
1da177e4 LT |
4940 | memset(array, 0, bytes); |
4941 | array[DEVCONF_FORWARDING] = cnf->forwarding; | |
4942 | array[DEVCONF_HOPLIMIT] = cnf->hop_limit; | |
4943 | array[DEVCONF_MTU6] = cnf->mtu6; | |
4944 | array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; | |
4945 | array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; | |
4946 | array[DEVCONF_AUTOCONF] = cnf->autoconf; | |
4947 | array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; | |
4948 | array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; | |
93908d19 TG |
4949 | array[DEVCONF_RTR_SOLICIT_INTERVAL] = |
4950 | jiffies_to_msecs(cnf->rtr_solicit_interval); | |
bd11f074 MŻ |
4951 | array[DEVCONF_RTR_SOLICIT_MAX_INTERVAL] = |
4952 | jiffies_to_msecs(cnf->rtr_solicit_max_interval); | |
93908d19 TG |
4953 | array[DEVCONF_RTR_SOLICIT_DELAY] = |
4954 | jiffies_to_msecs(cnf->rtr_solicit_delay); | |
1da177e4 | 4955 | array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; |
fc4eba58 HFS |
4956 | array[DEVCONF_MLDV1_UNSOLICITED_REPORT_INTERVAL] = |
4957 | jiffies_to_msecs(cnf->mldv1_unsolicited_report_interval); | |
4958 | array[DEVCONF_MLDV2_UNSOLICITED_REPORT_INTERVAL] = | |
4959 | jiffies_to_msecs(cnf->mldv2_unsolicited_report_interval); | |
1da177e4 LT |
4960 | array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; |
4961 | array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; | |
4962 | array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; | |
4963 | array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; | |
4964 | array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; | |
1da177e4 | 4965 | array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; |
65f5c7c1 | 4966 | array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; |
8013d1d7 | 4967 | array[DEVCONF_ACCEPT_RA_MIN_HOP_LIMIT] = cnf->accept_ra_min_hop_limit; |
c4fd30eb | 4968 | array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; |
930d6ff2 YH |
4969 | #ifdef CONFIG_IPV6_ROUTER_PREF |
4970 | array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; | |
93908d19 TG |
4971 | array[DEVCONF_RTR_PROBE_INTERVAL] = |
4972 | jiffies_to_msecs(cnf->rtr_probe_interval); | |
fa03ef38 | 4973 | #ifdef CONFIG_IPV6_ROUTE_INFO |
09c884d4 YH |
4974 | array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; |
4975 | #endif | |
930d6ff2 | 4976 | #endif |
fbea49e1 | 4977 | array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp; |
0bcbc926 | 4978 | array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route; |
95c385b4 NH |
4979 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
4980 | array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad; | |
7fd2561e | 4981 | array[DEVCONF_USE_OPTIMISTIC] = cnf->use_optimistic; |
95c385b4 | 4982 | #endif |
7bc570c8 YH |
4983 | #ifdef CONFIG_IPV6_MROUTE |
4984 | array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding; | |
4985 | #endif | |
778d80be | 4986 | array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6; |
1b34be74 | 4987 | array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad; |
c3faca05 | 4988 | array[DEVCONF_FORCE_TLLAO] = cnf->force_tllao; |
5cb04436 | 4989 | array[DEVCONF_NDISC_NOTIFY] = cnf->ndisc_notify; |
b800c3b9 | 4990 | array[DEVCONF_SUPPRESS_FRAG_NDISC] = cnf->suppress_frag_ndisc; |
d9333196 | 4991 | array[DEVCONF_ACCEPT_RA_FROM_LOCAL] = cnf->accept_ra_from_local; |
c2943f14 | 4992 | array[DEVCONF_ACCEPT_RA_MTU] = cnf->accept_ra_mtu; |
35103d11 | 4993 | array[DEVCONF_IGNORE_ROUTES_WITH_LINKDOWN] = cnf->ignore_routes_with_linkdown; |
3d1bec99 | 4994 | /* we omit DEVCONF_STABLE_SECRET for now */ |
3985e8a3 | 4995 | array[DEVCONF_USE_OIF_ADDRS_ONLY] = cnf->use_oif_addrs_only; |
abbc3043 | 4996 | array[DEVCONF_DROP_UNICAST_IN_L2_MULTICAST] = cnf->drop_unicast_in_l2_multicast; |
7a02bf89 | 4997 | array[DEVCONF_DROP_UNSOLICITED_NA] = cnf->drop_unsolicited_na; |
f1705ec1 | 4998 | array[DEVCONF_KEEP_ADDR_ON_DOWN] = cnf->keep_addr_on_down; |
1ababeba | 4999 | array[DEVCONF_SEG6_ENABLED] = cnf->seg6_enabled; |
bf355b8d DL |
5000 | #ifdef CONFIG_IPV6_SEG6_HMAC |
5001 | array[DEVCONF_SEG6_REQUIRE_HMAC] = cnf->seg6_require_hmac; | |
5002 | #endif | |
adc176c5 | 5003 | array[DEVCONF_ENHANCED_DAD] = cnf->enhanced_dad; |
d35a00b8 | 5004 | array[DEVCONF_ADDR_GEN_MODE] = cnf->addr_gen_mode; |
1da177e4 LT |
5005 | } |
5006 | ||
b382b191 TG |
5007 | static inline size_t inet6_ifla6_size(void) |
5008 | { | |
5009 | return nla_total_size(4) /* IFLA_INET6_FLAGS */ | |
5010 | + nla_total_size(sizeof(struct ifla_cacheinfo)) | |
5011 | + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */ | |
5012 | + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */ | |
f53adae4 DB |
5013 | + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */ |
5014 | + nla_total_size(sizeof(struct in6_addr)); /* IFLA_INET6_TOKEN */ | |
b382b191 TG |
5015 | } |
5016 | ||
339bf98f TG |
5017 | static inline size_t inet6_if_nlmsg_size(void) |
5018 | { | |
5019 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
5020 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
5021 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ | |
5022 | + nla_total_size(4) /* IFLA_MTU */ | |
5023 | + nla_total_size(4) /* IFLA_LINK */ | |
0344338b | 5024 | + nla_total_size(1) /* IFLA_OPERSTATE */ |
b382b191 | 5025 | + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */ |
339bf98f | 5026 | } |
c5396a31 | 5027 | |
be281e55 | 5028 | static inline void __snmp6_fill_statsdev(u64 *stats, atomic_long_t *mib, |
aca05671 | 5029 | int bytes) |
7f7d9a6b HX |
5030 | { |
5031 | int i; | |
aca05671 | 5032 | int pad = bytes - sizeof(u64) * ICMP6_MIB_MAX; |
7f7d9a6b HX |
5033 | BUG_ON(pad < 0); |
5034 | ||
5035 | /* Use put_unaligned() because stats may not be aligned for u64. */ | |
aca05671 JH |
5036 | put_unaligned(ICMP6_MIB_MAX, &stats[0]); |
5037 | for (i = 1; i < ICMP6_MIB_MAX; i++) | |
be281e55 | 5038 | put_unaligned(atomic_long_read(&mib[i]), &stats[i]); |
7f7d9a6b | 5039 | |
aca05671 | 5040 | memset(&stats[ICMP6_MIB_MAX], 0, pad); |
7f7d9a6b HX |
5041 | } |
5042 | ||
698365fa | 5043 | static inline void __snmp6_fill_stats64(u64 *stats, void __percpu *mib, |
a3a77372 | 5044 | int bytes, size_t syncpoff) |
4ce3c183 | 5045 | { |
a3a77372 R |
5046 | int i, c; |
5047 | u64 buff[IPSTATS_MIB_MAX]; | |
5048 | int pad = bytes - sizeof(u64) * IPSTATS_MIB_MAX; | |
5049 | ||
4ce3c183 ED |
5050 | BUG_ON(pad < 0); |
5051 | ||
a3a77372 R |
5052 | memset(buff, 0, sizeof(buff)); |
5053 | buff[0] = IPSTATS_MIB_MAX; | |
4ce3c183 | 5054 | |
a3a77372 R |
5055 | for_each_possible_cpu(c) { |
5056 | for (i = 1; i < IPSTATS_MIB_MAX; i++) | |
5057 | buff[i] += snmp_get_cpu_field64(mib, c, i, syncpoff); | |
5058 | } | |
5059 | ||
5060 | memcpy(stats, buff, IPSTATS_MIB_MAX * sizeof(u64)); | |
5061 | memset(&stats[IPSTATS_MIB_MAX], 0, pad); | |
4ce3c183 ED |
5062 | } |
5063 | ||
7f7d9a6b HX |
5064 | static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype, |
5065 | int bytes) | |
5066 | { | |
e21e8467 | 5067 | switch (attrtype) { |
7f7d9a6b | 5068 | case IFLA_INET6_STATS: |
a3a77372 R |
5069 | __snmp6_fill_stats64(stats, idev->stats.ipv6, bytes, |
5070 | offsetof(struct ipstats_mib, syncp)); | |
7f7d9a6b HX |
5071 | break; |
5072 | case IFLA_INET6_ICMP6STATS: | |
aca05671 | 5073 | __snmp6_fill_statsdev(stats, idev->stats.icmpv6dev->mibs, bytes); |
7f7d9a6b HX |
5074 | break; |
5075 | } | |
5076 | } | |
5077 | ||
d5566fd7 SV |
5078 | static int inet6_fill_ifla6_attrs(struct sk_buff *skb, struct inet6_dev *idev, |
5079 | u32 ext_filter_mask) | |
b382b191 TG |
5080 | { |
5081 | struct nlattr *nla; | |
5082 | struct ifla_cacheinfo ci; | |
5083 | ||
c78679e8 DM |
5084 | if (nla_put_u32(skb, IFLA_INET6_FLAGS, idev->if_flags)) |
5085 | goto nla_put_failure; | |
b382b191 | 5086 | ci.max_reasm_len = IPV6_MAXPLEN; |
24912420 DM |
5087 | ci.tstamp = cstamp_delta(idev->tstamp); |
5088 | ci.reachable_time = jiffies_to_msecs(idev->nd_parms->reachable_time); | |
1f9248e5 | 5089 | ci.retrans_time = jiffies_to_msecs(NEIGH_VAR(idev->nd_parms, RETRANS_TIME)); |
c78679e8 DM |
5090 | if (nla_put(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci)) |
5091 | goto nla_put_failure; | |
b382b191 | 5092 | nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32)); |
63159f29 | 5093 | if (!nla) |
b382b191 TG |
5094 | goto nla_put_failure; |
5095 | ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla)); | |
5096 | ||
5097 | /* XXX - MC not implemented */ | |
5098 | ||
d5566fd7 SV |
5099 | if (ext_filter_mask & RTEXT_FILTER_SKIP_STATS) |
5100 | return 0; | |
5101 | ||
b382b191 | 5102 | nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64)); |
63159f29 | 5103 | if (!nla) |
b382b191 TG |
5104 | goto nla_put_failure; |
5105 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla)); | |
5106 | ||
5107 | nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64)); | |
63159f29 | 5108 | if (!nla) |
b382b191 TG |
5109 | goto nla_put_failure; |
5110 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla)); | |
5111 | ||
f53adae4 | 5112 | nla = nla_reserve(skb, IFLA_INET6_TOKEN, sizeof(struct in6_addr)); |
63159f29 | 5113 | if (!nla) |
f53adae4 | 5114 | goto nla_put_failure; |
bc91b0f0 | 5115 | |
d35a00b8 | 5116 | if (nla_put_u8(skb, IFLA_INET6_ADDR_GEN_MODE, idev->cnf.addr_gen_mode)) |
bc91b0f0 JP |
5117 | goto nla_put_failure; |
5118 | ||
f53adae4 DB |
5119 | read_lock_bh(&idev->lock); |
5120 | memcpy(nla_data(nla), idev->token.s6_addr, nla_len(nla)); | |
5121 | read_unlock_bh(&idev->lock); | |
5122 | ||
b382b191 TG |
5123 | return 0; |
5124 | ||
5125 | nla_put_failure: | |
5126 | return -EMSGSIZE; | |
5127 | } | |
5128 | ||
b1974ed0 AR |
5129 | static size_t inet6_get_link_af_size(const struct net_device *dev, |
5130 | u32 ext_filter_mask) | |
b382b191 TG |
5131 | { |
5132 | if (!__in6_dev_get(dev)) | |
5133 | return 0; | |
5134 | ||
5135 | return inet6_ifla6_size(); | |
5136 | } | |
5137 | ||
d5566fd7 SV |
5138 | static int inet6_fill_link_af(struct sk_buff *skb, const struct net_device *dev, |
5139 | u32 ext_filter_mask) | |
b382b191 TG |
5140 | { |
5141 | struct inet6_dev *idev = __in6_dev_get(dev); | |
5142 | ||
5143 | if (!idev) | |
5144 | return -ENODATA; | |
5145 | ||
d5566fd7 | 5146 | if (inet6_fill_ifla6_attrs(skb, idev, ext_filter_mask) < 0) |
b382b191 TG |
5147 | return -EMSGSIZE; |
5148 | ||
5149 | return 0; | |
5150 | } | |
5151 | ||
f53adae4 DB |
5152 | static int inet6_set_iftoken(struct inet6_dev *idev, struct in6_addr *token) |
5153 | { | |
f53adae4 DB |
5154 | struct inet6_ifaddr *ifp; |
5155 | struct net_device *dev = idev->dev; | |
47e27d5e | 5156 | bool clear_token, update_rs = false; |
dc848292 | 5157 | struct in6_addr ll_addr; |
f53adae4 | 5158 | |
c15b1cca HFS |
5159 | ASSERT_RTNL(); |
5160 | ||
63159f29 | 5161 | if (!token) |
f53adae4 | 5162 | return -EINVAL; |
f53adae4 DB |
5163 | if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) |
5164 | return -EINVAL; | |
f53adae4 DB |
5165 | if (!ipv6_accept_ra(idev)) |
5166 | return -EINVAL; | |
bd11f074 | 5167 | if (idev->cnf.rtr_solicits == 0) |
f53adae4 DB |
5168 | return -EINVAL; |
5169 | ||
5170 | write_lock_bh(&idev->lock); | |
5171 | ||
5172 | BUILD_BUG_ON(sizeof(token->s6_addr) != 16); | |
5173 | memcpy(idev->token.s6_addr + 8, token->s6_addr + 8, 8); | |
5174 | ||
5175 | write_unlock_bh(&idev->lock); | |
5176 | ||
47e27d5e DB |
5177 | clear_token = ipv6_addr_any(token); |
5178 | if (clear_token) | |
5179 | goto update_lft; | |
5180 | ||
dc848292 HFS |
5181 | if (!idev->dead && (idev->if_flags & IF_READY) && |
5182 | !ipv6_get_lladdr(dev, &ll_addr, IFA_F_TENTATIVE | | |
5183 | IFA_F_OPTIMISTIC)) { | |
fc403832 DB |
5184 | /* If we're not ready, then normal ifup will take care |
5185 | * of this. Otherwise, we need to request our rs here. | |
5186 | */ | |
5187 | ndisc_send_rs(dev, &ll_addr, &in6addr_linklocal_allrouters); | |
5188 | update_rs = true; | |
5189 | } | |
f53adae4 | 5190 | |
47e27d5e | 5191 | update_lft: |
f53adae4 | 5192 | write_lock_bh(&idev->lock); |
fc403832 | 5193 | |
77ecaace | 5194 | if (update_rs) { |
fc403832 | 5195 | idev->if_flags |= IF_RS_SENT; |
bd11f074 MŻ |
5196 | idev->rs_interval = rfc3315_s14_backoff_init( |
5197 | idev->cnf.rtr_solicit_interval); | |
77ecaace | 5198 | idev->rs_probes = 1; |
bd11f074 | 5199 | addrconf_mod_rs_timer(idev, idev->rs_interval); |
77ecaace | 5200 | } |
f53adae4 DB |
5201 | |
5202 | /* Well, that's kinda nasty ... */ | |
5203 | list_for_each_entry(ifp, &idev->addr_list, if_list) { | |
5204 | spin_lock(&ifp->lock); | |
617fe29d | 5205 | if (ifp->tokenized) { |
f53adae4 DB |
5206 | ifp->valid_lft = 0; |
5207 | ifp->prefered_lft = 0; | |
5208 | } | |
5209 | spin_unlock(&ifp->lock); | |
5210 | } | |
5211 | ||
5212 | write_unlock_bh(&idev->lock); | |
b2ed64a9 | 5213 | inet6_ifinfo_notify(RTM_NEWLINK, idev); |
c15b1cca | 5214 | addrconf_verify_rtnl(); |
f53adae4 DB |
5215 | return 0; |
5216 | } | |
5217 | ||
11b1f828 DB |
5218 | static const struct nla_policy inet6_af_policy[IFLA_INET6_MAX + 1] = { |
5219 | [IFLA_INET6_ADDR_GEN_MODE] = { .type = NLA_U8 }, | |
5220 | [IFLA_INET6_TOKEN] = { .len = sizeof(struct in6_addr) }, | |
5221 | }; | |
5222 | ||
5223 | static int inet6_validate_link_af(const struct net_device *dev, | |
5224 | const struct nlattr *nla) | |
5225 | { | |
5226 | struct nlattr *tb[IFLA_INET6_MAX + 1]; | |
5227 | ||
5228 | if (dev && !__in6_dev_get(dev)) | |
5229 | return -EAFNOSUPPORT; | |
5230 | ||
5231 | return nla_parse_nested(tb, IFLA_INET6_MAX, nla, inet6_af_policy); | |
5232 | } | |
5233 | ||
d35a00b8 FJ |
5234 | static int check_addr_gen_mode(int mode) |
5235 | { | |
5236 | if (mode != IN6_ADDR_GEN_MODE_EUI64 && | |
5237 | mode != IN6_ADDR_GEN_MODE_NONE && | |
5238 | mode != IN6_ADDR_GEN_MODE_STABLE_PRIVACY && | |
5239 | mode != IN6_ADDR_GEN_MODE_RANDOM) | |
5240 | return -EINVAL; | |
5241 | return 1; | |
5242 | } | |
5243 | ||
5244 | static int check_stable_privacy(struct inet6_dev *idev, struct net *net, | |
5245 | int mode) | |
5246 | { | |
5247 | if (mode == IN6_ADDR_GEN_MODE_STABLE_PRIVACY && | |
5248 | !idev->cnf.stable_secret.initialized && | |
5249 | !net->ipv6.devconf_dflt->stable_secret.initialized) | |
5250 | return -EINVAL; | |
5251 | return 1; | |
5252 | } | |
5253 | ||
f53adae4 DB |
5254 | static int inet6_set_link_af(struct net_device *dev, const struct nlattr *nla) |
5255 | { | |
5256 | int err = -EINVAL; | |
5257 | struct inet6_dev *idev = __in6_dev_get(dev); | |
5258 | struct nlattr *tb[IFLA_INET6_MAX + 1]; | |
5259 | ||
5260 | if (!idev) | |
5261 | return -EAFNOSUPPORT; | |
5262 | ||
5263 | if (nla_parse_nested(tb, IFLA_INET6_MAX, nla, NULL) < 0) | |
5264 | BUG(); | |
5265 | ||
bc91b0f0 | 5266 | if (tb[IFLA_INET6_TOKEN]) { |
f53adae4 | 5267 | err = inet6_set_iftoken(idev, nla_data(tb[IFLA_INET6_TOKEN])); |
bc91b0f0 JP |
5268 | if (err) |
5269 | return err; | |
5270 | } | |
5271 | ||
5272 | if (tb[IFLA_INET6_ADDR_GEN_MODE]) { | |
5273 | u8 mode = nla_get_u8(tb[IFLA_INET6_ADDR_GEN_MODE]); | |
5274 | ||
d35a00b8 FJ |
5275 | if (check_addr_gen_mode(mode) < 0 || |
5276 | check_stable_privacy(idev, dev_net(dev), mode) < 0) | |
bc91b0f0 | 5277 | return -EINVAL; |
622c81d5 | 5278 | |
d35a00b8 | 5279 | idev->cnf.addr_gen_mode = mode; |
bc91b0f0 JP |
5280 | err = 0; |
5281 | } | |
f53adae4 DB |
5282 | |
5283 | return err; | |
5284 | } | |
5285 | ||
1ab1457c | 5286 | static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, |
15e47304 | 5287 | u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4 | 5288 | { |
04561c1f | 5289 | struct net_device *dev = idev->dev; |
04561c1f TG |
5290 | struct ifinfomsg *hdr; |
5291 | struct nlmsghdr *nlh; | |
5292 | void *protoinfo; | |
04561c1f | 5293 | |
15e47304 | 5294 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*hdr), flags); |
63159f29 | 5295 | if (!nlh) |
26932566 | 5296 | return -EMSGSIZE; |
04561c1f TG |
5297 | |
5298 | hdr = nlmsg_data(nlh); | |
5299 | hdr->ifi_family = AF_INET6; | |
5300 | hdr->__ifi_pad = 0; | |
5301 | hdr->ifi_type = dev->type; | |
5302 | hdr->ifi_index = dev->ifindex; | |
5303 | hdr->ifi_flags = dev_get_flags(dev); | |
5304 | hdr->ifi_change = 0; | |
5305 | ||
c78679e8 DM |
5306 | if (nla_put_string(skb, IFLA_IFNAME, dev->name) || |
5307 | (dev->addr_len && | |
5308 | nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || | |
5309 | nla_put_u32(skb, IFLA_MTU, dev->mtu) || | |
a54acb3a | 5310 | (dev->ifindex != dev_get_iflink(dev) && |
0344338b AG |
5311 | nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) || |
5312 | nla_put_u8(skb, IFLA_OPERSTATE, | |
5313 | netif_running(dev) ? dev->operstate : IF_OPER_DOWN)) | |
c78679e8 | 5314 | goto nla_put_failure; |
04561c1f | 5315 | protoinfo = nla_nest_start(skb, IFLA_PROTINFO); |
63159f29 | 5316 | if (!protoinfo) |
04561c1f | 5317 | goto nla_put_failure; |
1da177e4 | 5318 | |
d5566fd7 | 5319 | if (inet6_fill_ifla6_attrs(skb, idev, 0) < 0) |
bf99f1bd | 5320 | goto nla_put_failure; |
1da177e4 | 5321 | |
04561c1f | 5322 | nla_nest_end(skb, protoinfo); |
053c095a JB |
5323 | nlmsg_end(skb, nlh); |
5324 | return 0; | |
1da177e4 | 5325 | |
04561c1f | 5326 | nla_put_failure: |
26932566 PM |
5327 | nlmsg_cancel(skb, nlh); |
5328 | return -EMSGSIZE; | |
1da177e4 LT |
5329 | } |
5330 | ||
5331 | static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) | |
5332 | { | |
3b1e0a65 | 5333 | struct net *net = sock_net(skb->sk); |
84d2697d | 5334 | int h, s_h; |
434a8a58 | 5335 | int idx = 0, s_idx; |
1da177e4 LT |
5336 | struct net_device *dev; |
5337 | struct inet6_dev *idev; | |
84d2697d | 5338 | struct hlist_head *head; |
1da177e4 | 5339 | |
84d2697d ED |
5340 | s_h = cb->args[0]; |
5341 | s_idx = cb->args[1]; | |
5342 | ||
5343 | rcu_read_lock(); | |
5344 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
5345 | idx = 0; | |
5346 | head = &net->dev_index_head[h]; | |
b67bfe0d | 5347 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
84d2697d ED |
5348 | if (idx < s_idx) |
5349 | goto cont; | |
5350 | idev = __in6_dev_get(dev); | |
5351 | if (!idev) | |
5352 | goto cont; | |
5353 | if (inet6_fill_ifinfo(skb, idev, | |
15e47304 | 5354 | NETLINK_CB(cb->skb).portid, |
84d2697d | 5355 | cb->nlh->nlmsg_seq, |
053c095a | 5356 | RTM_NEWLINK, NLM_F_MULTI) < 0) |
84d2697d | 5357 | goto out; |
7562f876 | 5358 | cont: |
84d2697d ED |
5359 | idx++; |
5360 | } | |
1da177e4 | 5361 | } |
84d2697d ED |
5362 | out: |
5363 | rcu_read_unlock(); | |
5364 | cb->args[1] = idx; | |
5365 | cb->args[0] = h; | |
1da177e4 LT |
5366 | |
5367 | return skb->len; | |
5368 | } | |
5369 | ||
5370 | void inet6_ifinfo_notify(int event, struct inet6_dev *idev) | |
5371 | { | |
5372 | struct sk_buff *skb; | |
c346dca1 | 5373 | struct net *net = dev_net(idev->dev); |
8d7a76c9 | 5374 | int err = -ENOBUFS; |
1ab1457c | 5375 | |
339bf98f | 5376 | skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC); |
63159f29 | 5377 | if (!skb) |
8d7a76c9 TG |
5378 | goto errout; |
5379 | ||
5380 | err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); | |
26932566 PM |
5381 | if (err < 0) { |
5382 | /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */ | |
5383 | WARN_ON(err == -EMSGSIZE); | |
5384 | kfree_skb(skb); | |
5385 | goto errout; | |
5386 | } | |
5f75a104 | 5387 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFINFO, NULL, GFP_ATOMIC); |
1ce85fe4 | 5388 | return; |
8d7a76c9 TG |
5389 | errout: |
5390 | if (err < 0) | |
5f75a104 | 5391 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFINFO, err); |
1da177e4 LT |
5392 | } |
5393 | ||
339bf98f TG |
5394 | static inline size_t inet6_prefix_nlmsg_size(void) |
5395 | { | |
5396 | return NLMSG_ALIGN(sizeof(struct prefixmsg)) | |
5397 | + nla_total_size(sizeof(struct in6_addr)) | |
5398 | + nla_total_size(sizeof(struct prefix_cacheinfo)); | |
5399 | } | |
c5396a31 | 5400 | |
1da177e4 | 5401 | static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, |
15e47304 | 5402 | struct prefix_info *pinfo, u32 portid, u32 seq, |
6051e2f4 | 5403 | int event, unsigned int flags) |
1da177e4 | 5404 | { |
6051e2f4 TG |
5405 | struct prefixmsg *pmsg; |
5406 | struct nlmsghdr *nlh; | |
1da177e4 LT |
5407 | struct prefix_cacheinfo ci; |
5408 | ||
15e47304 | 5409 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*pmsg), flags); |
63159f29 | 5410 | if (!nlh) |
26932566 | 5411 | return -EMSGSIZE; |
6051e2f4 TG |
5412 | |
5413 | pmsg = nlmsg_data(nlh); | |
1da177e4 | 5414 | pmsg->prefix_family = AF_INET6; |
8a47077a PM |
5415 | pmsg->prefix_pad1 = 0; |
5416 | pmsg->prefix_pad2 = 0; | |
1da177e4 LT |
5417 | pmsg->prefix_ifindex = idev->dev->ifindex; |
5418 | pmsg->prefix_len = pinfo->prefix_len; | |
5419 | pmsg->prefix_type = pinfo->type; | |
8a47077a | 5420 | pmsg->prefix_pad3 = 0; |
1da177e4 LT |
5421 | pmsg->prefix_flags = 0; |
5422 | if (pinfo->onlink) | |
5423 | pmsg->prefix_flags |= IF_PREFIX_ONLINK; | |
5424 | if (pinfo->autoconf) | |
5425 | pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; | |
5426 | ||
c78679e8 DM |
5427 | if (nla_put(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix)) |
5428 | goto nla_put_failure; | |
1da177e4 LT |
5429 | ci.preferred_time = ntohl(pinfo->prefered); |
5430 | ci.valid_time = ntohl(pinfo->valid); | |
c78679e8 DM |
5431 | if (nla_put(skb, PREFIX_CACHEINFO, sizeof(ci), &ci)) |
5432 | goto nla_put_failure; | |
053c095a JB |
5433 | nlmsg_end(skb, nlh); |
5434 | return 0; | |
1da177e4 | 5435 | |
6051e2f4 | 5436 | nla_put_failure: |
26932566 PM |
5437 | nlmsg_cancel(skb, nlh); |
5438 | return -EMSGSIZE; | |
1da177e4 LT |
5439 | } |
5440 | ||
1ab1457c | 5441 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 LT |
5442 | struct prefix_info *pinfo) |
5443 | { | |
5444 | struct sk_buff *skb; | |
c346dca1 | 5445 | struct net *net = dev_net(idev->dev); |
8c384bfa | 5446 | int err = -ENOBUFS; |
1da177e4 | 5447 | |
339bf98f | 5448 | skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC); |
63159f29 | 5449 | if (!skb) |
8c384bfa TG |
5450 | goto errout; |
5451 | ||
5452 | err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); | |
26932566 PM |
5453 | if (err < 0) { |
5454 | /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */ | |
5455 | WARN_ON(err == -EMSGSIZE); | |
5456 | kfree_skb(skb); | |
5457 | goto errout; | |
5458 | } | |
1ce85fe4 PNA |
5459 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); |
5460 | return; | |
8c384bfa TG |
5461 | errout: |
5462 | if (err < 0) | |
6fda7350 | 5463 | rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err); |
1da177e4 LT |
5464 | } |
5465 | ||
1da177e4 LT |
5466 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) |
5467 | { | |
63998ac2 ND |
5468 | struct net *net = dev_net(ifp->idev->dev); |
5469 | ||
c15b1cca HFS |
5470 | if (event) |
5471 | ASSERT_RTNL(); | |
5472 | ||
1da177e4 LT |
5473 | inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); |
5474 | ||
5475 | switch (event) { | |
5476 | case RTM_NEWADDR: | |
95c385b4 NH |
5477 | /* |
5478 | * If the address was optimistic | |
5479 | * we inserted the route at the start of | |
5480 | * our DAD process, so we don't need | |
5481 | * to do it again | |
5482 | */ | |
5483 | if (!(ifp->rt->rt6i_node)) | |
5484 | ip6_ins_rt(ifp->rt); | |
1da177e4 LT |
5485 | if (ifp->idev->cnf.forwarding) |
5486 | addrconf_join_anycast(ifp); | |
7996c799 | 5487 | if (!ipv6_addr_any(&ifp->peer_addr)) |
caeaba79 ND |
5488 | addrconf_prefix_route(&ifp->peer_addr, 128, |
5489 | ifp->idev->dev, 0, 0); | |
1da177e4 LT |
5490 | break; |
5491 | case RTM_DELADDR: | |
5492 | if (ifp->idev->cnf.forwarding) | |
5493 | addrconf_leave_anycast(ifp); | |
5494 | addrconf_leave_solict(ifp->idev, &ifp->addr); | |
7996c799 | 5495 | if (!ipv6_addr_any(&ifp->peer_addr)) { |
caeaba79 | 5496 | struct rt6_info *rt; |
caeaba79 | 5497 | |
e7478dfc ND |
5498 | rt = addrconf_get_prefix_route(&ifp->peer_addr, 128, |
5499 | ifp->idev->dev, 0, 0); | |
8e3d5be7 MKL |
5500 | if (rt) |
5501 | ip6_del_rt(rt); | |
caeaba79 | 5502 | } |
38bd10c4 DA |
5503 | if (ifp->rt) { |
5504 | dst_hold(&ifp->rt->dst); | |
5505 | ip6_del_rt(ifp->rt); | |
5506 | } | |
705f1c86 | 5507 | rt_genid_bump_ipv6(net); |
1da177e4 LT |
5508 | break; |
5509 | } | |
63998ac2 | 5510 | atomic_inc(&net->ipv6.dev_addr_genid); |
1da177e4 LT |
5511 | } |
5512 | ||
5513 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) | |
5514 | { | |
8814c4b5 | 5515 | rcu_read_lock_bh(); |
1da177e4 LT |
5516 | if (likely(ifp->idev->dead == 0)) |
5517 | __ipv6_ifa_notify(event, ifp); | |
8814c4b5 | 5518 | rcu_read_unlock_bh(); |
1da177e4 LT |
5519 | } |
5520 | ||
5521 | #ifdef CONFIG_SYSCTL | |
5522 | ||
5523 | static | |
fe2c6338 | 5524 | int addrconf_sysctl_forward(struct ctl_table *ctl, int write, |
1da177e4 LT |
5525 | void __user *buffer, size_t *lenp, loff_t *ppos) |
5526 | { | |
5527 | int *valp = ctl->data; | |
5528 | int val = *valp; | |
88af182e | 5529 | loff_t pos = *ppos; |
fe2c6338 | 5530 | struct ctl_table lctl; |
1da177e4 LT |
5531 | int ret; |
5532 | ||
013d97e9 FR |
5533 | /* |
5534 | * ctl->data points to idev->cnf.forwarding, we should | |
5535 | * not modify it until we get the rtnl lock. | |
5536 | */ | |
5537 | lctl = *ctl; | |
5538 | lctl.data = &val; | |
5539 | ||
5540 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); | |
1da177e4 | 5541 | |
c8fecf22 | 5542 | if (write) |
b325fddb | 5543 | ret = addrconf_fixup_forwarding(ctl, valp, val); |
88af182e EB |
5544 | if (ret) |
5545 | *ppos = pos; | |
1ab1457c | 5546 | return ret; |
1da177e4 LT |
5547 | } |
5548 | ||
77751427 ML |
5549 | static |
5550 | int addrconf_sysctl_mtu(struct ctl_table *ctl, int write, | |
5551 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
5552 | { | |
5553 | struct inet6_dev *idev = ctl->extra1; | |
5554 | int min_mtu = IPV6_MIN_MTU; | |
5555 | struct ctl_table lctl; | |
5556 | ||
5557 | lctl = *ctl; | |
5558 | lctl.extra1 = &min_mtu; | |
5559 | lctl.extra2 = idev ? &idev->dev->mtu : NULL; | |
5560 | ||
5561 | return proc_dointvec_minmax(&lctl, write, buffer, lenp, ppos); | |
5562 | } | |
5563 | ||
56d417b1 BH |
5564 | static void dev_disable_change(struct inet6_dev *idev) |
5565 | { | |
75538c2b CW |
5566 | struct netdev_notifier_info info; |
5567 | ||
56d417b1 BH |
5568 | if (!idev || !idev->dev) |
5569 | return; | |
5570 | ||
75538c2b | 5571 | netdev_notifier_info_init(&info, idev->dev); |
56d417b1 | 5572 | if (idev->cnf.disable_ipv6) |
75538c2b | 5573 | addrconf_notify(NULL, NETDEV_DOWN, &info); |
56d417b1 | 5574 | else |
75538c2b | 5575 | addrconf_notify(NULL, NETDEV_UP, &info); |
56d417b1 BH |
5576 | } |
5577 | ||
5578 | static void addrconf_disable_change(struct net *net, __s32 newf) | |
5579 | { | |
5580 | struct net_device *dev; | |
5581 | struct inet6_dev *idev; | |
5582 | ||
03e4deff | 5583 | for_each_netdev(net, dev) { |
56d417b1 BH |
5584 | idev = __in6_dev_get(dev); |
5585 | if (idev) { | |
5586 | int changed = (!idev->cnf.disable_ipv6) ^ (!newf); | |
5587 | idev->cnf.disable_ipv6 = newf; | |
5588 | if (changed) | |
5589 | dev_disable_change(idev); | |
5590 | } | |
56d417b1 | 5591 | } |
56d417b1 BH |
5592 | } |
5593 | ||
013d97e9 | 5594 | static int addrconf_disable_ipv6(struct ctl_table *table, int *p, int newf) |
56d417b1 BH |
5595 | { |
5596 | struct net *net; | |
013d97e9 FR |
5597 | int old; |
5598 | ||
5599 | if (!rtnl_trylock()) | |
5600 | return restart_syscall(); | |
56d417b1 BH |
5601 | |
5602 | net = (struct net *)table->extra2; | |
013d97e9 FR |
5603 | old = *p; |
5604 | *p = newf; | |
56d417b1 | 5605 | |
013d97e9 FR |
5606 | if (p == &net->ipv6.devconf_dflt->disable_ipv6) { |
5607 | rtnl_unlock(); | |
56d417b1 | 5608 | return 0; |
88af182e | 5609 | } |
56d417b1 BH |
5610 | |
5611 | if (p == &net->ipv6.devconf_all->disable_ipv6) { | |
56d417b1 BH |
5612 | net->ipv6.devconf_dflt->disable_ipv6 = newf; |
5613 | addrconf_disable_change(net, newf); | |
013d97e9 | 5614 | } else if ((!newf) ^ (!old)) |
56d417b1 BH |
5615 | dev_disable_change((struct inet6_dev *)table->extra1); |
5616 | ||
5617 | rtnl_unlock(); | |
5618 | return 0; | |
5619 | } | |
5620 | ||
5621 | static | |
fe2c6338 | 5622 | int addrconf_sysctl_disable(struct ctl_table *ctl, int write, |
56d417b1 BH |
5623 | void __user *buffer, size_t *lenp, loff_t *ppos) |
5624 | { | |
5625 | int *valp = ctl->data; | |
5626 | int val = *valp; | |
88af182e | 5627 | loff_t pos = *ppos; |
fe2c6338 | 5628 | struct ctl_table lctl; |
56d417b1 BH |
5629 | int ret; |
5630 | ||
013d97e9 FR |
5631 | /* |
5632 | * ctl->data points to idev->cnf.disable_ipv6, we should | |
5633 | * not modify it until we get the rtnl lock. | |
5634 | */ | |
5635 | lctl = *ctl; | |
5636 | lctl.data = &val; | |
5637 | ||
5638 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); | |
56d417b1 BH |
5639 | |
5640 | if (write) | |
5641 | ret = addrconf_disable_ipv6(ctl, valp, val); | |
88af182e EB |
5642 | if (ret) |
5643 | *ppos = pos; | |
56d417b1 BH |
5644 | return ret; |
5645 | } | |
5646 | ||
c92d5491 | 5647 | static |
5648 | int addrconf_sysctl_proxy_ndp(struct ctl_table *ctl, int write, | |
5649 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
5650 | { | |
5651 | int *valp = ctl->data; | |
5652 | int ret; | |
5653 | int old, new; | |
5654 | ||
5655 | old = *valp; | |
5656 | ret = proc_dointvec(ctl, write, buffer, lenp, ppos); | |
5657 | new = *valp; | |
5658 | ||
5659 | if (write && old != new) { | |
5660 | struct net *net = ctl->extra2; | |
5661 | ||
5662 | if (!rtnl_trylock()) | |
5663 | return restart_syscall(); | |
5664 | ||
5665 | if (valp == &net->ipv6.devconf_dflt->proxy_ndp) | |
5666 | inet6_netconf_notify_devconf(net, NETCONFA_PROXY_NEIGH, | |
5667 | NETCONFA_IFINDEX_DEFAULT, | |
5668 | net->ipv6.devconf_dflt); | |
5669 | else if (valp == &net->ipv6.devconf_all->proxy_ndp) | |
5670 | inet6_netconf_notify_devconf(net, NETCONFA_PROXY_NEIGH, | |
5671 | NETCONFA_IFINDEX_ALL, | |
5672 | net->ipv6.devconf_all); | |
5673 | else { | |
5674 | struct inet6_dev *idev = ctl->extra1; | |
5675 | ||
5676 | inet6_netconf_notify_devconf(net, NETCONFA_PROXY_NEIGH, | |
5677 | idev->dev->ifindex, | |
5678 | &idev->cnf); | |
5679 | } | |
5680 | rtnl_unlock(); | |
5681 | } | |
5682 | ||
5683 | return ret; | |
5684 | } | |
5685 | ||
d35a00b8 FJ |
5686 | static int addrconf_sysctl_addr_gen_mode(struct ctl_table *ctl, int write, |
5687 | void __user *buffer, size_t *lenp, | |
5688 | loff_t *ppos) | |
5689 | { | |
5690 | int ret = 0; | |
5691 | int new_val; | |
5692 | struct inet6_dev *idev = (struct inet6_dev *)ctl->extra1; | |
5693 | struct net *net = (struct net *)ctl->extra2; | |
5694 | ||
5695 | ret = proc_dointvec(ctl, write, buffer, lenp, ppos); | |
5696 | ||
5697 | if (write) { | |
5698 | new_val = *((int *)ctl->data); | |
5699 | ||
5700 | if (check_addr_gen_mode(new_val) < 0) | |
5701 | return -EINVAL; | |
5702 | ||
5703 | /* request for default */ | |
5704 | if (&net->ipv6.devconf_dflt->addr_gen_mode == ctl->data) { | |
5705 | ipv6_devconf_dflt.addr_gen_mode = new_val; | |
5706 | ||
5707 | /* request for individual net device */ | |
5708 | } else { | |
5709 | if (!idev) | |
5710 | return ret; | |
5711 | ||
5712 | if (check_stable_privacy(idev, net, new_val) < 0) | |
5713 | return -EINVAL; | |
5714 | ||
5715 | if (idev->cnf.addr_gen_mode != new_val) { | |
5716 | idev->cnf.addr_gen_mode = new_val; | |
5717 | rtnl_lock(); | |
5718 | addrconf_dev_config(idev->dev); | |
5719 | rtnl_unlock(); | |
5720 | } | |
5721 | } | |
5722 | } | |
5723 | ||
5724 | return ret; | |
5725 | } | |
5726 | ||
3d1bec99 HFS |
5727 | static int addrconf_sysctl_stable_secret(struct ctl_table *ctl, int write, |
5728 | void __user *buffer, size_t *lenp, | |
5729 | loff_t *ppos) | |
5730 | { | |
5731 | int err; | |
5732 | struct in6_addr addr; | |
5733 | char str[IPV6_MAX_STRLEN]; | |
5734 | struct ctl_table lctl = *ctl; | |
622c81d5 | 5735 | struct net *net = ctl->extra2; |
3d1bec99 HFS |
5736 | struct ipv6_stable_secret *secret = ctl->data; |
5737 | ||
622c81d5 HFS |
5738 | if (&net->ipv6.devconf_all->stable_secret == ctl->data) |
5739 | return -EIO; | |
5740 | ||
3d1bec99 HFS |
5741 | lctl.maxlen = IPV6_MAX_STRLEN; |
5742 | lctl.data = str; | |
5743 | ||
5744 | if (!rtnl_trylock()) | |
5745 | return restart_syscall(); | |
5746 | ||
5747 | if (!write && !secret->initialized) { | |
5748 | err = -EIO; | |
5749 | goto out; | |
5750 | } | |
5751 | ||
5449a5ca WC |
5752 | err = snprintf(str, sizeof(str), "%pI6", &secret->secret); |
5753 | if (err >= sizeof(str)) { | |
5754 | err = -EIO; | |
5755 | goto out; | |
3d1bec99 HFS |
5756 | } |
5757 | ||
5758 | err = proc_dostring(&lctl, write, buffer, lenp, ppos); | |
5759 | if (err || !write) | |
5760 | goto out; | |
5761 | ||
5762 | if (in6_pton(str, -1, addr.in6_u.u6_addr8, -1, NULL) != 1) { | |
5763 | err = -EIO; | |
5764 | goto out; | |
5765 | } | |
5766 | ||
5767 | secret->initialized = true; | |
5768 | secret->secret = addr; | |
5769 | ||
622c81d5 HFS |
5770 | if (&net->ipv6.devconf_dflt->stable_secret == ctl->data) { |
5771 | struct net_device *dev; | |
5772 | ||
5773 | for_each_netdev(net, dev) { | |
5774 | struct inet6_dev *idev = __in6_dev_get(dev); | |
5775 | ||
5776 | if (idev) { | |
d35a00b8 | 5777 | idev->cnf.addr_gen_mode = |
622c81d5 HFS |
5778 | IN6_ADDR_GEN_MODE_STABLE_PRIVACY; |
5779 | } | |
5780 | } | |
5781 | } else { | |
5782 | struct inet6_dev *idev = ctl->extra1; | |
5783 | ||
d35a00b8 | 5784 | idev->cnf.addr_gen_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY; |
622c81d5 HFS |
5785 | } |
5786 | ||
3d1bec99 HFS |
5787 | out: |
5788 | rtnl_unlock(); | |
5789 | ||
5790 | return err; | |
5791 | } | |
c92d5491 | 5792 | |
35103d11 AG |
5793 | static |
5794 | int addrconf_sysctl_ignore_routes_with_linkdown(struct ctl_table *ctl, | |
5795 | int write, | |
5796 | void __user *buffer, | |
5797 | size_t *lenp, | |
5798 | loff_t *ppos) | |
5799 | { | |
5800 | int *valp = ctl->data; | |
5801 | int val = *valp; | |
5802 | loff_t pos = *ppos; | |
5803 | struct ctl_table lctl; | |
5804 | int ret; | |
5805 | ||
5806 | /* ctl->data points to idev->cnf.ignore_routes_when_linkdown | |
5807 | * we should not modify it until we get the rtnl lock. | |
5808 | */ | |
5809 | lctl = *ctl; | |
5810 | lctl.data = &val; | |
5811 | ||
5812 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); | |
5813 | ||
5814 | if (write) | |
5815 | ret = addrconf_fixup_linkdown(ctl, valp, val); | |
5816 | if (ret) | |
5817 | *ppos = pos; | |
5818 | return ret; | |
5819 | } | |
5820 | ||
cb4a4c69 | 5821 | static int minus_one = -1; |
cb9e684e MŻ |
5822 | static const int one = 1; |
5823 | static const int two_five_five = 255; | |
5824 | ||
607ea7cd | 5825 | static const struct ctl_table addrconf_sysctl[] = { |
5df1f77f KK |
5826 | { |
5827 | .procname = "forwarding", | |
5828 | .data = &ipv6_devconf.forwarding, | |
5829 | .maxlen = sizeof(int), | |
5830 | .mode = 0644, | |
5831 | .proc_handler = addrconf_sysctl_forward, | |
5832 | }, | |
5833 | { | |
5834 | .procname = "hop_limit", | |
5835 | .data = &ipv6_devconf.hop_limit, | |
5836 | .maxlen = sizeof(int), | |
5837 | .mode = 0644, | |
cb9e684e MŻ |
5838 | .proc_handler = proc_dointvec_minmax, |
5839 | .extra1 = (void *)&one, | |
5840 | .extra2 = (void *)&two_five_five, | |
5df1f77f KK |
5841 | }, |
5842 | { | |
5843 | .procname = "mtu", | |
5844 | .data = &ipv6_devconf.mtu6, | |
5845 | .maxlen = sizeof(int), | |
5846 | .mode = 0644, | |
5847 | .proc_handler = addrconf_sysctl_mtu, | |
5848 | }, | |
5849 | { | |
5850 | .procname = "accept_ra", | |
5851 | .data = &ipv6_devconf.accept_ra, | |
5852 | .maxlen = sizeof(int), | |
5853 | .mode = 0644, | |
5854 | .proc_handler = proc_dointvec, | |
5855 | }, | |
5856 | { | |
5857 | .procname = "accept_redirects", | |
5858 | .data = &ipv6_devconf.accept_redirects, | |
5859 | .maxlen = sizeof(int), | |
5860 | .mode = 0644, | |
5861 | .proc_handler = proc_dointvec, | |
5862 | }, | |
5863 | { | |
5864 | .procname = "autoconf", | |
5865 | .data = &ipv6_devconf.autoconf, | |
5866 | .maxlen = sizeof(int), | |
5867 | .mode = 0644, | |
5868 | .proc_handler = proc_dointvec, | |
5869 | }, | |
5870 | { | |
5871 | .procname = "dad_transmits", | |
5872 | .data = &ipv6_devconf.dad_transmits, | |
5873 | .maxlen = sizeof(int), | |
5874 | .mode = 0644, | |
5875 | .proc_handler = proc_dointvec, | |
5876 | }, | |
5877 | { | |
5878 | .procname = "router_solicitations", | |
5879 | .data = &ipv6_devconf.rtr_solicits, | |
5880 | .maxlen = sizeof(int), | |
5881 | .mode = 0644, | |
cb4a4c69 MŻ |
5882 | .proc_handler = proc_dointvec_minmax, |
5883 | .extra1 = &minus_one, | |
5df1f77f KK |
5884 | }, |
5885 | { | |
5886 | .procname = "router_solicitation_interval", | |
5887 | .data = &ipv6_devconf.rtr_solicit_interval, | |
5888 | .maxlen = sizeof(int), | |
5889 | .mode = 0644, | |
5890 | .proc_handler = proc_dointvec_jiffies, | |
5891 | }, | |
bd11f074 MŻ |
5892 | { |
5893 | .procname = "router_solicitation_max_interval", | |
5894 | .data = &ipv6_devconf.rtr_solicit_max_interval, | |
5895 | .maxlen = sizeof(int), | |
5896 | .mode = 0644, | |
5897 | .proc_handler = proc_dointvec_jiffies, | |
5898 | }, | |
5df1f77f KK |
5899 | { |
5900 | .procname = "router_solicitation_delay", | |
5901 | .data = &ipv6_devconf.rtr_solicit_delay, | |
5902 | .maxlen = sizeof(int), | |
5903 | .mode = 0644, | |
5904 | .proc_handler = proc_dointvec_jiffies, | |
5905 | }, | |
5906 | { | |
5907 | .procname = "force_mld_version", | |
5908 | .data = &ipv6_devconf.force_mld_version, | |
5909 | .maxlen = sizeof(int), | |
5910 | .mode = 0644, | |
5911 | .proc_handler = proc_dointvec, | |
5912 | }, | |
5913 | { | |
5914 | .procname = "mldv1_unsolicited_report_interval", | |
5915 | .data = | |
5916 | &ipv6_devconf.mldv1_unsolicited_report_interval, | |
5917 | .maxlen = sizeof(int), | |
5918 | .mode = 0644, | |
5919 | .proc_handler = proc_dointvec_ms_jiffies, | |
5920 | }, | |
5921 | { | |
5922 | .procname = "mldv2_unsolicited_report_interval", | |
5923 | .data = | |
5924 | &ipv6_devconf.mldv2_unsolicited_report_interval, | |
5925 | .maxlen = sizeof(int), | |
5926 | .mode = 0644, | |
5927 | .proc_handler = proc_dointvec_ms_jiffies, | |
5928 | }, | |
5929 | { | |
5930 | .procname = "use_tempaddr", | |
5931 | .data = &ipv6_devconf.use_tempaddr, | |
5932 | .maxlen = sizeof(int), | |
5933 | .mode = 0644, | |
5934 | .proc_handler = proc_dointvec, | |
5935 | }, | |
5936 | { | |
5937 | .procname = "temp_valid_lft", | |
5938 | .data = &ipv6_devconf.temp_valid_lft, | |
5939 | .maxlen = sizeof(int), | |
5940 | .mode = 0644, | |
5941 | .proc_handler = proc_dointvec, | |
5942 | }, | |
5943 | { | |
5944 | .procname = "temp_prefered_lft", | |
5945 | .data = &ipv6_devconf.temp_prefered_lft, | |
5946 | .maxlen = sizeof(int), | |
5947 | .mode = 0644, | |
5948 | .proc_handler = proc_dointvec, | |
5949 | }, | |
5950 | { | |
5951 | .procname = "regen_max_retry", | |
5952 | .data = &ipv6_devconf.regen_max_retry, | |
5953 | .maxlen = sizeof(int), | |
5954 | .mode = 0644, | |
5955 | .proc_handler = proc_dointvec, | |
5956 | }, | |
5957 | { | |
5958 | .procname = "max_desync_factor", | |
5959 | .data = &ipv6_devconf.max_desync_factor, | |
5960 | .maxlen = sizeof(int), | |
5961 | .mode = 0644, | |
5962 | .proc_handler = proc_dointvec, | |
5963 | }, | |
5964 | { | |
5965 | .procname = "max_addresses", | |
5966 | .data = &ipv6_devconf.max_addresses, | |
5967 | .maxlen = sizeof(int), | |
5968 | .mode = 0644, | |
5969 | .proc_handler = proc_dointvec, | |
5970 | }, | |
5971 | { | |
5972 | .procname = "accept_ra_defrtr", | |
5973 | .data = &ipv6_devconf.accept_ra_defrtr, | |
5974 | .maxlen = sizeof(int), | |
5975 | .mode = 0644, | |
5976 | .proc_handler = proc_dointvec, | |
5977 | }, | |
5978 | { | |
5979 | .procname = "accept_ra_min_hop_limit", | |
5980 | .data = &ipv6_devconf.accept_ra_min_hop_limit, | |
5981 | .maxlen = sizeof(int), | |
5982 | .mode = 0644, | |
5983 | .proc_handler = proc_dointvec, | |
5984 | }, | |
5985 | { | |
5986 | .procname = "accept_ra_pinfo", | |
5987 | .data = &ipv6_devconf.accept_ra_pinfo, | |
5988 | .maxlen = sizeof(int), | |
5989 | .mode = 0644, | |
5990 | .proc_handler = proc_dointvec, | |
5991 | }, | |
930d6ff2 | 5992 | #ifdef CONFIG_IPV6_ROUTER_PREF |
5df1f77f KK |
5993 | { |
5994 | .procname = "accept_ra_rtr_pref", | |
5995 | .data = &ipv6_devconf.accept_ra_rtr_pref, | |
5996 | .maxlen = sizeof(int), | |
5997 | .mode = 0644, | |
5998 | .proc_handler = proc_dointvec, | |
5999 | }, | |
6000 | { | |
6001 | .procname = "router_probe_interval", | |
6002 | .data = &ipv6_devconf.rtr_probe_interval, | |
6003 | .maxlen = sizeof(int), | |
6004 | .mode = 0644, | |
6005 | .proc_handler = proc_dointvec_jiffies, | |
6006 | }, | |
fa03ef38 | 6007 | #ifdef CONFIG_IPV6_ROUTE_INFO |
5df1f77f KK |
6008 | { |
6009 | .procname = "accept_ra_rt_info_max_plen", | |
6010 | .data = &ipv6_devconf.accept_ra_rt_info_max_plen, | |
6011 | .maxlen = sizeof(int), | |
6012 | .mode = 0644, | |
6013 | .proc_handler = proc_dointvec, | |
6014 | }, | |
09c884d4 | 6015 | #endif |
930d6ff2 | 6016 | #endif |
5df1f77f KK |
6017 | { |
6018 | .procname = "proxy_ndp", | |
6019 | .data = &ipv6_devconf.proxy_ndp, | |
6020 | .maxlen = sizeof(int), | |
6021 | .mode = 0644, | |
6022 | .proc_handler = addrconf_sysctl_proxy_ndp, | |
6023 | }, | |
6024 | { | |
6025 | .procname = "accept_source_route", | |
6026 | .data = &ipv6_devconf.accept_source_route, | |
6027 | .maxlen = sizeof(int), | |
6028 | .mode = 0644, | |
6029 | .proc_handler = proc_dointvec, | |
6030 | }, | |
95c385b4 | 6031 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
5df1f77f KK |
6032 | { |
6033 | .procname = "optimistic_dad", | |
6034 | .data = &ipv6_devconf.optimistic_dad, | |
6035 | .maxlen = sizeof(int), | |
6036 | .mode = 0644, | |
6037 | .proc_handler = proc_dointvec, | |
6038 | }, | |
6039 | { | |
6040 | .procname = "use_optimistic", | |
6041 | .data = &ipv6_devconf.use_optimistic, | |
6042 | .maxlen = sizeof(int), | |
6043 | .mode = 0644, | |
6044 | .proc_handler = proc_dointvec, | |
6045 | }, | |
7bc570c8 YH |
6046 | #endif |
6047 | #ifdef CONFIG_IPV6_MROUTE | |
5df1f77f KK |
6048 | { |
6049 | .procname = "mc_forwarding", | |
6050 | .data = &ipv6_devconf.mc_forwarding, | |
6051 | .maxlen = sizeof(int), | |
6052 | .mode = 0444, | |
6053 | .proc_handler = proc_dointvec, | |
6054 | }, | |
95c385b4 | 6055 | #endif |
5df1f77f KK |
6056 | { |
6057 | .procname = "disable_ipv6", | |
6058 | .data = &ipv6_devconf.disable_ipv6, | |
6059 | .maxlen = sizeof(int), | |
6060 | .mode = 0644, | |
6061 | .proc_handler = addrconf_sysctl_disable, | |
6062 | }, | |
6063 | { | |
6064 | .procname = "accept_dad", | |
6065 | .data = &ipv6_devconf.accept_dad, | |
6066 | .maxlen = sizeof(int), | |
6067 | .mode = 0644, | |
6068 | .proc_handler = proc_dointvec, | |
6069 | }, | |
6070 | { | |
6071 | .procname = "force_tllao", | |
6072 | .data = &ipv6_devconf.force_tllao, | |
6073 | .maxlen = sizeof(int), | |
6074 | .mode = 0644, | |
6075 | .proc_handler = proc_dointvec | |
6076 | }, | |
6077 | { | |
6078 | .procname = "ndisc_notify", | |
6079 | .data = &ipv6_devconf.ndisc_notify, | |
6080 | .maxlen = sizeof(int), | |
6081 | .mode = 0644, | |
6082 | .proc_handler = proc_dointvec | |
6083 | }, | |
6084 | { | |
6085 | .procname = "suppress_frag_ndisc", | |
6086 | .data = &ipv6_devconf.suppress_frag_ndisc, | |
6087 | .maxlen = sizeof(int), | |
6088 | .mode = 0644, | |
6089 | .proc_handler = proc_dointvec | |
6090 | }, | |
6091 | { | |
6092 | .procname = "accept_ra_from_local", | |
6093 | .data = &ipv6_devconf.accept_ra_from_local, | |
6094 | .maxlen = sizeof(int), | |
6095 | .mode = 0644, | |
6096 | .proc_handler = proc_dointvec, | |
6097 | }, | |
6098 | { | |
6099 | .procname = "accept_ra_mtu", | |
6100 | .data = &ipv6_devconf.accept_ra_mtu, | |
6101 | .maxlen = sizeof(int), | |
6102 | .mode = 0644, | |
6103 | .proc_handler = proc_dointvec, | |
6104 | }, | |
6105 | { | |
6106 | .procname = "stable_secret", | |
6107 | .data = &ipv6_devconf.stable_secret, | |
6108 | .maxlen = IPV6_MAX_STRLEN, | |
6109 | .mode = 0600, | |
6110 | .proc_handler = addrconf_sysctl_stable_secret, | |
6111 | }, | |
6112 | { | |
6113 | .procname = "use_oif_addrs_only", | |
6114 | .data = &ipv6_devconf.use_oif_addrs_only, | |
6115 | .maxlen = sizeof(int), | |
6116 | .mode = 0644, | |
6117 | .proc_handler = proc_dointvec, | |
6118 | }, | |
6119 | { | |
6120 | .procname = "ignore_routes_with_linkdown", | |
6121 | .data = &ipv6_devconf.ignore_routes_with_linkdown, | |
6122 | .maxlen = sizeof(int), | |
6123 | .mode = 0644, | |
6124 | .proc_handler = addrconf_sysctl_ignore_routes_with_linkdown, | |
6125 | }, | |
6126 | { | |
6127 | .procname = "drop_unicast_in_l2_multicast", | |
6128 | .data = &ipv6_devconf.drop_unicast_in_l2_multicast, | |
6129 | .maxlen = sizeof(int), | |
6130 | .mode = 0644, | |
6131 | .proc_handler = proc_dointvec, | |
6132 | }, | |
6133 | { | |
6134 | .procname = "drop_unsolicited_na", | |
6135 | .data = &ipv6_devconf.drop_unsolicited_na, | |
6136 | .maxlen = sizeof(int), | |
6137 | .mode = 0644, | |
6138 | .proc_handler = proc_dointvec, | |
6139 | }, | |
6140 | { | |
6141 | .procname = "keep_addr_on_down", | |
6142 | .data = &ipv6_devconf.keep_addr_on_down, | |
6143 | .maxlen = sizeof(int), | |
6144 | .mode = 0644, | |
6145 | .proc_handler = proc_dointvec, | |
6146 | ||
6147 | }, | |
1ababeba DL |
6148 | { |
6149 | .procname = "seg6_enabled", | |
6150 | .data = &ipv6_devconf.seg6_enabled, | |
6151 | .maxlen = sizeof(int), | |
6152 | .mode = 0644, | |
6153 | .proc_handler = proc_dointvec, | |
6154 | }, | |
bf355b8d DL |
6155 | #ifdef CONFIG_IPV6_SEG6_HMAC |
6156 | { | |
6157 | .procname = "seg6_require_hmac", | |
6158 | .data = &ipv6_devconf.seg6_require_hmac, | |
6159 | .maxlen = sizeof(int), | |
6160 | .mode = 0644, | |
6161 | .proc_handler = proc_dointvec, | |
6162 | }, | |
6163 | #endif | |
adc176c5 EN |
6164 | { |
6165 | .procname = "enhanced_dad", | |
6166 | .data = &ipv6_devconf.enhanced_dad, | |
6167 | .maxlen = sizeof(int), | |
6168 | .mode = 0644, | |
6169 | .proc_handler = proc_dointvec, | |
6170 | }, | |
d35a00b8 FJ |
6171 | { |
6172 | .procname = "addr_gen_mode", | |
6173 | .data = &ipv6_devconf.addr_gen_mode, | |
6174 | .maxlen = sizeof(int), | |
6175 | .mode = 0644, | |
6176 | .proc_handler = addrconf_sysctl_addr_gen_mode, | |
6177 | }, | |
5df1f77f KK |
6178 | { |
6179 | /* sentinel */ | |
6180 | } | |
1da177e4 LT |
6181 | }; |
6182 | ||
bff16c2f | 6183 | static int __addrconf_sysctl_register(struct net *net, char *dev_name, |
f8572d8f | 6184 | struct inet6_dev *idev, struct ipv6_devconf *p) |
1da177e4 | 6185 | { |
29c994e3 | 6186 | int i, ifindex; |
607ea7cd | 6187 | struct ctl_table *table; |
6105e293 | 6188 | char path[sizeof("net/ipv6/conf/") + IFNAMSIZ]; |
1dab6222 | 6189 | |
607ea7cd KK |
6190 | table = kmemdup(addrconf_sysctl, sizeof(addrconf_sysctl), GFP_KERNEL); |
6191 | if (!table) | |
f68635e6 PE |
6192 | goto out; |
6193 | ||
607ea7cd KK |
6194 | for (i = 0; table[i].data; i++) { |
6195 | table[i].data += (char *)p - (char *)&ipv6_devconf; | |
cb9e684e MŻ |
6196 | /* If one of these is already set, then it is not safe to |
6197 | * overwrite either of them: this makes proc_dointvec_minmax | |
6198 | * usable. | |
6199 | */ | |
6200 | if (!table[i].extra1 && !table[i].extra2) { | |
6201 | table[i].extra1 = idev; /* embedded; no ref */ | |
6202 | table[i].extra2 = net; | |
6203 | } | |
1da177e4 | 6204 | } |
1da177e4 | 6205 | |
6105e293 | 6206 | snprintf(path, sizeof(path), "net/ipv6/conf/%s", dev_name); |
1da177e4 | 6207 | |
607ea7cd KK |
6208 | p->sysctl_header = register_net_sysctl(net, path, table); |
6209 | if (!p->sysctl_header) | |
6105e293 | 6210 | goto free; |
f68635e6 | 6211 | |
29c994e3 ND |
6212 | if (!strcmp(dev_name, "all")) |
6213 | ifindex = NETCONFA_IFINDEX_ALL; | |
6214 | else if (!strcmp(dev_name, "default")) | |
6215 | ifindex = NETCONFA_IFINDEX_DEFAULT; | |
6216 | else | |
6217 | ifindex = idev->dev->ifindex; | |
6218 | inet6_netconf_notify_devconf(net, NETCONFA_ALL, ifindex, p); | |
95897312 | 6219 | return 0; |
1da177e4 | 6220 | |
f68635e6 | 6221 | free: |
607ea7cd | 6222 | kfree(table); |
f68635e6 | 6223 | out: |
95897312 | 6224 | return -ENOBUFS; |
1da177e4 LT |
6225 | } |
6226 | ||
408c4768 PE |
6227 | static void __addrconf_sysctl_unregister(struct ipv6_devconf *p) |
6228 | { | |
607ea7cd | 6229 | struct ctl_table *table; |
408c4768 | 6230 | |
607ea7cd | 6231 | if (!p->sysctl_header) |
408c4768 PE |
6232 | return; |
6233 | ||
607ea7cd KK |
6234 | table = p->sysctl_header->ctl_table_arg; |
6235 | unregister_net_sysctl_table(p->sysctl_header); | |
6236 | p->sysctl_header = NULL; | |
6237 | kfree(table); | |
408c4768 PE |
6238 | } |
6239 | ||
a317a2f1 | 6240 | static int addrconf_sysctl_register(struct inet6_dev *idev) |
f52295a9 | 6241 | { |
a317a2f1 WC |
6242 | int err; |
6243 | ||
6244 | if (!sysctl_dev_name_is_allowed(idev->dev->name)) | |
6245 | return -EINVAL; | |
6246 | ||
6247 | err = neigh_sysctl_register(idev->dev, idev->nd_parms, | |
6248 | &ndisc_ifinfo_sysctl_change); | |
6249 | if (err) | |
6250 | return err; | |
6251 | err = __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name, | |
6252 | idev, &idev->cnf); | |
6253 | if (err) | |
6254 | neigh_sysctl_unregister(idev->nd_parms); | |
6255 | ||
6256 | return err; | |
f52295a9 PE |
6257 | } |
6258 | ||
408c4768 | 6259 | static void addrconf_sysctl_unregister(struct inet6_dev *idev) |
1da177e4 | 6260 | { |
408c4768 PE |
6261 | __addrconf_sysctl_unregister(&idev->cnf); |
6262 | neigh_sysctl_unregister(idev->nd_parms); | |
1da177e4 LT |
6263 | } |
6264 | ||
6265 | ||
6266 | #endif | |
6267 | ||
2c8c1e72 | 6268 | static int __net_init addrconf_init_net(struct net *net) |
e0da5a48 | 6269 | { |
a79ca223 | 6270 | int err = -ENOMEM; |
e0da5a48 PE |
6271 | struct ipv6_devconf *all, *dflt; |
6272 | ||
a79ca223 | 6273 | all = kmemdup(&ipv6_devconf, sizeof(ipv6_devconf), GFP_KERNEL); |
63159f29 | 6274 | if (!all) |
a79ca223 | 6275 | goto err_alloc_all; |
e0da5a48 | 6276 | |
a79ca223 | 6277 | dflt = kmemdup(&ipv6_devconf_dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL); |
63159f29 | 6278 | if (!dflt) |
a79ca223 | 6279 | goto err_alloc_dflt; |
e0da5a48 | 6280 | |
a79ca223 HZ |
6281 | /* these will be inherited by all namespaces */ |
6282 | dflt->autoconf = ipv6_defaults.autoconf; | |
6283 | dflt->disable_ipv6 = ipv6_defaults.disable_ipv6; | |
e0da5a48 | 6284 | |
3d1bec99 HFS |
6285 | dflt->stable_secret.initialized = false; |
6286 | all->stable_secret.initialized = false; | |
6287 | ||
e0da5a48 PE |
6288 | net->ipv6.devconf_all = all; |
6289 | net->ipv6.devconf_dflt = dflt; | |
6290 | ||
6291 | #ifdef CONFIG_SYSCTL | |
f8572d8f | 6292 | err = __addrconf_sysctl_register(net, "all", NULL, all); |
e0da5a48 PE |
6293 | if (err < 0) |
6294 | goto err_reg_all; | |
6295 | ||
f8572d8f | 6296 | err = __addrconf_sysctl_register(net, "default", NULL, dflt); |
e0da5a48 PE |
6297 | if (err < 0) |
6298 | goto err_reg_dflt; | |
6299 | #endif | |
6300 | return 0; | |
6301 | ||
6302 | #ifdef CONFIG_SYSCTL | |
6303 | err_reg_dflt: | |
6304 | __addrconf_sysctl_unregister(all); | |
6305 | err_reg_all: | |
6306 | kfree(dflt); | |
6307 | #endif | |
6308 | err_alloc_dflt: | |
6309 | kfree(all); | |
6310 | err_alloc_all: | |
6311 | return err; | |
6312 | } | |
6313 | ||
2c8c1e72 | 6314 | static void __net_exit addrconf_exit_net(struct net *net) |
e0da5a48 PE |
6315 | { |
6316 | #ifdef CONFIG_SYSCTL | |
6317 | __addrconf_sysctl_unregister(net->ipv6.devconf_dflt); | |
6318 | __addrconf_sysctl_unregister(net->ipv6.devconf_all); | |
6319 | #endif | |
73cf0e92 | 6320 | kfree(net->ipv6.devconf_dflt); |
6321 | kfree(net->ipv6.devconf_all); | |
e0da5a48 PE |
6322 | } |
6323 | ||
6324 | static struct pernet_operations addrconf_ops = { | |
6325 | .init = addrconf_init_net, | |
6326 | .exit = addrconf_exit_net, | |
6327 | }; | |
6328 | ||
207895fd | 6329 | static struct rtnl_af_ops inet6_ops __read_mostly = { |
b382b191 TG |
6330 | .family = AF_INET6, |
6331 | .fill_link_af = inet6_fill_link_af, | |
6332 | .get_link_af_size = inet6_get_link_af_size, | |
11b1f828 | 6333 | .validate_link_af = inet6_validate_link_af, |
f53adae4 | 6334 | .set_link_af = inet6_set_link_af, |
b382b191 TG |
6335 | }; |
6336 | ||
1da177e4 LT |
6337 | /* |
6338 | * Init / cleanup code | |
6339 | */ | |
6340 | ||
6341 | int __init addrconf_init(void) | |
6342 | { | |
a317a2f1 | 6343 | struct inet6_dev *idev; |
c2e21293 | 6344 | int i, err; |
2a8cc6c8 | 6345 | |
e21e8467 SH |
6346 | err = ipv6_addr_label_init(); |
6347 | if (err < 0) { | |
f3213831 JP |
6348 | pr_crit("%s: cannot initialize default policy table: %d\n", |
6349 | __func__, err); | |
2cc6d2bf | 6350 | goto out; |
2a8cc6c8 | 6351 | } |
1da177e4 | 6352 | |
2cc6d2bf NH |
6353 | err = register_pernet_subsys(&addrconf_ops); |
6354 | if (err < 0) | |
6355 | goto out_addrlabel; | |
e0da5a48 | 6356 | |
c15b1cca HFS |
6357 | addrconf_wq = create_workqueue("ipv6_addrconf"); |
6358 | if (!addrconf_wq) { | |
6359 | err = -ENOMEM; | |
6360 | goto out_nowq; | |
6361 | } | |
6362 | ||
1da177e4 LT |
6363 | /* The addrconf netdev notifier requires that loopback_dev |
6364 | * has it's ipv6 private information allocated and setup | |
6365 | * before it can bring up and give link-local addresses | |
6366 | * to other devices which are up. | |
6367 | * | |
6368 | * Unfortunately, loopback_dev is not necessarily the first | |
6369 | * entry in the global dev_base list of net devices. In fact, | |
6370 | * it is likely to be the very last entry on that list. | |
6371 | * So this causes the notifier registry below to try and | |
6372 | * give link-local addresses to all devices besides loopback_dev | |
6373 | * first, then loopback_dev, which cases all the non-loopback_dev | |
6374 | * devices to fail to get a link-local address. | |
6375 | * | |
6376 | * So, as a temporary fix, allocate the ipv6 structure for | |
6377 | * loopback_dev first by hand. | |
6378 | * Longer term, all of the dependencies ipv6 has upon the loopback | |
6379 | * device and it being up should be removed. | |
6380 | */ | |
6381 | rtnl_lock(); | |
a317a2f1 | 6382 | idev = ipv6_add_dev(init_net.loopback_dev); |
1da177e4 | 6383 | rtnl_unlock(); |
a317a2f1 WC |
6384 | if (IS_ERR(idev)) { |
6385 | err = PTR_ERR(idev); | |
e0da5a48 | 6386 | goto errlo; |
a317a2f1 | 6387 | } |
1da177e4 | 6388 | |
c2e21293 | 6389 | for (i = 0; i < IN6_ADDR_HSIZE; i++) |
6390 | INIT_HLIST_HEAD(&inet6_addr_lst[i]); | |
6391 | ||
1da177e4 LT |
6392 | register_netdevice_notifier(&ipv6_dev_notf); |
6393 | ||
c15b1cca | 6394 | addrconf_verify(); |
c127ea2c | 6395 | |
3678a9d8 | 6396 | rtnl_af_register(&inet6_ops); |
b382b191 | 6397 | |
c7ac8679 GR |
6398 | err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo, |
6399 | NULL); | |
c127ea2c TG |
6400 | if (err < 0) |
6401 | goto errout; | |
6402 | ||
6403 | /* Only the first call to __rtnl_register can fail */ | |
c7ac8679 GR |
6404 | __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL, NULL); |
6405 | __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL, NULL); | |
6406 | __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, | |
6407 | inet6_dump_ifaddr, NULL); | |
6408 | __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, | |
6409 | inet6_dump_ifmcaddr, NULL); | |
6410 | __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, | |
6411 | inet6_dump_ifacaddr, NULL); | |
76f8f6cb | 6412 | __rtnl_register(PF_INET6, RTM_GETNETCONF, inet6_netconf_get_devconf, |
7a674200 | 6413 | inet6_netconf_dump_devconf, NULL); |
c127ea2c | 6414 | |
2a8cc6c8 YH |
6415 | ipv6_addr_label_rtnl_register(); |
6416 | ||
1da177e4 | 6417 | return 0; |
c127ea2c | 6418 | errout: |
b382b191 | 6419 | rtnl_af_unregister(&inet6_ops); |
c127ea2c | 6420 | unregister_netdevice_notifier(&ipv6_dev_notf); |
e0da5a48 | 6421 | errlo: |
c15b1cca HFS |
6422 | destroy_workqueue(addrconf_wq); |
6423 | out_nowq: | |
e0da5a48 | 6424 | unregister_pernet_subsys(&addrconf_ops); |
2cc6d2bf NH |
6425 | out_addrlabel: |
6426 | ipv6_addr_label_cleanup(); | |
6427 | out: | |
c127ea2c | 6428 | return err; |
1da177e4 LT |
6429 | } |
6430 | ||
09f7709f | 6431 | void addrconf_cleanup(void) |
1da177e4 | 6432 | { |
176c39af | 6433 | struct net_device *dev; |
1da177e4 LT |
6434 | int i; |
6435 | ||
6436 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
e0da5a48 | 6437 | unregister_pernet_subsys(&addrconf_ops); |
2cc6d2bf | 6438 | ipv6_addr_label_cleanup(); |
1da177e4 LT |
6439 | |
6440 | rtnl_lock(); | |
6441 | ||
b382b191 TG |
6442 | __rtnl_af_unregister(&inet6_ops); |
6443 | ||
176c39af DL |
6444 | /* clean dev list */ |
6445 | for_each_netdev(&init_net, dev) { | |
6446 | if (__in6_dev_get(dev) == NULL) | |
6447 | continue; | |
6448 | addrconf_ifdown(dev, 1); | |
6449 | } | |
6450 | addrconf_ifdown(init_net.loopback_dev, 2); | |
6451 | ||
1da177e4 LT |
6452 | /* |
6453 | * Check hash table. | |
6454 | */ | |
5c578aed | 6455 | spin_lock_bh(&addrconf_hash_lock); |
c2e21293 | 6456 | for (i = 0; i < IN6_ADDR_HSIZE; i++) |
6457 | WARN_ON(!hlist_empty(&inet6_addr_lst[i])); | |
5c578aed | 6458 | spin_unlock_bh(&addrconf_hash_lock); |
c15b1cca | 6459 | cancel_delayed_work(&addr_chk_work); |
1da177e4 | 6460 | rtnl_unlock(); |
c15b1cca HFS |
6461 | |
6462 | destroy_workqueue(addrconf_wq); | |
1da177e4 | 6463 | } |