Commit | Line | Data |
---|---|---|
2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * IPv6 Address [auto]configuration | |
4 | * Linux INET6 implementation | |
5 | * | |
6 | * Authors: | |
1ab1457c | 7 | * Pedro Roque <roque@di.fc.ul.pt> |
1da177e4 | 8 | * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> |
1da177e4 LT |
9 | */ |
10 | ||
11 | /* | |
12 | * Changes: | |
13 | * | |
14 | * Janos Farkas : delete timer on ifdown | |
15 | * <chexum@bankinf.banki.hu> | |
16 | * Andi Kleen : kill double kfree on module | |
17 | * unload. | |
18 | * Maciej W. Rozycki : FDDI support | |
19 | * sekiya@USAGI : Don't send too many RS | |
20 | * packets. | |
21 | * yoshfuji@USAGI : Fixed interval between DAD | |
22 | * packets. | |
23 | * YOSHIFUJI Hideaki @USAGI : improved accuracy of | |
24 | * address validation timer. | |
25 | * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041) | |
26 | * support. | |
27 | * Yuji SEKIYA @USAGI : Don't assign a same IPv6 | |
28 | * address on a same interface. | |
29 | * YOSHIFUJI Hideaki @USAGI : ARCnet support | |
30 | * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to | |
31 | * seq_file. | |
b1cacb68 YH |
32 | * YOSHIFUJI Hideaki @USAGI : improved source address |
33 | * selection; consider scope, | |
34 | * status etc. | |
1da177e4 LT |
35 | */ |
36 | ||
f3213831 JP |
37 | #define pr_fmt(fmt) "IPv6: " fmt |
38 | ||
1da177e4 LT |
39 | #include <linux/errno.h> |
40 | #include <linux/types.h> | |
a0bffffc | 41 | #include <linux/kernel.h> |
174cd4b1 | 42 | #include <linux/sched/signal.h> |
1da177e4 LT |
43 | #include <linux/socket.h> |
44 | #include <linux/sockios.h> | |
1da177e4 | 45 | #include <linux/net.h> |
3d1bec99 | 46 | #include <linux/inet.h> |
1da177e4 LT |
47 | #include <linux/in6.h> |
48 | #include <linux/netdevice.h> | |
1823730f | 49 | #include <linux/if_addr.h> |
1da177e4 LT |
50 | #include <linux/if_arp.h> |
51 | #include <linux/if_arcnet.h> | |
52 | #include <linux/if_infiniband.h> | |
53 | #include <linux/route.h> | |
54 | #include <linux/inetdevice.h> | |
55 | #include <linux/init.h> | |
5a0e3ad6 | 56 | #include <linux/slab.h> |
1da177e4 LT |
57 | #ifdef CONFIG_SYSCTL |
58 | #include <linux/sysctl.h> | |
59 | #endif | |
4fc268d2 | 60 | #include <linux/capability.h> |
1da177e4 LT |
61 | #include <linux/delay.h> |
62 | #include <linux/notifier.h> | |
543537bd | 63 | #include <linux/string.h> |
ddbe5032 | 64 | #include <linux/hash.h> |
1da177e4 | 65 | |
457c4cbc | 66 | #include <net/net_namespace.h> |
1da177e4 LT |
67 | #include <net/sock.h> |
68 | #include <net/snmp.h> | |
69 | ||
5241c2d7 | 70 | #include <net/6lowpan.h> |
cb6bf355 | 71 | #include <net/firewire.h> |
1da177e4 LT |
72 | #include <net/ipv6.h> |
73 | #include <net/protocol.h> | |
74 | #include <net/ndisc.h> | |
75 | #include <net/ip6_route.h> | |
76 | #include <net/addrconf.h> | |
77 | #include <net/tcp.h> | |
78 | #include <net/ip.h> | |
5d620266 | 79 | #include <net/netlink.h> |
f24e3d65 | 80 | #include <net/pkt_sched.h> |
ca254490 | 81 | #include <net/l3mdev.h> |
1da177e4 LT |
82 | #include <linux/if_tunnel.h> |
83 | #include <linux/rtnetlink.h> | |
f3a1bfb1 | 84 | #include <linux/netconf.h> |
1da177e4 | 85 | #include <linux/random.h> |
e21e8467 | 86 | #include <linux/uaccess.h> |
7f7d9a6b | 87 | #include <asm/unaligned.h> |
1da177e4 LT |
88 | |
89 | #include <linux/proc_fs.h> | |
90 | #include <linux/seq_file.h> | |
bc3b2d7f | 91 | #include <linux/export.h> |
9ee11f0f | 92 | #include <linux/ioam6.h> |
1da177e4 | 93 | |
1da177e4 | 94 | #define INFINITY_LIFE_TIME 0xFFFFFFFF |
18a31e1e | 95 | |
3d1bec99 HFS |
96 | #define IPV6_MAX_STRLEN \ |
97 | sizeof("ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255") | |
98 | ||
18a31e1e TG |
99 | static inline u32 cstamp_delta(unsigned long cstamp) |
100 | { | |
101 | return (cstamp - INITIAL_JIFFIES) * 100UL / HZ; | |
102 | } | |
1da177e4 | 103 | |
bd11f074 MŻ |
104 | static inline s32 rfc3315_s14_backoff_init(s32 irt) |
105 | { | |
106 | /* multiply 'initial retransmission time' by 0.9 .. 1.1 */ | |
e8a533cb | 107 | u64 tmp = get_random_u32_inclusive(900000, 1100000) * (u64)irt; |
bd11f074 MŻ |
108 | do_div(tmp, 1000000); |
109 | return (s32)tmp; | |
110 | } | |
111 | ||
112 | static inline s32 rfc3315_s14_backoff_update(s32 rt, s32 mrt) | |
113 | { | |
114 | /* multiply 'retransmission timeout' by 1.9 .. 2.1 */ | |
e8a533cb | 115 | u64 tmp = get_random_u32_inclusive(1900000, 2100000) * (u64)rt; |
bd11f074 MŻ |
116 | do_div(tmp, 1000000); |
117 | if ((s32)tmp > mrt) { | |
118 | /* multiply 'maximum retransmission time' by 0.9 .. 1.1 */ | |
e8a533cb | 119 | tmp = get_random_u32_inclusive(900000, 1100000) * (u64)mrt; |
bd11f074 MŻ |
120 | do_div(tmp, 1000000); |
121 | } | |
122 | return (s32)tmp; | |
123 | } | |
124 | ||
1da177e4 | 125 | #ifdef CONFIG_SYSCTL |
a317a2f1 | 126 | static int addrconf_sysctl_register(struct inet6_dev *idev); |
408c4768 PE |
127 | static void addrconf_sysctl_unregister(struct inet6_dev *idev); |
128 | #else | |
a317a2f1 | 129 | static inline int addrconf_sysctl_register(struct inet6_dev *idev) |
408c4768 | 130 | { |
a317a2f1 | 131 | return 0; |
408c4768 PE |
132 | } |
133 | ||
134 | static inline void addrconf_sysctl_unregister(struct inet6_dev *idev) | |
135 | { | |
136 | } | |
1da177e4 LT |
137 | #endif |
138 | ||
969c5464 | 139 | static void ipv6_gen_rnd_iid(struct in6_addr *addr); |
1da177e4 | 140 | |
1b34be74 | 141 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev); |
d9bf82c2 | 142 | static int ipv6_count_addresses(const struct inet6_dev *idev); |
622c81d5 HFS |
143 | static int ipv6_generate_stable_address(struct in6_addr *addr, |
144 | u8 dad_count, | |
145 | const struct inet6_dev *idev); | |
1da177e4 | 146 | |
27c565ae ED |
147 | #define IN6_ADDR_HSIZE_SHIFT 8 |
148 | #define IN6_ADDR_HSIZE (1 << IN6_ADDR_HSIZE_SHIFT) | |
1da177e4 | 149 | |
8805d13f ED |
150 | static void addrconf_verify(struct net *net); |
151 | static void addrconf_verify_rtnl(struct net *net); | |
1da177e4 | 152 | |
c15b1cca | 153 | static struct workqueue_struct *addrconf_wq; |
1da177e4 LT |
154 | |
155 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp); | |
156 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp); | |
157 | ||
93d9b7d7 JP |
158 | static void addrconf_type_change(struct net_device *dev, |
159 | unsigned long event); | |
ae79dbf6 | 160 | static int addrconf_ifdown(struct net_device *dev, bool unregister); |
1da177e4 | 161 | |
8d1c802b | 162 | static struct fib6_info *addrconf_get_prefix_route(const struct in6_addr *pfx, |
21caa662 RK |
163 | int plen, |
164 | const struct net_device *dev, | |
2b2450ca DA |
165 | u32 flags, u32 noflags, |
166 | bool no_gw); | |
21caa662 | 167 | |
cf22f9a2 | 168 | static void addrconf_dad_start(struct inet6_ifaddr *ifp); |
c15b1cca | 169 | static void addrconf_dad_work(struct work_struct *w); |
c76fe2d9 DA |
170 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp, bool bump_id, |
171 | bool send_na); | |
896585d4 | 172 | static void addrconf_dad_run(struct inet6_dev *idev, bool restart); |
e99e88a9 | 173 | static void addrconf_rs_timer(struct timer_list *t); |
1da177e4 LT |
174 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); |
175 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa); | |
176 | ||
1ab1457c | 177 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 | 178 | struct prefix_info *pinfo); |
1da177e4 | 179 | |
888c848e | 180 | static struct ipv6_devconf ipv6_devconf __read_mostly = { |
1da177e4 LT |
181 | .forwarding = 0, |
182 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
183 | .mtu6 = IPV6_MIN_MTU, | |
184 | .accept_ra = 1, | |
185 | .accept_redirects = 1, | |
186 | .autoconf = 1, | |
187 | .force_mld_version = 0, | |
fc4eba58 HFS |
188 | .mldv1_unsolicited_report_interval = 10 * HZ, |
189 | .mldv2_unsolicited_report_interval = HZ, | |
1da177e4 LT |
190 | .dad_transmits = 1, |
191 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
192 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
bd11f074 | 193 | .rtr_solicit_max_interval = RTR_SOLICITATION_MAX_INTERVAL, |
1da177e4 | 194 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, |
67ba4152 | 195 | .use_tempaddr = 0, |
1da177e4 LT |
196 | .temp_valid_lft = TEMP_VALID_LIFETIME, |
197 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
198 | .regen_max_retry = REGEN_MAX_RETRY, | |
199 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
1da177e4 | 200 | .max_addresses = IPV6_MAX_ADDRESSES, |
65f5c7c1 | 201 | .accept_ra_defrtr = 1, |
6b2e04bc | 202 | .ra_defrtr_metric = IP6_RT_PRIO_USER, |
d9333196 | 203 | .accept_ra_from_local = 0, |
8013d1d7 | 204 | .accept_ra_min_hop_limit= 1, |
c4fd30eb | 205 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
206 | #ifdef CONFIG_IPV6_ROUTER_PREF |
207 | .accept_ra_rtr_pref = 1, | |
52e16356 | 208 | .rtr_probe_interval = 60 * HZ, |
09c884d4 | 209 | #ifdef CONFIG_IPV6_ROUTE_INFO |
bbea124b | 210 | .accept_ra_rt_info_min_plen = 0, |
09c884d4 YH |
211 | .accept_ra_rt_info_max_plen = 0, |
212 | #endif | |
930d6ff2 | 213 | #endif |
fbea49e1 | 214 | .proxy_ndp = 0, |
0bcbc926 | 215 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
778d80be | 216 | .disable_ipv6 = 0, |
09400953 | 217 | .accept_dad = 0, |
b800c3b9 | 218 | .suppress_frag_ndisc = 1, |
c2943f14 | 219 | .accept_ra_mtu = 1, |
3d1bec99 HFS |
220 | .stable_secret = { |
221 | .initialized = false, | |
3985e8a3 EK |
222 | }, |
223 | .use_oif_addrs_only = 0, | |
35103d11 | 224 | .ignore_routes_with_linkdown = 0, |
f1705ec1 | 225 | .keep_addr_on_down = 0, |
1ababeba | 226 | .seg6_enabled = 0, |
bf355b8d DL |
227 | #ifdef CONFIG_IPV6_SEG6_HMAC |
228 | .seg6_require_hmac = 0, | |
229 | #endif | |
adc176c5 | 230 | .enhanced_dad = 1, |
d35a00b8 | 231 | .addr_gen_mode = IN6_ADDR_GEN_MODE_EUI64, |
df789fe7 | 232 | .disable_policy = 0, |
8610c7c6 | 233 | .rpl_seg_enabled = 0, |
9ee11f0f JI |
234 | .ioam6_enabled = 0, |
235 | .ioam6_id = IOAM6_DEFAULT_IF_ID, | |
236 | .ioam6_id_wide = IOAM6_DEFAULT_IF_ID_WIDE, | |
18ac597a | 237 | .ndisc_evict_nocarrier = 1, |
1da177e4 LT |
238 | }; |
239 | ||
ab32ea5d | 240 | static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = { |
1da177e4 LT |
241 | .forwarding = 0, |
242 | .hop_limit = IPV6_DEFAULT_HOPLIMIT, | |
243 | .mtu6 = IPV6_MIN_MTU, | |
244 | .accept_ra = 1, | |
245 | .accept_redirects = 1, | |
246 | .autoconf = 1, | |
fc4eba58 HFS |
247 | .force_mld_version = 0, |
248 | .mldv1_unsolicited_report_interval = 10 * HZ, | |
249 | .mldv2_unsolicited_report_interval = HZ, | |
1da177e4 LT |
250 | .dad_transmits = 1, |
251 | .rtr_solicits = MAX_RTR_SOLICITATIONS, | |
252 | .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL, | |
bd11f074 | 253 | .rtr_solicit_max_interval = RTR_SOLICITATION_MAX_INTERVAL, |
1da177e4 | 254 | .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY, |
1da177e4 LT |
255 | .use_tempaddr = 0, |
256 | .temp_valid_lft = TEMP_VALID_LIFETIME, | |
257 | .temp_prefered_lft = TEMP_PREFERRED_LIFETIME, | |
258 | .regen_max_retry = REGEN_MAX_RETRY, | |
259 | .max_desync_factor = MAX_DESYNC_FACTOR, | |
1da177e4 | 260 | .max_addresses = IPV6_MAX_ADDRESSES, |
65f5c7c1 | 261 | .accept_ra_defrtr = 1, |
6b2e04bc | 262 | .ra_defrtr_metric = IP6_RT_PRIO_USER, |
d9333196 | 263 | .accept_ra_from_local = 0, |
8013d1d7 | 264 | .accept_ra_min_hop_limit= 1, |
c4fd30eb | 265 | .accept_ra_pinfo = 1, |
930d6ff2 YH |
266 | #ifdef CONFIG_IPV6_ROUTER_PREF |
267 | .accept_ra_rtr_pref = 1, | |
52e16356 | 268 | .rtr_probe_interval = 60 * HZ, |
09c884d4 | 269 | #ifdef CONFIG_IPV6_ROUTE_INFO |
bbea124b | 270 | .accept_ra_rt_info_min_plen = 0, |
09c884d4 YH |
271 | .accept_ra_rt_info_max_plen = 0, |
272 | #endif | |
930d6ff2 | 273 | #endif |
fbea49e1 | 274 | .proxy_ndp = 0, |
0bcbc926 | 275 | .accept_source_route = 0, /* we do not accept RH0 by default. */ |
778d80be | 276 | .disable_ipv6 = 0, |
1b34be74 | 277 | .accept_dad = 1, |
b800c3b9 | 278 | .suppress_frag_ndisc = 1, |
c2943f14 | 279 | .accept_ra_mtu = 1, |
3d1bec99 HFS |
280 | .stable_secret = { |
281 | .initialized = false, | |
282 | }, | |
3985e8a3 | 283 | .use_oif_addrs_only = 0, |
35103d11 | 284 | .ignore_routes_with_linkdown = 0, |
f1705ec1 | 285 | .keep_addr_on_down = 0, |
1ababeba | 286 | .seg6_enabled = 0, |
bf355b8d DL |
287 | #ifdef CONFIG_IPV6_SEG6_HMAC |
288 | .seg6_require_hmac = 0, | |
289 | #endif | |
adc176c5 | 290 | .enhanced_dad = 1, |
d35a00b8 | 291 | .addr_gen_mode = IN6_ADDR_GEN_MODE_EUI64, |
df789fe7 | 292 | .disable_policy = 0, |
8610c7c6 | 293 | .rpl_seg_enabled = 0, |
9ee11f0f JI |
294 | .ioam6_enabled = 0, |
295 | .ioam6_id = IOAM6_DEFAULT_IF_ID, | |
296 | .ioam6_id_wide = IOAM6_DEFAULT_IF_ID_WIDE, | |
18ac597a | 297 | .ndisc_evict_nocarrier = 1, |
1da177e4 LT |
298 | }; |
299 | ||
1f372c7b MM |
300 | /* Check if link is ready: is it up and is a valid qdisc available */ |
301 | static inline bool addrconf_link_ready(const struct net_device *dev) | |
f24e3d65 | 302 | { |
1f372c7b | 303 | return netif_oper_up(dev) && !qdisc_tx_is_noop(dev); |
f24e3d65 MC |
304 | } |
305 | ||
b7b1bfce | 306 | static void addrconf_del_rs_timer(struct inet6_dev *idev) |
1da177e4 | 307 | { |
b7b1bfce HFS |
308 | if (del_timer(&idev->rs_timer)) |
309 | __in6_dev_put(idev); | |
310 | } | |
311 | ||
c15b1cca | 312 | static void addrconf_del_dad_work(struct inet6_ifaddr *ifp) |
b7b1bfce | 313 | { |
c15b1cca | 314 | if (cancel_delayed_work(&ifp->dad_work)) |
1da177e4 LT |
315 | __in6_ifa_put(ifp); |
316 | } | |
317 | ||
b7b1bfce HFS |
318 | static void addrconf_mod_rs_timer(struct inet6_dev *idev, |
319 | unsigned long when) | |
320 | { | |
321 | if (!timer_pending(&idev->rs_timer)) | |
322 | in6_dev_hold(idev); | |
323 | mod_timer(&idev->rs_timer, jiffies + when); | |
324 | } | |
1da177e4 | 325 | |
c15b1cca HFS |
326 | static void addrconf_mod_dad_work(struct inet6_ifaddr *ifp, |
327 | unsigned long delay) | |
1da177e4 | 328 | { |
f8a894b2 XL |
329 | in6_ifa_hold(ifp); |
330 | if (mod_delayed_work(addrconf_wq, &ifp->dad_work, delay)) | |
331 | in6_ifa_put(ifp); | |
1da177e4 LT |
332 | } |
333 | ||
7f7d9a6b HX |
334 | static int snmp6_alloc_dev(struct inet6_dev *idev) |
335 | { | |
827da44c JS |
336 | int i; |
337 | ||
425b9c7f | 338 | idev->stats.ipv6 = alloc_percpu_gfp(struct ipstats_mib, GFP_KERNEL_ACCOUNT); |
698365fa | 339 | if (!idev->stats.ipv6) |
7f7d9a6b | 340 | goto err_ip; |
827da44c JS |
341 | |
342 | for_each_possible_cpu(i) { | |
343 | struct ipstats_mib *addrconf_stats; | |
698365fa | 344 | addrconf_stats = per_cpu_ptr(idev->stats.ipv6, i); |
827da44c | 345 | u64_stats_init(&addrconf_stats->syncp); |
827da44c JS |
346 | } |
347 | ||
348 | ||
be281e55 ED |
349 | idev->stats.icmpv6dev = kzalloc(sizeof(struct icmpv6_mib_device), |
350 | GFP_KERNEL); | |
351 | if (!idev->stats.icmpv6dev) | |
7f7d9a6b | 352 | goto err_icmp; |
be281e55 | 353 | idev->stats.icmpv6msgdev = kzalloc(sizeof(struct icmpv6msg_mib_device), |
425b9c7f | 354 | GFP_KERNEL_ACCOUNT); |
be281e55 | 355 | if (!idev->stats.icmpv6msgdev) |
14878f75 | 356 | goto err_icmpmsg; |
7f7d9a6b HX |
357 | |
358 | return 0; | |
359 | ||
14878f75 | 360 | err_icmpmsg: |
be281e55 | 361 | kfree(idev->stats.icmpv6dev); |
7f7d9a6b | 362 | err_icmp: |
698365fa | 363 | free_percpu(idev->stats.ipv6); |
7f7d9a6b | 364 | err_ip: |
aaf70ec7 | 365 | return -ENOMEM; |
7f7d9a6b HX |
366 | } |
367 | ||
8e5e8f30 | 368 | static struct inet6_dev *ipv6_add_dev(struct net_device *dev) |
1da177e4 LT |
369 | { |
370 | struct inet6_dev *ndev; | |
a317a2f1 | 371 | int err = -ENOMEM; |
1da177e4 LT |
372 | |
373 | ASSERT_RTNL(); | |
374 | ||
e5f80fcf | 375 | if (dev->mtu < IPV6_MIN_MTU && dev != blackhole_netdev) |
a317a2f1 | 376 | return ERR_PTR(-EINVAL); |
1da177e4 | 377 | |
425b9c7f | 378 | ndev = kzalloc(sizeof(*ndev), GFP_KERNEL_ACCOUNT); |
63159f29 | 379 | if (!ndev) |
a317a2f1 | 380 | return ERR_PTR(err); |
322f74a4 IO |
381 | |
382 | rwlock_init(&ndev->lock); | |
383 | ndev->dev = dev; | |
502a2ffd | 384 | INIT_LIST_HEAD(&ndev->addr_list); |
e99e88a9 | 385 | timer_setup(&ndev->rs_timer, addrconf_rs_timer, 0); |
c346dca1 | 386 | memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf)); |
9b29c696 HFS |
387 | |
388 | if (ndev->cnf.stable_secret.initialized) | |
d35a00b8 | 389 | ndev->cnf.addr_gen_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY; |
9b29c696 | 390 | |
322f74a4 | 391 | ndev->cnf.mtu6 = dev->mtu; |
49b99da2 | 392 | ndev->ra_mtu = 0; |
322f74a4 | 393 | ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); |
63159f29 | 394 | if (!ndev->nd_parms) { |
322f74a4 | 395 | kfree(ndev); |
a317a2f1 | 396 | return ERR_PTR(err); |
322f74a4 | 397 | } |
0187bdfb BH |
398 | if (ndev->cnf.forwarding) |
399 | dev_disable_lro(dev); | |
322f74a4 | 400 | /* We refer to the device */ |
d62607c3 | 401 | netdev_hold(dev, &ndev->dev_tracker, GFP_KERNEL); |
1da177e4 | 402 | |
dd263a8c IS |
403 | if (snmp6_alloc_dev(ndev) < 0) { |
404 | netdev_dbg(dev, "%s: cannot allocate memory for statistics\n", | |
405 | __func__); | |
406 | neigh_parms_release(&nd_tbl, ndev->nd_parms); | |
d62607c3 | 407 | netdev_put(dev, &ndev->dev_tracker); |
dd263a8c IS |
408 | kfree(ndev); |
409 | return ERR_PTR(err); | |
410 | } | |
1da177e4 | 411 | |
dd263a8c | 412 | if (dev != blackhole_netdev) { |
e5f80fcf ED |
413 | if (snmp6_register_dev(ndev) < 0) { |
414 | netdev_dbg(dev, "%s: cannot create /proc/net/dev_snmp6/%s\n", | |
415 | __func__, dev->name); | |
416 | goto err_release; | |
417 | } | |
322f74a4 | 418 | } |
9d6280da | 419 | /* One reference from device. */ |
1be92460 | 420 | refcount_set(&ndev->refcnt, 1); |
1da177e4 | 421 | |
1b34be74 YH |
422 | if (dev->flags & (IFF_NOARP | IFF_LOOPBACK)) |
423 | ndev->cnf.accept_dad = -1; | |
424 | ||
07a93626 | 425 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
b077d7ab | 426 | if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) { |
f3213831 | 427 | pr_info("%s: Disabled Multicast RS\n", dev->name); |
b077d7ab YH |
428 | ndev->cnf.rtr_solicits = 0; |
429 | } | |
430 | #endif | |
431 | ||
372e6c8f | 432 | INIT_LIST_HEAD(&ndev->tempaddr_list); |
76506a98 | 433 | ndev->desync_factor = U32_MAX; |
322f74a4 IO |
434 | if ((dev->flags&IFF_LOOPBACK) || |
435 | dev->type == ARPHRD_TUNNEL || | |
9625ed72 | 436 | dev->type == ARPHRD_TUNNEL6 || |
0be669bb | 437 | dev->type == ARPHRD_SIT || |
0be669bb | 438 | dev->type == ARPHRD_NONE) { |
322f74a4 | 439 | ndev->cnf.use_tempaddr = -1; |
969c5464 | 440 | } |
5d9efa7e | 441 | |
914faa14 | 442 | ndev->token = in6addr_any; |
1da177e4 | 443 | |
1f372c7b | 444 | if (netif_running(dev) && addrconf_link_ready(dev)) |
53aadcc9 HX |
445 | ndev->if_flags |= IF_READY; |
446 | ||
322f74a4 IO |
447 | ipv6_mc_init_dev(ndev); |
448 | ndev->tstamp = jiffies; | |
e5f80fcf ED |
449 | if (dev != blackhole_netdev) { |
450 | err = addrconf_sysctl_register(ndev); | |
451 | if (err) { | |
452 | ipv6_mc_destroy_dev(ndev); | |
453 | snmp6_unregister_dev(ndev); | |
454 | goto err_release; | |
455 | } | |
a317a2f1 | 456 | } |
30c4cf57 | 457 | /* protected by rtnl_lock */ |
cf778b00 | 458 | rcu_assign_pointer(dev->ip6_ptr, ndev); |
d88ae4cc | 459 | |
e5f80fcf ED |
460 | if (dev != blackhole_netdev) { |
461 | /* Join interface-local all-node multicast group */ | |
462 | ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allnodes); | |
2c5e8933 | 463 | |
e5f80fcf ED |
464 | /* Join all-node multicast group */ |
465 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes); | |
d6ddef9e | 466 | |
e5f80fcf ED |
467 | /* Join all-router multicast group if forwarding is set */ |
468 | if (ndev->cnf.forwarding && (dev->flags & IFF_MULTICAST)) | |
469 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); | |
470 | } | |
1da177e4 | 471 | return ndev; |
a317a2f1 WC |
472 | |
473 | err_release: | |
474 | neigh_parms_release(&nd_tbl, ndev->nd_parms); | |
475 | ndev->dead = 1; | |
476 | in6_dev_finish_destroy(ndev); | |
477 | return ERR_PTR(err); | |
1da177e4 LT |
478 | } |
479 | ||
8e5e8f30 | 480 | static struct inet6_dev *ipv6_find_idev(struct net_device *dev) |
1da177e4 LT |
481 | { |
482 | struct inet6_dev *idev; | |
483 | ||
484 | ASSERT_RTNL(); | |
485 | ||
e21e8467 SH |
486 | idev = __in6_dev_get(dev); |
487 | if (!idev) { | |
488 | idev = ipv6_add_dev(dev); | |
a317a2f1 | 489 | if (IS_ERR(idev)) |
db0b99f5 | 490 | return idev; |
1da177e4 | 491 | } |
c5e33bdd | 492 | |
1da177e4 LT |
493 | if (dev->flags&IFF_UP) |
494 | ipv6_mc_up(idev); | |
495 | return idev; | |
496 | } | |
497 | ||
f3a1bfb1 ND |
498 | static int inet6_netconf_msgsize_devconf(int type) |
499 | { | |
500 | int size = NLMSG_ALIGN(sizeof(struct netconfmsg)) | |
501 | + nla_total_size(4); /* NETCONFA_IFINDEX */ | |
136ba622 | 502 | bool all = false; |
f3a1bfb1 | 503 | |
136ba622 ZS |
504 | if (type == NETCONFA_ALL) |
505 | all = true; | |
506 | ||
507 | if (all || type == NETCONFA_FORWARDING) | |
f3a1bfb1 | 508 | size += nla_total_size(4); |
b1afce95 | 509 | #ifdef CONFIG_IPV6_MROUTE |
136ba622 | 510 | if (all || type == NETCONFA_MC_FORWARDING) |
d67b8c61 | 511 | size += nla_total_size(4); |
b1afce95 | 512 | #endif |
136ba622 | 513 | if (all || type == NETCONFA_PROXY_NEIGH) |
c92d5491 | 514 | size += nla_total_size(4); |
f3a1bfb1 | 515 | |
136ba622 | 516 | if (all || type == NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN) |
35103d11 AG |
517 | size += nla_total_size(4); |
518 | ||
f3a1bfb1 ND |
519 | return size; |
520 | } | |
521 | ||
522 | static int inet6_netconf_fill_devconf(struct sk_buff *skb, int ifindex, | |
523 | struct ipv6_devconf *devconf, u32 portid, | |
524 | u32 seq, int event, unsigned int flags, | |
525 | int type) | |
526 | { | |
527 | struct nlmsghdr *nlh; | |
528 | struct netconfmsg *ncm; | |
136ba622 | 529 | bool all = false; |
f3a1bfb1 ND |
530 | |
531 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct netconfmsg), | |
532 | flags); | |
63159f29 | 533 | if (!nlh) |
f3a1bfb1 ND |
534 | return -EMSGSIZE; |
535 | ||
136ba622 ZS |
536 | if (type == NETCONFA_ALL) |
537 | all = true; | |
538 | ||
f3a1bfb1 ND |
539 | ncm = nlmsg_data(nlh); |
540 | ncm->ncm_family = AF_INET6; | |
541 | ||
542 | if (nla_put_s32(skb, NETCONFA_IFINDEX, ifindex) < 0) | |
543 | goto nla_put_failure; | |
544 | ||
23452170 DA |
545 | if (!devconf) |
546 | goto out; | |
547 | ||
136ba622 | 548 | if ((all || type == NETCONFA_FORWARDING) && |
f3a1bfb1 ND |
549 | nla_put_s32(skb, NETCONFA_FORWARDING, devconf->forwarding) < 0) |
550 | goto nla_put_failure; | |
b1afce95 | 551 | #ifdef CONFIG_IPV6_MROUTE |
136ba622 | 552 | if ((all || type == NETCONFA_MC_FORWARDING) && |
d67b8c61 | 553 | nla_put_s32(skb, NETCONFA_MC_FORWARDING, |
145c7a79 | 554 | atomic_read(&devconf->mc_forwarding)) < 0) |
d67b8c61 | 555 | goto nla_put_failure; |
b1afce95 | 556 | #endif |
136ba622 | 557 | if ((all || type == NETCONFA_PROXY_NEIGH) && |
c92d5491 | 558 | nla_put_s32(skb, NETCONFA_PROXY_NEIGH, devconf->proxy_ndp) < 0) |
559 | goto nla_put_failure; | |
560 | ||
136ba622 | 561 | if ((all || type == NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN) && |
35103d11 AG |
562 | nla_put_s32(skb, NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN, |
563 | devconf->ignore_routes_with_linkdown) < 0) | |
564 | goto nla_put_failure; | |
565 | ||
23452170 | 566 | out: |
053c095a JB |
567 | nlmsg_end(skb, nlh); |
568 | return 0; | |
f3a1bfb1 ND |
569 | |
570 | nla_put_failure: | |
571 | nlmsg_cancel(skb, nlh); | |
572 | return -EMSGSIZE; | |
573 | } | |
574 | ||
85b3daad DA |
575 | void inet6_netconf_notify_devconf(struct net *net, int event, int type, |
576 | int ifindex, struct ipv6_devconf *devconf) | |
f3a1bfb1 ND |
577 | { |
578 | struct sk_buff *skb; | |
579 | int err = -ENOBUFS; | |
580 | ||
927265bc | 581 | skb = nlmsg_new(inet6_netconf_msgsize_devconf(type), GFP_KERNEL); |
63159f29 | 582 | if (!skb) |
f3a1bfb1 ND |
583 | goto errout; |
584 | ||
585 | err = inet6_netconf_fill_devconf(skb, ifindex, devconf, 0, 0, | |
85b3daad | 586 | event, 0, type); |
f3a1bfb1 ND |
587 | if (err < 0) { |
588 | /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */ | |
589 | WARN_ON(err == -EMSGSIZE); | |
590 | kfree_skb(skb); | |
591 | goto errout; | |
592 | } | |
927265bc | 593 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_NETCONF, NULL, GFP_KERNEL); |
f3a1bfb1 ND |
594 | return; |
595 | errout: | |
bd779028 | 596 | rtnl_set_sk_err(net, RTNLGRP_IPV6_NETCONF, err); |
f3a1bfb1 ND |
597 | } |
598 | ||
76f8f6cb ND |
599 | static const struct nla_policy devconf_ipv6_policy[NETCONFA_MAX+1] = { |
600 | [NETCONFA_IFINDEX] = { .len = sizeof(int) }, | |
601 | [NETCONFA_FORWARDING] = { .len = sizeof(int) }, | |
c92d5491 | 602 | [NETCONFA_PROXY_NEIGH] = { .len = sizeof(int) }, |
35103d11 | 603 | [NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN] = { .len = sizeof(int) }, |
76f8f6cb ND |
604 | }; |
605 | ||
38d51810 JK |
606 | static int inet6_netconf_valid_get_req(struct sk_buff *skb, |
607 | const struct nlmsghdr *nlh, | |
608 | struct nlattr **tb, | |
609 | struct netlink_ext_ack *extack) | |
610 | { | |
611 | int i, err; | |
612 | ||
613 | if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(struct netconfmsg))) { | |
614 | NL_SET_ERR_MSG_MOD(extack, "Invalid header for netconf get request"); | |
615 | return -EINVAL; | |
616 | } | |
617 | ||
618 | if (!netlink_strict_get_check(skb)) | |
8cb08174 JB |
619 | return nlmsg_parse_deprecated(nlh, sizeof(struct netconfmsg), |
620 | tb, NETCONFA_MAX, | |
621 | devconf_ipv6_policy, extack); | |
38d51810 | 622 | |
8cb08174 JB |
623 | err = nlmsg_parse_deprecated_strict(nlh, sizeof(struct netconfmsg), |
624 | tb, NETCONFA_MAX, | |
625 | devconf_ipv6_policy, extack); | |
38d51810 JK |
626 | if (err) |
627 | return err; | |
628 | ||
629 | for (i = 0; i <= NETCONFA_MAX; i++) { | |
630 | if (!tb[i]) | |
631 | continue; | |
632 | ||
633 | switch (i) { | |
634 | case NETCONFA_IFINDEX: | |
635 | break; | |
636 | default: | |
637 | NL_SET_ERR_MSG_MOD(extack, "Unsupported attribute in netconf get request"); | |
638 | return -EINVAL; | |
639 | } | |
640 | } | |
641 | ||
642 | return 0; | |
643 | } | |
644 | ||
76f8f6cb | 645 | static int inet6_netconf_get_devconf(struct sk_buff *in_skb, |
c21ef3e3 DA |
646 | struct nlmsghdr *nlh, |
647 | struct netlink_ext_ack *extack) | |
76f8f6cb ND |
648 | { |
649 | struct net *net = sock_net(in_skb->sk); | |
650 | struct nlattr *tb[NETCONFA_MAX+1]; | |
4ea2607f FW |
651 | struct inet6_dev *in6_dev = NULL; |
652 | struct net_device *dev = NULL; | |
76f8f6cb ND |
653 | struct sk_buff *skb; |
654 | struct ipv6_devconf *devconf; | |
76f8f6cb ND |
655 | int ifindex; |
656 | int err; | |
657 | ||
38d51810 | 658 | err = inet6_netconf_valid_get_req(in_skb, nlh, tb, extack); |
76f8f6cb | 659 | if (err < 0) |
4ea2607f | 660 | return err; |
76f8f6cb | 661 | |
76f8f6cb | 662 | if (!tb[NETCONFA_IFINDEX]) |
4ea2607f | 663 | return -EINVAL; |
76f8f6cb | 664 | |
4ea2607f | 665 | err = -EINVAL; |
76f8f6cb ND |
666 | ifindex = nla_get_s32(tb[NETCONFA_IFINDEX]); |
667 | switch (ifindex) { | |
668 | case NETCONFA_IFINDEX_ALL: | |
669 | devconf = net->ipv6.devconf_all; | |
670 | break; | |
671 | case NETCONFA_IFINDEX_DEFAULT: | |
672 | devconf = net->ipv6.devconf_dflt; | |
673 | break; | |
674 | default: | |
4ea2607f | 675 | dev = dev_get_by_index(net, ifindex); |
63159f29 | 676 | if (!dev) |
4ea2607f FW |
677 | return -EINVAL; |
678 | in6_dev = in6_dev_get(dev); | |
63159f29 | 679 | if (!in6_dev) |
76f8f6cb ND |
680 | goto errout; |
681 | devconf = &in6_dev->cnf; | |
682 | break; | |
683 | } | |
684 | ||
685 | err = -ENOBUFS; | |
4ea2607f | 686 | skb = nlmsg_new(inet6_netconf_msgsize_devconf(NETCONFA_ALL), GFP_KERNEL); |
63159f29 | 687 | if (!skb) |
76f8f6cb ND |
688 | goto errout; |
689 | ||
690 | err = inet6_netconf_fill_devconf(skb, ifindex, devconf, | |
691 | NETLINK_CB(in_skb).portid, | |
692 | nlh->nlmsg_seq, RTM_NEWNETCONF, 0, | |
136ba622 | 693 | NETCONFA_ALL); |
76f8f6cb ND |
694 | if (err < 0) { |
695 | /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */ | |
696 | WARN_ON(err == -EMSGSIZE); | |
697 | kfree_skb(skb); | |
698 | goto errout; | |
699 | } | |
700 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); | |
701 | errout: | |
4ea2607f FW |
702 | if (in6_dev) |
703 | in6_dev_put(in6_dev); | |
1160dfa1 | 704 | dev_put(dev); |
76f8f6cb ND |
705 | return err; |
706 | } | |
707 | ||
7a674200 ND |
708 | static int inet6_netconf_dump_devconf(struct sk_buff *skb, |
709 | struct netlink_callback *cb) | |
710 | { | |
addd383f | 711 | const struct nlmsghdr *nlh = cb->nlh; |
7a674200 ND |
712 | struct net *net = sock_net(skb->sk); |
713 | int h, s_h; | |
714 | int idx, s_idx; | |
715 | struct net_device *dev; | |
716 | struct inet6_dev *idev; | |
717 | struct hlist_head *head; | |
718 | ||
addd383f DA |
719 | if (cb->strict_check) { |
720 | struct netlink_ext_ack *extack = cb->extack; | |
721 | struct netconfmsg *ncm; | |
722 | ||
723 | if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ncm))) { | |
724 | NL_SET_ERR_MSG_MOD(extack, "Invalid header for netconf dump request"); | |
725 | return -EINVAL; | |
726 | } | |
727 | ||
728 | if (nlmsg_attrlen(nlh, sizeof(*ncm))) { | |
729 | NL_SET_ERR_MSG_MOD(extack, "Invalid data after header in netconf dump request"); | |
730 | return -EINVAL; | |
731 | } | |
732 | } | |
733 | ||
7a674200 ND |
734 | s_h = cb->args[0]; |
735 | s_idx = idx = cb->args[1]; | |
736 | ||
737 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
738 | idx = 0; | |
739 | head = &net->dev_index_head[h]; | |
740 | rcu_read_lock(); | |
63998ac2 ND |
741 | cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^ |
742 | net->dev_base_seq; | |
7a674200 ND |
743 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
744 | if (idx < s_idx) | |
745 | goto cont; | |
746 | idev = __in6_dev_get(dev); | |
747 | if (!idev) | |
748 | goto cont; | |
749 | ||
750 | if (inet6_netconf_fill_devconf(skb, dev->ifindex, | |
751 | &idev->cnf, | |
752 | NETLINK_CB(cb->skb).portid, | |
addd383f | 753 | nlh->nlmsg_seq, |
7a674200 ND |
754 | RTM_NEWNETCONF, |
755 | NLM_F_MULTI, | |
136ba622 | 756 | NETCONFA_ALL) < 0) { |
7a674200 ND |
757 | rcu_read_unlock(); |
758 | goto done; | |
759 | } | |
63998ac2 | 760 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
7a674200 ND |
761 | cont: |
762 | idx++; | |
763 | } | |
764 | rcu_read_unlock(); | |
765 | } | |
766 | if (h == NETDEV_HASHENTRIES) { | |
767 | if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_ALL, | |
768 | net->ipv6.devconf_all, | |
769 | NETLINK_CB(cb->skb).portid, | |
addd383f | 770 | nlh->nlmsg_seq, |
7a674200 | 771 | RTM_NEWNETCONF, NLM_F_MULTI, |
136ba622 | 772 | NETCONFA_ALL) < 0) |
7a674200 ND |
773 | goto done; |
774 | else | |
775 | h++; | |
776 | } | |
777 | if (h == NETDEV_HASHENTRIES + 1) { | |
778 | if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_DEFAULT, | |
779 | net->ipv6.devconf_dflt, | |
780 | NETLINK_CB(cb->skb).portid, | |
addd383f | 781 | nlh->nlmsg_seq, |
7a674200 | 782 | RTM_NEWNETCONF, NLM_F_MULTI, |
136ba622 | 783 | NETCONFA_ALL) < 0) |
7a674200 ND |
784 | goto done; |
785 | else | |
786 | h++; | |
787 | } | |
788 | done: | |
789 | cb->args[0] = h; | |
790 | cb->args[1] = idx; | |
791 | ||
792 | return skb->len; | |
793 | } | |
794 | ||
1da177e4 LT |
795 | #ifdef CONFIG_SYSCTL |
796 | static void dev_forward_change(struct inet6_dev *idev) | |
797 | { | |
798 | struct net_device *dev; | |
799 | struct inet6_ifaddr *ifa; | |
51454ea4 | 800 | LIST_HEAD(tmp_addr_list); |
1da177e4 LT |
801 | |
802 | if (!idev) | |
803 | return; | |
804 | dev = idev->dev; | |
0187bdfb BH |
805 | if (idev->cnf.forwarding) |
806 | dev_disable_lro(dev); | |
1a940835 | 807 | if (dev->flags & IFF_MULTICAST) { |
2c5e8933 | 808 | if (idev->cnf.forwarding) { |
f3ee4010 | 809 | ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); |
2c5e8933 HFS |
810 | ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allrouters); |
811 | ipv6_dev_mc_inc(dev, &in6addr_sitelocal_allrouters); | |
812 | } else { | |
f3ee4010 | 813 | ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters); |
2c5e8933 HFS |
814 | ipv6_dev_mc_dec(dev, &in6addr_interfacelocal_allrouters); |
815 | ipv6_dev_mc_dec(dev, &in6addr_sitelocal_allrouters); | |
816 | } | |
1da177e4 | 817 | } |
502a2ffd | 818 | |
51454ea4 | 819 | read_lock_bh(&idev->lock); |
502a2ffd | 820 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
2c12a74c MW |
821 | if (ifa->flags&IFA_F_TENTATIVE) |
822 | continue; | |
51454ea4 ND |
823 | list_add_tail(&ifa->if_list_aux, &tmp_addr_list); |
824 | } | |
825 | read_unlock_bh(&idev->lock); | |
826 | ||
827 | while (!list_empty(&tmp_addr_list)) { | |
828 | ifa = list_first_entry(&tmp_addr_list, | |
829 | struct inet6_ifaddr, if_list_aux); | |
830 | list_del(&ifa->if_list_aux); | |
1da177e4 LT |
831 | if (idev->cnf.forwarding) |
832 | addrconf_join_anycast(ifa); | |
833 | else | |
834 | addrconf_leave_anycast(ifa); | |
835 | } | |
51454ea4 | 836 | |
85b3daad DA |
837 | inet6_netconf_notify_devconf(dev_net(dev), RTM_NEWNETCONF, |
838 | NETCONFA_FORWARDING, | |
f3a1bfb1 | 839 | dev->ifindex, &idev->cnf); |
1da177e4 LT |
840 | } |
841 | ||
842 | ||
e186932b | 843 | static void addrconf_forward_change(struct net *net, __s32 newf) |
1da177e4 LT |
844 | { |
845 | struct net_device *dev; | |
846 | struct inet6_dev *idev; | |
847 | ||
4acd4945 | 848 | for_each_netdev(net, dev) { |
1da177e4 LT |
849 | idev = __in6_dev_get(dev); |
850 | if (idev) { | |
e186932b PE |
851 | int changed = (!idev->cnf.forwarding) ^ (!newf); |
852 | idev->cnf.forwarding = newf; | |
1da177e4 LT |
853 | if (changed) |
854 | dev_forward_change(idev); | |
855 | } | |
1da177e4 | 856 | } |
1da177e4 | 857 | } |
c8fecf22 | 858 | |
013d97e9 | 859 | static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int newf) |
c8fecf22 | 860 | { |
bff16c2f | 861 | struct net *net; |
013d97e9 FR |
862 | int old; |
863 | ||
864 | if (!rtnl_trylock()) | |
865 | return restart_syscall(); | |
bff16c2f PE |
866 | |
867 | net = (struct net *)table->extra2; | |
013d97e9 FR |
868 | old = *p; |
869 | *p = newf; | |
b325fddb | 870 | |
013d97e9 | 871 | if (p == &net->ipv6.devconf_dflt->forwarding) { |
f3a1bfb1 | 872 | if ((!newf) ^ (!old)) |
85b3daad DA |
873 | inet6_netconf_notify_devconf(net, RTM_NEWNETCONF, |
874 | NETCONFA_FORWARDING, | |
f3a1bfb1 ND |
875 | NETCONFA_IFINDEX_DEFAULT, |
876 | net->ipv6.devconf_dflt); | |
013d97e9 FR |
877 | rtnl_unlock(); |
878 | return 0; | |
88af182e | 879 | } |
c8fecf22 | 880 | |
e186932b | 881 | if (p == &net->ipv6.devconf_all->forwarding) { |
d26c638c ND |
882 | int old_dflt = net->ipv6.devconf_dflt->forwarding; |
883 | ||
e186932b | 884 | net->ipv6.devconf_dflt->forwarding = newf; |
d26c638c | 885 | if ((!newf) ^ (!old_dflt)) |
85b3daad DA |
886 | inet6_netconf_notify_devconf(net, RTM_NEWNETCONF, |
887 | NETCONFA_FORWARDING, | |
d26c638c ND |
888 | NETCONFA_IFINDEX_DEFAULT, |
889 | net->ipv6.devconf_dflt); | |
890 | ||
e186932b | 891 | addrconf_forward_change(net, newf); |
f3a1bfb1 | 892 | if ((!newf) ^ (!old)) |
85b3daad DA |
893 | inet6_netconf_notify_devconf(net, RTM_NEWNETCONF, |
894 | NETCONFA_FORWARDING, | |
f3a1bfb1 ND |
895 | NETCONFA_IFINDEX_ALL, |
896 | net->ipv6.devconf_all); | |
013d97e9 | 897 | } else if ((!newf) ^ (!old)) |
c8fecf22 | 898 | dev_forward_change((struct inet6_dev *)table->extra1); |
0187bdfb | 899 | rtnl_unlock(); |
c8fecf22 | 900 | |
013d97e9 | 901 | if (newf) |
7b4da532 | 902 | rt6_purge_dflt_routers(net); |
b325fddb | 903 | return 1; |
c8fecf22 | 904 | } |
35103d11 AG |
905 | |
906 | static void addrconf_linkdown_change(struct net *net, __s32 newf) | |
907 | { | |
908 | struct net_device *dev; | |
909 | struct inet6_dev *idev; | |
910 | ||
911 | for_each_netdev(net, dev) { | |
912 | idev = __in6_dev_get(dev); | |
913 | if (idev) { | |
914 | int changed = (!idev->cnf.ignore_routes_with_linkdown) ^ (!newf); | |
915 | ||
916 | idev->cnf.ignore_routes_with_linkdown = newf; | |
917 | if (changed) | |
918 | inet6_netconf_notify_devconf(dev_net(dev), | |
85b3daad | 919 | RTM_NEWNETCONF, |
35103d11 AG |
920 | NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN, |
921 | dev->ifindex, | |
922 | &idev->cnf); | |
923 | } | |
924 | } | |
925 | } | |
926 | ||
927 | static int addrconf_fixup_linkdown(struct ctl_table *table, int *p, int newf) | |
928 | { | |
929 | struct net *net; | |
930 | int old; | |
931 | ||
932 | if (!rtnl_trylock()) | |
933 | return restart_syscall(); | |
934 | ||
935 | net = (struct net *)table->extra2; | |
936 | old = *p; | |
937 | *p = newf; | |
938 | ||
939 | if (p == &net->ipv6.devconf_dflt->ignore_routes_with_linkdown) { | |
940 | if ((!newf) ^ (!old)) | |
941 | inet6_netconf_notify_devconf(net, | |
85b3daad | 942 | RTM_NEWNETCONF, |
35103d11 AG |
943 | NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN, |
944 | NETCONFA_IFINDEX_DEFAULT, | |
945 | net->ipv6.devconf_dflt); | |
946 | rtnl_unlock(); | |
947 | return 0; | |
948 | } | |
949 | ||
950 | if (p == &net->ipv6.devconf_all->ignore_routes_with_linkdown) { | |
951 | net->ipv6.devconf_dflt->ignore_routes_with_linkdown = newf; | |
952 | addrconf_linkdown_change(net, newf); | |
953 | if ((!newf) ^ (!old)) | |
954 | inet6_netconf_notify_devconf(net, | |
85b3daad | 955 | RTM_NEWNETCONF, |
35103d11 AG |
956 | NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN, |
957 | NETCONFA_IFINDEX_ALL, | |
958 | net->ipv6.devconf_all); | |
959 | } | |
960 | rtnl_unlock(); | |
961 | ||
962 | return 1; | |
963 | } | |
964 | ||
1da177e4 LT |
965 | #endif |
966 | ||
5c578aed | 967 | /* Nobody refers to this ifaddr, destroy it */ |
1da177e4 LT |
968 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) |
969 | { | |
c2e21293 | 970 | WARN_ON(!hlist_unhashed(&ifp->addr_lst)); |
547b792c | 971 | |
1da177e4 | 972 | #ifdef NET_REFCNT_DEBUG |
91df42be | 973 | pr_debug("%s\n", __func__); |
1da177e4 LT |
974 | #endif |
975 | ||
976 | in6_dev_put(ifp->idev); | |
977 | ||
c15b1cca HFS |
978 | if (cancel_delayed_work(&ifp->dad_work)) |
979 | pr_notice("delayed DAD work was pending while freeing ifa=%p\n", | |
980 | ifp); | |
1da177e4 | 981 | |
e9d3e084 | 982 | if (ifp->state != INET6_IFADDR_STATE_DEAD) { |
f3213831 | 983 | pr_warn("Freeing alive inet6 address %p\n", ifp); |
1da177e4 LT |
984 | return; |
985 | } | |
1da177e4 | 986 | |
e5785985 | 987 | kfree_rcu(ifp, rcu); |
1da177e4 LT |
988 | } |
989 | ||
e55ffac6 BH |
990 | static void |
991 | ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp) | |
992 | { | |
502a2ffd | 993 | struct list_head *p; |
8a6ce0c0 | 994 | int ifp_scope = ipv6_addr_src_scope(&ifp->addr); |
e55ffac6 BH |
995 | |
996 | /* | |
997 | * Each device address list is sorted in order of scope - | |
998 | * global before linklocal. | |
999 | */ | |
502a2ffd | 1000 | list_for_each(p, &idev->addr_list) { |
1001 | struct inet6_ifaddr *ifa | |
1002 | = list_entry(p, struct inet6_ifaddr, if_list); | |
8a6ce0c0 | 1003 | if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr)) |
e55ffac6 BH |
1004 | break; |
1005 | } | |
1006 | ||
8ef802aa | 1007 | list_add_tail_rcu(&ifp->if_list, p); |
e55ffac6 BH |
1008 | } |
1009 | ||
3f27fb23 | 1010 | static u32 inet6_addr_hash(const struct net *net, const struct in6_addr *addr) |
3eb84f49 | 1011 | { |
3f27fb23 ED |
1012 | u32 val = ipv6_addr_hash(addr) ^ net_hash_mix(net); |
1013 | ||
1014 | return hash_32(val, IN6_ADDR_HSIZE_SHIFT); | |
3eb84f49 YH |
1015 | } |
1016 | ||
56fc709b | 1017 | static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr, |
752a9292 | 1018 | struct net_device *dev, unsigned int hash) |
56fc709b | 1019 | { |
56fc709b ED |
1020 | struct inet6_ifaddr *ifp; |
1021 | ||
e66d1172 | 1022 | hlist_for_each_entry(ifp, &net->ipv6.inet6_addr_lst[hash], addr_lst) { |
56fc709b ED |
1023 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
1024 | if (!dev || ifp->idev->dev == dev) | |
1025 | return true; | |
1026 | } | |
1027 | } | |
1028 | return false; | |
1029 | } | |
1030 | ||
f3d9832e DA |
1031 | static int ipv6_add_addr_hash(struct net_device *dev, struct inet6_ifaddr *ifa) |
1032 | { | |
e66d1172 ED |
1033 | struct net *net = dev_net(dev); |
1034 | unsigned int hash = inet6_addr_hash(net, &ifa->addr); | |
f3d9832e DA |
1035 | int err = 0; |
1036 | ||
09eed119 | 1037 | spin_lock_bh(&net->ipv6.addrconf_hash_lock); |
f3d9832e DA |
1038 | |
1039 | /* Ignore adding duplicate addresses on an interface */ | |
e66d1172 | 1040 | if (ipv6_chk_same_addr(net, &ifa->addr, dev, hash)) { |
e32ac250 | 1041 | netdev_dbg(dev, "ipv6_add_addr: already assigned\n"); |
f3d9832e | 1042 | err = -EEXIST; |
752a9292 | 1043 | } else { |
e66d1172 | 1044 | hlist_add_head_rcu(&ifa->addr_lst, &net->ipv6.inet6_addr_lst[hash]); |
f3d9832e DA |
1045 | } |
1046 | ||
09eed119 | 1047 | spin_unlock_bh(&net->ipv6.addrconf_hash_lock); |
f3d9832e DA |
1048 | |
1049 | return err; | |
1050 | } | |
1051 | ||
1da177e4 LT |
1052 | /* On success it returns ifp with increased reference count */ |
1053 | ||
1054 | static struct inet6_ifaddr * | |
e6464b8c | 1055 | ipv6_add_addr(struct inet6_dev *idev, struct ifa6_config *cfg, |
de95e047 | 1056 | bool can_block, struct netlink_ext_ack *extack) |
1da177e4 | 1057 | { |
f3d9832e | 1058 | gfp_t gfp_flags = can_block ? GFP_KERNEL : GFP_ATOMIC; |
e6464b8c | 1059 | int addr_type = ipv6_addr_type(cfg->pfx); |
df789fe7 | 1060 | struct net *net = dev_net(idev->dev); |
1da177e4 | 1061 | struct inet6_ifaddr *ifa = NULL; |
360a9887 | 1062 | struct fib6_info *f6i = NULL; |
1da177e4 | 1063 | int err = 0; |
d68b8270 YH |
1064 | |
1065 | if (addr_type == IPV6_ADDR_ANY || | |
f17f7648 HL |
1066 | (addr_type & IPV6_ADDR_MULTICAST && |
1067 | !(cfg->ifa_flags & IFA_F_MCAUTOJOIN)) || | |
d68b8270 | 1068 | (!(idev->dev->flags & IFF_LOOPBACK) && |
3ede0bbc | 1069 | !netif_is_l3_master(idev->dev) && |
d68b8270 YH |
1070 | addr_type & IPV6_ADDR_LOOPBACK)) |
1071 | return ERR_PTR(-EADDRNOTAVAIL); | |
1da177e4 | 1072 | |
1da177e4 LT |
1073 | if (idev->dead) { |
1074 | err = -ENODEV; /*XXX*/ | |
f3d9832e | 1075 | goto out; |
1da177e4 LT |
1076 | } |
1077 | ||
56d417b1 | 1078 | if (idev->cnf.disable_ipv6) { |
9bdd8d40 | 1079 | err = -EACCES; |
f3d9832e | 1080 | goto out; |
9bdd8d40 BH |
1081 | } |
1082 | ||
ff7883ea DA |
1083 | /* validator notifier needs to be blocking; |
1084 | * do not call in atomic context | |
1085 | */ | |
1086 | if (can_block) { | |
1087 | struct in6_validator_info i6vi = { | |
e6464b8c | 1088 | .i6vi_addr = *cfg->pfx, |
ff7883ea | 1089 | .i6vi_dev = idev, |
de95e047 | 1090 | .extack = extack, |
ff7883ea DA |
1091 | }; |
1092 | ||
1093 | err = inet6addr_validator_notifier_call_chain(NETDEV_UP, &i6vi); | |
1094 | err = notifier_to_errno(err); | |
1095 | if (err < 0) | |
1096 | goto out; | |
1097 | } | |
1da177e4 | 1098 | |
6126891c | 1099 | ifa = kzalloc(sizeof(*ifa), gfp_flags | __GFP_ACCOUNT); |
63159f29 | 1100 | if (!ifa) { |
1da177e4 LT |
1101 | err = -ENOBUFS; |
1102 | goto out; | |
1103 | } | |
1104 | ||
e6464b8c | 1105 | f6i = addrconf_f6i_alloc(net, idev, cfg->pfx, false, gfp_flags); |
360a9887 DA |
1106 | if (IS_ERR(f6i)) { |
1107 | err = PTR_ERR(f6i); | |
1108 | f6i = NULL; | |
1da177e4 LT |
1109 | goto out; |
1110 | } | |
1111 | ||
bba24896 JP |
1112 | neigh_parms_data_state_setall(idev->nd_parms); |
1113 | ||
e6464b8c DA |
1114 | ifa->addr = *cfg->pfx; |
1115 | if (cfg->peer_pfx) | |
1116 | ifa->peer_addr = *cfg->peer_pfx; | |
1da177e4 LT |
1117 | |
1118 | spin_lock_init(&ifa->lock); | |
c15b1cca | 1119 | INIT_DELAYED_WORK(&ifa->dad_work, addrconf_dad_work); |
c2e21293 | 1120 | INIT_HLIST_NODE(&ifa->addr_lst); |
e6464b8c DA |
1121 | ifa->scope = cfg->scope; |
1122 | ifa->prefix_len = cfg->plen; | |
8308f3ff | 1123 | ifa->rt_priority = cfg->rt_priority; |
e6464b8c | 1124 | ifa->flags = cfg->ifa_flags; |
47f0bd50 | 1125 | ifa->ifa_proto = cfg->ifa_proto; |
66eb9f86 | 1126 | /* No need to add the TENTATIVE flag for addresses with NODAD */ |
e6464b8c | 1127 | if (!(cfg->ifa_flags & IFA_F_NODAD)) |
66eb9f86 | 1128 | ifa->flags |= IFA_F_TENTATIVE; |
e6464b8c DA |
1129 | ifa->valid_lft = cfg->valid_lft; |
1130 | ifa->prefered_lft = cfg->preferred_lft; | |
1da177e4 | 1131 | ifa->cstamp = ifa->tstamp = jiffies; |
617fe29d | 1132 | ifa->tokenized = false; |
1da177e4 | 1133 | |
360a9887 | 1134 | ifa->rt = f6i; |
57f5f544 | 1135 | |
1da177e4 | 1136 | ifa->idev = idev; |
f3d9832e DA |
1137 | in6_dev_hold(idev); |
1138 | ||
1da177e4 | 1139 | /* For caller */ |
271201c0 | 1140 | refcount_set(&ifa->refcnt, 1); |
1da177e4 | 1141 | |
09eed119 | 1142 | rcu_read_lock(); |
1da177e4 | 1143 | |
f3d9832e DA |
1144 | err = ipv6_add_addr_hash(idev->dev, ifa); |
1145 | if (err < 0) { | |
09eed119 | 1146 | rcu_read_unlock(); |
f3d9832e DA |
1147 | goto out; |
1148 | } | |
1da177e4 | 1149 | |
09eed119 | 1150 | write_lock_bh(&idev->lock); |
f3d9832e | 1151 | |
1da177e4 | 1152 | /* Add to inet6_dev unicast addr list. */ |
e55ffac6 | 1153 | ipv6_link_dev_addr(idev, ifa); |
1da177e4 | 1154 | |
1da177e4 | 1155 | if (ifa->flags&IFA_F_TEMPORARY) { |
372e6c8f | 1156 | list_add(&ifa->tmp_list, &idev->tempaddr_list); |
1da177e4 LT |
1157 | in6_ifa_hold(ifa); |
1158 | } | |
1da177e4 | 1159 | |
1da177e4 | 1160 | in6_ifa_hold(ifa); |
09eed119 | 1161 | write_unlock_bh(&idev->lock); |
f3d9832e | 1162 | |
09eed119 | 1163 | rcu_read_unlock(); |
1da177e4 | 1164 | |
f3d9832e DA |
1165 | inet6addr_notifier_call_chain(NETDEV_UP, ifa); |
1166 | out: | |
1167 | if (unlikely(err < 0)) { | |
360a9887 | 1168 | fib6_info_release(f6i); |
93531c67 | 1169 | |
f3d9832e DA |
1170 | if (ifa) { |
1171 | if (ifa->idev) | |
1172 | in6_dev_put(ifa->idev); | |
1173 | kfree(ifa); | |
1174 | } | |
1da177e4 LT |
1175 | ifa = ERR_PTR(err); |
1176 | } | |
1177 | ||
1178 | return ifa; | |
1da177e4 LT |
1179 | } |
1180 | ||
5b84efec TH |
1181 | enum cleanup_prefix_rt_t { |
1182 | CLEANUP_PREFIX_RT_NOP, /* no cleanup action for prefix route */ | |
1183 | CLEANUP_PREFIX_RT_DEL, /* delete the prefix route */ | |
1184 | CLEANUP_PREFIX_RT_EXPIRE, /* update the lifetime of the prefix route */ | |
1185 | }; | |
1186 | ||
1187 | /* | |
1188 | * Check, whether the prefix for ifp would still need a prefix route | |
1189 | * after deleting ifp. The function returns one of the CLEANUP_PREFIX_RT_* | |
1190 | * constants. | |
1191 | * | |
1192 | * 1) we don't purge prefix if address was not permanent. | |
1193 | * prefix is managed by its own lifetime. | |
1194 | * 2) we also don't purge, if the address was IFA_F_NOPREFIXROUTE. | |
1195 | * 3) if there are no addresses, delete prefix. | |
1196 | * 4) if there are still other permanent address(es), | |
1197 | * corresponding prefix is still permanent. | |
1198 | * 5) if there are still other addresses with IFA_F_NOPREFIXROUTE, | |
1199 | * don't purge the prefix, assume user space is managing it. | |
1200 | * 6) otherwise, update prefix lifetime to the | |
1201 | * longest valid lifetime among the corresponding | |
1202 | * addresses on the device. | |
1203 | * Note: subsequent RA will update lifetime. | |
1204 | **/ | |
1205 | static enum cleanup_prefix_rt_t | |
1206 | check_cleanup_prefix_route(struct inet6_ifaddr *ifp, unsigned long *expires) | |
1207 | { | |
1208 | struct inet6_ifaddr *ifa; | |
1209 | struct inet6_dev *idev = ifp->idev; | |
1210 | unsigned long lifetime; | |
1211 | enum cleanup_prefix_rt_t action = CLEANUP_PREFIX_RT_DEL; | |
1212 | ||
1213 | *expires = jiffies; | |
1214 | ||
1215 | list_for_each_entry(ifa, &idev->addr_list, if_list) { | |
1216 | if (ifa == ifp) | |
1217 | continue; | |
e75913c9 ZL |
1218 | if (ifa->prefix_len != ifp->prefix_len || |
1219 | !ipv6_prefix_equal(&ifa->addr, &ifp->addr, | |
5b84efec TH |
1220 | ifp->prefix_len)) |
1221 | continue; | |
1222 | if (ifa->flags & (IFA_F_PERMANENT | IFA_F_NOPREFIXROUTE)) | |
1223 | return CLEANUP_PREFIX_RT_NOP; | |
1224 | ||
1225 | action = CLEANUP_PREFIX_RT_EXPIRE; | |
1226 | ||
1227 | spin_lock(&ifa->lock); | |
1228 | ||
1229 | lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ); | |
1230 | /* | |
1231 | * Note: Because this address is | |
1232 | * not permanent, lifetime < | |
1233 | * LONG_MAX / HZ here. | |
1234 | */ | |
1235 | if (time_before(*expires, ifa->tstamp + lifetime * HZ)) | |
1236 | *expires = ifa->tstamp + lifetime * HZ; | |
1237 | spin_unlock(&ifa->lock); | |
1238 | } | |
1239 | ||
1240 | return action; | |
1241 | } | |
1242 | ||
1243 | static void | |
d0098e4c HL |
1244 | cleanup_prefix_route(struct inet6_ifaddr *ifp, unsigned long expires, |
1245 | bool del_rt, bool del_peer) | |
5b84efec | 1246 | { |
93c2fb25 | 1247 | struct fib6_info *f6i; |
5b84efec | 1248 | |
d0098e4c HL |
1249 | f6i = addrconf_get_prefix_route(del_peer ? &ifp->peer_addr : &ifp->addr, |
1250 | ifp->prefix_len, | |
2b2450ca | 1251 | ifp->idev->dev, 0, RTF_DEFAULT, true); |
93c2fb25 | 1252 | if (f6i) { |
5b84efec | 1253 | if (del_rt) |
11dd74b3 | 1254 | ip6_del_rt(dev_net(ifp->idev->dev), f6i, false); |
5b84efec | 1255 | else { |
93c2fb25 DA |
1256 | if (!(f6i->fib6_flags & RTF_EXPIRES)) |
1257 | fib6_set_expires(f6i, expires); | |
1258 | fib6_info_release(f6i); | |
5b84efec TH |
1259 | } |
1260 | } | |
1261 | } | |
1262 | ||
1263 | ||
1da177e4 LT |
1264 | /* This function wants to get referenced ifp and releases it before return */ |
1265 | ||
1266 | static void ipv6_del_addr(struct inet6_ifaddr *ifp) | |
1267 | { | |
5b84efec | 1268 | enum cleanup_prefix_rt_t action = CLEANUP_PREFIX_RT_NOP; |
e66d1172 | 1269 | struct net *net = dev_net(ifp->idev->dev); |
5b84efec | 1270 | unsigned long expires; |
e66d1172 | 1271 | int state; |
1da177e4 | 1272 | |
c15b1cca HFS |
1273 | ASSERT_RTNL(); |
1274 | ||
8e8e676d | 1275 | spin_lock_bh(&ifp->lock); |
4c5ff6a6 | 1276 | state = ifp->state; |
e9d3e084 | 1277 | ifp->state = INET6_IFADDR_STATE_DEAD; |
8e8e676d | 1278 | spin_unlock_bh(&ifp->lock); |
4c5ff6a6 HX |
1279 | |
1280 | if (state == INET6_IFADDR_STATE_DEAD) | |
1281 | goto out; | |
1da177e4 | 1282 | |
e66d1172 | 1283 | spin_lock_bh(&net->ipv6.addrconf_hash_lock); |
5c578aed | 1284 | hlist_del_init_rcu(&ifp->addr_lst); |
e66d1172 | 1285 | spin_unlock_bh(&net->ipv6.addrconf_hash_lock); |
1da177e4 | 1286 | |
5b84efec | 1287 | write_lock_bh(&ifp->idev->lock); |
5d9efa7e | 1288 | |
1da177e4 | 1289 | if (ifp->flags&IFA_F_TEMPORARY) { |
372e6c8f | 1290 | list_del(&ifp->tmp_list); |
1291 | if (ifp->ifpub) { | |
1292 | in6_ifa_put(ifp->ifpub); | |
1293 | ifp->ifpub = NULL; | |
1da177e4 | 1294 | } |
372e6c8f | 1295 | __in6_ifa_put(ifp); |
1da177e4 | 1296 | } |
1da177e4 | 1297 | |
5b84efec TH |
1298 | if (ifp->flags & IFA_F_PERMANENT && !(ifp->flags & IFA_F_NOPREFIXROUTE)) |
1299 | action = check_cleanup_prefix_route(ifp, &expires); | |
502a2ffd | 1300 | |
8ef802aa | 1301 | list_del_rcu(&ifp->if_list); |
5b84efec TH |
1302 | __in6_ifa_put(ifp); |
1303 | ||
1304 | write_unlock_bh(&ifp->idev->lock); | |
1da177e4 | 1305 | |
c15b1cca | 1306 | addrconf_del_dad_work(ifp); |
b2238566 | 1307 | |
1da177e4 LT |
1308 | ipv6_ifa_notify(RTM_DELADDR, ifp); |
1309 | ||
f88c91dd | 1310 | inet6addr_notifier_call_chain(NETDEV_DOWN, ifp); |
1da177e4 | 1311 | |
5b84efec TH |
1312 | if (action != CLEANUP_PREFIX_RT_NOP) { |
1313 | cleanup_prefix_route(ifp, expires, | |
d0098e4c | 1314 | action == CLEANUP_PREFIX_RT_DEL, false); |
1da177e4 LT |
1315 | } |
1316 | ||
c3968a85 DW |
1317 | /* clean up prefsrc entries */ |
1318 | rt6_remove_prefsrc(ifp); | |
4c5ff6a6 | 1319 | out: |
1da177e4 LT |
1320 | in6_ifa_put(ifp); |
1321 | } | |
1322 | ||
969c5464 | 1323 | static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, bool block) |
1da177e4 LT |
1324 | { |
1325 | struct inet6_dev *idev = ifp->idev; | |
e6464b8c | 1326 | unsigned long tmp_tstamp, age; |
eac55bf9 | 1327 | unsigned long regen_advance; |
76f793e3 | 1328 | unsigned long now = jiffies; |
7aa8e63f | 1329 | s32 cnf_temp_preferred_lft; |
969c5464 FG |
1330 | struct inet6_ifaddr *ift; |
1331 | struct ifa6_config cfg; | |
1332 | long max_desync_factor; | |
1333 | struct in6_addr addr; | |
1334 | int ret = 0; | |
1da177e4 | 1335 | |
53bd6749 | 1336 | write_lock_bh(&idev->lock); |
969c5464 | 1337 | |
1da177e4 LT |
1338 | retry: |
1339 | in6_dev_hold(idev); | |
1340 | if (idev->cnf.use_tempaddr <= 0) { | |
53bd6749 | 1341 | write_unlock_bh(&idev->lock); |
f3213831 | 1342 | pr_info("%s: use_tempaddr is disabled\n", __func__); |
1da177e4 LT |
1343 | in6_dev_put(idev); |
1344 | ret = -1; | |
1345 | goto out; | |
1346 | } | |
1347 | spin_lock_bh(&ifp->lock); | |
1348 | if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { | |
1349 | idev->cnf.use_tempaddr = -1; /*XXX*/ | |
1350 | spin_unlock_bh(&ifp->lock); | |
53bd6749 | 1351 | write_unlock_bh(&idev->lock); |
f3213831 JP |
1352 | pr_warn("%s: regeneration time exceeded - disabled temporary address support\n", |
1353 | __func__); | |
1da177e4 LT |
1354 | in6_dev_put(idev); |
1355 | ret = -1; | |
1356 | goto out; | |
1357 | } | |
1358 | in6_ifa_hold(ifp); | |
1359 | memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); | |
969c5464 FG |
1360 | ipv6_gen_rnd_iid(&addr); |
1361 | ||
76f793e3 | 1362 | age = (now - ifp->tstamp) / HZ; |
76506a98 JB |
1363 | |
1364 | regen_advance = idev->cnf.regen_max_retry * | |
1365 | idev->cnf.dad_transmits * | |
19e16d22 | 1366 | max(NEIGH_VAR(idev->nd_parms, RETRANS_TIME), HZ/100) / HZ; |
76506a98 JB |
1367 | |
1368 | /* recalculate max_desync_factor each time and update | |
1369 | * idev->desync_factor if it's larger | |
1370 | */ | |
7aa8e63f | 1371 | cnf_temp_preferred_lft = READ_ONCE(idev->cnf.temp_prefered_lft); |
76506a98 JB |
1372 | max_desync_factor = min_t(__u32, |
1373 | idev->cnf.max_desync_factor, | |
7aa8e63f | 1374 | cnf_temp_preferred_lft - regen_advance); |
76506a98 JB |
1375 | |
1376 | if (unlikely(idev->desync_factor > max_desync_factor)) { | |
1377 | if (max_desync_factor > 0) { | |
1378 | get_random_bytes(&idev->desync_factor, | |
1379 | sizeof(idev->desync_factor)); | |
1380 | idev->desync_factor %= max_desync_factor; | |
1381 | } else { | |
1382 | idev->desync_factor = 0; | |
1383 | } | |
1384 | } | |
1385 | ||
3f2d67b6 | 1386 | memset(&cfg, 0, sizeof(cfg)); |
e6464b8c | 1387 | cfg.valid_lft = min_t(__u32, ifp->valid_lft, |
7a876b0e | 1388 | idev->cnf.temp_valid_lft + age); |
e6464b8c DA |
1389 | cfg.preferred_lft = cnf_temp_preferred_lft + age - idev->desync_factor; |
1390 | cfg.preferred_lft = min_t(__u32, ifp->prefered_lft, cfg.preferred_lft); | |
1391 | ||
1392 | cfg.plen = ifp->prefix_len; | |
1da177e4 LT |
1393 | tmp_tstamp = ifp->tstamp; |
1394 | spin_unlock_bh(&ifp->lock); | |
1395 | ||
53bd6749 | 1396 | write_unlock_bh(&idev->lock); |
95c385b4 | 1397 | |
eac55bf9 BB |
1398 | /* A temporary address is created only if this calculated Preferred |
1399 | * Lifetime is greater than REGEN_ADVANCE time units. In particular, | |
1400 | * an implementation must not create a temporary address with a zero | |
1401 | * Preferred Lifetime. | |
ecab6701 HK |
1402 | * Use age calculation as in addrconf_verify to avoid unnecessary |
1403 | * temporary addresses being generated. | |
eac55bf9 | 1404 | */ |
ecab6701 | 1405 | age = (now - tmp_tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ; |
e6464b8c | 1406 | if (cfg.preferred_lft <= regen_advance + age) { |
eac55bf9 BB |
1407 | in6_ifa_put(ifp); |
1408 | in6_dev_put(idev); | |
1409 | ret = -1; | |
1410 | goto out; | |
1411 | } | |
1412 | ||
e6464b8c | 1413 | cfg.ifa_flags = IFA_F_TEMPORARY; |
95c385b4 NH |
1414 | /* set in addrconf_prefix_rcv() */ |
1415 | if (ifp->flags & IFA_F_OPTIMISTIC) | |
e6464b8c | 1416 | cfg.ifa_flags |= IFA_F_OPTIMISTIC; |
95c385b4 | 1417 | |
e6464b8c DA |
1418 | cfg.pfx = &addr; |
1419 | cfg.scope = ipv6_addr_scope(cfg.pfx); | |
95c385b4 | 1420 | |
e6464b8c | 1421 | ift = ipv6_add_addr(idev, &cfg, block, NULL); |
4b08a8f1 | 1422 | if (IS_ERR(ift)) { |
1da177e4 LT |
1423 | in6_ifa_put(ifp); |
1424 | in6_dev_put(idev); | |
f3213831 | 1425 | pr_info("%s: retry temporary address regeneration\n", __func__); |
53bd6749 | 1426 | write_lock_bh(&idev->lock); |
1da177e4 LT |
1427 | goto retry; |
1428 | } | |
1429 | ||
1430 | spin_lock_bh(&ift->lock); | |
1431 | ift->ifpub = ifp; | |
76f793e3 | 1432 | ift->cstamp = now; |
1da177e4 LT |
1433 | ift->tstamp = tmp_tstamp; |
1434 | spin_unlock_bh(&ift->lock); | |
1435 | ||
cf22f9a2 | 1436 | addrconf_dad_start(ift); |
1da177e4 LT |
1437 | in6_ifa_put(ift); |
1438 | in6_dev_put(idev); | |
1439 | out: | |
1440 | return ret; | |
1441 | } | |
1da177e4 LT |
1442 | |
1443 | /* | |
072047e4 | 1444 | * Choose an appropriate source address (RFC3484) |
1da177e4 | 1445 | */ |
a9b05723 YH |
1446 | enum { |
1447 | IPV6_SADDR_RULE_INIT = 0, | |
1448 | IPV6_SADDR_RULE_LOCAL, | |
1449 | IPV6_SADDR_RULE_SCOPE, | |
1450 | IPV6_SADDR_RULE_PREFERRED, | |
1451 | #ifdef CONFIG_IPV6_MIP6 | |
1452 | IPV6_SADDR_RULE_HOA, | |
1453 | #endif | |
1454 | IPV6_SADDR_RULE_OIF, | |
1455 | IPV6_SADDR_RULE_LABEL, | |
a9b05723 | 1456 | IPV6_SADDR_RULE_PRIVACY, |
a9b05723 YH |
1457 | IPV6_SADDR_RULE_ORCHID, |
1458 | IPV6_SADDR_RULE_PREFIX, | |
7fd2561e EK |
1459 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
1460 | IPV6_SADDR_RULE_NOT_OPTIMISTIC, | |
1461 | #endif | |
a9b05723 YH |
1462 | IPV6_SADDR_RULE_MAX |
1463 | }; | |
1464 | ||
072047e4 | 1465 | struct ipv6_saddr_score { |
a9b05723 YH |
1466 | int rule; |
1467 | int addr_type; | |
1468 | struct inet6_ifaddr *ifa; | |
1469 | DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX); | |
1470 | int scopedist; | |
1471 | int matchlen; | |
072047e4 YH |
1472 | }; |
1473 | ||
a9b05723 | 1474 | struct ipv6_saddr_dst { |
9acd9f3a | 1475 | const struct in6_addr *addr; |
a9b05723 YH |
1476 | int ifindex; |
1477 | int scope; | |
1478 | int label; | |
7cbca67c | 1479 | unsigned int prefs; |
a9b05723 | 1480 | }; |
072047e4 | 1481 | |
b6f99a21 | 1482 | static inline int ipv6_saddr_preferred(int type) |
1da177e4 | 1483 | { |
45bb0060 | 1484 | if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|IPV6_ADDR_LOOPBACK)) |
072047e4 YH |
1485 | return 1; |
1486 | return 0; | |
1da177e4 LT |
1487 | } |
1488 | ||
35e015e1 MC |
1489 | static bool ipv6_use_optimistic_addr(struct net *net, |
1490 | struct inet6_dev *idev) | |
7fd2561e EK |
1491 | { |
1492 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
35e015e1 MC |
1493 | if (!idev) |
1494 | return false; | |
1495 | if (!net->ipv6.devconf_all->optimistic_dad && !idev->cnf.optimistic_dad) | |
1496 | return false; | |
1497 | if (!net->ipv6.devconf_all->use_optimistic && !idev->cnf.use_optimistic) | |
1498 | return false; | |
1499 | ||
1500 | return true; | |
7fd2561e EK |
1501 | #else |
1502 | return false; | |
1503 | #endif | |
1504 | } | |
1505 | ||
f1c02cfb SD |
1506 | static bool ipv6_allow_optimistic_dad(struct net *net, |
1507 | struct inet6_dev *idev) | |
1508 | { | |
1509 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
1510 | if (!idev) | |
1511 | return false; | |
1512 | if (!net->ipv6.devconf_all->optimistic_dad && !idev->cnf.optimistic_dad) | |
1513 | return false; | |
1514 | ||
1515 | return true; | |
1516 | #else | |
1517 | return false; | |
1518 | #endif | |
1519 | } | |
1520 | ||
3de23255 BT |
1521 | static int ipv6_get_saddr_eval(struct net *net, |
1522 | struct ipv6_saddr_score *score, | |
a9b05723 YH |
1523 | struct ipv6_saddr_dst *dst, |
1524 | int i) | |
1525 | { | |
1526 | int ret; | |
1527 | ||
1528 | if (i <= score->rule) { | |
1529 | switch (i) { | |
1530 | case IPV6_SADDR_RULE_SCOPE: | |
1531 | ret = score->scopedist; | |
1532 | break; | |
1533 | case IPV6_SADDR_RULE_PREFIX: | |
1534 | ret = score->matchlen; | |
1535 | break; | |
1536 | default: | |
1537 | ret = !!test_bit(i, score->scorebits); | |
1538 | } | |
1539 | goto out; | |
1540 | } | |
1541 | ||
1542 | switch (i) { | |
1543 | case IPV6_SADDR_RULE_INIT: | |
1544 | /* Rule 0: remember if hiscore is not ready yet */ | |
1545 | ret = !!score->ifa; | |
1546 | break; | |
1547 | case IPV6_SADDR_RULE_LOCAL: | |
1548 | /* Rule 1: Prefer same address */ | |
1549 | ret = ipv6_addr_equal(&score->ifa->addr, dst->addr); | |
1550 | break; | |
1551 | case IPV6_SADDR_RULE_SCOPE: | |
1552 | /* Rule 2: Prefer appropriate scope | |
1553 | * | |
1554 | * ret | |
1555 | * ^ | |
1556 | * -1 | d 15 | |
1557 | * ---+--+-+---> scope | |
1558 | * | | |
1559 | * | d is scope of the destination. | |
1560 | * B-d | \ | |
1561 | * | \ <- smaller scope is better if | |
db9c7c39 | 1562 | * B-15 | \ if scope is enough for destination. |
a9b05723 YH |
1563 | * | ret = B - scope (-1 <= scope >= d <= 15). |
1564 | * d-C-1 | / | |
1565 | * |/ <- greater is better | |
1566 | * -C / if scope is not enough for destination. | |
1567 | * /| ret = scope - C (-1 <= d < scope <= 15). | |
1568 | * | |
1569 | * d - C - 1 < B -15 (for all -1 <= d <= 15). | |
1570 | * C > d + 14 - B >= 15 + 14 - B = 29 - B. | |
1571 | * Assume B = 0 and we get C > 29. | |
1572 | */ | |
1573 | ret = __ipv6_addr_src_scope(score->addr_type); | |
1574 | if (ret >= dst->scope) | |
1575 | ret = -ret; | |
1576 | else | |
1577 | ret -= 128; /* 30 is enough */ | |
1578 | score->scopedist = ret; | |
1579 | break; | |
1580 | case IPV6_SADDR_RULE_PREFERRED: | |
7fd2561e | 1581 | { |
a9b05723 | 1582 | /* Rule 3: Avoid deprecated and optimistic addresses */ |
7fd2561e EK |
1583 | u8 avoid = IFA_F_DEPRECATED; |
1584 | ||
35e015e1 | 1585 | if (!ipv6_use_optimistic_addr(net, score->ifa->idev)) |
7fd2561e | 1586 | avoid |= IFA_F_OPTIMISTIC; |
a9b05723 | 1587 | ret = ipv6_saddr_preferred(score->addr_type) || |
7fd2561e | 1588 | !(score->ifa->flags & avoid); |
a9b05723 | 1589 | break; |
7fd2561e | 1590 | } |
a9b05723 YH |
1591 | #ifdef CONFIG_IPV6_MIP6 |
1592 | case IPV6_SADDR_RULE_HOA: | |
7cbca67c | 1593 | { |
a9b05723 | 1594 | /* Rule 4: Prefer home address */ |
7cbca67c YH |
1595 | int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA); |
1596 | ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome; | |
a9b05723 | 1597 | break; |
7cbca67c | 1598 | } |
a9b05723 YH |
1599 | #endif |
1600 | case IPV6_SADDR_RULE_OIF: | |
1601 | /* Rule 5: Prefer outgoing interface */ | |
1602 | ret = (!dst->ifindex || | |
1603 | dst->ifindex == score->ifa->idev->dev->ifindex); | |
1604 | break; | |
1605 | case IPV6_SADDR_RULE_LABEL: | |
1606 | /* Rule 6: Prefer matching label */ | |
3de23255 BT |
1607 | ret = ipv6_addr_label(net, |
1608 | &score->ifa->addr, score->addr_type, | |
a9b05723 YH |
1609 | score->ifa->idev->dev->ifindex) == dst->label; |
1610 | break; | |
a9b05723 | 1611 | case IPV6_SADDR_RULE_PRIVACY: |
7cbca67c | 1612 | { |
a9b05723 | 1613 | /* Rule 7: Prefer public address |
25985edc | 1614 | * Note: prefer temporary address if use_tempaddr >= 2 |
a9b05723 | 1615 | */ |
7cbca67c YH |
1616 | int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ? |
1617 | !!(dst->prefs & IPV6_PREFER_SRC_TMP) : | |
1618 | score->ifa->idev->cnf.use_tempaddr >= 2; | |
1619 | ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp; | |
a9b05723 | 1620 | break; |
7cbca67c | 1621 | } |
a9b05723 YH |
1622 | case IPV6_SADDR_RULE_ORCHID: |
1623 | /* Rule 8-: Prefer ORCHID vs ORCHID or | |
1624 | * non-ORCHID vs non-ORCHID | |
1625 | */ | |
1626 | ret = !(ipv6_addr_orchid(&score->ifa->addr) ^ | |
1627 | ipv6_addr_orchid(dst->addr)); | |
1628 | break; | |
1629 | case IPV6_SADDR_RULE_PREFIX: | |
1630 | /* Rule 8: Use longest matching prefix */ | |
91b4b04f YH |
1631 | ret = ipv6_addr_diff(&score->ifa->addr, dst->addr); |
1632 | if (ret > score->ifa->prefix_len) | |
1633 | ret = score->ifa->prefix_len; | |
1634 | score->matchlen = ret; | |
a9b05723 | 1635 | break; |
7fd2561e EK |
1636 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
1637 | case IPV6_SADDR_RULE_NOT_OPTIMISTIC: | |
1638 | /* Optimistic addresses still have lower precedence than other | |
1639 | * preferred addresses. | |
1640 | */ | |
1641 | ret = !(score->ifa->flags & IFA_F_OPTIMISTIC); | |
1642 | break; | |
1643 | #endif | |
a9b05723 YH |
1644 | default: |
1645 | ret = 0; | |
1646 | } | |
1647 | ||
1648 | if (ret) | |
1649 | __set_bit(i, score->scorebits); | |
1650 | score->rule = i; | |
1651 | out: | |
1652 | return ret; | |
1653 | } | |
1654 | ||
c0b8da1e YH |
1655 | static int __ipv6_dev_get_saddr(struct net *net, |
1656 | struct ipv6_saddr_dst *dst, | |
c0b8da1e YH |
1657 | struct inet6_dev *idev, |
1658 | struct ipv6_saddr_score *scores, | |
1659 | int hiscore_idx) | |
9131f3de | 1660 | { |
c0b8da1e | 1661 | struct ipv6_saddr_score *score = &scores[1 - hiscore_idx], *hiscore = &scores[hiscore_idx]; |
9131f3de | 1662 | |
f59c031e | 1663 | list_for_each_entry_rcu(score->ifa, &idev->addr_list, if_list) { |
9131f3de YH |
1664 | int i; |
1665 | ||
1666 | /* | |
1667 | * - Tentative Address (RFC2462 section 5.4) | |
1668 | * - A tentative address is not considered | |
1669 | * "assigned to an interface" in the traditional | |
1670 | * sense, unless it is also flagged as optimistic. | |
1671 | * - Candidate Source Address (section 4) | |
1672 | * - In any case, anycast addresses, multicast | |
1673 | * addresses, and the unspecified address MUST | |
1674 | * NOT be included in a candidate set. | |
1675 | */ | |
1676 | if ((score->ifa->flags & IFA_F_TENTATIVE) && | |
1677 | (!(score->ifa->flags & IFA_F_OPTIMISTIC))) | |
1678 | continue; | |
1679 | ||
1680 | score->addr_type = __ipv6_addr_type(&score->ifa->addr); | |
1681 | ||
1682 | if (unlikely(score->addr_type == IPV6_ADDR_ANY || | |
1683 | score->addr_type & IPV6_ADDR_MULTICAST)) { | |
1684 | net_dbg_ratelimited("ADDRCONF: unspecified / multicast address assigned as unicast address on %s", | |
1685 | idev->dev->name); | |
1686 | continue; | |
1687 | } | |
1688 | ||
1689 | score->rule = -1; | |
1690 | bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX); | |
1691 | ||
1692 | for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) { | |
1693 | int minihiscore, miniscore; | |
1694 | ||
1695 | minihiscore = ipv6_get_saddr_eval(net, hiscore, dst, i); | |
1696 | miniscore = ipv6_get_saddr_eval(net, score, dst, i); | |
1697 | ||
1698 | if (minihiscore > miniscore) { | |
1699 | if (i == IPV6_SADDR_RULE_SCOPE && | |
1700 | score->scopedist > 0) { | |
1701 | /* | |
1702 | * special case: | |
1703 | * each remaining entry | |
1704 | * has too small (not enough) | |
1705 | * scope, because ifa entries | |
1706 | * are sorted by their scope | |
1707 | * values. | |
1708 | */ | |
1709 | goto out; | |
1710 | } | |
1711 | break; | |
1712 | } else if (minihiscore < miniscore) { | |
9131f3de | 1713 | swap(hiscore, score); |
c0b8da1e | 1714 | hiscore_idx = 1 - hiscore_idx; |
9131f3de YH |
1715 | |
1716 | /* restore our iterator */ | |
1717 | score->ifa = hiscore->ifa; | |
1718 | ||
1719 | break; | |
1720 | } | |
1721 | } | |
1722 | } | |
1723 | out: | |
c0b8da1e | 1724 | return hiscore_idx; |
9131f3de YH |
1725 | } |
1726 | ||
afbac601 DA |
1727 | static int ipv6_get_saddr_master(struct net *net, |
1728 | const struct net_device *dst_dev, | |
1729 | const struct net_device *master, | |
1730 | struct ipv6_saddr_dst *dst, | |
1731 | struct ipv6_saddr_score *scores, | |
1732 | int hiscore_idx) | |
1733 | { | |
1734 | struct inet6_dev *idev; | |
1735 | ||
1736 | idev = __in6_dev_get(dst_dev); | |
1737 | if (idev) | |
1738 | hiscore_idx = __ipv6_dev_get_saddr(net, dst, idev, | |
1739 | scores, hiscore_idx); | |
1740 | ||
1741 | idev = __in6_dev_get(master); | |
1742 | if (idev) | |
1743 | hiscore_idx = __ipv6_dev_get_saddr(net, dst, idev, | |
1744 | scores, hiscore_idx); | |
1745 | ||
1746 | return hiscore_idx; | |
1747 | } | |
1748 | ||
b3f644fc | 1749 | int ipv6_dev_get_saddr(struct net *net, const struct net_device *dst_dev, |
9acd9f3a | 1750 | const struct in6_addr *daddr, unsigned int prefs, |
7cbca67c | 1751 | struct in6_addr *saddr) |
1da177e4 | 1752 | { |
c0b8da1e | 1753 | struct ipv6_saddr_score scores[2], *hiscore; |
a9b05723 | 1754 | struct ipv6_saddr_dst dst; |
9131f3de | 1755 | struct inet6_dev *idev; |
072047e4 | 1756 | struct net_device *dev; |
a9b05723 | 1757 | int dst_type; |
9131f3de | 1758 | bool use_oif_addr = false; |
c0b8da1e | 1759 | int hiscore_idx = 0; |
cc429c8f | 1760 | int ret = 0; |
1da177e4 | 1761 | |
a9b05723 YH |
1762 | dst_type = __ipv6_addr_type(daddr); |
1763 | dst.addr = daddr; | |
1764 | dst.ifindex = dst_dev ? dst_dev->ifindex : 0; | |
1765 | dst.scope = __ipv6_addr_src_scope(dst_type); | |
3de23255 | 1766 | dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex); |
7cbca67c | 1767 | dst.prefs = prefs; |
a9b05723 | 1768 | |
c0b8da1e YH |
1769 | scores[hiscore_idx].rule = -1; |
1770 | scores[hiscore_idx].ifa = NULL; | |
1da177e4 | 1771 | |
8814c4b5 | 1772 | rcu_read_lock(); |
1da177e4 | 1773 | |
9131f3de YH |
1774 | /* Candidate Source Address (section 4) |
1775 | * - multicast and link-local destination address, | |
1776 | * the set of candidate source address MUST only | |
1777 | * include addresses assigned to interfaces | |
1778 | * belonging to the same link as the outgoing | |
1779 | * interface. | |
1780 | * (- For site-local destination addresses, the | |
1781 | * set of candidate source addresses MUST only | |
1782 | * include addresses assigned to interfaces | |
1783 | * belonging to the same site as the outgoing | |
1784 | * interface.) | |
3985e8a3 EK |
1785 | * - "It is RECOMMENDED that the candidate source addresses |
1786 | * be the set of unicast addresses assigned to the | |
1787 | * interface that will be used to send to the destination | |
1788 | * (the 'outgoing' interface)." (RFC 6724) | |
9131f3de YH |
1789 | */ |
1790 | if (dst_dev) { | |
3985e8a3 | 1791 | idev = __in6_dev_get(dst_dev); |
9131f3de | 1792 | if ((dst_type & IPV6_ADDR_MULTICAST) || |
3985e8a3 EK |
1793 | dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL || |
1794 | (idev && idev->cnf.use_oif_addrs_only)) { | |
9131f3de YH |
1795 | use_oif_addr = true; |
1796 | } | |
1797 | } | |
a9b05723 | 1798 | |
9131f3de | 1799 | if (use_oif_addr) { |
c0b8da1e | 1800 | if (idev) |
c15df306 | 1801 | hiscore_idx = __ipv6_dev_get_saddr(net, &dst, idev, scores, hiscore_idx); |
9131f3de | 1802 | } else { |
afbac601 DA |
1803 | const struct net_device *master; |
1804 | int master_idx = 0; | |
1805 | ||
1806 | /* if dst_dev exists and is enslaved to an L3 device, then | |
1807 | * prefer addresses from dst_dev and then the master over | |
1808 | * any other enslaved devices in the L3 domain. | |
1809 | */ | |
1810 | master = l3mdev_master_dev_rcu(dst_dev); | |
1811 | if (master) { | |
1812 | master_idx = master->ifindex; | |
1813 | ||
1814 | hiscore_idx = ipv6_get_saddr_master(net, dst_dev, | |
1815 | master, &dst, | |
1816 | scores, hiscore_idx); | |
1817 | ||
1818 | if (scores[hiscore_idx].ifa) | |
1819 | goto out; | |
1820 | } | |
1821 | ||
9131f3de | 1822 | for_each_netdev_rcu(net, dev) { |
afbac601 DA |
1823 | /* only consider addresses on devices in the |
1824 | * same L3 domain | |
1825 | */ | |
1826 | if (l3mdev_master_ifindex_rcu(dev) != master_idx) | |
1827 | continue; | |
9131f3de YH |
1828 | idev = __in6_dev_get(dev); |
1829 | if (!idev) | |
072047e4 | 1830 | continue; |
c15df306 | 1831 | hiscore_idx = __ipv6_dev_get_saddr(net, &dst, idev, scores, hiscore_idx); |
1da177e4 LT |
1832 | } |
1833 | } | |
afbac601 DA |
1834 | |
1835 | out: | |
c0b8da1e | 1836 | hiscore = &scores[hiscore_idx]; |
a9b05723 | 1837 | if (!hiscore->ifa) |
cc429c8f ED |
1838 | ret = -EADDRNOTAVAIL; |
1839 | else | |
1840 | *saddr = hiscore->ifa->addr; | |
1ab1457c | 1841 | |
cc429c8f ED |
1842 | rcu_read_unlock(); |
1843 | return ret; | |
1da177e4 | 1844 | } |
5e5f3f0f | 1845 | EXPORT_SYMBOL(ipv6_dev_get_saddr); |
1da177e4 | 1846 | |
26394fc1 IK |
1847 | static int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr, |
1848 | u32 banned_flags) | |
b7b1bfce HFS |
1849 | { |
1850 | struct inet6_ifaddr *ifp; | |
1851 | int err = -EADDRNOTAVAIL; | |
1852 | ||
602582ca HFS |
1853 | list_for_each_entry_reverse(ifp, &idev->addr_list, if_list) { |
1854 | if (ifp->scope > IFA_LINK) | |
1855 | break; | |
b7b1bfce HFS |
1856 | if (ifp->scope == IFA_LINK && |
1857 | !(ifp->flags & banned_flags)) { | |
1858 | *addr = ifp->addr; | |
1859 | err = 0; | |
1860 | break; | |
1861 | } | |
1862 | } | |
1863 | return err; | |
1864 | } | |
1865 | ||
95c385b4 | 1866 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, |
479840ff | 1867 | u32 banned_flags) |
1da177e4 LT |
1868 | { |
1869 | struct inet6_dev *idev; | |
1870 | int err = -EADDRNOTAVAIL; | |
1871 | ||
8814c4b5 | 1872 | rcu_read_lock(); |
e21e8467 SH |
1873 | idev = __in6_dev_get(dev); |
1874 | if (idev) { | |
1da177e4 | 1875 | read_lock_bh(&idev->lock); |
b7b1bfce | 1876 | err = __ipv6_get_lladdr(idev, addr, banned_flags); |
1da177e4 LT |
1877 | read_unlock_bh(&idev->lock); |
1878 | } | |
8814c4b5 | 1879 | rcu_read_unlock(); |
1da177e4 LT |
1880 | return err; |
1881 | } | |
1882 | ||
d9bf82c2 | 1883 | static int ipv6_count_addresses(const struct inet6_dev *idev) |
1da177e4 | 1884 | { |
d9bf82c2 | 1885 | const struct inet6_ifaddr *ifp; |
1da177e4 | 1886 | int cnt = 0; |
1da177e4 | 1887 | |
d9bf82c2 ED |
1888 | rcu_read_lock(); |
1889 | list_for_each_entry_rcu(ifp, &idev->addr_list, if_list) | |
1da177e4 | 1890 | cnt++; |
d9bf82c2 | 1891 | rcu_read_unlock(); |
1da177e4 LT |
1892 | return cnt; |
1893 | } | |
1894 | ||
b71d1d42 | 1895 | int ipv6_chk_addr(struct net *net, const struct in6_addr *addr, |
2a7851bf | 1896 | const struct net_device *dev, int strict) |
c58da4c6 | 1897 | { |
232378e8 DA |
1898 | return ipv6_chk_addr_and_flags(net, addr, dev, !dev, |
1899 | strict, IFA_F_TENTATIVE); | |
c58da4c6 EK |
1900 | } |
1901 | EXPORT_SYMBOL(ipv6_chk_addr); | |
1902 | ||
1893ff20 DA |
1903 | /* device argument is used to find the L3 domain of interest. If |
1904 | * skip_dev_check is set, then the ifp device is not checked against | |
1905 | * the passed in dev argument. So the 2 cases for addresses checks are: | |
1906 | * 1. does the address exist in the L3 domain that dev is part of | |
1907 | * (skip_dev_check = true), or | |
1908 | * | |
1909 | * 2. does the address exist on the specific device | |
1910 | * (skip_dev_check = false) | |
1911 | */ | |
4ef1a7cb XL |
1912 | static struct net_device * |
1913 | __ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr, | |
1914 | const struct net_device *dev, bool skip_dev_check, | |
1915 | int strict, u32 banned_flags) | |
1da177e4 | 1916 | { |
3f27fb23 | 1917 | unsigned int hash = inet6_addr_hash(net, addr); |
4ef1a7cb | 1918 | struct net_device *l3mdev, *ndev; |
eedf042a | 1919 | struct inet6_ifaddr *ifp; |
c58da4c6 | 1920 | u32 ifp_flags; |
1da177e4 | 1921 | |
480318a0 | 1922 | rcu_read_lock(); |
232378e8 | 1923 | |
1893ff20 | 1924 | l3mdev = l3mdev_master_dev_rcu(dev); |
232378e8 DA |
1925 | if (skip_dev_check) |
1926 | dev = NULL; | |
1927 | ||
e66d1172 | 1928 | hlist_for_each_entry_rcu(ifp, &net->ipv6.inet6_addr_lst[hash], addr_lst) { |
4ef1a7cb | 1929 | ndev = ifp->idev->dev; |
1893ff20 | 1930 | |
4ef1a7cb | 1931 | if (l3mdev_master_dev_rcu(ndev) != l3mdev) |
1893ff20 DA |
1932 | continue; |
1933 | ||
c58da4c6 EK |
1934 | /* Decouple optimistic from tentative for evaluation here. |
1935 | * Ban optimistic addresses explicitly, when required. | |
1936 | */ | |
1937 | ifp_flags = (ifp->flags&IFA_F_OPTIMISTIC) | |
1938 | ? (ifp->flags&~IFA_F_TENTATIVE) | |
1939 | : ifp->flags; | |
1da177e4 | 1940 | if (ipv6_addr_equal(&ifp->addr, addr) && |
c58da4c6 | 1941 | !(ifp_flags&banned_flags) && |
4ef1a7cb | 1942 | (!dev || ndev == dev || |
eedf042a | 1943 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))) { |
480318a0 | 1944 | rcu_read_unlock(); |
4ef1a7cb | 1945 | return ndev; |
1da177e4 LT |
1946 | } |
1947 | } | |
5c578aed | 1948 | |
480318a0 | 1949 | rcu_read_unlock(); |
4ef1a7cb XL |
1950 | return NULL; |
1951 | } | |
1952 | ||
1953 | int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr, | |
1954 | const struct net_device *dev, bool skip_dev_check, | |
1955 | int strict, u32 banned_flags) | |
1956 | { | |
1957 | return __ipv6_chk_addr_and_flags(net, addr, dev, skip_dev_check, | |
1958 | strict, banned_flags) ? 1 : 0; | |
1da177e4 | 1959 | } |
c58da4c6 | 1960 | EXPORT_SYMBOL(ipv6_chk_addr_and_flags); |
7159039a | 1961 | |
1da177e4 | 1962 | |
7df37ff3 CB |
1963 | /* Compares an address/prefix_len with addresses on device @dev. |
1964 | * If one is found it returns true. | |
1965 | */ | |
1966 | bool ipv6_chk_custom_prefix(const struct in6_addr *addr, | |
1967 | const unsigned int prefix_len, struct net_device *dev) | |
1968 | { | |
47e26941 ED |
1969 | const struct inet6_ifaddr *ifa; |
1970 | const struct inet6_dev *idev; | |
7df37ff3 CB |
1971 | bool ret = false; |
1972 | ||
1973 | rcu_read_lock(); | |
1974 | idev = __in6_dev_get(dev); | |
1975 | if (idev) { | |
47e26941 | 1976 | list_for_each_entry_rcu(ifa, &idev->addr_list, if_list) { |
7df37ff3 CB |
1977 | ret = ipv6_prefix_equal(addr, &ifa->addr, prefix_len); |
1978 | if (ret) | |
1979 | break; | |
1980 | } | |
7df37ff3 CB |
1981 | } |
1982 | rcu_read_unlock(); | |
1983 | ||
1984 | return ret; | |
1985 | } | |
1986 | EXPORT_SYMBOL(ipv6_chk_custom_prefix); | |
1987 | ||
b71d1d42 | 1988 | int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev) |
52eeeb84 | 1989 | { |
24ba333b ED |
1990 | const struct inet6_ifaddr *ifa; |
1991 | const struct inet6_dev *idev; | |
52eeeb84 YH |
1992 | int onlink; |
1993 | ||
1994 | onlink = 0; | |
1995 | rcu_read_lock(); | |
1996 | idev = __in6_dev_get(dev); | |
1997 | if (idev) { | |
24ba333b | 1998 | list_for_each_entry_rcu(ifa, &idev->addr_list, if_list) { |
52eeeb84 YH |
1999 | onlink = ipv6_prefix_equal(addr, &ifa->addr, |
2000 | ifa->prefix_len); | |
2001 | if (onlink) | |
2002 | break; | |
2003 | } | |
52eeeb84 YH |
2004 | } |
2005 | rcu_read_unlock(); | |
2006 | return onlink; | |
2007 | } | |
52eeeb84 YH |
2008 | EXPORT_SYMBOL(ipv6_chk_prefix); |
2009 | ||
81f6cb31 XL |
2010 | /** |
2011 | * ipv6_dev_find - find the first device with a given source address. | |
2012 | * @net: the net namespace | |
2013 | * @addr: the source address | |
2c4de211 | 2014 | * @dev: used to find the L3 domain of interest |
81f6cb31 XL |
2015 | * |
2016 | * The caller should be protected by RCU, or RTNL. | |
2017 | */ | |
4ef1a7cb XL |
2018 | struct net_device *ipv6_dev_find(struct net *net, const struct in6_addr *addr, |
2019 | struct net_device *dev) | |
81f6cb31 | 2020 | { |
4ef1a7cb XL |
2021 | return __ipv6_chk_addr_and_flags(net, addr, dev, !dev, 1, |
2022 | IFA_F_TENTATIVE); | |
81f6cb31 XL |
2023 | } |
2024 | EXPORT_SYMBOL(ipv6_dev_find); | |
2025 | ||
9acd9f3a | 2026 | struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr, |
1cab3da6 | 2027 | struct net_device *dev, int strict) |
1da177e4 | 2028 | { |
3f27fb23 | 2029 | unsigned int hash = inet6_addr_hash(net, addr); |
b79d1d54 | 2030 | struct inet6_ifaddr *ifp, *result = NULL; |
1da177e4 | 2031 | |
24f226da | 2032 | rcu_read_lock(); |
e66d1172 | 2033 | hlist_for_each_entry_rcu(ifp, &net->ipv6.inet6_addr_lst[hash], addr_lst) { |
1da177e4 | 2034 | if (ipv6_addr_equal(&ifp->addr, addr)) { |
63159f29 | 2035 | if (!dev || ifp->idev->dev == dev || |
1da177e4 | 2036 | !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) { |
b79d1d54 | 2037 | result = ifp; |
1da177e4 LT |
2038 | in6_ifa_hold(ifp); |
2039 | break; | |
2040 | } | |
2041 | } | |
2042 | } | |
24f226da | 2043 | rcu_read_unlock(); |
1da177e4 | 2044 | |
b79d1d54 | 2045 | return result; |
1da177e4 LT |
2046 | } |
2047 | ||
1da177e4 LT |
2048 | /* Gets referenced address, destroys ifaddr */ |
2049 | ||
cc411d0b | 2050 | static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed) |
1da177e4 | 2051 | { |
3d171f39 LR |
2052 | if (dad_failed) |
2053 | ifp->flags |= IFA_F_DADFAILED; | |
2054 | ||
ec8add2a | 2055 | if (ifp->flags&IFA_F_TEMPORARY) { |
1da177e4 LT |
2056 | struct inet6_ifaddr *ifpub; |
2057 | spin_lock_bh(&ifp->lock); | |
2058 | ifpub = ifp->ifpub; | |
2059 | if (ifpub) { | |
2060 | in6_ifa_hold(ifpub); | |
2061 | spin_unlock_bh(&ifp->lock); | |
969c5464 | 2062 | ipv6_create_tempaddr(ifpub, true); |
1da177e4 LT |
2063 | in6_ifa_put(ifpub); |
2064 | } else { | |
2065 | spin_unlock_bh(&ifp->lock); | |
2066 | } | |
2067 | ipv6_del_addr(ifp); | |
ec8add2a SD |
2068 | } else if (ifp->flags&IFA_F_PERMANENT || !dad_failed) { |
2069 | spin_lock_bh(&ifp->lock); | |
2070 | addrconf_del_dad_work(ifp); | |
2071 | ifp->flags |= IFA_F_TENTATIVE; | |
f1c02cfb SD |
2072 | if (dad_failed) |
2073 | ifp->flags &= ~IFA_F_OPTIMISTIC; | |
ec8add2a SD |
2074 | spin_unlock_bh(&ifp->lock); |
2075 | if (dad_failed) | |
2076 | ipv6_ifa_notify(0, ifp); | |
2077 | in6_ifa_put(ifp); | |
c15b1cca | 2078 | } else { |
1da177e4 | 2079 | ipv6_del_addr(ifp); |
c15b1cca | 2080 | } |
1da177e4 LT |
2081 | } |
2082 | ||
f2344a13 HX |
2083 | static int addrconf_dad_end(struct inet6_ifaddr *ifp) |
2084 | { | |
2085 | int err = -ENOENT; | |
2086 | ||
8e8e676d | 2087 | spin_lock_bh(&ifp->lock); |
f2344a13 HX |
2088 | if (ifp->state == INET6_IFADDR_STATE_DAD) { |
2089 | ifp->state = INET6_IFADDR_STATE_POSTDAD; | |
2090 | err = 0; | |
2091 | } | |
8e8e676d | 2092 | spin_unlock_bh(&ifp->lock); |
f2344a13 HX |
2093 | |
2094 | return err; | |
2095 | } | |
2096 | ||
da13c59b | 2097 | void addrconf_dad_failure(struct sk_buff *skb, struct inet6_ifaddr *ifp) |
3c21edbd | 2098 | { |
1b34be74 | 2099 | struct inet6_dev *idev = ifp->idev; |
e66d1172 | 2100 | struct net *net = dev_net(idev->dev); |
9bdd8d40 | 2101 | |
853dc2e0 UB |
2102 | if (addrconf_dad_end(ifp)) { |
2103 | in6_ifa_put(ifp); | |
f2344a13 | 2104 | return; |
853dc2e0 | 2105 | } |
f2344a13 | 2106 | |
da13c59b VP |
2107 | net_info_ratelimited("%s: IPv6 duplicate address %pI6c used by %pM detected!\n", |
2108 | ifp->idev->dev->name, &ifp->addr, eth_hdr(skb)->h_source); | |
9bdd8d40 | 2109 | |
5f40ef77 HFS |
2110 | spin_lock_bh(&ifp->lock); |
2111 | ||
2112 | if (ifp->flags & IFA_F_STABLE_PRIVACY) { | |
5f40ef77 HFS |
2113 | struct in6_addr new_addr; |
2114 | struct inet6_ifaddr *ifp2; | |
5f40ef77 | 2115 | int retries = ifp->stable_privacy_retry + 1; |
e6464b8c DA |
2116 | struct ifa6_config cfg = { |
2117 | .pfx = &new_addr, | |
2118 | .plen = ifp->prefix_len, | |
2119 | .ifa_flags = ifp->flags, | |
2120 | .valid_lft = ifp->valid_lft, | |
2121 | .preferred_lft = ifp->prefered_lft, | |
2122 | .scope = ifp->scope, | |
2123 | }; | |
5f40ef77 | 2124 | |
1855b7c3 | 2125 | if (retries > net->ipv6.sysctl.idgen_retries) { |
5f40ef77 HFS |
2126 | net_info_ratelimited("%s: privacy stable address generation failed because of DAD conflicts!\n", |
2127 | ifp->idev->dev->name); | |
2128 | goto errdad; | |
2129 | } | |
2130 | ||
2131 | new_addr = ifp->addr; | |
2132 | if (ipv6_generate_stable_address(&new_addr, retries, | |
2133 | idev)) | |
2134 | goto errdad; | |
2135 | ||
5f40ef77 | 2136 | spin_unlock_bh(&ifp->lock); |
1b34be74 | 2137 | |
5f40ef77 HFS |
2138 | if (idev->cnf.max_addresses && |
2139 | ipv6_count_addresses(idev) >= | |
2140 | idev->cnf.max_addresses) | |
2141 | goto lock_errdad; | |
2142 | ||
2143 | net_info_ratelimited("%s: generating new stable privacy address because of DAD conflict\n", | |
2144 | ifp->idev->dev->name); | |
2145 | ||
e6464b8c | 2146 | ifp2 = ipv6_add_addr(idev, &cfg, false, NULL); |
5f40ef77 HFS |
2147 | if (IS_ERR(ifp2)) |
2148 | goto lock_errdad; | |
2149 | ||
2150 | spin_lock_bh(&ifp2->lock); | |
2151 | ifp2->stable_privacy_retry = retries; | |
2152 | ifp2->state = INET6_IFADDR_STATE_PREDAD; | |
2153 | spin_unlock_bh(&ifp2->lock); | |
2154 | ||
1855b7c3 | 2155 | addrconf_mod_dad_work(ifp2, net->ipv6.sysctl.idgen_delay); |
5f40ef77 HFS |
2156 | in6_ifa_put(ifp2); |
2157 | lock_errdad: | |
2158 | spin_lock_bh(&ifp->lock); | |
1b34be74 YH |
2159 | } |
2160 | ||
5f40ef77 | 2161 | errdad: |
c15b1cca HFS |
2162 | /* transition from _POSTDAD to _ERRDAD */ |
2163 | ifp->state = INET6_IFADDR_STATE_ERRDAD; | |
8e8e676d | 2164 | spin_unlock_bh(&ifp->lock); |
c15b1cca HFS |
2165 | |
2166 | addrconf_mod_dad_work(ifp, 0); | |
751eb6b6 | 2167 | in6_ifa_put(ifp); |
3c21edbd | 2168 | } |
1da177e4 | 2169 | |
a9ed4a29 SD |
2170 | /* Join to solicited addr multicast group. |
2171 | * caller must hold RTNL */ | |
b71d1d42 | 2172 | void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr) |
1da177e4 LT |
2173 | { |
2174 | struct in6_addr maddr; | |
2175 | ||
2176 | if (dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
2177 | return; | |
2178 | ||
2179 | addrconf_addr_solict_mult(addr, &maddr); | |
2180 | ipv6_dev_mc_inc(dev, &maddr); | |
2181 | } | |
2182 | ||
a9ed4a29 | 2183 | /* caller must hold RTNL */ |
b71d1d42 | 2184 | void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr) |
1da177e4 LT |
2185 | { |
2186 | struct in6_addr maddr; | |
2187 | ||
2188 | if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP)) | |
2189 | return; | |
2190 | ||
2191 | addrconf_addr_solict_mult(addr, &maddr); | |
2192 | __ipv6_dev_mc_dec(idev, &maddr); | |
2193 | } | |
2194 | ||
a9ed4a29 | 2195 | /* caller must hold RTNL */ |
20380731 | 2196 | static void addrconf_join_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
2197 | { |
2198 | struct in6_addr addr; | |
c15b1cca | 2199 | |
88ad3149 | 2200 | if (ifp->prefix_len >= 127) /* RFC 6164 */ |
2bda8a0c | 2201 | return; |
1da177e4 LT |
2202 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
2203 | if (ipv6_addr_any(&addr)) | |
2204 | return; | |
013b4d90 | 2205 | __ipv6_dev_ac_inc(ifp->idev, &addr); |
1da177e4 LT |
2206 | } |
2207 | ||
a9ed4a29 | 2208 | /* caller must hold RTNL */ |
20380731 | 2209 | static void addrconf_leave_anycast(struct inet6_ifaddr *ifp) |
1da177e4 LT |
2210 | { |
2211 | struct in6_addr addr; | |
c15b1cca | 2212 | |
88ad3149 | 2213 | if (ifp->prefix_len >= 127) /* RFC 6164 */ |
32019e65 | 2214 | return; |
1da177e4 LT |
2215 | ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len); |
2216 | if (ipv6_addr_any(&addr)) | |
2217 | return; | |
2218 | __ipv6_dev_ac_dec(ifp->idev, &addr); | |
2219 | } | |
2220 | ||
8a7a4b47 | 2221 | static int addrconf_ifid_6lowpan(u8 *eui, struct net_device *dev) |
06a4c1c5 | 2222 | { |
8a7a4b47 AA |
2223 | switch (dev->addr_len) { |
2224 | case ETH_ALEN: | |
9dae2e03 LAD |
2225 | memcpy(eui, dev->dev_addr, 3); |
2226 | eui[3] = 0xFF; | |
2227 | eui[4] = 0xFE; | |
2228 | memcpy(eui + 5, dev->dev_addr + 3, 3); | |
2229 | break; | |
8a7a4b47 AA |
2230 | case EUI64_ADDR_LEN: |
2231 | memcpy(eui, dev->dev_addr, EUI64_ADDR_LEN); | |
2232 | eui[0] ^= 2; | |
2233 | break; | |
2234 | default: | |
06a4c1c5 | 2235 | return -1; |
8a7a4b47 AA |
2236 | } |
2237 | ||
06a4c1c5 | 2238 | return 0; |
2239 | } | |
2240 | ||
cb6bf355 YH |
2241 | static int addrconf_ifid_ieee1394(u8 *eui, struct net_device *dev) |
2242 | { | |
1a8a23d2 | 2243 | const union fwnet_hwaddr *ha; |
cb6bf355 YH |
2244 | |
2245 | if (dev->addr_len != FWNET_ALEN) | |
2246 | return -1; | |
2247 | ||
1a8a23d2 | 2248 | ha = (const union fwnet_hwaddr *)dev->dev_addr; |
cb6bf355 YH |
2249 | |
2250 | memcpy(eui, &ha->uc.uniq_id, sizeof(ha->uc.uniq_id)); | |
2251 | eui[0] ^= 2; | |
2252 | return 0; | |
2253 | } | |
2254 | ||
073a8e0e YH |
2255 | static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev) |
2256 | { | |
2257 | /* XXX: inherit EUI-64 from other interface -- yoshfuji */ | |
2258 | if (dev->addr_len != ARCNET_ALEN) | |
2259 | return -1; | |
2260 | memset(eui, 0, 7); | |
8e5e8f30 | 2261 | eui[7] = *(u8 *)dev->dev_addr; |
073a8e0e YH |
2262 | return 0; |
2263 | } | |
2264 | ||
2265 | static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev) | |
2266 | { | |
2267 | if (dev->addr_len != INFINIBAND_ALEN) | |
2268 | return -1; | |
2269 | memcpy(eui, dev->dev_addr + 12, 8); | |
2270 | eui[0] |= 2; | |
2271 | return 0; | |
2272 | } | |
2273 | ||
c61393ea | 2274 | static int __ipv6_isatap_ifid(u8 *eui, __be32 addr) |
dfd982ba | 2275 | { |
9af28511 SH |
2276 | if (addr == 0) |
2277 | return -1; | |
dfd982ba YH |
2278 | eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) || |
2279 | ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) || | |
2280 | ipv4_is_private_172(addr) || ipv4_is_test_192(addr) || | |
2281 | ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) || | |
2282 | ipv4_is_test_198(addr) || ipv4_is_multicast(addr) || | |
2283 | ipv4_is_lbcast(addr)) ? 0x00 : 0x02; | |
2284 | eui[1] = 0; | |
2285 | eui[2] = 0x5E; | |
2286 | eui[3] = 0xFE; | |
2287 | memcpy(eui + 4, &addr, 4); | |
2288 | return 0; | |
2289 | } | |
dfd982ba YH |
2290 | |
2291 | static int addrconf_ifid_sit(u8 *eui, struct net_device *dev) | |
2292 | { | |
2293 | if (dev->priv_flags & IFF_ISATAP) | |
2294 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); | |
2295 | return -1; | |
2296 | } | |
2297 | ||
aee80b54 | 2298 | static int addrconf_ifid_gre(u8 *eui, struct net_device *dev) |
2299 | { | |
2300 | return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr); | |
2301 | } | |
2302 | ||
e837735e ND |
2303 | static int addrconf_ifid_ip6tnl(u8 *eui, struct net_device *dev) |
2304 | { | |
2305 | memcpy(eui, dev->perm_addr, 3); | |
2306 | memcpy(eui + 5, dev->perm_addr + 3, 3); | |
2307 | eui[3] = 0xFF; | |
2308 | eui[4] = 0xFE; | |
2309 | eui[0] ^= 2; | |
2310 | return 0; | |
2311 | } | |
2312 | ||
1da177e4 LT |
2313 | static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) |
2314 | { | |
2315 | switch (dev->type) { | |
2316 | case ARPHRD_ETHER: | |
2317 | case ARPHRD_FDDI: | |
073a8e0e | 2318 | return addrconf_ifid_eui48(eui, dev); |
1da177e4 | 2319 | case ARPHRD_ARCNET: |
073a8e0e | 2320 | return addrconf_ifid_arcnet(eui, dev); |
1da177e4 | 2321 | case ARPHRD_INFINIBAND: |
073a8e0e | 2322 | return addrconf_ifid_infiniband(eui, dev); |
c7dc89c0 | 2323 | case ARPHRD_SIT: |
dfd982ba | 2324 | return addrconf_ifid_sit(eui, dev); |
aee80b54 | 2325 | case ARPHRD_IPGRE: |
45ce0fd1 | 2326 | case ARPHRD_TUNNEL: |
aee80b54 | 2327 | return addrconf_ifid_gre(eui, dev); |
e74bccb8 | 2328 | case ARPHRD_6LOWPAN: |
8a7a4b47 | 2329 | return addrconf_ifid_6lowpan(eui, dev); |
cb6bf355 YH |
2330 | case ARPHRD_IEEE1394: |
2331 | return addrconf_ifid_ieee1394(eui, dev); | |
e837735e | 2332 | case ARPHRD_TUNNEL6: |
45ce0fd1 | 2333 | case ARPHRD_IP6GRE: |
9deb441c | 2334 | case ARPHRD_RAWIP: |
e837735e | 2335 | return addrconf_ifid_ip6tnl(eui, dev); |
1da177e4 LT |
2336 | } |
2337 | return -1; | |
2338 | } | |
2339 | ||
2340 | static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev) | |
2341 | { | |
2342 | int err = -1; | |
2343 | struct inet6_ifaddr *ifp; | |
2344 | ||
2345 | read_lock_bh(&idev->lock); | |
602582ca HFS |
2346 | list_for_each_entry_reverse(ifp, &idev->addr_list, if_list) { |
2347 | if (ifp->scope > IFA_LINK) | |
2348 | break; | |
1da177e4 LT |
2349 | if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { |
2350 | memcpy(eui, ifp->addr.s6_addr+8, 8); | |
2351 | err = 0; | |
2352 | break; | |
2353 | } | |
2354 | } | |
2355 | read_unlock_bh(&idev->lock); | |
2356 | return err; | |
2357 | } | |
2358 | ||
969c5464 FG |
2359 | /* Generation of a randomized Interface Identifier |
2360 | * draft-ietf-6man-rfc4941bis, Section 3.3.1 | |
2361 | */ | |
2362 | ||
2363 | static void ipv6_gen_rnd_iid(struct in6_addr *addr) | |
1da177e4 | 2364 | { |
1da177e4 | 2365 | regen: |
969c5464 | 2366 | get_random_bytes(&addr->s6_addr[8], 8); |
1da177e4 | 2367 | |
969c5464 FG |
2368 | /* <draft-ietf-6man-rfc4941bis-08.txt>, Section 3.3.1: |
2369 | * check if generated address is not inappropriate: | |
1da177e4 | 2370 | * |
912b519a | 2371 | * - Reserved IPv6 Interface Identifiers |
969c5464 | 2372 | * - XXX: already assigned to an address on the device |
1da177e4 | 2373 | */ |
969c5464 FG |
2374 | |
2375 | /* Subnet-router anycast: 0000:0000:0000:0000 */ | |
2376 | if (!(addr->s6_addr32[2] | addr->s6_addr32[3])) | |
1da177e4 | 2377 | goto regen; |
1da177e4 | 2378 | |
969c5464 FG |
2379 | /* IANA Ethernet block: 0200:5EFF:FE00:0000-0200:5EFF:FE00:5212 |
2380 | * Proxy Mobile IPv6: 0200:5EFF:FE00:5213 | |
2381 | * IANA Ethernet block: 0200:5EFF:FE00:5214-0200:5EFF:FEFF:FFFF | |
2382 | */ | |
2383 | if (ntohl(addr->s6_addr32[2]) == 0x02005eff && | |
2384 | (ntohl(addr->s6_addr32[3]) & 0Xff000000) == 0xfe000000) | |
2385 | goto regen; | |
2386 | ||
2387 | /* Reserved subnet anycast addresses */ | |
2388 | if (ntohl(addr->s6_addr32[2]) == 0xfdffffff && | |
2389 | ntohl(addr->s6_addr32[3]) >= 0Xffffff80) | |
2390 | goto regen; | |
1da177e4 | 2391 | } |
1da177e4 LT |
2392 | |
2393 | /* | |
2394 | * Add prefix route. | |
2395 | */ | |
2396 | ||
2397 | static void | |
8308f3ff DA |
2398 | addrconf_prefix_route(struct in6_addr *pfx, int plen, u32 metric, |
2399 | struct net_device *dev, unsigned long expires, | |
2400 | u32 flags, gfp_t gfp_flags) | |
1da177e4 | 2401 | { |
86872cb5 | 2402 | struct fib6_config cfg = { |
ca254490 | 2403 | .fc_table = l3mdev_fib_table(dev) ? : RT6_TABLE_PREFIX, |
8308f3ff | 2404 | .fc_metric = metric ? : IP6_RT_PRIO_ADDRCONF, |
86872cb5 TG |
2405 | .fc_ifindex = dev->ifindex, |
2406 | .fc_expires = expires, | |
2407 | .fc_dst_len = plen, | |
2408 | .fc_flags = RTF_UP | flags, | |
c346dca1 | 2409 | .fc_nlinfo.nl_net = dev_net(dev), |
f410a1fb | 2410 | .fc_protocol = RTPROT_KERNEL, |
e8478e80 | 2411 | .fc_type = RTN_UNICAST, |
86872cb5 | 2412 | }; |
1da177e4 | 2413 | |
4e3fd7a0 | 2414 | cfg.fc_dst = *pfx; |
1da177e4 LT |
2415 | |
2416 | /* Prevent useless cloning on PtP SIT. | |
2417 | This thing is done here expecting that the whole | |
2418 | class of non-broadcast devices need not cloning. | |
2419 | */ | |
07a93626 | 2420 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
86872cb5 TG |
2421 | if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT)) |
2422 | cfg.fc_flags |= RTF_NONEXTHOP; | |
0be669bb | 2423 | #endif |
1da177e4 | 2424 | |
acb54e3c | 2425 | ip6_route_add(&cfg, gfp_flags, NULL); |
1da177e4 LT |
2426 | } |
2427 | ||
14ef37b6 | 2428 | |
8d1c802b | 2429 | static struct fib6_info *addrconf_get_prefix_route(const struct in6_addr *pfx, |
14ef37b6 AH |
2430 | int plen, |
2431 | const struct net_device *dev, | |
2b2450ca DA |
2432 | u32 flags, u32 noflags, |
2433 | bool no_gw) | |
14ef37b6 AH |
2434 | { |
2435 | struct fib6_node *fn; | |
8d1c802b | 2436 | struct fib6_info *rt = NULL; |
14ef37b6 | 2437 | struct fib6_table *table; |
ca254490 | 2438 | u32 tb_id = l3mdev_fib_table(dev) ? : RT6_TABLE_PREFIX; |
14ef37b6 | 2439 | |
ca254490 | 2440 | table = fib6_get_table(dev_net(dev), tb_id); |
63159f29 | 2441 | if (!table) |
14ef37b6 AH |
2442 | return NULL; |
2443 | ||
66f5d6ce | 2444 | rcu_read_lock(); |
38fbeeee | 2445 | fn = fib6_locate(&table->tb6_root, pfx, plen, NULL, 0, true); |
14ef37b6 AH |
2446 | if (!fn) |
2447 | goto out; | |
1f56a01f | 2448 | |
66f5d6ce | 2449 | for_each_fib6_node_rt_rcu(fn) { |
f88d8ea6 DA |
2450 | /* prefix routes only use builtin fib6_nh */ |
2451 | if (rt->nh) | |
2452 | continue; | |
2453 | ||
1cf844c7 | 2454 | if (rt->fib6_nh->fib_nh_dev->ifindex != dev->ifindex) |
14ef37b6 | 2455 | continue; |
1cf844c7 | 2456 | if (no_gw && rt->fib6_nh->fib_nh_gw_family) |
2b2450ca | 2457 | continue; |
93c2fb25 | 2458 | if ((rt->fib6_flags & flags) != flags) |
14ef37b6 | 2459 | continue; |
93c2fb25 | 2460 | if ((rt->fib6_flags & noflags) != 0) |
14ef37b6 | 2461 | continue; |
e873e4b9 WW |
2462 | if (!fib6_info_hold_safe(rt)) |
2463 | continue; | |
14ef37b6 AH |
2464 | break; |
2465 | } | |
2466 | out: | |
66f5d6ce | 2467 | rcu_read_unlock(); |
14ef37b6 AH |
2468 | return rt; |
2469 | } | |
2470 | ||
2471 | ||
1da177e4 LT |
2472 | /* Create "default" multicast route to the interface */ |
2473 | ||
2474 | static void addrconf_add_mroute(struct net_device *dev) | |
2475 | { | |
86872cb5 | 2476 | struct fib6_config cfg = { |
ca254490 | 2477 | .fc_table = l3mdev_fib_table(dev) ? : RT6_TABLE_LOCAL, |
86872cb5 TG |
2478 | .fc_metric = IP6_RT_PRIO_ADDRCONF, |
2479 | .fc_ifindex = dev->ifindex, | |
2480 | .fc_dst_len = 8, | |
2481 | .fc_flags = RTF_UP, | |
ceed9038 | 2482 | .fc_type = RTN_MULTICAST, |
c346dca1 | 2483 | .fc_nlinfo.nl_net = dev_net(dev), |
a826b043 | 2484 | .fc_protocol = RTPROT_KERNEL, |
86872cb5 TG |
2485 | }; |
2486 | ||
2487 | ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); | |
2488 | ||
e500c6d3 | 2489 | ip6_route_add(&cfg, GFP_KERNEL, NULL); |
1da177e4 LT |
2490 | } |
2491 | ||
1da177e4 LT |
2492 | static struct inet6_dev *addrconf_add_dev(struct net_device *dev) |
2493 | { | |
2494 | struct inet6_dev *idev; | |
2495 | ||
2496 | ASSERT_RTNL(); | |
2497 | ||
e21e8467 | 2498 | idev = ipv6_find_idev(dev); |
db0b99f5 SD |
2499 | if (IS_ERR(idev)) |
2500 | return idev; | |
64e724f6 BH |
2501 | |
2502 | if (idev->cnf.disable_ipv6) | |
2503 | return ERR_PTR(-EACCES); | |
1da177e4 LT |
2504 | |
2505 | /* Add default multicast route */ | |
ba46ee4c | 2506 | if (!(dev->flags & IFF_LOOPBACK) && !netif_is_l3_master(dev)) |
4af04aba | 2507 | addrconf_add_mroute(dev); |
1da177e4 | 2508 | |
1da177e4 LT |
2509 | return idev; |
2510 | } | |
2511 | ||
53bd6749 JP |
2512 | static void manage_tempaddrs(struct inet6_dev *idev, |
2513 | struct inet6_ifaddr *ifp, | |
2514 | __u32 valid_lft, __u32 prefered_lft, | |
2515 | bool create, unsigned long now) | |
2516 | { | |
2517 | u32 flags; | |
2518 | struct inet6_ifaddr *ift; | |
2519 | ||
2520 | read_lock_bh(&idev->lock); | |
2521 | /* update all temporary addresses in the list */ | |
2522 | list_for_each_entry(ift, &idev->tempaddr_list, tmp_list) { | |
2523 | int age, max_valid, max_prefered; | |
2524 | ||
2525 | if (ifp != ift->ifpub) | |
2526 | continue; | |
2527 | ||
2528 | /* RFC 4941 section 3.3: | |
2529 | * If a received option will extend the lifetime of a public | |
2530 | * address, the lifetimes of temporary addresses should | |
2531 | * be extended, subject to the overall constraint that no | |
2532 | * temporary addresses should ever remain "valid" or "preferred" | |
2533 | * for a time longer than (TEMP_VALID_LIFETIME) or | |
2534 | * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR), respectively. | |
2535 | */ | |
2536 | age = (now - ift->cstamp) / HZ; | |
2537 | max_valid = idev->cnf.temp_valid_lft - age; | |
2538 | if (max_valid < 0) | |
2539 | max_valid = 0; | |
2540 | ||
2541 | max_prefered = idev->cnf.temp_prefered_lft - | |
76506a98 | 2542 | idev->desync_factor - age; |
53bd6749 JP |
2543 | if (max_prefered < 0) |
2544 | max_prefered = 0; | |
2545 | ||
2546 | if (valid_lft > max_valid) | |
2547 | valid_lft = max_valid; | |
2548 | ||
2549 | if (prefered_lft > max_prefered) | |
2550 | prefered_lft = max_prefered; | |
2551 | ||
2552 | spin_lock(&ift->lock); | |
2553 | flags = ift->flags; | |
2554 | ift->valid_lft = valid_lft; | |
2555 | ift->prefered_lft = prefered_lft; | |
2556 | ift->tstamp = now; | |
2557 | if (prefered_lft > 0) | |
2558 | ift->flags &= ~IFA_F_DEPRECATED; | |
2559 | ||
2560 | spin_unlock(&ift->lock); | |
2561 | if (!(flags&IFA_F_TENTATIVE)) | |
2562 | ipv6_ifa_notify(0, ift); | |
2563 | } | |
2564 | ||
2565 | if ((create || list_empty(&idev->tempaddr_list)) && | |
2566 | idev->cnf.use_tempaddr > 0) { | |
2567 | /* When a new public address is created as described | |
2568 | * in [ADDRCONF], also create a new temporary address. | |
2569 | * Also create a temporary address if it's enabled but | |
2570 | * no temporary address currently exists. | |
2571 | */ | |
2572 | read_unlock_bh(&idev->lock); | |
969c5464 | 2573 | ipv6_create_tempaddr(ifp, false); |
53bd6749 JP |
2574 | } else { |
2575 | read_unlock_bh(&idev->lock); | |
2576 | } | |
2577 | } | |
2578 | ||
cc9da6cc BM |
2579 | static bool is_addr_mode_generate_stable(struct inet6_dev *idev) |
2580 | { | |
d35a00b8 FJ |
2581 | return idev->cnf.addr_gen_mode == IN6_ADDR_GEN_MODE_STABLE_PRIVACY || |
2582 | idev->cnf.addr_gen_mode == IN6_ADDR_GEN_MODE_RANDOM; | |
cc9da6cc BM |
2583 | } |
2584 | ||
cc84b3c6 AA |
2585 | int addrconf_prefix_rcv_add_addr(struct net *net, struct net_device *dev, |
2586 | const struct prefix_info *pinfo, | |
2587 | struct inet6_dev *in6_dev, | |
2588 | const struct in6_addr *addr, int addr_type, | |
2589 | u32 addr_flags, bool sllao, bool tokenized, | |
2590 | __u32 valid_lft, u32 prefered_lft) | |
4f672235 AA |
2591 | { |
2592 | struct inet6_ifaddr *ifp = ipv6_get_ifaddr(net, addr, dev, 1); | |
36268983 | 2593 | int create = 0, update_lft = 0; |
4f672235 AA |
2594 | |
2595 | if (!ifp && valid_lft) { | |
2596 | int max_addresses = in6_dev->cnf.max_addresses; | |
e6464b8c DA |
2597 | struct ifa6_config cfg = { |
2598 | .pfx = addr, | |
2599 | .plen = pinfo->prefix_len, | |
2600 | .ifa_flags = addr_flags, | |
2601 | .valid_lft = valid_lft, | |
2602 | .preferred_lft = prefered_lft, | |
2603 | .scope = addr_type & IPV6_ADDR_SCOPE_MASK, | |
47f0bd50 | 2604 | .ifa_proto = IFAPROT_KERNEL_RA |
e6464b8c | 2605 | }; |
4f672235 AA |
2606 | |
2607 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
35e015e1 MC |
2608 | if ((net->ipv6.devconf_all->optimistic_dad || |
2609 | in6_dev->cnf.optimistic_dad) && | |
4f672235 | 2610 | !net->ipv6.devconf_all->forwarding && sllao) |
e6464b8c | 2611 | cfg.ifa_flags |= IFA_F_OPTIMISTIC; |
4f672235 AA |
2612 | #endif |
2613 | ||
2614 | /* Do not allow to create too much of autoconfigured | |
2615 | * addresses; this would be too easy way to crash kernel. | |
2616 | */ | |
2617 | if (!max_addresses || | |
2618 | ipv6_count_addresses(in6_dev) < max_addresses) | |
e6464b8c | 2619 | ifp = ipv6_add_addr(in6_dev, &cfg, false, NULL); |
4f672235 AA |
2620 | |
2621 | if (IS_ERR_OR_NULL(ifp)) | |
2622 | return -1; | |
2623 | ||
4f672235 AA |
2624 | create = 1; |
2625 | spin_lock_bh(&ifp->lock); | |
2626 | ifp->flags |= IFA_F_MANAGETEMPADDR; | |
2627 | ifp->cstamp = jiffies; | |
2628 | ifp->tokenized = tokenized; | |
2629 | spin_unlock_bh(&ifp->lock); | |
2630 | addrconf_dad_start(ifp); | |
2631 | } | |
2632 | ||
2633 | if (ifp) { | |
2634 | u32 flags; | |
2635 | unsigned long now; | |
2636 | u32 stored_lft; | |
2637 | ||
36268983 | 2638 | /* update lifetime (RFC2462 5.5.3 e) */ |
4f672235 AA |
2639 | spin_lock_bh(&ifp->lock); |
2640 | now = jiffies; | |
2641 | if (ifp->valid_lft > (now - ifp->tstamp) / HZ) | |
2642 | stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; | |
2643 | else | |
2644 | stored_lft = 0; | |
b75326c2 | 2645 | if (!create && stored_lft) { |
36268983 GN |
2646 | const u32 minimum_lft = min_t(u32, |
2647 | stored_lft, MIN_VALID_LIFETIME); | |
2648 | valid_lft = max(valid_lft, minimum_lft); | |
2649 | ||
2650 | /* RFC4862 Section 5.5.3e: | |
2651 | * "Note that the preferred lifetime of the | |
2652 | * corresponding address is always reset to | |
2653 | * the Preferred Lifetime in the received | |
2654 | * Prefix Information option, regardless of | |
2655 | * whether the valid lifetime is also reset or | |
2656 | * ignored." | |
2657 | * | |
2658 | * So we should always update prefered_lft here. | |
2659 | */ | |
2660 | update_lft = 1; | |
2661 | } | |
2662 | ||
2663 | if (update_lft) { | |
4f672235 AA |
2664 | ifp->valid_lft = valid_lft; |
2665 | ifp->prefered_lft = prefered_lft; | |
2666 | ifp->tstamp = now; | |
2667 | flags = ifp->flags; | |
2668 | ifp->flags &= ~IFA_F_DEPRECATED; | |
2669 | spin_unlock_bh(&ifp->lock); | |
2670 | ||
2671 | if (!(flags&IFA_F_TENTATIVE)) | |
2672 | ipv6_ifa_notify(0, ifp); | |
2673 | } else | |
2674 | spin_unlock_bh(&ifp->lock); | |
2675 | ||
2676 | manage_tempaddrs(in6_dev, ifp, valid_lft, prefered_lft, | |
2677 | create, now); | |
2678 | ||
2679 | in6_ifa_put(ifp); | |
8805d13f | 2680 | addrconf_verify(net); |
4f672235 AA |
2681 | } |
2682 | ||
2683 | return 0; | |
2684 | } | |
cc84b3c6 | 2685 | EXPORT_SYMBOL_GPL(addrconf_prefix_rcv_add_addr); |
4f672235 | 2686 | |
e6bff995 | 2687 | void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao) |
1da177e4 LT |
2688 | { |
2689 | struct prefix_info *pinfo; | |
2690 | __u32 valid_lft; | |
2691 | __u32 prefered_lft; | |
4f672235 | 2692 | int addr_type, err; |
64236f3f | 2693 | u32 addr_flags = 0; |
1da177e4 | 2694 | struct inet6_dev *in6_dev; |
56d417b1 | 2695 | struct net *net = dev_net(dev); |
1da177e4 LT |
2696 | |
2697 | pinfo = (struct prefix_info *) opt; | |
1ab1457c | 2698 | |
1da177e4 | 2699 | if (len < sizeof(struct prefix_info)) { |
e32ac250 | 2700 | netdev_dbg(dev, "addrconf: prefix option too short\n"); |
1da177e4 LT |
2701 | return; |
2702 | } | |
1ab1457c | 2703 | |
1da177e4 LT |
2704 | /* |
2705 | * Validation checks ([ADDRCONF], page 19) | |
2706 | */ | |
2707 | ||
2708 | addr_type = ipv6_addr_type(&pinfo->prefix); | |
2709 | ||
2710 | if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)) | |
2711 | return; | |
2712 | ||
2713 | valid_lft = ntohl(pinfo->valid); | |
2714 | prefered_lft = ntohl(pinfo->prefered); | |
2715 | ||
2716 | if (prefered_lft > valid_lft) { | |
e87cc472 | 2717 | net_warn_ratelimited("addrconf: prefix option has invalid lifetime\n"); |
1da177e4 LT |
2718 | return; |
2719 | } | |
2720 | ||
2721 | in6_dev = in6_dev_get(dev); | |
2722 | ||
63159f29 | 2723 | if (!in6_dev) { |
e87cc472 JP |
2724 | net_dbg_ratelimited("addrconf: device %s not configured\n", |
2725 | dev->name); | |
1da177e4 LT |
2726 | return; |
2727 | } | |
2728 | ||
2729 | /* | |
2730 | * Two things going on here: | |
2731 | * 1) Add routes for on-link prefixes | |
2732 | * 2) Configure prefixes with the auto flag set | |
2733 | */ | |
2734 | ||
4bed72e4 | 2735 | if (pinfo->onlink) { |
8d1c802b | 2736 | struct fib6_info *rt; |
4bed72e4 YH |
2737 | unsigned long rt_expires; |
2738 | ||
6f704992 YH |
2739 | /* Avoid arithmetic overflow. Really, we could |
2740 | * save rt_expires in seconds, likely valid_lft, | |
2741 | * but it would require division in fib gc, that it | |
2742 | * not good. | |
2743 | */ | |
4bed72e4 YH |
2744 | if (HZ > USER_HZ) |
2745 | rt_expires = addrconf_timeout_fixup(valid_lft, HZ); | |
2746 | else | |
2747 | rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ); | |
3dd4bc68 | 2748 | |
4bed72e4 YH |
2749 | if (addrconf_finite_timeout(rt_expires)) |
2750 | rt_expires *= HZ; | |
1da177e4 | 2751 | |
14ef37b6 AH |
2752 | rt = addrconf_get_prefix_route(&pinfo->prefix, |
2753 | pinfo->prefix_len, | |
2754 | dev, | |
2755 | RTF_ADDRCONF | RTF_PREFIX_RT, | |
2b2450ca | 2756 | RTF_DEFAULT, true); |
1da177e4 | 2757 | |
14ef37b6 | 2758 | if (rt) { |
6f704992 YH |
2759 | /* Autoconf prefix route */ |
2760 | if (valid_lft == 0) { | |
11dd74b3 | 2761 | ip6_del_rt(net, rt, false); |
6f704992 | 2762 | rt = NULL; |
4bed72e4 | 2763 | } else if (addrconf_finite_timeout(rt_expires)) { |
6f704992 | 2764 | /* not infinity */ |
14895687 | 2765 | fib6_set_expires(rt, jiffies + rt_expires); |
6f704992 | 2766 | } else { |
14895687 | 2767 | fib6_clean_expires(rt); |
1da177e4 LT |
2768 | } |
2769 | } else if (valid_lft) { | |
6f704992 | 2770 | clock_t expires = 0; |
4bed72e4 YH |
2771 | int flags = RTF_ADDRCONF | RTF_PREFIX_RT; |
2772 | if (addrconf_finite_timeout(rt_expires)) { | |
6f704992 YH |
2773 | /* not infinity */ |
2774 | flags |= RTF_EXPIRES; | |
2775 | expires = jiffies_to_clock_t(rt_expires); | |
2776 | } | |
1da177e4 | 2777 | addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, |
8308f3ff DA |
2778 | 0, dev, expires, flags, |
2779 | GFP_ATOMIC); | |
1da177e4 | 2780 | } |
93531c67 | 2781 | fib6_info_release(rt); |
1da177e4 LT |
2782 | } |
2783 | ||
2784 | /* Try to figure out our local address for this prefix */ | |
2785 | ||
2786 | if (pinfo->autoconf && in6_dev->cnf.autoconf) { | |
1da177e4 | 2787 | struct in6_addr addr; |
f997c55c | 2788 | bool tokenized = false, dev_addr_generated = false; |
1da177e4 LT |
2789 | |
2790 | if (pinfo->prefix_len == 64) { | |
2791 | memcpy(&addr, &pinfo->prefix, 8); | |
f53adae4 DB |
2792 | |
2793 | if (!ipv6_addr_any(&in6_dev->token)) { | |
2794 | read_lock_bh(&in6_dev->lock); | |
2795 | memcpy(addr.s6_addr + 8, | |
2796 | in6_dev->token.s6_addr + 8, 8); | |
2797 | read_unlock_bh(&in6_dev->lock); | |
617fe29d | 2798 | tokenized = true; |
cc9da6cc | 2799 | } else if (is_addr_mode_generate_stable(in6_dev) && |
622c81d5 HFS |
2800 | !ipv6_generate_stable_address(&addr, 0, |
2801 | in6_dev)) { | |
64236f3f | 2802 | addr_flags |= IFA_F_STABLE_PRIVACY; |
622c81d5 | 2803 | goto ok; |
f53adae4 DB |
2804 | } else if (ipv6_generate_eui64(addr.s6_addr + 8, dev) && |
2805 | ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) { | |
4f672235 | 2806 | goto put; |
f997c55c AA |
2807 | } else { |
2808 | dev_addr_generated = true; | |
1da177e4 LT |
2809 | } |
2810 | goto ok; | |
2811 | } | |
e87cc472 JP |
2812 | net_dbg_ratelimited("IPv6 addrconf: prefix with wrong length %d\n", |
2813 | pinfo->prefix_len); | |
4f672235 | 2814 | goto put; |
1da177e4 LT |
2815 | |
2816 | ok: | |
4f672235 AA |
2817 | err = addrconf_prefix_rcv_add_addr(net, dev, pinfo, in6_dev, |
2818 | &addr, addr_type, | |
2819 | addr_flags, sllao, | |
2820 | tokenized, valid_lft, | |
2821 | prefered_lft); | |
2822 | if (err) | |
2823 | goto put; | |
f997c55c AA |
2824 | |
2825 | /* Ignore error case here because previous prefix add addr was | |
2826 | * successful which will be notified. | |
2827 | */ | |
2828 | ndisc_ops_prefix_rcv_add_addr(net, dev, pinfo, in6_dev, &addr, | |
2829 | addr_type, addr_flags, sllao, | |
2830 | tokenized, valid_lft, | |
2831 | prefered_lft, | |
2832 | dev_addr_generated); | |
1da177e4 LT |
2833 | } |
2834 | inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo); | |
4f672235 | 2835 | put: |
1da177e4 LT |
2836 | in6_dev_put(in6_dev); |
2837 | } | |
2838 | ||
68ad6886 CH |
2839 | static int addrconf_set_sit_dstaddr(struct net *net, struct net_device *dev, |
2840 | struct in6_ifreq *ireq) | |
2841 | { | |
2842 | struct ip_tunnel_parm p = { }; | |
68ad6886 CH |
2843 | int err; |
2844 | ||
2845 | if (!(ipv6_addr_type(&ireq->ifr6_addr) & IPV6_ADDR_COMPATv4)) | |
2846 | return -EADDRNOTAVAIL; | |
2847 | ||
2848 | p.iph.daddr = ireq->ifr6_addr.s6_addr32[3]; | |
2849 | p.iph.version = 4; | |
2850 | p.iph.ihl = 5; | |
2851 | p.iph.protocol = IPPROTO_IPV6; | |
2852 | p.iph.ttl = 64; | |
68ad6886 | 2853 | |
8e3db0bb | 2854 | if (!dev->netdev_ops->ndo_tunnel_ctl) |
68ad6886 | 2855 | return -EOPNOTSUPP; |
8e3db0bb | 2856 | err = dev->netdev_ops->ndo_tunnel_ctl(dev, &p, SIOCADDTUNNEL); |
68ad6886 CH |
2857 | if (err) |
2858 | return err; | |
2859 | ||
2860 | dev = __dev_get_by_name(net, p.name); | |
2861 | if (!dev) | |
2862 | return -ENOBUFS; | |
2863 | return dev_open(dev, NULL); | |
2864 | } | |
2865 | ||
1da177e4 LT |
2866 | /* |
2867 | * Set destination address. | |
2868 | * Special case for SIT interfaces where we create a new "virtual" | |
2869 | * device. | |
2870 | */ | |
af284937 | 2871 | int addrconf_set_dstaddr(struct net *net, void __user *arg) |
1da177e4 | 2872 | { |
1da177e4 | 2873 | struct net_device *dev; |
68ad6886 CH |
2874 | struct in6_ifreq ireq; |
2875 | int err = -ENODEV; | |
1da177e4 | 2876 | |
f0988460 CH |
2877 | if (!IS_ENABLED(CONFIG_IPV6_SIT)) |
2878 | return -ENODEV; | |
1da177e4 | 2879 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
68ad6886 | 2880 | return -EFAULT; |
1da177e4 | 2881 | |
68ad6886 | 2882 | rtnl_lock(); |
af284937 | 2883 | dev = __dev_get_by_index(net, ireq.ifr6_ifindex); |
68ad6886 CH |
2884 | if (dev && dev->type == ARPHRD_SIT) |
2885 | err = addrconf_set_sit_dstaddr(net, dev, &ireq); | |
1da177e4 LT |
2886 | rtnl_unlock(); |
2887 | return err; | |
2888 | } | |
2889 | ||
93a714d6 MC |
2890 | static int ipv6_mc_config(struct sock *sk, bool join, |
2891 | const struct in6_addr *addr, int ifindex) | |
2892 | { | |
2893 | int ret; | |
2894 | ||
2895 | ASSERT_RTNL(); | |
2896 | ||
2897 | lock_sock(sk); | |
2898 | if (join) | |
54ff9ef3 | 2899 | ret = ipv6_sock_mc_join(sk, ifindex, addr); |
93a714d6 | 2900 | else |
54ff9ef3 | 2901 | ret = ipv6_sock_mc_drop(sk, ifindex, addr); |
93a714d6 MC |
2902 | release_sock(sk); |
2903 | ||
2904 | return ret; | |
2905 | } | |
2906 | ||
1da177e4 LT |
2907 | /* |
2908 | * Manual configuration of address on an interface | |
2909 | */ | |
479840ff | 2910 | static int inet6_addr_add(struct net *net, int ifindex, |
19b1518c | 2911 | struct ifa6_config *cfg, |
de95e047 | 2912 | struct netlink_ext_ack *extack) |
1da177e4 LT |
2913 | { |
2914 | struct inet6_ifaddr *ifp; | |
2915 | struct inet6_dev *idev; | |
2916 | struct net_device *dev; | |
93a714d6 MC |
2917 | unsigned long timeout; |
2918 | clock_t expires; | |
6f704992 | 2919 | u32 flags; |
1da177e4 LT |
2920 | |
2921 | ASSERT_RTNL(); | |
1ab1457c | 2922 | |
19b1518c | 2923 | if (cfg->plen > 128) |
24ef0da7 TG |
2924 | return -EINVAL; |
2925 | ||
0778769d | 2926 | /* check the lifetime */ |
19b1518c | 2927 | if (!cfg->valid_lft || cfg->preferred_lft > cfg->valid_lft) |
0778769d NT |
2928 | return -EINVAL; |
2929 | ||
19b1518c | 2930 | if (cfg->ifa_flags & IFA_F_MANAGETEMPADDR && cfg->plen != 64) |
53bd6749 JP |
2931 | return -EINVAL; |
2932 | ||
af284937 DL |
2933 | dev = __dev_get_by_index(net, ifindex); |
2934 | if (!dev) | |
1da177e4 | 2935 | return -ENODEV; |
1ab1457c | 2936 | |
64e724f6 BH |
2937 | idev = addrconf_add_dev(dev); |
2938 | if (IS_ERR(idev)) | |
2939 | return PTR_ERR(idev); | |
1da177e4 | 2940 | |
19b1518c | 2941 | if (cfg->ifa_flags & IFA_F_MCAUTOJOIN) { |
93a714d6 | 2942 | int ret = ipv6_mc_config(net->ipv6.mc_autojoin_sk, |
19b1518c | 2943 | true, cfg->pfx, ifindex); |
93a714d6 MC |
2944 | |
2945 | if (ret < 0) | |
2946 | return ret; | |
2947 | } | |
2948 | ||
19b1518c | 2949 | cfg->scope = ipv6_addr_scope(cfg->pfx); |
1da177e4 | 2950 | |
19b1518c | 2951 | timeout = addrconf_timeout_fixup(cfg->valid_lft, HZ); |
4bed72e4 YH |
2952 | if (addrconf_finite_timeout(timeout)) { |
2953 | expires = jiffies_to_clock_t(timeout * HZ); | |
19b1518c | 2954 | cfg->valid_lft = timeout; |
6f704992 | 2955 | flags = RTF_EXPIRES; |
4bed72e4 YH |
2956 | } else { |
2957 | expires = 0; | |
2958 | flags = 0; | |
19b1518c | 2959 | cfg->ifa_flags |= IFA_F_PERMANENT; |
6f704992 | 2960 | } |
0778769d | 2961 | |
19b1518c | 2962 | timeout = addrconf_timeout_fixup(cfg->preferred_lft, HZ); |
4bed72e4 YH |
2963 | if (addrconf_finite_timeout(timeout)) { |
2964 | if (timeout == 0) | |
19b1518c DA |
2965 | cfg->ifa_flags |= IFA_F_DEPRECATED; |
2966 | cfg->preferred_lft = timeout; | |
4bed72e4 | 2967 | } |
0778769d | 2968 | |
19b1518c | 2969 | ifp = ipv6_add_addr(idev, cfg, true, extack); |
1da177e4 | 2970 | if (!IS_ERR(ifp)) { |
19b1518c | 2971 | if (!(cfg->ifa_flags & IFA_F_NOPREFIXROUTE)) { |
8308f3ff DA |
2972 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, |
2973 | ifp->rt_priority, dev, expires, | |
2974 | flags, GFP_KERNEL); | |
761aac73 TH |
2975 | } |
2976 | ||
a2d481b3 LB |
2977 | /* Send a netlink notification if DAD is enabled and |
2978 | * optimistic flag is not set | |
2979 | */ | |
2980 | if (!(ifp->flags & (IFA_F_OPTIMISTIC | IFA_F_NODAD))) | |
2981 | ipv6_ifa_notify(0, ifp); | |
95c385b4 NH |
2982 | /* |
2983 | * Note that section 3.1 of RFC 4429 indicates | |
2984 | * that the Optimistic flag should not be set for | |
2985 | * manually configured addresses | |
2986 | */ | |
cf22f9a2 | 2987 | addrconf_dad_start(ifp); |
19b1518c DA |
2988 | if (cfg->ifa_flags & IFA_F_MANAGETEMPADDR) |
2989 | manage_tempaddrs(idev, ifp, cfg->valid_lft, | |
2990 | cfg->preferred_lft, true, jiffies); | |
1da177e4 | 2991 | in6_ifa_put(ifp); |
8805d13f | 2992 | addrconf_verify_rtnl(net); |
1da177e4 | 2993 | return 0; |
19b1518c DA |
2994 | } else if (cfg->ifa_flags & IFA_F_MCAUTOJOIN) { |
2995 | ipv6_mc_config(net->ipv6.mc_autojoin_sk, false, | |
2996 | cfg->pfx, ifindex); | |
1da177e4 LT |
2997 | } |
2998 | ||
2999 | return PTR_ERR(ifp); | |
3000 | } | |
3001 | ||
6046d5b4 HK |
3002 | static int inet6_addr_del(struct net *net, int ifindex, u32 ifa_flags, |
3003 | const struct in6_addr *pfx, unsigned int plen) | |
1da177e4 LT |
3004 | { |
3005 | struct inet6_ifaddr *ifp; | |
3006 | struct inet6_dev *idev; | |
3007 | struct net_device *dev; | |
1ab1457c | 3008 | |
24ef0da7 TG |
3009 | if (plen > 128) |
3010 | return -EINVAL; | |
3011 | ||
af284937 DL |
3012 | dev = __dev_get_by_index(net, ifindex); |
3013 | if (!dev) | |
1da177e4 LT |
3014 | return -ENODEV; |
3015 | ||
e5d08d71 | 3016 | idev = __in6_dev_get(dev); |
63159f29 | 3017 | if (!idev) |
1da177e4 LT |
3018 | return -ENXIO; |
3019 | ||
3020 | read_lock_bh(&idev->lock); | |
502a2ffd | 3021 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
1da177e4 LT |
3022 | if (ifp->prefix_len == plen && |
3023 | ipv6_addr_equal(pfx, &ifp->addr)) { | |
3024 | in6_ifa_hold(ifp); | |
3025 | read_unlock_bh(&idev->lock); | |
1ab1457c | 3026 | |
6046d5b4 HK |
3027 | if (!(ifp->flags & IFA_F_TEMPORARY) && |
3028 | (ifa_flags & IFA_F_MANAGETEMPADDR)) | |
3029 | manage_tempaddrs(idev, ifp, 0, 0, false, | |
3030 | jiffies); | |
1da177e4 | 3031 | ipv6_del_addr(ifp); |
8805d13f | 3032 | addrconf_verify_rtnl(net); |
93a714d6 MC |
3033 | if (ipv6_addr_is_multicast(pfx)) { |
3034 | ipv6_mc_config(net->ipv6.mc_autojoin_sk, | |
3035 | false, pfx, dev->ifindex); | |
3036 | } | |
1da177e4 LT |
3037 | return 0; |
3038 | } | |
3039 | } | |
3040 | read_unlock_bh(&idev->lock); | |
3041 | return -EADDRNOTAVAIL; | |
3042 | } | |
3043 | ||
3044 | ||
af284937 | 3045 | int addrconf_add_ifaddr(struct net *net, void __user *arg) |
1da177e4 | 3046 | { |
19b1518c DA |
3047 | struct ifa6_config cfg = { |
3048 | .ifa_flags = IFA_F_PERMANENT, | |
3049 | .preferred_lft = INFINITY_LIFE_TIME, | |
3050 | .valid_lft = INFINITY_LIFE_TIME, | |
3051 | }; | |
1da177e4 LT |
3052 | struct in6_ifreq ireq; |
3053 | int err; | |
1ab1457c | 3054 | |
af31f412 | 3055 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 | 3056 | return -EPERM; |
1ab1457c | 3057 | |
1da177e4 LT |
3058 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) |
3059 | return -EFAULT; | |
3060 | ||
19b1518c DA |
3061 | cfg.pfx = &ireq.ifr6_addr; |
3062 | cfg.plen = ireq.ifr6_prefixlen; | |
3063 | ||
1da177e4 | 3064 | rtnl_lock(); |
19b1518c | 3065 | err = inet6_addr_add(net, ireq.ifr6_ifindex, &cfg, NULL); |
1da177e4 LT |
3066 | rtnl_unlock(); |
3067 | return err; | |
3068 | } | |
3069 | ||
af284937 | 3070 | int addrconf_del_ifaddr(struct net *net, void __user *arg) |
1da177e4 LT |
3071 | { |
3072 | struct in6_ifreq ireq; | |
3073 | int err; | |
1ab1457c | 3074 | |
af31f412 | 3075 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 LT |
3076 | return -EPERM; |
3077 | ||
3078 | if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) | |
3079 | return -EFAULT; | |
3080 | ||
3081 | rtnl_lock(); | |
6046d5b4 | 3082 | err = inet6_addr_del(net, ireq.ifr6_ifindex, 0, &ireq.ifr6_addr, |
af284937 | 3083 | ireq.ifr6_prefixlen); |
1da177e4 LT |
3084 | rtnl_unlock(); |
3085 | return err; | |
3086 | } | |
3087 | ||
b5f348e5 | 3088 | static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr, |
47f0bd50 | 3089 | int plen, int scope, u8 proto) |
b5f348e5 IJ |
3090 | { |
3091 | struct inet6_ifaddr *ifp; | |
e6464b8c DA |
3092 | struct ifa6_config cfg = { |
3093 | .pfx = addr, | |
3094 | .plen = plen, | |
3095 | .ifa_flags = IFA_F_PERMANENT, | |
3096 | .valid_lft = INFINITY_LIFE_TIME, | |
3097 | .preferred_lft = INFINITY_LIFE_TIME, | |
47f0bd50 JL |
3098 | .scope = scope, |
3099 | .ifa_proto = proto | |
e6464b8c | 3100 | }; |
b5f348e5 | 3101 | |
e6464b8c | 3102 | ifp = ipv6_add_addr(idev, &cfg, true, NULL); |
b5f348e5 IJ |
3103 | if (!IS_ERR(ifp)) { |
3104 | spin_lock_bh(&ifp->lock); | |
3105 | ifp->flags &= ~IFA_F_TENTATIVE; | |
3106 | spin_unlock_bh(&ifp->lock); | |
764d3be6 | 3107 | rt_genid_bump_ipv6(dev_net(idev->dev)); |
b5f348e5 IJ |
3108 | ipv6_ifa_notify(RTM_NEWADDR, ifp); |
3109 | in6_ifa_put(ifp); | |
3110 | } | |
3111 | } | |
3112 | ||
e5dd7294 AQ |
3113 | #if IS_ENABLED(CONFIG_IPV6_SIT) || IS_ENABLED(CONFIG_NET_IPGRE) || IS_ENABLED(CONFIG_IPV6_GRE) |
3114 | static void add_v4_addrs(struct inet6_dev *idev) | |
1da177e4 | 3115 | { |
1da177e4 LT |
3116 | struct in6_addr addr; |
3117 | struct net_device *dev; | |
c346dca1 | 3118 | struct net *net = dev_net(idev->dev); |
e5dd7294 | 3119 | int scope, plen, offset = 0; |
f0e2acfa | 3120 | u32 pflags = 0; |
1da177e4 LT |
3121 | |
3122 | ASSERT_RTNL(); | |
3123 | ||
3124 | memset(&addr, 0, sizeof(struct in6_addr)); | |
e5dd7294 AQ |
3125 | /* in case of IP6GRE the dev_addr is an IPv6 and therefore we use only the last 4 bytes */ |
3126 | if (idev->dev->addr_len == sizeof(struct in6_addr)) | |
3127 | offset = sizeof(struct in6_addr) - 4; | |
3128 | memcpy(&addr.s6_addr32[3], idev->dev->dev_addr + offset, 4); | |
1da177e4 | 3129 | |
30e2291f TW |
3130 | if (!(idev->dev->flags & IFF_POINTOPOINT) && idev->dev->type == ARPHRD_SIT) { |
3131 | scope = IPV6_ADDR_COMPATv4; | |
3132 | plen = 96; | |
3133 | pflags |= RTF_NONEXTHOP; | |
3134 | } else { | |
61e18ce7 SS |
3135 | if (idev->cnf.addr_gen_mode == IN6_ADDR_GEN_MODE_NONE) |
3136 | return; | |
3137 | ||
1da177e4 LT |
3138 | addr.s6_addr32[0] = htonl(0xfe800000); |
3139 | scope = IFA_LINK; | |
929c9cf3 | 3140 | plen = 64; |
1da177e4 LT |
3141 | } |
3142 | ||
3143 | if (addr.s6_addr32[3]) { | |
47f0bd50 | 3144 | add_addr(idev, &addr, plen, scope, IFAPROT_UNSPEC); |
8308f3ff | 3145 | addrconf_prefix_route(&addr, plen, 0, idev->dev, 0, pflags, |
e500c6d3 | 3146 | GFP_KERNEL); |
1da177e4 LT |
3147 | return; |
3148 | } | |
3149 | ||
6fda7350 | 3150 | for_each_netdev(net, dev) { |
8e5e8f30 | 3151 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
1da177e4 | 3152 | if (in_dev && (dev->flags & IFF_UP)) { |
8e5e8f30 | 3153 | struct in_ifaddr *ifa; |
1da177e4 LT |
3154 | int flag = scope; |
3155 | ||
cd5a411d | 3156 | in_dev_for_each_ifa_rtnl(ifa, in_dev) { |
1da177e4 LT |
3157 | addr.s6_addr32[3] = ifa->ifa_local; |
3158 | ||
3159 | if (ifa->ifa_scope == RT_SCOPE_LINK) | |
3160 | continue; | |
3161 | if (ifa->ifa_scope >= RT_SCOPE_HOST) { | |
3162 | if (idev->dev->flags&IFF_POINTOPOINT) | |
3163 | continue; | |
3164 | flag |= IFA_HOST; | |
3165 | } | |
1da177e4 | 3166 | |
47f0bd50 JL |
3167 | add_addr(idev, &addr, plen, flag, |
3168 | IFAPROT_UNSPEC); | |
8308f3ff | 3169 | addrconf_prefix_route(&addr, plen, 0, idev->dev, |
e500c6d3 | 3170 | 0, pflags, GFP_KERNEL); |
1da177e4 LT |
3171 | } |
3172 | } | |
1ab1457c | 3173 | } |
1da177e4 | 3174 | } |
0be669bb | 3175 | #endif |
1da177e4 LT |
3176 | |
3177 | static void init_loopback(struct net_device *dev) | |
3178 | { | |
3179 | struct inet6_dev *idev; | |
1da177e4 LT |
3180 | |
3181 | /* ::1 */ | |
3182 | ||
3183 | ASSERT_RTNL(); | |
3184 | ||
e5d08d71 | 3185 | idev = ipv6_find_idev(dev); |
db0b99f5 | 3186 | if (IS_ERR(idev)) { |
91df42be | 3187 | pr_debug("%s: add_dev failed\n", __func__); |
1da177e4 LT |
3188 | return; |
3189 | } | |
3190 | ||
47f0bd50 | 3191 | add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFAPROT_KERNEL_LO); |
1da177e4 LT |
3192 | } |
3193 | ||
2ad3ed59 AA |
3194 | void addrconf_add_linklocal(struct inet6_dev *idev, |
3195 | const struct in6_addr *addr, u32 flags) | |
1da177e4 | 3196 | { |
e6464b8c DA |
3197 | struct ifa6_config cfg = { |
3198 | .pfx = addr, | |
3199 | .plen = 64, | |
3200 | .ifa_flags = flags | IFA_F_PERMANENT, | |
3201 | .valid_lft = INFINITY_LIFE_TIME, | |
3202 | .preferred_lft = INFINITY_LIFE_TIME, | |
47f0bd50 JL |
3203 | .scope = IFA_LINK, |
3204 | .ifa_proto = IFAPROT_KERNEL_LL | |
e6464b8c | 3205 | }; |
8e5e8f30 | 3206 | struct inet6_ifaddr *ifp; |
95c385b4 NH |
3207 | |
3208 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
35e015e1 MC |
3209 | if ((dev_net(idev->dev)->ipv6.devconf_all->optimistic_dad || |
3210 | idev->cnf.optimistic_dad) && | |
702beb87 | 3211 | !dev_net(idev->dev)->ipv6.devconf_all->forwarding) |
e6464b8c | 3212 | cfg.ifa_flags |= IFA_F_OPTIMISTIC; |
95c385b4 | 3213 | #endif |
1da177e4 | 3214 | |
e6464b8c | 3215 | ifp = ipv6_add_addr(idev, &cfg, true, NULL); |
1da177e4 | 3216 | if (!IS_ERR(ifp)) { |
8308f3ff | 3217 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, 0, idev->dev, |
acb54e3c | 3218 | 0, 0, GFP_ATOMIC); |
cf22f9a2 | 3219 | addrconf_dad_start(ifp); |
1da177e4 LT |
3220 | in6_ifa_put(ifp); |
3221 | } | |
3222 | } | |
2ad3ed59 | 3223 | EXPORT_SYMBOL_GPL(addrconf_add_linklocal); |
1da177e4 | 3224 | |
622c81d5 HFS |
3225 | static bool ipv6_reserved_interfaceid(struct in6_addr address) |
3226 | { | |
3227 | if ((address.s6_addr32[2] | address.s6_addr32[3]) == 0) | |
3228 | return true; | |
3229 | ||
3230 | if (address.s6_addr32[2] == htonl(0x02005eff) && | |
3231 | ((address.s6_addr32[3] & htonl(0xfe000000)) == htonl(0xfe000000))) | |
3232 | return true; | |
3233 | ||
3234 | if (address.s6_addr32[2] == htonl(0xfdffffff) && | |
3235 | ((address.s6_addr32[3] & htonl(0xffffff80)) == htonl(0xffffff80))) | |
3236 | return true; | |
3237 | ||
3238 | return false; | |
3239 | } | |
3240 | ||
3241 | static int ipv6_generate_stable_address(struct in6_addr *address, | |
3242 | u8 dad_count, | |
3243 | const struct inet6_dev *idev) | |
3244 | { | |
622c81d5 | 3245 | static DEFINE_SPINLOCK(lock); |
6b0b0fa2 EB |
3246 | static __u32 digest[SHA1_DIGEST_WORDS]; |
3247 | static __u32 workspace[SHA1_WORKSPACE_WORDS]; | |
622c81d5 HFS |
3248 | |
3249 | static union { | |
6b0b0fa2 | 3250 | char __data[SHA1_BLOCK_SIZE]; |
622c81d5 HFS |
3251 | struct { |
3252 | struct in6_addr secret; | |
ff40217e | 3253 | __be32 prefix[2]; |
622c81d5 HFS |
3254 | unsigned char hwaddr[MAX_ADDR_LEN]; |
3255 | u8 dad_count; | |
3256 | } __packed; | |
3257 | } data; | |
3258 | ||
3259 | struct in6_addr secret; | |
3260 | struct in6_addr temp; | |
3261 | struct net *net = dev_net(idev->dev); | |
3262 | ||
3263 | BUILD_BUG_ON(sizeof(data.__data) != sizeof(data)); | |
3264 | ||
3265 | if (idev->cnf.stable_secret.initialized) | |
3266 | secret = idev->cnf.stable_secret.secret; | |
3267 | else if (net->ipv6.devconf_dflt->stable_secret.initialized) | |
3268 | secret = net->ipv6.devconf_dflt->stable_secret.secret; | |
3269 | else | |
3270 | return -1; | |
3271 | ||
3272 | retry: | |
3273 | spin_lock_bh(&lock); | |
3274 | ||
6b0b0fa2 | 3275 | sha1_init(digest); |
622c81d5 HFS |
3276 | memset(&data, 0, sizeof(data)); |
3277 | memset(workspace, 0, sizeof(workspace)); | |
3278 | memcpy(data.hwaddr, idev->dev->perm_addr, idev->dev->addr_len); | |
ff40217e HFS |
3279 | data.prefix[0] = address->s6_addr32[0]; |
3280 | data.prefix[1] = address->s6_addr32[1]; | |
622c81d5 HFS |
3281 | data.secret = secret; |
3282 | data.dad_count = dad_count; | |
3283 | ||
6b0b0fa2 | 3284 | sha1_transform(digest, data.__data, workspace); |
622c81d5 HFS |
3285 | |
3286 | temp = *address; | |
ff40217e HFS |
3287 | temp.s6_addr32[2] = (__force __be32)digest[0]; |
3288 | temp.s6_addr32[3] = (__force __be32)digest[1]; | |
622c81d5 HFS |
3289 | |
3290 | spin_unlock_bh(&lock); | |
3291 | ||
3292 | if (ipv6_reserved_interfaceid(temp)) { | |
3293 | dad_count++; | |
1855b7c3 | 3294 | if (dad_count > dev_net(idev->dev)->ipv6.sysctl.idgen_retries) |
622c81d5 HFS |
3295 | return -1; |
3296 | goto retry; | |
3297 | } | |
3298 | ||
3299 | *address = temp; | |
3300 | return 0; | |
3301 | } | |
3302 | ||
cc9da6cc BM |
3303 | static void ipv6_gen_mode_random_init(struct inet6_dev *idev) |
3304 | { | |
3305 | struct ipv6_stable_secret *s = &idev->cnf.stable_secret; | |
3306 | ||
3307 | if (s->initialized) | |
3308 | return; | |
3309 | s = &idev->cnf.stable_secret; | |
3310 | get_random_bytes(&s->secret, sizeof(s->secret)); | |
3311 | s->initialized = true; | |
3312 | } | |
3313 | ||
bc91b0f0 JP |
3314 | static void addrconf_addr_gen(struct inet6_dev *idev, bool prefix_route) |
3315 | { | |
622c81d5 HFS |
3316 | struct in6_addr addr; |
3317 | ||
ca254490 DA |
3318 | /* no link local addresses on L3 master devices */ |
3319 | if (netif_is_l3_master(idev->dev)) | |
3320 | return; | |
3321 | ||
744fdc82 | 3322 | /* no link local addresses on devices flagged as slaves */ |
8a321cf7 | 3323 | if (idev->dev->priv_flags & IFF_NO_ADDRCONF) |
744fdc82 JW |
3324 | return; |
3325 | ||
622c81d5 | 3326 | ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0); |
bc91b0f0 | 3327 | |
d35a00b8 | 3328 | switch (idev->cnf.addr_gen_mode) { |
cc9da6cc BM |
3329 | case IN6_ADDR_GEN_MODE_RANDOM: |
3330 | ipv6_gen_mode_random_init(idev); | |
a8eceea8 | 3331 | fallthrough; |
cc9da6cc | 3332 | case IN6_ADDR_GEN_MODE_STABLE_PRIVACY: |
622c81d5 | 3333 | if (!ipv6_generate_stable_address(&addr, 0, idev)) |
64236f3f HFS |
3334 | addrconf_add_linklocal(idev, &addr, |
3335 | IFA_F_STABLE_PRIVACY); | |
622c81d5 | 3336 | else if (prefix_route) |
8308f3ff | 3337 | addrconf_prefix_route(&addr, 64, 0, idev->dev, |
acb54e3c | 3338 | 0, 0, GFP_KERNEL); |
cc9da6cc BM |
3339 | break; |
3340 | case IN6_ADDR_GEN_MODE_EUI64: | |
bc91b0f0 JP |
3341 | /* addrconf_add_linklocal also adds a prefix_route and we |
3342 | * only need to care about prefix routes if ipv6_generate_eui64 | |
3343 | * couldn't generate one. | |
3344 | */ | |
3345 | if (ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) == 0) | |
64236f3f | 3346 | addrconf_add_linklocal(idev, &addr, 0); |
bc91b0f0 | 3347 | else if (prefix_route) |
8308f3ff | 3348 | addrconf_prefix_route(&addr, 64, 0, idev->dev, |
27b10608 | 3349 | 0, 0, GFP_KERNEL); |
cc9da6cc BM |
3350 | break; |
3351 | case IN6_ADDR_GEN_MODE_NONE: | |
3352 | default: | |
3353 | /* will not add any link local address */ | |
3354 | break; | |
bc91b0f0 JP |
3355 | } |
3356 | } | |
3357 | ||
1da177e4 LT |
3358 | static void addrconf_dev_config(struct net_device *dev) |
3359 | { | |
8e5e8f30 | 3360 | struct inet6_dev *idev; |
1da177e4 LT |
3361 | |
3362 | ASSERT_RTNL(); | |
3363 | ||
74235a25 HX |
3364 | if ((dev->type != ARPHRD_ETHER) && |
3365 | (dev->type != ARPHRD_FDDI) && | |
74235a25 | 3366 | (dev->type != ARPHRD_ARCNET) && |
06a4c1c5 | 3367 | (dev->type != ARPHRD_INFINIBAND) && |
e837735e | 3368 | (dev->type != ARPHRD_IEEE1394) && |
e74bccb8 | 3369 | (dev->type != ARPHRD_TUNNEL6) && |
cc9da6cc | 3370 | (dev->type != ARPHRD_6LOWPAN) && |
45ce0fd1 | 3371 | (dev->type != ARPHRD_TUNNEL) && |
9deb441c SAK |
3372 | (dev->type != ARPHRD_NONE) && |
3373 | (dev->type != ARPHRD_RAWIP)) { | |
74235a25 | 3374 | /* Alas, we support only Ethernet autoconfiguration. */ |
60380488 HL |
3375 | idev = __in6_dev_get(dev); |
3376 | if (!IS_ERR_OR_NULL(idev) && dev->flags & IFF_UP && | |
3377 | dev->flags & IFF_MULTICAST) | |
3378 | ipv6_mc_up(idev); | |
74235a25 HX |
3379 | return; |
3380 | } | |
3381 | ||
1da177e4 | 3382 | idev = addrconf_add_dev(dev); |
64e724f6 | 3383 | if (IS_ERR(idev)) |
1da177e4 LT |
3384 | return; |
3385 | ||
cc9da6cc BM |
3386 | /* this device type has no EUI support */ |
3387 | if (dev->type == ARPHRD_NONE && | |
d35a00b8 FJ |
3388 | idev->cnf.addr_gen_mode == IN6_ADDR_GEN_MODE_EUI64) |
3389 | idev->cnf.addr_gen_mode = IN6_ADDR_GEN_MODE_RANDOM; | |
cc9da6cc | 3390 | |
bc91b0f0 | 3391 | addrconf_addr_gen(idev, false); |
1da177e4 LT |
3392 | } |
3393 | ||
07a93626 | 3394 | #if IS_ENABLED(CONFIG_IPV6_SIT) |
1da177e4 LT |
3395 | static void addrconf_sit_config(struct net_device *dev) |
3396 | { | |
3397 | struct inet6_dev *idev; | |
3398 | ||
3399 | ASSERT_RTNL(); | |
3400 | ||
1ab1457c YH |
3401 | /* |
3402 | * Configure the tunnel with one of our IPv4 | |
3403 | * addresses... we should configure all of | |
1da177e4 LT |
3404 | * our v4 addrs in the tunnel |
3405 | */ | |
3406 | ||
e5d08d71 | 3407 | idev = ipv6_find_idev(dev); |
db0b99f5 | 3408 | if (IS_ERR(idev)) { |
91df42be | 3409 | pr_debug("%s: add_dev failed\n", __func__); |
1da177e4 LT |
3410 | return; |
3411 | } | |
3412 | ||
c7dc89c0 | 3413 | if (dev->priv_flags & IFF_ISATAP) { |
bc91b0f0 | 3414 | addrconf_addr_gen(idev, false); |
c7dc89c0 FT |
3415 | return; |
3416 | } | |
3417 | ||
e5dd7294 | 3418 | add_v4_addrs(idev); |
1da177e4 | 3419 | |
62b54dd9 | 3420 | if (dev->flags&IFF_POINTOPOINT) |
1da177e4 | 3421 | addrconf_add_mroute(dev); |
1da177e4 | 3422 | } |
0be669bb | 3423 | #endif |
1da177e4 | 3424 | |
e5dd7294 | 3425 | #if IS_ENABLED(CONFIG_NET_IPGRE) || IS_ENABLED(CONFIG_IPV6_GRE) |
aee80b54 | 3426 | static void addrconf_gre_config(struct net_device *dev) |
3427 | { | |
3428 | struct inet6_dev *idev; | |
aee80b54 | 3429 | |
aee80b54 | 3430 | ASSERT_RTNL(); |
3431 | ||
e5d08d71 | 3432 | idev = ipv6_find_idev(dev); |
db0b99f5 | 3433 | if (IS_ERR(idev)) { |
91df42be | 3434 | pr_debug("%s: add_dev failed\n", __func__); |
aee80b54 | 3435 | return; |
3436 | } | |
3437 | ||
e5dd7294 AQ |
3438 | if (dev->type == ARPHRD_ETHER) { |
3439 | addrconf_addr_gen(idev, true); | |
3440 | return; | |
3441 | } | |
3442 | ||
3443 | add_v4_addrs(idev); | |
3444 | ||
d9e4ce65 HFS |
3445 | if (dev->flags & IFF_POINTOPOINT) |
3446 | addrconf_add_mroute(dev); | |
aee80b54 | 3447 | } |
3448 | #endif | |
3449 | ||
23ca0c2c TW |
3450 | static void addrconf_init_auto_addrs(struct net_device *dev) |
3451 | { | |
3452 | switch (dev->type) { | |
3453 | #if IS_ENABLED(CONFIG_IPV6_SIT) | |
3454 | case ARPHRD_SIT: | |
3455 | addrconf_sit_config(dev); | |
3456 | break; | |
3457 | #endif | |
3458 | #if IS_ENABLED(CONFIG_NET_IPGRE) || IS_ENABLED(CONFIG_IPV6_GRE) | |
3459 | case ARPHRD_IP6GRE: | |
3460 | case ARPHRD_IPGRE: | |
3461 | addrconf_gre_config(dev); | |
3462 | break; | |
3463 | #endif | |
3464 | case ARPHRD_LOOPBACK: | |
3465 | init_loopback(dev); | |
3466 | break; | |
3467 | ||
3468 | default: | |
3469 | addrconf_dev_config(dev); | |
3470 | break; | |
3471 | } | |
3472 | } | |
3473 | ||
afb1d4b5 DA |
3474 | static int fixup_permanent_addr(struct net *net, |
3475 | struct inet6_dev *idev, | |
f1705ec1 DA |
3476 | struct inet6_ifaddr *ifp) |
3477 | { | |
93c2fb25 | 3478 | /* !fib6_node means the host route was removed from the |
8048ced9 DA |
3479 | * FIB, for example, if 'lo' device is taken down. In that |
3480 | * case regenerate the host route. | |
3481 | */ | |
93c2fb25 | 3482 | if (!ifp->rt || !ifp->rt->fib6_node) { |
360a9887 | 3483 | struct fib6_info *f6i, *prev; |
f1705ec1 | 3484 | |
360a9887 DA |
3485 | f6i = addrconf_f6i_alloc(net, idev, &ifp->addr, false, |
3486 | GFP_ATOMIC); | |
3487 | if (IS_ERR(f6i)) | |
3488 | return PTR_ERR(f6i); | |
f1705ec1 | 3489 | |
8048ced9 DA |
3490 | /* ifp->rt can be accessed outside of rtnl */ |
3491 | spin_lock(&ifp->lock); | |
3492 | prev = ifp->rt; | |
360a9887 | 3493 | ifp->rt = f6i; |
8048ced9 DA |
3494 | spin_unlock(&ifp->lock); |
3495 | ||
93531c67 | 3496 | fib6_info_release(prev); |
f1705ec1 DA |
3497 | } |
3498 | ||
3499 | if (!(ifp->flags & IFA_F_NOPREFIXROUTE)) { | |
3500 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, | |
8308f3ff DA |
3501 | ifp->rt_priority, idev->dev, 0, 0, |
3502 | GFP_ATOMIC); | |
f1705ec1 DA |
3503 | } |
3504 | ||
6d717134 DA |
3505 | if (ifp->state == INET6_IFADDR_STATE_PREDAD) |
3506 | addrconf_dad_start(ifp); | |
f1705ec1 DA |
3507 | |
3508 | return 0; | |
3509 | } | |
3510 | ||
afb1d4b5 | 3511 | static void addrconf_permanent_addr(struct net *net, struct net_device *dev) |
f1705ec1 DA |
3512 | { |
3513 | struct inet6_ifaddr *ifp, *tmp; | |
3514 | struct inet6_dev *idev; | |
3515 | ||
3516 | idev = __in6_dev_get(dev); | |
3517 | if (!idev) | |
3518 | return; | |
3519 | ||
3520 | write_lock_bh(&idev->lock); | |
3521 | ||
3522 | list_for_each_entry_safe(ifp, tmp, &idev->addr_list, if_list) { | |
3523 | if ((ifp->flags & IFA_F_PERMANENT) && | |
afb1d4b5 | 3524 | fixup_permanent_addr(net, idev, ifp) < 0) { |
f1705ec1 | 3525 | write_unlock_bh(&idev->lock); |
e669b869 | 3526 | in6_ifa_hold(ifp); |
f1705ec1 DA |
3527 | ipv6_del_addr(ifp); |
3528 | write_lock_bh(&idev->lock); | |
3529 | ||
3530 | net_info_ratelimited("%s: Failed to add prefix route for address %pI6c; dropping\n", | |
3531 | idev->dev->name, &ifp->addr); | |
3532 | } | |
3533 | } | |
3534 | ||
3535 | write_unlock_bh(&idev->lock); | |
3536 | } | |
3537 | ||
1ab1457c | 3538 | static int addrconf_notify(struct notifier_block *this, unsigned long event, |
351638e7 | 3539 | void *ptr) |
1da177e4 | 3540 | { |
351638e7 | 3541 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
896585d4 | 3542 | struct netdev_notifier_change_info *change_info; |
4f7f34ea | 3543 | struct netdev_notifier_changeupper_info *info; |
748e2d93 | 3544 | struct inet6_dev *idev = __in6_dev_get(dev); |
60abc0be | 3545 | struct net *net = dev_net(dev); |
c5e33bdd | 3546 | int run_pending = 0; |
b217d616 | 3547 | int err; |
1da177e4 | 3548 | |
e21e8467 | 3549 | switch (event) { |
45ba9dd2 | 3550 | case NETDEV_REGISTER: |
74235a25 | 3551 | if (!idev && dev->mtu >= IPV6_MIN_MTU) { |
45ba9dd2 | 3552 | idev = ipv6_add_dev(dev); |
a317a2f1 WC |
3553 | if (IS_ERR(idev)) |
3554 | return notifier_from_errno(PTR_ERR(idev)); | |
45ba9dd2 YH |
3555 | } |
3556 | break; | |
bcdd553f | 3557 | |
b7b0b1d2 AD |
3558 | case NETDEV_CHANGEMTU: |
3559 | /* if MTU under IPV6_MIN_MTU stop IPv6 on this interface. */ | |
3560 | if (dev->mtu < IPV6_MIN_MTU) { | |
60abc0be | 3561 | addrconf_ifdown(dev, dev != net->loopback_dev); |
b7b0b1d2 AD |
3562 | break; |
3563 | } | |
3564 | ||
3565 | if (idev) { | |
3566 | rt6_mtu_change(dev, dev->mtu); | |
3567 | idev->cnf.mtu6 = dev->mtu; | |
3568 | break; | |
3569 | } | |
3570 | ||
3571 | /* allocate new idev */ | |
3572 | idev = ipv6_add_dev(dev); | |
3573 | if (IS_ERR(idev)) | |
3574 | break; | |
3575 | ||
3576 | /* device is still not ready */ | |
3577 | if (!(idev->if_flags & IF_READY)) | |
3578 | break; | |
3579 | ||
3580 | run_pending = 1; | |
a8eceea8 | 3581 | fallthrough; |
1da177e4 | 3582 | case NETDEV_UP: |
3c21edbd | 3583 | case NETDEV_CHANGE: |
fd16eb94 | 3584 | if (idev && idev->cnf.disable_ipv6) |
c2edacf8 JV |
3585 | break; |
3586 | ||
8a321cf7 | 3587 | if (dev->priv_flags & IFF_NO_ADDRCONF) { |
fd16eb94 HL |
3588 | if (event == NETDEV_UP && !IS_ERR_OR_NULL(idev) && |
3589 | dev->flags & IFF_UP && dev->flags & IFF_MULTICAST) | |
3590 | ipv6_mc_up(idev); | |
3ce62a84 | 3591 | break; |
fd16eb94 | 3592 | } |
3ce62a84 | 3593 | |
3c21edbd | 3594 | if (event == NETDEV_UP) { |
38bd10c4 | 3595 | /* restore routes for permanent addresses */ |
afb1d4b5 | 3596 | addrconf_permanent_addr(net, dev); |
38bd10c4 | 3597 | |
1f372c7b | 3598 | if (!addrconf_link_ready(dev)) { |
3c21edbd | 3599 | /* device is not ready yet. */ |
7c62b8dd LR |
3600 | pr_debug("ADDRCONF(NETDEV_UP): %s: link is not ready\n", |
3601 | dev->name); | |
3c21edbd YH |
3602 | break; |
3603 | } | |
99081049 | 3604 | |
d31c7b8f EP |
3605 | if (!idev && dev->mtu >= IPV6_MIN_MTU) |
3606 | idev = ipv6_add_dev(dev); | |
3607 | ||
a317a2f1 | 3608 | if (!IS_ERR_OR_NULL(idev)) { |
99081049 | 3609 | idev->if_flags |= IF_READY; |
e3ec6cfc BT |
3610 | run_pending = 1; |
3611 | } | |
b7b0b1d2 | 3612 | } else if (event == NETDEV_CHANGE) { |
1f372c7b | 3613 | if (!addrconf_link_ready(dev)) { |
3c21edbd | 3614 | /* device is still not ready. */ |
27c6fa73 | 3615 | rt6_sync_down_dev(dev, event); |
3c21edbd YH |
3616 | break; |
3617 | } | |
3618 | ||
896585d4 | 3619 | if (!IS_ERR_OR_NULL(idev)) { |
a088d1d7 LL |
3620 | if (idev->if_flags & IF_READY) { |
3621 | /* device is already configured - | |
3622 | * but resend MLD reports, we might | |
3623 | * have roamed and need to update | |
3624 | * multicast snooping switches | |
3625 | */ | |
3626 | ipv6_mc_up(idev); | |
896585d4 HL |
3627 | change_info = ptr; |
3628 | if (change_info->flags_changed & IFF_NOARP) | |
3629 | addrconf_dad_run(idev, true); | |
27c6fa73 | 3630 | rt6_sync_up(dev, RTNH_F_LINKDOWN); |
3c21edbd | 3631 | break; |
a088d1d7 | 3632 | } |
3c21edbd YH |
3633 | idev->if_flags |= IF_READY; |
3634 | } | |
3635 | ||
f69de8aa MB |
3636 | pr_debug("ADDRCONF(NETDEV_CHANGE): %s: link becomes ready\n", |
3637 | dev->name); | |
3c21edbd | 3638 | |
c5e33bdd | 3639 | run_pending = 1; |
3c21edbd YH |
3640 | } |
3641 | ||
23ca0c2c | 3642 | addrconf_init_auto_addrs(dev); |
bcdd553f | 3643 | |
a317a2f1 | 3644 | if (!IS_ERR_OR_NULL(idev)) { |
c5e33bdd | 3645 | if (run_pending) |
896585d4 | 3646 | addrconf_dad_run(idev, false); |
c5e33bdd | 3647 | |
2127d95a IS |
3648 | /* Device has an address by now */ |
3649 | rt6_sync_up(dev, RTNH_F_DEAD); | |
3650 | ||
bcdd553f SH |
3651 | /* |
3652 | * If the MTU changed during the interface down, | |
3653 | * when the interface up, the changed MTU must be | |
3654 | * reflected in the idev as well as routers. | |
1da177e4 | 3655 | */ |
bcdd553f SH |
3656 | if (idev->cnf.mtu6 != dev->mtu && |
3657 | dev->mtu >= IPV6_MIN_MTU) { | |
1da177e4 LT |
3658 | rt6_mtu_change(dev, dev->mtu); |
3659 | idev->cnf.mtu6 = dev->mtu; | |
3660 | } | |
3661 | idev->tstamp = jiffies; | |
3662 | inet6_ifinfo_notify(RTM_NEWLINK, idev); | |
bcdd553f SH |
3663 | |
3664 | /* | |
3665 | * If the changed mtu during down is lower than | |
3666 | * IPV6_MIN_MTU stop IPv6 on this interface. | |
1da177e4 LT |
3667 | */ |
3668 | if (dev->mtu < IPV6_MIN_MTU) | |
60abc0be | 3669 | addrconf_ifdown(dev, dev != net->loopback_dev); |
1da177e4 LT |
3670 | } |
3671 | break; | |
3672 | ||
1da177e4 LT |
3673 | case NETDEV_DOWN: |
3674 | case NETDEV_UNREGISTER: | |
3675 | /* | |
3676 | * Remove all addresses from this interface. | |
3677 | */ | |
3678 | addrconf_ifdown(dev, event != NETDEV_DOWN); | |
3679 | break; | |
3c21edbd | 3680 | |
1da177e4 | 3681 | case NETDEV_CHANGENAME: |
1da177e4 | 3682 | if (idev) { |
5632c515 | 3683 | snmp6_unregister_dev(idev); |
408c4768 | 3684 | addrconf_sysctl_unregister(idev); |
a317a2f1 | 3685 | err = addrconf_sysctl_register(idev); |
b217d616 HX |
3686 | if (err) |
3687 | return notifier_from_errno(err); | |
a317a2f1 WC |
3688 | err = snmp6_register_dev(idev); |
3689 | if (err) { | |
3690 | addrconf_sysctl_unregister(idev); | |
3691 | return notifier_from_errno(err); | |
3692 | } | |
5632c515 | 3693 | } |
1da177e4 | 3694 | break; |
bcdd553f | 3695 | |
93d9b7d7 JP |
3696 | case NETDEV_PRE_TYPE_CHANGE: |
3697 | case NETDEV_POST_TYPE_CHANGE: | |
3ef0952c AL |
3698 | if (idev) |
3699 | addrconf_type_change(dev, event); | |
75c78500 | 3700 | break; |
4f7f34ea DA |
3701 | |
3702 | case NETDEV_CHANGEUPPER: | |
3703 | info = ptr; | |
3704 | ||
3705 | /* flush all routes if dev is linked to or unlinked from | |
3706 | * an L3 master device (e.g., VRF) | |
3707 | */ | |
3708 | if (info->upper_dev && netif_is_l3_master(info->upper_dev)) | |
ae79dbf6 | 3709 | addrconf_ifdown(dev, false); |
3ff50b79 | 3710 | } |
1da177e4 LT |
3711 | |
3712 | return NOTIFY_OK; | |
3713 | } | |
3714 | ||
3715 | /* | |
3716 | * addrconf module should be notified of a device going up | |
3717 | */ | |
3718 | static struct notifier_block ipv6_dev_notf = { | |
3719 | .notifier_call = addrconf_notify, | |
242d3a49 | 3720 | .priority = ADDRCONF_NOTIFY_PRIORITY, |
1da177e4 LT |
3721 | }; |
3722 | ||
93d9b7d7 | 3723 | static void addrconf_type_change(struct net_device *dev, unsigned long event) |
75c78500 MS |
3724 | { |
3725 | struct inet6_dev *idev; | |
3726 | ASSERT_RTNL(); | |
3727 | ||
3728 | idev = __in6_dev_get(dev); | |
3729 | ||
93d9b7d7 | 3730 | if (event == NETDEV_POST_TYPE_CHANGE) |
75c78500 | 3731 | ipv6_mc_remap(idev); |
93d9b7d7 | 3732 | else if (event == NETDEV_PRE_TYPE_CHANGE) |
75c78500 MS |
3733 | ipv6_mc_unmap(idev); |
3734 | } | |
3735 | ||
70af921d DA |
3736 | static bool addr_is_local(const struct in6_addr *addr) |
3737 | { | |
3738 | return ipv6_addr_type(addr) & | |
3739 | (IPV6_ADDR_LINKLOCAL | IPV6_ADDR_LOOPBACK); | |
3740 | } | |
3741 | ||
ae79dbf6 | 3742 | static int addrconf_ifdown(struct net_device *dev, bool unregister) |
1da177e4 | 3743 | { |
ae79dbf6 | 3744 | unsigned long event = unregister ? NETDEV_UNREGISTER : NETDEV_DOWN; |
c346dca1 | 3745 | struct net *net = dev_net(dev); |
502a2ffd | 3746 | struct inet6_dev *idev; |
51454ea4 ND |
3747 | struct inet6_ifaddr *ifa; |
3748 | LIST_HEAD(tmp_addr_list); | |
0aef78aa | 3749 | bool keep_addr = false; |
9995b408 | 3750 | bool was_ready; |
73a8bd74 | 3751 | int state, i; |
1da177e4 LT |
3752 | |
3753 | ASSERT_RTNL(); | |
3754 | ||
4c981e28 | 3755 | rt6_disable_ip(dev, event); |
1da177e4 LT |
3756 | |
3757 | idev = __in6_dev_get(dev); | |
63159f29 | 3758 | if (!idev) |
1da177e4 LT |
3759 | return -ENODEV; |
3760 | ||
bcdd553f SH |
3761 | /* |
3762 | * Step 1: remove reference to ipv6 device from parent device. | |
3763 | * Do not dev_put! | |
1da177e4 | 3764 | */ |
ae79dbf6 | 3765 | if (unregister) { |
1da177e4 | 3766 | idev->dead = 1; |
8814c4b5 YH |
3767 | |
3768 | /* protected by rtnl_lock */ | |
a9b3cd7f | 3769 | RCU_INIT_POINTER(dev->ip6_ptr, NULL); |
1da177e4 LT |
3770 | |
3771 | /* Step 1.5: remove snmp6 entry */ | |
3772 | snmp6_unregister_dev(idev); | |
3773 | ||
3774 | } | |
3775 | ||
f1705ec1 DA |
3776 | /* combine the user config with event to determine if permanent |
3777 | * addresses are to be removed from address hash table | |
3778 | */ | |
ae79dbf6 | 3779 | if (!unregister && !idev->cnf.disable_ipv6) { |
0aef78aa IV |
3780 | /* aggregate the system setting and interface setting */ |
3781 | int _keep_addr = net->ipv6.devconf_all->keep_addr_on_down; | |
3782 | ||
3783 | if (!_keep_addr) | |
3784 | _keep_addr = idev->cnf.keep_addr_on_down; | |
3785 | ||
3786 | keep_addr = (_keep_addr > 0); | |
3787 | } | |
f1705ec1 | 3788 | |
73a8bd74 DM |
3789 | /* Step 2: clear hash table */ |
3790 | for (i = 0; i < IN6_ADDR_HSIZE; i++) { | |
e66d1172 | 3791 | struct hlist_head *h = &net->ipv6.inet6_addr_lst[i]; |
73a8bd74 | 3792 | |
e66d1172 | 3793 | spin_lock_bh(&net->ipv6.addrconf_hash_lock); |
67ba4152 | 3794 | restart: |
b67bfe0d | 3795 | hlist_for_each_entry_rcu(ifa, h, addr_lst) { |
73a8bd74 | 3796 | if (ifa->idev == idev) { |
c15b1cca | 3797 | addrconf_del_dad_work(ifa); |
f1705ec1 DA |
3798 | /* combined flag + permanent flag decide if |
3799 | * address is retained on a down event | |
3800 | */ | |
3801 | if (!keep_addr || | |
70af921d DA |
3802 | !(ifa->flags & IFA_F_PERMANENT) || |
3803 | addr_is_local(&ifa->addr)) { | |
f1705ec1 DA |
3804 | hlist_del_init_rcu(&ifa->addr_lst); |
3805 | goto restart; | |
3806 | } | |
73a8bd74 DM |
3807 | } |
3808 | } | |
e66d1172 | 3809 | spin_unlock_bh(&net->ipv6.addrconf_hash_lock); |
73a8bd74 DM |
3810 | } |
3811 | ||
1da177e4 LT |
3812 | write_lock_bh(&idev->lock); |
3813 | ||
b7b1bfce HFS |
3814 | addrconf_del_rs_timer(idev); |
3815 | ||
9995b408 | 3816 | /* Step 2: clear flags for stateless addrconf, repeated down |
3817 | * detection | |
3818 | */ | |
3819 | was_ready = idev->if_flags & IF_READY; | |
ae79dbf6 | 3820 | if (!unregister) |
3c21edbd | 3821 | idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY); |
1da177e4 | 3822 | |
bcdd553f | 3823 | /* Step 3: clear tempaddr list */ |
372e6c8f | 3824 | while (!list_empty(&idev->tempaddr_list)) { |
3825 | ifa = list_first_entry(&idev->tempaddr_list, | |
3826 | struct inet6_ifaddr, tmp_list); | |
3827 | list_del(&ifa->tmp_list); | |
1da177e4 LT |
3828 | write_unlock_bh(&idev->lock); |
3829 | spin_lock_bh(&ifa->lock); | |
3830 | ||
3831 | if (ifa->ifpub) { | |
3832 | in6_ifa_put(ifa->ifpub); | |
3833 | ifa->ifpub = NULL; | |
3834 | } | |
3835 | spin_unlock_bh(&ifa->lock); | |
3836 | in6_ifa_put(ifa); | |
3837 | write_lock_bh(&idev->lock); | |
3838 | } | |
8f37ada5 | 3839 | |
51454ea4 ND |
3840 | list_for_each_entry(ifa, &idev->addr_list, if_list) |
3841 | list_add_tail(&ifa->if_list_aux, &tmp_addr_list); | |
3842 | write_unlock_bh(&idev->lock); | |
3843 | ||
3844 | while (!list_empty(&tmp_addr_list)) { | |
8d1c802b | 3845 | struct fib6_info *rt = NULL; |
a2d6cbb0 | 3846 | bool keep; |
38bd10c4 | 3847 | |
51454ea4 ND |
3848 | ifa = list_first_entry(&tmp_addr_list, |
3849 | struct inet6_ifaddr, if_list_aux); | |
3850 | list_del(&ifa->if_list_aux); | |
3851 | ||
f1705ec1 | 3852 | addrconf_del_dad_work(ifa); |
84e8b803 | 3853 | |
a2d6cbb0 RV |
3854 | keep = keep_addr && (ifa->flags & IFA_F_PERMANENT) && |
3855 | !addr_is_local(&ifa->addr); | |
a2d6cbb0 | 3856 | |
8e8e676d | 3857 | spin_lock_bh(&ifa->lock); |
f1705ec1 | 3858 | |
a2d6cbb0 | 3859 | if (keep) { |
f1705ec1 DA |
3860 | /* set state to skip the notifier below */ |
3861 | state = INET6_IFADDR_STATE_DEAD; | |
6d717134 | 3862 | ifa->state = INET6_IFADDR_STATE_PREDAD; |
f1705ec1 DA |
3863 | if (!(ifa->flags & IFA_F_NODAD)) |
3864 | ifa->flags |= IFA_F_TENTATIVE; | |
38bd10c4 DA |
3865 | |
3866 | rt = ifa->rt; | |
3867 | ifa->rt = NULL; | |
f1705ec1 DA |
3868 | } else { |
3869 | state = ifa->state; | |
3870 | ifa->state = INET6_IFADDR_STATE_DEAD; | |
f1705ec1 DA |
3871 | } |
3872 | ||
8e8e676d | 3873 | spin_unlock_bh(&ifa->lock); |
9d82ca98 | 3874 | |
38bd10c4 | 3875 | if (rt) |
11dd74b3 | 3876 | ip6_del_rt(net, rt, false); |
38bd10c4 | 3877 | |
73a8bd74 DM |
3878 | if (state != INET6_IFADDR_STATE_DEAD) { |
3879 | __ipv6_ifa_notify(RTM_DELADDR, ifa); | |
f88c91dd | 3880 | inet6addr_notifier_call_chain(NETDEV_DOWN, ifa); |
ea06f717 MM |
3881 | } else { |
3882 | if (idev->cnf.forwarding) | |
3883 | addrconf_leave_anycast(ifa); | |
3884 | addrconf_leave_solict(ifa->idev, &ifa->addr); | |
27bdb2ab | 3885 | } |
8f37ada5 | 3886 | |
8ef802aa | 3887 | if (!keep) { |
51454ea4 | 3888 | write_lock_bh(&idev->lock); |
8ef802aa | 3889 | list_del_rcu(&ifa->if_list); |
51454ea4 | 3890 | write_unlock_bh(&idev->lock); |
8ef802aa ED |
3891 | in6_ifa_put(ifa); |
3892 | } | |
73a8bd74 | 3893 | } |
8f37ada5 | 3894 | |
381f4dca | 3895 | /* Step 5: Discard anycast and multicast list */ |
ae79dbf6 | 3896 | if (unregister) { |
381f4dca | 3897 | ipv6_ac_destroy_dev(idev); |
1da177e4 | 3898 | ipv6_mc_destroy_dev(idev); |
9995b408 | 3899 | } else if (was_ready) { |
1da177e4 | 3900 | ipv6_mc_down(idev); |
381f4dca | 3901 | } |
1da177e4 | 3902 | |
1da177e4 | 3903 | idev->tstamp = jiffies; |
49b99da2 | 3904 | idev->ra_mtu = 0; |
1ab1457c | 3905 | |
bcdd553f | 3906 | /* Last: Shot the device (if unregistered) */ |
ae79dbf6 | 3907 | if (unregister) { |
408c4768 | 3908 | addrconf_sysctl_unregister(idev); |
1da177e4 LT |
3909 | neigh_parms_release(&nd_tbl, idev->nd_parms); |
3910 | neigh_ifdown(&nd_tbl, dev); | |
3911 | in6_dev_put(idev); | |
3912 | } | |
3913 | return 0; | |
3914 | } | |
3915 | ||
e99e88a9 | 3916 | static void addrconf_rs_timer(struct timer_list *t) |
1da177e4 | 3917 | { |
e99e88a9 | 3918 | struct inet6_dev *idev = from_timer(idev, t, rs_timer); |
caf92bc4 | 3919 | struct net_device *dev = idev->dev; |
b7b1bfce | 3920 | struct in6_addr lladdr; |
1da177e4 | 3921 | |
b7b1bfce | 3922 | write_lock(&idev->lock); |
5b2a1953 | 3923 | if (idev->dead || !(idev->if_flags & IF_READY)) |
1da177e4 LT |
3924 | goto out; |
3925 | ||
9ba2add3 | 3926 | if (!ipv6_accept_ra(idev)) |
5b2a1953 | 3927 | goto out; |
3928 | ||
3929 | /* Announcement received after solicitation was sent */ | |
3930 | if (idev->if_flags & IF_RA_RCVD) | |
1da177e4 | 3931 | goto out; |
1da177e4 | 3932 | |
bd11f074 | 3933 | if (idev->rs_probes++ < idev->cnf.rtr_solicits || idev->cnf.rtr_solicits < 0) { |
caf92bc4 CW |
3934 | write_unlock(&idev->lock); |
3935 | if (!ipv6_get_lladdr(dev, &lladdr, IFA_F_TENTATIVE)) | |
3936 | ndisc_send_rs(dev, &lladdr, | |
b7b1bfce HFS |
3937 | &in6addr_linklocal_allrouters); |
3938 | else | |
caf92bc4 | 3939 | goto put; |
1da177e4 | 3940 | |
caf92bc4 | 3941 | write_lock(&idev->lock); |
bd11f074 MŻ |
3942 | idev->rs_interval = rfc3315_s14_backoff_update( |
3943 | idev->rs_interval, idev->cnf.rtr_solicit_max_interval); | |
b7b1bfce HFS |
3944 | /* The wait after the last probe can be shorter */ |
3945 | addrconf_mod_rs_timer(idev, (idev->rs_probes == | |
3946 | idev->cnf.rtr_solicits) ? | |
3947 | idev->cnf.rtr_solicit_delay : | |
bd11f074 | 3948 | idev->rs_interval); |
1da177e4 | 3949 | } else { |
1da177e4 LT |
3950 | /* |
3951 | * Note: we do not support deprecated "all on-link" | |
3952 | * assumption any longer. | |
3953 | */ | |
91df42be | 3954 | pr_debug("%s: no IPv6 routers present\n", idev->dev->name); |
1da177e4 LT |
3955 | } |
3956 | ||
3957 | out: | |
b7b1bfce | 3958 | write_unlock(&idev->lock); |
caf92bc4 | 3959 | put: |
b7b1bfce | 3960 | in6_dev_put(idev); |
1da177e4 LT |
3961 | } |
3962 | ||
3963 | /* | |
3964 | * Duplicate Address Detection | |
3965 | */ | |
3c21edbd YH |
3966 | static void addrconf_dad_kick(struct inet6_ifaddr *ifp) |
3967 | { | |
3968 | unsigned long rand_num; | |
3969 | struct inet6_dev *idev = ifp->idev; | |
adc176c5 | 3970 | u64 nonce; |
3c21edbd | 3971 | |
95c385b4 NH |
3972 | if (ifp->flags & IFA_F_OPTIMISTIC) |
3973 | rand_num = 0; | |
3974 | else | |
8032bf12 | 3975 | rand_num = get_random_u32_below(idev->cnf.rtr_solicit_delay ? : 1); |
95c385b4 | 3976 | |
adc176c5 EN |
3977 | nonce = 0; |
3978 | if (idev->cnf.enhanced_dad || | |
3979 | dev_net(idev->dev)->ipv6.devconf_all->enhanced_dad) { | |
3980 | do | |
3981 | get_random_bytes(&nonce, 6); | |
3982 | while (nonce == 0); | |
3983 | } | |
3984 | ifp->dad_nonce = nonce; | |
b7b1bfce | 3985 | ifp->dad_probes = idev->cnf.dad_transmits; |
c15b1cca | 3986 | addrconf_mod_dad_work(ifp, rand_num); |
3c21edbd YH |
3987 | } |
3988 | ||
c15b1cca | 3989 | static void addrconf_dad_begin(struct inet6_ifaddr *ifp) |
1da177e4 LT |
3990 | { |
3991 | struct inet6_dev *idev = ifp->idev; | |
3992 | struct net_device *dev = idev->dev; | |
764d3be6 | 3993 | bool bump_id, notify = false; |
afb1d4b5 | 3994 | struct net *net; |
1da177e4 LT |
3995 | |
3996 | addrconf_join_solict(dev, &ifp->addr); | |
3997 | ||
1da177e4 | 3998 | read_lock_bh(&idev->lock); |
622ccdf1 | 3999 | spin_lock(&ifp->lock); |
e9d3e084 | 4000 | if (ifp->state == INET6_IFADDR_STATE_DEAD) |
1da177e4 | 4001 | goto out; |
1da177e4 | 4002 | |
afb1d4b5 | 4003 | net = dev_net(dev); |
1da177e4 | 4004 | if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || |
afb1d4b5 | 4005 | (net->ipv6.devconf_all->accept_dad < 1 && |
a2d3f3e3 | 4006 | idev->cnf.accept_dad < 1) || |
55ebaef1 NT |
4007 | !(ifp->flags&IFA_F_TENTATIVE) || |
4008 | ifp->flags & IFA_F_NODAD) { | |
c76fe2d9 DA |
4009 | bool send_na = false; |
4010 | ||
4011 | if (ifp->flags & IFA_F_TENTATIVE && | |
4012 | !(ifp->flags & IFA_F_OPTIMISTIC)) | |
4013 | send_na = true; | |
764d3be6 | 4014 | bump_id = ifp->flags & IFA_F_TENTATIVE; |
cc411d0b | 4015 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
21809faf | 4016 | spin_unlock(&ifp->lock); |
1da177e4 LT |
4017 | read_unlock_bh(&idev->lock); |
4018 | ||
c76fe2d9 | 4019 | addrconf_dad_completed(ifp, bump_id, send_na); |
1da177e4 LT |
4020 | return; |
4021 | } | |
4022 | ||
6732bade | 4023 | if (!(idev->if_flags & IF_READY)) { |
21809faf | 4024 | spin_unlock(&ifp->lock); |
6732bade | 4025 | read_unlock_bh(&idev->lock); |
3c21edbd | 4026 | /* |
590a9887 | 4027 | * If the device is not ready: |
3c21edbd YH |
4028 | * - keep it tentative if it is a permanent address. |
4029 | * - otherwise, kill it. | |
4030 | */ | |
4031 | in6_ifa_hold(ifp); | |
cc411d0b | 4032 | addrconf_dad_stop(ifp, 0); |
6732bade | 4033 | return; |
3c21edbd | 4034 | } |
95c385b4 NH |
4035 | |
4036 | /* | |
4037 | * Optimistic nodes can start receiving | |
4038 | * Frames right away | |
4039 | */ | |
7fd2561e | 4040 | if (ifp->flags & IFA_F_OPTIMISTIC) { |
afb1d4b5 DA |
4041 | ip6_ins_rt(net, ifp->rt); |
4042 | if (ipv6_use_optimistic_addr(net, idev)) { | |
7fd2561e EK |
4043 | /* Because optimistic nodes can use this address, |
4044 | * notify listeners. If DAD fails, RTM_DELADDR is sent. | |
4045 | */ | |
16186a82 | 4046 | notify = true; |
7fd2561e EK |
4047 | } |
4048 | } | |
95c385b4 | 4049 | |
6732bade | 4050 | addrconf_dad_kick(ifp); |
1da177e4 | 4051 | out: |
622ccdf1 | 4052 | spin_unlock(&ifp->lock); |
1da177e4 | 4053 | read_unlock_bh(&idev->lock); |
16186a82 | 4054 | if (notify) |
4055 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
1da177e4 LT |
4056 | } |
4057 | ||
c15b1cca | 4058 | static void addrconf_dad_start(struct inet6_ifaddr *ifp) |
1da177e4 | 4059 | { |
c15b1cca HFS |
4060 | bool begin_dad = false; |
4061 | ||
8e8e676d | 4062 | spin_lock_bh(&ifp->lock); |
c15b1cca HFS |
4063 | if (ifp->state != INET6_IFADDR_STATE_DEAD) { |
4064 | ifp->state = INET6_IFADDR_STATE_PREDAD; | |
4065 | begin_dad = true; | |
4066 | } | |
8e8e676d | 4067 | spin_unlock_bh(&ifp->lock); |
c15b1cca HFS |
4068 | |
4069 | if (begin_dad) | |
4070 | addrconf_mod_dad_work(ifp, 0); | |
4071 | } | |
4072 | ||
4073 | static void addrconf_dad_work(struct work_struct *w) | |
4074 | { | |
4075 | struct inet6_ifaddr *ifp = container_of(to_delayed_work(w), | |
4076 | struct inet6_ifaddr, | |
4077 | dad_work); | |
1da177e4 | 4078 | struct inet6_dev *idev = ifp->idev; |
764d3be6 | 4079 | bool bump_id, disable_ipv6 = false; |
1da177e4 LT |
4080 | struct in6_addr mcaddr; |
4081 | ||
c15b1cca HFS |
4082 | enum { |
4083 | DAD_PROCESS, | |
4084 | DAD_BEGIN, | |
4085 | DAD_ABORT, | |
4086 | } action = DAD_PROCESS; | |
4087 | ||
4088 | rtnl_lock(); | |
4089 | ||
8e8e676d | 4090 | spin_lock_bh(&ifp->lock); |
c15b1cca HFS |
4091 | if (ifp->state == INET6_IFADDR_STATE_PREDAD) { |
4092 | action = DAD_BEGIN; | |
4093 | ifp->state = INET6_IFADDR_STATE_DAD; | |
4094 | } else if (ifp->state == INET6_IFADDR_STATE_ERRDAD) { | |
4095 | action = DAD_ABORT; | |
4096 | ifp->state = INET6_IFADDR_STATE_POSTDAD; | |
85b51b12 | 4097 | |
35e015e1 MC |
4098 | if ((dev_net(idev->dev)->ipv6.devconf_all->accept_dad > 1 || |
4099 | idev->cnf.accept_dad > 1) && | |
4100 | !idev->cnf.disable_ipv6 && | |
85b51b12 MM |
4101 | !(ifp->flags & IFA_F_STABLE_PRIVACY)) { |
4102 | struct in6_addr addr; | |
4103 | ||
4104 | addr.s6_addr32[0] = htonl(0xfe800000); | |
4105 | addr.s6_addr32[1] = 0; | |
4106 | ||
4107 | if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) && | |
4108 | ipv6_addr_equal(&ifp->addr, &addr)) { | |
4109 | /* DAD failed for link-local based on MAC */ | |
4110 | idev->cnf.disable_ipv6 = 1; | |
4111 | ||
4112 | pr_info("%s: IPv6 being disabled!\n", | |
4113 | ifp->idev->dev->name); | |
4114 | disable_ipv6 = true; | |
4115 | } | |
4116 | } | |
c15b1cca | 4117 | } |
8e8e676d | 4118 | spin_unlock_bh(&ifp->lock); |
c15b1cca HFS |
4119 | |
4120 | if (action == DAD_BEGIN) { | |
4121 | addrconf_dad_begin(ifp); | |
4122 | goto out; | |
4123 | } else if (action == DAD_ABORT) { | |
751eb6b6 | 4124 | in6_ifa_hold(ifp); |
c15b1cca | 4125 | addrconf_dad_stop(ifp, 1); |
85b51b12 | 4126 | if (disable_ipv6) |
ae79dbf6 | 4127 | addrconf_ifdown(idev->dev, false); |
c15b1cca HFS |
4128 | goto out; |
4129 | } | |
4130 | ||
b7b1bfce | 4131 | if (!ifp->dad_probes && addrconf_dad_end(ifp)) |
f2344a13 HX |
4132 | goto out; |
4133 | ||
c15b1cca | 4134 | write_lock_bh(&idev->lock); |
122e4519 | 4135 | if (idev->dead || !(idev->if_flags & IF_READY)) { |
c15b1cca | 4136 | write_unlock_bh(&idev->lock); |
1da177e4 LT |
4137 | goto out; |
4138 | } | |
21809faf | 4139 | |
4140 | spin_lock(&ifp->lock); | |
622ccdf1 HX |
4141 | if (ifp->state == INET6_IFADDR_STATE_DEAD) { |
4142 | spin_unlock(&ifp->lock); | |
c15b1cca | 4143 | write_unlock_bh(&idev->lock); |
622ccdf1 HX |
4144 | goto out; |
4145 | } | |
4146 | ||
b7b1bfce | 4147 | if (ifp->dad_probes == 0) { |
c76fe2d9 DA |
4148 | bool send_na = false; |
4149 | ||
1da177e4 LT |
4150 | /* |
4151 | * DAD was successful | |
4152 | */ | |
4153 | ||
c76fe2d9 DA |
4154 | if (ifp->flags & IFA_F_TENTATIVE && |
4155 | !(ifp->flags & IFA_F_OPTIMISTIC)) | |
4156 | send_na = true; | |
764d3be6 | 4157 | bump_id = ifp->flags & IFA_F_TENTATIVE; |
cc411d0b | 4158 | ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED); |
21809faf | 4159 | spin_unlock(&ifp->lock); |
c15b1cca | 4160 | write_unlock_bh(&idev->lock); |
1da177e4 | 4161 | |
c76fe2d9 | 4162 | addrconf_dad_completed(ifp, bump_id, send_na); |
1da177e4 LT |
4163 | |
4164 | goto out; | |
4165 | } | |
4166 | ||
b7b1bfce | 4167 | ifp->dad_probes--; |
c15b1cca | 4168 | addrconf_mod_dad_work(ifp, |
19e16d22 HL |
4169 | max(NEIGH_VAR(ifp->idev->nd_parms, RETRANS_TIME), |
4170 | HZ/100)); | |
21809faf | 4171 | spin_unlock(&ifp->lock); |
c15b1cca | 4172 | write_unlock_bh(&idev->lock); |
1da177e4 LT |
4173 | |
4174 | /* send a neighbour solicitation for our addr */ | |
1da177e4 | 4175 | addrconf_addr_solict_mult(&ifp->addr, &mcaddr); |
adc176c5 EN |
4176 | ndisc_send_ns(ifp->idev->dev, &ifp->addr, &mcaddr, &in6addr_any, |
4177 | ifp->dad_nonce); | |
1da177e4 LT |
4178 | out: |
4179 | in6_ifa_put(ifp); | |
c15b1cca | 4180 | rtnl_unlock(); |
1da177e4 LT |
4181 | } |
4182 | ||
11ffff75 HFS |
4183 | /* ifp->idev must be at least read locked */ |
4184 | static bool ipv6_lonely_lladdr(struct inet6_ifaddr *ifp) | |
4185 | { | |
4186 | struct inet6_ifaddr *ifpiter; | |
4187 | struct inet6_dev *idev = ifp->idev; | |
4188 | ||
602582ca HFS |
4189 | list_for_each_entry_reverse(ifpiter, &idev->addr_list, if_list) { |
4190 | if (ifpiter->scope > IFA_LINK) | |
4191 | break; | |
11ffff75 HFS |
4192 | if (ifp != ifpiter && ifpiter->scope == IFA_LINK && |
4193 | (ifpiter->flags & (IFA_F_PERMANENT|IFA_F_TENTATIVE| | |
4194 | IFA_F_OPTIMISTIC|IFA_F_DADFAILED)) == | |
4195 | IFA_F_PERMANENT) | |
4196 | return false; | |
4197 | } | |
4198 | return true; | |
4199 | } | |
4200 | ||
c76fe2d9 DA |
4201 | static void addrconf_dad_completed(struct inet6_ifaddr *ifp, bool bump_id, |
4202 | bool send_na) | |
1da177e4 | 4203 | { |
e21e8467 | 4204 | struct net_device *dev = ifp->idev->dev; |
b7b1bfce | 4205 | struct in6_addr lladdr; |
b173ee48 | 4206 | bool send_rs, send_mld; |
b7b1bfce | 4207 | |
c15b1cca | 4208 | addrconf_del_dad_work(ifp); |
1da177e4 LT |
4209 | |
4210 | /* | |
4211 | * Configure the address for reception. Now it is valid. | |
4212 | */ | |
4213 | ||
4214 | ipv6_ifa_notify(RTM_NEWADDR, ifp); | |
4215 | ||
026359bc TA |
4216 | /* If added prefix is link local and we are prepared to process |
4217 | router advertisements, start sending router solicitations. | |
1da177e4 LT |
4218 | */ |
4219 | ||
1ec047eb | 4220 | read_lock_bh(&ifp->idev->lock); |
11ffff75 | 4221 | send_mld = ifp->scope == IFA_LINK && ipv6_lonely_lladdr(ifp); |
b173ee48 HFS |
4222 | send_rs = send_mld && |
4223 | ipv6_accept_ra(ifp->idev) && | |
bd11f074 | 4224 | ifp->idev->cnf.rtr_solicits != 0 && |
b52e1cce | 4225 | (dev->flags & IFF_LOOPBACK) == 0 && |
2df9bf4d XL |
4226 | (dev->type != ARPHRD_TUNNEL) && |
4227 | !netif_is_team_port(dev); | |
1ec047eb HFS |
4228 | read_unlock_bh(&ifp->idev->lock); |
4229 | ||
b173ee48 HFS |
4230 | /* While dad is in progress mld report's source address is in6_addrany. |
4231 | * Resend with proper ll now. | |
4232 | */ | |
4233 | if (send_mld) | |
4234 | ipv6_mc_dad_complete(ifp->idev); | |
4235 | ||
c76fe2d9 DA |
4236 | /* send unsolicited NA if enabled */ |
4237 | if (send_na && | |
4238 | (ifp->idev->cnf.ndisc_notify || | |
4239 | dev_net(dev)->ipv6.devconf_all->ndisc_notify)) { | |
4240 | ndisc_send_na(dev, &in6addr_linklocal_allnodes, &ifp->addr, | |
4241 | /*router=*/ !!ifp->idev->cnf.forwarding, | |
4242 | /*solicited=*/ false, /*override=*/ true, | |
4243 | /*inc_opt=*/ true); | |
4244 | } | |
4245 | ||
1ec047eb | 4246 | if (send_rs) { |
1da177e4 LT |
4247 | /* |
4248 | * If a host as already performed a random delay | |
4249 | * [...] as part of DAD [...] there is no need | |
4250 | * to delay again before sending the first RS | |
4251 | */ | |
1ec047eb | 4252 | if (ipv6_get_lladdr(dev, &lladdr, IFA_F_TENTATIVE)) |
b7b1bfce | 4253 | return; |
1ec047eb | 4254 | ndisc_send_rs(dev, &lladdr, &in6addr_linklocal_allrouters); |
1da177e4 | 4255 | |
b7b1bfce HFS |
4256 | write_lock_bh(&ifp->idev->lock); |
4257 | spin_lock(&ifp->lock); | |
bd11f074 MŻ |
4258 | ifp->idev->rs_interval = rfc3315_s14_backoff_init( |
4259 | ifp->idev->cnf.rtr_solicit_interval); | |
b7b1bfce | 4260 | ifp->idev->rs_probes = 1; |
1da177e4 | 4261 | ifp->idev->if_flags |= IF_RS_SENT; |
bd11f074 | 4262 | addrconf_mod_rs_timer(ifp->idev, ifp->idev->rs_interval); |
b7b1bfce HFS |
4263 | spin_unlock(&ifp->lock); |
4264 | write_unlock_bh(&ifp->idev->lock); | |
1da177e4 | 4265 | } |
764d3be6 PA |
4266 | |
4267 | if (bump_id) | |
4268 | rt_genid_bump_ipv6(dev_net(dev)); | |
a11a7f71 MH |
4269 | |
4270 | /* Make sure that a new temporary address will be created | |
4271 | * before this temporary address becomes deprecated. | |
4272 | */ | |
4273 | if (ifp->flags & IFA_F_TEMPORARY) | |
8805d13f | 4274 | addrconf_verify_rtnl(dev_net(dev)); |
1da177e4 LT |
4275 | } |
4276 | ||
896585d4 | 4277 | static void addrconf_dad_run(struct inet6_dev *idev, bool restart) |
e21e8467 | 4278 | { |
c5e33bdd YH |
4279 | struct inet6_ifaddr *ifp; |
4280 | ||
4281 | read_lock_bh(&idev->lock); | |
502a2ffd | 4282 | list_for_each_entry(ifp, &idev->addr_list, if_list) { |
21809faf | 4283 | spin_lock(&ifp->lock); |
896585d4 HL |
4284 | if ((ifp->flags & IFA_F_TENTATIVE && |
4285 | ifp->state == INET6_IFADDR_STATE_DAD) || restart) { | |
4286 | if (restart) | |
4287 | ifp->state = INET6_IFADDR_STATE_PREDAD; | |
f2344a13 | 4288 | addrconf_dad_kick(ifp); |
896585d4 | 4289 | } |
21809faf | 4290 | spin_unlock(&ifp->lock); |
c5e33bdd YH |
4291 | } |
4292 | read_unlock_bh(&idev->lock); | |
4293 | } | |
4294 | ||
1da177e4 LT |
4295 | #ifdef CONFIG_PROC_FS |
4296 | struct if6_iter_state { | |
3c40090a | 4297 | struct seq_net_private p; |
1da177e4 | 4298 | int bucket; |
1d578303 | 4299 | int offset; |
1da177e4 LT |
4300 | }; |
4301 | ||
1d578303 | 4302 | static struct inet6_ifaddr *if6_get_first(struct seq_file *seq, loff_t pos) |
1da177e4 | 4303 | { |
1da177e4 | 4304 | struct if6_iter_state *state = seq->private; |
1218854a | 4305 | struct net *net = seq_file_net(seq); |
a5c1d98f | 4306 | struct inet6_ifaddr *ifa = NULL; |
1d578303 | 4307 | int p = 0; |
1da177e4 | 4308 | |
1d578303 MM |
4309 | /* initial bucket if pos is 0 */ |
4310 | if (pos == 0) { | |
4311 | state->bucket = 0; | |
4312 | state->offset = 0; | |
4313 | } | |
4314 | ||
4315 | for (; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) { | |
e66d1172 | 4316 | hlist_for_each_entry_rcu(ifa, &net->ipv6.inet6_addr_lst[state->bucket], |
1d578303 MM |
4317 | addr_lst) { |
4318 | /* sync with offset */ | |
4319 | if (p < state->offset) { | |
4320 | p++; | |
4321 | continue; | |
4322 | } | |
9f0d3c27 | 4323 | return ifa; |
1d578303 MM |
4324 | } |
4325 | ||
4326 | /* prepare for next bucket */ | |
4327 | state->offset = 0; | |
4328 | p = 0; | |
1da177e4 | 4329 | } |
c2e21293 | 4330 | return NULL; |
1da177e4 LT |
4331 | } |
4332 | ||
c2e21293 | 4333 | static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, |
4334 | struct inet6_ifaddr *ifa) | |
1da177e4 LT |
4335 | { |
4336 | struct if6_iter_state *state = seq->private; | |
1218854a | 4337 | struct net *net = seq_file_net(seq); |
1da177e4 | 4338 | |
a5c1d98f | 4339 | hlist_for_each_entry_continue_rcu(ifa, addr_lst) { |
1d578303 | 4340 | state->offset++; |
9f0d3c27 | 4341 | return ifa; |
1d578303 | 4342 | } |
3c40090a | 4343 | |
86f9bd1f | 4344 | state->offset = 0; |
c2e21293 | 4345 | while (++state->bucket < IN6_ADDR_HSIZE) { |
a5c1d98f | 4346 | hlist_for_each_entry_rcu(ifa, |
e66d1172 | 4347 | &net->ipv6.inet6_addr_lst[state->bucket], addr_lst) { |
9f0d3c27 | 4348 | return ifa; |
c2e21293 | 4349 | } |
1da177e4 | 4350 | } |
3c40090a | 4351 | |
c2e21293 | 4352 | return NULL; |
1da177e4 LT |
4353 | } |
4354 | ||
1da177e4 | 4355 | static void *if6_seq_start(struct seq_file *seq, loff_t *pos) |
a5c1d98f | 4356 | __acquires(rcu) |
1da177e4 | 4357 | { |
a5c1d98f | 4358 | rcu_read_lock(); |
1d578303 | 4359 | return if6_get_first(seq, *pos); |
1da177e4 LT |
4360 | } |
4361 | ||
4362 | static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
4363 | { | |
4364 | struct inet6_ifaddr *ifa; | |
4365 | ||
4366 | ifa = if6_get_next(seq, v); | |
4367 | ++*pos; | |
4368 | return ifa; | |
4369 | } | |
4370 | ||
4371 | static void if6_seq_stop(struct seq_file *seq, void *v) | |
a5c1d98f | 4372 | __releases(rcu) |
1da177e4 | 4373 | { |
a5c1d98f | 4374 | rcu_read_unlock(); |
1da177e4 LT |
4375 | } |
4376 | ||
4377 | static int if6_seq_show(struct seq_file *seq, void *v) | |
4378 | { | |
4379 | struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; | |
971a351c | 4380 | seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n", |
b071195d | 4381 | &ifp->addr, |
1da177e4 LT |
4382 | ifp->idev->dev->ifindex, |
4383 | ifp->prefix_len, | |
4384 | ifp->scope, | |
971a351c | 4385 | (u8) ifp->flags, |
1da177e4 LT |
4386 | ifp->idev->dev->name); |
4387 | return 0; | |
4388 | } | |
4389 | ||
56b3d975 | 4390 | static const struct seq_operations if6_seq_ops = { |
1da177e4 LT |
4391 | .start = if6_seq_start, |
4392 | .next = if6_seq_next, | |
4393 | .show = if6_seq_show, | |
4394 | .stop = if6_seq_stop, | |
4395 | }; | |
4396 | ||
2c8c1e72 | 4397 | static int __net_init if6_proc_net_init(struct net *net) |
1da177e4 | 4398 | { |
c3506372 CH |
4399 | if (!proc_create_net("if_inet6", 0444, net->proc_net, &if6_seq_ops, |
4400 | sizeof(struct if6_iter_state))) | |
1da177e4 LT |
4401 | return -ENOMEM; |
4402 | return 0; | |
4403 | } | |
4404 | ||
2c8c1e72 | 4405 | static void __net_exit if6_proc_net_exit(struct net *net) |
3c40090a | 4406 | { |
ece31ffd | 4407 | remove_proc_entry("if_inet6", net->proc_net); |
3c40090a DL |
4408 | } |
4409 | ||
4410 | static struct pernet_operations if6_proc_net_ops = { | |
67ba4152 IM |
4411 | .init = if6_proc_net_init, |
4412 | .exit = if6_proc_net_exit, | |
3c40090a DL |
4413 | }; |
4414 | ||
4415 | int __init if6_proc_init(void) | |
4416 | { | |
4417 | return register_pernet_subsys(&if6_proc_net_ops); | |
4418 | } | |
4419 | ||
1da177e4 LT |
4420 | void if6_proc_exit(void) |
4421 | { | |
3c40090a | 4422 | unregister_pernet_subsys(&if6_proc_net_ops); |
1da177e4 LT |
4423 | } |
4424 | #endif /* CONFIG_PROC_FS */ | |
4425 | ||
07a93626 | 4426 | #if IS_ENABLED(CONFIG_IPV6_MIP6) |
3b9f9a1c | 4427 | /* Check if address is a home address configured on any interface. */ |
b71d1d42 | 4428 | int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr) |
3b9f9a1c | 4429 | { |
3f27fb23 | 4430 | unsigned int hash = inet6_addr_hash(net, addr); |
c2e21293 | 4431 | struct inet6_ifaddr *ifp = NULL; |
3f27fb23 | 4432 | int ret = 0; |
c2e21293 | 4433 | |
4e5f47ab | 4434 | rcu_read_lock(); |
e66d1172 | 4435 | hlist_for_each_entry_rcu(ifp, &net->ipv6.inet6_addr_lst[hash], addr_lst) { |
caad295f | 4436 | if (ipv6_addr_equal(&ifp->addr, addr) && |
3b9f9a1c NT |
4437 | (ifp->flags & IFA_F_HOMEADDRESS)) { |
4438 | ret = 1; | |
4439 | break; | |
4440 | } | |
4441 | } | |
4e5f47ab | 4442 | rcu_read_unlock(); |
3b9f9a1c NT |
4443 | return ret; |
4444 | } | |
4445 | #endif | |
4446 | ||
f37c6059 AA |
4447 | /* RFC6554 has some algorithm to avoid loops in segment routing by |
4448 | * checking if the segments contains any of a local interface address. | |
4449 | * | |
4450 | * Quote: | |
4451 | * | |
4452 | * To detect loops in the SRH, a router MUST determine if the SRH | |
4453 | * includes multiple addresses assigned to any interface on that router. | |
4454 | * If such addresses appear more than once and are separated by at least | |
4455 | * one address not assigned to that router. | |
4456 | */ | |
4457 | int ipv6_chk_rpl_srh_loop(struct net *net, const struct in6_addr *segs, | |
4458 | unsigned char nsegs) | |
4459 | { | |
4460 | const struct in6_addr *addr; | |
4461 | int i, ret = 0, found = 0; | |
4462 | struct inet6_ifaddr *ifp; | |
4463 | bool separated = false; | |
4464 | unsigned int hash; | |
4465 | bool hash_found; | |
4466 | ||
4467 | rcu_read_lock(); | |
4468 | for (i = 0; i < nsegs; i++) { | |
4469 | addr = &segs[i]; | |
4470 | hash = inet6_addr_hash(net, addr); | |
4471 | ||
4472 | hash_found = false; | |
e66d1172 | 4473 | hlist_for_each_entry_rcu(ifp, &net->ipv6.inet6_addr_lst[hash], addr_lst) { |
f37c6059 AA |
4474 | |
4475 | if (ipv6_addr_equal(&ifp->addr, addr)) { | |
4476 | hash_found = true; | |
4477 | break; | |
4478 | } | |
4479 | } | |
4480 | ||
4481 | if (hash_found) { | |
4482 | if (found > 1 && separated) { | |
4483 | ret = 1; | |
4484 | break; | |
4485 | } | |
4486 | ||
4487 | separated = false; | |
4488 | found++; | |
4489 | } else { | |
4490 | separated = true; | |
4491 | } | |
4492 | } | |
4493 | rcu_read_unlock(); | |
4494 | ||
4495 | return ret; | |
4496 | } | |
4497 | ||
1da177e4 LT |
4498 | /* |
4499 | * Periodic address status verification | |
4500 | */ | |
4501 | ||
8805d13f | 4502 | static void addrconf_verify_rtnl(struct net *net) |
1da177e4 | 4503 | { |
b2db7564 | 4504 | unsigned long now, next, next_sec, next_sched; |
1da177e4 | 4505 | struct inet6_ifaddr *ifp; |
1da177e4 LT |
4506 | int i; |
4507 | ||
c15b1cca HFS |
4508 | ASSERT_RTNL(); |
4509 | ||
5c578aed | 4510 | rcu_read_lock_bh(); |
1da177e4 | 4511 | now = jiffies; |
b2db7564 | 4512 | next = round_jiffies_up(now + ADDR_CHECK_FREQUENCY); |
1da177e4 | 4513 | |
8805d13f | 4514 | cancel_delayed_work(&net->ipv6.addr_chk_work); |
1da177e4 | 4515 | |
bcdd553f | 4516 | for (i = 0; i < IN6_ADDR_HSIZE; i++) { |
1da177e4 | 4517 | restart: |
e66d1172 | 4518 | hlist_for_each_entry_rcu_bh(ifp, &net->ipv6.inet6_addr_lst[i], addr_lst) { |
1da177e4 | 4519 | unsigned long age; |
1da177e4 | 4520 | |
fad8da3e YA |
4521 | /* When setting preferred_lft to a value not zero or |
4522 | * infinity, while valid_lft is infinity | |
4523 | * IFA_F_PERMANENT has a non-infinity life time. | |
4524 | */ | |
4525 | if ((ifp->flags & IFA_F_PERMANENT) && | |
4526 | (ifp->prefered_lft == INFINITY_LIFE_TIME)) | |
1da177e4 LT |
4527 | continue; |
4528 | ||
4529 | spin_lock(&ifp->lock); | |
b2db7564 YH |
4530 | /* We try to batch several events at once. */ |
4531 | age = (now - ifp->tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ; | |
1da177e4 | 4532 | |
778964f2 SE |
4533 | if ((ifp->flags&IFA_F_TEMPORARY) && |
4534 | !(ifp->flags&IFA_F_TENTATIVE) && | |
4535 | ifp->prefered_lft != INFINITY_LIFE_TIME && | |
4536 | !ifp->regen_count && ifp->ifpub) { | |
4537 | /* This is a non-regenerated temporary addr. */ | |
4538 | ||
4539 | unsigned long regen_advance = ifp->idev->cnf.regen_max_retry * | |
4540 | ifp->idev->cnf.dad_transmits * | |
4541 | max(NEIGH_VAR(ifp->idev->nd_parms, RETRANS_TIME), HZ/100) / HZ; | |
4542 | ||
4543 | if (age + regen_advance >= ifp->prefered_lft) { | |
4544 | struct inet6_ifaddr *ifpub = ifp->ifpub; | |
4545 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
4546 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
4547 | ||
4548 | ifp->regen_count++; | |
4549 | in6_ifa_hold(ifp); | |
4550 | in6_ifa_hold(ifpub); | |
4551 | spin_unlock(&ifp->lock); | |
4552 | ||
4553 | spin_lock(&ifpub->lock); | |
4554 | ifpub->regen_count = 0; | |
4555 | spin_unlock(&ifpub->lock); | |
4556 | rcu_read_unlock_bh(); | |
4557 | ipv6_create_tempaddr(ifpub, true); | |
4558 | in6_ifa_put(ifpub); | |
4559 | in6_ifa_put(ifp); | |
4560 | rcu_read_lock_bh(); | |
4561 | goto restart; | |
4562 | } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next)) | |
4563 | next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ; | |
4564 | } | |
4565 | ||
8f27ebb9 YH |
4566 | if (ifp->valid_lft != INFINITY_LIFE_TIME && |
4567 | age >= ifp->valid_lft) { | |
1da177e4 LT |
4568 | spin_unlock(&ifp->lock); |
4569 | in6_ifa_hold(ifp); | |
aa8caa76 | 4570 | rcu_read_unlock_bh(); |
1da177e4 | 4571 | ipv6_del_addr(ifp); |
aa8caa76 | 4572 | rcu_read_lock_bh(); |
1da177e4 | 4573 | goto restart; |
8f27ebb9 YH |
4574 | } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) { |
4575 | spin_unlock(&ifp->lock); | |
4576 | continue; | |
1da177e4 | 4577 | } else if (age >= ifp->prefered_lft) { |
a1ed0526 | 4578 | /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */ |
1da177e4 LT |
4579 | int deprecate = 0; |
4580 | ||
4581 | if (!(ifp->flags&IFA_F_DEPRECATED)) { | |
4582 | deprecate = 1; | |
4583 | ifp->flags |= IFA_F_DEPRECATED; | |
4584 | } | |
4585 | ||
fad8da3e YA |
4586 | if ((ifp->valid_lft != INFINITY_LIFE_TIME) && |
4587 | (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))) | |
1da177e4 LT |
4588 | next = ifp->tstamp + ifp->valid_lft * HZ; |
4589 | ||
4590 | spin_unlock(&ifp->lock); | |
4591 | ||
4592 | if (deprecate) { | |
4593 | in6_ifa_hold(ifp); | |
1da177e4 LT |
4594 | |
4595 | ipv6_ifa_notify(0, ifp); | |
4596 | in6_ifa_put(ifp); | |
4597 | goto restart; | |
4598 | } | |
1da177e4 LT |
4599 | } else { |
4600 | /* ifp->prefered_lft <= ifp->valid_lft */ | |
4601 | if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next)) | |
4602 | next = ifp->tstamp + ifp->prefered_lft * HZ; | |
4603 | spin_unlock(&ifp->lock); | |
4604 | } | |
4605 | } | |
1da177e4 LT |
4606 | } |
4607 | ||
b2db7564 YH |
4608 | next_sec = round_jiffies_up(next); |
4609 | next_sched = next; | |
4610 | ||
4611 | /* If rounded timeout is accurate enough, accept it. */ | |
4612 | if (time_before(next_sec, next + ADDRCONF_TIMER_FUZZ)) | |
4613 | next_sched = next_sec; | |
4614 | ||
4615 | /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */ | |
4616 | if (time_before(next_sched, jiffies + ADDRCONF_TIMER_FUZZ_MAX)) | |
4617 | next_sched = jiffies + ADDRCONF_TIMER_FUZZ_MAX; | |
4618 | ||
e32ac250 JP |
4619 | pr_debug("now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n", |
4620 | now, next, next_sec, next_sched); | |
8805d13f | 4621 | mod_delayed_work(addrconf_wq, &net->ipv6.addr_chk_work, next_sched - now); |
5c578aed | 4622 | rcu_read_unlock_bh(); |
1da177e4 LT |
4623 | } |
4624 | ||
c15b1cca HFS |
4625 | static void addrconf_verify_work(struct work_struct *w) |
4626 | { | |
8805d13f ED |
4627 | struct net *net = container_of(to_delayed_work(w), struct net, |
4628 | ipv6.addr_chk_work); | |
4629 | ||
c15b1cca | 4630 | rtnl_lock(); |
8805d13f | 4631 | addrconf_verify_rtnl(net); |
c15b1cca HFS |
4632 | rtnl_unlock(); |
4633 | } | |
4634 | ||
8805d13f | 4635 | static void addrconf_verify(struct net *net) |
c15b1cca | 4636 | { |
8805d13f | 4637 | mod_delayed_work(addrconf_wq, &net->ipv6.addr_chk_work, 0); |
c15b1cca HFS |
4638 | } |
4639 | ||
caeaba79 ND |
4640 | static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local, |
4641 | struct in6_addr **peer_pfx) | |
461d8837 TG |
4642 | { |
4643 | struct in6_addr *pfx = NULL; | |
4644 | ||
caeaba79 ND |
4645 | *peer_pfx = NULL; |
4646 | ||
461d8837 TG |
4647 | if (addr) |
4648 | pfx = nla_data(addr); | |
4649 | ||
4650 | if (local) { | |
4651 | if (pfx && nla_memcmp(local, pfx, sizeof(*pfx))) | |
caeaba79 ND |
4652 | *peer_pfx = pfx; |
4653 | pfx = nla_data(local); | |
461d8837 TG |
4654 | } |
4655 | ||
4656 | return pfx; | |
4657 | } | |
4658 | ||
ef7c79ed | 4659 | static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = { |
461d8837 TG |
4660 | [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, |
4661 | [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, | |
4662 | [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, | |
479840ff | 4663 | [IFA_FLAGS] = { .len = sizeof(u32) }, |
8308f3ff | 4664 | [IFA_RT_PRIORITY] = { .len = sizeof(u32) }, |
6ecf4c37 | 4665 | [IFA_TARGET_NETNSID] = { .type = NLA_S32 }, |
47f0bd50 | 4666 | [IFA_PROTO] = { .type = NLA_U8 }, |
461d8837 TG |
4667 | }; |
4668 | ||
1da177e4 | 4669 | static int |
c21ef3e3 DA |
4670 | inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, |
4671 | struct netlink_ext_ack *extack) | |
1da177e4 | 4672 | { |
3b1e0a65 | 4673 | struct net *net = sock_net(skb->sk); |
b933f716 TG |
4674 | struct ifaddrmsg *ifm; |
4675 | struct nlattr *tb[IFA_MAX+1]; | |
caeaba79 | 4676 | struct in6_addr *pfx, *peer_pfx; |
6046d5b4 | 4677 | u32 ifa_flags; |
b933f716 | 4678 | int err; |
1da177e4 | 4679 | |
8cb08174 JB |
4680 | err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFA_MAX, |
4681 | ifa_ipv6_policy, extack); | |
b933f716 TG |
4682 | if (err < 0) |
4683 | return err; | |
4684 | ||
4685 | ifm = nlmsg_data(nlh); | |
caeaba79 | 4686 | pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer_pfx); |
63159f29 | 4687 | if (!pfx) |
1da177e4 LT |
4688 | return -EINVAL; |
4689 | ||
6046d5b4 HK |
4690 | ifa_flags = tb[IFA_FLAGS] ? nla_get_u32(tb[IFA_FLAGS]) : ifm->ifa_flags; |
4691 | ||
4692 | /* We ignore other flags so far. */ | |
4693 | ifa_flags &= IFA_F_MANAGETEMPADDR; | |
4694 | ||
4695 | return inet6_addr_del(net, ifm->ifa_index, ifa_flags, pfx, | |
4696 | ifm->ifa_prefixlen); | |
1da177e4 LT |
4697 | } |
4698 | ||
8308f3ff | 4699 | static int modify_prefix_route(struct inet6_ifaddr *ifp, |
61794012 HL |
4700 | unsigned long expires, u32 flags, |
4701 | bool modify_peer) | |
8308f3ff DA |
4702 | { |
4703 | struct fib6_info *f6i; | |
e7c7faa9 | 4704 | u32 prio; |
8308f3ff | 4705 | |
61794012 HL |
4706 | f6i = addrconf_get_prefix_route(modify_peer ? &ifp->peer_addr : &ifp->addr, |
4707 | ifp->prefix_len, | |
2b2450ca | 4708 | ifp->idev->dev, 0, RTF_DEFAULT, true); |
8308f3ff DA |
4709 | if (!f6i) |
4710 | return -ENOENT; | |
4711 | ||
e7c7faa9 DA |
4712 | prio = ifp->rt_priority ? : IP6_RT_PRIO_ADDRCONF; |
4713 | if (f6i->fib6_metric != prio) { | |
4714 | /* delete old one */ | |
11dd74b3 | 4715 | ip6_del_rt(dev_net(ifp->idev->dev), f6i, false); |
e7c7faa9 | 4716 | |
8308f3ff | 4717 | /* add new one */ |
61794012 HL |
4718 | addrconf_prefix_route(modify_peer ? &ifp->peer_addr : &ifp->addr, |
4719 | ifp->prefix_len, | |
8308f3ff DA |
4720 | ifp->rt_priority, ifp->idev->dev, |
4721 | expires, flags, GFP_KERNEL); | |
8308f3ff DA |
4722 | } else { |
4723 | if (!expires) | |
4724 | fib6_clean_expires(f6i); | |
4725 | else | |
4726 | fib6_set_expires(f6i, expires); | |
4727 | ||
4728 | fib6_info_release(f6i); | |
4729 | } | |
4730 | ||
4731 | return 0; | |
4732 | } | |
4733 | ||
8805d13f ED |
4734 | static int inet6_addr_modify(struct net *net, struct inet6_ifaddr *ifp, |
4735 | struct ifa6_config *cfg) | |
081bba5b | 4736 | { |
6f704992 YH |
4737 | u32 flags; |
4738 | clock_t expires; | |
4bed72e4 | 4739 | unsigned long timeout; |
53bd6749 | 4740 | bool was_managetempaddr; |
5b84efec | 4741 | bool had_prefixroute; |
d0098e4c | 4742 | bool new_peer = false; |
46d48046 | 4743 | |
c15b1cca HFS |
4744 | ASSERT_RTNL(); |
4745 | ||
d169a1f8 | 4746 | if (!cfg->valid_lft || cfg->preferred_lft > cfg->valid_lft) |
081bba5b NT |
4747 | return -EINVAL; |
4748 | ||
d169a1f8 | 4749 | if (cfg->ifa_flags & IFA_F_MANAGETEMPADDR && |
53bd6749 JP |
4750 | (ifp->flags & IFA_F_TEMPORARY || ifp->prefix_len != 64)) |
4751 | return -EINVAL; | |
4752 | ||
f1c02cfb | 4753 | if (!(ifp->flags & IFA_F_TENTATIVE) || ifp->flags & IFA_F_DADFAILED) |
d169a1f8 | 4754 | cfg->ifa_flags &= ~IFA_F_OPTIMISTIC; |
f1c02cfb | 4755 | |
d169a1f8 | 4756 | timeout = addrconf_timeout_fixup(cfg->valid_lft, HZ); |
4bed72e4 YH |
4757 | if (addrconf_finite_timeout(timeout)) { |
4758 | expires = jiffies_to_clock_t(timeout * HZ); | |
d169a1f8 | 4759 | cfg->valid_lft = timeout; |
6f704992 | 4760 | flags = RTF_EXPIRES; |
4bed72e4 YH |
4761 | } else { |
4762 | expires = 0; | |
4763 | flags = 0; | |
d169a1f8 | 4764 | cfg->ifa_flags |= IFA_F_PERMANENT; |
6f704992 | 4765 | } |
081bba5b | 4766 | |
d169a1f8 | 4767 | timeout = addrconf_timeout_fixup(cfg->preferred_lft, HZ); |
4bed72e4 YH |
4768 | if (addrconf_finite_timeout(timeout)) { |
4769 | if (timeout == 0) | |
d169a1f8 DA |
4770 | cfg->ifa_flags |= IFA_F_DEPRECATED; |
4771 | cfg->preferred_lft = timeout; | |
4bed72e4 | 4772 | } |
081bba5b | 4773 | |
d0098e4c HL |
4774 | if (cfg->peer_pfx && |
4775 | memcmp(&ifp->peer_addr, cfg->peer_pfx, sizeof(struct in6_addr))) { | |
4776 | if (!ipv6_addr_any(&ifp->peer_addr)) | |
4777 | cleanup_prefix_route(ifp, expires, true, true); | |
4778 | new_peer = true; | |
4779 | } | |
4780 | ||
081bba5b | 4781 | spin_lock_bh(&ifp->lock); |
53bd6749 | 4782 | was_managetempaddr = ifp->flags & IFA_F_MANAGETEMPADDR; |
5b84efec TH |
4783 | had_prefixroute = ifp->flags & IFA_F_PERMANENT && |
4784 | !(ifp->flags & IFA_F_NOPREFIXROUTE); | |
53bd6749 | 4785 | ifp->flags &= ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | |
761aac73 TH |
4786 | IFA_F_HOMEADDRESS | IFA_F_MANAGETEMPADDR | |
4787 | IFA_F_NOPREFIXROUTE); | |
d169a1f8 | 4788 | ifp->flags |= cfg->ifa_flags; |
081bba5b | 4789 | ifp->tstamp = jiffies; |
d169a1f8 DA |
4790 | ifp->valid_lft = cfg->valid_lft; |
4791 | ifp->prefered_lft = cfg->preferred_lft; | |
47f0bd50 | 4792 | ifp->ifa_proto = cfg->ifa_proto; |
081bba5b | 4793 | |
8308f3ff DA |
4794 | if (cfg->rt_priority && cfg->rt_priority != ifp->rt_priority) |
4795 | ifp->rt_priority = cfg->rt_priority; | |
081bba5b | 4796 | |
d0098e4c HL |
4797 | if (new_peer) |
4798 | ifp->peer_addr = *cfg->peer_pfx; | |
4799 | ||
081bba5b NT |
4800 | spin_unlock_bh(&ifp->lock); |
4801 | if (!(ifp->flags&IFA_F_TENTATIVE)) | |
4802 | ipv6_ifa_notify(0, ifp); | |
081bba5b | 4803 | |
d169a1f8 | 4804 | if (!(cfg->ifa_flags & IFA_F_NOPREFIXROUTE)) { |
8308f3ff DA |
4805 | int rc = -ENOENT; |
4806 | ||
4807 | if (had_prefixroute) | |
61794012 | 4808 | rc = modify_prefix_route(ifp, expires, flags, false); |
8308f3ff DA |
4809 | |
4810 | /* prefix route could have been deleted; if so restore it */ | |
4811 | if (rc == -ENOENT) { | |
4812 | addrconf_prefix_route(&ifp->addr, ifp->prefix_len, | |
4813 | ifp->rt_priority, ifp->idev->dev, | |
4814 | expires, flags, GFP_KERNEL); | |
4815 | } | |
61794012 HL |
4816 | |
4817 | if (had_prefixroute && !ipv6_addr_any(&ifp->peer_addr)) | |
4818 | rc = modify_prefix_route(ifp, expires, flags, true); | |
4819 | ||
4820 | if (rc == -ENOENT && !ipv6_addr_any(&ifp->peer_addr)) { | |
4821 | addrconf_prefix_route(&ifp->peer_addr, ifp->prefix_len, | |
4822 | ifp->rt_priority, ifp->idev->dev, | |
4823 | expires, flags, GFP_KERNEL); | |
4824 | } | |
5b84efec TH |
4825 | } else if (had_prefixroute) { |
4826 | enum cleanup_prefix_rt_t action; | |
4827 | unsigned long rt_expires; | |
4828 | ||
4829 | write_lock_bh(&ifp->idev->lock); | |
4830 | action = check_cleanup_prefix_route(ifp, &rt_expires); | |
4831 | write_unlock_bh(&ifp->idev->lock); | |
4832 | ||
4833 | if (action != CLEANUP_PREFIX_RT_NOP) { | |
4834 | cleanup_prefix_route(ifp, rt_expires, | |
d0098e4c | 4835 | action == CLEANUP_PREFIX_RT_DEL, false); |
5b84efec | 4836 | } |
761aac73 | 4837 | } |
53bd6749 JP |
4838 | |
4839 | if (was_managetempaddr || ifp->flags & IFA_F_MANAGETEMPADDR) { | |
d169a1f8 DA |
4840 | if (was_managetempaddr && |
4841 | !(ifp->flags & IFA_F_MANAGETEMPADDR)) { | |
4842 | cfg->valid_lft = 0; | |
4843 | cfg->preferred_lft = 0; | |
4844 | } | |
4845 | manage_tempaddrs(ifp->idev, ifp, cfg->valid_lft, | |
4846 | cfg->preferred_lft, !was_managetempaddr, | |
4847 | jiffies); | |
53bd6749 JP |
4848 | } |
4849 | ||
8805d13f | 4850 | addrconf_verify_rtnl(net); |
081bba5b NT |
4851 | |
4852 | return 0; | |
4853 | } | |
4854 | ||
1da177e4 | 4855 | static int |
c21ef3e3 DA |
4856 | inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, |
4857 | struct netlink_ext_ack *extack) | |
1da177e4 | 4858 | { |
3b1e0a65 | 4859 | struct net *net = sock_net(skb->sk); |
461d8837 TG |
4860 | struct ifaddrmsg *ifm; |
4861 | struct nlattr *tb[IFA_MAX+1]; | |
19b1518c | 4862 | struct in6_addr *peer_pfx; |
7198f8ce TG |
4863 | struct inet6_ifaddr *ifa; |
4864 | struct net_device *dev; | |
f1c02cfb | 4865 | struct inet6_dev *idev; |
19b1518c | 4866 | struct ifa6_config cfg; |
461d8837 | 4867 | int err; |
1da177e4 | 4868 | |
8cb08174 JB |
4869 | err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFA_MAX, |
4870 | ifa_ipv6_policy, extack); | |
461d8837 TG |
4871 | if (err < 0) |
4872 | return err; | |
4873 | ||
19b1518c DA |
4874 | memset(&cfg, 0, sizeof(cfg)); |
4875 | ||
461d8837 | 4876 | ifm = nlmsg_data(nlh); |
19b1518c DA |
4877 | cfg.pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer_pfx); |
4878 | if (!cfg.pfx) | |
1da177e4 LT |
4879 | return -EINVAL; |
4880 | ||
19b1518c DA |
4881 | cfg.peer_pfx = peer_pfx; |
4882 | cfg.plen = ifm->ifa_prefixlen; | |
8308f3ff DA |
4883 | if (tb[IFA_RT_PRIORITY]) |
4884 | cfg.rt_priority = nla_get_u32(tb[IFA_RT_PRIORITY]); | |
4885 | ||
47f0bd50 JL |
4886 | if (tb[IFA_PROTO]) |
4887 | cfg.ifa_proto = nla_get_u8(tb[IFA_PROTO]); | |
4888 | ||
19b1518c DA |
4889 | cfg.valid_lft = INFINITY_LIFE_TIME; |
4890 | cfg.preferred_lft = INFINITY_LIFE_TIME; | |
4891 | ||
461d8837 | 4892 | if (tb[IFA_CACHEINFO]) { |
0778769d | 4893 | struct ifa_cacheinfo *ci; |
461d8837 TG |
4894 | |
4895 | ci = nla_data(tb[IFA_CACHEINFO]); | |
19b1518c DA |
4896 | cfg.valid_lft = ci->ifa_valid; |
4897 | cfg.preferred_lft = ci->ifa_prefered; | |
0778769d NT |
4898 | } |
4899 | ||
af284937 | 4900 | dev = __dev_get_by_index(net, ifm->ifa_index); |
63159f29 | 4901 | if (!dev) |
7198f8ce TG |
4902 | return -ENODEV; |
4903 | ||
19b1518c DA |
4904 | if (tb[IFA_FLAGS]) |
4905 | cfg.ifa_flags = nla_get_u32(tb[IFA_FLAGS]); | |
4906 | else | |
4907 | cfg.ifa_flags = ifm->ifa_flags; | |
479840ff | 4908 | |
55ebaef1 | 4909 | /* We ignore other flags so far. */ |
19b1518c DA |
4910 | cfg.ifa_flags &= IFA_F_NODAD | IFA_F_HOMEADDRESS | |
4911 | IFA_F_MANAGETEMPADDR | IFA_F_NOPREFIXROUTE | | |
4912 | IFA_F_MCAUTOJOIN | IFA_F_OPTIMISTIC; | |
f1c02cfb SD |
4913 | |
4914 | idev = ipv6_find_idev(dev); | |
db0b99f5 SD |
4915 | if (IS_ERR(idev)) |
4916 | return PTR_ERR(idev); | |
f1c02cfb SD |
4917 | |
4918 | if (!ipv6_allow_optimistic_dad(net, idev)) | |
19b1518c | 4919 | cfg.ifa_flags &= ~IFA_F_OPTIMISTIC; |
f1c02cfb | 4920 | |
19b1518c DA |
4921 | if (cfg.ifa_flags & IFA_F_NODAD && |
4922 | cfg.ifa_flags & IFA_F_OPTIMISTIC) { | |
f1c02cfb SD |
4923 | NL_SET_ERR_MSG(extack, "IFA_F_NODAD and IFA_F_OPTIMISTIC are mutually exclusive"); |
4924 | return -EINVAL; | |
4925 | } | |
55ebaef1 | 4926 | |
19b1518c | 4927 | ifa = ipv6_get_ifaddr(net, cfg.pfx, dev, 1); |
63159f29 | 4928 | if (!ifa) { |
7198f8ce TG |
4929 | /* |
4930 | * It would be best to check for !NLM_F_CREATE here but | |
db9c7c39 | 4931 | * userspace already relies on not having to provide this. |
7198f8ce | 4932 | */ |
19b1518c | 4933 | return inet6_addr_add(net, ifm->ifa_index, &cfg, extack); |
081bba5b NT |
4934 | } |
4935 | ||
7198f8ce TG |
4936 | if (nlh->nlmsg_flags & NLM_F_EXCL || |
4937 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) | |
4938 | err = -EEXIST; | |
4939 | else | |
8805d13f | 4940 | err = inet6_addr_modify(net, ifa, &cfg); |
7198f8ce TG |
4941 | |
4942 | in6_ifa_put(ifa); | |
4943 | ||
4944 | return err; | |
1da177e4 LT |
4945 | } |
4946 | ||
479840ff | 4947 | static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u32 flags, |
101bb229 TG |
4948 | u8 scope, int ifindex) |
4949 | { | |
4950 | struct ifaddrmsg *ifm; | |
4951 | ||
4952 | ifm = nlmsg_data(nlh); | |
4953 | ifm->ifa_family = AF_INET6; | |
4954 | ifm->ifa_prefixlen = prefixlen; | |
4955 | ifm->ifa_flags = flags; | |
4956 | ifm->ifa_scope = scope; | |
4957 | ifm->ifa_index = ifindex; | |
4958 | } | |
4959 | ||
85486af0 TG |
4960 | static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, |
4961 | unsigned long tstamp, u32 preferred, u32 valid) | |
4962 | { | |
4963 | struct ifa_cacheinfo ci; | |
4964 | ||
18a31e1e TG |
4965 | ci.cstamp = cstamp_delta(cstamp); |
4966 | ci.tstamp = cstamp_delta(tstamp); | |
85486af0 TG |
4967 | ci.ifa_prefered = preferred; |
4968 | ci.ifa_valid = valid; | |
4969 | ||
4970 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
4971 | } | |
4972 | ||
101bb229 TG |
4973 | static inline int rt_scope(int ifa_scope) |
4974 | { | |
4975 | if (ifa_scope & IFA_HOST) | |
4976 | return RT_SCOPE_HOST; | |
4977 | else if (ifa_scope & IFA_LINK) | |
4978 | return RT_SCOPE_LINK; | |
4979 | else if (ifa_scope & IFA_SITE) | |
4980 | return RT_SCOPE_SITE; | |
4981 | else | |
4982 | return RT_SCOPE_UNIVERSE; | |
4983 | } | |
4984 | ||
0ab6803b TG |
4985 | static inline int inet6_ifaddr_msgsize(void) |
4986 | { | |
339bf98f | 4987 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
caeaba79 | 4988 | + nla_total_size(16) /* IFA_LOCAL */ |
339bf98f | 4989 | + nla_total_size(16) /* IFA_ADDRESS */ |
479840ff | 4990 | + nla_total_size(sizeof(struct ifa_cacheinfo)) |
8308f3ff | 4991 | + nla_total_size(4) /* IFA_FLAGS */ |
47f0bd50 | 4992 | + nla_total_size(1) /* IFA_PROTO */ |
8308f3ff | 4993 | + nla_total_size(4) /* IFA_RT_PRIORITY */; |
0ab6803b | 4994 | } |
c5396a31 | 4995 | |
6ba1e6e8 DA |
4996 | enum addr_type_t { |
4997 | UNICAST_ADDR, | |
4998 | MULTICAST_ADDR, | |
4999 | ANYCAST_ADDR, | |
5000 | }; | |
5001 | ||
203651b6 CB |
5002 | struct inet6_fill_args { |
5003 | u32 portid; | |
5004 | u32 seq; | |
5005 | int event; | |
5006 | unsigned int flags; | |
5007 | int netnsid; | |
6371a71f | 5008 | int ifindex; |
6ba1e6e8 | 5009 | enum addr_type_t type; |
203651b6 CB |
5010 | }; |
5011 | ||
1da177e4 | 5012 | static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, |
203651b6 | 5013 | struct inet6_fill_args *args) |
1da177e4 | 5014 | { |
1da177e4 | 5015 | struct nlmsghdr *nlh; |
85486af0 | 5016 | u32 preferred, valid; |
1da177e4 | 5017 | |
203651b6 CB |
5018 | nlh = nlmsg_put(skb, args->portid, args->seq, args->event, |
5019 | sizeof(struct ifaddrmsg), args->flags); | |
63159f29 | 5020 | if (!nlh) |
26932566 | 5021 | return -EMSGSIZE; |
0ab6803b | 5022 | |
101bb229 TG |
5023 | put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), |
5024 | ifa->idev->dev->ifindex); | |
5025 | ||
203651b6 CB |
5026 | if (args->netnsid >= 0 && |
5027 | nla_put_s32(skb, IFA_TARGET_NETNSID, args->netnsid)) | |
6ecf4c37 CB |
5028 | goto error; |
5029 | ||
6c0d8833 | 5030 | spin_lock_bh(&ifa->lock); |
fad8da3e YA |
5031 | if (!((ifa->flags&IFA_F_PERMANENT) && |
5032 | (ifa->prefered_lft == INFINITY_LIFE_TIME))) { | |
85486af0 TG |
5033 | preferred = ifa->prefered_lft; |
5034 | valid = ifa->valid_lft; | |
5035 | if (preferred != INFINITY_LIFE_TIME) { | |
1da177e4 | 5036 | long tval = (jiffies - ifa->tstamp)/HZ; |
a1faa698 JR |
5037 | if (preferred > tval) |
5038 | preferred -= tval; | |
5039 | else | |
5040 | preferred = 0; | |
f56619fc BH |
5041 | if (valid != INFINITY_LIFE_TIME) { |
5042 | if (valid > tval) | |
5043 | valid -= tval; | |
5044 | else | |
5045 | valid = 0; | |
5046 | } | |
1da177e4 LT |
5047 | } |
5048 | } else { | |
85486af0 TG |
5049 | preferred = INFINITY_LIFE_TIME; |
5050 | valid = INFINITY_LIFE_TIME; | |
5051 | } | |
6c0d8833 | 5052 | spin_unlock_bh(&ifa->lock); |
85486af0 | 5053 | |
7996c799 | 5054 | if (!ipv6_addr_any(&ifa->peer_addr)) { |
930345ea JB |
5055 | if (nla_put_in6_addr(skb, IFA_LOCAL, &ifa->addr) < 0 || |
5056 | nla_put_in6_addr(skb, IFA_ADDRESS, &ifa->peer_addr) < 0) | |
caeaba79 ND |
5057 | goto error; |
5058 | } else | |
930345ea | 5059 | if (nla_put_in6_addr(skb, IFA_ADDRESS, &ifa->addr) < 0) |
caeaba79 ND |
5060 | goto error; |
5061 | ||
8308f3ff DA |
5062 | if (ifa->rt_priority && |
5063 | nla_put_u32(skb, IFA_RT_PRIORITY, ifa->rt_priority)) | |
5064 | goto error; | |
5065 | ||
caeaba79 ND |
5066 | if (put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) |
5067 | goto error; | |
1da177e4 | 5068 | |
479840ff JP |
5069 | if (nla_put_u32(skb, IFA_FLAGS, ifa->flags) < 0) |
5070 | goto error; | |
5071 | ||
47f0bd50 JL |
5072 | if (ifa->ifa_proto && |
5073 | nla_put_u8(skb, IFA_PROTO, ifa->ifa_proto)) | |
5074 | goto error; | |
5075 | ||
053c095a JB |
5076 | nlmsg_end(skb, nlh); |
5077 | return 0; | |
caeaba79 ND |
5078 | |
5079 | error: | |
5080 | nlmsg_cancel(skb, nlh); | |
5081 | return -EMSGSIZE; | |
1da177e4 LT |
5082 | } |
5083 | ||
5084 | static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, | |
203651b6 | 5085 | struct inet6_fill_args *args) |
1da177e4 | 5086 | { |
1da177e4 | 5087 | struct nlmsghdr *nlh; |
101bb229 TG |
5088 | u8 scope = RT_SCOPE_UNIVERSE; |
5089 | int ifindex = ifmca->idev->dev->ifindex; | |
5090 | ||
5091 | if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE) | |
5092 | scope = RT_SCOPE_SITE; | |
1da177e4 | 5093 | |
203651b6 CB |
5094 | nlh = nlmsg_put(skb, args->portid, args->seq, args->event, |
5095 | sizeof(struct ifaddrmsg), args->flags); | |
63159f29 | 5096 | if (!nlh) |
26932566 | 5097 | return -EMSGSIZE; |
85486af0 | 5098 | |
203651b6 | 5099 | if (args->netnsid >= 0 && |
ceb736e1 ZQ |
5100 | nla_put_s32(skb, IFA_TARGET_NETNSID, args->netnsid)) { |
5101 | nlmsg_cancel(skb, nlh); | |
6ecf4c37 | 5102 | return -EMSGSIZE; |
ceb736e1 | 5103 | } |
6ecf4c37 | 5104 | |
0ab6803b | 5105 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
930345ea | 5106 | if (nla_put_in6_addr(skb, IFA_MULTICAST, &ifmca->mca_addr) < 0 || |
0ab6803b | 5107 | put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp, |
26932566 PM |
5108 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
5109 | nlmsg_cancel(skb, nlh); | |
5110 | return -EMSGSIZE; | |
5111 | } | |
85486af0 | 5112 | |
053c095a JB |
5113 | nlmsg_end(skb, nlh); |
5114 | return 0; | |
1da177e4 LT |
5115 | } |
5116 | ||
5117 | static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, | |
203651b6 | 5118 | struct inet6_fill_args *args) |
1da177e4 | 5119 | { |
9ee8cbb2 DA |
5120 | struct net_device *dev = fib6_info_nh_dev(ifaca->aca_rt); |
5121 | int ifindex = dev ? dev->ifindex : 1; | |
1da177e4 | 5122 | struct nlmsghdr *nlh; |
101bb229 | 5123 | u8 scope = RT_SCOPE_UNIVERSE; |
101bb229 TG |
5124 | |
5125 | if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) | |
5126 | scope = RT_SCOPE_SITE; | |
1da177e4 | 5127 | |
203651b6 CB |
5128 | nlh = nlmsg_put(skb, args->portid, args->seq, args->event, |
5129 | sizeof(struct ifaddrmsg), args->flags); | |
63159f29 | 5130 | if (!nlh) |
26932566 | 5131 | return -EMSGSIZE; |
85486af0 | 5132 | |
203651b6 | 5133 | if (args->netnsid >= 0 && |
ceb736e1 ZQ |
5134 | nla_put_s32(skb, IFA_TARGET_NETNSID, args->netnsid)) { |
5135 | nlmsg_cancel(skb, nlh); | |
6ecf4c37 | 5136 | return -EMSGSIZE; |
ceb736e1 | 5137 | } |
6ecf4c37 | 5138 | |
0ab6803b | 5139 | put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex); |
930345ea | 5140 | if (nla_put_in6_addr(skb, IFA_ANYCAST, &ifaca->aca_addr) < 0 || |
0ab6803b | 5141 | put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp, |
26932566 PM |
5142 | INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) { |
5143 | nlmsg_cancel(skb, nlh); | |
5144 | return -EMSGSIZE; | |
5145 | } | |
1da177e4 | 5146 | |
053c095a JB |
5147 | nlmsg_end(skb, nlh); |
5148 | return 0; | |
1da177e4 LT |
5149 | } |
5150 | ||
234b27c3 ED |
5151 | /* called with rcu_read_lock() */ |
5152 | static int in6_dump_addrs(struct inet6_dev *idev, struct sk_buff *skb, | |
fe884c2b | 5153 | struct netlink_callback *cb, int s_ip_idx, |
6ba1e6e8 | 5154 | struct inet6_fill_args *fillargs) |
234b27c3 | 5155 | { |
234b27c3 ED |
5156 | struct ifmcaddr6 *ifmca; |
5157 | struct ifacaddr6 *ifaca; | |
fe884c2b | 5158 | int ip_idx = 0; |
234b27c3 | 5159 | int err = 1; |
234b27c3 ED |
5160 | |
5161 | read_lock_bh(&idev->lock); | |
6ba1e6e8 | 5162 | switch (fillargs->type) { |
502a2ffd | 5163 | case UNICAST_ADDR: { |
5164 | struct inet6_ifaddr *ifa; | |
6ba1e6e8 | 5165 | fillargs->event = RTM_NEWADDR; |
502a2ffd | 5166 | |
234b27c3 | 5167 | /* unicast address incl. temp addr */ |
502a2ffd | 5168 | list_for_each_entry(ifa, &idev->addr_list, if_list) { |
4ba4c566 DA |
5169 | if (ip_idx < s_ip_idx) |
5170 | goto next; | |
6ba1e6e8 | 5171 | err = inet6_fill_ifaddr(skb, ifa, fillargs); |
053c095a | 5172 | if (err < 0) |
234b27c3 | 5173 | break; |
63998ac2 | 5174 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
4ba4c566 DA |
5175 | next: |
5176 | ip_idx++; | |
234b27c3 ED |
5177 | } |
5178 | break; | |
502a2ffd | 5179 | } |
234b27c3 | 5180 | case MULTICAST_ADDR: |
88e2ca30 | 5181 | read_unlock_bh(&idev->lock); |
6ba1e6e8 | 5182 | fillargs->event = RTM_GETMULTICAST; |
203651b6 | 5183 | |
234b27c3 | 5184 | /* multicast address */ |
4e43e64d | 5185 | for (ifmca = rtnl_dereference(idev->mc_list); |
88e2ca30 | 5186 | ifmca; |
4e43e64d | 5187 | ifmca = rtnl_dereference(ifmca->next), ip_idx++) { |
234b27c3 ED |
5188 | if (ip_idx < s_ip_idx) |
5189 | continue; | |
6ba1e6e8 | 5190 | err = inet6_fill_ifmcaddr(skb, ifmca, fillargs); |
053c095a | 5191 | if (err < 0) |
234b27c3 ED |
5192 | break; |
5193 | } | |
88e2ca30 | 5194 | read_lock_bh(&idev->lock); |
234b27c3 ED |
5195 | break; |
5196 | case ANYCAST_ADDR: | |
6ba1e6e8 | 5197 | fillargs->event = RTM_GETANYCAST; |
234b27c3 ED |
5198 | /* anycast address */ |
5199 | for (ifaca = idev->ac_list; ifaca; | |
5200 | ifaca = ifaca->aca_next, ip_idx++) { | |
5201 | if (ip_idx < s_ip_idx) | |
5202 | continue; | |
6ba1e6e8 | 5203 | err = inet6_fill_ifacaddr(skb, ifaca, fillargs); |
053c095a | 5204 | if (err < 0) |
234b27c3 ED |
5205 | break; |
5206 | } | |
5207 | break; | |
5208 | default: | |
5209 | break; | |
5210 | } | |
5211 | read_unlock_bh(&idev->lock); | |
fe884c2b | 5212 | cb->args[2] = ip_idx; |
234b27c3 ED |
5213 | return err; |
5214 | } | |
5215 | ||
ed6eff11 DA |
5216 | static int inet6_valid_dump_ifaddr_req(const struct nlmsghdr *nlh, |
5217 | struct inet6_fill_args *fillargs, | |
5218 | struct net **tgt_net, struct sock *sk, | |
6371a71f | 5219 | struct netlink_callback *cb) |
ed6eff11 | 5220 | { |
6371a71f | 5221 | struct netlink_ext_ack *extack = cb->extack; |
ed6eff11 DA |
5222 | struct nlattr *tb[IFA_MAX+1]; |
5223 | struct ifaddrmsg *ifm; | |
5224 | int err, i; | |
5225 | ||
5226 | if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) { | |
5227 | NL_SET_ERR_MSG_MOD(extack, "Invalid header for address dump request"); | |
5228 | return -EINVAL; | |
5229 | } | |
5230 | ||
5231 | ifm = nlmsg_data(nlh); | |
5232 | if (ifm->ifa_prefixlen || ifm->ifa_flags || ifm->ifa_scope) { | |
5233 | NL_SET_ERR_MSG_MOD(extack, "Invalid values in header for address dump request"); | |
5234 | return -EINVAL; | |
5235 | } | |
6371a71f DA |
5236 | |
5237 | fillargs->ifindex = ifm->ifa_index; | |
5238 | if (fillargs->ifindex) { | |
5239 | cb->answer_flags |= NLM_F_DUMP_FILTERED; | |
5240 | fillargs->flags |= NLM_F_DUMP_FILTERED; | |
ed6eff11 DA |
5241 | } |
5242 | ||
8cb08174 JB |
5243 | err = nlmsg_parse_deprecated_strict(nlh, sizeof(*ifm), tb, IFA_MAX, |
5244 | ifa_ipv6_policy, extack); | |
ed6eff11 DA |
5245 | if (err < 0) |
5246 | return err; | |
5247 | ||
5248 | for (i = 0; i <= IFA_MAX; ++i) { | |
5249 | if (!tb[i]) | |
5250 | continue; | |
5251 | ||
5252 | if (i == IFA_TARGET_NETNSID) { | |
5253 | struct net *net; | |
5254 | ||
5255 | fillargs->netnsid = nla_get_s32(tb[i]); | |
5256 | net = rtnl_get_net_ns_capable(sk, fillargs->netnsid); | |
5257 | if (IS_ERR(net)) { | |
bf4cc40e | 5258 | fillargs->netnsid = -1; |
ed6eff11 DA |
5259 | NL_SET_ERR_MSG_MOD(extack, "Invalid target network namespace id"); |
5260 | return PTR_ERR(net); | |
5261 | } | |
5262 | *tgt_net = net; | |
5263 | } else { | |
5264 | NL_SET_ERR_MSG_MOD(extack, "Unsupported attribute in dump request"); | |
5265 | return -EINVAL; | |
5266 | } | |
5267 | } | |
5268 | ||
5269 | return 0; | |
5270 | } | |
5271 | ||
1da177e4 LT |
5272 | static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb, |
5273 | enum addr_type_t type) | |
5274 | { | |
ed6eff11 | 5275 | const struct nlmsghdr *nlh = cb->nlh; |
6ba1e6e8 DA |
5276 | struct inet6_fill_args fillargs = { |
5277 | .portid = NETLINK_CB(cb->skb).portid, | |
5278 | .seq = cb->nlh->nlmsg_seq, | |
5279 | .flags = NLM_F_MULTI, | |
5280 | .netnsid = -1, | |
5281 | .type = type, | |
5282 | }; | |
87117baf | 5283 | struct net *tgt_net = sock_net(skb->sk); |
fe884c2b | 5284 | int idx, s_idx, s_ip_idx; |
234b27c3 | 5285 | int h, s_h; |
1da177e4 | 5286 | struct net_device *dev; |
234b27c3 ED |
5287 | struct inet6_dev *idev; |
5288 | struct hlist_head *head; | |
242afaa6 | 5289 | int err = 0; |
1ab1457c | 5290 | |
234b27c3 ED |
5291 | s_h = cb->args[0]; |
5292 | s_idx = idx = cb->args[1]; | |
fe884c2b | 5293 | s_ip_idx = cb->args[2]; |
5d5619b4 | 5294 | |
ed6eff11 | 5295 | if (cb->strict_check) { |
ed6eff11 | 5296 | err = inet6_valid_dump_ifaddr_req(nlh, &fillargs, &tgt_net, |
6371a71f | 5297 | skb->sk, cb); |
ed6eff11 | 5298 | if (err < 0) |
242afaa6 | 5299 | goto put_tgt_net; |
6371a71f | 5300 | |
242afaa6 | 5301 | err = 0; |
6371a71f DA |
5302 | if (fillargs.ifindex) { |
5303 | dev = __dev_get_by_index(tgt_net, fillargs.ifindex); | |
242afaa6 DA |
5304 | if (!dev) { |
5305 | err = -ENODEV; | |
5306 | goto put_tgt_net; | |
5307 | } | |
6371a71f DA |
5308 | idev = __in6_dev_get(dev); |
5309 | if (idev) { | |
5310 | err = in6_dump_addrs(idev, skb, cb, s_ip_idx, | |
5311 | &fillargs); | |
1518039f JK |
5312 | if (err > 0) |
5313 | err = 0; | |
6371a71f DA |
5314 | } |
5315 | goto put_tgt_net; | |
5316 | } | |
6ecf4c37 CB |
5317 | } |
5318 | ||
234b27c3 | 5319 | rcu_read_lock(); |
6ecf4c37 | 5320 | cb->seq = atomic_read(&tgt_net->ipv6.dev_addr_genid) ^ tgt_net->dev_base_seq; |
234b27c3 ED |
5321 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { |
5322 | idx = 0; | |
6ecf4c37 | 5323 | head = &tgt_net->dev_index_head[h]; |
b67bfe0d | 5324 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
234b27c3 ED |
5325 | if (idx < s_idx) |
5326 | goto cont; | |
4b97efdf | 5327 | if (h > s_h || idx > s_idx) |
234b27c3 | 5328 | s_ip_idx = 0; |
e21e8467 SH |
5329 | idev = __in6_dev_get(dev); |
5330 | if (!idev) | |
234b27c3 ED |
5331 | goto cont; |
5332 | ||
fe884c2b | 5333 | if (in6_dump_addrs(idev, skb, cb, s_ip_idx, |
6ba1e6e8 | 5334 | &fillargs) < 0) |
234b27c3 | 5335 | goto done; |
7562f876 | 5336 | cont: |
234b27c3 ED |
5337 | idx++; |
5338 | } | |
1da177e4 | 5339 | } |
234b27c3 ED |
5340 | done: |
5341 | rcu_read_unlock(); | |
5342 | cb->args[0] = h; | |
5343 | cb->args[1] = idx; | |
6371a71f | 5344 | put_tgt_net: |
6ba1e6e8 | 5345 | if (fillargs.netnsid >= 0) |
6ecf4c37 | 5346 | put_net(tgt_net); |
234b27c3 | 5347 | |
7c1e8a38 | 5348 | return skb->len ? : err; |
1da177e4 LT |
5349 | } |
5350 | ||
5351 | static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
5352 | { | |
5353 | enum addr_type_t type = UNICAST_ADDR; | |
b854272b | 5354 | |
1da177e4 LT |
5355 | return inet6_dump_addr(skb, cb, type); |
5356 | } | |
5357 | ||
5358 | static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
5359 | { | |
5360 | enum addr_type_t type = MULTICAST_ADDR; | |
b854272b | 5361 | |
1da177e4 LT |
5362 | return inet6_dump_addr(skb, cb, type); |
5363 | } | |
5364 | ||
5365 | ||
5366 | static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
5367 | { | |
5368 | enum addr_type_t type = ANYCAST_ADDR; | |
b854272b | 5369 | |
1da177e4 LT |
5370 | return inet6_dump_addr(skb, cb, type); |
5371 | } | |
5372 | ||
4b1373de JK |
5373 | static int inet6_rtm_valid_getaddr_req(struct sk_buff *skb, |
5374 | const struct nlmsghdr *nlh, | |
5375 | struct nlattr **tb, | |
5376 | struct netlink_ext_ack *extack) | |
5377 | { | |
5378 | struct ifaddrmsg *ifm; | |
5379 | int i, err; | |
5380 | ||
5381 | if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) { | |
5382 | NL_SET_ERR_MSG_MOD(extack, "Invalid header for get address request"); | |
5383 | return -EINVAL; | |
5384 | } | |
5385 | ||
2beb6d29 HL |
5386 | if (!netlink_strict_get_check(skb)) |
5387 | return nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFA_MAX, | |
5388 | ifa_ipv6_policy, extack); | |
5389 | ||
4b1373de JK |
5390 | ifm = nlmsg_data(nlh); |
5391 | if (ifm->ifa_prefixlen || ifm->ifa_flags || ifm->ifa_scope) { | |
5392 | NL_SET_ERR_MSG_MOD(extack, "Invalid values in header for get address request"); | |
5393 | return -EINVAL; | |
5394 | } | |
5395 | ||
8cb08174 JB |
5396 | err = nlmsg_parse_deprecated_strict(nlh, sizeof(*ifm), tb, IFA_MAX, |
5397 | ifa_ipv6_policy, extack); | |
4b1373de JK |
5398 | if (err) |
5399 | return err; | |
5400 | ||
5401 | for (i = 0; i <= IFA_MAX; i++) { | |
5402 | if (!tb[i]) | |
5403 | continue; | |
5404 | ||
5405 | switch (i) { | |
5406 | case IFA_TARGET_NETNSID: | |
5407 | case IFA_ADDRESS: | |
5408 | case IFA_LOCAL: | |
5409 | break; | |
5410 | default: | |
5411 | NL_SET_ERR_MSG_MOD(extack, "Unsupported attribute in get address request"); | |
5412 | return -EINVAL; | |
5413 | } | |
5414 | } | |
5415 | ||
5416 | return 0; | |
5417 | } | |
5418 | ||
c21ef3e3 DA |
5419 | static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr *nlh, |
5420 | struct netlink_ext_ack *extack) | |
6c223828 | 5421 | { |
87117baf | 5422 | struct net *tgt_net = sock_net(in_skb->sk); |
203651b6 CB |
5423 | struct inet6_fill_args fillargs = { |
5424 | .portid = NETLINK_CB(in_skb).portid, | |
5425 | .seq = nlh->nlmsg_seq, | |
5426 | .event = RTM_NEWADDR, | |
5427 | .flags = 0, | |
5428 | .netnsid = -1, | |
5429 | }; | |
1b29fc2c TG |
5430 | struct ifaddrmsg *ifm; |
5431 | struct nlattr *tb[IFA_MAX+1]; | |
caeaba79 | 5432 | struct in6_addr *addr = NULL, *peer; |
6c223828 NT |
5433 | struct net_device *dev = NULL; |
5434 | struct inet6_ifaddr *ifa; | |
5435 | struct sk_buff *skb; | |
6c223828 NT |
5436 | int err; |
5437 | ||
4b1373de | 5438 | err = inet6_rtm_valid_getaddr_req(in_skb, nlh, tb, extack); |
1b29fc2c | 5439 | if (err < 0) |
c24675f8 | 5440 | return err; |
1b29fc2c | 5441 | |
6ecf4c37 | 5442 | if (tb[IFA_TARGET_NETNSID]) { |
203651b6 | 5443 | fillargs.netnsid = nla_get_s32(tb[IFA_TARGET_NETNSID]); |
6ecf4c37 CB |
5444 | |
5445 | tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(in_skb).sk, | |
203651b6 | 5446 | fillargs.netnsid); |
6ecf4c37 CB |
5447 | if (IS_ERR(tgt_net)) |
5448 | return PTR_ERR(tgt_net); | |
5449 | } | |
5450 | ||
caeaba79 | 5451 | addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer); |
c24675f8 FW |
5452 | if (!addr) |
5453 | return -EINVAL; | |
6c223828 | 5454 | |
1b29fc2c | 5455 | ifm = nlmsg_data(nlh); |
6c223828 | 5456 | if (ifm->ifa_index) |
6ecf4c37 | 5457 | dev = dev_get_by_index(tgt_net, ifm->ifa_index); |
6c223828 | 5458 | |
6ecf4c37 | 5459 | ifa = ipv6_get_ifaddr(tgt_net, addr, dev, 1); |
e21e8467 | 5460 | if (!ifa) { |
1b29fc2c TG |
5461 | err = -EADDRNOTAVAIL; |
5462 | goto errout; | |
5463 | } | |
6c223828 | 5464 | |
e21e8467 SH |
5465 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL); |
5466 | if (!skb) { | |
6c223828 | 5467 | err = -ENOBUFS; |
1b29fc2c | 5468 | goto errout_ifa; |
6c223828 NT |
5469 | } |
5470 | ||
203651b6 | 5471 | err = inet6_fill_ifaddr(skb, ifa, &fillargs); |
26932566 PM |
5472 | if (err < 0) { |
5473 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
5474 | WARN_ON(err == -EMSGSIZE); | |
5475 | kfree_skb(skb); | |
5476 | goto errout_ifa; | |
5477 | } | |
6ecf4c37 | 5478 | err = rtnl_unicast(skb, tgt_net, NETLINK_CB(in_skb).portid); |
1b29fc2c | 5479 | errout_ifa: |
6c223828 | 5480 | in6_ifa_put(ifa); |
1b29fc2c | 5481 | errout: |
1160dfa1 | 5482 | dev_put(dev); |
203651b6 | 5483 | if (fillargs.netnsid >= 0) |
6ecf4c37 CB |
5484 | put_net(tgt_net); |
5485 | ||
6c223828 | 5486 | return err; |
6c223828 NT |
5487 | } |
5488 | ||
1da177e4 LT |
5489 | static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) |
5490 | { | |
5491 | struct sk_buff *skb; | |
c346dca1 | 5492 | struct net *net = dev_net(ifa->idev->dev); |
203651b6 CB |
5493 | struct inet6_fill_args fillargs = { |
5494 | .portid = 0, | |
5495 | .seq = 0, | |
5496 | .event = event, | |
5497 | .flags = 0, | |
5498 | .netnsid = -1, | |
5499 | }; | |
5d620266 | 5500 | int err = -ENOBUFS; |
1da177e4 | 5501 | |
0ab6803b | 5502 | skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); |
63159f29 | 5503 | if (!skb) |
5d620266 TG |
5504 | goto errout; |
5505 | ||
203651b6 | 5506 | err = inet6_fill_ifaddr(skb, ifa, &fillargs); |
26932566 PM |
5507 | if (err < 0) { |
5508 | /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */ | |
5509 | WARN_ON(err == -EMSGSIZE); | |
5510 | kfree_skb(skb); | |
5511 | goto errout; | |
5512 | } | |
1ce85fe4 PNA |
5513 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC); |
5514 | return; | |
5d620266 TG |
5515 | errout: |
5516 | if (err < 0) | |
6fda7350 | 5517 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err); |
1da177e4 LT |
5518 | } |
5519 | ||
b6f99a21 | 5520 | static inline void ipv6_store_devconf(struct ipv6_devconf *cnf, |
1da177e4 LT |
5521 | __s32 *array, int bytes) |
5522 | { | |
04561c1f TG |
5523 | BUG_ON(bytes < (DEVCONF_MAX * 4)); |
5524 | ||
1da177e4 LT |
5525 | memset(array, 0, bytes); |
5526 | array[DEVCONF_FORWARDING] = cnf->forwarding; | |
5527 | array[DEVCONF_HOPLIMIT] = cnf->hop_limit; | |
5528 | array[DEVCONF_MTU6] = cnf->mtu6; | |
5529 | array[DEVCONF_ACCEPT_RA] = cnf->accept_ra; | |
5530 | array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects; | |
5531 | array[DEVCONF_AUTOCONF] = cnf->autoconf; | |
5532 | array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits; | |
5533 | array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits; | |
93908d19 TG |
5534 | array[DEVCONF_RTR_SOLICIT_INTERVAL] = |
5535 | jiffies_to_msecs(cnf->rtr_solicit_interval); | |
bd11f074 MŻ |
5536 | array[DEVCONF_RTR_SOLICIT_MAX_INTERVAL] = |
5537 | jiffies_to_msecs(cnf->rtr_solicit_max_interval); | |
93908d19 TG |
5538 | array[DEVCONF_RTR_SOLICIT_DELAY] = |
5539 | jiffies_to_msecs(cnf->rtr_solicit_delay); | |
1da177e4 | 5540 | array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version; |
fc4eba58 HFS |
5541 | array[DEVCONF_MLDV1_UNSOLICITED_REPORT_INTERVAL] = |
5542 | jiffies_to_msecs(cnf->mldv1_unsolicited_report_interval); | |
5543 | array[DEVCONF_MLDV2_UNSOLICITED_REPORT_INTERVAL] = | |
5544 | jiffies_to_msecs(cnf->mldv2_unsolicited_report_interval); | |
1da177e4 LT |
5545 | array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr; |
5546 | array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft; | |
5547 | array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft; | |
5548 | array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry; | |
5549 | array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; | |
1da177e4 | 5550 | array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; |
65f5c7c1 | 5551 | array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr; |
6b2e04bc | 5552 | array[DEVCONF_RA_DEFRTR_METRIC] = cnf->ra_defrtr_metric; |
8013d1d7 | 5553 | array[DEVCONF_ACCEPT_RA_MIN_HOP_LIMIT] = cnf->accept_ra_min_hop_limit; |
c4fd30eb | 5554 | array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo; |
930d6ff2 YH |
5555 | #ifdef CONFIG_IPV6_ROUTER_PREF |
5556 | array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref; | |
93908d19 TG |
5557 | array[DEVCONF_RTR_PROBE_INTERVAL] = |
5558 | jiffies_to_msecs(cnf->rtr_probe_interval); | |
fa03ef38 | 5559 | #ifdef CONFIG_IPV6_ROUTE_INFO |
bbea124b | 5560 | array[DEVCONF_ACCEPT_RA_RT_INFO_MIN_PLEN] = cnf->accept_ra_rt_info_min_plen; |
09c884d4 YH |
5561 | array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen; |
5562 | #endif | |
930d6ff2 | 5563 | #endif |
fbea49e1 | 5564 | array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp; |
0bcbc926 | 5565 | array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route; |
95c385b4 NH |
5566 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
5567 | array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad; | |
7fd2561e | 5568 | array[DEVCONF_USE_OPTIMISTIC] = cnf->use_optimistic; |
95c385b4 | 5569 | #endif |
7bc570c8 | 5570 | #ifdef CONFIG_IPV6_MROUTE |
145c7a79 | 5571 | array[DEVCONF_MC_FORWARDING] = atomic_read(&cnf->mc_forwarding); |
7bc570c8 | 5572 | #endif |
778d80be | 5573 | array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6; |
1b34be74 | 5574 | array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad; |
c3faca05 | 5575 | array[DEVCONF_FORCE_TLLAO] = cnf->force_tllao; |
5cb04436 | 5576 | array[DEVCONF_NDISC_NOTIFY] = cnf->ndisc_notify; |
b800c3b9 | 5577 | array[DEVCONF_SUPPRESS_FRAG_NDISC] = cnf->suppress_frag_ndisc; |
d9333196 | 5578 | array[DEVCONF_ACCEPT_RA_FROM_LOCAL] = cnf->accept_ra_from_local; |
c2943f14 | 5579 | array[DEVCONF_ACCEPT_RA_MTU] = cnf->accept_ra_mtu; |
35103d11 | 5580 | array[DEVCONF_IGNORE_ROUTES_WITH_LINKDOWN] = cnf->ignore_routes_with_linkdown; |
3d1bec99 | 5581 | /* we omit DEVCONF_STABLE_SECRET for now */ |
3985e8a3 | 5582 | array[DEVCONF_USE_OIF_ADDRS_ONLY] = cnf->use_oif_addrs_only; |
abbc3043 | 5583 | array[DEVCONF_DROP_UNICAST_IN_L2_MULTICAST] = cnf->drop_unicast_in_l2_multicast; |
7a02bf89 | 5584 | array[DEVCONF_DROP_UNSOLICITED_NA] = cnf->drop_unsolicited_na; |
f1705ec1 | 5585 | array[DEVCONF_KEEP_ADDR_ON_DOWN] = cnf->keep_addr_on_down; |
1ababeba | 5586 | array[DEVCONF_SEG6_ENABLED] = cnf->seg6_enabled; |
bf355b8d DL |
5587 | #ifdef CONFIG_IPV6_SEG6_HMAC |
5588 | array[DEVCONF_SEG6_REQUIRE_HMAC] = cnf->seg6_require_hmac; | |
5589 | #endif | |
adc176c5 | 5590 | array[DEVCONF_ENHANCED_DAD] = cnf->enhanced_dad; |
d35a00b8 | 5591 | array[DEVCONF_ADDR_GEN_MODE] = cnf->addr_gen_mode; |
df789fe7 | 5592 | array[DEVCONF_DISABLE_POLICY] = cnf->disable_policy; |
2210d6b2 | 5593 | array[DEVCONF_NDISC_TCLASS] = cnf->ndisc_tclass; |
8610c7c6 | 5594 | array[DEVCONF_RPL_SEG_ENABLED] = cnf->rpl_seg_enabled; |
9ee11f0f JI |
5595 | array[DEVCONF_IOAM6_ENABLED] = cnf->ioam6_enabled; |
5596 | array[DEVCONF_IOAM6_ID] = cnf->ioam6_id; | |
5597 | array[DEVCONF_IOAM6_ID_WIDE] = cnf->ioam6_id_wide; | |
18ac597a | 5598 | array[DEVCONF_NDISC_EVICT_NOCARRIER] = cnf->ndisc_evict_nocarrier; |
3e0b8f52 | 5599 | array[DEVCONF_ACCEPT_UNTRACKED_NA] = cnf->accept_untracked_na; |
1da177e4 LT |
5600 | } |
5601 | ||
b382b191 TG |
5602 | static inline size_t inet6_ifla6_size(void) |
5603 | { | |
5604 | return nla_total_size(4) /* IFLA_INET6_FLAGS */ | |
5605 | + nla_total_size(sizeof(struct ifla_cacheinfo)) | |
5606 | + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */ | |
5607 | + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */ | |
f53adae4 | 5608 | + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */ |
bdd72f41 SD |
5609 | + nla_total_size(sizeof(struct in6_addr)) /* IFLA_INET6_TOKEN */ |
5610 | + nla_total_size(1) /* IFLA_INET6_ADDR_GEN_MODE */ | |
49b99da2 | 5611 | + nla_total_size(4) /* IFLA_INET6_RA_MTU */ |
bdd72f41 | 5612 | + 0; |
b382b191 TG |
5613 | } |
5614 | ||
339bf98f TG |
5615 | static inline size_t inet6_if_nlmsg_size(void) |
5616 | { | |
5617 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
5618 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
5619 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ | |
5620 | + nla_total_size(4) /* IFLA_MTU */ | |
5621 | + nla_total_size(4) /* IFLA_LINK */ | |
0344338b | 5622 | + nla_total_size(1) /* IFLA_OPERSTATE */ |
b382b191 | 5623 | + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */ |
339bf98f | 5624 | } |
c5396a31 | 5625 | |
be281e55 | 5626 | static inline void __snmp6_fill_statsdev(u64 *stats, atomic_long_t *mib, |
aca05671 | 5627 | int bytes) |
7f7d9a6b HX |
5628 | { |
5629 | int i; | |
aca05671 | 5630 | int pad = bytes - sizeof(u64) * ICMP6_MIB_MAX; |
7f7d9a6b HX |
5631 | BUG_ON(pad < 0); |
5632 | ||
5633 | /* Use put_unaligned() because stats may not be aligned for u64. */ | |
aca05671 JH |
5634 | put_unaligned(ICMP6_MIB_MAX, &stats[0]); |
5635 | for (i = 1; i < ICMP6_MIB_MAX; i++) | |
be281e55 | 5636 | put_unaligned(atomic_long_read(&mib[i]), &stats[i]); |
7f7d9a6b | 5637 | |
aca05671 | 5638 | memset(&stats[ICMP6_MIB_MAX], 0, pad); |
7f7d9a6b HX |
5639 | } |
5640 | ||
698365fa | 5641 | static inline void __snmp6_fill_stats64(u64 *stats, void __percpu *mib, |
a3a77372 | 5642 | int bytes, size_t syncpoff) |
4ce3c183 | 5643 | { |
a3a77372 R |
5644 | int i, c; |
5645 | u64 buff[IPSTATS_MIB_MAX]; | |
5646 | int pad = bytes - sizeof(u64) * IPSTATS_MIB_MAX; | |
5647 | ||
4ce3c183 ED |
5648 | BUG_ON(pad < 0); |
5649 | ||
a3a77372 R |
5650 | memset(buff, 0, sizeof(buff)); |
5651 | buff[0] = IPSTATS_MIB_MAX; | |
4ce3c183 | 5652 | |
a3a77372 R |
5653 | for_each_possible_cpu(c) { |
5654 | for (i = 1; i < IPSTATS_MIB_MAX; i++) | |
5655 | buff[i] += snmp_get_cpu_field64(mib, c, i, syncpoff); | |
5656 | } | |
5657 | ||
5658 | memcpy(stats, buff, IPSTATS_MIB_MAX * sizeof(u64)); | |
5659 | memset(&stats[IPSTATS_MIB_MAX], 0, pad); | |
4ce3c183 ED |
5660 | } |
5661 | ||
7f7d9a6b HX |
5662 | static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype, |
5663 | int bytes) | |
5664 | { | |
e21e8467 | 5665 | switch (attrtype) { |
7f7d9a6b | 5666 | case IFLA_INET6_STATS: |
a3a77372 R |
5667 | __snmp6_fill_stats64(stats, idev->stats.ipv6, bytes, |
5668 | offsetof(struct ipstats_mib, syncp)); | |
7f7d9a6b HX |
5669 | break; |
5670 | case IFLA_INET6_ICMP6STATS: | |
aca05671 | 5671 | __snmp6_fill_statsdev(stats, idev->stats.icmpv6dev->mibs, bytes); |
7f7d9a6b HX |
5672 | break; |
5673 | } | |
5674 | } | |
5675 | ||
d5566fd7 SV |
5676 | static int inet6_fill_ifla6_attrs(struct sk_buff *skb, struct inet6_dev *idev, |
5677 | u32 ext_filter_mask) | |
b382b191 TG |
5678 | { |
5679 | struct nlattr *nla; | |
5680 | struct ifla_cacheinfo ci; | |
5681 | ||
c78679e8 DM |
5682 | if (nla_put_u32(skb, IFLA_INET6_FLAGS, idev->if_flags)) |
5683 | goto nla_put_failure; | |
b382b191 | 5684 | ci.max_reasm_len = IPV6_MAXPLEN; |
24912420 DM |
5685 | ci.tstamp = cstamp_delta(idev->tstamp); |
5686 | ci.reachable_time = jiffies_to_msecs(idev->nd_parms->reachable_time); | |
1f9248e5 | 5687 | ci.retrans_time = jiffies_to_msecs(NEIGH_VAR(idev->nd_parms, RETRANS_TIME)); |
c78679e8 DM |
5688 | if (nla_put(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci)) |
5689 | goto nla_put_failure; | |
b382b191 | 5690 | nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32)); |
63159f29 | 5691 | if (!nla) |
b382b191 TG |
5692 | goto nla_put_failure; |
5693 | ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla)); | |
5694 | ||
5695 | /* XXX - MC not implemented */ | |
5696 | ||
d5566fd7 SV |
5697 | if (ext_filter_mask & RTEXT_FILTER_SKIP_STATS) |
5698 | return 0; | |
5699 | ||
b382b191 | 5700 | nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64)); |
63159f29 | 5701 | if (!nla) |
b382b191 TG |
5702 | goto nla_put_failure; |
5703 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla)); | |
5704 | ||
5705 | nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64)); | |
63159f29 | 5706 | if (!nla) |
b382b191 TG |
5707 | goto nla_put_failure; |
5708 | snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla)); | |
5709 | ||
f53adae4 | 5710 | nla = nla_reserve(skb, IFLA_INET6_TOKEN, sizeof(struct in6_addr)); |
63159f29 | 5711 | if (!nla) |
f53adae4 DB |
5712 | goto nla_put_failure; |
5713 | read_lock_bh(&idev->lock); | |
5714 | memcpy(nla_data(nla), idev->token.s6_addr, nla_len(nla)); | |
5715 | read_unlock_bh(&idev->lock); | |
5716 | ||
0d7982ce ND |
5717 | if (nla_put_u8(skb, IFLA_INET6_ADDR_GEN_MODE, idev->cnf.addr_gen_mode)) |
5718 | goto nla_put_failure; | |
5719 | ||
49b99da2 RY |
5720 | if (idev->ra_mtu && |
5721 | nla_put_u32(skb, IFLA_INET6_RA_MTU, idev->ra_mtu)) | |
5722 | goto nla_put_failure; | |
5723 | ||
b382b191 TG |
5724 | return 0; |
5725 | ||
5726 | nla_put_failure: | |
5727 | return -EMSGSIZE; | |
5728 | } | |
5729 | ||
b1974ed0 AR |
5730 | static size_t inet6_get_link_af_size(const struct net_device *dev, |
5731 | u32 ext_filter_mask) | |
b382b191 TG |
5732 | { |
5733 | if (!__in6_dev_get(dev)) | |
5734 | return 0; | |
5735 | ||
5736 | return inet6_ifla6_size(); | |
5737 | } | |
5738 | ||
d5566fd7 SV |
5739 | static int inet6_fill_link_af(struct sk_buff *skb, const struct net_device *dev, |
5740 | u32 ext_filter_mask) | |
b382b191 TG |
5741 | { |
5742 | struct inet6_dev *idev = __in6_dev_get(dev); | |
5743 | ||
5744 | if (!idev) | |
5745 | return -ENODATA; | |
5746 | ||
d5566fd7 | 5747 | if (inet6_fill_ifla6_attrs(skb, idev, ext_filter_mask) < 0) |
b382b191 TG |
5748 | return -EMSGSIZE; |
5749 | ||
5750 | return 0; | |
5751 | } | |
5752 | ||
3583a4e8 SH |
5753 | static int inet6_set_iftoken(struct inet6_dev *idev, struct in6_addr *token, |
5754 | struct netlink_ext_ack *extack) | |
f53adae4 | 5755 | { |
f53adae4 DB |
5756 | struct inet6_ifaddr *ifp; |
5757 | struct net_device *dev = idev->dev; | |
47e27d5e | 5758 | bool clear_token, update_rs = false; |
dc848292 | 5759 | struct in6_addr ll_addr; |
f53adae4 | 5760 | |
c15b1cca HFS |
5761 | ASSERT_RTNL(); |
5762 | ||
63159f29 | 5763 | if (!token) |
f53adae4 | 5764 | return -EINVAL; |
3583a4e8 SH |
5765 | |
5766 | if (dev->flags & IFF_LOOPBACK) { | |
5767 | NL_SET_ERR_MSG_MOD(extack, "Device is loopback"); | |
f53adae4 | 5768 | return -EINVAL; |
3583a4e8 SH |
5769 | } |
5770 | ||
5771 | if (dev->flags & IFF_NOARP) { | |
5772 | NL_SET_ERR_MSG_MOD(extack, | |
5773 | "Device does not do neighbour discovery"); | |
5774 | return -EINVAL; | |
5775 | } | |
5776 | ||
5777 | if (!ipv6_accept_ra(idev)) { | |
5778 | NL_SET_ERR_MSG_MOD(extack, | |
5779 | "Router advertisement is disabled on device"); | |
f53adae4 | 5780 | return -EINVAL; |
3583a4e8 SH |
5781 | } |
5782 | ||
5783 | if (idev->cnf.rtr_solicits == 0) { | |
5784 | NL_SET_ERR_MSG(extack, | |
5785 | "Router solicitation is disabled on device"); | |
f53adae4 | 5786 | return -EINVAL; |
3583a4e8 | 5787 | } |
f53adae4 DB |
5788 | |
5789 | write_lock_bh(&idev->lock); | |
5790 | ||
5791 | BUILD_BUG_ON(sizeof(token->s6_addr) != 16); | |
5792 | memcpy(idev->token.s6_addr + 8, token->s6_addr + 8, 8); | |
5793 | ||
5794 | write_unlock_bh(&idev->lock); | |
5795 | ||
47e27d5e DB |
5796 | clear_token = ipv6_addr_any(token); |
5797 | if (clear_token) | |
5798 | goto update_lft; | |
5799 | ||
dc848292 HFS |
5800 | if (!idev->dead && (idev->if_flags & IF_READY) && |
5801 | !ipv6_get_lladdr(dev, &ll_addr, IFA_F_TENTATIVE | | |
5802 | IFA_F_OPTIMISTIC)) { | |
fc403832 DB |
5803 | /* If we're not ready, then normal ifup will take care |
5804 | * of this. Otherwise, we need to request our rs here. | |
5805 | */ | |
5806 | ndisc_send_rs(dev, &ll_addr, &in6addr_linklocal_allrouters); | |
5807 | update_rs = true; | |
5808 | } | |
f53adae4 | 5809 | |
47e27d5e | 5810 | update_lft: |
f53adae4 | 5811 | write_lock_bh(&idev->lock); |
fc403832 | 5812 | |
77ecaace | 5813 | if (update_rs) { |
fc403832 | 5814 | idev->if_flags |= IF_RS_SENT; |
bd11f074 MŻ |
5815 | idev->rs_interval = rfc3315_s14_backoff_init( |
5816 | idev->cnf.rtr_solicit_interval); | |
77ecaace | 5817 | idev->rs_probes = 1; |
bd11f074 | 5818 | addrconf_mod_rs_timer(idev, idev->rs_interval); |
77ecaace | 5819 | } |
f53adae4 DB |
5820 | |
5821 | /* Well, that's kinda nasty ... */ | |
5822 | list_for_each_entry(ifp, &idev->addr_list, if_list) { | |
5823 | spin_lock(&ifp->lock); | |
617fe29d | 5824 | if (ifp->tokenized) { |
f53adae4 DB |
5825 | ifp->valid_lft = 0; |
5826 | ifp->prefered_lft = 0; | |
5827 | } | |
5828 | spin_unlock(&ifp->lock); | |
5829 | } | |
5830 | ||
5831 | write_unlock_bh(&idev->lock); | |
b2ed64a9 | 5832 | inet6_ifinfo_notify(RTM_NEWLINK, idev); |
8805d13f | 5833 | addrconf_verify_rtnl(dev_net(dev)); |
f53adae4 DB |
5834 | return 0; |
5835 | } | |
5836 | ||
11b1f828 DB |
5837 | static const struct nla_policy inet6_af_policy[IFLA_INET6_MAX + 1] = { |
5838 | [IFLA_INET6_ADDR_GEN_MODE] = { .type = NLA_U8 }, | |
5839 | [IFLA_INET6_TOKEN] = { .len = sizeof(struct in6_addr) }, | |
49b99da2 RY |
5840 | [IFLA_INET6_RA_MTU] = { .type = NLA_REJECT, |
5841 | .reject_message = | |
5842 | "IFLA_INET6_RA_MTU can not be set" }, | |
11b1f828 DB |
5843 | }; |
5844 | ||
d35a00b8 FJ |
5845 | static int check_addr_gen_mode(int mode) |
5846 | { | |
5847 | if (mode != IN6_ADDR_GEN_MODE_EUI64 && | |
5848 | mode != IN6_ADDR_GEN_MODE_NONE && | |
5849 | mode != IN6_ADDR_GEN_MODE_STABLE_PRIVACY && | |
5850 | mode != IN6_ADDR_GEN_MODE_RANDOM) | |
5851 | return -EINVAL; | |
5852 | return 1; | |
5853 | } | |
5854 | ||
5855 | static int check_stable_privacy(struct inet6_dev *idev, struct net *net, | |
5856 | int mode) | |
5857 | { | |
5858 | if (mode == IN6_ADDR_GEN_MODE_STABLE_PRIVACY && | |
5859 | !idev->cnf.stable_secret.initialized && | |
5860 | !net->ipv6.devconf_dflt->stable_secret.initialized) | |
5861 | return -EINVAL; | |
5862 | return 1; | |
5863 | } | |
5864 | ||
7dc2bcca | 5865 | static int inet6_validate_link_af(const struct net_device *dev, |
8679c31e RY |
5866 | const struct nlattr *nla, |
5867 | struct netlink_ext_ack *extack) | |
7dc2bcca MM |
5868 | { |
5869 | struct nlattr *tb[IFLA_INET6_MAX + 1]; | |
5870 | struct inet6_dev *idev = NULL; | |
5871 | int err; | |
5872 | ||
5873 | if (dev) { | |
5874 | idev = __in6_dev_get(dev); | |
5875 | if (!idev) | |
5876 | return -EAFNOSUPPORT; | |
5877 | } | |
5878 | ||
5879 | err = nla_parse_nested_deprecated(tb, IFLA_INET6_MAX, nla, | |
8679c31e | 5880 | inet6_af_policy, extack); |
7dc2bcca MM |
5881 | if (err) |
5882 | return err; | |
5883 | ||
5884 | if (!tb[IFLA_INET6_TOKEN] && !tb[IFLA_INET6_ADDR_GEN_MODE]) | |
5885 | return -EINVAL; | |
5886 | ||
5887 | if (tb[IFLA_INET6_ADDR_GEN_MODE]) { | |
5888 | u8 mode = nla_get_u8(tb[IFLA_INET6_ADDR_GEN_MODE]); | |
5889 | ||
5890 | if (check_addr_gen_mode(mode) < 0) | |
5891 | return -EINVAL; | |
5892 | if (dev && check_stable_privacy(idev, dev_net(dev), mode) < 0) | |
5893 | return -EINVAL; | |
5894 | } | |
5895 | ||
5896 | return 0; | |
5897 | } | |
5898 | ||
3583a4e8 SH |
5899 | static int inet6_set_link_af(struct net_device *dev, const struct nlattr *nla, |
5900 | struct netlink_ext_ack *extack) | |
f53adae4 | 5901 | { |
f53adae4 DB |
5902 | struct inet6_dev *idev = __in6_dev_get(dev); |
5903 | struct nlattr *tb[IFLA_INET6_MAX + 1]; | |
7dc2bcca | 5904 | int err; |
f53adae4 | 5905 | |
db3fa271 ED |
5906 | if (!idev) |
5907 | return -EAFNOSUPPORT; | |
5908 | ||
8cb08174 | 5909 | if (nla_parse_nested_deprecated(tb, IFLA_INET6_MAX, nla, NULL, NULL) < 0) |
5ac6b198 | 5910 | return -EINVAL; |
f53adae4 | 5911 | |
bc91b0f0 | 5912 | if (tb[IFLA_INET6_TOKEN]) { |
3583a4e8 SH |
5913 | err = inet6_set_iftoken(idev, nla_data(tb[IFLA_INET6_TOKEN]), |
5914 | extack); | |
bc91b0f0 JP |
5915 | if (err) |
5916 | return err; | |
5917 | } | |
5918 | ||
5919 | if (tb[IFLA_INET6_ADDR_GEN_MODE]) { | |
5920 | u8 mode = nla_get_u8(tb[IFLA_INET6_ADDR_GEN_MODE]); | |
5921 | ||
d35a00b8 | 5922 | idev->cnf.addr_gen_mode = mode; |
bc91b0f0 | 5923 | } |
f53adae4 | 5924 | |
7dc2bcca | 5925 | return 0; |
f53adae4 DB |
5926 | } |
5927 | ||
1ab1457c | 5928 | static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, |
15e47304 | 5929 | u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4 | 5930 | { |
04561c1f | 5931 | struct net_device *dev = idev->dev; |
04561c1f TG |
5932 | struct ifinfomsg *hdr; |
5933 | struct nlmsghdr *nlh; | |
5934 | void *protoinfo; | |
04561c1f | 5935 | |
15e47304 | 5936 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*hdr), flags); |
63159f29 | 5937 | if (!nlh) |
26932566 | 5938 | return -EMSGSIZE; |
04561c1f TG |
5939 | |
5940 | hdr = nlmsg_data(nlh); | |
5941 | hdr->ifi_family = AF_INET6; | |
5942 | hdr->__ifi_pad = 0; | |
5943 | hdr->ifi_type = dev->type; | |
5944 | hdr->ifi_index = dev->ifindex; | |
5945 | hdr->ifi_flags = dev_get_flags(dev); | |
5946 | hdr->ifi_change = 0; | |
5947 | ||
c78679e8 DM |
5948 | if (nla_put_string(skb, IFLA_IFNAME, dev->name) || |
5949 | (dev->addr_len && | |
5950 | nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || | |
5951 | nla_put_u32(skb, IFLA_MTU, dev->mtu) || | |
a54acb3a | 5952 | (dev->ifindex != dev_get_iflink(dev) && |
0344338b AG |
5953 | nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) || |
5954 | nla_put_u8(skb, IFLA_OPERSTATE, | |
5955 | netif_running(dev) ? dev->operstate : IF_OPER_DOWN)) | |
c78679e8 | 5956 | goto nla_put_failure; |
ae0be8de | 5957 | protoinfo = nla_nest_start_noflag(skb, IFLA_PROTINFO); |
63159f29 | 5958 | if (!protoinfo) |
04561c1f | 5959 | goto nla_put_failure; |
1da177e4 | 5960 | |
d5566fd7 | 5961 | if (inet6_fill_ifla6_attrs(skb, idev, 0) < 0) |
bf99f1bd | 5962 | goto nla_put_failure; |
1da177e4 | 5963 | |
04561c1f | 5964 | nla_nest_end(skb, protoinfo); |
053c095a JB |
5965 | nlmsg_end(skb, nlh); |
5966 | return 0; | |
1da177e4 | 5967 | |
04561c1f | 5968 | nla_put_failure: |
26932566 PM |
5969 | nlmsg_cancel(skb, nlh); |
5970 | return -EMSGSIZE; | |
1da177e4 LT |
5971 | } |
5972 | ||
786e0007 DA |
5973 | static int inet6_valid_dump_ifinfo(const struct nlmsghdr *nlh, |
5974 | struct netlink_ext_ack *extack) | |
5975 | { | |
5976 | struct ifinfomsg *ifm; | |
5977 | ||
5978 | if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) { | |
5979 | NL_SET_ERR_MSG_MOD(extack, "Invalid header for link dump request"); | |
5980 | return -EINVAL; | |
5981 | } | |
5982 | ||
5983 | if (nlmsg_attrlen(nlh, sizeof(*ifm))) { | |
5984 | NL_SET_ERR_MSG_MOD(extack, "Invalid data after header"); | |
5985 | return -EINVAL; | |
5986 | } | |
5987 | ||
5988 | ifm = nlmsg_data(nlh); | |
5989 | if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags || | |
5990 | ifm->ifi_change || ifm->ifi_index) { | |
5991 | NL_SET_ERR_MSG_MOD(extack, "Invalid values in header for dump request"); | |
5992 | return -EINVAL; | |
5993 | } | |
5994 | ||
5995 | return 0; | |
5996 | } | |
5997 | ||
1da177e4 LT |
5998 | static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) |
5999 | { | |
3b1e0a65 | 6000 | struct net *net = sock_net(skb->sk); |
84d2697d | 6001 | int h, s_h; |
434a8a58 | 6002 | int idx = 0, s_idx; |
1da177e4 LT |
6003 | struct net_device *dev; |
6004 | struct inet6_dev *idev; | |
84d2697d | 6005 | struct hlist_head *head; |
1da177e4 | 6006 | |
786e0007 DA |
6007 | /* only requests using strict checking can pass data to |
6008 | * influence the dump | |
6009 | */ | |
6010 | if (cb->strict_check) { | |
6011 | int err = inet6_valid_dump_ifinfo(cb->nlh, cb->extack); | |
6012 | ||
6013 | if (err < 0) | |
6014 | return err; | |
6015 | } | |
6016 | ||
84d2697d ED |
6017 | s_h = cb->args[0]; |
6018 | s_idx = cb->args[1]; | |
6019 | ||
6020 | rcu_read_lock(); | |
6021 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
6022 | idx = 0; | |
6023 | head = &net->dev_index_head[h]; | |
b67bfe0d | 6024 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
84d2697d ED |
6025 | if (idx < s_idx) |
6026 | goto cont; | |
6027 | idev = __in6_dev_get(dev); | |
6028 | if (!idev) | |
6029 | goto cont; | |
6030 | if (inet6_fill_ifinfo(skb, idev, | |
15e47304 | 6031 | NETLINK_CB(cb->skb).portid, |
84d2697d | 6032 | cb->nlh->nlmsg_seq, |
053c095a | 6033 | RTM_NEWLINK, NLM_F_MULTI) < 0) |
84d2697d | 6034 | goto out; |
7562f876 | 6035 | cont: |
84d2697d ED |
6036 | idx++; |
6037 | } | |
1da177e4 | 6038 | } |
84d2697d ED |
6039 | out: |
6040 | rcu_read_unlock(); | |
6041 | cb->args[1] = idx; | |
6042 | cb->args[0] = h; | |
1da177e4 LT |
6043 | |
6044 | return skb->len; | |
6045 | } | |
6046 | ||
6047 | void inet6_ifinfo_notify(int event, struct inet6_dev *idev) | |
6048 | { | |
6049 | struct sk_buff *skb; | |
c346dca1 | 6050 | struct net *net = dev_net(idev->dev); |
8d7a76c9 | 6051 | int err = -ENOBUFS; |
1ab1457c | 6052 | |
339bf98f | 6053 | skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC); |
63159f29 | 6054 | if (!skb) |
8d7a76c9 TG |
6055 | goto errout; |
6056 | ||
6057 | err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0); | |
26932566 PM |
6058 | if (err < 0) { |
6059 | /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */ | |
6060 | WARN_ON(err == -EMSGSIZE); | |
6061 | kfree_skb(skb); | |
6062 | goto errout; | |
6063 | } | |
5f75a104 | 6064 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFINFO, NULL, GFP_ATOMIC); |
1ce85fe4 | 6065 | return; |
8d7a76c9 TG |
6066 | errout: |
6067 | if (err < 0) | |
5f75a104 | 6068 | rtnl_set_sk_err(net, RTNLGRP_IPV6_IFINFO, err); |
1da177e4 LT |
6069 | } |
6070 | ||
339bf98f TG |
6071 | static inline size_t inet6_prefix_nlmsg_size(void) |
6072 | { | |
6073 | return NLMSG_ALIGN(sizeof(struct prefixmsg)) | |
6074 | + nla_total_size(sizeof(struct in6_addr)) | |
6075 | + nla_total_size(sizeof(struct prefix_cacheinfo)); | |
6076 | } | |
c5396a31 | 6077 | |
1da177e4 | 6078 | static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev, |
15e47304 | 6079 | struct prefix_info *pinfo, u32 portid, u32 seq, |
6051e2f4 | 6080 | int event, unsigned int flags) |
1da177e4 | 6081 | { |
6051e2f4 TG |
6082 | struct prefixmsg *pmsg; |
6083 | struct nlmsghdr *nlh; | |
1da177e4 LT |
6084 | struct prefix_cacheinfo ci; |
6085 | ||
15e47304 | 6086 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*pmsg), flags); |
63159f29 | 6087 | if (!nlh) |
26932566 | 6088 | return -EMSGSIZE; |
6051e2f4 TG |
6089 | |
6090 | pmsg = nlmsg_data(nlh); | |
1da177e4 | 6091 | pmsg->prefix_family = AF_INET6; |
8a47077a PM |
6092 | pmsg->prefix_pad1 = 0; |
6093 | pmsg->prefix_pad2 = 0; | |
1da177e4 LT |
6094 | pmsg->prefix_ifindex = idev->dev->ifindex; |
6095 | pmsg->prefix_len = pinfo->prefix_len; | |
6096 | pmsg->prefix_type = pinfo->type; | |
8a47077a | 6097 | pmsg->prefix_pad3 = 0; |
1da177e4 LT |
6098 | pmsg->prefix_flags = 0; |
6099 | if (pinfo->onlink) | |
6100 | pmsg->prefix_flags |= IF_PREFIX_ONLINK; | |
6101 | if (pinfo->autoconf) | |
6102 | pmsg->prefix_flags |= IF_PREFIX_AUTOCONF; | |
6103 | ||
c78679e8 DM |
6104 | if (nla_put(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix)) |
6105 | goto nla_put_failure; | |
1da177e4 LT |
6106 | ci.preferred_time = ntohl(pinfo->prefered); |
6107 | ci.valid_time = ntohl(pinfo->valid); | |
c78679e8 DM |
6108 | if (nla_put(skb, PREFIX_CACHEINFO, sizeof(ci), &ci)) |
6109 | goto nla_put_failure; | |
053c095a JB |
6110 | nlmsg_end(skb, nlh); |
6111 | return 0; | |
1da177e4 | 6112 | |
6051e2f4 | 6113 | nla_put_failure: |
26932566 PM |
6114 | nlmsg_cancel(skb, nlh); |
6115 | return -EMSGSIZE; | |
1da177e4 LT |
6116 | } |
6117 | ||
1ab1457c | 6118 | static void inet6_prefix_notify(int event, struct inet6_dev *idev, |
1da177e4 LT |
6119 | struct prefix_info *pinfo) |
6120 | { | |
6121 | struct sk_buff *skb; | |
c346dca1 | 6122 | struct net *net = dev_net(idev->dev); |
8c384bfa | 6123 | int err = -ENOBUFS; |
1da177e4 | 6124 | |
339bf98f | 6125 | skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC); |
63159f29 | 6126 | if (!skb) |
8c384bfa TG |
6127 | goto errout; |
6128 | ||
6129 | err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0); | |
26932566 PM |
6130 | if (err < 0) { |
6131 | /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */ | |
6132 | WARN_ON(err == -EMSGSIZE); | |
6133 | kfree_skb(skb); | |
6134 | goto errout; | |
6135 | } | |
1ce85fe4 PNA |
6136 | rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC); |
6137 | return; | |
8c384bfa TG |
6138 | errout: |
6139 | if (err < 0) | |
6fda7350 | 6140 | rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err); |
1da177e4 LT |
6141 | } |
6142 | ||
1da177e4 LT |
6143 | static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) |
6144 | { | |
63998ac2 ND |
6145 | struct net *net = dev_net(ifp->idev->dev); |
6146 | ||
c15b1cca HFS |
6147 | if (event) |
6148 | ASSERT_RTNL(); | |
6149 | ||
1da177e4 LT |
6150 | inet6_ifa_notify(event ? : RTM_NEWADDR, ifp); |
6151 | ||
6152 | switch (event) { | |
6153 | case RTM_NEWADDR: | |
95c385b4 | 6154 | /* |
2d819d25 DA |
6155 | * If the address was optimistic we inserted the route at the |
6156 | * start of our DAD process, so we don't need to do it again. | |
6157 | * If the device was taken down in the middle of the DAD | |
6158 | * cycle there is a race where we could get here without a | |
6159 | * host route, so nothing to insert. That will be fixed when | |
6160 | * the device is brought up. | |
95c385b4 | 6161 | */ |
2d819d25 | 6162 | if (ifp->rt && !rcu_access_pointer(ifp->rt->fib6_node)) { |
afb1d4b5 | 6163 | ip6_ins_rt(net, ifp->rt); |
2d819d25 DA |
6164 | } else if (!ifp->rt && (ifp->idev->dev->flags & IFF_UP)) { |
6165 | pr_warn("BUG: Address %pI6c on device %s is missing its host route.\n", | |
6166 | &ifp->addr, ifp->idev->dev->name); | |
6167 | } | |
6168 | ||
1da177e4 LT |
6169 | if (ifp->idev->cnf.forwarding) |
6170 | addrconf_join_anycast(ifp); | |
7996c799 | 6171 | if (!ipv6_addr_any(&ifp->peer_addr)) |
07758eb9 HL |
6172 | addrconf_prefix_route(&ifp->peer_addr, 128, |
6173 | ifp->rt_priority, ifp->idev->dev, | |
6174 | 0, 0, GFP_ATOMIC); | |
1da177e4 LT |
6175 | break; |
6176 | case RTM_DELADDR: | |
6177 | if (ifp->idev->cnf.forwarding) | |
6178 | addrconf_leave_anycast(ifp); | |
6179 | addrconf_leave_solict(ifp->idev, &ifp->addr); | |
7996c799 | 6180 | if (!ipv6_addr_any(&ifp->peer_addr)) { |
8d1c802b | 6181 | struct fib6_info *rt; |
caeaba79 | 6182 | |
e7478dfc | 6183 | rt = addrconf_get_prefix_route(&ifp->peer_addr, 128, |
2b2450ca DA |
6184 | ifp->idev->dev, 0, 0, |
6185 | false); | |
8e3d5be7 | 6186 | if (rt) |
11dd74b3 | 6187 | ip6_del_rt(net, rt, false); |
caeaba79 | 6188 | } |
38bd10c4 | 6189 | if (ifp->rt) { |
11dd74b3 | 6190 | ip6_del_rt(net, ifp->rt, false); |
93531c67 | 6191 | ifp->rt = NULL; |
38bd10c4 | 6192 | } |
705f1c86 | 6193 | rt_genid_bump_ipv6(net); |
1da177e4 LT |
6194 | break; |
6195 | } | |
63998ac2 | 6196 | atomic_inc(&net->ipv6.dev_addr_genid); |
1da177e4 LT |
6197 | } |
6198 | ||
6199 | static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) | |
6200 | { | |
1da177e4 LT |
6201 | if (likely(ifp->idev->dead == 0)) |
6202 | __ipv6_ifa_notify(event, ifp); | |
1da177e4 LT |
6203 | } |
6204 | ||
6205 | #ifdef CONFIG_SYSCTL | |
6206 | ||
32927393 CH |
6207 | static int addrconf_sysctl_forward(struct ctl_table *ctl, int write, |
6208 | void *buffer, size_t *lenp, loff_t *ppos) | |
1da177e4 LT |
6209 | { |
6210 | int *valp = ctl->data; | |
6211 | int val = *valp; | |
88af182e | 6212 | loff_t pos = *ppos; |
fe2c6338 | 6213 | struct ctl_table lctl; |
1da177e4 LT |
6214 | int ret; |
6215 | ||
013d97e9 FR |
6216 | /* |
6217 | * ctl->data points to idev->cnf.forwarding, we should | |
6218 | * not modify it until we get the rtnl lock. | |
6219 | */ | |
6220 | lctl = *ctl; | |
6221 | lctl.data = &val; | |
6222 | ||
6223 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); | |
1da177e4 | 6224 | |
c8fecf22 | 6225 | if (write) |
b325fddb | 6226 | ret = addrconf_fixup_forwarding(ctl, valp, val); |
88af182e EB |
6227 | if (ret) |
6228 | *ppos = pos; | |
1ab1457c | 6229 | return ret; |
1da177e4 LT |
6230 | } |
6231 | ||
32927393 CH |
6232 | static int addrconf_sysctl_mtu(struct ctl_table *ctl, int write, |
6233 | void *buffer, size_t *lenp, loff_t *ppos) | |
77751427 ML |
6234 | { |
6235 | struct inet6_dev *idev = ctl->extra1; | |
6236 | int min_mtu = IPV6_MIN_MTU; | |
6237 | struct ctl_table lctl; | |
6238 | ||
6239 | lctl = *ctl; | |
6240 | lctl.extra1 = &min_mtu; | |
6241 | lctl.extra2 = idev ? &idev->dev->mtu : NULL; | |
6242 | ||
6243 | return proc_dointvec_minmax(&lctl, write, buffer, lenp, ppos); | |
6244 | } | |
6245 | ||
56d417b1 BH |
6246 | static void dev_disable_change(struct inet6_dev *idev) |
6247 | { | |
75538c2b CW |
6248 | struct netdev_notifier_info info; |
6249 | ||
56d417b1 BH |
6250 | if (!idev || !idev->dev) |
6251 | return; | |
6252 | ||
75538c2b | 6253 | netdev_notifier_info_init(&info, idev->dev); |
56d417b1 | 6254 | if (idev->cnf.disable_ipv6) |
75538c2b | 6255 | addrconf_notify(NULL, NETDEV_DOWN, &info); |
56d417b1 | 6256 | else |
75538c2b | 6257 | addrconf_notify(NULL, NETDEV_UP, &info); |
56d417b1 BH |
6258 | } |
6259 | ||
6260 | static void addrconf_disable_change(struct net *net, __s32 newf) | |
6261 | { | |
6262 | struct net_device *dev; | |
6263 | struct inet6_dev *idev; | |
6264 | ||
03e4deff | 6265 | for_each_netdev(net, dev) { |
56d417b1 BH |
6266 | idev = __in6_dev_get(dev); |
6267 | if (idev) { | |
6268 | int changed = (!idev->cnf.disable_ipv6) ^ (!newf); | |
6269 | idev->cnf.disable_ipv6 = newf; | |
6270 | if (changed) | |
6271 | dev_disable_change(idev); | |
6272 | } | |
56d417b1 | 6273 | } |
56d417b1 BH |
6274 | } |
6275 | ||
013d97e9 | 6276 | static int addrconf_disable_ipv6(struct ctl_table *table, int *p, int newf) |
56d417b1 BH |
6277 | { |
6278 | struct net *net; | |
013d97e9 FR |
6279 | int old; |
6280 | ||
6281 | if (!rtnl_trylock()) | |
6282 | return restart_syscall(); | |
56d417b1 BH |
6283 | |
6284 | net = (struct net *)table->extra2; | |
013d97e9 FR |
6285 | old = *p; |
6286 | *p = newf; | |
56d417b1 | 6287 | |
013d97e9 FR |
6288 | if (p == &net->ipv6.devconf_dflt->disable_ipv6) { |
6289 | rtnl_unlock(); | |
56d417b1 | 6290 | return 0; |
88af182e | 6291 | } |
56d417b1 BH |
6292 | |
6293 | if (p == &net->ipv6.devconf_all->disable_ipv6) { | |
56d417b1 BH |
6294 | net->ipv6.devconf_dflt->disable_ipv6 = newf; |
6295 | addrconf_disable_change(net, newf); | |
013d97e9 | 6296 | } else if ((!newf) ^ (!old)) |
56d417b1 BH |
6297 | dev_disable_change((struct inet6_dev *)table->extra1); |
6298 | ||
6299 | rtnl_unlock(); | |
6300 | return 0; | |
6301 | } | |
6302 | ||
32927393 CH |
6303 | static int addrconf_sysctl_disable(struct ctl_table *ctl, int write, |
6304 | void *buffer, size_t *lenp, loff_t *ppos) | |
56d417b1 BH |
6305 | { |
6306 | int *valp = ctl->data; | |
6307 | int val = *valp; | |
88af182e | 6308 | loff_t pos = *ppos; |
fe2c6338 | 6309 | struct ctl_table lctl; |
56d417b1 BH |
6310 | int ret; |
6311 | ||
013d97e9 FR |
6312 | /* |
6313 | * ctl->data points to idev->cnf.disable_ipv6, we should | |
6314 | * not modify it until we get the rtnl lock. | |
6315 | */ | |
6316 | lctl = *ctl; | |
6317 | lctl.data = &val; | |
6318 | ||
6319 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); | |
56d417b1 BH |
6320 | |
6321 | if (write) | |
6322 | ret = addrconf_disable_ipv6(ctl, valp, val); | |
88af182e EB |
6323 | if (ret) |
6324 | *ppos = pos; | |
56d417b1 BH |
6325 | return ret; |
6326 | } | |
6327 | ||
32927393 CH |
6328 | static int addrconf_sysctl_proxy_ndp(struct ctl_table *ctl, int write, |
6329 | void *buffer, size_t *lenp, loff_t *ppos) | |
c92d5491 | 6330 | { |
6331 | int *valp = ctl->data; | |
6332 | int ret; | |
6333 | int old, new; | |
6334 | ||
6335 | old = *valp; | |
6336 | ret = proc_dointvec(ctl, write, buffer, lenp, ppos); | |
6337 | new = *valp; | |
6338 | ||
6339 | if (write && old != new) { | |
6340 | struct net *net = ctl->extra2; | |
6341 | ||
6342 | if (!rtnl_trylock()) | |
6343 | return restart_syscall(); | |
6344 | ||
6345 | if (valp == &net->ipv6.devconf_dflt->proxy_ndp) | |
85b3daad DA |
6346 | inet6_netconf_notify_devconf(net, RTM_NEWNETCONF, |
6347 | NETCONFA_PROXY_NEIGH, | |
c92d5491 | 6348 | NETCONFA_IFINDEX_DEFAULT, |
6349 | net->ipv6.devconf_dflt); | |
6350 | else if (valp == &net->ipv6.devconf_all->proxy_ndp) | |
85b3daad DA |
6351 | inet6_netconf_notify_devconf(net, RTM_NEWNETCONF, |
6352 | NETCONFA_PROXY_NEIGH, | |
c92d5491 | 6353 | NETCONFA_IFINDEX_ALL, |
6354 | net->ipv6.devconf_all); | |
6355 | else { | |
6356 | struct inet6_dev *idev = ctl->extra1; | |
6357 | ||
85b3daad DA |
6358 | inet6_netconf_notify_devconf(net, RTM_NEWNETCONF, |
6359 | NETCONFA_PROXY_NEIGH, | |
c92d5491 | 6360 | idev->dev->ifindex, |
6361 | &idev->cnf); | |
6362 | } | |
6363 | rtnl_unlock(); | |
6364 | } | |
6365 | ||
6366 | return ret; | |
6367 | } | |
6368 | ||
d35a00b8 | 6369 | static int addrconf_sysctl_addr_gen_mode(struct ctl_table *ctl, int write, |
32927393 | 6370 | void *buffer, size_t *lenp, |
d35a00b8 FJ |
6371 | loff_t *ppos) |
6372 | { | |
6373 | int ret = 0; | |
c6dbf7aa | 6374 | u32 new_val; |
d35a00b8 FJ |
6375 | struct inet6_dev *idev = (struct inet6_dev *)ctl->extra1; |
6376 | struct net *net = (struct net *)ctl->extra2; | |
c6dbf7aa SD |
6377 | struct ctl_table tmp = { |
6378 | .data = &new_val, | |
6379 | .maxlen = sizeof(new_val), | |
6380 | .mode = ctl->mode, | |
6381 | }; | |
d35a00b8 | 6382 | |
8c171d6c FJ |
6383 | if (!rtnl_trylock()) |
6384 | return restart_syscall(); | |
6385 | ||
c6dbf7aa | 6386 | new_val = *((u32 *)ctl->data); |
d35a00b8 | 6387 | |
c6dbf7aa SD |
6388 | ret = proc_douintvec(&tmp, write, buffer, lenp, ppos); |
6389 | if (ret != 0) | |
6390 | goto out; | |
d35a00b8 | 6391 | |
c6dbf7aa | 6392 | if (write) { |
8c171d6c FJ |
6393 | if (check_addr_gen_mode(new_val) < 0) { |
6394 | ret = -EINVAL; | |
6395 | goto out; | |
6396 | } | |
d35a00b8 | 6397 | |
c6dbf7aa | 6398 | if (idev) { |
8c171d6c FJ |
6399 | if (check_stable_privacy(idev, net, new_val) < 0) { |
6400 | ret = -EINVAL; | |
6401 | goto out; | |
6402 | } | |
d35a00b8 FJ |
6403 | |
6404 | if (idev->cnf.addr_gen_mode != new_val) { | |
6405 | idev->cnf.addr_gen_mode = new_val; | |
23ca0c2c | 6406 | addrconf_init_auto_addrs(idev->dev); |
d35a00b8 | 6407 | } |
f24c5987 SD |
6408 | } else if (&net->ipv6.devconf_all->addr_gen_mode == ctl->data) { |
6409 | struct net_device *dev; | |
6410 | ||
6411 | net->ipv6.devconf_dflt->addr_gen_mode = new_val; | |
6412 | for_each_netdev(net, dev) { | |
6413 | idev = __in6_dev_get(dev); | |
6414 | if (idev && | |
6415 | idev->cnf.addr_gen_mode != new_val) { | |
6416 | idev->cnf.addr_gen_mode = new_val; | |
23ca0c2c | 6417 | addrconf_init_auto_addrs(idev->dev); |
f24c5987 SD |
6418 | } |
6419 | } | |
d35a00b8 | 6420 | } |
c6dbf7aa SD |
6421 | |
6422 | *((u32 *)ctl->data) = new_val; | |
d35a00b8 FJ |
6423 | } |
6424 | ||
8c171d6c FJ |
6425 | out: |
6426 | rtnl_unlock(); | |
6427 | ||
d35a00b8 FJ |
6428 | return ret; |
6429 | } | |
6430 | ||
3d1bec99 | 6431 | static int addrconf_sysctl_stable_secret(struct ctl_table *ctl, int write, |
32927393 | 6432 | void *buffer, size_t *lenp, |
3d1bec99 HFS |
6433 | loff_t *ppos) |
6434 | { | |
6435 | int err; | |
6436 | struct in6_addr addr; | |
6437 | char str[IPV6_MAX_STRLEN]; | |
6438 | struct ctl_table lctl = *ctl; | |
622c81d5 | 6439 | struct net *net = ctl->extra2; |
3d1bec99 HFS |
6440 | struct ipv6_stable_secret *secret = ctl->data; |
6441 | ||
622c81d5 HFS |
6442 | if (&net->ipv6.devconf_all->stable_secret == ctl->data) |
6443 | return -EIO; | |
6444 | ||
3d1bec99 HFS |
6445 | lctl.maxlen = IPV6_MAX_STRLEN; |
6446 | lctl.data = str; | |
6447 | ||
6448 | if (!rtnl_trylock()) | |
6449 | return restart_syscall(); | |
6450 | ||
6451 | if (!write && !secret->initialized) { | |
6452 | err = -EIO; | |
6453 | goto out; | |
6454 | } | |
6455 | ||
5449a5ca WC |
6456 | err = snprintf(str, sizeof(str), "%pI6", &secret->secret); |
6457 | if (err >= sizeof(str)) { | |
6458 | err = -EIO; | |
6459 | goto out; | |
3d1bec99 HFS |
6460 | } |
6461 | ||
6462 | err = proc_dostring(&lctl, write, buffer, lenp, ppos); | |
6463 | if (err || !write) | |
6464 | goto out; | |
6465 | ||
6466 | if (in6_pton(str, -1, addr.in6_u.u6_addr8, -1, NULL) != 1) { | |
6467 | err = -EIO; | |
6468 | goto out; | |
6469 | } | |
6470 | ||
6471 | secret->initialized = true; | |
6472 | secret->secret = addr; | |
6473 | ||
622c81d5 HFS |
6474 | if (&net->ipv6.devconf_dflt->stable_secret == ctl->data) { |
6475 | struct net_device *dev; | |
6476 | ||
6477 | for_each_netdev(net, dev) { | |
6478 | struct inet6_dev *idev = __in6_dev_get(dev); | |
6479 | ||
6480 | if (idev) { | |
d35a00b8 | 6481 | idev->cnf.addr_gen_mode = |
622c81d5 HFS |
6482 | IN6_ADDR_GEN_MODE_STABLE_PRIVACY; |
6483 | } | |
6484 | } | |
6485 | } else { | |
6486 | struct inet6_dev *idev = ctl->extra1; | |
6487 | ||
d35a00b8 | 6488 | idev->cnf.addr_gen_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY; |
622c81d5 HFS |
6489 | } |
6490 | ||
3d1bec99 HFS |
6491 | out: |
6492 | rtnl_unlock(); | |
6493 | ||
6494 | return err; | |
6495 | } | |
c92d5491 | 6496 | |
35103d11 AG |
6497 | static |
6498 | int addrconf_sysctl_ignore_routes_with_linkdown(struct ctl_table *ctl, | |
32927393 | 6499 | int write, void *buffer, |
35103d11 AG |
6500 | size_t *lenp, |
6501 | loff_t *ppos) | |
6502 | { | |
6503 | int *valp = ctl->data; | |
6504 | int val = *valp; | |
6505 | loff_t pos = *ppos; | |
6506 | struct ctl_table lctl; | |
6507 | int ret; | |
6508 | ||
6509 | /* ctl->data points to idev->cnf.ignore_routes_when_linkdown | |
6510 | * we should not modify it until we get the rtnl lock. | |
6511 | */ | |
6512 | lctl = *ctl; | |
6513 | lctl.data = &val; | |
6514 | ||
6515 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); | |
6516 | ||
6517 | if (write) | |
6518 | ret = addrconf_fixup_linkdown(ctl, valp, val); | |
6519 | if (ret) | |
6520 | *ppos = pos; | |
6521 | return ret; | |
6522 | } | |
6523 | ||
df789fe7 DF |
6524 | static |
6525 | void addrconf_set_nopolicy(struct rt6_info *rt, int action) | |
6526 | { | |
6527 | if (rt) { | |
6528 | if (action) | |
6529 | rt->dst.flags |= DST_NOPOLICY; | |
6530 | else | |
6531 | rt->dst.flags &= ~DST_NOPOLICY; | |
6532 | } | |
6533 | } | |
6534 | ||
6535 | static | |
6536 | void addrconf_disable_policy_idev(struct inet6_dev *idev, int val) | |
6537 | { | |
6538 | struct inet6_ifaddr *ifa; | |
6539 | ||
6540 | read_lock_bh(&idev->lock); | |
6541 | list_for_each_entry(ifa, &idev->addr_list, if_list) { | |
6542 | spin_lock(&ifa->lock); | |
6543 | if (ifa->rt) { | |
f88d8ea6 | 6544 | /* host routes only use builtin fib6_nh */ |
1cf844c7 | 6545 | struct fib6_nh *nh = ifa->rt->fib6_nh; |
df789fe7 DF |
6546 | int cpu; |
6547 | ||
66f5d6ce | 6548 | rcu_read_lock(); |
3b6761d1 | 6549 | ifa->rt->dst_nopolicy = val ? true : false; |
f40b6ae2 | 6550 | if (nh->rt6i_pcpu) { |
df789fe7 DF |
6551 | for_each_possible_cpu(cpu) { |
6552 | struct rt6_info **rtp; | |
6553 | ||
f40b6ae2 | 6554 | rtp = per_cpu_ptr(nh->rt6i_pcpu, cpu); |
df789fe7 DF |
6555 | addrconf_set_nopolicy(*rtp, val); |
6556 | } | |
6557 | } | |
66f5d6ce | 6558 | rcu_read_unlock(); |
df789fe7 DF |
6559 | } |
6560 | spin_unlock(&ifa->lock); | |
6561 | } | |
6562 | read_unlock_bh(&idev->lock); | |
6563 | } | |
6564 | ||
6565 | static | |
6566 | int addrconf_disable_policy(struct ctl_table *ctl, int *valp, int val) | |
6567 | { | |
6568 | struct inet6_dev *idev; | |
6569 | struct net *net; | |
6570 | ||
6571 | if (!rtnl_trylock()) | |
6572 | return restart_syscall(); | |
6573 | ||
6574 | *valp = val; | |
6575 | ||
6576 | net = (struct net *)ctl->extra2; | |
6577 | if (valp == &net->ipv6.devconf_dflt->disable_policy) { | |
6578 | rtnl_unlock(); | |
6579 | return 0; | |
6580 | } | |
6581 | ||
6582 | if (valp == &net->ipv6.devconf_all->disable_policy) { | |
6583 | struct net_device *dev; | |
6584 | ||
6585 | for_each_netdev(net, dev) { | |
6586 | idev = __in6_dev_get(dev); | |
6587 | if (idev) | |
6588 | addrconf_disable_policy_idev(idev, val); | |
6589 | } | |
6590 | } else { | |
6591 | idev = (struct inet6_dev *)ctl->extra1; | |
6592 | addrconf_disable_policy_idev(idev, val); | |
6593 | } | |
6594 | ||
6595 | rtnl_unlock(); | |
6596 | return 0; | |
6597 | } | |
6598 | ||
32927393 CH |
6599 | static int addrconf_sysctl_disable_policy(struct ctl_table *ctl, int write, |
6600 | void *buffer, size_t *lenp, loff_t *ppos) | |
df789fe7 DF |
6601 | { |
6602 | int *valp = ctl->data; | |
6603 | int val = *valp; | |
6604 | loff_t pos = *ppos; | |
6605 | struct ctl_table lctl; | |
6606 | int ret; | |
6607 | ||
6608 | lctl = *ctl; | |
6609 | lctl.data = &val; | |
6610 | ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); | |
6611 | ||
6612 | if (write && (*valp != val)) | |
6613 | ret = addrconf_disable_policy(ctl, valp, val); | |
6614 | ||
6615 | if (ret) | |
6616 | *ppos = pos; | |
6617 | ||
6618 | return ret; | |
6619 | } | |
6620 | ||
cb4a4c69 | 6621 | static int minus_one = -1; |
cb9e684e | 6622 | static const int two_five_five = 255; |
176f716c | 6623 | static u32 ioam6_if_id_max = U16_MAX; |
cb9e684e | 6624 | |
607ea7cd | 6625 | static const struct ctl_table addrconf_sysctl[] = { |
5df1f77f KK |
6626 | { |
6627 | .procname = "forwarding", | |
6628 | .data = &ipv6_devconf.forwarding, | |
6629 | .maxlen = sizeof(int), | |
6630 | .mode = 0644, | |
6631 | .proc_handler = addrconf_sysctl_forward, | |
6632 | }, | |
6633 | { | |
6634 | .procname = "hop_limit", | |
6635 | .data = &ipv6_devconf.hop_limit, | |
6636 | .maxlen = sizeof(int), | |
6637 | .mode = 0644, | |
cb9e684e | 6638 | .proc_handler = proc_dointvec_minmax, |
eec4844f | 6639 | .extra1 = (void *)SYSCTL_ONE, |
cb9e684e | 6640 | .extra2 = (void *)&two_five_five, |
5df1f77f KK |
6641 | }, |
6642 | { | |
6643 | .procname = "mtu", | |
6644 | .data = &ipv6_devconf.mtu6, | |
6645 | .maxlen = sizeof(int), | |
6646 | .mode = 0644, | |
6647 | .proc_handler = addrconf_sysctl_mtu, | |
6648 | }, | |
6649 | { | |
6650 | .procname = "accept_ra", | |
6651 | .data = &ipv6_devconf.accept_ra, | |
6652 | .maxlen = sizeof(int), | |
6653 | .mode = 0644, | |
6654 | .proc_handler = proc_dointvec, | |
6655 | }, | |
6656 | { | |
6657 | .procname = "accept_redirects", | |
6658 | .data = &ipv6_devconf.accept_redirects, | |
6659 | .maxlen = sizeof(int), | |
6660 | .mode = 0644, | |
6661 | .proc_handler = proc_dointvec, | |
6662 | }, | |
6663 | { | |
6664 | .procname = "autoconf", | |
6665 | .data = &ipv6_devconf.autoconf, | |
6666 | .maxlen = sizeof(int), | |
6667 | .mode = 0644, | |
6668 | .proc_handler = proc_dointvec, | |
6669 | }, | |
6670 | { | |
6671 | .procname = "dad_transmits", | |
6672 | .data = &ipv6_devconf.dad_transmits, | |
6673 | .maxlen = sizeof(int), | |
6674 | .mode = 0644, | |
6675 | .proc_handler = proc_dointvec, | |
6676 | }, | |
6677 | { | |
6678 | .procname = "router_solicitations", | |
6679 | .data = &ipv6_devconf.rtr_solicits, | |
6680 | .maxlen = sizeof(int), | |
6681 | .mode = 0644, | |
cb4a4c69 MŻ |
6682 | .proc_handler = proc_dointvec_minmax, |
6683 | .extra1 = &minus_one, | |
5df1f77f KK |
6684 | }, |
6685 | { | |
6686 | .procname = "router_solicitation_interval", | |
6687 | .data = &ipv6_devconf.rtr_solicit_interval, | |
6688 | .maxlen = sizeof(int), | |
6689 | .mode = 0644, | |
6690 | .proc_handler = proc_dointvec_jiffies, | |
6691 | }, | |
bd11f074 MŻ |
6692 | { |
6693 | .procname = "router_solicitation_max_interval", | |
6694 | .data = &ipv6_devconf.rtr_solicit_max_interval, | |
6695 | .maxlen = sizeof(int), | |
6696 | .mode = 0644, | |
6697 | .proc_handler = proc_dointvec_jiffies, | |
6698 | }, | |
5df1f77f KK |
6699 | { |
6700 | .procname = "router_solicitation_delay", | |
6701 | .data = &ipv6_devconf.rtr_solicit_delay, | |
6702 | .maxlen = sizeof(int), | |
6703 | .mode = 0644, | |
6704 | .proc_handler = proc_dointvec_jiffies, | |
6705 | }, | |
6706 | { | |
6707 | .procname = "force_mld_version", | |
6708 | .data = &ipv6_devconf.force_mld_version, | |
6709 | .maxlen = sizeof(int), | |
6710 | .mode = 0644, | |
6711 | .proc_handler = proc_dointvec, | |
6712 | }, | |
6713 | { | |
6714 | .procname = "mldv1_unsolicited_report_interval", | |
6715 | .data = | |
6716 | &ipv6_devconf.mldv1_unsolicited_report_interval, | |
6717 | .maxlen = sizeof(int), | |
6718 | .mode = 0644, | |
6719 | .proc_handler = proc_dointvec_ms_jiffies, | |
6720 | }, | |
6721 | { | |
6722 | .procname = "mldv2_unsolicited_report_interval", | |
6723 | .data = | |
6724 | &ipv6_devconf.mldv2_unsolicited_report_interval, | |
6725 | .maxlen = sizeof(int), | |
6726 | .mode = 0644, | |
6727 | .proc_handler = proc_dointvec_ms_jiffies, | |
6728 | }, | |
6729 | { | |
6730 | .procname = "use_tempaddr", | |
6731 | .data = &ipv6_devconf.use_tempaddr, | |
6732 | .maxlen = sizeof(int), | |
6733 | .mode = 0644, | |
6734 | .proc_handler = proc_dointvec, | |
6735 | }, | |
6736 | { | |
6737 | .procname = "temp_valid_lft", | |
6738 | .data = &ipv6_devconf.temp_valid_lft, | |
6739 | .maxlen = sizeof(int), | |
6740 | .mode = 0644, | |
6741 | .proc_handler = proc_dointvec, | |
6742 | }, | |
6743 | { | |
6744 | .procname = "temp_prefered_lft", | |
6745 | .data = &ipv6_devconf.temp_prefered_lft, | |
6746 | .maxlen = sizeof(int), | |
6747 | .mode = 0644, | |
6748 | .proc_handler = proc_dointvec, | |
6749 | }, | |
6750 | { | |
6751 | .procname = "regen_max_retry", | |
6752 | .data = &ipv6_devconf.regen_max_retry, | |
6753 | .maxlen = sizeof(int), | |
6754 | .mode = 0644, | |
6755 | .proc_handler = proc_dointvec, | |
6756 | }, | |
6757 | { | |
6758 | .procname = "max_desync_factor", | |
6759 | .data = &ipv6_devconf.max_desync_factor, | |
6760 | .maxlen = sizeof(int), | |
6761 | .mode = 0644, | |
6762 | .proc_handler = proc_dointvec, | |
6763 | }, | |
6764 | { | |
6765 | .procname = "max_addresses", | |
6766 | .data = &ipv6_devconf.max_addresses, | |
6767 | .maxlen = sizeof(int), | |
6768 | .mode = 0644, | |
6769 | .proc_handler = proc_dointvec, | |
6770 | }, | |
6771 | { | |
6772 | .procname = "accept_ra_defrtr", | |
6773 | .data = &ipv6_devconf.accept_ra_defrtr, | |
6774 | .maxlen = sizeof(int), | |
6775 | .mode = 0644, | |
6776 | .proc_handler = proc_dointvec, | |
6777 | }, | |
6b2e04bc PC |
6778 | { |
6779 | .procname = "ra_defrtr_metric", | |
6780 | .data = &ipv6_devconf.ra_defrtr_metric, | |
6781 | .maxlen = sizeof(u32), | |
6782 | .mode = 0644, | |
6783 | .proc_handler = proc_douintvec_minmax, | |
6784 | .extra1 = (void *)SYSCTL_ONE, | |
6785 | }, | |
5df1f77f KK |
6786 | { |
6787 | .procname = "accept_ra_min_hop_limit", | |
6788 | .data = &ipv6_devconf.accept_ra_min_hop_limit, | |
6789 | .maxlen = sizeof(int), | |
6790 | .mode = 0644, | |
6791 | .proc_handler = proc_dointvec, | |
6792 | }, | |
6793 | { | |
6794 | .procname = "accept_ra_pinfo", | |
6795 | .data = &ipv6_devconf.accept_ra_pinfo, | |
6796 | .maxlen = sizeof(int), | |
6797 | .mode = 0644, | |
6798 | .proc_handler = proc_dointvec, | |
6799 | }, | |
930d6ff2 | 6800 | #ifdef CONFIG_IPV6_ROUTER_PREF |
5df1f77f KK |
6801 | { |
6802 | .procname = "accept_ra_rtr_pref", | |
6803 | .data = &ipv6_devconf.accept_ra_rtr_pref, | |
6804 | .maxlen = sizeof(int), | |
6805 | .mode = 0644, | |
6806 | .proc_handler = proc_dointvec, | |
6807 | }, | |
6808 | { | |
6809 | .procname = "router_probe_interval", | |
6810 | .data = &ipv6_devconf.rtr_probe_interval, | |
6811 | .maxlen = sizeof(int), | |
6812 | .mode = 0644, | |
6813 | .proc_handler = proc_dointvec_jiffies, | |
6814 | }, | |
fa03ef38 | 6815 | #ifdef CONFIG_IPV6_ROUTE_INFO |
bbea124b JS |
6816 | { |
6817 | .procname = "accept_ra_rt_info_min_plen", | |
6818 | .data = &ipv6_devconf.accept_ra_rt_info_min_plen, | |
6819 | .maxlen = sizeof(int), | |
6820 | .mode = 0644, | |
6821 | .proc_handler = proc_dointvec, | |
6822 | }, | |
5df1f77f KK |
6823 | { |
6824 | .procname = "accept_ra_rt_info_max_plen", | |
6825 | .data = &ipv6_devconf.accept_ra_rt_info_max_plen, | |
6826 | .maxlen = sizeof(int), | |
6827 | .mode = 0644, | |
6828 | .proc_handler = proc_dointvec, | |
6829 | }, | |
09c884d4 | 6830 | #endif |
930d6ff2 | 6831 | #endif |
5df1f77f KK |
6832 | { |
6833 | .procname = "proxy_ndp", | |
6834 | .data = &ipv6_devconf.proxy_ndp, | |
6835 | .maxlen = sizeof(int), | |
6836 | .mode = 0644, | |
6837 | .proc_handler = addrconf_sysctl_proxy_ndp, | |
6838 | }, | |
6839 | { | |
6840 | .procname = "accept_source_route", | |
6841 | .data = &ipv6_devconf.accept_source_route, | |
6842 | .maxlen = sizeof(int), | |
6843 | .mode = 0644, | |
6844 | .proc_handler = proc_dointvec, | |
6845 | }, | |
95c385b4 | 6846 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
5df1f77f KK |
6847 | { |
6848 | .procname = "optimistic_dad", | |
6849 | .data = &ipv6_devconf.optimistic_dad, | |
6850 | .maxlen = sizeof(int), | |
6851 | .mode = 0644, | |
6852 | .proc_handler = proc_dointvec, | |
6853 | }, | |
6854 | { | |
6855 | .procname = "use_optimistic", | |
6856 | .data = &ipv6_devconf.use_optimistic, | |
6857 | .maxlen = sizeof(int), | |
6858 | .mode = 0644, | |
6859 | .proc_handler = proc_dointvec, | |
6860 | }, | |
7bc570c8 YH |
6861 | #endif |
6862 | #ifdef CONFIG_IPV6_MROUTE | |
5df1f77f KK |
6863 | { |
6864 | .procname = "mc_forwarding", | |
6865 | .data = &ipv6_devconf.mc_forwarding, | |
6866 | .maxlen = sizeof(int), | |
6867 | .mode = 0444, | |
6868 | .proc_handler = proc_dointvec, | |
6869 | }, | |
95c385b4 | 6870 | #endif |
5df1f77f KK |
6871 | { |
6872 | .procname = "disable_ipv6", | |
6873 | .data = &ipv6_devconf.disable_ipv6, | |
6874 | .maxlen = sizeof(int), | |
6875 | .mode = 0644, | |
6876 | .proc_handler = addrconf_sysctl_disable, | |
6877 | }, | |
6878 | { | |
6879 | .procname = "accept_dad", | |
6880 | .data = &ipv6_devconf.accept_dad, | |
6881 | .maxlen = sizeof(int), | |
6882 | .mode = 0644, | |
6883 | .proc_handler = proc_dointvec, | |
6884 | }, | |
6885 | { | |
6886 | .procname = "force_tllao", | |
6887 | .data = &ipv6_devconf.force_tllao, | |
6888 | .maxlen = sizeof(int), | |
6889 | .mode = 0644, | |
6890 | .proc_handler = proc_dointvec | |
6891 | }, | |
6892 | { | |
6893 | .procname = "ndisc_notify", | |
6894 | .data = &ipv6_devconf.ndisc_notify, | |
6895 | .maxlen = sizeof(int), | |
6896 | .mode = 0644, | |
6897 | .proc_handler = proc_dointvec | |
6898 | }, | |
6899 | { | |
6900 | .procname = "suppress_frag_ndisc", | |
6901 | .data = &ipv6_devconf.suppress_frag_ndisc, | |
6902 | .maxlen = sizeof(int), | |
6903 | .mode = 0644, | |
6904 | .proc_handler = proc_dointvec | |
6905 | }, | |
6906 | { | |
6907 | .procname = "accept_ra_from_local", | |
6908 | .data = &ipv6_devconf.accept_ra_from_local, | |
6909 | .maxlen = sizeof(int), | |
6910 | .mode = 0644, | |
6911 | .proc_handler = proc_dointvec, | |
6912 | }, | |
6913 | { | |
6914 | .procname = "accept_ra_mtu", | |
6915 | .data = &ipv6_devconf.accept_ra_mtu, | |
6916 | .maxlen = sizeof(int), | |
6917 | .mode = 0644, | |
6918 | .proc_handler = proc_dointvec, | |
6919 | }, | |
6920 | { | |
6921 | .procname = "stable_secret", | |
6922 | .data = &ipv6_devconf.stable_secret, | |
6923 | .maxlen = IPV6_MAX_STRLEN, | |
6924 | .mode = 0600, | |
6925 | .proc_handler = addrconf_sysctl_stable_secret, | |
6926 | }, | |
6927 | { | |
6928 | .procname = "use_oif_addrs_only", | |
6929 | .data = &ipv6_devconf.use_oif_addrs_only, | |
6930 | .maxlen = sizeof(int), | |
6931 | .mode = 0644, | |
6932 | .proc_handler = proc_dointvec, | |
6933 | }, | |
6934 | { | |
6935 | .procname = "ignore_routes_with_linkdown", | |
6936 | .data = &ipv6_devconf.ignore_routes_with_linkdown, | |
6937 | .maxlen = sizeof(int), | |
6938 | .mode = 0644, | |
6939 | .proc_handler = addrconf_sysctl_ignore_routes_with_linkdown, | |
6940 | }, | |
6941 | { | |
6942 | .procname = "drop_unicast_in_l2_multicast", | |
6943 | .data = &ipv6_devconf.drop_unicast_in_l2_multicast, | |
6944 | .maxlen = sizeof(int), | |
6945 | .mode = 0644, | |
6946 | .proc_handler = proc_dointvec, | |
6947 | }, | |
6948 | { | |
6949 | .procname = "drop_unsolicited_na", | |
6950 | .data = &ipv6_devconf.drop_unsolicited_na, | |
6951 | .maxlen = sizeof(int), | |
6952 | .mode = 0644, | |
6953 | .proc_handler = proc_dointvec, | |
6954 | }, | |
6955 | { | |
6956 | .procname = "keep_addr_on_down", | |
6957 | .data = &ipv6_devconf.keep_addr_on_down, | |
6958 | .maxlen = sizeof(int), | |
6959 | .mode = 0644, | |
6960 | .proc_handler = proc_dointvec, | |
6961 | ||
6962 | }, | |
1ababeba DL |
6963 | { |
6964 | .procname = "seg6_enabled", | |
6965 | .data = &ipv6_devconf.seg6_enabled, | |
6966 | .maxlen = sizeof(int), | |
6967 | .mode = 0644, | |
6968 | .proc_handler = proc_dointvec, | |
6969 | }, | |
bf355b8d DL |
6970 | #ifdef CONFIG_IPV6_SEG6_HMAC |
6971 | { | |
6972 | .procname = "seg6_require_hmac", | |
6973 | .data = &ipv6_devconf.seg6_require_hmac, | |
6974 | .maxlen = sizeof(int), | |
6975 | .mode = 0644, | |
6976 | .proc_handler = proc_dointvec, | |
6977 | }, | |
6978 | #endif | |
adc176c5 EN |
6979 | { |
6980 | .procname = "enhanced_dad", | |
6981 | .data = &ipv6_devconf.enhanced_dad, | |
6982 | .maxlen = sizeof(int), | |
6983 | .mode = 0644, | |
6984 | .proc_handler = proc_dointvec, | |
6985 | }, | |
d35a00b8 | 6986 | { |
12e64b3b RY |
6987 | .procname = "addr_gen_mode", |
6988 | .data = &ipv6_devconf.addr_gen_mode, | |
6989 | .maxlen = sizeof(int), | |
6990 | .mode = 0644, | |
d35a00b8 FJ |
6991 | .proc_handler = addrconf_sysctl_addr_gen_mode, |
6992 | }, | |
df789fe7 DF |
6993 | { |
6994 | .procname = "disable_policy", | |
6995 | .data = &ipv6_devconf.disable_policy, | |
6996 | .maxlen = sizeof(int), | |
6997 | .mode = 0644, | |
6998 | .proc_handler = addrconf_sysctl_disable_policy, | |
6999 | }, | |
2210d6b2 MŻ |
7000 | { |
7001 | .procname = "ndisc_tclass", | |
7002 | .data = &ipv6_devconf.ndisc_tclass, | |
7003 | .maxlen = sizeof(int), | |
7004 | .mode = 0644, | |
7005 | .proc_handler = proc_dointvec_minmax, | |
eec4844f | 7006 | .extra1 = (void *)SYSCTL_ZERO, |
2210d6b2 MŻ |
7007 | .extra2 = (void *)&two_five_five, |
7008 | }, | |
8610c7c6 AA |
7009 | { |
7010 | .procname = "rpl_seg_enabled", | |
7011 | .data = &ipv6_devconf.rpl_seg_enabled, | |
7012 | .maxlen = sizeof(int), | |
7013 | .mode = 0644, | |
7014 | .proc_handler = proc_dointvec, | |
7015 | }, | |
9ee11f0f JI |
7016 | { |
7017 | .procname = "ioam6_enabled", | |
7018 | .data = &ipv6_devconf.ioam6_enabled, | |
7019 | .maxlen = sizeof(u8), | |
7020 | .mode = 0644, | |
7021 | .proc_handler = proc_dou8vec_minmax, | |
7022 | .extra1 = (void *)SYSCTL_ZERO, | |
7023 | .extra2 = (void *)SYSCTL_ONE, | |
7024 | }, | |
7025 | { | |
7026 | .procname = "ioam6_id", | |
7027 | .data = &ipv6_devconf.ioam6_id, | |
7028 | .maxlen = sizeof(u32), | |
7029 | .mode = 0644, | |
7030 | .proc_handler = proc_douintvec_minmax, | |
7031 | .extra1 = (void *)SYSCTL_ZERO, | |
7032 | .extra2 = (void *)&ioam6_if_id_max, | |
7033 | }, | |
7034 | { | |
7035 | .procname = "ioam6_id_wide", | |
7036 | .data = &ipv6_devconf.ioam6_id_wide, | |
7037 | .maxlen = sizeof(u32), | |
7038 | .mode = 0644, | |
7039 | .proc_handler = proc_douintvec, | |
7040 | }, | |
18ac597a JP |
7041 | { |
7042 | .procname = "ndisc_evict_nocarrier", | |
7043 | .data = &ipv6_devconf.ndisc_evict_nocarrier, | |
7044 | .maxlen = sizeof(u8), | |
7045 | .mode = 0644, | |
7046 | .proc_handler = proc_dou8vec_minmax, | |
7047 | .extra1 = (void *)SYSCTL_ZERO, | |
7048 | .extra2 = (void *)SYSCTL_ONE, | |
7049 | }, | |
f9a2fb73 | 7050 | { |
3e0b8f52 AA |
7051 | .procname = "accept_untracked_na", |
7052 | .data = &ipv6_devconf.accept_untracked_na, | |
f9a2fb73 AA |
7053 | .maxlen = sizeof(int), |
7054 | .mode = 0644, | |
b66eb3a6 JP |
7055 | .proc_handler = proc_dointvec_minmax, |
7056 | .extra1 = SYSCTL_ZERO, | |
7057 | .extra2 = SYSCTL_TWO, | |
f9a2fb73 | 7058 | }, |
5df1f77f KK |
7059 | { |
7060 | /* sentinel */ | |
7061 | } | |
1da177e4 LT |
7062 | }; |
7063 | ||
bff16c2f | 7064 | static int __addrconf_sysctl_register(struct net *net, char *dev_name, |
f8572d8f | 7065 | struct inet6_dev *idev, struct ipv6_devconf *p) |
1da177e4 | 7066 | { |
29c994e3 | 7067 | int i, ifindex; |
607ea7cd | 7068 | struct ctl_table *table; |
6105e293 | 7069 | char path[sizeof("net/ipv6/conf/") + IFNAMSIZ]; |
1dab6222 | 7070 | |
425b9c7f | 7071 | table = kmemdup(addrconf_sysctl, sizeof(addrconf_sysctl), GFP_KERNEL_ACCOUNT); |
607ea7cd | 7072 | if (!table) |
f68635e6 PE |
7073 | goto out; |
7074 | ||
607ea7cd KK |
7075 | for (i = 0; table[i].data; i++) { |
7076 | table[i].data += (char *)p - (char *)&ipv6_devconf; | |
cb9e684e MŻ |
7077 | /* If one of these is already set, then it is not safe to |
7078 | * overwrite either of them: this makes proc_dointvec_minmax | |
7079 | * usable. | |
7080 | */ | |
7081 | if (!table[i].extra1 && !table[i].extra2) { | |
7082 | table[i].extra1 = idev; /* embedded; no ref */ | |
7083 | table[i].extra2 = net; | |
7084 | } | |
1da177e4 | 7085 | } |
1da177e4 | 7086 | |
6105e293 | 7087 | snprintf(path, sizeof(path), "net/ipv6/conf/%s", dev_name); |
1da177e4 | 7088 | |
607ea7cd KK |
7089 | p->sysctl_header = register_net_sysctl(net, path, table); |
7090 | if (!p->sysctl_header) | |
6105e293 | 7091 | goto free; |
f68635e6 | 7092 | |
29c994e3 ND |
7093 | if (!strcmp(dev_name, "all")) |
7094 | ifindex = NETCONFA_IFINDEX_ALL; | |
7095 | else if (!strcmp(dev_name, "default")) | |
7096 | ifindex = NETCONFA_IFINDEX_DEFAULT; | |
7097 | else | |
7098 | ifindex = idev->dev->ifindex; | |
85b3daad DA |
7099 | inet6_netconf_notify_devconf(net, RTM_NEWNETCONF, NETCONFA_ALL, |
7100 | ifindex, p); | |
95897312 | 7101 | return 0; |
1da177e4 | 7102 | |
f68635e6 | 7103 | free: |
607ea7cd | 7104 | kfree(table); |
f68635e6 | 7105 | out: |
95897312 | 7106 | return -ENOBUFS; |
1da177e4 LT |
7107 | } |
7108 | ||
23452170 DA |
7109 | static void __addrconf_sysctl_unregister(struct net *net, |
7110 | struct ipv6_devconf *p, int ifindex) | |
408c4768 | 7111 | { |
607ea7cd | 7112 | struct ctl_table *table; |
408c4768 | 7113 | |
607ea7cd | 7114 | if (!p->sysctl_header) |
408c4768 PE |
7115 | return; |
7116 | ||
607ea7cd KK |
7117 | table = p->sysctl_header->ctl_table_arg; |
7118 | unregister_net_sysctl_table(p->sysctl_header); | |
7119 | p->sysctl_header = NULL; | |
7120 | kfree(table); | |
23452170 DA |
7121 | |
7122 | inet6_netconf_notify_devconf(net, RTM_DELNETCONF, 0, ifindex, NULL); | |
408c4768 PE |
7123 | } |
7124 | ||
a317a2f1 | 7125 | static int addrconf_sysctl_register(struct inet6_dev *idev) |
f52295a9 | 7126 | { |
a317a2f1 WC |
7127 | int err; |
7128 | ||
7129 | if (!sysctl_dev_name_is_allowed(idev->dev->name)) | |
7130 | return -EINVAL; | |
7131 | ||
7132 | err = neigh_sysctl_register(idev->dev, idev->nd_parms, | |
7133 | &ndisc_ifinfo_sysctl_change); | |
7134 | if (err) | |
7135 | return err; | |
7136 | err = __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name, | |
7137 | idev, &idev->cnf); | |
7138 | if (err) | |
7139 | neigh_sysctl_unregister(idev->nd_parms); | |
7140 | ||
7141 | return err; | |
f52295a9 PE |
7142 | } |
7143 | ||
408c4768 | 7144 | static void addrconf_sysctl_unregister(struct inet6_dev *idev) |
1da177e4 | 7145 | { |
23452170 DA |
7146 | __addrconf_sysctl_unregister(dev_net(idev->dev), &idev->cnf, |
7147 | idev->dev->ifindex); | |
408c4768 | 7148 | neigh_sysctl_unregister(idev->nd_parms); |
1da177e4 LT |
7149 | } |
7150 | ||
7151 | ||
7152 | #endif | |
7153 | ||
2c8c1e72 | 7154 | static int __net_init addrconf_init_net(struct net *net) |
e0da5a48 | 7155 | { |
a79ca223 | 7156 | int err = -ENOMEM; |
e0da5a48 PE |
7157 | struct ipv6_devconf *all, *dflt; |
7158 | ||
21a216a8 | 7159 | spin_lock_init(&net->ipv6.addrconf_hash_lock); |
8805d13f | 7160 | INIT_DEFERRABLE_WORK(&net->ipv6.addr_chk_work, addrconf_verify_work); |
21a216a8 ED |
7161 | net->ipv6.inet6_addr_lst = kcalloc(IN6_ADDR_HSIZE, |
7162 | sizeof(struct hlist_head), | |
7163 | GFP_KERNEL); | |
7164 | if (!net->ipv6.inet6_addr_lst) | |
7165 | goto err_alloc_addr; | |
7166 | ||
a79ca223 | 7167 | all = kmemdup(&ipv6_devconf, sizeof(ipv6_devconf), GFP_KERNEL); |
63159f29 | 7168 | if (!all) |
a79ca223 | 7169 | goto err_alloc_all; |
e0da5a48 | 7170 | |
a79ca223 | 7171 | dflt = kmemdup(&ipv6_devconf_dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL); |
63159f29 | 7172 | if (!dflt) |
a79ca223 | 7173 | goto err_alloc_dflt; |
e0da5a48 | 7174 | |
a5612ca1 KI |
7175 | if (!net_eq(net, &init_net)) { |
7176 | switch (net_inherit_devconf()) { | |
9efd6a3c ND |
7177 | case 1: /* copy from init_net */ |
7178 | memcpy(all, init_net.ipv6.devconf_all, | |
7179 | sizeof(ipv6_devconf)); | |
7180 | memcpy(dflt, init_net.ipv6.devconf_dflt, | |
7181 | sizeof(ipv6_devconf_dflt)); | |
7182 | break; | |
7183 | case 3: /* copy from the current netns */ | |
7184 | memcpy(all, current->nsproxy->net_ns->ipv6.devconf_all, | |
7185 | sizeof(ipv6_devconf)); | |
7186 | memcpy(dflt, | |
7187 | current->nsproxy->net_ns->ipv6.devconf_dflt, | |
7188 | sizeof(ipv6_devconf_dflt)); | |
7189 | break; | |
7190 | case 0: | |
7191 | case 2: | |
7192 | /* use compiled values */ | |
7193 | break; | |
7194 | } | |
856c395c CW |
7195 | } |
7196 | ||
a79ca223 HZ |
7197 | /* these will be inherited by all namespaces */ |
7198 | dflt->autoconf = ipv6_defaults.autoconf; | |
7199 | dflt->disable_ipv6 = ipv6_defaults.disable_ipv6; | |
e0da5a48 | 7200 | |
3d1bec99 HFS |
7201 | dflt->stable_secret.initialized = false; |
7202 | all->stable_secret.initialized = false; | |
7203 | ||
e0da5a48 PE |
7204 | net->ipv6.devconf_all = all; |
7205 | net->ipv6.devconf_dflt = dflt; | |
7206 | ||
7207 | #ifdef CONFIG_SYSCTL | |
f8572d8f | 7208 | err = __addrconf_sysctl_register(net, "all", NULL, all); |
e0da5a48 PE |
7209 | if (err < 0) |
7210 | goto err_reg_all; | |
7211 | ||
f8572d8f | 7212 | err = __addrconf_sysctl_register(net, "default", NULL, dflt); |
e0da5a48 PE |
7213 | if (err < 0) |
7214 | goto err_reg_dflt; | |
7215 | #endif | |
7216 | return 0; | |
7217 | ||
7218 | #ifdef CONFIG_SYSCTL | |
7219 | err_reg_dflt: | |
23452170 | 7220 | __addrconf_sysctl_unregister(net, all, NETCONFA_IFINDEX_ALL); |
e0da5a48 PE |
7221 | err_reg_all: |
7222 | kfree(dflt); | |
1ca69520 | 7223 | net->ipv6.devconf_dflt = NULL; |
e0da5a48 PE |
7224 | #endif |
7225 | err_alloc_dflt: | |
7226 | kfree(all); | |
1ca69520 | 7227 | net->ipv6.devconf_all = NULL; |
e0da5a48 | 7228 | err_alloc_all: |
21a216a8 ED |
7229 | kfree(net->ipv6.inet6_addr_lst); |
7230 | err_alloc_addr: | |
e0da5a48 PE |
7231 | return err; |
7232 | } | |
7233 | ||
2c8c1e72 | 7234 | static void __net_exit addrconf_exit_net(struct net *net) |
e0da5a48 | 7235 | { |
21a216a8 ED |
7236 | int i; |
7237 | ||
e0da5a48 | 7238 | #ifdef CONFIG_SYSCTL |
23452170 DA |
7239 | __addrconf_sysctl_unregister(net, net->ipv6.devconf_dflt, |
7240 | NETCONFA_IFINDEX_DEFAULT); | |
7241 | __addrconf_sysctl_unregister(net, net->ipv6.devconf_all, | |
7242 | NETCONFA_IFINDEX_ALL); | |
e0da5a48 | 7243 | #endif |
73cf0e92 | 7244 | kfree(net->ipv6.devconf_dflt); |
7d9b1b57 | 7245 | net->ipv6.devconf_dflt = NULL; |
73cf0e92 | 7246 | kfree(net->ipv6.devconf_all); |
7d9b1b57 | 7247 | net->ipv6.devconf_all = NULL; |
21a216a8 | 7248 | |
be6b41c1 | 7249 | cancel_delayed_work_sync(&net->ipv6.addr_chk_work); |
21a216a8 ED |
7250 | /* |
7251 | * Check hash table, then free it. | |
7252 | */ | |
7253 | for (i = 0; i < IN6_ADDR_HSIZE; i++) | |
7254 | WARN_ON_ONCE(!hlist_empty(&net->ipv6.inet6_addr_lst[i])); | |
7255 | ||
7256 | kfree(net->ipv6.inet6_addr_lst); | |
7257 | net->ipv6.inet6_addr_lst = NULL; | |
e0da5a48 PE |
7258 | } |
7259 | ||
7260 | static struct pernet_operations addrconf_ops = { | |
7261 | .init = addrconf_init_net, | |
7262 | .exit = addrconf_exit_net, | |
7263 | }; | |
7264 | ||
207895fd | 7265 | static struct rtnl_af_ops inet6_ops __read_mostly = { |
b382b191 TG |
7266 | .family = AF_INET6, |
7267 | .fill_link_af = inet6_fill_link_af, | |
7268 | .get_link_af_size = inet6_get_link_af_size, | |
11b1f828 | 7269 | .validate_link_af = inet6_validate_link_af, |
f53adae4 | 7270 | .set_link_af = inet6_set_link_af, |
b382b191 TG |
7271 | }; |
7272 | ||
1da177e4 LT |
7273 | /* |
7274 | * Init / cleanup code | |
7275 | */ | |
7276 | ||
7277 | int __init addrconf_init(void) | |
7278 | { | |
a317a2f1 | 7279 | struct inet6_dev *idev; |
e66d1172 | 7280 | int err; |
2a8cc6c8 | 7281 | |
e21e8467 SH |
7282 | err = ipv6_addr_label_init(); |
7283 | if (err < 0) { | |
f3213831 JP |
7284 | pr_crit("%s: cannot initialize default policy table: %d\n", |
7285 | __func__, err); | |
2cc6d2bf | 7286 | goto out; |
2a8cc6c8 | 7287 | } |
1da177e4 | 7288 | |
2cc6d2bf NH |
7289 | err = register_pernet_subsys(&addrconf_ops); |
7290 | if (err < 0) | |
7291 | goto out_addrlabel; | |
e0da5a48 | 7292 | |
c15b1cca HFS |
7293 | addrconf_wq = create_workqueue("ipv6_addrconf"); |
7294 | if (!addrconf_wq) { | |
7295 | err = -ENOMEM; | |
7296 | goto out_nowq; | |
7297 | } | |
7298 | ||
1da177e4 | 7299 | rtnl_lock(); |
e5f80fcf | 7300 | idev = ipv6_add_dev(blackhole_netdev); |
1da177e4 | 7301 | rtnl_unlock(); |
a317a2f1 WC |
7302 | if (IS_ERR(idev)) { |
7303 | err = PTR_ERR(idev); | |
e0da5a48 | 7304 | goto errlo; |
a317a2f1 | 7305 | } |
1da177e4 | 7306 | |
2f460933 WC |
7307 | ip6_route_init_special_entries(); |
7308 | ||
1da177e4 LT |
7309 | register_netdevice_notifier(&ipv6_dev_notf); |
7310 | ||
8805d13f | 7311 | addrconf_verify(&init_net); |
c127ea2c | 7312 | |
3678a9d8 | 7313 | rtnl_af_register(&inet6_ops); |
b382b191 | 7314 | |
16feebcf FW |
7315 | err = rtnl_register_module(THIS_MODULE, PF_INET6, RTM_GETLINK, |
7316 | NULL, inet6_dump_ifinfo, 0); | |
c127ea2c TG |
7317 | if (err < 0) |
7318 | goto errout; | |
7319 | ||
16feebcf FW |
7320 | err = rtnl_register_module(THIS_MODULE, PF_INET6, RTM_NEWADDR, |
7321 | inet6_rtm_newaddr, NULL, 0); | |
7322 | if (err < 0) | |
7323 | goto errout; | |
7324 | err = rtnl_register_module(THIS_MODULE, PF_INET6, RTM_DELADDR, | |
7325 | inet6_rtm_deladdr, NULL, 0); | |
7326 | if (err < 0) | |
7327 | goto errout; | |
7328 | err = rtnl_register_module(THIS_MODULE, PF_INET6, RTM_GETADDR, | |
7329 | inet6_rtm_getaddr, inet6_dump_ifaddr, | |
7330 | RTNL_FLAG_DOIT_UNLOCKED); | |
7331 | if (err < 0) | |
7332 | goto errout; | |
7333 | err = rtnl_register_module(THIS_MODULE, PF_INET6, RTM_GETMULTICAST, | |
7334 | NULL, inet6_dump_ifmcaddr, 0); | |
7335 | if (err < 0) | |
7336 | goto errout; | |
7337 | err = rtnl_register_module(THIS_MODULE, PF_INET6, RTM_GETANYCAST, | |
7338 | NULL, inet6_dump_ifacaddr, 0); | |
7339 | if (err < 0) | |
7340 | goto errout; | |
7341 | err = rtnl_register_module(THIS_MODULE, PF_INET6, RTM_GETNETCONF, | |
7342 | inet6_netconf_get_devconf, | |
7343 | inet6_netconf_dump_devconf, | |
7344 | RTNL_FLAG_DOIT_UNLOCKED); | |
7345 | if (err < 0) | |
7346 | goto errout; | |
a3fde2ad FW |
7347 | err = ipv6_addr_label_rtnl_register(); |
7348 | if (err < 0) | |
7349 | goto errout; | |
2a8cc6c8 | 7350 | |
1da177e4 | 7351 | return 0; |
c127ea2c | 7352 | errout: |
16feebcf | 7353 | rtnl_unregister_all(PF_INET6); |
b382b191 | 7354 | rtnl_af_unregister(&inet6_ops); |
c127ea2c | 7355 | unregister_netdevice_notifier(&ipv6_dev_notf); |
e0da5a48 | 7356 | errlo: |
c15b1cca HFS |
7357 | destroy_workqueue(addrconf_wq); |
7358 | out_nowq: | |
e0da5a48 | 7359 | unregister_pernet_subsys(&addrconf_ops); |
2cc6d2bf NH |
7360 | out_addrlabel: |
7361 | ipv6_addr_label_cleanup(); | |
7362 | out: | |
c127ea2c | 7363 | return err; |
1da177e4 LT |
7364 | } |
7365 | ||
09f7709f | 7366 | void addrconf_cleanup(void) |
1da177e4 | 7367 | { |
176c39af | 7368 | struct net_device *dev; |
1da177e4 LT |
7369 | |
7370 | unregister_netdevice_notifier(&ipv6_dev_notf); | |
e0da5a48 | 7371 | unregister_pernet_subsys(&addrconf_ops); |
2cc6d2bf | 7372 | ipv6_addr_label_cleanup(); |
1da177e4 | 7373 | |
5c45121d | 7374 | rtnl_af_unregister(&inet6_ops); |
1da177e4 | 7375 | |
5c45121d | 7376 | rtnl_lock(); |
b382b191 | 7377 | |
176c39af DL |
7378 | /* clean dev list */ |
7379 | for_each_netdev(&init_net, dev) { | |
7380 | if (__in6_dev_get(dev) == NULL) | |
7381 | continue; | |
ae79dbf6 | 7382 | addrconf_ifdown(dev, true); |
176c39af | 7383 | } |
ae79dbf6 | 7384 | addrconf_ifdown(init_net.loopback_dev, true); |
176c39af | 7385 | |
1da177e4 | 7386 | rtnl_unlock(); |
c15b1cca HFS |
7387 | |
7388 | destroy_workqueue(addrconf_wq); | |
1da177e4 | 7389 | } |