Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * NET3 IP device support routines. | |
3 | * | |
1da177e4 LT |
4 | * This program is free software; you can redistribute it and/or |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version | |
7 | * 2 of the License, or (at your option) any later version. | |
8 | * | |
9 | * Derived from the IP parts of dev.c 1.0.19 | |
02c30a84 | 10 | * Authors: Ross Biro |
1da177e4 LT |
11 | * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
12 | * Mark Evans, <evansmp@uhura.aston.ac.uk> | |
13 | * | |
14 | * Additional Authors: | |
15 | * Alan Cox, <gw4pts@gw4pts.ampr.org> | |
16 | * Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> | |
17 | * | |
18 | * Changes: | |
19 | * Alexey Kuznetsov: pa_* fields are replaced with ifaddr | |
20 | * lists. | |
21 | * Cyrus Durgin: updated for kmod | |
22 | * Matthias Andree: in devinet_ioctl, compare label and | |
23 | * address (4.4BSD alias style support), | |
24 | * fall back to comparing just the label | |
25 | * if no match found. | |
26 | */ | |
27 | ||
1da177e4 LT |
28 | |
29 | #include <asm/uaccess.h> | |
1da177e4 | 30 | #include <linux/bitops.h> |
4fc268d2 | 31 | #include <linux/capability.h> |
1da177e4 LT |
32 | #include <linux/module.h> |
33 | #include <linux/types.h> | |
34 | #include <linux/kernel.h> | |
1da177e4 LT |
35 | #include <linux/string.h> |
36 | #include <linux/mm.h> | |
37 | #include <linux/socket.h> | |
38 | #include <linux/sockios.h> | |
39 | #include <linux/in.h> | |
40 | #include <linux/errno.h> | |
41 | #include <linux/interrupt.h> | |
1823730f | 42 | #include <linux/if_addr.h> |
1da177e4 LT |
43 | #include <linux/if_ether.h> |
44 | #include <linux/inet.h> | |
45 | #include <linux/netdevice.h> | |
46 | #include <linux/etherdevice.h> | |
47 | #include <linux/skbuff.h> | |
1da177e4 LT |
48 | #include <linux/init.h> |
49 | #include <linux/notifier.h> | |
50 | #include <linux/inetdevice.h> | |
51 | #include <linux/igmp.h> | |
5a0e3ad6 | 52 | #include <linux/slab.h> |
fd23c3b3 | 53 | #include <linux/hash.h> |
1da177e4 LT |
54 | #ifdef CONFIG_SYSCTL |
55 | #include <linux/sysctl.h> | |
56 | #endif | |
57 | #include <linux/kmod.h> | |
edc9e748 | 58 | #include <linux/netconf.h> |
1da177e4 | 59 | |
14c85021 | 60 | #include <net/arp.h> |
1da177e4 LT |
61 | #include <net/ip.h> |
62 | #include <net/route.h> | |
63 | #include <net/ip_fib.h> | |
63f3444f | 64 | #include <net/rtnetlink.h> |
752d14dc | 65 | #include <net/net_namespace.h> |
5c766d64 | 66 | #include <net/addrconf.h> |
1da177e4 | 67 | |
406b6f97 DM |
68 | #include "fib_lookup.h" |
69 | ||
0027ba84 | 70 | static struct ipv4_devconf ipv4_devconf = { |
42f811b8 | 71 | .data = { |
02291680 EB |
72 | [IPV4_DEVCONF_ACCEPT_REDIRECTS - 1] = 1, |
73 | [IPV4_DEVCONF_SEND_REDIRECTS - 1] = 1, | |
74 | [IPV4_DEVCONF_SECURE_REDIRECTS - 1] = 1, | |
75 | [IPV4_DEVCONF_SHARED_MEDIA - 1] = 1, | |
2690048c WM |
76 | [IPV4_DEVCONF_IGMPV2_UNSOLICITED_REPORT_INTERVAL - 1] = 10000 /*ms*/, |
77 | [IPV4_DEVCONF_IGMPV3_UNSOLICITED_REPORT_INTERVAL - 1] = 1000 /*ms*/, | |
42f811b8 | 78 | }, |
1da177e4 LT |
79 | }; |
80 | ||
81 | static struct ipv4_devconf ipv4_devconf_dflt = { | |
42f811b8 | 82 | .data = { |
02291680 EB |
83 | [IPV4_DEVCONF_ACCEPT_REDIRECTS - 1] = 1, |
84 | [IPV4_DEVCONF_SEND_REDIRECTS - 1] = 1, | |
85 | [IPV4_DEVCONF_SECURE_REDIRECTS - 1] = 1, | |
86 | [IPV4_DEVCONF_SHARED_MEDIA - 1] = 1, | |
87 | [IPV4_DEVCONF_ACCEPT_SOURCE_ROUTE - 1] = 1, | |
2690048c WM |
88 | [IPV4_DEVCONF_IGMPV2_UNSOLICITED_REPORT_INTERVAL - 1] = 10000 /*ms*/, |
89 | [IPV4_DEVCONF_IGMPV3_UNSOLICITED_REPORT_INTERVAL - 1] = 1000 /*ms*/, | |
42f811b8 | 90 | }, |
1da177e4 LT |
91 | }; |
92 | ||
9355bbd6 PE |
93 | #define IPV4_DEVCONF_DFLT(net, attr) \ |
94 | IPV4_DEVCONF((*net->ipv4.devconf_dflt), attr) | |
42f811b8 | 95 | |
ef7c79ed | 96 | static const struct nla_policy ifa_ipv4_policy[IFA_MAX+1] = { |
5c753978 TG |
97 | [IFA_LOCAL] = { .type = NLA_U32 }, |
98 | [IFA_ADDRESS] = { .type = NLA_U32 }, | |
99 | [IFA_BROADCAST] = { .type = NLA_U32 }, | |
5176f91e | 100 | [IFA_LABEL] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, |
5c766d64 | 101 | [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, |
ad6c8135 | 102 | [IFA_FLAGS] = { .type = NLA_U32 }, |
5c753978 TG |
103 | }; |
104 | ||
40384999 ED |
105 | #define IN4_ADDR_HSIZE_SHIFT 8 |
106 | #define IN4_ADDR_HSIZE (1U << IN4_ADDR_HSIZE_SHIFT) | |
107 | ||
fd23c3b3 | 108 | static struct hlist_head inet_addr_lst[IN4_ADDR_HSIZE]; |
fd23c3b3 | 109 | |
40384999 | 110 | static u32 inet_addr_hash(struct net *net, __be32 addr) |
fd23c3b3 | 111 | { |
40384999 | 112 | u32 val = (__force u32) addr ^ net_hash_mix(net); |
fd23c3b3 | 113 | |
40384999 | 114 | return hash_32(val, IN4_ADDR_HSIZE_SHIFT); |
fd23c3b3 DM |
115 | } |
116 | ||
117 | static void inet_hash_insert(struct net *net, struct in_ifaddr *ifa) | |
118 | { | |
40384999 | 119 | u32 hash = inet_addr_hash(net, ifa->ifa_local); |
fd23c3b3 | 120 | |
32a4be48 | 121 | ASSERT_RTNL(); |
fd23c3b3 | 122 | hlist_add_head_rcu(&ifa->hash, &inet_addr_lst[hash]); |
fd23c3b3 DM |
123 | } |
124 | ||
125 | static void inet_hash_remove(struct in_ifaddr *ifa) | |
126 | { | |
32a4be48 | 127 | ASSERT_RTNL(); |
fd23c3b3 | 128 | hlist_del_init_rcu(&ifa->hash); |
fd23c3b3 DM |
129 | } |
130 | ||
9435eb1c DM |
131 | /** |
132 | * __ip_dev_find - find the first device with a given source address. | |
133 | * @net: the net namespace | |
134 | * @addr: the source address | |
135 | * @devref: if true, take a reference on the found device | |
136 | * | |
137 | * If a caller uses devref=false, it should be protected by RCU, or RTNL | |
138 | */ | |
139 | struct net_device *__ip_dev_find(struct net *net, __be32 addr, bool devref) | |
140 | { | |
40384999 | 141 | u32 hash = inet_addr_hash(net, addr); |
9435eb1c DM |
142 | struct net_device *result = NULL; |
143 | struct in_ifaddr *ifa; | |
9435eb1c DM |
144 | |
145 | rcu_read_lock(); | |
b67bfe0d | 146 | hlist_for_each_entry_rcu(ifa, &inet_addr_lst[hash], hash) { |
e066008b | 147 | if (ifa->ifa_local == addr) { |
40384999 ED |
148 | struct net_device *dev = ifa->ifa_dev->dev; |
149 | ||
150 | if (!net_eq(dev_net(dev), net)) | |
151 | continue; | |
9435eb1c DM |
152 | result = dev; |
153 | break; | |
154 | } | |
155 | } | |
406b6f97 DM |
156 | if (!result) { |
157 | struct flowi4 fl4 = { .daddr = addr }; | |
158 | struct fib_result res = { 0 }; | |
159 | struct fib_table *local; | |
160 | ||
161 | /* Fallback to FIB local table so that communication | |
162 | * over loopback subnets work. | |
163 | */ | |
164 | local = fib_get_table(net, RT_TABLE_LOCAL); | |
165 | if (local && | |
166 | !fib_table_lookup(local, &fl4, &res, FIB_LOOKUP_NOREF) && | |
167 | res.type == RTN_LOCAL) | |
168 | result = FIB_RES_DEV(res); | |
169 | } | |
9435eb1c DM |
170 | if (result && devref) |
171 | dev_hold(result); | |
172 | rcu_read_unlock(); | |
173 | return result; | |
174 | } | |
175 | EXPORT_SYMBOL(__ip_dev_find); | |
176 | ||
d6062cbb | 177 | static void rtmsg_ifa(int event, struct in_ifaddr *, struct nlmsghdr *, u32); |
1da177e4 | 178 | |
e041c683 | 179 | static BLOCKING_NOTIFIER_HEAD(inetaddr_chain); |
1da177e4 LT |
180 | static void inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap, |
181 | int destroy); | |
182 | #ifdef CONFIG_SYSCTL | |
20e61da7 | 183 | static int devinet_sysctl_register(struct in_device *idev); |
51602b2a PE |
184 | static void devinet_sysctl_unregister(struct in_device *idev); |
185 | #else | |
20e61da7 | 186 | static int devinet_sysctl_register(struct in_device *idev) |
51602b2a | 187 | { |
20e61da7 | 188 | return 0; |
51602b2a | 189 | } |
40384999 | 190 | static void devinet_sysctl_unregister(struct in_device *idev) |
51602b2a PE |
191 | { |
192 | } | |
1da177e4 LT |
193 | #endif |
194 | ||
195 | /* Locks all the inet devices. */ | |
196 | ||
197 | static struct in_ifaddr *inet_alloc_ifa(void) | |
198 | { | |
93adcc80 | 199 | return kzalloc(sizeof(struct in_ifaddr), GFP_KERNEL); |
1da177e4 LT |
200 | } |
201 | ||
202 | static void inet_rcu_free_ifa(struct rcu_head *head) | |
203 | { | |
204 | struct in_ifaddr *ifa = container_of(head, struct in_ifaddr, rcu_head); | |
205 | if (ifa->ifa_dev) | |
206 | in_dev_put(ifa->ifa_dev); | |
207 | kfree(ifa); | |
208 | } | |
209 | ||
40384999 | 210 | static void inet_free_ifa(struct in_ifaddr *ifa) |
1da177e4 LT |
211 | { |
212 | call_rcu(&ifa->rcu_head, inet_rcu_free_ifa); | |
213 | } | |
214 | ||
215 | void in_dev_finish_destroy(struct in_device *idev) | |
216 | { | |
217 | struct net_device *dev = idev->dev; | |
218 | ||
547b792c IJ |
219 | WARN_ON(idev->ifa_list); |
220 | WARN_ON(idev->mc_list); | |
e9897071 | 221 | kfree(rcu_dereference_protected(idev->mc_hash, 1)); |
1da177e4 | 222 | #ifdef NET_REFCNT_DEBUG |
91df42be | 223 | pr_debug("%s: %p=%s\n", __func__, idev, dev ? dev->name : "NIL"); |
1da177e4 LT |
224 | #endif |
225 | dev_put(dev); | |
226 | if (!idev->dead) | |
9f9354b9 ED |
227 | pr_err("Freeing alive in_device %p\n", idev); |
228 | else | |
1da177e4 | 229 | kfree(idev); |
1da177e4 | 230 | } |
9f9354b9 | 231 | EXPORT_SYMBOL(in_dev_finish_destroy); |
1da177e4 | 232 | |
71e27da9 | 233 | static struct in_device *inetdev_init(struct net_device *dev) |
1da177e4 LT |
234 | { |
235 | struct in_device *in_dev; | |
20e61da7 | 236 | int err = -ENOMEM; |
1da177e4 LT |
237 | |
238 | ASSERT_RTNL(); | |
239 | ||
0da974f4 | 240 | in_dev = kzalloc(sizeof(*in_dev), GFP_KERNEL); |
1da177e4 LT |
241 | if (!in_dev) |
242 | goto out; | |
c346dca1 | 243 | memcpy(&in_dev->cnf, dev_net(dev)->ipv4.devconf_dflt, |
9355bbd6 | 244 | sizeof(in_dev->cnf)); |
1da177e4 LT |
245 | in_dev->cnf.sysctl = NULL; |
246 | in_dev->dev = dev; | |
9f9354b9 ED |
247 | in_dev->arp_parms = neigh_parms_alloc(dev, &arp_tbl); |
248 | if (!in_dev->arp_parms) | |
1da177e4 | 249 | goto out_kfree; |
0187bdfb BH |
250 | if (IPV4_DEVCONF(in_dev->cnf, FORWARDING)) |
251 | dev_disable_lro(dev); | |
1da177e4 LT |
252 | /* Reference in_dev->dev */ |
253 | dev_hold(dev); | |
30c4cf57 | 254 | /* Account for reference dev->ip_ptr (below) */ |
1da177e4 | 255 | in_dev_hold(in_dev); |
1da177e4 | 256 | |
20e61da7 WC |
257 | err = devinet_sysctl_register(in_dev); |
258 | if (err) { | |
259 | in_dev->dead = 1; | |
260 | in_dev_put(in_dev); | |
261 | in_dev = NULL; | |
262 | goto out; | |
263 | } | |
1da177e4 LT |
264 | ip_mc_init_dev(in_dev); |
265 | if (dev->flags & IFF_UP) | |
266 | ip_mc_up(in_dev); | |
483479ec | 267 | |
30c4cf57 | 268 | /* we can receive as soon as ip_ptr is set -- do this last */ |
cf778b00 | 269 | rcu_assign_pointer(dev->ip_ptr, in_dev); |
483479ec | 270 | out: |
20e61da7 | 271 | return in_dev ?: ERR_PTR(err); |
1da177e4 LT |
272 | out_kfree: |
273 | kfree(in_dev); | |
274 | in_dev = NULL; | |
275 | goto out; | |
276 | } | |
277 | ||
278 | static void in_dev_rcu_put(struct rcu_head *head) | |
279 | { | |
280 | struct in_device *idev = container_of(head, struct in_device, rcu_head); | |
281 | in_dev_put(idev); | |
282 | } | |
283 | ||
284 | static void inetdev_destroy(struct in_device *in_dev) | |
285 | { | |
286 | struct in_ifaddr *ifa; | |
287 | struct net_device *dev; | |
288 | ||
289 | ASSERT_RTNL(); | |
290 | ||
291 | dev = in_dev->dev; | |
1da177e4 LT |
292 | |
293 | in_dev->dead = 1; | |
294 | ||
295 | ip_mc_destroy_dev(in_dev); | |
296 | ||
297 | while ((ifa = in_dev->ifa_list) != NULL) { | |
298 | inet_del_ifa(in_dev, &in_dev->ifa_list, 0); | |
299 | inet_free_ifa(ifa); | |
300 | } | |
301 | ||
a9b3cd7f | 302 | RCU_INIT_POINTER(dev->ip_ptr, NULL); |
1da177e4 | 303 | |
51602b2a | 304 | devinet_sysctl_unregister(in_dev); |
1da177e4 LT |
305 | neigh_parms_release(&arp_tbl, in_dev->arp_parms); |
306 | arp_ifdown(dev); | |
307 | ||
308 | call_rcu(&in_dev->rcu_head, in_dev_rcu_put); | |
309 | } | |
310 | ||
ff428d72 | 311 | int inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b) |
1da177e4 LT |
312 | { |
313 | rcu_read_lock(); | |
314 | for_primary_ifa(in_dev) { | |
315 | if (inet_ifa_match(a, ifa)) { | |
316 | if (!b || inet_ifa_match(b, ifa)) { | |
317 | rcu_read_unlock(); | |
318 | return 1; | |
319 | } | |
320 | } | |
321 | } endfor_ifa(in_dev); | |
322 | rcu_read_unlock(); | |
323 | return 0; | |
324 | } | |
325 | ||
d6062cbb | 326 | static void __inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap, |
15e47304 | 327 | int destroy, struct nlmsghdr *nlh, u32 portid) |
1da177e4 | 328 | { |
8f937c60 | 329 | struct in_ifaddr *promote = NULL; |
0ff60a45 JHS |
330 | struct in_ifaddr *ifa, *ifa1 = *ifap; |
331 | struct in_ifaddr *last_prim = in_dev->ifa_list; | |
332 | struct in_ifaddr *prev_prom = NULL; | |
333 | int do_promote = IN_DEV_PROMOTE_SECONDARIES(in_dev); | |
1da177e4 LT |
334 | |
335 | ASSERT_RTNL(); | |
336 | ||
e905a9ed | 337 | /* 1. Deleting primary ifaddr forces deletion all secondaries |
8f937c60 HW |
338 | * unless alias promotion is set |
339 | **/ | |
1da177e4 LT |
340 | |
341 | if (!(ifa1->ifa_flags & IFA_F_SECONDARY)) { | |
1da177e4 LT |
342 | struct in_ifaddr **ifap1 = &ifa1->ifa_next; |
343 | ||
344 | while ((ifa = *ifap1) != NULL) { | |
e905a9ed | 345 | if (!(ifa->ifa_flags & IFA_F_SECONDARY) && |
0ff60a45 JHS |
346 | ifa1->ifa_scope <= ifa->ifa_scope) |
347 | last_prim = ifa; | |
348 | ||
1da177e4 LT |
349 | if (!(ifa->ifa_flags & IFA_F_SECONDARY) || |
350 | ifa1->ifa_mask != ifa->ifa_mask || | |
351 | !inet_ifa_match(ifa1->ifa_address, ifa)) { | |
352 | ifap1 = &ifa->ifa_next; | |
0ff60a45 | 353 | prev_prom = ifa; |
1da177e4 LT |
354 | continue; |
355 | } | |
356 | ||
0ff60a45 | 357 | if (!do_promote) { |
fd23c3b3 | 358 | inet_hash_remove(ifa); |
8f937c60 | 359 | *ifap1 = ifa->ifa_next; |
1da177e4 | 360 | |
15e47304 | 361 | rtmsg_ifa(RTM_DELADDR, ifa, nlh, portid); |
e041c683 AS |
362 | blocking_notifier_call_chain(&inetaddr_chain, |
363 | NETDEV_DOWN, ifa); | |
8f937c60 HW |
364 | inet_free_ifa(ifa); |
365 | } else { | |
366 | promote = ifa; | |
367 | break; | |
368 | } | |
1da177e4 LT |
369 | } |
370 | } | |
371 | ||
2d230e2b JA |
372 | /* On promotion all secondaries from subnet are changing |
373 | * the primary IP, we must remove all their routes silently | |
374 | * and later to add them back with new prefsrc. Do this | |
375 | * while all addresses are on the device list. | |
376 | */ | |
377 | for (ifa = promote; ifa; ifa = ifa->ifa_next) { | |
378 | if (ifa1->ifa_mask == ifa->ifa_mask && | |
379 | inet_ifa_match(ifa1->ifa_address, ifa)) | |
380 | fib_del_ifaddr(ifa, ifa1); | |
381 | } | |
382 | ||
1da177e4 LT |
383 | /* 2. Unlink it */ |
384 | ||
385 | *ifap = ifa1->ifa_next; | |
fd23c3b3 | 386 | inet_hash_remove(ifa1); |
1da177e4 LT |
387 | |
388 | /* 3. Announce address deletion */ | |
389 | ||
390 | /* Send message first, then call notifier. | |
391 | At first sight, FIB update triggered by notifier | |
392 | will refer to already deleted ifaddr, that could confuse | |
393 | netlink listeners. It is not true: look, gated sees | |
394 | that route deleted and if it still thinks that ifaddr | |
395 | is valid, it will try to restore deleted routes... Grr. | |
396 | So that, this order is correct. | |
397 | */ | |
15e47304 | 398 | rtmsg_ifa(RTM_DELADDR, ifa1, nlh, portid); |
e041c683 | 399 | blocking_notifier_call_chain(&inetaddr_chain, NETDEV_DOWN, ifa1); |
1da177e4 | 400 | |
0ff60a45 | 401 | if (promote) { |
04024b93 | 402 | struct in_ifaddr *next_sec = promote->ifa_next; |
0ff60a45 JHS |
403 | |
404 | if (prev_prom) { | |
405 | prev_prom->ifa_next = promote->ifa_next; | |
406 | promote->ifa_next = last_prim->ifa_next; | |
407 | last_prim->ifa_next = promote; | |
408 | } | |
8f937c60 | 409 | |
8f937c60 | 410 | promote->ifa_flags &= ~IFA_F_SECONDARY; |
15e47304 | 411 | rtmsg_ifa(RTM_NEWADDR, promote, nlh, portid); |
e041c683 AS |
412 | blocking_notifier_call_chain(&inetaddr_chain, |
413 | NETDEV_UP, promote); | |
04024b93 | 414 | for (ifa = next_sec; ifa; ifa = ifa->ifa_next) { |
0ff60a45 JHS |
415 | if (ifa1->ifa_mask != ifa->ifa_mask || |
416 | !inet_ifa_match(ifa1->ifa_address, ifa)) | |
417 | continue; | |
418 | fib_add_ifaddr(ifa); | |
419 | } | |
420 | ||
421 | } | |
6363097c | 422 | if (destroy) |
0ff60a45 | 423 | inet_free_ifa(ifa1); |
1da177e4 LT |
424 | } |
425 | ||
d6062cbb TG |
426 | static void inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap, |
427 | int destroy) | |
428 | { | |
429 | __inet_del_ifa(in_dev, ifap, destroy, NULL, 0); | |
430 | } | |
431 | ||
5c766d64 JP |
432 | static void check_lifetime(struct work_struct *work); |
433 | ||
434 | static DECLARE_DELAYED_WORK(check_lifetime_work, check_lifetime); | |
435 | ||
d6062cbb | 436 | static int __inet_insert_ifa(struct in_ifaddr *ifa, struct nlmsghdr *nlh, |
15e47304 | 437 | u32 portid) |
1da177e4 LT |
438 | { |
439 | struct in_device *in_dev = ifa->ifa_dev; | |
440 | struct in_ifaddr *ifa1, **ifap, **last_primary; | |
441 | ||
442 | ASSERT_RTNL(); | |
443 | ||
444 | if (!ifa->ifa_local) { | |
445 | inet_free_ifa(ifa); | |
446 | return 0; | |
447 | } | |
448 | ||
449 | ifa->ifa_flags &= ~IFA_F_SECONDARY; | |
450 | last_primary = &in_dev->ifa_list; | |
451 | ||
452 | for (ifap = &in_dev->ifa_list; (ifa1 = *ifap) != NULL; | |
453 | ifap = &ifa1->ifa_next) { | |
454 | if (!(ifa1->ifa_flags & IFA_F_SECONDARY) && | |
455 | ifa->ifa_scope <= ifa1->ifa_scope) | |
456 | last_primary = &ifa1->ifa_next; | |
457 | if (ifa1->ifa_mask == ifa->ifa_mask && | |
458 | inet_ifa_match(ifa1->ifa_address, ifa)) { | |
459 | if (ifa1->ifa_local == ifa->ifa_local) { | |
460 | inet_free_ifa(ifa); | |
461 | return -EEXIST; | |
462 | } | |
463 | if (ifa1->ifa_scope != ifa->ifa_scope) { | |
464 | inet_free_ifa(ifa); | |
465 | return -EINVAL; | |
466 | } | |
467 | ifa->ifa_flags |= IFA_F_SECONDARY; | |
468 | } | |
469 | } | |
470 | ||
471 | if (!(ifa->ifa_flags & IFA_F_SECONDARY)) { | |
63862b5b | 472 | prandom_seed((__force u32) ifa->ifa_local); |
1da177e4 LT |
473 | ifap = last_primary; |
474 | } | |
475 | ||
476 | ifa->ifa_next = *ifap; | |
477 | *ifap = ifa; | |
478 | ||
fd23c3b3 DM |
479 | inet_hash_insert(dev_net(in_dev->dev), ifa); |
480 | ||
5c766d64 | 481 | cancel_delayed_work(&check_lifetime_work); |
906e073f | 482 | queue_delayed_work(system_power_efficient_wq, &check_lifetime_work, 0); |
5c766d64 | 483 | |
1da177e4 LT |
484 | /* Send message first, then call notifier. |
485 | Notifier will trigger FIB update, so that | |
486 | listeners of netlink will know about new ifaddr */ | |
15e47304 | 487 | rtmsg_ifa(RTM_NEWADDR, ifa, nlh, portid); |
e041c683 | 488 | blocking_notifier_call_chain(&inetaddr_chain, NETDEV_UP, ifa); |
1da177e4 LT |
489 | |
490 | return 0; | |
491 | } | |
492 | ||
d6062cbb TG |
493 | static int inet_insert_ifa(struct in_ifaddr *ifa) |
494 | { | |
495 | return __inet_insert_ifa(ifa, NULL, 0); | |
496 | } | |
497 | ||
1da177e4 LT |
498 | static int inet_set_ifa(struct net_device *dev, struct in_ifaddr *ifa) |
499 | { | |
e5ed6399 | 500 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
1da177e4 LT |
501 | |
502 | ASSERT_RTNL(); | |
503 | ||
504 | if (!in_dev) { | |
71e27da9 HX |
505 | inet_free_ifa(ifa); |
506 | return -ENOBUFS; | |
1da177e4 | 507 | } |
71e27da9 | 508 | ipv4_devconf_setall(in_dev); |
1d4c8c29 | 509 | neigh_parms_data_state_setall(in_dev->arp_parms); |
1da177e4 | 510 | if (ifa->ifa_dev != in_dev) { |
547b792c | 511 | WARN_ON(ifa->ifa_dev); |
1da177e4 LT |
512 | in_dev_hold(in_dev); |
513 | ifa->ifa_dev = in_dev; | |
514 | } | |
f97c1e0c | 515 | if (ipv4_is_loopback(ifa->ifa_local)) |
1da177e4 LT |
516 | ifa->ifa_scope = RT_SCOPE_HOST; |
517 | return inet_insert_ifa(ifa); | |
518 | } | |
519 | ||
8723e1b4 ED |
520 | /* Caller must hold RCU or RTNL : |
521 | * We dont take a reference on found in_device | |
522 | */ | |
7fee0ca2 | 523 | struct in_device *inetdev_by_index(struct net *net, int ifindex) |
1da177e4 LT |
524 | { |
525 | struct net_device *dev; | |
526 | struct in_device *in_dev = NULL; | |
c148fc2e ED |
527 | |
528 | rcu_read_lock(); | |
529 | dev = dev_get_by_index_rcu(net, ifindex); | |
1da177e4 | 530 | if (dev) |
8723e1b4 | 531 | in_dev = rcu_dereference_rtnl(dev->ip_ptr); |
c148fc2e | 532 | rcu_read_unlock(); |
1da177e4 LT |
533 | return in_dev; |
534 | } | |
9f9354b9 | 535 | EXPORT_SYMBOL(inetdev_by_index); |
1da177e4 LT |
536 | |
537 | /* Called only from RTNL semaphored context. No locks. */ | |
538 | ||
60cad5da AV |
539 | struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix, |
540 | __be32 mask) | |
1da177e4 LT |
541 | { |
542 | ASSERT_RTNL(); | |
543 | ||
544 | for_primary_ifa(in_dev) { | |
545 | if (ifa->ifa_mask == mask && inet_ifa_match(prefix, ifa)) | |
546 | return ifa; | |
547 | } endfor_ifa(in_dev); | |
548 | return NULL; | |
549 | } | |
550 | ||
661d2967 | 551 | static int inet_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 552 | { |
3b1e0a65 | 553 | struct net *net = sock_net(skb->sk); |
dfdd5fd4 | 554 | struct nlattr *tb[IFA_MAX+1]; |
1da177e4 | 555 | struct in_device *in_dev; |
dfdd5fd4 | 556 | struct ifaddrmsg *ifm; |
1da177e4 | 557 | struct in_ifaddr *ifa, **ifap; |
dfdd5fd4 | 558 | int err = -EINVAL; |
1da177e4 LT |
559 | |
560 | ASSERT_RTNL(); | |
561 | ||
dfdd5fd4 TG |
562 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv4_policy); |
563 | if (err < 0) | |
564 | goto errout; | |
565 | ||
566 | ifm = nlmsg_data(nlh); | |
7fee0ca2 | 567 | in_dev = inetdev_by_index(net, ifm->ifa_index); |
dfdd5fd4 TG |
568 | if (in_dev == NULL) { |
569 | err = -ENODEV; | |
570 | goto errout; | |
571 | } | |
572 | ||
1da177e4 LT |
573 | for (ifap = &in_dev->ifa_list; (ifa = *ifap) != NULL; |
574 | ifap = &ifa->ifa_next) { | |
dfdd5fd4 | 575 | if (tb[IFA_LOCAL] && |
a7a628c4 | 576 | ifa->ifa_local != nla_get_be32(tb[IFA_LOCAL])) |
dfdd5fd4 TG |
577 | continue; |
578 | ||
579 | if (tb[IFA_LABEL] && nla_strcmp(tb[IFA_LABEL], ifa->ifa_label)) | |
1da177e4 | 580 | continue; |
dfdd5fd4 TG |
581 | |
582 | if (tb[IFA_ADDRESS] && | |
583 | (ifm->ifa_prefixlen != ifa->ifa_prefixlen || | |
a7a628c4 | 584 | !inet_ifa_match(nla_get_be32(tb[IFA_ADDRESS]), ifa))) |
dfdd5fd4 TG |
585 | continue; |
586 | ||
15e47304 | 587 | __inet_del_ifa(in_dev, ifap, 1, nlh, NETLINK_CB(skb).portid); |
1da177e4 LT |
588 | return 0; |
589 | } | |
dfdd5fd4 TG |
590 | |
591 | err = -EADDRNOTAVAIL; | |
592 | errout: | |
593 | return err; | |
1da177e4 LT |
594 | } |
595 | ||
5c766d64 JP |
596 | #define INFINITY_LIFE_TIME 0xFFFFFFFF |
597 | ||
598 | static void check_lifetime(struct work_struct *work) | |
599 | { | |
600 | unsigned long now, next, next_sec, next_sched; | |
601 | struct in_ifaddr *ifa; | |
c988d1e8 | 602 | struct hlist_node *n; |
5c766d64 JP |
603 | int i; |
604 | ||
605 | now = jiffies; | |
606 | next = round_jiffies_up(now + ADDR_CHECK_FREQUENCY); | |
607 | ||
5c766d64 | 608 | for (i = 0; i < IN4_ADDR_HSIZE; i++) { |
c988d1e8 JP |
609 | bool change_needed = false; |
610 | ||
611 | rcu_read_lock(); | |
b67bfe0d | 612 | hlist_for_each_entry_rcu(ifa, &inet_addr_lst[i], hash) { |
5c766d64 JP |
613 | unsigned long age; |
614 | ||
615 | if (ifa->ifa_flags & IFA_F_PERMANENT) | |
616 | continue; | |
617 | ||
618 | /* We try to batch several events at once. */ | |
619 | age = (now - ifa->ifa_tstamp + | |
620 | ADDRCONF_TIMER_FUZZ_MINUS) / HZ; | |
621 | ||
622 | if (ifa->ifa_valid_lft != INFINITY_LIFE_TIME && | |
623 | age >= ifa->ifa_valid_lft) { | |
c988d1e8 | 624 | change_needed = true; |
5c766d64 JP |
625 | } else if (ifa->ifa_preferred_lft == |
626 | INFINITY_LIFE_TIME) { | |
627 | continue; | |
628 | } else if (age >= ifa->ifa_preferred_lft) { | |
629 | if (time_before(ifa->ifa_tstamp + | |
630 | ifa->ifa_valid_lft * HZ, next)) | |
631 | next = ifa->ifa_tstamp + | |
632 | ifa->ifa_valid_lft * HZ; | |
633 | ||
c988d1e8 JP |
634 | if (!(ifa->ifa_flags & IFA_F_DEPRECATED)) |
635 | change_needed = true; | |
5c766d64 JP |
636 | } else if (time_before(ifa->ifa_tstamp + |
637 | ifa->ifa_preferred_lft * HZ, | |
638 | next)) { | |
639 | next = ifa->ifa_tstamp + | |
640 | ifa->ifa_preferred_lft * HZ; | |
641 | } | |
642 | } | |
c988d1e8 JP |
643 | rcu_read_unlock(); |
644 | if (!change_needed) | |
645 | continue; | |
646 | rtnl_lock(); | |
647 | hlist_for_each_entry_safe(ifa, n, &inet_addr_lst[i], hash) { | |
648 | unsigned long age; | |
649 | ||
650 | if (ifa->ifa_flags & IFA_F_PERMANENT) | |
651 | continue; | |
652 | ||
653 | /* We try to batch several events at once. */ | |
654 | age = (now - ifa->ifa_tstamp + | |
655 | ADDRCONF_TIMER_FUZZ_MINUS) / HZ; | |
656 | ||
657 | if (ifa->ifa_valid_lft != INFINITY_LIFE_TIME && | |
658 | age >= ifa->ifa_valid_lft) { | |
659 | struct in_ifaddr **ifap; | |
660 | ||
661 | for (ifap = &ifa->ifa_dev->ifa_list; | |
662 | *ifap != NULL; ifap = &(*ifap)->ifa_next) { | |
663 | if (*ifap == ifa) { | |
664 | inet_del_ifa(ifa->ifa_dev, | |
665 | ifap, 1); | |
666 | break; | |
667 | } | |
668 | } | |
669 | } else if (ifa->ifa_preferred_lft != | |
670 | INFINITY_LIFE_TIME && | |
671 | age >= ifa->ifa_preferred_lft && | |
672 | !(ifa->ifa_flags & IFA_F_DEPRECATED)) { | |
673 | ifa->ifa_flags |= IFA_F_DEPRECATED; | |
674 | rtmsg_ifa(RTM_NEWADDR, ifa, NULL, 0); | |
675 | } | |
676 | } | |
677 | rtnl_unlock(); | |
5c766d64 | 678 | } |
5c766d64 JP |
679 | |
680 | next_sec = round_jiffies_up(next); | |
681 | next_sched = next; | |
682 | ||
683 | /* If rounded timeout is accurate enough, accept it. */ | |
684 | if (time_before(next_sec, next + ADDRCONF_TIMER_FUZZ)) | |
685 | next_sched = next_sec; | |
686 | ||
687 | now = jiffies; | |
688 | /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */ | |
689 | if (time_before(next_sched, now + ADDRCONF_TIMER_FUZZ_MAX)) | |
690 | next_sched = now + ADDRCONF_TIMER_FUZZ_MAX; | |
691 | ||
906e073f | 692 | queue_delayed_work(system_power_efficient_wq, &check_lifetime_work, |
693 | next_sched - now); | |
5c766d64 JP |
694 | } |
695 | ||
696 | static void set_ifa_lifetime(struct in_ifaddr *ifa, __u32 valid_lft, | |
697 | __u32 prefered_lft) | |
698 | { | |
699 | unsigned long timeout; | |
700 | ||
701 | ifa->ifa_flags &= ~(IFA_F_PERMANENT | IFA_F_DEPRECATED); | |
702 | ||
703 | timeout = addrconf_timeout_fixup(valid_lft, HZ); | |
704 | if (addrconf_finite_timeout(timeout)) | |
705 | ifa->ifa_valid_lft = timeout; | |
706 | else | |
707 | ifa->ifa_flags |= IFA_F_PERMANENT; | |
708 | ||
709 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); | |
710 | if (addrconf_finite_timeout(timeout)) { | |
711 | if (timeout == 0) | |
712 | ifa->ifa_flags |= IFA_F_DEPRECATED; | |
713 | ifa->ifa_preferred_lft = timeout; | |
714 | } | |
715 | ifa->ifa_tstamp = jiffies; | |
716 | if (!ifa->ifa_cstamp) | |
717 | ifa->ifa_cstamp = ifa->ifa_tstamp; | |
718 | } | |
719 | ||
720 | static struct in_ifaddr *rtm_to_ifaddr(struct net *net, struct nlmsghdr *nlh, | |
721 | __u32 *pvalid_lft, __u32 *pprefered_lft) | |
1da177e4 | 722 | { |
5c753978 TG |
723 | struct nlattr *tb[IFA_MAX+1]; |
724 | struct in_ifaddr *ifa; | |
725 | struct ifaddrmsg *ifm; | |
1da177e4 LT |
726 | struct net_device *dev; |
727 | struct in_device *in_dev; | |
7b218574 | 728 | int err; |
1da177e4 | 729 | |
5c753978 TG |
730 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv4_policy); |
731 | if (err < 0) | |
732 | goto errout; | |
1da177e4 | 733 | |
5c753978 | 734 | ifm = nlmsg_data(nlh); |
7b218574 DL |
735 | err = -EINVAL; |
736 | if (ifm->ifa_prefixlen > 32 || tb[IFA_LOCAL] == NULL) | |
5c753978 | 737 | goto errout; |
1da177e4 | 738 | |
4b8aa9ab | 739 | dev = __dev_get_by_index(net, ifm->ifa_index); |
7b218574 DL |
740 | err = -ENODEV; |
741 | if (dev == NULL) | |
5c753978 | 742 | goto errout; |
1da177e4 | 743 | |
5c753978 | 744 | in_dev = __in_dev_get_rtnl(dev); |
7b218574 DL |
745 | err = -ENOBUFS; |
746 | if (in_dev == NULL) | |
71e27da9 | 747 | goto errout; |
1da177e4 | 748 | |
5c753978 | 749 | ifa = inet_alloc_ifa(); |
7b218574 | 750 | if (ifa == NULL) |
5c753978 TG |
751 | /* |
752 | * A potential indev allocation can be left alive, it stays | |
753 | * assigned to its device and is destroy with it. | |
754 | */ | |
5c753978 | 755 | goto errout; |
5c753978 | 756 | |
a4e65d36 | 757 | ipv4_devconf_setall(in_dev); |
1d4c8c29 | 758 | neigh_parms_data_state_setall(in_dev->arp_parms); |
5c753978 TG |
759 | in_dev_hold(in_dev); |
760 | ||
761 | if (tb[IFA_ADDRESS] == NULL) | |
762 | tb[IFA_ADDRESS] = tb[IFA_LOCAL]; | |
1da177e4 | 763 | |
fd23c3b3 | 764 | INIT_HLIST_NODE(&ifa->hash); |
1da177e4 LT |
765 | ifa->ifa_prefixlen = ifm->ifa_prefixlen; |
766 | ifa->ifa_mask = inet_make_mask(ifm->ifa_prefixlen); | |
ad6c8135 JP |
767 | ifa->ifa_flags = tb[IFA_FLAGS] ? nla_get_u32(tb[IFA_FLAGS]) : |
768 | ifm->ifa_flags; | |
1da177e4 | 769 | ifa->ifa_scope = ifm->ifa_scope; |
5c753978 TG |
770 | ifa->ifa_dev = in_dev; |
771 | ||
a7a628c4 AV |
772 | ifa->ifa_local = nla_get_be32(tb[IFA_LOCAL]); |
773 | ifa->ifa_address = nla_get_be32(tb[IFA_ADDRESS]); | |
5c753978 TG |
774 | |
775 | if (tb[IFA_BROADCAST]) | |
a7a628c4 | 776 | ifa->ifa_broadcast = nla_get_be32(tb[IFA_BROADCAST]); |
5c753978 | 777 | |
5c753978 TG |
778 | if (tb[IFA_LABEL]) |
779 | nla_strlcpy(ifa->ifa_label, tb[IFA_LABEL], IFNAMSIZ); | |
1da177e4 LT |
780 | else |
781 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); | |
782 | ||
5c766d64 JP |
783 | if (tb[IFA_CACHEINFO]) { |
784 | struct ifa_cacheinfo *ci; | |
785 | ||
786 | ci = nla_data(tb[IFA_CACHEINFO]); | |
787 | if (!ci->ifa_valid || ci->ifa_prefered > ci->ifa_valid) { | |
788 | err = -EINVAL; | |
446266b0 | 789 | goto errout_free; |
5c766d64 JP |
790 | } |
791 | *pvalid_lft = ci->ifa_valid; | |
792 | *pprefered_lft = ci->ifa_prefered; | |
793 | } | |
794 | ||
5c753978 TG |
795 | return ifa; |
796 | ||
446266b0 DB |
797 | errout_free: |
798 | inet_free_ifa(ifa); | |
5c753978 TG |
799 | errout: |
800 | return ERR_PTR(err); | |
801 | } | |
802 | ||
5c766d64 JP |
803 | static struct in_ifaddr *find_matching_ifa(struct in_ifaddr *ifa) |
804 | { | |
805 | struct in_device *in_dev = ifa->ifa_dev; | |
806 | struct in_ifaddr *ifa1, **ifap; | |
807 | ||
808 | if (!ifa->ifa_local) | |
809 | return NULL; | |
810 | ||
811 | for (ifap = &in_dev->ifa_list; (ifa1 = *ifap) != NULL; | |
812 | ifap = &ifa1->ifa_next) { | |
813 | if (ifa1->ifa_mask == ifa->ifa_mask && | |
814 | inet_ifa_match(ifa1->ifa_address, ifa) && | |
815 | ifa1->ifa_local == ifa->ifa_local) | |
816 | return ifa1; | |
817 | } | |
818 | return NULL; | |
819 | } | |
820 | ||
661d2967 | 821 | static int inet_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh) |
5c753978 | 822 | { |
3b1e0a65 | 823 | struct net *net = sock_net(skb->sk); |
5c753978 | 824 | struct in_ifaddr *ifa; |
5c766d64 JP |
825 | struct in_ifaddr *ifa_existing; |
826 | __u32 valid_lft = INFINITY_LIFE_TIME; | |
827 | __u32 prefered_lft = INFINITY_LIFE_TIME; | |
5c753978 TG |
828 | |
829 | ASSERT_RTNL(); | |
830 | ||
5c766d64 | 831 | ifa = rtm_to_ifaddr(net, nlh, &valid_lft, &prefered_lft); |
5c753978 TG |
832 | if (IS_ERR(ifa)) |
833 | return PTR_ERR(ifa); | |
834 | ||
5c766d64 JP |
835 | ifa_existing = find_matching_ifa(ifa); |
836 | if (!ifa_existing) { | |
837 | /* It would be best to check for !NLM_F_CREATE here but | |
614d056c | 838 | * userspace already relies on not having to provide this. |
5c766d64 JP |
839 | */ |
840 | set_ifa_lifetime(ifa, valid_lft, prefered_lft); | |
841 | return __inet_insert_ifa(ifa, nlh, NETLINK_CB(skb).portid); | |
842 | } else { | |
843 | inet_free_ifa(ifa); | |
844 | ||
845 | if (nlh->nlmsg_flags & NLM_F_EXCL || | |
846 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) | |
847 | return -EEXIST; | |
34e2ed34 JP |
848 | ifa = ifa_existing; |
849 | set_ifa_lifetime(ifa, valid_lft, prefered_lft); | |
05a324b9 | 850 | cancel_delayed_work(&check_lifetime_work); |
906e073f | 851 | queue_delayed_work(system_power_efficient_wq, |
852 | &check_lifetime_work, 0); | |
34e2ed34 JP |
853 | rtmsg_ifa(RTM_NEWADDR, ifa, nlh, NETLINK_CB(skb).portid); |
854 | blocking_notifier_call_chain(&inetaddr_chain, NETDEV_UP, ifa); | |
5c766d64 JP |
855 | } |
856 | return 0; | |
1da177e4 LT |
857 | } |
858 | ||
859 | /* | |
860 | * Determine a default network mask, based on the IP address. | |
861 | */ | |
862 | ||
40384999 | 863 | static int inet_abc_len(__be32 addr) |
1da177e4 LT |
864 | { |
865 | int rc = -1; /* Something else, probably a multicast. */ | |
866 | ||
f97c1e0c | 867 | if (ipv4_is_zeronet(addr)) |
e905a9ed | 868 | rc = 0; |
1da177e4 | 869 | else { |
714e85be | 870 | __u32 haddr = ntohl(addr); |
1da177e4 | 871 | |
714e85be | 872 | if (IN_CLASSA(haddr)) |
1da177e4 | 873 | rc = 8; |
714e85be | 874 | else if (IN_CLASSB(haddr)) |
1da177e4 | 875 | rc = 16; |
714e85be | 876 | else if (IN_CLASSC(haddr)) |
1da177e4 LT |
877 | rc = 24; |
878 | } | |
879 | ||
e905a9ed | 880 | return rc; |
1da177e4 LT |
881 | } |
882 | ||
883 | ||
e5b13cb1 | 884 | int devinet_ioctl(struct net *net, unsigned int cmd, void __user *arg) |
1da177e4 LT |
885 | { |
886 | struct ifreq ifr; | |
887 | struct sockaddr_in sin_orig; | |
888 | struct sockaddr_in *sin = (struct sockaddr_in *)&ifr.ifr_addr; | |
889 | struct in_device *in_dev; | |
890 | struct in_ifaddr **ifap = NULL; | |
891 | struct in_ifaddr *ifa = NULL; | |
892 | struct net_device *dev; | |
893 | char *colon; | |
894 | int ret = -EFAULT; | |
895 | int tryaddrmatch = 0; | |
896 | ||
897 | /* | |
898 | * Fetch the caller's info block into kernel space | |
899 | */ | |
900 | ||
901 | if (copy_from_user(&ifr, arg, sizeof(struct ifreq))) | |
902 | goto out; | |
903 | ifr.ifr_name[IFNAMSIZ - 1] = 0; | |
904 | ||
905 | /* save original address for comparison */ | |
906 | memcpy(&sin_orig, sin, sizeof(*sin)); | |
907 | ||
908 | colon = strchr(ifr.ifr_name, ':'); | |
909 | if (colon) | |
910 | *colon = 0; | |
911 | ||
e5b13cb1 | 912 | dev_load(net, ifr.ifr_name); |
1da177e4 | 913 | |
132adf54 | 914 | switch (cmd) { |
1da177e4 LT |
915 | case SIOCGIFADDR: /* Get interface address */ |
916 | case SIOCGIFBRDADDR: /* Get the broadcast address */ | |
917 | case SIOCGIFDSTADDR: /* Get the destination address */ | |
918 | case SIOCGIFNETMASK: /* Get the netmask for the interface */ | |
919 | /* Note that these ioctls will not sleep, | |
920 | so that we do not impose a lock. | |
921 | One day we will be forced to put shlock here (I mean SMP) | |
922 | */ | |
923 | tryaddrmatch = (sin_orig.sin_family == AF_INET); | |
924 | memset(sin, 0, sizeof(*sin)); | |
925 | sin->sin_family = AF_INET; | |
926 | break; | |
927 | ||
928 | case SIOCSIFFLAGS: | |
bf5b30b8 | 929 | ret = -EPERM; |
52e804c6 | 930 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 LT |
931 | goto out; |
932 | break; | |
933 | case SIOCSIFADDR: /* Set interface address (and family) */ | |
934 | case SIOCSIFBRDADDR: /* Set the broadcast address */ | |
935 | case SIOCSIFDSTADDR: /* Set the destination address */ | |
936 | case SIOCSIFNETMASK: /* Set the netmask for the interface */ | |
bf5b30b8 | 937 | ret = -EPERM; |
52e804c6 | 938 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 LT |
939 | goto out; |
940 | ret = -EINVAL; | |
941 | if (sin->sin_family != AF_INET) | |
942 | goto out; | |
943 | break; | |
944 | default: | |
945 | ret = -EINVAL; | |
946 | goto out; | |
947 | } | |
948 | ||
949 | rtnl_lock(); | |
950 | ||
951 | ret = -ENODEV; | |
9f9354b9 ED |
952 | dev = __dev_get_by_name(net, ifr.ifr_name); |
953 | if (!dev) | |
1da177e4 LT |
954 | goto done; |
955 | ||
956 | if (colon) | |
957 | *colon = ':'; | |
958 | ||
9f9354b9 ED |
959 | in_dev = __in_dev_get_rtnl(dev); |
960 | if (in_dev) { | |
1da177e4 LT |
961 | if (tryaddrmatch) { |
962 | /* Matthias Andree */ | |
963 | /* compare label and address (4.4BSD style) */ | |
964 | /* note: we only do this for a limited set of ioctls | |
965 | and only if the original address family was AF_INET. | |
966 | This is checked above. */ | |
967 | for (ifap = &in_dev->ifa_list; (ifa = *ifap) != NULL; | |
968 | ifap = &ifa->ifa_next) { | |
969 | if (!strcmp(ifr.ifr_name, ifa->ifa_label) && | |
970 | sin_orig.sin_addr.s_addr == | |
6c91afe1 | 971 | ifa->ifa_local) { |
1da177e4 LT |
972 | break; /* found */ |
973 | } | |
974 | } | |
975 | } | |
976 | /* we didn't get a match, maybe the application is | |
977 | 4.3BSD-style and passed in junk so we fall back to | |
978 | comparing just the label */ | |
979 | if (!ifa) { | |
980 | for (ifap = &in_dev->ifa_list; (ifa = *ifap) != NULL; | |
981 | ifap = &ifa->ifa_next) | |
982 | if (!strcmp(ifr.ifr_name, ifa->ifa_label)) | |
983 | break; | |
984 | } | |
985 | } | |
986 | ||
987 | ret = -EADDRNOTAVAIL; | |
988 | if (!ifa && cmd != SIOCSIFADDR && cmd != SIOCSIFFLAGS) | |
989 | goto done; | |
990 | ||
132adf54 | 991 | switch (cmd) { |
1da177e4 LT |
992 | case SIOCGIFADDR: /* Get interface address */ |
993 | sin->sin_addr.s_addr = ifa->ifa_local; | |
994 | goto rarok; | |
995 | ||
996 | case SIOCGIFBRDADDR: /* Get the broadcast address */ | |
997 | sin->sin_addr.s_addr = ifa->ifa_broadcast; | |
998 | goto rarok; | |
999 | ||
1000 | case SIOCGIFDSTADDR: /* Get the destination address */ | |
1001 | sin->sin_addr.s_addr = ifa->ifa_address; | |
1002 | goto rarok; | |
1003 | ||
1004 | case SIOCGIFNETMASK: /* Get the netmask for the interface */ | |
1005 | sin->sin_addr.s_addr = ifa->ifa_mask; | |
1006 | goto rarok; | |
1007 | ||
1008 | case SIOCSIFFLAGS: | |
1009 | if (colon) { | |
1010 | ret = -EADDRNOTAVAIL; | |
1011 | if (!ifa) | |
1012 | break; | |
1013 | ret = 0; | |
1014 | if (!(ifr.ifr_flags & IFF_UP)) | |
1015 | inet_del_ifa(in_dev, ifap, 1); | |
1016 | break; | |
1017 | } | |
1018 | ret = dev_change_flags(dev, ifr.ifr_flags); | |
1019 | break; | |
1020 | ||
1021 | case SIOCSIFADDR: /* Set interface address (and family) */ | |
1022 | ret = -EINVAL; | |
1023 | if (inet_abc_len(sin->sin_addr.s_addr) < 0) | |
1024 | break; | |
1025 | ||
1026 | if (!ifa) { | |
1027 | ret = -ENOBUFS; | |
9f9354b9 ED |
1028 | ifa = inet_alloc_ifa(); |
1029 | if (!ifa) | |
1da177e4 | 1030 | break; |
c7e2e1d7 | 1031 | INIT_HLIST_NODE(&ifa->hash); |
1da177e4 LT |
1032 | if (colon) |
1033 | memcpy(ifa->ifa_label, ifr.ifr_name, IFNAMSIZ); | |
1034 | else | |
1035 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); | |
1036 | } else { | |
1037 | ret = 0; | |
1038 | if (ifa->ifa_local == sin->sin_addr.s_addr) | |
1039 | break; | |
1040 | inet_del_ifa(in_dev, ifap, 0); | |
1041 | ifa->ifa_broadcast = 0; | |
148f9729 | 1042 | ifa->ifa_scope = 0; |
1da177e4 LT |
1043 | } |
1044 | ||
1045 | ifa->ifa_address = ifa->ifa_local = sin->sin_addr.s_addr; | |
1046 | ||
1047 | if (!(dev->flags & IFF_POINTOPOINT)) { | |
1048 | ifa->ifa_prefixlen = inet_abc_len(ifa->ifa_address); | |
1049 | ifa->ifa_mask = inet_make_mask(ifa->ifa_prefixlen); | |
1050 | if ((dev->flags & IFF_BROADCAST) && | |
1051 | ifa->ifa_prefixlen < 31) | |
1052 | ifa->ifa_broadcast = ifa->ifa_address | | |
1053 | ~ifa->ifa_mask; | |
1054 | } else { | |
1055 | ifa->ifa_prefixlen = 32; | |
1056 | ifa->ifa_mask = inet_make_mask(32); | |
1057 | } | |
5c766d64 | 1058 | set_ifa_lifetime(ifa, INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); |
1da177e4 LT |
1059 | ret = inet_set_ifa(dev, ifa); |
1060 | break; | |
1061 | ||
1062 | case SIOCSIFBRDADDR: /* Set the broadcast address */ | |
1063 | ret = 0; | |
1064 | if (ifa->ifa_broadcast != sin->sin_addr.s_addr) { | |
1065 | inet_del_ifa(in_dev, ifap, 0); | |
1066 | ifa->ifa_broadcast = sin->sin_addr.s_addr; | |
1067 | inet_insert_ifa(ifa); | |
1068 | } | |
1069 | break; | |
1070 | ||
1071 | case SIOCSIFDSTADDR: /* Set the destination address */ | |
1072 | ret = 0; | |
1073 | if (ifa->ifa_address == sin->sin_addr.s_addr) | |
1074 | break; | |
1075 | ret = -EINVAL; | |
1076 | if (inet_abc_len(sin->sin_addr.s_addr) < 0) | |
1077 | break; | |
1078 | ret = 0; | |
1079 | inet_del_ifa(in_dev, ifap, 0); | |
1080 | ifa->ifa_address = sin->sin_addr.s_addr; | |
1081 | inet_insert_ifa(ifa); | |
1082 | break; | |
1083 | ||
1084 | case SIOCSIFNETMASK: /* Set the netmask for the interface */ | |
1085 | ||
1086 | /* | |
1087 | * The mask we set must be legal. | |
1088 | */ | |
1089 | ret = -EINVAL; | |
1090 | if (bad_mask(sin->sin_addr.s_addr, 0)) | |
1091 | break; | |
1092 | ret = 0; | |
1093 | if (ifa->ifa_mask != sin->sin_addr.s_addr) { | |
a144ea4b | 1094 | __be32 old_mask = ifa->ifa_mask; |
1da177e4 LT |
1095 | inet_del_ifa(in_dev, ifap, 0); |
1096 | ifa->ifa_mask = sin->sin_addr.s_addr; | |
1097 | ifa->ifa_prefixlen = inet_mask_len(ifa->ifa_mask); | |
1098 | ||
1099 | /* See if current broadcast address matches | |
1100 | * with current netmask, then recalculate | |
1101 | * the broadcast address. Otherwise it's a | |
1102 | * funny address, so don't touch it since | |
1103 | * the user seems to know what (s)he's doing... | |
1104 | */ | |
1105 | if ((dev->flags & IFF_BROADCAST) && | |
1106 | (ifa->ifa_prefixlen < 31) && | |
1107 | (ifa->ifa_broadcast == | |
dcab5e1e | 1108 | (ifa->ifa_local|~old_mask))) { |
1da177e4 LT |
1109 | ifa->ifa_broadcast = (ifa->ifa_local | |
1110 | ~sin->sin_addr.s_addr); | |
1111 | } | |
1112 | inet_insert_ifa(ifa); | |
1113 | } | |
1114 | break; | |
1115 | } | |
1116 | done: | |
1117 | rtnl_unlock(); | |
1118 | out: | |
1119 | return ret; | |
1120 | rarok: | |
1121 | rtnl_unlock(); | |
1122 | ret = copy_to_user(arg, &ifr, sizeof(struct ifreq)) ? -EFAULT : 0; | |
1123 | goto out; | |
1124 | } | |
1125 | ||
1126 | static int inet_gifconf(struct net_device *dev, char __user *buf, int len) | |
1127 | { | |
e5ed6399 | 1128 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
1da177e4 LT |
1129 | struct in_ifaddr *ifa; |
1130 | struct ifreq ifr; | |
1131 | int done = 0; | |
1132 | ||
9f9354b9 | 1133 | if (!in_dev) |
1da177e4 LT |
1134 | goto out; |
1135 | ||
9f9354b9 | 1136 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { |
1da177e4 LT |
1137 | if (!buf) { |
1138 | done += sizeof(ifr); | |
1139 | continue; | |
1140 | } | |
1141 | if (len < (int) sizeof(ifr)) | |
1142 | break; | |
1143 | memset(&ifr, 0, sizeof(struct ifreq)); | |
4299c8a9 | 1144 | strcpy(ifr.ifr_name, ifa->ifa_label); |
1da177e4 LT |
1145 | |
1146 | (*(struct sockaddr_in *)&ifr.ifr_addr).sin_family = AF_INET; | |
1147 | (*(struct sockaddr_in *)&ifr.ifr_addr).sin_addr.s_addr = | |
1148 | ifa->ifa_local; | |
1149 | ||
1150 | if (copy_to_user(buf, &ifr, sizeof(struct ifreq))) { | |
1151 | done = -EFAULT; | |
1152 | break; | |
1153 | } | |
1154 | buf += sizeof(struct ifreq); | |
1155 | len -= sizeof(struct ifreq); | |
1156 | done += sizeof(struct ifreq); | |
1157 | } | |
1158 | out: | |
1159 | return done; | |
1160 | } | |
1161 | ||
a61ced5d | 1162 | __be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope) |
1da177e4 | 1163 | { |
a61ced5d | 1164 | __be32 addr = 0; |
1da177e4 | 1165 | struct in_device *in_dev; |
c346dca1 | 1166 | struct net *net = dev_net(dev); |
1da177e4 LT |
1167 | |
1168 | rcu_read_lock(); | |
e5ed6399 | 1169 | in_dev = __in_dev_get_rcu(dev); |
1da177e4 LT |
1170 | if (!in_dev) |
1171 | goto no_in_dev; | |
1172 | ||
1173 | for_primary_ifa(in_dev) { | |
1174 | if (ifa->ifa_scope > scope) | |
1175 | continue; | |
1176 | if (!dst || inet_ifa_match(dst, ifa)) { | |
1177 | addr = ifa->ifa_local; | |
1178 | break; | |
1179 | } | |
1180 | if (!addr) | |
1181 | addr = ifa->ifa_local; | |
1182 | } endfor_ifa(in_dev); | |
1da177e4 LT |
1183 | |
1184 | if (addr) | |
c6d14c84 | 1185 | goto out_unlock; |
9f9354b9 | 1186 | no_in_dev: |
1da177e4 LT |
1187 | |
1188 | /* Not loopback addresses on loopback should be preferred | |
1189 | in this case. It is importnat that lo is the first interface | |
1190 | in dev_base list. | |
1191 | */ | |
c6d14c84 | 1192 | for_each_netdev_rcu(net, dev) { |
9f9354b9 ED |
1193 | in_dev = __in_dev_get_rcu(dev); |
1194 | if (!in_dev) | |
1da177e4 LT |
1195 | continue; |
1196 | ||
1197 | for_primary_ifa(in_dev) { | |
1198 | if (ifa->ifa_scope != RT_SCOPE_LINK && | |
1199 | ifa->ifa_scope <= scope) { | |
1200 | addr = ifa->ifa_local; | |
c6d14c84 | 1201 | goto out_unlock; |
1da177e4 LT |
1202 | } |
1203 | } endfor_ifa(in_dev); | |
1204 | } | |
c6d14c84 | 1205 | out_unlock: |
1da177e4 | 1206 | rcu_read_unlock(); |
1da177e4 LT |
1207 | return addr; |
1208 | } | |
9f9354b9 | 1209 | EXPORT_SYMBOL(inet_select_addr); |
1da177e4 | 1210 | |
60cad5da AV |
1211 | static __be32 confirm_addr_indev(struct in_device *in_dev, __be32 dst, |
1212 | __be32 local, int scope) | |
1da177e4 LT |
1213 | { |
1214 | int same = 0; | |
a144ea4b | 1215 | __be32 addr = 0; |
1da177e4 LT |
1216 | |
1217 | for_ifa(in_dev) { | |
1218 | if (!addr && | |
1219 | (local == ifa->ifa_local || !local) && | |
1220 | ifa->ifa_scope <= scope) { | |
1221 | addr = ifa->ifa_local; | |
1222 | if (same) | |
1223 | break; | |
1224 | } | |
1225 | if (!same) { | |
1226 | same = (!local || inet_ifa_match(local, ifa)) && | |
1227 | (!dst || inet_ifa_match(dst, ifa)); | |
1228 | if (same && addr) { | |
1229 | if (local || !dst) | |
1230 | break; | |
1231 | /* Is the selected addr into dst subnet? */ | |
1232 | if (inet_ifa_match(addr, ifa)) | |
1233 | break; | |
1234 | /* No, then can we use new local src? */ | |
1235 | if (ifa->ifa_scope <= scope) { | |
1236 | addr = ifa->ifa_local; | |
1237 | break; | |
1238 | } | |
1239 | /* search for large dst subnet for addr */ | |
1240 | same = 0; | |
1241 | } | |
1242 | } | |
1243 | } endfor_ifa(in_dev); | |
1244 | ||
9f9354b9 | 1245 | return same ? addr : 0; |
1da177e4 LT |
1246 | } |
1247 | ||
1248 | /* | |
1249 | * Confirm that local IP address exists using wildcards: | |
b601fa19 ND |
1250 | * - net: netns to check, cannot be NULL |
1251 | * - in_dev: only on this interface, NULL=any interface | |
1da177e4 LT |
1252 | * - dst: only in the same subnet as dst, 0=any dst |
1253 | * - local: address, 0=autoselect the local address | |
1254 | * - scope: maximum allowed scope value for the local address | |
1255 | */ | |
b601fa19 | 1256 | __be32 inet_confirm_addr(struct net *net, struct in_device *in_dev, |
9bd85e32 | 1257 | __be32 dst, __be32 local, int scope) |
1da177e4 | 1258 | { |
60cad5da | 1259 | __be32 addr = 0; |
9bd85e32 | 1260 | struct net_device *dev; |
1da177e4 | 1261 | |
b601fa19 | 1262 | if (in_dev != NULL) |
9bd85e32 | 1263 | return confirm_addr_indev(in_dev, dst, local, scope); |
1da177e4 | 1264 | |
1da177e4 | 1265 | rcu_read_lock(); |
c6d14c84 | 1266 | for_each_netdev_rcu(net, dev) { |
9f9354b9 ED |
1267 | in_dev = __in_dev_get_rcu(dev); |
1268 | if (in_dev) { | |
1da177e4 LT |
1269 | addr = confirm_addr_indev(in_dev, dst, local, scope); |
1270 | if (addr) | |
1271 | break; | |
1272 | } | |
1273 | } | |
1274 | rcu_read_unlock(); | |
1da177e4 LT |
1275 | |
1276 | return addr; | |
1277 | } | |
eaddcd76 | 1278 | EXPORT_SYMBOL(inet_confirm_addr); |
1da177e4 LT |
1279 | |
1280 | /* | |
1281 | * Device notifier | |
1282 | */ | |
1283 | ||
1284 | int register_inetaddr_notifier(struct notifier_block *nb) | |
1285 | { | |
e041c683 | 1286 | return blocking_notifier_chain_register(&inetaddr_chain, nb); |
1da177e4 | 1287 | } |
9f9354b9 | 1288 | EXPORT_SYMBOL(register_inetaddr_notifier); |
1da177e4 LT |
1289 | |
1290 | int unregister_inetaddr_notifier(struct notifier_block *nb) | |
1291 | { | |
e041c683 | 1292 | return blocking_notifier_chain_unregister(&inetaddr_chain, nb); |
1da177e4 | 1293 | } |
9f9354b9 | 1294 | EXPORT_SYMBOL(unregister_inetaddr_notifier); |
1da177e4 | 1295 | |
9f9354b9 ED |
1296 | /* Rename ifa_labels for a device name change. Make some effort to preserve |
1297 | * existing alias numbering and to create unique labels if possible. | |
1da177e4 LT |
1298 | */ |
1299 | static void inetdev_changename(struct net_device *dev, struct in_device *in_dev) | |
e905a9ed | 1300 | { |
1da177e4 LT |
1301 | struct in_ifaddr *ifa; |
1302 | int named = 0; | |
1303 | ||
e905a9ed YH |
1304 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { |
1305 | char old[IFNAMSIZ], *dot; | |
1da177e4 LT |
1306 | |
1307 | memcpy(old, ifa->ifa_label, IFNAMSIZ); | |
e905a9ed | 1308 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); |
1da177e4 | 1309 | if (named++ == 0) |
573bf470 | 1310 | goto skip; |
44344b2a | 1311 | dot = strchr(old, ':'); |
e905a9ed YH |
1312 | if (dot == NULL) { |
1313 | sprintf(old, ":%d", named); | |
1da177e4 LT |
1314 | dot = old; |
1315 | } | |
9f9354b9 | 1316 | if (strlen(dot) + strlen(dev->name) < IFNAMSIZ) |
e905a9ed | 1317 | strcat(ifa->ifa_label, dot); |
9f9354b9 | 1318 | else |
e905a9ed | 1319 | strcpy(ifa->ifa_label + (IFNAMSIZ - strlen(dot) - 1), dot); |
573bf470 TG |
1320 | skip: |
1321 | rtmsg_ifa(RTM_NEWADDR, ifa, NULL, 0); | |
e905a9ed YH |
1322 | } |
1323 | } | |
1da177e4 | 1324 | |
40384999 | 1325 | static bool inetdev_valid_mtu(unsigned int mtu) |
06770843 BL |
1326 | { |
1327 | return mtu >= 68; | |
1328 | } | |
1329 | ||
d11327ad IC |
1330 | static void inetdev_send_gratuitous_arp(struct net_device *dev, |
1331 | struct in_device *in_dev) | |
1332 | ||
1333 | { | |
b76d0789 | 1334 | struct in_ifaddr *ifa; |
d11327ad | 1335 | |
b76d0789 ZK |
1336 | for (ifa = in_dev->ifa_list; ifa; |
1337 | ifa = ifa->ifa_next) { | |
1338 | arp_send(ARPOP_REQUEST, ETH_P_ARP, | |
1339 | ifa->ifa_local, dev, | |
1340 | ifa->ifa_local, NULL, | |
1341 | dev->dev_addr, NULL); | |
1342 | } | |
d11327ad IC |
1343 | } |
1344 | ||
1da177e4 LT |
1345 | /* Called only under RTNL semaphore */ |
1346 | ||
1347 | static int inetdev_event(struct notifier_block *this, unsigned long event, | |
1348 | void *ptr) | |
1349 | { | |
351638e7 | 1350 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
748e2d93 | 1351 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
0115e8e3 | 1352 | |
1da177e4 LT |
1353 | ASSERT_RTNL(); |
1354 | ||
1355 | if (!in_dev) { | |
8030f544 | 1356 | if (event == NETDEV_REGISTER) { |
1da177e4 | 1357 | in_dev = inetdev_init(dev); |
20e61da7 WC |
1358 | if (IS_ERR(in_dev)) |
1359 | return notifier_from_errno(PTR_ERR(in_dev)); | |
0cc217e1 | 1360 | if (dev->flags & IFF_LOOPBACK) { |
42f811b8 HX |
1361 | IN_DEV_CONF_SET(in_dev, NOXFRM, 1); |
1362 | IN_DEV_CONF_SET(in_dev, NOPOLICY, 1); | |
8030f544 | 1363 | } |
06770843 BL |
1364 | } else if (event == NETDEV_CHANGEMTU) { |
1365 | /* Re-enabling IP */ | |
1366 | if (inetdev_valid_mtu(dev->mtu)) | |
1367 | in_dev = inetdev_init(dev); | |
1da177e4 LT |
1368 | } |
1369 | goto out; | |
1370 | } | |
1371 | ||
1372 | switch (event) { | |
1373 | case NETDEV_REGISTER: | |
91df42be | 1374 | pr_debug("%s: bug\n", __func__); |
a9b3cd7f | 1375 | RCU_INIT_POINTER(dev->ip_ptr, NULL); |
1da177e4 LT |
1376 | break; |
1377 | case NETDEV_UP: | |
06770843 | 1378 | if (!inetdev_valid_mtu(dev->mtu)) |
1da177e4 | 1379 | break; |
0cc217e1 | 1380 | if (dev->flags & IFF_LOOPBACK) { |
9f9354b9 ED |
1381 | struct in_ifaddr *ifa = inet_alloc_ifa(); |
1382 | ||
1383 | if (ifa) { | |
fd23c3b3 | 1384 | INIT_HLIST_NODE(&ifa->hash); |
1da177e4 LT |
1385 | ifa->ifa_local = |
1386 | ifa->ifa_address = htonl(INADDR_LOOPBACK); | |
1387 | ifa->ifa_prefixlen = 8; | |
1388 | ifa->ifa_mask = inet_make_mask(8); | |
1389 | in_dev_hold(in_dev); | |
1390 | ifa->ifa_dev = in_dev; | |
1391 | ifa->ifa_scope = RT_SCOPE_HOST; | |
1392 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); | |
5c766d64 JP |
1393 | set_ifa_lifetime(ifa, INFINITY_LIFE_TIME, |
1394 | INFINITY_LIFE_TIME); | |
dfd1582d JP |
1395 | ipv4_devconf_setall(in_dev); |
1396 | neigh_parms_data_state_setall(in_dev->arp_parms); | |
1da177e4 LT |
1397 | inet_insert_ifa(ifa); |
1398 | } | |
1399 | } | |
1400 | ip_mc_up(in_dev); | |
eefef1cf SH |
1401 | /* fall through */ |
1402 | case NETDEV_CHANGEADDR: | |
d11327ad IC |
1403 | if (!IN_DEV_ARP_NOTIFY(in_dev)) |
1404 | break; | |
1405 | /* fall through */ | |
1406 | case NETDEV_NOTIFY_PEERS: | |
a21090cf | 1407 | /* Send gratuitous ARP to notify of link change */ |
d11327ad | 1408 | inetdev_send_gratuitous_arp(dev, in_dev); |
1da177e4 LT |
1409 | break; |
1410 | case NETDEV_DOWN: | |
1411 | ip_mc_down(in_dev); | |
1412 | break; | |
93d9b7d7 | 1413 | case NETDEV_PRE_TYPE_CHANGE: |
75c78500 MS |
1414 | ip_mc_unmap(in_dev); |
1415 | break; | |
93d9b7d7 | 1416 | case NETDEV_POST_TYPE_CHANGE: |
75c78500 MS |
1417 | ip_mc_remap(in_dev); |
1418 | break; | |
1da177e4 | 1419 | case NETDEV_CHANGEMTU: |
06770843 | 1420 | if (inetdev_valid_mtu(dev->mtu)) |
1da177e4 | 1421 | break; |
06770843 | 1422 | /* disable IP when MTU is not enough */ |
1da177e4 LT |
1423 | case NETDEV_UNREGISTER: |
1424 | inetdev_destroy(in_dev); | |
1425 | break; | |
1426 | case NETDEV_CHANGENAME: | |
1427 | /* Do not notify about label change, this event is | |
1428 | * not interesting to applications using netlink. | |
1429 | */ | |
1430 | inetdev_changename(dev, in_dev); | |
1431 | ||
51602b2a | 1432 | devinet_sysctl_unregister(in_dev); |
66f27a52 | 1433 | devinet_sysctl_register(in_dev); |
1da177e4 LT |
1434 | break; |
1435 | } | |
1436 | out: | |
1437 | return NOTIFY_DONE; | |
1438 | } | |
1439 | ||
1440 | static struct notifier_block ip_netdev_notifier = { | |
539afedf | 1441 | .notifier_call = inetdev_event, |
1da177e4 LT |
1442 | }; |
1443 | ||
40384999 | 1444 | static size_t inet_nlmsg_size(void) |
339bf98f TG |
1445 | { |
1446 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) | |
1447 | + nla_total_size(4) /* IFA_ADDRESS */ | |
1448 | + nla_total_size(4) /* IFA_LOCAL */ | |
1449 | + nla_total_size(4) /* IFA_BROADCAST */ | |
ad6c8135 | 1450 | + nla_total_size(IFNAMSIZ) /* IFA_LABEL */ |
63b5f152 GU |
1451 | + nla_total_size(4) /* IFA_FLAGS */ |
1452 | + nla_total_size(sizeof(struct ifa_cacheinfo)); /* IFA_CACHEINFO */ | |
339bf98f TG |
1453 | } |
1454 | ||
5c766d64 JP |
1455 | static inline u32 cstamp_delta(unsigned long cstamp) |
1456 | { | |
1457 | return (cstamp - INITIAL_JIFFIES) * 100UL / HZ; | |
1458 | } | |
1459 | ||
1460 | static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, | |
1461 | unsigned long tstamp, u32 preferred, u32 valid) | |
1462 | { | |
1463 | struct ifa_cacheinfo ci; | |
1464 | ||
1465 | ci.cstamp = cstamp_delta(cstamp); | |
1466 | ci.tstamp = cstamp_delta(tstamp); | |
1467 | ci.ifa_prefered = preferred; | |
1468 | ci.ifa_valid = valid; | |
1469 | ||
1470 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
1471 | } | |
1472 | ||
1da177e4 | 1473 | static int inet_fill_ifaddr(struct sk_buff *skb, struct in_ifaddr *ifa, |
15e47304 | 1474 | u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4 LT |
1475 | { |
1476 | struct ifaddrmsg *ifm; | |
1477 | struct nlmsghdr *nlh; | |
5c766d64 | 1478 | u32 preferred, valid; |
1da177e4 | 1479 | |
15e47304 | 1480 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*ifm), flags); |
47f68512 | 1481 | if (nlh == NULL) |
26932566 | 1482 | return -EMSGSIZE; |
47f68512 TG |
1483 | |
1484 | ifm = nlmsg_data(nlh); | |
1da177e4 LT |
1485 | ifm->ifa_family = AF_INET; |
1486 | ifm->ifa_prefixlen = ifa->ifa_prefixlen; | |
5c766d64 | 1487 | ifm->ifa_flags = ifa->ifa_flags; |
1da177e4 LT |
1488 | ifm->ifa_scope = ifa->ifa_scope; |
1489 | ifm->ifa_index = ifa->ifa_dev->dev->ifindex; | |
47f68512 | 1490 | |
5c766d64 JP |
1491 | if (!(ifm->ifa_flags & IFA_F_PERMANENT)) { |
1492 | preferred = ifa->ifa_preferred_lft; | |
1493 | valid = ifa->ifa_valid_lft; | |
1494 | if (preferred != INFINITY_LIFE_TIME) { | |
1495 | long tval = (jiffies - ifa->ifa_tstamp) / HZ; | |
1496 | ||
1497 | if (preferred > tval) | |
1498 | preferred -= tval; | |
1499 | else | |
1500 | preferred = 0; | |
1501 | if (valid != INFINITY_LIFE_TIME) { | |
1502 | if (valid > tval) | |
1503 | valid -= tval; | |
1504 | else | |
1505 | valid = 0; | |
1506 | } | |
1507 | } | |
1508 | } else { | |
1509 | preferred = INFINITY_LIFE_TIME; | |
1510 | valid = INFINITY_LIFE_TIME; | |
1511 | } | |
f3756b79 DM |
1512 | if ((ifa->ifa_address && |
1513 | nla_put_be32(skb, IFA_ADDRESS, ifa->ifa_address)) || | |
1514 | (ifa->ifa_local && | |
1515 | nla_put_be32(skb, IFA_LOCAL, ifa->ifa_local)) || | |
1516 | (ifa->ifa_broadcast && | |
1517 | nla_put_be32(skb, IFA_BROADCAST, ifa->ifa_broadcast)) || | |
1518 | (ifa->ifa_label[0] && | |
5c766d64 | 1519 | nla_put_string(skb, IFA_LABEL, ifa->ifa_label)) || |
ad6c8135 | 1520 | nla_put_u32(skb, IFA_FLAGS, ifa->ifa_flags) || |
5c766d64 JP |
1521 | put_cacheinfo(skb, ifa->ifa_cstamp, ifa->ifa_tstamp, |
1522 | preferred, valid)) | |
f3756b79 | 1523 | goto nla_put_failure; |
1da177e4 | 1524 | |
47f68512 TG |
1525 | return nlmsg_end(skb, nlh); |
1526 | ||
1527 | nla_put_failure: | |
26932566 PM |
1528 | nlmsg_cancel(skb, nlh); |
1529 | return -EMSGSIZE; | |
1da177e4 LT |
1530 | } |
1531 | ||
1532 | static int inet_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
1533 | { | |
3b1e0a65 | 1534 | struct net *net = sock_net(skb->sk); |
eec4df98 ED |
1535 | int h, s_h; |
1536 | int idx, s_idx; | |
1537 | int ip_idx, s_ip_idx; | |
1da177e4 LT |
1538 | struct net_device *dev; |
1539 | struct in_device *in_dev; | |
1540 | struct in_ifaddr *ifa; | |
eec4df98 | 1541 | struct hlist_head *head; |
1da177e4 | 1542 | |
eec4df98 ED |
1543 | s_h = cb->args[0]; |
1544 | s_idx = idx = cb->args[1]; | |
1545 | s_ip_idx = ip_idx = cb->args[2]; | |
1546 | ||
1547 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
1548 | idx = 0; | |
1549 | head = &net->dev_index_head[h]; | |
1550 | rcu_read_lock(); | |
0465277f ND |
1551 | cb->seq = atomic_read(&net->ipv4.dev_addr_genid) ^ |
1552 | net->dev_base_seq; | |
b67bfe0d | 1553 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
eec4df98 ED |
1554 | if (idx < s_idx) |
1555 | goto cont; | |
4b97efdf | 1556 | if (h > s_h || idx > s_idx) |
eec4df98 ED |
1557 | s_ip_idx = 0; |
1558 | in_dev = __in_dev_get_rcu(dev); | |
1559 | if (!in_dev) | |
1560 | goto cont; | |
1da177e4 | 1561 | |
eec4df98 ED |
1562 | for (ifa = in_dev->ifa_list, ip_idx = 0; ifa; |
1563 | ifa = ifa->ifa_next, ip_idx++) { | |
1564 | if (ip_idx < s_ip_idx) | |
1565 | continue; | |
1566 | if (inet_fill_ifaddr(skb, ifa, | |
15e47304 | 1567 | NETLINK_CB(cb->skb).portid, |
1da177e4 | 1568 | cb->nlh->nlmsg_seq, |
eec4df98 ED |
1569 | RTM_NEWADDR, NLM_F_MULTI) <= 0) { |
1570 | rcu_read_unlock(); | |
1571 | goto done; | |
1572 | } | |
0465277f | 1573 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
eec4df98 | 1574 | } |
7562f876 | 1575 | cont: |
eec4df98 ED |
1576 | idx++; |
1577 | } | |
1578 | rcu_read_unlock(); | |
1da177e4 LT |
1579 | } |
1580 | ||
1581 | done: | |
eec4df98 ED |
1582 | cb->args[0] = h; |
1583 | cb->args[1] = idx; | |
1584 | cb->args[2] = ip_idx; | |
1da177e4 LT |
1585 | |
1586 | return skb->len; | |
1587 | } | |
1588 | ||
539afedf | 1589 | static void rtmsg_ifa(int event, struct in_ifaddr *ifa, struct nlmsghdr *nlh, |
15e47304 | 1590 | u32 portid) |
1da177e4 | 1591 | { |
47f68512 | 1592 | struct sk_buff *skb; |
d6062cbb TG |
1593 | u32 seq = nlh ? nlh->nlmsg_seq : 0; |
1594 | int err = -ENOBUFS; | |
4b8aa9ab | 1595 | struct net *net; |
1da177e4 | 1596 | |
c346dca1 | 1597 | net = dev_net(ifa->ifa_dev->dev); |
339bf98f | 1598 | skb = nlmsg_new(inet_nlmsg_size(), GFP_KERNEL); |
47f68512 | 1599 | if (skb == NULL) |
d6062cbb TG |
1600 | goto errout; |
1601 | ||
15e47304 | 1602 | err = inet_fill_ifaddr(skb, ifa, portid, seq, event, 0); |
26932566 PM |
1603 | if (err < 0) { |
1604 | /* -EMSGSIZE implies BUG in inet_nlmsg_size() */ | |
1605 | WARN_ON(err == -EMSGSIZE); | |
1606 | kfree_skb(skb); | |
1607 | goto errout; | |
1608 | } | |
15e47304 | 1609 | rtnl_notify(skb, net, portid, RTNLGRP_IPV4_IFADDR, nlh, GFP_KERNEL); |
1ce85fe4 | 1610 | return; |
d6062cbb TG |
1611 | errout: |
1612 | if (err < 0) | |
4b8aa9ab | 1613 | rtnl_set_sk_err(net, RTNLGRP_IPV4_IFADDR, err); |
1da177e4 LT |
1614 | } |
1615 | ||
9f0f7272 TG |
1616 | static size_t inet_get_link_af_size(const struct net_device *dev) |
1617 | { | |
1fc19aff | 1618 | struct in_device *in_dev = rcu_dereference_rtnl(dev->ip_ptr); |
9f0f7272 TG |
1619 | |
1620 | if (!in_dev) | |
1621 | return 0; | |
1622 | ||
1623 | return nla_total_size(IPV4_DEVCONF_MAX * 4); /* IFLA_INET_CONF */ | |
1624 | } | |
1625 | ||
1626 | static int inet_fill_link_af(struct sk_buff *skb, const struct net_device *dev) | |
1627 | { | |
1fc19aff | 1628 | struct in_device *in_dev = rcu_dereference_rtnl(dev->ip_ptr); |
9f0f7272 TG |
1629 | struct nlattr *nla; |
1630 | int i; | |
1631 | ||
1632 | if (!in_dev) | |
1633 | return -ENODATA; | |
1634 | ||
1635 | nla = nla_reserve(skb, IFLA_INET_CONF, IPV4_DEVCONF_MAX * 4); | |
1636 | if (nla == NULL) | |
1637 | return -EMSGSIZE; | |
1638 | ||
1639 | for (i = 0; i < IPV4_DEVCONF_MAX; i++) | |
1640 | ((u32 *) nla_data(nla))[i] = in_dev->cnf.data[i]; | |
1641 | ||
1642 | return 0; | |
1643 | } | |
1644 | ||
1645 | static const struct nla_policy inet_af_policy[IFLA_INET_MAX+1] = { | |
1646 | [IFLA_INET_CONF] = { .type = NLA_NESTED }, | |
1647 | }; | |
1648 | ||
cf7afbfe TG |
1649 | static int inet_validate_link_af(const struct net_device *dev, |
1650 | const struct nlattr *nla) | |
9f0f7272 | 1651 | { |
9f0f7272 TG |
1652 | struct nlattr *a, *tb[IFLA_INET_MAX+1]; |
1653 | int err, rem; | |
1654 | ||
f7fce74e | 1655 | if (dev && !__in_dev_get_rtnl(dev)) |
cf7afbfe | 1656 | return -EAFNOSUPPORT; |
9f0f7272 TG |
1657 | |
1658 | err = nla_parse_nested(tb, IFLA_INET_MAX, nla, inet_af_policy); | |
1659 | if (err < 0) | |
1660 | return err; | |
1661 | ||
1662 | if (tb[IFLA_INET_CONF]) { | |
1663 | nla_for_each_nested(a, tb[IFLA_INET_CONF], rem) { | |
1664 | int cfgid = nla_type(a); | |
1665 | ||
1666 | if (nla_len(a) < 4) | |
1667 | return -EINVAL; | |
1668 | ||
1669 | if (cfgid <= 0 || cfgid > IPV4_DEVCONF_MAX) | |
1670 | return -EINVAL; | |
1671 | } | |
1672 | } | |
1673 | ||
cf7afbfe TG |
1674 | return 0; |
1675 | } | |
1676 | ||
1677 | static int inet_set_link_af(struct net_device *dev, const struct nlattr *nla) | |
1678 | { | |
f7fce74e | 1679 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
cf7afbfe TG |
1680 | struct nlattr *a, *tb[IFLA_INET_MAX+1]; |
1681 | int rem; | |
1682 | ||
1683 | if (!in_dev) | |
1684 | return -EAFNOSUPPORT; | |
1685 | ||
1686 | if (nla_parse_nested(tb, IFLA_INET_MAX, nla, NULL) < 0) | |
1687 | BUG(); | |
1688 | ||
9f0f7272 TG |
1689 | if (tb[IFLA_INET_CONF]) { |
1690 | nla_for_each_nested(a, tb[IFLA_INET_CONF], rem) | |
1691 | ipv4_devconf_set(in_dev, nla_type(a), nla_get_u32(a)); | |
1692 | } | |
1693 | ||
1694 | return 0; | |
1695 | } | |
1696 | ||
edc9e748 ND |
1697 | static int inet_netconf_msgsize_devconf(int type) |
1698 | { | |
1699 | int size = NLMSG_ALIGN(sizeof(struct netconfmsg)) | |
1700 | + nla_total_size(4); /* NETCONFA_IFINDEX */ | |
1701 | ||
9e551110 ND |
1702 | /* type -1 is used for ALL */ |
1703 | if (type == -1 || type == NETCONFA_FORWARDING) | |
edc9e748 | 1704 | size += nla_total_size(4); |
cc535dfb ND |
1705 | if (type == -1 || type == NETCONFA_RP_FILTER) |
1706 | size += nla_total_size(4); | |
d67b8c61 ND |
1707 | if (type == -1 || type == NETCONFA_MC_FORWARDING) |
1708 | size += nla_total_size(4); | |
09aea5df | 1709 | if (type == -1 || type == NETCONFA_PROXY_NEIGH) |
f085ff1c | 1710 | size += nla_total_size(4); |
edc9e748 ND |
1711 | |
1712 | return size; | |
1713 | } | |
1714 | ||
1715 | static int inet_netconf_fill_devconf(struct sk_buff *skb, int ifindex, | |
1716 | struct ipv4_devconf *devconf, u32 portid, | |
1717 | u32 seq, int event, unsigned int flags, | |
1718 | int type) | |
1719 | { | |
1720 | struct nlmsghdr *nlh; | |
1721 | struct netconfmsg *ncm; | |
1722 | ||
1723 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct netconfmsg), | |
1724 | flags); | |
1725 | if (nlh == NULL) | |
1726 | return -EMSGSIZE; | |
1727 | ||
1728 | ncm = nlmsg_data(nlh); | |
1729 | ncm->ncm_family = AF_INET; | |
1730 | ||
1731 | if (nla_put_s32(skb, NETCONFA_IFINDEX, ifindex) < 0) | |
1732 | goto nla_put_failure; | |
1733 | ||
9e551110 ND |
1734 | /* type -1 is used for ALL */ |
1735 | if ((type == -1 || type == NETCONFA_FORWARDING) && | |
edc9e748 ND |
1736 | nla_put_s32(skb, NETCONFA_FORWARDING, |
1737 | IPV4_DEVCONF(*devconf, FORWARDING)) < 0) | |
1738 | goto nla_put_failure; | |
cc535dfb ND |
1739 | if ((type == -1 || type == NETCONFA_RP_FILTER) && |
1740 | nla_put_s32(skb, NETCONFA_RP_FILTER, | |
1741 | IPV4_DEVCONF(*devconf, RP_FILTER)) < 0) | |
1742 | goto nla_put_failure; | |
d67b8c61 ND |
1743 | if ((type == -1 || type == NETCONFA_MC_FORWARDING) && |
1744 | nla_put_s32(skb, NETCONFA_MC_FORWARDING, | |
1745 | IPV4_DEVCONF(*devconf, MC_FORWARDING)) < 0) | |
1746 | goto nla_put_failure; | |
09aea5df | 1747 | if ((type == -1 || type == NETCONFA_PROXY_NEIGH) && |
1748 | nla_put_s32(skb, NETCONFA_PROXY_NEIGH, | |
f085ff1c | 1749 | IPV4_DEVCONF(*devconf, PROXY_ARP)) < 0) |
1750 | goto nla_put_failure; | |
edc9e748 ND |
1751 | |
1752 | return nlmsg_end(skb, nlh); | |
1753 | ||
1754 | nla_put_failure: | |
1755 | nlmsg_cancel(skb, nlh); | |
1756 | return -EMSGSIZE; | |
1757 | } | |
1758 | ||
d67b8c61 ND |
1759 | void inet_netconf_notify_devconf(struct net *net, int type, int ifindex, |
1760 | struct ipv4_devconf *devconf) | |
edc9e748 ND |
1761 | { |
1762 | struct sk_buff *skb; | |
1763 | int err = -ENOBUFS; | |
1764 | ||
1765 | skb = nlmsg_new(inet_netconf_msgsize_devconf(type), GFP_ATOMIC); | |
1766 | if (skb == NULL) | |
1767 | goto errout; | |
1768 | ||
1769 | err = inet_netconf_fill_devconf(skb, ifindex, devconf, 0, 0, | |
1770 | RTM_NEWNETCONF, 0, type); | |
1771 | if (err < 0) { | |
1772 | /* -EMSGSIZE implies BUG in inet_netconf_msgsize_devconf() */ | |
1773 | WARN_ON(err == -EMSGSIZE); | |
1774 | kfree_skb(skb); | |
1775 | goto errout; | |
1776 | } | |
1777 | rtnl_notify(skb, net, 0, RTNLGRP_IPV4_NETCONF, NULL, GFP_ATOMIC); | |
1778 | return; | |
1779 | errout: | |
1780 | if (err < 0) | |
1781 | rtnl_set_sk_err(net, RTNLGRP_IPV4_NETCONF, err); | |
1782 | } | |
1783 | ||
9e551110 ND |
1784 | static const struct nla_policy devconf_ipv4_policy[NETCONFA_MAX+1] = { |
1785 | [NETCONFA_IFINDEX] = { .len = sizeof(int) }, | |
1786 | [NETCONFA_FORWARDING] = { .len = sizeof(int) }, | |
cc535dfb | 1787 | [NETCONFA_RP_FILTER] = { .len = sizeof(int) }, |
09aea5df | 1788 | [NETCONFA_PROXY_NEIGH] = { .len = sizeof(int) }, |
9e551110 ND |
1789 | }; |
1790 | ||
1791 | static int inet_netconf_get_devconf(struct sk_buff *in_skb, | |
661d2967 | 1792 | struct nlmsghdr *nlh) |
9e551110 ND |
1793 | { |
1794 | struct net *net = sock_net(in_skb->sk); | |
1795 | struct nlattr *tb[NETCONFA_MAX+1]; | |
1796 | struct netconfmsg *ncm; | |
1797 | struct sk_buff *skb; | |
1798 | struct ipv4_devconf *devconf; | |
1799 | struct in_device *in_dev; | |
1800 | struct net_device *dev; | |
1801 | int ifindex; | |
1802 | int err; | |
1803 | ||
1804 | err = nlmsg_parse(nlh, sizeof(*ncm), tb, NETCONFA_MAX, | |
1805 | devconf_ipv4_policy); | |
1806 | if (err < 0) | |
1807 | goto errout; | |
1808 | ||
1809 | err = EINVAL; | |
1810 | if (!tb[NETCONFA_IFINDEX]) | |
1811 | goto errout; | |
1812 | ||
1813 | ifindex = nla_get_s32(tb[NETCONFA_IFINDEX]); | |
1814 | switch (ifindex) { | |
1815 | case NETCONFA_IFINDEX_ALL: | |
1816 | devconf = net->ipv4.devconf_all; | |
1817 | break; | |
1818 | case NETCONFA_IFINDEX_DEFAULT: | |
1819 | devconf = net->ipv4.devconf_dflt; | |
1820 | break; | |
1821 | default: | |
1822 | dev = __dev_get_by_index(net, ifindex); | |
1823 | if (dev == NULL) | |
1824 | goto errout; | |
1825 | in_dev = __in_dev_get_rtnl(dev); | |
1826 | if (in_dev == NULL) | |
1827 | goto errout; | |
1828 | devconf = &in_dev->cnf; | |
1829 | break; | |
1830 | } | |
1831 | ||
1832 | err = -ENOBUFS; | |
1833 | skb = nlmsg_new(inet_netconf_msgsize_devconf(-1), GFP_ATOMIC); | |
1834 | if (skb == NULL) | |
1835 | goto errout; | |
1836 | ||
1837 | err = inet_netconf_fill_devconf(skb, ifindex, devconf, | |
1838 | NETLINK_CB(in_skb).portid, | |
1839 | nlh->nlmsg_seq, RTM_NEWNETCONF, 0, | |
1840 | -1); | |
1841 | if (err < 0) { | |
1842 | /* -EMSGSIZE implies BUG in inet_netconf_msgsize_devconf() */ | |
1843 | WARN_ON(err == -EMSGSIZE); | |
1844 | kfree_skb(skb); | |
1845 | goto errout; | |
1846 | } | |
1847 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); | |
1848 | errout: | |
1849 | return err; | |
1850 | } | |
1851 | ||
7a674200 ND |
1852 | static int inet_netconf_dump_devconf(struct sk_buff *skb, |
1853 | struct netlink_callback *cb) | |
1854 | { | |
1855 | struct net *net = sock_net(skb->sk); | |
1856 | int h, s_h; | |
1857 | int idx, s_idx; | |
1858 | struct net_device *dev; | |
1859 | struct in_device *in_dev; | |
1860 | struct hlist_head *head; | |
1861 | ||
1862 | s_h = cb->args[0]; | |
1863 | s_idx = idx = cb->args[1]; | |
1864 | ||
1865 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
1866 | idx = 0; | |
1867 | head = &net->dev_index_head[h]; | |
1868 | rcu_read_lock(); | |
0465277f ND |
1869 | cb->seq = atomic_read(&net->ipv4.dev_addr_genid) ^ |
1870 | net->dev_base_seq; | |
7a674200 ND |
1871 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
1872 | if (idx < s_idx) | |
1873 | goto cont; | |
1874 | in_dev = __in_dev_get_rcu(dev); | |
1875 | if (!in_dev) | |
1876 | goto cont; | |
1877 | ||
1878 | if (inet_netconf_fill_devconf(skb, dev->ifindex, | |
1879 | &in_dev->cnf, | |
1880 | NETLINK_CB(cb->skb).portid, | |
1881 | cb->nlh->nlmsg_seq, | |
1882 | RTM_NEWNETCONF, | |
1883 | NLM_F_MULTI, | |
1884 | -1) <= 0) { | |
1885 | rcu_read_unlock(); | |
1886 | goto done; | |
1887 | } | |
0465277f | 1888 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
7a674200 ND |
1889 | cont: |
1890 | idx++; | |
1891 | } | |
1892 | rcu_read_unlock(); | |
1893 | } | |
1894 | if (h == NETDEV_HASHENTRIES) { | |
1895 | if (inet_netconf_fill_devconf(skb, NETCONFA_IFINDEX_ALL, | |
1896 | net->ipv4.devconf_all, | |
1897 | NETLINK_CB(cb->skb).portid, | |
1898 | cb->nlh->nlmsg_seq, | |
1899 | RTM_NEWNETCONF, NLM_F_MULTI, | |
1900 | -1) <= 0) | |
1901 | goto done; | |
1902 | else | |
1903 | h++; | |
1904 | } | |
1905 | if (h == NETDEV_HASHENTRIES + 1) { | |
1906 | if (inet_netconf_fill_devconf(skb, NETCONFA_IFINDEX_DEFAULT, | |
1907 | net->ipv4.devconf_dflt, | |
1908 | NETLINK_CB(cb->skb).portid, | |
1909 | cb->nlh->nlmsg_seq, | |
1910 | RTM_NEWNETCONF, NLM_F_MULTI, | |
1911 | -1) <= 0) | |
1912 | goto done; | |
1913 | else | |
1914 | h++; | |
1915 | } | |
1916 | done: | |
1917 | cb->args[0] = h; | |
1918 | cb->args[1] = idx; | |
1919 | ||
1920 | return skb->len; | |
1921 | } | |
1922 | ||
1da177e4 LT |
1923 | #ifdef CONFIG_SYSCTL |
1924 | ||
c0ce9fb3 | 1925 | static void devinet_copy_dflt_conf(struct net *net, int i) |
31be3085 HX |
1926 | { |
1927 | struct net_device *dev; | |
1928 | ||
c6d14c84 ED |
1929 | rcu_read_lock(); |
1930 | for_each_netdev_rcu(net, dev) { | |
31be3085 | 1931 | struct in_device *in_dev; |
c6d14c84 | 1932 | |
31be3085 HX |
1933 | in_dev = __in_dev_get_rcu(dev); |
1934 | if (in_dev && !test_bit(i, in_dev->cnf.state)) | |
9355bbd6 | 1935 | in_dev->cnf.data[i] = net->ipv4.devconf_dflt->data[i]; |
31be3085 | 1936 | } |
c6d14c84 | 1937 | rcu_read_unlock(); |
31be3085 HX |
1938 | } |
1939 | ||
c6d14c84 | 1940 | /* called with RTNL locked */ |
c0ce9fb3 | 1941 | static void inet_forward_change(struct net *net) |
68dd299b PE |
1942 | { |
1943 | struct net_device *dev; | |
586f1211 | 1944 | int on = IPV4_DEVCONF_ALL(net, FORWARDING); |
68dd299b | 1945 | |
586f1211 | 1946 | IPV4_DEVCONF_ALL(net, ACCEPT_REDIRECTS) = !on; |
9355bbd6 | 1947 | IPV4_DEVCONF_DFLT(net, FORWARDING) = on; |
edc9e748 ND |
1948 | inet_netconf_notify_devconf(net, NETCONFA_FORWARDING, |
1949 | NETCONFA_IFINDEX_ALL, | |
1950 | net->ipv4.devconf_all); | |
1951 | inet_netconf_notify_devconf(net, NETCONFA_FORWARDING, | |
1952 | NETCONFA_IFINDEX_DEFAULT, | |
1953 | net->ipv4.devconf_dflt); | |
68dd299b | 1954 | |
c0ce9fb3 | 1955 | for_each_netdev(net, dev) { |
68dd299b | 1956 | struct in_device *in_dev; |
0187bdfb BH |
1957 | if (on) |
1958 | dev_disable_lro(dev); | |
68dd299b PE |
1959 | rcu_read_lock(); |
1960 | in_dev = __in_dev_get_rcu(dev); | |
edc9e748 | 1961 | if (in_dev) { |
68dd299b | 1962 | IN_DEV_CONF_SET(in_dev, FORWARDING, on); |
edc9e748 ND |
1963 | inet_netconf_notify_devconf(net, NETCONFA_FORWARDING, |
1964 | dev->ifindex, &in_dev->cnf); | |
1965 | } | |
68dd299b PE |
1966 | rcu_read_unlock(); |
1967 | } | |
68dd299b PE |
1968 | } |
1969 | ||
f085ff1c | 1970 | static int devinet_conf_ifindex(struct net *net, struct ipv4_devconf *cnf) |
1971 | { | |
1972 | if (cnf == net->ipv4.devconf_dflt) | |
1973 | return NETCONFA_IFINDEX_DEFAULT; | |
1974 | else if (cnf == net->ipv4.devconf_all) | |
1975 | return NETCONFA_IFINDEX_ALL; | |
1976 | else { | |
1977 | struct in_device *idev | |
1978 | = container_of(cnf, struct in_device, cnf); | |
1979 | return idev->dev->ifindex; | |
1980 | } | |
1981 | } | |
1982 | ||
fe2c6338 | 1983 | static int devinet_conf_proc(struct ctl_table *ctl, int write, |
8d65af78 | 1984 | void __user *buffer, |
31be3085 HX |
1985 | size_t *lenp, loff_t *ppos) |
1986 | { | |
d01ff0a0 | 1987 | int old_value = *(int *)ctl->data; |
8d65af78 | 1988 | int ret = proc_dointvec(ctl, write, buffer, lenp, ppos); |
d01ff0a0 | 1989 | int new_value = *(int *)ctl->data; |
31be3085 HX |
1990 | |
1991 | if (write) { | |
1992 | struct ipv4_devconf *cnf = ctl->extra1; | |
c0ce9fb3 | 1993 | struct net *net = ctl->extra2; |
31be3085 | 1994 | int i = (int *)ctl->data - cnf->data; |
f085ff1c | 1995 | int ifindex; |
31be3085 HX |
1996 | |
1997 | set_bit(i, cnf->state); | |
1998 | ||
9355bbd6 | 1999 | if (cnf == net->ipv4.devconf_dflt) |
c0ce9fb3 | 2000 | devinet_copy_dflt_conf(net, i); |
d0daebc3 TG |
2001 | if (i == IPV4_DEVCONF_ACCEPT_LOCAL - 1 || |
2002 | i == IPV4_DEVCONF_ROUTE_LOCALNET - 1) | |
d01ff0a0 | 2003 | if ((new_value == 0) && (old_value != 0)) |
4ccfe6d4 | 2004 | rt_cache_flush(net); |
f085ff1c | 2005 | |
cc535dfb ND |
2006 | if (i == IPV4_DEVCONF_RP_FILTER - 1 && |
2007 | new_value != old_value) { | |
f085ff1c | 2008 | ifindex = devinet_conf_ifindex(net, cnf); |
cc535dfb ND |
2009 | inet_netconf_notify_devconf(net, NETCONFA_RP_FILTER, |
2010 | ifindex, cnf); | |
2011 | } | |
f085ff1c | 2012 | if (i == IPV4_DEVCONF_PROXY_ARP - 1 && |
2013 | new_value != old_value) { | |
2014 | ifindex = devinet_conf_ifindex(net, cnf); | |
09aea5df | 2015 | inet_netconf_notify_devconf(net, NETCONFA_PROXY_NEIGH, |
f085ff1c | 2016 | ifindex, cnf); |
2017 | } | |
31be3085 HX |
2018 | } |
2019 | ||
2020 | return ret; | |
2021 | } | |
2022 | ||
fe2c6338 | 2023 | static int devinet_sysctl_forward(struct ctl_table *ctl, int write, |
8d65af78 | 2024 | void __user *buffer, |
1da177e4 LT |
2025 | size_t *lenp, loff_t *ppos) |
2026 | { | |
2027 | int *valp = ctl->data; | |
2028 | int val = *valp; | |
88af182e | 2029 | loff_t pos = *ppos; |
8d65af78 | 2030 | int ret = proc_dointvec(ctl, write, buffer, lenp, ppos); |
1da177e4 LT |
2031 | |
2032 | if (write && *valp != val) { | |
c0ce9fb3 PE |
2033 | struct net *net = ctl->extra2; |
2034 | ||
0187bdfb | 2035 | if (valp != &IPV4_DEVCONF_DFLT(net, FORWARDING)) { |
88af182e EB |
2036 | if (!rtnl_trylock()) { |
2037 | /* Restore the original values before restarting */ | |
2038 | *valp = val; | |
2039 | *ppos = pos; | |
9b8adb5e | 2040 | return restart_syscall(); |
88af182e | 2041 | } |
0187bdfb BH |
2042 | if (valp == &IPV4_DEVCONF_ALL(net, FORWARDING)) { |
2043 | inet_forward_change(net); | |
edc9e748 | 2044 | } else { |
0187bdfb BH |
2045 | struct ipv4_devconf *cnf = ctl->extra1; |
2046 | struct in_device *idev = | |
2047 | container_of(cnf, struct in_device, cnf); | |
edc9e748 ND |
2048 | if (*valp) |
2049 | dev_disable_lro(idev->dev); | |
2050 | inet_netconf_notify_devconf(net, | |
2051 | NETCONFA_FORWARDING, | |
2052 | idev->dev->ifindex, | |
2053 | cnf); | |
0187bdfb BH |
2054 | } |
2055 | rtnl_unlock(); | |
4ccfe6d4 | 2056 | rt_cache_flush(net); |
edc9e748 ND |
2057 | } else |
2058 | inet_netconf_notify_devconf(net, NETCONFA_FORWARDING, | |
2059 | NETCONFA_IFINDEX_DEFAULT, | |
2060 | net->ipv4.devconf_dflt); | |
1da177e4 LT |
2061 | } |
2062 | ||
2063 | return ret; | |
2064 | } | |
2065 | ||
fe2c6338 | 2066 | static int ipv4_doint_and_flush(struct ctl_table *ctl, int write, |
323e126f DM |
2067 | void __user *buffer, |
2068 | size_t *lenp, loff_t *ppos) | |
1da177e4 LT |
2069 | { |
2070 | int *valp = ctl->data; | |
2071 | int val = *valp; | |
8d65af78 | 2072 | int ret = proc_dointvec(ctl, write, buffer, lenp, ppos); |
76e6ebfb | 2073 | struct net *net = ctl->extra2; |
1da177e4 LT |
2074 | |
2075 | if (write && *valp != val) | |
4ccfe6d4 | 2076 | rt_cache_flush(net); |
1da177e4 LT |
2077 | |
2078 | return ret; | |
2079 | } | |
2080 | ||
f8572d8f | 2081 | #define DEVINET_SYSCTL_ENTRY(attr, name, mval, proc) \ |
42f811b8 | 2082 | { \ |
42f811b8 HX |
2083 | .procname = name, \ |
2084 | .data = ipv4_devconf.data + \ | |
02291680 | 2085 | IPV4_DEVCONF_ ## attr - 1, \ |
42f811b8 HX |
2086 | .maxlen = sizeof(int), \ |
2087 | .mode = mval, \ | |
2088 | .proc_handler = proc, \ | |
31be3085 | 2089 | .extra1 = &ipv4_devconf, \ |
42f811b8 HX |
2090 | } |
2091 | ||
2092 | #define DEVINET_SYSCTL_RW_ENTRY(attr, name) \ | |
f8572d8f | 2093 | DEVINET_SYSCTL_ENTRY(attr, name, 0644, devinet_conf_proc) |
42f811b8 HX |
2094 | |
2095 | #define DEVINET_SYSCTL_RO_ENTRY(attr, name) \ | |
f8572d8f | 2096 | DEVINET_SYSCTL_ENTRY(attr, name, 0444, devinet_conf_proc) |
42f811b8 | 2097 | |
f8572d8f EB |
2098 | #define DEVINET_SYSCTL_COMPLEX_ENTRY(attr, name, proc) \ |
2099 | DEVINET_SYSCTL_ENTRY(attr, name, 0644, proc) | |
42f811b8 HX |
2100 | |
2101 | #define DEVINET_SYSCTL_FLUSHING_ENTRY(attr, name) \ | |
f8572d8f | 2102 | DEVINET_SYSCTL_COMPLEX_ENTRY(attr, name, ipv4_doint_and_flush) |
42f811b8 | 2103 | |
1da177e4 LT |
2104 | static struct devinet_sysctl_table { |
2105 | struct ctl_table_header *sysctl_header; | |
02291680 | 2106 | struct ctl_table devinet_vars[__IPV4_DEVCONF_MAX]; |
1da177e4 LT |
2107 | } devinet_sysctl = { |
2108 | .devinet_vars = { | |
42f811b8 | 2109 | DEVINET_SYSCTL_COMPLEX_ENTRY(FORWARDING, "forwarding", |
f8572d8f | 2110 | devinet_sysctl_forward), |
42f811b8 HX |
2111 | DEVINET_SYSCTL_RO_ENTRY(MC_FORWARDING, "mc_forwarding"), |
2112 | ||
2113 | DEVINET_SYSCTL_RW_ENTRY(ACCEPT_REDIRECTS, "accept_redirects"), | |
2114 | DEVINET_SYSCTL_RW_ENTRY(SECURE_REDIRECTS, "secure_redirects"), | |
2115 | DEVINET_SYSCTL_RW_ENTRY(SHARED_MEDIA, "shared_media"), | |
2116 | DEVINET_SYSCTL_RW_ENTRY(RP_FILTER, "rp_filter"), | |
2117 | DEVINET_SYSCTL_RW_ENTRY(SEND_REDIRECTS, "send_redirects"), | |
2118 | DEVINET_SYSCTL_RW_ENTRY(ACCEPT_SOURCE_ROUTE, | |
2119 | "accept_source_route"), | |
8153a10c | 2120 | DEVINET_SYSCTL_RW_ENTRY(ACCEPT_LOCAL, "accept_local"), |
28f6aeea | 2121 | DEVINET_SYSCTL_RW_ENTRY(SRC_VMARK, "src_valid_mark"), |
42f811b8 HX |
2122 | DEVINET_SYSCTL_RW_ENTRY(PROXY_ARP, "proxy_arp"), |
2123 | DEVINET_SYSCTL_RW_ENTRY(MEDIUM_ID, "medium_id"), | |
2124 | DEVINET_SYSCTL_RW_ENTRY(BOOTP_RELAY, "bootp_relay"), | |
2125 | DEVINET_SYSCTL_RW_ENTRY(LOG_MARTIANS, "log_martians"), | |
2126 | DEVINET_SYSCTL_RW_ENTRY(TAG, "tag"), | |
2127 | DEVINET_SYSCTL_RW_ENTRY(ARPFILTER, "arp_filter"), | |
2128 | DEVINET_SYSCTL_RW_ENTRY(ARP_ANNOUNCE, "arp_announce"), | |
2129 | DEVINET_SYSCTL_RW_ENTRY(ARP_IGNORE, "arp_ignore"), | |
2130 | DEVINET_SYSCTL_RW_ENTRY(ARP_ACCEPT, "arp_accept"), | |
eefef1cf | 2131 | DEVINET_SYSCTL_RW_ENTRY(ARP_NOTIFY, "arp_notify"), |
65324144 | 2132 | DEVINET_SYSCTL_RW_ENTRY(PROXY_ARP_PVLAN, "proxy_arp_pvlan"), |
5c6fe01c WM |
2133 | DEVINET_SYSCTL_RW_ENTRY(FORCE_IGMP_VERSION, |
2134 | "force_igmp_version"), | |
2690048c WM |
2135 | DEVINET_SYSCTL_RW_ENTRY(IGMPV2_UNSOLICITED_REPORT_INTERVAL, |
2136 | "igmpv2_unsolicited_report_interval"), | |
2137 | DEVINET_SYSCTL_RW_ENTRY(IGMPV3_UNSOLICITED_REPORT_INTERVAL, | |
2138 | "igmpv3_unsolicited_report_interval"), | |
42f811b8 HX |
2139 | |
2140 | DEVINET_SYSCTL_FLUSHING_ENTRY(NOXFRM, "disable_xfrm"), | |
2141 | DEVINET_SYSCTL_FLUSHING_ENTRY(NOPOLICY, "disable_policy"), | |
42f811b8 HX |
2142 | DEVINET_SYSCTL_FLUSHING_ENTRY(PROMOTE_SECONDARIES, |
2143 | "promote_secondaries"), | |
d0daebc3 TG |
2144 | DEVINET_SYSCTL_FLUSHING_ENTRY(ROUTE_LOCALNET, |
2145 | "route_localnet"), | |
1da177e4 | 2146 | }, |
1da177e4 LT |
2147 | }; |
2148 | ||
ea40b324 | 2149 | static int __devinet_sysctl_register(struct net *net, char *dev_name, |
f8572d8f | 2150 | struct ipv4_devconf *p) |
1da177e4 LT |
2151 | { |
2152 | int i; | |
9fa89642 | 2153 | struct devinet_sysctl_table *t; |
8607ddb8 | 2154 | char path[sizeof("net/ipv4/conf/") + IFNAMSIZ]; |
bfada697 | 2155 | |
9fa89642 | 2156 | t = kmemdup(&devinet_sysctl, sizeof(*t), GFP_KERNEL); |
1da177e4 | 2157 | if (!t) |
9fa89642 PE |
2158 | goto out; |
2159 | ||
1da177e4 LT |
2160 | for (i = 0; i < ARRAY_SIZE(t->devinet_vars) - 1; i++) { |
2161 | t->devinet_vars[i].data += (char *)p - (char *)&ipv4_devconf; | |
31be3085 | 2162 | t->devinet_vars[i].extra1 = p; |
c0ce9fb3 | 2163 | t->devinet_vars[i].extra2 = net; |
1da177e4 LT |
2164 | } |
2165 | ||
8607ddb8 | 2166 | snprintf(path, sizeof(path), "net/ipv4/conf/%s", dev_name); |
1da177e4 | 2167 | |
8607ddb8 | 2168 | t->sysctl_header = register_net_sysctl(net, path, t->devinet_vars); |
1da177e4 | 2169 | if (!t->sysctl_header) |
8607ddb8 | 2170 | goto free; |
1da177e4 LT |
2171 | |
2172 | p->sysctl = t; | |
ea40b324 | 2173 | return 0; |
1da177e4 | 2174 | |
9fa89642 | 2175 | free: |
1da177e4 | 2176 | kfree(t); |
9fa89642 | 2177 | out: |
ea40b324 | 2178 | return -ENOBUFS; |
1da177e4 LT |
2179 | } |
2180 | ||
51602b2a PE |
2181 | static void __devinet_sysctl_unregister(struct ipv4_devconf *cnf) |
2182 | { | |
2183 | struct devinet_sysctl_table *t = cnf->sysctl; | |
2184 | ||
2185 | if (t == NULL) | |
2186 | return; | |
2187 | ||
2188 | cnf->sysctl = NULL; | |
ff538818 | 2189 | unregister_net_sysctl_table(t->sysctl_header); |
51602b2a PE |
2190 | kfree(t); |
2191 | } | |
2192 | ||
20e61da7 | 2193 | static int devinet_sysctl_register(struct in_device *idev) |
66f27a52 | 2194 | { |
20e61da7 WC |
2195 | int err; |
2196 | ||
2197 | if (!sysctl_dev_name_is_allowed(idev->dev->name)) | |
2198 | return -EINVAL; | |
2199 | ||
2200 | err = neigh_sysctl_register(idev->dev, idev->arp_parms, NULL); | |
2201 | if (err) | |
2202 | return err; | |
2203 | err = __devinet_sysctl_register(dev_net(idev->dev), idev->dev->name, | |
f8572d8f | 2204 | &idev->cnf); |
20e61da7 WC |
2205 | if (err) |
2206 | neigh_sysctl_unregister(idev->arp_parms); | |
2207 | return err; | |
66f27a52 PE |
2208 | } |
2209 | ||
51602b2a | 2210 | static void devinet_sysctl_unregister(struct in_device *idev) |
1da177e4 | 2211 | { |
51602b2a PE |
2212 | __devinet_sysctl_unregister(&idev->cnf); |
2213 | neigh_sysctl_unregister(idev->arp_parms); | |
1da177e4 | 2214 | } |
1da177e4 | 2215 | |
68dd299b PE |
2216 | static struct ctl_table ctl_forward_entry[] = { |
2217 | { | |
68dd299b PE |
2218 | .procname = "ip_forward", |
2219 | .data = &ipv4_devconf.data[ | |
02291680 | 2220 | IPV4_DEVCONF_FORWARDING - 1], |
68dd299b PE |
2221 | .maxlen = sizeof(int), |
2222 | .mode = 0644, | |
2223 | .proc_handler = devinet_sysctl_forward, | |
68dd299b | 2224 | .extra1 = &ipv4_devconf, |
c0ce9fb3 | 2225 | .extra2 = &init_net, |
68dd299b PE |
2226 | }, |
2227 | { }, | |
2228 | }; | |
2a75de0c | 2229 | #endif |
68dd299b | 2230 | |
752d14dc PE |
2231 | static __net_init int devinet_init_net(struct net *net) |
2232 | { | |
2233 | int err; | |
752d14dc | 2234 | struct ipv4_devconf *all, *dflt; |
2a75de0c ED |
2235 | #ifdef CONFIG_SYSCTL |
2236 | struct ctl_table *tbl = ctl_forward_entry; | |
752d14dc | 2237 | struct ctl_table_header *forw_hdr; |
2a75de0c | 2238 | #endif |
752d14dc PE |
2239 | |
2240 | err = -ENOMEM; | |
2241 | all = &ipv4_devconf; | |
2242 | dflt = &ipv4_devconf_dflt; | |
752d14dc | 2243 | |
09ad9bc7 | 2244 | if (!net_eq(net, &init_net)) { |
752d14dc PE |
2245 | all = kmemdup(all, sizeof(ipv4_devconf), GFP_KERNEL); |
2246 | if (all == NULL) | |
2247 | goto err_alloc_all; | |
2248 | ||
2249 | dflt = kmemdup(dflt, sizeof(ipv4_devconf_dflt), GFP_KERNEL); | |
2250 | if (dflt == NULL) | |
2251 | goto err_alloc_dflt; | |
2252 | ||
2a75de0c | 2253 | #ifdef CONFIG_SYSCTL |
752d14dc PE |
2254 | tbl = kmemdup(tbl, sizeof(ctl_forward_entry), GFP_KERNEL); |
2255 | if (tbl == NULL) | |
2256 | goto err_alloc_ctl; | |
2257 | ||
02291680 | 2258 | tbl[0].data = &all->data[IPV4_DEVCONF_FORWARDING - 1]; |
752d14dc PE |
2259 | tbl[0].extra1 = all; |
2260 | tbl[0].extra2 = net; | |
2a75de0c | 2261 | #endif |
752d14dc PE |
2262 | } |
2263 | ||
2264 | #ifdef CONFIG_SYSCTL | |
f8572d8f | 2265 | err = __devinet_sysctl_register(net, "all", all); |
752d14dc PE |
2266 | if (err < 0) |
2267 | goto err_reg_all; | |
2268 | ||
f8572d8f | 2269 | err = __devinet_sysctl_register(net, "default", dflt); |
752d14dc PE |
2270 | if (err < 0) |
2271 | goto err_reg_dflt; | |
2272 | ||
2273 | err = -ENOMEM; | |
8607ddb8 | 2274 | forw_hdr = register_net_sysctl(net, "net/ipv4", tbl); |
752d14dc PE |
2275 | if (forw_hdr == NULL) |
2276 | goto err_reg_ctl; | |
2a75de0c | 2277 | net->ipv4.forw_hdr = forw_hdr; |
752d14dc PE |
2278 | #endif |
2279 | ||
752d14dc PE |
2280 | net->ipv4.devconf_all = all; |
2281 | net->ipv4.devconf_dflt = dflt; | |
2282 | return 0; | |
2283 | ||
2284 | #ifdef CONFIG_SYSCTL | |
2285 | err_reg_ctl: | |
2286 | __devinet_sysctl_unregister(dflt); | |
2287 | err_reg_dflt: | |
2288 | __devinet_sysctl_unregister(all); | |
2289 | err_reg_all: | |
2290 | if (tbl != ctl_forward_entry) | |
2291 | kfree(tbl); | |
752d14dc | 2292 | err_alloc_ctl: |
2a75de0c | 2293 | #endif |
752d14dc PE |
2294 | if (dflt != &ipv4_devconf_dflt) |
2295 | kfree(dflt); | |
2296 | err_alloc_dflt: | |
2297 | if (all != &ipv4_devconf) | |
2298 | kfree(all); | |
2299 | err_alloc_all: | |
2300 | return err; | |
2301 | } | |
2302 | ||
2303 | static __net_exit void devinet_exit_net(struct net *net) | |
2304 | { | |
2a75de0c | 2305 | #ifdef CONFIG_SYSCTL |
752d14dc PE |
2306 | struct ctl_table *tbl; |
2307 | ||
2308 | tbl = net->ipv4.forw_hdr->ctl_table_arg; | |
752d14dc PE |
2309 | unregister_net_sysctl_table(net->ipv4.forw_hdr); |
2310 | __devinet_sysctl_unregister(net->ipv4.devconf_dflt); | |
2311 | __devinet_sysctl_unregister(net->ipv4.devconf_all); | |
752d14dc | 2312 | kfree(tbl); |
2a75de0c | 2313 | #endif |
752d14dc PE |
2314 | kfree(net->ipv4.devconf_dflt); |
2315 | kfree(net->ipv4.devconf_all); | |
2316 | } | |
2317 | ||
2318 | static __net_initdata struct pernet_operations devinet_ops = { | |
2319 | .init = devinet_init_net, | |
2320 | .exit = devinet_exit_net, | |
2321 | }; | |
2322 | ||
9f0f7272 TG |
2323 | static struct rtnl_af_ops inet_af_ops = { |
2324 | .family = AF_INET, | |
2325 | .fill_link_af = inet_fill_link_af, | |
2326 | .get_link_af_size = inet_get_link_af_size, | |
cf7afbfe TG |
2327 | .validate_link_af = inet_validate_link_af, |
2328 | .set_link_af = inet_set_link_af, | |
9f0f7272 TG |
2329 | }; |
2330 | ||
1da177e4 LT |
2331 | void __init devinet_init(void) |
2332 | { | |
fd23c3b3 DM |
2333 | int i; |
2334 | ||
2335 | for (i = 0; i < IN4_ADDR_HSIZE; i++) | |
2336 | INIT_HLIST_HEAD(&inet_addr_lst[i]); | |
2337 | ||
752d14dc PE |
2338 | register_pernet_subsys(&devinet_ops); |
2339 | ||
1da177e4 LT |
2340 | register_gifconf(PF_INET, inet_gifconf); |
2341 | register_netdevice_notifier(&ip_netdev_notifier); | |
63f3444f | 2342 | |
906e073f | 2343 | queue_delayed_work(system_power_efficient_wq, &check_lifetime_work, 0); |
5c766d64 | 2344 | |
9f0f7272 TG |
2345 | rtnl_af_register(&inet_af_ops); |
2346 | ||
c7ac8679 GR |
2347 | rtnl_register(PF_INET, RTM_NEWADDR, inet_rtm_newaddr, NULL, NULL); |
2348 | rtnl_register(PF_INET, RTM_DELADDR, inet_rtm_deladdr, NULL, NULL); | |
2349 | rtnl_register(PF_INET, RTM_GETADDR, NULL, inet_dump_ifaddr, NULL); | |
9e551110 | 2350 | rtnl_register(PF_INET, RTM_GETNETCONF, inet_netconf_get_devconf, |
7a674200 | 2351 | inet_netconf_dump_devconf, NULL); |
1da177e4 LT |
2352 | } |
2353 |