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 | ||
93a714d6 MC |
551 | static int ip_mc_config(struct sock *sk, bool join, const struct in_ifaddr *ifa) |
552 | { | |
553 | struct ip_mreqn mreq = { | |
554 | .imr_multiaddr.s_addr = ifa->ifa_address, | |
555 | .imr_ifindex = ifa->ifa_dev->dev->ifindex, | |
556 | }; | |
557 | int ret; | |
558 | ||
559 | ASSERT_RTNL(); | |
560 | ||
561 | lock_sock(sk); | |
562 | if (join) | |
563 | ret = __ip_mc_join_group(sk, &mreq); | |
564 | else | |
565 | ret = __ip_mc_leave_group(sk, &mreq); | |
566 | release_sock(sk); | |
567 | ||
568 | return ret; | |
569 | } | |
570 | ||
661d2967 | 571 | static int inet_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 572 | { |
3b1e0a65 | 573 | struct net *net = sock_net(skb->sk); |
dfdd5fd4 | 574 | struct nlattr *tb[IFA_MAX+1]; |
1da177e4 | 575 | struct in_device *in_dev; |
dfdd5fd4 | 576 | struct ifaddrmsg *ifm; |
1da177e4 | 577 | struct in_ifaddr *ifa, **ifap; |
dfdd5fd4 | 578 | int err = -EINVAL; |
1da177e4 LT |
579 | |
580 | ASSERT_RTNL(); | |
581 | ||
dfdd5fd4 TG |
582 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv4_policy); |
583 | if (err < 0) | |
584 | goto errout; | |
585 | ||
586 | ifm = nlmsg_data(nlh); | |
7fee0ca2 | 587 | in_dev = inetdev_by_index(net, ifm->ifa_index); |
dfdd5fd4 TG |
588 | if (in_dev == NULL) { |
589 | err = -ENODEV; | |
590 | goto errout; | |
591 | } | |
592 | ||
1da177e4 LT |
593 | for (ifap = &in_dev->ifa_list; (ifa = *ifap) != NULL; |
594 | ifap = &ifa->ifa_next) { | |
dfdd5fd4 | 595 | if (tb[IFA_LOCAL] && |
a7a628c4 | 596 | ifa->ifa_local != nla_get_be32(tb[IFA_LOCAL])) |
dfdd5fd4 TG |
597 | continue; |
598 | ||
599 | if (tb[IFA_LABEL] && nla_strcmp(tb[IFA_LABEL], ifa->ifa_label)) | |
1da177e4 | 600 | continue; |
dfdd5fd4 TG |
601 | |
602 | if (tb[IFA_ADDRESS] && | |
603 | (ifm->ifa_prefixlen != ifa->ifa_prefixlen || | |
a7a628c4 | 604 | !inet_ifa_match(nla_get_be32(tb[IFA_ADDRESS]), ifa))) |
dfdd5fd4 TG |
605 | continue; |
606 | ||
93a714d6 MC |
607 | if (ipv4_is_multicast(ifa->ifa_address)) |
608 | ip_mc_config(net->ipv4.mc_autojoin_sk, false, ifa); | |
15e47304 | 609 | __inet_del_ifa(in_dev, ifap, 1, nlh, NETLINK_CB(skb).portid); |
1da177e4 LT |
610 | return 0; |
611 | } | |
dfdd5fd4 TG |
612 | |
613 | err = -EADDRNOTAVAIL; | |
614 | errout: | |
615 | return err; | |
1da177e4 LT |
616 | } |
617 | ||
5c766d64 JP |
618 | #define INFINITY_LIFE_TIME 0xFFFFFFFF |
619 | ||
620 | static void check_lifetime(struct work_struct *work) | |
621 | { | |
622 | unsigned long now, next, next_sec, next_sched; | |
623 | struct in_ifaddr *ifa; | |
c988d1e8 | 624 | struct hlist_node *n; |
5c766d64 JP |
625 | int i; |
626 | ||
627 | now = jiffies; | |
628 | next = round_jiffies_up(now + ADDR_CHECK_FREQUENCY); | |
629 | ||
5c766d64 | 630 | for (i = 0; i < IN4_ADDR_HSIZE; i++) { |
c988d1e8 JP |
631 | bool change_needed = false; |
632 | ||
633 | rcu_read_lock(); | |
b67bfe0d | 634 | hlist_for_each_entry_rcu(ifa, &inet_addr_lst[i], hash) { |
5c766d64 JP |
635 | unsigned long age; |
636 | ||
637 | if (ifa->ifa_flags & IFA_F_PERMANENT) | |
638 | continue; | |
639 | ||
640 | /* We try to batch several events at once. */ | |
641 | age = (now - ifa->ifa_tstamp + | |
642 | ADDRCONF_TIMER_FUZZ_MINUS) / HZ; | |
643 | ||
644 | if (ifa->ifa_valid_lft != INFINITY_LIFE_TIME && | |
645 | age >= ifa->ifa_valid_lft) { | |
c988d1e8 | 646 | change_needed = true; |
5c766d64 JP |
647 | } else if (ifa->ifa_preferred_lft == |
648 | INFINITY_LIFE_TIME) { | |
649 | continue; | |
650 | } else if (age >= ifa->ifa_preferred_lft) { | |
651 | if (time_before(ifa->ifa_tstamp + | |
652 | ifa->ifa_valid_lft * HZ, next)) | |
653 | next = ifa->ifa_tstamp + | |
654 | ifa->ifa_valid_lft * HZ; | |
655 | ||
c988d1e8 JP |
656 | if (!(ifa->ifa_flags & IFA_F_DEPRECATED)) |
657 | change_needed = true; | |
5c766d64 JP |
658 | } else if (time_before(ifa->ifa_tstamp + |
659 | ifa->ifa_preferred_lft * HZ, | |
660 | next)) { | |
661 | next = ifa->ifa_tstamp + | |
662 | ifa->ifa_preferred_lft * HZ; | |
663 | } | |
664 | } | |
c988d1e8 JP |
665 | rcu_read_unlock(); |
666 | if (!change_needed) | |
667 | continue; | |
668 | rtnl_lock(); | |
669 | hlist_for_each_entry_safe(ifa, n, &inet_addr_lst[i], hash) { | |
670 | unsigned long age; | |
671 | ||
672 | if (ifa->ifa_flags & IFA_F_PERMANENT) | |
673 | continue; | |
674 | ||
675 | /* We try to batch several events at once. */ | |
676 | age = (now - ifa->ifa_tstamp + | |
677 | ADDRCONF_TIMER_FUZZ_MINUS) / HZ; | |
678 | ||
679 | if (ifa->ifa_valid_lft != INFINITY_LIFE_TIME && | |
680 | age >= ifa->ifa_valid_lft) { | |
681 | struct in_ifaddr **ifap; | |
682 | ||
683 | for (ifap = &ifa->ifa_dev->ifa_list; | |
684 | *ifap != NULL; ifap = &(*ifap)->ifa_next) { | |
685 | if (*ifap == ifa) { | |
686 | inet_del_ifa(ifa->ifa_dev, | |
687 | ifap, 1); | |
688 | break; | |
689 | } | |
690 | } | |
691 | } else if (ifa->ifa_preferred_lft != | |
692 | INFINITY_LIFE_TIME && | |
693 | age >= ifa->ifa_preferred_lft && | |
694 | !(ifa->ifa_flags & IFA_F_DEPRECATED)) { | |
695 | ifa->ifa_flags |= IFA_F_DEPRECATED; | |
696 | rtmsg_ifa(RTM_NEWADDR, ifa, NULL, 0); | |
697 | } | |
698 | } | |
699 | rtnl_unlock(); | |
5c766d64 | 700 | } |
5c766d64 JP |
701 | |
702 | next_sec = round_jiffies_up(next); | |
703 | next_sched = next; | |
704 | ||
705 | /* If rounded timeout is accurate enough, accept it. */ | |
706 | if (time_before(next_sec, next + ADDRCONF_TIMER_FUZZ)) | |
707 | next_sched = next_sec; | |
708 | ||
709 | now = jiffies; | |
710 | /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */ | |
711 | if (time_before(next_sched, now + ADDRCONF_TIMER_FUZZ_MAX)) | |
712 | next_sched = now + ADDRCONF_TIMER_FUZZ_MAX; | |
713 | ||
906e073f | 714 | queue_delayed_work(system_power_efficient_wq, &check_lifetime_work, |
715 | next_sched - now); | |
5c766d64 JP |
716 | } |
717 | ||
718 | static void set_ifa_lifetime(struct in_ifaddr *ifa, __u32 valid_lft, | |
719 | __u32 prefered_lft) | |
720 | { | |
721 | unsigned long timeout; | |
722 | ||
723 | ifa->ifa_flags &= ~(IFA_F_PERMANENT | IFA_F_DEPRECATED); | |
724 | ||
725 | timeout = addrconf_timeout_fixup(valid_lft, HZ); | |
726 | if (addrconf_finite_timeout(timeout)) | |
727 | ifa->ifa_valid_lft = timeout; | |
728 | else | |
729 | ifa->ifa_flags |= IFA_F_PERMANENT; | |
730 | ||
731 | timeout = addrconf_timeout_fixup(prefered_lft, HZ); | |
732 | if (addrconf_finite_timeout(timeout)) { | |
733 | if (timeout == 0) | |
734 | ifa->ifa_flags |= IFA_F_DEPRECATED; | |
735 | ifa->ifa_preferred_lft = timeout; | |
736 | } | |
737 | ifa->ifa_tstamp = jiffies; | |
738 | if (!ifa->ifa_cstamp) | |
739 | ifa->ifa_cstamp = ifa->ifa_tstamp; | |
740 | } | |
741 | ||
742 | static struct in_ifaddr *rtm_to_ifaddr(struct net *net, struct nlmsghdr *nlh, | |
743 | __u32 *pvalid_lft, __u32 *pprefered_lft) | |
1da177e4 | 744 | { |
5c753978 TG |
745 | struct nlattr *tb[IFA_MAX+1]; |
746 | struct in_ifaddr *ifa; | |
747 | struct ifaddrmsg *ifm; | |
1da177e4 LT |
748 | struct net_device *dev; |
749 | struct in_device *in_dev; | |
7b218574 | 750 | int err; |
1da177e4 | 751 | |
5c753978 TG |
752 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv4_policy); |
753 | if (err < 0) | |
754 | goto errout; | |
1da177e4 | 755 | |
5c753978 | 756 | ifm = nlmsg_data(nlh); |
7b218574 DL |
757 | err = -EINVAL; |
758 | if (ifm->ifa_prefixlen > 32 || tb[IFA_LOCAL] == NULL) | |
5c753978 | 759 | goto errout; |
1da177e4 | 760 | |
4b8aa9ab | 761 | dev = __dev_get_by_index(net, ifm->ifa_index); |
7b218574 DL |
762 | err = -ENODEV; |
763 | if (dev == NULL) | |
5c753978 | 764 | goto errout; |
1da177e4 | 765 | |
5c753978 | 766 | in_dev = __in_dev_get_rtnl(dev); |
7b218574 DL |
767 | err = -ENOBUFS; |
768 | if (in_dev == NULL) | |
71e27da9 | 769 | goto errout; |
1da177e4 | 770 | |
5c753978 | 771 | ifa = inet_alloc_ifa(); |
7b218574 | 772 | if (ifa == NULL) |
5c753978 TG |
773 | /* |
774 | * A potential indev allocation can be left alive, it stays | |
775 | * assigned to its device and is destroy with it. | |
776 | */ | |
5c753978 | 777 | goto errout; |
5c753978 | 778 | |
a4e65d36 | 779 | ipv4_devconf_setall(in_dev); |
1d4c8c29 | 780 | neigh_parms_data_state_setall(in_dev->arp_parms); |
5c753978 TG |
781 | in_dev_hold(in_dev); |
782 | ||
783 | if (tb[IFA_ADDRESS] == NULL) | |
784 | tb[IFA_ADDRESS] = tb[IFA_LOCAL]; | |
1da177e4 | 785 | |
fd23c3b3 | 786 | INIT_HLIST_NODE(&ifa->hash); |
1da177e4 LT |
787 | ifa->ifa_prefixlen = ifm->ifa_prefixlen; |
788 | ifa->ifa_mask = inet_make_mask(ifm->ifa_prefixlen); | |
ad6c8135 JP |
789 | ifa->ifa_flags = tb[IFA_FLAGS] ? nla_get_u32(tb[IFA_FLAGS]) : |
790 | ifm->ifa_flags; | |
1da177e4 | 791 | ifa->ifa_scope = ifm->ifa_scope; |
5c753978 TG |
792 | ifa->ifa_dev = in_dev; |
793 | ||
a7a628c4 AV |
794 | ifa->ifa_local = nla_get_be32(tb[IFA_LOCAL]); |
795 | ifa->ifa_address = nla_get_be32(tb[IFA_ADDRESS]); | |
5c753978 TG |
796 | |
797 | if (tb[IFA_BROADCAST]) | |
a7a628c4 | 798 | ifa->ifa_broadcast = nla_get_be32(tb[IFA_BROADCAST]); |
5c753978 | 799 | |
5c753978 TG |
800 | if (tb[IFA_LABEL]) |
801 | nla_strlcpy(ifa->ifa_label, tb[IFA_LABEL], IFNAMSIZ); | |
1da177e4 LT |
802 | else |
803 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); | |
804 | ||
5c766d64 JP |
805 | if (tb[IFA_CACHEINFO]) { |
806 | struct ifa_cacheinfo *ci; | |
807 | ||
808 | ci = nla_data(tb[IFA_CACHEINFO]); | |
809 | if (!ci->ifa_valid || ci->ifa_prefered > ci->ifa_valid) { | |
810 | err = -EINVAL; | |
446266b0 | 811 | goto errout_free; |
5c766d64 JP |
812 | } |
813 | *pvalid_lft = ci->ifa_valid; | |
814 | *pprefered_lft = ci->ifa_prefered; | |
815 | } | |
816 | ||
5c753978 TG |
817 | return ifa; |
818 | ||
446266b0 DB |
819 | errout_free: |
820 | inet_free_ifa(ifa); | |
5c753978 TG |
821 | errout: |
822 | return ERR_PTR(err); | |
823 | } | |
824 | ||
5c766d64 JP |
825 | static struct in_ifaddr *find_matching_ifa(struct in_ifaddr *ifa) |
826 | { | |
827 | struct in_device *in_dev = ifa->ifa_dev; | |
828 | struct in_ifaddr *ifa1, **ifap; | |
829 | ||
830 | if (!ifa->ifa_local) | |
831 | return NULL; | |
832 | ||
833 | for (ifap = &in_dev->ifa_list; (ifa1 = *ifap) != NULL; | |
834 | ifap = &ifa1->ifa_next) { | |
835 | if (ifa1->ifa_mask == ifa->ifa_mask && | |
836 | inet_ifa_match(ifa1->ifa_address, ifa) && | |
837 | ifa1->ifa_local == ifa->ifa_local) | |
838 | return ifa1; | |
839 | } | |
840 | return NULL; | |
841 | } | |
842 | ||
661d2967 | 843 | static int inet_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh) |
5c753978 | 844 | { |
3b1e0a65 | 845 | struct net *net = sock_net(skb->sk); |
5c753978 | 846 | struct in_ifaddr *ifa; |
5c766d64 JP |
847 | struct in_ifaddr *ifa_existing; |
848 | __u32 valid_lft = INFINITY_LIFE_TIME; | |
849 | __u32 prefered_lft = INFINITY_LIFE_TIME; | |
5c753978 TG |
850 | |
851 | ASSERT_RTNL(); | |
852 | ||
5c766d64 | 853 | ifa = rtm_to_ifaddr(net, nlh, &valid_lft, &prefered_lft); |
5c753978 TG |
854 | if (IS_ERR(ifa)) |
855 | return PTR_ERR(ifa); | |
856 | ||
5c766d64 JP |
857 | ifa_existing = find_matching_ifa(ifa); |
858 | if (!ifa_existing) { | |
859 | /* It would be best to check for !NLM_F_CREATE here but | |
614d056c | 860 | * userspace already relies on not having to provide this. |
5c766d64 JP |
861 | */ |
862 | set_ifa_lifetime(ifa, valid_lft, prefered_lft); | |
93a714d6 MC |
863 | if (ifa->ifa_flags & IFA_F_MCAUTOJOIN) { |
864 | int ret = ip_mc_config(net->ipv4.mc_autojoin_sk, | |
865 | true, ifa); | |
866 | ||
867 | if (ret < 0) { | |
868 | inet_free_ifa(ifa); | |
869 | return ret; | |
870 | } | |
871 | } | |
5c766d64 JP |
872 | return __inet_insert_ifa(ifa, nlh, NETLINK_CB(skb).portid); |
873 | } else { | |
874 | inet_free_ifa(ifa); | |
875 | ||
876 | if (nlh->nlmsg_flags & NLM_F_EXCL || | |
877 | !(nlh->nlmsg_flags & NLM_F_REPLACE)) | |
878 | return -EEXIST; | |
34e2ed34 JP |
879 | ifa = ifa_existing; |
880 | set_ifa_lifetime(ifa, valid_lft, prefered_lft); | |
05a324b9 | 881 | cancel_delayed_work(&check_lifetime_work); |
906e073f | 882 | queue_delayed_work(system_power_efficient_wq, |
883 | &check_lifetime_work, 0); | |
34e2ed34 JP |
884 | rtmsg_ifa(RTM_NEWADDR, ifa, nlh, NETLINK_CB(skb).portid); |
885 | blocking_notifier_call_chain(&inetaddr_chain, NETDEV_UP, ifa); | |
5c766d64 JP |
886 | } |
887 | return 0; | |
1da177e4 LT |
888 | } |
889 | ||
890 | /* | |
891 | * Determine a default network mask, based on the IP address. | |
892 | */ | |
893 | ||
40384999 | 894 | static int inet_abc_len(__be32 addr) |
1da177e4 LT |
895 | { |
896 | int rc = -1; /* Something else, probably a multicast. */ | |
897 | ||
f97c1e0c | 898 | if (ipv4_is_zeronet(addr)) |
e905a9ed | 899 | rc = 0; |
1da177e4 | 900 | else { |
714e85be | 901 | __u32 haddr = ntohl(addr); |
1da177e4 | 902 | |
714e85be | 903 | if (IN_CLASSA(haddr)) |
1da177e4 | 904 | rc = 8; |
714e85be | 905 | else if (IN_CLASSB(haddr)) |
1da177e4 | 906 | rc = 16; |
714e85be | 907 | else if (IN_CLASSC(haddr)) |
1da177e4 LT |
908 | rc = 24; |
909 | } | |
910 | ||
e905a9ed | 911 | return rc; |
1da177e4 LT |
912 | } |
913 | ||
914 | ||
e5b13cb1 | 915 | int devinet_ioctl(struct net *net, unsigned int cmd, void __user *arg) |
1da177e4 LT |
916 | { |
917 | struct ifreq ifr; | |
918 | struct sockaddr_in sin_orig; | |
919 | struct sockaddr_in *sin = (struct sockaddr_in *)&ifr.ifr_addr; | |
920 | struct in_device *in_dev; | |
921 | struct in_ifaddr **ifap = NULL; | |
922 | struct in_ifaddr *ifa = NULL; | |
923 | struct net_device *dev; | |
924 | char *colon; | |
925 | int ret = -EFAULT; | |
926 | int tryaddrmatch = 0; | |
927 | ||
928 | /* | |
929 | * Fetch the caller's info block into kernel space | |
930 | */ | |
931 | ||
932 | if (copy_from_user(&ifr, arg, sizeof(struct ifreq))) | |
933 | goto out; | |
934 | ifr.ifr_name[IFNAMSIZ - 1] = 0; | |
935 | ||
936 | /* save original address for comparison */ | |
937 | memcpy(&sin_orig, sin, sizeof(*sin)); | |
938 | ||
939 | colon = strchr(ifr.ifr_name, ':'); | |
940 | if (colon) | |
941 | *colon = 0; | |
942 | ||
e5b13cb1 | 943 | dev_load(net, ifr.ifr_name); |
1da177e4 | 944 | |
132adf54 | 945 | switch (cmd) { |
1da177e4 LT |
946 | case SIOCGIFADDR: /* Get interface address */ |
947 | case SIOCGIFBRDADDR: /* Get the broadcast address */ | |
948 | case SIOCGIFDSTADDR: /* Get the destination address */ | |
949 | case SIOCGIFNETMASK: /* Get the netmask for the interface */ | |
950 | /* Note that these ioctls will not sleep, | |
951 | so that we do not impose a lock. | |
952 | One day we will be forced to put shlock here (I mean SMP) | |
953 | */ | |
954 | tryaddrmatch = (sin_orig.sin_family == AF_INET); | |
955 | memset(sin, 0, sizeof(*sin)); | |
956 | sin->sin_family = AF_INET; | |
957 | break; | |
958 | ||
959 | case SIOCSIFFLAGS: | |
bf5b30b8 | 960 | ret = -EPERM; |
52e804c6 | 961 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 LT |
962 | goto out; |
963 | break; | |
964 | case SIOCSIFADDR: /* Set interface address (and family) */ | |
965 | case SIOCSIFBRDADDR: /* Set the broadcast address */ | |
966 | case SIOCSIFDSTADDR: /* Set the destination address */ | |
967 | case SIOCSIFNETMASK: /* Set the netmask for the interface */ | |
bf5b30b8 | 968 | ret = -EPERM; |
52e804c6 | 969 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 LT |
970 | goto out; |
971 | ret = -EINVAL; | |
972 | if (sin->sin_family != AF_INET) | |
973 | goto out; | |
974 | break; | |
975 | default: | |
976 | ret = -EINVAL; | |
977 | goto out; | |
978 | } | |
979 | ||
980 | rtnl_lock(); | |
981 | ||
982 | ret = -ENODEV; | |
9f9354b9 ED |
983 | dev = __dev_get_by_name(net, ifr.ifr_name); |
984 | if (!dev) | |
1da177e4 LT |
985 | goto done; |
986 | ||
987 | if (colon) | |
988 | *colon = ':'; | |
989 | ||
9f9354b9 ED |
990 | in_dev = __in_dev_get_rtnl(dev); |
991 | if (in_dev) { | |
1da177e4 LT |
992 | if (tryaddrmatch) { |
993 | /* Matthias Andree */ | |
994 | /* compare label and address (4.4BSD style) */ | |
995 | /* note: we only do this for a limited set of ioctls | |
996 | and only if the original address family was AF_INET. | |
997 | This is checked above. */ | |
998 | for (ifap = &in_dev->ifa_list; (ifa = *ifap) != NULL; | |
999 | ifap = &ifa->ifa_next) { | |
1000 | if (!strcmp(ifr.ifr_name, ifa->ifa_label) && | |
1001 | sin_orig.sin_addr.s_addr == | |
6c91afe1 | 1002 | ifa->ifa_local) { |
1da177e4 LT |
1003 | break; /* found */ |
1004 | } | |
1005 | } | |
1006 | } | |
1007 | /* we didn't get a match, maybe the application is | |
1008 | 4.3BSD-style and passed in junk so we fall back to | |
1009 | comparing just the label */ | |
1010 | if (!ifa) { | |
1011 | for (ifap = &in_dev->ifa_list; (ifa = *ifap) != NULL; | |
1012 | ifap = &ifa->ifa_next) | |
1013 | if (!strcmp(ifr.ifr_name, ifa->ifa_label)) | |
1014 | break; | |
1015 | } | |
1016 | } | |
1017 | ||
1018 | ret = -EADDRNOTAVAIL; | |
1019 | if (!ifa && cmd != SIOCSIFADDR && cmd != SIOCSIFFLAGS) | |
1020 | goto done; | |
1021 | ||
132adf54 | 1022 | switch (cmd) { |
1da177e4 LT |
1023 | case SIOCGIFADDR: /* Get interface address */ |
1024 | sin->sin_addr.s_addr = ifa->ifa_local; | |
1025 | goto rarok; | |
1026 | ||
1027 | case SIOCGIFBRDADDR: /* Get the broadcast address */ | |
1028 | sin->sin_addr.s_addr = ifa->ifa_broadcast; | |
1029 | goto rarok; | |
1030 | ||
1031 | case SIOCGIFDSTADDR: /* Get the destination address */ | |
1032 | sin->sin_addr.s_addr = ifa->ifa_address; | |
1033 | goto rarok; | |
1034 | ||
1035 | case SIOCGIFNETMASK: /* Get the netmask for the interface */ | |
1036 | sin->sin_addr.s_addr = ifa->ifa_mask; | |
1037 | goto rarok; | |
1038 | ||
1039 | case SIOCSIFFLAGS: | |
1040 | if (colon) { | |
1041 | ret = -EADDRNOTAVAIL; | |
1042 | if (!ifa) | |
1043 | break; | |
1044 | ret = 0; | |
1045 | if (!(ifr.ifr_flags & IFF_UP)) | |
1046 | inet_del_ifa(in_dev, ifap, 1); | |
1047 | break; | |
1048 | } | |
1049 | ret = dev_change_flags(dev, ifr.ifr_flags); | |
1050 | break; | |
1051 | ||
1052 | case SIOCSIFADDR: /* Set interface address (and family) */ | |
1053 | ret = -EINVAL; | |
1054 | if (inet_abc_len(sin->sin_addr.s_addr) < 0) | |
1055 | break; | |
1056 | ||
1057 | if (!ifa) { | |
1058 | ret = -ENOBUFS; | |
9f9354b9 ED |
1059 | ifa = inet_alloc_ifa(); |
1060 | if (!ifa) | |
1da177e4 | 1061 | break; |
c7e2e1d7 | 1062 | INIT_HLIST_NODE(&ifa->hash); |
1da177e4 LT |
1063 | if (colon) |
1064 | memcpy(ifa->ifa_label, ifr.ifr_name, IFNAMSIZ); | |
1065 | else | |
1066 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); | |
1067 | } else { | |
1068 | ret = 0; | |
1069 | if (ifa->ifa_local == sin->sin_addr.s_addr) | |
1070 | break; | |
1071 | inet_del_ifa(in_dev, ifap, 0); | |
1072 | ifa->ifa_broadcast = 0; | |
148f9729 | 1073 | ifa->ifa_scope = 0; |
1da177e4 LT |
1074 | } |
1075 | ||
1076 | ifa->ifa_address = ifa->ifa_local = sin->sin_addr.s_addr; | |
1077 | ||
1078 | if (!(dev->flags & IFF_POINTOPOINT)) { | |
1079 | ifa->ifa_prefixlen = inet_abc_len(ifa->ifa_address); | |
1080 | ifa->ifa_mask = inet_make_mask(ifa->ifa_prefixlen); | |
1081 | if ((dev->flags & IFF_BROADCAST) && | |
1082 | ifa->ifa_prefixlen < 31) | |
1083 | ifa->ifa_broadcast = ifa->ifa_address | | |
1084 | ~ifa->ifa_mask; | |
1085 | } else { | |
1086 | ifa->ifa_prefixlen = 32; | |
1087 | ifa->ifa_mask = inet_make_mask(32); | |
1088 | } | |
5c766d64 | 1089 | set_ifa_lifetime(ifa, INFINITY_LIFE_TIME, INFINITY_LIFE_TIME); |
1da177e4 LT |
1090 | ret = inet_set_ifa(dev, ifa); |
1091 | break; | |
1092 | ||
1093 | case SIOCSIFBRDADDR: /* Set the broadcast address */ | |
1094 | ret = 0; | |
1095 | if (ifa->ifa_broadcast != sin->sin_addr.s_addr) { | |
1096 | inet_del_ifa(in_dev, ifap, 0); | |
1097 | ifa->ifa_broadcast = sin->sin_addr.s_addr; | |
1098 | inet_insert_ifa(ifa); | |
1099 | } | |
1100 | break; | |
1101 | ||
1102 | case SIOCSIFDSTADDR: /* Set the destination address */ | |
1103 | ret = 0; | |
1104 | if (ifa->ifa_address == sin->sin_addr.s_addr) | |
1105 | break; | |
1106 | ret = -EINVAL; | |
1107 | if (inet_abc_len(sin->sin_addr.s_addr) < 0) | |
1108 | break; | |
1109 | ret = 0; | |
1110 | inet_del_ifa(in_dev, ifap, 0); | |
1111 | ifa->ifa_address = sin->sin_addr.s_addr; | |
1112 | inet_insert_ifa(ifa); | |
1113 | break; | |
1114 | ||
1115 | case SIOCSIFNETMASK: /* Set the netmask for the interface */ | |
1116 | ||
1117 | /* | |
1118 | * The mask we set must be legal. | |
1119 | */ | |
1120 | ret = -EINVAL; | |
1121 | if (bad_mask(sin->sin_addr.s_addr, 0)) | |
1122 | break; | |
1123 | ret = 0; | |
1124 | if (ifa->ifa_mask != sin->sin_addr.s_addr) { | |
a144ea4b | 1125 | __be32 old_mask = ifa->ifa_mask; |
1da177e4 LT |
1126 | inet_del_ifa(in_dev, ifap, 0); |
1127 | ifa->ifa_mask = sin->sin_addr.s_addr; | |
1128 | ifa->ifa_prefixlen = inet_mask_len(ifa->ifa_mask); | |
1129 | ||
1130 | /* See if current broadcast address matches | |
1131 | * with current netmask, then recalculate | |
1132 | * the broadcast address. Otherwise it's a | |
1133 | * funny address, so don't touch it since | |
1134 | * the user seems to know what (s)he's doing... | |
1135 | */ | |
1136 | if ((dev->flags & IFF_BROADCAST) && | |
1137 | (ifa->ifa_prefixlen < 31) && | |
1138 | (ifa->ifa_broadcast == | |
dcab5e1e | 1139 | (ifa->ifa_local|~old_mask))) { |
1da177e4 LT |
1140 | ifa->ifa_broadcast = (ifa->ifa_local | |
1141 | ~sin->sin_addr.s_addr); | |
1142 | } | |
1143 | inet_insert_ifa(ifa); | |
1144 | } | |
1145 | break; | |
1146 | } | |
1147 | done: | |
1148 | rtnl_unlock(); | |
1149 | out: | |
1150 | return ret; | |
1151 | rarok: | |
1152 | rtnl_unlock(); | |
1153 | ret = copy_to_user(arg, &ifr, sizeof(struct ifreq)) ? -EFAULT : 0; | |
1154 | goto out; | |
1155 | } | |
1156 | ||
1157 | static int inet_gifconf(struct net_device *dev, char __user *buf, int len) | |
1158 | { | |
e5ed6399 | 1159 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
1da177e4 LT |
1160 | struct in_ifaddr *ifa; |
1161 | struct ifreq ifr; | |
1162 | int done = 0; | |
1163 | ||
9f9354b9 | 1164 | if (!in_dev) |
1da177e4 LT |
1165 | goto out; |
1166 | ||
9f9354b9 | 1167 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { |
1da177e4 LT |
1168 | if (!buf) { |
1169 | done += sizeof(ifr); | |
1170 | continue; | |
1171 | } | |
1172 | if (len < (int) sizeof(ifr)) | |
1173 | break; | |
1174 | memset(&ifr, 0, sizeof(struct ifreq)); | |
4299c8a9 | 1175 | strcpy(ifr.ifr_name, ifa->ifa_label); |
1da177e4 LT |
1176 | |
1177 | (*(struct sockaddr_in *)&ifr.ifr_addr).sin_family = AF_INET; | |
1178 | (*(struct sockaddr_in *)&ifr.ifr_addr).sin_addr.s_addr = | |
1179 | ifa->ifa_local; | |
1180 | ||
1181 | if (copy_to_user(buf, &ifr, sizeof(struct ifreq))) { | |
1182 | done = -EFAULT; | |
1183 | break; | |
1184 | } | |
1185 | buf += sizeof(struct ifreq); | |
1186 | len -= sizeof(struct ifreq); | |
1187 | done += sizeof(struct ifreq); | |
1188 | } | |
1189 | out: | |
1190 | return done; | |
1191 | } | |
1192 | ||
a61ced5d | 1193 | __be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope) |
1da177e4 | 1194 | { |
a61ced5d | 1195 | __be32 addr = 0; |
1da177e4 | 1196 | struct in_device *in_dev; |
c346dca1 | 1197 | struct net *net = dev_net(dev); |
1da177e4 LT |
1198 | |
1199 | rcu_read_lock(); | |
e5ed6399 | 1200 | in_dev = __in_dev_get_rcu(dev); |
1da177e4 LT |
1201 | if (!in_dev) |
1202 | goto no_in_dev; | |
1203 | ||
1204 | for_primary_ifa(in_dev) { | |
1205 | if (ifa->ifa_scope > scope) | |
1206 | continue; | |
1207 | if (!dst || inet_ifa_match(dst, ifa)) { | |
1208 | addr = ifa->ifa_local; | |
1209 | break; | |
1210 | } | |
1211 | if (!addr) | |
1212 | addr = ifa->ifa_local; | |
1213 | } endfor_ifa(in_dev); | |
1da177e4 LT |
1214 | |
1215 | if (addr) | |
c6d14c84 | 1216 | goto out_unlock; |
9f9354b9 | 1217 | no_in_dev: |
1da177e4 LT |
1218 | |
1219 | /* Not loopback addresses on loopback should be preferred | |
ca9f1fd2 | 1220 | in this case. It is important that lo is the first interface |
1da177e4 LT |
1221 | in dev_base list. |
1222 | */ | |
c6d14c84 | 1223 | for_each_netdev_rcu(net, dev) { |
9f9354b9 ED |
1224 | in_dev = __in_dev_get_rcu(dev); |
1225 | if (!in_dev) | |
1da177e4 LT |
1226 | continue; |
1227 | ||
1228 | for_primary_ifa(in_dev) { | |
1229 | if (ifa->ifa_scope != RT_SCOPE_LINK && | |
1230 | ifa->ifa_scope <= scope) { | |
1231 | addr = ifa->ifa_local; | |
c6d14c84 | 1232 | goto out_unlock; |
1da177e4 LT |
1233 | } |
1234 | } endfor_ifa(in_dev); | |
1235 | } | |
c6d14c84 | 1236 | out_unlock: |
1da177e4 | 1237 | rcu_read_unlock(); |
1da177e4 LT |
1238 | return addr; |
1239 | } | |
9f9354b9 | 1240 | EXPORT_SYMBOL(inet_select_addr); |
1da177e4 | 1241 | |
60cad5da AV |
1242 | static __be32 confirm_addr_indev(struct in_device *in_dev, __be32 dst, |
1243 | __be32 local, int scope) | |
1da177e4 LT |
1244 | { |
1245 | int same = 0; | |
a144ea4b | 1246 | __be32 addr = 0; |
1da177e4 LT |
1247 | |
1248 | for_ifa(in_dev) { | |
1249 | if (!addr && | |
1250 | (local == ifa->ifa_local || !local) && | |
1251 | ifa->ifa_scope <= scope) { | |
1252 | addr = ifa->ifa_local; | |
1253 | if (same) | |
1254 | break; | |
1255 | } | |
1256 | if (!same) { | |
1257 | same = (!local || inet_ifa_match(local, ifa)) && | |
1258 | (!dst || inet_ifa_match(dst, ifa)); | |
1259 | if (same && addr) { | |
1260 | if (local || !dst) | |
1261 | break; | |
1262 | /* Is the selected addr into dst subnet? */ | |
1263 | if (inet_ifa_match(addr, ifa)) | |
1264 | break; | |
1265 | /* No, then can we use new local src? */ | |
1266 | if (ifa->ifa_scope <= scope) { | |
1267 | addr = ifa->ifa_local; | |
1268 | break; | |
1269 | } | |
1270 | /* search for large dst subnet for addr */ | |
1271 | same = 0; | |
1272 | } | |
1273 | } | |
1274 | } endfor_ifa(in_dev); | |
1275 | ||
9f9354b9 | 1276 | return same ? addr : 0; |
1da177e4 LT |
1277 | } |
1278 | ||
1279 | /* | |
1280 | * Confirm that local IP address exists using wildcards: | |
b601fa19 ND |
1281 | * - net: netns to check, cannot be NULL |
1282 | * - in_dev: only on this interface, NULL=any interface | |
1da177e4 LT |
1283 | * - dst: only in the same subnet as dst, 0=any dst |
1284 | * - local: address, 0=autoselect the local address | |
1285 | * - scope: maximum allowed scope value for the local address | |
1286 | */ | |
b601fa19 | 1287 | __be32 inet_confirm_addr(struct net *net, struct in_device *in_dev, |
9bd85e32 | 1288 | __be32 dst, __be32 local, int scope) |
1da177e4 | 1289 | { |
60cad5da | 1290 | __be32 addr = 0; |
9bd85e32 | 1291 | struct net_device *dev; |
1da177e4 | 1292 | |
b601fa19 | 1293 | if (in_dev != NULL) |
9bd85e32 | 1294 | return confirm_addr_indev(in_dev, dst, local, scope); |
1da177e4 | 1295 | |
1da177e4 | 1296 | rcu_read_lock(); |
c6d14c84 | 1297 | for_each_netdev_rcu(net, dev) { |
9f9354b9 ED |
1298 | in_dev = __in_dev_get_rcu(dev); |
1299 | if (in_dev) { | |
1da177e4 LT |
1300 | addr = confirm_addr_indev(in_dev, dst, local, scope); |
1301 | if (addr) | |
1302 | break; | |
1303 | } | |
1304 | } | |
1305 | rcu_read_unlock(); | |
1da177e4 LT |
1306 | |
1307 | return addr; | |
1308 | } | |
eaddcd76 | 1309 | EXPORT_SYMBOL(inet_confirm_addr); |
1da177e4 LT |
1310 | |
1311 | /* | |
1312 | * Device notifier | |
1313 | */ | |
1314 | ||
1315 | int register_inetaddr_notifier(struct notifier_block *nb) | |
1316 | { | |
e041c683 | 1317 | return blocking_notifier_chain_register(&inetaddr_chain, nb); |
1da177e4 | 1318 | } |
9f9354b9 | 1319 | EXPORT_SYMBOL(register_inetaddr_notifier); |
1da177e4 LT |
1320 | |
1321 | int unregister_inetaddr_notifier(struct notifier_block *nb) | |
1322 | { | |
e041c683 | 1323 | return blocking_notifier_chain_unregister(&inetaddr_chain, nb); |
1da177e4 | 1324 | } |
9f9354b9 | 1325 | EXPORT_SYMBOL(unregister_inetaddr_notifier); |
1da177e4 | 1326 | |
9f9354b9 ED |
1327 | /* Rename ifa_labels for a device name change. Make some effort to preserve |
1328 | * existing alias numbering and to create unique labels if possible. | |
1da177e4 LT |
1329 | */ |
1330 | static void inetdev_changename(struct net_device *dev, struct in_device *in_dev) | |
e905a9ed | 1331 | { |
1da177e4 LT |
1332 | struct in_ifaddr *ifa; |
1333 | int named = 0; | |
1334 | ||
e905a9ed YH |
1335 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { |
1336 | char old[IFNAMSIZ], *dot; | |
1da177e4 LT |
1337 | |
1338 | memcpy(old, ifa->ifa_label, IFNAMSIZ); | |
e905a9ed | 1339 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); |
1da177e4 | 1340 | if (named++ == 0) |
573bf470 | 1341 | goto skip; |
44344b2a | 1342 | dot = strchr(old, ':'); |
e905a9ed YH |
1343 | if (dot == NULL) { |
1344 | sprintf(old, ":%d", named); | |
1da177e4 LT |
1345 | dot = old; |
1346 | } | |
9f9354b9 | 1347 | if (strlen(dot) + strlen(dev->name) < IFNAMSIZ) |
e905a9ed | 1348 | strcat(ifa->ifa_label, dot); |
9f9354b9 | 1349 | else |
e905a9ed | 1350 | strcpy(ifa->ifa_label + (IFNAMSIZ - strlen(dot) - 1), dot); |
573bf470 TG |
1351 | skip: |
1352 | rtmsg_ifa(RTM_NEWADDR, ifa, NULL, 0); | |
e905a9ed YH |
1353 | } |
1354 | } | |
1da177e4 | 1355 | |
40384999 | 1356 | static bool inetdev_valid_mtu(unsigned int mtu) |
06770843 BL |
1357 | { |
1358 | return mtu >= 68; | |
1359 | } | |
1360 | ||
d11327ad IC |
1361 | static void inetdev_send_gratuitous_arp(struct net_device *dev, |
1362 | struct in_device *in_dev) | |
1363 | ||
1364 | { | |
b76d0789 | 1365 | struct in_ifaddr *ifa; |
d11327ad | 1366 | |
b76d0789 ZK |
1367 | for (ifa = in_dev->ifa_list; ifa; |
1368 | ifa = ifa->ifa_next) { | |
1369 | arp_send(ARPOP_REQUEST, ETH_P_ARP, | |
1370 | ifa->ifa_local, dev, | |
1371 | ifa->ifa_local, NULL, | |
1372 | dev->dev_addr, NULL); | |
1373 | } | |
d11327ad IC |
1374 | } |
1375 | ||
1da177e4 LT |
1376 | /* Called only under RTNL semaphore */ |
1377 | ||
1378 | static int inetdev_event(struct notifier_block *this, unsigned long event, | |
1379 | void *ptr) | |
1380 | { | |
351638e7 | 1381 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
748e2d93 | 1382 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
0115e8e3 | 1383 | |
1da177e4 LT |
1384 | ASSERT_RTNL(); |
1385 | ||
1386 | if (!in_dev) { | |
8030f544 | 1387 | if (event == NETDEV_REGISTER) { |
1da177e4 | 1388 | in_dev = inetdev_init(dev); |
20e61da7 WC |
1389 | if (IS_ERR(in_dev)) |
1390 | return notifier_from_errno(PTR_ERR(in_dev)); | |
0cc217e1 | 1391 | if (dev->flags & IFF_LOOPBACK) { |
42f811b8 HX |
1392 | IN_DEV_CONF_SET(in_dev, NOXFRM, 1); |
1393 | IN_DEV_CONF_SET(in_dev, NOPOLICY, 1); | |
8030f544 | 1394 | } |
06770843 BL |
1395 | } else if (event == NETDEV_CHANGEMTU) { |
1396 | /* Re-enabling IP */ | |
1397 | if (inetdev_valid_mtu(dev->mtu)) | |
1398 | in_dev = inetdev_init(dev); | |
1da177e4 LT |
1399 | } |
1400 | goto out; | |
1401 | } | |
1402 | ||
1403 | switch (event) { | |
1404 | case NETDEV_REGISTER: | |
91df42be | 1405 | pr_debug("%s: bug\n", __func__); |
a9b3cd7f | 1406 | RCU_INIT_POINTER(dev->ip_ptr, NULL); |
1da177e4 LT |
1407 | break; |
1408 | case NETDEV_UP: | |
06770843 | 1409 | if (!inetdev_valid_mtu(dev->mtu)) |
1da177e4 | 1410 | break; |
0cc217e1 | 1411 | if (dev->flags & IFF_LOOPBACK) { |
9f9354b9 ED |
1412 | struct in_ifaddr *ifa = inet_alloc_ifa(); |
1413 | ||
1414 | if (ifa) { | |
fd23c3b3 | 1415 | INIT_HLIST_NODE(&ifa->hash); |
1da177e4 LT |
1416 | ifa->ifa_local = |
1417 | ifa->ifa_address = htonl(INADDR_LOOPBACK); | |
1418 | ifa->ifa_prefixlen = 8; | |
1419 | ifa->ifa_mask = inet_make_mask(8); | |
1420 | in_dev_hold(in_dev); | |
1421 | ifa->ifa_dev = in_dev; | |
1422 | ifa->ifa_scope = RT_SCOPE_HOST; | |
1423 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); | |
5c766d64 JP |
1424 | set_ifa_lifetime(ifa, INFINITY_LIFE_TIME, |
1425 | INFINITY_LIFE_TIME); | |
dfd1582d JP |
1426 | ipv4_devconf_setall(in_dev); |
1427 | neigh_parms_data_state_setall(in_dev->arp_parms); | |
1da177e4 LT |
1428 | inet_insert_ifa(ifa); |
1429 | } | |
1430 | } | |
1431 | ip_mc_up(in_dev); | |
eefef1cf SH |
1432 | /* fall through */ |
1433 | case NETDEV_CHANGEADDR: | |
d11327ad IC |
1434 | if (!IN_DEV_ARP_NOTIFY(in_dev)) |
1435 | break; | |
1436 | /* fall through */ | |
1437 | case NETDEV_NOTIFY_PEERS: | |
a21090cf | 1438 | /* Send gratuitous ARP to notify of link change */ |
d11327ad | 1439 | inetdev_send_gratuitous_arp(dev, in_dev); |
1da177e4 LT |
1440 | break; |
1441 | case NETDEV_DOWN: | |
1442 | ip_mc_down(in_dev); | |
1443 | break; | |
93d9b7d7 | 1444 | case NETDEV_PRE_TYPE_CHANGE: |
75c78500 MS |
1445 | ip_mc_unmap(in_dev); |
1446 | break; | |
93d9b7d7 | 1447 | case NETDEV_POST_TYPE_CHANGE: |
75c78500 MS |
1448 | ip_mc_remap(in_dev); |
1449 | break; | |
1da177e4 | 1450 | case NETDEV_CHANGEMTU: |
06770843 | 1451 | if (inetdev_valid_mtu(dev->mtu)) |
1da177e4 | 1452 | break; |
06770843 | 1453 | /* disable IP when MTU is not enough */ |
1da177e4 LT |
1454 | case NETDEV_UNREGISTER: |
1455 | inetdev_destroy(in_dev); | |
1456 | break; | |
1457 | case NETDEV_CHANGENAME: | |
1458 | /* Do not notify about label change, this event is | |
1459 | * not interesting to applications using netlink. | |
1460 | */ | |
1461 | inetdev_changename(dev, in_dev); | |
1462 | ||
51602b2a | 1463 | devinet_sysctl_unregister(in_dev); |
66f27a52 | 1464 | devinet_sysctl_register(in_dev); |
1da177e4 LT |
1465 | break; |
1466 | } | |
1467 | out: | |
1468 | return NOTIFY_DONE; | |
1469 | } | |
1470 | ||
1471 | static struct notifier_block ip_netdev_notifier = { | |
539afedf | 1472 | .notifier_call = inetdev_event, |
1da177e4 LT |
1473 | }; |
1474 | ||
40384999 | 1475 | static size_t inet_nlmsg_size(void) |
339bf98f TG |
1476 | { |
1477 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) | |
1478 | + nla_total_size(4) /* IFA_ADDRESS */ | |
1479 | + nla_total_size(4) /* IFA_LOCAL */ | |
1480 | + nla_total_size(4) /* IFA_BROADCAST */ | |
ad6c8135 | 1481 | + nla_total_size(IFNAMSIZ) /* IFA_LABEL */ |
63b5f152 GU |
1482 | + nla_total_size(4) /* IFA_FLAGS */ |
1483 | + nla_total_size(sizeof(struct ifa_cacheinfo)); /* IFA_CACHEINFO */ | |
339bf98f TG |
1484 | } |
1485 | ||
5c766d64 JP |
1486 | static inline u32 cstamp_delta(unsigned long cstamp) |
1487 | { | |
1488 | return (cstamp - INITIAL_JIFFIES) * 100UL / HZ; | |
1489 | } | |
1490 | ||
1491 | static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp, | |
1492 | unsigned long tstamp, u32 preferred, u32 valid) | |
1493 | { | |
1494 | struct ifa_cacheinfo ci; | |
1495 | ||
1496 | ci.cstamp = cstamp_delta(cstamp); | |
1497 | ci.tstamp = cstamp_delta(tstamp); | |
1498 | ci.ifa_prefered = preferred; | |
1499 | ci.ifa_valid = valid; | |
1500 | ||
1501 | return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci); | |
1502 | } | |
1503 | ||
1da177e4 | 1504 | static int inet_fill_ifaddr(struct sk_buff *skb, struct in_ifaddr *ifa, |
15e47304 | 1505 | u32 portid, u32 seq, int event, unsigned int flags) |
1da177e4 LT |
1506 | { |
1507 | struct ifaddrmsg *ifm; | |
1508 | struct nlmsghdr *nlh; | |
5c766d64 | 1509 | u32 preferred, valid; |
1da177e4 | 1510 | |
15e47304 | 1511 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*ifm), flags); |
47f68512 | 1512 | if (nlh == NULL) |
26932566 | 1513 | return -EMSGSIZE; |
47f68512 TG |
1514 | |
1515 | ifm = nlmsg_data(nlh); | |
1da177e4 LT |
1516 | ifm->ifa_family = AF_INET; |
1517 | ifm->ifa_prefixlen = ifa->ifa_prefixlen; | |
5c766d64 | 1518 | ifm->ifa_flags = ifa->ifa_flags; |
1da177e4 LT |
1519 | ifm->ifa_scope = ifa->ifa_scope; |
1520 | ifm->ifa_index = ifa->ifa_dev->dev->ifindex; | |
47f68512 | 1521 | |
5c766d64 JP |
1522 | if (!(ifm->ifa_flags & IFA_F_PERMANENT)) { |
1523 | preferred = ifa->ifa_preferred_lft; | |
1524 | valid = ifa->ifa_valid_lft; | |
1525 | if (preferred != INFINITY_LIFE_TIME) { | |
1526 | long tval = (jiffies - ifa->ifa_tstamp) / HZ; | |
1527 | ||
1528 | if (preferred > tval) | |
1529 | preferred -= tval; | |
1530 | else | |
1531 | preferred = 0; | |
1532 | if (valid != INFINITY_LIFE_TIME) { | |
1533 | if (valid > tval) | |
1534 | valid -= tval; | |
1535 | else | |
1536 | valid = 0; | |
1537 | } | |
1538 | } | |
1539 | } else { | |
1540 | preferred = INFINITY_LIFE_TIME; | |
1541 | valid = INFINITY_LIFE_TIME; | |
1542 | } | |
f3756b79 DM |
1543 | if ((ifa->ifa_address && |
1544 | nla_put_be32(skb, IFA_ADDRESS, ifa->ifa_address)) || | |
1545 | (ifa->ifa_local && | |
1546 | nla_put_be32(skb, IFA_LOCAL, ifa->ifa_local)) || | |
1547 | (ifa->ifa_broadcast && | |
1548 | nla_put_be32(skb, IFA_BROADCAST, ifa->ifa_broadcast)) || | |
1549 | (ifa->ifa_label[0] && | |
5c766d64 | 1550 | nla_put_string(skb, IFA_LABEL, ifa->ifa_label)) || |
ad6c8135 | 1551 | nla_put_u32(skb, IFA_FLAGS, ifa->ifa_flags) || |
5c766d64 JP |
1552 | put_cacheinfo(skb, ifa->ifa_cstamp, ifa->ifa_tstamp, |
1553 | preferred, valid)) | |
f3756b79 | 1554 | goto nla_put_failure; |
1da177e4 | 1555 | |
053c095a JB |
1556 | nlmsg_end(skb, nlh); |
1557 | return 0; | |
47f68512 TG |
1558 | |
1559 | nla_put_failure: | |
26932566 PM |
1560 | nlmsg_cancel(skb, nlh); |
1561 | return -EMSGSIZE; | |
1da177e4 LT |
1562 | } |
1563 | ||
1564 | static int inet_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) | |
1565 | { | |
3b1e0a65 | 1566 | struct net *net = sock_net(skb->sk); |
eec4df98 ED |
1567 | int h, s_h; |
1568 | int idx, s_idx; | |
1569 | int ip_idx, s_ip_idx; | |
1da177e4 LT |
1570 | struct net_device *dev; |
1571 | struct in_device *in_dev; | |
1572 | struct in_ifaddr *ifa; | |
eec4df98 | 1573 | struct hlist_head *head; |
1da177e4 | 1574 | |
eec4df98 ED |
1575 | s_h = cb->args[0]; |
1576 | s_idx = idx = cb->args[1]; | |
1577 | s_ip_idx = ip_idx = cb->args[2]; | |
1578 | ||
1579 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
1580 | idx = 0; | |
1581 | head = &net->dev_index_head[h]; | |
1582 | rcu_read_lock(); | |
0465277f ND |
1583 | cb->seq = atomic_read(&net->ipv4.dev_addr_genid) ^ |
1584 | net->dev_base_seq; | |
b67bfe0d | 1585 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
eec4df98 ED |
1586 | if (idx < s_idx) |
1587 | goto cont; | |
4b97efdf | 1588 | if (h > s_h || idx > s_idx) |
eec4df98 ED |
1589 | s_ip_idx = 0; |
1590 | in_dev = __in_dev_get_rcu(dev); | |
1591 | if (!in_dev) | |
1592 | goto cont; | |
1da177e4 | 1593 | |
eec4df98 ED |
1594 | for (ifa = in_dev->ifa_list, ip_idx = 0; ifa; |
1595 | ifa = ifa->ifa_next, ip_idx++) { | |
1596 | if (ip_idx < s_ip_idx) | |
1597 | continue; | |
1598 | if (inet_fill_ifaddr(skb, ifa, | |
15e47304 | 1599 | NETLINK_CB(cb->skb).portid, |
1da177e4 | 1600 | cb->nlh->nlmsg_seq, |
053c095a | 1601 | RTM_NEWADDR, NLM_F_MULTI) < 0) { |
eec4df98 ED |
1602 | rcu_read_unlock(); |
1603 | goto done; | |
1604 | } | |
0465277f | 1605 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
eec4df98 | 1606 | } |
7562f876 | 1607 | cont: |
eec4df98 ED |
1608 | idx++; |
1609 | } | |
1610 | rcu_read_unlock(); | |
1da177e4 LT |
1611 | } |
1612 | ||
1613 | done: | |
eec4df98 ED |
1614 | cb->args[0] = h; |
1615 | cb->args[1] = idx; | |
1616 | cb->args[2] = ip_idx; | |
1da177e4 LT |
1617 | |
1618 | return skb->len; | |
1619 | } | |
1620 | ||
539afedf | 1621 | static void rtmsg_ifa(int event, struct in_ifaddr *ifa, struct nlmsghdr *nlh, |
15e47304 | 1622 | u32 portid) |
1da177e4 | 1623 | { |
47f68512 | 1624 | struct sk_buff *skb; |
d6062cbb TG |
1625 | u32 seq = nlh ? nlh->nlmsg_seq : 0; |
1626 | int err = -ENOBUFS; | |
4b8aa9ab | 1627 | struct net *net; |
1da177e4 | 1628 | |
c346dca1 | 1629 | net = dev_net(ifa->ifa_dev->dev); |
339bf98f | 1630 | skb = nlmsg_new(inet_nlmsg_size(), GFP_KERNEL); |
47f68512 | 1631 | if (skb == NULL) |
d6062cbb TG |
1632 | goto errout; |
1633 | ||
15e47304 | 1634 | err = inet_fill_ifaddr(skb, ifa, portid, seq, event, 0); |
26932566 PM |
1635 | if (err < 0) { |
1636 | /* -EMSGSIZE implies BUG in inet_nlmsg_size() */ | |
1637 | WARN_ON(err == -EMSGSIZE); | |
1638 | kfree_skb(skb); | |
1639 | goto errout; | |
1640 | } | |
15e47304 | 1641 | rtnl_notify(skb, net, portid, RTNLGRP_IPV4_IFADDR, nlh, GFP_KERNEL); |
1ce85fe4 | 1642 | return; |
d6062cbb TG |
1643 | errout: |
1644 | if (err < 0) | |
4b8aa9ab | 1645 | rtnl_set_sk_err(net, RTNLGRP_IPV4_IFADDR, err); |
1da177e4 LT |
1646 | } |
1647 | ||
9f0f7272 TG |
1648 | static size_t inet_get_link_af_size(const struct net_device *dev) |
1649 | { | |
1fc19aff | 1650 | struct in_device *in_dev = rcu_dereference_rtnl(dev->ip_ptr); |
9f0f7272 TG |
1651 | |
1652 | if (!in_dev) | |
1653 | return 0; | |
1654 | ||
1655 | return nla_total_size(IPV4_DEVCONF_MAX * 4); /* IFLA_INET_CONF */ | |
1656 | } | |
1657 | ||
1658 | static int inet_fill_link_af(struct sk_buff *skb, const struct net_device *dev) | |
1659 | { | |
1fc19aff | 1660 | struct in_device *in_dev = rcu_dereference_rtnl(dev->ip_ptr); |
9f0f7272 TG |
1661 | struct nlattr *nla; |
1662 | int i; | |
1663 | ||
1664 | if (!in_dev) | |
1665 | return -ENODATA; | |
1666 | ||
1667 | nla = nla_reserve(skb, IFLA_INET_CONF, IPV4_DEVCONF_MAX * 4); | |
1668 | if (nla == NULL) | |
1669 | return -EMSGSIZE; | |
1670 | ||
1671 | for (i = 0; i < IPV4_DEVCONF_MAX; i++) | |
1672 | ((u32 *) nla_data(nla))[i] = in_dev->cnf.data[i]; | |
1673 | ||
1674 | return 0; | |
1675 | } | |
1676 | ||
1677 | static const struct nla_policy inet_af_policy[IFLA_INET_MAX+1] = { | |
1678 | [IFLA_INET_CONF] = { .type = NLA_NESTED }, | |
1679 | }; | |
1680 | ||
cf7afbfe TG |
1681 | static int inet_validate_link_af(const struct net_device *dev, |
1682 | const struct nlattr *nla) | |
9f0f7272 | 1683 | { |
9f0f7272 TG |
1684 | struct nlattr *a, *tb[IFLA_INET_MAX+1]; |
1685 | int err, rem; | |
1686 | ||
f7fce74e | 1687 | if (dev && !__in_dev_get_rtnl(dev)) |
cf7afbfe | 1688 | return -EAFNOSUPPORT; |
9f0f7272 TG |
1689 | |
1690 | err = nla_parse_nested(tb, IFLA_INET_MAX, nla, inet_af_policy); | |
1691 | if (err < 0) | |
1692 | return err; | |
1693 | ||
1694 | if (tb[IFLA_INET_CONF]) { | |
1695 | nla_for_each_nested(a, tb[IFLA_INET_CONF], rem) { | |
1696 | int cfgid = nla_type(a); | |
1697 | ||
1698 | if (nla_len(a) < 4) | |
1699 | return -EINVAL; | |
1700 | ||
1701 | if (cfgid <= 0 || cfgid > IPV4_DEVCONF_MAX) | |
1702 | return -EINVAL; | |
1703 | } | |
1704 | } | |
1705 | ||
cf7afbfe TG |
1706 | return 0; |
1707 | } | |
1708 | ||
1709 | static int inet_set_link_af(struct net_device *dev, const struct nlattr *nla) | |
1710 | { | |
f7fce74e | 1711 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
cf7afbfe TG |
1712 | struct nlattr *a, *tb[IFLA_INET_MAX+1]; |
1713 | int rem; | |
1714 | ||
1715 | if (!in_dev) | |
1716 | return -EAFNOSUPPORT; | |
1717 | ||
1718 | if (nla_parse_nested(tb, IFLA_INET_MAX, nla, NULL) < 0) | |
1719 | BUG(); | |
1720 | ||
9f0f7272 TG |
1721 | if (tb[IFLA_INET_CONF]) { |
1722 | nla_for_each_nested(a, tb[IFLA_INET_CONF], rem) | |
1723 | ipv4_devconf_set(in_dev, nla_type(a), nla_get_u32(a)); | |
1724 | } | |
1725 | ||
1726 | return 0; | |
1727 | } | |
1728 | ||
edc9e748 ND |
1729 | static int inet_netconf_msgsize_devconf(int type) |
1730 | { | |
1731 | int size = NLMSG_ALIGN(sizeof(struct netconfmsg)) | |
1732 | + nla_total_size(4); /* NETCONFA_IFINDEX */ | |
1733 | ||
9e551110 ND |
1734 | /* type -1 is used for ALL */ |
1735 | if (type == -1 || type == NETCONFA_FORWARDING) | |
edc9e748 | 1736 | size += nla_total_size(4); |
cc535dfb ND |
1737 | if (type == -1 || type == NETCONFA_RP_FILTER) |
1738 | size += nla_total_size(4); | |
d67b8c61 ND |
1739 | if (type == -1 || type == NETCONFA_MC_FORWARDING) |
1740 | size += nla_total_size(4); | |
09aea5df | 1741 | if (type == -1 || type == NETCONFA_PROXY_NEIGH) |
f085ff1c | 1742 | size += nla_total_size(4); |
edc9e748 ND |
1743 | |
1744 | return size; | |
1745 | } | |
1746 | ||
1747 | static int inet_netconf_fill_devconf(struct sk_buff *skb, int ifindex, | |
1748 | struct ipv4_devconf *devconf, u32 portid, | |
1749 | u32 seq, int event, unsigned int flags, | |
1750 | int type) | |
1751 | { | |
1752 | struct nlmsghdr *nlh; | |
1753 | struct netconfmsg *ncm; | |
1754 | ||
1755 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct netconfmsg), | |
1756 | flags); | |
1757 | if (nlh == NULL) | |
1758 | return -EMSGSIZE; | |
1759 | ||
1760 | ncm = nlmsg_data(nlh); | |
1761 | ncm->ncm_family = AF_INET; | |
1762 | ||
1763 | if (nla_put_s32(skb, NETCONFA_IFINDEX, ifindex) < 0) | |
1764 | goto nla_put_failure; | |
1765 | ||
9e551110 ND |
1766 | /* type -1 is used for ALL */ |
1767 | if ((type == -1 || type == NETCONFA_FORWARDING) && | |
edc9e748 ND |
1768 | nla_put_s32(skb, NETCONFA_FORWARDING, |
1769 | IPV4_DEVCONF(*devconf, FORWARDING)) < 0) | |
1770 | goto nla_put_failure; | |
cc535dfb ND |
1771 | if ((type == -1 || type == NETCONFA_RP_FILTER) && |
1772 | nla_put_s32(skb, NETCONFA_RP_FILTER, | |
1773 | IPV4_DEVCONF(*devconf, RP_FILTER)) < 0) | |
1774 | goto nla_put_failure; | |
d67b8c61 ND |
1775 | if ((type == -1 || type == NETCONFA_MC_FORWARDING) && |
1776 | nla_put_s32(skb, NETCONFA_MC_FORWARDING, | |
1777 | IPV4_DEVCONF(*devconf, MC_FORWARDING)) < 0) | |
1778 | goto nla_put_failure; | |
09aea5df | 1779 | if ((type == -1 || type == NETCONFA_PROXY_NEIGH) && |
1780 | nla_put_s32(skb, NETCONFA_PROXY_NEIGH, | |
f085ff1c | 1781 | IPV4_DEVCONF(*devconf, PROXY_ARP)) < 0) |
1782 | goto nla_put_failure; | |
edc9e748 | 1783 | |
053c095a JB |
1784 | nlmsg_end(skb, nlh); |
1785 | return 0; | |
edc9e748 ND |
1786 | |
1787 | nla_put_failure: | |
1788 | nlmsg_cancel(skb, nlh); | |
1789 | return -EMSGSIZE; | |
1790 | } | |
1791 | ||
d67b8c61 ND |
1792 | void inet_netconf_notify_devconf(struct net *net, int type, int ifindex, |
1793 | struct ipv4_devconf *devconf) | |
edc9e748 ND |
1794 | { |
1795 | struct sk_buff *skb; | |
1796 | int err = -ENOBUFS; | |
1797 | ||
1798 | skb = nlmsg_new(inet_netconf_msgsize_devconf(type), GFP_ATOMIC); | |
1799 | if (skb == NULL) | |
1800 | goto errout; | |
1801 | ||
1802 | err = inet_netconf_fill_devconf(skb, ifindex, devconf, 0, 0, | |
1803 | RTM_NEWNETCONF, 0, type); | |
1804 | if (err < 0) { | |
1805 | /* -EMSGSIZE implies BUG in inet_netconf_msgsize_devconf() */ | |
1806 | WARN_ON(err == -EMSGSIZE); | |
1807 | kfree_skb(skb); | |
1808 | goto errout; | |
1809 | } | |
1810 | rtnl_notify(skb, net, 0, RTNLGRP_IPV4_NETCONF, NULL, GFP_ATOMIC); | |
1811 | return; | |
1812 | errout: | |
1813 | if (err < 0) | |
1814 | rtnl_set_sk_err(net, RTNLGRP_IPV4_NETCONF, err); | |
1815 | } | |
1816 | ||
9e551110 ND |
1817 | static const struct nla_policy devconf_ipv4_policy[NETCONFA_MAX+1] = { |
1818 | [NETCONFA_IFINDEX] = { .len = sizeof(int) }, | |
1819 | [NETCONFA_FORWARDING] = { .len = sizeof(int) }, | |
cc535dfb | 1820 | [NETCONFA_RP_FILTER] = { .len = sizeof(int) }, |
09aea5df | 1821 | [NETCONFA_PROXY_NEIGH] = { .len = sizeof(int) }, |
9e551110 ND |
1822 | }; |
1823 | ||
1824 | static int inet_netconf_get_devconf(struct sk_buff *in_skb, | |
661d2967 | 1825 | struct nlmsghdr *nlh) |
9e551110 ND |
1826 | { |
1827 | struct net *net = sock_net(in_skb->sk); | |
1828 | struct nlattr *tb[NETCONFA_MAX+1]; | |
1829 | struct netconfmsg *ncm; | |
1830 | struct sk_buff *skb; | |
1831 | struct ipv4_devconf *devconf; | |
1832 | struct in_device *in_dev; | |
1833 | struct net_device *dev; | |
1834 | int ifindex; | |
1835 | int err; | |
1836 | ||
1837 | err = nlmsg_parse(nlh, sizeof(*ncm), tb, NETCONFA_MAX, | |
1838 | devconf_ipv4_policy); | |
1839 | if (err < 0) | |
1840 | goto errout; | |
1841 | ||
1842 | err = EINVAL; | |
1843 | if (!tb[NETCONFA_IFINDEX]) | |
1844 | goto errout; | |
1845 | ||
1846 | ifindex = nla_get_s32(tb[NETCONFA_IFINDEX]); | |
1847 | switch (ifindex) { | |
1848 | case NETCONFA_IFINDEX_ALL: | |
1849 | devconf = net->ipv4.devconf_all; | |
1850 | break; | |
1851 | case NETCONFA_IFINDEX_DEFAULT: | |
1852 | devconf = net->ipv4.devconf_dflt; | |
1853 | break; | |
1854 | default: | |
1855 | dev = __dev_get_by_index(net, ifindex); | |
1856 | if (dev == NULL) | |
1857 | goto errout; | |
1858 | in_dev = __in_dev_get_rtnl(dev); | |
1859 | if (in_dev == NULL) | |
1860 | goto errout; | |
1861 | devconf = &in_dev->cnf; | |
1862 | break; | |
1863 | } | |
1864 | ||
1865 | err = -ENOBUFS; | |
1866 | skb = nlmsg_new(inet_netconf_msgsize_devconf(-1), GFP_ATOMIC); | |
1867 | if (skb == NULL) | |
1868 | goto errout; | |
1869 | ||
1870 | err = inet_netconf_fill_devconf(skb, ifindex, devconf, | |
1871 | NETLINK_CB(in_skb).portid, | |
1872 | nlh->nlmsg_seq, RTM_NEWNETCONF, 0, | |
1873 | -1); | |
1874 | if (err < 0) { | |
1875 | /* -EMSGSIZE implies BUG in inet_netconf_msgsize_devconf() */ | |
1876 | WARN_ON(err == -EMSGSIZE); | |
1877 | kfree_skb(skb); | |
1878 | goto errout; | |
1879 | } | |
1880 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); | |
1881 | errout: | |
1882 | return err; | |
1883 | } | |
1884 | ||
7a674200 ND |
1885 | static int inet_netconf_dump_devconf(struct sk_buff *skb, |
1886 | struct netlink_callback *cb) | |
1887 | { | |
1888 | struct net *net = sock_net(skb->sk); | |
1889 | int h, s_h; | |
1890 | int idx, s_idx; | |
1891 | struct net_device *dev; | |
1892 | struct in_device *in_dev; | |
1893 | struct hlist_head *head; | |
1894 | ||
1895 | s_h = cb->args[0]; | |
1896 | s_idx = idx = cb->args[1]; | |
1897 | ||
1898 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
1899 | idx = 0; | |
1900 | head = &net->dev_index_head[h]; | |
1901 | rcu_read_lock(); | |
0465277f ND |
1902 | cb->seq = atomic_read(&net->ipv4.dev_addr_genid) ^ |
1903 | net->dev_base_seq; | |
7a674200 ND |
1904 | hlist_for_each_entry_rcu(dev, head, index_hlist) { |
1905 | if (idx < s_idx) | |
1906 | goto cont; | |
1907 | in_dev = __in_dev_get_rcu(dev); | |
1908 | if (!in_dev) | |
1909 | goto cont; | |
1910 | ||
1911 | if (inet_netconf_fill_devconf(skb, dev->ifindex, | |
1912 | &in_dev->cnf, | |
1913 | NETLINK_CB(cb->skb).portid, | |
1914 | cb->nlh->nlmsg_seq, | |
1915 | RTM_NEWNETCONF, | |
1916 | NLM_F_MULTI, | |
7b46a644 | 1917 | -1) < 0) { |
7a674200 ND |
1918 | rcu_read_unlock(); |
1919 | goto done; | |
1920 | } | |
0465277f | 1921 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
7a674200 ND |
1922 | cont: |
1923 | idx++; | |
1924 | } | |
1925 | rcu_read_unlock(); | |
1926 | } | |
1927 | if (h == NETDEV_HASHENTRIES) { | |
1928 | if (inet_netconf_fill_devconf(skb, NETCONFA_IFINDEX_ALL, | |
1929 | net->ipv4.devconf_all, | |
1930 | NETLINK_CB(cb->skb).portid, | |
1931 | cb->nlh->nlmsg_seq, | |
1932 | RTM_NEWNETCONF, NLM_F_MULTI, | |
7b46a644 | 1933 | -1) < 0) |
7a674200 ND |
1934 | goto done; |
1935 | else | |
1936 | h++; | |
1937 | } | |
1938 | if (h == NETDEV_HASHENTRIES + 1) { | |
1939 | if (inet_netconf_fill_devconf(skb, NETCONFA_IFINDEX_DEFAULT, | |
1940 | net->ipv4.devconf_dflt, | |
1941 | NETLINK_CB(cb->skb).portid, | |
1942 | cb->nlh->nlmsg_seq, | |
1943 | RTM_NEWNETCONF, NLM_F_MULTI, | |
7b46a644 | 1944 | -1) < 0) |
7a674200 ND |
1945 | goto done; |
1946 | else | |
1947 | h++; | |
1948 | } | |
1949 | done: | |
1950 | cb->args[0] = h; | |
1951 | cb->args[1] = idx; | |
1952 | ||
1953 | return skb->len; | |
1954 | } | |
1955 | ||
1da177e4 LT |
1956 | #ifdef CONFIG_SYSCTL |
1957 | ||
c0ce9fb3 | 1958 | static void devinet_copy_dflt_conf(struct net *net, int i) |
31be3085 HX |
1959 | { |
1960 | struct net_device *dev; | |
1961 | ||
c6d14c84 ED |
1962 | rcu_read_lock(); |
1963 | for_each_netdev_rcu(net, dev) { | |
31be3085 | 1964 | struct in_device *in_dev; |
c6d14c84 | 1965 | |
31be3085 HX |
1966 | in_dev = __in_dev_get_rcu(dev); |
1967 | if (in_dev && !test_bit(i, in_dev->cnf.state)) | |
9355bbd6 | 1968 | in_dev->cnf.data[i] = net->ipv4.devconf_dflt->data[i]; |
31be3085 | 1969 | } |
c6d14c84 | 1970 | rcu_read_unlock(); |
31be3085 HX |
1971 | } |
1972 | ||
c6d14c84 | 1973 | /* called with RTNL locked */ |
c0ce9fb3 | 1974 | static void inet_forward_change(struct net *net) |
68dd299b PE |
1975 | { |
1976 | struct net_device *dev; | |
586f1211 | 1977 | int on = IPV4_DEVCONF_ALL(net, FORWARDING); |
68dd299b | 1978 | |
586f1211 | 1979 | IPV4_DEVCONF_ALL(net, ACCEPT_REDIRECTS) = !on; |
9355bbd6 | 1980 | IPV4_DEVCONF_DFLT(net, FORWARDING) = on; |
edc9e748 ND |
1981 | inet_netconf_notify_devconf(net, NETCONFA_FORWARDING, |
1982 | NETCONFA_IFINDEX_ALL, | |
1983 | net->ipv4.devconf_all); | |
1984 | inet_netconf_notify_devconf(net, NETCONFA_FORWARDING, | |
1985 | NETCONFA_IFINDEX_DEFAULT, | |
1986 | net->ipv4.devconf_dflt); | |
68dd299b | 1987 | |
c0ce9fb3 | 1988 | for_each_netdev(net, dev) { |
68dd299b | 1989 | struct in_device *in_dev; |
0187bdfb BH |
1990 | if (on) |
1991 | dev_disable_lro(dev); | |
68dd299b PE |
1992 | rcu_read_lock(); |
1993 | in_dev = __in_dev_get_rcu(dev); | |
edc9e748 | 1994 | if (in_dev) { |
68dd299b | 1995 | IN_DEV_CONF_SET(in_dev, FORWARDING, on); |
edc9e748 ND |
1996 | inet_netconf_notify_devconf(net, NETCONFA_FORWARDING, |
1997 | dev->ifindex, &in_dev->cnf); | |
1998 | } | |
68dd299b PE |
1999 | rcu_read_unlock(); |
2000 | } | |
68dd299b PE |
2001 | } |
2002 | ||
f085ff1c | 2003 | static int devinet_conf_ifindex(struct net *net, struct ipv4_devconf *cnf) |
2004 | { | |
2005 | if (cnf == net->ipv4.devconf_dflt) | |
2006 | return NETCONFA_IFINDEX_DEFAULT; | |
2007 | else if (cnf == net->ipv4.devconf_all) | |
2008 | return NETCONFA_IFINDEX_ALL; | |
2009 | else { | |
2010 | struct in_device *idev | |
2011 | = container_of(cnf, struct in_device, cnf); | |
2012 | return idev->dev->ifindex; | |
2013 | } | |
2014 | } | |
2015 | ||
fe2c6338 | 2016 | static int devinet_conf_proc(struct ctl_table *ctl, int write, |
8d65af78 | 2017 | void __user *buffer, |
31be3085 HX |
2018 | size_t *lenp, loff_t *ppos) |
2019 | { | |
d01ff0a0 | 2020 | int old_value = *(int *)ctl->data; |
8d65af78 | 2021 | int ret = proc_dointvec(ctl, write, buffer, lenp, ppos); |
d01ff0a0 | 2022 | int new_value = *(int *)ctl->data; |
31be3085 HX |
2023 | |
2024 | if (write) { | |
2025 | struct ipv4_devconf *cnf = ctl->extra1; | |
c0ce9fb3 | 2026 | struct net *net = ctl->extra2; |
31be3085 | 2027 | int i = (int *)ctl->data - cnf->data; |
f085ff1c | 2028 | int ifindex; |
31be3085 HX |
2029 | |
2030 | set_bit(i, cnf->state); | |
2031 | ||
9355bbd6 | 2032 | if (cnf == net->ipv4.devconf_dflt) |
c0ce9fb3 | 2033 | devinet_copy_dflt_conf(net, i); |
d0daebc3 TG |
2034 | if (i == IPV4_DEVCONF_ACCEPT_LOCAL - 1 || |
2035 | i == IPV4_DEVCONF_ROUTE_LOCALNET - 1) | |
d01ff0a0 | 2036 | if ((new_value == 0) && (old_value != 0)) |
4ccfe6d4 | 2037 | rt_cache_flush(net); |
f085ff1c | 2038 | |
cc535dfb ND |
2039 | if (i == IPV4_DEVCONF_RP_FILTER - 1 && |
2040 | new_value != old_value) { | |
f085ff1c | 2041 | ifindex = devinet_conf_ifindex(net, cnf); |
cc535dfb ND |
2042 | inet_netconf_notify_devconf(net, NETCONFA_RP_FILTER, |
2043 | ifindex, cnf); | |
2044 | } | |
f085ff1c | 2045 | if (i == IPV4_DEVCONF_PROXY_ARP - 1 && |
2046 | new_value != old_value) { | |
2047 | ifindex = devinet_conf_ifindex(net, cnf); | |
09aea5df | 2048 | inet_netconf_notify_devconf(net, NETCONFA_PROXY_NEIGH, |
f085ff1c | 2049 | ifindex, cnf); |
2050 | } | |
31be3085 HX |
2051 | } |
2052 | ||
2053 | return ret; | |
2054 | } | |
2055 | ||
fe2c6338 | 2056 | static int devinet_sysctl_forward(struct ctl_table *ctl, int write, |
8d65af78 | 2057 | void __user *buffer, |
1da177e4 LT |
2058 | size_t *lenp, loff_t *ppos) |
2059 | { | |
2060 | int *valp = ctl->data; | |
2061 | int val = *valp; | |
88af182e | 2062 | loff_t pos = *ppos; |
8d65af78 | 2063 | int ret = proc_dointvec(ctl, write, buffer, lenp, ppos); |
1da177e4 LT |
2064 | |
2065 | if (write && *valp != val) { | |
c0ce9fb3 PE |
2066 | struct net *net = ctl->extra2; |
2067 | ||
0187bdfb | 2068 | if (valp != &IPV4_DEVCONF_DFLT(net, FORWARDING)) { |
88af182e EB |
2069 | if (!rtnl_trylock()) { |
2070 | /* Restore the original values before restarting */ | |
2071 | *valp = val; | |
2072 | *ppos = pos; | |
9b8adb5e | 2073 | return restart_syscall(); |
88af182e | 2074 | } |
0187bdfb BH |
2075 | if (valp == &IPV4_DEVCONF_ALL(net, FORWARDING)) { |
2076 | inet_forward_change(net); | |
edc9e748 | 2077 | } else { |
0187bdfb BH |
2078 | struct ipv4_devconf *cnf = ctl->extra1; |
2079 | struct in_device *idev = | |
2080 | container_of(cnf, struct in_device, cnf); | |
edc9e748 ND |
2081 | if (*valp) |
2082 | dev_disable_lro(idev->dev); | |
2083 | inet_netconf_notify_devconf(net, | |
2084 | NETCONFA_FORWARDING, | |
2085 | idev->dev->ifindex, | |
2086 | cnf); | |
0187bdfb BH |
2087 | } |
2088 | rtnl_unlock(); | |
4ccfe6d4 | 2089 | rt_cache_flush(net); |
edc9e748 ND |
2090 | } else |
2091 | inet_netconf_notify_devconf(net, NETCONFA_FORWARDING, | |
2092 | NETCONFA_IFINDEX_DEFAULT, | |
2093 | net->ipv4.devconf_dflt); | |
1da177e4 LT |
2094 | } |
2095 | ||
2096 | return ret; | |
2097 | } | |
2098 | ||
fe2c6338 | 2099 | static int ipv4_doint_and_flush(struct ctl_table *ctl, int write, |
323e126f DM |
2100 | void __user *buffer, |
2101 | size_t *lenp, loff_t *ppos) | |
1da177e4 LT |
2102 | { |
2103 | int *valp = ctl->data; | |
2104 | int val = *valp; | |
8d65af78 | 2105 | int ret = proc_dointvec(ctl, write, buffer, lenp, ppos); |
76e6ebfb | 2106 | struct net *net = ctl->extra2; |
1da177e4 LT |
2107 | |
2108 | if (write && *valp != val) | |
4ccfe6d4 | 2109 | rt_cache_flush(net); |
1da177e4 LT |
2110 | |
2111 | return ret; | |
2112 | } | |
2113 | ||
f8572d8f | 2114 | #define DEVINET_SYSCTL_ENTRY(attr, name, mval, proc) \ |
42f811b8 | 2115 | { \ |
42f811b8 HX |
2116 | .procname = name, \ |
2117 | .data = ipv4_devconf.data + \ | |
02291680 | 2118 | IPV4_DEVCONF_ ## attr - 1, \ |
42f811b8 HX |
2119 | .maxlen = sizeof(int), \ |
2120 | .mode = mval, \ | |
2121 | .proc_handler = proc, \ | |
31be3085 | 2122 | .extra1 = &ipv4_devconf, \ |
42f811b8 HX |
2123 | } |
2124 | ||
2125 | #define DEVINET_SYSCTL_RW_ENTRY(attr, name) \ | |
f8572d8f | 2126 | DEVINET_SYSCTL_ENTRY(attr, name, 0644, devinet_conf_proc) |
42f811b8 HX |
2127 | |
2128 | #define DEVINET_SYSCTL_RO_ENTRY(attr, name) \ | |
f8572d8f | 2129 | DEVINET_SYSCTL_ENTRY(attr, name, 0444, devinet_conf_proc) |
42f811b8 | 2130 | |
f8572d8f EB |
2131 | #define DEVINET_SYSCTL_COMPLEX_ENTRY(attr, name, proc) \ |
2132 | DEVINET_SYSCTL_ENTRY(attr, name, 0644, proc) | |
42f811b8 HX |
2133 | |
2134 | #define DEVINET_SYSCTL_FLUSHING_ENTRY(attr, name) \ | |
f8572d8f | 2135 | DEVINET_SYSCTL_COMPLEX_ENTRY(attr, name, ipv4_doint_and_flush) |
42f811b8 | 2136 | |
1da177e4 LT |
2137 | static struct devinet_sysctl_table { |
2138 | struct ctl_table_header *sysctl_header; | |
02291680 | 2139 | struct ctl_table devinet_vars[__IPV4_DEVCONF_MAX]; |
1da177e4 LT |
2140 | } devinet_sysctl = { |
2141 | .devinet_vars = { | |
42f811b8 | 2142 | DEVINET_SYSCTL_COMPLEX_ENTRY(FORWARDING, "forwarding", |
f8572d8f | 2143 | devinet_sysctl_forward), |
42f811b8 HX |
2144 | DEVINET_SYSCTL_RO_ENTRY(MC_FORWARDING, "mc_forwarding"), |
2145 | ||
2146 | DEVINET_SYSCTL_RW_ENTRY(ACCEPT_REDIRECTS, "accept_redirects"), | |
2147 | DEVINET_SYSCTL_RW_ENTRY(SECURE_REDIRECTS, "secure_redirects"), | |
2148 | DEVINET_SYSCTL_RW_ENTRY(SHARED_MEDIA, "shared_media"), | |
2149 | DEVINET_SYSCTL_RW_ENTRY(RP_FILTER, "rp_filter"), | |
2150 | DEVINET_SYSCTL_RW_ENTRY(SEND_REDIRECTS, "send_redirects"), | |
2151 | DEVINET_SYSCTL_RW_ENTRY(ACCEPT_SOURCE_ROUTE, | |
2152 | "accept_source_route"), | |
8153a10c | 2153 | DEVINET_SYSCTL_RW_ENTRY(ACCEPT_LOCAL, "accept_local"), |
28f6aeea | 2154 | DEVINET_SYSCTL_RW_ENTRY(SRC_VMARK, "src_valid_mark"), |
42f811b8 HX |
2155 | DEVINET_SYSCTL_RW_ENTRY(PROXY_ARP, "proxy_arp"), |
2156 | DEVINET_SYSCTL_RW_ENTRY(MEDIUM_ID, "medium_id"), | |
2157 | DEVINET_SYSCTL_RW_ENTRY(BOOTP_RELAY, "bootp_relay"), | |
2158 | DEVINET_SYSCTL_RW_ENTRY(LOG_MARTIANS, "log_martians"), | |
2159 | DEVINET_SYSCTL_RW_ENTRY(TAG, "tag"), | |
2160 | DEVINET_SYSCTL_RW_ENTRY(ARPFILTER, "arp_filter"), | |
2161 | DEVINET_SYSCTL_RW_ENTRY(ARP_ANNOUNCE, "arp_announce"), | |
2162 | DEVINET_SYSCTL_RW_ENTRY(ARP_IGNORE, "arp_ignore"), | |
2163 | DEVINET_SYSCTL_RW_ENTRY(ARP_ACCEPT, "arp_accept"), | |
eefef1cf | 2164 | DEVINET_SYSCTL_RW_ENTRY(ARP_NOTIFY, "arp_notify"), |
65324144 | 2165 | DEVINET_SYSCTL_RW_ENTRY(PROXY_ARP_PVLAN, "proxy_arp_pvlan"), |
5c6fe01c WM |
2166 | DEVINET_SYSCTL_RW_ENTRY(FORCE_IGMP_VERSION, |
2167 | "force_igmp_version"), | |
2690048c WM |
2168 | DEVINET_SYSCTL_RW_ENTRY(IGMPV2_UNSOLICITED_REPORT_INTERVAL, |
2169 | "igmpv2_unsolicited_report_interval"), | |
2170 | DEVINET_SYSCTL_RW_ENTRY(IGMPV3_UNSOLICITED_REPORT_INTERVAL, | |
2171 | "igmpv3_unsolicited_report_interval"), | |
42f811b8 HX |
2172 | |
2173 | DEVINET_SYSCTL_FLUSHING_ENTRY(NOXFRM, "disable_xfrm"), | |
2174 | DEVINET_SYSCTL_FLUSHING_ENTRY(NOPOLICY, "disable_policy"), | |
42f811b8 HX |
2175 | DEVINET_SYSCTL_FLUSHING_ENTRY(PROMOTE_SECONDARIES, |
2176 | "promote_secondaries"), | |
d0daebc3 TG |
2177 | DEVINET_SYSCTL_FLUSHING_ENTRY(ROUTE_LOCALNET, |
2178 | "route_localnet"), | |
1da177e4 | 2179 | }, |
1da177e4 LT |
2180 | }; |
2181 | ||
ea40b324 | 2182 | static int __devinet_sysctl_register(struct net *net, char *dev_name, |
f8572d8f | 2183 | struct ipv4_devconf *p) |
1da177e4 LT |
2184 | { |
2185 | int i; | |
9fa89642 | 2186 | struct devinet_sysctl_table *t; |
8607ddb8 | 2187 | char path[sizeof("net/ipv4/conf/") + IFNAMSIZ]; |
bfada697 | 2188 | |
9fa89642 | 2189 | t = kmemdup(&devinet_sysctl, sizeof(*t), GFP_KERNEL); |
1da177e4 | 2190 | if (!t) |
9fa89642 PE |
2191 | goto out; |
2192 | ||
1da177e4 LT |
2193 | for (i = 0; i < ARRAY_SIZE(t->devinet_vars) - 1; i++) { |
2194 | t->devinet_vars[i].data += (char *)p - (char *)&ipv4_devconf; | |
31be3085 | 2195 | t->devinet_vars[i].extra1 = p; |
c0ce9fb3 | 2196 | t->devinet_vars[i].extra2 = net; |
1da177e4 LT |
2197 | } |
2198 | ||
8607ddb8 | 2199 | snprintf(path, sizeof(path), "net/ipv4/conf/%s", dev_name); |
1da177e4 | 2200 | |
8607ddb8 | 2201 | t->sysctl_header = register_net_sysctl(net, path, t->devinet_vars); |
1da177e4 | 2202 | if (!t->sysctl_header) |
8607ddb8 | 2203 | goto free; |
1da177e4 LT |
2204 | |
2205 | p->sysctl = t; | |
ea40b324 | 2206 | return 0; |
1da177e4 | 2207 | |
9fa89642 | 2208 | free: |
1da177e4 | 2209 | kfree(t); |
9fa89642 | 2210 | out: |
ea40b324 | 2211 | return -ENOBUFS; |
1da177e4 LT |
2212 | } |
2213 | ||
51602b2a PE |
2214 | static void __devinet_sysctl_unregister(struct ipv4_devconf *cnf) |
2215 | { | |
2216 | struct devinet_sysctl_table *t = cnf->sysctl; | |
2217 | ||
2218 | if (t == NULL) | |
2219 | return; | |
2220 | ||
2221 | cnf->sysctl = NULL; | |
ff538818 | 2222 | unregister_net_sysctl_table(t->sysctl_header); |
51602b2a PE |
2223 | kfree(t); |
2224 | } | |
2225 | ||
20e61da7 | 2226 | static int devinet_sysctl_register(struct in_device *idev) |
66f27a52 | 2227 | { |
20e61da7 WC |
2228 | int err; |
2229 | ||
2230 | if (!sysctl_dev_name_is_allowed(idev->dev->name)) | |
2231 | return -EINVAL; | |
2232 | ||
2233 | err = neigh_sysctl_register(idev->dev, idev->arp_parms, NULL); | |
2234 | if (err) | |
2235 | return err; | |
2236 | err = __devinet_sysctl_register(dev_net(idev->dev), idev->dev->name, | |
f8572d8f | 2237 | &idev->cnf); |
20e61da7 WC |
2238 | if (err) |
2239 | neigh_sysctl_unregister(idev->arp_parms); | |
2240 | return err; | |
66f27a52 PE |
2241 | } |
2242 | ||
51602b2a | 2243 | static void devinet_sysctl_unregister(struct in_device *idev) |
1da177e4 | 2244 | { |
51602b2a PE |
2245 | __devinet_sysctl_unregister(&idev->cnf); |
2246 | neigh_sysctl_unregister(idev->arp_parms); | |
1da177e4 | 2247 | } |
1da177e4 | 2248 | |
68dd299b PE |
2249 | static struct ctl_table ctl_forward_entry[] = { |
2250 | { | |
68dd299b PE |
2251 | .procname = "ip_forward", |
2252 | .data = &ipv4_devconf.data[ | |
02291680 | 2253 | IPV4_DEVCONF_FORWARDING - 1], |
68dd299b PE |
2254 | .maxlen = sizeof(int), |
2255 | .mode = 0644, | |
2256 | .proc_handler = devinet_sysctl_forward, | |
68dd299b | 2257 | .extra1 = &ipv4_devconf, |
c0ce9fb3 | 2258 | .extra2 = &init_net, |
68dd299b PE |
2259 | }, |
2260 | { }, | |
2261 | }; | |
2a75de0c | 2262 | #endif |
68dd299b | 2263 | |
752d14dc PE |
2264 | static __net_init int devinet_init_net(struct net *net) |
2265 | { | |
2266 | int err; | |
752d14dc | 2267 | struct ipv4_devconf *all, *dflt; |
2a75de0c ED |
2268 | #ifdef CONFIG_SYSCTL |
2269 | struct ctl_table *tbl = ctl_forward_entry; | |
752d14dc | 2270 | struct ctl_table_header *forw_hdr; |
2a75de0c | 2271 | #endif |
752d14dc PE |
2272 | |
2273 | err = -ENOMEM; | |
2274 | all = &ipv4_devconf; | |
2275 | dflt = &ipv4_devconf_dflt; | |
752d14dc | 2276 | |
09ad9bc7 | 2277 | if (!net_eq(net, &init_net)) { |
752d14dc PE |
2278 | all = kmemdup(all, sizeof(ipv4_devconf), GFP_KERNEL); |
2279 | if (all == NULL) | |
2280 | goto err_alloc_all; | |
2281 | ||
2282 | dflt = kmemdup(dflt, sizeof(ipv4_devconf_dflt), GFP_KERNEL); | |
2283 | if (dflt == NULL) | |
2284 | goto err_alloc_dflt; | |
2285 | ||
2a75de0c | 2286 | #ifdef CONFIG_SYSCTL |
752d14dc PE |
2287 | tbl = kmemdup(tbl, sizeof(ctl_forward_entry), GFP_KERNEL); |
2288 | if (tbl == NULL) | |
2289 | goto err_alloc_ctl; | |
2290 | ||
02291680 | 2291 | tbl[0].data = &all->data[IPV4_DEVCONF_FORWARDING - 1]; |
752d14dc PE |
2292 | tbl[0].extra1 = all; |
2293 | tbl[0].extra2 = net; | |
2a75de0c | 2294 | #endif |
752d14dc PE |
2295 | } |
2296 | ||
2297 | #ifdef CONFIG_SYSCTL | |
f8572d8f | 2298 | err = __devinet_sysctl_register(net, "all", all); |
752d14dc PE |
2299 | if (err < 0) |
2300 | goto err_reg_all; | |
2301 | ||
f8572d8f | 2302 | err = __devinet_sysctl_register(net, "default", dflt); |
752d14dc PE |
2303 | if (err < 0) |
2304 | goto err_reg_dflt; | |
2305 | ||
2306 | err = -ENOMEM; | |
8607ddb8 | 2307 | forw_hdr = register_net_sysctl(net, "net/ipv4", tbl); |
752d14dc PE |
2308 | if (forw_hdr == NULL) |
2309 | goto err_reg_ctl; | |
2a75de0c | 2310 | net->ipv4.forw_hdr = forw_hdr; |
752d14dc PE |
2311 | #endif |
2312 | ||
752d14dc PE |
2313 | net->ipv4.devconf_all = all; |
2314 | net->ipv4.devconf_dflt = dflt; | |
2315 | return 0; | |
2316 | ||
2317 | #ifdef CONFIG_SYSCTL | |
2318 | err_reg_ctl: | |
2319 | __devinet_sysctl_unregister(dflt); | |
2320 | err_reg_dflt: | |
2321 | __devinet_sysctl_unregister(all); | |
2322 | err_reg_all: | |
2323 | if (tbl != ctl_forward_entry) | |
2324 | kfree(tbl); | |
752d14dc | 2325 | err_alloc_ctl: |
2a75de0c | 2326 | #endif |
752d14dc PE |
2327 | if (dflt != &ipv4_devconf_dflt) |
2328 | kfree(dflt); | |
2329 | err_alloc_dflt: | |
2330 | if (all != &ipv4_devconf) | |
2331 | kfree(all); | |
2332 | err_alloc_all: | |
2333 | return err; | |
2334 | } | |
2335 | ||
2336 | static __net_exit void devinet_exit_net(struct net *net) | |
2337 | { | |
2a75de0c | 2338 | #ifdef CONFIG_SYSCTL |
752d14dc PE |
2339 | struct ctl_table *tbl; |
2340 | ||
2341 | tbl = net->ipv4.forw_hdr->ctl_table_arg; | |
752d14dc PE |
2342 | unregister_net_sysctl_table(net->ipv4.forw_hdr); |
2343 | __devinet_sysctl_unregister(net->ipv4.devconf_dflt); | |
2344 | __devinet_sysctl_unregister(net->ipv4.devconf_all); | |
752d14dc | 2345 | kfree(tbl); |
2a75de0c | 2346 | #endif |
752d14dc PE |
2347 | kfree(net->ipv4.devconf_dflt); |
2348 | kfree(net->ipv4.devconf_all); | |
2349 | } | |
2350 | ||
2351 | static __net_initdata struct pernet_operations devinet_ops = { | |
2352 | .init = devinet_init_net, | |
2353 | .exit = devinet_exit_net, | |
2354 | }; | |
2355 | ||
207895fd | 2356 | static struct rtnl_af_ops inet_af_ops __read_mostly = { |
9f0f7272 TG |
2357 | .family = AF_INET, |
2358 | .fill_link_af = inet_fill_link_af, | |
2359 | .get_link_af_size = inet_get_link_af_size, | |
cf7afbfe TG |
2360 | .validate_link_af = inet_validate_link_af, |
2361 | .set_link_af = inet_set_link_af, | |
9f0f7272 TG |
2362 | }; |
2363 | ||
1da177e4 LT |
2364 | void __init devinet_init(void) |
2365 | { | |
fd23c3b3 DM |
2366 | int i; |
2367 | ||
2368 | for (i = 0; i < IN4_ADDR_HSIZE; i++) | |
2369 | INIT_HLIST_HEAD(&inet_addr_lst[i]); | |
2370 | ||
752d14dc PE |
2371 | register_pernet_subsys(&devinet_ops); |
2372 | ||
1da177e4 LT |
2373 | register_gifconf(PF_INET, inet_gifconf); |
2374 | register_netdevice_notifier(&ip_netdev_notifier); | |
63f3444f | 2375 | |
906e073f | 2376 | queue_delayed_work(system_power_efficient_wq, &check_lifetime_work, 0); |
5c766d64 | 2377 | |
9f0f7272 TG |
2378 | rtnl_af_register(&inet_af_ops); |
2379 | ||
c7ac8679 GR |
2380 | rtnl_register(PF_INET, RTM_NEWADDR, inet_rtm_newaddr, NULL, NULL); |
2381 | rtnl_register(PF_INET, RTM_DELADDR, inet_rtm_deladdr, NULL, NULL); | |
2382 | rtnl_register(PF_INET, RTM_GETADDR, NULL, inet_dump_ifaddr, NULL); | |
9e551110 | 2383 | rtnl_register(PF_INET, RTM_GETNETCONF, inet_netconf_get_devconf, |
7a674200 | 2384 | inet_netconf_dump_devconf, NULL); |
1da177e4 LT |
2385 | } |
2386 |