Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * INET An implementation of the TCP/IP protocol suite for the LINUX | |
3 | * operating system. INET is implemented using the BSD Socket | |
4 | * interface as the means of communication with the user level. | |
5 | * | |
6 | * IPv4 Forwarding Information Base: FIB frontend. | |
7 | * | |
1da177e4 LT |
8 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> |
9 | * | |
10 | * This program is free software; you can redistribute it and/or | |
11 | * modify it under the terms of the GNU General Public License | |
12 | * as published by the Free Software Foundation; either version | |
13 | * 2 of the License, or (at your option) any later version. | |
14 | */ | |
15 | ||
1da177e4 LT |
16 | #include <linux/module.h> |
17 | #include <asm/uaccess.h> | |
1da177e4 | 18 | #include <linux/bitops.h> |
4fc268d2 | 19 | #include <linux/capability.h> |
1da177e4 LT |
20 | #include <linux/types.h> |
21 | #include <linux/kernel.h> | |
1da177e4 LT |
22 | #include <linux/mm.h> |
23 | #include <linux/string.h> | |
24 | #include <linux/socket.h> | |
25 | #include <linux/sockios.h> | |
26 | #include <linux/errno.h> | |
27 | #include <linux/in.h> | |
28 | #include <linux/inet.h> | |
14c85021 | 29 | #include <linux/inetdevice.h> |
1da177e4 | 30 | #include <linux/netdevice.h> |
1823730f | 31 | #include <linux/if_addr.h> |
1da177e4 LT |
32 | #include <linux/if_arp.h> |
33 | #include <linux/skbuff.h> | |
7a9bc9b8 | 34 | #include <linux/cache.h> |
1da177e4 | 35 | #include <linux/init.h> |
1af5a8c4 | 36 | #include <linux/list.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
1da177e4 LT |
38 | |
39 | #include <net/ip.h> | |
40 | #include <net/protocol.h> | |
41 | #include <net/route.h> | |
42 | #include <net/tcp.h> | |
43 | #include <net/sock.h> | |
1da177e4 LT |
44 | #include <net/arp.h> |
45 | #include <net/ip_fib.h> | |
63f3444f | 46 | #include <net/rtnetlink.h> |
990078af | 47 | #include <net/xfrm.h> |
1da177e4 | 48 | |
1da177e4 LT |
49 | #ifndef CONFIG_IP_MULTIPLE_TABLES |
50 | ||
7b1a74fd | 51 | static int __net_init fib4_rules_init(struct net *net) |
c3e9a353 | 52 | { |
93456b6d DL |
53 | struct fib_table *local_table, *main_table; |
54 | ||
5348ba85 | 55 | local_table = fib_trie_table(RT_TABLE_LOCAL); |
93456b6d | 56 | if (local_table == NULL) |
dbb50165 DL |
57 | return -ENOMEM; |
58 | ||
5348ba85 | 59 | main_table = fib_trie_table(RT_TABLE_MAIN); |
93456b6d | 60 | if (main_table == NULL) |
dbb50165 DL |
61 | goto fail; |
62 | ||
93456b6d | 63 | hlist_add_head_rcu(&local_table->tb_hlist, |
e4aef8ae | 64 | &net->ipv4.fib_table_hash[TABLE_LOCAL_INDEX]); |
93456b6d | 65 | hlist_add_head_rcu(&main_table->tb_hlist, |
e4aef8ae | 66 | &net->ipv4.fib_table_hash[TABLE_MAIN_INDEX]); |
dbb50165 DL |
67 | return 0; |
68 | ||
69 | fail: | |
93456b6d | 70 | kfree(local_table); |
dbb50165 | 71 | return -ENOMEM; |
c3e9a353 | 72 | } |
1af5a8c4 | 73 | #else |
1da177e4 | 74 | |
8ad4942c | 75 | struct fib_table *fib_new_table(struct net *net, u32 id) |
1da177e4 LT |
76 | { |
77 | struct fib_table *tb; | |
1af5a8c4 | 78 | unsigned int h; |
1da177e4 | 79 | |
1af5a8c4 PM |
80 | if (id == 0) |
81 | id = RT_TABLE_MAIN; | |
8ad4942c | 82 | tb = fib_get_table(net, id); |
1af5a8c4 PM |
83 | if (tb) |
84 | return tb; | |
7f9b8052 | 85 | |
5348ba85 | 86 | tb = fib_trie_table(id); |
1da177e4 LT |
87 | if (!tb) |
88 | return NULL; | |
f4530fa5 DM |
89 | |
90 | switch (id) { | |
91 | case RT_TABLE_LOCAL: | |
92 | net->ipv4.fib_local = tb; | |
93 | break; | |
94 | ||
95 | case RT_TABLE_MAIN: | |
96 | net->ipv4.fib_main = tb; | |
97 | break; | |
98 | ||
99 | case RT_TABLE_DEFAULT: | |
100 | net->ipv4.fib_default = tb; | |
101 | break; | |
102 | ||
103 | default: | |
104 | break; | |
105 | } | |
106 | ||
1af5a8c4 | 107 | h = id & (FIB_TABLE_HASHSZ - 1); |
e4aef8ae | 108 | hlist_add_head_rcu(&tb->tb_hlist, &net->ipv4.fib_table_hash[h]); |
1da177e4 LT |
109 | return tb; |
110 | } | |
111 | ||
8ad4942c | 112 | struct fib_table *fib_get_table(struct net *net, u32 id) |
1af5a8c4 PM |
113 | { |
114 | struct fib_table *tb; | |
e4aef8ae | 115 | struct hlist_head *head; |
1af5a8c4 | 116 | unsigned int h; |
1da177e4 | 117 | |
1af5a8c4 PM |
118 | if (id == 0) |
119 | id = RT_TABLE_MAIN; | |
120 | h = id & (FIB_TABLE_HASHSZ - 1); | |
e4aef8ae | 121 | |
1af5a8c4 | 122 | rcu_read_lock(); |
e4aef8ae | 123 | head = &net->ipv4.fib_table_hash[h]; |
b67bfe0d | 124 | hlist_for_each_entry_rcu(tb, head, tb_hlist) { |
1af5a8c4 PM |
125 | if (tb->tb_id == id) { |
126 | rcu_read_unlock(); | |
127 | return tb; | |
128 | } | |
129 | } | |
130 | rcu_read_unlock(); | |
131 | return NULL; | |
132 | } | |
1da177e4 LT |
133 | #endif /* CONFIG_IP_MULTIPLE_TABLES */ |
134 | ||
e4aef8ae | 135 | static void fib_flush(struct net *net) |
1da177e4 LT |
136 | { |
137 | int flushed = 0; | |
1da177e4 | 138 | struct fib_table *tb; |
e4aef8ae | 139 | struct hlist_head *head; |
1af5a8c4 | 140 | unsigned int h; |
1da177e4 | 141 | |
1af5a8c4 | 142 | for (h = 0; h < FIB_TABLE_HASHSZ; h++) { |
e4aef8ae | 143 | head = &net->ipv4.fib_table_hash[h]; |
b67bfe0d | 144 | hlist_for_each_entry(tb, head, tb_hlist) |
16c6cf8b | 145 | flushed += fib_table_flush(tb); |
1da177e4 | 146 | } |
1da177e4 LT |
147 | |
148 | if (flushed) | |
4ccfe6d4 | 149 | rt_cache_flush(net); |
1da177e4 LT |
150 | } |
151 | ||
05538116 LAT |
152 | /* |
153 | * Find address type as if only "dev" was present in the system. If | |
154 | * on_dev is NULL then all interfaces are taken into consideration. | |
155 | */ | |
95c96174 ED |
156 | static inline unsigned int __inet_dev_addr_type(struct net *net, |
157 | const struct net_device *dev, | |
158 | __be32 addr) | |
1da177e4 | 159 | { |
9ade2286 | 160 | struct flowi4 fl4 = { .daddr = addr }; |
1da177e4 | 161 | struct fib_result res; |
95c96174 | 162 | unsigned int ret = RTN_BROADCAST; |
03cf786c | 163 | struct fib_table *local_table; |
1da177e4 | 164 | |
1e637c74 | 165 | if (ipv4_is_zeronet(addr) || ipv4_is_lbcast(addr)) |
1da177e4 | 166 | return RTN_BROADCAST; |
f97c1e0c | 167 | if (ipv4_is_multicast(addr)) |
1da177e4 LT |
168 | return RTN_MULTICAST; |
169 | ||
6b175b26 | 170 | local_table = fib_get_table(net, RT_TABLE_LOCAL); |
03cf786c | 171 | if (local_table) { |
1da177e4 | 172 | ret = RTN_UNICAST; |
ebc0ffae | 173 | rcu_read_lock(); |
9ade2286 | 174 | if (!fib_table_lookup(local_table, &fl4, &res, FIB_LOOKUP_NOREF)) { |
05538116 LAT |
175 | if (!dev || dev == res.fi->fib_dev) |
176 | ret = res.type; | |
1da177e4 | 177 | } |
ebc0ffae | 178 | rcu_read_unlock(); |
1da177e4 LT |
179 | } |
180 | return ret; | |
181 | } | |
182 | ||
6b175b26 | 183 | unsigned int inet_addr_type(struct net *net, __be32 addr) |
05538116 | 184 | { |
6b175b26 | 185 | return __inet_dev_addr_type(net, NULL, addr); |
05538116 | 186 | } |
4bc2f18b | 187 | EXPORT_SYMBOL(inet_addr_type); |
05538116 | 188 | |
6b175b26 EB |
189 | unsigned int inet_dev_addr_type(struct net *net, const struct net_device *dev, |
190 | __be32 addr) | |
05538116 | 191 | { |
6a31d2a9 | 192 | return __inet_dev_addr_type(net, dev, addr); |
05538116 | 193 | } |
4bc2f18b | 194 | EXPORT_SYMBOL(inet_dev_addr_type); |
05538116 | 195 | |
35ebf65e DM |
196 | __be32 fib_compute_spec_dst(struct sk_buff *skb) |
197 | { | |
198 | struct net_device *dev = skb->dev; | |
199 | struct in_device *in_dev; | |
200 | struct fib_result res; | |
a207a4b2 | 201 | struct rtable *rt; |
35ebf65e DM |
202 | struct flowi4 fl4; |
203 | struct net *net; | |
a207a4b2 | 204 | int scope; |
35ebf65e | 205 | |
a207a4b2 | 206 | rt = skb_rtable(skb); |
0cc535a2 JA |
207 | if ((rt->rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST | RTCF_LOCAL)) == |
208 | RTCF_LOCAL) | |
35ebf65e DM |
209 | return ip_hdr(skb)->daddr; |
210 | ||
211 | in_dev = __in_dev_get_rcu(dev); | |
212 | BUG_ON(!in_dev); | |
35ebf65e DM |
213 | |
214 | net = dev_net(dev); | |
a207a4b2 DM |
215 | |
216 | scope = RT_SCOPE_UNIVERSE; | |
217 | if (!ipv4_is_zeronet(ip_hdr(skb)->saddr)) { | |
218 | fl4.flowi4_oif = 0; | |
1fb9489b | 219 | fl4.flowi4_iif = LOOPBACK_IFINDEX; |
a207a4b2 DM |
220 | fl4.daddr = ip_hdr(skb)->saddr; |
221 | fl4.saddr = 0; | |
222 | fl4.flowi4_tos = RT_TOS(ip_hdr(skb)->tos); | |
223 | fl4.flowi4_scope = scope; | |
224 | fl4.flowi4_mark = IN_DEV_SRC_VMARK(in_dev) ? skb->mark : 0; | |
225 | if (!fib_lookup(net, &fl4, &res)) | |
226 | return FIB_RES_PREFSRC(net, res); | |
227 | } else { | |
228 | scope = RT_SCOPE_LINK; | |
229 | } | |
230 | ||
231 | return inet_select_addr(dev, ip_hdr(skb)->saddr, scope); | |
35ebf65e DM |
232 | } |
233 | ||
1da177e4 | 234 | /* Given (packet source, input interface) and optional (dst, oif, tos): |
6a31d2a9 ED |
235 | * - (main) check, that source is valid i.e. not broadcast or our local |
236 | * address. | |
237 | * - figure out what "logical" interface this packet arrived | |
238 | * and calculate "specific destination" address. | |
239 | * - check, that packet arrived from expected physical interface. | |
ebc0ffae | 240 | * called with rcu_read_lock() |
1da177e4 | 241 | */ |
7a9bc9b8 DM |
242 | static int __fib_validate_source(struct sk_buff *skb, __be32 src, __be32 dst, |
243 | u8 tos, int oif, struct net_device *dev, | |
244 | int rpf, struct in_device *idev, u32 *itag) | |
1da177e4 | 245 | { |
7a9bc9b8 | 246 | int ret, no_addr, accept_local; |
1da177e4 | 247 | struct fib_result res; |
9e56e380 | 248 | struct flowi4 fl4; |
5b707aaa | 249 | struct net *net; |
9e56e380 | 250 | bool dev_match; |
1da177e4 | 251 | |
9ade2286 DM |
252 | fl4.flowi4_oif = 0; |
253 | fl4.flowi4_iif = oif; | |
9ade2286 DM |
254 | fl4.daddr = src; |
255 | fl4.saddr = dst; | |
256 | fl4.flowi4_tos = tos; | |
257 | fl4.flowi4_scope = RT_SCOPE_UNIVERSE; | |
cc7e17ea | 258 | |
9e56e380 | 259 | no_addr = idev->ifa_list == NULL; |
990078af | 260 | |
9e56e380 DM |
261 | accept_local = IN_DEV_ACCEPT_LOCAL(idev); |
262 | fl4.flowi4_mark = IN_DEV_SRC_VMARK(idev) ? skb->mark : 0; | |
1da177e4 | 263 | |
c346dca1 | 264 | net = dev_net(dev); |
9ade2286 | 265 | if (fib_lookup(net, &fl4, &res)) |
1da177e4 | 266 | goto last_resort; |
8153a10c PM |
267 | if (res.type != RTN_UNICAST) { |
268 | if (res.type != RTN_LOCAL || !accept_local) | |
ebc0ffae | 269 | goto e_inval; |
8153a10c | 270 | } |
1da177e4 | 271 | fib_combine_itag(itag, &res); |
6f86b325 DM |
272 | dev_match = false; |
273 | ||
1da177e4 | 274 | #ifdef CONFIG_IP_ROUTE_MULTIPATH |
6f86b325 DM |
275 | for (ret = 0; ret < res.fi->fib_nhs; ret++) { |
276 | struct fib_nh *nh = &res.fi->fib_nh[ret]; | |
277 | ||
278 | if (nh->nh_dev == dev) { | |
279 | dev_match = true; | |
280 | break; | |
281 | } | |
282 | } | |
1da177e4 LT |
283 | #else |
284 | if (FIB_RES_DEV(res) == dev) | |
6f86b325 | 285 | dev_match = true; |
1da177e4 | 286 | #endif |
6f86b325 | 287 | if (dev_match) { |
1da177e4 | 288 | ret = FIB_RES_NH(res).nh_scope >= RT_SCOPE_HOST; |
1da177e4 LT |
289 | return ret; |
290 | } | |
1da177e4 LT |
291 | if (no_addr) |
292 | goto last_resort; | |
c1cf8422 | 293 | if (rpf == 1) |
b5f7e755 | 294 | goto e_rpf; |
9ade2286 | 295 | fl4.flowi4_oif = dev->ifindex; |
1da177e4 LT |
296 | |
297 | ret = 0; | |
9ade2286 | 298 | if (fib_lookup(net, &fl4, &res) == 0) { |
41347dcd | 299 | if (res.type == RTN_UNICAST) |
1da177e4 | 300 | ret = FIB_RES_NH(res).nh_scope >= RT_SCOPE_HOST; |
1da177e4 LT |
301 | } |
302 | return ret; | |
303 | ||
304 | last_resort: | |
305 | if (rpf) | |
b5f7e755 | 306 | goto e_rpf; |
1da177e4 LT |
307 | *itag = 0; |
308 | return 0; | |
309 | ||
1da177e4 LT |
310 | e_inval: |
311 | return -EINVAL; | |
b5f7e755 ED |
312 | e_rpf: |
313 | return -EXDEV; | |
1da177e4 LT |
314 | } |
315 | ||
7a9bc9b8 DM |
316 | /* Ignore rp_filter for packets protected by IPsec. */ |
317 | int fib_validate_source(struct sk_buff *skb, __be32 src, __be32 dst, | |
318 | u8 tos, int oif, struct net_device *dev, | |
319 | struct in_device *idev, u32 *itag) | |
320 | { | |
321 | int r = secpath_exists(skb) ? 0 : IN_DEV_RPFILTER(idev); | |
322 | ||
e81da0e1 JA |
323 | if (!r && !fib_num_tclassid_users(dev_net(dev)) && |
324 | (dev->ifindex != oif || !IN_DEV_TX_REDIRECTS(idev))) { | |
7a9bc9b8 DM |
325 | *itag = 0; |
326 | return 0; | |
327 | } | |
328 | return __fib_validate_source(skb, src, dst, tos, oif, dev, r, idev, itag); | |
329 | } | |
330 | ||
81f7bf6c | 331 | static inline __be32 sk_extract_addr(struct sockaddr *addr) |
4e902c57 TG |
332 | { |
333 | return ((struct sockaddr_in *) addr)->sin_addr.s_addr; | |
334 | } | |
335 | ||
336 | static int put_rtax(struct nlattr *mx, int len, int type, u32 value) | |
337 | { | |
338 | struct nlattr *nla; | |
339 | ||
340 | nla = (struct nlattr *) ((char *) mx + len); | |
341 | nla->nla_type = type; | |
342 | nla->nla_len = nla_attr_size(4); | |
343 | *(u32 *) nla_data(nla) = value; | |
344 | ||
345 | return len + nla_total_size(4); | |
346 | } | |
347 | ||
4b5d47d4 | 348 | static int rtentry_to_fib_config(struct net *net, int cmd, struct rtentry *rt, |
4e902c57 TG |
349 | struct fib_config *cfg) |
350 | { | |
6d85c10a | 351 | __be32 addr; |
4e902c57 TG |
352 | int plen; |
353 | ||
354 | memset(cfg, 0, sizeof(*cfg)); | |
4b5d47d4 | 355 | cfg->fc_nlinfo.nl_net = net; |
4e902c57 TG |
356 | |
357 | if (rt->rt_dst.sa_family != AF_INET) | |
358 | return -EAFNOSUPPORT; | |
359 | ||
360 | /* | |
361 | * Check mask for validity: | |
362 | * a) it must be contiguous. | |
363 | * b) destination must have all host bits clear. | |
364 | * c) if application forgot to set correct family (AF_INET), | |
365 | * reject request unless it is absolutely clear i.e. | |
366 | * both family and mask are zero. | |
367 | */ | |
368 | plen = 32; | |
369 | addr = sk_extract_addr(&rt->rt_dst); | |
370 | if (!(rt->rt_flags & RTF_HOST)) { | |
81f7bf6c | 371 | __be32 mask = sk_extract_addr(&rt->rt_genmask); |
4e902c57 TG |
372 | |
373 | if (rt->rt_genmask.sa_family != AF_INET) { | |
374 | if (mask || rt->rt_genmask.sa_family) | |
375 | return -EAFNOSUPPORT; | |
376 | } | |
377 | ||
378 | if (bad_mask(mask, addr)) | |
379 | return -EINVAL; | |
380 | ||
381 | plen = inet_mask_len(mask); | |
382 | } | |
383 | ||
384 | cfg->fc_dst_len = plen; | |
385 | cfg->fc_dst = addr; | |
386 | ||
387 | if (cmd != SIOCDELRT) { | |
388 | cfg->fc_nlflags = NLM_F_CREATE; | |
389 | cfg->fc_protocol = RTPROT_BOOT; | |
390 | } | |
391 | ||
392 | if (rt->rt_metric) | |
393 | cfg->fc_priority = rt->rt_metric - 1; | |
394 | ||
395 | if (rt->rt_flags & RTF_REJECT) { | |
396 | cfg->fc_scope = RT_SCOPE_HOST; | |
397 | cfg->fc_type = RTN_UNREACHABLE; | |
398 | return 0; | |
399 | } | |
400 | ||
401 | cfg->fc_scope = RT_SCOPE_NOWHERE; | |
402 | cfg->fc_type = RTN_UNICAST; | |
403 | ||
404 | if (rt->rt_dev) { | |
405 | char *colon; | |
406 | struct net_device *dev; | |
407 | char devname[IFNAMSIZ]; | |
408 | ||
409 | if (copy_from_user(devname, rt->rt_dev, IFNAMSIZ-1)) | |
410 | return -EFAULT; | |
411 | ||
412 | devname[IFNAMSIZ-1] = 0; | |
413 | colon = strchr(devname, ':'); | |
414 | if (colon) | |
415 | *colon = 0; | |
6fa3eb70 S |
416 | #ifdef CONFIG_MTK_NET_LOGGING |
417 | printk(KERN_INFO "[mtk_net][RTlog info] ip_rt_ioctl rt.dev =%s \n",devname); | |
418 | #endif | |
4b5d47d4 | 419 | dev = __dev_get_by_name(net, devname); |
4e902c57 TG |
420 | if (!dev) |
421 | return -ENODEV; | |
422 | cfg->fc_oif = dev->ifindex; | |
423 | if (colon) { | |
424 | struct in_ifaddr *ifa; | |
425 | struct in_device *in_dev = __in_dev_get_rtnl(dev); | |
426 | if (!in_dev) | |
427 | return -ENODEV; | |
428 | *colon = ':'; | |
429 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) | |
430 | if (strcmp(ifa->ifa_label, devname) == 0) | |
431 | break; | |
432 | if (ifa == NULL) | |
433 | return -ENODEV; | |
434 | cfg->fc_prefsrc = ifa->ifa_local; | |
435 | } | |
436 | } | |
437 | ||
438 | addr = sk_extract_addr(&rt->rt_gateway); | |
439 | if (rt->rt_gateway.sa_family == AF_INET && addr) { | |
440 | cfg->fc_gw = addr; | |
441 | if (rt->rt_flags & RTF_GATEWAY && | |
4b5d47d4 | 442 | inet_addr_type(net, addr) == RTN_UNICAST) |
4e902c57 TG |
443 | cfg->fc_scope = RT_SCOPE_UNIVERSE; |
444 | } | |
445 | ||
446 | if (cmd == SIOCDELRT) | |
447 | return 0; | |
448 | ||
449 | if (rt->rt_flags & RTF_GATEWAY && !cfg->fc_gw) | |
450 | return -EINVAL; | |
451 | ||
452 | if (cfg->fc_scope == RT_SCOPE_NOWHERE) | |
453 | cfg->fc_scope = RT_SCOPE_LINK; | |
454 | ||
455 | if (rt->rt_flags & (RTF_MTU | RTF_WINDOW | RTF_IRTT)) { | |
456 | struct nlattr *mx; | |
457 | int len = 0; | |
458 | ||
459 | mx = kzalloc(3 * nla_total_size(4), GFP_KERNEL); | |
e905a9ed | 460 | if (mx == NULL) |
4e902c57 TG |
461 | return -ENOMEM; |
462 | ||
463 | if (rt->rt_flags & RTF_MTU) | |
464 | len = put_rtax(mx, len, RTAX_ADVMSS, rt->rt_mtu - 40); | |
465 | ||
466 | if (rt->rt_flags & RTF_WINDOW) | |
467 | len = put_rtax(mx, len, RTAX_WINDOW, rt->rt_window); | |
468 | ||
469 | if (rt->rt_flags & RTF_IRTT) | |
470 | len = put_rtax(mx, len, RTAX_RTT, rt->rt_irtt << 3); | |
471 | ||
472 | cfg->fc_mx = mx; | |
473 | cfg->fc_mx_len = len; | |
474 | } | |
475 | ||
476 | return 0; | |
477 | } | |
478 | ||
1da177e4 | 479 | /* |
6a31d2a9 ED |
480 | * Handle IP routing ioctl calls. |
481 | * These are used to manipulate the routing tables | |
1da177e4 | 482 | */ |
1bad118a | 483 | int ip_rt_ioctl(struct net *net, unsigned int cmd, void __user *arg) |
1da177e4 | 484 | { |
4e902c57 TG |
485 | struct fib_config cfg; |
486 | struct rtentry rt; | |
1da177e4 | 487 | int err; |
1da177e4 LT |
488 | |
489 | switch (cmd) { | |
490 | case SIOCADDRT: /* Add a route */ | |
491 | case SIOCDELRT: /* Delete a route */ | |
52e804c6 | 492 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 | 493 | return -EPERM; |
4e902c57 TG |
494 | |
495 | if (copy_from_user(&rt, arg, sizeof(rt))) | |
1da177e4 | 496 | return -EFAULT; |
6fa3eb70 S |
497 | #ifdef CONFIG_MTK_NET_LOGGING |
498 | printk(KERN_INFO "[mtk_net][RTlog info]ip_rt_ioctl rt.flags =%08x, rt.rt_dst =%08x rt.rt_gateway =%08x \n",rt.rt_flags,sk_extract_addr(&(rt.rt_dst)),sk_extract_addr(&(rt.rt_gateway))); | |
499 | #endif | |
4e902c57 | 500 | |
1da177e4 | 501 | rtnl_lock(); |
1bad118a | 502 | err = rtentry_to_fib_config(net, cmd, &rt, &cfg); |
1da177e4 | 503 | if (err == 0) { |
4e902c57 TG |
504 | struct fib_table *tb; |
505 | ||
1da177e4 | 506 | if (cmd == SIOCDELRT) { |
6fa3eb70 S |
507 | #ifdef CONFIG_MTK_NET_LOGGING |
508 | printk(KERN_INFO "[mtk_net][RTlog delete] p_rt_ioctl: cmd == SIOCDELRT! >>\n"); | |
509 | #endif | |
1bad118a | 510 | tb = fib_get_table(net, cfg.fc_table); |
1da177e4 | 511 | if (tb) |
16c6cf8b | 512 | err = fib_table_delete(tb, &cfg); |
4e902c57 TG |
513 | else |
514 | err = -ESRCH; | |
1da177e4 | 515 | } else { |
6fa3eb70 S |
516 | #ifdef CONFIG_MTK_NET_LOGGING |
517 | printk(KERN_INFO "[mtk_net][RTlog insert] p_rt_ioctl: cmd == SIOCADDRT! >>\n"); | |
518 | #endif | |
1bad118a | 519 | tb = fib_new_table(net, cfg.fc_table); |
1da177e4 | 520 | if (tb) |
16c6cf8b | 521 | err = fib_table_insert(tb, &cfg); |
4e902c57 TG |
522 | else |
523 | err = -ENOBUFS; | |
1da177e4 | 524 | } |
4e902c57 TG |
525 | |
526 | /* allocated by rtentry_to_fib_config() */ | |
527 | kfree(cfg.fc_mx); | |
1da177e4 LT |
528 | } |
529 | rtnl_unlock(); | |
530 | return err; | |
531 | } | |
532 | return -EINVAL; | |
533 | } | |
534 | ||
6a31d2a9 | 535 | const struct nla_policy rtm_ipv4_policy[RTA_MAX + 1] = { |
4e902c57 TG |
536 | [RTA_DST] = { .type = NLA_U32 }, |
537 | [RTA_SRC] = { .type = NLA_U32 }, | |
538 | [RTA_IIF] = { .type = NLA_U32 }, | |
539 | [RTA_OIF] = { .type = NLA_U32 }, | |
540 | [RTA_GATEWAY] = { .type = NLA_U32 }, | |
541 | [RTA_PRIORITY] = { .type = NLA_U32 }, | |
542 | [RTA_PREFSRC] = { .type = NLA_U32 }, | |
543 | [RTA_METRICS] = { .type = NLA_NESTED }, | |
5176f91e | 544 | [RTA_MULTIPATH] = { .len = sizeof(struct rtnexthop) }, |
4e902c57 | 545 | [RTA_FLOW] = { .type = NLA_U32 }, |
6fa3eb70 | 546 | [RTA_UID] = { .type = NLA_U32 }, |
4e902c57 TG |
547 | }; |
548 | ||
4b5d47d4 | 549 | static int rtm_to_fib_config(struct net *net, struct sk_buff *skb, |
6a31d2a9 | 550 | struct nlmsghdr *nlh, struct fib_config *cfg) |
1da177e4 | 551 | { |
4e902c57 TG |
552 | struct nlattr *attr; |
553 | int err, remaining; | |
554 | struct rtmsg *rtm; | |
555 | ||
556 | err = nlmsg_validate(nlh, sizeof(*rtm), RTA_MAX, rtm_ipv4_policy); | |
557 | if (err < 0) | |
558 | goto errout; | |
559 | ||
560 | memset(cfg, 0, sizeof(*cfg)); | |
561 | ||
562 | rtm = nlmsg_data(nlh); | |
4e902c57 | 563 | cfg->fc_dst_len = rtm->rtm_dst_len; |
4e902c57 TG |
564 | cfg->fc_tos = rtm->rtm_tos; |
565 | cfg->fc_table = rtm->rtm_table; | |
566 | cfg->fc_protocol = rtm->rtm_protocol; | |
567 | cfg->fc_scope = rtm->rtm_scope; | |
568 | cfg->fc_type = rtm->rtm_type; | |
569 | cfg->fc_flags = rtm->rtm_flags; | |
570 | cfg->fc_nlflags = nlh->nlmsg_flags; | |
571 | ||
15e47304 | 572 | cfg->fc_nlinfo.portid = NETLINK_CB(skb).portid; |
4e902c57 | 573 | cfg->fc_nlinfo.nlh = nlh; |
4b5d47d4 | 574 | cfg->fc_nlinfo.nl_net = net; |
4e902c57 | 575 | |
a0ee18b9 TG |
576 | if (cfg->fc_type > RTN_MAX) { |
577 | err = -EINVAL; | |
578 | goto errout; | |
579 | } | |
580 | ||
4e902c57 | 581 | nlmsg_for_each_attr(attr, nlh, sizeof(struct rtmsg), remaining) { |
8f4c1f9b | 582 | switch (nla_type(attr)) { |
4e902c57 | 583 | case RTA_DST: |
17fb2c64 | 584 | cfg->fc_dst = nla_get_be32(attr); |
4e902c57 | 585 | break; |
4e902c57 TG |
586 | case RTA_OIF: |
587 | cfg->fc_oif = nla_get_u32(attr); | |
588 | break; | |
589 | case RTA_GATEWAY: | |
17fb2c64 | 590 | cfg->fc_gw = nla_get_be32(attr); |
4e902c57 TG |
591 | break; |
592 | case RTA_PRIORITY: | |
593 | cfg->fc_priority = nla_get_u32(attr); | |
594 | break; | |
595 | case RTA_PREFSRC: | |
17fb2c64 | 596 | cfg->fc_prefsrc = nla_get_be32(attr); |
4e902c57 TG |
597 | break; |
598 | case RTA_METRICS: | |
599 | cfg->fc_mx = nla_data(attr); | |
600 | cfg->fc_mx_len = nla_len(attr); | |
601 | break; | |
602 | case RTA_MULTIPATH: | |
603 | cfg->fc_mp = nla_data(attr); | |
604 | cfg->fc_mp_len = nla_len(attr); | |
605 | break; | |
606 | case RTA_FLOW: | |
607 | cfg->fc_flow = nla_get_u32(attr); | |
608 | break; | |
4e902c57 TG |
609 | case RTA_TABLE: |
610 | cfg->fc_table = nla_get_u32(attr); | |
611 | break; | |
1da177e4 LT |
612 | } |
613 | } | |
4e902c57 | 614 | |
1da177e4 | 615 | return 0; |
4e902c57 TG |
616 | errout: |
617 | return err; | |
1da177e4 LT |
618 | } |
619 | ||
661d2967 | 620 | static int inet_rtm_delroute(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 621 | { |
3b1e0a65 | 622 | struct net *net = sock_net(skb->sk); |
4e902c57 TG |
623 | struct fib_config cfg; |
624 | struct fib_table *tb; | |
625 | int err; | |
6fa3eb70 S |
626 | #ifdef CONFIG_MTK_NET_LOGGING |
627 | printk(KERN_INFO "[mtk_net][RTlog delete] inet_rtm_delroute !\n"); | |
628 | #endif | |
4b5d47d4 | 629 | err = rtm_to_fib_config(net, skb, nlh, &cfg); |
4e902c57 TG |
630 | if (err < 0) |
631 | goto errout; | |
6fa3eb70 S |
632 | #ifdef CONFIG_MTK_NET_LOGGING |
633 | printk(KERN_INFO "[mtk_net][RTlog info] inet_rtm_delroute cfg.fc_dst =%08x, cfg.fc_gw =%08x\n",cfg.fc_dst,cfg.fc_gw); | |
634 | #endif | |
8ad4942c | 635 | tb = fib_get_table(net, cfg.fc_table); |
4e902c57 TG |
636 | if (tb == NULL) { |
637 | err = -ESRCH; | |
638 | goto errout; | |
639 | } | |
640 | ||
16c6cf8b | 641 | err = fib_table_delete(tb, &cfg); |
4e902c57 TG |
642 | errout: |
643 | return err; | |
1da177e4 LT |
644 | } |
645 | ||
661d2967 | 646 | static int inet_rtm_newroute(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 647 | { |
3b1e0a65 | 648 | struct net *net = sock_net(skb->sk); |
4e902c57 TG |
649 | struct fib_config cfg; |
650 | struct fib_table *tb; | |
651 | int err; | |
6fa3eb70 S |
652 | #ifdef CONFIG_MTK_NET_LOGGING |
653 | printk(KERN_INFO "[mtk_net][RTlog insert] inet_rtm_newroute !\n"); | |
654 | #endif | |
1da177e4 | 655 | |
4b5d47d4 | 656 | err = rtm_to_fib_config(net, skb, nlh, &cfg); |
4e902c57 TG |
657 | if (err < 0) |
658 | goto errout; | |
6fa3eb70 S |
659 | #ifdef CONFIG_MTK_NET_LOGGING |
660 | printk(KERN_INFO "[mtk_net][RTlog info] inet_rtm_newroute cfg.fc_dst =%08x,cfg.fc_gw =%08x \n",cfg.fc_dst,cfg.fc_gw); | |
661 | #endif | |
1da177e4 | 662 | |
226b0b4a | 663 | tb = fib_new_table(net, cfg.fc_table); |
4e902c57 TG |
664 | if (tb == NULL) { |
665 | err = -ENOBUFS; | |
666 | goto errout; | |
667 | } | |
668 | ||
16c6cf8b | 669 | err = fib_table_insert(tb, &cfg); |
4e902c57 TG |
670 | errout: |
671 | return err; | |
1da177e4 LT |
672 | } |
673 | ||
63f3444f | 674 | static int inet_dump_fib(struct sk_buff *skb, struct netlink_callback *cb) |
1da177e4 | 675 | { |
3b1e0a65 | 676 | struct net *net = sock_net(skb->sk); |
1af5a8c4 PM |
677 | unsigned int h, s_h; |
678 | unsigned int e = 0, s_e; | |
1da177e4 | 679 | struct fib_table *tb; |
e4aef8ae | 680 | struct hlist_head *head; |
1af5a8c4 | 681 | int dumped = 0; |
1da177e4 | 682 | |
be403ea1 TG |
683 | if (nlmsg_len(cb->nlh) >= sizeof(struct rtmsg) && |
684 | ((struct rtmsg *) nlmsg_data(cb->nlh))->rtm_flags & RTM_F_CLONED) | |
1da177e4 LT |
685 | return ip_rt_dump(skb, cb); |
686 | ||
1af5a8c4 PM |
687 | s_h = cb->args[0]; |
688 | s_e = cb->args[1]; | |
689 | ||
690 | for (h = s_h; h < FIB_TABLE_HASHSZ; h++, s_e = 0) { | |
691 | e = 0; | |
e4aef8ae | 692 | head = &net->ipv4.fib_table_hash[h]; |
b67bfe0d | 693 | hlist_for_each_entry(tb, head, tb_hlist) { |
1af5a8c4 PM |
694 | if (e < s_e) |
695 | goto next; | |
696 | if (dumped) | |
697 | memset(&cb->args[2], 0, sizeof(cb->args) - | |
e905a9ed | 698 | 2 * sizeof(cb->args[0])); |
16c6cf8b | 699 | if (fib_table_dump(tb, skb, cb) < 0) |
1af5a8c4 PM |
700 | goto out; |
701 | dumped = 1; | |
702 | next: | |
703 | e++; | |
704 | } | |
1da177e4 | 705 | } |
1af5a8c4 PM |
706 | out: |
707 | cb->args[1] = e; | |
708 | cb->args[0] = h; | |
1da177e4 LT |
709 | |
710 | return skb->len; | |
711 | } | |
712 | ||
713 | /* Prepare and feed intra-kernel routing request. | |
6a31d2a9 ED |
714 | * Really, it should be netlink message, but :-( netlink |
715 | * can be not configured, so that we feed it directly | |
716 | * to fib engine. It is legal, because all events occur | |
717 | * only when netlink is already locked. | |
1da177e4 | 718 | */ |
81f7bf6c | 719 | static void fib_magic(int cmd, int type, __be32 dst, int dst_len, struct in_ifaddr *ifa) |
1da177e4 | 720 | { |
c346dca1 | 721 | struct net *net = dev_net(ifa->ifa_dev->dev); |
4e902c57 TG |
722 | struct fib_table *tb; |
723 | struct fib_config cfg = { | |
724 | .fc_protocol = RTPROT_KERNEL, | |
725 | .fc_type = type, | |
726 | .fc_dst = dst, | |
727 | .fc_dst_len = dst_len, | |
728 | .fc_prefsrc = ifa->ifa_local, | |
729 | .fc_oif = ifa->ifa_dev->dev->ifindex, | |
730 | .fc_nlflags = NLM_F_CREATE | NLM_F_APPEND, | |
4d1169c1 | 731 | .fc_nlinfo = { |
4b5d47d4 | 732 | .nl_net = net, |
4d1169c1 | 733 | }, |
4e902c57 | 734 | }; |
1da177e4 LT |
735 | |
736 | if (type == RTN_UNICAST) | |
4b5d47d4 | 737 | tb = fib_new_table(net, RT_TABLE_MAIN); |
1da177e4 | 738 | else |
4b5d47d4 | 739 | tb = fib_new_table(net, RT_TABLE_LOCAL); |
1da177e4 LT |
740 | |
741 | if (tb == NULL) | |
742 | return; | |
743 | ||
4e902c57 | 744 | cfg.fc_table = tb->tb_id; |
1da177e4 | 745 | |
4e902c57 TG |
746 | if (type != RTN_LOCAL) |
747 | cfg.fc_scope = RT_SCOPE_LINK; | |
748 | else | |
749 | cfg.fc_scope = RT_SCOPE_HOST; | |
1da177e4 LT |
750 | |
751 | if (cmd == RTM_NEWROUTE) | |
16c6cf8b | 752 | fib_table_insert(tb, &cfg); |
1da177e4 | 753 | else |
16c6cf8b | 754 | fib_table_delete(tb, &cfg); |
1da177e4 LT |
755 | } |
756 | ||
0ff60a45 | 757 | void fib_add_ifaddr(struct in_ifaddr *ifa) |
1da177e4 LT |
758 | { |
759 | struct in_device *in_dev = ifa->ifa_dev; | |
760 | struct net_device *dev = in_dev->dev; | |
761 | struct in_ifaddr *prim = ifa; | |
a144ea4b AV |
762 | __be32 mask = ifa->ifa_mask; |
763 | __be32 addr = ifa->ifa_local; | |
6a31d2a9 | 764 | __be32 prefix = ifa->ifa_address & mask; |
1da177e4 | 765 | |
6a31d2a9 | 766 | if (ifa->ifa_flags & IFA_F_SECONDARY) { |
1da177e4 LT |
767 | prim = inet_ifa_byprefix(in_dev, prefix, mask); |
768 | if (prim == NULL) { | |
058bd4d2 | 769 | pr_warn("%s: bug: prim == NULL\n", __func__); |
1da177e4 LT |
770 | return; |
771 | } | |
772 | } | |
773 | ||
774 | fib_magic(RTM_NEWROUTE, RTN_LOCAL, addr, 32, prim); | |
775 | ||
6a31d2a9 | 776 | if (!(dev->flags & IFF_UP)) |
1da177e4 LT |
777 | return; |
778 | ||
779 | /* Add broadcast address, if it is explicitly assigned. */ | |
a144ea4b | 780 | if (ifa->ifa_broadcast && ifa->ifa_broadcast != htonl(0xFFFFFFFF)) |
1da177e4 LT |
781 | fib_magic(RTM_NEWROUTE, RTN_BROADCAST, ifa->ifa_broadcast, 32, prim); |
782 | ||
6a31d2a9 | 783 | if (!ipv4_is_zeronet(prefix) && !(ifa->ifa_flags & IFA_F_SECONDARY) && |
1da177e4 | 784 | (prefix != addr || ifa->ifa_prefixlen < 32)) { |
6fa3eb70 S |
785 | /* MTK_NET_CHANGES */ |
786 | if(0 == strncmp(dev->name, "ccmni", 2)){ | |
787 | #ifdef CONFIG_MTK_NET_LOGGING | |
788 | printk(KERN_INFO "[mtk_net][RTlog] ignore ccmni subnet route\n"); | |
789 | #endif | |
790 | } else { | |
6a31d2a9 ED |
791 | fib_magic(RTM_NEWROUTE, |
792 | dev->flags & IFF_LOOPBACK ? RTN_LOCAL : RTN_UNICAST, | |
793 | prefix, ifa->ifa_prefixlen, prim); | |
6fa3eb70 | 794 | } |
1da177e4 LT |
795 | /* Add network specific broadcasts, when it takes a sense */ |
796 | if (ifa->ifa_prefixlen < 31) { | |
797 | fib_magic(RTM_NEWROUTE, RTN_BROADCAST, prefix, 32, prim); | |
6a31d2a9 ED |
798 | fib_magic(RTM_NEWROUTE, RTN_BROADCAST, prefix | ~mask, |
799 | 32, prim); | |
1da177e4 LT |
800 | } |
801 | } | |
802 | } | |
803 | ||
e6abbaa2 JA |
804 | /* Delete primary or secondary address. |
805 | * Optionally, on secondary address promotion consider the addresses | |
806 | * from subnet iprim as deleted, even if they are in device list. | |
807 | * In this case the secondary ifa can be in device list. | |
808 | */ | |
809 | void fib_del_ifaddr(struct in_ifaddr *ifa, struct in_ifaddr *iprim) | |
1da177e4 LT |
810 | { |
811 | struct in_device *in_dev = ifa->ifa_dev; | |
812 | struct net_device *dev = in_dev->dev; | |
813 | struct in_ifaddr *ifa1; | |
e6abbaa2 | 814 | struct in_ifaddr *prim = ifa, *prim1 = NULL; |
6a31d2a9 ED |
815 | __be32 brd = ifa->ifa_address | ~ifa->ifa_mask; |
816 | __be32 any = ifa->ifa_address & ifa->ifa_mask; | |
1da177e4 LT |
817 | #define LOCAL_OK 1 |
818 | #define BRD_OK 2 | |
819 | #define BRD0_OK 4 | |
820 | #define BRD1_OK 8 | |
95c96174 | 821 | unsigned int ok = 0; |
e6abbaa2 JA |
822 | int subnet = 0; /* Primary network */ |
823 | int gone = 1; /* Address is missing */ | |
824 | int same_prefsrc = 0; /* Another primary with same IP */ | |
1da177e4 | 825 | |
e6abbaa2 | 826 | if (ifa->ifa_flags & IFA_F_SECONDARY) { |
1da177e4 LT |
827 | prim = inet_ifa_byprefix(in_dev, any, ifa->ifa_mask); |
828 | if (prim == NULL) { | |
058bd4d2 | 829 | pr_warn("%s: bug: prim == NULL\n", __func__); |
1da177e4 LT |
830 | return; |
831 | } | |
e6abbaa2 | 832 | if (iprim && iprim != prim) { |
058bd4d2 | 833 | pr_warn("%s: bug: iprim != prim\n", __func__); |
e6abbaa2 JA |
834 | return; |
835 | } | |
836 | } else if (!ipv4_is_zeronet(any) && | |
837 | (any != ifa->ifa_local || ifa->ifa_prefixlen < 32)) { | |
838 | fib_magic(RTM_DELROUTE, | |
839 | dev->flags & IFF_LOOPBACK ? RTN_LOCAL : RTN_UNICAST, | |
840 | any, ifa->ifa_prefixlen, prim); | |
841 | subnet = 1; | |
1da177e4 LT |
842 | } |
843 | ||
844 | /* Deletion is more complicated than add. | |
6a31d2a9 ED |
845 | * We should take care of not to delete too much :-) |
846 | * | |
847 | * Scan address list to be sure that addresses are really gone. | |
1da177e4 LT |
848 | */ |
849 | ||
850 | for (ifa1 = in_dev->ifa_list; ifa1; ifa1 = ifa1->ifa_next) { | |
e6abbaa2 JA |
851 | if (ifa1 == ifa) { |
852 | /* promotion, keep the IP */ | |
853 | gone = 0; | |
854 | continue; | |
855 | } | |
856 | /* Ignore IFAs from our subnet */ | |
857 | if (iprim && ifa1->ifa_mask == iprim->ifa_mask && | |
858 | inet_ifa_match(ifa1->ifa_address, iprim)) | |
859 | continue; | |
860 | ||
861 | /* Ignore ifa1 if it uses different primary IP (prefsrc) */ | |
862 | if (ifa1->ifa_flags & IFA_F_SECONDARY) { | |
863 | /* Another address from our subnet? */ | |
864 | if (ifa1->ifa_mask == prim->ifa_mask && | |
865 | inet_ifa_match(ifa1->ifa_address, prim)) | |
866 | prim1 = prim; | |
867 | else { | |
868 | /* We reached the secondaries, so | |
869 | * same_prefsrc should be determined. | |
870 | */ | |
871 | if (!same_prefsrc) | |
872 | continue; | |
873 | /* Search new prim1 if ifa1 is not | |
874 | * using the current prim1 | |
875 | */ | |
876 | if (!prim1 || | |
877 | ifa1->ifa_mask != prim1->ifa_mask || | |
878 | !inet_ifa_match(ifa1->ifa_address, prim1)) | |
879 | prim1 = inet_ifa_byprefix(in_dev, | |
880 | ifa1->ifa_address, | |
881 | ifa1->ifa_mask); | |
882 | if (!prim1) | |
883 | continue; | |
884 | if (prim1->ifa_local != prim->ifa_local) | |
885 | continue; | |
886 | } | |
887 | } else { | |
888 | if (prim->ifa_local != ifa1->ifa_local) | |
889 | continue; | |
890 | prim1 = ifa1; | |
891 | if (prim != prim1) | |
892 | same_prefsrc = 1; | |
893 | } | |
1da177e4 LT |
894 | if (ifa->ifa_local == ifa1->ifa_local) |
895 | ok |= LOCAL_OK; | |
896 | if (ifa->ifa_broadcast == ifa1->ifa_broadcast) | |
897 | ok |= BRD_OK; | |
898 | if (brd == ifa1->ifa_broadcast) | |
899 | ok |= BRD1_OK; | |
900 | if (any == ifa1->ifa_broadcast) | |
901 | ok |= BRD0_OK; | |
e6abbaa2 JA |
902 | /* primary has network specific broadcasts */ |
903 | if (prim1 == ifa1 && ifa1->ifa_prefixlen < 31) { | |
904 | __be32 brd1 = ifa1->ifa_address | ~ifa1->ifa_mask; | |
905 | __be32 any1 = ifa1->ifa_address & ifa1->ifa_mask; | |
906 | ||
907 | if (!ipv4_is_zeronet(any1)) { | |
908 | if (ifa->ifa_broadcast == brd1 || | |
909 | ifa->ifa_broadcast == any1) | |
910 | ok |= BRD_OK; | |
911 | if (brd == brd1 || brd == any1) | |
912 | ok |= BRD1_OK; | |
913 | if (any == brd1 || any == any1) | |
914 | ok |= BRD0_OK; | |
915 | } | |
916 | } | |
1da177e4 LT |
917 | } |
918 | ||
6a31d2a9 | 919 | if (!(ok & BRD_OK)) |
1da177e4 | 920 | fib_magic(RTM_DELROUTE, RTN_BROADCAST, ifa->ifa_broadcast, 32, prim); |
e6abbaa2 JA |
921 | if (subnet && ifa->ifa_prefixlen < 31) { |
922 | if (!(ok & BRD1_OK)) | |
923 | fib_magic(RTM_DELROUTE, RTN_BROADCAST, brd, 32, prim); | |
924 | if (!(ok & BRD0_OK)) | |
925 | fib_magic(RTM_DELROUTE, RTN_BROADCAST, any, 32, prim); | |
926 | } | |
6a31d2a9 | 927 | if (!(ok & LOCAL_OK)) { |
1da177e4 LT |
928 | fib_magic(RTM_DELROUTE, RTN_LOCAL, ifa->ifa_local, 32, prim); |
929 | ||
930 | /* Check, that this local address finally disappeared. */ | |
e6abbaa2 JA |
931 | if (gone && |
932 | inet_addr_type(dev_net(dev), ifa->ifa_local) != RTN_LOCAL) { | |
1da177e4 | 933 | /* And the last, but not the least thing. |
6a31d2a9 ED |
934 | * We must flush stray FIB entries. |
935 | * | |
936 | * First of all, we scan fib_info list searching | |
937 | * for stray nexthop entries, then ignite fib_flush. | |
938 | */ | |
c346dca1 YH |
939 | if (fib_sync_down_addr(dev_net(dev), ifa->ifa_local)) |
940 | fib_flush(dev_net(dev)); | |
1da177e4 LT |
941 | } |
942 | } | |
943 | #undef LOCAL_OK | |
944 | #undef BRD_OK | |
945 | #undef BRD0_OK | |
946 | #undef BRD1_OK | |
947 | } | |
948 | ||
6a31d2a9 | 949 | static void nl_fib_lookup(struct fib_result_nl *frn, struct fib_table *tb) |
246955fe | 950 | { |
e905a9ed | 951 | |
246955fe | 952 | struct fib_result res; |
9ade2286 DM |
953 | struct flowi4 fl4 = { |
954 | .flowi4_mark = frn->fl_mark, | |
955 | .daddr = frn->fl_addr, | |
956 | .flowi4_tos = frn->fl_tos, | |
957 | .flowi4_scope = frn->fl_scope, | |
6a31d2a9 | 958 | }; |
1194ed0a AK |
959 | |
960 | frn->err = -ENOENT; | |
246955fe RO |
961 | if (tb) { |
962 | local_bh_disable(); | |
963 | ||
964 | frn->tb_id = tb->tb_id; | |
ebc0ffae | 965 | rcu_read_lock(); |
9ade2286 | 966 | frn->err = fib_table_lookup(tb, &fl4, &res, FIB_LOOKUP_NOREF); |
246955fe RO |
967 | |
968 | if (!frn->err) { | |
969 | frn->prefixlen = res.prefixlen; | |
970 | frn->nh_sel = res.nh_sel; | |
971 | frn->type = res.type; | |
972 | frn->scope = res.scope; | |
973 | } | |
ebc0ffae | 974 | rcu_read_unlock(); |
246955fe RO |
975 | local_bh_enable(); |
976 | } | |
977 | } | |
978 | ||
28f7b036 | 979 | static void nl_fib_input(struct sk_buff *skb) |
246955fe | 980 | { |
6bd48fcf | 981 | struct net *net; |
246955fe | 982 | struct fib_result_nl *frn; |
28f7b036 | 983 | struct nlmsghdr *nlh; |
246955fe | 984 | struct fib_table *tb; |
15e47304 | 985 | u32 portid; |
1194ed0a | 986 | |
3b1e0a65 | 987 | net = sock_net(skb->sk); |
b529ccf2 | 988 | nlh = nlmsg_hdr(skb); |
7dbfa253 ED |
989 | if (skb->len < nlmsg_total_size(sizeof(*frn)) || |
990 | skb->len < nlh->nlmsg_len || | |
573ce260 | 991 | nlmsg_len(nlh) < sizeof(*frn)) |
ea86575e | 992 | return; |
d883a036 DL |
993 | |
994 | skb = skb_clone(skb, GFP_KERNEL); | |
995 | if (skb == NULL) | |
996 | return; | |
997 | nlh = nlmsg_hdr(skb); | |
e905a9ed | 998 | |
573ce260 | 999 | frn = (struct fib_result_nl *) nlmsg_data(nlh); |
6bd48fcf | 1000 | tb = fib_get_table(net, frn->tb_id_in); |
246955fe RO |
1001 | |
1002 | nl_fib_lookup(frn, tb); | |
e905a9ed | 1003 | |
28a28283 | 1004 | portid = NETLINK_CB(skb).portid; /* netlink portid */ |
15e47304 | 1005 | NETLINK_CB(skb).portid = 0; /* from kernel */ |
ac6d439d | 1006 | NETLINK_CB(skb).dst_group = 0; /* unicast */ |
15e47304 | 1007 | netlink_unicast(net->ipv4.fibnl, skb, portid, MSG_DONTWAIT); |
e905a9ed | 1008 | } |
246955fe | 1009 | |
2c8c1e72 | 1010 | static int __net_init nl_fib_lookup_init(struct net *net) |
246955fe | 1011 | { |
6bd48fcf | 1012 | struct sock *sk; |
a31f2d17 PNA |
1013 | struct netlink_kernel_cfg cfg = { |
1014 | .input = nl_fib_input, | |
1015 | }; | |
1016 | ||
9f00d977 | 1017 | sk = netlink_kernel_create(net, NETLINK_FIB_LOOKUP, &cfg); |
6bd48fcf | 1018 | if (sk == NULL) |
7b1a74fd | 1019 | return -EAFNOSUPPORT; |
6bd48fcf | 1020 | net->ipv4.fibnl = sk; |
7b1a74fd DL |
1021 | return 0; |
1022 | } | |
1023 | ||
1024 | static void nl_fib_lookup_exit(struct net *net) | |
1025 | { | |
b7c6ba6e | 1026 | netlink_kernel_release(net->ipv4.fibnl); |
775516bf | 1027 | net->ipv4.fibnl = NULL; |
246955fe RO |
1028 | } |
1029 | ||
4ccfe6d4 | 1030 | static void fib_disable_ip(struct net_device *dev, int force) |
1da177e4 | 1031 | { |
85326fa5 | 1032 | if (fib_sync_down_dev(dev, force)) |
c346dca1 | 1033 | fib_flush(dev_net(dev)); |
4ccfe6d4 | 1034 | rt_cache_flush(dev_net(dev)); |
1da177e4 LT |
1035 | arp_ifdown(dev); |
1036 | } | |
1037 | ||
1038 | static int fib_inetaddr_event(struct notifier_block *this, unsigned long event, void *ptr) | |
1039 | { | |
6ed2533e | 1040 | struct in_ifaddr *ifa = (struct in_ifaddr *)ptr; |
76e6ebfb | 1041 | struct net_device *dev = ifa->ifa_dev->dev; |
436c3b66 | 1042 | struct net *net = dev_net(dev); |
1da177e4 LT |
1043 | |
1044 | switch (event) { | |
1045 | case NETDEV_UP: | |
6fa3eb70 S |
1046 | #ifdef CONFIG_MTK_NET_LOGGING |
1047 | printk(KERN_INFO "[mtk_net][RTlog insert] fib_inetaddr_event() %s NETDEV_UP!\n", ifa->ifa_dev->dev->name); | |
1048 | #endif | |
1da177e4 LT |
1049 | fib_add_ifaddr(ifa); |
1050 | #ifdef CONFIG_IP_ROUTE_MULTIPATH | |
76e6ebfb | 1051 | fib_sync_up(dev); |
1da177e4 | 1052 | #endif |
436c3b66 | 1053 | atomic_inc(&net->ipv4.dev_addr_genid); |
4ccfe6d4 | 1054 | rt_cache_flush(dev_net(dev)); |
1da177e4 LT |
1055 | break; |
1056 | case NETDEV_DOWN: | |
6fa3eb70 S |
1057 | #ifdef CONFIG_MTK_NET_LOGGING |
1058 | printk(KERN_INFO "[mtk_net][RTlog delete] fib_inetaddr_event() %s NETDEV_DOWN!\n", ifa->ifa_dev->dev->name); | |
1059 | #endif | |
e6abbaa2 | 1060 | fib_del_ifaddr(ifa, NULL); |
436c3b66 | 1061 | atomic_inc(&net->ipv4.dev_addr_genid); |
9fcc2e8a | 1062 | if (ifa->ifa_dev->ifa_list == NULL) { |
1da177e4 | 1063 | /* Last address was deleted from this interface. |
6a31d2a9 | 1064 | * Disable IP. |
1da177e4 | 1065 | */ |
4ccfe6d4 | 1066 | fib_disable_ip(dev, 1); |
1da177e4 | 1067 | } else { |
4ccfe6d4 | 1068 | rt_cache_flush(dev_net(dev)); |
1da177e4 LT |
1069 | } |
1070 | break; | |
1071 | } | |
1072 | return NOTIFY_DONE; | |
1073 | } | |
1074 | ||
1075 | static int fib_netdev_event(struct notifier_block *this, unsigned long event, void *ptr) | |
1076 | { | |
1077 | struct net_device *dev = ptr; | |
0115e8e3 | 1078 | struct in_device *in_dev; |
436c3b66 | 1079 | struct net *net = dev_net(dev); |
1da177e4 LT |
1080 | |
1081 | if (event == NETDEV_UNREGISTER) { | |
4ccfe6d4 | 1082 | fib_disable_ip(dev, 2); |
caacf05e | 1083 | rt_flush_dev(dev); |
1da177e4 LT |
1084 | return NOTIFY_DONE; |
1085 | } | |
1086 | ||
0115e8e3 | 1087 | in_dev = __in_dev_get_rtnl(dev); |
7dd52e5d OH |
1088 | if (!in_dev) |
1089 | return NOTIFY_DONE; | |
0115e8e3 | 1090 | |
1da177e4 LT |
1091 | switch (event) { |
1092 | case NETDEV_UP: | |
6fa3eb70 S |
1093 | #ifdef CONFIG_MTK_NET_LOGGING |
1094 | printk(KERN_INFO "[mtk_net][RTlog insert] fib_netdev_event() %s NETDEV_UP!\n", dev->name); | |
1095 | #endif | |
1da177e4 LT |
1096 | for_ifa(in_dev) { |
1097 | fib_add_ifaddr(ifa); | |
1098 | } endfor_ifa(in_dev); | |
1099 | #ifdef CONFIG_IP_ROUTE_MULTIPATH | |
1100 | fib_sync_up(dev); | |
1101 | #endif | |
436c3b66 | 1102 | atomic_inc(&net->ipv4.dev_addr_genid); |
4ccfe6d4 | 1103 | rt_cache_flush(net); |
1da177e4 LT |
1104 | break; |
1105 | case NETDEV_DOWN: | |
6fa3eb70 S |
1106 | #ifdef CONFIG_MTK_NET_LOGGING |
1107 | printk(KERN_INFO "[mtk_net][RTlog delete] fib_netdev_event() %s NETDEV_DOWN!\n", dev->name); | |
1108 | #endif | |
4ccfe6d4 | 1109 | fib_disable_ip(dev, 0); |
1da177e4 LT |
1110 | break; |
1111 | case NETDEV_CHANGEMTU: | |
1112 | case NETDEV_CHANGE: | |
4ccfe6d4 | 1113 | rt_cache_flush(net); |
1da177e4 LT |
1114 | break; |
1115 | } | |
1116 | return NOTIFY_DONE; | |
1117 | } | |
1118 | ||
1119 | static struct notifier_block fib_inetaddr_notifier = { | |
6ed2533e | 1120 | .notifier_call = fib_inetaddr_event, |
1da177e4 LT |
1121 | }; |
1122 | ||
1123 | static struct notifier_block fib_netdev_notifier = { | |
6ed2533e | 1124 | .notifier_call = fib_netdev_event, |
1da177e4 LT |
1125 | }; |
1126 | ||
7b1a74fd | 1127 | static int __net_init ip_fib_net_init(struct net *net) |
1da177e4 | 1128 | { |
dce5cbee | 1129 | int err; |
10da66f7 ED |
1130 | size_t size = sizeof(struct hlist_head) * FIB_TABLE_HASHSZ; |
1131 | ||
1132 | /* Avoid false sharing : Use at least a full cache line */ | |
1133 | size = max_t(size_t, size, L1_CACHE_BYTES); | |
1af5a8c4 | 1134 | |
10da66f7 | 1135 | net->ipv4.fib_table_hash = kzalloc(size, GFP_KERNEL); |
e4aef8ae DL |
1136 | if (net->ipv4.fib_table_hash == NULL) |
1137 | return -ENOMEM; | |
1138 | ||
dce5cbee DL |
1139 | err = fib4_rules_init(net); |
1140 | if (err < 0) | |
1141 | goto fail; | |
1142 | return 0; | |
1143 | ||
1144 | fail: | |
1145 | kfree(net->ipv4.fib_table_hash); | |
1146 | return err; | |
7b1a74fd | 1147 | } |
1da177e4 | 1148 | |
2c8c1e72 | 1149 | static void ip_fib_net_exit(struct net *net) |
7b1a74fd DL |
1150 | { |
1151 | unsigned int i; | |
1152 | ||
1153 | #ifdef CONFIG_IP_MULTIPLE_TABLES | |
1154 | fib4_rules_exit(net); | |
1155 | #endif | |
1156 | ||
e2666f84 | 1157 | rtnl_lock(); |
7b1a74fd DL |
1158 | for (i = 0; i < FIB_TABLE_HASHSZ; i++) { |
1159 | struct fib_table *tb; | |
1160 | struct hlist_head *head; | |
b67bfe0d | 1161 | struct hlist_node *tmp; |
63f3444f | 1162 | |
e4aef8ae | 1163 | head = &net->ipv4.fib_table_hash[i]; |
b67bfe0d SL |
1164 | hlist_for_each_entry_safe(tb, tmp, head, tb_hlist) { |
1165 | hlist_del(&tb->tb_hlist); | |
16c6cf8b | 1166 | fib_table_flush(tb); |
4aa2c466 | 1167 | fib_free_table(tb); |
7b1a74fd DL |
1168 | } |
1169 | } | |
e2666f84 | 1170 | rtnl_unlock(); |
e4aef8ae | 1171 | kfree(net->ipv4.fib_table_hash); |
7b1a74fd DL |
1172 | } |
1173 | ||
1174 | static int __net_init fib_net_init(struct net *net) | |
1175 | { | |
1176 | int error; | |
1177 | ||
f4530fa5 DM |
1178 | #ifdef CONFIG_IP_ROUTE_CLASSID |
1179 | net->ipv4.fib_num_tclassid_users = 0; | |
1180 | #endif | |
7b1a74fd DL |
1181 | error = ip_fib_net_init(net); |
1182 | if (error < 0) | |
1183 | goto out; | |
1184 | error = nl_fib_lookup_init(net); | |
1185 | if (error < 0) | |
1186 | goto out_nlfl; | |
1187 | error = fib_proc_init(net); | |
1188 | if (error < 0) | |
1189 | goto out_proc; | |
1190 | out: | |
1191 | return error; | |
1192 | ||
1193 | out_proc: | |
1194 | nl_fib_lookup_exit(net); | |
1195 | out_nlfl: | |
1196 | ip_fib_net_exit(net); | |
1197 | goto out; | |
1198 | } | |
1199 | ||
1200 | static void __net_exit fib_net_exit(struct net *net) | |
1201 | { | |
1202 | fib_proc_exit(net); | |
1203 | nl_fib_lookup_exit(net); | |
1204 | ip_fib_net_exit(net); | |
1205 | } | |
1206 | ||
1207 | static struct pernet_operations fib_net_ops = { | |
1208 | .init = fib_net_init, | |
1209 | .exit = fib_net_exit, | |
1210 | }; | |
1211 | ||
1212 | void __init ip_fib_init(void) | |
1213 | { | |
c7ac8679 GR |
1214 | rtnl_register(PF_INET, RTM_NEWROUTE, inet_rtm_newroute, NULL, NULL); |
1215 | rtnl_register(PF_INET, RTM_DELROUTE, inet_rtm_delroute, NULL, NULL); | |
1216 | rtnl_register(PF_INET, RTM_GETROUTE, NULL, inet_dump_fib, NULL); | |
7b1a74fd DL |
1217 | |
1218 | register_pernet_subsys(&fib_net_ops); | |
1219 | register_netdevice_notifier(&fib_netdev_notifier); | |
1220 | register_inetaddr_notifier(&fib_inetaddr_notifier); | |
7f9b8052 | 1221 | |
5348ba85 | 1222 | fib_trie_init(); |
1da177e4 | 1223 | } |