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 | * Routing netlink socket interface: protocol independent part. | |
7 | * | |
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 | * Fixes: | |
16 | * Vitaly E. Lavrov RTA_OK arithmetics was wrong. | |
17 | */ | |
18 | ||
1da177e4 LT |
19 | #include <linux/errno.h> |
20 | #include <linux/module.h> | |
21 | #include <linux/types.h> | |
22 | #include <linux/socket.h> | |
23 | #include <linux/kernel.h> | |
1da177e4 LT |
24 | #include <linux/sched.h> |
25 | #include <linux/timer.h> | |
26 | #include <linux/string.h> | |
27 | #include <linux/sockios.h> | |
28 | #include <linux/net.h> | |
29 | #include <linux/fcntl.h> | |
30 | #include <linux/mm.h> | |
31 | #include <linux/slab.h> | |
32 | #include <linux/interrupt.h> | |
33 | #include <linux/capability.h> | |
34 | #include <linux/skbuff.h> | |
35 | #include <linux/init.h> | |
36 | #include <linux/security.h> | |
6756ae4b | 37 | #include <linux/mutex.h> |
1823730f | 38 | #include <linux/if_addr.h> |
1da177e4 LT |
39 | |
40 | #include <asm/uaccess.h> | |
41 | #include <asm/system.h> | |
42 | #include <asm/string.h> | |
43 | ||
44 | #include <linux/inet.h> | |
45 | #include <linux/netdevice.h> | |
46 | #include <net/ip.h> | |
47 | #include <net/protocol.h> | |
48 | #include <net/arp.h> | |
49 | #include <net/route.h> | |
50 | #include <net/udp.h> | |
51 | #include <net/sock.h> | |
52 | #include <net/pkt_sched.h> | |
14c0b97d | 53 | #include <net/fib_rules.h> |
9ac4a169 | 54 | #include <net/netlink.h> |
711e2c33 JT |
55 | #ifdef CONFIG_NET_WIRELESS_RTNETLINK |
56 | #include <linux/wireless.h> | |
57 | #include <net/iw_handler.h> | |
58 | #endif /* CONFIG_NET_WIRELESS_RTNETLINK */ | |
1da177e4 | 59 | |
6756ae4b | 60 | static DEFINE_MUTEX(rtnl_mutex); |
1da177e4 LT |
61 | |
62 | void rtnl_lock(void) | |
63 | { | |
6756ae4b | 64 | mutex_lock(&rtnl_mutex); |
1da177e4 LT |
65 | } |
66 | ||
6756ae4b | 67 | void __rtnl_unlock(void) |
1da177e4 | 68 | { |
6756ae4b | 69 | mutex_unlock(&rtnl_mutex); |
1da177e4 | 70 | } |
6756ae4b | 71 | |
1da177e4 LT |
72 | void rtnl_unlock(void) |
73 | { | |
6756ae4b SH |
74 | mutex_unlock(&rtnl_mutex); |
75 | if (rtnl && rtnl->sk_receive_queue.qlen) | |
76 | rtnl->sk_data_ready(rtnl, 0); | |
1da177e4 LT |
77 | netdev_run_todo(); |
78 | } | |
79 | ||
6756ae4b SH |
80 | int rtnl_trylock(void) |
81 | { | |
82 | return mutex_trylock(&rtnl_mutex); | |
83 | } | |
84 | ||
1da177e4 LT |
85 | int rtattr_parse(struct rtattr *tb[], int maxattr, struct rtattr *rta, int len) |
86 | { | |
87 | memset(tb, 0, sizeof(struct rtattr*)*maxattr); | |
88 | ||
89 | while (RTA_OK(rta, len)) { | |
90 | unsigned flavor = rta->rta_type; | |
91 | if (flavor && flavor <= maxattr) | |
92 | tb[flavor-1] = rta; | |
93 | rta = RTA_NEXT(rta, len); | |
94 | } | |
95 | return 0; | |
96 | } | |
97 | ||
98 | struct sock *rtnl; | |
99 | ||
100 | struct rtnetlink_link * rtnetlink_links[NPROTO]; | |
101 | ||
db46edc6 | 102 | static const int rtm_min[RTM_NR_FAMILIES] = |
1da177e4 | 103 | { |
f90a0a74 TG |
104 | [RTM_FAM(RTM_NEWLINK)] = NLMSG_LENGTH(sizeof(struct ifinfomsg)), |
105 | [RTM_FAM(RTM_NEWADDR)] = NLMSG_LENGTH(sizeof(struct ifaddrmsg)), | |
106 | [RTM_FAM(RTM_NEWROUTE)] = NLMSG_LENGTH(sizeof(struct rtmsg)), | |
14c0b97d | 107 | [RTM_FAM(RTM_NEWRULE)] = NLMSG_LENGTH(sizeof(struct fib_rule_hdr)), |
f90a0a74 TG |
108 | [RTM_FAM(RTM_NEWQDISC)] = NLMSG_LENGTH(sizeof(struct tcmsg)), |
109 | [RTM_FAM(RTM_NEWTCLASS)] = NLMSG_LENGTH(sizeof(struct tcmsg)), | |
110 | [RTM_FAM(RTM_NEWTFILTER)] = NLMSG_LENGTH(sizeof(struct tcmsg)), | |
111 | [RTM_FAM(RTM_NEWACTION)] = NLMSG_LENGTH(sizeof(struct tcamsg)), | |
112 | [RTM_FAM(RTM_NEWPREFIX)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)), | |
113 | [RTM_FAM(RTM_GETMULTICAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)), | |
114 | [RTM_FAM(RTM_GETANYCAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)), | |
1da177e4 LT |
115 | }; |
116 | ||
db46edc6 | 117 | static const int rta_max[RTM_NR_FAMILIES] = |
1da177e4 | 118 | { |
f90a0a74 TG |
119 | [RTM_FAM(RTM_NEWLINK)] = IFLA_MAX, |
120 | [RTM_FAM(RTM_NEWADDR)] = IFA_MAX, | |
121 | [RTM_FAM(RTM_NEWROUTE)] = RTA_MAX, | |
14c0b97d | 122 | [RTM_FAM(RTM_NEWRULE)] = FRA_MAX, |
f90a0a74 TG |
123 | [RTM_FAM(RTM_NEWQDISC)] = TCA_MAX, |
124 | [RTM_FAM(RTM_NEWTCLASS)] = TCA_MAX, | |
125 | [RTM_FAM(RTM_NEWTFILTER)] = TCA_MAX, | |
126 | [RTM_FAM(RTM_NEWACTION)] = TCAA_MAX, | |
1da177e4 LT |
127 | }; |
128 | ||
129 | void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data) | |
130 | { | |
131 | struct rtattr *rta; | |
132 | int size = RTA_LENGTH(attrlen); | |
133 | ||
134 | rta = (struct rtattr*)skb_put(skb, RTA_ALIGN(size)); | |
135 | rta->rta_type = attrtype; | |
136 | rta->rta_len = size; | |
137 | memcpy(RTA_DATA(rta), data, attrlen); | |
b3563c4f | 138 | memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size); |
1da177e4 LT |
139 | } |
140 | ||
141 | size_t rtattr_strlcpy(char *dest, const struct rtattr *rta, size_t size) | |
142 | { | |
143 | size_t ret = RTA_PAYLOAD(rta); | |
144 | char *src = RTA_DATA(rta); | |
145 | ||
146 | if (ret > 0 && src[ret - 1] == '\0') | |
147 | ret--; | |
148 | if (size > 0) { | |
149 | size_t len = (ret >= size) ? size - 1 : ret; | |
150 | memset(dest, 0, size); | |
151 | memcpy(dest, src, len); | |
152 | } | |
153 | return ret; | |
154 | } | |
155 | ||
156 | int rtnetlink_send(struct sk_buff *skb, u32 pid, unsigned group, int echo) | |
157 | { | |
158 | int err = 0; | |
159 | ||
ac6d439d | 160 | NETLINK_CB(skb).dst_group = group; |
1da177e4 LT |
161 | if (echo) |
162 | atomic_inc(&skb->users); | |
163 | netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL); | |
164 | if (echo) | |
165 | err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT); | |
166 | return err; | |
167 | } | |
168 | ||
169 | int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics) | |
170 | { | |
171 | struct rtattr *mx = (struct rtattr*)skb->tail; | |
172 | int i; | |
173 | ||
174 | RTA_PUT(skb, RTA_METRICS, 0, NULL); | |
175 | for (i=0; i<RTAX_MAX; i++) { | |
176 | if (metrics[i]) | |
177 | RTA_PUT(skb, i+1, sizeof(u32), metrics+i); | |
178 | } | |
179 | mx->rta_len = skb->tail - (u8*)mx; | |
180 | if (mx->rta_len == RTA_LENGTH(0)) | |
181 | skb_trim(skb, (u8*)mx - skb->data); | |
182 | return 0; | |
183 | ||
184 | rtattr_failure: | |
185 | skb_trim(skb, (u8*)mx - skb->data); | |
186 | return -1; | |
187 | } | |
188 | ||
189 | ||
b00055aa SR |
190 | static void set_operstate(struct net_device *dev, unsigned char transition) |
191 | { | |
192 | unsigned char operstate = dev->operstate; | |
193 | ||
194 | switch(transition) { | |
195 | case IF_OPER_UP: | |
196 | if ((operstate == IF_OPER_DORMANT || | |
197 | operstate == IF_OPER_UNKNOWN) && | |
198 | !netif_dormant(dev)) | |
199 | operstate = IF_OPER_UP; | |
200 | break; | |
201 | ||
202 | case IF_OPER_DORMANT: | |
203 | if (operstate == IF_OPER_UP || | |
204 | operstate == IF_OPER_UNKNOWN) | |
205 | operstate = IF_OPER_DORMANT; | |
206 | break; | |
207 | }; | |
208 | ||
209 | if (dev->operstate != operstate) { | |
210 | write_lock_bh(&dev_base_lock); | |
211 | dev->operstate = operstate; | |
212 | write_unlock_bh(&dev_base_lock); | |
213 | netdev_state_change(dev); | |
214 | } | |
215 | } | |
216 | ||
b60c5115 TG |
217 | static void copy_rtnl_link_stats(struct rtnl_link_stats *a, |
218 | struct net_device_stats *b) | |
1da177e4 | 219 | { |
b60c5115 TG |
220 | a->rx_packets = b->rx_packets; |
221 | a->tx_packets = b->tx_packets; | |
222 | a->rx_bytes = b->rx_bytes; | |
223 | a->tx_bytes = b->tx_bytes; | |
224 | a->rx_errors = b->rx_errors; | |
225 | a->tx_errors = b->tx_errors; | |
226 | a->rx_dropped = b->rx_dropped; | |
227 | a->tx_dropped = b->tx_dropped; | |
228 | ||
229 | a->multicast = b->multicast; | |
230 | a->collisions = b->collisions; | |
231 | ||
232 | a->rx_length_errors = b->rx_length_errors; | |
233 | a->rx_over_errors = b->rx_over_errors; | |
234 | a->rx_crc_errors = b->rx_crc_errors; | |
235 | a->rx_frame_errors = b->rx_frame_errors; | |
236 | a->rx_fifo_errors = b->rx_fifo_errors; | |
237 | a->rx_missed_errors = b->rx_missed_errors; | |
238 | ||
239 | a->tx_aborted_errors = b->tx_aborted_errors; | |
240 | a->tx_carrier_errors = b->tx_carrier_errors; | |
241 | a->tx_fifo_errors = b->tx_fifo_errors; | |
242 | a->tx_heartbeat_errors = b->tx_heartbeat_errors; | |
243 | a->tx_window_errors = b->tx_window_errors; | |
244 | ||
245 | a->rx_compressed = b->rx_compressed; | |
246 | a->tx_compressed = b->tx_compressed; | |
247 | }; | |
1da177e4 | 248 | |
b60c5115 TG |
249 | static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev, |
250 | void *iwbuf, int iwbuflen, int type, u32 pid, | |
251 | u32 seq, u32 change, unsigned int flags) | |
252 | { | |
253 | struct ifinfomsg *ifm; | |
254 | struct nlmsghdr *nlh; | |
1da177e4 | 255 | |
b60c5115 TG |
256 | nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags); |
257 | if (nlh == NULL) | |
258 | return -ENOBUFS; | |
1da177e4 | 259 | |
b60c5115 TG |
260 | ifm = nlmsg_data(nlh); |
261 | ifm->ifi_family = AF_UNSPEC; | |
262 | ifm->__ifi_pad = 0; | |
263 | ifm->ifi_type = dev->type; | |
264 | ifm->ifi_index = dev->ifindex; | |
265 | ifm->ifi_flags = dev_get_flags(dev); | |
266 | ifm->ifi_change = change; | |
267 | ||
268 | NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name); | |
269 | NLA_PUT_U32(skb, IFLA_TXQLEN, dev->tx_queue_len); | |
270 | NLA_PUT_U32(skb, IFLA_WEIGHT, dev->weight); | |
271 | NLA_PUT_U8(skb, IFLA_OPERSTATE, | |
272 | netif_running(dev) ? dev->operstate : IF_OPER_DOWN); | |
273 | NLA_PUT_U8(skb, IFLA_LINKMODE, dev->link_mode); | |
274 | NLA_PUT_U32(skb, IFLA_MTU, dev->mtu); | |
275 | ||
276 | if (dev->ifindex != dev->iflink) | |
277 | NLA_PUT_U32(skb, IFLA_LINK, dev->iflink); | |
278 | ||
279 | if (dev->master) | |
280 | NLA_PUT_U32(skb, IFLA_MASTER, dev->master->ifindex); | |
1da177e4 | 281 | |
b60c5115 TG |
282 | if (dev->qdisc_sleeping) |
283 | NLA_PUT_STRING(skb, IFLA_QDISC, dev->qdisc_sleeping->ops->id); | |
b00055aa | 284 | |
1da177e4 LT |
285 | if (1) { |
286 | struct rtnl_link_ifmap map = { | |
287 | .mem_start = dev->mem_start, | |
288 | .mem_end = dev->mem_end, | |
289 | .base_addr = dev->base_addr, | |
290 | .irq = dev->irq, | |
291 | .dma = dev->dma, | |
292 | .port = dev->if_port, | |
293 | }; | |
b60c5115 | 294 | NLA_PUT(skb, IFLA_MAP, sizeof(map), &map); |
1da177e4 LT |
295 | } |
296 | ||
297 | if (dev->addr_len) { | |
b60c5115 TG |
298 | NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr); |
299 | NLA_PUT(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast); | |
1da177e4 LT |
300 | } |
301 | ||
302 | if (dev->get_stats) { | |
b60c5115 | 303 | struct net_device_stats *stats = dev->get_stats(dev); |
1da177e4 | 304 | if (stats) { |
b60c5115 TG |
305 | struct nlattr *attr; |
306 | ||
307 | attr = nla_reserve(skb, IFLA_STATS, | |
308 | sizeof(struct rtnl_link_stats)); | |
309 | if (attr == NULL) | |
310 | goto nla_put_failure; | |
311 | ||
312 | copy_rtnl_link_stats(nla_data(attr), stats); | |
1da177e4 LT |
313 | } |
314 | } | |
1da177e4 | 315 | |
b60c5115 TG |
316 | if (iwbuf) |
317 | NLA_PUT(skb, IFLA_WIRELESS, iwbuflen, iwbuf); | |
318 | ||
319 | return nlmsg_end(skb, nlh); | |
320 | ||
321 | nla_put_failure: | |
322 | return nlmsg_cancel(skb, nlh); | |
1da177e4 LT |
323 | } |
324 | ||
b60c5115 | 325 | static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) |
1da177e4 LT |
326 | { |
327 | int idx; | |
328 | int s_idx = cb->args[0]; | |
329 | struct net_device *dev; | |
330 | ||
331 | read_lock(&dev_base_lock); | |
332 | for (dev=dev_base, idx=0; dev; dev = dev->next, idx++) { | |
333 | if (idx < s_idx) | |
334 | continue; | |
b60c5115 TG |
335 | if (rtnl_fill_ifinfo(skb, dev, NULL, 0, RTM_NEWLINK, |
336 | NETLINK_CB(cb->skb).pid, | |
337 | cb->nlh->nlmsg_seq, 0, NLM_F_MULTI) <= 0) | |
1da177e4 LT |
338 | break; |
339 | } | |
340 | read_unlock(&dev_base_lock); | |
341 | cb->args[0] = idx; | |
342 | ||
343 | return skb->len; | |
344 | } | |
345 | ||
da5e0494 TG |
346 | static struct nla_policy ifla_policy[IFLA_MAX+1] __read_mostly = { |
347 | [IFLA_IFNAME] = { .type = NLA_STRING }, | |
348 | [IFLA_MAP] = { .minlen = sizeof(struct rtnl_link_ifmap) }, | |
349 | [IFLA_MTU] = { .type = NLA_U32 }, | |
350 | [IFLA_TXQLEN] = { .type = NLA_U32 }, | |
351 | [IFLA_WEIGHT] = { .type = NLA_U32 }, | |
352 | [IFLA_OPERSTATE] = { .type = NLA_U8 }, | |
353 | [IFLA_LINKMODE] = { .type = NLA_U8 }, | |
354 | }; | |
355 | ||
356 | static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
1da177e4 | 357 | { |
da5e0494 | 358 | struct ifinfomsg *ifm; |
1da177e4 | 359 | struct net_device *dev; |
da5e0494 TG |
360 | int err, send_addr_notify = 0, modified = 0; |
361 | struct nlattr *tb[IFLA_MAX+1]; | |
362 | char ifname[IFNAMSIZ]; | |
1da177e4 | 363 | |
da5e0494 TG |
364 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); |
365 | if (err < 0) | |
366 | goto errout; | |
367 | ||
368 | if (tb[IFLA_IFNAME] && | |
369 | nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ) >= IFNAMSIZ) | |
370 | return -EINVAL; | |
371 | ||
372 | err = -EINVAL; | |
373 | ifm = nlmsg_data(nlh); | |
1da177e4 LT |
374 | if (ifm->ifi_index >= 0) |
375 | dev = dev_get_by_index(ifm->ifi_index); | |
da5e0494 | 376 | else if (tb[IFLA_IFNAME]) |
1da177e4 | 377 | dev = dev_get_by_name(ifname); |
da5e0494 TG |
378 | else |
379 | goto errout; | |
1da177e4 | 380 | |
da5e0494 TG |
381 | if (dev == NULL) { |
382 | err = -ENODEV; | |
383 | goto errout; | |
384 | } | |
1da177e4 | 385 | |
da5e0494 TG |
386 | if (tb[IFLA_ADDRESS] && |
387 | nla_len(tb[IFLA_ADDRESS]) < dev->addr_len) | |
388 | goto errout_dev; | |
1da177e4 | 389 | |
da5e0494 TG |
390 | if (tb[IFLA_BROADCAST] && |
391 | nla_len(tb[IFLA_BROADCAST]) < dev->addr_len) | |
392 | goto errout_dev; | |
1da177e4 | 393 | |
da5e0494 | 394 | if (tb[IFLA_MAP]) { |
1da177e4 LT |
395 | struct rtnl_link_ifmap *u_map; |
396 | struct ifmap k_map; | |
397 | ||
398 | if (!dev->set_config) { | |
399 | err = -EOPNOTSUPP; | |
da5e0494 | 400 | goto errout_dev; |
1da177e4 LT |
401 | } |
402 | ||
403 | if (!netif_device_present(dev)) { | |
404 | err = -ENODEV; | |
da5e0494 | 405 | goto errout_dev; |
1da177e4 | 406 | } |
1da177e4 | 407 | |
da5e0494 | 408 | u_map = nla_data(tb[IFLA_MAP]); |
1da177e4 LT |
409 | k_map.mem_start = (unsigned long) u_map->mem_start; |
410 | k_map.mem_end = (unsigned long) u_map->mem_end; | |
411 | k_map.base_addr = (unsigned short) u_map->base_addr; | |
412 | k_map.irq = (unsigned char) u_map->irq; | |
413 | k_map.dma = (unsigned char) u_map->dma; | |
414 | k_map.port = (unsigned char) u_map->port; | |
415 | ||
416 | err = dev->set_config(dev, &k_map); | |
da5e0494 TG |
417 | if (err < 0) |
418 | goto errout_dev; | |
1da177e4 | 419 | |
da5e0494 | 420 | modified = 1; |
1da177e4 LT |
421 | } |
422 | ||
da5e0494 | 423 | if (tb[IFLA_ADDRESS]) { |
70f8e78e DM |
424 | struct sockaddr *sa; |
425 | int len; | |
426 | ||
1da177e4 LT |
427 | if (!dev->set_mac_address) { |
428 | err = -EOPNOTSUPP; | |
da5e0494 | 429 | goto errout_dev; |
1da177e4 | 430 | } |
da5e0494 | 431 | |
1da177e4 LT |
432 | if (!netif_device_present(dev)) { |
433 | err = -ENODEV; | |
da5e0494 | 434 | goto errout_dev; |
1da177e4 | 435 | } |
1da177e4 | 436 | |
70f8e78e DM |
437 | len = sizeof(sa_family_t) + dev->addr_len; |
438 | sa = kmalloc(len, GFP_KERNEL); | |
439 | if (!sa) { | |
440 | err = -ENOMEM; | |
da5e0494 | 441 | goto errout_dev; |
70f8e78e DM |
442 | } |
443 | sa->sa_family = dev->type; | |
da5e0494 | 444 | memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]), |
70f8e78e DM |
445 | dev->addr_len); |
446 | err = dev->set_mac_address(dev, sa); | |
447 | kfree(sa); | |
1da177e4 | 448 | if (err) |
da5e0494 | 449 | goto errout_dev; |
1da177e4 | 450 | send_addr_notify = 1; |
da5e0494 | 451 | modified = 1; |
1da177e4 LT |
452 | } |
453 | ||
da5e0494 TG |
454 | if (tb[IFLA_MTU]) { |
455 | err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU])); | |
456 | if (err < 0) | |
457 | goto errout_dev; | |
458 | modified = 1; | |
1da177e4 LT |
459 | } |
460 | ||
da5e0494 TG |
461 | /* |
462 | * Interface selected by interface index but interface | |
463 | * name provided implies that a name change has been | |
464 | * requested. | |
465 | */ | |
466 | if (ifm->ifi_index >= 0 && ifname[0]) { | |
467 | err = dev_change_name(dev, ifname); | |
468 | if (err < 0) | |
469 | goto errout_dev; | |
470 | modified = 1; | |
1da177e4 LT |
471 | } |
472 | ||
da5e0494 TG |
473 | #ifdef CONFIG_NET_WIRELESS_RTNETLINK |
474 | if (tb[IFLA_WIRELESS]) { | |
475 | /* Call Wireless Extensions. | |
476 | * Various stuff checked in there... */ | |
477 | err = wireless_rtnetlink_set(dev, nla_data(tb[IFLA_WIRELESS]), | |
478 | nla_len(tb[IFLA_WIRELESS])); | |
479 | if (err < 0) | |
480 | goto errout_dev; | |
481 | } | |
482 | #endif /* CONFIG_NET_WIRELESS_RTNETLINK */ | |
1da177e4 | 483 | |
da5e0494 TG |
484 | if (tb[IFLA_BROADCAST]) { |
485 | nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len); | |
486 | send_addr_notify = 1; | |
1da177e4 LT |
487 | } |
488 | ||
1da177e4 | 489 | |
da5e0494 TG |
490 | if (ifm->ifi_flags) |
491 | dev_change_flags(dev, ifm->ifi_flags); | |
1da177e4 | 492 | |
da5e0494 TG |
493 | if (tb[IFLA_TXQLEN]) |
494 | dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]); | |
b00055aa | 495 | |
da5e0494 TG |
496 | if (tb[IFLA_WEIGHT]) |
497 | dev->weight = nla_get_u32(tb[IFLA_WEIGHT]); | |
b00055aa | 498 | |
da5e0494 TG |
499 | if (tb[IFLA_OPERSTATE]) |
500 | set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); | |
b00055aa | 501 | |
da5e0494 | 502 | if (tb[IFLA_LINKMODE]) { |
b00055aa | 503 | write_lock_bh(&dev_base_lock); |
da5e0494 | 504 | dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]); |
b00055aa SR |
505 | write_unlock_bh(&dev_base_lock); |
506 | } | |
507 | ||
1da177e4 LT |
508 | err = 0; |
509 | ||
da5e0494 TG |
510 | errout_dev: |
511 | if (err < 0 && modified && net_ratelimit()) | |
512 | printk(KERN_WARNING "A link change request failed with " | |
513 | "some changes comitted already. Interface %s may " | |
514 | "have been left with an inconsistent configuration, " | |
515 | "please check.\n", dev->name); | |
516 | ||
1da177e4 LT |
517 | if (send_addr_notify) |
518 | call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); | |
519 | ||
520 | dev_put(dev); | |
da5e0494 | 521 | errout: |
1da177e4 LT |
522 | return err; |
523 | } | |
524 | ||
b60c5115 | 525 | static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg) |
711e2c33 | 526 | { |
b60c5115 TG |
527 | struct ifinfomsg *ifm; |
528 | struct nlattr *tb[IFLA_MAX+1]; | |
529 | struct net_device *dev = NULL; | |
530 | struct sk_buff *nskb; | |
531 | char *iw_buf = NULL, *iw = NULL; | |
711e2c33 | 532 | int iw_buf_len = 0; |
b60c5115 | 533 | int err, payload; |
711e2c33 | 534 | |
b60c5115 TG |
535 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); |
536 | if (err < 0) | |
537 | goto errout; | |
538 | ||
539 | ifm = nlmsg_data(nlh); | |
540 | if (ifm->ifi_index >= 0) { | |
711e2c33 | 541 | dev = dev_get_by_index(ifm->ifi_index); |
b60c5115 TG |
542 | if (dev == NULL) |
543 | return -ENODEV; | |
544 | } else | |
711e2c33 | 545 | return -EINVAL; |
711e2c33 | 546 | |
711e2c33 | 547 | |
b60c5115 TG |
548 | #ifdef CONFIG_NET_WIRELESS_RTNETLINK |
549 | if (tb[IFLA_WIRELESS]) { | |
711e2c33 JT |
550 | /* Call Wireless Extensions. We need to know the size before |
551 | * we can alloc. Various stuff checked in there... */ | |
b60c5115 TG |
552 | err = wireless_rtnetlink_get(dev, nla_data(tb[IFLA_WIRELESS]), |
553 | nla_len(tb[IFLA_WIRELESS]), | |
554 | &iw_buf, &iw_buf_len); | |
555 | if (err < 0) | |
556 | goto errout; | |
557 | ||
558 | iw += IW_EV_POINT_OFF; | |
711e2c33 JT |
559 | } |
560 | #endif /* CONFIG_NET_WIRELESS_RTNETLINK */ | |
561 | ||
b60c5115 TG |
562 | payload = NLMSG_ALIGN(sizeof(struct ifinfomsg) + |
563 | nla_total_size(iw_buf_len)); | |
564 | nskb = nlmsg_new(nlmsg_total_size(payload), GFP_KERNEL); | |
565 | if (nskb == NULL) { | |
566 | err = -ENOBUFS; | |
567 | goto errout; | |
568 | } | |
569 | ||
570 | err = rtnl_fill_ifinfo(nskb, dev, iw, iw_buf_len, RTM_NEWLINK, | |
571 | NETLINK_CB(skb).pid, nlh->nlmsg_seq, 0, 0); | |
572 | if (err <= 0) { | |
573 | kfree_skb(skb); | |
574 | goto errout; | |
575 | } | |
576 | ||
577 | err = netlink_unicast(rtnl, skb, NETLINK_CB(skb).pid, MSG_DONTWAIT); | |
711e2c33 JT |
578 | if (err > 0) |
579 | err = 0; | |
b60c5115 TG |
580 | errout: |
581 | kfree(iw_buf); | |
711e2c33 | 582 | dev_put(dev); |
711e2c33 | 583 | |
b60c5115 | 584 | return err; |
711e2c33 | 585 | } |
711e2c33 | 586 | |
b60c5115 | 587 | static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb) |
1da177e4 LT |
588 | { |
589 | int idx; | |
590 | int s_idx = cb->family; | |
591 | ||
592 | if (s_idx == 0) | |
593 | s_idx = 1; | |
594 | for (idx=1; idx<NPROTO; idx++) { | |
595 | int type = cb->nlh->nlmsg_type-RTM_BASE; | |
596 | if (idx < s_idx || idx == PF_PACKET) | |
597 | continue; | |
598 | if (rtnetlink_links[idx] == NULL || | |
599 | rtnetlink_links[idx][type].dumpit == NULL) | |
600 | continue; | |
601 | if (idx > s_idx) | |
602 | memset(&cb->args[0], 0, sizeof(cb->args)); | |
603 | if (rtnetlink_links[idx][type].dumpit(skb, cb)) | |
604 | break; | |
605 | } | |
606 | cb->family = idx; | |
607 | ||
608 | return skb->len; | |
609 | } | |
610 | ||
611 | void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change) | |
612 | { | |
613 | struct sk_buff *skb; | |
614 | int size = NLMSG_SPACE(sizeof(struct ifinfomsg) + | |
615 | sizeof(struct rtnl_link_ifmap) + | |
616 | sizeof(struct rtnl_link_stats) + 128); | |
617 | ||
b60c5115 | 618 | skb = nlmsg_new(size, GFP_KERNEL); |
1da177e4 LT |
619 | if (!skb) |
620 | return; | |
621 | ||
b60c5115 | 622 | if (rtnl_fill_ifinfo(skb, dev, NULL, 0, type, 0, 0, change, 0) < 0) { |
1da177e4 LT |
623 | kfree_skb(skb); |
624 | return; | |
625 | } | |
ac6d439d PM |
626 | NETLINK_CB(skb).dst_group = RTNLGRP_LINK; |
627 | netlink_broadcast(rtnl, skb, 0, RTNLGRP_LINK, GFP_KERNEL); | |
1da177e4 LT |
628 | } |
629 | ||
1da177e4 LT |
630 | /* Protected by RTNL sempahore. */ |
631 | static struct rtattr **rta_buf; | |
632 | static int rtattr_max; | |
633 | ||
634 | /* Process one rtnetlink message. */ | |
635 | ||
636 | static __inline__ int | |
637 | rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, int *errp) | |
638 | { | |
639 | struct rtnetlink_link *link; | |
640 | struct rtnetlink_link *link_tab; | |
641 | int sz_idx, kind; | |
642 | int min_len; | |
643 | int family; | |
644 | int type; | |
645 | int err; | |
646 | ||
647 | /* Only requests are handled by kernel now */ | |
648 | if (!(nlh->nlmsg_flags&NLM_F_REQUEST)) | |
649 | return 0; | |
650 | ||
651 | type = nlh->nlmsg_type; | |
652 | ||
653 | /* A control message: ignore them */ | |
654 | if (type < RTM_BASE) | |
655 | return 0; | |
656 | ||
657 | /* Unknown message: reply with EINVAL */ | |
658 | if (type > RTM_MAX) | |
659 | goto err_inval; | |
660 | ||
661 | type -= RTM_BASE; | |
662 | ||
663 | /* All the messages must have at least 1 byte length */ | |
664 | if (nlh->nlmsg_len < NLMSG_LENGTH(sizeof(struct rtgenmsg))) | |
665 | return 0; | |
666 | ||
667 | family = ((struct rtgenmsg*)NLMSG_DATA(nlh))->rtgen_family; | |
668 | if (family >= NPROTO) { | |
669 | *errp = -EAFNOSUPPORT; | |
670 | return -1; | |
671 | } | |
672 | ||
673 | link_tab = rtnetlink_links[family]; | |
674 | if (link_tab == NULL) | |
675 | link_tab = rtnetlink_links[PF_UNSPEC]; | |
676 | link = &link_tab[type]; | |
677 | ||
678 | sz_idx = type>>2; | |
679 | kind = type&3; | |
680 | ||
c7bdb545 | 681 | if (kind != 2 && security_netlink_recv(skb, CAP_NET_ADMIN)) { |
1da177e4 LT |
682 | *errp = -EPERM; |
683 | return -1; | |
684 | } | |
685 | ||
686 | if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) { | |
1da177e4 LT |
687 | if (link->dumpit == NULL) |
688 | link = &(rtnetlink_links[PF_UNSPEC][type]); | |
689 | ||
690 | if (link->dumpit == NULL) | |
691 | goto err_inval; | |
692 | ||
693 | if ((*errp = netlink_dump_start(rtnl, skb, nlh, | |
a8f74b22 | 694 | link->dumpit, NULL)) != 0) { |
1da177e4 LT |
695 | return -1; |
696 | } | |
9ac4a169 TG |
697 | |
698 | netlink_queue_skip(nlh, skb); | |
1da177e4 LT |
699 | return -1; |
700 | } | |
701 | ||
702 | memset(rta_buf, 0, (rtattr_max * sizeof(struct rtattr *))); | |
703 | ||
704 | min_len = rtm_min[sz_idx]; | |
705 | if (nlh->nlmsg_len < min_len) | |
706 | goto err_inval; | |
707 | ||
708 | if (nlh->nlmsg_len > min_len) { | |
709 | int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len); | |
710 | struct rtattr *attr = (void*)nlh + NLMSG_ALIGN(min_len); | |
711 | ||
712 | while (RTA_OK(attr, attrlen)) { | |
713 | unsigned flavor = attr->rta_type; | |
714 | if (flavor) { | |
715 | if (flavor > rta_max[sz_idx]) | |
716 | goto err_inval; | |
717 | rta_buf[flavor-1] = attr; | |
718 | } | |
719 | attr = RTA_NEXT(attr, attrlen); | |
720 | } | |
721 | } | |
722 | ||
723 | if (link->doit == NULL) | |
724 | link = &(rtnetlink_links[PF_UNSPEC][type]); | |
725 | if (link->doit == NULL) | |
726 | goto err_inval; | |
727 | err = link->doit(skb, nlh, (void *)&rta_buf[0]); | |
728 | ||
729 | *errp = err; | |
730 | return err; | |
731 | ||
732 | err_inval: | |
733 | *errp = -EINVAL; | |
734 | return -1; | |
735 | } | |
736 | ||
1da177e4 LT |
737 | static void rtnetlink_rcv(struct sock *sk, int len) |
738 | { | |
9ac4a169 | 739 | unsigned int qlen = 0; |
2a0a6ebe | 740 | |
1da177e4 | 741 | do { |
6756ae4b | 742 | mutex_lock(&rtnl_mutex); |
9ac4a169 | 743 | netlink_run_queue(sk, &qlen, &rtnetlink_rcv_msg); |
6756ae4b | 744 | mutex_unlock(&rtnl_mutex); |
1da177e4 LT |
745 | |
746 | netdev_run_todo(); | |
2a0a6ebe | 747 | } while (qlen); |
1da177e4 LT |
748 | } |
749 | ||
db46edc6 | 750 | static struct rtnetlink_link link_rtnetlink_table[RTM_NR_MSGTYPES] = |
1da177e4 | 751 | { |
b60c5115 TG |
752 | [RTM_GETLINK - RTM_BASE] = { .doit = rtnl_getlink, |
753 | .dumpit = rtnl_dump_ifinfo }, | |
da5e0494 | 754 | [RTM_SETLINK - RTM_BASE] = { .doit = rtnl_setlink }, |
b60c5115 TG |
755 | [RTM_GETADDR - RTM_BASE] = { .dumpit = rtnl_dump_all }, |
756 | [RTM_GETROUTE - RTM_BASE] = { .dumpit = rtnl_dump_all }, | |
c7fb64db TG |
757 | [RTM_NEWNEIGH - RTM_BASE] = { .doit = neigh_add }, |
758 | [RTM_DELNEIGH - RTM_BASE] = { .doit = neigh_delete }, | |
759 | [RTM_GETNEIGH - RTM_BASE] = { .dumpit = neigh_dump_info }, | |
14c0b97d TG |
760 | #ifdef CONFIG_FIB_RULES |
761 | [RTM_NEWRULE - RTM_BASE] = { .doit = fib_nl_newrule }, | |
762 | [RTM_DELRULE - RTM_BASE] = { .doit = fib_nl_delrule }, | |
763 | #endif | |
b60c5115 | 764 | [RTM_GETRULE - RTM_BASE] = { .dumpit = rtnl_dump_all }, |
c7fb64db TG |
765 | [RTM_GETNEIGHTBL - RTM_BASE] = { .dumpit = neightbl_dump_info }, |
766 | [RTM_SETNEIGHTBL - RTM_BASE] = { .doit = neightbl_set }, | |
1da177e4 LT |
767 | }; |
768 | ||
769 | static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr) | |
770 | { | |
771 | struct net_device *dev = ptr; | |
772 | switch (event) { | |
773 | case NETDEV_UNREGISTER: | |
774 | rtmsg_ifinfo(RTM_DELLINK, dev, ~0U); | |
775 | break; | |
776 | case NETDEV_REGISTER: | |
777 | rtmsg_ifinfo(RTM_NEWLINK, dev, ~0U); | |
778 | break; | |
779 | case NETDEV_UP: | |
780 | case NETDEV_DOWN: | |
781 | rtmsg_ifinfo(RTM_NEWLINK, dev, IFF_UP|IFF_RUNNING); | |
782 | break; | |
783 | case NETDEV_CHANGE: | |
784 | case NETDEV_GOING_DOWN: | |
785 | break; | |
786 | default: | |
787 | rtmsg_ifinfo(RTM_NEWLINK, dev, 0); | |
788 | break; | |
789 | } | |
790 | return NOTIFY_DONE; | |
791 | } | |
792 | ||
793 | static struct notifier_block rtnetlink_dev_notifier = { | |
794 | .notifier_call = rtnetlink_event, | |
795 | }; | |
796 | ||
797 | void __init rtnetlink_init(void) | |
798 | { | |
799 | int i; | |
800 | ||
801 | rtattr_max = 0; | |
802 | for (i = 0; i < ARRAY_SIZE(rta_max); i++) | |
803 | if (rta_max[i] > rtattr_max) | |
804 | rtattr_max = rta_max[i]; | |
805 | rta_buf = kmalloc(rtattr_max * sizeof(struct rtattr *), GFP_KERNEL); | |
806 | if (!rta_buf) | |
807 | panic("rtnetlink_init: cannot allocate rta_buf\n"); | |
808 | ||
06628607 PM |
809 | rtnl = netlink_kernel_create(NETLINK_ROUTE, RTNLGRP_MAX, rtnetlink_rcv, |
810 | THIS_MODULE); | |
1da177e4 LT |
811 | if (rtnl == NULL) |
812 | panic("rtnetlink_init: cannot initialize rtnetlink\n"); | |
813 | netlink_set_nonroot(NETLINK_ROUTE, NL_NONROOT_RECV); | |
814 | register_netdevice_notifier(&rtnetlink_dev_notifier); | |
815 | rtnetlink_links[PF_UNSPEC] = link_rtnetlink_table; | |
816 | rtnetlink_links[PF_PACKET] = link_rtnetlink_table; | |
817 | } | |
818 | ||
819 | EXPORT_SYMBOL(__rta_fill); | |
820 | EXPORT_SYMBOL(rtattr_strlcpy); | |
821 | EXPORT_SYMBOL(rtattr_parse); | |
822 | EXPORT_SYMBOL(rtnetlink_links); | |
823 | EXPORT_SYMBOL(rtnetlink_put_metrics); | |
824 | EXPORT_SYMBOL(rtnl); | |
825 | EXPORT_SYMBOL(rtnl_lock); | |
6756ae4b | 826 | EXPORT_SYMBOL(rtnl_trylock); |
1da177e4 | 827 | EXPORT_SYMBOL(rtnl_unlock); |