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); |
56fc85ac | 61 | static struct sock *rtnl; |
1da177e4 LT |
62 | |
63 | void rtnl_lock(void) | |
64 | { | |
6756ae4b | 65 | mutex_lock(&rtnl_mutex); |
1da177e4 LT |
66 | } |
67 | ||
6756ae4b | 68 | void __rtnl_unlock(void) |
1da177e4 | 69 | { |
6756ae4b | 70 | mutex_unlock(&rtnl_mutex); |
1da177e4 | 71 | } |
6756ae4b | 72 | |
1da177e4 LT |
73 | void rtnl_unlock(void) |
74 | { | |
6756ae4b SH |
75 | mutex_unlock(&rtnl_mutex); |
76 | if (rtnl && rtnl->sk_receive_queue.qlen) | |
77 | rtnl->sk_data_ready(rtnl, 0); | |
1da177e4 LT |
78 | netdev_run_todo(); |
79 | } | |
80 | ||
6756ae4b SH |
81 | int rtnl_trylock(void) |
82 | { | |
83 | return mutex_trylock(&rtnl_mutex); | |
84 | } | |
85 | ||
1da177e4 LT |
86 | int rtattr_parse(struct rtattr *tb[], int maxattr, struct rtattr *rta, int len) |
87 | { | |
88 | memset(tb, 0, sizeof(struct rtattr*)*maxattr); | |
89 | ||
90 | while (RTA_OK(rta, len)) { | |
91 | unsigned flavor = rta->rta_type; | |
92 | if (flavor && flavor <= maxattr) | |
93 | tb[flavor-1] = rta; | |
94 | rta = RTA_NEXT(rta, len); | |
95 | } | |
96 | return 0; | |
97 | } | |
98 | ||
1da177e4 LT |
99 | struct rtnetlink_link * rtnetlink_links[NPROTO]; |
100 | ||
db46edc6 | 101 | static const int rtm_min[RTM_NR_FAMILIES] = |
1da177e4 | 102 | { |
f90a0a74 TG |
103 | [RTM_FAM(RTM_NEWLINK)] = NLMSG_LENGTH(sizeof(struct ifinfomsg)), |
104 | [RTM_FAM(RTM_NEWADDR)] = NLMSG_LENGTH(sizeof(struct ifaddrmsg)), | |
105 | [RTM_FAM(RTM_NEWROUTE)] = NLMSG_LENGTH(sizeof(struct rtmsg)), | |
14c0b97d | 106 | [RTM_FAM(RTM_NEWRULE)] = NLMSG_LENGTH(sizeof(struct fib_rule_hdr)), |
f90a0a74 TG |
107 | [RTM_FAM(RTM_NEWQDISC)] = NLMSG_LENGTH(sizeof(struct tcmsg)), |
108 | [RTM_FAM(RTM_NEWTCLASS)] = NLMSG_LENGTH(sizeof(struct tcmsg)), | |
109 | [RTM_FAM(RTM_NEWTFILTER)] = NLMSG_LENGTH(sizeof(struct tcmsg)), | |
110 | [RTM_FAM(RTM_NEWACTION)] = NLMSG_LENGTH(sizeof(struct tcamsg)), | |
f90a0a74 TG |
111 | [RTM_FAM(RTM_GETMULTICAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)), |
112 | [RTM_FAM(RTM_GETANYCAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)), | |
1da177e4 LT |
113 | }; |
114 | ||
db46edc6 | 115 | static const int rta_max[RTM_NR_FAMILIES] = |
1da177e4 | 116 | { |
f90a0a74 TG |
117 | [RTM_FAM(RTM_NEWLINK)] = IFLA_MAX, |
118 | [RTM_FAM(RTM_NEWADDR)] = IFA_MAX, | |
119 | [RTM_FAM(RTM_NEWROUTE)] = RTA_MAX, | |
14c0b97d | 120 | [RTM_FAM(RTM_NEWRULE)] = FRA_MAX, |
f90a0a74 TG |
121 | [RTM_FAM(RTM_NEWQDISC)] = TCA_MAX, |
122 | [RTM_FAM(RTM_NEWTCLASS)] = TCA_MAX, | |
123 | [RTM_FAM(RTM_NEWTFILTER)] = TCA_MAX, | |
124 | [RTM_FAM(RTM_NEWACTION)] = TCAA_MAX, | |
1da177e4 LT |
125 | }; |
126 | ||
127 | void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data) | |
128 | { | |
129 | struct rtattr *rta; | |
130 | int size = RTA_LENGTH(attrlen); | |
131 | ||
132 | rta = (struct rtattr*)skb_put(skb, RTA_ALIGN(size)); | |
133 | rta->rta_type = attrtype; | |
134 | rta->rta_len = size; | |
135 | memcpy(RTA_DATA(rta), data, attrlen); | |
b3563c4f | 136 | memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size); |
1da177e4 LT |
137 | } |
138 | ||
139 | size_t rtattr_strlcpy(char *dest, const struct rtattr *rta, size_t size) | |
140 | { | |
141 | size_t ret = RTA_PAYLOAD(rta); | |
142 | char *src = RTA_DATA(rta); | |
143 | ||
144 | if (ret > 0 && src[ret - 1] == '\0') | |
145 | ret--; | |
146 | if (size > 0) { | |
147 | size_t len = (ret >= size) ? size - 1 : ret; | |
148 | memset(dest, 0, size); | |
149 | memcpy(dest, src, len); | |
150 | } | |
151 | return ret; | |
152 | } | |
153 | ||
154 | int rtnetlink_send(struct sk_buff *skb, u32 pid, unsigned group, int echo) | |
155 | { | |
156 | int err = 0; | |
157 | ||
ac6d439d | 158 | NETLINK_CB(skb).dst_group = group; |
1da177e4 LT |
159 | if (echo) |
160 | atomic_inc(&skb->users); | |
161 | netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL); | |
162 | if (echo) | |
163 | err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT); | |
164 | return err; | |
165 | } | |
166 | ||
2942e900 TG |
167 | int rtnl_unicast(struct sk_buff *skb, u32 pid) |
168 | { | |
169 | return nlmsg_unicast(rtnl, skb, pid); | |
170 | } | |
171 | ||
97676b6b TG |
172 | int rtnl_notify(struct sk_buff *skb, u32 pid, u32 group, |
173 | struct nlmsghdr *nlh, gfp_t flags) | |
174 | { | |
175 | int report = 0; | |
176 | ||
177 | if (nlh) | |
178 | report = nlmsg_report(nlh); | |
179 | ||
180 | return nlmsg_notify(rtnl, skb, pid, group, report, flags); | |
181 | } | |
182 | ||
183 | void rtnl_set_sk_err(u32 group, int error) | |
184 | { | |
185 | netlink_set_err(rtnl, 0, group, error); | |
186 | } | |
187 | ||
1da177e4 LT |
188 | int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics) |
189 | { | |
2d7202bf TG |
190 | struct nlattr *mx; |
191 | int i, valid = 0; | |
192 | ||
193 | mx = nla_nest_start(skb, RTA_METRICS); | |
194 | if (mx == NULL) | |
195 | return -ENOBUFS; | |
196 | ||
197 | for (i = 0; i < RTAX_MAX; i++) { | |
198 | if (metrics[i]) { | |
199 | valid++; | |
200 | NLA_PUT_U32(skb, i+1, metrics[i]); | |
201 | } | |
1da177e4 | 202 | } |
1da177e4 | 203 | |
a57d27fc DM |
204 | if (!valid) { |
205 | nla_nest_cancel(skb, mx); | |
206 | return 0; | |
207 | } | |
2d7202bf TG |
208 | |
209 | return nla_nest_end(skb, mx); | |
210 | ||
211 | nla_put_failure: | |
212 | return nla_nest_cancel(skb, mx); | |
1da177e4 LT |
213 | } |
214 | ||
e3703b3d TG |
215 | int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id, |
216 | u32 ts, u32 tsage, long expires, u32 error) | |
217 | { | |
218 | struct rta_cacheinfo ci = { | |
219 | .rta_lastuse = jiffies_to_clock_t(jiffies - dst->lastuse), | |
220 | .rta_used = dst->__use, | |
221 | .rta_clntref = atomic_read(&(dst->__refcnt)), | |
222 | .rta_error = error, | |
223 | .rta_id = id, | |
224 | .rta_ts = ts, | |
225 | .rta_tsage = tsage, | |
226 | }; | |
227 | ||
228 | if (expires) | |
229 | ci.rta_expires = jiffies_to_clock_t(expires); | |
230 | ||
231 | return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci); | |
232 | } | |
233 | ||
234 | EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo); | |
1da177e4 | 235 | |
b00055aa SR |
236 | static void set_operstate(struct net_device *dev, unsigned char transition) |
237 | { | |
238 | unsigned char operstate = dev->operstate; | |
239 | ||
240 | switch(transition) { | |
241 | case IF_OPER_UP: | |
242 | if ((operstate == IF_OPER_DORMANT || | |
243 | operstate == IF_OPER_UNKNOWN) && | |
244 | !netif_dormant(dev)) | |
245 | operstate = IF_OPER_UP; | |
246 | break; | |
247 | ||
248 | case IF_OPER_DORMANT: | |
249 | if (operstate == IF_OPER_UP || | |
250 | operstate == IF_OPER_UNKNOWN) | |
251 | operstate = IF_OPER_DORMANT; | |
252 | break; | |
253 | }; | |
254 | ||
255 | if (dev->operstate != operstate) { | |
256 | write_lock_bh(&dev_base_lock); | |
257 | dev->operstate = operstate; | |
258 | write_unlock_bh(&dev_base_lock); | |
259 | netdev_state_change(dev); | |
260 | } | |
261 | } | |
262 | ||
b60c5115 TG |
263 | static void copy_rtnl_link_stats(struct rtnl_link_stats *a, |
264 | struct net_device_stats *b) | |
1da177e4 | 265 | { |
b60c5115 TG |
266 | a->rx_packets = b->rx_packets; |
267 | a->tx_packets = b->tx_packets; | |
268 | a->rx_bytes = b->rx_bytes; | |
269 | a->tx_bytes = b->tx_bytes; | |
270 | a->rx_errors = b->rx_errors; | |
271 | a->tx_errors = b->tx_errors; | |
272 | a->rx_dropped = b->rx_dropped; | |
273 | a->tx_dropped = b->tx_dropped; | |
274 | ||
275 | a->multicast = b->multicast; | |
276 | a->collisions = b->collisions; | |
277 | ||
278 | a->rx_length_errors = b->rx_length_errors; | |
279 | a->rx_over_errors = b->rx_over_errors; | |
280 | a->rx_crc_errors = b->rx_crc_errors; | |
281 | a->rx_frame_errors = b->rx_frame_errors; | |
282 | a->rx_fifo_errors = b->rx_fifo_errors; | |
283 | a->rx_missed_errors = b->rx_missed_errors; | |
284 | ||
285 | a->tx_aborted_errors = b->tx_aborted_errors; | |
286 | a->tx_carrier_errors = b->tx_carrier_errors; | |
287 | a->tx_fifo_errors = b->tx_fifo_errors; | |
288 | a->tx_heartbeat_errors = b->tx_heartbeat_errors; | |
289 | a->tx_window_errors = b->tx_window_errors; | |
290 | ||
291 | a->rx_compressed = b->rx_compressed; | |
292 | a->tx_compressed = b->tx_compressed; | |
293 | }; | |
1da177e4 | 294 | |
339bf98f TG |
295 | static inline size_t if_nlmsg_size(int iwbuflen) |
296 | { | |
297 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
298 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
299 | + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */ | |
300 | + nla_total_size(sizeof(struct rtnl_link_ifmap)) | |
301 | + nla_total_size(sizeof(struct rtnl_link_stats)) | |
302 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ | |
303 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */ | |
304 | + nla_total_size(4) /* IFLA_TXQLEN */ | |
305 | + nla_total_size(4) /* IFLA_WEIGHT */ | |
306 | + nla_total_size(4) /* IFLA_MTU */ | |
307 | + nla_total_size(4) /* IFLA_LINK */ | |
308 | + nla_total_size(4) /* IFLA_MASTER */ | |
309 | + nla_total_size(1) /* IFLA_OPERSTATE */ | |
310 | + nla_total_size(1) /* IFLA_LINKMODE */ | |
311 | + nla_total_size(iwbuflen); | |
312 | } | |
313 | ||
b60c5115 TG |
314 | static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev, |
315 | void *iwbuf, int iwbuflen, int type, u32 pid, | |
316 | u32 seq, u32 change, unsigned int flags) | |
317 | { | |
318 | struct ifinfomsg *ifm; | |
319 | struct nlmsghdr *nlh; | |
1da177e4 | 320 | |
b60c5115 TG |
321 | nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags); |
322 | if (nlh == NULL) | |
26932566 | 323 | return -EMSGSIZE; |
1da177e4 | 324 | |
b60c5115 TG |
325 | ifm = nlmsg_data(nlh); |
326 | ifm->ifi_family = AF_UNSPEC; | |
327 | ifm->__ifi_pad = 0; | |
328 | ifm->ifi_type = dev->type; | |
329 | ifm->ifi_index = dev->ifindex; | |
330 | ifm->ifi_flags = dev_get_flags(dev); | |
331 | ifm->ifi_change = change; | |
332 | ||
333 | NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name); | |
334 | NLA_PUT_U32(skb, IFLA_TXQLEN, dev->tx_queue_len); | |
335 | NLA_PUT_U32(skb, IFLA_WEIGHT, dev->weight); | |
336 | NLA_PUT_U8(skb, IFLA_OPERSTATE, | |
337 | netif_running(dev) ? dev->operstate : IF_OPER_DOWN); | |
338 | NLA_PUT_U8(skb, IFLA_LINKMODE, dev->link_mode); | |
339 | NLA_PUT_U32(skb, IFLA_MTU, dev->mtu); | |
340 | ||
341 | if (dev->ifindex != dev->iflink) | |
342 | NLA_PUT_U32(skb, IFLA_LINK, dev->iflink); | |
343 | ||
344 | if (dev->master) | |
345 | NLA_PUT_U32(skb, IFLA_MASTER, dev->master->ifindex); | |
1da177e4 | 346 | |
b60c5115 TG |
347 | if (dev->qdisc_sleeping) |
348 | NLA_PUT_STRING(skb, IFLA_QDISC, dev->qdisc_sleeping->ops->id); | |
b00055aa | 349 | |
1da177e4 LT |
350 | if (1) { |
351 | struct rtnl_link_ifmap map = { | |
352 | .mem_start = dev->mem_start, | |
353 | .mem_end = dev->mem_end, | |
354 | .base_addr = dev->base_addr, | |
355 | .irq = dev->irq, | |
356 | .dma = dev->dma, | |
357 | .port = dev->if_port, | |
358 | }; | |
b60c5115 | 359 | NLA_PUT(skb, IFLA_MAP, sizeof(map), &map); |
1da177e4 LT |
360 | } |
361 | ||
362 | if (dev->addr_len) { | |
b60c5115 TG |
363 | NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr); |
364 | NLA_PUT(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast); | |
1da177e4 LT |
365 | } |
366 | ||
367 | if (dev->get_stats) { | |
b60c5115 | 368 | struct net_device_stats *stats = dev->get_stats(dev); |
1da177e4 | 369 | if (stats) { |
b60c5115 TG |
370 | struct nlattr *attr; |
371 | ||
372 | attr = nla_reserve(skb, IFLA_STATS, | |
373 | sizeof(struct rtnl_link_stats)); | |
374 | if (attr == NULL) | |
375 | goto nla_put_failure; | |
376 | ||
377 | copy_rtnl_link_stats(nla_data(attr), stats); | |
1da177e4 LT |
378 | } |
379 | } | |
1da177e4 | 380 | |
b60c5115 TG |
381 | if (iwbuf) |
382 | NLA_PUT(skb, IFLA_WIRELESS, iwbuflen, iwbuf); | |
383 | ||
384 | return nlmsg_end(skb, nlh); | |
385 | ||
386 | nla_put_failure: | |
26932566 PM |
387 | nlmsg_cancel(skb, nlh); |
388 | return -EMSGSIZE; | |
1da177e4 LT |
389 | } |
390 | ||
b60c5115 | 391 | static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) |
1da177e4 LT |
392 | { |
393 | int idx; | |
394 | int s_idx = cb->args[0]; | |
395 | struct net_device *dev; | |
396 | ||
397 | read_lock(&dev_base_lock); | |
398 | for (dev=dev_base, idx=0; dev; dev = dev->next, idx++) { | |
399 | if (idx < s_idx) | |
400 | continue; | |
b60c5115 TG |
401 | if (rtnl_fill_ifinfo(skb, dev, NULL, 0, RTM_NEWLINK, |
402 | NETLINK_CB(cb->skb).pid, | |
403 | cb->nlh->nlmsg_seq, 0, NLM_F_MULTI) <= 0) | |
1da177e4 LT |
404 | break; |
405 | } | |
406 | read_unlock(&dev_base_lock); | |
407 | cb->args[0] = idx; | |
408 | ||
409 | return skb->len; | |
410 | } | |
411 | ||
da5e0494 | 412 | static struct nla_policy ifla_policy[IFLA_MAX+1] __read_mostly = { |
5176f91e TG |
413 | [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 }, |
414 | [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) }, | |
da5e0494 TG |
415 | [IFLA_MTU] = { .type = NLA_U32 }, |
416 | [IFLA_TXQLEN] = { .type = NLA_U32 }, | |
417 | [IFLA_WEIGHT] = { .type = NLA_U32 }, | |
418 | [IFLA_OPERSTATE] = { .type = NLA_U8 }, | |
419 | [IFLA_LINKMODE] = { .type = NLA_U8 }, | |
420 | }; | |
421 | ||
422 | static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | |
1da177e4 | 423 | { |
da5e0494 | 424 | struct ifinfomsg *ifm; |
1da177e4 | 425 | struct net_device *dev; |
da5e0494 TG |
426 | int err, send_addr_notify = 0, modified = 0; |
427 | struct nlattr *tb[IFLA_MAX+1]; | |
428 | char ifname[IFNAMSIZ]; | |
1da177e4 | 429 | |
da5e0494 TG |
430 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); |
431 | if (err < 0) | |
432 | goto errout; | |
433 | ||
5176f91e TG |
434 | if (tb[IFLA_IFNAME]) |
435 | nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); | |
78e5b891 PM |
436 | else |
437 | ifname[0] = '\0'; | |
da5e0494 TG |
438 | |
439 | err = -EINVAL; | |
440 | ifm = nlmsg_data(nlh); | |
1da177e4 LT |
441 | if (ifm->ifi_index >= 0) |
442 | dev = dev_get_by_index(ifm->ifi_index); | |
da5e0494 | 443 | else if (tb[IFLA_IFNAME]) |
1da177e4 | 444 | dev = dev_get_by_name(ifname); |
da5e0494 TG |
445 | else |
446 | goto errout; | |
1da177e4 | 447 | |
da5e0494 TG |
448 | if (dev == NULL) { |
449 | err = -ENODEV; | |
450 | goto errout; | |
451 | } | |
1da177e4 | 452 | |
da5e0494 TG |
453 | if (tb[IFLA_ADDRESS] && |
454 | nla_len(tb[IFLA_ADDRESS]) < dev->addr_len) | |
455 | goto errout_dev; | |
1da177e4 | 456 | |
da5e0494 TG |
457 | if (tb[IFLA_BROADCAST] && |
458 | nla_len(tb[IFLA_BROADCAST]) < dev->addr_len) | |
459 | goto errout_dev; | |
1da177e4 | 460 | |
da5e0494 | 461 | if (tb[IFLA_MAP]) { |
1da177e4 LT |
462 | struct rtnl_link_ifmap *u_map; |
463 | struct ifmap k_map; | |
464 | ||
465 | if (!dev->set_config) { | |
466 | err = -EOPNOTSUPP; | |
da5e0494 | 467 | goto errout_dev; |
1da177e4 LT |
468 | } |
469 | ||
470 | if (!netif_device_present(dev)) { | |
471 | err = -ENODEV; | |
da5e0494 | 472 | goto errout_dev; |
1da177e4 | 473 | } |
1da177e4 | 474 | |
da5e0494 | 475 | u_map = nla_data(tb[IFLA_MAP]); |
1da177e4 LT |
476 | k_map.mem_start = (unsigned long) u_map->mem_start; |
477 | k_map.mem_end = (unsigned long) u_map->mem_end; | |
478 | k_map.base_addr = (unsigned short) u_map->base_addr; | |
479 | k_map.irq = (unsigned char) u_map->irq; | |
480 | k_map.dma = (unsigned char) u_map->dma; | |
481 | k_map.port = (unsigned char) u_map->port; | |
482 | ||
483 | err = dev->set_config(dev, &k_map); | |
da5e0494 TG |
484 | if (err < 0) |
485 | goto errout_dev; | |
1da177e4 | 486 | |
da5e0494 | 487 | modified = 1; |
1da177e4 LT |
488 | } |
489 | ||
da5e0494 | 490 | if (tb[IFLA_ADDRESS]) { |
70f8e78e DM |
491 | struct sockaddr *sa; |
492 | int len; | |
493 | ||
1da177e4 LT |
494 | if (!dev->set_mac_address) { |
495 | err = -EOPNOTSUPP; | |
da5e0494 | 496 | goto errout_dev; |
1da177e4 | 497 | } |
da5e0494 | 498 | |
1da177e4 LT |
499 | if (!netif_device_present(dev)) { |
500 | err = -ENODEV; | |
da5e0494 | 501 | goto errout_dev; |
1da177e4 | 502 | } |
1da177e4 | 503 | |
70f8e78e DM |
504 | len = sizeof(sa_family_t) + dev->addr_len; |
505 | sa = kmalloc(len, GFP_KERNEL); | |
506 | if (!sa) { | |
507 | err = -ENOMEM; | |
da5e0494 | 508 | goto errout_dev; |
70f8e78e DM |
509 | } |
510 | sa->sa_family = dev->type; | |
da5e0494 | 511 | memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]), |
70f8e78e DM |
512 | dev->addr_len); |
513 | err = dev->set_mac_address(dev, sa); | |
514 | kfree(sa); | |
1da177e4 | 515 | if (err) |
da5e0494 | 516 | goto errout_dev; |
1da177e4 | 517 | send_addr_notify = 1; |
da5e0494 | 518 | modified = 1; |
1da177e4 LT |
519 | } |
520 | ||
da5e0494 TG |
521 | if (tb[IFLA_MTU]) { |
522 | err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU])); | |
523 | if (err < 0) | |
524 | goto errout_dev; | |
525 | modified = 1; | |
1da177e4 LT |
526 | } |
527 | ||
da5e0494 TG |
528 | /* |
529 | * Interface selected by interface index but interface | |
530 | * name provided implies that a name change has been | |
531 | * requested. | |
532 | */ | |
533 | if (ifm->ifi_index >= 0 && ifname[0]) { | |
534 | err = dev_change_name(dev, ifname); | |
535 | if (err < 0) | |
536 | goto errout_dev; | |
537 | modified = 1; | |
1da177e4 LT |
538 | } |
539 | ||
da5e0494 TG |
540 | #ifdef CONFIG_NET_WIRELESS_RTNETLINK |
541 | if (tb[IFLA_WIRELESS]) { | |
542 | /* Call Wireless Extensions. | |
543 | * Various stuff checked in there... */ | |
544 | err = wireless_rtnetlink_set(dev, nla_data(tb[IFLA_WIRELESS]), | |
545 | nla_len(tb[IFLA_WIRELESS])); | |
546 | if (err < 0) | |
547 | goto errout_dev; | |
548 | } | |
549 | #endif /* CONFIG_NET_WIRELESS_RTNETLINK */ | |
1da177e4 | 550 | |
da5e0494 TG |
551 | if (tb[IFLA_BROADCAST]) { |
552 | nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len); | |
553 | send_addr_notify = 1; | |
1da177e4 LT |
554 | } |
555 | ||
1da177e4 | 556 | |
da5e0494 TG |
557 | if (ifm->ifi_flags) |
558 | dev_change_flags(dev, ifm->ifi_flags); | |
1da177e4 | 559 | |
da5e0494 TG |
560 | if (tb[IFLA_TXQLEN]) |
561 | dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]); | |
b00055aa | 562 | |
da5e0494 TG |
563 | if (tb[IFLA_WEIGHT]) |
564 | dev->weight = nla_get_u32(tb[IFLA_WEIGHT]); | |
b00055aa | 565 | |
da5e0494 TG |
566 | if (tb[IFLA_OPERSTATE]) |
567 | set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); | |
b00055aa | 568 | |
da5e0494 | 569 | if (tb[IFLA_LINKMODE]) { |
b00055aa | 570 | write_lock_bh(&dev_base_lock); |
da5e0494 | 571 | dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]); |
b00055aa SR |
572 | write_unlock_bh(&dev_base_lock); |
573 | } | |
574 | ||
1da177e4 LT |
575 | err = 0; |
576 | ||
da5e0494 TG |
577 | errout_dev: |
578 | if (err < 0 && modified && net_ratelimit()) | |
579 | printk(KERN_WARNING "A link change request failed with " | |
580 | "some changes comitted already. Interface %s may " | |
581 | "have been left with an inconsistent configuration, " | |
582 | "please check.\n", dev->name); | |
583 | ||
1da177e4 LT |
584 | if (send_addr_notify) |
585 | call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); | |
586 | ||
587 | dev_put(dev); | |
da5e0494 | 588 | errout: |
1da177e4 LT |
589 | return err; |
590 | } | |
591 | ||
b60c5115 | 592 | static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg) |
711e2c33 | 593 | { |
b60c5115 TG |
594 | struct ifinfomsg *ifm; |
595 | struct nlattr *tb[IFLA_MAX+1]; | |
596 | struct net_device *dev = NULL; | |
597 | struct sk_buff *nskb; | |
598 | char *iw_buf = NULL, *iw = NULL; | |
711e2c33 | 599 | int iw_buf_len = 0; |
339bf98f | 600 | int err; |
711e2c33 | 601 | |
b60c5115 TG |
602 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); |
603 | if (err < 0) | |
9918f230 | 604 | return err; |
b60c5115 TG |
605 | |
606 | ifm = nlmsg_data(nlh); | |
607 | if (ifm->ifi_index >= 0) { | |
711e2c33 | 608 | dev = dev_get_by_index(ifm->ifi_index); |
b60c5115 TG |
609 | if (dev == NULL) |
610 | return -ENODEV; | |
611 | } else | |
711e2c33 | 612 | return -EINVAL; |
711e2c33 | 613 | |
711e2c33 | 614 | |
b60c5115 TG |
615 | #ifdef CONFIG_NET_WIRELESS_RTNETLINK |
616 | if (tb[IFLA_WIRELESS]) { | |
711e2c33 JT |
617 | /* Call Wireless Extensions. We need to know the size before |
618 | * we can alloc. Various stuff checked in there... */ | |
b60c5115 TG |
619 | err = wireless_rtnetlink_get(dev, nla_data(tb[IFLA_WIRELESS]), |
620 | nla_len(tb[IFLA_WIRELESS]), | |
621 | &iw_buf, &iw_buf_len); | |
622 | if (err < 0) | |
623 | goto errout; | |
624 | ||
625 | iw += IW_EV_POINT_OFF; | |
711e2c33 JT |
626 | } |
627 | #endif /* CONFIG_NET_WIRELESS_RTNETLINK */ | |
628 | ||
339bf98f | 629 | nskb = nlmsg_new(if_nlmsg_size(iw_buf_len), GFP_KERNEL); |
b60c5115 TG |
630 | if (nskb == NULL) { |
631 | err = -ENOBUFS; | |
632 | goto errout; | |
633 | } | |
634 | ||
635 | err = rtnl_fill_ifinfo(nskb, dev, iw, iw_buf_len, RTM_NEWLINK, | |
636 | NETLINK_CB(skb).pid, nlh->nlmsg_seq, 0, 0); | |
26932566 PM |
637 | if (err < 0) { |
638 | /* -EMSGSIZE implies BUG in if_nlmsg_size */ | |
639 | WARN_ON(err == -EMSGSIZE); | |
640 | kfree_skb(nskb); | |
641 | goto errout; | |
642 | } | |
b974179a | 643 | err = rtnl_unicast(nskb, NETLINK_CB(skb).pid); |
b60c5115 TG |
644 | errout: |
645 | kfree(iw_buf); | |
711e2c33 | 646 | dev_put(dev); |
711e2c33 | 647 | |
b60c5115 | 648 | return err; |
711e2c33 | 649 | } |
711e2c33 | 650 | |
b60c5115 | 651 | static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb) |
1da177e4 LT |
652 | { |
653 | int idx; | |
654 | int s_idx = cb->family; | |
655 | ||
656 | if (s_idx == 0) | |
657 | s_idx = 1; | |
658 | for (idx=1; idx<NPROTO; idx++) { | |
659 | int type = cb->nlh->nlmsg_type-RTM_BASE; | |
660 | if (idx < s_idx || idx == PF_PACKET) | |
661 | continue; | |
662 | if (rtnetlink_links[idx] == NULL || | |
663 | rtnetlink_links[idx][type].dumpit == NULL) | |
664 | continue; | |
665 | if (idx > s_idx) | |
666 | memset(&cb->args[0], 0, sizeof(cb->args)); | |
667 | if (rtnetlink_links[idx][type].dumpit(skb, cb)) | |
668 | break; | |
669 | } | |
670 | cb->family = idx; | |
671 | ||
672 | return skb->len; | |
673 | } | |
674 | ||
675 | void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change) | |
676 | { | |
677 | struct sk_buff *skb; | |
0ec6d3f4 | 678 | int err = -ENOBUFS; |
1da177e4 | 679 | |
339bf98f | 680 | skb = nlmsg_new(if_nlmsg_size(0), GFP_KERNEL); |
0ec6d3f4 TG |
681 | if (skb == NULL) |
682 | goto errout; | |
1da177e4 | 683 | |
0ec6d3f4 | 684 | err = rtnl_fill_ifinfo(skb, dev, NULL, 0, type, 0, 0, change, 0); |
26932566 PM |
685 | if (err < 0) { |
686 | /* -EMSGSIZE implies BUG in if_nlmsg_size() */ | |
687 | WARN_ON(err == -EMSGSIZE); | |
688 | kfree_skb(skb); | |
689 | goto errout; | |
690 | } | |
0ec6d3f4 TG |
691 | err = rtnl_notify(skb, 0, RTNLGRP_LINK, NULL, GFP_KERNEL); |
692 | errout: | |
693 | if (err < 0) | |
694 | rtnl_set_sk_err(RTNLGRP_LINK, err); | |
1da177e4 LT |
695 | } |
696 | ||
1da177e4 LT |
697 | /* Protected by RTNL sempahore. */ |
698 | static struct rtattr **rta_buf; | |
699 | static int rtattr_max; | |
700 | ||
701 | /* Process one rtnetlink message. */ | |
702 | ||
703 | static __inline__ int | |
704 | rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, int *errp) | |
705 | { | |
706 | struct rtnetlink_link *link; | |
707 | struct rtnetlink_link *link_tab; | |
708 | int sz_idx, kind; | |
709 | int min_len; | |
710 | int family; | |
711 | int type; | |
712 | int err; | |
713 | ||
714 | /* Only requests are handled by kernel now */ | |
715 | if (!(nlh->nlmsg_flags&NLM_F_REQUEST)) | |
716 | return 0; | |
717 | ||
718 | type = nlh->nlmsg_type; | |
719 | ||
720 | /* A control message: ignore them */ | |
721 | if (type < RTM_BASE) | |
722 | return 0; | |
723 | ||
724 | /* Unknown message: reply with EINVAL */ | |
725 | if (type > RTM_MAX) | |
726 | goto err_inval; | |
727 | ||
728 | type -= RTM_BASE; | |
729 | ||
730 | /* All the messages must have at least 1 byte length */ | |
731 | if (nlh->nlmsg_len < NLMSG_LENGTH(sizeof(struct rtgenmsg))) | |
732 | return 0; | |
733 | ||
734 | family = ((struct rtgenmsg*)NLMSG_DATA(nlh))->rtgen_family; | |
735 | if (family >= NPROTO) { | |
736 | *errp = -EAFNOSUPPORT; | |
737 | return -1; | |
738 | } | |
739 | ||
740 | link_tab = rtnetlink_links[family]; | |
741 | if (link_tab == NULL) | |
742 | link_tab = rtnetlink_links[PF_UNSPEC]; | |
743 | link = &link_tab[type]; | |
744 | ||
745 | sz_idx = type>>2; | |
746 | kind = type&3; | |
747 | ||
c7bdb545 | 748 | if (kind != 2 && security_netlink_recv(skb, CAP_NET_ADMIN)) { |
1da177e4 LT |
749 | *errp = -EPERM; |
750 | return -1; | |
751 | } | |
752 | ||
753 | if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) { | |
1da177e4 LT |
754 | if (link->dumpit == NULL) |
755 | link = &(rtnetlink_links[PF_UNSPEC][type]); | |
756 | ||
757 | if (link->dumpit == NULL) | |
758 | goto err_inval; | |
759 | ||
760 | if ((*errp = netlink_dump_start(rtnl, skb, nlh, | |
a8f74b22 | 761 | link->dumpit, NULL)) != 0) { |
1da177e4 LT |
762 | return -1; |
763 | } | |
9ac4a169 TG |
764 | |
765 | netlink_queue_skip(nlh, skb); | |
1da177e4 LT |
766 | return -1; |
767 | } | |
768 | ||
769 | memset(rta_buf, 0, (rtattr_max * sizeof(struct rtattr *))); | |
770 | ||
771 | min_len = rtm_min[sz_idx]; | |
772 | if (nlh->nlmsg_len < min_len) | |
773 | goto err_inval; | |
774 | ||
775 | if (nlh->nlmsg_len > min_len) { | |
776 | int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len); | |
777 | struct rtattr *attr = (void*)nlh + NLMSG_ALIGN(min_len); | |
778 | ||
779 | while (RTA_OK(attr, attrlen)) { | |
780 | unsigned flavor = attr->rta_type; | |
781 | if (flavor) { | |
782 | if (flavor > rta_max[sz_idx]) | |
783 | goto err_inval; | |
784 | rta_buf[flavor-1] = attr; | |
785 | } | |
786 | attr = RTA_NEXT(attr, attrlen); | |
787 | } | |
788 | } | |
789 | ||
790 | if (link->doit == NULL) | |
791 | link = &(rtnetlink_links[PF_UNSPEC][type]); | |
792 | if (link->doit == NULL) | |
793 | goto err_inval; | |
794 | err = link->doit(skb, nlh, (void *)&rta_buf[0]); | |
795 | ||
796 | *errp = err; | |
797 | return err; | |
798 | ||
799 | err_inval: | |
800 | *errp = -EINVAL; | |
801 | return -1; | |
802 | } | |
803 | ||
1da177e4 LT |
804 | static void rtnetlink_rcv(struct sock *sk, int len) |
805 | { | |
9ac4a169 | 806 | unsigned int qlen = 0; |
2a0a6ebe | 807 | |
1da177e4 | 808 | do { |
6756ae4b | 809 | mutex_lock(&rtnl_mutex); |
9ac4a169 | 810 | netlink_run_queue(sk, &qlen, &rtnetlink_rcv_msg); |
6756ae4b | 811 | mutex_unlock(&rtnl_mutex); |
1da177e4 LT |
812 | |
813 | netdev_run_todo(); | |
2a0a6ebe | 814 | } while (qlen); |
1da177e4 LT |
815 | } |
816 | ||
db46edc6 | 817 | static struct rtnetlink_link link_rtnetlink_table[RTM_NR_MSGTYPES] = |
1da177e4 | 818 | { |
b60c5115 TG |
819 | [RTM_GETLINK - RTM_BASE] = { .doit = rtnl_getlink, |
820 | .dumpit = rtnl_dump_ifinfo }, | |
da5e0494 | 821 | [RTM_SETLINK - RTM_BASE] = { .doit = rtnl_setlink }, |
b60c5115 TG |
822 | [RTM_GETADDR - RTM_BASE] = { .dumpit = rtnl_dump_all }, |
823 | [RTM_GETROUTE - RTM_BASE] = { .dumpit = rtnl_dump_all }, | |
c7fb64db TG |
824 | [RTM_NEWNEIGH - RTM_BASE] = { .doit = neigh_add }, |
825 | [RTM_DELNEIGH - RTM_BASE] = { .doit = neigh_delete }, | |
826 | [RTM_GETNEIGH - RTM_BASE] = { .dumpit = neigh_dump_info }, | |
14c0b97d TG |
827 | #ifdef CONFIG_FIB_RULES |
828 | [RTM_NEWRULE - RTM_BASE] = { .doit = fib_nl_newrule }, | |
829 | [RTM_DELRULE - RTM_BASE] = { .doit = fib_nl_delrule }, | |
830 | #endif | |
b60c5115 | 831 | [RTM_GETRULE - RTM_BASE] = { .dumpit = rtnl_dump_all }, |
c7fb64db TG |
832 | [RTM_GETNEIGHTBL - RTM_BASE] = { .dumpit = neightbl_dump_info }, |
833 | [RTM_SETNEIGHTBL - RTM_BASE] = { .doit = neightbl_set }, | |
1da177e4 LT |
834 | }; |
835 | ||
836 | static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr) | |
837 | { | |
838 | struct net_device *dev = ptr; | |
839 | switch (event) { | |
840 | case NETDEV_UNREGISTER: | |
841 | rtmsg_ifinfo(RTM_DELLINK, dev, ~0U); | |
842 | break; | |
843 | case NETDEV_REGISTER: | |
844 | rtmsg_ifinfo(RTM_NEWLINK, dev, ~0U); | |
845 | break; | |
846 | case NETDEV_UP: | |
847 | case NETDEV_DOWN: | |
848 | rtmsg_ifinfo(RTM_NEWLINK, dev, IFF_UP|IFF_RUNNING); | |
849 | break; | |
850 | case NETDEV_CHANGE: | |
851 | case NETDEV_GOING_DOWN: | |
852 | break; | |
853 | default: | |
854 | rtmsg_ifinfo(RTM_NEWLINK, dev, 0); | |
855 | break; | |
856 | } | |
857 | return NOTIFY_DONE; | |
858 | } | |
859 | ||
860 | static struct notifier_block rtnetlink_dev_notifier = { | |
861 | .notifier_call = rtnetlink_event, | |
862 | }; | |
863 | ||
864 | void __init rtnetlink_init(void) | |
865 | { | |
866 | int i; | |
867 | ||
868 | rtattr_max = 0; | |
869 | for (i = 0; i < ARRAY_SIZE(rta_max); i++) | |
870 | if (rta_max[i] > rtattr_max) | |
871 | rtattr_max = rta_max[i]; | |
872 | rta_buf = kmalloc(rtattr_max * sizeof(struct rtattr *), GFP_KERNEL); | |
873 | if (!rta_buf) | |
874 | panic("rtnetlink_init: cannot allocate rta_buf\n"); | |
875 | ||
06628607 PM |
876 | rtnl = netlink_kernel_create(NETLINK_ROUTE, RTNLGRP_MAX, rtnetlink_rcv, |
877 | THIS_MODULE); | |
1da177e4 LT |
878 | if (rtnl == NULL) |
879 | panic("rtnetlink_init: cannot initialize rtnetlink\n"); | |
880 | netlink_set_nonroot(NETLINK_ROUTE, NL_NONROOT_RECV); | |
881 | register_netdevice_notifier(&rtnetlink_dev_notifier); | |
882 | rtnetlink_links[PF_UNSPEC] = link_rtnetlink_table; | |
883 | rtnetlink_links[PF_PACKET] = link_rtnetlink_table; | |
884 | } | |
885 | ||
886 | EXPORT_SYMBOL(__rta_fill); | |
887 | EXPORT_SYMBOL(rtattr_strlcpy); | |
888 | EXPORT_SYMBOL(rtattr_parse); | |
889 | EXPORT_SYMBOL(rtnetlink_links); | |
890 | EXPORT_SYMBOL(rtnetlink_put_metrics); | |
1da177e4 | 891 | EXPORT_SYMBOL(rtnl_lock); |
6756ae4b | 892 | EXPORT_SYMBOL(rtnl_trylock); |
1da177e4 | 893 | EXPORT_SYMBOL(rtnl_unlock); |
2942e900 | 894 | EXPORT_SYMBOL(rtnl_unicast); |
97676b6b TG |
895 | EXPORT_SYMBOL(rtnl_notify); |
896 | EXPORT_SYMBOL(rtnl_set_sk_err); |