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1 | /* | |
2 | * Bridge netlink control interface | |
3 | * | |
4 | * Authors: | |
5 | * Stephen Hemminger <shemminger@osdl.org> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU General Public License | |
9 | * as published by the Free Software Foundation; either version | |
10 | * 2 of the License, or (at your option) any later version. | |
11 | */ | |
12 | ||
13 | #include <linux/kernel.h> | |
14 | #include <linux/slab.h> | |
15 | #include <linux/etherdevice.h> | |
16 | #include <net/rtnetlink.h> | |
17 | #include <net/net_namespace.h> | |
18 | #include <net/sock.h> | |
19 | #include <net/switchdev.h> | |
20 | #include <uapi/linux/if_bridge.h> | |
21 | ||
22 | #include "br_private.h" | |
23 | #include "br_private_stp.h" | |
24 | ||
25 | static int br_get_num_vlan_infos(const struct net_port_vlans *pv, | |
26 | u32 filter_mask) | |
27 | { | |
28 | u16 vid_range_start = 0, vid_range_end = 0; | |
29 | u16 vid_range_flags = 0; | |
30 | u16 pvid, vid, flags; | |
31 | int num_vlans = 0; | |
32 | ||
33 | if (filter_mask & RTEXT_FILTER_BRVLAN) | |
34 | return pv->num_vlans; | |
35 | ||
36 | if (!(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) | |
37 | return 0; | |
38 | ||
39 | /* Count number of vlan info's | |
40 | */ | |
41 | pvid = br_get_pvid(pv); | |
42 | for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) { | |
43 | flags = 0; | |
44 | if (vid == pvid) | |
45 | flags |= BRIDGE_VLAN_INFO_PVID; | |
46 | ||
47 | if (test_bit(vid, pv->untagged_bitmap)) | |
48 | flags |= BRIDGE_VLAN_INFO_UNTAGGED; | |
49 | ||
50 | if (vid_range_start == 0) { | |
51 | goto initvars; | |
52 | } else if ((vid - vid_range_end) == 1 && | |
53 | flags == vid_range_flags) { | |
54 | vid_range_end = vid; | |
55 | continue; | |
56 | } else { | |
57 | if ((vid_range_end - vid_range_start) > 0) | |
58 | num_vlans += 2; | |
59 | else | |
60 | num_vlans += 1; | |
61 | } | |
62 | initvars: | |
63 | vid_range_start = vid; | |
64 | vid_range_end = vid; | |
65 | vid_range_flags = flags; | |
66 | } | |
67 | ||
68 | if (vid_range_start != 0) { | |
69 | if ((vid_range_end - vid_range_start) > 0) | |
70 | num_vlans += 2; | |
71 | else | |
72 | num_vlans += 1; | |
73 | } | |
74 | ||
75 | return num_vlans; | |
76 | } | |
77 | ||
78 | static size_t br_get_link_af_size_filtered(const struct net_device *dev, | |
79 | u32 filter_mask) | |
80 | { | |
81 | struct net_port_vlans *pv; | |
82 | int num_vlan_infos; | |
83 | ||
84 | rcu_read_lock(); | |
85 | if (br_port_exists(dev)) | |
86 | pv = nbp_get_vlan_info(br_port_get_rcu(dev)); | |
87 | else if (dev->priv_flags & IFF_EBRIDGE) | |
88 | pv = br_get_vlan_info((struct net_bridge *)netdev_priv(dev)); | |
89 | else | |
90 | pv = NULL; | |
91 | if (pv) | |
92 | num_vlan_infos = br_get_num_vlan_infos(pv, filter_mask); | |
93 | else | |
94 | num_vlan_infos = 0; | |
95 | rcu_read_unlock(); | |
96 | ||
97 | if (!num_vlan_infos) | |
98 | return 0; | |
99 | ||
100 | /* Each VLAN is returned in bridge_vlan_info along with flags */ | |
101 | return num_vlan_infos * nla_total_size(sizeof(struct bridge_vlan_info)); | |
102 | } | |
103 | ||
104 | static inline size_t br_port_info_size(void) | |
105 | { | |
106 | return nla_total_size(1) /* IFLA_BRPORT_STATE */ | |
107 | + nla_total_size(2) /* IFLA_BRPORT_PRIORITY */ | |
108 | + nla_total_size(4) /* IFLA_BRPORT_COST */ | |
109 | + nla_total_size(1) /* IFLA_BRPORT_MODE */ | |
110 | + nla_total_size(1) /* IFLA_BRPORT_GUARD */ | |
111 | + nla_total_size(1) /* IFLA_BRPORT_PROTECT */ | |
112 | + nla_total_size(1) /* IFLA_BRPORT_FAST_LEAVE */ | |
113 | + nla_total_size(1) /* IFLA_BRPORT_LEARNING */ | |
114 | + nla_total_size(1) /* IFLA_BRPORT_UNICAST_FLOOD */ | |
115 | + 0; | |
116 | } | |
117 | ||
118 | static inline size_t br_nlmsg_size(struct net_device *dev, u32 filter_mask) | |
119 | { | |
120 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
121 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
122 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ | |
123 | + nla_total_size(4) /* IFLA_MASTER */ | |
124 | + nla_total_size(4) /* IFLA_MTU */ | |
125 | + nla_total_size(4) /* IFLA_LINK */ | |
126 | + nla_total_size(1) /* IFLA_OPERSTATE */ | |
127 | + nla_total_size(br_port_info_size()) /* IFLA_PROTINFO */ | |
128 | + nla_total_size(br_get_link_af_size_filtered(dev, | |
129 | filter_mask)); /* IFLA_AF_SPEC */ | |
130 | } | |
131 | ||
132 | static int br_port_fill_attrs(struct sk_buff *skb, | |
133 | const struct net_bridge_port *p) | |
134 | { | |
135 | u8 mode = !!(p->flags & BR_HAIRPIN_MODE); | |
136 | ||
137 | if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) || | |
138 | nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) || | |
139 | nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) || | |
140 | nla_put_u8(skb, IFLA_BRPORT_MODE, mode) || | |
141 | nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) || | |
142 | nla_put_u8(skb, IFLA_BRPORT_PROTECT, !!(p->flags & BR_ROOT_BLOCK)) || | |
143 | nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE, !!(p->flags & BR_MULTICAST_FAST_LEAVE)) || | |
144 | nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) || | |
145 | nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD, !!(p->flags & BR_FLOOD)) || | |
146 | nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)) || | |
147 | nla_put_u8(skb, IFLA_BRPORT_PROXYARP_WIFI, | |
148 | !!(p->flags & BR_PROXYARP_WIFI))) | |
149 | return -EMSGSIZE; | |
150 | ||
151 | return 0; | |
152 | } | |
153 | ||
154 | static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start, | |
155 | u16 vid_end, u16 flags) | |
156 | { | |
157 | struct bridge_vlan_info vinfo; | |
158 | ||
159 | if ((vid_end - vid_start) > 0) { | |
160 | /* add range to skb */ | |
161 | vinfo.vid = vid_start; | |
162 | vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_BEGIN; | |
163 | if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO, | |
164 | sizeof(vinfo), &vinfo)) | |
165 | goto nla_put_failure; | |
166 | ||
167 | vinfo.vid = vid_end; | |
168 | vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_END; | |
169 | if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO, | |
170 | sizeof(vinfo), &vinfo)) | |
171 | goto nla_put_failure; | |
172 | } else { | |
173 | vinfo.vid = vid_start; | |
174 | vinfo.flags = flags; | |
175 | if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO, | |
176 | sizeof(vinfo), &vinfo)) | |
177 | goto nla_put_failure; | |
178 | } | |
179 | ||
180 | return 0; | |
181 | ||
182 | nla_put_failure: | |
183 | return -EMSGSIZE; | |
184 | } | |
185 | ||
186 | static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb, | |
187 | const struct net_port_vlans *pv) | |
188 | { | |
189 | u16 vid_range_start = 0, vid_range_end = 0; | |
190 | u16 vid_range_flags = 0; | |
191 | u16 pvid, vid, flags; | |
192 | int err = 0; | |
193 | ||
194 | /* Pack IFLA_BRIDGE_VLAN_INFO's for every vlan | |
195 | * and mark vlan info with begin and end flags | |
196 | * if vlaninfo represents a range | |
197 | */ | |
198 | pvid = br_get_pvid(pv); | |
199 | for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) { | |
200 | flags = 0; | |
201 | if (vid == pvid) | |
202 | flags |= BRIDGE_VLAN_INFO_PVID; | |
203 | ||
204 | if (test_bit(vid, pv->untagged_bitmap)) | |
205 | flags |= BRIDGE_VLAN_INFO_UNTAGGED; | |
206 | ||
207 | if (vid_range_start == 0) { | |
208 | goto initvars; | |
209 | } else if ((vid - vid_range_end) == 1 && | |
210 | flags == vid_range_flags) { | |
211 | vid_range_end = vid; | |
212 | continue; | |
213 | } else { | |
214 | err = br_fill_ifvlaninfo_range(skb, vid_range_start, | |
215 | vid_range_end, | |
216 | vid_range_flags); | |
217 | if (err) | |
218 | return err; | |
219 | } | |
220 | ||
221 | initvars: | |
222 | vid_range_start = vid; | |
223 | vid_range_end = vid; | |
224 | vid_range_flags = flags; | |
225 | } | |
226 | ||
227 | if (vid_range_start != 0) { | |
228 | /* Call it once more to send any left over vlans */ | |
229 | err = br_fill_ifvlaninfo_range(skb, vid_range_start, | |
230 | vid_range_end, | |
231 | vid_range_flags); | |
232 | if (err) | |
233 | return err; | |
234 | } | |
235 | ||
236 | return 0; | |
237 | } | |
238 | ||
239 | static int br_fill_ifvlaninfo(struct sk_buff *skb, | |
240 | const struct net_port_vlans *pv) | |
241 | { | |
242 | struct bridge_vlan_info vinfo; | |
243 | u16 pvid, vid; | |
244 | ||
245 | pvid = br_get_pvid(pv); | |
246 | for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) { | |
247 | vinfo.vid = vid; | |
248 | vinfo.flags = 0; | |
249 | if (vid == pvid) | |
250 | vinfo.flags |= BRIDGE_VLAN_INFO_PVID; | |
251 | ||
252 | if (test_bit(vid, pv->untagged_bitmap)) | |
253 | vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED; | |
254 | ||
255 | if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO, | |
256 | sizeof(vinfo), &vinfo)) | |
257 | goto nla_put_failure; | |
258 | } | |
259 | ||
260 | return 0; | |
261 | ||
262 | nla_put_failure: | |
263 | return -EMSGSIZE; | |
264 | } | |
265 | ||
266 | /* | |
267 | * Create one netlink message for one interface | |
268 | * Contains port and master info as well as carrier and bridge state. | |
269 | */ | |
270 | static int br_fill_ifinfo(struct sk_buff *skb, | |
271 | const struct net_bridge_port *port, | |
272 | u32 pid, u32 seq, int event, unsigned int flags, | |
273 | u32 filter_mask, const struct net_device *dev) | |
274 | { | |
275 | const struct net_bridge *br; | |
276 | struct ifinfomsg *hdr; | |
277 | struct nlmsghdr *nlh; | |
278 | u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN; | |
279 | ||
280 | if (port) | |
281 | br = port->br; | |
282 | else | |
283 | br = netdev_priv(dev); | |
284 | ||
285 | br_debug(br, "br_fill_info event %d port %s master %s\n", | |
286 | event, dev->name, br->dev->name); | |
287 | ||
288 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags); | |
289 | if (nlh == NULL) | |
290 | return -EMSGSIZE; | |
291 | ||
292 | hdr = nlmsg_data(nlh); | |
293 | hdr->ifi_family = AF_BRIDGE; | |
294 | hdr->__ifi_pad = 0; | |
295 | hdr->ifi_type = dev->type; | |
296 | hdr->ifi_index = dev->ifindex; | |
297 | hdr->ifi_flags = dev_get_flags(dev); | |
298 | hdr->ifi_change = 0; | |
299 | ||
300 | if (nla_put_string(skb, IFLA_IFNAME, dev->name) || | |
301 | nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) || | |
302 | nla_put_u32(skb, IFLA_MTU, dev->mtu) || | |
303 | nla_put_u8(skb, IFLA_OPERSTATE, operstate) || | |
304 | (dev->addr_len && | |
305 | nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || | |
306 | (dev->ifindex != dev_get_iflink(dev) && | |
307 | nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev)))) | |
308 | goto nla_put_failure; | |
309 | ||
310 | if (event == RTM_NEWLINK && port) { | |
311 | struct nlattr *nest | |
312 | = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED); | |
313 | ||
314 | if (nest == NULL || br_port_fill_attrs(skb, port) < 0) | |
315 | goto nla_put_failure; | |
316 | nla_nest_end(skb, nest); | |
317 | } | |
318 | ||
319 | /* Check if the VID information is requested */ | |
320 | if ((filter_mask & RTEXT_FILTER_BRVLAN) || | |
321 | (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) { | |
322 | const struct net_port_vlans *pv; | |
323 | struct nlattr *af; | |
324 | int err; | |
325 | ||
326 | if (port) | |
327 | pv = nbp_get_vlan_info(port); | |
328 | else | |
329 | pv = br_get_vlan_info(br); | |
330 | ||
331 | if (!pv || bitmap_empty(pv->vlan_bitmap, VLAN_N_VID)) | |
332 | goto done; | |
333 | ||
334 | af = nla_nest_start(skb, IFLA_AF_SPEC); | |
335 | if (!af) | |
336 | goto nla_put_failure; | |
337 | ||
338 | if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED) | |
339 | err = br_fill_ifvlaninfo_compressed(skb, pv); | |
340 | else | |
341 | err = br_fill_ifvlaninfo(skb, pv); | |
342 | if (err) | |
343 | goto nla_put_failure; | |
344 | nla_nest_end(skb, af); | |
345 | } | |
346 | ||
347 | done: | |
348 | nlmsg_end(skb, nlh); | |
349 | return 0; | |
350 | ||
351 | nla_put_failure: | |
352 | nlmsg_cancel(skb, nlh); | |
353 | return -EMSGSIZE; | |
354 | } | |
355 | ||
356 | /* | |
357 | * Notify listeners of a change in port information | |
358 | */ | |
359 | void br_ifinfo_notify(int event, struct net_bridge_port *port) | |
360 | { | |
361 | struct net *net; | |
362 | struct sk_buff *skb; | |
363 | int err = -ENOBUFS; | |
364 | u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED; | |
365 | ||
366 | if (!port) | |
367 | return; | |
368 | ||
369 | net = dev_net(port->dev); | |
370 | br_debug(port->br, "port %u(%s) event %d\n", | |
371 | (unsigned int)port->port_no, port->dev->name, event); | |
372 | ||
373 | skb = nlmsg_new(br_nlmsg_size(port->dev, filter), GFP_ATOMIC); | |
374 | if (skb == NULL) | |
375 | goto errout; | |
376 | ||
377 | err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, port->dev); | |
378 | if (err < 0) { | |
379 | /* -EMSGSIZE implies BUG in br_nlmsg_size() */ | |
380 | WARN_ON(err == -EMSGSIZE); | |
381 | kfree_skb(skb); | |
382 | goto errout; | |
383 | } | |
384 | rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC); | |
385 | return; | |
386 | errout: | |
387 | rtnl_set_sk_err(net, RTNLGRP_LINK, err); | |
388 | } | |
389 | ||
390 | ||
391 | /* | |
392 | * Dump information about all ports, in response to GETLINK | |
393 | */ | |
394 | int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, | |
395 | struct net_device *dev, u32 filter_mask, int nlflags) | |
396 | { | |
397 | struct net_bridge_port *port = br_port_get_rtnl(dev); | |
398 | ||
399 | if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) && | |
400 | !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) | |
401 | return 0; | |
402 | ||
403 | return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags, | |
404 | filter_mask, dev); | |
405 | } | |
406 | ||
407 | static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p, | |
408 | int cmd, struct bridge_vlan_info *vinfo) | |
409 | { | |
410 | int err = 0; | |
411 | ||
412 | switch (cmd) { | |
413 | case RTM_SETLINK: | |
414 | if (p) { | |
415 | err = nbp_vlan_add(p, vinfo->vid, vinfo->flags); | |
416 | if (err) | |
417 | break; | |
418 | ||
419 | if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER) | |
420 | err = br_vlan_add(p->br, vinfo->vid, | |
421 | vinfo->flags); | |
422 | } else { | |
423 | err = br_vlan_add(br, vinfo->vid, vinfo->flags); | |
424 | } | |
425 | break; | |
426 | ||
427 | case RTM_DELLINK: | |
428 | if (p) { | |
429 | nbp_vlan_delete(p, vinfo->vid); | |
430 | if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER) | |
431 | br_vlan_delete(p->br, vinfo->vid); | |
432 | } else { | |
433 | br_vlan_delete(br, vinfo->vid); | |
434 | } | |
435 | break; | |
436 | } | |
437 | ||
438 | return err; | |
439 | } | |
440 | ||
441 | static int br_afspec(struct net_bridge *br, | |
442 | struct net_bridge_port *p, | |
443 | struct nlattr *af_spec, | |
444 | int cmd) | |
445 | { | |
446 | struct bridge_vlan_info *vinfo_start = NULL; | |
447 | struct bridge_vlan_info *vinfo = NULL; | |
448 | struct nlattr *attr; | |
449 | int err = 0; | |
450 | int rem; | |
451 | ||
452 | nla_for_each_nested(attr, af_spec, rem) { | |
453 | if (nla_type(attr) != IFLA_BRIDGE_VLAN_INFO) | |
454 | continue; | |
455 | if (nla_len(attr) != sizeof(struct bridge_vlan_info)) | |
456 | return -EINVAL; | |
457 | vinfo = nla_data(attr); | |
458 | if (!vinfo->vid || vinfo->vid >= VLAN_VID_MASK) | |
459 | return -EINVAL; | |
460 | if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { | |
461 | if (vinfo_start) | |
462 | return -EINVAL; | |
463 | vinfo_start = vinfo; | |
464 | continue; | |
465 | } | |
466 | ||
467 | if (vinfo_start) { | |
468 | struct bridge_vlan_info tmp_vinfo; | |
469 | int v; | |
470 | ||
471 | if (!(vinfo->flags & BRIDGE_VLAN_INFO_RANGE_END)) | |
472 | return -EINVAL; | |
473 | ||
474 | if (vinfo->vid <= vinfo_start->vid) | |
475 | return -EINVAL; | |
476 | ||
477 | memcpy(&tmp_vinfo, vinfo_start, | |
478 | sizeof(struct bridge_vlan_info)); | |
479 | ||
480 | for (v = vinfo_start->vid; v <= vinfo->vid; v++) { | |
481 | tmp_vinfo.vid = v; | |
482 | err = br_vlan_info(br, p, cmd, &tmp_vinfo); | |
483 | if (err) | |
484 | break; | |
485 | } | |
486 | vinfo_start = NULL; | |
487 | } else { | |
488 | err = br_vlan_info(br, p, cmd, vinfo); | |
489 | } | |
490 | if (err) | |
491 | break; | |
492 | } | |
493 | ||
494 | return err; | |
495 | } | |
496 | ||
497 | static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = { | |
498 | [IFLA_BRPORT_STATE] = { .type = NLA_U8 }, | |
499 | [IFLA_BRPORT_COST] = { .type = NLA_U32 }, | |
500 | [IFLA_BRPORT_PRIORITY] = { .type = NLA_U16 }, | |
501 | [IFLA_BRPORT_MODE] = { .type = NLA_U8 }, | |
502 | [IFLA_BRPORT_GUARD] = { .type = NLA_U8 }, | |
503 | [IFLA_BRPORT_PROTECT] = { .type = NLA_U8 }, | |
504 | [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 }, | |
505 | [IFLA_BRPORT_LEARNING] = { .type = NLA_U8 }, | |
506 | [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 }, | |
507 | }; | |
508 | ||
509 | /* Change the state of the port and notify spanning tree */ | |
510 | static int br_set_port_state(struct net_bridge_port *p, u8 state) | |
511 | { | |
512 | if (state > BR_STATE_BLOCKING) | |
513 | return -EINVAL; | |
514 | ||
515 | /* if kernel STP is running, don't allow changes */ | |
516 | if (p->br->stp_enabled == BR_KERNEL_STP) | |
517 | return -EBUSY; | |
518 | ||
519 | /* if device is not up, change is not allowed | |
520 | * if link is not present, only allowable state is disabled | |
521 | */ | |
522 | if (!netif_running(p->dev) || | |
523 | (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED)) | |
524 | return -ENETDOWN; | |
525 | ||
526 | br_set_state(p, state); | |
527 | br_log_state(p); | |
528 | br_port_state_selection(p->br); | |
529 | return 0; | |
530 | } | |
531 | ||
532 | /* Set/clear or port flags based on attribute */ | |
533 | static void br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[], | |
534 | int attrtype, unsigned long mask) | |
535 | { | |
536 | if (tb[attrtype]) { | |
537 | u8 flag = nla_get_u8(tb[attrtype]); | |
538 | if (flag) | |
539 | p->flags |= mask; | |
540 | else | |
541 | p->flags &= ~mask; | |
542 | } | |
543 | } | |
544 | ||
545 | /* Process bridge protocol info on port */ | |
546 | static int br_setport(struct net_bridge_port *p, struct nlattr *tb[]) | |
547 | { | |
548 | int err; | |
549 | unsigned long old_flags = p->flags; | |
550 | ||
551 | br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE); | |
552 | br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD); | |
553 | br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE); | |
554 | br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK); | |
555 | br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING); | |
556 | br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD); | |
557 | br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP); | |
558 | br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI); | |
559 | ||
560 | if (tb[IFLA_BRPORT_COST]) { | |
561 | err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST])); | |
562 | if (err) | |
563 | return err; | |
564 | } | |
565 | ||
566 | if (tb[IFLA_BRPORT_PRIORITY]) { | |
567 | err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY])); | |
568 | if (err) | |
569 | return err; | |
570 | } | |
571 | ||
572 | if (tb[IFLA_BRPORT_STATE]) { | |
573 | err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE])); | |
574 | if (err) | |
575 | return err; | |
576 | } | |
577 | ||
578 | br_port_flags_change(p, old_flags ^ p->flags); | |
579 | return 0; | |
580 | } | |
581 | ||
582 | /* Change state and parameters on port. */ | |
583 | int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags) | |
584 | { | |
585 | struct nlattr *protinfo; | |
586 | struct nlattr *afspec; | |
587 | struct net_bridge_port *p; | |
588 | struct nlattr *tb[IFLA_BRPORT_MAX + 1]; | |
589 | int err = 0; | |
590 | ||
591 | protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO); | |
592 | afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); | |
593 | if (!protinfo && !afspec) | |
594 | return 0; | |
595 | ||
596 | p = br_port_get_rtnl(dev); | |
597 | /* We want to accept dev as bridge itself if the AF_SPEC | |
598 | * is set to see if someone is setting vlan info on the bridge | |
599 | */ | |
600 | if (!p && !afspec) | |
601 | return -EINVAL; | |
602 | ||
603 | if (p && protinfo) { | |
604 | if (protinfo->nla_type & NLA_F_NESTED) { | |
605 | err = nla_parse_nested(tb, IFLA_BRPORT_MAX, | |
606 | protinfo, br_port_policy); | |
607 | if (err) | |
608 | return err; | |
609 | ||
610 | spin_lock_bh(&p->br->lock); | |
611 | err = br_setport(p, tb); | |
612 | spin_unlock_bh(&p->br->lock); | |
613 | } else { | |
614 | /* Binary compatibility with old RSTP */ | |
615 | if (nla_len(protinfo) < sizeof(u8)) | |
616 | return -EINVAL; | |
617 | ||
618 | spin_lock_bh(&p->br->lock); | |
619 | err = br_set_port_state(p, nla_get_u8(protinfo)); | |
620 | spin_unlock_bh(&p->br->lock); | |
621 | } | |
622 | if (err) | |
623 | goto out; | |
624 | } | |
625 | ||
626 | if (afspec) { | |
627 | err = br_afspec((struct net_bridge *)netdev_priv(dev), p, | |
628 | afspec, RTM_SETLINK); | |
629 | } | |
630 | ||
631 | if (err == 0) | |
632 | br_ifinfo_notify(RTM_NEWLINK, p); | |
633 | out: | |
634 | return err; | |
635 | } | |
636 | ||
637 | /* Delete port information */ | |
638 | int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags) | |
639 | { | |
640 | struct nlattr *afspec; | |
641 | struct net_bridge_port *p; | |
642 | int err = 0; | |
643 | ||
644 | afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); | |
645 | if (!afspec) | |
646 | return 0; | |
647 | ||
648 | p = br_port_get_rtnl(dev); | |
649 | /* We want to accept dev as bridge itself as well */ | |
650 | if (!p && !(dev->priv_flags & IFF_EBRIDGE)) | |
651 | return -EINVAL; | |
652 | ||
653 | err = br_afspec((struct net_bridge *)netdev_priv(dev), p, | |
654 | afspec, RTM_DELLINK); | |
655 | if (err == 0) | |
656 | /* Send RTM_NEWLINK because userspace | |
657 | * expects RTM_NEWLINK for vlan dels | |
658 | */ | |
659 | br_ifinfo_notify(RTM_NEWLINK, p); | |
660 | ||
661 | return err; | |
662 | } | |
663 | static int br_validate(struct nlattr *tb[], struct nlattr *data[]) | |
664 | { | |
665 | if (tb[IFLA_ADDRESS]) { | |
666 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
667 | return -EINVAL; | |
668 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
669 | return -EADDRNOTAVAIL; | |
670 | } | |
671 | ||
672 | return 0; | |
673 | } | |
674 | ||
675 | static int br_dev_newlink(struct net *src_net, struct net_device *dev, | |
676 | struct nlattr *tb[], struct nlattr *data[]) | |
677 | { | |
678 | struct net_bridge *br = netdev_priv(dev); | |
679 | ||
680 | if (tb[IFLA_ADDRESS]) { | |
681 | spin_lock_bh(&br->lock); | |
682 | br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS])); | |
683 | spin_unlock_bh(&br->lock); | |
684 | } | |
685 | ||
686 | return register_netdevice(dev); | |
687 | } | |
688 | ||
689 | static int br_port_slave_changelink(struct net_device *brdev, | |
690 | struct net_device *dev, | |
691 | struct nlattr *tb[], | |
692 | struct nlattr *data[]) | |
693 | { | |
694 | struct net_bridge *br = netdev_priv(brdev); | |
695 | int ret; | |
696 | ||
697 | if (!data) | |
698 | return 0; | |
699 | ||
700 | spin_lock_bh(&br->lock); | |
701 | ret = br_setport(br_port_get_rtnl(dev), data); | |
702 | spin_unlock_bh(&br->lock); | |
703 | ||
704 | return ret; | |
705 | } | |
706 | ||
707 | static int br_port_fill_slave_info(struct sk_buff *skb, | |
708 | const struct net_device *brdev, | |
709 | const struct net_device *dev) | |
710 | { | |
711 | return br_port_fill_attrs(skb, br_port_get_rtnl(dev)); | |
712 | } | |
713 | ||
714 | static size_t br_port_get_slave_size(const struct net_device *brdev, | |
715 | const struct net_device *dev) | |
716 | { | |
717 | return br_port_info_size(); | |
718 | } | |
719 | ||
720 | static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = { | |
721 | [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 }, | |
722 | [IFLA_BR_HELLO_TIME] = { .type = NLA_U32 }, | |
723 | [IFLA_BR_MAX_AGE] = { .type = NLA_U32 }, | |
724 | [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 }, | |
725 | [IFLA_BR_STP_STATE] = { .type = NLA_U32 }, | |
726 | [IFLA_BR_PRIORITY] = { .type = NLA_U16 }, | |
727 | }; | |
728 | ||
729 | static int br_changelink(struct net_device *brdev, struct nlattr *tb[], | |
730 | struct nlattr *data[]) | |
731 | { | |
732 | struct net_bridge *br = netdev_priv(brdev); | |
733 | int err; | |
734 | ||
735 | if (!data) | |
736 | return 0; | |
737 | ||
738 | if (data[IFLA_BR_FORWARD_DELAY]) { | |
739 | err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY])); | |
740 | if (err) | |
741 | return err; | |
742 | } | |
743 | ||
744 | if (data[IFLA_BR_HELLO_TIME]) { | |
745 | err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME])); | |
746 | if (err) | |
747 | return err; | |
748 | } | |
749 | ||
750 | if (data[IFLA_BR_MAX_AGE]) { | |
751 | err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE])); | |
752 | if (err) | |
753 | return err; | |
754 | } | |
755 | ||
756 | if (data[IFLA_BR_AGEING_TIME]) { | |
757 | u32 ageing_time = nla_get_u32(data[IFLA_BR_AGEING_TIME]); | |
758 | ||
759 | br->ageing_time = clock_t_to_jiffies(ageing_time); | |
760 | } | |
761 | ||
762 | if (data[IFLA_BR_STP_STATE]) { | |
763 | u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]); | |
764 | ||
765 | br_stp_set_enabled(br, stp_enabled); | |
766 | } | |
767 | ||
768 | if (data[IFLA_BR_PRIORITY]) { | |
769 | u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]); | |
770 | ||
771 | br_stp_set_bridge_priority(br, priority); | |
772 | } | |
773 | ||
774 | return 0; | |
775 | } | |
776 | ||
777 | static size_t br_get_size(const struct net_device *brdev) | |
778 | { | |
779 | return nla_total_size(sizeof(u32)) + /* IFLA_BR_FORWARD_DELAY */ | |
780 | nla_total_size(sizeof(u32)) + /* IFLA_BR_HELLO_TIME */ | |
781 | nla_total_size(sizeof(u32)) + /* IFLA_BR_MAX_AGE */ | |
782 | nla_total_size(sizeof(u32)) + /* IFLA_BR_AGEING_TIME */ | |
783 | nla_total_size(sizeof(u32)) + /* IFLA_BR_STP_STATE */ | |
784 | nla_total_size(sizeof(u16)) + /* IFLA_BR_PRIORITY */ | |
785 | 0; | |
786 | } | |
787 | ||
788 | static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev) | |
789 | { | |
790 | struct net_bridge *br = netdev_priv(brdev); | |
791 | u32 forward_delay = jiffies_to_clock_t(br->forward_delay); | |
792 | u32 hello_time = jiffies_to_clock_t(br->hello_time); | |
793 | u32 age_time = jiffies_to_clock_t(br->max_age); | |
794 | u32 ageing_time = jiffies_to_clock_t(br->ageing_time); | |
795 | u32 stp_enabled = br->stp_enabled; | |
796 | u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1]; | |
797 | ||
798 | if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) || | |
799 | nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) || | |
800 | nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) || | |
801 | nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) || | |
802 | nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) || | |
803 | nla_put_u16(skb, IFLA_BR_PRIORITY, priority)) | |
804 | return -EMSGSIZE; | |
805 | ||
806 | return 0; | |
807 | } | |
808 | ||
809 | static size_t br_get_link_af_size(const struct net_device *dev) | |
810 | { | |
811 | struct net_port_vlans *pv; | |
812 | ||
813 | if (br_port_exists(dev)) | |
814 | pv = nbp_get_vlan_info(br_port_get_rtnl(dev)); | |
815 | else if (dev->priv_flags & IFF_EBRIDGE) | |
816 | pv = br_get_vlan_info((struct net_bridge *)netdev_priv(dev)); | |
817 | else | |
818 | return 0; | |
819 | ||
820 | if (!pv) | |
821 | return 0; | |
822 | ||
823 | /* Each VLAN is returned in bridge_vlan_info along with flags */ | |
824 | return pv->num_vlans * nla_total_size(sizeof(struct bridge_vlan_info)); | |
825 | } | |
826 | ||
827 | static struct rtnl_af_ops br_af_ops __read_mostly = { | |
828 | .family = AF_BRIDGE, | |
829 | .get_link_af_size = br_get_link_af_size, | |
830 | }; | |
831 | ||
832 | struct rtnl_link_ops br_link_ops __read_mostly = { | |
833 | .kind = "bridge", | |
834 | .priv_size = sizeof(struct net_bridge), | |
835 | .setup = br_dev_setup, | |
836 | .maxtype = IFLA_BRPORT_MAX, | |
837 | .policy = br_policy, | |
838 | .validate = br_validate, | |
839 | .newlink = br_dev_newlink, | |
840 | .changelink = br_changelink, | |
841 | .dellink = br_dev_delete, | |
842 | .get_size = br_get_size, | |
843 | .fill_info = br_fill_info, | |
844 | ||
845 | .slave_maxtype = IFLA_BRPORT_MAX, | |
846 | .slave_policy = br_port_policy, | |
847 | .slave_changelink = br_port_slave_changelink, | |
848 | .get_slave_size = br_port_get_slave_size, | |
849 | .fill_slave_info = br_port_fill_slave_info, | |
850 | }; | |
851 | ||
852 | int __init br_netlink_init(void) | |
853 | { | |
854 | int err; | |
855 | ||
856 | br_mdb_init(); | |
857 | rtnl_af_register(&br_af_ops); | |
858 | ||
859 | err = rtnl_link_register(&br_link_ops); | |
860 | if (err) | |
861 | goto out_af; | |
862 | ||
863 | return 0; | |
864 | ||
865 | out_af: | |
866 | rtnl_af_unregister(&br_af_ops); | |
867 | br_mdb_uninit(); | |
868 | return err; | |
869 | } | |
870 | ||
871 | void br_netlink_fini(void) | |
872 | { | |
873 | br_mdb_uninit(); | |
874 | rtnl_af_unregister(&br_af_ops); | |
875 | rtnl_link_unregister(&br_link_ops); | |
876 | } |