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70ebe4a4 | 1 | /* Copyright 2011-2014 Autronica Fire and Security AS |
f421436a AB |
2 | * |
3 | * This program is free software; you can redistribute it and/or modify it | |
4 | * under the terms of the GNU General Public License as published by the Free | |
5 | * Software Foundation; either version 2 of the License, or (at your option) | |
6 | * any later version. | |
7 | * | |
8 | * Author(s): | |
70ebe4a4 | 9 | * 2011-2014 Arvid Brodin, arvid.brodin@alten.se |
f421436a AB |
10 | * |
11 | * Routines for handling Netlink messages for HSR. | |
12 | */ | |
13 | ||
14 | #include "hsr_netlink.h" | |
15 | #include <linux/kernel.h> | |
16 | #include <net/rtnetlink.h> | |
17 | #include <net/genetlink.h> | |
18 | #include "hsr_main.h" | |
19 | #include "hsr_device.h" | |
20 | #include "hsr_framereg.h" | |
21 | ||
22 | static const struct nla_policy hsr_policy[IFLA_HSR_MAX + 1] = { | |
23 | [IFLA_HSR_SLAVE1] = { .type = NLA_U32 }, | |
24 | [IFLA_HSR_SLAVE2] = { .type = NLA_U32 }, | |
25 | [IFLA_HSR_MULTICAST_SPEC] = { .type = NLA_U8 }, | |
ee1c2797 | 26 | [IFLA_HSR_VERSION] = { .type = NLA_U8 }, |
98bf8362 AB |
27 | [IFLA_HSR_SUPERVISION_ADDR] = { .type = NLA_BINARY, .len = ETH_ALEN }, |
28 | [IFLA_HSR_SEQ_NR] = { .type = NLA_U16 }, | |
f421436a AB |
29 | }; |
30 | ||
31 | ||
32 | /* Here, it seems a netdevice has already been allocated for us, and the | |
33 | * hsr_dev_setup routine has been executed. Nice! | |
34 | */ | |
35 | static int hsr_newlink(struct net *src_net, struct net_device *dev, | |
36 | struct nlattr *tb[], struct nlattr *data[]) | |
37 | { | |
38 | struct net_device *link[2]; | |
ee1c2797 | 39 | unsigned char multicast_spec, hsr_version; |
f421436a | 40 | |
a718dcc5 AB |
41 | if (!data) { |
42 | netdev_info(dev, "HSR: No slave devices specified\n"); | |
43 | return -EINVAL; | |
44 | } | |
f421436a | 45 | if (!data[IFLA_HSR_SLAVE1]) { |
a718dcc5 | 46 | netdev_info(dev, "HSR: Slave1 device not specified\n"); |
f421436a AB |
47 | return -EINVAL; |
48 | } | |
49 | link[0] = __dev_get_by_index(src_net, nla_get_u32(data[IFLA_HSR_SLAVE1])); | |
50 | if (!data[IFLA_HSR_SLAVE2]) { | |
a718dcc5 | 51 | netdev_info(dev, "HSR: Slave2 device not specified\n"); |
f421436a AB |
52 | return -EINVAL; |
53 | } | |
54 | link[1] = __dev_get_by_index(src_net, nla_get_u32(data[IFLA_HSR_SLAVE2])); | |
55 | ||
56 | if (!link[0] || !link[1]) | |
57 | return -ENODEV; | |
58 | if (link[0] == link[1]) | |
59 | return -EINVAL; | |
60 | ||
61 | if (!data[IFLA_HSR_MULTICAST_SPEC]) | |
62 | multicast_spec = 0; | |
63 | else | |
64 | multicast_spec = nla_get_u8(data[IFLA_HSR_MULTICAST_SPEC]); | |
65 | ||
ee1c2797 PH |
66 | if (!data[IFLA_HSR_VERSION]) |
67 | hsr_version = 0; | |
68 | else | |
69 | hsr_version = nla_get_u8(data[IFLA_HSR_VERSION]); | |
70 | ||
71 | return hsr_dev_finalize(dev, link, multicast_spec, hsr_version); | |
f421436a AB |
72 | } |
73 | ||
98bf8362 AB |
74 | static int hsr_fill_info(struct sk_buff *skb, const struct net_device *dev) |
75 | { | |
70ebe4a4 | 76 | struct hsr_priv *hsr; |
c5a75911 | 77 | struct hsr_port *port; |
51f3c605 | 78 | int res; |
98bf8362 | 79 | |
70ebe4a4 | 80 | hsr = netdev_priv(dev); |
98bf8362 | 81 | |
51f3c605 | 82 | res = 0; |
98bf8362 | 83 | |
51f3c605 | 84 | rcu_read_lock(); |
c5a75911 AB |
85 | port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_A); |
86 | if (port) | |
87 | res = nla_put_u32(skb, IFLA_HSR_SLAVE1, port->dev->ifindex); | |
51f3c605 AB |
88 | rcu_read_unlock(); |
89 | if (res) | |
90 | goto nla_put_failure; | |
91 | ||
92 | rcu_read_lock(); | |
c5a75911 AB |
93 | port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_B); |
94 | if (port) | |
95 | res = nla_put_u32(skb, IFLA_HSR_SLAVE2, port->dev->ifindex); | |
51f3c605 AB |
96 | rcu_read_unlock(); |
97 | if (res) | |
98 | goto nla_put_failure; | |
98bf8362 AB |
99 | |
100 | if (nla_put(skb, IFLA_HSR_SUPERVISION_ADDR, ETH_ALEN, | |
70ebe4a4 AB |
101 | hsr->sup_multicast_addr) || |
102 | nla_put_u16(skb, IFLA_HSR_SEQ_NR, hsr->sequence_nr)) | |
98bf8362 AB |
103 | goto nla_put_failure; |
104 | ||
105 | return 0; | |
106 | ||
107 | nla_put_failure: | |
108 | return -EMSGSIZE; | |
109 | } | |
110 | ||
f421436a AB |
111 | static struct rtnl_link_ops hsr_link_ops __read_mostly = { |
112 | .kind = "hsr", | |
113 | .maxtype = IFLA_HSR_MAX, | |
114 | .policy = hsr_policy, | |
115 | .priv_size = sizeof(struct hsr_priv), | |
116 | .setup = hsr_dev_setup, | |
117 | .newlink = hsr_newlink, | |
98bf8362 | 118 | .fill_info = hsr_fill_info, |
f421436a AB |
119 | }; |
120 | ||
121 | ||
122 | ||
123 | /* attribute policy */ | |
124 | /* NLA_BINARY missing in libnl; use NLA_UNSPEC in userspace instead. */ | |
125 | static const struct nla_policy hsr_genl_policy[HSR_A_MAX + 1] = { | |
126 | [HSR_A_NODE_ADDR] = { .type = NLA_BINARY, .len = ETH_ALEN }, | |
127 | [HSR_A_NODE_ADDR_B] = { .type = NLA_BINARY, .len = ETH_ALEN }, | |
128 | [HSR_A_IFINDEX] = { .type = NLA_U32 }, | |
129 | [HSR_A_IF1_AGE] = { .type = NLA_U32 }, | |
130 | [HSR_A_IF2_AGE] = { .type = NLA_U32 }, | |
131 | [HSR_A_IF1_SEQ] = { .type = NLA_U16 }, | |
132 | [HSR_A_IF2_SEQ] = { .type = NLA_U16 }, | |
133 | }; | |
134 | ||
135 | static struct genl_family hsr_genl_family = { | |
136 | .id = GENL_ID_GENERATE, | |
137 | .hdrsize = 0, | |
138 | .name = "HSR", | |
139 | .version = 1, | |
140 | .maxattr = HSR_A_MAX, | |
141 | }; | |
142 | ||
2a94fe48 JB |
143 | static const struct genl_multicast_group hsr_mcgrps[] = { |
144 | { .name = "hsr-network", }, | |
f421436a AB |
145 | }; |
146 | ||
147 | ||
148 | ||
149 | /* This is called if for some node with MAC address addr, we only get frames | |
150 | * over one of the slave interfaces. This would indicate an open network ring | |
151 | * (i.e. a link has failed somewhere). | |
152 | */ | |
70ebe4a4 | 153 | void hsr_nl_ringerror(struct hsr_priv *hsr, unsigned char addr[ETH_ALEN], |
c5a75911 | 154 | struct hsr_port *port) |
f421436a AB |
155 | { |
156 | struct sk_buff *skb; | |
157 | void *msg_head; | |
c5a75911 | 158 | struct hsr_port *master; |
f421436a | 159 | int res; |
f421436a AB |
160 | |
161 | skb = genlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC); | |
162 | if (!skb) | |
163 | goto fail; | |
164 | ||
165 | msg_head = genlmsg_put(skb, 0, 0, &hsr_genl_family, 0, HSR_C_RING_ERROR); | |
166 | if (!msg_head) | |
167 | goto nla_put_failure; | |
168 | ||
169 | res = nla_put(skb, HSR_A_NODE_ADDR, ETH_ALEN, addr); | |
170 | if (res < 0) | |
171 | goto nla_put_failure; | |
172 | ||
c5a75911 | 173 | res = nla_put_u32(skb, HSR_A_IFINDEX, port->dev->ifindex); |
f421436a AB |
174 | if (res < 0) |
175 | goto nla_put_failure; | |
176 | ||
177 | genlmsg_end(skb, msg_head); | |
2a94fe48 | 178 | genlmsg_multicast(&hsr_genl_family, skb, 0, 0, GFP_ATOMIC); |
f421436a AB |
179 | |
180 | return; | |
181 | ||
182 | nla_put_failure: | |
183 | kfree_skb(skb); | |
184 | ||
185 | fail: | |
c5a75911 AB |
186 | rcu_read_lock(); |
187 | master = hsr_port_get_hsr(hsr, HSR_PT_MASTER); | |
188 | netdev_warn(master->dev, "Could not send HSR ring error message\n"); | |
189 | rcu_read_unlock(); | |
f421436a AB |
190 | } |
191 | ||
192 | /* This is called when we haven't heard from the node with MAC address addr for | |
193 | * some time (just before the node is removed from the node table/list). | |
194 | */ | |
70ebe4a4 | 195 | void hsr_nl_nodedown(struct hsr_priv *hsr, unsigned char addr[ETH_ALEN]) |
f421436a AB |
196 | { |
197 | struct sk_buff *skb; | |
198 | void *msg_head; | |
c5a75911 | 199 | struct hsr_port *master; |
f421436a AB |
200 | int res; |
201 | ||
202 | skb = genlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC); | |
203 | if (!skb) | |
204 | goto fail; | |
205 | ||
206 | msg_head = genlmsg_put(skb, 0, 0, &hsr_genl_family, 0, HSR_C_NODE_DOWN); | |
207 | if (!msg_head) | |
208 | goto nla_put_failure; | |
209 | ||
210 | ||
211 | res = nla_put(skb, HSR_A_NODE_ADDR, ETH_ALEN, addr); | |
212 | if (res < 0) | |
213 | goto nla_put_failure; | |
214 | ||
215 | genlmsg_end(skb, msg_head); | |
2a94fe48 | 216 | genlmsg_multicast(&hsr_genl_family, skb, 0, 0, GFP_ATOMIC); |
f421436a AB |
217 | |
218 | return; | |
219 | ||
220 | nla_put_failure: | |
221 | kfree_skb(skb); | |
222 | ||
223 | fail: | |
c5a75911 AB |
224 | rcu_read_lock(); |
225 | master = hsr_port_get_hsr(hsr, HSR_PT_MASTER); | |
226 | netdev_warn(master->dev, "Could not send HSR node down\n"); | |
227 | rcu_read_unlock(); | |
f421436a AB |
228 | } |
229 | ||
230 | ||
231 | /* HSR_C_GET_NODE_STATUS lets userspace query the internal HSR node table | |
232 | * about the status of a specific node in the network, defined by its MAC | |
233 | * address. | |
234 | * | |
235 | * Input: hsr ifindex, node mac address | |
236 | * Output: hsr ifindex, node mac address (copied from request), | |
237 | * age of latest frame from node over slave 1, slave 2 [ms] | |
238 | */ | |
239 | static int hsr_get_node_status(struct sk_buff *skb_in, struct genl_info *info) | |
240 | { | |
241 | /* For receiving */ | |
242 | struct nlattr *na; | |
c5a75911 | 243 | struct net_device *hsr_dev; |
f421436a AB |
244 | |
245 | /* For sending */ | |
246 | struct sk_buff *skb_out; | |
247 | void *msg_head; | |
70ebe4a4 | 248 | struct hsr_priv *hsr; |
c5a75911 | 249 | struct hsr_port *port; |
f421436a AB |
250 | unsigned char hsr_node_addr_b[ETH_ALEN]; |
251 | int hsr_node_if1_age; | |
252 | u16 hsr_node_if1_seq; | |
253 | int hsr_node_if2_age; | |
254 | u16 hsr_node_if2_seq; | |
255 | int addr_b_ifindex; | |
256 | int res; | |
257 | ||
258 | if (!info) | |
259 | goto invalid; | |
260 | ||
261 | na = info->attrs[HSR_A_IFINDEX]; | |
262 | if (!na) | |
263 | goto invalid; | |
264 | na = info->attrs[HSR_A_NODE_ADDR]; | |
265 | if (!na) | |
266 | goto invalid; | |
267 | ||
268 | hsr_dev = __dev_get_by_index(genl_info_net(info), | |
269 | nla_get_u32(info->attrs[HSR_A_IFINDEX])); | |
270 | if (!hsr_dev) | |
271 | goto invalid; | |
272 | if (!is_hsr_master(hsr_dev)) | |
273 | goto invalid; | |
274 | ||
275 | ||
276 | /* Send reply */ | |
277 | ||
278 | skb_out = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
279 | if (!skb_out) { | |
280 | res = -ENOMEM; | |
281 | goto fail; | |
282 | } | |
283 | ||
284 | msg_head = genlmsg_put(skb_out, NETLINK_CB(skb_in).portid, | |
285 | info->snd_seq, &hsr_genl_family, 0, | |
286 | HSR_C_SET_NODE_STATUS); | |
287 | if (!msg_head) { | |
288 | res = -ENOMEM; | |
289 | goto nla_put_failure; | |
290 | } | |
291 | ||
292 | res = nla_put_u32(skb_out, HSR_A_IFINDEX, hsr_dev->ifindex); | |
293 | if (res < 0) | |
294 | goto nla_put_failure; | |
295 | ||
70ebe4a4 AB |
296 | hsr = netdev_priv(hsr_dev); |
297 | res = hsr_get_node_data(hsr, | |
f421436a AB |
298 | (unsigned char *) nla_data(info->attrs[HSR_A_NODE_ADDR]), |
299 | hsr_node_addr_b, | |
300 | &addr_b_ifindex, | |
301 | &hsr_node_if1_age, | |
302 | &hsr_node_if1_seq, | |
303 | &hsr_node_if2_age, | |
304 | &hsr_node_if2_seq); | |
305 | if (res < 0) | |
84a035f6 | 306 | goto nla_put_failure; |
f421436a AB |
307 | |
308 | res = nla_put(skb_out, HSR_A_NODE_ADDR, ETH_ALEN, | |
309 | nla_data(info->attrs[HSR_A_NODE_ADDR])); | |
310 | if (res < 0) | |
311 | goto nla_put_failure; | |
312 | ||
313 | if (addr_b_ifindex > -1) { | |
314 | res = nla_put(skb_out, HSR_A_NODE_ADDR_B, ETH_ALEN, | |
315 | hsr_node_addr_b); | |
316 | if (res < 0) | |
317 | goto nla_put_failure; | |
318 | ||
319 | res = nla_put_u32(skb_out, HSR_A_ADDR_B_IFINDEX, addr_b_ifindex); | |
320 | if (res < 0) | |
321 | goto nla_put_failure; | |
322 | } | |
323 | ||
324 | res = nla_put_u32(skb_out, HSR_A_IF1_AGE, hsr_node_if1_age); | |
325 | if (res < 0) | |
326 | goto nla_put_failure; | |
327 | res = nla_put_u16(skb_out, HSR_A_IF1_SEQ, hsr_node_if1_seq); | |
328 | if (res < 0) | |
329 | goto nla_put_failure; | |
51f3c605 | 330 | rcu_read_lock(); |
c5a75911 AB |
331 | port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_A); |
332 | if (port) | |
333 | res = nla_put_u32(skb_out, HSR_A_IF1_IFINDEX, | |
334 | port->dev->ifindex); | |
51f3c605 | 335 | rcu_read_unlock(); |
f421436a AB |
336 | if (res < 0) |
337 | goto nla_put_failure; | |
338 | ||
339 | res = nla_put_u32(skb_out, HSR_A_IF2_AGE, hsr_node_if2_age); | |
340 | if (res < 0) | |
341 | goto nla_put_failure; | |
342 | res = nla_put_u16(skb_out, HSR_A_IF2_SEQ, hsr_node_if2_seq); | |
343 | if (res < 0) | |
344 | goto nla_put_failure; | |
51f3c605 | 345 | rcu_read_lock(); |
c5a75911 AB |
346 | port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_B); |
347 | if (port) | |
348 | res = nla_put_u32(skb_out, HSR_A_IF2_IFINDEX, | |
349 | port->dev->ifindex); | |
51f3c605 AB |
350 | rcu_read_unlock(); |
351 | if (res < 0) | |
352 | goto nla_put_failure; | |
f421436a AB |
353 | |
354 | genlmsg_end(skb_out, msg_head); | |
355 | genlmsg_unicast(genl_info_net(info), skb_out, info->snd_portid); | |
356 | ||
357 | return 0; | |
358 | ||
359 | invalid: | |
360 | netlink_ack(skb_in, nlmsg_hdr(skb_in), -EINVAL); | |
361 | return 0; | |
362 | ||
363 | nla_put_failure: | |
364 | kfree_skb(skb_out); | |
365 | /* Fall through */ | |
366 | ||
367 | fail: | |
368 | return res; | |
369 | } | |
370 | ||
f266a683 | 371 | /* Get a list of MacAddressA of all nodes known to this node (including self). |
f421436a AB |
372 | */ |
373 | static int hsr_get_node_list(struct sk_buff *skb_in, struct genl_info *info) | |
374 | { | |
375 | /* For receiving */ | |
376 | struct nlattr *na; | |
377 | struct net_device *hsr_dev; | |
378 | ||
379 | /* For sending */ | |
380 | struct sk_buff *skb_out; | |
381 | void *msg_head; | |
70ebe4a4 | 382 | struct hsr_priv *hsr; |
f421436a AB |
383 | void *pos; |
384 | unsigned char addr[ETH_ALEN]; | |
385 | int res; | |
386 | ||
387 | if (!info) | |
388 | goto invalid; | |
389 | ||
390 | na = info->attrs[HSR_A_IFINDEX]; | |
391 | if (!na) | |
392 | goto invalid; | |
393 | ||
394 | hsr_dev = __dev_get_by_index(genl_info_net(info), | |
395 | nla_get_u32(info->attrs[HSR_A_IFINDEX])); | |
396 | if (!hsr_dev) | |
397 | goto invalid; | |
398 | if (!is_hsr_master(hsr_dev)) | |
399 | goto invalid; | |
400 | ||
401 | ||
402 | /* Send reply */ | |
403 | ||
404 | skb_out = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
405 | if (!skb_out) { | |
406 | res = -ENOMEM; | |
407 | goto fail; | |
408 | } | |
409 | ||
410 | msg_head = genlmsg_put(skb_out, NETLINK_CB(skb_in).portid, | |
411 | info->snd_seq, &hsr_genl_family, 0, | |
412 | HSR_C_SET_NODE_LIST); | |
413 | if (!msg_head) { | |
414 | res = -ENOMEM; | |
415 | goto nla_put_failure; | |
416 | } | |
417 | ||
418 | res = nla_put_u32(skb_out, HSR_A_IFINDEX, hsr_dev->ifindex); | |
419 | if (res < 0) | |
420 | goto nla_put_failure; | |
421 | ||
70ebe4a4 | 422 | hsr = netdev_priv(hsr_dev); |
f421436a AB |
423 | |
424 | rcu_read_lock(); | |
70ebe4a4 | 425 | pos = hsr_get_next_node(hsr, NULL, addr); |
f421436a AB |
426 | while (pos) { |
427 | res = nla_put(skb_out, HSR_A_NODE_ADDR, ETH_ALEN, addr); | |
428 | if (res < 0) { | |
429 | rcu_read_unlock(); | |
430 | goto nla_put_failure; | |
431 | } | |
70ebe4a4 | 432 | pos = hsr_get_next_node(hsr, pos, addr); |
f421436a AB |
433 | } |
434 | rcu_read_unlock(); | |
435 | ||
436 | genlmsg_end(skb_out, msg_head); | |
437 | genlmsg_unicast(genl_info_net(info), skb_out, info->snd_portid); | |
438 | ||
439 | return 0; | |
440 | ||
441 | invalid: | |
442 | netlink_ack(skb_in, nlmsg_hdr(skb_in), -EINVAL); | |
443 | return 0; | |
444 | ||
445 | nla_put_failure: | |
446 | kfree_skb(skb_out); | |
447 | /* Fall through */ | |
448 | ||
449 | fail: | |
450 | return res; | |
451 | } | |
452 | ||
453 | ||
4534de83 | 454 | static const struct genl_ops hsr_ops[] = { |
9504b3ee JB |
455 | { |
456 | .cmd = HSR_C_GET_NODE_STATUS, | |
457 | .flags = 0, | |
458 | .policy = hsr_genl_policy, | |
459 | .doit = hsr_get_node_status, | |
460 | .dumpit = NULL, | |
461 | }, | |
462 | { | |
463 | .cmd = HSR_C_GET_NODE_LIST, | |
464 | .flags = 0, | |
465 | .policy = hsr_genl_policy, | |
466 | .doit = hsr_get_node_list, | |
467 | .dumpit = NULL, | |
468 | }, | |
f421436a AB |
469 | }; |
470 | ||
471 | int __init hsr_netlink_init(void) | |
472 | { | |
473 | int rc; | |
474 | ||
475 | rc = rtnl_link_register(&hsr_link_ops); | |
476 | if (rc) | |
477 | goto fail_rtnl_link_register; | |
478 | ||
2a94fe48 JB |
479 | rc = genl_register_family_with_ops_groups(&hsr_genl_family, hsr_ops, |
480 | hsr_mcgrps); | |
f421436a AB |
481 | if (rc) |
482 | goto fail_genl_register_family; | |
483 | ||
f421436a AB |
484 | return 0; |
485 | ||
f421436a AB |
486 | fail_genl_register_family: |
487 | rtnl_link_unregister(&hsr_link_ops); | |
488 | fail_rtnl_link_register: | |
489 | ||
490 | return rc; | |
491 | } | |
492 | ||
493 | void __exit hsr_netlink_exit(void) | |
494 | { | |
f421436a | 495 | genl_unregister_family(&hsr_genl_family); |
f421436a AB |
496 | rtnl_link_unregister(&hsr_link_ops); |
497 | } | |
498 | ||
499 | MODULE_ALIAS_RTNL_LINK("hsr"); |