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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 }, |
f9375729 | 27 | [IFLA_HSR_SUPERVISION_ADDR] = { .len = ETH_ALEN }, |
98bf8362 | 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, | |
7a3f4a18 MS |
36 | struct nlattr *tb[], struct nlattr *data[], |
37 | struct netlink_ext_ack *extack) | |
f421436a AB |
38 | { |
39 | struct net_device *link[2]; | |
ee1c2797 | 40 | unsigned char multicast_spec, hsr_version; |
f421436a | 41 | |
a718dcc5 AB |
42 | if (!data) { |
43 | netdev_info(dev, "HSR: No slave devices specified\n"); | |
44 | return -EINVAL; | |
45 | } | |
f421436a | 46 | if (!data[IFLA_HSR_SLAVE1]) { |
a718dcc5 | 47 | netdev_info(dev, "HSR: Slave1 device not specified\n"); |
f421436a AB |
48 | return -EINVAL; |
49 | } | |
50 | link[0] = __dev_get_by_index(src_net, nla_get_u32(data[IFLA_HSR_SLAVE1])); | |
51 | if (!data[IFLA_HSR_SLAVE2]) { | |
a718dcc5 | 52 | netdev_info(dev, "HSR: Slave2 device not specified\n"); |
f421436a AB |
53 | return -EINVAL; |
54 | } | |
55 | link[1] = __dev_get_by_index(src_net, nla_get_u32(data[IFLA_HSR_SLAVE2])); | |
56 | ||
57 | if (!link[0] || !link[1]) | |
58 | return -ENODEV; | |
59 | if (link[0] == link[1]) | |
60 | return -EINVAL; | |
61 | ||
62 | if (!data[IFLA_HSR_MULTICAST_SPEC]) | |
63 | multicast_spec = 0; | |
64 | else | |
65 | multicast_spec = nla_get_u8(data[IFLA_HSR_MULTICAST_SPEC]); | |
66 | ||
ee1c2797 PH |
67 | if (!data[IFLA_HSR_VERSION]) |
68 | hsr_version = 0; | |
69 | else | |
70 | hsr_version = nla_get_u8(data[IFLA_HSR_VERSION]); | |
71 | ||
72 | return hsr_dev_finalize(dev, link, multicast_spec, hsr_version); | |
f421436a AB |
73 | } |
74 | ||
98bf8362 AB |
75 | static int hsr_fill_info(struct sk_buff *skb, const struct net_device *dev) |
76 | { | |
70ebe4a4 | 77 | struct hsr_priv *hsr; |
c5a75911 | 78 | struct hsr_port *port; |
51f3c605 | 79 | int res; |
98bf8362 | 80 | |
70ebe4a4 | 81 | hsr = netdev_priv(dev); |
98bf8362 | 82 | |
51f3c605 | 83 | res = 0; |
98bf8362 | 84 | |
51f3c605 | 85 | rcu_read_lock(); |
c5a75911 AB |
86 | port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_A); |
87 | if (port) | |
88 | res = nla_put_u32(skb, IFLA_HSR_SLAVE1, port->dev->ifindex); | |
51f3c605 AB |
89 | rcu_read_unlock(); |
90 | if (res) | |
91 | goto nla_put_failure; | |
92 | ||
93 | rcu_read_lock(); | |
c5a75911 AB |
94 | port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_B); |
95 | if (port) | |
96 | res = nla_put_u32(skb, IFLA_HSR_SLAVE2, port->dev->ifindex); | |
51f3c605 AB |
97 | rcu_read_unlock(); |
98 | if (res) | |
99 | goto nla_put_failure; | |
98bf8362 AB |
100 | |
101 | if (nla_put(skb, IFLA_HSR_SUPERVISION_ADDR, ETH_ALEN, | |
70ebe4a4 AB |
102 | hsr->sup_multicast_addr) || |
103 | nla_put_u16(skb, IFLA_HSR_SEQ_NR, hsr->sequence_nr)) | |
98bf8362 AB |
104 | goto nla_put_failure; |
105 | ||
106 | return 0; | |
107 | ||
108 | nla_put_failure: | |
109 | return -EMSGSIZE; | |
110 | } | |
111 | ||
f421436a AB |
112 | static struct rtnl_link_ops hsr_link_ops __read_mostly = { |
113 | .kind = "hsr", | |
114 | .maxtype = IFLA_HSR_MAX, | |
115 | .policy = hsr_policy, | |
116 | .priv_size = sizeof(struct hsr_priv), | |
117 | .setup = hsr_dev_setup, | |
118 | .newlink = hsr_newlink, | |
98bf8362 | 119 | .fill_info = hsr_fill_info, |
f421436a AB |
120 | }; |
121 | ||
122 | ||
123 | ||
124 | /* attribute policy */ | |
f421436a | 125 | static const struct nla_policy hsr_genl_policy[HSR_A_MAX + 1] = { |
f9375729 PH |
126 | [HSR_A_NODE_ADDR] = { .len = ETH_ALEN }, |
127 | [HSR_A_NODE_ADDR_B] = { .len = ETH_ALEN }, | |
f421436a AB |
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 | ||
489111e5 | 135 | static struct genl_family hsr_genl_family; |
f421436a | 136 | |
2a94fe48 JB |
137 | static const struct genl_multicast_group hsr_mcgrps[] = { |
138 | { .name = "hsr-network", }, | |
f421436a AB |
139 | }; |
140 | ||
141 | ||
142 | ||
143 | /* This is called if for some node with MAC address addr, we only get frames | |
144 | * over one of the slave interfaces. This would indicate an open network ring | |
145 | * (i.e. a link has failed somewhere). | |
146 | */ | |
70ebe4a4 | 147 | void hsr_nl_ringerror(struct hsr_priv *hsr, unsigned char addr[ETH_ALEN], |
c5a75911 | 148 | struct hsr_port *port) |
f421436a AB |
149 | { |
150 | struct sk_buff *skb; | |
151 | void *msg_head; | |
c5a75911 | 152 | struct hsr_port *master; |
f421436a | 153 | int res; |
f421436a AB |
154 | |
155 | skb = genlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC); | |
156 | if (!skb) | |
157 | goto fail; | |
158 | ||
159 | msg_head = genlmsg_put(skb, 0, 0, &hsr_genl_family, 0, HSR_C_RING_ERROR); | |
160 | if (!msg_head) | |
161 | goto nla_put_failure; | |
162 | ||
163 | res = nla_put(skb, HSR_A_NODE_ADDR, ETH_ALEN, addr); | |
164 | if (res < 0) | |
165 | goto nla_put_failure; | |
166 | ||
c5a75911 | 167 | res = nla_put_u32(skb, HSR_A_IFINDEX, port->dev->ifindex); |
f421436a AB |
168 | if (res < 0) |
169 | goto nla_put_failure; | |
170 | ||
171 | genlmsg_end(skb, msg_head); | |
2a94fe48 | 172 | genlmsg_multicast(&hsr_genl_family, skb, 0, 0, GFP_ATOMIC); |
f421436a AB |
173 | |
174 | return; | |
175 | ||
176 | nla_put_failure: | |
177 | kfree_skb(skb); | |
178 | ||
179 | fail: | |
c5a75911 AB |
180 | rcu_read_lock(); |
181 | master = hsr_port_get_hsr(hsr, HSR_PT_MASTER); | |
182 | netdev_warn(master->dev, "Could not send HSR ring error message\n"); | |
183 | rcu_read_unlock(); | |
f421436a AB |
184 | } |
185 | ||
186 | /* This is called when we haven't heard from the node with MAC address addr for | |
187 | * some time (just before the node is removed from the node table/list). | |
188 | */ | |
70ebe4a4 | 189 | void hsr_nl_nodedown(struct hsr_priv *hsr, unsigned char addr[ETH_ALEN]) |
f421436a AB |
190 | { |
191 | struct sk_buff *skb; | |
192 | void *msg_head; | |
c5a75911 | 193 | struct hsr_port *master; |
f421436a AB |
194 | int res; |
195 | ||
196 | skb = genlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC); | |
197 | if (!skb) | |
198 | goto fail; | |
199 | ||
200 | msg_head = genlmsg_put(skb, 0, 0, &hsr_genl_family, 0, HSR_C_NODE_DOWN); | |
201 | if (!msg_head) | |
202 | goto nla_put_failure; | |
203 | ||
204 | ||
205 | res = nla_put(skb, HSR_A_NODE_ADDR, ETH_ALEN, addr); | |
206 | if (res < 0) | |
207 | goto nla_put_failure; | |
208 | ||
209 | genlmsg_end(skb, msg_head); | |
2a94fe48 | 210 | genlmsg_multicast(&hsr_genl_family, skb, 0, 0, GFP_ATOMIC); |
f421436a AB |
211 | |
212 | return; | |
213 | ||
214 | nla_put_failure: | |
215 | kfree_skb(skb); | |
216 | ||
217 | fail: | |
c5a75911 AB |
218 | rcu_read_lock(); |
219 | master = hsr_port_get_hsr(hsr, HSR_PT_MASTER); | |
220 | netdev_warn(master->dev, "Could not send HSR node down\n"); | |
221 | rcu_read_unlock(); | |
f421436a AB |
222 | } |
223 | ||
224 | ||
225 | /* HSR_C_GET_NODE_STATUS lets userspace query the internal HSR node table | |
226 | * about the status of a specific node in the network, defined by its MAC | |
227 | * address. | |
228 | * | |
229 | * Input: hsr ifindex, node mac address | |
230 | * Output: hsr ifindex, node mac address (copied from request), | |
231 | * age of latest frame from node over slave 1, slave 2 [ms] | |
232 | */ | |
233 | static int hsr_get_node_status(struct sk_buff *skb_in, struct genl_info *info) | |
234 | { | |
235 | /* For receiving */ | |
236 | struct nlattr *na; | |
c5a75911 | 237 | struct net_device *hsr_dev; |
f421436a AB |
238 | |
239 | /* For sending */ | |
240 | struct sk_buff *skb_out; | |
241 | void *msg_head; | |
70ebe4a4 | 242 | struct hsr_priv *hsr; |
c5a75911 | 243 | struct hsr_port *port; |
f421436a AB |
244 | unsigned char hsr_node_addr_b[ETH_ALEN]; |
245 | int hsr_node_if1_age; | |
246 | u16 hsr_node_if1_seq; | |
247 | int hsr_node_if2_age; | |
248 | u16 hsr_node_if2_seq; | |
249 | int addr_b_ifindex; | |
250 | int res; | |
251 | ||
252 | if (!info) | |
253 | goto invalid; | |
254 | ||
255 | na = info->attrs[HSR_A_IFINDEX]; | |
256 | if (!na) | |
257 | goto invalid; | |
258 | na = info->attrs[HSR_A_NODE_ADDR]; | |
259 | if (!na) | |
260 | goto invalid; | |
261 | ||
262 | hsr_dev = __dev_get_by_index(genl_info_net(info), | |
263 | nla_get_u32(info->attrs[HSR_A_IFINDEX])); | |
264 | if (!hsr_dev) | |
265 | goto invalid; | |
266 | if (!is_hsr_master(hsr_dev)) | |
267 | goto invalid; | |
268 | ||
269 | ||
270 | /* Send reply */ | |
271 | ||
272 | skb_out = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
273 | if (!skb_out) { | |
274 | res = -ENOMEM; | |
275 | goto fail; | |
276 | } | |
277 | ||
278 | msg_head = genlmsg_put(skb_out, NETLINK_CB(skb_in).portid, | |
279 | info->snd_seq, &hsr_genl_family, 0, | |
280 | HSR_C_SET_NODE_STATUS); | |
281 | if (!msg_head) { | |
282 | res = -ENOMEM; | |
283 | goto nla_put_failure; | |
284 | } | |
285 | ||
286 | res = nla_put_u32(skb_out, HSR_A_IFINDEX, hsr_dev->ifindex); | |
287 | if (res < 0) | |
288 | goto nla_put_failure; | |
289 | ||
70ebe4a4 AB |
290 | hsr = netdev_priv(hsr_dev); |
291 | res = hsr_get_node_data(hsr, | |
f421436a AB |
292 | (unsigned char *) nla_data(info->attrs[HSR_A_NODE_ADDR]), |
293 | hsr_node_addr_b, | |
294 | &addr_b_ifindex, | |
295 | &hsr_node_if1_age, | |
296 | &hsr_node_if1_seq, | |
297 | &hsr_node_if2_age, | |
298 | &hsr_node_if2_seq); | |
299 | if (res < 0) | |
84a035f6 | 300 | goto nla_put_failure; |
f421436a AB |
301 | |
302 | res = nla_put(skb_out, HSR_A_NODE_ADDR, ETH_ALEN, | |
303 | nla_data(info->attrs[HSR_A_NODE_ADDR])); | |
304 | if (res < 0) | |
305 | goto nla_put_failure; | |
306 | ||
307 | if (addr_b_ifindex > -1) { | |
308 | res = nla_put(skb_out, HSR_A_NODE_ADDR_B, ETH_ALEN, | |
309 | hsr_node_addr_b); | |
310 | if (res < 0) | |
311 | goto nla_put_failure; | |
312 | ||
313 | res = nla_put_u32(skb_out, HSR_A_ADDR_B_IFINDEX, addr_b_ifindex); | |
314 | if (res < 0) | |
315 | goto nla_put_failure; | |
316 | } | |
317 | ||
318 | res = nla_put_u32(skb_out, HSR_A_IF1_AGE, hsr_node_if1_age); | |
319 | if (res < 0) | |
320 | goto nla_put_failure; | |
321 | res = nla_put_u16(skb_out, HSR_A_IF1_SEQ, hsr_node_if1_seq); | |
322 | if (res < 0) | |
323 | goto nla_put_failure; | |
51f3c605 | 324 | rcu_read_lock(); |
c5a75911 AB |
325 | port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_A); |
326 | if (port) | |
327 | res = nla_put_u32(skb_out, HSR_A_IF1_IFINDEX, | |
328 | port->dev->ifindex); | |
51f3c605 | 329 | rcu_read_unlock(); |
f421436a AB |
330 | if (res < 0) |
331 | goto nla_put_failure; | |
332 | ||
333 | res = nla_put_u32(skb_out, HSR_A_IF2_AGE, hsr_node_if2_age); | |
334 | if (res < 0) | |
335 | goto nla_put_failure; | |
336 | res = nla_put_u16(skb_out, HSR_A_IF2_SEQ, hsr_node_if2_seq); | |
337 | if (res < 0) | |
338 | goto nla_put_failure; | |
51f3c605 | 339 | rcu_read_lock(); |
c5a75911 AB |
340 | port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_B); |
341 | if (port) | |
342 | res = nla_put_u32(skb_out, HSR_A_IF2_IFINDEX, | |
343 | port->dev->ifindex); | |
51f3c605 AB |
344 | rcu_read_unlock(); |
345 | if (res < 0) | |
346 | goto nla_put_failure; | |
f421436a AB |
347 | |
348 | genlmsg_end(skb_out, msg_head); | |
349 | genlmsg_unicast(genl_info_net(info), skb_out, info->snd_portid); | |
350 | ||
351 | return 0; | |
352 | ||
353 | invalid: | |
2d4bc933 | 354 | netlink_ack(skb_in, nlmsg_hdr(skb_in), -EINVAL, NULL); |
f421436a AB |
355 | return 0; |
356 | ||
357 | nla_put_failure: | |
358 | kfree_skb(skb_out); | |
359 | /* Fall through */ | |
360 | ||
361 | fail: | |
362 | return res; | |
363 | } | |
364 | ||
f266a683 | 365 | /* Get a list of MacAddressA of all nodes known to this node (including self). |
f421436a AB |
366 | */ |
367 | static int hsr_get_node_list(struct sk_buff *skb_in, struct genl_info *info) | |
368 | { | |
369 | /* For receiving */ | |
370 | struct nlattr *na; | |
371 | struct net_device *hsr_dev; | |
372 | ||
373 | /* For sending */ | |
374 | struct sk_buff *skb_out; | |
375 | void *msg_head; | |
70ebe4a4 | 376 | struct hsr_priv *hsr; |
f421436a AB |
377 | void *pos; |
378 | unsigned char addr[ETH_ALEN]; | |
379 | int res; | |
380 | ||
381 | if (!info) | |
382 | goto invalid; | |
383 | ||
384 | na = info->attrs[HSR_A_IFINDEX]; | |
385 | if (!na) | |
386 | goto invalid; | |
387 | ||
388 | hsr_dev = __dev_get_by_index(genl_info_net(info), | |
389 | nla_get_u32(info->attrs[HSR_A_IFINDEX])); | |
390 | if (!hsr_dev) | |
391 | goto invalid; | |
392 | if (!is_hsr_master(hsr_dev)) | |
393 | goto invalid; | |
394 | ||
395 | ||
396 | /* Send reply */ | |
397 | ||
398 | skb_out = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
399 | if (!skb_out) { | |
400 | res = -ENOMEM; | |
401 | goto fail; | |
402 | } | |
403 | ||
404 | msg_head = genlmsg_put(skb_out, NETLINK_CB(skb_in).portid, | |
405 | info->snd_seq, &hsr_genl_family, 0, | |
406 | HSR_C_SET_NODE_LIST); | |
407 | if (!msg_head) { | |
408 | res = -ENOMEM; | |
409 | goto nla_put_failure; | |
410 | } | |
411 | ||
412 | res = nla_put_u32(skb_out, HSR_A_IFINDEX, hsr_dev->ifindex); | |
413 | if (res < 0) | |
414 | goto nla_put_failure; | |
415 | ||
70ebe4a4 | 416 | hsr = netdev_priv(hsr_dev); |
f421436a AB |
417 | |
418 | rcu_read_lock(); | |
70ebe4a4 | 419 | pos = hsr_get_next_node(hsr, NULL, addr); |
f421436a AB |
420 | while (pos) { |
421 | res = nla_put(skb_out, HSR_A_NODE_ADDR, ETH_ALEN, addr); | |
422 | if (res < 0) { | |
423 | rcu_read_unlock(); | |
424 | goto nla_put_failure; | |
425 | } | |
70ebe4a4 | 426 | pos = hsr_get_next_node(hsr, pos, addr); |
f421436a AB |
427 | } |
428 | rcu_read_unlock(); | |
429 | ||
430 | genlmsg_end(skb_out, msg_head); | |
431 | genlmsg_unicast(genl_info_net(info), skb_out, info->snd_portid); | |
432 | ||
433 | return 0; | |
434 | ||
435 | invalid: | |
2d4bc933 | 436 | netlink_ack(skb_in, nlmsg_hdr(skb_in), -EINVAL, NULL); |
f421436a AB |
437 | return 0; |
438 | ||
439 | nla_put_failure: | |
440 | kfree_skb(skb_out); | |
441 | /* Fall through */ | |
442 | ||
443 | fail: | |
444 | return res; | |
445 | } | |
446 | ||
447 | ||
4534de83 | 448 | static const struct genl_ops hsr_ops[] = { |
9504b3ee JB |
449 | { |
450 | .cmd = HSR_C_GET_NODE_STATUS, | |
451 | .flags = 0, | |
452 | .policy = hsr_genl_policy, | |
453 | .doit = hsr_get_node_status, | |
454 | .dumpit = NULL, | |
455 | }, | |
456 | { | |
457 | .cmd = HSR_C_GET_NODE_LIST, | |
458 | .flags = 0, | |
459 | .policy = hsr_genl_policy, | |
460 | .doit = hsr_get_node_list, | |
461 | .dumpit = NULL, | |
462 | }, | |
f421436a AB |
463 | }; |
464 | ||
56989f6d | 465 | static struct genl_family hsr_genl_family __ro_after_init = { |
489111e5 JB |
466 | .hdrsize = 0, |
467 | .name = "HSR", | |
468 | .version = 1, | |
469 | .maxattr = HSR_A_MAX, | |
470 | .module = THIS_MODULE, | |
471 | .ops = hsr_ops, | |
472 | .n_ops = ARRAY_SIZE(hsr_ops), | |
473 | .mcgrps = hsr_mcgrps, | |
474 | .n_mcgrps = ARRAY_SIZE(hsr_mcgrps), | |
475 | }; | |
476 | ||
f421436a AB |
477 | int __init hsr_netlink_init(void) |
478 | { | |
479 | int rc; | |
480 | ||
481 | rc = rtnl_link_register(&hsr_link_ops); | |
482 | if (rc) | |
483 | goto fail_rtnl_link_register; | |
484 | ||
489111e5 | 485 | rc = genl_register_family(&hsr_genl_family); |
f421436a AB |
486 | if (rc) |
487 | goto fail_genl_register_family; | |
488 | ||
f421436a AB |
489 | return 0; |
490 | ||
f421436a AB |
491 | fail_genl_register_family: |
492 | rtnl_link_unregister(&hsr_link_ops); | |
493 | fail_rtnl_link_register: | |
494 | ||
495 | return rc; | |
496 | } | |
497 | ||
498 | void __exit hsr_netlink_exit(void) | |
499 | { | |
f421436a | 500 | genl_unregister_family(&hsr_genl_family); |
f421436a AB |
501 | rtnl_link_unregister(&hsr_link_ops); |
502 | } | |
503 | ||
504 | MODULE_ALIAS_RTNL_LINK("hsr"); |