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1// SPDX-License-Identifier: GPL-2.0
2/* Copyright 2011-2014 Autronica Fire and Security AS
3 *
4 * Author(s):
5 * 2011-2014 Arvid Brodin, arvid.brodin@alten.se
6 *
7 * Routines for handling Netlink messages for HSR and PRP.
8 */
9
10#include "hsr_netlink.h"
11#include <linux/kernel.h>
12#include <net/rtnetlink.h>
13#include <net/genetlink.h>
14#include "hsr_main.h"
15#include "hsr_device.h"
16#include "hsr_framereg.h"
17
18static const struct nla_policy hsr_policy[IFLA_HSR_MAX + 1] = {
19 [IFLA_HSR_SLAVE1] = { .type = NLA_U32 },
20 [IFLA_HSR_SLAVE2] = { .type = NLA_U32 },
21 [IFLA_HSR_MULTICAST_SPEC] = { .type = NLA_U8 },
22 [IFLA_HSR_VERSION] = { .type = NLA_U8 },
23 [IFLA_HSR_SUPERVISION_ADDR] = { .len = ETH_ALEN },
24 [IFLA_HSR_SEQ_NR] = { .type = NLA_U16 },
25 [IFLA_HSR_PROTOCOL] = { .type = NLA_U8 },
26 [IFLA_HSR_INTERLINK] = { .type = NLA_U32 },
27};
28
29/* Here, it seems a netdevice has already been allocated for us, and the
30 * hsr_dev_setup routine has been executed. Nice!
31 */
32static int hsr_newlink(struct net *src_net, struct net_device *dev,
33 struct nlattr *tb[], struct nlattr *data[],
34 struct netlink_ext_ack *extack)
35{
36 enum hsr_version proto_version;
37 unsigned char multicast_spec;
38 u8 proto = HSR_PROTOCOL_HSR;
39
40 struct net_device *link[2], *interlink = NULL;
41 if (!data) {
42 NL_SET_ERR_MSG_MOD(extack, "No slave devices specified");
43 return -EINVAL;
44 }
45 if (!data[IFLA_HSR_SLAVE1]) {
46 NL_SET_ERR_MSG_MOD(extack, "Slave1 device not specified");
47 return -EINVAL;
48 }
49 link[0] = __dev_get_by_index(src_net,
50 nla_get_u32(data[IFLA_HSR_SLAVE1]));
51 if (!link[0]) {
52 NL_SET_ERR_MSG_MOD(extack, "Slave1 does not exist");
53 return -EINVAL;
54 }
55 if (!data[IFLA_HSR_SLAVE2]) {
56 NL_SET_ERR_MSG_MOD(extack, "Slave2 device not specified");
57 return -EINVAL;
58 }
59 link[1] = __dev_get_by_index(src_net,
60 nla_get_u32(data[IFLA_HSR_SLAVE2]));
61 if (!link[1]) {
62 NL_SET_ERR_MSG_MOD(extack, "Slave2 does not exist");
63 return -EINVAL;
64 }
65
66 if (link[0] == link[1]) {
67 NL_SET_ERR_MSG_MOD(extack, "Slave1 and Slave2 are same");
68 return -EINVAL;
69 }
70
71 if (data[IFLA_HSR_INTERLINK])
72 interlink = __dev_get_by_index(src_net,
73 nla_get_u32(data[IFLA_HSR_INTERLINK]));
74
75 if (interlink && interlink == link[0]) {
76 NL_SET_ERR_MSG_MOD(extack, "Interlink and Slave1 are the same");
77 return -EINVAL;
78 }
79
80 if (interlink && interlink == link[1]) {
81 NL_SET_ERR_MSG_MOD(extack, "Interlink and Slave2 are the same");
82 return -EINVAL;
83 }
84
85 multicast_spec = nla_get_u8_default(data[IFLA_HSR_MULTICAST_SPEC], 0);
86
87 if (data[IFLA_HSR_PROTOCOL])
88 proto = nla_get_u8(data[IFLA_HSR_PROTOCOL]);
89
90 if (proto >= HSR_PROTOCOL_MAX) {
91 NL_SET_ERR_MSG_MOD(extack, "Unsupported protocol");
92 return -EINVAL;
93 }
94
95 if (!data[IFLA_HSR_VERSION]) {
96 proto_version = HSR_V0;
97 } else {
98 if (proto == HSR_PROTOCOL_PRP) {
99 NL_SET_ERR_MSG_MOD(extack, "PRP version unsupported");
100 return -EINVAL;
101 }
102
103 proto_version = nla_get_u8(data[IFLA_HSR_VERSION]);
104 if (proto_version > HSR_V1) {
105 NL_SET_ERR_MSG_MOD(extack,
106 "Only HSR version 0/1 supported");
107 return -EINVAL;
108 }
109 }
110
111 if (proto == HSR_PROTOCOL_PRP) {
112 proto_version = PRP_V1;
113 if (interlink) {
114 NL_SET_ERR_MSG_MOD(extack,
115 "Interlink only works with HSR");
116 return -EINVAL;
117 }
118 }
119
120 return hsr_dev_finalize(dev, link, interlink, multicast_spec,
121 proto_version, extack);
122}
123
124static void hsr_dellink(struct net_device *dev, struct list_head *head)
125{
126 struct hsr_priv *hsr = netdev_priv(dev);
127
128 timer_delete_sync(&hsr->prune_timer);
129 timer_delete_sync(&hsr->prune_proxy_timer);
130 timer_delete_sync(&hsr->announce_timer);
131 timer_delete_sync(&hsr->announce_proxy_timer);
132
133 hsr_debugfs_term(hsr);
134 hsr_del_ports(hsr);
135
136 hsr_del_self_node(hsr);
137 hsr_del_nodes(&hsr->node_db);
138 hsr_del_nodes(&hsr->proxy_node_db);
139
140 unregister_netdevice_queue(dev, head);
141}
142
143static int hsr_fill_info(struct sk_buff *skb, const struct net_device *dev)
144{
145 struct hsr_priv *hsr = netdev_priv(dev);
146 u8 proto = HSR_PROTOCOL_HSR;
147 struct hsr_port *port;
148
149 port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_A);
150 if (port) {
151 if (nla_put_u32(skb, IFLA_HSR_SLAVE1, port->dev->ifindex))
152 goto nla_put_failure;
153 }
154
155 port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_B);
156 if (port) {
157 if (nla_put_u32(skb, IFLA_HSR_SLAVE2, port->dev->ifindex))
158 goto nla_put_failure;
159 }
160
161 if (nla_put(skb, IFLA_HSR_SUPERVISION_ADDR, ETH_ALEN,
162 hsr->sup_multicast_addr) ||
163 nla_put_u16(skb, IFLA_HSR_SEQ_NR, hsr->sequence_nr))
164 goto nla_put_failure;
165 if (hsr->prot_version == PRP_V1)
166 proto = HSR_PROTOCOL_PRP;
167 if (nla_put_u8(skb, IFLA_HSR_PROTOCOL, proto))
168 goto nla_put_failure;
169
170 return 0;
171
172nla_put_failure:
173 return -EMSGSIZE;
174}
175
176static struct rtnl_link_ops hsr_link_ops __read_mostly = {
177 .kind = "hsr",
178 .maxtype = IFLA_HSR_MAX,
179 .policy = hsr_policy,
180 .priv_size = sizeof(struct hsr_priv),
181 .setup = hsr_dev_setup,
182 .newlink = hsr_newlink,
183 .dellink = hsr_dellink,
184 .fill_info = hsr_fill_info,
185};
186
187/* attribute policy */
188static const struct nla_policy hsr_genl_policy[HSR_A_MAX + 1] = {
189 [HSR_A_NODE_ADDR] = { .len = ETH_ALEN },
190 [HSR_A_NODE_ADDR_B] = { .len = ETH_ALEN },
191 [HSR_A_IFINDEX] = { .type = NLA_U32 },
192 [HSR_A_IF1_AGE] = { .type = NLA_U32 },
193 [HSR_A_IF2_AGE] = { .type = NLA_U32 },
194 [HSR_A_IF1_SEQ] = { .type = NLA_U16 },
195 [HSR_A_IF2_SEQ] = { .type = NLA_U16 },
196};
197
198static struct genl_family hsr_genl_family;
199
200static const struct genl_multicast_group hsr_mcgrps[] = {
201 { .name = "hsr-network", },
202};
203
204/* This is called if for some node with MAC address addr, we only get frames
205 * over one of the slave interfaces. This would indicate an open network ring
206 * (i.e. a link has failed somewhere).
207 */
208void hsr_nl_ringerror(struct hsr_priv *hsr, unsigned char addr[ETH_ALEN],
209 struct hsr_port *port)
210{
211 struct sk_buff *skb;
212 void *msg_head;
213 struct hsr_port *master;
214 int res;
215
216 skb = genlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
217 if (!skb)
218 goto fail;
219
220 msg_head = genlmsg_put(skb, 0, 0, &hsr_genl_family, 0,
221 HSR_C_RING_ERROR);
222 if (!msg_head)
223 goto nla_put_failure;
224
225 res = nla_put(skb, HSR_A_NODE_ADDR, ETH_ALEN, addr);
226 if (res < 0)
227 goto nla_put_failure;
228
229 res = nla_put_u32(skb, HSR_A_IFINDEX, port->dev->ifindex);
230 if (res < 0)
231 goto nla_put_failure;
232
233 genlmsg_end(skb, msg_head);
234 genlmsg_multicast(&hsr_genl_family, skb, 0, 0, GFP_ATOMIC);
235
236 return;
237
238nla_put_failure:
239 kfree_skb(skb);
240
241fail:
242 rcu_read_lock();
243 master = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
244 netdev_warn(master->dev, "Could not send HSR ring error message\n");
245 rcu_read_unlock();
246}
247
248/* This is called when we haven't heard from the node with MAC address addr for
249 * some time (just before the node is removed from the node table/list).
250 */
251void hsr_nl_nodedown(struct hsr_priv *hsr, unsigned char addr[ETH_ALEN])
252{
253 struct sk_buff *skb;
254 void *msg_head;
255 struct hsr_port *master;
256 int res;
257
258 skb = genlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
259 if (!skb)
260 goto fail;
261
262 msg_head = genlmsg_put(skb, 0, 0, &hsr_genl_family, 0, HSR_C_NODE_DOWN);
263 if (!msg_head)
264 goto nla_put_failure;
265
266 res = nla_put(skb, HSR_A_NODE_ADDR, ETH_ALEN, addr);
267 if (res < 0)
268 goto nla_put_failure;
269
270 genlmsg_end(skb, msg_head);
271 genlmsg_multicast(&hsr_genl_family, skb, 0, 0, GFP_ATOMIC);
272
273 return;
274
275nla_put_failure:
276 kfree_skb(skb);
277
278fail:
279 rcu_read_lock();
280 master = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
281 netdev_warn(master->dev, "Could not send HSR node down\n");
282 rcu_read_unlock();
283}
284
285/* HSR_C_GET_NODE_STATUS lets userspace query the internal HSR node table
286 * about the status of a specific node in the network, defined by its MAC
287 * address.
288 *
289 * Input: hsr ifindex, node mac address
290 * Output: hsr ifindex, node mac address (copied from request),
291 * age of latest frame from node over slave 1, slave 2 [ms]
292 */
293static int hsr_get_node_status(struct sk_buff *skb_in, struct genl_info *info)
294{
295 /* For receiving */
296 struct nlattr *na;
297 struct net_device *hsr_dev;
298
299 /* For sending */
300 struct sk_buff *skb_out;
301 void *msg_head;
302 struct hsr_priv *hsr;
303 struct hsr_port *port;
304 unsigned char hsr_node_addr_b[ETH_ALEN];
305 int hsr_node_if1_age;
306 u16 hsr_node_if1_seq;
307 int hsr_node_if2_age;
308 u16 hsr_node_if2_seq;
309 int addr_b_ifindex;
310 int res;
311
312 if (!info)
313 goto invalid;
314
315 na = info->attrs[HSR_A_IFINDEX];
316 if (!na)
317 goto invalid;
318 na = info->attrs[HSR_A_NODE_ADDR];
319 if (!na)
320 goto invalid;
321
322 rcu_read_lock();
323 hsr_dev = dev_get_by_index_rcu(genl_info_net(info),
324 nla_get_u32(info->attrs[HSR_A_IFINDEX]));
325 if (!hsr_dev)
326 goto rcu_unlock;
327 if (!is_hsr_master(hsr_dev))
328 goto rcu_unlock;
329
330 /* Send reply */
331 skb_out = genlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
332 if (!skb_out) {
333 res = -ENOMEM;
334 goto fail;
335 }
336
337 msg_head = genlmsg_put(skb_out, NETLINK_CB(skb_in).portid,
338 info->snd_seq, &hsr_genl_family, 0,
339 HSR_C_SET_NODE_STATUS);
340 if (!msg_head) {
341 res = -ENOMEM;
342 goto nla_put_failure;
343 }
344
345 res = nla_put_u32(skb_out, HSR_A_IFINDEX, hsr_dev->ifindex);
346 if (res < 0)
347 goto nla_put_failure;
348
349 hsr = netdev_priv(hsr_dev);
350 res = hsr_get_node_data(hsr,
351 (unsigned char *)
352 nla_data(info->attrs[HSR_A_NODE_ADDR]),
353 hsr_node_addr_b,
354 &addr_b_ifindex,
355 &hsr_node_if1_age,
356 &hsr_node_if1_seq,
357 &hsr_node_if2_age,
358 &hsr_node_if2_seq);
359 if (res < 0)
360 goto nla_put_failure;
361
362 res = nla_put(skb_out, HSR_A_NODE_ADDR, ETH_ALEN,
363 nla_data(info->attrs[HSR_A_NODE_ADDR]));
364 if (res < 0)
365 goto nla_put_failure;
366
367 if (addr_b_ifindex > -1) {
368 res = nla_put(skb_out, HSR_A_NODE_ADDR_B, ETH_ALEN,
369 hsr_node_addr_b);
370 if (res < 0)
371 goto nla_put_failure;
372
373 res = nla_put_u32(skb_out, HSR_A_ADDR_B_IFINDEX,
374 addr_b_ifindex);
375 if (res < 0)
376 goto nla_put_failure;
377 }
378
379 res = nla_put_u32(skb_out, HSR_A_IF1_AGE, hsr_node_if1_age);
380 if (res < 0)
381 goto nla_put_failure;
382 res = nla_put_u16(skb_out, HSR_A_IF1_SEQ, hsr_node_if1_seq);
383 if (res < 0)
384 goto nla_put_failure;
385 port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_A);
386 if (port)
387 res = nla_put_u32(skb_out, HSR_A_IF1_IFINDEX,
388 port->dev->ifindex);
389 if (res < 0)
390 goto nla_put_failure;
391
392 res = nla_put_u32(skb_out, HSR_A_IF2_AGE, hsr_node_if2_age);
393 if (res < 0)
394 goto nla_put_failure;
395 res = nla_put_u16(skb_out, HSR_A_IF2_SEQ, hsr_node_if2_seq);
396 if (res < 0)
397 goto nla_put_failure;
398 port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_B);
399 if (port)
400 res = nla_put_u32(skb_out, HSR_A_IF2_IFINDEX,
401 port->dev->ifindex);
402 if (res < 0)
403 goto nla_put_failure;
404
405 rcu_read_unlock();
406
407 genlmsg_end(skb_out, msg_head);
408 genlmsg_unicast(genl_info_net(info), skb_out, info->snd_portid);
409
410 return 0;
411
412rcu_unlock:
413 rcu_read_unlock();
414invalid:
415 netlink_ack(skb_in, nlmsg_hdr(skb_in), -EINVAL, NULL);
416 return 0;
417
418nla_put_failure:
419 kfree_skb(skb_out);
420 /* Fall through */
421
422fail:
423 rcu_read_unlock();
424 return res;
425}
426
427/* Get a list of MacAddressA of all nodes known to this node (including self).
428 */
429static int hsr_get_node_list(struct sk_buff *skb_in, struct genl_info *info)
430{
431 unsigned char addr[ETH_ALEN];
432 struct net_device *hsr_dev;
433 struct sk_buff *skb_out;
434 struct hsr_priv *hsr;
435 bool restart = false;
436 struct nlattr *na;
437 void *pos = NULL;
438 void *msg_head;
439 int res;
440
441 if (!info)
442 goto invalid;
443
444 na = info->attrs[HSR_A_IFINDEX];
445 if (!na)
446 goto invalid;
447
448 rcu_read_lock();
449 hsr_dev = dev_get_by_index_rcu(genl_info_net(info),
450 nla_get_u32(info->attrs[HSR_A_IFINDEX]));
451 if (!hsr_dev)
452 goto rcu_unlock;
453 if (!is_hsr_master(hsr_dev))
454 goto rcu_unlock;
455
456restart:
457 /* Send reply */
458 skb_out = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_ATOMIC);
459 if (!skb_out) {
460 res = -ENOMEM;
461 goto fail;
462 }
463
464 msg_head = genlmsg_put(skb_out, NETLINK_CB(skb_in).portid,
465 info->snd_seq, &hsr_genl_family, 0,
466 HSR_C_SET_NODE_LIST);
467 if (!msg_head) {
468 res = -ENOMEM;
469 goto nla_put_failure;
470 }
471
472 if (!restart) {
473 res = nla_put_u32(skb_out, HSR_A_IFINDEX, hsr_dev->ifindex);
474 if (res < 0)
475 goto nla_put_failure;
476 }
477
478 hsr = netdev_priv(hsr_dev);
479
480 if (!pos)
481 pos = hsr_get_next_node(hsr, NULL, addr);
482 while (pos) {
483 res = nla_put(skb_out, HSR_A_NODE_ADDR, ETH_ALEN, addr);
484 if (res < 0) {
485 if (res == -EMSGSIZE) {
486 genlmsg_end(skb_out, msg_head);
487 genlmsg_unicast(genl_info_net(info), skb_out,
488 info->snd_portid);
489 restart = true;
490 goto restart;
491 }
492 goto nla_put_failure;
493 }
494 pos = hsr_get_next_node(hsr, pos, addr);
495 }
496 rcu_read_unlock();
497
498 genlmsg_end(skb_out, msg_head);
499 genlmsg_unicast(genl_info_net(info), skb_out, info->snd_portid);
500
501 return 0;
502
503rcu_unlock:
504 rcu_read_unlock();
505invalid:
506 netlink_ack(skb_in, nlmsg_hdr(skb_in), -EINVAL, NULL);
507 return 0;
508
509nla_put_failure:
510 nlmsg_free(skb_out);
511 /* Fall through */
512
513fail:
514 rcu_read_unlock();
515 return res;
516}
517
518static const struct genl_small_ops hsr_ops[] = {
519 {
520 .cmd = HSR_C_GET_NODE_STATUS,
521 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
522 .flags = 0,
523 .doit = hsr_get_node_status,
524 .dumpit = NULL,
525 },
526 {
527 .cmd = HSR_C_GET_NODE_LIST,
528 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
529 .flags = 0,
530 .doit = hsr_get_node_list,
531 .dumpit = NULL,
532 },
533};
534
535static struct genl_family hsr_genl_family __ro_after_init = {
536 .hdrsize = 0,
537 .name = "HSR",
538 .version = 1,
539 .maxattr = HSR_A_MAX,
540 .policy = hsr_genl_policy,
541 .netnsok = true,
542 .module = THIS_MODULE,
543 .small_ops = hsr_ops,
544 .n_small_ops = ARRAY_SIZE(hsr_ops),
545 .resv_start_op = HSR_C_SET_NODE_LIST + 1,
546 .mcgrps = hsr_mcgrps,
547 .n_mcgrps = ARRAY_SIZE(hsr_mcgrps),
548};
549
550int __init hsr_netlink_init(void)
551{
552 int rc;
553
554 rc = rtnl_link_register(&hsr_link_ops);
555 if (rc)
556 goto fail_rtnl_link_register;
557
558 rc = genl_register_family(&hsr_genl_family);
559 if (rc)
560 goto fail_genl_register_family;
561
562 hsr_debugfs_create_root();
563 return 0;
564
565fail_genl_register_family:
566 rtnl_link_unregister(&hsr_link_ops);
567fail_rtnl_link_register:
568
569 return rc;
570}
571
572void __exit hsr_netlink_exit(void)
573{
574 genl_unregister_family(&hsr_genl_family);
575 rtnl_link_unregister(&hsr_link_ops);
576}
577
578MODULE_ALIAS_RTNL_LINK("hsr");
1/* Copyright 2011-2013 Autronica Fire and Security AS
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):
9 * 2011-2013 Arvid Brodin, arvid.brodin@xdin.com
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
22static 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 },
26 [IFLA_HSR_SUPERVISION_ADDR] = { .type = NLA_BINARY, .len = ETH_ALEN },
27 [IFLA_HSR_SEQ_NR] = { .type = NLA_U16 },
28};
29
30
31/* Here, it seems a netdevice has already been allocated for us, and the
32 * hsr_dev_setup routine has been executed. Nice!
33 */
34static int hsr_newlink(struct net *src_net, struct net_device *dev,
35 struct nlattr *tb[], struct nlattr *data[])
36{
37 struct net_device *link[2];
38 unsigned char multicast_spec;
39
40 if (!data[IFLA_HSR_SLAVE1]) {
41 netdev_info(dev, "IFLA_HSR_SLAVE1 missing!\n");
42 return -EINVAL;
43 }
44 link[0] = __dev_get_by_index(src_net, nla_get_u32(data[IFLA_HSR_SLAVE1]));
45 if (!data[IFLA_HSR_SLAVE2]) {
46 netdev_info(dev, "IFLA_HSR_SLAVE2 missing!\n");
47 return -EINVAL;
48 }
49 link[1] = __dev_get_by_index(src_net, nla_get_u32(data[IFLA_HSR_SLAVE2]));
50
51 if (!link[0] || !link[1])
52 return -ENODEV;
53 if (link[0] == link[1])
54 return -EINVAL;
55
56 if (!data[IFLA_HSR_MULTICAST_SPEC])
57 multicast_spec = 0;
58 else
59 multicast_spec = nla_get_u8(data[IFLA_HSR_MULTICAST_SPEC]);
60
61 return hsr_dev_finalize(dev, link, multicast_spec);
62}
63
64static int hsr_fill_info(struct sk_buff *skb, const struct net_device *dev)
65{
66 struct hsr_priv *hsr_priv;
67
68 hsr_priv = netdev_priv(dev);
69
70 if (hsr_priv->slave[0])
71 if (nla_put_u32(skb, IFLA_HSR_SLAVE1, hsr_priv->slave[0]->ifindex))
72 goto nla_put_failure;
73
74 if (hsr_priv->slave[1])
75 if (nla_put_u32(skb, IFLA_HSR_SLAVE2, hsr_priv->slave[1]->ifindex))
76 goto nla_put_failure;
77
78 if (nla_put(skb, IFLA_HSR_SUPERVISION_ADDR, ETH_ALEN,
79 hsr_priv->sup_multicast_addr) ||
80 nla_put_u16(skb, IFLA_HSR_SEQ_NR, hsr_priv->sequence_nr))
81 goto nla_put_failure;
82
83 return 0;
84
85nla_put_failure:
86 return -EMSGSIZE;
87}
88
89static struct rtnl_link_ops hsr_link_ops __read_mostly = {
90 .kind = "hsr",
91 .maxtype = IFLA_HSR_MAX,
92 .policy = hsr_policy,
93 .priv_size = sizeof(struct hsr_priv),
94 .setup = hsr_dev_setup,
95 .newlink = hsr_newlink,
96 .fill_info = hsr_fill_info,
97};
98
99
100
101/* attribute policy */
102/* NLA_BINARY missing in libnl; use NLA_UNSPEC in userspace instead. */
103static const struct nla_policy hsr_genl_policy[HSR_A_MAX + 1] = {
104 [HSR_A_NODE_ADDR] = { .type = NLA_BINARY, .len = ETH_ALEN },
105 [HSR_A_NODE_ADDR_B] = { .type = NLA_BINARY, .len = ETH_ALEN },
106 [HSR_A_IFINDEX] = { .type = NLA_U32 },
107 [HSR_A_IF1_AGE] = { .type = NLA_U32 },
108 [HSR_A_IF2_AGE] = { .type = NLA_U32 },
109 [HSR_A_IF1_SEQ] = { .type = NLA_U16 },
110 [HSR_A_IF2_SEQ] = { .type = NLA_U16 },
111};
112
113static struct genl_family hsr_genl_family = {
114 .id = GENL_ID_GENERATE,
115 .hdrsize = 0,
116 .name = "HSR",
117 .version = 1,
118 .maxattr = HSR_A_MAX,
119};
120
121static const struct genl_multicast_group hsr_mcgrps[] = {
122 { .name = "hsr-network", },
123};
124
125
126
127/* This is called if for some node with MAC address addr, we only get frames
128 * over one of the slave interfaces. This would indicate an open network ring
129 * (i.e. a link has failed somewhere).
130 */
131void hsr_nl_ringerror(struct hsr_priv *hsr_priv, unsigned char addr[ETH_ALEN],
132 enum hsr_dev_idx dev_idx)
133{
134 struct sk_buff *skb;
135 void *msg_head;
136 int res;
137 int ifindex;
138
139 skb = genlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
140 if (!skb)
141 goto fail;
142
143 msg_head = genlmsg_put(skb, 0, 0, &hsr_genl_family, 0, HSR_C_RING_ERROR);
144 if (!msg_head)
145 goto nla_put_failure;
146
147 res = nla_put(skb, HSR_A_NODE_ADDR, ETH_ALEN, addr);
148 if (res < 0)
149 goto nla_put_failure;
150
151 if (hsr_priv->slave[dev_idx])
152 ifindex = hsr_priv->slave[dev_idx]->ifindex;
153 else
154 ifindex = -1;
155 res = nla_put_u32(skb, HSR_A_IFINDEX, ifindex);
156 if (res < 0)
157 goto nla_put_failure;
158
159 genlmsg_end(skb, msg_head);
160 genlmsg_multicast(&hsr_genl_family, skb, 0, 0, GFP_ATOMIC);
161
162 return;
163
164nla_put_failure:
165 kfree_skb(skb);
166
167fail:
168 netdev_warn(hsr_priv->dev, "Could not send HSR ring error message\n");
169}
170
171/* This is called when we haven't heard from the node with MAC address addr for
172 * some time (just before the node is removed from the node table/list).
173 */
174void hsr_nl_nodedown(struct hsr_priv *hsr_priv, unsigned char addr[ETH_ALEN])
175{
176 struct sk_buff *skb;
177 void *msg_head;
178 int res;
179
180 skb = genlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
181 if (!skb)
182 goto fail;
183
184 msg_head = genlmsg_put(skb, 0, 0, &hsr_genl_family, 0, HSR_C_NODE_DOWN);
185 if (!msg_head)
186 goto nla_put_failure;
187
188
189 res = nla_put(skb, HSR_A_NODE_ADDR, ETH_ALEN, addr);
190 if (res < 0)
191 goto nla_put_failure;
192
193 genlmsg_end(skb, msg_head);
194 genlmsg_multicast(&hsr_genl_family, skb, 0, 0, GFP_ATOMIC);
195
196 return;
197
198nla_put_failure:
199 kfree_skb(skb);
200
201fail:
202 netdev_warn(hsr_priv->dev, "Could not send HSR node down\n");
203}
204
205
206/* HSR_C_GET_NODE_STATUS lets userspace query the internal HSR node table
207 * about the status of a specific node in the network, defined by its MAC
208 * address.
209 *
210 * Input: hsr ifindex, node mac address
211 * Output: hsr ifindex, node mac address (copied from request),
212 * age of latest frame from node over slave 1, slave 2 [ms]
213 */
214static int hsr_get_node_status(struct sk_buff *skb_in, struct genl_info *info)
215{
216 /* For receiving */
217 struct nlattr *na;
218 struct net_device *hsr_dev;
219
220 /* For sending */
221 struct sk_buff *skb_out;
222 void *msg_head;
223 struct hsr_priv *hsr_priv;
224 unsigned char hsr_node_addr_b[ETH_ALEN];
225 int hsr_node_if1_age;
226 u16 hsr_node_if1_seq;
227 int hsr_node_if2_age;
228 u16 hsr_node_if2_seq;
229 int addr_b_ifindex;
230 int res;
231
232 if (!info)
233 goto invalid;
234
235 na = info->attrs[HSR_A_IFINDEX];
236 if (!na)
237 goto invalid;
238 na = info->attrs[HSR_A_NODE_ADDR];
239 if (!na)
240 goto invalid;
241
242 hsr_dev = __dev_get_by_index(genl_info_net(info),
243 nla_get_u32(info->attrs[HSR_A_IFINDEX]));
244 if (!hsr_dev)
245 goto invalid;
246 if (!is_hsr_master(hsr_dev))
247 goto invalid;
248
249
250 /* Send reply */
251
252 skb_out = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
253 if (!skb_out) {
254 res = -ENOMEM;
255 goto fail;
256 }
257
258 msg_head = genlmsg_put(skb_out, NETLINK_CB(skb_in).portid,
259 info->snd_seq, &hsr_genl_family, 0,
260 HSR_C_SET_NODE_STATUS);
261 if (!msg_head) {
262 res = -ENOMEM;
263 goto nla_put_failure;
264 }
265
266 res = nla_put_u32(skb_out, HSR_A_IFINDEX, hsr_dev->ifindex);
267 if (res < 0)
268 goto nla_put_failure;
269
270 hsr_priv = netdev_priv(hsr_dev);
271 res = hsr_get_node_data(hsr_priv,
272 (unsigned char *) nla_data(info->attrs[HSR_A_NODE_ADDR]),
273 hsr_node_addr_b,
274 &addr_b_ifindex,
275 &hsr_node_if1_age,
276 &hsr_node_if1_seq,
277 &hsr_node_if2_age,
278 &hsr_node_if2_seq);
279 if (res < 0)
280 goto nla_put_failure;
281
282 res = nla_put(skb_out, HSR_A_NODE_ADDR, ETH_ALEN,
283 nla_data(info->attrs[HSR_A_NODE_ADDR]));
284 if (res < 0)
285 goto nla_put_failure;
286
287 if (addr_b_ifindex > -1) {
288 res = nla_put(skb_out, HSR_A_NODE_ADDR_B, ETH_ALEN,
289 hsr_node_addr_b);
290 if (res < 0)
291 goto nla_put_failure;
292
293 res = nla_put_u32(skb_out, HSR_A_ADDR_B_IFINDEX, addr_b_ifindex);
294 if (res < 0)
295 goto nla_put_failure;
296 }
297
298 res = nla_put_u32(skb_out, HSR_A_IF1_AGE, hsr_node_if1_age);
299 if (res < 0)
300 goto nla_put_failure;
301 res = nla_put_u16(skb_out, HSR_A_IF1_SEQ, hsr_node_if1_seq);
302 if (res < 0)
303 goto nla_put_failure;
304 if (hsr_priv->slave[0])
305 res = nla_put_u32(skb_out, HSR_A_IF1_IFINDEX,
306 hsr_priv->slave[0]->ifindex);
307 if (res < 0)
308 goto nla_put_failure;
309
310 res = nla_put_u32(skb_out, HSR_A_IF2_AGE, hsr_node_if2_age);
311 if (res < 0)
312 goto nla_put_failure;
313 res = nla_put_u16(skb_out, HSR_A_IF2_SEQ, hsr_node_if2_seq);
314 if (res < 0)
315 goto nla_put_failure;
316 if (hsr_priv->slave[1])
317 res = nla_put_u32(skb_out, HSR_A_IF2_IFINDEX,
318 hsr_priv->slave[1]->ifindex);
319
320 genlmsg_end(skb_out, msg_head);
321 genlmsg_unicast(genl_info_net(info), skb_out, info->snd_portid);
322
323 return 0;
324
325invalid:
326 netlink_ack(skb_in, nlmsg_hdr(skb_in), -EINVAL);
327 return 0;
328
329nla_put_failure:
330 kfree_skb(skb_out);
331 /* Fall through */
332
333fail:
334 return res;
335}
336
337/* Get a list of MacAddressA of all nodes known to this node (other than self).
338 */
339static int hsr_get_node_list(struct sk_buff *skb_in, struct genl_info *info)
340{
341 /* For receiving */
342 struct nlattr *na;
343 struct net_device *hsr_dev;
344
345 /* For sending */
346 struct sk_buff *skb_out;
347 void *msg_head;
348 struct hsr_priv *hsr_priv;
349 void *pos;
350 unsigned char addr[ETH_ALEN];
351 int res;
352
353 if (!info)
354 goto invalid;
355
356 na = info->attrs[HSR_A_IFINDEX];
357 if (!na)
358 goto invalid;
359
360 hsr_dev = __dev_get_by_index(genl_info_net(info),
361 nla_get_u32(info->attrs[HSR_A_IFINDEX]));
362 if (!hsr_dev)
363 goto invalid;
364 if (!is_hsr_master(hsr_dev))
365 goto invalid;
366
367
368 /* Send reply */
369
370 skb_out = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
371 if (!skb_out) {
372 res = -ENOMEM;
373 goto fail;
374 }
375
376 msg_head = genlmsg_put(skb_out, NETLINK_CB(skb_in).portid,
377 info->snd_seq, &hsr_genl_family, 0,
378 HSR_C_SET_NODE_LIST);
379 if (!msg_head) {
380 res = -ENOMEM;
381 goto nla_put_failure;
382 }
383
384 res = nla_put_u32(skb_out, HSR_A_IFINDEX, hsr_dev->ifindex);
385 if (res < 0)
386 goto nla_put_failure;
387
388 hsr_priv = netdev_priv(hsr_dev);
389
390 rcu_read_lock();
391 pos = hsr_get_next_node(hsr_priv, NULL, addr);
392 while (pos) {
393 res = nla_put(skb_out, HSR_A_NODE_ADDR, ETH_ALEN, addr);
394 if (res < 0) {
395 rcu_read_unlock();
396 goto nla_put_failure;
397 }
398 pos = hsr_get_next_node(hsr_priv, pos, addr);
399 }
400 rcu_read_unlock();
401
402 genlmsg_end(skb_out, msg_head);
403 genlmsg_unicast(genl_info_net(info), skb_out, info->snd_portid);
404
405 return 0;
406
407invalid:
408 netlink_ack(skb_in, nlmsg_hdr(skb_in), -EINVAL);
409 return 0;
410
411nla_put_failure:
412 kfree_skb(skb_out);
413 /* Fall through */
414
415fail:
416 return res;
417}
418
419
420static const struct genl_ops hsr_ops[] = {
421 {
422 .cmd = HSR_C_GET_NODE_STATUS,
423 .flags = 0,
424 .policy = hsr_genl_policy,
425 .doit = hsr_get_node_status,
426 .dumpit = NULL,
427 },
428 {
429 .cmd = HSR_C_GET_NODE_LIST,
430 .flags = 0,
431 .policy = hsr_genl_policy,
432 .doit = hsr_get_node_list,
433 .dumpit = NULL,
434 },
435};
436
437int __init hsr_netlink_init(void)
438{
439 int rc;
440
441 rc = rtnl_link_register(&hsr_link_ops);
442 if (rc)
443 goto fail_rtnl_link_register;
444
445 rc = genl_register_family_with_ops_groups(&hsr_genl_family, hsr_ops,
446 hsr_mcgrps);
447 if (rc)
448 goto fail_genl_register_family;
449
450 return 0;
451
452fail_genl_register_family:
453 rtnl_link_unregister(&hsr_link_ops);
454fail_rtnl_link_register:
455
456 return rc;
457}
458
459void __exit hsr_netlink_exit(void)
460{
461 genl_unregister_family(&hsr_genl_family);
462 rtnl_link_unregister(&hsr_link_ops);
463}
464
465MODULE_ALIAS_RTNL_LINK("hsr");