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