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 * This file contains device methods for creating, using and destroying
7 * virtual HSR or PRP devices.
8 */
9
10 #include <linux/netdevice.h>
11 #include <linux/skbuff.h>
12 #include <linux/etherdevice.h>
13 #include <linux/rtnetlink.h>
14 #include <linux/pkt_sched.h>
15 #include "hsr_device.h"
16 #include "hsr_slave.h"
17 #include "hsr_framereg.h"
18 #include "hsr_main.h"
19 #include "hsr_forward.h"
20
is_admin_up(struct net_device * dev)21 static bool is_admin_up(struct net_device *dev)
22 {
23 return dev && (dev->flags & IFF_UP);
24 }
25
is_slave_up(struct net_device * dev)26 static bool is_slave_up(struct net_device *dev)
27 {
28 return dev && is_admin_up(dev) && netif_oper_up(dev);
29 }
30
hsr_set_operstate(struct hsr_port * master,bool has_carrier)31 static void hsr_set_operstate(struct hsr_port *master, bool has_carrier)
32 {
33 struct net_device *dev = master->dev;
34
35 if (!is_admin_up(dev)) {
36 netdev_set_operstate(dev, IF_OPER_DOWN);
37 return;
38 }
39
40 if (has_carrier)
41 netdev_set_operstate(dev, IF_OPER_UP);
42 else
43 netdev_set_operstate(dev, IF_OPER_LOWERLAYERDOWN);
44 }
45
hsr_check_carrier(struct hsr_port * master)46 static bool hsr_check_carrier(struct hsr_port *master)
47 {
48 struct hsr_port *port;
49
50 ASSERT_RTNL();
51
52 hsr_for_each_port(master->hsr, port) {
53 if (port->type != HSR_PT_MASTER && is_slave_up(port->dev)) {
54 netif_carrier_on(master->dev);
55 return true;
56 }
57 }
58
59 netif_carrier_off(master->dev);
60
61 return false;
62 }
63
hsr_check_announce(struct net_device * hsr_dev)64 static void hsr_check_announce(struct net_device *hsr_dev)
65 {
66 struct hsr_priv *hsr;
67
68 hsr = netdev_priv(hsr_dev);
69 if (netif_running(hsr_dev) && netif_oper_up(hsr_dev)) {
70 /* Enable announce timer and start sending supervisory frames */
71 if (!timer_pending(&hsr->announce_timer)) {
72 hsr->announce_count = 0;
73 mod_timer(&hsr->announce_timer, jiffies +
74 msecs_to_jiffies(HSR_ANNOUNCE_INTERVAL));
75 }
76
77 if (hsr->redbox && !timer_pending(&hsr->announce_proxy_timer))
78 mod_timer(&hsr->announce_proxy_timer, jiffies +
79 msecs_to_jiffies(HSR_ANNOUNCE_INTERVAL) / 2);
80 } else {
81 /* Deactivate the announce timer */
82 timer_delete(&hsr->announce_timer);
83 if (hsr->redbox)
84 timer_delete(&hsr->announce_proxy_timer);
85 }
86 }
87
hsr_check_carrier_and_operstate(struct hsr_priv * hsr)88 void hsr_check_carrier_and_operstate(struct hsr_priv *hsr)
89 {
90 struct hsr_port *master;
91 bool has_carrier;
92
93 master = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
94 /* netif_stacked_transfer_operstate() cannot be used here since
95 * it doesn't set IF_OPER_LOWERLAYERDOWN (?)
96 */
97 has_carrier = hsr_check_carrier(master);
98 hsr_set_operstate(master, has_carrier);
99 hsr_check_announce(master->dev);
100 }
101
hsr_get_max_mtu(struct hsr_priv * hsr)102 int hsr_get_max_mtu(struct hsr_priv *hsr)
103 {
104 unsigned int mtu_max;
105 struct hsr_port *port;
106
107 mtu_max = ETH_DATA_LEN;
108 hsr_for_each_port(hsr, port)
109 if (port->type != HSR_PT_MASTER)
110 mtu_max = min(port->dev->mtu, mtu_max);
111
112 if (mtu_max < HSR_HLEN)
113 return 0;
114 return mtu_max - HSR_HLEN;
115 }
116
hsr_dev_change_mtu(struct net_device * dev,int new_mtu)117 static int hsr_dev_change_mtu(struct net_device *dev, int new_mtu)
118 {
119 struct hsr_priv *hsr;
120
121 hsr = netdev_priv(dev);
122
123 if (new_mtu > hsr_get_max_mtu(hsr)) {
124 netdev_info(dev, "A HSR master's MTU cannot be greater than the smallest MTU of its slaves minus the HSR Tag length (%d octets).\n",
125 HSR_HLEN);
126 return -EINVAL;
127 }
128
129 WRITE_ONCE(dev->mtu, new_mtu);
130
131 return 0;
132 }
133
hsr_dev_open(struct net_device * dev)134 static int hsr_dev_open(struct net_device *dev)
135 {
136 struct hsr_priv *hsr;
137 struct hsr_port *port;
138 const char *designation = NULL;
139
140 hsr = netdev_priv(dev);
141
142 hsr_for_each_port(hsr, port) {
143 if (port->type == HSR_PT_MASTER)
144 continue;
145 switch (port->type) {
146 case HSR_PT_SLAVE_A:
147 designation = "Slave A";
148 break;
149 case HSR_PT_SLAVE_B:
150 designation = "Slave B";
151 break;
152 case HSR_PT_INTERLINK:
153 designation = "Interlink";
154 break;
155 default:
156 designation = "Unknown";
157 }
158 if (!is_slave_up(port->dev))
159 netdev_warn(dev, "%s (%s) is not up; please bring it up to get a fully working HSR network\n",
160 designation, port->dev->name);
161 }
162
163 if (!designation)
164 netdev_warn(dev, "No slave devices configured\n");
165
166 return 0;
167 }
168
hsr_dev_close(struct net_device * dev)169 static int hsr_dev_close(struct net_device *dev)
170 {
171 struct hsr_port *port;
172 struct hsr_priv *hsr;
173
174 hsr = netdev_priv(dev);
175 hsr_for_each_port(hsr, port) {
176 if (port->type == HSR_PT_MASTER)
177 continue;
178 switch (port->type) {
179 case HSR_PT_SLAVE_A:
180 case HSR_PT_SLAVE_B:
181 dev_uc_unsync(port->dev, dev);
182 dev_mc_unsync(port->dev, dev);
183 break;
184 default:
185 break;
186 }
187 }
188
189 return 0;
190 }
191
hsr_features_recompute(struct hsr_priv * hsr,netdev_features_t features)192 static netdev_features_t hsr_features_recompute(struct hsr_priv *hsr,
193 netdev_features_t features)
194 {
195 netdev_features_t mask;
196 struct hsr_port *port;
197
198 mask = features;
199
200 /* Mask out all features that, if supported by one device, should be
201 * enabled for all devices (see NETIF_F_ONE_FOR_ALL).
202 *
203 * Anything that's off in mask will not be enabled - so only things
204 * that were in features originally, and also is in NETIF_F_ONE_FOR_ALL,
205 * may become enabled.
206 */
207 features &= ~NETIF_F_ONE_FOR_ALL;
208 hsr_for_each_port(hsr, port)
209 features = netdev_increment_features(features,
210 port->dev->features,
211 mask);
212
213 return features;
214 }
215
hsr_fix_features(struct net_device * dev,netdev_features_t features)216 static netdev_features_t hsr_fix_features(struct net_device *dev,
217 netdev_features_t features)
218 {
219 struct hsr_priv *hsr = netdev_priv(dev);
220
221 return hsr_features_recompute(hsr, features);
222 }
223
hsr_dev_xmit(struct sk_buff * skb,struct net_device * dev)224 static netdev_tx_t hsr_dev_xmit(struct sk_buff *skb, struct net_device *dev)
225 {
226 struct hsr_priv *hsr = netdev_priv(dev);
227 struct hsr_port *master;
228
229 master = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
230 if (master) {
231 skb->dev = master->dev;
232 skb_reset_mac_header(skb);
233 skb_reset_mac_len(skb);
234 spin_lock_bh(&hsr->seqnr_lock);
235 hsr_forward_skb(skb, master);
236 spin_unlock_bh(&hsr->seqnr_lock);
237 } else {
238 dev_core_stats_tx_dropped_inc(dev);
239 dev_kfree_skb_any(skb);
240 }
241 return NETDEV_TX_OK;
242 }
243
244 static const struct header_ops hsr_header_ops = {
245 .create = eth_header,
246 .parse = eth_header_parse,
247 };
248
hsr_init_skb(struct hsr_port * master)249 static struct sk_buff *hsr_init_skb(struct hsr_port *master)
250 {
251 struct hsr_priv *hsr = master->hsr;
252 struct sk_buff *skb;
253 int hlen, tlen;
254
255 hlen = LL_RESERVED_SPACE(master->dev);
256 tlen = master->dev->needed_tailroom;
257 /* skb size is same for PRP/HSR frames, only difference
258 * being, for PRP it is a trailer and for HSR it is a
259 * header
260 */
261 skb = dev_alloc_skb(sizeof(struct hsr_sup_tag) +
262 sizeof(struct hsr_sup_payload) + hlen + tlen);
263
264 if (!skb)
265 return skb;
266
267 skb_reserve(skb, hlen);
268 skb->dev = master->dev;
269 skb->priority = TC_PRIO_CONTROL;
270
271 if (dev_hard_header(skb, skb->dev, ETH_P_PRP,
272 hsr->sup_multicast_addr,
273 skb->dev->dev_addr, skb->len) <= 0)
274 goto out;
275
276 skb_reset_mac_header(skb);
277 skb_reset_mac_len(skb);
278 skb_reset_network_header(skb);
279 skb_reset_transport_header(skb);
280
281 return skb;
282 out:
283 kfree_skb(skb);
284
285 return NULL;
286 }
287
send_hsr_supervision_frame(struct hsr_port * port,unsigned long * interval,const unsigned char * addr)288 static void send_hsr_supervision_frame(struct hsr_port *port,
289 unsigned long *interval,
290 const unsigned char *addr)
291 {
292 struct hsr_priv *hsr = port->hsr;
293 __u8 type = HSR_TLV_LIFE_CHECK;
294 struct hsr_sup_payload *hsr_sp;
295 struct hsr_sup_tlv *hsr_stlv;
296 struct hsr_sup_tag *hsr_stag;
297 struct sk_buff *skb;
298
299 *interval = msecs_to_jiffies(HSR_LIFE_CHECK_INTERVAL);
300 if (hsr->announce_count < 3 && hsr->prot_version == 0) {
301 type = HSR_TLV_ANNOUNCE;
302 *interval = msecs_to_jiffies(HSR_ANNOUNCE_INTERVAL);
303 hsr->announce_count++;
304 }
305
306 skb = hsr_init_skb(port);
307 if (!skb) {
308 netdev_warn_once(port->dev, "HSR: Could not send supervision frame\n");
309 return;
310 }
311
312 hsr_stag = skb_put(skb, sizeof(struct hsr_sup_tag));
313 set_hsr_stag_path(hsr_stag, (hsr->prot_version ? 0x0 : 0xf));
314 set_hsr_stag_HSR_ver(hsr_stag, hsr->prot_version);
315
316 /* From HSRv1 on we have separate supervision sequence numbers. */
317 spin_lock_bh(&hsr->seqnr_lock);
318 if (hsr->prot_version > 0) {
319 hsr_stag->sequence_nr = htons(hsr->sup_sequence_nr);
320 hsr->sup_sequence_nr++;
321 } else {
322 hsr_stag->sequence_nr = htons(hsr->sequence_nr);
323 hsr->sequence_nr++;
324 }
325
326 hsr_stag->tlv.HSR_TLV_type = type;
327 /* TODO: Why 12 in HSRv0? */
328 hsr_stag->tlv.HSR_TLV_length = hsr->prot_version ?
329 sizeof(struct hsr_sup_payload) : 12;
330
331 /* Payload: MacAddressA / SAN MAC from ProxyNodeTable */
332 hsr_sp = skb_put(skb, sizeof(struct hsr_sup_payload));
333 ether_addr_copy(hsr_sp->macaddress_A, addr);
334
335 if (hsr->redbox &&
336 hsr_is_node_in_db(&hsr->proxy_node_db, addr)) {
337 hsr_stlv = skb_put(skb, sizeof(struct hsr_sup_tlv));
338 hsr_stlv->HSR_TLV_type = PRP_TLV_REDBOX_MAC;
339 hsr_stlv->HSR_TLV_length = sizeof(struct hsr_sup_payload);
340
341 /* Payload: MacAddressRedBox */
342 hsr_sp = skb_put(skb, sizeof(struct hsr_sup_payload));
343 ether_addr_copy(hsr_sp->macaddress_A, hsr->macaddress_redbox);
344 }
345
346 if (skb_put_padto(skb, ETH_ZLEN)) {
347 spin_unlock_bh(&hsr->seqnr_lock);
348 return;
349 }
350
351 hsr_forward_skb(skb, port);
352 spin_unlock_bh(&hsr->seqnr_lock);
353 return;
354 }
355
send_prp_supervision_frame(struct hsr_port * master,unsigned long * interval,const unsigned char * addr)356 static void send_prp_supervision_frame(struct hsr_port *master,
357 unsigned long *interval,
358 const unsigned char *addr)
359 {
360 struct hsr_priv *hsr = master->hsr;
361 struct hsr_sup_payload *hsr_sp;
362 struct hsr_sup_tag *hsr_stag;
363 struct sk_buff *skb;
364
365 skb = hsr_init_skb(master);
366 if (!skb) {
367 netdev_warn_once(master->dev, "PRP: Could not send supervision frame\n");
368 return;
369 }
370
371 *interval = msecs_to_jiffies(HSR_LIFE_CHECK_INTERVAL);
372 hsr_stag = skb_put(skb, sizeof(struct hsr_sup_tag));
373 set_hsr_stag_path(hsr_stag, (hsr->prot_version ? 0x0 : 0xf));
374 set_hsr_stag_HSR_ver(hsr_stag, (hsr->prot_version ? 1 : 0));
375
376 /* From HSRv1 on we have separate supervision sequence numbers. */
377 spin_lock_bh(&hsr->seqnr_lock);
378 hsr_stag->sequence_nr = htons(hsr->sup_sequence_nr);
379 hsr->sup_sequence_nr++;
380 hsr_stag->tlv.HSR_TLV_type = PRP_TLV_LIFE_CHECK_DD;
381 hsr_stag->tlv.HSR_TLV_length = sizeof(struct hsr_sup_payload);
382
383 /* Payload: MacAddressA */
384 hsr_sp = skb_put(skb, sizeof(struct hsr_sup_payload));
385 ether_addr_copy(hsr_sp->macaddress_A, master->dev->dev_addr);
386
387 if (skb_put_padto(skb, ETH_ZLEN)) {
388 spin_unlock_bh(&hsr->seqnr_lock);
389 return;
390 }
391
392 hsr_forward_skb(skb, master);
393 spin_unlock_bh(&hsr->seqnr_lock);
394 }
395
396 /* Announce (supervision frame) timer function
397 */
hsr_announce(struct timer_list * t)398 static void hsr_announce(struct timer_list *t)
399 {
400 struct hsr_priv *hsr;
401 struct hsr_port *master;
402 unsigned long interval;
403
404 hsr = from_timer(hsr, t, announce_timer);
405
406 rcu_read_lock();
407 master = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
408 hsr->proto_ops->send_sv_frame(master, &interval, master->dev->dev_addr);
409
410 if (is_admin_up(master->dev))
411 mod_timer(&hsr->announce_timer, jiffies + interval);
412
413 rcu_read_unlock();
414 }
415
416 /* Announce (supervision frame) timer function for RedBox
417 */
hsr_proxy_announce(struct timer_list * t)418 static void hsr_proxy_announce(struct timer_list *t)
419 {
420 struct hsr_priv *hsr = from_timer(hsr, t, announce_proxy_timer);
421 struct hsr_port *interlink;
422 unsigned long interval = 0;
423 struct hsr_node *node;
424
425 rcu_read_lock();
426 /* RedBOX sends supervisory frames to HSR network with MAC addresses
427 * of SAN nodes stored in ProxyNodeTable.
428 */
429 interlink = hsr_port_get_hsr(hsr, HSR_PT_INTERLINK);
430 if (!interlink)
431 goto done;
432
433 list_for_each_entry_rcu(node, &hsr->proxy_node_db, mac_list) {
434 if (hsr_addr_is_redbox(hsr, node->macaddress_A))
435 continue;
436 hsr->proto_ops->send_sv_frame(interlink, &interval,
437 node->macaddress_A);
438 }
439
440 if (is_admin_up(interlink->dev)) {
441 if (!interval)
442 interval = msecs_to_jiffies(HSR_ANNOUNCE_INTERVAL);
443
444 mod_timer(&hsr->announce_proxy_timer, jiffies + interval);
445 }
446
447 done:
448 rcu_read_unlock();
449 }
450
hsr_del_ports(struct hsr_priv * hsr)451 void hsr_del_ports(struct hsr_priv *hsr)
452 {
453 struct hsr_port *port;
454
455 port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_A);
456 if (port)
457 hsr_del_port(port);
458
459 port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_B);
460 if (port)
461 hsr_del_port(port);
462
463 port = hsr_port_get_hsr(hsr, HSR_PT_INTERLINK);
464 if (port)
465 hsr_del_port(port);
466
467 port = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
468 if (port)
469 hsr_del_port(port);
470 }
471
hsr_set_rx_mode(struct net_device * dev)472 static void hsr_set_rx_mode(struct net_device *dev)
473 {
474 struct hsr_port *port;
475 struct hsr_priv *hsr;
476
477 hsr = netdev_priv(dev);
478
479 hsr_for_each_port(hsr, port) {
480 if (port->type == HSR_PT_MASTER)
481 continue;
482 switch (port->type) {
483 case HSR_PT_SLAVE_A:
484 case HSR_PT_SLAVE_B:
485 dev_mc_sync_multiple(port->dev, dev);
486 dev_uc_sync_multiple(port->dev, dev);
487 break;
488 default:
489 break;
490 }
491 }
492 }
493
hsr_change_rx_flags(struct net_device * dev,int change)494 static void hsr_change_rx_flags(struct net_device *dev, int change)
495 {
496 struct hsr_port *port;
497 struct hsr_priv *hsr;
498
499 hsr = netdev_priv(dev);
500
501 hsr_for_each_port(hsr, port) {
502 if (port->type == HSR_PT_MASTER)
503 continue;
504 switch (port->type) {
505 case HSR_PT_SLAVE_A:
506 case HSR_PT_SLAVE_B:
507 if (change & IFF_ALLMULTI)
508 dev_set_allmulti(port->dev,
509 dev->flags &
510 IFF_ALLMULTI ? 1 : -1);
511 break;
512 default:
513 break;
514 }
515 }
516 }
517
518 static const struct net_device_ops hsr_device_ops = {
519 .ndo_change_mtu = hsr_dev_change_mtu,
520 .ndo_open = hsr_dev_open,
521 .ndo_stop = hsr_dev_close,
522 .ndo_start_xmit = hsr_dev_xmit,
523 .ndo_change_rx_flags = hsr_change_rx_flags,
524 .ndo_fix_features = hsr_fix_features,
525 .ndo_set_rx_mode = hsr_set_rx_mode,
526 };
527
528 static const struct device_type hsr_type = {
529 .name = "hsr",
530 };
531
532 static struct hsr_proto_ops hsr_ops = {
533 .send_sv_frame = send_hsr_supervision_frame,
534 .create_tagged_frame = hsr_create_tagged_frame,
535 .get_untagged_frame = hsr_get_untagged_frame,
536 .drop_frame = hsr_drop_frame,
537 .fill_frame_info = hsr_fill_frame_info,
538 .invalid_dan_ingress_frame = hsr_invalid_dan_ingress_frame,
539 };
540
541 static struct hsr_proto_ops prp_ops = {
542 .send_sv_frame = send_prp_supervision_frame,
543 .create_tagged_frame = prp_create_tagged_frame,
544 .get_untagged_frame = prp_get_untagged_frame,
545 .drop_frame = prp_drop_frame,
546 .fill_frame_info = prp_fill_frame_info,
547 .handle_san_frame = prp_handle_san_frame,
548 .update_san_info = prp_update_san_info,
549 };
550
hsr_dev_setup(struct net_device * dev)551 void hsr_dev_setup(struct net_device *dev)
552 {
553 eth_hw_addr_random(dev);
554
555 ether_setup(dev);
556 dev->min_mtu = 0;
557 dev->header_ops = &hsr_header_ops;
558 dev->netdev_ops = &hsr_device_ops;
559 SET_NETDEV_DEVTYPE(dev, &hsr_type);
560 dev->priv_flags |= IFF_NO_QUEUE | IFF_DISABLE_NETPOLL;
561 /* Prevent recursive tx locking */
562 dev->lltx = true;
563 /* Not sure about this. Taken from bridge code. netdevice.h says
564 * it means "Does not change network namespaces".
565 */
566 dev->netns_local = true;
567
568 dev->needs_free_netdev = true;
569
570 dev->hw_features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA |
571 NETIF_F_GSO_MASK | NETIF_F_HW_CSUM |
572 NETIF_F_HW_VLAN_CTAG_TX;
573
574 dev->features = dev->hw_features;
575
576 /* VLAN on top of HSR needs testing and probably some work on
577 * hsr_header_create() etc.
578 */
579 dev->features |= NETIF_F_VLAN_CHALLENGED;
580 }
581
582 /* Return true if dev is a HSR master; return false otherwise.
583 */
is_hsr_master(struct net_device * dev)584 bool is_hsr_master(struct net_device *dev)
585 {
586 return (dev->netdev_ops->ndo_start_xmit == hsr_dev_xmit);
587 }
588 EXPORT_SYMBOL(is_hsr_master);
589
590 /* Default multicast address for HSR Supervision frames */
591 static const unsigned char def_multicast_addr[ETH_ALEN] __aligned(2) = {
592 0x01, 0x15, 0x4e, 0x00, 0x01, 0x00
593 };
594
hsr_dev_finalize(struct net_device * hsr_dev,struct net_device * slave[2],struct net_device * interlink,unsigned char multicast_spec,u8 protocol_version,struct netlink_ext_ack * extack)595 int hsr_dev_finalize(struct net_device *hsr_dev, struct net_device *slave[2],
596 struct net_device *interlink, unsigned char multicast_spec,
597 u8 protocol_version, struct netlink_ext_ack *extack)
598 {
599 bool unregister = false;
600 struct hsr_priv *hsr;
601 int res;
602
603 hsr = netdev_priv(hsr_dev);
604 INIT_LIST_HEAD(&hsr->ports);
605 INIT_LIST_HEAD(&hsr->node_db);
606 INIT_LIST_HEAD(&hsr->proxy_node_db);
607 spin_lock_init(&hsr->list_lock);
608
609 eth_hw_addr_set(hsr_dev, slave[0]->dev_addr);
610
611 /* initialize protocol specific functions */
612 if (protocol_version == PRP_V1) {
613 /* For PRP, lan_id has most significant 3 bits holding
614 * the net_id of PRP_LAN_ID
615 */
616 hsr->net_id = PRP_LAN_ID << 1;
617 hsr->proto_ops = &prp_ops;
618 } else {
619 hsr->proto_ops = &hsr_ops;
620 }
621
622 /* Make sure we recognize frames from ourselves in hsr_rcv() */
623 res = hsr_create_self_node(hsr, hsr_dev->dev_addr,
624 slave[1]->dev_addr);
625 if (res < 0)
626 return res;
627
628 spin_lock_init(&hsr->seqnr_lock);
629 /* Overflow soon to find bugs easier: */
630 hsr->sequence_nr = HSR_SEQNR_START;
631 hsr->sup_sequence_nr = HSR_SUP_SEQNR_START;
632
633 timer_setup(&hsr->announce_timer, hsr_announce, 0);
634 timer_setup(&hsr->prune_timer, hsr_prune_nodes, 0);
635 timer_setup(&hsr->prune_proxy_timer, hsr_prune_proxy_nodes, 0);
636 timer_setup(&hsr->announce_proxy_timer, hsr_proxy_announce, 0);
637
638 ether_addr_copy(hsr->sup_multicast_addr, def_multicast_addr);
639 hsr->sup_multicast_addr[ETH_ALEN - 1] = multicast_spec;
640
641 hsr->prot_version = protocol_version;
642
643 /* Make sure the 1st call to netif_carrier_on() gets through */
644 netif_carrier_off(hsr_dev);
645
646 res = hsr_add_port(hsr, hsr_dev, HSR_PT_MASTER, extack);
647 if (res)
648 goto err_add_master;
649
650 /* HSR forwarding offload supported in lower device? */
651 if ((slave[0]->features & NETIF_F_HW_HSR_FWD) &&
652 (slave[1]->features & NETIF_F_HW_HSR_FWD))
653 hsr->fwd_offloaded = true;
654
655 res = register_netdevice(hsr_dev);
656 if (res)
657 goto err_unregister;
658
659 unregister = true;
660
661 res = hsr_add_port(hsr, slave[0], HSR_PT_SLAVE_A, extack);
662 if (res)
663 goto err_unregister;
664
665 res = hsr_add_port(hsr, slave[1], HSR_PT_SLAVE_B, extack);
666 if (res)
667 goto err_unregister;
668
669 if (interlink) {
670 res = hsr_add_port(hsr, interlink, HSR_PT_INTERLINK, extack);
671 if (res)
672 goto err_unregister;
673
674 hsr->redbox = true;
675 ether_addr_copy(hsr->macaddress_redbox, interlink->dev_addr);
676 mod_timer(&hsr->prune_proxy_timer,
677 jiffies + msecs_to_jiffies(PRUNE_PROXY_PERIOD));
678 }
679
680 hsr_debugfs_init(hsr, hsr_dev);
681 mod_timer(&hsr->prune_timer, jiffies + msecs_to_jiffies(PRUNE_PERIOD));
682
683 return 0;
684
685 err_unregister:
686 hsr_del_ports(hsr);
687 err_add_master:
688 hsr_del_self_node(hsr);
689
690 if (unregister)
691 unregister_netdevice(hsr_dev);
692 return res;
693 }
694