]> Git Repo - J-linux.git/blob - net/hsr/hsr_device.c
Merge tag 'vfs-6.13-rc7.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
[J-linux.git] / net / hsr / hsr_device.c
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, [email protected]
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
21 static bool is_admin_up(struct net_device *dev)
22 {
23         return dev && (dev->flags & IFF_UP);
24 }
25
26 static bool is_slave_up(struct net_device *dev)
27 {
28         return dev && is_admin_up(dev) && netif_oper_up(dev);
29 }
30
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
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
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
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
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
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
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
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
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
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
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
249 static struct sk_buff *hsr_init_skb(struct hsr_port *master, int extra)
250 {
251         struct hsr_priv *hsr = master->hsr;
252         struct sk_buff *skb;
253         int hlen, tlen;
254         int len;
255
256         hlen = LL_RESERVED_SPACE(master->dev);
257         tlen = master->dev->needed_tailroom;
258         len = sizeof(struct hsr_sup_tag) + sizeof(struct hsr_sup_payload);
259         /* skb size is same for PRP/HSR frames, only difference
260          * being, for PRP it is a trailer and for HSR it is a
261          * header.
262          * RedBox might use @extra more bytes.
263          */
264         skb = dev_alloc_skb(len + extra + hlen + tlen);
265
266         if (!skb)
267                 return skb;
268
269         skb_reserve(skb, hlen);
270         skb->dev = master->dev;
271         skb->priority = TC_PRIO_CONTROL;
272
273         skb_reset_network_header(skb);
274         skb_reset_transport_header(skb);
275         if (dev_hard_header(skb, skb->dev, ETH_P_PRP,
276                             hsr->sup_multicast_addr,
277                             skb->dev->dev_addr, skb->len) <= 0)
278                 goto out;
279
280         skb_reset_mac_header(skb);
281         skb_reset_mac_len(skb);
282
283         return skb;
284 out:
285         kfree_skb(skb);
286
287         return NULL;
288 }
289
290 static void send_hsr_supervision_frame(struct hsr_port *port,
291                                        unsigned long *interval,
292                                        const unsigned char *addr)
293 {
294         struct hsr_priv *hsr = port->hsr;
295         __u8 type = HSR_TLV_LIFE_CHECK;
296         struct hsr_sup_payload *hsr_sp;
297         struct hsr_sup_tlv *hsr_stlv;
298         struct hsr_sup_tag *hsr_stag;
299         struct sk_buff *skb;
300         int extra = 0;
301
302         *interval = msecs_to_jiffies(HSR_LIFE_CHECK_INTERVAL);
303         if (hsr->announce_count < 3 && hsr->prot_version == 0) {
304                 type = HSR_TLV_ANNOUNCE;
305                 *interval = msecs_to_jiffies(HSR_ANNOUNCE_INTERVAL);
306                 hsr->announce_count++;
307         }
308
309         if (hsr->redbox)
310                 extra = sizeof(struct hsr_sup_tlv) +
311                         sizeof(struct hsr_sup_payload);
312
313         skb = hsr_init_skb(port, extra);
314         if (!skb) {
315                 netdev_warn_once(port->dev, "HSR: Could not send supervision frame\n");
316                 return;
317         }
318
319         hsr_stag = skb_put(skb, sizeof(struct hsr_sup_tag));
320         set_hsr_stag_path(hsr_stag, (hsr->prot_version ? 0x0 : 0xf));
321         set_hsr_stag_HSR_ver(hsr_stag, hsr->prot_version);
322
323         /* From HSRv1 on we have separate supervision sequence numbers. */
324         spin_lock_bh(&hsr->seqnr_lock);
325         if (hsr->prot_version > 0) {
326                 hsr_stag->sequence_nr = htons(hsr->sup_sequence_nr);
327                 hsr->sup_sequence_nr++;
328         } else {
329                 hsr_stag->sequence_nr = htons(hsr->sequence_nr);
330                 hsr->sequence_nr++;
331         }
332
333         hsr_stag->tlv.HSR_TLV_type = type;
334         /* TODO: Why 12 in HSRv0? */
335         hsr_stag->tlv.HSR_TLV_length = hsr->prot_version ?
336                                 sizeof(struct hsr_sup_payload) : 12;
337
338         /* Payload: MacAddressA / SAN MAC from ProxyNodeTable */
339         hsr_sp = skb_put(skb, sizeof(struct hsr_sup_payload));
340         ether_addr_copy(hsr_sp->macaddress_A, addr);
341
342         if (hsr->redbox &&
343             hsr_is_node_in_db(&hsr->proxy_node_db, addr)) {
344                 hsr_stlv = skb_put(skb, sizeof(struct hsr_sup_tlv));
345                 hsr_stlv->HSR_TLV_type = PRP_TLV_REDBOX_MAC;
346                 hsr_stlv->HSR_TLV_length = sizeof(struct hsr_sup_payload);
347
348                 /* Payload: MacAddressRedBox */
349                 hsr_sp = skb_put(skb, sizeof(struct hsr_sup_payload));
350                 ether_addr_copy(hsr_sp->macaddress_A, hsr->macaddress_redbox);
351         }
352
353         if (skb_put_padto(skb, ETH_ZLEN)) {
354                 spin_unlock_bh(&hsr->seqnr_lock);
355                 return;
356         }
357
358         hsr_forward_skb(skb, port);
359         spin_unlock_bh(&hsr->seqnr_lock);
360         return;
361 }
362
363 static void send_prp_supervision_frame(struct hsr_port *master,
364                                        unsigned long *interval,
365                                        const unsigned char *addr)
366 {
367         struct hsr_priv *hsr = master->hsr;
368         struct hsr_sup_payload *hsr_sp;
369         struct hsr_sup_tag *hsr_stag;
370         struct sk_buff *skb;
371
372         skb = hsr_init_skb(master, 0);
373         if (!skb) {
374                 netdev_warn_once(master->dev, "PRP: Could not send supervision frame\n");
375                 return;
376         }
377
378         *interval = msecs_to_jiffies(HSR_LIFE_CHECK_INTERVAL);
379         hsr_stag = skb_put(skb, sizeof(struct hsr_sup_tag));
380         set_hsr_stag_path(hsr_stag, (hsr->prot_version ? 0x0 : 0xf));
381         set_hsr_stag_HSR_ver(hsr_stag, (hsr->prot_version ? 1 : 0));
382
383         /* From HSRv1 on we have separate supervision sequence numbers. */
384         spin_lock_bh(&hsr->seqnr_lock);
385         hsr_stag->sequence_nr = htons(hsr->sup_sequence_nr);
386         hsr->sup_sequence_nr++;
387         hsr_stag->tlv.HSR_TLV_type = PRP_TLV_LIFE_CHECK_DD;
388         hsr_stag->tlv.HSR_TLV_length = sizeof(struct hsr_sup_payload);
389
390         /* Payload: MacAddressA */
391         hsr_sp = skb_put(skb, sizeof(struct hsr_sup_payload));
392         ether_addr_copy(hsr_sp->macaddress_A, master->dev->dev_addr);
393
394         if (skb_put_padto(skb, ETH_ZLEN)) {
395                 spin_unlock_bh(&hsr->seqnr_lock);
396                 return;
397         }
398
399         hsr_forward_skb(skb, master);
400         spin_unlock_bh(&hsr->seqnr_lock);
401 }
402
403 /* Announce (supervision frame) timer function
404  */
405 static void hsr_announce(struct timer_list *t)
406 {
407         struct hsr_priv *hsr;
408         struct hsr_port *master;
409         unsigned long interval;
410
411         hsr = from_timer(hsr, t, announce_timer);
412
413         rcu_read_lock();
414         master = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
415         hsr->proto_ops->send_sv_frame(master, &interval, master->dev->dev_addr);
416
417         if (is_admin_up(master->dev))
418                 mod_timer(&hsr->announce_timer, jiffies + interval);
419
420         rcu_read_unlock();
421 }
422
423 /* Announce (supervision frame) timer function for RedBox
424  */
425 static void hsr_proxy_announce(struct timer_list *t)
426 {
427         struct hsr_priv *hsr = from_timer(hsr, t, announce_proxy_timer);
428         struct hsr_port *interlink;
429         unsigned long interval = 0;
430         struct hsr_node *node;
431
432         rcu_read_lock();
433         /* RedBOX sends supervisory frames to HSR network with MAC addresses
434          * of SAN nodes stored in ProxyNodeTable.
435          */
436         interlink = hsr_port_get_hsr(hsr, HSR_PT_INTERLINK);
437         if (!interlink)
438                 goto done;
439
440         list_for_each_entry_rcu(node, &hsr->proxy_node_db, mac_list) {
441                 if (hsr_addr_is_redbox(hsr, node->macaddress_A))
442                         continue;
443                 hsr->proto_ops->send_sv_frame(interlink, &interval,
444                                               node->macaddress_A);
445         }
446
447         if (is_admin_up(interlink->dev)) {
448                 if (!interval)
449                         interval = msecs_to_jiffies(HSR_ANNOUNCE_INTERVAL);
450
451                 mod_timer(&hsr->announce_proxy_timer, jiffies + interval);
452         }
453
454 done:
455         rcu_read_unlock();
456 }
457
458 void hsr_del_ports(struct hsr_priv *hsr)
459 {
460         struct hsr_port *port;
461
462         port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_A);
463         if (port)
464                 hsr_del_port(port);
465
466         port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_B);
467         if (port)
468                 hsr_del_port(port);
469
470         port = hsr_port_get_hsr(hsr, HSR_PT_INTERLINK);
471         if (port)
472                 hsr_del_port(port);
473
474         port = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
475         if (port)
476                 hsr_del_port(port);
477 }
478
479 static void hsr_set_rx_mode(struct net_device *dev)
480 {
481         struct hsr_port *port;
482         struct hsr_priv *hsr;
483
484         hsr = netdev_priv(dev);
485
486         hsr_for_each_port(hsr, port) {
487                 if (port->type == HSR_PT_MASTER)
488                         continue;
489                 switch (port->type) {
490                 case HSR_PT_SLAVE_A:
491                 case HSR_PT_SLAVE_B:
492                         dev_mc_sync_multiple(port->dev, dev);
493                         dev_uc_sync_multiple(port->dev, dev);
494                         break;
495                 default:
496                         break;
497                 }
498         }
499 }
500
501 static void hsr_change_rx_flags(struct net_device *dev, int change)
502 {
503         struct hsr_port *port;
504         struct hsr_priv *hsr;
505
506         hsr = netdev_priv(dev);
507
508         hsr_for_each_port(hsr, port) {
509                 if (port->type == HSR_PT_MASTER)
510                         continue;
511                 switch (port->type) {
512                 case HSR_PT_SLAVE_A:
513                 case HSR_PT_SLAVE_B:
514                         if (change & IFF_ALLMULTI)
515                                 dev_set_allmulti(port->dev,
516                                                  dev->flags &
517                                                  IFF_ALLMULTI ? 1 : -1);
518                         break;
519                 default:
520                         break;
521                 }
522         }
523 }
524
525 static int hsr_ndo_vlan_rx_add_vid(struct net_device *dev,
526                                    __be16 proto, u16 vid)
527 {
528         bool is_slave_a_added = false;
529         bool is_slave_b_added = false;
530         struct hsr_port *port;
531         struct hsr_priv *hsr;
532         int ret = 0;
533
534         hsr = netdev_priv(dev);
535
536         hsr_for_each_port(hsr, port) {
537                 if (port->type == HSR_PT_MASTER ||
538                     port->type == HSR_PT_INTERLINK)
539                         continue;
540
541                 ret = vlan_vid_add(port->dev, proto, vid);
542                 switch (port->type) {
543                 case HSR_PT_SLAVE_A:
544                         if (ret) {
545                                 /* clean up Slave-B */
546                                 netdev_err(dev, "add vid failed for Slave-A\n");
547                                 if (is_slave_b_added)
548                                         vlan_vid_del(port->dev, proto, vid);
549                                 return ret;
550                         }
551
552                         is_slave_a_added = true;
553                         break;
554
555                 case HSR_PT_SLAVE_B:
556                         if (ret) {
557                                 /* clean up Slave-A */
558                                 netdev_err(dev, "add vid failed for Slave-B\n");
559                                 if (is_slave_a_added)
560                                         vlan_vid_del(port->dev, proto, vid);
561                                 return ret;
562                         }
563
564                         is_slave_b_added = true;
565                         break;
566                 default:
567                         break;
568                 }
569         }
570
571         return 0;
572 }
573
574 static int hsr_ndo_vlan_rx_kill_vid(struct net_device *dev,
575                                     __be16 proto, u16 vid)
576 {
577         struct hsr_port *port;
578         struct hsr_priv *hsr;
579
580         hsr = netdev_priv(dev);
581
582         hsr_for_each_port(hsr, port) {
583                 switch (port->type) {
584                 case HSR_PT_SLAVE_A:
585                 case HSR_PT_SLAVE_B:
586                         vlan_vid_del(port->dev, proto, vid);
587                         break;
588                 default:
589                         break;
590                 }
591         }
592
593         return 0;
594 }
595
596 static const struct net_device_ops hsr_device_ops = {
597         .ndo_change_mtu = hsr_dev_change_mtu,
598         .ndo_open = hsr_dev_open,
599         .ndo_stop = hsr_dev_close,
600         .ndo_start_xmit = hsr_dev_xmit,
601         .ndo_change_rx_flags = hsr_change_rx_flags,
602         .ndo_fix_features = hsr_fix_features,
603         .ndo_set_rx_mode = hsr_set_rx_mode,
604         .ndo_vlan_rx_add_vid = hsr_ndo_vlan_rx_add_vid,
605         .ndo_vlan_rx_kill_vid = hsr_ndo_vlan_rx_kill_vid,
606 };
607
608 static const struct device_type hsr_type = {
609         .name = "hsr",
610 };
611
612 static struct hsr_proto_ops hsr_ops = {
613         .send_sv_frame = send_hsr_supervision_frame,
614         .create_tagged_frame = hsr_create_tagged_frame,
615         .get_untagged_frame = hsr_get_untagged_frame,
616         .drop_frame = hsr_drop_frame,
617         .fill_frame_info = hsr_fill_frame_info,
618         .invalid_dan_ingress_frame = hsr_invalid_dan_ingress_frame,
619 };
620
621 static struct hsr_proto_ops prp_ops = {
622         .send_sv_frame = send_prp_supervision_frame,
623         .create_tagged_frame = prp_create_tagged_frame,
624         .get_untagged_frame = prp_get_untagged_frame,
625         .drop_frame = prp_drop_frame,
626         .fill_frame_info = prp_fill_frame_info,
627         .handle_san_frame = prp_handle_san_frame,
628         .update_san_info = prp_update_san_info,
629 };
630
631 void hsr_dev_setup(struct net_device *dev)
632 {
633         eth_hw_addr_random(dev);
634
635         ether_setup(dev);
636         dev->min_mtu = 0;
637         dev->header_ops = &hsr_header_ops;
638         dev->netdev_ops = &hsr_device_ops;
639         SET_NETDEV_DEVTYPE(dev, &hsr_type);
640         dev->priv_flags |= IFF_NO_QUEUE | IFF_DISABLE_NETPOLL;
641         /* Prevent recursive tx locking */
642         dev->lltx = true;
643         /* Not sure about this. Taken from bridge code. netdevice.h says
644          * it means "Does not change network namespaces".
645          */
646         dev->netns_local = true;
647
648         dev->needs_free_netdev = true;
649
650         dev->hw_features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA |
651                            NETIF_F_GSO_MASK | NETIF_F_HW_CSUM |
652                            NETIF_F_HW_VLAN_CTAG_TX |
653                            NETIF_F_HW_VLAN_CTAG_FILTER;
654
655         dev->features = dev->hw_features;
656 }
657
658 /* Return true if dev is a HSR master; return false otherwise.
659  */
660 bool is_hsr_master(struct net_device *dev)
661 {
662         return (dev->netdev_ops->ndo_start_xmit == hsr_dev_xmit);
663 }
664 EXPORT_SYMBOL(is_hsr_master);
665
666 /* Default multicast address for HSR Supervision frames */
667 static const unsigned char def_multicast_addr[ETH_ALEN] __aligned(2) = {
668         0x01, 0x15, 0x4e, 0x00, 0x01, 0x00
669 };
670
671 int hsr_dev_finalize(struct net_device *hsr_dev, struct net_device *slave[2],
672                      struct net_device *interlink, unsigned char multicast_spec,
673                      u8 protocol_version, struct netlink_ext_ack *extack)
674 {
675         bool unregister = false;
676         struct hsr_priv *hsr;
677         int res;
678
679         hsr = netdev_priv(hsr_dev);
680         INIT_LIST_HEAD(&hsr->ports);
681         INIT_LIST_HEAD(&hsr->node_db);
682         INIT_LIST_HEAD(&hsr->proxy_node_db);
683         spin_lock_init(&hsr->list_lock);
684
685         eth_hw_addr_set(hsr_dev, slave[0]->dev_addr);
686
687         /* initialize protocol specific functions */
688         if (protocol_version == PRP_V1) {
689                 /* For PRP, lan_id has most significant 3 bits holding
690                  * the net_id of PRP_LAN_ID
691                  */
692                 hsr->net_id = PRP_LAN_ID << 1;
693                 hsr->proto_ops = &prp_ops;
694         } else {
695                 hsr->proto_ops = &hsr_ops;
696         }
697
698         /* Make sure we recognize frames from ourselves in hsr_rcv() */
699         res = hsr_create_self_node(hsr, hsr_dev->dev_addr,
700                                    slave[1]->dev_addr);
701         if (res < 0)
702                 return res;
703
704         spin_lock_init(&hsr->seqnr_lock);
705         /* Overflow soon to find bugs easier: */
706         hsr->sequence_nr = HSR_SEQNR_START;
707         hsr->sup_sequence_nr = HSR_SUP_SEQNR_START;
708
709         timer_setup(&hsr->announce_timer, hsr_announce, 0);
710         timer_setup(&hsr->prune_timer, hsr_prune_nodes, 0);
711         timer_setup(&hsr->prune_proxy_timer, hsr_prune_proxy_nodes, 0);
712         timer_setup(&hsr->announce_proxy_timer, hsr_proxy_announce, 0);
713
714         ether_addr_copy(hsr->sup_multicast_addr, def_multicast_addr);
715         hsr->sup_multicast_addr[ETH_ALEN - 1] = multicast_spec;
716
717         hsr->prot_version = protocol_version;
718
719         /* Make sure the 1st call to netif_carrier_on() gets through */
720         netif_carrier_off(hsr_dev);
721
722         res = hsr_add_port(hsr, hsr_dev, HSR_PT_MASTER, extack);
723         if (res)
724                 goto err_add_master;
725
726         /* HSR forwarding offload supported in lower device? */
727         if ((slave[0]->features & NETIF_F_HW_HSR_FWD) &&
728             (slave[1]->features & NETIF_F_HW_HSR_FWD))
729                 hsr->fwd_offloaded = true;
730
731         if ((slave[0]->features & NETIF_F_HW_VLAN_CTAG_FILTER) &&
732             (slave[1]->features & NETIF_F_HW_VLAN_CTAG_FILTER))
733                 hsr_dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
734
735         res = register_netdevice(hsr_dev);
736         if (res)
737                 goto err_unregister;
738
739         unregister = true;
740
741         res = hsr_add_port(hsr, slave[0], HSR_PT_SLAVE_A, extack);
742         if (res)
743                 goto err_unregister;
744
745         res = hsr_add_port(hsr, slave[1], HSR_PT_SLAVE_B, extack);
746         if (res)
747                 goto err_unregister;
748
749         if (interlink) {
750                 res = hsr_add_port(hsr, interlink, HSR_PT_INTERLINK, extack);
751                 if (res)
752                         goto err_unregister;
753
754                 hsr->redbox = true;
755                 ether_addr_copy(hsr->macaddress_redbox, interlink->dev_addr);
756                 mod_timer(&hsr->prune_proxy_timer,
757                           jiffies + msecs_to_jiffies(PRUNE_PROXY_PERIOD));
758         }
759
760         hsr_debugfs_init(hsr, hsr_dev);
761         mod_timer(&hsr->prune_timer, jiffies + msecs_to_jiffies(PRUNE_PERIOD));
762
763         return 0;
764
765 err_unregister:
766         hsr_del_ports(hsr);
767 err_add_master:
768         hsr_del_self_node(hsr);
769
770         if (unregister)
771                 unregister_netdevice(hsr_dev);
772         return res;
773 }
This page took 0.068737 seconds and 4 git commands to generate.