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