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 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) 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 } 287 288 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 } 355 356 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 */ 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 */ 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 list_for_each_entry_rcu(node, &hsr->proxy_node_db, mac_list) { 431 if (hsr_addr_is_redbox(hsr, node->macaddress_A)) 432 continue; 433 hsr->proto_ops->send_sv_frame(interlink, &interval, 434 node->macaddress_A); 435 } 436 437 if (is_admin_up(interlink->dev)) { 438 if (!interval) 439 interval = msecs_to_jiffies(HSR_ANNOUNCE_INTERVAL); 440 441 mod_timer(&hsr->announce_proxy_timer, jiffies + interval); 442 } 443 444 rcu_read_unlock(); 445 } 446 447 void hsr_del_ports(struct hsr_priv *hsr) 448 { 449 struct hsr_port *port; 450 451 port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_A); 452 if (port) 453 hsr_del_port(port); 454 455 port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_B); 456 if (port) 457 hsr_del_port(port); 458 459 port = hsr_port_get_hsr(hsr, HSR_PT_INTERLINK); 460 if (port) 461 hsr_del_port(port); 462 463 port = hsr_port_get_hsr(hsr, HSR_PT_MASTER); 464 if (port) 465 hsr_del_port(port); 466 } 467 468 static void hsr_set_rx_mode(struct net_device *dev) 469 { 470 struct hsr_port *port; 471 struct hsr_priv *hsr; 472 473 hsr = netdev_priv(dev); 474 475 hsr_for_each_port(hsr, port) { 476 if (port->type == HSR_PT_MASTER) 477 continue; 478 switch (port->type) { 479 case HSR_PT_SLAVE_A: 480 case HSR_PT_SLAVE_B: 481 dev_mc_sync_multiple(port->dev, dev); 482 dev_uc_sync_multiple(port->dev, dev); 483 break; 484 default: 485 break; 486 } 487 } 488 } 489 490 static void hsr_change_rx_flags(struct net_device *dev, int change) 491 { 492 struct hsr_port *port; 493 struct hsr_priv *hsr; 494 495 hsr = netdev_priv(dev); 496 497 hsr_for_each_port(hsr, port) { 498 if (port->type == HSR_PT_MASTER) 499 continue; 500 switch (port->type) { 501 case HSR_PT_SLAVE_A: 502 case HSR_PT_SLAVE_B: 503 if (change & IFF_ALLMULTI) 504 dev_set_allmulti(port->dev, 505 dev->flags & 506 IFF_ALLMULTI ? 1 : -1); 507 break; 508 default: 509 break; 510 } 511 } 512 } 513 514 static const struct net_device_ops hsr_device_ops = { 515 .ndo_change_mtu = hsr_dev_change_mtu, 516 .ndo_open = hsr_dev_open, 517 .ndo_stop = hsr_dev_close, 518 .ndo_start_xmit = hsr_dev_xmit, 519 .ndo_change_rx_flags = hsr_change_rx_flags, 520 .ndo_fix_features = hsr_fix_features, 521 .ndo_set_rx_mode = hsr_set_rx_mode, 522 }; 523 524 static const struct device_type hsr_type = { 525 .name = "hsr", 526 }; 527 528 static struct hsr_proto_ops hsr_ops = { 529 .send_sv_frame = send_hsr_supervision_frame, 530 .create_tagged_frame = hsr_create_tagged_frame, 531 .get_untagged_frame = hsr_get_untagged_frame, 532 .drop_frame = hsr_drop_frame, 533 .fill_frame_info = hsr_fill_frame_info, 534 .invalid_dan_ingress_frame = hsr_invalid_dan_ingress_frame, 535 }; 536 537 static struct hsr_proto_ops prp_ops = { 538 .send_sv_frame = send_prp_supervision_frame, 539 .create_tagged_frame = prp_create_tagged_frame, 540 .get_untagged_frame = prp_get_untagged_frame, 541 .drop_frame = prp_drop_frame, 542 .fill_frame_info = prp_fill_frame_info, 543 .handle_san_frame = prp_handle_san_frame, 544 .update_san_info = prp_update_san_info, 545 }; 546 547 void hsr_dev_setup(struct net_device *dev) 548 { 549 eth_hw_addr_random(dev); 550 551 ether_setup(dev); 552 dev->min_mtu = 0; 553 dev->header_ops = &hsr_header_ops; 554 dev->netdev_ops = &hsr_device_ops; 555 SET_NETDEV_DEVTYPE(dev, &hsr_type); 556 dev->priv_flags |= IFF_NO_QUEUE | IFF_DISABLE_NETPOLL; 557 558 dev->needs_free_netdev = true; 559 560 dev->hw_features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA | 561 NETIF_F_GSO_MASK | NETIF_F_HW_CSUM | 562 NETIF_F_HW_VLAN_CTAG_TX; 563 564 dev->features = dev->hw_features; 565 566 /* Prevent recursive tx locking */ 567 dev->features |= NETIF_F_LLTX; 568 /* VLAN on top of HSR needs testing and probably some work on 569 * hsr_header_create() etc. 570 */ 571 dev->features |= NETIF_F_VLAN_CHALLENGED; 572 /* Not sure about this. Taken from bridge code. netdev_features.h says 573 * it means "Does not change network namespaces". 574 */ 575 dev->features |= NETIF_F_NETNS_LOCAL; 576 } 577 578 /* Return true if dev is a HSR master; return false otherwise. 579 */ 580 bool is_hsr_master(struct net_device *dev) 581 { 582 return (dev->netdev_ops->ndo_start_xmit == hsr_dev_xmit); 583 } 584 EXPORT_SYMBOL(is_hsr_master); 585 586 /* Default multicast address for HSR Supervision frames */ 587 static const unsigned char def_multicast_addr[ETH_ALEN] __aligned(2) = { 588 0x01, 0x15, 0x4e, 0x00, 0x01, 0x00 589 }; 590 591 int hsr_dev_finalize(struct net_device *hsr_dev, struct net_device *slave[2], 592 struct net_device *interlink, unsigned char multicast_spec, 593 u8 protocol_version, struct netlink_ext_ack *extack) 594 { 595 bool unregister = false; 596 struct hsr_priv *hsr; 597 int res; 598 599 hsr = netdev_priv(hsr_dev); 600 INIT_LIST_HEAD(&hsr->ports); 601 INIT_LIST_HEAD(&hsr->node_db); 602 INIT_LIST_HEAD(&hsr->proxy_node_db); 603 spin_lock_init(&hsr->list_lock); 604 605 eth_hw_addr_set(hsr_dev, slave[0]->dev_addr); 606 607 /* initialize protocol specific functions */ 608 if (protocol_version == PRP_V1) { 609 /* For PRP, lan_id has most significant 3 bits holding 610 * the net_id of PRP_LAN_ID 611 */ 612 hsr->net_id = PRP_LAN_ID << 1; 613 hsr->proto_ops = &prp_ops; 614 } else { 615 hsr->proto_ops = &hsr_ops; 616 } 617 618 /* Make sure we recognize frames from ourselves in hsr_rcv() */ 619 res = hsr_create_self_node(hsr, hsr_dev->dev_addr, 620 slave[1]->dev_addr); 621 if (res < 0) 622 return res; 623 624 spin_lock_init(&hsr->seqnr_lock); 625 /* Overflow soon to find bugs easier: */ 626 hsr->sequence_nr = HSR_SEQNR_START; 627 hsr->sup_sequence_nr = HSR_SUP_SEQNR_START; 628 hsr->interlink_sequence_nr = HSR_SEQNR_START; 629 630 timer_setup(&hsr->announce_timer, hsr_announce, 0); 631 timer_setup(&hsr->prune_timer, hsr_prune_nodes, 0); 632 timer_setup(&hsr->prune_proxy_timer, hsr_prune_proxy_nodes, 0); 633 timer_setup(&hsr->announce_proxy_timer, hsr_proxy_announce, 0); 634 635 ether_addr_copy(hsr->sup_multicast_addr, def_multicast_addr); 636 hsr->sup_multicast_addr[ETH_ALEN - 1] = multicast_spec; 637 638 hsr->prot_version = protocol_version; 639 640 /* Make sure the 1st call to netif_carrier_on() gets through */ 641 netif_carrier_off(hsr_dev); 642 643 res = hsr_add_port(hsr, hsr_dev, HSR_PT_MASTER, extack); 644 if (res) 645 goto err_add_master; 646 647 /* HSR forwarding offload supported in lower device? */ 648 if ((slave[0]->features & NETIF_F_HW_HSR_FWD) && 649 (slave[1]->features & NETIF_F_HW_HSR_FWD)) 650 hsr->fwd_offloaded = true; 651 652 res = register_netdevice(hsr_dev); 653 if (res) 654 goto err_unregister; 655 656 unregister = true; 657 658 res = hsr_add_port(hsr, slave[0], HSR_PT_SLAVE_A, extack); 659 if (res) 660 goto err_unregister; 661 662 res = hsr_add_port(hsr, slave[1], HSR_PT_SLAVE_B, extack); 663 if (res) 664 goto err_unregister; 665 666 if (interlink) { 667 res = hsr_add_port(hsr, interlink, HSR_PT_INTERLINK, extack); 668 if (res) 669 goto err_unregister; 670 671 hsr->redbox = true; 672 ether_addr_copy(hsr->macaddress_redbox, interlink->dev_addr); 673 mod_timer(&hsr->prune_proxy_timer, 674 jiffies + msecs_to_jiffies(PRUNE_PROXY_PERIOD)); 675 } 676 677 hsr_debugfs_init(hsr, hsr_dev); 678 mod_timer(&hsr->prune_timer, jiffies + msecs_to_jiffies(PRUNE_PERIOD)); 679 680 return 0; 681 682 err_unregister: 683 hsr_del_ports(hsr); 684 err_add_master: 685 hsr_del_self_node(hsr); 686 687 if (unregister) 688 unregister_netdevice(hsr_dev); 689 return res; 690 } 691