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, 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 } 774