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 netif_set_operstate(dev, IF_OPER_DOWN); 37 return; 38 } 39 40 if (has_carrier) 41 netif_set_operstate(dev, IF_OPER_UP); 42 else 43 netif_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_rtnl(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_rtnl(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_rtnl(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_rtnl(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_rtnl(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 rcu_read_lock(); 230 master = hsr_port_get_hsr(hsr, HSR_PT_MASTER); 231 if (master) { 232 skb->dev = master->dev; 233 skb_reset_mac_header(skb); 234 skb_reset_mac_len(skb); 235 spin_lock_bh(&hsr->seqnr_lock); 236 hsr_forward_skb(skb, master); 237 spin_unlock_bh(&hsr->seqnr_lock); 238 } else { 239 dev_core_stats_tx_dropped_inc(dev); 240 dev_kfree_skb_any(skb); 241 } 242 rcu_read_unlock(); 243 244 return NETDEV_TX_OK; 245 } 246 247 static const struct header_ops hsr_header_ops = { 248 .create = eth_header, 249 .parse = eth_header_parse, 250 }; 251 252 static struct sk_buff *hsr_init_skb(struct hsr_port *master, int extra) 253 { 254 struct hsr_priv *hsr = master->hsr; 255 struct sk_buff *skb; 256 int hlen, tlen; 257 int len; 258 259 hlen = LL_RESERVED_SPACE(master->dev); 260 tlen = master->dev->needed_tailroom; 261 len = sizeof(struct hsr_sup_tag) + sizeof(struct hsr_sup_payload); 262 /* skb size is same for PRP/HSR frames, only difference 263 * being, for PRP it is a trailer and for HSR it is a 264 * header. 265 * RedBox might use @extra more bytes. 266 */ 267 skb = dev_alloc_skb(len + extra + hlen + tlen); 268 269 if (!skb) 270 return skb; 271 272 skb_reserve(skb, hlen); 273 skb->dev = master->dev; 274 skb->priority = TC_PRIO_CONTROL; 275 276 skb_reset_network_header(skb); 277 skb_reset_transport_header(skb); 278 if (dev_hard_header(skb, skb->dev, ETH_P_PRP, 279 hsr->sup_multicast_addr, 280 skb->dev->dev_addr, skb->len) <= 0) 281 goto out; 282 283 skb_reset_mac_header(skb); 284 skb_reset_mac_len(skb); 285 286 return skb; 287 out: 288 kfree_skb(skb); 289 290 return NULL; 291 } 292 293 static void send_hsr_supervision_frame(struct hsr_port *port, 294 unsigned long *interval, 295 const unsigned char *addr) 296 { 297 struct hsr_priv *hsr = port->hsr; 298 __u8 type = HSR_TLV_LIFE_CHECK; 299 struct hsr_sup_payload *hsr_sp; 300 struct hsr_sup_tlv *hsr_stlv; 301 struct hsr_sup_tag *hsr_stag; 302 struct sk_buff *skb; 303 int extra = 0; 304 305 *interval = msecs_to_jiffies(HSR_LIFE_CHECK_INTERVAL); 306 if (hsr->announce_count < 3 && hsr->prot_version == 0) { 307 type = HSR_TLV_ANNOUNCE; 308 *interval = msecs_to_jiffies(HSR_ANNOUNCE_INTERVAL); 309 hsr->announce_count++; 310 } 311 312 if (hsr->redbox) 313 extra = sizeof(struct hsr_sup_tlv) + 314 sizeof(struct hsr_sup_payload); 315 316 skb = hsr_init_skb(port, extra); 317 if (!skb) { 318 netdev_warn_once(port->dev, "HSR: Could not send supervision frame\n"); 319 return; 320 } 321 322 hsr_stag = skb_put(skb, sizeof(struct hsr_sup_tag)); 323 set_hsr_stag_path(hsr_stag, (hsr->prot_version ? 0x0 : 0xf)); 324 set_hsr_stag_HSR_ver(hsr_stag, hsr->prot_version); 325 326 /* From HSRv1 on we have separate supervision sequence numbers. */ 327 spin_lock_bh(&hsr->seqnr_lock); 328 if (hsr->prot_version > 0) { 329 hsr_stag->sequence_nr = htons(hsr->sup_sequence_nr); 330 hsr->sup_sequence_nr++; 331 } else { 332 hsr_stag->sequence_nr = htons(hsr->sequence_nr); 333 hsr->sequence_nr++; 334 } 335 336 hsr_stag->tlv.HSR_TLV_type = type; 337 /* TODO: Why 12 in HSRv0? */ 338 hsr_stag->tlv.HSR_TLV_length = hsr->prot_version ? 339 sizeof(struct hsr_sup_payload) : 12; 340 341 /* Payload: MacAddressA / SAN MAC from ProxyNodeTable */ 342 hsr_sp = skb_put(skb, sizeof(struct hsr_sup_payload)); 343 ether_addr_copy(hsr_sp->macaddress_A, addr); 344 345 if (hsr->redbox && 346 hsr_is_node_in_db(&hsr->proxy_node_db, addr)) { 347 hsr_stlv = skb_put(skb, sizeof(struct hsr_sup_tlv)); 348 hsr_stlv->HSR_TLV_type = PRP_TLV_REDBOX_MAC; 349 hsr_stlv->HSR_TLV_length = sizeof(struct hsr_sup_payload); 350 351 /* Payload: MacAddressRedBox */ 352 hsr_sp = skb_put(skb, sizeof(struct hsr_sup_payload)); 353 ether_addr_copy(hsr_sp->macaddress_A, hsr->macaddress_redbox); 354 } 355 356 if (skb_put_padto(skb, ETH_ZLEN)) { 357 spin_unlock_bh(&hsr->seqnr_lock); 358 return; 359 } 360 361 hsr_forward_skb(skb, port); 362 spin_unlock_bh(&hsr->seqnr_lock); 363 return; 364 } 365 366 static void send_prp_supervision_frame(struct hsr_port *master, 367 unsigned long *interval, 368 const unsigned char *addr) 369 { 370 struct hsr_priv *hsr = master->hsr; 371 struct hsr_sup_payload *hsr_sp; 372 struct hsr_sup_tag *hsr_stag; 373 struct sk_buff *skb; 374 375 skb = hsr_init_skb(master, 0); 376 if (!skb) { 377 netdev_warn_once(master->dev, "PRP: Could not send supervision frame\n"); 378 return; 379 } 380 381 *interval = msecs_to_jiffies(HSR_LIFE_CHECK_INTERVAL); 382 hsr_stag = skb_put(skb, sizeof(struct hsr_sup_tag)); 383 set_hsr_stag_path(hsr_stag, (hsr->prot_version ? 0x0 : 0xf)); 384 set_hsr_stag_HSR_ver(hsr_stag, (hsr->prot_version ? 1 : 0)); 385 386 /* From HSRv1 on we have separate supervision sequence numbers. */ 387 spin_lock_bh(&hsr->seqnr_lock); 388 hsr_stag->sequence_nr = htons(hsr->sup_sequence_nr); 389 hsr->sup_sequence_nr++; 390 hsr_stag->tlv.HSR_TLV_type = PRP_TLV_LIFE_CHECK_DD; 391 hsr_stag->tlv.HSR_TLV_length = sizeof(struct hsr_sup_payload); 392 393 /* Payload: MacAddressA */ 394 hsr_sp = skb_put(skb, sizeof(struct hsr_sup_payload)); 395 ether_addr_copy(hsr_sp->macaddress_A, master->dev->dev_addr); 396 397 if (skb_put_padto(skb, ETH_ZLEN)) { 398 spin_unlock_bh(&hsr->seqnr_lock); 399 return; 400 } 401 402 hsr_forward_skb(skb, master); 403 spin_unlock_bh(&hsr->seqnr_lock); 404 } 405 406 /* Announce (supervision frame) timer function 407 */ 408 static void hsr_announce(struct timer_list *t) 409 { 410 struct hsr_priv *hsr; 411 struct hsr_port *master; 412 unsigned long interval; 413 414 hsr = timer_container_of(hsr, t, announce_timer); 415 416 rcu_read_lock(); 417 master = hsr_port_get_hsr(hsr, HSR_PT_MASTER); 418 hsr->proto_ops->send_sv_frame(master, &interval, master->dev->dev_addr); 419 420 if (is_admin_up(master->dev)) 421 mod_timer(&hsr->announce_timer, jiffies + interval); 422 423 rcu_read_unlock(); 424 } 425 426 /* Announce (supervision frame) timer function for RedBox 427 */ 428 static void hsr_proxy_announce(struct timer_list *t) 429 { 430 struct hsr_priv *hsr = timer_container_of(hsr, t, 431 announce_proxy_timer); 432 struct hsr_port *interlink; 433 unsigned long interval = 0; 434 struct hsr_node *node; 435 436 rcu_read_lock(); 437 /* RedBOX sends supervisory frames to HSR network with MAC addresses 438 * of SAN nodes stored in ProxyNodeTable. 439 */ 440 interlink = hsr_port_get_hsr(hsr, HSR_PT_INTERLINK); 441 if (!interlink) 442 goto done; 443 444 list_for_each_entry_rcu(node, &hsr->proxy_node_db, mac_list) { 445 if (hsr_addr_is_redbox(hsr, node->macaddress_A)) 446 continue; 447 hsr->proto_ops->send_sv_frame(interlink, &interval, 448 node->macaddress_A); 449 } 450 451 if (is_admin_up(interlink->dev)) { 452 if (!interval) 453 interval = msecs_to_jiffies(HSR_ANNOUNCE_INTERVAL); 454 455 mod_timer(&hsr->announce_proxy_timer, jiffies + interval); 456 } 457 458 done: 459 rcu_read_unlock(); 460 } 461 462 void hsr_del_ports(struct hsr_priv *hsr) 463 { 464 struct hsr_port *port; 465 466 port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_A); 467 if (port) 468 hsr_del_port(port); 469 470 port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_B); 471 if (port) 472 hsr_del_port(port); 473 474 port = hsr_port_get_hsr(hsr, HSR_PT_INTERLINK); 475 if (port) 476 hsr_del_port(port); 477 478 port = hsr_port_get_hsr(hsr, HSR_PT_MASTER); 479 if (port) 480 hsr_del_port(port); 481 } 482 483 static void hsr_set_rx_mode(struct net_device *dev) 484 { 485 struct hsr_port *port; 486 struct hsr_priv *hsr; 487 488 hsr = netdev_priv(dev); 489 490 hsr_for_each_port_rtnl(hsr, port) { 491 if (port->type == HSR_PT_MASTER) 492 continue; 493 switch (port->type) { 494 case HSR_PT_SLAVE_A: 495 case HSR_PT_SLAVE_B: 496 dev_mc_sync_multiple(port->dev, dev); 497 dev_uc_sync_multiple(port->dev, dev); 498 break; 499 default: 500 break; 501 } 502 } 503 } 504 505 static void hsr_change_rx_flags(struct net_device *dev, int change) 506 { 507 struct hsr_port *port; 508 struct hsr_priv *hsr; 509 510 hsr = netdev_priv(dev); 511 512 hsr_for_each_port_rtnl(hsr, port) { 513 if (port->type == HSR_PT_MASTER) 514 continue; 515 switch (port->type) { 516 case HSR_PT_SLAVE_A: 517 case HSR_PT_SLAVE_B: 518 if (change & IFF_ALLMULTI) 519 dev_set_allmulti(port->dev, 520 dev->flags & 521 IFF_ALLMULTI ? 1 : -1); 522 break; 523 default: 524 break; 525 } 526 } 527 } 528 529 static int hsr_ndo_vlan_rx_add_vid(struct net_device *dev, 530 __be16 proto, u16 vid) 531 { 532 bool is_slave_a_added = false; 533 bool is_slave_b_added = false; 534 struct hsr_port *port; 535 struct hsr_priv *hsr; 536 int ret = 0; 537 538 hsr = netdev_priv(dev); 539 540 hsr_for_each_port_rtnl(hsr, port) { 541 if (port->type == HSR_PT_MASTER || 542 port->type == HSR_PT_INTERLINK) 543 continue; 544 545 ret = vlan_vid_add(port->dev, proto, vid); 546 switch (port->type) { 547 case HSR_PT_SLAVE_A: 548 if (ret) { 549 /* clean up Slave-B */ 550 netdev_err(dev, "add vid failed for Slave-A\n"); 551 if (is_slave_b_added) 552 vlan_vid_del(port->dev, proto, vid); 553 return ret; 554 } 555 556 is_slave_a_added = true; 557 break; 558 559 case HSR_PT_SLAVE_B: 560 if (ret) { 561 /* clean up Slave-A */ 562 netdev_err(dev, "add vid failed for Slave-B\n"); 563 if (is_slave_a_added) 564 vlan_vid_del(port->dev, proto, vid); 565 return ret; 566 } 567 568 is_slave_b_added = true; 569 break; 570 default: 571 break; 572 } 573 } 574 575 return 0; 576 } 577 578 static int hsr_ndo_vlan_rx_kill_vid(struct net_device *dev, 579 __be16 proto, u16 vid) 580 { 581 struct hsr_port *port; 582 struct hsr_priv *hsr; 583 584 hsr = netdev_priv(dev); 585 586 hsr_for_each_port_rtnl(hsr, port) { 587 switch (port->type) { 588 case HSR_PT_SLAVE_A: 589 case HSR_PT_SLAVE_B: 590 vlan_vid_del(port->dev, proto, vid); 591 break; 592 default: 593 break; 594 } 595 } 596 597 return 0; 598 } 599 600 static const struct net_device_ops hsr_device_ops = { 601 .ndo_change_mtu = hsr_dev_change_mtu, 602 .ndo_open = hsr_dev_open, 603 .ndo_stop = hsr_dev_close, 604 .ndo_start_xmit = hsr_dev_xmit, 605 .ndo_change_rx_flags = hsr_change_rx_flags, 606 .ndo_fix_features = hsr_fix_features, 607 .ndo_set_rx_mode = hsr_set_rx_mode, 608 .ndo_vlan_rx_add_vid = hsr_ndo_vlan_rx_add_vid, 609 .ndo_vlan_rx_kill_vid = hsr_ndo_vlan_rx_kill_vid, 610 }; 611 612 static const struct device_type hsr_type = { 613 .name = "hsr", 614 }; 615 616 static struct hsr_proto_ops hsr_ops = { 617 .send_sv_frame = send_hsr_supervision_frame, 618 .create_tagged_frame = hsr_create_tagged_frame, 619 .get_untagged_frame = hsr_get_untagged_frame, 620 .drop_frame = hsr_drop_frame, 621 .fill_frame_info = hsr_fill_frame_info, 622 .invalid_dan_ingress_frame = hsr_invalid_dan_ingress_frame, 623 .register_frame_out = hsr_register_frame_out, 624 }; 625 626 static struct hsr_proto_ops prp_ops = { 627 .send_sv_frame = send_prp_supervision_frame, 628 .create_tagged_frame = prp_create_tagged_frame, 629 .get_untagged_frame = prp_get_untagged_frame, 630 .drop_frame = prp_drop_frame, 631 .fill_frame_info = prp_fill_frame_info, 632 .handle_san_frame = prp_handle_san_frame, 633 .update_san_info = prp_update_san_info, 634 .register_frame_out = prp_register_frame_out, 635 }; 636 637 void hsr_dev_setup(struct net_device *dev) 638 { 639 eth_hw_addr_random(dev); 640 641 ether_setup(dev); 642 dev->min_mtu = 0; 643 dev->header_ops = &hsr_header_ops; 644 dev->netdev_ops = &hsr_device_ops; 645 SET_NETDEV_DEVTYPE(dev, &hsr_type); 646 dev->priv_flags |= IFF_NO_QUEUE | IFF_DISABLE_NETPOLL; 647 /* Prevent recursive tx locking */ 648 dev->lltx = true; 649 /* Not sure about this. Taken from bridge code. netdevice.h says 650 * it means "Does not change network namespaces". 651 */ 652 dev->netns_immutable = true; 653 654 dev->needs_free_netdev = true; 655 656 dev->hw_features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA | 657 NETIF_F_GSO_MASK | NETIF_F_HW_CSUM | 658 NETIF_F_HW_VLAN_CTAG_TX | 659 NETIF_F_HW_VLAN_CTAG_FILTER; 660 661 dev->features = dev->hw_features; 662 } 663 664 /* Return true if dev is a HSR master; return false otherwise. 665 */ 666 bool is_hsr_master(struct net_device *dev) 667 { 668 return (dev->netdev_ops->ndo_start_xmit == hsr_dev_xmit); 669 } 670 EXPORT_SYMBOL(is_hsr_master); 671 672 struct net_device *hsr_get_port_ndev(struct net_device *ndev, 673 enum hsr_port_type pt) 674 { 675 struct hsr_priv *hsr = netdev_priv(ndev); 676 struct hsr_port *port; 677 678 rcu_read_lock(); 679 hsr_for_each_port(hsr, port) 680 if (port->type == pt) { 681 dev_hold(port->dev); 682 rcu_read_unlock(); 683 return port->dev; 684 } 685 rcu_read_unlock(); 686 return NULL; 687 } 688 EXPORT_SYMBOL(hsr_get_port_ndev); 689 690 /* Default multicast address for HSR Supervision frames */ 691 static const unsigned char def_multicast_addr[ETH_ALEN] __aligned(2) = { 692 0x01, 0x15, 0x4e, 0x00, 0x01, 0x00 693 }; 694 695 int hsr_dev_finalize(struct net_device *hsr_dev, struct net_device *slave[2], 696 struct net_device *interlink, unsigned char multicast_spec, 697 u8 protocol_version, struct netlink_ext_ack *extack) 698 { 699 bool unregister = false; 700 struct hsr_priv *hsr; 701 int res; 702 703 hsr = netdev_priv(hsr_dev); 704 INIT_LIST_HEAD(&hsr->ports); 705 INIT_LIST_HEAD(&hsr->node_db); 706 INIT_LIST_HEAD(&hsr->proxy_node_db); 707 spin_lock_init(&hsr->list_lock); 708 709 eth_hw_addr_set(hsr_dev, slave[0]->dev_addr); 710 711 /* initialize protocol specific functions */ 712 if (protocol_version == PRP_V1) { 713 /* For PRP, lan_id has most significant 3 bits holding 714 * the net_id of PRP_LAN_ID 715 */ 716 hsr->net_id = PRP_LAN_ID << 1; 717 hsr->proto_ops = &prp_ops; 718 } else { 719 hsr->proto_ops = &hsr_ops; 720 } 721 722 /* Make sure we recognize frames from ourselves in hsr_rcv() */ 723 res = hsr_create_self_node(hsr, hsr_dev->dev_addr, 724 slave[1]->dev_addr); 725 if (res < 0) 726 return res; 727 728 spin_lock_init(&hsr->seqnr_lock); 729 /* Overflow soon to find bugs easier: */ 730 hsr->sequence_nr = HSR_SEQNR_START; 731 hsr->sup_sequence_nr = HSR_SUP_SEQNR_START; 732 733 timer_setup(&hsr->announce_timer, hsr_announce, 0); 734 timer_setup(&hsr->prune_timer, hsr_prune_nodes, 0); 735 timer_setup(&hsr->prune_proxy_timer, hsr_prune_proxy_nodes, 0); 736 timer_setup(&hsr->announce_proxy_timer, hsr_proxy_announce, 0); 737 738 ether_addr_copy(hsr->sup_multicast_addr, def_multicast_addr); 739 hsr->sup_multicast_addr[ETH_ALEN - 1] = multicast_spec; 740 741 hsr->prot_version = protocol_version; 742 743 /* Make sure the 1st call to netif_carrier_on() gets through */ 744 netif_carrier_off(hsr_dev); 745 746 res = hsr_add_port(hsr, hsr_dev, HSR_PT_MASTER, extack); 747 if (res) 748 goto err_add_master; 749 750 /* HSR forwarding offload supported in lower device? */ 751 if ((slave[0]->features & NETIF_F_HW_HSR_FWD) && 752 (slave[1]->features & NETIF_F_HW_HSR_FWD)) 753 hsr->fwd_offloaded = true; 754 755 if ((slave[0]->features & NETIF_F_HW_VLAN_CTAG_FILTER) && 756 (slave[1]->features & NETIF_F_HW_VLAN_CTAG_FILTER)) 757 hsr_dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER; 758 759 res = register_netdevice(hsr_dev); 760 if (res) 761 goto err_unregister; 762 763 unregister = true; 764 765 res = hsr_add_port(hsr, slave[0], HSR_PT_SLAVE_A, extack); 766 if (res) 767 goto err_unregister; 768 769 res = hsr_add_port(hsr, slave[1], HSR_PT_SLAVE_B, extack); 770 if (res) 771 goto err_unregister; 772 773 if (protocol_version == PRP_V1) { 774 eth_hw_addr_set(slave[1], slave[0]->dev_addr); 775 call_netdevice_notifiers(NETDEV_CHANGEADDR, slave[1]); 776 } 777 778 if (interlink) { 779 res = hsr_add_port(hsr, interlink, HSR_PT_INTERLINK, extack); 780 if (res) 781 goto err_unregister; 782 783 hsr->redbox = true; 784 ether_addr_copy(hsr->macaddress_redbox, interlink->dev_addr); 785 mod_timer(&hsr->prune_proxy_timer, 786 jiffies + msecs_to_jiffies(PRUNE_PROXY_PERIOD)); 787 } 788 789 hsr_debugfs_init(hsr, hsr_dev); 790 mod_timer(&hsr->prune_timer, jiffies + msecs_to_jiffies(PRUNE_PERIOD)); 791 792 return 0; 793 794 err_unregister: 795 hsr_del_ports(hsr); 796 err_add_master: 797 hsr_del_self_node(hsr); 798 799 if (unregister) 800 unregister_netdevice(hsr_dev); 801 return res; 802 } 803