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 skb_set_network_header(skb, ETH_HLEN + HSR_HLEN); 324 skb_reset_mac_len(skb); 325 326 set_hsr_stag_path(hsr_stag, (hsr->prot_version ? 0x0 : 0xf)); 327 set_hsr_stag_HSR_ver(hsr_stag, hsr->prot_version); 328 329 /* From HSRv1 on we have separate supervision sequence numbers. */ 330 spin_lock_bh(&hsr->seqnr_lock); 331 if (hsr->prot_version > 0) { 332 hsr_stag->sequence_nr = htons(hsr->sup_sequence_nr); 333 hsr->sup_sequence_nr++; 334 } else { 335 hsr_stag->sequence_nr = htons(hsr->sequence_nr); 336 hsr->sequence_nr++; 337 } 338 339 hsr_stag->tlv.HSR_TLV_type = type; 340 /* HSRv0 has 6 unused bytes after the MAC */ 341 hsr_stag->tlv.HSR_TLV_length = hsr->prot_version ? 342 sizeof(struct hsr_sup_payload) : 12; 343 344 /* Payload: MacAddressA / SAN MAC from ProxyNodeTable */ 345 hsr_sp = skb_put(skb, sizeof(struct hsr_sup_payload)); 346 ether_addr_copy(hsr_sp->macaddress_A, addr); 347 348 if (hsr->redbox && 349 hsr_is_node_in_db(&hsr->proxy_node_db, addr)) { 350 hsr_stlv = skb_put(skb, sizeof(struct hsr_sup_tlv)); 351 hsr_stlv->HSR_TLV_type = PRP_TLV_REDBOX_MAC; 352 hsr_stlv->HSR_TLV_length = sizeof(struct hsr_sup_payload); 353 354 /* Payload: MacAddressRedBox */ 355 hsr_sp = skb_put(skb, sizeof(struct hsr_sup_payload)); 356 ether_addr_copy(hsr_sp->macaddress_A, hsr->macaddress_redbox); 357 } 358 359 if (skb_put_padto(skb, ETH_ZLEN)) { 360 spin_unlock_bh(&hsr->seqnr_lock); 361 return; 362 } 363 364 hsr_forward_skb(skb, port); 365 spin_unlock_bh(&hsr->seqnr_lock); 366 return; 367 } 368 369 static void send_prp_supervision_frame(struct hsr_port *master, 370 unsigned long *interval, 371 const unsigned char *addr) 372 { 373 struct hsr_priv *hsr = master->hsr; 374 struct hsr_sup_payload *hsr_sp; 375 struct hsr_sup_tlv *hsr_stlv; 376 struct hsr_sup_tag *hsr_stag; 377 struct sk_buff *skb; 378 bool redbox_proxy; 379 int extra = 0; 380 381 redbox_proxy = hsr->redbox && master->type == HSR_PT_INTERLINK; 382 383 /* A proxy-announce carries a RedBox-MAC TLV and an EOT marker. */ 384 if (redbox_proxy) 385 extra = sizeof(struct hsr_sup_tlv) + 386 sizeof(struct hsr_sup_payload) + 387 sizeof(struct hsr_sup_tlv); 388 389 skb = hsr_init_skb(master, extra); 390 if (!skb) { 391 netdev_warn_once(master->dev, "PRP: Could not send supervision frame\n"); 392 return; 393 } 394 395 *interval = msecs_to_jiffies(HSR_LIFE_CHECK_INTERVAL); 396 hsr_stag = skb_put(skb, sizeof(struct hsr_sup_tag)); 397 set_hsr_stag_path(hsr_stag, (hsr->prot_version ? 0x0 : 0xf)); 398 set_hsr_stag_HSR_ver(hsr_stag, (hsr->prot_version ? 1 : 0)); 399 400 /* From HSRv1 on we have separate supervision sequence numbers. */ 401 spin_lock_bh(&hsr->seqnr_lock); 402 hsr_stag->sequence_nr = htons(hsr->sup_sequence_nr); 403 hsr->sup_sequence_nr++; 404 hsr_stag->tlv.HSR_TLV_type = PRP_TLV_LIFE_CHECK_DD; 405 hsr_stag->tlv.HSR_TLV_length = sizeof(struct hsr_sup_payload); 406 407 /* Payload: MacAddressA, the announced node. */ 408 hsr_sp = skb_put(skb, sizeof(struct hsr_sup_payload)); 409 ether_addr_copy(hsr_sp->macaddress_A, addr); 410 411 /* Proxy-announce: append the RedBox-MAC TLV (Type 30) and an explicit 412 * EOT to terminate the TLV chain before zero padding. 413 */ 414 if (redbox_proxy) { 415 hsr_stlv = skb_put(skb, sizeof(struct hsr_sup_tlv)); 416 hsr_stlv->HSR_TLV_type = PRP_TLV_REDBOX_MAC; 417 hsr_stlv->HSR_TLV_length = sizeof(struct hsr_sup_payload); 418 419 hsr_sp = skb_put(skb, sizeof(struct hsr_sup_payload)); 420 ether_addr_copy(hsr_sp->macaddress_A, hsr->macaddress_redbox); 421 422 hsr_stlv = skb_put(skb, sizeof(struct hsr_sup_tlv)); 423 hsr_stlv->HSR_TLV_type = HSR_TLV_EOT; 424 hsr_stlv->HSR_TLV_length = 0; 425 } 426 427 if (skb_put_padto(skb, ETH_ZLEN)) { 428 spin_unlock_bh(&hsr->seqnr_lock); 429 return; 430 } 431 432 hsr_forward_skb(skb, master); 433 spin_unlock_bh(&hsr->seqnr_lock); 434 } 435 436 /* Announce (supervision frame) timer function 437 */ 438 static void hsr_announce(struct timer_list *t) 439 { 440 struct hsr_priv *hsr; 441 struct hsr_port *master; 442 unsigned long interval; 443 444 hsr = timer_container_of(hsr, t, announce_timer); 445 446 rcu_read_lock(); 447 master = hsr_port_get_hsr(hsr, HSR_PT_MASTER); 448 hsr->proto_ops->send_sv_frame(master, &interval, master->dev->dev_addr); 449 450 if (is_admin_up(master->dev)) 451 mod_timer(&hsr->announce_timer, jiffies + interval); 452 453 rcu_read_unlock(); 454 } 455 456 /* Announce (supervision frame) timer function for RedBox 457 */ 458 static void hsr_proxy_announce(struct timer_list *t) 459 { 460 struct hsr_priv *hsr = timer_container_of(hsr, t, 461 announce_proxy_timer); 462 struct hsr_port *interlink; 463 unsigned long interval = 0; 464 struct hsr_node *node; 465 466 rcu_read_lock(); 467 /* RedBOX sends supervisory frames to HSR network with MAC addresses 468 * of SAN nodes stored in ProxyNodeTable. 469 */ 470 interlink = hsr_port_get_hsr(hsr, HSR_PT_INTERLINK); 471 if (!interlink) 472 goto done; 473 474 list_for_each_entry_rcu(node, &hsr->proxy_node_db, mac_list) { 475 if (hsr_addr_is_redbox(hsr, node->macaddress_A)) 476 continue; 477 hsr->proto_ops->send_sv_frame(interlink, &interval, 478 node->macaddress_A); 479 } 480 481 if (is_admin_up(interlink->dev)) { 482 if (!interval) 483 interval = msecs_to_jiffies(HSR_ANNOUNCE_INTERVAL); 484 485 mod_timer(&hsr->announce_proxy_timer, jiffies + interval); 486 } 487 488 done: 489 rcu_read_unlock(); 490 } 491 492 void hsr_del_ports(struct hsr_priv *hsr) 493 { 494 struct hsr_port *port; 495 496 port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_A); 497 if (port) 498 hsr_del_port(port); 499 500 port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_B); 501 if (port) 502 hsr_del_port(port); 503 504 port = hsr_port_get_hsr(hsr, HSR_PT_INTERLINK); 505 if (port) 506 hsr_del_port(port); 507 508 port = hsr_port_get_hsr(hsr, HSR_PT_MASTER); 509 if (port) 510 hsr_del_port(port); 511 } 512 513 static void hsr_set_rx_mode(struct net_device *dev) 514 { 515 struct hsr_port *port; 516 struct hsr_priv *hsr; 517 518 hsr = netdev_priv(dev); 519 520 hsr_for_each_port_rtnl(hsr, port) { 521 if (port->type == HSR_PT_MASTER) 522 continue; 523 switch (port->type) { 524 case HSR_PT_SLAVE_A: 525 case HSR_PT_SLAVE_B: 526 dev_mc_sync_multiple(port->dev, dev); 527 dev_uc_sync_multiple(port->dev, dev); 528 break; 529 default: 530 break; 531 } 532 } 533 } 534 535 static void hsr_change_rx_flags(struct net_device *dev, int change) 536 { 537 struct hsr_port *port; 538 struct hsr_priv *hsr; 539 540 hsr = netdev_priv(dev); 541 542 hsr_for_each_port_rtnl(hsr, port) { 543 if (port->type == HSR_PT_MASTER) 544 continue; 545 switch (port->type) { 546 case HSR_PT_SLAVE_A: 547 case HSR_PT_SLAVE_B: 548 if (change & IFF_ALLMULTI) 549 dev_set_allmulti(port->dev, 550 dev->flags & 551 IFF_ALLMULTI ? 1 : -1); 552 break; 553 default: 554 break; 555 } 556 } 557 } 558 559 static int hsr_ndo_vlan_rx_add_vid(struct net_device *dev, 560 __be16 proto, u16 vid) 561 { 562 struct net_device *slave_a_dev = NULL; 563 struct net_device *slave_b_dev = NULL; 564 struct hsr_port *port; 565 struct hsr_priv *hsr; 566 int ret = 0; 567 568 hsr = netdev_priv(dev); 569 570 hsr_for_each_port_rtnl(hsr, port) { 571 if (port->type == HSR_PT_MASTER || 572 port->type == HSR_PT_INTERLINK) 573 continue; 574 575 ret = vlan_vid_add(port->dev, proto, vid); 576 switch (port->type) { 577 case HSR_PT_SLAVE_A: 578 if (ret) { 579 netdev_err(dev, "add vid failed for Slave-A\n"); 580 goto unwind; 581 } 582 slave_a_dev = port->dev; 583 break; 584 case HSR_PT_SLAVE_B: 585 if (ret) { 586 netdev_err(dev, "add vid failed for Slave-B\n"); 587 goto unwind; 588 } 589 slave_b_dev = port->dev; 590 break; 591 default: 592 if (ret) 593 goto unwind; 594 break; 595 } 596 } 597 598 return 0; 599 600 unwind: 601 if (slave_a_dev) 602 vlan_vid_del(slave_a_dev, proto, vid); 603 604 if (slave_b_dev) 605 vlan_vid_del(slave_b_dev, proto, vid); 606 607 return ret; 608 } 609 610 static int hsr_ndo_vlan_rx_kill_vid(struct net_device *dev, 611 __be16 proto, u16 vid) 612 { 613 struct hsr_port *port; 614 struct hsr_priv *hsr; 615 616 hsr = netdev_priv(dev); 617 618 hsr_for_each_port_rtnl(hsr, port) { 619 switch (port->type) { 620 case HSR_PT_SLAVE_A: 621 case HSR_PT_SLAVE_B: 622 vlan_vid_del(port->dev, proto, vid); 623 break; 624 default: 625 break; 626 } 627 } 628 629 return 0; 630 } 631 632 static const struct net_device_ops hsr_device_ops = { 633 .ndo_change_mtu = hsr_dev_change_mtu, 634 .ndo_open = hsr_dev_open, 635 .ndo_stop = hsr_dev_close, 636 .ndo_start_xmit = hsr_dev_xmit, 637 .ndo_change_rx_flags = hsr_change_rx_flags, 638 .ndo_fix_features = hsr_fix_features, 639 .ndo_set_rx_mode = hsr_set_rx_mode, 640 .ndo_vlan_rx_add_vid = hsr_ndo_vlan_rx_add_vid, 641 .ndo_vlan_rx_kill_vid = hsr_ndo_vlan_rx_kill_vid, 642 }; 643 644 static const struct device_type hsr_type = { 645 .name = "hsr", 646 }; 647 648 static const struct hsr_proto_ops hsr_ops = { 649 .send_sv_frame = send_hsr_supervision_frame, 650 .create_tagged_frame = hsr_create_tagged_frame, 651 .get_untagged_frame = hsr_get_untagged_frame, 652 .drop_frame = hsr_drop_frame, 653 .fill_frame_info = hsr_fill_frame_info, 654 .invalid_dan_ingress_frame = hsr_invalid_dan_ingress_frame, 655 .register_frame_out = hsr_register_frame_out, 656 }; 657 658 static const struct hsr_proto_ops prp_ops = { 659 .send_sv_frame = send_prp_supervision_frame, 660 .create_tagged_frame = prp_create_tagged_frame, 661 .get_untagged_frame = prp_get_untagged_frame, 662 .drop_frame = prp_drop_frame, 663 .fill_frame_info = prp_fill_frame_info, 664 .handle_san_frame = prp_handle_san_frame, 665 .update_san_info = prp_update_san_info, 666 .register_frame_out = prp_register_frame_out, 667 }; 668 669 void hsr_dev_setup(struct net_device *dev) 670 { 671 eth_hw_addr_random(dev); 672 673 ether_setup(dev); 674 dev->min_mtu = 0; 675 dev->header_ops = &hsr_header_ops; 676 dev->netdev_ops = &hsr_device_ops; 677 SET_NETDEV_DEVTYPE(dev, &hsr_type); 678 dev->priv_flags |= IFF_NO_QUEUE | IFF_DISABLE_NETPOLL; 679 /* Prevent recursive tx locking */ 680 dev->lltx = true; 681 /* Not sure about this. Taken from bridge code. netdevice.h says 682 * it means "Does not change network namespaces". 683 */ 684 dev->netns_immutable = true; 685 686 dev->needs_free_netdev = true; 687 688 dev->hw_features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA | 689 NETIF_F_GSO_MASK | NETIF_F_HW_CSUM | 690 NETIF_F_HW_VLAN_CTAG_TX | 691 NETIF_F_HW_VLAN_CTAG_FILTER; 692 693 dev->features = dev->hw_features; 694 } 695 696 /* Return true if dev is a HSR master; return false otherwise. 697 */ 698 bool is_hsr_master(struct net_device *dev) 699 { 700 return (dev->netdev_ops->ndo_start_xmit == hsr_dev_xmit); 701 } 702 EXPORT_SYMBOL(is_hsr_master); 703 704 struct net_device *hsr_get_port_ndev(struct net_device *ndev, 705 enum hsr_port_type pt) 706 { 707 struct hsr_priv *hsr = netdev_priv(ndev); 708 struct hsr_port *port; 709 710 rcu_read_lock(); 711 hsr_for_each_port(hsr, port) 712 if (port->type == pt) { 713 dev_hold(port->dev); 714 rcu_read_unlock(); 715 return port->dev; 716 } 717 rcu_read_unlock(); 718 return NULL; 719 } 720 EXPORT_SYMBOL(hsr_get_port_ndev); 721 722 int hsr_get_port_type(struct net_device *hsr_dev, struct net_device *dev, 723 enum hsr_port_type *type) 724 { 725 struct hsr_priv *hsr = netdev_priv(hsr_dev); 726 struct hsr_port *port; 727 728 rcu_read_lock(); 729 hsr_for_each_port(hsr, port) { 730 if (port->dev == dev) { 731 *type = port->type; 732 rcu_read_unlock(); 733 return 0; 734 } 735 } 736 rcu_read_unlock(); 737 738 return -EINVAL; 739 } 740 EXPORT_SYMBOL(hsr_get_port_type); 741 742 /* Default multicast address for HSR Supervision frames */ 743 static const unsigned char def_multicast_addr[ETH_ALEN] __aligned(2) = { 744 0x01, 0x15, 0x4e, 0x00, 0x01, 0x00 745 }; 746 747 int hsr_dev_finalize(struct net_device *hsr_dev, struct net_device *slave[2], 748 struct net_device *interlink, unsigned char multicast_spec, 749 u8 protocol_version, struct netlink_ext_ack *extack) 750 { 751 bool unregister = false; 752 struct hsr_priv *hsr; 753 int res; 754 755 hsr = netdev_priv(hsr_dev); 756 INIT_LIST_HEAD(&hsr->ports); 757 INIT_LIST_HEAD(&hsr->node_db); 758 INIT_LIST_HEAD(&hsr->proxy_node_db); 759 spin_lock_init(&hsr->list_lock); 760 761 eth_hw_addr_set(hsr_dev, slave[0]->dev_addr); 762 763 /* initialize protocol specific functions */ 764 if (protocol_version == PRP_V1) { 765 /* For PRP, lan_id has most significant 3 bits holding 766 * the net_id of PRP_LAN_ID 767 */ 768 hsr->net_id = PRP_LAN_ID << 1; 769 hsr->proto_ops = &prp_ops; 770 } else { 771 hsr->proto_ops = &hsr_ops; 772 } 773 774 /* Make sure we recognize frames from ourselves in hsr_handle_frame() */ 775 res = hsr_create_self_node(hsr, hsr_dev->dev_addr, 776 slave[1]->dev_addr); 777 if (res < 0) 778 return res; 779 780 spin_lock_init(&hsr->seqnr_lock); 781 /* Overflow soon to find bugs easier: */ 782 hsr->sequence_nr = HSR_SEQNR_START; 783 hsr->sup_sequence_nr = HSR_SUP_SEQNR_START; 784 785 timer_setup(&hsr->announce_timer, hsr_announce, 0); 786 timer_setup(&hsr->prune_timer, hsr_prune_nodes, 0); 787 timer_setup(&hsr->prune_proxy_timer, hsr_prune_proxy_nodes, 0); 788 timer_setup(&hsr->announce_proxy_timer, hsr_proxy_announce, 0); 789 790 ether_addr_copy(hsr->sup_multicast_addr, def_multicast_addr); 791 hsr->sup_multicast_addr[ETH_ALEN - 1] = multicast_spec; 792 793 hsr->prot_version = protocol_version; 794 795 /* Make sure the 1st call to netif_carrier_on() gets through */ 796 netif_carrier_off(hsr_dev); 797 798 /* Publish the RedBox state before any port is attached: the rx 799 * handlers are live from hsr_add_port() on, and hsr_add_node() 800 * sizes each node's per-port sequence state from hsr->redbox. 801 */ 802 if (interlink) { 803 hsr->redbox = true; 804 ether_addr_copy(hsr->macaddress_redbox, interlink->dev_addr); 805 } 806 807 res = hsr_add_port(hsr, hsr_dev, HSR_PT_MASTER, extack); 808 if (res) 809 goto err_add_master; 810 811 /* HSR forwarding offload supported in lower device? */ 812 if ((slave[0]->features & NETIF_F_HW_HSR_FWD) && 813 (slave[1]->features & NETIF_F_HW_HSR_FWD)) 814 hsr->fwd_offloaded = true; 815 816 if ((slave[0]->features & NETIF_F_HW_VLAN_CTAG_FILTER) && 817 (slave[1]->features & NETIF_F_HW_VLAN_CTAG_FILTER)) 818 hsr_dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER; 819 820 res = register_netdevice(hsr_dev); 821 if (res) 822 goto err_unregister; 823 824 unregister = true; 825 826 res = hsr_add_port(hsr, slave[0], HSR_PT_SLAVE_A, extack); 827 if (res) 828 goto err_unregister; 829 830 res = hsr_add_port(hsr, slave[1], HSR_PT_SLAVE_B, extack); 831 if (res) 832 goto err_unregister; 833 834 if (protocol_version == PRP_V1) { 835 eth_hw_addr_set(slave[1], slave[0]->dev_addr); 836 call_netdevice_notifiers(NETDEV_CHANGEADDR, slave[1]); 837 } 838 839 if (interlink) { 840 res = hsr_add_port(hsr, interlink, HSR_PT_INTERLINK, extack); 841 if (res) 842 goto err_unregister; 843 844 mod_timer(&hsr->prune_proxy_timer, 845 jiffies + msecs_to_jiffies(PRUNE_PROXY_PERIOD)); 846 } 847 848 hsr_debugfs_init(hsr, hsr_dev); 849 mod_timer(&hsr->prune_timer, jiffies + msecs_to_jiffies(PRUNE_PERIOD)); 850 851 return 0; 852 853 err_unregister: 854 hsr_del_ports(hsr); 855 err_add_master: 856 hsr_del_self_node(hsr); 857 858 if (unregister) 859 unregister_netdevice(hsr_dev); 860 return res; 861 } 862