1 /* 2 * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved. 3 * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved. 4 * 5 * This software is available to you under a choice of one of two 6 * licenses. You may choose to be licensed under the terms of the GNU 7 * General Public License (GPL) Version 2, available from the file 8 * COPYING in the main directory of this source tree, or the 9 * OpenIB.org BSD license below: 10 * 11 * Redistribution and use in source and binary forms, with or 12 * without modification, are permitted provided that the following 13 * conditions are met: 14 * 15 * - Redistributions of source code must retain the above 16 * copyright notice, this list of conditions and the following 17 * disclaimer. 18 * 19 * - Redistributions in binary form must reproduce the above 20 * copyright notice, this list of conditions and the following 21 * disclaimer in the documentation and/or other materials 22 * provided with the distribution. 23 * 24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 31 * SOFTWARE. 32 */ 33 34 #include <linux/skbuff.h> 35 #include <linux/if_arp.h> 36 #include <linux/netdevice.h> 37 #include <linux/if.h> 38 #include <linux/if_vlan.h> 39 #include <net/udp_tunnel.h> 40 #include <net/sch_generic.h> 41 #include <linux/netfilter.h> 42 #include <rdma/ib_addr.h> 43 44 #include "rxe.h" 45 #include "rxe_net.h" 46 #include "rxe_loc.h" 47 48 static LIST_HEAD(rxe_dev_list); 49 static spinlock_t dev_list_lock; /* spinlock for device list */ 50 51 struct rxe_dev *net_to_rxe(struct net_device *ndev) 52 { 53 struct rxe_dev *rxe; 54 struct rxe_dev *found = NULL; 55 56 spin_lock_bh(&dev_list_lock); 57 list_for_each_entry(rxe, &rxe_dev_list, list) { 58 if (rxe->ndev == ndev) { 59 found = rxe; 60 break; 61 } 62 } 63 spin_unlock_bh(&dev_list_lock); 64 65 return found; 66 } 67 68 struct rxe_dev *get_rxe_by_name(const char* name) 69 { 70 struct rxe_dev *rxe; 71 struct rxe_dev *found = NULL; 72 73 spin_lock_bh(&dev_list_lock); 74 list_for_each_entry(rxe, &rxe_dev_list, list) { 75 if (!strcmp(name, rxe->ib_dev.name)) { 76 found = rxe; 77 break; 78 } 79 } 80 spin_unlock_bh(&dev_list_lock); 81 return found; 82 } 83 84 85 struct rxe_recv_sockets recv_sockets; 86 87 static __be64 rxe_mac_to_eui64(struct net_device *ndev) 88 { 89 unsigned char *mac_addr = ndev->dev_addr; 90 __be64 eui64; 91 unsigned char *dst = (unsigned char *)&eui64; 92 93 dst[0] = mac_addr[0] ^ 2; 94 dst[1] = mac_addr[1]; 95 dst[2] = mac_addr[2]; 96 dst[3] = 0xff; 97 dst[4] = 0xfe; 98 dst[5] = mac_addr[3]; 99 dst[6] = mac_addr[4]; 100 dst[7] = mac_addr[5]; 101 102 return eui64; 103 } 104 105 static __be64 node_guid(struct rxe_dev *rxe) 106 { 107 return rxe_mac_to_eui64(rxe->ndev); 108 } 109 110 static __be64 port_guid(struct rxe_dev *rxe) 111 { 112 return rxe_mac_to_eui64(rxe->ndev); 113 } 114 115 static struct device *dma_device(struct rxe_dev *rxe) 116 { 117 struct net_device *ndev; 118 119 ndev = rxe->ndev; 120 121 if (ndev->priv_flags & IFF_802_1Q_VLAN) 122 ndev = vlan_dev_real_dev(ndev); 123 124 return ndev->dev.parent; 125 } 126 127 static int mcast_add(struct rxe_dev *rxe, union ib_gid *mgid) 128 { 129 int err; 130 unsigned char ll_addr[ETH_ALEN]; 131 132 ipv6_eth_mc_map((struct in6_addr *)mgid->raw, ll_addr); 133 err = dev_mc_add(rxe->ndev, ll_addr); 134 135 return err; 136 } 137 138 static int mcast_delete(struct rxe_dev *rxe, union ib_gid *mgid) 139 { 140 int err; 141 unsigned char ll_addr[ETH_ALEN]; 142 143 ipv6_eth_mc_map((struct in6_addr *)mgid->raw, ll_addr); 144 err = dev_mc_del(rxe->ndev, ll_addr); 145 146 return err; 147 } 148 149 static struct dst_entry *rxe_find_route4(struct net_device *ndev, 150 struct in_addr *saddr, 151 struct in_addr *daddr) 152 { 153 struct rtable *rt; 154 struct flowi4 fl = { { 0 } }; 155 156 memset(&fl, 0, sizeof(fl)); 157 fl.flowi4_oif = ndev->ifindex; 158 memcpy(&fl.saddr, saddr, sizeof(*saddr)); 159 memcpy(&fl.daddr, daddr, sizeof(*daddr)); 160 fl.flowi4_proto = IPPROTO_UDP; 161 162 rt = ip_route_output_key(&init_net, &fl); 163 if (IS_ERR(rt)) { 164 pr_err_ratelimited("no route to %pI4\n", &daddr->s_addr); 165 return NULL; 166 } 167 168 return &rt->dst; 169 } 170 171 #if IS_ENABLED(CONFIG_IPV6) 172 static struct dst_entry *rxe_find_route6(struct net_device *ndev, 173 struct in6_addr *saddr, 174 struct in6_addr *daddr) 175 { 176 struct dst_entry *ndst; 177 struct flowi6 fl6 = { { 0 } }; 178 179 memset(&fl6, 0, sizeof(fl6)); 180 fl6.flowi6_oif = ndev->ifindex; 181 memcpy(&fl6.saddr, saddr, sizeof(*saddr)); 182 memcpy(&fl6.daddr, daddr, sizeof(*daddr)); 183 fl6.flowi6_proto = IPPROTO_UDP; 184 185 if (unlikely(ipv6_stub->ipv6_dst_lookup(sock_net(recv_sockets.sk6->sk), 186 recv_sockets.sk6->sk, &ndst, &fl6))) { 187 pr_err_ratelimited("no route to %pI6\n", daddr); 188 goto put; 189 } 190 191 if (unlikely(ndst->error)) { 192 pr_err("no route to %pI6\n", daddr); 193 goto put; 194 } 195 196 return ndst; 197 put: 198 dst_release(ndst); 199 return NULL; 200 } 201 202 #else 203 204 static struct dst_entry *rxe_find_route6(struct net_device *ndev, 205 struct in6_addr *saddr, 206 struct in6_addr *daddr) 207 { 208 return NULL; 209 } 210 211 #endif 212 213 static int rxe_udp_encap_recv(struct sock *sk, struct sk_buff *skb) 214 { 215 struct udphdr *udph; 216 struct net_device *ndev = skb->dev; 217 struct rxe_dev *rxe = net_to_rxe(ndev); 218 struct rxe_pkt_info *pkt = SKB_TO_PKT(skb); 219 220 if (!rxe) 221 goto drop; 222 223 if (skb_linearize(skb)) { 224 pr_err("skb_linearize failed\n"); 225 goto drop; 226 } 227 228 udph = udp_hdr(skb); 229 pkt->rxe = rxe; 230 pkt->port_num = 1; 231 pkt->hdr = (u8 *)(udph + 1); 232 pkt->mask = RXE_GRH_MASK; 233 pkt->paylen = be16_to_cpu(udph->len) - sizeof(*udph); 234 235 return rxe_rcv(skb); 236 drop: 237 kfree_skb(skb); 238 return 0; 239 } 240 241 static struct socket *rxe_setup_udp_tunnel(struct net *net, __be16 port, 242 bool ipv6) 243 { 244 int err; 245 struct socket *sock; 246 struct udp_port_cfg udp_cfg; 247 struct udp_tunnel_sock_cfg tnl_cfg; 248 249 memset(&udp_cfg, 0, sizeof(udp_cfg)); 250 251 if (ipv6) { 252 udp_cfg.family = AF_INET6; 253 udp_cfg.ipv6_v6only = 1; 254 } else { 255 udp_cfg.family = AF_INET; 256 } 257 258 udp_cfg.local_udp_port = port; 259 260 /* Create UDP socket */ 261 err = udp_sock_create(net, &udp_cfg, &sock); 262 if (err < 0) { 263 pr_err("failed to create udp socket. err = %d\n", err); 264 return ERR_PTR(err); 265 } 266 267 tnl_cfg.sk_user_data = NULL; 268 tnl_cfg.encap_type = 1; 269 tnl_cfg.encap_rcv = rxe_udp_encap_recv; 270 tnl_cfg.encap_destroy = NULL; 271 272 /* Setup UDP tunnel */ 273 setup_udp_tunnel_sock(net, sock, &tnl_cfg); 274 275 return sock; 276 } 277 278 static void rxe_release_udp_tunnel(struct socket *sk) 279 { 280 udp_tunnel_sock_release(sk); 281 } 282 283 static void prepare_udp_hdr(struct sk_buff *skb, __be16 src_port, 284 __be16 dst_port) 285 { 286 struct udphdr *udph; 287 288 __skb_push(skb, sizeof(*udph)); 289 skb_reset_transport_header(skb); 290 udph = udp_hdr(skb); 291 292 udph->dest = dst_port; 293 udph->source = src_port; 294 udph->len = htons(skb->len); 295 udph->check = 0; 296 } 297 298 static void prepare_ipv4_hdr(struct dst_entry *dst, struct sk_buff *skb, 299 __be32 saddr, __be32 daddr, __u8 proto, 300 __u8 tos, __u8 ttl, __be16 df, bool xnet) 301 { 302 struct iphdr *iph; 303 304 skb_scrub_packet(skb, xnet); 305 306 skb_clear_hash(skb); 307 skb_dst_set(skb, dst); 308 memset(IPCB(skb), 0, sizeof(*IPCB(skb))); 309 310 skb_push(skb, sizeof(struct iphdr)); 311 skb_reset_network_header(skb); 312 313 iph = ip_hdr(skb); 314 315 iph->version = IPVERSION; 316 iph->ihl = sizeof(struct iphdr) >> 2; 317 iph->frag_off = df; 318 iph->protocol = proto; 319 iph->tos = tos; 320 iph->daddr = daddr; 321 iph->saddr = saddr; 322 iph->ttl = ttl; 323 __ip_select_ident(dev_net(dst->dev), iph, 324 skb_shinfo(skb)->gso_segs ?: 1); 325 iph->tot_len = htons(skb->len); 326 ip_send_check(iph); 327 } 328 329 static void prepare_ipv6_hdr(struct dst_entry *dst, struct sk_buff *skb, 330 struct in6_addr *saddr, struct in6_addr *daddr, 331 __u8 proto, __u8 prio, __u8 ttl) 332 { 333 struct ipv6hdr *ip6h; 334 335 memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt)); 336 IPCB(skb)->flags &= ~(IPSKB_XFRM_TUNNEL_SIZE | IPSKB_XFRM_TRANSFORMED 337 | IPSKB_REROUTED); 338 skb_dst_set(skb, dst); 339 340 __skb_push(skb, sizeof(*ip6h)); 341 skb_reset_network_header(skb); 342 ip6h = ipv6_hdr(skb); 343 ip6_flow_hdr(ip6h, prio, htonl(0)); 344 ip6h->payload_len = htons(skb->len); 345 ip6h->nexthdr = proto; 346 ip6h->hop_limit = ttl; 347 ip6h->daddr = *daddr; 348 ip6h->saddr = *saddr; 349 ip6h->payload_len = htons(skb->len - sizeof(*ip6h)); 350 } 351 352 static int prepare4(struct rxe_dev *rxe, struct sk_buff *skb, struct rxe_av *av) 353 { 354 struct dst_entry *dst; 355 bool xnet = false; 356 __be16 df = htons(IP_DF); 357 struct in_addr *saddr = &av->sgid_addr._sockaddr_in.sin_addr; 358 struct in_addr *daddr = &av->dgid_addr._sockaddr_in.sin_addr; 359 struct rxe_pkt_info *pkt = SKB_TO_PKT(skb); 360 361 dst = rxe_find_route4(rxe->ndev, saddr, daddr); 362 if (!dst) { 363 pr_err("Host not reachable\n"); 364 return -EHOSTUNREACH; 365 } 366 367 if (!memcmp(saddr, daddr, sizeof(*daddr))) 368 pkt->mask |= RXE_LOOPBACK_MASK; 369 370 prepare_udp_hdr(skb, htons(RXE_ROCE_V2_SPORT), 371 htons(ROCE_V2_UDP_DPORT)); 372 373 prepare_ipv4_hdr(dst, skb, saddr->s_addr, daddr->s_addr, IPPROTO_UDP, 374 av->grh.traffic_class, av->grh.hop_limit, df, xnet); 375 return 0; 376 } 377 378 static int prepare6(struct rxe_dev *rxe, struct sk_buff *skb, struct rxe_av *av) 379 { 380 struct dst_entry *dst; 381 struct in6_addr *saddr = &av->sgid_addr._sockaddr_in6.sin6_addr; 382 struct in6_addr *daddr = &av->dgid_addr._sockaddr_in6.sin6_addr; 383 struct rxe_pkt_info *pkt = SKB_TO_PKT(skb); 384 385 dst = rxe_find_route6(rxe->ndev, saddr, daddr); 386 if (!dst) { 387 pr_err("Host not reachable\n"); 388 return -EHOSTUNREACH; 389 } 390 391 if (!memcmp(saddr, daddr, sizeof(*daddr))) 392 pkt->mask |= RXE_LOOPBACK_MASK; 393 394 prepare_udp_hdr(skb, htons(RXE_ROCE_V2_SPORT), 395 htons(ROCE_V2_UDP_DPORT)); 396 397 prepare_ipv6_hdr(dst, skb, saddr, daddr, IPPROTO_UDP, 398 av->grh.traffic_class, 399 av->grh.hop_limit); 400 return 0; 401 } 402 403 static int prepare(struct rxe_dev *rxe, struct rxe_pkt_info *pkt, 404 struct sk_buff *skb, u32 *crc) 405 { 406 int err = 0; 407 struct rxe_av *av = rxe_get_av(pkt); 408 409 if (av->network_type == RDMA_NETWORK_IPV4) 410 err = prepare4(rxe, skb, av); 411 else if (av->network_type == RDMA_NETWORK_IPV6) 412 err = prepare6(rxe, skb, av); 413 414 *crc = rxe_icrc_hdr(pkt, skb); 415 416 return err; 417 } 418 419 static void rxe_skb_tx_dtor(struct sk_buff *skb) 420 { 421 struct sock *sk = skb->sk; 422 struct rxe_qp *qp = sk->sk_user_data; 423 int skb_out = atomic_dec_return(&qp->skb_out); 424 425 if (unlikely(qp->need_req_skb && 426 skb_out < RXE_INFLIGHT_SKBS_PER_QP_LOW)) 427 rxe_run_task(&qp->req.task, 1); 428 } 429 430 static int send(struct rxe_dev *rxe, struct rxe_pkt_info *pkt, 431 struct sk_buff *skb) 432 { 433 struct sk_buff *nskb; 434 struct rxe_av *av; 435 int err; 436 437 av = rxe_get_av(pkt); 438 439 nskb = skb_clone(skb, GFP_ATOMIC); 440 if (!nskb) 441 return -ENOMEM; 442 443 nskb->destructor = rxe_skb_tx_dtor; 444 nskb->sk = pkt->qp->sk->sk; 445 446 if (av->network_type == RDMA_NETWORK_IPV4) { 447 err = ip_local_out(dev_net(skb_dst(skb)->dev), nskb->sk, nskb); 448 } else if (av->network_type == RDMA_NETWORK_IPV6) { 449 err = ip6_local_out(dev_net(skb_dst(skb)->dev), nskb->sk, nskb); 450 } else { 451 pr_err("Unknown layer 3 protocol: %d\n", av->network_type); 452 kfree_skb(nskb); 453 return -EINVAL; 454 } 455 456 if (unlikely(net_xmit_eval(err))) { 457 pr_debug("error sending packet: %d\n", err); 458 return -EAGAIN; 459 } 460 461 kfree_skb(skb); 462 463 return 0; 464 } 465 466 static int loopback(struct sk_buff *skb) 467 { 468 return rxe_rcv(skb); 469 } 470 471 static inline int addr_same(struct rxe_dev *rxe, struct rxe_av *av) 472 { 473 return rxe->port.port_guid == av->grh.dgid.global.interface_id; 474 } 475 476 static struct sk_buff *init_packet(struct rxe_dev *rxe, struct rxe_av *av, 477 int paylen, struct rxe_pkt_info *pkt) 478 { 479 unsigned int hdr_len; 480 struct sk_buff *skb; 481 482 if (av->network_type == RDMA_NETWORK_IPV4) 483 hdr_len = ETH_HLEN + sizeof(struct udphdr) + 484 sizeof(struct iphdr); 485 else 486 hdr_len = ETH_HLEN + sizeof(struct udphdr) + 487 sizeof(struct ipv6hdr); 488 489 skb = alloc_skb(paylen + hdr_len + LL_RESERVED_SPACE(rxe->ndev), 490 GFP_ATOMIC); 491 if (unlikely(!skb)) 492 return NULL; 493 494 skb_reserve(skb, hdr_len + LL_RESERVED_SPACE(rxe->ndev)); 495 496 skb->dev = rxe->ndev; 497 if (av->network_type == RDMA_NETWORK_IPV4) 498 skb->protocol = htons(ETH_P_IP); 499 else 500 skb->protocol = htons(ETH_P_IPV6); 501 502 pkt->rxe = rxe; 503 pkt->port_num = 1; 504 pkt->hdr = skb_put(skb, paylen); 505 pkt->mask |= RXE_GRH_MASK; 506 507 memset(pkt->hdr, 0, paylen); 508 509 return skb; 510 } 511 512 /* 513 * this is required by rxe_cfg to match rxe devices in 514 * /sys/class/infiniband up with their underlying ethernet devices 515 */ 516 static char *parent_name(struct rxe_dev *rxe, unsigned int port_num) 517 { 518 return rxe->ndev->name; 519 } 520 521 static enum rdma_link_layer link_layer(struct rxe_dev *rxe, 522 unsigned int port_num) 523 { 524 return IB_LINK_LAYER_ETHERNET; 525 } 526 527 static struct rxe_ifc_ops ifc_ops = { 528 .node_guid = node_guid, 529 .port_guid = port_guid, 530 .dma_device = dma_device, 531 .mcast_add = mcast_add, 532 .mcast_delete = mcast_delete, 533 .prepare = prepare, 534 .send = send, 535 .loopback = loopback, 536 .init_packet = init_packet, 537 .parent_name = parent_name, 538 .link_layer = link_layer, 539 }; 540 541 struct rxe_dev *rxe_net_add(struct net_device *ndev) 542 { 543 int err; 544 struct rxe_dev *rxe = NULL; 545 546 rxe = (struct rxe_dev *)ib_alloc_device(sizeof(*rxe)); 547 if (!rxe) 548 return NULL; 549 550 rxe->ifc_ops = &ifc_ops; 551 rxe->ndev = ndev; 552 553 err = rxe_add(rxe, ndev->mtu); 554 if (err) { 555 ib_dealloc_device(&rxe->ib_dev); 556 return NULL; 557 } 558 559 spin_lock_bh(&dev_list_lock); 560 list_add_tail(&rxe_dev_list, &rxe->list); 561 spin_unlock_bh(&dev_list_lock); 562 return rxe; 563 } 564 565 void rxe_remove_all(void) 566 { 567 spin_lock_bh(&dev_list_lock); 568 while (!list_empty(&rxe_dev_list)) { 569 struct rxe_dev *rxe = 570 list_first_entry(&rxe_dev_list, struct rxe_dev, list); 571 572 list_del(&rxe->list); 573 spin_unlock_bh(&dev_list_lock); 574 rxe_remove(rxe); 575 spin_lock_bh(&dev_list_lock); 576 } 577 spin_unlock_bh(&dev_list_lock); 578 } 579 EXPORT_SYMBOL(rxe_remove_all); 580 581 static void rxe_port_event(struct rxe_dev *rxe, 582 enum ib_event_type event) 583 { 584 struct ib_event ev; 585 586 ev.device = &rxe->ib_dev; 587 ev.element.port_num = 1; 588 ev.event = event; 589 590 ib_dispatch_event(&ev); 591 } 592 593 /* Caller must hold net_info_lock */ 594 void rxe_port_up(struct rxe_dev *rxe) 595 { 596 struct rxe_port *port; 597 598 port = &rxe->port; 599 port->attr.state = IB_PORT_ACTIVE; 600 port->attr.phys_state = IB_PHYS_STATE_LINK_UP; 601 602 rxe_port_event(rxe, IB_EVENT_PORT_ACTIVE); 603 pr_info("rxe: set %s active\n", rxe->ib_dev.name); 604 return; 605 } 606 607 /* Caller must hold net_info_lock */ 608 void rxe_port_down(struct rxe_dev *rxe) 609 { 610 struct rxe_port *port; 611 612 port = &rxe->port; 613 port->attr.state = IB_PORT_DOWN; 614 port->attr.phys_state = IB_PHYS_STATE_LINK_DOWN; 615 616 rxe_port_event(rxe, IB_EVENT_PORT_ERR); 617 pr_info("rxe: set %s down\n", rxe->ib_dev.name); 618 return; 619 } 620 621 static int rxe_notify(struct notifier_block *not_blk, 622 unsigned long event, 623 void *arg) 624 { 625 struct net_device *ndev = netdev_notifier_info_to_dev(arg); 626 struct rxe_dev *rxe = net_to_rxe(ndev); 627 628 if (!rxe) 629 goto out; 630 631 switch (event) { 632 case NETDEV_UNREGISTER: 633 list_del(&rxe->list); 634 rxe_remove(rxe); 635 break; 636 case NETDEV_UP: 637 rxe_port_up(rxe); 638 break; 639 case NETDEV_DOWN: 640 rxe_port_down(rxe); 641 break; 642 case NETDEV_CHANGEMTU: 643 pr_info("rxe: %s changed mtu to %d\n", ndev->name, ndev->mtu); 644 rxe_set_mtu(rxe, ndev->mtu); 645 break; 646 case NETDEV_REBOOT: 647 case NETDEV_CHANGE: 648 case NETDEV_GOING_DOWN: 649 case NETDEV_CHANGEADDR: 650 case NETDEV_CHANGENAME: 651 case NETDEV_FEAT_CHANGE: 652 default: 653 pr_info("rxe: ignoring netdev event = %ld for %s\n", 654 event, ndev->name); 655 break; 656 } 657 out: 658 return NOTIFY_OK; 659 } 660 661 static struct notifier_block rxe_net_notifier = { 662 .notifier_call = rxe_notify, 663 }; 664 665 int rxe_net_init(void) 666 { 667 int err; 668 669 spin_lock_init(&dev_list_lock); 670 671 recv_sockets.sk6 = rxe_setup_udp_tunnel(&init_net, 672 htons(ROCE_V2_UDP_DPORT), true); 673 if (IS_ERR(recv_sockets.sk6)) { 674 recv_sockets.sk6 = NULL; 675 pr_err("rxe: Failed to create IPv6 UDP tunnel\n"); 676 return -1; 677 } 678 679 recv_sockets.sk4 = rxe_setup_udp_tunnel(&init_net, 680 htons(ROCE_V2_UDP_DPORT), false); 681 if (IS_ERR(recv_sockets.sk4)) { 682 rxe_release_udp_tunnel(recv_sockets.sk6); 683 recv_sockets.sk4 = NULL; 684 recv_sockets.sk6 = NULL; 685 pr_err("rxe: Failed to create IPv4 UDP tunnel\n"); 686 return -1; 687 } 688 689 err = register_netdevice_notifier(&rxe_net_notifier); 690 if (err) { 691 rxe_release_udp_tunnel(recv_sockets.sk6); 692 rxe_release_udp_tunnel(recv_sockets.sk4); 693 pr_err("rxe: Failed to rigister netdev notifier\n"); 694 } 695 696 return err; 697 } 698 699 void rxe_net_exit(void) 700 { 701 if (recv_sockets.sk6) 702 rxe_release_udp_tunnel(recv_sockets.sk6); 703 704 if (recv_sockets.sk4) 705 rxe_release_udp_tunnel(recv_sockets.sk4); 706 707 unregister_netdevice_notifier(&rxe_net_notifier); 708 } 709