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 void rxe_release_udp_tunnel(struct socket *sk) 279 { 280 if (sk) 281 udp_tunnel_sock_release(sk); 282 } 283 284 static void prepare_udp_hdr(struct sk_buff *skb, __be16 src_port, 285 __be16 dst_port) 286 { 287 struct udphdr *udph; 288 289 __skb_push(skb, sizeof(*udph)); 290 skb_reset_transport_header(skb); 291 udph = udp_hdr(skb); 292 293 udph->dest = dst_port; 294 udph->source = src_port; 295 udph->len = htons(skb->len); 296 udph->check = 0; 297 } 298 299 static void prepare_ipv4_hdr(struct dst_entry *dst, struct sk_buff *skb, 300 __be32 saddr, __be32 daddr, __u8 proto, 301 __u8 tos, __u8 ttl, __be16 df, bool xnet) 302 { 303 struct iphdr *iph; 304 305 skb_scrub_packet(skb, xnet); 306 307 skb_clear_hash(skb); 308 skb_dst_set(skb, dst); 309 memset(IPCB(skb), 0, sizeof(*IPCB(skb))); 310 311 skb_push(skb, sizeof(struct iphdr)); 312 skb_reset_network_header(skb); 313 314 iph = ip_hdr(skb); 315 316 iph->version = IPVERSION; 317 iph->ihl = sizeof(struct iphdr) >> 2; 318 iph->frag_off = df; 319 iph->protocol = proto; 320 iph->tos = tos; 321 iph->daddr = daddr; 322 iph->saddr = saddr; 323 iph->ttl = ttl; 324 __ip_select_ident(dev_net(dst->dev), iph, 325 skb_shinfo(skb)->gso_segs ?: 1); 326 iph->tot_len = htons(skb->len); 327 ip_send_check(iph); 328 } 329 330 static void prepare_ipv6_hdr(struct dst_entry *dst, struct sk_buff *skb, 331 struct in6_addr *saddr, struct in6_addr *daddr, 332 __u8 proto, __u8 prio, __u8 ttl) 333 { 334 struct ipv6hdr *ip6h; 335 336 memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt)); 337 IPCB(skb)->flags &= ~(IPSKB_XFRM_TUNNEL_SIZE | IPSKB_XFRM_TRANSFORMED 338 | IPSKB_REROUTED); 339 skb_dst_set(skb, dst); 340 341 __skb_push(skb, sizeof(*ip6h)); 342 skb_reset_network_header(skb); 343 ip6h = ipv6_hdr(skb); 344 ip6_flow_hdr(ip6h, prio, htonl(0)); 345 ip6h->payload_len = htons(skb->len); 346 ip6h->nexthdr = proto; 347 ip6h->hop_limit = ttl; 348 ip6h->daddr = *daddr; 349 ip6h->saddr = *saddr; 350 ip6h->payload_len = htons(skb->len - sizeof(*ip6h)); 351 } 352 353 static int prepare4(struct rxe_dev *rxe, struct rxe_pkt_info *pkt, 354 struct sk_buff *skb, struct rxe_av *av) 355 { 356 struct dst_entry *dst; 357 bool xnet = false; 358 __be16 df = htons(IP_DF); 359 struct in_addr *saddr = &av->sgid_addr._sockaddr_in.sin_addr; 360 struct in_addr *daddr = &av->dgid_addr._sockaddr_in.sin_addr; 361 362 dst = rxe_find_route4(rxe->ndev, saddr, daddr); 363 if (!dst) { 364 pr_err("Host not reachable\n"); 365 return -EHOSTUNREACH; 366 } 367 368 if (!memcmp(saddr, daddr, sizeof(*daddr))) 369 pkt->mask |= RXE_LOOPBACK_MASK; 370 371 prepare_udp_hdr(skb, htons(RXE_ROCE_V2_SPORT), 372 htons(ROCE_V2_UDP_DPORT)); 373 374 prepare_ipv4_hdr(dst, skb, saddr->s_addr, daddr->s_addr, IPPROTO_UDP, 375 av->grh.traffic_class, av->grh.hop_limit, df, xnet); 376 return 0; 377 } 378 379 static int prepare6(struct rxe_dev *rxe, struct rxe_pkt_info *pkt, 380 struct sk_buff *skb, struct rxe_av *av) 381 { 382 struct dst_entry *dst; 383 struct in6_addr *saddr = &av->sgid_addr._sockaddr_in6.sin6_addr; 384 struct in6_addr *daddr = &av->dgid_addr._sockaddr_in6.sin6_addr; 385 386 dst = rxe_find_route6(rxe->ndev, saddr, daddr); 387 if (!dst) { 388 pr_err("Host not reachable\n"); 389 return -EHOSTUNREACH; 390 } 391 392 if (!memcmp(saddr, daddr, sizeof(*daddr))) 393 pkt->mask |= RXE_LOOPBACK_MASK; 394 395 prepare_udp_hdr(skb, htons(RXE_ROCE_V2_SPORT), 396 htons(ROCE_V2_UDP_DPORT)); 397 398 prepare_ipv6_hdr(dst, skb, saddr, daddr, IPPROTO_UDP, 399 av->grh.traffic_class, 400 av->grh.hop_limit); 401 return 0; 402 } 403 404 static int prepare(struct rxe_dev *rxe, struct rxe_pkt_info *pkt, 405 struct sk_buff *skb, u32 *crc) 406 { 407 int err = 0; 408 struct rxe_av *av = rxe_get_av(pkt); 409 410 if (av->network_type == RDMA_NETWORK_IPV4) 411 err = prepare4(rxe, pkt, skb, av); 412 else if (av->network_type == RDMA_NETWORK_IPV6) 413 err = prepare6(rxe, pkt, skb, av); 414 415 *crc = rxe_icrc_hdr(pkt, skb); 416 417 return err; 418 } 419 420 static void rxe_skb_tx_dtor(struct sk_buff *skb) 421 { 422 struct sock *sk = skb->sk; 423 struct rxe_qp *qp = sk->sk_user_data; 424 int skb_out = atomic_dec_return(&qp->skb_out); 425 426 if (unlikely(qp->need_req_skb && 427 skb_out < RXE_INFLIGHT_SKBS_PER_QP_LOW)) 428 rxe_run_task(&qp->req.task, 1); 429 } 430 431 static int send(struct rxe_dev *rxe, struct rxe_pkt_info *pkt, 432 struct sk_buff *skb) 433 { 434 struct sk_buff *nskb; 435 struct rxe_av *av; 436 int err; 437 438 av = rxe_get_av(pkt); 439 440 nskb = skb_clone(skb, GFP_ATOMIC); 441 if (!nskb) 442 return -ENOMEM; 443 444 nskb->destructor = rxe_skb_tx_dtor; 445 nskb->sk = pkt->qp->sk->sk; 446 447 if (av->network_type == RDMA_NETWORK_IPV4) { 448 err = ip_local_out(dev_net(skb_dst(skb)->dev), nskb->sk, nskb); 449 } else if (av->network_type == RDMA_NETWORK_IPV6) { 450 err = ip6_local_out(dev_net(skb_dst(skb)->dev), nskb->sk, nskb); 451 } else { 452 pr_err("Unknown layer 3 protocol: %d\n", av->network_type); 453 kfree_skb(nskb); 454 return -EINVAL; 455 } 456 457 if (unlikely(net_xmit_eval(err))) { 458 pr_debug("error sending packet: %d\n", err); 459 return -EAGAIN; 460 } 461 462 kfree_skb(skb); 463 464 return 0; 465 } 466 467 static int loopback(struct sk_buff *skb) 468 { 469 return rxe_rcv(skb); 470 } 471 472 static inline int addr_same(struct rxe_dev *rxe, struct rxe_av *av) 473 { 474 return rxe->port.port_guid == av->grh.dgid.global.interface_id; 475 } 476 477 static struct sk_buff *init_packet(struct rxe_dev *rxe, struct rxe_av *av, 478 int paylen, struct rxe_pkt_info *pkt) 479 { 480 unsigned int hdr_len; 481 struct sk_buff *skb; 482 483 if (av->network_type == RDMA_NETWORK_IPV4) 484 hdr_len = ETH_HLEN + sizeof(struct udphdr) + 485 sizeof(struct iphdr); 486 else 487 hdr_len = ETH_HLEN + sizeof(struct udphdr) + 488 sizeof(struct ipv6hdr); 489 490 skb = alloc_skb(paylen + hdr_len + LL_RESERVED_SPACE(rxe->ndev), 491 GFP_ATOMIC); 492 if (unlikely(!skb)) 493 return NULL; 494 495 skb_reserve(skb, hdr_len + LL_RESERVED_SPACE(rxe->ndev)); 496 497 skb->dev = rxe->ndev; 498 if (av->network_type == RDMA_NETWORK_IPV4) 499 skb->protocol = htons(ETH_P_IP); 500 else 501 skb->protocol = htons(ETH_P_IPV6); 502 503 pkt->rxe = rxe; 504 pkt->port_num = 1; 505 pkt->hdr = skb_put(skb, paylen); 506 pkt->mask |= RXE_GRH_MASK; 507 508 memset(pkt->hdr, 0, paylen); 509 510 return skb; 511 } 512 513 /* 514 * this is required by rxe_cfg to match rxe devices in 515 * /sys/class/infiniband up with their underlying ethernet devices 516 */ 517 static char *parent_name(struct rxe_dev *rxe, unsigned int port_num) 518 { 519 return rxe->ndev->name; 520 } 521 522 static enum rdma_link_layer link_layer(struct rxe_dev *rxe, 523 unsigned int port_num) 524 { 525 return IB_LINK_LAYER_ETHERNET; 526 } 527 528 static struct rxe_ifc_ops ifc_ops = { 529 .node_guid = node_guid, 530 .port_guid = port_guid, 531 .dma_device = dma_device, 532 .mcast_add = mcast_add, 533 .mcast_delete = mcast_delete, 534 .prepare = prepare, 535 .send = send, 536 .loopback = loopback, 537 .init_packet = init_packet, 538 .parent_name = parent_name, 539 .link_layer = link_layer, 540 }; 541 542 struct rxe_dev *rxe_net_add(struct net_device *ndev) 543 { 544 int err; 545 struct rxe_dev *rxe = NULL; 546 547 rxe = (struct rxe_dev *)ib_alloc_device(sizeof(*rxe)); 548 if (!rxe) 549 return NULL; 550 551 rxe->ifc_ops = &ifc_ops; 552 rxe->ndev = ndev; 553 554 err = rxe_add(rxe, ndev->mtu); 555 if (err) { 556 ib_dealloc_device(&rxe->ib_dev); 557 return NULL; 558 } 559 560 spin_lock_bh(&dev_list_lock); 561 list_add_tail(&rxe_dev_list, &rxe->list); 562 spin_unlock_bh(&dev_list_lock); 563 return rxe; 564 } 565 566 void rxe_remove_all(void) 567 { 568 spin_lock_bh(&dev_list_lock); 569 while (!list_empty(&rxe_dev_list)) { 570 struct rxe_dev *rxe = 571 list_first_entry(&rxe_dev_list, struct rxe_dev, list); 572 573 list_del(&rxe->list); 574 spin_unlock_bh(&dev_list_lock); 575 rxe_remove(rxe); 576 spin_lock_bh(&dev_list_lock); 577 } 578 spin_unlock_bh(&dev_list_lock); 579 } 580 EXPORT_SYMBOL(rxe_remove_all); 581 582 static void rxe_port_event(struct rxe_dev *rxe, 583 enum ib_event_type event) 584 { 585 struct ib_event ev; 586 587 ev.device = &rxe->ib_dev; 588 ev.element.port_num = 1; 589 ev.event = event; 590 591 ib_dispatch_event(&ev); 592 } 593 594 /* Caller must hold net_info_lock */ 595 void rxe_port_up(struct rxe_dev *rxe) 596 { 597 struct rxe_port *port; 598 599 port = &rxe->port; 600 port->attr.state = IB_PORT_ACTIVE; 601 port->attr.phys_state = IB_PHYS_STATE_LINK_UP; 602 603 rxe_port_event(rxe, IB_EVENT_PORT_ACTIVE); 604 pr_info("set %s active\n", rxe->ib_dev.name); 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("set %s down\n", rxe->ib_dev.name); 618 } 619 620 static int rxe_notify(struct notifier_block *not_blk, 621 unsigned long event, 622 void *arg) 623 { 624 struct net_device *ndev = netdev_notifier_info_to_dev(arg); 625 struct rxe_dev *rxe = net_to_rxe(ndev); 626 627 if (!rxe) 628 goto out; 629 630 switch (event) { 631 case NETDEV_UNREGISTER: 632 list_del(&rxe->list); 633 rxe_remove(rxe); 634 break; 635 case NETDEV_UP: 636 rxe_port_up(rxe); 637 break; 638 case NETDEV_DOWN: 639 rxe_port_down(rxe); 640 break; 641 case NETDEV_CHANGEMTU: 642 pr_info("%s changed mtu to %d\n", ndev->name, ndev->mtu); 643 rxe_set_mtu(rxe, ndev->mtu); 644 break; 645 case NETDEV_REBOOT: 646 case NETDEV_CHANGE: 647 case NETDEV_GOING_DOWN: 648 case NETDEV_CHANGEADDR: 649 case NETDEV_CHANGENAME: 650 case NETDEV_FEAT_CHANGE: 651 default: 652 pr_info("ignoring netdev event = %ld for %s\n", 653 event, ndev->name); 654 break; 655 } 656 out: 657 return NOTIFY_OK; 658 } 659 660 struct notifier_block rxe_net_notifier = { 661 .notifier_call = rxe_notify, 662 }; 663 664 int rxe_net_ipv4_init(void) 665 { 666 spin_lock_init(&dev_list_lock); 667 668 recv_sockets.sk4 = rxe_setup_udp_tunnel(&init_net, 669 htons(ROCE_V2_UDP_DPORT), false); 670 if (IS_ERR(recv_sockets.sk4)) { 671 recv_sockets.sk4 = NULL; 672 pr_err("Failed to create IPv4 UDP tunnel\n"); 673 return -1; 674 } 675 676 return 0; 677 } 678 679 int rxe_net_ipv6_init(void) 680 { 681 #if IS_ENABLED(CONFIG_IPV6) 682 683 spin_lock_init(&dev_list_lock); 684 685 recv_sockets.sk6 = rxe_setup_udp_tunnel(&init_net, 686 htons(ROCE_V2_UDP_DPORT), true); 687 if (IS_ERR(recv_sockets.sk6)) { 688 recv_sockets.sk6 = NULL; 689 pr_err("Failed to create IPv6 UDP tunnel\n"); 690 return -1; 691 } 692 #endif 693 return 0; 694 } 695 696 void rxe_net_exit(void) 697 { 698 rxe_release_udp_tunnel(recv_sockets.sk6); 699 rxe_release_udp_tunnel(recv_sockets.sk4); 700 unregister_netdevice_notifier(&rxe_net_notifier); 701 } 702 703 int rxe_net_init(void) 704 { 705 int err; 706 707 recv_sockets.sk6 = NULL; 708 709 err = rxe_net_ipv4_init(); 710 if (err) 711 return err; 712 err = rxe_net_ipv6_init(); 713 if (err) 714 goto err_out; 715 err = register_netdevice_notifier(&rxe_net_notifier); 716 if (err) { 717 pr_err("Failed to register netdev notifier\n"); 718 goto err_out; 719 } 720 return 0; 721 err_out: 722 rxe_net_exit(); 723 return err; 724 } 725