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 DEFINE_SPINLOCK(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, dev_name(&rxe->ib_dev.dev))) { 76 found = rxe; 77 break; 78 } 79 } 80 spin_unlock_bh(&dev_list_lock); 81 return found; 82 } 83 84 85 static struct rxe_recv_sockets recv_sockets; 86 87 struct device *rxe_dma_device(struct rxe_dev *rxe) 88 { 89 struct net_device *ndev; 90 91 ndev = rxe->ndev; 92 93 if (is_vlan_dev(ndev)) 94 ndev = vlan_dev_real_dev(ndev); 95 96 return ndev->dev.parent; 97 } 98 99 int rxe_mcast_add(struct rxe_dev *rxe, union ib_gid *mgid) 100 { 101 int err; 102 unsigned char ll_addr[ETH_ALEN]; 103 104 ipv6_eth_mc_map((struct in6_addr *)mgid->raw, ll_addr); 105 err = dev_mc_add(rxe->ndev, ll_addr); 106 107 return err; 108 } 109 110 int rxe_mcast_delete(struct rxe_dev *rxe, union ib_gid *mgid) 111 { 112 int err; 113 unsigned char ll_addr[ETH_ALEN]; 114 115 ipv6_eth_mc_map((struct in6_addr *)mgid->raw, ll_addr); 116 err = dev_mc_del(rxe->ndev, ll_addr); 117 118 return err; 119 } 120 121 static struct dst_entry *rxe_find_route4(struct net_device *ndev, 122 struct in_addr *saddr, 123 struct in_addr *daddr) 124 { 125 struct rtable *rt; 126 struct flowi4 fl = { { 0 } }; 127 128 memset(&fl, 0, sizeof(fl)); 129 fl.flowi4_oif = ndev->ifindex; 130 memcpy(&fl.saddr, saddr, sizeof(*saddr)); 131 memcpy(&fl.daddr, daddr, sizeof(*daddr)); 132 fl.flowi4_proto = IPPROTO_UDP; 133 134 rt = ip_route_output_key(&init_net, &fl); 135 if (IS_ERR(rt)) { 136 pr_err_ratelimited("no route to %pI4\n", &daddr->s_addr); 137 return NULL; 138 } 139 140 return &rt->dst; 141 } 142 143 #if IS_ENABLED(CONFIG_IPV6) 144 static struct dst_entry *rxe_find_route6(struct net_device *ndev, 145 struct in6_addr *saddr, 146 struct in6_addr *daddr) 147 { 148 struct dst_entry *ndst; 149 struct flowi6 fl6 = { { 0 } }; 150 151 memset(&fl6, 0, sizeof(fl6)); 152 fl6.flowi6_oif = ndev->ifindex; 153 memcpy(&fl6.saddr, saddr, sizeof(*saddr)); 154 memcpy(&fl6.daddr, daddr, sizeof(*daddr)); 155 fl6.flowi6_proto = IPPROTO_UDP; 156 157 if (unlikely(ipv6_stub->ipv6_dst_lookup(sock_net(recv_sockets.sk6->sk), 158 recv_sockets.sk6->sk, &ndst, &fl6))) { 159 pr_err_ratelimited("no route to %pI6\n", daddr); 160 goto put; 161 } 162 163 if (unlikely(ndst->error)) { 164 pr_err("no route to %pI6\n", daddr); 165 goto put; 166 } 167 168 return ndst; 169 put: 170 dst_release(ndst); 171 return NULL; 172 } 173 174 #else 175 176 static struct dst_entry *rxe_find_route6(struct net_device *ndev, 177 struct in6_addr *saddr, 178 struct in6_addr *daddr) 179 { 180 return NULL; 181 } 182 183 #endif 184 185 static struct dst_entry *rxe_find_route(struct net_device *ndev, 186 struct rxe_qp *qp, 187 struct rxe_av *av) 188 { 189 struct dst_entry *dst = NULL; 190 191 if (qp_type(qp) == IB_QPT_RC) 192 dst = sk_dst_get(qp->sk->sk); 193 194 if (!dst || !dst_check(dst, qp->dst_cookie)) { 195 if (dst) 196 dst_release(dst); 197 198 if (av->network_type == RDMA_NETWORK_IPV4) { 199 struct in_addr *saddr; 200 struct in_addr *daddr; 201 202 saddr = &av->sgid_addr._sockaddr_in.sin_addr; 203 daddr = &av->dgid_addr._sockaddr_in.sin_addr; 204 dst = rxe_find_route4(ndev, saddr, daddr); 205 } else if (av->network_type == RDMA_NETWORK_IPV6) { 206 struct in6_addr *saddr6; 207 struct in6_addr *daddr6; 208 209 saddr6 = &av->sgid_addr._sockaddr_in6.sin6_addr; 210 daddr6 = &av->dgid_addr._sockaddr_in6.sin6_addr; 211 dst = rxe_find_route6(ndev, saddr6, daddr6); 212 #if IS_ENABLED(CONFIG_IPV6) 213 if (dst) 214 qp->dst_cookie = 215 rt6_get_cookie((struct rt6_info *)dst); 216 #endif 217 } 218 219 if (dst && (qp_type(qp) == IB_QPT_RC)) { 220 dst_hold(dst); 221 sk_dst_set(qp->sk->sk, dst); 222 } 223 } 224 return dst; 225 } 226 227 static int rxe_udp_encap_recv(struct sock *sk, struct sk_buff *skb) 228 { 229 struct udphdr *udph; 230 struct net_device *ndev = skb->dev; 231 struct net_device *rdev = ndev; 232 struct rxe_dev *rxe = net_to_rxe(ndev); 233 struct rxe_pkt_info *pkt = SKB_TO_PKT(skb); 234 235 if (!rxe && is_vlan_dev(rdev)) { 236 rdev = vlan_dev_real_dev(ndev); 237 rxe = net_to_rxe(rdev); 238 } 239 if (!rxe) 240 goto drop; 241 242 if (skb_linearize(skb)) { 243 pr_err("skb_linearize failed\n"); 244 goto drop; 245 } 246 247 udph = udp_hdr(skb); 248 pkt->rxe = rxe; 249 pkt->port_num = 1; 250 pkt->hdr = (u8 *)(udph + 1); 251 pkt->mask = RXE_GRH_MASK; 252 pkt->paylen = be16_to_cpu(udph->len) - sizeof(*udph); 253 254 rxe_rcv(skb); 255 256 return 0; 257 drop: 258 kfree_skb(skb); 259 260 return 0; 261 } 262 263 static struct socket *rxe_setup_udp_tunnel(struct net *net, __be16 port, 264 bool ipv6) 265 { 266 int err; 267 struct socket *sock; 268 struct udp_port_cfg udp_cfg = { }; 269 struct udp_tunnel_sock_cfg tnl_cfg = { }; 270 271 if (ipv6) { 272 udp_cfg.family = AF_INET6; 273 udp_cfg.ipv6_v6only = 1; 274 } else { 275 udp_cfg.family = AF_INET; 276 } 277 278 udp_cfg.local_udp_port = port; 279 280 /* Create UDP socket */ 281 err = udp_sock_create(net, &udp_cfg, &sock); 282 if (err < 0) { 283 pr_err("failed to create udp socket. err = %d\n", err); 284 return ERR_PTR(err); 285 } 286 287 tnl_cfg.encap_type = 1; 288 tnl_cfg.encap_rcv = rxe_udp_encap_recv; 289 290 /* Setup UDP tunnel */ 291 setup_udp_tunnel_sock(net, sock, &tnl_cfg); 292 293 return sock; 294 } 295 296 static void rxe_release_udp_tunnel(struct socket *sk) 297 { 298 if (sk) 299 udp_tunnel_sock_release(sk); 300 } 301 302 static void prepare_udp_hdr(struct sk_buff *skb, __be16 src_port, 303 __be16 dst_port) 304 { 305 struct udphdr *udph; 306 307 __skb_push(skb, sizeof(*udph)); 308 skb_reset_transport_header(skb); 309 udph = udp_hdr(skb); 310 311 udph->dest = dst_port; 312 udph->source = src_port; 313 udph->len = htons(skb->len); 314 udph->check = 0; 315 } 316 317 static void prepare_ipv4_hdr(struct dst_entry *dst, struct sk_buff *skb, 318 __be32 saddr, __be32 daddr, __u8 proto, 319 __u8 tos, __u8 ttl, __be16 df, bool xnet) 320 { 321 struct iphdr *iph; 322 323 skb_scrub_packet(skb, xnet); 324 325 skb_clear_hash(skb); 326 skb_dst_set(skb, dst_clone(dst)); 327 memset(IPCB(skb), 0, sizeof(*IPCB(skb))); 328 329 skb_push(skb, sizeof(struct iphdr)); 330 skb_reset_network_header(skb); 331 332 iph = ip_hdr(skb); 333 334 iph->version = IPVERSION; 335 iph->ihl = sizeof(struct iphdr) >> 2; 336 iph->frag_off = df; 337 iph->protocol = proto; 338 iph->tos = tos; 339 iph->daddr = daddr; 340 iph->saddr = saddr; 341 iph->ttl = ttl; 342 __ip_select_ident(dev_net(dst->dev), iph, 343 skb_shinfo(skb)->gso_segs ?: 1); 344 iph->tot_len = htons(skb->len); 345 ip_send_check(iph); 346 } 347 348 static void prepare_ipv6_hdr(struct dst_entry *dst, struct sk_buff *skb, 349 struct in6_addr *saddr, struct in6_addr *daddr, 350 __u8 proto, __u8 prio, __u8 ttl) 351 { 352 struct ipv6hdr *ip6h; 353 354 memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt)); 355 IPCB(skb)->flags &= ~(IPSKB_XFRM_TUNNEL_SIZE | IPSKB_XFRM_TRANSFORMED 356 | IPSKB_REROUTED); 357 skb_dst_set(skb, dst_clone(dst)); 358 359 __skb_push(skb, sizeof(*ip6h)); 360 skb_reset_network_header(skb); 361 ip6h = ipv6_hdr(skb); 362 ip6_flow_hdr(ip6h, prio, htonl(0)); 363 ip6h->payload_len = htons(skb->len); 364 ip6h->nexthdr = proto; 365 ip6h->hop_limit = ttl; 366 ip6h->daddr = *daddr; 367 ip6h->saddr = *saddr; 368 ip6h->payload_len = htons(skb->len - sizeof(*ip6h)); 369 } 370 371 static int prepare4(struct rxe_pkt_info *pkt, struct sk_buff *skb, 372 struct rxe_av *av) 373 { 374 struct rxe_qp *qp = pkt->qp; 375 struct dst_entry *dst; 376 bool xnet = false; 377 __be16 df = htons(IP_DF); 378 struct in_addr *saddr = &av->sgid_addr._sockaddr_in.sin_addr; 379 struct in_addr *daddr = &av->dgid_addr._sockaddr_in.sin_addr; 380 381 dst = rxe_find_route(skb->dev, qp, av); 382 if (!dst) { 383 pr_err("Host not reachable\n"); 384 return -EHOSTUNREACH; 385 } 386 387 if (!memcmp(saddr, daddr, sizeof(*daddr))) 388 pkt->mask |= RXE_LOOPBACK_MASK; 389 390 prepare_udp_hdr(skb, cpu_to_be16(qp->src_port), 391 cpu_to_be16(ROCE_V2_UDP_DPORT)); 392 393 prepare_ipv4_hdr(dst, skb, saddr->s_addr, daddr->s_addr, IPPROTO_UDP, 394 av->grh.traffic_class, av->grh.hop_limit, df, xnet); 395 396 dst_release(dst); 397 return 0; 398 } 399 400 static int prepare6(struct rxe_pkt_info *pkt, struct sk_buff *skb, 401 struct rxe_av *av) 402 { 403 struct rxe_qp *qp = pkt->qp; 404 struct dst_entry *dst; 405 struct in6_addr *saddr = &av->sgid_addr._sockaddr_in6.sin6_addr; 406 struct in6_addr *daddr = &av->dgid_addr._sockaddr_in6.sin6_addr; 407 408 dst = rxe_find_route(skb->dev, qp, av); 409 if (!dst) { 410 pr_err("Host not reachable\n"); 411 return -EHOSTUNREACH; 412 } 413 414 if (!memcmp(saddr, daddr, sizeof(*daddr))) 415 pkt->mask |= RXE_LOOPBACK_MASK; 416 417 prepare_udp_hdr(skb, cpu_to_be16(qp->src_port), 418 cpu_to_be16(ROCE_V2_UDP_DPORT)); 419 420 prepare_ipv6_hdr(dst, skb, saddr, daddr, IPPROTO_UDP, 421 av->grh.traffic_class, 422 av->grh.hop_limit); 423 424 dst_release(dst); 425 return 0; 426 } 427 428 int rxe_prepare(struct rxe_pkt_info *pkt, struct sk_buff *skb, u32 *crc) 429 { 430 int err = 0; 431 struct rxe_av *av = rxe_get_av(pkt); 432 433 if (av->network_type == RDMA_NETWORK_IPV4) 434 err = prepare4(pkt, skb, av); 435 else if (av->network_type == RDMA_NETWORK_IPV6) 436 err = prepare6(pkt, skb, av); 437 438 *crc = rxe_icrc_hdr(pkt, skb); 439 440 return err; 441 } 442 443 static void rxe_skb_tx_dtor(struct sk_buff *skb) 444 { 445 struct sock *sk = skb->sk; 446 struct rxe_qp *qp = sk->sk_user_data; 447 int skb_out = atomic_dec_return(&qp->skb_out); 448 449 if (unlikely(qp->need_req_skb && 450 skb_out < RXE_INFLIGHT_SKBS_PER_QP_LOW)) 451 rxe_run_task(&qp->req.task, 1); 452 453 rxe_drop_ref(qp); 454 } 455 456 int rxe_send(struct rxe_pkt_info *pkt, struct sk_buff *skb) 457 { 458 struct rxe_av *av; 459 int err; 460 461 av = rxe_get_av(pkt); 462 463 skb->destructor = rxe_skb_tx_dtor; 464 skb->sk = pkt->qp->sk->sk; 465 466 rxe_add_ref(pkt->qp); 467 atomic_inc(&pkt->qp->skb_out); 468 469 if (av->network_type == RDMA_NETWORK_IPV4) { 470 err = ip_local_out(dev_net(skb_dst(skb)->dev), skb->sk, skb); 471 } else if (av->network_type == RDMA_NETWORK_IPV6) { 472 err = ip6_local_out(dev_net(skb_dst(skb)->dev), skb->sk, skb); 473 } else { 474 pr_err("Unknown layer 3 protocol: %d\n", av->network_type); 475 atomic_dec(&pkt->qp->skb_out); 476 rxe_drop_ref(pkt->qp); 477 kfree_skb(skb); 478 return -EINVAL; 479 } 480 481 if (unlikely(net_xmit_eval(err))) { 482 pr_debug("error sending packet: %d\n", err); 483 return -EAGAIN; 484 } 485 486 return 0; 487 } 488 489 void rxe_loopback(struct sk_buff *skb) 490 { 491 rxe_rcv(skb); 492 } 493 494 struct sk_buff *rxe_init_packet(struct rxe_dev *rxe, struct rxe_av *av, 495 int paylen, struct rxe_pkt_info *pkt) 496 { 497 unsigned int hdr_len; 498 struct sk_buff *skb; 499 struct net_device *ndev; 500 const struct ib_gid_attr *attr; 501 const int port_num = 1; 502 503 attr = rdma_get_gid_attr(&rxe->ib_dev, port_num, av->grh.sgid_index); 504 if (IS_ERR(attr)) 505 return NULL; 506 ndev = attr->ndev; 507 508 if (av->network_type == RDMA_NETWORK_IPV4) 509 hdr_len = ETH_HLEN + sizeof(struct udphdr) + 510 sizeof(struct iphdr); 511 else 512 hdr_len = ETH_HLEN + sizeof(struct udphdr) + 513 sizeof(struct ipv6hdr); 514 515 skb = alloc_skb(paylen + hdr_len + LL_RESERVED_SPACE(ndev), 516 GFP_ATOMIC); 517 518 if (unlikely(!skb)) 519 goto out; 520 521 skb_reserve(skb, hdr_len + LL_RESERVED_SPACE(rxe->ndev)); 522 523 skb->dev = ndev; 524 if (av->network_type == RDMA_NETWORK_IPV4) 525 skb->protocol = htons(ETH_P_IP); 526 else 527 skb->protocol = htons(ETH_P_IPV6); 528 529 pkt->rxe = rxe; 530 pkt->port_num = port_num; 531 pkt->hdr = skb_put_zero(skb, paylen); 532 pkt->mask |= RXE_GRH_MASK; 533 534 out: 535 rdma_put_gid_attr(attr); 536 return skb; 537 } 538 539 /* 540 * this is required by rxe_cfg to match rxe devices in 541 * /sys/class/infiniband up with their underlying ethernet devices 542 */ 543 const char *rxe_parent_name(struct rxe_dev *rxe, unsigned int port_num) 544 { 545 return rxe->ndev->name; 546 } 547 548 enum rdma_link_layer rxe_link_layer(struct rxe_dev *rxe, unsigned int port_num) 549 { 550 return IB_LINK_LAYER_ETHERNET; 551 } 552 553 struct rxe_dev *rxe_net_add(struct net_device *ndev) 554 { 555 int err; 556 struct rxe_dev *rxe = NULL; 557 558 rxe = (struct rxe_dev *)ib_alloc_device(sizeof(*rxe)); 559 if (!rxe) 560 return NULL; 561 562 rxe->ndev = ndev; 563 564 err = rxe_add(rxe, ndev->mtu); 565 if (err) { 566 ib_dealloc_device(&rxe->ib_dev); 567 return NULL; 568 } 569 570 spin_lock_bh(&dev_list_lock); 571 list_add_tail(&rxe->list, &rxe_dev_list); 572 spin_unlock_bh(&dev_list_lock); 573 return rxe; 574 } 575 576 void rxe_remove_all(void) 577 { 578 spin_lock_bh(&dev_list_lock); 579 while (!list_empty(&rxe_dev_list)) { 580 struct rxe_dev *rxe = 581 list_first_entry(&rxe_dev_list, struct rxe_dev, list); 582 583 list_del(&rxe->list); 584 spin_unlock_bh(&dev_list_lock); 585 rxe_remove(rxe); 586 spin_lock_bh(&dev_list_lock); 587 } 588 spin_unlock_bh(&dev_list_lock); 589 } 590 591 static void rxe_port_event(struct rxe_dev *rxe, 592 enum ib_event_type event) 593 { 594 struct ib_event ev; 595 596 ev.device = &rxe->ib_dev; 597 ev.element.port_num = 1; 598 ev.event = event; 599 600 ib_dispatch_event(&ev); 601 } 602 603 /* Caller must hold net_info_lock */ 604 void rxe_port_up(struct rxe_dev *rxe) 605 { 606 struct rxe_port *port; 607 608 port = &rxe->port; 609 port->attr.state = IB_PORT_ACTIVE; 610 611 rxe_port_event(rxe, IB_EVENT_PORT_ACTIVE); 612 dev_info(&rxe->ib_dev.dev, "set active\n"); 613 } 614 615 /* Caller must hold net_info_lock */ 616 void rxe_port_down(struct rxe_dev *rxe) 617 { 618 struct rxe_port *port; 619 620 port = &rxe->port; 621 port->attr.state = IB_PORT_DOWN; 622 623 rxe_port_event(rxe, IB_EVENT_PORT_ERR); 624 rxe_counter_inc(rxe, RXE_CNT_LINK_DOWNED); 625 dev_info(&rxe->ib_dev.dev, "set down\n"); 626 } 627 628 void rxe_set_port_state(struct rxe_dev *rxe) 629 { 630 if (netif_running(rxe->ndev) && netif_carrier_ok(rxe->ndev)) 631 rxe_port_up(rxe); 632 else 633 rxe_port_down(rxe); 634 } 635 636 static int rxe_notify(struct notifier_block *not_blk, 637 unsigned long event, 638 void *arg) 639 { 640 struct net_device *ndev = netdev_notifier_info_to_dev(arg); 641 struct rxe_dev *rxe = net_to_rxe(ndev); 642 643 if (!rxe) 644 goto out; 645 646 switch (event) { 647 case NETDEV_UNREGISTER: 648 list_del(&rxe->list); 649 rxe_remove(rxe); 650 break; 651 case NETDEV_UP: 652 rxe_port_up(rxe); 653 break; 654 case NETDEV_DOWN: 655 rxe_port_down(rxe); 656 break; 657 case NETDEV_CHANGEMTU: 658 pr_info("%s changed mtu to %d\n", ndev->name, ndev->mtu); 659 rxe_set_mtu(rxe, ndev->mtu); 660 break; 661 case NETDEV_CHANGE: 662 rxe_set_port_state(rxe); 663 break; 664 case NETDEV_REBOOT: 665 case NETDEV_GOING_DOWN: 666 case NETDEV_CHANGEADDR: 667 case NETDEV_CHANGENAME: 668 case NETDEV_FEAT_CHANGE: 669 default: 670 pr_info("ignoring netdev event = %ld for %s\n", 671 event, ndev->name); 672 break; 673 } 674 out: 675 return NOTIFY_OK; 676 } 677 678 static struct notifier_block rxe_net_notifier = { 679 .notifier_call = rxe_notify, 680 }; 681 682 static int rxe_net_ipv4_init(void) 683 { 684 recv_sockets.sk4 = rxe_setup_udp_tunnel(&init_net, 685 htons(ROCE_V2_UDP_DPORT), false); 686 if (IS_ERR(recv_sockets.sk4)) { 687 recv_sockets.sk4 = NULL; 688 pr_err("Failed to create IPv4 UDP tunnel\n"); 689 return -1; 690 } 691 692 return 0; 693 } 694 695 static int rxe_net_ipv6_init(void) 696 { 697 #if IS_ENABLED(CONFIG_IPV6) 698 699 recv_sockets.sk6 = rxe_setup_udp_tunnel(&init_net, 700 htons(ROCE_V2_UDP_DPORT), true); 701 if (IS_ERR(recv_sockets.sk6)) { 702 recv_sockets.sk6 = NULL; 703 pr_err("Failed to create IPv6 UDP tunnel\n"); 704 return -1; 705 } 706 #endif 707 return 0; 708 } 709 710 void rxe_net_exit(void) 711 { 712 rxe_release_udp_tunnel(recv_sockets.sk6); 713 rxe_release_udp_tunnel(recv_sockets.sk4); 714 unregister_netdevice_notifier(&rxe_net_notifier); 715 } 716 717 int rxe_net_init(void) 718 { 719 int err; 720 721 recv_sockets.sk6 = NULL; 722 723 err = rxe_net_ipv4_init(); 724 if (err) 725 return err; 726 err = rxe_net_ipv6_init(); 727 if (err) 728 goto err_out; 729 err = register_netdevice_notifier(&rxe_net_notifier); 730 if (err) { 731 pr_err("Failed to register netdev notifier\n"); 732 goto err_out; 733 } 734 return 0; 735 err_out: 736 rxe_net_exit(); 737 return err; 738 } 739