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, 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 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 rxe_dev *rxe, 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(rxe->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(rxe->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 } 219 220 return dst; 221 } 222 223 static int rxe_udp_encap_recv(struct sock *sk, struct sk_buff *skb) 224 { 225 struct udphdr *udph; 226 struct net_device *ndev = skb->dev; 227 struct rxe_dev *rxe = net_to_rxe(ndev); 228 struct rxe_pkt_info *pkt = SKB_TO_PKT(skb); 229 230 if (!rxe) 231 goto drop; 232 233 if (skb_linearize(skb)) { 234 pr_err("skb_linearize failed\n"); 235 goto drop; 236 } 237 238 udph = udp_hdr(skb); 239 pkt->rxe = rxe; 240 pkt->port_num = 1; 241 pkt->hdr = (u8 *)(udph + 1); 242 pkt->mask = RXE_GRH_MASK; 243 pkt->paylen = be16_to_cpu(udph->len) - sizeof(*udph); 244 245 return rxe_rcv(skb); 246 drop: 247 kfree_skb(skb); 248 return 0; 249 } 250 251 static struct socket *rxe_setup_udp_tunnel(struct net *net, __be16 port, 252 bool ipv6) 253 { 254 int err; 255 struct socket *sock; 256 struct udp_port_cfg udp_cfg = { }; 257 struct udp_tunnel_sock_cfg tnl_cfg = { }; 258 259 if (ipv6) { 260 udp_cfg.family = AF_INET6; 261 udp_cfg.ipv6_v6only = 1; 262 } else { 263 udp_cfg.family = AF_INET; 264 } 265 266 udp_cfg.local_udp_port = port; 267 268 /* Create UDP socket */ 269 err = udp_sock_create(net, &udp_cfg, &sock); 270 if (err < 0) { 271 pr_err("failed to create udp socket. err = %d\n", err); 272 return ERR_PTR(err); 273 } 274 275 tnl_cfg.encap_type = 1; 276 tnl_cfg.encap_rcv = rxe_udp_encap_recv; 277 278 /* Setup UDP tunnel */ 279 setup_udp_tunnel_sock(net, sock, &tnl_cfg); 280 281 return sock; 282 } 283 284 void rxe_release_udp_tunnel(struct socket *sk) 285 { 286 if (sk) 287 udp_tunnel_sock_release(sk); 288 } 289 290 static void prepare_udp_hdr(struct sk_buff *skb, __be16 src_port, 291 __be16 dst_port) 292 { 293 struct udphdr *udph; 294 295 __skb_push(skb, sizeof(*udph)); 296 skb_reset_transport_header(skb); 297 udph = udp_hdr(skb); 298 299 udph->dest = dst_port; 300 udph->source = src_port; 301 udph->len = htons(skb->len); 302 udph->check = 0; 303 } 304 305 static void prepare_ipv4_hdr(struct dst_entry *dst, struct sk_buff *skb, 306 __be32 saddr, __be32 daddr, __u8 proto, 307 __u8 tos, __u8 ttl, __be16 df, bool xnet) 308 { 309 struct iphdr *iph; 310 311 skb_scrub_packet(skb, xnet); 312 313 skb_clear_hash(skb); 314 skb_dst_set(skb, dst_clone(dst)); 315 memset(IPCB(skb), 0, sizeof(*IPCB(skb))); 316 317 skb_push(skb, sizeof(struct iphdr)); 318 skb_reset_network_header(skb); 319 320 iph = ip_hdr(skb); 321 322 iph->version = IPVERSION; 323 iph->ihl = sizeof(struct iphdr) >> 2; 324 iph->frag_off = df; 325 iph->protocol = proto; 326 iph->tos = tos; 327 iph->daddr = daddr; 328 iph->saddr = saddr; 329 iph->ttl = ttl; 330 __ip_select_ident(dev_net(dst->dev), iph, 331 skb_shinfo(skb)->gso_segs ?: 1); 332 iph->tot_len = htons(skb->len); 333 ip_send_check(iph); 334 } 335 336 static void prepare_ipv6_hdr(struct dst_entry *dst, struct sk_buff *skb, 337 struct in6_addr *saddr, struct in6_addr *daddr, 338 __u8 proto, __u8 prio, __u8 ttl) 339 { 340 struct ipv6hdr *ip6h; 341 342 memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt)); 343 IPCB(skb)->flags &= ~(IPSKB_XFRM_TUNNEL_SIZE | IPSKB_XFRM_TRANSFORMED 344 | IPSKB_REROUTED); 345 skb_dst_set(skb, dst_clone(dst)); 346 347 __skb_push(skb, sizeof(*ip6h)); 348 skb_reset_network_header(skb); 349 ip6h = ipv6_hdr(skb); 350 ip6_flow_hdr(ip6h, prio, htonl(0)); 351 ip6h->payload_len = htons(skb->len); 352 ip6h->nexthdr = proto; 353 ip6h->hop_limit = ttl; 354 ip6h->daddr = *daddr; 355 ip6h->saddr = *saddr; 356 ip6h->payload_len = htons(skb->len - sizeof(*ip6h)); 357 } 358 359 static int prepare4(struct rxe_dev *rxe, struct rxe_pkt_info *pkt, 360 struct sk_buff *skb, struct rxe_av *av) 361 { 362 struct rxe_qp *qp = pkt->qp; 363 struct dst_entry *dst; 364 bool xnet = false; 365 __be16 df = htons(IP_DF); 366 struct in_addr *saddr = &av->sgid_addr._sockaddr_in.sin_addr; 367 struct in_addr *daddr = &av->dgid_addr._sockaddr_in.sin_addr; 368 369 dst = rxe_find_route(rxe, qp, av); 370 if (!dst) { 371 pr_err("Host not reachable\n"); 372 return -EHOSTUNREACH; 373 } 374 375 if (!memcmp(saddr, daddr, sizeof(*daddr))) 376 pkt->mask |= RXE_LOOPBACK_MASK; 377 378 prepare_udp_hdr(skb, htons(RXE_ROCE_V2_SPORT), 379 htons(ROCE_V2_UDP_DPORT)); 380 381 prepare_ipv4_hdr(dst, skb, saddr->s_addr, daddr->s_addr, IPPROTO_UDP, 382 av->grh.traffic_class, av->grh.hop_limit, df, xnet); 383 384 if (qp_type(qp) == IB_QPT_RC) 385 sk_dst_set(qp->sk->sk, dst); 386 else 387 dst_release(dst); 388 389 return 0; 390 } 391 392 static int prepare6(struct rxe_dev *rxe, struct rxe_pkt_info *pkt, 393 struct sk_buff *skb, struct rxe_av *av) 394 { 395 struct rxe_qp *qp = pkt->qp; 396 struct dst_entry *dst; 397 struct in6_addr *saddr = &av->sgid_addr._sockaddr_in6.sin6_addr; 398 struct in6_addr *daddr = &av->dgid_addr._sockaddr_in6.sin6_addr; 399 400 dst = rxe_find_route(rxe, qp, av); 401 if (!dst) { 402 pr_err("Host not reachable\n"); 403 return -EHOSTUNREACH; 404 } 405 406 if (!memcmp(saddr, daddr, sizeof(*daddr))) 407 pkt->mask |= RXE_LOOPBACK_MASK; 408 409 prepare_udp_hdr(skb, htons(RXE_ROCE_V2_SPORT), 410 htons(ROCE_V2_UDP_DPORT)); 411 412 prepare_ipv6_hdr(dst, skb, saddr, daddr, IPPROTO_UDP, 413 av->grh.traffic_class, 414 av->grh.hop_limit); 415 416 if (qp_type(qp) == IB_QPT_RC) 417 sk_dst_set(qp->sk->sk, dst); 418 else 419 dst_release(dst); 420 421 return 0; 422 } 423 424 int rxe_prepare(struct rxe_dev *rxe, struct rxe_pkt_info *pkt, 425 struct sk_buff *skb, u32 *crc) 426 { 427 int err = 0; 428 struct rxe_av *av = rxe_get_av(pkt); 429 430 if (av->network_type == RDMA_NETWORK_IPV4) 431 err = prepare4(rxe, pkt, skb, av); 432 else if (av->network_type == RDMA_NETWORK_IPV6) 433 err = prepare6(rxe, pkt, skb, av); 434 435 *crc = rxe_icrc_hdr(pkt, skb); 436 437 return err; 438 } 439 440 static void rxe_skb_tx_dtor(struct sk_buff *skb) 441 { 442 struct sock *sk = skb->sk; 443 struct rxe_qp *qp = sk->sk_user_data; 444 int skb_out = atomic_dec_return(&qp->skb_out); 445 446 if (unlikely(qp->need_req_skb && 447 skb_out < RXE_INFLIGHT_SKBS_PER_QP_LOW)) 448 rxe_run_task(&qp->req.task, 1); 449 450 rxe_drop_ref(qp); 451 } 452 453 int rxe_send(struct rxe_dev *rxe, struct rxe_pkt_info *pkt, struct sk_buff *skb) 454 { 455 struct sk_buff *nskb; 456 struct rxe_av *av; 457 int err; 458 459 av = rxe_get_av(pkt); 460 461 nskb = skb_clone(skb, GFP_ATOMIC); 462 if (!nskb) 463 return -ENOMEM; 464 465 nskb->destructor = rxe_skb_tx_dtor; 466 nskb->sk = pkt->qp->sk->sk; 467 468 rxe_add_ref(pkt->qp); 469 atomic_inc(&pkt->qp->skb_out); 470 471 if (av->network_type == RDMA_NETWORK_IPV4) { 472 err = ip_local_out(dev_net(skb_dst(skb)->dev), nskb->sk, nskb); 473 } else if (av->network_type == RDMA_NETWORK_IPV6) { 474 err = ip6_local_out(dev_net(skb_dst(skb)->dev), nskb->sk, nskb); 475 } else { 476 pr_err("Unknown layer 3 protocol: %d\n", av->network_type); 477 atomic_dec(&pkt->qp->skb_out); 478 rxe_drop_ref(pkt->qp); 479 kfree_skb(nskb); 480 return -EINVAL; 481 } 482 483 if (unlikely(net_xmit_eval(err))) { 484 pr_debug("error sending packet: %d\n", err); 485 return -EAGAIN; 486 } 487 488 kfree_skb(skb); 489 return 0; 490 } 491 492 int rxe_loopback(struct sk_buff *skb) 493 { 494 return rxe_rcv(skb); 495 } 496 497 static inline int addr_same(struct rxe_dev *rxe, struct rxe_av *av) 498 { 499 return rxe->port.port_guid == av->grh.dgid.global.interface_id; 500 } 501 502 struct sk_buff *rxe_init_packet(struct rxe_dev *rxe, struct rxe_av *av, 503 int paylen, struct rxe_pkt_info *pkt) 504 { 505 unsigned int hdr_len; 506 struct sk_buff *skb; 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(rxe->ndev), 516 GFP_ATOMIC); 517 if (unlikely(!skb)) 518 return NULL; 519 520 skb_reserve(skb, hdr_len + LL_RESERVED_SPACE(rxe->ndev)); 521 522 skb->dev = rxe->ndev; 523 if (av->network_type == RDMA_NETWORK_IPV4) 524 skb->protocol = htons(ETH_P_IP); 525 else 526 skb->protocol = htons(ETH_P_IPV6); 527 528 pkt->rxe = rxe; 529 pkt->port_num = 1; 530 pkt->hdr = skb_put(skb, paylen); 531 pkt->mask |= RXE_GRH_MASK; 532 533 memset(pkt->hdr, 0, paylen); 534 535 return skb; 536 } 537 538 /* 539 * this is required by rxe_cfg to match rxe devices in 540 * /sys/class/infiniband up with their underlying ethernet devices 541 */ 542 const char *rxe_parent_name(struct rxe_dev *rxe, unsigned int port_num) 543 { 544 return rxe->ndev->name; 545 } 546 547 enum rdma_link_layer rxe_link_layer(struct rxe_dev *rxe, unsigned int port_num) 548 { 549 return IB_LINK_LAYER_ETHERNET; 550 } 551 552 struct rxe_dev *rxe_net_add(struct net_device *ndev) 553 { 554 int err; 555 struct rxe_dev *rxe = NULL; 556 557 rxe = (struct rxe_dev *)ib_alloc_device(sizeof(*rxe)); 558 if (!rxe) 559 return NULL; 560 561 rxe->ndev = ndev; 562 563 err = rxe_add(rxe, ndev->mtu); 564 if (err) { 565 ib_dealloc_device(&rxe->ib_dev); 566 return NULL; 567 } 568 569 spin_lock_bh(&dev_list_lock); 570 list_add_tail(&rxe->list, &rxe_dev_list); 571 spin_unlock_bh(&dev_list_lock); 572 return rxe; 573 } 574 575 void rxe_remove_all(void) 576 { 577 spin_lock_bh(&dev_list_lock); 578 while (!list_empty(&rxe_dev_list)) { 579 struct rxe_dev *rxe = 580 list_first_entry(&rxe_dev_list, struct rxe_dev, list); 581 582 list_del(&rxe->list); 583 spin_unlock_bh(&dev_list_lock); 584 rxe_remove(rxe); 585 spin_lock_bh(&dev_list_lock); 586 } 587 spin_unlock_bh(&dev_list_lock); 588 } 589 EXPORT_SYMBOL(rxe_remove_all); 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 port->attr.phys_state = IB_PHYS_STATE_LINK_UP; 611 612 rxe_port_event(rxe, IB_EVENT_PORT_ACTIVE); 613 pr_info("set %s active\n", rxe->ib_dev.name); 614 } 615 616 /* Caller must hold net_info_lock */ 617 void rxe_port_down(struct rxe_dev *rxe) 618 { 619 struct rxe_port *port; 620 621 port = &rxe->port; 622 port->attr.state = IB_PORT_DOWN; 623 port->attr.phys_state = IB_PHYS_STATE_LINK_DOWN; 624 625 rxe_port_event(rxe, IB_EVENT_PORT_ERR); 626 pr_info("set %s down\n", rxe->ib_dev.name); 627 } 628 629 static int rxe_notify(struct notifier_block *not_blk, 630 unsigned long event, 631 void *arg) 632 { 633 struct net_device *ndev = netdev_notifier_info_to_dev(arg); 634 struct rxe_dev *rxe = net_to_rxe(ndev); 635 636 if (!rxe) 637 goto out; 638 639 switch (event) { 640 case NETDEV_UNREGISTER: 641 list_del(&rxe->list); 642 rxe_remove(rxe); 643 break; 644 case NETDEV_UP: 645 rxe_port_up(rxe); 646 break; 647 case NETDEV_DOWN: 648 rxe_port_down(rxe); 649 break; 650 case NETDEV_CHANGEMTU: 651 pr_info("%s changed mtu to %d\n", ndev->name, ndev->mtu); 652 rxe_set_mtu(rxe, ndev->mtu); 653 break; 654 case NETDEV_CHANGE: 655 if (netif_running(ndev) && netif_carrier_ok(ndev)) 656 rxe_port_up(rxe); 657 else 658 rxe_port_down(rxe); 659 break; 660 case NETDEV_REBOOT: 661 case NETDEV_GOING_DOWN: 662 case NETDEV_CHANGEADDR: 663 case NETDEV_CHANGENAME: 664 case NETDEV_FEAT_CHANGE: 665 default: 666 pr_info("ignoring netdev event = %ld for %s\n", 667 event, ndev->name); 668 break; 669 } 670 out: 671 return NOTIFY_OK; 672 } 673 674 struct notifier_block rxe_net_notifier = { 675 .notifier_call = rxe_notify, 676 }; 677 678 static int rxe_net_ipv4_init(void) 679 { 680 recv_sockets.sk4 = rxe_setup_udp_tunnel(&init_net, 681 htons(ROCE_V2_UDP_DPORT), false); 682 if (IS_ERR(recv_sockets.sk4)) { 683 recv_sockets.sk4 = NULL; 684 pr_err("Failed to create IPv4 UDP tunnel\n"); 685 return -1; 686 } 687 688 return 0; 689 } 690 691 static int rxe_net_ipv6_init(void) 692 { 693 #if IS_ENABLED(CONFIG_IPV6) 694 695 recv_sockets.sk6 = rxe_setup_udp_tunnel(&init_net, 696 htons(ROCE_V2_UDP_DPORT), true); 697 if (IS_ERR(recv_sockets.sk6)) { 698 recv_sockets.sk6 = NULL; 699 pr_err("Failed to create IPv6 UDP tunnel\n"); 700 return -1; 701 } 702 #endif 703 return 0; 704 } 705 706 void rxe_net_exit(void) 707 { 708 rxe_release_udp_tunnel(recv_sockets.sk6); 709 rxe_release_udp_tunnel(recv_sockets.sk4); 710 unregister_netdevice_notifier(&rxe_net_notifier); 711 } 712 713 int rxe_net_init(void) 714 { 715 int err; 716 717 recv_sockets.sk6 = NULL; 718 719 err = rxe_net_ipv4_init(); 720 if (err) 721 return err; 722 err = rxe_net_ipv6_init(); 723 if (err) 724 goto err_out; 725 err = register_netdevice_notifier(&rxe_net_notifier); 726 if (err) { 727 pr_err("Failed to register netdev notifier\n"); 728 goto err_out; 729 } 730 return 0; 731 err_out: 732 rxe_net_exit(); 733 return err; 734 } 735