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 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 /* 186 * Derive the net_device from the av. 187 * For physical devices, this will just return rxe->ndev. 188 * But for VLAN devices, it will return the vlan dev. 189 * Caller should dev_put() the returned net_device. 190 */ 191 static struct net_device *rxe_netdev_from_av(struct rxe_dev *rxe, 192 int port_num, 193 struct rxe_av *av) 194 { 195 union ib_gid gid; 196 struct ib_gid_attr attr; 197 struct net_device *ndev = rxe->ndev; 198 199 if (ib_get_cached_gid(&rxe->ib_dev, port_num, av->grh.sgid_index, 200 &gid, &attr) == 0 && 201 attr.ndev && attr.ndev != ndev) 202 ndev = attr.ndev; 203 else 204 /* Only to ensure that caller may call dev_put() */ 205 dev_hold(ndev); 206 207 return ndev; 208 } 209 210 static struct dst_entry *rxe_find_route(struct rxe_dev *rxe, 211 struct rxe_qp *qp, 212 struct rxe_av *av) 213 { 214 struct dst_entry *dst = NULL; 215 struct net_device *ndev; 216 217 ndev = rxe_netdev_from_av(rxe, qp->attr.port_num, av); 218 219 if (qp_type(qp) == IB_QPT_RC) 220 dst = sk_dst_get(qp->sk->sk); 221 222 if (!dst || !dst_check(dst, qp->dst_cookie)) { 223 if (dst) 224 dst_release(dst); 225 226 if (av->network_type == RDMA_NETWORK_IPV4) { 227 struct in_addr *saddr; 228 struct in_addr *daddr; 229 230 saddr = &av->sgid_addr._sockaddr_in.sin_addr; 231 daddr = &av->dgid_addr._sockaddr_in.sin_addr; 232 dst = rxe_find_route4(ndev, saddr, daddr); 233 } else if (av->network_type == RDMA_NETWORK_IPV6) { 234 struct in6_addr *saddr6; 235 struct in6_addr *daddr6; 236 237 saddr6 = &av->sgid_addr._sockaddr_in6.sin6_addr; 238 daddr6 = &av->dgid_addr._sockaddr_in6.sin6_addr; 239 dst = rxe_find_route6(ndev, saddr6, daddr6); 240 #if IS_ENABLED(CONFIG_IPV6) 241 if (dst) 242 qp->dst_cookie = 243 rt6_get_cookie((struct rt6_info *)dst); 244 #endif 245 } 246 } 247 248 dev_put(ndev); 249 return dst; 250 } 251 252 static int rxe_udp_encap_recv(struct sock *sk, struct sk_buff *skb) 253 { 254 struct udphdr *udph; 255 struct net_device *ndev = skb->dev; 256 struct net_device *rdev = ndev; 257 struct rxe_dev *rxe = net_to_rxe(ndev); 258 struct rxe_pkt_info *pkt = SKB_TO_PKT(skb); 259 260 if (!rxe && is_vlan_dev(rdev)) { 261 rdev = vlan_dev_real_dev(ndev); 262 rxe = net_to_rxe(rdev); 263 } 264 if (!rxe) 265 goto drop; 266 267 if (skb_linearize(skb)) { 268 pr_err("skb_linearize failed\n"); 269 goto drop; 270 } 271 272 udph = udp_hdr(skb); 273 pkt->rxe = rxe; 274 pkt->port_num = 1; 275 pkt->hdr = (u8 *)(udph + 1); 276 pkt->mask = RXE_GRH_MASK; 277 pkt->paylen = be16_to_cpu(udph->len) - sizeof(*udph); 278 279 return rxe_rcv(skb); 280 drop: 281 kfree_skb(skb); 282 return 0; 283 } 284 285 static struct socket *rxe_setup_udp_tunnel(struct net *net, __be16 port, 286 bool ipv6) 287 { 288 int err; 289 struct socket *sock; 290 struct udp_port_cfg udp_cfg = { }; 291 struct udp_tunnel_sock_cfg tnl_cfg = { }; 292 293 if (ipv6) { 294 udp_cfg.family = AF_INET6; 295 udp_cfg.ipv6_v6only = 1; 296 } else { 297 udp_cfg.family = AF_INET; 298 } 299 300 udp_cfg.local_udp_port = port; 301 302 /* Create UDP socket */ 303 err = udp_sock_create(net, &udp_cfg, &sock); 304 if (err < 0) { 305 pr_err("failed to create udp socket. err = %d\n", err); 306 return ERR_PTR(err); 307 } 308 309 tnl_cfg.encap_type = 1; 310 tnl_cfg.encap_rcv = rxe_udp_encap_recv; 311 312 /* Setup UDP tunnel */ 313 setup_udp_tunnel_sock(net, sock, &tnl_cfg); 314 315 return sock; 316 } 317 318 void rxe_release_udp_tunnel(struct socket *sk) 319 { 320 if (sk) 321 udp_tunnel_sock_release(sk); 322 } 323 324 static void prepare_udp_hdr(struct sk_buff *skb, __be16 src_port, 325 __be16 dst_port) 326 { 327 struct udphdr *udph; 328 329 __skb_push(skb, sizeof(*udph)); 330 skb_reset_transport_header(skb); 331 udph = udp_hdr(skb); 332 333 udph->dest = dst_port; 334 udph->source = src_port; 335 udph->len = htons(skb->len); 336 udph->check = 0; 337 } 338 339 static void prepare_ipv4_hdr(struct dst_entry *dst, struct sk_buff *skb, 340 __be32 saddr, __be32 daddr, __u8 proto, 341 __u8 tos, __u8 ttl, __be16 df, bool xnet) 342 { 343 struct iphdr *iph; 344 345 skb_scrub_packet(skb, xnet); 346 347 skb_clear_hash(skb); 348 skb_dst_set(skb, dst_clone(dst)); 349 memset(IPCB(skb), 0, sizeof(*IPCB(skb))); 350 351 skb_push(skb, sizeof(struct iphdr)); 352 skb_reset_network_header(skb); 353 354 iph = ip_hdr(skb); 355 356 iph->version = IPVERSION; 357 iph->ihl = sizeof(struct iphdr) >> 2; 358 iph->frag_off = df; 359 iph->protocol = proto; 360 iph->tos = tos; 361 iph->daddr = daddr; 362 iph->saddr = saddr; 363 iph->ttl = ttl; 364 __ip_select_ident(dev_net(dst->dev), iph, 365 skb_shinfo(skb)->gso_segs ?: 1); 366 iph->tot_len = htons(skb->len); 367 ip_send_check(iph); 368 } 369 370 static void prepare_ipv6_hdr(struct dst_entry *dst, struct sk_buff *skb, 371 struct in6_addr *saddr, struct in6_addr *daddr, 372 __u8 proto, __u8 prio, __u8 ttl) 373 { 374 struct ipv6hdr *ip6h; 375 376 memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt)); 377 IPCB(skb)->flags &= ~(IPSKB_XFRM_TUNNEL_SIZE | IPSKB_XFRM_TRANSFORMED 378 | IPSKB_REROUTED); 379 skb_dst_set(skb, dst_clone(dst)); 380 381 __skb_push(skb, sizeof(*ip6h)); 382 skb_reset_network_header(skb); 383 ip6h = ipv6_hdr(skb); 384 ip6_flow_hdr(ip6h, prio, htonl(0)); 385 ip6h->payload_len = htons(skb->len); 386 ip6h->nexthdr = proto; 387 ip6h->hop_limit = ttl; 388 ip6h->daddr = *daddr; 389 ip6h->saddr = *saddr; 390 ip6h->payload_len = htons(skb->len - sizeof(*ip6h)); 391 } 392 393 static int prepare4(struct rxe_dev *rxe, struct rxe_pkt_info *pkt, 394 struct sk_buff *skb, struct rxe_av *av) 395 { 396 struct rxe_qp *qp = pkt->qp; 397 struct dst_entry *dst; 398 bool xnet = false; 399 __be16 df = htons(IP_DF); 400 struct in_addr *saddr = &av->sgid_addr._sockaddr_in.sin_addr; 401 struct in_addr *daddr = &av->dgid_addr._sockaddr_in.sin_addr; 402 403 dst = rxe_find_route(rxe, qp, av); 404 if (!dst) { 405 pr_err("Host not reachable\n"); 406 return -EHOSTUNREACH; 407 } 408 409 if (!memcmp(saddr, daddr, sizeof(*daddr))) 410 pkt->mask |= RXE_LOOPBACK_MASK; 411 412 prepare_udp_hdr(skb, htons(RXE_ROCE_V2_SPORT), 413 htons(ROCE_V2_UDP_DPORT)); 414 415 prepare_ipv4_hdr(dst, skb, saddr->s_addr, daddr->s_addr, IPPROTO_UDP, 416 av->grh.traffic_class, av->grh.hop_limit, df, xnet); 417 418 if (qp_type(qp) == IB_QPT_RC) 419 sk_dst_set(qp->sk->sk, dst); 420 else 421 dst_release(dst); 422 423 return 0; 424 } 425 426 static int prepare6(struct rxe_dev *rxe, struct rxe_pkt_info *pkt, 427 struct sk_buff *skb, struct rxe_av *av) 428 { 429 struct rxe_qp *qp = pkt->qp; 430 struct dst_entry *dst; 431 struct in6_addr *saddr = &av->sgid_addr._sockaddr_in6.sin6_addr; 432 struct in6_addr *daddr = &av->dgid_addr._sockaddr_in6.sin6_addr; 433 434 dst = rxe_find_route(rxe, qp, av); 435 if (!dst) { 436 pr_err("Host not reachable\n"); 437 return -EHOSTUNREACH; 438 } 439 440 if (!memcmp(saddr, daddr, sizeof(*daddr))) 441 pkt->mask |= RXE_LOOPBACK_MASK; 442 443 prepare_udp_hdr(skb, htons(RXE_ROCE_V2_SPORT), 444 htons(ROCE_V2_UDP_DPORT)); 445 446 prepare_ipv6_hdr(dst, skb, saddr, daddr, IPPROTO_UDP, 447 av->grh.traffic_class, 448 av->grh.hop_limit); 449 450 if (qp_type(qp) == IB_QPT_RC) 451 sk_dst_set(qp->sk->sk, dst); 452 else 453 dst_release(dst); 454 455 return 0; 456 } 457 458 int rxe_prepare(struct rxe_dev *rxe, struct rxe_pkt_info *pkt, 459 struct sk_buff *skb, u32 *crc) 460 { 461 int err = 0; 462 struct rxe_av *av = rxe_get_av(pkt); 463 464 if (av->network_type == RDMA_NETWORK_IPV4) 465 err = prepare4(rxe, pkt, skb, av); 466 else if (av->network_type == RDMA_NETWORK_IPV6) 467 err = prepare6(rxe, pkt, skb, av); 468 469 *crc = rxe_icrc_hdr(pkt, skb); 470 471 return err; 472 } 473 474 static void rxe_skb_tx_dtor(struct sk_buff *skb) 475 { 476 struct sock *sk = skb->sk; 477 struct rxe_qp *qp = sk->sk_user_data; 478 int skb_out = atomic_dec_return(&qp->skb_out); 479 480 if (unlikely(qp->need_req_skb && 481 skb_out < RXE_INFLIGHT_SKBS_PER_QP_LOW)) 482 rxe_run_task(&qp->req.task, 1); 483 484 rxe_drop_ref(qp); 485 } 486 487 int rxe_send(struct rxe_pkt_info *pkt, struct sk_buff *skb) 488 { 489 struct rxe_av *av; 490 int err; 491 492 av = rxe_get_av(pkt); 493 494 skb->destructor = rxe_skb_tx_dtor; 495 skb->sk = pkt->qp->sk->sk; 496 497 rxe_add_ref(pkt->qp); 498 atomic_inc(&pkt->qp->skb_out); 499 500 if (av->network_type == RDMA_NETWORK_IPV4) { 501 err = ip_local_out(dev_net(skb_dst(skb)->dev), skb->sk, skb); 502 } else if (av->network_type == RDMA_NETWORK_IPV6) { 503 err = ip6_local_out(dev_net(skb_dst(skb)->dev), skb->sk, skb); 504 } else { 505 pr_err("Unknown layer 3 protocol: %d\n", av->network_type); 506 atomic_dec(&pkt->qp->skb_out); 507 rxe_drop_ref(pkt->qp); 508 kfree_skb(skb); 509 return -EINVAL; 510 } 511 512 if (unlikely(net_xmit_eval(err))) { 513 pr_debug("error sending packet: %d\n", err); 514 return -EAGAIN; 515 } 516 517 return 0; 518 } 519 520 int rxe_loopback(struct sk_buff *skb) 521 { 522 return rxe_rcv(skb); 523 } 524 525 static inline int addr_same(struct rxe_dev *rxe, struct rxe_av *av) 526 { 527 return rxe->port.port_guid == av->grh.dgid.global.interface_id; 528 } 529 530 struct sk_buff *rxe_init_packet(struct rxe_dev *rxe, struct rxe_av *av, 531 int paylen, struct rxe_pkt_info *pkt) 532 { 533 unsigned int hdr_len; 534 struct sk_buff *skb; 535 struct net_device *ndev; 536 const int port_num = 1; 537 538 ndev = rxe_netdev_from_av(rxe, port_num, av); 539 540 if (av->network_type == RDMA_NETWORK_IPV4) 541 hdr_len = ETH_HLEN + sizeof(struct udphdr) + 542 sizeof(struct iphdr); 543 else 544 hdr_len = ETH_HLEN + sizeof(struct udphdr) + 545 sizeof(struct ipv6hdr); 546 547 skb = alloc_skb(paylen + hdr_len + LL_RESERVED_SPACE(ndev), 548 GFP_ATOMIC); 549 550 if (unlikely(!skb)) { 551 dev_put(ndev); 552 return NULL; 553 } 554 555 skb_reserve(skb, hdr_len + LL_RESERVED_SPACE(rxe->ndev)); 556 557 skb->dev = ndev; 558 if (av->network_type == RDMA_NETWORK_IPV4) 559 skb->protocol = htons(ETH_P_IP); 560 else 561 skb->protocol = htons(ETH_P_IPV6); 562 563 pkt->rxe = rxe; 564 pkt->port_num = port_num; 565 pkt->hdr = skb_put(skb, paylen); 566 pkt->mask |= RXE_GRH_MASK; 567 568 memset(pkt->hdr, 0, paylen); 569 570 dev_put(ndev); 571 return skb; 572 } 573 574 /* 575 * this is required by rxe_cfg to match rxe devices in 576 * /sys/class/infiniband up with their underlying ethernet devices 577 */ 578 const char *rxe_parent_name(struct rxe_dev *rxe, unsigned int port_num) 579 { 580 return rxe->ndev->name; 581 } 582 583 enum rdma_link_layer rxe_link_layer(struct rxe_dev *rxe, unsigned int port_num) 584 { 585 return IB_LINK_LAYER_ETHERNET; 586 } 587 588 struct rxe_dev *rxe_net_add(struct net_device *ndev) 589 { 590 int err; 591 struct rxe_dev *rxe = NULL; 592 593 rxe = (struct rxe_dev *)ib_alloc_device(sizeof(*rxe)); 594 if (!rxe) 595 return NULL; 596 597 rxe->ndev = ndev; 598 599 err = rxe_add(rxe, ndev->mtu); 600 if (err) { 601 ib_dealloc_device(&rxe->ib_dev); 602 return NULL; 603 } 604 605 spin_lock_bh(&dev_list_lock); 606 list_add_tail(&rxe->list, &rxe_dev_list); 607 spin_unlock_bh(&dev_list_lock); 608 return rxe; 609 } 610 611 void rxe_remove_all(void) 612 { 613 spin_lock_bh(&dev_list_lock); 614 while (!list_empty(&rxe_dev_list)) { 615 struct rxe_dev *rxe = 616 list_first_entry(&rxe_dev_list, struct rxe_dev, list); 617 618 list_del(&rxe->list); 619 spin_unlock_bh(&dev_list_lock); 620 rxe_remove(rxe); 621 spin_lock_bh(&dev_list_lock); 622 } 623 spin_unlock_bh(&dev_list_lock); 624 } 625 EXPORT_SYMBOL(rxe_remove_all); 626 627 static void rxe_port_event(struct rxe_dev *rxe, 628 enum ib_event_type event) 629 { 630 struct ib_event ev; 631 632 ev.device = &rxe->ib_dev; 633 ev.element.port_num = 1; 634 ev.event = event; 635 636 ib_dispatch_event(&ev); 637 } 638 639 /* Caller must hold net_info_lock */ 640 void rxe_port_up(struct rxe_dev *rxe) 641 { 642 struct rxe_port *port; 643 644 port = &rxe->port; 645 port->attr.state = IB_PORT_ACTIVE; 646 port->attr.phys_state = IB_PHYS_STATE_LINK_UP; 647 648 rxe_port_event(rxe, IB_EVENT_PORT_ACTIVE); 649 pr_info("set %s active\n", rxe->ib_dev.name); 650 } 651 652 /* Caller must hold net_info_lock */ 653 void rxe_port_down(struct rxe_dev *rxe) 654 { 655 struct rxe_port *port; 656 657 port = &rxe->port; 658 port->attr.state = IB_PORT_DOWN; 659 port->attr.phys_state = IB_PHYS_STATE_LINK_DOWN; 660 661 rxe_port_event(rxe, IB_EVENT_PORT_ERR); 662 pr_info("set %s down\n", rxe->ib_dev.name); 663 } 664 665 static int rxe_notify(struct notifier_block *not_blk, 666 unsigned long event, 667 void *arg) 668 { 669 struct net_device *ndev = netdev_notifier_info_to_dev(arg); 670 struct rxe_dev *rxe = net_to_rxe(ndev); 671 672 if (!rxe) 673 goto out; 674 675 switch (event) { 676 case NETDEV_UNREGISTER: 677 list_del(&rxe->list); 678 rxe_remove(rxe); 679 break; 680 case NETDEV_UP: 681 rxe_port_up(rxe); 682 break; 683 case NETDEV_DOWN: 684 rxe_port_down(rxe); 685 break; 686 case NETDEV_CHANGEMTU: 687 pr_info("%s changed mtu to %d\n", ndev->name, ndev->mtu); 688 rxe_set_mtu(rxe, ndev->mtu); 689 break; 690 case NETDEV_CHANGE: 691 if (netif_running(ndev) && netif_carrier_ok(ndev)) 692 rxe_port_up(rxe); 693 else 694 rxe_port_down(rxe); 695 break; 696 case NETDEV_REBOOT: 697 case NETDEV_GOING_DOWN: 698 case NETDEV_CHANGEADDR: 699 case NETDEV_CHANGENAME: 700 case NETDEV_FEAT_CHANGE: 701 default: 702 pr_info("ignoring netdev event = %ld for %s\n", 703 event, ndev->name); 704 break; 705 } 706 out: 707 return NOTIFY_OK; 708 } 709 710 struct notifier_block rxe_net_notifier = { 711 .notifier_call = rxe_notify, 712 }; 713 714 static int rxe_net_ipv4_init(void) 715 { 716 recv_sockets.sk4 = rxe_setup_udp_tunnel(&init_net, 717 htons(ROCE_V2_UDP_DPORT), false); 718 if (IS_ERR(recv_sockets.sk4)) { 719 recv_sockets.sk4 = NULL; 720 pr_err("Failed to create IPv4 UDP tunnel\n"); 721 return -1; 722 } 723 724 return 0; 725 } 726 727 static int rxe_net_ipv6_init(void) 728 { 729 #if IS_ENABLED(CONFIG_IPV6) 730 731 recv_sockets.sk6 = rxe_setup_udp_tunnel(&init_net, 732 htons(ROCE_V2_UDP_DPORT), true); 733 if (IS_ERR(recv_sockets.sk6)) { 734 recv_sockets.sk6 = NULL; 735 pr_err("Failed to create IPv6 UDP tunnel\n"); 736 return -1; 737 } 738 #endif 739 return 0; 740 } 741 742 void rxe_net_exit(void) 743 { 744 rxe_release_udp_tunnel(recv_sockets.sk6); 745 rxe_release_udp_tunnel(recv_sockets.sk4); 746 unregister_netdevice_notifier(&rxe_net_notifier); 747 } 748 749 int rxe_net_init(void) 750 { 751 int err; 752 753 recv_sockets.sk6 = NULL; 754 755 err = rxe_net_ipv4_init(); 756 if (err) 757 return err; 758 err = rxe_net_ipv6_init(); 759 if (err) 760 goto err_out; 761 err = register_netdevice_notifier(&rxe_net_notifier); 762 if (err) { 763 pr_err("Failed to register netdev notifier\n"); 764 goto err_out; 765 } 766 return 0; 767 err_out: 768 rxe_net_exit(); 769 return err; 770 } 771