1 /* 2 * Copyright (c) 2005 Voltaire Inc. All rights reserved. 3 * Copyright (c) 2002-2005, Network Appliance, Inc. All rights reserved. 4 * Copyright (c) 1999-2005, Mellanox Technologies, Inc. All rights reserved. 5 * Copyright (c) 2005 Intel Corporation. All rights reserved. 6 * 7 * This software is available to you under a choice of one of two 8 * licenses. You may choose to be licensed under the terms of the GNU 9 * General Public License (GPL) Version 2, available from the file 10 * COPYING in the main directory of this source tree, or the 11 * OpenIB.org BSD license below: 12 * 13 * Redistribution and use in source and binary forms, with or 14 * without modification, are permitted provided that the following 15 * conditions are met: 16 * 17 * - Redistributions of source code must retain the above 18 * copyright notice, this list of conditions and the following 19 * disclaimer. 20 * 21 * - Redistributions in binary form must reproduce the above 22 * copyright notice, this list of conditions and the following 23 * disclaimer in the documentation and/or other materials 24 * provided with the distribution. 25 * 26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 33 * SOFTWARE. 34 */ 35 36 #include <linux/mutex.h> 37 #include <linux/inetdevice.h> 38 #include <linux/slab.h> 39 #include <linux/workqueue.h> 40 #include <linux/module.h> 41 #include <net/route.h> 42 #include <net/netevent.h> 43 #include <rdma/ib_addr.h> 44 #include <rdma/ib.h> 45 46 #include <netinet/if_ether.h> 47 #include <netinet/ip_var.h> 48 #include <netinet6/scope6_var.h> 49 #include <netinet6/in6_pcb.h> 50 51 #include "core_priv.h" 52 53 struct addr_req { 54 struct list_head list; 55 struct sockaddr_storage src_addr; 56 struct sockaddr_storage dst_addr; 57 struct rdma_dev_addr *addr; 58 struct rdma_addr_client *client; 59 void *context; 60 void (*callback)(int status, struct sockaddr *src_addr, 61 struct rdma_dev_addr *addr, void *context); 62 unsigned long timeout; 63 int status; 64 }; 65 66 static void process_req(struct work_struct *work); 67 68 static DEFINE_MUTEX(lock); 69 static LIST_HEAD(req_list); 70 static DECLARE_DELAYED_WORK(work, process_req); 71 static struct workqueue_struct *addr_wq; 72 73 int rdma_addr_size(struct sockaddr *addr) 74 { 75 switch (addr->sa_family) { 76 case AF_INET: 77 return sizeof(struct sockaddr_in); 78 case AF_INET6: 79 return sizeof(struct sockaddr_in6); 80 case AF_IB: 81 return sizeof(struct sockaddr_ib); 82 default: 83 return 0; 84 } 85 } 86 EXPORT_SYMBOL(rdma_addr_size); 87 88 static struct rdma_addr_client self; 89 90 void rdma_addr_register_client(struct rdma_addr_client *client) 91 { 92 atomic_set(&client->refcount, 1); 93 init_completion(&client->comp); 94 } 95 EXPORT_SYMBOL(rdma_addr_register_client); 96 97 static inline void put_client(struct rdma_addr_client *client) 98 { 99 if (atomic_dec_and_test(&client->refcount)) 100 complete(&client->comp); 101 } 102 103 void rdma_addr_unregister_client(struct rdma_addr_client *client) 104 { 105 put_client(client); 106 wait_for_completion(&client->comp); 107 } 108 EXPORT_SYMBOL(rdma_addr_unregister_client); 109 110 static inline void 111 rdma_copy_addr_sub(u8 *dst, const u8 *src, unsigned min, unsigned max) 112 { 113 if (min > max) 114 min = max; 115 memcpy(dst, src, min); 116 memset(dst + min, 0, max - min); 117 } 118 119 int rdma_copy_addr(struct rdma_dev_addr *dev_addr, struct net_device *dev, 120 const unsigned char *dst_dev_addr) 121 { 122 if (dev->if_type == IFT_INFINIBAND) 123 dev_addr->dev_type = ARPHRD_INFINIBAND; 124 else if (dev->if_type == IFT_ETHER) 125 dev_addr->dev_type = ARPHRD_ETHER; 126 else 127 dev_addr->dev_type = 0; 128 rdma_copy_addr_sub(dev_addr->src_dev_addr, IF_LLADDR(dev), 129 dev->if_addrlen, MAX_ADDR_LEN); 130 rdma_copy_addr_sub(dev_addr->broadcast, dev->if_broadcastaddr, 131 dev->if_addrlen, MAX_ADDR_LEN); 132 if (dst_dev_addr != NULL) { 133 rdma_copy_addr_sub(dev_addr->dst_dev_addr, dst_dev_addr, 134 dev->if_addrlen, MAX_ADDR_LEN); 135 } 136 dev_addr->bound_dev_if = dev->if_index; 137 return 0; 138 } 139 EXPORT_SYMBOL(rdma_copy_addr); 140 141 int rdma_translate_ip(const struct sockaddr *addr, 142 struct rdma_dev_addr *dev_addr, 143 u16 *vlan_id) 144 { 145 struct net_device *dev = NULL; 146 int ret = -EADDRNOTAVAIL; 147 148 if (dev_addr->bound_dev_if) { 149 dev = dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if); 150 if (!dev) 151 return -ENODEV; 152 ret = rdma_copy_addr(dev_addr, dev, NULL); 153 dev_put(dev); 154 return ret; 155 } 156 157 switch (addr->sa_family) { 158 #ifdef INET 159 case AF_INET: 160 dev = ip_dev_find(dev_addr->net, 161 ((const struct sockaddr_in *)addr)->sin_addr.s_addr); 162 break; 163 #endif 164 #ifdef INET6 165 case AF_INET6: { 166 struct in6_addr in6_addr = ((const struct sockaddr_in6 *)addr)->sin6_addr; 167 168 /* embed scope ID */ 169 in6_addr.s6_addr[3] = ((const struct sockaddr_in6 *)addr)->sin6_scope_id; 170 171 dev = ip6_dev_find(dev_addr->net, in6_addr); 172 break; 173 } 174 #endif 175 default: 176 break; 177 } 178 179 if (dev != NULL) { 180 ret = rdma_copy_addr(dev_addr, dev, NULL); 181 if (vlan_id) 182 *vlan_id = rdma_vlan_dev_vlan_id(dev); 183 dev_put(dev); 184 } 185 return ret; 186 } 187 EXPORT_SYMBOL(rdma_translate_ip); 188 189 static void set_timeout(unsigned long time) 190 { 191 int delay; /* under FreeBSD ticks are 32-bit */ 192 193 delay = time - jiffies; 194 if (delay <= 0) 195 delay = 1; 196 197 mod_delayed_work(addr_wq, &work, delay); 198 } 199 200 static void queue_req(struct addr_req *req) 201 { 202 struct addr_req *temp_req; 203 204 mutex_lock(&lock); 205 list_for_each_entry_reverse(temp_req, &req_list, list) { 206 if (time_after_eq(req->timeout, temp_req->timeout)) 207 break; 208 } 209 210 list_add(&req->list, &temp_req->list); 211 212 if (req_list.next == &req->list) 213 set_timeout(req->timeout); 214 mutex_unlock(&lock); 215 } 216 217 #if defined(INET) || defined(INET6) 218 static int addr_resolve_multi(u8 *edst, struct ifnet *ifp, struct sockaddr *dst_in) 219 { 220 struct sockaddr *llsa; 221 struct sockaddr_dl sdl; 222 int error; 223 224 sdl.sdl_len = sizeof(sdl); 225 llsa = (struct sockaddr *)&sdl; 226 227 if (ifp->if_resolvemulti == NULL) { 228 error = EOPNOTSUPP; 229 } else { 230 error = ifp->if_resolvemulti(ifp, &llsa, dst_in); 231 if (error == 0) { 232 rdma_copy_addr_sub(edst, LLADDR((struct sockaddr_dl *)llsa), 233 ifp->if_addrlen, MAX_ADDR_LEN); 234 } 235 } 236 return (error); 237 } 238 #endif 239 240 #ifdef INET 241 static int addr4_resolve(struct sockaddr_in *src_in, 242 const struct sockaddr_in *dst_in, 243 struct rdma_dev_addr *addr, 244 struct ifnet **ifpp) 245 { 246 struct sockaddr_in dst_tmp = *dst_in; 247 u8 edst[MAX_ADDR_LEN]; 248 struct rtentry *rte; 249 struct ifnet *ifp; 250 int error; 251 252 /* 253 * Make sure the socket address length field 254 * is set, else rtalloc1() will fail. 255 */ 256 dst_tmp.sin_len = sizeof(dst_tmp); 257 258 CURVNET_SET(addr->net); 259 /* set default TTL limit */ 260 addr->hoplimit = V_ip_defttl; 261 262 /* lookup route for destination */ 263 rte = rtalloc1((struct sockaddr *)&dst_tmp, 1, 0); 264 CURVNET_RESTORE(); 265 266 /* 267 * Make sure the route exists and has a valid link. 268 */ 269 if (rte == NULL) { 270 error = EHOSTUNREACH; 271 goto done; 272 } else if (rte->rt_ifp == NULL || RT_LINK_IS_UP(rte->rt_ifp) == 0) { 273 RTFREE_LOCKED(rte); 274 error = EHOSTUNREACH; 275 goto done; 276 } else if (src_in->sin_addr.s_addr != INADDR_ANY) { 277 RT_UNLOCK(rte); 278 279 ifp = ip_dev_find(addr->net, src_in->sin_addr.s_addr); 280 if (ifp == NULL) { 281 RTFREE(rte); 282 error = ENETUNREACH; 283 goto done; 284 } else if (ifp != rte->rt_ifp) { 285 error = ENETUNREACH; 286 goto failure; 287 } 288 } else { 289 struct sockaddr *saddr; 290 291 ifp = rte->rt_ifp; 292 dev_hold(ifp); 293 294 saddr = rte->rt_ifa->ifa_addr; 295 memcpy(src_in, saddr, rdma_addr_size(saddr)); 296 RT_UNLOCK(rte); 297 } 298 299 /* 300 * Resolve destination MAC address 301 */ 302 if (dst_tmp.sin_addr.s_addr == INADDR_BROADCAST) { 303 rdma_copy_addr_sub(edst, ifp->if_broadcastaddr, 304 ifp->if_addrlen, MAX_ADDR_LEN); 305 } else if (IN_MULTICAST(ntohl(dst_tmp.sin_addr.s_addr))) { 306 error = addr_resolve_multi(edst, ifp, (struct sockaddr *)&dst_tmp); 307 if (error != 0) 308 goto failure; 309 } else { 310 bool is_gw = (rte->rt_flags & RTF_GATEWAY) != 0; 311 memset(edst, 0, sizeof(edst)); 312 error = arpresolve(ifp, is_gw, NULL, is_gw ? 313 rte->rt_gateway : (const struct sockaddr *)&dst_tmp, 314 edst, NULL, NULL); 315 if (error != 0) 316 goto failure; 317 else if (is_gw != 0) 318 addr->network = RDMA_NETWORK_IPV4; 319 } 320 321 /* 322 * Copy destination and source MAC addresses 323 */ 324 error = -rdma_copy_addr(addr, ifp, edst); 325 if (error != 0) { 326 failure: 327 dev_put(ifp); 328 329 if (error == EWOULDBLOCK || error == EAGAIN) 330 error = ENODATA; 331 } else { 332 *ifpp = ifp; 333 } 334 RTFREE(rte); 335 done: 336 return (-error); 337 } 338 #else 339 static int addr4_resolve(struct sockaddr_in *src_in, 340 const struct sockaddr_in *dst_in, 341 struct rdma_dev_addr *addr, 342 struct ifnet **ifpp) 343 { 344 return -EADDRNOTAVAIL; 345 } 346 #endif 347 348 #ifdef INET6 349 static int addr6_resolve(struct sockaddr_in6 *src_in, 350 const struct sockaddr_in6 *dst_in, 351 struct rdma_dev_addr *addr, 352 struct ifnet **ifpp) 353 { 354 struct sockaddr_in6 dst_tmp = *dst_in; 355 u8 edst[MAX_ADDR_LEN]; 356 struct rtentry *rte; 357 struct ifnet *ifp; 358 int error; 359 360 sa6_embedscope(&dst_tmp, 0); 361 sa6_embedscope(src_in, 0); 362 363 /* 364 * Make sure the socket address length field 365 * is set, else rtalloc1() will fail. 366 */ 367 dst_tmp.sin6_len = sizeof(dst_tmp); 368 369 CURVNET_SET(addr->net); 370 /* set default TTL limit */ 371 addr->hoplimit = V_ip_defttl; 372 373 /* lookup route for destination */ 374 rte = rtalloc1((struct sockaddr *)&dst_tmp, 1, 0); 375 CURVNET_RESTORE(); 376 377 /* 378 * Make sure the route exists and has a valid link. 379 */ 380 if (rte == NULL) { 381 error = EHOSTUNREACH; 382 goto done; 383 } else if (rte->rt_ifp == NULL || RT_LINK_IS_UP(rte->rt_ifp) == 0) { 384 RTFREE_LOCKED(rte); 385 error = EHOSTUNREACH; 386 goto done; 387 } else if (!IN6_IS_ADDR_UNSPECIFIED(&src_in->sin6_addr)) { 388 RT_UNLOCK(rte); 389 390 ifp = ip6_dev_find(addr->net, src_in->sin6_addr); 391 if (ifp == NULL) { 392 RTFREE(rte); 393 error = ENETUNREACH; 394 goto done; 395 } else if (ifp != rte->rt_ifp) { 396 error = ENETUNREACH; 397 goto failure; 398 } 399 } else { 400 struct sockaddr *saddr; 401 402 ifp = rte->rt_ifp; 403 dev_hold(ifp); 404 405 saddr = rte->rt_ifa->ifa_addr; 406 memcpy(src_in, saddr, rdma_addr_size(saddr)); 407 RT_UNLOCK(rte); 408 } 409 410 /* 411 * Resolve destination MAC address 412 */ 413 if (IN6_IS_ADDR_MULTICAST(&dst_tmp.sin6_addr)) { 414 error = addr_resolve_multi(edst, ifp, (struct sockaddr *)&dst_tmp); 415 if (error != 0) 416 goto failure; 417 } else { 418 bool is_gw = (rte->rt_flags & RTF_GATEWAY) != 0; 419 memset(edst, 0, sizeof(edst)); 420 error = nd6_resolve(ifp, is_gw, NULL, is_gw ? 421 rte->rt_gateway : (const struct sockaddr *)&dst_tmp, 422 edst, NULL, NULL); 423 if (error != 0) 424 goto failure; 425 else if (is_gw != 0) 426 addr->network = RDMA_NETWORK_IPV6; 427 } 428 429 /* 430 * Copy destination and source MAC addresses 431 */ 432 error = -rdma_copy_addr(addr, ifp, edst); 433 if (error != 0) { 434 failure: 435 dev_put(ifp); 436 437 if (error == EWOULDBLOCK || error == EAGAIN) 438 error = ENODATA; 439 } else { 440 *ifpp = ifp; 441 } 442 RTFREE(rte); 443 done: 444 sa6_recoverscope(&dst_tmp); 445 sa6_recoverscope(src_in); 446 447 return (-error); 448 } 449 #else 450 static int addr6_resolve(struct sockaddr_in6 *src_in, 451 const struct sockaddr_in6 *dst_in, 452 struct rdma_dev_addr *addr, 453 struct ifnet **ifpp) 454 { 455 return -EADDRNOTAVAIL; 456 } 457 #endif 458 459 static int addr_resolve_neigh(struct ifnet *dev, 460 const struct sockaddr *dst_in, 461 struct rdma_dev_addr *addr) 462 { 463 if (dev->if_flags & IFF_LOOPBACK) { 464 int ret; 465 466 ret = rdma_translate_ip(dst_in, addr, NULL); 467 if (!ret) 468 memcpy(addr->dst_dev_addr, addr->src_dev_addr, 469 MAX_ADDR_LEN); 470 471 return ret; 472 } 473 474 /* If the device doesn't do ARP internally */ 475 if (!(dev->if_flags & IFF_NOARP)) 476 return 0; 477 478 return rdma_copy_addr(addr, dev, NULL); 479 } 480 481 static int addr_resolve(struct sockaddr *src_in, 482 const struct sockaddr *dst_in, 483 struct rdma_dev_addr *addr, 484 bool resolve_neigh) 485 { 486 struct net_device *ndev = NULL; 487 int ret; 488 489 if (dst_in->sa_family != src_in->sa_family) 490 return -EINVAL; 491 492 if (src_in->sa_family == AF_INET) { 493 ret = addr4_resolve((struct sockaddr_in *)src_in, 494 (const struct sockaddr_in *)dst_in, 495 addr, &ndev); 496 if (ret) 497 return ret; 498 499 if (resolve_neigh) 500 ret = addr_resolve_neigh(ndev, dst_in, addr); 501 } else { 502 ret = addr6_resolve((struct sockaddr_in6 *)src_in, 503 (const struct sockaddr_in6 *)dst_in, addr, 504 &ndev); 505 if (ret) 506 return ret; 507 508 if (resolve_neigh) 509 ret = addr_resolve_neigh(ndev, dst_in, addr); 510 } 511 512 addr->bound_dev_if = ndev->if_index; 513 addr->net = dev_net(ndev); 514 dev_put(ndev); 515 516 return ret; 517 } 518 519 static void process_req(struct work_struct *work) 520 { 521 struct addr_req *req, *temp_req; 522 struct sockaddr *src_in, *dst_in; 523 struct list_head done_list; 524 525 INIT_LIST_HEAD(&done_list); 526 527 mutex_lock(&lock); 528 list_for_each_entry_safe(req, temp_req, &req_list, list) { 529 if (req->status == -ENODATA) { 530 src_in = (struct sockaddr *) &req->src_addr; 531 dst_in = (struct sockaddr *) &req->dst_addr; 532 req->status = addr_resolve(src_in, dst_in, req->addr, 533 true); 534 if (req->status && time_after_eq(jiffies, req->timeout)) 535 req->status = -ETIMEDOUT; 536 else if (req->status == -ENODATA) 537 continue; 538 } 539 list_move_tail(&req->list, &done_list); 540 } 541 542 if (!list_empty(&req_list)) { 543 req = list_entry(req_list.next, struct addr_req, list); 544 set_timeout(req->timeout); 545 } 546 mutex_unlock(&lock); 547 548 list_for_each_entry_safe(req, temp_req, &done_list, list) { 549 list_del(&req->list); 550 req->callback(req->status, (struct sockaddr *) &req->src_addr, 551 req->addr, req->context); 552 put_client(req->client); 553 kfree(req); 554 } 555 } 556 557 int rdma_resolve_ip(struct rdma_addr_client *client, 558 struct sockaddr *src_addr, struct sockaddr *dst_addr, 559 struct rdma_dev_addr *addr, int timeout_ms, 560 void (*callback)(int status, struct sockaddr *src_addr, 561 struct rdma_dev_addr *addr, void *context), 562 void *context) 563 { 564 struct sockaddr *src_in, *dst_in; 565 struct addr_req *req; 566 int ret = 0; 567 568 req = kzalloc(sizeof *req, GFP_KERNEL); 569 if (!req) 570 return -ENOMEM; 571 572 src_in = (struct sockaddr *) &req->src_addr; 573 dst_in = (struct sockaddr *) &req->dst_addr; 574 575 if (src_addr) { 576 if (src_addr->sa_family != dst_addr->sa_family) { 577 ret = -EINVAL; 578 goto err; 579 } 580 581 memcpy(src_in, src_addr, rdma_addr_size(src_addr)); 582 } else { 583 src_in->sa_family = dst_addr->sa_family; 584 } 585 586 memcpy(dst_in, dst_addr, rdma_addr_size(dst_addr)); 587 req->addr = addr; 588 req->callback = callback; 589 req->context = context; 590 req->client = client; 591 atomic_inc(&client->refcount); 592 593 req->status = addr_resolve(src_in, dst_in, addr, true); 594 switch (req->status) { 595 case 0: 596 req->timeout = jiffies; 597 queue_req(req); 598 break; 599 case -ENODATA: 600 req->timeout = msecs_to_jiffies(timeout_ms) + jiffies; 601 queue_req(req); 602 break; 603 default: 604 ret = req->status; 605 atomic_dec(&client->refcount); 606 goto err; 607 } 608 return ret; 609 err: 610 kfree(req); 611 return ret; 612 } 613 EXPORT_SYMBOL(rdma_resolve_ip); 614 615 int rdma_resolve_ip_route(struct sockaddr *src_addr, 616 const struct sockaddr *dst_addr, 617 struct rdma_dev_addr *addr) 618 { 619 struct sockaddr_storage ssrc_addr = {}; 620 struct sockaddr *src_in = (struct sockaddr *)&ssrc_addr; 621 622 if (src_addr) { 623 if (src_addr->sa_family != dst_addr->sa_family) 624 return -EINVAL; 625 626 memcpy(src_in, src_addr, rdma_addr_size(src_addr)); 627 } else { 628 src_in->sa_family = dst_addr->sa_family; 629 } 630 631 return addr_resolve(src_in, dst_addr, addr, false); 632 } 633 EXPORT_SYMBOL(rdma_resolve_ip_route); 634 635 void rdma_addr_cancel(struct rdma_dev_addr *addr) 636 { 637 struct addr_req *req, *temp_req; 638 639 mutex_lock(&lock); 640 list_for_each_entry_safe(req, temp_req, &req_list, list) { 641 if (req->addr == addr) { 642 req->status = -ECANCELED; 643 req->timeout = jiffies; 644 list_move(&req->list, &req_list); 645 set_timeout(req->timeout); 646 break; 647 } 648 } 649 mutex_unlock(&lock); 650 } 651 EXPORT_SYMBOL(rdma_addr_cancel); 652 653 struct resolve_cb_context { 654 struct rdma_dev_addr *addr; 655 struct completion comp; 656 int status; 657 }; 658 659 static void resolve_cb(int status, struct sockaddr *src_addr, 660 struct rdma_dev_addr *addr, void *context) 661 { 662 if (!status) 663 memcpy(((struct resolve_cb_context *)context)->addr, 664 addr, sizeof(struct rdma_dev_addr)); 665 ((struct resolve_cb_context *)context)->status = status; 666 complete(&((struct resolve_cb_context *)context)->comp); 667 } 668 669 int rdma_addr_find_l2_eth_by_grh(const union ib_gid *sgid, 670 const union ib_gid *dgid, 671 u8 *dmac, u16 *vlan_id, int *if_index, 672 int *hoplimit) 673 { 674 int ret = 0; 675 struct rdma_dev_addr dev_addr; 676 struct resolve_cb_context ctx; 677 struct net_device *dev; 678 679 union { 680 struct sockaddr _sockaddr; 681 struct sockaddr_in _sockaddr_in; 682 struct sockaddr_in6 _sockaddr_in6; 683 } sgid_addr, dgid_addr; 684 685 686 rdma_gid2ip(&sgid_addr._sockaddr, sgid); 687 rdma_gid2ip(&dgid_addr._sockaddr, dgid); 688 689 memset(&dev_addr, 0, sizeof(dev_addr)); 690 if (if_index) 691 dev_addr.bound_dev_if = *if_index; 692 dev_addr.net = TD_TO_VNET(curthread); 693 694 ctx.addr = &dev_addr; 695 init_completion(&ctx.comp); 696 ret = rdma_resolve_ip(&self, &sgid_addr._sockaddr, &dgid_addr._sockaddr, 697 &dev_addr, 1000, resolve_cb, &ctx); 698 if (ret) 699 return ret; 700 701 wait_for_completion(&ctx.comp); 702 703 ret = ctx.status; 704 if (ret) 705 return ret; 706 707 memcpy(dmac, dev_addr.dst_dev_addr, ETH_ALEN); 708 dev = dev_get_by_index(dev_addr.net, dev_addr.bound_dev_if); 709 if (!dev) 710 return -ENODEV; 711 if (if_index) 712 *if_index = dev_addr.bound_dev_if; 713 if (vlan_id) 714 *vlan_id = rdma_vlan_dev_vlan_id(dev); 715 if (hoplimit) 716 *hoplimit = dev_addr.hoplimit; 717 dev_put(dev); 718 return ret; 719 } 720 EXPORT_SYMBOL(rdma_addr_find_l2_eth_by_grh); 721 722 int rdma_addr_find_smac_by_sgid(union ib_gid *sgid, u8 *smac, u16 *vlan_id) 723 { 724 int ret = 0; 725 struct rdma_dev_addr dev_addr; 726 union { 727 struct sockaddr _sockaddr; 728 struct sockaddr_in _sockaddr_in; 729 struct sockaddr_in6 _sockaddr_in6; 730 } gid_addr; 731 732 rdma_gid2ip(&gid_addr._sockaddr, sgid); 733 734 memset(&dev_addr, 0, sizeof(dev_addr)); 735 dev_addr.net = TD_TO_VNET(curthread); 736 ret = rdma_translate_ip(&gid_addr._sockaddr, &dev_addr, vlan_id); 737 if (ret) 738 return ret; 739 740 memcpy(smac, dev_addr.src_dev_addr, ETH_ALEN); 741 return ret; 742 } 743 EXPORT_SYMBOL(rdma_addr_find_smac_by_sgid); 744 745 int addr_init(void) 746 { 747 addr_wq = alloc_workqueue("ib_addr", WQ_MEM_RECLAIM, 0); 748 if (!addr_wq) 749 return -ENOMEM; 750 751 rdma_addr_register_client(&self); 752 753 return 0; 754 } 755 756 void addr_cleanup(void) 757 { 758 rdma_addr_unregister_client(&self); 759 destroy_workqueue(addr_wq); 760 } 761