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) 2005-2006 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/completion.h> 37 #include <linux/in.h> 38 #include <linux/in6.h> 39 #include <linux/mutex.h> 40 #include <linux/random.h> 41 #include <linux/igmp.h> 42 #include <linux/idr.h> 43 #include <linux/inetdevice.h> 44 #include <linux/slab.h> 45 #include <linux/module.h> 46 #include <net/route.h> 47 48 #include <net/net_namespace.h> 49 #include <net/netns/generic.h> 50 #include <net/tcp.h> 51 #include <net/ipv6.h> 52 #include <net/ip_fib.h> 53 #include <net/ip6_route.h> 54 55 #include <rdma/rdma_cm.h> 56 #include <rdma/rdma_cm_ib.h> 57 #include <rdma/rdma_netlink.h> 58 #include <rdma/ib.h> 59 #include <rdma/ib_cache.h> 60 #include <rdma/ib_cm.h> 61 #include <rdma/ib_sa.h> 62 #include <rdma/iw_cm.h> 63 64 #include "core_priv.h" 65 66 MODULE_AUTHOR("Sean Hefty"); 67 MODULE_DESCRIPTION("Generic RDMA CM Agent"); 68 MODULE_LICENSE("Dual BSD/GPL"); 69 70 #define CMA_CM_RESPONSE_TIMEOUT 20 71 #define CMA_QUERY_CLASSPORT_INFO_TIMEOUT 3000 72 #define CMA_MAX_CM_RETRIES 15 73 #define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24) 74 #define CMA_IBOE_PACKET_LIFETIME 18 75 76 static const char * const cma_events[] = { 77 [RDMA_CM_EVENT_ADDR_RESOLVED] = "address resolved", 78 [RDMA_CM_EVENT_ADDR_ERROR] = "address error", 79 [RDMA_CM_EVENT_ROUTE_RESOLVED] = "route resolved ", 80 [RDMA_CM_EVENT_ROUTE_ERROR] = "route error", 81 [RDMA_CM_EVENT_CONNECT_REQUEST] = "connect request", 82 [RDMA_CM_EVENT_CONNECT_RESPONSE] = "connect response", 83 [RDMA_CM_EVENT_CONNECT_ERROR] = "connect error", 84 [RDMA_CM_EVENT_UNREACHABLE] = "unreachable", 85 [RDMA_CM_EVENT_REJECTED] = "rejected", 86 [RDMA_CM_EVENT_ESTABLISHED] = "established", 87 [RDMA_CM_EVENT_DISCONNECTED] = "disconnected", 88 [RDMA_CM_EVENT_DEVICE_REMOVAL] = "device removal", 89 [RDMA_CM_EVENT_MULTICAST_JOIN] = "multicast join", 90 [RDMA_CM_EVENT_MULTICAST_ERROR] = "multicast error", 91 [RDMA_CM_EVENT_ADDR_CHANGE] = "address change", 92 [RDMA_CM_EVENT_TIMEWAIT_EXIT] = "timewait exit", 93 }; 94 95 const char *__attribute_const__ rdma_event_msg(enum rdma_cm_event_type event) 96 { 97 size_t index = event; 98 99 return (index < ARRAY_SIZE(cma_events) && cma_events[index]) ? 100 cma_events[index] : "unrecognized event"; 101 } 102 EXPORT_SYMBOL(rdma_event_msg); 103 104 static void cma_add_one(struct ib_device *device); 105 static void cma_remove_one(struct ib_device *device, void *client_data); 106 107 static struct ib_client cma_client = { 108 .name = "cma", 109 .add = cma_add_one, 110 .remove = cma_remove_one 111 }; 112 113 static struct ib_sa_client sa_client; 114 static struct rdma_addr_client addr_client; 115 static LIST_HEAD(dev_list); 116 static LIST_HEAD(listen_any_list); 117 static DEFINE_MUTEX(lock); 118 static struct workqueue_struct *cma_wq; 119 static int cma_pernet_id; 120 121 struct cma_pernet { 122 struct idr tcp_ps; 123 struct idr udp_ps; 124 struct idr ipoib_ps; 125 struct idr ib_ps; 126 }; 127 128 static struct cma_pernet *cma_pernet(struct net *net) 129 { 130 return net_generic(net, cma_pernet_id); 131 } 132 133 static struct idr *cma_pernet_idr(struct net *net, enum rdma_port_space ps) 134 { 135 struct cma_pernet *pernet = cma_pernet(net); 136 137 switch (ps) { 138 case RDMA_PS_TCP: 139 return &pernet->tcp_ps; 140 case RDMA_PS_UDP: 141 return &pernet->udp_ps; 142 case RDMA_PS_IPOIB: 143 return &pernet->ipoib_ps; 144 case RDMA_PS_IB: 145 return &pernet->ib_ps; 146 default: 147 return NULL; 148 } 149 } 150 151 struct cma_device { 152 struct list_head list; 153 struct ib_device *device; 154 struct completion comp; 155 atomic_t refcount; 156 struct list_head id_list; 157 enum ib_gid_type *default_gid_type; 158 }; 159 160 struct rdma_bind_list { 161 enum rdma_port_space ps; 162 struct hlist_head owners; 163 unsigned short port; 164 }; 165 166 struct class_port_info_context { 167 struct ib_class_port_info *class_port_info; 168 struct ib_device *device; 169 struct completion done; 170 struct ib_sa_query *sa_query; 171 u8 port_num; 172 }; 173 174 static int cma_ps_alloc(struct net *net, enum rdma_port_space ps, 175 struct rdma_bind_list *bind_list, int snum) 176 { 177 struct idr *idr = cma_pernet_idr(net, ps); 178 179 return idr_alloc(idr, bind_list, snum, snum + 1, GFP_KERNEL); 180 } 181 182 static struct rdma_bind_list *cma_ps_find(struct net *net, 183 enum rdma_port_space ps, int snum) 184 { 185 struct idr *idr = cma_pernet_idr(net, ps); 186 187 return idr_find(idr, snum); 188 } 189 190 static void cma_ps_remove(struct net *net, enum rdma_port_space ps, int snum) 191 { 192 struct idr *idr = cma_pernet_idr(net, ps); 193 194 idr_remove(idr, snum); 195 } 196 197 enum { 198 CMA_OPTION_AFONLY, 199 }; 200 201 void cma_ref_dev(struct cma_device *cma_dev) 202 { 203 atomic_inc(&cma_dev->refcount); 204 } 205 206 struct cma_device *cma_enum_devices_by_ibdev(cma_device_filter filter, 207 void *cookie) 208 { 209 struct cma_device *cma_dev; 210 struct cma_device *found_cma_dev = NULL; 211 212 mutex_lock(&lock); 213 214 list_for_each_entry(cma_dev, &dev_list, list) 215 if (filter(cma_dev->device, cookie)) { 216 found_cma_dev = cma_dev; 217 break; 218 } 219 220 if (found_cma_dev) 221 cma_ref_dev(found_cma_dev); 222 mutex_unlock(&lock); 223 return found_cma_dev; 224 } 225 226 int cma_get_default_gid_type(struct cma_device *cma_dev, 227 unsigned int port) 228 { 229 if (port < rdma_start_port(cma_dev->device) || 230 port > rdma_end_port(cma_dev->device)) 231 return -EINVAL; 232 233 return cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)]; 234 } 235 236 int cma_set_default_gid_type(struct cma_device *cma_dev, 237 unsigned int port, 238 enum ib_gid_type default_gid_type) 239 { 240 unsigned long supported_gids; 241 242 if (port < rdma_start_port(cma_dev->device) || 243 port > rdma_end_port(cma_dev->device)) 244 return -EINVAL; 245 246 supported_gids = roce_gid_type_mask_support(cma_dev->device, port); 247 248 if (!(supported_gids & 1 << default_gid_type)) 249 return -EINVAL; 250 251 cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)] = 252 default_gid_type; 253 254 return 0; 255 } 256 257 struct ib_device *cma_get_ib_dev(struct cma_device *cma_dev) 258 { 259 return cma_dev->device; 260 } 261 262 /* 263 * Device removal can occur at anytime, so we need extra handling to 264 * serialize notifying the user of device removal with other callbacks. 265 * We do this by disabling removal notification while a callback is in process, 266 * and reporting it after the callback completes. 267 */ 268 struct rdma_id_private { 269 struct rdma_cm_id id; 270 271 struct rdma_bind_list *bind_list; 272 struct hlist_node node; 273 struct list_head list; /* listen_any_list or cma_device.list */ 274 struct list_head listen_list; /* per device listens */ 275 struct cma_device *cma_dev; 276 struct list_head mc_list; 277 278 int internal_id; 279 enum rdma_cm_state state; 280 spinlock_t lock; 281 struct mutex qp_mutex; 282 283 struct completion comp; 284 atomic_t refcount; 285 struct mutex handler_mutex; 286 287 int backlog; 288 int timeout_ms; 289 struct ib_sa_query *query; 290 int query_id; 291 union { 292 struct ib_cm_id *ib; 293 struct iw_cm_id *iw; 294 } cm_id; 295 296 u32 seq_num; 297 u32 qkey; 298 u32 qp_num; 299 pid_t owner; 300 u32 options; 301 u8 srq; 302 u8 tos; 303 u8 reuseaddr; 304 u8 afonly; 305 enum ib_gid_type gid_type; 306 }; 307 308 struct cma_multicast { 309 struct rdma_id_private *id_priv; 310 union { 311 struct ib_sa_multicast *ib; 312 } multicast; 313 struct list_head list; 314 void *context; 315 struct sockaddr_storage addr; 316 struct kref mcref; 317 bool igmp_joined; 318 u8 join_state; 319 }; 320 321 struct cma_work { 322 struct work_struct work; 323 struct rdma_id_private *id; 324 enum rdma_cm_state old_state; 325 enum rdma_cm_state new_state; 326 struct rdma_cm_event event; 327 }; 328 329 struct cma_ndev_work { 330 struct work_struct work; 331 struct rdma_id_private *id; 332 struct rdma_cm_event event; 333 }; 334 335 struct iboe_mcast_work { 336 struct work_struct work; 337 struct rdma_id_private *id; 338 struct cma_multicast *mc; 339 }; 340 341 union cma_ip_addr { 342 struct in6_addr ip6; 343 struct { 344 __be32 pad[3]; 345 __be32 addr; 346 } ip4; 347 }; 348 349 struct cma_hdr { 350 u8 cma_version; 351 u8 ip_version; /* IP version: 7:4 */ 352 __be16 port; 353 union cma_ip_addr src_addr; 354 union cma_ip_addr dst_addr; 355 }; 356 357 #define CMA_VERSION 0x00 358 359 struct cma_req_info { 360 struct ib_device *device; 361 int port; 362 union ib_gid local_gid; 363 __be64 service_id; 364 u16 pkey; 365 bool has_gid:1; 366 }; 367 368 static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp) 369 { 370 unsigned long flags; 371 int ret; 372 373 spin_lock_irqsave(&id_priv->lock, flags); 374 ret = (id_priv->state == comp); 375 spin_unlock_irqrestore(&id_priv->lock, flags); 376 return ret; 377 } 378 379 static int cma_comp_exch(struct rdma_id_private *id_priv, 380 enum rdma_cm_state comp, enum rdma_cm_state exch) 381 { 382 unsigned long flags; 383 int ret; 384 385 spin_lock_irqsave(&id_priv->lock, flags); 386 if ((ret = (id_priv->state == comp))) 387 id_priv->state = exch; 388 spin_unlock_irqrestore(&id_priv->lock, flags); 389 return ret; 390 } 391 392 static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv, 393 enum rdma_cm_state exch) 394 { 395 unsigned long flags; 396 enum rdma_cm_state old; 397 398 spin_lock_irqsave(&id_priv->lock, flags); 399 old = id_priv->state; 400 id_priv->state = exch; 401 spin_unlock_irqrestore(&id_priv->lock, flags); 402 return old; 403 } 404 405 static inline u8 cma_get_ip_ver(const struct cma_hdr *hdr) 406 { 407 return hdr->ip_version >> 4; 408 } 409 410 static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver) 411 { 412 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF); 413 } 414 415 static int cma_igmp_send(struct net_device *ndev, union ib_gid *mgid, bool join) 416 { 417 struct in_device *in_dev = NULL; 418 419 if (ndev) { 420 rtnl_lock(); 421 in_dev = __in_dev_get_rtnl(ndev); 422 if (in_dev) { 423 if (join) 424 ip_mc_inc_group(in_dev, 425 *(__be32 *)(mgid->raw + 12)); 426 else 427 ip_mc_dec_group(in_dev, 428 *(__be32 *)(mgid->raw + 12)); 429 } 430 rtnl_unlock(); 431 } 432 return (in_dev) ? 0 : -ENODEV; 433 } 434 435 static void _cma_attach_to_dev(struct rdma_id_private *id_priv, 436 struct cma_device *cma_dev) 437 { 438 cma_ref_dev(cma_dev); 439 id_priv->cma_dev = cma_dev; 440 id_priv->gid_type = 0; 441 id_priv->id.device = cma_dev->device; 442 id_priv->id.route.addr.dev_addr.transport = 443 rdma_node_get_transport(cma_dev->device->node_type); 444 list_add_tail(&id_priv->list, &cma_dev->id_list); 445 } 446 447 static void cma_attach_to_dev(struct rdma_id_private *id_priv, 448 struct cma_device *cma_dev) 449 { 450 _cma_attach_to_dev(id_priv, cma_dev); 451 id_priv->gid_type = 452 cma_dev->default_gid_type[id_priv->id.port_num - 453 rdma_start_port(cma_dev->device)]; 454 } 455 456 void cma_deref_dev(struct cma_device *cma_dev) 457 { 458 if (atomic_dec_and_test(&cma_dev->refcount)) 459 complete(&cma_dev->comp); 460 } 461 462 static inline void release_mc(struct kref *kref) 463 { 464 struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref); 465 466 kfree(mc->multicast.ib); 467 kfree(mc); 468 } 469 470 static void cma_release_dev(struct rdma_id_private *id_priv) 471 { 472 mutex_lock(&lock); 473 list_del(&id_priv->list); 474 cma_deref_dev(id_priv->cma_dev); 475 id_priv->cma_dev = NULL; 476 mutex_unlock(&lock); 477 } 478 479 static inline struct sockaddr *cma_src_addr(struct rdma_id_private *id_priv) 480 { 481 return (struct sockaddr *) &id_priv->id.route.addr.src_addr; 482 } 483 484 static inline struct sockaddr *cma_dst_addr(struct rdma_id_private *id_priv) 485 { 486 return (struct sockaddr *) &id_priv->id.route.addr.dst_addr; 487 } 488 489 static inline unsigned short cma_family(struct rdma_id_private *id_priv) 490 { 491 return id_priv->id.route.addr.src_addr.ss_family; 492 } 493 494 static int cma_set_qkey(struct rdma_id_private *id_priv, u32 qkey) 495 { 496 struct ib_sa_mcmember_rec rec; 497 int ret = 0; 498 499 if (id_priv->qkey) { 500 if (qkey && id_priv->qkey != qkey) 501 return -EINVAL; 502 return 0; 503 } 504 505 if (qkey) { 506 id_priv->qkey = qkey; 507 return 0; 508 } 509 510 switch (id_priv->id.ps) { 511 case RDMA_PS_UDP: 512 case RDMA_PS_IB: 513 id_priv->qkey = RDMA_UDP_QKEY; 514 break; 515 case RDMA_PS_IPOIB: 516 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid); 517 ret = ib_sa_get_mcmember_rec(id_priv->id.device, 518 id_priv->id.port_num, &rec.mgid, 519 &rec); 520 if (!ret) 521 id_priv->qkey = be32_to_cpu(rec.qkey); 522 break; 523 default: 524 break; 525 } 526 return ret; 527 } 528 529 static void cma_translate_ib(struct sockaddr_ib *sib, struct rdma_dev_addr *dev_addr) 530 { 531 dev_addr->dev_type = ARPHRD_INFINIBAND; 532 rdma_addr_set_sgid(dev_addr, (union ib_gid *) &sib->sib_addr); 533 ib_addr_set_pkey(dev_addr, ntohs(sib->sib_pkey)); 534 } 535 536 static int cma_translate_addr(struct sockaddr *addr, struct rdma_dev_addr *dev_addr) 537 { 538 int ret; 539 540 if (addr->sa_family != AF_IB) { 541 ret = rdma_translate_ip(addr, dev_addr, NULL); 542 } else { 543 cma_translate_ib((struct sockaddr_ib *) addr, dev_addr); 544 ret = 0; 545 } 546 547 return ret; 548 } 549 550 static inline int cma_validate_port(struct ib_device *device, u8 port, 551 enum ib_gid_type gid_type, 552 union ib_gid *gid, int dev_type, 553 int bound_if_index) 554 { 555 int ret = -ENODEV; 556 struct net_device *ndev = NULL; 557 558 if ((dev_type == ARPHRD_INFINIBAND) && !rdma_protocol_ib(device, port)) 559 return ret; 560 561 if ((dev_type != ARPHRD_INFINIBAND) && rdma_protocol_ib(device, port)) 562 return ret; 563 564 if (dev_type == ARPHRD_ETHER && rdma_protocol_roce(device, port)) { 565 ndev = dev_get_by_index(&init_net, bound_if_index); 566 if (ndev && ndev->flags & IFF_LOOPBACK) { 567 pr_info("detected loopback device\n"); 568 dev_put(ndev); 569 570 if (!device->get_netdev) 571 return -EOPNOTSUPP; 572 573 ndev = device->get_netdev(device, port); 574 if (!ndev) 575 return -ENODEV; 576 } 577 } else { 578 gid_type = IB_GID_TYPE_IB; 579 } 580 581 ret = ib_find_cached_gid_by_port(device, gid, gid_type, port, 582 ndev, NULL); 583 584 if (ndev) 585 dev_put(ndev); 586 587 return ret; 588 } 589 590 static int cma_acquire_dev(struct rdma_id_private *id_priv, 591 struct rdma_id_private *listen_id_priv) 592 { 593 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 594 struct cma_device *cma_dev; 595 union ib_gid gid, iboe_gid, *gidp; 596 int ret = -ENODEV; 597 u8 port; 598 599 if (dev_addr->dev_type != ARPHRD_INFINIBAND && 600 id_priv->id.ps == RDMA_PS_IPOIB) 601 return -EINVAL; 602 603 mutex_lock(&lock); 604 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr, 605 &iboe_gid); 606 607 memcpy(&gid, dev_addr->src_dev_addr + 608 rdma_addr_gid_offset(dev_addr), sizeof gid); 609 610 if (listen_id_priv) { 611 cma_dev = listen_id_priv->cma_dev; 612 port = listen_id_priv->id.port_num; 613 gidp = rdma_protocol_roce(cma_dev->device, port) ? 614 &iboe_gid : &gid; 615 616 ret = cma_validate_port(cma_dev->device, port, 617 rdma_protocol_ib(cma_dev->device, port) ? 618 IB_GID_TYPE_IB : 619 listen_id_priv->gid_type, gidp, 620 dev_addr->dev_type, 621 dev_addr->bound_dev_if); 622 if (!ret) { 623 id_priv->id.port_num = port; 624 goto out; 625 } 626 } 627 628 list_for_each_entry(cma_dev, &dev_list, list) { 629 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) { 630 if (listen_id_priv && 631 listen_id_priv->cma_dev == cma_dev && 632 listen_id_priv->id.port_num == port) 633 continue; 634 635 gidp = rdma_protocol_roce(cma_dev->device, port) ? 636 &iboe_gid : &gid; 637 638 ret = cma_validate_port(cma_dev->device, port, 639 rdma_protocol_ib(cma_dev->device, port) ? 640 IB_GID_TYPE_IB : 641 cma_dev->default_gid_type[port - 1], 642 gidp, dev_addr->dev_type, 643 dev_addr->bound_dev_if); 644 if (!ret) { 645 id_priv->id.port_num = port; 646 goto out; 647 } 648 } 649 } 650 651 out: 652 if (!ret) 653 cma_attach_to_dev(id_priv, cma_dev); 654 655 mutex_unlock(&lock); 656 return ret; 657 } 658 659 /* 660 * Select the source IB device and address to reach the destination IB address. 661 */ 662 static int cma_resolve_ib_dev(struct rdma_id_private *id_priv) 663 { 664 struct cma_device *cma_dev, *cur_dev; 665 struct sockaddr_ib *addr; 666 union ib_gid gid, sgid, *dgid; 667 u16 pkey, index; 668 u8 p; 669 int i; 670 671 cma_dev = NULL; 672 addr = (struct sockaddr_ib *) cma_dst_addr(id_priv); 673 dgid = (union ib_gid *) &addr->sib_addr; 674 pkey = ntohs(addr->sib_pkey); 675 676 list_for_each_entry(cur_dev, &dev_list, list) { 677 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) { 678 if (!rdma_cap_af_ib(cur_dev->device, p)) 679 continue; 680 681 if (ib_find_cached_pkey(cur_dev->device, p, pkey, &index)) 682 continue; 683 684 for (i = 0; !ib_get_cached_gid(cur_dev->device, p, i, 685 &gid, NULL); 686 i++) { 687 if (!memcmp(&gid, dgid, sizeof(gid))) { 688 cma_dev = cur_dev; 689 sgid = gid; 690 id_priv->id.port_num = p; 691 goto found; 692 } 693 694 if (!cma_dev && (gid.global.subnet_prefix == 695 dgid->global.subnet_prefix)) { 696 cma_dev = cur_dev; 697 sgid = gid; 698 id_priv->id.port_num = p; 699 } 700 } 701 } 702 } 703 704 if (!cma_dev) 705 return -ENODEV; 706 707 found: 708 cma_attach_to_dev(id_priv, cma_dev); 709 addr = (struct sockaddr_ib *) cma_src_addr(id_priv); 710 memcpy(&addr->sib_addr, &sgid, sizeof sgid); 711 cma_translate_ib(addr, &id_priv->id.route.addr.dev_addr); 712 return 0; 713 } 714 715 static void cma_deref_id(struct rdma_id_private *id_priv) 716 { 717 if (atomic_dec_and_test(&id_priv->refcount)) 718 complete(&id_priv->comp); 719 } 720 721 struct rdma_cm_id *rdma_create_id(struct net *net, 722 rdma_cm_event_handler event_handler, 723 void *context, enum rdma_port_space ps, 724 enum ib_qp_type qp_type) 725 { 726 struct rdma_id_private *id_priv; 727 728 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL); 729 if (!id_priv) 730 return ERR_PTR(-ENOMEM); 731 732 id_priv->owner = task_pid_nr(current); 733 id_priv->state = RDMA_CM_IDLE; 734 id_priv->id.context = context; 735 id_priv->id.event_handler = event_handler; 736 id_priv->id.ps = ps; 737 id_priv->id.qp_type = qp_type; 738 spin_lock_init(&id_priv->lock); 739 mutex_init(&id_priv->qp_mutex); 740 init_completion(&id_priv->comp); 741 atomic_set(&id_priv->refcount, 1); 742 mutex_init(&id_priv->handler_mutex); 743 INIT_LIST_HEAD(&id_priv->listen_list); 744 INIT_LIST_HEAD(&id_priv->mc_list); 745 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num); 746 id_priv->id.route.addr.dev_addr.net = get_net(net); 747 748 return &id_priv->id; 749 } 750 EXPORT_SYMBOL(rdma_create_id); 751 752 static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp) 753 { 754 struct ib_qp_attr qp_attr; 755 int qp_attr_mask, ret; 756 757 qp_attr.qp_state = IB_QPS_INIT; 758 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 759 if (ret) 760 return ret; 761 762 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); 763 if (ret) 764 return ret; 765 766 qp_attr.qp_state = IB_QPS_RTR; 767 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE); 768 if (ret) 769 return ret; 770 771 qp_attr.qp_state = IB_QPS_RTS; 772 qp_attr.sq_psn = 0; 773 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN); 774 775 return ret; 776 } 777 778 static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp) 779 { 780 struct ib_qp_attr qp_attr; 781 int qp_attr_mask, ret; 782 783 qp_attr.qp_state = IB_QPS_INIT; 784 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 785 if (ret) 786 return ret; 787 788 return ib_modify_qp(qp, &qp_attr, qp_attr_mask); 789 } 790 791 int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd, 792 struct ib_qp_init_attr *qp_init_attr) 793 { 794 struct rdma_id_private *id_priv; 795 struct ib_qp *qp; 796 int ret; 797 798 id_priv = container_of(id, struct rdma_id_private, id); 799 if (id->device != pd->device) 800 return -EINVAL; 801 802 qp_init_attr->port_num = id->port_num; 803 qp = ib_create_qp(pd, qp_init_attr); 804 if (IS_ERR(qp)) 805 return PTR_ERR(qp); 806 807 if (id->qp_type == IB_QPT_UD) 808 ret = cma_init_ud_qp(id_priv, qp); 809 else 810 ret = cma_init_conn_qp(id_priv, qp); 811 if (ret) 812 goto err; 813 814 id->qp = qp; 815 id_priv->qp_num = qp->qp_num; 816 id_priv->srq = (qp->srq != NULL); 817 return 0; 818 err: 819 ib_destroy_qp(qp); 820 return ret; 821 } 822 EXPORT_SYMBOL(rdma_create_qp); 823 824 void rdma_destroy_qp(struct rdma_cm_id *id) 825 { 826 struct rdma_id_private *id_priv; 827 828 id_priv = container_of(id, struct rdma_id_private, id); 829 mutex_lock(&id_priv->qp_mutex); 830 ib_destroy_qp(id_priv->id.qp); 831 id_priv->id.qp = NULL; 832 mutex_unlock(&id_priv->qp_mutex); 833 } 834 EXPORT_SYMBOL(rdma_destroy_qp); 835 836 static int cma_modify_qp_rtr(struct rdma_id_private *id_priv, 837 struct rdma_conn_param *conn_param) 838 { 839 struct ib_qp_attr qp_attr; 840 int qp_attr_mask, ret; 841 union ib_gid sgid; 842 843 mutex_lock(&id_priv->qp_mutex); 844 if (!id_priv->id.qp) { 845 ret = 0; 846 goto out; 847 } 848 849 /* Need to update QP attributes from default values. */ 850 qp_attr.qp_state = IB_QPS_INIT; 851 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 852 if (ret) 853 goto out; 854 855 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); 856 if (ret) 857 goto out; 858 859 qp_attr.qp_state = IB_QPS_RTR; 860 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 861 if (ret) 862 goto out; 863 864 ret = ib_query_gid(id_priv->id.device, id_priv->id.port_num, 865 qp_attr.ah_attr.grh.sgid_index, &sgid, NULL); 866 if (ret) 867 goto out; 868 869 BUG_ON(id_priv->cma_dev->device != id_priv->id.device); 870 871 if (conn_param) 872 qp_attr.max_dest_rd_atomic = conn_param->responder_resources; 873 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); 874 out: 875 mutex_unlock(&id_priv->qp_mutex); 876 return ret; 877 } 878 879 static int cma_modify_qp_rts(struct rdma_id_private *id_priv, 880 struct rdma_conn_param *conn_param) 881 { 882 struct ib_qp_attr qp_attr; 883 int qp_attr_mask, ret; 884 885 mutex_lock(&id_priv->qp_mutex); 886 if (!id_priv->id.qp) { 887 ret = 0; 888 goto out; 889 } 890 891 qp_attr.qp_state = IB_QPS_RTS; 892 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 893 if (ret) 894 goto out; 895 896 if (conn_param) 897 qp_attr.max_rd_atomic = conn_param->initiator_depth; 898 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); 899 out: 900 mutex_unlock(&id_priv->qp_mutex); 901 return ret; 902 } 903 904 static int cma_modify_qp_err(struct rdma_id_private *id_priv) 905 { 906 struct ib_qp_attr qp_attr; 907 int ret; 908 909 mutex_lock(&id_priv->qp_mutex); 910 if (!id_priv->id.qp) { 911 ret = 0; 912 goto out; 913 } 914 915 qp_attr.qp_state = IB_QPS_ERR; 916 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE); 917 out: 918 mutex_unlock(&id_priv->qp_mutex); 919 return ret; 920 } 921 922 static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv, 923 struct ib_qp_attr *qp_attr, int *qp_attr_mask) 924 { 925 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 926 int ret; 927 u16 pkey; 928 929 if (rdma_cap_eth_ah(id_priv->id.device, id_priv->id.port_num)) 930 pkey = 0xffff; 931 else 932 pkey = ib_addr_get_pkey(dev_addr); 933 934 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num, 935 pkey, &qp_attr->pkey_index); 936 if (ret) 937 return ret; 938 939 qp_attr->port_num = id_priv->id.port_num; 940 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT; 941 942 if (id_priv->id.qp_type == IB_QPT_UD) { 943 ret = cma_set_qkey(id_priv, 0); 944 if (ret) 945 return ret; 946 947 qp_attr->qkey = id_priv->qkey; 948 *qp_attr_mask |= IB_QP_QKEY; 949 } else { 950 qp_attr->qp_access_flags = 0; 951 *qp_attr_mask |= IB_QP_ACCESS_FLAGS; 952 } 953 return 0; 954 } 955 956 int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr, 957 int *qp_attr_mask) 958 { 959 struct rdma_id_private *id_priv; 960 int ret = 0; 961 962 id_priv = container_of(id, struct rdma_id_private, id); 963 if (rdma_cap_ib_cm(id->device, id->port_num)) { 964 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD)) 965 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask); 966 else 967 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr, 968 qp_attr_mask); 969 970 if (qp_attr->qp_state == IB_QPS_RTR) 971 qp_attr->rq_psn = id_priv->seq_num; 972 } else if (rdma_cap_iw_cm(id->device, id->port_num)) { 973 if (!id_priv->cm_id.iw) { 974 qp_attr->qp_access_flags = 0; 975 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS; 976 } else 977 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr, 978 qp_attr_mask); 979 } else 980 ret = -ENOSYS; 981 982 return ret; 983 } 984 EXPORT_SYMBOL(rdma_init_qp_attr); 985 986 static inline int cma_zero_addr(struct sockaddr *addr) 987 { 988 switch (addr->sa_family) { 989 case AF_INET: 990 return ipv4_is_zeronet(((struct sockaddr_in *)addr)->sin_addr.s_addr); 991 case AF_INET6: 992 return ipv6_addr_any(&((struct sockaddr_in6 *) addr)->sin6_addr); 993 case AF_IB: 994 return ib_addr_any(&((struct sockaddr_ib *) addr)->sib_addr); 995 default: 996 return 0; 997 } 998 } 999 1000 static inline int cma_loopback_addr(struct sockaddr *addr) 1001 { 1002 switch (addr->sa_family) { 1003 case AF_INET: 1004 return ipv4_is_loopback(((struct sockaddr_in *) addr)->sin_addr.s_addr); 1005 case AF_INET6: 1006 return ipv6_addr_loopback(&((struct sockaddr_in6 *) addr)->sin6_addr); 1007 case AF_IB: 1008 return ib_addr_loopback(&((struct sockaddr_ib *) addr)->sib_addr); 1009 default: 1010 return 0; 1011 } 1012 } 1013 1014 static inline int cma_any_addr(struct sockaddr *addr) 1015 { 1016 return cma_zero_addr(addr) || cma_loopback_addr(addr); 1017 } 1018 1019 static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst) 1020 { 1021 if (src->sa_family != dst->sa_family) 1022 return -1; 1023 1024 switch (src->sa_family) { 1025 case AF_INET: 1026 return ((struct sockaddr_in *) src)->sin_addr.s_addr != 1027 ((struct sockaddr_in *) dst)->sin_addr.s_addr; 1028 case AF_INET6: 1029 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr, 1030 &((struct sockaddr_in6 *) dst)->sin6_addr); 1031 default: 1032 return ib_addr_cmp(&((struct sockaddr_ib *) src)->sib_addr, 1033 &((struct sockaddr_ib *) dst)->sib_addr); 1034 } 1035 } 1036 1037 static __be16 cma_port(struct sockaddr *addr) 1038 { 1039 struct sockaddr_ib *sib; 1040 1041 switch (addr->sa_family) { 1042 case AF_INET: 1043 return ((struct sockaddr_in *) addr)->sin_port; 1044 case AF_INET6: 1045 return ((struct sockaddr_in6 *) addr)->sin6_port; 1046 case AF_IB: 1047 sib = (struct sockaddr_ib *) addr; 1048 return htons((u16) (be64_to_cpu(sib->sib_sid) & 1049 be64_to_cpu(sib->sib_sid_mask))); 1050 default: 1051 return 0; 1052 } 1053 } 1054 1055 static inline int cma_any_port(struct sockaddr *addr) 1056 { 1057 return !cma_port(addr); 1058 } 1059 1060 static void cma_save_ib_info(struct sockaddr *src_addr, 1061 struct sockaddr *dst_addr, 1062 struct rdma_cm_id *listen_id, 1063 struct ib_sa_path_rec *path) 1064 { 1065 struct sockaddr_ib *listen_ib, *ib; 1066 1067 listen_ib = (struct sockaddr_ib *) &listen_id->route.addr.src_addr; 1068 if (src_addr) { 1069 ib = (struct sockaddr_ib *)src_addr; 1070 ib->sib_family = AF_IB; 1071 if (path) { 1072 ib->sib_pkey = path->pkey; 1073 ib->sib_flowinfo = path->flow_label; 1074 memcpy(&ib->sib_addr, &path->sgid, 16); 1075 ib->sib_sid = path->service_id; 1076 ib->sib_scope_id = 0; 1077 } else { 1078 ib->sib_pkey = listen_ib->sib_pkey; 1079 ib->sib_flowinfo = listen_ib->sib_flowinfo; 1080 ib->sib_addr = listen_ib->sib_addr; 1081 ib->sib_sid = listen_ib->sib_sid; 1082 ib->sib_scope_id = listen_ib->sib_scope_id; 1083 } 1084 ib->sib_sid_mask = cpu_to_be64(0xffffffffffffffffULL); 1085 } 1086 if (dst_addr) { 1087 ib = (struct sockaddr_ib *)dst_addr; 1088 ib->sib_family = AF_IB; 1089 if (path) { 1090 ib->sib_pkey = path->pkey; 1091 ib->sib_flowinfo = path->flow_label; 1092 memcpy(&ib->sib_addr, &path->dgid, 16); 1093 } 1094 } 1095 } 1096 1097 static void cma_save_ip4_info(struct sockaddr *src_addr, 1098 struct sockaddr *dst_addr, 1099 struct cma_hdr *hdr, 1100 __be16 local_port) 1101 { 1102 struct sockaddr_in *ip4; 1103 1104 if (src_addr) { 1105 ip4 = (struct sockaddr_in *)src_addr; 1106 ip4->sin_family = AF_INET; 1107 ip4->sin_addr.s_addr = hdr->dst_addr.ip4.addr; 1108 ip4->sin_port = local_port; 1109 } 1110 1111 if (dst_addr) { 1112 ip4 = (struct sockaddr_in *)dst_addr; 1113 ip4->sin_family = AF_INET; 1114 ip4->sin_addr.s_addr = hdr->src_addr.ip4.addr; 1115 ip4->sin_port = hdr->port; 1116 } 1117 } 1118 1119 static void cma_save_ip6_info(struct sockaddr *src_addr, 1120 struct sockaddr *dst_addr, 1121 struct cma_hdr *hdr, 1122 __be16 local_port) 1123 { 1124 struct sockaddr_in6 *ip6; 1125 1126 if (src_addr) { 1127 ip6 = (struct sockaddr_in6 *)src_addr; 1128 ip6->sin6_family = AF_INET6; 1129 ip6->sin6_addr = hdr->dst_addr.ip6; 1130 ip6->sin6_port = local_port; 1131 } 1132 1133 if (dst_addr) { 1134 ip6 = (struct sockaddr_in6 *)dst_addr; 1135 ip6->sin6_family = AF_INET6; 1136 ip6->sin6_addr = hdr->src_addr.ip6; 1137 ip6->sin6_port = hdr->port; 1138 } 1139 } 1140 1141 static u16 cma_port_from_service_id(__be64 service_id) 1142 { 1143 return (u16)be64_to_cpu(service_id); 1144 } 1145 1146 static int cma_save_ip_info(struct sockaddr *src_addr, 1147 struct sockaddr *dst_addr, 1148 struct ib_cm_event *ib_event, 1149 __be64 service_id) 1150 { 1151 struct cma_hdr *hdr; 1152 __be16 port; 1153 1154 hdr = ib_event->private_data; 1155 if (hdr->cma_version != CMA_VERSION) 1156 return -EINVAL; 1157 1158 port = htons(cma_port_from_service_id(service_id)); 1159 1160 switch (cma_get_ip_ver(hdr)) { 1161 case 4: 1162 cma_save_ip4_info(src_addr, dst_addr, hdr, port); 1163 break; 1164 case 6: 1165 cma_save_ip6_info(src_addr, dst_addr, hdr, port); 1166 break; 1167 default: 1168 return -EAFNOSUPPORT; 1169 } 1170 1171 return 0; 1172 } 1173 1174 static int cma_save_net_info(struct sockaddr *src_addr, 1175 struct sockaddr *dst_addr, 1176 struct rdma_cm_id *listen_id, 1177 struct ib_cm_event *ib_event, 1178 sa_family_t sa_family, __be64 service_id) 1179 { 1180 if (sa_family == AF_IB) { 1181 if (ib_event->event == IB_CM_REQ_RECEIVED) 1182 cma_save_ib_info(src_addr, dst_addr, listen_id, 1183 ib_event->param.req_rcvd.primary_path); 1184 else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) 1185 cma_save_ib_info(src_addr, dst_addr, listen_id, NULL); 1186 return 0; 1187 } 1188 1189 return cma_save_ip_info(src_addr, dst_addr, ib_event, service_id); 1190 } 1191 1192 static int cma_save_req_info(const struct ib_cm_event *ib_event, 1193 struct cma_req_info *req) 1194 { 1195 const struct ib_cm_req_event_param *req_param = 1196 &ib_event->param.req_rcvd; 1197 const struct ib_cm_sidr_req_event_param *sidr_param = 1198 &ib_event->param.sidr_req_rcvd; 1199 1200 switch (ib_event->event) { 1201 case IB_CM_REQ_RECEIVED: 1202 req->device = req_param->listen_id->device; 1203 req->port = req_param->port; 1204 memcpy(&req->local_gid, &req_param->primary_path->sgid, 1205 sizeof(req->local_gid)); 1206 req->has_gid = true; 1207 req->service_id = req_param->primary_path->service_id; 1208 req->pkey = be16_to_cpu(req_param->primary_path->pkey); 1209 if (req->pkey != req_param->bth_pkey) 1210 pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and primary path P_Key (0x%x)\n" 1211 "RDMA CMA: in the future this may cause the request to be dropped\n", 1212 req_param->bth_pkey, req->pkey); 1213 break; 1214 case IB_CM_SIDR_REQ_RECEIVED: 1215 req->device = sidr_param->listen_id->device; 1216 req->port = sidr_param->port; 1217 req->has_gid = false; 1218 req->service_id = sidr_param->service_id; 1219 req->pkey = sidr_param->pkey; 1220 if (req->pkey != sidr_param->bth_pkey) 1221 pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and SIDR request payload P_Key (0x%x)\n" 1222 "RDMA CMA: in the future this may cause the request to be dropped\n", 1223 sidr_param->bth_pkey, req->pkey); 1224 break; 1225 default: 1226 return -EINVAL; 1227 } 1228 1229 return 0; 1230 } 1231 1232 static bool validate_ipv4_net_dev(struct net_device *net_dev, 1233 const struct sockaddr_in *dst_addr, 1234 const struct sockaddr_in *src_addr) 1235 { 1236 __be32 daddr = dst_addr->sin_addr.s_addr, 1237 saddr = src_addr->sin_addr.s_addr; 1238 struct fib_result res; 1239 struct flowi4 fl4; 1240 int err; 1241 bool ret; 1242 1243 if (ipv4_is_multicast(saddr) || ipv4_is_lbcast(saddr) || 1244 ipv4_is_lbcast(daddr) || ipv4_is_zeronet(saddr) || 1245 ipv4_is_zeronet(daddr) || ipv4_is_loopback(daddr) || 1246 ipv4_is_loopback(saddr)) 1247 return false; 1248 1249 memset(&fl4, 0, sizeof(fl4)); 1250 fl4.flowi4_iif = net_dev->ifindex; 1251 fl4.daddr = daddr; 1252 fl4.saddr = saddr; 1253 1254 rcu_read_lock(); 1255 err = fib_lookup(dev_net(net_dev), &fl4, &res, 0); 1256 ret = err == 0 && FIB_RES_DEV(res) == net_dev; 1257 rcu_read_unlock(); 1258 1259 return ret; 1260 } 1261 1262 static bool validate_ipv6_net_dev(struct net_device *net_dev, 1263 const struct sockaddr_in6 *dst_addr, 1264 const struct sockaddr_in6 *src_addr) 1265 { 1266 #if IS_ENABLED(CONFIG_IPV6) 1267 const int strict = ipv6_addr_type(&dst_addr->sin6_addr) & 1268 IPV6_ADDR_LINKLOCAL; 1269 struct rt6_info *rt = rt6_lookup(dev_net(net_dev), &dst_addr->sin6_addr, 1270 &src_addr->sin6_addr, net_dev->ifindex, 1271 strict); 1272 bool ret; 1273 1274 if (!rt) 1275 return false; 1276 1277 ret = rt->rt6i_idev->dev == net_dev; 1278 ip6_rt_put(rt); 1279 1280 return ret; 1281 #else 1282 return false; 1283 #endif 1284 } 1285 1286 static bool validate_net_dev(struct net_device *net_dev, 1287 const struct sockaddr *daddr, 1288 const struct sockaddr *saddr) 1289 { 1290 const struct sockaddr_in *daddr4 = (const struct sockaddr_in *)daddr; 1291 const struct sockaddr_in *saddr4 = (const struct sockaddr_in *)saddr; 1292 const struct sockaddr_in6 *daddr6 = (const struct sockaddr_in6 *)daddr; 1293 const struct sockaddr_in6 *saddr6 = (const struct sockaddr_in6 *)saddr; 1294 1295 switch (daddr->sa_family) { 1296 case AF_INET: 1297 return saddr->sa_family == AF_INET && 1298 validate_ipv4_net_dev(net_dev, daddr4, saddr4); 1299 1300 case AF_INET6: 1301 return saddr->sa_family == AF_INET6 && 1302 validate_ipv6_net_dev(net_dev, daddr6, saddr6); 1303 1304 default: 1305 return false; 1306 } 1307 } 1308 1309 static struct net_device *cma_get_net_dev(struct ib_cm_event *ib_event, 1310 const struct cma_req_info *req) 1311 { 1312 struct sockaddr_storage listen_addr_storage, src_addr_storage; 1313 struct sockaddr *listen_addr = (struct sockaddr *)&listen_addr_storage, 1314 *src_addr = (struct sockaddr *)&src_addr_storage; 1315 struct net_device *net_dev; 1316 const union ib_gid *gid = req->has_gid ? &req->local_gid : NULL; 1317 int err; 1318 1319 err = cma_save_ip_info(listen_addr, src_addr, ib_event, 1320 req->service_id); 1321 if (err) 1322 return ERR_PTR(err); 1323 1324 net_dev = ib_get_net_dev_by_params(req->device, req->port, req->pkey, 1325 gid, listen_addr); 1326 if (!net_dev) 1327 return ERR_PTR(-ENODEV); 1328 1329 if (!validate_net_dev(net_dev, listen_addr, src_addr)) { 1330 dev_put(net_dev); 1331 return ERR_PTR(-EHOSTUNREACH); 1332 } 1333 1334 return net_dev; 1335 } 1336 1337 static enum rdma_port_space rdma_ps_from_service_id(__be64 service_id) 1338 { 1339 return (be64_to_cpu(service_id) >> 16) & 0xffff; 1340 } 1341 1342 static bool cma_match_private_data(struct rdma_id_private *id_priv, 1343 const struct cma_hdr *hdr) 1344 { 1345 struct sockaddr *addr = cma_src_addr(id_priv); 1346 __be32 ip4_addr; 1347 struct in6_addr ip6_addr; 1348 1349 if (cma_any_addr(addr) && !id_priv->afonly) 1350 return true; 1351 1352 switch (addr->sa_family) { 1353 case AF_INET: 1354 ip4_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr; 1355 if (cma_get_ip_ver(hdr) != 4) 1356 return false; 1357 if (!cma_any_addr(addr) && 1358 hdr->dst_addr.ip4.addr != ip4_addr) 1359 return false; 1360 break; 1361 case AF_INET6: 1362 ip6_addr = ((struct sockaddr_in6 *)addr)->sin6_addr; 1363 if (cma_get_ip_ver(hdr) != 6) 1364 return false; 1365 if (!cma_any_addr(addr) && 1366 memcmp(&hdr->dst_addr.ip6, &ip6_addr, sizeof(ip6_addr))) 1367 return false; 1368 break; 1369 case AF_IB: 1370 return true; 1371 default: 1372 return false; 1373 } 1374 1375 return true; 1376 } 1377 1378 static bool cma_protocol_roce_dev_port(struct ib_device *device, int port_num) 1379 { 1380 enum rdma_link_layer ll = rdma_port_get_link_layer(device, port_num); 1381 enum rdma_transport_type transport = 1382 rdma_node_get_transport(device->node_type); 1383 1384 return ll == IB_LINK_LAYER_ETHERNET && transport == RDMA_TRANSPORT_IB; 1385 } 1386 1387 static bool cma_protocol_roce(const struct rdma_cm_id *id) 1388 { 1389 struct ib_device *device = id->device; 1390 const int port_num = id->port_num ?: rdma_start_port(device); 1391 1392 return cma_protocol_roce_dev_port(device, port_num); 1393 } 1394 1395 static bool cma_match_net_dev(const struct rdma_cm_id *id, 1396 const struct net_device *net_dev, 1397 u8 port_num) 1398 { 1399 const struct rdma_addr *addr = &id->route.addr; 1400 1401 if (!net_dev) 1402 /* This request is an AF_IB request or a RoCE request */ 1403 return (!id->port_num || id->port_num == port_num) && 1404 (addr->src_addr.ss_family == AF_IB || 1405 cma_protocol_roce_dev_port(id->device, port_num)); 1406 1407 return !addr->dev_addr.bound_dev_if || 1408 (net_eq(dev_net(net_dev), addr->dev_addr.net) && 1409 addr->dev_addr.bound_dev_if == net_dev->ifindex); 1410 } 1411 1412 static struct rdma_id_private *cma_find_listener( 1413 const struct rdma_bind_list *bind_list, 1414 const struct ib_cm_id *cm_id, 1415 const struct ib_cm_event *ib_event, 1416 const struct cma_req_info *req, 1417 const struct net_device *net_dev) 1418 { 1419 struct rdma_id_private *id_priv, *id_priv_dev; 1420 1421 if (!bind_list) 1422 return ERR_PTR(-EINVAL); 1423 1424 hlist_for_each_entry(id_priv, &bind_list->owners, node) { 1425 if (cma_match_private_data(id_priv, ib_event->private_data)) { 1426 if (id_priv->id.device == cm_id->device && 1427 cma_match_net_dev(&id_priv->id, net_dev, req->port)) 1428 return id_priv; 1429 list_for_each_entry(id_priv_dev, 1430 &id_priv->listen_list, 1431 listen_list) { 1432 if (id_priv_dev->id.device == cm_id->device && 1433 cma_match_net_dev(&id_priv_dev->id, net_dev, req->port)) 1434 return id_priv_dev; 1435 } 1436 } 1437 } 1438 1439 return ERR_PTR(-EINVAL); 1440 } 1441 1442 static struct rdma_id_private *cma_id_from_event(struct ib_cm_id *cm_id, 1443 struct ib_cm_event *ib_event, 1444 struct net_device **net_dev) 1445 { 1446 struct cma_req_info req; 1447 struct rdma_bind_list *bind_list; 1448 struct rdma_id_private *id_priv; 1449 int err; 1450 1451 err = cma_save_req_info(ib_event, &req); 1452 if (err) 1453 return ERR_PTR(err); 1454 1455 *net_dev = cma_get_net_dev(ib_event, &req); 1456 if (IS_ERR(*net_dev)) { 1457 if (PTR_ERR(*net_dev) == -EAFNOSUPPORT) { 1458 /* Assuming the protocol is AF_IB */ 1459 *net_dev = NULL; 1460 } else if (cma_protocol_roce_dev_port(req.device, req.port)) { 1461 /* TODO find the net dev matching the request parameters 1462 * through the RoCE GID table */ 1463 *net_dev = NULL; 1464 } else { 1465 return ERR_CAST(*net_dev); 1466 } 1467 } 1468 1469 bind_list = cma_ps_find(*net_dev ? dev_net(*net_dev) : &init_net, 1470 rdma_ps_from_service_id(req.service_id), 1471 cma_port_from_service_id(req.service_id)); 1472 id_priv = cma_find_listener(bind_list, cm_id, ib_event, &req, *net_dev); 1473 if (IS_ERR(id_priv) && *net_dev) { 1474 dev_put(*net_dev); 1475 *net_dev = NULL; 1476 } 1477 1478 return id_priv; 1479 } 1480 1481 static inline int cma_user_data_offset(struct rdma_id_private *id_priv) 1482 { 1483 return cma_family(id_priv) == AF_IB ? 0 : sizeof(struct cma_hdr); 1484 } 1485 1486 static void cma_cancel_route(struct rdma_id_private *id_priv) 1487 { 1488 if (rdma_cap_ib_sa(id_priv->id.device, id_priv->id.port_num)) { 1489 if (id_priv->query) 1490 ib_sa_cancel_query(id_priv->query_id, id_priv->query); 1491 } 1492 } 1493 1494 static void cma_cancel_listens(struct rdma_id_private *id_priv) 1495 { 1496 struct rdma_id_private *dev_id_priv; 1497 1498 /* 1499 * Remove from listen_any_list to prevent added devices from spawning 1500 * additional listen requests. 1501 */ 1502 mutex_lock(&lock); 1503 list_del(&id_priv->list); 1504 1505 while (!list_empty(&id_priv->listen_list)) { 1506 dev_id_priv = list_entry(id_priv->listen_list.next, 1507 struct rdma_id_private, listen_list); 1508 /* sync with device removal to avoid duplicate destruction */ 1509 list_del_init(&dev_id_priv->list); 1510 list_del(&dev_id_priv->listen_list); 1511 mutex_unlock(&lock); 1512 1513 rdma_destroy_id(&dev_id_priv->id); 1514 mutex_lock(&lock); 1515 } 1516 mutex_unlock(&lock); 1517 } 1518 1519 static void cma_cancel_operation(struct rdma_id_private *id_priv, 1520 enum rdma_cm_state state) 1521 { 1522 switch (state) { 1523 case RDMA_CM_ADDR_QUERY: 1524 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr); 1525 break; 1526 case RDMA_CM_ROUTE_QUERY: 1527 cma_cancel_route(id_priv); 1528 break; 1529 case RDMA_CM_LISTEN: 1530 if (cma_any_addr(cma_src_addr(id_priv)) && !id_priv->cma_dev) 1531 cma_cancel_listens(id_priv); 1532 break; 1533 default: 1534 break; 1535 } 1536 } 1537 1538 static void cma_release_port(struct rdma_id_private *id_priv) 1539 { 1540 struct rdma_bind_list *bind_list = id_priv->bind_list; 1541 struct net *net = id_priv->id.route.addr.dev_addr.net; 1542 1543 if (!bind_list) 1544 return; 1545 1546 mutex_lock(&lock); 1547 hlist_del(&id_priv->node); 1548 if (hlist_empty(&bind_list->owners)) { 1549 cma_ps_remove(net, bind_list->ps, bind_list->port); 1550 kfree(bind_list); 1551 } 1552 mutex_unlock(&lock); 1553 } 1554 1555 static void cma_leave_mc_groups(struct rdma_id_private *id_priv) 1556 { 1557 struct cma_multicast *mc; 1558 1559 while (!list_empty(&id_priv->mc_list)) { 1560 mc = container_of(id_priv->mc_list.next, 1561 struct cma_multicast, list); 1562 list_del(&mc->list); 1563 if (rdma_cap_ib_mcast(id_priv->cma_dev->device, 1564 id_priv->id.port_num)) { 1565 ib_sa_free_multicast(mc->multicast.ib); 1566 kfree(mc); 1567 } else { 1568 if (mc->igmp_joined) { 1569 struct rdma_dev_addr *dev_addr = 1570 &id_priv->id.route.addr.dev_addr; 1571 struct net_device *ndev = NULL; 1572 1573 if (dev_addr->bound_dev_if) 1574 ndev = dev_get_by_index(&init_net, 1575 dev_addr->bound_dev_if); 1576 if (ndev) { 1577 cma_igmp_send(ndev, 1578 &mc->multicast.ib->rec.mgid, 1579 false); 1580 dev_put(ndev); 1581 } 1582 } 1583 kref_put(&mc->mcref, release_mc); 1584 } 1585 } 1586 } 1587 1588 void rdma_destroy_id(struct rdma_cm_id *id) 1589 { 1590 struct rdma_id_private *id_priv; 1591 enum rdma_cm_state state; 1592 1593 id_priv = container_of(id, struct rdma_id_private, id); 1594 state = cma_exch(id_priv, RDMA_CM_DESTROYING); 1595 cma_cancel_operation(id_priv, state); 1596 1597 /* 1598 * Wait for any active callback to finish. New callbacks will find 1599 * the id_priv state set to destroying and abort. 1600 */ 1601 mutex_lock(&id_priv->handler_mutex); 1602 mutex_unlock(&id_priv->handler_mutex); 1603 1604 if (id_priv->cma_dev) { 1605 if (rdma_cap_ib_cm(id_priv->id.device, 1)) { 1606 if (id_priv->cm_id.ib) 1607 ib_destroy_cm_id(id_priv->cm_id.ib); 1608 } else if (rdma_cap_iw_cm(id_priv->id.device, 1)) { 1609 if (id_priv->cm_id.iw) 1610 iw_destroy_cm_id(id_priv->cm_id.iw); 1611 } 1612 cma_leave_mc_groups(id_priv); 1613 cma_release_dev(id_priv); 1614 } 1615 1616 cma_release_port(id_priv); 1617 cma_deref_id(id_priv); 1618 wait_for_completion(&id_priv->comp); 1619 1620 if (id_priv->internal_id) 1621 cma_deref_id(id_priv->id.context); 1622 1623 kfree(id_priv->id.route.path_rec); 1624 put_net(id_priv->id.route.addr.dev_addr.net); 1625 kfree(id_priv); 1626 } 1627 EXPORT_SYMBOL(rdma_destroy_id); 1628 1629 static int cma_rep_recv(struct rdma_id_private *id_priv) 1630 { 1631 int ret; 1632 1633 ret = cma_modify_qp_rtr(id_priv, NULL); 1634 if (ret) 1635 goto reject; 1636 1637 ret = cma_modify_qp_rts(id_priv, NULL); 1638 if (ret) 1639 goto reject; 1640 1641 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0); 1642 if (ret) 1643 goto reject; 1644 1645 return 0; 1646 reject: 1647 cma_modify_qp_err(id_priv); 1648 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED, 1649 NULL, 0, NULL, 0); 1650 return ret; 1651 } 1652 1653 static void cma_set_rep_event_data(struct rdma_cm_event *event, 1654 struct ib_cm_rep_event_param *rep_data, 1655 void *private_data) 1656 { 1657 event->param.conn.private_data = private_data; 1658 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE; 1659 event->param.conn.responder_resources = rep_data->responder_resources; 1660 event->param.conn.initiator_depth = rep_data->initiator_depth; 1661 event->param.conn.flow_control = rep_data->flow_control; 1662 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count; 1663 event->param.conn.srq = rep_data->srq; 1664 event->param.conn.qp_num = rep_data->remote_qpn; 1665 } 1666 1667 static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) 1668 { 1669 struct rdma_id_private *id_priv = cm_id->context; 1670 struct rdma_cm_event event; 1671 int ret = 0; 1672 1673 mutex_lock(&id_priv->handler_mutex); 1674 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT && 1675 id_priv->state != RDMA_CM_CONNECT) || 1676 (ib_event->event == IB_CM_TIMEWAIT_EXIT && 1677 id_priv->state != RDMA_CM_DISCONNECT)) 1678 goto out; 1679 1680 memset(&event, 0, sizeof event); 1681 switch (ib_event->event) { 1682 case IB_CM_REQ_ERROR: 1683 case IB_CM_REP_ERROR: 1684 event.event = RDMA_CM_EVENT_UNREACHABLE; 1685 event.status = -ETIMEDOUT; 1686 break; 1687 case IB_CM_REP_RECEIVED: 1688 if (id_priv->id.qp) { 1689 event.status = cma_rep_recv(id_priv); 1690 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR : 1691 RDMA_CM_EVENT_ESTABLISHED; 1692 } else { 1693 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE; 1694 } 1695 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd, 1696 ib_event->private_data); 1697 break; 1698 case IB_CM_RTU_RECEIVED: 1699 case IB_CM_USER_ESTABLISHED: 1700 event.event = RDMA_CM_EVENT_ESTABLISHED; 1701 break; 1702 case IB_CM_DREQ_ERROR: 1703 event.status = -ETIMEDOUT; /* fall through */ 1704 case IB_CM_DREQ_RECEIVED: 1705 case IB_CM_DREP_RECEIVED: 1706 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT, 1707 RDMA_CM_DISCONNECT)) 1708 goto out; 1709 event.event = RDMA_CM_EVENT_DISCONNECTED; 1710 break; 1711 case IB_CM_TIMEWAIT_EXIT: 1712 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT; 1713 break; 1714 case IB_CM_MRA_RECEIVED: 1715 /* ignore event */ 1716 goto out; 1717 case IB_CM_REJ_RECEIVED: 1718 cma_modify_qp_err(id_priv); 1719 event.status = ib_event->param.rej_rcvd.reason; 1720 event.event = RDMA_CM_EVENT_REJECTED; 1721 event.param.conn.private_data = ib_event->private_data; 1722 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE; 1723 break; 1724 default: 1725 pr_err("RDMA CMA: unexpected IB CM event: %d\n", 1726 ib_event->event); 1727 goto out; 1728 } 1729 1730 ret = id_priv->id.event_handler(&id_priv->id, &event); 1731 if (ret) { 1732 /* Destroy the CM ID by returning a non-zero value. */ 1733 id_priv->cm_id.ib = NULL; 1734 cma_exch(id_priv, RDMA_CM_DESTROYING); 1735 mutex_unlock(&id_priv->handler_mutex); 1736 rdma_destroy_id(&id_priv->id); 1737 return ret; 1738 } 1739 out: 1740 mutex_unlock(&id_priv->handler_mutex); 1741 return ret; 1742 } 1743 1744 static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id, 1745 struct ib_cm_event *ib_event, 1746 struct net_device *net_dev) 1747 { 1748 struct rdma_id_private *id_priv; 1749 struct rdma_cm_id *id; 1750 struct rdma_route *rt; 1751 const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family; 1752 const __be64 service_id = 1753 ib_event->param.req_rcvd.primary_path->service_id; 1754 int ret; 1755 1756 id = rdma_create_id(listen_id->route.addr.dev_addr.net, 1757 listen_id->event_handler, listen_id->context, 1758 listen_id->ps, ib_event->param.req_rcvd.qp_type); 1759 if (IS_ERR(id)) 1760 return NULL; 1761 1762 id_priv = container_of(id, struct rdma_id_private, id); 1763 if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr, 1764 (struct sockaddr *)&id->route.addr.dst_addr, 1765 listen_id, ib_event, ss_family, service_id)) 1766 goto err; 1767 1768 rt = &id->route; 1769 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1; 1770 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths, 1771 GFP_KERNEL); 1772 if (!rt->path_rec) 1773 goto err; 1774 1775 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path; 1776 if (rt->num_paths == 2) 1777 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path; 1778 1779 if (net_dev) { 1780 ret = rdma_copy_addr(&rt->addr.dev_addr, net_dev, NULL); 1781 if (ret) 1782 goto err; 1783 } else { 1784 if (!cma_protocol_roce(listen_id) && 1785 cma_any_addr(cma_src_addr(id_priv))) { 1786 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND; 1787 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid); 1788 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey)); 1789 } else if (!cma_any_addr(cma_src_addr(id_priv))) { 1790 ret = cma_translate_addr(cma_src_addr(id_priv), &rt->addr.dev_addr); 1791 if (ret) 1792 goto err; 1793 } 1794 } 1795 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid); 1796 1797 id_priv->state = RDMA_CM_CONNECT; 1798 return id_priv; 1799 1800 err: 1801 rdma_destroy_id(id); 1802 return NULL; 1803 } 1804 1805 static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id, 1806 struct ib_cm_event *ib_event, 1807 struct net_device *net_dev) 1808 { 1809 struct rdma_id_private *id_priv; 1810 struct rdma_cm_id *id; 1811 const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family; 1812 struct net *net = listen_id->route.addr.dev_addr.net; 1813 int ret; 1814 1815 id = rdma_create_id(net, listen_id->event_handler, listen_id->context, 1816 listen_id->ps, IB_QPT_UD); 1817 if (IS_ERR(id)) 1818 return NULL; 1819 1820 id_priv = container_of(id, struct rdma_id_private, id); 1821 if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr, 1822 (struct sockaddr *)&id->route.addr.dst_addr, 1823 listen_id, ib_event, ss_family, 1824 ib_event->param.sidr_req_rcvd.service_id)) 1825 goto err; 1826 1827 if (net_dev) { 1828 ret = rdma_copy_addr(&id->route.addr.dev_addr, net_dev, NULL); 1829 if (ret) 1830 goto err; 1831 } else { 1832 if (!cma_any_addr(cma_src_addr(id_priv))) { 1833 ret = cma_translate_addr(cma_src_addr(id_priv), 1834 &id->route.addr.dev_addr); 1835 if (ret) 1836 goto err; 1837 } 1838 } 1839 1840 id_priv->state = RDMA_CM_CONNECT; 1841 return id_priv; 1842 err: 1843 rdma_destroy_id(id); 1844 return NULL; 1845 } 1846 1847 static void cma_set_req_event_data(struct rdma_cm_event *event, 1848 struct ib_cm_req_event_param *req_data, 1849 void *private_data, int offset) 1850 { 1851 event->param.conn.private_data = private_data + offset; 1852 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset; 1853 event->param.conn.responder_resources = req_data->responder_resources; 1854 event->param.conn.initiator_depth = req_data->initiator_depth; 1855 event->param.conn.flow_control = req_data->flow_control; 1856 event->param.conn.retry_count = req_data->retry_count; 1857 event->param.conn.rnr_retry_count = req_data->rnr_retry_count; 1858 event->param.conn.srq = req_data->srq; 1859 event->param.conn.qp_num = req_data->remote_qpn; 1860 } 1861 1862 static int cma_check_req_qp_type(struct rdma_cm_id *id, struct ib_cm_event *ib_event) 1863 { 1864 return (((ib_event->event == IB_CM_REQ_RECEIVED) && 1865 (ib_event->param.req_rcvd.qp_type == id->qp_type)) || 1866 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) && 1867 (id->qp_type == IB_QPT_UD)) || 1868 (!id->qp_type)); 1869 } 1870 1871 static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) 1872 { 1873 struct rdma_id_private *listen_id, *conn_id = NULL; 1874 struct rdma_cm_event event; 1875 struct net_device *net_dev; 1876 int offset, ret; 1877 1878 listen_id = cma_id_from_event(cm_id, ib_event, &net_dev); 1879 if (IS_ERR(listen_id)) 1880 return PTR_ERR(listen_id); 1881 1882 if (!cma_check_req_qp_type(&listen_id->id, ib_event)) { 1883 ret = -EINVAL; 1884 goto net_dev_put; 1885 } 1886 1887 mutex_lock(&listen_id->handler_mutex); 1888 if (listen_id->state != RDMA_CM_LISTEN) { 1889 ret = -ECONNABORTED; 1890 goto err1; 1891 } 1892 1893 memset(&event, 0, sizeof event); 1894 offset = cma_user_data_offset(listen_id); 1895 event.event = RDMA_CM_EVENT_CONNECT_REQUEST; 1896 if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) { 1897 conn_id = cma_new_udp_id(&listen_id->id, ib_event, net_dev); 1898 event.param.ud.private_data = ib_event->private_data + offset; 1899 event.param.ud.private_data_len = 1900 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset; 1901 } else { 1902 conn_id = cma_new_conn_id(&listen_id->id, ib_event, net_dev); 1903 cma_set_req_event_data(&event, &ib_event->param.req_rcvd, 1904 ib_event->private_data, offset); 1905 } 1906 if (!conn_id) { 1907 ret = -ENOMEM; 1908 goto err1; 1909 } 1910 1911 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING); 1912 ret = cma_acquire_dev(conn_id, listen_id); 1913 if (ret) 1914 goto err2; 1915 1916 conn_id->cm_id.ib = cm_id; 1917 cm_id->context = conn_id; 1918 cm_id->cm_handler = cma_ib_handler; 1919 1920 /* 1921 * Protect against the user destroying conn_id from another thread 1922 * until we're done accessing it. 1923 */ 1924 atomic_inc(&conn_id->refcount); 1925 ret = conn_id->id.event_handler(&conn_id->id, &event); 1926 if (ret) 1927 goto err3; 1928 /* 1929 * Acquire mutex to prevent user executing rdma_destroy_id() 1930 * while we're accessing the cm_id. 1931 */ 1932 mutex_lock(&lock); 1933 if (cma_comp(conn_id, RDMA_CM_CONNECT) && 1934 (conn_id->id.qp_type != IB_QPT_UD)) 1935 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0); 1936 mutex_unlock(&lock); 1937 mutex_unlock(&conn_id->handler_mutex); 1938 mutex_unlock(&listen_id->handler_mutex); 1939 cma_deref_id(conn_id); 1940 if (net_dev) 1941 dev_put(net_dev); 1942 return 0; 1943 1944 err3: 1945 cma_deref_id(conn_id); 1946 /* Destroy the CM ID by returning a non-zero value. */ 1947 conn_id->cm_id.ib = NULL; 1948 err2: 1949 cma_exch(conn_id, RDMA_CM_DESTROYING); 1950 mutex_unlock(&conn_id->handler_mutex); 1951 err1: 1952 mutex_unlock(&listen_id->handler_mutex); 1953 if (conn_id) 1954 rdma_destroy_id(&conn_id->id); 1955 1956 net_dev_put: 1957 if (net_dev) 1958 dev_put(net_dev); 1959 1960 return ret; 1961 } 1962 1963 __be64 rdma_get_service_id(struct rdma_cm_id *id, struct sockaddr *addr) 1964 { 1965 if (addr->sa_family == AF_IB) 1966 return ((struct sockaddr_ib *) addr)->sib_sid; 1967 1968 return cpu_to_be64(((u64)id->ps << 16) + be16_to_cpu(cma_port(addr))); 1969 } 1970 EXPORT_SYMBOL(rdma_get_service_id); 1971 1972 static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event) 1973 { 1974 struct rdma_id_private *id_priv = iw_id->context; 1975 struct rdma_cm_event event; 1976 int ret = 0; 1977 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr; 1978 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr; 1979 1980 mutex_lock(&id_priv->handler_mutex); 1981 if (id_priv->state != RDMA_CM_CONNECT) 1982 goto out; 1983 1984 memset(&event, 0, sizeof event); 1985 switch (iw_event->event) { 1986 case IW_CM_EVENT_CLOSE: 1987 event.event = RDMA_CM_EVENT_DISCONNECTED; 1988 break; 1989 case IW_CM_EVENT_CONNECT_REPLY: 1990 memcpy(cma_src_addr(id_priv), laddr, 1991 rdma_addr_size(laddr)); 1992 memcpy(cma_dst_addr(id_priv), raddr, 1993 rdma_addr_size(raddr)); 1994 switch (iw_event->status) { 1995 case 0: 1996 event.event = RDMA_CM_EVENT_ESTABLISHED; 1997 event.param.conn.initiator_depth = iw_event->ird; 1998 event.param.conn.responder_resources = iw_event->ord; 1999 break; 2000 case -ECONNRESET: 2001 case -ECONNREFUSED: 2002 event.event = RDMA_CM_EVENT_REJECTED; 2003 break; 2004 case -ETIMEDOUT: 2005 event.event = RDMA_CM_EVENT_UNREACHABLE; 2006 break; 2007 default: 2008 event.event = RDMA_CM_EVENT_CONNECT_ERROR; 2009 break; 2010 } 2011 break; 2012 case IW_CM_EVENT_ESTABLISHED: 2013 event.event = RDMA_CM_EVENT_ESTABLISHED; 2014 event.param.conn.initiator_depth = iw_event->ird; 2015 event.param.conn.responder_resources = iw_event->ord; 2016 break; 2017 default: 2018 BUG_ON(1); 2019 } 2020 2021 event.status = iw_event->status; 2022 event.param.conn.private_data = iw_event->private_data; 2023 event.param.conn.private_data_len = iw_event->private_data_len; 2024 ret = id_priv->id.event_handler(&id_priv->id, &event); 2025 if (ret) { 2026 /* Destroy the CM ID by returning a non-zero value. */ 2027 id_priv->cm_id.iw = NULL; 2028 cma_exch(id_priv, RDMA_CM_DESTROYING); 2029 mutex_unlock(&id_priv->handler_mutex); 2030 rdma_destroy_id(&id_priv->id); 2031 return ret; 2032 } 2033 2034 out: 2035 mutex_unlock(&id_priv->handler_mutex); 2036 return ret; 2037 } 2038 2039 static int iw_conn_req_handler(struct iw_cm_id *cm_id, 2040 struct iw_cm_event *iw_event) 2041 { 2042 struct rdma_cm_id *new_cm_id; 2043 struct rdma_id_private *listen_id, *conn_id; 2044 struct rdma_cm_event event; 2045 int ret = -ECONNABORTED; 2046 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr; 2047 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr; 2048 2049 listen_id = cm_id->context; 2050 2051 mutex_lock(&listen_id->handler_mutex); 2052 if (listen_id->state != RDMA_CM_LISTEN) 2053 goto out; 2054 2055 /* Create a new RDMA id for the new IW CM ID */ 2056 new_cm_id = rdma_create_id(listen_id->id.route.addr.dev_addr.net, 2057 listen_id->id.event_handler, 2058 listen_id->id.context, 2059 RDMA_PS_TCP, IB_QPT_RC); 2060 if (IS_ERR(new_cm_id)) { 2061 ret = -ENOMEM; 2062 goto out; 2063 } 2064 conn_id = container_of(new_cm_id, struct rdma_id_private, id); 2065 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING); 2066 conn_id->state = RDMA_CM_CONNECT; 2067 2068 ret = rdma_translate_ip(laddr, &conn_id->id.route.addr.dev_addr, NULL); 2069 if (ret) { 2070 mutex_unlock(&conn_id->handler_mutex); 2071 rdma_destroy_id(new_cm_id); 2072 goto out; 2073 } 2074 2075 ret = cma_acquire_dev(conn_id, listen_id); 2076 if (ret) { 2077 mutex_unlock(&conn_id->handler_mutex); 2078 rdma_destroy_id(new_cm_id); 2079 goto out; 2080 } 2081 2082 conn_id->cm_id.iw = cm_id; 2083 cm_id->context = conn_id; 2084 cm_id->cm_handler = cma_iw_handler; 2085 2086 memcpy(cma_src_addr(conn_id), laddr, rdma_addr_size(laddr)); 2087 memcpy(cma_dst_addr(conn_id), raddr, rdma_addr_size(raddr)); 2088 2089 memset(&event, 0, sizeof event); 2090 event.event = RDMA_CM_EVENT_CONNECT_REQUEST; 2091 event.param.conn.private_data = iw_event->private_data; 2092 event.param.conn.private_data_len = iw_event->private_data_len; 2093 event.param.conn.initiator_depth = iw_event->ird; 2094 event.param.conn.responder_resources = iw_event->ord; 2095 2096 /* 2097 * Protect against the user destroying conn_id from another thread 2098 * until we're done accessing it. 2099 */ 2100 atomic_inc(&conn_id->refcount); 2101 ret = conn_id->id.event_handler(&conn_id->id, &event); 2102 if (ret) { 2103 /* User wants to destroy the CM ID */ 2104 conn_id->cm_id.iw = NULL; 2105 cma_exch(conn_id, RDMA_CM_DESTROYING); 2106 mutex_unlock(&conn_id->handler_mutex); 2107 cma_deref_id(conn_id); 2108 rdma_destroy_id(&conn_id->id); 2109 goto out; 2110 } 2111 2112 mutex_unlock(&conn_id->handler_mutex); 2113 cma_deref_id(conn_id); 2114 2115 out: 2116 mutex_unlock(&listen_id->handler_mutex); 2117 return ret; 2118 } 2119 2120 static int cma_ib_listen(struct rdma_id_private *id_priv) 2121 { 2122 struct sockaddr *addr; 2123 struct ib_cm_id *id; 2124 __be64 svc_id; 2125 2126 addr = cma_src_addr(id_priv); 2127 svc_id = rdma_get_service_id(&id_priv->id, addr); 2128 id = ib_cm_insert_listen(id_priv->id.device, cma_req_handler, svc_id); 2129 if (IS_ERR(id)) 2130 return PTR_ERR(id); 2131 id_priv->cm_id.ib = id; 2132 2133 return 0; 2134 } 2135 2136 static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog) 2137 { 2138 int ret; 2139 struct iw_cm_id *id; 2140 2141 id = iw_create_cm_id(id_priv->id.device, 2142 iw_conn_req_handler, 2143 id_priv); 2144 if (IS_ERR(id)) 2145 return PTR_ERR(id); 2146 2147 id->tos = id_priv->tos; 2148 id_priv->cm_id.iw = id; 2149 2150 memcpy(&id_priv->cm_id.iw->local_addr, cma_src_addr(id_priv), 2151 rdma_addr_size(cma_src_addr(id_priv))); 2152 2153 ret = iw_cm_listen(id_priv->cm_id.iw, backlog); 2154 2155 if (ret) { 2156 iw_destroy_cm_id(id_priv->cm_id.iw); 2157 id_priv->cm_id.iw = NULL; 2158 } 2159 2160 return ret; 2161 } 2162 2163 static int cma_listen_handler(struct rdma_cm_id *id, 2164 struct rdma_cm_event *event) 2165 { 2166 struct rdma_id_private *id_priv = id->context; 2167 2168 id->context = id_priv->id.context; 2169 id->event_handler = id_priv->id.event_handler; 2170 return id_priv->id.event_handler(id, event); 2171 } 2172 2173 static void cma_listen_on_dev(struct rdma_id_private *id_priv, 2174 struct cma_device *cma_dev) 2175 { 2176 struct rdma_id_private *dev_id_priv; 2177 struct rdma_cm_id *id; 2178 struct net *net = id_priv->id.route.addr.dev_addr.net; 2179 int ret; 2180 2181 if (cma_family(id_priv) == AF_IB && !rdma_cap_ib_cm(cma_dev->device, 1)) 2182 return; 2183 2184 id = rdma_create_id(net, cma_listen_handler, id_priv, id_priv->id.ps, 2185 id_priv->id.qp_type); 2186 if (IS_ERR(id)) 2187 return; 2188 2189 dev_id_priv = container_of(id, struct rdma_id_private, id); 2190 2191 dev_id_priv->state = RDMA_CM_ADDR_BOUND; 2192 memcpy(cma_src_addr(dev_id_priv), cma_src_addr(id_priv), 2193 rdma_addr_size(cma_src_addr(id_priv))); 2194 2195 _cma_attach_to_dev(dev_id_priv, cma_dev); 2196 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list); 2197 atomic_inc(&id_priv->refcount); 2198 dev_id_priv->internal_id = 1; 2199 dev_id_priv->afonly = id_priv->afonly; 2200 2201 ret = rdma_listen(id, id_priv->backlog); 2202 if (ret) 2203 pr_warn("RDMA CMA: cma_listen_on_dev, error %d, listening on device %s\n", 2204 ret, cma_dev->device->name); 2205 } 2206 2207 static void cma_listen_on_all(struct rdma_id_private *id_priv) 2208 { 2209 struct cma_device *cma_dev; 2210 2211 mutex_lock(&lock); 2212 list_add_tail(&id_priv->list, &listen_any_list); 2213 list_for_each_entry(cma_dev, &dev_list, list) 2214 cma_listen_on_dev(id_priv, cma_dev); 2215 mutex_unlock(&lock); 2216 } 2217 2218 void rdma_set_service_type(struct rdma_cm_id *id, int tos) 2219 { 2220 struct rdma_id_private *id_priv; 2221 2222 id_priv = container_of(id, struct rdma_id_private, id); 2223 id_priv->tos = (u8) tos; 2224 } 2225 EXPORT_SYMBOL(rdma_set_service_type); 2226 2227 static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec, 2228 void *context) 2229 { 2230 struct cma_work *work = context; 2231 struct rdma_route *route; 2232 2233 route = &work->id->id.route; 2234 2235 if (!status) { 2236 route->num_paths = 1; 2237 *route->path_rec = *path_rec; 2238 } else { 2239 work->old_state = RDMA_CM_ROUTE_QUERY; 2240 work->new_state = RDMA_CM_ADDR_RESOLVED; 2241 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR; 2242 work->event.status = status; 2243 } 2244 2245 queue_work(cma_wq, &work->work); 2246 } 2247 2248 static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms, 2249 struct cma_work *work) 2250 { 2251 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 2252 struct ib_sa_path_rec path_rec; 2253 ib_sa_comp_mask comp_mask; 2254 struct sockaddr_in6 *sin6; 2255 struct sockaddr_ib *sib; 2256 2257 memset(&path_rec, 0, sizeof path_rec); 2258 rdma_addr_get_sgid(dev_addr, &path_rec.sgid); 2259 rdma_addr_get_dgid(dev_addr, &path_rec.dgid); 2260 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); 2261 path_rec.numb_path = 1; 2262 path_rec.reversible = 1; 2263 path_rec.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv)); 2264 2265 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID | 2266 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH | 2267 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID; 2268 2269 switch (cma_family(id_priv)) { 2270 case AF_INET: 2271 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos); 2272 comp_mask |= IB_SA_PATH_REC_QOS_CLASS; 2273 break; 2274 case AF_INET6: 2275 sin6 = (struct sockaddr_in6 *) cma_src_addr(id_priv); 2276 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20); 2277 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS; 2278 break; 2279 case AF_IB: 2280 sib = (struct sockaddr_ib *) cma_src_addr(id_priv); 2281 path_rec.traffic_class = (u8) (be32_to_cpu(sib->sib_flowinfo) >> 20); 2282 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS; 2283 break; 2284 } 2285 2286 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device, 2287 id_priv->id.port_num, &path_rec, 2288 comp_mask, timeout_ms, 2289 GFP_KERNEL, cma_query_handler, 2290 work, &id_priv->query); 2291 2292 return (id_priv->query_id < 0) ? id_priv->query_id : 0; 2293 } 2294 2295 static void cma_work_handler(struct work_struct *_work) 2296 { 2297 struct cma_work *work = container_of(_work, struct cma_work, work); 2298 struct rdma_id_private *id_priv = work->id; 2299 int destroy = 0; 2300 2301 mutex_lock(&id_priv->handler_mutex); 2302 if (!cma_comp_exch(id_priv, work->old_state, work->new_state)) 2303 goto out; 2304 2305 if (id_priv->id.event_handler(&id_priv->id, &work->event)) { 2306 cma_exch(id_priv, RDMA_CM_DESTROYING); 2307 destroy = 1; 2308 } 2309 out: 2310 mutex_unlock(&id_priv->handler_mutex); 2311 cma_deref_id(id_priv); 2312 if (destroy) 2313 rdma_destroy_id(&id_priv->id); 2314 kfree(work); 2315 } 2316 2317 static void cma_ndev_work_handler(struct work_struct *_work) 2318 { 2319 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work); 2320 struct rdma_id_private *id_priv = work->id; 2321 int destroy = 0; 2322 2323 mutex_lock(&id_priv->handler_mutex); 2324 if (id_priv->state == RDMA_CM_DESTROYING || 2325 id_priv->state == RDMA_CM_DEVICE_REMOVAL) 2326 goto out; 2327 2328 if (id_priv->id.event_handler(&id_priv->id, &work->event)) { 2329 cma_exch(id_priv, RDMA_CM_DESTROYING); 2330 destroy = 1; 2331 } 2332 2333 out: 2334 mutex_unlock(&id_priv->handler_mutex); 2335 cma_deref_id(id_priv); 2336 if (destroy) 2337 rdma_destroy_id(&id_priv->id); 2338 kfree(work); 2339 } 2340 2341 static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms) 2342 { 2343 struct rdma_route *route = &id_priv->id.route; 2344 struct cma_work *work; 2345 int ret; 2346 2347 work = kzalloc(sizeof *work, GFP_KERNEL); 2348 if (!work) 2349 return -ENOMEM; 2350 2351 work->id = id_priv; 2352 INIT_WORK(&work->work, cma_work_handler); 2353 work->old_state = RDMA_CM_ROUTE_QUERY; 2354 work->new_state = RDMA_CM_ROUTE_RESOLVED; 2355 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 2356 2357 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL); 2358 if (!route->path_rec) { 2359 ret = -ENOMEM; 2360 goto err1; 2361 } 2362 2363 ret = cma_query_ib_route(id_priv, timeout_ms, work); 2364 if (ret) 2365 goto err2; 2366 2367 return 0; 2368 err2: 2369 kfree(route->path_rec); 2370 route->path_rec = NULL; 2371 err1: 2372 kfree(work); 2373 return ret; 2374 } 2375 2376 int rdma_set_ib_paths(struct rdma_cm_id *id, 2377 struct ib_sa_path_rec *path_rec, int num_paths) 2378 { 2379 struct rdma_id_private *id_priv; 2380 int ret; 2381 2382 id_priv = container_of(id, struct rdma_id_private, id); 2383 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, 2384 RDMA_CM_ROUTE_RESOLVED)) 2385 return -EINVAL; 2386 2387 id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths, 2388 GFP_KERNEL); 2389 if (!id->route.path_rec) { 2390 ret = -ENOMEM; 2391 goto err; 2392 } 2393 2394 id->route.num_paths = num_paths; 2395 return 0; 2396 err: 2397 cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED); 2398 return ret; 2399 } 2400 EXPORT_SYMBOL(rdma_set_ib_paths); 2401 2402 static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms) 2403 { 2404 struct cma_work *work; 2405 2406 work = kzalloc(sizeof *work, GFP_KERNEL); 2407 if (!work) 2408 return -ENOMEM; 2409 2410 work->id = id_priv; 2411 INIT_WORK(&work->work, cma_work_handler); 2412 work->old_state = RDMA_CM_ROUTE_QUERY; 2413 work->new_state = RDMA_CM_ROUTE_RESOLVED; 2414 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 2415 queue_work(cma_wq, &work->work); 2416 return 0; 2417 } 2418 2419 static int iboe_tos_to_sl(struct net_device *ndev, int tos) 2420 { 2421 int prio; 2422 struct net_device *dev; 2423 2424 prio = rt_tos2priority(tos); 2425 dev = ndev->priv_flags & IFF_802_1Q_VLAN ? 2426 vlan_dev_real_dev(ndev) : ndev; 2427 2428 if (dev->num_tc) 2429 return netdev_get_prio_tc_map(dev, prio); 2430 2431 #if IS_ENABLED(CONFIG_VLAN_8021Q) 2432 if (ndev->priv_flags & IFF_802_1Q_VLAN) 2433 return (vlan_dev_get_egress_qos_mask(ndev, prio) & 2434 VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT; 2435 #endif 2436 return 0; 2437 } 2438 2439 static int cma_resolve_iboe_route(struct rdma_id_private *id_priv) 2440 { 2441 struct rdma_route *route = &id_priv->id.route; 2442 struct rdma_addr *addr = &route->addr; 2443 struct cma_work *work; 2444 int ret; 2445 struct net_device *ndev = NULL; 2446 2447 2448 work = kzalloc(sizeof *work, GFP_KERNEL); 2449 if (!work) 2450 return -ENOMEM; 2451 2452 work->id = id_priv; 2453 INIT_WORK(&work->work, cma_work_handler); 2454 2455 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL); 2456 if (!route->path_rec) { 2457 ret = -ENOMEM; 2458 goto err1; 2459 } 2460 2461 route->num_paths = 1; 2462 2463 if (addr->dev_addr.bound_dev_if) { 2464 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if); 2465 if (!ndev) 2466 return -ENODEV; 2467 2468 if (ndev->flags & IFF_LOOPBACK) { 2469 dev_put(ndev); 2470 if (!id_priv->id.device->get_netdev) 2471 return -EOPNOTSUPP; 2472 2473 ndev = id_priv->id.device->get_netdev(id_priv->id.device, 2474 id_priv->id.port_num); 2475 if (!ndev) 2476 return -ENODEV; 2477 } 2478 2479 route->path_rec->net = &init_net; 2480 route->path_rec->ifindex = ndev->ifindex; 2481 route->path_rec->gid_type = id_priv->gid_type; 2482 } 2483 if (!ndev) { 2484 ret = -ENODEV; 2485 goto err2; 2486 } 2487 2488 memcpy(route->path_rec->dmac, addr->dev_addr.dst_dev_addr, ETH_ALEN); 2489 2490 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr, 2491 &route->path_rec->sgid); 2492 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.dst_addr, 2493 &route->path_rec->dgid); 2494 2495 /* Use the hint from IP Stack to select GID Type */ 2496 if (route->path_rec->gid_type < ib_network_to_gid_type(addr->dev_addr.network)) 2497 route->path_rec->gid_type = ib_network_to_gid_type(addr->dev_addr.network); 2498 if (((struct sockaddr *)&id_priv->id.route.addr.dst_addr)->sa_family != AF_IB) 2499 /* TODO: get the hoplimit from the inet/inet6 device */ 2500 route->path_rec->hop_limit = addr->dev_addr.hoplimit; 2501 else 2502 route->path_rec->hop_limit = 1; 2503 route->path_rec->reversible = 1; 2504 route->path_rec->pkey = cpu_to_be16(0xffff); 2505 route->path_rec->mtu_selector = IB_SA_EQ; 2506 route->path_rec->sl = iboe_tos_to_sl(ndev, id_priv->tos); 2507 route->path_rec->mtu = iboe_get_mtu(ndev->mtu); 2508 route->path_rec->rate_selector = IB_SA_EQ; 2509 route->path_rec->rate = iboe_get_rate(ndev); 2510 dev_put(ndev); 2511 route->path_rec->packet_life_time_selector = IB_SA_EQ; 2512 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME; 2513 if (!route->path_rec->mtu) { 2514 ret = -EINVAL; 2515 goto err2; 2516 } 2517 2518 work->old_state = RDMA_CM_ROUTE_QUERY; 2519 work->new_state = RDMA_CM_ROUTE_RESOLVED; 2520 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 2521 work->event.status = 0; 2522 2523 queue_work(cma_wq, &work->work); 2524 2525 return 0; 2526 2527 err2: 2528 kfree(route->path_rec); 2529 route->path_rec = NULL; 2530 err1: 2531 kfree(work); 2532 return ret; 2533 } 2534 2535 int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms) 2536 { 2537 struct rdma_id_private *id_priv; 2538 int ret; 2539 2540 id_priv = container_of(id, struct rdma_id_private, id); 2541 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY)) 2542 return -EINVAL; 2543 2544 atomic_inc(&id_priv->refcount); 2545 if (rdma_cap_ib_sa(id->device, id->port_num)) 2546 ret = cma_resolve_ib_route(id_priv, timeout_ms); 2547 else if (rdma_protocol_roce(id->device, id->port_num)) 2548 ret = cma_resolve_iboe_route(id_priv); 2549 else if (rdma_protocol_iwarp(id->device, id->port_num)) 2550 ret = cma_resolve_iw_route(id_priv, timeout_ms); 2551 else 2552 ret = -ENOSYS; 2553 2554 if (ret) 2555 goto err; 2556 2557 return 0; 2558 err: 2559 cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED); 2560 cma_deref_id(id_priv); 2561 return ret; 2562 } 2563 EXPORT_SYMBOL(rdma_resolve_route); 2564 2565 static void cma_set_loopback(struct sockaddr *addr) 2566 { 2567 switch (addr->sa_family) { 2568 case AF_INET: 2569 ((struct sockaddr_in *) addr)->sin_addr.s_addr = htonl(INADDR_LOOPBACK); 2570 break; 2571 case AF_INET6: 2572 ipv6_addr_set(&((struct sockaddr_in6 *) addr)->sin6_addr, 2573 0, 0, 0, htonl(1)); 2574 break; 2575 default: 2576 ib_addr_set(&((struct sockaddr_ib *) addr)->sib_addr, 2577 0, 0, 0, htonl(1)); 2578 break; 2579 } 2580 } 2581 2582 static int cma_bind_loopback(struct rdma_id_private *id_priv) 2583 { 2584 struct cma_device *cma_dev, *cur_dev; 2585 struct ib_port_attr port_attr; 2586 union ib_gid gid; 2587 u16 pkey; 2588 int ret; 2589 u8 p; 2590 2591 cma_dev = NULL; 2592 mutex_lock(&lock); 2593 list_for_each_entry(cur_dev, &dev_list, list) { 2594 if (cma_family(id_priv) == AF_IB && 2595 !rdma_cap_ib_cm(cur_dev->device, 1)) 2596 continue; 2597 2598 if (!cma_dev) 2599 cma_dev = cur_dev; 2600 2601 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) { 2602 if (!ib_query_port(cur_dev->device, p, &port_attr) && 2603 port_attr.state == IB_PORT_ACTIVE) { 2604 cma_dev = cur_dev; 2605 goto port_found; 2606 } 2607 } 2608 } 2609 2610 if (!cma_dev) { 2611 ret = -ENODEV; 2612 goto out; 2613 } 2614 2615 p = 1; 2616 2617 port_found: 2618 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid, NULL); 2619 if (ret) 2620 goto out; 2621 2622 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey); 2623 if (ret) 2624 goto out; 2625 2626 id_priv->id.route.addr.dev_addr.dev_type = 2627 (rdma_protocol_ib(cma_dev->device, p)) ? 2628 ARPHRD_INFINIBAND : ARPHRD_ETHER; 2629 2630 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid); 2631 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey); 2632 id_priv->id.port_num = p; 2633 cma_attach_to_dev(id_priv, cma_dev); 2634 cma_set_loopback(cma_src_addr(id_priv)); 2635 out: 2636 mutex_unlock(&lock); 2637 return ret; 2638 } 2639 2640 static void addr_handler(int status, struct sockaddr *src_addr, 2641 struct rdma_dev_addr *dev_addr, void *context) 2642 { 2643 struct rdma_id_private *id_priv = context; 2644 struct rdma_cm_event event; 2645 2646 memset(&event, 0, sizeof event); 2647 mutex_lock(&id_priv->handler_mutex); 2648 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, 2649 RDMA_CM_ADDR_RESOLVED)) 2650 goto out; 2651 2652 memcpy(cma_src_addr(id_priv), src_addr, rdma_addr_size(src_addr)); 2653 if (!status && !id_priv->cma_dev) 2654 status = cma_acquire_dev(id_priv, NULL); 2655 2656 if (status) { 2657 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, 2658 RDMA_CM_ADDR_BOUND)) 2659 goto out; 2660 event.event = RDMA_CM_EVENT_ADDR_ERROR; 2661 event.status = status; 2662 } else 2663 event.event = RDMA_CM_EVENT_ADDR_RESOLVED; 2664 2665 if (id_priv->id.event_handler(&id_priv->id, &event)) { 2666 cma_exch(id_priv, RDMA_CM_DESTROYING); 2667 mutex_unlock(&id_priv->handler_mutex); 2668 cma_deref_id(id_priv); 2669 rdma_destroy_id(&id_priv->id); 2670 return; 2671 } 2672 out: 2673 mutex_unlock(&id_priv->handler_mutex); 2674 cma_deref_id(id_priv); 2675 } 2676 2677 static int cma_resolve_loopback(struct rdma_id_private *id_priv) 2678 { 2679 struct cma_work *work; 2680 union ib_gid gid; 2681 int ret; 2682 2683 work = kzalloc(sizeof *work, GFP_KERNEL); 2684 if (!work) 2685 return -ENOMEM; 2686 2687 if (!id_priv->cma_dev) { 2688 ret = cma_bind_loopback(id_priv); 2689 if (ret) 2690 goto err; 2691 } 2692 2693 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid); 2694 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid); 2695 2696 work->id = id_priv; 2697 INIT_WORK(&work->work, cma_work_handler); 2698 work->old_state = RDMA_CM_ADDR_QUERY; 2699 work->new_state = RDMA_CM_ADDR_RESOLVED; 2700 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED; 2701 queue_work(cma_wq, &work->work); 2702 return 0; 2703 err: 2704 kfree(work); 2705 return ret; 2706 } 2707 2708 static int cma_resolve_ib_addr(struct rdma_id_private *id_priv) 2709 { 2710 struct cma_work *work; 2711 int ret; 2712 2713 work = kzalloc(sizeof *work, GFP_KERNEL); 2714 if (!work) 2715 return -ENOMEM; 2716 2717 if (!id_priv->cma_dev) { 2718 ret = cma_resolve_ib_dev(id_priv); 2719 if (ret) 2720 goto err; 2721 } 2722 2723 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, (union ib_gid *) 2724 &(((struct sockaddr_ib *) &id_priv->id.route.addr.dst_addr)->sib_addr)); 2725 2726 work->id = id_priv; 2727 INIT_WORK(&work->work, cma_work_handler); 2728 work->old_state = RDMA_CM_ADDR_QUERY; 2729 work->new_state = RDMA_CM_ADDR_RESOLVED; 2730 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED; 2731 queue_work(cma_wq, &work->work); 2732 return 0; 2733 err: 2734 kfree(work); 2735 return ret; 2736 } 2737 2738 static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, 2739 struct sockaddr *dst_addr) 2740 { 2741 if (!src_addr || !src_addr->sa_family) { 2742 src_addr = (struct sockaddr *) &id->route.addr.src_addr; 2743 src_addr->sa_family = dst_addr->sa_family; 2744 if (dst_addr->sa_family == AF_INET6) { 2745 struct sockaddr_in6 *src_addr6 = (struct sockaddr_in6 *) src_addr; 2746 struct sockaddr_in6 *dst_addr6 = (struct sockaddr_in6 *) dst_addr; 2747 src_addr6->sin6_scope_id = dst_addr6->sin6_scope_id; 2748 if (ipv6_addr_type(&dst_addr6->sin6_addr) & IPV6_ADDR_LINKLOCAL) 2749 id->route.addr.dev_addr.bound_dev_if = dst_addr6->sin6_scope_id; 2750 } else if (dst_addr->sa_family == AF_IB) { 2751 ((struct sockaddr_ib *) src_addr)->sib_pkey = 2752 ((struct sockaddr_ib *) dst_addr)->sib_pkey; 2753 } 2754 } 2755 return rdma_bind_addr(id, src_addr); 2756 } 2757 2758 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, 2759 struct sockaddr *dst_addr, int timeout_ms) 2760 { 2761 struct rdma_id_private *id_priv; 2762 int ret; 2763 2764 id_priv = container_of(id, struct rdma_id_private, id); 2765 if (id_priv->state == RDMA_CM_IDLE) { 2766 ret = cma_bind_addr(id, src_addr, dst_addr); 2767 if (ret) 2768 return ret; 2769 } 2770 2771 if (cma_family(id_priv) != dst_addr->sa_family) 2772 return -EINVAL; 2773 2774 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY)) 2775 return -EINVAL; 2776 2777 atomic_inc(&id_priv->refcount); 2778 memcpy(cma_dst_addr(id_priv), dst_addr, rdma_addr_size(dst_addr)); 2779 if (cma_any_addr(dst_addr)) { 2780 ret = cma_resolve_loopback(id_priv); 2781 } else { 2782 if (dst_addr->sa_family == AF_IB) { 2783 ret = cma_resolve_ib_addr(id_priv); 2784 } else { 2785 ret = rdma_resolve_ip(&addr_client, cma_src_addr(id_priv), 2786 dst_addr, &id->route.addr.dev_addr, 2787 timeout_ms, addr_handler, id_priv); 2788 } 2789 } 2790 if (ret) 2791 goto err; 2792 2793 return 0; 2794 err: 2795 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND); 2796 cma_deref_id(id_priv); 2797 return ret; 2798 } 2799 EXPORT_SYMBOL(rdma_resolve_addr); 2800 2801 int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse) 2802 { 2803 struct rdma_id_private *id_priv; 2804 unsigned long flags; 2805 int ret; 2806 2807 id_priv = container_of(id, struct rdma_id_private, id); 2808 spin_lock_irqsave(&id_priv->lock, flags); 2809 if (reuse || id_priv->state == RDMA_CM_IDLE) { 2810 id_priv->reuseaddr = reuse; 2811 ret = 0; 2812 } else { 2813 ret = -EINVAL; 2814 } 2815 spin_unlock_irqrestore(&id_priv->lock, flags); 2816 return ret; 2817 } 2818 EXPORT_SYMBOL(rdma_set_reuseaddr); 2819 2820 int rdma_set_afonly(struct rdma_cm_id *id, int afonly) 2821 { 2822 struct rdma_id_private *id_priv; 2823 unsigned long flags; 2824 int ret; 2825 2826 id_priv = container_of(id, struct rdma_id_private, id); 2827 spin_lock_irqsave(&id_priv->lock, flags); 2828 if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) { 2829 id_priv->options |= (1 << CMA_OPTION_AFONLY); 2830 id_priv->afonly = afonly; 2831 ret = 0; 2832 } else { 2833 ret = -EINVAL; 2834 } 2835 spin_unlock_irqrestore(&id_priv->lock, flags); 2836 return ret; 2837 } 2838 EXPORT_SYMBOL(rdma_set_afonly); 2839 2840 static void cma_bind_port(struct rdma_bind_list *bind_list, 2841 struct rdma_id_private *id_priv) 2842 { 2843 struct sockaddr *addr; 2844 struct sockaddr_ib *sib; 2845 u64 sid, mask; 2846 __be16 port; 2847 2848 addr = cma_src_addr(id_priv); 2849 port = htons(bind_list->port); 2850 2851 switch (addr->sa_family) { 2852 case AF_INET: 2853 ((struct sockaddr_in *) addr)->sin_port = port; 2854 break; 2855 case AF_INET6: 2856 ((struct sockaddr_in6 *) addr)->sin6_port = port; 2857 break; 2858 case AF_IB: 2859 sib = (struct sockaddr_ib *) addr; 2860 sid = be64_to_cpu(sib->sib_sid); 2861 mask = be64_to_cpu(sib->sib_sid_mask); 2862 sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port)); 2863 sib->sib_sid_mask = cpu_to_be64(~0ULL); 2864 break; 2865 } 2866 id_priv->bind_list = bind_list; 2867 hlist_add_head(&id_priv->node, &bind_list->owners); 2868 } 2869 2870 static int cma_alloc_port(enum rdma_port_space ps, 2871 struct rdma_id_private *id_priv, unsigned short snum) 2872 { 2873 struct rdma_bind_list *bind_list; 2874 int ret; 2875 2876 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL); 2877 if (!bind_list) 2878 return -ENOMEM; 2879 2880 ret = cma_ps_alloc(id_priv->id.route.addr.dev_addr.net, ps, bind_list, 2881 snum); 2882 if (ret < 0) 2883 goto err; 2884 2885 bind_list->ps = ps; 2886 bind_list->port = (unsigned short)ret; 2887 cma_bind_port(bind_list, id_priv); 2888 return 0; 2889 err: 2890 kfree(bind_list); 2891 return ret == -ENOSPC ? -EADDRNOTAVAIL : ret; 2892 } 2893 2894 static int cma_alloc_any_port(enum rdma_port_space ps, 2895 struct rdma_id_private *id_priv) 2896 { 2897 static unsigned int last_used_port; 2898 int low, high, remaining; 2899 unsigned int rover; 2900 struct net *net = id_priv->id.route.addr.dev_addr.net; 2901 2902 inet_get_local_port_range(net, &low, &high); 2903 remaining = (high - low) + 1; 2904 rover = prandom_u32() % remaining + low; 2905 retry: 2906 if (last_used_port != rover && 2907 !cma_ps_find(net, ps, (unsigned short)rover)) { 2908 int ret = cma_alloc_port(ps, id_priv, rover); 2909 /* 2910 * Remember previously used port number in order to avoid 2911 * re-using same port immediately after it is closed. 2912 */ 2913 if (!ret) 2914 last_used_port = rover; 2915 if (ret != -EADDRNOTAVAIL) 2916 return ret; 2917 } 2918 if (--remaining) { 2919 rover++; 2920 if ((rover < low) || (rover > high)) 2921 rover = low; 2922 goto retry; 2923 } 2924 return -EADDRNOTAVAIL; 2925 } 2926 2927 /* 2928 * Check that the requested port is available. This is called when trying to 2929 * bind to a specific port, or when trying to listen on a bound port. In 2930 * the latter case, the provided id_priv may already be on the bind_list, but 2931 * we still need to check that it's okay to start listening. 2932 */ 2933 static int cma_check_port(struct rdma_bind_list *bind_list, 2934 struct rdma_id_private *id_priv, uint8_t reuseaddr) 2935 { 2936 struct rdma_id_private *cur_id; 2937 struct sockaddr *addr, *cur_addr; 2938 2939 addr = cma_src_addr(id_priv); 2940 hlist_for_each_entry(cur_id, &bind_list->owners, node) { 2941 if (id_priv == cur_id) 2942 continue; 2943 2944 if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr && 2945 cur_id->reuseaddr) 2946 continue; 2947 2948 cur_addr = cma_src_addr(cur_id); 2949 if (id_priv->afonly && cur_id->afonly && 2950 (addr->sa_family != cur_addr->sa_family)) 2951 continue; 2952 2953 if (cma_any_addr(addr) || cma_any_addr(cur_addr)) 2954 return -EADDRNOTAVAIL; 2955 2956 if (!cma_addr_cmp(addr, cur_addr)) 2957 return -EADDRINUSE; 2958 } 2959 return 0; 2960 } 2961 2962 static int cma_use_port(enum rdma_port_space ps, 2963 struct rdma_id_private *id_priv) 2964 { 2965 struct rdma_bind_list *bind_list; 2966 unsigned short snum; 2967 int ret; 2968 2969 snum = ntohs(cma_port(cma_src_addr(id_priv))); 2970 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE)) 2971 return -EACCES; 2972 2973 bind_list = cma_ps_find(id_priv->id.route.addr.dev_addr.net, ps, snum); 2974 if (!bind_list) { 2975 ret = cma_alloc_port(ps, id_priv, snum); 2976 } else { 2977 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr); 2978 if (!ret) 2979 cma_bind_port(bind_list, id_priv); 2980 } 2981 return ret; 2982 } 2983 2984 static int cma_bind_listen(struct rdma_id_private *id_priv) 2985 { 2986 struct rdma_bind_list *bind_list = id_priv->bind_list; 2987 int ret = 0; 2988 2989 mutex_lock(&lock); 2990 if (bind_list->owners.first->next) 2991 ret = cma_check_port(bind_list, id_priv, 0); 2992 mutex_unlock(&lock); 2993 return ret; 2994 } 2995 2996 static enum rdma_port_space cma_select_inet_ps( 2997 struct rdma_id_private *id_priv) 2998 { 2999 switch (id_priv->id.ps) { 3000 case RDMA_PS_TCP: 3001 case RDMA_PS_UDP: 3002 case RDMA_PS_IPOIB: 3003 case RDMA_PS_IB: 3004 return id_priv->id.ps; 3005 default: 3006 3007 return 0; 3008 } 3009 } 3010 3011 static enum rdma_port_space cma_select_ib_ps(struct rdma_id_private *id_priv) 3012 { 3013 enum rdma_port_space ps = 0; 3014 struct sockaddr_ib *sib; 3015 u64 sid_ps, mask, sid; 3016 3017 sib = (struct sockaddr_ib *) cma_src_addr(id_priv); 3018 mask = be64_to_cpu(sib->sib_sid_mask) & RDMA_IB_IP_PS_MASK; 3019 sid = be64_to_cpu(sib->sib_sid) & mask; 3020 3021 if ((id_priv->id.ps == RDMA_PS_IB) && (sid == (RDMA_IB_IP_PS_IB & mask))) { 3022 sid_ps = RDMA_IB_IP_PS_IB; 3023 ps = RDMA_PS_IB; 3024 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_TCP)) && 3025 (sid == (RDMA_IB_IP_PS_TCP & mask))) { 3026 sid_ps = RDMA_IB_IP_PS_TCP; 3027 ps = RDMA_PS_TCP; 3028 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_UDP)) && 3029 (sid == (RDMA_IB_IP_PS_UDP & mask))) { 3030 sid_ps = RDMA_IB_IP_PS_UDP; 3031 ps = RDMA_PS_UDP; 3032 } 3033 3034 if (ps) { 3035 sib->sib_sid = cpu_to_be64(sid_ps | ntohs(cma_port((struct sockaddr *) sib))); 3036 sib->sib_sid_mask = cpu_to_be64(RDMA_IB_IP_PS_MASK | 3037 be64_to_cpu(sib->sib_sid_mask)); 3038 } 3039 return ps; 3040 } 3041 3042 static int cma_get_port(struct rdma_id_private *id_priv) 3043 { 3044 enum rdma_port_space ps; 3045 int ret; 3046 3047 if (cma_family(id_priv) != AF_IB) 3048 ps = cma_select_inet_ps(id_priv); 3049 else 3050 ps = cma_select_ib_ps(id_priv); 3051 if (!ps) 3052 return -EPROTONOSUPPORT; 3053 3054 mutex_lock(&lock); 3055 if (cma_any_port(cma_src_addr(id_priv))) 3056 ret = cma_alloc_any_port(ps, id_priv); 3057 else 3058 ret = cma_use_port(ps, id_priv); 3059 mutex_unlock(&lock); 3060 3061 return ret; 3062 } 3063 3064 static int cma_check_linklocal(struct rdma_dev_addr *dev_addr, 3065 struct sockaddr *addr) 3066 { 3067 #if IS_ENABLED(CONFIG_IPV6) 3068 struct sockaddr_in6 *sin6; 3069 3070 if (addr->sa_family != AF_INET6) 3071 return 0; 3072 3073 sin6 = (struct sockaddr_in6 *) addr; 3074 3075 if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)) 3076 return 0; 3077 3078 if (!sin6->sin6_scope_id) 3079 return -EINVAL; 3080 3081 dev_addr->bound_dev_if = sin6->sin6_scope_id; 3082 #endif 3083 return 0; 3084 } 3085 3086 int rdma_listen(struct rdma_cm_id *id, int backlog) 3087 { 3088 struct rdma_id_private *id_priv; 3089 int ret; 3090 3091 id_priv = container_of(id, struct rdma_id_private, id); 3092 if (id_priv->state == RDMA_CM_IDLE) { 3093 id->route.addr.src_addr.ss_family = AF_INET; 3094 ret = rdma_bind_addr(id, cma_src_addr(id_priv)); 3095 if (ret) 3096 return ret; 3097 } 3098 3099 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN)) 3100 return -EINVAL; 3101 3102 if (id_priv->reuseaddr) { 3103 ret = cma_bind_listen(id_priv); 3104 if (ret) 3105 goto err; 3106 } 3107 3108 id_priv->backlog = backlog; 3109 if (id->device) { 3110 if (rdma_cap_ib_cm(id->device, 1)) { 3111 ret = cma_ib_listen(id_priv); 3112 if (ret) 3113 goto err; 3114 } else if (rdma_cap_iw_cm(id->device, 1)) { 3115 ret = cma_iw_listen(id_priv, backlog); 3116 if (ret) 3117 goto err; 3118 } else { 3119 ret = -ENOSYS; 3120 goto err; 3121 } 3122 } else 3123 cma_listen_on_all(id_priv); 3124 3125 return 0; 3126 err: 3127 id_priv->backlog = 0; 3128 cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND); 3129 return ret; 3130 } 3131 EXPORT_SYMBOL(rdma_listen); 3132 3133 int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr) 3134 { 3135 struct rdma_id_private *id_priv; 3136 int ret; 3137 3138 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6 && 3139 addr->sa_family != AF_IB) 3140 return -EAFNOSUPPORT; 3141 3142 id_priv = container_of(id, struct rdma_id_private, id); 3143 if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND)) 3144 return -EINVAL; 3145 3146 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr); 3147 if (ret) 3148 goto err1; 3149 3150 memcpy(cma_src_addr(id_priv), addr, rdma_addr_size(addr)); 3151 if (!cma_any_addr(addr)) { 3152 ret = cma_translate_addr(addr, &id->route.addr.dev_addr); 3153 if (ret) 3154 goto err1; 3155 3156 ret = cma_acquire_dev(id_priv, NULL); 3157 if (ret) 3158 goto err1; 3159 } 3160 3161 if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) { 3162 if (addr->sa_family == AF_INET) 3163 id_priv->afonly = 1; 3164 #if IS_ENABLED(CONFIG_IPV6) 3165 else if (addr->sa_family == AF_INET6) { 3166 struct net *net = id_priv->id.route.addr.dev_addr.net; 3167 3168 id_priv->afonly = net->ipv6.sysctl.bindv6only; 3169 } 3170 #endif 3171 } 3172 ret = cma_get_port(id_priv); 3173 if (ret) 3174 goto err2; 3175 3176 return 0; 3177 err2: 3178 if (id_priv->cma_dev) 3179 cma_release_dev(id_priv); 3180 err1: 3181 cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE); 3182 return ret; 3183 } 3184 EXPORT_SYMBOL(rdma_bind_addr); 3185 3186 static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv) 3187 { 3188 struct cma_hdr *cma_hdr; 3189 3190 cma_hdr = hdr; 3191 cma_hdr->cma_version = CMA_VERSION; 3192 if (cma_family(id_priv) == AF_INET) { 3193 struct sockaddr_in *src4, *dst4; 3194 3195 src4 = (struct sockaddr_in *) cma_src_addr(id_priv); 3196 dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv); 3197 3198 cma_set_ip_ver(cma_hdr, 4); 3199 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; 3200 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; 3201 cma_hdr->port = src4->sin_port; 3202 } else if (cma_family(id_priv) == AF_INET6) { 3203 struct sockaddr_in6 *src6, *dst6; 3204 3205 src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv); 3206 dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv); 3207 3208 cma_set_ip_ver(cma_hdr, 6); 3209 cma_hdr->src_addr.ip6 = src6->sin6_addr; 3210 cma_hdr->dst_addr.ip6 = dst6->sin6_addr; 3211 cma_hdr->port = src6->sin6_port; 3212 } 3213 return 0; 3214 } 3215 3216 static int cma_sidr_rep_handler(struct ib_cm_id *cm_id, 3217 struct ib_cm_event *ib_event) 3218 { 3219 struct rdma_id_private *id_priv = cm_id->context; 3220 struct rdma_cm_event event; 3221 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd; 3222 int ret = 0; 3223 3224 mutex_lock(&id_priv->handler_mutex); 3225 if (id_priv->state != RDMA_CM_CONNECT) 3226 goto out; 3227 3228 memset(&event, 0, sizeof event); 3229 switch (ib_event->event) { 3230 case IB_CM_SIDR_REQ_ERROR: 3231 event.event = RDMA_CM_EVENT_UNREACHABLE; 3232 event.status = -ETIMEDOUT; 3233 break; 3234 case IB_CM_SIDR_REP_RECEIVED: 3235 event.param.ud.private_data = ib_event->private_data; 3236 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE; 3237 if (rep->status != IB_SIDR_SUCCESS) { 3238 event.event = RDMA_CM_EVENT_UNREACHABLE; 3239 event.status = ib_event->param.sidr_rep_rcvd.status; 3240 break; 3241 } 3242 ret = cma_set_qkey(id_priv, rep->qkey); 3243 if (ret) { 3244 event.event = RDMA_CM_EVENT_ADDR_ERROR; 3245 event.status = ret; 3246 break; 3247 } 3248 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num, 3249 id_priv->id.route.path_rec, 3250 &event.param.ud.ah_attr); 3251 event.param.ud.qp_num = rep->qpn; 3252 event.param.ud.qkey = rep->qkey; 3253 event.event = RDMA_CM_EVENT_ESTABLISHED; 3254 event.status = 0; 3255 break; 3256 default: 3257 pr_err("RDMA CMA: unexpected IB CM event: %d\n", 3258 ib_event->event); 3259 goto out; 3260 } 3261 3262 ret = id_priv->id.event_handler(&id_priv->id, &event); 3263 if (ret) { 3264 /* Destroy the CM ID by returning a non-zero value. */ 3265 id_priv->cm_id.ib = NULL; 3266 cma_exch(id_priv, RDMA_CM_DESTROYING); 3267 mutex_unlock(&id_priv->handler_mutex); 3268 rdma_destroy_id(&id_priv->id); 3269 return ret; 3270 } 3271 out: 3272 mutex_unlock(&id_priv->handler_mutex); 3273 return ret; 3274 } 3275 3276 static int cma_resolve_ib_udp(struct rdma_id_private *id_priv, 3277 struct rdma_conn_param *conn_param) 3278 { 3279 struct ib_cm_sidr_req_param req; 3280 struct ib_cm_id *id; 3281 void *private_data; 3282 int offset, ret; 3283 3284 memset(&req, 0, sizeof req); 3285 offset = cma_user_data_offset(id_priv); 3286 req.private_data_len = offset + conn_param->private_data_len; 3287 if (req.private_data_len < conn_param->private_data_len) 3288 return -EINVAL; 3289 3290 if (req.private_data_len) { 3291 private_data = kzalloc(req.private_data_len, GFP_ATOMIC); 3292 if (!private_data) 3293 return -ENOMEM; 3294 } else { 3295 private_data = NULL; 3296 } 3297 3298 if (conn_param->private_data && conn_param->private_data_len) 3299 memcpy(private_data + offset, conn_param->private_data, 3300 conn_param->private_data_len); 3301 3302 if (private_data) { 3303 ret = cma_format_hdr(private_data, id_priv); 3304 if (ret) 3305 goto out; 3306 req.private_data = private_data; 3307 } 3308 3309 id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler, 3310 id_priv); 3311 if (IS_ERR(id)) { 3312 ret = PTR_ERR(id); 3313 goto out; 3314 } 3315 id_priv->cm_id.ib = id; 3316 3317 req.path = id_priv->id.route.path_rec; 3318 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv)); 3319 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8); 3320 req.max_cm_retries = CMA_MAX_CM_RETRIES; 3321 3322 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req); 3323 if (ret) { 3324 ib_destroy_cm_id(id_priv->cm_id.ib); 3325 id_priv->cm_id.ib = NULL; 3326 } 3327 out: 3328 kfree(private_data); 3329 return ret; 3330 } 3331 3332 static int cma_connect_ib(struct rdma_id_private *id_priv, 3333 struct rdma_conn_param *conn_param) 3334 { 3335 struct ib_cm_req_param req; 3336 struct rdma_route *route; 3337 void *private_data; 3338 struct ib_cm_id *id; 3339 int offset, ret; 3340 3341 memset(&req, 0, sizeof req); 3342 offset = cma_user_data_offset(id_priv); 3343 req.private_data_len = offset + conn_param->private_data_len; 3344 if (req.private_data_len < conn_param->private_data_len) 3345 return -EINVAL; 3346 3347 if (req.private_data_len) { 3348 private_data = kzalloc(req.private_data_len, GFP_ATOMIC); 3349 if (!private_data) 3350 return -ENOMEM; 3351 } else { 3352 private_data = NULL; 3353 } 3354 3355 if (conn_param->private_data && conn_param->private_data_len) 3356 memcpy(private_data + offset, conn_param->private_data, 3357 conn_param->private_data_len); 3358 3359 id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv); 3360 if (IS_ERR(id)) { 3361 ret = PTR_ERR(id); 3362 goto out; 3363 } 3364 id_priv->cm_id.ib = id; 3365 3366 route = &id_priv->id.route; 3367 if (private_data) { 3368 ret = cma_format_hdr(private_data, id_priv); 3369 if (ret) 3370 goto out; 3371 req.private_data = private_data; 3372 } 3373 3374 req.primary_path = &route->path_rec[0]; 3375 if (route->num_paths == 2) 3376 req.alternate_path = &route->path_rec[1]; 3377 3378 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv)); 3379 req.qp_num = id_priv->qp_num; 3380 req.qp_type = id_priv->id.qp_type; 3381 req.starting_psn = id_priv->seq_num; 3382 req.responder_resources = conn_param->responder_resources; 3383 req.initiator_depth = conn_param->initiator_depth; 3384 req.flow_control = conn_param->flow_control; 3385 req.retry_count = min_t(u8, 7, conn_param->retry_count); 3386 req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count); 3387 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; 3388 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; 3389 req.max_cm_retries = CMA_MAX_CM_RETRIES; 3390 req.srq = id_priv->srq ? 1 : 0; 3391 3392 ret = ib_send_cm_req(id_priv->cm_id.ib, &req); 3393 out: 3394 if (ret && !IS_ERR(id)) { 3395 ib_destroy_cm_id(id); 3396 id_priv->cm_id.ib = NULL; 3397 } 3398 3399 kfree(private_data); 3400 return ret; 3401 } 3402 3403 static int cma_connect_iw(struct rdma_id_private *id_priv, 3404 struct rdma_conn_param *conn_param) 3405 { 3406 struct iw_cm_id *cm_id; 3407 int ret; 3408 struct iw_cm_conn_param iw_param; 3409 3410 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv); 3411 if (IS_ERR(cm_id)) 3412 return PTR_ERR(cm_id); 3413 3414 cm_id->tos = id_priv->tos; 3415 id_priv->cm_id.iw = cm_id; 3416 3417 memcpy(&cm_id->local_addr, cma_src_addr(id_priv), 3418 rdma_addr_size(cma_src_addr(id_priv))); 3419 memcpy(&cm_id->remote_addr, cma_dst_addr(id_priv), 3420 rdma_addr_size(cma_dst_addr(id_priv))); 3421 3422 ret = cma_modify_qp_rtr(id_priv, conn_param); 3423 if (ret) 3424 goto out; 3425 3426 if (conn_param) { 3427 iw_param.ord = conn_param->initiator_depth; 3428 iw_param.ird = conn_param->responder_resources; 3429 iw_param.private_data = conn_param->private_data; 3430 iw_param.private_data_len = conn_param->private_data_len; 3431 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num; 3432 } else { 3433 memset(&iw_param, 0, sizeof iw_param); 3434 iw_param.qpn = id_priv->qp_num; 3435 } 3436 ret = iw_cm_connect(cm_id, &iw_param); 3437 out: 3438 if (ret) { 3439 iw_destroy_cm_id(cm_id); 3440 id_priv->cm_id.iw = NULL; 3441 } 3442 return ret; 3443 } 3444 3445 int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) 3446 { 3447 struct rdma_id_private *id_priv; 3448 int ret; 3449 3450 id_priv = container_of(id, struct rdma_id_private, id); 3451 if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT)) 3452 return -EINVAL; 3453 3454 if (!id->qp) { 3455 id_priv->qp_num = conn_param->qp_num; 3456 id_priv->srq = conn_param->srq; 3457 } 3458 3459 if (rdma_cap_ib_cm(id->device, id->port_num)) { 3460 if (id->qp_type == IB_QPT_UD) 3461 ret = cma_resolve_ib_udp(id_priv, conn_param); 3462 else 3463 ret = cma_connect_ib(id_priv, conn_param); 3464 } else if (rdma_cap_iw_cm(id->device, id->port_num)) 3465 ret = cma_connect_iw(id_priv, conn_param); 3466 else 3467 ret = -ENOSYS; 3468 if (ret) 3469 goto err; 3470 3471 return 0; 3472 err: 3473 cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED); 3474 return ret; 3475 } 3476 EXPORT_SYMBOL(rdma_connect); 3477 3478 static int cma_accept_ib(struct rdma_id_private *id_priv, 3479 struct rdma_conn_param *conn_param) 3480 { 3481 struct ib_cm_rep_param rep; 3482 int ret; 3483 3484 ret = cma_modify_qp_rtr(id_priv, conn_param); 3485 if (ret) 3486 goto out; 3487 3488 ret = cma_modify_qp_rts(id_priv, conn_param); 3489 if (ret) 3490 goto out; 3491 3492 memset(&rep, 0, sizeof rep); 3493 rep.qp_num = id_priv->qp_num; 3494 rep.starting_psn = id_priv->seq_num; 3495 rep.private_data = conn_param->private_data; 3496 rep.private_data_len = conn_param->private_data_len; 3497 rep.responder_resources = conn_param->responder_resources; 3498 rep.initiator_depth = conn_param->initiator_depth; 3499 rep.failover_accepted = 0; 3500 rep.flow_control = conn_param->flow_control; 3501 rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count); 3502 rep.srq = id_priv->srq ? 1 : 0; 3503 3504 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep); 3505 out: 3506 return ret; 3507 } 3508 3509 static int cma_accept_iw(struct rdma_id_private *id_priv, 3510 struct rdma_conn_param *conn_param) 3511 { 3512 struct iw_cm_conn_param iw_param; 3513 int ret; 3514 3515 ret = cma_modify_qp_rtr(id_priv, conn_param); 3516 if (ret) 3517 return ret; 3518 3519 iw_param.ord = conn_param->initiator_depth; 3520 iw_param.ird = conn_param->responder_resources; 3521 iw_param.private_data = conn_param->private_data; 3522 iw_param.private_data_len = conn_param->private_data_len; 3523 if (id_priv->id.qp) { 3524 iw_param.qpn = id_priv->qp_num; 3525 } else 3526 iw_param.qpn = conn_param->qp_num; 3527 3528 return iw_cm_accept(id_priv->cm_id.iw, &iw_param); 3529 } 3530 3531 static int cma_send_sidr_rep(struct rdma_id_private *id_priv, 3532 enum ib_cm_sidr_status status, u32 qkey, 3533 const void *private_data, int private_data_len) 3534 { 3535 struct ib_cm_sidr_rep_param rep; 3536 int ret; 3537 3538 memset(&rep, 0, sizeof rep); 3539 rep.status = status; 3540 if (status == IB_SIDR_SUCCESS) { 3541 ret = cma_set_qkey(id_priv, qkey); 3542 if (ret) 3543 return ret; 3544 rep.qp_num = id_priv->qp_num; 3545 rep.qkey = id_priv->qkey; 3546 } 3547 rep.private_data = private_data; 3548 rep.private_data_len = private_data_len; 3549 3550 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep); 3551 } 3552 3553 int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) 3554 { 3555 struct rdma_id_private *id_priv; 3556 int ret; 3557 3558 id_priv = container_of(id, struct rdma_id_private, id); 3559 3560 id_priv->owner = task_pid_nr(current); 3561 3562 if (!cma_comp(id_priv, RDMA_CM_CONNECT)) 3563 return -EINVAL; 3564 3565 if (!id->qp && conn_param) { 3566 id_priv->qp_num = conn_param->qp_num; 3567 id_priv->srq = conn_param->srq; 3568 } 3569 3570 if (rdma_cap_ib_cm(id->device, id->port_num)) { 3571 if (id->qp_type == IB_QPT_UD) { 3572 if (conn_param) 3573 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS, 3574 conn_param->qkey, 3575 conn_param->private_data, 3576 conn_param->private_data_len); 3577 else 3578 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS, 3579 0, NULL, 0); 3580 } else { 3581 if (conn_param) 3582 ret = cma_accept_ib(id_priv, conn_param); 3583 else 3584 ret = cma_rep_recv(id_priv); 3585 } 3586 } else if (rdma_cap_iw_cm(id->device, id->port_num)) 3587 ret = cma_accept_iw(id_priv, conn_param); 3588 else 3589 ret = -ENOSYS; 3590 3591 if (ret) 3592 goto reject; 3593 3594 return 0; 3595 reject: 3596 cma_modify_qp_err(id_priv); 3597 rdma_reject(id, NULL, 0); 3598 return ret; 3599 } 3600 EXPORT_SYMBOL(rdma_accept); 3601 3602 int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event) 3603 { 3604 struct rdma_id_private *id_priv; 3605 int ret; 3606 3607 id_priv = container_of(id, struct rdma_id_private, id); 3608 if (!id_priv->cm_id.ib) 3609 return -EINVAL; 3610 3611 switch (id->device->node_type) { 3612 case RDMA_NODE_IB_CA: 3613 ret = ib_cm_notify(id_priv->cm_id.ib, event); 3614 break; 3615 default: 3616 ret = 0; 3617 break; 3618 } 3619 return ret; 3620 } 3621 EXPORT_SYMBOL(rdma_notify); 3622 3623 int rdma_reject(struct rdma_cm_id *id, const void *private_data, 3624 u8 private_data_len) 3625 { 3626 struct rdma_id_private *id_priv; 3627 int ret; 3628 3629 id_priv = container_of(id, struct rdma_id_private, id); 3630 if (!id_priv->cm_id.ib) 3631 return -EINVAL; 3632 3633 if (rdma_cap_ib_cm(id->device, id->port_num)) { 3634 if (id->qp_type == IB_QPT_UD) 3635 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0, 3636 private_data, private_data_len); 3637 else 3638 ret = ib_send_cm_rej(id_priv->cm_id.ib, 3639 IB_CM_REJ_CONSUMER_DEFINED, NULL, 3640 0, private_data, private_data_len); 3641 } else if (rdma_cap_iw_cm(id->device, id->port_num)) { 3642 ret = iw_cm_reject(id_priv->cm_id.iw, 3643 private_data, private_data_len); 3644 } else 3645 ret = -ENOSYS; 3646 3647 return ret; 3648 } 3649 EXPORT_SYMBOL(rdma_reject); 3650 3651 int rdma_disconnect(struct rdma_cm_id *id) 3652 { 3653 struct rdma_id_private *id_priv; 3654 int ret; 3655 3656 id_priv = container_of(id, struct rdma_id_private, id); 3657 if (!id_priv->cm_id.ib) 3658 return -EINVAL; 3659 3660 if (rdma_cap_ib_cm(id->device, id->port_num)) { 3661 ret = cma_modify_qp_err(id_priv); 3662 if (ret) 3663 goto out; 3664 /* Initiate or respond to a disconnect. */ 3665 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0)) 3666 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0); 3667 } else if (rdma_cap_iw_cm(id->device, id->port_num)) { 3668 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0); 3669 } else 3670 ret = -EINVAL; 3671 3672 out: 3673 return ret; 3674 } 3675 EXPORT_SYMBOL(rdma_disconnect); 3676 3677 static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast) 3678 { 3679 struct rdma_id_private *id_priv; 3680 struct cma_multicast *mc = multicast->context; 3681 struct rdma_cm_event event; 3682 int ret = 0; 3683 3684 id_priv = mc->id_priv; 3685 mutex_lock(&id_priv->handler_mutex); 3686 if (id_priv->state != RDMA_CM_ADDR_BOUND && 3687 id_priv->state != RDMA_CM_ADDR_RESOLVED) 3688 goto out; 3689 3690 if (!status) 3691 status = cma_set_qkey(id_priv, be32_to_cpu(multicast->rec.qkey)); 3692 mutex_lock(&id_priv->qp_mutex); 3693 if (!status && id_priv->id.qp) 3694 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid, 3695 be16_to_cpu(multicast->rec.mlid)); 3696 mutex_unlock(&id_priv->qp_mutex); 3697 3698 memset(&event, 0, sizeof event); 3699 event.status = status; 3700 event.param.ud.private_data = mc->context; 3701 if (!status) { 3702 struct rdma_dev_addr *dev_addr = 3703 &id_priv->id.route.addr.dev_addr; 3704 struct net_device *ndev = 3705 dev_get_by_index(&init_net, dev_addr->bound_dev_if); 3706 enum ib_gid_type gid_type = 3707 id_priv->cma_dev->default_gid_type[id_priv->id.port_num - 3708 rdma_start_port(id_priv->cma_dev->device)]; 3709 3710 event.event = RDMA_CM_EVENT_MULTICAST_JOIN; 3711 ib_init_ah_from_mcmember(id_priv->id.device, 3712 id_priv->id.port_num, &multicast->rec, 3713 ndev, gid_type, 3714 &event.param.ud.ah_attr); 3715 event.param.ud.qp_num = 0xFFFFFF; 3716 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey); 3717 if (ndev) 3718 dev_put(ndev); 3719 } else 3720 event.event = RDMA_CM_EVENT_MULTICAST_ERROR; 3721 3722 ret = id_priv->id.event_handler(&id_priv->id, &event); 3723 if (ret) { 3724 cma_exch(id_priv, RDMA_CM_DESTROYING); 3725 mutex_unlock(&id_priv->handler_mutex); 3726 rdma_destroy_id(&id_priv->id); 3727 return 0; 3728 } 3729 3730 out: 3731 mutex_unlock(&id_priv->handler_mutex); 3732 return 0; 3733 } 3734 3735 static void cma_set_mgid(struct rdma_id_private *id_priv, 3736 struct sockaddr *addr, union ib_gid *mgid) 3737 { 3738 unsigned char mc_map[MAX_ADDR_LEN]; 3739 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 3740 struct sockaddr_in *sin = (struct sockaddr_in *) addr; 3741 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr; 3742 3743 if (cma_any_addr(addr)) { 3744 memset(mgid, 0, sizeof *mgid); 3745 } else if ((addr->sa_family == AF_INET6) && 3746 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) == 3747 0xFF10A01B)) { 3748 /* IPv6 address is an SA assigned MGID. */ 3749 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid); 3750 } else if (addr->sa_family == AF_IB) { 3751 memcpy(mgid, &((struct sockaddr_ib *) addr)->sib_addr, sizeof *mgid); 3752 } else if ((addr->sa_family == AF_INET6)) { 3753 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map); 3754 if (id_priv->id.ps == RDMA_PS_UDP) 3755 mc_map[7] = 0x01; /* Use RDMA CM signature */ 3756 *mgid = *(union ib_gid *) (mc_map + 4); 3757 } else { 3758 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map); 3759 if (id_priv->id.ps == RDMA_PS_UDP) 3760 mc_map[7] = 0x01; /* Use RDMA CM signature */ 3761 *mgid = *(union ib_gid *) (mc_map + 4); 3762 } 3763 } 3764 3765 static void cma_query_sa_classport_info_cb(int status, 3766 struct ib_class_port_info *rec, 3767 void *context) 3768 { 3769 struct class_port_info_context *cb_ctx = context; 3770 3771 WARN_ON(!context); 3772 3773 if (status || !rec) { 3774 pr_debug("RDMA CM: %s port %u failed query ClassPortInfo status: %d\n", 3775 cb_ctx->device->name, cb_ctx->port_num, status); 3776 goto out; 3777 } 3778 3779 memcpy(cb_ctx->class_port_info, rec, sizeof(struct ib_class_port_info)); 3780 3781 out: 3782 complete(&cb_ctx->done); 3783 } 3784 3785 static int cma_query_sa_classport_info(struct ib_device *device, u8 port_num, 3786 struct ib_class_port_info *class_port_info) 3787 { 3788 struct class_port_info_context *cb_ctx; 3789 int ret; 3790 3791 cb_ctx = kmalloc(sizeof(*cb_ctx), GFP_KERNEL); 3792 if (!cb_ctx) 3793 return -ENOMEM; 3794 3795 cb_ctx->device = device; 3796 cb_ctx->class_port_info = class_port_info; 3797 cb_ctx->port_num = port_num; 3798 init_completion(&cb_ctx->done); 3799 3800 ret = ib_sa_classport_info_rec_query(&sa_client, device, port_num, 3801 CMA_QUERY_CLASSPORT_INFO_TIMEOUT, 3802 GFP_KERNEL, cma_query_sa_classport_info_cb, 3803 cb_ctx, &cb_ctx->sa_query); 3804 if (ret < 0) { 3805 pr_err("RDMA CM: %s port %u failed to send ClassPortInfo query, ret: %d\n", 3806 device->name, port_num, ret); 3807 goto out; 3808 } 3809 3810 wait_for_completion(&cb_ctx->done); 3811 3812 out: 3813 kfree(cb_ctx); 3814 return ret; 3815 } 3816 3817 static int cma_join_ib_multicast(struct rdma_id_private *id_priv, 3818 struct cma_multicast *mc) 3819 { 3820 struct ib_sa_mcmember_rec rec; 3821 struct ib_class_port_info class_port_info; 3822 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 3823 ib_sa_comp_mask comp_mask; 3824 int ret; 3825 3826 ib_addr_get_mgid(dev_addr, &rec.mgid); 3827 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num, 3828 &rec.mgid, &rec); 3829 if (ret) 3830 return ret; 3831 3832 ret = cma_set_qkey(id_priv, 0); 3833 if (ret) 3834 return ret; 3835 3836 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid); 3837 rec.qkey = cpu_to_be32(id_priv->qkey); 3838 rdma_addr_get_sgid(dev_addr, &rec.port_gid); 3839 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); 3840 rec.join_state = mc->join_state; 3841 3842 if (rec.join_state == BIT(SENDONLY_FULLMEMBER_JOIN)) { 3843 ret = cma_query_sa_classport_info(id_priv->id.device, 3844 id_priv->id.port_num, 3845 &class_port_info); 3846 3847 if (ret) 3848 return ret; 3849 3850 if (!(ib_get_cpi_capmask2(&class_port_info) & 3851 IB_SA_CAP_MASK2_SENDONLY_FULL_MEM_SUPPORT)) { 3852 pr_warn("RDMA CM: %s port %u Unable to multicast join\n" 3853 "RDMA CM: SM doesn't support Send Only Full Member option\n", 3854 id_priv->id.device->name, id_priv->id.port_num); 3855 return -EOPNOTSUPP; 3856 } 3857 } 3858 3859 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID | 3860 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE | 3861 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL | 3862 IB_SA_MCMEMBER_REC_FLOW_LABEL | 3863 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS; 3864 3865 if (id_priv->id.ps == RDMA_PS_IPOIB) 3866 comp_mask |= IB_SA_MCMEMBER_REC_RATE | 3867 IB_SA_MCMEMBER_REC_RATE_SELECTOR | 3868 IB_SA_MCMEMBER_REC_MTU_SELECTOR | 3869 IB_SA_MCMEMBER_REC_MTU | 3870 IB_SA_MCMEMBER_REC_HOP_LIMIT; 3871 3872 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device, 3873 id_priv->id.port_num, &rec, 3874 comp_mask, GFP_KERNEL, 3875 cma_ib_mc_handler, mc); 3876 return PTR_ERR_OR_ZERO(mc->multicast.ib); 3877 } 3878 3879 static void iboe_mcast_work_handler(struct work_struct *work) 3880 { 3881 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work); 3882 struct cma_multicast *mc = mw->mc; 3883 struct ib_sa_multicast *m = mc->multicast.ib; 3884 3885 mc->multicast.ib->context = mc; 3886 cma_ib_mc_handler(0, m); 3887 kref_put(&mc->mcref, release_mc); 3888 kfree(mw); 3889 } 3890 3891 static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid) 3892 { 3893 struct sockaddr_in *sin = (struct sockaddr_in *)addr; 3894 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr; 3895 3896 if (cma_any_addr(addr)) { 3897 memset(mgid, 0, sizeof *mgid); 3898 } else if (addr->sa_family == AF_INET6) { 3899 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid); 3900 } else { 3901 mgid->raw[0] = 0xff; 3902 mgid->raw[1] = 0x0e; 3903 mgid->raw[2] = 0; 3904 mgid->raw[3] = 0; 3905 mgid->raw[4] = 0; 3906 mgid->raw[5] = 0; 3907 mgid->raw[6] = 0; 3908 mgid->raw[7] = 0; 3909 mgid->raw[8] = 0; 3910 mgid->raw[9] = 0; 3911 mgid->raw[10] = 0xff; 3912 mgid->raw[11] = 0xff; 3913 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr; 3914 } 3915 } 3916 3917 static int cma_iboe_join_multicast(struct rdma_id_private *id_priv, 3918 struct cma_multicast *mc) 3919 { 3920 struct iboe_mcast_work *work; 3921 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 3922 int err = 0; 3923 struct sockaddr *addr = (struct sockaddr *)&mc->addr; 3924 struct net_device *ndev = NULL; 3925 enum ib_gid_type gid_type; 3926 bool send_only; 3927 3928 send_only = mc->join_state == BIT(SENDONLY_FULLMEMBER_JOIN); 3929 3930 if (cma_zero_addr((struct sockaddr *)&mc->addr)) 3931 return -EINVAL; 3932 3933 work = kzalloc(sizeof *work, GFP_KERNEL); 3934 if (!work) 3935 return -ENOMEM; 3936 3937 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL); 3938 if (!mc->multicast.ib) { 3939 err = -ENOMEM; 3940 goto out1; 3941 } 3942 3943 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid); 3944 3945 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff); 3946 if (id_priv->id.ps == RDMA_PS_UDP) 3947 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY); 3948 3949 if (dev_addr->bound_dev_if) 3950 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if); 3951 if (!ndev) { 3952 err = -ENODEV; 3953 goto out2; 3954 } 3955 mc->multicast.ib->rec.rate = iboe_get_rate(ndev); 3956 mc->multicast.ib->rec.hop_limit = 1; 3957 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu); 3958 3959 gid_type = id_priv->cma_dev->default_gid_type[id_priv->id.port_num - 3960 rdma_start_port(id_priv->cma_dev->device)]; 3961 if (addr->sa_family == AF_INET) { 3962 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) { 3963 mc->multicast.ib->rec.hop_limit = IPV6_DEFAULT_HOPLIMIT; 3964 if (!send_only) { 3965 err = cma_igmp_send(ndev, &mc->multicast.ib->rec.mgid, 3966 true); 3967 if (!err) 3968 mc->igmp_joined = true; 3969 } 3970 } 3971 } else { 3972 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) 3973 err = -ENOTSUPP; 3974 } 3975 dev_put(ndev); 3976 if (err || !mc->multicast.ib->rec.mtu) { 3977 if (!err) 3978 err = -EINVAL; 3979 goto out2; 3980 } 3981 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr, 3982 &mc->multicast.ib->rec.port_gid); 3983 work->id = id_priv; 3984 work->mc = mc; 3985 INIT_WORK(&work->work, iboe_mcast_work_handler); 3986 kref_get(&mc->mcref); 3987 queue_work(cma_wq, &work->work); 3988 3989 return 0; 3990 3991 out2: 3992 kfree(mc->multicast.ib); 3993 out1: 3994 kfree(work); 3995 return err; 3996 } 3997 3998 int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr, 3999 u8 join_state, void *context) 4000 { 4001 struct rdma_id_private *id_priv; 4002 struct cma_multicast *mc; 4003 int ret; 4004 4005 id_priv = container_of(id, struct rdma_id_private, id); 4006 if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) && 4007 !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED)) 4008 return -EINVAL; 4009 4010 mc = kmalloc(sizeof *mc, GFP_KERNEL); 4011 if (!mc) 4012 return -ENOMEM; 4013 4014 memcpy(&mc->addr, addr, rdma_addr_size(addr)); 4015 mc->context = context; 4016 mc->id_priv = id_priv; 4017 mc->igmp_joined = false; 4018 mc->join_state = join_state; 4019 spin_lock(&id_priv->lock); 4020 list_add(&mc->list, &id_priv->mc_list); 4021 spin_unlock(&id_priv->lock); 4022 4023 if (rdma_protocol_roce(id->device, id->port_num)) { 4024 kref_init(&mc->mcref); 4025 ret = cma_iboe_join_multicast(id_priv, mc); 4026 } else if (rdma_cap_ib_mcast(id->device, id->port_num)) 4027 ret = cma_join_ib_multicast(id_priv, mc); 4028 else 4029 ret = -ENOSYS; 4030 4031 if (ret) { 4032 spin_lock_irq(&id_priv->lock); 4033 list_del(&mc->list); 4034 spin_unlock_irq(&id_priv->lock); 4035 kfree(mc); 4036 } 4037 return ret; 4038 } 4039 EXPORT_SYMBOL(rdma_join_multicast); 4040 4041 void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr) 4042 { 4043 struct rdma_id_private *id_priv; 4044 struct cma_multicast *mc; 4045 4046 id_priv = container_of(id, struct rdma_id_private, id); 4047 spin_lock_irq(&id_priv->lock); 4048 list_for_each_entry(mc, &id_priv->mc_list, list) { 4049 if (!memcmp(&mc->addr, addr, rdma_addr_size(addr))) { 4050 list_del(&mc->list); 4051 spin_unlock_irq(&id_priv->lock); 4052 4053 if (id->qp) 4054 ib_detach_mcast(id->qp, 4055 &mc->multicast.ib->rec.mgid, 4056 be16_to_cpu(mc->multicast.ib->rec.mlid)); 4057 4058 BUG_ON(id_priv->cma_dev->device != id->device); 4059 4060 if (rdma_cap_ib_mcast(id->device, id->port_num)) { 4061 ib_sa_free_multicast(mc->multicast.ib); 4062 kfree(mc); 4063 } else if (rdma_protocol_roce(id->device, id->port_num)) { 4064 if (mc->igmp_joined) { 4065 struct rdma_dev_addr *dev_addr = 4066 &id->route.addr.dev_addr; 4067 struct net_device *ndev = NULL; 4068 4069 if (dev_addr->bound_dev_if) 4070 ndev = dev_get_by_index(&init_net, 4071 dev_addr->bound_dev_if); 4072 if (ndev) { 4073 cma_igmp_send(ndev, 4074 &mc->multicast.ib->rec.mgid, 4075 false); 4076 dev_put(ndev); 4077 } 4078 mc->igmp_joined = false; 4079 } 4080 kref_put(&mc->mcref, release_mc); 4081 } 4082 return; 4083 } 4084 } 4085 spin_unlock_irq(&id_priv->lock); 4086 } 4087 EXPORT_SYMBOL(rdma_leave_multicast); 4088 4089 static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv) 4090 { 4091 struct rdma_dev_addr *dev_addr; 4092 struct cma_ndev_work *work; 4093 4094 dev_addr = &id_priv->id.route.addr.dev_addr; 4095 4096 if ((dev_addr->bound_dev_if == ndev->ifindex) && 4097 (net_eq(dev_net(ndev), dev_addr->net)) && 4098 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) { 4099 pr_info("RDMA CM addr change for ndev %s used by id %p\n", 4100 ndev->name, &id_priv->id); 4101 work = kzalloc(sizeof *work, GFP_KERNEL); 4102 if (!work) 4103 return -ENOMEM; 4104 4105 INIT_WORK(&work->work, cma_ndev_work_handler); 4106 work->id = id_priv; 4107 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE; 4108 atomic_inc(&id_priv->refcount); 4109 queue_work(cma_wq, &work->work); 4110 } 4111 4112 return 0; 4113 } 4114 4115 static int cma_netdev_callback(struct notifier_block *self, unsigned long event, 4116 void *ptr) 4117 { 4118 struct net_device *ndev = netdev_notifier_info_to_dev(ptr); 4119 struct cma_device *cma_dev; 4120 struct rdma_id_private *id_priv; 4121 int ret = NOTIFY_DONE; 4122 4123 if (event != NETDEV_BONDING_FAILOVER) 4124 return NOTIFY_DONE; 4125 4126 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING)) 4127 return NOTIFY_DONE; 4128 4129 mutex_lock(&lock); 4130 list_for_each_entry(cma_dev, &dev_list, list) 4131 list_for_each_entry(id_priv, &cma_dev->id_list, list) { 4132 ret = cma_netdev_change(ndev, id_priv); 4133 if (ret) 4134 goto out; 4135 } 4136 4137 out: 4138 mutex_unlock(&lock); 4139 return ret; 4140 } 4141 4142 static struct notifier_block cma_nb = { 4143 .notifier_call = cma_netdev_callback 4144 }; 4145 4146 static void cma_add_one(struct ib_device *device) 4147 { 4148 struct cma_device *cma_dev; 4149 struct rdma_id_private *id_priv; 4150 unsigned int i; 4151 unsigned long supported_gids = 0; 4152 4153 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL); 4154 if (!cma_dev) 4155 return; 4156 4157 cma_dev->device = device; 4158 cma_dev->default_gid_type = kcalloc(device->phys_port_cnt, 4159 sizeof(*cma_dev->default_gid_type), 4160 GFP_KERNEL); 4161 if (!cma_dev->default_gid_type) { 4162 kfree(cma_dev); 4163 return; 4164 } 4165 for (i = rdma_start_port(device); i <= rdma_end_port(device); i++) { 4166 supported_gids = roce_gid_type_mask_support(device, i); 4167 WARN_ON(!supported_gids); 4168 cma_dev->default_gid_type[i - rdma_start_port(device)] = 4169 find_first_bit(&supported_gids, BITS_PER_LONG); 4170 } 4171 4172 init_completion(&cma_dev->comp); 4173 atomic_set(&cma_dev->refcount, 1); 4174 INIT_LIST_HEAD(&cma_dev->id_list); 4175 ib_set_client_data(device, &cma_client, cma_dev); 4176 4177 mutex_lock(&lock); 4178 list_add_tail(&cma_dev->list, &dev_list); 4179 list_for_each_entry(id_priv, &listen_any_list, list) 4180 cma_listen_on_dev(id_priv, cma_dev); 4181 mutex_unlock(&lock); 4182 } 4183 4184 static int cma_remove_id_dev(struct rdma_id_private *id_priv) 4185 { 4186 struct rdma_cm_event event; 4187 enum rdma_cm_state state; 4188 int ret = 0; 4189 4190 /* Record that we want to remove the device */ 4191 state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL); 4192 if (state == RDMA_CM_DESTROYING) 4193 return 0; 4194 4195 cma_cancel_operation(id_priv, state); 4196 mutex_lock(&id_priv->handler_mutex); 4197 4198 /* Check for destruction from another callback. */ 4199 if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL)) 4200 goto out; 4201 4202 memset(&event, 0, sizeof event); 4203 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL; 4204 ret = id_priv->id.event_handler(&id_priv->id, &event); 4205 out: 4206 mutex_unlock(&id_priv->handler_mutex); 4207 return ret; 4208 } 4209 4210 static void cma_process_remove(struct cma_device *cma_dev) 4211 { 4212 struct rdma_id_private *id_priv; 4213 int ret; 4214 4215 mutex_lock(&lock); 4216 while (!list_empty(&cma_dev->id_list)) { 4217 id_priv = list_entry(cma_dev->id_list.next, 4218 struct rdma_id_private, list); 4219 4220 list_del(&id_priv->listen_list); 4221 list_del_init(&id_priv->list); 4222 atomic_inc(&id_priv->refcount); 4223 mutex_unlock(&lock); 4224 4225 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv); 4226 cma_deref_id(id_priv); 4227 if (ret) 4228 rdma_destroy_id(&id_priv->id); 4229 4230 mutex_lock(&lock); 4231 } 4232 mutex_unlock(&lock); 4233 4234 cma_deref_dev(cma_dev); 4235 wait_for_completion(&cma_dev->comp); 4236 } 4237 4238 static void cma_remove_one(struct ib_device *device, void *client_data) 4239 { 4240 struct cma_device *cma_dev = client_data; 4241 4242 if (!cma_dev) 4243 return; 4244 4245 mutex_lock(&lock); 4246 list_del(&cma_dev->list); 4247 mutex_unlock(&lock); 4248 4249 cma_process_remove(cma_dev); 4250 kfree(cma_dev->default_gid_type); 4251 kfree(cma_dev); 4252 } 4253 4254 static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb) 4255 { 4256 struct nlmsghdr *nlh; 4257 struct rdma_cm_id_stats *id_stats; 4258 struct rdma_id_private *id_priv; 4259 struct rdma_cm_id *id = NULL; 4260 struct cma_device *cma_dev; 4261 int i_dev = 0, i_id = 0; 4262 4263 /* 4264 * We export all of the IDs as a sequence of messages. Each 4265 * ID gets its own netlink message. 4266 */ 4267 mutex_lock(&lock); 4268 4269 list_for_each_entry(cma_dev, &dev_list, list) { 4270 if (i_dev < cb->args[0]) { 4271 i_dev++; 4272 continue; 4273 } 4274 4275 i_id = 0; 4276 list_for_each_entry(id_priv, &cma_dev->id_list, list) { 4277 if (i_id < cb->args[1]) { 4278 i_id++; 4279 continue; 4280 } 4281 4282 id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq, 4283 sizeof *id_stats, RDMA_NL_RDMA_CM, 4284 RDMA_NL_RDMA_CM_ID_STATS, 4285 NLM_F_MULTI); 4286 if (!id_stats) 4287 goto out; 4288 4289 memset(id_stats, 0, sizeof *id_stats); 4290 id = &id_priv->id; 4291 id_stats->node_type = id->route.addr.dev_addr.dev_type; 4292 id_stats->port_num = id->port_num; 4293 id_stats->bound_dev_if = 4294 id->route.addr.dev_addr.bound_dev_if; 4295 4296 if (ibnl_put_attr(skb, nlh, 4297 rdma_addr_size(cma_src_addr(id_priv)), 4298 cma_src_addr(id_priv), 4299 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR)) 4300 goto out; 4301 if (ibnl_put_attr(skb, nlh, 4302 rdma_addr_size(cma_src_addr(id_priv)), 4303 cma_dst_addr(id_priv), 4304 RDMA_NL_RDMA_CM_ATTR_DST_ADDR)) 4305 goto out; 4306 4307 id_stats->pid = id_priv->owner; 4308 id_stats->port_space = id->ps; 4309 id_stats->cm_state = id_priv->state; 4310 id_stats->qp_num = id_priv->qp_num; 4311 id_stats->qp_type = id->qp_type; 4312 4313 i_id++; 4314 } 4315 4316 cb->args[1] = 0; 4317 i_dev++; 4318 } 4319 4320 out: 4321 mutex_unlock(&lock); 4322 cb->args[0] = i_dev; 4323 cb->args[1] = i_id; 4324 4325 return skb->len; 4326 } 4327 4328 static const struct ibnl_client_cbs cma_cb_table[] = { 4329 [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats, 4330 .module = THIS_MODULE }, 4331 }; 4332 4333 static int cma_init_net(struct net *net) 4334 { 4335 struct cma_pernet *pernet = cma_pernet(net); 4336 4337 idr_init(&pernet->tcp_ps); 4338 idr_init(&pernet->udp_ps); 4339 idr_init(&pernet->ipoib_ps); 4340 idr_init(&pernet->ib_ps); 4341 4342 return 0; 4343 } 4344 4345 static void cma_exit_net(struct net *net) 4346 { 4347 struct cma_pernet *pernet = cma_pernet(net); 4348 4349 idr_destroy(&pernet->tcp_ps); 4350 idr_destroy(&pernet->udp_ps); 4351 idr_destroy(&pernet->ipoib_ps); 4352 idr_destroy(&pernet->ib_ps); 4353 } 4354 4355 static struct pernet_operations cma_pernet_operations = { 4356 .init = cma_init_net, 4357 .exit = cma_exit_net, 4358 .id = &cma_pernet_id, 4359 .size = sizeof(struct cma_pernet), 4360 }; 4361 4362 static int __init cma_init(void) 4363 { 4364 int ret; 4365 4366 cma_wq = create_singlethread_workqueue("rdma_cm"); 4367 if (!cma_wq) 4368 return -ENOMEM; 4369 4370 ret = register_pernet_subsys(&cma_pernet_operations); 4371 if (ret) 4372 goto err_wq; 4373 4374 ib_sa_register_client(&sa_client); 4375 rdma_addr_register_client(&addr_client); 4376 register_netdevice_notifier(&cma_nb); 4377 4378 ret = ib_register_client(&cma_client); 4379 if (ret) 4380 goto err; 4381 4382 if (ibnl_add_client(RDMA_NL_RDMA_CM, ARRAY_SIZE(cma_cb_table), 4383 cma_cb_table)) 4384 pr_warn("RDMA CMA: failed to add netlink callback\n"); 4385 cma_configfs_init(); 4386 4387 return 0; 4388 4389 err: 4390 unregister_netdevice_notifier(&cma_nb); 4391 rdma_addr_unregister_client(&addr_client); 4392 ib_sa_unregister_client(&sa_client); 4393 err_wq: 4394 destroy_workqueue(cma_wq); 4395 return ret; 4396 } 4397 4398 static void __exit cma_cleanup(void) 4399 { 4400 cma_configfs_exit(); 4401 ibnl_remove_client(RDMA_NL_RDMA_CM); 4402 ib_unregister_client(&cma_client); 4403 unregister_netdevice_notifier(&cma_nb); 4404 rdma_addr_unregister_client(&addr_client); 4405 ib_sa_unregister_client(&sa_client); 4406 unregister_pernet_subsys(&cma_pernet_operations); 4407 destroy_workqueue(cma_wq); 4408 } 4409 4410 module_init(cma_init); 4411 module_exit(cma_cleanup); 4412