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_in *src_addr, 1098 struct sockaddr_in *dst_addr, 1099 struct cma_hdr *hdr, 1100 __be16 local_port) 1101 { 1102 if (src_addr) { 1103 *src_addr = (struct sockaddr_in) { 1104 .sin_family = AF_INET, 1105 .sin_addr.s_addr = hdr->dst_addr.ip4.addr, 1106 .sin_port = local_port, 1107 }; 1108 } 1109 1110 if (dst_addr) { 1111 *dst_addr = (struct sockaddr_in) { 1112 .sin_family = AF_INET, 1113 .sin_addr.s_addr = hdr->src_addr.ip4.addr, 1114 .sin_port = hdr->port, 1115 }; 1116 } 1117 } 1118 1119 static void cma_save_ip6_info(struct sockaddr_in6 *src_addr, 1120 struct sockaddr_in6 *dst_addr, 1121 struct cma_hdr *hdr, 1122 __be16 local_port) 1123 { 1124 if (src_addr) { 1125 *src_addr = (struct sockaddr_in6) { 1126 .sin6_family = AF_INET6, 1127 .sin6_addr = hdr->dst_addr.ip6, 1128 .sin6_port = local_port, 1129 }; 1130 } 1131 1132 if (dst_addr) { 1133 *dst_addr = (struct sockaddr_in6) { 1134 .sin6_family = AF_INET6, 1135 .sin6_addr = hdr->src_addr.ip6, 1136 .sin6_port = hdr->port, 1137 }; 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((struct sockaddr_in *)src_addr, 1163 (struct sockaddr_in *)dst_addr, hdr, port); 1164 break; 1165 case 6: 1166 cma_save_ip6_info((struct sockaddr_in6 *)src_addr, 1167 (struct sockaddr_in6 *)dst_addr, hdr, port); 1168 break; 1169 default: 1170 return -EAFNOSUPPORT; 1171 } 1172 1173 return 0; 1174 } 1175 1176 static int cma_save_net_info(struct sockaddr *src_addr, 1177 struct sockaddr *dst_addr, 1178 struct rdma_cm_id *listen_id, 1179 struct ib_cm_event *ib_event, 1180 sa_family_t sa_family, __be64 service_id) 1181 { 1182 if (sa_family == AF_IB) { 1183 if (ib_event->event == IB_CM_REQ_RECEIVED) 1184 cma_save_ib_info(src_addr, dst_addr, listen_id, 1185 ib_event->param.req_rcvd.primary_path); 1186 else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) 1187 cma_save_ib_info(src_addr, dst_addr, listen_id, NULL); 1188 return 0; 1189 } 1190 1191 return cma_save_ip_info(src_addr, dst_addr, ib_event, service_id); 1192 } 1193 1194 static int cma_save_req_info(const struct ib_cm_event *ib_event, 1195 struct cma_req_info *req) 1196 { 1197 const struct ib_cm_req_event_param *req_param = 1198 &ib_event->param.req_rcvd; 1199 const struct ib_cm_sidr_req_event_param *sidr_param = 1200 &ib_event->param.sidr_req_rcvd; 1201 1202 switch (ib_event->event) { 1203 case IB_CM_REQ_RECEIVED: 1204 req->device = req_param->listen_id->device; 1205 req->port = req_param->port; 1206 memcpy(&req->local_gid, &req_param->primary_path->sgid, 1207 sizeof(req->local_gid)); 1208 req->has_gid = true; 1209 req->service_id = req_param->primary_path->service_id; 1210 req->pkey = be16_to_cpu(req_param->primary_path->pkey); 1211 if (req->pkey != req_param->bth_pkey) 1212 pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and primary path P_Key (0x%x)\n" 1213 "RDMA CMA: in the future this may cause the request to be dropped\n", 1214 req_param->bth_pkey, req->pkey); 1215 break; 1216 case IB_CM_SIDR_REQ_RECEIVED: 1217 req->device = sidr_param->listen_id->device; 1218 req->port = sidr_param->port; 1219 req->has_gid = false; 1220 req->service_id = sidr_param->service_id; 1221 req->pkey = sidr_param->pkey; 1222 if (req->pkey != sidr_param->bth_pkey) 1223 pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and SIDR request payload P_Key (0x%x)\n" 1224 "RDMA CMA: in the future this may cause the request to be dropped\n", 1225 sidr_param->bth_pkey, req->pkey); 1226 break; 1227 default: 1228 return -EINVAL; 1229 } 1230 1231 return 0; 1232 } 1233 1234 static bool validate_ipv4_net_dev(struct net_device *net_dev, 1235 const struct sockaddr_in *dst_addr, 1236 const struct sockaddr_in *src_addr) 1237 { 1238 __be32 daddr = dst_addr->sin_addr.s_addr, 1239 saddr = src_addr->sin_addr.s_addr; 1240 struct fib_result res; 1241 struct flowi4 fl4; 1242 int err; 1243 bool ret; 1244 1245 if (ipv4_is_multicast(saddr) || ipv4_is_lbcast(saddr) || 1246 ipv4_is_lbcast(daddr) || ipv4_is_zeronet(saddr) || 1247 ipv4_is_zeronet(daddr) || ipv4_is_loopback(daddr) || 1248 ipv4_is_loopback(saddr)) 1249 return false; 1250 1251 memset(&fl4, 0, sizeof(fl4)); 1252 fl4.flowi4_iif = net_dev->ifindex; 1253 fl4.daddr = daddr; 1254 fl4.saddr = saddr; 1255 1256 rcu_read_lock(); 1257 err = fib_lookup(dev_net(net_dev), &fl4, &res, 0); 1258 ret = err == 0 && FIB_RES_DEV(res) == net_dev; 1259 rcu_read_unlock(); 1260 1261 return ret; 1262 } 1263 1264 static bool validate_ipv6_net_dev(struct net_device *net_dev, 1265 const struct sockaddr_in6 *dst_addr, 1266 const struct sockaddr_in6 *src_addr) 1267 { 1268 #if IS_ENABLED(CONFIG_IPV6) 1269 const int strict = ipv6_addr_type(&dst_addr->sin6_addr) & 1270 IPV6_ADDR_LINKLOCAL; 1271 struct rt6_info *rt = rt6_lookup(dev_net(net_dev), &dst_addr->sin6_addr, 1272 &src_addr->sin6_addr, net_dev->ifindex, 1273 strict); 1274 bool ret; 1275 1276 if (!rt) 1277 return false; 1278 1279 ret = rt->rt6i_idev->dev == net_dev; 1280 ip6_rt_put(rt); 1281 1282 return ret; 1283 #else 1284 return false; 1285 #endif 1286 } 1287 1288 static bool validate_net_dev(struct net_device *net_dev, 1289 const struct sockaddr *daddr, 1290 const struct sockaddr *saddr) 1291 { 1292 const struct sockaddr_in *daddr4 = (const struct sockaddr_in *)daddr; 1293 const struct sockaddr_in *saddr4 = (const struct sockaddr_in *)saddr; 1294 const struct sockaddr_in6 *daddr6 = (const struct sockaddr_in6 *)daddr; 1295 const struct sockaddr_in6 *saddr6 = (const struct sockaddr_in6 *)saddr; 1296 1297 switch (daddr->sa_family) { 1298 case AF_INET: 1299 return saddr->sa_family == AF_INET && 1300 validate_ipv4_net_dev(net_dev, daddr4, saddr4); 1301 1302 case AF_INET6: 1303 return saddr->sa_family == AF_INET6 && 1304 validate_ipv6_net_dev(net_dev, daddr6, saddr6); 1305 1306 default: 1307 return false; 1308 } 1309 } 1310 1311 static struct net_device *cma_get_net_dev(struct ib_cm_event *ib_event, 1312 const struct cma_req_info *req) 1313 { 1314 struct sockaddr_storage listen_addr_storage, src_addr_storage; 1315 struct sockaddr *listen_addr = (struct sockaddr *)&listen_addr_storage, 1316 *src_addr = (struct sockaddr *)&src_addr_storage; 1317 struct net_device *net_dev; 1318 const union ib_gid *gid = req->has_gid ? &req->local_gid : NULL; 1319 int err; 1320 1321 err = cma_save_ip_info(listen_addr, src_addr, ib_event, 1322 req->service_id); 1323 if (err) 1324 return ERR_PTR(err); 1325 1326 net_dev = ib_get_net_dev_by_params(req->device, req->port, req->pkey, 1327 gid, listen_addr); 1328 if (!net_dev) 1329 return ERR_PTR(-ENODEV); 1330 1331 if (!validate_net_dev(net_dev, listen_addr, src_addr)) { 1332 dev_put(net_dev); 1333 return ERR_PTR(-EHOSTUNREACH); 1334 } 1335 1336 return net_dev; 1337 } 1338 1339 static enum rdma_port_space rdma_ps_from_service_id(__be64 service_id) 1340 { 1341 return (be64_to_cpu(service_id) >> 16) & 0xffff; 1342 } 1343 1344 static bool cma_match_private_data(struct rdma_id_private *id_priv, 1345 const struct cma_hdr *hdr) 1346 { 1347 struct sockaddr *addr = cma_src_addr(id_priv); 1348 __be32 ip4_addr; 1349 struct in6_addr ip6_addr; 1350 1351 if (cma_any_addr(addr) && !id_priv->afonly) 1352 return true; 1353 1354 switch (addr->sa_family) { 1355 case AF_INET: 1356 ip4_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr; 1357 if (cma_get_ip_ver(hdr) != 4) 1358 return false; 1359 if (!cma_any_addr(addr) && 1360 hdr->dst_addr.ip4.addr != ip4_addr) 1361 return false; 1362 break; 1363 case AF_INET6: 1364 ip6_addr = ((struct sockaddr_in6 *)addr)->sin6_addr; 1365 if (cma_get_ip_ver(hdr) != 6) 1366 return false; 1367 if (!cma_any_addr(addr) && 1368 memcmp(&hdr->dst_addr.ip6, &ip6_addr, sizeof(ip6_addr))) 1369 return false; 1370 break; 1371 case AF_IB: 1372 return true; 1373 default: 1374 return false; 1375 } 1376 1377 return true; 1378 } 1379 1380 static bool cma_protocol_roce_dev_port(struct ib_device *device, int port_num) 1381 { 1382 enum rdma_link_layer ll = rdma_port_get_link_layer(device, port_num); 1383 enum rdma_transport_type transport = 1384 rdma_node_get_transport(device->node_type); 1385 1386 return ll == IB_LINK_LAYER_ETHERNET && transport == RDMA_TRANSPORT_IB; 1387 } 1388 1389 static bool cma_protocol_roce(const struct rdma_cm_id *id) 1390 { 1391 struct ib_device *device = id->device; 1392 const int port_num = id->port_num ?: rdma_start_port(device); 1393 1394 return cma_protocol_roce_dev_port(device, port_num); 1395 } 1396 1397 static bool cma_match_net_dev(const struct rdma_cm_id *id, 1398 const struct net_device *net_dev, 1399 u8 port_num) 1400 { 1401 const struct rdma_addr *addr = &id->route.addr; 1402 1403 if (!net_dev) 1404 /* This request is an AF_IB request or a RoCE request */ 1405 return (!id->port_num || id->port_num == port_num) && 1406 (addr->src_addr.ss_family == AF_IB || 1407 cma_protocol_roce_dev_port(id->device, port_num)); 1408 1409 return !addr->dev_addr.bound_dev_if || 1410 (net_eq(dev_net(net_dev), addr->dev_addr.net) && 1411 addr->dev_addr.bound_dev_if == net_dev->ifindex); 1412 } 1413 1414 static struct rdma_id_private *cma_find_listener( 1415 const struct rdma_bind_list *bind_list, 1416 const struct ib_cm_id *cm_id, 1417 const struct ib_cm_event *ib_event, 1418 const struct cma_req_info *req, 1419 const struct net_device *net_dev) 1420 { 1421 struct rdma_id_private *id_priv, *id_priv_dev; 1422 1423 if (!bind_list) 1424 return ERR_PTR(-EINVAL); 1425 1426 hlist_for_each_entry(id_priv, &bind_list->owners, node) { 1427 if (cma_match_private_data(id_priv, ib_event->private_data)) { 1428 if (id_priv->id.device == cm_id->device && 1429 cma_match_net_dev(&id_priv->id, net_dev, req->port)) 1430 return id_priv; 1431 list_for_each_entry(id_priv_dev, 1432 &id_priv->listen_list, 1433 listen_list) { 1434 if (id_priv_dev->id.device == cm_id->device && 1435 cma_match_net_dev(&id_priv_dev->id, net_dev, req->port)) 1436 return id_priv_dev; 1437 } 1438 } 1439 } 1440 1441 return ERR_PTR(-EINVAL); 1442 } 1443 1444 static struct rdma_id_private *cma_id_from_event(struct ib_cm_id *cm_id, 1445 struct ib_cm_event *ib_event, 1446 struct net_device **net_dev) 1447 { 1448 struct cma_req_info req; 1449 struct rdma_bind_list *bind_list; 1450 struct rdma_id_private *id_priv; 1451 int err; 1452 1453 err = cma_save_req_info(ib_event, &req); 1454 if (err) 1455 return ERR_PTR(err); 1456 1457 *net_dev = cma_get_net_dev(ib_event, &req); 1458 if (IS_ERR(*net_dev)) { 1459 if (PTR_ERR(*net_dev) == -EAFNOSUPPORT) { 1460 /* Assuming the protocol is AF_IB */ 1461 *net_dev = NULL; 1462 } else if (cma_protocol_roce_dev_port(req.device, req.port)) { 1463 /* TODO find the net dev matching the request parameters 1464 * through the RoCE GID table */ 1465 *net_dev = NULL; 1466 } else { 1467 return ERR_CAST(*net_dev); 1468 } 1469 } 1470 1471 bind_list = cma_ps_find(*net_dev ? dev_net(*net_dev) : &init_net, 1472 rdma_ps_from_service_id(req.service_id), 1473 cma_port_from_service_id(req.service_id)); 1474 id_priv = cma_find_listener(bind_list, cm_id, ib_event, &req, *net_dev); 1475 if (IS_ERR(id_priv) && *net_dev) { 1476 dev_put(*net_dev); 1477 *net_dev = NULL; 1478 } 1479 1480 return id_priv; 1481 } 1482 1483 static inline int cma_user_data_offset(struct rdma_id_private *id_priv) 1484 { 1485 return cma_family(id_priv) == AF_IB ? 0 : sizeof(struct cma_hdr); 1486 } 1487 1488 static void cma_cancel_route(struct rdma_id_private *id_priv) 1489 { 1490 if (rdma_cap_ib_sa(id_priv->id.device, id_priv->id.port_num)) { 1491 if (id_priv->query) 1492 ib_sa_cancel_query(id_priv->query_id, id_priv->query); 1493 } 1494 } 1495 1496 static void cma_cancel_listens(struct rdma_id_private *id_priv) 1497 { 1498 struct rdma_id_private *dev_id_priv; 1499 1500 /* 1501 * Remove from listen_any_list to prevent added devices from spawning 1502 * additional listen requests. 1503 */ 1504 mutex_lock(&lock); 1505 list_del(&id_priv->list); 1506 1507 while (!list_empty(&id_priv->listen_list)) { 1508 dev_id_priv = list_entry(id_priv->listen_list.next, 1509 struct rdma_id_private, listen_list); 1510 /* sync with device removal to avoid duplicate destruction */ 1511 list_del_init(&dev_id_priv->list); 1512 list_del(&dev_id_priv->listen_list); 1513 mutex_unlock(&lock); 1514 1515 rdma_destroy_id(&dev_id_priv->id); 1516 mutex_lock(&lock); 1517 } 1518 mutex_unlock(&lock); 1519 } 1520 1521 static void cma_cancel_operation(struct rdma_id_private *id_priv, 1522 enum rdma_cm_state state) 1523 { 1524 switch (state) { 1525 case RDMA_CM_ADDR_QUERY: 1526 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr); 1527 break; 1528 case RDMA_CM_ROUTE_QUERY: 1529 cma_cancel_route(id_priv); 1530 break; 1531 case RDMA_CM_LISTEN: 1532 if (cma_any_addr(cma_src_addr(id_priv)) && !id_priv->cma_dev) 1533 cma_cancel_listens(id_priv); 1534 break; 1535 default: 1536 break; 1537 } 1538 } 1539 1540 static void cma_release_port(struct rdma_id_private *id_priv) 1541 { 1542 struct rdma_bind_list *bind_list = id_priv->bind_list; 1543 struct net *net = id_priv->id.route.addr.dev_addr.net; 1544 1545 if (!bind_list) 1546 return; 1547 1548 mutex_lock(&lock); 1549 hlist_del(&id_priv->node); 1550 if (hlist_empty(&bind_list->owners)) { 1551 cma_ps_remove(net, bind_list->ps, bind_list->port); 1552 kfree(bind_list); 1553 } 1554 mutex_unlock(&lock); 1555 } 1556 1557 static void cma_leave_mc_groups(struct rdma_id_private *id_priv) 1558 { 1559 struct cma_multicast *mc; 1560 1561 while (!list_empty(&id_priv->mc_list)) { 1562 mc = container_of(id_priv->mc_list.next, 1563 struct cma_multicast, list); 1564 list_del(&mc->list); 1565 if (rdma_cap_ib_mcast(id_priv->cma_dev->device, 1566 id_priv->id.port_num)) { 1567 ib_sa_free_multicast(mc->multicast.ib); 1568 kfree(mc); 1569 } else { 1570 if (mc->igmp_joined) { 1571 struct rdma_dev_addr *dev_addr = 1572 &id_priv->id.route.addr.dev_addr; 1573 struct net_device *ndev = NULL; 1574 1575 if (dev_addr->bound_dev_if) 1576 ndev = dev_get_by_index(&init_net, 1577 dev_addr->bound_dev_if); 1578 if (ndev) { 1579 cma_igmp_send(ndev, 1580 &mc->multicast.ib->rec.mgid, 1581 false); 1582 dev_put(ndev); 1583 } 1584 } 1585 kref_put(&mc->mcref, release_mc); 1586 } 1587 } 1588 } 1589 1590 void rdma_destroy_id(struct rdma_cm_id *id) 1591 { 1592 struct rdma_id_private *id_priv; 1593 enum rdma_cm_state state; 1594 1595 id_priv = container_of(id, struct rdma_id_private, id); 1596 state = cma_exch(id_priv, RDMA_CM_DESTROYING); 1597 cma_cancel_operation(id_priv, state); 1598 1599 /* 1600 * Wait for any active callback to finish. New callbacks will find 1601 * the id_priv state set to destroying and abort. 1602 */ 1603 mutex_lock(&id_priv->handler_mutex); 1604 mutex_unlock(&id_priv->handler_mutex); 1605 1606 if (id_priv->cma_dev) { 1607 if (rdma_cap_ib_cm(id_priv->id.device, 1)) { 1608 if (id_priv->cm_id.ib) 1609 ib_destroy_cm_id(id_priv->cm_id.ib); 1610 } else if (rdma_cap_iw_cm(id_priv->id.device, 1)) { 1611 if (id_priv->cm_id.iw) 1612 iw_destroy_cm_id(id_priv->cm_id.iw); 1613 } 1614 cma_leave_mc_groups(id_priv); 1615 cma_release_dev(id_priv); 1616 } 1617 1618 cma_release_port(id_priv); 1619 cma_deref_id(id_priv); 1620 wait_for_completion(&id_priv->comp); 1621 1622 if (id_priv->internal_id) 1623 cma_deref_id(id_priv->id.context); 1624 1625 kfree(id_priv->id.route.path_rec); 1626 put_net(id_priv->id.route.addr.dev_addr.net); 1627 kfree(id_priv); 1628 } 1629 EXPORT_SYMBOL(rdma_destroy_id); 1630 1631 static int cma_rep_recv(struct rdma_id_private *id_priv) 1632 { 1633 int ret; 1634 1635 ret = cma_modify_qp_rtr(id_priv, NULL); 1636 if (ret) 1637 goto reject; 1638 1639 ret = cma_modify_qp_rts(id_priv, NULL); 1640 if (ret) 1641 goto reject; 1642 1643 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0); 1644 if (ret) 1645 goto reject; 1646 1647 return 0; 1648 reject: 1649 cma_modify_qp_err(id_priv); 1650 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED, 1651 NULL, 0, NULL, 0); 1652 return ret; 1653 } 1654 1655 static void cma_set_rep_event_data(struct rdma_cm_event *event, 1656 struct ib_cm_rep_event_param *rep_data, 1657 void *private_data) 1658 { 1659 event->param.conn.private_data = private_data; 1660 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE; 1661 event->param.conn.responder_resources = rep_data->responder_resources; 1662 event->param.conn.initiator_depth = rep_data->initiator_depth; 1663 event->param.conn.flow_control = rep_data->flow_control; 1664 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count; 1665 event->param.conn.srq = rep_data->srq; 1666 event->param.conn.qp_num = rep_data->remote_qpn; 1667 } 1668 1669 static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) 1670 { 1671 struct rdma_id_private *id_priv = cm_id->context; 1672 struct rdma_cm_event event; 1673 int ret = 0; 1674 1675 mutex_lock(&id_priv->handler_mutex); 1676 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT && 1677 id_priv->state != RDMA_CM_CONNECT) || 1678 (ib_event->event == IB_CM_TIMEWAIT_EXIT && 1679 id_priv->state != RDMA_CM_DISCONNECT)) 1680 goto out; 1681 1682 memset(&event, 0, sizeof event); 1683 switch (ib_event->event) { 1684 case IB_CM_REQ_ERROR: 1685 case IB_CM_REP_ERROR: 1686 event.event = RDMA_CM_EVENT_UNREACHABLE; 1687 event.status = -ETIMEDOUT; 1688 break; 1689 case IB_CM_REP_RECEIVED: 1690 if (id_priv->id.qp) { 1691 event.status = cma_rep_recv(id_priv); 1692 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR : 1693 RDMA_CM_EVENT_ESTABLISHED; 1694 } else { 1695 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE; 1696 } 1697 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd, 1698 ib_event->private_data); 1699 break; 1700 case IB_CM_RTU_RECEIVED: 1701 case IB_CM_USER_ESTABLISHED: 1702 event.event = RDMA_CM_EVENT_ESTABLISHED; 1703 break; 1704 case IB_CM_DREQ_ERROR: 1705 event.status = -ETIMEDOUT; /* fall through */ 1706 case IB_CM_DREQ_RECEIVED: 1707 case IB_CM_DREP_RECEIVED: 1708 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT, 1709 RDMA_CM_DISCONNECT)) 1710 goto out; 1711 event.event = RDMA_CM_EVENT_DISCONNECTED; 1712 break; 1713 case IB_CM_TIMEWAIT_EXIT: 1714 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT; 1715 break; 1716 case IB_CM_MRA_RECEIVED: 1717 /* ignore event */ 1718 goto out; 1719 case IB_CM_REJ_RECEIVED: 1720 cma_modify_qp_err(id_priv); 1721 event.status = ib_event->param.rej_rcvd.reason; 1722 event.event = RDMA_CM_EVENT_REJECTED; 1723 event.param.conn.private_data = ib_event->private_data; 1724 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE; 1725 break; 1726 default: 1727 pr_err("RDMA CMA: unexpected IB CM event: %d\n", 1728 ib_event->event); 1729 goto out; 1730 } 1731 1732 ret = id_priv->id.event_handler(&id_priv->id, &event); 1733 if (ret) { 1734 /* Destroy the CM ID by returning a non-zero value. */ 1735 id_priv->cm_id.ib = NULL; 1736 cma_exch(id_priv, RDMA_CM_DESTROYING); 1737 mutex_unlock(&id_priv->handler_mutex); 1738 rdma_destroy_id(&id_priv->id); 1739 return ret; 1740 } 1741 out: 1742 mutex_unlock(&id_priv->handler_mutex); 1743 return ret; 1744 } 1745 1746 static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id, 1747 struct ib_cm_event *ib_event, 1748 struct net_device *net_dev) 1749 { 1750 struct rdma_id_private *id_priv; 1751 struct rdma_cm_id *id; 1752 struct rdma_route *rt; 1753 const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family; 1754 const __be64 service_id = 1755 ib_event->param.req_rcvd.primary_path->service_id; 1756 int ret; 1757 1758 id = rdma_create_id(listen_id->route.addr.dev_addr.net, 1759 listen_id->event_handler, listen_id->context, 1760 listen_id->ps, ib_event->param.req_rcvd.qp_type); 1761 if (IS_ERR(id)) 1762 return NULL; 1763 1764 id_priv = container_of(id, struct rdma_id_private, id); 1765 if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr, 1766 (struct sockaddr *)&id->route.addr.dst_addr, 1767 listen_id, ib_event, ss_family, service_id)) 1768 goto err; 1769 1770 rt = &id->route; 1771 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1; 1772 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths, 1773 GFP_KERNEL); 1774 if (!rt->path_rec) 1775 goto err; 1776 1777 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path; 1778 if (rt->num_paths == 2) 1779 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path; 1780 1781 if (net_dev) { 1782 ret = rdma_copy_addr(&rt->addr.dev_addr, net_dev, NULL); 1783 if (ret) 1784 goto err; 1785 } else { 1786 if (!cma_protocol_roce(listen_id) && 1787 cma_any_addr(cma_src_addr(id_priv))) { 1788 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND; 1789 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid); 1790 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey)); 1791 } else if (!cma_any_addr(cma_src_addr(id_priv))) { 1792 ret = cma_translate_addr(cma_src_addr(id_priv), &rt->addr.dev_addr); 1793 if (ret) 1794 goto err; 1795 } 1796 } 1797 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid); 1798 1799 id_priv->state = RDMA_CM_CONNECT; 1800 return id_priv; 1801 1802 err: 1803 rdma_destroy_id(id); 1804 return NULL; 1805 } 1806 1807 static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id, 1808 struct ib_cm_event *ib_event, 1809 struct net_device *net_dev) 1810 { 1811 struct rdma_id_private *id_priv; 1812 struct rdma_cm_id *id; 1813 const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family; 1814 struct net *net = listen_id->route.addr.dev_addr.net; 1815 int ret; 1816 1817 id = rdma_create_id(net, listen_id->event_handler, listen_id->context, 1818 listen_id->ps, IB_QPT_UD); 1819 if (IS_ERR(id)) 1820 return NULL; 1821 1822 id_priv = container_of(id, struct rdma_id_private, id); 1823 if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr, 1824 (struct sockaddr *)&id->route.addr.dst_addr, 1825 listen_id, ib_event, ss_family, 1826 ib_event->param.sidr_req_rcvd.service_id)) 1827 goto err; 1828 1829 if (net_dev) { 1830 ret = rdma_copy_addr(&id->route.addr.dev_addr, net_dev, NULL); 1831 if (ret) 1832 goto err; 1833 } else { 1834 if (!cma_any_addr(cma_src_addr(id_priv))) { 1835 ret = cma_translate_addr(cma_src_addr(id_priv), 1836 &id->route.addr.dev_addr); 1837 if (ret) 1838 goto err; 1839 } 1840 } 1841 1842 id_priv->state = RDMA_CM_CONNECT; 1843 return id_priv; 1844 err: 1845 rdma_destroy_id(id); 1846 return NULL; 1847 } 1848 1849 static void cma_set_req_event_data(struct rdma_cm_event *event, 1850 struct ib_cm_req_event_param *req_data, 1851 void *private_data, int offset) 1852 { 1853 event->param.conn.private_data = private_data + offset; 1854 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset; 1855 event->param.conn.responder_resources = req_data->responder_resources; 1856 event->param.conn.initiator_depth = req_data->initiator_depth; 1857 event->param.conn.flow_control = req_data->flow_control; 1858 event->param.conn.retry_count = req_data->retry_count; 1859 event->param.conn.rnr_retry_count = req_data->rnr_retry_count; 1860 event->param.conn.srq = req_data->srq; 1861 event->param.conn.qp_num = req_data->remote_qpn; 1862 } 1863 1864 static int cma_check_req_qp_type(struct rdma_cm_id *id, struct ib_cm_event *ib_event) 1865 { 1866 return (((ib_event->event == IB_CM_REQ_RECEIVED) && 1867 (ib_event->param.req_rcvd.qp_type == id->qp_type)) || 1868 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) && 1869 (id->qp_type == IB_QPT_UD)) || 1870 (!id->qp_type)); 1871 } 1872 1873 static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) 1874 { 1875 struct rdma_id_private *listen_id, *conn_id = NULL; 1876 struct rdma_cm_event event; 1877 struct net_device *net_dev; 1878 int offset, ret; 1879 1880 listen_id = cma_id_from_event(cm_id, ib_event, &net_dev); 1881 if (IS_ERR(listen_id)) 1882 return PTR_ERR(listen_id); 1883 1884 if (!cma_check_req_qp_type(&listen_id->id, ib_event)) { 1885 ret = -EINVAL; 1886 goto net_dev_put; 1887 } 1888 1889 mutex_lock(&listen_id->handler_mutex); 1890 if (listen_id->state != RDMA_CM_LISTEN) { 1891 ret = -ECONNABORTED; 1892 goto err1; 1893 } 1894 1895 memset(&event, 0, sizeof event); 1896 offset = cma_user_data_offset(listen_id); 1897 event.event = RDMA_CM_EVENT_CONNECT_REQUEST; 1898 if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) { 1899 conn_id = cma_new_udp_id(&listen_id->id, ib_event, net_dev); 1900 event.param.ud.private_data = ib_event->private_data + offset; 1901 event.param.ud.private_data_len = 1902 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset; 1903 } else { 1904 conn_id = cma_new_conn_id(&listen_id->id, ib_event, net_dev); 1905 cma_set_req_event_data(&event, &ib_event->param.req_rcvd, 1906 ib_event->private_data, offset); 1907 } 1908 if (!conn_id) { 1909 ret = -ENOMEM; 1910 goto err1; 1911 } 1912 1913 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING); 1914 ret = cma_acquire_dev(conn_id, listen_id); 1915 if (ret) 1916 goto err2; 1917 1918 conn_id->cm_id.ib = cm_id; 1919 cm_id->context = conn_id; 1920 cm_id->cm_handler = cma_ib_handler; 1921 1922 /* 1923 * Protect against the user destroying conn_id from another thread 1924 * until we're done accessing it. 1925 */ 1926 atomic_inc(&conn_id->refcount); 1927 ret = conn_id->id.event_handler(&conn_id->id, &event); 1928 if (ret) 1929 goto err3; 1930 /* 1931 * Acquire mutex to prevent user executing rdma_destroy_id() 1932 * while we're accessing the cm_id. 1933 */ 1934 mutex_lock(&lock); 1935 if (cma_comp(conn_id, RDMA_CM_CONNECT) && 1936 (conn_id->id.qp_type != IB_QPT_UD)) 1937 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0); 1938 mutex_unlock(&lock); 1939 mutex_unlock(&conn_id->handler_mutex); 1940 mutex_unlock(&listen_id->handler_mutex); 1941 cma_deref_id(conn_id); 1942 if (net_dev) 1943 dev_put(net_dev); 1944 return 0; 1945 1946 err3: 1947 cma_deref_id(conn_id); 1948 /* Destroy the CM ID by returning a non-zero value. */ 1949 conn_id->cm_id.ib = NULL; 1950 err2: 1951 cma_exch(conn_id, RDMA_CM_DESTROYING); 1952 mutex_unlock(&conn_id->handler_mutex); 1953 err1: 1954 mutex_unlock(&listen_id->handler_mutex); 1955 if (conn_id) 1956 rdma_destroy_id(&conn_id->id); 1957 1958 net_dev_put: 1959 if (net_dev) 1960 dev_put(net_dev); 1961 1962 return ret; 1963 } 1964 1965 __be64 rdma_get_service_id(struct rdma_cm_id *id, struct sockaddr *addr) 1966 { 1967 if (addr->sa_family == AF_IB) 1968 return ((struct sockaddr_ib *) addr)->sib_sid; 1969 1970 return cpu_to_be64(((u64)id->ps << 16) + be16_to_cpu(cma_port(addr))); 1971 } 1972 EXPORT_SYMBOL(rdma_get_service_id); 1973 1974 static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event) 1975 { 1976 struct rdma_id_private *id_priv = iw_id->context; 1977 struct rdma_cm_event event; 1978 int ret = 0; 1979 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr; 1980 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr; 1981 1982 mutex_lock(&id_priv->handler_mutex); 1983 if (id_priv->state != RDMA_CM_CONNECT) 1984 goto out; 1985 1986 memset(&event, 0, sizeof event); 1987 switch (iw_event->event) { 1988 case IW_CM_EVENT_CLOSE: 1989 event.event = RDMA_CM_EVENT_DISCONNECTED; 1990 break; 1991 case IW_CM_EVENT_CONNECT_REPLY: 1992 memcpy(cma_src_addr(id_priv), laddr, 1993 rdma_addr_size(laddr)); 1994 memcpy(cma_dst_addr(id_priv), raddr, 1995 rdma_addr_size(raddr)); 1996 switch (iw_event->status) { 1997 case 0: 1998 event.event = RDMA_CM_EVENT_ESTABLISHED; 1999 event.param.conn.initiator_depth = iw_event->ird; 2000 event.param.conn.responder_resources = iw_event->ord; 2001 break; 2002 case -ECONNRESET: 2003 case -ECONNREFUSED: 2004 event.event = RDMA_CM_EVENT_REJECTED; 2005 break; 2006 case -ETIMEDOUT: 2007 event.event = RDMA_CM_EVENT_UNREACHABLE; 2008 break; 2009 default: 2010 event.event = RDMA_CM_EVENT_CONNECT_ERROR; 2011 break; 2012 } 2013 break; 2014 case IW_CM_EVENT_ESTABLISHED: 2015 event.event = RDMA_CM_EVENT_ESTABLISHED; 2016 event.param.conn.initiator_depth = iw_event->ird; 2017 event.param.conn.responder_resources = iw_event->ord; 2018 break; 2019 default: 2020 BUG_ON(1); 2021 } 2022 2023 event.status = iw_event->status; 2024 event.param.conn.private_data = iw_event->private_data; 2025 event.param.conn.private_data_len = iw_event->private_data_len; 2026 ret = id_priv->id.event_handler(&id_priv->id, &event); 2027 if (ret) { 2028 /* Destroy the CM ID by returning a non-zero value. */ 2029 id_priv->cm_id.iw = NULL; 2030 cma_exch(id_priv, RDMA_CM_DESTROYING); 2031 mutex_unlock(&id_priv->handler_mutex); 2032 rdma_destroy_id(&id_priv->id); 2033 return ret; 2034 } 2035 2036 out: 2037 mutex_unlock(&id_priv->handler_mutex); 2038 return ret; 2039 } 2040 2041 static int iw_conn_req_handler(struct iw_cm_id *cm_id, 2042 struct iw_cm_event *iw_event) 2043 { 2044 struct rdma_cm_id *new_cm_id; 2045 struct rdma_id_private *listen_id, *conn_id; 2046 struct rdma_cm_event event; 2047 int ret = -ECONNABORTED; 2048 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr; 2049 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr; 2050 2051 listen_id = cm_id->context; 2052 2053 mutex_lock(&listen_id->handler_mutex); 2054 if (listen_id->state != RDMA_CM_LISTEN) 2055 goto out; 2056 2057 /* Create a new RDMA id for the new IW CM ID */ 2058 new_cm_id = rdma_create_id(listen_id->id.route.addr.dev_addr.net, 2059 listen_id->id.event_handler, 2060 listen_id->id.context, 2061 RDMA_PS_TCP, IB_QPT_RC); 2062 if (IS_ERR(new_cm_id)) { 2063 ret = -ENOMEM; 2064 goto out; 2065 } 2066 conn_id = container_of(new_cm_id, struct rdma_id_private, id); 2067 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING); 2068 conn_id->state = RDMA_CM_CONNECT; 2069 2070 ret = rdma_translate_ip(laddr, &conn_id->id.route.addr.dev_addr, NULL); 2071 if (ret) { 2072 mutex_unlock(&conn_id->handler_mutex); 2073 rdma_destroy_id(new_cm_id); 2074 goto out; 2075 } 2076 2077 ret = cma_acquire_dev(conn_id, listen_id); 2078 if (ret) { 2079 mutex_unlock(&conn_id->handler_mutex); 2080 rdma_destroy_id(new_cm_id); 2081 goto out; 2082 } 2083 2084 conn_id->cm_id.iw = cm_id; 2085 cm_id->context = conn_id; 2086 cm_id->cm_handler = cma_iw_handler; 2087 2088 memcpy(cma_src_addr(conn_id), laddr, rdma_addr_size(laddr)); 2089 memcpy(cma_dst_addr(conn_id), raddr, rdma_addr_size(raddr)); 2090 2091 memset(&event, 0, sizeof event); 2092 event.event = RDMA_CM_EVENT_CONNECT_REQUEST; 2093 event.param.conn.private_data = iw_event->private_data; 2094 event.param.conn.private_data_len = iw_event->private_data_len; 2095 event.param.conn.initiator_depth = iw_event->ird; 2096 event.param.conn.responder_resources = iw_event->ord; 2097 2098 /* 2099 * Protect against the user destroying conn_id from another thread 2100 * until we're done accessing it. 2101 */ 2102 atomic_inc(&conn_id->refcount); 2103 ret = conn_id->id.event_handler(&conn_id->id, &event); 2104 if (ret) { 2105 /* User wants to destroy the CM ID */ 2106 conn_id->cm_id.iw = NULL; 2107 cma_exch(conn_id, RDMA_CM_DESTROYING); 2108 mutex_unlock(&conn_id->handler_mutex); 2109 cma_deref_id(conn_id); 2110 rdma_destroy_id(&conn_id->id); 2111 goto out; 2112 } 2113 2114 mutex_unlock(&conn_id->handler_mutex); 2115 cma_deref_id(conn_id); 2116 2117 out: 2118 mutex_unlock(&listen_id->handler_mutex); 2119 return ret; 2120 } 2121 2122 static int cma_ib_listen(struct rdma_id_private *id_priv) 2123 { 2124 struct sockaddr *addr; 2125 struct ib_cm_id *id; 2126 __be64 svc_id; 2127 2128 addr = cma_src_addr(id_priv); 2129 svc_id = rdma_get_service_id(&id_priv->id, addr); 2130 id = ib_cm_insert_listen(id_priv->id.device, cma_req_handler, svc_id); 2131 if (IS_ERR(id)) 2132 return PTR_ERR(id); 2133 id_priv->cm_id.ib = id; 2134 2135 return 0; 2136 } 2137 2138 static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog) 2139 { 2140 int ret; 2141 struct iw_cm_id *id; 2142 2143 id = iw_create_cm_id(id_priv->id.device, 2144 iw_conn_req_handler, 2145 id_priv); 2146 if (IS_ERR(id)) 2147 return PTR_ERR(id); 2148 2149 id->tos = id_priv->tos; 2150 id_priv->cm_id.iw = id; 2151 2152 memcpy(&id_priv->cm_id.iw->local_addr, cma_src_addr(id_priv), 2153 rdma_addr_size(cma_src_addr(id_priv))); 2154 2155 ret = iw_cm_listen(id_priv->cm_id.iw, backlog); 2156 2157 if (ret) { 2158 iw_destroy_cm_id(id_priv->cm_id.iw); 2159 id_priv->cm_id.iw = NULL; 2160 } 2161 2162 return ret; 2163 } 2164 2165 static int cma_listen_handler(struct rdma_cm_id *id, 2166 struct rdma_cm_event *event) 2167 { 2168 struct rdma_id_private *id_priv = id->context; 2169 2170 id->context = id_priv->id.context; 2171 id->event_handler = id_priv->id.event_handler; 2172 return id_priv->id.event_handler(id, event); 2173 } 2174 2175 static void cma_listen_on_dev(struct rdma_id_private *id_priv, 2176 struct cma_device *cma_dev) 2177 { 2178 struct rdma_id_private *dev_id_priv; 2179 struct rdma_cm_id *id; 2180 struct net *net = id_priv->id.route.addr.dev_addr.net; 2181 int ret; 2182 2183 if (cma_family(id_priv) == AF_IB && !rdma_cap_ib_cm(cma_dev->device, 1)) 2184 return; 2185 2186 id = rdma_create_id(net, cma_listen_handler, id_priv, id_priv->id.ps, 2187 id_priv->id.qp_type); 2188 if (IS_ERR(id)) 2189 return; 2190 2191 dev_id_priv = container_of(id, struct rdma_id_private, id); 2192 2193 dev_id_priv->state = RDMA_CM_ADDR_BOUND; 2194 memcpy(cma_src_addr(dev_id_priv), cma_src_addr(id_priv), 2195 rdma_addr_size(cma_src_addr(id_priv))); 2196 2197 _cma_attach_to_dev(dev_id_priv, cma_dev); 2198 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list); 2199 atomic_inc(&id_priv->refcount); 2200 dev_id_priv->internal_id = 1; 2201 dev_id_priv->afonly = id_priv->afonly; 2202 2203 ret = rdma_listen(id, id_priv->backlog); 2204 if (ret) 2205 pr_warn("RDMA CMA: cma_listen_on_dev, error %d, listening on device %s\n", 2206 ret, cma_dev->device->name); 2207 } 2208 2209 static void cma_listen_on_all(struct rdma_id_private *id_priv) 2210 { 2211 struct cma_device *cma_dev; 2212 2213 mutex_lock(&lock); 2214 list_add_tail(&id_priv->list, &listen_any_list); 2215 list_for_each_entry(cma_dev, &dev_list, list) 2216 cma_listen_on_dev(id_priv, cma_dev); 2217 mutex_unlock(&lock); 2218 } 2219 2220 void rdma_set_service_type(struct rdma_cm_id *id, int tos) 2221 { 2222 struct rdma_id_private *id_priv; 2223 2224 id_priv = container_of(id, struct rdma_id_private, id); 2225 id_priv->tos = (u8) tos; 2226 } 2227 EXPORT_SYMBOL(rdma_set_service_type); 2228 2229 static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec, 2230 void *context) 2231 { 2232 struct cma_work *work = context; 2233 struct rdma_route *route; 2234 2235 route = &work->id->id.route; 2236 2237 if (!status) { 2238 route->num_paths = 1; 2239 *route->path_rec = *path_rec; 2240 } else { 2241 work->old_state = RDMA_CM_ROUTE_QUERY; 2242 work->new_state = RDMA_CM_ADDR_RESOLVED; 2243 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR; 2244 work->event.status = status; 2245 } 2246 2247 queue_work(cma_wq, &work->work); 2248 } 2249 2250 static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms, 2251 struct cma_work *work) 2252 { 2253 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 2254 struct ib_sa_path_rec path_rec; 2255 ib_sa_comp_mask comp_mask; 2256 struct sockaddr_in6 *sin6; 2257 struct sockaddr_ib *sib; 2258 2259 memset(&path_rec, 0, sizeof path_rec); 2260 rdma_addr_get_sgid(dev_addr, &path_rec.sgid); 2261 rdma_addr_get_dgid(dev_addr, &path_rec.dgid); 2262 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); 2263 path_rec.numb_path = 1; 2264 path_rec.reversible = 1; 2265 path_rec.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv)); 2266 2267 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID | 2268 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH | 2269 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID; 2270 2271 switch (cma_family(id_priv)) { 2272 case AF_INET: 2273 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos); 2274 comp_mask |= IB_SA_PATH_REC_QOS_CLASS; 2275 break; 2276 case AF_INET6: 2277 sin6 = (struct sockaddr_in6 *) cma_src_addr(id_priv); 2278 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20); 2279 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS; 2280 break; 2281 case AF_IB: 2282 sib = (struct sockaddr_ib *) cma_src_addr(id_priv); 2283 path_rec.traffic_class = (u8) (be32_to_cpu(sib->sib_flowinfo) >> 20); 2284 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS; 2285 break; 2286 } 2287 2288 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device, 2289 id_priv->id.port_num, &path_rec, 2290 comp_mask, timeout_ms, 2291 GFP_KERNEL, cma_query_handler, 2292 work, &id_priv->query); 2293 2294 return (id_priv->query_id < 0) ? id_priv->query_id : 0; 2295 } 2296 2297 static void cma_work_handler(struct work_struct *_work) 2298 { 2299 struct cma_work *work = container_of(_work, struct cma_work, work); 2300 struct rdma_id_private *id_priv = work->id; 2301 int destroy = 0; 2302 2303 mutex_lock(&id_priv->handler_mutex); 2304 if (!cma_comp_exch(id_priv, work->old_state, work->new_state)) 2305 goto out; 2306 2307 if (id_priv->id.event_handler(&id_priv->id, &work->event)) { 2308 cma_exch(id_priv, RDMA_CM_DESTROYING); 2309 destroy = 1; 2310 } 2311 out: 2312 mutex_unlock(&id_priv->handler_mutex); 2313 cma_deref_id(id_priv); 2314 if (destroy) 2315 rdma_destroy_id(&id_priv->id); 2316 kfree(work); 2317 } 2318 2319 static void cma_ndev_work_handler(struct work_struct *_work) 2320 { 2321 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work); 2322 struct rdma_id_private *id_priv = work->id; 2323 int destroy = 0; 2324 2325 mutex_lock(&id_priv->handler_mutex); 2326 if (id_priv->state == RDMA_CM_DESTROYING || 2327 id_priv->state == RDMA_CM_DEVICE_REMOVAL) 2328 goto out; 2329 2330 if (id_priv->id.event_handler(&id_priv->id, &work->event)) { 2331 cma_exch(id_priv, RDMA_CM_DESTROYING); 2332 destroy = 1; 2333 } 2334 2335 out: 2336 mutex_unlock(&id_priv->handler_mutex); 2337 cma_deref_id(id_priv); 2338 if (destroy) 2339 rdma_destroy_id(&id_priv->id); 2340 kfree(work); 2341 } 2342 2343 static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms) 2344 { 2345 struct rdma_route *route = &id_priv->id.route; 2346 struct cma_work *work; 2347 int ret; 2348 2349 work = kzalloc(sizeof *work, GFP_KERNEL); 2350 if (!work) 2351 return -ENOMEM; 2352 2353 work->id = id_priv; 2354 INIT_WORK(&work->work, cma_work_handler); 2355 work->old_state = RDMA_CM_ROUTE_QUERY; 2356 work->new_state = RDMA_CM_ROUTE_RESOLVED; 2357 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 2358 2359 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL); 2360 if (!route->path_rec) { 2361 ret = -ENOMEM; 2362 goto err1; 2363 } 2364 2365 ret = cma_query_ib_route(id_priv, timeout_ms, work); 2366 if (ret) 2367 goto err2; 2368 2369 return 0; 2370 err2: 2371 kfree(route->path_rec); 2372 route->path_rec = NULL; 2373 err1: 2374 kfree(work); 2375 return ret; 2376 } 2377 2378 int rdma_set_ib_paths(struct rdma_cm_id *id, 2379 struct ib_sa_path_rec *path_rec, int num_paths) 2380 { 2381 struct rdma_id_private *id_priv; 2382 int ret; 2383 2384 id_priv = container_of(id, struct rdma_id_private, id); 2385 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, 2386 RDMA_CM_ROUTE_RESOLVED)) 2387 return -EINVAL; 2388 2389 id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths, 2390 GFP_KERNEL); 2391 if (!id->route.path_rec) { 2392 ret = -ENOMEM; 2393 goto err; 2394 } 2395 2396 id->route.num_paths = num_paths; 2397 return 0; 2398 err: 2399 cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED); 2400 return ret; 2401 } 2402 EXPORT_SYMBOL(rdma_set_ib_paths); 2403 2404 static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms) 2405 { 2406 struct cma_work *work; 2407 2408 work = kzalloc(sizeof *work, GFP_KERNEL); 2409 if (!work) 2410 return -ENOMEM; 2411 2412 work->id = id_priv; 2413 INIT_WORK(&work->work, cma_work_handler); 2414 work->old_state = RDMA_CM_ROUTE_QUERY; 2415 work->new_state = RDMA_CM_ROUTE_RESOLVED; 2416 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 2417 queue_work(cma_wq, &work->work); 2418 return 0; 2419 } 2420 2421 static int iboe_tos_to_sl(struct net_device *ndev, int tos) 2422 { 2423 int prio; 2424 struct net_device *dev; 2425 2426 prio = rt_tos2priority(tos); 2427 dev = ndev->priv_flags & IFF_802_1Q_VLAN ? 2428 vlan_dev_real_dev(ndev) : ndev; 2429 2430 if (dev->num_tc) 2431 return netdev_get_prio_tc_map(dev, prio); 2432 2433 #if IS_ENABLED(CONFIG_VLAN_8021Q) 2434 if (ndev->priv_flags & IFF_802_1Q_VLAN) 2435 return (vlan_dev_get_egress_qos_mask(ndev, prio) & 2436 VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT; 2437 #endif 2438 return 0; 2439 } 2440 2441 static int cma_resolve_iboe_route(struct rdma_id_private *id_priv) 2442 { 2443 struct rdma_route *route = &id_priv->id.route; 2444 struct rdma_addr *addr = &route->addr; 2445 struct cma_work *work; 2446 int ret; 2447 struct net_device *ndev = NULL; 2448 2449 2450 work = kzalloc(sizeof *work, GFP_KERNEL); 2451 if (!work) 2452 return -ENOMEM; 2453 2454 work->id = id_priv; 2455 INIT_WORK(&work->work, cma_work_handler); 2456 2457 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL); 2458 if (!route->path_rec) { 2459 ret = -ENOMEM; 2460 goto err1; 2461 } 2462 2463 route->num_paths = 1; 2464 2465 if (addr->dev_addr.bound_dev_if) { 2466 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if); 2467 if (!ndev) { 2468 ret = -ENODEV; 2469 goto err2; 2470 } 2471 2472 if (ndev->flags & IFF_LOOPBACK) { 2473 dev_put(ndev); 2474 if (!id_priv->id.device->get_netdev) { 2475 ret = -EOPNOTSUPP; 2476 goto err2; 2477 } 2478 2479 ndev = id_priv->id.device->get_netdev(id_priv->id.device, 2480 id_priv->id.port_num); 2481 if (!ndev) { 2482 ret = -ENODEV; 2483 goto err2; 2484 } 2485 } 2486 2487 route->path_rec->net = &init_net; 2488 route->path_rec->ifindex = ndev->ifindex; 2489 route->path_rec->gid_type = id_priv->gid_type; 2490 } 2491 if (!ndev) { 2492 ret = -ENODEV; 2493 goto err2; 2494 } 2495 2496 memcpy(route->path_rec->dmac, addr->dev_addr.dst_dev_addr, ETH_ALEN); 2497 2498 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr, 2499 &route->path_rec->sgid); 2500 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.dst_addr, 2501 &route->path_rec->dgid); 2502 2503 /* Use the hint from IP Stack to select GID Type */ 2504 if (route->path_rec->gid_type < ib_network_to_gid_type(addr->dev_addr.network)) 2505 route->path_rec->gid_type = ib_network_to_gid_type(addr->dev_addr.network); 2506 if (((struct sockaddr *)&id_priv->id.route.addr.dst_addr)->sa_family != AF_IB) 2507 /* TODO: get the hoplimit from the inet/inet6 device */ 2508 route->path_rec->hop_limit = addr->dev_addr.hoplimit; 2509 else 2510 route->path_rec->hop_limit = 1; 2511 route->path_rec->reversible = 1; 2512 route->path_rec->pkey = cpu_to_be16(0xffff); 2513 route->path_rec->mtu_selector = IB_SA_EQ; 2514 route->path_rec->sl = iboe_tos_to_sl(ndev, id_priv->tos); 2515 route->path_rec->mtu = iboe_get_mtu(ndev->mtu); 2516 route->path_rec->rate_selector = IB_SA_EQ; 2517 route->path_rec->rate = iboe_get_rate(ndev); 2518 dev_put(ndev); 2519 route->path_rec->packet_life_time_selector = IB_SA_EQ; 2520 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME; 2521 if (!route->path_rec->mtu) { 2522 ret = -EINVAL; 2523 goto err2; 2524 } 2525 2526 work->old_state = RDMA_CM_ROUTE_QUERY; 2527 work->new_state = RDMA_CM_ROUTE_RESOLVED; 2528 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 2529 work->event.status = 0; 2530 2531 queue_work(cma_wq, &work->work); 2532 2533 return 0; 2534 2535 err2: 2536 kfree(route->path_rec); 2537 route->path_rec = NULL; 2538 err1: 2539 kfree(work); 2540 return ret; 2541 } 2542 2543 int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms) 2544 { 2545 struct rdma_id_private *id_priv; 2546 int ret; 2547 2548 id_priv = container_of(id, struct rdma_id_private, id); 2549 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY)) 2550 return -EINVAL; 2551 2552 atomic_inc(&id_priv->refcount); 2553 if (rdma_cap_ib_sa(id->device, id->port_num)) 2554 ret = cma_resolve_ib_route(id_priv, timeout_ms); 2555 else if (rdma_protocol_roce(id->device, id->port_num)) 2556 ret = cma_resolve_iboe_route(id_priv); 2557 else if (rdma_protocol_iwarp(id->device, id->port_num)) 2558 ret = cma_resolve_iw_route(id_priv, timeout_ms); 2559 else 2560 ret = -ENOSYS; 2561 2562 if (ret) 2563 goto err; 2564 2565 return 0; 2566 err: 2567 cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED); 2568 cma_deref_id(id_priv); 2569 return ret; 2570 } 2571 EXPORT_SYMBOL(rdma_resolve_route); 2572 2573 static void cma_set_loopback(struct sockaddr *addr) 2574 { 2575 switch (addr->sa_family) { 2576 case AF_INET: 2577 ((struct sockaddr_in *) addr)->sin_addr.s_addr = htonl(INADDR_LOOPBACK); 2578 break; 2579 case AF_INET6: 2580 ipv6_addr_set(&((struct sockaddr_in6 *) addr)->sin6_addr, 2581 0, 0, 0, htonl(1)); 2582 break; 2583 default: 2584 ib_addr_set(&((struct sockaddr_ib *) addr)->sib_addr, 2585 0, 0, 0, htonl(1)); 2586 break; 2587 } 2588 } 2589 2590 static int cma_bind_loopback(struct rdma_id_private *id_priv) 2591 { 2592 struct cma_device *cma_dev, *cur_dev; 2593 struct ib_port_attr port_attr; 2594 union ib_gid gid; 2595 u16 pkey; 2596 int ret; 2597 u8 p; 2598 2599 cma_dev = NULL; 2600 mutex_lock(&lock); 2601 list_for_each_entry(cur_dev, &dev_list, list) { 2602 if (cma_family(id_priv) == AF_IB && 2603 !rdma_cap_ib_cm(cur_dev->device, 1)) 2604 continue; 2605 2606 if (!cma_dev) 2607 cma_dev = cur_dev; 2608 2609 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) { 2610 if (!ib_query_port(cur_dev->device, p, &port_attr) && 2611 port_attr.state == IB_PORT_ACTIVE) { 2612 cma_dev = cur_dev; 2613 goto port_found; 2614 } 2615 } 2616 } 2617 2618 if (!cma_dev) { 2619 ret = -ENODEV; 2620 goto out; 2621 } 2622 2623 p = 1; 2624 2625 port_found: 2626 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid, NULL); 2627 if (ret) 2628 goto out; 2629 2630 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey); 2631 if (ret) 2632 goto out; 2633 2634 id_priv->id.route.addr.dev_addr.dev_type = 2635 (rdma_protocol_ib(cma_dev->device, p)) ? 2636 ARPHRD_INFINIBAND : ARPHRD_ETHER; 2637 2638 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid); 2639 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey); 2640 id_priv->id.port_num = p; 2641 cma_attach_to_dev(id_priv, cma_dev); 2642 cma_set_loopback(cma_src_addr(id_priv)); 2643 out: 2644 mutex_unlock(&lock); 2645 return ret; 2646 } 2647 2648 static void addr_handler(int status, struct sockaddr *src_addr, 2649 struct rdma_dev_addr *dev_addr, void *context) 2650 { 2651 struct rdma_id_private *id_priv = context; 2652 struct rdma_cm_event event; 2653 2654 memset(&event, 0, sizeof event); 2655 mutex_lock(&id_priv->handler_mutex); 2656 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, 2657 RDMA_CM_ADDR_RESOLVED)) 2658 goto out; 2659 2660 memcpy(cma_src_addr(id_priv), src_addr, rdma_addr_size(src_addr)); 2661 if (!status && !id_priv->cma_dev) 2662 status = cma_acquire_dev(id_priv, NULL); 2663 2664 if (status) { 2665 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, 2666 RDMA_CM_ADDR_BOUND)) 2667 goto out; 2668 event.event = RDMA_CM_EVENT_ADDR_ERROR; 2669 event.status = status; 2670 } else 2671 event.event = RDMA_CM_EVENT_ADDR_RESOLVED; 2672 2673 if (id_priv->id.event_handler(&id_priv->id, &event)) { 2674 cma_exch(id_priv, RDMA_CM_DESTROYING); 2675 mutex_unlock(&id_priv->handler_mutex); 2676 cma_deref_id(id_priv); 2677 rdma_destroy_id(&id_priv->id); 2678 return; 2679 } 2680 out: 2681 mutex_unlock(&id_priv->handler_mutex); 2682 cma_deref_id(id_priv); 2683 } 2684 2685 static int cma_resolve_loopback(struct rdma_id_private *id_priv) 2686 { 2687 struct cma_work *work; 2688 union ib_gid gid; 2689 int ret; 2690 2691 work = kzalloc(sizeof *work, GFP_KERNEL); 2692 if (!work) 2693 return -ENOMEM; 2694 2695 if (!id_priv->cma_dev) { 2696 ret = cma_bind_loopback(id_priv); 2697 if (ret) 2698 goto err; 2699 } 2700 2701 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid); 2702 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid); 2703 2704 work->id = id_priv; 2705 INIT_WORK(&work->work, cma_work_handler); 2706 work->old_state = RDMA_CM_ADDR_QUERY; 2707 work->new_state = RDMA_CM_ADDR_RESOLVED; 2708 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED; 2709 queue_work(cma_wq, &work->work); 2710 return 0; 2711 err: 2712 kfree(work); 2713 return ret; 2714 } 2715 2716 static int cma_resolve_ib_addr(struct rdma_id_private *id_priv) 2717 { 2718 struct cma_work *work; 2719 int ret; 2720 2721 work = kzalloc(sizeof *work, GFP_KERNEL); 2722 if (!work) 2723 return -ENOMEM; 2724 2725 if (!id_priv->cma_dev) { 2726 ret = cma_resolve_ib_dev(id_priv); 2727 if (ret) 2728 goto err; 2729 } 2730 2731 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, (union ib_gid *) 2732 &(((struct sockaddr_ib *) &id_priv->id.route.addr.dst_addr)->sib_addr)); 2733 2734 work->id = id_priv; 2735 INIT_WORK(&work->work, cma_work_handler); 2736 work->old_state = RDMA_CM_ADDR_QUERY; 2737 work->new_state = RDMA_CM_ADDR_RESOLVED; 2738 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED; 2739 queue_work(cma_wq, &work->work); 2740 return 0; 2741 err: 2742 kfree(work); 2743 return ret; 2744 } 2745 2746 static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, 2747 struct sockaddr *dst_addr) 2748 { 2749 if (!src_addr || !src_addr->sa_family) { 2750 src_addr = (struct sockaddr *) &id->route.addr.src_addr; 2751 src_addr->sa_family = dst_addr->sa_family; 2752 if (dst_addr->sa_family == AF_INET6) { 2753 struct sockaddr_in6 *src_addr6 = (struct sockaddr_in6 *) src_addr; 2754 struct sockaddr_in6 *dst_addr6 = (struct sockaddr_in6 *) dst_addr; 2755 src_addr6->sin6_scope_id = dst_addr6->sin6_scope_id; 2756 if (ipv6_addr_type(&dst_addr6->sin6_addr) & IPV6_ADDR_LINKLOCAL) 2757 id->route.addr.dev_addr.bound_dev_if = dst_addr6->sin6_scope_id; 2758 } else if (dst_addr->sa_family == AF_IB) { 2759 ((struct sockaddr_ib *) src_addr)->sib_pkey = 2760 ((struct sockaddr_ib *) dst_addr)->sib_pkey; 2761 } 2762 } 2763 return rdma_bind_addr(id, src_addr); 2764 } 2765 2766 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, 2767 struct sockaddr *dst_addr, int timeout_ms) 2768 { 2769 struct rdma_id_private *id_priv; 2770 int ret; 2771 2772 id_priv = container_of(id, struct rdma_id_private, id); 2773 if (id_priv->state == RDMA_CM_IDLE) { 2774 ret = cma_bind_addr(id, src_addr, dst_addr); 2775 if (ret) 2776 return ret; 2777 } 2778 2779 if (cma_family(id_priv) != dst_addr->sa_family) 2780 return -EINVAL; 2781 2782 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY)) 2783 return -EINVAL; 2784 2785 atomic_inc(&id_priv->refcount); 2786 memcpy(cma_dst_addr(id_priv), dst_addr, rdma_addr_size(dst_addr)); 2787 if (cma_any_addr(dst_addr)) { 2788 ret = cma_resolve_loopback(id_priv); 2789 } else { 2790 if (dst_addr->sa_family == AF_IB) { 2791 ret = cma_resolve_ib_addr(id_priv); 2792 } else { 2793 ret = rdma_resolve_ip(&addr_client, cma_src_addr(id_priv), 2794 dst_addr, &id->route.addr.dev_addr, 2795 timeout_ms, addr_handler, id_priv); 2796 } 2797 } 2798 if (ret) 2799 goto err; 2800 2801 return 0; 2802 err: 2803 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND); 2804 cma_deref_id(id_priv); 2805 return ret; 2806 } 2807 EXPORT_SYMBOL(rdma_resolve_addr); 2808 2809 int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse) 2810 { 2811 struct rdma_id_private *id_priv; 2812 unsigned long flags; 2813 int ret; 2814 2815 id_priv = container_of(id, struct rdma_id_private, id); 2816 spin_lock_irqsave(&id_priv->lock, flags); 2817 if (reuse || id_priv->state == RDMA_CM_IDLE) { 2818 id_priv->reuseaddr = reuse; 2819 ret = 0; 2820 } else { 2821 ret = -EINVAL; 2822 } 2823 spin_unlock_irqrestore(&id_priv->lock, flags); 2824 return ret; 2825 } 2826 EXPORT_SYMBOL(rdma_set_reuseaddr); 2827 2828 int rdma_set_afonly(struct rdma_cm_id *id, int afonly) 2829 { 2830 struct rdma_id_private *id_priv; 2831 unsigned long flags; 2832 int ret; 2833 2834 id_priv = container_of(id, struct rdma_id_private, id); 2835 spin_lock_irqsave(&id_priv->lock, flags); 2836 if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) { 2837 id_priv->options |= (1 << CMA_OPTION_AFONLY); 2838 id_priv->afonly = afonly; 2839 ret = 0; 2840 } else { 2841 ret = -EINVAL; 2842 } 2843 spin_unlock_irqrestore(&id_priv->lock, flags); 2844 return ret; 2845 } 2846 EXPORT_SYMBOL(rdma_set_afonly); 2847 2848 static void cma_bind_port(struct rdma_bind_list *bind_list, 2849 struct rdma_id_private *id_priv) 2850 { 2851 struct sockaddr *addr; 2852 struct sockaddr_ib *sib; 2853 u64 sid, mask; 2854 __be16 port; 2855 2856 addr = cma_src_addr(id_priv); 2857 port = htons(bind_list->port); 2858 2859 switch (addr->sa_family) { 2860 case AF_INET: 2861 ((struct sockaddr_in *) addr)->sin_port = port; 2862 break; 2863 case AF_INET6: 2864 ((struct sockaddr_in6 *) addr)->sin6_port = port; 2865 break; 2866 case AF_IB: 2867 sib = (struct sockaddr_ib *) addr; 2868 sid = be64_to_cpu(sib->sib_sid); 2869 mask = be64_to_cpu(sib->sib_sid_mask); 2870 sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port)); 2871 sib->sib_sid_mask = cpu_to_be64(~0ULL); 2872 break; 2873 } 2874 id_priv->bind_list = bind_list; 2875 hlist_add_head(&id_priv->node, &bind_list->owners); 2876 } 2877 2878 static int cma_alloc_port(enum rdma_port_space ps, 2879 struct rdma_id_private *id_priv, unsigned short snum) 2880 { 2881 struct rdma_bind_list *bind_list; 2882 int ret; 2883 2884 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL); 2885 if (!bind_list) 2886 return -ENOMEM; 2887 2888 ret = cma_ps_alloc(id_priv->id.route.addr.dev_addr.net, ps, bind_list, 2889 snum); 2890 if (ret < 0) 2891 goto err; 2892 2893 bind_list->ps = ps; 2894 bind_list->port = (unsigned short)ret; 2895 cma_bind_port(bind_list, id_priv); 2896 return 0; 2897 err: 2898 kfree(bind_list); 2899 return ret == -ENOSPC ? -EADDRNOTAVAIL : ret; 2900 } 2901 2902 static int cma_alloc_any_port(enum rdma_port_space ps, 2903 struct rdma_id_private *id_priv) 2904 { 2905 static unsigned int last_used_port; 2906 int low, high, remaining; 2907 unsigned int rover; 2908 struct net *net = id_priv->id.route.addr.dev_addr.net; 2909 2910 inet_get_local_port_range(net, &low, &high); 2911 remaining = (high - low) + 1; 2912 rover = prandom_u32() % remaining + low; 2913 retry: 2914 if (last_used_port != rover && 2915 !cma_ps_find(net, ps, (unsigned short)rover)) { 2916 int ret = cma_alloc_port(ps, id_priv, rover); 2917 /* 2918 * Remember previously used port number in order to avoid 2919 * re-using same port immediately after it is closed. 2920 */ 2921 if (!ret) 2922 last_used_port = rover; 2923 if (ret != -EADDRNOTAVAIL) 2924 return ret; 2925 } 2926 if (--remaining) { 2927 rover++; 2928 if ((rover < low) || (rover > high)) 2929 rover = low; 2930 goto retry; 2931 } 2932 return -EADDRNOTAVAIL; 2933 } 2934 2935 /* 2936 * Check that the requested port is available. This is called when trying to 2937 * bind to a specific port, or when trying to listen on a bound port. In 2938 * the latter case, the provided id_priv may already be on the bind_list, but 2939 * we still need to check that it's okay to start listening. 2940 */ 2941 static int cma_check_port(struct rdma_bind_list *bind_list, 2942 struct rdma_id_private *id_priv, uint8_t reuseaddr) 2943 { 2944 struct rdma_id_private *cur_id; 2945 struct sockaddr *addr, *cur_addr; 2946 2947 addr = cma_src_addr(id_priv); 2948 hlist_for_each_entry(cur_id, &bind_list->owners, node) { 2949 if (id_priv == cur_id) 2950 continue; 2951 2952 if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr && 2953 cur_id->reuseaddr) 2954 continue; 2955 2956 cur_addr = cma_src_addr(cur_id); 2957 if (id_priv->afonly && cur_id->afonly && 2958 (addr->sa_family != cur_addr->sa_family)) 2959 continue; 2960 2961 if (cma_any_addr(addr) || cma_any_addr(cur_addr)) 2962 return -EADDRNOTAVAIL; 2963 2964 if (!cma_addr_cmp(addr, cur_addr)) 2965 return -EADDRINUSE; 2966 } 2967 return 0; 2968 } 2969 2970 static int cma_use_port(enum rdma_port_space ps, 2971 struct rdma_id_private *id_priv) 2972 { 2973 struct rdma_bind_list *bind_list; 2974 unsigned short snum; 2975 int ret; 2976 2977 snum = ntohs(cma_port(cma_src_addr(id_priv))); 2978 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE)) 2979 return -EACCES; 2980 2981 bind_list = cma_ps_find(id_priv->id.route.addr.dev_addr.net, ps, snum); 2982 if (!bind_list) { 2983 ret = cma_alloc_port(ps, id_priv, snum); 2984 } else { 2985 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr); 2986 if (!ret) 2987 cma_bind_port(bind_list, id_priv); 2988 } 2989 return ret; 2990 } 2991 2992 static int cma_bind_listen(struct rdma_id_private *id_priv) 2993 { 2994 struct rdma_bind_list *bind_list = id_priv->bind_list; 2995 int ret = 0; 2996 2997 mutex_lock(&lock); 2998 if (bind_list->owners.first->next) 2999 ret = cma_check_port(bind_list, id_priv, 0); 3000 mutex_unlock(&lock); 3001 return ret; 3002 } 3003 3004 static enum rdma_port_space cma_select_inet_ps( 3005 struct rdma_id_private *id_priv) 3006 { 3007 switch (id_priv->id.ps) { 3008 case RDMA_PS_TCP: 3009 case RDMA_PS_UDP: 3010 case RDMA_PS_IPOIB: 3011 case RDMA_PS_IB: 3012 return id_priv->id.ps; 3013 default: 3014 3015 return 0; 3016 } 3017 } 3018 3019 static enum rdma_port_space cma_select_ib_ps(struct rdma_id_private *id_priv) 3020 { 3021 enum rdma_port_space ps = 0; 3022 struct sockaddr_ib *sib; 3023 u64 sid_ps, mask, sid; 3024 3025 sib = (struct sockaddr_ib *) cma_src_addr(id_priv); 3026 mask = be64_to_cpu(sib->sib_sid_mask) & RDMA_IB_IP_PS_MASK; 3027 sid = be64_to_cpu(sib->sib_sid) & mask; 3028 3029 if ((id_priv->id.ps == RDMA_PS_IB) && (sid == (RDMA_IB_IP_PS_IB & mask))) { 3030 sid_ps = RDMA_IB_IP_PS_IB; 3031 ps = RDMA_PS_IB; 3032 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_TCP)) && 3033 (sid == (RDMA_IB_IP_PS_TCP & mask))) { 3034 sid_ps = RDMA_IB_IP_PS_TCP; 3035 ps = RDMA_PS_TCP; 3036 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_UDP)) && 3037 (sid == (RDMA_IB_IP_PS_UDP & mask))) { 3038 sid_ps = RDMA_IB_IP_PS_UDP; 3039 ps = RDMA_PS_UDP; 3040 } 3041 3042 if (ps) { 3043 sib->sib_sid = cpu_to_be64(sid_ps | ntohs(cma_port((struct sockaddr *) sib))); 3044 sib->sib_sid_mask = cpu_to_be64(RDMA_IB_IP_PS_MASK | 3045 be64_to_cpu(sib->sib_sid_mask)); 3046 } 3047 return ps; 3048 } 3049 3050 static int cma_get_port(struct rdma_id_private *id_priv) 3051 { 3052 enum rdma_port_space ps; 3053 int ret; 3054 3055 if (cma_family(id_priv) != AF_IB) 3056 ps = cma_select_inet_ps(id_priv); 3057 else 3058 ps = cma_select_ib_ps(id_priv); 3059 if (!ps) 3060 return -EPROTONOSUPPORT; 3061 3062 mutex_lock(&lock); 3063 if (cma_any_port(cma_src_addr(id_priv))) 3064 ret = cma_alloc_any_port(ps, id_priv); 3065 else 3066 ret = cma_use_port(ps, id_priv); 3067 mutex_unlock(&lock); 3068 3069 return ret; 3070 } 3071 3072 static int cma_check_linklocal(struct rdma_dev_addr *dev_addr, 3073 struct sockaddr *addr) 3074 { 3075 #if IS_ENABLED(CONFIG_IPV6) 3076 struct sockaddr_in6 *sin6; 3077 3078 if (addr->sa_family != AF_INET6) 3079 return 0; 3080 3081 sin6 = (struct sockaddr_in6 *) addr; 3082 3083 if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)) 3084 return 0; 3085 3086 if (!sin6->sin6_scope_id) 3087 return -EINVAL; 3088 3089 dev_addr->bound_dev_if = sin6->sin6_scope_id; 3090 #endif 3091 return 0; 3092 } 3093 3094 int rdma_listen(struct rdma_cm_id *id, int backlog) 3095 { 3096 struct rdma_id_private *id_priv; 3097 int ret; 3098 3099 id_priv = container_of(id, struct rdma_id_private, id); 3100 if (id_priv->state == RDMA_CM_IDLE) { 3101 id->route.addr.src_addr.ss_family = AF_INET; 3102 ret = rdma_bind_addr(id, cma_src_addr(id_priv)); 3103 if (ret) 3104 return ret; 3105 } 3106 3107 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN)) 3108 return -EINVAL; 3109 3110 if (id_priv->reuseaddr) { 3111 ret = cma_bind_listen(id_priv); 3112 if (ret) 3113 goto err; 3114 } 3115 3116 id_priv->backlog = backlog; 3117 if (id->device) { 3118 if (rdma_cap_ib_cm(id->device, 1)) { 3119 ret = cma_ib_listen(id_priv); 3120 if (ret) 3121 goto err; 3122 } else if (rdma_cap_iw_cm(id->device, 1)) { 3123 ret = cma_iw_listen(id_priv, backlog); 3124 if (ret) 3125 goto err; 3126 } else { 3127 ret = -ENOSYS; 3128 goto err; 3129 } 3130 } else 3131 cma_listen_on_all(id_priv); 3132 3133 return 0; 3134 err: 3135 id_priv->backlog = 0; 3136 cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND); 3137 return ret; 3138 } 3139 EXPORT_SYMBOL(rdma_listen); 3140 3141 int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr) 3142 { 3143 struct rdma_id_private *id_priv; 3144 int ret; 3145 3146 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6 && 3147 addr->sa_family != AF_IB) 3148 return -EAFNOSUPPORT; 3149 3150 id_priv = container_of(id, struct rdma_id_private, id); 3151 if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND)) 3152 return -EINVAL; 3153 3154 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr); 3155 if (ret) 3156 goto err1; 3157 3158 memcpy(cma_src_addr(id_priv), addr, rdma_addr_size(addr)); 3159 if (!cma_any_addr(addr)) { 3160 ret = cma_translate_addr(addr, &id->route.addr.dev_addr); 3161 if (ret) 3162 goto err1; 3163 3164 ret = cma_acquire_dev(id_priv, NULL); 3165 if (ret) 3166 goto err1; 3167 } 3168 3169 if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) { 3170 if (addr->sa_family == AF_INET) 3171 id_priv->afonly = 1; 3172 #if IS_ENABLED(CONFIG_IPV6) 3173 else if (addr->sa_family == AF_INET6) { 3174 struct net *net = id_priv->id.route.addr.dev_addr.net; 3175 3176 id_priv->afonly = net->ipv6.sysctl.bindv6only; 3177 } 3178 #endif 3179 } 3180 ret = cma_get_port(id_priv); 3181 if (ret) 3182 goto err2; 3183 3184 return 0; 3185 err2: 3186 if (id_priv->cma_dev) 3187 cma_release_dev(id_priv); 3188 err1: 3189 cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE); 3190 return ret; 3191 } 3192 EXPORT_SYMBOL(rdma_bind_addr); 3193 3194 static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv) 3195 { 3196 struct cma_hdr *cma_hdr; 3197 3198 cma_hdr = hdr; 3199 cma_hdr->cma_version = CMA_VERSION; 3200 if (cma_family(id_priv) == AF_INET) { 3201 struct sockaddr_in *src4, *dst4; 3202 3203 src4 = (struct sockaddr_in *) cma_src_addr(id_priv); 3204 dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv); 3205 3206 cma_set_ip_ver(cma_hdr, 4); 3207 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; 3208 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; 3209 cma_hdr->port = src4->sin_port; 3210 } else if (cma_family(id_priv) == AF_INET6) { 3211 struct sockaddr_in6 *src6, *dst6; 3212 3213 src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv); 3214 dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv); 3215 3216 cma_set_ip_ver(cma_hdr, 6); 3217 cma_hdr->src_addr.ip6 = src6->sin6_addr; 3218 cma_hdr->dst_addr.ip6 = dst6->sin6_addr; 3219 cma_hdr->port = src6->sin6_port; 3220 } 3221 return 0; 3222 } 3223 3224 static int cma_sidr_rep_handler(struct ib_cm_id *cm_id, 3225 struct ib_cm_event *ib_event) 3226 { 3227 struct rdma_id_private *id_priv = cm_id->context; 3228 struct rdma_cm_event event; 3229 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd; 3230 int ret = 0; 3231 3232 mutex_lock(&id_priv->handler_mutex); 3233 if (id_priv->state != RDMA_CM_CONNECT) 3234 goto out; 3235 3236 memset(&event, 0, sizeof event); 3237 switch (ib_event->event) { 3238 case IB_CM_SIDR_REQ_ERROR: 3239 event.event = RDMA_CM_EVENT_UNREACHABLE; 3240 event.status = -ETIMEDOUT; 3241 break; 3242 case IB_CM_SIDR_REP_RECEIVED: 3243 event.param.ud.private_data = ib_event->private_data; 3244 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE; 3245 if (rep->status != IB_SIDR_SUCCESS) { 3246 event.event = RDMA_CM_EVENT_UNREACHABLE; 3247 event.status = ib_event->param.sidr_rep_rcvd.status; 3248 break; 3249 } 3250 ret = cma_set_qkey(id_priv, rep->qkey); 3251 if (ret) { 3252 event.event = RDMA_CM_EVENT_ADDR_ERROR; 3253 event.status = ret; 3254 break; 3255 } 3256 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num, 3257 id_priv->id.route.path_rec, 3258 &event.param.ud.ah_attr); 3259 event.param.ud.qp_num = rep->qpn; 3260 event.param.ud.qkey = rep->qkey; 3261 event.event = RDMA_CM_EVENT_ESTABLISHED; 3262 event.status = 0; 3263 break; 3264 default: 3265 pr_err("RDMA CMA: unexpected IB CM event: %d\n", 3266 ib_event->event); 3267 goto out; 3268 } 3269 3270 ret = id_priv->id.event_handler(&id_priv->id, &event); 3271 if (ret) { 3272 /* Destroy the CM ID by returning a non-zero value. */ 3273 id_priv->cm_id.ib = NULL; 3274 cma_exch(id_priv, RDMA_CM_DESTROYING); 3275 mutex_unlock(&id_priv->handler_mutex); 3276 rdma_destroy_id(&id_priv->id); 3277 return ret; 3278 } 3279 out: 3280 mutex_unlock(&id_priv->handler_mutex); 3281 return ret; 3282 } 3283 3284 static int cma_resolve_ib_udp(struct rdma_id_private *id_priv, 3285 struct rdma_conn_param *conn_param) 3286 { 3287 struct ib_cm_sidr_req_param req; 3288 struct ib_cm_id *id; 3289 void *private_data; 3290 int offset, ret; 3291 3292 memset(&req, 0, sizeof req); 3293 offset = cma_user_data_offset(id_priv); 3294 req.private_data_len = offset + conn_param->private_data_len; 3295 if (req.private_data_len < conn_param->private_data_len) 3296 return -EINVAL; 3297 3298 if (req.private_data_len) { 3299 private_data = kzalloc(req.private_data_len, GFP_ATOMIC); 3300 if (!private_data) 3301 return -ENOMEM; 3302 } else { 3303 private_data = NULL; 3304 } 3305 3306 if (conn_param->private_data && conn_param->private_data_len) 3307 memcpy(private_data + offset, conn_param->private_data, 3308 conn_param->private_data_len); 3309 3310 if (private_data) { 3311 ret = cma_format_hdr(private_data, id_priv); 3312 if (ret) 3313 goto out; 3314 req.private_data = private_data; 3315 } 3316 3317 id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler, 3318 id_priv); 3319 if (IS_ERR(id)) { 3320 ret = PTR_ERR(id); 3321 goto out; 3322 } 3323 id_priv->cm_id.ib = id; 3324 3325 req.path = id_priv->id.route.path_rec; 3326 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv)); 3327 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8); 3328 req.max_cm_retries = CMA_MAX_CM_RETRIES; 3329 3330 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req); 3331 if (ret) { 3332 ib_destroy_cm_id(id_priv->cm_id.ib); 3333 id_priv->cm_id.ib = NULL; 3334 } 3335 out: 3336 kfree(private_data); 3337 return ret; 3338 } 3339 3340 static int cma_connect_ib(struct rdma_id_private *id_priv, 3341 struct rdma_conn_param *conn_param) 3342 { 3343 struct ib_cm_req_param req; 3344 struct rdma_route *route; 3345 void *private_data; 3346 struct ib_cm_id *id; 3347 int offset, ret; 3348 3349 memset(&req, 0, sizeof req); 3350 offset = cma_user_data_offset(id_priv); 3351 req.private_data_len = offset + conn_param->private_data_len; 3352 if (req.private_data_len < conn_param->private_data_len) 3353 return -EINVAL; 3354 3355 if (req.private_data_len) { 3356 private_data = kzalloc(req.private_data_len, GFP_ATOMIC); 3357 if (!private_data) 3358 return -ENOMEM; 3359 } else { 3360 private_data = NULL; 3361 } 3362 3363 if (conn_param->private_data && conn_param->private_data_len) 3364 memcpy(private_data + offset, conn_param->private_data, 3365 conn_param->private_data_len); 3366 3367 id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv); 3368 if (IS_ERR(id)) { 3369 ret = PTR_ERR(id); 3370 goto out; 3371 } 3372 id_priv->cm_id.ib = id; 3373 3374 route = &id_priv->id.route; 3375 if (private_data) { 3376 ret = cma_format_hdr(private_data, id_priv); 3377 if (ret) 3378 goto out; 3379 req.private_data = private_data; 3380 } 3381 3382 req.primary_path = &route->path_rec[0]; 3383 if (route->num_paths == 2) 3384 req.alternate_path = &route->path_rec[1]; 3385 3386 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv)); 3387 req.qp_num = id_priv->qp_num; 3388 req.qp_type = id_priv->id.qp_type; 3389 req.starting_psn = id_priv->seq_num; 3390 req.responder_resources = conn_param->responder_resources; 3391 req.initiator_depth = conn_param->initiator_depth; 3392 req.flow_control = conn_param->flow_control; 3393 req.retry_count = min_t(u8, 7, conn_param->retry_count); 3394 req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count); 3395 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; 3396 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; 3397 req.max_cm_retries = CMA_MAX_CM_RETRIES; 3398 req.srq = id_priv->srq ? 1 : 0; 3399 3400 ret = ib_send_cm_req(id_priv->cm_id.ib, &req); 3401 out: 3402 if (ret && !IS_ERR(id)) { 3403 ib_destroy_cm_id(id); 3404 id_priv->cm_id.ib = NULL; 3405 } 3406 3407 kfree(private_data); 3408 return ret; 3409 } 3410 3411 static int cma_connect_iw(struct rdma_id_private *id_priv, 3412 struct rdma_conn_param *conn_param) 3413 { 3414 struct iw_cm_id *cm_id; 3415 int ret; 3416 struct iw_cm_conn_param iw_param; 3417 3418 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv); 3419 if (IS_ERR(cm_id)) 3420 return PTR_ERR(cm_id); 3421 3422 cm_id->tos = id_priv->tos; 3423 id_priv->cm_id.iw = cm_id; 3424 3425 memcpy(&cm_id->local_addr, cma_src_addr(id_priv), 3426 rdma_addr_size(cma_src_addr(id_priv))); 3427 memcpy(&cm_id->remote_addr, cma_dst_addr(id_priv), 3428 rdma_addr_size(cma_dst_addr(id_priv))); 3429 3430 ret = cma_modify_qp_rtr(id_priv, conn_param); 3431 if (ret) 3432 goto out; 3433 3434 if (conn_param) { 3435 iw_param.ord = conn_param->initiator_depth; 3436 iw_param.ird = conn_param->responder_resources; 3437 iw_param.private_data = conn_param->private_data; 3438 iw_param.private_data_len = conn_param->private_data_len; 3439 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num; 3440 } else { 3441 memset(&iw_param, 0, sizeof iw_param); 3442 iw_param.qpn = id_priv->qp_num; 3443 } 3444 ret = iw_cm_connect(cm_id, &iw_param); 3445 out: 3446 if (ret) { 3447 iw_destroy_cm_id(cm_id); 3448 id_priv->cm_id.iw = NULL; 3449 } 3450 return ret; 3451 } 3452 3453 int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) 3454 { 3455 struct rdma_id_private *id_priv; 3456 int ret; 3457 3458 id_priv = container_of(id, struct rdma_id_private, id); 3459 if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT)) 3460 return -EINVAL; 3461 3462 if (!id->qp) { 3463 id_priv->qp_num = conn_param->qp_num; 3464 id_priv->srq = conn_param->srq; 3465 } 3466 3467 if (rdma_cap_ib_cm(id->device, id->port_num)) { 3468 if (id->qp_type == IB_QPT_UD) 3469 ret = cma_resolve_ib_udp(id_priv, conn_param); 3470 else 3471 ret = cma_connect_ib(id_priv, conn_param); 3472 } else if (rdma_cap_iw_cm(id->device, id->port_num)) 3473 ret = cma_connect_iw(id_priv, conn_param); 3474 else 3475 ret = -ENOSYS; 3476 if (ret) 3477 goto err; 3478 3479 return 0; 3480 err: 3481 cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED); 3482 return ret; 3483 } 3484 EXPORT_SYMBOL(rdma_connect); 3485 3486 static int cma_accept_ib(struct rdma_id_private *id_priv, 3487 struct rdma_conn_param *conn_param) 3488 { 3489 struct ib_cm_rep_param rep; 3490 int ret; 3491 3492 ret = cma_modify_qp_rtr(id_priv, conn_param); 3493 if (ret) 3494 goto out; 3495 3496 ret = cma_modify_qp_rts(id_priv, conn_param); 3497 if (ret) 3498 goto out; 3499 3500 memset(&rep, 0, sizeof rep); 3501 rep.qp_num = id_priv->qp_num; 3502 rep.starting_psn = id_priv->seq_num; 3503 rep.private_data = conn_param->private_data; 3504 rep.private_data_len = conn_param->private_data_len; 3505 rep.responder_resources = conn_param->responder_resources; 3506 rep.initiator_depth = conn_param->initiator_depth; 3507 rep.failover_accepted = 0; 3508 rep.flow_control = conn_param->flow_control; 3509 rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count); 3510 rep.srq = id_priv->srq ? 1 : 0; 3511 3512 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep); 3513 out: 3514 return ret; 3515 } 3516 3517 static int cma_accept_iw(struct rdma_id_private *id_priv, 3518 struct rdma_conn_param *conn_param) 3519 { 3520 struct iw_cm_conn_param iw_param; 3521 int ret; 3522 3523 ret = cma_modify_qp_rtr(id_priv, conn_param); 3524 if (ret) 3525 return ret; 3526 3527 iw_param.ord = conn_param->initiator_depth; 3528 iw_param.ird = conn_param->responder_resources; 3529 iw_param.private_data = conn_param->private_data; 3530 iw_param.private_data_len = conn_param->private_data_len; 3531 if (id_priv->id.qp) { 3532 iw_param.qpn = id_priv->qp_num; 3533 } else 3534 iw_param.qpn = conn_param->qp_num; 3535 3536 return iw_cm_accept(id_priv->cm_id.iw, &iw_param); 3537 } 3538 3539 static int cma_send_sidr_rep(struct rdma_id_private *id_priv, 3540 enum ib_cm_sidr_status status, u32 qkey, 3541 const void *private_data, int private_data_len) 3542 { 3543 struct ib_cm_sidr_rep_param rep; 3544 int ret; 3545 3546 memset(&rep, 0, sizeof rep); 3547 rep.status = status; 3548 if (status == IB_SIDR_SUCCESS) { 3549 ret = cma_set_qkey(id_priv, qkey); 3550 if (ret) 3551 return ret; 3552 rep.qp_num = id_priv->qp_num; 3553 rep.qkey = id_priv->qkey; 3554 } 3555 rep.private_data = private_data; 3556 rep.private_data_len = private_data_len; 3557 3558 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep); 3559 } 3560 3561 int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) 3562 { 3563 struct rdma_id_private *id_priv; 3564 int ret; 3565 3566 id_priv = container_of(id, struct rdma_id_private, id); 3567 3568 id_priv->owner = task_pid_nr(current); 3569 3570 if (!cma_comp(id_priv, RDMA_CM_CONNECT)) 3571 return -EINVAL; 3572 3573 if (!id->qp && conn_param) { 3574 id_priv->qp_num = conn_param->qp_num; 3575 id_priv->srq = conn_param->srq; 3576 } 3577 3578 if (rdma_cap_ib_cm(id->device, id->port_num)) { 3579 if (id->qp_type == IB_QPT_UD) { 3580 if (conn_param) 3581 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS, 3582 conn_param->qkey, 3583 conn_param->private_data, 3584 conn_param->private_data_len); 3585 else 3586 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS, 3587 0, NULL, 0); 3588 } else { 3589 if (conn_param) 3590 ret = cma_accept_ib(id_priv, conn_param); 3591 else 3592 ret = cma_rep_recv(id_priv); 3593 } 3594 } else if (rdma_cap_iw_cm(id->device, id->port_num)) 3595 ret = cma_accept_iw(id_priv, conn_param); 3596 else 3597 ret = -ENOSYS; 3598 3599 if (ret) 3600 goto reject; 3601 3602 return 0; 3603 reject: 3604 cma_modify_qp_err(id_priv); 3605 rdma_reject(id, NULL, 0); 3606 return ret; 3607 } 3608 EXPORT_SYMBOL(rdma_accept); 3609 3610 int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event) 3611 { 3612 struct rdma_id_private *id_priv; 3613 int ret; 3614 3615 id_priv = container_of(id, struct rdma_id_private, id); 3616 if (!id_priv->cm_id.ib) 3617 return -EINVAL; 3618 3619 switch (id->device->node_type) { 3620 case RDMA_NODE_IB_CA: 3621 ret = ib_cm_notify(id_priv->cm_id.ib, event); 3622 break; 3623 default: 3624 ret = 0; 3625 break; 3626 } 3627 return ret; 3628 } 3629 EXPORT_SYMBOL(rdma_notify); 3630 3631 int rdma_reject(struct rdma_cm_id *id, const void *private_data, 3632 u8 private_data_len) 3633 { 3634 struct rdma_id_private *id_priv; 3635 int ret; 3636 3637 id_priv = container_of(id, struct rdma_id_private, id); 3638 if (!id_priv->cm_id.ib) 3639 return -EINVAL; 3640 3641 if (rdma_cap_ib_cm(id->device, id->port_num)) { 3642 if (id->qp_type == IB_QPT_UD) 3643 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0, 3644 private_data, private_data_len); 3645 else 3646 ret = ib_send_cm_rej(id_priv->cm_id.ib, 3647 IB_CM_REJ_CONSUMER_DEFINED, NULL, 3648 0, private_data, private_data_len); 3649 } else if (rdma_cap_iw_cm(id->device, id->port_num)) { 3650 ret = iw_cm_reject(id_priv->cm_id.iw, 3651 private_data, private_data_len); 3652 } else 3653 ret = -ENOSYS; 3654 3655 return ret; 3656 } 3657 EXPORT_SYMBOL(rdma_reject); 3658 3659 int rdma_disconnect(struct rdma_cm_id *id) 3660 { 3661 struct rdma_id_private *id_priv; 3662 int ret; 3663 3664 id_priv = container_of(id, struct rdma_id_private, id); 3665 if (!id_priv->cm_id.ib) 3666 return -EINVAL; 3667 3668 if (rdma_cap_ib_cm(id->device, id->port_num)) { 3669 ret = cma_modify_qp_err(id_priv); 3670 if (ret) 3671 goto out; 3672 /* Initiate or respond to a disconnect. */ 3673 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0)) 3674 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0); 3675 } else if (rdma_cap_iw_cm(id->device, id->port_num)) { 3676 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0); 3677 } else 3678 ret = -EINVAL; 3679 3680 out: 3681 return ret; 3682 } 3683 EXPORT_SYMBOL(rdma_disconnect); 3684 3685 static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast) 3686 { 3687 struct rdma_id_private *id_priv; 3688 struct cma_multicast *mc = multicast->context; 3689 struct rdma_cm_event event; 3690 int ret = 0; 3691 3692 id_priv = mc->id_priv; 3693 mutex_lock(&id_priv->handler_mutex); 3694 if (id_priv->state != RDMA_CM_ADDR_BOUND && 3695 id_priv->state != RDMA_CM_ADDR_RESOLVED) 3696 goto out; 3697 3698 if (!status) 3699 status = cma_set_qkey(id_priv, be32_to_cpu(multicast->rec.qkey)); 3700 mutex_lock(&id_priv->qp_mutex); 3701 if (!status && id_priv->id.qp) 3702 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid, 3703 be16_to_cpu(multicast->rec.mlid)); 3704 mutex_unlock(&id_priv->qp_mutex); 3705 3706 memset(&event, 0, sizeof event); 3707 event.status = status; 3708 event.param.ud.private_data = mc->context; 3709 if (!status) { 3710 struct rdma_dev_addr *dev_addr = 3711 &id_priv->id.route.addr.dev_addr; 3712 struct net_device *ndev = 3713 dev_get_by_index(&init_net, dev_addr->bound_dev_if); 3714 enum ib_gid_type gid_type = 3715 id_priv->cma_dev->default_gid_type[id_priv->id.port_num - 3716 rdma_start_port(id_priv->cma_dev->device)]; 3717 3718 event.event = RDMA_CM_EVENT_MULTICAST_JOIN; 3719 ib_init_ah_from_mcmember(id_priv->id.device, 3720 id_priv->id.port_num, &multicast->rec, 3721 ndev, gid_type, 3722 &event.param.ud.ah_attr); 3723 event.param.ud.qp_num = 0xFFFFFF; 3724 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey); 3725 if (ndev) 3726 dev_put(ndev); 3727 } else 3728 event.event = RDMA_CM_EVENT_MULTICAST_ERROR; 3729 3730 ret = id_priv->id.event_handler(&id_priv->id, &event); 3731 if (ret) { 3732 cma_exch(id_priv, RDMA_CM_DESTROYING); 3733 mutex_unlock(&id_priv->handler_mutex); 3734 rdma_destroy_id(&id_priv->id); 3735 return 0; 3736 } 3737 3738 out: 3739 mutex_unlock(&id_priv->handler_mutex); 3740 return 0; 3741 } 3742 3743 static void cma_set_mgid(struct rdma_id_private *id_priv, 3744 struct sockaddr *addr, union ib_gid *mgid) 3745 { 3746 unsigned char mc_map[MAX_ADDR_LEN]; 3747 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 3748 struct sockaddr_in *sin = (struct sockaddr_in *) addr; 3749 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr; 3750 3751 if (cma_any_addr(addr)) { 3752 memset(mgid, 0, sizeof *mgid); 3753 } else if ((addr->sa_family == AF_INET6) && 3754 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) == 3755 0xFF10A01B)) { 3756 /* IPv6 address is an SA assigned MGID. */ 3757 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid); 3758 } else if (addr->sa_family == AF_IB) { 3759 memcpy(mgid, &((struct sockaddr_ib *) addr)->sib_addr, sizeof *mgid); 3760 } else if ((addr->sa_family == AF_INET6)) { 3761 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map); 3762 if (id_priv->id.ps == RDMA_PS_UDP) 3763 mc_map[7] = 0x01; /* Use RDMA CM signature */ 3764 *mgid = *(union ib_gid *) (mc_map + 4); 3765 } else { 3766 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map); 3767 if (id_priv->id.ps == RDMA_PS_UDP) 3768 mc_map[7] = 0x01; /* Use RDMA CM signature */ 3769 *mgid = *(union ib_gid *) (mc_map + 4); 3770 } 3771 } 3772 3773 static void cma_query_sa_classport_info_cb(int status, 3774 struct ib_class_port_info *rec, 3775 void *context) 3776 { 3777 struct class_port_info_context *cb_ctx = context; 3778 3779 WARN_ON(!context); 3780 3781 if (status || !rec) { 3782 pr_debug("RDMA CM: %s port %u failed query ClassPortInfo status: %d\n", 3783 cb_ctx->device->name, cb_ctx->port_num, status); 3784 goto out; 3785 } 3786 3787 memcpy(cb_ctx->class_port_info, rec, sizeof(struct ib_class_port_info)); 3788 3789 out: 3790 complete(&cb_ctx->done); 3791 } 3792 3793 static int cma_query_sa_classport_info(struct ib_device *device, u8 port_num, 3794 struct ib_class_port_info *class_port_info) 3795 { 3796 struct class_port_info_context *cb_ctx; 3797 int ret; 3798 3799 cb_ctx = kmalloc(sizeof(*cb_ctx), GFP_KERNEL); 3800 if (!cb_ctx) 3801 return -ENOMEM; 3802 3803 cb_ctx->device = device; 3804 cb_ctx->class_port_info = class_port_info; 3805 cb_ctx->port_num = port_num; 3806 init_completion(&cb_ctx->done); 3807 3808 ret = ib_sa_classport_info_rec_query(&sa_client, device, port_num, 3809 CMA_QUERY_CLASSPORT_INFO_TIMEOUT, 3810 GFP_KERNEL, cma_query_sa_classport_info_cb, 3811 cb_ctx, &cb_ctx->sa_query); 3812 if (ret < 0) { 3813 pr_err("RDMA CM: %s port %u failed to send ClassPortInfo query, ret: %d\n", 3814 device->name, port_num, ret); 3815 goto out; 3816 } 3817 3818 wait_for_completion(&cb_ctx->done); 3819 3820 out: 3821 kfree(cb_ctx); 3822 return ret; 3823 } 3824 3825 static int cma_join_ib_multicast(struct rdma_id_private *id_priv, 3826 struct cma_multicast *mc) 3827 { 3828 struct ib_sa_mcmember_rec rec; 3829 struct ib_class_port_info class_port_info; 3830 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 3831 ib_sa_comp_mask comp_mask; 3832 int ret; 3833 3834 ib_addr_get_mgid(dev_addr, &rec.mgid); 3835 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num, 3836 &rec.mgid, &rec); 3837 if (ret) 3838 return ret; 3839 3840 ret = cma_set_qkey(id_priv, 0); 3841 if (ret) 3842 return ret; 3843 3844 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid); 3845 rec.qkey = cpu_to_be32(id_priv->qkey); 3846 rdma_addr_get_sgid(dev_addr, &rec.port_gid); 3847 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); 3848 rec.join_state = mc->join_state; 3849 3850 if (rec.join_state == BIT(SENDONLY_FULLMEMBER_JOIN)) { 3851 ret = cma_query_sa_classport_info(id_priv->id.device, 3852 id_priv->id.port_num, 3853 &class_port_info); 3854 3855 if (ret) 3856 return ret; 3857 3858 if (!(ib_get_cpi_capmask2(&class_port_info) & 3859 IB_SA_CAP_MASK2_SENDONLY_FULL_MEM_SUPPORT)) { 3860 pr_warn("RDMA CM: %s port %u Unable to multicast join\n" 3861 "RDMA CM: SM doesn't support Send Only Full Member option\n", 3862 id_priv->id.device->name, id_priv->id.port_num); 3863 return -EOPNOTSUPP; 3864 } 3865 } 3866 3867 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID | 3868 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE | 3869 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL | 3870 IB_SA_MCMEMBER_REC_FLOW_LABEL | 3871 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS; 3872 3873 if (id_priv->id.ps == RDMA_PS_IPOIB) 3874 comp_mask |= IB_SA_MCMEMBER_REC_RATE | 3875 IB_SA_MCMEMBER_REC_RATE_SELECTOR | 3876 IB_SA_MCMEMBER_REC_MTU_SELECTOR | 3877 IB_SA_MCMEMBER_REC_MTU | 3878 IB_SA_MCMEMBER_REC_HOP_LIMIT; 3879 3880 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device, 3881 id_priv->id.port_num, &rec, 3882 comp_mask, GFP_KERNEL, 3883 cma_ib_mc_handler, mc); 3884 return PTR_ERR_OR_ZERO(mc->multicast.ib); 3885 } 3886 3887 static void iboe_mcast_work_handler(struct work_struct *work) 3888 { 3889 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work); 3890 struct cma_multicast *mc = mw->mc; 3891 struct ib_sa_multicast *m = mc->multicast.ib; 3892 3893 mc->multicast.ib->context = mc; 3894 cma_ib_mc_handler(0, m); 3895 kref_put(&mc->mcref, release_mc); 3896 kfree(mw); 3897 } 3898 3899 static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid) 3900 { 3901 struct sockaddr_in *sin = (struct sockaddr_in *)addr; 3902 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr; 3903 3904 if (cma_any_addr(addr)) { 3905 memset(mgid, 0, sizeof *mgid); 3906 } else if (addr->sa_family == AF_INET6) { 3907 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid); 3908 } else { 3909 mgid->raw[0] = 0xff; 3910 mgid->raw[1] = 0x0e; 3911 mgid->raw[2] = 0; 3912 mgid->raw[3] = 0; 3913 mgid->raw[4] = 0; 3914 mgid->raw[5] = 0; 3915 mgid->raw[6] = 0; 3916 mgid->raw[7] = 0; 3917 mgid->raw[8] = 0; 3918 mgid->raw[9] = 0; 3919 mgid->raw[10] = 0xff; 3920 mgid->raw[11] = 0xff; 3921 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr; 3922 } 3923 } 3924 3925 static int cma_iboe_join_multicast(struct rdma_id_private *id_priv, 3926 struct cma_multicast *mc) 3927 { 3928 struct iboe_mcast_work *work; 3929 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 3930 int err = 0; 3931 struct sockaddr *addr = (struct sockaddr *)&mc->addr; 3932 struct net_device *ndev = NULL; 3933 enum ib_gid_type gid_type; 3934 bool send_only; 3935 3936 send_only = mc->join_state == BIT(SENDONLY_FULLMEMBER_JOIN); 3937 3938 if (cma_zero_addr((struct sockaddr *)&mc->addr)) 3939 return -EINVAL; 3940 3941 work = kzalloc(sizeof *work, GFP_KERNEL); 3942 if (!work) 3943 return -ENOMEM; 3944 3945 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL); 3946 if (!mc->multicast.ib) { 3947 err = -ENOMEM; 3948 goto out1; 3949 } 3950 3951 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid); 3952 3953 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff); 3954 if (id_priv->id.ps == RDMA_PS_UDP) 3955 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY); 3956 3957 if (dev_addr->bound_dev_if) 3958 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if); 3959 if (!ndev) { 3960 err = -ENODEV; 3961 goto out2; 3962 } 3963 mc->multicast.ib->rec.rate = iboe_get_rate(ndev); 3964 mc->multicast.ib->rec.hop_limit = 1; 3965 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu); 3966 3967 gid_type = id_priv->cma_dev->default_gid_type[id_priv->id.port_num - 3968 rdma_start_port(id_priv->cma_dev->device)]; 3969 if (addr->sa_family == AF_INET) { 3970 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) { 3971 mc->multicast.ib->rec.hop_limit = IPV6_DEFAULT_HOPLIMIT; 3972 if (!send_only) { 3973 err = cma_igmp_send(ndev, &mc->multicast.ib->rec.mgid, 3974 true); 3975 if (!err) 3976 mc->igmp_joined = true; 3977 } 3978 } 3979 } else { 3980 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) 3981 err = -ENOTSUPP; 3982 } 3983 dev_put(ndev); 3984 if (err || !mc->multicast.ib->rec.mtu) { 3985 if (!err) 3986 err = -EINVAL; 3987 goto out2; 3988 } 3989 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr, 3990 &mc->multicast.ib->rec.port_gid); 3991 work->id = id_priv; 3992 work->mc = mc; 3993 INIT_WORK(&work->work, iboe_mcast_work_handler); 3994 kref_get(&mc->mcref); 3995 queue_work(cma_wq, &work->work); 3996 3997 return 0; 3998 3999 out2: 4000 kfree(mc->multicast.ib); 4001 out1: 4002 kfree(work); 4003 return err; 4004 } 4005 4006 int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr, 4007 u8 join_state, void *context) 4008 { 4009 struct rdma_id_private *id_priv; 4010 struct cma_multicast *mc; 4011 int ret; 4012 4013 id_priv = container_of(id, struct rdma_id_private, id); 4014 if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) && 4015 !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED)) 4016 return -EINVAL; 4017 4018 mc = kmalloc(sizeof *mc, GFP_KERNEL); 4019 if (!mc) 4020 return -ENOMEM; 4021 4022 memcpy(&mc->addr, addr, rdma_addr_size(addr)); 4023 mc->context = context; 4024 mc->id_priv = id_priv; 4025 mc->igmp_joined = false; 4026 mc->join_state = join_state; 4027 spin_lock(&id_priv->lock); 4028 list_add(&mc->list, &id_priv->mc_list); 4029 spin_unlock(&id_priv->lock); 4030 4031 if (rdma_protocol_roce(id->device, id->port_num)) { 4032 kref_init(&mc->mcref); 4033 ret = cma_iboe_join_multicast(id_priv, mc); 4034 } else if (rdma_cap_ib_mcast(id->device, id->port_num)) 4035 ret = cma_join_ib_multicast(id_priv, mc); 4036 else 4037 ret = -ENOSYS; 4038 4039 if (ret) { 4040 spin_lock_irq(&id_priv->lock); 4041 list_del(&mc->list); 4042 spin_unlock_irq(&id_priv->lock); 4043 kfree(mc); 4044 } 4045 return ret; 4046 } 4047 EXPORT_SYMBOL(rdma_join_multicast); 4048 4049 void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr) 4050 { 4051 struct rdma_id_private *id_priv; 4052 struct cma_multicast *mc; 4053 4054 id_priv = container_of(id, struct rdma_id_private, id); 4055 spin_lock_irq(&id_priv->lock); 4056 list_for_each_entry(mc, &id_priv->mc_list, list) { 4057 if (!memcmp(&mc->addr, addr, rdma_addr_size(addr))) { 4058 list_del(&mc->list); 4059 spin_unlock_irq(&id_priv->lock); 4060 4061 if (id->qp) 4062 ib_detach_mcast(id->qp, 4063 &mc->multicast.ib->rec.mgid, 4064 be16_to_cpu(mc->multicast.ib->rec.mlid)); 4065 4066 BUG_ON(id_priv->cma_dev->device != id->device); 4067 4068 if (rdma_cap_ib_mcast(id->device, id->port_num)) { 4069 ib_sa_free_multicast(mc->multicast.ib); 4070 kfree(mc); 4071 } else if (rdma_protocol_roce(id->device, id->port_num)) { 4072 if (mc->igmp_joined) { 4073 struct rdma_dev_addr *dev_addr = 4074 &id->route.addr.dev_addr; 4075 struct net_device *ndev = NULL; 4076 4077 if (dev_addr->bound_dev_if) 4078 ndev = dev_get_by_index(&init_net, 4079 dev_addr->bound_dev_if); 4080 if (ndev) { 4081 cma_igmp_send(ndev, 4082 &mc->multicast.ib->rec.mgid, 4083 false); 4084 dev_put(ndev); 4085 } 4086 mc->igmp_joined = false; 4087 } 4088 kref_put(&mc->mcref, release_mc); 4089 } 4090 return; 4091 } 4092 } 4093 spin_unlock_irq(&id_priv->lock); 4094 } 4095 EXPORT_SYMBOL(rdma_leave_multicast); 4096 4097 static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv) 4098 { 4099 struct rdma_dev_addr *dev_addr; 4100 struct cma_ndev_work *work; 4101 4102 dev_addr = &id_priv->id.route.addr.dev_addr; 4103 4104 if ((dev_addr->bound_dev_if == ndev->ifindex) && 4105 (net_eq(dev_net(ndev), dev_addr->net)) && 4106 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) { 4107 pr_info("RDMA CM addr change for ndev %s used by id %p\n", 4108 ndev->name, &id_priv->id); 4109 work = kzalloc(sizeof *work, GFP_KERNEL); 4110 if (!work) 4111 return -ENOMEM; 4112 4113 INIT_WORK(&work->work, cma_ndev_work_handler); 4114 work->id = id_priv; 4115 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE; 4116 atomic_inc(&id_priv->refcount); 4117 queue_work(cma_wq, &work->work); 4118 } 4119 4120 return 0; 4121 } 4122 4123 static int cma_netdev_callback(struct notifier_block *self, unsigned long event, 4124 void *ptr) 4125 { 4126 struct net_device *ndev = netdev_notifier_info_to_dev(ptr); 4127 struct cma_device *cma_dev; 4128 struct rdma_id_private *id_priv; 4129 int ret = NOTIFY_DONE; 4130 4131 if (event != NETDEV_BONDING_FAILOVER) 4132 return NOTIFY_DONE; 4133 4134 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING)) 4135 return NOTIFY_DONE; 4136 4137 mutex_lock(&lock); 4138 list_for_each_entry(cma_dev, &dev_list, list) 4139 list_for_each_entry(id_priv, &cma_dev->id_list, list) { 4140 ret = cma_netdev_change(ndev, id_priv); 4141 if (ret) 4142 goto out; 4143 } 4144 4145 out: 4146 mutex_unlock(&lock); 4147 return ret; 4148 } 4149 4150 static struct notifier_block cma_nb = { 4151 .notifier_call = cma_netdev_callback 4152 }; 4153 4154 static void cma_add_one(struct ib_device *device) 4155 { 4156 struct cma_device *cma_dev; 4157 struct rdma_id_private *id_priv; 4158 unsigned int i; 4159 unsigned long supported_gids = 0; 4160 4161 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL); 4162 if (!cma_dev) 4163 return; 4164 4165 cma_dev->device = device; 4166 cma_dev->default_gid_type = kcalloc(device->phys_port_cnt, 4167 sizeof(*cma_dev->default_gid_type), 4168 GFP_KERNEL); 4169 if (!cma_dev->default_gid_type) { 4170 kfree(cma_dev); 4171 return; 4172 } 4173 for (i = rdma_start_port(device); i <= rdma_end_port(device); i++) { 4174 supported_gids = roce_gid_type_mask_support(device, i); 4175 WARN_ON(!supported_gids); 4176 cma_dev->default_gid_type[i - rdma_start_port(device)] = 4177 find_first_bit(&supported_gids, BITS_PER_LONG); 4178 } 4179 4180 init_completion(&cma_dev->comp); 4181 atomic_set(&cma_dev->refcount, 1); 4182 INIT_LIST_HEAD(&cma_dev->id_list); 4183 ib_set_client_data(device, &cma_client, cma_dev); 4184 4185 mutex_lock(&lock); 4186 list_add_tail(&cma_dev->list, &dev_list); 4187 list_for_each_entry(id_priv, &listen_any_list, list) 4188 cma_listen_on_dev(id_priv, cma_dev); 4189 mutex_unlock(&lock); 4190 } 4191 4192 static int cma_remove_id_dev(struct rdma_id_private *id_priv) 4193 { 4194 struct rdma_cm_event event; 4195 enum rdma_cm_state state; 4196 int ret = 0; 4197 4198 /* Record that we want to remove the device */ 4199 state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL); 4200 if (state == RDMA_CM_DESTROYING) 4201 return 0; 4202 4203 cma_cancel_operation(id_priv, state); 4204 mutex_lock(&id_priv->handler_mutex); 4205 4206 /* Check for destruction from another callback. */ 4207 if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL)) 4208 goto out; 4209 4210 memset(&event, 0, sizeof event); 4211 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL; 4212 ret = id_priv->id.event_handler(&id_priv->id, &event); 4213 out: 4214 mutex_unlock(&id_priv->handler_mutex); 4215 return ret; 4216 } 4217 4218 static void cma_process_remove(struct cma_device *cma_dev) 4219 { 4220 struct rdma_id_private *id_priv; 4221 int ret; 4222 4223 mutex_lock(&lock); 4224 while (!list_empty(&cma_dev->id_list)) { 4225 id_priv = list_entry(cma_dev->id_list.next, 4226 struct rdma_id_private, list); 4227 4228 list_del(&id_priv->listen_list); 4229 list_del_init(&id_priv->list); 4230 atomic_inc(&id_priv->refcount); 4231 mutex_unlock(&lock); 4232 4233 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv); 4234 cma_deref_id(id_priv); 4235 if (ret) 4236 rdma_destroy_id(&id_priv->id); 4237 4238 mutex_lock(&lock); 4239 } 4240 mutex_unlock(&lock); 4241 4242 cma_deref_dev(cma_dev); 4243 wait_for_completion(&cma_dev->comp); 4244 } 4245 4246 static void cma_remove_one(struct ib_device *device, void *client_data) 4247 { 4248 struct cma_device *cma_dev = client_data; 4249 4250 if (!cma_dev) 4251 return; 4252 4253 mutex_lock(&lock); 4254 list_del(&cma_dev->list); 4255 mutex_unlock(&lock); 4256 4257 cma_process_remove(cma_dev); 4258 kfree(cma_dev->default_gid_type); 4259 kfree(cma_dev); 4260 } 4261 4262 static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb) 4263 { 4264 struct nlmsghdr *nlh; 4265 struct rdma_cm_id_stats *id_stats; 4266 struct rdma_id_private *id_priv; 4267 struct rdma_cm_id *id = NULL; 4268 struct cma_device *cma_dev; 4269 int i_dev = 0, i_id = 0; 4270 4271 /* 4272 * We export all of the IDs as a sequence of messages. Each 4273 * ID gets its own netlink message. 4274 */ 4275 mutex_lock(&lock); 4276 4277 list_for_each_entry(cma_dev, &dev_list, list) { 4278 if (i_dev < cb->args[0]) { 4279 i_dev++; 4280 continue; 4281 } 4282 4283 i_id = 0; 4284 list_for_each_entry(id_priv, &cma_dev->id_list, list) { 4285 if (i_id < cb->args[1]) { 4286 i_id++; 4287 continue; 4288 } 4289 4290 id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq, 4291 sizeof *id_stats, RDMA_NL_RDMA_CM, 4292 RDMA_NL_RDMA_CM_ID_STATS, 4293 NLM_F_MULTI); 4294 if (!id_stats) 4295 goto out; 4296 4297 memset(id_stats, 0, sizeof *id_stats); 4298 id = &id_priv->id; 4299 id_stats->node_type = id->route.addr.dev_addr.dev_type; 4300 id_stats->port_num = id->port_num; 4301 id_stats->bound_dev_if = 4302 id->route.addr.dev_addr.bound_dev_if; 4303 4304 if (ibnl_put_attr(skb, nlh, 4305 rdma_addr_size(cma_src_addr(id_priv)), 4306 cma_src_addr(id_priv), 4307 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR)) 4308 goto out; 4309 if (ibnl_put_attr(skb, nlh, 4310 rdma_addr_size(cma_src_addr(id_priv)), 4311 cma_dst_addr(id_priv), 4312 RDMA_NL_RDMA_CM_ATTR_DST_ADDR)) 4313 goto out; 4314 4315 id_stats->pid = id_priv->owner; 4316 id_stats->port_space = id->ps; 4317 id_stats->cm_state = id_priv->state; 4318 id_stats->qp_num = id_priv->qp_num; 4319 id_stats->qp_type = id->qp_type; 4320 4321 i_id++; 4322 } 4323 4324 cb->args[1] = 0; 4325 i_dev++; 4326 } 4327 4328 out: 4329 mutex_unlock(&lock); 4330 cb->args[0] = i_dev; 4331 cb->args[1] = i_id; 4332 4333 return skb->len; 4334 } 4335 4336 static const struct ibnl_client_cbs cma_cb_table[] = { 4337 [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats, 4338 .module = THIS_MODULE }, 4339 }; 4340 4341 static int cma_init_net(struct net *net) 4342 { 4343 struct cma_pernet *pernet = cma_pernet(net); 4344 4345 idr_init(&pernet->tcp_ps); 4346 idr_init(&pernet->udp_ps); 4347 idr_init(&pernet->ipoib_ps); 4348 idr_init(&pernet->ib_ps); 4349 4350 return 0; 4351 } 4352 4353 static void cma_exit_net(struct net *net) 4354 { 4355 struct cma_pernet *pernet = cma_pernet(net); 4356 4357 idr_destroy(&pernet->tcp_ps); 4358 idr_destroy(&pernet->udp_ps); 4359 idr_destroy(&pernet->ipoib_ps); 4360 idr_destroy(&pernet->ib_ps); 4361 } 4362 4363 static struct pernet_operations cma_pernet_operations = { 4364 .init = cma_init_net, 4365 .exit = cma_exit_net, 4366 .id = &cma_pernet_id, 4367 .size = sizeof(struct cma_pernet), 4368 }; 4369 4370 static int __init cma_init(void) 4371 { 4372 int ret; 4373 4374 cma_wq = alloc_ordered_workqueue("rdma_cm", WQ_MEM_RECLAIM); 4375 if (!cma_wq) 4376 return -ENOMEM; 4377 4378 ret = register_pernet_subsys(&cma_pernet_operations); 4379 if (ret) 4380 goto err_wq; 4381 4382 ib_sa_register_client(&sa_client); 4383 rdma_addr_register_client(&addr_client); 4384 register_netdevice_notifier(&cma_nb); 4385 4386 ret = ib_register_client(&cma_client); 4387 if (ret) 4388 goto err; 4389 4390 if (ibnl_add_client(RDMA_NL_RDMA_CM, ARRAY_SIZE(cma_cb_table), 4391 cma_cb_table)) 4392 pr_warn("RDMA CMA: failed to add netlink callback\n"); 4393 cma_configfs_init(); 4394 4395 return 0; 4396 4397 err: 4398 unregister_netdevice_notifier(&cma_nb); 4399 rdma_addr_unregister_client(&addr_client); 4400 ib_sa_unregister_client(&sa_client); 4401 err_wq: 4402 destroy_workqueue(cma_wq); 4403 return ret; 4404 } 4405 4406 static void __exit cma_cleanup(void) 4407 { 4408 cma_configfs_exit(); 4409 ibnl_remove_client(RDMA_NL_RDMA_CM); 4410 ib_unregister_client(&cma_client); 4411 unregister_netdevice_notifier(&cma_nb); 4412 rdma_addr_unregister_client(&addr_client); 4413 ib_sa_unregister_client(&sa_client); 4414 unregister_pernet_subsys(&cma_pernet_operations); 4415 destroy_workqueue(cma_wq); 4416 } 4417 4418 module_init(cma_init); 4419 module_exit(cma_cleanup); 4420