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 unsigned 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 enum ib_gid_type cma_route_gid_type(enum rdma_network_type network_type, 2442 unsigned long supported_gids, 2443 enum ib_gid_type default_gid) 2444 { 2445 if ((network_type == RDMA_NETWORK_IPV4 || 2446 network_type == RDMA_NETWORK_IPV6) && 2447 test_bit(IB_GID_TYPE_ROCE_UDP_ENCAP, &supported_gids)) 2448 return IB_GID_TYPE_ROCE_UDP_ENCAP; 2449 2450 return default_gid; 2451 } 2452 2453 static int cma_resolve_iboe_route(struct rdma_id_private *id_priv) 2454 { 2455 struct rdma_route *route = &id_priv->id.route; 2456 struct rdma_addr *addr = &route->addr; 2457 struct cma_work *work; 2458 int ret; 2459 struct net_device *ndev = NULL; 2460 2461 2462 work = kzalloc(sizeof *work, GFP_KERNEL); 2463 if (!work) 2464 return -ENOMEM; 2465 2466 work->id = id_priv; 2467 INIT_WORK(&work->work, cma_work_handler); 2468 2469 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL); 2470 if (!route->path_rec) { 2471 ret = -ENOMEM; 2472 goto err1; 2473 } 2474 2475 route->num_paths = 1; 2476 2477 if (addr->dev_addr.bound_dev_if) { 2478 unsigned long supported_gids; 2479 2480 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if); 2481 if (!ndev) { 2482 ret = -ENODEV; 2483 goto err2; 2484 } 2485 2486 if (ndev->flags & IFF_LOOPBACK) { 2487 dev_put(ndev); 2488 if (!id_priv->id.device->get_netdev) { 2489 ret = -EOPNOTSUPP; 2490 goto err2; 2491 } 2492 2493 ndev = id_priv->id.device->get_netdev(id_priv->id.device, 2494 id_priv->id.port_num); 2495 if (!ndev) { 2496 ret = -ENODEV; 2497 goto err2; 2498 } 2499 } 2500 2501 route->path_rec->net = &init_net; 2502 route->path_rec->ifindex = ndev->ifindex; 2503 supported_gids = roce_gid_type_mask_support(id_priv->id.device, 2504 id_priv->id.port_num); 2505 route->path_rec->gid_type = 2506 cma_route_gid_type(addr->dev_addr.network, 2507 supported_gids, 2508 id_priv->gid_type); 2509 } 2510 if (!ndev) { 2511 ret = -ENODEV; 2512 goto err2; 2513 } 2514 2515 memcpy(route->path_rec->dmac, addr->dev_addr.dst_dev_addr, ETH_ALEN); 2516 2517 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr, 2518 &route->path_rec->sgid); 2519 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.dst_addr, 2520 &route->path_rec->dgid); 2521 2522 /* Use the hint from IP Stack to select GID Type */ 2523 if (route->path_rec->gid_type < ib_network_to_gid_type(addr->dev_addr.network)) 2524 route->path_rec->gid_type = ib_network_to_gid_type(addr->dev_addr.network); 2525 if (((struct sockaddr *)&id_priv->id.route.addr.dst_addr)->sa_family != AF_IB) 2526 /* TODO: get the hoplimit from the inet/inet6 device */ 2527 route->path_rec->hop_limit = addr->dev_addr.hoplimit; 2528 else 2529 route->path_rec->hop_limit = 1; 2530 route->path_rec->reversible = 1; 2531 route->path_rec->pkey = cpu_to_be16(0xffff); 2532 route->path_rec->mtu_selector = IB_SA_EQ; 2533 route->path_rec->sl = iboe_tos_to_sl(ndev, id_priv->tos); 2534 route->path_rec->mtu = iboe_get_mtu(ndev->mtu); 2535 route->path_rec->rate_selector = IB_SA_EQ; 2536 route->path_rec->rate = iboe_get_rate(ndev); 2537 dev_put(ndev); 2538 route->path_rec->packet_life_time_selector = IB_SA_EQ; 2539 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME; 2540 if (!route->path_rec->mtu) { 2541 ret = -EINVAL; 2542 goto err2; 2543 } 2544 2545 work->old_state = RDMA_CM_ROUTE_QUERY; 2546 work->new_state = RDMA_CM_ROUTE_RESOLVED; 2547 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 2548 work->event.status = 0; 2549 2550 queue_work(cma_wq, &work->work); 2551 2552 return 0; 2553 2554 err2: 2555 kfree(route->path_rec); 2556 route->path_rec = NULL; 2557 err1: 2558 kfree(work); 2559 return ret; 2560 } 2561 2562 int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms) 2563 { 2564 struct rdma_id_private *id_priv; 2565 int ret; 2566 2567 id_priv = container_of(id, struct rdma_id_private, id); 2568 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY)) 2569 return -EINVAL; 2570 2571 atomic_inc(&id_priv->refcount); 2572 if (rdma_cap_ib_sa(id->device, id->port_num)) 2573 ret = cma_resolve_ib_route(id_priv, timeout_ms); 2574 else if (rdma_protocol_roce(id->device, id->port_num)) 2575 ret = cma_resolve_iboe_route(id_priv); 2576 else if (rdma_protocol_iwarp(id->device, id->port_num)) 2577 ret = cma_resolve_iw_route(id_priv, timeout_ms); 2578 else 2579 ret = -ENOSYS; 2580 2581 if (ret) 2582 goto err; 2583 2584 return 0; 2585 err: 2586 cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED); 2587 cma_deref_id(id_priv); 2588 return ret; 2589 } 2590 EXPORT_SYMBOL(rdma_resolve_route); 2591 2592 static void cma_set_loopback(struct sockaddr *addr) 2593 { 2594 switch (addr->sa_family) { 2595 case AF_INET: 2596 ((struct sockaddr_in *) addr)->sin_addr.s_addr = htonl(INADDR_LOOPBACK); 2597 break; 2598 case AF_INET6: 2599 ipv6_addr_set(&((struct sockaddr_in6 *) addr)->sin6_addr, 2600 0, 0, 0, htonl(1)); 2601 break; 2602 default: 2603 ib_addr_set(&((struct sockaddr_ib *) addr)->sib_addr, 2604 0, 0, 0, htonl(1)); 2605 break; 2606 } 2607 } 2608 2609 static int cma_bind_loopback(struct rdma_id_private *id_priv) 2610 { 2611 struct cma_device *cma_dev, *cur_dev; 2612 struct ib_port_attr port_attr; 2613 union ib_gid gid; 2614 u16 pkey; 2615 int ret; 2616 u8 p; 2617 2618 cma_dev = NULL; 2619 mutex_lock(&lock); 2620 list_for_each_entry(cur_dev, &dev_list, list) { 2621 if (cma_family(id_priv) == AF_IB && 2622 !rdma_cap_ib_cm(cur_dev->device, 1)) 2623 continue; 2624 2625 if (!cma_dev) 2626 cma_dev = cur_dev; 2627 2628 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) { 2629 if (!ib_query_port(cur_dev->device, p, &port_attr) && 2630 port_attr.state == IB_PORT_ACTIVE) { 2631 cma_dev = cur_dev; 2632 goto port_found; 2633 } 2634 } 2635 } 2636 2637 if (!cma_dev) { 2638 ret = -ENODEV; 2639 goto out; 2640 } 2641 2642 p = 1; 2643 2644 port_found: 2645 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid, NULL); 2646 if (ret) 2647 goto out; 2648 2649 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey); 2650 if (ret) 2651 goto out; 2652 2653 id_priv->id.route.addr.dev_addr.dev_type = 2654 (rdma_protocol_ib(cma_dev->device, p)) ? 2655 ARPHRD_INFINIBAND : ARPHRD_ETHER; 2656 2657 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid); 2658 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey); 2659 id_priv->id.port_num = p; 2660 cma_attach_to_dev(id_priv, cma_dev); 2661 cma_set_loopback(cma_src_addr(id_priv)); 2662 out: 2663 mutex_unlock(&lock); 2664 return ret; 2665 } 2666 2667 static void addr_handler(int status, struct sockaddr *src_addr, 2668 struct rdma_dev_addr *dev_addr, void *context) 2669 { 2670 struct rdma_id_private *id_priv = context; 2671 struct rdma_cm_event event; 2672 2673 memset(&event, 0, sizeof event); 2674 mutex_lock(&id_priv->handler_mutex); 2675 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, 2676 RDMA_CM_ADDR_RESOLVED)) 2677 goto out; 2678 2679 memcpy(cma_src_addr(id_priv), src_addr, rdma_addr_size(src_addr)); 2680 if (!status && !id_priv->cma_dev) 2681 status = cma_acquire_dev(id_priv, NULL); 2682 2683 if (status) { 2684 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, 2685 RDMA_CM_ADDR_BOUND)) 2686 goto out; 2687 event.event = RDMA_CM_EVENT_ADDR_ERROR; 2688 event.status = status; 2689 } else 2690 event.event = RDMA_CM_EVENT_ADDR_RESOLVED; 2691 2692 if (id_priv->id.event_handler(&id_priv->id, &event)) { 2693 cma_exch(id_priv, RDMA_CM_DESTROYING); 2694 mutex_unlock(&id_priv->handler_mutex); 2695 cma_deref_id(id_priv); 2696 rdma_destroy_id(&id_priv->id); 2697 return; 2698 } 2699 out: 2700 mutex_unlock(&id_priv->handler_mutex); 2701 cma_deref_id(id_priv); 2702 } 2703 2704 static int cma_resolve_loopback(struct rdma_id_private *id_priv) 2705 { 2706 struct cma_work *work; 2707 union ib_gid gid; 2708 int ret; 2709 2710 work = kzalloc(sizeof *work, GFP_KERNEL); 2711 if (!work) 2712 return -ENOMEM; 2713 2714 if (!id_priv->cma_dev) { 2715 ret = cma_bind_loopback(id_priv); 2716 if (ret) 2717 goto err; 2718 } 2719 2720 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid); 2721 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid); 2722 2723 work->id = id_priv; 2724 INIT_WORK(&work->work, cma_work_handler); 2725 work->old_state = RDMA_CM_ADDR_QUERY; 2726 work->new_state = RDMA_CM_ADDR_RESOLVED; 2727 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED; 2728 queue_work(cma_wq, &work->work); 2729 return 0; 2730 err: 2731 kfree(work); 2732 return ret; 2733 } 2734 2735 static int cma_resolve_ib_addr(struct rdma_id_private *id_priv) 2736 { 2737 struct cma_work *work; 2738 int ret; 2739 2740 work = kzalloc(sizeof *work, GFP_KERNEL); 2741 if (!work) 2742 return -ENOMEM; 2743 2744 if (!id_priv->cma_dev) { 2745 ret = cma_resolve_ib_dev(id_priv); 2746 if (ret) 2747 goto err; 2748 } 2749 2750 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, (union ib_gid *) 2751 &(((struct sockaddr_ib *) &id_priv->id.route.addr.dst_addr)->sib_addr)); 2752 2753 work->id = id_priv; 2754 INIT_WORK(&work->work, cma_work_handler); 2755 work->old_state = RDMA_CM_ADDR_QUERY; 2756 work->new_state = RDMA_CM_ADDR_RESOLVED; 2757 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED; 2758 queue_work(cma_wq, &work->work); 2759 return 0; 2760 err: 2761 kfree(work); 2762 return ret; 2763 } 2764 2765 static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, 2766 struct sockaddr *dst_addr) 2767 { 2768 if (!src_addr || !src_addr->sa_family) { 2769 src_addr = (struct sockaddr *) &id->route.addr.src_addr; 2770 src_addr->sa_family = dst_addr->sa_family; 2771 if (dst_addr->sa_family == AF_INET6) { 2772 struct sockaddr_in6 *src_addr6 = (struct sockaddr_in6 *) src_addr; 2773 struct sockaddr_in6 *dst_addr6 = (struct sockaddr_in6 *) dst_addr; 2774 src_addr6->sin6_scope_id = dst_addr6->sin6_scope_id; 2775 if (ipv6_addr_type(&dst_addr6->sin6_addr) & IPV6_ADDR_LINKLOCAL) 2776 id->route.addr.dev_addr.bound_dev_if = dst_addr6->sin6_scope_id; 2777 } else if (dst_addr->sa_family == AF_IB) { 2778 ((struct sockaddr_ib *) src_addr)->sib_pkey = 2779 ((struct sockaddr_ib *) dst_addr)->sib_pkey; 2780 } 2781 } 2782 return rdma_bind_addr(id, src_addr); 2783 } 2784 2785 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, 2786 struct sockaddr *dst_addr, int timeout_ms) 2787 { 2788 struct rdma_id_private *id_priv; 2789 int ret; 2790 2791 id_priv = container_of(id, struct rdma_id_private, id); 2792 if (id_priv->state == RDMA_CM_IDLE) { 2793 ret = cma_bind_addr(id, src_addr, dst_addr); 2794 if (ret) 2795 return ret; 2796 } 2797 2798 if (cma_family(id_priv) != dst_addr->sa_family) 2799 return -EINVAL; 2800 2801 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY)) 2802 return -EINVAL; 2803 2804 atomic_inc(&id_priv->refcount); 2805 memcpy(cma_dst_addr(id_priv), dst_addr, rdma_addr_size(dst_addr)); 2806 if (cma_any_addr(dst_addr)) { 2807 ret = cma_resolve_loopback(id_priv); 2808 } else { 2809 if (dst_addr->sa_family == AF_IB) { 2810 ret = cma_resolve_ib_addr(id_priv); 2811 } else { 2812 ret = rdma_resolve_ip(&addr_client, cma_src_addr(id_priv), 2813 dst_addr, &id->route.addr.dev_addr, 2814 timeout_ms, addr_handler, id_priv); 2815 } 2816 } 2817 if (ret) 2818 goto err; 2819 2820 return 0; 2821 err: 2822 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND); 2823 cma_deref_id(id_priv); 2824 return ret; 2825 } 2826 EXPORT_SYMBOL(rdma_resolve_addr); 2827 2828 int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse) 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 (reuse || id_priv->state == RDMA_CM_IDLE) { 2837 id_priv->reuseaddr = reuse; 2838 ret = 0; 2839 } else { 2840 ret = -EINVAL; 2841 } 2842 spin_unlock_irqrestore(&id_priv->lock, flags); 2843 return ret; 2844 } 2845 EXPORT_SYMBOL(rdma_set_reuseaddr); 2846 2847 int rdma_set_afonly(struct rdma_cm_id *id, int afonly) 2848 { 2849 struct rdma_id_private *id_priv; 2850 unsigned long flags; 2851 int ret; 2852 2853 id_priv = container_of(id, struct rdma_id_private, id); 2854 spin_lock_irqsave(&id_priv->lock, flags); 2855 if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) { 2856 id_priv->options |= (1 << CMA_OPTION_AFONLY); 2857 id_priv->afonly = afonly; 2858 ret = 0; 2859 } else { 2860 ret = -EINVAL; 2861 } 2862 spin_unlock_irqrestore(&id_priv->lock, flags); 2863 return ret; 2864 } 2865 EXPORT_SYMBOL(rdma_set_afonly); 2866 2867 static void cma_bind_port(struct rdma_bind_list *bind_list, 2868 struct rdma_id_private *id_priv) 2869 { 2870 struct sockaddr *addr; 2871 struct sockaddr_ib *sib; 2872 u64 sid, mask; 2873 __be16 port; 2874 2875 addr = cma_src_addr(id_priv); 2876 port = htons(bind_list->port); 2877 2878 switch (addr->sa_family) { 2879 case AF_INET: 2880 ((struct sockaddr_in *) addr)->sin_port = port; 2881 break; 2882 case AF_INET6: 2883 ((struct sockaddr_in6 *) addr)->sin6_port = port; 2884 break; 2885 case AF_IB: 2886 sib = (struct sockaddr_ib *) addr; 2887 sid = be64_to_cpu(sib->sib_sid); 2888 mask = be64_to_cpu(sib->sib_sid_mask); 2889 sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port)); 2890 sib->sib_sid_mask = cpu_to_be64(~0ULL); 2891 break; 2892 } 2893 id_priv->bind_list = bind_list; 2894 hlist_add_head(&id_priv->node, &bind_list->owners); 2895 } 2896 2897 static int cma_alloc_port(enum rdma_port_space ps, 2898 struct rdma_id_private *id_priv, unsigned short snum) 2899 { 2900 struct rdma_bind_list *bind_list; 2901 int ret; 2902 2903 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL); 2904 if (!bind_list) 2905 return -ENOMEM; 2906 2907 ret = cma_ps_alloc(id_priv->id.route.addr.dev_addr.net, ps, bind_list, 2908 snum); 2909 if (ret < 0) 2910 goto err; 2911 2912 bind_list->ps = ps; 2913 bind_list->port = (unsigned short)ret; 2914 cma_bind_port(bind_list, id_priv); 2915 return 0; 2916 err: 2917 kfree(bind_list); 2918 return ret == -ENOSPC ? -EADDRNOTAVAIL : ret; 2919 } 2920 2921 static int cma_alloc_any_port(enum rdma_port_space ps, 2922 struct rdma_id_private *id_priv) 2923 { 2924 static unsigned int last_used_port; 2925 int low, high, remaining; 2926 unsigned int rover; 2927 struct net *net = id_priv->id.route.addr.dev_addr.net; 2928 2929 inet_get_local_port_range(net, &low, &high); 2930 remaining = (high - low) + 1; 2931 rover = prandom_u32() % remaining + low; 2932 retry: 2933 if (last_used_port != rover && 2934 !cma_ps_find(net, ps, (unsigned short)rover)) { 2935 int ret = cma_alloc_port(ps, id_priv, rover); 2936 /* 2937 * Remember previously used port number in order to avoid 2938 * re-using same port immediately after it is closed. 2939 */ 2940 if (!ret) 2941 last_used_port = rover; 2942 if (ret != -EADDRNOTAVAIL) 2943 return ret; 2944 } 2945 if (--remaining) { 2946 rover++; 2947 if ((rover < low) || (rover > high)) 2948 rover = low; 2949 goto retry; 2950 } 2951 return -EADDRNOTAVAIL; 2952 } 2953 2954 /* 2955 * Check that the requested port is available. This is called when trying to 2956 * bind to a specific port, or when trying to listen on a bound port. In 2957 * the latter case, the provided id_priv may already be on the bind_list, but 2958 * we still need to check that it's okay to start listening. 2959 */ 2960 static int cma_check_port(struct rdma_bind_list *bind_list, 2961 struct rdma_id_private *id_priv, uint8_t reuseaddr) 2962 { 2963 struct rdma_id_private *cur_id; 2964 struct sockaddr *addr, *cur_addr; 2965 2966 addr = cma_src_addr(id_priv); 2967 hlist_for_each_entry(cur_id, &bind_list->owners, node) { 2968 if (id_priv == cur_id) 2969 continue; 2970 2971 if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr && 2972 cur_id->reuseaddr) 2973 continue; 2974 2975 cur_addr = cma_src_addr(cur_id); 2976 if (id_priv->afonly && cur_id->afonly && 2977 (addr->sa_family != cur_addr->sa_family)) 2978 continue; 2979 2980 if (cma_any_addr(addr) || cma_any_addr(cur_addr)) 2981 return -EADDRNOTAVAIL; 2982 2983 if (!cma_addr_cmp(addr, cur_addr)) 2984 return -EADDRINUSE; 2985 } 2986 return 0; 2987 } 2988 2989 static int cma_use_port(enum rdma_port_space ps, 2990 struct rdma_id_private *id_priv) 2991 { 2992 struct rdma_bind_list *bind_list; 2993 unsigned short snum; 2994 int ret; 2995 2996 snum = ntohs(cma_port(cma_src_addr(id_priv))); 2997 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE)) 2998 return -EACCES; 2999 3000 bind_list = cma_ps_find(id_priv->id.route.addr.dev_addr.net, ps, snum); 3001 if (!bind_list) { 3002 ret = cma_alloc_port(ps, id_priv, snum); 3003 } else { 3004 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr); 3005 if (!ret) 3006 cma_bind_port(bind_list, id_priv); 3007 } 3008 return ret; 3009 } 3010 3011 static int cma_bind_listen(struct rdma_id_private *id_priv) 3012 { 3013 struct rdma_bind_list *bind_list = id_priv->bind_list; 3014 int ret = 0; 3015 3016 mutex_lock(&lock); 3017 if (bind_list->owners.first->next) 3018 ret = cma_check_port(bind_list, id_priv, 0); 3019 mutex_unlock(&lock); 3020 return ret; 3021 } 3022 3023 static enum rdma_port_space cma_select_inet_ps( 3024 struct rdma_id_private *id_priv) 3025 { 3026 switch (id_priv->id.ps) { 3027 case RDMA_PS_TCP: 3028 case RDMA_PS_UDP: 3029 case RDMA_PS_IPOIB: 3030 case RDMA_PS_IB: 3031 return id_priv->id.ps; 3032 default: 3033 3034 return 0; 3035 } 3036 } 3037 3038 static enum rdma_port_space cma_select_ib_ps(struct rdma_id_private *id_priv) 3039 { 3040 enum rdma_port_space ps = 0; 3041 struct sockaddr_ib *sib; 3042 u64 sid_ps, mask, sid; 3043 3044 sib = (struct sockaddr_ib *) cma_src_addr(id_priv); 3045 mask = be64_to_cpu(sib->sib_sid_mask) & RDMA_IB_IP_PS_MASK; 3046 sid = be64_to_cpu(sib->sib_sid) & mask; 3047 3048 if ((id_priv->id.ps == RDMA_PS_IB) && (sid == (RDMA_IB_IP_PS_IB & mask))) { 3049 sid_ps = RDMA_IB_IP_PS_IB; 3050 ps = RDMA_PS_IB; 3051 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_TCP)) && 3052 (sid == (RDMA_IB_IP_PS_TCP & mask))) { 3053 sid_ps = RDMA_IB_IP_PS_TCP; 3054 ps = RDMA_PS_TCP; 3055 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_UDP)) && 3056 (sid == (RDMA_IB_IP_PS_UDP & mask))) { 3057 sid_ps = RDMA_IB_IP_PS_UDP; 3058 ps = RDMA_PS_UDP; 3059 } 3060 3061 if (ps) { 3062 sib->sib_sid = cpu_to_be64(sid_ps | ntohs(cma_port((struct sockaddr *) sib))); 3063 sib->sib_sid_mask = cpu_to_be64(RDMA_IB_IP_PS_MASK | 3064 be64_to_cpu(sib->sib_sid_mask)); 3065 } 3066 return ps; 3067 } 3068 3069 static int cma_get_port(struct rdma_id_private *id_priv) 3070 { 3071 enum rdma_port_space ps; 3072 int ret; 3073 3074 if (cma_family(id_priv) != AF_IB) 3075 ps = cma_select_inet_ps(id_priv); 3076 else 3077 ps = cma_select_ib_ps(id_priv); 3078 if (!ps) 3079 return -EPROTONOSUPPORT; 3080 3081 mutex_lock(&lock); 3082 if (cma_any_port(cma_src_addr(id_priv))) 3083 ret = cma_alloc_any_port(ps, id_priv); 3084 else 3085 ret = cma_use_port(ps, id_priv); 3086 mutex_unlock(&lock); 3087 3088 return ret; 3089 } 3090 3091 static int cma_check_linklocal(struct rdma_dev_addr *dev_addr, 3092 struct sockaddr *addr) 3093 { 3094 #if IS_ENABLED(CONFIG_IPV6) 3095 struct sockaddr_in6 *sin6; 3096 3097 if (addr->sa_family != AF_INET6) 3098 return 0; 3099 3100 sin6 = (struct sockaddr_in6 *) addr; 3101 3102 if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)) 3103 return 0; 3104 3105 if (!sin6->sin6_scope_id) 3106 return -EINVAL; 3107 3108 dev_addr->bound_dev_if = sin6->sin6_scope_id; 3109 #endif 3110 return 0; 3111 } 3112 3113 int rdma_listen(struct rdma_cm_id *id, int backlog) 3114 { 3115 struct rdma_id_private *id_priv; 3116 int ret; 3117 3118 id_priv = container_of(id, struct rdma_id_private, id); 3119 if (id_priv->state == RDMA_CM_IDLE) { 3120 id->route.addr.src_addr.ss_family = AF_INET; 3121 ret = rdma_bind_addr(id, cma_src_addr(id_priv)); 3122 if (ret) 3123 return ret; 3124 } 3125 3126 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN)) 3127 return -EINVAL; 3128 3129 if (id_priv->reuseaddr) { 3130 ret = cma_bind_listen(id_priv); 3131 if (ret) 3132 goto err; 3133 } 3134 3135 id_priv->backlog = backlog; 3136 if (id->device) { 3137 if (rdma_cap_ib_cm(id->device, 1)) { 3138 ret = cma_ib_listen(id_priv); 3139 if (ret) 3140 goto err; 3141 } else if (rdma_cap_iw_cm(id->device, 1)) { 3142 ret = cma_iw_listen(id_priv, backlog); 3143 if (ret) 3144 goto err; 3145 } else { 3146 ret = -ENOSYS; 3147 goto err; 3148 } 3149 } else 3150 cma_listen_on_all(id_priv); 3151 3152 return 0; 3153 err: 3154 id_priv->backlog = 0; 3155 cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND); 3156 return ret; 3157 } 3158 EXPORT_SYMBOL(rdma_listen); 3159 3160 int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr) 3161 { 3162 struct rdma_id_private *id_priv; 3163 int ret; 3164 3165 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6 && 3166 addr->sa_family != AF_IB) 3167 return -EAFNOSUPPORT; 3168 3169 id_priv = container_of(id, struct rdma_id_private, id); 3170 if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND)) 3171 return -EINVAL; 3172 3173 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr); 3174 if (ret) 3175 goto err1; 3176 3177 memcpy(cma_src_addr(id_priv), addr, rdma_addr_size(addr)); 3178 if (!cma_any_addr(addr)) { 3179 ret = cma_translate_addr(addr, &id->route.addr.dev_addr); 3180 if (ret) 3181 goto err1; 3182 3183 ret = cma_acquire_dev(id_priv, NULL); 3184 if (ret) 3185 goto err1; 3186 } 3187 3188 if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) { 3189 if (addr->sa_family == AF_INET) 3190 id_priv->afonly = 1; 3191 #if IS_ENABLED(CONFIG_IPV6) 3192 else if (addr->sa_family == AF_INET6) { 3193 struct net *net = id_priv->id.route.addr.dev_addr.net; 3194 3195 id_priv->afonly = net->ipv6.sysctl.bindv6only; 3196 } 3197 #endif 3198 } 3199 ret = cma_get_port(id_priv); 3200 if (ret) 3201 goto err2; 3202 3203 return 0; 3204 err2: 3205 if (id_priv->cma_dev) 3206 cma_release_dev(id_priv); 3207 err1: 3208 cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE); 3209 return ret; 3210 } 3211 EXPORT_SYMBOL(rdma_bind_addr); 3212 3213 static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv) 3214 { 3215 struct cma_hdr *cma_hdr; 3216 3217 cma_hdr = hdr; 3218 cma_hdr->cma_version = CMA_VERSION; 3219 if (cma_family(id_priv) == AF_INET) { 3220 struct sockaddr_in *src4, *dst4; 3221 3222 src4 = (struct sockaddr_in *) cma_src_addr(id_priv); 3223 dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv); 3224 3225 cma_set_ip_ver(cma_hdr, 4); 3226 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; 3227 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; 3228 cma_hdr->port = src4->sin_port; 3229 } else if (cma_family(id_priv) == AF_INET6) { 3230 struct sockaddr_in6 *src6, *dst6; 3231 3232 src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv); 3233 dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv); 3234 3235 cma_set_ip_ver(cma_hdr, 6); 3236 cma_hdr->src_addr.ip6 = src6->sin6_addr; 3237 cma_hdr->dst_addr.ip6 = dst6->sin6_addr; 3238 cma_hdr->port = src6->sin6_port; 3239 } 3240 return 0; 3241 } 3242 3243 static int cma_sidr_rep_handler(struct ib_cm_id *cm_id, 3244 struct ib_cm_event *ib_event) 3245 { 3246 struct rdma_id_private *id_priv = cm_id->context; 3247 struct rdma_cm_event event; 3248 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd; 3249 int ret = 0; 3250 3251 mutex_lock(&id_priv->handler_mutex); 3252 if (id_priv->state != RDMA_CM_CONNECT) 3253 goto out; 3254 3255 memset(&event, 0, sizeof event); 3256 switch (ib_event->event) { 3257 case IB_CM_SIDR_REQ_ERROR: 3258 event.event = RDMA_CM_EVENT_UNREACHABLE; 3259 event.status = -ETIMEDOUT; 3260 break; 3261 case IB_CM_SIDR_REP_RECEIVED: 3262 event.param.ud.private_data = ib_event->private_data; 3263 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE; 3264 if (rep->status != IB_SIDR_SUCCESS) { 3265 event.event = RDMA_CM_EVENT_UNREACHABLE; 3266 event.status = ib_event->param.sidr_rep_rcvd.status; 3267 break; 3268 } 3269 ret = cma_set_qkey(id_priv, rep->qkey); 3270 if (ret) { 3271 event.event = RDMA_CM_EVENT_ADDR_ERROR; 3272 event.status = ret; 3273 break; 3274 } 3275 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num, 3276 id_priv->id.route.path_rec, 3277 &event.param.ud.ah_attr); 3278 event.param.ud.qp_num = rep->qpn; 3279 event.param.ud.qkey = rep->qkey; 3280 event.event = RDMA_CM_EVENT_ESTABLISHED; 3281 event.status = 0; 3282 break; 3283 default: 3284 pr_err("RDMA CMA: unexpected IB CM event: %d\n", 3285 ib_event->event); 3286 goto out; 3287 } 3288 3289 ret = id_priv->id.event_handler(&id_priv->id, &event); 3290 if (ret) { 3291 /* Destroy the CM ID by returning a non-zero value. */ 3292 id_priv->cm_id.ib = NULL; 3293 cma_exch(id_priv, RDMA_CM_DESTROYING); 3294 mutex_unlock(&id_priv->handler_mutex); 3295 rdma_destroy_id(&id_priv->id); 3296 return ret; 3297 } 3298 out: 3299 mutex_unlock(&id_priv->handler_mutex); 3300 return ret; 3301 } 3302 3303 static int cma_resolve_ib_udp(struct rdma_id_private *id_priv, 3304 struct rdma_conn_param *conn_param) 3305 { 3306 struct ib_cm_sidr_req_param req; 3307 struct ib_cm_id *id; 3308 void *private_data; 3309 int offset, ret; 3310 3311 memset(&req, 0, sizeof req); 3312 offset = cma_user_data_offset(id_priv); 3313 req.private_data_len = offset + conn_param->private_data_len; 3314 if (req.private_data_len < conn_param->private_data_len) 3315 return -EINVAL; 3316 3317 if (req.private_data_len) { 3318 private_data = kzalloc(req.private_data_len, GFP_ATOMIC); 3319 if (!private_data) 3320 return -ENOMEM; 3321 } else { 3322 private_data = NULL; 3323 } 3324 3325 if (conn_param->private_data && conn_param->private_data_len) 3326 memcpy(private_data + offset, conn_param->private_data, 3327 conn_param->private_data_len); 3328 3329 if (private_data) { 3330 ret = cma_format_hdr(private_data, id_priv); 3331 if (ret) 3332 goto out; 3333 req.private_data = private_data; 3334 } 3335 3336 id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler, 3337 id_priv); 3338 if (IS_ERR(id)) { 3339 ret = PTR_ERR(id); 3340 goto out; 3341 } 3342 id_priv->cm_id.ib = id; 3343 3344 req.path = id_priv->id.route.path_rec; 3345 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv)); 3346 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8); 3347 req.max_cm_retries = CMA_MAX_CM_RETRIES; 3348 3349 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req); 3350 if (ret) { 3351 ib_destroy_cm_id(id_priv->cm_id.ib); 3352 id_priv->cm_id.ib = NULL; 3353 } 3354 out: 3355 kfree(private_data); 3356 return ret; 3357 } 3358 3359 static int cma_connect_ib(struct rdma_id_private *id_priv, 3360 struct rdma_conn_param *conn_param) 3361 { 3362 struct ib_cm_req_param req; 3363 struct rdma_route *route; 3364 void *private_data; 3365 struct ib_cm_id *id; 3366 int offset, ret; 3367 3368 memset(&req, 0, sizeof req); 3369 offset = cma_user_data_offset(id_priv); 3370 req.private_data_len = offset + conn_param->private_data_len; 3371 if (req.private_data_len < conn_param->private_data_len) 3372 return -EINVAL; 3373 3374 if (req.private_data_len) { 3375 private_data = kzalloc(req.private_data_len, GFP_ATOMIC); 3376 if (!private_data) 3377 return -ENOMEM; 3378 } else { 3379 private_data = NULL; 3380 } 3381 3382 if (conn_param->private_data && conn_param->private_data_len) 3383 memcpy(private_data + offset, conn_param->private_data, 3384 conn_param->private_data_len); 3385 3386 id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv); 3387 if (IS_ERR(id)) { 3388 ret = PTR_ERR(id); 3389 goto out; 3390 } 3391 id_priv->cm_id.ib = id; 3392 3393 route = &id_priv->id.route; 3394 if (private_data) { 3395 ret = cma_format_hdr(private_data, id_priv); 3396 if (ret) 3397 goto out; 3398 req.private_data = private_data; 3399 } 3400 3401 req.primary_path = &route->path_rec[0]; 3402 if (route->num_paths == 2) 3403 req.alternate_path = &route->path_rec[1]; 3404 3405 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv)); 3406 req.qp_num = id_priv->qp_num; 3407 req.qp_type = id_priv->id.qp_type; 3408 req.starting_psn = id_priv->seq_num; 3409 req.responder_resources = conn_param->responder_resources; 3410 req.initiator_depth = conn_param->initiator_depth; 3411 req.flow_control = conn_param->flow_control; 3412 req.retry_count = min_t(u8, 7, conn_param->retry_count); 3413 req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count); 3414 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; 3415 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; 3416 req.max_cm_retries = CMA_MAX_CM_RETRIES; 3417 req.srq = id_priv->srq ? 1 : 0; 3418 3419 ret = ib_send_cm_req(id_priv->cm_id.ib, &req); 3420 out: 3421 if (ret && !IS_ERR(id)) { 3422 ib_destroy_cm_id(id); 3423 id_priv->cm_id.ib = NULL; 3424 } 3425 3426 kfree(private_data); 3427 return ret; 3428 } 3429 3430 static int cma_connect_iw(struct rdma_id_private *id_priv, 3431 struct rdma_conn_param *conn_param) 3432 { 3433 struct iw_cm_id *cm_id; 3434 int ret; 3435 struct iw_cm_conn_param iw_param; 3436 3437 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv); 3438 if (IS_ERR(cm_id)) 3439 return PTR_ERR(cm_id); 3440 3441 cm_id->tos = id_priv->tos; 3442 id_priv->cm_id.iw = cm_id; 3443 3444 memcpy(&cm_id->local_addr, cma_src_addr(id_priv), 3445 rdma_addr_size(cma_src_addr(id_priv))); 3446 memcpy(&cm_id->remote_addr, cma_dst_addr(id_priv), 3447 rdma_addr_size(cma_dst_addr(id_priv))); 3448 3449 ret = cma_modify_qp_rtr(id_priv, conn_param); 3450 if (ret) 3451 goto out; 3452 3453 if (conn_param) { 3454 iw_param.ord = conn_param->initiator_depth; 3455 iw_param.ird = conn_param->responder_resources; 3456 iw_param.private_data = conn_param->private_data; 3457 iw_param.private_data_len = conn_param->private_data_len; 3458 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num; 3459 } else { 3460 memset(&iw_param, 0, sizeof iw_param); 3461 iw_param.qpn = id_priv->qp_num; 3462 } 3463 ret = iw_cm_connect(cm_id, &iw_param); 3464 out: 3465 if (ret) { 3466 iw_destroy_cm_id(cm_id); 3467 id_priv->cm_id.iw = NULL; 3468 } 3469 return ret; 3470 } 3471 3472 int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) 3473 { 3474 struct rdma_id_private *id_priv; 3475 int ret; 3476 3477 id_priv = container_of(id, struct rdma_id_private, id); 3478 if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT)) 3479 return -EINVAL; 3480 3481 if (!id->qp) { 3482 id_priv->qp_num = conn_param->qp_num; 3483 id_priv->srq = conn_param->srq; 3484 } 3485 3486 if (rdma_cap_ib_cm(id->device, id->port_num)) { 3487 if (id->qp_type == IB_QPT_UD) 3488 ret = cma_resolve_ib_udp(id_priv, conn_param); 3489 else 3490 ret = cma_connect_ib(id_priv, conn_param); 3491 } else if (rdma_cap_iw_cm(id->device, id->port_num)) 3492 ret = cma_connect_iw(id_priv, conn_param); 3493 else 3494 ret = -ENOSYS; 3495 if (ret) 3496 goto err; 3497 3498 return 0; 3499 err: 3500 cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED); 3501 return ret; 3502 } 3503 EXPORT_SYMBOL(rdma_connect); 3504 3505 static int cma_accept_ib(struct rdma_id_private *id_priv, 3506 struct rdma_conn_param *conn_param) 3507 { 3508 struct ib_cm_rep_param rep; 3509 int ret; 3510 3511 ret = cma_modify_qp_rtr(id_priv, conn_param); 3512 if (ret) 3513 goto out; 3514 3515 ret = cma_modify_qp_rts(id_priv, conn_param); 3516 if (ret) 3517 goto out; 3518 3519 memset(&rep, 0, sizeof rep); 3520 rep.qp_num = id_priv->qp_num; 3521 rep.starting_psn = id_priv->seq_num; 3522 rep.private_data = conn_param->private_data; 3523 rep.private_data_len = conn_param->private_data_len; 3524 rep.responder_resources = conn_param->responder_resources; 3525 rep.initiator_depth = conn_param->initiator_depth; 3526 rep.failover_accepted = 0; 3527 rep.flow_control = conn_param->flow_control; 3528 rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count); 3529 rep.srq = id_priv->srq ? 1 : 0; 3530 3531 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep); 3532 out: 3533 return ret; 3534 } 3535 3536 static int cma_accept_iw(struct rdma_id_private *id_priv, 3537 struct rdma_conn_param *conn_param) 3538 { 3539 struct iw_cm_conn_param iw_param; 3540 int ret; 3541 3542 ret = cma_modify_qp_rtr(id_priv, conn_param); 3543 if (ret) 3544 return ret; 3545 3546 iw_param.ord = conn_param->initiator_depth; 3547 iw_param.ird = conn_param->responder_resources; 3548 iw_param.private_data = conn_param->private_data; 3549 iw_param.private_data_len = conn_param->private_data_len; 3550 if (id_priv->id.qp) { 3551 iw_param.qpn = id_priv->qp_num; 3552 } else 3553 iw_param.qpn = conn_param->qp_num; 3554 3555 return iw_cm_accept(id_priv->cm_id.iw, &iw_param); 3556 } 3557 3558 static int cma_send_sidr_rep(struct rdma_id_private *id_priv, 3559 enum ib_cm_sidr_status status, u32 qkey, 3560 const void *private_data, int private_data_len) 3561 { 3562 struct ib_cm_sidr_rep_param rep; 3563 int ret; 3564 3565 memset(&rep, 0, sizeof rep); 3566 rep.status = status; 3567 if (status == IB_SIDR_SUCCESS) { 3568 ret = cma_set_qkey(id_priv, qkey); 3569 if (ret) 3570 return ret; 3571 rep.qp_num = id_priv->qp_num; 3572 rep.qkey = id_priv->qkey; 3573 } 3574 rep.private_data = private_data; 3575 rep.private_data_len = private_data_len; 3576 3577 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep); 3578 } 3579 3580 int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) 3581 { 3582 struct rdma_id_private *id_priv; 3583 int ret; 3584 3585 id_priv = container_of(id, struct rdma_id_private, id); 3586 3587 id_priv->owner = task_pid_nr(current); 3588 3589 if (!cma_comp(id_priv, RDMA_CM_CONNECT)) 3590 return -EINVAL; 3591 3592 if (!id->qp && conn_param) { 3593 id_priv->qp_num = conn_param->qp_num; 3594 id_priv->srq = conn_param->srq; 3595 } 3596 3597 if (rdma_cap_ib_cm(id->device, id->port_num)) { 3598 if (id->qp_type == IB_QPT_UD) { 3599 if (conn_param) 3600 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS, 3601 conn_param->qkey, 3602 conn_param->private_data, 3603 conn_param->private_data_len); 3604 else 3605 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS, 3606 0, NULL, 0); 3607 } else { 3608 if (conn_param) 3609 ret = cma_accept_ib(id_priv, conn_param); 3610 else 3611 ret = cma_rep_recv(id_priv); 3612 } 3613 } else if (rdma_cap_iw_cm(id->device, id->port_num)) 3614 ret = cma_accept_iw(id_priv, conn_param); 3615 else 3616 ret = -ENOSYS; 3617 3618 if (ret) 3619 goto reject; 3620 3621 return 0; 3622 reject: 3623 cma_modify_qp_err(id_priv); 3624 rdma_reject(id, NULL, 0); 3625 return ret; 3626 } 3627 EXPORT_SYMBOL(rdma_accept); 3628 3629 int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event) 3630 { 3631 struct rdma_id_private *id_priv; 3632 int ret; 3633 3634 id_priv = container_of(id, struct rdma_id_private, id); 3635 if (!id_priv->cm_id.ib) 3636 return -EINVAL; 3637 3638 switch (id->device->node_type) { 3639 case RDMA_NODE_IB_CA: 3640 ret = ib_cm_notify(id_priv->cm_id.ib, event); 3641 break; 3642 default: 3643 ret = 0; 3644 break; 3645 } 3646 return ret; 3647 } 3648 EXPORT_SYMBOL(rdma_notify); 3649 3650 int rdma_reject(struct rdma_cm_id *id, const void *private_data, 3651 u8 private_data_len) 3652 { 3653 struct rdma_id_private *id_priv; 3654 int ret; 3655 3656 id_priv = container_of(id, struct rdma_id_private, id); 3657 if (!id_priv->cm_id.ib) 3658 return -EINVAL; 3659 3660 if (rdma_cap_ib_cm(id->device, id->port_num)) { 3661 if (id->qp_type == IB_QPT_UD) 3662 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0, 3663 private_data, private_data_len); 3664 else 3665 ret = ib_send_cm_rej(id_priv->cm_id.ib, 3666 IB_CM_REJ_CONSUMER_DEFINED, NULL, 3667 0, private_data, private_data_len); 3668 } else if (rdma_cap_iw_cm(id->device, id->port_num)) { 3669 ret = iw_cm_reject(id_priv->cm_id.iw, 3670 private_data, private_data_len); 3671 } else 3672 ret = -ENOSYS; 3673 3674 return ret; 3675 } 3676 EXPORT_SYMBOL(rdma_reject); 3677 3678 int rdma_disconnect(struct rdma_cm_id *id) 3679 { 3680 struct rdma_id_private *id_priv; 3681 int ret; 3682 3683 id_priv = container_of(id, struct rdma_id_private, id); 3684 if (!id_priv->cm_id.ib) 3685 return -EINVAL; 3686 3687 if (rdma_cap_ib_cm(id->device, id->port_num)) { 3688 ret = cma_modify_qp_err(id_priv); 3689 if (ret) 3690 goto out; 3691 /* Initiate or respond to a disconnect. */ 3692 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0)) 3693 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0); 3694 } else if (rdma_cap_iw_cm(id->device, id->port_num)) { 3695 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0); 3696 } else 3697 ret = -EINVAL; 3698 3699 out: 3700 return ret; 3701 } 3702 EXPORT_SYMBOL(rdma_disconnect); 3703 3704 static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast) 3705 { 3706 struct rdma_id_private *id_priv; 3707 struct cma_multicast *mc = multicast->context; 3708 struct rdma_cm_event event; 3709 int ret = 0; 3710 3711 id_priv = mc->id_priv; 3712 mutex_lock(&id_priv->handler_mutex); 3713 if (id_priv->state != RDMA_CM_ADDR_BOUND && 3714 id_priv->state != RDMA_CM_ADDR_RESOLVED) 3715 goto out; 3716 3717 if (!status) 3718 status = cma_set_qkey(id_priv, be32_to_cpu(multicast->rec.qkey)); 3719 mutex_lock(&id_priv->qp_mutex); 3720 if (!status && id_priv->id.qp) 3721 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid, 3722 be16_to_cpu(multicast->rec.mlid)); 3723 mutex_unlock(&id_priv->qp_mutex); 3724 3725 memset(&event, 0, sizeof event); 3726 event.status = status; 3727 event.param.ud.private_data = mc->context; 3728 if (!status) { 3729 struct rdma_dev_addr *dev_addr = 3730 &id_priv->id.route.addr.dev_addr; 3731 struct net_device *ndev = 3732 dev_get_by_index(&init_net, dev_addr->bound_dev_if); 3733 enum ib_gid_type gid_type = 3734 id_priv->cma_dev->default_gid_type[id_priv->id.port_num - 3735 rdma_start_port(id_priv->cma_dev->device)]; 3736 3737 event.event = RDMA_CM_EVENT_MULTICAST_JOIN; 3738 ib_init_ah_from_mcmember(id_priv->id.device, 3739 id_priv->id.port_num, &multicast->rec, 3740 ndev, gid_type, 3741 &event.param.ud.ah_attr); 3742 event.param.ud.qp_num = 0xFFFFFF; 3743 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey); 3744 if (ndev) 3745 dev_put(ndev); 3746 } else 3747 event.event = RDMA_CM_EVENT_MULTICAST_ERROR; 3748 3749 ret = id_priv->id.event_handler(&id_priv->id, &event); 3750 if (ret) { 3751 cma_exch(id_priv, RDMA_CM_DESTROYING); 3752 mutex_unlock(&id_priv->handler_mutex); 3753 rdma_destroy_id(&id_priv->id); 3754 return 0; 3755 } 3756 3757 out: 3758 mutex_unlock(&id_priv->handler_mutex); 3759 return 0; 3760 } 3761 3762 static void cma_set_mgid(struct rdma_id_private *id_priv, 3763 struct sockaddr *addr, union ib_gid *mgid) 3764 { 3765 unsigned char mc_map[MAX_ADDR_LEN]; 3766 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 3767 struct sockaddr_in *sin = (struct sockaddr_in *) addr; 3768 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr; 3769 3770 if (cma_any_addr(addr)) { 3771 memset(mgid, 0, sizeof *mgid); 3772 } else if ((addr->sa_family == AF_INET6) && 3773 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) == 3774 0xFF10A01B)) { 3775 /* IPv6 address is an SA assigned MGID. */ 3776 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid); 3777 } else if (addr->sa_family == AF_IB) { 3778 memcpy(mgid, &((struct sockaddr_ib *) addr)->sib_addr, sizeof *mgid); 3779 } else if ((addr->sa_family == AF_INET6)) { 3780 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map); 3781 if (id_priv->id.ps == RDMA_PS_UDP) 3782 mc_map[7] = 0x01; /* Use RDMA CM signature */ 3783 *mgid = *(union ib_gid *) (mc_map + 4); 3784 } else { 3785 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map); 3786 if (id_priv->id.ps == RDMA_PS_UDP) 3787 mc_map[7] = 0x01; /* Use RDMA CM signature */ 3788 *mgid = *(union ib_gid *) (mc_map + 4); 3789 } 3790 } 3791 3792 static void cma_query_sa_classport_info_cb(int status, 3793 struct ib_class_port_info *rec, 3794 void *context) 3795 { 3796 struct class_port_info_context *cb_ctx = context; 3797 3798 WARN_ON(!context); 3799 3800 if (status || !rec) { 3801 pr_debug("RDMA CM: %s port %u failed query ClassPortInfo status: %d\n", 3802 cb_ctx->device->name, cb_ctx->port_num, status); 3803 goto out; 3804 } 3805 3806 memcpy(cb_ctx->class_port_info, rec, sizeof(struct ib_class_port_info)); 3807 3808 out: 3809 complete(&cb_ctx->done); 3810 } 3811 3812 static int cma_query_sa_classport_info(struct ib_device *device, u8 port_num, 3813 struct ib_class_port_info *class_port_info) 3814 { 3815 struct class_port_info_context *cb_ctx; 3816 int ret; 3817 3818 cb_ctx = kmalloc(sizeof(*cb_ctx), GFP_KERNEL); 3819 if (!cb_ctx) 3820 return -ENOMEM; 3821 3822 cb_ctx->device = device; 3823 cb_ctx->class_port_info = class_port_info; 3824 cb_ctx->port_num = port_num; 3825 init_completion(&cb_ctx->done); 3826 3827 ret = ib_sa_classport_info_rec_query(&sa_client, device, port_num, 3828 CMA_QUERY_CLASSPORT_INFO_TIMEOUT, 3829 GFP_KERNEL, cma_query_sa_classport_info_cb, 3830 cb_ctx, &cb_ctx->sa_query); 3831 if (ret < 0) { 3832 pr_err("RDMA CM: %s port %u failed to send ClassPortInfo query, ret: %d\n", 3833 device->name, port_num, ret); 3834 goto out; 3835 } 3836 3837 wait_for_completion(&cb_ctx->done); 3838 3839 out: 3840 kfree(cb_ctx); 3841 return ret; 3842 } 3843 3844 static int cma_join_ib_multicast(struct rdma_id_private *id_priv, 3845 struct cma_multicast *mc) 3846 { 3847 struct ib_sa_mcmember_rec rec; 3848 struct ib_class_port_info class_port_info; 3849 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 3850 ib_sa_comp_mask comp_mask; 3851 int ret; 3852 3853 ib_addr_get_mgid(dev_addr, &rec.mgid); 3854 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num, 3855 &rec.mgid, &rec); 3856 if (ret) 3857 return ret; 3858 3859 ret = cma_set_qkey(id_priv, 0); 3860 if (ret) 3861 return ret; 3862 3863 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid); 3864 rec.qkey = cpu_to_be32(id_priv->qkey); 3865 rdma_addr_get_sgid(dev_addr, &rec.port_gid); 3866 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); 3867 rec.join_state = mc->join_state; 3868 3869 if (rec.join_state == BIT(SENDONLY_FULLMEMBER_JOIN)) { 3870 ret = cma_query_sa_classport_info(id_priv->id.device, 3871 id_priv->id.port_num, 3872 &class_port_info); 3873 3874 if (ret) 3875 return ret; 3876 3877 if (!(ib_get_cpi_capmask2(&class_port_info) & 3878 IB_SA_CAP_MASK2_SENDONLY_FULL_MEM_SUPPORT)) { 3879 pr_warn("RDMA CM: %s port %u Unable to multicast join\n" 3880 "RDMA CM: SM doesn't support Send Only Full Member option\n", 3881 id_priv->id.device->name, id_priv->id.port_num); 3882 return -EOPNOTSUPP; 3883 } 3884 } 3885 3886 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID | 3887 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE | 3888 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL | 3889 IB_SA_MCMEMBER_REC_FLOW_LABEL | 3890 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS; 3891 3892 if (id_priv->id.ps == RDMA_PS_IPOIB) 3893 comp_mask |= IB_SA_MCMEMBER_REC_RATE | 3894 IB_SA_MCMEMBER_REC_RATE_SELECTOR | 3895 IB_SA_MCMEMBER_REC_MTU_SELECTOR | 3896 IB_SA_MCMEMBER_REC_MTU | 3897 IB_SA_MCMEMBER_REC_HOP_LIMIT; 3898 3899 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device, 3900 id_priv->id.port_num, &rec, 3901 comp_mask, GFP_KERNEL, 3902 cma_ib_mc_handler, mc); 3903 return PTR_ERR_OR_ZERO(mc->multicast.ib); 3904 } 3905 3906 static void iboe_mcast_work_handler(struct work_struct *work) 3907 { 3908 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work); 3909 struct cma_multicast *mc = mw->mc; 3910 struct ib_sa_multicast *m = mc->multicast.ib; 3911 3912 mc->multicast.ib->context = mc; 3913 cma_ib_mc_handler(0, m); 3914 kref_put(&mc->mcref, release_mc); 3915 kfree(mw); 3916 } 3917 3918 static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid) 3919 { 3920 struct sockaddr_in *sin = (struct sockaddr_in *)addr; 3921 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr; 3922 3923 if (cma_any_addr(addr)) { 3924 memset(mgid, 0, sizeof *mgid); 3925 } else if (addr->sa_family == AF_INET6) { 3926 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid); 3927 } else { 3928 mgid->raw[0] = 0xff; 3929 mgid->raw[1] = 0x0e; 3930 mgid->raw[2] = 0; 3931 mgid->raw[3] = 0; 3932 mgid->raw[4] = 0; 3933 mgid->raw[5] = 0; 3934 mgid->raw[6] = 0; 3935 mgid->raw[7] = 0; 3936 mgid->raw[8] = 0; 3937 mgid->raw[9] = 0; 3938 mgid->raw[10] = 0xff; 3939 mgid->raw[11] = 0xff; 3940 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr; 3941 } 3942 } 3943 3944 static int cma_iboe_join_multicast(struct rdma_id_private *id_priv, 3945 struct cma_multicast *mc) 3946 { 3947 struct iboe_mcast_work *work; 3948 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 3949 int err = 0; 3950 struct sockaddr *addr = (struct sockaddr *)&mc->addr; 3951 struct net_device *ndev = NULL; 3952 enum ib_gid_type gid_type; 3953 bool send_only; 3954 3955 send_only = mc->join_state == BIT(SENDONLY_FULLMEMBER_JOIN); 3956 3957 if (cma_zero_addr((struct sockaddr *)&mc->addr)) 3958 return -EINVAL; 3959 3960 work = kzalloc(sizeof *work, GFP_KERNEL); 3961 if (!work) 3962 return -ENOMEM; 3963 3964 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL); 3965 if (!mc->multicast.ib) { 3966 err = -ENOMEM; 3967 goto out1; 3968 } 3969 3970 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid); 3971 3972 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff); 3973 if (id_priv->id.ps == RDMA_PS_UDP) 3974 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY); 3975 3976 if (dev_addr->bound_dev_if) 3977 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if); 3978 if (!ndev) { 3979 err = -ENODEV; 3980 goto out2; 3981 } 3982 mc->multicast.ib->rec.rate = iboe_get_rate(ndev); 3983 mc->multicast.ib->rec.hop_limit = 1; 3984 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu); 3985 3986 gid_type = id_priv->cma_dev->default_gid_type[id_priv->id.port_num - 3987 rdma_start_port(id_priv->cma_dev->device)]; 3988 if (addr->sa_family == AF_INET) { 3989 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) { 3990 mc->multicast.ib->rec.hop_limit = IPV6_DEFAULT_HOPLIMIT; 3991 if (!send_only) { 3992 err = cma_igmp_send(ndev, &mc->multicast.ib->rec.mgid, 3993 true); 3994 if (!err) 3995 mc->igmp_joined = true; 3996 } 3997 } 3998 } else { 3999 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) 4000 err = -ENOTSUPP; 4001 } 4002 dev_put(ndev); 4003 if (err || !mc->multicast.ib->rec.mtu) { 4004 if (!err) 4005 err = -EINVAL; 4006 goto out2; 4007 } 4008 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr, 4009 &mc->multicast.ib->rec.port_gid); 4010 work->id = id_priv; 4011 work->mc = mc; 4012 INIT_WORK(&work->work, iboe_mcast_work_handler); 4013 kref_get(&mc->mcref); 4014 queue_work(cma_wq, &work->work); 4015 4016 return 0; 4017 4018 out2: 4019 kfree(mc->multicast.ib); 4020 out1: 4021 kfree(work); 4022 return err; 4023 } 4024 4025 int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr, 4026 u8 join_state, void *context) 4027 { 4028 struct rdma_id_private *id_priv; 4029 struct cma_multicast *mc; 4030 int ret; 4031 4032 id_priv = container_of(id, struct rdma_id_private, id); 4033 if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) && 4034 !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED)) 4035 return -EINVAL; 4036 4037 mc = kmalloc(sizeof *mc, GFP_KERNEL); 4038 if (!mc) 4039 return -ENOMEM; 4040 4041 memcpy(&mc->addr, addr, rdma_addr_size(addr)); 4042 mc->context = context; 4043 mc->id_priv = id_priv; 4044 mc->igmp_joined = false; 4045 mc->join_state = join_state; 4046 spin_lock(&id_priv->lock); 4047 list_add(&mc->list, &id_priv->mc_list); 4048 spin_unlock(&id_priv->lock); 4049 4050 if (rdma_protocol_roce(id->device, id->port_num)) { 4051 kref_init(&mc->mcref); 4052 ret = cma_iboe_join_multicast(id_priv, mc); 4053 } else if (rdma_cap_ib_mcast(id->device, id->port_num)) 4054 ret = cma_join_ib_multicast(id_priv, mc); 4055 else 4056 ret = -ENOSYS; 4057 4058 if (ret) { 4059 spin_lock_irq(&id_priv->lock); 4060 list_del(&mc->list); 4061 spin_unlock_irq(&id_priv->lock); 4062 kfree(mc); 4063 } 4064 return ret; 4065 } 4066 EXPORT_SYMBOL(rdma_join_multicast); 4067 4068 void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr) 4069 { 4070 struct rdma_id_private *id_priv; 4071 struct cma_multicast *mc; 4072 4073 id_priv = container_of(id, struct rdma_id_private, id); 4074 spin_lock_irq(&id_priv->lock); 4075 list_for_each_entry(mc, &id_priv->mc_list, list) { 4076 if (!memcmp(&mc->addr, addr, rdma_addr_size(addr))) { 4077 list_del(&mc->list); 4078 spin_unlock_irq(&id_priv->lock); 4079 4080 if (id->qp) 4081 ib_detach_mcast(id->qp, 4082 &mc->multicast.ib->rec.mgid, 4083 be16_to_cpu(mc->multicast.ib->rec.mlid)); 4084 4085 BUG_ON(id_priv->cma_dev->device != id->device); 4086 4087 if (rdma_cap_ib_mcast(id->device, id->port_num)) { 4088 ib_sa_free_multicast(mc->multicast.ib); 4089 kfree(mc); 4090 } else if (rdma_protocol_roce(id->device, id->port_num)) { 4091 if (mc->igmp_joined) { 4092 struct rdma_dev_addr *dev_addr = 4093 &id->route.addr.dev_addr; 4094 struct net_device *ndev = NULL; 4095 4096 if (dev_addr->bound_dev_if) 4097 ndev = dev_get_by_index(&init_net, 4098 dev_addr->bound_dev_if); 4099 if (ndev) { 4100 cma_igmp_send(ndev, 4101 &mc->multicast.ib->rec.mgid, 4102 false); 4103 dev_put(ndev); 4104 } 4105 mc->igmp_joined = false; 4106 } 4107 kref_put(&mc->mcref, release_mc); 4108 } 4109 return; 4110 } 4111 } 4112 spin_unlock_irq(&id_priv->lock); 4113 } 4114 EXPORT_SYMBOL(rdma_leave_multicast); 4115 4116 static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv) 4117 { 4118 struct rdma_dev_addr *dev_addr; 4119 struct cma_ndev_work *work; 4120 4121 dev_addr = &id_priv->id.route.addr.dev_addr; 4122 4123 if ((dev_addr->bound_dev_if == ndev->ifindex) && 4124 (net_eq(dev_net(ndev), dev_addr->net)) && 4125 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) { 4126 pr_info("RDMA CM addr change for ndev %s used by id %p\n", 4127 ndev->name, &id_priv->id); 4128 work = kzalloc(sizeof *work, GFP_KERNEL); 4129 if (!work) 4130 return -ENOMEM; 4131 4132 INIT_WORK(&work->work, cma_ndev_work_handler); 4133 work->id = id_priv; 4134 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE; 4135 atomic_inc(&id_priv->refcount); 4136 queue_work(cma_wq, &work->work); 4137 } 4138 4139 return 0; 4140 } 4141 4142 static int cma_netdev_callback(struct notifier_block *self, unsigned long event, 4143 void *ptr) 4144 { 4145 struct net_device *ndev = netdev_notifier_info_to_dev(ptr); 4146 struct cma_device *cma_dev; 4147 struct rdma_id_private *id_priv; 4148 int ret = NOTIFY_DONE; 4149 4150 if (event != NETDEV_BONDING_FAILOVER) 4151 return NOTIFY_DONE; 4152 4153 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING)) 4154 return NOTIFY_DONE; 4155 4156 mutex_lock(&lock); 4157 list_for_each_entry(cma_dev, &dev_list, list) 4158 list_for_each_entry(id_priv, &cma_dev->id_list, list) { 4159 ret = cma_netdev_change(ndev, id_priv); 4160 if (ret) 4161 goto out; 4162 } 4163 4164 out: 4165 mutex_unlock(&lock); 4166 return ret; 4167 } 4168 4169 static struct notifier_block cma_nb = { 4170 .notifier_call = cma_netdev_callback 4171 }; 4172 4173 static void cma_add_one(struct ib_device *device) 4174 { 4175 struct cma_device *cma_dev; 4176 struct rdma_id_private *id_priv; 4177 unsigned int i; 4178 unsigned long supported_gids = 0; 4179 4180 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL); 4181 if (!cma_dev) 4182 return; 4183 4184 cma_dev->device = device; 4185 cma_dev->default_gid_type = kcalloc(device->phys_port_cnt, 4186 sizeof(*cma_dev->default_gid_type), 4187 GFP_KERNEL); 4188 if (!cma_dev->default_gid_type) { 4189 kfree(cma_dev); 4190 return; 4191 } 4192 for (i = rdma_start_port(device); i <= rdma_end_port(device); i++) { 4193 supported_gids = roce_gid_type_mask_support(device, i); 4194 WARN_ON(!supported_gids); 4195 cma_dev->default_gid_type[i - rdma_start_port(device)] = 4196 find_first_bit(&supported_gids, BITS_PER_LONG); 4197 } 4198 4199 init_completion(&cma_dev->comp); 4200 atomic_set(&cma_dev->refcount, 1); 4201 INIT_LIST_HEAD(&cma_dev->id_list); 4202 ib_set_client_data(device, &cma_client, cma_dev); 4203 4204 mutex_lock(&lock); 4205 list_add_tail(&cma_dev->list, &dev_list); 4206 list_for_each_entry(id_priv, &listen_any_list, list) 4207 cma_listen_on_dev(id_priv, cma_dev); 4208 mutex_unlock(&lock); 4209 } 4210 4211 static int cma_remove_id_dev(struct rdma_id_private *id_priv) 4212 { 4213 struct rdma_cm_event event; 4214 enum rdma_cm_state state; 4215 int ret = 0; 4216 4217 /* Record that we want to remove the device */ 4218 state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL); 4219 if (state == RDMA_CM_DESTROYING) 4220 return 0; 4221 4222 cma_cancel_operation(id_priv, state); 4223 mutex_lock(&id_priv->handler_mutex); 4224 4225 /* Check for destruction from another callback. */ 4226 if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL)) 4227 goto out; 4228 4229 memset(&event, 0, sizeof event); 4230 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL; 4231 ret = id_priv->id.event_handler(&id_priv->id, &event); 4232 out: 4233 mutex_unlock(&id_priv->handler_mutex); 4234 return ret; 4235 } 4236 4237 static void cma_process_remove(struct cma_device *cma_dev) 4238 { 4239 struct rdma_id_private *id_priv; 4240 int ret; 4241 4242 mutex_lock(&lock); 4243 while (!list_empty(&cma_dev->id_list)) { 4244 id_priv = list_entry(cma_dev->id_list.next, 4245 struct rdma_id_private, list); 4246 4247 list_del(&id_priv->listen_list); 4248 list_del_init(&id_priv->list); 4249 atomic_inc(&id_priv->refcount); 4250 mutex_unlock(&lock); 4251 4252 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv); 4253 cma_deref_id(id_priv); 4254 if (ret) 4255 rdma_destroy_id(&id_priv->id); 4256 4257 mutex_lock(&lock); 4258 } 4259 mutex_unlock(&lock); 4260 4261 cma_deref_dev(cma_dev); 4262 wait_for_completion(&cma_dev->comp); 4263 } 4264 4265 static void cma_remove_one(struct ib_device *device, void *client_data) 4266 { 4267 struct cma_device *cma_dev = client_data; 4268 4269 if (!cma_dev) 4270 return; 4271 4272 mutex_lock(&lock); 4273 list_del(&cma_dev->list); 4274 mutex_unlock(&lock); 4275 4276 cma_process_remove(cma_dev); 4277 kfree(cma_dev->default_gid_type); 4278 kfree(cma_dev); 4279 } 4280 4281 static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb) 4282 { 4283 struct nlmsghdr *nlh; 4284 struct rdma_cm_id_stats *id_stats; 4285 struct rdma_id_private *id_priv; 4286 struct rdma_cm_id *id = NULL; 4287 struct cma_device *cma_dev; 4288 int i_dev = 0, i_id = 0; 4289 4290 /* 4291 * We export all of the IDs as a sequence of messages. Each 4292 * ID gets its own netlink message. 4293 */ 4294 mutex_lock(&lock); 4295 4296 list_for_each_entry(cma_dev, &dev_list, list) { 4297 if (i_dev < cb->args[0]) { 4298 i_dev++; 4299 continue; 4300 } 4301 4302 i_id = 0; 4303 list_for_each_entry(id_priv, &cma_dev->id_list, list) { 4304 if (i_id < cb->args[1]) { 4305 i_id++; 4306 continue; 4307 } 4308 4309 id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq, 4310 sizeof *id_stats, RDMA_NL_RDMA_CM, 4311 RDMA_NL_RDMA_CM_ID_STATS, 4312 NLM_F_MULTI); 4313 if (!id_stats) 4314 goto out; 4315 4316 memset(id_stats, 0, sizeof *id_stats); 4317 id = &id_priv->id; 4318 id_stats->node_type = id->route.addr.dev_addr.dev_type; 4319 id_stats->port_num = id->port_num; 4320 id_stats->bound_dev_if = 4321 id->route.addr.dev_addr.bound_dev_if; 4322 4323 if (ibnl_put_attr(skb, nlh, 4324 rdma_addr_size(cma_src_addr(id_priv)), 4325 cma_src_addr(id_priv), 4326 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR)) 4327 goto out; 4328 if (ibnl_put_attr(skb, nlh, 4329 rdma_addr_size(cma_src_addr(id_priv)), 4330 cma_dst_addr(id_priv), 4331 RDMA_NL_RDMA_CM_ATTR_DST_ADDR)) 4332 goto out; 4333 4334 id_stats->pid = id_priv->owner; 4335 id_stats->port_space = id->ps; 4336 id_stats->cm_state = id_priv->state; 4337 id_stats->qp_num = id_priv->qp_num; 4338 id_stats->qp_type = id->qp_type; 4339 4340 i_id++; 4341 } 4342 4343 cb->args[1] = 0; 4344 i_dev++; 4345 } 4346 4347 out: 4348 mutex_unlock(&lock); 4349 cb->args[0] = i_dev; 4350 cb->args[1] = i_id; 4351 4352 return skb->len; 4353 } 4354 4355 static const struct ibnl_client_cbs cma_cb_table[] = { 4356 [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats, 4357 .module = THIS_MODULE }, 4358 }; 4359 4360 static int cma_init_net(struct net *net) 4361 { 4362 struct cma_pernet *pernet = cma_pernet(net); 4363 4364 idr_init(&pernet->tcp_ps); 4365 idr_init(&pernet->udp_ps); 4366 idr_init(&pernet->ipoib_ps); 4367 idr_init(&pernet->ib_ps); 4368 4369 return 0; 4370 } 4371 4372 static void cma_exit_net(struct net *net) 4373 { 4374 struct cma_pernet *pernet = cma_pernet(net); 4375 4376 idr_destroy(&pernet->tcp_ps); 4377 idr_destroy(&pernet->udp_ps); 4378 idr_destroy(&pernet->ipoib_ps); 4379 idr_destroy(&pernet->ib_ps); 4380 } 4381 4382 static struct pernet_operations cma_pernet_operations = { 4383 .init = cma_init_net, 4384 .exit = cma_exit_net, 4385 .id = &cma_pernet_id, 4386 .size = sizeof(struct cma_pernet), 4387 }; 4388 4389 static int __init cma_init(void) 4390 { 4391 int ret; 4392 4393 cma_wq = alloc_ordered_workqueue("rdma_cm", WQ_MEM_RECLAIM); 4394 if (!cma_wq) 4395 return -ENOMEM; 4396 4397 ret = register_pernet_subsys(&cma_pernet_operations); 4398 if (ret) 4399 goto err_wq; 4400 4401 ib_sa_register_client(&sa_client); 4402 rdma_addr_register_client(&addr_client); 4403 register_netdevice_notifier(&cma_nb); 4404 4405 ret = ib_register_client(&cma_client); 4406 if (ret) 4407 goto err; 4408 4409 if (ibnl_add_client(RDMA_NL_RDMA_CM, ARRAY_SIZE(cma_cb_table), 4410 cma_cb_table)) 4411 pr_warn("RDMA CMA: failed to add netlink callback\n"); 4412 cma_configfs_init(); 4413 4414 return 0; 4415 4416 err: 4417 unregister_netdevice_notifier(&cma_nb); 4418 rdma_addr_unregister_client(&addr_client); 4419 ib_sa_unregister_client(&sa_client); 4420 err_wq: 4421 destroy_workqueue(cma_wq); 4422 return ret; 4423 } 4424 4425 static void __exit cma_cleanup(void) 4426 { 4427 cma_configfs_exit(); 4428 ibnl_remove_client(RDMA_NL_RDMA_CM); 4429 ib_unregister_client(&cma_client); 4430 unregister_netdevice_notifier(&cma_nb); 4431 rdma_addr_unregister_client(&addr_client); 4432 ib_sa_unregister_client(&sa_client); 4433 unregister_pernet_subsys(&cma_pernet_operations); 4434 destroy_workqueue(cma_wq); 4435 } 4436 4437 module_init(cma_init); 4438 module_exit(cma_cleanup); 4439