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