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 63MODULE_AUTHOR("Sean Hefty"); 64MODULE_DESCRIPTION("Generic RDMA CM Agent"); 65MODULE_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 72static 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 91const 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} 98EXPORT_SYMBOL(rdma_event_msg); 99 100static void cma_add_one(struct ib_device *device); 101static void cma_remove_one(struct ib_device *device, void *client_data); 102 103static struct ib_client cma_client = { 104 .name = "cma", 105 .add = cma_add_one, 106 .remove = cma_remove_one 107}; 108 109static struct ib_sa_client sa_client; 110static struct rdma_addr_client addr_client; 111static LIST_HEAD(dev_list); 112static LIST_HEAD(listen_any_list); 113static DEFINE_MUTEX(lock); 114static struct workqueue_struct *cma_wq; 115static int cma_pernet_id; 116 117struct cma_pernet { 118 struct idr tcp_ps; 119 struct idr udp_ps; 120 struct idr ipoib_ps; 121 struct idr ib_ps; 122}; 123 124static struct cma_pernet *cma_pernet(struct net *net) 125{ 126 return net_generic(net, cma_pernet_id); 127} 128 129static 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 147struct 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 155struct rdma_bind_list { 156 enum rdma_port_space ps; 157 struct hlist_head owners; 158 unsigned short port; 159}; 160 161static 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 169static 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 177static 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 184enum { 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 */ 194struct 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 233struct 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 244struct 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 252struct cma_ndev_work { 253 struct work_struct work; 254 struct rdma_id_private *id; 255 struct rdma_cm_event event; 256}; 257 258struct iboe_mcast_work { 259 struct work_struct work; 260 struct rdma_id_private *id; 261 struct cma_multicast *mc; 262}; 263 264union cma_ip_addr { 265 struct in6_addr ip6; 266 struct { 267 __be32 pad[3]; 268 __be32 addr; 269 } ip4; 270}; 271 272struct 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 282struct 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 291static 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 302static 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 315static 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 328static inline u8 cma_get_ip_ver(const struct cma_hdr *hdr) 329{ 330 return hdr->ip_version >> 4; 331} 332 333static 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 338static 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 349static 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 355static 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 363static 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 372static 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 377static 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 382static 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 387static 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 422static 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 429static 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 443static 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 && rdma_protocol_roce(device, port)) 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 467static 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 522out: 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 */ 533static 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 578found: 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 586static 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 592static 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 603struct 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} 632EXPORT_SYMBOL(rdma_create_id); 633 634static 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 660static 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 673int 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; 699err: 700 ib_destroy_qp(qp); 701 return ret; 702} 703EXPORT_SYMBOL(rdma_create_qp); 704 705void 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} 715EXPORT_SYMBOL(rdma_destroy_qp); 716 717static 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); 755out: 756 mutex_unlock(&id_priv->qp_mutex); 757 return ret; 758} 759 760static 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); 780out: 781 mutex_unlock(&id_priv->qp_mutex); 782 return ret; 783} 784 785static 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); 798out: 799 mutex_unlock(&id_priv->qp_mutex); 800 return ret; 801} 802 803static 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 837int 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} 865EXPORT_SYMBOL(rdma_init_qp_attr); 866 867static 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 881static 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 895static inline int cma_any_addr(struct sockaddr *addr) 896{ 897 return cma_zero_addr(addr) || cma_loopback_addr(addr); 898} 899 900static 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 918static __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 936static inline int cma_any_port(struct sockaddr *addr) 937{ 938 return !cma_port(addr); 939} 940 941static 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 978static 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 1000static 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 1022static u16 cma_port_from_service_id(__be64 service_id) 1023{ 1024 return (u16)be64_to_cpu(service_id); 1025} 1026 1027static 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 1055static 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 1073static 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 1105static 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 1135static 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 1159static 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 1182static 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 1210static enum rdma_port_space rdma_ps_from_service_id(__be64 service_id) 1211{ 1212 return (be64_to_cpu(service_id) >> 16) & 0xffff; 1213} 1214 1215static 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 1251static 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 1260static 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 1268static bool cma_match_net_dev(const struct rdma_cm_id *id, 1269 const struct net_device *net_dev, 1270 u8 port_num) 1271{ 1272 const struct rdma_addr *addr = &id->route.addr; 1273 1274 if (!net_dev) 1275 /* This request is an AF_IB request or a RoCE request */ 1276 return (!id->port_num || id->port_num == port_num) && 1277 (addr->src_addr.ss_family == AF_IB || 1278 cma_protocol_roce_dev_port(id->device, port_num)); 1279 1280 return !addr->dev_addr.bound_dev_if || 1281 (net_eq(dev_net(net_dev), addr->dev_addr.net) && 1282 addr->dev_addr.bound_dev_if == net_dev->ifindex); 1283} 1284 1285static struct rdma_id_private *cma_find_listener( 1286 const struct rdma_bind_list *bind_list, 1287 const struct ib_cm_id *cm_id, 1288 const struct ib_cm_event *ib_event, 1289 const struct cma_req_info *req, 1290 const struct net_device *net_dev) 1291{ 1292 struct rdma_id_private *id_priv, *id_priv_dev; 1293 1294 if (!bind_list) 1295 return ERR_PTR(-EINVAL); 1296 1297 hlist_for_each_entry(id_priv, &bind_list->owners, node) { 1298 if (cma_match_private_data(id_priv, ib_event->private_data)) { 1299 if (id_priv->id.device == cm_id->device && 1300 cma_match_net_dev(&id_priv->id, net_dev, req->port)) 1301 return id_priv; 1302 list_for_each_entry(id_priv_dev, 1303 &id_priv->listen_list, 1304 listen_list) { 1305 if (id_priv_dev->id.device == cm_id->device && 1306 cma_match_net_dev(&id_priv_dev->id, net_dev, req->port)) 1307 return id_priv_dev; 1308 } 1309 } 1310 } 1311 1312 return ERR_PTR(-EINVAL); 1313} 1314 1315static struct rdma_id_private *cma_id_from_event(struct ib_cm_id *cm_id, 1316 struct ib_cm_event *ib_event, 1317 struct net_device **net_dev) 1318{ 1319 struct cma_req_info req; 1320 struct rdma_bind_list *bind_list; 1321 struct rdma_id_private *id_priv; 1322 int err; 1323 1324 err = cma_save_req_info(ib_event, &req); 1325 if (err) 1326 return ERR_PTR(err); 1327 1328 *net_dev = cma_get_net_dev(ib_event, &req); 1329 if (IS_ERR(*net_dev)) { 1330 if (PTR_ERR(*net_dev) == -EAFNOSUPPORT) { 1331 /* Assuming the protocol is AF_IB */ 1332 *net_dev = NULL; 1333 } else if (cma_protocol_roce_dev_port(req.device, req.port)) { 1334 /* TODO find the net dev matching the request parameters 1335 * through the RoCE GID table */ 1336 *net_dev = NULL; 1337 } else { 1338 return ERR_CAST(*net_dev); 1339 } 1340 } 1341 1342 bind_list = cma_ps_find(*net_dev ? dev_net(*net_dev) : &init_net, 1343 rdma_ps_from_service_id(req.service_id), 1344 cma_port_from_service_id(req.service_id)); 1345 id_priv = cma_find_listener(bind_list, cm_id, ib_event, &req, *net_dev); 1346 if (IS_ERR(id_priv) && *net_dev) { 1347 dev_put(*net_dev); 1348 *net_dev = NULL; 1349 } 1350 1351 return id_priv; 1352} 1353 1354static inline int cma_user_data_offset(struct rdma_id_private *id_priv) 1355{ 1356 return cma_family(id_priv) == AF_IB ? 0 : sizeof(struct cma_hdr); 1357} 1358 1359static void cma_cancel_route(struct rdma_id_private *id_priv) 1360{ 1361 if (rdma_cap_ib_sa(id_priv->id.device, id_priv->id.port_num)) { 1362 if (id_priv->query) 1363 ib_sa_cancel_query(id_priv->query_id, id_priv->query); 1364 } 1365} 1366 1367static void cma_cancel_listens(struct rdma_id_private *id_priv) 1368{ 1369 struct rdma_id_private *dev_id_priv; 1370 1371 /* 1372 * Remove from listen_any_list to prevent added devices from spawning 1373 * additional listen requests. 1374 */ 1375 mutex_lock(&lock); 1376 list_del(&id_priv->list); 1377 1378 while (!list_empty(&id_priv->listen_list)) { 1379 dev_id_priv = list_entry(id_priv->listen_list.next, 1380 struct rdma_id_private, listen_list); 1381 /* sync with device removal to avoid duplicate destruction */ 1382 list_del_init(&dev_id_priv->list); 1383 list_del(&dev_id_priv->listen_list); 1384 mutex_unlock(&lock); 1385 1386 rdma_destroy_id(&dev_id_priv->id); 1387 mutex_lock(&lock); 1388 } 1389 mutex_unlock(&lock); 1390} 1391 1392static void cma_cancel_operation(struct rdma_id_private *id_priv, 1393 enum rdma_cm_state state) 1394{ 1395 switch (state) { 1396 case RDMA_CM_ADDR_QUERY: 1397 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr); 1398 break; 1399 case RDMA_CM_ROUTE_QUERY: 1400 cma_cancel_route(id_priv); 1401 break; 1402 case RDMA_CM_LISTEN: 1403 if (cma_any_addr(cma_src_addr(id_priv)) && !id_priv->cma_dev) 1404 cma_cancel_listens(id_priv); 1405 break; 1406 default: 1407 break; 1408 } 1409} 1410 1411static void cma_release_port(struct rdma_id_private *id_priv) 1412{ 1413 struct rdma_bind_list *bind_list = id_priv->bind_list; 1414 struct net *net = id_priv->id.route.addr.dev_addr.net; 1415 1416 if (!bind_list) 1417 return; 1418 1419 mutex_lock(&lock); 1420 hlist_del(&id_priv->node); 1421 if (hlist_empty(&bind_list->owners)) { 1422 cma_ps_remove(net, bind_list->ps, bind_list->port); 1423 kfree(bind_list); 1424 } 1425 mutex_unlock(&lock); 1426} 1427 1428static void cma_leave_mc_groups(struct rdma_id_private *id_priv) 1429{ 1430 struct cma_multicast *mc; 1431 1432 while (!list_empty(&id_priv->mc_list)) { 1433 mc = container_of(id_priv->mc_list.next, 1434 struct cma_multicast, list); 1435 list_del(&mc->list); 1436 if (rdma_cap_ib_mcast(id_priv->cma_dev->device, 1437 id_priv->id.port_num)) { 1438 ib_sa_free_multicast(mc->multicast.ib); 1439 kfree(mc); 1440 } else 1441 kref_put(&mc->mcref, release_mc); 1442 } 1443} 1444 1445void rdma_destroy_id(struct rdma_cm_id *id) 1446{ 1447 struct rdma_id_private *id_priv; 1448 enum rdma_cm_state state; 1449 1450 id_priv = container_of(id, struct rdma_id_private, id); 1451 state = cma_exch(id_priv, RDMA_CM_DESTROYING); 1452 cma_cancel_operation(id_priv, state); 1453 1454 /* 1455 * Wait for any active callback to finish. New callbacks will find 1456 * the id_priv state set to destroying and abort. 1457 */ 1458 mutex_lock(&id_priv->handler_mutex); 1459 mutex_unlock(&id_priv->handler_mutex); 1460 1461 if (id_priv->cma_dev) { 1462 if (rdma_cap_ib_cm(id_priv->id.device, 1)) { 1463 if (id_priv->cm_id.ib) 1464 ib_destroy_cm_id(id_priv->cm_id.ib); 1465 } else if (rdma_cap_iw_cm(id_priv->id.device, 1)) { 1466 if (id_priv->cm_id.iw) 1467 iw_destroy_cm_id(id_priv->cm_id.iw); 1468 } 1469 cma_leave_mc_groups(id_priv); 1470 cma_release_dev(id_priv); 1471 } 1472 1473 cma_release_port(id_priv); 1474 cma_deref_id(id_priv); 1475 wait_for_completion(&id_priv->comp); 1476 1477 if (id_priv->internal_id) 1478 cma_deref_id(id_priv->id.context); 1479 1480 kfree(id_priv->id.route.path_rec); 1481 put_net(id_priv->id.route.addr.dev_addr.net); 1482 kfree(id_priv); 1483} 1484EXPORT_SYMBOL(rdma_destroy_id); 1485 1486static int cma_rep_recv(struct rdma_id_private *id_priv) 1487{ 1488 int ret; 1489 1490 ret = cma_modify_qp_rtr(id_priv, NULL); 1491 if (ret) 1492 goto reject; 1493 1494 ret = cma_modify_qp_rts(id_priv, NULL); 1495 if (ret) 1496 goto reject; 1497 1498 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0); 1499 if (ret) 1500 goto reject; 1501 1502 return 0; 1503reject: 1504 cma_modify_qp_err(id_priv); 1505 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED, 1506 NULL, 0, NULL, 0); 1507 return ret; 1508} 1509 1510static void cma_set_rep_event_data(struct rdma_cm_event *event, 1511 struct ib_cm_rep_event_param *rep_data, 1512 void *private_data) 1513{ 1514 event->param.conn.private_data = private_data; 1515 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE; 1516 event->param.conn.responder_resources = rep_data->responder_resources; 1517 event->param.conn.initiator_depth = rep_data->initiator_depth; 1518 event->param.conn.flow_control = rep_data->flow_control; 1519 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count; 1520 event->param.conn.srq = rep_data->srq; 1521 event->param.conn.qp_num = rep_data->remote_qpn; 1522} 1523 1524static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) 1525{ 1526 struct rdma_id_private *id_priv = cm_id->context; 1527 struct rdma_cm_event event; 1528 int ret = 0; 1529 1530 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT && 1531 cma_disable_callback(id_priv, RDMA_CM_CONNECT)) || 1532 (ib_event->event == IB_CM_TIMEWAIT_EXIT && 1533 cma_disable_callback(id_priv, RDMA_CM_DISCONNECT))) 1534 return 0; 1535 1536 memset(&event, 0, sizeof event); 1537 switch (ib_event->event) { 1538 case IB_CM_REQ_ERROR: 1539 case IB_CM_REP_ERROR: 1540 event.event = RDMA_CM_EVENT_UNREACHABLE; 1541 event.status = -ETIMEDOUT; 1542 break; 1543 case IB_CM_REP_RECEIVED: 1544 if (id_priv->id.qp) { 1545 event.status = cma_rep_recv(id_priv); 1546 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR : 1547 RDMA_CM_EVENT_ESTABLISHED; 1548 } else { 1549 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE; 1550 } 1551 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd, 1552 ib_event->private_data); 1553 break; 1554 case IB_CM_RTU_RECEIVED: 1555 case IB_CM_USER_ESTABLISHED: 1556 event.event = RDMA_CM_EVENT_ESTABLISHED; 1557 break; 1558 case IB_CM_DREQ_ERROR: 1559 event.status = -ETIMEDOUT; /* fall through */ 1560 case IB_CM_DREQ_RECEIVED: 1561 case IB_CM_DREP_RECEIVED: 1562 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT, 1563 RDMA_CM_DISCONNECT)) 1564 goto out; 1565 event.event = RDMA_CM_EVENT_DISCONNECTED; 1566 break; 1567 case IB_CM_TIMEWAIT_EXIT: 1568 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT; 1569 break; 1570 case IB_CM_MRA_RECEIVED: 1571 /* ignore event */ 1572 goto out; 1573 case IB_CM_REJ_RECEIVED: 1574 cma_modify_qp_err(id_priv); 1575 event.status = ib_event->param.rej_rcvd.reason; 1576 event.event = RDMA_CM_EVENT_REJECTED; 1577 event.param.conn.private_data = ib_event->private_data; 1578 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE; 1579 break; 1580 default: 1581 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n", 1582 ib_event->event); 1583 goto out; 1584 } 1585 1586 ret = id_priv->id.event_handler(&id_priv->id, &event); 1587 if (ret) { 1588 /* Destroy the CM ID by returning a non-zero value. */ 1589 id_priv->cm_id.ib = NULL; 1590 cma_exch(id_priv, RDMA_CM_DESTROYING); 1591 mutex_unlock(&id_priv->handler_mutex); 1592 rdma_destroy_id(&id_priv->id); 1593 return ret; 1594 } 1595out: 1596 mutex_unlock(&id_priv->handler_mutex); 1597 return ret; 1598} 1599 1600static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id, 1601 struct ib_cm_event *ib_event, 1602 struct net_device *net_dev) 1603{ 1604 struct rdma_id_private *id_priv; 1605 struct rdma_cm_id *id; 1606 struct rdma_route *rt; 1607 const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family; 1608 const __be64 service_id = 1609 ib_event->param.req_rcvd.primary_path->service_id; 1610 int ret; 1611 1612 id = rdma_create_id(listen_id->route.addr.dev_addr.net, 1613 listen_id->event_handler, listen_id->context, 1614 listen_id->ps, ib_event->param.req_rcvd.qp_type); 1615 if (IS_ERR(id)) 1616 return NULL; 1617 1618 id_priv = container_of(id, struct rdma_id_private, id); 1619 if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr, 1620 (struct sockaddr *)&id->route.addr.dst_addr, 1621 listen_id, ib_event, ss_family, service_id)) 1622 goto err; 1623 1624 rt = &id->route; 1625 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1; 1626 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths, 1627 GFP_KERNEL); 1628 if (!rt->path_rec) 1629 goto err; 1630 1631 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path; 1632 if (rt->num_paths == 2) 1633 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path; 1634 1635 if (net_dev) { 1636 ret = rdma_copy_addr(&rt->addr.dev_addr, net_dev, NULL); 1637 if (ret) 1638 goto err; 1639 } else { 1640 if (!cma_protocol_roce(listen_id) && 1641 cma_any_addr(cma_src_addr(id_priv))) { 1642 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND; 1643 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid); 1644 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey)); 1645 } else if (!cma_any_addr(cma_src_addr(id_priv))) { 1646 ret = cma_translate_addr(cma_src_addr(id_priv), &rt->addr.dev_addr); 1647 if (ret) 1648 goto err; 1649 } 1650 } 1651 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid); 1652 1653 id_priv->state = RDMA_CM_CONNECT; 1654 return id_priv; 1655 1656err: 1657 rdma_destroy_id(id); 1658 return NULL; 1659} 1660 1661static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id, 1662 struct ib_cm_event *ib_event, 1663 struct net_device *net_dev) 1664{ 1665 struct rdma_id_private *id_priv; 1666 struct rdma_cm_id *id; 1667 const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family; 1668 struct net *net = listen_id->route.addr.dev_addr.net; 1669 int ret; 1670 1671 id = rdma_create_id(net, listen_id->event_handler, listen_id->context, 1672 listen_id->ps, IB_QPT_UD); 1673 if (IS_ERR(id)) 1674 return NULL; 1675 1676 id_priv = container_of(id, struct rdma_id_private, id); 1677 if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr, 1678 (struct sockaddr *)&id->route.addr.dst_addr, 1679 listen_id, ib_event, ss_family, 1680 ib_event->param.sidr_req_rcvd.service_id)) 1681 goto err; 1682 1683 if (net_dev) { 1684 ret = rdma_copy_addr(&id->route.addr.dev_addr, net_dev, NULL); 1685 if (ret) 1686 goto err; 1687 } else { 1688 if (!cma_any_addr(cma_src_addr(id_priv))) { 1689 ret = cma_translate_addr(cma_src_addr(id_priv), 1690 &id->route.addr.dev_addr); 1691 if (ret) 1692 goto err; 1693 } 1694 } 1695 1696 id_priv->state = RDMA_CM_CONNECT; 1697 return id_priv; 1698err: 1699 rdma_destroy_id(id); 1700 return NULL; 1701} 1702 1703static void cma_set_req_event_data(struct rdma_cm_event *event, 1704 struct ib_cm_req_event_param *req_data, 1705 void *private_data, int offset) 1706{ 1707 event->param.conn.private_data = private_data + offset; 1708 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset; 1709 event->param.conn.responder_resources = req_data->responder_resources; 1710 event->param.conn.initiator_depth = req_data->initiator_depth; 1711 event->param.conn.flow_control = req_data->flow_control; 1712 event->param.conn.retry_count = req_data->retry_count; 1713 event->param.conn.rnr_retry_count = req_data->rnr_retry_count; 1714 event->param.conn.srq = req_data->srq; 1715 event->param.conn.qp_num = req_data->remote_qpn; 1716} 1717 1718static int cma_check_req_qp_type(struct rdma_cm_id *id, struct ib_cm_event *ib_event) 1719{ 1720 return (((ib_event->event == IB_CM_REQ_RECEIVED) && 1721 (ib_event->param.req_rcvd.qp_type == id->qp_type)) || 1722 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) && 1723 (id->qp_type == IB_QPT_UD)) || 1724 (!id->qp_type)); 1725} 1726 1727static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) 1728{ 1729 struct rdma_id_private *listen_id, *conn_id; 1730 struct rdma_cm_event event; 1731 struct net_device *net_dev; 1732 int offset, ret; 1733 1734 listen_id = cma_id_from_event(cm_id, ib_event, &net_dev); 1735 if (IS_ERR(listen_id)) 1736 return PTR_ERR(listen_id); 1737 1738 if (!cma_check_req_qp_type(&listen_id->id, ib_event)) { 1739 ret = -EINVAL; 1740 goto net_dev_put; 1741 } 1742 1743 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN)) { 1744 ret = -ECONNABORTED; 1745 goto net_dev_put; 1746 } 1747 1748 memset(&event, 0, sizeof event); 1749 offset = cma_user_data_offset(listen_id); 1750 event.event = RDMA_CM_EVENT_CONNECT_REQUEST; 1751 if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) { 1752 conn_id = cma_new_udp_id(&listen_id->id, ib_event, net_dev); 1753 event.param.ud.private_data = ib_event->private_data + offset; 1754 event.param.ud.private_data_len = 1755 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset; 1756 } else { 1757 conn_id = cma_new_conn_id(&listen_id->id, ib_event, net_dev); 1758 cma_set_req_event_data(&event, &ib_event->param.req_rcvd, 1759 ib_event->private_data, offset); 1760 } 1761 if (!conn_id) { 1762 ret = -ENOMEM; 1763 goto err1; 1764 } 1765 1766 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING); 1767 ret = cma_acquire_dev(conn_id, listen_id); 1768 if (ret) 1769 goto err2; 1770 1771 conn_id->cm_id.ib = cm_id; 1772 cm_id->context = conn_id; 1773 cm_id->cm_handler = cma_ib_handler; 1774 1775 /* 1776 * Protect against the user destroying conn_id from another thread 1777 * until we're done accessing it. 1778 */ 1779 atomic_inc(&conn_id->refcount); 1780 ret = conn_id->id.event_handler(&conn_id->id, &event); 1781 if (ret) 1782 goto err3; 1783 /* 1784 * Acquire mutex to prevent user executing rdma_destroy_id() 1785 * while we're accessing the cm_id. 1786 */ 1787 mutex_lock(&lock); 1788 if (cma_comp(conn_id, RDMA_CM_CONNECT) && 1789 (conn_id->id.qp_type != IB_QPT_UD)) 1790 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0); 1791 mutex_unlock(&lock); 1792 mutex_unlock(&conn_id->handler_mutex); 1793 mutex_unlock(&listen_id->handler_mutex); 1794 cma_deref_id(conn_id); 1795 if (net_dev) 1796 dev_put(net_dev); 1797 return 0; 1798 1799err3: 1800 cma_deref_id(conn_id); 1801 /* Destroy the CM ID by returning a non-zero value. */ 1802 conn_id->cm_id.ib = NULL; 1803err2: 1804 cma_exch(conn_id, RDMA_CM_DESTROYING); 1805 mutex_unlock(&conn_id->handler_mutex); 1806err1: 1807 mutex_unlock(&listen_id->handler_mutex); 1808 if (conn_id) 1809 rdma_destroy_id(&conn_id->id); 1810 1811net_dev_put: 1812 if (net_dev) 1813 dev_put(net_dev); 1814 1815 return ret; 1816} 1817 1818__be64 rdma_get_service_id(struct rdma_cm_id *id, struct sockaddr *addr) 1819{ 1820 if (addr->sa_family == AF_IB) 1821 return ((struct sockaddr_ib *) addr)->sib_sid; 1822 1823 return cpu_to_be64(((u64)id->ps << 16) + be16_to_cpu(cma_port(addr))); 1824} 1825EXPORT_SYMBOL(rdma_get_service_id); 1826 1827static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event) 1828{ 1829 struct rdma_id_private *id_priv = iw_id->context; 1830 struct rdma_cm_event event; 1831 int ret = 0; 1832 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr; 1833 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr; 1834 1835 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT)) 1836 return 0; 1837 1838 memset(&event, 0, sizeof event); 1839 switch (iw_event->event) { 1840 case IW_CM_EVENT_CLOSE: 1841 event.event = RDMA_CM_EVENT_DISCONNECTED; 1842 break; 1843 case IW_CM_EVENT_CONNECT_REPLY: 1844 memcpy(cma_src_addr(id_priv), laddr, 1845 rdma_addr_size(laddr)); 1846 memcpy(cma_dst_addr(id_priv), raddr, 1847 rdma_addr_size(raddr)); 1848 switch (iw_event->status) { 1849 case 0: 1850 event.event = RDMA_CM_EVENT_ESTABLISHED; 1851 event.param.conn.initiator_depth = iw_event->ird; 1852 event.param.conn.responder_resources = iw_event->ord; 1853 break; 1854 case -ECONNRESET: 1855 case -ECONNREFUSED: 1856 event.event = RDMA_CM_EVENT_REJECTED; 1857 break; 1858 case -ETIMEDOUT: 1859 event.event = RDMA_CM_EVENT_UNREACHABLE; 1860 break; 1861 default: 1862 event.event = RDMA_CM_EVENT_CONNECT_ERROR; 1863 break; 1864 } 1865 break; 1866 case IW_CM_EVENT_ESTABLISHED: 1867 event.event = RDMA_CM_EVENT_ESTABLISHED; 1868 event.param.conn.initiator_depth = iw_event->ird; 1869 event.param.conn.responder_resources = iw_event->ord; 1870 break; 1871 default: 1872 BUG_ON(1); 1873 } 1874 1875 event.status = iw_event->status; 1876 event.param.conn.private_data = iw_event->private_data; 1877 event.param.conn.private_data_len = iw_event->private_data_len; 1878 ret = id_priv->id.event_handler(&id_priv->id, &event); 1879 if (ret) { 1880 /* Destroy the CM ID by returning a non-zero value. */ 1881 id_priv->cm_id.iw = NULL; 1882 cma_exch(id_priv, RDMA_CM_DESTROYING); 1883 mutex_unlock(&id_priv->handler_mutex); 1884 rdma_destroy_id(&id_priv->id); 1885 return ret; 1886 } 1887 1888 mutex_unlock(&id_priv->handler_mutex); 1889 return ret; 1890} 1891 1892static int iw_conn_req_handler(struct iw_cm_id *cm_id, 1893 struct iw_cm_event *iw_event) 1894{ 1895 struct rdma_cm_id *new_cm_id; 1896 struct rdma_id_private *listen_id, *conn_id; 1897 struct rdma_cm_event event; 1898 int ret; 1899 struct ib_device_attr attr; 1900 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr; 1901 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr; 1902 1903 listen_id = cm_id->context; 1904 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN)) 1905 return -ECONNABORTED; 1906 1907 /* Create a new RDMA id for the new IW CM ID */ 1908 new_cm_id = rdma_create_id(listen_id->id.route.addr.dev_addr.net, 1909 listen_id->id.event_handler, 1910 listen_id->id.context, 1911 RDMA_PS_TCP, IB_QPT_RC); 1912 if (IS_ERR(new_cm_id)) { 1913 ret = -ENOMEM; 1914 goto out; 1915 } 1916 conn_id = container_of(new_cm_id, struct rdma_id_private, id); 1917 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING); 1918 conn_id->state = RDMA_CM_CONNECT; 1919 1920 ret = rdma_translate_ip(laddr, &conn_id->id.route.addr.dev_addr, NULL); 1921 if (ret) { 1922 mutex_unlock(&conn_id->handler_mutex); 1923 rdma_destroy_id(new_cm_id); 1924 goto out; 1925 } 1926 1927 ret = cma_acquire_dev(conn_id, listen_id); 1928 if (ret) { 1929 mutex_unlock(&conn_id->handler_mutex); 1930 rdma_destroy_id(new_cm_id); 1931 goto out; 1932 } 1933 1934 conn_id->cm_id.iw = cm_id; 1935 cm_id->context = conn_id; 1936 cm_id->cm_handler = cma_iw_handler; 1937 1938 memcpy(cma_src_addr(conn_id), laddr, rdma_addr_size(laddr)); 1939 memcpy(cma_dst_addr(conn_id), raddr, rdma_addr_size(raddr)); 1940 1941 ret = ib_query_device(conn_id->id.device, &attr); 1942 if (ret) { 1943 mutex_unlock(&conn_id->handler_mutex); 1944 rdma_destroy_id(new_cm_id); 1945 goto out; 1946 } 1947 1948 memset(&event, 0, sizeof event); 1949 event.event = RDMA_CM_EVENT_CONNECT_REQUEST; 1950 event.param.conn.private_data = iw_event->private_data; 1951 event.param.conn.private_data_len = iw_event->private_data_len; 1952 event.param.conn.initiator_depth = iw_event->ird; 1953 event.param.conn.responder_resources = iw_event->ord; 1954 1955 /* 1956 * Protect against the user destroying conn_id from another thread 1957 * until we're done accessing it. 1958 */ 1959 atomic_inc(&conn_id->refcount); 1960 ret = conn_id->id.event_handler(&conn_id->id, &event); 1961 if (ret) { 1962 /* User wants to destroy the CM ID */ 1963 conn_id->cm_id.iw = NULL; 1964 cma_exch(conn_id, RDMA_CM_DESTROYING); 1965 mutex_unlock(&conn_id->handler_mutex); 1966 cma_deref_id(conn_id); 1967 rdma_destroy_id(&conn_id->id); 1968 goto out; 1969 } 1970 1971 mutex_unlock(&conn_id->handler_mutex); 1972 cma_deref_id(conn_id); 1973 1974out: 1975 mutex_unlock(&listen_id->handler_mutex); 1976 return ret; 1977} 1978 1979static int cma_ib_listen(struct rdma_id_private *id_priv) 1980{ 1981 struct sockaddr *addr; 1982 struct ib_cm_id *id; 1983 __be64 svc_id; 1984 1985 addr = cma_src_addr(id_priv); 1986 svc_id = rdma_get_service_id(&id_priv->id, addr); 1987 id = ib_cm_insert_listen(id_priv->id.device, cma_req_handler, svc_id); 1988 if (IS_ERR(id)) 1989 return PTR_ERR(id); 1990 id_priv->cm_id.ib = id; 1991 1992 return 0; 1993} 1994 1995static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog) 1996{ 1997 int ret; 1998 struct iw_cm_id *id; 1999 2000 id = iw_create_cm_id(id_priv->id.device, 2001 iw_conn_req_handler, 2002 id_priv); 2003 if (IS_ERR(id)) 2004 return PTR_ERR(id); 2005 2006 id->tos = id_priv->tos; 2007 id_priv->cm_id.iw = id; 2008 2009 memcpy(&id_priv->cm_id.iw->local_addr, cma_src_addr(id_priv), 2010 rdma_addr_size(cma_src_addr(id_priv))); 2011 2012 ret = iw_cm_listen(id_priv->cm_id.iw, backlog); 2013 2014 if (ret) { 2015 iw_destroy_cm_id(id_priv->cm_id.iw); 2016 id_priv->cm_id.iw = NULL; 2017 } 2018 2019 return ret; 2020} 2021 2022static int cma_listen_handler(struct rdma_cm_id *id, 2023 struct rdma_cm_event *event) 2024{ 2025 struct rdma_id_private *id_priv = id->context; 2026 2027 id->context = id_priv->id.context; 2028 id->event_handler = id_priv->id.event_handler; 2029 return id_priv->id.event_handler(id, event); 2030} 2031 2032static void cma_listen_on_dev(struct rdma_id_private *id_priv, 2033 struct cma_device *cma_dev) 2034{ 2035 struct rdma_id_private *dev_id_priv; 2036 struct rdma_cm_id *id; 2037 struct net *net = id_priv->id.route.addr.dev_addr.net; 2038 int ret; 2039 2040 if (cma_family(id_priv) == AF_IB && !rdma_cap_ib_cm(cma_dev->device, 1)) 2041 return; 2042 2043 id = rdma_create_id(net, cma_listen_handler, id_priv, id_priv->id.ps, 2044 id_priv->id.qp_type); 2045 if (IS_ERR(id)) 2046 return; 2047 2048 dev_id_priv = container_of(id, struct rdma_id_private, id); 2049 2050 dev_id_priv->state = RDMA_CM_ADDR_BOUND; 2051 memcpy(cma_src_addr(dev_id_priv), cma_src_addr(id_priv), 2052 rdma_addr_size(cma_src_addr(id_priv))); 2053 2054 cma_attach_to_dev(dev_id_priv, cma_dev); 2055 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list); 2056 atomic_inc(&id_priv->refcount); 2057 dev_id_priv->internal_id = 1; 2058 dev_id_priv->afonly = id_priv->afonly; 2059 2060 ret = rdma_listen(id, id_priv->backlog); 2061 if (ret) 2062 printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, " 2063 "listening on device %s\n", ret, cma_dev->device->name); 2064} 2065 2066static void cma_listen_on_all(struct rdma_id_private *id_priv) 2067{ 2068 struct cma_device *cma_dev; 2069 2070 mutex_lock(&lock); 2071 list_add_tail(&id_priv->list, &listen_any_list); 2072 list_for_each_entry(cma_dev, &dev_list, list) 2073 cma_listen_on_dev(id_priv, cma_dev); 2074 mutex_unlock(&lock); 2075} 2076 2077void rdma_set_service_type(struct rdma_cm_id *id, int tos) 2078{ 2079 struct rdma_id_private *id_priv; 2080 2081 id_priv = container_of(id, struct rdma_id_private, id); 2082 id_priv->tos = (u8) tos; 2083} 2084EXPORT_SYMBOL(rdma_set_service_type); 2085 2086static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec, 2087 void *context) 2088{ 2089 struct cma_work *work = context; 2090 struct rdma_route *route; 2091 2092 route = &work->id->id.route; 2093 2094 if (!status) { 2095 route->num_paths = 1; 2096 *route->path_rec = *path_rec; 2097 } else { 2098 work->old_state = RDMA_CM_ROUTE_QUERY; 2099 work->new_state = RDMA_CM_ADDR_RESOLVED; 2100 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR; 2101 work->event.status = status; 2102 } 2103 2104 queue_work(cma_wq, &work->work); 2105} 2106 2107static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms, 2108 struct cma_work *work) 2109{ 2110 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 2111 struct ib_sa_path_rec path_rec; 2112 ib_sa_comp_mask comp_mask; 2113 struct sockaddr_in6 *sin6; 2114 struct sockaddr_ib *sib; 2115 2116 memset(&path_rec, 0, sizeof path_rec); 2117 rdma_addr_get_sgid(dev_addr, &path_rec.sgid); 2118 rdma_addr_get_dgid(dev_addr, &path_rec.dgid); 2119 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); 2120 path_rec.numb_path = 1; 2121 path_rec.reversible = 1; 2122 path_rec.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv)); 2123 2124 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID | 2125 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH | 2126 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID; 2127 2128 switch (cma_family(id_priv)) { 2129 case AF_INET: 2130 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos); 2131 comp_mask |= IB_SA_PATH_REC_QOS_CLASS; 2132 break; 2133 case AF_INET6: 2134 sin6 = (struct sockaddr_in6 *) cma_src_addr(id_priv); 2135 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20); 2136 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS; 2137 break; 2138 case AF_IB: 2139 sib = (struct sockaddr_ib *) cma_src_addr(id_priv); 2140 path_rec.traffic_class = (u8) (be32_to_cpu(sib->sib_flowinfo) >> 20); 2141 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS; 2142 break; 2143 } 2144 2145 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device, 2146 id_priv->id.port_num, &path_rec, 2147 comp_mask, timeout_ms, 2148 GFP_KERNEL, cma_query_handler, 2149 work, &id_priv->query); 2150 2151 return (id_priv->query_id < 0) ? id_priv->query_id : 0; 2152} 2153 2154static void cma_work_handler(struct work_struct *_work) 2155{ 2156 struct cma_work *work = container_of(_work, struct cma_work, work); 2157 struct rdma_id_private *id_priv = work->id; 2158 int destroy = 0; 2159 2160 mutex_lock(&id_priv->handler_mutex); 2161 if (!cma_comp_exch(id_priv, work->old_state, work->new_state)) 2162 goto out; 2163 2164 if (id_priv->id.event_handler(&id_priv->id, &work->event)) { 2165 cma_exch(id_priv, RDMA_CM_DESTROYING); 2166 destroy = 1; 2167 } 2168out: 2169 mutex_unlock(&id_priv->handler_mutex); 2170 cma_deref_id(id_priv); 2171 if (destroy) 2172 rdma_destroy_id(&id_priv->id); 2173 kfree(work); 2174} 2175 2176static void cma_ndev_work_handler(struct work_struct *_work) 2177{ 2178 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work); 2179 struct rdma_id_private *id_priv = work->id; 2180 int destroy = 0; 2181 2182 mutex_lock(&id_priv->handler_mutex); 2183 if (id_priv->state == RDMA_CM_DESTROYING || 2184 id_priv->state == RDMA_CM_DEVICE_REMOVAL) 2185 goto out; 2186 2187 if (id_priv->id.event_handler(&id_priv->id, &work->event)) { 2188 cma_exch(id_priv, RDMA_CM_DESTROYING); 2189 destroy = 1; 2190 } 2191 2192out: 2193 mutex_unlock(&id_priv->handler_mutex); 2194 cma_deref_id(id_priv); 2195 if (destroy) 2196 rdma_destroy_id(&id_priv->id); 2197 kfree(work); 2198} 2199 2200static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms) 2201{ 2202 struct rdma_route *route = &id_priv->id.route; 2203 struct cma_work *work; 2204 int ret; 2205 2206 work = kzalloc(sizeof *work, GFP_KERNEL); 2207 if (!work) 2208 return -ENOMEM; 2209 2210 work->id = id_priv; 2211 INIT_WORK(&work->work, cma_work_handler); 2212 work->old_state = RDMA_CM_ROUTE_QUERY; 2213 work->new_state = RDMA_CM_ROUTE_RESOLVED; 2214 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 2215 2216 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL); 2217 if (!route->path_rec) { 2218 ret = -ENOMEM; 2219 goto err1; 2220 } 2221 2222 ret = cma_query_ib_route(id_priv, timeout_ms, work); 2223 if (ret) 2224 goto err2; 2225 2226 return 0; 2227err2: 2228 kfree(route->path_rec); 2229 route->path_rec = NULL; 2230err1: 2231 kfree(work); 2232 return ret; 2233} 2234 2235int rdma_set_ib_paths(struct rdma_cm_id *id, 2236 struct ib_sa_path_rec *path_rec, int num_paths) 2237{ 2238 struct rdma_id_private *id_priv; 2239 int ret; 2240 2241 id_priv = container_of(id, struct rdma_id_private, id); 2242 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, 2243 RDMA_CM_ROUTE_RESOLVED)) 2244 return -EINVAL; 2245 2246 id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths, 2247 GFP_KERNEL); 2248 if (!id->route.path_rec) { 2249 ret = -ENOMEM; 2250 goto err; 2251 } 2252 2253 id->route.num_paths = num_paths; 2254 return 0; 2255err: 2256 cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED); 2257 return ret; 2258} 2259EXPORT_SYMBOL(rdma_set_ib_paths); 2260 2261static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms) 2262{ 2263 struct cma_work *work; 2264 2265 work = kzalloc(sizeof *work, GFP_KERNEL); 2266 if (!work) 2267 return -ENOMEM; 2268 2269 work->id = id_priv; 2270 INIT_WORK(&work->work, cma_work_handler); 2271 work->old_state = RDMA_CM_ROUTE_QUERY; 2272 work->new_state = RDMA_CM_ROUTE_RESOLVED; 2273 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 2274 queue_work(cma_wq, &work->work); 2275 return 0; 2276} 2277 2278static int iboe_tos_to_sl(struct net_device *ndev, int tos) 2279{ 2280 int prio; 2281 struct net_device *dev; 2282 2283 prio = rt_tos2priority(tos); 2284 dev = ndev->priv_flags & IFF_802_1Q_VLAN ? 2285 vlan_dev_real_dev(ndev) : ndev; 2286 2287 if (dev->num_tc) 2288 return netdev_get_prio_tc_map(dev, prio); 2289 2290#if IS_ENABLED(CONFIG_VLAN_8021Q) 2291 if (ndev->priv_flags & IFF_802_1Q_VLAN) 2292 return (vlan_dev_get_egress_qos_mask(ndev, prio) & 2293 VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT; 2294#endif 2295 return 0; 2296} 2297 2298static int cma_resolve_iboe_route(struct rdma_id_private *id_priv) 2299{ 2300 struct rdma_route *route = &id_priv->id.route; 2301 struct rdma_addr *addr = &route->addr; 2302 struct cma_work *work; 2303 int ret; 2304 struct net_device *ndev = NULL; 2305 2306 2307 work = kzalloc(sizeof *work, GFP_KERNEL); 2308 if (!work) 2309 return -ENOMEM; 2310 2311 work->id = id_priv; 2312 INIT_WORK(&work->work, cma_work_handler); 2313 2314 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL); 2315 if (!route->path_rec) { 2316 ret = -ENOMEM; 2317 goto err1; 2318 } 2319 2320 route->num_paths = 1; 2321 2322 if (addr->dev_addr.bound_dev_if) { 2323 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if); 2324 route->path_rec->net = &init_net; 2325 route->path_rec->ifindex = addr->dev_addr.bound_dev_if; 2326 } 2327 if (!ndev) { 2328 ret = -ENODEV; 2329 goto err2; 2330 } 2331 2332 memcpy(route->path_rec->dmac, addr->dev_addr.dst_dev_addr, ETH_ALEN); 2333 2334 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr, 2335 &route->path_rec->sgid); 2336 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.dst_addr, 2337 &route->path_rec->dgid); 2338 2339 route->path_rec->hop_limit = 1; 2340 route->path_rec->reversible = 1; 2341 route->path_rec->pkey = cpu_to_be16(0xffff); 2342 route->path_rec->mtu_selector = IB_SA_EQ; 2343 route->path_rec->sl = iboe_tos_to_sl(ndev, id_priv->tos); 2344 route->path_rec->mtu = iboe_get_mtu(ndev->mtu); 2345 route->path_rec->rate_selector = IB_SA_EQ; 2346 route->path_rec->rate = iboe_get_rate(ndev); 2347 dev_put(ndev); 2348 route->path_rec->packet_life_time_selector = IB_SA_EQ; 2349 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME; 2350 if (!route->path_rec->mtu) { 2351 ret = -EINVAL; 2352 goto err2; 2353 } 2354 2355 work->old_state = RDMA_CM_ROUTE_QUERY; 2356 work->new_state = RDMA_CM_ROUTE_RESOLVED; 2357 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 2358 work->event.status = 0; 2359 2360 queue_work(cma_wq, &work->work); 2361 2362 return 0; 2363 2364err2: 2365 kfree(route->path_rec); 2366 route->path_rec = NULL; 2367err1: 2368 kfree(work); 2369 return ret; 2370} 2371 2372int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms) 2373{ 2374 struct rdma_id_private *id_priv; 2375 int ret; 2376 2377 id_priv = container_of(id, struct rdma_id_private, id); 2378 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY)) 2379 return -EINVAL; 2380 2381 atomic_inc(&id_priv->refcount); 2382 if (rdma_cap_ib_sa(id->device, id->port_num)) 2383 ret = cma_resolve_ib_route(id_priv, timeout_ms); 2384 else if (rdma_protocol_roce(id->device, id->port_num)) 2385 ret = cma_resolve_iboe_route(id_priv); 2386 else if (rdma_protocol_iwarp(id->device, id->port_num)) 2387 ret = cma_resolve_iw_route(id_priv, timeout_ms); 2388 else 2389 ret = -ENOSYS; 2390 2391 if (ret) 2392 goto err; 2393 2394 return 0; 2395err: 2396 cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED); 2397 cma_deref_id(id_priv); 2398 return ret; 2399} 2400EXPORT_SYMBOL(rdma_resolve_route); 2401 2402static void cma_set_loopback(struct sockaddr *addr) 2403{ 2404 switch (addr->sa_family) { 2405 case AF_INET: 2406 ((struct sockaddr_in *) addr)->sin_addr.s_addr = htonl(INADDR_LOOPBACK); 2407 break; 2408 case AF_INET6: 2409 ipv6_addr_set(&((struct sockaddr_in6 *) addr)->sin6_addr, 2410 0, 0, 0, htonl(1)); 2411 break; 2412 default: 2413 ib_addr_set(&((struct sockaddr_ib *) addr)->sib_addr, 2414 0, 0, 0, htonl(1)); 2415 break; 2416 } 2417} 2418 2419static int cma_bind_loopback(struct rdma_id_private *id_priv) 2420{ 2421 struct cma_device *cma_dev, *cur_dev; 2422 struct ib_port_attr port_attr; 2423 union ib_gid gid; 2424 u16 pkey; 2425 int ret; 2426 u8 p; 2427 2428 cma_dev = NULL; 2429 mutex_lock(&lock); 2430 list_for_each_entry(cur_dev, &dev_list, list) { 2431 if (cma_family(id_priv) == AF_IB && 2432 !rdma_cap_ib_cm(cur_dev->device, 1)) 2433 continue; 2434 2435 if (!cma_dev) 2436 cma_dev = cur_dev; 2437 2438 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) { 2439 if (!ib_query_port(cur_dev->device, p, &port_attr) && 2440 port_attr.state == IB_PORT_ACTIVE) { 2441 cma_dev = cur_dev; 2442 goto port_found; 2443 } 2444 } 2445 } 2446 2447 if (!cma_dev) { 2448 ret = -ENODEV; 2449 goto out; 2450 } 2451 2452 p = 1; 2453 2454port_found: 2455 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid, NULL); 2456 if (ret) 2457 goto out; 2458 2459 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey); 2460 if (ret) 2461 goto out; 2462 2463 id_priv->id.route.addr.dev_addr.dev_type = 2464 (rdma_protocol_ib(cma_dev->device, p)) ? 2465 ARPHRD_INFINIBAND : ARPHRD_ETHER; 2466 2467 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid); 2468 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey); 2469 id_priv->id.port_num = p; 2470 cma_attach_to_dev(id_priv, cma_dev); 2471 cma_set_loopback(cma_src_addr(id_priv)); 2472out: 2473 mutex_unlock(&lock); 2474 return ret; 2475} 2476 2477static void addr_handler(int status, struct sockaddr *src_addr, 2478 struct rdma_dev_addr *dev_addr, void *context) 2479{ 2480 struct rdma_id_private *id_priv = context; 2481 struct rdma_cm_event event; 2482 2483 memset(&event, 0, sizeof event); 2484 mutex_lock(&id_priv->handler_mutex); 2485 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, 2486 RDMA_CM_ADDR_RESOLVED)) 2487 goto out; 2488 2489 memcpy(cma_src_addr(id_priv), src_addr, rdma_addr_size(src_addr)); 2490 if (!status && !id_priv->cma_dev) 2491 status = cma_acquire_dev(id_priv, NULL); 2492 2493 if (status) { 2494 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, 2495 RDMA_CM_ADDR_BOUND)) 2496 goto out; 2497 event.event = RDMA_CM_EVENT_ADDR_ERROR; 2498 event.status = status; 2499 } else 2500 event.event = RDMA_CM_EVENT_ADDR_RESOLVED; 2501 2502 if (id_priv->id.event_handler(&id_priv->id, &event)) { 2503 cma_exch(id_priv, RDMA_CM_DESTROYING); 2504 mutex_unlock(&id_priv->handler_mutex); 2505 cma_deref_id(id_priv); 2506 rdma_destroy_id(&id_priv->id); 2507 return; 2508 } 2509out: 2510 mutex_unlock(&id_priv->handler_mutex); 2511 cma_deref_id(id_priv); 2512} 2513 2514static int cma_resolve_loopback(struct rdma_id_private *id_priv) 2515{ 2516 struct cma_work *work; 2517 union ib_gid gid; 2518 int ret; 2519 2520 work = kzalloc(sizeof *work, GFP_KERNEL); 2521 if (!work) 2522 return -ENOMEM; 2523 2524 if (!id_priv->cma_dev) { 2525 ret = cma_bind_loopback(id_priv); 2526 if (ret) 2527 goto err; 2528 } 2529 2530 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid); 2531 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid); 2532 2533 work->id = id_priv; 2534 INIT_WORK(&work->work, cma_work_handler); 2535 work->old_state = RDMA_CM_ADDR_QUERY; 2536 work->new_state = RDMA_CM_ADDR_RESOLVED; 2537 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED; 2538 queue_work(cma_wq, &work->work); 2539 return 0; 2540err: 2541 kfree(work); 2542 return ret; 2543} 2544 2545static int cma_resolve_ib_addr(struct rdma_id_private *id_priv) 2546{ 2547 struct cma_work *work; 2548 int ret; 2549 2550 work = kzalloc(sizeof *work, GFP_KERNEL); 2551 if (!work) 2552 return -ENOMEM; 2553 2554 if (!id_priv->cma_dev) { 2555 ret = cma_resolve_ib_dev(id_priv); 2556 if (ret) 2557 goto err; 2558 } 2559 2560 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, (union ib_gid *) 2561 &(((struct sockaddr_ib *) &id_priv->id.route.addr.dst_addr)->sib_addr)); 2562 2563 work->id = id_priv; 2564 INIT_WORK(&work->work, cma_work_handler); 2565 work->old_state = RDMA_CM_ADDR_QUERY; 2566 work->new_state = RDMA_CM_ADDR_RESOLVED; 2567 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED; 2568 queue_work(cma_wq, &work->work); 2569 return 0; 2570err: 2571 kfree(work); 2572 return ret; 2573} 2574 2575static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, 2576 struct sockaddr *dst_addr) 2577{ 2578 if (!src_addr || !src_addr->sa_family) { 2579 src_addr = (struct sockaddr *) &id->route.addr.src_addr; 2580 src_addr->sa_family = dst_addr->sa_family; 2581 if (dst_addr->sa_family == AF_INET6) { 2582 struct sockaddr_in6 *src_addr6 = (struct sockaddr_in6 *) src_addr; 2583 struct sockaddr_in6 *dst_addr6 = (struct sockaddr_in6 *) dst_addr; 2584 src_addr6->sin6_scope_id = dst_addr6->sin6_scope_id; 2585 if (ipv6_addr_type(&dst_addr6->sin6_addr) & IPV6_ADDR_LINKLOCAL) 2586 id->route.addr.dev_addr.bound_dev_if = dst_addr6->sin6_scope_id; 2587 } else if (dst_addr->sa_family == AF_IB) { 2588 ((struct sockaddr_ib *) src_addr)->sib_pkey = 2589 ((struct sockaddr_ib *) dst_addr)->sib_pkey; 2590 } 2591 } 2592 return rdma_bind_addr(id, src_addr); 2593} 2594 2595int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, 2596 struct sockaddr *dst_addr, int timeout_ms) 2597{ 2598 struct rdma_id_private *id_priv; 2599 int ret; 2600 2601 id_priv = container_of(id, struct rdma_id_private, id); 2602 if (id_priv->state == RDMA_CM_IDLE) { 2603 ret = cma_bind_addr(id, src_addr, dst_addr); 2604 if (ret) 2605 return ret; 2606 } 2607 2608 if (cma_family(id_priv) != dst_addr->sa_family) 2609 return -EINVAL; 2610 2611 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY)) 2612 return -EINVAL; 2613 2614 atomic_inc(&id_priv->refcount); 2615 memcpy(cma_dst_addr(id_priv), dst_addr, rdma_addr_size(dst_addr)); 2616 if (cma_any_addr(dst_addr)) { 2617 ret = cma_resolve_loopback(id_priv); 2618 } else { 2619 if (dst_addr->sa_family == AF_IB) { 2620 ret = cma_resolve_ib_addr(id_priv); 2621 } else { 2622 ret = rdma_resolve_ip(&addr_client, cma_src_addr(id_priv), 2623 dst_addr, &id->route.addr.dev_addr, 2624 timeout_ms, addr_handler, id_priv); 2625 } 2626 } 2627 if (ret) 2628 goto err; 2629 2630 return 0; 2631err: 2632 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND); 2633 cma_deref_id(id_priv); 2634 return ret; 2635} 2636EXPORT_SYMBOL(rdma_resolve_addr); 2637 2638int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse) 2639{ 2640 struct rdma_id_private *id_priv; 2641 unsigned long flags; 2642 int ret; 2643 2644 id_priv = container_of(id, struct rdma_id_private, id); 2645 spin_lock_irqsave(&id_priv->lock, flags); 2646 if (reuse || id_priv->state == RDMA_CM_IDLE) { 2647 id_priv->reuseaddr = reuse; 2648 ret = 0; 2649 } else { 2650 ret = -EINVAL; 2651 } 2652 spin_unlock_irqrestore(&id_priv->lock, flags); 2653 return ret; 2654} 2655EXPORT_SYMBOL(rdma_set_reuseaddr); 2656 2657int rdma_set_afonly(struct rdma_cm_id *id, int afonly) 2658{ 2659 struct rdma_id_private *id_priv; 2660 unsigned long flags; 2661 int ret; 2662 2663 id_priv = container_of(id, struct rdma_id_private, id); 2664 spin_lock_irqsave(&id_priv->lock, flags); 2665 if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) { 2666 id_priv->options |= (1 << CMA_OPTION_AFONLY); 2667 id_priv->afonly = afonly; 2668 ret = 0; 2669 } else { 2670 ret = -EINVAL; 2671 } 2672 spin_unlock_irqrestore(&id_priv->lock, flags); 2673 return ret; 2674} 2675EXPORT_SYMBOL(rdma_set_afonly); 2676 2677static void cma_bind_port(struct rdma_bind_list *bind_list, 2678 struct rdma_id_private *id_priv) 2679{ 2680 struct sockaddr *addr; 2681 struct sockaddr_ib *sib; 2682 u64 sid, mask; 2683 __be16 port; 2684 2685 addr = cma_src_addr(id_priv); 2686 port = htons(bind_list->port); 2687 2688 switch (addr->sa_family) { 2689 case AF_INET: 2690 ((struct sockaddr_in *) addr)->sin_port = port; 2691 break; 2692 case AF_INET6: 2693 ((struct sockaddr_in6 *) addr)->sin6_port = port; 2694 break; 2695 case AF_IB: 2696 sib = (struct sockaddr_ib *) addr; 2697 sid = be64_to_cpu(sib->sib_sid); 2698 mask = be64_to_cpu(sib->sib_sid_mask); 2699 sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port)); 2700 sib->sib_sid_mask = cpu_to_be64(~0ULL); 2701 break; 2702 } 2703 id_priv->bind_list = bind_list; 2704 hlist_add_head(&id_priv->node, &bind_list->owners); 2705} 2706 2707static int cma_alloc_port(enum rdma_port_space ps, 2708 struct rdma_id_private *id_priv, unsigned short snum) 2709{ 2710 struct rdma_bind_list *bind_list; 2711 int ret; 2712 2713 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL); 2714 if (!bind_list) 2715 return -ENOMEM; 2716 2717 ret = cma_ps_alloc(id_priv->id.route.addr.dev_addr.net, ps, bind_list, 2718 snum); 2719 if (ret < 0) 2720 goto err; 2721 2722 bind_list->ps = ps; 2723 bind_list->port = (unsigned short)ret; 2724 cma_bind_port(bind_list, id_priv); 2725 return 0; 2726err: 2727 kfree(bind_list); 2728 return ret == -ENOSPC ? -EADDRNOTAVAIL : ret; 2729} 2730 2731static int cma_alloc_any_port(enum rdma_port_space ps, 2732 struct rdma_id_private *id_priv) 2733{ 2734 static unsigned int last_used_port; 2735 int low, high, remaining; 2736 unsigned int rover; 2737 struct net *net = id_priv->id.route.addr.dev_addr.net; 2738 2739 inet_get_local_port_range(net, &low, &high); 2740 remaining = (high - low) + 1; 2741 rover = prandom_u32() % remaining + low; 2742retry: 2743 if (last_used_port != rover && 2744 !cma_ps_find(net, ps, (unsigned short)rover)) { 2745 int ret = cma_alloc_port(ps, id_priv, rover); 2746 /* 2747 * Remember previously used port number in order to avoid 2748 * re-using same port immediately after it is closed. 2749 */ 2750 if (!ret) 2751 last_used_port = rover; 2752 if (ret != -EADDRNOTAVAIL) 2753 return ret; 2754 } 2755 if (--remaining) { 2756 rover++; 2757 if ((rover < low) || (rover > high)) 2758 rover = low; 2759 goto retry; 2760 } 2761 return -EADDRNOTAVAIL; 2762} 2763 2764/* 2765 * Check that the requested port is available. This is called when trying to 2766 * bind to a specific port, or when trying to listen on a bound port. In 2767 * the latter case, the provided id_priv may already be on the bind_list, but 2768 * we still need to check that it's okay to start listening. 2769 */ 2770static int cma_check_port(struct rdma_bind_list *bind_list, 2771 struct rdma_id_private *id_priv, uint8_t reuseaddr) 2772{ 2773 struct rdma_id_private *cur_id; 2774 struct sockaddr *addr, *cur_addr; 2775 2776 addr = cma_src_addr(id_priv); 2777 hlist_for_each_entry(cur_id, &bind_list->owners, node) { 2778 if (id_priv == cur_id) 2779 continue; 2780 2781 if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr && 2782 cur_id->reuseaddr) 2783 continue; 2784 2785 cur_addr = cma_src_addr(cur_id); 2786 if (id_priv->afonly && cur_id->afonly && 2787 (addr->sa_family != cur_addr->sa_family)) 2788 continue; 2789 2790 if (cma_any_addr(addr) || cma_any_addr(cur_addr)) 2791 return -EADDRNOTAVAIL; 2792 2793 if (!cma_addr_cmp(addr, cur_addr)) 2794 return -EADDRINUSE; 2795 } 2796 return 0; 2797} 2798 2799static int cma_use_port(enum rdma_port_space ps, 2800 struct rdma_id_private *id_priv) 2801{ 2802 struct rdma_bind_list *bind_list; 2803 unsigned short snum; 2804 int ret; 2805 2806 snum = ntohs(cma_port(cma_src_addr(id_priv))); 2807 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE)) 2808 return -EACCES; 2809 2810 bind_list = cma_ps_find(id_priv->id.route.addr.dev_addr.net, ps, snum); 2811 if (!bind_list) { 2812 ret = cma_alloc_port(ps, id_priv, snum); 2813 } else { 2814 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr); 2815 if (!ret) 2816 cma_bind_port(bind_list, id_priv); 2817 } 2818 return ret; 2819} 2820 2821static int cma_bind_listen(struct rdma_id_private *id_priv) 2822{ 2823 struct rdma_bind_list *bind_list = id_priv->bind_list; 2824 int ret = 0; 2825 2826 mutex_lock(&lock); 2827 if (bind_list->owners.first->next) 2828 ret = cma_check_port(bind_list, id_priv, 0); 2829 mutex_unlock(&lock); 2830 return ret; 2831} 2832 2833static enum rdma_port_space cma_select_inet_ps( 2834 struct rdma_id_private *id_priv) 2835{ 2836 switch (id_priv->id.ps) { 2837 case RDMA_PS_TCP: 2838 case RDMA_PS_UDP: 2839 case RDMA_PS_IPOIB: 2840 case RDMA_PS_IB: 2841 return id_priv->id.ps; 2842 default: 2843 2844 return 0; 2845 } 2846} 2847 2848static enum rdma_port_space cma_select_ib_ps(struct rdma_id_private *id_priv) 2849{ 2850 enum rdma_port_space ps = 0; 2851 struct sockaddr_ib *sib; 2852 u64 sid_ps, mask, sid; 2853 2854 sib = (struct sockaddr_ib *) cma_src_addr(id_priv); 2855 mask = be64_to_cpu(sib->sib_sid_mask) & RDMA_IB_IP_PS_MASK; 2856 sid = be64_to_cpu(sib->sib_sid) & mask; 2857 2858 if ((id_priv->id.ps == RDMA_PS_IB) && (sid == (RDMA_IB_IP_PS_IB & mask))) { 2859 sid_ps = RDMA_IB_IP_PS_IB; 2860 ps = RDMA_PS_IB; 2861 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_TCP)) && 2862 (sid == (RDMA_IB_IP_PS_TCP & mask))) { 2863 sid_ps = RDMA_IB_IP_PS_TCP; 2864 ps = RDMA_PS_TCP; 2865 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_UDP)) && 2866 (sid == (RDMA_IB_IP_PS_UDP & mask))) { 2867 sid_ps = RDMA_IB_IP_PS_UDP; 2868 ps = RDMA_PS_UDP; 2869 } 2870 2871 if (ps) { 2872 sib->sib_sid = cpu_to_be64(sid_ps | ntohs(cma_port((struct sockaddr *) sib))); 2873 sib->sib_sid_mask = cpu_to_be64(RDMA_IB_IP_PS_MASK | 2874 be64_to_cpu(sib->sib_sid_mask)); 2875 } 2876 return ps; 2877} 2878 2879static int cma_get_port(struct rdma_id_private *id_priv) 2880{ 2881 enum rdma_port_space ps; 2882 int ret; 2883 2884 if (cma_family(id_priv) != AF_IB) 2885 ps = cma_select_inet_ps(id_priv); 2886 else 2887 ps = cma_select_ib_ps(id_priv); 2888 if (!ps) 2889 return -EPROTONOSUPPORT; 2890 2891 mutex_lock(&lock); 2892 if (cma_any_port(cma_src_addr(id_priv))) 2893 ret = cma_alloc_any_port(ps, id_priv); 2894 else 2895 ret = cma_use_port(ps, id_priv); 2896 mutex_unlock(&lock); 2897 2898 return ret; 2899} 2900 2901static int cma_check_linklocal(struct rdma_dev_addr *dev_addr, 2902 struct sockaddr *addr) 2903{ 2904#if IS_ENABLED(CONFIG_IPV6) 2905 struct sockaddr_in6 *sin6; 2906 2907 if (addr->sa_family != AF_INET6) 2908 return 0; 2909 2910 sin6 = (struct sockaddr_in6 *) addr; 2911 2912 if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)) 2913 return 0; 2914 2915 if (!sin6->sin6_scope_id) 2916 return -EINVAL; 2917 2918 dev_addr->bound_dev_if = sin6->sin6_scope_id; 2919#endif 2920 return 0; 2921} 2922 2923int rdma_listen(struct rdma_cm_id *id, int backlog) 2924{ 2925 struct rdma_id_private *id_priv; 2926 int ret; 2927 2928 id_priv = container_of(id, struct rdma_id_private, id); 2929 if (id_priv->state == RDMA_CM_IDLE) { 2930 id->route.addr.src_addr.ss_family = AF_INET; 2931 ret = rdma_bind_addr(id, cma_src_addr(id_priv)); 2932 if (ret) 2933 return ret; 2934 } 2935 2936 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN)) 2937 return -EINVAL; 2938 2939 if (id_priv->reuseaddr) { 2940 ret = cma_bind_listen(id_priv); 2941 if (ret) 2942 goto err; 2943 } 2944 2945 id_priv->backlog = backlog; 2946 if (id->device) { 2947 if (rdma_cap_ib_cm(id->device, 1)) { 2948 ret = cma_ib_listen(id_priv); 2949 if (ret) 2950 goto err; 2951 } else if (rdma_cap_iw_cm(id->device, 1)) { 2952 ret = cma_iw_listen(id_priv, backlog); 2953 if (ret) 2954 goto err; 2955 } else { 2956 ret = -ENOSYS; 2957 goto err; 2958 } 2959 } else 2960 cma_listen_on_all(id_priv); 2961 2962 return 0; 2963err: 2964 id_priv->backlog = 0; 2965 cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND); 2966 return ret; 2967} 2968EXPORT_SYMBOL(rdma_listen); 2969 2970int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr) 2971{ 2972 struct rdma_id_private *id_priv; 2973 int ret; 2974 2975 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6 && 2976 addr->sa_family != AF_IB) 2977 return -EAFNOSUPPORT; 2978 2979 id_priv = container_of(id, struct rdma_id_private, id); 2980 if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND)) 2981 return -EINVAL; 2982 2983 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr); 2984 if (ret) 2985 goto err1; 2986 2987 memcpy(cma_src_addr(id_priv), addr, rdma_addr_size(addr)); 2988 if (!cma_any_addr(addr)) { 2989 ret = cma_translate_addr(addr, &id->route.addr.dev_addr); 2990 if (ret) 2991 goto err1; 2992 2993 ret = cma_acquire_dev(id_priv, NULL); 2994 if (ret) 2995 goto err1; 2996 } 2997 2998 if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) { 2999 if (addr->sa_family == AF_INET) 3000 id_priv->afonly = 1; 3001#if IS_ENABLED(CONFIG_IPV6) 3002 else if (addr->sa_family == AF_INET6) { 3003 struct net *net = id_priv->id.route.addr.dev_addr.net; 3004 3005 id_priv->afonly = net->ipv6.sysctl.bindv6only; 3006 } 3007#endif 3008 } 3009 ret = cma_get_port(id_priv); 3010 if (ret) 3011 goto err2; 3012 3013 return 0; 3014err2: 3015 if (id_priv->cma_dev) 3016 cma_release_dev(id_priv); 3017err1: 3018 cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE); 3019 return ret; 3020} 3021EXPORT_SYMBOL(rdma_bind_addr); 3022 3023static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv) 3024{ 3025 struct cma_hdr *cma_hdr; 3026 3027 cma_hdr = hdr; 3028 cma_hdr->cma_version = CMA_VERSION; 3029 if (cma_family(id_priv) == AF_INET) { 3030 struct sockaddr_in *src4, *dst4; 3031 3032 src4 = (struct sockaddr_in *) cma_src_addr(id_priv); 3033 dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv); 3034 3035 cma_set_ip_ver(cma_hdr, 4); 3036 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; 3037 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; 3038 cma_hdr->port = src4->sin_port; 3039 } else if (cma_family(id_priv) == AF_INET6) { 3040 struct sockaddr_in6 *src6, *dst6; 3041 3042 src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv); 3043 dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv); 3044 3045 cma_set_ip_ver(cma_hdr, 6); 3046 cma_hdr->src_addr.ip6 = src6->sin6_addr; 3047 cma_hdr->dst_addr.ip6 = dst6->sin6_addr; 3048 cma_hdr->port = src6->sin6_port; 3049 } 3050 return 0; 3051} 3052 3053static int cma_sidr_rep_handler(struct ib_cm_id *cm_id, 3054 struct ib_cm_event *ib_event) 3055{ 3056 struct rdma_id_private *id_priv = cm_id->context; 3057 struct rdma_cm_event event; 3058 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd; 3059 int ret = 0; 3060 3061 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT)) 3062 return 0; 3063 3064 memset(&event, 0, sizeof event); 3065 switch (ib_event->event) { 3066 case IB_CM_SIDR_REQ_ERROR: 3067 event.event = RDMA_CM_EVENT_UNREACHABLE; 3068 event.status = -ETIMEDOUT; 3069 break; 3070 case IB_CM_SIDR_REP_RECEIVED: 3071 event.param.ud.private_data = ib_event->private_data; 3072 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE; 3073 if (rep->status != IB_SIDR_SUCCESS) { 3074 event.event = RDMA_CM_EVENT_UNREACHABLE; 3075 event.status = ib_event->param.sidr_rep_rcvd.status; 3076 break; 3077 } 3078 ret = cma_set_qkey(id_priv, rep->qkey); 3079 if (ret) { 3080 event.event = RDMA_CM_EVENT_ADDR_ERROR; 3081 event.status = ret; 3082 break; 3083 } 3084 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num, 3085 id_priv->id.route.path_rec, 3086 &event.param.ud.ah_attr); 3087 event.param.ud.qp_num = rep->qpn; 3088 event.param.ud.qkey = rep->qkey; 3089 event.event = RDMA_CM_EVENT_ESTABLISHED; 3090 event.status = 0; 3091 break; 3092 default: 3093 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n", 3094 ib_event->event); 3095 goto out; 3096 } 3097 3098 ret = id_priv->id.event_handler(&id_priv->id, &event); 3099 if (ret) { 3100 /* Destroy the CM ID by returning a non-zero value. */ 3101 id_priv->cm_id.ib = NULL; 3102 cma_exch(id_priv, RDMA_CM_DESTROYING); 3103 mutex_unlock(&id_priv->handler_mutex); 3104 rdma_destroy_id(&id_priv->id); 3105 return ret; 3106 } 3107out: 3108 mutex_unlock(&id_priv->handler_mutex); 3109 return ret; 3110} 3111 3112static int cma_resolve_ib_udp(struct rdma_id_private *id_priv, 3113 struct rdma_conn_param *conn_param) 3114{ 3115 struct ib_cm_sidr_req_param req; 3116 struct ib_cm_id *id; 3117 void *private_data; 3118 int offset, ret; 3119 3120 memset(&req, 0, sizeof req); 3121 offset = cma_user_data_offset(id_priv); 3122 req.private_data_len = offset + conn_param->private_data_len; 3123 if (req.private_data_len < conn_param->private_data_len) 3124 return -EINVAL; 3125 3126 if (req.private_data_len) { 3127 private_data = kzalloc(req.private_data_len, GFP_ATOMIC); 3128 if (!private_data) 3129 return -ENOMEM; 3130 } else { 3131 private_data = NULL; 3132 } 3133 3134 if (conn_param->private_data && conn_param->private_data_len) 3135 memcpy(private_data + offset, conn_param->private_data, 3136 conn_param->private_data_len); 3137 3138 if (private_data) { 3139 ret = cma_format_hdr(private_data, id_priv); 3140 if (ret) 3141 goto out; 3142 req.private_data = private_data; 3143 } 3144 3145 id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler, 3146 id_priv); 3147 if (IS_ERR(id)) { 3148 ret = PTR_ERR(id); 3149 goto out; 3150 } 3151 id_priv->cm_id.ib = id; 3152 3153 req.path = id_priv->id.route.path_rec; 3154 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv)); 3155 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8); 3156 req.max_cm_retries = CMA_MAX_CM_RETRIES; 3157 3158 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req); 3159 if (ret) { 3160 ib_destroy_cm_id(id_priv->cm_id.ib); 3161 id_priv->cm_id.ib = NULL; 3162 } 3163out: 3164 kfree(private_data); 3165 return ret; 3166} 3167 3168static int cma_connect_ib(struct rdma_id_private *id_priv, 3169 struct rdma_conn_param *conn_param) 3170{ 3171 struct ib_cm_req_param req; 3172 struct rdma_route *route; 3173 void *private_data; 3174 struct ib_cm_id *id; 3175 int offset, ret; 3176 3177 memset(&req, 0, sizeof req); 3178 offset = cma_user_data_offset(id_priv); 3179 req.private_data_len = offset + conn_param->private_data_len; 3180 if (req.private_data_len < conn_param->private_data_len) 3181 return -EINVAL; 3182 3183 if (req.private_data_len) { 3184 private_data = kzalloc(req.private_data_len, GFP_ATOMIC); 3185 if (!private_data) 3186 return -ENOMEM; 3187 } else { 3188 private_data = NULL; 3189 } 3190 3191 if (conn_param->private_data && conn_param->private_data_len) 3192 memcpy(private_data + offset, conn_param->private_data, 3193 conn_param->private_data_len); 3194 3195 id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv); 3196 if (IS_ERR(id)) { 3197 ret = PTR_ERR(id); 3198 goto out; 3199 } 3200 id_priv->cm_id.ib = id; 3201 3202 route = &id_priv->id.route; 3203 if (private_data) { 3204 ret = cma_format_hdr(private_data, id_priv); 3205 if (ret) 3206 goto out; 3207 req.private_data = private_data; 3208 } 3209 3210 req.primary_path = &route->path_rec[0]; 3211 if (route->num_paths == 2) 3212 req.alternate_path = &route->path_rec[1]; 3213 3214 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv)); 3215 req.qp_num = id_priv->qp_num; 3216 req.qp_type = id_priv->id.qp_type; 3217 req.starting_psn = id_priv->seq_num; 3218 req.responder_resources = conn_param->responder_resources; 3219 req.initiator_depth = conn_param->initiator_depth; 3220 req.flow_control = conn_param->flow_control; 3221 req.retry_count = min_t(u8, 7, conn_param->retry_count); 3222 req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count); 3223 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; 3224 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; 3225 req.max_cm_retries = CMA_MAX_CM_RETRIES; 3226 req.srq = id_priv->srq ? 1 : 0; 3227 3228 ret = ib_send_cm_req(id_priv->cm_id.ib, &req); 3229out: 3230 if (ret && !IS_ERR(id)) { 3231 ib_destroy_cm_id(id); 3232 id_priv->cm_id.ib = NULL; 3233 } 3234 3235 kfree(private_data); 3236 return ret; 3237} 3238 3239static int cma_connect_iw(struct rdma_id_private *id_priv, 3240 struct rdma_conn_param *conn_param) 3241{ 3242 struct iw_cm_id *cm_id; 3243 int ret; 3244 struct iw_cm_conn_param iw_param; 3245 3246 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv); 3247 if (IS_ERR(cm_id)) 3248 return PTR_ERR(cm_id); 3249 3250 cm_id->tos = id_priv->tos; 3251 id_priv->cm_id.iw = cm_id; 3252 3253 memcpy(&cm_id->local_addr, cma_src_addr(id_priv), 3254 rdma_addr_size(cma_src_addr(id_priv))); 3255 memcpy(&cm_id->remote_addr, cma_dst_addr(id_priv), 3256 rdma_addr_size(cma_dst_addr(id_priv))); 3257 3258 ret = cma_modify_qp_rtr(id_priv, conn_param); 3259 if (ret) 3260 goto out; 3261 3262 if (conn_param) { 3263 iw_param.ord = conn_param->initiator_depth; 3264 iw_param.ird = conn_param->responder_resources; 3265 iw_param.private_data = conn_param->private_data; 3266 iw_param.private_data_len = conn_param->private_data_len; 3267 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num; 3268 } else { 3269 memset(&iw_param, 0, sizeof iw_param); 3270 iw_param.qpn = id_priv->qp_num; 3271 } 3272 ret = iw_cm_connect(cm_id, &iw_param); 3273out: 3274 if (ret) { 3275 iw_destroy_cm_id(cm_id); 3276 id_priv->cm_id.iw = NULL; 3277 } 3278 return ret; 3279} 3280 3281int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) 3282{ 3283 struct rdma_id_private *id_priv; 3284 int ret; 3285 3286 id_priv = container_of(id, struct rdma_id_private, id); 3287 if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT)) 3288 return -EINVAL; 3289 3290 if (!id->qp) { 3291 id_priv->qp_num = conn_param->qp_num; 3292 id_priv->srq = conn_param->srq; 3293 } 3294 3295 if (rdma_cap_ib_cm(id->device, id->port_num)) { 3296 if (id->qp_type == IB_QPT_UD) 3297 ret = cma_resolve_ib_udp(id_priv, conn_param); 3298 else 3299 ret = cma_connect_ib(id_priv, conn_param); 3300 } else if (rdma_cap_iw_cm(id->device, id->port_num)) 3301 ret = cma_connect_iw(id_priv, conn_param); 3302 else 3303 ret = -ENOSYS; 3304 if (ret) 3305 goto err; 3306 3307 return 0; 3308err: 3309 cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED); 3310 return ret; 3311} 3312EXPORT_SYMBOL(rdma_connect); 3313 3314static int cma_accept_ib(struct rdma_id_private *id_priv, 3315 struct rdma_conn_param *conn_param) 3316{ 3317 struct ib_cm_rep_param rep; 3318 int ret; 3319 3320 ret = cma_modify_qp_rtr(id_priv, conn_param); 3321 if (ret) 3322 goto out; 3323 3324 ret = cma_modify_qp_rts(id_priv, conn_param); 3325 if (ret) 3326 goto out; 3327 3328 memset(&rep, 0, sizeof rep); 3329 rep.qp_num = id_priv->qp_num; 3330 rep.starting_psn = id_priv->seq_num; 3331 rep.private_data = conn_param->private_data; 3332 rep.private_data_len = conn_param->private_data_len; 3333 rep.responder_resources = conn_param->responder_resources; 3334 rep.initiator_depth = conn_param->initiator_depth; 3335 rep.failover_accepted = 0; 3336 rep.flow_control = conn_param->flow_control; 3337 rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count); 3338 rep.srq = id_priv->srq ? 1 : 0; 3339 3340 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep); 3341out: 3342 return ret; 3343} 3344 3345static int cma_accept_iw(struct rdma_id_private *id_priv, 3346 struct rdma_conn_param *conn_param) 3347{ 3348 struct iw_cm_conn_param iw_param; 3349 int ret; 3350 3351 ret = cma_modify_qp_rtr(id_priv, conn_param); 3352 if (ret) 3353 return ret; 3354 3355 iw_param.ord = conn_param->initiator_depth; 3356 iw_param.ird = conn_param->responder_resources; 3357 iw_param.private_data = conn_param->private_data; 3358 iw_param.private_data_len = conn_param->private_data_len; 3359 if (id_priv->id.qp) { 3360 iw_param.qpn = id_priv->qp_num; 3361 } else 3362 iw_param.qpn = conn_param->qp_num; 3363 3364 return iw_cm_accept(id_priv->cm_id.iw, &iw_param); 3365} 3366 3367static int cma_send_sidr_rep(struct rdma_id_private *id_priv, 3368 enum ib_cm_sidr_status status, u32 qkey, 3369 const void *private_data, int private_data_len) 3370{ 3371 struct ib_cm_sidr_rep_param rep; 3372 int ret; 3373 3374 memset(&rep, 0, sizeof rep); 3375 rep.status = status; 3376 if (status == IB_SIDR_SUCCESS) { 3377 ret = cma_set_qkey(id_priv, qkey); 3378 if (ret) 3379 return ret; 3380 rep.qp_num = id_priv->qp_num; 3381 rep.qkey = id_priv->qkey; 3382 } 3383 rep.private_data = private_data; 3384 rep.private_data_len = private_data_len; 3385 3386 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep); 3387} 3388 3389int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) 3390{ 3391 struct rdma_id_private *id_priv; 3392 int ret; 3393 3394 id_priv = container_of(id, struct rdma_id_private, id); 3395 3396 id_priv->owner = task_pid_nr(current); 3397 3398 if (!cma_comp(id_priv, RDMA_CM_CONNECT)) 3399 return -EINVAL; 3400 3401 if (!id->qp && conn_param) { 3402 id_priv->qp_num = conn_param->qp_num; 3403 id_priv->srq = conn_param->srq; 3404 } 3405 3406 if (rdma_cap_ib_cm(id->device, id->port_num)) { 3407 if (id->qp_type == IB_QPT_UD) { 3408 if (conn_param) 3409 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS, 3410 conn_param->qkey, 3411 conn_param->private_data, 3412 conn_param->private_data_len); 3413 else 3414 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS, 3415 0, NULL, 0); 3416 } else { 3417 if (conn_param) 3418 ret = cma_accept_ib(id_priv, conn_param); 3419 else 3420 ret = cma_rep_recv(id_priv); 3421 } 3422 } else if (rdma_cap_iw_cm(id->device, id->port_num)) 3423 ret = cma_accept_iw(id_priv, conn_param); 3424 else 3425 ret = -ENOSYS; 3426 3427 if (ret) 3428 goto reject; 3429 3430 return 0; 3431reject: 3432 cma_modify_qp_err(id_priv); 3433 rdma_reject(id, NULL, 0); 3434 return ret; 3435} 3436EXPORT_SYMBOL(rdma_accept); 3437 3438int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event) 3439{ 3440 struct rdma_id_private *id_priv; 3441 int ret; 3442 3443 id_priv = container_of(id, struct rdma_id_private, id); 3444 if (!id_priv->cm_id.ib) 3445 return -EINVAL; 3446 3447 switch (id->device->node_type) { 3448 case RDMA_NODE_IB_CA: 3449 ret = ib_cm_notify(id_priv->cm_id.ib, event); 3450 break; 3451 default: 3452 ret = 0; 3453 break; 3454 } 3455 return ret; 3456} 3457EXPORT_SYMBOL(rdma_notify); 3458 3459int rdma_reject(struct rdma_cm_id *id, const void *private_data, 3460 u8 private_data_len) 3461{ 3462 struct rdma_id_private *id_priv; 3463 int ret; 3464 3465 id_priv = container_of(id, struct rdma_id_private, id); 3466 if (!id_priv->cm_id.ib) 3467 return -EINVAL; 3468 3469 if (rdma_cap_ib_cm(id->device, id->port_num)) { 3470 if (id->qp_type == IB_QPT_UD) 3471 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0, 3472 private_data, private_data_len); 3473 else 3474 ret = ib_send_cm_rej(id_priv->cm_id.ib, 3475 IB_CM_REJ_CONSUMER_DEFINED, NULL, 3476 0, private_data, private_data_len); 3477 } else if (rdma_cap_iw_cm(id->device, id->port_num)) { 3478 ret = iw_cm_reject(id_priv->cm_id.iw, 3479 private_data, private_data_len); 3480 } else 3481 ret = -ENOSYS; 3482 3483 return ret; 3484} 3485EXPORT_SYMBOL(rdma_reject); 3486 3487int rdma_disconnect(struct rdma_cm_id *id) 3488{ 3489 struct rdma_id_private *id_priv; 3490 int ret; 3491 3492 id_priv = container_of(id, struct rdma_id_private, id); 3493 if (!id_priv->cm_id.ib) 3494 return -EINVAL; 3495 3496 if (rdma_cap_ib_cm(id->device, id->port_num)) { 3497 ret = cma_modify_qp_err(id_priv); 3498 if (ret) 3499 goto out; 3500 /* Initiate or respond to a disconnect. */ 3501 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0)) 3502 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0); 3503 } else if (rdma_cap_iw_cm(id->device, id->port_num)) { 3504 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0); 3505 } else 3506 ret = -EINVAL; 3507 3508out: 3509 return ret; 3510} 3511EXPORT_SYMBOL(rdma_disconnect); 3512 3513static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast) 3514{ 3515 struct rdma_id_private *id_priv; 3516 struct cma_multicast *mc = multicast->context; 3517 struct rdma_cm_event event; 3518 int ret; 3519 3520 id_priv = mc->id_priv; 3521 if (cma_disable_callback(id_priv, RDMA_CM_ADDR_BOUND) && 3522 cma_disable_callback(id_priv, RDMA_CM_ADDR_RESOLVED)) 3523 return 0; 3524 3525 if (!status) 3526 status = cma_set_qkey(id_priv, be32_to_cpu(multicast->rec.qkey)); 3527 mutex_lock(&id_priv->qp_mutex); 3528 if (!status && id_priv->id.qp) 3529 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid, 3530 be16_to_cpu(multicast->rec.mlid)); 3531 mutex_unlock(&id_priv->qp_mutex); 3532 3533 memset(&event, 0, sizeof event); 3534 event.status = status; 3535 event.param.ud.private_data = mc->context; 3536 if (!status) { 3537 event.event = RDMA_CM_EVENT_MULTICAST_JOIN; 3538 ib_init_ah_from_mcmember(id_priv->id.device, 3539 id_priv->id.port_num, &multicast->rec, 3540 &event.param.ud.ah_attr); 3541 event.param.ud.qp_num = 0xFFFFFF; 3542 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey); 3543 } else 3544 event.event = RDMA_CM_EVENT_MULTICAST_ERROR; 3545 3546 ret = id_priv->id.event_handler(&id_priv->id, &event); 3547 if (ret) { 3548 cma_exch(id_priv, RDMA_CM_DESTROYING); 3549 mutex_unlock(&id_priv->handler_mutex); 3550 rdma_destroy_id(&id_priv->id); 3551 return 0; 3552 } 3553 3554 mutex_unlock(&id_priv->handler_mutex); 3555 return 0; 3556} 3557 3558static void cma_set_mgid(struct rdma_id_private *id_priv, 3559 struct sockaddr *addr, union ib_gid *mgid) 3560{ 3561 unsigned char mc_map[MAX_ADDR_LEN]; 3562 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 3563 struct sockaddr_in *sin = (struct sockaddr_in *) addr; 3564 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr; 3565 3566 if (cma_any_addr(addr)) { 3567 memset(mgid, 0, sizeof *mgid); 3568 } else if ((addr->sa_family == AF_INET6) && 3569 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) == 3570 0xFF10A01B)) { 3571 /* IPv6 address is an SA assigned MGID. */ 3572 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid); 3573 } else if (addr->sa_family == AF_IB) { 3574 memcpy(mgid, &((struct sockaddr_ib *) addr)->sib_addr, sizeof *mgid); 3575 } else if ((addr->sa_family == AF_INET6)) { 3576 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map); 3577 if (id_priv->id.ps == RDMA_PS_UDP) 3578 mc_map[7] = 0x01; /* Use RDMA CM signature */ 3579 *mgid = *(union ib_gid *) (mc_map + 4); 3580 } else { 3581 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map); 3582 if (id_priv->id.ps == RDMA_PS_UDP) 3583 mc_map[7] = 0x01; /* Use RDMA CM signature */ 3584 *mgid = *(union ib_gid *) (mc_map + 4); 3585 } 3586} 3587 3588static int cma_join_ib_multicast(struct rdma_id_private *id_priv, 3589 struct cma_multicast *mc) 3590{ 3591 struct ib_sa_mcmember_rec rec; 3592 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 3593 ib_sa_comp_mask comp_mask; 3594 int ret; 3595 3596 ib_addr_get_mgid(dev_addr, &rec.mgid); 3597 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num, 3598 &rec.mgid, &rec); 3599 if (ret) 3600 return ret; 3601 3602 ret = cma_set_qkey(id_priv, 0); 3603 if (ret) 3604 return ret; 3605 3606 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid); 3607 rec.qkey = cpu_to_be32(id_priv->qkey); 3608 rdma_addr_get_sgid(dev_addr, &rec.port_gid); 3609 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); 3610 rec.join_state = 1; 3611 3612 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID | 3613 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE | 3614 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL | 3615 IB_SA_MCMEMBER_REC_FLOW_LABEL | 3616 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS; 3617 3618 if (id_priv->id.ps == RDMA_PS_IPOIB) 3619 comp_mask |= IB_SA_MCMEMBER_REC_RATE | 3620 IB_SA_MCMEMBER_REC_RATE_SELECTOR | 3621 IB_SA_MCMEMBER_REC_MTU_SELECTOR | 3622 IB_SA_MCMEMBER_REC_MTU | 3623 IB_SA_MCMEMBER_REC_HOP_LIMIT; 3624 3625 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device, 3626 id_priv->id.port_num, &rec, 3627 comp_mask, GFP_KERNEL, 3628 cma_ib_mc_handler, mc); 3629 return PTR_ERR_OR_ZERO(mc->multicast.ib); 3630} 3631 3632static void iboe_mcast_work_handler(struct work_struct *work) 3633{ 3634 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work); 3635 struct cma_multicast *mc = mw->mc; 3636 struct ib_sa_multicast *m = mc->multicast.ib; 3637 3638 mc->multicast.ib->context = mc; 3639 cma_ib_mc_handler(0, m); 3640 kref_put(&mc->mcref, release_mc); 3641 kfree(mw); 3642} 3643 3644static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid) 3645{ 3646 struct sockaddr_in *sin = (struct sockaddr_in *)addr; 3647 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr; 3648 3649 if (cma_any_addr(addr)) { 3650 memset(mgid, 0, sizeof *mgid); 3651 } else if (addr->sa_family == AF_INET6) { 3652 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid); 3653 } else { 3654 mgid->raw[0] = 0xff; 3655 mgid->raw[1] = 0x0e; 3656 mgid->raw[2] = 0; 3657 mgid->raw[3] = 0; 3658 mgid->raw[4] = 0; 3659 mgid->raw[5] = 0; 3660 mgid->raw[6] = 0; 3661 mgid->raw[7] = 0; 3662 mgid->raw[8] = 0; 3663 mgid->raw[9] = 0; 3664 mgid->raw[10] = 0xff; 3665 mgid->raw[11] = 0xff; 3666 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr; 3667 } 3668} 3669 3670static int cma_iboe_join_multicast(struct rdma_id_private *id_priv, 3671 struct cma_multicast *mc) 3672{ 3673 struct iboe_mcast_work *work; 3674 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 3675 int err; 3676 struct sockaddr *addr = (struct sockaddr *)&mc->addr; 3677 struct net_device *ndev = NULL; 3678 3679 if (cma_zero_addr((struct sockaddr *)&mc->addr)) 3680 return -EINVAL; 3681 3682 work = kzalloc(sizeof *work, GFP_KERNEL); 3683 if (!work) 3684 return -ENOMEM; 3685 3686 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL); 3687 if (!mc->multicast.ib) { 3688 err = -ENOMEM; 3689 goto out1; 3690 } 3691 3692 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid); 3693 3694 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff); 3695 if (id_priv->id.ps == RDMA_PS_UDP) 3696 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY); 3697 3698 if (dev_addr->bound_dev_if) 3699 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if); 3700 if (!ndev) { 3701 err = -ENODEV; 3702 goto out2; 3703 } 3704 mc->multicast.ib->rec.rate = iboe_get_rate(ndev); 3705 mc->multicast.ib->rec.hop_limit = 1; 3706 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu); 3707 dev_put(ndev); 3708 if (!mc->multicast.ib->rec.mtu) { 3709 err = -EINVAL; 3710 goto out2; 3711 } 3712 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr, 3713 &mc->multicast.ib->rec.port_gid); 3714 work->id = id_priv; 3715 work->mc = mc; 3716 INIT_WORK(&work->work, iboe_mcast_work_handler); 3717 kref_get(&mc->mcref); 3718 queue_work(cma_wq, &work->work); 3719 3720 return 0; 3721 3722out2: 3723 kfree(mc->multicast.ib); 3724out1: 3725 kfree(work); 3726 return err; 3727} 3728 3729int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr, 3730 void *context) 3731{ 3732 struct rdma_id_private *id_priv; 3733 struct cma_multicast *mc; 3734 int ret; 3735 3736 id_priv = container_of(id, struct rdma_id_private, id); 3737 if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) && 3738 !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED)) 3739 return -EINVAL; 3740 3741 mc = kmalloc(sizeof *mc, GFP_KERNEL); 3742 if (!mc) 3743 return -ENOMEM; 3744 3745 memcpy(&mc->addr, addr, rdma_addr_size(addr)); 3746 mc->context = context; 3747 mc->id_priv = id_priv; 3748 3749 spin_lock(&id_priv->lock); 3750 list_add(&mc->list, &id_priv->mc_list); 3751 spin_unlock(&id_priv->lock); 3752 3753 if (rdma_protocol_roce(id->device, id->port_num)) { 3754 kref_init(&mc->mcref); 3755 ret = cma_iboe_join_multicast(id_priv, mc); 3756 } else if (rdma_cap_ib_mcast(id->device, id->port_num)) 3757 ret = cma_join_ib_multicast(id_priv, mc); 3758 else 3759 ret = -ENOSYS; 3760 3761 if (ret) { 3762 spin_lock_irq(&id_priv->lock); 3763 list_del(&mc->list); 3764 spin_unlock_irq(&id_priv->lock); 3765 kfree(mc); 3766 } 3767 return ret; 3768} 3769EXPORT_SYMBOL(rdma_join_multicast); 3770 3771void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr) 3772{ 3773 struct rdma_id_private *id_priv; 3774 struct cma_multicast *mc; 3775 3776 id_priv = container_of(id, struct rdma_id_private, id); 3777 spin_lock_irq(&id_priv->lock); 3778 list_for_each_entry(mc, &id_priv->mc_list, list) { 3779 if (!memcmp(&mc->addr, addr, rdma_addr_size(addr))) { 3780 list_del(&mc->list); 3781 spin_unlock_irq(&id_priv->lock); 3782 3783 if (id->qp) 3784 ib_detach_mcast(id->qp, 3785 &mc->multicast.ib->rec.mgid, 3786 be16_to_cpu(mc->multicast.ib->rec.mlid)); 3787 3788 BUG_ON(id_priv->cma_dev->device != id->device); 3789 3790 if (rdma_cap_ib_mcast(id->device, id->port_num)) { 3791 ib_sa_free_multicast(mc->multicast.ib); 3792 kfree(mc); 3793 } else if (rdma_protocol_roce(id->device, id->port_num)) 3794 kref_put(&mc->mcref, release_mc); 3795 3796 return; 3797 } 3798 } 3799 spin_unlock_irq(&id_priv->lock); 3800} 3801EXPORT_SYMBOL(rdma_leave_multicast); 3802 3803static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv) 3804{ 3805 struct rdma_dev_addr *dev_addr; 3806 struct cma_ndev_work *work; 3807 3808 dev_addr = &id_priv->id.route.addr.dev_addr; 3809 3810 if ((dev_addr->bound_dev_if == ndev->ifindex) && 3811 (net_eq(dev_net(ndev), dev_addr->net)) && 3812 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) { 3813 printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n", 3814 ndev->name, &id_priv->id); 3815 work = kzalloc(sizeof *work, GFP_KERNEL); 3816 if (!work) 3817 return -ENOMEM; 3818 3819 INIT_WORK(&work->work, cma_ndev_work_handler); 3820 work->id = id_priv; 3821 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE; 3822 atomic_inc(&id_priv->refcount); 3823 queue_work(cma_wq, &work->work); 3824 } 3825 3826 return 0; 3827} 3828 3829static int cma_netdev_callback(struct notifier_block *self, unsigned long event, 3830 void *ptr) 3831{ 3832 struct net_device *ndev = netdev_notifier_info_to_dev(ptr); 3833 struct cma_device *cma_dev; 3834 struct rdma_id_private *id_priv; 3835 int ret = NOTIFY_DONE; 3836 3837 if (event != NETDEV_BONDING_FAILOVER) 3838 return NOTIFY_DONE; 3839 3840 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING)) 3841 return NOTIFY_DONE; 3842 3843 mutex_lock(&lock); 3844 list_for_each_entry(cma_dev, &dev_list, list) 3845 list_for_each_entry(id_priv, &cma_dev->id_list, list) { 3846 ret = cma_netdev_change(ndev, id_priv); 3847 if (ret) 3848 goto out; 3849 } 3850 3851out: 3852 mutex_unlock(&lock); 3853 return ret; 3854} 3855 3856static struct notifier_block cma_nb = { 3857 .notifier_call = cma_netdev_callback 3858}; 3859 3860static void cma_add_one(struct ib_device *device) 3861{ 3862 struct cma_device *cma_dev; 3863 struct rdma_id_private *id_priv; 3864 3865 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL); 3866 if (!cma_dev) 3867 return; 3868 3869 cma_dev->device = device; 3870 3871 init_completion(&cma_dev->comp); 3872 atomic_set(&cma_dev->refcount, 1); 3873 INIT_LIST_HEAD(&cma_dev->id_list); 3874 ib_set_client_data(device, &cma_client, cma_dev); 3875 3876 mutex_lock(&lock); 3877 list_add_tail(&cma_dev->list, &dev_list); 3878 list_for_each_entry(id_priv, &listen_any_list, list) 3879 cma_listen_on_dev(id_priv, cma_dev); 3880 mutex_unlock(&lock); 3881} 3882 3883static int cma_remove_id_dev(struct rdma_id_private *id_priv) 3884{ 3885 struct rdma_cm_event event; 3886 enum rdma_cm_state state; 3887 int ret = 0; 3888 3889 /* Record that we want to remove the device */ 3890 state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL); 3891 if (state == RDMA_CM_DESTROYING) 3892 return 0; 3893 3894 cma_cancel_operation(id_priv, state); 3895 mutex_lock(&id_priv->handler_mutex); 3896 3897 /* Check for destruction from another callback. */ 3898 if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL)) 3899 goto out; 3900 3901 memset(&event, 0, sizeof event); 3902 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL; 3903 ret = id_priv->id.event_handler(&id_priv->id, &event); 3904out: 3905 mutex_unlock(&id_priv->handler_mutex); 3906 return ret; 3907} 3908 3909static void cma_process_remove(struct cma_device *cma_dev) 3910{ 3911 struct rdma_id_private *id_priv; 3912 int ret; 3913 3914 mutex_lock(&lock); 3915 while (!list_empty(&cma_dev->id_list)) { 3916 id_priv = list_entry(cma_dev->id_list.next, 3917 struct rdma_id_private, list); 3918 3919 list_del(&id_priv->listen_list); 3920 list_del_init(&id_priv->list); 3921 atomic_inc(&id_priv->refcount); 3922 mutex_unlock(&lock); 3923 3924 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv); 3925 cma_deref_id(id_priv); 3926 if (ret) 3927 rdma_destroy_id(&id_priv->id); 3928 3929 mutex_lock(&lock); 3930 } 3931 mutex_unlock(&lock); 3932 3933 cma_deref_dev(cma_dev); 3934 wait_for_completion(&cma_dev->comp); 3935} 3936 3937static void cma_remove_one(struct ib_device *device, void *client_data) 3938{ 3939 struct cma_device *cma_dev = client_data; 3940 3941 if (!cma_dev) 3942 return; 3943 3944 mutex_lock(&lock); 3945 list_del(&cma_dev->list); 3946 mutex_unlock(&lock); 3947 3948 cma_process_remove(cma_dev); 3949 kfree(cma_dev); 3950} 3951 3952static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb) 3953{ 3954 struct nlmsghdr *nlh; 3955 struct rdma_cm_id_stats *id_stats; 3956 struct rdma_id_private *id_priv; 3957 struct rdma_cm_id *id = NULL; 3958 struct cma_device *cma_dev; 3959 int i_dev = 0, i_id = 0; 3960 3961 /* 3962 * We export all of the IDs as a sequence of messages. Each 3963 * ID gets its own netlink message. 3964 */ 3965 mutex_lock(&lock); 3966 3967 list_for_each_entry(cma_dev, &dev_list, list) { 3968 if (i_dev < cb->args[0]) { 3969 i_dev++; 3970 continue; 3971 } 3972 3973 i_id = 0; 3974 list_for_each_entry(id_priv, &cma_dev->id_list, list) { 3975 if (i_id < cb->args[1]) { 3976 i_id++; 3977 continue; 3978 } 3979 3980 id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq, 3981 sizeof *id_stats, RDMA_NL_RDMA_CM, 3982 RDMA_NL_RDMA_CM_ID_STATS, 3983 NLM_F_MULTI); 3984 if (!id_stats) 3985 goto out; 3986 3987 memset(id_stats, 0, sizeof *id_stats); 3988 id = &id_priv->id; 3989 id_stats->node_type = id->route.addr.dev_addr.dev_type; 3990 id_stats->port_num = id->port_num; 3991 id_stats->bound_dev_if = 3992 id->route.addr.dev_addr.bound_dev_if; 3993 3994 if (ibnl_put_attr(skb, nlh, 3995 rdma_addr_size(cma_src_addr(id_priv)), 3996 cma_src_addr(id_priv), 3997 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR)) 3998 goto out; 3999 if (ibnl_put_attr(skb, nlh, 4000 rdma_addr_size(cma_src_addr(id_priv)), 4001 cma_dst_addr(id_priv), 4002 RDMA_NL_RDMA_CM_ATTR_DST_ADDR)) 4003 goto out; 4004 4005 id_stats->pid = id_priv->owner; 4006 id_stats->port_space = id->ps; 4007 id_stats->cm_state = id_priv->state; 4008 id_stats->qp_num = id_priv->qp_num; 4009 id_stats->qp_type = id->qp_type; 4010 4011 i_id++; 4012 } 4013 4014 cb->args[1] = 0; 4015 i_dev++; 4016 } 4017 4018out: 4019 mutex_unlock(&lock); 4020 cb->args[0] = i_dev; 4021 cb->args[1] = i_id; 4022 4023 return skb->len; 4024} 4025 4026static const struct ibnl_client_cbs cma_cb_table[] = { 4027 [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats, 4028 .module = THIS_MODULE }, 4029}; 4030 4031static int cma_init_net(struct net *net) 4032{ 4033 struct cma_pernet *pernet = cma_pernet(net); 4034 4035 idr_init(&pernet->tcp_ps); 4036 idr_init(&pernet->udp_ps); 4037 idr_init(&pernet->ipoib_ps); 4038 idr_init(&pernet->ib_ps); 4039 4040 return 0; 4041} 4042 4043static void cma_exit_net(struct net *net) 4044{ 4045 struct cma_pernet *pernet = cma_pernet(net); 4046 4047 idr_destroy(&pernet->tcp_ps); 4048 idr_destroy(&pernet->udp_ps); 4049 idr_destroy(&pernet->ipoib_ps); 4050 idr_destroy(&pernet->ib_ps); 4051} 4052 4053static struct pernet_operations cma_pernet_operations = { 4054 .init = cma_init_net, 4055 .exit = cma_exit_net, 4056 .id = &cma_pernet_id, 4057 .size = sizeof(struct cma_pernet), 4058}; 4059 4060static int __init cma_init(void) 4061{ 4062 int ret; 4063 4064 cma_wq = create_singlethread_workqueue("rdma_cm"); 4065 if (!cma_wq) 4066 return -ENOMEM; 4067 4068 ret = register_pernet_subsys(&cma_pernet_operations); 4069 if (ret) 4070 goto err_wq; 4071 4072 ib_sa_register_client(&sa_client); 4073 rdma_addr_register_client(&addr_client); 4074 register_netdevice_notifier(&cma_nb); 4075 4076 ret = ib_register_client(&cma_client); 4077 if (ret) 4078 goto err; 4079 4080 if (ibnl_add_client(RDMA_NL_RDMA_CM, RDMA_NL_RDMA_CM_NUM_OPS, cma_cb_table)) 4081 printk(KERN_WARNING "RDMA CMA: failed to add netlink callback\n"); 4082 4083 return 0; 4084 4085err: 4086 unregister_netdevice_notifier(&cma_nb); 4087 rdma_addr_unregister_client(&addr_client); 4088 ib_sa_unregister_client(&sa_client); 4089err_wq: 4090 destroy_workqueue(cma_wq); 4091 return ret; 4092} 4093 4094static void __exit cma_cleanup(void) 4095{ 4096 ibnl_remove_client(RDMA_NL_RDMA_CM); 4097 ib_unregister_client(&cma_client); 4098 unregister_netdevice_notifier(&cma_nb); 4099 rdma_addr_unregister_client(&addr_client); 4100 ib_sa_unregister_client(&sa_client); 4101 unregister_pernet_subsys(&cma_pernet_operations); 4102 destroy_workqueue(cma_wq); 4103} 4104 4105module_init(cma_init); 4106module_exit(cma_cleanup); 4107