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/tcp.h> 48 #include <net/ipv6.h> 49 50 #include <rdma/rdma_cm.h> 51 #include <rdma/rdma_cm_ib.h> 52 #include <rdma/rdma_netlink.h> 53 #include <rdma/ib.h> 54 #include <rdma/ib_cache.h> 55 #include <rdma/ib_cm.h> 56 #include <rdma/ib_sa.h> 57 #include <rdma/iw_cm.h> 58 59 MODULE_AUTHOR("Sean Hefty"); 60 MODULE_DESCRIPTION("Generic RDMA CM Agent"); 61 MODULE_LICENSE("Dual BSD/GPL"); 62 63 #define CMA_CM_RESPONSE_TIMEOUT 20 64 #define CMA_MAX_CM_RETRIES 15 65 #define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24) 66 #define CMA_IBOE_PACKET_LIFETIME 18 67 68 static void cma_add_one(struct ib_device *device); 69 static void cma_remove_one(struct ib_device *device); 70 71 static struct ib_client cma_client = { 72 .name = "cma", 73 .add = cma_add_one, 74 .remove = cma_remove_one 75 }; 76 77 static struct ib_sa_client sa_client; 78 static struct rdma_addr_client addr_client; 79 static LIST_HEAD(dev_list); 80 static LIST_HEAD(listen_any_list); 81 static DEFINE_MUTEX(lock); 82 static struct workqueue_struct *cma_wq; 83 static DEFINE_IDR(tcp_ps); 84 static DEFINE_IDR(udp_ps); 85 static DEFINE_IDR(ipoib_ps); 86 static DEFINE_IDR(ib_ps); 87 88 struct cma_device { 89 struct list_head list; 90 struct ib_device *device; 91 struct completion comp; 92 atomic_t refcount; 93 struct list_head id_list; 94 }; 95 96 struct rdma_bind_list { 97 struct idr *ps; 98 struct hlist_head owners; 99 unsigned short port; 100 }; 101 102 enum { 103 CMA_OPTION_AFONLY, 104 }; 105 106 /* 107 * Device removal can occur at anytime, so we need extra handling to 108 * serialize notifying the user of device removal with other callbacks. 109 * We do this by disabling removal notification while a callback is in process, 110 * and reporting it after the callback completes. 111 */ 112 struct rdma_id_private { 113 struct rdma_cm_id id; 114 115 struct rdma_bind_list *bind_list; 116 struct hlist_node node; 117 struct list_head list; /* listen_any_list or cma_device.list */ 118 struct list_head listen_list; /* per device listens */ 119 struct cma_device *cma_dev; 120 struct list_head mc_list; 121 122 int internal_id; 123 enum rdma_cm_state state; 124 spinlock_t lock; 125 struct mutex qp_mutex; 126 127 struct completion comp; 128 atomic_t refcount; 129 struct mutex handler_mutex; 130 131 int backlog; 132 int timeout_ms; 133 struct ib_sa_query *query; 134 int query_id; 135 union { 136 struct ib_cm_id *ib; 137 struct iw_cm_id *iw; 138 } cm_id; 139 140 u32 seq_num; 141 u32 qkey; 142 u32 qp_num; 143 pid_t owner; 144 u32 options; 145 u8 srq; 146 u8 tos; 147 u8 reuseaddr; 148 u8 afonly; 149 }; 150 151 struct cma_multicast { 152 struct rdma_id_private *id_priv; 153 union { 154 struct ib_sa_multicast *ib; 155 } multicast; 156 struct list_head list; 157 void *context; 158 struct sockaddr_storage addr; 159 struct kref mcref; 160 }; 161 162 struct cma_work { 163 struct work_struct work; 164 struct rdma_id_private *id; 165 enum rdma_cm_state old_state; 166 enum rdma_cm_state new_state; 167 struct rdma_cm_event event; 168 }; 169 170 struct cma_ndev_work { 171 struct work_struct work; 172 struct rdma_id_private *id; 173 struct rdma_cm_event event; 174 }; 175 176 struct iboe_mcast_work { 177 struct work_struct work; 178 struct rdma_id_private *id; 179 struct cma_multicast *mc; 180 }; 181 182 union cma_ip_addr { 183 struct in6_addr ip6; 184 struct { 185 __be32 pad[3]; 186 __be32 addr; 187 } ip4; 188 }; 189 190 struct cma_hdr { 191 u8 cma_version; 192 u8 ip_version; /* IP version: 7:4 */ 193 __be16 port; 194 union cma_ip_addr src_addr; 195 union cma_ip_addr dst_addr; 196 }; 197 198 #define CMA_VERSION 0x00 199 200 static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp) 201 { 202 unsigned long flags; 203 int ret; 204 205 spin_lock_irqsave(&id_priv->lock, flags); 206 ret = (id_priv->state == comp); 207 spin_unlock_irqrestore(&id_priv->lock, flags); 208 return ret; 209 } 210 211 static int cma_comp_exch(struct rdma_id_private *id_priv, 212 enum rdma_cm_state comp, enum rdma_cm_state exch) 213 { 214 unsigned long flags; 215 int ret; 216 217 spin_lock_irqsave(&id_priv->lock, flags); 218 if ((ret = (id_priv->state == comp))) 219 id_priv->state = exch; 220 spin_unlock_irqrestore(&id_priv->lock, flags); 221 return ret; 222 } 223 224 static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv, 225 enum rdma_cm_state exch) 226 { 227 unsigned long flags; 228 enum rdma_cm_state old; 229 230 spin_lock_irqsave(&id_priv->lock, flags); 231 old = id_priv->state; 232 id_priv->state = exch; 233 spin_unlock_irqrestore(&id_priv->lock, flags); 234 return old; 235 } 236 237 static inline u8 cma_get_ip_ver(struct cma_hdr *hdr) 238 { 239 return hdr->ip_version >> 4; 240 } 241 242 static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver) 243 { 244 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF); 245 } 246 247 static void cma_attach_to_dev(struct rdma_id_private *id_priv, 248 struct cma_device *cma_dev) 249 { 250 atomic_inc(&cma_dev->refcount); 251 id_priv->cma_dev = cma_dev; 252 id_priv->id.device = cma_dev->device; 253 id_priv->id.route.addr.dev_addr.transport = 254 rdma_node_get_transport(cma_dev->device->node_type); 255 list_add_tail(&id_priv->list, &cma_dev->id_list); 256 } 257 258 static inline void cma_deref_dev(struct cma_device *cma_dev) 259 { 260 if (atomic_dec_and_test(&cma_dev->refcount)) 261 complete(&cma_dev->comp); 262 } 263 264 static inline void release_mc(struct kref *kref) 265 { 266 struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref); 267 268 kfree(mc->multicast.ib); 269 kfree(mc); 270 } 271 272 static void cma_release_dev(struct rdma_id_private *id_priv) 273 { 274 mutex_lock(&lock); 275 list_del(&id_priv->list); 276 cma_deref_dev(id_priv->cma_dev); 277 id_priv->cma_dev = NULL; 278 mutex_unlock(&lock); 279 } 280 281 static inline struct sockaddr *cma_src_addr(struct rdma_id_private *id_priv) 282 { 283 return (struct sockaddr *) &id_priv->id.route.addr.src_addr; 284 } 285 286 static inline struct sockaddr *cma_dst_addr(struct rdma_id_private *id_priv) 287 { 288 return (struct sockaddr *) &id_priv->id.route.addr.dst_addr; 289 } 290 291 static inline unsigned short cma_family(struct rdma_id_private *id_priv) 292 { 293 return id_priv->id.route.addr.src_addr.ss_family; 294 } 295 296 static int cma_set_qkey(struct rdma_id_private *id_priv, u32 qkey) 297 { 298 struct ib_sa_mcmember_rec rec; 299 int ret = 0; 300 301 if (id_priv->qkey) { 302 if (qkey && id_priv->qkey != qkey) 303 return -EINVAL; 304 return 0; 305 } 306 307 if (qkey) { 308 id_priv->qkey = qkey; 309 return 0; 310 } 311 312 switch (id_priv->id.ps) { 313 case RDMA_PS_UDP: 314 case RDMA_PS_IB: 315 id_priv->qkey = RDMA_UDP_QKEY; 316 break; 317 case RDMA_PS_IPOIB: 318 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid); 319 ret = ib_sa_get_mcmember_rec(id_priv->id.device, 320 id_priv->id.port_num, &rec.mgid, 321 &rec); 322 if (!ret) 323 id_priv->qkey = be32_to_cpu(rec.qkey); 324 break; 325 default: 326 break; 327 } 328 return ret; 329 } 330 331 static int find_gid_port(struct ib_device *device, union ib_gid *gid, u8 port_num) 332 { 333 int i; 334 int err; 335 struct ib_port_attr props; 336 union ib_gid tmp; 337 338 err = ib_query_port(device, port_num, &props); 339 if (err) 340 return err; 341 342 for (i = 0; i < props.gid_tbl_len; ++i) { 343 err = ib_query_gid(device, port_num, i, &tmp); 344 if (err) 345 return err; 346 if (!memcmp(&tmp, gid, sizeof tmp)) 347 return 0; 348 } 349 350 return -EADDRNOTAVAIL; 351 } 352 353 static void cma_translate_ib(struct sockaddr_ib *sib, struct rdma_dev_addr *dev_addr) 354 { 355 dev_addr->dev_type = ARPHRD_INFINIBAND; 356 rdma_addr_set_sgid(dev_addr, (union ib_gid *) &sib->sib_addr); 357 ib_addr_set_pkey(dev_addr, ntohs(sib->sib_pkey)); 358 } 359 360 static int cma_translate_addr(struct sockaddr *addr, struct rdma_dev_addr *dev_addr) 361 { 362 int ret; 363 364 if (addr->sa_family != AF_IB) { 365 ret = rdma_translate_ip(addr, dev_addr); 366 } else { 367 cma_translate_ib((struct sockaddr_ib *) addr, dev_addr); 368 ret = 0; 369 } 370 371 return ret; 372 } 373 374 static int cma_acquire_dev(struct rdma_id_private *id_priv) 375 { 376 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 377 struct cma_device *cma_dev; 378 union ib_gid gid, iboe_gid; 379 int ret = -ENODEV; 380 u8 port; 381 enum rdma_link_layer dev_ll = dev_addr->dev_type == ARPHRD_INFINIBAND ? 382 IB_LINK_LAYER_INFINIBAND : IB_LINK_LAYER_ETHERNET; 383 384 if (dev_ll != IB_LINK_LAYER_INFINIBAND && 385 id_priv->id.ps == RDMA_PS_IPOIB) 386 return -EINVAL; 387 388 mutex_lock(&lock); 389 iboe_addr_get_sgid(dev_addr, &iboe_gid); 390 memcpy(&gid, dev_addr->src_dev_addr + 391 rdma_addr_gid_offset(dev_addr), sizeof gid); 392 list_for_each_entry(cma_dev, &dev_list, list) { 393 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) { 394 if (rdma_port_get_link_layer(cma_dev->device, port) == dev_ll) { 395 if (rdma_node_get_transport(cma_dev->device->node_type) == RDMA_TRANSPORT_IB && 396 rdma_port_get_link_layer(cma_dev->device, port) == IB_LINK_LAYER_ETHERNET) 397 ret = find_gid_port(cma_dev->device, &iboe_gid, port); 398 else 399 ret = find_gid_port(cma_dev->device, &gid, port); 400 401 if (!ret) { 402 id_priv->id.port_num = port; 403 goto out; 404 } 405 } 406 } 407 } 408 409 out: 410 if (!ret) 411 cma_attach_to_dev(id_priv, cma_dev); 412 413 mutex_unlock(&lock); 414 return ret; 415 } 416 417 /* 418 * Select the source IB device and address to reach the destination IB address. 419 */ 420 static int cma_resolve_ib_dev(struct rdma_id_private *id_priv) 421 { 422 struct cma_device *cma_dev, *cur_dev; 423 struct sockaddr_ib *addr; 424 union ib_gid gid, sgid, *dgid; 425 u16 pkey, index; 426 u8 p; 427 int i; 428 429 cma_dev = NULL; 430 addr = (struct sockaddr_ib *) cma_dst_addr(id_priv); 431 dgid = (union ib_gid *) &addr->sib_addr; 432 pkey = ntohs(addr->sib_pkey); 433 434 list_for_each_entry(cur_dev, &dev_list, list) { 435 if (rdma_node_get_transport(cur_dev->device->node_type) != RDMA_TRANSPORT_IB) 436 continue; 437 438 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) { 439 if (ib_find_cached_pkey(cur_dev->device, p, pkey, &index)) 440 continue; 441 442 for (i = 0; !ib_get_cached_gid(cur_dev->device, p, i, &gid); i++) { 443 if (!memcmp(&gid, dgid, sizeof(gid))) { 444 cma_dev = cur_dev; 445 sgid = gid; 446 id_priv->id.port_num = p; 447 goto found; 448 } 449 450 if (!cma_dev && (gid.global.subnet_prefix == 451 dgid->global.subnet_prefix)) { 452 cma_dev = cur_dev; 453 sgid = gid; 454 id_priv->id.port_num = p; 455 } 456 } 457 } 458 } 459 460 if (!cma_dev) 461 return -ENODEV; 462 463 found: 464 cma_attach_to_dev(id_priv, cma_dev); 465 addr = (struct sockaddr_ib *) cma_src_addr(id_priv); 466 memcpy(&addr->sib_addr, &sgid, sizeof sgid); 467 cma_translate_ib(addr, &id_priv->id.route.addr.dev_addr); 468 return 0; 469 } 470 471 static void cma_deref_id(struct rdma_id_private *id_priv) 472 { 473 if (atomic_dec_and_test(&id_priv->refcount)) 474 complete(&id_priv->comp); 475 } 476 477 static int cma_disable_callback(struct rdma_id_private *id_priv, 478 enum rdma_cm_state state) 479 { 480 mutex_lock(&id_priv->handler_mutex); 481 if (id_priv->state != state) { 482 mutex_unlock(&id_priv->handler_mutex); 483 return -EINVAL; 484 } 485 return 0; 486 } 487 488 struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler, 489 void *context, enum rdma_port_space ps, 490 enum ib_qp_type qp_type) 491 { 492 struct rdma_id_private *id_priv; 493 494 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL); 495 if (!id_priv) 496 return ERR_PTR(-ENOMEM); 497 498 id_priv->owner = task_pid_nr(current); 499 id_priv->state = RDMA_CM_IDLE; 500 id_priv->id.context = context; 501 id_priv->id.event_handler = event_handler; 502 id_priv->id.ps = ps; 503 id_priv->id.qp_type = qp_type; 504 spin_lock_init(&id_priv->lock); 505 mutex_init(&id_priv->qp_mutex); 506 init_completion(&id_priv->comp); 507 atomic_set(&id_priv->refcount, 1); 508 mutex_init(&id_priv->handler_mutex); 509 INIT_LIST_HEAD(&id_priv->listen_list); 510 INIT_LIST_HEAD(&id_priv->mc_list); 511 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num); 512 513 return &id_priv->id; 514 } 515 EXPORT_SYMBOL(rdma_create_id); 516 517 static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp) 518 { 519 struct ib_qp_attr qp_attr; 520 int qp_attr_mask, ret; 521 522 qp_attr.qp_state = IB_QPS_INIT; 523 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 524 if (ret) 525 return ret; 526 527 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); 528 if (ret) 529 return ret; 530 531 qp_attr.qp_state = IB_QPS_RTR; 532 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE); 533 if (ret) 534 return ret; 535 536 qp_attr.qp_state = IB_QPS_RTS; 537 qp_attr.sq_psn = 0; 538 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN); 539 540 return ret; 541 } 542 543 static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp) 544 { 545 struct ib_qp_attr qp_attr; 546 int qp_attr_mask, ret; 547 548 qp_attr.qp_state = IB_QPS_INIT; 549 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 550 if (ret) 551 return ret; 552 553 return ib_modify_qp(qp, &qp_attr, qp_attr_mask); 554 } 555 556 int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd, 557 struct ib_qp_init_attr *qp_init_attr) 558 { 559 struct rdma_id_private *id_priv; 560 struct ib_qp *qp; 561 int ret; 562 563 id_priv = container_of(id, struct rdma_id_private, id); 564 if (id->device != pd->device) 565 return -EINVAL; 566 567 qp = ib_create_qp(pd, qp_init_attr); 568 if (IS_ERR(qp)) 569 return PTR_ERR(qp); 570 571 if (id->qp_type == IB_QPT_UD) 572 ret = cma_init_ud_qp(id_priv, qp); 573 else 574 ret = cma_init_conn_qp(id_priv, qp); 575 if (ret) 576 goto err; 577 578 id->qp = qp; 579 id_priv->qp_num = qp->qp_num; 580 id_priv->srq = (qp->srq != NULL); 581 return 0; 582 err: 583 ib_destroy_qp(qp); 584 return ret; 585 } 586 EXPORT_SYMBOL(rdma_create_qp); 587 588 void rdma_destroy_qp(struct rdma_cm_id *id) 589 { 590 struct rdma_id_private *id_priv; 591 592 id_priv = container_of(id, struct rdma_id_private, id); 593 mutex_lock(&id_priv->qp_mutex); 594 ib_destroy_qp(id_priv->id.qp); 595 id_priv->id.qp = NULL; 596 mutex_unlock(&id_priv->qp_mutex); 597 } 598 EXPORT_SYMBOL(rdma_destroy_qp); 599 600 static int cma_modify_qp_rtr(struct rdma_id_private *id_priv, 601 struct rdma_conn_param *conn_param) 602 { 603 struct ib_qp_attr qp_attr; 604 int qp_attr_mask, ret; 605 606 mutex_lock(&id_priv->qp_mutex); 607 if (!id_priv->id.qp) { 608 ret = 0; 609 goto out; 610 } 611 612 /* Need to update QP attributes from default values. */ 613 qp_attr.qp_state = IB_QPS_INIT; 614 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 615 if (ret) 616 goto out; 617 618 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); 619 if (ret) 620 goto out; 621 622 qp_attr.qp_state = IB_QPS_RTR; 623 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 624 if (ret) 625 goto out; 626 627 if (conn_param) 628 qp_attr.max_dest_rd_atomic = conn_param->responder_resources; 629 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); 630 out: 631 mutex_unlock(&id_priv->qp_mutex); 632 return ret; 633 } 634 635 static int cma_modify_qp_rts(struct rdma_id_private *id_priv, 636 struct rdma_conn_param *conn_param) 637 { 638 struct ib_qp_attr qp_attr; 639 int qp_attr_mask, ret; 640 641 mutex_lock(&id_priv->qp_mutex); 642 if (!id_priv->id.qp) { 643 ret = 0; 644 goto out; 645 } 646 647 qp_attr.qp_state = IB_QPS_RTS; 648 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 649 if (ret) 650 goto out; 651 652 if (conn_param) 653 qp_attr.max_rd_atomic = conn_param->initiator_depth; 654 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); 655 out: 656 mutex_unlock(&id_priv->qp_mutex); 657 return ret; 658 } 659 660 static int cma_modify_qp_err(struct rdma_id_private *id_priv) 661 { 662 struct ib_qp_attr qp_attr; 663 int ret; 664 665 mutex_lock(&id_priv->qp_mutex); 666 if (!id_priv->id.qp) { 667 ret = 0; 668 goto out; 669 } 670 671 qp_attr.qp_state = IB_QPS_ERR; 672 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE); 673 out: 674 mutex_unlock(&id_priv->qp_mutex); 675 return ret; 676 } 677 678 static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv, 679 struct ib_qp_attr *qp_attr, int *qp_attr_mask) 680 { 681 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 682 int ret; 683 u16 pkey; 684 685 if (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num) == 686 IB_LINK_LAYER_INFINIBAND) 687 pkey = ib_addr_get_pkey(dev_addr); 688 else 689 pkey = 0xffff; 690 691 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num, 692 pkey, &qp_attr->pkey_index); 693 if (ret) 694 return ret; 695 696 qp_attr->port_num = id_priv->id.port_num; 697 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT; 698 699 if (id_priv->id.qp_type == IB_QPT_UD) { 700 ret = cma_set_qkey(id_priv, 0); 701 if (ret) 702 return ret; 703 704 qp_attr->qkey = id_priv->qkey; 705 *qp_attr_mask |= IB_QP_QKEY; 706 } else { 707 qp_attr->qp_access_flags = 0; 708 *qp_attr_mask |= IB_QP_ACCESS_FLAGS; 709 } 710 return 0; 711 } 712 713 int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr, 714 int *qp_attr_mask) 715 { 716 struct rdma_id_private *id_priv; 717 int ret = 0; 718 719 id_priv = container_of(id, struct rdma_id_private, id); 720 switch (rdma_node_get_transport(id_priv->id.device->node_type)) { 721 case RDMA_TRANSPORT_IB: 722 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD)) 723 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask); 724 else 725 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr, 726 qp_attr_mask); 727 if (qp_attr->qp_state == IB_QPS_RTR) 728 qp_attr->rq_psn = id_priv->seq_num; 729 break; 730 case RDMA_TRANSPORT_IWARP: 731 if (!id_priv->cm_id.iw) { 732 qp_attr->qp_access_flags = 0; 733 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS; 734 } else 735 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr, 736 qp_attr_mask); 737 break; 738 default: 739 ret = -ENOSYS; 740 break; 741 } 742 743 return ret; 744 } 745 EXPORT_SYMBOL(rdma_init_qp_attr); 746 747 static inline int cma_zero_addr(struct sockaddr *addr) 748 { 749 switch (addr->sa_family) { 750 case AF_INET: 751 return ipv4_is_zeronet(((struct sockaddr_in *)addr)->sin_addr.s_addr); 752 case AF_INET6: 753 return ipv6_addr_any(&((struct sockaddr_in6 *) addr)->sin6_addr); 754 case AF_IB: 755 return ib_addr_any(&((struct sockaddr_ib *) addr)->sib_addr); 756 default: 757 return 0; 758 } 759 } 760 761 static inline int cma_loopback_addr(struct sockaddr *addr) 762 { 763 switch (addr->sa_family) { 764 case AF_INET: 765 return ipv4_is_loopback(((struct sockaddr_in *) addr)->sin_addr.s_addr); 766 case AF_INET6: 767 return ipv6_addr_loopback(&((struct sockaddr_in6 *) addr)->sin6_addr); 768 case AF_IB: 769 return ib_addr_loopback(&((struct sockaddr_ib *) addr)->sib_addr); 770 default: 771 return 0; 772 } 773 } 774 775 static inline int cma_any_addr(struct sockaddr *addr) 776 { 777 return cma_zero_addr(addr) || cma_loopback_addr(addr); 778 } 779 780 static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst) 781 { 782 if (src->sa_family != dst->sa_family) 783 return -1; 784 785 switch (src->sa_family) { 786 case AF_INET: 787 return ((struct sockaddr_in *) src)->sin_addr.s_addr != 788 ((struct sockaddr_in *) dst)->sin_addr.s_addr; 789 case AF_INET6: 790 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr, 791 &((struct sockaddr_in6 *) dst)->sin6_addr); 792 default: 793 return ib_addr_cmp(&((struct sockaddr_ib *) src)->sib_addr, 794 &((struct sockaddr_ib *) dst)->sib_addr); 795 } 796 } 797 798 static __be16 cma_port(struct sockaddr *addr) 799 { 800 struct sockaddr_ib *sib; 801 802 switch (addr->sa_family) { 803 case AF_INET: 804 return ((struct sockaddr_in *) addr)->sin_port; 805 case AF_INET6: 806 return ((struct sockaddr_in6 *) addr)->sin6_port; 807 case AF_IB: 808 sib = (struct sockaddr_ib *) addr; 809 return htons((u16) (be64_to_cpu(sib->sib_sid) & 810 be64_to_cpu(sib->sib_sid_mask))); 811 default: 812 return 0; 813 } 814 } 815 816 static inline int cma_any_port(struct sockaddr *addr) 817 { 818 return !cma_port(addr); 819 } 820 821 static void cma_save_ib_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id, 822 struct ib_sa_path_rec *path) 823 { 824 struct sockaddr_ib *listen_ib, *ib; 825 826 listen_ib = (struct sockaddr_ib *) &listen_id->route.addr.src_addr; 827 ib = (struct sockaddr_ib *) &id->route.addr.src_addr; 828 ib->sib_family = listen_ib->sib_family; 829 ib->sib_pkey = path->pkey; 830 ib->sib_flowinfo = path->flow_label; 831 memcpy(&ib->sib_addr, &path->sgid, 16); 832 ib->sib_sid = listen_ib->sib_sid; 833 ib->sib_sid_mask = cpu_to_be64(0xffffffffffffffffULL); 834 ib->sib_scope_id = listen_ib->sib_scope_id; 835 836 ib = (struct sockaddr_ib *) &id->route.addr.dst_addr; 837 ib->sib_family = listen_ib->sib_family; 838 ib->sib_pkey = path->pkey; 839 ib->sib_flowinfo = path->flow_label; 840 memcpy(&ib->sib_addr, &path->dgid, 16); 841 } 842 843 static void cma_save_ip4_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id, 844 struct cma_hdr *hdr) 845 { 846 struct sockaddr_in *listen4, *ip4; 847 848 listen4 = (struct sockaddr_in *) &listen_id->route.addr.src_addr; 849 ip4 = (struct sockaddr_in *) &id->route.addr.src_addr; 850 ip4->sin_family = listen4->sin_family; 851 ip4->sin_addr.s_addr = hdr->dst_addr.ip4.addr; 852 ip4->sin_port = listen4->sin_port; 853 854 ip4 = (struct sockaddr_in *) &id->route.addr.dst_addr; 855 ip4->sin_family = listen4->sin_family; 856 ip4->sin_addr.s_addr = hdr->src_addr.ip4.addr; 857 ip4->sin_port = hdr->port; 858 } 859 860 static void cma_save_ip6_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id, 861 struct cma_hdr *hdr) 862 { 863 struct sockaddr_in6 *listen6, *ip6; 864 865 listen6 = (struct sockaddr_in6 *) &listen_id->route.addr.src_addr; 866 ip6 = (struct sockaddr_in6 *) &id->route.addr.src_addr; 867 ip6->sin6_family = listen6->sin6_family; 868 ip6->sin6_addr = hdr->dst_addr.ip6; 869 ip6->sin6_port = listen6->sin6_port; 870 871 ip6 = (struct sockaddr_in6 *) &id->route.addr.dst_addr; 872 ip6->sin6_family = listen6->sin6_family; 873 ip6->sin6_addr = hdr->src_addr.ip6; 874 ip6->sin6_port = hdr->port; 875 } 876 877 static int cma_save_net_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id, 878 struct ib_cm_event *ib_event) 879 { 880 struct cma_hdr *hdr; 881 882 if ((listen_id->route.addr.src_addr.ss_family == AF_IB) && 883 (ib_event->event == IB_CM_REQ_RECEIVED)) { 884 cma_save_ib_info(id, listen_id, ib_event->param.req_rcvd.primary_path); 885 return 0; 886 } 887 888 hdr = ib_event->private_data; 889 if (hdr->cma_version != CMA_VERSION) 890 return -EINVAL; 891 892 switch (cma_get_ip_ver(hdr)) { 893 case 4: 894 cma_save_ip4_info(id, listen_id, hdr); 895 break; 896 case 6: 897 cma_save_ip6_info(id, listen_id, hdr); 898 break; 899 default: 900 return -EINVAL; 901 } 902 return 0; 903 } 904 905 static inline int cma_user_data_offset(struct rdma_id_private *id_priv) 906 { 907 return cma_family(id_priv) == AF_IB ? 0 : sizeof(struct cma_hdr); 908 } 909 910 static void cma_cancel_route(struct rdma_id_private *id_priv) 911 { 912 switch (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num)) { 913 case IB_LINK_LAYER_INFINIBAND: 914 if (id_priv->query) 915 ib_sa_cancel_query(id_priv->query_id, id_priv->query); 916 break; 917 default: 918 break; 919 } 920 } 921 922 static void cma_cancel_listens(struct rdma_id_private *id_priv) 923 { 924 struct rdma_id_private *dev_id_priv; 925 926 /* 927 * Remove from listen_any_list to prevent added devices from spawning 928 * additional listen requests. 929 */ 930 mutex_lock(&lock); 931 list_del(&id_priv->list); 932 933 while (!list_empty(&id_priv->listen_list)) { 934 dev_id_priv = list_entry(id_priv->listen_list.next, 935 struct rdma_id_private, listen_list); 936 /* sync with device removal to avoid duplicate destruction */ 937 list_del_init(&dev_id_priv->list); 938 list_del(&dev_id_priv->listen_list); 939 mutex_unlock(&lock); 940 941 rdma_destroy_id(&dev_id_priv->id); 942 mutex_lock(&lock); 943 } 944 mutex_unlock(&lock); 945 } 946 947 static void cma_cancel_operation(struct rdma_id_private *id_priv, 948 enum rdma_cm_state state) 949 { 950 switch (state) { 951 case RDMA_CM_ADDR_QUERY: 952 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr); 953 break; 954 case RDMA_CM_ROUTE_QUERY: 955 cma_cancel_route(id_priv); 956 break; 957 case RDMA_CM_LISTEN: 958 if (cma_any_addr(cma_src_addr(id_priv)) && !id_priv->cma_dev) 959 cma_cancel_listens(id_priv); 960 break; 961 default: 962 break; 963 } 964 } 965 966 static void cma_release_port(struct rdma_id_private *id_priv) 967 { 968 struct rdma_bind_list *bind_list = id_priv->bind_list; 969 970 if (!bind_list) 971 return; 972 973 mutex_lock(&lock); 974 hlist_del(&id_priv->node); 975 if (hlist_empty(&bind_list->owners)) { 976 idr_remove(bind_list->ps, bind_list->port); 977 kfree(bind_list); 978 } 979 mutex_unlock(&lock); 980 } 981 982 static void cma_leave_mc_groups(struct rdma_id_private *id_priv) 983 { 984 struct cma_multicast *mc; 985 986 while (!list_empty(&id_priv->mc_list)) { 987 mc = container_of(id_priv->mc_list.next, 988 struct cma_multicast, list); 989 list_del(&mc->list); 990 switch (rdma_port_get_link_layer(id_priv->cma_dev->device, id_priv->id.port_num)) { 991 case IB_LINK_LAYER_INFINIBAND: 992 ib_sa_free_multicast(mc->multicast.ib); 993 kfree(mc); 994 break; 995 case IB_LINK_LAYER_ETHERNET: 996 kref_put(&mc->mcref, release_mc); 997 break; 998 default: 999 break; 1000 } 1001 } 1002 } 1003 1004 void rdma_destroy_id(struct rdma_cm_id *id) 1005 { 1006 struct rdma_id_private *id_priv; 1007 enum rdma_cm_state state; 1008 1009 id_priv = container_of(id, struct rdma_id_private, id); 1010 state = cma_exch(id_priv, RDMA_CM_DESTROYING); 1011 cma_cancel_operation(id_priv, state); 1012 1013 /* 1014 * Wait for any active callback to finish. New callbacks will find 1015 * the id_priv state set to destroying and abort. 1016 */ 1017 mutex_lock(&id_priv->handler_mutex); 1018 mutex_unlock(&id_priv->handler_mutex); 1019 1020 if (id_priv->cma_dev) { 1021 switch (rdma_node_get_transport(id_priv->id.device->node_type)) { 1022 case RDMA_TRANSPORT_IB: 1023 if (id_priv->cm_id.ib) 1024 ib_destroy_cm_id(id_priv->cm_id.ib); 1025 break; 1026 case RDMA_TRANSPORT_IWARP: 1027 if (id_priv->cm_id.iw) 1028 iw_destroy_cm_id(id_priv->cm_id.iw); 1029 break; 1030 default: 1031 break; 1032 } 1033 cma_leave_mc_groups(id_priv); 1034 cma_release_dev(id_priv); 1035 } 1036 1037 cma_release_port(id_priv); 1038 cma_deref_id(id_priv); 1039 wait_for_completion(&id_priv->comp); 1040 1041 if (id_priv->internal_id) 1042 cma_deref_id(id_priv->id.context); 1043 1044 kfree(id_priv->id.route.path_rec); 1045 kfree(id_priv); 1046 } 1047 EXPORT_SYMBOL(rdma_destroy_id); 1048 1049 static int cma_rep_recv(struct rdma_id_private *id_priv) 1050 { 1051 int ret; 1052 1053 ret = cma_modify_qp_rtr(id_priv, NULL); 1054 if (ret) 1055 goto reject; 1056 1057 ret = cma_modify_qp_rts(id_priv, NULL); 1058 if (ret) 1059 goto reject; 1060 1061 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0); 1062 if (ret) 1063 goto reject; 1064 1065 return 0; 1066 reject: 1067 cma_modify_qp_err(id_priv); 1068 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED, 1069 NULL, 0, NULL, 0); 1070 return ret; 1071 } 1072 1073 static void cma_set_rep_event_data(struct rdma_cm_event *event, 1074 struct ib_cm_rep_event_param *rep_data, 1075 void *private_data) 1076 { 1077 event->param.conn.private_data = private_data; 1078 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE; 1079 event->param.conn.responder_resources = rep_data->responder_resources; 1080 event->param.conn.initiator_depth = rep_data->initiator_depth; 1081 event->param.conn.flow_control = rep_data->flow_control; 1082 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count; 1083 event->param.conn.srq = rep_data->srq; 1084 event->param.conn.qp_num = rep_data->remote_qpn; 1085 } 1086 1087 static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) 1088 { 1089 struct rdma_id_private *id_priv = cm_id->context; 1090 struct rdma_cm_event event; 1091 int ret = 0; 1092 1093 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT && 1094 cma_disable_callback(id_priv, RDMA_CM_CONNECT)) || 1095 (ib_event->event == IB_CM_TIMEWAIT_EXIT && 1096 cma_disable_callback(id_priv, RDMA_CM_DISCONNECT))) 1097 return 0; 1098 1099 memset(&event, 0, sizeof event); 1100 switch (ib_event->event) { 1101 case IB_CM_REQ_ERROR: 1102 case IB_CM_REP_ERROR: 1103 event.event = RDMA_CM_EVENT_UNREACHABLE; 1104 event.status = -ETIMEDOUT; 1105 break; 1106 case IB_CM_REP_RECEIVED: 1107 if (id_priv->id.qp) { 1108 event.status = cma_rep_recv(id_priv); 1109 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR : 1110 RDMA_CM_EVENT_ESTABLISHED; 1111 } else { 1112 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE; 1113 } 1114 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd, 1115 ib_event->private_data); 1116 break; 1117 case IB_CM_RTU_RECEIVED: 1118 case IB_CM_USER_ESTABLISHED: 1119 event.event = RDMA_CM_EVENT_ESTABLISHED; 1120 break; 1121 case IB_CM_DREQ_ERROR: 1122 event.status = -ETIMEDOUT; /* fall through */ 1123 case IB_CM_DREQ_RECEIVED: 1124 case IB_CM_DREP_RECEIVED: 1125 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT, 1126 RDMA_CM_DISCONNECT)) 1127 goto out; 1128 event.event = RDMA_CM_EVENT_DISCONNECTED; 1129 break; 1130 case IB_CM_TIMEWAIT_EXIT: 1131 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT; 1132 break; 1133 case IB_CM_MRA_RECEIVED: 1134 /* ignore event */ 1135 goto out; 1136 case IB_CM_REJ_RECEIVED: 1137 cma_modify_qp_err(id_priv); 1138 event.status = ib_event->param.rej_rcvd.reason; 1139 event.event = RDMA_CM_EVENT_REJECTED; 1140 event.param.conn.private_data = ib_event->private_data; 1141 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE; 1142 break; 1143 default: 1144 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n", 1145 ib_event->event); 1146 goto out; 1147 } 1148 1149 ret = id_priv->id.event_handler(&id_priv->id, &event); 1150 if (ret) { 1151 /* Destroy the CM ID by returning a non-zero value. */ 1152 id_priv->cm_id.ib = NULL; 1153 cma_exch(id_priv, RDMA_CM_DESTROYING); 1154 mutex_unlock(&id_priv->handler_mutex); 1155 rdma_destroy_id(&id_priv->id); 1156 return ret; 1157 } 1158 out: 1159 mutex_unlock(&id_priv->handler_mutex); 1160 return ret; 1161 } 1162 1163 static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id, 1164 struct ib_cm_event *ib_event) 1165 { 1166 struct rdma_id_private *id_priv; 1167 struct rdma_cm_id *id; 1168 struct rdma_route *rt; 1169 int ret; 1170 1171 id = rdma_create_id(listen_id->event_handler, listen_id->context, 1172 listen_id->ps, ib_event->param.req_rcvd.qp_type); 1173 if (IS_ERR(id)) 1174 return NULL; 1175 1176 id_priv = container_of(id, struct rdma_id_private, id); 1177 if (cma_save_net_info(id, listen_id, ib_event)) 1178 goto err; 1179 1180 rt = &id->route; 1181 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1; 1182 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths, 1183 GFP_KERNEL); 1184 if (!rt->path_rec) 1185 goto err; 1186 1187 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path; 1188 if (rt->num_paths == 2) 1189 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path; 1190 1191 if (cma_any_addr(cma_src_addr(id_priv))) { 1192 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND; 1193 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid); 1194 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey)); 1195 } else { 1196 ret = cma_translate_addr(cma_src_addr(id_priv), &rt->addr.dev_addr); 1197 if (ret) 1198 goto err; 1199 } 1200 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid); 1201 1202 id_priv->state = RDMA_CM_CONNECT; 1203 return id_priv; 1204 1205 err: 1206 rdma_destroy_id(id); 1207 return NULL; 1208 } 1209 1210 static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id, 1211 struct ib_cm_event *ib_event) 1212 { 1213 struct rdma_id_private *id_priv; 1214 struct rdma_cm_id *id; 1215 int ret; 1216 1217 id = rdma_create_id(listen_id->event_handler, listen_id->context, 1218 listen_id->ps, IB_QPT_UD); 1219 if (IS_ERR(id)) 1220 return NULL; 1221 1222 id_priv = container_of(id, struct rdma_id_private, id); 1223 if (cma_save_net_info(id, listen_id, ib_event)) 1224 goto err; 1225 1226 if (!cma_any_addr((struct sockaddr *) &id->route.addr.src_addr)) { 1227 ret = cma_translate_addr(cma_src_addr(id_priv), &id->route.addr.dev_addr); 1228 if (ret) 1229 goto err; 1230 } 1231 1232 id_priv->state = RDMA_CM_CONNECT; 1233 return id_priv; 1234 err: 1235 rdma_destroy_id(id); 1236 return NULL; 1237 } 1238 1239 static void cma_set_req_event_data(struct rdma_cm_event *event, 1240 struct ib_cm_req_event_param *req_data, 1241 void *private_data, int offset) 1242 { 1243 event->param.conn.private_data = private_data + offset; 1244 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset; 1245 event->param.conn.responder_resources = req_data->responder_resources; 1246 event->param.conn.initiator_depth = req_data->initiator_depth; 1247 event->param.conn.flow_control = req_data->flow_control; 1248 event->param.conn.retry_count = req_data->retry_count; 1249 event->param.conn.rnr_retry_count = req_data->rnr_retry_count; 1250 event->param.conn.srq = req_data->srq; 1251 event->param.conn.qp_num = req_data->remote_qpn; 1252 } 1253 1254 static int cma_check_req_qp_type(struct rdma_cm_id *id, struct ib_cm_event *ib_event) 1255 { 1256 return (((ib_event->event == IB_CM_REQ_RECEIVED) && 1257 (ib_event->param.req_rcvd.qp_type == id->qp_type)) || 1258 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) && 1259 (id->qp_type == IB_QPT_UD)) || 1260 (!id->qp_type)); 1261 } 1262 1263 static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) 1264 { 1265 struct rdma_id_private *listen_id, *conn_id; 1266 struct rdma_cm_event event; 1267 int offset, ret; 1268 1269 listen_id = cm_id->context; 1270 if (!cma_check_req_qp_type(&listen_id->id, ib_event)) 1271 return -EINVAL; 1272 1273 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN)) 1274 return -ECONNABORTED; 1275 1276 memset(&event, 0, sizeof event); 1277 offset = cma_user_data_offset(listen_id); 1278 event.event = RDMA_CM_EVENT_CONNECT_REQUEST; 1279 if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) { 1280 conn_id = cma_new_udp_id(&listen_id->id, ib_event); 1281 event.param.ud.private_data = ib_event->private_data + offset; 1282 event.param.ud.private_data_len = 1283 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset; 1284 } else { 1285 conn_id = cma_new_conn_id(&listen_id->id, ib_event); 1286 cma_set_req_event_data(&event, &ib_event->param.req_rcvd, 1287 ib_event->private_data, offset); 1288 } 1289 if (!conn_id) { 1290 ret = -ENOMEM; 1291 goto err1; 1292 } 1293 1294 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING); 1295 ret = cma_acquire_dev(conn_id); 1296 if (ret) 1297 goto err2; 1298 1299 conn_id->cm_id.ib = cm_id; 1300 cm_id->context = conn_id; 1301 cm_id->cm_handler = cma_ib_handler; 1302 1303 /* 1304 * Protect against the user destroying conn_id from another thread 1305 * until we're done accessing it. 1306 */ 1307 atomic_inc(&conn_id->refcount); 1308 ret = conn_id->id.event_handler(&conn_id->id, &event); 1309 if (ret) 1310 goto err3; 1311 1312 /* 1313 * Acquire mutex to prevent user executing rdma_destroy_id() 1314 * while we're accessing the cm_id. 1315 */ 1316 mutex_lock(&lock); 1317 if (cma_comp(conn_id, RDMA_CM_CONNECT) && (conn_id->id.qp_type != IB_QPT_UD)) 1318 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0); 1319 mutex_unlock(&lock); 1320 mutex_unlock(&conn_id->handler_mutex); 1321 mutex_unlock(&listen_id->handler_mutex); 1322 cma_deref_id(conn_id); 1323 return 0; 1324 1325 err3: 1326 cma_deref_id(conn_id); 1327 /* Destroy the CM ID by returning a non-zero value. */ 1328 conn_id->cm_id.ib = NULL; 1329 err2: 1330 cma_exch(conn_id, RDMA_CM_DESTROYING); 1331 mutex_unlock(&conn_id->handler_mutex); 1332 err1: 1333 mutex_unlock(&listen_id->handler_mutex); 1334 if (conn_id) 1335 rdma_destroy_id(&conn_id->id); 1336 return ret; 1337 } 1338 1339 __be64 rdma_get_service_id(struct rdma_cm_id *id, struct sockaddr *addr) 1340 { 1341 if (addr->sa_family == AF_IB) 1342 return ((struct sockaddr_ib *) addr)->sib_sid; 1343 1344 return cpu_to_be64(((u64)id->ps << 16) + be16_to_cpu(cma_port(addr))); 1345 } 1346 EXPORT_SYMBOL(rdma_get_service_id); 1347 1348 static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr, 1349 struct ib_cm_compare_data *compare) 1350 { 1351 struct cma_hdr *cma_data, *cma_mask; 1352 __be32 ip4_addr; 1353 struct in6_addr ip6_addr; 1354 1355 memset(compare, 0, sizeof *compare); 1356 cma_data = (void *) compare->data; 1357 cma_mask = (void *) compare->mask; 1358 1359 switch (addr->sa_family) { 1360 case AF_INET: 1361 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr; 1362 cma_set_ip_ver(cma_data, 4); 1363 cma_set_ip_ver(cma_mask, 0xF); 1364 if (!cma_any_addr(addr)) { 1365 cma_data->dst_addr.ip4.addr = ip4_addr; 1366 cma_mask->dst_addr.ip4.addr = htonl(~0); 1367 } 1368 break; 1369 case AF_INET6: 1370 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr; 1371 cma_set_ip_ver(cma_data, 6); 1372 cma_set_ip_ver(cma_mask, 0xF); 1373 if (!cma_any_addr(addr)) { 1374 cma_data->dst_addr.ip6 = ip6_addr; 1375 memset(&cma_mask->dst_addr.ip6, 0xFF, 1376 sizeof cma_mask->dst_addr.ip6); 1377 } 1378 break; 1379 default: 1380 break; 1381 } 1382 } 1383 1384 static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event) 1385 { 1386 struct rdma_id_private *id_priv = iw_id->context; 1387 struct rdma_cm_event event; 1388 int ret = 0; 1389 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr; 1390 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr; 1391 1392 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT)) 1393 return 0; 1394 1395 memset(&event, 0, sizeof event); 1396 switch (iw_event->event) { 1397 case IW_CM_EVENT_CLOSE: 1398 event.event = RDMA_CM_EVENT_DISCONNECTED; 1399 break; 1400 case IW_CM_EVENT_CONNECT_REPLY: 1401 memcpy(cma_src_addr(id_priv), laddr, 1402 rdma_addr_size(laddr)); 1403 memcpy(cma_dst_addr(id_priv), raddr, 1404 rdma_addr_size(raddr)); 1405 switch (iw_event->status) { 1406 case 0: 1407 event.event = RDMA_CM_EVENT_ESTABLISHED; 1408 event.param.conn.initiator_depth = iw_event->ird; 1409 event.param.conn.responder_resources = iw_event->ord; 1410 break; 1411 case -ECONNRESET: 1412 case -ECONNREFUSED: 1413 event.event = RDMA_CM_EVENT_REJECTED; 1414 break; 1415 case -ETIMEDOUT: 1416 event.event = RDMA_CM_EVENT_UNREACHABLE; 1417 break; 1418 default: 1419 event.event = RDMA_CM_EVENT_CONNECT_ERROR; 1420 break; 1421 } 1422 break; 1423 case IW_CM_EVENT_ESTABLISHED: 1424 event.event = RDMA_CM_EVENT_ESTABLISHED; 1425 event.param.conn.initiator_depth = iw_event->ird; 1426 event.param.conn.responder_resources = iw_event->ord; 1427 break; 1428 default: 1429 BUG_ON(1); 1430 } 1431 1432 event.status = iw_event->status; 1433 event.param.conn.private_data = iw_event->private_data; 1434 event.param.conn.private_data_len = iw_event->private_data_len; 1435 ret = id_priv->id.event_handler(&id_priv->id, &event); 1436 if (ret) { 1437 /* Destroy the CM ID by returning a non-zero value. */ 1438 id_priv->cm_id.iw = NULL; 1439 cma_exch(id_priv, RDMA_CM_DESTROYING); 1440 mutex_unlock(&id_priv->handler_mutex); 1441 rdma_destroy_id(&id_priv->id); 1442 return ret; 1443 } 1444 1445 mutex_unlock(&id_priv->handler_mutex); 1446 return ret; 1447 } 1448 1449 static int iw_conn_req_handler(struct iw_cm_id *cm_id, 1450 struct iw_cm_event *iw_event) 1451 { 1452 struct rdma_cm_id *new_cm_id; 1453 struct rdma_id_private *listen_id, *conn_id; 1454 struct net_device *dev = NULL; 1455 struct rdma_cm_event event; 1456 int ret; 1457 struct ib_device_attr attr; 1458 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr; 1459 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr; 1460 1461 listen_id = cm_id->context; 1462 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN)) 1463 return -ECONNABORTED; 1464 1465 /* Create a new RDMA id for the new IW CM ID */ 1466 new_cm_id = rdma_create_id(listen_id->id.event_handler, 1467 listen_id->id.context, 1468 RDMA_PS_TCP, IB_QPT_RC); 1469 if (IS_ERR(new_cm_id)) { 1470 ret = -ENOMEM; 1471 goto out; 1472 } 1473 conn_id = container_of(new_cm_id, struct rdma_id_private, id); 1474 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING); 1475 conn_id->state = RDMA_CM_CONNECT; 1476 1477 ret = rdma_translate_ip(laddr, &conn_id->id.route.addr.dev_addr); 1478 if (ret) { 1479 mutex_unlock(&conn_id->handler_mutex); 1480 rdma_destroy_id(new_cm_id); 1481 goto out; 1482 } 1483 1484 ret = cma_acquire_dev(conn_id); 1485 if (ret) { 1486 mutex_unlock(&conn_id->handler_mutex); 1487 rdma_destroy_id(new_cm_id); 1488 goto out; 1489 } 1490 1491 conn_id->cm_id.iw = cm_id; 1492 cm_id->context = conn_id; 1493 cm_id->cm_handler = cma_iw_handler; 1494 1495 memcpy(cma_src_addr(conn_id), laddr, rdma_addr_size(laddr)); 1496 memcpy(cma_dst_addr(conn_id), raddr, rdma_addr_size(raddr)); 1497 1498 ret = ib_query_device(conn_id->id.device, &attr); 1499 if (ret) { 1500 mutex_unlock(&conn_id->handler_mutex); 1501 rdma_destroy_id(new_cm_id); 1502 goto out; 1503 } 1504 1505 memset(&event, 0, sizeof event); 1506 event.event = RDMA_CM_EVENT_CONNECT_REQUEST; 1507 event.param.conn.private_data = iw_event->private_data; 1508 event.param.conn.private_data_len = iw_event->private_data_len; 1509 event.param.conn.initiator_depth = iw_event->ird; 1510 event.param.conn.responder_resources = iw_event->ord; 1511 1512 /* 1513 * Protect against the user destroying conn_id from another thread 1514 * until we're done accessing it. 1515 */ 1516 atomic_inc(&conn_id->refcount); 1517 ret = conn_id->id.event_handler(&conn_id->id, &event); 1518 if (ret) { 1519 /* User wants to destroy the CM ID */ 1520 conn_id->cm_id.iw = NULL; 1521 cma_exch(conn_id, RDMA_CM_DESTROYING); 1522 mutex_unlock(&conn_id->handler_mutex); 1523 cma_deref_id(conn_id); 1524 rdma_destroy_id(&conn_id->id); 1525 goto out; 1526 } 1527 1528 mutex_unlock(&conn_id->handler_mutex); 1529 cma_deref_id(conn_id); 1530 1531 out: 1532 if (dev) 1533 dev_put(dev); 1534 mutex_unlock(&listen_id->handler_mutex); 1535 return ret; 1536 } 1537 1538 static int cma_ib_listen(struct rdma_id_private *id_priv) 1539 { 1540 struct ib_cm_compare_data compare_data; 1541 struct sockaddr *addr; 1542 struct ib_cm_id *id; 1543 __be64 svc_id; 1544 int ret; 1545 1546 id = ib_create_cm_id(id_priv->id.device, cma_req_handler, id_priv); 1547 if (IS_ERR(id)) 1548 return PTR_ERR(id); 1549 1550 id_priv->cm_id.ib = id; 1551 1552 addr = cma_src_addr(id_priv); 1553 svc_id = rdma_get_service_id(&id_priv->id, addr); 1554 if (cma_any_addr(addr) && !id_priv->afonly) 1555 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL); 1556 else { 1557 cma_set_compare_data(id_priv->id.ps, addr, &compare_data); 1558 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data); 1559 } 1560 1561 if (ret) { 1562 ib_destroy_cm_id(id_priv->cm_id.ib); 1563 id_priv->cm_id.ib = NULL; 1564 } 1565 1566 return ret; 1567 } 1568 1569 static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog) 1570 { 1571 int ret; 1572 struct iw_cm_id *id; 1573 1574 id = iw_create_cm_id(id_priv->id.device, 1575 iw_conn_req_handler, 1576 id_priv); 1577 if (IS_ERR(id)) 1578 return PTR_ERR(id); 1579 1580 id_priv->cm_id.iw = id; 1581 1582 memcpy(&id_priv->cm_id.iw->local_addr, cma_src_addr(id_priv), 1583 rdma_addr_size(cma_src_addr(id_priv))); 1584 1585 ret = iw_cm_listen(id_priv->cm_id.iw, backlog); 1586 1587 if (ret) { 1588 iw_destroy_cm_id(id_priv->cm_id.iw); 1589 id_priv->cm_id.iw = NULL; 1590 } 1591 1592 return ret; 1593 } 1594 1595 static int cma_listen_handler(struct rdma_cm_id *id, 1596 struct rdma_cm_event *event) 1597 { 1598 struct rdma_id_private *id_priv = id->context; 1599 1600 id->context = id_priv->id.context; 1601 id->event_handler = id_priv->id.event_handler; 1602 return id_priv->id.event_handler(id, event); 1603 } 1604 1605 static void cma_listen_on_dev(struct rdma_id_private *id_priv, 1606 struct cma_device *cma_dev) 1607 { 1608 struct rdma_id_private *dev_id_priv; 1609 struct rdma_cm_id *id; 1610 int ret; 1611 1612 if (cma_family(id_priv) == AF_IB && 1613 rdma_node_get_transport(cma_dev->device->node_type) != RDMA_TRANSPORT_IB) 1614 return; 1615 1616 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps, 1617 id_priv->id.qp_type); 1618 if (IS_ERR(id)) 1619 return; 1620 1621 dev_id_priv = container_of(id, struct rdma_id_private, id); 1622 1623 dev_id_priv->state = RDMA_CM_ADDR_BOUND; 1624 memcpy(cma_src_addr(dev_id_priv), cma_src_addr(id_priv), 1625 rdma_addr_size(cma_src_addr(id_priv))); 1626 1627 cma_attach_to_dev(dev_id_priv, cma_dev); 1628 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list); 1629 atomic_inc(&id_priv->refcount); 1630 dev_id_priv->internal_id = 1; 1631 dev_id_priv->afonly = id_priv->afonly; 1632 1633 ret = rdma_listen(id, id_priv->backlog); 1634 if (ret) 1635 printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, " 1636 "listening on device %s\n", ret, cma_dev->device->name); 1637 } 1638 1639 static void cma_listen_on_all(struct rdma_id_private *id_priv) 1640 { 1641 struct cma_device *cma_dev; 1642 1643 mutex_lock(&lock); 1644 list_add_tail(&id_priv->list, &listen_any_list); 1645 list_for_each_entry(cma_dev, &dev_list, list) 1646 cma_listen_on_dev(id_priv, cma_dev); 1647 mutex_unlock(&lock); 1648 } 1649 1650 void rdma_set_service_type(struct rdma_cm_id *id, int tos) 1651 { 1652 struct rdma_id_private *id_priv; 1653 1654 id_priv = container_of(id, struct rdma_id_private, id); 1655 id_priv->tos = (u8) tos; 1656 } 1657 EXPORT_SYMBOL(rdma_set_service_type); 1658 1659 static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec, 1660 void *context) 1661 { 1662 struct cma_work *work = context; 1663 struct rdma_route *route; 1664 1665 route = &work->id->id.route; 1666 1667 if (!status) { 1668 route->num_paths = 1; 1669 *route->path_rec = *path_rec; 1670 } else { 1671 work->old_state = RDMA_CM_ROUTE_QUERY; 1672 work->new_state = RDMA_CM_ADDR_RESOLVED; 1673 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR; 1674 work->event.status = status; 1675 } 1676 1677 queue_work(cma_wq, &work->work); 1678 } 1679 1680 static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms, 1681 struct cma_work *work) 1682 { 1683 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 1684 struct ib_sa_path_rec path_rec; 1685 ib_sa_comp_mask comp_mask; 1686 struct sockaddr_in6 *sin6; 1687 struct sockaddr_ib *sib; 1688 1689 memset(&path_rec, 0, sizeof path_rec); 1690 rdma_addr_get_sgid(dev_addr, &path_rec.sgid); 1691 rdma_addr_get_dgid(dev_addr, &path_rec.dgid); 1692 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); 1693 path_rec.numb_path = 1; 1694 path_rec.reversible = 1; 1695 path_rec.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv)); 1696 1697 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID | 1698 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH | 1699 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID; 1700 1701 switch (cma_family(id_priv)) { 1702 case AF_INET: 1703 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos); 1704 comp_mask |= IB_SA_PATH_REC_QOS_CLASS; 1705 break; 1706 case AF_INET6: 1707 sin6 = (struct sockaddr_in6 *) cma_src_addr(id_priv); 1708 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20); 1709 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS; 1710 break; 1711 case AF_IB: 1712 sib = (struct sockaddr_ib *) cma_src_addr(id_priv); 1713 path_rec.traffic_class = (u8) (be32_to_cpu(sib->sib_flowinfo) >> 20); 1714 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS; 1715 break; 1716 } 1717 1718 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device, 1719 id_priv->id.port_num, &path_rec, 1720 comp_mask, timeout_ms, 1721 GFP_KERNEL, cma_query_handler, 1722 work, &id_priv->query); 1723 1724 return (id_priv->query_id < 0) ? id_priv->query_id : 0; 1725 } 1726 1727 static void cma_work_handler(struct work_struct *_work) 1728 { 1729 struct cma_work *work = container_of(_work, struct cma_work, work); 1730 struct rdma_id_private *id_priv = work->id; 1731 int destroy = 0; 1732 1733 mutex_lock(&id_priv->handler_mutex); 1734 if (!cma_comp_exch(id_priv, work->old_state, work->new_state)) 1735 goto out; 1736 1737 if (id_priv->id.event_handler(&id_priv->id, &work->event)) { 1738 cma_exch(id_priv, RDMA_CM_DESTROYING); 1739 destroy = 1; 1740 } 1741 out: 1742 mutex_unlock(&id_priv->handler_mutex); 1743 cma_deref_id(id_priv); 1744 if (destroy) 1745 rdma_destroy_id(&id_priv->id); 1746 kfree(work); 1747 } 1748 1749 static void cma_ndev_work_handler(struct work_struct *_work) 1750 { 1751 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work); 1752 struct rdma_id_private *id_priv = work->id; 1753 int destroy = 0; 1754 1755 mutex_lock(&id_priv->handler_mutex); 1756 if (id_priv->state == RDMA_CM_DESTROYING || 1757 id_priv->state == RDMA_CM_DEVICE_REMOVAL) 1758 goto out; 1759 1760 if (id_priv->id.event_handler(&id_priv->id, &work->event)) { 1761 cma_exch(id_priv, RDMA_CM_DESTROYING); 1762 destroy = 1; 1763 } 1764 1765 out: 1766 mutex_unlock(&id_priv->handler_mutex); 1767 cma_deref_id(id_priv); 1768 if (destroy) 1769 rdma_destroy_id(&id_priv->id); 1770 kfree(work); 1771 } 1772 1773 static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms) 1774 { 1775 struct rdma_route *route = &id_priv->id.route; 1776 struct cma_work *work; 1777 int ret; 1778 1779 work = kzalloc(sizeof *work, GFP_KERNEL); 1780 if (!work) 1781 return -ENOMEM; 1782 1783 work->id = id_priv; 1784 INIT_WORK(&work->work, cma_work_handler); 1785 work->old_state = RDMA_CM_ROUTE_QUERY; 1786 work->new_state = RDMA_CM_ROUTE_RESOLVED; 1787 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 1788 1789 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL); 1790 if (!route->path_rec) { 1791 ret = -ENOMEM; 1792 goto err1; 1793 } 1794 1795 ret = cma_query_ib_route(id_priv, timeout_ms, work); 1796 if (ret) 1797 goto err2; 1798 1799 return 0; 1800 err2: 1801 kfree(route->path_rec); 1802 route->path_rec = NULL; 1803 err1: 1804 kfree(work); 1805 return ret; 1806 } 1807 1808 int rdma_set_ib_paths(struct rdma_cm_id *id, 1809 struct ib_sa_path_rec *path_rec, int num_paths) 1810 { 1811 struct rdma_id_private *id_priv; 1812 int ret; 1813 1814 id_priv = container_of(id, struct rdma_id_private, id); 1815 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, 1816 RDMA_CM_ROUTE_RESOLVED)) 1817 return -EINVAL; 1818 1819 id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths, 1820 GFP_KERNEL); 1821 if (!id->route.path_rec) { 1822 ret = -ENOMEM; 1823 goto err; 1824 } 1825 1826 id->route.num_paths = num_paths; 1827 return 0; 1828 err: 1829 cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED); 1830 return ret; 1831 } 1832 EXPORT_SYMBOL(rdma_set_ib_paths); 1833 1834 static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms) 1835 { 1836 struct cma_work *work; 1837 1838 work = kzalloc(sizeof *work, GFP_KERNEL); 1839 if (!work) 1840 return -ENOMEM; 1841 1842 work->id = id_priv; 1843 INIT_WORK(&work->work, cma_work_handler); 1844 work->old_state = RDMA_CM_ROUTE_QUERY; 1845 work->new_state = RDMA_CM_ROUTE_RESOLVED; 1846 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 1847 queue_work(cma_wq, &work->work); 1848 return 0; 1849 } 1850 1851 static int cma_resolve_iboe_route(struct rdma_id_private *id_priv) 1852 { 1853 struct rdma_route *route = &id_priv->id.route; 1854 struct rdma_addr *addr = &route->addr; 1855 struct cma_work *work; 1856 int ret; 1857 struct net_device *ndev = NULL; 1858 u16 vid; 1859 1860 work = kzalloc(sizeof *work, GFP_KERNEL); 1861 if (!work) 1862 return -ENOMEM; 1863 1864 work->id = id_priv; 1865 INIT_WORK(&work->work, cma_work_handler); 1866 1867 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL); 1868 if (!route->path_rec) { 1869 ret = -ENOMEM; 1870 goto err1; 1871 } 1872 1873 route->num_paths = 1; 1874 1875 if (addr->dev_addr.bound_dev_if) 1876 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if); 1877 if (!ndev) { 1878 ret = -ENODEV; 1879 goto err2; 1880 } 1881 1882 vid = rdma_vlan_dev_vlan_id(ndev); 1883 1884 iboe_mac_vlan_to_ll(&route->path_rec->sgid, addr->dev_addr.src_dev_addr, vid); 1885 iboe_mac_vlan_to_ll(&route->path_rec->dgid, addr->dev_addr.dst_dev_addr, vid); 1886 1887 route->path_rec->hop_limit = 1; 1888 route->path_rec->reversible = 1; 1889 route->path_rec->pkey = cpu_to_be16(0xffff); 1890 route->path_rec->mtu_selector = IB_SA_EQ; 1891 route->path_rec->sl = netdev_get_prio_tc_map( 1892 ndev->priv_flags & IFF_802_1Q_VLAN ? 1893 vlan_dev_real_dev(ndev) : ndev, 1894 rt_tos2priority(id_priv->tos)); 1895 1896 route->path_rec->mtu = iboe_get_mtu(ndev->mtu); 1897 route->path_rec->rate_selector = IB_SA_EQ; 1898 route->path_rec->rate = iboe_get_rate(ndev); 1899 dev_put(ndev); 1900 route->path_rec->packet_life_time_selector = IB_SA_EQ; 1901 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME; 1902 if (!route->path_rec->mtu) { 1903 ret = -EINVAL; 1904 goto err2; 1905 } 1906 1907 work->old_state = RDMA_CM_ROUTE_QUERY; 1908 work->new_state = RDMA_CM_ROUTE_RESOLVED; 1909 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 1910 work->event.status = 0; 1911 1912 queue_work(cma_wq, &work->work); 1913 1914 return 0; 1915 1916 err2: 1917 kfree(route->path_rec); 1918 route->path_rec = NULL; 1919 err1: 1920 kfree(work); 1921 return ret; 1922 } 1923 1924 int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms) 1925 { 1926 struct rdma_id_private *id_priv; 1927 int ret; 1928 1929 id_priv = container_of(id, struct rdma_id_private, id); 1930 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY)) 1931 return -EINVAL; 1932 1933 atomic_inc(&id_priv->refcount); 1934 switch (rdma_node_get_transport(id->device->node_type)) { 1935 case RDMA_TRANSPORT_IB: 1936 switch (rdma_port_get_link_layer(id->device, id->port_num)) { 1937 case IB_LINK_LAYER_INFINIBAND: 1938 ret = cma_resolve_ib_route(id_priv, timeout_ms); 1939 break; 1940 case IB_LINK_LAYER_ETHERNET: 1941 ret = cma_resolve_iboe_route(id_priv); 1942 break; 1943 default: 1944 ret = -ENOSYS; 1945 } 1946 break; 1947 case RDMA_TRANSPORT_IWARP: 1948 ret = cma_resolve_iw_route(id_priv, timeout_ms); 1949 break; 1950 default: 1951 ret = -ENOSYS; 1952 break; 1953 } 1954 if (ret) 1955 goto err; 1956 1957 return 0; 1958 err: 1959 cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED); 1960 cma_deref_id(id_priv); 1961 return ret; 1962 } 1963 EXPORT_SYMBOL(rdma_resolve_route); 1964 1965 static void cma_set_loopback(struct sockaddr *addr) 1966 { 1967 switch (addr->sa_family) { 1968 case AF_INET: 1969 ((struct sockaddr_in *) addr)->sin_addr.s_addr = htonl(INADDR_LOOPBACK); 1970 break; 1971 case AF_INET6: 1972 ipv6_addr_set(&((struct sockaddr_in6 *) addr)->sin6_addr, 1973 0, 0, 0, htonl(1)); 1974 break; 1975 default: 1976 ib_addr_set(&((struct sockaddr_ib *) addr)->sib_addr, 1977 0, 0, 0, htonl(1)); 1978 break; 1979 } 1980 } 1981 1982 static int cma_bind_loopback(struct rdma_id_private *id_priv) 1983 { 1984 struct cma_device *cma_dev, *cur_dev; 1985 struct ib_port_attr port_attr; 1986 union ib_gid gid; 1987 u16 pkey; 1988 int ret; 1989 u8 p; 1990 1991 cma_dev = NULL; 1992 mutex_lock(&lock); 1993 list_for_each_entry(cur_dev, &dev_list, list) { 1994 if (cma_family(id_priv) == AF_IB && 1995 rdma_node_get_transport(cur_dev->device->node_type) != RDMA_TRANSPORT_IB) 1996 continue; 1997 1998 if (!cma_dev) 1999 cma_dev = cur_dev; 2000 2001 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) { 2002 if (!ib_query_port(cur_dev->device, p, &port_attr) && 2003 port_attr.state == IB_PORT_ACTIVE) { 2004 cma_dev = cur_dev; 2005 goto port_found; 2006 } 2007 } 2008 } 2009 2010 if (!cma_dev) { 2011 ret = -ENODEV; 2012 goto out; 2013 } 2014 2015 p = 1; 2016 2017 port_found: 2018 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid); 2019 if (ret) 2020 goto out; 2021 2022 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey); 2023 if (ret) 2024 goto out; 2025 2026 id_priv->id.route.addr.dev_addr.dev_type = 2027 (rdma_port_get_link_layer(cma_dev->device, p) == IB_LINK_LAYER_INFINIBAND) ? 2028 ARPHRD_INFINIBAND : ARPHRD_ETHER; 2029 2030 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid); 2031 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey); 2032 id_priv->id.port_num = p; 2033 cma_attach_to_dev(id_priv, cma_dev); 2034 cma_set_loopback(cma_src_addr(id_priv)); 2035 out: 2036 mutex_unlock(&lock); 2037 return ret; 2038 } 2039 2040 static void addr_handler(int status, struct sockaddr *src_addr, 2041 struct rdma_dev_addr *dev_addr, void *context) 2042 { 2043 struct rdma_id_private *id_priv = context; 2044 struct rdma_cm_event event; 2045 2046 memset(&event, 0, sizeof event); 2047 mutex_lock(&id_priv->handler_mutex); 2048 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, 2049 RDMA_CM_ADDR_RESOLVED)) 2050 goto out; 2051 2052 if (!status && !id_priv->cma_dev) 2053 status = cma_acquire_dev(id_priv); 2054 2055 if (status) { 2056 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, 2057 RDMA_CM_ADDR_BOUND)) 2058 goto out; 2059 event.event = RDMA_CM_EVENT_ADDR_ERROR; 2060 event.status = status; 2061 } else { 2062 memcpy(cma_src_addr(id_priv), src_addr, rdma_addr_size(src_addr)); 2063 event.event = RDMA_CM_EVENT_ADDR_RESOLVED; 2064 } 2065 2066 if (id_priv->id.event_handler(&id_priv->id, &event)) { 2067 cma_exch(id_priv, RDMA_CM_DESTROYING); 2068 mutex_unlock(&id_priv->handler_mutex); 2069 cma_deref_id(id_priv); 2070 rdma_destroy_id(&id_priv->id); 2071 return; 2072 } 2073 out: 2074 mutex_unlock(&id_priv->handler_mutex); 2075 cma_deref_id(id_priv); 2076 } 2077 2078 static int cma_resolve_loopback(struct rdma_id_private *id_priv) 2079 { 2080 struct cma_work *work; 2081 union ib_gid gid; 2082 int ret; 2083 2084 work = kzalloc(sizeof *work, GFP_KERNEL); 2085 if (!work) 2086 return -ENOMEM; 2087 2088 if (!id_priv->cma_dev) { 2089 ret = cma_bind_loopback(id_priv); 2090 if (ret) 2091 goto err; 2092 } 2093 2094 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid); 2095 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid); 2096 2097 work->id = id_priv; 2098 INIT_WORK(&work->work, cma_work_handler); 2099 work->old_state = RDMA_CM_ADDR_QUERY; 2100 work->new_state = RDMA_CM_ADDR_RESOLVED; 2101 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED; 2102 queue_work(cma_wq, &work->work); 2103 return 0; 2104 err: 2105 kfree(work); 2106 return ret; 2107 } 2108 2109 static int cma_resolve_ib_addr(struct rdma_id_private *id_priv) 2110 { 2111 struct cma_work *work; 2112 int ret; 2113 2114 work = kzalloc(sizeof *work, GFP_KERNEL); 2115 if (!work) 2116 return -ENOMEM; 2117 2118 if (!id_priv->cma_dev) { 2119 ret = cma_resolve_ib_dev(id_priv); 2120 if (ret) 2121 goto err; 2122 } 2123 2124 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, (union ib_gid *) 2125 &(((struct sockaddr_ib *) &id_priv->id.route.addr.dst_addr)->sib_addr)); 2126 2127 work->id = id_priv; 2128 INIT_WORK(&work->work, cma_work_handler); 2129 work->old_state = RDMA_CM_ADDR_QUERY; 2130 work->new_state = RDMA_CM_ADDR_RESOLVED; 2131 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED; 2132 queue_work(cma_wq, &work->work); 2133 return 0; 2134 err: 2135 kfree(work); 2136 return ret; 2137 } 2138 2139 static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, 2140 struct sockaddr *dst_addr) 2141 { 2142 if (!src_addr || !src_addr->sa_family) { 2143 src_addr = (struct sockaddr *) &id->route.addr.src_addr; 2144 src_addr->sa_family = dst_addr->sa_family; 2145 if (dst_addr->sa_family == AF_INET6) { 2146 ((struct sockaddr_in6 *) src_addr)->sin6_scope_id = 2147 ((struct sockaddr_in6 *) dst_addr)->sin6_scope_id; 2148 } else if (dst_addr->sa_family == AF_IB) { 2149 ((struct sockaddr_ib *) src_addr)->sib_pkey = 2150 ((struct sockaddr_ib *) dst_addr)->sib_pkey; 2151 } 2152 } 2153 return rdma_bind_addr(id, src_addr); 2154 } 2155 2156 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, 2157 struct sockaddr *dst_addr, int timeout_ms) 2158 { 2159 struct rdma_id_private *id_priv; 2160 int ret; 2161 2162 id_priv = container_of(id, struct rdma_id_private, id); 2163 if (id_priv->state == RDMA_CM_IDLE) { 2164 ret = cma_bind_addr(id, src_addr, dst_addr); 2165 if (ret) 2166 return ret; 2167 } 2168 2169 if (cma_family(id_priv) != dst_addr->sa_family) 2170 return -EINVAL; 2171 2172 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY)) 2173 return -EINVAL; 2174 2175 atomic_inc(&id_priv->refcount); 2176 memcpy(cma_dst_addr(id_priv), dst_addr, rdma_addr_size(dst_addr)); 2177 if (cma_any_addr(dst_addr)) { 2178 ret = cma_resolve_loopback(id_priv); 2179 } else { 2180 if (dst_addr->sa_family == AF_IB) { 2181 ret = cma_resolve_ib_addr(id_priv); 2182 } else { 2183 ret = rdma_resolve_ip(&addr_client, cma_src_addr(id_priv), 2184 dst_addr, &id->route.addr.dev_addr, 2185 timeout_ms, addr_handler, id_priv); 2186 } 2187 } 2188 if (ret) 2189 goto err; 2190 2191 return 0; 2192 err: 2193 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND); 2194 cma_deref_id(id_priv); 2195 return ret; 2196 } 2197 EXPORT_SYMBOL(rdma_resolve_addr); 2198 2199 int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse) 2200 { 2201 struct rdma_id_private *id_priv; 2202 unsigned long flags; 2203 int ret; 2204 2205 id_priv = container_of(id, struct rdma_id_private, id); 2206 spin_lock_irqsave(&id_priv->lock, flags); 2207 if (reuse || id_priv->state == RDMA_CM_IDLE) { 2208 id_priv->reuseaddr = reuse; 2209 ret = 0; 2210 } else { 2211 ret = -EINVAL; 2212 } 2213 spin_unlock_irqrestore(&id_priv->lock, flags); 2214 return ret; 2215 } 2216 EXPORT_SYMBOL(rdma_set_reuseaddr); 2217 2218 int rdma_set_afonly(struct rdma_cm_id *id, int afonly) 2219 { 2220 struct rdma_id_private *id_priv; 2221 unsigned long flags; 2222 int ret; 2223 2224 id_priv = container_of(id, struct rdma_id_private, id); 2225 spin_lock_irqsave(&id_priv->lock, flags); 2226 if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) { 2227 id_priv->options |= (1 << CMA_OPTION_AFONLY); 2228 id_priv->afonly = afonly; 2229 ret = 0; 2230 } else { 2231 ret = -EINVAL; 2232 } 2233 spin_unlock_irqrestore(&id_priv->lock, flags); 2234 return ret; 2235 } 2236 EXPORT_SYMBOL(rdma_set_afonly); 2237 2238 static void cma_bind_port(struct rdma_bind_list *bind_list, 2239 struct rdma_id_private *id_priv) 2240 { 2241 struct sockaddr *addr; 2242 struct sockaddr_ib *sib; 2243 u64 sid, mask; 2244 __be16 port; 2245 2246 addr = cma_src_addr(id_priv); 2247 port = htons(bind_list->port); 2248 2249 switch (addr->sa_family) { 2250 case AF_INET: 2251 ((struct sockaddr_in *) addr)->sin_port = port; 2252 break; 2253 case AF_INET6: 2254 ((struct sockaddr_in6 *) addr)->sin6_port = port; 2255 break; 2256 case AF_IB: 2257 sib = (struct sockaddr_ib *) addr; 2258 sid = be64_to_cpu(sib->sib_sid); 2259 mask = be64_to_cpu(sib->sib_sid_mask); 2260 sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port)); 2261 sib->sib_sid_mask = cpu_to_be64(~0ULL); 2262 break; 2263 } 2264 id_priv->bind_list = bind_list; 2265 hlist_add_head(&id_priv->node, &bind_list->owners); 2266 } 2267 2268 static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv, 2269 unsigned short snum) 2270 { 2271 struct rdma_bind_list *bind_list; 2272 int ret; 2273 2274 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL); 2275 if (!bind_list) 2276 return -ENOMEM; 2277 2278 ret = idr_alloc(ps, bind_list, snum, snum + 1, GFP_KERNEL); 2279 if (ret < 0) 2280 goto err; 2281 2282 bind_list->ps = ps; 2283 bind_list->port = (unsigned short)ret; 2284 cma_bind_port(bind_list, id_priv); 2285 return 0; 2286 err: 2287 kfree(bind_list); 2288 return ret == -ENOSPC ? -EADDRNOTAVAIL : ret; 2289 } 2290 2291 static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv) 2292 { 2293 static unsigned int last_used_port; 2294 int low, high, remaining; 2295 unsigned int rover; 2296 2297 inet_get_local_port_range(&low, &high); 2298 remaining = (high - low) + 1; 2299 rover = net_random() % remaining + low; 2300 retry: 2301 if (last_used_port != rover && 2302 !idr_find(ps, (unsigned short) rover)) { 2303 int ret = cma_alloc_port(ps, id_priv, rover); 2304 /* 2305 * Remember previously used port number in order to avoid 2306 * re-using same port immediately after it is closed. 2307 */ 2308 if (!ret) 2309 last_used_port = rover; 2310 if (ret != -EADDRNOTAVAIL) 2311 return ret; 2312 } 2313 if (--remaining) { 2314 rover++; 2315 if ((rover < low) || (rover > high)) 2316 rover = low; 2317 goto retry; 2318 } 2319 return -EADDRNOTAVAIL; 2320 } 2321 2322 /* 2323 * Check that the requested port is available. This is called when trying to 2324 * bind to a specific port, or when trying to listen on a bound port. In 2325 * the latter case, the provided id_priv may already be on the bind_list, but 2326 * we still need to check that it's okay to start listening. 2327 */ 2328 static int cma_check_port(struct rdma_bind_list *bind_list, 2329 struct rdma_id_private *id_priv, uint8_t reuseaddr) 2330 { 2331 struct rdma_id_private *cur_id; 2332 struct sockaddr *addr, *cur_addr; 2333 2334 addr = cma_src_addr(id_priv); 2335 hlist_for_each_entry(cur_id, &bind_list->owners, node) { 2336 if (id_priv == cur_id) 2337 continue; 2338 2339 if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr && 2340 cur_id->reuseaddr) 2341 continue; 2342 2343 cur_addr = cma_src_addr(cur_id); 2344 if (id_priv->afonly && cur_id->afonly && 2345 (addr->sa_family != cur_addr->sa_family)) 2346 continue; 2347 2348 if (cma_any_addr(addr) || cma_any_addr(cur_addr)) 2349 return -EADDRNOTAVAIL; 2350 2351 if (!cma_addr_cmp(addr, cur_addr)) 2352 return -EADDRINUSE; 2353 } 2354 return 0; 2355 } 2356 2357 static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv) 2358 { 2359 struct rdma_bind_list *bind_list; 2360 unsigned short snum; 2361 int ret; 2362 2363 snum = ntohs(cma_port(cma_src_addr(id_priv))); 2364 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE)) 2365 return -EACCES; 2366 2367 bind_list = idr_find(ps, snum); 2368 if (!bind_list) { 2369 ret = cma_alloc_port(ps, id_priv, snum); 2370 } else { 2371 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr); 2372 if (!ret) 2373 cma_bind_port(bind_list, id_priv); 2374 } 2375 return ret; 2376 } 2377 2378 static int cma_bind_listen(struct rdma_id_private *id_priv) 2379 { 2380 struct rdma_bind_list *bind_list = id_priv->bind_list; 2381 int ret = 0; 2382 2383 mutex_lock(&lock); 2384 if (bind_list->owners.first->next) 2385 ret = cma_check_port(bind_list, id_priv, 0); 2386 mutex_unlock(&lock); 2387 return ret; 2388 } 2389 2390 static struct idr *cma_select_inet_ps(struct rdma_id_private *id_priv) 2391 { 2392 switch (id_priv->id.ps) { 2393 case RDMA_PS_TCP: 2394 return &tcp_ps; 2395 case RDMA_PS_UDP: 2396 return &udp_ps; 2397 case RDMA_PS_IPOIB: 2398 return &ipoib_ps; 2399 case RDMA_PS_IB: 2400 return &ib_ps; 2401 default: 2402 return NULL; 2403 } 2404 } 2405 2406 static struct idr *cma_select_ib_ps(struct rdma_id_private *id_priv) 2407 { 2408 struct idr *ps = NULL; 2409 struct sockaddr_ib *sib; 2410 u64 sid_ps, mask, sid; 2411 2412 sib = (struct sockaddr_ib *) cma_src_addr(id_priv); 2413 mask = be64_to_cpu(sib->sib_sid_mask) & RDMA_IB_IP_PS_MASK; 2414 sid = be64_to_cpu(sib->sib_sid) & mask; 2415 2416 if ((id_priv->id.ps == RDMA_PS_IB) && (sid == (RDMA_IB_IP_PS_IB & mask))) { 2417 sid_ps = RDMA_IB_IP_PS_IB; 2418 ps = &ib_ps; 2419 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_TCP)) && 2420 (sid == (RDMA_IB_IP_PS_TCP & mask))) { 2421 sid_ps = RDMA_IB_IP_PS_TCP; 2422 ps = &tcp_ps; 2423 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_UDP)) && 2424 (sid == (RDMA_IB_IP_PS_UDP & mask))) { 2425 sid_ps = RDMA_IB_IP_PS_UDP; 2426 ps = &udp_ps; 2427 } 2428 2429 if (ps) { 2430 sib->sib_sid = cpu_to_be64(sid_ps | ntohs(cma_port((struct sockaddr *) sib))); 2431 sib->sib_sid_mask = cpu_to_be64(RDMA_IB_IP_PS_MASK | 2432 be64_to_cpu(sib->sib_sid_mask)); 2433 } 2434 return ps; 2435 } 2436 2437 static int cma_get_port(struct rdma_id_private *id_priv) 2438 { 2439 struct idr *ps; 2440 int ret; 2441 2442 if (cma_family(id_priv) != AF_IB) 2443 ps = cma_select_inet_ps(id_priv); 2444 else 2445 ps = cma_select_ib_ps(id_priv); 2446 if (!ps) 2447 return -EPROTONOSUPPORT; 2448 2449 mutex_lock(&lock); 2450 if (cma_any_port(cma_src_addr(id_priv))) 2451 ret = cma_alloc_any_port(ps, id_priv); 2452 else 2453 ret = cma_use_port(ps, id_priv); 2454 mutex_unlock(&lock); 2455 2456 return ret; 2457 } 2458 2459 static int cma_check_linklocal(struct rdma_dev_addr *dev_addr, 2460 struct sockaddr *addr) 2461 { 2462 #if IS_ENABLED(CONFIG_IPV6) 2463 struct sockaddr_in6 *sin6; 2464 2465 if (addr->sa_family != AF_INET6) 2466 return 0; 2467 2468 sin6 = (struct sockaddr_in6 *) addr; 2469 if ((ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) && 2470 !sin6->sin6_scope_id) 2471 return -EINVAL; 2472 2473 dev_addr->bound_dev_if = sin6->sin6_scope_id; 2474 #endif 2475 return 0; 2476 } 2477 2478 int rdma_listen(struct rdma_cm_id *id, int backlog) 2479 { 2480 struct rdma_id_private *id_priv; 2481 int ret; 2482 2483 id_priv = container_of(id, struct rdma_id_private, id); 2484 if (id_priv->state == RDMA_CM_IDLE) { 2485 id->route.addr.src_addr.ss_family = AF_INET; 2486 ret = rdma_bind_addr(id, cma_src_addr(id_priv)); 2487 if (ret) 2488 return ret; 2489 } 2490 2491 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN)) 2492 return -EINVAL; 2493 2494 if (id_priv->reuseaddr) { 2495 ret = cma_bind_listen(id_priv); 2496 if (ret) 2497 goto err; 2498 } 2499 2500 id_priv->backlog = backlog; 2501 if (id->device) { 2502 switch (rdma_node_get_transport(id->device->node_type)) { 2503 case RDMA_TRANSPORT_IB: 2504 ret = cma_ib_listen(id_priv); 2505 if (ret) 2506 goto err; 2507 break; 2508 case RDMA_TRANSPORT_IWARP: 2509 ret = cma_iw_listen(id_priv, backlog); 2510 if (ret) 2511 goto err; 2512 break; 2513 default: 2514 ret = -ENOSYS; 2515 goto err; 2516 } 2517 } else 2518 cma_listen_on_all(id_priv); 2519 2520 return 0; 2521 err: 2522 id_priv->backlog = 0; 2523 cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND); 2524 return ret; 2525 } 2526 EXPORT_SYMBOL(rdma_listen); 2527 2528 int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr) 2529 { 2530 struct rdma_id_private *id_priv; 2531 int ret; 2532 2533 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6 && 2534 addr->sa_family != AF_IB) 2535 return -EAFNOSUPPORT; 2536 2537 id_priv = container_of(id, struct rdma_id_private, id); 2538 if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND)) 2539 return -EINVAL; 2540 2541 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr); 2542 if (ret) 2543 goto err1; 2544 2545 if (!cma_any_addr(addr)) { 2546 ret = cma_translate_addr(addr, &id->route.addr.dev_addr); 2547 if (ret) 2548 goto err1; 2549 2550 ret = cma_acquire_dev(id_priv); 2551 if (ret) 2552 goto err1; 2553 } 2554 2555 memcpy(cma_src_addr(id_priv), addr, rdma_addr_size(addr)); 2556 if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) { 2557 if (addr->sa_family == AF_INET) 2558 id_priv->afonly = 1; 2559 #if IS_ENABLED(CONFIG_IPV6) 2560 else if (addr->sa_family == AF_INET6) 2561 id_priv->afonly = init_net.ipv6.sysctl.bindv6only; 2562 #endif 2563 } 2564 ret = cma_get_port(id_priv); 2565 if (ret) 2566 goto err2; 2567 2568 return 0; 2569 err2: 2570 if (id_priv->cma_dev) 2571 cma_release_dev(id_priv); 2572 err1: 2573 cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE); 2574 return ret; 2575 } 2576 EXPORT_SYMBOL(rdma_bind_addr); 2577 2578 static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv) 2579 { 2580 struct cma_hdr *cma_hdr; 2581 2582 cma_hdr = hdr; 2583 cma_hdr->cma_version = CMA_VERSION; 2584 if (cma_family(id_priv) == AF_INET) { 2585 struct sockaddr_in *src4, *dst4; 2586 2587 src4 = (struct sockaddr_in *) cma_src_addr(id_priv); 2588 dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv); 2589 2590 cma_set_ip_ver(cma_hdr, 4); 2591 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; 2592 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; 2593 cma_hdr->port = src4->sin_port; 2594 } else if (cma_family(id_priv) == AF_INET6) { 2595 struct sockaddr_in6 *src6, *dst6; 2596 2597 src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv); 2598 dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv); 2599 2600 cma_set_ip_ver(cma_hdr, 6); 2601 cma_hdr->src_addr.ip6 = src6->sin6_addr; 2602 cma_hdr->dst_addr.ip6 = dst6->sin6_addr; 2603 cma_hdr->port = src6->sin6_port; 2604 } 2605 return 0; 2606 } 2607 2608 static int cma_sidr_rep_handler(struct ib_cm_id *cm_id, 2609 struct ib_cm_event *ib_event) 2610 { 2611 struct rdma_id_private *id_priv = cm_id->context; 2612 struct rdma_cm_event event; 2613 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd; 2614 int ret = 0; 2615 2616 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT)) 2617 return 0; 2618 2619 memset(&event, 0, sizeof event); 2620 switch (ib_event->event) { 2621 case IB_CM_SIDR_REQ_ERROR: 2622 event.event = RDMA_CM_EVENT_UNREACHABLE; 2623 event.status = -ETIMEDOUT; 2624 break; 2625 case IB_CM_SIDR_REP_RECEIVED: 2626 event.param.ud.private_data = ib_event->private_data; 2627 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE; 2628 if (rep->status != IB_SIDR_SUCCESS) { 2629 event.event = RDMA_CM_EVENT_UNREACHABLE; 2630 event.status = ib_event->param.sidr_rep_rcvd.status; 2631 break; 2632 } 2633 ret = cma_set_qkey(id_priv, rep->qkey); 2634 if (ret) { 2635 event.event = RDMA_CM_EVENT_ADDR_ERROR; 2636 event.status = ret; 2637 break; 2638 } 2639 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num, 2640 id_priv->id.route.path_rec, 2641 &event.param.ud.ah_attr); 2642 event.param.ud.qp_num = rep->qpn; 2643 event.param.ud.qkey = rep->qkey; 2644 event.event = RDMA_CM_EVENT_ESTABLISHED; 2645 event.status = 0; 2646 break; 2647 default: 2648 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n", 2649 ib_event->event); 2650 goto out; 2651 } 2652 2653 ret = id_priv->id.event_handler(&id_priv->id, &event); 2654 if (ret) { 2655 /* Destroy the CM ID by returning a non-zero value. */ 2656 id_priv->cm_id.ib = NULL; 2657 cma_exch(id_priv, RDMA_CM_DESTROYING); 2658 mutex_unlock(&id_priv->handler_mutex); 2659 rdma_destroy_id(&id_priv->id); 2660 return ret; 2661 } 2662 out: 2663 mutex_unlock(&id_priv->handler_mutex); 2664 return ret; 2665 } 2666 2667 static int cma_resolve_ib_udp(struct rdma_id_private *id_priv, 2668 struct rdma_conn_param *conn_param) 2669 { 2670 struct ib_cm_sidr_req_param req; 2671 struct ib_cm_id *id; 2672 void *private_data; 2673 int offset, ret; 2674 2675 memset(&req, 0, sizeof req); 2676 offset = cma_user_data_offset(id_priv); 2677 req.private_data_len = offset + conn_param->private_data_len; 2678 if (req.private_data_len < conn_param->private_data_len) 2679 return -EINVAL; 2680 2681 if (req.private_data_len) { 2682 private_data = kzalloc(req.private_data_len, GFP_ATOMIC); 2683 if (!private_data) 2684 return -ENOMEM; 2685 } else { 2686 private_data = NULL; 2687 } 2688 2689 if (conn_param->private_data && conn_param->private_data_len) 2690 memcpy(private_data + offset, conn_param->private_data, 2691 conn_param->private_data_len); 2692 2693 if (private_data) { 2694 ret = cma_format_hdr(private_data, id_priv); 2695 if (ret) 2696 goto out; 2697 req.private_data = private_data; 2698 } 2699 2700 id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler, 2701 id_priv); 2702 if (IS_ERR(id)) { 2703 ret = PTR_ERR(id); 2704 goto out; 2705 } 2706 id_priv->cm_id.ib = id; 2707 2708 req.path = id_priv->id.route.path_rec; 2709 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv)); 2710 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8); 2711 req.max_cm_retries = CMA_MAX_CM_RETRIES; 2712 2713 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req); 2714 if (ret) { 2715 ib_destroy_cm_id(id_priv->cm_id.ib); 2716 id_priv->cm_id.ib = NULL; 2717 } 2718 out: 2719 kfree(private_data); 2720 return ret; 2721 } 2722 2723 static int cma_connect_ib(struct rdma_id_private *id_priv, 2724 struct rdma_conn_param *conn_param) 2725 { 2726 struct ib_cm_req_param req; 2727 struct rdma_route *route; 2728 void *private_data; 2729 struct ib_cm_id *id; 2730 int offset, ret; 2731 2732 memset(&req, 0, sizeof req); 2733 offset = cma_user_data_offset(id_priv); 2734 req.private_data_len = offset + conn_param->private_data_len; 2735 if (req.private_data_len < conn_param->private_data_len) 2736 return -EINVAL; 2737 2738 if (req.private_data_len) { 2739 private_data = kzalloc(req.private_data_len, GFP_ATOMIC); 2740 if (!private_data) 2741 return -ENOMEM; 2742 } else { 2743 private_data = NULL; 2744 } 2745 2746 if (conn_param->private_data && conn_param->private_data_len) 2747 memcpy(private_data + offset, conn_param->private_data, 2748 conn_param->private_data_len); 2749 2750 id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv); 2751 if (IS_ERR(id)) { 2752 ret = PTR_ERR(id); 2753 goto out; 2754 } 2755 id_priv->cm_id.ib = id; 2756 2757 route = &id_priv->id.route; 2758 if (private_data) { 2759 ret = cma_format_hdr(private_data, id_priv); 2760 if (ret) 2761 goto out; 2762 req.private_data = private_data; 2763 } 2764 2765 req.primary_path = &route->path_rec[0]; 2766 if (route->num_paths == 2) 2767 req.alternate_path = &route->path_rec[1]; 2768 2769 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv)); 2770 req.qp_num = id_priv->qp_num; 2771 req.qp_type = id_priv->id.qp_type; 2772 req.starting_psn = id_priv->seq_num; 2773 req.responder_resources = conn_param->responder_resources; 2774 req.initiator_depth = conn_param->initiator_depth; 2775 req.flow_control = conn_param->flow_control; 2776 req.retry_count = min_t(u8, 7, conn_param->retry_count); 2777 req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count); 2778 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; 2779 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; 2780 req.max_cm_retries = CMA_MAX_CM_RETRIES; 2781 req.srq = id_priv->srq ? 1 : 0; 2782 2783 ret = ib_send_cm_req(id_priv->cm_id.ib, &req); 2784 out: 2785 if (ret && !IS_ERR(id)) { 2786 ib_destroy_cm_id(id); 2787 id_priv->cm_id.ib = NULL; 2788 } 2789 2790 kfree(private_data); 2791 return ret; 2792 } 2793 2794 static int cma_connect_iw(struct rdma_id_private *id_priv, 2795 struct rdma_conn_param *conn_param) 2796 { 2797 struct iw_cm_id *cm_id; 2798 int ret; 2799 struct iw_cm_conn_param iw_param; 2800 2801 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv); 2802 if (IS_ERR(cm_id)) 2803 return PTR_ERR(cm_id); 2804 2805 id_priv->cm_id.iw = cm_id; 2806 2807 memcpy(&cm_id->local_addr, cma_src_addr(id_priv), 2808 rdma_addr_size(cma_src_addr(id_priv))); 2809 memcpy(&cm_id->remote_addr, cma_dst_addr(id_priv), 2810 rdma_addr_size(cma_dst_addr(id_priv))); 2811 2812 ret = cma_modify_qp_rtr(id_priv, conn_param); 2813 if (ret) 2814 goto out; 2815 2816 if (conn_param) { 2817 iw_param.ord = conn_param->initiator_depth; 2818 iw_param.ird = conn_param->responder_resources; 2819 iw_param.private_data = conn_param->private_data; 2820 iw_param.private_data_len = conn_param->private_data_len; 2821 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num; 2822 } else { 2823 memset(&iw_param, 0, sizeof iw_param); 2824 iw_param.qpn = id_priv->qp_num; 2825 } 2826 ret = iw_cm_connect(cm_id, &iw_param); 2827 out: 2828 if (ret) { 2829 iw_destroy_cm_id(cm_id); 2830 id_priv->cm_id.iw = NULL; 2831 } 2832 return ret; 2833 } 2834 2835 int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) 2836 { 2837 struct rdma_id_private *id_priv; 2838 int ret; 2839 2840 id_priv = container_of(id, struct rdma_id_private, id); 2841 if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT)) 2842 return -EINVAL; 2843 2844 if (!id->qp) { 2845 id_priv->qp_num = conn_param->qp_num; 2846 id_priv->srq = conn_param->srq; 2847 } 2848 2849 switch (rdma_node_get_transport(id->device->node_type)) { 2850 case RDMA_TRANSPORT_IB: 2851 if (id->qp_type == IB_QPT_UD) 2852 ret = cma_resolve_ib_udp(id_priv, conn_param); 2853 else 2854 ret = cma_connect_ib(id_priv, conn_param); 2855 break; 2856 case RDMA_TRANSPORT_IWARP: 2857 ret = cma_connect_iw(id_priv, conn_param); 2858 break; 2859 default: 2860 ret = -ENOSYS; 2861 break; 2862 } 2863 if (ret) 2864 goto err; 2865 2866 return 0; 2867 err: 2868 cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED); 2869 return ret; 2870 } 2871 EXPORT_SYMBOL(rdma_connect); 2872 2873 static int cma_accept_ib(struct rdma_id_private *id_priv, 2874 struct rdma_conn_param *conn_param) 2875 { 2876 struct ib_cm_rep_param rep; 2877 int ret; 2878 2879 ret = cma_modify_qp_rtr(id_priv, conn_param); 2880 if (ret) 2881 goto out; 2882 2883 ret = cma_modify_qp_rts(id_priv, conn_param); 2884 if (ret) 2885 goto out; 2886 2887 memset(&rep, 0, sizeof rep); 2888 rep.qp_num = id_priv->qp_num; 2889 rep.starting_psn = id_priv->seq_num; 2890 rep.private_data = conn_param->private_data; 2891 rep.private_data_len = conn_param->private_data_len; 2892 rep.responder_resources = conn_param->responder_resources; 2893 rep.initiator_depth = conn_param->initiator_depth; 2894 rep.failover_accepted = 0; 2895 rep.flow_control = conn_param->flow_control; 2896 rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count); 2897 rep.srq = id_priv->srq ? 1 : 0; 2898 2899 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep); 2900 out: 2901 return ret; 2902 } 2903 2904 static int cma_accept_iw(struct rdma_id_private *id_priv, 2905 struct rdma_conn_param *conn_param) 2906 { 2907 struct iw_cm_conn_param iw_param; 2908 int ret; 2909 2910 ret = cma_modify_qp_rtr(id_priv, conn_param); 2911 if (ret) 2912 return ret; 2913 2914 iw_param.ord = conn_param->initiator_depth; 2915 iw_param.ird = conn_param->responder_resources; 2916 iw_param.private_data = conn_param->private_data; 2917 iw_param.private_data_len = conn_param->private_data_len; 2918 if (id_priv->id.qp) { 2919 iw_param.qpn = id_priv->qp_num; 2920 } else 2921 iw_param.qpn = conn_param->qp_num; 2922 2923 return iw_cm_accept(id_priv->cm_id.iw, &iw_param); 2924 } 2925 2926 static int cma_send_sidr_rep(struct rdma_id_private *id_priv, 2927 enum ib_cm_sidr_status status, u32 qkey, 2928 const void *private_data, int private_data_len) 2929 { 2930 struct ib_cm_sidr_rep_param rep; 2931 int ret; 2932 2933 memset(&rep, 0, sizeof rep); 2934 rep.status = status; 2935 if (status == IB_SIDR_SUCCESS) { 2936 ret = cma_set_qkey(id_priv, qkey); 2937 if (ret) 2938 return ret; 2939 rep.qp_num = id_priv->qp_num; 2940 rep.qkey = id_priv->qkey; 2941 } 2942 rep.private_data = private_data; 2943 rep.private_data_len = private_data_len; 2944 2945 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep); 2946 } 2947 2948 int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) 2949 { 2950 struct rdma_id_private *id_priv; 2951 int ret; 2952 2953 id_priv = container_of(id, struct rdma_id_private, id); 2954 2955 id_priv->owner = task_pid_nr(current); 2956 2957 if (!cma_comp(id_priv, RDMA_CM_CONNECT)) 2958 return -EINVAL; 2959 2960 if (!id->qp && conn_param) { 2961 id_priv->qp_num = conn_param->qp_num; 2962 id_priv->srq = conn_param->srq; 2963 } 2964 2965 switch (rdma_node_get_transport(id->device->node_type)) { 2966 case RDMA_TRANSPORT_IB: 2967 if (id->qp_type == IB_QPT_UD) { 2968 if (conn_param) 2969 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS, 2970 conn_param->qkey, 2971 conn_param->private_data, 2972 conn_param->private_data_len); 2973 else 2974 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS, 2975 0, NULL, 0); 2976 } else { 2977 if (conn_param) 2978 ret = cma_accept_ib(id_priv, conn_param); 2979 else 2980 ret = cma_rep_recv(id_priv); 2981 } 2982 break; 2983 case RDMA_TRANSPORT_IWARP: 2984 ret = cma_accept_iw(id_priv, conn_param); 2985 break; 2986 default: 2987 ret = -ENOSYS; 2988 break; 2989 } 2990 2991 if (ret) 2992 goto reject; 2993 2994 return 0; 2995 reject: 2996 cma_modify_qp_err(id_priv); 2997 rdma_reject(id, NULL, 0); 2998 return ret; 2999 } 3000 EXPORT_SYMBOL(rdma_accept); 3001 3002 int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event) 3003 { 3004 struct rdma_id_private *id_priv; 3005 int ret; 3006 3007 id_priv = container_of(id, struct rdma_id_private, id); 3008 if (!id_priv->cm_id.ib) 3009 return -EINVAL; 3010 3011 switch (id->device->node_type) { 3012 case RDMA_NODE_IB_CA: 3013 ret = ib_cm_notify(id_priv->cm_id.ib, event); 3014 break; 3015 default: 3016 ret = 0; 3017 break; 3018 } 3019 return ret; 3020 } 3021 EXPORT_SYMBOL(rdma_notify); 3022 3023 int rdma_reject(struct rdma_cm_id *id, const void *private_data, 3024 u8 private_data_len) 3025 { 3026 struct rdma_id_private *id_priv; 3027 int ret; 3028 3029 id_priv = container_of(id, struct rdma_id_private, id); 3030 if (!id_priv->cm_id.ib) 3031 return -EINVAL; 3032 3033 switch (rdma_node_get_transport(id->device->node_type)) { 3034 case RDMA_TRANSPORT_IB: 3035 if (id->qp_type == IB_QPT_UD) 3036 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0, 3037 private_data, private_data_len); 3038 else 3039 ret = ib_send_cm_rej(id_priv->cm_id.ib, 3040 IB_CM_REJ_CONSUMER_DEFINED, NULL, 3041 0, private_data, private_data_len); 3042 break; 3043 case RDMA_TRANSPORT_IWARP: 3044 ret = iw_cm_reject(id_priv->cm_id.iw, 3045 private_data, private_data_len); 3046 break; 3047 default: 3048 ret = -ENOSYS; 3049 break; 3050 } 3051 return ret; 3052 } 3053 EXPORT_SYMBOL(rdma_reject); 3054 3055 int rdma_disconnect(struct rdma_cm_id *id) 3056 { 3057 struct rdma_id_private *id_priv; 3058 int ret; 3059 3060 id_priv = container_of(id, struct rdma_id_private, id); 3061 if (!id_priv->cm_id.ib) 3062 return -EINVAL; 3063 3064 switch (rdma_node_get_transport(id->device->node_type)) { 3065 case RDMA_TRANSPORT_IB: 3066 ret = cma_modify_qp_err(id_priv); 3067 if (ret) 3068 goto out; 3069 /* Initiate or respond to a disconnect. */ 3070 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0)) 3071 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0); 3072 break; 3073 case RDMA_TRANSPORT_IWARP: 3074 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0); 3075 break; 3076 default: 3077 ret = -EINVAL; 3078 break; 3079 } 3080 out: 3081 return ret; 3082 } 3083 EXPORT_SYMBOL(rdma_disconnect); 3084 3085 static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast) 3086 { 3087 struct rdma_id_private *id_priv; 3088 struct cma_multicast *mc = multicast->context; 3089 struct rdma_cm_event event; 3090 int ret; 3091 3092 id_priv = mc->id_priv; 3093 if (cma_disable_callback(id_priv, RDMA_CM_ADDR_BOUND) && 3094 cma_disable_callback(id_priv, RDMA_CM_ADDR_RESOLVED)) 3095 return 0; 3096 3097 if (!status) 3098 status = cma_set_qkey(id_priv, be32_to_cpu(multicast->rec.qkey)); 3099 mutex_lock(&id_priv->qp_mutex); 3100 if (!status && id_priv->id.qp) 3101 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid, 3102 be16_to_cpu(multicast->rec.mlid)); 3103 mutex_unlock(&id_priv->qp_mutex); 3104 3105 memset(&event, 0, sizeof event); 3106 event.status = status; 3107 event.param.ud.private_data = mc->context; 3108 if (!status) { 3109 event.event = RDMA_CM_EVENT_MULTICAST_JOIN; 3110 ib_init_ah_from_mcmember(id_priv->id.device, 3111 id_priv->id.port_num, &multicast->rec, 3112 &event.param.ud.ah_attr); 3113 event.param.ud.qp_num = 0xFFFFFF; 3114 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey); 3115 } else 3116 event.event = RDMA_CM_EVENT_MULTICAST_ERROR; 3117 3118 ret = id_priv->id.event_handler(&id_priv->id, &event); 3119 if (ret) { 3120 cma_exch(id_priv, RDMA_CM_DESTROYING); 3121 mutex_unlock(&id_priv->handler_mutex); 3122 rdma_destroy_id(&id_priv->id); 3123 return 0; 3124 } 3125 3126 mutex_unlock(&id_priv->handler_mutex); 3127 return 0; 3128 } 3129 3130 static void cma_set_mgid(struct rdma_id_private *id_priv, 3131 struct sockaddr *addr, union ib_gid *mgid) 3132 { 3133 unsigned char mc_map[MAX_ADDR_LEN]; 3134 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 3135 struct sockaddr_in *sin = (struct sockaddr_in *) addr; 3136 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr; 3137 3138 if (cma_any_addr(addr)) { 3139 memset(mgid, 0, sizeof *mgid); 3140 } else if ((addr->sa_family == AF_INET6) && 3141 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) == 3142 0xFF10A01B)) { 3143 /* IPv6 address is an SA assigned MGID. */ 3144 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid); 3145 } else if (addr->sa_family == AF_IB) { 3146 memcpy(mgid, &((struct sockaddr_ib *) addr)->sib_addr, sizeof *mgid); 3147 } else if ((addr->sa_family == AF_INET6)) { 3148 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map); 3149 if (id_priv->id.ps == RDMA_PS_UDP) 3150 mc_map[7] = 0x01; /* Use RDMA CM signature */ 3151 *mgid = *(union ib_gid *) (mc_map + 4); 3152 } else { 3153 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map); 3154 if (id_priv->id.ps == RDMA_PS_UDP) 3155 mc_map[7] = 0x01; /* Use RDMA CM signature */ 3156 *mgid = *(union ib_gid *) (mc_map + 4); 3157 } 3158 } 3159 3160 static int cma_join_ib_multicast(struct rdma_id_private *id_priv, 3161 struct cma_multicast *mc) 3162 { 3163 struct ib_sa_mcmember_rec rec; 3164 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 3165 ib_sa_comp_mask comp_mask; 3166 int ret; 3167 3168 ib_addr_get_mgid(dev_addr, &rec.mgid); 3169 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num, 3170 &rec.mgid, &rec); 3171 if (ret) 3172 return ret; 3173 3174 ret = cma_set_qkey(id_priv, 0); 3175 if (ret) 3176 return ret; 3177 3178 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid); 3179 rec.qkey = cpu_to_be32(id_priv->qkey); 3180 rdma_addr_get_sgid(dev_addr, &rec.port_gid); 3181 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); 3182 rec.join_state = 1; 3183 3184 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID | 3185 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE | 3186 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL | 3187 IB_SA_MCMEMBER_REC_FLOW_LABEL | 3188 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS; 3189 3190 if (id_priv->id.ps == RDMA_PS_IPOIB) 3191 comp_mask |= IB_SA_MCMEMBER_REC_RATE | 3192 IB_SA_MCMEMBER_REC_RATE_SELECTOR | 3193 IB_SA_MCMEMBER_REC_MTU_SELECTOR | 3194 IB_SA_MCMEMBER_REC_MTU | 3195 IB_SA_MCMEMBER_REC_HOP_LIMIT; 3196 3197 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device, 3198 id_priv->id.port_num, &rec, 3199 comp_mask, GFP_KERNEL, 3200 cma_ib_mc_handler, mc); 3201 return PTR_ERR_OR_ZERO(mc->multicast.ib); 3202 } 3203 3204 static void iboe_mcast_work_handler(struct work_struct *work) 3205 { 3206 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work); 3207 struct cma_multicast *mc = mw->mc; 3208 struct ib_sa_multicast *m = mc->multicast.ib; 3209 3210 mc->multicast.ib->context = mc; 3211 cma_ib_mc_handler(0, m); 3212 kref_put(&mc->mcref, release_mc); 3213 kfree(mw); 3214 } 3215 3216 static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid) 3217 { 3218 struct sockaddr_in *sin = (struct sockaddr_in *)addr; 3219 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr; 3220 3221 if (cma_any_addr(addr)) { 3222 memset(mgid, 0, sizeof *mgid); 3223 } else if (addr->sa_family == AF_INET6) { 3224 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid); 3225 } else { 3226 mgid->raw[0] = 0xff; 3227 mgid->raw[1] = 0x0e; 3228 mgid->raw[2] = 0; 3229 mgid->raw[3] = 0; 3230 mgid->raw[4] = 0; 3231 mgid->raw[5] = 0; 3232 mgid->raw[6] = 0; 3233 mgid->raw[7] = 0; 3234 mgid->raw[8] = 0; 3235 mgid->raw[9] = 0; 3236 mgid->raw[10] = 0xff; 3237 mgid->raw[11] = 0xff; 3238 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr; 3239 } 3240 } 3241 3242 static int cma_iboe_join_multicast(struct rdma_id_private *id_priv, 3243 struct cma_multicast *mc) 3244 { 3245 struct iboe_mcast_work *work; 3246 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 3247 int err; 3248 struct sockaddr *addr = (struct sockaddr *)&mc->addr; 3249 struct net_device *ndev = NULL; 3250 3251 if (cma_zero_addr((struct sockaddr *)&mc->addr)) 3252 return -EINVAL; 3253 3254 work = kzalloc(sizeof *work, GFP_KERNEL); 3255 if (!work) 3256 return -ENOMEM; 3257 3258 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL); 3259 if (!mc->multicast.ib) { 3260 err = -ENOMEM; 3261 goto out1; 3262 } 3263 3264 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid); 3265 3266 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff); 3267 if (id_priv->id.ps == RDMA_PS_UDP) 3268 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY); 3269 3270 if (dev_addr->bound_dev_if) 3271 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if); 3272 if (!ndev) { 3273 err = -ENODEV; 3274 goto out2; 3275 } 3276 mc->multicast.ib->rec.rate = iboe_get_rate(ndev); 3277 mc->multicast.ib->rec.hop_limit = 1; 3278 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu); 3279 dev_put(ndev); 3280 if (!mc->multicast.ib->rec.mtu) { 3281 err = -EINVAL; 3282 goto out2; 3283 } 3284 iboe_addr_get_sgid(dev_addr, &mc->multicast.ib->rec.port_gid); 3285 work->id = id_priv; 3286 work->mc = mc; 3287 INIT_WORK(&work->work, iboe_mcast_work_handler); 3288 kref_get(&mc->mcref); 3289 queue_work(cma_wq, &work->work); 3290 3291 return 0; 3292 3293 out2: 3294 kfree(mc->multicast.ib); 3295 out1: 3296 kfree(work); 3297 return err; 3298 } 3299 3300 int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr, 3301 void *context) 3302 { 3303 struct rdma_id_private *id_priv; 3304 struct cma_multicast *mc; 3305 int ret; 3306 3307 id_priv = container_of(id, struct rdma_id_private, id); 3308 if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) && 3309 !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED)) 3310 return -EINVAL; 3311 3312 mc = kmalloc(sizeof *mc, GFP_KERNEL); 3313 if (!mc) 3314 return -ENOMEM; 3315 3316 memcpy(&mc->addr, addr, rdma_addr_size(addr)); 3317 mc->context = context; 3318 mc->id_priv = id_priv; 3319 3320 spin_lock(&id_priv->lock); 3321 list_add(&mc->list, &id_priv->mc_list); 3322 spin_unlock(&id_priv->lock); 3323 3324 switch (rdma_node_get_transport(id->device->node_type)) { 3325 case RDMA_TRANSPORT_IB: 3326 switch (rdma_port_get_link_layer(id->device, id->port_num)) { 3327 case IB_LINK_LAYER_INFINIBAND: 3328 ret = cma_join_ib_multicast(id_priv, mc); 3329 break; 3330 case IB_LINK_LAYER_ETHERNET: 3331 kref_init(&mc->mcref); 3332 ret = cma_iboe_join_multicast(id_priv, mc); 3333 break; 3334 default: 3335 ret = -EINVAL; 3336 } 3337 break; 3338 default: 3339 ret = -ENOSYS; 3340 break; 3341 } 3342 3343 if (ret) { 3344 spin_lock_irq(&id_priv->lock); 3345 list_del(&mc->list); 3346 spin_unlock_irq(&id_priv->lock); 3347 kfree(mc); 3348 } 3349 return ret; 3350 } 3351 EXPORT_SYMBOL(rdma_join_multicast); 3352 3353 void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr) 3354 { 3355 struct rdma_id_private *id_priv; 3356 struct cma_multicast *mc; 3357 3358 id_priv = container_of(id, struct rdma_id_private, id); 3359 spin_lock_irq(&id_priv->lock); 3360 list_for_each_entry(mc, &id_priv->mc_list, list) { 3361 if (!memcmp(&mc->addr, addr, rdma_addr_size(addr))) { 3362 list_del(&mc->list); 3363 spin_unlock_irq(&id_priv->lock); 3364 3365 if (id->qp) 3366 ib_detach_mcast(id->qp, 3367 &mc->multicast.ib->rec.mgid, 3368 be16_to_cpu(mc->multicast.ib->rec.mlid)); 3369 if (rdma_node_get_transport(id_priv->cma_dev->device->node_type) == RDMA_TRANSPORT_IB) { 3370 switch (rdma_port_get_link_layer(id->device, id->port_num)) { 3371 case IB_LINK_LAYER_INFINIBAND: 3372 ib_sa_free_multicast(mc->multicast.ib); 3373 kfree(mc); 3374 break; 3375 case IB_LINK_LAYER_ETHERNET: 3376 kref_put(&mc->mcref, release_mc); 3377 break; 3378 default: 3379 break; 3380 } 3381 } 3382 return; 3383 } 3384 } 3385 spin_unlock_irq(&id_priv->lock); 3386 } 3387 EXPORT_SYMBOL(rdma_leave_multicast); 3388 3389 static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv) 3390 { 3391 struct rdma_dev_addr *dev_addr; 3392 struct cma_ndev_work *work; 3393 3394 dev_addr = &id_priv->id.route.addr.dev_addr; 3395 3396 if ((dev_addr->bound_dev_if == ndev->ifindex) && 3397 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) { 3398 printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n", 3399 ndev->name, &id_priv->id); 3400 work = kzalloc(sizeof *work, GFP_KERNEL); 3401 if (!work) 3402 return -ENOMEM; 3403 3404 INIT_WORK(&work->work, cma_ndev_work_handler); 3405 work->id = id_priv; 3406 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE; 3407 atomic_inc(&id_priv->refcount); 3408 queue_work(cma_wq, &work->work); 3409 } 3410 3411 return 0; 3412 } 3413 3414 static int cma_netdev_callback(struct notifier_block *self, unsigned long event, 3415 void *ptr) 3416 { 3417 struct net_device *ndev = netdev_notifier_info_to_dev(ptr); 3418 struct cma_device *cma_dev; 3419 struct rdma_id_private *id_priv; 3420 int ret = NOTIFY_DONE; 3421 3422 if (dev_net(ndev) != &init_net) 3423 return NOTIFY_DONE; 3424 3425 if (event != NETDEV_BONDING_FAILOVER) 3426 return NOTIFY_DONE; 3427 3428 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING)) 3429 return NOTIFY_DONE; 3430 3431 mutex_lock(&lock); 3432 list_for_each_entry(cma_dev, &dev_list, list) 3433 list_for_each_entry(id_priv, &cma_dev->id_list, list) { 3434 ret = cma_netdev_change(ndev, id_priv); 3435 if (ret) 3436 goto out; 3437 } 3438 3439 out: 3440 mutex_unlock(&lock); 3441 return ret; 3442 } 3443 3444 static struct notifier_block cma_nb = { 3445 .notifier_call = cma_netdev_callback 3446 }; 3447 3448 static void cma_add_one(struct ib_device *device) 3449 { 3450 struct cma_device *cma_dev; 3451 struct rdma_id_private *id_priv; 3452 3453 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL); 3454 if (!cma_dev) 3455 return; 3456 3457 cma_dev->device = device; 3458 3459 init_completion(&cma_dev->comp); 3460 atomic_set(&cma_dev->refcount, 1); 3461 INIT_LIST_HEAD(&cma_dev->id_list); 3462 ib_set_client_data(device, &cma_client, cma_dev); 3463 3464 mutex_lock(&lock); 3465 list_add_tail(&cma_dev->list, &dev_list); 3466 list_for_each_entry(id_priv, &listen_any_list, list) 3467 cma_listen_on_dev(id_priv, cma_dev); 3468 mutex_unlock(&lock); 3469 } 3470 3471 static int cma_remove_id_dev(struct rdma_id_private *id_priv) 3472 { 3473 struct rdma_cm_event event; 3474 enum rdma_cm_state state; 3475 int ret = 0; 3476 3477 /* Record that we want to remove the device */ 3478 state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL); 3479 if (state == RDMA_CM_DESTROYING) 3480 return 0; 3481 3482 cma_cancel_operation(id_priv, state); 3483 mutex_lock(&id_priv->handler_mutex); 3484 3485 /* Check for destruction from another callback. */ 3486 if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL)) 3487 goto out; 3488 3489 memset(&event, 0, sizeof event); 3490 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL; 3491 ret = id_priv->id.event_handler(&id_priv->id, &event); 3492 out: 3493 mutex_unlock(&id_priv->handler_mutex); 3494 return ret; 3495 } 3496 3497 static void cma_process_remove(struct cma_device *cma_dev) 3498 { 3499 struct rdma_id_private *id_priv; 3500 int ret; 3501 3502 mutex_lock(&lock); 3503 while (!list_empty(&cma_dev->id_list)) { 3504 id_priv = list_entry(cma_dev->id_list.next, 3505 struct rdma_id_private, list); 3506 3507 list_del(&id_priv->listen_list); 3508 list_del_init(&id_priv->list); 3509 atomic_inc(&id_priv->refcount); 3510 mutex_unlock(&lock); 3511 3512 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv); 3513 cma_deref_id(id_priv); 3514 if (ret) 3515 rdma_destroy_id(&id_priv->id); 3516 3517 mutex_lock(&lock); 3518 } 3519 mutex_unlock(&lock); 3520 3521 cma_deref_dev(cma_dev); 3522 wait_for_completion(&cma_dev->comp); 3523 } 3524 3525 static void cma_remove_one(struct ib_device *device) 3526 { 3527 struct cma_device *cma_dev; 3528 3529 cma_dev = ib_get_client_data(device, &cma_client); 3530 if (!cma_dev) 3531 return; 3532 3533 mutex_lock(&lock); 3534 list_del(&cma_dev->list); 3535 mutex_unlock(&lock); 3536 3537 cma_process_remove(cma_dev); 3538 kfree(cma_dev); 3539 } 3540 3541 static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb) 3542 { 3543 struct nlmsghdr *nlh; 3544 struct rdma_cm_id_stats *id_stats; 3545 struct rdma_id_private *id_priv; 3546 struct rdma_cm_id *id = NULL; 3547 struct cma_device *cma_dev; 3548 int i_dev = 0, i_id = 0; 3549 3550 /* 3551 * We export all of the IDs as a sequence of messages. Each 3552 * ID gets its own netlink message. 3553 */ 3554 mutex_lock(&lock); 3555 3556 list_for_each_entry(cma_dev, &dev_list, list) { 3557 if (i_dev < cb->args[0]) { 3558 i_dev++; 3559 continue; 3560 } 3561 3562 i_id = 0; 3563 list_for_each_entry(id_priv, &cma_dev->id_list, list) { 3564 if (i_id < cb->args[1]) { 3565 i_id++; 3566 continue; 3567 } 3568 3569 id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq, 3570 sizeof *id_stats, RDMA_NL_RDMA_CM, 3571 RDMA_NL_RDMA_CM_ID_STATS); 3572 if (!id_stats) 3573 goto out; 3574 3575 memset(id_stats, 0, sizeof *id_stats); 3576 id = &id_priv->id; 3577 id_stats->node_type = id->route.addr.dev_addr.dev_type; 3578 id_stats->port_num = id->port_num; 3579 id_stats->bound_dev_if = 3580 id->route.addr.dev_addr.bound_dev_if; 3581 3582 if (ibnl_put_attr(skb, nlh, 3583 rdma_addr_size(cma_src_addr(id_priv)), 3584 cma_src_addr(id_priv), 3585 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR)) 3586 goto out; 3587 if (ibnl_put_attr(skb, nlh, 3588 rdma_addr_size(cma_src_addr(id_priv)), 3589 cma_dst_addr(id_priv), 3590 RDMA_NL_RDMA_CM_ATTR_DST_ADDR)) 3591 goto out; 3592 3593 id_stats->pid = id_priv->owner; 3594 id_stats->port_space = id->ps; 3595 id_stats->cm_state = id_priv->state; 3596 id_stats->qp_num = id_priv->qp_num; 3597 id_stats->qp_type = id->qp_type; 3598 3599 i_id++; 3600 } 3601 3602 cb->args[1] = 0; 3603 i_dev++; 3604 } 3605 3606 out: 3607 mutex_unlock(&lock); 3608 cb->args[0] = i_dev; 3609 cb->args[1] = i_id; 3610 3611 return skb->len; 3612 } 3613 3614 static const struct ibnl_client_cbs cma_cb_table[] = { 3615 [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats, 3616 .module = THIS_MODULE }, 3617 }; 3618 3619 static int __init cma_init(void) 3620 { 3621 int ret; 3622 3623 cma_wq = create_singlethread_workqueue("rdma_cm"); 3624 if (!cma_wq) 3625 return -ENOMEM; 3626 3627 ib_sa_register_client(&sa_client); 3628 rdma_addr_register_client(&addr_client); 3629 register_netdevice_notifier(&cma_nb); 3630 3631 ret = ib_register_client(&cma_client); 3632 if (ret) 3633 goto err; 3634 3635 if (ibnl_add_client(RDMA_NL_RDMA_CM, RDMA_NL_RDMA_CM_NUM_OPS, cma_cb_table)) 3636 printk(KERN_WARNING "RDMA CMA: failed to add netlink callback\n"); 3637 3638 return 0; 3639 3640 err: 3641 unregister_netdevice_notifier(&cma_nb); 3642 rdma_addr_unregister_client(&addr_client); 3643 ib_sa_unregister_client(&sa_client); 3644 destroy_workqueue(cma_wq); 3645 return ret; 3646 } 3647 3648 static void __exit cma_cleanup(void) 3649 { 3650 ibnl_remove_client(RDMA_NL_RDMA_CM); 3651 ib_unregister_client(&cma_client); 3652 unregister_netdevice_notifier(&cma_nb); 3653 rdma_addr_unregister_client(&addr_client); 3654 ib_sa_unregister_client(&sa_client); 3655 destroy_workqueue(cma_wq); 3656 idr_destroy(&tcp_ps); 3657 idr_destroy(&udp_ps); 3658 idr_destroy(&ipoib_ps); 3659 idr_destroy(&ib_ps); 3660 } 3661 3662 module_init(cma_init); 3663 module_exit(cma_cleanup); 3664