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 struct sockaddr_in *sin; 1389 int ret = 0; 1390 1391 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT)) 1392 return 0; 1393 1394 memset(&event, 0, sizeof event); 1395 switch (iw_event->event) { 1396 case IW_CM_EVENT_CLOSE: 1397 event.event = RDMA_CM_EVENT_DISCONNECTED; 1398 break; 1399 case IW_CM_EVENT_CONNECT_REPLY: 1400 sin = (struct sockaddr_in *) cma_src_addr(id_priv); 1401 *sin = iw_event->local_addr; 1402 sin = (struct sockaddr_in *) cma_dst_addr(id_priv); 1403 *sin = iw_event->remote_addr; 1404 switch (iw_event->status) { 1405 case 0: 1406 event.event = RDMA_CM_EVENT_ESTABLISHED; 1407 event.param.conn.initiator_depth = iw_event->ird; 1408 event.param.conn.responder_resources = iw_event->ord; 1409 break; 1410 case -ECONNRESET: 1411 case -ECONNREFUSED: 1412 event.event = RDMA_CM_EVENT_REJECTED; 1413 break; 1414 case -ETIMEDOUT: 1415 event.event = RDMA_CM_EVENT_UNREACHABLE; 1416 break; 1417 default: 1418 event.event = RDMA_CM_EVENT_CONNECT_ERROR; 1419 break; 1420 } 1421 break; 1422 case IW_CM_EVENT_ESTABLISHED: 1423 event.event = RDMA_CM_EVENT_ESTABLISHED; 1424 event.param.conn.initiator_depth = iw_event->ird; 1425 event.param.conn.responder_resources = iw_event->ord; 1426 break; 1427 default: 1428 BUG_ON(1); 1429 } 1430 1431 event.status = iw_event->status; 1432 event.param.conn.private_data = iw_event->private_data; 1433 event.param.conn.private_data_len = iw_event->private_data_len; 1434 ret = id_priv->id.event_handler(&id_priv->id, &event); 1435 if (ret) { 1436 /* Destroy the CM ID by returning a non-zero value. */ 1437 id_priv->cm_id.iw = NULL; 1438 cma_exch(id_priv, RDMA_CM_DESTROYING); 1439 mutex_unlock(&id_priv->handler_mutex); 1440 rdma_destroy_id(&id_priv->id); 1441 return ret; 1442 } 1443 1444 mutex_unlock(&id_priv->handler_mutex); 1445 return ret; 1446 } 1447 1448 static int iw_conn_req_handler(struct iw_cm_id *cm_id, 1449 struct iw_cm_event *iw_event) 1450 { 1451 struct rdma_cm_id *new_cm_id; 1452 struct rdma_id_private *listen_id, *conn_id; 1453 struct sockaddr_in *sin; 1454 struct net_device *dev = NULL; 1455 struct rdma_cm_event event; 1456 int ret; 1457 struct ib_device_attr attr; 1458 1459 listen_id = cm_id->context; 1460 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN)) 1461 return -ECONNABORTED; 1462 1463 /* Create a new RDMA id for the new IW CM ID */ 1464 new_cm_id = rdma_create_id(listen_id->id.event_handler, 1465 listen_id->id.context, 1466 RDMA_PS_TCP, IB_QPT_RC); 1467 if (IS_ERR(new_cm_id)) { 1468 ret = -ENOMEM; 1469 goto out; 1470 } 1471 conn_id = container_of(new_cm_id, struct rdma_id_private, id); 1472 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING); 1473 conn_id->state = RDMA_CM_CONNECT; 1474 1475 dev = ip_dev_find(&init_net, iw_event->local_addr.sin_addr.s_addr); 1476 if (!dev) { 1477 ret = -EADDRNOTAVAIL; 1478 mutex_unlock(&conn_id->handler_mutex); 1479 rdma_destroy_id(new_cm_id); 1480 goto out; 1481 } 1482 ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL); 1483 if (ret) { 1484 mutex_unlock(&conn_id->handler_mutex); 1485 rdma_destroy_id(new_cm_id); 1486 goto out; 1487 } 1488 1489 ret = cma_acquire_dev(conn_id); 1490 if (ret) { 1491 mutex_unlock(&conn_id->handler_mutex); 1492 rdma_destroy_id(new_cm_id); 1493 goto out; 1494 } 1495 1496 conn_id->cm_id.iw = cm_id; 1497 cm_id->context = conn_id; 1498 cm_id->cm_handler = cma_iw_handler; 1499 1500 sin = (struct sockaddr_in *) cma_src_addr(conn_id); 1501 *sin = iw_event->local_addr; 1502 sin = (struct sockaddr_in *) cma_dst_addr(conn_id); 1503 *sin = iw_event->remote_addr; 1504 1505 ret = ib_query_device(conn_id->id.device, &attr); 1506 if (ret) { 1507 mutex_unlock(&conn_id->handler_mutex); 1508 rdma_destroy_id(new_cm_id); 1509 goto out; 1510 } 1511 1512 memset(&event, 0, sizeof event); 1513 event.event = RDMA_CM_EVENT_CONNECT_REQUEST; 1514 event.param.conn.private_data = iw_event->private_data; 1515 event.param.conn.private_data_len = iw_event->private_data_len; 1516 event.param.conn.initiator_depth = iw_event->ird; 1517 event.param.conn.responder_resources = iw_event->ord; 1518 1519 /* 1520 * Protect against the user destroying conn_id from another thread 1521 * until we're done accessing it. 1522 */ 1523 atomic_inc(&conn_id->refcount); 1524 ret = conn_id->id.event_handler(&conn_id->id, &event); 1525 if (ret) { 1526 /* User wants to destroy the CM ID */ 1527 conn_id->cm_id.iw = NULL; 1528 cma_exch(conn_id, RDMA_CM_DESTROYING); 1529 mutex_unlock(&conn_id->handler_mutex); 1530 cma_deref_id(conn_id); 1531 rdma_destroy_id(&conn_id->id); 1532 goto out; 1533 } 1534 1535 mutex_unlock(&conn_id->handler_mutex); 1536 cma_deref_id(conn_id); 1537 1538 out: 1539 if (dev) 1540 dev_put(dev); 1541 mutex_unlock(&listen_id->handler_mutex); 1542 return ret; 1543 } 1544 1545 static int cma_ib_listen(struct rdma_id_private *id_priv) 1546 { 1547 struct ib_cm_compare_data compare_data; 1548 struct sockaddr *addr; 1549 struct ib_cm_id *id; 1550 __be64 svc_id; 1551 int ret; 1552 1553 id = ib_create_cm_id(id_priv->id.device, cma_req_handler, id_priv); 1554 if (IS_ERR(id)) 1555 return PTR_ERR(id); 1556 1557 id_priv->cm_id.ib = id; 1558 1559 addr = cma_src_addr(id_priv); 1560 svc_id = rdma_get_service_id(&id_priv->id, addr); 1561 if (cma_any_addr(addr) && !id_priv->afonly) 1562 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL); 1563 else { 1564 cma_set_compare_data(id_priv->id.ps, addr, &compare_data); 1565 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data); 1566 } 1567 1568 if (ret) { 1569 ib_destroy_cm_id(id_priv->cm_id.ib); 1570 id_priv->cm_id.ib = NULL; 1571 } 1572 1573 return ret; 1574 } 1575 1576 static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog) 1577 { 1578 int ret; 1579 struct sockaddr_in *sin; 1580 struct iw_cm_id *id; 1581 1582 id = iw_create_cm_id(id_priv->id.device, 1583 iw_conn_req_handler, 1584 id_priv); 1585 if (IS_ERR(id)) 1586 return PTR_ERR(id); 1587 1588 id_priv->cm_id.iw = id; 1589 1590 sin = (struct sockaddr_in *) cma_src_addr(id_priv); 1591 id_priv->cm_id.iw->local_addr = *sin; 1592 1593 ret = iw_cm_listen(id_priv->cm_id.iw, backlog); 1594 1595 if (ret) { 1596 iw_destroy_cm_id(id_priv->cm_id.iw); 1597 id_priv->cm_id.iw = NULL; 1598 } 1599 1600 return ret; 1601 } 1602 1603 static int cma_listen_handler(struct rdma_cm_id *id, 1604 struct rdma_cm_event *event) 1605 { 1606 struct rdma_id_private *id_priv = id->context; 1607 1608 id->context = id_priv->id.context; 1609 id->event_handler = id_priv->id.event_handler; 1610 return id_priv->id.event_handler(id, event); 1611 } 1612 1613 static void cma_listen_on_dev(struct rdma_id_private *id_priv, 1614 struct cma_device *cma_dev) 1615 { 1616 struct rdma_id_private *dev_id_priv; 1617 struct rdma_cm_id *id; 1618 int ret; 1619 1620 if (cma_family(id_priv) == AF_IB && 1621 rdma_node_get_transport(cma_dev->device->node_type) != RDMA_TRANSPORT_IB) 1622 return; 1623 1624 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps, 1625 id_priv->id.qp_type); 1626 if (IS_ERR(id)) 1627 return; 1628 1629 dev_id_priv = container_of(id, struct rdma_id_private, id); 1630 1631 dev_id_priv->state = RDMA_CM_ADDR_BOUND; 1632 memcpy(cma_src_addr(dev_id_priv), cma_src_addr(id_priv), 1633 rdma_addr_size(cma_src_addr(id_priv))); 1634 1635 cma_attach_to_dev(dev_id_priv, cma_dev); 1636 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list); 1637 atomic_inc(&id_priv->refcount); 1638 dev_id_priv->internal_id = 1; 1639 dev_id_priv->afonly = id_priv->afonly; 1640 1641 ret = rdma_listen(id, id_priv->backlog); 1642 if (ret) 1643 printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, " 1644 "listening on device %s\n", ret, cma_dev->device->name); 1645 } 1646 1647 static void cma_listen_on_all(struct rdma_id_private *id_priv) 1648 { 1649 struct cma_device *cma_dev; 1650 1651 mutex_lock(&lock); 1652 list_add_tail(&id_priv->list, &listen_any_list); 1653 list_for_each_entry(cma_dev, &dev_list, list) 1654 cma_listen_on_dev(id_priv, cma_dev); 1655 mutex_unlock(&lock); 1656 } 1657 1658 void rdma_set_service_type(struct rdma_cm_id *id, int tos) 1659 { 1660 struct rdma_id_private *id_priv; 1661 1662 id_priv = container_of(id, struct rdma_id_private, id); 1663 id_priv->tos = (u8) tos; 1664 } 1665 EXPORT_SYMBOL(rdma_set_service_type); 1666 1667 static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec, 1668 void *context) 1669 { 1670 struct cma_work *work = context; 1671 struct rdma_route *route; 1672 1673 route = &work->id->id.route; 1674 1675 if (!status) { 1676 route->num_paths = 1; 1677 *route->path_rec = *path_rec; 1678 } else { 1679 work->old_state = RDMA_CM_ROUTE_QUERY; 1680 work->new_state = RDMA_CM_ADDR_RESOLVED; 1681 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR; 1682 work->event.status = status; 1683 } 1684 1685 queue_work(cma_wq, &work->work); 1686 } 1687 1688 static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms, 1689 struct cma_work *work) 1690 { 1691 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 1692 struct ib_sa_path_rec path_rec; 1693 ib_sa_comp_mask comp_mask; 1694 struct sockaddr_in6 *sin6; 1695 struct sockaddr_ib *sib; 1696 1697 memset(&path_rec, 0, sizeof path_rec); 1698 rdma_addr_get_sgid(dev_addr, &path_rec.sgid); 1699 rdma_addr_get_dgid(dev_addr, &path_rec.dgid); 1700 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); 1701 path_rec.numb_path = 1; 1702 path_rec.reversible = 1; 1703 path_rec.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv)); 1704 1705 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID | 1706 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH | 1707 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID; 1708 1709 switch (cma_family(id_priv)) { 1710 case AF_INET: 1711 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos); 1712 comp_mask |= IB_SA_PATH_REC_QOS_CLASS; 1713 break; 1714 case AF_INET6: 1715 sin6 = (struct sockaddr_in6 *) cma_src_addr(id_priv); 1716 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20); 1717 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS; 1718 break; 1719 case AF_IB: 1720 sib = (struct sockaddr_ib *) cma_src_addr(id_priv); 1721 path_rec.traffic_class = (u8) (be32_to_cpu(sib->sib_flowinfo) >> 20); 1722 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS; 1723 break; 1724 } 1725 1726 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device, 1727 id_priv->id.port_num, &path_rec, 1728 comp_mask, timeout_ms, 1729 GFP_KERNEL, cma_query_handler, 1730 work, &id_priv->query); 1731 1732 return (id_priv->query_id < 0) ? id_priv->query_id : 0; 1733 } 1734 1735 static void cma_work_handler(struct work_struct *_work) 1736 { 1737 struct cma_work *work = container_of(_work, struct cma_work, work); 1738 struct rdma_id_private *id_priv = work->id; 1739 int destroy = 0; 1740 1741 mutex_lock(&id_priv->handler_mutex); 1742 if (!cma_comp_exch(id_priv, work->old_state, work->new_state)) 1743 goto out; 1744 1745 if (id_priv->id.event_handler(&id_priv->id, &work->event)) { 1746 cma_exch(id_priv, RDMA_CM_DESTROYING); 1747 destroy = 1; 1748 } 1749 out: 1750 mutex_unlock(&id_priv->handler_mutex); 1751 cma_deref_id(id_priv); 1752 if (destroy) 1753 rdma_destroy_id(&id_priv->id); 1754 kfree(work); 1755 } 1756 1757 static void cma_ndev_work_handler(struct work_struct *_work) 1758 { 1759 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work); 1760 struct rdma_id_private *id_priv = work->id; 1761 int destroy = 0; 1762 1763 mutex_lock(&id_priv->handler_mutex); 1764 if (id_priv->state == RDMA_CM_DESTROYING || 1765 id_priv->state == RDMA_CM_DEVICE_REMOVAL) 1766 goto out; 1767 1768 if (id_priv->id.event_handler(&id_priv->id, &work->event)) { 1769 cma_exch(id_priv, RDMA_CM_DESTROYING); 1770 destroy = 1; 1771 } 1772 1773 out: 1774 mutex_unlock(&id_priv->handler_mutex); 1775 cma_deref_id(id_priv); 1776 if (destroy) 1777 rdma_destroy_id(&id_priv->id); 1778 kfree(work); 1779 } 1780 1781 static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms) 1782 { 1783 struct rdma_route *route = &id_priv->id.route; 1784 struct cma_work *work; 1785 int ret; 1786 1787 work = kzalloc(sizeof *work, GFP_KERNEL); 1788 if (!work) 1789 return -ENOMEM; 1790 1791 work->id = id_priv; 1792 INIT_WORK(&work->work, cma_work_handler); 1793 work->old_state = RDMA_CM_ROUTE_QUERY; 1794 work->new_state = RDMA_CM_ROUTE_RESOLVED; 1795 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 1796 1797 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL); 1798 if (!route->path_rec) { 1799 ret = -ENOMEM; 1800 goto err1; 1801 } 1802 1803 ret = cma_query_ib_route(id_priv, timeout_ms, work); 1804 if (ret) 1805 goto err2; 1806 1807 return 0; 1808 err2: 1809 kfree(route->path_rec); 1810 route->path_rec = NULL; 1811 err1: 1812 kfree(work); 1813 return ret; 1814 } 1815 1816 int rdma_set_ib_paths(struct rdma_cm_id *id, 1817 struct ib_sa_path_rec *path_rec, int num_paths) 1818 { 1819 struct rdma_id_private *id_priv; 1820 int ret; 1821 1822 id_priv = container_of(id, struct rdma_id_private, id); 1823 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, 1824 RDMA_CM_ROUTE_RESOLVED)) 1825 return -EINVAL; 1826 1827 id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths, 1828 GFP_KERNEL); 1829 if (!id->route.path_rec) { 1830 ret = -ENOMEM; 1831 goto err; 1832 } 1833 1834 id->route.num_paths = num_paths; 1835 return 0; 1836 err: 1837 cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED); 1838 return ret; 1839 } 1840 EXPORT_SYMBOL(rdma_set_ib_paths); 1841 1842 static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms) 1843 { 1844 struct cma_work *work; 1845 1846 work = kzalloc(sizeof *work, GFP_KERNEL); 1847 if (!work) 1848 return -ENOMEM; 1849 1850 work->id = id_priv; 1851 INIT_WORK(&work->work, cma_work_handler); 1852 work->old_state = RDMA_CM_ROUTE_QUERY; 1853 work->new_state = RDMA_CM_ROUTE_RESOLVED; 1854 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 1855 queue_work(cma_wq, &work->work); 1856 return 0; 1857 } 1858 1859 static int cma_resolve_iboe_route(struct rdma_id_private *id_priv) 1860 { 1861 struct rdma_route *route = &id_priv->id.route; 1862 struct rdma_addr *addr = &route->addr; 1863 struct cma_work *work; 1864 int ret; 1865 struct net_device *ndev = NULL; 1866 u16 vid; 1867 1868 work = kzalloc(sizeof *work, GFP_KERNEL); 1869 if (!work) 1870 return -ENOMEM; 1871 1872 work->id = id_priv; 1873 INIT_WORK(&work->work, cma_work_handler); 1874 1875 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL); 1876 if (!route->path_rec) { 1877 ret = -ENOMEM; 1878 goto err1; 1879 } 1880 1881 route->num_paths = 1; 1882 1883 if (addr->dev_addr.bound_dev_if) 1884 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if); 1885 if (!ndev) { 1886 ret = -ENODEV; 1887 goto err2; 1888 } 1889 1890 vid = rdma_vlan_dev_vlan_id(ndev); 1891 1892 iboe_mac_vlan_to_ll(&route->path_rec->sgid, addr->dev_addr.src_dev_addr, vid); 1893 iboe_mac_vlan_to_ll(&route->path_rec->dgid, addr->dev_addr.dst_dev_addr, vid); 1894 1895 route->path_rec->hop_limit = 1; 1896 route->path_rec->reversible = 1; 1897 route->path_rec->pkey = cpu_to_be16(0xffff); 1898 route->path_rec->mtu_selector = IB_SA_EQ; 1899 route->path_rec->sl = netdev_get_prio_tc_map( 1900 ndev->priv_flags & IFF_802_1Q_VLAN ? 1901 vlan_dev_real_dev(ndev) : ndev, 1902 rt_tos2priority(id_priv->tos)); 1903 1904 route->path_rec->mtu = iboe_get_mtu(ndev->mtu); 1905 route->path_rec->rate_selector = IB_SA_EQ; 1906 route->path_rec->rate = iboe_get_rate(ndev); 1907 dev_put(ndev); 1908 route->path_rec->packet_life_time_selector = IB_SA_EQ; 1909 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME; 1910 if (!route->path_rec->mtu) { 1911 ret = -EINVAL; 1912 goto err2; 1913 } 1914 1915 work->old_state = RDMA_CM_ROUTE_QUERY; 1916 work->new_state = RDMA_CM_ROUTE_RESOLVED; 1917 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 1918 work->event.status = 0; 1919 1920 queue_work(cma_wq, &work->work); 1921 1922 return 0; 1923 1924 err2: 1925 kfree(route->path_rec); 1926 route->path_rec = NULL; 1927 err1: 1928 kfree(work); 1929 return ret; 1930 } 1931 1932 int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms) 1933 { 1934 struct rdma_id_private *id_priv; 1935 int ret; 1936 1937 id_priv = container_of(id, struct rdma_id_private, id); 1938 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY)) 1939 return -EINVAL; 1940 1941 atomic_inc(&id_priv->refcount); 1942 switch (rdma_node_get_transport(id->device->node_type)) { 1943 case RDMA_TRANSPORT_IB: 1944 switch (rdma_port_get_link_layer(id->device, id->port_num)) { 1945 case IB_LINK_LAYER_INFINIBAND: 1946 ret = cma_resolve_ib_route(id_priv, timeout_ms); 1947 break; 1948 case IB_LINK_LAYER_ETHERNET: 1949 ret = cma_resolve_iboe_route(id_priv); 1950 break; 1951 default: 1952 ret = -ENOSYS; 1953 } 1954 break; 1955 case RDMA_TRANSPORT_IWARP: 1956 ret = cma_resolve_iw_route(id_priv, timeout_ms); 1957 break; 1958 default: 1959 ret = -ENOSYS; 1960 break; 1961 } 1962 if (ret) 1963 goto err; 1964 1965 return 0; 1966 err: 1967 cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED); 1968 cma_deref_id(id_priv); 1969 return ret; 1970 } 1971 EXPORT_SYMBOL(rdma_resolve_route); 1972 1973 static void cma_set_loopback(struct sockaddr *addr) 1974 { 1975 switch (addr->sa_family) { 1976 case AF_INET: 1977 ((struct sockaddr_in *) addr)->sin_addr.s_addr = htonl(INADDR_LOOPBACK); 1978 break; 1979 case AF_INET6: 1980 ipv6_addr_set(&((struct sockaddr_in6 *) addr)->sin6_addr, 1981 0, 0, 0, htonl(1)); 1982 break; 1983 default: 1984 ib_addr_set(&((struct sockaddr_ib *) addr)->sib_addr, 1985 0, 0, 0, htonl(1)); 1986 break; 1987 } 1988 } 1989 1990 static int cma_bind_loopback(struct rdma_id_private *id_priv) 1991 { 1992 struct cma_device *cma_dev, *cur_dev; 1993 struct ib_port_attr port_attr; 1994 union ib_gid gid; 1995 u16 pkey; 1996 int ret; 1997 u8 p; 1998 1999 cma_dev = NULL; 2000 mutex_lock(&lock); 2001 list_for_each_entry(cur_dev, &dev_list, list) { 2002 if (cma_family(id_priv) == AF_IB && 2003 rdma_node_get_transport(cur_dev->device->node_type) != RDMA_TRANSPORT_IB) 2004 continue; 2005 2006 if (!cma_dev) 2007 cma_dev = cur_dev; 2008 2009 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) { 2010 if (!ib_query_port(cur_dev->device, p, &port_attr) && 2011 port_attr.state == IB_PORT_ACTIVE) { 2012 cma_dev = cur_dev; 2013 goto port_found; 2014 } 2015 } 2016 } 2017 2018 if (!cma_dev) { 2019 ret = -ENODEV; 2020 goto out; 2021 } 2022 2023 p = 1; 2024 2025 port_found: 2026 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid); 2027 if (ret) 2028 goto out; 2029 2030 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey); 2031 if (ret) 2032 goto out; 2033 2034 id_priv->id.route.addr.dev_addr.dev_type = 2035 (rdma_port_get_link_layer(cma_dev->device, p) == IB_LINK_LAYER_INFINIBAND) ? 2036 ARPHRD_INFINIBAND : ARPHRD_ETHER; 2037 2038 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid); 2039 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey); 2040 id_priv->id.port_num = p; 2041 cma_attach_to_dev(id_priv, cma_dev); 2042 cma_set_loopback(cma_src_addr(id_priv)); 2043 out: 2044 mutex_unlock(&lock); 2045 return ret; 2046 } 2047 2048 static void addr_handler(int status, struct sockaddr *src_addr, 2049 struct rdma_dev_addr *dev_addr, void *context) 2050 { 2051 struct rdma_id_private *id_priv = context; 2052 struct rdma_cm_event event; 2053 2054 memset(&event, 0, sizeof event); 2055 mutex_lock(&id_priv->handler_mutex); 2056 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, 2057 RDMA_CM_ADDR_RESOLVED)) 2058 goto out; 2059 2060 if (!status && !id_priv->cma_dev) 2061 status = cma_acquire_dev(id_priv); 2062 2063 if (status) { 2064 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, 2065 RDMA_CM_ADDR_BOUND)) 2066 goto out; 2067 event.event = RDMA_CM_EVENT_ADDR_ERROR; 2068 event.status = status; 2069 } else { 2070 memcpy(cma_src_addr(id_priv), src_addr, rdma_addr_size(src_addr)); 2071 event.event = RDMA_CM_EVENT_ADDR_RESOLVED; 2072 } 2073 2074 if (id_priv->id.event_handler(&id_priv->id, &event)) { 2075 cma_exch(id_priv, RDMA_CM_DESTROYING); 2076 mutex_unlock(&id_priv->handler_mutex); 2077 cma_deref_id(id_priv); 2078 rdma_destroy_id(&id_priv->id); 2079 return; 2080 } 2081 out: 2082 mutex_unlock(&id_priv->handler_mutex); 2083 cma_deref_id(id_priv); 2084 } 2085 2086 static int cma_resolve_loopback(struct rdma_id_private *id_priv) 2087 { 2088 struct cma_work *work; 2089 union ib_gid gid; 2090 int ret; 2091 2092 work = kzalloc(sizeof *work, GFP_KERNEL); 2093 if (!work) 2094 return -ENOMEM; 2095 2096 if (!id_priv->cma_dev) { 2097 ret = cma_bind_loopback(id_priv); 2098 if (ret) 2099 goto err; 2100 } 2101 2102 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid); 2103 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid); 2104 2105 work->id = id_priv; 2106 INIT_WORK(&work->work, cma_work_handler); 2107 work->old_state = RDMA_CM_ADDR_QUERY; 2108 work->new_state = RDMA_CM_ADDR_RESOLVED; 2109 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED; 2110 queue_work(cma_wq, &work->work); 2111 return 0; 2112 err: 2113 kfree(work); 2114 return ret; 2115 } 2116 2117 static int cma_resolve_ib_addr(struct rdma_id_private *id_priv) 2118 { 2119 struct cma_work *work; 2120 int ret; 2121 2122 work = kzalloc(sizeof *work, GFP_KERNEL); 2123 if (!work) 2124 return -ENOMEM; 2125 2126 if (!id_priv->cma_dev) { 2127 ret = cma_resolve_ib_dev(id_priv); 2128 if (ret) 2129 goto err; 2130 } 2131 2132 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, (union ib_gid *) 2133 &(((struct sockaddr_ib *) &id_priv->id.route.addr.dst_addr)->sib_addr)); 2134 2135 work->id = id_priv; 2136 INIT_WORK(&work->work, cma_work_handler); 2137 work->old_state = RDMA_CM_ADDR_QUERY; 2138 work->new_state = RDMA_CM_ADDR_RESOLVED; 2139 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED; 2140 queue_work(cma_wq, &work->work); 2141 return 0; 2142 err: 2143 kfree(work); 2144 return ret; 2145 } 2146 2147 static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, 2148 struct sockaddr *dst_addr) 2149 { 2150 if (!src_addr || !src_addr->sa_family) { 2151 src_addr = (struct sockaddr *) &id->route.addr.src_addr; 2152 src_addr->sa_family = dst_addr->sa_family; 2153 if (dst_addr->sa_family == AF_INET6) { 2154 ((struct sockaddr_in6 *) src_addr)->sin6_scope_id = 2155 ((struct sockaddr_in6 *) dst_addr)->sin6_scope_id; 2156 } else if (dst_addr->sa_family == AF_IB) { 2157 ((struct sockaddr_ib *) src_addr)->sib_pkey = 2158 ((struct sockaddr_ib *) dst_addr)->sib_pkey; 2159 } 2160 } 2161 return rdma_bind_addr(id, src_addr); 2162 } 2163 2164 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, 2165 struct sockaddr *dst_addr, int timeout_ms) 2166 { 2167 struct rdma_id_private *id_priv; 2168 int ret; 2169 2170 id_priv = container_of(id, struct rdma_id_private, id); 2171 if (id_priv->state == RDMA_CM_IDLE) { 2172 ret = cma_bind_addr(id, src_addr, dst_addr); 2173 if (ret) 2174 return ret; 2175 } 2176 2177 if (cma_family(id_priv) != dst_addr->sa_family) 2178 return -EINVAL; 2179 2180 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY)) 2181 return -EINVAL; 2182 2183 atomic_inc(&id_priv->refcount); 2184 memcpy(cma_dst_addr(id_priv), dst_addr, rdma_addr_size(dst_addr)); 2185 if (cma_any_addr(dst_addr)) { 2186 ret = cma_resolve_loopback(id_priv); 2187 } else { 2188 if (dst_addr->sa_family == AF_IB) { 2189 ret = cma_resolve_ib_addr(id_priv); 2190 } else { 2191 ret = rdma_resolve_ip(&addr_client, cma_src_addr(id_priv), 2192 dst_addr, &id->route.addr.dev_addr, 2193 timeout_ms, addr_handler, id_priv); 2194 } 2195 } 2196 if (ret) 2197 goto err; 2198 2199 return 0; 2200 err: 2201 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND); 2202 cma_deref_id(id_priv); 2203 return ret; 2204 } 2205 EXPORT_SYMBOL(rdma_resolve_addr); 2206 2207 int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse) 2208 { 2209 struct rdma_id_private *id_priv; 2210 unsigned long flags; 2211 int ret; 2212 2213 id_priv = container_of(id, struct rdma_id_private, id); 2214 spin_lock_irqsave(&id_priv->lock, flags); 2215 if (reuse || id_priv->state == RDMA_CM_IDLE) { 2216 id_priv->reuseaddr = reuse; 2217 ret = 0; 2218 } else { 2219 ret = -EINVAL; 2220 } 2221 spin_unlock_irqrestore(&id_priv->lock, flags); 2222 return ret; 2223 } 2224 EXPORT_SYMBOL(rdma_set_reuseaddr); 2225 2226 int rdma_set_afonly(struct rdma_cm_id *id, int afonly) 2227 { 2228 struct rdma_id_private *id_priv; 2229 unsigned long flags; 2230 int ret; 2231 2232 id_priv = container_of(id, struct rdma_id_private, id); 2233 spin_lock_irqsave(&id_priv->lock, flags); 2234 if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) { 2235 id_priv->options |= (1 << CMA_OPTION_AFONLY); 2236 id_priv->afonly = afonly; 2237 ret = 0; 2238 } else { 2239 ret = -EINVAL; 2240 } 2241 spin_unlock_irqrestore(&id_priv->lock, flags); 2242 return ret; 2243 } 2244 EXPORT_SYMBOL(rdma_set_afonly); 2245 2246 static void cma_bind_port(struct rdma_bind_list *bind_list, 2247 struct rdma_id_private *id_priv) 2248 { 2249 struct sockaddr *addr; 2250 struct sockaddr_ib *sib; 2251 u64 sid, mask; 2252 __be16 port; 2253 2254 addr = cma_src_addr(id_priv); 2255 port = htons(bind_list->port); 2256 2257 switch (addr->sa_family) { 2258 case AF_INET: 2259 ((struct sockaddr_in *) addr)->sin_port = port; 2260 break; 2261 case AF_INET6: 2262 ((struct sockaddr_in6 *) addr)->sin6_port = port; 2263 break; 2264 case AF_IB: 2265 sib = (struct sockaddr_ib *) addr; 2266 sid = be64_to_cpu(sib->sib_sid); 2267 mask = be64_to_cpu(sib->sib_sid_mask); 2268 sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port)); 2269 sib->sib_sid_mask = cpu_to_be64(~0ULL); 2270 break; 2271 } 2272 id_priv->bind_list = bind_list; 2273 hlist_add_head(&id_priv->node, &bind_list->owners); 2274 } 2275 2276 static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv, 2277 unsigned short snum) 2278 { 2279 struct rdma_bind_list *bind_list; 2280 int ret; 2281 2282 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL); 2283 if (!bind_list) 2284 return -ENOMEM; 2285 2286 ret = idr_alloc(ps, bind_list, snum, snum + 1, GFP_KERNEL); 2287 if (ret < 0) 2288 goto err; 2289 2290 bind_list->ps = ps; 2291 bind_list->port = (unsigned short)ret; 2292 cma_bind_port(bind_list, id_priv); 2293 return 0; 2294 err: 2295 kfree(bind_list); 2296 return ret == -ENOSPC ? -EADDRNOTAVAIL : ret; 2297 } 2298 2299 static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv) 2300 { 2301 static unsigned int last_used_port; 2302 int low, high, remaining; 2303 unsigned int rover; 2304 2305 inet_get_local_port_range(&low, &high); 2306 remaining = (high - low) + 1; 2307 rover = net_random() % remaining + low; 2308 retry: 2309 if (last_used_port != rover && 2310 !idr_find(ps, (unsigned short) rover)) { 2311 int ret = cma_alloc_port(ps, id_priv, rover); 2312 /* 2313 * Remember previously used port number in order to avoid 2314 * re-using same port immediately after it is closed. 2315 */ 2316 if (!ret) 2317 last_used_port = rover; 2318 if (ret != -EADDRNOTAVAIL) 2319 return ret; 2320 } 2321 if (--remaining) { 2322 rover++; 2323 if ((rover < low) || (rover > high)) 2324 rover = low; 2325 goto retry; 2326 } 2327 return -EADDRNOTAVAIL; 2328 } 2329 2330 /* 2331 * Check that the requested port is available. This is called when trying to 2332 * bind to a specific port, or when trying to listen on a bound port. In 2333 * the latter case, the provided id_priv may already be on the bind_list, but 2334 * we still need to check that it's okay to start listening. 2335 */ 2336 static int cma_check_port(struct rdma_bind_list *bind_list, 2337 struct rdma_id_private *id_priv, uint8_t reuseaddr) 2338 { 2339 struct rdma_id_private *cur_id; 2340 struct sockaddr *addr, *cur_addr; 2341 2342 addr = cma_src_addr(id_priv); 2343 hlist_for_each_entry(cur_id, &bind_list->owners, node) { 2344 if (id_priv == cur_id) 2345 continue; 2346 2347 if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr && 2348 cur_id->reuseaddr) 2349 continue; 2350 2351 cur_addr = cma_src_addr(cur_id); 2352 if (id_priv->afonly && cur_id->afonly && 2353 (addr->sa_family != cur_addr->sa_family)) 2354 continue; 2355 2356 if (cma_any_addr(addr) || cma_any_addr(cur_addr)) 2357 return -EADDRNOTAVAIL; 2358 2359 if (!cma_addr_cmp(addr, cur_addr)) 2360 return -EADDRINUSE; 2361 } 2362 return 0; 2363 } 2364 2365 static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv) 2366 { 2367 struct rdma_bind_list *bind_list; 2368 unsigned short snum; 2369 int ret; 2370 2371 snum = ntohs(cma_port(cma_src_addr(id_priv))); 2372 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE)) 2373 return -EACCES; 2374 2375 bind_list = idr_find(ps, snum); 2376 if (!bind_list) { 2377 ret = cma_alloc_port(ps, id_priv, snum); 2378 } else { 2379 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr); 2380 if (!ret) 2381 cma_bind_port(bind_list, id_priv); 2382 } 2383 return ret; 2384 } 2385 2386 static int cma_bind_listen(struct rdma_id_private *id_priv) 2387 { 2388 struct rdma_bind_list *bind_list = id_priv->bind_list; 2389 int ret = 0; 2390 2391 mutex_lock(&lock); 2392 if (bind_list->owners.first->next) 2393 ret = cma_check_port(bind_list, id_priv, 0); 2394 mutex_unlock(&lock); 2395 return ret; 2396 } 2397 2398 static struct idr *cma_select_inet_ps(struct rdma_id_private *id_priv) 2399 { 2400 switch (id_priv->id.ps) { 2401 case RDMA_PS_TCP: 2402 return &tcp_ps; 2403 case RDMA_PS_UDP: 2404 return &udp_ps; 2405 case RDMA_PS_IPOIB: 2406 return &ipoib_ps; 2407 case RDMA_PS_IB: 2408 return &ib_ps; 2409 default: 2410 return NULL; 2411 } 2412 } 2413 2414 static struct idr *cma_select_ib_ps(struct rdma_id_private *id_priv) 2415 { 2416 struct idr *ps = NULL; 2417 struct sockaddr_ib *sib; 2418 u64 sid_ps, mask, sid; 2419 2420 sib = (struct sockaddr_ib *) cma_src_addr(id_priv); 2421 mask = be64_to_cpu(sib->sib_sid_mask) & RDMA_IB_IP_PS_MASK; 2422 sid = be64_to_cpu(sib->sib_sid) & mask; 2423 2424 if ((id_priv->id.ps == RDMA_PS_IB) && (sid == (RDMA_IB_IP_PS_IB & mask))) { 2425 sid_ps = RDMA_IB_IP_PS_IB; 2426 ps = &ib_ps; 2427 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_TCP)) && 2428 (sid == (RDMA_IB_IP_PS_TCP & mask))) { 2429 sid_ps = RDMA_IB_IP_PS_TCP; 2430 ps = &tcp_ps; 2431 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_UDP)) && 2432 (sid == (RDMA_IB_IP_PS_UDP & mask))) { 2433 sid_ps = RDMA_IB_IP_PS_UDP; 2434 ps = &udp_ps; 2435 } 2436 2437 if (ps) { 2438 sib->sib_sid = cpu_to_be64(sid_ps | ntohs(cma_port((struct sockaddr *) sib))); 2439 sib->sib_sid_mask = cpu_to_be64(RDMA_IB_IP_PS_MASK | 2440 be64_to_cpu(sib->sib_sid_mask)); 2441 } 2442 return ps; 2443 } 2444 2445 static int cma_get_port(struct rdma_id_private *id_priv) 2446 { 2447 struct idr *ps; 2448 int ret; 2449 2450 if (cma_family(id_priv) != AF_IB) 2451 ps = cma_select_inet_ps(id_priv); 2452 else 2453 ps = cma_select_ib_ps(id_priv); 2454 if (!ps) 2455 return -EPROTONOSUPPORT; 2456 2457 mutex_lock(&lock); 2458 if (cma_any_port(cma_src_addr(id_priv))) 2459 ret = cma_alloc_any_port(ps, id_priv); 2460 else 2461 ret = cma_use_port(ps, id_priv); 2462 mutex_unlock(&lock); 2463 2464 return ret; 2465 } 2466 2467 static int cma_check_linklocal(struct rdma_dev_addr *dev_addr, 2468 struct sockaddr *addr) 2469 { 2470 #if IS_ENABLED(CONFIG_IPV6) 2471 struct sockaddr_in6 *sin6; 2472 2473 if (addr->sa_family != AF_INET6) 2474 return 0; 2475 2476 sin6 = (struct sockaddr_in6 *) addr; 2477 if ((ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) && 2478 !sin6->sin6_scope_id) 2479 return -EINVAL; 2480 2481 dev_addr->bound_dev_if = sin6->sin6_scope_id; 2482 #endif 2483 return 0; 2484 } 2485 2486 int rdma_listen(struct rdma_cm_id *id, int backlog) 2487 { 2488 struct rdma_id_private *id_priv; 2489 int ret; 2490 2491 id_priv = container_of(id, struct rdma_id_private, id); 2492 if (id_priv->state == RDMA_CM_IDLE) { 2493 id->route.addr.src_addr.ss_family = AF_INET; 2494 ret = rdma_bind_addr(id, cma_src_addr(id_priv)); 2495 if (ret) 2496 return ret; 2497 } 2498 2499 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN)) 2500 return -EINVAL; 2501 2502 if (id_priv->reuseaddr) { 2503 ret = cma_bind_listen(id_priv); 2504 if (ret) 2505 goto err; 2506 } 2507 2508 id_priv->backlog = backlog; 2509 if (id->device) { 2510 switch (rdma_node_get_transport(id->device->node_type)) { 2511 case RDMA_TRANSPORT_IB: 2512 ret = cma_ib_listen(id_priv); 2513 if (ret) 2514 goto err; 2515 break; 2516 case RDMA_TRANSPORT_IWARP: 2517 ret = cma_iw_listen(id_priv, backlog); 2518 if (ret) 2519 goto err; 2520 break; 2521 default: 2522 ret = -ENOSYS; 2523 goto err; 2524 } 2525 } else 2526 cma_listen_on_all(id_priv); 2527 2528 return 0; 2529 err: 2530 id_priv->backlog = 0; 2531 cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND); 2532 return ret; 2533 } 2534 EXPORT_SYMBOL(rdma_listen); 2535 2536 int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr) 2537 { 2538 struct rdma_id_private *id_priv; 2539 int ret; 2540 2541 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6 && 2542 addr->sa_family != AF_IB) 2543 return -EAFNOSUPPORT; 2544 2545 id_priv = container_of(id, struct rdma_id_private, id); 2546 if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND)) 2547 return -EINVAL; 2548 2549 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr); 2550 if (ret) 2551 goto err1; 2552 2553 if (!cma_any_addr(addr)) { 2554 ret = cma_translate_addr(addr, &id->route.addr.dev_addr); 2555 if (ret) 2556 goto err1; 2557 2558 ret = cma_acquire_dev(id_priv); 2559 if (ret) 2560 goto err1; 2561 } 2562 2563 memcpy(cma_src_addr(id_priv), addr, rdma_addr_size(addr)); 2564 if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) { 2565 if (addr->sa_family == AF_INET) 2566 id_priv->afonly = 1; 2567 #if IS_ENABLED(CONFIG_IPV6) 2568 else if (addr->sa_family == AF_INET6) 2569 id_priv->afonly = init_net.ipv6.sysctl.bindv6only; 2570 #endif 2571 } 2572 ret = cma_get_port(id_priv); 2573 if (ret) 2574 goto err2; 2575 2576 return 0; 2577 err2: 2578 if (id_priv->cma_dev) 2579 cma_release_dev(id_priv); 2580 err1: 2581 cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE); 2582 return ret; 2583 } 2584 EXPORT_SYMBOL(rdma_bind_addr); 2585 2586 static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv) 2587 { 2588 struct cma_hdr *cma_hdr; 2589 2590 cma_hdr = hdr; 2591 cma_hdr->cma_version = CMA_VERSION; 2592 if (cma_family(id_priv) == AF_INET) { 2593 struct sockaddr_in *src4, *dst4; 2594 2595 src4 = (struct sockaddr_in *) cma_src_addr(id_priv); 2596 dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv); 2597 2598 cma_set_ip_ver(cma_hdr, 4); 2599 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; 2600 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; 2601 cma_hdr->port = src4->sin_port; 2602 } else if (cma_family(id_priv) == AF_INET6) { 2603 struct sockaddr_in6 *src6, *dst6; 2604 2605 src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv); 2606 dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv); 2607 2608 cma_set_ip_ver(cma_hdr, 6); 2609 cma_hdr->src_addr.ip6 = src6->sin6_addr; 2610 cma_hdr->dst_addr.ip6 = dst6->sin6_addr; 2611 cma_hdr->port = src6->sin6_port; 2612 } 2613 return 0; 2614 } 2615 2616 static int cma_sidr_rep_handler(struct ib_cm_id *cm_id, 2617 struct ib_cm_event *ib_event) 2618 { 2619 struct rdma_id_private *id_priv = cm_id->context; 2620 struct rdma_cm_event event; 2621 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd; 2622 int ret = 0; 2623 2624 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT)) 2625 return 0; 2626 2627 memset(&event, 0, sizeof event); 2628 switch (ib_event->event) { 2629 case IB_CM_SIDR_REQ_ERROR: 2630 event.event = RDMA_CM_EVENT_UNREACHABLE; 2631 event.status = -ETIMEDOUT; 2632 break; 2633 case IB_CM_SIDR_REP_RECEIVED: 2634 event.param.ud.private_data = ib_event->private_data; 2635 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE; 2636 if (rep->status != IB_SIDR_SUCCESS) { 2637 event.event = RDMA_CM_EVENT_UNREACHABLE; 2638 event.status = ib_event->param.sidr_rep_rcvd.status; 2639 break; 2640 } 2641 ret = cma_set_qkey(id_priv, rep->qkey); 2642 if (ret) { 2643 event.event = RDMA_CM_EVENT_ADDR_ERROR; 2644 event.status = ret; 2645 break; 2646 } 2647 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num, 2648 id_priv->id.route.path_rec, 2649 &event.param.ud.ah_attr); 2650 event.param.ud.qp_num = rep->qpn; 2651 event.param.ud.qkey = rep->qkey; 2652 event.event = RDMA_CM_EVENT_ESTABLISHED; 2653 event.status = 0; 2654 break; 2655 default: 2656 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n", 2657 ib_event->event); 2658 goto out; 2659 } 2660 2661 ret = id_priv->id.event_handler(&id_priv->id, &event); 2662 if (ret) { 2663 /* Destroy the CM ID by returning a non-zero value. */ 2664 id_priv->cm_id.ib = NULL; 2665 cma_exch(id_priv, RDMA_CM_DESTROYING); 2666 mutex_unlock(&id_priv->handler_mutex); 2667 rdma_destroy_id(&id_priv->id); 2668 return ret; 2669 } 2670 out: 2671 mutex_unlock(&id_priv->handler_mutex); 2672 return ret; 2673 } 2674 2675 static int cma_resolve_ib_udp(struct rdma_id_private *id_priv, 2676 struct rdma_conn_param *conn_param) 2677 { 2678 struct ib_cm_sidr_req_param req; 2679 struct ib_cm_id *id; 2680 void *private_data; 2681 int offset, ret; 2682 2683 memset(&req, 0, sizeof req); 2684 offset = cma_user_data_offset(id_priv); 2685 req.private_data_len = offset + conn_param->private_data_len; 2686 if (req.private_data_len < conn_param->private_data_len) 2687 return -EINVAL; 2688 2689 if (req.private_data_len) { 2690 private_data = kzalloc(req.private_data_len, GFP_ATOMIC); 2691 if (!private_data) 2692 return -ENOMEM; 2693 } else { 2694 private_data = NULL; 2695 } 2696 2697 if (conn_param->private_data && conn_param->private_data_len) 2698 memcpy(private_data + offset, conn_param->private_data, 2699 conn_param->private_data_len); 2700 2701 if (private_data) { 2702 ret = cma_format_hdr(private_data, id_priv); 2703 if (ret) 2704 goto out; 2705 req.private_data = private_data; 2706 } 2707 2708 id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler, 2709 id_priv); 2710 if (IS_ERR(id)) { 2711 ret = PTR_ERR(id); 2712 goto out; 2713 } 2714 id_priv->cm_id.ib = id; 2715 2716 req.path = id_priv->id.route.path_rec; 2717 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv)); 2718 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8); 2719 req.max_cm_retries = CMA_MAX_CM_RETRIES; 2720 2721 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req); 2722 if (ret) { 2723 ib_destroy_cm_id(id_priv->cm_id.ib); 2724 id_priv->cm_id.ib = NULL; 2725 } 2726 out: 2727 kfree(private_data); 2728 return ret; 2729 } 2730 2731 static int cma_connect_ib(struct rdma_id_private *id_priv, 2732 struct rdma_conn_param *conn_param) 2733 { 2734 struct ib_cm_req_param req; 2735 struct rdma_route *route; 2736 void *private_data; 2737 struct ib_cm_id *id; 2738 int offset, ret; 2739 2740 memset(&req, 0, sizeof req); 2741 offset = cma_user_data_offset(id_priv); 2742 req.private_data_len = offset + conn_param->private_data_len; 2743 if (req.private_data_len < conn_param->private_data_len) 2744 return -EINVAL; 2745 2746 if (req.private_data_len) { 2747 private_data = kzalloc(req.private_data_len, GFP_ATOMIC); 2748 if (!private_data) 2749 return -ENOMEM; 2750 } else { 2751 private_data = NULL; 2752 } 2753 2754 if (conn_param->private_data && conn_param->private_data_len) 2755 memcpy(private_data + offset, conn_param->private_data, 2756 conn_param->private_data_len); 2757 2758 id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv); 2759 if (IS_ERR(id)) { 2760 ret = PTR_ERR(id); 2761 goto out; 2762 } 2763 id_priv->cm_id.ib = id; 2764 2765 route = &id_priv->id.route; 2766 if (private_data) { 2767 ret = cma_format_hdr(private_data, id_priv); 2768 if (ret) 2769 goto out; 2770 req.private_data = private_data; 2771 } 2772 2773 req.primary_path = &route->path_rec[0]; 2774 if (route->num_paths == 2) 2775 req.alternate_path = &route->path_rec[1]; 2776 2777 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv)); 2778 req.qp_num = id_priv->qp_num; 2779 req.qp_type = id_priv->id.qp_type; 2780 req.starting_psn = id_priv->seq_num; 2781 req.responder_resources = conn_param->responder_resources; 2782 req.initiator_depth = conn_param->initiator_depth; 2783 req.flow_control = conn_param->flow_control; 2784 req.retry_count = min_t(u8, 7, conn_param->retry_count); 2785 req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count); 2786 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; 2787 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; 2788 req.max_cm_retries = CMA_MAX_CM_RETRIES; 2789 req.srq = id_priv->srq ? 1 : 0; 2790 2791 ret = ib_send_cm_req(id_priv->cm_id.ib, &req); 2792 out: 2793 if (ret && !IS_ERR(id)) { 2794 ib_destroy_cm_id(id); 2795 id_priv->cm_id.ib = NULL; 2796 } 2797 2798 kfree(private_data); 2799 return ret; 2800 } 2801 2802 static int cma_connect_iw(struct rdma_id_private *id_priv, 2803 struct rdma_conn_param *conn_param) 2804 { 2805 struct iw_cm_id *cm_id; 2806 struct sockaddr_in* sin; 2807 int ret; 2808 struct iw_cm_conn_param iw_param; 2809 2810 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv); 2811 if (IS_ERR(cm_id)) 2812 return PTR_ERR(cm_id); 2813 2814 id_priv->cm_id.iw = cm_id; 2815 2816 sin = (struct sockaddr_in *) cma_src_addr(id_priv); 2817 cm_id->local_addr = *sin; 2818 2819 sin = (struct sockaddr_in *) cma_dst_addr(id_priv); 2820 cm_id->remote_addr = *sin; 2821 2822 ret = cma_modify_qp_rtr(id_priv, conn_param); 2823 if (ret) 2824 goto out; 2825 2826 if (conn_param) { 2827 iw_param.ord = conn_param->initiator_depth; 2828 iw_param.ird = conn_param->responder_resources; 2829 iw_param.private_data = conn_param->private_data; 2830 iw_param.private_data_len = conn_param->private_data_len; 2831 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num; 2832 } else { 2833 memset(&iw_param, 0, sizeof iw_param); 2834 iw_param.qpn = id_priv->qp_num; 2835 } 2836 ret = iw_cm_connect(cm_id, &iw_param); 2837 out: 2838 if (ret) { 2839 iw_destroy_cm_id(cm_id); 2840 id_priv->cm_id.iw = NULL; 2841 } 2842 return ret; 2843 } 2844 2845 int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) 2846 { 2847 struct rdma_id_private *id_priv; 2848 int ret; 2849 2850 id_priv = container_of(id, struct rdma_id_private, id); 2851 if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT)) 2852 return -EINVAL; 2853 2854 if (!id->qp) { 2855 id_priv->qp_num = conn_param->qp_num; 2856 id_priv->srq = conn_param->srq; 2857 } 2858 2859 switch (rdma_node_get_transport(id->device->node_type)) { 2860 case RDMA_TRANSPORT_IB: 2861 if (id->qp_type == IB_QPT_UD) 2862 ret = cma_resolve_ib_udp(id_priv, conn_param); 2863 else 2864 ret = cma_connect_ib(id_priv, conn_param); 2865 break; 2866 case RDMA_TRANSPORT_IWARP: 2867 ret = cma_connect_iw(id_priv, conn_param); 2868 break; 2869 default: 2870 ret = -ENOSYS; 2871 break; 2872 } 2873 if (ret) 2874 goto err; 2875 2876 return 0; 2877 err: 2878 cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED); 2879 return ret; 2880 } 2881 EXPORT_SYMBOL(rdma_connect); 2882 2883 static int cma_accept_ib(struct rdma_id_private *id_priv, 2884 struct rdma_conn_param *conn_param) 2885 { 2886 struct ib_cm_rep_param rep; 2887 int ret; 2888 2889 ret = cma_modify_qp_rtr(id_priv, conn_param); 2890 if (ret) 2891 goto out; 2892 2893 ret = cma_modify_qp_rts(id_priv, conn_param); 2894 if (ret) 2895 goto out; 2896 2897 memset(&rep, 0, sizeof rep); 2898 rep.qp_num = id_priv->qp_num; 2899 rep.starting_psn = id_priv->seq_num; 2900 rep.private_data = conn_param->private_data; 2901 rep.private_data_len = conn_param->private_data_len; 2902 rep.responder_resources = conn_param->responder_resources; 2903 rep.initiator_depth = conn_param->initiator_depth; 2904 rep.failover_accepted = 0; 2905 rep.flow_control = conn_param->flow_control; 2906 rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count); 2907 rep.srq = id_priv->srq ? 1 : 0; 2908 2909 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep); 2910 out: 2911 return ret; 2912 } 2913 2914 static int cma_accept_iw(struct rdma_id_private *id_priv, 2915 struct rdma_conn_param *conn_param) 2916 { 2917 struct iw_cm_conn_param iw_param; 2918 int ret; 2919 2920 ret = cma_modify_qp_rtr(id_priv, conn_param); 2921 if (ret) 2922 return ret; 2923 2924 iw_param.ord = conn_param->initiator_depth; 2925 iw_param.ird = conn_param->responder_resources; 2926 iw_param.private_data = conn_param->private_data; 2927 iw_param.private_data_len = conn_param->private_data_len; 2928 if (id_priv->id.qp) { 2929 iw_param.qpn = id_priv->qp_num; 2930 } else 2931 iw_param.qpn = conn_param->qp_num; 2932 2933 return iw_cm_accept(id_priv->cm_id.iw, &iw_param); 2934 } 2935 2936 static int cma_send_sidr_rep(struct rdma_id_private *id_priv, 2937 enum ib_cm_sidr_status status, u32 qkey, 2938 const void *private_data, int private_data_len) 2939 { 2940 struct ib_cm_sidr_rep_param rep; 2941 int ret; 2942 2943 memset(&rep, 0, sizeof rep); 2944 rep.status = status; 2945 if (status == IB_SIDR_SUCCESS) { 2946 ret = cma_set_qkey(id_priv, qkey); 2947 if (ret) 2948 return ret; 2949 rep.qp_num = id_priv->qp_num; 2950 rep.qkey = id_priv->qkey; 2951 } 2952 rep.private_data = private_data; 2953 rep.private_data_len = private_data_len; 2954 2955 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep); 2956 } 2957 2958 int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) 2959 { 2960 struct rdma_id_private *id_priv; 2961 int ret; 2962 2963 id_priv = container_of(id, struct rdma_id_private, id); 2964 2965 id_priv->owner = task_pid_nr(current); 2966 2967 if (!cma_comp(id_priv, RDMA_CM_CONNECT)) 2968 return -EINVAL; 2969 2970 if (!id->qp && conn_param) { 2971 id_priv->qp_num = conn_param->qp_num; 2972 id_priv->srq = conn_param->srq; 2973 } 2974 2975 switch (rdma_node_get_transport(id->device->node_type)) { 2976 case RDMA_TRANSPORT_IB: 2977 if (id->qp_type == IB_QPT_UD) { 2978 if (conn_param) 2979 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS, 2980 conn_param->qkey, 2981 conn_param->private_data, 2982 conn_param->private_data_len); 2983 else 2984 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS, 2985 0, NULL, 0); 2986 } else { 2987 if (conn_param) 2988 ret = cma_accept_ib(id_priv, conn_param); 2989 else 2990 ret = cma_rep_recv(id_priv); 2991 } 2992 break; 2993 case RDMA_TRANSPORT_IWARP: 2994 ret = cma_accept_iw(id_priv, conn_param); 2995 break; 2996 default: 2997 ret = -ENOSYS; 2998 break; 2999 } 3000 3001 if (ret) 3002 goto reject; 3003 3004 return 0; 3005 reject: 3006 cma_modify_qp_err(id_priv); 3007 rdma_reject(id, NULL, 0); 3008 return ret; 3009 } 3010 EXPORT_SYMBOL(rdma_accept); 3011 3012 int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event) 3013 { 3014 struct rdma_id_private *id_priv; 3015 int ret; 3016 3017 id_priv = container_of(id, struct rdma_id_private, id); 3018 if (!id_priv->cm_id.ib) 3019 return -EINVAL; 3020 3021 switch (id->device->node_type) { 3022 case RDMA_NODE_IB_CA: 3023 ret = ib_cm_notify(id_priv->cm_id.ib, event); 3024 break; 3025 default: 3026 ret = 0; 3027 break; 3028 } 3029 return ret; 3030 } 3031 EXPORT_SYMBOL(rdma_notify); 3032 3033 int rdma_reject(struct rdma_cm_id *id, const void *private_data, 3034 u8 private_data_len) 3035 { 3036 struct rdma_id_private *id_priv; 3037 int ret; 3038 3039 id_priv = container_of(id, struct rdma_id_private, id); 3040 if (!id_priv->cm_id.ib) 3041 return -EINVAL; 3042 3043 switch (rdma_node_get_transport(id->device->node_type)) { 3044 case RDMA_TRANSPORT_IB: 3045 if (id->qp_type == IB_QPT_UD) 3046 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0, 3047 private_data, private_data_len); 3048 else 3049 ret = ib_send_cm_rej(id_priv->cm_id.ib, 3050 IB_CM_REJ_CONSUMER_DEFINED, NULL, 3051 0, private_data, private_data_len); 3052 break; 3053 case RDMA_TRANSPORT_IWARP: 3054 ret = iw_cm_reject(id_priv->cm_id.iw, 3055 private_data, private_data_len); 3056 break; 3057 default: 3058 ret = -ENOSYS; 3059 break; 3060 } 3061 return ret; 3062 } 3063 EXPORT_SYMBOL(rdma_reject); 3064 3065 int rdma_disconnect(struct rdma_cm_id *id) 3066 { 3067 struct rdma_id_private *id_priv; 3068 int ret; 3069 3070 id_priv = container_of(id, struct rdma_id_private, id); 3071 if (!id_priv->cm_id.ib) 3072 return -EINVAL; 3073 3074 switch (rdma_node_get_transport(id->device->node_type)) { 3075 case RDMA_TRANSPORT_IB: 3076 ret = cma_modify_qp_err(id_priv); 3077 if (ret) 3078 goto out; 3079 /* Initiate or respond to a disconnect. */ 3080 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0)) 3081 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0); 3082 break; 3083 case RDMA_TRANSPORT_IWARP: 3084 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0); 3085 break; 3086 default: 3087 ret = -EINVAL; 3088 break; 3089 } 3090 out: 3091 return ret; 3092 } 3093 EXPORT_SYMBOL(rdma_disconnect); 3094 3095 static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast) 3096 { 3097 struct rdma_id_private *id_priv; 3098 struct cma_multicast *mc = multicast->context; 3099 struct rdma_cm_event event; 3100 int ret; 3101 3102 id_priv = mc->id_priv; 3103 if (cma_disable_callback(id_priv, RDMA_CM_ADDR_BOUND) && 3104 cma_disable_callback(id_priv, RDMA_CM_ADDR_RESOLVED)) 3105 return 0; 3106 3107 if (!status) 3108 status = cma_set_qkey(id_priv, be32_to_cpu(multicast->rec.qkey)); 3109 mutex_lock(&id_priv->qp_mutex); 3110 if (!status && id_priv->id.qp) 3111 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid, 3112 be16_to_cpu(multicast->rec.mlid)); 3113 mutex_unlock(&id_priv->qp_mutex); 3114 3115 memset(&event, 0, sizeof event); 3116 event.status = status; 3117 event.param.ud.private_data = mc->context; 3118 if (!status) { 3119 event.event = RDMA_CM_EVENT_MULTICAST_JOIN; 3120 ib_init_ah_from_mcmember(id_priv->id.device, 3121 id_priv->id.port_num, &multicast->rec, 3122 &event.param.ud.ah_attr); 3123 event.param.ud.qp_num = 0xFFFFFF; 3124 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey); 3125 } else 3126 event.event = RDMA_CM_EVENT_MULTICAST_ERROR; 3127 3128 ret = id_priv->id.event_handler(&id_priv->id, &event); 3129 if (ret) { 3130 cma_exch(id_priv, RDMA_CM_DESTROYING); 3131 mutex_unlock(&id_priv->handler_mutex); 3132 rdma_destroy_id(&id_priv->id); 3133 return 0; 3134 } 3135 3136 mutex_unlock(&id_priv->handler_mutex); 3137 return 0; 3138 } 3139 3140 static void cma_set_mgid(struct rdma_id_private *id_priv, 3141 struct sockaddr *addr, union ib_gid *mgid) 3142 { 3143 unsigned char mc_map[MAX_ADDR_LEN]; 3144 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 3145 struct sockaddr_in *sin = (struct sockaddr_in *) addr; 3146 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr; 3147 3148 if (cma_any_addr(addr)) { 3149 memset(mgid, 0, sizeof *mgid); 3150 } else if ((addr->sa_family == AF_INET6) && 3151 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) == 3152 0xFF10A01B)) { 3153 /* IPv6 address is an SA assigned MGID. */ 3154 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid); 3155 } else if (addr->sa_family == AF_IB) { 3156 memcpy(mgid, &((struct sockaddr_ib *) addr)->sib_addr, sizeof *mgid); 3157 } else if ((addr->sa_family == AF_INET6)) { 3158 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map); 3159 if (id_priv->id.ps == RDMA_PS_UDP) 3160 mc_map[7] = 0x01; /* Use RDMA CM signature */ 3161 *mgid = *(union ib_gid *) (mc_map + 4); 3162 } else { 3163 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map); 3164 if (id_priv->id.ps == RDMA_PS_UDP) 3165 mc_map[7] = 0x01; /* Use RDMA CM signature */ 3166 *mgid = *(union ib_gid *) (mc_map + 4); 3167 } 3168 } 3169 3170 static int cma_join_ib_multicast(struct rdma_id_private *id_priv, 3171 struct cma_multicast *mc) 3172 { 3173 struct ib_sa_mcmember_rec rec; 3174 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 3175 ib_sa_comp_mask comp_mask; 3176 int ret; 3177 3178 ib_addr_get_mgid(dev_addr, &rec.mgid); 3179 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num, 3180 &rec.mgid, &rec); 3181 if (ret) 3182 return ret; 3183 3184 ret = cma_set_qkey(id_priv, 0); 3185 if (ret) 3186 return ret; 3187 3188 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid); 3189 rec.qkey = cpu_to_be32(id_priv->qkey); 3190 rdma_addr_get_sgid(dev_addr, &rec.port_gid); 3191 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); 3192 rec.join_state = 1; 3193 3194 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID | 3195 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE | 3196 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL | 3197 IB_SA_MCMEMBER_REC_FLOW_LABEL | 3198 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS; 3199 3200 if (id_priv->id.ps == RDMA_PS_IPOIB) 3201 comp_mask |= IB_SA_MCMEMBER_REC_RATE | 3202 IB_SA_MCMEMBER_REC_RATE_SELECTOR | 3203 IB_SA_MCMEMBER_REC_MTU_SELECTOR | 3204 IB_SA_MCMEMBER_REC_MTU | 3205 IB_SA_MCMEMBER_REC_HOP_LIMIT; 3206 3207 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device, 3208 id_priv->id.port_num, &rec, 3209 comp_mask, GFP_KERNEL, 3210 cma_ib_mc_handler, mc); 3211 return PTR_RET(mc->multicast.ib); 3212 } 3213 3214 static void iboe_mcast_work_handler(struct work_struct *work) 3215 { 3216 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work); 3217 struct cma_multicast *mc = mw->mc; 3218 struct ib_sa_multicast *m = mc->multicast.ib; 3219 3220 mc->multicast.ib->context = mc; 3221 cma_ib_mc_handler(0, m); 3222 kref_put(&mc->mcref, release_mc); 3223 kfree(mw); 3224 } 3225 3226 static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid) 3227 { 3228 struct sockaddr_in *sin = (struct sockaddr_in *)addr; 3229 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr; 3230 3231 if (cma_any_addr(addr)) { 3232 memset(mgid, 0, sizeof *mgid); 3233 } else if (addr->sa_family == AF_INET6) { 3234 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid); 3235 } else { 3236 mgid->raw[0] = 0xff; 3237 mgid->raw[1] = 0x0e; 3238 mgid->raw[2] = 0; 3239 mgid->raw[3] = 0; 3240 mgid->raw[4] = 0; 3241 mgid->raw[5] = 0; 3242 mgid->raw[6] = 0; 3243 mgid->raw[7] = 0; 3244 mgid->raw[8] = 0; 3245 mgid->raw[9] = 0; 3246 mgid->raw[10] = 0xff; 3247 mgid->raw[11] = 0xff; 3248 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr; 3249 } 3250 } 3251 3252 static int cma_iboe_join_multicast(struct rdma_id_private *id_priv, 3253 struct cma_multicast *mc) 3254 { 3255 struct iboe_mcast_work *work; 3256 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 3257 int err; 3258 struct sockaddr *addr = (struct sockaddr *)&mc->addr; 3259 struct net_device *ndev = NULL; 3260 3261 if (cma_zero_addr((struct sockaddr *)&mc->addr)) 3262 return -EINVAL; 3263 3264 work = kzalloc(sizeof *work, GFP_KERNEL); 3265 if (!work) 3266 return -ENOMEM; 3267 3268 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL); 3269 if (!mc->multicast.ib) { 3270 err = -ENOMEM; 3271 goto out1; 3272 } 3273 3274 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid); 3275 3276 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff); 3277 if (id_priv->id.ps == RDMA_PS_UDP) 3278 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY); 3279 3280 if (dev_addr->bound_dev_if) 3281 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if); 3282 if (!ndev) { 3283 err = -ENODEV; 3284 goto out2; 3285 } 3286 mc->multicast.ib->rec.rate = iboe_get_rate(ndev); 3287 mc->multicast.ib->rec.hop_limit = 1; 3288 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu); 3289 dev_put(ndev); 3290 if (!mc->multicast.ib->rec.mtu) { 3291 err = -EINVAL; 3292 goto out2; 3293 } 3294 iboe_addr_get_sgid(dev_addr, &mc->multicast.ib->rec.port_gid); 3295 work->id = id_priv; 3296 work->mc = mc; 3297 INIT_WORK(&work->work, iboe_mcast_work_handler); 3298 kref_get(&mc->mcref); 3299 queue_work(cma_wq, &work->work); 3300 3301 return 0; 3302 3303 out2: 3304 kfree(mc->multicast.ib); 3305 out1: 3306 kfree(work); 3307 return err; 3308 } 3309 3310 int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr, 3311 void *context) 3312 { 3313 struct rdma_id_private *id_priv; 3314 struct cma_multicast *mc; 3315 int ret; 3316 3317 id_priv = container_of(id, struct rdma_id_private, id); 3318 if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) && 3319 !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED)) 3320 return -EINVAL; 3321 3322 mc = kmalloc(sizeof *mc, GFP_KERNEL); 3323 if (!mc) 3324 return -ENOMEM; 3325 3326 memcpy(&mc->addr, addr, rdma_addr_size(addr)); 3327 mc->context = context; 3328 mc->id_priv = id_priv; 3329 3330 spin_lock(&id_priv->lock); 3331 list_add(&mc->list, &id_priv->mc_list); 3332 spin_unlock(&id_priv->lock); 3333 3334 switch (rdma_node_get_transport(id->device->node_type)) { 3335 case RDMA_TRANSPORT_IB: 3336 switch (rdma_port_get_link_layer(id->device, id->port_num)) { 3337 case IB_LINK_LAYER_INFINIBAND: 3338 ret = cma_join_ib_multicast(id_priv, mc); 3339 break; 3340 case IB_LINK_LAYER_ETHERNET: 3341 kref_init(&mc->mcref); 3342 ret = cma_iboe_join_multicast(id_priv, mc); 3343 break; 3344 default: 3345 ret = -EINVAL; 3346 } 3347 break; 3348 default: 3349 ret = -ENOSYS; 3350 break; 3351 } 3352 3353 if (ret) { 3354 spin_lock_irq(&id_priv->lock); 3355 list_del(&mc->list); 3356 spin_unlock_irq(&id_priv->lock); 3357 kfree(mc); 3358 } 3359 return ret; 3360 } 3361 EXPORT_SYMBOL(rdma_join_multicast); 3362 3363 void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr) 3364 { 3365 struct rdma_id_private *id_priv; 3366 struct cma_multicast *mc; 3367 3368 id_priv = container_of(id, struct rdma_id_private, id); 3369 spin_lock_irq(&id_priv->lock); 3370 list_for_each_entry(mc, &id_priv->mc_list, list) { 3371 if (!memcmp(&mc->addr, addr, rdma_addr_size(addr))) { 3372 list_del(&mc->list); 3373 spin_unlock_irq(&id_priv->lock); 3374 3375 if (id->qp) 3376 ib_detach_mcast(id->qp, 3377 &mc->multicast.ib->rec.mgid, 3378 be16_to_cpu(mc->multicast.ib->rec.mlid)); 3379 if (rdma_node_get_transport(id_priv->cma_dev->device->node_type) == RDMA_TRANSPORT_IB) { 3380 switch (rdma_port_get_link_layer(id->device, id->port_num)) { 3381 case IB_LINK_LAYER_INFINIBAND: 3382 ib_sa_free_multicast(mc->multicast.ib); 3383 kfree(mc); 3384 break; 3385 case IB_LINK_LAYER_ETHERNET: 3386 kref_put(&mc->mcref, release_mc); 3387 break; 3388 default: 3389 break; 3390 } 3391 } 3392 return; 3393 } 3394 } 3395 spin_unlock_irq(&id_priv->lock); 3396 } 3397 EXPORT_SYMBOL(rdma_leave_multicast); 3398 3399 static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv) 3400 { 3401 struct rdma_dev_addr *dev_addr; 3402 struct cma_ndev_work *work; 3403 3404 dev_addr = &id_priv->id.route.addr.dev_addr; 3405 3406 if ((dev_addr->bound_dev_if == ndev->ifindex) && 3407 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) { 3408 printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n", 3409 ndev->name, &id_priv->id); 3410 work = kzalloc(sizeof *work, GFP_KERNEL); 3411 if (!work) 3412 return -ENOMEM; 3413 3414 INIT_WORK(&work->work, cma_ndev_work_handler); 3415 work->id = id_priv; 3416 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE; 3417 atomic_inc(&id_priv->refcount); 3418 queue_work(cma_wq, &work->work); 3419 } 3420 3421 return 0; 3422 } 3423 3424 static int cma_netdev_callback(struct notifier_block *self, unsigned long event, 3425 void *ptr) 3426 { 3427 struct net_device *ndev = netdev_notifier_info_to_dev(ptr); 3428 struct cma_device *cma_dev; 3429 struct rdma_id_private *id_priv; 3430 int ret = NOTIFY_DONE; 3431 3432 if (dev_net(ndev) != &init_net) 3433 return NOTIFY_DONE; 3434 3435 if (event != NETDEV_BONDING_FAILOVER) 3436 return NOTIFY_DONE; 3437 3438 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING)) 3439 return NOTIFY_DONE; 3440 3441 mutex_lock(&lock); 3442 list_for_each_entry(cma_dev, &dev_list, list) 3443 list_for_each_entry(id_priv, &cma_dev->id_list, list) { 3444 ret = cma_netdev_change(ndev, id_priv); 3445 if (ret) 3446 goto out; 3447 } 3448 3449 out: 3450 mutex_unlock(&lock); 3451 return ret; 3452 } 3453 3454 static struct notifier_block cma_nb = { 3455 .notifier_call = cma_netdev_callback 3456 }; 3457 3458 static void cma_add_one(struct ib_device *device) 3459 { 3460 struct cma_device *cma_dev; 3461 struct rdma_id_private *id_priv; 3462 3463 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL); 3464 if (!cma_dev) 3465 return; 3466 3467 cma_dev->device = device; 3468 3469 init_completion(&cma_dev->comp); 3470 atomic_set(&cma_dev->refcount, 1); 3471 INIT_LIST_HEAD(&cma_dev->id_list); 3472 ib_set_client_data(device, &cma_client, cma_dev); 3473 3474 mutex_lock(&lock); 3475 list_add_tail(&cma_dev->list, &dev_list); 3476 list_for_each_entry(id_priv, &listen_any_list, list) 3477 cma_listen_on_dev(id_priv, cma_dev); 3478 mutex_unlock(&lock); 3479 } 3480 3481 static int cma_remove_id_dev(struct rdma_id_private *id_priv) 3482 { 3483 struct rdma_cm_event event; 3484 enum rdma_cm_state state; 3485 int ret = 0; 3486 3487 /* Record that we want to remove the device */ 3488 state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL); 3489 if (state == RDMA_CM_DESTROYING) 3490 return 0; 3491 3492 cma_cancel_operation(id_priv, state); 3493 mutex_lock(&id_priv->handler_mutex); 3494 3495 /* Check for destruction from another callback. */ 3496 if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL)) 3497 goto out; 3498 3499 memset(&event, 0, sizeof event); 3500 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL; 3501 ret = id_priv->id.event_handler(&id_priv->id, &event); 3502 out: 3503 mutex_unlock(&id_priv->handler_mutex); 3504 return ret; 3505 } 3506 3507 static void cma_process_remove(struct cma_device *cma_dev) 3508 { 3509 struct rdma_id_private *id_priv; 3510 int ret; 3511 3512 mutex_lock(&lock); 3513 while (!list_empty(&cma_dev->id_list)) { 3514 id_priv = list_entry(cma_dev->id_list.next, 3515 struct rdma_id_private, list); 3516 3517 list_del(&id_priv->listen_list); 3518 list_del_init(&id_priv->list); 3519 atomic_inc(&id_priv->refcount); 3520 mutex_unlock(&lock); 3521 3522 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv); 3523 cma_deref_id(id_priv); 3524 if (ret) 3525 rdma_destroy_id(&id_priv->id); 3526 3527 mutex_lock(&lock); 3528 } 3529 mutex_unlock(&lock); 3530 3531 cma_deref_dev(cma_dev); 3532 wait_for_completion(&cma_dev->comp); 3533 } 3534 3535 static void cma_remove_one(struct ib_device *device) 3536 { 3537 struct cma_device *cma_dev; 3538 3539 cma_dev = ib_get_client_data(device, &cma_client); 3540 if (!cma_dev) 3541 return; 3542 3543 mutex_lock(&lock); 3544 list_del(&cma_dev->list); 3545 mutex_unlock(&lock); 3546 3547 cma_process_remove(cma_dev); 3548 kfree(cma_dev); 3549 } 3550 3551 static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb) 3552 { 3553 struct nlmsghdr *nlh; 3554 struct rdma_cm_id_stats *id_stats; 3555 struct rdma_id_private *id_priv; 3556 struct rdma_cm_id *id = NULL; 3557 struct cma_device *cma_dev; 3558 int i_dev = 0, i_id = 0; 3559 3560 /* 3561 * We export all of the IDs as a sequence of messages. Each 3562 * ID gets its own netlink message. 3563 */ 3564 mutex_lock(&lock); 3565 3566 list_for_each_entry(cma_dev, &dev_list, list) { 3567 if (i_dev < cb->args[0]) { 3568 i_dev++; 3569 continue; 3570 } 3571 3572 i_id = 0; 3573 list_for_each_entry(id_priv, &cma_dev->id_list, list) { 3574 if (i_id < cb->args[1]) { 3575 i_id++; 3576 continue; 3577 } 3578 3579 id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq, 3580 sizeof *id_stats, RDMA_NL_RDMA_CM, 3581 RDMA_NL_RDMA_CM_ID_STATS); 3582 if (!id_stats) 3583 goto out; 3584 3585 memset(id_stats, 0, sizeof *id_stats); 3586 id = &id_priv->id; 3587 id_stats->node_type = id->route.addr.dev_addr.dev_type; 3588 id_stats->port_num = id->port_num; 3589 id_stats->bound_dev_if = 3590 id->route.addr.dev_addr.bound_dev_if; 3591 3592 if (ibnl_put_attr(skb, nlh, 3593 rdma_addr_size(cma_src_addr(id_priv)), 3594 cma_src_addr(id_priv), 3595 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR)) 3596 goto out; 3597 if (ibnl_put_attr(skb, nlh, 3598 rdma_addr_size(cma_src_addr(id_priv)), 3599 cma_dst_addr(id_priv), 3600 RDMA_NL_RDMA_CM_ATTR_DST_ADDR)) 3601 goto out; 3602 3603 id_stats->pid = id_priv->owner; 3604 id_stats->port_space = id->ps; 3605 id_stats->cm_state = id_priv->state; 3606 id_stats->qp_num = id_priv->qp_num; 3607 id_stats->qp_type = id->qp_type; 3608 3609 i_id++; 3610 } 3611 3612 cb->args[1] = 0; 3613 i_dev++; 3614 } 3615 3616 out: 3617 mutex_unlock(&lock); 3618 cb->args[0] = i_dev; 3619 cb->args[1] = i_id; 3620 3621 return skb->len; 3622 } 3623 3624 static const struct ibnl_client_cbs cma_cb_table[] = { 3625 [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats, 3626 .module = THIS_MODULE }, 3627 }; 3628 3629 static int __init cma_init(void) 3630 { 3631 int ret; 3632 3633 cma_wq = create_singlethread_workqueue("rdma_cm"); 3634 if (!cma_wq) 3635 return -ENOMEM; 3636 3637 ib_sa_register_client(&sa_client); 3638 rdma_addr_register_client(&addr_client); 3639 register_netdevice_notifier(&cma_nb); 3640 3641 ret = ib_register_client(&cma_client); 3642 if (ret) 3643 goto err; 3644 3645 if (ibnl_add_client(RDMA_NL_RDMA_CM, RDMA_NL_RDMA_CM_NUM_OPS, cma_cb_table)) 3646 printk(KERN_WARNING "RDMA CMA: failed to add netlink callback\n"); 3647 3648 return 0; 3649 3650 err: 3651 unregister_netdevice_notifier(&cma_nb); 3652 rdma_addr_unregister_client(&addr_client); 3653 ib_sa_unregister_client(&sa_client); 3654 destroy_workqueue(cma_wq); 3655 return ret; 3656 } 3657 3658 static void __exit cma_cleanup(void) 3659 { 3660 ibnl_remove_client(RDMA_NL_RDMA_CM); 3661 ib_unregister_client(&cma_client); 3662 unregister_netdevice_notifier(&cma_nb); 3663 rdma_addr_unregister_client(&addr_client); 3664 ib_sa_unregister_client(&sa_client); 3665 destroy_workqueue(cma_wq); 3666 idr_destroy(&tcp_ps); 3667 idr_destroy(&udp_ps); 3668 idr_destroy(&ipoib_ps); 3669 idr_destroy(&ib_ps); 3670 } 3671 3672 module_init(cma_init); 3673 module_exit(cma_cleanup); 3674