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 45 #include <net/tcp.h> 46 #include <net/ipv6.h> 47 48 #include <rdma/rdma_cm.h> 49 #include <rdma/rdma_cm_ib.h> 50 #include <rdma/ib_cache.h> 51 #include <rdma/ib_cm.h> 52 #include <rdma/ib_sa.h> 53 #include <rdma/iw_cm.h> 54 55 MODULE_AUTHOR("Sean Hefty"); 56 MODULE_DESCRIPTION("Generic RDMA CM Agent"); 57 MODULE_LICENSE("Dual BSD/GPL"); 58 59 #define CMA_CM_RESPONSE_TIMEOUT 20 60 #define CMA_MAX_CM_RETRIES 15 61 #define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24) 62 #define CMA_IBOE_PACKET_LIFETIME 18 63 64 static void cma_add_one(struct ib_device *device); 65 static void cma_remove_one(struct ib_device *device); 66 67 static struct ib_client cma_client = { 68 .name = "cma", 69 .add = cma_add_one, 70 .remove = cma_remove_one 71 }; 72 73 static struct ib_sa_client sa_client; 74 static struct rdma_addr_client addr_client; 75 static LIST_HEAD(dev_list); 76 static LIST_HEAD(listen_any_list); 77 static DEFINE_MUTEX(lock); 78 static struct workqueue_struct *cma_wq; 79 static DEFINE_IDR(sdp_ps); 80 static DEFINE_IDR(tcp_ps); 81 static DEFINE_IDR(udp_ps); 82 static DEFINE_IDR(ipoib_ps); 83 84 struct cma_device { 85 struct list_head list; 86 struct ib_device *device; 87 struct completion comp; 88 atomic_t refcount; 89 struct list_head id_list; 90 }; 91 92 enum cma_state { 93 CMA_IDLE, 94 CMA_ADDR_QUERY, 95 CMA_ADDR_RESOLVED, 96 CMA_ROUTE_QUERY, 97 CMA_ROUTE_RESOLVED, 98 CMA_CONNECT, 99 CMA_DISCONNECT, 100 CMA_ADDR_BOUND, 101 CMA_LISTEN, 102 CMA_DEVICE_REMOVAL, 103 CMA_DESTROYING 104 }; 105 106 struct rdma_bind_list { 107 struct idr *ps; 108 struct hlist_head owners; 109 unsigned short port; 110 }; 111 112 /* 113 * Device removal can occur at anytime, so we need extra handling to 114 * serialize notifying the user of device removal with other callbacks. 115 * We do this by disabling removal notification while a callback is in process, 116 * and reporting it after the callback completes. 117 */ 118 struct rdma_id_private { 119 struct rdma_cm_id id; 120 121 struct rdma_bind_list *bind_list; 122 struct hlist_node node; 123 struct list_head list; /* listen_any_list or cma_device.list */ 124 struct list_head listen_list; /* per device listens */ 125 struct cma_device *cma_dev; 126 struct list_head mc_list; 127 128 int internal_id; 129 enum cma_state state; 130 spinlock_t lock; 131 struct mutex qp_mutex; 132 133 struct completion comp; 134 atomic_t refcount; 135 struct mutex handler_mutex; 136 137 int backlog; 138 int timeout_ms; 139 struct ib_sa_query *query; 140 int query_id; 141 union { 142 struct ib_cm_id *ib; 143 struct iw_cm_id *iw; 144 } cm_id; 145 146 u32 seq_num; 147 u32 qkey; 148 u32 qp_num; 149 u8 srq; 150 u8 tos; 151 }; 152 153 struct cma_multicast { 154 struct rdma_id_private *id_priv; 155 union { 156 struct ib_sa_multicast *ib; 157 } multicast; 158 struct list_head list; 159 void *context; 160 struct sockaddr_storage addr; 161 struct kref mcref; 162 }; 163 164 struct cma_work { 165 struct work_struct work; 166 struct rdma_id_private *id; 167 enum cma_state old_state; 168 enum cma_state new_state; 169 struct rdma_cm_event event; 170 }; 171 172 struct cma_ndev_work { 173 struct work_struct work; 174 struct rdma_id_private *id; 175 struct rdma_cm_event event; 176 }; 177 178 struct iboe_mcast_work { 179 struct work_struct work; 180 struct rdma_id_private *id; 181 struct cma_multicast *mc; 182 }; 183 184 union cma_ip_addr { 185 struct in6_addr ip6; 186 struct { 187 __be32 pad[3]; 188 __be32 addr; 189 } ip4; 190 }; 191 192 struct cma_hdr { 193 u8 cma_version; 194 u8 ip_version; /* IP version: 7:4 */ 195 __be16 port; 196 union cma_ip_addr src_addr; 197 union cma_ip_addr dst_addr; 198 }; 199 200 struct sdp_hh { 201 u8 bsdh[16]; 202 u8 sdp_version; /* Major version: 7:4 */ 203 u8 ip_version; /* IP version: 7:4 */ 204 u8 sdp_specific1[10]; 205 __be16 port; 206 __be16 sdp_specific2; 207 union cma_ip_addr src_addr; 208 union cma_ip_addr dst_addr; 209 }; 210 211 struct sdp_hah { 212 u8 bsdh[16]; 213 u8 sdp_version; 214 }; 215 216 #define CMA_VERSION 0x00 217 #define SDP_MAJ_VERSION 0x2 218 219 static int cma_comp(struct rdma_id_private *id_priv, enum cma_state comp) 220 { 221 unsigned long flags; 222 int ret; 223 224 spin_lock_irqsave(&id_priv->lock, flags); 225 ret = (id_priv->state == comp); 226 spin_unlock_irqrestore(&id_priv->lock, flags); 227 return ret; 228 } 229 230 static int cma_comp_exch(struct rdma_id_private *id_priv, 231 enum cma_state comp, enum cma_state exch) 232 { 233 unsigned long flags; 234 int ret; 235 236 spin_lock_irqsave(&id_priv->lock, flags); 237 if ((ret = (id_priv->state == comp))) 238 id_priv->state = exch; 239 spin_unlock_irqrestore(&id_priv->lock, flags); 240 return ret; 241 } 242 243 static enum cma_state cma_exch(struct rdma_id_private *id_priv, 244 enum cma_state exch) 245 { 246 unsigned long flags; 247 enum cma_state old; 248 249 spin_lock_irqsave(&id_priv->lock, flags); 250 old = id_priv->state; 251 id_priv->state = exch; 252 spin_unlock_irqrestore(&id_priv->lock, flags); 253 return old; 254 } 255 256 static inline u8 cma_get_ip_ver(struct cma_hdr *hdr) 257 { 258 return hdr->ip_version >> 4; 259 } 260 261 static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver) 262 { 263 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF); 264 } 265 266 static inline u8 sdp_get_majv(u8 sdp_version) 267 { 268 return sdp_version >> 4; 269 } 270 271 static inline u8 sdp_get_ip_ver(struct sdp_hh *hh) 272 { 273 return hh->ip_version >> 4; 274 } 275 276 static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver) 277 { 278 hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF); 279 } 280 281 static inline int cma_is_ud_ps(enum rdma_port_space ps) 282 { 283 return (ps == RDMA_PS_UDP || ps == RDMA_PS_IPOIB); 284 } 285 286 static void cma_attach_to_dev(struct rdma_id_private *id_priv, 287 struct cma_device *cma_dev) 288 { 289 atomic_inc(&cma_dev->refcount); 290 id_priv->cma_dev = cma_dev; 291 id_priv->id.device = cma_dev->device; 292 id_priv->id.route.addr.dev_addr.transport = 293 rdma_node_get_transport(cma_dev->device->node_type); 294 list_add_tail(&id_priv->list, &cma_dev->id_list); 295 } 296 297 static inline void cma_deref_dev(struct cma_device *cma_dev) 298 { 299 if (atomic_dec_and_test(&cma_dev->refcount)) 300 complete(&cma_dev->comp); 301 } 302 303 static inline void release_mc(struct kref *kref) 304 { 305 struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref); 306 307 kfree(mc->multicast.ib); 308 kfree(mc); 309 } 310 311 static void cma_release_dev(struct rdma_id_private *id_priv) 312 { 313 mutex_lock(&lock); 314 list_del(&id_priv->list); 315 cma_deref_dev(id_priv->cma_dev); 316 id_priv->cma_dev = NULL; 317 mutex_unlock(&lock); 318 } 319 320 static int cma_set_qkey(struct rdma_id_private *id_priv) 321 { 322 struct ib_sa_mcmember_rec rec; 323 int ret = 0; 324 325 if (id_priv->qkey) 326 return 0; 327 328 switch (id_priv->id.ps) { 329 case RDMA_PS_UDP: 330 id_priv->qkey = RDMA_UDP_QKEY; 331 break; 332 case RDMA_PS_IPOIB: 333 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid); 334 ret = ib_sa_get_mcmember_rec(id_priv->id.device, 335 id_priv->id.port_num, &rec.mgid, 336 &rec); 337 if (!ret) 338 id_priv->qkey = be32_to_cpu(rec.qkey); 339 break; 340 default: 341 break; 342 } 343 return ret; 344 } 345 346 static int find_gid_port(struct ib_device *device, union ib_gid *gid, u8 port_num) 347 { 348 int i; 349 int err; 350 struct ib_port_attr props; 351 union ib_gid tmp; 352 353 err = ib_query_port(device, port_num, &props); 354 if (err) 355 return 1; 356 357 for (i = 0; i < props.gid_tbl_len; ++i) { 358 err = ib_query_gid(device, port_num, i, &tmp); 359 if (err) 360 return 1; 361 if (!memcmp(&tmp, gid, sizeof tmp)) 362 return 0; 363 } 364 365 return -EAGAIN; 366 } 367 368 static int cma_acquire_dev(struct rdma_id_private *id_priv) 369 { 370 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 371 struct cma_device *cma_dev; 372 union ib_gid gid, iboe_gid; 373 int ret = -ENODEV; 374 u8 port; 375 enum rdma_link_layer dev_ll = dev_addr->dev_type == ARPHRD_INFINIBAND ? 376 IB_LINK_LAYER_INFINIBAND : IB_LINK_LAYER_ETHERNET; 377 378 mutex_lock(&lock); 379 iboe_addr_get_sgid(dev_addr, &iboe_gid); 380 memcpy(&gid, dev_addr->src_dev_addr + 381 rdma_addr_gid_offset(dev_addr), sizeof gid); 382 list_for_each_entry(cma_dev, &dev_list, list) { 383 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) { 384 if (rdma_port_get_link_layer(cma_dev->device, port) == dev_ll) { 385 if (rdma_node_get_transport(cma_dev->device->node_type) == RDMA_TRANSPORT_IB && 386 rdma_port_get_link_layer(cma_dev->device, port) == IB_LINK_LAYER_ETHERNET) 387 ret = find_gid_port(cma_dev->device, &iboe_gid, port); 388 else 389 ret = find_gid_port(cma_dev->device, &gid, port); 390 391 if (!ret) { 392 id_priv->id.port_num = port; 393 goto out; 394 } else if (ret == 1) 395 break; 396 } 397 } 398 } 399 400 out: 401 if (!ret) 402 cma_attach_to_dev(id_priv, cma_dev); 403 404 mutex_unlock(&lock); 405 return ret; 406 } 407 408 static void cma_deref_id(struct rdma_id_private *id_priv) 409 { 410 if (atomic_dec_and_test(&id_priv->refcount)) 411 complete(&id_priv->comp); 412 } 413 414 static int cma_disable_callback(struct rdma_id_private *id_priv, 415 enum cma_state state) 416 { 417 mutex_lock(&id_priv->handler_mutex); 418 if (id_priv->state != state) { 419 mutex_unlock(&id_priv->handler_mutex); 420 return -EINVAL; 421 } 422 return 0; 423 } 424 425 static int cma_has_cm_dev(struct rdma_id_private *id_priv) 426 { 427 return (id_priv->id.device && id_priv->cm_id.ib); 428 } 429 430 struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler, 431 void *context, enum rdma_port_space ps) 432 { 433 struct rdma_id_private *id_priv; 434 435 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL); 436 if (!id_priv) 437 return ERR_PTR(-ENOMEM); 438 439 id_priv->state = CMA_IDLE; 440 id_priv->id.context = context; 441 id_priv->id.event_handler = event_handler; 442 id_priv->id.ps = ps; 443 spin_lock_init(&id_priv->lock); 444 mutex_init(&id_priv->qp_mutex); 445 init_completion(&id_priv->comp); 446 atomic_set(&id_priv->refcount, 1); 447 mutex_init(&id_priv->handler_mutex); 448 INIT_LIST_HEAD(&id_priv->listen_list); 449 INIT_LIST_HEAD(&id_priv->mc_list); 450 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num); 451 452 return &id_priv->id; 453 } 454 EXPORT_SYMBOL(rdma_create_id); 455 456 static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp) 457 { 458 struct ib_qp_attr qp_attr; 459 int qp_attr_mask, ret; 460 461 qp_attr.qp_state = IB_QPS_INIT; 462 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 463 if (ret) 464 return ret; 465 466 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); 467 if (ret) 468 return ret; 469 470 qp_attr.qp_state = IB_QPS_RTR; 471 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE); 472 if (ret) 473 return ret; 474 475 qp_attr.qp_state = IB_QPS_RTS; 476 qp_attr.sq_psn = 0; 477 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN); 478 479 return ret; 480 } 481 482 static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp) 483 { 484 struct ib_qp_attr qp_attr; 485 int qp_attr_mask, ret; 486 487 qp_attr.qp_state = IB_QPS_INIT; 488 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 489 if (ret) 490 return ret; 491 492 return ib_modify_qp(qp, &qp_attr, qp_attr_mask); 493 } 494 495 int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd, 496 struct ib_qp_init_attr *qp_init_attr) 497 { 498 struct rdma_id_private *id_priv; 499 struct ib_qp *qp; 500 int ret; 501 502 id_priv = container_of(id, struct rdma_id_private, id); 503 if (id->device != pd->device) 504 return -EINVAL; 505 506 qp = ib_create_qp(pd, qp_init_attr); 507 if (IS_ERR(qp)) 508 return PTR_ERR(qp); 509 510 if (cma_is_ud_ps(id_priv->id.ps)) 511 ret = cma_init_ud_qp(id_priv, qp); 512 else 513 ret = cma_init_conn_qp(id_priv, qp); 514 if (ret) 515 goto err; 516 517 id->qp = qp; 518 id_priv->qp_num = qp->qp_num; 519 id_priv->srq = (qp->srq != NULL); 520 return 0; 521 err: 522 ib_destroy_qp(qp); 523 return ret; 524 } 525 EXPORT_SYMBOL(rdma_create_qp); 526 527 void rdma_destroy_qp(struct rdma_cm_id *id) 528 { 529 struct rdma_id_private *id_priv; 530 531 id_priv = container_of(id, struct rdma_id_private, id); 532 mutex_lock(&id_priv->qp_mutex); 533 ib_destroy_qp(id_priv->id.qp); 534 id_priv->id.qp = NULL; 535 mutex_unlock(&id_priv->qp_mutex); 536 } 537 EXPORT_SYMBOL(rdma_destroy_qp); 538 539 static int cma_modify_qp_rtr(struct rdma_id_private *id_priv, 540 struct rdma_conn_param *conn_param) 541 { 542 struct ib_qp_attr qp_attr; 543 int qp_attr_mask, ret; 544 545 mutex_lock(&id_priv->qp_mutex); 546 if (!id_priv->id.qp) { 547 ret = 0; 548 goto out; 549 } 550 551 /* Need to update QP attributes from default values. */ 552 qp_attr.qp_state = IB_QPS_INIT; 553 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 554 if (ret) 555 goto out; 556 557 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); 558 if (ret) 559 goto out; 560 561 qp_attr.qp_state = IB_QPS_RTR; 562 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 563 if (ret) 564 goto out; 565 566 if (conn_param) 567 qp_attr.max_dest_rd_atomic = conn_param->responder_resources; 568 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); 569 out: 570 mutex_unlock(&id_priv->qp_mutex); 571 return ret; 572 } 573 574 static int cma_modify_qp_rts(struct rdma_id_private *id_priv, 575 struct rdma_conn_param *conn_param) 576 { 577 struct ib_qp_attr qp_attr; 578 int qp_attr_mask, ret; 579 580 mutex_lock(&id_priv->qp_mutex); 581 if (!id_priv->id.qp) { 582 ret = 0; 583 goto out; 584 } 585 586 qp_attr.qp_state = IB_QPS_RTS; 587 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 588 if (ret) 589 goto out; 590 591 if (conn_param) 592 qp_attr.max_rd_atomic = conn_param->initiator_depth; 593 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); 594 out: 595 mutex_unlock(&id_priv->qp_mutex); 596 return ret; 597 } 598 599 static int cma_modify_qp_err(struct rdma_id_private *id_priv) 600 { 601 struct ib_qp_attr qp_attr; 602 int ret; 603 604 mutex_lock(&id_priv->qp_mutex); 605 if (!id_priv->id.qp) { 606 ret = 0; 607 goto out; 608 } 609 610 qp_attr.qp_state = IB_QPS_ERR; 611 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE); 612 out: 613 mutex_unlock(&id_priv->qp_mutex); 614 return ret; 615 } 616 617 static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv, 618 struct ib_qp_attr *qp_attr, int *qp_attr_mask) 619 { 620 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 621 int ret; 622 u16 pkey; 623 624 if (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num) == 625 IB_LINK_LAYER_INFINIBAND) 626 pkey = ib_addr_get_pkey(dev_addr); 627 else 628 pkey = 0xffff; 629 630 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num, 631 pkey, &qp_attr->pkey_index); 632 if (ret) 633 return ret; 634 635 qp_attr->port_num = id_priv->id.port_num; 636 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT; 637 638 if (cma_is_ud_ps(id_priv->id.ps)) { 639 ret = cma_set_qkey(id_priv); 640 if (ret) 641 return ret; 642 643 qp_attr->qkey = id_priv->qkey; 644 *qp_attr_mask |= IB_QP_QKEY; 645 } else { 646 qp_attr->qp_access_flags = 0; 647 *qp_attr_mask |= IB_QP_ACCESS_FLAGS; 648 } 649 return 0; 650 } 651 652 int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr, 653 int *qp_attr_mask) 654 { 655 struct rdma_id_private *id_priv; 656 int ret = 0; 657 658 id_priv = container_of(id, struct rdma_id_private, id); 659 switch (rdma_node_get_transport(id_priv->id.device->node_type)) { 660 case RDMA_TRANSPORT_IB: 661 if (!id_priv->cm_id.ib || cma_is_ud_ps(id_priv->id.ps)) 662 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask); 663 else 664 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr, 665 qp_attr_mask); 666 if (qp_attr->qp_state == IB_QPS_RTR) 667 qp_attr->rq_psn = id_priv->seq_num; 668 break; 669 case RDMA_TRANSPORT_IWARP: 670 if (!id_priv->cm_id.iw) { 671 qp_attr->qp_access_flags = 0; 672 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS; 673 } else 674 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr, 675 qp_attr_mask); 676 break; 677 default: 678 ret = -ENOSYS; 679 break; 680 } 681 682 return ret; 683 } 684 EXPORT_SYMBOL(rdma_init_qp_attr); 685 686 static inline int cma_zero_addr(struct sockaddr *addr) 687 { 688 struct in6_addr *ip6; 689 690 if (addr->sa_family == AF_INET) 691 return ipv4_is_zeronet( 692 ((struct sockaddr_in *)addr)->sin_addr.s_addr); 693 else { 694 ip6 = &((struct sockaddr_in6 *) addr)->sin6_addr; 695 return (ip6->s6_addr32[0] | ip6->s6_addr32[1] | 696 ip6->s6_addr32[2] | ip6->s6_addr32[3]) == 0; 697 } 698 } 699 700 static inline int cma_loopback_addr(struct sockaddr *addr) 701 { 702 if (addr->sa_family == AF_INET) 703 return ipv4_is_loopback( 704 ((struct sockaddr_in *) addr)->sin_addr.s_addr); 705 else 706 return ipv6_addr_loopback( 707 &((struct sockaddr_in6 *) addr)->sin6_addr); 708 } 709 710 static inline int cma_any_addr(struct sockaddr *addr) 711 { 712 return cma_zero_addr(addr) || cma_loopback_addr(addr); 713 } 714 715 static inline __be16 cma_port(struct sockaddr *addr) 716 { 717 if (addr->sa_family == AF_INET) 718 return ((struct sockaddr_in *) addr)->sin_port; 719 else 720 return ((struct sockaddr_in6 *) addr)->sin6_port; 721 } 722 723 static inline int cma_any_port(struct sockaddr *addr) 724 { 725 return !cma_port(addr); 726 } 727 728 static int cma_get_net_info(void *hdr, enum rdma_port_space ps, 729 u8 *ip_ver, __be16 *port, 730 union cma_ip_addr **src, union cma_ip_addr **dst) 731 { 732 switch (ps) { 733 case RDMA_PS_SDP: 734 if (sdp_get_majv(((struct sdp_hh *) hdr)->sdp_version) != 735 SDP_MAJ_VERSION) 736 return -EINVAL; 737 738 *ip_ver = sdp_get_ip_ver(hdr); 739 *port = ((struct sdp_hh *) hdr)->port; 740 *src = &((struct sdp_hh *) hdr)->src_addr; 741 *dst = &((struct sdp_hh *) hdr)->dst_addr; 742 break; 743 default: 744 if (((struct cma_hdr *) hdr)->cma_version != CMA_VERSION) 745 return -EINVAL; 746 747 *ip_ver = cma_get_ip_ver(hdr); 748 *port = ((struct cma_hdr *) hdr)->port; 749 *src = &((struct cma_hdr *) hdr)->src_addr; 750 *dst = &((struct cma_hdr *) hdr)->dst_addr; 751 break; 752 } 753 754 if (*ip_ver != 4 && *ip_ver != 6) 755 return -EINVAL; 756 return 0; 757 } 758 759 static void cma_save_net_info(struct rdma_addr *addr, 760 struct rdma_addr *listen_addr, 761 u8 ip_ver, __be16 port, 762 union cma_ip_addr *src, union cma_ip_addr *dst) 763 { 764 struct sockaddr_in *listen4, *ip4; 765 struct sockaddr_in6 *listen6, *ip6; 766 767 switch (ip_ver) { 768 case 4: 769 listen4 = (struct sockaddr_in *) &listen_addr->src_addr; 770 ip4 = (struct sockaddr_in *) &addr->src_addr; 771 ip4->sin_family = listen4->sin_family; 772 ip4->sin_addr.s_addr = dst->ip4.addr; 773 ip4->sin_port = listen4->sin_port; 774 775 ip4 = (struct sockaddr_in *) &addr->dst_addr; 776 ip4->sin_family = listen4->sin_family; 777 ip4->sin_addr.s_addr = src->ip4.addr; 778 ip4->sin_port = port; 779 break; 780 case 6: 781 listen6 = (struct sockaddr_in6 *) &listen_addr->src_addr; 782 ip6 = (struct sockaddr_in6 *) &addr->src_addr; 783 ip6->sin6_family = listen6->sin6_family; 784 ip6->sin6_addr = dst->ip6; 785 ip6->sin6_port = listen6->sin6_port; 786 787 ip6 = (struct sockaddr_in6 *) &addr->dst_addr; 788 ip6->sin6_family = listen6->sin6_family; 789 ip6->sin6_addr = src->ip6; 790 ip6->sin6_port = port; 791 break; 792 default: 793 break; 794 } 795 } 796 797 static inline int cma_user_data_offset(enum rdma_port_space ps) 798 { 799 switch (ps) { 800 case RDMA_PS_SDP: 801 return 0; 802 default: 803 return sizeof(struct cma_hdr); 804 } 805 } 806 807 static void cma_cancel_route(struct rdma_id_private *id_priv) 808 { 809 switch (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num)) { 810 case IB_LINK_LAYER_INFINIBAND: 811 if (id_priv->query) 812 ib_sa_cancel_query(id_priv->query_id, id_priv->query); 813 break; 814 default: 815 break; 816 } 817 } 818 819 static void cma_cancel_listens(struct rdma_id_private *id_priv) 820 { 821 struct rdma_id_private *dev_id_priv; 822 823 /* 824 * Remove from listen_any_list to prevent added devices from spawning 825 * additional listen requests. 826 */ 827 mutex_lock(&lock); 828 list_del(&id_priv->list); 829 830 while (!list_empty(&id_priv->listen_list)) { 831 dev_id_priv = list_entry(id_priv->listen_list.next, 832 struct rdma_id_private, listen_list); 833 /* sync with device removal to avoid duplicate destruction */ 834 list_del_init(&dev_id_priv->list); 835 list_del(&dev_id_priv->listen_list); 836 mutex_unlock(&lock); 837 838 rdma_destroy_id(&dev_id_priv->id); 839 mutex_lock(&lock); 840 } 841 mutex_unlock(&lock); 842 } 843 844 static void cma_cancel_operation(struct rdma_id_private *id_priv, 845 enum cma_state state) 846 { 847 switch (state) { 848 case CMA_ADDR_QUERY: 849 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr); 850 break; 851 case CMA_ROUTE_QUERY: 852 cma_cancel_route(id_priv); 853 break; 854 case CMA_LISTEN: 855 if (cma_any_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr) 856 && !id_priv->cma_dev) 857 cma_cancel_listens(id_priv); 858 break; 859 default: 860 break; 861 } 862 } 863 864 static void cma_release_port(struct rdma_id_private *id_priv) 865 { 866 struct rdma_bind_list *bind_list = id_priv->bind_list; 867 868 if (!bind_list) 869 return; 870 871 mutex_lock(&lock); 872 hlist_del(&id_priv->node); 873 if (hlist_empty(&bind_list->owners)) { 874 idr_remove(bind_list->ps, bind_list->port); 875 kfree(bind_list); 876 } 877 mutex_unlock(&lock); 878 } 879 880 static void cma_leave_mc_groups(struct rdma_id_private *id_priv) 881 { 882 struct cma_multicast *mc; 883 884 while (!list_empty(&id_priv->mc_list)) { 885 mc = container_of(id_priv->mc_list.next, 886 struct cma_multicast, list); 887 list_del(&mc->list); 888 switch (rdma_port_get_link_layer(id_priv->cma_dev->device, id_priv->id.port_num)) { 889 case IB_LINK_LAYER_INFINIBAND: 890 ib_sa_free_multicast(mc->multicast.ib); 891 kfree(mc); 892 break; 893 case IB_LINK_LAYER_ETHERNET: 894 kref_put(&mc->mcref, release_mc); 895 break; 896 default: 897 break; 898 } 899 } 900 } 901 902 void rdma_destroy_id(struct rdma_cm_id *id) 903 { 904 struct rdma_id_private *id_priv; 905 enum cma_state state; 906 907 id_priv = container_of(id, struct rdma_id_private, id); 908 state = cma_exch(id_priv, CMA_DESTROYING); 909 cma_cancel_operation(id_priv, state); 910 911 /* 912 * Wait for any active callback to finish. New callbacks will find 913 * the id_priv state set to destroying and abort. 914 */ 915 mutex_lock(&id_priv->handler_mutex); 916 mutex_unlock(&id_priv->handler_mutex); 917 918 if (id_priv->cma_dev) { 919 switch (rdma_node_get_transport(id_priv->id.device->node_type)) { 920 case RDMA_TRANSPORT_IB: 921 if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib)) 922 ib_destroy_cm_id(id_priv->cm_id.ib); 923 break; 924 case RDMA_TRANSPORT_IWARP: 925 if (id_priv->cm_id.iw && !IS_ERR(id_priv->cm_id.iw)) 926 iw_destroy_cm_id(id_priv->cm_id.iw); 927 break; 928 default: 929 break; 930 } 931 cma_leave_mc_groups(id_priv); 932 cma_release_dev(id_priv); 933 } 934 935 cma_release_port(id_priv); 936 cma_deref_id(id_priv); 937 wait_for_completion(&id_priv->comp); 938 939 if (id_priv->internal_id) 940 cma_deref_id(id_priv->id.context); 941 942 kfree(id_priv->id.route.path_rec); 943 kfree(id_priv); 944 } 945 EXPORT_SYMBOL(rdma_destroy_id); 946 947 static int cma_rep_recv(struct rdma_id_private *id_priv) 948 { 949 int ret; 950 951 ret = cma_modify_qp_rtr(id_priv, NULL); 952 if (ret) 953 goto reject; 954 955 ret = cma_modify_qp_rts(id_priv, NULL); 956 if (ret) 957 goto reject; 958 959 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0); 960 if (ret) 961 goto reject; 962 963 return 0; 964 reject: 965 cma_modify_qp_err(id_priv); 966 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED, 967 NULL, 0, NULL, 0); 968 return ret; 969 } 970 971 static int cma_verify_rep(struct rdma_id_private *id_priv, void *data) 972 { 973 if (id_priv->id.ps == RDMA_PS_SDP && 974 sdp_get_majv(((struct sdp_hah *) data)->sdp_version) != 975 SDP_MAJ_VERSION) 976 return -EINVAL; 977 978 return 0; 979 } 980 981 static void cma_set_rep_event_data(struct rdma_cm_event *event, 982 struct ib_cm_rep_event_param *rep_data, 983 void *private_data) 984 { 985 event->param.conn.private_data = private_data; 986 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE; 987 event->param.conn.responder_resources = rep_data->responder_resources; 988 event->param.conn.initiator_depth = rep_data->initiator_depth; 989 event->param.conn.flow_control = rep_data->flow_control; 990 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count; 991 event->param.conn.srq = rep_data->srq; 992 event->param.conn.qp_num = rep_data->remote_qpn; 993 } 994 995 static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) 996 { 997 struct rdma_id_private *id_priv = cm_id->context; 998 struct rdma_cm_event event; 999 int ret = 0; 1000 1001 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT && 1002 cma_disable_callback(id_priv, CMA_CONNECT)) || 1003 (ib_event->event == IB_CM_TIMEWAIT_EXIT && 1004 cma_disable_callback(id_priv, CMA_DISCONNECT))) 1005 return 0; 1006 1007 memset(&event, 0, sizeof event); 1008 switch (ib_event->event) { 1009 case IB_CM_REQ_ERROR: 1010 case IB_CM_REP_ERROR: 1011 event.event = RDMA_CM_EVENT_UNREACHABLE; 1012 event.status = -ETIMEDOUT; 1013 break; 1014 case IB_CM_REP_RECEIVED: 1015 event.status = cma_verify_rep(id_priv, ib_event->private_data); 1016 if (event.status) 1017 event.event = RDMA_CM_EVENT_CONNECT_ERROR; 1018 else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) { 1019 event.status = cma_rep_recv(id_priv); 1020 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR : 1021 RDMA_CM_EVENT_ESTABLISHED; 1022 } else 1023 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE; 1024 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd, 1025 ib_event->private_data); 1026 break; 1027 case IB_CM_RTU_RECEIVED: 1028 case IB_CM_USER_ESTABLISHED: 1029 event.event = RDMA_CM_EVENT_ESTABLISHED; 1030 break; 1031 case IB_CM_DREQ_ERROR: 1032 event.status = -ETIMEDOUT; /* fall through */ 1033 case IB_CM_DREQ_RECEIVED: 1034 case IB_CM_DREP_RECEIVED: 1035 if (!cma_comp_exch(id_priv, CMA_CONNECT, CMA_DISCONNECT)) 1036 goto out; 1037 event.event = RDMA_CM_EVENT_DISCONNECTED; 1038 break; 1039 case IB_CM_TIMEWAIT_EXIT: 1040 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT; 1041 break; 1042 case IB_CM_MRA_RECEIVED: 1043 /* ignore event */ 1044 goto out; 1045 case IB_CM_REJ_RECEIVED: 1046 cma_modify_qp_err(id_priv); 1047 event.status = ib_event->param.rej_rcvd.reason; 1048 event.event = RDMA_CM_EVENT_REJECTED; 1049 event.param.conn.private_data = ib_event->private_data; 1050 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE; 1051 break; 1052 default: 1053 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n", 1054 ib_event->event); 1055 goto out; 1056 } 1057 1058 ret = id_priv->id.event_handler(&id_priv->id, &event); 1059 if (ret) { 1060 /* Destroy the CM ID by returning a non-zero value. */ 1061 id_priv->cm_id.ib = NULL; 1062 cma_exch(id_priv, CMA_DESTROYING); 1063 mutex_unlock(&id_priv->handler_mutex); 1064 rdma_destroy_id(&id_priv->id); 1065 return ret; 1066 } 1067 out: 1068 mutex_unlock(&id_priv->handler_mutex); 1069 return ret; 1070 } 1071 1072 static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id, 1073 struct ib_cm_event *ib_event) 1074 { 1075 struct rdma_id_private *id_priv; 1076 struct rdma_cm_id *id; 1077 struct rdma_route *rt; 1078 union cma_ip_addr *src, *dst; 1079 __be16 port; 1080 u8 ip_ver; 1081 int ret; 1082 1083 if (cma_get_net_info(ib_event->private_data, listen_id->ps, 1084 &ip_ver, &port, &src, &dst)) 1085 goto err; 1086 1087 id = rdma_create_id(listen_id->event_handler, listen_id->context, 1088 listen_id->ps); 1089 if (IS_ERR(id)) 1090 goto err; 1091 1092 cma_save_net_info(&id->route.addr, &listen_id->route.addr, 1093 ip_ver, port, src, dst); 1094 1095 rt = &id->route; 1096 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1; 1097 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths, 1098 GFP_KERNEL); 1099 if (!rt->path_rec) 1100 goto destroy_id; 1101 1102 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path; 1103 if (rt->num_paths == 2) 1104 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path; 1105 1106 if (cma_any_addr((struct sockaddr *) &rt->addr.src_addr)) { 1107 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND; 1108 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid); 1109 ib_addr_set_pkey(&rt->addr.dev_addr, rt->path_rec[0].pkey); 1110 } else { 1111 ret = rdma_translate_ip((struct sockaddr *) &rt->addr.src_addr, 1112 &rt->addr.dev_addr); 1113 if (ret) 1114 goto destroy_id; 1115 } 1116 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid); 1117 1118 id_priv = container_of(id, struct rdma_id_private, id); 1119 id_priv->state = CMA_CONNECT; 1120 return id_priv; 1121 1122 destroy_id: 1123 rdma_destroy_id(id); 1124 err: 1125 return NULL; 1126 } 1127 1128 static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id, 1129 struct ib_cm_event *ib_event) 1130 { 1131 struct rdma_id_private *id_priv; 1132 struct rdma_cm_id *id; 1133 union cma_ip_addr *src, *dst; 1134 __be16 port; 1135 u8 ip_ver; 1136 int ret; 1137 1138 id = rdma_create_id(listen_id->event_handler, listen_id->context, 1139 listen_id->ps); 1140 if (IS_ERR(id)) 1141 return NULL; 1142 1143 1144 if (cma_get_net_info(ib_event->private_data, listen_id->ps, 1145 &ip_ver, &port, &src, &dst)) 1146 goto err; 1147 1148 cma_save_net_info(&id->route.addr, &listen_id->route.addr, 1149 ip_ver, port, src, dst); 1150 1151 if (!cma_any_addr((struct sockaddr *) &id->route.addr.src_addr)) { 1152 ret = rdma_translate_ip((struct sockaddr *) &id->route.addr.src_addr, 1153 &id->route.addr.dev_addr); 1154 if (ret) 1155 goto err; 1156 } 1157 1158 id_priv = container_of(id, struct rdma_id_private, id); 1159 id_priv->state = CMA_CONNECT; 1160 return id_priv; 1161 err: 1162 rdma_destroy_id(id); 1163 return NULL; 1164 } 1165 1166 static void cma_set_req_event_data(struct rdma_cm_event *event, 1167 struct ib_cm_req_event_param *req_data, 1168 void *private_data, int offset) 1169 { 1170 event->param.conn.private_data = private_data + offset; 1171 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset; 1172 event->param.conn.responder_resources = req_data->responder_resources; 1173 event->param.conn.initiator_depth = req_data->initiator_depth; 1174 event->param.conn.flow_control = req_data->flow_control; 1175 event->param.conn.retry_count = req_data->retry_count; 1176 event->param.conn.rnr_retry_count = req_data->rnr_retry_count; 1177 event->param.conn.srq = req_data->srq; 1178 event->param.conn.qp_num = req_data->remote_qpn; 1179 } 1180 1181 static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) 1182 { 1183 struct rdma_id_private *listen_id, *conn_id; 1184 struct rdma_cm_event event; 1185 int offset, ret; 1186 1187 listen_id = cm_id->context; 1188 if (cma_disable_callback(listen_id, CMA_LISTEN)) 1189 return -ECONNABORTED; 1190 1191 memset(&event, 0, sizeof event); 1192 offset = cma_user_data_offset(listen_id->id.ps); 1193 event.event = RDMA_CM_EVENT_CONNECT_REQUEST; 1194 if (cma_is_ud_ps(listen_id->id.ps)) { 1195 conn_id = cma_new_udp_id(&listen_id->id, ib_event); 1196 event.param.ud.private_data = ib_event->private_data + offset; 1197 event.param.ud.private_data_len = 1198 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset; 1199 } else { 1200 conn_id = cma_new_conn_id(&listen_id->id, ib_event); 1201 cma_set_req_event_data(&event, &ib_event->param.req_rcvd, 1202 ib_event->private_data, offset); 1203 } 1204 if (!conn_id) { 1205 ret = -ENOMEM; 1206 goto out; 1207 } 1208 1209 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING); 1210 ret = cma_acquire_dev(conn_id); 1211 if (ret) 1212 goto release_conn_id; 1213 1214 conn_id->cm_id.ib = cm_id; 1215 cm_id->context = conn_id; 1216 cm_id->cm_handler = cma_ib_handler; 1217 1218 /* 1219 * Protect against the user destroying conn_id from another thread 1220 * until we're done accessing it. 1221 */ 1222 atomic_inc(&conn_id->refcount); 1223 ret = conn_id->id.event_handler(&conn_id->id, &event); 1224 if (!ret) { 1225 /* 1226 * Acquire mutex to prevent user executing rdma_destroy_id() 1227 * while we're accessing the cm_id. 1228 */ 1229 mutex_lock(&lock); 1230 if (cma_comp(conn_id, CMA_CONNECT) && 1231 !cma_is_ud_ps(conn_id->id.ps)) 1232 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0); 1233 mutex_unlock(&lock); 1234 mutex_unlock(&conn_id->handler_mutex); 1235 cma_deref_id(conn_id); 1236 goto out; 1237 } 1238 cma_deref_id(conn_id); 1239 1240 /* Destroy the CM ID by returning a non-zero value. */ 1241 conn_id->cm_id.ib = NULL; 1242 1243 release_conn_id: 1244 cma_exch(conn_id, CMA_DESTROYING); 1245 mutex_unlock(&conn_id->handler_mutex); 1246 rdma_destroy_id(&conn_id->id); 1247 1248 out: 1249 mutex_unlock(&listen_id->handler_mutex); 1250 return ret; 1251 } 1252 1253 static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr) 1254 { 1255 return cpu_to_be64(((u64)ps << 16) + be16_to_cpu(cma_port(addr))); 1256 } 1257 1258 static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr, 1259 struct ib_cm_compare_data *compare) 1260 { 1261 struct cma_hdr *cma_data, *cma_mask; 1262 struct sdp_hh *sdp_data, *sdp_mask; 1263 __be32 ip4_addr; 1264 struct in6_addr ip6_addr; 1265 1266 memset(compare, 0, sizeof *compare); 1267 cma_data = (void *) compare->data; 1268 cma_mask = (void *) compare->mask; 1269 sdp_data = (void *) compare->data; 1270 sdp_mask = (void *) compare->mask; 1271 1272 switch (addr->sa_family) { 1273 case AF_INET: 1274 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr; 1275 if (ps == RDMA_PS_SDP) { 1276 sdp_set_ip_ver(sdp_data, 4); 1277 sdp_set_ip_ver(sdp_mask, 0xF); 1278 sdp_data->dst_addr.ip4.addr = ip4_addr; 1279 sdp_mask->dst_addr.ip4.addr = htonl(~0); 1280 } else { 1281 cma_set_ip_ver(cma_data, 4); 1282 cma_set_ip_ver(cma_mask, 0xF); 1283 cma_data->dst_addr.ip4.addr = ip4_addr; 1284 cma_mask->dst_addr.ip4.addr = htonl(~0); 1285 } 1286 break; 1287 case AF_INET6: 1288 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr; 1289 if (ps == RDMA_PS_SDP) { 1290 sdp_set_ip_ver(sdp_data, 6); 1291 sdp_set_ip_ver(sdp_mask, 0xF); 1292 sdp_data->dst_addr.ip6 = ip6_addr; 1293 memset(&sdp_mask->dst_addr.ip6, 0xFF, 1294 sizeof sdp_mask->dst_addr.ip6); 1295 } else { 1296 cma_set_ip_ver(cma_data, 6); 1297 cma_set_ip_ver(cma_mask, 0xF); 1298 cma_data->dst_addr.ip6 = ip6_addr; 1299 memset(&cma_mask->dst_addr.ip6, 0xFF, 1300 sizeof cma_mask->dst_addr.ip6); 1301 } 1302 break; 1303 default: 1304 break; 1305 } 1306 } 1307 1308 static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event) 1309 { 1310 struct rdma_id_private *id_priv = iw_id->context; 1311 struct rdma_cm_event event; 1312 struct sockaddr_in *sin; 1313 int ret = 0; 1314 1315 if (cma_disable_callback(id_priv, CMA_CONNECT)) 1316 return 0; 1317 1318 memset(&event, 0, sizeof event); 1319 switch (iw_event->event) { 1320 case IW_CM_EVENT_CLOSE: 1321 event.event = RDMA_CM_EVENT_DISCONNECTED; 1322 break; 1323 case IW_CM_EVENT_CONNECT_REPLY: 1324 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; 1325 *sin = iw_event->local_addr; 1326 sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr; 1327 *sin = iw_event->remote_addr; 1328 switch (iw_event->status) { 1329 case 0: 1330 event.event = RDMA_CM_EVENT_ESTABLISHED; 1331 break; 1332 case -ECONNRESET: 1333 case -ECONNREFUSED: 1334 event.event = RDMA_CM_EVENT_REJECTED; 1335 break; 1336 case -ETIMEDOUT: 1337 event.event = RDMA_CM_EVENT_UNREACHABLE; 1338 break; 1339 default: 1340 event.event = RDMA_CM_EVENT_CONNECT_ERROR; 1341 break; 1342 } 1343 break; 1344 case IW_CM_EVENT_ESTABLISHED: 1345 event.event = RDMA_CM_EVENT_ESTABLISHED; 1346 break; 1347 default: 1348 BUG_ON(1); 1349 } 1350 1351 event.status = iw_event->status; 1352 event.param.conn.private_data = iw_event->private_data; 1353 event.param.conn.private_data_len = iw_event->private_data_len; 1354 ret = id_priv->id.event_handler(&id_priv->id, &event); 1355 if (ret) { 1356 /* Destroy the CM ID by returning a non-zero value. */ 1357 id_priv->cm_id.iw = NULL; 1358 cma_exch(id_priv, CMA_DESTROYING); 1359 mutex_unlock(&id_priv->handler_mutex); 1360 rdma_destroy_id(&id_priv->id); 1361 return ret; 1362 } 1363 1364 mutex_unlock(&id_priv->handler_mutex); 1365 return ret; 1366 } 1367 1368 static int iw_conn_req_handler(struct iw_cm_id *cm_id, 1369 struct iw_cm_event *iw_event) 1370 { 1371 struct rdma_cm_id *new_cm_id; 1372 struct rdma_id_private *listen_id, *conn_id; 1373 struct sockaddr_in *sin; 1374 struct net_device *dev = NULL; 1375 struct rdma_cm_event event; 1376 int ret; 1377 struct ib_device_attr attr; 1378 1379 listen_id = cm_id->context; 1380 if (cma_disable_callback(listen_id, CMA_LISTEN)) 1381 return -ECONNABORTED; 1382 1383 /* Create a new RDMA id for the new IW CM ID */ 1384 new_cm_id = rdma_create_id(listen_id->id.event_handler, 1385 listen_id->id.context, 1386 RDMA_PS_TCP); 1387 if (IS_ERR(new_cm_id)) { 1388 ret = -ENOMEM; 1389 goto out; 1390 } 1391 conn_id = container_of(new_cm_id, struct rdma_id_private, id); 1392 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING); 1393 conn_id->state = CMA_CONNECT; 1394 1395 dev = ip_dev_find(&init_net, iw_event->local_addr.sin_addr.s_addr); 1396 if (!dev) { 1397 ret = -EADDRNOTAVAIL; 1398 mutex_unlock(&conn_id->handler_mutex); 1399 rdma_destroy_id(new_cm_id); 1400 goto out; 1401 } 1402 ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL); 1403 if (ret) { 1404 mutex_unlock(&conn_id->handler_mutex); 1405 rdma_destroy_id(new_cm_id); 1406 goto out; 1407 } 1408 1409 ret = cma_acquire_dev(conn_id); 1410 if (ret) { 1411 mutex_unlock(&conn_id->handler_mutex); 1412 rdma_destroy_id(new_cm_id); 1413 goto out; 1414 } 1415 1416 conn_id->cm_id.iw = cm_id; 1417 cm_id->context = conn_id; 1418 cm_id->cm_handler = cma_iw_handler; 1419 1420 sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr; 1421 *sin = iw_event->local_addr; 1422 sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr; 1423 *sin = iw_event->remote_addr; 1424 1425 ret = ib_query_device(conn_id->id.device, &attr); 1426 if (ret) { 1427 mutex_unlock(&conn_id->handler_mutex); 1428 rdma_destroy_id(new_cm_id); 1429 goto out; 1430 } 1431 1432 memset(&event, 0, sizeof event); 1433 event.event = RDMA_CM_EVENT_CONNECT_REQUEST; 1434 event.param.conn.private_data = iw_event->private_data; 1435 event.param.conn.private_data_len = iw_event->private_data_len; 1436 event.param.conn.initiator_depth = attr.max_qp_init_rd_atom; 1437 event.param.conn.responder_resources = attr.max_qp_rd_atom; 1438 1439 /* 1440 * Protect against the user destroying conn_id from another thread 1441 * until we're done accessing it. 1442 */ 1443 atomic_inc(&conn_id->refcount); 1444 ret = conn_id->id.event_handler(&conn_id->id, &event); 1445 if (ret) { 1446 /* User wants to destroy the CM ID */ 1447 conn_id->cm_id.iw = NULL; 1448 cma_exch(conn_id, CMA_DESTROYING); 1449 mutex_unlock(&conn_id->handler_mutex); 1450 cma_deref_id(conn_id); 1451 rdma_destroy_id(&conn_id->id); 1452 goto out; 1453 } 1454 1455 mutex_unlock(&conn_id->handler_mutex); 1456 cma_deref_id(conn_id); 1457 1458 out: 1459 if (dev) 1460 dev_put(dev); 1461 mutex_unlock(&listen_id->handler_mutex); 1462 return ret; 1463 } 1464 1465 static int cma_ib_listen(struct rdma_id_private *id_priv) 1466 { 1467 struct ib_cm_compare_data compare_data; 1468 struct sockaddr *addr; 1469 __be64 svc_id; 1470 int ret; 1471 1472 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_req_handler, 1473 id_priv); 1474 if (IS_ERR(id_priv->cm_id.ib)) 1475 return PTR_ERR(id_priv->cm_id.ib); 1476 1477 addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr; 1478 svc_id = cma_get_service_id(id_priv->id.ps, addr); 1479 if (cma_any_addr(addr)) 1480 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL); 1481 else { 1482 cma_set_compare_data(id_priv->id.ps, addr, &compare_data); 1483 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data); 1484 } 1485 1486 if (ret) { 1487 ib_destroy_cm_id(id_priv->cm_id.ib); 1488 id_priv->cm_id.ib = NULL; 1489 } 1490 1491 return ret; 1492 } 1493 1494 static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog) 1495 { 1496 int ret; 1497 struct sockaddr_in *sin; 1498 1499 id_priv->cm_id.iw = iw_create_cm_id(id_priv->id.device, 1500 iw_conn_req_handler, 1501 id_priv); 1502 if (IS_ERR(id_priv->cm_id.iw)) 1503 return PTR_ERR(id_priv->cm_id.iw); 1504 1505 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; 1506 id_priv->cm_id.iw->local_addr = *sin; 1507 1508 ret = iw_cm_listen(id_priv->cm_id.iw, backlog); 1509 1510 if (ret) { 1511 iw_destroy_cm_id(id_priv->cm_id.iw); 1512 id_priv->cm_id.iw = NULL; 1513 } 1514 1515 return ret; 1516 } 1517 1518 static int cma_listen_handler(struct rdma_cm_id *id, 1519 struct rdma_cm_event *event) 1520 { 1521 struct rdma_id_private *id_priv = id->context; 1522 1523 id->context = id_priv->id.context; 1524 id->event_handler = id_priv->id.event_handler; 1525 return id_priv->id.event_handler(id, event); 1526 } 1527 1528 static void cma_listen_on_dev(struct rdma_id_private *id_priv, 1529 struct cma_device *cma_dev) 1530 { 1531 struct rdma_id_private *dev_id_priv; 1532 struct rdma_cm_id *id; 1533 int ret; 1534 1535 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps); 1536 if (IS_ERR(id)) 1537 return; 1538 1539 dev_id_priv = container_of(id, struct rdma_id_private, id); 1540 1541 dev_id_priv->state = CMA_ADDR_BOUND; 1542 memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr, 1543 ip_addr_size((struct sockaddr *) &id_priv->id.route.addr.src_addr)); 1544 1545 cma_attach_to_dev(dev_id_priv, cma_dev); 1546 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list); 1547 atomic_inc(&id_priv->refcount); 1548 dev_id_priv->internal_id = 1; 1549 1550 ret = rdma_listen(id, id_priv->backlog); 1551 if (ret) 1552 printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, " 1553 "listening on device %s\n", ret, cma_dev->device->name); 1554 } 1555 1556 static void cma_listen_on_all(struct rdma_id_private *id_priv) 1557 { 1558 struct cma_device *cma_dev; 1559 1560 mutex_lock(&lock); 1561 list_add_tail(&id_priv->list, &listen_any_list); 1562 list_for_each_entry(cma_dev, &dev_list, list) 1563 cma_listen_on_dev(id_priv, cma_dev); 1564 mutex_unlock(&lock); 1565 } 1566 1567 int rdma_listen(struct rdma_cm_id *id, int backlog) 1568 { 1569 struct rdma_id_private *id_priv; 1570 int ret; 1571 1572 id_priv = container_of(id, struct rdma_id_private, id); 1573 if (id_priv->state == CMA_IDLE) { 1574 ((struct sockaddr *) &id->route.addr.src_addr)->sa_family = AF_INET; 1575 ret = rdma_bind_addr(id, (struct sockaddr *) &id->route.addr.src_addr); 1576 if (ret) 1577 return ret; 1578 } 1579 1580 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_LISTEN)) 1581 return -EINVAL; 1582 1583 id_priv->backlog = backlog; 1584 if (id->device) { 1585 switch (rdma_node_get_transport(id->device->node_type)) { 1586 case RDMA_TRANSPORT_IB: 1587 ret = cma_ib_listen(id_priv); 1588 if (ret) 1589 goto err; 1590 break; 1591 case RDMA_TRANSPORT_IWARP: 1592 ret = cma_iw_listen(id_priv, backlog); 1593 if (ret) 1594 goto err; 1595 break; 1596 default: 1597 ret = -ENOSYS; 1598 goto err; 1599 } 1600 } else 1601 cma_listen_on_all(id_priv); 1602 1603 return 0; 1604 err: 1605 id_priv->backlog = 0; 1606 cma_comp_exch(id_priv, CMA_LISTEN, CMA_ADDR_BOUND); 1607 return ret; 1608 } 1609 EXPORT_SYMBOL(rdma_listen); 1610 1611 void rdma_set_service_type(struct rdma_cm_id *id, int tos) 1612 { 1613 struct rdma_id_private *id_priv; 1614 1615 id_priv = container_of(id, struct rdma_id_private, id); 1616 id_priv->tos = (u8) tos; 1617 } 1618 EXPORT_SYMBOL(rdma_set_service_type); 1619 1620 static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec, 1621 void *context) 1622 { 1623 struct cma_work *work = context; 1624 struct rdma_route *route; 1625 1626 route = &work->id->id.route; 1627 1628 if (!status) { 1629 route->num_paths = 1; 1630 *route->path_rec = *path_rec; 1631 } else { 1632 work->old_state = CMA_ROUTE_QUERY; 1633 work->new_state = CMA_ADDR_RESOLVED; 1634 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR; 1635 work->event.status = status; 1636 } 1637 1638 queue_work(cma_wq, &work->work); 1639 } 1640 1641 static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms, 1642 struct cma_work *work) 1643 { 1644 struct rdma_addr *addr = &id_priv->id.route.addr; 1645 struct ib_sa_path_rec path_rec; 1646 ib_sa_comp_mask comp_mask; 1647 struct sockaddr_in6 *sin6; 1648 1649 memset(&path_rec, 0, sizeof path_rec); 1650 rdma_addr_get_sgid(&addr->dev_addr, &path_rec.sgid); 1651 rdma_addr_get_dgid(&addr->dev_addr, &path_rec.dgid); 1652 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(&addr->dev_addr)); 1653 path_rec.numb_path = 1; 1654 path_rec.reversible = 1; 1655 path_rec.service_id = cma_get_service_id(id_priv->id.ps, 1656 (struct sockaddr *) &addr->dst_addr); 1657 1658 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID | 1659 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH | 1660 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID; 1661 1662 if (addr->src_addr.ss_family == AF_INET) { 1663 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos); 1664 comp_mask |= IB_SA_PATH_REC_QOS_CLASS; 1665 } else { 1666 sin6 = (struct sockaddr_in6 *) &addr->src_addr; 1667 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20); 1668 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS; 1669 } 1670 1671 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device, 1672 id_priv->id.port_num, &path_rec, 1673 comp_mask, timeout_ms, 1674 GFP_KERNEL, cma_query_handler, 1675 work, &id_priv->query); 1676 1677 return (id_priv->query_id < 0) ? id_priv->query_id : 0; 1678 } 1679 1680 static void cma_work_handler(struct work_struct *_work) 1681 { 1682 struct cma_work *work = container_of(_work, struct cma_work, work); 1683 struct rdma_id_private *id_priv = work->id; 1684 int destroy = 0; 1685 1686 mutex_lock(&id_priv->handler_mutex); 1687 if (!cma_comp_exch(id_priv, work->old_state, work->new_state)) 1688 goto out; 1689 1690 if (id_priv->id.event_handler(&id_priv->id, &work->event)) { 1691 cma_exch(id_priv, CMA_DESTROYING); 1692 destroy = 1; 1693 } 1694 out: 1695 mutex_unlock(&id_priv->handler_mutex); 1696 cma_deref_id(id_priv); 1697 if (destroy) 1698 rdma_destroy_id(&id_priv->id); 1699 kfree(work); 1700 } 1701 1702 static void cma_ndev_work_handler(struct work_struct *_work) 1703 { 1704 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work); 1705 struct rdma_id_private *id_priv = work->id; 1706 int destroy = 0; 1707 1708 mutex_lock(&id_priv->handler_mutex); 1709 if (id_priv->state == CMA_DESTROYING || 1710 id_priv->state == CMA_DEVICE_REMOVAL) 1711 goto out; 1712 1713 if (id_priv->id.event_handler(&id_priv->id, &work->event)) { 1714 cma_exch(id_priv, CMA_DESTROYING); 1715 destroy = 1; 1716 } 1717 1718 out: 1719 mutex_unlock(&id_priv->handler_mutex); 1720 cma_deref_id(id_priv); 1721 if (destroy) 1722 rdma_destroy_id(&id_priv->id); 1723 kfree(work); 1724 } 1725 1726 static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms) 1727 { 1728 struct rdma_route *route = &id_priv->id.route; 1729 struct cma_work *work; 1730 int ret; 1731 1732 work = kzalloc(sizeof *work, GFP_KERNEL); 1733 if (!work) 1734 return -ENOMEM; 1735 1736 work->id = id_priv; 1737 INIT_WORK(&work->work, cma_work_handler); 1738 work->old_state = CMA_ROUTE_QUERY; 1739 work->new_state = CMA_ROUTE_RESOLVED; 1740 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 1741 1742 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL); 1743 if (!route->path_rec) { 1744 ret = -ENOMEM; 1745 goto err1; 1746 } 1747 1748 ret = cma_query_ib_route(id_priv, timeout_ms, work); 1749 if (ret) 1750 goto err2; 1751 1752 return 0; 1753 err2: 1754 kfree(route->path_rec); 1755 route->path_rec = NULL; 1756 err1: 1757 kfree(work); 1758 return ret; 1759 } 1760 1761 int rdma_set_ib_paths(struct rdma_cm_id *id, 1762 struct ib_sa_path_rec *path_rec, int num_paths) 1763 { 1764 struct rdma_id_private *id_priv; 1765 int ret; 1766 1767 id_priv = container_of(id, struct rdma_id_private, id); 1768 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_RESOLVED)) 1769 return -EINVAL; 1770 1771 id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths, 1772 GFP_KERNEL); 1773 if (!id->route.path_rec) { 1774 ret = -ENOMEM; 1775 goto err; 1776 } 1777 1778 id->route.num_paths = num_paths; 1779 return 0; 1780 err: 1781 cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_ADDR_RESOLVED); 1782 return ret; 1783 } 1784 EXPORT_SYMBOL(rdma_set_ib_paths); 1785 1786 static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms) 1787 { 1788 struct cma_work *work; 1789 1790 work = kzalloc(sizeof *work, GFP_KERNEL); 1791 if (!work) 1792 return -ENOMEM; 1793 1794 work->id = id_priv; 1795 INIT_WORK(&work->work, cma_work_handler); 1796 work->old_state = CMA_ROUTE_QUERY; 1797 work->new_state = CMA_ROUTE_RESOLVED; 1798 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 1799 queue_work(cma_wq, &work->work); 1800 return 0; 1801 } 1802 1803 static int cma_resolve_iboe_route(struct rdma_id_private *id_priv) 1804 { 1805 struct rdma_route *route = &id_priv->id.route; 1806 struct rdma_addr *addr = &route->addr; 1807 struct cma_work *work; 1808 int ret; 1809 struct sockaddr_in *src_addr = (struct sockaddr_in *)&route->addr.src_addr; 1810 struct sockaddr_in *dst_addr = (struct sockaddr_in *)&route->addr.dst_addr; 1811 struct net_device *ndev = NULL; 1812 u16 vid; 1813 1814 if (src_addr->sin_family != dst_addr->sin_family) 1815 return -EINVAL; 1816 1817 work = kzalloc(sizeof *work, GFP_KERNEL); 1818 if (!work) 1819 return -ENOMEM; 1820 1821 work->id = id_priv; 1822 INIT_WORK(&work->work, cma_work_handler); 1823 1824 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL); 1825 if (!route->path_rec) { 1826 ret = -ENOMEM; 1827 goto err1; 1828 } 1829 1830 route->num_paths = 1; 1831 1832 if (addr->dev_addr.bound_dev_if) 1833 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if); 1834 if (!ndev) { 1835 ret = -ENODEV; 1836 goto err2; 1837 } 1838 1839 vid = rdma_vlan_dev_vlan_id(ndev); 1840 1841 iboe_mac_vlan_to_ll(&route->path_rec->sgid, addr->dev_addr.src_dev_addr, vid); 1842 iboe_mac_vlan_to_ll(&route->path_rec->dgid, addr->dev_addr.dst_dev_addr, vid); 1843 1844 route->path_rec->hop_limit = 1; 1845 route->path_rec->reversible = 1; 1846 route->path_rec->pkey = cpu_to_be16(0xffff); 1847 route->path_rec->mtu_selector = IB_SA_EQ; 1848 route->path_rec->sl = id_priv->tos >> 5; 1849 1850 route->path_rec->mtu = iboe_get_mtu(ndev->mtu); 1851 route->path_rec->rate_selector = IB_SA_EQ; 1852 route->path_rec->rate = iboe_get_rate(ndev); 1853 dev_put(ndev); 1854 route->path_rec->packet_life_time_selector = IB_SA_EQ; 1855 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME; 1856 if (!route->path_rec->mtu) { 1857 ret = -EINVAL; 1858 goto err2; 1859 } 1860 1861 work->old_state = CMA_ROUTE_QUERY; 1862 work->new_state = CMA_ROUTE_RESOLVED; 1863 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 1864 work->event.status = 0; 1865 1866 queue_work(cma_wq, &work->work); 1867 1868 return 0; 1869 1870 err2: 1871 kfree(route->path_rec); 1872 route->path_rec = NULL; 1873 err1: 1874 kfree(work); 1875 return ret; 1876 } 1877 1878 int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms) 1879 { 1880 struct rdma_id_private *id_priv; 1881 int ret; 1882 1883 id_priv = container_of(id, struct rdma_id_private, id); 1884 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_QUERY)) 1885 return -EINVAL; 1886 1887 atomic_inc(&id_priv->refcount); 1888 switch (rdma_node_get_transport(id->device->node_type)) { 1889 case RDMA_TRANSPORT_IB: 1890 switch (rdma_port_get_link_layer(id->device, id->port_num)) { 1891 case IB_LINK_LAYER_INFINIBAND: 1892 ret = cma_resolve_ib_route(id_priv, timeout_ms); 1893 break; 1894 case IB_LINK_LAYER_ETHERNET: 1895 ret = cma_resolve_iboe_route(id_priv); 1896 break; 1897 default: 1898 ret = -ENOSYS; 1899 } 1900 break; 1901 case RDMA_TRANSPORT_IWARP: 1902 ret = cma_resolve_iw_route(id_priv, timeout_ms); 1903 break; 1904 default: 1905 ret = -ENOSYS; 1906 break; 1907 } 1908 if (ret) 1909 goto err; 1910 1911 return 0; 1912 err: 1913 cma_comp_exch(id_priv, CMA_ROUTE_QUERY, CMA_ADDR_RESOLVED); 1914 cma_deref_id(id_priv); 1915 return ret; 1916 } 1917 EXPORT_SYMBOL(rdma_resolve_route); 1918 1919 static int cma_bind_loopback(struct rdma_id_private *id_priv) 1920 { 1921 struct cma_device *cma_dev; 1922 struct ib_port_attr port_attr; 1923 union ib_gid gid; 1924 u16 pkey; 1925 int ret; 1926 u8 p; 1927 1928 mutex_lock(&lock); 1929 if (list_empty(&dev_list)) { 1930 ret = -ENODEV; 1931 goto out; 1932 } 1933 list_for_each_entry(cma_dev, &dev_list, list) 1934 for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p) 1935 if (!ib_query_port(cma_dev->device, p, &port_attr) && 1936 port_attr.state == IB_PORT_ACTIVE) 1937 goto port_found; 1938 1939 p = 1; 1940 cma_dev = list_entry(dev_list.next, struct cma_device, list); 1941 1942 port_found: 1943 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid); 1944 if (ret) 1945 goto out; 1946 1947 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey); 1948 if (ret) 1949 goto out; 1950 1951 id_priv->id.route.addr.dev_addr.dev_type = 1952 (rdma_port_get_link_layer(cma_dev->device, p) == IB_LINK_LAYER_INFINIBAND) ? 1953 ARPHRD_INFINIBAND : ARPHRD_ETHER; 1954 1955 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid); 1956 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey); 1957 id_priv->id.port_num = p; 1958 cma_attach_to_dev(id_priv, cma_dev); 1959 out: 1960 mutex_unlock(&lock); 1961 return ret; 1962 } 1963 1964 static void addr_handler(int status, struct sockaddr *src_addr, 1965 struct rdma_dev_addr *dev_addr, void *context) 1966 { 1967 struct rdma_id_private *id_priv = context; 1968 struct rdma_cm_event event; 1969 1970 memset(&event, 0, sizeof event); 1971 mutex_lock(&id_priv->handler_mutex); 1972 if (!cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_RESOLVED)) 1973 goto out; 1974 1975 if (!status && !id_priv->cma_dev) 1976 status = cma_acquire_dev(id_priv); 1977 1978 if (status) { 1979 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ADDR_BOUND)) 1980 goto out; 1981 event.event = RDMA_CM_EVENT_ADDR_ERROR; 1982 event.status = status; 1983 } else { 1984 memcpy(&id_priv->id.route.addr.src_addr, src_addr, 1985 ip_addr_size(src_addr)); 1986 event.event = RDMA_CM_EVENT_ADDR_RESOLVED; 1987 } 1988 1989 if (id_priv->id.event_handler(&id_priv->id, &event)) { 1990 cma_exch(id_priv, CMA_DESTROYING); 1991 mutex_unlock(&id_priv->handler_mutex); 1992 cma_deref_id(id_priv); 1993 rdma_destroy_id(&id_priv->id); 1994 return; 1995 } 1996 out: 1997 mutex_unlock(&id_priv->handler_mutex); 1998 cma_deref_id(id_priv); 1999 } 2000 2001 static int cma_resolve_loopback(struct rdma_id_private *id_priv) 2002 { 2003 struct cma_work *work; 2004 struct sockaddr *src, *dst; 2005 union ib_gid gid; 2006 int ret; 2007 2008 work = kzalloc(sizeof *work, GFP_KERNEL); 2009 if (!work) 2010 return -ENOMEM; 2011 2012 if (!id_priv->cma_dev) { 2013 ret = cma_bind_loopback(id_priv); 2014 if (ret) 2015 goto err; 2016 } 2017 2018 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid); 2019 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid); 2020 2021 src = (struct sockaddr *) &id_priv->id.route.addr.src_addr; 2022 if (cma_zero_addr(src)) { 2023 dst = (struct sockaddr *) &id_priv->id.route.addr.dst_addr; 2024 if ((src->sa_family = dst->sa_family) == AF_INET) { 2025 ((struct sockaddr_in *) src)->sin_addr.s_addr = 2026 ((struct sockaddr_in *) dst)->sin_addr.s_addr; 2027 } else { 2028 ipv6_addr_copy(&((struct sockaddr_in6 *) src)->sin6_addr, 2029 &((struct sockaddr_in6 *) dst)->sin6_addr); 2030 } 2031 } 2032 2033 work->id = id_priv; 2034 INIT_WORK(&work->work, cma_work_handler); 2035 work->old_state = CMA_ADDR_QUERY; 2036 work->new_state = CMA_ADDR_RESOLVED; 2037 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED; 2038 queue_work(cma_wq, &work->work); 2039 return 0; 2040 err: 2041 kfree(work); 2042 return ret; 2043 } 2044 2045 static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, 2046 struct sockaddr *dst_addr) 2047 { 2048 if (!src_addr || !src_addr->sa_family) { 2049 src_addr = (struct sockaddr *) &id->route.addr.src_addr; 2050 if ((src_addr->sa_family = dst_addr->sa_family) == AF_INET6) { 2051 ((struct sockaddr_in6 *) src_addr)->sin6_scope_id = 2052 ((struct sockaddr_in6 *) dst_addr)->sin6_scope_id; 2053 } 2054 } 2055 return rdma_bind_addr(id, src_addr); 2056 } 2057 2058 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, 2059 struct sockaddr *dst_addr, int timeout_ms) 2060 { 2061 struct rdma_id_private *id_priv; 2062 int ret; 2063 2064 id_priv = container_of(id, struct rdma_id_private, id); 2065 if (id_priv->state == CMA_IDLE) { 2066 ret = cma_bind_addr(id, src_addr, dst_addr); 2067 if (ret) 2068 return ret; 2069 } 2070 2071 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_ADDR_QUERY)) 2072 return -EINVAL; 2073 2074 atomic_inc(&id_priv->refcount); 2075 memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr)); 2076 if (cma_any_addr(dst_addr)) 2077 ret = cma_resolve_loopback(id_priv); 2078 else 2079 ret = rdma_resolve_ip(&addr_client, (struct sockaddr *) &id->route.addr.src_addr, 2080 dst_addr, &id->route.addr.dev_addr, 2081 timeout_ms, addr_handler, id_priv); 2082 if (ret) 2083 goto err; 2084 2085 return 0; 2086 err: 2087 cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_BOUND); 2088 cma_deref_id(id_priv); 2089 return ret; 2090 } 2091 EXPORT_SYMBOL(rdma_resolve_addr); 2092 2093 static void cma_bind_port(struct rdma_bind_list *bind_list, 2094 struct rdma_id_private *id_priv) 2095 { 2096 struct sockaddr_in *sin; 2097 2098 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; 2099 sin->sin_port = htons(bind_list->port); 2100 id_priv->bind_list = bind_list; 2101 hlist_add_head(&id_priv->node, &bind_list->owners); 2102 } 2103 2104 static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv, 2105 unsigned short snum) 2106 { 2107 struct rdma_bind_list *bind_list; 2108 int port, ret; 2109 2110 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL); 2111 if (!bind_list) 2112 return -ENOMEM; 2113 2114 do { 2115 ret = idr_get_new_above(ps, bind_list, snum, &port); 2116 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL)); 2117 2118 if (ret) 2119 goto err1; 2120 2121 if (port != snum) { 2122 ret = -EADDRNOTAVAIL; 2123 goto err2; 2124 } 2125 2126 bind_list->ps = ps; 2127 bind_list->port = (unsigned short) port; 2128 cma_bind_port(bind_list, id_priv); 2129 return 0; 2130 err2: 2131 idr_remove(ps, port); 2132 err1: 2133 kfree(bind_list); 2134 return ret; 2135 } 2136 2137 static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv) 2138 { 2139 static unsigned int last_used_port; 2140 int low, high, remaining; 2141 unsigned int rover; 2142 2143 inet_get_local_port_range(&low, &high); 2144 remaining = (high - low) + 1; 2145 rover = net_random() % remaining + low; 2146 retry: 2147 if (last_used_port != rover && 2148 !idr_find(ps, (unsigned short) rover)) { 2149 int ret = cma_alloc_port(ps, id_priv, rover); 2150 /* 2151 * Remember previously used port number in order to avoid 2152 * re-using same port immediately after it is closed. 2153 */ 2154 if (!ret) 2155 last_used_port = rover; 2156 if (ret != -EADDRNOTAVAIL) 2157 return ret; 2158 } 2159 if (--remaining) { 2160 rover++; 2161 if ((rover < low) || (rover > high)) 2162 rover = low; 2163 goto retry; 2164 } 2165 return -EADDRNOTAVAIL; 2166 } 2167 2168 static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv) 2169 { 2170 struct rdma_id_private *cur_id; 2171 struct sockaddr_in *sin, *cur_sin; 2172 struct rdma_bind_list *bind_list; 2173 struct hlist_node *node; 2174 unsigned short snum; 2175 2176 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; 2177 snum = ntohs(sin->sin_port); 2178 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE)) 2179 return -EACCES; 2180 2181 bind_list = idr_find(ps, snum); 2182 if (!bind_list) 2183 return cma_alloc_port(ps, id_priv, snum); 2184 2185 /* 2186 * We don't support binding to any address if anyone is bound to 2187 * a specific address on the same port. 2188 */ 2189 if (cma_any_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr)) 2190 return -EADDRNOTAVAIL; 2191 2192 hlist_for_each_entry(cur_id, node, &bind_list->owners, node) { 2193 if (cma_any_addr((struct sockaddr *) &cur_id->id.route.addr.src_addr)) 2194 return -EADDRNOTAVAIL; 2195 2196 cur_sin = (struct sockaddr_in *) &cur_id->id.route.addr.src_addr; 2197 if (sin->sin_addr.s_addr == cur_sin->sin_addr.s_addr) 2198 return -EADDRINUSE; 2199 } 2200 2201 cma_bind_port(bind_list, id_priv); 2202 return 0; 2203 } 2204 2205 static int cma_get_port(struct rdma_id_private *id_priv) 2206 { 2207 struct idr *ps; 2208 int ret; 2209 2210 switch (id_priv->id.ps) { 2211 case RDMA_PS_SDP: 2212 ps = &sdp_ps; 2213 break; 2214 case RDMA_PS_TCP: 2215 ps = &tcp_ps; 2216 break; 2217 case RDMA_PS_UDP: 2218 ps = &udp_ps; 2219 break; 2220 case RDMA_PS_IPOIB: 2221 ps = &ipoib_ps; 2222 break; 2223 default: 2224 return -EPROTONOSUPPORT; 2225 } 2226 2227 mutex_lock(&lock); 2228 if (cma_any_port((struct sockaddr *) &id_priv->id.route.addr.src_addr)) 2229 ret = cma_alloc_any_port(ps, id_priv); 2230 else 2231 ret = cma_use_port(ps, id_priv); 2232 mutex_unlock(&lock); 2233 2234 return ret; 2235 } 2236 2237 static int cma_check_linklocal(struct rdma_dev_addr *dev_addr, 2238 struct sockaddr *addr) 2239 { 2240 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 2241 struct sockaddr_in6 *sin6; 2242 2243 if (addr->sa_family != AF_INET6) 2244 return 0; 2245 2246 sin6 = (struct sockaddr_in6 *) addr; 2247 if ((ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) && 2248 !sin6->sin6_scope_id) 2249 return -EINVAL; 2250 2251 dev_addr->bound_dev_if = sin6->sin6_scope_id; 2252 #endif 2253 return 0; 2254 } 2255 2256 int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr) 2257 { 2258 struct rdma_id_private *id_priv; 2259 int ret; 2260 2261 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6) 2262 return -EAFNOSUPPORT; 2263 2264 id_priv = container_of(id, struct rdma_id_private, id); 2265 if (!cma_comp_exch(id_priv, CMA_IDLE, CMA_ADDR_BOUND)) 2266 return -EINVAL; 2267 2268 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr); 2269 if (ret) 2270 goto err1; 2271 2272 if (!cma_any_addr(addr)) { 2273 ret = rdma_translate_ip(addr, &id->route.addr.dev_addr); 2274 if (ret) 2275 goto err1; 2276 2277 ret = cma_acquire_dev(id_priv); 2278 if (ret) 2279 goto err1; 2280 } 2281 2282 memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr)); 2283 ret = cma_get_port(id_priv); 2284 if (ret) 2285 goto err2; 2286 2287 return 0; 2288 err2: 2289 if (id_priv->cma_dev) 2290 cma_release_dev(id_priv); 2291 err1: 2292 cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_IDLE); 2293 return ret; 2294 } 2295 EXPORT_SYMBOL(rdma_bind_addr); 2296 2297 static int cma_format_hdr(void *hdr, enum rdma_port_space ps, 2298 struct rdma_route *route) 2299 { 2300 struct cma_hdr *cma_hdr; 2301 struct sdp_hh *sdp_hdr; 2302 2303 if (route->addr.src_addr.ss_family == AF_INET) { 2304 struct sockaddr_in *src4, *dst4; 2305 2306 src4 = (struct sockaddr_in *) &route->addr.src_addr; 2307 dst4 = (struct sockaddr_in *) &route->addr.dst_addr; 2308 2309 switch (ps) { 2310 case RDMA_PS_SDP: 2311 sdp_hdr = hdr; 2312 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION) 2313 return -EINVAL; 2314 sdp_set_ip_ver(sdp_hdr, 4); 2315 sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; 2316 sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; 2317 sdp_hdr->port = src4->sin_port; 2318 break; 2319 default: 2320 cma_hdr = hdr; 2321 cma_hdr->cma_version = CMA_VERSION; 2322 cma_set_ip_ver(cma_hdr, 4); 2323 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; 2324 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; 2325 cma_hdr->port = src4->sin_port; 2326 break; 2327 } 2328 } else { 2329 struct sockaddr_in6 *src6, *dst6; 2330 2331 src6 = (struct sockaddr_in6 *) &route->addr.src_addr; 2332 dst6 = (struct sockaddr_in6 *) &route->addr.dst_addr; 2333 2334 switch (ps) { 2335 case RDMA_PS_SDP: 2336 sdp_hdr = hdr; 2337 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION) 2338 return -EINVAL; 2339 sdp_set_ip_ver(sdp_hdr, 6); 2340 sdp_hdr->src_addr.ip6 = src6->sin6_addr; 2341 sdp_hdr->dst_addr.ip6 = dst6->sin6_addr; 2342 sdp_hdr->port = src6->sin6_port; 2343 break; 2344 default: 2345 cma_hdr = hdr; 2346 cma_hdr->cma_version = CMA_VERSION; 2347 cma_set_ip_ver(cma_hdr, 6); 2348 cma_hdr->src_addr.ip6 = src6->sin6_addr; 2349 cma_hdr->dst_addr.ip6 = dst6->sin6_addr; 2350 cma_hdr->port = src6->sin6_port; 2351 break; 2352 } 2353 } 2354 return 0; 2355 } 2356 2357 static int cma_sidr_rep_handler(struct ib_cm_id *cm_id, 2358 struct ib_cm_event *ib_event) 2359 { 2360 struct rdma_id_private *id_priv = cm_id->context; 2361 struct rdma_cm_event event; 2362 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd; 2363 int ret = 0; 2364 2365 if (cma_disable_callback(id_priv, CMA_CONNECT)) 2366 return 0; 2367 2368 memset(&event, 0, sizeof event); 2369 switch (ib_event->event) { 2370 case IB_CM_SIDR_REQ_ERROR: 2371 event.event = RDMA_CM_EVENT_UNREACHABLE; 2372 event.status = -ETIMEDOUT; 2373 break; 2374 case IB_CM_SIDR_REP_RECEIVED: 2375 event.param.ud.private_data = ib_event->private_data; 2376 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE; 2377 if (rep->status != IB_SIDR_SUCCESS) { 2378 event.event = RDMA_CM_EVENT_UNREACHABLE; 2379 event.status = ib_event->param.sidr_rep_rcvd.status; 2380 break; 2381 } 2382 ret = cma_set_qkey(id_priv); 2383 if (ret) { 2384 event.event = RDMA_CM_EVENT_ADDR_ERROR; 2385 event.status = -EINVAL; 2386 break; 2387 } 2388 if (id_priv->qkey != rep->qkey) { 2389 event.event = RDMA_CM_EVENT_UNREACHABLE; 2390 event.status = -EINVAL; 2391 break; 2392 } 2393 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num, 2394 id_priv->id.route.path_rec, 2395 &event.param.ud.ah_attr); 2396 event.param.ud.qp_num = rep->qpn; 2397 event.param.ud.qkey = rep->qkey; 2398 event.event = RDMA_CM_EVENT_ESTABLISHED; 2399 event.status = 0; 2400 break; 2401 default: 2402 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n", 2403 ib_event->event); 2404 goto out; 2405 } 2406 2407 ret = id_priv->id.event_handler(&id_priv->id, &event); 2408 if (ret) { 2409 /* Destroy the CM ID by returning a non-zero value. */ 2410 id_priv->cm_id.ib = NULL; 2411 cma_exch(id_priv, CMA_DESTROYING); 2412 mutex_unlock(&id_priv->handler_mutex); 2413 rdma_destroy_id(&id_priv->id); 2414 return ret; 2415 } 2416 out: 2417 mutex_unlock(&id_priv->handler_mutex); 2418 return ret; 2419 } 2420 2421 static int cma_resolve_ib_udp(struct rdma_id_private *id_priv, 2422 struct rdma_conn_param *conn_param) 2423 { 2424 struct ib_cm_sidr_req_param req; 2425 struct rdma_route *route; 2426 int ret; 2427 2428 req.private_data_len = sizeof(struct cma_hdr) + 2429 conn_param->private_data_len; 2430 req.private_data = kzalloc(req.private_data_len, GFP_ATOMIC); 2431 if (!req.private_data) 2432 return -ENOMEM; 2433 2434 if (conn_param->private_data && conn_param->private_data_len) 2435 memcpy((void *) req.private_data + sizeof(struct cma_hdr), 2436 conn_param->private_data, conn_param->private_data_len); 2437 2438 route = &id_priv->id.route; 2439 ret = cma_format_hdr((void *) req.private_data, id_priv->id.ps, route); 2440 if (ret) 2441 goto out; 2442 2443 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, 2444 cma_sidr_rep_handler, id_priv); 2445 if (IS_ERR(id_priv->cm_id.ib)) { 2446 ret = PTR_ERR(id_priv->cm_id.ib); 2447 goto out; 2448 } 2449 2450 req.path = route->path_rec; 2451 req.service_id = cma_get_service_id(id_priv->id.ps, 2452 (struct sockaddr *) &route->addr.dst_addr); 2453 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8); 2454 req.max_cm_retries = CMA_MAX_CM_RETRIES; 2455 2456 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req); 2457 if (ret) { 2458 ib_destroy_cm_id(id_priv->cm_id.ib); 2459 id_priv->cm_id.ib = NULL; 2460 } 2461 out: 2462 kfree(req.private_data); 2463 return ret; 2464 } 2465 2466 static int cma_connect_ib(struct rdma_id_private *id_priv, 2467 struct rdma_conn_param *conn_param) 2468 { 2469 struct ib_cm_req_param req; 2470 struct rdma_route *route; 2471 void *private_data; 2472 int offset, ret; 2473 2474 memset(&req, 0, sizeof req); 2475 offset = cma_user_data_offset(id_priv->id.ps); 2476 req.private_data_len = offset + conn_param->private_data_len; 2477 private_data = kzalloc(req.private_data_len, GFP_ATOMIC); 2478 if (!private_data) 2479 return -ENOMEM; 2480 2481 if (conn_param->private_data && conn_param->private_data_len) 2482 memcpy(private_data + offset, conn_param->private_data, 2483 conn_param->private_data_len); 2484 2485 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_ib_handler, 2486 id_priv); 2487 if (IS_ERR(id_priv->cm_id.ib)) { 2488 ret = PTR_ERR(id_priv->cm_id.ib); 2489 goto out; 2490 } 2491 2492 route = &id_priv->id.route; 2493 ret = cma_format_hdr(private_data, id_priv->id.ps, route); 2494 if (ret) 2495 goto out; 2496 req.private_data = private_data; 2497 2498 req.primary_path = &route->path_rec[0]; 2499 if (route->num_paths == 2) 2500 req.alternate_path = &route->path_rec[1]; 2501 2502 req.service_id = cma_get_service_id(id_priv->id.ps, 2503 (struct sockaddr *) &route->addr.dst_addr); 2504 req.qp_num = id_priv->qp_num; 2505 req.qp_type = IB_QPT_RC; 2506 req.starting_psn = id_priv->seq_num; 2507 req.responder_resources = conn_param->responder_resources; 2508 req.initiator_depth = conn_param->initiator_depth; 2509 req.flow_control = conn_param->flow_control; 2510 req.retry_count = conn_param->retry_count; 2511 req.rnr_retry_count = conn_param->rnr_retry_count; 2512 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; 2513 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; 2514 req.max_cm_retries = CMA_MAX_CM_RETRIES; 2515 req.srq = id_priv->srq ? 1 : 0; 2516 2517 ret = ib_send_cm_req(id_priv->cm_id.ib, &req); 2518 out: 2519 if (ret && !IS_ERR(id_priv->cm_id.ib)) { 2520 ib_destroy_cm_id(id_priv->cm_id.ib); 2521 id_priv->cm_id.ib = NULL; 2522 } 2523 2524 kfree(private_data); 2525 return ret; 2526 } 2527 2528 static int cma_connect_iw(struct rdma_id_private *id_priv, 2529 struct rdma_conn_param *conn_param) 2530 { 2531 struct iw_cm_id *cm_id; 2532 struct sockaddr_in* sin; 2533 int ret; 2534 struct iw_cm_conn_param iw_param; 2535 2536 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv); 2537 if (IS_ERR(cm_id)) { 2538 ret = PTR_ERR(cm_id); 2539 goto out; 2540 } 2541 2542 id_priv->cm_id.iw = cm_id; 2543 2544 sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr; 2545 cm_id->local_addr = *sin; 2546 2547 sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr; 2548 cm_id->remote_addr = *sin; 2549 2550 ret = cma_modify_qp_rtr(id_priv, conn_param); 2551 if (ret) 2552 goto out; 2553 2554 iw_param.ord = conn_param->initiator_depth; 2555 iw_param.ird = conn_param->responder_resources; 2556 iw_param.private_data = conn_param->private_data; 2557 iw_param.private_data_len = conn_param->private_data_len; 2558 if (id_priv->id.qp) 2559 iw_param.qpn = id_priv->qp_num; 2560 else 2561 iw_param.qpn = conn_param->qp_num; 2562 ret = iw_cm_connect(cm_id, &iw_param); 2563 out: 2564 if (ret && !IS_ERR(cm_id)) { 2565 iw_destroy_cm_id(cm_id); 2566 id_priv->cm_id.iw = NULL; 2567 } 2568 return ret; 2569 } 2570 2571 int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) 2572 { 2573 struct rdma_id_private *id_priv; 2574 int ret; 2575 2576 id_priv = container_of(id, struct rdma_id_private, id); 2577 if (!cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_CONNECT)) 2578 return -EINVAL; 2579 2580 if (!id->qp) { 2581 id_priv->qp_num = conn_param->qp_num; 2582 id_priv->srq = conn_param->srq; 2583 } 2584 2585 switch (rdma_node_get_transport(id->device->node_type)) { 2586 case RDMA_TRANSPORT_IB: 2587 if (cma_is_ud_ps(id->ps)) 2588 ret = cma_resolve_ib_udp(id_priv, conn_param); 2589 else 2590 ret = cma_connect_ib(id_priv, conn_param); 2591 break; 2592 case RDMA_TRANSPORT_IWARP: 2593 ret = cma_connect_iw(id_priv, conn_param); 2594 break; 2595 default: 2596 ret = -ENOSYS; 2597 break; 2598 } 2599 if (ret) 2600 goto err; 2601 2602 return 0; 2603 err: 2604 cma_comp_exch(id_priv, CMA_CONNECT, CMA_ROUTE_RESOLVED); 2605 return ret; 2606 } 2607 EXPORT_SYMBOL(rdma_connect); 2608 2609 static int cma_accept_ib(struct rdma_id_private *id_priv, 2610 struct rdma_conn_param *conn_param) 2611 { 2612 struct ib_cm_rep_param rep; 2613 int ret; 2614 2615 ret = cma_modify_qp_rtr(id_priv, conn_param); 2616 if (ret) 2617 goto out; 2618 2619 ret = cma_modify_qp_rts(id_priv, conn_param); 2620 if (ret) 2621 goto out; 2622 2623 memset(&rep, 0, sizeof rep); 2624 rep.qp_num = id_priv->qp_num; 2625 rep.starting_psn = id_priv->seq_num; 2626 rep.private_data = conn_param->private_data; 2627 rep.private_data_len = conn_param->private_data_len; 2628 rep.responder_resources = conn_param->responder_resources; 2629 rep.initiator_depth = conn_param->initiator_depth; 2630 rep.failover_accepted = 0; 2631 rep.flow_control = conn_param->flow_control; 2632 rep.rnr_retry_count = conn_param->rnr_retry_count; 2633 rep.srq = id_priv->srq ? 1 : 0; 2634 2635 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep); 2636 out: 2637 return ret; 2638 } 2639 2640 static int cma_accept_iw(struct rdma_id_private *id_priv, 2641 struct rdma_conn_param *conn_param) 2642 { 2643 struct iw_cm_conn_param iw_param; 2644 int ret; 2645 2646 ret = cma_modify_qp_rtr(id_priv, conn_param); 2647 if (ret) 2648 return ret; 2649 2650 iw_param.ord = conn_param->initiator_depth; 2651 iw_param.ird = conn_param->responder_resources; 2652 iw_param.private_data = conn_param->private_data; 2653 iw_param.private_data_len = conn_param->private_data_len; 2654 if (id_priv->id.qp) { 2655 iw_param.qpn = id_priv->qp_num; 2656 } else 2657 iw_param.qpn = conn_param->qp_num; 2658 2659 return iw_cm_accept(id_priv->cm_id.iw, &iw_param); 2660 } 2661 2662 static int cma_send_sidr_rep(struct rdma_id_private *id_priv, 2663 enum ib_cm_sidr_status status, 2664 const void *private_data, int private_data_len) 2665 { 2666 struct ib_cm_sidr_rep_param rep; 2667 int ret; 2668 2669 memset(&rep, 0, sizeof rep); 2670 rep.status = status; 2671 if (status == IB_SIDR_SUCCESS) { 2672 ret = cma_set_qkey(id_priv); 2673 if (ret) 2674 return ret; 2675 rep.qp_num = id_priv->qp_num; 2676 rep.qkey = id_priv->qkey; 2677 } 2678 rep.private_data = private_data; 2679 rep.private_data_len = private_data_len; 2680 2681 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep); 2682 } 2683 2684 int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) 2685 { 2686 struct rdma_id_private *id_priv; 2687 int ret; 2688 2689 id_priv = container_of(id, struct rdma_id_private, id); 2690 if (!cma_comp(id_priv, CMA_CONNECT)) 2691 return -EINVAL; 2692 2693 if (!id->qp && conn_param) { 2694 id_priv->qp_num = conn_param->qp_num; 2695 id_priv->srq = conn_param->srq; 2696 } 2697 2698 switch (rdma_node_get_transport(id->device->node_type)) { 2699 case RDMA_TRANSPORT_IB: 2700 if (cma_is_ud_ps(id->ps)) 2701 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS, 2702 conn_param->private_data, 2703 conn_param->private_data_len); 2704 else if (conn_param) 2705 ret = cma_accept_ib(id_priv, conn_param); 2706 else 2707 ret = cma_rep_recv(id_priv); 2708 break; 2709 case RDMA_TRANSPORT_IWARP: 2710 ret = cma_accept_iw(id_priv, conn_param); 2711 break; 2712 default: 2713 ret = -ENOSYS; 2714 break; 2715 } 2716 2717 if (ret) 2718 goto reject; 2719 2720 return 0; 2721 reject: 2722 cma_modify_qp_err(id_priv); 2723 rdma_reject(id, NULL, 0); 2724 return ret; 2725 } 2726 EXPORT_SYMBOL(rdma_accept); 2727 2728 int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event) 2729 { 2730 struct rdma_id_private *id_priv; 2731 int ret; 2732 2733 id_priv = container_of(id, struct rdma_id_private, id); 2734 if (!cma_has_cm_dev(id_priv)) 2735 return -EINVAL; 2736 2737 switch (id->device->node_type) { 2738 case RDMA_NODE_IB_CA: 2739 ret = ib_cm_notify(id_priv->cm_id.ib, event); 2740 break; 2741 default: 2742 ret = 0; 2743 break; 2744 } 2745 return ret; 2746 } 2747 EXPORT_SYMBOL(rdma_notify); 2748 2749 int rdma_reject(struct rdma_cm_id *id, const void *private_data, 2750 u8 private_data_len) 2751 { 2752 struct rdma_id_private *id_priv; 2753 int ret; 2754 2755 id_priv = container_of(id, struct rdma_id_private, id); 2756 if (!cma_has_cm_dev(id_priv)) 2757 return -EINVAL; 2758 2759 switch (rdma_node_get_transport(id->device->node_type)) { 2760 case RDMA_TRANSPORT_IB: 2761 if (cma_is_ud_ps(id->ps)) 2762 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 2763 private_data, private_data_len); 2764 else 2765 ret = ib_send_cm_rej(id_priv->cm_id.ib, 2766 IB_CM_REJ_CONSUMER_DEFINED, NULL, 2767 0, private_data, private_data_len); 2768 break; 2769 case RDMA_TRANSPORT_IWARP: 2770 ret = iw_cm_reject(id_priv->cm_id.iw, 2771 private_data, private_data_len); 2772 break; 2773 default: 2774 ret = -ENOSYS; 2775 break; 2776 } 2777 return ret; 2778 } 2779 EXPORT_SYMBOL(rdma_reject); 2780 2781 int rdma_disconnect(struct rdma_cm_id *id) 2782 { 2783 struct rdma_id_private *id_priv; 2784 int ret; 2785 2786 id_priv = container_of(id, struct rdma_id_private, id); 2787 if (!cma_has_cm_dev(id_priv)) 2788 return -EINVAL; 2789 2790 switch (rdma_node_get_transport(id->device->node_type)) { 2791 case RDMA_TRANSPORT_IB: 2792 ret = cma_modify_qp_err(id_priv); 2793 if (ret) 2794 goto out; 2795 /* Initiate or respond to a disconnect. */ 2796 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0)) 2797 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0); 2798 break; 2799 case RDMA_TRANSPORT_IWARP: 2800 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0); 2801 break; 2802 default: 2803 ret = -EINVAL; 2804 break; 2805 } 2806 out: 2807 return ret; 2808 } 2809 EXPORT_SYMBOL(rdma_disconnect); 2810 2811 static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast) 2812 { 2813 struct rdma_id_private *id_priv; 2814 struct cma_multicast *mc = multicast->context; 2815 struct rdma_cm_event event; 2816 int ret; 2817 2818 id_priv = mc->id_priv; 2819 if (cma_disable_callback(id_priv, CMA_ADDR_BOUND) && 2820 cma_disable_callback(id_priv, CMA_ADDR_RESOLVED)) 2821 return 0; 2822 2823 mutex_lock(&id_priv->qp_mutex); 2824 if (!status && id_priv->id.qp) 2825 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid, 2826 multicast->rec.mlid); 2827 mutex_unlock(&id_priv->qp_mutex); 2828 2829 memset(&event, 0, sizeof event); 2830 event.status = status; 2831 event.param.ud.private_data = mc->context; 2832 if (!status) { 2833 event.event = RDMA_CM_EVENT_MULTICAST_JOIN; 2834 ib_init_ah_from_mcmember(id_priv->id.device, 2835 id_priv->id.port_num, &multicast->rec, 2836 &event.param.ud.ah_attr); 2837 event.param.ud.qp_num = 0xFFFFFF; 2838 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey); 2839 } else 2840 event.event = RDMA_CM_EVENT_MULTICAST_ERROR; 2841 2842 ret = id_priv->id.event_handler(&id_priv->id, &event); 2843 if (ret) { 2844 cma_exch(id_priv, CMA_DESTROYING); 2845 mutex_unlock(&id_priv->handler_mutex); 2846 rdma_destroy_id(&id_priv->id); 2847 return 0; 2848 } 2849 2850 mutex_unlock(&id_priv->handler_mutex); 2851 return 0; 2852 } 2853 2854 static void cma_set_mgid(struct rdma_id_private *id_priv, 2855 struct sockaddr *addr, union ib_gid *mgid) 2856 { 2857 unsigned char mc_map[MAX_ADDR_LEN]; 2858 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 2859 struct sockaddr_in *sin = (struct sockaddr_in *) addr; 2860 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr; 2861 2862 if (cma_any_addr(addr)) { 2863 memset(mgid, 0, sizeof *mgid); 2864 } else if ((addr->sa_family == AF_INET6) && 2865 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) == 2866 0xFF10A01B)) { 2867 /* IPv6 address is an SA assigned MGID. */ 2868 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid); 2869 } else if ((addr->sa_family == AF_INET6)) { 2870 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map); 2871 if (id_priv->id.ps == RDMA_PS_UDP) 2872 mc_map[7] = 0x01; /* Use RDMA CM signature */ 2873 *mgid = *(union ib_gid *) (mc_map + 4); 2874 } else { 2875 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map); 2876 if (id_priv->id.ps == RDMA_PS_UDP) 2877 mc_map[7] = 0x01; /* Use RDMA CM signature */ 2878 *mgid = *(union ib_gid *) (mc_map + 4); 2879 } 2880 } 2881 2882 static int cma_join_ib_multicast(struct rdma_id_private *id_priv, 2883 struct cma_multicast *mc) 2884 { 2885 struct ib_sa_mcmember_rec rec; 2886 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 2887 ib_sa_comp_mask comp_mask; 2888 int ret; 2889 2890 ib_addr_get_mgid(dev_addr, &rec.mgid); 2891 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num, 2892 &rec.mgid, &rec); 2893 if (ret) 2894 return ret; 2895 2896 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid); 2897 if (id_priv->id.ps == RDMA_PS_UDP) 2898 rec.qkey = cpu_to_be32(RDMA_UDP_QKEY); 2899 rdma_addr_get_sgid(dev_addr, &rec.port_gid); 2900 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); 2901 rec.join_state = 1; 2902 2903 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID | 2904 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE | 2905 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL | 2906 IB_SA_MCMEMBER_REC_FLOW_LABEL | 2907 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS; 2908 2909 if (id_priv->id.ps == RDMA_PS_IPOIB) 2910 comp_mask |= IB_SA_MCMEMBER_REC_RATE | 2911 IB_SA_MCMEMBER_REC_RATE_SELECTOR; 2912 2913 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device, 2914 id_priv->id.port_num, &rec, 2915 comp_mask, GFP_KERNEL, 2916 cma_ib_mc_handler, mc); 2917 if (IS_ERR(mc->multicast.ib)) 2918 return PTR_ERR(mc->multicast.ib); 2919 2920 return 0; 2921 } 2922 2923 static void iboe_mcast_work_handler(struct work_struct *work) 2924 { 2925 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work); 2926 struct cma_multicast *mc = mw->mc; 2927 struct ib_sa_multicast *m = mc->multicast.ib; 2928 2929 mc->multicast.ib->context = mc; 2930 cma_ib_mc_handler(0, m); 2931 kref_put(&mc->mcref, release_mc); 2932 kfree(mw); 2933 } 2934 2935 static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid) 2936 { 2937 struct sockaddr_in *sin = (struct sockaddr_in *)addr; 2938 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr; 2939 2940 if (cma_any_addr(addr)) { 2941 memset(mgid, 0, sizeof *mgid); 2942 } else if (addr->sa_family == AF_INET6) { 2943 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid); 2944 } else { 2945 mgid->raw[0] = 0xff; 2946 mgid->raw[1] = 0x0e; 2947 mgid->raw[2] = 0; 2948 mgid->raw[3] = 0; 2949 mgid->raw[4] = 0; 2950 mgid->raw[5] = 0; 2951 mgid->raw[6] = 0; 2952 mgid->raw[7] = 0; 2953 mgid->raw[8] = 0; 2954 mgid->raw[9] = 0; 2955 mgid->raw[10] = 0xff; 2956 mgid->raw[11] = 0xff; 2957 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr; 2958 } 2959 } 2960 2961 static int cma_iboe_join_multicast(struct rdma_id_private *id_priv, 2962 struct cma_multicast *mc) 2963 { 2964 struct iboe_mcast_work *work; 2965 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 2966 int err; 2967 struct sockaddr *addr = (struct sockaddr *)&mc->addr; 2968 struct net_device *ndev = NULL; 2969 2970 if (cma_zero_addr((struct sockaddr *)&mc->addr)) 2971 return -EINVAL; 2972 2973 work = kzalloc(sizeof *work, GFP_KERNEL); 2974 if (!work) 2975 return -ENOMEM; 2976 2977 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL); 2978 if (!mc->multicast.ib) { 2979 err = -ENOMEM; 2980 goto out1; 2981 } 2982 2983 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid); 2984 2985 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff); 2986 if (id_priv->id.ps == RDMA_PS_UDP) 2987 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY); 2988 2989 if (dev_addr->bound_dev_if) 2990 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if); 2991 if (!ndev) { 2992 err = -ENODEV; 2993 goto out2; 2994 } 2995 mc->multicast.ib->rec.rate = iboe_get_rate(ndev); 2996 mc->multicast.ib->rec.hop_limit = 1; 2997 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu); 2998 dev_put(ndev); 2999 if (!mc->multicast.ib->rec.mtu) { 3000 err = -EINVAL; 3001 goto out2; 3002 } 3003 iboe_addr_get_sgid(dev_addr, &mc->multicast.ib->rec.port_gid); 3004 work->id = id_priv; 3005 work->mc = mc; 3006 INIT_WORK(&work->work, iboe_mcast_work_handler); 3007 kref_get(&mc->mcref); 3008 queue_work(cma_wq, &work->work); 3009 3010 return 0; 3011 3012 out2: 3013 kfree(mc->multicast.ib); 3014 out1: 3015 kfree(work); 3016 return err; 3017 } 3018 3019 int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr, 3020 void *context) 3021 { 3022 struct rdma_id_private *id_priv; 3023 struct cma_multicast *mc; 3024 int ret; 3025 3026 id_priv = container_of(id, struct rdma_id_private, id); 3027 if (!cma_comp(id_priv, CMA_ADDR_BOUND) && 3028 !cma_comp(id_priv, CMA_ADDR_RESOLVED)) 3029 return -EINVAL; 3030 3031 mc = kmalloc(sizeof *mc, GFP_KERNEL); 3032 if (!mc) 3033 return -ENOMEM; 3034 3035 memcpy(&mc->addr, addr, ip_addr_size(addr)); 3036 mc->context = context; 3037 mc->id_priv = id_priv; 3038 3039 spin_lock(&id_priv->lock); 3040 list_add(&mc->list, &id_priv->mc_list); 3041 spin_unlock(&id_priv->lock); 3042 3043 switch (rdma_node_get_transport(id->device->node_type)) { 3044 case RDMA_TRANSPORT_IB: 3045 switch (rdma_port_get_link_layer(id->device, id->port_num)) { 3046 case IB_LINK_LAYER_INFINIBAND: 3047 ret = cma_join_ib_multicast(id_priv, mc); 3048 break; 3049 case IB_LINK_LAYER_ETHERNET: 3050 kref_init(&mc->mcref); 3051 ret = cma_iboe_join_multicast(id_priv, mc); 3052 break; 3053 default: 3054 ret = -EINVAL; 3055 } 3056 break; 3057 default: 3058 ret = -ENOSYS; 3059 break; 3060 } 3061 3062 if (ret) { 3063 spin_lock_irq(&id_priv->lock); 3064 list_del(&mc->list); 3065 spin_unlock_irq(&id_priv->lock); 3066 kfree(mc); 3067 } 3068 return ret; 3069 } 3070 EXPORT_SYMBOL(rdma_join_multicast); 3071 3072 void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr) 3073 { 3074 struct rdma_id_private *id_priv; 3075 struct cma_multicast *mc; 3076 3077 id_priv = container_of(id, struct rdma_id_private, id); 3078 spin_lock_irq(&id_priv->lock); 3079 list_for_each_entry(mc, &id_priv->mc_list, list) { 3080 if (!memcmp(&mc->addr, addr, ip_addr_size(addr))) { 3081 list_del(&mc->list); 3082 spin_unlock_irq(&id_priv->lock); 3083 3084 if (id->qp) 3085 ib_detach_mcast(id->qp, 3086 &mc->multicast.ib->rec.mgid, 3087 mc->multicast.ib->rec.mlid); 3088 if (rdma_node_get_transport(id_priv->cma_dev->device->node_type) == RDMA_TRANSPORT_IB) { 3089 switch (rdma_port_get_link_layer(id->device, id->port_num)) { 3090 case IB_LINK_LAYER_INFINIBAND: 3091 ib_sa_free_multicast(mc->multicast.ib); 3092 kfree(mc); 3093 break; 3094 case IB_LINK_LAYER_ETHERNET: 3095 kref_put(&mc->mcref, release_mc); 3096 break; 3097 default: 3098 break; 3099 } 3100 } 3101 return; 3102 } 3103 } 3104 spin_unlock_irq(&id_priv->lock); 3105 } 3106 EXPORT_SYMBOL(rdma_leave_multicast); 3107 3108 static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv) 3109 { 3110 struct rdma_dev_addr *dev_addr; 3111 struct cma_ndev_work *work; 3112 3113 dev_addr = &id_priv->id.route.addr.dev_addr; 3114 3115 if ((dev_addr->bound_dev_if == ndev->ifindex) && 3116 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) { 3117 printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n", 3118 ndev->name, &id_priv->id); 3119 work = kzalloc(sizeof *work, GFP_KERNEL); 3120 if (!work) 3121 return -ENOMEM; 3122 3123 INIT_WORK(&work->work, cma_ndev_work_handler); 3124 work->id = id_priv; 3125 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE; 3126 atomic_inc(&id_priv->refcount); 3127 queue_work(cma_wq, &work->work); 3128 } 3129 3130 return 0; 3131 } 3132 3133 static int cma_netdev_callback(struct notifier_block *self, unsigned long event, 3134 void *ctx) 3135 { 3136 struct net_device *ndev = (struct net_device *)ctx; 3137 struct cma_device *cma_dev; 3138 struct rdma_id_private *id_priv; 3139 int ret = NOTIFY_DONE; 3140 3141 if (dev_net(ndev) != &init_net) 3142 return NOTIFY_DONE; 3143 3144 if (event != NETDEV_BONDING_FAILOVER) 3145 return NOTIFY_DONE; 3146 3147 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING)) 3148 return NOTIFY_DONE; 3149 3150 mutex_lock(&lock); 3151 list_for_each_entry(cma_dev, &dev_list, list) 3152 list_for_each_entry(id_priv, &cma_dev->id_list, list) { 3153 ret = cma_netdev_change(ndev, id_priv); 3154 if (ret) 3155 goto out; 3156 } 3157 3158 out: 3159 mutex_unlock(&lock); 3160 return ret; 3161 } 3162 3163 static struct notifier_block cma_nb = { 3164 .notifier_call = cma_netdev_callback 3165 }; 3166 3167 static void cma_add_one(struct ib_device *device) 3168 { 3169 struct cma_device *cma_dev; 3170 struct rdma_id_private *id_priv; 3171 3172 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL); 3173 if (!cma_dev) 3174 return; 3175 3176 cma_dev->device = device; 3177 3178 init_completion(&cma_dev->comp); 3179 atomic_set(&cma_dev->refcount, 1); 3180 INIT_LIST_HEAD(&cma_dev->id_list); 3181 ib_set_client_data(device, &cma_client, cma_dev); 3182 3183 mutex_lock(&lock); 3184 list_add_tail(&cma_dev->list, &dev_list); 3185 list_for_each_entry(id_priv, &listen_any_list, list) 3186 cma_listen_on_dev(id_priv, cma_dev); 3187 mutex_unlock(&lock); 3188 } 3189 3190 static int cma_remove_id_dev(struct rdma_id_private *id_priv) 3191 { 3192 struct rdma_cm_event event; 3193 enum cma_state state; 3194 int ret = 0; 3195 3196 /* Record that we want to remove the device */ 3197 state = cma_exch(id_priv, CMA_DEVICE_REMOVAL); 3198 if (state == CMA_DESTROYING) 3199 return 0; 3200 3201 cma_cancel_operation(id_priv, state); 3202 mutex_lock(&id_priv->handler_mutex); 3203 3204 /* Check for destruction from another callback. */ 3205 if (!cma_comp(id_priv, CMA_DEVICE_REMOVAL)) 3206 goto out; 3207 3208 memset(&event, 0, sizeof event); 3209 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL; 3210 ret = id_priv->id.event_handler(&id_priv->id, &event); 3211 out: 3212 mutex_unlock(&id_priv->handler_mutex); 3213 return ret; 3214 } 3215 3216 static void cma_process_remove(struct cma_device *cma_dev) 3217 { 3218 struct rdma_id_private *id_priv; 3219 int ret; 3220 3221 mutex_lock(&lock); 3222 while (!list_empty(&cma_dev->id_list)) { 3223 id_priv = list_entry(cma_dev->id_list.next, 3224 struct rdma_id_private, list); 3225 3226 list_del(&id_priv->listen_list); 3227 list_del_init(&id_priv->list); 3228 atomic_inc(&id_priv->refcount); 3229 mutex_unlock(&lock); 3230 3231 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv); 3232 cma_deref_id(id_priv); 3233 if (ret) 3234 rdma_destroy_id(&id_priv->id); 3235 3236 mutex_lock(&lock); 3237 } 3238 mutex_unlock(&lock); 3239 3240 cma_deref_dev(cma_dev); 3241 wait_for_completion(&cma_dev->comp); 3242 } 3243 3244 static void cma_remove_one(struct ib_device *device) 3245 { 3246 struct cma_device *cma_dev; 3247 3248 cma_dev = ib_get_client_data(device, &cma_client); 3249 if (!cma_dev) 3250 return; 3251 3252 mutex_lock(&lock); 3253 list_del(&cma_dev->list); 3254 mutex_unlock(&lock); 3255 3256 cma_process_remove(cma_dev); 3257 kfree(cma_dev); 3258 } 3259 3260 static int __init cma_init(void) 3261 { 3262 int ret; 3263 3264 cma_wq = create_singlethread_workqueue("rdma_cm"); 3265 if (!cma_wq) 3266 return -ENOMEM; 3267 3268 ib_sa_register_client(&sa_client); 3269 rdma_addr_register_client(&addr_client); 3270 register_netdevice_notifier(&cma_nb); 3271 3272 ret = ib_register_client(&cma_client); 3273 if (ret) 3274 goto err; 3275 return 0; 3276 3277 err: 3278 unregister_netdevice_notifier(&cma_nb); 3279 rdma_addr_unregister_client(&addr_client); 3280 ib_sa_unregister_client(&sa_client); 3281 destroy_workqueue(cma_wq); 3282 return ret; 3283 } 3284 3285 static void __exit cma_cleanup(void) 3286 { 3287 ib_unregister_client(&cma_client); 3288 unregister_netdevice_notifier(&cma_nb); 3289 rdma_addr_unregister_client(&addr_client); 3290 ib_sa_unregister_client(&sa_client); 3291 destroy_workqueue(cma_wq); 3292 idr_destroy(&sdp_ps); 3293 idr_destroy(&tcp_ps); 3294 idr_destroy(&udp_ps); 3295 idr_destroy(&ipoib_ps); 3296 } 3297 3298 module_init(cma_init); 3299 module_exit(cma_cleanup); 3300