cma.c revision a9bb79128aa659f97b774b97c9bb1bdc74444595
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 55MODULE_AUTHOR("Sean Hefty"); 56MODULE_DESCRIPTION("Generic RDMA CM Agent"); 57MODULE_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 64static void cma_add_one(struct ib_device *device); 65static void cma_remove_one(struct ib_device *device); 66 67static struct ib_client cma_client = { 68 .name = "cma", 69 .add = cma_add_one, 70 .remove = cma_remove_one 71}; 72 73static struct ib_sa_client sa_client; 74static struct rdma_addr_client addr_client; 75static LIST_HEAD(dev_list); 76static LIST_HEAD(listen_any_list); 77static DEFINE_MUTEX(lock); 78static struct workqueue_struct *cma_wq; 79static DEFINE_IDR(sdp_ps); 80static DEFINE_IDR(tcp_ps); 81static DEFINE_IDR(udp_ps); 82static DEFINE_IDR(ipoib_ps); 83 84struct 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 92enum 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 106struct 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 */ 118struct 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 u8 reuseaddr; 152}; 153 154struct cma_multicast { 155 struct rdma_id_private *id_priv; 156 union { 157 struct ib_sa_multicast *ib; 158 } multicast; 159 struct list_head list; 160 void *context; 161 struct sockaddr_storage addr; 162 struct kref mcref; 163}; 164 165struct cma_work { 166 struct work_struct work; 167 struct rdma_id_private *id; 168 enum cma_state old_state; 169 enum cma_state new_state; 170 struct rdma_cm_event event; 171}; 172 173struct cma_ndev_work { 174 struct work_struct work; 175 struct rdma_id_private *id; 176 struct rdma_cm_event event; 177}; 178 179struct iboe_mcast_work { 180 struct work_struct work; 181 struct rdma_id_private *id; 182 struct cma_multicast *mc; 183}; 184 185union cma_ip_addr { 186 struct in6_addr ip6; 187 struct { 188 __be32 pad[3]; 189 __be32 addr; 190 } ip4; 191}; 192 193struct cma_hdr { 194 u8 cma_version; 195 u8 ip_version; /* IP version: 7:4 */ 196 __be16 port; 197 union cma_ip_addr src_addr; 198 union cma_ip_addr dst_addr; 199}; 200 201struct sdp_hh { 202 u8 bsdh[16]; 203 u8 sdp_version; /* Major version: 7:4 */ 204 u8 ip_version; /* IP version: 7:4 */ 205 u8 sdp_specific1[10]; 206 __be16 port; 207 __be16 sdp_specific2; 208 union cma_ip_addr src_addr; 209 union cma_ip_addr dst_addr; 210}; 211 212struct sdp_hah { 213 u8 bsdh[16]; 214 u8 sdp_version; 215}; 216 217#define CMA_VERSION 0x00 218#define SDP_MAJ_VERSION 0x2 219 220static int cma_comp(struct rdma_id_private *id_priv, enum cma_state comp) 221{ 222 unsigned long flags; 223 int ret; 224 225 spin_lock_irqsave(&id_priv->lock, flags); 226 ret = (id_priv->state == comp); 227 spin_unlock_irqrestore(&id_priv->lock, flags); 228 return ret; 229} 230 231static int cma_comp_exch(struct rdma_id_private *id_priv, 232 enum cma_state comp, enum cma_state exch) 233{ 234 unsigned long flags; 235 int ret; 236 237 spin_lock_irqsave(&id_priv->lock, flags); 238 if ((ret = (id_priv->state == comp))) 239 id_priv->state = exch; 240 spin_unlock_irqrestore(&id_priv->lock, flags); 241 return ret; 242} 243 244static enum cma_state cma_exch(struct rdma_id_private *id_priv, 245 enum cma_state exch) 246{ 247 unsigned long flags; 248 enum cma_state old; 249 250 spin_lock_irqsave(&id_priv->lock, flags); 251 old = id_priv->state; 252 id_priv->state = exch; 253 spin_unlock_irqrestore(&id_priv->lock, flags); 254 return old; 255} 256 257static inline u8 cma_get_ip_ver(struct cma_hdr *hdr) 258{ 259 return hdr->ip_version >> 4; 260} 261 262static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver) 263{ 264 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF); 265} 266 267static inline u8 sdp_get_majv(u8 sdp_version) 268{ 269 return sdp_version >> 4; 270} 271 272static inline u8 sdp_get_ip_ver(struct sdp_hh *hh) 273{ 274 return hh->ip_version >> 4; 275} 276 277static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver) 278{ 279 hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF); 280} 281 282static inline int cma_is_ud_ps(enum rdma_port_space ps) 283{ 284 return (ps == RDMA_PS_UDP || ps == RDMA_PS_IPOIB); 285} 286 287static void cma_attach_to_dev(struct rdma_id_private *id_priv, 288 struct cma_device *cma_dev) 289{ 290 atomic_inc(&cma_dev->refcount); 291 id_priv->cma_dev = cma_dev; 292 id_priv->id.device = cma_dev->device; 293 id_priv->id.route.addr.dev_addr.transport = 294 rdma_node_get_transport(cma_dev->device->node_type); 295 list_add_tail(&id_priv->list, &cma_dev->id_list); 296} 297 298static inline void cma_deref_dev(struct cma_device *cma_dev) 299{ 300 if (atomic_dec_and_test(&cma_dev->refcount)) 301 complete(&cma_dev->comp); 302} 303 304static inline void release_mc(struct kref *kref) 305{ 306 struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref); 307 308 kfree(mc->multicast.ib); 309 kfree(mc); 310} 311 312static void cma_release_dev(struct rdma_id_private *id_priv) 313{ 314 mutex_lock(&lock); 315 list_del(&id_priv->list); 316 cma_deref_dev(id_priv->cma_dev); 317 id_priv->cma_dev = NULL; 318 mutex_unlock(&lock); 319} 320 321static int cma_set_qkey(struct rdma_id_private *id_priv) 322{ 323 struct ib_sa_mcmember_rec rec; 324 int ret = 0; 325 326 if (id_priv->qkey) 327 return 0; 328 329 switch (id_priv->id.ps) { 330 case RDMA_PS_UDP: 331 id_priv->qkey = RDMA_UDP_QKEY; 332 break; 333 case RDMA_PS_IPOIB: 334 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid); 335 ret = ib_sa_get_mcmember_rec(id_priv->id.device, 336 id_priv->id.port_num, &rec.mgid, 337 &rec); 338 if (!ret) 339 id_priv->qkey = be32_to_cpu(rec.qkey); 340 break; 341 default: 342 break; 343 } 344 return ret; 345} 346 347static int find_gid_port(struct ib_device *device, union ib_gid *gid, u8 port_num) 348{ 349 int i; 350 int err; 351 struct ib_port_attr props; 352 union ib_gid tmp; 353 354 err = ib_query_port(device, port_num, &props); 355 if (err) 356 return 1; 357 358 for (i = 0; i < props.gid_tbl_len; ++i) { 359 err = ib_query_gid(device, port_num, i, &tmp); 360 if (err) 361 return 1; 362 if (!memcmp(&tmp, gid, sizeof tmp)) 363 return 0; 364 } 365 366 return -EAGAIN; 367} 368 369static int cma_acquire_dev(struct rdma_id_private *id_priv) 370{ 371 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 372 struct cma_device *cma_dev; 373 union ib_gid gid, iboe_gid; 374 int ret = -ENODEV; 375 u8 port; 376 enum rdma_link_layer dev_ll = dev_addr->dev_type == ARPHRD_INFINIBAND ? 377 IB_LINK_LAYER_INFINIBAND : IB_LINK_LAYER_ETHERNET; 378 379 mutex_lock(&lock); 380 iboe_addr_get_sgid(dev_addr, &iboe_gid); 381 memcpy(&gid, dev_addr->src_dev_addr + 382 rdma_addr_gid_offset(dev_addr), sizeof gid); 383 list_for_each_entry(cma_dev, &dev_list, list) { 384 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) { 385 if (rdma_port_get_link_layer(cma_dev->device, port) == dev_ll) { 386 if (rdma_node_get_transport(cma_dev->device->node_type) == RDMA_TRANSPORT_IB && 387 rdma_port_get_link_layer(cma_dev->device, port) == IB_LINK_LAYER_ETHERNET) 388 ret = find_gid_port(cma_dev->device, &iboe_gid, port); 389 else 390 ret = find_gid_port(cma_dev->device, &gid, port); 391 392 if (!ret) { 393 id_priv->id.port_num = port; 394 goto out; 395 } else if (ret == 1) 396 break; 397 } 398 } 399 } 400 401out: 402 if (!ret) 403 cma_attach_to_dev(id_priv, cma_dev); 404 405 mutex_unlock(&lock); 406 return ret; 407} 408 409static void cma_deref_id(struct rdma_id_private *id_priv) 410{ 411 if (atomic_dec_and_test(&id_priv->refcount)) 412 complete(&id_priv->comp); 413} 414 415static int cma_disable_callback(struct rdma_id_private *id_priv, 416 enum cma_state state) 417{ 418 mutex_lock(&id_priv->handler_mutex); 419 if (id_priv->state != state) { 420 mutex_unlock(&id_priv->handler_mutex); 421 return -EINVAL; 422 } 423 return 0; 424} 425 426static int cma_has_cm_dev(struct rdma_id_private *id_priv) 427{ 428 return (id_priv->id.device && id_priv->cm_id.ib); 429} 430 431struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler, 432 void *context, enum rdma_port_space ps) 433{ 434 struct rdma_id_private *id_priv; 435 436 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL); 437 if (!id_priv) 438 return ERR_PTR(-ENOMEM); 439 440 id_priv->state = CMA_IDLE; 441 id_priv->id.context = context; 442 id_priv->id.event_handler = event_handler; 443 id_priv->id.ps = ps; 444 spin_lock_init(&id_priv->lock); 445 mutex_init(&id_priv->qp_mutex); 446 init_completion(&id_priv->comp); 447 atomic_set(&id_priv->refcount, 1); 448 mutex_init(&id_priv->handler_mutex); 449 INIT_LIST_HEAD(&id_priv->listen_list); 450 INIT_LIST_HEAD(&id_priv->mc_list); 451 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num); 452 453 return &id_priv->id; 454} 455EXPORT_SYMBOL(rdma_create_id); 456 457static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp) 458{ 459 struct ib_qp_attr qp_attr; 460 int qp_attr_mask, ret; 461 462 qp_attr.qp_state = IB_QPS_INIT; 463 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 464 if (ret) 465 return ret; 466 467 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); 468 if (ret) 469 return ret; 470 471 qp_attr.qp_state = IB_QPS_RTR; 472 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE); 473 if (ret) 474 return ret; 475 476 qp_attr.qp_state = IB_QPS_RTS; 477 qp_attr.sq_psn = 0; 478 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN); 479 480 return ret; 481} 482 483static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp) 484{ 485 struct ib_qp_attr qp_attr; 486 int qp_attr_mask, ret; 487 488 qp_attr.qp_state = IB_QPS_INIT; 489 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 490 if (ret) 491 return ret; 492 493 return ib_modify_qp(qp, &qp_attr, qp_attr_mask); 494} 495 496int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd, 497 struct ib_qp_init_attr *qp_init_attr) 498{ 499 struct rdma_id_private *id_priv; 500 struct ib_qp *qp; 501 int ret; 502 503 id_priv = container_of(id, struct rdma_id_private, id); 504 if (id->device != pd->device) 505 return -EINVAL; 506 507 qp = ib_create_qp(pd, qp_init_attr); 508 if (IS_ERR(qp)) 509 return PTR_ERR(qp); 510 511 if (cma_is_ud_ps(id_priv->id.ps)) 512 ret = cma_init_ud_qp(id_priv, qp); 513 else 514 ret = cma_init_conn_qp(id_priv, qp); 515 if (ret) 516 goto err; 517 518 id->qp = qp; 519 id_priv->qp_num = qp->qp_num; 520 id_priv->srq = (qp->srq != NULL); 521 return 0; 522err: 523 ib_destroy_qp(qp); 524 return ret; 525} 526EXPORT_SYMBOL(rdma_create_qp); 527 528void rdma_destroy_qp(struct rdma_cm_id *id) 529{ 530 struct rdma_id_private *id_priv; 531 532 id_priv = container_of(id, struct rdma_id_private, id); 533 mutex_lock(&id_priv->qp_mutex); 534 ib_destroy_qp(id_priv->id.qp); 535 id_priv->id.qp = NULL; 536 mutex_unlock(&id_priv->qp_mutex); 537} 538EXPORT_SYMBOL(rdma_destroy_qp); 539 540static int cma_modify_qp_rtr(struct rdma_id_private *id_priv, 541 struct rdma_conn_param *conn_param) 542{ 543 struct ib_qp_attr qp_attr; 544 int qp_attr_mask, ret; 545 546 mutex_lock(&id_priv->qp_mutex); 547 if (!id_priv->id.qp) { 548 ret = 0; 549 goto out; 550 } 551 552 /* Need to update QP attributes from default values. */ 553 qp_attr.qp_state = IB_QPS_INIT; 554 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 555 if (ret) 556 goto out; 557 558 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); 559 if (ret) 560 goto out; 561 562 qp_attr.qp_state = IB_QPS_RTR; 563 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 564 if (ret) 565 goto out; 566 567 if (conn_param) 568 qp_attr.max_dest_rd_atomic = conn_param->responder_resources; 569 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); 570out: 571 mutex_unlock(&id_priv->qp_mutex); 572 return ret; 573} 574 575static int cma_modify_qp_rts(struct rdma_id_private *id_priv, 576 struct rdma_conn_param *conn_param) 577{ 578 struct ib_qp_attr qp_attr; 579 int qp_attr_mask, ret; 580 581 mutex_lock(&id_priv->qp_mutex); 582 if (!id_priv->id.qp) { 583 ret = 0; 584 goto out; 585 } 586 587 qp_attr.qp_state = IB_QPS_RTS; 588 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 589 if (ret) 590 goto out; 591 592 if (conn_param) 593 qp_attr.max_rd_atomic = conn_param->initiator_depth; 594 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); 595out: 596 mutex_unlock(&id_priv->qp_mutex); 597 return ret; 598} 599 600static int cma_modify_qp_err(struct rdma_id_private *id_priv) 601{ 602 struct ib_qp_attr qp_attr; 603 int ret; 604 605 mutex_lock(&id_priv->qp_mutex); 606 if (!id_priv->id.qp) { 607 ret = 0; 608 goto out; 609 } 610 611 qp_attr.qp_state = IB_QPS_ERR; 612 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE); 613out: 614 mutex_unlock(&id_priv->qp_mutex); 615 return ret; 616} 617 618static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv, 619 struct ib_qp_attr *qp_attr, int *qp_attr_mask) 620{ 621 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 622 int ret; 623 u16 pkey; 624 625 if (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num) == 626 IB_LINK_LAYER_INFINIBAND) 627 pkey = ib_addr_get_pkey(dev_addr); 628 else 629 pkey = 0xffff; 630 631 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num, 632 pkey, &qp_attr->pkey_index); 633 if (ret) 634 return ret; 635 636 qp_attr->port_num = id_priv->id.port_num; 637 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT; 638 639 if (cma_is_ud_ps(id_priv->id.ps)) { 640 ret = cma_set_qkey(id_priv); 641 if (ret) 642 return ret; 643 644 qp_attr->qkey = id_priv->qkey; 645 *qp_attr_mask |= IB_QP_QKEY; 646 } else { 647 qp_attr->qp_access_flags = 0; 648 *qp_attr_mask |= IB_QP_ACCESS_FLAGS; 649 } 650 return 0; 651} 652 653int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr, 654 int *qp_attr_mask) 655{ 656 struct rdma_id_private *id_priv; 657 int ret = 0; 658 659 id_priv = container_of(id, struct rdma_id_private, id); 660 switch (rdma_node_get_transport(id_priv->id.device->node_type)) { 661 case RDMA_TRANSPORT_IB: 662 if (!id_priv->cm_id.ib || cma_is_ud_ps(id_priv->id.ps)) 663 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask); 664 else 665 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr, 666 qp_attr_mask); 667 if (qp_attr->qp_state == IB_QPS_RTR) 668 qp_attr->rq_psn = id_priv->seq_num; 669 break; 670 case RDMA_TRANSPORT_IWARP: 671 if (!id_priv->cm_id.iw) { 672 qp_attr->qp_access_flags = 0; 673 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS; 674 } else 675 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr, 676 qp_attr_mask); 677 break; 678 default: 679 ret = -ENOSYS; 680 break; 681 } 682 683 return ret; 684} 685EXPORT_SYMBOL(rdma_init_qp_attr); 686 687static inline int cma_zero_addr(struct sockaddr *addr) 688{ 689 struct in6_addr *ip6; 690 691 if (addr->sa_family == AF_INET) 692 return ipv4_is_zeronet( 693 ((struct sockaddr_in *)addr)->sin_addr.s_addr); 694 else { 695 ip6 = &((struct sockaddr_in6 *) addr)->sin6_addr; 696 return (ip6->s6_addr32[0] | ip6->s6_addr32[1] | 697 ip6->s6_addr32[2] | ip6->s6_addr32[3]) == 0; 698 } 699} 700 701static inline int cma_loopback_addr(struct sockaddr *addr) 702{ 703 if (addr->sa_family == AF_INET) 704 return ipv4_is_loopback( 705 ((struct sockaddr_in *) addr)->sin_addr.s_addr); 706 else 707 return ipv6_addr_loopback( 708 &((struct sockaddr_in6 *) addr)->sin6_addr); 709} 710 711static inline int cma_any_addr(struct sockaddr *addr) 712{ 713 return cma_zero_addr(addr) || cma_loopback_addr(addr); 714} 715 716static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst) 717{ 718 if (src->sa_family != dst->sa_family) 719 return -1; 720 721 switch (src->sa_family) { 722 case AF_INET: 723 return ((struct sockaddr_in *) src)->sin_addr.s_addr != 724 ((struct sockaddr_in *) dst)->sin_addr.s_addr; 725 default: 726 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr, 727 &((struct sockaddr_in6 *) dst)->sin6_addr); 728 } 729} 730 731static inline __be16 cma_port(struct sockaddr *addr) 732{ 733 if (addr->sa_family == AF_INET) 734 return ((struct sockaddr_in *) addr)->sin_port; 735 else 736 return ((struct sockaddr_in6 *) addr)->sin6_port; 737} 738 739static inline int cma_any_port(struct sockaddr *addr) 740{ 741 return !cma_port(addr); 742} 743 744static int cma_get_net_info(void *hdr, enum rdma_port_space ps, 745 u8 *ip_ver, __be16 *port, 746 union cma_ip_addr **src, union cma_ip_addr **dst) 747{ 748 switch (ps) { 749 case RDMA_PS_SDP: 750 if (sdp_get_majv(((struct sdp_hh *) hdr)->sdp_version) != 751 SDP_MAJ_VERSION) 752 return -EINVAL; 753 754 *ip_ver = sdp_get_ip_ver(hdr); 755 *port = ((struct sdp_hh *) hdr)->port; 756 *src = &((struct sdp_hh *) hdr)->src_addr; 757 *dst = &((struct sdp_hh *) hdr)->dst_addr; 758 break; 759 default: 760 if (((struct cma_hdr *) hdr)->cma_version != CMA_VERSION) 761 return -EINVAL; 762 763 *ip_ver = cma_get_ip_ver(hdr); 764 *port = ((struct cma_hdr *) hdr)->port; 765 *src = &((struct cma_hdr *) hdr)->src_addr; 766 *dst = &((struct cma_hdr *) hdr)->dst_addr; 767 break; 768 } 769 770 if (*ip_ver != 4 && *ip_ver != 6) 771 return -EINVAL; 772 return 0; 773} 774 775static void cma_save_net_info(struct rdma_addr *addr, 776 struct rdma_addr *listen_addr, 777 u8 ip_ver, __be16 port, 778 union cma_ip_addr *src, union cma_ip_addr *dst) 779{ 780 struct sockaddr_in *listen4, *ip4; 781 struct sockaddr_in6 *listen6, *ip6; 782 783 switch (ip_ver) { 784 case 4: 785 listen4 = (struct sockaddr_in *) &listen_addr->src_addr; 786 ip4 = (struct sockaddr_in *) &addr->src_addr; 787 ip4->sin_family = listen4->sin_family; 788 ip4->sin_addr.s_addr = dst->ip4.addr; 789 ip4->sin_port = listen4->sin_port; 790 791 ip4 = (struct sockaddr_in *) &addr->dst_addr; 792 ip4->sin_family = listen4->sin_family; 793 ip4->sin_addr.s_addr = src->ip4.addr; 794 ip4->sin_port = port; 795 break; 796 case 6: 797 listen6 = (struct sockaddr_in6 *) &listen_addr->src_addr; 798 ip6 = (struct sockaddr_in6 *) &addr->src_addr; 799 ip6->sin6_family = listen6->sin6_family; 800 ip6->sin6_addr = dst->ip6; 801 ip6->sin6_port = listen6->sin6_port; 802 803 ip6 = (struct sockaddr_in6 *) &addr->dst_addr; 804 ip6->sin6_family = listen6->sin6_family; 805 ip6->sin6_addr = src->ip6; 806 ip6->sin6_port = port; 807 break; 808 default: 809 break; 810 } 811} 812 813static inline int cma_user_data_offset(enum rdma_port_space ps) 814{ 815 switch (ps) { 816 case RDMA_PS_SDP: 817 return 0; 818 default: 819 return sizeof(struct cma_hdr); 820 } 821} 822 823static void cma_cancel_route(struct rdma_id_private *id_priv) 824{ 825 switch (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num)) { 826 case IB_LINK_LAYER_INFINIBAND: 827 if (id_priv->query) 828 ib_sa_cancel_query(id_priv->query_id, id_priv->query); 829 break; 830 default: 831 break; 832 } 833} 834 835static void cma_cancel_listens(struct rdma_id_private *id_priv) 836{ 837 struct rdma_id_private *dev_id_priv; 838 839 /* 840 * Remove from listen_any_list to prevent added devices from spawning 841 * additional listen requests. 842 */ 843 mutex_lock(&lock); 844 list_del(&id_priv->list); 845 846 while (!list_empty(&id_priv->listen_list)) { 847 dev_id_priv = list_entry(id_priv->listen_list.next, 848 struct rdma_id_private, listen_list); 849 /* sync with device removal to avoid duplicate destruction */ 850 list_del_init(&dev_id_priv->list); 851 list_del(&dev_id_priv->listen_list); 852 mutex_unlock(&lock); 853 854 rdma_destroy_id(&dev_id_priv->id); 855 mutex_lock(&lock); 856 } 857 mutex_unlock(&lock); 858} 859 860static void cma_cancel_operation(struct rdma_id_private *id_priv, 861 enum cma_state state) 862{ 863 switch (state) { 864 case CMA_ADDR_QUERY: 865 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr); 866 break; 867 case CMA_ROUTE_QUERY: 868 cma_cancel_route(id_priv); 869 break; 870 case CMA_LISTEN: 871 if (cma_any_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr) 872 && !id_priv->cma_dev) 873 cma_cancel_listens(id_priv); 874 break; 875 default: 876 break; 877 } 878} 879 880static void cma_release_port(struct rdma_id_private *id_priv) 881{ 882 struct rdma_bind_list *bind_list = id_priv->bind_list; 883 884 if (!bind_list) 885 return; 886 887 mutex_lock(&lock); 888 hlist_del(&id_priv->node); 889 if (hlist_empty(&bind_list->owners)) { 890 idr_remove(bind_list->ps, bind_list->port); 891 kfree(bind_list); 892 } 893 mutex_unlock(&lock); 894} 895 896static void cma_leave_mc_groups(struct rdma_id_private *id_priv) 897{ 898 struct cma_multicast *mc; 899 900 while (!list_empty(&id_priv->mc_list)) { 901 mc = container_of(id_priv->mc_list.next, 902 struct cma_multicast, list); 903 list_del(&mc->list); 904 switch (rdma_port_get_link_layer(id_priv->cma_dev->device, id_priv->id.port_num)) { 905 case IB_LINK_LAYER_INFINIBAND: 906 ib_sa_free_multicast(mc->multicast.ib); 907 kfree(mc); 908 break; 909 case IB_LINK_LAYER_ETHERNET: 910 kref_put(&mc->mcref, release_mc); 911 break; 912 default: 913 break; 914 } 915 } 916} 917 918void rdma_destroy_id(struct rdma_cm_id *id) 919{ 920 struct rdma_id_private *id_priv; 921 enum cma_state state; 922 923 id_priv = container_of(id, struct rdma_id_private, id); 924 state = cma_exch(id_priv, CMA_DESTROYING); 925 cma_cancel_operation(id_priv, state); 926 927 /* 928 * Wait for any active callback to finish. New callbacks will find 929 * the id_priv state set to destroying and abort. 930 */ 931 mutex_lock(&id_priv->handler_mutex); 932 mutex_unlock(&id_priv->handler_mutex); 933 934 if (id_priv->cma_dev) { 935 switch (rdma_node_get_transport(id_priv->id.device->node_type)) { 936 case RDMA_TRANSPORT_IB: 937 if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib)) 938 ib_destroy_cm_id(id_priv->cm_id.ib); 939 break; 940 case RDMA_TRANSPORT_IWARP: 941 if (id_priv->cm_id.iw && !IS_ERR(id_priv->cm_id.iw)) 942 iw_destroy_cm_id(id_priv->cm_id.iw); 943 break; 944 default: 945 break; 946 } 947 cma_leave_mc_groups(id_priv); 948 cma_release_dev(id_priv); 949 } 950 951 cma_release_port(id_priv); 952 cma_deref_id(id_priv); 953 wait_for_completion(&id_priv->comp); 954 955 if (id_priv->internal_id) 956 cma_deref_id(id_priv->id.context); 957 958 kfree(id_priv->id.route.path_rec); 959 kfree(id_priv); 960} 961EXPORT_SYMBOL(rdma_destroy_id); 962 963static int cma_rep_recv(struct rdma_id_private *id_priv) 964{ 965 int ret; 966 967 ret = cma_modify_qp_rtr(id_priv, NULL); 968 if (ret) 969 goto reject; 970 971 ret = cma_modify_qp_rts(id_priv, NULL); 972 if (ret) 973 goto reject; 974 975 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0); 976 if (ret) 977 goto reject; 978 979 return 0; 980reject: 981 cma_modify_qp_err(id_priv); 982 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED, 983 NULL, 0, NULL, 0); 984 return ret; 985} 986 987static int cma_verify_rep(struct rdma_id_private *id_priv, void *data) 988{ 989 if (id_priv->id.ps == RDMA_PS_SDP && 990 sdp_get_majv(((struct sdp_hah *) data)->sdp_version) != 991 SDP_MAJ_VERSION) 992 return -EINVAL; 993 994 return 0; 995} 996 997static void cma_set_rep_event_data(struct rdma_cm_event *event, 998 struct ib_cm_rep_event_param *rep_data, 999 void *private_data) 1000{ 1001 event->param.conn.private_data = private_data; 1002 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE; 1003 event->param.conn.responder_resources = rep_data->responder_resources; 1004 event->param.conn.initiator_depth = rep_data->initiator_depth; 1005 event->param.conn.flow_control = rep_data->flow_control; 1006 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count; 1007 event->param.conn.srq = rep_data->srq; 1008 event->param.conn.qp_num = rep_data->remote_qpn; 1009} 1010 1011static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) 1012{ 1013 struct rdma_id_private *id_priv = cm_id->context; 1014 struct rdma_cm_event event; 1015 int ret = 0; 1016 1017 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT && 1018 cma_disable_callback(id_priv, CMA_CONNECT)) || 1019 (ib_event->event == IB_CM_TIMEWAIT_EXIT && 1020 cma_disable_callback(id_priv, CMA_DISCONNECT))) 1021 return 0; 1022 1023 memset(&event, 0, sizeof event); 1024 switch (ib_event->event) { 1025 case IB_CM_REQ_ERROR: 1026 case IB_CM_REP_ERROR: 1027 event.event = RDMA_CM_EVENT_UNREACHABLE; 1028 event.status = -ETIMEDOUT; 1029 break; 1030 case IB_CM_REP_RECEIVED: 1031 event.status = cma_verify_rep(id_priv, ib_event->private_data); 1032 if (event.status) 1033 event.event = RDMA_CM_EVENT_CONNECT_ERROR; 1034 else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) { 1035 event.status = cma_rep_recv(id_priv); 1036 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR : 1037 RDMA_CM_EVENT_ESTABLISHED; 1038 } else 1039 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE; 1040 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd, 1041 ib_event->private_data); 1042 break; 1043 case IB_CM_RTU_RECEIVED: 1044 case IB_CM_USER_ESTABLISHED: 1045 event.event = RDMA_CM_EVENT_ESTABLISHED; 1046 break; 1047 case IB_CM_DREQ_ERROR: 1048 event.status = -ETIMEDOUT; /* fall through */ 1049 case IB_CM_DREQ_RECEIVED: 1050 case IB_CM_DREP_RECEIVED: 1051 if (!cma_comp_exch(id_priv, CMA_CONNECT, CMA_DISCONNECT)) 1052 goto out; 1053 event.event = RDMA_CM_EVENT_DISCONNECTED; 1054 break; 1055 case IB_CM_TIMEWAIT_EXIT: 1056 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT; 1057 break; 1058 case IB_CM_MRA_RECEIVED: 1059 /* ignore event */ 1060 goto out; 1061 case IB_CM_REJ_RECEIVED: 1062 cma_modify_qp_err(id_priv); 1063 event.status = ib_event->param.rej_rcvd.reason; 1064 event.event = RDMA_CM_EVENT_REJECTED; 1065 event.param.conn.private_data = ib_event->private_data; 1066 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE; 1067 break; 1068 default: 1069 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n", 1070 ib_event->event); 1071 goto out; 1072 } 1073 1074 ret = id_priv->id.event_handler(&id_priv->id, &event); 1075 if (ret) { 1076 /* Destroy the CM ID by returning a non-zero value. */ 1077 id_priv->cm_id.ib = NULL; 1078 cma_exch(id_priv, CMA_DESTROYING); 1079 mutex_unlock(&id_priv->handler_mutex); 1080 rdma_destroy_id(&id_priv->id); 1081 return ret; 1082 } 1083out: 1084 mutex_unlock(&id_priv->handler_mutex); 1085 return ret; 1086} 1087 1088static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id, 1089 struct ib_cm_event *ib_event) 1090{ 1091 struct rdma_id_private *id_priv; 1092 struct rdma_cm_id *id; 1093 struct rdma_route *rt; 1094 union cma_ip_addr *src, *dst; 1095 __be16 port; 1096 u8 ip_ver; 1097 int ret; 1098 1099 if (cma_get_net_info(ib_event->private_data, listen_id->ps, 1100 &ip_ver, &port, &src, &dst)) 1101 goto err; 1102 1103 id = rdma_create_id(listen_id->event_handler, listen_id->context, 1104 listen_id->ps); 1105 if (IS_ERR(id)) 1106 goto err; 1107 1108 cma_save_net_info(&id->route.addr, &listen_id->route.addr, 1109 ip_ver, port, src, dst); 1110 1111 rt = &id->route; 1112 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1; 1113 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths, 1114 GFP_KERNEL); 1115 if (!rt->path_rec) 1116 goto destroy_id; 1117 1118 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path; 1119 if (rt->num_paths == 2) 1120 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path; 1121 1122 if (cma_any_addr((struct sockaddr *) &rt->addr.src_addr)) { 1123 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND; 1124 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid); 1125 ib_addr_set_pkey(&rt->addr.dev_addr, rt->path_rec[0].pkey); 1126 } else { 1127 ret = rdma_translate_ip((struct sockaddr *) &rt->addr.src_addr, 1128 &rt->addr.dev_addr); 1129 if (ret) 1130 goto destroy_id; 1131 } 1132 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid); 1133 1134 id_priv = container_of(id, struct rdma_id_private, id); 1135 id_priv->state = CMA_CONNECT; 1136 return id_priv; 1137 1138destroy_id: 1139 rdma_destroy_id(id); 1140err: 1141 return NULL; 1142} 1143 1144static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id, 1145 struct ib_cm_event *ib_event) 1146{ 1147 struct rdma_id_private *id_priv; 1148 struct rdma_cm_id *id; 1149 union cma_ip_addr *src, *dst; 1150 __be16 port; 1151 u8 ip_ver; 1152 int ret; 1153 1154 id = rdma_create_id(listen_id->event_handler, listen_id->context, 1155 listen_id->ps); 1156 if (IS_ERR(id)) 1157 return NULL; 1158 1159 1160 if (cma_get_net_info(ib_event->private_data, listen_id->ps, 1161 &ip_ver, &port, &src, &dst)) 1162 goto err; 1163 1164 cma_save_net_info(&id->route.addr, &listen_id->route.addr, 1165 ip_ver, port, src, dst); 1166 1167 if (!cma_any_addr((struct sockaddr *) &id->route.addr.src_addr)) { 1168 ret = rdma_translate_ip((struct sockaddr *) &id->route.addr.src_addr, 1169 &id->route.addr.dev_addr); 1170 if (ret) 1171 goto err; 1172 } 1173 1174 id_priv = container_of(id, struct rdma_id_private, id); 1175 id_priv->state = CMA_CONNECT; 1176 return id_priv; 1177err: 1178 rdma_destroy_id(id); 1179 return NULL; 1180} 1181 1182static void cma_set_req_event_data(struct rdma_cm_event *event, 1183 struct ib_cm_req_event_param *req_data, 1184 void *private_data, int offset) 1185{ 1186 event->param.conn.private_data = private_data + offset; 1187 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset; 1188 event->param.conn.responder_resources = req_data->responder_resources; 1189 event->param.conn.initiator_depth = req_data->initiator_depth; 1190 event->param.conn.flow_control = req_data->flow_control; 1191 event->param.conn.retry_count = req_data->retry_count; 1192 event->param.conn.rnr_retry_count = req_data->rnr_retry_count; 1193 event->param.conn.srq = req_data->srq; 1194 event->param.conn.qp_num = req_data->remote_qpn; 1195} 1196 1197static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) 1198{ 1199 struct rdma_id_private *listen_id, *conn_id; 1200 struct rdma_cm_event event; 1201 int offset, ret; 1202 1203 listen_id = cm_id->context; 1204 if (cma_disable_callback(listen_id, CMA_LISTEN)) 1205 return -ECONNABORTED; 1206 1207 memset(&event, 0, sizeof event); 1208 offset = cma_user_data_offset(listen_id->id.ps); 1209 event.event = RDMA_CM_EVENT_CONNECT_REQUEST; 1210 if (cma_is_ud_ps(listen_id->id.ps)) { 1211 conn_id = cma_new_udp_id(&listen_id->id, ib_event); 1212 event.param.ud.private_data = ib_event->private_data + offset; 1213 event.param.ud.private_data_len = 1214 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset; 1215 } else { 1216 conn_id = cma_new_conn_id(&listen_id->id, ib_event); 1217 cma_set_req_event_data(&event, &ib_event->param.req_rcvd, 1218 ib_event->private_data, offset); 1219 } 1220 if (!conn_id) { 1221 ret = -ENOMEM; 1222 goto out; 1223 } 1224 1225 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING); 1226 ret = cma_acquire_dev(conn_id); 1227 if (ret) 1228 goto release_conn_id; 1229 1230 conn_id->cm_id.ib = cm_id; 1231 cm_id->context = conn_id; 1232 cm_id->cm_handler = cma_ib_handler; 1233 1234 /* 1235 * Protect against the user destroying conn_id from another thread 1236 * until we're done accessing it. 1237 */ 1238 atomic_inc(&conn_id->refcount); 1239 ret = conn_id->id.event_handler(&conn_id->id, &event); 1240 if (!ret) { 1241 /* 1242 * Acquire mutex to prevent user executing rdma_destroy_id() 1243 * while we're accessing the cm_id. 1244 */ 1245 mutex_lock(&lock); 1246 if (cma_comp(conn_id, CMA_CONNECT) && 1247 !cma_is_ud_ps(conn_id->id.ps)) 1248 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0); 1249 mutex_unlock(&lock); 1250 mutex_unlock(&conn_id->handler_mutex); 1251 cma_deref_id(conn_id); 1252 goto out; 1253 } 1254 cma_deref_id(conn_id); 1255 1256 /* Destroy the CM ID by returning a non-zero value. */ 1257 conn_id->cm_id.ib = NULL; 1258 1259release_conn_id: 1260 cma_exch(conn_id, CMA_DESTROYING); 1261 mutex_unlock(&conn_id->handler_mutex); 1262 rdma_destroy_id(&conn_id->id); 1263 1264out: 1265 mutex_unlock(&listen_id->handler_mutex); 1266 return ret; 1267} 1268 1269static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr) 1270{ 1271 return cpu_to_be64(((u64)ps << 16) + be16_to_cpu(cma_port(addr))); 1272} 1273 1274static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr, 1275 struct ib_cm_compare_data *compare) 1276{ 1277 struct cma_hdr *cma_data, *cma_mask; 1278 struct sdp_hh *sdp_data, *sdp_mask; 1279 __be32 ip4_addr; 1280 struct in6_addr ip6_addr; 1281 1282 memset(compare, 0, sizeof *compare); 1283 cma_data = (void *) compare->data; 1284 cma_mask = (void *) compare->mask; 1285 sdp_data = (void *) compare->data; 1286 sdp_mask = (void *) compare->mask; 1287 1288 switch (addr->sa_family) { 1289 case AF_INET: 1290 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr; 1291 if (ps == RDMA_PS_SDP) { 1292 sdp_set_ip_ver(sdp_data, 4); 1293 sdp_set_ip_ver(sdp_mask, 0xF); 1294 sdp_data->dst_addr.ip4.addr = ip4_addr; 1295 sdp_mask->dst_addr.ip4.addr = htonl(~0); 1296 } else { 1297 cma_set_ip_ver(cma_data, 4); 1298 cma_set_ip_ver(cma_mask, 0xF); 1299 cma_data->dst_addr.ip4.addr = ip4_addr; 1300 cma_mask->dst_addr.ip4.addr = htonl(~0); 1301 } 1302 break; 1303 case AF_INET6: 1304 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr; 1305 if (ps == RDMA_PS_SDP) { 1306 sdp_set_ip_ver(sdp_data, 6); 1307 sdp_set_ip_ver(sdp_mask, 0xF); 1308 sdp_data->dst_addr.ip6 = ip6_addr; 1309 memset(&sdp_mask->dst_addr.ip6, 0xFF, 1310 sizeof sdp_mask->dst_addr.ip6); 1311 } else { 1312 cma_set_ip_ver(cma_data, 6); 1313 cma_set_ip_ver(cma_mask, 0xF); 1314 cma_data->dst_addr.ip6 = ip6_addr; 1315 memset(&cma_mask->dst_addr.ip6, 0xFF, 1316 sizeof cma_mask->dst_addr.ip6); 1317 } 1318 break; 1319 default: 1320 break; 1321 } 1322} 1323 1324static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event) 1325{ 1326 struct rdma_id_private *id_priv = iw_id->context; 1327 struct rdma_cm_event event; 1328 struct sockaddr_in *sin; 1329 int ret = 0; 1330 1331 if (cma_disable_callback(id_priv, CMA_CONNECT)) 1332 return 0; 1333 1334 memset(&event, 0, sizeof event); 1335 switch (iw_event->event) { 1336 case IW_CM_EVENT_CLOSE: 1337 event.event = RDMA_CM_EVENT_DISCONNECTED; 1338 break; 1339 case IW_CM_EVENT_CONNECT_REPLY: 1340 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; 1341 *sin = iw_event->local_addr; 1342 sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr; 1343 *sin = iw_event->remote_addr; 1344 switch (iw_event->status) { 1345 case 0: 1346 event.event = RDMA_CM_EVENT_ESTABLISHED; 1347 break; 1348 case -ECONNRESET: 1349 case -ECONNREFUSED: 1350 event.event = RDMA_CM_EVENT_REJECTED; 1351 break; 1352 case -ETIMEDOUT: 1353 event.event = RDMA_CM_EVENT_UNREACHABLE; 1354 break; 1355 default: 1356 event.event = RDMA_CM_EVENT_CONNECT_ERROR; 1357 break; 1358 } 1359 break; 1360 case IW_CM_EVENT_ESTABLISHED: 1361 event.event = RDMA_CM_EVENT_ESTABLISHED; 1362 break; 1363 default: 1364 BUG_ON(1); 1365 } 1366 1367 event.status = iw_event->status; 1368 event.param.conn.private_data = iw_event->private_data; 1369 event.param.conn.private_data_len = iw_event->private_data_len; 1370 ret = id_priv->id.event_handler(&id_priv->id, &event); 1371 if (ret) { 1372 /* Destroy the CM ID by returning a non-zero value. */ 1373 id_priv->cm_id.iw = NULL; 1374 cma_exch(id_priv, CMA_DESTROYING); 1375 mutex_unlock(&id_priv->handler_mutex); 1376 rdma_destroy_id(&id_priv->id); 1377 return ret; 1378 } 1379 1380 mutex_unlock(&id_priv->handler_mutex); 1381 return ret; 1382} 1383 1384static int iw_conn_req_handler(struct iw_cm_id *cm_id, 1385 struct iw_cm_event *iw_event) 1386{ 1387 struct rdma_cm_id *new_cm_id; 1388 struct rdma_id_private *listen_id, *conn_id; 1389 struct sockaddr_in *sin; 1390 struct net_device *dev = NULL; 1391 struct rdma_cm_event event; 1392 int ret; 1393 struct ib_device_attr attr; 1394 1395 listen_id = cm_id->context; 1396 if (cma_disable_callback(listen_id, CMA_LISTEN)) 1397 return -ECONNABORTED; 1398 1399 /* Create a new RDMA id for the new IW CM ID */ 1400 new_cm_id = rdma_create_id(listen_id->id.event_handler, 1401 listen_id->id.context, 1402 RDMA_PS_TCP); 1403 if (IS_ERR(new_cm_id)) { 1404 ret = -ENOMEM; 1405 goto out; 1406 } 1407 conn_id = container_of(new_cm_id, struct rdma_id_private, id); 1408 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING); 1409 conn_id->state = CMA_CONNECT; 1410 1411 dev = ip_dev_find(&init_net, iw_event->local_addr.sin_addr.s_addr); 1412 if (!dev) { 1413 ret = -EADDRNOTAVAIL; 1414 mutex_unlock(&conn_id->handler_mutex); 1415 rdma_destroy_id(new_cm_id); 1416 goto out; 1417 } 1418 ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL); 1419 if (ret) { 1420 mutex_unlock(&conn_id->handler_mutex); 1421 rdma_destroy_id(new_cm_id); 1422 goto out; 1423 } 1424 1425 ret = cma_acquire_dev(conn_id); 1426 if (ret) { 1427 mutex_unlock(&conn_id->handler_mutex); 1428 rdma_destroy_id(new_cm_id); 1429 goto out; 1430 } 1431 1432 conn_id->cm_id.iw = cm_id; 1433 cm_id->context = conn_id; 1434 cm_id->cm_handler = cma_iw_handler; 1435 1436 sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr; 1437 *sin = iw_event->local_addr; 1438 sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr; 1439 *sin = iw_event->remote_addr; 1440 1441 ret = ib_query_device(conn_id->id.device, &attr); 1442 if (ret) { 1443 mutex_unlock(&conn_id->handler_mutex); 1444 rdma_destroy_id(new_cm_id); 1445 goto out; 1446 } 1447 1448 memset(&event, 0, sizeof event); 1449 event.event = RDMA_CM_EVENT_CONNECT_REQUEST; 1450 event.param.conn.private_data = iw_event->private_data; 1451 event.param.conn.private_data_len = iw_event->private_data_len; 1452 event.param.conn.initiator_depth = attr.max_qp_init_rd_atom; 1453 event.param.conn.responder_resources = attr.max_qp_rd_atom; 1454 1455 /* 1456 * Protect against the user destroying conn_id from another thread 1457 * until we're done accessing it. 1458 */ 1459 atomic_inc(&conn_id->refcount); 1460 ret = conn_id->id.event_handler(&conn_id->id, &event); 1461 if (ret) { 1462 /* User wants to destroy the CM ID */ 1463 conn_id->cm_id.iw = NULL; 1464 cma_exch(conn_id, CMA_DESTROYING); 1465 mutex_unlock(&conn_id->handler_mutex); 1466 cma_deref_id(conn_id); 1467 rdma_destroy_id(&conn_id->id); 1468 goto out; 1469 } 1470 1471 mutex_unlock(&conn_id->handler_mutex); 1472 cma_deref_id(conn_id); 1473 1474out: 1475 if (dev) 1476 dev_put(dev); 1477 mutex_unlock(&listen_id->handler_mutex); 1478 return ret; 1479} 1480 1481static int cma_ib_listen(struct rdma_id_private *id_priv) 1482{ 1483 struct ib_cm_compare_data compare_data; 1484 struct sockaddr *addr; 1485 __be64 svc_id; 1486 int ret; 1487 1488 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_req_handler, 1489 id_priv); 1490 if (IS_ERR(id_priv->cm_id.ib)) 1491 return PTR_ERR(id_priv->cm_id.ib); 1492 1493 addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr; 1494 svc_id = cma_get_service_id(id_priv->id.ps, addr); 1495 if (cma_any_addr(addr)) 1496 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL); 1497 else { 1498 cma_set_compare_data(id_priv->id.ps, addr, &compare_data); 1499 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data); 1500 } 1501 1502 if (ret) { 1503 ib_destroy_cm_id(id_priv->cm_id.ib); 1504 id_priv->cm_id.ib = NULL; 1505 } 1506 1507 return ret; 1508} 1509 1510static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog) 1511{ 1512 int ret; 1513 struct sockaddr_in *sin; 1514 1515 id_priv->cm_id.iw = iw_create_cm_id(id_priv->id.device, 1516 iw_conn_req_handler, 1517 id_priv); 1518 if (IS_ERR(id_priv->cm_id.iw)) 1519 return PTR_ERR(id_priv->cm_id.iw); 1520 1521 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; 1522 id_priv->cm_id.iw->local_addr = *sin; 1523 1524 ret = iw_cm_listen(id_priv->cm_id.iw, backlog); 1525 1526 if (ret) { 1527 iw_destroy_cm_id(id_priv->cm_id.iw); 1528 id_priv->cm_id.iw = NULL; 1529 } 1530 1531 return ret; 1532} 1533 1534static int cma_listen_handler(struct rdma_cm_id *id, 1535 struct rdma_cm_event *event) 1536{ 1537 struct rdma_id_private *id_priv = id->context; 1538 1539 id->context = id_priv->id.context; 1540 id->event_handler = id_priv->id.event_handler; 1541 return id_priv->id.event_handler(id, event); 1542} 1543 1544static void cma_listen_on_dev(struct rdma_id_private *id_priv, 1545 struct cma_device *cma_dev) 1546{ 1547 struct rdma_id_private *dev_id_priv; 1548 struct rdma_cm_id *id; 1549 int ret; 1550 1551 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps); 1552 if (IS_ERR(id)) 1553 return; 1554 1555 dev_id_priv = container_of(id, struct rdma_id_private, id); 1556 1557 dev_id_priv->state = CMA_ADDR_BOUND; 1558 memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr, 1559 ip_addr_size((struct sockaddr *) &id_priv->id.route.addr.src_addr)); 1560 1561 cma_attach_to_dev(dev_id_priv, cma_dev); 1562 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list); 1563 atomic_inc(&id_priv->refcount); 1564 dev_id_priv->internal_id = 1; 1565 1566 ret = rdma_listen(id, id_priv->backlog); 1567 if (ret) 1568 printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, " 1569 "listening on device %s\n", ret, cma_dev->device->name); 1570} 1571 1572static void cma_listen_on_all(struct rdma_id_private *id_priv) 1573{ 1574 struct cma_device *cma_dev; 1575 1576 mutex_lock(&lock); 1577 list_add_tail(&id_priv->list, &listen_any_list); 1578 list_for_each_entry(cma_dev, &dev_list, list) 1579 cma_listen_on_dev(id_priv, cma_dev); 1580 mutex_unlock(&lock); 1581} 1582 1583void rdma_set_service_type(struct rdma_cm_id *id, int tos) 1584{ 1585 struct rdma_id_private *id_priv; 1586 1587 id_priv = container_of(id, struct rdma_id_private, id); 1588 id_priv->tos = (u8) tos; 1589} 1590EXPORT_SYMBOL(rdma_set_service_type); 1591 1592static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec, 1593 void *context) 1594{ 1595 struct cma_work *work = context; 1596 struct rdma_route *route; 1597 1598 route = &work->id->id.route; 1599 1600 if (!status) { 1601 route->num_paths = 1; 1602 *route->path_rec = *path_rec; 1603 } else { 1604 work->old_state = CMA_ROUTE_QUERY; 1605 work->new_state = CMA_ADDR_RESOLVED; 1606 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR; 1607 work->event.status = status; 1608 } 1609 1610 queue_work(cma_wq, &work->work); 1611} 1612 1613static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms, 1614 struct cma_work *work) 1615{ 1616 struct rdma_addr *addr = &id_priv->id.route.addr; 1617 struct ib_sa_path_rec path_rec; 1618 ib_sa_comp_mask comp_mask; 1619 struct sockaddr_in6 *sin6; 1620 1621 memset(&path_rec, 0, sizeof path_rec); 1622 rdma_addr_get_sgid(&addr->dev_addr, &path_rec.sgid); 1623 rdma_addr_get_dgid(&addr->dev_addr, &path_rec.dgid); 1624 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(&addr->dev_addr)); 1625 path_rec.numb_path = 1; 1626 path_rec.reversible = 1; 1627 path_rec.service_id = cma_get_service_id(id_priv->id.ps, 1628 (struct sockaddr *) &addr->dst_addr); 1629 1630 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID | 1631 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH | 1632 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID; 1633 1634 if (addr->src_addr.ss_family == AF_INET) { 1635 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos); 1636 comp_mask |= IB_SA_PATH_REC_QOS_CLASS; 1637 } else { 1638 sin6 = (struct sockaddr_in6 *) &addr->src_addr; 1639 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20); 1640 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS; 1641 } 1642 1643 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device, 1644 id_priv->id.port_num, &path_rec, 1645 comp_mask, timeout_ms, 1646 GFP_KERNEL, cma_query_handler, 1647 work, &id_priv->query); 1648 1649 return (id_priv->query_id < 0) ? id_priv->query_id : 0; 1650} 1651 1652static void cma_work_handler(struct work_struct *_work) 1653{ 1654 struct cma_work *work = container_of(_work, struct cma_work, work); 1655 struct rdma_id_private *id_priv = work->id; 1656 int destroy = 0; 1657 1658 mutex_lock(&id_priv->handler_mutex); 1659 if (!cma_comp_exch(id_priv, work->old_state, work->new_state)) 1660 goto out; 1661 1662 if (id_priv->id.event_handler(&id_priv->id, &work->event)) { 1663 cma_exch(id_priv, CMA_DESTROYING); 1664 destroy = 1; 1665 } 1666out: 1667 mutex_unlock(&id_priv->handler_mutex); 1668 cma_deref_id(id_priv); 1669 if (destroy) 1670 rdma_destroy_id(&id_priv->id); 1671 kfree(work); 1672} 1673 1674static void cma_ndev_work_handler(struct work_struct *_work) 1675{ 1676 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work); 1677 struct rdma_id_private *id_priv = work->id; 1678 int destroy = 0; 1679 1680 mutex_lock(&id_priv->handler_mutex); 1681 if (id_priv->state == CMA_DESTROYING || 1682 id_priv->state == CMA_DEVICE_REMOVAL) 1683 goto out; 1684 1685 if (id_priv->id.event_handler(&id_priv->id, &work->event)) { 1686 cma_exch(id_priv, CMA_DESTROYING); 1687 destroy = 1; 1688 } 1689 1690out: 1691 mutex_unlock(&id_priv->handler_mutex); 1692 cma_deref_id(id_priv); 1693 if (destroy) 1694 rdma_destroy_id(&id_priv->id); 1695 kfree(work); 1696} 1697 1698static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms) 1699{ 1700 struct rdma_route *route = &id_priv->id.route; 1701 struct cma_work *work; 1702 int ret; 1703 1704 work = kzalloc(sizeof *work, GFP_KERNEL); 1705 if (!work) 1706 return -ENOMEM; 1707 1708 work->id = id_priv; 1709 INIT_WORK(&work->work, cma_work_handler); 1710 work->old_state = CMA_ROUTE_QUERY; 1711 work->new_state = CMA_ROUTE_RESOLVED; 1712 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 1713 1714 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL); 1715 if (!route->path_rec) { 1716 ret = -ENOMEM; 1717 goto err1; 1718 } 1719 1720 ret = cma_query_ib_route(id_priv, timeout_ms, work); 1721 if (ret) 1722 goto err2; 1723 1724 return 0; 1725err2: 1726 kfree(route->path_rec); 1727 route->path_rec = NULL; 1728err1: 1729 kfree(work); 1730 return ret; 1731} 1732 1733int rdma_set_ib_paths(struct rdma_cm_id *id, 1734 struct ib_sa_path_rec *path_rec, int num_paths) 1735{ 1736 struct rdma_id_private *id_priv; 1737 int ret; 1738 1739 id_priv = container_of(id, struct rdma_id_private, id); 1740 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_RESOLVED)) 1741 return -EINVAL; 1742 1743 id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths, 1744 GFP_KERNEL); 1745 if (!id->route.path_rec) { 1746 ret = -ENOMEM; 1747 goto err; 1748 } 1749 1750 id->route.num_paths = num_paths; 1751 return 0; 1752err: 1753 cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_ADDR_RESOLVED); 1754 return ret; 1755} 1756EXPORT_SYMBOL(rdma_set_ib_paths); 1757 1758static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms) 1759{ 1760 struct cma_work *work; 1761 1762 work = kzalloc(sizeof *work, GFP_KERNEL); 1763 if (!work) 1764 return -ENOMEM; 1765 1766 work->id = id_priv; 1767 INIT_WORK(&work->work, cma_work_handler); 1768 work->old_state = CMA_ROUTE_QUERY; 1769 work->new_state = CMA_ROUTE_RESOLVED; 1770 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 1771 queue_work(cma_wq, &work->work); 1772 return 0; 1773} 1774 1775static int cma_resolve_iboe_route(struct rdma_id_private *id_priv) 1776{ 1777 struct rdma_route *route = &id_priv->id.route; 1778 struct rdma_addr *addr = &route->addr; 1779 struct cma_work *work; 1780 int ret; 1781 struct sockaddr_in *src_addr = (struct sockaddr_in *)&route->addr.src_addr; 1782 struct sockaddr_in *dst_addr = (struct sockaddr_in *)&route->addr.dst_addr; 1783 struct net_device *ndev = NULL; 1784 u16 vid; 1785 1786 if (src_addr->sin_family != dst_addr->sin_family) 1787 return -EINVAL; 1788 1789 work = kzalloc(sizeof *work, GFP_KERNEL); 1790 if (!work) 1791 return -ENOMEM; 1792 1793 work->id = id_priv; 1794 INIT_WORK(&work->work, cma_work_handler); 1795 1796 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL); 1797 if (!route->path_rec) { 1798 ret = -ENOMEM; 1799 goto err1; 1800 } 1801 1802 route->num_paths = 1; 1803 1804 if (addr->dev_addr.bound_dev_if) 1805 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if); 1806 if (!ndev) { 1807 ret = -ENODEV; 1808 goto err2; 1809 } 1810 1811 vid = rdma_vlan_dev_vlan_id(ndev); 1812 1813 iboe_mac_vlan_to_ll(&route->path_rec->sgid, addr->dev_addr.src_dev_addr, vid); 1814 iboe_mac_vlan_to_ll(&route->path_rec->dgid, addr->dev_addr.dst_dev_addr, vid); 1815 1816 route->path_rec->hop_limit = 1; 1817 route->path_rec->reversible = 1; 1818 route->path_rec->pkey = cpu_to_be16(0xffff); 1819 route->path_rec->mtu_selector = IB_SA_EQ; 1820 route->path_rec->sl = id_priv->tos >> 5; 1821 1822 route->path_rec->mtu = iboe_get_mtu(ndev->mtu); 1823 route->path_rec->rate_selector = IB_SA_EQ; 1824 route->path_rec->rate = iboe_get_rate(ndev); 1825 dev_put(ndev); 1826 route->path_rec->packet_life_time_selector = IB_SA_EQ; 1827 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME; 1828 if (!route->path_rec->mtu) { 1829 ret = -EINVAL; 1830 goto err2; 1831 } 1832 1833 work->old_state = CMA_ROUTE_QUERY; 1834 work->new_state = CMA_ROUTE_RESOLVED; 1835 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 1836 work->event.status = 0; 1837 1838 queue_work(cma_wq, &work->work); 1839 1840 return 0; 1841 1842err2: 1843 kfree(route->path_rec); 1844 route->path_rec = NULL; 1845err1: 1846 kfree(work); 1847 return ret; 1848} 1849 1850int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms) 1851{ 1852 struct rdma_id_private *id_priv; 1853 int ret; 1854 1855 id_priv = container_of(id, struct rdma_id_private, id); 1856 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_QUERY)) 1857 return -EINVAL; 1858 1859 atomic_inc(&id_priv->refcount); 1860 switch (rdma_node_get_transport(id->device->node_type)) { 1861 case RDMA_TRANSPORT_IB: 1862 switch (rdma_port_get_link_layer(id->device, id->port_num)) { 1863 case IB_LINK_LAYER_INFINIBAND: 1864 ret = cma_resolve_ib_route(id_priv, timeout_ms); 1865 break; 1866 case IB_LINK_LAYER_ETHERNET: 1867 ret = cma_resolve_iboe_route(id_priv); 1868 break; 1869 default: 1870 ret = -ENOSYS; 1871 } 1872 break; 1873 case RDMA_TRANSPORT_IWARP: 1874 ret = cma_resolve_iw_route(id_priv, timeout_ms); 1875 break; 1876 default: 1877 ret = -ENOSYS; 1878 break; 1879 } 1880 if (ret) 1881 goto err; 1882 1883 return 0; 1884err: 1885 cma_comp_exch(id_priv, CMA_ROUTE_QUERY, CMA_ADDR_RESOLVED); 1886 cma_deref_id(id_priv); 1887 return ret; 1888} 1889EXPORT_SYMBOL(rdma_resolve_route); 1890 1891static int cma_bind_loopback(struct rdma_id_private *id_priv) 1892{ 1893 struct cma_device *cma_dev; 1894 struct ib_port_attr port_attr; 1895 union ib_gid gid; 1896 u16 pkey; 1897 int ret; 1898 u8 p; 1899 1900 mutex_lock(&lock); 1901 if (list_empty(&dev_list)) { 1902 ret = -ENODEV; 1903 goto out; 1904 } 1905 list_for_each_entry(cma_dev, &dev_list, list) 1906 for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p) 1907 if (!ib_query_port(cma_dev->device, p, &port_attr) && 1908 port_attr.state == IB_PORT_ACTIVE) 1909 goto port_found; 1910 1911 p = 1; 1912 cma_dev = list_entry(dev_list.next, struct cma_device, list); 1913 1914port_found: 1915 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid); 1916 if (ret) 1917 goto out; 1918 1919 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey); 1920 if (ret) 1921 goto out; 1922 1923 id_priv->id.route.addr.dev_addr.dev_type = 1924 (rdma_port_get_link_layer(cma_dev->device, p) == IB_LINK_LAYER_INFINIBAND) ? 1925 ARPHRD_INFINIBAND : ARPHRD_ETHER; 1926 1927 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid); 1928 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey); 1929 id_priv->id.port_num = p; 1930 cma_attach_to_dev(id_priv, cma_dev); 1931out: 1932 mutex_unlock(&lock); 1933 return ret; 1934} 1935 1936static void addr_handler(int status, struct sockaddr *src_addr, 1937 struct rdma_dev_addr *dev_addr, void *context) 1938{ 1939 struct rdma_id_private *id_priv = context; 1940 struct rdma_cm_event event; 1941 1942 memset(&event, 0, sizeof event); 1943 mutex_lock(&id_priv->handler_mutex); 1944 if (!cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_RESOLVED)) 1945 goto out; 1946 1947 if (!status && !id_priv->cma_dev) 1948 status = cma_acquire_dev(id_priv); 1949 1950 if (status) { 1951 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ADDR_BOUND)) 1952 goto out; 1953 event.event = RDMA_CM_EVENT_ADDR_ERROR; 1954 event.status = status; 1955 } else { 1956 memcpy(&id_priv->id.route.addr.src_addr, src_addr, 1957 ip_addr_size(src_addr)); 1958 event.event = RDMA_CM_EVENT_ADDR_RESOLVED; 1959 } 1960 1961 if (id_priv->id.event_handler(&id_priv->id, &event)) { 1962 cma_exch(id_priv, CMA_DESTROYING); 1963 mutex_unlock(&id_priv->handler_mutex); 1964 cma_deref_id(id_priv); 1965 rdma_destroy_id(&id_priv->id); 1966 return; 1967 } 1968out: 1969 mutex_unlock(&id_priv->handler_mutex); 1970 cma_deref_id(id_priv); 1971} 1972 1973static int cma_resolve_loopback(struct rdma_id_private *id_priv) 1974{ 1975 struct cma_work *work; 1976 struct sockaddr *src, *dst; 1977 union ib_gid gid; 1978 int ret; 1979 1980 work = kzalloc(sizeof *work, GFP_KERNEL); 1981 if (!work) 1982 return -ENOMEM; 1983 1984 if (!id_priv->cma_dev) { 1985 ret = cma_bind_loopback(id_priv); 1986 if (ret) 1987 goto err; 1988 } 1989 1990 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid); 1991 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid); 1992 1993 src = (struct sockaddr *) &id_priv->id.route.addr.src_addr; 1994 if (cma_zero_addr(src)) { 1995 dst = (struct sockaddr *) &id_priv->id.route.addr.dst_addr; 1996 if ((src->sa_family = dst->sa_family) == AF_INET) { 1997 ((struct sockaddr_in *) src)->sin_addr.s_addr = 1998 ((struct sockaddr_in *) dst)->sin_addr.s_addr; 1999 } else { 2000 ipv6_addr_copy(&((struct sockaddr_in6 *) src)->sin6_addr, 2001 &((struct sockaddr_in6 *) dst)->sin6_addr); 2002 } 2003 } 2004 2005 work->id = id_priv; 2006 INIT_WORK(&work->work, cma_work_handler); 2007 work->old_state = CMA_ADDR_QUERY; 2008 work->new_state = CMA_ADDR_RESOLVED; 2009 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED; 2010 queue_work(cma_wq, &work->work); 2011 return 0; 2012err: 2013 kfree(work); 2014 return ret; 2015} 2016 2017static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, 2018 struct sockaddr *dst_addr) 2019{ 2020 if (!src_addr || !src_addr->sa_family) { 2021 src_addr = (struct sockaddr *) &id->route.addr.src_addr; 2022 if ((src_addr->sa_family = dst_addr->sa_family) == AF_INET6) { 2023 ((struct sockaddr_in6 *) src_addr)->sin6_scope_id = 2024 ((struct sockaddr_in6 *) dst_addr)->sin6_scope_id; 2025 } 2026 } 2027 return rdma_bind_addr(id, src_addr); 2028} 2029 2030int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, 2031 struct sockaddr *dst_addr, int timeout_ms) 2032{ 2033 struct rdma_id_private *id_priv; 2034 int ret; 2035 2036 id_priv = container_of(id, struct rdma_id_private, id); 2037 if (id_priv->state == CMA_IDLE) { 2038 ret = cma_bind_addr(id, src_addr, dst_addr); 2039 if (ret) 2040 return ret; 2041 } 2042 2043 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_ADDR_QUERY)) 2044 return -EINVAL; 2045 2046 atomic_inc(&id_priv->refcount); 2047 memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr)); 2048 if (cma_any_addr(dst_addr)) 2049 ret = cma_resolve_loopback(id_priv); 2050 else 2051 ret = rdma_resolve_ip(&addr_client, (struct sockaddr *) &id->route.addr.src_addr, 2052 dst_addr, &id->route.addr.dev_addr, 2053 timeout_ms, addr_handler, id_priv); 2054 if (ret) 2055 goto err; 2056 2057 return 0; 2058err: 2059 cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_BOUND); 2060 cma_deref_id(id_priv); 2061 return ret; 2062} 2063EXPORT_SYMBOL(rdma_resolve_addr); 2064 2065int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse) 2066{ 2067 struct rdma_id_private *id_priv; 2068 unsigned long flags; 2069 int ret; 2070 2071 id_priv = container_of(id, struct rdma_id_private, id); 2072 spin_lock_irqsave(&id_priv->lock, flags); 2073 if (id_priv->state == CMA_IDLE) { 2074 id_priv->reuseaddr = reuse; 2075 ret = 0; 2076 } else { 2077 ret = -EINVAL; 2078 } 2079 spin_unlock_irqrestore(&id_priv->lock, flags); 2080 return ret; 2081} 2082EXPORT_SYMBOL(rdma_set_reuseaddr); 2083 2084static void cma_bind_port(struct rdma_bind_list *bind_list, 2085 struct rdma_id_private *id_priv) 2086{ 2087 struct sockaddr_in *sin; 2088 2089 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; 2090 sin->sin_port = htons(bind_list->port); 2091 id_priv->bind_list = bind_list; 2092 hlist_add_head(&id_priv->node, &bind_list->owners); 2093} 2094 2095static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv, 2096 unsigned short snum) 2097{ 2098 struct rdma_bind_list *bind_list; 2099 int port, ret; 2100 2101 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL); 2102 if (!bind_list) 2103 return -ENOMEM; 2104 2105 do { 2106 ret = idr_get_new_above(ps, bind_list, snum, &port); 2107 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL)); 2108 2109 if (ret) 2110 goto err1; 2111 2112 if (port != snum) { 2113 ret = -EADDRNOTAVAIL; 2114 goto err2; 2115 } 2116 2117 bind_list->ps = ps; 2118 bind_list->port = (unsigned short) port; 2119 cma_bind_port(bind_list, id_priv); 2120 return 0; 2121err2: 2122 idr_remove(ps, port); 2123err1: 2124 kfree(bind_list); 2125 return ret; 2126} 2127 2128static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv) 2129{ 2130 static unsigned int last_used_port; 2131 int low, high, remaining; 2132 unsigned int rover; 2133 2134 inet_get_local_port_range(&low, &high); 2135 remaining = (high - low) + 1; 2136 rover = net_random() % remaining + low; 2137retry: 2138 if (last_used_port != rover && 2139 !idr_find(ps, (unsigned short) rover)) { 2140 int ret = cma_alloc_port(ps, id_priv, rover); 2141 /* 2142 * Remember previously used port number in order to avoid 2143 * re-using same port immediately after it is closed. 2144 */ 2145 if (!ret) 2146 last_used_port = rover; 2147 if (ret != -EADDRNOTAVAIL) 2148 return ret; 2149 } 2150 if (--remaining) { 2151 rover++; 2152 if ((rover < low) || (rover > high)) 2153 rover = low; 2154 goto retry; 2155 } 2156 return -EADDRNOTAVAIL; 2157} 2158 2159/* 2160 * Check that the requested port is available. This is called when trying to 2161 * bind to a specific port, or when trying to listen on a bound port. In 2162 * the latter case, the provided id_priv may already be on the bind_list, but 2163 * we still need to check that it's okay to start listening. 2164 */ 2165static int cma_check_port(struct rdma_bind_list *bind_list, 2166 struct rdma_id_private *id_priv, uint8_t reuseaddr) 2167{ 2168 struct rdma_id_private *cur_id; 2169 struct sockaddr *addr, *cur_addr; 2170 struct hlist_node *node; 2171 2172 addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr; 2173 if (cma_any_addr(addr) && !reuseaddr) 2174 return -EADDRNOTAVAIL; 2175 2176 hlist_for_each_entry(cur_id, node, &bind_list->owners, node) { 2177 if (id_priv == cur_id) 2178 continue; 2179 2180 if ((cur_id->state == CMA_LISTEN) || 2181 !reuseaddr || !cur_id->reuseaddr) { 2182 cur_addr = (struct sockaddr *) &cur_id->id.route.addr.src_addr; 2183 if (cma_any_addr(cur_addr)) 2184 return -EADDRNOTAVAIL; 2185 2186 if (!cma_addr_cmp(addr, cur_addr)) 2187 return -EADDRINUSE; 2188 } 2189 } 2190 return 0; 2191} 2192 2193static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv) 2194{ 2195 struct rdma_bind_list *bind_list; 2196 unsigned short snum; 2197 int ret; 2198 2199 snum = ntohs(cma_port((struct sockaddr *) &id_priv->id.route.addr.src_addr)); 2200 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE)) 2201 return -EACCES; 2202 2203 bind_list = idr_find(ps, snum); 2204 if (!bind_list) { 2205 ret = cma_alloc_port(ps, id_priv, snum); 2206 } else { 2207 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr); 2208 if (!ret) 2209 cma_bind_port(bind_list, id_priv); 2210 } 2211 return ret; 2212} 2213 2214static int cma_bind_listen(struct rdma_id_private *id_priv) 2215{ 2216 struct rdma_bind_list *bind_list = id_priv->bind_list; 2217 int ret = 0; 2218 2219 mutex_lock(&lock); 2220 if (bind_list->owners.first->next) 2221 ret = cma_check_port(bind_list, id_priv, 0); 2222 mutex_unlock(&lock); 2223 return ret; 2224} 2225 2226static int cma_get_port(struct rdma_id_private *id_priv) 2227{ 2228 struct idr *ps; 2229 int ret; 2230 2231 switch (id_priv->id.ps) { 2232 case RDMA_PS_SDP: 2233 ps = &sdp_ps; 2234 break; 2235 case RDMA_PS_TCP: 2236 ps = &tcp_ps; 2237 break; 2238 case RDMA_PS_UDP: 2239 ps = &udp_ps; 2240 break; 2241 case RDMA_PS_IPOIB: 2242 ps = &ipoib_ps; 2243 break; 2244 default: 2245 return -EPROTONOSUPPORT; 2246 } 2247 2248 mutex_lock(&lock); 2249 if (cma_any_port((struct sockaddr *) &id_priv->id.route.addr.src_addr)) 2250 ret = cma_alloc_any_port(ps, id_priv); 2251 else 2252 ret = cma_use_port(ps, id_priv); 2253 mutex_unlock(&lock); 2254 2255 return ret; 2256} 2257 2258static int cma_check_linklocal(struct rdma_dev_addr *dev_addr, 2259 struct sockaddr *addr) 2260{ 2261#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 2262 struct sockaddr_in6 *sin6; 2263 2264 if (addr->sa_family != AF_INET6) 2265 return 0; 2266 2267 sin6 = (struct sockaddr_in6 *) addr; 2268 if ((ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) && 2269 !sin6->sin6_scope_id) 2270 return -EINVAL; 2271 2272 dev_addr->bound_dev_if = sin6->sin6_scope_id; 2273#endif 2274 return 0; 2275} 2276 2277int rdma_listen(struct rdma_cm_id *id, int backlog) 2278{ 2279 struct rdma_id_private *id_priv; 2280 int ret; 2281 2282 id_priv = container_of(id, struct rdma_id_private, id); 2283 if (id_priv->state == CMA_IDLE) { 2284 ((struct sockaddr *) &id->route.addr.src_addr)->sa_family = AF_INET; 2285 ret = rdma_bind_addr(id, (struct sockaddr *) &id->route.addr.src_addr); 2286 if (ret) 2287 return ret; 2288 } 2289 2290 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_LISTEN)) 2291 return -EINVAL; 2292 2293 if (id_priv->reuseaddr) { 2294 ret = cma_bind_listen(id_priv); 2295 if (ret) 2296 goto err; 2297 } 2298 2299 id_priv->backlog = backlog; 2300 if (id->device) { 2301 switch (rdma_node_get_transport(id->device->node_type)) { 2302 case RDMA_TRANSPORT_IB: 2303 ret = cma_ib_listen(id_priv); 2304 if (ret) 2305 goto err; 2306 break; 2307 case RDMA_TRANSPORT_IWARP: 2308 ret = cma_iw_listen(id_priv, backlog); 2309 if (ret) 2310 goto err; 2311 break; 2312 default: 2313 ret = -ENOSYS; 2314 goto err; 2315 } 2316 } else 2317 cma_listen_on_all(id_priv); 2318 2319 return 0; 2320err: 2321 id_priv->backlog = 0; 2322 cma_comp_exch(id_priv, CMA_LISTEN, CMA_ADDR_BOUND); 2323 return ret; 2324} 2325EXPORT_SYMBOL(rdma_listen); 2326 2327int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr) 2328{ 2329 struct rdma_id_private *id_priv; 2330 int ret; 2331 2332 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6) 2333 return -EAFNOSUPPORT; 2334 2335 id_priv = container_of(id, struct rdma_id_private, id); 2336 if (!cma_comp_exch(id_priv, CMA_IDLE, CMA_ADDR_BOUND)) 2337 return -EINVAL; 2338 2339 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr); 2340 if (ret) 2341 goto err1; 2342 2343 if (!cma_any_addr(addr)) { 2344 ret = rdma_translate_ip(addr, &id->route.addr.dev_addr); 2345 if (ret) 2346 goto err1; 2347 2348 ret = cma_acquire_dev(id_priv); 2349 if (ret) 2350 goto err1; 2351 } 2352 2353 memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr)); 2354 ret = cma_get_port(id_priv); 2355 if (ret) 2356 goto err2; 2357 2358 return 0; 2359err2: 2360 if (id_priv->cma_dev) 2361 cma_release_dev(id_priv); 2362err1: 2363 cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_IDLE); 2364 return ret; 2365} 2366EXPORT_SYMBOL(rdma_bind_addr); 2367 2368static int cma_format_hdr(void *hdr, enum rdma_port_space ps, 2369 struct rdma_route *route) 2370{ 2371 struct cma_hdr *cma_hdr; 2372 struct sdp_hh *sdp_hdr; 2373 2374 if (route->addr.src_addr.ss_family == AF_INET) { 2375 struct sockaddr_in *src4, *dst4; 2376 2377 src4 = (struct sockaddr_in *) &route->addr.src_addr; 2378 dst4 = (struct sockaddr_in *) &route->addr.dst_addr; 2379 2380 switch (ps) { 2381 case RDMA_PS_SDP: 2382 sdp_hdr = hdr; 2383 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION) 2384 return -EINVAL; 2385 sdp_set_ip_ver(sdp_hdr, 4); 2386 sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; 2387 sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; 2388 sdp_hdr->port = src4->sin_port; 2389 break; 2390 default: 2391 cma_hdr = hdr; 2392 cma_hdr->cma_version = CMA_VERSION; 2393 cma_set_ip_ver(cma_hdr, 4); 2394 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; 2395 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; 2396 cma_hdr->port = src4->sin_port; 2397 break; 2398 } 2399 } else { 2400 struct sockaddr_in6 *src6, *dst6; 2401 2402 src6 = (struct sockaddr_in6 *) &route->addr.src_addr; 2403 dst6 = (struct sockaddr_in6 *) &route->addr.dst_addr; 2404 2405 switch (ps) { 2406 case RDMA_PS_SDP: 2407 sdp_hdr = hdr; 2408 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION) 2409 return -EINVAL; 2410 sdp_set_ip_ver(sdp_hdr, 6); 2411 sdp_hdr->src_addr.ip6 = src6->sin6_addr; 2412 sdp_hdr->dst_addr.ip6 = dst6->sin6_addr; 2413 sdp_hdr->port = src6->sin6_port; 2414 break; 2415 default: 2416 cma_hdr = hdr; 2417 cma_hdr->cma_version = CMA_VERSION; 2418 cma_set_ip_ver(cma_hdr, 6); 2419 cma_hdr->src_addr.ip6 = src6->sin6_addr; 2420 cma_hdr->dst_addr.ip6 = dst6->sin6_addr; 2421 cma_hdr->port = src6->sin6_port; 2422 break; 2423 } 2424 } 2425 return 0; 2426} 2427 2428static int cma_sidr_rep_handler(struct ib_cm_id *cm_id, 2429 struct ib_cm_event *ib_event) 2430{ 2431 struct rdma_id_private *id_priv = cm_id->context; 2432 struct rdma_cm_event event; 2433 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd; 2434 int ret = 0; 2435 2436 if (cma_disable_callback(id_priv, CMA_CONNECT)) 2437 return 0; 2438 2439 memset(&event, 0, sizeof event); 2440 switch (ib_event->event) { 2441 case IB_CM_SIDR_REQ_ERROR: 2442 event.event = RDMA_CM_EVENT_UNREACHABLE; 2443 event.status = -ETIMEDOUT; 2444 break; 2445 case IB_CM_SIDR_REP_RECEIVED: 2446 event.param.ud.private_data = ib_event->private_data; 2447 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE; 2448 if (rep->status != IB_SIDR_SUCCESS) { 2449 event.event = RDMA_CM_EVENT_UNREACHABLE; 2450 event.status = ib_event->param.sidr_rep_rcvd.status; 2451 break; 2452 } 2453 ret = cma_set_qkey(id_priv); 2454 if (ret) { 2455 event.event = RDMA_CM_EVENT_ADDR_ERROR; 2456 event.status = -EINVAL; 2457 break; 2458 } 2459 if (id_priv->qkey != rep->qkey) { 2460 event.event = RDMA_CM_EVENT_UNREACHABLE; 2461 event.status = -EINVAL; 2462 break; 2463 } 2464 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num, 2465 id_priv->id.route.path_rec, 2466 &event.param.ud.ah_attr); 2467 event.param.ud.qp_num = rep->qpn; 2468 event.param.ud.qkey = rep->qkey; 2469 event.event = RDMA_CM_EVENT_ESTABLISHED; 2470 event.status = 0; 2471 break; 2472 default: 2473 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n", 2474 ib_event->event); 2475 goto out; 2476 } 2477 2478 ret = id_priv->id.event_handler(&id_priv->id, &event); 2479 if (ret) { 2480 /* Destroy the CM ID by returning a non-zero value. */ 2481 id_priv->cm_id.ib = NULL; 2482 cma_exch(id_priv, CMA_DESTROYING); 2483 mutex_unlock(&id_priv->handler_mutex); 2484 rdma_destroy_id(&id_priv->id); 2485 return ret; 2486 } 2487out: 2488 mutex_unlock(&id_priv->handler_mutex); 2489 return ret; 2490} 2491 2492static int cma_resolve_ib_udp(struct rdma_id_private *id_priv, 2493 struct rdma_conn_param *conn_param) 2494{ 2495 struct ib_cm_sidr_req_param req; 2496 struct rdma_route *route; 2497 int ret; 2498 2499 req.private_data_len = sizeof(struct cma_hdr) + 2500 conn_param->private_data_len; 2501 req.private_data = kzalloc(req.private_data_len, GFP_ATOMIC); 2502 if (!req.private_data) 2503 return -ENOMEM; 2504 2505 if (conn_param->private_data && conn_param->private_data_len) 2506 memcpy((void *) req.private_data + sizeof(struct cma_hdr), 2507 conn_param->private_data, conn_param->private_data_len); 2508 2509 route = &id_priv->id.route; 2510 ret = cma_format_hdr((void *) req.private_data, id_priv->id.ps, route); 2511 if (ret) 2512 goto out; 2513 2514 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, 2515 cma_sidr_rep_handler, id_priv); 2516 if (IS_ERR(id_priv->cm_id.ib)) { 2517 ret = PTR_ERR(id_priv->cm_id.ib); 2518 goto out; 2519 } 2520 2521 req.path = route->path_rec; 2522 req.service_id = cma_get_service_id(id_priv->id.ps, 2523 (struct sockaddr *) &route->addr.dst_addr); 2524 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8); 2525 req.max_cm_retries = CMA_MAX_CM_RETRIES; 2526 2527 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req); 2528 if (ret) { 2529 ib_destroy_cm_id(id_priv->cm_id.ib); 2530 id_priv->cm_id.ib = NULL; 2531 } 2532out: 2533 kfree(req.private_data); 2534 return ret; 2535} 2536 2537static int cma_connect_ib(struct rdma_id_private *id_priv, 2538 struct rdma_conn_param *conn_param) 2539{ 2540 struct ib_cm_req_param req; 2541 struct rdma_route *route; 2542 void *private_data; 2543 int offset, ret; 2544 2545 memset(&req, 0, sizeof req); 2546 offset = cma_user_data_offset(id_priv->id.ps); 2547 req.private_data_len = offset + conn_param->private_data_len; 2548 private_data = kzalloc(req.private_data_len, GFP_ATOMIC); 2549 if (!private_data) 2550 return -ENOMEM; 2551 2552 if (conn_param->private_data && conn_param->private_data_len) 2553 memcpy(private_data + offset, conn_param->private_data, 2554 conn_param->private_data_len); 2555 2556 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_ib_handler, 2557 id_priv); 2558 if (IS_ERR(id_priv->cm_id.ib)) { 2559 ret = PTR_ERR(id_priv->cm_id.ib); 2560 goto out; 2561 } 2562 2563 route = &id_priv->id.route; 2564 ret = cma_format_hdr(private_data, id_priv->id.ps, route); 2565 if (ret) 2566 goto out; 2567 req.private_data = private_data; 2568 2569 req.primary_path = &route->path_rec[0]; 2570 if (route->num_paths == 2) 2571 req.alternate_path = &route->path_rec[1]; 2572 2573 req.service_id = cma_get_service_id(id_priv->id.ps, 2574 (struct sockaddr *) &route->addr.dst_addr); 2575 req.qp_num = id_priv->qp_num; 2576 req.qp_type = IB_QPT_RC; 2577 req.starting_psn = id_priv->seq_num; 2578 req.responder_resources = conn_param->responder_resources; 2579 req.initiator_depth = conn_param->initiator_depth; 2580 req.flow_control = conn_param->flow_control; 2581 req.retry_count = conn_param->retry_count; 2582 req.rnr_retry_count = conn_param->rnr_retry_count; 2583 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; 2584 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; 2585 req.max_cm_retries = CMA_MAX_CM_RETRIES; 2586 req.srq = id_priv->srq ? 1 : 0; 2587 2588 ret = ib_send_cm_req(id_priv->cm_id.ib, &req); 2589out: 2590 if (ret && !IS_ERR(id_priv->cm_id.ib)) { 2591 ib_destroy_cm_id(id_priv->cm_id.ib); 2592 id_priv->cm_id.ib = NULL; 2593 } 2594 2595 kfree(private_data); 2596 return ret; 2597} 2598 2599static int cma_connect_iw(struct rdma_id_private *id_priv, 2600 struct rdma_conn_param *conn_param) 2601{ 2602 struct iw_cm_id *cm_id; 2603 struct sockaddr_in* sin; 2604 int ret; 2605 struct iw_cm_conn_param iw_param; 2606 2607 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv); 2608 if (IS_ERR(cm_id)) { 2609 ret = PTR_ERR(cm_id); 2610 goto out; 2611 } 2612 2613 id_priv->cm_id.iw = cm_id; 2614 2615 sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr; 2616 cm_id->local_addr = *sin; 2617 2618 sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr; 2619 cm_id->remote_addr = *sin; 2620 2621 ret = cma_modify_qp_rtr(id_priv, conn_param); 2622 if (ret) 2623 goto out; 2624 2625 iw_param.ord = conn_param->initiator_depth; 2626 iw_param.ird = conn_param->responder_resources; 2627 iw_param.private_data = conn_param->private_data; 2628 iw_param.private_data_len = conn_param->private_data_len; 2629 if (id_priv->id.qp) 2630 iw_param.qpn = id_priv->qp_num; 2631 else 2632 iw_param.qpn = conn_param->qp_num; 2633 ret = iw_cm_connect(cm_id, &iw_param); 2634out: 2635 if (ret && !IS_ERR(cm_id)) { 2636 iw_destroy_cm_id(cm_id); 2637 id_priv->cm_id.iw = NULL; 2638 } 2639 return ret; 2640} 2641 2642int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) 2643{ 2644 struct rdma_id_private *id_priv; 2645 int ret; 2646 2647 id_priv = container_of(id, struct rdma_id_private, id); 2648 if (!cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_CONNECT)) 2649 return -EINVAL; 2650 2651 if (!id->qp) { 2652 id_priv->qp_num = conn_param->qp_num; 2653 id_priv->srq = conn_param->srq; 2654 } 2655 2656 switch (rdma_node_get_transport(id->device->node_type)) { 2657 case RDMA_TRANSPORT_IB: 2658 if (cma_is_ud_ps(id->ps)) 2659 ret = cma_resolve_ib_udp(id_priv, conn_param); 2660 else 2661 ret = cma_connect_ib(id_priv, conn_param); 2662 break; 2663 case RDMA_TRANSPORT_IWARP: 2664 ret = cma_connect_iw(id_priv, conn_param); 2665 break; 2666 default: 2667 ret = -ENOSYS; 2668 break; 2669 } 2670 if (ret) 2671 goto err; 2672 2673 return 0; 2674err: 2675 cma_comp_exch(id_priv, CMA_CONNECT, CMA_ROUTE_RESOLVED); 2676 return ret; 2677} 2678EXPORT_SYMBOL(rdma_connect); 2679 2680static int cma_accept_ib(struct rdma_id_private *id_priv, 2681 struct rdma_conn_param *conn_param) 2682{ 2683 struct ib_cm_rep_param rep; 2684 int ret; 2685 2686 ret = cma_modify_qp_rtr(id_priv, conn_param); 2687 if (ret) 2688 goto out; 2689 2690 ret = cma_modify_qp_rts(id_priv, conn_param); 2691 if (ret) 2692 goto out; 2693 2694 memset(&rep, 0, sizeof rep); 2695 rep.qp_num = id_priv->qp_num; 2696 rep.starting_psn = id_priv->seq_num; 2697 rep.private_data = conn_param->private_data; 2698 rep.private_data_len = conn_param->private_data_len; 2699 rep.responder_resources = conn_param->responder_resources; 2700 rep.initiator_depth = conn_param->initiator_depth; 2701 rep.failover_accepted = 0; 2702 rep.flow_control = conn_param->flow_control; 2703 rep.rnr_retry_count = conn_param->rnr_retry_count; 2704 rep.srq = id_priv->srq ? 1 : 0; 2705 2706 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep); 2707out: 2708 return ret; 2709} 2710 2711static int cma_accept_iw(struct rdma_id_private *id_priv, 2712 struct rdma_conn_param *conn_param) 2713{ 2714 struct iw_cm_conn_param iw_param; 2715 int ret; 2716 2717 ret = cma_modify_qp_rtr(id_priv, conn_param); 2718 if (ret) 2719 return ret; 2720 2721 iw_param.ord = conn_param->initiator_depth; 2722 iw_param.ird = conn_param->responder_resources; 2723 iw_param.private_data = conn_param->private_data; 2724 iw_param.private_data_len = conn_param->private_data_len; 2725 if (id_priv->id.qp) { 2726 iw_param.qpn = id_priv->qp_num; 2727 } else 2728 iw_param.qpn = conn_param->qp_num; 2729 2730 return iw_cm_accept(id_priv->cm_id.iw, &iw_param); 2731} 2732 2733static int cma_send_sidr_rep(struct rdma_id_private *id_priv, 2734 enum ib_cm_sidr_status status, 2735 const void *private_data, int private_data_len) 2736{ 2737 struct ib_cm_sidr_rep_param rep; 2738 int ret; 2739 2740 memset(&rep, 0, sizeof rep); 2741 rep.status = status; 2742 if (status == IB_SIDR_SUCCESS) { 2743 ret = cma_set_qkey(id_priv); 2744 if (ret) 2745 return ret; 2746 rep.qp_num = id_priv->qp_num; 2747 rep.qkey = id_priv->qkey; 2748 } 2749 rep.private_data = private_data; 2750 rep.private_data_len = private_data_len; 2751 2752 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep); 2753} 2754 2755int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) 2756{ 2757 struct rdma_id_private *id_priv; 2758 int ret; 2759 2760 id_priv = container_of(id, struct rdma_id_private, id); 2761 if (!cma_comp(id_priv, CMA_CONNECT)) 2762 return -EINVAL; 2763 2764 if (!id->qp && conn_param) { 2765 id_priv->qp_num = conn_param->qp_num; 2766 id_priv->srq = conn_param->srq; 2767 } 2768 2769 switch (rdma_node_get_transport(id->device->node_type)) { 2770 case RDMA_TRANSPORT_IB: 2771 if (cma_is_ud_ps(id->ps)) 2772 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS, 2773 conn_param->private_data, 2774 conn_param->private_data_len); 2775 else if (conn_param) 2776 ret = cma_accept_ib(id_priv, conn_param); 2777 else 2778 ret = cma_rep_recv(id_priv); 2779 break; 2780 case RDMA_TRANSPORT_IWARP: 2781 ret = cma_accept_iw(id_priv, conn_param); 2782 break; 2783 default: 2784 ret = -ENOSYS; 2785 break; 2786 } 2787 2788 if (ret) 2789 goto reject; 2790 2791 return 0; 2792reject: 2793 cma_modify_qp_err(id_priv); 2794 rdma_reject(id, NULL, 0); 2795 return ret; 2796} 2797EXPORT_SYMBOL(rdma_accept); 2798 2799int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event) 2800{ 2801 struct rdma_id_private *id_priv; 2802 int ret; 2803 2804 id_priv = container_of(id, struct rdma_id_private, id); 2805 if (!cma_has_cm_dev(id_priv)) 2806 return -EINVAL; 2807 2808 switch (id->device->node_type) { 2809 case RDMA_NODE_IB_CA: 2810 ret = ib_cm_notify(id_priv->cm_id.ib, event); 2811 break; 2812 default: 2813 ret = 0; 2814 break; 2815 } 2816 return ret; 2817} 2818EXPORT_SYMBOL(rdma_notify); 2819 2820int rdma_reject(struct rdma_cm_id *id, const void *private_data, 2821 u8 private_data_len) 2822{ 2823 struct rdma_id_private *id_priv; 2824 int ret; 2825 2826 id_priv = container_of(id, struct rdma_id_private, id); 2827 if (!cma_has_cm_dev(id_priv)) 2828 return -EINVAL; 2829 2830 switch (rdma_node_get_transport(id->device->node_type)) { 2831 case RDMA_TRANSPORT_IB: 2832 if (cma_is_ud_ps(id->ps)) 2833 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 2834 private_data, private_data_len); 2835 else 2836 ret = ib_send_cm_rej(id_priv->cm_id.ib, 2837 IB_CM_REJ_CONSUMER_DEFINED, NULL, 2838 0, private_data, private_data_len); 2839 break; 2840 case RDMA_TRANSPORT_IWARP: 2841 ret = iw_cm_reject(id_priv->cm_id.iw, 2842 private_data, private_data_len); 2843 break; 2844 default: 2845 ret = -ENOSYS; 2846 break; 2847 } 2848 return ret; 2849} 2850EXPORT_SYMBOL(rdma_reject); 2851 2852int rdma_disconnect(struct rdma_cm_id *id) 2853{ 2854 struct rdma_id_private *id_priv; 2855 int ret; 2856 2857 id_priv = container_of(id, struct rdma_id_private, id); 2858 if (!cma_has_cm_dev(id_priv)) 2859 return -EINVAL; 2860 2861 switch (rdma_node_get_transport(id->device->node_type)) { 2862 case RDMA_TRANSPORT_IB: 2863 ret = cma_modify_qp_err(id_priv); 2864 if (ret) 2865 goto out; 2866 /* Initiate or respond to a disconnect. */ 2867 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0)) 2868 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0); 2869 break; 2870 case RDMA_TRANSPORT_IWARP: 2871 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0); 2872 break; 2873 default: 2874 ret = -EINVAL; 2875 break; 2876 } 2877out: 2878 return ret; 2879} 2880EXPORT_SYMBOL(rdma_disconnect); 2881 2882static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast) 2883{ 2884 struct rdma_id_private *id_priv; 2885 struct cma_multicast *mc = multicast->context; 2886 struct rdma_cm_event event; 2887 int ret; 2888 2889 id_priv = mc->id_priv; 2890 if (cma_disable_callback(id_priv, CMA_ADDR_BOUND) && 2891 cma_disable_callback(id_priv, CMA_ADDR_RESOLVED)) 2892 return 0; 2893 2894 mutex_lock(&id_priv->qp_mutex); 2895 if (!status && id_priv->id.qp) 2896 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid, 2897 multicast->rec.mlid); 2898 mutex_unlock(&id_priv->qp_mutex); 2899 2900 memset(&event, 0, sizeof event); 2901 event.status = status; 2902 event.param.ud.private_data = mc->context; 2903 if (!status) { 2904 event.event = RDMA_CM_EVENT_MULTICAST_JOIN; 2905 ib_init_ah_from_mcmember(id_priv->id.device, 2906 id_priv->id.port_num, &multicast->rec, 2907 &event.param.ud.ah_attr); 2908 event.param.ud.qp_num = 0xFFFFFF; 2909 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey); 2910 } else 2911 event.event = RDMA_CM_EVENT_MULTICAST_ERROR; 2912 2913 ret = id_priv->id.event_handler(&id_priv->id, &event); 2914 if (ret) { 2915 cma_exch(id_priv, CMA_DESTROYING); 2916 mutex_unlock(&id_priv->handler_mutex); 2917 rdma_destroy_id(&id_priv->id); 2918 return 0; 2919 } 2920 2921 mutex_unlock(&id_priv->handler_mutex); 2922 return 0; 2923} 2924 2925static void cma_set_mgid(struct rdma_id_private *id_priv, 2926 struct sockaddr *addr, union ib_gid *mgid) 2927{ 2928 unsigned char mc_map[MAX_ADDR_LEN]; 2929 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 2930 struct sockaddr_in *sin = (struct sockaddr_in *) addr; 2931 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr; 2932 2933 if (cma_any_addr(addr)) { 2934 memset(mgid, 0, sizeof *mgid); 2935 } else if ((addr->sa_family == AF_INET6) && 2936 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) == 2937 0xFF10A01B)) { 2938 /* IPv6 address is an SA assigned MGID. */ 2939 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid); 2940 } else if ((addr->sa_family == AF_INET6)) { 2941 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map); 2942 if (id_priv->id.ps == RDMA_PS_UDP) 2943 mc_map[7] = 0x01; /* Use RDMA CM signature */ 2944 *mgid = *(union ib_gid *) (mc_map + 4); 2945 } else { 2946 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map); 2947 if (id_priv->id.ps == RDMA_PS_UDP) 2948 mc_map[7] = 0x01; /* Use RDMA CM signature */ 2949 *mgid = *(union ib_gid *) (mc_map + 4); 2950 } 2951} 2952 2953static int cma_join_ib_multicast(struct rdma_id_private *id_priv, 2954 struct cma_multicast *mc) 2955{ 2956 struct ib_sa_mcmember_rec rec; 2957 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 2958 ib_sa_comp_mask comp_mask; 2959 int ret; 2960 2961 ib_addr_get_mgid(dev_addr, &rec.mgid); 2962 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num, 2963 &rec.mgid, &rec); 2964 if (ret) 2965 return ret; 2966 2967 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid); 2968 if (id_priv->id.ps == RDMA_PS_UDP) 2969 rec.qkey = cpu_to_be32(RDMA_UDP_QKEY); 2970 rdma_addr_get_sgid(dev_addr, &rec.port_gid); 2971 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); 2972 rec.join_state = 1; 2973 2974 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID | 2975 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE | 2976 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL | 2977 IB_SA_MCMEMBER_REC_FLOW_LABEL | 2978 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS; 2979 2980 if (id_priv->id.ps == RDMA_PS_IPOIB) 2981 comp_mask |= IB_SA_MCMEMBER_REC_RATE | 2982 IB_SA_MCMEMBER_REC_RATE_SELECTOR; 2983 2984 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device, 2985 id_priv->id.port_num, &rec, 2986 comp_mask, GFP_KERNEL, 2987 cma_ib_mc_handler, mc); 2988 if (IS_ERR(mc->multicast.ib)) 2989 return PTR_ERR(mc->multicast.ib); 2990 2991 return 0; 2992} 2993 2994static void iboe_mcast_work_handler(struct work_struct *work) 2995{ 2996 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work); 2997 struct cma_multicast *mc = mw->mc; 2998 struct ib_sa_multicast *m = mc->multicast.ib; 2999 3000 mc->multicast.ib->context = mc; 3001 cma_ib_mc_handler(0, m); 3002 kref_put(&mc->mcref, release_mc); 3003 kfree(mw); 3004} 3005 3006static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid) 3007{ 3008 struct sockaddr_in *sin = (struct sockaddr_in *)addr; 3009 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr; 3010 3011 if (cma_any_addr(addr)) { 3012 memset(mgid, 0, sizeof *mgid); 3013 } else if (addr->sa_family == AF_INET6) { 3014 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid); 3015 } else { 3016 mgid->raw[0] = 0xff; 3017 mgid->raw[1] = 0x0e; 3018 mgid->raw[2] = 0; 3019 mgid->raw[3] = 0; 3020 mgid->raw[4] = 0; 3021 mgid->raw[5] = 0; 3022 mgid->raw[6] = 0; 3023 mgid->raw[7] = 0; 3024 mgid->raw[8] = 0; 3025 mgid->raw[9] = 0; 3026 mgid->raw[10] = 0xff; 3027 mgid->raw[11] = 0xff; 3028 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr; 3029 } 3030} 3031 3032static int cma_iboe_join_multicast(struct rdma_id_private *id_priv, 3033 struct cma_multicast *mc) 3034{ 3035 struct iboe_mcast_work *work; 3036 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 3037 int err; 3038 struct sockaddr *addr = (struct sockaddr *)&mc->addr; 3039 struct net_device *ndev = NULL; 3040 3041 if (cma_zero_addr((struct sockaddr *)&mc->addr)) 3042 return -EINVAL; 3043 3044 work = kzalloc(sizeof *work, GFP_KERNEL); 3045 if (!work) 3046 return -ENOMEM; 3047 3048 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL); 3049 if (!mc->multicast.ib) { 3050 err = -ENOMEM; 3051 goto out1; 3052 } 3053 3054 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid); 3055 3056 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff); 3057 if (id_priv->id.ps == RDMA_PS_UDP) 3058 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY); 3059 3060 if (dev_addr->bound_dev_if) 3061 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if); 3062 if (!ndev) { 3063 err = -ENODEV; 3064 goto out2; 3065 } 3066 mc->multicast.ib->rec.rate = iboe_get_rate(ndev); 3067 mc->multicast.ib->rec.hop_limit = 1; 3068 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu); 3069 dev_put(ndev); 3070 if (!mc->multicast.ib->rec.mtu) { 3071 err = -EINVAL; 3072 goto out2; 3073 } 3074 iboe_addr_get_sgid(dev_addr, &mc->multicast.ib->rec.port_gid); 3075 work->id = id_priv; 3076 work->mc = mc; 3077 INIT_WORK(&work->work, iboe_mcast_work_handler); 3078 kref_get(&mc->mcref); 3079 queue_work(cma_wq, &work->work); 3080 3081 return 0; 3082 3083out2: 3084 kfree(mc->multicast.ib); 3085out1: 3086 kfree(work); 3087 return err; 3088} 3089 3090int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr, 3091 void *context) 3092{ 3093 struct rdma_id_private *id_priv; 3094 struct cma_multicast *mc; 3095 int ret; 3096 3097 id_priv = container_of(id, struct rdma_id_private, id); 3098 if (!cma_comp(id_priv, CMA_ADDR_BOUND) && 3099 !cma_comp(id_priv, CMA_ADDR_RESOLVED)) 3100 return -EINVAL; 3101 3102 mc = kmalloc(sizeof *mc, GFP_KERNEL); 3103 if (!mc) 3104 return -ENOMEM; 3105 3106 memcpy(&mc->addr, addr, ip_addr_size(addr)); 3107 mc->context = context; 3108 mc->id_priv = id_priv; 3109 3110 spin_lock(&id_priv->lock); 3111 list_add(&mc->list, &id_priv->mc_list); 3112 spin_unlock(&id_priv->lock); 3113 3114 switch (rdma_node_get_transport(id->device->node_type)) { 3115 case RDMA_TRANSPORT_IB: 3116 switch (rdma_port_get_link_layer(id->device, id->port_num)) { 3117 case IB_LINK_LAYER_INFINIBAND: 3118 ret = cma_join_ib_multicast(id_priv, mc); 3119 break; 3120 case IB_LINK_LAYER_ETHERNET: 3121 kref_init(&mc->mcref); 3122 ret = cma_iboe_join_multicast(id_priv, mc); 3123 break; 3124 default: 3125 ret = -EINVAL; 3126 } 3127 break; 3128 default: 3129 ret = -ENOSYS; 3130 break; 3131 } 3132 3133 if (ret) { 3134 spin_lock_irq(&id_priv->lock); 3135 list_del(&mc->list); 3136 spin_unlock_irq(&id_priv->lock); 3137 kfree(mc); 3138 } 3139 return ret; 3140} 3141EXPORT_SYMBOL(rdma_join_multicast); 3142 3143void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr) 3144{ 3145 struct rdma_id_private *id_priv; 3146 struct cma_multicast *mc; 3147 3148 id_priv = container_of(id, struct rdma_id_private, id); 3149 spin_lock_irq(&id_priv->lock); 3150 list_for_each_entry(mc, &id_priv->mc_list, list) { 3151 if (!memcmp(&mc->addr, addr, ip_addr_size(addr))) { 3152 list_del(&mc->list); 3153 spin_unlock_irq(&id_priv->lock); 3154 3155 if (id->qp) 3156 ib_detach_mcast(id->qp, 3157 &mc->multicast.ib->rec.mgid, 3158 mc->multicast.ib->rec.mlid); 3159 if (rdma_node_get_transport(id_priv->cma_dev->device->node_type) == RDMA_TRANSPORT_IB) { 3160 switch (rdma_port_get_link_layer(id->device, id->port_num)) { 3161 case IB_LINK_LAYER_INFINIBAND: 3162 ib_sa_free_multicast(mc->multicast.ib); 3163 kfree(mc); 3164 break; 3165 case IB_LINK_LAYER_ETHERNET: 3166 kref_put(&mc->mcref, release_mc); 3167 break; 3168 default: 3169 break; 3170 } 3171 } 3172 return; 3173 } 3174 } 3175 spin_unlock_irq(&id_priv->lock); 3176} 3177EXPORT_SYMBOL(rdma_leave_multicast); 3178 3179static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv) 3180{ 3181 struct rdma_dev_addr *dev_addr; 3182 struct cma_ndev_work *work; 3183 3184 dev_addr = &id_priv->id.route.addr.dev_addr; 3185 3186 if ((dev_addr->bound_dev_if == ndev->ifindex) && 3187 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) { 3188 printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n", 3189 ndev->name, &id_priv->id); 3190 work = kzalloc(sizeof *work, GFP_KERNEL); 3191 if (!work) 3192 return -ENOMEM; 3193 3194 INIT_WORK(&work->work, cma_ndev_work_handler); 3195 work->id = id_priv; 3196 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE; 3197 atomic_inc(&id_priv->refcount); 3198 queue_work(cma_wq, &work->work); 3199 } 3200 3201 return 0; 3202} 3203 3204static int cma_netdev_callback(struct notifier_block *self, unsigned long event, 3205 void *ctx) 3206{ 3207 struct net_device *ndev = (struct net_device *)ctx; 3208 struct cma_device *cma_dev; 3209 struct rdma_id_private *id_priv; 3210 int ret = NOTIFY_DONE; 3211 3212 if (dev_net(ndev) != &init_net) 3213 return NOTIFY_DONE; 3214 3215 if (event != NETDEV_BONDING_FAILOVER) 3216 return NOTIFY_DONE; 3217 3218 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING)) 3219 return NOTIFY_DONE; 3220 3221 mutex_lock(&lock); 3222 list_for_each_entry(cma_dev, &dev_list, list) 3223 list_for_each_entry(id_priv, &cma_dev->id_list, list) { 3224 ret = cma_netdev_change(ndev, id_priv); 3225 if (ret) 3226 goto out; 3227 } 3228 3229out: 3230 mutex_unlock(&lock); 3231 return ret; 3232} 3233 3234static struct notifier_block cma_nb = { 3235 .notifier_call = cma_netdev_callback 3236}; 3237 3238static void cma_add_one(struct ib_device *device) 3239{ 3240 struct cma_device *cma_dev; 3241 struct rdma_id_private *id_priv; 3242 3243 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL); 3244 if (!cma_dev) 3245 return; 3246 3247 cma_dev->device = device; 3248 3249 init_completion(&cma_dev->comp); 3250 atomic_set(&cma_dev->refcount, 1); 3251 INIT_LIST_HEAD(&cma_dev->id_list); 3252 ib_set_client_data(device, &cma_client, cma_dev); 3253 3254 mutex_lock(&lock); 3255 list_add_tail(&cma_dev->list, &dev_list); 3256 list_for_each_entry(id_priv, &listen_any_list, list) 3257 cma_listen_on_dev(id_priv, cma_dev); 3258 mutex_unlock(&lock); 3259} 3260 3261static int cma_remove_id_dev(struct rdma_id_private *id_priv) 3262{ 3263 struct rdma_cm_event event; 3264 enum cma_state state; 3265 int ret = 0; 3266 3267 /* Record that we want to remove the device */ 3268 state = cma_exch(id_priv, CMA_DEVICE_REMOVAL); 3269 if (state == CMA_DESTROYING) 3270 return 0; 3271 3272 cma_cancel_operation(id_priv, state); 3273 mutex_lock(&id_priv->handler_mutex); 3274 3275 /* Check for destruction from another callback. */ 3276 if (!cma_comp(id_priv, CMA_DEVICE_REMOVAL)) 3277 goto out; 3278 3279 memset(&event, 0, sizeof event); 3280 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL; 3281 ret = id_priv->id.event_handler(&id_priv->id, &event); 3282out: 3283 mutex_unlock(&id_priv->handler_mutex); 3284 return ret; 3285} 3286 3287static void cma_process_remove(struct cma_device *cma_dev) 3288{ 3289 struct rdma_id_private *id_priv; 3290 int ret; 3291 3292 mutex_lock(&lock); 3293 while (!list_empty(&cma_dev->id_list)) { 3294 id_priv = list_entry(cma_dev->id_list.next, 3295 struct rdma_id_private, list); 3296 3297 list_del(&id_priv->listen_list); 3298 list_del_init(&id_priv->list); 3299 atomic_inc(&id_priv->refcount); 3300 mutex_unlock(&lock); 3301 3302 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv); 3303 cma_deref_id(id_priv); 3304 if (ret) 3305 rdma_destroy_id(&id_priv->id); 3306 3307 mutex_lock(&lock); 3308 } 3309 mutex_unlock(&lock); 3310 3311 cma_deref_dev(cma_dev); 3312 wait_for_completion(&cma_dev->comp); 3313} 3314 3315static void cma_remove_one(struct ib_device *device) 3316{ 3317 struct cma_device *cma_dev; 3318 3319 cma_dev = ib_get_client_data(device, &cma_client); 3320 if (!cma_dev) 3321 return; 3322 3323 mutex_lock(&lock); 3324 list_del(&cma_dev->list); 3325 mutex_unlock(&lock); 3326 3327 cma_process_remove(cma_dev); 3328 kfree(cma_dev); 3329} 3330 3331static int __init cma_init(void) 3332{ 3333 int ret; 3334 3335 cma_wq = create_singlethread_workqueue("rdma_cm"); 3336 if (!cma_wq) 3337 return -ENOMEM; 3338 3339 ib_sa_register_client(&sa_client); 3340 rdma_addr_register_client(&addr_client); 3341 register_netdevice_notifier(&cma_nb); 3342 3343 ret = ib_register_client(&cma_client); 3344 if (ret) 3345 goto err; 3346 return 0; 3347 3348err: 3349 unregister_netdevice_notifier(&cma_nb); 3350 rdma_addr_unregister_client(&addr_client); 3351 ib_sa_unregister_client(&sa_client); 3352 destroy_workqueue(cma_wq); 3353 return ret; 3354} 3355 3356static void __exit cma_cleanup(void) 3357{ 3358 ib_unregister_client(&cma_client); 3359 unregister_netdevice_notifier(&cma_nb); 3360 rdma_addr_unregister_client(&addr_client); 3361 ib_sa_unregister_client(&sa_client); 3362 destroy_workqueue(cma_wq); 3363 idr_destroy(&sdp_ps); 3364 idr_destroy(&tcp_ps); 3365 idr_destroy(&udp_ps); 3366 idr_destroy(&ipoib_ps); 3367} 3368 3369module_init(cma_init); 3370module_exit(cma_cleanup); 3371