1/* 2 * Copyright (c) 2005 Voltaire Inc. All rights reserved. 3 * Copyright (c) 2002-2005, Network Appliance, Inc. All rights reserved. 4 * Copyright (c) 1999-2005, Mellanox Technologies, Inc. All rights reserved. 5 * Copyright (c) 2005-2006 Intel Corporation. All rights reserved. 6 * 7 * This software is available to you under a choice of one of two 8 * licenses. You may choose to be licensed under the terms of the GNU 9 * General Public License (GPL) Version 2, available from the file 10 * COPYING in the main directory of this source tree, or the 11 * OpenIB.org BSD license below: 12 * 13 * Redistribution and use in source and binary forms, with or 14 * without modification, are permitted provided that the following 15 * conditions are met: 16 * 17 * - Redistributions of source code must retain the above 18 * copyright notice, this list of conditions and the following 19 * disclaimer. 20 * 21 * - Redistributions in binary form must reproduce the above 22 * copyright notice, this list of conditions and the following 23 * disclaimer in the documentation and/or other materials 24 * provided with the distribution. 25 * 26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 33 * SOFTWARE. 34 */ 35 36#include <linux/completion.h> 37#include <linux/in.h> 38#include <linux/in6.h> 39#include <linux/mutex.h> 40#include <linux/random.h> 41#include <linux/idr.h> 42#include <linux/inetdevice.h> 43#include <linux/slab.h> 44#include <linux/module.h> 45 46#include <net/tcp.h> 47#include <net/ipv6.h> 48 49#include <rdma/rdma_cm.h> 50#include <rdma/rdma_cm_ib.h> 51#include <rdma/rdma_netlink.h> 52#include <rdma/ib_cache.h> 53#include <rdma/ib_cm.h> 54#include <rdma/ib_sa.h> 55#include <rdma/iw_cm.h> 56 57MODULE_AUTHOR("Sean Hefty"); 58MODULE_DESCRIPTION("Generic RDMA CM Agent"); 59MODULE_LICENSE("Dual BSD/GPL"); 60 61#define CMA_CM_RESPONSE_TIMEOUT 20 62#define CMA_MAX_CM_RETRIES 15 63#define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24) 64#define CMA_IBOE_PACKET_LIFETIME 18 65 66static void cma_add_one(struct ib_device *device); 67static void cma_remove_one(struct ib_device *device); 68 69static struct ib_client cma_client = { 70 .name = "cma", 71 .add = cma_add_one, 72 .remove = cma_remove_one 73}; 74 75static struct ib_sa_client sa_client; 76static struct rdma_addr_client addr_client; 77static LIST_HEAD(dev_list); 78static LIST_HEAD(listen_any_list); 79static DEFINE_MUTEX(lock); 80static struct workqueue_struct *cma_wq; 81static DEFINE_IDR(sdp_ps); 82static DEFINE_IDR(tcp_ps); 83static DEFINE_IDR(udp_ps); 84static DEFINE_IDR(ipoib_ps); 85static DEFINE_IDR(ib_ps); 86 87struct cma_device { 88 struct list_head list; 89 struct ib_device *device; 90 struct completion comp; 91 atomic_t refcount; 92 struct list_head id_list; 93}; 94 95struct rdma_bind_list { 96 struct idr *ps; 97 struct hlist_head owners; 98 unsigned short port; 99}; 100 101/* 102 * Device removal can occur at anytime, so we need extra handling to 103 * serialize notifying the user of device removal with other callbacks. 104 * We do this by disabling removal notification while a callback is in process, 105 * and reporting it after the callback completes. 106 */ 107struct rdma_id_private { 108 struct rdma_cm_id id; 109 110 struct rdma_bind_list *bind_list; 111 struct hlist_node node; 112 struct list_head list; /* listen_any_list or cma_device.list */ 113 struct list_head listen_list; /* per device listens */ 114 struct cma_device *cma_dev; 115 struct list_head mc_list; 116 117 int internal_id; 118 enum rdma_cm_state state; 119 spinlock_t lock; 120 struct mutex qp_mutex; 121 122 struct completion comp; 123 atomic_t refcount; 124 struct mutex handler_mutex; 125 126 int backlog; 127 int timeout_ms; 128 struct ib_sa_query *query; 129 int query_id; 130 union { 131 struct ib_cm_id *ib; 132 struct iw_cm_id *iw; 133 } cm_id; 134 135 u32 seq_num; 136 u32 qkey; 137 u32 qp_num; 138 pid_t owner; 139 u8 srq; 140 u8 tos; 141 u8 reuseaddr; 142}; 143 144struct cma_multicast { 145 struct rdma_id_private *id_priv; 146 union { 147 struct ib_sa_multicast *ib; 148 } multicast; 149 struct list_head list; 150 void *context; 151 struct sockaddr_storage addr; 152 struct kref mcref; 153}; 154 155struct cma_work { 156 struct work_struct work; 157 struct rdma_id_private *id; 158 enum rdma_cm_state old_state; 159 enum rdma_cm_state new_state; 160 struct rdma_cm_event event; 161}; 162 163struct cma_ndev_work { 164 struct work_struct work; 165 struct rdma_id_private *id; 166 struct rdma_cm_event event; 167}; 168 169struct iboe_mcast_work { 170 struct work_struct work; 171 struct rdma_id_private *id; 172 struct cma_multicast *mc; 173}; 174 175union cma_ip_addr { 176 struct in6_addr ip6; 177 struct { 178 __be32 pad[3]; 179 __be32 addr; 180 } ip4; 181}; 182 183struct cma_hdr { 184 u8 cma_version; 185 u8 ip_version; /* IP version: 7:4 */ 186 __be16 port; 187 union cma_ip_addr src_addr; 188 union cma_ip_addr dst_addr; 189}; 190 191struct sdp_hh { 192 u8 bsdh[16]; 193 u8 sdp_version; /* Major version: 7:4 */ 194 u8 ip_version; /* IP version: 7:4 */ 195 u8 sdp_specific1[10]; 196 __be16 port; 197 __be16 sdp_specific2; 198 union cma_ip_addr src_addr; 199 union cma_ip_addr dst_addr; 200}; 201 202struct sdp_hah { 203 u8 bsdh[16]; 204 u8 sdp_version; 205}; 206 207#define CMA_VERSION 0x00 208#define SDP_MAJ_VERSION 0x2 209 210static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp) 211{ 212 unsigned long flags; 213 int ret; 214 215 spin_lock_irqsave(&id_priv->lock, flags); 216 ret = (id_priv->state == comp); 217 spin_unlock_irqrestore(&id_priv->lock, flags); 218 return ret; 219} 220 221static int cma_comp_exch(struct rdma_id_private *id_priv, 222 enum rdma_cm_state comp, enum rdma_cm_state exch) 223{ 224 unsigned long flags; 225 int ret; 226 227 spin_lock_irqsave(&id_priv->lock, flags); 228 if ((ret = (id_priv->state == comp))) 229 id_priv->state = exch; 230 spin_unlock_irqrestore(&id_priv->lock, flags); 231 return ret; 232} 233 234static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv, 235 enum rdma_cm_state exch) 236{ 237 unsigned long flags; 238 enum rdma_cm_state old; 239 240 spin_lock_irqsave(&id_priv->lock, flags); 241 old = id_priv->state; 242 id_priv->state = exch; 243 spin_unlock_irqrestore(&id_priv->lock, flags); 244 return old; 245} 246 247static inline u8 cma_get_ip_ver(struct cma_hdr *hdr) 248{ 249 return hdr->ip_version >> 4; 250} 251 252static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver) 253{ 254 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF); 255} 256 257static inline u8 sdp_get_majv(u8 sdp_version) 258{ 259 return sdp_version >> 4; 260} 261 262static inline u8 sdp_get_ip_ver(struct sdp_hh *hh) 263{ 264 return hh->ip_version >> 4; 265} 266 267static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver) 268{ 269 hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF); 270} 271 272static void cma_attach_to_dev(struct rdma_id_private *id_priv, 273 struct cma_device *cma_dev) 274{ 275 atomic_inc(&cma_dev->refcount); 276 id_priv->cma_dev = cma_dev; 277 id_priv->id.device = cma_dev->device; 278 id_priv->id.route.addr.dev_addr.transport = 279 rdma_node_get_transport(cma_dev->device->node_type); 280 list_add_tail(&id_priv->list, &cma_dev->id_list); 281} 282 283static inline void cma_deref_dev(struct cma_device *cma_dev) 284{ 285 if (atomic_dec_and_test(&cma_dev->refcount)) 286 complete(&cma_dev->comp); 287} 288 289static inline void release_mc(struct kref *kref) 290{ 291 struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref); 292 293 kfree(mc->multicast.ib); 294 kfree(mc); 295} 296 297static void cma_release_dev(struct rdma_id_private *id_priv) 298{ 299 mutex_lock(&lock); 300 list_del(&id_priv->list); 301 cma_deref_dev(id_priv->cma_dev); 302 id_priv->cma_dev = NULL; 303 mutex_unlock(&lock); 304} 305 306static int cma_set_qkey(struct rdma_id_private *id_priv) 307{ 308 struct ib_sa_mcmember_rec rec; 309 int ret = 0; 310 311 if (id_priv->qkey) 312 return 0; 313 314 switch (id_priv->id.ps) { 315 case RDMA_PS_UDP: 316 id_priv->qkey = RDMA_UDP_QKEY; 317 break; 318 case RDMA_PS_IPOIB: 319 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid); 320 ret = ib_sa_get_mcmember_rec(id_priv->id.device, 321 id_priv->id.port_num, &rec.mgid, 322 &rec); 323 if (!ret) 324 id_priv->qkey = be32_to_cpu(rec.qkey); 325 break; 326 default: 327 break; 328 } 329 return ret; 330} 331 332static int find_gid_port(struct ib_device *device, union ib_gid *gid, u8 port_num) 333{ 334 int i; 335 int err; 336 struct ib_port_attr props; 337 union ib_gid tmp; 338 339 err = ib_query_port(device, port_num, &props); 340 if (err) 341 return 1; 342 343 for (i = 0; i < props.gid_tbl_len; ++i) { 344 err = ib_query_gid(device, port_num, i, &tmp); 345 if (err) 346 return 1; 347 if (!memcmp(&tmp, gid, sizeof tmp)) 348 return 0; 349 } 350 351 return -EAGAIN; 352} 353 354static int cma_acquire_dev(struct rdma_id_private *id_priv) 355{ 356 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 357 struct cma_device *cma_dev; 358 union ib_gid gid, iboe_gid; 359 int ret = -ENODEV; 360 u8 port; 361 enum rdma_link_layer dev_ll = dev_addr->dev_type == ARPHRD_INFINIBAND ? 362 IB_LINK_LAYER_INFINIBAND : IB_LINK_LAYER_ETHERNET; 363 364 if (dev_ll != IB_LINK_LAYER_INFINIBAND && 365 id_priv->id.ps == RDMA_PS_IPOIB) 366 return -EINVAL; 367 368 mutex_lock(&lock); 369 iboe_addr_get_sgid(dev_addr, &iboe_gid); 370 memcpy(&gid, dev_addr->src_dev_addr + 371 rdma_addr_gid_offset(dev_addr), sizeof gid); 372 list_for_each_entry(cma_dev, &dev_list, list) { 373 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) { 374 if (rdma_port_get_link_layer(cma_dev->device, port) == dev_ll) { 375 if (rdma_node_get_transport(cma_dev->device->node_type) == RDMA_TRANSPORT_IB && 376 rdma_port_get_link_layer(cma_dev->device, port) == IB_LINK_LAYER_ETHERNET) 377 ret = find_gid_port(cma_dev->device, &iboe_gid, port); 378 else 379 ret = find_gid_port(cma_dev->device, &gid, port); 380 381 if (!ret) { 382 id_priv->id.port_num = port; 383 goto out; 384 } else if (ret == 1) 385 break; 386 } 387 } 388 } 389 390out: 391 if (!ret) 392 cma_attach_to_dev(id_priv, cma_dev); 393 394 mutex_unlock(&lock); 395 return ret; 396} 397 398static void cma_deref_id(struct rdma_id_private *id_priv) 399{ 400 if (atomic_dec_and_test(&id_priv->refcount)) 401 complete(&id_priv->comp); 402} 403 404static int cma_disable_callback(struct rdma_id_private *id_priv, 405 enum rdma_cm_state state) 406{ 407 mutex_lock(&id_priv->handler_mutex); 408 if (id_priv->state != state) { 409 mutex_unlock(&id_priv->handler_mutex); 410 return -EINVAL; 411 } 412 return 0; 413} 414 415struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler, 416 void *context, enum rdma_port_space ps, 417 enum ib_qp_type qp_type) 418{ 419 struct rdma_id_private *id_priv; 420 421 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL); 422 if (!id_priv) 423 return ERR_PTR(-ENOMEM); 424 425 id_priv->owner = task_pid_nr(current); 426 id_priv->state = RDMA_CM_IDLE; 427 id_priv->id.context = context; 428 id_priv->id.event_handler = event_handler; 429 id_priv->id.ps = ps; 430 id_priv->id.qp_type = qp_type; 431 spin_lock_init(&id_priv->lock); 432 mutex_init(&id_priv->qp_mutex); 433 init_completion(&id_priv->comp); 434 atomic_set(&id_priv->refcount, 1); 435 mutex_init(&id_priv->handler_mutex); 436 INIT_LIST_HEAD(&id_priv->listen_list); 437 INIT_LIST_HEAD(&id_priv->mc_list); 438 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num); 439 440 return &id_priv->id; 441} 442EXPORT_SYMBOL(rdma_create_id); 443 444static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp) 445{ 446 struct ib_qp_attr qp_attr; 447 int qp_attr_mask, ret; 448 449 qp_attr.qp_state = IB_QPS_INIT; 450 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 451 if (ret) 452 return ret; 453 454 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); 455 if (ret) 456 return ret; 457 458 qp_attr.qp_state = IB_QPS_RTR; 459 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE); 460 if (ret) 461 return ret; 462 463 qp_attr.qp_state = IB_QPS_RTS; 464 qp_attr.sq_psn = 0; 465 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN); 466 467 return ret; 468} 469 470static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp) 471{ 472 struct ib_qp_attr qp_attr; 473 int qp_attr_mask, ret; 474 475 qp_attr.qp_state = IB_QPS_INIT; 476 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 477 if (ret) 478 return ret; 479 480 return ib_modify_qp(qp, &qp_attr, qp_attr_mask); 481} 482 483int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd, 484 struct ib_qp_init_attr *qp_init_attr) 485{ 486 struct rdma_id_private *id_priv; 487 struct ib_qp *qp; 488 int ret; 489 490 id_priv = container_of(id, struct rdma_id_private, id); 491 if (id->device != pd->device) 492 return -EINVAL; 493 494 qp = ib_create_qp(pd, qp_init_attr); 495 if (IS_ERR(qp)) 496 return PTR_ERR(qp); 497 498 if (id->qp_type == IB_QPT_UD) 499 ret = cma_init_ud_qp(id_priv, qp); 500 else 501 ret = cma_init_conn_qp(id_priv, qp); 502 if (ret) 503 goto err; 504 505 id->qp = qp; 506 id_priv->qp_num = qp->qp_num; 507 id_priv->srq = (qp->srq != NULL); 508 return 0; 509err: 510 ib_destroy_qp(qp); 511 return ret; 512} 513EXPORT_SYMBOL(rdma_create_qp); 514 515void rdma_destroy_qp(struct rdma_cm_id *id) 516{ 517 struct rdma_id_private *id_priv; 518 519 id_priv = container_of(id, struct rdma_id_private, id); 520 mutex_lock(&id_priv->qp_mutex); 521 ib_destroy_qp(id_priv->id.qp); 522 id_priv->id.qp = NULL; 523 mutex_unlock(&id_priv->qp_mutex); 524} 525EXPORT_SYMBOL(rdma_destroy_qp); 526 527static int cma_modify_qp_rtr(struct rdma_id_private *id_priv, 528 struct rdma_conn_param *conn_param) 529{ 530 struct ib_qp_attr qp_attr; 531 int qp_attr_mask, ret; 532 533 mutex_lock(&id_priv->qp_mutex); 534 if (!id_priv->id.qp) { 535 ret = 0; 536 goto out; 537 } 538 539 /* Need to update QP attributes from default values. */ 540 qp_attr.qp_state = IB_QPS_INIT; 541 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 542 if (ret) 543 goto out; 544 545 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); 546 if (ret) 547 goto out; 548 549 qp_attr.qp_state = IB_QPS_RTR; 550 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 551 if (ret) 552 goto out; 553 554 if (conn_param) 555 qp_attr.max_dest_rd_atomic = conn_param->responder_resources; 556 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); 557out: 558 mutex_unlock(&id_priv->qp_mutex); 559 return ret; 560} 561 562static int cma_modify_qp_rts(struct rdma_id_private *id_priv, 563 struct rdma_conn_param *conn_param) 564{ 565 struct ib_qp_attr qp_attr; 566 int qp_attr_mask, ret; 567 568 mutex_lock(&id_priv->qp_mutex); 569 if (!id_priv->id.qp) { 570 ret = 0; 571 goto out; 572 } 573 574 qp_attr.qp_state = IB_QPS_RTS; 575 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 576 if (ret) 577 goto out; 578 579 if (conn_param) 580 qp_attr.max_rd_atomic = conn_param->initiator_depth; 581 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); 582out: 583 mutex_unlock(&id_priv->qp_mutex); 584 return ret; 585} 586 587static int cma_modify_qp_err(struct rdma_id_private *id_priv) 588{ 589 struct ib_qp_attr qp_attr; 590 int ret; 591 592 mutex_lock(&id_priv->qp_mutex); 593 if (!id_priv->id.qp) { 594 ret = 0; 595 goto out; 596 } 597 598 qp_attr.qp_state = IB_QPS_ERR; 599 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE); 600out: 601 mutex_unlock(&id_priv->qp_mutex); 602 return ret; 603} 604 605static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv, 606 struct ib_qp_attr *qp_attr, int *qp_attr_mask) 607{ 608 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 609 int ret; 610 u16 pkey; 611 612 if (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num) == 613 IB_LINK_LAYER_INFINIBAND) 614 pkey = ib_addr_get_pkey(dev_addr); 615 else 616 pkey = 0xffff; 617 618 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num, 619 pkey, &qp_attr->pkey_index); 620 if (ret) 621 return ret; 622 623 qp_attr->port_num = id_priv->id.port_num; 624 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT; 625 626 if (id_priv->id.qp_type == IB_QPT_UD) { 627 ret = cma_set_qkey(id_priv); 628 if (ret) 629 return ret; 630 631 qp_attr->qkey = id_priv->qkey; 632 *qp_attr_mask |= IB_QP_QKEY; 633 } else { 634 qp_attr->qp_access_flags = 0; 635 *qp_attr_mask |= IB_QP_ACCESS_FLAGS; 636 } 637 return 0; 638} 639 640int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr, 641 int *qp_attr_mask) 642{ 643 struct rdma_id_private *id_priv; 644 int ret = 0; 645 646 id_priv = container_of(id, struct rdma_id_private, id); 647 switch (rdma_node_get_transport(id_priv->id.device->node_type)) { 648 case RDMA_TRANSPORT_IB: 649 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD)) 650 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask); 651 else 652 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr, 653 qp_attr_mask); 654 if (qp_attr->qp_state == IB_QPS_RTR) 655 qp_attr->rq_psn = id_priv->seq_num; 656 break; 657 case RDMA_TRANSPORT_IWARP: 658 if (!id_priv->cm_id.iw) { 659 qp_attr->qp_access_flags = 0; 660 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS; 661 } else 662 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr, 663 qp_attr_mask); 664 break; 665 default: 666 ret = -ENOSYS; 667 break; 668 } 669 670 return ret; 671} 672EXPORT_SYMBOL(rdma_init_qp_attr); 673 674static inline int cma_zero_addr(struct sockaddr *addr) 675{ 676 struct in6_addr *ip6; 677 678 if (addr->sa_family == AF_INET) 679 return ipv4_is_zeronet( 680 ((struct sockaddr_in *)addr)->sin_addr.s_addr); 681 else { 682 ip6 = &((struct sockaddr_in6 *) addr)->sin6_addr; 683 return (ip6->s6_addr32[0] | ip6->s6_addr32[1] | 684 ip6->s6_addr32[2] | ip6->s6_addr32[3]) == 0; 685 } 686} 687 688static inline int cma_loopback_addr(struct sockaddr *addr) 689{ 690 if (addr->sa_family == AF_INET) 691 return ipv4_is_loopback( 692 ((struct sockaddr_in *) addr)->sin_addr.s_addr); 693 else 694 return ipv6_addr_loopback( 695 &((struct sockaddr_in6 *) addr)->sin6_addr); 696} 697 698static inline int cma_any_addr(struct sockaddr *addr) 699{ 700 return cma_zero_addr(addr) || cma_loopback_addr(addr); 701} 702 703static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst) 704{ 705 if (src->sa_family != dst->sa_family) 706 return -1; 707 708 switch (src->sa_family) { 709 case AF_INET: 710 return ((struct sockaddr_in *) src)->sin_addr.s_addr != 711 ((struct sockaddr_in *) dst)->sin_addr.s_addr; 712 default: 713 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr, 714 &((struct sockaddr_in6 *) dst)->sin6_addr); 715 } 716} 717 718static inline __be16 cma_port(struct sockaddr *addr) 719{ 720 if (addr->sa_family == AF_INET) 721 return ((struct sockaddr_in *) addr)->sin_port; 722 else 723 return ((struct sockaddr_in6 *) addr)->sin6_port; 724} 725 726static inline int cma_any_port(struct sockaddr *addr) 727{ 728 return !cma_port(addr); 729} 730 731static int cma_get_net_info(void *hdr, enum rdma_port_space ps, 732 u8 *ip_ver, __be16 *port, 733 union cma_ip_addr **src, union cma_ip_addr **dst) 734{ 735 switch (ps) { 736 case RDMA_PS_SDP: 737 if (sdp_get_majv(((struct sdp_hh *) hdr)->sdp_version) != 738 SDP_MAJ_VERSION) 739 return -EINVAL; 740 741 *ip_ver = sdp_get_ip_ver(hdr); 742 *port = ((struct sdp_hh *) hdr)->port; 743 *src = &((struct sdp_hh *) hdr)->src_addr; 744 *dst = &((struct sdp_hh *) hdr)->dst_addr; 745 break; 746 default: 747 if (((struct cma_hdr *) hdr)->cma_version != CMA_VERSION) 748 return -EINVAL; 749 750 *ip_ver = cma_get_ip_ver(hdr); 751 *port = ((struct cma_hdr *) hdr)->port; 752 *src = &((struct cma_hdr *) hdr)->src_addr; 753 *dst = &((struct cma_hdr *) hdr)->dst_addr; 754 break; 755 } 756 757 if (*ip_ver != 4 && *ip_ver != 6) 758 return -EINVAL; 759 return 0; 760} 761 762static void cma_save_net_info(struct rdma_addr *addr, 763 struct rdma_addr *listen_addr, 764 u8 ip_ver, __be16 port, 765 union cma_ip_addr *src, union cma_ip_addr *dst) 766{ 767 struct sockaddr_in *listen4, *ip4; 768 struct sockaddr_in6 *listen6, *ip6; 769 770 switch (ip_ver) { 771 case 4: 772 listen4 = (struct sockaddr_in *) &listen_addr->src_addr; 773 ip4 = (struct sockaddr_in *) &addr->src_addr; 774 ip4->sin_family = listen4->sin_family; 775 ip4->sin_addr.s_addr = dst->ip4.addr; 776 ip4->sin_port = listen4->sin_port; 777 778 ip4 = (struct sockaddr_in *) &addr->dst_addr; 779 ip4->sin_family = listen4->sin_family; 780 ip4->sin_addr.s_addr = src->ip4.addr; 781 ip4->sin_port = port; 782 break; 783 case 6: 784 listen6 = (struct sockaddr_in6 *) &listen_addr->src_addr; 785 ip6 = (struct sockaddr_in6 *) &addr->src_addr; 786 ip6->sin6_family = listen6->sin6_family; 787 ip6->sin6_addr = dst->ip6; 788 ip6->sin6_port = listen6->sin6_port; 789 790 ip6 = (struct sockaddr_in6 *) &addr->dst_addr; 791 ip6->sin6_family = listen6->sin6_family; 792 ip6->sin6_addr = src->ip6; 793 ip6->sin6_port = port; 794 break; 795 default: 796 break; 797 } 798} 799 800static inline int cma_user_data_offset(enum rdma_port_space ps) 801{ 802 switch (ps) { 803 case RDMA_PS_SDP: 804 return 0; 805 default: 806 return sizeof(struct cma_hdr); 807 } 808} 809 810static void cma_cancel_route(struct rdma_id_private *id_priv) 811{ 812 switch (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num)) { 813 case IB_LINK_LAYER_INFINIBAND: 814 if (id_priv->query) 815 ib_sa_cancel_query(id_priv->query_id, id_priv->query); 816 break; 817 default: 818 break; 819 } 820} 821 822static void cma_cancel_listens(struct rdma_id_private *id_priv) 823{ 824 struct rdma_id_private *dev_id_priv; 825 826 /* 827 * Remove from listen_any_list to prevent added devices from spawning 828 * additional listen requests. 829 */ 830 mutex_lock(&lock); 831 list_del(&id_priv->list); 832 833 while (!list_empty(&id_priv->listen_list)) { 834 dev_id_priv = list_entry(id_priv->listen_list.next, 835 struct rdma_id_private, listen_list); 836 /* sync with device removal to avoid duplicate destruction */ 837 list_del_init(&dev_id_priv->list); 838 list_del(&dev_id_priv->listen_list); 839 mutex_unlock(&lock); 840 841 rdma_destroy_id(&dev_id_priv->id); 842 mutex_lock(&lock); 843 } 844 mutex_unlock(&lock); 845} 846 847static void cma_cancel_operation(struct rdma_id_private *id_priv, 848 enum rdma_cm_state state) 849{ 850 switch (state) { 851 case RDMA_CM_ADDR_QUERY: 852 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr); 853 break; 854 case RDMA_CM_ROUTE_QUERY: 855 cma_cancel_route(id_priv); 856 break; 857 case RDMA_CM_LISTEN: 858 if (cma_any_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr) 859 && !id_priv->cma_dev) 860 cma_cancel_listens(id_priv); 861 break; 862 default: 863 break; 864 } 865} 866 867static void cma_release_port(struct rdma_id_private *id_priv) 868{ 869 struct rdma_bind_list *bind_list = id_priv->bind_list; 870 871 if (!bind_list) 872 return; 873 874 mutex_lock(&lock); 875 hlist_del(&id_priv->node); 876 if (hlist_empty(&bind_list->owners)) { 877 idr_remove(bind_list->ps, bind_list->port); 878 kfree(bind_list); 879 } 880 mutex_unlock(&lock); 881} 882 883static void cma_leave_mc_groups(struct rdma_id_private *id_priv) 884{ 885 struct cma_multicast *mc; 886 887 while (!list_empty(&id_priv->mc_list)) { 888 mc = container_of(id_priv->mc_list.next, 889 struct cma_multicast, list); 890 list_del(&mc->list); 891 switch (rdma_port_get_link_layer(id_priv->cma_dev->device, id_priv->id.port_num)) { 892 case IB_LINK_LAYER_INFINIBAND: 893 ib_sa_free_multicast(mc->multicast.ib); 894 kfree(mc); 895 break; 896 case IB_LINK_LAYER_ETHERNET: 897 kref_put(&mc->mcref, release_mc); 898 break; 899 default: 900 break; 901 } 902 } 903} 904 905void rdma_destroy_id(struct rdma_cm_id *id) 906{ 907 struct rdma_id_private *id_priv; 908 enum rdma_cm_state state; 909 910 id_priv = container_of(id, struct rdma_id_private, id); 911 state = cma_exch(id_priv, RDMA_CM_DESTROYING); 912 cma_cancel_operation(id_priv, state); 913 914 /* 915 * Wait for any active callback to finish. New callbacks will find 916 * the id_priv state set to destroying and abort. 917 */ 918 mutex_lock(&id_priv->handler_mutex); 919 mutex_unlock(&id_priv->handler_mutex); 920 921 if (id_priv->cma_dev) { 922 switch (rdma_node_get_transport(id_priv->id.device->node_type)) { 923 case RDMA_TRANSPORT_IB: 924 if (id_priv->cm_id.ib) 925 ib_destroy_cm_id(id_priv->cm_id.ib); 926 break; 927 case RDMA_TRANSPORT_IWARP: 928 if (id_priv->cm_id.iw) 929 iw_destroy_cm_id(id_priv->cm_id.iw); 930 break; 931 default: 932 break; 933 } 934 cma_leave_mc_groups(id_priv); 935 cma_release_dev(id_priv); 936 } 937 938 cma_release_port(id_priv); 939 cma_deref_id(id_priv); 940 wait_for_completion(&id_priv->comp); 941 942 if (id_priv->internal_id) 943 cma_deref_id(id_priv->id.context); 944 945 kfree(id_priv->id.route.path_rec); 946 kfree(id_priv); 947} 948EXPORT_SYMBOL(rdma_destroy_id); 949 950static int cma_rep_recv(struct rdma_id_private *id_priv) 951{ 952 int ret; 953 954 ret = cma_modify_qp_rtr(id_priv, NULL); 955 if (ret) 956 goto reject; 957 958 ret = cma_modify_qp_rts(id_priv, NULL); 959 if (ret) 960 goto reject; 961 962 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0); 963 if (ret) 964 goto reject; 965 966 return 0; 967reject: 968 cma_modify_qp_err(id_priv); 969 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED, 970 NULL, 0, NULL, 0); 971 return ret; 972} 973 974static int cma_verify_rep(struct rdma_id_private *id_priv, void *data) 975{ 976 if (id_priv->id.ps == RDMA_PS_SDP && 977 sdp_get_majv(((struct sdp_hah *) data)->sdp_version) != 978 SDP_MAJ_VERSION) 979 return -EINVAL; 980 981 return 0; 982} 983 984static void cma_set_rep_event_data(struct rdma_cm_event *event, 985 struct ib_cm_rep_event_param *rep_data, 986 void *private_data) 987{ 988 event->param.conn.private_data = private_data; 989 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE; 990 event->param.conn.responder_resources = rep_data->responder_resources; 991 event->param.conn.initiator_depth = rep_data->initiator_depth; 992 event->param.conn.flow_control = rep_data->flow_control; 993 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count; 994 event->param.conn.srq = rep_data->srq; 995 event->param.conn.qp_num = rep_data->remote_qpn; 996} 997 998static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) 999{ 1000 struct rdma_id_private *id_priv = cm_id->context; 1001 struct rdma_cm_event event; 1002 int ret = 0; 1003 1004 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT && 1005 cma_disable_callback(id_priv, RDMA_CM_CONNECT)) || 1006 (ib_event->event == IB_CM_TIMEWAIT_EXIT && 1007 cma_disable_callback(id_priv, RDMA_CM_DISCONNECT))) 1008 return 0; 1009 1010 memset(&event, 0, sizeof event); 1011 switch (ib_event->event) { 1012 case IB_CM_REQ_ERROR: 1013 case IB_CM_REP_ERROR: 1014 event.event = RDMA_CM_EVENT_UNREACHABLE; 1015 event.status = -ETIMEDOUT; 1016 break; 1017 case IB_CM_REP_RECEIVED: 1018 event.status = cma_verify_rep(id_priv, ib_event->private_data); 1019 if (event.status) 1020 event.event = RDMA_CM_EVENT_CONNECT_ERROR; 1021 else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) { 1022 event.status = cma_rep_recv(id_priv); 1023 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR : 1024 RDMA_CM_EVENT_ESTABLISHED; 1025 } else 1026 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE; 1027 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd, 1028 ib_event->private_data); 1029 break; 1030 case IB_CM_RTU_RECEIVED: 1031 case IB_CM_USER_ESTABLISHED: 1032 event.event = RDMA_CM_EVENT_ESTABLISHED; 1033 break; 1034 case IB_CM_DREQ_ERROR: 1035 event.status = -ETIMEDOUT; /* fall through */ 1036 case IB_CM_DREQ_RECEIVED: 1037 case IB_CM_DREP_RECEIVED: 1038 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT, 1039 RDMA_CM_DISCONNECT)) 1040 goto out; 1041 event.event = RDMA_CM_EVENT_DISCONNECTED; 1042 break; 1043 case IB_CM_TIMEWAIT_EXIT: 1044 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT; 1045 break; 1046 case IB_CM_MRA_RECEIVED: 1047 /* ignore event */ 1048 goto out; 1049 case IB_CM_REJ_RECEIVED: 1050 cma_modify_qp_err(id_priv); 1051 event.status = ib_event->param.rej_rcvd.reason; 1052 event.event = RDMA_CM_EVENT_REJECTED; 1053 event.param.conn.private_data = ib_event->private_data; 1054 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE; 1055 break; 1056 default: 1057 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n", 1058 ib_event->event); 1059 goto out; 1060 } 1061 1062 ret = id_priv->id.event_handler(&id_priv->id, &event); 1063 if (ret) { 1064 /* Destroy the CM ID by returning a non-zero value. */ 1065 id_priv->cm_id.ib = NULL; 1066 cma_exch(id_priv, RDMA_CM_DESTROYING); 1067 mutex_unlock(&id_priv->handler_mutex); 1068 rdma_destroy_id(&id_priv->id); 1069 return ret; 1070 } 1071out: 1072 mutex_unlock(&id_priv->handler_mutex); 1073 return ret; 1074} 1075 1076static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id, 1077 struct ib_cm_event *ib_event) 1078{ 1079 struct rdma_id_private *id_priv; 1080 struct rdma_cm_id *id; 1081 struct rdma_route *rt; 1082 union cma_ip_addr *src, *dst; 1083 __be16 port; 1084 u8 ip_ver; 1085 int ret; 1086 1087 if (cma_get_net_info(ib_event->private_data, listen_id->ps, 1088 &ip_ver, &port, &src, &dst)) 1089 return NULL; 1090 1091 id = rdma_create_id(listen_id->event_handler, listen_id->context, 1092 listen_id->ps, ib_event->param.req_rcvd.qp_type); 1093 if (IS_ERR(id)) 1094 return NULL; 1095 1096 cma_save_net_info(&id->route.addr, &listen_id->route.addr, 1097 ip_ver, port, src, dst); 1098 1099 rt = &id->route; 1100 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1; 1101 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths, 1102 GFP_KERNEL); 1103 if (!rt->path_rec) 1104 goto err; 1105 1106 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path; 1107 if (rt->num_paths == 2) 1108 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path; 1109 1110 if (cma_any_addr((struct sockaddr *) &rt->addr.src_addr)) { 1111 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND; 1112 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid); 1113 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey)); 1114 } else { 1115 ret = rdma_translate_ip((struct sockaddr *) &rt->addr.src_addr, 1116 &rt->addr.dev_addr); 1117 if (ret) 1118 goto err; 1119 } 1120 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid); 1121 1122 id_priv = container_of(id, struct rdma_id_private, id); 1123 id_priv->state = RDMA_CM_CONNECT; 1124 return id_priv; 1125 1126err: 1127 rdma_destroy_id(id); 1128 return NULL; 1129} 1130 1131static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id, 1132 struct ib_cm_event *ib_event) 1133{ 1134 struct rdma_id_private *id_priv; 1135 struct rdma_cm_id *id; 1136 union cma_ip_addr *src, *dst; 1137 __be16 port; 1138 u8 ip_ver; 1139 int ret; 1140 1141 id = rdma_create_id(listen_id->event_handler, listen_id->context, 1142 listen_id->ps, IB_QPT_UD); 1143 if (IS_ERR(id)) 1144 return NULL; 1145 1146 1147 if (cma_get_net_info(ib_event->private_data, listen_id->ps, 1148 &ip_ver, &port, &src, &dst)) 1149 goto err; 1150 1151 cma_save_net_info(&id->route.addr, &listen_id->route.addr, 1152 ip_ver, port, src, dst); 1153 1154 if (!cma_any_addr((struct sockaddr *) &id->route.addr.src_addr)) { 1155 ret = rdma_translate_ip((struct sockaddr *) &id->route.addr.src_addr, 1156 &id->route.addr.dev_addr); 1157 if (ret) 1158 goto err; 1159 } 1160 1161 id_priv = container_of(id, struct rdma_id_private, id); 1162 id_priv->state = RDMA_CM_CONNECT; 1163 return id_priv; 1164err: 1165 rdma_destroy_id(id); 1166 return NULL; 1167} 1168 1169static void cma_set_req_event_data(struct rdma_cm_event *event, 1170 struct ib_cm_req_event_param *req_data, 1171 void *private_data, int offset) 1172{ 1173 event->param.conn.private_data = private_data + offset; 1174 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset; 1175 event->param.conn.responder_resources = req_data->responder_resources; 1176 event->param.conn.initiator_depth = req_data->initiator_depth; 1177 event->param.conn.flow_control = req_data->flow_control; 1178 event->param.conn.retry_count = req_data->retry_count; 1179 event->param.conn.rnr_retry_count = req_data->rnr_retry_count; 1180 event->param.conn.srq = req_data->srq; 1181 event->param.conn.qp_num = req_data->remote_qpn; 1182} 1183 1184static int cma_check_req_qp_type(struct rdma_cm_id *id, struct ib_cm_event *ib_event) 1185{ 1186 return (((ib_event->event == IB_CM_REQ_RECEIVED) || 1187 (ib_event->param.req_rcvd.qp_type == id->qp_type)) || 1188 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) && 1189 (id->qp_type == IB_QPT_UD)) || 1190 (!id->qp_type)); 1191} 1192 1193static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) 1194{ 1195 struct rdma_id_private *listen_id, *conn_id; 1196 struct rdma_cm_event event; 1197 int offset, ret; 1198 1199 listen_id = cm_id->context; 1200 if (!cma_check_req_qp_type(&listen_id->id, ib_event)) 1201 return -EINVAL; 1202 1203 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN)) 1204 return -ECONNABORTED; 1205 1206 memset(&event, 0, sizeof event); 1207 offset = cma_user_data_offset(listen_id->id.ps); 1208 event.event = RDMA_CM_EVENT_CONNECT_REQUEST; 1209 if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) { 1210 conn_id = cma_new_udp_id(&listen_id->id, ib_event); 1211 event.param.ud.private_data = ib_event->private_data + offset; 1212 event.param.ud.private_data_len = 1213 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset; 1214 } else { 1215 conn_id = cma_new_conn_id(&listen_id->id, ib_event); 1216 cma_set_req_event_data(&event, &ib_event->param.req_rcvd, 1217 ib_event->private_data, offset); 1218 } 1219 if (!conn_id) { 1220 ret = -ENOMEM; 1221 goto out; 1222 } 1223 1224 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING); 1225 ret = cma_acquire_dev(conn_id); 1226 if (ret) 1227 goto release_conn_id; 1228 1229 conn_id->cm_id.ib = cm_id; 1230 cm_id->context = conn_id; 1231 cm_id->cm_handler = cma_ib_handler; 1232 1233 /* 1234 * Protect against the user destroying conn_id from another thread 1235 * until we're done accessing it. 1236 */ 1237 atomic_inc(&conn_id->refcount); 1238 ret = conn_id->id.event_handler(&conn_id->id, &event); 1239 if (!ret) { 1240 /* 1241 * Acquire mutex to prevent user executing rdma_destroy_id() 1242 * while we're accessing the cm_id. 1243 */ 1244 mutex_lock(&lock); 1245 if (cma_comp(conn_id, RDMA_CM_CONNECT) && (conn_id->id.qp_type != IB_QPT_UD)) 1246 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0); 1247 mutex_unlock(&lock); 1248 mutex_unlock(&conn_id->handler_mutex); 1249 cma_deref_id(conn_id); 1250 goto out; 1251 } 1252 cma_deref_id(conn_id); 1253 1254 /* Destroy the CM ID by returning a non-zero value. */ 1255 conn_id->cm_id.ib = NULL; 1256 1257release_conn_id: 1258 cma_exch(conn_id, RDMA_CM_DESTROYING); 1259 mutex_unlock(&conn_id->handler_mutex); 1260 rdma_destroy_id(&conn_id->id); 1261 1262out: 1263 mutex_unlock(&listen_id->handler_mutex); 1264 return ret; 1265} 1266 1267static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr) 1268{ 1269 return cpu_to_be64(((u64)ps << 16) + be16_to_cpu(cma_port(addr))); 1270} 1271 1272static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr, 1273 struct ib_cm_compare_data *compare) 1274{ 1275 struct cma_hdr *cma_data, *cma_mask; 1276 struct sdp_hh *sdp_data, *sdp_mask; 1277 __be32 ip4_addr; 1278 struct in6_addr ip6_addr; 1279 1280 memset(compare, 0, sizeof *compare); 1281 cma_data = (void *) compare->data; 1282 cma_mask = (void *) compare->mask; 1283 sdp_data = (void *) compare->data; 1284 sdp_mask = (void *) compare->mask; 1285 1286 switch (addr->sa_family) { 1287 case AF_INET: 1288 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr; 1289 if (ps == RDMA_PS_SDP) { 1290 sdp_set_ip_ver(sdp_data, 4); 1291 sdp_set_ip_ver(sdp_mask, 0xF); 1292 sdp_data->dst_addr.ip4.addr = ip4_addr; 1293 sdp_mask->dst_addr.ip4.addr = htonl(~0); 1294 } else { 1295 cma_set_ip_ver(cma_data, 4); 1296 cma_set_ip_ver(cma_mask, 0xF); 1297 cma_data->dst_addr.ip4.addr = ip4_addr; 1298 cma_mask->dst_addr.ip4.addr = htonl(~0); 1299 } 1300 break; 1301 case AF_INET6: 1302 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr; 1303 if (ps == RDMA_PS_SDP) { 1304 sdp_set_ip_ver(sdp_data, 6); 1305 sdp_set_ip_ver(sdp_mask, 0xF); 1306 sdp_data->dst_addr.ip6 = ip6_addr; 1307 memset(&sdp_mask->dst_addr.ip6, 0xFF, 1308 sizeof sdp_mask->dst_addr.ip6); 1309 } else { 1310 cma_set_ip_ver(cma_data, 6); 1311 cma_set_ip_ver(cma_mask, 0xF); 1312 cma_data->dst_addr.ip6 = ip6_addr; 1313 memset(&cma_mask->dst_addr.ip6, 0xFF, 1314 sizeof cma_mask->dst_addr.ip6); 1315 } 1316 break; 1317 default: 1318 break; 1319 } 1320} 1321 1322static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event) 1323{ 1324 struct rdma_id_private *id_priv = iw_id->context; 1325 struct rdma_cm_event event; 1326 struct sockaddr_in *sin; 1327 int ret = 0; 1328 1329 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT)) 1330 return 0; 1331 1332 memset(&event, 0, sizeof event); 1333 switch (iw_event->event) { 1334 case IW_CM_EVENT_CLOSE: 1335 event.event = RDMA_CM_EVENT_DISCONNECTED; 1336 break; 1337 case IW_CM_EVENT_CONNECT_REPLY: 1338 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; 1339 *sin = iw_event->local_addr; 1340 sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr; 1341 *sin = iw_event->remote_addr; 1342 switch (iw_event->status) { 1343 case 0: 1344 event.event = RDMA_CM_EVENT_ESTABLISHED; 1345 event.param.conn.initiator_depth = iw_event->ird; 1346 event.param.conn.responder_resources = iw_event->ord; 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 event.param.conn.initiator_depth = iw_event->ird; 1363 event.param.conn.responder_resources = iw_event->ord; 1364 break; 1365 default: 1366 BUG_ON(1); 1367 } 1368 1369 event.status = iw_event->status; 1370 event.param.conn.private_data = iw_event->private_data; 1371 event.param.conn.private_data_len = iw_event->private_data_len; 1372 ret = id_priv->id.event_handler(&id_priv->id, &event); 1373 if (ret) { 1374 /* Destroy the CM ID by returning a non-zero value. */ 1375 id_priv->cm_id.iw = NULL; 1376 cma_exch(id_priv, RDMA_CM_DESTROYING); 1377 mutex_unlock(&id_priv->handler_mutex); 1378 rdma_destroy_id(&id_priv->id); 1379 return ret; 1380 } 1381 1382 mutex_unlock(&id_priv->handler_mutex); 1383 return ret; 1384} 1385 1386static int iw_conn_req_handler(struct iw_cm_id *cm_id, 1387 struct iw_cm_event *iw_event) 1388{ 1389 struct rdma_cm_id *new_cm_id; 1390 struct rdma_id_private *listen_id, *conn_id; 1391 struct sockaddr_in *sin; 1392 struct net_device *dev = NULL; 1393 struct rdma_cm_event event; 1394 int ret; 1395 struct ib_device_attr attr; 1396 1397 listen_id = cm_id->context; 1398 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN)) 1399 return -ECONNABORTED; 1400 1401 /* Create a new RDMA id for the new IW CM ID */ 1402 new_cm_id = rdma_create_id(listen_id->id.event_handler, 1403 listen_id->id.context, 1404 RDMA_PS_TCP, IB_QPT_RC); 1405 if (IS_ERR(new_cm_id)) { 1406 ret = -ENOMEM; 1407 goto out; 1408 } 1409 conn_id = container_of(new_cm_id, struct rdma_id_private, id); 1410 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING); 1411 conn_id->state = RDMA_CM_CONNECT; 1412 1413 dev = ip_dev_find(&init_net, iw_event->local_addr.sin_addr.s_addr); 1414 if (!dev) { 1415 ret = -EADDRNOTAVAIL; 1416 mutex_unlock(&conn_id->handler_mutex); 1417 rdma_destroy_id(new_cm_id); 1418 goto out; 1419 } 1420 ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL); 1421 if (ret) { 1422 mutex_unlock(&conn_id->handler_mutex); 1423 rdma_destroy_id(new_cm_id); 1424 goto out; 1425 } 1426 1427 ret = cma_acquire_dev(conn_id); 1428 if (ret) { 1429 mutex_unlock(&conn_id->handler_mutex); 1430 rdma_destroy_id(new_cm_id); 1431 goto out; 1432 } 1433 1434 conn_id->cm_id.iw = cm_id; 1435 cm_id->context = conn_id; 1436 cm_id->cm_handler = cma_iw_handler; 1437 1438 sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr; 1439 *sin = iw_event->local_addr; 1440 sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr; 1441 *sin = iw_event->remote_addr; 1442 1443 ret = ib_query_device(conn_id->id.device, &attr); 1444 if (ret) { 1445 mutex_unlock(&conn_id->handler_mutex); 1446 rdma_destroy_id(new_cm_id); 1447 goto out; 1448 } 1449 1450 memset(&event, 0, sizeof event); 1451 event.event = RDMA_CM_EVENT_CONNECT_REQUEST; 1452 event.param.conn.private_data = iw_event->private_data; 1453 event.param.conn.private_data_len = iw_event->private_data_len; 1454 event.param.conn.initiator_depth = iw_event->ird; 1455 event.param.conn.responder_resources = iw_event->ord; 1456 1457 /* 1458 * Protect against the user destroying conn_id from another thread 1459 * until we're done accessing it. 1460 */ 1461 atomic_inc(&conn_id->refcount); 1462 ret = conn_id->id.event_handler(&conn_id->id, &event); 1463 if (ret) { 1464 /* User wants to destroy the CM ID */ 1465 conn_id->cm_id.iw = NULL; 1466 cma_exch(conn_id, RDMA_CM_DESTROYING); 1467 mutex_unlock(&conn_id->handler_mutex); 1468 cma_deref_id(conn_id); 1469 rdma_destroy_id(&conn_id->id); 1470 goto out; 1471 } 1472 1473 mutex_unlock(&conn_id->handler_mutex); 1474 cma_deref_id(conn_id); 1475 1476out: 1477 if (dev) 1478 dev_put(dev); 1479 mutex_unlock(&listen_id->handler_mutex); 1480 return ret; 1481} 1482 1483static int cma_ib_listen(struct rdma_id_private *id_priv) 1484{ 1485 struct ib_cm_compare_data compare_data; 1486 struct sockaddr *addr; 1487 struct ib_cm_id *id; 1488 __be64 svc_id; 1489 int ret; 1490 1491 id = ib_create_cm_id(id_priv->id.device, cma_req_handler, id_priv); 1492 if (IS_ERR(id)) 1493 return PTR_ERR(id); 1494 1495 id_priv->cm_id.ib = id; 1496 1497 addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr; 1498 svc_id = cma_get_service_id(id_priv->id.ps, addr); 1499 if (cma_any_addr(addr)) 1500 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL); 1501 else { 1502 cma_set_compare_data(id_priv->id.ps, addr, &compare_data); 1503 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data); 1504 } 1505 1506 if (ret) { 1507 ib_destroy_cm_id(id_priv->cm_id.ib); 1508 id_priv->cm_id.ib = NULL; 1509 } 1510 1511 return ret; 1512} 1513 1514static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog) 1515{ 1516 int ret; 1517 struct sockaddr_in *sin; 1518 struct iw_cm_id *id; 1519 1520 id = iw_create_cm_id(id_priv->id.device, 1521 iw_conn_req_handler, 1522 id_priv); 1523 if (IS_ERR(id)) 1524 return PTR_ERR(id); 1525 1526 id_priv->cm_id.iw = id; 1527 1528 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; 1529 id_priv->cm_id.iw->local_addr = *sin; 1530 1531 ret = iw_cm_listen(id_priv->cm_id.iw, backlog); 1532 1533 if (ret) { 1534 iw_destroy_cm_id(id_priv->cm_id.iw); 1535 id_priv->cm_id.iw = NULL; 1536 } 1537 1538 return ret; 1539} 1540 1541static int cma_listen_handler(struct rdma_cm_id *id, 1542 struct rdma_cm_event *event) 1543{ 1544 struct rdma_id_private *id_priv = id->context; 1545 1546 id->context = id_priv->id.context; 1547 id->event_handler = id_priv->id.event_handler; 1548 return id_priv->id.event_handler(id, event); 1549} 1550 1551static void cma_listen_on_dev(struct rdma_id_private *id_priv, 1552 struct cma_device *cma_dev) 1553{ 1554 struct rdma_id_private *dev_id_priv; 1555 struct rdma_cm_id *id; 1556 int ret; 1557 1558 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps, 1559 id_priv->id.qp_type); 1560 if (IS_ERR(id)) 1561 return; 1562 1563 dev_id_priv = container_of(id, struct rdma_id_private, id); 1564 1565 dev_id_priv->state = RDMA_CM_ADDR_BOUND; 1566 memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr, 1567 ip_addr_size((struct sockaddr *) &id_priv->id.route.addr.src_addr)); 1568 1569 cma_attach_to_dev(dev_id_priv, cma_dev); 1570 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list); 1571 atomic_inc(&id_priv->refcount); 1572 dev_id_priv->internal_id = 1; 1573 1574 ret = rdma_listen(id, id_priv->backlog); 1575 if (ret) 1576 printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, " 1577 "listening on device %s\n", ret, cma_dev->device->name); 1578} 1579 1580static void cma_listen_on_all(struct rdma_id_private *id_priv) 1581{ 1582 struct cma_device *cma_dev; 1583 1584 mutex_lock(&lock); 1585 list_add_tail(&id_priv->list, &listen_any_list); 1586 list_for_each_entry(cma_dev, &dev_list, list) 1587 cma_listen_on_dev(id_priv, cma_dev); 1588 mutex_unlock(&lock); 1589} 1590 1591void rdma_set_service_type(struct rdma_cm_id *id, int tos) 1592{ 1593 struct rdma_id_private *id_priv; 1594 1595 id_priv = container_of(id, struct rdma_id_private, id); 1596 id_priv->tos = (u8) tos; 1597} 1598EXPORT_SYMBOL(rdma_set_service_type); 1599 1600static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec, 1601 void *context) 1602{ 1603 struct cma_work *work = context; 1604 struct rdma_route *route; 1605 1606 route = &work->id->id.route; 1607 1608 if (!status) { 1609 route->num_paths = 1; 1610 *route->path_rec = *path_rec; 1611 } else { 1612 work->old_state = RDMA_CM_ROUTE_QUERY; 1613 work->new_state = RDMA_CM_ADDR_RESOLVED; 1614 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR; 1615 work->event.status = status; 1616 } 1617 1618 queue_work(cma_wq, &work->work); 1619} 1620 1621static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms, 1622 struct cma_work *work) 1623{ 1624 struct rdma_addr *addr = &id_priv->id.route.addr; 1625 struct ib_sa_path_rec path_rec; 1626 ib_sa_comp_mask comp_mask; 1627 struct sockaddr_in6 *sin6; 1628 1629 memset(&path_rec, 0, sizeof path_rec); 1630 rdma_addr_get_sgid(&addr->dev_addr, &path_rec.sgid); 1631 rdma_addr_get_dgid(&addr->dev_addr, &path_rec.dgid); 1632 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(&addr->dev_addr)); 1633 path_rec.numb_path = 1; 1634 path_rec.reversible = 1; 1635 path_rec.service_id = cma_get_service_id(id_priv->id.ps, 1636 (struct sockaddr *) &addr->dst_addr); 1637 1638 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID | 1639 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH | 1640 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID; 1641 1642 if (addr->src_addr.ss_family == AF_INET) { 1643 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos); 1644 comp_mask |= IB_SA_PATH_REC_QOS_CLASS; 1645 } else { 1646 sin6 = (struct sockaddr_in6 *) &addr->src_addr; 1647 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20); 1648 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS; 1649 } 1650 1651 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device, 1652 id_priv->id.port_num, &path_rec, 1653 comp_mask, timeout_ms, 1654 GFP_KERNEL, cma_query_handler, 1655 work, &id_priv->query); 1656 1657 return (id_priv->query_id < 0) ? id_priv->query_id : 0; 1658} 1659 1660static void cma_work_handler(struct work_struct *_work) 1661{ 1662 struct cma_work *work = container_of(_work, struct cma_work, work); 1663 struct rdma_id_private *id_priv = work->id; 1664 int destroy = 0; 1665 1666 mutex_lock(&id_priv->handler_mutex); 1667 if (!cma_comp_exch(id_priv, work->old_state, work->new_state)) 1668 goto out; 1669 1670 if (id_priv->id.event_handler(&id_priv->id, &work->event)) { 1671 cma_exch(id_priv, RDMA_CM_DESTROYING); 1672 destroy = 1; 1673 } 1674out: 1675 mutex_unlock(&id_priv->handler_mutex); 1676 cma_deref_id(id_priv); 1677 if (destroy) 1678 rdma_destroy_id(&id_priv->id); 1679 kfree(work); 1680} 1681 1682static void cma_ndev_work_handler(struct work_struct *_work) 1683{ 1684 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work); 1685 struct rdma_id_private *id_priv = work->id; 1686 int destroy = 0; 1687 1688 mutex_lock(&id_priv->handler_mutex); 1689 if (id_priv->state == RDMA_CM_DESTROYING || 1690 id_priv->state == RDMA_CM_DEVICE_REMOVAL) 1691 goto out; 1692 1693 if (id_priv->id.event_handler(&id_priv->id, &work->event)) { 1694 cma_exch(id_priv, RDMA_CM_DESTROYING); 1695 destroy = 1; 1696 } 1697 1698out: 1699 mutex_unlock(&id_priv->handler_mutex); 1700 cma_deref_id(id_priv); 1701 if (destroy) 1702 rdma_destroy_id(&id_priv->id); 1703 kfree(work); 1704} 1705 1706static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms) 1707{ 1708 struct rdma_route *route = &id_priv->id.route; 1709 struct cma_work *work; 1710 int ret; 1711 1712 work = kzalloc(sizeof *work, GFP_KERNEL); 1713 if (!work) 1714 return -ENOMEM; 1715 1716 work->id = id_priv; 1717 INIT_WORK(&work->work, cma_work_handler); 1718 work->old_state = RDMA_CM_ROUTE_QUERY; 1719 work->new_state = RDMA_CM_ROUTE_RESOLVED; 1720 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 1721 1722 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL); 1723 if (!route->path_rec) { 1724 ret = -ENOMEM; 1725 goto err1; 1726 } 1727 1728 ret = cma_query_ib_route(id_priv, timeout_ms, work); 1729 if (ret) 1730 goto err2; 1731 1732 return 0; 1733err2: 1734 kfree(route->path_rec); 1735 route->path_rec = NULL; 1736err1: 1737 kfree(work); 1738 return ret; 1739} 1740 1741int rdma_set_ib_paths(struct rdma_cm_id *id, 1742 struct ib_sa_path_rec *path_rec, int num_paths) 1743{ 1744 struct rdma_id_private *id_priv; 1745 int ret; 1746 1747 id_priv = container_of(id, struct rdma_id_private, id); 1748 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, 1749 RDMA_CM_ROUTE_RESOLVED)) 1750 return -EINVAL; 1751 1752 id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths, 1753 GFP_KERNEL); 1754 if (!id->route.path_rec) { 1755 ret = -ENOMEM; 1756 goto err; 1757 } 1758 1759 id->route.num_paths = num_paths; 1760 return 0; 1761err: 1762 cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED); 1763 return ret; 1764} 1765EXPORT_SYMBOL(rdma_set_ib_paths); 1766 1767static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms) 1768{ 1769 struct cma_work *work; 1770 1771 work = kzalloc(sizeof *work, GFP_KERNEL); 1772 if (!work) 1773 return -ENOMEM; 1774 1775 work->id = id_priv; 1776 INIT_WORK(&work->work, cma_work_handler); 1777 work->old_state = RDMA_CM_ROUTE_QUERY; 1778 work->new_state = RDMA_CM_ROUTE_RESOLVED; 1779 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 1780 queue_work(cma_wq, &work->work); 1781 return 0; 1782} 1783 1784static int cma_resolve_iboe_route(struct rdma_id_private *id_priv) 1785{ 1786 struct rdma_route *route = &id_priv->id.route; 1787 struct rdma_addr *addr = &route->addr; 1788 struct cma_work *work; 1789 int ret; 1790 struct sockaddr_in *src_addr = (struct sockaddr_in *)&route->addr.src_addr; 1791 struct sockaddr_in *dst_addr = (struct sockaddr_in *)&route->addr.dst_addr; 1792 struct net_device *ndev = NULL; 1793 u16 vid; 1794 1795 if (src_addr->sin_family != dst_addr->sin_family) 1796 return -EINVAL; 1797 1798 work = kzalloc(sizeof *work, GFP_KERNEL); 1799 if (!work) 1800 return -ENOMEM; 1801 1802 work->id = id_priv; 1803 INIT_WORK(&work->work, cma_work_handler); 1804 1805 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL); 1806 if (!route->path_rec) { 1807 ret = -ENOMEM; 1808 goto err1; 1809 } 1810 1811 route->num_paths = 1; 1812 1813 if (addr->dev_addr.bound_dev_if) 1814 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if); 1815 if (!ndev) { 1816 ret = -ENODEV; 1817 goto err2; 1818 } 1819 1820 vid = rdma_vlan_dev_vlan_id(ndev); 1821 1822 iboe_mac_vlan_to_ll(&route->path_rec->sgid, addr->dev_addr.src_dev_addr, vid); 1823 iboe_mac_vlan_to_ll(&route->path_rec->dgid, addr->dev_addr.dst_dev_addr, vid); 1824 1825 route->path_rec->hop_limit = 1; 1826 route->path_rec->reversible = 1; 1827 route->path_rec->pkey = cpu_to_be16(0xffff); 1828 route->path_rec->mtu_selector = IB_SA_EQ; 1829 route->path_rec->sl = id_priv->tos >> 5; 1830 1831 route->path_rec->mtu = iboe_get_mtu(ndev->mtu); 1832 route->path_rec->rate_selector = IB_SA_EQ; 1833 route->path_rec->rate = iboe_get_rate(ndev); 1834 dev_put(ndev); 1835 route->path_rec->packet_life_time_selector = IB_SA_EQ; 1836 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME; 1837 if (!route->path_rec->mtu) { 1838 ret = -EINVAL; 1839 goto err2; 1840 } 1841 1842 work->old_state = RDMA_CM_ROUTE_QUERY; 1843 work->new_state = RDMA_CM_ROUTE_RESOLVED; 1844 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 1845 work->event.status = 0; 1846 1847 queue_work(cma_wq, &work->work); 1848 1849 return 0; 1850 1851err2: 1852 kfree(route->path_rec); 1853 route->path_rec = NULL; 1854err1: 1855 kfree(work); 1856 return ret; 1857} 1858 1859int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms) 1860{ 1861 struct rdma_id_private *id_priv; 1862 int ret; 1863 1864 id_priv = container_of(id, struct rdma_id_private, id); 1865 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY)) 1866 return -EINVAL; 1867 1868 atomic_inc(&id_priv->refcount); 1869 switch (rdma_node_get_transport(id->device->node_type)) { 1870 case RDMA_TRANSPORT_IB: 1871 switch (rdma_port_get_link_layer(id->device, id->port_num)) { 1872 case IB_LINK_LAYER_INFINIBAND: 1873 ret = cma_resolve_ib_route(id_priv, timeout_ms); 1874 break; 1875 case IB_LINK_LAYER_ETHERNET: 1876 ret = cma_resolve_iboe_route(id_priv); 1877 break; 1878 default: 1879 ret = -ENOSYS; 1880 } 1881 break; 1882 case RDMA_TRANSPORT_IWARP: 1883 ret = cma_resolve_iw_route(id_priv, timeout_ms); 1884 break; 1885 default: 1886 ret = -ENOSYS; 1887 break; 1888 } 1889 if (ret) 1890 goto err; 1891 1892 return 0; 1893err: 1894 cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED); 1895 cma_deref_id(id_priv); 1896 return ret; 1897} 1898EXPORT_SYMBOL(rdma_resolve_route); 1899 1900static int cma_bind_loopback(struct rdma_id_private *id_priv) 1901{ 1902 struct cma_device *cma_dev; 1903 struct ib_port_attr port_attr; 1904 union ib_gid gid; 1905 u16 pkey; 1906 int ret; 1907 u8 p; 1908 1909 mutex_lock(&lock); 1910 if (list_empty(&dev_list)) { 1911 ret = -ENODEV; 1912 goto out; 1913 } 1914 list_for_each_entry(cma_dev, &dev_list, list) 1915 for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p) 1916 if (!ib_query_port(cma_dev->device, p, &port_attr) && 1917 port_attr.state == IB_PORT_ACTIVE) 1918 goto port_found; 1919 1920 p = 1; 1921 cma_dev = list_entry(dev_list.next, struct cma_device, list); 1922 1923port_found: 1924 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid); 1925 if (ret) 1926 goto out; 1927 1928 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey); 1929 if (ret) 1930 goto out; 1931 1932 id_priv->id.route.addr.dev_addr.dev_type = 1933 (rdma_port_get_link_layer(cma_dev->device, p) == IB_LINK_LAYER_INFINIBAND) ? 1934 ARPHRD_INFINIBAND : ARPHRD_ETHER; 1935 1936 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid); 1937 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey); 1938 id_priv->id.port_num = p; 1939 cma_attach_to_dev(id_priv, cma_dev); 1940out: 1941 mutex_unlock(&lock); 1942 return ret; 1943} 1944 1945static void addr_handler(int status, struct sockaddr *src_addr, 1946 struct rdma_dev_addr *dev_addr, void *context) 1947{ 1948 struct rdma_id_private *id_priv = context; 1949 struct rdma_cm_event event; 1950 1951 memset(&event, 0, sizeof event); 1952 mutex_lock(&id_priv->handler_mutex); 1953 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, 1954 RDMA_CM_ADDR_RESOLVED)) 1955 goto out; 1956 1957 if (!status && !id_priv->cma_dev) 1958 status = cma_acquire_dev(id_priv); 1959 1960 if (status) { 1961 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, 1962 RDMA_CM_ADDR_BOUND)) 1963 goto out; 1964 event.event = RDMA_CM_EVENT_ADDR_ERROR; 1965 event.status = status; 1966 } else { 1967 memcpy(&id_priv->id.route.addr.src_addr, src_addr, 1968 ip_addr_size(src_addr)); 1969 event.event = RDMA_CM_EVENT_ADDR_RESOLVED; 1970 } 1971 1972 if (id_priv->id.event_handler(&id_priv->id, &event)) { 1973 cma_exch(id_priv, RDMA_CM_DESTROYING); 1974 mutex_unlock(&id_priv->handler_mutex); 1975 cma_deref_id(id_priv); 1976 rdma_destroy_id(&id_priv->id); 1977 return; 1978 } 1979out: 1980 mutex_unlock(&id_priv->handler_mutex); 1981 cma_deref_id(id_priv); 1982} 1983 1984static int cma_resolve_loopback(struct rdma_id_private *id_priv) 1985{ 1986 struct cma_work *work; 1987 struct sockaddr *src, *dst; 1988 union ib_gid gid; 1989 int ret; 1990 1991 work = kzalloc(sizeof *work, GFP_KERNEL); 1992 if (!work) 1993 return -ENOMEM; 1994 1995 if (!id_priv->cma_dev) { 1996 ret = cma_bind_loopback(id_priv); 1997 if (ret) 1998 goto err; 1999 } 2000 2001 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid); 2002 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid); 2003 2004 src = (struct sockaddr *) &id_priv->id.route.addr.src_addr; 2005 if (cma_zero_addr(src)) { 2006 dst = (struct sockaddr *) &id_priv->id.route.addr.dst_addr; 2007 if ((src->sa_family = dst->sa_family) == AF_INET) { 2008 ((struct sockaddr_in *)src)->sin_addr = 2009 ((struct sockaddr_in *)dst)->sin_addr; 2010 } else { 2011 ((struct sockaddr_in6 *)src)->sin6_addr = 2012 ((struct sockaddr_in6 *)dst)->sin6_addr; 2013 } 2014 } 2015 2016 work->id = id_priv; 2017 INIT_WORK(&work->work, cma_work_handler); 2018 work->old_state = RDMA_CM_ADDR_QUERY; 2019 work->new_state = RDMA_CM_ADDR_RESOLVED; 2020 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED; 2021 queue_work(cma_wq, &work->work); 2022 return 0; 2023err: 2024 kfree(work); 2025 return ret; 2026} 2027 2028static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, 2029 struct sockaddr *dst_addr) 2030{ 2031 if (!src_addr || !src_addr->sa_family) { 2032 src_addr = (struct sockaddr *) &id->route.addr.src_addr; 2033 if ((src_addr->sa_family = dst_addr->sa_family) == AF_INET6) { 2034 ((struct sockaddr_in6 *) src_addr)->sin6_scope_id = 2035 ((struct sockaddr_in6 *) dst_addr)->sin6_scope_id; 2036 } 2037 } 2038 return rdma_bind_addr(id, src_addr); 2039} 2040 2041int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, 2042 struct sockaddr *dst_addr, int timeout_ms) 2043{ 2044 struct rdma_id_private *id_priv; 2045 int ret; 2046 2047 id_priv = container_of(id, struct rdma_id_private, id); 2048 if (id_priv->state == RDMA_CM_IDLE) { 2049 ret = cma_bind_addr(id, src_addr, dst_addr); 2050 if (ret) 2051 return ret; 2052 } 2053 2054 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY)) 2055 return -EINVAL; 2056 2057 atomic_inc(&id_priv->refcount); 2058 memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr)); 2059 if (cma_any_addr(dst_addr)) 2060 ret = cma_resolve_loopback(id_priv); 2061 else 2062 ret = rdma_resolve_ip(&addr_client, (struct sockaddr *) &id->route.addr.src_addr, 2063 dst_addr, &id->route.addr.dev_addr, 2064 timeout_ms, addr_handler, id_priv); 2065 if (ret) 2066 goto err; 2067 2068 return 0; 2069err: 2070 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND); 2071 cma_deref_id(id_priv); 2072 return ret; 2073} 2074EXPORT_SYMBOL(rdma_resolve_addr); 2075 2076int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse) 2077{ 2078 struct rdma_id_private *id_priv; 2079 unsigned long flags; 2080 int ret; 2081 2082 id_priv = container_of(id, struct rdma_id_private, id); 2083 spin_lock_irqsave(&id_priv->lock, flags); 2084 if (id_priv->state == RDMA_CM_IDLE) { 2085 id_priv->reuseaddr = reuse; 2086 ret = 0; 2087 } else { 2088 ret = -EINVAL; 2089 } 2090 spin_unlock_irqrestore(&id_priv->lock, flags); 2091 return ret; 2092} 2093EXPORT_SYMBOL(rdma_set_reuseaddr); 2094 2095static void cma_bind_port(struct rdma_bind_list *bind_list, 2096 struct rdma_id_private *id_priv) 2097{ 2098 struct sockaddr_in *sin; 2099 2100 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; 2101 sin->sin_port = htons(bind_list->port); 2102 id_priv->bind_list = bind_list; 2103 hlist_add_head(&id_priv->node, &bind_list->owners); 2104} 2105 2106static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv, 2107 unsigned short snum) 2108{ 2109 struct rdma_bind_list *bind_list; 2110 int port, ret; 2111 2112 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL); 2113 if (!bind_list) 2114 return -ENOMEM; 2115 2116 do { 2117 ret = idr_get_new_above(ps, bind_list, snum, &port); 2118 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL)); 2119 2120 if (ret) 2121 goto err1; 2122 2123 if (port != snum) { 2124 ret = -EADDRNOTAVAIL; 2125 goto err2; 2126 } 2127 2128 bind_list->ps = ps; 2129 bind_list->port = (unsigned short) port; 2130 cma_bind_port(bind_list, id_priv); 2131 return 0; 2132err2: 2133 idr_remove(ps, port); 2134err1: 2135 kfree(bind_list); 2136 return ret; 2137} 2138 2139static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv) 2140{ 2141 static unsigned int last_used_port; 2142 int low, high, remaining; 2143 unsigned int rover; 2144 2145 inet_get_local_port_range(&low, &high); 2146 remaining = (high - low) + 1; 2147 rover = net_random() % remaining + low; 2148retry: 2149 if (last_used_port != rover && 2150 !idr_find(ps, (unsigned short) rover)) { 2151 int ret = cma_alloc_port(ps, id_priv, rover); 2152 /* 2153 * Remember previously used port number in order to avoid 2154 * re-using same port immediately after it is closed. 2155 */ 2156 if (!ret) 2157 last_used_port = rover; 2158 if (ret != -EADDRNOTAVAIL) 2159 return ret; 2160 } 2161 if (--remaining) { 2162 rover++; 2163 if ((rover < low) || (rover > high)) 2164 rover = low; 2165 goto retry; 2166 } 2167 return -EADDRNOTAVAIL; 2168} 2169 2170/* 2171 * Check that the requested port is available. This is called when trying to 2172 * bind to a specific port, or when trying to listen on a bound port. In 2173 * the latter case, the provided id_priv may already be on the bind_list, but 2174 * we still need to check that it's okay to start listening. 2175 */ 2176static int cma_check_port(struct rdma_bind_list *bind_list, 2177 struct rdma_id_private *id_priv, uint8_t reuseaddr) 2178{ 2179 struct rdma_id_private *cur_id; 2180 struct sockaddr *addr, *cur_addr; 2181 struct hlist_node *node; 2182 2183 addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr; 2184 if (cma_any_addr(addr) && !reuseaddr) 2185 return -EADDRNOTAVAIL; 2186 2187 hlist_for_each_entry(cur_id, node, &bind_list->owners, node) { 2188 if (id_priv == cur_id) 2189 continue; 2190 2191 if ((cur_id->state == RDMA_CM_LISTEN) || 2192 !reuseaddr || !cur_id->reuseaddr) { 2193 cur_addr = (struct sockaddr *) &cur_id->id.route.addr.src_addr; 2194 if (cma_any_addr(cur_addr)) 2195 return -EADDRNOTAVAIL; 2196 2197 if (!cma_addr_cmp(addr, cur_addr)) 2198 return -EADDRINUSE; 2199 } 2200 } 2201 return 0; 2202} 2203 2204static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv) 2205{ 2206 struct rdma_bind_list *bind_list; 2207 unsigned short snum; 2208 int ret; 2209 2210 snum = ntohs(cma_port((struct sockaddr *) &id_priv->id.route.addr.src_addr)); 2211 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE)) 2212 return -EACCES; 2213 2214 bind_list = idr_find(ps, snum); 2215 if (!bind_list) { 2216 ret = cma_alloc_port(ps, id_priv, snum); 2217 } else { 2218 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr); 2219 if (!ret) 2220 cma_bind_port(bind_list, id_priv); 2221 } 2222 return ret; 2223} 2224 2225static int cma_bind_listen(struct rdma_id_private *id_priv) 2226{ 2227 struct rdma_bind_list *bind_list = id_priv->bind_list; 2228 int ret = 0; 2229 2230 mutex_lock(&lock); 2231 if (bind_list->owners.first->next) 2232 ret = cma_check_port(bind_list, id_priv, 0); 2233 mutex_unlock(&lock); 2234 return ret; 2235} 2236 2237static int cma_get_port(struct rdma_id_private *id_priv) 2238{ 2239 struct idr *ps; 2240 int ret; 2241 2242 switch (id_priv->id.ps) { 2243 case RDMA_PS_SDP: 2244 ps = &sdp_ps; 2245 break; 2246 case RDMA_PS_TCP: 2247 ps = &tcp_ps; 2248 break; 2249 case RDMA_PS_UDP: 2250 ps = &udp_ps; 2251 break; 2252 case RDMA_PS_IPOIB: 2253 ps = &ipoib_ps; 2254 break; 2255 case RDMA_PS_IB: 2256 ps = &ib_ps; 2257 break; 2258 default: 2259 return -EPROTONOSUPPORT; 2260 } 2261 2262 mutex_lock(&lock); 2263 if (cma_any_port((struct sockaddr *) &id_priv->id.route.addr.src_addr)) 2264 ret = cma_alloc_any_port(ps, id_priv); 2265 else 2266 ret = cma_use_port(ps, id_priv); 2267 mutex_unlock(&lock); 2268 2269 return ret; 2270} 2271 2272static int cma_check_linklocal(struct rdma_dev_addr *dev_addr, 2273 struct sockaddr *addr) 2274{ 2275#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 2276 struct sockaddr_in6 *sin6; 2277 2278 if (addr->sa_family != AF_INET6) 2279 return 0; 2280 2281 sin6 = (struct sockaddr_in6 *) addr; 2282 if ((ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) && 2283 !sin6->sin6_scope_id) 2284 return -EINVAL; 2285 2286 dev_addr->bound_dev_if = sin6->sin6_scope_id; 2287#endif 2288 return 0; 2289} 2290 2291int rdma_listen(struct rdma_cm_id *id, int backlog) 2292{ 2293 struct rdma_id_private *id_priv; 2294 int ret; 2295 2296 id_priv = container_of(id, struct rdma_id_private, id); 2297 if (id_priv->state == RDMA_CM_IDLE) { 2298 ((struct sockaddr *) &id->route.addr.src_addr)->sa_family = AF_INET; 2299 ret = rdma_bind_addr(id, (struct sockaddr *) &id->route.addr.src_addr); 2300 if (ret) 2301 return ret; 2302 } 2303 2304 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN)) 2305 return -EINVAL; 2306 2307 if (id_priv->reuseaddr) { 2308 ret = cma_bind_listen(id_priv); 2309 if (ret) 2310 goto err; 2311 } 2312 2313 id_priv->backlog = backlog; 2314 if (id->device) { 2315 switch (rdma_node_get_transport(id->device->node_type)) { 2316 case RDMA_TRANSPORT_IB: 2317 ret = cma_ib_listen(id_priv); 2318 if (ret) 2319 goto err; 2320 break; 2321 case RDMA_TRANSPORT_IWARP: 2322 ret = cma_iw_listen(id_priv, backlog); 2323 if (ret) 2324 goto err; 2325 break; 2326 default: 2327 ret = -ENOSYS; 2328 goto err; 2329 } 2330 } else 2331 cma_listen_on_all(id_priv); 2332 2333 return 0; 2334err: 2335 id_priv->backlog = 0; 2336 cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND); 2337 return ret; 2338} 2339EXPORT_SYMBOL(rdma_listen); 2340 2341int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr) 2342{ 2343 struct rdma_id_private *id_priv; 2344 int ret; 2345 2346 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6) 2347 return -EAFNOSUPPORT; 2348 2349 id_priv = container_of(id, struct rdma_id_private, id); 2350 if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND)) 2351 return -EINVAL; 2352 2353 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr); 2354 if (ret) 2355 goto err1; 2356 2357 if (!cma_any_addr(addr)) { 2358 ret = rdma_translate_ip(addr, &id->route.addr.dev_addr); 2359 if (ret) 2360 goto err1; 2361 2362 ret = cma_acquire_dev(id_priv); 2363 if (ret) 2364 goto err1; 2365 } 2366 2367 memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr)); 2368 ret = cma_get_port(id_priv); 2369 if (ret) 2370 goto err2; 2371 2372 return 0; 2373err2: 2374 if (id_priv->cma_dev) 2375 cma_release_dev(id_priv); 2376err1: 2377 cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE); 2378 return ret; 2379} 2380EXPORT_SYMBOL(rdma_bind_addr); 2381 2382static int cma_format_hdr(void *hdr, enum rdma_port_space ps, 2383 struct rdma_route *route) 2384{ 2385 struct cma_hdr *cma_hdr; 2386 struct sdp_hh *sdp_hdr; 2387 2388 if (route->addr.src_addr.ss_family == AF_INET) { 2389 struct sockaddr_in *src4, *dst4; 2390 2391 src4 = (struct sockaddr_in *) &route->addr.src_addr; 2392 dst4 = (struct sockaddr_in *) &route->addr.dst_addr; 2393 2394 switch (ps) { 2395 case RDMA_PS_SDP: 2396 sdp_hdr = hdr; 2397 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION) 2398 return -EINVAL; 2399 sdp_set_ip_ver(sdp_hdr, 4); 2400 sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; 2401 sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; 2402 sdp_hdr->port = src4->sin_port; 2403 break; 2404 default: 2405 cma_hdr = hdr; 2406 cma_hdr->cma_version = CMA_VERSION; 2407 cma_set_ip_ver(cma_hdr, 4); 2408 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; 2409 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; 2410 cma_hdr->port = src4->sin_port; 2411 break; 2412 } 2413 } else { 2414 struct sockaddr_in6 *src6, *dst6; 2415 2416 src6 = (struct sockaddr_in6 *) &route->addr.src_addr; 2417 dst6 = (struct sockaddr_in6 *) &route->addr.dst_addr; 2418 2419 switch (ps) { 2420 case RDMA_PS_SDP: 2421 sdp_hdr = hdr; 2422 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION) 2423 return -EINVAL; 2424 sdp_set_ip_ver(sdp_hdr, 6); 2425 sdp_hdr->src_addr.ip6 = src6->sin6_addr; 2426 sdp_hdr->dst_addr.ip6 = dst6->sin6_addr; 2427 sdp_hdr->port = src6->sin6_port; 2428 break; 2429 default: 2430 cma_hdr = hdr; 2431 cma_hdr->cma_version = CMA_VERSION; 2432 cma_set_ip_ver(cma_hdr, 6); 2433 cma_hdr->src_addr.ip6 = src6->sin6_addr; 2434 cma_hdr->dst_addr.ip6 = dst6->sin6_addr; 2435 cma_hdr->port = src6->sin6_port; 2436 break; 2437 } 2438 } 2439 return 0; 2440} 2441 2442static int cma_sidr_rep_handler(struct ib_cm_id *cm_id, 2443 struct ib_cm_event *ib_event) 2444{ 2445 struct rdma_id_private *id_priv = cm_id->context; 2446 struct rdma_cm_event event; 2447 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd; 2448 int ret = 0; 2449 2450 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT)) 2451 return 0; 2452 2453 memset(&event, 0, sizeof event); 2454 switch (ib_event->event) { 2455 case IB_CM_SIDR_REQ_ERROR: 2456 event.event = RDMA_CM_EVENT_UNREACHABLE; 2457 event.status = -ETIMEDOUT; 2458 break; 2459 case IB_CM_SIDR_REP_RECEIVED: 2460 event.param.ud.private_data = ib_event->private_data; 2461 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE; 2462 if (rep->status != IB_SIDR_SUCCESS) { 2463 event.event = RDMA_CM_EVENT_UNREACHABLE; 2464 event.status = ib_event->param.sidr_rep_rcvd.status; 2465 break; 2466 } 2467 ret = cma_set_qkey(id_priv); 2468 if (ret) { 2469 event.event = RDMA_CM_EVENT_ADDR_ERROR; 2470 event.status = -EINVAL; 2471 break; 2472 } 2473 if (id_priv->qkey != rep->qkey) { 2474 event.event = RDMA_CM_EVENT_UNREACHABLE; 2475 event.status = -EINVAL; 2476 break; 2477 } 2478 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num, 2479 id_priv->id.route.path_rec, 2480 &event.param.ud.ah_attr); 2481 event.param.ud.qp_num = rep->qpn; 2482 event.param.ud.qkey = rep->qkey; 2483 event.event = RDMA_CM_EVENT_ESTABLISHED; 2484 event.status = 0; 2485 break; 2486 default: 2487 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n", 2488 ib_event->event); 2489 goto out; 2490 } 2491 2492 ret = id_priv->id.event_handler(&id_priv->id, &event); 2493 if (ret) { 2494 /* Destroy the CM ID by returning a non-zero value. */ 2495 id_priv->cm_id.ib = NULL; 2496 cma_exch(id_priv, RDMA_CM_DESTROYING); 2497 mutex_unlock(&id_priv->handler_mutex); 2498 rdma_destroy_id(&id_priv->id); 2499 return ret; 2500 } 2501out: 2502 mutex_unlock(&id_priv->handler_mutex); 2503 return ret; 2504} 2505 2506static int cma_resolve_ib_udp(struct rdma_id_private *id_priv, 2507 struct rdma_conn_param *conn_param) 2508{ 2509 struct ib_cm_sidr_req_param req; 2510 struct rdma_route *route; 2511 struct ib_cm_id *id; 2512 int ret; 2513 2514 req.private_data_len = sizeof(struct cma_hdr) + 2515 conn_param->private_data_len; 2516 if (req.private_data_len < conn_param->private_data_len) 2517 return -EINVAL; 2518 2519 req.private_data = kzalloc(req.private_data_len, GFP_ATOMIC); 2520 if (!req.private_data) 2521 return -ENOMEM; 2522 2523 if (conn_param->private_data && conn_param->private_data_len) 2524 memcpy((void *) req.private_data + sizeof(struct cma_hdr), 2525 conn_param->private_data, conn_param->private_data_len); 2526 2527 route = &id_priv->id.route; 2528 ret = cma_format_hdr((void *) req.private_data, id_priv->id.ps, route); 2529 if (ret) 2530 goto out; 2531 2532 id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler, 2533 id_priv); 2534 if (IS_ERR(id)) { 2535 ret = PTR_ERR(id); 2536 goto out; 2537 } 2538 id_priv->cm_id.ib = id; 2539 2540 req.path = route->path_rec; 2541 req.service_id = cma_get_service_id(id_priv->id.ps, 2542 (struct sockaddr *) &route->addr.dst_addr); 2543 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8); 2544 req.max_cm_retries = CMA_MAX_CM_RETRIES; 2545 2546 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req); 2547 if (ret) { 2548 ib_destroy_cm_id(id_priv->cm_id.ib); 2549 id_priv->cm_id.ib = NULL; 2550 } 2551out: 2552 kfree(req.private_data); 2553 return ret; 2554} 2555 2556static int cma_connect_ib(struct rdma_id_private *id_priv, 2557 struct rdma_conn_param *conn_param) 2558{ 2559 struct ib_cm_req_param req; 2560 struct rdma_route *route; 2561 void *private_data; 2562 struct ib_cm_id *id; 2563 int offset, ret; 2564 2565 memset(&req, 0, sizeof req); 2566 offset = cma_user_data_offset(id_priv->id.ps); 2567 req.private_data_len = offset + conn_param->private_data_len; 2568 if (req.private_data_len < conn_param->private_data_len) 2569 return -EINVAL; 2570 2571 private_data = kzalloc(req.private_data_len, GFP_ATOMIC); 2572 if (!private_data) 2573 return -ENOMEM; 2574 2575 if (conn_param->private_data && conn_param->private_data_len) 2576 memcpy(private_data + offset, conn_param->private_data, 2577 conn_param->private_data_len); 2578 2579 id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv); 2580 if (IS_ERR(id)) { 2581 ret = PTR_ERR(id); 2582 goto out; 2583 } 2584 id_priv->cm_id.ib = id; 2585 2586 route = &id_priv->id.route; 2587 ret = cma_format_hdr(private_data, id_priv->id.ps, route); 2588 if (ret) 2589 goto out; 2590 req.private_data = private_data; 2591 2592 req.primary_path = &route->path_rec[0]; 2593 if (route->num_paths == 2) 2594 req.alternate_path = &route->path_rec[1]; 2595 2596 req.service_id = cma_get_service_id(id_priv->id.ps, 2597 (struct sockaddr *) &route->addr.dst_addr); 2598 req.qp_num = id_priv->qp_num; 2599 req.qp_type = id_priv->id.qp_type; 2600 req.starting_psn = id_priv->seq_num; 2601 req.responder_resources = conn_param->responder_resources; 2602 req.initiator_depth = conn_param->initiator_depth; 2603 req.flow_control = conn_param->flow_control; 2604 req.retry_count = conn_param->retry_count; 2605 req.rnr_retry_count = conn_param->rnr_retry_count; 2606 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; 2607 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; 2608 req.max_cm_retries = CMA_MAX_CM_RETRIES; 2609 req.srq = id_priv->srq ? 1 : 0; 2610 2611 ret = ib_send_cm_req(id_priv->cm_id.ib, &req); 2612out: 2613 if (ret && !IS_ERR(id)) { 2614 ib_destroy_cm_id(id); 2615 id_priv->cm_id.ib = NULL; 2616 } 2617 2618 kfree(private_data); 2619 return ret; 2620} 2621 2622static int cma_connect_iw(struct rdma_id_private *id_priv, 2623 struct rdma_conn_param *conn_param) 2624{ 2625 struct iw_cm_id *cm_id; 2626 struct sockaddr_in* sin; 2627 int ret; 2628 struct iw_cm_conn_param iw_param; 2629 2630 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv); 2631 if (IS_ERR(cm_id)) 2632 return PTR_ERR(cm_id); 2633 2634 id_priv->cm_id.iw = cm_id; 2635 2636 sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr; 2637 cm_id->local_addr = *sin; 2638 2639 sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr; 2640 cm_id->remote_addr = *sin; 2641 2642 ret = cma_modify_qp_rtr(id_priv, conn_param); 2643 if (ret) 2644 goto out; 2645 2646 if (conn_param) { 2647 iw_param.ord = conn_param->initiator_depth; 2648 iw_param.ird = conn_param->responder_resources; 2649 iw_param.private_data = conn_param->private_data; 2650 iw_param.private_data_len = conn_param->private_data_len; 2651 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num; 2652 } else { 2653 memset(&iw_param, 0, sizeof iw_param); 2654 iw_param.qpn = id_priv->qp_num; 2655 } 2656 ret = iw_cm_connect(cm_id, &iw_param); 2657out: 2658 if (ret) { 2659 iw_destroy_cm_id(cm_id); 2660 id_priv->cm_id.iw = NULL; 2661 } 2662 return ret; 2663} 2664 2665int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) 2666{ 2667 struct rdma_id_private *id_priv; 2668 int ret; 2669 2670 id_priv = container_of(id, struct rdma_id_private, id); 2671 if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT)) 2672 return -EINVAL; 2673 2674 if (!id->qp) { 2675 id_priv->qp_num = conn_param->qp_num; 2676 id_priv->srq = conn_param->srq; 2677 } 2678 2679 switch (rdma_node_get_transport(id->device->node_type)) { 2680 case RDMA_TRANSPORT_IB: 2681 if (id->qp_type == IB_QPT_UD) 2682 ret = cma_resolve_ib_udp(id_priv, conn_param); 2683 else 2684 ret = cma_connect_ib(id_priv, conn_param); 2685 break; 2686 case RDMA_TRANSPORT_IWARP: 2687 ret = cma_connect_iw(id_priv, conn_param); 2688 break; 2689 default: 2690 ret = -ENOSYS; 2691 break; 2692 } 2693 if (ret) 2694 goto err; 2695 2696 return 0; 2697err: 2698 cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED); 2699 return ret; 2700} 2701EXPORT_SYMBOL(rdma_connect); 2702 2703static int cma_accept_ib(struct rdma_id_private *id_priv, 2704 struct rdma_conn_param *conn_param) 2705{ 2706 struct ib_cm_rep_param rep; 2707 int ret; 2708 2709 ret = cma_modify_qp_rtr(id_priv, conn_param); 2710 if (ret) 2711 goto out; 2712 2713 ret = cma_modify_qp_rts(id_priv, conn_param); 2714 if (ret) 2715 goto out; 2716 2717 memset(&rep, 0, sizeof rep); 2718 rep.qp_num = id_priv->qp_num; 2719 rep.starting_psn = id_priv->seq_num; 2720 rep.private_data = conn_param->private_data; 2721 rep.private_data_len = conn_param->private_data_len; 2722 rep.responder_resources = conn_param->responder_resources; 2723 rep.initiator_depth = conn_param->initiator_depth; 2724 rep.failover_accepted = 0; 2725 rep.flow_control = conn_param->flow_control; 2726 rep.rnr_retry_count = conn_param->rnr_retry_count; 2727 rep.srq = id_priv->srq ? 1 : 0; 2728 2729 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep); 2730out: 2731 return ret; 2732} 2733 2734static int cma_accept_iw(struct rdma_id_private *id_priv, 2735 struct rdma_conn_param *conn_param) 2736{ 2737 struct iw_cm_conn_param iw_param; 2738 int ret; 2739 2740 ret = cma_modify_qp_rtr(id_priv, conn_param); 2741 if (ret) 2742 return ret; 2743 2744 iw_param.ord = conn_param->initiator_depth; 2745 iw_param.ird = conn_param->responder_resources; 2746 iw_param.private_data = conn_param->private_data; 2747 iw_param.private_data_len = conn_param->private_data_len; 2748 if (id_priv->id.qp) { 2749 iw_param.qpn = id_priv->qp_num; 2750 } else 2751 iw_param.qpn = conn_param->qp_num; 2752 2753 return iw_cm_accept(id_priv->cm_id.iw, &iw_param); 2754} 2755 2756static int cma_send_sidr_rep(struct rdma_id_private *id_priv, 2757 enum ib_cm_sidr_status status, 2758 const void *private_data, int private_data_len) 2759{ 2760 struct ib_cm_sidr_rep_param rep; 2761 int ret; 2762 2763 memset(&rep, 0, sizeof rep); 2764 rep.status = status; 2765 if (status == IB_SIDR_SUCCESS) { 2766 ret = cma_set_qkey(id_priv); 2767 if (ret) 2768 return ret; 2769 rep.qp_num = id_priv->qp_num; 2770 rep.qkey = id_priv->qkey; 2771 } 2772 rep.private_data = private_data; 2773 rep.private_data_len = private_data_len; 2774 2775 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep); 2776} 2777 2778int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) 2779{ 2780 struct rdma_id_private *id_priv; 2781 int ret; 2782 2783 id_priv = container_of(id, struct rdma_id_private, id); 2784 2785 id_priv->owner = task_pid_nr(current); 2786 2787 if (!cma_comp(id_priv, RDMA_CM_CONNECT)) 2788 return -EINVAL; 2789 2790 if (!id->qp && conn_param) { 2791 id_priv->qp_num = conn_param->qp_num; 2792 id_priv->srq = conn_param->srq; 2793 } 2794 2795 switch (rdma_node_get_transport(id->device->node_type)) { 2796 case RDMA_TRANSPORT_IB: 2797 if (id->qp_type == IB_QPT_UD) { 2798 if (conn_param) 2799 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS, 2800 conn_param->private_data, 2801 conn_param->private_data_len); 2802 else 2803 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS, 2804 NULL, 0); 2805 } else { 2806 if (conn_param) 2807 ret = cma_accept_ib(id_priv, conn_param); 2808 else 2809 ret = cma_rep_recv(id_priv); 2810 } 2811 break; 2812 case RDMA_TRANSPORT_IWARP: 2813 ret = cma_accept_iw(id_priv, conn_param); 2814 break; 2815 default: 2816 ret = -ENOSYS; 2817 break; 2818 } 2819 2820 if (ret) 2821 goto reject; 2822 2823 return 0; 2824reject: 2825 cma_modify_qp_err(id_priv); 2826 rdma_reject(id, NULL, 0); 2827 return ret; 2828} 2829EXPORT_SYMBOL(rdma_accept); 2830 2831int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event) 2832{ 2833 struct rdma_id_private *id_priv; 2834 int ret; 2835 2836 id_priv = container_of(id, struct rdma_id_private, id); 2837 if (!id_priv->cm_id.ib) 2838 return -EINVAL; 2839 2840 switch (id->device->node_type) { 2841 case RDMA_NODE_IB_CA: 2842 ret = ib_cm_notify(id_priv->cm_id.ib, event); 2843 break; 2844 default: 2845 ret = 0; 2846 break; 2847 } 2848 return ret; 2849} 2850EXPORT_SYMBOL(rdma_notify); 2851 2852int rdma_reject(struct rdma_cm_id *id, const void *private_data, 2853 u8 private_data_len) 2854{ 2855 struct rdma_id_private *id_priv; 2856 int ret; 2857 2858 id_priv = container_of(id, struct rdma_id_private, id); 2859 if (!id_priv->cm_id.ib) 2860 return -EINVAL; 2861 2862 switch (rdma_node_get_transport(id->device->node_type)) { 2863 case RDMA_TRANSPORT_IB: 2864 if (id->qp_type == IB_QPT_UD) 2865 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 2866 private_data, private_data_len); 2867 else 2868 ret = ib_send_cm_rej(id_priv->cm_id.ib, 2869 IB_CM_REJ_CONSUMER_DEFINED, NULL, 2870 0, private_data, private_data_len); 2871 break; 2872 case RDMA_TRANSPORT_IWARP: 2873 ret = iw_cm_reject(id_priv->cm_id.iw, 2874 private_data, private_data_len); 2875 break; 2876 default: 2877 ret = -ENOSYS; 2878 break; 2879 } 2880 return ret; 2881} 2882EXPORT_SYMBOL(rdma_reject); 2883 2884int rdma_disconnect(struct rdma_cm_id *id) 2885{ 2886 struct rdma_id_private *id_priv; 2887 int ret; 2888 2889 id_priv = container_of(id, struct rdma_id_private, id); 2890 if (!id_priv->cm_id.ib) 2891 return -EINVAL; 2892 2893 switch (rdma_node_get_transport(id->device->node_type)) { 2894 case RDMA_TRANSPORT_IB: 2895 ret = cma_modify_qp_err(id_priv); 2896 if (ret) 2897 goto out; 2898 /* Initiate or respond to a disconnect. */ 2899 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0)) 2900 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0); 2901 break; 2902 case RDMA_TRANSPORT_IWARP: 2903 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0); 2904 break; 2905 default: 2906 ret = -EINVAL; 2907 break; 2908 } 2909out: 2910 return ret; 2911} 2912EXPORT_SYMBOL(rdma_disconnect); 2913 2914static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast) 2915{ 2916 struct rdma_id_private *id_priv; 2917 struct cma_multicast *mc = multicast->context; 2918 struct rdma_cm_event event; 2919 int ret; 2920 2921 id_priv = mc->id_priv; 2922 if (cma_disable_callback(id_priv, RDMA_CM_ADDR_BOUND) && 2923 cma_disable_callback(id_priv, RDMA_CM_ADDR_RESOLVED)) 2924 return 0; 2925 2926 mutex_lock(&id_priv->qp_mutex); 2927 if (!status && id_priv->id.qp) 2928 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid, 2929 be16_to_cpu(multicast->rec.mlid)); 2930 mutex_unlock(&id_priv->qp_mutex); 2931 2932 memset(&event, 0, sizeof event); 2933 event.status = status; 2934 event.param.ud.private_data = mc->context; 2935 if (!status) { 2936 event.event = RDMA_CM_EVENT_MULTICAST_JOIN; 2937 ib_init_ah_from_mcmember(id_priv->id.device, 2938 id_priv->id.port_num, &multicast->rec, 2939 &event.param.ud.ah_attr); 2940 event.param.ud.qp_num = 0xFFFFFF; 2941 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey); 2942 } else 2943 event.event = RDMA_CM_EVENT_MULTICAST_ERROR; 2944 2945 ret = id_priv->id.event_handler(&id_priv->id, &event); 2946 if (ret) { 2947 cma_exch(id_priv, RDMA_CM_DESTROYING); 2948 mutex_unlock(&id_priv->handler_mutex); 2949 rdma_destroy_id(&id_priv->id); 2950 return 0; 2951 } 2952 2953 mutex_unlock(&id_priv->handler_mutex); 2954 return 0; 2955} 2956 2957static void cma_set_mgid(struct rdma_id_private *id_priv, 2958 struct sockaddr *addr, union ib_gid *mgid) 2959{ 2960 unsigned char mc_map[MAX_ADDR_LEN]; 2961 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 2962 struct sockaddr_in *sin = (struct sockaddr_in *) addr; 2963 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr; 2964 2965 if (cma_any_addr(addr)) { 2966 memset(mgid, 0, sizeof *mgid); 2967 } else if ((addr->sa_family == AF_INET6) && 2968 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) == 2969 0xFF10A01B)) { 2970 /* IPv6 address is an SA assigned MGID. */ 2971 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid); 2972 } else if ((addr->sa_family == AF_INET6)) { 2973 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map); 2974 if (id_priv->id.ps == RDMA_PS_UDP) 2975 mc_map[7] = 0x01; /* Use RDMA CM signature */ 2976 *mgid = *(union ib_gid *) (mc_map + 4); 2977 } else { 2978 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map); 2979 if (id_priv->id.ps == RDMA_PS_UDP) 2980 mc_map[7] = 0x01; /* Use RDMA CM signature */ 2981 *mgid = *(union ib_gid *) (mc_map + 4); 2982 } 2983} 2984 2985static int cma_join_ib_multicast(struct rdma_id_private *id_priv, 2986 struct cma_multicast *mc) 2987{ 2988 struct ib_sa_mcmember_rec rec; 2989 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 2990 ib_sa_comp_mask comp_mask; 2991 int ret; 2992 2993 ib_addr_get_mgid(dev_addr, &rec.mgid); 2994 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num, 2995 &rec.mgid, &rec); 2996 if (ret) 2997 return ret; 2998 2999 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid); 3000 if (id_priv->id.ps == RDMA_PS_UDP) 3001 rec.qkey = cpu_to_be32(RDMA_UDP_QKEY); 3002 rdma_addr_get_sgid(dev_addr, &rec.port_gid); 3003 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); 3004 rec.join_state = 1; 3005 3006 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID | 3007 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE | 3008 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL | 3009 IB_SA_MCMEMBER_REC_FLOW_LABEL | 3010 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS; 3011 3012 if (id_priv->id.ps == RDMA_PS_IPOIB) 3013 comp_mask |= IB_SA_MCMEMBER_REC_RATE | 3014 IB_SA_MCMEMBER_REC_RATE_SELECTOR; 3015 3016 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device, 3017 id_priv->id.port_num, &rec, 3018 comp_mask, GFP_KERNEL, 3019 cma_ib_mc_handler, mc); 3020 if (IS_ERR(mc->multicast.ib)) 3021 return PTR_ERR(mc->multicast.ib); 3022 3023 return 0; 3024} 3025 3026static void iboe_mcast_work_handler(struct work_struct *work) 3027{ 3028 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work); 3029 struct cma_multicast *mc = mw->mc; 3030 struct ib_sa_multicast *m = mc->multicast.ib; 3031 3032 mc->multicast.ib->context = mc; 3033 cma_ib_mc_handler(0, m); 3034 kref_put(&mc->mcref, release_mc); 3035 kfree(mw); 3036} 3037 3038static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid) 3039{ 3040 struct sockaddr_in *sin = (struct sockaddr_in *)addr; 3041 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr; 3042 3043 if (cma_any_addr(addr)) { 3044 memset(mgid, 0, sizeof *mgid); 3045 } else if (addr->sa_family == AF_INET6) { 3046 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid); 3047 } else { 3048 mgid->raw[0] = 0xff; 3049 mgid->raw[1] = 0x0e; 3050 mgid->raw[2] = 0; 3051 mgid->raw[3] = 0; 3052 mgid->raw[4] = 0; 3053 mgid->raw[5] = 0; 3054 mgid->raw[6] = 0; 3055 mgid->raw[7] = 0; 3056 mgid->raw[8] = 0; 3057 mgid->raw[9] = 0; 3058 mgid->raw[10] = 0xff; 3059 mgid->raw[11] = 0xff; 3060 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr; 3061 } 3062} 3063 3064static int cma_iboe_join_multicast(struct rdma_id_private *id_priv, 3065 struct cma_multicast *mc) 3066{ 3067 struct iboe_mcast_work *work; 3068 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 3069 int err; 3070 struct sockaddr *addr = (struct sockaddr *)&mc->addr; 3071 struct net_device *ndev = NULL; 3072 3073 if (cma_zero_addr((struct sockaddr *)&mc->addr)) 3074 return -EINVAL; 3075 3076 work = kzalloc(sizeof *work, GFP_KERNEL); 3077 if (!work) 3078 return -ENOMEM; 3079 3080 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL); 3081 if (!mc->multicast.ib) { 3082 err = -ENOMEM; 3083 goto out1; 3084 } 3085 3086 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid); 3087 3088 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff); 3089 if (id_priv->id.ps == RDMA_PS_UDP) 3090 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY); 3091 3092 if (dev_addr->bound_dev_if) 3093 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if); 3094 if (!ndev) { 3095 err = -ENODEV; 3096 goto out2; 3097 } 3098 mc->multicast.ib->rec.rate = iboe_get_rate(ndev); 3099 mc->multicast.ib->rec.hop_limit = 1; 3100 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu); 3101 dev_put(ndev); 3102 if (!mc->multicast.ib->rec.mtu) { 3103 err = -EINVAL; 3104 goto out2; 3105 } 3106 iboe_addr_get_sgid(dev_addr, &mc->multicast.ib->rec.port_gid); 3107 work->id = id_priv; 3108 work->mc = mc; 3109 INIT_WORK(&work->work, iboe_mcast_work_handler); 3110 kref_get(&mc->mcref); 3111 queue_work(cma_wq, &work->work); 3112 3113 return 0; 3114 3115out2: 3116 kfree(mc->multicast.ib); 3117out1: 3118 kfree(work); 3119 return err; 3120} 3121 3122int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr, 3123 void *context) 3124{ 3125 struct rdma_id_private *id_priv; 3126 struct cma_multicast *mc; 3127 int ret; 3128 3129 id_priv = container_of(id, struct rdma_id_private, id); 3130 if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) && 3131 !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED)) 3132 return -EINVAL; 3133 3134 mc = kmalloc(sizeof *mc, GFP_KERNEL); 3135 if (!mc) 3136 return -ENOMEM; 3137 3138 memcpy(&mc->addr, addr, ip_addr_size(addr)); 3139 mc->context = context; 3140 mc->id_priv = id_priv; 3141 3142 spin_lock(&id_priv->lock); 3143 list_add(&mc->list, &id_priv->mc_list); 3144 spin_unlock(&id_priv->lock); 3145 3146 switch (rdma_node_get_transport(id->device->node_type)) { 3147 case RDMA_TRANSPORT_IB: 3148 switch (rdma_port_get_link_layer(id->device, id->port_num)) { 3149 case IB_LINK_LAYER_INFINIBAND: 3150 ret = cma_join_ib_multicast(id_priv, mc); 3151 break; 3152 case IB_LINK_LAYER_ETHERNET: 3153 kref_init(&mc->mcref); 3154 ret = cma_iboe_join_multicast(id_priv, mc); 3155 break; 3156 default: 3157 ret = -EINVAL; 3158 } 3159 break; 3160 default: 3161 ret = -ENOSYS; 3162 break; 3163 } 3164 3165 if (ret) { 3166 spin_lock_irq(&id_priv->lock); 3167 list_del(&mc->list); 3168 spin_unlock_irq(&id_priv->lock); 3169 kfree(mc); 3170 } 3171 return ret; 3172} 3173EXPORT_SYMBOL(rdma_join_multicast); 3174 3175void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr) 3176{ 3177 struct rdma_id_private *id_priv; 3178 struct cma_multicast *mc; 3179 3180 id_priv = container_of(id, struct rdma_id_private, id); 3181 spin_lock_irq(&id_priv->lock); 3182 list_for_each_entry(mc, &id_priv->mc_list, list) { 3183 if (!memcmp(&mc->addr, addr, ip_addr_size(addr))) { 3184 list_del(&mc->list); 3185 spin_unlock_irq(&id_priv->lock); 3186 3187 if (id->qp) 3188 ib_detach_mcast(id->qp, 3189 &mc->multicast.ib->rec.mgid, 3190 be16_to_cpu(mc->multicast.ib->rec.mlid)); 3191 if (rdma_node_get_transport(id_priv->cma_dev->device->node_type) == RDMA_TRANSPORT_IB) { 3192 switch (rdma_port_get_link_layer(id->device, id->port_num)) { 3193 case IB_LINK_LAYER_INFINIBAND: 3194 ib_sa_free_multicast(mc->multicast.ib); 3195 kfree(mc); 3196 break; 3197 case IB_LINK_LAYER_ETHERNET: 3198 kref_put(&mc->mcref, release_mc); 3199 break; 3200 default: 3201 break; 3202 } 3203 } 3204 return; 3205 } 3206 } 3207 spin_unlock_irq(&id_priv->lock); 3208} 3209EXPORT_SYMBOL(rdma_leave_multicast); 3210 3211static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv) 3212{ 3213 struct rdma_dev_addr *dev_addr; 3214 struct cma_ndev_work *work; 3215 3216 dev_addr = &id_priv->id.route.addr.dev_addr; 3217 3218 if ((dev_addr->bound_dev_if == ndev->ifindex) && 3219 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) { 3220 printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n", 3221 ndev->name, &id_priv->id); 3222 work = kzalloc(sizeof *work, GFP_KERNEL); 3223 if (!work) 3224 return -ENOMEM; 3225 3226 INIT_WORK(&work->work, cma_ndev_work_handler); 3227 work->id = id_priv; 3228 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE; 3229 atomic_inc(&id_priv->refcount); 3230 queue_work(cma_wq, &work->work); 3231 } 3232 3233 return 0; 3234} 3235 3236static int cma_netdev_callback(struct notifier_block *self, unsigned long event, 3237 void *ctx) 3238{ 3239 struct net_device *ndev = (struct net_device *)ctx; 3240 struct cma_device *cma_dev; 3241 struct rdma_id_private *id_priv; 3242 int ret = NOTIFY_DONE; 3243 3244 if (dev_net(ndev) != &init_net) 3245 return NOTIFY_DONE; 3246 3247 if (event != NETDEV_BONDING_FAILOVER) 3248 return NOTIFY_DONE; 3249 3250 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING)) 3251 return NOTIFY_DONE; 3252 3253 mutex_lock(&lock); 3254 list_for_each_entry(cma_dev, &dev_list, list) 3255 list_for_each_entry(id_priv, &cma_dev->id_list, list) { 3256 ret = cma_netdev_change(ndev, id_priv); 3257 if (ret) 3258 goto out; 3259 } 3260 3261out: 3262 mutex_unlock(&lock); 3263 return ret; 3264} 3265 3266static struct notifier_block cma_nb = { 3267 .notifier_call = cma_netdev_callback 3268}; 3269 3270static void cma_add_one(struct ib_device *device) 3271{ 3272 struct cma_device *cma_dev; 3273 struct rdma_id_private *id_priv; 3274 3275 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL); 3276 if (!cma_dev) 3277 return; 3278 3279 cma_dev->device = device; 3280 3281 init_completion(&cma_dev->comp); 3282 atomic_set(&cma_dev->refcount, 1); 3283 INIT_LIST_HEAD(&cma_dev->id_list); 3284 ib_set_client_data(device, &cma_client, cma_dev); 3285 3286 mutex_lock(&lock); 3287 list_add_tail(&cma_dev->list, &dev_list); 3288 list_for_each_entry(id_priv, &listen_any_list, list) 3289 cma_listen_on_dev(id_priv, cma_dev); 3290 mutex_unlock(&lock); 3291} 3292 3293static int cma_remove_id_dev(struct rdma_id_private *id_priv) 3294{ 3295 struct rdma_cm_event event; 3296 enum rdma_cm_state state; 3297 int ret = 0; 3298 3299 /* Record that we want to remove the device */ 3300 state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL); 3301 if (state == RDMA_CM_DESTROYING) 3302 return 0; 3303 3304 cma_cancel_operation(id_priv, state); 3305 mutex_lock(&id_priv->handler_mutex); 3306 3307 /* Check for destruction from another callback. */ 3308 if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL)) 3309 goto out; 3310 3311 memset(&event, 0, sizeof event); 3312 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL; 3313 ret = id_priv->id.event_handler(&id_priv->id, &event); 3314out: 3315 mutex_unlock(&id_priv->handler_mutex); 3316 return ret; 3317} 3318 3319static void cma_process_remove(struct cma_device *cma_dev) 3320{ 3321 struct rdma_id_private *id_priv; 3322 int ret; 3323 3324 mutex_lock(&lock); 3325 while (!list_empty(&cma_dev->id_list)) { 3326 id_priv = list_entry(cma_dev->id_list.next, 3327 struct rdma_id_private, list); 3328 3329 list_del(&id_priv->listen_list); 3330 list_del_init(&id_priv->list); 3331 atomic_inc(&id_priv->refcount); 3332 mutex_unlock(&lock); 3333 3334 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv); 3335 cma_deref_id(id_priv); 3336 if (ret) 3337 rdma_destroy_id(&id_priv->id); 3338 3339 mutex_lock(&lock); 3340 } 3341 mutex_unlock(&lock); 3342 3343 cma_deref_dev(cma_dev); 3344 wait_for_completion(&cma_dev->comp); 3345} 3346 3347static void cma_remove_one(struct ib_device *device) 3348{ 3349 struct cma_device *cma_dev; 3350 3351 cma_dev = ib_get_client_data(device, &cma_client); 3352 if (!cma_dev) 3353 return; 3354 3355 mutex_lock(&lock); 3356 list_del(&cma_dev->list); 3357 mutex_unlock(&lock); 3358 3359 cma_process_remove(cma_dev); 3360 kfree(cma_dev); 3361} 3362 3363static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb) 3364{ 3365 struct nlmsghdr *nlh; 3366 struct rdma_cm_id_stats *id_stats; 3367 struct rdma_id_private *id_priv; 3368 struct rdma_cm_id *id = NULL; 3369 struct cma_device *cma_dev; 3370 int i_dev = 0, i_id = 0; 3371 3372 /* 3373 * We export all of the IDs as a sequence of messages. Each 3374 * ID gets its own netlink message. 3375 */ 3376 mutex_lock(&lock); 3377 3378 list_for_each_entry(cma_dev, &dev_list, list) { 3379 if (i_dev < cb->args[0]) { 3380 i_dev++; 3381 continue; 3382 } 3383 3384 i_id = 0; 3385 list_for_each_entry(id_priv, &cma_dev->id_list, list) { 3386 if (i_id < cb->args[1]) { 3387 i_id++; 3388 continue; 3389 } 3390 3391 id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq, 3392 sizeof *id_stats, RDMA_NL_RDMA_CM, 3393 RDMA_NL_RDMA_CM_ID_STATS); 3394 if (!id_stats) 3395 goto out; 3396 3397 memset(id_stats, 0, sizeof *id_stats); 3398 id = &id_priv->id; 3399 id_stats->node_type = id->route.addr.dev_addr.dev_type; 3400 id_stats->port_num = id->port_num; 3401 id_stats->bound_dev_if = 3402 id->route.addr.dev_addr.bound_dev_if; 3403 3404 if (id->route.addr.src_addr.ss_family == AF_INET) { 3405 if (ibnl_put_attr(skb, nlh, 3406 sizeof(struct sockaddr_in), 3407 &id->route.addr.src_addr, 3408 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR)) { 3409 goto out; 3410 } 3411 if (ibnl_put_attr(skb, nlh, 3412 sizeof(struct sockaddr_in), 3413 &id->route.addr.dst_addr, 3414 RDMA_NL_RDMA_CM_ATTR_DST_ADDR)) { 3415 goto out; 3416 } 3417 } else if (id->route.addr.src_addr.ss_family == AF_INET6) { 3418 if (ibnl_put_attr(skb, nlh, 3419 sizeof(struct sockaddr_in6), 3420 &id->route.addr.src_addr, 3421 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR)) { 3422 goto out; 3423 } 3424 if (ibnl_put_attr(skb, nlh, 3425 sizeof(struct sockaddr_in6), 3426 &id->route.addr.dst_addr, 3427 RDMA_NL_RDMA_CM_ATTR_DST_ADDR)) { 3428 goto out; 3429 } 3430 } 3431 3432 id_stats->pid = id_priv->owner; 3433 id_stats->port_space = id->ps; 3434 id_stats->cm_state = id_priv->state; 3435 id_stats->qp_num = id_priv->qp_num; 3436 id_stats->qp_type = id->qp_type; 3437 3438 i_id++; 3439 } 3440 3441 cb->args[1] = 0; 3442 i_dev++; 3443 } 3444 3445out: 3446 mutex_unlock(&lock); 3447 cb->args[0] = i_dev; 3448 cb->args[1] = i_id; 3449 3450 return skb->len; 3451} 3452 3453static const struct ibnl_client_cbs cma_cb_table[] = { 3454 [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats }, 3455}; 3456 3457static int __init cma_init(void) 3458{ 3459 int ret; 3460 3461 cma_wq = create_singlethread_workqueue("rdma_cm"); 3462 if (!cma_wq) 3463 return -ENOMEM; 3464 3465 ib_sa_register_client(&sa_client); 3466 rdma_addr_register_client(&addr_client); 3467 register_netdevice_notifier(&cma_nb); 3468 3469 ret = ib_register_client(&cma_client); 3470 if (ret) 3471 goto err; 3472 3473 if (ibnl_add_client(RDMA_NL_RDMA_CM, RDMA_NL_RDMA_CM_NUM_OPS, cma_cb_table)) 3474 printk(KERN_WARNING "RDMA CMA: failed to add netlink callback\n"); 3475 3476 return 0; 3477 3478err: 3479 unregister_netdevice_notifier(&cma_nb); 3480 rdma_addr_unregister_client(&addr_client); 3481 ib_sa_unregister_client(&sa_client); 3482 destroy_workqueue(cma_wq); 3483 return ret; 3484} 3485 3486static void __exit cma_cleanup(void) 3487{ 3488 ibnl_remove_client(RDMA_NL_RDMA_CM); 3489 ib_unregister_client(&cma_client); 3490 unregister_netdevice_notifier(&cma_nb); 3491 rdma_addr_unregister_client(&addr_client); 3492 ib_sa_unregister_client(&sa_client); 3493 destroy_workqueue(cma_wq); 3494 idr_destroy(&sdp_ps); 3495 idr_destroy(&tcp_ps); 3496 idr_destroy(&udp_ps); 3497 idr_destroy(&ipoib_ps); 3498 idr_destroy(&ib_ps); 3499} 3500 3501module_init(cma_init); 3502module_exit(cma_cleanup); 3503