1 /* 2 * Copyright (c) 2005 Voltaire Inc. All rights reserved. 3 * Copyright (c) 2002-2005, Network Appliance, Inc. All rights reserved. 4 * Copyright (c) 1999-2005, Mellanox Technologies, Inc. All rights reserved. 5 * Copyright (c) 2005-2006 Intel Corporation. All rights reserved. 6 * 7 * This software is available to you under a choice of one of two 8 * licenses. You may choose to be licensed under the terms of the GNU 9 * General Public License (GPL) Version 2, available from the file 10 * COPYING in the main directory of this source tree, or the 11 * OpenIB.org BSD license below: 12 * 13 * Redistribution and use in source and binary forms, with or 14 * without modification, are permitted provided that the following 15 * conditions are met: 16 * 17 * - Redistributions of source code must retain the above 18 * copyright notice, this list of conditions and the following 19 * disclaimer. 20 * 21 * - Redistributions in binary form must reproduce the above 22 * copyright notice, this list of conditions and the following 23 * disclaimer in the documentation and/or other materials 24 * provided with the distribution. 25 * 26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 33 * SOFTWARE. 34 */ 35 36 #include <linux/completion.h> 37 #include <linux/in.h> 38 #include <linux/in6.h> 39 #include <linux/mutex.h> 40 #include <linux/random.h> 41 #include <linux/idr.h> 42 #include <linux/inetdevice.h> 43 #include <linux/slab.h> 44 45 #include <net/tcp.h> 46 #include <net/ipv6.h> 47 48 #include <rdma/rdma_cm.h> 49 #include <rdma/rdma_cm_ib.h> 50 #include <rdma/rdma_netlink.h> 51 #include <rdma/ib_cache.h> 52 #include <rdma/ib_cm.h> 53 #include <rdma/ib_sa.h> 54 #include <rdma/iw_cm.h> 55 56 MODULE_AUTHOR("Sean Hefty"); 57 MODULE_DESCRIPTION("Generic RDMA CM Agent"); 58 MODULE_LICENSE("Dual BSD/GPL"); 59 60 #define CMA_CM_RESPONSE_TIMEOUT 20 61 #define CMA_MAX_CM_RETRIES 15 62 #define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24) 63 #define CMA_IBOE_PACKET_LIFETIME 18 64 65 static void cma_add_one(struct ib_device *device); 66 static void cma_remove_one(struct ib_device *device); 67 68 static struct ib_client cma_client = { 69 .name = "cma", 70 .add = cma_add_one, 71 .remove = cma_remove_one 72 }; 73 74 static struct ib_sa_client sa_client; 75 static struct rdma_addr_client addr_client; 76 static LIST_HEAD(dev_list); 77 static LIST_HEAD(listen_any_list); 78 static DEFINE_MUTEX(lock); 79 static struct workqueue_struct *cma_wq; 80 static DEFINE_IDR(sdp_ps); 81 static DEFINE_IDR(tcp_ps); 82 static DEFINE_IDR(udp_ps); 83 static DEFINE_IDR(ipoib_ps); 84 85 struct cma_device { 86 struct list_head list; 87 struct ib_device *device; 88 struct completion comp; 89 atomic_t refcount; 90 struct list_head id_list; 91 }; 92 93 struct rdma_bind_list { 94 struct idr *ps; 95 struct hlist_head owners; 96 unsigned short port; 97 }; 98 99 /* 100 * Device removal can occur at anytime, so we need extra handling to 101 * serialize notifying the user of device removal with other callbacks. 102 * We do this by disabling removal notification while a callback is in process, 103 * and reporting it after the callback completes. 104 */ 105 struct rdma_id_private { 106 struct rdma_cm_id id; 107 108 struct rdma_bind_list *bind_list; 109 struct hlist_node node; 110 struct list_head list; /* listen_any_list or cma_device.list */ 111 struct list_head listen_list; /* per device listens */ 112 struct cma_device *cma_dev; 113 struct list_head mc_list; 114 115 int internal_id; 116 enum rdma_cm_state state; 117 spinlock_t lock; 118 struct mutex qp_mutex; 119 120 struct completion comp; 121 atomic_t refcount; 122 struct mutex handler_mutex; 123 124 int backlog; 125 int timeout_ms; 126 struct ib_sa_query *query; 127 int query_id; 128 union { 129 struct ib_cm_id *ib; 130 struct iw_cm_id *iw; 131 } cm_id; 132 133 u32 seq_num; 134 u32 qkey; 135 u32 qp_num; 136 pid_t owner; 137 u8 srq; 138 u8 tos; 139 u8 reuseaddr; 140 }; 141 142 struct cma_multicast { 143 struct rdma_id_private *id_priv; 144 union { 145 struct ib_sa_multicast *ib; 146 } multicast; 147 struct list_head list; 148 void *context; 149 struct sockaddr_storage addr; 150 struct kref mcref; 151 }; 152 153 struct cma_work { 154 struct work_struct work; 155 struct rdma_id_private *id; 156 enum rdma_cm_state old_state; 157 enum rdma_cm_state new_state; 158 struct rdma_cm_event event; 159 }; 160 161 struct cma_ndev_work { 162 struct work_struct work; 163 struct rdma_id_private *id; 164 struct rdma_cm_event event; 165 }; 166 167 struct iboe_mcast_work { 168 struct work_struct work; 169 struct rdma_id_private *id; 170 struct cma_multicast *mc; 171 }; 172 173 union cma_ip_addr { 174 struct in6_addr ip6; 175 struct { 176 __be32 pad[3]; 177 __be32 addr; 178 } ip4; 179 }; 180 181 struct cma_hdr { 182 u8 cma_version; 183 u8 ip_version; /* IP version: 7:4 */ 184 __be16 port; 185 union cma_ip_addr src_addr; 186 union cma_ip_addr dst_addr; 187 }; 188 189 struct sdp_hh { 190 u8 bsdh[16]; 191 u8 sdp_version; /* Major version: 7:4 */ 192 u8 ip_version; /* IP version: 7:4 */ 193 u8 sdp_specific1[10]; 194 __be16 port; 195 __be16 sdp_specific2; 196 union cma_ip_addr src_addr; 197 union cma_ip_addr dst_addr; 198 }; 199 200 struct sdp_hah { 201 u8 bsdh[16]; 202 u8 sdp_version; 203 }; 204 205 #define CMA_VERSION 0x00 206 #define SDP_MAJ_VERSION 0x2 207 208 static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp) 209 { 210 unsigned long flags; 211 int ret; 212 213 spin_lock_irqsave(&id_priv->lock, flags); 214 ret = (id_priv->state == comp); 215 spin_unlock_irqrestore(&id_priv->lock, flags); 216 return ret; 217 } 218 219 static int cma_comp_exch(struct rdma_id_private *id_priv, 220 enum rdma_cm_state comp, enum rdma_cm_state exch) 221 { 222 unsigned long flags; 223 int ret; 224 225 spin_lock_irqsave(&id_priv->lock, flags); 226 if ((ret = (id_priv->state == comp))) 227 id_priv->state = exch; 228 spin_unlock_irqrestore(&id_priv->lock, flags); 229 return ret; 230 } 231 232 static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv, 233 enum rdma_cm_state exch) 234 { 235 unsigned long flags; 236 enum rdma_cm_state old; 237 238 spin_lock_irqsave(&id_priv->lock, flags); 239 old = id_priv->state; 240 id_priv->state = exch; 241 spin_unlock_irqrestore(&id_priv->lock, flags); 242 return old; 243 } 244 245 static inline u8 cma_get_ip_ver(struct cma_hdr *hdr) 246 { 247 return hdr->ip_version >> 4; 248 } 249 250 static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver) 251 { 252 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF); 253 } 254 255 static inline u8 sdp_get_majv(u8 sdp_version) 256 { 257 return sdp_version >> 4; 258 } 259 260 static inline u8 sdp_get_ip_ver(struct sdp_hh *hh) 261 { 262 return hh->ip_version >> 4; 263 } 264 265 static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver) 266 { 267 hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF); 268 } 269 270 static void cma_attach_to_dev(struct rdma_id_private *id_priv, 271 struct cma_device *cma_dev) 272 { 273 atomic_inc(&cma_dev->refcount); 274 id_priv->cma_dev = cma_dev; 275 id_priv->id.device = cma_dev->device; 276 id_priv->id.route.addr.dev_addr.transport = 277 rdma_node_get_transport(cma_dev->device->node_type); 278 list_add_tail(&id_priv->list, &cma_dev->id_list); 279 } 280 281 static inline void cma_deref_dev(struct cma_device *cma_dev) 282 { 283 if (atomic_dec_and_test(&cma_dev->refcount)) 284 complete(&cma_dev->comp); 285 } 286 287 static inline void release_mc(struct kref *kref) 288 { 289 struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref); 290 291 kfree(mc->multicast.ib); 292 kfree(mc); 293 } 294 295 static void cma_release_dev(struct rdma_id_private *id_priv) 296 { 297 mutex_lock(&lock); 298 list_del(&id_priv->list); 299 cma_deref_dev(id_priv->cma_dev); 300 id_priv->cma_dev = NULL; 301 mutex_unlock(&lock); 302 } 303 304 static int cma_set_qkey(struct rdma_id_private *id_priv) 305 { 306 struct ib_sa_mcmember_rec rec; 307 int ret = 0; 308 309 if (id_priv->qkey) 310 return 0; 311 312 switch (id_priv->id.ps) { 313 case RDMA_PS_UDP: 314 id_priv->qkey = RDMA_UDP_QKEY; 315 break; 316 case RDMA_PS_IPOIB: 317 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid); 318 ret = ib_sa_get_mcmember_rec(id_priv->id.device, 319 id_priv->id.port_num, &rec.mgid, 320 &rec); 321 if (!ret) 322 id_priv->qkey = be32_to_cpu(rec.qkey); 323 break; 324 default: 325 break; 326 } 327 return ret; 328 } 329 330 static int find_gid_port(struct ib_device *device, union ib_gid *gid, u8 port_num) 331 { 332 int i; 333 int err; 334 struct ib_port_attr props; 335 union ib_gid tmp; 336 337 err = ib_query_port(device, port_num, &props); 338 if (err) 339 return 1; 340 341 for (i = 0; i < props.gid_tbl_len; ++i) { 342 err = ib_query_gid(device, port_num, i, &tmp); 343 if (err) 344 return 1; 345 if (!memcmp(&tmp, gid, sizeof tmp)) 346 return 0; 347 } 348 349 return -EAGAIN; 350 } 351 352 static int cma_acquire_dev(struct rdma_id_private *id_priv) 353 { 354 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 355 struct cma_device *cma_dev; 356 union ib_gid gid, iboe_gid; 357 int ret = -ENODEV; 358 u8 port; 359 enum rdma_link_layer dev_ll = dev_addr->dev_type == ARPHRD_INFINIBAND ? 360 IB_LINK_LAYER_INFINIBAND : IB_LINK_LAYER_ETHERNET; 361 362 if (dev_ll != IB_LINK_LAYER_INFINIBAND && 363 id_priv->id.ps == RDMA_PS_IPOIB) 364 return -EINVAL; 365 366 mutex_lock(&lock); 367 iboe_addr_get_sgid(dev_addr, &iboe_gid); 368 memcpy(&gid, dev_addr->src_dev_addr + 369 rdma_addr_gid_offset(dev_addr), sizeof gid); 370 list_for_each_entry(cma_dev, &dev_list, list) { 371 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) { 372 if (rdma_port_get_link_layer(cma_dev->device, port) == dev_ll) { 373 if (rdma_node_get_transport(cma_dev->device->node_type) == RDMA_TRANSPORT_IB && 374 rdma_port_get_link_layer(cma_dev->device, port) == IB_LINK_LAYER_ETHERNET) 375 ret = find_gid_port(cma_dev->device, &iboe_gid, port); 376 else 377 ret = find_gid_port(cma_dev->device, &gid, port); 378 379 if (!ret) { 380 id_priv->id.port_num = port; 381 goto out; 382 } else if (ret == 1) 383 break; 384 } 385 } 386 } 387 388 out: 389 if (!ret) 390 cma_attach_to_dev(id_priv, cma_dev); 391 392 mutex_unlock(&lock); 393 return ret; 394 } 395 396 static void cma_deref_id(struct rdma_id_private *id_priv) 397 { 398 if (atomic_dec_and_test(&id_priv->refcount)) 399 complete(&id_priv->comp); 400 } 401 402 static int cma_disable_callback(struct rdma_id_private *id_priv, 403 enum rdma_cm_state state) 404 { 405 mutex_lock(&id_priv->handler_mutex); 406 if (id_priv->state != state) { 407 mutex_unlock(&id_priv->handler_mutex); 408 return -EINVAL; 409 } 410 return 0; 411 } 412 413 struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler, 414 void *context, enum rdma_port_space ps, 415 enum ib_qp_type qp_type) 416 { 417 struct rdma_id_private *id_priv; 418 419 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL); 420 if (!id_priv) 421 return ERR_PTR(-ENOMEM); 422 423 id_priv->owner = task_pid_nr(current); 424 id_priv->state = RDMA_CM_IDLE; 425 id_priv->id.context = context; 426 id_priv->id.event_handler = event_handler; 427 id_priv->id.ps = ps; 428 id_priv->id.qp_type = qp_type; 429 spin_lock_init(&id_priv->lock); 430 mutex_init(&id_priv->qp_mutex); 431 init_completion(&id_priv->comp); 432 atomic_set(&id_priv->refcount, 1); 433 mutex_init(&id_priv->handler_mutex); 434 INIT_LIST_HEAD(&id_priv->listen_list); 435 INIT_LIST_HEAD(&id_priv->mc_list); 436 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num); 437 438 return &id_priv->id; 439 } 440 EXPORT_SYMBOL(rdma_create_id); 441 442 static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp) 443 { 444 struct ib_qp_attr qp_attr; 445 int qp_attr_mask, ret; 446 447 qp_attr.qp_state = IB_QPS_INIT; 448 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 449 if (ret) 450 return ret; 451 452 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); 453 if (ret) 454 return ret; 455 456 qp_attr.qp_state = IB_QPS_RTR; 457 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE); 458 if (ret) 459 return ret; 460 461 qp_attr.qp_state = IB_QPS_RTS; 462 qp_attr.sq_psn = 0; 463 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN); 464 465 return ret; 466 } 467 468 static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp) 469 { 470 struct ib_qp_attr qp_attr; 471 int qp_attr_mask, ret; 472 473 qp_attr.qp_state = IB_QPS_INIT; 474 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 475 if (ret) 476 return ret; 477 478 return ib_modify_qp(qp, &qp_attr, qp_attr_mask); 479 } 480 481 int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd, 482 struct ib_qp_init_attr *qp_init_attr) 483 { 484 struct rdma_id_private *id_priv; 485 struct ib_qp *qp; 486 int ret; 487 488 id_priv = container_of(id, struct rdma_id_private, id); 489 if (id->device != pd->device) 490 return -EINVAL; 491 492 qp = ib_create_qp(pd, qp_init_attr); 493 if (IS_ERR(qp)) 494 return PTR_ERR(qp); 495 496 if (id->qp_type == IB_QPT_UD) 497 ret = cma_init_ud_qp(id_priv, qp); 498 else 499 ret = cma_init_conn_qp(id_priv, qp); 500 if (ret) 501 goto err; 502 503 id->qp = qp; 504 id_priv->qp_num = qp->qp_num; 505 id_priv->srq = (qp->srq != NULL); 506 return 0; 507 err: 508 ib_destroy_qp(qp); 509 return ret; 510 } 511 EXPORT_SYMBOL(rdma_create_qp); 512 513 void rdma_destroy_qp(struct rdma_cm_id *id) 514 { 515 struct rdma_id_private *id_priv; 516 517 id_priv = container_of(id, struct rdma_id_private, id); 518 mutex_lock(&id_priv->qp_mutex); 519 ib_destroy_qp(id_priv->id.qp); 520 id_priv->id.qp = NULL; 521 mutex_unlock(&id_priv->qp_mutex); 522 } 523 EXPORT_SYMBOL(rdma_destroy_qp); 524 525 static int cma_modify_qp_rtr(struct rdma_id_private *id_priv, 526 struct rdma_conn_param *conn_param) 527 { 528 struct ib_qp_attr qp_attr; 529 int qp_attr_mask, ret; 530 531 mutex_lock(&id_priv->qp_mutex); 532 if (!id_priv->id.qp) { 533 ret = 0; 534 goto out; 535 } 536 537 /* Need to update QP attributes from default values. */ 538 qp_attr.qp_state = IB_QPS_INIT; 539 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 540 if (ret) 541 goto out; 542 543 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); 544 if (ret) 545 goto out; 546 547 qp_attr.qp_state = IB_QPS_RTR; 548 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 549 if (ret) 550 goto out; 551 552 if (conn_param) 553 qp_attr.max_dest_rd_atomic = conn_param->responder_resources; 554 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); 555 out: 556 mutex_unlock(&id_priv->qp_mutex); 557 return ret; 558 } 559 560 static int cma_modify_qp_rts(struct rdma_id_private *id_priv, 561 struct rdma_conn_param *conn_param) 562 { 563 struct ib_qp_attr qp_attr; 564 int qp_attr_mask, ret; 565 566 mutex_lock(&id_priv->qp_mutex); 567 if (!id_priv->id.qp) { 568 ret = 0; 569 goto out; 570 } 571 572 qp_attr.qp_state = IB_QPS_RTS; 573 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 574 if (ret) 575 goto out; 576 577 if (conn_param) 578 qp_attr.max_rd_atomic = conn_param->initiator_depth; 579 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); 580 out: 581 mutex_unlock(&id_priv->qp_mutex); 582 return ret; 583 } 584 585 static int cma_modify_qp_err(struct rdma_id_private *id_priv) 586 { 587 struct ib_qp_attr qp_attr; 588 int ret; 589 590 mutex_lock(&id_priv->qp_mutex); 591 if (!id_priv->id.qp) { 592 ret = 0; 593 goto out; 594 } 595 596 qp_attr.qp_state = IB_QPS_ERR; 597 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE); 598 out: 599 mutex_unlock(&id_priv->qp_mutex); 600 return ret; 601 } 602 603 static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv, 604 struct ib_qp_attr *qp_attr, int *qp_attr_mask) 605 { 606 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 607 int ret; 608 u16 pkey; 609 610 if (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num) == 611 IB_LINK_LAYER_INFINIBAND) 612 pkey = ib_addr_get_pkey(dev_addr); 613 else 614 pkey = 0xffff; 615 616 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num, 617 pkey, &qp_attr->pkey_index); 618 if (ret) 619 return ret; 620 621 qp_attr->port_num = id_priv->id.port_num; 622 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT; 623 624 if (id_priv->id.qp_type == IB_QPT_UD) { 625 ret = cma_set_qkey(id_priv); 626 if (ret) 627 return ret; 628 629 qp_attr->qkey = id_priv->qkey; 630 *qp_attr_mask |= IB_QP_QKEY; 631 } else { 632 qp_attr->qp_access_flags = 0; 633 *qp_attr_mask |= IB_QP_ACCESS_FLAGS; 634 } 635 return 0; 636 } 637 638 int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr, 639 int *qp_attr_mask) 640 { 641 struct rdma_id_private *id_priv; 642 int ret = 0; 643 644 id_priv = container_of(id, struct rdma_id_private, id); 645 switch (rdma_node_get_transport(id_priv->id.device->node_type)) { 646 case RDMA_TRANSPORT_IB: 647 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD)) 648 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask); 649 else 650 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr, 651 qp_attr_mask); 652 if (qp_attr->qp_state == IB_QPS_RTR) 653 qp_attr->rq_psn = id_priv->seq_num; 654 break; 655 case RDMA_TRANSPORT_IWARP: 656 if (!id_priv->cm_id.iw) { 657 qp_attr->qp_access_flags = 0; 658 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS; 659 } else 660 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr, 661 qp_attr_mask); 662 break; 663 default: 664 ret = -ENOSYS; 665 break; 666 } 667 668 return ret; 669 } 670 EXPORT_SYMBOL(rdma_init_qp_attr); 671 672 static inline int cma_zero_addr(struct sockaddr *addr) 673 { 674 struct in6_addr *ip6; 675 676 if (addr->sa_family == AF_INET) 677 return ipv4_is_zeronet( 678 ((struct sockaddr_in *)addr)->sin_addr.s_addr); 679 else { 680 ip6 = &((struct sockaddr_in6 *) addr)->sin6_addr; 681 return (ip6->s6_addr32[0] | ip6->s6_addr32[1] | 682 ip6->s6_addr32[2] | ip6->s6_addr32[3]) == 0; 683 } 684 } 685 686 static inline int cma_loopback_addr(struct sockaddr *addr) 687 { 688 if (addr->sa_family == AF_INET) 689 return ipv4_is_loopback( 690 ((struct sockaddr_in *) addr)->sin_addr.s_addr); 691 else 692 return ipv6_addr_loopback( 693 &((struct sockaddr_in6 *) addr)->sin6_addr); 694 } 695 696 static inline int cma_any_addr(struct sockaddr *addr) 697 { 698 return cma_zero_addr(addr) || cma_loopback_addr(addr); 699 } 700 701 static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst) 702 { 703 if (src->sa_family != dst->sa_family) 704 return -1; 705 706 switch (src->sa_family) { 707 case AF_INET: 708 return ((struct sockaddr_in *) src)->sin_addr.s_addr != 709 ((struct sockaddr_in *) dst)->sin_addr.s_addr; 710 default: 711 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr, 712 &((struct sockaddr_in6 *) dst)->sin6_addr); 713 } 714 } 715 716 static inline __be16 cma_port(struct sockaddr *addr) 717 { 718 if (addr->sa_family == AF_INET) 719 return ((struct sockaddr_in *) addr)->sin_port; 720 else 721 return ((struct sockaddr_in6 *) addr)->sin6_port; 722 } 723 724 static inline int cma_any_port(struct sockaddr *addr) 725 { 726 return !cma_port(addr); 727 } 728 729 static int cma_get_net_info(void *hdr, enum rdma_port_space ps, 730 u8 *ip_ver, __be16 *port, 731 union cma_ip_addr **src, union cma_ip_addr **dst) 732 { 733 switch (ps) { 734 case RDMA_PS_SDP: 735 if (sdp_get_majv(((struct sdp_hh *) hdr)->sdp_version) != 736 SDP_MAJ_VERSION) 737 return -EINVAL; 738 739 *ip_ver = sdp_get_ip_ver(hdr); 740 *port = ((struct sdp_hh *) hdr)->port; 741 *src = &((struct sdp_hh *) hdr)->src_addr; 742 *dst = &((struct sdp_hh *) hdr)->dst_addr; 743 break; 744 default: 745 if (((struct cma_hdr *) hdr)->cma_version != CMA_VERSION) 746 return -EINVAL; 747 748 *ip_ver = cma_get_ip_ver(hdr); 749 *port = ((struct cma_hdr *) hdr)->port; 750 *src = &((struct cma_hdr *) hdr)->src_addr; 751 *dst = &((struct cma_hdr *) hdr)->dst_addr; 752 break; 753 } 754 755 if (*ip_ver != 4 && *ip_ver != 6) 756 return -EINVAL; 757 return 0; 758 } 759 760 static void cma_save_net_info(struct rdma_addr *addr, 761 struct rdma_addr *listen_addr, 762 u8 ip_ver, __be16 port, 763 union cma_ip_addr *src, union cma_ip_addr *dst) 764 { 765 struct sockaddr_in *listen4, *ip4; 766 struct sockaddr_in6 *listen6, *ip6; 767 768 switch (ip_ver) { 769 case 4: 770 listen4 = (struct sockaddr_in *) &listen_addr->src_addr; 771 ip4 = (struct sockaddr_in *) &addr->src_addr; 772 ip4->sin_family = listen4->sin_family; 773 ip4->sin_addr.s_addr = dst->ip4.addr; 774 ip4->sin_port = listen4->sin_port; 775 776 ip4 = (struct sockaddr_in *) &addr->dst_addr; 777 ip4->sin_family = listen4->sin_family; 778 ip4->sin_addr.s_addr = src->ip4.addr; 779 ip4->sin_port = port; 780 break; 781 case 6: 782 listen6 = (struct sockaddr_in6 *) &listen_addr->src_addr; 783 ip6 = (struct sockaddr_in6 *) &addr->src_addr; 784 ip6->sin6_family = listen6->sin6_family; 785 ip6->sin6_addr = dst->ip6; 786 ip6->sin6_port = listen6->sin6_port; 787 788 ip6 = (struct sockaddr_in6 *) &addr->dst_addr; 789 ip6->sin6_family = listen6->sin6_family; 790 ip6->sin6_addr = src->ip6; 791 ip6->sin6_port = port; 792 break; 793 default: 794 break; 795 } 796 } 797 798 static inline int cma_user_data_offset(enum rdma_port_space ps) 799 { 800 switch (ps) { 801 case RDMA_PS_SDP: 802 return 0; 803 default: 804 return sizeof(struct cma_hdr); 805 } 806 } 807 808 static void cma_cancel_route(struct rdma_id_private *id_priv) 809 { 810 switch (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num)) { 811 case IB_LINK_LAYER_INFINIBAND: 812 if (id_priv->query) 813 ib_sa_cancel_query(id_priv->query_id, id_priv->query); 814 break; 815 default: 816 break; 817 } 818 } 819 820 static void cma_cancel_listens(struct rdma_id_private *id_priv) 821 { 822 struct rdma_id_private *dev_id_priv; 823 824 /* 825 * Remove from listen_any_list to prevent added devices from spawning 826 * additional listen requests. 827 */ 828 mutex_lock(&lock); 829 list_del(&id_priv->list); 830 831 while (!list_empty(&id_priv->listen_list)) { 832 dev_id_priv = list_entry(id_priv->listen_list.next, 833 struct rdma_id_private, listen_list); 834 /* sync with device removal to avoid duplicate destruction */ 835 list_del_init(&dev_id_priv->list); 836 list_del(&dev_id_priv->listen_list); 837 mutex_unlock(&lock); 838 839 rdma_destroy_id(&dev_id_priv->id); 840 mutex_lock(&lock); 841 } 842 mutex_unlock(&lock); 843 } 844 845 static void cma_cancel_operation(struct rdma_id_private *id_priv, 846 enum rdma_cm_state state) 847 { 848 switch (state) { 849 case RDMA_CM_ADDR_QUERY: 850 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr); 851 break; 852 case RDMA_CM_ROUTE_QUERY: 853 cma_cancel_route(id_priv); 854 break; 855 case RDMA_CM_LISTEN: 856 if (cma_any_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr) 857 && !id_priv->cma_dev) 858 cma_cancel_listens(id_priv); 859 break; 860 default: 861 break; 862 } 863 } 864 865 static void cma_release_port(struct rdma_id_private *id_priv) 866 { 867 struct rdma_bind_list *bind_list = id_priv->bind_list; 868 869 if (!bind_list) 870 return; 871 872 mutex_lock(&lock); 873 hlist_del(&id_priv->node); 874 if (hlist_empty(&bind_list->owners)) { 875 idr_remove(bind_list->ps, bind_list->port); 876 kfree(bind_list); 877 } 878 mutex_unlock(&lock); 879 } 880 881 static void cma_leave_mc_groups(struct rdma_id_private *id_priv) 882 { 883 struct cma_multicast *mc; 884 885 while (!list_empty(&id_priv->mc_list)) { 886 mc = container_of(id_priv->mc_list.next, 887 struct cma_multicast, list); 888 list_del(&mc->list); 889 switch (rdma_port_get_link_layer(id_priv->cma_dev->device, id_priv->id.port_num)) { 890 case IB_LINK_LAYER_INFINIBAND: 891 ib_sa_free_multicast(mc->multicast.ib); 892 kfree(mc); 893 break; 894 case IB_LINK_LAYER_ETHERNET: 895 kref_put(&mc->mcref, release_mc); 896 break; 897 default: 898 break; 899 } 900 } 901 } 902 903 void rdma_destroy_id(struct rdma_cm_id *id) 904 { 905 struct rdma_id_private *id_priv; 906 enum rdma_cm_state state; 907 908 id_priv = container_of(id, struct rdma_id_private, id); 909 state = cma_exch(id_priv, RDMA_CM_DESTROYING); 910 cma_cancel_operation(id_priv, state); 911 912 /* 913 * Wait for any active callback to finish. New callbacks will find 914 * the id_priv state set to destroying and abort. 915 */ 916 mutex_lock(&id_priv->handler_mutex); 917 mutex_unlock(&id_priv->handler_mutex); 918 919 if (id_priv->cma_dev) { 920 switch (rdma_node_get_transport(id_priv->id.device->node_type)) { 921 case RDMA_TRANSPORT_IB: 922 if (id_priv->cm_id.ib) 923 ib_destroy_cm_id(id_priv->cm_id.ib); 924 break; 925 case RDMA_TRANSPORT_IWARP: 926 if (id_priv->cm_id.iw) 927 iw_destroy_cm_id(id_priv->cm_id.iw); 928 break; 929 default: 930 break; 931 } 932 cma_leave_mc_groups(id_priv); 933 cma_release_dev(id_priv); 934 } 935 936 cma_release_port(id_priv); 937 cma_deref_id(id_priv); 938 wait_for_completion(&id_priv->comp); 939 940 if (id_priv->internal_id) 941 cma_deref_id(id_priv->id.context); 942 943 kfree(id_priv->id.route.path_rec); 944 kfree(id_priv); 945 } 946 EXPORT_SYMBOL(rdma_destroy_id); 947 948 static int cma_rep_recv(struct rdma_id_private *id_priv) 949 { 950 int ret; 951 952 ret = cma_modify_qp_rtr(id_priv, NULL); 953 if (ret) 954 goto reject; 955 956 ret = cma_modify_qp_rts(id_priv, NULL); 957 if (ret) 958 goto reject; 959 960 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0); 961 if (ret) 962 goto reject; 963 964 return 0; 965 reject: 966 cma_modify_qp_err(id_priv); 967 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED, 968 NULL, 0, NULL, 0); 969 return ret; 970 } 971 972 static int cma_verify_rep(struct rdma_id_private *id_priv, void *data) 973 { 974 if (id_priv->id.ps == RDMA_PS_SDP && 975 sdp_get_majv(((struct sdp_hah *) data)->sdp_version) != 976 SDP_MAJ_VERSION) 977 return -EINVAL; 978 979 return 0; 980 } 981 982 static void cma_set_rep_event_data(struct rdma_cm_event *event, 983 struct ib_cm_rep_event_param *rep_data, 984 void *private_data) 985 { 986 event->param.conn.private_data = private_data; 987 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE; 988 event->param.conn.responder_resources = rep_data->responder_resources; 989 event->param.conn.initiator_depth = rep_data->initiator_depth; 990 event->param.conn.flow_control = rep_data->flow_control; 991 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count; 992 event->param.conn.srq = rep_data->srq; 993 event->param.conn.qp_num = rep_data->remote_qpn; 994 } 995 996 static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) 997 { 998 struct rdma_id_private *id_priv = cm_id->context; 999 struct rdma_cm_event event; 1000 int ret = 0; 1001 1002 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT && 1003 cma_disable_callback(id_priv, RDMA_CM_CONNECT)) || 1004 (ib_event->event == IB_CM_TIMEWAIT_EXIT && 1005 cma_disable_callback(id_priv, RDMA_CM_DISCONNECT))) 1006 return 0; 1007 1008 memset(&event, 0, sizeof event); 1009 switch (ib_event->event) { 1010 case IB_CM_REQ_ERROR: 1011 case IB_CM_REP_ERROR: 1012 event.event = RDMA_CM_EVENT_UNREACHABLE; 1013 event.status = -ETIMEDOUT; 1014 break; 1015 case IB_CM_REP_RECEIVED: 1016 event.status = cma_verify_rep(id_priv, ib_event->private_data); 1017 if (event.status) 1018 event.event = RDMA_CM_EVENT_CONNECT_ERROR; 1019 else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) { 1020 event.status = cma_rep_recv(id_priv); 1021 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR : 1022 RDMA_CM_EVENT_ESTABLISHED; 1023 } else 1024 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE; 1025 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd, 1026 ib_event->private_data); 1027 break; 1028 case IB_CM_RTU_RECEIVED: 1029 case IB_CM_USER_ESTABLISHED: 1030 event.event = RDMA_CM_EVENT_ESTABLISHED; 1031 break; 1032 case IB_CM_DREQ_ERROR: 1033 event.status = -ETIMEDOUT; /* fall through */ 1034 case IB_CM_DREQ_RECEIVED: 1035 case IB_CM_DREP_RECEIVED: 1036 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT, 1037 RDMA_CM_DISCONNECT)) 1038 goto out; 1039 event.event = RDMA_CM_EVENT_DISCONNECTED; 1040 break; 1041 case IB_CM_TIMEWAIT_EXIT: 1042 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT; 1043 break; 1044 case IB_CM_MRA_RECEIVED: 1045 /* ignore event */ 1046 goto out; 1047 case IB_CM_REJ_RECEIVED: 1048 cma_modify_qp_err(id_priv); 1049 event.status = ib_event->param.rej_rcvd.reason; 1050 event.event = RDMA_CM_EVENT_REJECTED; 1051 event.param.conn.private_data = ib_event->private_data; 1052 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE; 1053 break; 1054 default: 1055 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n", 1056 ib_event->event); 1057 goto out; 1058 } 1059 1060 ret = id_priv->id.event_handler(&id_priv->id, &event); 1061 if (ret) { 1062 /* Destroy the CM ID by returning a non-zero value. */ 1063 id_priv->cm_id.ib = NULL; 1064 cma_exch(id_priv, RDMA_CM_DESTROYING); 1065 mutex_unlock(&id_priv->handler_mutex); 1066 rdma_destroy_id(&id_priv->id); 1067 return ret; 1068 } 1069 out: 1070 mutex_unlock(&id_priv->handler_mutex); 1071 return ret; 1072 } 1073 1074 static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id, 1075 struct ib_cm_event *ib_event) 1076 { 1077 struct rdma_id_private *id_priv; 1078 struct rdma_cm_id *id; 1079 struct rdma_route *rt; 1080 union cma_ip_addr *src, *dst; 1081 __be16 port; 1082 u8 ip_ver; 1083 int ret; 1084 1085 if (cma_get_net_info(ib_event->private_data, listen_id->ps, 1086 &ip_ver, &port, &src, &dst)) 1087 return NULL; 1088 1089 id = rdma_create_id(listen_id->event_handler, listen_id->context, 1090 listen_id->ps, ib_event->param.req_rcvd.qp_type); 1091 if (IS_ERR(id)) 1092 return NULL; 1093 1094 cma_save_net_info(&id->route.addr, &listen_id->route.addr, 1095 ip_ver, port, src, dst); 1096 1097 rt = &id->route; 1098 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1; 1099 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths, 1100 GFP_KERNEL); 1101 if (!rt->path_rec) 1102 goto err; 1103 1104 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path; 1105 if (rt->num_paths == 2) 1106 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path; 1107 1108 if (cma_any_addr((struct sockaddr *) &rt->addr.src_addr)) { 1109 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND; 1110 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid); 1111 ib_addr_set_pkey(&rt->addr.dev_addr, rt->path_rec[0].pkey); 1112 } else { 1113 ret = rdma_translate_ip((struct sockaddr *) &rt->addr.src_addr, 1114 &rt->addr.dev_addr); 1115 if (ret) 1116 goto err; 1117 } 1118 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid); 1119 1120 id_priv = container_of(id, struct rdma_id_private, id); 1121 id_priv->state = RDMA_CM_CONNECT; 1122 return id_priv; 1123 1124 err: 1125 rdma_destroy_id(id); 1126 return NULL; 1127 } 1128 1129 static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id, 1130 struct ib_cm_event *ib_event) 1131 { 1132 struct rdma_id_private *id_priv; 1133 struct rdma_cm_id *id; 1134 union cma_ip_addr *src, *dst; 1135 __be16 port; 1136 u8 ip_ver; 1137 int ret; 1138 1139 id = rdma_create_id(listen_id->event_handler, listen_id->context, 1140 listen_id->ps, IB_QPT_UD); 1141 if (IS_ERR(id)) 1142 return NULL; 1143 1144 1145 if (cma_get_net_info(ib_event->private_data, listen_id->ps, 1146 &ip_ver, &port, &src, &dst)) 1147 goto err; 1148 1149 cma_save_net_info(&id->route.addr, &listen_id->route.addr, 1150 ip_ver, port, src, dst); 1151 1152 if (!cma_any_addr((struct sockaddr *) &id->route.addr.src_addr)) { 1153 ret = rdma_translate_ip((struct sockaddr *) &id->route.addr.src_addr, 1154 &id->route.addr.dev_addr); 1155 if (ret) 1156 goto err; 1157 } 1158 1159 id_priv = container_of(id, struct rdma_id_private, id); 1160 id_priv->state = RDMA_CM_CONNECT; 1161 return id_priv; 1162 err: 1163 rdma_destroy_id(id); 1164 return NULL; 1165 } 1166 1167 static void cma_set_req_event_data(struct rdma_cm_event *event, 1168 struct ib_cm_req_event_param *req_data, 1169 void *private_data, int offset) 1170 { 1171 event->param.conn.private_data = private_data + offset; 1172 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset; 1173 event->param.conn.responder_resources = req_data->responder_resources; 1174 event->param.conn.initiator_depth = req_data->initiator_depth; 1175 event->param.conn.flow_control = req_data->flow_control; 1176 event->param.conn.retry_count = req_data->retry_count; 1177 event->param.conn.rnr_retry_count = req_data->rnr_retry_count; 1178 event->param.conn.srq = req_data->srq; 1179 event->param.conn.qp_num = req_data->remote_qpn; 1180 } 1181 1182 static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) 1183 { 1184 struct rdma_id_private *listen_id, *conn_id; 1185 struct rdma_cm_event event; 1186 int offset, ret; 1187 1188 listen_id = cm_id->context; 1189 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN)) 1190 return -ECONNABORTED; 1191 1192 memset(&event, 0, sizeof event); 1193 offset = cma_user_data_offset(listen_id->id.ps); 1194 event.event = RDMA_CM_EVENT_CONNECT_REQUEST; 1195 if (listen_id->id.qp_type == IB_QPT_UD) { 1196 conn_id = cma_new_udp_id(&listen_id->id, ib_event); 1197 event.param.ud.private_data = ib_event->private_data + offset; 1198 event.param.ud.private_data_len = 1199 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset; 1200 } else { 1201 conn_id = cma_new_conn_id(&listen_id->id, ib_event); 1202 cma_set_req_event_data(&event, &ib_event->param.req_rcvd, 1203 ib_event->private_data, offset); 1204 } 1205 if (!conn_id) { 1206 ret = -ENOMEM; 1207 goto out; 1208 } 1209 1210 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING); 1211 ret = cma_acquire_dev(conn_id); 1212 if (ret) 1213 goto release_conn_id; 1214 1215 conn_id->cm_id.ib = cm_id; 1216 cm_id->context = conn_id; 1217 cm_id->cm_handler = cma_ib_handler; 1218 1219 /* 1220 * Protect against the user destroying conn_id from another thread 1221 * until we're done accessing it. 1222 */ 1223 atomic_inc(&conn_id->refcount); 1224 ret = conn_id->id.event_handler(&conn_id->id, &event); 1225 if (!ret) { 1226 /* 1227 * Acquire mutex to prevent user executing rdma_destroy_id() 1228 * while we're accessing the cm_id. 1229 */ 1230 mutex_lock(&lock); 1231 if (cma_comp(conn_id, RDMA_CM_CONNECT) && (conn_id->id.qp_type != IB_QPT_UD)) 1232 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0); 1233 mutex_unlock(&lock); 1234 mutex_unlock(&conn_id->handler_mutex); 1235 cma_deref_id(conn_id); 1236 goto out; 1237 } 1238 cma_deref_id(conn_id); 1239 1240 /* Destroy the CM ID by returning a non-zero value. */ 1241 conn_id->cm_id.ib = NULL; 1242 1243 release_conn_id: 1244 cma_exch(conn_id, RDMA_CM_DESTROYING); 1245 mutex_unlock(&conn_id->handler_mutex); 1246 rdma_destroy_id(&conn_id->id); 1247 1248 out: 1249 mutex_unlock(&listen_id->handler_mutex); 1250 return ret; 1251 } 1252 1253 static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr) 1254 { 1255 return cpu_to_be64(((u64)ps << 16) + be16_to_cpu(cma_port(addr))); 1256 } 1257 1258 static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr, 1259 struct ib_cm_compare_data *compare) 1260 { 1261 struct cma_hdr *cma_data, *cma_mask; 1262 struct sdp_hh *sdp_data, *sdp_mask; 1263 __be32 ip4_addr; 1264 struct in6_addr ip6_addr; 1265 1266 memset(compare, 0, sizeof *compare); 1267 cma_data = (void *) compare->data; 1268 cma_mask = (void *) compare->mask; 1269 sdp_data = (void *) compare->data; 1270 sdp_mask = (void *) compare->mask; 1271 1272 switch (addr->sa_family) { 1273 case AF_INET: 1274 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr; 1275 if (ps == RDMA_PS_SDP) { 1276 sdp_set_ip_ver(sdp_data, 4); 1277 sdp_set_ip_ver(sdp_mask, 0xF); 1278 sdp_data->dst_addr.ip4.addr = ip4_addr; 1279 sdp_mask->dst_addr.ip4.addr = htonl(~0); 1280 } else { 1281 cma_set_ip_ver(cma_data, 4); 1282 cma_set_ip_ver(cma_mask, 0xF); 1283 cma_data->dst_addr.ip4.addr = ip4_addr; 1284 cma_mask->dst_addr.ip4.addr = htonl(~0); 1285 } 1286 break; 1287 case AF_INET6: 1288 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr; 1289 if (ps == RDMA_PS_SDP) { 1290 sdp_set_ip_ver(sdp_data, 6); 1291 sdp_set_ip_ver(sdp_mask, 0xF); 1292 sdp_data->dst_addr.ip6 = ip6_addr; 1293 memset(&sdp_mask->dst_addr.ip6, 0xFF, 1294 sizeof sdp_mask->dst_addr.ip6); 1295 } else { 1296 cma_set_ip_ver(cma_data, 6); 1297 cma_set_ip_ver(cma_mask, 0xF); 1298 cma_data->dst_addr.ip6 = ip6_addr; 1299 memset(&cma_mask->dst_addr.ip6, 0xFF, 1300 sizeof cma_mask->dst_addr.ip6); 1301 } 1302 break; 1303 default: 1304 break; 1305 } 1306 } 1307 1308 static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event) 1309 { 1310 struct rdma_id_private *id_priv = iw_id->context; 1311 struct rdma_cm_event event; 1312 struct sockaddr_in *sin; 1313 int ret = 0; 1314 1315 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT)) 1316 return 0; 1317 1318 memset(&event, 0, sizeof event); 1319 switch (iw_event->event) { 1320 case IW_CM_EVENT_CLOSE: 1321 event.event = RDMA_CM_EVENT_DISCONNECTED; 1322 break; 1323 case IW_CM_EVENT_CONNECT_REPLY: 1324 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; 1325 *sin = iw_event->local_addr; 1326 sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr; 1327 *sin = iw_event->remote_addr; 1328 switch (iw_event->status) { 1329 case 0: 1330 event.event = RDMA_CM_EVENT_ESTABLISHED; 1331 break; 1332 case -ECONNRESET: 1333 case -ECONNREFUSED: 1334 event.event = RDMA_CM_EVENT_REJECTED; 1335 break; 1336 case -ETIMEDOUT: 1337 event.event = RDMA_CM_EVENT_UNREACHABLE; 1338 break; 1339 default: 1340 event.event = RDMA_CM_EVENT_CONNECT_ERROR; 1341 break; 1342 } 1343 break; 1344 case IW_CM_EVENT_ESTABLISHED: 1345 event.event = RDMA_CM_EVENT_ESTABLISHED; 1346 break; 1347 default: 1348 BUG_ON(1); 1349 } 1350 1351 event.status = iw_event->status; 1352 event.param.conn.private_data = iw_event->private_data; 1353 event.param.conn.private_data_len = iw_event->private_data_len; 1354 ret = id_priv->id.event_handler(&id_priv->id, &event); 1355 if (ret) { 1356 /* Destroy the CM ID by returning a non-zero value. */ 1357 id_priv->cm_id.iw = NULL; 1358 cma_exch(id_priv, RDMA_CM_DESTROYING); 1359 mutex_unlock(&id_priv->handler_mutex); 1360 rdma_destroy_id(&id_priv->id); 1361 return ret; 1362 } 1363 1364 mutex_unlock(&id_priv->handler_mutex); 1365 return ret; 1366 } 1367 1368 static int iw_conn_req_handler(struct iw_cm_id *cm_id, 1369 struct iw_cm_event *iw_event) 1370 { 1371 struct rdma_cm_id *new_cm_id; 1372 struct rdma_id_private *listen_id, *conn_id; 1373 struct sockaddr_in *sin; 1374 struct net_device *dev = NULL; 1375 struct rdma_cm_event event; 1376 int ret; 1377 struct ib_device_attr attr; 1378 1379 listen_id = cm_id->context; 1380 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN)) 1381 return -ECONNABORTED; 1382 1383 /* Create a new RDMA id for the new IW CM ID */ 1384 new_cm_id = rdma_create_id(listen_id->id.event_handler, 1385 listen_id->id.context, 1386 RDMA_PS_TCP, IB_QPT_RC); 1387 if (IS_ERR(new_cm_id)) { 1388 ret = -ENOMEM; 1389 goto out; 1390 } 1391 conn_id = container_of(new_cm_id, struct rdma_id_private, id); 1392 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING); 1393 conn_id->state = RDMA_CM_CONNECT; 1394 1395 dev = ip_dev_find(&init_net, iw_event->local_addr.sin_addr.s_addr); 1396 if (!dev) { 1397 ret = -EADDRNOTAVAIL; 1398 mutex_unlock(&conn_id->handler_mutex); 1399 rdma_destroy_id(new_cm_id); 1400 goto out; 1401 } 1402 ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL); 1403 if (ret) { 1404 mutex_unlock(&conn_id->handler_mutex); 1405 rdma_destroy_id(new_cm_id); 1406 goto out; 1407 } 1408 1409 ret = cma_acquire_dev(conn_id); 1410 if (ret) { 1411 mutex_unlock(&conn_id->handler_mutex); 1412 rdma_destroy_id(new_cm_id); 1413 goto out; 1414 } 1415 1416 conn_id->cm_id.iw = cm_id; 1417 cm_id->context = conn_id; 1418 cm_id->cm_handler = cma_iw_handler; 1419 1420 sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr; 1421 *sin = iw_event->local_addr; 1422 sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr; 1423 *sin = iw_event->remote_addr; 1424 1425 ret = ib_query_device(conn_id->id.device, &attr); 1426 if (ret) { 1427 mutex_unlock(&conn_id->handler_mutex); 1428 rdma_destroy_id(new_cm_id); 1429 goto out; 1430 } 1431 1432 memset(&event, 0, sizeof event); 1433 event.event = RDMA_CM_EVENT_CONNECT_REQUEST; 1434 event.param.conn.private_data = iw_event->private_data; 1435 event.param.conn.private_data_len = iw_event->private_data_len; 1436 event.param.conn.initiator_depth = attr.max_qp_init_rd_atom; 1437 event.param.conn.responder_resources = attr.max_qp_rd_atom; 1438 1439 /* 1440 * Protect against the user destroying conn_id from another thread 1441 * until we're done accessing it. 1442 */ 1443 atomic_inc(&conn_id->refcount); 1444 ret = conn_id->id.event_handler(&conn_id->id, &event); 1445 if (ret) { 1446 /* User wants to destroy the CM ID */ 1447 conn_id->cm_id.iw = NULL; 1448 cma_exch(conn_id, RDMA_CM_DESTROYING); 1449 mutex_unlock(&conn_id->handler_mutex); 1450 cma_deref_id(conn_id); 1451 rdma_destroy_id(&conn_id->id); 1452 goto out; 1453 } 1454 1455 mutex_unlock(&conn_id->handler_mutex); 1456 cma_deref_id(conn_id); 1457 1458 out: 1459 if (dev) 1460 dev_put(dev); 1461 mutex_unlock(&listen_id->handler_mutex); 1462 return ret; 1463 } 1464 1465 static int cma_ib_listen(struct rdma_id_private *id_priv) 1466 { 1467 struct ib_cm_compare_data compare_data; 1468 struct sockaddr *addr; 1469 struct ib_cm_id *id; 1470 __be64 svc_id; 1471 int ret; 1472 1473 id = ib_create_cm_id(id_priv->id.device, cma_req_handler, id_priv); 1474 if (IS_ERR(id)) 1475 return PTR_ERR(id); 1476 1477 id_priv->cm_id.ib = id; 1478 1479 addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr; 1480 svc_id = cma_get_service_id(id_priv->id.ps, addr); 1481 if (cma_any_addr(addr)) 1482 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL); 1483 else { 1484 cma_set_compare_data(id_priv->id.ps, addr, &compare_data); 1485 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data); 1486 } 1487 1488 if (ret) { 1489 ib_destroy_cm_id(id_priv->cm_id.ib); 1490 id_priv->cm_id.ib = NULL; 1491 } 1492 1493 return ret; 1494 } 1495 1496 static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog) 1497 { 1498 int ret; 1499 struct sockaddr_in *sin; 1500 struct iw_cm_id *id; 1501 1502 id = iw_create_cm_id(id_priv->id.device, 1503 iw_conn_req_handler, 1504 id_priv); 1505 if (IS_ERR(id)) 1506 return PTR_ERR(id); 1507 1508 id_priv->cm_id.iw = id; 1509 1510 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; 1511 id_priv->cm_id.iw->local_addr = *sin; 1512 1513 ret = iw_cm_listen(id_priv->cm_id.iw, backlog); 1514 1515 if (ret) { 1516 iw_destroy_cm_id(id_priv->cm_id.iw); 1517 id_priv->cm_id.iw = NULL; 1518 } 1519 1520 return ret; 1521 } 1522 1523 static int cma_listen_handler(struct rdma_cm_id *id, 1524 struct rdma_cm_event *event) 1525 { 1526 struct rdma_id_private *id_priv = id->context; 1527 1528 id->context = id_priv->id.context; 1529 id->event_handler = id_priv->id.event_handler; 1530 return id_priv->id.event_handler(id, event); 1531 } 1532 1533 static void cma_listen_on_dev(struct rdma_id_private *id_priv, 1534 struct cma_device *cma_dev) 1535 { 1536 struct rdma_id_private *dev_id_priv; 1537 struct rdma_cm_id *id; 1538 int ret; 1539 1540 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps, 1541 id_priv->id.qp_type); 1542 if (IS_ERR(id)) 1543 return; 1544 1545 dev_id_priv = container_of(id, struct rdma_id_private, id); 1546 1547 dev_id_priv->state = RDMA_CM_ADDR_BOUND; 1548 memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr, 1549 ip_addr_size((struct sockaddr *) &id_priv->id.route.addr.src_addr)); 1550 1551 cma_attach_to_dev(dev_id_priv, cma_dev); 1552 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list); 1553 atomic_inc(&id_priv->refcount); 1554 dev_id_priv->internal_id = 1; 1555 1556 ret = rdma_listen(id, id_priv->backlog); 1557 if (ret) 1558 printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, " 1559 "listening on device %s\n", ret, cma_dev->device->name); 1560 } 1561 1562 static void cma_listen_on_all(struct rdma_id_private *id_priv) 1563 { 1564 struct cma_device *cma_dev; 1565 1566 mutex_lock(&lock); 1567 list_add_tail(&id_priv->list, &listen_any_list); 1568 list_for_each_entry(cma_dev, &dev_list, list) 1569 cma_listen_on_dev(id_priv, cma_dev); 1570 mutex_unlock(&lock); 1571 } 1572 1573 void rdma_set_service_type(struct rdma_cm_id *id, int tos) 1574 { 1575 struct rdma_id_private *id_priv; 1576 1577 id_priv = container_of(id, struct rdma_id_private, id); 1578 id_priv->tos = (u8) tos; 1579 } 1580 EXPORT_SYMBOL(rdma_set_service_type); 1581 1582 static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec, 1583 void *context) 1584 { 1585 struct cma_work *work = context; 1586 struct rdma_route *route; 1587 1588 route = &work->id->id.route; 1589 1590 if (!status) { 1591 route->num_paths = 1; 1592 *route->path_rec = *path_rec; 1593 } else { 1594 work->old_state = RDMA_CM_ROUTE_QUERY; 1595 work->new_state = RDMA_CM_ADDR_RESOLVED; 1596 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR; 1597 work->event.status = status; 1598 } 1599 1600 queue_work(cma_wq, &work->work); 1601 } 1602 1603 static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms, 1604 struct cma_work *work) 1605 { 1606 struct rdma_addr *addr = &id_priv->id.route.addr; 1607 struct ib_sa_path_rec path_rec; 1608 ib_sa_comp_mask comp_mask; 1609 struct sockaddr_in6 *sin6; 1610 1611 memset(&path_rec, 0, sizeof path_rec); 1612 rdma_addr_get_sgid(&addr->dev_addr, &path_rec.sgid); 1613 rdma_addr_get_dgid(&addr->dev_addr, &path_rec.dgid); 1614 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(&addr->dev_addr)); 1615 path_rec.numb_path = 1; 1616 path_rec.reversible = 1; 1617 path_rec.service_id = cma_get_service_id(id_priv->id.ps, 1618 (struct sockaddr *) &addr->dst_addr); 1619 1620 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID | 1621 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH | 1622 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID; 1623 1624 if (addr->src_addr.ss_family == AF_INET) { 1625 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos); 1626 comp_mask |= IB_SA_PATH_REC_QOS_CLASS; 1627 } else { 1628 sin6 = (struct sockaddr_in6 *) &addr->src_addr; 1629 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20); 1630 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS; 1631 } 1632 1633 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device, 1634 id_priv->id.port_num, &path_rec, 1635 comp_mask, timeout_ms, 1636 GFP_KERNEL, cma_query_handler, 1637 work, &id_priv->query); 1638 1639 return (id_priv->query_id < 0) ? id_priv->query_id : 0; 1640 } 1641 1642 static void cma_work_handler(struct work_struct *_work) 1643 { 1644 struct cma_work *work = container_of(_work, struct cma_work, work); 1645 struct rdma_id_private *id_priv = work->id; 1646 int destroy = 0; 1647 1648 mutex_lock(&id_priv->handler_mutex); 1649 if (!cma_comp_exch(id_priv, work->old_state, work->new_state)) 1650 goto out; 1651 1652 if (id_priv->id.event_handler(&id_priv->id, &work->event)) { 1653 cma_exch(id_priv, RDMA_CM_DESTROYING); 1654 destroy = 1; 1655 } 1656 out: 1657 mutex_unlock(&id_priv->handler_mutex); 1658 cma_deref_id(id_priv); 1659 if (destroy) 1660 rdma_destroy_id(&id_priv->id); 1661 kfree(work); 1662 } 1663 1664 static void cma_ndev_work_handler(struct work_struct *_work) 1665 { 1666 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work); 1667 struct rdma_id_private *id_priv = work->id; 1668 int destroy = 0; 1669 1670 mutex_lock(&id_priv->handler_mutex); 1671 if (id_priv->state == RDMA_CM_DESTROYING || 1672 id_priv->state == RDMA_CM_DEVICE_REMOVAL) 1673 goto out; 1674 1675 if (id_priv->id.event_handler(&id_priv->id, &work->event)) { 1676 cma_exch(id_priv, RDMA_CM_DESTROYING); 1677 destroy = 1; 1678 } 1679 1680 out: 1681 mutex_unlock(&id_priv->handler_mutex); 1682 cma_deref_id(id_priv); 1683 if (destroy) 1684 rdma_destroy_id(&id_priv->id); 1685 kfree(work); 1686 } 1687 1688 static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms) 1689 { 1690 struct rdma_route *route = &id_priv->id.route; 1691 struct cma_work *work; 1692 int ret; 1693 1694 work = kzalloc(sizeof *work, GFP_KERNEL); 1695 if (!work) 1696 return -ENOMEM; 1697 1698 work->id = id_priv; 1699 INIT_WORK(&work->work, cma_work_handler); 1700 work->old_state = RDMA_CM_ROUTE_QUERY; 1701 work->new_state = RDMA_CM_ROUTE_RESOLVED; 1702 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 1703 1704 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL); 1705 if (!route->path_rec) { 1706 ret = -ENOMEM; 1707 goto err1; 1708 } 1709 1710 ret = cma_query_ib_route(id_priv, timeout_ms, work); 1711 if (ret) 1712 goto err2; 1713 1714 return 0; 1715 err2: 1716 kfree(route->path_rec); 1717 route->path_rec = NULL; 1718 err1: 1719 kfree(work); 1720 return ret; 1721 } 1722 1723 int rdma_set_ib_paths(struct rdma_cm_id *id, 1724 struct ib_sa_path_rec *path_rec, int num_paths) 1725 { 1726 struct rdma_id_private *id_priv; 1727 int ret; 1728 1729 id_priv = container_of(id, struct rdma_id_private, id); 1730 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, 1731 RDMA_CM_ROUTE_RESOLVED)) 1732 return -EINVAL; 1733 1734 id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths, 1735 GFP_KERNEL); 1736 if (!id->route.path_rec) { 1737 ret = -ENOMEM; 1738 goto err; 1739 } 1740 1741 id->route.num_paths = num_paths; 1742 return 0; 1743 err: 1744 cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED); 1745 return ret; 1746 } 1747 EXPORT_SYMBOL(rdma_set_ib_paths); 1748 1749 static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms) 1750 { 1751 struct cma_work *work; 1752 1753 work = kzalloc(sizeof *work, GFP_KERNEL); 1754 if (!work) 1755 return -ENOMEM; 1756 1757 work->id = id_priv; 1758 INIT_WORK(&work->work, cma_work_handler); 1759 work->old_state = RDMA_CM_ROUTE_QUERY; 1760 work->new_state = RDMA_CM_ROUTE_RESOLVED; 1761 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 1762 queue_work(cma_wq, &work->work); 1763 return 0; 1764 } 1765 1766 static int cma_resolve_iboe_route(struct rdma_id_private *id_priv) 1767 { 1768 struct rdma_route *route = &id_priv->id.route; 1769 struct rdma_addr *addr = &route->addr; 1770 struct cma_work *work; 1771 int ret; 1772 struct sockaddr_in *src_addr = (struct sockaddr_in *)&route->addr.src_addr; 1773 struct sockaddr_in *dst_addr = (struct sockaddr_in *)&route->addr.dst_addr; 1774 struct net_device *ndev = NULL; 1775 u16 vid; 1776 1777 if (src_addr->sin_family != dst_addr->sin_family) 1778 return -EINVAL; 1779 1780 work = kzalloc(sizeof *work, GFP_KERNEL); 1781 if (!work) 1782 return -ENOMEM; 1783 1784 work->id = id_priv; 1785 INIT_WORK(&work->work, cma_work_handler); 1786 1787 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL); 1788 if (!route->path_rec) { 1789 ret = -ENOMEM; 1790 goto err1; 1791 } 1792 1793 route->num_paths = 1; 1794 1795 if (addr->dev_addr.bound_dev_if) 1796 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if); 1797 if (!ndev) { 1798 ret = -ENODEV; 1799 goto err2; 1800 } 1801 1802 vid = rdma_vlan_dev_vlan_id(ndev); 1803 1804 iboe_mac_vlan_to_ll(&route->path_rec->sgid, addr->dev_addr.src_dev_addr, vid); 1805 iboe_mac_vlan_to_ll(&route->path_rec->dgid, addr->dev_addr.dst_dev_addr, vid); 1806 1807 route->path_rec->hop_limit = 1; 1808 route->path_rec->reversible = 1; 1809 route->path_rec->pkey = cpu_to_be16(0xffff); 1810 route->path_rec->mtu_selector = IB_SA_EQ; 1811 route->path_rec->sl = id_priv->tos >> 5; 1812 1813 route->path_rec->mtu = iboe_get_mtu(ndev->mtu); 1814 route->path_rec->rate_selector = IB_SA_EQ; 1815 route->path_rec->rate = iboe_get_rate(ndev); 1816 dev_put(ndev); 1817 route->path_rec->packet_life_time_selector = IB_SA_EQ; 1818 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME; 1819 if (!route->path_rec->mtu) { 1820 ret = -EINVAL; 1821 goto err2; 1822 } 1823 1824 work->old_state = RDMA_CM_ROUTE_QUERY; 1825 work->new_state = RDMA_CM_ROUTE_RESOLVED; 1826 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 1827 work->event.status = 0; 1828 1829 queue_work(cma_wq, &work->work); 1830 1831 return 0; 1832 1833 err2: 1834 kfree(route->path_rec); 1835 route->path_rec = NULL; 1836 err1: 1837 kfree(work); 1838 return ret; 1839 } 1840 1841 int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms) 1842 { 1843 struct rdma_id_private *id_priv; 1844 int ret; 1845 1846 id_priv = container_of(id, struct rdma_id_private, id); 1847 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY)) 1848 return -EINVAL; 1849 1850 atomic_inc(&id_priv->refcount); 1851 switch (rdma_node_get_transport(id->device->node_type)) { 1852 case RDMA_TRANSPORT_IB: 1853 switch (rdma_port_get_link_layer(id->device, id->port_num)) { 1854 case IB_LINK_LAYER_INFINIBAND: 1855 ret = cma_resolve_ib_route(id_priv, timeout_ms); 1856 break; 1857 case IB_LINK_LAYER_ETHERNET: 1858 ret = cma_resolve_iboe_route(id_priv); 1859 break; 1860 default: 1861 ret = -ENOSYS; 1862 } 1863 break; 1864 case RDMA_TRANSPORT_IWARP: 1865 ret = cma_resolve_iw_route(id_priv, timeout_ms); 1866 break; 1867 default: 1868 ret = -ENOSYS; 1869 break; 1870 } 1871 if (ret) 1872 goto err; 1873 1874 return 0; 1875 err: 1876 cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED); 1877 cma_deref_id(id_priv); 1878 return ret; 1879 } 1880 EXPORT_SYMBOL(rdma_resolve_route); 1881 1882 static int cma_bind_loopback(struct rdma_id_private *id_priv) 1883 { 1884 struct cma_device *cma_dev; 1885 struct ib_port_attr port_attr; 1886 union ib_gid gid; 1887 u16 pkey; 1888 int ret; 1889 u8 p; 1890 1891 mutex_lock(&lock); 1892 if (list_empty(&dev_list)) { 1893 ret = -ENODEV; 1894 goto out; 1895 } 1896 list_for_each_entry(cma_dev, &dev_list, list) 1897 for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p) 1898 if (!ib_query_port(cma_dev->device, p, &port_attr) && 1899 port_attr.state == IB_PORT_ACTIVE) 1900 goto port_found; 1901 1902 p = 1; 1903 cma_dev = list_entry(dev_list.next, struct cma_device, list); 1904 1905 port_found: 1906 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid); 1907 if (ret) 1908 goto out; 1909 1910 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey); 1911 if (ret) 1912 goto out; 1913 1914 id_priv->id.route.addr.dev_addr.dev_type = 1915 (rdma_port_get_link_layer(cma_dev->device, p) == IB_LINK_LAYER_INFINIBAND) ? 1916 ARPHRD_INFINIBAND : ARPHRD_ETHER; 1917 1918 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid); 1919 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey); 1920 id_priv->id.port_num = p; 1921 cma_attach_to_dev(id_priv, cma_dev); 1922 out: 1923 mutex_unlock(&lock); 1924 return ret; 1925 } 1926 1927 static void addr_handler(int status, struct sockaddr *src_addr, 1928 struct rdma_dev_addr *dev_addr, void *context) 1929 { 1930 struct rdma_id_private *id_priv = context; 1931 struct rdma_cm_event event; 1932 1933 memset(&event, 0, sizeof event); 1934 mutex_lock(&id_priv->handler_mutex); 1935 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, 1936 RDMA_CM_ADDR_RESOLVED)) 1937 goto out; 1938 1939 if (!status && !id_priv->cma_dev) 1940 status = cma_acquire_dev(id_priv); 1941 1942 if (status) { 1943 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, 1944 RDMA_CM_ADDR_BOUND)) 1945 goto out; 1946 event.event = RDMA_CM_EVENT_ADDR_ERROR; 1947 event.status = status; 1948 } else { 1949 memcpy(&id_priv->id.route.addr.src_addr, src_addr, 1950 ip_addr_size(src_addr)); 1951 event.event = RDMA_CM_EVENT_ADDR_RESOLVED; 1952 } 1953 1954 if (id_priv->id.event_handler(&id_priv->id, &event)) { 1955 cma_exch(id_priv, RDMA_CM_DESTROYING); 1956 mutex_unlock(&id_priv->handler_mutex); 1957 cma_deref_id(id_priv); 1958 rdma_destroy_id(&id_priv->id); 1959 return; 1960 } 1961 out: 1962 mutex_unlock(&id_priv->handler_mutex); 1963 cma_deref_id(id_priv); 1964 } 1965 1966 static int cma_resolve_loopback(struct rdma_id_private *id_priv) 1967 { 1968 struct cma_work *work; 1969 struct sockaddr *src, *dst; 1970 union ib_gid gid; 1971 int ret; 1972 1973 work = kzalloc(sizeof *work, GFP_KERNEL); 1974 if (!work) 1975 return -ENOMEM; 1976 1977 if (!id_priv->cma_dev) { 1978 ret = cma_bind_loopback(id_priv); 1979 if (ret) 1980 goto err; 1981 } 1982 1983 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid); 1984 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid); 1985 1986 src = (struct sockaddr *) &id_priv->id.route.addr.src_addr; 1987 if (cma_zero_addr(src)) { 1988 dst = (struct sockaddr *) &id_priv->id.route.addr.dst_addr; 1989 if ((src->sa_family = dst->sa_family) == AF_INET) { 1990 ((struct sockaddr_in *) src)->sin_addr.s_addr = 1991 ((struct sockaddr_in *) dst)->sin_addr.s_addr; 1992 } else { 1993 ipv6_addr_copy(&((struct sockaddr_in6 *) src)->sin6_addr, 1994 &((struct sockaddr_in6 *) dst)->sin6_addr); 1995 } 1996 } 1997 1998 work->id = id_priv; 1999 INIT_WORK(&work->work, cma_work_handler); 2000 work->old_state = RDMA_CM_ADDR_QUERY; 2001 work->new_state = RDMA_CM_ADDR_RESOLVED; 2002 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED; 2003 queue_work(cma_wq, &work->work); 2004 return 0; 2005 err: 2006 kfree(work); 2007 return ret; 2008 } 2009 2010 static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, 2011 struct sockaddr *dst_addr) 2012 { 2013 if (!src_addr || !src_addr->sa_family) { 2014 src_addr = (struct sockaddr *) &id->route.addr.src_addr; 2015 if ((src_addr->sa_family = dst_addr->sa_family) == AF_INET6) { 2016 ((struct sockaddr_in6 *) src_addr)->sin6_scope_id = 2017 ((struct sockaddr_in6 *) dst_addr)->sin6_scope_id; 2018 } 2019 } 2020 return rdma_bind_addr(id, src_addr); 2021 } 2022 2023 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, 2024 struct sockaddr *dst_addr, int timeout_ms) 2025 { 2026 struct rdma_id_private *id_priv; 2027 int ret; 2028 2029 id_priv = container_of(id, struct rdma_id_private, id); 2030 if (id_priv->state == RDMA_CM_IDLE) { 2031 ret = cma_bind_addr(id, src_addr, dst_addr); 2032 if (ret) 2033 return ret; 2034 } 2035 2036 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY)) 2037 return -EINVAL; 2038 2039 atomic_inc(&id_priv->refcount); 2040 memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr)); 2041 if (cma_any_addr(dst_addr)) 2042 ret = cma_resolve_loopback(id_priv); 2043 else 2044 ret = rdma_resolve_ip(&addr_client, (struct sockaddr *) &id->route.addr.src_addr, 2045 dst_addr, &id->route.addr.dev_addr, 2046 timeout_ms, addr_handler, id_priv); 2047 if (ret) 2048 goto err; 2049 2050 return 0; 2051 err: 2052 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND); 2053 cma_deref_id(id_priv); 2054 return ret; 2055 } 2056 EXPORT_SYMBOL(rdma_resolve_addr); 2057 2058 int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse) 2059 { 2060 struct rdma_id_private *id_priv; 2061 unsigned long flags; 2062 int ret; 2063 2064 id_priv = container_of(id, struct rdma_id_private, id); 2065 spin_lock_irqsave(&id_priv->lock, flags); 2066 if (id_priv->state == RDMA_CM_IDLE) { 2067 id_priv->reuseaddr = reuse; 2068 ret = 0; 2069 } else { 2070 ret = -EINVAL; 2071 } 2072 spin_unlock_irqrestore(&id_priv->lock, flags); 2073 return ret; 2074 } 2075 EXPORT_SYMBOL(rdma_set_reuseaddr); 2076 2077 static void cma_bind_port(struct rdma_bind_list *bind_list, 2078 struct rdma_id_private *id_priv) 2079 { 2080 struct sockaddr_in *sin; 2081 2082 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; 2083 sin->sin_port = htons(bind_list->port); 2084 id_priv->bind_list = bind_list; 2085 hlist_add_head(&id_priv->node, &bind_list->owners); 2086 } 2087 2088 static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv, 2089 unsigned short snum) 2090 { 2091 struct rdma_bind_list *bind_list; 2092 int port, ret; 2093 2094 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL); 2095 if (!bind_list) 2096 return -ENOMEM; 2097 2098 do { 2099 ret = idr_get_new_above(ps, bind_list, snum, &port); 2100 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL)); 2101 2102 if (ret) 2103 goto err1; 2104 2105 if (port != snum) { 2106 ret = -EADDRNOTAVAIL; 2107 goto err2; 2108 } 2109 2110 bind_list->ps = ps; 2111 bind_list->port = (unsigned short) port; 2112 cma_bind_port(bind_list, id_priv); 2113 return 0; 2114 err2: 2115 idr_remove(ps, port); 2116 err1: 2117 kfree(bind_list); 2118 return ret; 2119 } 2120 2121 static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv) 2122 { 2123 static unsigned int last_used_port; 2124 int low, high, remaining; 2125 unsigned int rover; 2126 2127 inet_get_local_port_range(&low, &high); 2128 remaining = (high - low) + 1; 2129 rover = net_random() % remaining + low; 2130 retry: 2131 if (last_used_port != rover && 2132 !idr_find(ps, (unsigned short) rover)) { 2133 int ret = cma_alloc_port(ps, id_priv, rover); 2134 /* 2135 * Remember previously used port number in order to avoid 2136 * re-using same port immediately after it is closed. 2137 */ 2138 if (!ret) 2139 last_used_port = rover; 2140 if (ret != -EADDRNOTAVAIL) 2141 return ret; 2142 } 2143 if (--remaining) { 2144 rover++; 2145 if ((rover < low) || (rover > high)) 2146 rover = low; 2147 goto retry; 2148 } 2149 return -EADDRNOTAVAIL; 2150 } 2151 2152 /* 2153 * Check that the requested port is available. This is called when trying to 2154 * bind to a specific port, or when trying to listen on a bound port. In 2155 * the latter case, the provided id_priv may already be on the bind_list, but 2156 * we still need to check that it's okay to start listening. 2157 */ 2158 static int cma_check_port(struct rdma_bind_list *bind_list, 2159 struct rdma_id_private *id_priv, uint8_t reuseaddr) 2160 { 2161 struct rdma_id_private *cur_id; 2162 struct sockaddr *addr, *cur_addr; 2163 struct hlist_node *node; 2164 2165 addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr; 2166 if (cma_any_addr(addr) && !reuseaddr) 2167 return -EADDRNOTAVAIL; 2168 2169 hlist_for_each_entry(cur_id, node, &bind_list->owners, node) { 2170 if (id_priv == cur_id) 2171 continue; 2172 2173 if ((cur_id->state == RDMA_CM_LISTEN) || 2174 !reuseaddr || !cur_id->reuseaddr) { 2175 cur_addr = (struct sockaddr *) &cur_id->id.route.addr.src_addr; 2176 if (cma_any_addr(cur_addr)) 2177 return -EADDRNOTAVAIL; 2178 2179 if (!cma_addr_cmp(addr, cur_addr)) 2180 return -EADDRINUSE; 2181 } 2182 } 2183 return 0; 2184 } 2185 2186 static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv) 2187 { 2188 struct rdma_bind_list *bind_list; 2189 unsigned short snum; 2190 int ret; 2191 2192 snum = ntohs(cma_port((struct sockaddr *) &id_priv->id.route.addr.src_addr)); 2193 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE)) 2194 return -EACCES; 2195 2196 bind_list = idr_find(ps, snum); 2197 if (!bind_list) { 2198 ret = cma_alloc_port(ps, id_priv, snum); 2199 } else { 2200 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr); 2201 if (!ret) 2202 cma_bind_port(bind_list, id_priv); 2203 } 2204 return ret; 2205 } 2206 2207 static int cma_bind_listen(struct rdma_id_private *id_priv) 2208 { 2209 struct rdma_bind_list *bind_list = id_priv->bind_list; 2210 int ret = 0; 2211 2212 mutex_lock(&lock); 2213 if (bind_list->owners.first->next) 2214 ret = cma_check_port(bind_list, id_priv, 0); 2215 mutex_unlock(&lock); 2216 return ret; 2217 } 2218 2219 static int cma_get_port(struct rdma_id_private *id_priv) 2220 { 2221 struct idr *ps; 2222 int ret; 2223 2224 switch (id_priv->id.ps) { 2225 case RDMA_PS_SDP: 2226 ps = &sdp_ps; 2227 break; 2228 case RDMA_PS_TCP: 2229 ps = &tcp_ps; 2230 break; 2231 case RDMA_PS_UDP: 2232 ps = &udp_ps; 2233 break; 2234 case RDMA_PS_IPOIB: 2235 ps = &ipoib_ps; 2236 break; 2237 default: 2238 return -EPROTONOSUPPORT; 2239 } 2240 2241 mutex_lock(&lock); 2242 if (cma_any_port((struct sockaddr *) &id_priv->id.route.addr.src_addr)) 2243 ret = cma_alloc_any_port(ps, id_priv); 2244 else 2245 ret = cma_use_port(ps, id_priv); 2246 mutex_unlock(&lock); 2247 2248 return ret; 2249 } 2250 2251 static int cma_check_linklocal(struct rdma_dev_addr *dev_addr, 2252 struct sockaddr *addr) 2253 { 2254 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 2255 struct sockaddr_in6 *sin6; 2256 2257 if (addr->sa_family != AF_INET6) 2258 return 0; 2259 2260 sin6 = (struct sockaddr_in6 *) addr; 2261 if ((ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) && 2262 !sin6->sin6_scope_id) 2263 return -EINVAL; 2264 2265 dev_addr->bound_dev_if = sin6->sin6_scope_id; 2266 #endif 2267 return 0; 2268 } 2269 2270 int rdma_listen(struct rdma_cm_id *id, int backlog) 2271 { 2272 struct rdma_id_private *id_priv; 2273 int ret; 2274 2275 id_priv = container_of(id, struct rdma_id_private, id); 2276 if (id_priv->state == RDMA_CM_IDLE) { 2277 ((struct sockaddr *) &id->route.addr.src_addr)->sa_family = AF_INET; 2278 ret = rdma_bind_addr(id, (struct sockaddr *) &id->route.addr.src_addr); 2279 if (ret) 2280 return ret; 2281 } 2282 2283 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN)) 2284 return -EINVAL; 2285 2286 if (id_priv->reuseaddr) { 2287 ret = cma_bind_listen(id_priv); 2288 if (ret) 2289 goto err; 2290 } 2291 2292 id_priv->backlog = backlog; 2293 if (id->device) { 2294 switch (rdma_node_get_transport(id->device->node_type)) { 2295 case RDMA_TRANSPORT_IB: 2296 ret = cma_ib_listen(id_priv); 2297 if (ret) 2298 goto err; 2299 break; 2300 case RDMA_TRANSPORT_IWARP: 2301 ret = cma_iw_listen(id_priv, backlog); 2302 if (ret) 2303 goto err; 2304 break; 2305 default: 2306 ret = -ENOSYS; 2307 goto err; 2308 } 2309 } else 2310 cma_listen_on_all(id_priv); 2311 2312 return 0; 2313 err: 2314 id_priv->backlog = 0; 2315 cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND); 2316 return ret; 2317 } 2318 EXPORT_SYMBOL(rdma_listen); 2319 2320 int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr) 2321 { 2322 struct rdma_id_private *id_priv; 2323 int ret; 2324 2325 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6) 2326 return -EAFNOSUPPORT; 2327 2328 id_priv = container_of(id, struct rdma_id_private, id); 2329 if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND)) 2330 return -EINVAL; 2331 2332 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr); 2333 if (ret) 2334 goto err1; 2335 2336 if (!cma_any_addr(addr)) { 2337 ret = rdma_translate_ip(addr, &id->route.addr.dev_addr); 2338 if (ret) 2339 goto err1; 2340 2341 ret = cma_acquire_dev(id_priv); 2342 if (ret) 2343 goto err1; 2344 } 2345 2346 memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr)); 2347 ret = cma_get_port(id_priv); 2348 if (ret) 2349 goto err2; 2350 2351 return 0; 2352 err2: 2353 if (id_priv->cma_dev) 2354 cma_release_dev(id_priv); 2355 err1: 2356 cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE); 2357 return ret; 2358 } 2359 EXPORT_SYMBOL(rdma_bind_addr); 2360 2361 static int cma_format_hdr(void *hdr, enum rdma_port_space ps, 2362 struct rdma_route *route) 2363 { 2364 struct cma_hdr *cma_hdr; 2365 struct sdp_hh *sdp_hdr; 2366 2367 if (route->addr.src_addr.ss_family == AF_INET) { 2368 struct sockaddr_in *src4, *dst4; 2369 2370 src4 = (struct sockaddr_in *) &route->addr.src_addr; 2371 dst4 = (struct sockaddr_in *) &route->addr.dst_addr; 2372 2373 switch (ps) { 2374 case RDMA_PS_SDP: 2375 sdp_hdr = hdr; 2376 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION) 2377 return -EINVAL; 2378 sdp_set_ip_ver(sdp_hdr, 4); 2379 sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; 2380 sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; 2381 sdp_hdr->port = src4->sin_port; 2382 break; 2383 default: 2384 cma_hdr = hdr; 2385 cma_hdr->cma_version = CMA_VERSION; 2386 cma_set_ip_ver(cma_hdr, 4); 2387 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; 2388 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; 2389 cma_hdr->port = src4->sin_port; 2390 break; 2391 } 2392 } else { 2393 struct sockaddr_in6 *src6, *dst6; 2394 2395 src6 = (struct sockaddr_in6 *) &route->addr.src_addr; 2396 dst6 = (struct sockaddr_in6 *) &route->addr.dst_addr; 2397 2398 switch (ps) { 2399 case RDMA_PS_SDP: 2400 sdp_hdr = hdr; 2401 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION) 2402 return -EINVAL; 2403 sdp_set_ip_ver(sdp_hdr, 6); 2404 sdp_hdr->src_addr.ip6 = src6->sin6_addr; 2405 sdp_hdr->dst_addr.ip6 = dst6->sin6_addr; 2406 sdp_hdr->port = src6->sin6_port; 2407 break; 2408 default: 2409 cma_hdr = hdr; 2410 cma_hdr->cma_version = CMA_VERSION; 2411 cma_set_ip_ver(cma_hdr, 6); 2412 cma_hdr->src_addr.ip6 = src6->sin6_addr; 2413 cma_hdr->dst_addr.ip6 = dst6->sin6_addr; 2414 cma_hdr->port = src6->sin6_port; 2415 break; 2416 } 2417 } 2418 return 0; 2419 } 2420 2421 static int cma_sidr_rep_handler(struct ib_cm_id *cm_id, 2422 struct ib_cm_event *ib_event) 2423 { 2424 struct rdma_id_private *id_priv = cm_id->context; 2425 struct rdma_cm_event event; 2426 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd; 2427 int ret = 0; 2428 2429 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT)) 2430 return 0; 2431 2432 memset(&event, 0, sizeof event); 2433 switch (ib_event->event) { 2434 case IB_CM_SIDR_REQ_ERROR: 2435 event.event = RDMA_CM_EVENT_UNREACHABLE; 2436 event.status = -ETIMEDOUT; 2437 break; 2438 case IB_CM_SIDR_REP_RECEIVED: 2439 event.param.ud.private_data = ib_event->private_data; 2440 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE; 2441 if (rep->status != IB_SIDR_SUCCESS) { 2442 event.event = RDMA_CM_EVENT_UNREACHABLE; 2443 event.status = ib_event->param.sidr_rep_rcvd.status; 2444 break; 2445 } 2446 ret = cma_set_qkey(id_priv); 2447 if (ret) { 2448 event.event = RDMA_CM_EVENT_ADDR_ERROR; 2449 event.status = -EINVAL; 2450 break; 2451 } 2452 if (id_priv->qkey != rep->qkey) { 2453 event.event = RDMA_CM_EVENT_UNREACHABLE; 2454 event.status = -EINVAL; 2455 break; 2456 } 2457 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num, 2458 id_priv->id.route.path_rec, 2459 &event.param.ud.ah_attr); 2460 event.param.ud.qp_num = rep->qpn; 2461 event.param.ud.qkey = rep->qkey; 2462 event.event = RDMA_CM_EVENT_ESTABLISHED; 2463 event.status = 0; 2464 break; 2465 default: 2466 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n", 2467 ib_event->event); 2468 goto out; 2469 } 2470 2471 ret = id_priv->id.event_handler(&id_priv->id, &event); 2472 if (ret) { 2473 /* Destroy the CM ID by returning a non-zero value. */ 2474 id_priv->cm_id.ib = NULL; 2475 cma_exch(id_priv, RDMA_CM_DESTROYING); 2476 mutex_unlock(&id_priv->handler_mutex); 2477 rdma_destroy_id(&id_priv->id); 2478 return ret; 2479 } 2480 out: 2481 mutex_unlock(&id_priv->handler_mutex); 2482 return ret; 2483 } 2484 2485 static int cma_resolve_ib_udp(struct rdma_id_private *id_priv, 2486 struct rdma_conn_param *conn_param) 2487 { 2488 struct ib_cm_sidr_req_param req; 2489 struct rdma_route *route; 2490 struct ib_cm_id *id; 2491 int ret; 2492 2493 req.private_data_len = sizeof(struct cma_hdr) + 2494 conn_param->private_data_len; 2495 req.private_data = kzalloc(req.private_data_len, GFP_ATOMIC); 2496 if (!req.private_data) 2497 return -ENOMEM; 2498 2499 if (conn_param->private_data && conn_param->private_data_len) 2500 memcpy((void *) req.private_data + sizeof(struct cma_hdr), 2501 conn_param->private_data, conn_param->private_data_len); 2502 2503 route = &id_priv->id.route; 2504 ret = cma_format_hdr((void *) req.private_data, id_priv->id.ps, route); 2505 if (ret) 2506 goto out; 2507 2508 id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler, 2509 id_priv); 2510 if (IS_ERR(id)) { 2511 ret = PTR_ERR(id); 2512 goto out; 2513 } 2514 id_priv->cm_id.ib = id; 2515 2516 req.path = route->path_rec; 2517 req.service_id = cma_get_service_id(id_priv->id.ps, 2518 (struct sockaddr *) &route->addr.dst_addr); 2519 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8); 2520 req.max_cm_retries = CMA_MAX_CM_RETRIES; 2521 2522 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req); 2523 if (ret) { 2524 ib_destroy_cm_id(id_priv->cm_id.ib); 2525 id_priv->cm_id.ib = NULL; 2526 } 2527 out: 2528 kfree(req.private_data); 2529 return ret; 2530 } 2531 2532 static int cma_connect_ib(struct rdma_id_private *id_priv, 2533 struct rdma_conn_param *conn_param) 2534 { 2535 struct ib_cm_req_param req; 2536 struct rdma_route *route; 2537 void *private_data; 2538 struct ib_cm_id *id; 2539 int offset, ret; 2540 2541 memset(&req, 0, sizeof req); 2542 offset = cma_user_data_offset(id_priv->id.ps); 2543 req.private_data_len = offset + conn_param->private_data_len; 2544 private_data = kzalloc(req.private_data_len, GFP_ATOMIC); 2545 if (!private_data) 2546 return -ENOMEM; 2547 2548 if (conn_param->private_data && conn_param->private_data_len) 2549 memcpy(private_data + offset, conn_param->private_data, 2550 conn_param->private_data_len); 2551 2552 id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv); 2553 if (IS_ERR(id)) { 2554 ret = PTR_ERR(id); 2555 goto out; 2556 } 2557 id_priv->cm_id.ib = id; 2558 2559 route = &id_priv->id.route; 2560 ret = cma_format_hdr(private_data, id_priv->id.ps, route); 2561 if (ret) 2562 goto out; 2563 req.private_data = private_data; 2564 2565 req.primary_path = &route->path_rec[0]; 2566 if (route->num_paths == 2) 2567 req.alternate_path = &route->path_rec[1]; 2568 2569 req.service_id = cma_get_service_id(id_priv->id.ps, 2570 (struct sockaddr *) &route->addr.dst_addr); 2571 req.qp_num = id_priv->qp_num; 2572 req.qp_type = IB_QPT_RC; 2573 req.starting_psn = id_priv->seq_num; 2574 req.responder_resources = conn_param->responder_resources; 2575 req.initiator_depth = conn_param->initiator_depth; 2576 req.flow_control = conn_param->flow_control; 2577 req.retry_count = conn_param->retry_count; 2578 req.rnr_retry_count = conn_param->rnr_retry_count; 2579 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; 2580 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; 2581 req.max_cm_retries = CMA_MAX_CM_RETRIES; 2582 req.srq = id_priv->srq ? 1 : 0; 2583 2584 ret = ib_send_cm_req(id_priv->cm_id.ib, &req); 2585 out: 2586 if (ret && !IS_ERR(id)) { 2587 ib_destroy_cm_id(id); 2588 id_priv->cm_id.ib = NULL; 2589 } 2590 2591 kfree(private_data); 2592 return ret; 2593 } 2594 2595 static int cma_connect_iw(struct rdma_id_private *id_priv, 2596 struct rdma_conn_param *conn_param) 2597 { 2598 struct iw_cm_id *cm_id; 2599 struct sockaddr_in* sin; 2600 int ret; 2601 struct iw_cm_conn_param iw_param; 2602 2603 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv); 2604 if (IS_ERR(cm_id)) 2605 return PTR_ERR(cm_id); 2606 2607 id_priv->cm_id.iw = cm_id; 2608 2609 sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr; 2610 cm_id->local_addr = *sin; 2611 2612 sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr; 2613 cm_id->remote_addr = *sin; 2614 2615 ret = cma_modify_qp_rtr(id_priv, conn_param); 2616 if (ret) 2617 goto out; 2618 2619 iw_param.ord = conn_param->initiator_depth; 2620 iw_param.ird = conn_param->responder_resources; 2621 iw_param.private_data = conn_param->private_data; 2622 iw_param.private_data_len = conn_param->private_data_len; 2623 if (id_priv->id.qp) 2624 iw_param.qpn = id_priv->qp_num; 2625 else 2626 iw_param.qpn = conn_param->qp_num; 2627 ret = iw_cm_connect(cm_id, &iw_param); 2628 out: 2629 if (ret) { 2630 iw_destroy_cm_id(cm_id); 2631 id_priv->cm_id.iw = NULL; 2632 } 2633 return ret; 2634 } 2635 2636 int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) 2637 { 2638 struct rdma_id_private *id_priv; 2639 int ret; 2640 2641 id_priv = container_of(id, struct rdma_id_private, id); 2642 if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT)) 2643 return -EINVAL; 2644 2645 if (!id->qp) { 2646 id_priv->qp_num = conn_param->qp_num; 2647 id_priv->srq = conn_param->srq; 2648 } 2649 2650 switch (rdma_node_get_transport(id->device->node_type)) { 2651 case RDMA_TRANSPORT_IB: 2652 if (id->qp_type == IB_QPT_UD) 2653 ret = cma_resolve_ib_udp(id_priv, conn_param); 2654 else 2655 ret = cma_connect_ib(id_priv, conn_param); 2656 break; 2657 case RDMA_TRANSPORT_IWARP: 2658 ret = cma_connect_iw(id_priv, conn_param); 2659 break; 2660 default: 2661 ret = -ENOSYS; 2662 break; 2663 } 2664 if (ret) 2665 goto err; 2666 2667 return 0; 2668 err: 2669 cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED); 2670 return ret; 2671 } 2672 EXPORT_SYMBOL(rdma_connect); 2673 2674 static int cma_accept_ib(struct rdma_id_private *id_priv, 2675 struct rdma_conn_param *conn_param) 2676 { 2677 struct ib_cm_rep_param rep; 2678 int ret; 2679 2680 ret = cma_modify_qp_rtr(id_priv, conn_param); 2681 if (ret) 2682 goto out; 2683 2684 ret = cma_modify_qp_rts(id_priv, conn_param); 2685 if (ret) 2686 goto out; 2687 2688 memset(&rep, 0, sizeof rep); 2689 rep.qp_num = id_priv->qp_num; 2690 rep.starting_psn = id_priv->seq_num; 2691 rep.private_data = conn_param->private_data; 2692 rep.private_data_len = conn_param->private_data_len; 2693 rep.responder_resources = conn_param->responder_resources; 2694 rep.initiator_depth = conn_param->initiator_depth; 2695 rep.failover_accepted = 0; 2696 rep.flow_control = conn_param->flow_control; 2697 rep.rnr_retry_count = conn_param->rnr_retry_count; 2698 rep.srq = id_priv->srq ? 1 : 0; 2699 2700 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep); 2701 out: 2702 return ret; 2703 } 2704 2705 static int cma_accept_iw(struct rdma_id_private *id_priv, 2706 struct rdma_conn_param *conn_param) 2707 { 2708 struct iw_cm_conn_param iw_param; 2709 int ret; 2710 2711 ret = cma_modify_qp_rtr(id_priv, conn_param); 2712 if (ret) 2713 return ret; 2714 2715 iw_param.ord = conn_param->initiator_depth; 2716 iw_param.ird = conn_param->responder_resources; 2717 iw_param.private_data = conn_param->private_data; 2718 iw_param.private_data_len = conn_param->private_data_len; 2719 if (id_priv->id.qp) { 2720 iw_param.qpn = id_priv->qp_num; 2721 } else 2722 iw_param.qpn = conn_param->qp_num; 2723 2724 return iw_cm_accept(id_priv->cm_id.iw, &iw_param); 2725 } 2726 2727 static int cma_send_sidr_rep(struct rdma_id_private *id_priv, 2728 enum ib_cm_sidr_status status, 2729 const void *private_data, int private_data_len) 2730 { 2731 struct ib_cm_sidr_rep_param rep; 2732 int ret; 2733 2734 memset(&rep, 0, sizeof rep); 2735 rep.status = status; 2736 if (status == IB_SIDR_SUCCESS) { 2737 ret = cma_set_qkey(id_priv); 2738 if (ret) 2739 return ret; 2740 rep.qp_num = id_priv->qp_num; 2741 rep.qkey = id_priv->qkey; 2742 } 2743 rep.private_data = private_data; 2744 rep.private_data_len = private_data_len; 2745 2746 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep); 2747 } 2748 2749 int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) 2750 { 2751 struct rdma_id_private *id_priv; 2752 int ret; 2753 2754 id_priv = container_of(id, struct rdma_id_private, id); 2755 2756 id_priv->owner = task_pid_nr(current); 2757 2758 if (!cma_comp(id_priv, RDMA_CM_CONNECT)) 2759 return -EINVAL; 2760 2761 if (!id->qp && conn_param) { 2762 id_priv->qp_num = conn_param->qp_num; 2763 id_priv->srq = conn_param->srq; 2764 } 2765 2766 switch (rdma_node_get_transport(id->device->node_type)) { 2767 case RDMA_TRANSPORT_IB: 2768 if (id->qp_type == IB_QPT_UD) 2769 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS, 2770 conn_param->private_data, 2771 conn_param->private_data_len); 2772 else if (conn_param) 2773 ret = cma_accept_ib(id_priv, conn_param); 2774 else 2775 ret = cma_rep_recv(id_priv); 2776 break; 2777 case RDMA_TRANSPORT_IWARP: 2778 ret = cma_accept_iw(id_priv, conn_param); 2779 break; 2780 default: 2781 ret = -ENOSYS; 2782 break; 2783 } 2784 2785 if (ret) 2786 goto reject; 2787 2788 return 0; 2789 reject: 2790 cma_modify_qp_err(id_priv); 2791 rdma_reject(id, NULL, 0); 2792 return ret; 2793 } 2794 EXPORT_SYMBOL(rdma_accept); 2795 2796 int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event) 2797 { 2798 struct rdma_id_private *id_priv; 2799 int ret; 2800 2801 id_priv = container_of(id, struct rdma_id_private, id); 2802 if (!id_priv->cm_id.ib) 2803 return -EINVAL; 2804 2805 switch (id->device->node_type) { 2806 case RDMA_NODE_IB_CA: 2807 ret = ib_cm_notify(id_priv->cm_id.ib, event); 2808 break; 2809 default: 2810 ret = 0; 2811 break; 2812 } 2813 return ret; 2814 } 2815 EXPORT_SYMBOL(rdma_notify); 2816 2817 int rdma_reject(struct rdma_cm_id *id, const void *private_data, 2818 u8 private_data_len) 2819 { 2820 struct rdma_id_private *id_priv; 2821 int ret; 2822 2823 id_priv = container_of(id, struct rdma_id_private, id); 2824 if (!id_priv->cm_id.ib) 2825 return -EINVAL; 2826 2827 switch (rdma_node_get_transport(id->device->node_type)) { 2828 case RDMA_TRANSPORT_IB: 2829 if (id->qp_type == IB_QPT_UD) 2830 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 2831 private_data, private_data_len); 2832 else 2833 ret = ib_send_cm_rej(id_priv->cm_id.ib, 2834 IB_CM_REJ_CONSUMER_DEFINED, NULL, 2835 0, private_data, private_data_len); 2836 break; 2837 case RDMA_TRANSPORT_IWARP: 2838 ret = iw_cm_reject(id_priv->cm_id.iw, 2839 private_data, private_data_len); 2840 break; 2841 default: 2842 ret = -ENOSYS; 2843 break; 2844 } 2845 return ret; 2846 } 2847 EXPORT_SYMBOL(rdma_reject); 2848 2849 int rdma_disconnect(struct rdma_cm_id *id) 2850 { 2851 struct rdma_id_private *id_priv; 2852 int ret; 2853 2854 id_priv = container_of(id, struct rdma_id_private, id); 2855 if (!id_priv->cm_id.ib) 2856 return -EINVAL; 2857 2858 switch (rdma_node_get_transport(id->device->node_type)) { 2859 case RDMA_TRANSPORT_IB: 2860 ret = cma_modify_qp_err(id_priv); 2861 if (ret) 2862 goto out; 2863 /* Initiate or respond to a disconnect. */ 2864 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0)) 2865 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0); 2866 break; 2867 case RDMA_TRANSPORT_IWARP: 2868 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0); 2869 break; 2870 default: 2871 ret = -EINVAL; 2872 break; 2873 } 2874 out: 2875 return ret; 2876 } 2877 EXPORT_SYMBOL(rdma_disconnect); 2878 2879 static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast) 2880 { 2881 struct rdma_id_private *id_priv; 2882 struct cma_multicast *mc = multicast->context; 2883 struct rdma_cm_event event; 2884 int ret; 2885 2886 id_priv = mc->id_priv; 2887 if (cma_disable_callback(id_priv, RDMA_CM_ADDR_BOUND) && 2888 cma_disable_callback(id_priv, RDMA_CM_ADDR_RESOLVED)) 2889 return 0; 2890 2891 mutex_lock(&id_priv->qp_mutex); 2892 if (!status && id_priv->id.qp) 2893 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid, 2894 multicast->rec.mlid); 2895 mutex_unlock(&id_priv->qp_mutex); 2896 2897 memset(&event, 0, sizeof event); 2898 event.status = status; 2899 event.param.ud.private_data = mc->context; 2900 if (!status) { 2901 event.event = RDMA_CM_EVENT_MULTICAST_JOIN; 2902 ib_init_ah_from_mcmember(id_priv->id.device, 2903 id_priv->id.port_num, &multicast->rec, 2904 &event.param.ud.ah_attr); 2905 event.param.ud.qp_num = 0xFFFFFF; 2906 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey); 2907 } else 2908 event.event = RDMA_CM_EVENT_MULTICAST_ERROR; 2909 2910 ret = id_priv->id.event_handler(&id_priv->id, &event); 2911 if (ret) { 2912 cma_exch(id_priv, RDMA_CM_DESTROYING); 2913 mutex_unlock(&id_priv->handler_mutex); 2914 rdma_destroy_id(&id_priv->id); 2915 return 0; 2916 } 2917 2918 mutex_unlock(&id_priv->handler_mutex); 2919 return 0; 2920 } 2921 2922 static void cma_set_mgid(struct rdma_id_private *id_priv, 2923 struct sockaddr *addr, union ib_gid *mgid) 2924 { 2925 unsigned char mc_map[MAX_ADDR_LEN]; 2926 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 2927 struct sockaddr_in *sin = (struct sockaddr_in *) addr; 2928 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr; 2929 2930 if (cma_any_addr(addr)) { 2931 memset(mgid, 0, sizeof *mgid); 2932 } else if ((addr->sa_family == AF_INET6) && 2933 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) == 2934 0xFF10A01B)) { 2935 /* IPv6 address is an SA assigned MGID. */ 2936 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid); 2937 } else if ((addr->sa_family == AF_INET6)) { 2938 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map); 2939 if (id_priv->id.ps == RDMA_PS_UDP) 2940 mc_map[7] = 0x01; /* Use RDMA CM signature */ 2941 *mgid = *(union ib_gid *) (mc_map + 4); 2942 } else { 2943 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map); 2944 if (id_priv->id.ps == RDMA_PS_UDP) 2945 mc_map[7] = 0x01; /* Use RDMA CM signature */ 2946 *mgid = *(union ib_gid *) (mc_map + 4); 2947 } 2948 } 2949 2950 static int cma_join_ib_multicast(struct rdma_id_private *id_priv, 2951 struct cma_multicast *mc) 2952 { 2953 struct ib_sa_mcmember_rec rec; 2954 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 2955 ib_sa_comp_mask comp_mask; 2956 int ret; 2957 2958 ib_addr_get_mgid(dev_addr, &rec.mgid); 2959 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num, 2960 &rec.mgid, &rec); 2961 if (ret) 2962 return ret; 2963 2964 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid); 2965 if (id_priv->id.ps == RDMA_PS_UDP) 2966 rec.qkey = cpu_to_be32(RDMA_UDP_QKEY); 2967 rdma_addr_get_sgid(dev_addr, &rec.port_gid); 2968 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); 2969 rec.join_state = 1; 2970 2971 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID | 2972 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE | 2973 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL | 2974 IB_SA_MCMEMBER_REC_FLOW_LABEL | 2975 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS; 2976 2977 if (id_priv->id.ps == RDMA_PS_IPOIB) 2978 comp_mask |= IB_SA_MCMEMBER_REC_RATE | 2979 IB_SA_MCMEMBER_REC_RATE_SELECTOR; 2980 2981 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device, 2982 id_priv->id.port_num, &rec, 2983 comp_mask, GFP_KERNEL, 2984 cma_ib_mc_handler, mc); 2985 if (IS_ERR(mc->multicast.ib)) 2986 return PTR_ERR(mc->multicast.ib); 2987 2988 return 0; 2989 } 2990 2991 static void iboe_mcast_work_handler(struct work_struct *work) 2992 { 2993 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work); 2994 struct cma_multicast *mc = mw->mc; 2995 struct ib_sa_multicast *m = mc->multicast.ib; 2996 2997 mc->multicast.ib->context = mc; 2998 cma_ib_mc_handler(0, m); 2999 kref_put(&mc->mcref, release_mc); 3000 kfree(mw); 3001 } 3002 3003 static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid) 3004 { 3005 struct sockaddr_in *sin = (struct sockaddr_in *)addr; 3006 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr; 3007 3008 if (cma_any_addr(addr)) { 3009 memset(mgid, 0, sizeof *mgid); 3010 } else if (addr->sa_family == AF_INET6) { 3011 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid); 3012 } else { 3013 mgid->raw[0] = 0xff; 3014 mgid->raw[1] = 0x0e; 3015 mgid->raw[2] = 0; 3016 mgid->raw[3] = 0; 3017 mgid->raw[4] = 0; 3018 mgid->raw[5] = 0; 3019 mgid->raw[6] = 0; 3020 mgid->raw[7] = 0; 3021 mgid->raw[8] = 0; 3022 mgid->raw[9] = 0; 3023 mgid->raw[10] = 0xff; 3024 mgid->raw[11] = 0xff; 3025 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr; 3026 } 3027 } 3028 3029 static int cma_iboe_join_multicast(struct rdma_id_private *id_priv, 3030 struct cma_multicast *mc) 3031 { 3032 struct iboe_mcast_work *work; 3033 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 3034 int err; 3035 struct sockaddr *addr = (struct sockaddr *)&mc->addr; 3036 struct net_device *ndev = NULL; 3037 3038 if (cma_zero_addr((struct sockaddr *)&mc->addr)) 3039 return -EINVAL; 3040 3041 work = kzalloc(sizeof *work, GFP_KERNEL); 3042 if (!work) 3043 return -ENOMEM; 3044 3045 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL); 3046 if (!mc->multicast.ib) { 3047 err = -ENOMEM; 3048 goto out1; 3049 } 3050 3051 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid); 3052 3053 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff); 3054 if (id_priv->id.ps == RDMA_PS_UDP) 3055 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY); 3056 3057 if (dev_addr->bound_dev_if) 3058 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if); 3059 if (!ndev) { 3060 err = -ENODEV; 3061 goto out2; 3062 } 3063 mc->multicast.ib->rec.rate = iboe_get_rate(ndev); 3064 mc->multicast.ib->rec.hop_limit = 1; 3065 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu); 3066 dev_put(ndev); 3067 if (!mc->multicast.ib->rec.mtu) { 3068 err = -EINVAL; 3069 goto out2; 3070 } 3071 iboe_addr_get_sgid(dev_addr, &mc->multicast.ib->rec.port_gid); 3072 work->id = id_priv; 3073 work->mc = mc; 3074 INIT_WORK(&work->work, iboe_mcast_work_handler); 3075 kref_get(&mc->mcref); 3076 queue_work(cma_wq, &work->work); 3077 3078 return 0; 3079 3080 out2: 3081 kfree(mc->multicast.ib); 3082 out1: 3083 kfree(work); 3084 return err; 3085 } 3086 3087 int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr, 3088 void *context) 3089 { 3090 struct rdma_id_private *id_priv; 3091 struct cma_multicast *mc; 3092 int ret; 3093 3094 id_priv = container_of(id, struct rdma_id_private, id); 3095 if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) && 3096 !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED)) 3097 return -EINVAL; 3098 3099 mc = kmalloc(sizeof *mc, GFP_KERNEL); 3100 if (!mc) 3101 return -ENOMEM; 3102 3103 memcpy(&mc->addr, addr, ip_addr_size(addr)); 3104 mc->context = context; 3105 mc->id_priv = id_priv; 3106 3107 spin_lock(&id_priv->lock); 3108 list_add(&mc->list, &id_priv->mc_list); 3109 spin_unlock(&id_priv->lock); 3110 3111 switch (rdma_node_get_transport(id->device->node_type)) { 3112 case RDMA_TRANSPORT_IB: 3113 switch (rdma_port_get_link_layer(id->device, id->port_num)) { 3114 case IB_LINK_LAYER_INFINIBAND: 3115 ret = cma_join_ib_multicast(id_priv, mc); 3116 break; 3117 case IB_LINK_LAYER_ETHERNET: 3118 kref_init(&mc->mcref); 3119 ret = cma_iboe_join_multicast(id_priv, mc); 3120 break; 3121 default: 3122 ret = -EINVAL; 3123 } 3124 break; 3125 default: 3126 ret = -ENOSYS; 3127 break; 3128 } 3129 3130 if (ret) { 3131 spin_lock_irq(&id_priv->lock); 3132 list_del(&mc->list); 3133 spin_unlock_irq(&id_priv->lock); 3134 kfree(mc); 3135 } 3136 return ret; 3137 } 3138 EXPORT_SYMBOL(rdma_join_multicast); 3139 3140 void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr) 3141 { 3142 struct rdma_id_private *id_priv; 3143 struct cma_multicast *mc; 3144 3145 id_priv = container_of(id, struct rdma_id_private, id); 3146 spin_lock_irq(&id_priv->lock); 3147 list_for_each_entry(mc, &id_priv->mc_list, list) { 3148 if (!memcmp(&mc->addr, addr, ip_addr_size(addr))) { 3149 list_del(&mc->list); 3150 spin_unlock_irq(&id_priv->lock); 3151 3152 if (id->qp) 3153 ib_detach_mcast(id->qp, 3154 &mc->multicast.ib->rec.mgid, 3155 mc->multicast.ib->rec.mlid); 3156 if (rdma_node_get_transport(id_priv->cma_dev->device->node_type) == RDMA_TRANSPORT_IB) { 3157 switch (rdma_port_get_link_layer(id->device, id->port_num)) { 3158 case IB_LINK_LAYER_INFINIBAND: 3159 ib_sa_free_multicast(mc->multicast.ib); 3160 kfree(mc); 3161 break; 3162 case IB_LINK_LAYER_ETHERNET: 3163 kref_put(&mc->mcref, release_mc); 3164 break; 3165 default: 3166 break; 3167 } 3168 } 3169 return; 3170 } 3171 } 3172 spin_unlock_irq(&id_priv->lock); 3173 } 3174 EXPORT_SYMBOL(rdma_leave_multicast); 3175 3176 static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv) 3177 { 3178 struct rdma_dev_addr *dev_addr; 3179 struct cma_ndev_work *work; 3180 3181 dev_addr = &id_priv->id.route.addr.dev_addr; 3182 3183 if ((dev_addr->bound_dev_if == ndev->ifindex) && 3184 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) { 3185 printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n", 3186 ndev->name, &id_priv->id); 3187 work = kzalloc(sizeof *work, GFP_KERNEL); 3188 if (!work) 3189 return -ENOMEM; 3190 3191 INIT_WORK(&work->work, cma_ndev_work_handler); 3192 work->id = id_priv; 3193 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE; 3194 atomic_inc(&id_priv->refcount); 3195 queue_work(cma_wq, &work->work); 3196 } 3197 3198 return 0; 3199 } 3200 3201 static int cma_netdev_callback(struct notifier_block *self, unsigned long event, 3202 void *ctx) 3203 { 3204 struct net_device *ndev = (struct net_device *)ctx; 3205 struct cma_device *cma_dev; 3206 struct rdma_id_private *id_priv; 3207 int ret = NOTIFY_DONE; 3208 3209 if (dev_net(ndev) != &init_net) 3210 return NOTIFY_DONE; 3211 3212 if (event != NETDEV_BONDING_FAILOVER) 3213 return NOTIFY_DONE; 3214 3215 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING)) 3216 return NOTIFY_DONE; 3217 3218 mutex_lock(&lock); 3219 list_for_each_entry(cma_dev, &dev_list, list) 3220 list_for_each_entry(id_priv, &cma_dev->id_list, list) { 3221 ret = cma_netdev_change(ndev, id_priv); 3222 if (ret) 3223 goto out; 3224 } 3225 3226 out: 3227 mutex_unlock(&lock); 3228 return ret; 3229 } 3230 3231 static struct notifier_block cma_nb = { 3232 .notifier_call = cma_netdev_callback 3233 }; 3234 3235 static void cma_add_one(struct ib_device *device) 3236 { 3237 struct cma_device *cma_dev; 3238 struct rdma_id_private *id_priv; 3239 3240 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL); 3241 if (!cma_dev) 3242 return; 3243 3244 cma_dev->device = device; 3245 3246 init_completion(&cma_dev->comp); 3247 atomic_set(&cma_dev->refcount, 1); 3248 INIT_LIST_HEAD(&cma_dev->id_list); 3249 ib_set_client_data(device, &cma_client, cma_dev); 3250 3251 mutex_lock(&lock); 3252 list_add_tail(&cma_dev->list, &dev_list); 3253 list_for_each_entry(id_priv, &listen_any_list, list) 3254 cma_listen_on_dev(id_priv, cma_dev); 3255 mutex_unlock(&lock); 3256 } 3257 3258 static int cma_remove_id_dev(struct rdma_id_private *id_priv) 3259 { 3260 struct rdma_cm_event event; 3261 enum rdma_cm_state state; 3262 int ret = 0; 3263 3264 /* Record that we want to remove the device */ 3265 state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL); 3266 if (state == RDMA_CM_DESTROYING) 3267 return 0; 3268 3269 cma_cancel_operation(id_priv, state); 3270 mutex_lock(&id_priv->handler_mutex); 3271 3272 /* Check for destruction from another callback. */ 3273 if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL)) 3274 goto out; 3275 3276 memset(&event, 0, sizeof event); 3277 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL; 3278 ret = id_priv->id.event_handler(&id_priv->id, &event); 3279 out: 3280 mutex_unlock(&id_priv->handler_mutex); 3281 return ret; 3282 } 3283 3284 static void cma_process_remove(struct cma_device *cma_dev) 3285 { 3286 struct rdma_id_private *id_priv; 3287 int ret; 3288 3289 mutex_lock(&lock); 3290 while (!list_empty(&cma_dev->id_list)) { 3291 id_priv = list_entry(cma_dev->id_list.next, 3292 struct rdma_id_private, list); 3293 3294 list_del(&id_priv->listen_list); 3295 list_del_init(&id_priv->list); 3296 atomic_inc(&id_priv->refcount); 3297 mutex_unlock(&lock); 3298 3299 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv); 3300 cma_deref_id(id_priv); 3301 if (ret) 3302 rdma_destroy_id(&id_priv->id); 3303 3304 mutex_lock(&lock); 3305 } 3306 mutex_unlock(&lock); 3307 3308 cma_deref_dev(cma_dev); 3309 wait_for_completion(&cma_dev->comp); 3310 } 3311 3312 static void cma_remove_one(struct ib_device *device) 3313 { 3314 struct cma_device *cma_dev; 3315 3316 cma_dev = ib_get_client_data(device, &cma_client); 3317 if (!cma_dev) 3318 return; 3319 3320 mutex_lock(&lock); 3321 list_del(&cma_dev->list); 3322 mutex_unlock(&lock); 3323 3324 cma_process_remove(cma_dev); 3325 kfree(cma_dev); 3326 } 3327 3328 static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb) 3329 { 3330 struct nlmsghdr *nlh; 3331 struct rdma_cm_id_stats *id_stats; 3332 struct rdma_id_private *id_priv; 3333 struct rdma_cm_id *id = NULL; 3334 struct cma_device *cma_dev; 3335 int i_dev = 0, i_id = 0; 3336 3337 /* 3338 * We export all of the IDs as a sequence of messages. Each 3339 * ID gets its own netlink message. 3340 */ 3341 mutex_lock(&lock); 3342 3343 list_for_each_entry(cma_dev, &dev_list, list) { 3344 if (i_dev < cb->args[0]) { 3345 i_dev++; 3346 continue; 3347 } 3348 3349 i_id = 0; 3350 list_for_each_entry(id_priv, &cma_dev->id_list, list) { 3351 if (i_id < cb->args[1]) { 3352 i_id++; 3353 continue; 3354 } 3355 3356 id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq, 3357 sizeof *id_stats, RDMA_NL_RDMA_CM, 3358 RDMA_NL_RDMA_CM_ID_STATS); 3359 if (!id_stats) 3360 goto out; 3361 3362 memset(id_stats, 0, sizeof *id_stats); 3363 id = &id_priv->id; 3364 id_stats->node_type = id->route.addr.dev_addr.dev_type; 3365 id_stats->port_num = id->port_num; 3366 id_stats->bound_dev_if = 3367 id->route.addr.dev_addr.bound_dev_if; 3368 3369 if (id->route.addr.src_addr.ss_family == AF_INET) { 3370 if (ibnl_put_attr(skb, nlh, 3371 sizeof(struct sockaddr_in), 3372 &id->route.addr.src_addr, 3373 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR)) { 3374 goto out; 3375 } 3376 if (ibnl_put_attr(skb, nlh, 3377 sizeof(struct sockaddr_in), 3378 &id->route.addr.dst_addr, 3379 RDMA_NL_RDMA_CM_ATTR_DST_ADDR)) { 3380 goto out; 3381 } 3382 } else if (id->route.addr.src_addr.ss_family == AF_INET6) { 3383 if (ibnl_put_attr(skb, nlh, 3384 sizeof(struct sockaddr_in6), 3385 &id->route.addr.src_addr, 3386 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR)) { 3387 goto out; 3388 } 3389 if (ibnl_put_attr(skb, nlh, 3390 sizeof(struct sockaddr_in6), 3391 &id->route.addr.dst_addr, 3392 RDMA_NL_RDMA_CM_ATTR_DST_ADDR)) { 3393 goto out; 3394 } 3395 } 3396 3397 id_stats->pid = id_priv->owner; 3398 id_stats->port_space = id->ps; 3399 id_stats->cm_state = id_priv->state; 3400 id_stats->qp_num = id_priv->qp_num; 3401 id_stats->qp_type = id->qp_type; 3402 3403 i_id++; 3404 } 3405 3406 cb->args[1] = 0; 3407 i_dev++; 3408 } 3409 3410 out: 3411 mutex_unlock(&lock); 3412 cb->args[0] = i_dev; 3413 cb->args[1] = i_id; 3414 3415 return skb->len; 3416 } 3417 3418 static const struct ibnl_client_cbs cma_cb_table[] = { 3419 [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats }, 3420 }; 3421 3422 static int __init cma_init(void) 3423 { 3424 int ret; 3425 3426 cma_wq = create_singlethread_workqueue("rdma_cm"); 3427 if (!cma_wq) 3428 return -ENOMEM; 3429 3430 ib_sa_register_client(&sa_client); 3431 rdma_addr_register_client(&addr_client); 3432 register_netdevice_notifier(&cma_nb); 3433 3434 ret = ib_register_client(&cma_client); 3435 if (ret) 3436 goto err; 3437 3438 if (ibnl_add_client(RDMA_NL_RDMA_CM, RDMA_NL_RDMA_CM_NUM_OPS, cma_cb_table)) 3439 printk(KERN_WARNING "RDMA CMA: failed to add netlink callback\n"); 3440 3441 return 0; 3442 3443 err: 3444 unregister_netdevice_notifier(&cma_nb); 3445 rdma_addr_unregister_client(&addr_client); 3446 ib_sa_unregister_client(&sa_client); 3447 destroy_workqueue(cma_wq); 3448 return ret; 3449 } 3450 3451 static void __exit cma_cleanup(void) 3452 { 3453 ibnl_remove_client(RDMA_NL_RDMA_CM); 3454 ib_unregister_client(&cma_client); 3455 unregister_netdevice_notifier(&cma_nb); 3456 rdma_addr_unregister_client(&addr_client); 3457 ib_sa_unregister_client(&sa_client); 3458 destroy_workqueue(cma_wq); 3459 idr_destroy(&sdp_ps); 3460 idr_destroy(&tcp_ps); 3461 idr_destroy(&udp_ps); 3462 idr_destroy(&ipoib_ps); 3463 } 3464 3465 module_init(cma_init); 3466 module_exit(cma_cleanup); 3467