1 /* 2 * Copyright (c) 2005 Voltaire Inc. All rights reserved. 3 * Copyright (c) 2002-2005, Network Appliance, Inc. All rights reserved. 4 * Copyright (c) 1999-2005, Mellanox Technologies, Inc. All rights reserved. 5 * Copyright (c) 2005-2006 Intel Corporation. All rights reserved. 6 * 7 * This software is available to you under a choice of one of two 8 * licenses. You may choose to be licensed under the terms of the GNU 9 * General Public License (GPL) Version 2, available from the file 10 * COPYING in the main directory of this source tree, or the 11 * OpenIB.org BSD license below: 12 * 13 * Redistribution and use in source and binary forms, with or 14 * without modification, are permitted provided that the following 15 * conditions are met: 16 * 17 * - Redistributions of source code must retain the above 18 * copyright notice, this list of conditions and the following 19 * disclaimer. 20 * 21 * - Redistributions in binary form must reproduce the above 22 * copyright notice, this list of conditions and the following 23 * disclaimer in the documentation and/or other materials 24 * provided with the distribution. 25 * 26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 33 * SOFTWARE. 34 */ 35 36 #include <linux/completion.h> 37 #include <linux/in.h> 38 #include <linux/in6.h> 39 #include <linux/mutex.h> 40 #include <linux/random.h> 41 #include <linux/idr.h> 42 #include <linux/inetdevice.h> 43 #include <linux/slab.h> 44 #include <linux/module.h> 45 #include <net/route.h> 46 47 #include <net/tcp.h> 48 #include <net/ipv6.h> 49 50 #include <rdma/rdma_cm.h> 51 #include <rdma/rdma_cm_ib.h> 52 #include <rdma/rdma_netlink.h> 53 #include <rdma/ib_cache.h> 54 #include <rdma/ib_cm.h> 55 #include <rdma/ib_sa.h> 56 #include <rdma/iw_cm.h> 57 58 MODULE_AUTHOR("Sean Hefty"); 59 MODULE_DESCRIPTION("Generic RDMA CM Agent"); 60 MODULE_LICENSE("Dual BSD/GPL"); 61 62 #define CMA_CM_RESPONSE_TIMEOUT 20 63 #define CMA_MAX_CM_RETRIES 15 64 #define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24) 65 #define CMA_IBOE_PACKET_LIFETIME 18 66 67 static void cma_add_one(struct ib_device *device); 68 static void cma_remove_one(struct ib_device *device); 69 70 static struct ib_client cma_client = { 71 .name = "cma", 72 .add = cma_add_one, 73 .remove = cma_remove_one 74 }; 75 76 static struct ib_sa_client sa_client; 77 static struct rdma_addr_client addr_client; 78 static LIST_HEAD(dev_list); 79 static LIST_HEAD(listen_any_list); 80 static DEFINE_MUTEX(lock); 81 static struct workqueue_struct *cma_wq; 82 static DEFINE_IDR(sdp_ps); 83 static DEFINE_IDR(tcp_ps); 84 static DEFINE_IDR(udp_ps); 85 static DEFINE_IDR(ipoib_ps); 86 static DEFINE_IDR(ib_ps); 87 88 struct cma_device { 89 struct list_head list; 90 struct ib_device *device; 91 struct completion comp; 92 atomic_t refcount; 93 struct list_head id_list; 94 }; 95 96 struct rdma_bind_list { 97 struct idr *ps; 98 struct hlist_head owners; 99 unsigned short port; 100 }; 101 102 /* 103 * Device removal can occur at anytime, so we need extra handling to 104 * serialize notifying the user of device removal with other callbacks. 105 * We do this by disabling removal notification while a callback is in process, 106 * and reporting it after the callback completes. 107 */ 108 struct rdma_id_private { 109 struct rdma_cm_id id; 110 111 struct rdma_bind_list *bind_list; 112 struct hlist_node node; 113 struct list_head list; /* listen_any_list or cma_device.list */ 114 struct list_head listen_list; /* per device listens */ 115 struct cma_device *cma_dev; 116 struct list_head mc_list; 117 118 int internal_id; 119 enum rdma_cm_state state; 120 spinlock_t lock; 121 struct mutex qp_mutex; 122 123 struct completion comp; 124 atomic_t refcount; 125 struct mutex handler_mutex; 126 127 int backlog; 128 int timeout_ms; 129 struct ib_sa_query *query; 130 int query_id; 131 union { 132 struct ib_cm_id *ib; 133 struct iw_cm_id *iw; 134 } cm_id; 135 136 u32 seq_num; 137 u32 qkey; 138 u32 qp_num; 139 pid_t owner; 140 u8 srq; 141 u8 tos; 142 u8 reuseaddr; 143 }; 144 145 struct cma_multicast { 146 struct rdma_id_private *id_priv; 147 union { 148 struct ib_sa_multicast *ib; 149 } multicast; 150 struct list_head list; 151 void *context; 152 struct sockaddr_storage addr; 153 struct kref mcref; 154 }; 155 156 struct cma_work { 157 struct work_struct work; 158 struct rdma_id_private *id; 159 enum rdma_cm_state old_state; 160 enum rdma_cm_state new_state; 161 struct rdma_cm_event event; 162 }; 163 164 struct cma_ndev_work { 165 struct work_struct work; 166 struct rdma_id_private *id; 167 struct rdma_cm_event event; 168 }; 169 170 struct iboe_mcast_work { 171 struct work_struct work; 172 struct rdma_id_private *id; 173 struct cma_multicast *mc; 174 }; 175 176 union cma_ip_addr { 177 struct in6_addr ip6; 178 struct { 179 __be32 pad[3]; 180 __be32 addr; 181 } ip4; 182 }; 183 184 struct cma_hdr { 185 u8 cma_version; 186 u8 ip_version; /* IP version: 7:4 */ 187 __be16 port; 188 union cma_ip_addr src_addr; 189 union cma_ip_addr dst_addr; 190 }; 191 192 struct sdp_hh { 193 u8 bsdh[16]; 194 u8 sdp_version; /* Major version: 7:4 */ 195 u8 ip_version; /* IP version: 7:4 */ 196 u8 sdp_specific1[10]; 197 __be16 port; 198 __be16 sdp_specific2; 199 union cma_ip_addr src_addr; 200 union cma_ip_addr dst_addr; 201 }; 202 203 struct sdp_hah { 204 u8 bsdh[16]; 205 u8 sdp_version; 206 }; 207 208 #define CMA_VERSION 0x00 209 #define SDP_MAJ_VERSION 0x2 210 211 static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp) 212 { 213 unsigned long flags; 214 int ret; 215 216 spin_lock_irqsave(&id_priv->lock, flags); 217 ret = (id_priv->state == comp); 218 spin_unlock_irqrestore(&id_priv->lock, flags); 219 return ret; 220 } 221 222 static int cma_comp_exch(struct rdma_id_private *id_priv, 223 enum rdma_cm_state comp, enum rdma_cm_state exch) 224 { 225 unsigned long flags; 226 int ret; 227 228 spin_lock_irqsave(&id_priv->lock, flags); 229 if ((ret = (id_priv->state == comp))) 230 id_priv->state = exch; 231 spin_unlock_irqrestore(&id_priv->lock, flags); 232 return ret; 233 } 234 235 static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv, 236 enum rdma_cm_state exch) 237 { 238 unsigned long flags; 239 enum rdma_cm_state old; 240 241 spin_lock_irqsave(&id_priv->lock, flags); 242 old = id_priv->state; 243 id_priv->state = exch; 244 spin_unlock_irqrestore(&id_priv->lock, flags); 245 return old; 246 } 247 248 static inline u8 cma_get_ip_ver(struct cma_hdr *hdr) 249 { 250 return hdr->ip_version >> 4; 251 } 252 253 static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver) 254 { 255 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF); 256 } 257 258 static inline u8 sdp_get_majv(u8 sdp_version) 259 { 260 return sdp_version >> 4; 261 } 262 263 static inline u8 sdp_get_ip_ver(struct sdp_hh *hh) 264 { 265 return hh->ip_version >> 4; 266 } 267 268 static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver) 269 { 270 hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF); 271 } 272 273 static void cma_attach_to_dev(struct rdma_id_private *id_priv, 274 struct cma_device *cma_dev) 275 { 276 atomic_inc(&cma_dev->refcount); 277 id_priv->cma_dev = cma_dev; 278 id_priv->id.device = cma_dev->device; 279 id_priv->id.route.addr.dev_addr.transport = 280 rdma_node_get_transport(cma_dev->device->node_type); 281 list_add_tail(&id_priv->list, &cma_dev->id_list); 282 } 283 284 static inline void cma_deref_dev(struct cma_device *cma_dev) 285 { 286 if (atomic_dec_and_test(&cma_dev->refcount)) 287 complete(&cma_dev->comp); 288 } 289 290 static inline void release_mc(struct kref *kref) 291 { 292 struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref); 293 294 kfree(mc->multicast.ib); 295 kfree(mc); 296 } 297 298 static void cma_release_dev(struct rdma_id_private *id_priv) 299 { 300 mutex_lock(&lock); 301 list_del(&id_priv->list); 302 cma_deref_dev(id_priv->cma_dev); 303 id_priv->cma_dev = NULL; 304 mutex_unlock(&lock); 305 } 306 307 static int cma_set_qkey(struct rdma_id_private *id_priv) 308 { 309 struct ib_sa_mcmember_rec rec; 310 int ret = 0; 311 312 if (id_priv->qkey) 313 return 0; 314 315 switch (id_priv->id.ps) { 316 case RDMA_PS_UDP: 317 id_priv->qkey = RDMA_UDP_QKEY; 318 break; 319 case RDMA_PS_IPOIB: 320 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid); 321 ret = ib_sa_get_mcmember_rec(id_priv->id.device, 322 id_priv->id.port_num, &rec.mgid, 323 &rec); 324 if (!ret) 325 id_priv->qkey = be32_to_cpu(rec.qkey); 326 break; 327 default: 328 break; 329 } 330 return ret; 331 } 332 333 static int find_gid_port(struct ib_device *device, union ib_gid *gid, u8 port_num) 334 { 335 int i; 336 int err; 337 struct ib_port_attr props; 338 union ib_gid tmp; 339 340 err = ib_query_port(device, port_num, &props); 341 if (err) 342 return 1; 343 344 for (i = 0; i < props.gid_tbl_len; ++i) { 345 err = ib_query_gid(device, port_num, i, &tmp); 346 if (err) 347 return 1; 348 if (!memcmp(&tmp, gid, sizeof tmp)) 349 return 0; 350 } 351 352 return -EAGAIN; 353 } 354 355 static int cma_acquire_dev(struct rdma_id_private *id_priv) 356 { 357 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 358 struct cma_device *cma_dev; 359 union ib_gid gid, iboe_gid; 360 int ret = -ENODEV; 361 u8 port; 362 enum rdma_link_layer dev_ll = dev_addr->dev_type == ARPHRD_INFINIBAND ? 363 IB_LINK_LAYER_INFINIBAND : IB_LINK_LAYER_ETHERNET; 364 365 if (dev_ll != IB_LINK_LAYER_INFINIBAND && 366 id_priv->id.ps == RDMA_PS_IPOIB) 367 return -EINVAL; 368 369 mutex_lock(&lock); 370 iboe_addr_get_sgid(dev_addr, &iboe_gid); 371 memcpy(&gid, dev_addr->src_dev_addr + 372 rdma_addr_gid_offset(dev_addr), sizeof gid); 373 list_for_each_entry(cma_dev, &dev_list, list) { 374 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) { 375 if (rdma_port_get_link_layer(cma_dev->device, port) == dev_ll) { 376 if (rdma_node_get_transport(cma_dev->device->node_type) == RDMA_TRANSPORT_IB && 377 rdma_port_get_link_layer(cma_dev->device, port) == IB_LINK_LAYER_ETHERNET) 378 ret = find_gid_port(cma_dev->device, &iboe_gid, port); 379 else 380 ret = find_gid_port(cma_dev->device, &gid, port); 381 382 if (!ret) { 383 id_priv->id.port_num = port; 384 goto out; 385 } else if (ret == 1) 386 break; 387 } 388 } 389 } 390 391 out: 392 if (!ret) 393 cma_attach_to_dev(id_priv, cma_dev); 394 395 mutex_unlock(&lock); 396 return ret; 397 } 398 399 static void cma_deref_id(struct rdma_id_private *id_priv) 400 { 401 if (atomic_dec_and_test(&id_priv->refcount)) 402 complete(&id_priv->comp); 403 } 404 405 static int cma_disable_callback(struct rdma_id_private *id_priv, 406 enum rdma_cm_state state) 407 { 408 mutex_lock(&id_priv->handler_mutex); 409 if (id_priv->state != state) { 410 mutex_unlock(&id_priv->handler_mutex); 411 return -EINVAL; 412 } 413 return 0; 414 } 415 416 struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler, 417 void *context, enum rdma_port_space ps, 418 enum ib_qp_type qp_type) 419 { 420 struct rdma_id_private *id_priv; 421 422 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL); 423 if (!id_priv) 424 return ERR_PTR(-ENOMEM); 425 426 id_priv->owner = task_pid_nr(current); 427 id_priv->state = RDMA_CM_IDLE; 428 id_priv->id.context = context; 429 id_priv->id.event_handler = event_handler; 430 id_priv->id.ps = ps; 431 id_priv->id.qp_type = qp_type; 432 spin_lock_init(&id_priv->lock); 433 mutex_init(&id_priv->qp_mutex); 434 init_completion(&id_priv->comp); 435 atomic_set(&id_priv->refcount, 1); 436 mutex_init(&id_priv->handler_mutex); 437 INIT_LIST_HEAD(&id_priv->listen_list); 438 INIT_LIST_HEAD(&id_priv->mc_list); 439 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num); 440 441 return &id_priv->id; 442 } 443 EXPORT_SYMBOL(rdma_create_id); 444 445 static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp) 446 { 447 struct ib_qp_attr qp_attr; 448 int qp_attr_mask, ret; 449 450 qp_attr.qp_state = IB_QPS_INIT; 451 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 452 if (ret) 453 return ret; 454 455 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); 456 if (ret) 457 return ret; 458 459 qp_attr.qp_state = IB_QPS_RTR; 460 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE); 461 if (ret) 462 return ret; 463 464 qp_attr.qp_state = IB_QPS_RTS; 465 qp_attr.sq_psn = 0; 466 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN); 467 468 return ret; 469 } 470 471 static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp) 472 { 473 struct ib_qp_attr qp_attr; 474 int qp_attr_mask, ret; 475 476 qp_attr.qp_state = IB_QPS_INIT; 477 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 478 if (ret) 479 return ret; 480 481 return ib_modify_qp(qp, &qp_attr, qp_attr_mask); 482 } 483 484 int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd, 485 struct ib_qp_init_attr *qp_init_attr) 486 { 487 struct rdma_id_private *id_priv; 488 struct ib_qp *qp; 489 int ret; 490 491 id_priv = container_of(id, struct rdma_id_private, id); 492 if (id->device != pd->device) 493 return -EINVAL; 494 495 qp = ib_create_qp(pd, qp_init_attr); 496 if (IS_ERR(qp)) 497 return PTR_ERR(qp); 498 499 if (id->qp_type == IB_QPT_UD) 500 ret = cma_init_ud_qp(id_priv, qp); 501 else 502 ret = cma_init_conn_qp(id_priv, qp); 503 if (ret) 504 goto err; 505 506 id->qp = qp; 507 id_priv->qp_num = qp->qp_num; 508 id_priv->srq = (qp->srq != NULL); 509 return 0; 510 err: 511 ib_destroy_qp(qp); 512 return ret; 513 } 514 EXPORT_SYMBOL(rdma_create_qp); 515 516 void rdma_destroy_qp(struct rdma_cm_id *id) 517 { 518 struct rdma_id_private *id_priv; 519 520 id_priv = container_of(id, struct rdma_id_private, id); 521 mutex_lock(&id_priv->qp_mutex); 522 ib_destroy_qp(id_priv->id.qp); 523 id_priv->id.qp = NULL; 524 mutex_unlock(&id_priv->qp_mutex); 525 } 526 EXPORT_SYMBOL(rdma_destroy_qp); 527 528 static int cma_modify_qp_rtr(struct rdma_id_private *id_priv, 529 struct rdma_conn_param *conn_param) 530 { 531 struct ib_qp_attr qp_attr; 532 int qp_attr_mask, ret; 533 534 mutex_lock(&id_priv->qp_mutex); 535 if (!id_priv->id.qp) { 536 ret = 0; 537 goto out; 538 } 539 540 /* Need to update QP attributes from default values. */ 541 qp_attr.qp_state = IB_QPS_INIT; 542 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 543 if (ret) 544 goto out; 545 546 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); 547 if (ret) 548 goto out; 549 550 qp_attr.qp_state = IB_QPS_RTR; 551 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 552 if (ret) 553 goto out; 554 555 if (conn_param) 556 qp_attr.max_dest_rd_atomic = conn_param->responder_resources; 557 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); 558 out: 559 mutex_unlock(&id_priv->qp_mutex); 560 return ret; 561 } 562 563 static int cma_modify_qp_rts(struct rdma_id_private *id_priv, 564 struct rdma_conn_param *conn_param) 565 { 566 struct ib_qp_attr qp_attr; 567 int qp_attr_mask, ret; 568 569 mutex_lock(&id_priv->qp_mutex); 570 if (!id_priv->id.qp) { 571 ret = 0; 572 goto out; 573 } 574 575 qp_attr.qp_state = IB_QPS_RTS; 576 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 577 if (ret) 578 goto out; 579 580 if (conn_param) 581 qp_attr.max_rd_atomic = conn_param->initiator_depth; 582 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); 583 out: 584 mutex_unlock(&id_priv->qp_mutex); 585 return ret; 586 } 587 588 static int cma_modify_qp_err(struct rdma_id_private *id_priv) 589 { 590 struct ib_qp_attr qp_attr; 591 int ret; 592 593 mutex_lock(&id_priv->qp_mutex); 594 if (!id_priv->id.qp) { 595 ret = 0; 596 goto out; 597 } 598 599 qp_attr.qp_state = IB_QPS_ERR; 600 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE); 601 out: 602 mutex_unlock(&id_priv->qp_mutex); 603 return ret; 604 } 605 606 static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv, 607 struct ib_qp_attr *qp_attr, int *qp_attr_mask) 608 { 609 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 610 int ret; 611 u16 pkey; 612 613 if (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num) == 614 IB_LINK_LAYER_INFINIBAND) 615 pkey = ib_addr_get_pkey(dev_addr); 616 else 617 pkey = 0xffff; 618 619 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num, 620 pkey, &qp_attr->pkey_index); 621 if (ret) 622 return ret; 623 624 qp_attr->port_num = id_priv->id.port_num; 625 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT; 626 627 if (id_priv->id.qp_type == IB_QPT_UD) { 628 ret = cma_set_qkey(id_priv); 629 if (ret) 630 return ret; 631 632 qp_attr->qkey = id_priv->qkey; 633 *qp_attr_mask |= IB_QP_QKEY; 634 } else { 635 qp_attr->qp_access_flags = 0; 636 *qp_attr_mask |= IB_QP_ACCESS_FLAGS; 637 } 638 return 0; 639 } 640 641 int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr, 642 int *qp_attr_mask) 643 { 644 struct rdma_id_private *id_priv; 645 int ret = 0; 646 647 id_priv = container_of(id, struct rdma_id_private, id); 648 switch (rdma_node_get_transport(id_priv->id.device->node_type)) { 649 case RDMA_TRANSPORT_IB: 650 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD)) 651 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask); 652 else 653 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr, 654 qp_attr_mask); 655 if (qp_attr->qp_state == IB_QPS_RTR) 656 qp_attr->rq_psn = id_priv->seq_num; 657 break; 658 case RDMA_TRANSPORT_IWARP: 659 if (!id_priv->cm_id.iw) { 660 qp_attr->qp_access_flags = 0; 661 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS; 662 } else 663 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr, 664 qp_attr_mask); 665 break; 666 default: 667 ret = -ENOSYS; 668 break; 669 } 670 671 return ret; 672 } 673 EXPORT_SYMBOL(rdma_init_qp_attr); 674 675 static inline int cma_zero_addr(struct sockaddr *addr) 676 { 677 struct in6_addr *ip6; 678 679 if (addr->sa_family == AF_INET) 680 return ipv4_is_zeronet( 681 ((struct sockaddr_in *)addr)->sin_addr.s_addr); 682 else { 683 ip6 = &((struct sockaddr_in6 *) addr)->sin6_addr; 684 return (ip6->s6_addr32[0] | ip6->s6_addr32[1] | 685 ip6->s6_addr32[2] | ip6->s6_addr32[3]) == 0; 686 } 687 } 688 689 static inline int cma_loopback_addr(struct sockaddr *addr) 690 { 691 if (addr->sa_family == AF_INET) 692 return ipv4_is_loopback( 693 ((struct sockaddr_in *) addr)->sin_addr.s_addr); 694 else 695 return ipv6_addr_loopback( 696 &((struct sockaddr_in6 *) addr)->sin6_addr); 697 } 698 699 static inline int cma_any_addr(struct sockaddr *addr) 700 { 701 return cma_zero_addr(addr) || cma_loopback_addr(addr); 702 } 703 704 static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst) 705 { 706 if (src->sa_family != dst->sa_family) 707 return -1; 708 709 switch (src->sa_family) { 710 case AF_INET: 711 return ((struct sockaddr_in *) src)->sin_addr.s_addr != 712 ((struct sockaddr_in *) dst)->sin_addr.s_addr; 713 default: 714 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr, 715 &((struct sockaddr_in6 *) dst)->sin6_addr); 716 } 717 } 718 719 static inline __be16 cma_port(struct sockaddr *addr) 720 { 721 if (addr->sa_family == AF_INET) 722 return ((struct sockaddr_in *) addr)->sin_port; 723 else 724 return ((struct sockaddr_in6 *) addr)->sin6_port; 725 } 726 727 static inline int cma_any_port(struct sockaddr *addr) 728 { 729 return !cma_port(addr); 730 } 731 732 static int cma_get_net_info(void *hdr, enum rdma_port_space ps, 733 u8 *ip_ver, __be16 *port, 734 union cma_ip_addr **src, union cma_ip_addr **dst) 735 { 736 switch (ps) { 737 case RDMA_PS_SDP: 738 if (sdp_get_majv(((struct sdp_hh *) hdr)->sdp_version) != 739 SDP_MAJ_VERSION) 740 return -EINVAL; 741 742 *ip_ver = sdp_get_ip_ver(hdr); 743 *port = ((struct sdp_hh *) hdr)->port; 744 *src = &((struct sdp_hh *) hdr)->src_addr; 745 *dst = &((struct sdp_hh *) hdr)->dst_addr; 746 break; 747 default: 748 if (((struct cma_hdr *) hdr)->cma_version != CMA_VERSION) 749 return -EINVAL; 750 751 *ip_ver = cma_get_ip_ver(hdr); 752 *port = ((struct cma_hdr *) hdr)->port; 753 *src = &((struct cma_hdr *) hdr)->src_addr; 754 *dst = &((struct cma_hdr *) hdr)->dst_addr; 755 break; 756 } 757 758 if (*ip_ver != 4 && *ip_ver != 6) 759 return -EINVAL; 760 return 0; 761 } 762 763 static void cma_save_net_info(struct rdma_addr *addr, 764 struct rdma_addr *listen_addr, 765 u8 ip_ver, __be16 port, 766 union cma_ip_addr *src, union cma_ip_addr *dst) 767 { 768 struct sockaddr_in *listen4, *ip4; 769 struct sockaddr_in6 *listen6, *ip6; 770 771 switch (ip_ver) { 772 case 4: 773 listen4 = (struct sockaddr_in *) &listen_addr->src_addr; 774 ip4 = (struct sockaddr_in *) &addr->src_addr; 775 ip4->sin_family = listen4->sin_family; 776 ip4->sin_addr.s_addr = dst->ip4.addr; 777 ip4->sin_port = listen4->sin_port; 778 779 ip4 = (struct sockaddr_in *) &addr->dst_addr; 780 ip4->sin_family = listen4->sin_family; 781 ip4->sin_addr.s_addr = src->ip4.addr; 782 ip4->sin_port = port; 783 break; 784 case 6: 785 listen6 = (struct sockaddr_in6 *) &listen_addr->src_addr; 786 ip6 = (struct sockaddr_in6 *) &addr->src_addr; 787 ip6->sin6_family = listen6->sin6_family; 788 ip6->sin6_addr = dst->ip6; 789 ip6->sin6_port = listen6->sin6_port; 790 791 ip6 = (struct sockaddr_in6 *) &addr->dst_addr; 792 ip6->sin6_family = listen6->sin6_family; 793 ip6->sin6_addr = src->ip6; 794 ip6->sin6_port = port; 795 break; 796 default: 797 break; 798 } 799 } 800 801 static inline int cma_user_data_offset(enum rdma_port_space ps) 802 { 803 switch (ps) { 804 case RDMA_PS_SDP: 805 return 0; 806 default: 807 return sizeof(struct cma_hdr); 808 } 809 } 810 811 static void cma_cancel_route(struct rdma_id_private *id_priv) 812 { 813 switch (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num)) { 814 case IB_LINK_LAYER_INFINIBAND: 815 if (id_priv->query) 816 ib_sa_cancel_query(id_priv->query_id, id_priv->query); 817 break; 818 default: 819 break; 820 } 821 } 822 823 static void cma_cancel_listens(struct rdma_id_private *id_priv) 824 { 825 struct rdma_id_private *dev_id_priv; 826 827 /* 828 * Remove from listen_any_list to prevent added devices from spawning 829 * additional listen requests. 830 */ 831 mutex_lock(&lock); 832 list_del(&id_priv->list); 833 834 while (!list_empty(&id_priv->listen_list)) { 835 dev_id_priv = list_entry(id_priv->listen_list.next, 836 struct rdma_id_private, listen_list); 837 /* sync with device removal to avoid duplicate destruction */ 838 list_del_init(&dev_id_priv->list); 839 list_del(&dev_id_priv->listen_list); 840 mutex_unlock(&lock); 841 842 rdma_destroy_id(&dev_id_priv->id); 843 mutex_lock(&lock); 844 } 845 mutex_unlock(&lock); 846 } 847 848 static void cma_cancel_operation(struct rdma_id_private *id_priv, 849 enum rdma_cm_state state) 850 { 851 switch (state) { 852 case RDMA_CM_ADDR_QUERY: 853 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr); 854 break; 855 case RDMA_CM_ROUTE_QUERY: 856 cma_cancel_route(id_priv); 857 break; 858 case RDMA_CM_LISTEN: 859 if (cma_any_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr) 860 && !id_priv->cma_dev) 861 cma_cancel_listens(id_priv); 862 break; 863 default: 864 break; 865 } 866 } 867 868 static void cma_release_port(struct rdma_id_private *id_priv) 869 { 870 struct rdma_bind_list *bind_list = id_priv->bind_list; 871 872 if (!bind_list) 873 return; 874 875 mutex_lock(&lock); 876 hlist_del(&id_priv->node); 877 if (hlist_empty(&bind_list->owners)) { 878 idr_remove(bind_list->ps, bind_list->port); 879 kfree(bind_list); 880 } 881 mutex_unlock(&lock); 882 } 883 884 static void cma_leave_mc_groups(struct rdma_id_private *id_priv) 885 { 886 struct cma_multicast *mc; 887 888 while (!list_empty(&id_priv->mc_list)) { 889 mc = container_of(id_priv->mc_list.next, 890 struct cma_multicast, list); 891 list_del(&mc->list); 892 switch (rdma_port_get_link_layer(id_priv->cma_dev->device, id_priv->id.port_num)) { 893 case IB_LINK_LAYER_INFINIBAND: 894 ib_sa_free_multicast(mc->multicast.ib); 895 kfree(mc); 896 break; 897 case IB_LINK_LAYER_ETHERNET: 898 kref_put(&mc->mcref, release_mc); 899 break; 900 default: 901 break; 902 } 903 } 904 } 905 906 void rdma_destroy_id(struct rdma_cm_id *id) 907 { 908 struct rdma_id_private *id_priv; 909 enum rdma_cm_state state; 910 911 id_priv = container_of(id, struct rdma_id_private, id); 912 state = cma_exch(id_priv, RDMA_CM_DESTROYING); 913 cma_cancel_operation(id_priv, state); 914 915 /* 916 * Wait for any active callback to finish. New callbacks will find 917 * the id_priv state set to destroying and abort. 918 */ 919 mutex_lock(&id_priv->handler_mutex); 920 mutex_unlock(&id_priv->handler_mutex); 921 922 if (id_priv->cma_dev) { 923 switch (rdma_node_get_transport(id_priv->id.device->node_type)) { 924 case RDMA_TRANSPORT_IB: 925 if (id_priv->cm_id.ib) 926 ib_destroy_cm_id(id_priv->cm_id.ib); 927 break; 928 case RDMA_TRANSPORT_IWARP: 929 if (id_priv->cm_id.iw) 930 iw_destroy_cm_id(id_priv->cm_id.iw); 931 break; 932 default: 933 break; 934 } 935 cma_leave_mc_groups(id_priv); 936 cma_release_dev(id_priv); 937 } 938 939 cma_release_port(id_priv); 940 cma_deref_id(id_priv); 941 wait_for_completion(&id_priv->comp); 942 943 if (id_priv->internal_id) 944 cma_deref_id(id_priv->id.context); 945 946 kfree(id_priv->id.route.path_rec); 947 kfree(id_priv); 948 } 949 EXPORT_SYMBOL(rdma_destroy_id); 950 951 static int cma_rep_recv(struct rdma_id_private *id_priv) 952 { 953 int ret; 954 955 ret = cma_modify_qp_rtr(id_priv, NULL); 956 if (ret) 957 goto reject; 958 959 ret = cma_modify_qp_rts(id_priv, NULL); 960 if (ret) 961 goto reject; 962 963 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0); 964 if (ret) 965 goto reject; 966 967 return 0; 968 reject: 969 cma_modify_qp_err(id_priv); 970 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED, 971 NULL, 0, NULL, 0); 972 return ret; 973 } 974 975 static int cma_verify_rep(struct rdma_id_private *id_priv, void *data) 976 { 977 if (id_priv->id.ps == RDMA_PS_SDP && 978 sdp_get_majv(((struct sdp_hah *) data)->sdp_version) != 979 SDP_MAJ_VERSION) 980 return -EINVAL; 981 982 return 0; 983 } 984 985 static void cma_set_rep_event_data(struct rdma_cm_event *event, 986 struct ib_cm_rep_event_param *rep_data, 987 void *private_data) 988 { 989 event->param.conn.private_data = private_data; 990 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE; 991 event->param.conn.responder_resources = rep_data->responder_resources; 992 event->param.conn.initiator_depth = rep_data->initiator_depth; 993 event->param.conn.flow_control = rep_data->flow_control; 994 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count; 995 event->param.conn.srq = rep_data->srq; 996 event->param.conn.qp_num = rep_data->remote_qpn; 997 } 998 999 static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) 1000 { 1001 struct rdma_id_private *id_priv = cm_id->context; 1002 struct rdma_cm_event event; 1003 int ret = 0; 1004 1005 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT && 1006 cma_disable_callback(id_priv, RDMA_CM_CONNECT)) || 1007 (ib_event->event == IB_CM_TIMEWAIT_EXIT && 1008 cma_disable_callback(id_priv, RDMA_CM_DISCONNECT))) 1009 return 0; 1010 1011 memset(&event, 0, sizeof event); 1012 switch (ib_event->event) { 1013 case IB_CM_REQ_ERROR: 1014 case IB_CM_REP_ERROR: 1015 event.event = RDMA_CM_EVENT_UNREACHABLE; 1016 event.status = -ETIMEDOUT; 1017 break; 1018 case IB_CM_REP_RECEIVED: 1019 event.status = cma_verify_rep(id_priv, ib_event->private_data); 1020 if (event.status) 1021 event.event = RDMA_CM_EVENT_CONNECT_ERROR; 1022 else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) { 1023 event.status = cma_rep_recv(id_priv); 1024 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR : 1025 RDMA_CM_EVENT_ESTABLISHED; 1026 } else 1027 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE; 1028 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd, 1029 ib_event->private_data); 1030 break; 1031 case IB_CM_RTU_RECEIVED: 1032 case IB_CM_USER_ESTABLISHED: 1033 event.event = RDMA_CM_EVENT_ESTABLISHED; 1034 break; 1035 case IB_CM_DREQ_ERROR: 1036 event.status = -ETIMEDOUT; /* fall through */ 1037 case IB_CM_DREQ_RECEIVED: 1038 case IB_CM_DREP_RECEIVED: 1039 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT, 1040 RDMA_CM_DISCONNECT)) 1041 goto out; 1042 event.event = RDMA_CM_EVENT_DISCONNECTED; 1043 break; 1044 case IB_CM_TIMEWAIT_EXIT: 1045 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT; 1046 break; 1047 case IB_CM_MRA_RECEIVED: 1048 /* ignore event */ 1049 goto out; 1050 case IB_CM_REJ_RECEIVED: 1051 cma_modify_qp_err(id_priv); 1052 event.status = ib_event->param.rej_rcvd.reason; 1053 event.event = RDMA_CM_EVENT_REJECTED; 1054 event.param.conn.private_data = ib_event->private_data; 1055 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE; 1056 break; 1057 default: 1058 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n", 1059 ib_event->event); 1060 goto out; 1061 } 1062 1063 ret = id_priv->id.event_handler(&id_priv->id, &event); 1064 if (ret) { 1065 /* Destroy the CM ID by returning a non-zero value. */ 1066 id_priv->cm_id.ib = NULL; 1067 cma_exch(id_priv, RDMA_CM_DESTROYING); 1068 mutex_unlock(&id_priv->handler_mutex); 1069 rdma_destroy_id(&id_priv->id); 1070 return ret; 1071 } 1072 out: 1073 mutex_unlock(&id_priv->handler_mutex); 1074 return ret; 1075 } 1076 1077 static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id, 1078 struct ib_cm_event *ib_event) 1079 { 1080 struct rdma_id_private *id_priv; 1081 struct rdma_cm_id *id; 1082 struct rdma_route *rt; 1083 union cma_ip_addr *src, *dst; 1084 __be16 port; 1085 u8 ip_ver; 1086 int ret; 1087 1088 if (cma_get_net_info(ib_event->private_data, listen_id->ps, 1089 &ip_ver, &port, &src, &dst)) 1090 return NULL; 1091 1092 id = rdma_create_id(listen_id->event_handler, listen_id->context, 1093 listen_id->ps, ib_event->param.req_rcvd.qp_type); 1094 if (IS_ERR(id)) 1095 return NULL; 1096 1097 cma_save_net_info(&id->route.addr, &listen_id->route.addr, 1098 ip_ver, port, src, dst); 1099 1100 rt = &id->route; 1101 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1; 1102 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths, 1103 GFP_KERNEL); 1104 if (!rt->path_rec) 1105 goto err; 1106 1107 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path; 1108 if (rt->num_paths == 2) 1109 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path; 1110 1111 if (cma_any_addr((struct sockaddr *) &rt->addr.src_addr)) { 1112 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND; 1113 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid); 1114 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey)); 1115 } else { 1116 ret = rdma_translate_ip((struct sockaddr *) &rt->addr.src_addr, 1117 &rt->addr.dev_addr); 1118 if (ret) 1119 goto err; 1120 } 1121 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid); 1122 1123 id_priv = container_of(id, struct rdma_id_private, id); 1124 id_priv->state = RDMA_CM_CONNECT; 1125 return id_priv; 1126 1127 err: 1128 rdma_destroy_id(id); 1129 return NULL; 1130 } 1131 1132 static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id, 1133 struct ib_cm_event *ib_event) 1134 { 1135 struct rdma_id_private *id_priv; 1136 struct rdma_cm_id *id; 1137 union cma_ip_addr *src, *dst; 1138 __be16 port; 1139 u8 ip_ver; 1140 int ret; 1141 1142 id = rdma_create_id(listen_id->event_handler, listen_id->context, 1143 listen_id->ps, IB_QPT_UD); 1144 if (IS_ERR(id)) 1145 return NULL; 1146 1147 1148 if (cma_get_net_info(ib_event->private_data, listen_id->ps, 1149 &ip_ver, &port, &src, &dst)) 1150 goto err; 1151 1152 cma_save_net_info(&id->route.addr, &listen_id->route.addr, 1153 ip_ver, port, src, dst); 1154 1155 if (!cma_any_addr((struct sockaddr *) &id->route.addr.src_addr)) { 1156 ret = rdma_translate_ip((struct sockaddr *) &id->route.addr.src_addr, 1157 &id->route.addr.dev_addr); 1158 if (ret) 1159 goto err; 1160 } 1161 1162 id_priv = container_of(id, struct rdma_id_private, id); 1163 id_priv->state = RDMA_CM_CONNECT; 1164 return id_priv; 1165 err: 1166 rdma_destroy_id(id); 1167 return NULL; 1168 } 1169 1170 static void cma_set_req_event_data(struct rdma_cm_event *event, 1171 struct ib_cm_req_event_param *req_data, 1172 void *private_data, int offset) 1173 { 1174 event->param.conn.private_data = private_data + offset; 1175 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset; 1176 event->param.conn.responder_resources = req_data->responder_resources; 1177 event->param.conn.initiator_depth = req_data->initiator_depth; 1178 event->param.conn.flow_control = req_data->flow_control; 1179 event->param.conn.retry_count = req_data->retry_count; 1180 event->param.conn.rnr_retry_count = req_data->rnr_retry_count; 1181 event->param.conn.srq = req_data->srq; 1182 event->param.conn.qp_num = req_data->remote_qpn; 1183 } 1184 1185 static int cma_check_req_qp_type(struct rdma_cm_id *id, struct ib_cm_event *ib_event) 1186 { 1187 return (((ib_event->event == IB_CM_REQ_RECEIVED) && 1188 (ib_event->param.req_rcvd.qp_type == id->qp_type)) || 1189 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) && 1190 (id->qp_type == IB_QPT_UD)) || 1191 (!id->qp_type)); 1192 } 1193 1194 static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) 1195 { 1196 struct rdma_id_private *listen_id, *conn_id; 1197 struct rdma_cm_event event; 1198 int offset, ret; 1199 1200 listen_id = cm_id->context; 1201 if (!cma_check_req_qp_type(&listen_id->id, ib_event)) 1202 return -EINVAL; 1203 1204 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN)) 1205 return -ECONNABORTED; 1206 1207 memset(&event, 0, sizeof event); 1208 offset = cma_user_data_offset(listen_id->id.ps); 1209 event.event = RDMA_CM_EVENT_CONNECT_REQUEST; 1210 if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) { 1211 conn_id = cma_new_udp_id(&listen_id->id, ib_event); 1212 event.param.ud.private_data = ib_event->private_data + offset; 1213 event.param.ud.private_data_len = 1214 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset; 1215 } else { 1216 conn_id = cma_new_conn_id(&listen_id->id, ib_event); 1217 cma_set_req_event_data(&event, &ib_event->param.req_rcvd, 1218 ib_event->private_data, offset); 1219 } 1220 if (!conn_id) { 1221 ret = -ENOMEM; 1222 goto err1; 1223 } 1224 1225 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING); 1226 ret = cma_acquire_dev(conn_id); 1227 if (ret) 1228 goto err2; 1229 1230 conn_id->cm_id.ib = cm_id; 1231 cm_id->context = conn_id; 1232 cm_id->cm_handler = cma_ib_handler; 1233 1234 /* 1235 * Protect against the user destroying conn_id from another thread 1236 * until we're done accessing it. 1237 */ 1238 atomic_inc(&conn_id->refcount); 1239 ret = conn_id->id.event_handler(&conn_id->id, &event); 1240 if (ret) 1241 goto err3; 1242 1243 /* 1244 * Acquire mutex to prevent user executing rdma_destroy_id() 1245 * while we're accessing the cm_id. 1246 */ 1247 mutex_lock(&lock); 1248 if (cma_comp(conn_id, RDMA_CM_CONNECT) && (conn_id->id.qp_type != IB_QPT_UD)) 1249 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0); 1250 mutex_unlock(&lock); 1251 mutex_unlock(&conn_id->handler_mutex); 1252 mutex_unlock(&listen_id->handler_mutex); 1253 cma_deref_id(conn_id); 1254 return 0; 1255 1256 err3: 1257 cma_deref_id(conn_id); 1258 /* Destroy the CM ID by returning a non-zero value. */ 1259 conn_id->cm_id.ib = NULL; 1260 err2: 1261 cma_exch(conn_id, RDMA_CM_DESTROYING); 1262 mutex_unlock(&conn_id->handler_mutex); 1263 err1: 1264 mutex_unlock(&listen_id->handler_mutex); 1265 if (conn_id) 1266 rdma_destroy_id(&conn_id->id); 1267 return ret; 1268 } 1269 1270 static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr) 1271 { 1272 return cpu_to_be64(((u64)ps << 16) + be16_to_cpu(cma_port(addr))); 1273 } 1274 1275 static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr, 1276 struct ib_cm_compare_data *compare) 1277 { 1278 struct cma_hdr *cma_data, *cma_mask; 1279 struct sdp_hh *sdp_data, *sdp_mask; 1280 __be32 ip4_addr; 1281 struct in6_addr ip6_addr; 1282 1283 memset(compare, 0, sizeof *compare); 1284 cma_data = (void *) compare->data; 1285 cma_mask = (void *) compare->mask; 1286 sdp_data = (void *) compare->data; 1287 sdp_mask = (void *) compare->mask; 1288 1289 switch (addr->sa_family) { 1290 case AF_INET: 1291 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr; 1292 if (ps == RDMA_PS_SDP) { 1293 sdp_set_ip_ver(sdp_data, 4); 1294 sdp_set_ip_ver(sdp_mask, 0xF); 1295 sdp_data->dst_addr.ip4.addr = ip4_addr; 1296 sdp_mask->dst_addr.ip4.addr = htonl(~0); 1297 } else { 1298 cma_set_ip_ver(cma_data, 4); 1299 cma_set_ip_ver(cma_mask, 0xF); 1300 cma_data->dst_addr.ip4.addr = ip4_addr; 1301 cma_mask->dst_addr.ip4.addr = htonl(~0); 1302 } 1303 break; 1304 case AF_INET6: 1305 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr; 1306 if (ps == RDMA_PS_SDP) { 1307 sdp_set_ip_ver(sdp_data, 6); 1308 sdp_set_ip_ver(sdp_mask, 0xF); 1309 sdp_data->dst_addr.ip6 = ip6_addr; 1310 memset(&sdp_mask->dst_addr.ip6, 0xFF, 1311 sizeof sdp_mask->dst_addr.ip6); 1312 } else { 1313 cma_set_ip_ver(cma_data, 6); 1314 cma_set_ip_ver(cma_mask, 0xF); 1315 cma_data->dst_addr.ip6 = ip6_addr; 1316 memset(&cma_mask->dst_addr.ip6, 0xFF, 1317 sizeof cma_mask->dst_addr.ip6); 1318 } 1319 break; 1320 default: 1321 break; 1322 } 1323 } 1324 1325 static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event) 1326 { 1327 struct rdma_id_private *id_priv = iw_id->context; 1328 struct rdma_cm_event event; 1329 struct sockaddr_in *sin; 1330 int ret = 0; 1331 1332 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT)) 1333 return 0; 1334 1335 memset(&event, 0, sizeof event); 1336 switch (iw_event->event) { 1337 case IW_CM_EVENT_CLOSE: 1338 event.event = RDMA_CM_EVENT_DISCONNECTED; 1339 break; 1340 case IW_CM_EVENT_CONNECT_REPLY: 1341 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; 1342 *sin = iw_event->local_addr; 1343 sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr; 1344 *sin = iw_event->remote_addr; 1345 switch (iw_event->status) { 1346 case 0: 1347 event.event = RDMA_CM_EVENT_ESTABLISHED; 1348 event.param.conn.initiator_depth = iw_event->ird; 1349 event.param.conn.responder_resources = iw_event->ord; 1350 break; 1351 case -ECONNRESET: 1352 case -ECONNREFUSED: 1353 event.event = RDMA_CM_EVENT_REJECTED; 1354 break; 1355 case -ETIMEDOUT: 1356 event.event = RDMA_CM_EVENT_UNREACHABLE; 1357 break; 1358 default: 1359 event.event = RDMA_CM_EVENT_CONNECT_ERROR; 1360 break; 1361 } 1362 break; 1363 case IW_CM_EVENT_ESTABLISHED: 1364 event.event = RDMA_CM_EVENT_ESTABLISHED; 1365 event.param.conn.initiator_depth = iw_event->ird; 1366 event.param.conn.responder_resources = iw_event->ord; 1367 break; 1368 default: 1369 BUG_ON(1); 1370 } 1371 1372 event.status = iw_event->status; 1373 event.param.conn.private_data = iw_event->private_data; 1374 event.param.conn.private_data_len = iw_event->private_data_len; 1375 ret = id_priv->id.event_handler(&id_priv->id, &event); 1376 if (ret) { 1377 /* Destroy the CM ID by returning a non-zero value. */ 1378 id_priv->cm_id.iw = NULL; 1379 cma_exch(id_priv, RDMA_CM_DESTROYING); 1380 mutex_unlock(&id_priv->handler_mutex); 1381 rdma_destroy_id(&id_priv->id); 1382 return ret; 1383 } 1384 1385 mutex_unlock(&id_priv->handler_mutex); 1386 return ret; 1387 } 1388 1389 static int iw_conn_req_handler(struct iw_cm_id *cm_id, 1390 struct iw_cm_event *iw_event) 1391 { 1392 struct rdma_cm_id *new_cm_id; 1393 struct rdma_id_private *listen_id, *conn_id; 1394 struct sockaddr_in *sin; 1395 struct net_device *dev = NULL; 1396 struct rdma_cm_event event; 1397 int ret; 1398 struct ib_device_attr attr; 1399 1400 listen_id = cm_id->context; 1401 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN)) 1402 return -ECONNABORTED; 1403 1404 /* Create a new RDMA id for the new IW CM ID */ 1405 new_cm_id = rdma_create_id(listen_id->id.event_handler, 1406 listen_id->id.context, 1407 RDMA_PS_TCP, IB_QPT_RC); 1408 if (IS_ERR(new_cm_id)) { 1409 ret = -ENOMEM; 1410 goto out; 1411 } 1412 conn_id = container_of(new_cm_id, struct rdma_id_private, id); 1413 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING); 1414 conn_id->state = RDMA_CM_CONNECT; 1415 1416 dev = ip_dev_find(&init_net, iw_event->local_addr.sin_addr.s_addr); 1417 if (!dev) { 1418 ret = -EADDRNOTAVAIL; 1419 mutex_unlock(&conn_id->handler_mutex); 1420 rdma_destroy_id(new_cm_id); 1421 goto out; 1422 } 1423 ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL); 1424 if (ret) { 1425 mutex_unlock(&conn_id->handler_mutex); 1426 rdma_destroy_id(new_cm_id); 1427 goto out; 1428 } 1429 1430 ret = cma_acquire_dev(conn_id); 1431 if (ret) { 1432 mutex_unlock(&conn_id->handler_mutex); 1433 rdma_destroy_id(new_cm_id); 1434 goto out; 1435 } 1436 1437 conn_id->cm_id.iw = cm_id; 1438 cm_id->context = conn_id; 1439 cm_id->cm_handler = cma_iw_handler; 1440 1441 sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr; 1442 *sin = iw_event->local_addr; 1443 sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr; 1444 *sin = iw_event->remote_addr; 1445 1446 ret = ib_query_device(conn_id->id.device, &attr); 1447 if (ret) { 1448 mutex_unlock(&conn_id->handler_mutex); 1449 rdma_destroy_id(new_cm_id); 1450 goto out; 1451 } 1452 1453 memset(&event, 0, sizeof event); 1454 event.event = RDMA_CM_EVENT_CONNECT_REQUEST; 1455 event.param.conn.private_data = iw_event->private_data; 1456 event.param.conn.private_data_len = iw_event->private_data_len; 1457 event.param.conn.initiator_depth = iw_event->ird; 1458 event.param.conn.responder_resources = iw_event->ord; 1459 1460 /* 1461 * Protect against the user destroying conn_id from another thread 1462 * until we're done accessing it. 1463 */ 1464 atomic_inc(&conn_id->refcount); 1465 ret = conn_id->id.event_handler(&conn_id->id, &event); 1466 if (ret) { 1467 /* User wants to destroy the CM ID */ 1468 conn_id->cm_id.iw = NULL; 1469 cma_exch(conn_id, RDMA_CM_DESTROYING); 1470 mutex_unlock(&conn_id->handler_mutex); 1471 cma_deref_id(conn_id); 1472 rdma_destroy_id(&conn_id->id); 1473 goto out; 1474 } 1475 1476 mutex_unlock(&conn_id->handler_mutex); 1477 cma_deref_id(conn_id); 1478 1479 out: 1480 if (dev) 1481 dev_put(dev); 1482 mutex_unlock(&listen_id->handler_mutex); 1483 return ret; 1484 } 1485 1486 static int cma_ib_listen(struct rdma_id_private *id_priv) 1487 { 1488 struct ib_cm_compare_data compare_data; 1489 struct sockaddr *addr; 1490 struct ib_cm_id *id; 1491 __be64 svc_id; 1492 int ret; 1493 1494 id = ib_create_cm_id(id_priv->id.device, cma_req_handler, id_priv); 1495 if (IS_ERR(id)) 1496 return PTR_ERR(id); 1497 1498 id_priv->cm_id.ib = id; 1499 1500 addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr; 1501 svc_id = cma_get_service_id(id_priv->id.ps, addr); 1502 if (cma_any_addr(addr)) 1503 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL); 1504 else { 1505 cma_set_compare_data(id_priv->id.ps, addr, &compare_data); 1506 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data); 1507 } 1508 1509 if (ret) { 1510 ib_destroy_cm_id(id_priv->cm_id.ib); 1511 id_priv->cm_id.ib = NULL; 1512 } 1513 1514 return ret; 1515 } 1516 1517 static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog) 1518 { 1519 int ret; 1520 struct sockaddr_in *sin; 1521 struct iw_cm_id *id; 1522 1523 id = iw_create_cm_id(id_priv->id.device, 1524 iw_conn_req_handler, 1525 id_priv); 1526 if (IS_ERR(id)) 1527 return PTR_ERR(id); 1528 1529 id_priv->cm_id.iw = id; 1530 1531 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; 1532 id_priv->cm_id.iw->local_addr = *sin; 1533 1534 ret = iw_cm_listen(id_priv->cm_id.iw, backlog); 1535 1536 if (ret) { 1537 iw_destroy_cm_id(id_priv->cm_id.iw); 1538 id_priv->cm_id.iw = NULL; 1539 } 1540 1541 return ret; 1542 } 1543 1544 static int cma_listen_handler(struct rdma_cm_id *id, 1545 struct rdma_cm_event *event) 1546 { 1547 struct rdma_id_private *id_priv = id->context; 1548 1549 id->context = id_priv->id.context; 1550 id->event_handler = id_priv->id.event_handler; 1551 return id_priv->id.event_handler(id, event); 1552 } 1553 1554 static void cma_listen_on_dev(struct rdma_id_private *id_priv, 1555 struct cma_device *cma_dev) 1556 { 1557 struct rdma_id_private *dev_id_priv; 1558 struct rdma_cm_id *id; 1559 int ret; 1560 1561 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps, 1562 id_priv->id.qp_type); 1563 if (IS_ERR(id)) 1564 return; 1565 1566 dev_id_priv = container_of(id, struct rdma_id_private, id); 1567 1568 dev_id_priv->state = RDMA_CM_ADDR_BOUND; 1569 memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr, 1570 ip_addr_size((struct sockaddr *) &id_priv->id.route.addr.src_addr)); 1571 1572 cma_attach_to_dev(dev_id_priv, cma_dev); 1573 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list); 1574 atomic_inc(&id_priv->refcount); 1575 dev_id_priv->internal_id = 1; 1576 1577 ret = rdma_listen(id, id_priv->backlog); 1578 if (ret) 1579 printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, " 1580 "listening on device %s\n", ret, cma_dev->device->name); 1581 } 1582 1583 static void cma_listen_on_all(struct rdma_id_private *id_priv) 1584 { 1585 struct cma_device *cma_dev; 1586 1587 mutex_lock(&lock); 1588 list_add_tail(&id_priv->list, &listen_any_list); 1589 list_for_each_entry(cma_dev, &dev_list, list) 1590 cma_listen_on_dev(id_priv, cma_dev); 1591 mutex_unlock(&lock); 1592 } 1593 1594 void rdma_set_service_type(struct rdma_cm_id *id, int tos) 1595 { 1596 struct rdma_id_private *id_priv; 1597 1598 id_priv = container_of(id, struct rdma_id_private, id); 1599 id_priv->tos = (u8) tos; 1600 } 1601 EXPORT_SYMBOL(rdma_set_service_type); 1602 1603 static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec, 1604 void *context) 1605 { 1606 struct cma_work *work = context; 1607 struct rdma_route *route; 1608 1609 route = &work->id->id.route; 1610 1611 if (!status) { 1612 route->num_paths = 1; 1613 *route->path_rec = *path_rec; 1614 } else { 1615 work->old_state = RDMA_CM_ROUTE_QUERY; 1616 work->new_state = RDMA_CM_ADDR_RESOLVED; 1617 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR; 1618 work->event.status = status; 1619 } 1620 1621 queue_work(cma_wq, &work->work); 1622 } 1623 1624 static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms, 1625 struct cma_work *work) 1626 { 1627 struct rdma_addr *addr = &id_priv->id.route.addr; 1628 struct ib_sa_path_rec path_rec; 1629 ib_sa_comp_mask comp_mask; 1630 struct sockaddr_in6 *sin6; 1631 1632 memset(&path_rec, 0, sizeof path_rec); 1633 rdma_addr_get_sgid(&addr->dev_addr, &path_rec.sgid); 1634 rdma_addr_get_dgid(&addr->dev_addr, &path_rec.dgid); 1635 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(&addr->dev_addr)); 1636 path_rec.numb_path = 1; 1637 path_rec.reversible = 1; 1638 path_rec.service_id = cma_get_service_id(id_priv->id.ps, 1639 (struct sockaddr *) &addr->dst_addr); 1640 1641 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID | 1642 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH | 1643 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID; 1644 1645 if (addr->src_addr.ss_family == AF_INET) { 1646 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos); 1647 comp_mask |= IB_SA_PATH_REC_QOS_CLASS; 1648 } else { 1649 sin6 = (struct sockaddr_in6 *) &addr->src_addr; 1650 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20); 1651 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS; 1652 } 1653 1654 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device, 1655 id_priv->id.port_num, &path_rec, 1656 comp_mask, timeout_ms, 1657 GFP_KERNEL, cma_query_handler, 1658 work, &id_priv->query); 1659 1660 return (id_priv->query_id < 0) ? id_priv->query_id : 0; 1661 } 1662 1663 static void cma_work_handler(struct work_struct *_work) 1664 { 1665 struct cma_work *work = container_of(_work, struct cma_work, work); 1666 struct rdma_id_private *id_priv = work->id; 1667 int destroy = 0; 1668 1669 mutex_lock(&id_priv->handler_mutex); 1670 if (!cma_comp_exch(id_priv, work->old_state, work->new_state)) 1671 goto out; 1672 1673 if (id_priv->id.event_handler(&id_priv->id, &work->event)) { 1674 cma_exch(id_priv, RDMA_CM_DESTROYING); 1675 destroy = 1; 1676 } 1677 out: 1678 mutex_unlock(&id_priv->handler_mutex); 1679 cma_deref_id(id_priv); 1680 if (destroy) 1681 rdma_destroy_id(&id_priv->id); 1682 kfree(work); 1683 } 1684 1685 static void cma_ndev_work_handler(struct work_struct *_work) 1686 { 1687 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work); 1688 struct rdma_id_private *id_priv = work->id; 1689 int destroy = 0; 1690 1691 mutex_lock(&id_priv->handler_mutex); 1692 if (id_priv->state == RDMA_CM_DESTROYING || 1693 id_priv->state == RDMA_CM_DEVICE_REMOVAL) 1694 goto out; 1695 1696 if (id_priv->id.event_handler(&id_priv->id, &work->event)) { 1697 cma_exch(id_priv, RDMA_CM_DESTROYING); 1698 destroy = 1; 1699 } 1700 1701 out: 1702 mutex_unlock(&id_priv->handler_mutex); 1703 cma_deref_id(id_priv); 1704 if (destroy) 1705 rdma_destroy_id(&id_priv->id); 1706 kfree(work); 1707 } 1708 1709 static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms) 1710 { 1711 struct rdma_route *route = &id_priv->id.route; 1712 struct cma_work *work; 1713 int ret; 1714 1715 work = kzalloc(sizeof *work, GFP_KERNEL); 1716 if (!work) 1717 return -ENOMEM; 1718 1719 work->id = id_priv; 1720 INIT_WORK(&work->work, cma_work_handler); 1721 work->old_state = RDMA_CM_ROUTE_QUERY; 1722 work->new_state = RDMA_CM_ROUTE_RESOLVED; 1723 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 1724 1725 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL); 1726 if (!route->path_rec) { 1727 ret = -ENOMEM; 1728 goto err1; 1729 } 1730 1731 ret = cma_query_ib_route(id_priv, timeout_ms, work); 1732 if (ret) 1733 goto err2; 1734 1735 return 0; 1736 err2: 1737 kfree(route->path_rec); 1738 route->path_rec = NULL; 1739 err1: 1740 kfree(work); 1741 return ret; 1742 } 1743 1744 int rdma_set_ib_paths(struct rdma_cm_id *id, 1745 struct ib_sa_path_rec *path_rec, int num_paths) 1746 { 1747 struct rdma_id_private *id_priv; 1748 int ret; 1749 1750 id_priv = container_of(id, struct rdma_id_private, id); 1751 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, 1752 RDMA_CM_ROUTE_RESOLVED)) 1753 return -EINVAL; 1754 1755 id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths, 1756 GFP_KERNEL); 1757 if (!id->route.path_rec) { 1758 ret = -ENOMEM; 1759 goto err; 1760 } 1761 1762 id->route.num_paths = num_paths; 1763 return 0; 1764 err: 1765 cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED); 1766 return ret; 1767 } 1768 EXPORT_SYMBOL(rdma_set_ib_paths); 1769 1770 static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms) 1771 { 1772 struct cma_work *work; 1773 1774 work = kzalloc(sizeof *work, GFP_KERNEL); 1775 if (!work) 1776 return -ENOMEM; 1777 1778 work->id = id_priv; 1779 INIT_WORK(&work->work, cma_work_handler); 1780 work->old_state = RDMA_CM_ROUTE_QUERY; 1781 work->new_state = RDMA_CM_ROUTE_RESOLVED; 1782 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 1783 queue_work(cma_wq, &work->work); 1784 return 0; 1785 } 1786 1787 static int cma_resolve_iboe_route(struct rdma_id_private *id_priv) 1788 { 1789 struct rdma_route *route = &id_priv->id.route; 1790 struct rdma_addr *addr = &route->addr; 1791 struct cma_work *work; 1792 int ret; 1793 struct sockaddr_in *src_addr = (struct sockaddr_in *)&route->addr.src_addr; 1794 struct sockaddr_in *dst_addr = (struct sockaddr_in *)&route->addr.dst_addr; 1795 struct net_device *ndev = NULL; 1796 u16 vid; 1797 1798 if (src_addr->sin_family != dst_addr->sin_family) 1799 return -EINVAL; 1800 1801 work = kzalloc(sizeof *work, GFP_KERNEL); 1802 if (!work) 1803 return -ENOMEM; 1804 1805 work->id = id_priv; 1806 INIT_WORK(&work->work, cma_work_handler); 1807 1808 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL); 1809 if (!route->path_rec) { 1810 ret = -ENOMEM; 1811 goto err1; 1812 } 1813 1814 route->num_paths = 1; 1815 1816 if (addr->dev_addr.bound_dev_if) 1817 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if); 1818 if (!ndev) { 1819 ret = -ENODEV; 1820 goto err2; 1821 } 1822 1823 vid = rdma_vlan_dev_vlan_id(ndev); 1824 1825 iboe_mac_vlan_to_ll(&route->path_rec->sgid, addr->dev_addr.src_dev_addr, vid); 1826 iboe_mac_vlan_to_ll(&route->path_rec->dgid, addr->dev_addr.dst_dev_addr, vid); 1827 1828 route->path_rec->hop_limit = 1; 1829 route->path_rec->reversible = 1; 1830 route->path_rec->pkey = cpu_to_be16(0xffff); 1831 route->path_rec->mtu_selector = IB_SA_EQ; 1832 route->path_rec->sl = netdev_get_prio_tc_map( 1833 ndev->priv_flags & IFF_802_1Q_VLAN ? 1834 vlan_dev_real_dev(ndev) : ndev, 1835 rt_tos2priority(id_priv->tos)); 1836 1837 route->path_rec->mtu = iboe_get_mtu(ndev->mtu); 1838 route->path_rec->rate_selector = IB_SA_EQ; 1839 route->path_rec->rate = iboe_get_rate(ndev); 1840 dev_put(ndev); 1841 route->path_rec->packet_life_time_selector = IB_SA_EQ; 1842 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME; 1843 if (!route->path_rec->mtu) { 1844 ret = -EINVAL; 1845 goto err2; 1846 } 1847 1848 work->old_state = RDMA_CM_ROUTE_QUERY; 1849 work->new_state = RDMA_CM_ROUTE_RESOLVED; 1850 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 1851 work->event.status = 0; 1852 1853 queue_work(cma_wq, &work->work); 1854 1855 return 0; 1856 1857 err2: 1858 kfree(route->path_rec); 1859 route->path_rec = NULL; 1860 err1: 1861 kfree(work); 1862 return ret; 1863 } 1864 1865 int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms) 1866 { 1867 struct rdma_id_private *id_priv; 1868 int ret; 1869 1870 id_priv = container_of(id, struct rdma_id_private, id); 1871 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY)) 1872 return -EINVAL; 1873 1874 atomic_inc(&id_priv->refcount); 1875 switch (rdma_node_get_transport(id->device->node_type)) { 1876 case RDMA_TRANSPORT_IB: 1877 switch (rdma_port_get_link_layer(id->device, id->port_num)) { 1878 case IB_LINK_LAYER_INFINIBAND: 1879 ret = cma_resolve_ib_route(id_priv, timeout_ms); 1880 break; 1881 case IB_LINK_LAYER_ETHERNET: 1882 ret = cma_resolve_iboe_route(id_priv); 1883 break; 1884 default: 1885 ret = -ENOSYS; 1886 } 1887 break; 1888 case RDMA_TRANSPORT_IWARP: 1889 ret = cma_resolve_iw_route(id_priv, timeout_ms); 1890 break; 1891 default: 1892 ret = -ENOSYS; 1893 break; 1894 } 1895 if (ret) 1896 goto err; 1897 1898 return 0; 1899 err: 1900 cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED); 1901 cma_deref_id(id_priv); 1902 return ret; 1903 } 1904 EXPORT_SYMBOL(rdma_resolve_route); 1905 1906 static int cma_bind_loopback(struct rdma_id_private *id_priv) 1907 { 1908 struct cma_device *cma_dev; 1909 struct ib_port_attr port_attr; 1910 union ib_gid gid; 1911 u16 pkey; 1912 int ret; 1913 u8 p; 1914 1915 mutex_lock(&lock); 1916 if (list_empty(&dev_list)) { 1917 ret = -ENODEV; 1918 goto out; 1919 } 1920 list_for_each_entry(cma_dev, &dev_list, list) 1921 for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p) 1922 if (!ib_query_port(cma_dev->device, p, &port_attr) && 1923 port_attr.state == IB_PORT_ACTIVE) 1924 goto port_found; 1925 1926 p = 1; 1927 cma_dev = list_entry(dev_list.next, struct cma_device, list); 1928 1929 port_found: 1930 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid); 1931 if (ret) 1932 goto out; 1933 1934 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey); 1935 if (ret) 1936 goto out; 1937 1938 id_priv->id.route.addr.dev_addr.dev_type = 1939 (rdma_port_get_link_layer(cma_dev->device, p) == IB_LINK_LAYER_INFINIBAND) ? 1940 ARPHRD_INFINIBAND : ARPHRD_ETHER; 1941 1942 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid); 1943 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey); 1944 id_priv->id.port_num = p; 1945 cma_attach_to_dev(id_priv, cma_dev); 1946 out: 1947 mutex_unlock(&lock); 1948 return ret; 1949 } 1950 1951 static void addr_handler(int status, struct sockaddr *src_addr, 1952 struct rdma_dev_addr *dev_addr, void *context) 1953 { 1954 struct rdma_id_private *id_priv = context; 1955 struct rdma_cm_event event; 1956 1957 memset(&event, 0, sizeof event); 1958 mutex_lock(&id_priv->handler_mutex); 1959 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, 1960 RDMA_CM_ADDR_RESOLVED)) 1961 goto out; 1962 1963 if (!status && !id_priv->cma_dev) 1964 status = cma_acquire_dev(id_priv); 1965 1966 if (status) { 1967 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, 1968 RDMA_CM_ADDR_BOUND)) 1969 goto out; 1970 event.event = RDMA_CM_EVENT_ADDR_ERROR; 1971 event.status = status; 1972 } else { 1973 memcpy(&id_priv->id.route.addr.src_addr, src_addr, 1974 ip_addr_size(src_addr)); 1975 event.event = RDMA_CM_EVENT_ADDR_RESOLVED; 1976 } 1977 1978 if (id_priv->id.event_handler(&id_priv->id, &event)) { 1979 cma_exch(id_priv, RDMA_CM_DESTROYING); 1980 mutex_unlock(&id_priv->handler_mutex); 1981 cma_deref_id(id_priv); 1982 rdma_destroy_id(&id_priv->id); 1983 return; 1984 } 1985 out: 1986 mutex_unlock(&id_priv->handler_mutex); 1987 cma_deref_id(id_priv); 1988 } 1989 1990 static int cma_resolve_loopback(struct rdma_id_private *id_priv) 1991 { 1992 struct cma_work *work; 1993 struct sockaddr *src, *dst; 1994 union ib_gid gid; 1995 int ret; 1996 1997 work = kzalloc(sizeof *work, GFP_KERNEL); 1998 if (!work) 1999 return -ENOMEM; 2000 2001 if (!id_priv->cma_dev) { 2002 ret = cma_bind_loopback(id_priv); 2003 if (ret) 2004 goto err; 2005 } 2006 2007 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid); 2008 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid); 2009 2010 src = (struct sockaddr *) &id_priv->id.route.addr.src_addr; 2011 if (cma_zero_addr(src)) { 2012 dst = (struct sockaddr *) &id_priv->id.route.addr.dst_addr; 2013 if ((src->sa_family = dst->sa_family) == AF_INET) { 2014 ((struct sockaddr_in *)src)->sin_addr = 2015 ((struct sockaddr_in *)dst)->sin_addr; 2016 } else { 2017 ((struct sockaddr_in6 *)src)->sin6_addr = 2018 ((struct sockaddr_in6 *)dst)->sin6_addr; 2019 } 2020 } 2021 2022 work->id = id_priv; 2023 INIT_WORK(&work->work, cma_work_handler); 2024 work->old_state = RDMA_CM_ADDR_QUERY; 2025 work->new_state = RDMA_CM_ADDR_RESOLVED; 2026 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED; 2027 queue_work(cma_wq, &work->work); 2028 return 0; 2029 err: 2030 kfree(work); 2031 return ret; 2032 } 2033 2034 static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, 2035 struct sockaddr *dst_addr) 2036 { 2037 if (!src_addr || !src_addr->sa_family) { 2038 src_addr = (struct sockaddr *) &id->route.addr.src_addr; 2039 if ((src_addr->sa_family = dst_addr->sa_family) == AF_INET6) { 2040 ((struct sockaddr_in6 *) src_addr)->sin6_scope_id = 2041 ((struct sockaddr_in6 *) dst_addr)->sin6_scope_id; 2042 } 2043 } 2044 return rdma_bind_addr(id, src_addr); 2045 } 2046 2047 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, 2048 struct sockaddr *dst_addr, int timeout_ms) 2049 { 2050 struct rdma_id_private *id_priv; 2051 int ret; 2052 2053 id_priv = container_of(id, struct rdma_id_private, id); 2054 if (id_priv->state == RDMA_CM_IDLE) { 2055 ret = cma_bind_addr(id, src_addr, dst_addr); 2056 if (ret) 2057 return ret; 2058 } 2059 2060 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY)) 2061 return -EINVAL; 2062 2063 atomic_inc(&id_priv->refcount); 2064 memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr)); 2065 if (cma_any_addr(dst_addr)) 2066 ret = cma_resolve_loopback(id_priv); 2067 else 2068 ret = rdma_resolve_ip(&addr_client, (struct sockaddr *) &id->route.addr.src_addr, 2069 dst_addr, &id->route.addr.dev_addr, 2070 timeout_ms, addr_handler, id_priv); 2071 if (ret) 2072 goto err; 2073 2074 return 0; 2075 err: 2076 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND); 2077 cma_deref_id(id_priv); 2078 return ret; 2079 } 2080 EXPORT_SYMBOL(rdma_resolve_addr); 2081 2082 int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse) 2083 { 2084 struct rdma_id_private *id_priv; 2085 unsigned long flags; 2086 int ret; 2087 2088 id_priv = container_of(id, struct rdma_id_private, id); 2089 spin_lock_irqsave(&id_priv->lock, flags); 2090 if (id_priv->state == RDMA_CM_IDLE) { 2091 id_priv->reuseaddr = reuse; 2092 ret = 0; 2093 } else { 2094 ret = -EINVAL; 2095 } 2096 spin_unlock_irqrestore(&id_priv->lock, flags); 2097 return ret; 2098 } 2099 EXPORT_SYMBOL(rdma_set_reuseaddr); 2100 2101 static void cma_bind_port(struct rdma_bind_list *bind_list, 2102 struct rdma_id_private *id_priv) 2103 { 2104 struct sockaddr_in *sin; 2105 2106 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; 2107 sin->sin_port = htons(bind_list->port); 2108 id_priv->bind_list = bind_list; 2109 hlist_add_head(&id_priv->node, &bind_list->owners); 2110 } 2111 2112 static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv, 2113 unsigned short snum) 2114 { 2115 struct rdma_bind_list *bind_list; 2116 int port, ret; 2117 2118 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL); 2119 if (!bind_list) 2120 return -ENOMEM; 2121 2122 do { 2123 ret = idr_get_new_above(ps, bind_list, snum, &port); 2124 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL)); 2125 2126 if (ret) 2127 goto err1; 2128 2129 if (port != snum) { 2130 ret = -EADDRNOTAVAIL; 2131 goto err2; 2132 } 2133 2134 bind_list->ps = ps; 2135 bind_list->port = (unsigned short) port; 2136 cma_bind_port(bind_list, id_priv); 2137 return 0; 2138 err2: 2139 idr_remove(ps, port); 2140 err1: 2141 kfree(bind_list); 2142 return ret; 2143 } 2144 2145 static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv) 2146 { 2147 static unsigned int last_used_port; 2148 int low, high, remaining; 2149 unsigned int rover; 2150 2151 inet_get_local_port_range(&low, &high); 2152 remaining = (high - low) + 1; 2153 rover = net_random() % remaining + low; 2154 retry: 2155 if (last_used_port != rover && 2156 !idr_find(ps, (unsigned short) rover)) { 2157 int ret = cma_alloc_port(ps, id_priv, rover); 2158 /* 2159 * Remember previously used port number in order to avoid 2160 * re-using same port immediately after it is closed. 2161 */ 2162 if (!ret) 2163 last_used_port = rover; 2164 if (ret != -EADDRNOTAVAIL) 2165 return ret; 2166 } 2167 if (--remaining) { 2168 rover++; 2169 if ((rover < low) || (rover > high)) 2170 rover = low; 2171 goto retry; 2172 } 2173 return -EADDRNOTAVAIL; 2174 } 2175 2176 /* 2177 * Check that the requested port is available. This is called when trying to 2178 * bind to a specific port, or when trying to listen on a bound port. In 2179 * the latter case, the provided id_priv may already be on the bind_list, but 2180 * we still need to check that it's okay to start listening. 2181 */ 2182 static int cma_check_port(struct rdma_bind_list *bind_list, 2183 struct rdma_id_private *id_priv, uint8_t reuseaddr) 2184 { 2185 struct rdma_id_private *cur_id; 2186 struct sockaddr *addr, *cur_addr; 2187 struct hlist_node *node; 2188 2189 addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr; 2190 if (cma_any_addr(addr) && !reuseaddr) 2191 return -EADDRNOTAVAIL; 2192 2193 hlist_for_each_entry(cur_id, node, &bind_list->owners, node) { 2194 if (id_priv == cur_id) 2195 continue; 2196 2197 if ((cur_id->state == RDMA_CM_LISTEN) || 2198 !reuseaddr || !cur_id->reuseaddr) { 2199 cur_addr = (struct sockaddr *) &cur_id->id.route.addr.src_addr; 2200 if (cma_any_addr(cur_addr)) 2201 return -EADDRNOTAVAIL; 2202 2203 if (!cma_addr_cmp(addr, cur_addr)) 2204 return -EADDRINUSE; 2205 } 2206 } 2207 return 0; 2208 } 2209 2210 static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv) 2211 { 2212 struct rdma_bind_list *bind_list; 2213 unsigned short snum; 2214 int ret; 2215 2216 snum = ntohs(cma_port((struct sockaddr *) &id_priv->id.route.addr.src_addr)); 2217 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE)) 2218 return -EACCES; 2219 2220 bind_list = idr_find(ps, snum); 2221 if (!bind_list) { 2222 ret = cma_alloc_port(ps, id_priv, snum); 2223 } else { 2224 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr); 2225 if (!ret) 2226 cma_bind_port(bind_list, id_priv); 2227 } 2228 return ret; 2229 } 2230 2231 static int cma_bind_listen(struct rdma_id_private *id_priv) 2232 { 2233 struct rdma_bind_list *bind_list = id_priv->bind_list; 2234 int ret = 0; 2235 2236 mutex_lock(&lock); 2237 if (bind_list->owners.first->next) 2238 ret = cma_check_port(bind_list, id_priv, 0); 2239 mutex_unlock(&lock); 2240 return ret; 2241 } 2242 2243 static int cma_get_port(struct rdma_id_private *id_priv) 2244 { 2245 struct idr *ps; 2246 int ret; 2247 2248 switch (id_priv->id.ps) { 2249 case RDMA_PS_SDP: 2250 ps = &sdp_ps; 2251 break; 2252 case RDMA_PS_TCP: 2253 ps = &tcp_ps; 2254 break; 2255 case RDMA_PS_UDP: 2256 ps = &udp_ps; 2257 break; 2258 case RDMA_PS_IPOIB: 2259 ps = &ipoib_ps; 2260 break; 2261 case RDMA_PS_IB: 2262 ps = &ib_ps; 2263 break; 2264 default: 2265 return -EPROTONOSUPPORT; 2266 } 2267 2268 mutex_lock(&lock); 2269 if (cma_any_port((struct sockaddr *) &id_priv->id.route.addr.src_addr)) 2270 ret = cma_alloc_any_port(ps, id_priv); 2271 else 2272 ret = cma_use_port(ps, id_priv); 2273 mutex_unlock(&lock); 2274 2275 return ret; 2276 } 2277 2278 static int cma_check_linklocal(struct rdma_dev_addr *dev_addr, 2279 struct sockaddr *addr) 2280 { 2281 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 2282 struct sockaddr_in6 *sin6; 2283 2284 if (addr->sa_family != AF_INET6) 2285 return 0; 2286 2287 sin6 = (struct sockaddr_in6 *) addr; 2288 if ((ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) && 2289 !sin6->sin6_scope_id) 2290 return -EINVAL; 2291 2292 dev_addr->bound_dev_if = sin6->sin6_scope_id; 2293 #endif 2294 return 0; 2295 } 2296 2297 int rdma_listen(struct rdma_cm_id *id, int backlog) 2298 { 2299 struct rdma_id_private *id_priv; 2300 int ret; 2301 2302 id_priv = container_of(id, struct rdma_id_private, id); 2303 if (id_priv->state == RDMA_CM_IDLE) { 2304 ((struct sockaddr *) &id->route.addr.src_addr)->sa_family = AF_INET; 2305 ret = rdma_bind_addr(id, (struct sockaddr *) &id->route.addr.src_addr); 2306 if (ret) 2307 return ret; 2308 } 2309 2310 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN)) 2311 return -EINVAL; 2312 2313 if (id_priv->reuseaddr) { 2314 ret = cma_bind_listen(id_priv); 2315 if (ret) 2316 goto err; 2317 } 2318 2319 id_priv->backlog = backlog; 2320 if (id->device) { 2321 switch (rdma_node_get_transport(id->device->node_type)) { 2322 case RDMA_TRANSPORT_IB: 2323 ret = cma_ib_listen(id_priv); 2324 if (ret) 2325 goto err; 2326 break; 2327 case RDMA_TRANSPORT_IWARP: 2328 ret = cma_iw_listen(id_priv, backlog); 2329 if (ret) 2330 goto err; 2331 break; 2332 default: 2333 ret = -ENOSYS; 2334 goto err; 2335 } 2336 } else 2337 cma_listen_on_all(id_priv); 2338 2339 return 0; 2340 err: 2341 id_priv->backlog = 0; 2342 cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND); 2343 return ret; 2344 } 2345 EXPORT_SYMBOL(rdma_listen); 2346 2347 int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr) 2348 { 2349 struct rdma_id_private *id_priv; 2350 int ret; 2351 2352 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6) 2353 return -EAFNOSUPPORT; 2354 2355 id_priv = container_of(id, struct rdma_id_private, id); 2356 if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND)) 2357 return -EINVAL; 2358 2359 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr); 2360 if (ret) 2361 goto err1; 2362 2363 if (!cma_any_addr(addr)) { 2364 ret = rdma_translate_ip(addr, &id->route.addr.dev_addr); 2365 if (ret) 2366 goto err1; 2367 2368 ret = cma_acquire_dev(id_priv); 2369 if (ret) 2370 goto err1; 2371 } 2372 2373 memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr)); 2374 ret = cma_get_port(id_priv); 2375 if (ret) 2376 goto err2; 2377 2378 return 0; 2379 err2: 2380 if (id_priv->cma_dev) 2381 cma_release_dev(id_priv); 2382 err1: 2383 cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE); 2384 return ret; 2385 } 2386 EXPORT_SYMBOL(rdma_bind_addr); 2387 2388 static int cma_format_hdr(void *hdr, enum rdma_port_space ps, 2389 struct rdma_route *route) 2390 { 2391 struct cma_hdr *cma_hdr; 2392 struct sdp_hh *sdp_hdr; 2393 2394 if (route->addr.src_addr.ss_family == AF_INET) { 2395 struct sockaddr_in *src4, *dst4; 2396 2397 src4 = (struct sockaddr_in *) &route->addr.src_addr; 2398 dst4 = (struct sockaddr_in *) &route->addr.dst_addr; 2399 2400 switch (ps) { 2401 case RDMA_PS_SDP: 2402 sdp_hdr = hdr; 2403 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION) 2404 return -EINVAL; 2405 sdp_set_ip_ver(sdp_hdr, 4); 2406 sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; 2407 sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; 2408 sdp_hdr->port = src4->sin_port; 2409 break; 2410 default: 2411 cma_hdr = hdr; 2412 cma_hdr->cma_version = CMA_VERSION; 2413 cma_set_ip_ver(cma_hdr, 4); 2414 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; 2415 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; 2416 cma_hdr->port = src4->sin_port; 2417 break; 2418 } 2419 } else { 2420 struct sockaddr_in6 *src6, *dst6; 2421 2422 src6 = (struct sockaddr_in6 *) &route->addr.src_addr; 2423 dst6 = (struct sockaddr_in6 *) &route->addr.dst_addr; 2424 2425 switch (ps) { 2426 case RDMA_PS_SDP: 2427 sdp_hdr = hdr; 2428 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION) 2429 return -EINVAL; 2430 sdp_set_ip_ver(sdp_hdr, 6); 2431 sdp_hdr->src_addr.ip6 = src6->sin6_addr; 2432 sdp_hdr->dst_addr.ip6 = dst6->sin6_addr; 2433 sdp_hdr->port = src6->sin6_port; 2434 break; 2435 default: 2436 cma_hdr = hdr; 2437 cma_hdr->cma_version = CMA_VERSION; 2438 cma_set_ip_ver(cma_hdr, 6); 2439 cma_hdr->src_addr.ip6 = src6->sin6_addr; 2440 cma_hdr->dst_addr.ip6 = dst6->sin6_addr; 2441 cma_hdr->port = src6->sin6_port; 2442 break; 2443 } 2444 } 2445 return 0; 2446 } 2447 2448 static int cma_sidr_rep_handler(struct ib_cm_id *cm_id, 2449 struct ib_cm_event *ib_event) 2450 { 2451 struct rdma_id_private *id_priv = cm_id->context; 2452 struct rdma_cm_event event; 2453 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd; 2454 int ret = 0; 2455 2456 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT)) 2457 return 0; 2458 2459 memset(&event, 0, sizeof event); 2460 switch (ib_event->event) { 2461 case IB_CM_SIDR_REQ_ERROR: 2462 event.event = RDMA_CM_EVENT_UNREACHABLE; 2463 event.status = -ETIMEDOUT; 2464 break; 2465 case IB_CM_SIDR_REP_RECEIVED: 2466 event.param.ud.private_data = ib_event->private_data; 2467 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE; 2468 if (rep->status != IB_SIDR_SUCCESS) { 2469 event.event = RDMA_CM_EVENT_UNREACHABLE; 2470 event.status = ib_event->param.sidr_rep_rcvd.status; 2471 break; 2472 } 2473 ret = cma_set_qkey(id_priv); 2474 if (ret) { 2475 event.event = RDMA_CM_EVENT_ADDR_ERROR; 2476 event.status = -EINVAL; 2477 break; 2478 } 2479 if (id_priv->qkey != rep->qkey) { 2480 event.event = RDMA_CM_EVENT_UNREACHABLE; 2481 event.status = -EINVAL; 2482 break; 2483 } 2484 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num, 2485 id_priv->id.route.path_rec, 2486 &event.param.ud.ah_attr); 2487 event.param.ud.qp_num = rep->qpn; 2488 event.param.ud.qkey = rep->qkey; 2489 event.event = RDMA_CM_EVENT_ESTABLISHED; 2490 event.status = 0; 2491 break; 2492 default: 2493 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n", 2494 ib_event->event); 2495 goto out; 2496 } 2497 2498 ret = id_priv->id.event_handler(&id_priv->id, &event); 2499 if (ret) { 2500 /* Destroy the CM ID by returning a non-zero value. */ 2501 id_priv->cm_id.ib = NULL; 2502 cma_exch(id_priv, RDMA_CM_DESTROYING); 2503 mutex_unlock(&id_priv->handler_mutex); 2504 rdma_destroy_id(&id_priv->id); 2505 return ret; 2506 } 2507 out: 2508 mutex_unlock(&id_priv->handler_mutex); 2509 return ret; 2510 } 2511 2512 static int cma_resolve_ib_udp(struct rdma_id_private *id_priv, 2513 struct rdma_conn_param *conn_param) 2514 { 2515 struct ib_cm_sidr_req_param req; 2516 struct rdma_route *route; 2517 struct ib_cm_id *id; 2518 int ret; 2519 2520 req.private_data_len = sizeof(struct cma_hdr) + 2521 conn_param->private_data_len; 2522 if (req.private_data_len < conn_param->private_data_len) 2523 return -EINVAL; 2524 2525 req.private_data = kzalloc(req.private_data_len, GFP_ATOMIC); 2526 if (!req.private_data) 2527 return -ENOMEM; 2528 2529 if (conn_param->private_data && conn_param->private_data_len) 2530 memcpy((void *) req.private_data + sizeof(struct cma_hdr), 2531 conn_param->private_data, conn_param->private_data_len); 2532 2533 route = &id_priv->id.route; 2534 ret = cma_format_hdr((void *) req.private_data, id_priv->id.ps, route); 2535 if (ret) 2536 goto out; 2537 2538 id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler, 2539 id_priv); 2540 if (IS_ERR(id)) { 2541 ret = PTR_ERR(id); 2542 goto out; 2543 } 2544 id_priv->cm_id.ib = id; 2545 2546 req.path = route->path_rec; 2547 req.service_id = cma_get_service_id(id_priv->id.ps, 2548 (struct sockaddr *) &route->addr.dst_addr); 2549 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8); 2550 req.max_cm_retries = CMA_MAX_CM_RETRIES; 2551 2552 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req); 2553 if (ret) { 2554 ib_destroy_cm_id(id_priv->cm_id.ib); 2555 id_priv->cm_id.ib = NULL; 2556 } 2557 out: 2558 kfree(req.private_data); 2559 return ret; 2560 } 2561 2562 static int cma_connect_ib(struct rdma_id_private *id_priv, 2563 struct rdma_conn_param *conn_param) 2564 { 2565 struct ib_cm_req_param req; 2566 struct rdma_route *route; 2567 void *private_data; 2568 struct ib_cm_id *id; 2569 int offset, ret; 2570 2571 memset(&req, 0, sizeof req); 2572 offset = cma_user_data_offset(id_priv->id.ps); 2573 req.private_data_len = offset + conn_param->private_data_len; 2574 if (req.private_data_len < conn_param->private_data_len) 2575 return -EINVAL; 2576 2577 private_data = kzalloc(req.private_data_len, GFP_ATOMIC); 2578 if (!private_data) 2579 return -ENOMEM; 2580 2581 if (conn_param->private_data && conn_param->private_data_len) 2582 memcpy(private_data + offset, conn_param->private_data, 2583 conn_param->private_data_len); 2584 2585 id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv); 2586 if (IS_ERR(id)) { 2587 ret = PTR_ERR(id); 2588 goto out; 2589 } 2590 id_priv->cm_id.ib = id; 2591 2592 route = &id_priv->id.route; 2593 ret = cma_format_hdr(private_data, id_priv->id.ps, route); 2594 if (ret) 2595 goto out; 2596 req.private_data = private_data; 2597 2598 req.primary_path = &route->path_rec[0]; 2599 if (route->num_paths == 2) 2600 req.alternate_path = &route->path_rec[1]; 2601 2602 req.service_id = cma_get_service_id(id_priv->id.ps, 2603 (struct sockaddr *) &route->addr.dst_addr); 2604 req.qp_num = id_priv->qp_num; 2605 req.qp_type = id_priv->id.qp_type; 2606 req.starting_psn = id_priv->seq_num; 2607 req.responder_resources = conn_param->responder_resources; 2608 req.initiator_depth = conn_param->initiator_depth; 2609 req.flow_control = conn_param->flow_control; 2610 req.retry_count = conn_param->retry_count; 2611 req.rnr_retry_count = conn_param->rnr_retry_count; 2612 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; 2613 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; 2614 req.max_cm_retries = CMA_MAX_CM_RETRIES; 2615 req.srq = id_priv->srq ? 1 : 0; 2616 2617 ret = ib_send_cm_req(id_priv->cm_id.ib, &req); 2618 out: 2619 if (ret && !IS_ERR(id)) { 2620 ib_destroy_cm_id(id); 2621 id_priv->cm_id.ib = NULL; 2622 } 2623 2624 kfree(private_data); 2625 return ret; 2626 } 2627 2628 static int cma_connect_iw(struct rdma_id_private *id_priv, 2629 struct rdma_conn_param *conn_param) 2630 { 2631 struct iw_cm_id *cm_id; 2632 struct sockaddr_in* sin; 2633 int ret; 2634 struct iw_cm_conn_param iw_param; 2635 2636 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv); 2637 if (IS_ERR(cm_id)) 2638 return PTR_ERR(cm_id); 2639 2640 id_priv->cm_id.iw = cm_id; 2641 2642 sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr; 2643 cm_id->local_addr = *sin; 2644 2645 sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr; 2646 cm_id->remote_addr = *sin; 2647 2648 ret = cma_modify_qp_rtr(id_priv, conn_param); 2649 if (ret) 2650 goto out; 2651 2652 if (conn_param) { 2653 iw_param.ord = conn_param->initiator_depth; 2654 iw_param.ird = conn_param->responder_resources; 2655 iw_param.private_data = conn_param->private_data; 2656 iw_param.private_data_len = conn_param->private_data_len; 2657 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num; 2658 } else { 2659 memset(&iw_param, 0, sizeof iw_param); 2660 iw_param.qpn = id_priv->qp_num; 2661 } 2662 ret = iw_cm_connect(cm_id, &iw_param); 2663 out: 2664 if (ret) { 2665 iw_destroy_cm_id(cm_id); 2666 id_priv->cm_id.iw = NULL; 2667 } 2668 return ret; 2669 } 2670 2671 int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) 2672 { 2673 struct rdma_id_private *id_priv; 2674 int ret; 2675 2676 id_priv = container_of(id, struct rdma_id_private, id); 2677 if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT)) 2678 return -EINVAL; 2679 2680 if (!id->qp) { 2681 id_priv->qp_num = conn_param->qp_num; 2682 id_priv->srq = conn_param->srq; 2683 } 2684 2685 switch (rdma_node_get_transport(id->device->node_type)) { 2686 case RDMA_TRANSPORT_IB: 2687 if (id->qp_type == IB_QPT_UD) 2688 ret = cma_resolve_ib_udp(id_priv, conn_param); 2689 else 2690 ret = cma_connect_ib(id_priv, conn_param); 2691 break; 2692 case RDMA_TRANSPORT_IWARP: 2693 ret = cma_connect_iw(id_priv, conn_param); 2694 break; 2695 default: 2696 ret = -ENOSYS; 2697 break; 2698 } 2699 if (ret) 2700 goto err; 2701 2702 return 0; 2703 err: 2704 cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED); 2705 return ret; 2706 } 2707 EXPORT_SYMBOL(rdma_connect); 2708 2709 static int cma_accept_ib(struct rdma_id_private *id_priv, 2710 struct rdma_conn_param *conn_param) 2711 { 2712 struct ib_cm_rep_param rep; 2713 int ret; 2714 2715 ret = cma_modify_qp_rtr(id_priv, conn_param); 2716 if (ret) 2717 goto out; 2718 2719 ret = cma_modify_qp_rts(id_priv, conn_param); 2720 if (ret) 2721 goto out; 2722 2723 memset(&rep, 0, sizeof rep); 2724 rep.qp_num = id_priv->qp_num; 2725 rep.starting_psn = id_priv->seq_num; 2726 rep.private_data = conn_param->private_data; 2727 rep.private_data_len = conn_param->private_data_len; 2728 rep.responder_resources = conn_param->responder_resources; 2729 rep.initiator_depth = conn_param->initiator_depth; 2730 rep.failover_accepted = 0; 2731 rep.flow_control = conn_param->flow_control; 2732 rep.rnr_retry_count = conn_param->rnr_retry_count; 2733 rep.srq = id_priv->srq ? 1 : 0; 2734 2735 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep); 2736 out: 2737 return ret; 2738 } 2739 2740 static int cma_accept_iw(struct rdma_id_private *id_priv, 2741 struct rdma_conn_param *conn_param) 2742 { 2743 struct iw_cm_conn_param iw_param; 2744 int ret; 2745 2746 ret = cma_modify_qp_rtr(id_priv, conn_param); 2747 if (ret) 2748 return ret; 2749 2750 iw_param.ord = conn_param->initiator_depth; 2751 iw_param.ird = conn_param->responder_resources; 2752 iw_param.private_data = conn_param->private_data; 2753 iw_param.private_data_len = conn_param->private_data_len; 2754 if (id_priv->id.qp) { 2755 iw_param.qpn = id_priv->qp_num; 2756 } else 2757 iw_param.qpn = conn_param->qp_num; 2758 2759 return iw_cm_accept(id_priv->cm_id.iw, &iw_param); 2760 } 2761 2762 static int cma_send_sidr_rep(struct rdma_id_private *id_priv, 2763 enum ib_cm_sidr_status status, 2764 const void *private_data, int private_data_len) 2765 { 2766 struct ib_cm_sidr_rep_param rep; 2767 int ret; 2768 2769 memset(&rep, 0, sizeof rep); 2770 rep.status = status; 2771 if (status == IB_SIDR_SUCCESS) { 2772 ret = cma_set_qkey(id_priv); 2773 if (ret) 2774 return ret; 2775 rep.qp_num = id_priv->qp_num; 2776 rep.qkey = id_priv->qkey; 2777 } 2778 rep.private_data = private_data; 2779 rep.private_data_len = private_data_len; 2780 2781 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep); 2782 } 2783 2784 int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) 2785 { 2786 struct rdma_id_private *id_priv; 2787 int ret; 2788 2789 id_priv = container_of(id, struct rdma_id_private, id); 2790 2791 id_priv->owner = task_pid_nr(current); 2792 2793 if (!cma_comp(id_priv, RDMA_CM_CONNECT)) 2794 return -EINVAL; 2795 2796 if (!id->qp && conn_param) { 2797 id_priv->qp_num = conn_param->qp_num; 2798 id_priv->srq = conn_param->srq; 2799 } 2800 2801 switch (rdma_node_get_transport(id->device->node_type)) { 2802 case RDMA_TRANSPORT_IB: 2803 if (id->qp_type == IB_QPT_UD) { 2804 if (conn_param) 2805 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS, 2806 conn_param->private_data, 2807 conn_param->private_data_len); 2808 else 2809 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS, 2810 NULL, 0); 2811 } else { 2812 if (conn_param) 2813 ret = cma_accept_ib(id_priv, conn_param); 2814 else 2815 ret = cma_rep_recv(id_priv); 2816 } 2817 break; 2818 case RDMA_TRANSPORT_IWARP: 2819 ret = cma_accept_iw(id_priv, conn_param); 2820 break; 2821 default: 2822 ret = -ENOSYS; 2823 break; 2824 } 2825 2826 if (ret) 2827 goto reject; 2828 2829 return 0; 2830 reject: 2831 cma_modify_qp_err(id_priv); 2832 rdma_reject(id, NULL, 0); 2833 return ret; 2834 } 2835 EXPORT_SYMBOL(rdma_accept); 2836 2837 int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event) 2838 { 2839 struct rdma_id_private *id_priv; 2840 int ret; 2841 2842 id_priv = container_of(id, struct rdma_id_private, id); 2843 if (!id_priv->cm_id.ib) 2844 return -EINVAL; 2845 2846 switch (id->device->node_type) { 2847 case RDMA_NODE_IB_CA: 2848 ret = ib_cm_notify(id_priv->cm_id.ib, event); 2849 break; 2850 default: 2851 ret = 0; 2852 break; 2853 } 2854 return ret; 2855 } 2856 EXPORT_SYMBOL(rdma_notify); 2857 2858 int rdma_reject(struct rdma_cm_id *id, const void *private_data, 2859 u8 private_data_len) 2860 { 2861 struct rdma_id_private *id_priv; 2862 int ret; 2863 2864 id_priv = container_of(id, struct rdma_id_private, id); 2865 if (!id_priv->cm_id.ib) 2866 return -EINVAL; 2867 2868 switch (rdma_node_get_transport(id->device->node_type)) { 2869 case RDMA_TRANSPORT_IB: 2870 if (id->qp_type == IB_QPT_UD) 2871 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 2872 private_data, private_data_len); 2873 else 2874 ret = ib_send_cm_rej(id_priv->cm_id.ib, 2875 IB_CM_REJ_CONSUMER_DEFINED, NULL, 2876 0, private_data, private_data_len); 2877 break; 2878 case RDMA_TRANSPORT_IWARP: 2879 ret = iw_cm_reject(id_priv->cm_id.iw, 2880 private_data, private_data_len); 2881 break; 2882 default: 2883 ret = -ENOSYS; 2884 break; 2885 } 2886 return ret; 2887 } 2888 EXPORT_SYMBOL(rdma_reject); 2889 2890 int rdma_disconnect(struct rdma_cm_id *id) 2891 { 2892 struct rdma_id_private *id_priv; 2893 int ret; 2894 2895 id_priv = container_of(id, struct rdma_id_private, id); 2896 if (!id_priv->cm_id.ib) 2897 return -EINVAL; 2898 2899 switch (rdma_node_get_transport(id->device->node_type)) { 2900 case RDMA_TRANSPORT_IB: 2901 ret = cma_modify_qp_err(id_priv); 2902 if (ret) 2903 goto out; 2904 /* Initiate or respond to a disconnect. */ 2905 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0)) 2906 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0); 2907 break; 2908 case RDMA_TRANSPORT_IWARP: 2909 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0); 2910 break; 2911 default: 2912 ret = -EINVAL; 2913 break; 2914 } 2915 out: 2916 return ret; 2917 } 2918 EXPORT_SYMBOL(rdma_disconnect); 2919 2920 static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast) 2921 { 2922 struct rdma_id_private *id_priv; 2923 struct cma_multicast *mc = multicast->context; 2924 struct rdma_cm_event event; 2925 int ret; 2926 2927 id_priv = mc->id_priv; 2928 if (cma_disable_callback(id_priv, RDMA_CM_ADDR_BOUND) && 2929 cma_disable_callback(id_priv, RDMA_CM_ADDR_RESOLVED)) 2930 return 0; 2931 2932 mutex_lock(&id_priv->qp_mutex); 2933 if (!status && id_priv->id.qp) 2934 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid, 2935 be16_to_cpu(multicast->rec.mlid)); 2936 mutex_unlock(&id_priv->qp_mutex); 2937 2938 memset(&event, 0, sizeof event); 2939 event.status = status; 2940 event.param.ud.private_data = mc->context; 2941 if (!status) { 2942 event.event = RDMA_CM_EVENT_MULTICAST_JOIN; 2943 ib_init_ah_from_mcmember(id_priv->id.device, 2944 id_priv->id.port_num, &multicast->rec, 2945 &event.param.ud.ah_attr); 2946 event.param.ud.qp_num = 0xFFFFFF; 2947 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey); 2948 } else 2949 event.event = RDMA_CM_EVENT_MULTICAST_ERROR; 2950 2951 ret = id_priv->id.event_handler(&id_priv->id, &event); 2952 if (ret) { 2953 cma_exch(id_priv, RDMA_CM_DESTROYING); 2954 mutex_unlock(&id_priv->handler_mutex); 2955 rdma_destroy_id(&id_priv->id); 2956 return 0; 2957 } 2958 2959 mutex_unlock(&id_priv->handler_mutex); 2960 return 0; 2961 } 2962 2963 static void cma_set_mgid(struct rdma_id_private *id_priv, 2964 struct sockaddr *addr, union ib_gid *mgid) 2965 { 2966 unsigned char mc_map[MAX_ADDR_LEN]; 2967 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 2968 struct sockaddr_in *sin = (struct sockaddr_in *) addr; 2969 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr; 2970 2971 if (cma_any_addr(addr)) { 2972 memset(mgid, 0, sizeof *mgid); 2973 } else if ((addr->sa_family == AF_INET6) && 2974 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) == 2975 0xFF10A01B)) { 2976 /* IPv6 address is an SA assigned MGID. */ 2977 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid); 2978 } else if ((addr->sa_family == AF_INET6)) { 2979 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map); 2980 if (id_priv->id.ps == RDMA_PS_UDP) 2981 mc_map[7] = 0x01; /* Use RDMA CM signature */ 2982 *mgid = *(union ib_gid *) (mc_map + 4); 2983 } else { 2984 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map); 2985 if (id_priv->id.ps == RDMA_PS_UDP) 2986 mc_map[7] = 0x01; /* Use RDMA CM signature */ 2987 *mgid = *(union ib_gid *) (mc_map + 4); 2988 } 2989 } 2990 2991 static int cma_join_ib_multicast(struct rdma_id_private *id_priv, 2992 struct cma_multicast *mc) 2993 { 2994 struct ib_sa_mcmember_rec rec; 2995 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 2996 ib_sa_comp_mask comp_mask; 2997 int ret; 2998 2999 ib_addr_get_mgid(dev_addr, &rec.mgid); 3000 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num, 3001 &rec.mgid, &rec); 3002 if (ret) 3003 return ret; 3004 3005 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid); 3006 if (id_priv->id.ps == RDMA_PS_UDP) 3007 rec.qkey = cpu_to_be32(RDMA_UDP_QKEY); 3008 rdma_addr_get_sgid(dev_addr, &rec.port_gid); 3009 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); 3010 rec.join_state = 1; 3011 3012 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID | 3013 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE | 3014 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL | 3015 IB_SA_MCMEMBER_REC_FLOW_LABEL | 3016 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS; 3017 3018 if (id_priv->id.ps == RDMA_PS_IPOIB) 3019 comp_mask |= IB_SA_MCMEMBER_REC_RATE | 3020 IB_SA_MCMEMBER_REC_RATE_SELECTOR; 3021 3022 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device, 3023 id_priv->id.port_num, &rec, 3024 comp_mask, GFP_KERNEL, 3025 cma_ib_mc_handler, mc); 3026 if (IS_ERR(mc->multicast.ib)) 3027 return PTR_ERR(mc->multicast.ib); 3028 3029 return 0; 3030 } 3031 3032 static void iboe_mcast_work_handler(struct work_struct *work) 3033 { 3034 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work); 3035 struct cma_multicast *mc = mw->mc; 3036 struct ib_sa_multicast *m = mc->multicast.ib; 3037 3038 mc->multicast.ib->context = mc; 3039 cma_ib_mc_handler(0, m); 3040 kref_put(&mc->mcref, release_mc); 3041 kfree(mw); 3042 } 3043 3044 static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid) 3045 { 3046 struct sockaddr_in *sin = (struct sockaddr_in *)addr; 3047 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr; 3048 3049 if (cma_any_addr(addr)) { 3050 memset(mgid, 0, sizeof *mgid); 3051 } else if (addr->sa_family == AF_INET6) { 3052 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid); 3053 } else { 3054 mgid->raw[0] = 0xff; 3055 mgid->raw[1] = 0x0e; 3056 mgid->raw[2] = 0; 3057 mgid->raw[3] = 0; 3058 mgid->raw[4] = 0; 3059 mgid->raw[5] = 0; 3060 mgid->raw[6] = 0; 3061 mgid->raw[7] = 0; 3062 mgid->raw[8] = 0; 3063 mgid->raw[9] = 0; 3064 mgid->raw[10] = 0xff; 3065 mgid->raw[11] = 0xff; 3066 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr; 3067 } 3068 } 3069 3070 static int cma_iboe_join_multicast(struct rdma_id_private *id_priv, 3071 struct cma_multicast *mc) 3072 { 3073 struct iboe_mcast_work *work; 3074 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 3075 int err; 3076 struct sockaddr *addr = (struct sockaddr *)&mc->addr; 3077 struct net_device *ndev = NULL; 3078 3079 if (cma_zero_addr((struct sockaddr *)&mc->addr)) 3080 return -EINVAL; 3081 3082 work = kzalloc(sizeof *work, GFP_KERNEL); 3083 if (!work) 3084 return -ENOMEM; 3085 3086 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL); 3087 if (!mc->multicast.ib) { 3088 err = -ENOMEM; 3089 goto out1; 3090 } 3091 3092 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid); 3093 3094 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff); 3095 if (id_priv->id.ps == RDMA_PS_UDP) 3096 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY); 3097 3098 if (dev_addr->bound_dev_if) 3099 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if); 3100 if (!ndev) { 3101 err = -ENODEV; 3102 goto out2; 3103 } 3104 mc->multicast.ib->rec.rate = iboe_get_rate(ndev); 3105 mc->multicast.ib->rec.hop_limit = 1; 3106 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu); 3107 dev_put(ndev); 3108 if (!mc->multicast.ib->rec.mtu) { 3109 err = -EINVAL; 3110 goto out2; 3111 } 3112 iboe_addr_get_sgid(dev_addr, &mc->multicast.ib->rec.port_gid); 3113 work->id = id_priv; 3114 work->mc = mc; 3115 INIT_WORK(&work->work, iboe_mcast_work_handler); 3116 kref_get(&mc->mcref); 3117 queue_work(cma_wq, &work->work); 3118 3119 return 0; 3120 3121 out2: 3122 kfree(mc->multicast.ib); 3123 out1: 3124 kfree(work); 3125 return err; 3126 } 3127 3128 int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr, 3129 void *context) 3130 { 3131 struct rdma_id_private *id_priv; 3132 struct cma_multicast *mc; 3133 int ret; 3134 3135 id_priv = container_of(id, struct rdma_id_private, id); 3136 if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) && 3137 !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED)) 3138 return -EINVAL; 3139 3140 mc = kmalloc(sizeof *mc, GFP_KERNEL); 3141 if (!mc) 3142 return -ENOMEM; 3143 3144 memcpy(&mc->addr, addr, ip_addr_size(addr)); 3145 mc->context = context; 3146 mc->id_priv = id_priv; 3147 3148 spin_lock(&id_priv->lock); 3149 list_add(&mc->list, &id_priv->mc_list); 3150 spin_unlock(&id_priv->lock); 3151 3152 switch (rdma_node_get_transport(id->device->node_type)) { 3153 case RDMA_TRANSPORT_IB: 3154 switch (rdma_port_get_link_layer(id->device, id->port_num)) { 3155 case IB_LINK_LAYER_INFINIBAND: 3156 ret = cma_join_ib_multicast(id_priv, mc); 3157 break; 3158 case IB_LINK_LAYER_ETHERNET: 3159 kref_init(&mc->mcref); 3160 ret = cma_iboe_join_multicast(id_priv, mc); 3161 break; 3162 default: 3163 ret = -EINVAL; 3164 } 3165 break; 3166 default: 3167 ret = -ENOSYS; 3168 break; 3169 } 3170 3171 if (ret) { 3172 spin_lock_irq(&id_priv->lock); 3173 list_del(&mc->list); 3174 spin_unlock_irq(&id_priv->lock); 3175 kfree(mc); 3176 } 3177 return ret; 3178 } 3179 EXPORT_SYMBOL(rdma_join_multicast); 3180 3181 void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr) 3182 { 3183 struct rdma_id_private *id_priv; 3184 struct cma_multicast *mc; 3185 3186 id_priv = container_of(id, struct rdma_id_private, id); 3187 spin_lock_irq(&id_priv->lock); 3188 list_for_each_entry(mc, &id_priv->mc_list, list) { 3189 if (!memcmp(&mc->addr, addr, ip_addr_size(addr))) { 3190 list_del(&mc->list); 3191 spin_unlock_irq(&id_priv->lock); 3192 3193 if (id->qp) 3194 ib_detach_mcast(id->qp, 3195 &mc->multicast.ib->rec.mgid, 3196 be16_to_cpu(mc->multicast.ib->rec.mlid)); 3197 if (rdma_node_get_transport(id_priv->cma_dev->device->node_type) == RDMA_TRANSPORT_IB) { 3198 switch (rdma_port_get_link_layer(id->device, id->port_num)) { 3199 case IB_LINK_LAYER_INFINIBAND: 3200 ib_sa_free_multicast(mc->multicast.ib); 3201 kfree(mc); 3202 break; 3203 case IB_LINK_LAYER_ETHERNET: 3204 kref_put(&mc->mcref, release_mc); 3205 break; 3206 default: 3207 break; 3208 } 3209 } 3210 return; 3211 } 3212 } 3213 spin_unlock_irq(&id_priv->lock); 3214 } 3215 EXPORT_SYMBOL(rdma_leave_multicast); 3216 3217 static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv) 3218 { 3219 struct rdma_dev_addr *dev_addr; 3220 struct cma_ndev_work *work; 3221 3222 dev_addr = &id_priv->id.route.addr.dev_addr; 3223 3224 if ((dev_addr->bound_dev_if == ndev->ifindex) && 3225 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) { 3226 printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n", 3227 ndev->name, &id_priv->id); 3228 work = kzalloc(sizeof *work, GFP_KERNEL); 3229 if (!work) 3230 return -ENOMEM; 3231 3232 INIT_WORK(&work->work, cma_ndev_work_handler); 3233 work->id = id_priv; 3234 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE; 3235 atomic_inc(&id_priv->refcount); 3236 queue_work(cma_wq, &work->work); 3237 } 3238 3239 return 0; 3240 } 3241 3242 static int cma_netdev_callback(struct notifier_block *self, unsigned long event, 3243 void *ctx) 3244 { 3245 struct net_device *ndev = (struct net_device *)ctx; 3246 struct cma_device *cma_dev; 3247 struct rdma_id_private *id_priv; 3248 int ret = NOTIFY_DONE; 3249 3250 if (dev_net(ndev) != &init_net) 3251 return NOTIFY_DONE; 3252 3253 if (event != NETDEV_BONDING_FAILOVER) 3254 return NOTIFY_DONE; 3255 3256 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING)) 3257 return NOTIFY_DONE; 3258 3259 mutex_lock(&lock); 3260 list_for_each_entry(cma_dev, &dev_list, list) 3261 list_for_each_entry(id_priv, &cma_dev->id_list, list) { 3262 ret = cma_netdev_change(ndev, id_priv); 3263 if (ret) 3264 goto out; 3265 } 3266 3267 out: 3268 mutex_unlock(&lock); 3269 return ret; 3270 } 3271 3272 static struct notifier_block cma_nb = { 3273 .notifier_call = cma_netdev_callback 3274 }; 3275 3276 static void cma_add_one(struct ib_device *device) 3277 { 3278 struct cma_device *cma_dev; 3279 struct rdma_id_private *id_priv; 3280 3281 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL); 3282 if (!cma_dev) 3283 return; 3284 3285 cma_dev->device = device; 3286 3287 init_completion(&cma_dev->comp); 3288 atomic_set(&cma_dev->refcount, 1); 3289 INIT_LIST_HEAD(&cma_dev->id_list); 3290 ib_set_client_data(device, &cma_client, cma_dev); 3291 3292 mutex_lock(&lock); 3293 list_add_tail(&cma_dev->list, &dev_list); 3294 list_for_each_entry(id_priv, &listen_any_list, list) 3295 cma_listen_on_dev(id_priv, cma_dev); 3296 mutex_unlock(&lock); 3297 } 3298 3299 static int cma_remove_id_dev(struct rdma_id_private *id_priv) 3300 { 3301 struct rdma_cm_event event; 3302 enum rdma_cm_state state; 3303 int ret = 0; 3304 3305 /* Record that we want to remove the device */ 3306 state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL); 3307 if (state == RDMA_CM_DESTROYING) 3308 return 0; 3309 3310 cma_cancel_operation(id_priv, state); 3311 mutex_lock(&id_priv->handler_mutex); 3312 3313 /* Check for destruction from another callback. */ 3314 if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL)) 3315 goto out; 3316 3317 memset(&event, 0, sizeof event); 3318 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL; 3319 ret = id_priv->id.event_handler(&id_priv->id, &event); 3320 out: 3321 mutex_unlock(&id_priv->handler_mutex); 3322 return ret; 3323 } 3324 3325 static void cma_process_remove(struct cma_device *cma_dev) 3326 { 3327 struct rdma_id_private *id_priv; 3328 int ret; 3329 3330 mutex_lock(&lock); 3331 while (!list_empty(&cma_dev->id_list)) { 3332 id_priv = list_entry(cma_dev->id_list.next, 3333 struct rdma_id_private, list); 3334 3335 list_del(&id_priv->listen_list); 3336 list_del_init(&id_priv->list); 3337 atomic_inc(&id_priv->refcount); 3338 mutex_unlock(&lock); 3339 3340 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv); 3341 cma_deref_id(id_priv); 3342 if (ret) 3343 rdma_destroy_id(&id_priv->id); 3344 3345 mutex_lock(&lock); 3346 } 3347 mutex_unlock(&lock); 3348 3349 cma_deref_dev(cma_dev); 3350 wait_for_completion(&cma_dev->comp); 3351 } 3352 3353 static void cma_remove_one(struct ib_device *device) 3354 { 3355 struct cma_device *cma_dev; 3356 3357 cma_dev = ib_get_client_data(device, &cma_client); 3358 if (!cma_dev) 3359 return; 3360 3361 mutex_lock(&lock); 3362 list_del(&cma_dev->list); 3363 mutex_unlock(&lock); 3364 3365 cma_process_remove(cma_dev); 3366 kfree(cma_dev); 3367 } 3368 3369 static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb) 3370 { 3371 struct nlmsghdr *nlh; 3372 struct rdma_cm_id_stats *id_stats; 3373 struct rdma_id_private *id_priv; 3374 struct rdma_cm_id *id = NULL; 3375 struct cma_device *cma_dev; 3376 int i_dev = 0, i_id = 0; 3377 3378 /* 3379 * We export all of the IDs as a sequence of messages. Each 3380 * ID gets its own netlink message. 3381 */ 3382 mutex_lock(&lock); 3383 3384 list_for_each_entry(cma_dev, &dev_list, list) { 3385 if (i_dev < cb->args[0]) { 3386 i_dev++; 3387 continue; 3388 } 3389 3390 i_id = 0; 3391 list_for_each_entry(id_priv, &cma_dev->id_list, list) { 3392 if (i_id < cb->args[1]) { 3393 i_id++; 3394 continue; 3395 } 3396 3397 id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq, 3398 sizeof *id_stats, RDMA_NL_RDMA_CM, 3399 RDMA_NL_RDMA_CM_ID_STATS); 3400 if (!id_stats) 3401 goto out; 3402 3403 memset(id_stats, 0, sizeof *id_stats); 3404 id = &id_priv->id; 3405 id_stats->node_type = id->route.addr.dev_addr.dev_type; 3406 id_stats->port_num = id->port_num; 3407 id_stats->bound_dev_if = 3408 id->route.addr.dev_addr.bound_dev_if; 3409 3410 if (id->route.addr.src_addr.ss_family == AF_INET) { 3411 if (ibnl_put_attr(skb, nlh, 3412 sizeof(struct sockaddr_in), 3413 &id->route.addr.src_addr, 3414 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR)) { 3415 goto out; 3416 } 3417 if (ibnl_put_attr(skb, nlh, 3418 sizeof(struct sockaddr_in), 3419 &id->route.addr.dst_addr, 3420 RDMA_NL_RDMA_CM_ATTR_DST_ADDR)) { 3421 goto out; 3422 } 3423 } else if (id->route.addr.src_addr.ss_family == AF_INET6) { 3424 if (ibnl_put_attr(skb, nlh, 3425 sizeof(struct sockaddr_in6), 3426 &id->route.addr.src_addr, 3427 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR)) { 3428 goto out; 3429 } 3430 if (ibnl_put_attr(skb, nlh, 3431 sizeof(struct sockaddr_in6), 3432 &id->route.addr.dst_addr, 3433 RDMA_NL_RDMA_CM_ATTR_DST_ADDR)) { 3434 goto out; 3435 } 3436 } 3437 3438 id_stats->pid = id_priv->owner; 3439 id_stats->port_space = id->ps; 3440 id_stats->cm_state = id_priv->state; 3441 id_stats->qp_num = id_priv->qp_num; 3442 id_stats->qp_type = id->qp_type; 3443 3444 i_id++; 3445 } 3446 3447 cb->args[1] = 0; 3448 i_dev++; 3449 } 3450 3451 out: 3452 mutex_unlock(&lock); 3453 cb->args[0] = i_dev; 3454 cb->args[1] = i_id; 3455 3456 return skb->len; 3457 } 3458 3459 static const struct ibnl_client_cbs cma_cb_table[] = { 3460 [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats }, 3461 }; 3462 3463 static int __init cma_init(void) 3464 { 3465 int ret; 3466 3467 cma_wq = create_singlethread_workqueue("rdma_cm"); 3468 if (!cma_wq) 3469 return -ENOMEM; 3470 3471 ib_sa_register_client(&sa_client); 3472 rdma_addr_register_client(&addr_client); 3473 register_netdevice_notifier(&cma_nb); 3474 3475 ret = ib_register_client(&cma_client); 3476 if (ret) 3477 goto err; 3478 3479 if (ibnl_add_client(RDMA_NL_RDMA_CM, RDMA_NL_RDMA_CM_NUM_OPS, cma_cb_table)) 3480 printk(KERN_WARNING "RDMA CMA: failed to add netlink callback\n"); 3481 3482 return 0; 3483 3484 err: 3485 unregister_netdevice_notifier(&cma_nb); 3486 rdma_addr_unregister_client(&addr_client); 3487 ib_sa_unregister_client(&sa_client); 3488 destroy_workqueue(cma_wq); 3489 return ret; 3490 } 3491 3492 static void __exit cma_cleanup(void) 3493 { 3494 ibnl_remove_client(RDMA_NL_RDMA_CM); 3495 ib_unregister_client(&cma_client); 3496 unregister_netdevice_notifier(&cma_nb); 3497 rdma_addr_unregister_client(&addr_client); 3498 ib_sa_unregister_client(&sa_client); 3499 destroy_workqueue(cma_wq); 3500 idr_destroy(&sdp_ps); 3501 idr_destroy(&tcp_ps); 3502 idr_destroy(&udp_ps); 3503 idr_destroy(&ipoib_ps); 3504 idr_destroy(&ib_ps); 3505 } 3506 3507 module_init(cma_init); 3508 module_exit(cma_cleanup); 3509