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 enum { 103 CMA_OPTION_AFONLY, 104 }; 105 106 /* 107 * Device removal can occur at anytime, so we need extra handling to 108 * serialize notifying the user of device removal with other callbacks. 109 * We do this by disabling removal notification while a callback is in process, 110 * and reporting it after the callback completes. 111 */ 112 struct rdma_id_private { 113 struct rdma_cm_id id; 114 115 struct rdma_bind_list *bind_list; 116 struct hlist_node node; 117 struct list_head list; /* listen_any_list or cma_device.list */ 118 struct list_head listen_list; /* per device listens */ 119 struct cma_device *cma_dev; 120 struct list_head mc_list; 121 122 int internal_id; 123 enum rdma_cm_state state; 124 spinlock_t lock; 125 struct mutex qp_mutex; 126 127 struct completion comp; 128 atomic_t refcount; 129 struct mutex handler_mutex; 130 131 int backlog; 132 int timeout_ms; 133 struct ib_sa_query *query; 134 int query_id; 135 union { 136 struct ib_cm_id *ib; 137 struct iw_cm_id *iw; 138 } cm_id; 139 140 u32 seq_num; 141 u32 qkey; 142 u32 qp_num; 143 pid_t owner; 144 u32 options; 145 u8 srq; 146 u8 tos; 147 u8 reuseaddr; 148 u8 afonly; 149 }; 150 151 struct cma_multicast { 152 struct rdma_id_private *id_priv; 153 union { 154 struct ib_sa_multicast *ib; 155 } multicast; 156 struct list_head list; 157 void *context; 158 struct sockaddr_storage addr; 159 struct kref mcref; 160 }; 161 162 struct cma_work { 163 struct work_struct work; 164 struct rdma_id_private *id; 165 enum rdma_cm_state old_state; 166 enum rdma_cm_state new_state; 167 struct rdma_cm_event event; 168 }; 169 170 struct cma_ndev_work { 171 struct work_struct work; 172 struct rdma_id_private *id; 173 struct rdma_cm_event event; 174 }; 175 176 struct iboe_mcast_work { 177 struct work_struct work; 178 struct rdma_id_private *id; 179 struct cma_multicast *mc; 180 }; 181 182 union cma_ip_addr { 183 struct in6_addr ip6; 184 struct { 185 __be32 pad[3]; 186 __be32 addr; 187 } ip4; 188 }; 189 190 struct cma_hdr { 191 u8 cma_version; 192 u8 ip_version; /* IP version: 7:4 */ 193 __be16 port; 194 union cma_ip_addr src_addr; 195 union cma_ip_addr dst_addr; 196 }; 197 198 struct sdp_hh { 199 u8 bsdh[16]; 200 u8 sdp_version; /* Major version: 7:4 */ 201 u8 ip_version; /* IP version: 7:4 */ 202 u8 sdp_specific1[10]; 203 __be16 port; 204 __be16 sdp_specific2; 205 union cma_ip_addr src_addr; 206 union cma_ip_addr dst_addr; 207 }; 208 209 struct sdp_hah { 210 u8 bsdh[16]; 211 u8 sdp_version; 212 }; 213 214 #define CMA_VERSION 0x00 215 #define SDP_MAJ_VERSION 0x2 216 217 static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp) 218 { 219 unsigned long flags; 220 int ret; 221 222 spin_lock_irqsave(&id_priv->lock, flags); 223 ret = (id_priv->state == comp); 224 spin_unlock_irqrestore(&id_priv->lock, flags); 225 return ret; 226 } 227 228 static int cma_comp_exch(struct rdma_id_private *id_priv, 229 enum rdma_cm_state comp, enum rdma_cm_state exch) 230 { 231 unsigned long flags; 232 int ret; 233 234 spin_lock_irqsave(&id_priv->lock, flags); 235 if ((ret = (id_priv->state == comp))) 236 id_priv->state = exch; 237 spin_unlock_irqrestore(&id_priv->lock, flags); 238 return ret; 239 } 240 241 static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv, 242 enum rdma_cm_state exch) 243 { 244 unsigned long flags; 245 enum rdma_cm_state old; 246 247 spin_lock_irqsave(&id_priv->lock, flags); 248 old = id_priv->state; 249 id_priv->state = exch; 250 spin_unlock_irqrestore(&id_priv->lock, flags); 251 return old; 252 } 253 254 static inline u8 cma_get_ip_ver(struct cma_hdr *hdr) 255 { 256 return hdr->ip_version >> 4; 257 } 258 259 static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver) 260 { 261 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF); 262 } 263 264 static inline u8 sdp_get_majv(u8 sdp_version) 265 { 266 return sdp_version >> 4; 267 } 268 269 static inline u8 sdp_get_ip_ver(struct sdp_hh *hh) 270 { 271 return hh->ip_version >> 4; 272 } 273 274 static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver) 275 { 276 hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF); 277 } 278 279 static void cma_attach_to_dev(struct rdma_id_private *id_priv, 280 struct cma_device *cma_dev) 281 { 282 atomic_inc(&cma_dev->refcount); 283 id_priv->cma_dev = cma_dev; 284 id_priv->id.device = cma_dev->device; 285 id_priv->id.route.addr.dev_addr.transport = 286 rdma_node_get_transport(cma_dev->device->node_type); 287 list_add_tail(&id_priv->list, &cma_dev->id_list); 288 } 289 290 static inline void cma_deref_dev(struct cma_device *cma_dev) 291 { 292 if (atomic_dec_and_test(&cma_dev->refcount)) 293 complete(&cma_dev->comp); 294 } 295 296 static inline void release_mc(struct kref *kref) 297 { 298 struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref); 299 300 kfree(mc->multicast.ib); 301 kfree(mc); 302 } 303 304 static void cma_release_dev(struct rdma_id_private *id_priv) 305 { 306 mutex_lock(&lock); 307 list_del(&id_priv->list); 308 cma_deref_dev(id_priv->cma_dev); 309 id_priv->cma_dev = NULL; 310 mutex_unlock(&lock); 311 } 312 313 static int cma_set_qkey(struct rdma_id_private *id_priv) 314 { 315 struct ib_sa_mcmember_rec rec; 316 int ret = 0; 317 318 if (id_priv->qkey) 319 return 0; 320 321 switch (id_priv->id.ps) { 322 case RDMA_PS_UDP: 323 id_priv->qkey = RDMA_UDP_QKEY; 324 break; 325 case RDMA_PS_IPOIB: 326 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid); 327 ret = ib_sa_get_mcmember_rec(id_priv->id.device, 328 id_priv->id.port_num, &rec.mgid, 329 &rec); 330 if (!ret) 331 id_priv->qkey = be32_to_cpu(rec.qkey); 332 break; 333 default: 334 break; 335 } 336 return ret; 337 } 338 339 static int find_gid_port(struct ib_device *device, union ib_gid *gid, u8 port_num) 340 { 341 int i; 342 int err; 343 struct ib_port_attr props; 344 union ib_gid tmp; 345 346 err = ib_query_port(device, port_num, &props); 347 if (err) 348 return 1; 349 350 for (i = 0; i < props.gid_tbl_len; ++i) { 351 err = ib_query_gid(device, port_num, i, &tmp); 352 if (err) 353 return 1; 354 if (!memcmp(&tmp, gid, sizeof tmp)) 355 return 0; 356 } 357 358 return -EAGAIN; 359 } 360 361 static int cma_acquire_dev(struct rdma_id_private *id_priv) 362 { 363 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 364 struct cma_device *cma_dev; 365 union ib_gid gid, iboe_gid; 366 int ret = -ENODEV; 367 u8 port; 368 enum rdma_link_layer dev_ll = dev_addr->dev_type == ARPHRD_INFINIBAND ? 369 IB_LINK_LAYER_INFINIBAND : IB_LINK_LAYER_ETHERNET; 370 371 if (dev_ll != IB_LINK_LAYER_INFINIBAND && 372 id_priv->id.ps == RDMA_PS_IPOIB) 373 return -EINVAL; 374 375 mutex_lock(&lock); 376 iboe_addr_get_sgid(dev_addr, &iboe_gid); 377 memcpy(&gid, dev_addr->src_dev_addr + 378 rdma_addr_gid_offset(dev_addr), sizeof gid); 379 list_for_each_entry(cma_dev, &dev_list, list) { 380 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) { 381 if (rdma_port_get_link_layer(cma_dev->device, port) == dev_ll) { 382 if (rdma_node_get_transport(cma_dev->device->node_type) == RDMA_TRANSPORT_IB && 383 rdma_port_get_link_layer(cma_dev->device, port) == IB_LINK_LAYER_ETHERNET) 384 ret = find_gid_port(cma_dev->device, &iboe_gid, port); 385 else 386 ret = find_gid_port(cma_dev->device, &gid, port); 387 388 if (!ret) { 389 id_priv->id.port_num = port; 390 goto out; 391 } else if (ret == 1) 392 break; 393 } 394 } 395 } 396 397 out: 398 if (!ret) 399 cma_attach_to_dev(id_priv, cma_dev); 400 401 mutex_unlock(&lock); 402 return ret; 403 } 404 405 static void cma_deref_id(struct rdma_id_private *id_priv) 406 { 407 if (atomic_dec_and_test(&id_priv->refcount)) 408 complete(&id_priv->comp); 409 } 410 411 static int cma_disable_callback(struct rdma_id_private *id_priv, 412 enum rdma_cm_state state) 413 { 414 mutex_lock(&id_priv->handler_mutex); 415 if (id_priv->state != state) { 416 mutex_unlock(&id_priv->handler_mutex); 417 return -EINVAL; 418 } 419 return 0; 420 } 421 422 struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler, 423 void *context, enum rdma_port_space ps, 424 enum ib_qp_type qp_type) 425 { 426 struct rdma_id_private *id_priv; 427 428 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL); 429 if (!id_priv) 430 return ERR_PTR(-ENOMEM); 431 432 id_priv->owner = task_pid_nr(current); 433 id_priv->state = RDMA_CM_IDLE; 434 id_priv->id.context = context; 435 id_priv->id.event_handler = event_handler; 436 id_priv->id.ps = ps; 437 id_priv->id.qp_type = qp_type; 438 spin_lock_init(&id_priv->lock); 439 mutex_init(&id_priv->qp_mutex); 440 init_completion(&id_priv->comp); 441 atomic_set(&id_priv->refcount, 1); 442 mutex_init(&id_priv->handler_mutex); 443 INIT_LIST_HEAD(&id_priv->listen_list); 444 INIT_LIST_HEAD(&id_priv->mc_list); 445 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num); 446 447 return &id_priv->id; 448 } 449 EXPORT_SYMBOL(rdma_create_id); 450 451 static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp) 452 { 453 struct ib_qp_attr qp_attr; 454 int qp_attr_mask, ret; 455 456 qp_attr.qp_state = IB_QPS_INIT; 457 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 458 if (ret) 459 return ret; 460 461 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); 462 if (ret) 463 return ret; 464 465 qp_attr.qp_state = IB_QPS_RTR; 466 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE); 467 if (ret) 468 return ret; 469 470 qp_attr.qp_state = IB_QPS_RTS; 471 qp_attr.sq_psn = 0; 472 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN); 473 474 return ret; 475 } 476 477 static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp) 478 { 479 struct ib_qp_attr qp_attr; 480 int qp_attr_mask, ret; 481 482 qp_attr.qp_state = IB_QPS_INIT; 483 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 484 if (ret) 485 return ret; 486 487 return ib_modify_qp(qp, &qp_attr, qp_attr_mask); 488 } 489 490 int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd, 491 struct ib_qp_init_attr *qp_init_attr) 492 { 493 struct rdma_id_private *id_priv; 494 struct ib_qp *qp; 495 int ret; 496 497 id_priv = container_of(id, struct rdma_id_private, id); 498 if (id->device != pd->device) 499 return -EINVAL; 500 501 qp = ib_create_qp(pd, qp_init_attr); 502 if (IS_ERR(qp)) 503 return PTR_ERR(qp); 504 505 if (id->qp_type == IB_QPT_UD) 506 ret = cma_init_ud_qp(id_priv, qp); 507 else 508 ret = cma_init_conn_qp(id_priv, qp); 509 if (ret) 510 goto err; 511 512 id->qp = qp; 513 id_priv->qp_num = qp->qp_num; 514 id_priv->srq = (qp->srq != NULL); 515 return 0; 516 err: 517 ib_destroy_qp(qp); 518 return ret; 519 } 520 EXPORT_SYMBOL(rdma_create_qp); 521 522 void rdma_destroy_qp(struct rdma_cm_id *id) 523 { 524 struct rdma_id_private *id_priv; 525 526 id_priv = container_of(id, struct rdma_id_private, id); 527 mutex_lock(&id_priv->qp_mutex); 528 ib_destroy_qp(id_priv->id.qp); 529 id_priv->id.qp = NULL; 530 mutex_unlock(&id_priv->qp_mutex); 531 } 532 EXPORT_SYMBOL(rdma_destroy_qp); 533 534 static int cma_modify_qp_rtr(struct rdma_id_private *id_priv, 535 struct rdma_conn_param *conn_param) 536 { 537 struct ib_qp_attr qp_attr; 538 int qp_attr_mask, ret; 539 540 mutex_lock(&id_priv->qp_mutex); 541 if (!id_priv->id.qp) { 542 ret = 0; 543 goto out; 544 } 545 546 /* Need to update QP attributes from default values. */ 547 qp_attr.qp_state = IB_QPS_INIT; 548 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 549 if (ret) 550 goto out; 551 552 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); 553 if (ret) 554 goto out; 555 556 qp_attr.qp_state = IB_QPS_RTR; 557 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 558 if (ret) 559 goto out; 560 561 if (conn_param) 562 qp_attr.max_dest_rd_atomic = conn_param->responder_resources; 563 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); 564 out: 565 mutex_unlock(&id_priv->qp_mutex); 566 return ret; 567 } 568 569 static int cma_modify_qp_rts(struct rdma_id_private *id_priv, 570 struct rdma_conn_param *conn_param) 571 { 572 struct ib_qp_attr qp_attr; 573 int qp_attr_mask, ret; 574 575 mutex_lock(&id_priv->qp_mutex); 576 if (!id_priv->id.qp) { 577 ret = 0; 578 goto out; 579 } 580 581 qp_attr.qp_state = IB_QPS_RTS; 582 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 583 if (ret) 584 goto out; 585 586 if (conn_param) 587 qp_attr.max_rd_atomic = conn_param->initiator_depth; 588 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); 589 out: 590 mutex_unlock(&id_priv->qp_mutex); 591 return ret; 592 } 593 594 static int cma_modify_qp_err(struct rdma_id_private *id_priv) 595 { 596 struct ib_qp_attr qp_attr; 597 int ret; 598 599 mutex_lock(&id_priv->qp_mutex); 600 if (!id_priv->id.qp) { 601 ret = 0; 602 goto out; 603 } 604 605 qp_attr.qp_state = IB_QPS_ERR; 606 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE); 607 out: 608 mutex_unlock(&id_priv->qp_mutex); 609 return ret; 610 } 611 612 static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv, 613 struct ib_qp_attr *qp_attr, int *qp_attr_mask) 614 { 615 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 616 int ret; 617 u16 pkey; 618 619 if (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num) == 620 IB_LINK_LAYER_INFINIBAND) 621 pkey = ib_addr_get_pkey(dev_addr); 622 else 623 pkey = 0xffff; 624 625 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num, 626 pkey, &qp_attr->pkey_index); 627 if (ret) 628 return ret; 629 630 qp_attr->port_num = id_priv->id.port_num; 631 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT; 632 633 if (id_priv->id.qp_type == IB_QPT_UD) { 634 ret = cma_set_qkey(id_priv); 635 if (ret) 636 return ret; 637 638 qp_attr->qkey = id_priv->qkey; 639 *qp_attr_mask |= IB_QP_QKEY; 640 } else { 641 qp_attr->qp_access_flags = 0; 642 *qp_attr_mask |= IB_QP_ACCESS_FLAGS; 643 } 644 return 0; 645 } 646 647 int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr, 648 int *qp_attr_mask) 649 { 650 struct rdma_id_private *id_priv; 651 int ret = 0; 652 653 id_priv = container_of(id, struct rdma_id_private, id); 654 switch (rdma_node_get_transport(id_priv->id.device->node_type)) { 655 case RDMA_TRANSPORT_IB: 656 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD)) 657 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask); 658 else 659 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr, 660 qp_attr_mask); 661 if (qp_attr->qp_state == IB_QPS_RTR) 662 qp_attr->rq_psn = id_priv->seq_num; 663 break; 664 case RDMA_TRANSPORT_IWARP: 665 if (!id_priv->cm_id.iw) { 666 qp_attr->qp_access_flags = 0; 667 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS; 668 } else 669 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr, 670 qp_attr_mask); 671 break; 672 default: 673 ret = -ENOSYS; 674 break; 675 } 676 677 return ret; 678 } 679 EXPORT_SYMBOL(rdma_init_qp_attr); 680 681 static inline int cma_zero_addr(struct sockaddr *addr) 682 { 683 struct in6_addr *ip6; 684 685 if (addr->sa_family == AF_INET) 686 return ipv4_is_zeronet( 687 ((struct sockaddr_in *)addr)->sin_addr.s_addr); 688 else { 689 ip6 = &((struct sockaddr_in6 *) addr)->sin6_addr; 690 return (ip6->s6_addr32[0] | ip6->s6_addr32[1] | 691 ip6->s6_addr32[2] | ip6->s6_addr32[3]) == 0; 692 } 693 } 694 695 static inline int cma_loopback_addr(struct sockaddr *addr) 696 { 697 if (addr->sa_family == AF_INET) 698 return ipv4_is_loopback( 699 ((struct sockaddr_in *) addr)->sin_addr.s_addr); 700 else 701 return ipv6_addr_loopback( 702 &((struct sockaddr_in6 *) addr)->sin6_addr); 703 } 704 705 static inline int cma_any_addr(struct sockaddr *addr) 706 { 707 return cma_zero_addr(addr) || cma_loopback_addr(addr); 708 } 709 710 static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst) 711 { 712 if (src->sa_family != dst->sa_family) 713 return -1; 714 715 switch (src->sa_family) { 716 case AF_INET: 717 return ((struct sockaddr_in *) src)->sin_addr.s_addr != 718 ((struct sockaddr_in *) dst)->sin_addr.s_addr; 719 default: 720 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr, 721 &((struct sockaddr_in6 *) dst)->sin6_addr); 722 } 723 } 724 725 static inline __be16 cma_port(struct sockaddr *addr) 726 { 727 if (addr->sa_family == AF_INET) 728 return ((struct sockaddr_in *) addr)->sin_port; 729 else 730 return ((struct sockaddr_in6 *) addr)->sin6_port; 731 } 732 733 static inline int cma_any_port(struct sockaddr *addr) 734 { 735 return !cma_port(addr); 736 } 737 738 static int cma_get_net_info(void *hdr, enum rdma_port_space ps, 739 u8 *ip_ver, __be16 *port, 740 union cma_ip_addr **src, union cma_ip_addr **dst) 741 { 742 switch (ps) { 743 case RDMA_PS_SDP: 744 if (sdp_get_majv(((struct sdp_hh *) hdr)->sdp_version) != 745 SDP_MAJ_VERSION) 746 return -EINVAL; 747 748 *ip_ver = sdp_get_ip_ver(hdr); 749 *port = ((struct sdp_hh *) hdr)->port; 750 *src = &((struct sdp_hh *) hdr)->src_addr; 751 *dst = &((struct sdp_hh *) hdr)->dst_addr; 752 break; 753 default: 754 if (((struct cma_hdr *) hdr)->cma_version != CMA_VERSION) 755 return -EINVAL; 756 757 *ip_ver = cma_get_ip_ver(hdr); 758 *port = ((struct cma_hdr *) hdr)->port; 759 *src = &((struct cma_hdr *) hdr)->src_addr; 760 *dst = &((struct cma_hdr *) hdr)->dst_addr; 761 break; 762 } 763 764 if (*ip_ver != 4 && *ip_ver != 6) 765 return -EINVAL; 766 return 0; 767 } 768 769 static void cma_save_net_info(struct rdma_addr *addr, 770 struct rdma_addr *listen_addr, 771 u8 ip_ver, __be16 port, 772 union cma_ip_addr *src, union cma_ip_addr *dst) 773 { 774 struct sockaddr_in *listen4, *ip4; 775 struct sockaddr_in6 *listen6, *ip6; 776 777 switch (ip_ver) { 778 case 4: 779 listen4 = (struct sockaddr_in *) &listen_addr->src_addr; 780 ip4 = (struct sockaddr_in *) &addr->src_addr; 781 ip4->sin_family = listen4->sin_family; 782 ip4->sin_addr.s_addr = dst->ip4.addr; 783 ip4->sin_port = listen4->sin_port; 784 785 ip4 = (struct sockaddr_in *) &addr->dst_addr; 786 ip4->sin_family = listen4->sin_family; 787 ip4->sin_addr.s_addr = src->ip4.addr; 788 ip4->sin_port = port; 789 break; 790 case 6: 791 listen6 = (struct sockaddr_in6 *) &listen_addr->src_addr; 792 ip6 = (struct sockaddr_in6 *) &addr->src_addr; 793 ip6->sin6_family = listen6->sin6_family; 794 ip6->sin6_addr = dst->ip6; 795 ip6->sin6_port = listen6->sin6_port; 796 797 ip6 = (struct sockaddr_in6 *) &addr->dst_addr; 798 ip6->sin6_family = listen6->sin6_family; 799 ip6->sin6_addr = src->ip6; 800 ip6->sin6_port = port; 801 break; 802 default: 803 break; 804 } 805 } 806 807 static inline int cma_user_data_offset(enum rdma_port_space ps) 808 { 809 switch (ps) { 810 case RDMA_PS_SDP: 811 return 0; 812 default: 813 return sizeof(struct cma_hdr); 814 } 815 } 816 817 static void cma_cancel_route(struct rdma_id_private *id_priv) 818 { 819 switch (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num)) { 820 case IB_LINK_LAYER_INFINIBAND: 821 if (id_priv->query) 822 ib_sa_cancel_query(id_priv->query_id, id_priv->query); 823 break; 824 default: 825 break; 826 } 827 } 828 829 static void cma_cancel_listens(struct rdma_id_private *id_priv) 830 { 831 struct rdma_id_private *dev_id_priv; 832 833 /* 834 * Remove from listen_any_list to prevent added devices from spawning 835 * additional listen requests. 836 */ 837 mutex_lock(&lock); 838 list_del(&id_priv->list); 839 840 while (!list_empty(&id_priv->listen_list)) { 841 dev_id_priv = list_entry(id_priv->listen_list.next, 842 struct rdma_id_private, listen_list); 843 /* sync with device removal to avoid duplicate destruction */ 844 list_del_init(&dev_id_priv->list); 845 list_del(&dev_id_priv->listen_list); 846 mutex_unlock(&lock); 847 848 rdma_destroy_id(&dev_id_priv->id); 849 mutex_lock(&lock); 850 } 851 mutex_unlock(&lock); 852 } 853 854 static void cma_cancel_operation(struct rdma_id_private *id_priv, 855 enum rdma_cm_state state) 856 { 857 switch (state) { 858 case RDMA_CM_ADDR_QUERY: 859 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr); 860 break; 861 case RDMA_CM_ROUTE_QUERY: 862 cma_cancel_route(id_priv); 863 break; 864 case RDMA_CM_LISTEN: 865 if (cma_any_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr) 866 && !id_priv->cma_dev) 867 cma_cancel_listens(id_priv); 868 break; 869 default: 870 break; 871 } 872 } 873 874 static void cma_release_port(struct rdma_id_private *id_priv) 875 { 876 struct rdma_bind_list *bind_list = id_priv->bind_list; 877 878 if (!bind_list) 879 return; 880 881 mutex_lock(&lock); 882 hlist_del(&id_priv->node); 883 if (hlist_empty(&bind_list->owners)) { 884 idr_remove(bind_list->ps, bind_list->port); 885 kfree(bind_list); 886 } 887 mutex_unlock(&lock); 888 } 889 890 static void cma_leave_mc_groups(struct rdma_id_private *id_priv) 891 { 892 struct cma_multicast *mc; 893 894 while (!list_empty(&id_priv->mc_list)) { 895 mc = container_of(id_priv->mc_list.next, 896 struct cma_multicast, list); 897 list_del(&mc->list); 898 switch (rdma_port_get_link_layer(id_priv->cma_dev->device, id_priv->id.port_num)) { 899 case IB_LINK_LAYER_INFINIBAND: 900 ib_sa_free_multicast(mc->multicast.ib); 901 kfree(mc); 902 break; 903 case IB_LINK_LAYER_ETHERNET: 904 kref_put(&mc->mcref, release_mc); 905 break; 906 default: 907 break; 908 } 909 } 910 } 911 912 void rdma_destroy_id(struct rdma_cm_id *id) 913 { 914 struct rdma_id_private *id_priv; 915 enum rdma_cm_state state; 916 917 id_priv = container_of(id, struct rdma_id_private, id); 918 state = cma_exch(id_priv, RDMA_CM_DESTROYING); 919 cma_cancel_operation(id_priv, state); 920 921 /* 922 * Wait for any active callback to finish. New callbacks will find 923 * the id_priv state set to destroying and abort. 924 */ 925 mutex_lock(&id_priv->handler_mutex); 926 mutex_unlock(&id_priv->handler_mutex); 927 928 if (id_priv->cma_dev) { 929 switch (rdma_node_get_transport(id_priv->id.device->node_type)) { 930 case RDMA_TRANSPORT_IB: 931 if (id_priv->cm_id.ib) 932 ib_destroy_cm_id(id_priv->cm_id.ib); 933 break; 934 case RDMA_TRANSPORT_IWARP: 935 if (id_priv->cm_id.iw) 936 iw_destroy_cm_id(id_priv->cm_id.iw); 937 break; 938 default: 939 break; 940 } 941 cma_leave_mc_groups(id_priv); 942 cma_release_dev(id_priv); 943 } 944 945 cma_release_port(id_priv); 946 cma_deref_id(id_priv); 947 wait_for_completion(&id_priv->comp); 948 949 if (id_priv->internal_id) 950 cma_deref_id(id_priv->id.context); 951 952 kfree(id_priv->id.route.path_rec); 953 kfree(id_priv); 954 } 955 EXPORT_SYMBOL(rdma_destroy_id); 956 957 static int cma_rep_recv(struct rdma_id_private *id_priv) 958 { 959 int ret; 960 961 ret = cma_modify_qp_rtr(id_priv, NULL); 962 if (ret) 963 goto reject; 964 965 ret = cma_modify_qp_rts(id_priv, NULL); 966 if (ret) 967 goto reject; 968 969 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0); 970 if (ret) 971 goto reject; 972 973 return 0; 974 reject: 975 cma_modify_qp_err(id_priv); 976 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED, 977 NULL, 0, NULL, 0); 978 return ret; 979 } 980 981 static int cma_verify_rep(struct rdma_id_private *id_priv, void *data) 982 { 983 if (id_priv->id.ps == RDMA_PS_SDP && 984 sdp_get_majv(((struct sdp_hah *) data)->sdp_version) != 985 SDP_MAJ_VERSION) 986 return -EINVAL; 987 988 return 0; 989 } 990 991 static void cma_set_rep_event_data(struct rdma_cm_event *event, 992 struct ib_cm_rep_event_param *rep_data, 993 void *private_data) 994 { 995 event->param.conn.private_data = private_data; 996 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE; 997 event->param.conn.responder_resources = rep_data->responder_resources; 998 event->param.conn.initiator_depth = rep_data->initiator_depth; 999 event->param.conn.flow_control = rep_data->flow_control; 1000 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count; 1001 event->param.conn.srq = rep_data->srq; 1002 event->param.conn.qp_num = rep_data->remote_qpn; 1003 } 1004 1005 static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) 1006 { 1007 struct rdma_id_private *id_priv = cm_id->context; 1008 struct rdma_cm_event event; 1009 int ret = 0; 1010 1011 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT && 1012 cma_disable_callback(id_priv, RDMA_CM_CONNECT)) || 1013 (ib_event->event == IB_CM_TIMEWAIT_EXIT && 1014 cma_disable_callback(id_priv, RDMA_CM_DISCONNECT))) 1015 return 0; 1016 1017 memset(&event, 0, sizeof event); 1018 switch (ib_event->event) { 1019 case IB_CM_REQ_ERROR: 1020 case IB_CM_REP_ERROR: 1021 event.event = RDMA_CM_EVENT_UNREACHABLE; 1022 event.status = -ETIMEDOUT; 1023 break; 1024 case IB_CM_REP_RECEIVED: 1025 event.status = cma_verify_rep(id_priv, ib_event->private_data); 1026 if (event.status) 1027 event.event = RDMA_CM_EVENT_CONNECT_ERROR; 1028 else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) { 1029 event.status = cma_rep_recv(id_priv); 1030 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR : 1031 RDMA_CM_EVENT_ESTABLISHED; 1032 } else 1033 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE; 1034 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd, 1035 ib_event->private_data); 1036 break; 1037 case IB_CM_RTU_RECEIVED: 1038 case IB_CM_USER_ESTABLISHED: 1039 event.event = RDMA_CM_EVENT_ESTABLISHED; 1040 break; 1041 case IB_CM_DREQ_ERROR: 1042 event.status = -ETIMEDOUT; /* fall through */ 1043 case IB_CM_DREQ_RECEIVED: 1044 case IB_CM_DREP_RECEIVED: 1045 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT, 1046 RDMA_CM_DISCONNECT)) 1047 goto out; 1048 event.event = RDMA_CM_EVENT_DISCONNECTED; 1049 break; 1050 case IB_CM_TIMEWAIT_EXIT: 1051 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT; 1052 break; 1053 case IB_CM_MRA_RECEIVED: 1054 /* ignore event */ 1055 goto out; 1056 case IB_CM_REJ_RECEIVED: 1057 cma_modify_qp_err(id_priv); 1058 event.status = ib_event->param.rej_rcvd.reason; 1059 event.event = RDMA_CM_EVENT_REJECTED; 1060 event.param.conn.private_data = ib_event->private_data; 1061 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE; 1062 break; 1063 default: 1064 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n", 1065 ib_event->event); 1066 goto out; 1067 } 1068 1069 ret = id_priv->id.event_handler(&id_priv->id, &event); 1070 if (ret) { 1071 /* Destroy the CM ID by returning a non-zero value. */ 1072 id_priv->cm_id.ib = NULL; 1073 cma_exch(id_priv, RDMA_CM_DESTROYING); 1074 mutex_unlock(&id_priv->handler_mutex); 1075 rdma_destroy_id(&id_priv->id); 1076 return ret; 1077 } 1078 out: 1079 mutex_unlock(&id_priv->handler_mutex); 1080 return ret; 1081 } 1082 1083 static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id, 1084 struct ib_cm_event *ib_event) 1085 { 1086 struct rdma_id_private *id_priv; 1087 struct rdma_cm_id *id; 1088 struct rdma_route *rt; 1089 union cma_ip_addr *src, *dst; 1090 __be16 port; 1091 u8 ip_ver; 1092 int ret; 1093 1094 if (cma_get_net_info(ib_event->private_data, listen_id->ps, 1095 &ip_ver, &port, &src, &dst)) 1096 return NULL; 1097 1098 id = rdma_create_id(listen_id->event_handler, listen_id->context, 1099 listen_id->ps, ib_event->param.req_rcvd.qp_type); 1100 if (IS_ERR(id)) 1101 return NULL; 1102 1103 cma_save_net_info(&id->route.addr, &listen_id->route.addr, 1104 ip_ver, port, src, dst); 1105 1106 rt = &id->route; 1107 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1; 1108 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths, 1109 GFP_KERNEL); 1110 if (!rt->path_rec) 1111 goto err; 1112 1113 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path; 1114 if (rt->num_paths == 2) 1115 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path; 1116 1117 if (cma_any_addr((struct sockaddr *) &rt->addr.src_addr)) { 1118 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND; 1119 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid); 1120 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey)); 1121 } else { 1122 ret = rdma_translate_ip((struct sockaddr *) &rt->addr.src_addr, 1123 &rt->addr.dev_addr); 1124 if (ret) 1125 goto err; 1126 } 1127 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid); 1128 1129 id_priv = container_of(id, struct rdma_id_private, id); 1130 id_priv->state = RDMA_CM_CONNECT; 1131 return id_priv; 1132 1133 err: 1134 rdma_destroy_id(id); 1135 return NULL; 1136 } 1137 1138 static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id, 1139 struct ib_cm_event *ib_event) 1140 { 1141 struct rdma_id_private *id_priv; 1142 struct rdma_cm_id *id; 1143 union cma_ip_addr *src, *dst; 1144 __be16 port; 1145 u8 ip_ver; 1146 int ret; 1147 1148 id = rdma_create_id(listen_id->event_handler, listen_id->context, 1149 listen_id->ps, IB_QPT_UD); 1150 if (IS_ERR(id)) 1151 return NULL; 1152 1153 1154 if (cma_get_net_info(ib_event->private_data, listen_id->ps, 1155 &ip_ver, &port, &src, &dst)) 1156 goto err; 1157 1158 cma_save_net_info(&id->route.addr, &listen_id->route.addr, 1159 ip_ver, port, src, dst); 1160 1161 if (!cma_any_addr((struct sockaddr *) &id->route.addr.src_addr)) { 1162 ret = rdma_translate_ip((struct sockaddr *) &id->route.addr.src_addr, 1163 &id->route.addr.dev_addr); 1164 if (ret) 1165 goto err; 1166 } 1167 1168 id_priv = container_of(id, struct rdma_id_private, id); 1169 id_priv->state = RDMA_CM_CONNECT; 1170 return id_priv; 1171 err: 1172 rdma_destroy_id(id); 1173 return NULL; 1174 } 1175 1176 static void cma_set_req_event_data(struct rdma_cm_event *event, 1177 struct ib_cm_req_event_param *req_data, 1178 void *private_data, int offset) 1179 { 1180 event->param.conn.private_data = private_data + offset; 1181 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset; 1182 event->param.conn.responder_resources = req_data->responder_resources; 1183 event->param.conn.initiator_depth = req_data->initiator_depth; 1184 event->param.conn.flow_control = req_data->flow_control; 1185 event->param.conn.retry_count = req_data->retry_count; 1186 event->param.conn.rnr_retry_count = req_data->rnr_retry_count; 1187 event->param.conn.srq = req_data->srq; 1188 event->param.conn.qp_num = req_data->remote_qpn; 1189 } 1190 1191 static int cma_check_req_qp_type(struct rdma_cm_id *id, struct ib_cm_event *ib_event) 1192 { 1193 return (((ib_event->event == IB_CM_REQ_RECEIVED) && 1194 (ib_event->param.req_rcvd.qp_type == id->qp_type)) || 1195 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) && 1196 (id->qp_type == IB_QPT_UD)) || 1197 (!id->qp_type)); 1198 } 1199 1200 static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) 1201 { 1202 struct rdma_id_private *listen_id, *conn_id; 1203 struct rdma_cm_event event; 1204 int offset, ret; 1205 1206 listen_id = cm_id->context; 1207 if (!cma_check_req_qp_type(&listen_id->id, ib_event)) 1208 return -EINVAL; 1209 1210 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN)) 1211 return -ECONNABORTED; 1212 1213 memset(&event, 0, sizeof event); 1214 offset = cma_user_data_offset(listen_id->id.ps); 1215 event.event = RDMA_CM_EVENT_CONNECT_REQUEST; 1216 if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) { 1217 conn_id = cma_new_udp_id(&listen_id->id, ib_event); 1218 event.param.ud.private_data = ib_event->private_data + offset; 1219 event.param.ud.private_data_len = 1220 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset; 1221 } else { 1222 conn_id = cma_new_conn_id(&listen_id->id, ib_event); 1223 cma_set_req_event_data(&event, &ib_event->param.req_rcvd, 1224 ib_event->private_data, offset); 1225 } 1226 if (!conn_id) { 1227 ret = -ENOMEM; 1228 goto err1; 1229 } 1230 1231 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING); 1232 ret = cma_acquire_dev(conn_id); 1233 if (ret) 1234 goto err2; 1235 1236 conn_id->cm_id.ib = cm_id; 1237 cm_id->context = conn_id; 1238 cm_id->cm_handler = cma_ib_handler; 1239 1240 /* 1241 * Protect against the user destroying conn_id from another thread 1242 * until we're done accessing it. 1243 */ 1244 atomic_inc(&conn_id->refcount); 1245 ret = conn_id->id.event_handler(&conn_id->id, &event); 1246 if (ret) 1247 goto err3; 1248 1249 /* 1250 * Acquire mutex to prevent user executing rdma_destroy_id() 1251 * while we're accessing the cm_id. 1252 */ 1253 mutex_lock(&lock); 1254 if (cma_comp(conn_id, RDMA_CM_CONNECT) && (conn_id->id.qp_type != IB_QPT_UD)) 1255 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0); 1256 mutex_unlock(&lock); 1257 mutex_unlock(&conn_id->handler_mutex); 1258 mutex_unlock(&listen_id->handler_mutex); 1259 cma_deref_id(conn_id); 1260 return 0; 1261 1262 err3: 1263 cma_deref_id(conn_id); 1264 /* Destroy the CM ID by returning a non-zero value. */ 1265 conn_id->cm_id.ib = NULL; 1266 err2: 1267 cma_exch(conn_id, RDMA_CM_DESTROYING); 1268 mutex_unlock(&conn_id->handler_mutex); 1269 err1: 1270 mutex_unlock(&listen_id->handler_mutex); 1271 if (conn_id) 1272 rdma_destroy_id(&conn_id->id); 1273 return ret; 1274 } 1275 1276 static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr) 1277 { 1278 return cpu_to_be64(((u64)ps << 16) + be16_to_cpu(cma_port(addr))); 1279 } 1280 1281 static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr, 1282 struct ib_cm_compare_data *compare) 1283 { 1284 struct cma_hdr *cma_data, *cma_mask; 1285 struct sdp_hh *sdp_data, *sdp_mask; 1286 __be32 ip4_addr; 1287 struct in6_addr ip6_addr; 1288 1289 memset(compare, 0, sizeof *compare); 1290 cma_data = (void *) compare->data; 1291 cma_mask = (void *) compare->mask; 1292 sdp_data = (void *) compare->data; 1293 sdp_mask = (void *) compare->mask; 1294 1295 switch (addr->sa_family) { 1296 case AF_INET: 1297 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr; 1298 if (ps == RDMA_PS_SDP) { 1299 sdp_set_ip_ver(sdp_data, 4); 1300 sdp_set_ip_ver(sdp_mask, 0xF); 1301 sdp_data->dst_addr.ip4.addr = ip4_addr; 1302 sdp_mask->dst_addr.ip4.addr = htonl(~0); 1303 } else { 1304 cma_set_ip_ver(cma_data, 4); 1305 cma_set_ip_ver(cma_mask, 0xF); 1306 if (!cma_any_addr(addr)) { 1307 cma_data->dst_addr.ip4.addr = ip4_addr; 1308 cma_mask->dst_addr.ip4.addr = htonl(~0); 1309 } 1310 } 1311 break; 1312 case AF_INET6: 1313 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr; 1314 if (ps == RDMA_PS_SDP) { 1315 sdp_set_ip_ver(sdp_data, 6); 1316 sdp_set_ip_ver(sdp_mask, 0xF); 1317 sdp_data->dst_addr.ip6 = ip6_addr; 1318 memset(&sdp_mask->dst_addr.ip6, 0xFF, 1319 sizeof sdp_mask->dst_addr.ip6); 1320 } else { 1321 cma_set_ip_ver(cma_data, 6); 1322 cma_set_ip_ver(cma_mask, 0xF); 1323 if (!cma_any_addr(addr)) { 1324 cma_data->dst_addr.ip6 = ip6_addr; 1325 memset(&cma_mask->dst_addr.ip6, 0xFF, 1326 sizeof cma_mask->dst_addr.ip6); 1327 } 1328 } 1329 break; 1330 default: 1331 break; 1332 } 1333 } 1334 1335 static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event) 1336 { 1337 struct rdma_id_private *id_priv = iw_id->context; 1338 struct rdma_cm_event event; 1339 struct sockaddr_in *sin; 1340 int ret = 0; 1341 1342 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT)) 1343 return 0; 1344 1345 memset(&event, 0, sizeof event); 1346 switch (iw_event->event) { 1347 case IW_CM_EVENT_CLOSE: 1348 event.event = RDMA_CM_EVENT_DISCONNECTED; 1349 break; 1350 case IW_CM_EVENT_CONNECT_REPLY: 1351 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; 1352 *sin = iw_event->local_addr; 1353 sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr; 1354 *sin = iw_event->remote_addr; 1355 switch (iw_event->status) { 1356 case 0: 1357 event.event = RDMA_CM_EVENT_ESTABLISHED; 1358 event.param.conn.initiator_depth = iw_event->ird; 1359 event.param.conn.responder_resources = iw_event->ord; 1360 break; 1361 case -ECONNRESET: 1362 case -ECONNREFUSED: 1363 event.event = RDMA_CM_EVENT_REJECTED; 1364 break; 1365 case -ETIMEDOUT: 1366 event.event = RDMA_CM_EVENT_UNREACHABLE; 1367 break; 1368 default: 1369 event.event = RDMA_CM_EVENT_CONNECT_ERROR; 1370 break; 1371 } 1372 break; 1373 case IW_CM_EVENT_ESTABLISHED: 1374 event.event = RDMA_CM_EVENT_ESTABLISHED; 1375 event.param.conn.initiator_depth = iw_event->ird; 1376 event.param.conn.responder_resources = iw_event->ord; 1377 break; 1378 default: 1379 BUG_ON(1); 1380 } 1381 1382 event.status = iw_event->status; 1383 event.param.conn.private_data = iw_event->private_data; 1384 event.param.conn.private_data_len = iw_event->private_data_len; 1385 ret = id_priv->id.event_handler(&id_priv->id, &event); 1386 if (ret) { 1387 /* Destroy the CM ID by returning a non-zero value. */ 1388 id_priv->cm_id.iw = NULL; 1389 cma_exch(id_priv, RDMA_CM_DESTROYING); 1390 mutex_unlock(&id_priv->handler_mutex); 1391 rdma_destroy_id(&id_priv->id); 1392 return ret; 1393 } 1394 1395 mutex_unlock(&id_priv->handler_mutex); 1396 return ret; 1397 } 1398 1399 static int iw_conn_req_handler(struct iw_cm_id *cm_id, 1400 struct iw_cm_event *iw_event) 1401 { 1402 struct rdma_cm_id *new_cm_id; 1403 struct rdma_id_private *listen_id, *conn_id; 1404 struct sockaddr_in *sin; 1405 struct net_device *dev = NULL; 1406 struct rdma_cm_event event; 1407 int ret; 1408 struct ib_device_attr attr; 1409 1410 listen_id = cm_id->context; 1411 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN)) 1412 return -ECONNABORTED; 1413 1414 /* Create a new RDMA id for the new IW CM ID */ 1415 new_cm_id = rdma_create_id(listen_id->id.event_handler, 1416 listen_id->id.context, 1417 RDMA_PS_TCP, IB_QPT_RC); 1418 if (IS_ERR(new_cm_id)) { 1419 ret = -ENOMEM; 1420 goto out; 1421 } 1422 conn_id = container_of(new_cm_id, struct rdma_id_private, id); 1423 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING); 1424 conn_id->state = RDMA_CM_CONNECT; 1425 1426 dev = ip_dev_find(&init_net, iw_event->local_addr.sin_addr.s_addr); 1427 if (!dev) { 1428 ret = -EADDRNOTAVAIL; 1429 mutex_unlock(&conn_id->handler_mutex); 1430 rdma_destroy_id(new_cm_id); 1431 goto out; 1432 } 1433 ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL); 1434 if (ret) { 1435 mutex_unlock(&conn_id->handler_mutex); 1436 rdma_destroy_id(new_cm_id); 1437 goto out; 1438 } 1439 1440 ret = cma_acquire_dev(conn_id); 1441 if (ret) { 1442 mutex_unlock(&conn_id->handler_mutex); 1443 rdma_destroy_id(new_cm_id); 1444 goto out; 1445 } 1446 1447 conn_id->cm_id.iw = cm_id; 1448 cm_id->context = conn_id; 1449 cm_id->cm_handler = cma_iw_handler; 1450 1451 sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr; 1452 *sin = iw_event->local_addr; 1453 sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr; 1454 *sin = iw_event->remote_addr; 1455 1456 ret = ib_query_device(conn_id->id.device, &attr); 1457 if (ret) { 1458 mutex_unlock(&conn_id->handler_mutex); 1459 rdma_destroy_id(new_cm_id); 1460 goto out; 1461 } 1462 1463 memset(&event, 0, sizeof event); 1464 event.event = RDMA_CM_EVENT_CONNECT_REQUEST; 1465 event.param.conn.private_data = iw_event->private_data; 1466 event.param.conn.private_data_len = iw_event->private_data_len; 1467 event.param.conn.initiator_depth = iw_event->ird; 1468 event.param.conn.responder_resources = iw_event->ord; 1469 1470 /* 1471 * Protect against the user destroying conn_id from another thread 1472 * until we're done accessing it. 1473 */ 1474 atomic_inc(&conn_id->refcount); 1475 ret = conn_id->id.event_handler(&conn_id->id, &event); 1476 if (ret) { 1477 /* User wants to destroy the CM ID */ 1478 conn_id->cm_id.iw = NULL; 1479 cma_exch(conn_id, RDMA_CM_DESTROYING); 1480 mutex_unlock(&conn_id->handler_mutex); 1481 cma_deref_id(conn_id); 1482 rdma_destroy_id(&conn_id->id); 1483 goto out; 1484 } 1485 1486 mutex_unlock(&conn_id->handler_mutex); 1487 cma_deref_id(conn_id); 1488 1489 out: 1490 if (dev) 1491 dev_put(dev); 1492 mutex_unlock(&listen_id->handler_mutex); 1493 return ret; 1494 } 1495 1496 static int cma_ib_listen(struct rdma_id_private *id_priv) 1497 { 1498 struct ib_cm_compare_data compare_data; 1499 struct sockaddr *addr; 1500 struct ib_cm_id *id; 1501 __be64 svc_id; 1502 int ret; 1503 1504 id = ib_create_cm_id(id_priv->id.device, cma_req_handler, id_priv); 1505 if (IS_ERR(id)) 1506 return PTR_ERR(id); 1507 1508 id_priv->cm_id.ib = id; 1509 1510 addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr; 1511 svc_id = cma_get_service_id(id_priv->id.ps, addr); 1512 if (cma_any_addr(addr) && !id_priv->afonly) 1513 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL); 1514 else { 1515 cma_set_compare_data(id_priv->id.ps, addr, &compare_data); 1516 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data); 1517 } 1518 1519 if (ret) { 1520 ib_destroy_cm_id(id_priv->cm_id.ib); 1521 id_priv->cm_id.ib = NULL; 1522 } 1523 1524 return ret; 1525 } 1526 1527 static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog) 1528 { 1529 int ret; 1530 struct sockaddr_in *sin; 1531 struct iw_cm_id *id; 1532 1533 id = iw_create_cm_id(id_priv->id.device, 1534 iw_conn_req_handler, 1535 id_priv); 1536 if (IS_ERR(id)) 1537 return PTR_ERR(id); 1538 1539 id_priv->cm_id.iw = id; 1540 1541 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; 1542 id_priv->cm_id.iw->local_addr = *sin; 1543 1544 ret = iw_cm_listen(id_priv->cm_id.iw, backlog); 1545 1546 if (ret) { 1547 iw_destroy_cm_id(id_priv->cm_id.iw); 1548 id_priv->cm_id.iw = NULL; 1549 } 1550 1551 return ret; 1552 } 1553 1554 static int cma_listen_handler(struct rdma_cm_id *id, 1555 struct rdma_cm_event *event) 1556 { 1557 struct rdma_id_private *id_priv = id->context; 1558 1559 id->context = id_priv->id.context; 1560 id->event_handler = id_priv->id.event_handler; 1561 return id_priv->id.event_handler(id, event); 1562 } 1563 1564 static void cma_listen_on_dev(struct rdma_id_private *id_priv, 1565 struct cma_device *cma_dev) 1566 { 1567 struct rdma_id_private *dev_id_priv; 1568 struct rdma_cm_id *id; 1569 int ret; 1570 1571 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps, 1572 id_priv->id.qp_type); 1573 if (IS_ERR(id)) 1574 return; 1575 1576 dev_id_priv = container_of(id, struct rdma_id_private, id); 1577 1578 dev_id_priv->state = RDMA_CM_ADDR_BOUND; 1579 memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr, 1580 ip_addr_size((struct sockaddr *) &id_priv->id.route.addr.src_addr)); 1581 1582 cma_attach_to_dev(dev_id_priv, cma_dev); 1583 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list); 1584 atomic_inc(&id_priv->refcount); 1585 dev_id_priv->internal_id = 1; 1586 dev_id_priv->afonly = id_priv->afonly; 1587 1588 ret = rdma_listen(id, id_priv->backlog); 1589 if (ret) 1590 printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, " 1591 "listening on device %s\n", ret, cma_dev->device->name); 1592 } 1593 1594 static void cma_listen_on_all(struct rdma_id_private *id_priv) 1595 { 1596 struct cma_device *cma_dev; 1597 1598 mutex_lock(&lock); 1599 list_add_tail(&id_priv->list, &listen_any_list); 1600 list_for_each_entry(cma_dev, &dev_list, list) 1601 cma_listen_on_dev(id_priv, cma_dev); 1602 mutex_unlock(&lock); 1603 } 1604 1605 void rdma_set_service_type(struct rdma_cm_id *id, int tos) 1606 { 1607 struct rdma_id_private *id_priv; 1608 1609 id_priv = container_of(id, struct rdma_id_private, id); 1610 id_priv->tos = (u8) tos; 1611 } 1612 EXPORT_SYMBOL(rdma_set_service_type); 1613 1614 static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec, 1615 void *context) 1616 { 1617 struct cma_work *work = context; 1618 struct rdma_route *route; 1619 1620 route = &work->id->id.route; 1621 1622 if (!status) { 1623 route->num_paths = 1; 1624 *route->path_rec = *path_rec; 1625 } else { 1626 work->old_state = RDMA_CM_ROUTE_QUERY; 1627 work->new_state = RDMA_CM_ADDR_RESOLVED; 1628 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR; 1629 work->event.status = status; 1630 } 1631 1632 queue_work(cma_wq, &work->work); 1633 } 1634 1635 static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms, 1636 struct cma_work *work) 1637 { 1638 struct rdma_addr *addr = &id_priv->id.route.addr; 1639 struct ib_sa_path_rec path_rec; 1640 ib_sa_comp_mask comp_mask; 1641 struct sockaddr_in6 *sin6; 1642 1643 memset(&path_rec, 0, sizeof path_rec); 1644 rdma_addr_get_sgid(&addr->dev_addr, &path_rec.sgid); 1645 rdma_addr_get_dgid(&addr->dev_addr, &path_rec.dgid); 1646 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(&addr->dev_addr)); 1647 path_rec.numb_path = 1; 1648 path_rec.reversible = 1; 1649 path_rec.service_id = cma_get_service_id(id_priv->id.ps, 1650 (struct sockaddr *) &addr->dst_addr); 1651 1652 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID | 1653 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH | 1654 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID; 1655 1656 if (addr->src_addr.ss_family == AF_INET) { 1657 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos); 1658 comp_mask |= IB_SA_PATH_REC_QOS_CLASS; 1659 } else { 1660 sin6 = (struct sockaddr_in6 *) &addr->src_addr; 1661 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20); 1662 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS; 1663 } 1664 1665 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device, 1666 id_priv->id.port_num, &path_rec, 1667 comp_mask, timeout_ms, 1668 GFP_KERNEL, cma_query_handler, 1669 work, &id_priv->query); 1670 1671 return (id_priv->query_id < 0) ? id_priv->query_id : 0; 1672 } 1673 1674 static void cma_work_handler(struct work_struct *_work) 1675 { 1676 struct cma_work *work = container_of(_work, struct cma_work, work); 1677 struct rdma_id_private *id_priv = work->id; 1678 int destroy = 0; 1679 1680 mutex_lock(&id_priv->handler_mutex); 1681 if (!cma_comp_exch(id_priv, work->old_state, work->new_state)) 1682 goto out; 1683 1684 if (id_priv->id.event_handler(&id_priv->id, &work->event)) { 1685 cma_exch(id_priv, RDMA_CM_DESTROYING); 1686 destroy = 1; 1687 } 1688 out: 1689 mutex_unlock(&id_priv->handler_mutex); 1690 cma_deref_id(id_priv); 1691 if (destroy) 1692 rdma_destroy_id(&id_priv->id); 1693 kfree(work); 1694 } 1695 1696 static void cma_ndev_work_handler(struct work_struct *_work) 1697 { 1698 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work); 1699 struct rdma_id_private *id_priv = work->id; 1700 int destroy = 0; 1701 1702 mutex_lock(&id_priv->handler_mutex); 1703 if (id_priv->state == RDMA_CM_DESTROYING || 1704 id_priv->state == RDMA_CM_DEVICE_REMOVAL) 1705 goto out; 1706 1707 if (id_priv->id.event_handler(&id_priv->id, &work->event)) { 1708 cma_exch(id_priv, RDMA_CM_DESTROYING); 1709 destroy = 1; 1710 } 1711 1712 out: 1713 mutex_unlock(&id_priv->handler_mutex); 1714 cma_deref_id(id_priv); 1715 if (destroy) 1716 rdma_destroy_id(&id_priv->id); 1717 kfree(work); 1718 } 1719 1720 static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms) 1721 { 1722 struct rdma_route *route = &id_priv->id.route; 1723 struct cma_work *work; 1724 int ret; 1725 1726 work = kzalloc(sizeof *work, GFP_KERNEL); 1727 if (!work) 1728 return -ENOMEM; 1729 1730 work->id = id_priv; 1731 INIT_WORK(&work->work, cma_work_handler); 1732 work->old_state = RDMA_CM_ROUTE_QUERY; 1733 work->new_state = RDMA_CM_ROUTE_RESOLVED; 1734 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 1735 1736 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL); 1737 if (!route->path_rec) { 1738 ret = -ENOMEM; 1739 goto err1; 1740 } 1741 1742 ret = cma_query_ib_route(id_priv, timeout_ms, work); 1743 if (ret) 1744 goto err2; 1745 1746 return 0; 1747 err2: 1748 kfree(route->path_rec); 1749 route->path_rec = NULL; 1750 err1: 1751 kfree(work); 1752 return ret; 1753 } 1754 1755 int rdma_set_ib_paths(struct rdma_cm_id *id, 1756 struct ib_sa_path_rec *path_rec, int num_paths) 1757 { 1758 struct rdma_id_private *id_priv; 1759 int ret; 1760 1761 id_priv = container_of(id, struct rdma_id_private, id); 1762 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, 1763 RDMA_CM_ROUTE_RESOLVED)) 1764 return -EINVAL; 1765 1766 id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths, 1767 GFP_KERNEL); 1768 if (!id->route.path_rec) { 1769 ret = -ENOMEM; 1770 goto err; 1771 } 1772 1773 id->route.num_paths = num_paths; 1774 return 0; 1775 err: 1776 cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED); 1777 return ret; 1778 } 1779 EXPORT_SYMBOL(rdma_set_ib_paths); 1780 1781 static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms) 1782 { 1783 struct cma_work *work; 1784 1785 work = kzalloc(sizeof *work, GFP_KERNEL); 1786 if (!work) 1787 return -ENOMEM; 1788 1789 work->id = id_priv; 1790 INIT_WORK(&work->work, cma_work_handler); 1791 work->old_state = RDMA_CM_ROUTE_QUERY; 1792 work->new_state = RDMA_CM_ROUTE_RESOLVED; 1793 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 1794 queue_work(cma_wq, &work->work); 1795 return 0; 1796 } 1797 1798 static int cma_resolve_iboe_route(struct rdma_id_private *id_priv) 1799 { 1800 struct rdma_route *route = &id_priv->id.route; 1801 struct rdma_addr *addr = &route->addr; 1802 struct cma_work *work; 1803 int ret; 1804 struct sockaddr_in *src_addr = (struct sockaddr_in *)&route->addr.src_addr; 1805 struct sockaddr_in *dst_addr = (struct sockaddr_in *)&route->addr.dst_addr; 1806 struct net_device *ndev = NULL; 1807 u16 vid; 1808 1809 if (src_addr->sin_family != dst_addr->sin_family) 1810 return -EINVAL; 1811 1812 work = kzalloc(sizeof *work, GFP_KERNEL); 1813 if (!work) 1814 return -ENOMEM; 1815 1816 work->id = id_priv; 1817 INIT_WORK(&work->work, cma_work_handler); 1818 1819 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL); 1820 if (!route->path_rec) { 1821 ret = -ENOMEM; 1822 goto err1; 1823 } 1824 1825 route->num_paths = 1; 1826 1827 if (addr->dev_addr.bound_dev_if) 1828 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if); 1829 if (!ndev) { 1830 ret = -ENODEV; 1831 goto err2; 1832 } 1833 1834 vid = rdma_vlan_dev_vlan_id(ndev); 1835 1836 iboe_mac_vlan_to_ll(&route->path_rec->sgid, addr->dev_addr.src_dev_addr, vid); 1837 iboe_mac_vlan_to_ll(&route->path_rec->dgid, addr->dev_addr.dst_dev_addr, vid); 1838 1839 route->path_rec->hop_limit = 1; 1840 route->path_rec->reversible = 1; 1841 route->path_rec->pkey = cpu_to_be16(0xffff); 1842 route->path_rec->mtu_selector = IB_SA_EQ; 1843 route->path_rec->sl = netdev_get_prio_tc_map( 1844 ndev->priv_flags & IFF_802_1Q_VLAN ? 1845 vlan_dev_real_dev(ndev) : ndev, 1846 rt_tos2priority(id_priv->tos)); 1847 1848 route->path_rec->mtu = iboe_get_mtu(ndev->mtu); 1849 route->path_rec->rate_selector = IB_SA_EQ; 1850 route->path_rec->rate = iboe_get_rate(ndev); 1851 dev_put(ndev); 1852 route->path_rec->packet_life_time_selector = IB_SA_EQ; 1853 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME; 1854 if (!route->path_rec->mtu) { 1855 ret = -EINVAL; 1856 goto err2; 1857 } 1858 1859 work->old_state = RDMA_CM_ROUTE_QUERY; 1860 work->new_state = RDMA_CM_ROUTE_RESOLVED; 1861 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 1862 work->event.status = 0; 1863 1864 queue_work(cma_wq, &work->work); 1865 1866 return 0; 1867 1868 err2: 1869 kfree(route->path_rec); 1870 route->path_rec = NULL; 1871 err1: 1872 kfree(work); 1873 return ret; 1874 } 1875 1876 int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms) 1877 { 1878 struct rdma_id_private *id_priv; 1879 int ret; 1880 1881 id_priv = container_of(id, struct rdma_id_private, id); 1882 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY)) 1883 return -EINVAL; 1884 1885 atomic_inc(&id_priv->refcount); 1886 switch (rdma_node_get_transport(id->device->node_type)) { 1887 case RDMA_TRANSPORT_IB: 1888 switch (rdma_port_get_link_layer(id->device, id->port_num)) { 1889 case IB_LINK_LAYER_INFINIBAND: 1890 ret = cma_resolve_ib_route(id_priv, timeout_ms); 1891 break; 1892 case IB_LINK_LAYER_ETHERNET: 1893 ret = cma_resolve_iboe_route(id_priv); 1894 break; 1895 default: 1896 ret = -ENOSYS; 1897 } 1898 break; 1899 case RDMA_TRANSPORT_IWARP: 1900 ret = cma_resolve_iw_route(id_priv, timeout_ms); 1901 break; 1902 default: 1903 ret = -ENOSYS; 1904 break; 1905 } 1906 if (ret) 1907 goto err; 1908 1909 return 0; 1910 err: 1911 cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED); 1912 cma_deref_id(id_priv); 1913 return ret; 1914 } 1915 EXPORT_SYMBOL(rdma_resolve_route); 1916 1917 static int cma_bind_loopback(struct rdma_id_private *id_priv) 1918 { 1919 struct cma_device *cma_dev; 1920 struct ib_port_attr port_attr; 1921 union ib_gid gid; 1922 u16 pkey; 1923 int ret; 1924 u8 p; 1925 1926 mutex_lock(&lock); 1927 if (list_empty(&dev_list)) { 1928 ret = -ENODEV; 1929 goto out; 1930 } 1931 list_for_each_entry(cma_dev, &dev_list, list) 1932 for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p) 1933 if (!ib_query_port(cma_dev->device, p, &port_attr) && 1934 port_attr.state == IB_PORT_ACTIVE) 1935 goto port_found; 1936 1937 p = 1; 1938 cma_dev = list_entry(dev_list.next, struct cma_device, list); 1939 1940 port_found: 1941 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid); 1942 if (ret) 1943 goto out; 1944 1945 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey); 1946 if (ret) 1947 goto out; 1948 1949 id_priv->id.route.addr.dev_addr.dev_type = 1950 (rdma_port_get_link_layer(cma_dev->device, p) == IB_LINK_LAYER_INFINIBAND) ? 1951 ARPHRD_INFINIBAND : ARPHRD_ETHER; 1952 1953 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid); 1954 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey); 1955 id_priv->id.port_num = p; 1956 cma_attach_to_dev(id_priv, cma_dev); 1957 out: 1958 mutex_unlock(&lock); 1959 return ret; 1960 } 1961 1962 static void addr_handler(int status, struct sockaddr *src_addr, 1963 struct rdma_dev_addr *dev_addr, void *context) 1964 { 1965 struct rdma_id_private *id_priv = context; 1966 struct rdma_cm_event event; 1967 1968 memset(&event, 0, sizeof event); 1969 mutex_lock(&id_priv->handler_mutex); 1970 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, 1971 RDMA_CM_ADDR_RESOLVED)) 1972 goto out; 1973 1974 if (!status && !id_priv->cma_dev) 1975 status = cma_acquire_dev(id_priv); 1976 1977 if (status) { 1978 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, 1979 RDMA_CM_ADDR_BOUND)) 1980 goto out; 1981 event.event = RDMA_CM_EVENT_ADDR_ERROR; 1982 event.status = status; 1983 } else { 1984 memcpy(&id_priv->id.route.addr.src_addr, src_addr, 1985 ip_addr_size(src_addr)); 1986 event.event = RDMA_CM_EVENT_ADDR_RESOLVED; 1987 } 1988 1989 if (id_priv->id.event_handler(&id_priv->id, &event)) { 1990 cma_exch(id_priv, RDMA_CM_DESTROYING); 1991 mutex_unlock(&id_priv->handler_mutex); 1992 cma_deref_id(id_priv); 1993 rdma_destroy_id(&id_priv->id); 1994 return; 1995 } 1996 out: 1997 mutex_unlock(&id_priv->handler_mutex); 1998 cma_deref_id(id_priv); 1999 } 2000 2001 static int cma_resolve_loopback(struct rdma_id_private *id_priv) 2002 { 2003 struct cma_work *work; 2004 struct sockaddr *src, *dst; 2005 union ib_gid gid; 2006 int ret; 2007 2008 work = kzalloc(sizeof *work, GFP_KERNEL); 2009 if (!work) 2010 return -ENOMEM; 2011 2012 if (!id_priv->cma_dev) { 2013 ret = cma_bind_loopback(id_priv); 2014 if (ret) 2015 goto err; 2016 } 2017 2018 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid); 2019 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid); 2020 2021 src = (struct sockaddr *) &id_priv->id.route.addr.src_addr; 2022 if (cma_zero_addr(src)) { 2023 dst = (struct sockaddr *) &id_priv->id.route.addr.dst_addr; 2024 if ((src->sa_family = dst->sa_family) == AF_INET) { 2025 ((struct sockaddr_in *)src)->sin_addr = 2026 ((struct sockaddr_in *)dst)->sin_addr; 2027 } else { 2028 ((struct sockaddr_in6 *)src)->sin6_addr = 2029 ((struct sockaddr_in6 *)dst)->sin6_addr; 2030 } 2031 } 2032 2033 work->id = id_priv; 2034 INIT_WORK(&work->work, cma_work_handler); 2035 work->old_state = RDMA_CM_ADDR_QUERY; 2036 work->new_state = RDMA_CM_ADDR_RESOLVED; 2037 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED; 2038 queue_work(cma_wq, &work->work); 2039 return 0; 2040 err: 2041 kfree(work); 2042 return ret; 2043 } 2044 2045 static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, 2046 struct sockaddr *dst_addr) 2047 { 2048 if (!src_addr || !src_addr->sa_family) { 2049 src_addr = (struct sockaddr *) &id->route.addr.src_addr; 2050 if ((src_addr->sa_family = dst_addr->sa_family) == AF_INET6) { 2051 ((struct sockaddr_in6 *) src_addr)->sin6_scope_id = 2052 ((struct sockaddr_in6 *) dst_addr)->sin6_scope_id; 2053 } 2054 } 2055 return rdma_bind_addr(id, src_addr); 2056 } 2057 2058 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, 2059 struct sockaddr *dst_addr, int timeout_ms) 2060 { 2061 struct rdma_id_private *id_priv; 2062 int ret; 2063 2064 id_priv = container_of(id, struct rdma_id_private, id); 2065 if (id_priv->state == RDMA_CM_IDLE) { 2066 ret = cma_bind_addr(id, src_addr, dst_addr); 2067 if (ret) 2068 return ret; 2069 } 2070 2071 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY)) 2072 return -EINVAL; 2073 2074 atomic_inc(&id_priv->refcount); 2075 memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr)); 2076 if (cma_any_addr(dst_addr)) 2077 ret = cma_resolve_loopback(id_priv); 2078 else 2079 ret = rdma_resolve_ip(&addr_client, (struct sockaddr *) &id->route.addr.src_addr, 2080 dst_addr, &id->route.addr.dev_addr, 2081 timeout_ms, addr_handler, id_priv); 2082 if (ret) 2083 goto err; 2084 2085 return 0; 2086 err: 2087 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND); 2088 cma_deref_id(id_priv); 2089 return ret; 2090 } 2091 EXPORT_SYMBOL(rdma_resolve_addr); 2092 2093 int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse) 2094 { 2095 struct rdma_id_private *id_priv; 2096 unsigned long flags; 2097 int ret; 2098 2099 id_priv = container_of(id, struct rdma_id_private, id); 2100 spin_lock_irqsave(&id_priv->lock, flags); 2101 if (id_priv->state == RDMA_CM_IDLE) { 2102 id_priv->reuseaddr = reuse; 2103 ret = 0; 2104 } else { 2105 ret = -EINVAL; 2106 } 2107 spin_unlock_irqrestore(&id_priv->lock, flags); 2108 return ret; 2109 } 2110 EXPORT_SYMBOL(rdma_set_reuseaddr); 2111 2112 int rdma_set_afonly(struct rdma_cm_id *id, int afonly) 2113 { 2114 struct rdma_id_private *id_priv; 2115 unsigned long flags; 2116 int ret; 2117 2118 id_priv = container_of(id, struct rdma_id_private, id); 2119 spin_lock_irqsave(&id_priv->lock, flags); 2120 if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) { 2121 id_priv->options |= (1 << CMA_OPTION_AFONLY); 2122 id_priv->afonly = afonly; 2123 ret = 0; 2124 } else { 2125 ret = -EINVAL; 2126 } 2127 spin_unlock_irqrestore(&id_priv->lock, flags); 2128 return ret; 2129 } 2130 EXPORT_SYMBOL(rdma_set_afonly); 2131 2132 static void cma_bind_port(struct rdma_bind_list *bind_list, 2133 struct rdma_id_private *id_priv) 2134 { 2135 struct sockaddr_in *sin; 2136 2137 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; 2138 sin->sin_port = htons(bind_list->port); 2139 id_priv->bind_list = bind_list; 2140 hlist_add_head(&id_priv->node, &bind_list->owners); 2141 } 2142 2143 static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv, 2144 unsigned short snum) 2145 { 2146 struct rdma_bind_list *bind_list; 2147 int port, ret; 2148 2149 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL); 2150 if (!bind_list) 2151 return -ENOMEM; 2152 2153 do { 2154 ret = idr_get_new_above(ps, bind_list, snum, &port); 2155 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL)); 2156 2157 if (ret) 2158 goto err1; 2159 2160 if (port != snum) { 2161 ret = -EADDRNOTAVAIL; 2162 goto err2; 2163 } 2164 2165 bind_list->ps = ps; 2166 bind_list->port = (unsigned short) port; 2167 cma_bind_port(bind_list, id_priv); 2168 return 0; 2169 err2: 2170 idr_remove(ps, port); 2171 err1: 2172 kfree(bind_list); 2173 return ret; 2174 } 2175 2176 static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv) 2177 { 2178 static unsigned int last_used_port; 2179 int low, high, remaining; 2180 unsigned int rover; 2181 2182 inet_get_local_port_range(&low, &high); 2183 remaining = (high - low) + 1; 2184 rover = net_random() % remaining + low; 2185 retry: 2186 if (last_used_port != rover && 2187 !idr_find(ps, (unsigned short) rover)) { 2188 int ret = cma_alloc_port(ps, id_priv, rover); 2189 /* 2190 * Remember previously used port number in order to avoid 2191 * re-using same port immediately after it is closed. 2192 */ 2193 if (!ret) 2194 last_used_port = rover; 2195 if (ret != -EADDRNOTAVAIL) 2196 return ret; 2197 } 2198 if (--remaining) { 2199 rover++; 2200 if ((rover < low) || (rover > high)) 2201 rover = low; 2202 goto retry; 2203 } 2204 return -EADDRNOTAVAIL; 2205 } 2206 2207 /* 2208 * Check that the requested port is available. This is called when trying to 2209 * bind to a specific port, or when trying to listen on a bound port. In 2210 * the latter case, the provided id_priv may already be on the bind_list, but 2211 * we still need to check that it's okay to start listening. 2212 */ 2213 static int cma_check_port(struct rdma_bind_list *bind_list, 2214 struct rdma_id_private *id_priv, uint8_t reuseaddr) 2215 { 2216 struct rdma_id_private *cur_id; 2217 struct sockaddr *addr, *cur_addr; 2218 struct hlist_node *node; 2219 2220 addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr; 2221 hlist_for_each_entry(cur_id, node, &bind_list->owners, node) { 2222 if (id_priv == cur_id) 2223 continue; 2224 2225 if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr && 2226 cur_id->reuseaddr) 2227 continue; 2228 2229 cur_addr = (struct sockaddr *) &cur_id->id.route.addr.src_addr; 2230 if (id_priv->afonly && cur_id->afonly && 2231 (addr->sa_family != cur_addr->sa_family)) 2232 continue; 2233 2234 if (cma_any_addr(addr) || cma_any_addr(cur_addr)) 2235 return -EADDRNOTAVAIL; 2236 2237 if (!cma_addr_cmp(addr, cur_addr)) 2238 return -EADDRINUSE; 2239 } 2240 return 0; 2241 } 2242 2243 static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv) 2244 { 2245 struct rdma_bind_list *bind_list; 2246 unsigned short snum; 2247 int ret; 2248 2249 snum = ntohs(cma_port((struct sockaddr *) &id_priv->id.route.addr.src_addr)); 2250 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE)) 2251 return -EACCES; 2252 2253 bind_list = idr_find(ps, snum); 2254 if (!bind_list) { 2255 ret = cma_alloc_port(ps, id_priv, snum); 2256 } else { 2257 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr); 2258 if (!ret) 2259 cma_bind_port(bind_list, id_priv); 2260 } 2261 return ret; 2262 } 2263 2264 static int cma_bind_listen(struct rdma_id_private *id_priv) 2265 { 2266 struct rdma_bind_list *bind_list = id_priv->bind_list; 2267 int ret = 0; 2268 2269 mutex_lock(&lock); 2270 if (bind_list->owners.first->next) 2271 ret = cma_check_port(bind_list, id_priv, 0); 2272 mutex_unlock(&lock); 2273 return ret; 2274 } 2275 2276 static int cma_get_port(struct rdma_id_private *id_priv) 2277 { 2278 struct idr *ps; 2279 int ret; 2280 2281 switch (id_priv->id.ps) { 2282 case RDMA_PS_SDP: 2283 ps = &sdp_ps; 2284 break; 2285 case RDMA_PS_TCP: 2286 ps = &tcp_ps; 2287 break; 2288 case RDMA_PS_UDP: 2289 ps = &udp_ps; 2290 break; 2291 case RDMA_PS_IPOIB: 2292 ps = &ipoib_ps; 2293 break; 2294 case RDMA_PS_IB: 2295 ps = &ib_ps; 2296 break; 2297 default: 2298 return -EPROTONOSUPPORT; 2299 } 2300 2301 mutex_lock(&lock); 2302 if (cma_any_port((struct sockaddr *) &id_priv->id.route.addr.src_addr)) 2303 ret = cma_alloc_any_port(ps, id_priv); 2304 else 2305 ret = cma_use_port(ps, id_priv); 2306 mutex_unlock(&lock); 2307 2308 return ret; 2309 } 2310 2311 static int cma_check_linklocal(struct rdma_dev_addr *dev_addr, 2312 struct sockaddr *addr) 2313 { 2314 #if IS_ENABLED(CONFIG_IPV6) 2315 struct sockaddr_in6 *sin6; 2316 2317 if (addr->sa_family != AF_INET6) 2318 return 0; 2319 2320 sin6 = (struct sockaddr_in6 *) addr; 2321 if ((ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) && 2322 !sin6->sin6_scope_id) 2323 return -EINVAL; 2324 2325 dev_addr->bound_dev_if = sin6->sin6_scope_id; 2326 #endif 2327 return 0; 2328 } 2329 2330 int rdma_listen(struct rdma_cm_id *id, int backlog) 2331 { 2332 struct rdma_id_private *id_priv; 2333 int ret; 2334 2335 id_priv = container_of(id, struct rdma_id_private, id); 2336 if (id_priv->state == RDMA_CM_IDLE) { 2337 ((struct sockaddr *) &id->route.addr.src_addr)->sa_family = AF_INET; 2338 ret = rdma_bind_addr(id, (struct sockaddr *) &id->route.addr.src_addr); 2339 if (ret) 2340 return ret; 2341 } 2342 2343 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN)) 2344 return -EINVAL; 2345 2346 if (id_priv->reuseaddr) { 2347 ret = cma_bind_listen(id_priv); 2348 if (ret) 2349 goto err; 2350 } 2351 2352 id_priv->backlog = backlog; 2353 if (id->device) { 2354 switch (rdma_node_get_transport(id->device->node_type)) { 2355 case RDMA_TRANSPORT_IB: 2356 ret = cma_ib_listen(id_priv); 2357 if (ret) 2358 goto err; 2359 break; 2360 case RDMA_TRANSPORT_IWARP: 2361 ret = cma_iw_listen(id_priv, backlog); 2362 if (ret) 2363 goto err; 2364 break; 2365 default: 2366 ret = -ENOSYS; 2367 goto err; 2368 } 2369 } else 2370 cma_listen_on_all(id_priv); 2371 2372 return 0; 2373 err: 2374 id_priv->backlog = 0; 2375 cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND); 2376 return ret; 2377 } 2378 EXPORT_SYMBOL(rdma_listen); 2379 2380 int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr) 2381 { 2382 struct rdma_id_private *id_priv; 2383 int ret; 2384 2385 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6) 2386 return -EAFNOSUPPORT; 2387 2388 id_priv = container_of(id, struct rdma_id_private, id); 2389 if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND)) 2390 return -EINVAL; 2391 2392 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr); 2393 if (ret) 2394 goto err1; 2395 2396 if (!cma_any_addr(addr)) { 2397 ret = rdma_translate_ip(addr, &id->route.addr.dev_addr); 2398 if (ret) 2399 goto err1; 2400 2401 ret = cma_acquire_dev(id_priv); 2402 if (ret) 2403 goto err1; 2404 } 2405 2406 memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr)); 2407 if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) { 2408 if (addr->sa_family == AF_INET) 2409 id_priv->afonly = 1; 2410 #if IS_ENABLED(CONFIG_IPV6) 2411 else if (addr->sa_family == AF_INET6) 2412 id_priv->afonly = init_net.ipv6.sysctl.bindv6only; 2413 #endif 2414 } 2415 ret = cma_get_port(id_priv); 2416 if (ret) 2417 goto err2; 2418 2419 return 0; 2420 err2: 2421 if (id_priv->cma_dev) 2422 cma_release_dev(id_priv); 2423 err1: 2424 cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE); 2425 return ret; 2426 } 2427 EXPORT_SYMBOL(rdma_bind_addr); 2428 2429 static int cma_format_hdr(void *hdr, enum rdma_port_space ps, 2430 struct rdma_route *route) 2431 { 2432 struct cma_hdr *cma_hdr; 2433 struct sdp_hh *sdp_hdr; 2434 2435 if (route->addr.src_addr.ss_family == AF_INET) { 2436 struct sockaddr_in *src4, *dst4; 2437 2438 src4 = (struct sockaddr_in *) &route->addr.src_addr; 2439 dst4 = (struct sockaddr_in *) &route->addr.dst_addr; 2440 2441 switch (ps) { 2442 case RDMA_PS_SDP: 2443 sdp_hdr = hdr; 2444 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION) 2445 return -EINVAL; 2446 sdp_set_ip_ver(sdp_hdr, 4); 2447 sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; 2448 sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; 2449 sdp_hdr->port = src4->sin_port; 2450 break; 2451 default: 2452 cma_hdr = hdr; 2453 cma_hdr->cma_version = CMA_VERSION; 2454 cma_set_ip_ver(cma_hdr, 4); 2455 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; 2456 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; 2457 cma_hdr->port = src4->sin_port; 2458 break; 2459 } 2460 } else { 2461 struct sockaddr_in6 *src6, *dst6; 2462 2463 src6 = (struct sockaddr_in6 *) &route->addr.src_addr; 2464 dst6 = (struct sockaddr_in6 *) &route->addr.dst_addr; 2465 2466 switch (ps) { 2467 case RDMA_PS_SDP: 2468 sdp_hdr = hdr; 2469 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION) 2470 return -EINVAL; 2471 sdp_set_ip_ver(sdp_hdr, 6); 2472 sdp_hdr->src_addr.ip6 = src6->sin6_addr; 2473 sdp_hdr->dst_addr.ip6 = dst6->sin6_addr; 2474 sdp_hdr->port = src6->sin6_port; 2475 break; 2476 default: 2477 cma_hdr = hdr; 2478 cma_hdr->cma_version = CMA_VERSION; 2479 cma_set_ip_ver(cma_hdr, 6); 2480 cma_hdr->src_addr.ip6 = src6->sin6_addr; 2481 cma_hdr->dst_addr.ip6 = dst6->sin6_addr; 2482 cma_hdr->port = src6->sin6_port; 2483 break; 2484 } 2485 } 2486 return 0; 2487 } 2488 2489 static int cma_sidr_rep_handler(struct ib_cm_id *cm_id, 2490 struct ib_cm_event *ib_event) 2491 { 2492 struct rdma_id_private *id_priv = cm_id->context; 2493 struct rdma_cm_event event; 2494 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd; 2495 int ret = 0; 2496 2497 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT)) 2498 return 0; 2499 2500 memset(&event, 0, sizeof event); 2501 switch (ib_event->event) { 2502 case IB_CM_SIDR_REQ_ERROR: 2503 event.event = RDMA_CM_EVENT_UNREACHABLE; 2504 event.status = -ETIMEDOUT; 2505 break; 2506 case IB_CM_SIDR_REP_RECEIVED: 2507 event.param.ud.private_data = ib_event->private_data; 2508 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE; 2509 if (rep->status != IB_SIDR_SUCCESS) { 2510 event.event = RDMA_CM_EVENT_UNREACHABLE; 2511 event.status = ib_event->param.sidr_rep_rcvd.status; 2512 break; 2513 } 2514 ret = cma_set_qkey(id_priv); 2515 if (ret) { 2516 event.event = RDMA_CM_EVENT_ADDR_ERROR; 2517 event.status = -EINVAL; 2518 break; 2519 } 2520 if (id_priv->qkey != rep->qkey) { 2521 event.event = RDMA_CM_EVENT_UNREACHABLE; 2522 event.status = -EINVAL; 2523 break; 2524 } 2525 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num, 2526 id_priv->id.route.path_rec, 2527 &event.param.ud.ah_attr); 2528 event.param.ud.qp_num = rep->qpn; 2529 event.param.ud.qkey = rep->qkey; 2530 event.event = RDMA_CM_EVENT_ESTABLISHED; 2531 event.status = 0; 2532 break; 2533 default: 2534 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n", 2535 ib_event->event); 2536 goto out; 2537 } 2538 2539 ret = id_priv->id.event_handler(&id_priv->id, &event); 2540 if (ret) { 2541 /* Destroy the CM ID by returning a non-zero value. */ 2542 id_priv->cm_id.ib = NULL; 2543 cma_exch(id_priv, RDMA_CM_DESTROYING); 2544 mutex_unlock(&id_priv->handler_mutex); 2545 rdma_destroy_id(&id_priv->id); 2546 return ret; 2547 } 2548 out: 2549 mutex_unlock(&id_priv->handler_mutex); 2550 return ret; 2551 } 2552 2553 static int cma_resolve_ib_udp(struct rdma_id_private *id_priv, 2554 struct rdma_conn_param *conn_param) 2555 { 2556 struct ib_cm_sidr_req_param req; 2557 struct rdma_route *route; 2558 struct ib_cm_id *id; 2559 int ret; 2560 2561 req.private_data_len = sizeof(struct cma_hdr) + 2562 conn_param->private_data_len; 2563 if (req.private_data_len < conn_param->private_data_len) 2564 return -EINVAL; 2565 2566 req.private_data = kzalloc(req.private_data_len, GFP_ATOMIC); 2567 if (!req.private_data) 2568 return -ENOMEM; 2569 2570 if (conn_param->private_data && conn_param->private_data_len) 2571 memcpy((void *) req.private_data + sizeof(struct cma_hdr), 2572 conn_param->private_data, conn_param->private_data_len); 2573 2574 route = &id_priv->id.route; 2575 ret = cma_format_hdr((void *) req.private_data, id_priv->id.ps, route); 2576 if (ret) 2577 goto out; 2578 2579 id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler, 2580 id_priv); 2581 if (IS_ERR(id)) { 2582 ret = PTR_ERR(id); 2583 goto out; 2584 } 2585 id_priv->cm_id.ib = id; 2586 2587 req.path = route->path_rec; 2588 req.service_id = cma_get_service_id(id_priv->id.ps, 2589 (struct sockaddr *) &route->addr.dst_addr); 2590 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8); 2591 req.max_cm_retries = CMA_MAX_CM_RETRIES; 2592 2593 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req); 2594 if (ret) { 2595 ib_destroy_cm_id(id_priv->cm_id.ib); 2596 id_priv->cm_id.ib = NULL; 2597 } 2598 out: 2599 kfree(req.private_data); 2600 return ret; 2601 } 2602 2603 static int cma_connect_ib(struct rdma_id_private *id_priv, 2604 struct rdma_conn_param *conn_param) 2605 { 2606 struct ib_cm_req_param req; 2607 struct rdma_route *route; 2608 void *private_data; 2609 struct ib_cm_id *id; 2610 int offset, ret; 2611 2612 memset(&req, 0, sizeof req); 2613 offset = cma_user_data_offset(id_priv->id.ps); 2614 req.private_data_len = offset + conn_param->private_data_len; 2615 if (req.private_data_len < conn_param->private_data_len) 2616 return -EINVAL; 2617 2618 private_data = kzalloc(req.private_data_len, GFP_ATOMIC); 2619 if (!private_data) 2620 return -ENOMEM; 2621 2622 if (conn_param->private_data && conn_param->private_data_len) 2623 memcpy(private_data + offset, conn_param->private_data, 2624 conn_param->private_data_len); 2625 2626 id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv); 2627 if (IS_ERR(id)) { 2628 ret = PTR_ERR(id); 2629 goto out; 2630 } 2631 id_priv->cm_id.ib = id; 2632 2633 route = &id_priv->id.route; 2634 ret = cma_format_hdr(private_data, id_priv->id.ps, route); 2635 if (ret) 2636 goto out; 2637 req.private_data = private_data; 2638 2639 req.primary_path = &route->path_rec[0]; 2640 if (route->num_paths == 2) 2641 req.alternate_path = &route->path_rec[1]; 2642 2643 req.service_id = cma_get_service_id(id_priv->id.ps, 2644 (struct sockaddr *) &route->addr.dst_addr); 2645 req.qp_num = id_priv->qp_num; 2646 req.qp_type = id_priv->id.qp_type; 2647 req.starting_psn = id_priv->seq_num; 2648 req.responder_resources = conn_param->responder_resources; 2649 req.initiator_depth = conn_param->initiator_depth; 2650 req.flow_control = conn_param->flow_control; 2651 req.retry_count = min_t(u8, 7, conn_param->retry_count); 2652 req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count); 2653 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; 2654 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; 2655 req.max_cm_retries = CMA_MAX_CM_RETRIES; 2656 req.srq = id_priv->srq ? 1 : 0; 2657 2658 ret = ib_send_cm_req(id_priv->cm_id.ib, &req); 2659 out: 2660 if (ret && !IS_ERR(id)) { 2661 ib_destroy_cm_id(id); 2662 id_priv->cm_id.ib = NULL; 2663 } 2664 2665 kfree(private_data); 2666 return ret; 2667 } 2668 2669 static int cma_connect_iw(struct rdma_id_private *id_priv, 2670 struct rdma_conn_param *conn_param) 2671 { 2672 struct iw_cm_id *cm_id; 2673 struct sockaddr_in* sin; 2674 int ret; 2675 struct iw_cm_conn_param iw_param; 2676 2677 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv); 2678 if (IS_ERR(cm_id)) 2679 return PTR_ERR(cm_id); 2680 2681 id_priv->cm_id.iw = cm_id; 2682 2683 sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr; 2684 cm_id->local_addr = *sin; 2685 2686 sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr; 2687 cm_id->remote_addr = *sin; 2688 2689 ret = cma_modify_qp_rtr(id_priv, conn_param); 2690 if (ret) 2691 goto out; 2692 2693 if (conn_param) { 2694 iw_param.ord = conn_param->initiator_depth; 2695 iw_param.ird = conn_param->responder_resources; 2696 iw_param.private_data = conn_param->private_data; 2697 iw_param.private_data_len = conn_param->private_data_len; 2698 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num; 2699 } else { 2700 memset(&iw_param, 0, sizeof iw_param); 2701 iw_param.qpn = id_priv->qp_num; 2702 } 2703 ret = iw_cm_connect(cm_id, &iw_param); 2704 out: 2705 if (ret) { 2706 iw_destroy_cm_id(cm_id); 2707 id_priv->cm_id.iw = NULL; 2708 } 2709 return ret; 2710 } 2711 2712 int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) 2713 { 2714 struct rdma_id_private *id_priv; 2715 int ret; 2716 2717 id_priv = container_of(id, struct rdma_id_private, id); 2718 if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT)) 2719 return -EINVAL; 2720 2721 if (!id->qp) { 2722 id_priv->qp_num = conn_param->qp_num; 2723 id_priv->srq = conn_param->srq; 2724 } 2725 2726 switch (rdma_node_get_transport(id->device->node_type)) { 2727 case RDMA_TRANSPORT_IB: 2728 if (id->qp_type == IB_QPT_UD) 2729 ret = cma_resolve_ib_udp(id_priv, conn_param); 2730 else 2731 ret = cma_connect_ib(id_priv, conn_param); 2732 break; 2733 case RDMA_TRANSPORT_IWARP: 2734 ret = cma_connect_iw(id_priv, conn_param); 2735 break; 2736 default: 2737 ret = -ENOSYS; 2738 break; 2739 } 2740 if (ret) 2741 goto err; 2742 2743 return 0; 2744 err: 2745 cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED); 2746 return ret; 2747 } 2748 EXPORT_SYMBOL(rdma_connect); 2749 2750 static int cma_accept_ib(struct rdma_id_private *id_priv, 2751 struct rdma_conn_param *conn_param) 2752 { 2753 struct ib_cm_rep_param rep; 2754 int ret; 2755 2756 ret = cma_modify_qp_rtr(id_priv, conn_param); 2757 if (ret) 2758 goto out; 2759 2760 ret = cma_modify_qp_rts(id_priv, conn_param); 2761 if (ret) 2762 goto out; 2763 2764 memset(&rep, 0, sizeof rep); 2765 rep.qp_num = id_priv->qp_num; 2766 rep.starting_psn = id_priv->seq_num; 2767 rep.private_data = conn_param->private_data; 2768 rep.private_data_len = conn_param->private_data_len; 2769 rep.responder_resources = conn_param->responder_resources; 2770 rep.initiator_depth = conn_param->initiator_depth; 2771 rep.failover_accepted = 0; 2772 rep.flow_control = conn_param->flow_control; 2773 rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count); 2774 rep.srq = id_priv->srq ? 1 : 0; 2775 2776 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep); 2777 out: 2778 return ret; 2779 } 2780 2781 static int cma_accept_iw(struct rdma_id_private *id_priv, 2782 struct rdma_conn_param *conn_param) 2783 { 2784 struct iw_cm_conn_param iw_param; 2785 int ret; 2786 2787 ret = cma_modify_qp_rtr(id_priv, conn_param); 2788 if (ret) 2789 return ret; 2790 2791 iw_param.ord = conn_param->initiator_depth; 2792 iw_param.ird = conn_param->responder_resources; 2793 iw_param.private_data = conn_param->private_data; 2794 iw_param.private_data_len = conn_param->private_data_len; 2795 if (id_priv->id.qp) { 2796 iw_param.qpn = id_priv->qp_num; 2797 } else 2798 iw_param.qpn = conn_param->qp_num; 2799 2800 return iw_cm_accept(id_priv->cm_id.iw, &iw_param); 2801 } 2802 2803 static int cma_send_sidr_rep(struct rdma_id_private *id_priv, 2804 enum ib_cm_sidr_status status, 2805 const void *private_data, int private_data_len) 2806 { 2807 struct ib_cm_sidr_rep_param rep; 2808 int ret; 2809 2810 memset(&rep, 0, sizeof rep); 2811 rep.status = status; 2812 if (status == IB_SIDR_SUCCESS) { 2813 ret = cma_set_qkey(id_priv); 2814 if (ret) 2815 return ret; 2816 rep.qp_num = id_priv->qp_num; 2817 rep.qkey = id_priv->qkey; 2818 } 2819 rep.private_data = private_data; 2820 rep.private_data_len = private_data_len; 2821 2822 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep); 2823 } 2824 2825 int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) 2826 { 2827 struct rdma_id_private *id_priv; 2828 int ret; 2829 2830 id_priv = container_of(id, struct rdma_id_private, id); 2831 2832 id_priv->owner = task_pid_nr(current); 2833 2834 if (!cma_comp(id_priv, RDMA_CM_CONNECT)) 2835 return -EINVAL; 2836 2837 if (!id->qp && conn_param) { 2838 id_priv->qp_num = conn_param->qp_num; 2839 id_priv->srq = conn_param->srq; 2840 } 2841 2842 switch (rdma_node_get_transport(id->device->node_type)) { 2843 case RDMA_TRANSPORT_IB: 2844 if (id->qp_type == IB_QPT_UD) { 2845 if (conn_param) 2846 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS, 2847 conn_param->private_data, 2848 conn_param->private_data_len); 2849 else 2850 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS, 2851 NULL, 0); 2852 } else { 2853 if (conn_param) 2854 ret = cma_accept_ib(id_priv, conn_param); 2855 else 2856 ret = cma_rep_recv(id_priv); 2857 } 2858 break; 2859 case RDMA_TRANSPORT_IWARP: 2860 ret = cma_accept_iw(id_priv, conn_param); 2861 break; 2862 default: 2863 ret = -ENOSYS; 2864 break; 2865 } 2866 2867 if (ret) 2868 goto reject; 2869 2870 return 0; 2871 reject: 2872 cma_modify_qp_err(id_priv); 2873 rdma_reject(id, NULL, 0); 2874 return ret; 2875 } 2876 EXPORT_SYMBOL(rdma_accept); 2877 2878 int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event) 2879 { 2880 struct rdma_id_private *id_priv; 2881 int ret; 2882 2883 id_priv = container_of(id, struct rdma_id_private, id); 2884 if (!id_priv->cm_id.ib) 2885 return -EINVAL; 2886 2887 switch (id->device->node_type) { 2888 case RDMA_NODE_IB_CA: 2889 ret = ib_cm_notify(id_priv->cm_id.ib, event); 2890 break; 2891 default: 2892 ret = 0; 2893 break; 2894 } 2895 return ret; 2896 } 2897 EXPORT_SYMBOL(rdma_notify); 2898 2899 int rdma_reject(struct rdma_cm_id *id, const void *private_data, 2900 u8 private_data_len) 2901 { 2902 struct rdma_id_private *id_priv; 2903 int ret; 2904 2905 id_priv = container_of(id, struct rdma_id_private, id); 2906 if (!id_priv->cm_id.ib) 2907 return -EINVAL; 2908 2909 switch (rdma_node_get_transport(id->device->node_type)) { 2910 case RDMA_TRANSPORT_IB: 2911 if (id->qp_type == IB_QPT_UD) 2912 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 2913 private_data, private_data_len); 2914 else 2915 ret = ib_send_cm_rej(id_priv->cm_id.ib, 2916 IB_CM_REJ_CONSUMER_DEFINED, NULL, 2917 0, private_data, private_data_len); 2918 break; 2919 case RDMA_TRANSPORT_IWARP: 2920 ret = iw_cm_reject(id_priv->cm_id.iw, 2921 private_data, private_data_len); 2922 break; 2923 default: 2924 ret = -ENOSYS; 2925 break; 2926 } 2927 return ret; 2928 } 2929 EXPORT_SYMBOL(rdma_reject); 2930 2931 int rdma_disconnect(struct rdma_cm_id *id) 2932 { 2933 struct rdma_id_private *id_priv; 2934 int ret; 2935 2936 id_priv = container_of(id, struct rdma_id_private, id); 2937 if (!id_priv->cm_id.ib) 2938 return -EINVAL; 2939 2940 switch (rdma_node_get_transport(id->device->node_type)) { 2941 case RDMA_TRANSPORT_IB: 2942 ret = cma_modify_qp_err(id_priv); 2943 if (ret) 2944 goto out; 2945 /* Initiate or respond to a disconnect. */ 2946 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0)) 2947 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0); 2948 break; 2949 case RDMA_TRANSPORT_IWARP: 2950 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0); 2951 break; 2952 default: 2953 ret = -EINVAL; 2954 break; 2955 } 2956 out: 2957 return ret; 2958 } 2959 EXPORT_SYMBOL(rdma_disconnect); 2960 2961 static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast) 2962 { 2963 struct rdma_id_private *id_priv; 2964 struct cma_multicast *mc = multicast->context; 2965 struct rdma_cm_event event; 2966 int ret; 2967 2968 id_priv = mc->id_priv; 2969 if (cma_disable_callback(id_priv, RDMA_CM_ADDR_BOUND) && 2970 cma_disable_callback(id_priv, RDMA_CM_ADDR_RESOLVED)) 2971 return 0; 2972 2973 mutex_lock(&id_priv->qp_mutex); 2974 if (!status && id_priv->id.qp) 2975 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid, 2976 be16_to_cpu(multicast->rec.mlid)); 2977 mutex_unlock(&id_priv->qp_mutex); 2978 2979 memset(&event, 0, sizeof event); 2980 event.status = status; 2981 event.param.ud.private_data = mc->context; 2982 if (!status) { 2983 event.event = RDMA_CM_EVENT_MULTICAST_JOIN; 2984 ib_init_ah_from_mcmember(id_priv->id.device, 2985 id_priv->id.port_num, &multicast->rec, 2986 &event.param.ud.ah_attr); 2987 event.param.ud.qp_num = 0xFFFFFF; 2988 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey); 2989 } else 2990 event.event = RDMA_CM_EVENT_MULTICAST_ERROR; 2991 2992 ret = id_priv->id.event_handler(&id_priv->id, &event); 2993 if (ret) { 2994 cma_exch(id_priv, RDMA_CM_DESTROYING); 2995 mutex_unlock(&id_priv->handler_mutex); 2996 rdma_destroy_id(&id_priv->id); 2997 return 0; 2998 } 2999 3000 mutex_unlock(&id_priv->handler_mutex); 3001 return 0; 3002 } 3003 3004 static void cma_set_mgid(struct rdma_id_private *id_priv, 3005 struct sockaddr *addr, union ib_gid *mgid) 3006 { 3007 unsigned char mc_map[MAX_ADDR_LEN]; 3008 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 3009 struct sockaddr_in *sin = (struct sockaddr_in *) addr; 3010 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr; 3011 3012 if (cma_any_addr(addr)) { 3013 memset(mgid, 0, sizeof *mgid); 3014 } else if ((addr->sa_family == AF_INET6) && 3015 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) == 3016 0xFF10A01B)) { 3017 /* IPv6 address is an SA assigned MGID. */ 3018 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid); 3019 } else if ((addr->sa_family == AF_INET6)) { 3020 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map); 3021 if (id_priv->id.ps == RDMA_PS_UDP) 3022 mc_map[7] = 0x01; /* Use RDMA CM signature */ 3023 *mgid = *(union ib_gid *) (mc_map + 4); 3024 } else { 3025 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map); 3026 if (id_priv->id.ps == RDMA_PS_UDP) 3027 mc_map[7] = 0x01; /* Use RDMA CM signature */ 3028 *mgid = *(union ib_gid *) (mc_map + 4); 3029 } 3030 } 3031 3032 static int cma_join_ib_multicast(struct rdma_id_private *id_priv, 3033 struct cma_multicast *mc) 3034 { 3035 struct ib_sa_mcmember_rec rec; 3036 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 3037 ib_sa_comp_mask comp_mask; 3038 int ret; 3039 3040 ib_addr_get_mgid(dev_addr, &rec.mgid); 3041 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num, 3042 &rec.mgid, &rec); 3043 if (ret) 3044 return ret; 3045 3046 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid); 3047 if (id_priv->id.ps == RDMA_PS_UDP) 3048 rec.qkey = cpu_to_be32(RDMA_UDP_QKEY); 3049 rdma_addr_get_sgid(dev_addr, &rec.port_gid); 3050 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); 3051 rec.join_state = 1; 3052 3053 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID | 3054 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE | 3055 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL | 3056 IB_SA_MCMEMBER_REC_FLOW_LABEL | 3057 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS; 3058 3059 if (id_priv->id.ps == RDMA_PS_IPOIB) 3060 comp_mask |= IB_SA_MCMEMBER_REC_RATE | 3061 IB_SA_MCMEMBER_REC_RATE_SELECTOR | 3062 IB_SA_MCMEMBER_REC_MTU_SELECTOR | 3063 IB_SA_MCMEMBER_REC_MTU | 3064 IB_SA_MCMEMBER_REC_HOP_LIMIT; 3065 3066 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device, 3067 id_priv->id.port_num, &rec, 3068 comp_mask, GFP_KERNEL, 3069 cma_ib_mc_handler, mc); 3070 return PTR_RET(mc->multicast.ib); 3071 } 3072 3073 static void iboe_mcast_work_handler(struct work_struct *work) 3074 { 3075 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work); 3076 struct cma_multicast *mc = mw->mc; 3077 struct ib_sa_multicast *m = mc->multicast.ib; 3078 3079 mc->multicast.ib->context = mc; 3080 cma_ib_mc_handler(0, m); 3081 kref_put(&mc->mcref, release_mc); 3082 kfree(mw); 3083 } 3084 3085 static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid) 3086 { 3087 struct sockaddr_in *sin = (struct sockaddr_in *)addr; 3088 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr; 3089 3090 if (cma_any_addr(addr)) { 3091 memset(mgid, 0, sizeof *mgid); 3092 } else if (addr->sa_family == AF_INET6) { 3093 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid); 3094 } else { 3095 mgid->raw[0] = 0xff; 3096 mgid->raw[1] = 0x0e; 3097 mgid->raw[2] = 0; 3098 mgid->raw[3] = 0; 3099 mgid->raw[4] = 0; 3100 mgid->raw[5] = 0; 3101 mgid->raw[6] = 0; 3102 mgid->raw[7] = 0; 3103 mgid->raw[8] = 0; 3104 mgid->raw[9] = 0; 3105 mgid->raw[10] = 0xff; 3106 mgid->raw[11] = 0xff; 3107 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr; 3108 } 3109 } 3110 3111 static int cma_iboe_join_multicast(struct rdma_id_private *id_priv, 3112 struct cma_multicast *mc) 3113 { 3114 struct iboe_mcast_work *work; 3115 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 3116 int err; 3117 struct sockaddr *addr = (struct sockaddr *)&mc->addr; 3118 struct net_device *ndev = NULL; 3119 3120 if (cma_zero_addr((struct sockaddr *)&mc->addr)) 3121 return -EINVAL; 3122 3123 work = kzalloc(sizeof *work, GFP_KERNEL); 3124 if (!work) 3125 return -ENOMEM; 3126 3127 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL); 3128 if (!mc->multicast.ib) { 3129 err = -ENOMEM; 3130 goto out1; 3131 } 3132 3133 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid); 3134 3135 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff); 3136 if (id_priv->id.ps == RDMA_PS_UDP) 3137 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY); 3138 3139 if (dev_addr->bound_dev_if) 3140 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if); 3141 if (!ndev) { 3142 err = -ENODEV; 3143 goto out2; 3144 } 3145 mc->multicast.ib->rec.rate = iboe_get_rate(ndev); 3146 mc->multicast.ib->rec.hop_limit = 1; 3147 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu); 3148 dev_put(ndev); 3149 if (!mc->multicast.ib->rec.mtu) { 3150 err = -EINVAL; 3151 goto out2; 3152 } 3153 iboe_addr_get_sgid(dev_addr, &mc->multicast.ib->rec.port_gid); 3154 work->id = id_priv; 3155 work->mc = mc; 3156 INIT_WORK(&work->work, iboe_mcast_work_handler); 3157 kref_get(&mc->mcref); 3158 queue_work(cma_wq, &work->work); 3159 3160 return 0; 3161 3162 out2: 3163 kfree(mc->multicast.ib); 3164 out1: 3165 kfree(work); 3166 return err; 3167 } 3168 3169 int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr, 3170 void *context) 3171 { 3172 struct rdma_id_private *id_priv; 3173 struct cma_multicast *mc; 3174 int ret; 3175 3176 id_priv = container_of(id, struct rdma_id_private, id); 3177 if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) && 3178 !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED)) 3179 return -EINVAL; 3180 3181 mc = kmalloc(sizeof *mc, GFP_KERNEL); 3182 if (!mc) 3183 return -ENOMEM; 3184 3185 memcpy(&mc->addr, addr, ip_addr_size(addr)); 3186 mc->context = context; 3187 mc->id_priv = id_priv; 3188 3189 spin_lock(&id_priv->lock); 3190 list_add(&mc->list, &id_priv->mc_list); 3191 spin_unlock(&id_priv->lock); 3192 3193 switch (rdma_node_get_transport(id->device->node_type)) { 3194 case RDMA_TRANSPORT_IB: 3195 switch (rdma_port_get_link_layer(id->device, id->port_num)) { 3196 case IB_LINK_LAYER_INFINIBAND: 3197 ret = cma_join_ib_multicast(id_priv, mc); 3198 break; 3199 case IB_LINK_LAYER_ETHERNET: 3200 kref_init(&mc->mcref); 3201 ret = cma_iboe_join_multicast(id_priv, mc); 3202 break; 3203 default: 3204 ret = -EINVAL; 3205 } 3206 break; 3207 default: 3208 ret = -ENOSYS; 3209 break; 3210 } 3211 3212 if (ret) { 3213 spin_lock_irq(&id_priv->lock); 3214 list_del(&mc->list); 3215 spin_unlock_irq(&id_priv->lock); 3216 kfree(mc); 3217 } 3218 return ret; 3219 } 3220 EXPORT_SYMBOL(rdma_join_multicast); 3221 3222 void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr) 3223 { 3224 struct rdma_id_private *id_priv; 3225 struct cma_multicast *mc; 3226 3227 id_priv = container_of(id, struct rdma_id_private, id); 3228 spin_lock_irq(&id_priv->lock); 3229 list_for_each_entry(mc, &id_priv->mc_list, list) { 3230 if (!memcmp(&mc->addr, addr, ip_addr_size(addr))) { 3231 list_del(&mc->list); 3232 spin_unlock_irq(&id_priv->lock); 3233 3234 if (id->qp) 3235 ib_detach_mcast(id->qp, 3236 &mc->multicast.ib->rec.mgid, 3237 be16_to_cpu(mc->multicast.ib->rec.mlid)); 3238 if (rdma_node_get_transport(id_priv->cma_dev->device->node_type) == RDMA_TRANSPORT_IB) { 3239 switch (rdma_port_get_link_layer(id->device, id->port_num)) { 3240 case IB_LINK_LAYER_INFINIBAND: 3241 ib_sa_free_multicast(mc->multicast.ib); 3242 kfree(mc); 3243 break; 3244 case IB_LINK_LAYER_ETHERNET: 3245 kref_put(&mc->mcref, release_mc); 3246 break; 3247 default: 3248 break; 3249 } 3250 } 3251 return; 3252 } 3253 } 3254 spin_unlock_irq(&id_priv->lock); 3255 } 3256 EXPORT_SYMBOL(rdma_leave_multicast); 3257 3258 static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv) 3259 { 3260 struct rdma_dev_addr *dev_addr; 3261 struct cma_ndev_work *work; 3262 3263 dev_addr = &id_priv->id.route.addr.dev_addr; 3264 3265 if ((dev_addr->bound_dev_if == ndev->ifindex) && 3266 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) { 3267 printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n", 3268 ndev->name, &id_priv->id); 3269 work = kzalloc(sizeof *work, GFP_KERNEL); 3270 if (!work) 3271 return -ENOMEM; 3272 3273 INIT_WORK(&work->work, cma_ndev_work_handler); 3274 work->id = id_priv; 3275 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE; 3276 atomic_inc(&id_priv->refcount); 3277 queue_work(cma_wq, &work->work); 3278 } 3279 3280 return 0; 3281 } 3282 3283 static int cma_netdev_callback(struct notifier_block *self, unsigned long event, 3284 void *ctx) 3285 { 3286 struct net_device *ndev = (struct net_device *)ctx; 3287 struct cma_device *cma_dev; 3288 struct rdma_id_private *id_priv; 3289 int ret = NOTIFY_DONE; 3290 3291 if (dev_net(ndev) != &init_net) 3292 return NOTIFY_DONE; 3293 3294 if (event != NETDEV_BONDING_FAILOVER) 3295 return NOTIFY_DONE; 3296 3297 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING)) 3298 return NOTIFY_DONE; 3299 3300 mutex_lock(&lock); 3301 list_for_each_entry(cma_dev, &dev_list, list) 3302 list_for_each_entry(id_priv, &cma_dev->id_list, list) { 3303 ret = cma_netdev_change(ndev, id_priv); 3304 if (ret) 3305 goto out; 3306 } 3307 3308 out: 3309 mutex_unlock(&lock); 3310 return ret; 3311 } 3312 3313 static struct notifier_block cma_nb = { 3314 .notifier_call = cma_netdev_callback 3315 }; 3316 3317 static void cma_add_one(struct ib_device *device) 3318 { 3319 struct cma_device *cma_dev; 3320 struct rdma_id_private *id_priv; 3321 3322 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL); 3323 if (!cma_dev) 3324 return; 3325 3326 cma_dev->device = device; 3327 3328 init_completion(&cma_dev->comp); 3329 atomic_set(&cma_dev->refcount, 1); 3330 INIT_LIST_HEAD(&cma_dev->id_list); 3331 ib_set_client_data(device, &cma_client, cma_dev); 3332 3333 mutex_lock(&lock); 3334 list_add_tail(&cma_dev->list, &dev_list); 3335 list_for_each_entry(id_priv, &listen_any_list, list) 3336 cma_listen_on_dev(id_priv, cma_dev); 3337 mutex_unlock(&lock); 3338 } 3339 3340 static int cma_remove_id_dev(struct rdma_id_private *id_priv) 3341 { 3342 struct rdma_cm_event event; 3343 enum rdma_cm_state state; 3344 int ret = 0; 3345 3346 /* Record that we want to remove the device */ 3347 state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL); 3348 if (state == RDMA_CM_DESTROYING) 3349 return 0; 3350 3351 cma_cancel_operation(id_priv, state); 3352 mutex_lock(&id_priv->handler_mutex); 3353 3354 /* Check for destruction from another callback. */ 3355 if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL)) 3356 goto out; 3357 3358 memset(&event, 0, sizeof event); 3359 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL; 3360 ret = id_priv->id.event_handler(&id_priv->id, &event); 3361 out: 3362 mutex_unlock(&id_priv->handler_mutex); 3363 return ret; 3364 } 3365 3366 static void cma_process_remove(struct cma_device *cma_dev) 3367 { 3368 struct rdma_id_private *id_priv; 3369 int ret; 3370 3371 mutex_lock(&lock); 3372 while (!list_empty(&cma_dev->id_list)) { 3373 id_priv = list_entry(cma_dev->id_list.next, 3374 struct rdma_id_private, list); 3375 3376 list_del(&id_priv->listen_list); 3377 list_del_init(&id_priv->list); 3378 atomic_inc(&id_priv->refcount); 3379 mutex_unlock(&lock); 3380 3381 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv); 3382 cma_deref_id(id_priv); 3383 if (ret) 3384 rdma_destroy_id(&id_priv->id); 3385 3386 mutex_lock(&lock); 3387 } 3388 mutex_unlock(&lock); 3389 3390 cma_deref_dev(cma_dev); 3391 wait_for_completion(&cma_dev->comp); 3392 } 3393 3394 static void cma_remove_one(struct ib_device *device) 3395 { 3396 struct cma_device *cma_dev; 3397 3398 cma_dev = ib_get_client_data(device, &cma_client); 3399 if (!cma_dev) 3400 return; 3401 3402 mutex_lock(&lock); 3403 list_del(&cma_dev->list); 3404 mutex_unlock(&lock); 3405 3406 cma_process_remove(cma_dev); 3407 kfree(cma_dev); 3408 } 3409 3410 static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb) 3411 { 3412 struct nlmsghdr *nlh; 3413 struct rdma_cm_id_stats *id_stats; 3414 struct rdma_id_private *id_priv; 3415 struct rdma_cm_id *id = NULL; 3416 struct cma_device *cma_dev; 3417 int i_dev = 0, i_id = 0; 3418 3419 /* 3420 * We export all of the IDs as a sequence of messages. Each 3421 * ID gets its own netlink message. 3422 */ 3423 mutex_lock(&lock); 3424 3425 list_for_each_entry(cma_dev, &dev_list, list) { 3426 if (i_dev < cb->args[0]) { 3427 i_dev++; 3428 continue; 3429 } 3430 3431 i_id = 0; 3432 list_for_each_entry(id_priv, &cma_dev->id_list, list) { 3433 if (i_id < cb->args[1]) { 3434 i_id++; 3435 continue; 3436 } 3437 3438 id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq, 3439 sizeof *id_stats, RDMA_NL_RDMA_CM, 3440 RDMA_NL_RDMA_CM_ID_STATS); 3441 if (!id_stats) 3442 goto out; 3443 3444 memset(id_stats, 0, sizeof *id_stats); 3445 id = &id_priv->id; 3446 id_stats->node_type = id->route.addr.dev_addr.dev_type; 3447 id_stats->port_num = id->port_num; 3448 id_stats->bound_dev_if = 3449 id->route.addr.dev_addr.bound_dev_if; 3450 3451 if (id->route.addr.src_addr.ss_family == AF_INET) { 3452 if (ibnl_put_attr(skb, nlh, 3453 sizeof(struct sockaddr_in), 3454 &id->route.addr.src_addr, 3455 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR)) { 3456 goto out; 3457 } 3458 if (ibnl_put_attr(skb, nlh, 3459 sizeof(struct sockaddr_in), 3460 &id->route.addr.dst_addr, 3461 RDMA_NL_RDMA_CM_ATTR_DST_ADDR)) { 3462 goto out; 3463 } 3464 } else if (id->route.addr.src_addr.ss_family == AF_INET6) { 3465 if (ibnl_put_attr(skb, nlh, 3466 sizeof(struct sockaddr_in6), 3467 &id->route.addr.src_addr, 3468 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR)) { 3469 goto out; 3470 } 3471 if (ibnl_put_attr(skb, nlh, 3472 sizeof(struct sockaddr_in6), 3473 &id->route.addr.dst_addr, 3474 RDMA_NL_RDMA_CM_ATTR_DST_ADDR)) { 3475 goto out; 3476 } 3477 } 3478 3479 id_stats->pid = id_priv->owner; 3480 id_stats->port_space = id->ps; 3481 id_stats->cm_state = id_priv->state; 3482 id_stats->qp_num = id_priv->qp_num; 3483 id_stats->qp_type = id->qp_type; 3484 3485 i_id++; 3486 } 3487 3488 cb->args[1] = 0; 3489 i_dev++; 3490 } 3491 3492 out: 3493 mutex_unlock(&lock); 3494 cb->args[0] = i_dev; 3495 cb->args[1] = i_id; 3496 3497 return skb->len; 3498 } 3499 3500 static const struct ibnl_client_cbs cma_cb_table[] = { 3501 [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats, 3502 .module = THIS_MODULE }, 3503 }; 3504 3505 static int __init cma_init(void) 3506 { 3507 int ret; 3508 3509 cma_wq = create_singlethread_workqueue("rdma_cm"); 3510 if (!cma_wq) 3511 return -ENOMEM; 3512 3513 ib_sa_register_client(&sa_client); 3514 rdma_addr_register_client(&addr_client); 3515 register_netdevice_notifier(&cma_nb); 3516 3517 ret = ib_register_client(&cma_client); 3518 if (ret) 3519 goto err; 3520 3521 if (ibnl_add_client(RDMA_NL_RDMA_CM, RDMA_NL_RDMA_CM_NUM_OPS, cma_cb_table)) 3522 printk(KERN_WARNING "RDMA CMA: failed to add netlink callback\n"); 3523 3524 return 0; 3525 3526 err: 3527 unregister_netdevice_notifier(&cma_nb); 3528 rdma_addr_unregister_client(&addr_client); 3529 ib_sa_unregister_client(&sa_client); 3530 destroy_workqueue(cma_wq); 3531 return ret; 3532 } 3533 3534 static void __exit cma_cleanup(void) 3535 { 3536 ibnl_remove_client(RDMA_NL_RDMA_CM); 3537 ib_unregister_client(&cma_client); 3538 unregister_netdevice_notifier(&cma_nb); 3539 rdma_addr_unregister_client(&addr_client); 3540 ib_sa_unregister_client(&sa_client); 3541 destroy_workqueue(cma_wq); 3542 idr_destroy(&sdp_ps); 3543 idr_destroy(&tcp_ps); 3544 idr_destroy(&udp_ps); 3545 idr_destroy(&ipoib_ps); 3546 idr_destroy(&ib_ps); 3547 } 3548 3549 module_init(cma_init); 3550 module_exit(cma_cleanup); 3551