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.h> 54 #include <rdma/ib_cache.h> 55 #include <rdma/ib_cm.h> 56 #include <rdma/ib_sa.h> 57 #include <rdma/iw_cm.h> 58 59 MODULE_AUTHOR("Sean Hefty"); 60 MODULE_DESCRIPTION("Generic RDMA CM Agent"); 61 MODULE_LICENSE("Dual BSD/GPL"); 62 63 #define CMA_CM_RESPONSE_TIMEOUT 20 64 #define CMA_MAX_CM_RETRIES 15 65 #define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24) 66 #define CMA_IBOE_PACKET_LIFETIME 18 67 68 static void cma_add_one(struct ib_device *device); 69 static void cma_remove_one(struct ib_device *device); 70 71 static struct ib_client cma_client = { 72 .name = "cma", 73 .add = cma_add_one, 74 .remove = cma_remove_one 75 }; 76 77 static struct ib_sa_client sa_client; 78 static struct rdma_addr_client addr_client; 79 static LIST_HEAD(dev_list); 80 static LIST_HEAD(listen_any_list); 81 static DEFINE_MUTEX(lock); 82 static struct workqueue_struct *cma_wq; 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 #define CMA_VERSION 0x00 199 200 static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp) 201 { 202 unsigned long flags; 203 int ret; 204 205 spin_lock_irqsave(&id_priv->lock, flags); 206 ret = (id_priv->state == comp); 207 spin_unlock_irqrestore(&id_priv->lock, flags); 208 return ret; 209 } 210 211 static int cma_comp_exch(struct rdma_id_private *id_priv, 212 enum rdma_cm_state comp, enum rdma_cm_state exch) 213 { 214 unsigned long flags; 215 int ret; 216 217 spin_lock_irqsave(&id_priv->lock, flags); 218 if ((ret = (id_priv->state == comp))) 219 id_priv->state = exch; 220 spin_unlock_irqrestore(&id_priv->lock, flags); 221 return ret; 222 } 223 224 static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv, 225 enum rdma_cm_state exch) 226 { 227 unsigned long flags; 228 enum rdma_cm_state old; 229 230 spin_lock_irqsave(&id_priv->lock, flags); 231 old = id_priv->state; 232 id_priv->state = exch; 233 spin_unlock_irqrestore(&id_priv->lock, flags); 234 return old; 235 } 236 237 static inline u8 cma_get_ip_ver(struct cma_hdr *hdr) 238 { 239 return hdr->ip_version >> 4; 240 } 241 242 static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver) 243 { 244 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF); 245 } 246 247 static void cma_attach_to_dev(struct rdma_id_private *id_priv, 248 struct cma_device *cma_dev) 249 { 250 atomic_inc(&cma_dev->refcount); 251 id_priv->cma_dev = cma_dev; 252 id_priv->id.device = cma_dev->device; 253 id_priv->id.route.addr.dev_addr.transport = 254 rdma_node_get_transport(cma_dev->device->node_type); 255 list_add_tail(&id_priv->list, &cma_dev->id_list); 256 } 257 258 static inline void cma_deref_dev(struct cma_device *cma_dev) 259 { 260 if (atomic_dec_and_test(&cma_dev->refcount)) 261 complete(&cma_dev->comp); 262 } 263 264 static inline void release_mc(struct kref *kref) 265 { 266 struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref); 267 268 kfree(mc->multicast.ib); 269 kfree(mc); 270 } 271 272 static void cma_release_dev(struct rdma_id_private *id_priv) 273 { 274 mutex_lock(&lock); 275 list_del(&id_priv->list); 276 cma_deref_dev(id_priv->cma_dev); 277 id_priv->cma_dev = NULL; 278 mutex_unlock(&lock); 279 } 280 281 static inline struct sockaddr *cma_src_addr(struct rdma_id_private *id_priv) 282 { 283 return (struct sockaddr *) &id_priv->id.route.addr.src_addr; 284 } 285 286 static inline struct sockaddr *cma_dst_addr(struct rdma_id_private *id_priv) 287 { 288 return (struct sockaddr *) &id_priv->id.route.addr.dst_addr; 289 } 290 291 static inline unsigned short cma_family(struct rdma_id_private *id_priv) 292 { 293 return id_priv->id.route.addr.src_addr.ss_family; 294 } 295 296 static int cma_set_qkey(struct rdma_id_private *id_priv, u32 qkey) 297 { 298 struct ib_sa_mcmember_rec rec; 299 int ret = 0; 300 301 if (id_priv->qkey) { 302 if (qkey && id_priv->qkey != qkey) 303 return -EINVAL; 304 return 0; 305 } 306 307 if (qkey) { 308 id_priv->qkey = qkey; 309 return 0; 310 } 311 312 switch (id_priv->id.ps) { 313 case RDMA_PS_UDP: 314 case RDMA_PS_IB: 315 id_priv->qkey = RDMA_UDP_QKEY; 316 break; 317 case RDMA_PS_IPOIB: 318 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid); 319 ret = ib_sa_get_mcmember_rec(id_priv->id.device, 320 id_priv->id.port_num, &rec.mgid, 321 &rec); 322 if (!ret) 323 id_priv->qkey = be32_to_cpu(rec.qkey); 324 break; 325 default: 326 break; 327 } 328 return ret; 329 } 330 331 static void cma_translate_ib(struct sockaddr_ib *sib, struct rdma_dev_addr *dev_addr) 332 { 333 dev_addr->dev_type = ARPHRD_INFINIBAND; 334 rdma_addr_set_sgid(dev_addr, (union ib_gid *) &sib->sib_addr); 335 ib_addr_set_pkey(dev_addr, ntohs(sib->sib_pkey)); 336 } 337 338 static int cma_translate_addr(struct sockaddr *addr, struct rdma_dev_addr *dev_addr) 339 { 340 int ret; 341 342 if (addr->sa_family != AF_IB) { 343 ret = rdma_translate_ip(addr, dev_addr, NULL); 344 } else { 345 cma_translate_ib((struct sockaddr_ib *) addr, dev_addr); 346 ret = 0; 347 } 348 349 return ret; 350 } 351 352 static int cma_acquire_dev(struct rdma_id_private *id_priv, 353 struct rdma_id_private *listen_id_priv) 354 { 355 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 356 struct cma_device *cma_dev; 357 union ib_gid gid, iboe_gid; 358 int ret = -ENODEV; 359 u8 port, found_port; 360 enum rdma_link_layer dev_ll = dev_addr->dev_type == ARPHRD_INFINIBAND ? 361 IB_LINK_LAYER_INFINIBAND : IB_LINK_LAYER_ETHERNET; 362 363 if (dev_ll != IB_LINK_LAYER_INFINIBAND && 364 id_priv->id.ps == RDMA_PS_IPOIB) 365 return -EINVAL; 366 367 mutex_lock(&lock); 368 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr, 369 &iboe_gid); 370 371 memcpy(&gid, dev_addr->src_dev_addr + 372 rdma_addr_gid_offset(dev_addr), sizeof gid); 373 if (listen_id_priv && 374 rdma_port_get_link_layer(listen_id_priv->id.device, 375 listen_id_priv->id.port_num) == dev_ll) { 376 cma_dev = listen_id_priv->cma_dev; 377 port = listen_id_priv->id.port_num; 378 if (rdma_node_get_transport(cma_dev->device->node_type) == RDMA_TRANSPORT_IB && 379 rdma_port_get_link_layer(cma_dev->device, port) == IB_LINK_LAYER_ETHERNET) 380 ret = ib_find_cached_gid(cma_dev->device, &iboe_gid, 381 &found_port, NULL); 382 else 383 ret = ib_find_cached_gid(cma_dev->device, &gid, 384 &found_port, NULL); 385 386 if (!ret && (port == found_port)) { 387 id_priv->id.port_num = found_port; 388 goto out; 389 } 390 } 391 list_for_each_entry(cma_dev, &dev_list, list) { 392 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) { 393 if (listen_id_priv && 394 listen_id_priv->cma_dev == cma_dev && 395 listen_id_priv->id.port_num == port) 396 continue; 397 if (rdma_port_get_link_layer(cma_dev->device, port) == dev_ll) { 398 if (rdma_node_get_transport(cma_dev->device->node_type) == RDMA_TRANSPORT_IB && 399 rdma_port_get_link_layer(cma_dev->device, port) == IB_LINK_LAYER_ETHERNET) 400 ret = ib_find_cached_gid(cma_dev->device, &iboe_gid, &found_port, NULL); 401 else 402 ret = ib_find_cached_gid(cma_dev->device, &gid, &found_port, NULL); 403 404 if (!ret && (port == found_port)) { 405 id_priv->id.port_num = found_port; 406 goto out; 407 } 408 } 409 } 410 } 411 412 out: 413 if (!ret) 414 cma_attach_to_dev(id_priv, cma_dev); 415 416 mutex_unlock(&lock); 417 return ret; 418 } 419 420 /* 421 * Select the source IB device and address to reach the destination IB address. 422 */ 423 static int cma_resolve_ib_dev(struct rdma_id_private *id_priv) 424 { 425 struct cma_device *cma_dev, *cur_dev; 426 struct sockaddr_ib *addr; 427 union ib_gid gid, sgid, *dgid; 428 u16 pkey, index; 429 u8 p; 430 int i; 431 432 cma_dev = NULL; 433 addr = (struct sockaddr_ib *) cma_dst_addr(id_priv); 434 dgid = (union ib_gid *) &addr->sib_addr; 435 pkey = ntohs(addr->sib_pkey); 436 437 list_for_each_entry(cur_dev, &dev_list, list) { 438 if (rdma_node_get_transport(cur_dev->device->node_type) != RDMA_TRANSPORT_IB) 439 continue; 440 441 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) { 442 if (ib_find_cached_pkey(cur_dev->device, p, pkey, &index)) 443 continue; 444 445 for (i = 0; !ib_get_cached_gid(cur_dev->device, p, i, &gid); i++) { 446 if (!memcmp(&gid, dgid, sizeof(gid))) { 447 cma_dev = cur_dev; 448 sgid = gid; 449 id_priv->id.port_num = p; 450 goto found; 451 } 452 453 if (!cma_dev && (gid.global.subnet_prefix == 454 dgid->global.subnet_prefix)) { 455 cma_dev = cur_dev; 456 sgid = gid; 457 id_priv->id.port_num = p; 458 } 459 } 460 } 461 } 462 463 if (!cma_dev) 464 return -ENODEV; 465 466 found: 467 cma_attach_to_dev(id_priv, cma_dev); 468 addr = (struct sockaddr_ib *) cma_src_addr(id_priv); 469 memcpy(&addr->sib_addr, &sgid, sizeof sgid); 470 cma_translate_ib(addr, &id_priv->id.route.addr.dev_addr); 471 return 0; 472 } 473 474 static void cma_deref_id(struct rdma_id_private *id_priv) 475 { 476 if (atomic_dec_and_test(&id_priv->refcount)) 477 complete(&id_priv->comp); 478 } 479 480 static int cma_disable_callback(struct rdma_id_private *id_priv, 481 enum rdma_cm_state state) 482 { 483 mutex_lock(&id_priv->handler_mutex); 484 if (id_priv->state != state) { 485 mutex_unlock(&id_priv->handler_mutex); 486 return -EINVAL; 487 } 488 return 0; 489 } 490 491 struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler, 492 void *context, enum rdma_port_space ps, 493 enum ib_qp_type qp_type) 494 { 495 struct rdma_id_private *id_priv; 496 497 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL); 498 if (!id_priv) 499 return ERR_PTR(-ENOMEM); 500 501 id_priv->owner = task_pid_nr(current); 502 id_priv->state = RDMA_CM_IDLE; 503 id_priv->id.context = context; 504 id_priv->id.event_handler = event_handler; 505 id_priv->id.ps = ps; 506 id_priv->id.qp_type = qp_type; 507 spin_lock_init(&id_priv->lock); 508 mutex_init(&id_priv->qp_mutex); 509 init_completion(&id_priv->comp); 510 atomic_set(&id_priv->refcount, 1); 511 mutex_init(&id_priv->handler_mutex); 512 INIT_LIST_HEAD(&id_priv->listen_list); 513 INIT_LIST_HEAD(&id_priv->mc_list); 514 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num); 515 516 return &id_priv->id; 517 } 518 EXPORT_SYMBOL(rdma_create_id); 519 520 static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp) 521 { 522 struct ib_qp_attr qp_attr; 523 int qp_attr_mask, ret; 524 525 qp_attr.qp_state = IB_QPS_INIT; 526 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 527 if (ret) 528 return ret; 529 530 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); 531 if (ret) 532 return ret; 533 534 qp_attr.qp_state = IB_QPS_RTR; 535 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE); 536 if (ret) 537 return ret; 538 539 qp_attr.qp_state = IB_QPS_RTS; 540 qp_attr.sq_psn = 0; 541 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN); 542 543 return ret; 544 } 545 546 static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp) 547 { 548 struct ib_qp_attr qp_attr; 549 int qp_attr_mask, ret; 550 551 qp_attr.qp_state = IB_QPS_INIT; 552 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 553 if (ret) 554 return ret; 555 556 return ib_modify_qp(qp, &qp_attr, qp_attr_mask); 557 } 558 559 int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd, 560 struct ib_qp_init_attr *qp_init_attr) 561 { 562 struct rdma_id_private *id_priv; 563 struct ib_qp *qp; 564 int ret; 565 566 id_priv = container_of(id, struct rdma_id_private, id); 567 if (id->device != pd->device) 568 return -EINVAL; 569 570 qp = ib_create_qp(pd, qp_init_attr); 571 if (IS_ERR(qp)) 572 return PTR_ERR(qp); 573 574 if (id->qp_type == IB_QPT_UD) 575 ret = cma_init_ud_qp(id_priv, qp); 576 else 577 ret = cma_init_conn_qp(id_priv, qp); 578 if (ret) 579 goto err; 580 581 id->qp = qp; 582 id_priv->qp_num = qp->qp_num; 583 id_priv->srq = (qp->srq != NULL); 584 return 0; 585 err: 586 ib_destroy_qp(qp); 587 return ret; 588 } 589 EXPORT_SYMBOL(rdma_create_qp); 590 591 void rdma_destroy_qp(struct rdma_cm_id *id) 592 { 593 struct rdma_id_private *id_priv; 594 595 id_priv = container_of(id, struct rdma_id_private, id); 596 mutex_lock(&id_priv->qp_mutex); 597 ib_destroy_qp(id_priv->id.qp); 598 id_priv->id.qp = NULL; 599 mutex_unlock(&id_priv->qp_mutex); 600 } 601 EXPORT_SYMBOL(rdma_destroy_qp); 602 603 static int cma_modify_qp_rtr(struct rdma_id_private *id_priv, 604 struct rdma_conn_param *conn_param) 605 { 606 struct ib_qp_attr qp_attr; 607 int qp_attr_mask, ret; 608 union ib_gid sgid; 609 610 mutex_lock(&id_priv->qp_mutex); 611 if (!id_priv->id.qp) { 612 ret = 0; 613 goto out; 614 } 615 616 /* Need to update QP attributes from default values. */ 617 qp_attr.qp_state = IB_QPS_INIT; 618 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 619 if (ret) 620 goto out; 621 622 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); 623 if (ret) 624 goto out; 625 626 qp_attr.qp_state = IB_QPS_RTR; 627 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 628 if (ret) 629 goto out; 630 631 ret = ib_query_gid(id_priv->id.device, id_priv->id.port_num, 632 qp_attr.ah_attr.grh.sgid_index, &sgid); 633 if (ret) 634 goto out; 635 636 if (rdma_node_get_transport(id_priv->cma_dev->device->node_type) 637 == RDMA_TRANSPORT_IB && 638 rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num) 639 == IB_LINK_LAYER_ETHERNET) { 640 ret = rdma_addr_find_smac_by_sgid(&sgid, qp_attr.smac, NULL); 641 642 if (ret) 643 goto out; 644 } 645 if (conn_param) 646 qp_attr.max_dest_rd_atomic = conn_param->responder_resources; 647 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); 648 out: 649 mutex_unlock(&id_priv->qp_mutex); 650 return ret; 651 } 652 653 static int cma_modify_qp_rts(struct rdma_id_private *id_priv, 654 struct rdma_conn_param *conn_param) 655 { 656 struct ib_qp_attr qp_attr; 657 int qp_attr_mask, ret; 658 659 mutex_lock(&id_priv->qp_mutex); 660 if (!id_priv->id.qp) { 661 ret = 0; 662 goto out; 663 } 664 665 qp_attr.qp_state = IB_QPS_RTS; 666 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 667 if (ret) 668 goto out; 669 670 if (conn_param) 671 qp_attr.max_rd_atomic = conn_param->initiator_depth; 672 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); 673 out: 674 mutex_unlock(&id_priv->qp_mutex); 675 return ret; 676 } 677 678 static int cma_modify_qp_err(struct rdma_id_private *id_priv) 679 { 680 struct ib_qp_attr qp_attr; 681 int ret; 682 683 mutex_lock(&id_priv->qp_mutex); 684 if (!id_priv->id.qp) { 685 ret = 0; 686 goto out; 687 } 688 689 qp_attr.qp_state = IB_QPS_ERR; 690 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE); 691 out: 692 mutex_unlock(&id_priv->qp_mutex); 693 return ret; 694 } 695 696 static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv, 697 struct ib_qp_attr *qp_attr, int *qp_attr_mask) 698 { 699 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 700 int ret; 701 u16 pkey; 702 703 if (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num) == 704 IB_LINK_LAYER_INFINIBAND) 705 pkey = ib_addr_get_pkey(dev_addr); 706 else 707 pkey = 0xffff; 708 709 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num, 710 pkey, &qp_attr->pkey_index); 711 if (ret) 712 return ret; 713 714 qp_attr->port_num = id_priv->id.port_num; 715 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT; 716 717 if (id_priv->id.qp_type == IB_QPT_UD) { 718 ret = cma_set_qkey(id_priv, 0); 719 if (ret) 720 return ret; 721 722 qp_attr->qkey = id_priv->qkey; 723 *qp_attr_mask |= IB_QP_QKEY; 724 } else { 725 qp_attr->qp_access_flags = 0; 726 *qp_attr_mask |= IB_QP_ACCESS_FLAGS; 727 } 728 return 0; 729 } 730 731 int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr, 732 int *qp_attr_mask) 733 { 734 struct rdma_id_private *id_priv; 735 int ret = 0; 736 737 id_priv = container_of(id, struct rdma_id_private, id); 738 switch (rdma_node_get_transport(id_priv->id.device->node_type)) { 739 case RDMA_TRANSPORT_IB: 740 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD)) 741 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask); 742 else 743 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr, 744 qp_attr_mask); 745 746 if (qp_attr->qp_state == IB_QPS_RTR) 747 qp_attr->rq_psn = id_priv->seq_num; 748 break; 749 case RDMA_TRANSPORT_IWARP: 750 if (!id_priv->cm_id.iw) { 751 qp_attr->qp_access_flags = 0; 752 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS; 753 } else 754 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr, 755 qp_attr_mask); 756 break; 757 default: 758 ret = -ENOSYS; 759 break; 760 } 761 762 return ret; 763 } 764 EXPORT_SYMBOL(rdma_init_qp_attr); 765 766 static inline int cma_zero_addr(struct sockaddr *addr) 767 { 768 switch (addr->sa_family) { 769 case AF_INET: 770 return ipv4_is_zeronet(((struct sockaddr_in *)addr)->sin_addr.s_addr); 771 case AF_INET6: 772 return ipv6_addr_any(&((struct sockaddr_in6 *) addr)->sin6_addr); 773 case AF_IB: 774 return ib_addr_any(&((struct sockaddr_ib *) addr)->sib_addr); 775 default: 776 return 0; 777 } 778 } 779 780 static inline int cma_loopback_addr(struct sockaddr *addr) 781 { 782 switch (addr->sa_family) { 783 case AF_INET: 784 return ipv4_is_loopback(((struct sockaddr_in *) addr)->sin_addr.s_addr); 785 case AF_INET6: 786 return ipv6_addr_loopback(&((struct sockaddr_in6 *) addr)->sin6_addr); 787 case AF_IB: 788 return ib_addr_loopback(&((struct sockaddr_ib *) addr)->sib_addr); 789 default: 790 return 0; 791 } 792 } 793 794 static inline int cma_any_addr(struct sockaddr *addr) 795 { 796 return cma_zero_addr(addr) || cma_loopback_addr(addr); 797 } 798 799 static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst) 800 { 801 if (src->sa_family != dst->sa_family) 802 return -1; 803 804 switch (src->sa_family) { 805 case AF_INET: 806 return ((struct sockaddr_in *) src)->sin_addr.s_addr != 807 ((struct sockaddr_in *) dst)->sin_addr.s_addr; 808 case AF_INET6: 809 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr, 810 &((struct sockaddr_in6 *) dst)->sin6_addr); 811 default: 812 return ib_addr_cmp(&((struct sockaddr_ib *) src)->sib_addr, 813 &((struct sockaddr_ib *) dst)->sib_addr); 814 } 815 } 816 817 static __be16 cma_port(struct sockaddr *addr) 818 { 819 struct sockaddr_ib *sib; 820 821 switch (addr->sa_family) { 822 case AF_INET: 823 return ((struct sockaddr_in *) addr)->sin_port; 824 case AF_INET6: 825 return ((struct sockaddr_in6 *) addr)->sin6_port; 826 case AF_IB: 827 sib = (struct sockaddr_ib *) addr; 828 return htons((u16) (be64_to_cpu(sib->sib_sid) & 829 be64_to_cpu(sib->sib_sid_mask))); 830 default: 831 return 0; 832 } 833 } 834 835 static inline int cma_any_port(struct sockaddr *addr) 836 { 837 return !cma_port(addr); 838 } 839 840 static void cma_save_ib_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id, 841 struct ib_sa_path_rec *path) 842 { 843 struct sockaddr_ib *listen_ib, *ib; 844 845 listen_ib = (struct sockaddr_ib *) &listen_id->route.addr.src_addr; 846 ib = (struct sockaddr_ib *) &id->route.addr.src_addr; 847 ib->sib_family = listen_ib->sib_family; 848 ib->sib_pkey = path->pkey; 849 ib->sib_flowinfo = path->flow_label; 850 memcpy(&ib->sib_addr, &path->sgid, 16); 851 ib->sib_sid = listen_ib->sib_sid; 852 ib->sib_sid_mask = cpu_to_be64(0xffffffffffffffffULL); 853 ib->sib_scope_id = listen_ib->sib_scope_id; 854 855 ib = (struct sockaddr_ib *) &id->route.addr.dst_addr; 856 ib->sib_family = listen_ib->sib_family; 857 ib->sib_pkey = path->pkey; 858 ib->sib_flowinfo = path->flow_label; 859 memcpy(&ib->sib_addr, &path->dgid, 16); 860 } 861 862 static __be16 ss_get_port(const struct sockaddr_storage *ss) 863 { 864 if (ss->ss_family == AF_INET) 865 return ((struct sockaddr_in *)ss)->sin_port; 866 else if (ss->ss_family == AF_INET6) 867 return ((struct sockaddr_in6 *)ss)->sin6_port; 868 BUG(); 869 } 870 871 static void cma_save_ip4_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id, 872 struct cma_hdr *hdr) 873 { 874 struct sockaddr_in *ip4; 875 876 ip4 = (struct sockaddr_in *) &id->route.addr.src_addr; 877 ip4->sin_family = AF_INET; 878 ip4->sin_addr.s_addr = hdr->dst_addr.ip4.addr; 879 ip4->sin_port = ss_get_port(&listen_id->route.addr.src_addr); 880 881 ip4 = (struct sockaddr_in *) &id->route.addr.dst_addr; 882 ip4->sin_family = AF_INET; 883 ip4->sin_addr.s_addr = hdr->src_addr.ip4.addr; 884 ip4->sin_port = hdr->port; 885 } 886 887 static void cma_save_ip6_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id, 888 struct cma_hdr *hdr) 889 { 890 struct sockaddr_in6 *ip6; 891 892 ip6 = (struct sockaddr_in6 *) &id->route.addr.src_addr; 893 ip6->sin6_family = AF_INET6; 894 ip6->sin6_addr = hdr->dst_addr.ip6; 895 ip6->sin6_port = ss_get_port(&listen_id->route.addr.src_addr); 896 897 ip6 = (struct sockaddr_in6 *) &id->route.addr.dst_addr; 898 ip6->sin6_family = AF_INET6; 899 ip6->sin6_addr = hdr->src_addr.ip6; 900 ip6->sin6_port = hdr->port; 901 } 902 903 static int cma_save_net_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id, 904 struct ib_cm_event *ib_event) 905 { 906 struct cma_hdr *hdr; 907 908 if ((listen_id->route.addr.src_addr.ss_family == AF_IB) && 909 (ib_event->event == IB_CM_REQ_RECEIVED)) { 910 cma_save_ib_info(id, listen_id, ib_event->param.req_rcvd.primary_path); 911 return 0; 912 } 913 914 hdr = ib_event->private_data; 915 if (hdr->cma_version != CMA_VERSION) 916 return -EINVAL; 917 918 switch (cma_get_ip_ver(hdr)) { 919 case 4: 920 cma_save_ip4_info(id, listen_id, hdr); 921 break; 922 case 6: 923 cma_save_ip6_info(id, listen_id, hdr); 924 break; 925 default: 926 return -EINVAL; 927 } 928 return 0; 929 } 930 931 static inline int cma_user_data_offset(struct rdma_id_private *id_priv) 932 { 933 return cma_family(id_priv) == AF_IB ? 0 : sizeof(struct cma_hdr); 934 } 935 936 static void cma_cancel_route(struct rdma_id_private *id_priv) 937 { 938 switch (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num)) { 939 case IB_LINK_LAYER_INFINIBAND: 940 if (id_priv->query) 941 ib_sa_cancel_query(id_priv->query_id, id_priv->query); 942 break; 943 default: 944 break; 945 } 946 } 947 948 static void cma_cancel_listens(struct rdma_id_private *id_priv) 949 { 950 struct rdma_id_private *dev_id_priv; 951 952 /* 953 * Remove from listen_any_list to prevent added devices from spawning 954 * additional listen requests. 955 */ 956 mutex_lock(&lock); 957 list_del(&id_priv->list); 958 959 while (!list_empty(&id_priv->listen_list)) { 960 dev_id_priv = list_entry(id_priv->listen_list.next, 961 struct rdma_id_private, listen_list); 962 /* sync with device removal to avoid duplicate destruction */ 963 list_del_init(&dev_id_priv->list); 964 list_del(&dev_id_priv->listen_list); 965 mutex_unlock(&lock); 966 967 rdma_destroy_id(&dev_id_priv->id); 968 mutex_lock(&lock); 969 } 970 mutex_unlock(&lock); 971 } 972 973 static void cma_cancel_operation(struct rdma_id_private *id_priv, 974 enum rdma_cm_state state) 975 { 976 switch (state) { 977 case RDMA_CM_ADDR_QUERY: 978 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr); 979 break; 980 case RDMA_CM_ROUTE_QUERY: 981 cma_cancel_route(id_priv); 982 break; 983 case RDMA_CM_LISTEN: 984 if (cma_any_addr(cma_src_addr(id_priv)) && !id_priv->cma_dev) 985 cma_cancel_listens(id_priv); 986 break; 987 default: 988 break; 989 } 990 } 991 992 static void cma_release_port(struct rdma_id_private *id_priv) 993 { 994 struct rdma_bind_list *bind_list = id_priv->bind_list; 995 996 if (!bind_list) 997 return; 998 999 mutex_lock(&lock); 1000 hlist_del(&id_priv->node); 1001 if (hlist_empty(&bind_list->owners)) { 1002 idr_remove(bind_list->ps, bind_list->port); 1003 kfree(bind_list); 1004 } 1005 mutex_unlock(&lock); 1006 } 1007 1008 static void cma_leave_mc_groups(struct rdma_id_private *id_priv) 1009 { 1010 struct cma_multicast *mc; 1011 1012 while (!list_empty(&id_priv->mc_list)) { 1013 mc = container_of(id_priv->mc_list.next, 1014 struct cma_multicast, list); 1015 list_del(&mc->list); 1016 switch (rdma_port_get_link_layer(id_priv->cma_dev->device, id_priv->id.port_num)) { 1017 case IB_LINK_LAYER_INFINIBAND: 1018 ib_sa_free_multicast(mc->multicast.ib); 1019 kfree(mc); 1020 break; 1021 case IB_LINK_LAYER_ETHERNET: 1022 kref_put(&mc->mcref, release_mc); 1023 break; 1024 default: 1025 break; 1026 } 1027 } 1028 } 1029 1030 void rdma_destroy_id(struct rdma_cm_id *id) 1031 { 1032 struct rdma_id_private *id_priv; 1033 enum rdma_cm_state state; 1034 1035 id_priv = container_of(id, struct rdma_id_private, id); 1036 state = cma_exch(id_priv, RDMA_CM_DESTROYING); 1037 cma_cancel_operation(id_priv, state); 1038 1039 /* 1040 * Wait for any active callback to finish. New callbacks will find 1041 * the id_priv state set to destroying and abort. 1042 */ 1043 mutex_lock(&id_priv->handler_mutex); 1044 mutex_unlock(&id_priv->handler_mutex); 1045 1046 if (id_priv->cma_dev) { 1047 switch (rdma_node_get_transport(id_priv->id.device->node_type)) { 1048 case RDMA_TRANSPORT_IB: 1049 if (id_priv->cm_id.ib) 1050 ib_destroy_cm_id(id_priv->cm_id.ib); 1051 break; 1052 case RDMA_TRANSPORT_IWARP: 1053 if (id_priv->cm_id.iw) 1054 iw_destroy_cm_id(id_priv->cm_id.iw); 1055 break; 1056 default: 1057 break; 1058 } 1059 cma_leave_mc_groups(id_priv); 1060 cma_release_dev(id_priv); 1061 } 1062 1063 cma_release_port(id_priv); 1064 cma_deref_id(id_priv); 1065 wait_for_completion(&id_priv->comp); 1066 1067 if (id_priv->internal_id) 1068 cma_deref_id(id_priv->id.context); 1069 1070 kfree(id_priv->id.route.path_rec); 1071 kfree(id_priv); 1072 } 1073 EXPORT_SYMBOL(rdma_destroy_id); 1074 1075 static int cma_rep_recv(struct rdma_id_private *id_priv) 1076 { 1077 int ret; 1078 1079 ret = cma_modify_qp_rtr(id_priv, NULL); 1080 if (ret) 1081 goto reject; 1082 1083 ret = cma_modify_qp_rts(id_priv, NULL); 1084 if (ret) 1085 goto reject; 1086 1087 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0); 1088 if (ret) 1089 goto reject; 1090 1091 return 0; 1092 reject: 1093 cma_modify_qp_err(id_priv); 1094 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED, 1095 NULL, 0, NULL, 0); 1096 return ret; 1097 } 1098 1099 static void cma_set_rep_event_data(struct rdma_cm_event *event, 1100 struct ib_cm_rep_event_param *rep_data, 1101 void *private_data) 1102 { 1103 event->param.conn.private_data = private_data; 1104 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE; 1105 event->param.conn.responder_resources = rep_data->responder_resources; 1106 event->param.conn.initiator_depth = rep_data->initiator_depth; 1107 event->param.conn.flow_control = rep_data->flow_control; 1108 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count; 1109 event->param.conn.srq = rep_data->srq; 1110 event->param.conn.qp_num = rep_data->remote_qpn; 1111 } 1112 1113 static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) 1114 { 1115 struct rdma_id_private *id_priv = cm_id->context; 1116 struct rdma_cm_event event; 1117 int ret = 0; 1118 1119 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT && 1120 cma_disable_callback(id_priv, RDMA_CM_CONNECT)) || 1121 (ib_event->event == IB_CM_TIMEWAIT_EXIT && 1122 cma_disable_callback(id_priv, RDMA_CM_DISCONNECT))) 1123 return 0; 1124 1125 memset(&event, 0, sizeof event); 1126 switch (ib_event->event) { 1127 case IB_CM_REQ_ERROR: 1128 case IB_CM_REP_ERROR: 1129 event.event = RDMA_CM_EVENT_UNREACHABLE; 1130 event.status = -ETIMEDOUT; 1131 break; 1132 case IB_CM_REP_RECEIVED: 1133 if (id_priv->id.qp) { 1134 event.status = cma_rep_recv(id_priv); 1135 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR : 1136 RDMA_CM_EVENT_ESTABLISHED; 1137 } else { 1138 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE; 1139 } 1140 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd, 1141 ib_event->private_data); 1142 break; 1143 case IB_CM_RTU_RECEIVED: 1144 case IB_CM_USER_ESTABLISHED: 1145 event.event = RDMA_CM_EVENT_ESTABLISHED; 1146 break; 1147 case IB_CM_DREQ_ERROR: 1148 event.status = -ETIMEDOUT; /* fall through */ 1149 case IB_CM_DREQ_RECEIVED: 1150 case IB_CM_DREP_RECEIVED: 1151 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT, 1152 RDMA_CM_DISCONNECT)) 1153 goto out; 1154 event.event = RDMA_CM_EVENT_DISCONNECTED; 1155 break; 1156 case IB_CM_TIMEWAIT_EXIT: 1157 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT; 1158 break; 1159 case IB_CM_MRA_RECEIVED: 1160 /* ignore event */ 1161 goto out; 1162 case IB_CM_REJ_RECEIVED: 1163 cma_modify_qp_err(id_priv); 1164 event.status = ib_event->param.rej_rcvd.reason; 1165 event.event = RDMA_CM_EVENT_REJECTED; 1166 event.param.conn.private_data = ib_event->private_data; 1167 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE; 1168 break; 1169 default: 1170 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n", 1171 ib_event->event); 1172 goto out; 1173 } 1174 1175 ret = id_priv->id.event_handler(&id_priv->id, &event); 1176 if (ret) { 1177 /* Destroy the CM ID by returning a non-zero value. */ 1178 id_priv->cm_id.ib = NULL; 1179 cma_exch(id_priv, RDMA_CM_DESTROYING); 1180 mutex_unlock(&id_priv->handler_mutex); 1181 rdma_destroy_id(&id_priv->id); 1182 return ret; 1183 } 1184 out: 1185 mutex_unlock(&id_priv->handler_mutex); 1186 return ret; 1187 } 1188 1189 static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id, 1190 struct ib_cm_event *ib_event) 1191 { 1192 struct rdma_id_private *id_priv; 1193 struct rdma_cm_id *id; 1194 struct rdma_route *rt; 1195 int ret; 1196 1197 id = rdma_create_id(listen_id->event_handler, listen_id->context, 1198 listen_id->ps, ib_event->param.req_rcvd.qp_type); 1199 if (IS_ERR(id)) 1200 return NULL; 1201 1202 id_priv = container_of(id, struct rdma_id_private, id); 1203 if (cma_save_net_info(id, listen_id, ib_event)) 1204 goto err; 1205 1206 rt = &id->route; 1207 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1; 1208 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths, 1209 GFP_KERNEL); 1210 if (!rt->path_rec) 1211 goto err; 1212 1213 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path; 1214 if (rt->num_paths == 2) 1215 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path; 1216 1217 if (cma_any_addr(cma_src_addr(id_priv))) { 1218 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND; 1219 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid); 1220 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey)); 1221 } else { 1222 ret = cma_translate_addr(cma_src_addr(id_priv), &rt->addr.dev_addr); 1223 if (ret) 1224 goto err; 1225 } 1226 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid); 1227 1228 id_priv->state = RDMA_CM_CONNECT; 1229 return id_priv; 1230 1231 err: 1232 rdma_destroy_id(id); 1233 return NULL; 1234 } 1235 1236 static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id, 1237 struct ib_cm_event *ib_event) 1238 { 1239 struct rdma_id_private *id_priv; 1240 struct rdma_cm_id *id; 1241 int ret; 1242 1243 id = rdma_create_id(listen_id->event_handler, listen_id->context, 1244 listen_id->ps, IB_QPT_UD); 1245 if (IS_ERR(id)) 1246 return NULL; 1247 1248 id_priv = container_of(id, struct rdma_id_private, id); 1249 if (cma_save_net_info(id, listen_id, ib_event)) 1250 goto err; 1251 1252 if (!cma_any_addr((struct sockaddr *) &id->route.addr.src_addr)) { 1253 ret = cma_translate_addr(cma_src_addr(id_priv), &id->route.addr.dev_addr); 1254 if (ret) 1255 goto err; 1256 } 1257 1258 id_priv->state = RDMA_CM_CONNECT; 1259 return id_priv; 1260 err: 1261 rdma_destroy_id(id); 1262 return NULL; 1263 } 1264 1265 static void cma_set_req_event_data(struct rdma_cm_event *event, 1266 struct ib_cm_req_event_param *req_data, 1267 void *private_data, int offset) 1268 { 1269 event->param.conn.private_data = private_data + offset; 1270 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset; 1271 event->param.conn.responder_resources = req_data->responder_resources; 1272 event->param.conn.initiator_depth = req_data->initiator_depth; 1273 event->param.conn.flow_control = req_data->flow_control; 1274 event->param.conn.retry_count = req_data->retry_count; 1275 event->param.conn.rnr_retry_count = req_data->rnr_retry_count; 1276 event->param.conn.srq = req_data->srq; 1277 event->param.conn.qp_num = req_data->remote_qpn; 1278 } 1279 1280 static int cma_check_req_qp_type(struct rdma_cm_id *id, struct ib_cm_event *ib_event) 1281 { 1282 return (((ib_event->event == IB_CM_REQ_RECEIVED) && 1283 (ib_event->param.req_rcvd.qp_type == id->qp_type)) || 1284 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) && 1285 (id->qp_type == IB_QPT_UD)) || 1286 (!id->qp_type)); 1287 } 1288 1289 static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) 1290 { 1291 struct rdma_id_private *listen_id, *conn_id; 1292 struct rdma_cm_event event; 1293 int offset, ret; 1294 1295 listen_id = cm_id->context; 1296 if (!cma_check_req_qp_type(&listen_id->id, ib_event)) 1297 return -EINVAL; 1298 1299 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN)) 1300 return -ECONNABORTED; 1301 1302 memset(&event, 0, sizeof event); 1303 offset = cma_user_data_offset(listen_id); 1304 event.event = RDMA_CM_EVENT_CONNECT_REQUEST; 1305 if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) { 1306 conn_id = cma_new_udp_id(&listen_id->id, ib_event); 1307 event.param.ud.private_data = ib_event->private_data + offset; 1308 event.param.ud.private_data_len = 1309 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset; 1310 } else { 1311 conn_id = cma_new_conn_id(&listen_id->id, ib_event); 1312 cma_set_req_event_data(&event, &ib_event->param.req_rcvd, 1313 ib_event->private_data, offset); 1314 } 1315 if (!conn_id) { 1316 ret = -ENOMEM; 1317 goto err1; 1318 } 1319 1320 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING); 1321 ret = cma_acquire_dev(conn_id, listen_id); 1322 if (ret) 1323 goto err2; 1324 1325 conn_id->cm_id.ib = cm_id; 1326 cm_id->context = conn_id; 1327 cm_id->cm_handler = cma_ib_handler; 1328 1329 /* 1330 * Protect against the user destroying conn_id from another thread 1331 * until we're done accessing it. 1332 */ 1333 atomic_inc(&conn_id->refcount); 1334 ret = conn_id->id.event_handler(&conn_id->id, &event); 1335 if (ret) 1336 goto err3; 1337 /* 1338 * Acquire mutex to prevent user executing rdma_destroy_id() 1339 * while we're accessing the cm_id. 1340 */ 1341 mutex_lock(&lock); 1342 if (cma_comp(conn_id, RDMA_CM_CONNECT) && 1343 (conn_id->id.qp_type != IB_QPT_UD)) 1344 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0); 1345 mutex_unlock(&lock); 1346 mutex_unlock(&conn_id->handler_mutex); 1347 mutex_unlock(&listen_id->handler_mutex); 1348 cma_deref_id(conn_id); 1349 return 0; 1350 1351 err3: 1352 cma_deref_id(conn_id); 1353 /* Destroy the CM ID by returning a non-zero value. */ 1354 conn_id->cm_id.ib = NULL; 1355 err2: 1356 cma_exch(conn_id, RDMA_CM_DESTROYING); 1357 mutex_unlock(&conn_id->handler_mutex); 1358 err1: 1359 mutex_unlock(&listen_id->handler_mutex); 1360 if (conn_id) 1361 rdma_destroy_id(&conn_id->id); 1362 return ret; 1363 } 1364 1365 __be64 rdma_get_service_id(struct rdma_cm_id *id, struct sockaddr *addr) 1366 { 1367 if (addr->sa_family == AF_IB) 1368 return ((struct sockaddr_ib *) addr)->sib_sid; 1369 1370 return cpu_to_be64(((u64)id->ps << 16) + be16_to_cpu(cma_port(addr))); 1371 } 1372 EXPORT_SYMBOL(rdma_get_service_id); 1373 1374 static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr, 1375 struct ib_cm_compare_data *compare) 1376 { 1377 struct cma_hdr *cma_data, *cma_mask; 1378 __be32 ip4_addr; 1379 struct in6_addr ip6_addr; 1380 1381 memset(compare, 0, sizeof *compare); 1382 cma_data = (void *) compare->data; 1383 cma_mask = (void *) compare->mask; 1384 1385 switch (addr->sa_family) { 1386 case AF_INET: 1387 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr; 1388 cma_set_ip_ver(cma_data, 4); 1389 cma_set_ip_ver(cma_mask, 0xF); 1390 if (!cma_any_addr(addr)) { 1391 cma_data->dst_addr.ip4.addr = ip4_addr; 1392 cma_mask->dst_addr.ip4.addr = htonl(~0); 1393 } 1394 break; 1395 case AF_INET6: 1396 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr; 1397 cma_set_ip_ver(cma_data, 6); 1398 cma_set_ip_ver(cma_mask, 0xF); 1399 if (!cma_any_addr(addr)) { 1400 cma_data->dst_addr.ip6 = ip6_addr; 1401 memset(&cma_mask->dst_addr.ip6, 0xFF, 1402 sizeof cma_mask->dst_addr.ip6); 1403 } 1404 break; 1405 default: 1406 break; 1407 } 1408 } 1409 1410 static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event) 1411 { 1412 struct rdma_id_private *id_priv = iw_id->context; 1413 struct rdma_cm_event event; 1414 int ret = 0; 1415 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr; 1416 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr; 1417 1418 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT)) 1419 return 0; 1420 1421 memset(&event, 0, sizeof event); 1422 switch (iw_event->event) { 1423 case IW_CM_EVENT_CLOSE: 1424 event.event = RDMA_CM_EVENT_DISCONNECTED; 1425 break; 1426 case IW_CM_EVENT_CONNECT_REPLY: 1427 memcpy(cma_src_addr(id_priv), laddr, 1428 rdma_addr_size(laddr)); 1429 memcpy(cma_dst_addr(id_priv), raddr, 1430 rdma_addr_size(raddr)); 1431 switch (iw_event->status) { 1432 case 0: 1433 event.event = RDMA_CM_EVENT_ESTABLISHED; 1434 event.param.conn.initiator_depth = iw_event->ird; 1435 event.param.conn.responder_resources = iw_event->ord; 1436 break; 1437 case -ECONNRESET: 1438 case -ECONNREFUSED: 1439 event.event = RDMA_CM_EVENT_REJECTED; 1440 break; 1441 case -ETIMEDOUT: 1442 event.event = RDMA_CM_EVENT_UNREACHABLE; 1443 break; 1444 default: 1445 event.event = RDMA_CM_EVENT_CONNECT_ERROR; 1446 break; 1447 } 1448 break; 1449 case IW_CM_EVENT_ESTABLISHED: 1450 event.event = RDMA_CM_EVENT_ESTABLISHED; 1451 event.param.conn.initiator_depth = iw_event->ird; 1452 event.param.conn.responder_resources = iw_event->ord; 1453 break; 1454 default: 1455 BUG_ON(1); 1456 } 1457 1458 event.status = iw_event->status; 1459 event.param.conn.private_data = iw_event->private_data; 1460 event.param.conn.private_data_len = iw_event->private_data_len; 1461 ret = id_priv->id.event_handler(&id_priv->id, &event); 1462 if (ret) { 1463 /* Destroy the CM ID by returning a non-zero value. */ 1464 id_priv->cm_id.iw = NULL; 1465 cma_exch(id_priv, RDMA_CM_DESTROYING); 1466 mutex_unlock(&id_priv->handler_mutex); 1467 rdma_destroy_id(&id_priv->id); 1468 return ret; 1469 } 1470 1471 mutex_unlock(&id_priv->handler_mutex); 1472 return ret; 1473 } 1474 1475 static int iw_conn_req_handler(struct iw_cm_id *cm_id, 1476 struct iw_cm_event *iw_event) 1477 { 1478 struct rdma_cm_id *new_cm_id; 1479 struct rdma_id_private *listen_id, *conn_id; 1480 struct rdma_cm_event event; 1481 int ret; 1482 struct ib_device_attr attr; 1483 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr; 1484 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr; 1485 1486 listen_id = cm_id->context; 1487 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN)) 1488 return -ECONNABORTED; 1489 1490 /* Create a new RDMA id for the new IW CM ID */ 1491 new_cm_id = rdma_create_id(listen_id->id.event_handler, 1492 listen_id->id.context, 1493 RDMA_PS_TCP, IB_QPT_RC); 1494 if (IS_ERR(new_cm_id)) { 1495 ret = -ENOMEM; 1496 goto out; 1497 } 1498 conn_id = container_of(new_cm_id, struct rdma_id_private, id); 1499 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING); 1500 conn_id->state = RDMA_CM_CONNECT; 1501 1502 ret = rdma_translate_ip(laddr, &conn_id->id.route.addr.dev_addr, NULL); 1503 if (ret) { 1504 mutex_unlock(&conn_id->handler_mutex); 1505 rdma_destroy_id(new_cm_id); 1506 goto out; 1507 } 1508 1509 ret = cma_acquire_dev(conn_id, listen_id); 1510 if (ret) { 1511 mutex_unlock(&conn_id->handler_mutex); 1512 rdma_destroy_id(new_cm_id); 1513 goto out; 1514 } 1515 1516 conn_id->cm_id.iw = cm_id; 1517 cm_id->context = conn_id; 1518 cm_id->cm_handler = cma_iw_handler; 1519 1520 memcpy(cma_src_addr(conn_id), laddr, rdma_addr_size(laddr)); 1521 memcpy(cma_dst_addr(conn_id), raddr, rdma_addr_size(raddr)); 1522 1523 ret = ib_query_device(conn_id->id.device, &attr); 1524 if (ret) { 1525 mutex_unlock(&conn_id->handler_mutex); 1526 rdma_destroy_id(new_cm_id); 1527 goto out; 1528 } 1529 1530 memset(&event, 0, sizeof event); 1531 event.event = RDMA_CM_EVENT_CONNECT_REQUEST; 1532 event.param.conn.private_data = iw_event->private_data; 1533 event.param.conn.private_data_len = iw_event->private_data_len; 1534 event.param.conn.initiator_depth = iw_event->ird; 1535 event.param.conn.responder_resources = iw_event->ord; 1536 1537 /* 1538 * Protect against the user destroying conn_id from another thread 1539 * until we're done accessing it. 1540 */ 1541 atomic_inc(&conn_id->refcount); 1542 ret = conn_id->id.event_handler(&conn_id->id, &event); 1543 if (ret) { 1544 /* User wants to destroy the CM ID */ 1545 conn_id->cm_id.iw = NULL; 1546 cma_exch(conn_id, RDMA_CM_DESTROYING); 1547 mutex_unlock(&conn_id->handler_mutex); 1548 cma_deref_id(conn_id); 1549 rdma_destroy_id(&conn_id->id); 1550 goto out; 1551 } 1552 1553 mutex_unlock(&conn_id->handler_mutex); 1554 cma_deref_id(conn_id); 1555 1556 out: 1557 mutex_unlock(&listen_id->handler_mutex); 1558 return ret; 1559 } 1560 1561 static int cma_ib_listen(struct rdma_id_private *id_priv) 1562 { 1563 struct ib_cm_compare_data compare_data; 1564 struct sockaddr *addr; 1565 struct ib_cm_id *id; 1566 __be64 svc_id; 1567 int ret; 1568 1569 id = ib_create_cm_id(id_priv->id.device, cma_req_handler, id_priv); 1570 if (IS_ERR(id)) 1571 return PTR_ERR(id); 1572 1573 id_priv->cm_id.ib = id; 1574 1575 addr = cma_src_addr(id_priv); 1576 svc_id = rdma_get_service_id(&id_priv->id, addr); 1577 if (cma_any_addr(addr) && !id_priv->afonly) 1578 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL); 1579 else { 1580 cma_set_compare_data(id_priv->id.ps, addr, &compare_data); 1581 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data); 1582 } 1583 1584 if (ret) { 1585 ib_destroy_cm_id(id_priv->cm_id.ib); 1586 id_priv->cm_id.ib = NULL; 1587 } 1588 1589 return ret; 1590 } 1591 1592 static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog) 1593 { 1594 int ret; 1595 struct iw_cm_id *id; 1596 1597 id = iw_create_cm_id(id_priv->id.device, 1598 iw_conn_req_handler, 1599 id_priv); 1600 if (IS_ERR(id)) 1601 return PTR_ERR(id); 1602 1603 id_priv->cm_id.iw = id; 1604 1605 memcpy(&id_priv->cm_id.iw->local_addr, cma_src_addr(id_priv), 1606 rdma_addr_size(cma_src_addr(id_priv))); 1607 1608 ret = iw_cm_listen(id_priv->cm_id.iw, backlog); 1609 1610 if (ret) { 1611 iw_destroy_cm_id(id_priv->cm_id.iw); 1612 id_priv->cm_id.iw = NULL; 1613 } 1614 1615 return ret; 1616 } 1617 1618 static int cma_listen_handler(struct rdma_cm_id *id, 1619 struct rdma_cm_event *event) 1620 { 1621 struct rdma_id_private *id_priv = id->context; 1622 1623 id->context = id_priv->id.context; 1624 id->event_handler = id_priv->id.event_handler; 1625 return id_priv->id.event_handler(id, event); 1626 } 1627 1628 static void cma_listen_on_dev(struct rdma_id_private *id_priv, 1629 struct cma_device *cma_dev) 1630 { 1631 struct rdma_id_private *dev_id_priv; 1632 struct rdma_cm_id *id; 1633 int ret; 1634 1635 if (cma_family(id_priv) == AF_IB && 1636 rdma_node_get_transport(cma_dev->device->node_type) != RDMA_TRANSPORT_IB) 1637 return; 1638 1639 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps, 1640 id_priv->id.qp_type); 1641 if (IS_ERR(id)) 1642 return; 1643 1644 dev_id_priv = container_of(id, struct rdma_id_private, id); 1645 1646 dev_id_priv->state = RDMA_CM_ADDR_BOUND; 1647 memcpy(cma_src_addr(dev_id_priv), cma_src_addr(id_priv), 1648 rdma_addr_size(cma_src_addr(id_priv))); 1649 1650 cma_attach_to_dev(dev_id_priv, cma_dev); 1651 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list); 1652 atomic_inc(&id_priv->refcount); 1653 dev_id_priv->internal_id = 1; 1654 dev_id_priv->afonly = id_priv->afonly; 1655 1656 ret = rdma_listen(id, id_priv->backlog); 1657 if (ret) 1658 printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, " 1659 "listening on device %s\n", ret, cma_dev->device->name); 1660 } 1661 1662 static void cma_listen_on_all(struct rdma_id_private *id_priv) 1663 { 1664 struct cma_device *cma_dev; 1665 1666 mutex_lock(&lock); 1667 list_add_tail(&id_priv->list, &listen_any_list); 1668 list_for_each_entry(cma_dev, &dev_list, list) 1669 cma_listen_on_dev(id_priv, cma_dev); 1670 mutex_unlock(&lock); 1671 } 1672 1673 void rdma_set_service_type(struct rdma_cm_id *id, int tos) 1674 { 1675 struct rdma_id_private *id_priv; 1676 1677 id_priv = container_of(id, struct rdma_id_private, id); 1678 id_priv->tos = (u8) tos; 1679 } 1680 EXPORT_SYMBOL(rdma_set_service_type); 1681 1682 static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec, 1683 void *context) 1684 { 1685 struct cma_work *work = context; 1686 struct rdma_route *route; 1687 1688 route = &work->id->id.route; 1689 1690 if (!status) { 1691 route->num_paths = 1; 1692 *route->path_rec = *path_rec; 1693 } else { 1694 work->old_state = RDMA_CM_ROUTE_QUERY; 1695 work->new_state = RDMA_CM_ADDR_RESOLVED; 1696 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR; 1697 work->event.status = status; 1698 } 1699 1700 queue_work(cma_wq, &work->work); 1701 } 1702 1703 static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms, 1704 struct cma_work *work) 1705 { 1706 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 1707 struct ib_sa_path_rec path_rec; 1708 ib_sa_comp_mask comp_mask; 1709 struct sockaddr_in6 *sin6; 1710 struct sockaddr_ib *sib; 1711 1712 memset(&path_rec, 0, sizeof path_rec); 1713 rdma_addr_get_sgid(dev_addr, &path_rec.sgid); 1714 rdma_addr_get_dgid(dev_addr, &path_rec.dgid); 1715 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); 1716 path_rec.numb_path = 1; 1717 path_rec.reversible = 1; 1718 path_rec.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv)); 1719 1720 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID | 1721 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH | 1722 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID; 1723 1724 switch (cma_family(id_priv)) { 1725 case AF_INET: 1726 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos); 1727 comp_mask |= IB_SA_PATH_REC_QOS_CLASS; 1728 break; 1729 case AF_INET6: 1730 sin6 = (struct sockaddr_in6 *) cma_src_addr(id_priv); 1731 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20); 1732 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS; 1733 break; 1734 case AF_IB: 1735 sib = (struct sockaddr_ib *) cma_src_addr(id_priv); 1736 path_rec.traffic_class = (u8) (be32_to_cpu(sib->sib_flowinfo) >> 20); 1737 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS; 1738 break; 1739 } 1740 1741 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device, 1742 id_priv->id.port_num, &path_rec, 1743 comp_mask, timeout_ms, 1744 GFP_KERNEL, cma_query_handler, 1745 work, &id_priv->query); 1746 1747 return (id_priv->query_id < 0) ? id_priv->query_id : 0; 1748 } 1749 1750 static void cma_work_handler(struct work_struct *_work) 1751 { 1752 struct cma_work *work = container_of(_work, struct cma_work, work); 1753 struct rdma_id_private *id_priv = work->id; 1754 int destroy = 0; 1755 1756 mutex_lock(&id_priv->handler_mutex); 1757 if (!cma_comp_exch(id_priv, work->old_state, work->new_state)) 1758 goto out; 1759 1760 if (id_priv->id.event_handler(&id_priv->id, &work->event)) { 1761 cma_exch(id_priv, RDMA_CM_DESTROYING); 1762 destroy = 1; 1763 } 1764 out: 1765 mutex_unlock(&id_priv->handler_mutex); 1766 cma_deref_id(id_priv); 1767 if (destroy) 1768 rdma_destroy_id(&id_priv->id); 1769 kfree(work); 1770 } 1771 1772 static void cma_ndev_work_handler(struct work_struct *_work) 1773 { 1774 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work); 1775 struct rdma_id_private *id_priv = work->id; 1776 int destroy = 0; 1777 1778 mutex_lock(&id_priv->handler_mutex); 1779 if (id_priv->state == RDMA_CM_DESTROYING || 1780 id_priv->state == RDMA_CM_DEVICE_REMOVAL) 1781 goto out; 1782 1783 if (id_priv->id.event_handler(&id_priv->id, &work->event)) { 1784 cma_exch(id_priv, RDMA_CM_DESTROYING); 1785 destroy = 1; 1786 } 1787 1788 out: 1789 mutex_unlock(&id_priv->handler_mutex); 1790 cma_deref_id(id_priv); 1791 if (destroy) 1792 rdma_destroy_id(&id_priv->id); 1793 kfree(work); 1794 } 1795 1796 static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms) 1797 { 1798 struct rdma_route *route = &id_priv->id.route; 1799 struct cma_work *work; 1800 int ret; 1801 1802 work = kzalloc(sizeof *work, GFP_KERNEL); 1803 if (!work) 1804 return -ENOMEM; 1805 1806 work->id = id_priv; 1807 INIT_WORK(&work->work, cma_work_handler); 1808 work->old_state = RDMA_CM_ROUTE_QUERY; 1809 work->new_state = RDMA_CM_ROUTE_RESOLVED; 1810 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 1811 1812 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL); 1813 if (!route->path_rec) { 1814 ret = -ENOMEM; 1815 goto err1; 1816 } 1817 1818 ret = cma_query_ib_route(id_priv, timeout_ms, work); 1819 if (ret) 1820 goto err2; 1821 1822 return 0; 1823 err2: 1824 kfree(route->path_rec); 1825 route->path_rec = NULL; 1826 err1: 1827 kfree(work); 1828 return ret; 1829 } 1830 1831 int rdma_set_ib_paths(struct rdma_cm_id *id, 1832 struct ib_sa_path_rec *path_rec, int num_paths) 1833 { 1834 struct rdma_id_private *id_priv; 1835 int ret; 1836 1837 id_priv = container_of(id, struct rdma_id_private, id); 1838 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, 1839 RDMA_CM_ROUTE_RESOLVED)) 1840 return -EINVAL; 1841 1842 id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths, 1843 GFP_KERNEL); 1844 if (!id->route.path_rec) { 1845 ret = -ENOMEM; 1846 goto err; 1847 } 1848 1849 id->route.num_paths = num_paths; 1850 return 0; 1851 err: 1852 cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED); 1853 return ret; 1854 } 1855 EXPORT_SYMBOL(rdma_set_ib_paths); 1856 1857 static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms) 1858 { 1859 struct cma_work *work; 1860 1861 work = kzalloc(sizeof *work, GFP_KERNEL); 1862 if (!work) 1863 return -ENOMEM; 1864 1865 work->id = id_priv; 1866 INIT_WORK(&work->work, cma_work_handler); 1867 work->old_state = RDMA_CM_ROUTE_QUERY; 1868 work->new_state = RDMA_CM_ROUTE_RESOLVED; 1869 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 1870 queue_work(cma_wq, &work->work); 1871 return 0; 1872 } 1873 1874 static int iboe_tos_to_sl(struct net_device *ndev, int tos) 1875 { 1876 int prio; 1877 struct net_device *dev; 1878 1879 prio = rt_tos2priority(tos); 1880 dev = ndev->priv_flags & IFF_802_1Q_VLAN ? 1881 vlan_dev_real_dev(ndev) : ndev; 1882 1883 if (dev->num_tc) 1884 return netdev_get_prio_tc_map(dev, prio); 1885 1886 #if IS_ENABLED(CONFIG_VLAN_8021Q) 1887 if (ndev->priv_flags & IFF_802_1Q_VLAN) 1888 return (vlan_dev_get_egress_qos_mask(ndev, prio) & 1889 VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT; 1890 #endif 1891 return 0; 1892 } 1893 1894 static int cma_resolve_iboe_route(struct rdma_id_private *id_priv) 1895 { 1896 struct rdma_route *route = &id_priv->id.route; 1897 struct rdma_addr *addr = &route->addr; 1898 struct cma_work *work; 1899 int ret; 1900 struct net_device *ndev = NULL; 1901 1902 1903 work = kzalloc(sizeof *work, GFP_KERNEL); 1904 if (!work) 1905 return -ENOMEM; 1906 1907 work->id = id_priv; 1908 INIT_WORK(&work->work, cma_work_handler); 1909 1910 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL); 1911 if (!route->path_rec) { 1912 ret = -ENOMEM; 1913 goto err1; 1914 } 1915 1916 route->num_paths = 1; 1917 1918 if (addr->dev_addr.bound_dev_if) 1919 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if); 1920 if (!ndev) { 1921 ret = -ENODEV; 1922 goto err2; 1923 } 1924 1925 route->path_rec->vlan_id = rdma_vlan_dev_vlan_id(ndev); 1926 memcpy(route->path_rec->dmac, addr->dev_addr.dst_dev_addr, ETH_ALEN); 1927 memcpy(route->path_rec->smac, ndev->dev_addr, ndev->addr_len); 1928 1929 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr, 1930 &route->path_rec->sgid); 1931 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.dst_addr, 1932 &route->path_rec->dgid); 1933 1934 route->path_rec->hop_limit = 1; 1935 route->path_rec->reversible = 1; 1936 route->path_rec->pkey = cpu_to_be16(0xffff); 1937 route->path_rec->mtu_selector = IB_SA_EQ; 1938 route->path_rec->sl = iboe_tos_to_sl(ndev, id_priv->tos); 1939 route->path_rec->mtu = iboe_get_mtu(ndev->mtu); 1940 route->path_rec->rate_selector = IB_SA_EQ; 1941 route->path_rec->rate = iboe_get_rate(ndev); 1942 dev_put(ndev); 1943 route->path_rec->packet_life_time_selector = IB_SA_EQ; 1944 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME; 1945 if (!route->path_rec->mtu) { 1946 ret = -EINVAL; 1947 goto err2; 1948 } 1949 1950 work->old_state = RDMA_CM_ROUTE_QUERY; 1951 work->new_state = RDMA_CM_ROUTE_RESOLVED; 1952 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 1953 work->event.status = 0; 1954 1955 queue_work(cma_wq, &work->work); 1956 1957 return 0; 1958 1959 err2: 1960 kfree(route->path_rec); 1961 route->path_rec = NULL; 1962 err1: 1963 kfree(work); 1964 return ret; 1965 } 1966 1967 int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms) 1968 { 1969 struct rdma_id_private *id_priv; 1970 int ret; 1971 1972 id_priv = container_of(id, struct rdma_id_private, id); 1973 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY)) 1974 return -EINVAL; 1975 1976 atomic_inc(&id_priv->refcount); 1977 switch (rdma_node_get_transport(id->device->node_type)) { 1978 case RDMA_TRANSPORT_IB: 1979 switch (rdma_port_get_link_layer(id->device, id->port_num)) { 1980 case IB_LINK_LAYER_INFINIBAND: 1981 ret = cma_resolve_ib_route(id_priv, timeout_ms); 1982 break; 1983 case IB_LINK_LAYER_ETHERNET: 1984 ret = cma_resolve_iboe_route(id_priv); 1985 break; 1986 default: 1987 ret = -ENOSYS; 1988 } 1989 break; 1990 case RDMA_TRANSPORT_IWARP: 1991 ret = cma_resolve_iw_route(id_priv, timeout_ms); 1992 break; 1993 default: 1994 ret = -ENOSYS; 1995 break; 1996 } 1997 if (ret) 1998 goto err; 1999 2000 return 0; 2001 err: 2002 cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED); 2003 cma_deref_id(id_priv); 2004 return ret; 2005 } 2006 EXPORT_SYMBOL(rdma_resolve_route); 2007 2008 static void cma_set_loopback(struct sockaddr *addr) 2009 { 2010 switch (addr->sa_family) { 2011 case AF_INET: 2012 ((struct sockaddr_in *) addr)->sin_addr.s_addr = htonl(INADDR_LOOPBACK); 2013 break; 2014 case AF_INET6: 2015 ipv6_addr_set(&((struct sockaddr_in6 *) addr)->sin6_addr, 2016 0, 0, 0, htonl(1)); 2017 break; 2018 default: 2019 ib_addr_set(&((struct sockaddr_ib *) addr)->sib_addr, 2020 0, 0, 0, htonl(1)); 2021 break; 2022 } 2023 } 2024 2025 static int cma_bind_loopback(struct rdma_id_private *id_priv) 2026 { 2027 struct cma_device *cma_dev, *cur_dev; 2028 struct ib_port_attr port_attr; 2029 union ib_gid gid; 2030 u16 pkey; 2031 int ret; 2032 u8 p; 2033 2034 cma_dev = NULL; 2035 mutex_lock(&lock); 2036 list_for_each_entry(cur_dev, &dev_list, list) { 2037 if (cma_family(id_priv) == AF_IB && 2038 rdma_node_get_transport(cur_dev->device->node_type) != RDMA_TRANSPORT_IB) 2039 continue; 2040 2041 if (!cma_dev) 2042 cma_dev = cur_dev; 2043 2044 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) { 2045 if (!ib_query_port(cur_dev->device, p, &port_attr) && 2046 port_attr.state == IB_PORT_ACTIVE) { 2047 cma_dev = cur_dev; 2048 goto port_found; 2049 } 2050 } 2051 } 2052 2053 if (!cma_dev) { 2054 ret = -ENODEV; 2055 goto out; 2056 } 2057 2058 p = 1; 2059 2060 port_found: 2061 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid); 2062 if (ret) 2063 goto out; 2064 2065 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey); 2066 if (ret) 2067 goto out; 2068 2069 id_priv->id.route.addr.dev_addr.dev_type = 2070 (rdma_port_get_link_layer(cma_dev->device, p) == IB_LINK_LAYER_INFINIBAND) ? 2071 ARPHRD_INFINIBAND : ARPHRD_ETHER; 2072 2073 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid); 2074 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey); 2075 id_priv->id.port_num = p; 2076 cma_attach_to_dev(id_priv, cma_dev); 2077 cma_set_loopback(cma_src_addr(id_priv)); 2078 out: 2079 mutex_unlock(&lock); 2080 return ret; 2081 } 2082 2083 static void addr_handler(int status, struct sockaddr *src_addr, 2084 struct rdma_dev_addr *dev_addr, void *context) 2085 { 2086 struct rdma_id_private *id_priv = context; 2087 struct rdma_cm_event event; 2088 2089 memset(&event, 0, sizeof event); 2090 mutex_lock(&id_priv->handler_mutex); 2091 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, 2092 RDMA_CM_ADDR_RESOLVED)) 2093 goto out; 2094 2095 memcpy(cma_src_addr(id_priv), src_addr, rdma_addr_size(src_addr)); 2096 if (!status && !id_priv->cma_dev) 2097 status = cma_acquire_dev(id_priv, NULL); 2098 2099 if (status) { 2100 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, 2101 RDMA_CM_ADDR_BOUND)) 2102 goto out; 2103 event.event = RDMA_CM_EVENT_ADDR_ERROR; 2104 event.status = status; 2105 } else 2106 event.event = RDMA_CM_EVENT_ADDR_RESOLVED; 2107 2108 if (id_priv->id.event_handler(&id_priv->id, &event)) { 2109 cma_exch(id_priv, RDMA_CM_DESTROYING); 2110 mutex_unlock(&id_priv->handler_mutex); 2111 cma_deref_id(id_priv); 2112 rdma_destroy_id(&id_priv->id); 2113 return; 2114 } 2115 out: 2116 mutex_unlock(&id_priv->handler_mutex); 2117 cma_deref_id(id_priv); 2118 } 2119 2120 static int cma_resolve_loopback(struct rdma_id_private *id_priv) 2121 { 2122 struct cma_work *work; 2123 union ib_gid gid; 2124 int ret; 2125 2126 work = kzalloc(sizeof *work, GFP_KERNEL); 2127 if (!work) 2128 return -ENOMEM; 2129 2130 if (!id_priv->cma_dev) { 2131 ret = cma_bind_loopback(id_priv); 2132 if (ret) 2133 goto err; 2134 } 2135 2136 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid); 2137 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid); 2138 2139 work->id = id_priv; 2140 INIT_WORK(&work->work, cma_work_handler); 2141 work->old_state = RDMA_CM_ADDR_QUERY; 2142 work->new_state = RDMA_CM_ADDR_RESOLVED; 2143 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED; 2144 queue_work(cma_wq, &work->work); 2145 return 0; 2146 err: 2147 kfree(work); 2148 return ret; 2149 } 2150 2151 static int cma_resolve_ib_addr(struct rdma_id_private *id_priv) 2152 { 2153 struct cma_work *work; 2154 int ret; 2155 2156 work = kzalloc(sizeof *work, GFP_KERNEL); 2157 if (!work) 2158 return -ENOMEM; 2159 2160 if (!id_priv->cma_dev) { 2161 ret = cma_resolve_ib_dev(id_priv); 2162 if (ret) 2163 goto err; 2164 } 2165 2166 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, (union ib_gid *) 2167 &(((struct sockaddr_ib *) &id_priv->id.route.addr.dst_addr)->sib_addr)); 2168 2169 work->id = id_priv; 2170 INIT_WORK(&work->work, cma_work_handler); 2171 work->old_state = RDMA_CM_ADDR_QUERY; 2172 work->new_state = RDMA_CM_ADDR_RESOLVED; 2173 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED; 2174 queue_work(cma_wq, &work->work); 2175 return 0; 2176 err: 2177 kfree(work); 2178 return ret; 2179 } 2180 2181 static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, 2182 struct sockaddr *dst_addr) 2183 { 2184 if (!src_addr || !src_addr->sa_family) { 2185 src_addr = (struct sockaddr *) &id->route.addr.src_addr; 2186 src_addr->sa_family = dst_addr->sa_family; 2187 if (dst_addr->sa_family == AF_INET6) { 2188 ((struct sockaddr_in6 *) src_addr)->sin6_scope_id = 2189 ((struct sockaddr_in6 *) dst_addr)->sin6_scope_id; 2190 } else if (dst_addr->sa_family == AF_IB) { 2191 ((struct sockaddr_ib *) src_addr)->sib_pkey = 2192 ((struct sockaddr_ib *) dst_addr)->sib_pkey; 2193 } 2194 } 2195 return rdma_bind_addr(id, src_addr); 2196 } 2197 2198 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, 2199 struct sockaddr *dst_addr, int timeout_ms) 2200 { 2201 struct rdma_id_private *id_priv; 2202 int ret; 2203 2204 id_priv = container_of(id, struct rdma_id_private, id); 2205 if (id_priv->state == RDMA_CM_IDLE) { 2206 ret = cma_bind_addr(id, src_addr, dst_addr); 2207 if (ret) 2208 return ret; 2209 } 2210 2211 if (cma_family(id_priv) != dst_addr->sa_family) 2212 return -EINVAL; 2213 2214 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY)) 2215 return -EINVAL; 2216 2217 atomic_inc(&id_priv->refcount); 2218 memcpy(cma_dst_addr(id_priv), dst_addr, rdma_addr_size(dst_addr)); 2219 if (cma_any_addr(dst_addr)) { 2220 ret = cma_resolve_loopback(id_priv); 2221 } else { 2222 if (dst_addr->sa_family == AF_IB) { 2223 ret = cma_resolve_ib_addr(id_priv); 2224 } else { 2225 ret = rdma_resolve_ip(&addr_client, cma_src_addr(id_priv), 2226 dst_addr, &id->route.addr.dev_addr, 2227 timeout_ms, addr_handler, id_priv); 2228 } 2229 } 2230 if (ret) 2231 goto err; 2232 2233 return 0; 2234 err: 2235 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND); 2236 cma_deref_id(id_priv); 2237 return ret; 2238 } 2239 EXPORT_SYMBOL(rdma_resolve_addr); 2240 2241 int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse) 2242 { 2243 struct rdma_id_private *id_priv; 2244 unsigned long flags; 2245 int ret; 2246 2247 id_priv = container_of(id, struct rdma_id_private, id); 2248 spin_lock_irqsave(&id_priv->lock, flags); 2249 if (reuse || id_priv->state == RDMA_CM_IDLE) { 2250 id_priv->reuseaddr = reuse; 2251 ret = 0; 2252 } else { 2253 ret = -EINVAL; 2254 } 2255 spin_unlock_irqrestore(&id_priv->lock, flags); 2256 return ret; 2257 } 2258 EXPORT_SYMBOL(rdma_set_reuseaddr); 2259 2260 int rdma_set_afonly(struct rdma_cm_id *id, int afonly) 2261 { 2262 struct rdma_id_private *id_priv; 2263 unsigned long flags; 2264 int ret; 2265 2266 id_priv = container_of(id, struct rdma_id_private, id); 2267 spin_lock_irqsave(&id_priv->lock, flags); 2268 if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) { 2269 id_priv->options |= (1 << CMA_OPTION_AFONLY); 2270 id_priv->afonly = afonly; 2271 ret = 0; 2272 } else { 2273 ret = -EINVAL; 2274 } 2275 spin_unlock_irqrestore(&id_priv->lock, flags); 2276 return ret; 2277 } 2278 EXPORT_SYMBOL(rdma_set_afonly); 2279 2280 static void cma_bind_port(struct rdma_bind_list *bind_list, 2281 struct rdma_id_private *id_priv) 2282 { 2283 struct sockaddr *addr; 2284 struct sockaddr_ib *sib; 2285 u64 sid, mask; 2286 __be16 port; 2287 2288 addr = cma_src_addr(id_priv); 2289 port = htons(bind_list->port); 2290 2291 switch (addr->sa_family) { 2292 case AF_INET: 2293 ((struct sockaddr_in *) addr)->sin_port = port; 2294 break; 2295 case AF_INET6: 2296 ((struct sockaddr_in6 *) addr)->sin6_port = port; 2297 break; 2298 case AF_IB: 2299 sib = (struct sockaddr_ib *) addr; 2300 sid = be64_to_cpu(sib->sib_sid); 2301 mask = be64_to_cpu(sib->sib_sid_mask); 2302 sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port)); 2303 sib->sib_sid_mask = cpu_to_be64(~0ULL); 2304 break; 2305 } 2306 id_priv->bind_list = bind_list; 2307 hlist_add_head(&id_priv->node, &bind_list->owners); 2308 } 2309 2310 static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv, 2311 unsigned short snum) 2312 { 2313 struct rdma_bind_list *bind_list; 2314 int ret; 2315 2316 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL); 2317 if (!bind_list) 2318 return -ENOMEM; 2319 2320 ret = idr_alloc(ps, bind_list, snum, snum + 1, GFP_KERNEL); 2321 if (ret < 0) 2322 goto err; 2323 2324 bind_list->ps = ps; 2325 bind_list->port = (unsigned short)ret; 2326 cma_bind_port(bind_list, id_priv); 2327 return 0; 2328 err: 2329 kfree(bind_list); 2330 return ret == -ENOSPC ? -EADDRNOTAVAIL : ret; 2331 } 2332 2333 static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv) 2334 { 2335 static unsigned int last_used_port; 2336 int low, high, remaining; 2337 unsigned int rover; 2338 2339 inet_get_local_port_range(&init_net, &low, &high); 2340 remaining = (high - low) + 1; 2341 rover = prandom_u32() % remaining + low; 2342 retry: 2343 if (last_used_port != rover && 2344 !idr_find(ps, (unsigned short) rover)) { 2345 int ret = cma_alloc_port(ps, id_priv, rover); 2346 /* 2347 * Remember previously used port number in order to avoid 2348 * re-using same port immediately after it is closed. 2349 */ 2350 if (!ret) 2351 last_used_port = rover; 2352 if (ret != -EADDRNOTAVAIL) 2353 return ret; 2354 } 2355 if (--remaining) { 2356 rover++; 2357 if ((rover < low) || (rover > high)) 2358 rover = low; 2359 goto retry; 2360 } 2361 return -EADDRNOTAVAIL; 2362 } 2363 2364 /* 2365 * Check that the requested port is available. This is called when trying to 2366 * bind to a specific port, or when trying to listen on a bound port. In 2367 * the latter case, the provided id_priv may already be on the bind_list, but 2368 * we still need to check that it's okay to start listening. 2369 */ 2370 static int cma_check_port(struct rdma_bind_list *bind_list, 2371 struct rdma_id_private *id_priv, uint8_t reuseaddr) 2372 { 2373 struct rdma_id_private *cur_id; 2374 struct sockaddr *addr, *cur_addr; 2375 2376 addr = cma_src_addr(id_priv); 2377 hlist_for_each_entry(cur_id, &bind_list->owners, node) { 2378 if (id_priv == cur_id) 2379 continue; 2380 2381 if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr && 2382 cur_id->reuseaddr) 2383 continue; 2384 2385 cur_addr = cma_src_addr(cur_id); 2386 if (id_priv->afonly && cur_id->afonly && 2387 (addr->sa_family != cur_addr->sa_family)) 2388 continue; 2389 2390 if (cma_any_addr(addr) || cma_any_addr(cur_addr)) 2391 return -EADDRNOTAVAIL; 2392 2393 if (!cma_addr_cmp(addr, cur_addr)) 2394 return -EADDRINUSE; 2395 } 2396 return 0; 2397 } 2398 2399 static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv) 2400 { 2401 struct rdma_bind_list *bind_list; 2402 unsigned short snum; 2403 int ret; 2404 2405 snum = ntohs(cma_port(cma_src_addr(id_priv))); 2406 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE)) 2407 return -EACCES; 2408 2409 bind_list = idr_find(ps, snum); 2410 if (!bind_list) { 2411 ret = cma_alloc_port(ps, id_priv, snum); 2412 } else { 2413 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr); 2414 if (!ret) 2415 cma_bind_port(bind_list, id_priv); 2416 } 2417 return ret; 2418 } 2419 2420 static int cma_bind_listen(struct rdma_id_private *id_priv) 2421 { 2422 struct rdma_bind_list *bind_list = id_priv->bind_list; 2423 int ret = 0; 2424 2425 mutex_lock(&lock); 2426 if (bind_list->owners.first->next) 2427 ret = cma_check_port(bind_list, id_priv, 0); 2428 mutex_unlock(&lock); 2429 return ret; 2430 } 2431 2432 static struct idr *cma_select_inet_ps(struct rdma_id_private *id_priv) 2433 { 2434 switch (id_priv->id.ps) { 2435 case RDMA_PS_TCP: 2436 return &tcp_ps; 2437 case RDMA_PS_UDP: 2438 return &udp_ps; 2439 case RDMA_PS_IPOIB: 2440 return &ipoib_ps; 2441 case RDMA_PS_IB: 2442 return &ib_ps; 2443 default: 2444 return NULL; 2445 } 2446 } 2447 2448 static struct idr *cma_select_ib_ps(struct rdma_id_private *id_priv) 2449 { 2450 struct idr *ps = NULL; 2451 struct sockaddr_ib *sib; 2452 u64 sid_ps, mask, sid; 2453 2454 sib = (struct sockaddr_ib *) cma_src_addr(id_priv); 2455 mask = be64_to_cpu(sib->sib_sid_mask) & RDMA_IB_IP_PS_MASK; 2456 sid = be64_to_cpu(sib->sib_sid) & mask; 2457 2458 if ((id_priv->id.ps == RDMA_PS_IB) && (sid == (RDMA_IB_IP_PS_IB & mask))) { 2459 sid_ps = RDMA_IB_IP_PS_IB; 2460 ps = &ib_ps; 2461 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_TCP)) && 2462 (sid == (RDMA_IB_IP_PS_TCP & mask))) { 2463 sid_ps = RDMA_IB_IP_PS_TCP; 2464 ps = &tcp_ps; 2465 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_UDP)) && 2466 (sid == (RDMA_IB_IP_PS_UDP & mask))) { 2467 sid_ps = RDMA_IB_IP_PS_UDP; 2468 ps = &udp_ps; 2469 } 2470 2471 if (ps) { 2472 sib->sib_sid = cpu_to_be64(sid_ps | ntohs(cma_port((struct sockaddr *) sib))); 2473 sib->sib_sid_mask = cpu_to_be64(RDMA_IB_IP_PS_MASK | 2474 be64_to_cpu(sib->sib_sid_mask)); 2475 } 2476 return ps; 2477 } 2478 2479 static int cma_get_port(struct rdma_id_private *id_priv) 2480 { 2481 struct idr *ps; 2482 int ret; 2483 2484 if (cma_family(id_priv) != AF_IB) 2485 ps = cma_select_inet_ps(id_priv); 2486 else 2487 ps = cma_select_ib_ps(id_priv); 2488 if (!ps) 2489 return -EPROTONOSUPPORT; 2490 2491 mutex_lock(&lock); 2492 if (cma_any_port(cma_src_addr(id_priv))) 2493 ret = cma_alloc_any_port(ps, id_priv); 2494 else 2495 ret = cma_use_port(ps, id_priv); 2496 mutex_unlock(&lock); 2497 2498 return ret; 2499 } 2500 2501 static int cma_check_linklocal(struct rdma_dev_addr *dev_addr, 2502 struct sockaddr *addr) 2503 { 2504 #if IS_ENABLED(CONFIG_IPV6) 2505 struct sockaddr_in6 *sin6; 2506 2507 if (addr->sa_family != AF_INET6) 2508 return 0; 2509 2510 sin6 = (struct sockaddr_in6 *) addr; 2511 2512 if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)) 2513 return 0; 2514 2515 if (!sin6->sin6_scope_id) 2516 return -EINVAL; 2517 2518 dev_addr->bound_dev_if = sin6->sin6_scope_id; 2519 #endif 2520 return 0; 2521 } 2522 2523 int rdma_listen(struct rdma_cm_id *id, int backlog) 2524 { 2525 struct rdma_id_private *id_priv; 2526 int ret; 2527 2528 id_priv = container_of(id, struct rdma_id_private, id); 2529 if (id_priv->state == RDMA_CM_IDLE) { 2530 id->route.addr.src_addr.ss_family = AF_INET; 2531 ret = rdma_bind_addr(id, cma_src_addr(id_priv)); 2532 if (ret) 2533 return ret; 2534 } 2535 2536 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN)) 2537 return -EINVAL; 2538 2539 if (id_priv->reuseaddr) { 2540 ret = cma_bind_listen(id_priv); 2541 if (ret) 2542 goto err; 2543 } 2544 2545 id_priv->backlog = backlog; 2546 if (id->device) { 2547 switch (rdma_node_get_transport(id->device->node_type)) { 2548 case RDMA_TRANSPORT_IB: 2549 ret = cma_ib_listen(id_priv); 2550 if (ret) 2551 goto err; 2552 break; 2553 case RDMA_TRANSPORT_IWARP: 2554 ret = cma_iw_listen(id_priv, backlog); 2555 if (ret) 2556 goto err; 2557 break; 2558 default: 2559 ret = -ENOSYS; 2560 goto err; 2561 } 2562 } else 2563 cma_listen_on_all(id_priv); 2564 2565 return 0; 2566 err: 2567 id_priv->backlog = 0; 2568 cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND); 2569 return ret; 2570 } 2571 EXPORT_SYMBOL(rdma_listen); 2572 2573 int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr) 2574 { 2575 struct rdma_id_private *id_priv; 2576 int ret; 2577 2578 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6 && 2579 addr->sa_family != AF_IB) 2580 return -EAFNOSUPPORT; 2581 2582 id_priv = container_of(id, struct rdma_id_private, id); 2583 if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND)) 2584 return -EINVAL; 2585 2586 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr); 2587 if (ret) 2588 goto err1; 2589 2590 memcpy(cma_src_addr(id_priv), addr, rdma_addr_size(addr)); 2591 if (!cma_any_addr(addr)) { 2592 ret = cma_translate_addr(addr, &id->route.addr.dev_addr); 2593 if (ret) 2594 goto err1; 2595 2596 ret = cma_acquire_dev(id_priv, NULL); 2597 if (ret) 2598 goto err1; 2599 } 2600 2601 if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) { 2602 if (addr->sa_family == AF_INET) 2603 id_priv->afonly = 1; 2604 #if IS_ENABLED(CONFIG_IPV6) 2605 else if (addr->sa_family == AF_INET6) 2606 id_priv->afonly = init_net.ipv6.sysctl.bindv6only; 2607 #endif 2608 } 2609 ret = cma_get_port(id_priv); 2610 if (ret) 2611 goto err2; 2612 2613 return 0; 2614 err2: 2615 if (id_priv->cma_dev) 2616 cma_release_dev(id_priv); 2617 err1: 2618 cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE); 2619 return ret; 2620 } 2621 EXPORT_SYMBOL(rdma_bind_addr); 2622 2623 static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv) 2624 { 2625 struct cma_hdr *cma_hdr; 2626 2627 cma_hdr = hdr; 2628 cma_hdr->cma_version = CMA_VERSION; 2629 if (cma_family(id_priv) == AF_INET) { 2630 struct sockaddr_in *src4, *dst4; 2631 2632 src4 = (struct sockaddr_in *) cma_src_addr(id_priv); 2633 dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv); 2634 2635 cma_set_ip_ver(cma_hdr, 4); 2636 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; 2637 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; 2638 cma_hdr->port = src4->sin_port; 2639 } else if (cma_family(id_priv) == AF_INET6) { 2640 struct sockaddr_in6 *src6, *dst6; 2641 2642 src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv); 2643 dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv); 2644 2645 cma_set_ip_ver(cma_hdr, 6); 2646 cma_hdr->src_addr.ip6 = src6->sin6_addr; 2647 cma_hdr->dst_addr.ip6 = dst6->sin6_addr; 2648 cma_hdr->port = src6->sin6_port; 2649 } 2650 return 0; 2651 } 2652 2653 static int cma_sidr_rep_handler(struct ib_cm_id *cm_id, 2654 struct ib_cm_event *ib_event) 2655 { 2656 struct rdma_id_private *id_priv = cm_id->context; 2657 struct rdma_cm_event event; 2658 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd; 2659 int ret = 0; 2660 2661 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT)) 2662 return 0; 2663 2664 memset(&event, 0, sizeof event); 2665 switch (ib_event->event) { 2666 case IB_CM_SIDR_REQ_ERROR: 2667 event.event = RDMA_CM_EVENT_UNREACHABLE; 2668 event.status = -ETIMEDOUT; 2669 break; 2670 case IB_CM_SIDR_REP_RECEIVED: 2671 event.param.ud.private_data = ib_event->private_data; 2672 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE; 2673 if (rep->status != IB_SIDR_SUCCESS) { 2674 event.event = RDMA_CM_EVENT_UNREACHABLE; 2675 event.status = ib_event->param.sidr_rep_rcvd.status; 2676 break; 2677 } 2678 ret = cma_set_qkey(id_priv, rep->qkey); 2679 if (ret) { 2680 event.event = RDMA_CM_EVENT_ADDR_ERROR; 2681 event.status = ret; 2682 break; 2683 } 2684 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num, 2685 id_priv->id.route.path_rec, 2686 &event.param.ud.ah_attr); 2687 event.param.ud.qp_num = rep->qpn; 2688 event.param.ud.qkey = rep->qkey; 2689 event.event = RDMA_CM_EVENT_ESTABLISHED; 2690 event.status = 0; 2691 break; 2692 default: 2693 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n", 2694 ib_event->event); 2695 goto out; 2696 } 2697 2698 ret = id_priv->id.event_handler(&id_priv->id, &event); 2699 if (ret) { 2700 /* Destroy the CM ID by returning a non-zero value. */ 2701 id_priv->cm_id.ib = NULL; 2702 cma_exch(id_priv, RDMA_CM_DESTROYING); 2703 mutex_unlock(&id_priv->handler_mutex); 2704 rdma_destroy_id(&id_priv->id); 2705 return ret; 2706 } 2707 out: 2708 mutex_unlock(&id_priv->handler_mutex); 2709 return ret; 2710 } 2711 2712 static int cma_resolve_ib_udp(struct rdma_id_private *id_priv, 2713 struct rdma_conn_param *conn_param) 2714 { 2715 struct ib_cm_sidr_req_param req; 2716 struct ib_cm_id *id; 2717 void *private_data; 2718 int offset, ret; 2719 2720 memset(&req, 0, sizeof req); 2721 offset = cma_user_data_offset(id_priv); 2722 req.private_data_len = offset + conn_param->private_data_len; 2723 if (req.private_data_len < conn_param->private_data_len) 2724 return -EINVAL; 2725 2726 if (req.private_data_len) { 2727 private_data = kzalloc(req.private_data_len, GFP_ATOMIC); 2728 if (!private_data) 2729 return -ENOMEM; 2730 } else { 2731 private_data = NULL; 2732 } 2733 2734 if (conn_param->private_data && conn_param->private_data_len) 2735 memcpy(private_data + offset, conn_param->private_data, 2736 conn_param->private_data_len); 2737 2738 if (private_data) { 2739 ret = cma_format_hdr(private_data, id_priv); 2740 if (ret) 2741 goto out; 2742 req.private_data = private_data; 2743 } 2744 2745 id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler, 2746 id_priv); 2747 if (IS_ERR(id)) { 2748 ret = PTR_ERR(id); 2749 goto out; 2750 } 2751 id_priv->cm_id.ib = id; 2752 2753 req.path = id_priv->id.route.path_rec; 2754 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv)); 2755 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8); 2756 req.max_cm_retries = CMA_MAX_CM_RETRIES; 2757 2758 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req); 2759 if (ret) { 2760 ib_destroy_cm_id(id_priv->cm_id.ib); 2761 id_priv->cm_id.ib = NULL; 2762 } 2763 out: 2764 kfree(private_data); 2765 return ret; 2766 } 2767 2768 static int cma_connect_ib(struct rdma_id_private *id_priv, 2769 struct rdma_conn_param *conn_param) 2770 { 2771 struct ib_cm_req_param req; 2772 struct rdma_route *route; 2773 void *private_data; 2774 struct ib_cm_id *id; 2775 int offset, ret; 2776 2777 memset(&req, 0, sizeof req); 2778 offset = cma_user_data_offset(id_priv); 2779 req.private_data_len = offset + conn_param->private_data_len; 2780 if (req.private_data_len < conn_param->private_data_len) 2781 return -EINVAL; 2782 2783 if (req.private_data_len) { 2784 private_data = kzalloc(req.private_data_len, GFP_ATOMIC); 2785 if (!private_data) 2786 return -ENOMEM; 2787 } else { 2788 private_data = NULL; 2789 } 2790 2791 if (conn_param->private_data && conn_param->private_data_len) 2792 memcpy(private_data + offset, conn_param->private_data, 2793 conn_param->private_data_len); 2794 2795 id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv); 2796 if (IS_ERR(id)) { 2797 ret = PTR_ERR(id); 2798 goto out; 2799 } 2800 id_priv->cm_id.ib = id; 2801 2802 route = &id_priv->id.route; 2803 if (private_data) { 2804 ret = cma_format_hdr(private_data, id_priv); 2805 if (ret) 2806 goto out; 2807 req.private_data = private_data; 2808 } 2809 2810 req.primary_path = &route->path_rec[0]; 2811 if (route->num_paths == 2) 2812 req.alternate_path = &route->path_rec[1]; 2813 2814 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv)); 2815 req.qp_num = id_priv->qp_num; 2816 req.qp_type = id_priv->id.qp_type; 2817 req.starting_psn = id_priv->seq_num; 2818 req.responder_resources = conn_param->responder_resources; 2819 req.initiator_depth = conn_param->initiator_depth; 2820 req.flow_control = conn_param->flow_control; 2821 req.retry_count = min_t(u8, 7, conn_param->retry_count); 2822 req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count); 2823 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; 2824 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; 2825 req.max_cm_retries = CMA_MAX_CM_RETRIES; 2826 req.srq = id_priv->srq ? 1 : 0; 2827 2828 ret = ib_send_cm_req(id_priv->cm_id.ib, &req); 2829 out: 2830 if (ret && !IS_ERR(id)) { 2831 ib_destroy_cm_id(id); 2832 id_priv->cm_id.ib = NULL; 2833 } 2834 2835 kfree(private_data); 2836 return ret; 2837 } 2838 2839 static int cma_connect_iw(struct rdma_id_private *id_priv, 2840 struct rdma_conn_param *conn_param) 2841 { 2842 struct iw_cm_id *cm_id; 2843 int ret; 2844 struct iw_cm_conn_param iw_param; 2845 2846 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv); 2847 if (IS_ERR(cm_id)) 2848 return PTR_ERR(cm_id); 2849 2850 id_priv->cm_id.iw = cm_id; 2851 2852 memcpy(&cm_id->local_addr, cma_src_addr(id_priv), 2853 rdma_addr_size(cma_src_addr(id_priv))); 2854 memcpy(&cm_id->remote_addr, cma_dst_addr(id_priv), 2855 rdma_addr_size(cma_dst_addr(id_priv))); 2856 2857 ret = cma_modify_qp_rtr(id_priv, conn_param); 2858 if (ret) 2859 goto out; 2860 2861 if (conn_param) { 2862 iw_param.ord = conn_param->initiator_depth; 2863 iw_param.ird = conn_param->responder_resources; 2864 iw_param.private_data = conn_param->private_data; 2865 iw_param.private_data_len = conn_param->private_data_len; 2866 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num; 2867 } else { 2868 memset(&iw_param, 0, sizeof iw_param); 2869 iw_param.qpn = id_priv->qp_num; 2870 } 2871 ret = iw_cm_connect(cm_id, &iw_param); 2872 out: 2873 if (ret) { 2874 iw_destroy_cm_id(cm_id); 2875 id_priv->cm_id.iw = NULL; 2876 } 2877 return ret; 2878 } 2879 2880 int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) 2881 { 2882 struct rdma_id_private *id_priv; 2883 int ret; 2884 2885 id_priv = container_of(id, struct rdma_id_private, id); 2886 if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT)) 2887 return -EINVAL; 2888 2889 if (!id->qp) { 2890 id_priv->qp_num = conn_param->qp_num; 2891 id_priv->srq = conn_param->srq; 2892 } 2893 2894 switch (rdma_node_get_transport(id->device->node_type)) { 2895 case RDMA_TRANSPORT_IB: 2896 if (id->qp_type == IB_QPT_UD) 2897 ret = cma_resolve_ib_udp(id_priv, conn_param); 2898 else 2899 ret = cma_connect_ib(id_priv, conn_param); 2900 break; 2901 case RDMA_TRANSPORT_IWARP: 2902 ret = cma_connect_iw(id_priv, conn_param); 2903 break; 2904 default: 2905 ret = -ENOSYS; 2906 break; 2907 } 2908 if (ret) 2909 goto err; 2910 2911 return 0; 2912 err: 2913 cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED); 2914 return ret; 2915 } 2916 EXPORT_SYMBOL(rdma_connect); 2917 2918 static int cma_accept_ib(struct rdma_id_private *id_priv, 2919 struct rdma_conn_param *conn_param) 2920 { 2921 struct ib_cm_rep_param rep; 2922 int ret; 2923 2924 ret = cma_modify_qp_rtr(id_priv, conn_param); 2925 if (ret) 2926 goto out; 2927 2928 ret = cma_modify_qp_rts(id_priv, conn_param); 2929 if (ret) 2930 goto out; 2931 2932 memset(&rep, 0, sizeof rep); 2933 rep.qp_num = id_priv->qp_num; 2934 rep.starting_psn = id_priv->seq_num; 2935 rep.private_data = conn_param->private_data; 2936 rep.private_data_len = conn_param->private_data_len; 2937 rep.responder_resources = conn_param->responder_resources; 2938 rep.initiator_depth = conn_param->initiator_depth; 2939 rep.failover_accepted = 0; 2940 rep.flow_control = conn_param->flow_control; 2941 rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count); 2942 rep.srq = id_priv->srq ? 1 : 0; 2943 2944 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep); 2945 out: 2946 return ret; 2947 } 2948 2949 static int cma_accept_iw(struct rdma_id_private *id_priv, 2950 struct rdma_conn_param *conn_param) 2951 { 2952 struct iw_cm_conn_param iw_param; 2953 int ret; 2954 2955 ret = cma_modify_qp_rtr(id_priv, conn_param); 2956 if (ret) 2957 return ret; 2958 2959 iw_param.ord = conn_param->initiator_depth; 2960 iw_param.ird = conn_param->responder_resources; 2961 iw_param.private_data = conn_param->private_data; 2962 iw_param.private_data_len = conn_param->private_data_len; 2963 if (id_priv->id.qp) { 2964 iw_param.qpn = id_priv->qp_num; 2965 } else 2966 iw_param.qpn = conn_param->qp_num; 2967 2968 return iw_cm_accept(id_priv->cm_id.iw, &iw_param); 2969 } 2970 2971 static int cma_send_sidr_rep(struct rdma_id_private *id_priv, 2972 enum ib_cm_sidr_status status, u32 qkey, 2973 const void *private_data, int private_data_len) 2974 { 2975 struct ib_cm_sidr_rep_param rep; 2976 int ret; 2977 2978 memset(&rep, 0, sizeof rep); 2979 rep.status = status; 2980 if (status == IB_SIDR_SUCCESS) { 2981 ret = cma_set_qkey(id_priv, qkey); 2982 if (ret) 2983 return ret; 2984 rep.qp_num = id_priv->qp_num; 2985 rep.qkey = id_priv->qkey; 2986 } 2987 rep.private_data = private_data; 2988 rep.private_data_len = private_data_len; 2989 2990 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep); 2991 } 2992 2993 int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) 2994 { 2995 struct rdma_id_private *id_priv; 2996 int ret; 2997 2998 id_priv = container_of(id, struct rdma_id_private, id); 2999 3000 id_priv->owner = task_pid_nr(current); 3001 3002 if (!cma_comp(id_priv, RDMA_CM_CONNECT)) 3003 return -EINVAL; 3004 3005 if (!id->qp && conn_param) { 3006 id_priv->qp_num = conn_param->qp_num; 3007 id_priv->srq = conn_param->srq; 3008 } 3009 3010 switch (rdma_node_get_transport(id->device->node_type)) { 3011 case RDMA_TRANSPORT_IB: 3012 if (id->qp_type == IB_QPT_UD) { 3013 if (conn_param) 3014 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS, 3015 conn_param->qkey, 3016 conn_param->private_data, 3017 conn_param->private_data_len); 3018 else 3019 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS, 3020 0, NULL, 0); 3021 } else { 3022 if (conn_param) 3023 ret = cma_accept_ib(id_priv, conn_param); 3024 else 3025 ret = cma_rep_recv(id_priv); 3026 } 3027 break; 3028 case RDMA_TRANSPORT_IWARP: 3029 ret = cma_accept_iw(id_priv, conn_param); 3030 break; 3031 default: 3032 ret = -ENOSYS; 3033 break; 3034 } 3035 3036 if (ret) 3037 goto reject; 3038 3039 return 0; 3040 reject: 3041 cma_modify_qp_err(id_priv); 3042 rdma_reject(id, NULL, 0); 3043 return ret; 3044 } 3045 EXPORT_SYMBOL(rdma_accept); 3046 3047 int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event) 3048 { 3049 struct rdma_id_private *id_priv; 3050 int ret; 3051 3052 id_priv = container_of(id, struct rdma_id_private, id); 3053 if (!id_priv->cm_id.ib) 3054 return -EINVAL; 3055 3056 switch (id->device->node_type) { 3057 case RDMA_NODE_IB_CA: 3058 ret = ib_cm_notify(id_priv->cm_id.ib, event); 3059 break; 3060 default: 3061 ret = 0; 3062 break; 3063 } 3064 return ret; 3065 } 3066 EXPORT_SYMBOL(rdma_notify); 3067 3068 int rdma_reject(struct rdma_cm_id *id, const void *private_data, 3069 u8 private_data_len) 3070 { 3071 struct rdma_id_private *id_priv; 3072 int ret; 3073 3074 id_priv = container_of(id, struct rdma_id_private, id); 3075 if (!id_priv->cm_id.ib) 3076 return -EINVAL; 3077 3078 switch (rdma_node_get_transport(id->device->node_type)) { 3079 case RDMA_TRANSPORT_IB: 3080 if (id->qp_type == IB_QPT_UD) 3081 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0, 3082 private_data, private_data_len); 3083 else 3084 ret = ib_send_cm_rej(id_priv->cm_id.ib, 3085 IB_CM_REJ_CONSUMER_DEFINED, NULL, 3086 0, private_data, private_data_len); 3087 break; 3088 case RDMA_TRANSPORT_IWARP: 3089 ret = iw_cm_reject(id_priv->cm_id.iw, 3090 private_data, private_data_len); 3091 break; 3092 default: 3093 ret = -ENOSYS; 3094 break; 3095 } 3096 return ret; 3097 } 3098 EXPORT_SYMBOL(rdma_reject); 3099 3100 int rdma_disconnect(struct rdma_cm_id *id) 3101 { 3102 struct rdma_id_private *id_priv; 3103 int ret; 3104 3105 id_priv = container_of(id, struct rdma_id_private, id); 3106 if (!id_priv->cm_id.ib) 3107 return -EINVAL; 3108 3109 switch (rdma_node_get_transport(id->device->node_type)) { 3110 case RDMA_TRANSPORT_IB: 3111 ret = cma_modify_qp_err(id_priv); 3112 if (ret) 3113 goto out; 3114 /* Initiate or respond to a disconnect. */ 3115 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0)) 3116 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0); 3117 break; 3118 case RDMA_TRANSPORT_IWARP: 3119 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0); 3120 break; 3121 default: 3122 ret = -EINVAL; 3123 break; 3124 } 3125 out: 3126 return ret; 3127 } 3128 EXPORT_SYMBOL(rdma_disconnect); 3129 3130 static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast) 3131 { 3132 struct rdma_id_private *id_priv; 3133 struct cma_multicast *mc = multicast->context; 3134 struct rdma_cm_event event; 3135 int ret; 3136 3137 id_priv = mc->id_priv; 3138 if (cma_disable_callback(id_priv, RDMA_CM_ADDR_BOUND) && 3139 cma_disable_callback(id_priv, RDMA_CM_ADDR_RESOLVED)) 3140 return 0; 3141 3142 if (!status) 3143 status = cma_set_qkey(id_priv, be32_to_cpu(multicast->rec.qkey)); 3144 mutex_lock(&id_priv->qp_mutex); 3145 if (!status && id_priv->id.qp) 3146 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid, 3147 be16_to_cpu(multicast->rec.mlid)); 3148 mutex_unlock(&id_priv->qp_mutex); 3149 3150 memset(&event, 0, sizeof event); 3151 event.status = status; 3152 event.param.ud.private_data = mc->context; 3153 if (!status) { 3154 event.event = RDMA_CM_EVENT_MULTICAST_JOIN; 3155 ib_init_ah_from_mcmember(id_priv->id.device, 3156 id_priv->id.port_num, &multicast->rec, 3157 &event.param.ud.ah_attr); 3158 event.param.ud.qp_num = 0xFFFFFF; 3159 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey); 3160 } else 3161 event.event = RDMA_CM_EVENT_MULTICAST_ERROR; 3162 3163 ret = id_priv->id.event_handler(&id_priv->id, &event); 3164 if (ret) { 3165 cma_exch(id_priv, RDMA_CM_DESTROYING); 3166 mutex_unlock(&id_priv->handler_mutex); 3167 rdma_destroy_id(&id_priv->id); 3168 return 0; 3169 } 3170 3171 mutex_unlock(&id_priv->handler_mutex); 3172 return 0; 3173 } 3174 3175 static void cma_set_mgid(struct rdma_id_private *id_priv, 3176 struct sockaddr *addr, union ib_gid *mgid) 3177 { 3178 unsigned char mc_map[MAX_ADDR_LEN]; 3179 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 3180 struct sockaddr_in *sin = (struct sockaddr_in *) addr; 3181 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr; 3182 3183 if (cma_any_addr(addr)) { 3184 memset(mgid, 0, sizeof *mgid); 3185 } else if ((addr->sa_family == AF_INET6) && 3186 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) == 3187 0xFF10A01B)) { 3188 /* IPv6 address is an SA assigned MGID. */ 3189 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid); 3190 } else if (addr->sa_family == AF_IB) { 3191 memcpy(mgid, &((struct sockaddr_ib *) addr)->sib_addr, sizeof *mgid); 3192 } else if ((addr->sa_family == AF_INET6)) { 3193 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map); 3194 if (id_priv->id.ps == RDMA_PS_UDP) 3195 mc_map[7] = 0x01; /* Use RDMA CM signature */ 3196 *mgid = *(union ib_gid *) (mc_map + 4); 3197 } else { 3198 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map); 3199 if (id_priv->id.ps == RDMA_PS_UDP) 3200 mc_map[7] = 0x01; /* Use RDMA CM signature */ 3201 *mgid = *(union ib_gid *) (mc_map + 4); 3202 } 3203 } 3204 3205 static int cma_join_ib_multicast(struct rdma_id_private *id_priv, 3206 struct cma_multicast *mc) 3207 { 3208 struct ib_sa_mcmember_rec rec; 3209 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 3210 ib_sa_comp_mask comp_mask; 3211 int ret; 3212 3213 ib_addr_get_mgid(dev_addr, &rec.mgid); 3214 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num, 3215 &rec.mgid, &rec); 3216 if (ret) 3217 return ret; 3218 3219 ret = cma_set_qkey(id_priv, 0); 3220 if (ret) 3221 return ret; 3222 3223 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid); 3224 rec.qkey = cpu_to_be32(id_priv->qkey); 3225 rdma_addr_get_sgid(dev_addr, &rec.port_gid); 3226 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); 3227 rec.join_state = 1; 3228 3229 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID | 3230 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE | 3231 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL | 3232 IB_SA_MCMEMBER_REC_FLOW_LABEL | 3233 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS; 3234 3235 if (id_priv->id.ps == RDMA_PS_IPOIB) 3236 comp_mask |= IB_SA_MCMEMBER_REC_RATE | 3237 IB_SA_MCMEMBER_REC_RATE_SELECTOR | 3238 IB_SA_MCMEMBER_REC_MTU_SELECTOR | 3239 IB_SA_MCMEMBER_REC_MTU | 3240 IB_SA_MCMEMBER_REC_HOP_LIMIT; 3241 3242 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device, 3243 id_priv->id.port_num, &rec, 3244 comp_mask, GFP_KERNEL, 3245 cma_ib_mc_handler, mc); 3246 return PTR_ERR_OR_ZERO(mc->multicast.ib); 3247 } 3248 3249 static void iboe_mcast_work_handler(struct work_struct *work) 3250 { 3251 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work); 3252 struct cma_multicast *mc = mw->mc; 3253 struct ib_sa_multicast *m = mc->multicast.ib; 3254 3255 mc->multicast.ib->context = mc; 3256 cma_ib_mc_handler(0, m); 3257 kref_put(&mc->mcref, release_mc); 3258 kfree(mw); 3259 } 3260 3261 static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid) 3262 { 3263 struct sockaddr_in *sin = (struct sockaddr_in *)addr; 3264 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr; 3265 3266 if (cma_any_addr(addr)) { 3267 memset(mgid, 0, sizeof *mgid); 3268 } else if (addr->sa_family == AF_INET6) { 3269 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid); 3270 } else { 3271 mgid->raw[0] = 0xff; 3272 mgid->raw[1] = 0x0e; 3273 mgid->raw[2] = 0; 3274 mgid->raw[3] = 0; 3275 mgid->raw[4] = 0; 3276 mgid->raw[5] = 0; 3277 mgid->raw[6] = 0; 3278 mgid->raw[7] = 0; 3279 mgid->raw[8] = 0; 3280 mgid->raw[9] = 0; 3281 mgid->raw[10] = 0xff; 3282 mgid->raw[11] = 0xff; 3283 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr; 3284 } 3285 } 3286 3287 static int cma_iboe_join_multicast(struct rdma_id_private *id_priv, 3288 struct cma_multicast *mc) 3289 { 3290 struct iboe_mcast_work *work; 3291 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 3292 int err; 3293 struct sockaddr *addr = (struct sockaddr *)&mc->addr; 3294 struct net_device *ndev = NULL; 3295 3296 if (cma_zero_addr((struct sockaddr *)&mc->addr)) 3297 return -EINVAL; 3298 3299 work = kzalloc(sizeof *work, GFP_KERNEL); 3300 if (!work) 3301 return -ENOMEM; 3302 3303 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL); 3304 if (!mc->multicast.ib) { 3305 err = -ENOMEM; 3306 goto out1; 3307 } 3308 3309 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid); 3310 3311 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff); 3312 if (id_priv->id.ps == RDMA_PS_UDP) 3313 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY); 3314 3315 if (dev_addr->bound_dev_if) 3316 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if); 3317 if (!ndev) { 3318 err = -ENODEV; 3319 goto out2; 3320 } 3321 mc->multicast.ib->rec.rate = iboe_get_rate(ndev); 3322 mc->multicast.ib->rec.hop_limit = 1; 3323 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu); 3324 dev_put(ndev); 3325 if (!mc->multicast.ib->rec.mtu) { 3326 err = -EINVAL; 3327 goto out2; 3328 } 3329 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr, 3330 &mc->multicast.ib->rec.port_gid); 3331 work->id = id_priv; 3332 work->mc = mc; 3333 INIT_WORK(&work->work, iboe_mcast_work_handler); 3334 kref_get(&mc->mcref); 3335 queue_work(cma_wq, &work->work); 3336 3337 return 0; 3338 3339 out2: 3340 kfree(mc->multicast.ib); 3341 out1: 3342 kfree(work); 3343 return err; 3344 } 3345 3346 int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr, 3347 void *context) 3348 { 3349 struct rdma_id_private *id_priv; 3350 struct cma_multicast *mc; 3351 int ret; 3352 3353 id_priv = container_of(id, struct rdma_id_private, id); 3354 if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) && 3355 !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED)) 3356 return -EINVAL; 3357 3358 mc = kmalloc(sizeof *mc, GFP_KERNEL); 3359 if (!mc) 3360 return -ENOMEM; 3361 3362 memcpy(&mc->addr, addr, rdma_addr_size(addr)); 3363 mc->context = context; 3364 mc->id_priv = id_priv; 3365 3366 spin_lock(&id_priv->lock); 3367 list_add(&mc->list, &id_priv->mc_list); 3368 spin_unlock(&id_priv->lock); 3369 3370 switch (rdma_node_get_transport(id->device->node_type)) { 3371 case RDMA_TRANSPORT_IB: 3372 switch (rdma_port_get_link_layer(id->device, id->port_num)) { 3373 case IB_LINK_LAYER_INFINIBAND: 3374 ret = cma_join_ib_multicast(id_priv, mc); 3375 break; 3376 case IB_LINK_LAYER_ETHERNET: 3377 kref_init(&mc->mcref); 3378 ret = cma_iboe_join_multicast(id_priv, mc); 3379 break; 3380 default: 3381 ret = -EINVAL; 3382 } 3383 break; 3384 default: 3385 ret = -ENOSYS; 3386 break; 3387 } 3388 3389 if (ret) { 3390 spin_lock_irq(&id_priv->lock); 3391 list_del(&mc->list); 3392 spin_unlock_irq(&id_priv->lock); 3393 kfree(mc); 3394 } 3395 return ret; 3396 } 3397 EXPORT_SYMBOL(rdma_join_multicast); 3398 3399 void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr) 3400 { 3401 struct rdma_id_private *id_priv; 3402 struct cma_multicast *mc; 3403 3404 id_priv = container_of(id, struct rdma_id_private, id); 3405 spin_lock_irq(&id_priv->lock); 3406 list_for_each_entry(mc, &id_priv->mc_list, list) { 3407 if (!memcmp(&mc->addr, addr, rdma_addr_size(addr))) { 3408 list_del(&mc->list); 3409 spin_unlock_irq(&id_priv->lock); 3410 3411 if (id->qp) 3412 ib_detach_mcast(id->qp, 3413 &mc->multicast.ib->rec.mgid, 3414 be16_to_cpu(mc->multicast.ib->rec.mlid)); 3415 if (rdma_node_get_transport(id_priv->cma_dev->device->node_type) == RDMA_TRANSPORT_IB) { 3416 switch (rdma_port_get_link_layer(id->device, id->port_num)) { 3417 case IB_LINK_LAYER_INFINIBAND: 3418 ib_sa_free_multicast(mc->multicast.ib); 3419 kfree(mc); 3420 break; 3421 case IB_LINK_LAYER_ETHERNET: 3422 kref_put(&mc->mcref, release_mc); 3423 break; 3424 default: 3425 break; 3426 } 3427 } 3428 return; 3429 } 3430 } 3431 spin_unlock_irq(&id_priv->lock); 3432 } 3433 EXPORT_SYMBOL(rdma_leave_multicast); 3434 3435 static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv) 3436 { 3437 struct rdma_dev_addr *dev_addr; 3438 struct cma_ndev_work *work; 3439 3440 dev_addr = &id_priv->id.route.addr.dev_addr; 3441 3442 if ((dev_addr->bound_dev_if == ndev->ifindex) && 3443 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) { 3444 printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n", 3445 ndev->name, &id_priv->id); 3446 work = kzalloc(sizeof *work, GFP_KERNEL); 3447 if (!work) 3448 return -ENOMEM; 3449 3450 INIT_WORK(&work->work, cma_ndev_work_handler); 3451 work->id = id_priv; 3452 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE; 3453 atomic_inc(&id_priv->refcount); 3454 queue_work(cma_wq, &work->work); 3455 } 3456 3457 return 0; 3458 } 3459 3460 static int cma_netdev_callback(struct notifier_block *self, unsigned long event, 3461 void *ptr) 3462 { 3463 struct net_device *ndev = netdev_notifier_info_to_dev(ptr); 3464 struct cma_device *cma_dev; 3465 struct rdma_id_private *id_priv; 3466 int ret = NOTIFY_DONE; 3467 3468 if (dev_net(ndev) != &init_net) 3469 return NOTIFY_DONE; 3470 3471 if (event != NETDEV_BONDING_FAILOVER) 3472 return NOTIFY_DONE; 3473 3474 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING)) 3475 return NOTIFY_DONE; 3476 3477 mutex_lock(&lock); 3478 list_for_each_entry(cma_dev, &dev_list, list) 3479 list_for_each_entry(id_priv, &cma_dev->id_list, list) { 3480 ret = cma_netdev_change(ndev, id_priv); 3481 if (ret) 3482 goto out; 3483 } 3484 3485 out: 3486 mutex_unlock(&lock); 3487 return ret; 3488 } 3489 3490 static struct notifier_block cma_nb = { 3491 .notifier_call = cma_netdev_callback 3492 }; 3493 3494 static void cma_add_one(struct ib_device *device) 3495 { 3496 struct cma_device *cma_dev; 3497 struct rdma_id_private *id_priv; 3498 3499 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL); 3500 if (!cma_dev) 3501 return; 3502 3503 cma_dev->device = device; 3504 3505 init_completion(&cma_dev->comp); 3506 atomic_set(&cma_dev->refcount, 1); 3507 INIT_LIST_HEAD(&cma_dev->id_list); 3508 ib_set_client_data(device, &cma_client, cma_dev); 3509 3510 mutex_lock(&lock); 3511 list_add_tail(&cma_dev->list, &dev_list); 3512 list_for_each_entry(id_priv, &listen_any_list, list) 3513 cma_listen_on_dev(id_priv, cma_dev); 3514 mutex_unlock(&lock); 3515 } 3516 3517 static int cma_remove_id_dev(struct rdma_id_private *id_priv) 3518 { 3519 struct rdma_cm_event event; 3520 enum rdma_cm_state state; 3521 int ret = 0; 3522 3523 /* Record that we want to remove the device */ 3524 state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL); 3525 if (state == RDMA_CM_DESTROYING) 3526 return 0; 3527 3528 cma_cancel_operation(id_priv, state); 3529 mutex_lock(&id_priv->handler_mutex); 3530 3531 /* Check for destruction from another callback. */ 3532 if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL)) 3533 goto out; 3534 3535 memset(&event, 0, sizeof event); 3536 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL; 3537 ret = id_priv->id.event_handler(&id_priv->id, &event); 3538 out: 3539 mutex_unlock(&id_priv->handler_mutex); 3540 return ret; 3541 } 3542 3543 static void cma_process_remove(struct cma_device *cma_dev) 3544 { 3545 struct rdma_id_private *id_priv; 3546 int ret; 3547 3548 mutex_lock(&lock); 3549 while (!list_empty(&cma_dev->id_list)) { 3550 id_priv = list_entry(cma_dev->id_list.next, 3551 struct rdma_id_private, list); 3552 3553 list_del(&id_priv->listen_list); 3554 list_del_init(&id_priv->list); 3555 atomic_inc(&id_priv->refcount); 3556 mutex_unlock(&lock); 3557 3558 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv); 3559 cma_deref_id(id_priv); 3560 if (ret) 3561 rdma_destroy_id(&id_priv->id); 3562 3563 mutex_lock(&lock); 3564 } 3565 mutex_unlock(&lock); 3566 3567 cma_deref_dev(cma_dev); 3568 wait_for_completion(&cma_dev->comp); 3569 } 3570 3571 static void cma_remove_one(struct ib_device *device) 3572 { 3573 struct cma_device *cma_dev; 3574 3575 cma_dev = ib_get_client_data(device, &cma_client); 3576 if (!cma_dev) 3577 return; 3578 3579 mutex_lock(&lock); 3580 list_del(&cma_dev->list); 3581 mutex_unlock(&lock); 3582 3583 cma_process_remove(cma_dev); 3584 kfree(cma_dev); 3585 } 3586 3587 static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb) 3588 { 3589 struct nlmsghdr *nlh; 3590 struct rdma_cm_id_stats *id_stats; 3591 struct rdma_id_private *id_priv; 3592 struct rdma_cm_id *id = NULL; 3593 struct cma_device *cma_dev; 3594 int i_dev = 0, i_id = 0; 3595 3596 /* 3597 * We export all of the IDs as a sequence of messages. Each 3598 * ID gets its own netlink message. 3599 */ 3600 mutex_lock(&lock); 3601 3602 list_for_each_entry(cma_dev, &dev_list, list) { 3603 if (i_dev < cb->args[0]) { 3604 i_dev++; 3605 continue; 3606 } 3607 3608 i_id = 0; 3609 list_for_each_entry(id_priv, &cma_dev->id_list, list) { 3610 if (i_id < cb->args[1]) { 3611 i_id++; 3612 continue; 3613 } 3614 3615 id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq, 3616 sizeof *id_stats, RDMA_NL_RDMA_CM, 3617 RDMA_NL_RDMA_CM_ID_STATS, 3618 NLM_F_MULTI); 3619 if (!id_stats) 3620 goto out; 3621 3622 memset(id_stats, 0, sizeof *id_stats); 3623 id = &id_priv->id; 3624 id_stats->node_type = id->route.addr.dev_addr.dev_type; 3625 id_stats->port_num = id->port_num; 3626 id_stats->bound_dev_if = 3627 id->route.addr.dev_addr.bound_dev_if; 3628 3629 if (ibnl_put_attr(skb, nlh, 3630 rdma_addr_size(cma_src_addr(id_priv)), 3631 cma_src_addr(id_priv), 3632 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR)) 3633 goto out; 3634 if (ibnl_put_attr(skb, nlh, 3635 rdma_addr_size(cma_src_addr(id_priv)), 3636 cma_dst_addr(id_priv), 3637 RDMA_NL_RDMA_CM_ATTR_DST_ADDR)) 3638 goto out; 3639 3640 id_stats->pid = id_priv->owner; 3641 id_stats->port_space = id->ps; 3642 id_stats->cm_state = id_priv->state; 3643 id_stats->qp_num = id_priv->qp_num; 3644 id_stats->qp_type = id->qp_type; 3645 3646 i_id++; 3647 } 3648 3649 cb->args[1] = 0; 3650 i_dev++; 3651 } 3652 3653 out: 3654 mutex_unlock(&lock); 3655 cb->args[0] = i_dev; 3656 cb->args[1] = i_id; 3657 3658 return skb->len; 3659 } 3660 3661 static const struct ibnl_client_cbs cma_cb_table[] = { 3662 [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats, 3663 .module = THIS_MODULE }, 3664 }; 3665 3666 static int __init cma_init(void) 3667 { 3668 int ret; 3669 3670 cma_wq = create_singlethread_workqueue("rdma_cm"); 3671 if (!cma_wq) 3672 return -ENOMEM; 3673 3674 ib_sa_register_client(&sa_client); 3675 rdma_addr_register_client(&addr_client); 3676 register_netdevice_notifier(&cma_nb); 3677 3678 ret = ib_register_client(&cma_client); 3679 if (ret) 3680 goto err; 3681 3682 if (ibnl_add_client(RDMA_NL_RDMA_CM, RDMA_NL_RDMA_CM_NUM_OPS, cma_cb_table)) 3683 printk(KERN_WARNING "RDMA CMA: failed to add netlink callback\n"); 3684 3685 return 0; 3686 3687 err: 3688 unregister_netdevice_notifier(&cma_nb); 3689 rdma_addr_unregister_client(&addr_client); 3690 ib_sa_unregister_client(&sa_client); 3691 destroy_workqueue(cma_wq); 3692 return ret; 3693 } 3694 3695 static void __exit cma_cleanup(void) 3696 { 3697 ibnl_remove_client(RDMA_NL_RDMA_CM); 3698 ib_unregister_client(&cma_client); 3699 unregister_netdevice_notifier(&cma_nb); 3700 rdma_addr_unregister_client(&addr_client); 3701 ib_sa_unregister_client(&sa_client); 3702 destroy_workqueue(cma_wq); 3703 idr_destroy(&tcp_ps); 3704 idr_destroy(&udp_ps); 3705 idr_destroy(&ipoib_ps); 3706 idr_destroy(&ib_ps); 3707 } 3708 3709 module_init(cma_init); 3710 module_exit(cma_cleanup); 3711