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 void cma_save_ip4_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id, 863 struct cma_hdr *hdr) 864 { 865 struct sockaddr_in *listen4, *ip4; 866 867 listen4 = (struct sockaddr_in *) &listen_id->route.addr.src_addr; 868 ip4 = (struct sockaddr_in *) &id->route.addr.src_addr; 869 ip4->sin_family = listen4->sin_family; 870 ip4->sin_addr.s_addr = hdr->dst_addr.ip4.addr; 871 ip4->sin_port = listen4->sin_port; 872 873 ip4 = (struct sockaddr_in *) &id->route.addr.dst_addr; 874 ip4->sin_family = listen4->sin_family; 875 ip4->sin_addr.s_addr = hdr->src_addr.ip4.addr; 876 ip4->sin_port = hdr->port; 877 } 878 879 static void cma_save_ip6_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id, 880 struct cma_hdr *hdr) 881 { 882 struct sockaddr_in6 *listen6, *ip6; 883 884 listen6 = (struct sockaddr_in6 *) &listen_id->route.addr.src_addr; 885 ip6 = (struct sockaddr_in6 *) &id->route.addr.src_addr; 886 ip6->sin6_family = listen6->sin6_family; 887 ip6->sin6_addr = hdr->dst_addr.ip6; 888 ip6->sin6_port = listen6->sin6_port; 889 890 ip6 = (struct sockaddr_in6 *) &id->route.addr.dst_addr; 891 ip6->sin6_family = listen6->sin6_family; 892 ip6->sin6_addr = hdr->src_addr.ip6; 893 ip6->sin6_port = hdr->port; 894 } 895 896 static int cma_save_net_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id, 897 struct ib_cm_event *ib_event) 898 { 899 struct cma_hdr *hdr; 900 901 if ((listen_id->route.addr.src_addr.ss_family == AF_IB) && 902 (ib_event->event == IB_CM_REQ_RECEIVED)) { 903 cma_save_ib_info(id, listen_id, ib_event->param.req_rcvd.primary_path); 904 return 0; 905 } 906 907 hdr = ib_event->private_data; 908 if (hdr->cma_version != CMA_VERSION) 909 return -EINVAL; 910 911 switch (cma_get_ip_ver(hdr)) { 912 case 4: 913 cma_save_ip4_info(id, listen_id, hdr); 914 break; 915 case 6: 916 cma_save_ip6_info(id, listen_id, hdr); 917 break; 918 default: 919 return -EINVAL; 920 } 921 return 0; 922 } 923 924 static inline int cma_user_data_offset(struct rdma_id_private *id_priv) 925 { 926 return cma_family(id_priv) == AF_IB ? 0 : sizeof(struct cma_hdr); 927 } 928 929 static void cma_cancel_route(struct rdma_id_private *id_priv) 930 { 931 switch (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num)) { 932 case IB_LINK_LAYER_INFINIBAND: 933 if (id_priv->query) 934 ib_sa_cancel_query(id_priv->query_id, id_priv->query); 935 break; 936 default: 937 break; 938 } 939 } 940 941 static void cma_cancel_listens(struct rdma_id_private *id_priv) 942 { 943 struct rdma_id_private *dev_id_priv; 944 945 /* 946 * Remove from listen_any_list to prevent added devices from spawning 947 * additional listen requests. 948 */ 949 mutex_lock(&lock); 950 list_del(&id_priv->list); 951 952 while (!list_empty(&id_priv->listen_list)) { 953 dev_id_priv = list_entry(id_priv->listen_list.next, 954 struct rdma_id_private, listen_list); 955 /* sync with device removal to avoid duplicate destruction */ 956 list_del_init(&dev_id_priv->list); 957 list_del(&dev_id_priv->listen_list); 958 mutex_unlock(&lock); 959 960 rdma_destroy_id(&dev_id_priv->id); 961 mutex_lock(&lock); 962 } 963 mutex_unlock(&lock); 964 } 965 966 static void cma_cancel_operation(struct rdma_id_private *id_priv, 967 enum rdma_cm_state state) 968 { 969 switch (state) { 970 case RDMA_CM_ADDR_QUERY: 971 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr); 972 break; 973 case RDMA_CM_ROUTE_QUERY: 974 cma_cancel_route(id_priv); 975 break; 976 case RDMA_CM_LISTEN: 977 if (cma_any_addr(cma_src_addr(id_priv)) && !id_priv->cma_dev) 978 cma_cancel_listens(id_priv); 979 break; 980 default: 981 break; 982 } 983 } 984 985 static void cma_release_port(struct rdma_id_private *id_priv) 986 { 987 struct rdma_bind_list *bind_list = id_priv->bind_list; 988 989 if (!bind_list) 990 return; 991 992 mutex_lock(&lock); 993 hlist_del(&id_priv->node); 994 if (hlist_empty(&bind_list->owners)) { 995 idr_remove(bind_list->ps, bind_list->port); 996 kfree(bind_list); 997 } 998 mutex_unlock(&lock); 999 } 1000 1001 static void cma_leave_mc_groups(struct rdma_id_private *id_priv) 1002 { 1003 struct cma_multicast *mc; 1004 1005 while (!list_empty(&id_priv->mc_list)) { 1006 mc = container_of(id_priv->mc_list.next, 1007 struct cma_multicast, list); 1008 list_del(&mc->list); 1009 switch (rdma_port_get_link_layer(id_priv->cma_dev->device, id_priv->id.port_num)) { 1010 case IB_LINK_LAYER_INFINIBAND: 1011 ib_sa_free_multicast(mc->multicast.ib); 1012 kfree(mc); 1013 break; 1014 case IB_LINK_LAYER_ETHERNET: 1015 kref_put(&mc->mcref, release_mc); 1016 break; 1017 default: 1018 break; 1019 } 1020 } 1021 } 1022 1023 void rdma_destroy_id(struct rdma_cm_id *id) 1024 { 1025 struct rdma_id_private *id_priv; 1026 enum rdma_cm_state state; 1027 1028 id_priv = container_of(id, struct rdma_id_private, id); 1029 state = cma_exch(id_priv, RDMA_CM_DESTROYING); 1030 cma_cancel_operation(id_priv, state); 1031 1032 /* 1033 * Wait for any active callback to finish. New callbacks will find 1034 * the id_priv state set to destroying and abort. 1035 */ 1036 mutex_lock(&id_priv->handler_mutex); 1037 mutex_unlock(&id_priv->handler_mutex); 1038 1039 if (id_priv->cma_dev) { 1040 switch (rdma_node_get_transport(id_priv->id.device->node_type)) { 1041 case RDMA_TRANSPORT_IB: 1042 if (id_priv->cm_id.ib) 1043 ib_destroy_cm_id(id_priv->cm_id.ib); 1044 break; 1045 case RDMA_TRANSPORT_IWARP: 1046 if (id_priv->cm_id.iw) 1047 iw_destroy_cm_id(id_priv->cm_id.iw); 1048 break; 1049 default: 1050 break; 1051 } 1052 cma_leave_mc_groups(id_priv); 1053 cma_release_dev(id_priv); 1054 } 1055 1056 cma_release_port(id_priv); 1057 cma_deref_id(id_priv); 1058 wait_for_completion(&id_priv->comp); 1059 1060 if (id_priv->internal_id) 1061 cma_deref_id(id_priv->id.context); 1062 1063 kfree(id_priv->id.route.path_rec); 1064 kfree(id_priv); 1065 } 1066 EXPORT_SYMBOL(rdma_destroy_id); 1067 1068 static int cma_rep_recv(struct rdma_id_private *id_priv) 1069 { 1070 int ret; 1071 1072 ret = cma_modify_qp_rtr(id_priv, NULL); 1073 if (ret) 1074 goto reject; 1075 1076 ret = cma_modify_qp_rts(id_priv, NULL); 1077 if (ret) 1078 goto reject; 1079 1080 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0); 1081 if (ret) 1082 goto reject; 1083 1084 return 0; 1085 reject: 1086 cma_modify_qp_err(id_priv); 1087 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED, 1088 NULL, 0, NULL, 0); 1089 return ret; 1090 } 1091 1092 static void cma_set_rep_event_data(struct rdma_cm_event *event, 1093 struct ib_cm_rep_event_param *rep_data, 1094 void *private_data) 1095 { 1096 event->param.conn.private_data = private_data; 1097 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE; 1098 event->param.conn.responder_resources = rep_data->responder_resources; 1099 event->param.conn.initiator_depth = rep_data->initiator_depth; 1100 event->param.conn.flow_control = rep_data->flow_control; 1101 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count; 1102 event->param.conn.srq = rep_data->srq; 1103 event->param.conn.qp_num = rep_data->remote_qpn; 1104 } 1105 1106 static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) 1107 { 1108 struct rdma_id_private *id_priv = cm_id->context; 1109 struct rdma_cm_event event; 1110 int ret = 0; 1111 1112 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT && 1113 cma_disable_callback(id_priv, RDMA_CM_CONNECT)) || 1114 (ib_event->event == IB_CM_TIMEWAIT_EXIT && 1115 cma_disable_callback(id_priv, RDMA_CM_DISCONNECT))) 1116 return 0; 1117 1118 memset(&event, 0, sizeof event); 1119 switch (ib_event->event) { 1120 case IB_CM_REQ_ERROR: 1121 case IB_CM_REP_ERROR: 1122 event.event = RDMA_CM_EVENT_UNREACHABLE; 1123 event.status = -ETIMEDOUT; 1124 break; 1125 case IB_CM_REP_RECEIVED: 1126 if (id_priv->id.qp) { 1127 event.status = cma_rep_recv(id_priv); 1128 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR : 1129 RDMA_CM_EVENT_ESTABLISHED; 1130 } else { 1131 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE; 1132 } 1133 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd, 1134 ib_event->private_data); 1135 break; 1136 case IB_CM_RTU_RECEIVED: 1137 case IB_CM_USER_ESTABLISHED: 1138 event.event = RDMA_CM_EVENT_ESTABLISHED; 1139 break; 1140 case IB_CM_DREQ_ERROR: 1141 event.status = -ETIMEDOUT; /* fall through */ 1142 case IB_CM_DREQ_RECEIVED: 1143 case IB_CM_DREP_RECEIVED: 1144 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT, 1145 RDMA_CM_DISCONNECT)) 1146 goto out; 1147 event.event = RDMA_CM_EVENT_DISCONNECTED; 1148 break; 1149 case IB_CM_TIMEWAIT_EXIT: 1150 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT; 1151 break; 1152 case IB_CM_MRA_RECEIVED: 1153 /* ignore event */ 1154 goto out; 1155 case IB_CM_REJ_RECEIVED: 1156 cma_modify_qp_err(id_priv); 1157 event.status = ib_event->param.rej_rcvd.reason; 1158 event.event = RDMA_CM_EVENT_REJECTED; 1159 event.param.conn.private_data = ib_event->private_data; 1160 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE; 1161 break; 1162 default: 1163 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n", 1164 ib_event->event); 1165 goto out; 1166 } 1167 1168 ret = id_priv->id.event_handler(&id_priv->id, &event); 1169 if (ret) { 1170 /* Destroy the CM ID by returning a non-zero value. */ 1171 id_priv->cm_id.ib = NULL; 1172 cma_exch(id_priv, RDMA_CM_DESTROYING); 1173 mutex_unlock(&id_priv->handler_mutex); 1174 rdma_destroy_id(&id_priv->id); 1175 return ret; 1176 } 1177 out: 1178 mutex_unlock(&id_priv->handler_mutex); 1179 return ret; 1180 } 1181 1182 static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id, 1183 struct ib_cm_event *ib_event) 1184 { 1185 struct rdma_id_private *id_priv; 1186 struct rdma_cm_id *id; 1187 struct rdma_route *rt; 1188 int ret; 1189 1190 id = rdma_create_id(listen_id->event_handler, listen_id->context, 1191 listen_id->ps, ib_event->param.req_rcvd.qp_type); 1192 if (IS_ERR(id)) 1193 return NULL; 1194 1195 id_priv = container_of(id, struct rdma_id_private, id); 1196 if (cma_save_net_info(id, listen_id, ib_event)) 1197 goto err; 1198 1199 rt = &id->route; 1200 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1; 1201 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths, 1202 GFP_KERNEL); 1203 if (!rt->path_rec) 1204 goto err; 1205 1206 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path; 1207 if (rt->num_paths == 2) 1208 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path; 1209 1210 if (cma_any_addr(cma_src_addr(id_priv))) { 1211 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND; 1212 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid); 1213 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey)); 1214 } else { 1215 ret = cma_translate_addr(cma_src_addr(id_priv), &rt->addr.dev_addr); 1216 if (ret) 1217 goto err; 1218 } 1219 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid); 1220 1221 id_priv->state = RDMA_CM_CONNECT; 1222 return id_priv; 1223 1224 err: 1225 rdma_destroy_id(id); 1226 return NULL; 1227 } 1228 1229 static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id, 1230 struct ib_cm_event *ib_event) 1231 { 1232 struct rdma_id_private *id_priv; 1233 struct rdma_cm_id *id; 1234 int ret; 1235 1236 id = rdma_create_id(listen_id->event_handler, listen_id->context, 1237 listen_id->ps, IB_QPT_UD); 1238 if (IS_ERR(id)) 1239 return NULL; 1240 1241 id_priv = container_of(id, struct rdma_id_private, id); 1242 if (cma_save_net_info(id, listen_id, ib_event)) 1243 goto err; 1244 1245 if (!cma_any_addr((struct sockaddr *) &id->route.addr.src_addr)) { 1246 ret = cma_translate_addr(cma_src_addr(id_priv), &id->route.addr.dev_addr); 1247 if (ret) 1248 goto err; 1249 } 1250 1251 id_priv->state = RDMA_CM_CONNECT; 1252 return id_priv; 1253 err: 1254 rdma_destroy_id(id); 1255 return NULL; 1256 } 1257 1258 static void cma_set_req_event_data(struct rdma_cm_event *event, 1259 struct ib_cm_req_event_param *req_data, 1260 void *private_data, int offset) 1261 { 1262 event->param.conn.private_data = private_data + offset; 1263 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset; 1264 event->param.conn.responder_resources = req_data->responder_resources; 1265 event->param.conn.initiator_depth = req_data->initiator_depth; 1266 event->param.conn.flow_control = req_data->flow_control; 1267 event->param.conn.retry_count = req_data->retry_count; 1268 event->param.conn.rnr_retry_count = req_data->rnr_retry_count; 1269 event->param.conn.srq = req_data->srq; 1270 event->param.conn.qp_num = req_data->remote_qpn; 1271 } 1272 1273 static int cma_check_req_qp_type(struct rdma_cm_id *id, struct ib_cm_event *ib_event) 1274 { 1275 return (((ib_event->event == IB_CM_REQ_RECEIVED) && 1276 (ib_event->param.req_rcvd.qp_type == id->qp_type)) || 1277 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) && 1278 (id->qp_type == IB_QPT_UD)) || 1279 (!id->qp_type)); 1280 } 1281 1282 static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) 1283 { 1284 struct rdma_id_private *listen_id, *conn_id; 1285 struct rdma_cm_event event; 1286 int offset, ret; 1287 u8 smac[ETH_ALEN]; 1288 u8 alt_smac[ETH_ALEN]; 1289 u8 *psmac = smac; 1290 u8 *palt_smac = alt_smac; 1291 int is_iboe = ((rdma_node_get_transport(cm_id->device->node_type) == 1292 RDMA_TRANSPORT_IB) && 1293 (rdma_port_get_link_layer(cm_id->device, 1294 ib_event->param.req_rcvd.port) == 1295 IB_LINK_LAYER_ETHERNET)); 1296 1297 listen_id = cm_id->context; 1298 if (!cma_check_req_qp_type(&listen_id->id, ib_event)) 1299 return -EINVAL; 1300 1301 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN)) 1302 return -ECONNABORTED; 1303 1304 memset(&event, 0, sizeof event); 1305 offset = cma_user_data_offset(listen_id); 1306 event.event = RDMA_CM_EVENT_CONNECT_REQUEST; 1307 if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) { 1308 conn_id = cma_new_udp_id(&listen_id->id, ib_event); 1309 event.param.ud.private_data = ib_event->private_data + offset; 1310 event.param.ud.private_data_len = 1311 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset; 1312 } else { 1313 conn_id = cma_new_conn_id(&listen_id->id, ib_event); 1314 cma_set_req_event_data(&event, &ib_event->param.req_rcvd, 1315 ib_event->private_data, offset); 1316 } 1317 if (!conn_id) { 1318 ret = -ENOMEM; 1319 goto err1; 1320 } 1321 1322 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING); 1323 ret = cma_acquire_dev(conn_id, listen_id); 1324 if (ret) 1325 goto err2; 1326 1327 conn_id->cm_id.ib = cm_id; 1328 cm_id->context = conn_id; 1329 cm_id->cm_handler = cma_ib_handler; 1330 1331 /* 1332 * Protect against the user destroying conn_id from another thread 1333 * until we're done accessing it. 1334 */ 1335 atomic_inc(&conn_id->refcount); 1336 ret = conn_id->id.event_handler(&conn_id->id, &event); 1337 if (ret) 1338 goto err3; 1339 1340 if (is_iboe) { 1341 if (ib_event->param.req_rcvd.primary_path != NULL) 1342 rdma_addr_find_smac_by_sgid( 1343 &ib_event->param.req_rcvd.primary_path->sgid, 1344 psmac, NULL); 1345 else 1346 psmac = NULL; 1347 if (ib_event->param.req_rcvd.alternate_path != NULL) 1348 rdma_addr_find_smac_by_sgid( 1349 &ib_event->param.req_rcvd.alternate_path->sgid, 1350 palt_smac, NULL); 1351 else 1352 palt_smac = NULL; 1353 } 1354 /* 1355 * Acquire mutex to prevent user executing rdma_destroy_id() 1356 * while we're accessing the cm_id. 1357 */ 1358 mutex_lock(&lock); 1359 if (is_iboe) 1360 ib_update_cm_av(cm_id, psmac, palt_smac); 1361 if (cma_comp(conn_id, RDMA_CM_CONNECT) && 1362 (conn_id->id.qp_type != IB_QPT_UD)) 1363 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0); 1364 mutex_unlock(&lock); 1365 mutex_unlock(&conn_id->handler_mutex); 1366 mutex_unlock(&listen_id->handler_mutex); 1367 cma_deref_id(conn_id); 1368 return 0; 1369 1370 err3: 1371 cma_deref_id(conn_id); 1372 /* Destroy the CM ID by returning a non-zero value. */ 1373 conn_id->cm_id.ib = NULL; 1374 err2: 1375 cma_exch(conn_id, RDMA_CM_DESTROYING); 1376 mutex_unlock(&conn_id->handler_mutex); 1377 err1: 1378 mutex_unlock(&listen_id->handler_mutex); 1379 if (conn_id) 1380 rdma_destroy_id(&conn_id->id); 1381 return ret; 1382 } 1383 1384 __be64 rdma_get_service_id(struct rdma_cm_id *id, struct sockaddr *addr) 1385 { 1386 if (addr->sa_family == AF_IB) 1387 return ((struct sockaddr_ib *) addr)->sib_sid; 1388 1389 return cpu_to_be64(((u64)id->ps << 16) + be16_to_cpu(cma_port(addr))); 1390 } 1391 EXPORT_SYMBOL(rdma_get_service_id); 1392 1393 static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr, 1394 struct ib_cm_compare_data *compare) 1395 { 1396 struct cma_hdr *cma_data, *cma_mask; 1397 __be32 ip4_addr; 1398 struct in6_addr ip6_addr; 1399 1400 memset(compare, 0, sizeof *compare); 1401 cma_data = (void *) compare->data; 1402 cma_mask = (void *) compare->mask; 1403 1404 switch (addr->sa_family) { 1405 case AF_INET: 1406 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr; 1407 cma_set_ip_ver(cma_data, 4); 1408 cma_set_ip_ver(cma_mask, 0xF); 1409 if (!cma_any_addr(addr)) { 1410 cma_data->dst_addr.ip4.addr = ip4_addr; 1411 cma_mask->dst_addr.ip4.addr = htonl(~0); 1412 } 1413 break; 1414 case AF_INET6: 1415 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr; 1416 cma_set_ip_ver(cma_data, 6); 1417 cma_set_ip_ver(cma_mask, 0xF); 1418 if (!cma_any_addr(addr)) { 1419 cma_data->dst_addr.ip6 = ip6_addr; 1420 memset(&cma_mask->dst_addr.ip6, 0xFF, 1421 sizeof cma_mask->dst_addr.ip6); 1422 } 1423 break; 1424 default: 1425 break; 1426 } 1427 } 1428 1429 static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event) 1430 { 1431 struct rdma_id_private *id_priv = iw_id->context; 1432 struct rdma_cm_event event; 1433 int ret = 0; 1434 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr; 1435 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr; 1436 1437 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT)) 1438 return 0; 1439 1440 memset(&event, 0, sizeof event); 1441 switch (iw_event->event) { 1442 case IW_CM_EVENT_CLOSE: 1443 event.event = RDMA_CM_EVENT_DISCONNECTED; 1444 break; 1445 case IW_CM_EVENT_CONNECT_REPLY: 1446 memcpy(cma_src_addr(id_priv), laddr, 1447 rdma_addr_size(laddr)); 1448 memcpy(cma_dst_addr(id_priv), raddr, 1449 rdma_addr_size(raddr)); 1450 switch (iw_event->status) { 1451 case 0: 1452 event.event = RDMA_CM_EVENT_ESTABLISHED; 1453 event.param.conn.initiator_depth = iw_event->ird; 1454 event.param.conn.responder_resources = iw_event->ord; 1455 break; 1456 case -ECONNRESET: 1457 case -ECONNREFUSED: 1458 event.event = RDMA_CM_EVENT_REJECTED; 1459 break; 1460 case -ETIMEDOUT: 1461 event.event = RDMA_CM_EVENT_UNREACHABLE; 1462 break; 1463 default: 1464 event.event = RDMA_CM_EVENT_CONNECT_ERROR; 1465 break; 1466 } 1467 break; 1468 case IW_CM_EVENT_ESTABLISHED: 1469 event.event = RDMA_CM_EVENT_ESTABLISHED; 1470 event.param.conn.initiator_depth = iw_event->ird; 1471 event.param.conn.responder_resources = iw_event->ord; 1472 break; 1473 default: 1474 BUG_ON(1); 1475 } 1476 1477 event.status = iw_event->status; 1478 event.param.conn.private_data = iw_event->private_data; 1479 event.param.conn.private_data_len = iw_event->private_data_len; 1480 ret = id_priv->id.event_handler(&id_priv->id, &event); 1481 if (ret) { 1482 /* Destroy the CM ID by returning a non-zero value. */ 1483 id_priv->cm_id.iw = NULL; 1484 cma_exch(id_priv, RDMA_CM_DESTROYING); 1485 mutex_unlock(&id_priv->handler_mutex); 1486 rdma_destroy_id(&id_priv->id); 1487 return ret; 1488 } 1489 1490 mutex_unlock(&id_priv->handler_mutex); 1491 return ret; 1492 } 1493 1494 static int iw_conn_req_handler(struct iw_cm_id *cm_id, 1495 struct iw_cm_event *iw_event) 1496 { 1497 struct rdma_cm_id *new_cm_id; 1498 struct rdma_id_private *listen_id, *conn_id; 1499 struct rdma_cm_event event; 1500 int ret; 1501 struct ib_device_attr attr; 1502 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr; 1503 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr; 1504 1505 listen_id = cm_id->context; 1506 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN)) 1507 return -ECONNABORTED; 1508 1509 /* Create a new RDMA id for the new IW CM ID */ 1510 new_cm_id = rdma_create_id(listen_id->id.event_handler, 1511 listen_id->id.context, 1512 RDMA_PS_TCP, IB_QPT_RC); 1513 if (IS_ERR(new_cm_id)) { 1514 ret = -ENOMEM; 1515 goto out; 1516 } 1517 conn_id = container_of(new_cm_id, struct rdma_id_private, id); 1518 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING); 1519 conn_id->state = RDMA_CM_CONNECT; 1520 1521 ret = rdma_translate_ip(laddr, &conn_id->id.route.addr.dev_addr, NULL); 1522 if (ret) { 1523 mutex_unlock(&conn_id->handler_mutex); 1524 rdma_destroy_id(new_cm_id); 1525 goto out; 1526 } 1527 1528 ret = cma_acquire_dev(conn_id, listen_id); 1529 if (ret) { 1530 mutex_unlock(&conn_id->handler_mutex); 1531 rdma_destroy_id(new_cm_id); 1532 goto out; 1533 } 1534 1535 conn_id->cm_id.iw = cm_id; 1536 cm_id->context = conn_id; 1537 cm_id->cm_handler = cma_iw_handler; 1538 1539 memcpy(cma_src_addr(conn_id), laddr, rdma_addr_size(laddr)); 1540 memcpy(cma_dst_addr(conn_id), raddr, rdma_addr_size(raddr)); 1541 1542 ret = ib_query_device(conn_id->id.device, &attr); 1543 if (ret) { 1544 mutex_unlock(&conn_id->handler_mutex); 1545 rdma_destroy_id(new_cm_id); 1546 goto out; 1547 } 1548 1549 memset(&event, 0, sizeof event); 1550 event.event = RDMA_CM_EVENT_CONNECT_REQUEST; 1551 event.param.conn.private_data = iw_event->private_data; 1552 event.param.conn.private_data_len = iw_event->private_data_len; 1553 event.param.conn.initiator_depth = iw_event->ird; 1554 event.param.conn.responder_resources = iw_event->ord; 1555 1556 /* 1557 * Protect against the user destroying conn_id from another thread 1558 * until we're done accessing it. 1559 */ 1560 atomic_inc(&conn_id->refcount); 1561 ret = conn_id->id.event_handler(&conn_id->id, &event); 1562 if (ret) { 1563 /* User wants to destroy the CM ID */ 1564 conn_id->cm_id.iw = NULL; 1565 cma_exch(conn_id, RDMA_CM_DESTROYING); 1566 mutex_unlock(&conn_id->handler_mutex); 1567 cma_deref_id(conn_id); 1568 rdma_destroy_id(&conn_id->id); 1569 goto out; 1570 } 1571 1572 mutex_unlock(&conn_id->handler_mutex); 1573 cma_deref_id(conn_id); 1574 1575 out: 1576 mutex_unlock(&listen_id->handler_mutex); 1577 return ret; 1578 } 1579 1580 static int cma_ib_listen(struct rdma_id_private *id_priv) 1581 { 1582 struct ib_cm_compare_data compare_data; 1583 struct sockaddr *addr; 1584 struct ib_cm_id *id; 1585 __be64 svc_id; 1586 int ret; 1587 1588 id = ib_create_cm_id(id_priv->id.device, cma_req_handler, id_priv); 1589 if (IS_ERR(id)) 1590 return PTR_ERR(id); 1591 1592 id_priv->cm_id.ib = id; 1593 1594 addr = cma_src_addr(id_priv); 1595 svc_id = rdma_get_service_id(&id_priv->id, addr); 1596 if (cma_any_addr(addr) && !id_priv->afonly) 1597 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL); 1598 else { 1599 cma_set_compare_data(id_priv->id.ps, addr, &compare_data); 1600 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data); 1601 } 1602 1603 if (ret) { 1604 ib_destroy_cm_id(id_priv->cm_id.ib); 1605 id_priv->cm_id.ib = NULL; 1606 } 1607 1608 return ret; 1609 } 1610 1611 static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog) 1612 { 1613 int ret; 1614 struct iw_cm_id *id; 1615 1616 id = iw_create_cm_id(id_priv->id.device, 1617 iw_conn_req_handler, 1618 id_priv); 1619 if (IS_ERR(id)) 1620 return PTR_ERR(id); 1621 1622 id_priv->cm_id.iw = id; 1623 1624 memcpy(&id_priv->cm_id.iw->local_addr, cma_src_addr(id_priv), 1625 rdma_addr_size(cma_src_addr(id_priv))); 1626 1627 ret = iw_cm_listen(id_priv->cm_id.iw, backlog); 1628 1629 if (ret) { 1630 iw_destroy_cm_id(id_priv->cm_id.iw); 1631 id_priv->cm_id.iw = NULL; 1632 } 1633 1634 return ret; 1635 } 1636 1637 static int cma_listen_handler(struct rdma_cm_id *id, 1638 struct rdma_cm_event *event) 1639 { 1640 struct rdma_id_private *id_priv = id->context; 1641 1642 id->context = id_priv->id.context; 1643 id->event_handler = id_priv->id.event_handler; 1644 return id_priv->id.event_handler(id, event); 1645 } 1646 1647 static void cma_listen_on_dev(struct rdma_id_private *id_priv, 1648 struct cma_device *cma_dev) 1649 { 1650 struct rdma_id_private *dev_id_priv; 1651 struct rdma_cm_id *id; 1652 int ret; 1653 1654 if (cma_family(id_priv) == AF_IB && 1655 rdma_node_get_transport(cma_dev->device->node_type) != RDMA_TRANSPORT_IB) 1656 return; 1657 1658 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps, 1659 id_priv->id.qp_type); 1660 if (IS_ERR(id)) 1661 return; 1662 1663 dev_id_priv = container_of(id, struct rdma_id_private, id); 1664 1665 dev_id_priv->state = RDMA_CM_ADDR_BOUND; 1666 memcpy(cma_src_addr(dev_id_priv), cma_src_addr(id_priv), 1667 rdma_addr_size(cma_src_addr(id_priv))); 1668 1669 cma_attach_to_dev(dev_id_priv, cma_dev); 1670 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list); 1671 atomic_inc(&id_priv->refcount); 1672 dev_id_priv->internal_id = 1; 1673 dev_id_priv->afonly = id_priv->afonly; 1674 1675 ret = rdma_listen(id, id_priv->backlog); 1676 if (ret) 1677 printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, " 1678 "listening on device %s\n", ret, cma_dev->device->name); 1679 } 1680 1681 static void cma_listen_on_all(struct rdma_id_private *id_priv) 1682 { 1683 struct cma_device *cma_dev; 1684 1685 mutex_lock(&lock); 1686 list_add_tail(&id_priv->list, &listen_any_list); 1687 list_for_each_entry(cma_dev, &dev_list, list) 1688 cma_listen_on_dev(id_priv, cma_dev); 1689 mutex_unlock(&lock); 1690 } 1691 1692 void rdma_set_service_type(struct rdma_cm_id *id, int tos) 1693 { 1694 struct rdma_id_private *id_priv; 1695 1696 id_priv = container_of(id, struct rdma_id_private, id); 1697 id_priv->tos = (u8) tos; 1698 } 1699 EXPORT_SYMBOL(rdma_set_service_type); 1700 1701 static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec, 1702 void *context) 1703 { 1704 struct cma_work *work = context; 1705 struct rdma_route *route; 1706 1707 route = &work->id->id.route; 1708 1709 if (!status) { 1710 route->num_paths = 1; 1711 *route->path_rec = *path_rec; 1712 } else { 1713 work->old_state = RDMA_CM_ROUTE_QUERY; 1714 work->new_state = RDMA_CM_ADDR_RESOLVED; 1715 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR; 1716 work->event.status = status; 1717 } 1718 1719 queue_work(cma_wq, &work->work); 1720 } 1721 1722 static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms, 1723 struct cma_work *work) 1724 { 1725 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 1726 struct ib_sa_path_rec path_rec; 1727 ib_sa_comp_mask comp_mask; 1728 struct sockaddr_in6 *sin6; 1729 struct sockaddr_ib *sib; 1730 1731 memset(&path_rec, 0, sizeof path_rec); 1732 rdma_addr_get_sgid(dev_addr, &path_rec.sgid); 1733 rdma_addr_get_dgid(dev_addr, &path_rec.dgid); 1734 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); 1735 path_rec.numb_path = 1; 1736 path_rec.reversible = 1; 1737 path_rec.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv)); 1738 1739 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID | 1740 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH | 1741 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID; 1742 1743 switch (cma_family(id_priv)) { 1744 case AF_INET: 1745 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos); 1746 comp_mask |= IB_SA_PATH_REC_QOS_CLASS; 1747 break; 1748 case AF_INET6: 1749 sin6 = (struct sockaddr_in6 *) cma_src_addr(id_priv); 1750 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20); 1751 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS; 1752 break; 1753 case AF_IB: 1754 sib = (struct sockaddr_ib *) cma_src_addr(id_priv); 1755 path_rec.traffic_class = (u8) (be32_to_cpu(sib->sib_flowinfo) >> 20); 1756 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS; 1757 break; 1758 } 1759 1760 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device, 1761 id_priv->id.port_num, &path_rec, 1762 comp_mask, timeout_ms, 1763 GFP_KERNEL, cma_query_handler, 1764 work, &id_priv->query); 1765 1766 return (id_priv->query_id < 0) ? id_priv->query_id : 0; 1767 } 1768 1769 static void cma_work_handler(struct work_struct *_work) 1770 { 1771 struct cma_work *work = container_of(_work, struct cma_work, work); 1772 struct rdma_id_private *id_priv = work->id; 1773 int destroy = 0; 1774 1775 mutex_lock(&id_priv->handler_mutex); 1776 if (!cma_comp_exch(id_priv, work->old_state, work->new_state)) 1777 goto out; 1778 1779 if (id_priv->id.event_handler(&id_priv->id, &work->event)) { 1780 cma_exch(id_priv, RDMA_CM_DESTROYING); 1781 destroy = 1; 1782 } 1783 out: 1784 mutex_unlock(&id_priv->handler_mutex); 1785 cma_deref_id(id_priv); 1786 if (destroy) 1787 rdma_destroy_id(&id_priv->id); 1788 kfree(work); 1789 } 1790 1791 static void cma_ndev_work_handler(struct work_struct *_work) 1792 { 1793 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work); 1794 struct rdma_id_private *id_priv = work->id; 1795 int destroy = 0; 1796 1797 mutex_lock(&id_priv->handler_mutex); 1798 if (id_priv->state == RDMA_CM_DESTROYING || 1799 id_priv->state == RDMA_CM_DEVICE_REMOVAL) 1800 goto out; 1801 1802 if (id_priv->id.event_handler(&id_priv->id, &work->event)) { 1803 cma_exch(id_priv, RDMA_CM_DESTROYING); 1804 destroy = 1; 1805 } 1806 1807 out: 1808 mutex_unlock(&id_priv->handler_mutex); 1809 cma_deref_id(id_priv); 1810 if (destroy) 1811 rdma_destroy_id(&id_priv->id); 1812 kfree(work); 1813 } 1814 1815 static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms) 1816 { 1817 struct rdma_route *route = &id_priv->id.route; 1818 struct cma_work *work; 1819 int ret; 1820 1821 work = kzalloc(sizeof *work, GFP_KERNEL); 1822 if (!work) 1823 return -ENOMEM; 1824 1825 work->id = id_priv; 1826 INIT_WORK(&work->work, cma_work_handler); 1827 work->old_state = RDMA_CM_ROUTE_QUERY; 1828 work->new_state = RDMA_CM_ROUTE_RESOLVED; 1829 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 1830 1831 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL); 1832 if (!route->path_rec) { 1833 ret = -ENOMEM; 1834 goto err1; 1835 } 1836 1837 ret = cma_query_ib_route(id_priv, timeout_ms, work); 1838 if (ret) 1839 goto err2; 1840 1841 return 0; 1842 err2: 1843 kfree(route->path_rec); 1844 route->path_rec = NULL; 1845 err1: 1846 kfree(work); 1847 return ret; 1848 } 1849 1850 int rdma_set_ib_paths(struct rdma_cm_id *id, 1851 struct ib_sa_path_rec *path_rec, int num_paths) 1852 { 1853 struct rdma_id_private *id_priv; 1854 int ret; 1855 1856 id_priv = container_of(id, struct rdma_id_private, id); 1857 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, 1858 RDMA_CM_ROUTE_RESOLVED)) 1859 return -EINVAL; 1860 1861 id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths, 1862 GFP_KERNEL); 1863 if (!id->route.path_rec) { 1864 ret = -ENOMEM; 1865 goto err; 1866 } 1867 1868 id->route.num_paths = num_paths; 1869 return 0; 1870 err: 1871 cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED); 1872 return ret; 1873 } 1874 EXPORT_SYMBOL(rdma_set_ib_paths); 1875 1876 static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms) 1877 { 1878 struct cma_work *work; 1879 1880 work = kzalloc(sizeof *work, GFP_KERNEL); 1881 if (!work) 1882 return -ENOMEM; 1883 1884 work->id = id_priv; 1885 INIT_WORK(&work->work, cma_work_handler); 1886 work->old_state = RDMA_CM_ROUTE_QUERY; 1887 work->new_state = RDMA_CM_ROUTE_RESOLVED; 1888 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 1889 queue_work(cma_wq, &work->work); 1890 return 0; 1891 } 1892 1893 static int iboe_tos_to_sl(struct net_device *ndev, int tos) 1894 { 1895 int prio; 1896 struct net_device *dev; 1897 1898 prio = rt_tos2priority(tos); 1899 dev = ndev->priv_flags & IFF_802_1Q_VLAN ? 1900 vlan_dev_real_dev(ndev) : ndev; 1901 1902 if (dev->num_tc) 1903 return netdev_get_prio_tc_map(dev, prio); 1904 1905 #if IS_ENABLED(CONFIG_VLAN_8021Q) 1906 if (ndev->priv_flags & IFF_802_1Q_VLAN) 1907 return (vlan_dev_get_egress_qos_mask(ndev, prio) & 1908 VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT; 1909 #endif 1910 return 0; 1911 } 1912 1913 static int cma_resolve_iboe_route(struct rdma_id_private *id_priv) 1914 { 1915 struct rdma_route *route = &id_priv->id.route; 1916 struct rdma_addr *addr = &route->addr; 1917 struct cma_work *work; 1918 int ret; 1919 struct net_device *ndev = NULL; 1920 1921 1922 work = kzalloc(sizeof *work, GFP_KERNEL); 1923 if (!work) 1924 return -ENOMEM; 1925 1926 work->id = id_priv; 1927 INIT_WORK(&work->work, cma_work_handler); 1928 1929 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL); 1930 if (!route->path_rec) { 1931 ret = -ENOMEM; 1932 goto err1; 1933 } 1934 1935 route->num_paths = 1; 1936 1937 if (addr->dev_addr.bound_dev_if) 1938 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if); 1939 if (!ndev) { 1940 ret = -ENODEV; 1941 goto err2; 1942 } 1943 1944 route->path_rec->vlan_id = rdma_vlan_dev_vlan_id(ndev); 1945 memcpy(route->path_rec->dmac, addr->dev_addr.dst_dev_addr, ETH_ALEN); 1946 memcpy(route->path_rec->smac, ndev->dev_addr, ndev->addr_len); 1947 1948 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr, 1949 &route->path_rec->sgid); 1950 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.dst_addr, 1951 &route->path_rec->dgid); 1952 1953 route->path_rec->hop_limit = 1; 1954 route->path_rec->reversible = 1; 1955 route->path_rec->pkey = cpu_to_be16(0xffff); 1956 route->path_rec->mtu_selector = IB_SA_EQ; 1957 route->path_rec->sl = iboe_tos_to_sl(ndev, id_priv->tos); 1958 route->path_rec->mtu = iboe_get_mtu(ndev->mtu); 1959 route->path_rec->rate_selector = IB_SA_EQ; 1960 route->path_rec->rate = iboe_get_rate(ndev); 1961 dev_put(ndev); 1962 route->path_rec->packet_life_time_selector = IB_SA_EQ; 1963 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME; 1964 if (!route->path_rec->mtu) { 1965 ret = -EINVAL; 1966 goto err2; 1967 } 1968 1969 work->old_state = RDMA_CM_ROUTE_QUERY; 1970 work->new_state = RDMA_CM_ROUTE_RESOLVED; 1971 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 1972 work->event.status = 0; 1973 1974 queue_work(cma_wq, &work->work); 1975 1976 return 0; 1977 1978 err2: 1979 kfree(route->path_rec); 1980 route->path_rec = NULL; 1981 err1: 1982 kfree(work); 1983 return ret; 1984 } 1985 1986 int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms) 1987 { 1988 struct rdma_id_private *id_priv; 1989 int ret; 1990 1991 id_priv = container_of(id, struct rdma_id_private, id); 1992 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY)) 1993 return -EINVAL; 1994 1995 atomic_inc(&id_priv->refcount); 1996 switch (rdma_node_get_transport(id->device->node_type)) { 1997 case RDMA_TRANSPORT_IB: 1998 switch (rdma_port_get_link_layer(id->device, id->port_num)) { 1999 case IB_LINK_LAYER_INFINIBAND: 2000 ret = cma_resolve_ib_route(id_priv, timeout_ms); 2001 break; 2002 case IB_LINK_LAYER_ETHERNET: 2003 ret = cma_resolve_iboe_route(id_priv); 2004 break; 2005 default: 2006 ret = -ENOSYS; 2007 } 2008 break; 2009 case RDMA_TRANSPORT_IWARP: 2010 ret = cma_resolve_iw_route(id_priv, timeout_ms); 2011 break; 2012 default: 2013 ret = -ENOSYS; 2014 break; 2015 } 2016 if (ret) 2017 goto err; 2018 2019 return 0; 2020 err: 2021 cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED); 2022 cma_deref_id(id_priv); 2023 return ret; 2024 } 2025 EXPORT_SYMBOL(rdma_resolve_route); 2026 2027 static void cma_set_loopback(struct sockaddr *addr) 2028 { 2029 switch (addr->sa_family) { 2030 case AF_INET: 2031 ((struct sockaddr_in *) addr)->sin_addr.s_addr = htonl(INADDR_LOOPBACK); 2032 break; 2033 case AF_INET6: 2034 ipv6_addr_set(&((struct sockaddr_in6 *) addr)->sin6_addr, 2035 0, 0, 0, htonl(1)); 2036 break; 2037 default: 2038 ib_addr_set(&((struct sockaddr_ib *) addr)->sib_addr, 2039 0, 0, 0, htonl(1)); 2040 break; 2041 } 2042 } 2043 2044 static int cma_bind_loopback(struct rdma_id_private *id_priv) 2045 { 2046 struct cma_device *cma_dev, *cur_dev; 2047 struct ib_port_attr port_attr; 2048 union ib_gid gid; 2049 u16 pkey; 2050 int ret; 2051 u8 p; 2052 2053 cma_dev = NULL; 2054 mutex_lock(&lock); 2055 list_for_each_entry(cur_dev, &dev_list, list) { 2056 if (cma_family(id_priv) == AF_IB && 2057 rdma_node_get_transport(cur_dev->device->node_type) != RDMA_TRANSPORT_IB) 2058 continue; 2059 2060 if (!cma_dev) 2061 cma_dev = cur_dev; 2062 2063 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) { 2064 if (!ib_query_port(cur_dev->device, p, &port_attr) && 2065 port_attr.state == IB_PORT_ACTIVE) { 2066 cma_dev = cur_dev; 2067 goto port_found; 2068 } 2069 } 2070 } 2071 2072 if (!cma_dev) { 2073 ret = -ENODEV; 2074 goto out; 2075 } 2076 2077 p = 1; 2078 2079 port_found: 2080 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid); 2081 if (ret) 2082 goto out; 2083 2084 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey); 2085 if (ret) 2086 goto out; 2087 2088 id_priv->id.route.addr.dev_addr.dev_type = 2089 (rdma_port_get_link_layer(cma_dev->device, p) == IB_LINK_LAYER_INFINIBAND) ? 2090 ARPHRD_INFINIBAND : ARPHRD_ETHER; 2091 2092 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid); 2093 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey); 2094 id_priv->id.port_num = p; 2095 cma_attach_to_dev(id_priv, cma_dev); 2096 cma_set_loopback(cma_src_addr(id_priv)); 2097 out: 2098 mutex_unlock(&lock); 2099 return ret; 2100 } 2101 2102 static void addr_handler(int status, struct sockaddr *src_addr, 2103 struct rdma_dev_addr *dev_addr, void *context) 2104 { 2105 struct rdma_id_private *id_priv = context; 2106 struct rdma_cm_event event; 2107 2108 memset(&event, 0, sizeof event); 2109 mutex_lock(&id_priv->handler_mutex); 2110 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, 2111 RDMA_CM_ADDR_RESOLVED)) 2112 goto out; 2113 2114 memcpy(cma_src_addr(id_priv), src_addr, rdma_addr_size(src_addr)); 2115 if (!status && !id_priv->cma_dev) 2116 status = cma_acquire_dev(id_priv, NULL); 2117 2118 if (status) { 2119 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, 2120 RDMA_CM_ADDR_BOUND)) 2121 goto out; 2122 event.event = RDMA_CM_EVENT_ADDR_ERROR; 2123 event.status = status; 2124 } else 2125 event.event = RDMA_CM_EVENT_ADDR_RESOLVED; 2126 2127 if (id_priv->id.event_handler(&id_priv->id, &event)) { 2128 cma_exch(id_priv, RDMA_CM_DESTROYING); 2129 mutex_unlock(&id_priv->handler_mutex); 2130 cma_deref_id(id_priv); 2131 rdma_destroy_id(&id_priv->id); 2132 return; 2133 } 2134 out: 2135 mutex_unlock(&id_priv->handler_mutex); 2136 cma_deref_id(id_priv); 2137 } 2138 2139 static int cma_resolve_loopback(struct rdma_id_private *id_priv) 2140 { 2141 struct cma_work *work; 2142 union ib_gid gid; 2143 int ret; 2144 2145 work = kzalloc(sizeof *work, GFP_KERNEL); 2146 if (!work) 2147 return -ENOMEM; 2148 2149 if (!id_priv->cma_dev) { 2150 ret = cma_bind_loopback(id_priv); 2151 if (ret) 2152 goto err; 2153 } 2154 2155 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid); 2156 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid); 2157 2158 work->id = id_priv; 2159 INIT_WORK(&work->work, cma_work_handler); 2160 work->old_state = RDMA_CM_ADDR_QUERY; 2161 work->new_state = RDMA_CM_ADDR_RESOLVED; 2162 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED; 2163 queue_work(cma_wq, &work->work); 2164 return 0; 2165 err: 2166 kfree(work); 2167 return ret; 2168 } 2169 2170 static int cma_resolve_ib_addr(struct rdma_id_private *id_priv) 2171 { 2172 struct cma_work *work; 2173 int ret; 2174 2175 work = kzalloc(sizeof *work, GFP_KERNEL); 2176 if (!work) 2177 return -ENOMEM; 2178 2179 if (!id_priv->cma_dev) { 2180 ret = cma_resolve_ib_dev(id_priv); 2181 if (ret) 2182 goto err; 2183 } 2184 2185 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, (union ib_gid *) 2186 &(((struct sockaddr_ib *) &id_priv->id.route.addr.dst_addr)->sib_addr)); 2187 2188 work->id = id_priv; 2189 INIT_WORK(&work->work, cma_work_handler); 2190 work->old_state = RDMA_CM_ADDR_QUERY; 2191 work->new_state = RDMA_CM_ADDR_RESOLVED; 2192 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED; 2193 queue_work(cma_wq, &work->work); 2194 return 0; 2195 err: 2196 kfree(work); 2197 return ret; 2198 } 2199 2200 static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, 2201 struct sockaddr *dst_addr) 2202 { 2203 if (!src_addr || !src_addr->sa_family) { 2204 src_addr = (struct sockaddr *) &id->route.addr.src_addr; 2205 src_addr->sa_family = dst_addr->sa_family; 2206 if (dst_addr->sa_family == AF_INET6) { 2207 ((struct sockaddr_in6 *) src_addr)->sin6_scope_id = 2208 ((struct sockaddr_in6 *) dst_addr)->sin6_scope_id; 2209 } else if (dst_addr->sa_family == AF_IB) { 2210 ((struct sockaddr_ib *) src_addr)->sib_pkey = 2211 ((struct sockaddr_ib *) dst_addr)->sib_pkey; 2212 } 2213 } 2214 return rdma_bind_addr(id, src_addr); 2215 } 2216 2217 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, 2218 struct sockaddr *dst_addr, int timeout_ms) 2219 { 2220 struct rdma_id_private *id_priv; 2221 int ret; 2222 2223 id_priv = container_of(id, struct rdma_id_private, id); 2224 if (id_priv->state == RDMA_CM_IDLE) { 2225 ret = cma_bind_addr(id, src_addr, dst_addr); 2226 if (ret) 2227 return ret; 2228 } 2229 2230 if (cma_family(id_priv) != dst_addr->sa_family) 2231 return -EINVAL; 2232 2233 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY)) 2234 return -EINVAL; 2235 2236 atomic_inc(&id_priv->refcount); 2237 memcpy(cma_dst_addr(id_priv), dst_addr, rdma_addr_size(dst_addr)); 2238 if (cma_any_addr(dst_addr)) { 2239 ret = cma_resolve_loopback(id_priv); 2240 } else { 2241 if (dst_addr->sa_family == AF_IB) { 2242 ret = cma_resolve_ib_addr(id_priv); 2243 } else { 2244 ret = rdma_resolve_ip(&addr_client, cma_src_addr(id_priv), 2245 dst_addr, &id->route.addr.dev_addr, 2246 timeout_ms, addr_handler, id_priv); 2247 } 2248 } 2249 if (ret) 2250 goto err; 2251 2252 return 0; 2253 err: 2254 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND); 2255 cma_deref_id(id_priv); 2256 return ret; 2257 } 2258 EXPORT_SYMBOL(rdma_resolve_addr); 2259 2260 int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse) 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 (reuse || id_priv->state == RDMA_CM_IDLE) { 2269 id_priv->reuseaddr = reuse; 2270 ret = 0; 2271 } else { 2272 ret = -EINVAL; 2273 } 2274 spin_unlock_irqrestore(&id_priv->lock, flags); 2275 return ret; 2276 } 2277 EXPORT_SYMBOL(rdma_set_reuseaddr); 2278 2279 int rdma_set_afonly(struct rdma_cm_id *id, int afonly) 2280 { 2281 struct rdma_id_private *id_priv; 2282 unsigned long flags; 2283 int ret; 2284 2285 id_priv = container_of(id, struct rdma_id_private, id); 2286 spin_lock_irqsave(&id_priv->lock, flags); 2287 if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) { 2288 id_priv->options |= (1 << CMA_OPTION_AFONLY); 2289 id_priv->afonly = afonly; 2290 ret = 0; 2291 } else { 2292 ret = -EINVAL; 2293 } 2294 spin_unlock_irqrestore(&id_priv->lock, flags); 2295 return ret; 2296 } 2297 EXPORT_SYMBOL(rdma_set_afonly); 2298 2299 static void cma_bind_port(struct rdma_bind_list *bind_list, 2300 struct rdma_id_private *id_priv) 2301 { 2302 struct sockaddr *addr; 2303 struct sockaddr_ib *sib; 2304 u64 sid, mask; 2305 __be16 port; 2306 2307 addr = cma_src_addr(id_priv); 2308 port = htons(bind_list->port); 2309 2310 switch (addr->sa_family) { 2311 case AF_INET: 2312 ((struct sockaddr_in *) addr)->sin_port = port; 2313 break; 2314 case AF_INET6: 2315 ((struct sockaddr_in6 *) addr)->sin6_port = port; 2316 break; 2317 case AF_IB: 2318 sib = (struct sockaddr_ib *) addr; 2319 sid = be64_to_cpu(sib->sib_sid); 2320 mask = be64_to_cpu(sib->sib_sid_mask); 2321 sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port)); 2322 sib->sib_sid_mask = cpu_to_be64(~0ULL); 2323 break; 2324 } 2325 id_priv->bind_list = bind_list; 2326 hlist_add_head(&id_priv->node, &bind_list->owners); 2327 } 2328 2329 static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv, 2330 unsigned short snum) 2331 { 2332 struct rdma_bind_list *bind_list; 2333 int ret; 2334 2335 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL); 2336 if (!bind_list) 2337 return -ENOMEM; 2338 2339 ret = idr_alloc(ps, bind_list, snum, snum + 1, GFP_KERNEL); 2340 if (ret < 0) 2341 goto err; 2342 2343 bind_list->ps = ps; 2344 bind_list->port = (unsigned short)ret; 2345 cma_bind_port(bind_list, id_priv); 2346 return 0; 2347 err: 2348 kfree(bind_list); 2349 return ret == -ENOSPC ? -EADDRNOTAVAIL : ret; 2350 } 2351 2352 static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv) 2353 { 2354 static unsigned int last_used_port; 2355 int low, high, remaining; 2356 unsigned int rover; 2357 2358 inet_get_local_port_range(&init_net, &low, &high); 2359 remaining = (high - low) + 1; 2360 rover = prandom_u32() % remaining + low; 2361 retry: 2362 if (last_used_port != rover && 2363 !idr_find(ps, (unsigned short) rover)) { 2364 int ret = cma_alloc_port(ps, id_priv, rover); 2365 /* 2366 * Remember previously used port number in order to avoid 2367 * re-using same port immediately after it is closed. 2368 */ 2369 if (!ret) 2370 last_used_port = rover; 2371 if (ret != -EADDRNOTAVAIL) 2372 return ret; 2373 } 2374 if (--remaining) { 2375 rover++; 2376 if ((rover < low) || (rover > high)) 2377 rover = low; 2378 goto retry; 2379 } 2380 return -EADDRNOTAVAIL; 2381 } 2382 2383 /* 2384 * Check that the requested port is available. This is called when trying to 2385 * bind to a specific port, or when trying to listen on a bound port. In 2386 * the latter case, the provided id_priv may already be on the bind_list, but 2387 * we still need to check that it's okay to start listening. 2388 */ 2389 static int cma_check_port(struct rdma_bind_list *bind_list, 2390 struct rdma_id_private *id_priv, uint8_t reuseaddr) 2391 { 2392 struct rdma_id_private *cur_id; 2393 struct sockaddr *addr, *cur_addr; 2394 2395 addr = cma_src_addr(id_priv); 2396 hlist_for_each_entry(cur_id, &bind_list->owners, node) { 2397 if (id_priv == cur_id) 2398 continue; 2399 2400 if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr && 2401 cur_id->reuseaddr) 2402 continue; 2403 2404 cur_addr = cma_src_addr(cur_id); 2405 if (id_priv->afonly && cur_id->afonly && 2406 (addr->sa_family != cur_addr->sa_family)) 2407 continue; 2408 2409 if (cma_any_addr(addr) || cma_any_addr(cur_addr)) 2410 return -EADDRNOTAVAIL; 2411 2412 if (!cma_addr_cmp(addr, cur_addr)) 2413 return -EADDRINUSE; 2414 } 2415 return 0; 2416 } 2417 2418 static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv) 2419 { 2420 struct rdma_bind_list *bind_list; 2421 unsigned short snum; 2422 int ret; 2423 2424 snum = ntohs(cma_port(cma_src_addr(id_priv))); 2425 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE)) 2426 return -EACCES; 2427 2428 bind_list = idr_find(ps, snum); 2429 if (!bind_list) { 2430 ret = cma_alloc_port(ps, id_priv, snum); 2431 } else { 2432 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr); 2433 if (!ret) 2434 cma_bind_port(bind_list, id_priv); 2435 } 2436 return ret; 2437 } 2438 2439 static int cma_bind_listen(struct rdma_id_private *id_priv) 2440 { 2441 struct rdma_bind_list *bind_list = id_priv->bind_list; 2442 int ret = 0; 2443 2444 mutex_lock(&lock); 2445 if (bind_list->owners.first->next) 2446 ret = cma_check_port(bind_list, id_priv, 0); 2447 mutex_unlock(&lock); 2448 return ret; 2449 } 2450 2451 static struct idr *cma_select_inet_ps(struct rdma_id_private *id_priv) 2452 { 2453 switch (id_priv->id.ps) { 2454 case RDMA_PS_TCP: 2455 return &tcp_ps; 2456 case RDMA_PS_UDP: 2457 return &udp_ps; 2458 case RDMA_PS_IPOIB: 2459 return &ipoib_ps; 2460 case RDMA_PS_IB: 2461 return &ib_ps; 2462 default: 2463 return NULL; 2464 } 2465 } 2466 2467 static struct idr *cma_select_ib_ps(struct rdma_id_private *id_priv) 2468 { 2469 struct idr *ps = NULL; 2470 struct sockaddr_ib *sib; 2471 u64 sid_ps, mask, sid; 2472 2473 sib = (struct sockaddr_ib *) cma_src_addr(id_priv); 2474 mask = be64_to_cpu(sib->sib_sid_mask) & RDMA_IB_IP_PS_MASK; 2475 sid = be64_to_cpu(sib->sib_sid) & mask; 2476 2477 if ((id_priv->id.ps == RDMA_PS_IB) && (sid == (RDMA_IB_IP_PS_IB & mask))) { 2478 sid_ps = RDMA_IB_IP_PS_IB; 2479 ps = &ib_ps; 2480 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_TCP)) && 2481 (sid == (RDMA_IB_IP_PS_TCP & mask))) { 2482 sid_ps = RDMA_IB_IP_PS_TCP; 2483 ps = &tcp_ps; 2484 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_UDP)) && 2485 (sid == (RDMA_IB_IP_PS_UDP & mask))) { 2486 sid_ps = RDMA_IB_IP_PS_UDP; 2487 ps = &udp_ps; 2488 } 2489 2490 if (ps) { 2491 sib->sib_sid = cpu_to_be64(sid_ps | ntohs(cma_port((struct sockaddr *) sib))); 2492 sib->sib_sid_mask = cpu_to_be64(RDMA_IB_IP_PS_MASK | 2493 be64_to_cpu(sib->sib_sid_mask)); 2494 } 2495 return ps; 2496 } 2497 2498 static int cma_get_port(struct rdma_id_private *id_priv) 2499 { 2500 struct idr *ps; 2501 int ret; 2502 2503 if (cma_family(id_priv) != AF_IB) 2504 ps = cma_select_inet_ps(id_priv); 2505 else 2506 ps = cma_select_ib_ps(id_priv); 2507 if (!ps) 2508 return -EPROTONOSUPPORT; 2509 2510 mutex_lock(&lock); 2511 if (cma_any_port(cma_src_addr(id_priv))) 2512 ret = cma_alloc_any_port(ps, id_priv); 2513 else 2514 ret = cma_use_port(ps, id_priv); 2515 mutex_unlock(&lock); 2516 2517 return ret; 2518 } 2519 2520 static int cma_check_linklocal(struct rdma_dev_addr *dev_addr, 2521 struct sockaddr *addr) 2522 { 2523 #if IS_ENABLED(CONFIG_IPV6) 2524 struct sockaddr_in6 *sin6; 2525 2526 if (addr->sa_family != AF_INET6) 2527 return 0; 2528 2529 sin6 = (struct sockaddr_in6 *) addr; 2530 2531 if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)) 2532 return 0; 2533 2534 if (!sin6->sin6_scope_id) 2535 return -EINVAL; 2536 2537 dev_addr->bound_dev_if = sin6->sin6_scope_id; 2538 #endif 2539 return 0; 2540 } 2541 2542 int rdma_listen(struct rdma_cm_id *id, int backlog) 2543 { 2544 struct rdma_id_private *id_priv; 2545 int ret; 2546 2547 id_priv = container_of(id, struct rdma_id_private, id); 2548 if (id_priv->state == RDMA_CM_IDLE) { 2549 id->route.addr.src_addr.ss_family = AF_INET; 2550 ret = rdma_bind_addr(id, cma_src_addr(id_priv)); 2551 if (ret) 2552 return ret; 2553 } 2554 2555 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN)) 2556 return -EINVAL; 2557 2558 if (id_priv->reuseaddr) { 2559 ret = cma_bind_listen(id_priv); 2560 if (ret) 2561 goto err; 2562 } 2563 2564 id_priv->backlog = backlog; 2565 if (id->device) { 2566 switch (rdma_node_get_transport(id->device->node_type)) { 2567 case RDMA_TRANSPORT_IB: 2568 ret = cma_ib_listen(id_priv); 2569 if (ret) 2570 goto err; 2571 break; 2572 case RDMA_TRANSPORT_IWARP: 2573 ret = cma_iw_listen(id_priv, backlog); 2574 if (ret) 2575 goto err; 2576 break; 2577 default: 2578 ret = -ENOSYS; 2579 goto err; 2580 } 2581 } else 2582 cma_listen_on_all(id_priv); 2583 2584 return 0; 2585 err: 2586 id_priv->backlog = 0; 2587 cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND); 2588 return ret; 2589 } 2590 EXPORT_SYMBOL(rdma_listen); 2591 2592 int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr) 2593 { 2594 struct rdma_id_private *id_priv; 2595 int ret; 2596 2597 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6 && 2598 addr->sa_family != AF_IB) 2599 return -EAFNOSUPPORT; 2600 2601 id_priv = container_of(id, struct rdma_id_private, id); 2602 if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND)) 2603 return -EINVAL; 2604 2605 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr); 2606 if (ret) 2607 goto err1; 2608 2609 memcpy(cma_src_addr(id_priv), addr, rdma_addr_size(addr)); 2610 if (!cma_any_addr(addr)) { 2611 ret = cma_translate_addr(addr, &id->route.addr.dev_addr); 2612 if (ret) 2613 goto err1; 2614 2615 ret = cma_acquire_dev(id_priv, NULL); 2616 if (ret) 2617 goto err1; 2618 } 2619 2620 if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) { 2621 if (addr->sa_family == AF_INET) 2622 id_priv->afonly = 1; 2623 #if IS_ENABLED(CONFIG_IPV6) 2624 else if (addr->sa_family == AF_INET6) 2625 id_priv->afonly = init_net.ipv6.sysctl.bindv6only; 2626 #endif 2627 } 2628 ret = cma_get_port(id_priv); 2629 if (ret) 2630 goto err2; 2631 2632 return 0; 2633 err2: 2634 if (id_priv->cma_dev) 2635 cma_release_dev(id_priv); 2636 err1: 2637 cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE); 2638 return ret; 2639 } 2640 EXPORT_SYMBOL(rdma_bind_addr); 2641 2642 static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv) 2643 { 2644 struct cma_hdr *cma_hdr; 2645 2646 cma_hdr = hdr; 2647 cma_hdr->cma_version = CMA_VERSION; 2648 if (cma_family(id_priv) == AF_INET) { 2649 struct sockaddr_in *src4, *dst4; 2650 2651 src4 = (struct sockaddr_in *) cma_src_addr(id_priv); 2652 dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv); 2653 2654 cma_set_ip_ver(cma_hdr, 4); 2655 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; 2656 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; 2657 cma_hdr->port = src4->sin_port; 2658 } else if (cma_family(id_priv) == AF_INET6) { 2659 struct sockaddr_in6 *src6, *dst6; 2660 2661 src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv); 2662 dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv); 2663 2664 cma_set_ip_ver(cma_hdr, 6); 2665 cma_hdr->src_addr.ip6 = src6->sin6_addr; 2666 cma_hdr->dst_addr.ip6 = dst6->sin6_addr; 2667 cma_hdr->port = src6->sin6_port; 2668 } 2669 return 0; 2670 } 2671 2672 static int cma_sidr_rep_handler(struct ib_cm_id *cm_id, 2673 struct ib_cm_event *ib_event) 2674 { 2675 struct rdma_id_private *id_priv = cm_id->context; 2676 struct rdma_cm_event event; 2677 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd; 2678 int ret = 0; 2679 2680 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT)) 2681 return 0; 2682 2683 memset(&event, 0, sizeof event); 2684 switch (ib_event->event) { 2685 case IB_CM_SIDR_REQ_ERROR: 2686 event.event = RDMA_CM_EVENT_UNREACHABLE; 2687 event.status = -ETIMEDOUT; 2688 break; 2689 case IB_CM_SIDR_REP_RECEIVED: 2690 event.param.ud.private_data = ib_event->private_data; 2691 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE; 2692 if (rep->status != IB_SIDR_SUCCESS) { 2693 event.event = RDMA_CM_EVENT_UNREACHABLE; 2694 event.status = ib_event->param.sidr_rep_rcvd.status; 2695 break; 2696 } 2697 ret = cma_set_qkey(id_priv, rep->qkey); 2698 if (ret) { 2699 event.event = RDMA_CM_EVENT_ADDR_ERROR; 2700 event.status = ret; 2701 break; 2702 } 2703 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num, 2704 id_priv->id.route.path_rec, 2705 &event.param.ud.ah_attr); 2706 event.param.ud.qp_num = rep->qpn; 2707 event.param.ud.qkey = rep->qkey; 2708 event.event = RDMA_CM_EVENT_ESTABLISHED; 2709 event.status = 0; 2710 break; 2711 default: 2712 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n", 2713 ib_event->event); 2714 goto out; 2715 } 2716 2717 ret = id_priv->id.event_handler(&id_priv->id, &event); 2718 if (ret) { 2719 /* Destroy the CM ID by returning a non-zero value. */ 2720 id_priv->cm_id.ib = NULL; 2721 cma_exch(id_priv, RDMA_CM_DESTROYING); 2722 mutex_unlock(&id_priv->handler_mutex); 2723 rdma_destroy_id(&id_priv->id); 2724 return ret; 2725 } 2726 out: 2727 mutex_unlock(&id_priv->handler_mutex); 2728 return ret; 2729 } 2730 2731 static int cma_resolve_ib_udp(struct rdma_id_private *id_priv, 2732 struct rdma_conn_param *conn_param) 2733 { 2734 struct ib_cm_sidr_req_param req; 2735 struct ib_cm_id *id; 2736 void *private_data; 2737 int offset, ret; 2738 2739 memset(&req, 0, sizeof req); 2740 offset = cma_user_data_offset(id_priv); 2741 req.private_data_len = offset + conn_param->private_data_len; 2742 if (req.private_data_len < conn_param->private_data_len) 2743 return -EINVAL; 2744 2745 if (req.private_data_len) { 2746 private_data = kzalloc(req.private_data_len, GFP_ATOMIC); 2747 if (!private_data) 2748 return -ENOMEM; 2749 } else { 2750 private_data = NULL; 2751 } 2752 2753 if (conn_param->private_data && conn_param->private_data_len) 2754 memcpy(private_data + offset, conn_param->private_data, 2755 conn_param->private_data_len); 2756 2757 if (private_data) { 2758 ret = cma_format_hdr(private_data, id_priv); 2759 if (ret) 2760 goto out; 2761 req.private_data = private_data; 2762 } 2763 2764 id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler, 2765 id_priv); 2766 if (IS_ERR(id)) { 2767 ret = PTR_ERR(id); 2768 goto out; 2769 } 2770 id_priv->cm_id.ib = id; 2771 2772 req.path = id_priv->id.route.path_rec; 2773 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv)); 2774 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8); 2775 req.max_cm_retries = CMA_MAX_CM_RETRIES; 2776 2777 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req); 2778 if (ret) { 2779 ib_destroy_cm_id(id_priv->cm_id.ib); 2780 id_priv->cm_id.ib = NULL; 2781 } 2782 out: 2783 kfree(private_data); 2784 return ret; 2785 } 2786 2787 static int cma_connect_ib(struct rdma_id_private *id_priv, 2788 struct rdma_conn_param *conn_param) 2789 { 2790 struct ib_cm_req_param req; 2791 struct rdma_route *route; 2792 void *private_data; 2793 struct ib_cm_id *id; 2794 int offset, ret; 2795 2796 memset(&req, 0, sizeof req); 2797 offset = cma_user_data_offset(id_priv); 2798 req.private_data_len = offset + conn_param->private_data_len; 2799 if (req.private_data_len < conn_param->private_data_len) 2800 return -EINVAL; 2801 2802 if (req.private_data_len) { 2803 private_data = kzalloc(req.private_data_len, GFP_ATOMIC); 2804 if (!private_data) 2805 return -ENOMEM; 2806 } else { 2807 private_data = NULL; 2808 } 2809 2810 if (conn_param->private_data && conn_param->private_data_len) 2811 memcpy(private_data + offset, conn_param->private_data, 2812 conn_param->private_data_len); 2813 2814 id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv); 2815 if (IS_ERR(id)) { 2816 ret = PTR_ERR(id); 2817 goto out; 2818 } 2819 id_priv->cm_id.ib = id; 2820 2821 route = &id_priv->id.route; 2822 if (private_data) { 2823 ret = cma_format_hdr(private_data, id_priv); 2824 if (ret) 2825 goto out; 2826 req.private_data = private_data; 2827 } 2828 2829 req.primary_path = &route->path_rec[0]; 2830 if (route->num_paths == 2) 2831 req.alternate_path = &route->path_rec[1]; 2832 2833 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv)); 2834 req.qp_num = id_priv->qp_num; 2835 req.qp_type = id_priv->id.qp_type; 2836 req.starting_psn = id_priv->seq_num; 2837 req.responder_resources = conn_param->responder_resources; 2838 req.initiator_depth = conn_param->initiator_depth; 2839 req.flow_control = conn_param->flow_control; 2840 req.retry_count = min_t(u8, 7, conn_param->retry_count); 2841 req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count); 2842 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; 2843 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; 2844 req.max_cm_retries = CMA_MAX_CM_RETRIES; 2845 req.srq = id_priv->srq ? 1 : 0; 2846 2847 ret = ib_send_cm_req(id_priv->cm_id.ib, &req); 2848 out: 2849 if (ret && !IS_ERR(id)) { 2850 ib_destroy_cm_id(id); 2851 id_priv->cm_id.ib = NULL; 2852 } 2853 2854 kfree(private_data); 2855 return ret; 2856 } 2857 2858 static int cma_connect_iw(struct rdma_id_private *id_priv, 2859 struct rdma_conn_param *conn_param) 2860 { 2861 struct iw_cm_id *cm_id; 2862 int ret; 2863 struct iw_cm_conn_param iw_param; 2864 2865 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv); 2866 if (IS_ERR(cm_id)) 2867 return PTR_ERR(cm_id); 2868 2869 id_priv->cm_id.iw = cm_id; 2870 2871 memcpy(&cm_id->local_addr, cma_src_addr(id_priv), 2872 rdma_addr_size(cma_src_addr(id_priv))); 2873 memcpy(&cm_id->remote_addr, cma_dst_addr(id_priv), 2874 rdma_addr_size(cma_dst_addr(id_priv))); 2875 2876 ret = cma_modify_qp_rtr(id_priv, conn_param); 2877 if (ret) 2878 goto out; 2879 2880 if (conn_param) { 2881 iw_param.ord = conn_param->initiator_depth; 2882 iw_param.ird = conn_param->responder_resources; 2883 iw_param.private_data = conn_param->private_data; 2884 iw_param.private_data_len = conn_param->private_data_len; 2885 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num; 2886 } else { 2887 memset(&iw_param, 0, sizeof iw_param); 2888 iw_param.qpn = id_priv->qp_num; 2889 } 2890 ret = iw_cm_connect(cm_id, &iw_param); 2891 out: 2892 if (ret) { 2893 iw_destroy_cm_id(cm_id); 2894 id_priv->cm_id.iw = NULL; 2895 } 2896 return ret; 2897 } 2898 2899 int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) 2900 { 2901 struct rdma_id_private *id_priv; 2902 int ret; 2903 2904 id_priv = container_of(id, struct rdma_id_private, id); 2905 if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT)) 2906 return -EINVAL; 2907 2908 if (!id->qp) { 2909 id_priv->qp_num = conn_param->qp_num; 2910 id_priv->srq = conn_param->srq; 2911 } 2912 2913 switch (rdma_node_get_transport(id->device->node_type)) { 2914 case RDMA_TRANSPORT_IB: 2915 if (id->qp_type == IB_QPT_UD) 2916 ret = cma_resolve_ib_udp(id_priv, conn_param); 2917 else 2918 ret = cma_connect_ib(id_priv, conn_param); 2919 break; 2920 case RDMA_TRANSPORT_IWARP: 2921 ret = cma_connect_iw(id_priv, conn_param); 2922 break; 2923 default: 2924 ret = -ENOSYS; 2925 break; 2926 } 2927 if (ret) 2928 goto err; 2929 2930 return 0; 2931 err: 2932 cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED); 2933 return ret; 2934 } 2935 EXPORT_SYMBOL(rdma_connect); 2936 2937 static int cma_accept_ib(struct rdma_id_private *id_priv, 2938 struct rdma_conn_param *conn_param) 2939 { 2940 struct ib_cm_rep_param rep; 2941 int ret; 2942 2943 ret = cma_modify_qp_rtr(id_priv, conn_param); 2944 if (ret) 2945 goto out; 2946 2947 ret = cma_modify_qp_rts(id_priv, conn_param); 2948 if (ret) 2949 goto out; 2950 2951 memset(&rep, 0, sizeof rep); 2952 rep.qp_num = id_priv->qp_num; 2953 rep.starting_psn = id_priv->seq_num; 2954 rep.private_data = conn_param->private_data; 2955 rep.private_data_len = conn_param->private_data_len; 2956 rep.responder_resources = conn_param->responder_resources; 2957 rep.initiator_depth = conn_param->initiator_depth; 2958 rep.failover_accepted = 0; 2959 rep.flow_control = conn_param->flow_control; 2960 rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count); 2961 rep.srq = id_priv->srq ? 1 : 0; 2962 2963 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep); 2964 out: 2965 return ret; 2966 } 2967 2968 static int cma_accept_iw(struct rdma_id_private *id_priv, 2969 struct rdma_conn_param *conn_param) 2970 { 2971 struct iw_cm_conn_param iw_param; 2972 int ret; 2973 2974 ret = cma_modify_qp_rtr(id_priv, conn_param); 2975 if (ret) 2976 return ret; 2977 2978 iw_param.ord = conn_param->initiator_depth; 2979 iw_param.ird = conn_param->responder_resources; 2980 iw_param.private_data = conn_param->private_data; 2981 iw_param.private_data_len = conn_param->private_data_len; 2982 if (id_priv->id.qp) { 2983 iw_param.qpn = id_priv->qp_num; 2984 } else 2985 iw_param.qpn = conn_param->qp_num; 2986 2987 return iw_cm_accept(id_priv->cm_id.iw, &iw_param); 2988 } 2989 2990 static int cma_send_sidr_rep(struct rdma_id_private *id_priv, 2991 enum ib_cm_sidr_status status, u32 qkey, 2992 const void *private_data, int private_data_len) 2993 { 2994 struct ib_cm_sidr_rep_param rep; 2995 int ret; 2996 2997 memset(&rep, 0, sizeof rep); 2998 rep.status = status; 2999 if (status == IB_SIDR_SUCCESS) { 3000 ret = cma_set_qkey(id_priv, qkey); 3001 if (ret) 3002 return ret; 3003 rep.qp_num = id_priv->qp_num; 3004 rep.qkey = id_priv->qkey; 3005 } 3006 rep.private_data = private_data; 3007 rep.private_data_len = private_data_len; 3008 3009 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep); 3010 } 3011 3012 int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) 3013 { 3014 struct rdma_id_private *id_priv; 3015 int ret; 3016 3017 id_priv = container_of(id, struct rdma_id_private, id); 3018 3019 id_priv->owner = task_pid_nr(current); 3020 3021 if (!cma_comp(id_priv, RDMA_CM_CONNECT)) 3022 return -EINVAL; 3023 3024 if (!id->qp && conn_param) { 3025 id_priv->qp_num = conn_param->qp_num; 3026 id_priv->srq = conn_param->srq; 3027 } 3028 3029 switch (rdma_node_get_transport(id->device->node_type)) { 3030 case RDMA_TRANSPORT_IB: 3031 if (id->qp_type == IB_QPT_UD) { 3032 if (conn_param) 3033 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS, 3034 conn_param->qkey, 3035 conn_param->private_data, 3036 conn_param->private_data_len); 3037 else 3038 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS, 3039 0, NULL, 0); 3040 } else { 3041 if (conn_param) 3042 ret = cma_accept_ib(id_priv, conn_param); 3043 else 3044 ret = cma_rep_recv(id_priv); 3045 } 3046 break; 3047 case RDMA_TRANSPORT_IWARP: 3048 ret = cma_accept_iw(id_priv, conn_param); 3049 break; 3050 default: 3051 ret = -ENOSYS; 3052 break; 3053 } 3054 3055 if (ret) 3056 goto reject; 3057 3058 return 0; 3059 reject: 3060 cma_modify_qp_err(id_priv); 3061 rdma_reject(id, NULL, 0); 3062 return ret; 3063 } 3064 EXPORT_SYMBOL(rdma_accept); 3065 3066 int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event) 3067 { 3068 struct rdma_id_private *id_priv; 3069 int ret; 3070 3071 id_priv = container_of(id, struct rdma_id_private, id); 3072 if (!id_priv->cm_id.ib) 3073 return -EINVAL; 3074 3075 switch (id->device->node_type) { 3076 case RDMA_NODE_IB_CA: 3077 ret = ib_cm_notify(id_priv->cm_id.ib, event); 3078 break; 3079 default: 3080 ret = 0; 3081 break; 3082 } 3083 return ret; 3084 } 3085 EXPORT_SYMBOL(rdma_notify); 3086 3087 int rdma_reject(struct rdma_cm_id *id, const void *private_data, 3088 u8 private_data_len) 3089 { 3090 struct rdma_id_private *id_priv; 3091 int ret; 3092 3093 id_priv = container_of(id, struct rdma_id_private, id); 3094 if (!id_priv->cm_id.ib) 3095 return -EINVAL; 3096 3097 switch (rdma_node_get_transport(id->device->node_type)) { 3098 case RDMA_TRANSPORT_IB: 3099 if (id->qp_type == IB_QPT_UD) 3100 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0, 3101 private_data, private_data_len); 3102 else 3103 ret = ib_send_cm_rej(id_priv->cm_id.ib, 3104 IB_CM_REJ_CONSUMER_DEFINED, NULL, 3105 0, private_data, private_data_len); 3106 break; 3107 case RDMA_TRANSPORT_IWARP: 3108 ret = iw_cm_reject(id_priv->cm_id.iw, 3109 private_data, private_data_len); 3110 break; 3111 default: 3112 ret = -ENOSYS; 3113 break; 3114 } 3115 return ret; 3116 } 3117 EXPORT_SYMBOL(rdma_reject); 3118 3119 int rdma_disconnect(struct rdma_cm_id *id) 3120 { 3121 struct rdma_id_private *id_priv; 3122 int ret; 3123 3124 id_priv = container_of(id, struct rdma_id_private, id); 3125 if (!id_priv->cm_id.ib) 3126 return -EINVAL; 3127 3128 switch (rdma_node_get_transport(id->device->node_type)) { 3129 case RDMA_TRANSPORT_IB: 3130 ret = cma_modify_qp_err(id_priv); 3131 if (ret) 3132 goto out; 3133 /* Initiate or respond to a disconnect. */ 3134 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0)) 3135 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0); 3136 break; 3137 case RDMA_TRANSPORT_IWARP: 3138 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0); 3139 break; 3140 default: 3141 ret = -EINVAL; 3142 break; 3143 } 3144 out: 3145 return ret; 3146 } 3147 EXPORT_SYMBOL(rdma_disconnect); 3148 3149 static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast) 3150 { 3151 struct rdma_id_private *id_priv; 3152 struct cma_multicast *mc = multicast->context; 3153 struct rdma_cm_event event; 3154 int ret; 3155 3156 id_priv = mc->id_priv; 3157 if (cma_disable_callback(id_priv, RDMA_CM_ADDR_BOUND) && 3158 cma_disable_callback(id_priv, RDMA_CM_ADDR_RESOLVED)) 3159 return 0; 3160 3161 if (!status) 3162 status = cma_set_qkey(id_priv, be32_to_cpu(multicast->rec.qkey)); 3163 mutex_lock(&id_priv->qp_mutex); 3164 if (!status && id_priv->id.qp) 3165 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid, 3166 be16_to_cpu(multicast->rec.mlid)); 3167 mutex_unlock(&id_priv->qp_mutex); 3168 3169 memset(&event, 0, sizeof event); 3170 event.status = status; 3171 event.param.ud.private_data = mc->context; 3172 if (!status) { 3173 event.event = RDMA_CM_EVENT_MULTICAST_JOIN; 3174 ib_init_ah_from_mcmember(id_priv->id.device, 3175 id_priv->id.port_num, &multicast->rec, 3176 &event.param.ud.ah_attr); 3177 event.param.ud.qp_num = 0xFFFFFF; 3178 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey); 3179 } else 3180 event.event = RDMA_CM_EVENT_MULTICAST_ERROR; 3181 3182 ret = id_priv->id.event_handler(&id_priv->id, &event); 3183 if (ret) { 3184 cma_exch(id_priv, RDMA_CM_DESTROYING); 3185 mutex_unlock(&id_priv->handler_mutex); 3186 rdma_destroy_id(&id_priv->id); 3187 return 0; 3188 } 3189 3190 mutex_unlock(&id_priv->handler_mutex); 3191 return 0; 3192 } 3193 3194 static void cma_set_mgid(struct rdma_id_private *id_priv, 3195 struct sockaddr *addr, union ib_gid *mgid) 3196 { 3197 unsigned char mc_map[MAX_ADDR_LEN]; 3198 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 3199 struct sockaddr_in *sin = (struct sockaddr_in *) addr; 3200 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr; 3201 3202 if (cma_any_addr(addr)) { 3203 memset(mgid, 0, sizeof *mgid); 3204 } else if ((addr->sa_family == AF_INET6) && 3205 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) == 3206 0xFF10A01B)) { 3207 /* IPv6 address is an SA assigned MGID. */ 3208 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid); 3209 } else if (addr->sa_family == AF_IB) { 3210 memcpy(mgid, &((struct sockaddr_ib *) addr)->sib_addr, sizeof *mgid); 3211 } else if ((addr->sa_family == AF_INET6)) { 3212 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map); 3213 if (id_priv->id.ps == RDMA_PS_UDP) 3214 mc_map[7] = 0x01; /* Use RDMA CM signature */ 3215 *mgid = *(union ib_gid *) (mc_map + 4); 3216 } else { 3217 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map); 3218 if (id_priv->id.ps == RDMA_PS_UDP) 3219 mc_map[7] = 0x01; /* Use RDMA CM signature */ 3220 *mgid = *(union ib_gid *) (mc_map + 4); 3221 } 3222 } 3223 3224 static int cma_join_ib_multicast(struct rdma_id_private *id_priv, 3225 struct cma_multicast *mc) 3226 { 3227 struct ib_sa_mcmember_rec rec; 3228 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 3229 ib_sa_comp_mask comp_mask; 3230 int ret; 3231 3232 ib_addr_get_mgid(dev_addr, &rec.mgid); 3233 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num, 3234 &rec.mgid, &rec); 3235 if (ret) 3236 return ret; 3237 3238 ret = cma_set_qkey(id_priv, 0); 3239 if (ret) 3240 return ret; 3241 3242 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid); 3243 rec.qkey = cpu_to_be32(id_priv->qkey); 3244 rdma_addr_get_sgid(dev_addr, &rec.port_gid); 3245 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); 3246 rec.join_state = 1; 3247 3248 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID | 3249 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE | 3250 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL | 3251 IB_SA_MCMEMBER_REC_FLOW_LABEL | 3252 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS; 3253 3254 if (id_priv->id.ps == RDMA_PS_IPOIB) 3255 comp_mask |= IB_SA_MCMEMBER_REC_RATE | 3256 IB_SA_MCMEMBER_REC_RATE_SELECTOR | 3257 IB_SA_MCMEMBER_REC_MTU_SELECTOR | 3258 IB_SA_MCMEMBER_REC_MTU | 3259 IB_SA_MCMEMBER_REC_HOP_LIMIT; 3260 3261 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device, 3262 id_priv->id.port_num, &rec, 3263 comp_mask, GFP_KERNEL, 3264 cma_ib_mc_handler, mc); 3265 return PTR_ERR_OR_ZERO(mc->multicast.ib); 3266 } 3267 3268 static void iboe_mcast_work_handler(struct work_struct *work) 3269 { 3270 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work); 3271 struct cma_multicast *mc = mw->mc; 3272 struct ib_sa_multicast *m = mc->multicast.ib; 3273 3274 mc->multicast.ib->context = mc; 3275 cma_ib_mc_handler(0, m); 3276 kref_put(&mc->mcref, release_mc); 3277 kfree(mw); 3278 } 3279 3280 static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid) 3281 { 3282 struct sockaddr_in *sin = (struct sockaddr_in *)addr; 3283 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr; 3284 3285 if (cma_any_addr(addr)) { 3286 memset(mgid, 0, sizeof *mgid); 3287 } else if (addr->sa_family == AF_INET6) { 3288 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid); 3289 } else { 3290 mgid->raw[0] = 0xff; 3291 mgid->raw[1] = 0x0e; 3292 mgid->raw[2] = 0; 3293 mgid->raw[3] = 0; 3294 mgid->raw[4] = 0; 3295 mgid->raw[5] = 0; 3296 mgid->raw[6] = 0; 3297 mgid->raw[7] = 0; 3298 mgid->raw[8] = 0; 3299 mgid->raw[9] = 0; 3300 mgid->raw[10] = 0xff; 3301 mgid->raw[11] = 0xff; 3302 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr; 3303 } 3304 } 3305 3306 static int cma_iboe_join_multicast(struct rdma_id_private *id_priv, 3307 struct cma_multicast *mc) 3308 { 3309 struct iboe_mcast_work *work; 3310 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 3311 int err; 3312 struct sockaddr *addr = (struct sockaddr *)&mc->addr; 3313 struct net_device *ndev = NULL; 3314 3315 if (cma_zero_addr((struct sockaddr *)&mc->addr)) 3316 return -EINVAL; 3317 3318 work = kzalloc(sizeof *work, GFP_KERNEL); 3319 if (!work) 3320 return -ENOMEM; 3321 3322 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL); 3323 if (!mc->multicast.ib) { 3324 err = -ENOMEM; 3325 goto out1; 3326 } 3327 3328 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid); 3329 3330 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff); 3331 if (id_priv->id.ps == RDMA_PS_UDP) 3332 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY); 3333 3334 if (dev_addr->bound_dev_if) 3335 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if); 3336 if (!ndev) { 3337 err = -ENODEV; 3338 goto out2; 3339 } 3340 mc->multicast.ib->rec.rate = iboe_get_rate(ndev); 3341 mc->multicast.ib->rec.hop_limit = 1; 3342 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu); 3343 dev_put(ndev); 3344 if (!mc->multicast.ib->rec.mtu) { 3345 err = -EINVAL; 3346 goto out2; 3347 } 3348 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr, 3349 &mc->multicast.ib->rec.port_gid); 3350 work->id = id_priv; 3351 work->mc = mc; 3352 INIT_WORK(&work->work, iboe_mcast_work_handler); 3353 kref_get(&mc->mcref); 3354 queue_work(cma_wq, &work->work); 3355 3356 return 0; 3357 3358 out2: 3359 kfree(mc->multicast.ib); 3360 out1: 3361 kfree(work); 3362 return err; 3363 } 3364 3365 int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr, 3366 void *context) 3367 { 3368 struct rdma_id_private *id_priv; 3369 struct cma_multicast *mc; 3370 int ret; 3371 3372 id_priv = container_of(id, struct rdma_id_private, id); 3373 if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) && 3374 !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED)) 3375 return -EINVAL; 3376 3377 mc = kmalloc(sizeof *mc, GFP_KERNEL); 3378 if (!mc) 3379 return -ENOMEM; 3380 3381 memcpy(&mc->addr, addr, rdma_addr_size(addr)); 3382 mc->context = context; 3383 mc->id_priv = id_priv; 3384 3385 spin_lock(&id_priv->lock); 3386 list_add(&mc->list, &id_priv->mc_list); 3387 spin_unlock(&id_priv->lock); 3388 3389 switch (rdma_node_get_transport(id->device->node_type)) { 3390 case RDMA_TRANSPORT_IB: 3391 switch (rdma_port_get_link_layer(id->device, id->port_num)) { 3392 case IB_LINK_LAYER_INFINIBAND: 3393 ret = cma_join_ib_multicast(id_priv, mc); 3394 break; 3395 case IB_LINK_LAYER_ETHERNET: 3396 kref_init(&mc->mcref); 3397 ret = cma_iboe_join_multicast(id_priv, mc); 3398 break; 3399 default: 3400 ret = -EINVAL; 3401 } 3402 break; 3403 default: 3404 ret = -ENOSYS; 3405 break; 3406 } 3407 3408 if (ret) { 3409 spin_lock_irq(&id_priv->lock); 3410 list_del(&mc->list); 3411 spin_unlock_irq(&id_priv->lock); 3412 kfree(mc); 3413 } 3414 return ret; 3415 } 3416 EXPORT_SYMBOL(rdma_join_multicast); 3417 3418 void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr) 3419 { 3420 struct rdma_id_private *id_priv; 3421 struct cma_multicast *mc; 3422 3423 id_priv = container_of(id, struct rdma_id_private, id); 3424 spin_lock_irq(&id_priv->lock); 3425 list_for_each_entry(mc, &id_priv->mc_list, list) { 3426 if (!memcmp(&mc->addr, addr, rdma_addr_size(addr))) { 3427 list_del(&mc->list); 3428 spin_unlock_irq(&id_priv->lock); 3429 3430 if (id->qp) 3431 ib_detach_mcast(id->qp, 3432 &mc->multicast.ib->rec.mgid, 3433 be16_to_cpu(mc->multicast.ib->rec.mlid)); 3434 if (rdma_node_get_transport(id_priv->cma_dev->device->node_type) == RDMA_TRANSPORT_IB) { 3435 switch (rdma_port_get_link_layer(id->device, id->port_num)) { 3436 case IB_LINK_LAYER_INFINIBAND: 3437 ib_sa_free_multicast(mc->multicast.ib); 3438 kfree(mc); 3439 break; 3440 case IB_LINK_LAYER_ETHERNET: 3441 kref_put(&mc->mcref, release_mc); 3442 break; 3443 default: 3444 break; 3445 } 3446 } 3447 return; 3448 } 3449 } 3450 spin_unlock_irq(&id_priv->lock); 3451 } 3452 EXPORT_SYMBOL(rdma_leave_multicast); 3453 3454 static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv) 3455 { 3456 struct rdma_dev_addr *dev_addr; 3457 struct cma_ndev_work *work; 3458 3459 dev_addr = &id_priv->id.route.addr.dev_addr; 3460 3461 if ((dev_addr->bound_dev_if == ndev->ifindex) && 3462 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) { 3463 printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n", 3464 ndev->name, &id_priv->id); 3465 work = kzalloc(sizeof *work, GFP_KERNEL); 3466 if (!work) 3467 return -ENOMEM; 3468 3469 INIT_WORK(&work->work, cma_ndev_work_handler); 3470 work->id = id_priv; 3471 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE; 3472 atomic_inc(&id_priv->refcount); 3473 queue_work(cma_wq, &work->work); 3474 } 3475 3476 return 0; 3477 } 3478 3479 static int cma_netdev_callback(struct notifier_block *self, unsigned long event, 3480 void *ptr) 3481 { 3482 struct net_device *ndev = netdev_notifier_info_to_dev(ptr); 3483 struct cma_device *cma_dev; 3484 struct rdma_id_private *id_priv; 3485 int ret = NOTIFY_DONE; 3486 3487 if (dev_net(ndev) != &init_net) 3488 return NOTIFY_DONE; 3489 3490 if (event != NETDEV_BONDING_FAILOVER) 3491 return NOTIFY_DONE; 3492 3493 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING)) 3494 return NOTIFY_DONE; 3495 3496 mutex_lock(&lock); 3497 list_for_each_entry(cma_dev, &dev_list, list) 3498 list_for_each_entry(id_priv, &cma_dev->id_list, list) { 3499 ret = cma_netdev_change(ndev, id_priv); 3500 if (ret) 3501 goto out; 3502 } 3503 3504 out: 3505 mutex_unlock(&lock); 3506 return ret; 3507 } 3508 3509 static struct notifier_block cma_nb = { 3510 .notifier_call = cma_netdev_callback 3511 }; 3512 3513 static void cma_add_one(struct ib_device *device) 3514 { 3515 struct cma_device *cma_dev; 3516 struct rdma_id_private *id_priv; 3517 3518 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL); 3519 if (!cma_dev) 3520 return; 3521 3522 cma_dev->device = device; 3523 3524 init_completion(&cma_dev->comp); 3525 atomic_set(&cma_dev->refcount, 1); 3526 INIT_LIST_HEAD(&cma_dev->id_list); 3527 ib_set_client_data(device, &cma_client, cma_dev); 3528 3529 mutex_lock(&lock); 3530 list_add_tail(&cma_dev->list, &dev_list); 3531 list_for_each_entry(id_priv, &listen_any_list, list) 3532 cma_listen_on_dev(id_priv, cma_dev); 3533 mutex_unlock(&lock); 3534 } 3535 3536 static int cma_remove_id_dev(struct rdma_id_private *id_priv) 3537 { 3538 struct rdma_cm_event event; 3539 enum rdma_cm_state state; 3540 int ret = 0; 3541 3542 /* Record that we want to remove the device */ 3543 state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL); 3544 if (state == RDMA_CM_DESTROYING) 3545 return 0; 3546 3547 cma_cancel_operation(id_priv, state); 3548 mutex_lock(&id_priv->handler_mutex); 3549 3550 /* Check for destruction from another callback. */ 3551 if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL)) 3552 goto out; 3553 3554 memset(&event, 0, sizeof event); 3555 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL; 3556 ret = id_priv->id.event_handler(&id_priv->id, &event); 3557 out: 3558 mutex_unlock(&id_priv->handler_mutex); 3559 return ret; 3560 } 3561 3562 static void cma_process_remove(struct cma_device *cma_dev) 3563 { 3564 struct rdma_id_private *id_priv; 3565 int ret; 3566 3567 mutex_lock(&lock); 3568 while (!list_empty(&cma_dev->id_list)) { 3569 id_priv = list_entry(cma_dev->id_list.next, 3570 struct rdma_id_private, list); 3571 3572 list_del(&id_priv->listen_list); 3573 list_del_init(&id_priv->list); 3574 atomic_inc(&id_priv->refcount); 3575 mutex_unlock(&lock); 3576 3577 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv); 3578 cma_deref_id(id_priv); 3579 if (ret) 3580 rdma_destroy_id(&id_priv->id); 3581 3582 mutex_lock(&lock); 3583 } 3584 mutex_unlock(&lock); 3585 3586 cma_deref_dev(cma_dev); 3587 wait_for_completion(&cma_dev->comp); 3588 } 3589 3590 static void cma_remove_one(struct ib_device *device) 3591 { 3592 struct cma_device *cma_dev; 3593 3594 cma_dev = ib_get_client_data(device, &cma_client); 3595 if (!cma_dev) 3596 return; 3597 3598 mutex_lock(&lock); 3599 list_del(&cma_dev->list); 3600 mutex_unlock(&lock); 3601 3602 cma_process_remove(cma_dev); 3603 kfree(cma_dev); 3604 } 3605 3606 static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb) 3607 { 3608 struct nlmsghdr *nlh; 3609 struct rdma_cm_id_stats *id_stats; 3610 struct rdma_id_private *id_priv; 3611 struct rdma_cm_id *id = NULL; 3612 struct cma_device *cma_dev; 3613 int i_dev = 0, i_id = 0; 3614 3615 /* 3616 * We export all of the IDs as a sequence of messages. Each 3617 * ID gets its own netlink message. 3618 */ 3619 mutex_lock(&lock); 3620 3621 list_for_each_entry(cma_dev, &dev_list, list) { 3622 if (i_dev < cb->args[0]) { 3623 i_dev++; 3624 continue; 3625 } 3626 3627 i_id = 0; 3628 list_for_each_entry(id_priv, &cma_dev->id_list, list) { 3629 if (i_id < cb->args[1]) { 3630 i_id++; 3631 continue; 3632 } 3633 3634 id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq, 3635 sizeof *id_stats, RDMA_NL_RDMA_CM, 3636 RDMA_NL_RDMA_CM_ID_STATS); 3637 if (!id_stats) 3638 goto out; 3639 3640 memset(id_stats, 0, sizeof *id_stats); 3641 id = &id_priv->id; 3642 id_stats->node_type = id->route.addr.dev_addr.dev_type; 3643 id_stats->port_num = id->port_num; 3644 id_stats->bound_dev_if = 3645 id->route.addr.dev_addr.bound_dev_if; 3646 3647 if (ibnl_put_attr(skb, nlh, 3648 rdma_addr_size(cma_src_addr(id_priv)), 3649 cma_src_addr(id_priv), 3650 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR)) 3651 goto out; 3652 if (ibnl_put_attr(skb, nlh, 3653 rdma_addr_size(cma_src_addr(id_priv)), 3654 cma_dst_addr(id_priv), 3655 RDMA_NL_RDMA_CM_ATTR_DST_ADDR)) 3656 goto out; 3657 3658 id_stats->pid = id_priv->owner; 3659 id_stats->port_space = id->ps; 3660 id_stats->cm_state = id_priv->state; 3661 id_stats->qp_num = id_priv->qp_num; 3662 id_stats->qp_type = id->qp_type; 3663 3664 i_id++; 3665 } 3666 3667 cb->args[1] = 0; 3668 i_dev++; 3669 } 3670 3671 out: 3672 mutex_unlock(&lock); 3673 cb->args[0] = i_dev; 3674 cb->args[1] = i_id; 3675 3676 return skb->len; 3677 } 3678 3679 static const struct ibnl_client_cbs cma_cb_table[] = { 3680 [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats, 3681 .module = THIS_MODULE }, 3682 }; 3683 3684 static int __init cma_init(void) 3685 { 3686 int ret; 3687 3688 cma_wq = create_singlethread_workqueue("rdma_cm"); 3689 if (!cma_wq) 3690 return -ENOMEM; 3691 3692 ib_sa_register_client(&sa_client); 3693 rdma_addr_register_client(&addr_client); 3694 register_netdevice_notifier(&cma_nb); 3695 3696 ret = ib_register_client(&cma_client); 3697 if (ret) 3698 goto err; 3699 3700 if (ibnl_add_client(RDMA_NL_RDMA_CM, RDMA_NL_RDMA_CM_NUM_OPS, cma_cb_table)) 3701 printk(KERN_WARNING "RDMA CMA: failed to add netlink callback\n"); 3702 3703 return 0; 3704 3705 err: 3706 unregister_netdevice_notifier(&cma_nb); 3707 rdma_addr_unregister_client(&addr_client); 3708 ib_sa_unregister_client(&sa_client); 3709 destroy_workqueue(cma_wq); 3710 return ret; 3711 } 3712 3713 static void __exit cma_cleanup(void) 3714 { 3715 ibnl_remove_client(RDMA_NL_RDMA_CM); 3716 ib_unregister_client(&cma_client); 3717 unregister_netdevice_notifier(&cma_nb); 3718 rdma_addr_unregister_client(&addr_client); 3719 ib_sa_unregister_client(&sa_client); 3720 destroy_workqueue(cma_wq); 3721 idr_destroy(&tcp_ps); 3722 idr_destroy(&udp_ps); 3723 idr_destroy(&ipoib_ps); 3724 idr_destroy(&ib_ps); 3725 } 3726 3727 module_init(cma_init); 3728 module_exit(cma_cleanup); 3729