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 if (path) { 849 ib->sib_pkey = path->pkey; 850 ib->sib_flowinfo = path->flow_label; 851 memcpy(&ib->sib_addr, &path->sgid, 16); 852 } else { 853 ib->sib_pkey = listen_ib->sib_pkey; 854 ib->sib_flowinfo = listen_ib->sib_flowinfo; 855 ib->sib_addr = listen_ib->sib_addr; 856 } 857 ib->sib_sid = listen_ib->sib_sid; 858 ib->sib_sid_mask = cpu_to_be64(0xffffffffffffffffULL); 859 ib->sib_scope_id = listen_ib->sib_scope_id; 860 861 if (path) { 862 ib = (struct sockaddr_ib *) &id->route.addr.dst_addr; 863 ib->sib_family = listen_ib->sib_family; 864 ib->sib_pkey = path->pkey; 865 ib->sib_flowinfo = path->flow_label; 866 memcpy(&ib->sib_addr, &path->dgid, 16); 867 } 868 } 869 870 static __be16 ss_get_port(const struct sockaddr_storage *ss) 871 { 872 if (ss->ss_family == AF_INET) 873 return ((struct sockaddr_in *)ss)->sin_port; 874 else if (ss->ss_family == AF_INET6) 875 return ((struct sockaddr_in6 *)ss)->sin6_port; 876 BUG(); 877 } 878 879 static void cma_save_ip4_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id, 880 struct cma_hdr *hdr) 881 { 882 struct sockaddr_in *ip4; 883 884 ip4 = (struct sockaddr_in *) &id->route.addr.src_addr; 885 ip4->sin_family = AF_INET; 886 ip4->sin_addr.s_addr = hdr->dst_addr.ip4.addr; 887 ip4->sin_port = ss_get_port(&listen_id->route.addr.src_addr); 888 889 ip4 = (struct sockaddr_in *) &id->route.addr.dst_addr; 890 ip4->sin_family = AF_INET; 891 ip4->sin_addr.s_addr = hdr->src_addr.ip4.addr; 892 ip4->sin_port = hdr->port; 893 } 894 895 static void cma_save_ip6_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id, 896 struct cma_hdr *hdr) 897 { 898 struct sockaddr_in6 *ip6; 899 900 ip6 = (struct sockaddr_in6 *) &id->route.addr.src_addr; 901 ip6->sin6_family = AF_INET6; 902 ip6->sin6_addr = hdr->dst_addr.ip6; 903 ip6->sin6_port = ss_get_port(&listen_id->route.addr.src_addr); 904 905 ip6 = (struct sockaddr_in6 *) &id->route.addr.dst_addr; 906 ip6->sin6_family = AF_INET6; 907 ip6->sin6_addr = hdr->src_addr.ip6; 908 ip6->sin6_port = hdr->port; 909 } 910 911 static int cma_save_net_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id, 912 struct ib_cm_event *ib_event) 913 { 914 struct cma_hdr *hdr; 915 916 if (listen_id->route.addr.src_addr.ss_family == AF_IB) { 917 if (ib_event->event == IB_CM_REQ_RECEIVED) 918 cma_save_ib_info(id, listen_id, ib_event->param.req_rcvd.primary_path); 919 else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) 920 cma_save_ib_info(id, listen_id, NULL); 921 return 0; 922 } 923 924 hdr = ib_event->private_data; 925 if (hdr->cma_version != CMA_VERSION) 926 return -EINVAL; 927 928 switch (cma_get_ip_ver(hdr)) { 929 case 4: 930 cma_save_ip4_info(id, listen_id, hdr); 931 break; 932 case 6: 933 cma_save_ip6_info(id, listen_id, hdr); 934 break; 935 default: 936 return -EINVAL; 937 } 938 return 0; 939 } 940 941 static inline int cma_user_data_offset(struct rdma_id_private *id_priv) 942 { 943 return cma_family(id_priv) == AF_IB ? 0 : sizeof(struct cma_hdr); 944 } 945 946 static void cma_cancel_route(struct rdma_id_private *id_priv) 947 { 948 switch (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num)) { 949 case IB_LINK_LAYER_INFINIBAND: 950 if (id_priv->query) 951 ib_sa_cancel_query(id_priv->query_id, id_priv->query); 952 break; 953 default: 954 break; 955 } 956 } 957 958 static void cma_cancel_listens(struct rdma_id_private *id_priv) 959 { 960 struct rdma_id_private *dev_id_priv; 961 962 /* 963 * Remove from listen_any_list to prevent added devices from spawning 964 * additional listen requests. 965 */ 966 mutex_lock(&lock); 967 list_del(&id_priv->list); 968 969 while (!list_empty(&id_priv->listen_list)) { 970 dev_id_priv = list_entry(id_priv->listen_list.next, 971 struct rdma_id_private, listen_list); 972 /* sync with device removal to avoid duplicate destruction */ 973 list_del_init(&dev_id_priv->list); 974 list_del(&dev_id_priv->listen_list); 975 mutex_unlock(&lock); 976 977 rdma_destroy_id(&dev_id_priv->id); 978 mutex_lock(&lock); 979 } 980 mutex_unlock(&lock); 981 } 982 983 static void cma_cancel_operation(struct rdma_id_private *id_priv, 984 enum rdma_cm_state state) 985 { 986 switch (state) { 987 case RDMA_CM_ADDR_QUERY: 988 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr); 989 break; 990 case RDMA_CM_ROUTE_QUERY: 991 cma_cancel_route(id_priv); 992 break; 993 case RDMA_CM_LISTEN: 994 if (cma_any_addr(cma_src_addr(id_priv)) && !id_priv->cma_dev) 995 cma_cancel_listens(id_priv); 996 break; 997 default: 998 break; 999 } 1000 } 1001 1002 static void cma_release_port(struct rdma_id_private *id_priv) 1003 { 1004 struct rdma_bind_list *bind_list = id_priv->bind_list; 1005 1006 if (!bind_list) 1007 return; 1008 1009 mutex_lock(&lock); 1010 hlist_del(&id_priv->node); 1011 if (hlist_empty(&bind_list->owners)) { 1012 idr_remove(bind_list->ps, bind_list->port); 1013 kfree(bind_list); 1014 } 1015 mutex_unlock(&lock); 1016 } 1017 1018 static void cma_leave_mc_groups(struct rdma_id_private *id_priv) 1019 { 1020 struct cma_multicast *mc; 1021 1022 while (!list_empty(&id_priv->mc_list)) { 1023 mc = container_of(id_priv->mc_list.next, 1024 struct cma_multicast, list); 1025 list_del(&mc->list); 1026 switch (rdma_port_get_link_layer(id_priv->cma_dev->device, id_priv->id.port_num)) { 1027 case IB_LINK_LAYER_INFINIBAND: 1028 ib_sa_free_multicast(mc->multicast.ib); 1029 kfree(mc); 1030 break; 1031 case IB_LINK_LAYER_ETHERNET: 1032 kref_put(&mc->mcref, release_mc); 1033 break; 1034 default: 1035 break; 1036 } 1037 } 1038 } 1039 1040 void rdma_destroy_id(struct rdma_cm_id *id) 1041 { 1042 struct rdma_id_private *id_priv; 1043 enum rdma_cm_state state; 1044 1045 id_priv = container_of(id, struct rdma_id_private, id); 1046 state = cma_exch(id_priv, RDMA_CM_DESTROYING); 1047 cma_cancel_operation(id_priv, state); 1048 1049 /* 1050 * Wait for any active callback to finish. New callbacks will find 1051 * the id_priv state set to destroying and abort. 1052 */ 1053 mutex_lock(&id_priv->handler_mutex); 1054 mutex_unlock(&id_priv->handler_mutex); 1055 1056 if (id_priv->cma_dev) { 1057 switch (rdma_node_get_transport(id_priv->id.device->node_type)) { 1058 case RDMA_TRANSPORT_IB: 1059 if (id_priv->cm_id.ib) 1060 ib_destroy_cm_id(id_priv->cm_id.ib); 1061 break; 1062 case RDMA_TRANSPORT_IWARP: 1063 if (id_priv->cm_id.iw) 1064 iw_destroy_cm_id(id_priv->cm_id.iw); 1065 break; 1066 default: 1067 break; 1068 } 1069 cma_leave_mc_groups(id_priv); 1070 cma_release_dev(id_priv); 1071 } 1072 1073 cma_release_port(id_priv); 1074 cma_deref_id(id_priv); 1075 wait_for_completion(&id_priv->comp); 1076 1077 if (id_priv->internal_id) 1078 cma_deref_id(id_priv->id.context); 1079 1080 kfree(id_priv->id.route.path_rec); 1081 kfree(id_priv); 1082 } 1083 EXPORT_SYMBOL(rdma_destroy_id); 1084 1085 static int cma_rep_recv(struct rdma_id_private *id_priv) 1086 { 1087 int ret; 1088 1089 ret = cma_modify_qp_rtr(id_priv, NULL); 1090 if (ret) 1091 goto reject; 1092 1093 ret = cma_modify_qp_rts(id_priv, NULL); 1094 if (ret) 1095 goto reject; 1096 1097 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0); 1098 if (ret) 1099 goto reject; 1100 1101 return 0; 1102 reject: 1103 cma_modify_qp_err(id_priv); 1104 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED, 1105 NULL, 0, NULL, 0); 1106 return ret; 1107 } 1108 1109 static void cma_set_rep_event_data(struct rdma_cm_event *event, 1110 struct ib_cm_rep_event_param *rep_data, 1111 void *private_data) 1112 { 1113 event->param.conn.private_data = private_data; 1114 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE; 1115 event->param.conn.responder_resources = rep_data->responder_resources; 1116 event->param.conn.initiator_depth = rep_data->initiator_depth; 1117 event->param.conn.flow_control = rep_data->flow_control; 1118 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count; 1119 event->param.conn.srq = rep_data->srq; 1120 event->param.conn.qp_num = rep_data->remote_qpn; 1121 } 1122 1123 static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) 1124 { 1125 struct rdma_id_private *id_priv = cm_id->context; 1126 struct rdma_cm_event event; 1127 int ret = 0; 1128 1129 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT && 1130 cma_disable_callback(id_priv, RDMA_CM_CONNECT)) || 1131 (ib_event->event == IB_CM_TIMEWAIT_EXIT && 1132 cma_disable_callback(id_priv, RDMA_CM_DISCONNECT))) 1133 return 0; 1134 1135 memset(&event, 0, sizeof event); 1136 switch (ib_event->event) { 1137 case IB_CM_REQ_ERROR: 1138 case IB_CM_REP_ERROR: 1139 event.event = RDMA_CM_EVENT_UNREACHABLE; 1140 event.status = -ETIMEDOUT; 1141 break; 1142 case IB_CM_REP_RECEIVED: 1143 if (id_priv->id.qp) { 1144 event.status = cma_rep_recv(id_priv); 1145 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR : 1146 RDMA_CM_EVENT_ESTABLISHED; 1147 } else { 1148 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE; 1149 } 1150 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd, 1151 ib_event->private_data); 1152 break; 1153 case IB_CM_RTU_RECEIVED: 1154 case IB_CM_USER_ESTABLISHED: 1155 event.event = RDMA_CM_EVENT_ESTABLISHED; 1156 break; 1157 case IB_CM_DREQ_ERROR: 1158 event.status = -ETIMEDOUT; /* fall through */ 1159 case IB_CM_DREQ_RECEIVED: 1160 case IB_CM_DREP_RECEIVED: 1161 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT, 1162 RDMA_CM_DISCONNECT)) 1163 goto out; 1164 event.event = RDMA_CM_EVENT_DISCONNECTED; 1165 break; 1166 case IB_CM_TIMEWAIT_EXIT: 1167 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT; 1168 break; 1169 case IB_CM_MRA_RECEIVED: 1170 /* ignore event */ 1171 goto out; 1172 case IB_CM_REJ_RECEIVED: 1173 cma_modify_qp_err(id_priv); 1174 event.status = ib_event->param.rej_rcvd.reason; 1175 event.event = RDMA_CM_EVENT_REJECTED; 1176 event.param.conn.private_data = ib_event->private_data; 1177 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE; 1178 break; 1179 default: 1180 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n", 1181 ib_event->event); 1182 goto out; 1183 } 1184 1185 ret = id_priv->id.event_handler(&id_priv->id, &event); 1186 if (ret) { 1187 /* Destroy the CM ID by returning a non-zero value. */ 1188 id_priv->cm_id.ib = NULL; 1189 cma_exch(id_priv, RDMA_CM_DESTROYING); 1190 mutex_unlock(&id_priv->handler_mutex); 1191 rdma_destroy_id(&id_priv->id); 1192 return ret; 1193 } 1194 out: 1195 mutex_unlock(&id_priv->handler_mutex); 1196 return ret; 1197 } 1198 1199 static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id, 1200 struct ib_cm_event *ib_event) 1201 { 1202 struct rdma_id_private *id_priv; 1203 struct rdma_cm_id *id; 1204 struct rdma_route *rt; 1205 int ret; 1206 1207 id = rdma_create_id(listen_id->event_handler, listen_id->context, 1208 listen_id->ps, ib_event->param.req_rcvd.qp_type); 1209 if (IS_ERR(id)) 1210 return NULL; 1211 1212 id_priv = container_of(id, struct rdma_id_private, id); 1213 if (cma_save_net_info(id, listen_id, ib_event)) 1214 goto err; 1215 1216 rt = &id->route; 1217 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1; 1218 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths, 1219 GFP_KERNEL); 1220 if (!rt->path_rec) 1221 goto err; 1222 1223 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path; 1224 if (rt->num_paths == 2) 1225 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path; 1226 1227 if (cma_any_addr(cma_src_addr(id_priv))) { 1228 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND; 1229 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid); 1230 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey)); 1231 } else { 1232 ret = cma_translate_addr(cma_src_addr(id_priv), &rt->addr.dev_addr); 1233 if (ret) 1234 goto err; 1235 } 1236 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid); 1237 1238 id_priv->state = RDMA_CM_CONNECT; 1239 return id_priv; 1240 1241 err: 1242 rdma_destroy_id(id); 1243 return NULL; 1244 } 1245 1246 static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id, 1247 struct ib_cm_event *ib_event) 1248 { 1249 struct rdma_id_private *id_priv; 1250 struct rdma_cm_id *id; 1251 int ret; 1252 1253 id = rdma_create_id(listen_id->event_handler, listen_id->context, 1254 listen_id->ps, IB_QPT_UD); 1255 if (IS_ERR(id)) 1256 return NULL; 1257 1258 id_priv = container_of(id, struct rdma_id_private, id); 1259 if (cma_save_net_info(id, listen_id, ib_event)) 1260 goto err; 1261 1262 if (!cma_any_addr((struct sockaddr *) &id->route.addr.src_addr)) { 1263 ret = cma_translate_addr(cma_src_addr(id_priv), &id->route.addr.dev_addr); 1264 if (ret) 1265 goto err; 1266 } 1267 1268 id_priv->state = RDMA_CM_CONNECT; 1269 return id_priv; 1270 err: 1271 rdma_destroy_id(id); 1272 return NULL; 1273 } 1274 1275 static void cma_set_req_event_data(struct rdma_cm_event *event, 1276 struct ib_cm_req_event_param *req_data, 1277 void *private_data, int offset) 1278 { 1279 event->param.conn.private_data = private_data + offset; 1280 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset; 1281 event->param.conn.responder_resources = req_data->responder_resources; 1282 event->param.conn.initiator_depth = req_data->initiator_depth; 1283 event->param.conn.flow_control = req_data->flow_control; 1284 event->param.conn.retry_count = req_data->retry_count; 1285 event->param.conn.rnr_retry_count = req_data->rnr_retry_count; 1286 event->param.conn.srq = req_data->srq; 1287 event->param.conn.qp_num = req_data->remote_qpn; 1288 } 1289 1290 static int cma_check_req_qp_type(struct rdma_cm_id *id, struct ib_cm_event *ib_event) 1291 { 1292 return (((ib_event->event == IB_CM_REQ_RECEIVED) && 1293 (ib_event->param.req_rcvd.qp_type == id->qp_type)) || 1294 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) && 1295 (id->qp_type == IB_QPT_UD)) || 1296 (!id->qp_type)); 1297 } 1298 1299 static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) 1300 { 1301 struct rdma_id_private *listen_id, *conn_id; 1302 struct rdma_cm_event event; 1303 int offset, ret; 1304 1305 listen_id = cm_id->context; 1306 if (!cma_check_req_qp_type(&listen_id->id, ib_event)) 1307 return -EINVAL; 1308 1309 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN)) 1310 return -ECONNABORTED; 1311 1312 memset(&event, 0, sizeof event); 1313 offset = cma_user_data_offset(listen_id); 1314 event.event = RDMA_CM_EVENT_CONNECT_REQUEST; 1315 if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) { 1316 conn_id = cma_new_udp_id(&listen_id->id, ib_event); 1317 event.param.ud.private_data = ib_event->private_data + offset; 1318 event.param.ud.private_data_len = 1319 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset; 1320 } else { 1321 conn_id = cma_new_conn_id(&listen_id->id, ib_event); 1322 cma_set_req_event_data(&event, &ib_event->param.req_rcvd, 1323 ib_event->private_data, offset); 1324 } 1325 if (!conn_id) { 1326 ret = -ENOMEM; 1327 goto err1; 1328 } 1329 1330 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING); 1331 ret = cma_acquire_dev(conn_id, listen_id); 1332 if (ret) 1333 goto err2; 1334 1335 conn_id->cm_id.ib = cm_id; 1336 cm_id->context = conn_id; 1337 cm_id->cm_handler = cma_ib_handler; 1338 1339 /* 1340 * Protect against the user destroying conn_id from another thread 1341 * until we're done accessing it. 1342 */ 1343 atomic_inc(&conn_id->refcount); 1344 ret = conn_id->id.event_handler(&conn_id->id, &event); 1345 if (ret) 1346 goto err3; 1347 /* 1348 * Acquire mutex to prevent user executing rdma_destroy_id() 1349 * while we're accessing the cm_id. 1350 */ 1351 mutex_lock(&lock); 1352 if (cma_comp(conn_id, RDMA_CM_CONNECT) && 1353 (conn_id->id.qp_type != IB_QPT_UD)) 1354 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0); 1355 mutex_unlock(&lock); 1356 mutex_unlock(&conn_id->handler_mutex); 1357 mutex_unlock(&listen_id->handler_mutex); 1358 cma_deref_id(conn_id); 1359 return 0; 1360 1361 err3: 1362 cma_deref_id(conn_id); 1363 /* Destroy the CM ID by returning a non-zero value. */ 1364 conn_id->cm_id.ib = NULL; 1365 err2: 1366 cma_exch(conn_id, RDMA_CM_DESTROYING); 1367 mutex_unlock(&conn_id->handler_mutex); 1368 err1: 1369 mutex_unlock(&listen_id->handler_mutex); 1370 if (conn_id) 1371 rdma_destroy_id(&conn_id->id); 1372 return ret; 1373 } 1374 1375 __be64 rdma_get_service_id(struct rdma_cm_id *id, struct sockaddr *addr) 1376 { 1377 if (addr->sa_family == AF_IB) 1378 return ((struct sockaddr_ib *) addr)->sib_sid; 1379 1380 return cpu_to_be64(((u64)id->ps << 16) + be16_to_cpu(cma_port(addr))); 1381 } 1382 EXPORT_SYMBOL(rdma_get_service_id); 1383 1384 static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr, 1385 struct ib_cm_compare_data *compare) 1386 { 1387 struct cma_hdr *cma_data, *cma_mask; 1388 __be32 ip4_addr; 1389 struct in6_addr ip6_addr; 1390 1391 memset(compare, 0, sizeof *compare); 1392 cma_data = (void *) compare->data; 1393 cma_mask = (void *) compare->mask; 1394 1395 switch (addr->sa_family) { 1396 case AF_INET: 1397 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr; 1398 cma_set_ip_ver(cma_data, 4); 1399 cma_set_ip_ver(cma_mask, 0xF); 1400 if (!cma_any_addr(addr)) { 1401 cma_data->dst_addr.ip4.addr = ip4_addr; 1402 cma_mask->dst_addr.ip4.addr = htonl(~0); 1403 } 1404 break; 1405 case AF_INET6: 1406 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr; 1407 cma_set_ip_ver(cma_data, 6); 1408 cma_set_ip_ver(cma_mask, 0xF); 1409 if (!cma_any_addr(addr)) { 1410 cma_data->dst_addr.ip6 = ip6_addr; 1411 memset(&cma_mask->dst_addr.ip6, 0xFF, 1412 sizeof cma_mask->dst_addr.ip6); 1413 } 1414 break; 1415 default: 1416 break; 1417 } 1418 } 1419 1420 static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event) 1421 { 1422 struct rdma_id_private *id_priv = iw_id->context; 1423 struct rdma_cm_event event; 1424 int ret = 0; 1425 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr; 1426 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr; 1427 1428 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT)) 1429 return 0; 1430 1431 memset(&event, 0, sizeof event); 1432 switch (iw_event->event) { 1433 case IW_CM_EVENT_CLOSE: 1434 event.event = RDMA_CM_EVENT_DISCONNECTED; 1435 break; 1436 case IW_CM_EVENT_CONNECT_REPLY: 1437 memcpy(cma_src_addr(id_priv), laddr, 1438 rdma_addr_size(laddr)); 1439 memcpy(cma_dst_addr(id_priv), raddr, 1440 rdma_addr_size(raddr)); 1441 switch (iw_event->status) { 1442 case 0: 1443 event.event = RDMA_CM_EVENT_ESTABLISHED; 1444 event.param.conn.initiator_depth = iw_event->ird; 1445 event.param.conn.responder_resources = iw_event->ord; 1446 break; 1447 case -ECONNRESET: 1448 case -ECONNREFUSED: 1449 event.event = RDMA_CM_EVENT_REJECTED; 1450 break; 1451 case -ETIMEDOUT: 1452 event.event = RDMA_CM_EVENT_UNREACHABLE; 1453 break; 1454 default: 1455 event.event = RDMA_CM_EVENT_CONNECT_ERROR; 1456 break; 1457 } 1458 break; 1459 case IW_CM_EVENT_ESTABLISHED: 1460 event.event = RDMA_CM_EVENT_ESTABLISHED; 1461 event.param.conn.initiator_depth = iw_event->ird; 1462 event.param.conn.responder_resources = iw_event->ord; 1463 break; 1464 default: 1465 BUG_ON(1); 1466 } 1467 1468 event.status = iw_event->status; 1469 event.param.conn.private_data = iw_event->private_data; 1470 event.param.conn.private_data_len = iw_event->private_data_len; 1471 ret = id_priv->id.event_handler(&id_priv->id, &event); 1472 if (ret) { 1473 /* Destroy the CM ID by returning a non-zero value. */ 1474 id_priv->cm_id.iw = NULL; 1475 cma_exch(id_priv, RDMA_CM_DESTROYING); 1476 mutex_unlock(&id_priv->handler_mutex); 1477 rdma_destroy_id(&id_priv->id); 1478 return ret; 1479 } 1480 1481 mutex_unlock(&id_priv->handler_mutex); 1482 return ret; 1483 } 1484 1485 static int iw_conn_req_handler(struct iw_cm_id *cm_id, 1486 struct iw_cm_event *iw_event) 1487 { 1488 struct rdma_cm_id *new_cm_id; 1489 struct rdma_id_private *listen_id, *conn_id; 1490 struct rdma_cm_event event; 1491 int ret; 1492 struct ib_device_attr attr; 1493 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr; 1494 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr; 1495 1496 listen_id = cm_id->context; 1497 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN)) 1498 return -ECONNABORTED; 1499 1500 /* Create a new RDMA id for the new IW CM ID */ 1501 new_cm_id = rdma_create_id(listen_id->id.event_handler, 1502 listen_id->id.context, 1503 RDMA_PS_TCP, IB_QPT_RC); 1504 if (IS_ERR(new_cm_id)) { 1505 ret = -ENOMEM; 1506 goto out; 1507 } 1508 conn_id = container_of(new_cm_id, struct rdma_id_private, id); 1509 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING); 1510 conn_id->state = RDMA_CM_CONNECT; 1511 1512 ret = rdma_translate_ip(laddr, &conn_id->id.route.addr.dev_addr, NULL); 1513 if (ret) { 1514 mutex_unlock(&conn_id->handler_mutex); 1515 rdma_destroy_id(new_cm_id); 1516 goto out; 1517 } 1518 1519 ret = cma_acquire_dev(conn_id, listen_id); 1520 if (ret) { 1521 mutex_unlock(&conn_id->handler_mutex); 1522 rdma_destroy_id(new_cm_id); 1523 goto out; 1524 } 1525 1526 conn_id->cm_id.iw = cm_id; 1527 cm_id->context = conn_id; 1528 cm_id->cm_handler = cma_iw_handler; 1529 1530 memcpy(cma_src_addr(conn_id), laddr, rdma_addr_size(laddr)); 1531 memcpy(cma_dst_addr(conn_id), raddr, rdma_addr_size(raddr)); 1532 1533 ret = ib_query_device(conn_id->id.device, &attr); 1534 if (ret) { 1535 mutex_unlock(&conn_id->handler_mutex); 1536 rdma_destroy_id(new_cm_id); 1537 goto out; 1538 } 1539 1540 memset(&event, 0, sizeof event); 1541 event.event = RDMA_CM_EVENT_CONNECT_REQUEST; 1542 event.param.conn.private_data = iw_event->private_data; 1543 event.param.conn.private_data_len = iw_event->private_data_len; 1544 event.param.conn.initiator_depth = iw_event->ird; 1545 event.param.conn.responder_resources = iw_event->ord; 1546 1547 /* 1548 * Protect against the user destroying conn_id from another thread 1549 * until we're done accessing it. 1550 */ 1551 atomic_inc(&conn_id->refcount); 1552 ret = conn_id->id.event_handler(&conn_id->id, &event); 1553 if (ret) { 1554 /* User wants to destroy the CM ID */ 1555 conn_id->cm_id.iw = NULL; 1556 cma_exch(conn_id, RDMA_CM_DESTROYING); 1557 mutex_unlock(&conn_id->handler_mutex); 1558 cma_deref_id(conn_id); 1559 rdma_destroy_id(&conn_id->id); 1560 goto out; 1561 } 1562 1563 mutex_unlock(&conn_id->handler_mutex); 1564 cma_deref_id(conn_id); 1565 1566 out: 1567 mutex_unlock(&listen_id->handler_mutex); 1568 return ret; 1569 } 1570 1571 static int cma_ib_listen(struct rdma_id_private *id_priv) 1572 { 1573 struct ib_cm_compare_data compare_data; 1574 struct sockaddr *addr; 1575 struct ib_cm_id *id; 1576 __be64 svc_id; 1577 int ret; 1578 1579 id = ib_create_cm_id(id_priv->id.device, cma_req_handler, id_priv); 1580 if (IS_ERR(id)) 1581 return PTR_ERR(id); 1582 1583 id_priv->cm_id.ib = id; 1584 1585 addr = cma_src_addr(id_priv); 1586 svc_id = rdma_get_service_id(&id_priv->id, addr); 1587 if (cma_any_addr(addr) && !id_priv->afonly) 1588 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL); 1589 else { 1590 cma_set_compare_data(id_priv->id.ps, addr, &compare_data); 1591 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data); 1592 } 1593 1594 if (ret) { 1595 ib_destroy_cm_id(id_priv->cm_id.ib); 1596 id_priv->cm_id.ib = NULL; 1597 } 1598 1599 return ret; 1600 } 1601 1602 static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog) 1603 { 1604 int ret; 1605 struct iw_cm_id *id; 1606 1607 id = iw_create_cm_id(id_priv->id.device, 1608 iw_conn_req_handler, 1609 id_priv); 1610 if (IS_ERR(id)) 1611 return PTR_ERR(id); 1612 1613 id_priv->cm_id.iw = id; 1614 1615 memcpy(&id_priv->cm_id.iw->local_addr, cma_src_addr(id_priv), 1616 rdma_addr_size(cma_src_addr(id_priv))); 1617 1618 ret = iw_cm_listen(id_priv->cm_id.iw, backlog); 1619 1620 if (ret) { 1621 iw_destroy_cm_id(id_priv->cm_id.iw); 1622 id_priv->cm_id.iw = NULL; 1623 } 1624 1625 return ret; 1626 } 1627 1628 static int cma_listen_handler(struct rdma_cm_id *id, 1629 struct rdma_cm_event *event) 1630 { 1631 struct rdma_id_private *id_priv = id->context; 1632 1633 id->context = id_priv->id.context; 1634 id->event_handler = id_priv->id.event_handler; 1635 return id_priv->id.event_handler(id, event); 1636 } 1637 1638 static void cma_listen_on_dev(struct rdma_id_private *id_priv, 1639 struct cma_device *cma_dev) 1640 { 1641 struct rdma_id_private *dev_id_priv; 1642 struct rdma_cm_id *id; 1643 int ret; 1644 1645 if (cma_family(id_priv) == AF_IB && 1646 rdma_node_get_transport(cma_dev->device->node_type) != RDMA_TRANSPORT_IB) 1647 return; 1648 1649 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps, 1650 id_priv->id.qp_type); 1651 if (IS_ERR(id)) 1652 return; 1653 1654 dev_id_priv = container_of(id, struct rdma_id_private, id); 1655 1656 dev_id_priv->state = RDMA_CM_ADDR_BOUND; 1657 memcpy(cma_src_addr(dev_id_priv), cma_src_addr(id_priv), 1658 rdma_addr_size(cma_src_addr(id_priv))); 1659 1660 cma_attach_to_dev(dev_id_priv, cma_dev); 1661 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list); 1662 atomic_inc(&id_priv->refcount); 1663 dev_id_priv->internal_id = 1; 1664 dev_id_priv->afonly = id_priv->afonly; 1665 1666 ret = rdma_listen(id, id_priv->backlog); 1667 if (ret) 1668 printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, " 1669 "listening on device %s\n", ret, cma_dev->device->name); 1670 } 1671 1672 static void cma_listen_on_all(struct rdma_id_private *id_priv) 1673 { 1674 struct cma_device *cma_dev; 1675 1676 mutex_lock(&lock); 1677 list_add_tail(&id_priv->list, &listen_any_list); 1678 list_for_each_entry(cma_dev, &dev_list, list) 1679 cma_listen_on_dev(id_priv, cma_dev); 1680 mutex_unlock(&lock); 1681 } 1682 1683 void rdma_set_service_type(struct rdma_cm_id *id, int tos) 1684 { 1685 struct rdma_id_private *id_priv; 1686 1687 id_priv = container_of(id, struct rdma_id_private, id); 1688 id_priv->tos = (u8) tos; 1689 } 1690 EXPORT_SYMBOL(rdma_set_service_type); 1691 1692 static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec, 1693 void *context) 1694 { 1695 struct cma_work *work = context; 1696 struct rdma_route *route; 1697 1698 route = &work->id->id.route; 1699 1700 if (!status) { 1701 route->num_paths = 1; 1702 *route->path_rec = *path_rec; 1703 } else { 1704 work->old_state = RDMA_CM_ROUTE_QUERY; 1705 work->new_state = RDMA_CM_ADDR_RESOLVED; 1706 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR; 1707 work->event.status = status; 1708 } 1709 1710 queue_work(cma_wq, &work->work); 1711 } 1712 1713 static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms, 1714 struct cma_work *work) 1715 { 1716 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 1717 struct ib_sa_path_rec path_rec; 1718 ib_sa_comp_mask comp_mask; 1719 struct sockaddr_in6 *sin6; 1720 struct sockaddr_ib *sib; 1721 1722 memset(&path_rec, 0, sizeof path_rec); 1723 rdma_addr_get_sgid(dev_addr, &path_rec.sgid); 1724 rdma_addr_get_dgid(dev_addr, &path_rec.dgid); 1725 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); 1726 path_rec.numb_path = 1; 1727 path_rec.reversible = 1; 1728 path_rec.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv)); 1729 1730 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID | 1731 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH | 1732 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID; 1733 1734 switch (cma_family(id_priv)) { 1735 case AF_INET: 1736 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos); 1737 comp_mask |= IB_SA_PATH_REC_QOS_CLASS; 1738 break; 1739 case AF_INET6: 1740 sin6 = (struct sockaddr_in6 *) cma_src_addr(id_priv); 1741 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20); 1742 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS; 1743 break; 1744 case AF_IB: 1745 sib = (struct sockaddr_ib *) cma_src_addr(id_priv); 1746 path_rec.traffic_class = (u8) (be32_to_cpu(sib->sib_flowinfo) >> 20); 1747 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS; 1748 break; 1749 } 1750 1751 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device, 1752 id_priv->id.port_num, &path_rec, 1753 comp_mask, timeout_ms, 1754 GFP_KERNEL, cma_query_handler, 1755 work, &id_priv->query); 1756 1757 return (id_priv->query_id < 0) ? id_priv->query_id : 0; 1758 } 1759 1760 static void cma_work_handler(struct work_struct *_work) 1761 { 1762 struct cma_work *work = container_of(_work, struct cma_work, work); 1763 struct rdma_id_private *id_priv = work->id; 1764 int destroy = 0; 1765 1766 mutex_lock(&id_priv->handler_mutex); 1767 if (!cma_comp_exch(id_priv, work->old_state, work->new_state)) 1768 goto out; 1769 1770 if (id_priv->id.event_handler(&id_priv->id, &work->event)) { 1771 cma_exch(id_priv, RDMA_CM_DESTROYING); 1772 destroy = 1; 1773 } 1774 out: 1775 mutex_unlock(&id_priv->handler_mutex); 1776 cma_deref_id(id_priv); 1777 if (destroy) 1778 rdma_destroy_id(&id_priv->id); 1779 kfree(work); 1780 } 1781 1782 static void cma_ndev_work_handler(struct work_struct *_work) 1783 { 1784 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work); 1785 struct rdma_id_private *id_priv = work->id; 1786 int destroy = 0; 1787 1788 mutex_lock(&id_priv->handler_mutex); 1789 if (id_priv->state == RDMA_CM_DESTROYING || 1790 id_priv->state == RDMA_CM_DEVICE_REMOVAL) 1791 goto out; 1792 1793 if (id_priv->id.event_handler(&id_priv->id, &work->event)) { 1794 cma_exch(id_priv, RDMA_CM_DESTROYING); 1795 destroy = 1; 1796 } 1797 1798 out: 1799 mutex_unlock(&id_priv->handler_mutex); 1800 cma_deref_id(id_priv); 1801 if (destroy) 1802 rdma_destroy_id(&id_priv->id); 1803 kfree(work); 1804 } 1805 1806 static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms) 1807 { 1808 struct rdma_route *route = &id_priv->id.route; 1809 struct cma_work *work; 1810 int ret; 1811 1812 work = kzalloc(sizeof *work, GFP_KERNEL); 1813 if (!work) 1814 return -ENOMEM; 1815 1816 work->id = id_priv; 1817 INIT_WORK(&work->work, cma_work_handler); 1818 work->old_state = RDMA_CM_ROUTE_QUERY; 1819 work->new_state = RDMA_CM_ROUTE_RESOLVED; 1820 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 1821 1822 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL); 1823 if (!route->path_rec) { 1824 ret = -ENOMEM; 1825 goto err1; 1826 } 1827 1828 ret = cma_query_ib_route(id_priv, timeout_ms, work); 1829 if (ret) 1830 goto err2; 1831 1832 return 0; 1833 err2: 1834 kfree(route->path_rec); 1835 route->path_rec = NULL; 1836 err1: 1837 kfree(work); 1838 return ret; 1839 } 1840 1841 int rdma_set_ib_paths(struct rdma_cm_id *id, 1842 struct ib_sa_path_rec *path_rec, int num_paths) 1843 { 1844 struct rdma_id_private *id_priv; 1845 int ret; 1846 1847 id_priv = container_of(id, struct rdma_id_private, id); 1848 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, 1849 RDMA_CM_ROUTE_RESOLVED)) 1850 return -EINVAL; 1851 1852 id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths, 1853 GFP_KERNEL); 1854 if (!id->route.path_rec) { 1855 ret = -ENOMEM; 1856 goto err; 1857 } 1858 1859 id->route.num_paths = num_paths; 1860 return 0; 1861 err: 1862 cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED); 1863 return ret; 1864 } 1865 EXPORT_SYMBOL(rdma_set_ib_paths); 1866 1867 static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms) 1868 { 1869 struct cma_work *work; 1870 1871 work = kzalloc(sizeof *work, GFP_KERNEL); 1872 if (!work) 1873 return -ENOMEM; 1874 1875 work->id = id_priv; 1876 INIT_WORK(&work->work, cma_work_handler); 1877 work->old_state = RDMA_CM_ROUTE_QUERY; 1878 work->new_state = RDMA_CM_ROUTE_RESOLVED; 1879 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 1880 queue_work(cma_wq, &work->work); 1881 return 0; 1882 } 1883 1884 static int iboe_tos_to_sl(struct net_device *ndev, int tos) 1885 { 1886 int prio; 1887 struct net_device *dev; 1888 1889 prio = rt_tos2priority(tos); 1890 dev = ndev->priv_flags & IFF_802_1Q_VLAN ? 1891 vlan_dev_real_dev(ndev) : ndev; 1892 1893 if (dev->num_tc) 1894 return netdev_get_prio_tc_map(dev, prio); 1895 1896 #if IS_ENABLED(CONFIG_VLAN_8021Q) 1897 if (ndev->priv_flags & IFF_802_1Q_VLAN) 1898 return (vlan_dev_get_egress_qos_mask(ndev, prio) & 1899 VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT; 1900 #endif 1901 return 0; 1902 } 1903 1904 static int cma_resolve_iboe_route(struct rdma_id_private *id_priv) 1905 { 1906 struct rdma_route *route = &id_priv->id.route; 1907 struct rdma_addr *addr = &route->addr; 1908 struct cma_work *work; 1909 int ret; 1910 struct net_device *ndev = NULL; 1911 1912 1913 work = kzalloc(sizeof *work, GFP_KERNEL); 1914 if (!work) 1915 return -ENOMEM; 1916 1917 work->id = id_priv; 1918 INIT_WORK(&work->work, cma_work_handler); 1919 1920 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL); 1921 if (!route->path_rec) { 1922 ret = -ENOMEM; 1923 goto err1; 1924 } 1925 1926 route->num_paths = 1; 1927 1928 if (addr->dev_addr.bound_dev_if) 1929 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if); 1930 if (!ndev) { 1931 ret = -ENODEV; 1932 goto err2; 1933 } 1934 1935 route->path_rec->vlan_id = rdma_vlan_dev_vlan_id(ndev); 1936 memcpy(route->path_rec->dmac, addr->dev_addr.dst_dev_addr, ETH_ALEN); 1937 memcpy(route->path_rec->smac, ndev->dev_addr, ndev->addr_len); 1938 1939 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr, 1940 &route->path_rec->sgid); 1941 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.dst_addr, 1942 &route->path_rec->dgid); 1943 1944 route->path_rec->hop_limit = 1; 1945 route->path_rec->reversible = 1; 1946 route->path_rec->pkey = cpu_to_be16(0xffff); 1947 route->path_rec->mtu_selector = IB_SA_EQ; 1948 route->path_rec->sl = iboe_tos_to_sl(ndev, id_priv->tos); 1949 route->path_rec->mtu = iboe_get_mtu(ndev->mtu); 1950 route->path_rec->rate_selector = IB_SA_EQ; 1951 route->path_rec->rate = iboe_get_rate(ndev); 1952 dev_put(ndev); 1953 route->path_rec->packet_life_time_selector = IB_SA_EQ; 1954 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME; 1955 if (!route->path_rec->mtu) { 1956 ret = -EINVAL; 1957 goto err2; 1958 } 1959 1960 work->old_state = RDMA_CM_ROUTE_QUERY; 1961 work->new_state = RDMA_CM_ROUTE_RESOLVED; 1962 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 1963 work->event.status = 0; 1964 1965 queue_work(cma_wq, &work->work); 1966 1967 return 0; 1968 1969 err2: 1970 kfree(route->path_rec); 1971 route->path_rec = NULL; 1972 err1: 1973 kfree(work); 1974 return ret; 1975 } 1976 1977 int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms) 1978 { 1979 struct rdma_id_private *id_priv; 1980 int ret; 1981 1982 id_priv = container_of(id, struct rdma_id_private, id); 1983 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY)) 1984 return -EINVAL; 1985 1986 atomic_inc(&id_priv->refcount); 1987 switch (rdma_node_get_transport(id->device->node_type)) { 1988 case RDMA_TRANSPORT_IB: 1989 switch (rdma_port_get_link_layer(id->device, id->port_num)) { 1990 case IB_LINK_LAYER_INFINIBAND: 1991 ret = cma_resolve_ib_route(id_priv, timeout_ms); 1992 break; 1993 case IB_LINK_LAYER_ETHERNET: 1994 ret = cma_resolve_iboe_route(id_priv); 1995 break; 1996 default: 1997 ret = -ENOSYS; 1998 } 1999 break; 2000 case RDMA_TRANSPORT_IWARP: 2001 ret = cma_resolve_iw_route(id_priv, timeout_ms); 2002 break; 2003 default: 2004 ret = -ENOSYS; 2005 break; 2006 } 2007 if (ret) 2008 goto err; 2009 2010 return 0; 2011 err: 2012 cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED); 2013 cma_deref_id(id_priv); 2014 return ret; 2015 } 2016 EXPORT_SYMBOL(rdma_resolve_route); 2017 2018 static void cma_set_loopback(struct sockaddr *addr) 2019 { 2020 switch (addr->sa_family) { 2021 case AF_INET: 2022 ((struct sockaddr_in *) addr)->sin_addr.s_addr = htonl(INADDR_LOOPBACK); 2023 break; 2024 case AF_INET6: 2025 ipv6_addr_set(&((struct sockaddr_in6 *) addr)->sin6_addr, 2026 0, 0, 0, htonl(1)); 2027 break; 2028 default: 2029 ib_addr_set(&((struct sockaddr_ib *) addr)->sib_addr, 2030 0, 0, 0, htonl(1)); 2031 break; 2032 } 2033 } 2034 2035 static int cma_bind_loopback(struct rdma_id_private *id_priv) 2036 { 2037 struct cma_device *cma_dev, *cur_dev; 2038 struct ib_port_attr port_attr; 2039 union ib_gid gid; 2040 u16 pkey; 2041 int ret; 2042 u8 p; 2043 2044 cma_dev = NULL; 2045 mutex_lock(&lock); 2046 list_for_each_entry(cur_dev, &dev_list, list) { 2047 if (cma_family(id_priv) == AF_IB && 2048 rdma_node_get_transport(cur_dev->device->node_type) != RDMA_TRANSPORT_IB) 2049 continue; 2050 2051 if (!cma_dev) 2052 cma_dev = cur_dev; 2053 2054 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) { 2055 if (!ib_query_port(cur_dev->device, p, &port_attr) && 2056 port_attr.state == IB_PORT_ACTIVE) { 2057 cma_dev = cur_dev; 2058 goto port_found; 2059 } 2060 } 2061 } 2062 2063 if (!cma_dev) { 2064 ret = -ENODEV; 2065 goto out; 2066 } 2067 2068 p = 1; 2069 2070 port_found: 2071 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid); 2072 if (ret) 2073 goto out; 2074 2075 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey); 2076 if (ret) 2077 goto out; 2078 2079 id_priv->id.route.addr.dev_addr.dev_type = 2080 (rdma_port_get_link_layer(cma_dev->device, p) == IB_LINK_LAYER_INFINIBAND) ? 2081 ARPHRD_INFINIBAND : ARPHRD_ETHER; 2082 2083 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid); 2084 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey); 2085 id_priv->id.port_num = p; 2086 cma_attach_to_dev(id_priv, cma_dev); 2087 cma_set_loopback(cma_src_addr(id_priv)); 2088 out: 2089 mutex_unlock(&lock); 2090 return ret; 2091 } 2092 2093 static void addr_handler(int status, struct sockaddr *src_addr, 2094 struct rdma_dev_addr *dev_addr, void *context) 2095 { 2096 struct rdma_id_private *id_priv = context; 2097 struct rdma_cm_event event; 2098 2099 memset(&event, 0, sizeof event); 2100 mutex_lock(&id_priv->handler_mutex); 2101 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, 2102 RDMA_CM_ADDR_RESOLVED)) 2103 goto out; 2104 2105 memcpy(cma_src_addr(id_priv), src_addr, rdma_addr_size(src_addr)); 2106 if (!status && !id_priv->cma_dev) 2107 status = cma_acquire_dev(id_priv, NULL); 2108 2109 if (status) { 2110 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, 2111 RDMA_CM_ADDR_BOUND)) 2112 goto out; 2113 event.event = RDMA_CM_EVENT_ADDR_ERROR; 2114 event.status = status; 2115 } else 2116 event.event = RDMA_CM_EVENT_ADDR_RESOLVED; 2117 2118 if (id_priv->id.event_handler(&id_priv->id, &event)) { 2119 cma_exch(id_priv, RDMA_CM_DESTROYING); 2120 mutex_unlock(&id_priv->handler_mutex); 2121 cma_deref_id(id_priv); 2122 rdma_destroy_id(&id_priv->id); 2123 return; 2124 } 2125 out: 2126 mutex_unlock(&id_priv->handler_mutex); 2127 cma_deref_id(id_priv); 2128 } 2129 2130 static int cma_resolve_loopback(struct rdma_id_private *id_priv) 2131 { 2132 struct cma_work *work; 2133 union ib_gid gid; 2134 int ret; 2135 2136 work = kzalloc(sizeof *work, GFP_KERNEL); 2137 if (!work) 2138 return -ENOMEM; 2139 2140 if (!id_priv->cma_dev) { 2141 ret = cma_bind_loopback(id_priv); 2142 if (ret) 2143 goto err; 2144 } 2145 2146 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid); 2147 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid); 2148 2149 work->id = id_priv; 2150 INIT_WORK(&work->work, cma_work_handler); 2151 work->old_state = RDMA_CM_ADDR_QUERY; 2152 work->new_state = RDMA_CM_ADDR_RESOLVED; 2153 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED; 2154 queue_work(cma_wq, &work->work); 2155 return 0; 2156 err: 2157 kfree(work); 2158 return ret; 2159 } 2160 2161 static int cma_resolve_ib_addr(struct rdma_id_private *id_priv) 2162 { 2163 struct cma_work *work; 2164 int ret; 2165 2166 work = kzalloc(sizeof *work, GFP_KERNEL); 2167 if (!work) 2168 return -ENOMEM; 2169 2170 if (!id_priv->cma_dev) { 2171 ret = cma_resolve_ib_dev(id_priv); 2172 if (ret) 2173 goto err; 2174 } 2175 2176 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, (union ib_gid *) 2177 &(((struct sockaddr_ib *) &id_priv->id.route.addr.dst_addr)->sib_addr)); 2178 2179 work->id = id_priv; 2180 INIT_WORK(&work->work, cma_work_handler); 2181 work->old_state = RDMA_CM_ADDR_QUERY; 2182 work->new_state = RDMA_CM_ADDR_RESOLVED; 2183 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED; 2184 queue_work(cma_wq, &work->work); 2185 return 0; 2186 err: 2187 kfree(work); 2188 return ret; 2189 } 2190 2191 static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, 2192 struct sockaddr *dst_addr) 2193 { 2194 if (!src_addr || !src_addr->sa_family) { 2195 src_addr = (struct sockaddr *) &id->route.addr.src_addr; 2196 src_addr->sa_family = dst_addr->sa_family; 2197 if (dst_addr->sa_family == AF_INET6) { 2198 ((struct sockaddr_in6 *) src_addr)->sin6_scope_id = 2199 ((struct sockaddr_in6 *) dst_addr)->sin6_scope_id; 2200 } else if (dst_addr->sa_family == AF_IB) { 2201 ((struct sockaddr_ib *) src_addr)->sib_pkey = 2202 ((struct sockaddr_ib *) dst_addr)->sib_pkey; 2203 } 2204 } 2205 return rdma_bind_addr(id, src_addr); 2206 } 2207 2208 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, 2209 struct sockaddr *dst_addr, int timeout_ms) 2210 { 2211 struct rdma_id_private *id_priv; 2212 int ret; 2213 2214 id_priv = container_of(id, struct rdma_id_private, id); 2215 if (id_priv->state == RDMA_CM_IDLE) { 2216 ret = cma_bind_addr(id, src_addr, dst_addr); 2217 if (ret) 2218 return ret; 2219 } 2220 2221 if (cma_family(id_priv) != dst_addr->sa_family) 2222 return -EINVAL; 2223 2224 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY)) 2225 return -EINVAL; 2226 2227 atomic_inc(&id_priv->refcount); 2228 memcpy(cma_dst_addr(id_priv), dst_addr, rdma_addr_size(dst_addr)); 2229 if (cma_any_addr(dst_addr)) { 2230 ret = cma_resolve_loopback(id_priv); 2231 } else { 2232 if (dst_addr->sa_family == AF_IB) { 2233 ret = cma_resolve_ib_addr(id_priv); 2234 } else { 2235 ret = rdma_resolve_ip(&addr_client, cma_src_addr(id_priv), 2236 dst_addr, &id->route.addr.dev_addr, 2237 timeout_ms, addr_handler, id_priv); 2238 } 2239 } 2240 if (ret) 2241 goto err; 2242 2243 return 0; 2244 err: 2245 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND); 2246 cma_deref_id(id_priv); 2247 return ret; 2248 } 2249 EXPORT_SYMBOL(rdma_resolve_addr); 2250 2251 int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse) 2252 { 2253 struct rdma_id_private *id_priv; 2254 unsigned long flags; 2255 int ret; 2256 2257 id_priv = container_of(id, struct rdma_id_private, id); 2258 spin_lock_irqsave(&id_priv->lock, flags); 2259 if (reuse || id_priv->state == RDMA_CM_IDLE) { 2260 id_priv->reuseaddr = reuse; 2261 ret = 0; 2262 } else { 2263 ret = -EINVAL; 2264 } 2265 spin_unlock_irqrestore(&id_priv->lock, flags); 2266 return ret; 2267 } 2268 EXPORT_SYMBOL(rdma_set_reuseaddr); 2269 2270 int rdma_set_afonly(struct rdma_cm_id *id, int afonly) 2271 { 2272 struct rdma_id_private *id_priv; 2273 unsigned long flags; 2274 int ret; 2275 2276 id_priv = container_of(id, struct rdma_id_private, id); 2277 spin_lock_irqsave(&id_priv->lock, flags); 2278 if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) { 2279 id_priv->options |= (1 << CMA_OPTION_AFONLY); 2280 id_priv->afonly = afonly; 2281 ret = 0; 2282 } else { 2283 ret = -EINVAL; 2284 } 2285 spin_unlock_irqrestore(&id_priv->lock, flags); 2286 return ret; 2287 } 2288 EXPORT_SYMBOL(rdma_set_afonly); 2289 2290 static void cma_bind_port(struct rdma_bind_list *bind_list, 2291 struct rdma_id_private *id_priv) 2292 { 2293 struct sockaddr *addr; 2294 struct sockaddr_ib *sib; 2295 u64 sid, mask; 2296 __be16 port; 2297 2298 addr = cma_src_addr(id_priv); 2299 port = htons(bind_list->port); 2300 2301 switch (addr->sa_family) { 2302 case AF_INET: 2303 ((struct sockaddr_in *) addr)->sin_port = port; 2304 break; 2305 case AF_INET6: 2306 ((struct sockaddr_in6 *) addr)->sin6_port = port; 2307 break; 2308 case AF_IB: 2309 sib = (struct sockaddr_ib *) addr; 2310 sid = be64_to_cpu(sib->sib_sid); 2311 mask = be64_to_cpu(sib->sib_sid_mask); 2312 sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port)); 2313 sib->sib_sid_mask = cpu_to_be64(~0ULL); 2314 break; 2315 } 2316 id_priv->bind_list = bind_list; 2317 hlist_add_head(&id_priv->node, &bind_list->owners); 2318 } 2319 2320 static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv, 2321 unsigned short snum) 2322 { 2323 struct rdma_bind_list *bind_list; 2324 int ret; 2325 2326 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL); 2327 if (!bind_list) 2328 return -ENOMEM; 2329 2330 ret = idr_alloc(ps, bind_list, snum, snum + 1, GFP_KERNEL); 2331 if (ret < 0) 2332 goto err; 2333 2334 bind_list->ps = ps; 2335 bind_list->port = (unsigned short)ret; 2336 cma_bind_port(bind_list, id_priv); 2337 return 0; 2338 err: 2339 kfree(bind_list); 2340 return ret == -ENOSPC ? -EADDRNOTAVAIL : ret; 2341 } 2342 2343 static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv) 2344 { 2345 static unsigned int last_used_port; 2346 int low, high, remaining; 2347 unsigned int rover; 2348 2349 inet_get_local_port_range(&init_net, &low, &high); 2350 remaining = (high - low) + 1; 2351 rover = prandom_u32() % remaining + low; 2352 retry: 2353 if (last_used_port != rover && 2354 !idr_find(ps, (unsigned short) rover)) { 2355 int ret = cma_alloc_port(ps, id_priv, rover); 2356 /* 2357 * Remember previously used port number in order to avoid 2358 * re-using same port immediately after it is closed. 2359 */ 2360 if (!ret) 2361 last_used_port = rover; 2362 if (ret != -EADDRNOTAVAIL) 2363 return ret; 2364 } 2365 if (--remaining) { 2366 rover++; 2367 if ((rover < low) || (rover > high)) 2368 rover = low; 2369 goto retry; 2370 } 2371 return -EADDRNOTAVAIL; 2372 } 2373 2374 /* 2375 * Check that the requested port is available. This is called when trying to 2376 * bind to a specific port, or when trying to listen on a bound port. In 2377 * the latter case, the provided id_priv may already be on the bind_list, but 2378 * we still need to check that it's okay to start listening. 2379 */ 2380 static int cma_check_port(struct rdma_bind_list *bind_list, 2381 struct rdma_id_private *id_priv, uint8_t reuseaddr) 2382 { 2383 struct rdma_id_private *cur_id; 2384 struct sockaddr *addr, *cur_addr; 2385 2386 addr = cma_src_addr(id_priv); 2387 hlist_for_each_entry(cur_id, &bind_list->owners, node) { 2388 if (id_priv == cur_id) 2389 continue; 2390 2391 if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr && 2392 cur_id->reuseaddr) 2393 continue; 2394 2395 cur_addr = cma_src_addr(cur_id); 2396 if (id_priv->afonly && cur_id->afonly && 2397 (addr->sa_family != cur_addr->sa_family)) 2398 continue; 2399 2400 if (cma_any_addr(addr) || cma_any_addr(cur_addr)) 2401 return -EADDRNOTAVAIL; 2402 2403 if (!cma_addr_cmp(addr, cur_addr)) 2404 return -EADDRINUSE; 2405 } 2406 return 0; 2407 } 2408 2409 static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv) 2410 { 2411 struct rdma_bind_list *bind_list; 2412 unsigned short snum; 2413 int ret; 2414 2415 snum = ntohs(cma_port(cma_src_addr(id_priv))); 2416 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE)) 2417 return -EACCES; 2418 2419 bind_list = idr_find(ps, snum); 2420 if (!bind_list) { 2421 ret = cma_alloc_port(ps, id_priv, snum); 2422 } else { 2423 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr); 2424 if (!ret) 2425 cma_bind_port(bind_list, id_priv); 2426 } 2427 return ret; 2428 } 2429 2430 static int cma_bind_listen(struct rdma_id_private *id_priv) 2431 { 2432 struct rdma_bind_list *bind_list = id_priv->bind_list; 2433 int ret = 0; 2434 2435 mutex_lock(&lock); 2436 if (bind_list->owners.first->next) 2437 ret = cma_check_port(bind_list, id_priv, 0); 2438 mutex_unlock(&lock); 2439 return ret; 2440 } 2441 2442 static struct idr *cma_select_inet_ps(struct rdma_id_private *id_priv) 2443 { 2444 switch (id_priv->id.ps) { 2445 case RDMA_PS_TCP: 2446 return &tcp_ps; 2447 case RDMA_PS_UDP: 2448 return &udp_ps; 2449 case RDMA_PS_IPOIB: 2450 return &ipoib_ps; 2451 case RDMA_PS_IB: 2452 return &ib_ps; 2453 default: 2454 return NULL; 2455 } 2456 } 2457 2458 static struct idr *cma_select_ib_ps(struct rdma_id_private *id_priv) 2459 { 2460 struct idr *ps = NULL; 2461 struct sockaddr_ib *sib; 2462 u64 sid_ps, mask, sid; 2463 2464 sib = (struct sockaddr_ib *) cma_src_addr(id_priv); 2465 mask = be64_to_cpu(sib->sib_sid_mask) & RDMA_IB_IP_PS_MASK; 2466 sid = be64_to_cpu(sib->sib_sid) & mask; 2467 2468 if ((id_priv->id.ps == RDMA_PS_IB) && (sid == (RDMA_IB_IP_PS_IB & mask))) { 2469 sid_ps = RDMA_IB_IP_PS_IB; 2470 ps = &ib_ps; 2471 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_TCP)) && 2472 (sid == (RDMA_IB_IP_PS_TCP & mask))) { 2473 sid_ps = RDMA_IB_IP_PS_TCP; 2474 ps = &tcp_ps; 2475 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_UDP)) && 2476 (sid == (RDMA_IB_IP_PS_UDP & mask))) { 2477 sid_ps = RDMA_IB_IP_PS_UDP; 2478 ps = &udp_ps; 2479 } 2480 2481 if (ps) { 2482 sib->sib_sid = cpu_to_be64(sid_ps | ntohs(cma_port((struct sockaddr *) sib))); 2483 sib->sib_sid_mask = cpu_to_be64(RDMA_IB_IP_PS_MASK | 2484 be64_to_cpu(sib->sib_sid_mask)); 2485 } 2486 return ps; 2487 } 2488 2489 static int cma_get_port(struct rdma_id_private *id_priv) 2490 { 2491 struct idr *ps; 2492 int ret; 2493 2494 if (cma_family(id_priv) != AF_IB) 2495 ps = cma_select_inet_ps(id_priv); 2496 else 2497 ps = cma_select_ib_ps(id_priv); 2498 if (!ps) 2499 return -EPROTONOSUPPORT; 2500 2501 mutex_lock(&lock); 2502 if (cma_any_port(cma_src_addr(id_priv))) 2503 ret = cma_alloc_any_port(ps, id_priv); 2504 else 2505 ret = cma_use_port(ps, id_priv); 2506 mutex_unlock(&lock); 2507 2508 return ret; 2509 } 2510 2511 static int cma_check_linklocal(struct rdma_dev_addr *dev_addr, 2512 struct sockaddr *addr) 2513 { 2514 #if IS_ENABLED(CONFIG_IPV6) 2515 struct sockaddr_in6 *sin6; 2516 2517 if (addr->sa_family != AF_INET6) 2518 return 0; 2519 2520 sin6 = (struct sockaddr_in6 *) addr; 2521 2522 if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)) 2523 return 0; 2524 2525 if (!sin6->sin6_scope_id) 2526 return -EINVAL; 2527 2528 dev_addr->bound_dev_if = sin6->sin6_scope_id; 2529 #endif 2530 return 0; 2531 } 2532 2533 int rdma_listen(struct rdma_cm_id *id, int backlog) 2534 { 2535 struct rdma_id_private *id_priv; 2536 int ret; 2537 2538 id_priv = container_of(id, struct rdma_id_private, id); 2539 if (id_priv->state == RDMA_CM_IDLE) { 2540 id->route.addr.src_addr.ss_family = AF_INET; 2541 ret = rdma_bind_addr(id, cma_src_addr(id_priv)); 2542 if (ret) 2543 return ret; 2544 } 2545 2546 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN)) 2547 return -EINVAL; 2548 2549 if (id_priv->reuseaddr) { 2550 ret = cma_bind_listen(id_priv); 2551 if (ret) 2552 goto err; 2553 } 2554 2555 id_priv->backlog = backlog; 2556 if (id->device) { 2557 switch (rdma_node_get_transport(id->device->node_type)) { 2558 case RDMA_TRANSPORT_IB: 2559 ret = cma_ib_listen(id_priv); 2560 if (ret) 2561 goto err; 2562 break; 2563 case RDMA_TRANSPORT_IWARP: 2564 ret = cma_iw_listen(id_priv, backlog); 2565 if (ret) 2566 goto err; 2567 break; 2568 default: 2569 ret = -ENOSYS; 2570 goto err; 2571 } 2572 } else 2573 cma_listen_on_all(id_priv); 2574 2575 return 0; 2576 err: 2577 id_priv->backlog = 0; 2578 cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND); 2579 return ret; 2580 } 2581 EXPORT_SYMBOL(rdma_listen); 2582 2583 int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr) 2584 { 2585 struct rdma_id_private *id_priv; 2586 int ret; 2587 2588 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6 && 2589 addr->sa_family != AF_IB) 2590 return -EAFNOSUPPORT; 2591 2592 id_priv = container_of(id, struct rdma_id_private, id); 2593 if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND)) 2594 return -EINVAL; 2595 2596 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr); 2597 if (ret) 2598 goto err1; 2599 2600 memcpy(cma_src_addr(id_priv), addr, rdma_addr_size(addr)); 2601 if (!cma_any_addr(addr)) { 2602 ret = cma_translate_addr(addr, &id->route.addr.dev_addr); 2603 if (ret) 2604 goto err1; 2605 2606 ret = cma_acquire_dev(id_priv, NULL); 2607 if (ret) 2608 goto err1; 2609 } 2610 2611 if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) { 2612 if (addr->sa_family == AF_INET) 2613 id_priv->afonly = 1; 2614 #if IS_ENABLED(CONFIG_IPV6) 2615 else if (addr->sa_family == AF_INET6) 2616 id_priv->afonly = init_net.ipv6.sysctl.bindv6only; 2617 #endif 2618 } 2619 ret = cma_get_port(id_priv); 2620 if (ret) 2621 goto err2; 2622 2623 return 0; 2624 err2: 2625 if (id_priv->cma_dev) 2626 cma_release_dev(id_priv); 2627 err1: 2628 cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE); 2629 return ret; 2630 } 2631 EXPORT_SYMBOL(rdma_bind_addr); 2632 2633 static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv) 2634 { 2635 struct cma_hdr *cma_hdr; 2636 2637 cma_hdr = hdr; 2638 cma_hdr->cma_version = CMA_VERSION; 2639 if (cma_family(id_priv) == AF_INET) { 2640 struct sockaddr_in *src4, *dst4; 2641 2642 src4 = (struct sockaddr_in *) cma_src_addr(id_priv); 2643 dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv); 2644 2645 cma_set_ip_ver(cma_hdr, 4); 2646 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; 2647 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; 2648 cma_hdr->port = src4->sin_port; 2649 } else if (cma_family(id_priv) == AF_INET6) { 2650 struct sockaddr_in6 *src6, *dst6; 2651 2652 src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv); 2653 dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv); 2654 2655 cma_set_ip_ver(cma_hdr, 6); 2656 cma_hdr->src_addr.ip6 = src6->sin6_addr; 2657 cma_hdr->dst_addr.ip6 = dst6->sin6_addr; 2658 cma_hdr->port = src6->sin6_port; 2659 } 2660 return 0; 2661 } 2662 2663 static int cma_sidr_rep_handler(struct ib_cm_id *cm_id, 2664 struct ib_cm_event *ib_event) 2665 { 2666 struct rdma_id_private *id_priv = cm_id->context; 2667 struct rdma_cm_event event; 2668 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd; 2669 int ret = 0; 2670 2671 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT)) 2672 return 0; 2673 2674 memset(&event, 0, sizeof event); 2675 switch (ib_event->event) { 2676 case IB_CM_SIDR_REQ_ERROR: 2677 event.event = RDMA_CM_EVENT_UNREACHABLE; 2678 event.status = -ETIMEDOUT; 2679 break; 2680 case IB_CM_SIDR_REP_RECEIVED: 2681 event.param.ud.private_data = ib_event->private_data; 2682 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE; 2683 if (rep->status != IB_SIDR_SUCCESS) { 2684 event.event = RDMA_CM_EVENT_UNREACHABLE; 2685 event.status = ib_event->param.sidr_rep_rcvd.status; 2686 break; 2687 } 2688 ret = cma_set_qkey(id_priv, rep->qkey); 2689 if (ret) { 2690 event.event = RDMA_CM_EVENT_ADDR_ERROR; 2691 event.status = ret; 2692 break; 2693 } 2694 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num, 2695 id_priv->id.route.path_rec, 2696 &event.param.ud.ah_attr); 2697 event.param.ud.qp_num = rep->qpn; 2698 event.param.ud.qkey = rep->qkey; 2699 event.event = RDMA_CM_EVENT_ESTABLISHED; 2700 event.status = 0; 2701 break; 2702 default: 2703 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n", 2704 ib_event->event); 2705 goto out; 2706 } 2707 2708 ret = id_priv->id.event_handler(&id_priv->id, &event); 2709 if (ret) { 2710 /* Destroy the CM ID by returning a non-zero value. */ 2711 id_priv->cm_id.ib = NULL; 2712 cma_exch(id_priv, RDMA_CM_DESTROYING); 2713 mutex_unlock(&id_priv->handler_mutex); 2714 rdma_destroy_id(&id_priv->id); 2715 return ret; 2716 } 2717 out: 2718 mutex_unlock(&id_priv->handler_mutex); 2719 return ret; 2720 } 2721 2722 static int cma_resolve_ib_udp(struct rdma_id_private *id_priv, 2723 struct rdma_conn_param *conn_param) 2724 { 2725 struct ib_cm_sidr_req_param req; 2726 struct ib_cm_id *id; 2727 void *private_data; 2728 int offset, ret; 2729 2730 memset(&req, 0, sizeof req); 2731 offset = cma_user_data_offset(id_priv); 2732 req.private_data_len = offset + conn_param->private_data_len; 2733 if (req.private_data_len < conn_param->private_data_len) 2734 return -EINVAL; 2735 2736 if (req.private_data_len) { 2737 private_data = kzalloc(req.private_data_len, GFP_ATOMIC); 2738 if (!private_data) 2739 return -ENOMEM; 2740 } else { 2741 private_data = NULL; 2742 } 2743 2744 if (conn_param->private_data && conn_param->private_data_len) 2745 memcpy(private_data + offset, conn_param->private_data, 2746 conn_param->private_data_len); 2747 2748 if (private_data) { 2749 ret = cma_format_hdr(private_data, id_priv); 2750 if (ret) 2751 goto out; 2752 req.private_data = private_data; 2753 } 2754 2755 id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler, 2756 id_priv); 2757 if (IS_ERR(id)) { 2758 ret = PTR_ERR(id); 2759 goto out; 2760 } 2761 id_priv->cm_id.ib = id; 2762 2763 req.path = id_priv->id.route.path_rec; 2764 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv)); 2765 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8); 2766 req.max_cm_retries = CMA_MAX_CM_RETRIES; 2767 2768 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req); 2769 if (ret) { 2770 ib_destroy_cm_id(id_priv->cm_id.ib); 2771 id_priv->cm_id.ib = NULL; 2772 } 2773 out: 2774 kfree(private_data); 2775 return ret; 2776 } 2777 2778 static int cma_connect_ib(struct rdma_id_private *id_priv, 2779 struct rdma_conn_param *conn_param) 2780 { 2781 struct ib_cm_req_param req; 2782 struct rdma_route *route; 2783 void *private_data; 2784 struct ib_cm_id *id; 2785 int offset, ret; 2786 2787 memset(&req, 0, sizeof req); 2788 offset = cma_user_data_offset(id_priv); 2789 req.private_data_len = offset + conn_param->private_data_len; 2790 if (req.private_data_len < conn_param->private_data_len) 2791 return -EINVAL; 2792 2793 if (req.private_data_len) { 2794 private_data = kzalloc(req.private_data_len, GFP_ATOMIC); 2795 if (!private_data) 2796 return -ENOMEM; 2797 } else { 2798 private_data = NULL; 2799 } 2800 2801 if (conn_param->private_data && conn_param->private_data_len) 2802 memcpy(private_data + offset, conn_param->private_data, 2803 conn_param->private_data_len); 2804 2805 id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv); 2806 if (IS_ERR(id)) { 2807 ret = PTR_ERR(id); 2808 goto out; 2809 } 2810 id_priv->cm_id.ib = id; 2811 2812 route = &id_priv->id.route; 2813 if (private_data) { 2814 ret = cma_format_hdr(private_data, id_priv); 2815 if (ret) 2816 goto out; 2817 req.private_data = private_data; 2818 } 2819 2820 req.primary_path = &route->path_rec[0]; 2821 if (route->num_paths == 2) 2822 req.alternate_path = &route->path_rec[1]; 2823 2824 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv)); 2825 req.qp_num = id_priv->qp_num; 2826 req.qp_type = id_priv->id.qp_type; 2827 req.starting_psn = id_priv->seq_num; 2828 req.responder_resources = conn_param->responder_resources; 2829 req.initiator_depth = conn_param->initiator_depth; 2830 req.flow_control = conn_param->flow_control; 2831 req.retry_count = min_t(u8, 7, conn_param->retry_count); 2832 req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count); 2833 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; 2834 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; 2835 req.max_cm_retries = CMA_MAX_CM_RETRIES; 2836 req.srq = id_priv->srq ? 1 : 0; 2837 2838 ret = ib_send_cm_req(id_priv->cm_id.ib, &req); 2839 out: 2840 if (ret && !IS_ERR(id)) { 2841 ib_destroy_cm_id(id); 2842 id_priv->cm_id.ib = NULL; 2843 } 2844 2845 kfree(private_data); 2846 return ret; 2847 } 2848 2849 static int cma_connect_iw(struct rdma_id_private *id_priv, 2850 struct rdma_conn_param *conn_param) 2851 { 2852 struct iw_cm_id *cm_id; 2853 int ret; 2854 struct iw_cm_conn_param iw_param; 2855 2856 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv); 2857 if (IS_ERR(cm_id)) 2858 return PTR_ERR(cm_id); 2859 2860 id_priv->cm_id.iw = cm_id; 2861 2862 memcpy(&cm_id->local_addr, cma_src_addr(id_priv), 2863 rdma_addr_size(cma_src_addr(id_priv))); 2864 memcpy(&cm_id->remote_addr, cma_dst_addr(id_priv), 2865 rdma_addr_size(cma_dst_addr(id_priv))); 2866 2867 ret = cma_modify_qp_rtr(id_priv, conn_param); 2868 if (ret) 2869 goto out; 2870 2871 if (conn_param) { 2872 iw_param.ord = conn_param->initiator_depth; 2873 iw_param.ird = conn_param->responder_resources; 2874 iw_param.private_data = conn_param->private_data; 2875 iw_param.private_data_len = conn_param->private_data_len; 2876 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num; 2877 } else { 2878 memset(&iw_param, 0, sizeof iw_param); 2879 iw_param.qpn = id_priv->qp_num; 2880 } 2881 ret = iw_cm_connect(cm_id, &iw_param); 2882 out: 2883 if (ret) { 2884 iw_destroy_cm_id(cm_id); 2885 id_priv->cm_id.iw = NULL; 2886 } 2887 return ret; 2888 } 2889 2890 int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) 2891 { 2892 struct rdma_id_private *id_priv; 2893 int ret; 2894 2895 id_priv = container_of(id, struct rdma_id_private, id); 2896 if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT)) 2897 return -EINVAL; 2898 2899 if (!id->qp) { 2900 id_priv->qp_num = conn_param->qp_num; 2901 id_priv->srq = conn_param->srq; 2902 } 2903 2904 switch (rdma_node_get_transport(id->device->node_type)) { 2905 case RDMA_TRANSPORT_IB: 2906 if (id->qp_type == IB_QPT_UD) 2907 ret = cma_resolve_ib_udp(id_priv, conn_param); 2908 else 2909 ret = cma_connect_ib(id_priv, conn_param); 2910 break; 2911 case RDMA_TRANSPORT_IWARP: 2912 ret = cma_connect_iw(id_priv, conn_param); 2913 break; 2914 default: 2915 ret = -ENOSYS; 2916 break; 2917 } 2918 if (ret) 2919 goto err; 2920 2921 return 0; 2922 err: 2923 cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED); 2924 return ret; 2925 } 2926 EXPORT_SYMBOL(rdma_connect); 2927 2928 static int cma_accept_ib(struct rdma_id_private *id_priv, 2929 struct rdma_conn_param *conn_param) 2930 { 2931 struct ib_cm_rep_param rep; 2932 int ret; 2933 2934 ret = cma_modify_qp_rtr(id_priv, conn_param); 2935 if (ret) 2936 goto out; 2937 2938 ret = cma_modify_qp_rts(id_priv, conn_param); 2939 if (ret) 2940 goto out; 2941 2942 memset(&rep, 0, sizeof rep); 2943 rep.qp_num = id_priv->qp_num; 2944 rep.starting_psn = id_priv->seq_num; 2945 rep.private_data = conn_param->private_data; 2946 rep.private_data_len = conn_param->private_data_len; 2947 rep.responder_resources = conn_param->responder_resources; 2948 rep.initiator_depth = conn_param->initiator_depth; 2949 rep.failover_accepted = 0; 2950 rep.flow_control = conn_param->flow_control; 2951 rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count); 2952 rep.srq = id_priv->srq ? 1 : 0; 2953 2954 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep); 2955 out: 2956 return ret; 2957 } 2958 2959 static int cma_accept_iw(struct rdma_id_private *id_priv, 2960 struct rdma_conn_param *conn_param) 2961 { 2962 struct iw_cm_conn_param iw_param; 2963 int ret; 2964 2965 ret = cma_modify_qp_rtr(id_priv, conn_param); 2966 if (ret) 2967 return ret; 2968 2969 iw_param.ord = conn_param->initiator_depth; 2970 iw_param.ird = conn_param->responder_resources; 2971 iw_param.private_data = conn_param->private_data; 2972 iw_param.private_data_len = conn_param->private_data_len; 2973 if (id_priv->id.qp) { 2974 iw_param.qpn = id_priv->qp_num; 2975 } else 2976 iw_param.qpn = conn_param->qp_num; 2977 2978 return iw_cm_accept(id_priv->cm_id.iw, &iw_param); 2979 } 2980 2981 static int cma_send_sidr_rep(struct rdma_id_private *id_priv, 2982 enum ib_cm_sidr_status status, u32 qkey, 2983 const void *private_data, int private_data_len) 2984 { 2985 struct ib_cm_sidr_rep_param rep; 2986 int ret; 2987 2988 memset(&rep, 0, sizeof rep); 2989 rep.status = status; 2990 if (status == IB_SIDR_SUCCESS) { 2991 ret = cma_set_qkey(id_priv, qkey); 2992 if (ret) 2993 return ret; 2994 rep.qp_num = id_priv->qp_num; 2995 rep.qkey = id_priv->qkey; 2996 } 2997 rep.private_data = private_data; 2998 rep.private_data_len = private_data_len; 2999 3000 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep); 3001 } 3002 3003 int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) 3004 { 3005 struct rdma_id_private *id_priv; 3006 int ret; 3007 3008 id_priv = container_of(id, struct rdma_id_private, id); 3009 3010 id_priv->owner = task_pid_nr(current); 3011 3012 if (!cma_comp(id_priv, RDMA_CM_CONNECT)) 3013 return -EINVAL; 3014 3015 if (!id->qp && conn_param) { 3016 id_priv->qp_num = conn_param->qp_num; 3017 id_priv->srq = conn_param->srq; 3018 } 3019 3020 switch (rdma_node_get_transport(id->device->node_type)) { 3021 case RDMA_TRANSPORT_IB: 3022 if (id->qp_type == IB_QPT_UD) { 3023 if (conn_param) 3024 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS, 3025 conn_param->qkey, 3026 conn_param->private_data, 3027 conn_param->private_data_len); 3028 else 3029 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS, 3030 0, NULL, 0); 3031 } else { 3032 if (conn_param) 3033 ret = cma_accept_ib(id_priv, conn_param); 3034 else 3035 ret = cma_rep_recv(id_priv); 3036 } 3037 break; 3038 case RDMA_TRANSPORT_IWARP: 3039 ret = cma_accept_iw(id_priv, conn_param); 3040 break; 3041 default: 3042 ret = -ENOSYS; 3043 break; 3044 } 3045 3046 if (ret) 3047 goto reject; 3048 3049 return 0; 3050 reject: 3051 cma_modify_qp_err(id_priv); 3052 rdma_reject(id, NULL, 0); 3053 return ret; 3054 } 3055 EXPORT_SYMBOL(rdma_accept); 3056 3057 int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event) 3058 { 3059 struct rdma_id_private *id_priv; 3060 int ret; 3061 3062 id_priv = container_of(id, struct rdma_id_private, id); 3063 if (!id_priv->cm_id.ib) 3064 return -EINVAL; 3065 3066 switch (id->device->node_type) { 3067 case RDMA_NODE_IB_CA: 3068 ret = ib_cm_notify(id_priv->cm_id.ib, event); 3069 break; 3070 default: 3071 ret = 0; 3072 break; 3073 } 3074 return ret; 3075 } 3076 EXPORT_SYMBOL(rdma_notify); 3077 3078 int rdma_reject(struct rdma_cm_id *id, const void *private_data, 3079 u8 private_data_len) 3080 { 3081 struct rdma_id_private *id_priv; 3082 int ret; 3083 3084 id_priv = container_of(id, struct rdma_id_private, id); 3085 if (!id_priv->cm_id.ib) 3086 return -EINVAL; 3087 3088 switch (rdma_node_get_transport(id->device->node_type)) { 3089 case RDMA_TRANSPORT_IB: 3090 if (id->qp_type == IB_QPT_UD) 3091 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0, 3092 private_data, private_data_len); 3093 else 3094 ret = ib_send_cm_rej(id_priv->cm_id.ib, 3095 IB_CM_REJ_CONSUMER_DEFINED, NULL, 3096 0, private_data, private_data_len); 3097 break; 3098 case RDMA_TRANSPORT_IWARP: 3099 ret = iw_cm_reject(id_priv->cm_id.iw, 3100 private_data, private_data_len); 3101 break; 3102 default: 3103 ret = -ENOSYS; 3104 break; 3105 } 3106 return ret; 3107 } 3108 EXPORT_SYMBOL(rdma_reject); 3109 3110 int rdma_disconnect(struct rdma_cm_id *id) 3111 { 3112 struct rdma_id_private *id_priv; 3113 int ret; 3114 3115 id_priv = container_of(id, struct rdma_id_private, id); 3116 if (!id_priv->cm_id.ib) 3117 return -EINVAL; 3118 3119 switch (rdma_node_get_transport(id->device->node_type)) { 3120 case RDMA_TRANSPORT_IB: 3121 ret = cma_modify_qp_err(id_priv); 3122 if (ret) 3123 goto out; 3124 /* Initiate or respond to a disconnect. */ 3125 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0)) 3126 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0); 3127 break; 3128 case RDMA_TRANSPORT_IWARP: 3129 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0); 3130 break; 3131 default: 3132 ret = -EINVAL; 3133 break; 3134 } 3135 out: 3136 return ret; 3137 } 3138 EXPORT_SYMBOL(rdma_disconnect); 3139 3140 static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast) 3141 { 3142 struct rdma_id_private *id_priv; 3143 struct cma_multicast *mc = multicast->context; 3144 struct rdma_cm_event event; 3145 int ret; 3146 3147 id_priv = mc->id_priv; 3148 if (cma_disable_callback(id_priv, RDMA_CM_ADDR_BOUND) && 3149 cma_disable_callback(id_priv, RDMA_CM_ADDR_RESOLVED)) 3150 return 0; 3151 3152 if (!status) 3153 status = cma_set_qkey(id_priv, be32_to_cpu(multicast->rec.qkey)); 3154 mutex_lock(&id_priv->qp_mutex); 3155 if (!status && id_priv->id.qp) 3156 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid, 3157 be16_to_cpu(multicast->rec.mlid)); 3158 mutex_unlock(&id_priv->qp_mutex); 3159 3160 memset(&event, 0, sizeof event); 3161 event.status = status; 3162 event.param.ud.private_data = mc->context; 3163 if (!status) { 3164 event.event = RDMA_CM_EVENT_MULTICAST_JOIN; 3165 ib_init_ah_from_mcmember(id_priv->id.device, 3166 id_priv->id.port_num, &multicast->rec, 3167 &event.param.ud.ah_attr); 3168 event.param.ud.qp_num = 0xFFFFFF; 3169 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey); 3170 } else 3171 event.event = RDMA_CM_EVENT_MULTICAST_ERROR; 3172 3173 ret = id_priv->id.event_handler(&id_priv->id, &event); 3174 if (ret) { 3175 cma_exch(id_priv, RDMA_CM_DESTROYING); 3176 mutex_unlock(&id_priv->handler_mutex); 3177 rdma_destroy_id(&id_priv->id); 3178 return 0; 3179 } 3180 3181 mutex_unlock(&id_priv->handler_mutex); 3182 return 0; 3183 } 3184 3185 static void cma_set_mgid(struct rdma_id_private *id_priv, 3186 struct sockaddr *addr, union ib_gid *mgid) 3187 { 3188 unsigned char mc_map[MAX_ADDR_LEN]; 3189 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 3190 struct sockaddr_in *sin = (struct sockaddr_in *) addr; 3191 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr; 3192 3193 if (cma_any_addr(addr)) { 3194 memset(mgid, 0, sizeof *mgid); 3195 } else if ((addr->sa_family == AF_INET6) && 3196 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) == 3197 0xFF10A01B)) { 3198 /* IPv6 address is an SA assigned MGID. */ 3199 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid); 3200 } else if (addr->sa_family == AF_IB) { 3201 memcpy(mgid, &((struct sockaddr_ib *) addr)->sib_addr, sizeof *mgid); 3202 } else if ((addr->sa_family == AF_INET6)) { 3203 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map); 3204 if (id_priv->id.ps == RDMA_PS_UDP) 3205 mc_map[7] = 0x01; /* Use RDMA CM signature */ 3206 *mgid = *(union ib_gid *) (mc_map + 4); 3207 } else { 3208 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map); 3209 if (id_priv->id.ps == RDMA_PS_UDP) 3210 mc_map[7] = 0x01; /* Use RDMA CM signature */ 3211 *mgid = *(union ib_gid *) (mc_map + 4); 3212 } 3213 } 3214 3215 static int cma_join_ib_multicast(struct rdma_id_private *id_priv, 3216 struct cma_multicast *mc) 3217 { 3218 struct ib_sa_mcmember_rec rec; 3219 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 3220 ib_sa_comp_mask comp_mask; 3221 int ret; 3222 3223 ib_addr_get_mgid(dev_addr, &rec.mgid); 3224 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num, 3225 &rec.mgid, &rec); 3226 if (ret) 3227 return ret; 3228 3229 ret = cma_set_qkey(id_priv, 0); 3230 if (ret) 3231 return ret; 3232 3233 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid); 3234 rec.qkey = cpu_to_be32(id_priv->qkey); 3235 rdma_addr_get_sgid(dev_addr, &rec.port_gid); 3236 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); 3237 rec.join_state = 1; 3238 3239 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID | 3240 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE | 3241 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL | 3242 IB_SA_MCMEMBER_REC_FLOW_LABEL | 3243 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS; 3244 3245 if (id_priv->id.ps == RDMA_PS_IPOIB) 3246 comp_mask |= IB_SA_MCMEMBER_REC_RATE | 3247 IB_SA_MCMEMBER_REC_RATE_SELECTOR | 3248 IB_SA_MCMEMBER_REC_MTU_SELECTOR | 3249 IB_SA_MCMEMBER_REC_MTU | 3250 IB_SA_MCMEMBER_REC_HOP_LIMIT; 3251 3252 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device, 3253 id_priv->id.port_num, &rec, 3254 comp_mask, GFP_KERNEL, 3255 cma_ib_mc_handler, mc); 3256 return PTR_ERR_OR_ZERO(mc->multicast.ib); 3257 } 3258 3259 static void iboe_mcast_work_handler(struct work_struct *work) 3260 { 3261 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work); 3262 struct cma_multicast *mc = mw->mc; 3263 struct ib_sa_multicast *m = mc->multicast.ib; 3264 3265 mc->multicast.ib->context = mc; 3266 cma_ib_mc_handler(0, m); 3267 kref_put(&mc->mcref, release_mc); 3268 kfree(mw); 3269 } 3270 3271 static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid) 3272 { 3273 struct sockaddr_in *sin = (struct sockaddr_in *)addr; 3274 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr; 3275 3276 if (cma_any_addr(addr)) { 3277 memset(mgid, 0, sizeof *mgid); 3278 } else if (addr->sa_family == AF_INET6) { 3279 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid); 3280 } else { 3281 mgid->raw[0] = 0xff; 3282 mgid->raw[1] = 0x0e; 3283 mgid->raw[2] = 0; 3284 mgid->raw[3] = 0; 3285 mgid->raw[4] = 0; 3286 mgid->raw[5] = 0; 3287 mgid->raw[6] = 0; 3288 mgid->raw[7] = 0; 3289 mgid->raw[8] = 0; 3290 mgid->raw[9] = 0; 3291 mgid->raw[10] = 0xff; 3292 mgid->raw[11] = 0xff; 3293 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr; 3294 } 3295 } 3296 3297 static int cma_iboe_join_multicast(struct rdma_id_private *id_priv, 3298 struct cma_multicast *mc) 3299 { 3300 struct iboe_mcast_work *work; 3301 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 3302 int err; 3303 struct sockaddr *addr = (struct sockaddr *)&mc->addr; 3304 struct net_device *ndev = NULL; 3305 3306 if (cma_zero_addr((struct sockaddr *)&mc->addr)) 3307 return -EINVAL; 3308 3309 work = kzalloc(sizeof *work, GFP_KERNEL); 3310 if (!work) 3311 return -ENOMEM; 3312 3313 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL); 3314 if (!mc->multicast.ib) { 3315 err = -ENOMEM; 3316 goto out1; 3317 } 3318 3319 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid); 3320 3321 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff); 3322 if (id_priv->id.ps == RDMA_PS_UDP) 3323 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY); 3324 3325 if (dev_addr->bound_dev_if) 3326 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if); 3327 if (!ndev) { 3328 err = -ENODEV; 3329 goto out2; 3330 } 3331 mc->multicast.ib->rec.rate = iboe_get_rate(ndev); 3332 mc->multicast.ib->rec.hop_limit = 1; 3333 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu); 3334 dev_put(ndev); 3335 if (!mc->multicast.ib->rec.mtu) { 3336 err = -EINVAL; 3337 goto out2; 3338 } 3339 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr, 3340 &mc->multicast.ib->rec.port_gid); 3341 work->id = id_priv; 3342 work->mc = mc; 3343 INIT_WORK(&work->work, iboe_mcast_work_handler); 3344 kref_get(&mc->mcref); 3345 queue_work(cma_wq, &work->work); 3346 3347 return 0; 3348 3349 out2: 3350 kfree(mc->multicast.ib); 3351 out1: 3352 kfree(work); 3353 return err; 3354 } 3355 3356 int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr, 3357 void *context) 3358 { 3359 struct rdma_id_private *id_priv; 3360 struct cma_multicast *mc; 3361 int ret; 3362 3363 id_priv = container_of(id, struct rdma_id_private, id); 3364 if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) && 3365 !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED)) 3366 return -EINVAL; 3367 3368 mc = kmalloc(sizeof *mc, GFP_KERNEL); 3369 if (!mc) 3370 return -ENOMEM; 3371 3372 memcpy(&mc->addr, addr, rdma_addr_size(addr)); 3373 mc->context = context; 3374 mc->id_priv = id_priv; 3375 3376 spin_lock(&id_priv->lock); 3377 list_add(&mc->list, &id_priv->mc_list); 3378 spin_unlock(&id_priv->lock); 3379 3380 switch (rdma_node_get_transport(id->device->node_type)) { 3381 case RDMA_TRANSPORT_IB: 3382 switch (rdma_port_get_link_layer(id->device, id->port_num)) { 3383 case IB_LINK_LAYER_INFINIBAND: 3384 ret = cma_join_ib_multicast(id_priv, mc); 3385 break; 3386 case IB_LINK_LAYER_ETHERNET: 3387 kref_init(&mc->mcref); 3388 ret = cma_iboe_join_multicast(id_priv, mc); 3389 break; 3390 default: 3391 ret = -EINVAL; 3392 } 3393 break; 3394 default: 3395 ret = -ENOSYS; 3396 break; 3397 } 3398 3399 if (ret) { 3400 spin_lock_irq(&id_priv->lock); 3401 list_del(&mc->list); 3402 spin_unlock_irq(&id_priv->lock); 3403 kfree(mc); 3404 } 3405 return ret; 3406 } 3407 EXPORT_SYMBOL(rdma_join_multicast); 3408 3409 void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr) 3410 { 3411 struct rdma_id_private *id_priv; 3412 struct cma_multicast *mc; 3413 3414 id_priv = container_of(id, struct rdma_id_private, id); 3415 spin_lock_irq(&id_priv->lock); 3416 list_for_each_entry(mc, &id_priv->mc_list, list) { 3417 if (!memcmp(&mc->addr, addr, rdma_addr_size(addr))) { 3418 list_del(&mc->list); 3419 spin_unlock_irq(&id_priv->lock); 3420 3421 if (id->qp) 3422 ib_detach_mcast(id->qp, 3423 &mc->multicast.ib->rec.mgid, 3424 be16_to_cpu(mc->multicast.ib->rec.mlid)); 3425 if (rdma_node_get_transport(id_priv->cma_dev->device->node_type) == RDMA_TRANSPORT_IB) { 3426 switch (rdma_port_get_link_layer(id->device, id->port_num)) { 3427 case IB_LINK_LAYER_INFINIBAND: 3428 ib_sa_free_multicast(mc->multicast.ib); 3429 kfree(mc); 3430 break; 3431 case IB_LINK_LAYER_ETHERNET: 3432 kref_put(&mc->mcref, release_mc); 3433 break; 3434 default: 3435 break; 3436 } 3437 } 3438 return; 3439 } 3440 } 3441 spin_unlock_irq(&id_priv->lock); 3442 } 3443 EXPORT_SYMBOL(rdma_leave_multicast); 3444 3445 static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv) 3446 { 3447 struct rdma_dev_addr *dev_addr; 3448 struct cma_ndev_work *work; 3449 3450 dev_addr = &id_priv->id.route.addr.dev_addr; 3451 3452 if ((dev_addr->bound_dev_if == ndev->ifindex) && 3453 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) { 3454 printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n", 3455 ndev->name, &id_priv->id); 3456 work = kzalloc(sizeof *work, GFP_KERNEL); 3457 if (!work) 3458 return -ENOMEM; 3459 3460 INIT_WORK(&work->work, cma_ndev_work_handler); 3461 work->id = id_priv; 3462 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE; 3463 atomic_inc(&id_priv->refcount); 3464 queue_work(cma_wq, &work->work); 3465 } 3466 3467 return 0; 3468 } 3469 3470 static int cma_netdev_callback(struct notifier_block *self, unsigned long event, 3471 void *ptr) 3472 { 3473 struct net_device *ndev = netdev_notifier_info_to_dev(ptr); 3474 struct cma_device *cma_dev; 3475 struct rdma_id_private *id_priv; 3476 int ret = NOTIFY_DONE; 3477 3478 if (dev_net(ndev) != &init_net) 3479 return NOTIFY_DONE; 3480 3481 if (event != NETDEV_BONDING_FAILOVER) 3482 return NOTIFY_DONE; 3483 3484 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING)) 3485 return NOTIFY_DONE; 3486 3487 mutex_lock(&lock); 3488 list_for_each_entry(cma_dev, &dev_list, list) 3489 list_for_each_entry(id_priv, &cma_dev->id_list, list) { 3490 ret = cma_netdev_change(ndev, id_priv); 3491 if (ret) 3492 goto out; 3493 } 3494 3495 out: 3496 mutex_unlock(&lock); 3497 return ret; 3498 } 3499 3500 static struct notifier_block cma_nb = { 3501 .notifier_call = cma_netdev_callback 3502 }; 3503 3504 static void cma_add_one(struct ib_device *device) 3505 { 3506 struct cma_device *cma_dev; 3507 struct rdma_id_private *id_priv; 3508 3509 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL); 3510 if (!cma_dev) 3511 return; 3512 3513 cma_dev->device = device; 3514 3515 init_completion(&cma_dev->comp); 3516 atomic_set(&cma_dev->refcount, 1); 3517 INIT_LIST_HEAD(&cma_dev->id_list); 3518 ib_set_client_data(device, &cma_client, cma_dev); 3519 3520 mutex_lock(&lock); 3521 list_add_tail(&cma_dev->list, &dev_list); 3522 list_for_each_entry(id_priv, &listen_any_list, list) 3523 cma_listen_on_dev(id_priv, cma_dev); 3524 mutex_unlock(&lock); 3525 } 3526 3527 static int cma_remove_id_dev(struct rdma_id_private *id_priv) 3528 { 3529 struct rdma_cm_event event; 3530 enum rdma_cm_state state; 3531 int ret = 0; 3532 3533 /* Record that we want to remove the device */ 3534 state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL); 3535 if (state == RDMA_CM_DESTROYING) 3536 return 0; 3537 3538 cma_cancel_operation(id_priv, state); 3539 mutex_lock(&id_priv->handler_mutex); 3540 3541 /* Check for destruction from another callback. */ 3542 if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL)) 3543 goto out; 3544 3545 memset(&event, 0, sizeof event); 3546 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL; 3547 ret = id_priv->id.event_handler(&id_priv->id, &event); 3548 out: 3549 mutex_unlock(&id_priv->handler_mutex); 3550 return ret; 3551 } 3552 3553 static void cma_process_remove(struct cma_device *cma_dev) 3554 { 3555 struct rdma_id_private *id_priv; 3556 int ret; 3557 3558 mutex_lock(&lock); 3559 while (!list_empty(&cma_dev->id_list)) { 3560 id_priv = list_entry(cma_dev->id_list.next, 3561 struct rdma_id_private, list); 3562 3563 list_del(&id_priv->listen_list); 3564 list_del_init(&id_priv->list); 3565 atomic_inc(&id_priv->refcount); 3566 mutex_unlock(&lock); 3567 3568 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv); 3569 cma_deref_id(id_priv); 3570 if (ret) 3571 rdma_destroy_id(&id_priv->id); 3572 3573 mutex_lock(&lock); 3574 } 3575 mutex_unlock(&lock); 3576 3577 cma_deref_dev(cma_dev); 3578 wait_for_completion(&cma_dev->comp); 3579 } 3580 3581 static void cma_remove_one(struct ib_device *device) 3582 { 3583 struct cma_device *cma_dev; 3584 3585 cma_dev = ib_get_client_data(device, &cma_client); 3586 if (!cma_dev) 3587 return; 3588 3589 mutex_lock(&lock); 3590 list_del(&cma_dev->list); 3591 mutex_unlock(&lock); 3592 3593 cma_process_remove(cma_dev); 3594 kfree(cma_dev); 3595 } 3596 3597 static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb) 3598 { 3599 struct nlmsghdr *nlh; 3600 struct rdma_cm_id_stats *id_stats; 3601 struct rdma_id_private *id_priv; 3602 struct rdma_cm_id *id = NULL; 3603 struct cma_device *cma_dev; 3604 int i_dev = 0, i_id = 0; 3605 3606 /* 3607 * We export all of the IDs as a sequence of messages. Each 3608 * ID gets its own netlink message. 3609 */ 3610 mutex_lock(&lock); 3611 3612 list_for_each_entry(cma_dev, &dev_list, list) { 3613 if (i_dev < cb->args[0]) { 3614 i_dev++; 3615 continue; 3616 } 3617 3618 i_id = 0; 3619 list_for_each_entry(id_priv, &cma_dev->id_list, list) { 3620 if (i_id < cb->args[1]) { 3621 i_id++; 3622 continue; 3623 } 3624 3625 id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq, 3626 sizeof *id_stats, RDMA_NL_RDMA_CM, 3627 RDMA_NL_RDMA_CM_ID_STATS, 3628 NLM_F_MULTI); 3629 if (!id_stats) 3630 goto out; 3631 3632 memset(id_stats, 0, sizeof *id_stats); 3633 id = &id_priv->id; 3634 id_stats->node_type = id->route.addr.dev_addr.dev_type; 3635 id_stats->port_num = id->port_num; 3636 id_stats->bound_dev_if = 3637 id->route.addr.dev_addr.bound_dev_if; 3638 3639 if (ibnl_put_attr(skb, nlh, 3640 rdma_addr_size(cma_src_addr(id_priv)), 3641 cma_src_addr(id_priv), 3642 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR)) 3643 goto out; 3644 if (ibnl_put_attr(skb, nlh, 3645 rdma_addr_size(cma_src_addr(id_priv)), 3646 cma_dst_addr(id_priv), 3647 RDMA_NL_RDMA_CM_ATTR_DST_ADDR)) 3648 goto out; 3649 3650 id_stats->pid = id_priv->owner; 3651 id_stats->port_space = id->ps; 3652 id_stats->cm_state = id_priv->state; 3653 id_stats->qp_num = id_priv->qp_num; 3654 id_stats->qp_type = id->qp_type; 3655 3656 i_id++; 3657 } 3658 3659 cb->args[1] = 0; 3660 i_dev++; 3661 } 3662 3663 out: 3664 mutex_unlock(&lock); 3665 cb->args[0] = i_dev; 3666 cb->args[1] = i_id; 3667 3668 return skb->len; 3669 } 3670 3671 static const struct ibnl_client_cbs cma_cb_table[] = { 3672 [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats, 3673 .module = THIS_MODULE }, 3674 }; 3675 3676 static int __init cma_init(void) 3677 { 3678 int ret; 3679 3680 cma_wq = create_singlethread_workqueue("rdma_cm"); 3681 if (!cma_wq) 3682 return -ENOMEM; 3683 3684 ib_sa_register_client(&sa_client); 3685 rdma_addr_register_client(&addr_client); 3686 register_netdevice_notifier(&cma_nb); 3687 3688 ret = ib_register_client(&cma_client); 3689 if (ret) 3690 goto err; 3691 3692 if (ibnl_add_client(RDMA_NL_RDMA_CM, RDMA_NL_RDMA_CM_NUM_OPS, cma_cb_table)) 3693 printk(KERN_WARNING "RDMA CMA: failed to add netlink callback\n"); 3694 3695 return 0; 3696 3697 err: 3698 unregister_netdevice_notifier(&cma_nb); 3699 rdma_addr_unregister_client(&addr_client); 3700 ib_sa_unregister_client(&sa_client); 3701 destroy_workqueue(cma_wq); 3702 return ret; 3703 } 3704 3705 static void __exit cma_cleanup(void) 3706 { 3707 ibnl_remove_client(RDMA_NL_RDMA_CM); 3708 ib_unregister_client(&cma_client); 3709 unregister_netdevice_notifier(&cma_nb); 3710 rdma_addr_unregister_client(&addr_client); 3711 ib_sa_unregister_client(&sa_client); 3712 destroy_workqueue(cma_wq); 3713 idr_destroy(&tcp_ps); 3714 idr_destroy(&udp_ps); 3715 idr_destroy(&ipoib_ps); 3716 idr_destroy(&ib_ps); 3717 } 3718 3719 module_init(cma_init); 3720 module_exit(cma_cleanup); 3721