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 licensed under one of the following licenses: 8 * 9 * 1) under the terms of the "Common Public License 1.0" a copy of which is 10 * available from the Open Source Initiative, see 11 * http://www.opensource.org/licenses/cpl.php. 12 * 13 * 2) under the terms of the "The BSD License" a copy of which is 14 * available from the Open Source Initiative, see 15 * http://www.opensource.org/licenses/bsd-license.php. 16 * 17 * 3) under the terms of the "GNU General Public License (GPL) Version 2" a 18 * copy of which is available from the Open Source Initiative, see 19 * http://www.opensource.org/licenses/gpl-license.php. 20 * 21 * Licensee has the right to choose one of the above licenses. 22 * 23 * Redistributions of source code must retain the above copyright 24 * notice and one of the license notices. 25 * 26 * Redistributions in binary form must reproduce both the above copyright 27 * notice, one of the license notices in the documentation 28 * and/or other materials provided with the distribution. 29 * 30 */ 31 32 #include <linux/completion.h> 33 #include <linux/in.h> 34 #include <linux/in6.h> 35 #include <linux/mutex.h> 36 #include <linux/random.h> 37 #include <linux/idr.h> 38 #include <linux/inetdevice.h> 39 40 #include <net/tcp.h> 41 42 #include <rdma/rdma_cm.h> 43 #include <rdma/rdma_cm_ib.h> 44 #include <rdma/ib_cache.h> 45 #include <rdma/ib_cm.h> 46 #include <rdma/ib_sa.h> 47 #include <rdma/iw_cm.h> 48 49 MODULE_AUTHOR("Sean Hefty"); 50 MODULE_DESCRIPTION("Generic RDMA CM Agent"); 51 MODULE_LICENSE("Dual BSD/GPL"); 52 53 #define CMA_CM_RESPONSE_TIMEOUT 20 54 #define CMA_MAX_CM_RETRIES 15 55 56 static void cma_add_one(struct ib_device *device); 57 static void cma_remove_one(struct ib_device *device); 58 59 static struct ib_client cma_client = { 60 .name = "cma", 61 .add = cma_add_one, 62 .remove = cma_remove_one 63 }; 64 65 static struct ib_sa_client sa_client; 66 static struct rdma_addr_client addr_client; 67 static LIST_HEAD(dev_list); 68 static LIST_HEAD(listen_any_list); 69 static DEFINE_MUTEX(lock); 70 static struct workqueue_struct *cma_wq; 71 static DEFINE_IDR(sdp_ps); 72 static DEFINE_IDR(tcp_ps); 73 static DEFINE_IDR(udp_ps); 74 static DEFINE_IDR(ipoib_ps); 75 static int next_port; 76 77 struct cma_device { 78 struct list_head list; 79 struct ib_device *device; 80 struct completion comp; 81 atomic_t refcount; 82 struct list_head id_list; 83 }; 84 85 enum cma_state { 86 CMA_IDLE, 87 CMA_ADDR_QUERY, 88 CMA_ADDR_RESOLVED, 89 CMA_ROUTE_QUERY, 90 CMA_ROUTE_RESOLVED, 91 CMA_CONNECT, 92 CMA_DISCONNECT, 93 CMA_ADDR_BOUND, 94 CMA_LISTEN, 95 CMA_DEVICE_REMOVAL, 96 CMA_DESTROYING 97 }; 98 99 struct rdma_bind_list { 100 struct idr *ps; 101 struct hlist_head owners; 102 unsigned short port; 103 }; 104 105 /* 106 * Device removal can occur at anytime, so we need extra handling to 107 * serialize notifying the user of device removal with other callbacks. 108 * We do this by disabling removal notification while a callback is in process, 109 * and reporting it after the callback completes. 110 */ 111 struct rdma_id_private { 112 struct rdma_cm_id id; 113 114 struct rdma_bind_list *bind_list; 115 struct hlist_node node; 116 struct list_head list; 117 struct list_head listen_list; 118 struct cma_device *cma_dev; 119 struct list_head mc_list; 120 121 enum cma_state state; 122 spinlock_t lock; 123 struct completion comp; 124 atomic_t refcount; 125 wait_queue_head_t wait_remove; 126 atomic_t dev_remove; 127 128 int backlog; 129 int timeout_ms; 130 struct ib_sa_query *query; 131 int query_id; 132 union { 133 struct ib_cm_id *ib; 134 struct iw_cm_id *iw; 135 } cm_id; 136 137 u32 seq_num; 138 u32 qkey; 139 u32 qp_num; 140 u8 srq; 141 }; 142 143 struct cma_multicast { 144 struct rdma_id_private *id_priv; 145 union { 146 struct ib_sa_multicast *ib; 147 } multicast; 148 struct list_head list; 149 void *context; 150 struct sockaddr addr; 151 u8 pad[sizeof(struct sockaddr_in6) - 152 sizeof(struct sockaddr)]; 153 }; 154 155 struct cma_work { 156 struct work_struct work; 157 struct rdma_id_private *id; 158 enum cma_state old_state; 159 enum cma_state new_state; 160 struct rdma_cm_event event; 161 }; 162 163 union cma_ip_addr { 164 struct in6_addr ip6; 165 struct { 166 __u32 pad[3]; 167 __u32 addr; 168 } ip4; 169 }; 170 171 struct cma_hdr { 172 u8 cma_version; 173 u8 ip_version; /* IP version: 7:4 */ 174 __u16 port; 175 union cma_ip_addr src_addr; 176 union cma_ip_addr dst_addr; 177 }; 178 179 struct sdp_hh { 180 u8 bsdh[16]; 181 u8 sdp_version; /* Major version: 7:4 */ 182 u8 ip_version; /* IP version: 7:4 */ 183 u8 sdp_specific1[10]; 184 __u16 port; 185 __u16 sdp_specific2; 186 union cma_ip_addr src_addr; 187 union cma_ip_addr dst_addr; 188 }; 189 190 struct sdp_hah { 191 u8 bsdh[16]; 192 u8 sdp_version; 193 }; 194 195 #define CMA_VERSION 0x00 196 #define SDP_MAJ_VERSION 0x2 197 198 static int cma_comp(struct rdma_id_private *id_priv, enum cma_state comp) 199 { 200 unsigned long flags; 201 int ret; 202 203 spin_lock_irqsave(&id_priv->lock, flags); 204 ret = (id_priv->state == comp); 205 spin_unlock_irqrestore(&id_priv->lock, flags); 206 return ret; 207 } 208 209 static int cma_comp_exch(struct rdma_id_private *id_priv, 210 enum cma_state comp, enum cma_state exch) 211 { 212 unsigned long flags; 213 int ret; 214 215 spin_lock_irqsave(&id_priv->lock, flags); 216 if ((ret = (id_priv->state == comp))) 217 id_priv->state = exch; 218 spin_unlock_irqrestore(&id_priv->lock, flags); 219 return ret; 220 } 221 222 static enum cma_state cma_exch(struct rdma_id_private *id_priv, 223 enum cma_state exch) 224 { 225 unsigned long flags; 226 enum cma_state old; 227 228 spin_lock_irqsave(&id_priv->lock, flags); 229 old = id_priv->state; 230 id_priv->state = exch; 231 spin_unlock_irqrestore(&id_priv->lock, flags); 232 return old; 233 } 234 235 static inline u8 cma_get_ip_ver(struct cma_hdr *hdr) 236 { 237 return hdr->ip_version >> 4; 238 } 239 240 static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver) 241 { 242 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF); 243 } 244 245 static inline u8 sdp_get_majv(u8 sdp_version) 246 { 247 return sdp_version >> 4; 248 } 249 250 static inline u8 sdp_get_ip_ver(struct sdp_hh *hh) 251 { 252 return hh->ip_version >> 4; 253 } 254 255 static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver) 256 { 257 hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF); 258 } 259 260 static inline int cma_is_ud_ps(enum rdma_port_space ps) 261 { 262 return (ps == RDMA_PS_UDP || ps == RDMA_PS_IPOIB); 263 } 264 265 static void cma_attach_to_dev(struct rdma_id_private *id_priv, 266 struct cma_device *cma_dev) 267 { 268 atomic_inc(&cma_dev->refcount); 269 id_priv->cma_dev = cma_dev; 270 id_priv->id.device = cma_dev->device; 271 list_add_tail(&id_priv->list, &cma_dev->id_list); 272 } 273 274 static inline void cma_deref_dev(struct cma_device *cma_dev) 275 { 276 if (atomic_dec_and_test(&cma_dev->refcount)) 277 complete(&cma_dev->comp); 278 } 279 280 static void cma_detach_from_dev(struct rdma_id_private *id_priv) 281 { 282 list_del(&id_priv->list); 283 cma_deref_dev(id_priv->cma_dev); 284 id_priv->cma_dev = NULL; 285 } 286 287 static int cma_set_qkey(struct ib_device *device, u8 port_num, 288 enum rdma_port_space ps, 289 struct rdma_dev_addr *dev_addr, u32 *qkey) 290 { 291 struct ib_sa_mcmember_rec rec; 292 int ret = 0; 293 294 switch (ps) { 295 case RDMA_PS_UDP: 296 *qkey = RDMA_UDP_QKEY; 297 break; 298 case RDMA_PS_IPOIB: 299 ib_addr_get_mgid(dev_addr, &rec.mgid); 300 ret = ib_sa_get_mcmember_rec(device, port_num, &rec.mgid, &rec); 301 *qkey = be32_to_cpu(rec.qkey); 302 break; 303 default: 304 break; 305 } 306 return ret; 307 } 308 309 static int cma_acquire_dev(struct rdma_id_private *id_priv) 310 { 311 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 312 struct cma_device *cma_dev; 313 union ib_gid gid; 314 int ret = -ENODEV; 315 316 switch (rdma_node_get_transport(dev_addr->dev_type)) { 317 case RDMA_TRANSPORT_IB: 318 ib_addr_get_sgid(dev_addr, &gid); 319 break; 320 case RDMA_TRANSPORT_IWARP: 321 iw_addr_get_sgid(dev_addr, &gid); 322 break; 323 default: 324 return -ENODEV; 325 } 326 327 list_for_each_entry(cma_dev, &dev_list, list) { 328 ret = ib_find_cached_gid(cma_dev->device, &gid, 329 &id_priv->id.port_num, NULL); 330 if (!ret) { 331 ret = cma_set_qkey(cma_dev->device, 332 id_priv->id.port_num, 333 id_priv->id.ps, dev_addr, 334 &id_priv->qkey); 335 if (!ret) 336 cma_attach_to_dev(id_priv, cma_dev); 337 break; 338 } 339 } 340 return ret; 341 } 342 343 static void cma_deref_id(struct rdma_id_private *id_priv) 344 { 345 if (atomic_dec_and_test(&id_priv->refcount)) 346 complete(&id_priv->comp); 347 } 348 349 static int cma_disable_remove(struct rdma_id_private *id_priv, 350 enum cma_state state) 351 { 352 unsigned long flags; 353 int ret; 354 355 spin_lock_irqsave(&id_priv->lock, flags); 356 if (id_priv->state == state) { 357 atomic_inc(&id_priv->dev_remove); 358 ret = 0; 359 } else 360 ret = -EINVAL; 361 spin_unlock_irqrestore(&id_priv->lock, flags); 362 return ret; 363 } 364 365 static void cma_enable_remove(struct rdma_id_private *id_priv) 366 { 367 if (atomic_dec_and_test(&id_priv->dev_remove)) 368 wake_up(&id_priv->wait_remove); 369 } 370 371 static int cma_has_cm_dev(struct rdma_id_private *id_priv) 372 { 373 return (id_priv->id.device && id_priv->cm_id.ib); 374 } 375 376 struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler, 377 void *context, enum rdma_port_space ps) 378 { 379 struct rdma_id_private *id_priv; 380 381 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL); 382 if (!id_priv) 383 return ERR_PTR(-ENOMEM); 384 385 id_priv->state = CMA_IDLE; 386 id_priv->id.context = context; 387 id_priv->id.event_handler = event_handler; 388 id_priv->id.ps = ps; 389 spin_lock_init(&id_priv->lock); 390 init_completion(&id_priv->comp); 391 atomic_set(&id_priv->refcount, 1); 392 init_waitqueue_head(&id_priv->wait_remove); 393 atomic_set(&id_priv->dev_remove, 0); 394 INIT_LIST_HEAD(&id_priv->listen_list); 395 INIT_LIST_HEAD(&id_priv->mc_list); 396 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num); 397 398 return &id_priv->id; 399 } 400 EXPORT_SYMBOL(rdma_create_id); 401 402 static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp) 403 { 404 struct ib_qp_attr qp_attr; 405 int qp_attr_mask, ret; 406 407 qp_attr.qp_state = IB_QPS_INIT; 408 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 409 if (ret) 410 return ret; 411 412 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); 413 if (ret) 414 return ret; 415 416 qp_attr.qp_state = IB_QPS_RTR; 417 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE); 418 if (ret) 419 return ret; 420 421 qp_attr.qp_state = IB_QPS_RTS; 422 qp_attr.sq_psn = 0; 423 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN); 424 425 return ret; 426 } 427 428 static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp) 429 { 430 struct ib_qp_attr qp_attr; 431 int qp_attr_mask, ret; 432 433 qp_attr.qp_state = IB_QPS_INIT; 434 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 435 if (ret) 436 return ret; 437 438 return ib_modify_qp(qp, &qp_attr, qp_attr_mask); 439 } 440 441 int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd, 442 struct ib_qp_init_attr *qp_init_attr) 443 { 444 struct rdma_id_private *id_priv; 445 struct ib_qp *qp; 446 int ret; 447 448 id_priv = container_of(id, struct rdma_id_private, id); 449 if (id->device != pd->device) 450 return -EINVAL; 451 452 qp = ib_create_qp(pd, qp_init_attr); 453 if (IS_ERR(qp)) 454 return PTR_ERR(qp); 455 456 if (cma_is_ud_ps(id_priv->id.ps)) 457 ret = cma_init_ud_qp(id_priv, qp); 458 else 459 ret = cma_init_conn_qp(id_priv, qp); 460 if (ret) 461 goto err; 462 463 id->qp = qp; 464 id_priv->qp_num = qp->qp_num; 465 id_priv->srq = (qp->srq != NULL); 466 return 0; 467 err: 468 ib_destroy_qp(qp); 469 return ret; 470 } 471 EXPORT_SYMBOL(rdma_create_qp); 472 473 void rdma_destroy_qp(struct rdma_cm_id *id) 474 { 475 ib_destroy_qp(id->qp); 476 } 477 EXPORT_SYMBOL(rdma_destroy_qp); 478 479 static int cma_modify_qp_rtr(struct rdma_cm_id *id) 480 { 481 struct ib_qp_attr qp_attr; 482 int qp_attr_mask, ret; 483 484 if (!id->qp) 485 return 0; 486 487 /* Need to update QP attributes from default values. */ 488 qp_attr.qp_state = IB_QPS_INIT; 489 ret = rdma_init_qp_attr(id, &qp_attr, &qp_attr_mask); 490 if (ret) 491 return ret; 492 493 ret = ib_modify_qp(id->qp, &qp_attr, qp_attr_mask); 494 if (ret) 495 return ret; 496 497 qp_attr.qp_state = IB_QPS_RTR; 498 ret = rdma_init_qp_attr(id, &qp_attr, &qp_attr_mask); 499 if (ret) 500 return ret; 501 502 return ib_modify_qp(id->qp, &qp_attr, qp_attr_mask); 503 } 504 505 static int cma_modify_qp_rts(struct rdma_cm_id *id) 506 { 507 struct ib_qp_attr qp_attr; 508 int qp_attr_mask, ret; 509 510 if (!id->qp) 511 return 0; 512 513 qp_attr.qp_state = IB_QPS_RTS; 514 ret = rdma_init_qp_attr(id, &qp_attr, &qp_attr_mask); 515 if (ret) 516 return ret; 517 518 return ib_modify_qp(id->qp, &qp_attr, qp_attr_mask); 519 } 520 521 static int cma_modify_qp_err(struct rdma_cm_id *id) 522 { 523 struct ib_qp_attr qp_attr; 524 525 if (!id->qp) 526 return 0; 527 528 qp_attr.qp_state = IB_QPS_ERR; 529 return ib_modify_qp(id->qp, &qp_attr, IB_QP_STATE); 530 } 531 532 static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv, 533 struct ib_qp_attr *qp_attr, int *qp_attr_mask) 534 { 535 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 536 int ret; 537 538 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num, 539 ib_addr_get_pkey(dev_addr), 540 &qp_attr->pkey_index); 541 if (ret) 542 return ret; 543 544 qp_attr->port_num = id_priv->id.port_num; 545 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT; 546 547 if (cma_is_ud_ps(id_priv->id.ps)) { 548 qp_attr->qkey = id_priv->qkey; 549 *qp_attr_mask |= IB_QP_QKEY; 550 } else { 551 qp_attr->qp_access_flags = 0; 552 *qp_attr_mask |= IB_QP_ACCESS_FLAGS; 553 } 554 return 0; 555 } 556 557 int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr, 558 int *qp_attr_mask) 559 { 560 struct rdma_id_private *id_priv; 561 int ret = 0; 562 563 id_priv = container_of(id, struct rdma_id_private, id); 564 switch (rdma_node_get_transport(id_priv->id.device->node_type)) { 565 case RDMA_TRANSPORT_IB: 566 if (!id_priv->cm_id.ib || cma_is_ud_ps(id_priv->id.ps)) 567 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask); 568 else 569 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr, 570 qp_attr_mask); 571 if (qp_attr->qp_state == IB_QPS_RTR) 572 qp_attr->rq_psn = id_priv->seq_num; 573 break; 574 case RDMA_TRANSPORT_IWARP: 575 if (!id_priv->cm_id.iw) { 576 qp_attr->qp_access_flags = IB_ACCESS_LOCAL_WRITE; 577 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS; 578 } else 579 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr, 580 qp_attr_mask); 581 break; 582 default: 583 ret = -ENOSYS; 584 break; 585 } 586 587 return ret; 588 } 589 EXPORT_SYMBOL(rdma_init_qp_attr); 590 591 static inline int cma_zero_addr(struct sockaddr *addr) 592 { 593 struct in6_addr *ip6; 594 595 if (addr->sa_family == AF_INET) 596 return ZERONET(((struct sockaddr_in *) addr)->sin_addr.s_addr); 597 else { 598 ip6 = &((struct sockaddr_in6 *) addr)->sin6_addr; 599 return (ip6->s6_addr32[0] | ip6->s6_addr32[1] | 600 ip6->s6_addr32[2] | ip6->s6_addr32[3]) == 0; 601 } 602 } 603 604 static inline int cma_loopback_addr(struct sockaddr *addr) 605 { 606 return LOOPBACK(((struct sockaddr_in *) addr)->sin_addr.s_addr); 607 } 608 609 static inline int cma_any_addr(struct sockaddr *addr) 610 { 611 return cma_zero_addr(addr) || cma_loopback_addr(addr); 612 } 613 614 static inline __be16 cma_port(struct sockaddr *addr) 615 { 616 if (addr->sa_family == AF_INET) 617 return ((struct sockaddr_in *) addr)->sin_port; 618 else 619 return ((struct sockaddr_in6 *) addr)->sin6_port; 620 } 621 622 static inline int cma_any_port(struct sockaddr *addr) 623 { 624 return !cma_port(addr); 625 } 626 627 static int cma_get_net_info(void *hdr, enum rdma_port_space ps, 628 u8 *ip_ver, __u16 *port, 629 union cma_ip_addr **src, union cma_ip_addr **dst) 630 { 631 switch (ps) { 632 case RDMA_PS_SDP: 633 if (sdp_get_majv(((struct sdp_hh *) hdr)->sdp_version) != 634 SDP_MAJ_VERSION) 635 return -EINVAL; 636 637 *ip_ver = sdp_get_ip_ver(hdr); 638 *port = ((struct sdp_hh *) hdr)->port; 639 *src = &((struct sdp_hh *) hdr)->src_addr; 640 *dst = &((struct sdp_hh *) hdr)->dst_addr; 641 break; 642 default: 643 if (((struct cma_hdr *) hdr)->cma_version != CMA_VERSION) 644 return -EINVAL; 645 646 *ip_ver = cma_get_ip_ver(hdr); 647 *port = ((struct cma_hdr *) hdr)->port; 648 *src = &((struct cma_hdr *) hdr)->src_addr; 649 *dst = &((struct cma_hdr *) hdr)->dst_addr; 650 break; 651 } 652 653 if (*ip_ver != 4 && *ip_ver != 6) 654 return -EINVAL; 655 return 0; 656 } 657 658 static void cma_save_net_info(struct rdma_addr *addr, 659 struct rdma_addr *listen_addr, 660 u8 ip_ver, __u16 port, 661 union cma_ip_addr *src, union cma_ip_addr *dst) 662 { 663 struct sockaddr_in *listen4, *ip4; 664 struct sockaddr_in6 *listen6, *ip6; 665 666 switch (ip_ver) { 667 case 4: 668 listen4 = (struct sockaddr_in *) &listen_addr->src_addr; 669 ip4 = (struct sockaddr_in *) &addr->src_addr; 670 ip4->sin_family = listen4->sin_family; 671 ip4->sin_addr.s_addr = dst->ip4.addr; 672 ip4->sin_port = listen4->sin_port; 673 674 ip4 = (struct sockaddr_in *) &addr->dst_addr; 675 ip4->sin_family = listen4->sin_family; 676 ip4->sin_addr.s_addr = src->ip4.addr; 677 ip4->sin_port = port; 678 break; 679 case 6: 680 listen6 = (struct sockaddr_in6 *) &listen_addr->src_addr; 681 ip6 = (struct sockaddr_in6 *) &addr->src_addr; 682 ip6->sin6_family = listen6->sin6_family; 683 ip6->sin6_addr = dst->ip6; 684 ip6->sin6_port = listen6->sin6_port; 685 686 ip6 = (struct sockaddr_in6 *) &addr->dst_addr; 687 ip6->sin6_family = listen6->sin6_family; 688 ip6->sin6_addr = src->ip6; 689 ip6->sin6_port = port; 690 break; 691 default: 692 break; 693 } 694 } 695 696 static inline int cma_user_data_offset(enum rdma_port_space ps) 697 { 698 switch (ps) { 699 case RDMA_PS_SDP: 700 return 0; 701 default: 702 return sizeof(struct cma_hdr); 703 } 704 } 705 706 static void cma_cancel_route(struct rdma_id_private *id_priv) 707 { 708 switch (rdma_node_get_transport(id_priv->id.device->node_type)) { 709 case RDMA_TRANSPORT_IB: 710 if (id_priv->query) 711 ib_sa_cancel_query(id_priv->query_id, id_priv->query); 712 break; 713 default: 714 break; 715 } 716 } 717 718 static inline int cma_internal_listen(struct rdma_id_private *id_priv) 719 { 720 return (id_priv->state == CMA_LISTEN) && id_priv->cma_dev && 721 cma_any_addr(&id_priv->id.route.addr.src_addr); 722 } 723 724 static void cma_destroy_listen(struct rdma_id_private *id_priv) 725 { 726 cma_exch(id_priv, CMA_DESTROYING); 727 728 if (id_priv->cma_dev) { 729 switch (rdma_node_get_transport(id_priv->id.device->node_type)) { 730 case RDMA_TRANSPORT_IB: 731 if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib)) 732 ib_destroy_cm_id(id_priv->cm_id.ib); 733 break; 734 case RDMA_TRANSPORT_IWARP: 735 if (id_priv->cm_id.iw && !IS_ERR(id_priv->cm_id.iw)) 736 iw_destroy_cm_id(id_priv->cm_id.iw); 737 break; 738 default: 739 break; 740 } 741 cma_detach_from_dev(id_priv); 742 } 743 list_del(&id_priv->listen_list); 744 745 cma_deref_id(id_priv); 746 wait_for_completion(&id_priv->comp); 747 748 kfree(id_priv); 749 } 750 751 static void cma_cancel_listens(struct rdma_id_private *id_priv) 752 { 753 struct rdma_id_private *dev_id_priv; 754 755 mutex_lock(&lock); 756 list_del(&id_priv->list); 757 758 while (!list_empty(&id_priv->listen_list)) { 759 dev_id_priv = list_entry(id_priv->listen_list.next, 760 struct rdma_id_private, listen_list); 761 cma_destroy_listen(dev_id_priv); 762 } 763 mutex_unlock(&lock); 764 } 765 766 static void cma_cancel_operation(struct rdma_id_private *id_priv, 767 enum cma_state state) 768 { 769 switch (state) { 770 case CMA_ADDR_QUERY: 771 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr); 772 break; 773 case CMA_ROUTE_QUERY: 774 cma_cancel_route(id_priv); 775 break; 776 case CMA_LISTEN: 777 if (cma_any_addr(&id_priv->id.route.addr.src_addr) && 778 !id_priv->cma_dev) 779 cma_cancel_listens(id_priv); 780 break; 781 default: 782 break; 783 } 784 } 785 786 static void cma_release_port(struct rdma_id_private *id_priv) 787 { 788 struct rdma_bind_list *bind_list = id_priv->bind_list; 789 790 if (!bind_list) 791 return; 792 793 mutex_lock(&lock); 794 hlist_del(&id_priv->node); 795 if (hlist_empty(&bind_list->owners)) { 796 idr_remove(bind_list->ps, bind_list->port); 797 kfree(bind_list); 798 } 799 mutex_unlock(&lock); 800 } 801 802 static void cma_leave_mc_groups(struct rdma_id_private *id_priv) 803 { 804 struct cma_multicast *mc; 805 806 while (!list_empty(&id_priv->mc_list)) { 807 mc = container_of(id_priv->mc_list.next, 808 struct cma_multicast, list); 809 list_del(&mc->list); 810 ib_sa_free_multicast(mc->multicast.ib); 811 kfree(mc); 812 } 813 } 814 815 void rdma_destroy_id(struct rdma_cm_id *id) 816 { 817 struct rdma_id_private *id_priv; 818 enum cma_state state; 819 820 id_priv = container_of(id, struct rdma_id_private, id); 821 state = cma_exch(id_priv, CMA_DESTROYING); 822 cma_cancel_operation(id_priv, state); 823 824 mutex_lock(&lock); 825 if (id_priv->cma_dev) { 826 mutex_unlock(&lock); 827 switch (rdma_node_get_transport(id->device->node_type)) { 828 case RDMA_TRANSPORT_IB: 829 if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib)) 830 ib_destroy_cm_id(id_priv->cm_id.ib); 831 break; 832 case RDMA_TRANSPORT_IWARP: 833 if (id_priv->cm_id.iw && !IS_ERR(id_priv->cm_id.iw)) 834 iw_destroy_cm_id(id_priv->cm_id.iw); 835 break; 836 default: 837 break; 838 } 839 cma_leave_mc_groups(id_priv); 840 mutex_lock(&lock); 841 cma_detach_from_dev(id_priv); 842 } 843 mutex_unlock(&lock); 844 845 cma_release_port(id_priv); 846 cma_deref_id(id_priv); 847 wait_for_completion(&id_priv->comp); 848 849 kfree(id_priv->id.route.path_rec); 850 kfree(id_priv); 851 } 852 EXPORT_SYMBOL(rdma_destroy_id); 853 854 static int cma_rep_recv(struct rdma_id_private *id_priv) 855 { 856 int ret; 857 858 ret = cma_modify_qp_rtr(&id_priv->id); 859 if (ret) 860 goto reject; 861 862 ret = cma_modify_qp_rts(&id_priv->id); 863 if (ret) 864 goto reject; 865 866 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0); 867 if (ret) 868 goto reject; 869 870 return 0; 871 reject: 872 cma_modify_qp_err(&id_priv->id); 873 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED, 874 NULL, 0, NULL, 0); 875 return ret; 876 } 877 878 static int cma_verify_rep(struct rdma_id_private *id_priv, void *data) 879 { 880 if (id_priv->id.ps == RDMA_PS_SDP && 881 sdp_get_majv(((struct sdp_hah *) data)->sdp_version) != 882 SDP_MAJ_VERSION) 883 return -EINVAL; 884 885 return 0; 886 } 887 888 static void cma_set_rep_event_data(struct rdma_cm_event *event, 889 struct ib_cm_rep_event_param *rep_data, 890 void *private_data) 891 { 892 event->param.conn.private_data = private_data; 893 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE; 894 event->param.conn.responder_resources = rep_data->responder_resources; 895 event->param.conn.initiator_depth = rep_data->initiator_depth; 896 event->param.conn.flow_control = rep_data->flow_control; 897 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count; 898 event->param.conn.srq = rep_data->srq; 899 event->param.conn.qp_num = rep_data->remote_qpn; 900 } 901 902 static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) 903 { 904 struct rdma_id_private *id_priv = cm_id->context; 905 struct rdma_cm_event event; 906 int ret = 0; 907 908 if (cma_disable_remove(id_priv, CMA_CONNECT)) 909 return 0; 910 911 memset(&event, 0, sizeof event); 912 switch (ib_event->event) { 913 case IB_CM_REQ_ERROR: 914 case IB_CM_REP_ERROR: 915 event.event = RDMA_CM_EVENT_UNREACHABLE; 916 event.status = -ETIMEDOUT; 917 break; 918 case IB_CM_REP_RECEIVED: 919 event.status = cma_verify_rep(id_priv, ib_event->private_data); 920 if (event.status) 921 event.event = RDMA_CM_EVENT_CONNECT_ERROR; 922 else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) { 923 event.status = cma_rep_recv(id_priv); 924 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR : 925 RDMA_CM_EVENT_ESTABLISHED; 926 } else 927 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE; 928 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd, 929 ib_event->private_data); 930 break; 931 case IB_CM_RTU_RECEIVED: 932 case IB_CM_USER_ESTABLISHED: 933 event.event = RDMA_CM_EVENT_ESTABLISHED; 934 break; 935 case IB_CM_DREQ_ERROR: 936 event.status = -ETIMEDOUT; /* fall through */ 937 case IB_CM_DREQ_RECEIVED: 938 case IB_CM_DREP_RECEIVED: 939 if (!cma_comp_exch(id_priv, CMA_CONNECT, CMA_DISCONNECT)) 940 goto out; 941 event.event = RDMA_CM_EVENT_DISCONNECTED; 942 break; 943 case IB_CM_TIMEWAIT_EXIT: 944 case IB_CM_MRA_RECEIVED: 945 /* ignore event */ 946 goto out; 947 case IB_CM_REJ_RECEIVED: 948 cma_modify_qp_err(&id_priv->id); 949 event.status = ib_event->param.rej_rcvd.reason; 950 event.event = RDMA_CM_EVENT_REJECTED; 951 event.param.conn.private_data = ib_event->private_data; 952 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE; 953 break; 954 default: 955 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d", 956 ib_event->event); 957 goto out; 958 } 959 960 ret = id_priv->id.event_handler(&id_priv->id, &event); 961 if (ret) { 962 /* Destroy the CM ID by returning a non-zero value. */ 963 id_priv->cm_id.ib = NULL; 964 cma_exch(id_priv, CMA_DESTROYING); 965 cma_enable_remove(id_priv); 966 rdma_destroy_id(&id_priv->id); 967 return ret; 968 } 969 out: 970 cma_enable_remove(id_priv); 971 return ret; 972 } 973 974 static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id, 975 struct ib_cm_event *ib_event) 976 { 977 struct rdma_id_private *id_priv; 978 struct rdma_cm_id *id; 979 struct rdma_route *rt; 980 union cma_ip_addr *src, *dst; 981 __u16 port; 982 u8 ip_ver; 983 984 if (cma_get_net_info(ib_event->private_data, listen_id->ps, 985 &ip_ver, &port, &src, &dst)) 986 goto err; 987 988 id = rdma_create_id(listen_id->event_handler, listen_id->context, 989 listen_id->ps); 990 if (IS_ERR(id)) 991 goto err; 992 993 cma_save_net_info(&id->route.addr, &listen_id->route.addr, 994 ip_ver, port, src, dst); 995 996 rt = &id->route; 997 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1; 998 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths, 999 GFP_KERNEL); 1000 if (!rt->path_rec) 1001 goto destroy_id; 1002 1003 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path; 1004 if (rt->num_paths == 2) 1005 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path; 1006 1007 ib_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid); 1008 ib_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid); 1009 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey)); 1010 rt->addr.dev_addr.dev_type = RDMA_NODE_IB_CA; 1011 1012 id_priv = container_of(id, struct rdma_id_private, id); 1013 id_priv->state = CMA_CONNECT; 1014 return id_priv; 1015 1016 destroy_id: 1017 rdma_destroy_id(id); 1018 err: 1019 return NULL; 1020 } 1021 1022 static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id, 1023 struct ib_cm_event *ib_event) 1024 { 1025 struct rdma_id_private *id_priv; 1026 struct rdma_cm_id *id; 1027 union cma_ip_addr *src, *dst; 1028 __u16 port; 1029 u8 ip_ver; 1030 int ret; 1031 1032 id = rdma_create_id(listen_id->event_handler, listen_id->context, 1033 listen_id->ps); 1034 if (IS_ERR(id)) 1035 return NULL; 1036 1037 1038 if (cma_get_net_info(ib_event->private_data, listen_id->ps, 1039 &ip_ver, &port, &src, &dst)) 1040 goto err; 1041 1042 cma_save_net_info(&id->route.addr, &listen_id->route.addr, 1043 ip_ver, port, src, dst); 1044 1045 ret = rdma_translate_ip(&id->route.addr.src_addr, 1046 &id->route.addr.dev_addr); 1047 if (ret) 1048 goto err; 1049 1050 id_priv = container_of(id, struct rdma_id_private, id); 1051 id_priv->state = CMA_CONNECT; 1052 return id_priv; 1053 err: 1054 rdma_destroy_id(id); 1055 return NULL; 1056 } 1057 1058 static void cma_set_req_event_data(struct rdma_cm_event *event, 1059 struct ib_cm_req_event_param *req_data, 1060 void *private_data, int offset) 1061 { 1062 event->param.conn.private_data = private_data + offset; 1063 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset; 1064 event->param.conn.responder_resources = req_data->responder_resources; 1065 event->param.conn.initiator_depth = req_data->initiator_depth; 1066 event->param.conn.flow_control = req_data->flow_control; 1067 event->param.conn.retry_count = req_data->retry_count; 1068 event->param.conn.rnr_retry_count = req_data->rnr_retry_count; 1069 event->param.conn.srq = req_data->srq; 1070 event->param.conn.qp_num = req_data->remote_qpn; 1071 } 1072 1073 static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) 1074 { 1075 struct rdma_id_private *listen_id, *conn_id; 1076 struct rdma_cm_event event; 1077 int offset, ret; 1078 1079 listen_id = cm_id->context; 1080 if (cma_disable_remove(listen_id, CMA_LISTEN)) 1081 return -ECONNABORTED; 1082 1083 memset(&event, 0, sizeof event); 1084 offset = cma_user_data_offset(listen_id->id.ps); 1085 event.event = RDMA_CM_EVENT_CONNECT_REQUEST; 1086 if (cma_is_ud_ps(listen_id->id.ps)) { 1087 conn_id = cma_new_udp_id(&listen_id->id, ib_event); 1088 event.param.ud.private_data = ib_event->private_data + offset; 1089 event.param.ud.private_data_len = 1090 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset; 1091 } else { 1092 conn_id = cma_new_conn_id(&listen_id->id, ib_event); 1093 cma_set_req_event_data(&event, &ib_event->param.req_rcvd, 1094 ib_event->private_data, offset); 1095 } 1096 if (!conn_id) { 1097 ret = -ENOMEM; 1098 goto out; 1099 } 1100 1101 atomic_inc(&conn_id->dev_remove); 1102 mutex_lock(&lock); 1103 ret = cma_acquire_dev(conn_id); 1104 mutex_unlock(&lock); 1105 if (ret) 1106 goto release_conn_id; 1107 1108 conn_id->cm_id.ib = cm_id; 1109 cm_id->context = conn_id; 1110 cm_id->cm_handler = cma_ib_handler; 1111 1112 ret = conn_id->id.event_handler(&conn_id->id, &event); 1113 if (!ret) 1114 goto out; 1115 1116 /* Destroy the CM ID by returning a non-zero value. */ 1117 conn_id->cm_id.ib = NULL; 1118 1119 release_conn_id: 1120 cma_exch(conn_id, CMA_DESTROYING); 1121 cma_enable_remove(conn_id); 1122 rdma_destroy_id(&conn_id->id); 1123 1124 out: 1125 cma_enable_remove(listen_id); 1126 return ret; 1127 } 1128 1129 static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr) 1130 { 1131 return cpu_to_be64(((u64)ps << 16) + be16_to_cpu(cma_port(addr))); 1132 } 1133 1134 static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr, 1135 struct ib_cm_compare_data *compare) 1136 { 1137 struct cma_hdr *cma_data, *cma_mask; 1138 struct sdp_hh *sdp_data, *sdp_mask; 1139 __u32 ip4_addr; 1140 struct in6_addr ip6_addr; 1141 1142 memset(compare, 0, sizeof *compare); 1143 cma_data = (void *) compare->data; 1144 cma_mask = (void *) compare->mask; 1145 sdp_data = (void *) compare->data; 1146 sdp_mask = (void *) compare->mask; 1147 1148 switch (addr->sa_family) { 1149 case AF_INET: 1150 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr; 1151 if (ps == RDMA_PS_SDP) { 1152 sdp_set_ip_ver(sdp_data, 4); 1153 sdp_set_ip_ver(sdp_mask, 0xF); 1154 sdp_data->dst_addr.ip4.addr = ip4_addr; 1155 sdp_mask->dst_addr.ip4.addr = ~0; 1156 } else { 1157 cma_set_ip_ver(cma_data, 4); 1158 cma_set_ip_ver(cma_mask, 0xF); 1159 cma_data->dst_addr.ip4.addr = ip4_addr; 1160 cma_mask->dst_addr.ip4.addr = ~0; 1161 } 1162 break; 1163 case AF_INET6: 1164 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr; 1165 if (ps == RDMA_PS_SDP) { 1166 sdp_set_ip_ver(sdp_data, 6); 1167 sdp_set_ip_ver(sdp_mask, 0xF); 1168 sdp_data->dst_addr.ip6 = ip6_addr; 1169 memset(&sdp_mask->dst_addr.ip6, 0xFF, 1170 sizeof sdp_mask->dst_addr.ip6); 1171 } else { 1172 cma_set_ip_ver(cma_data, 6); 1173 cma_set_ip_ver(cma_mask, 0xF); 1174 cma_data->dst_addr.ip6 = ip6_addr; 1175 memset(&cma_mask->dst_addr.ip6, 0xFF, 1176 sizeof cma_mask->dst_addr.ip6); 1177 } 1178 break; 1179 default: 1180 break; 1181 } 1182 } 1183 1184 static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event) 1185 { 1186 struct rdma_id_private *id_priv = iw_id->context; 1187 struct rdma_cm_event event; 1188 struct sockaddr_in *sin; 1189 int ret = 0; 1190 1191 if (cma_disable_remove(id_priv, CMA_CONNECT)) 1192 return 0; 1193 1194 memset(&event, 0, sizeof event); 1195 switch (iw_event->event) { 1196 case IW_CM_EVENT_CLOSE: 1197 event.event = RDMA_CM_EVENT_DISCONNECTED; 1198 break; 1199 case IW_CM_EVENT_CONNECT_REPLY: 1200 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; 1201 *sin = iw_event->local_addr; 1202 sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr; 1203 *sin = iw_event->remote_addr; 1204 switch (iw_event->status) { 1205 case 0: 1206 event.event = RDMA_CM_EVENT_ESTABLISHED; 1207 break; 1208 case -ECONNRESET: 1209 case -ECONNREFUSED: 1210 event.event = RDMA_CM_EVENT_REJECTED; 1211 break; 1212 case -ETIMEDOUT: 1213 event.event = RDMA_CM_EVENT_UNREACHABLE; 1214 break; 1215 default: 1216 event.event = RDMA_CM_EVENT_CONNECT_ERROR; 1217 break; 1218 } 1219 break; 1220 case IW_CM_EVENT_ESTABLISHED: 1221 event.event = RDMA_CM_EVENT_ESTABLISHED; 1222 break; 1223 default: 1224 BUG_ON(1); 1225 } 1226 1227 event.status = iw_event->status; 1228 event.param.conn.private_data = iw_event->private_data; 1229 event.param.conn.private_data_len = iw_event->private_data_len; 1230 ret = id_priv->id.event_handler(&id_priv->id, &event); 1231 if (ret) { 1232 /* Destroy the CM ID by returning a non-zero value. */ 1233 id_priv->cm_id.iw = NULL; 1234 cma_exch(id_priv, CMA_DESTROYING); 1235 cma_enable_remove(id_priv); 1236 rdma_destroy_id(&id_priv->id); 1237 return ret; 1238 } 1239 1240 cma_enable_remove(id_priv); 1241 return ret; 1242 } 1243 1244 static int iw_conn_req_handler(struct iw_cm_id *cm_id, 1245 struct iw_cm_event *iw_event) 1246 { 1247 struct rdma_cm_id *new_cm_id; 1248 struct rdma_id_private *listen_id, *conn_id; 1249 struct sockaddr_in *sin; 1250 struct net_device *dev = NULL; 1251 struct rdma_cm_event event; 1252 int ret; 1253 1254 listen_id = cm_id->context; 1255 if (cma_disable_remove(listen_id, CMA_LISTEN)) 1256 return -ECONNABORTED; 1257 1258 /* Create a new RDMA id for the new IW CM ID */ 1259 new_cm_id = rdma_create_id(listen_id->id.event_handler, 1260 listen_id->id.context, 1261 RDMA_PS_TCP); 1262 if (!new_cm_id) { 1263 ret = -ENOMEM; 1264 goto out; 1265 } 1266 conn_id = container_of(new_cm_id, struct rdma_id_private, id); 1267 atomic_inc(&conn_id->dev_remove); 1268 conn_id->state = CMA_CONNECT; 1269 1270 dev = ip_dev_find(iw_event->local_addr.sin_addr.s_addr); 1271 if (!dev) { 1272 ret = -EADDRNOTAVAIL; 1273 cma_enable_remove(conn_id); 1274 rdma_destroy_id(new_cm_id); 1275 goto out; 1276 } 1277 ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL); 1278 if (ret) { 1279 cma_enable_remove(conn_id); 1280 rdma_destroy_id(new_cm_id); 1281 goto out; 1282 } 1283 1284 mutex_lock(&lock); 1285 ret = cma_acquire_dev(conn_id); 1286 mutex_unlock(&lock); 1287 if (ret) { 1288 cma_enable_remove(conn_id); 1289 rdma_destroy_id(new_cm_id); 1290 goto out; 1291 } 1292 1293 conn_id->cm_id.iw = cm_id; 1294 cm_id->context = conn_id; 1295 cm_id->cm_handler = cma_iw_handler; 1296 1297 sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr; 1298 *sin = iw_event->local_addr; 1299 sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr; 1300 *sin = iw_event->remote_addr; 1301 1302 memset(&event, 0, sizeof event); 1303 event.event = RDMA_CM_EVENT_CONNECT_REQUEST; 1304 event.param.conn.private_data = iw_event->private_data; 1305 event.param.conn.private_data_len = iw_event->private_data_len; 1306 ret = conn_id->id.event_handler(&conn_id->id, &event); 1307 if (ret) { 1308 /* User wants to destroy the CM ID */ 1309 conn_id->cm_id.iw = NULL; 1310 cma_exch(conn_id, CMA_DESTROYING); 1311 cma_enable_remove(conn_id); 1312 rdma_destroy_id(&conn_id->id); 1313 } 1314 1315 out: 1316 if (dev) 1317 dev_put(dev); 1318 cma_enable_remove(listen_id); 1319 return ret; 1320 } 1321 1322 static int cma_ib_listen(struct rdma_id_private *id_priv) 1323 { 1324 struct ib_cm_compare_data compare_data; 1325 struct sockaddr *addr; 1326 __be64 svc_id; 1327 int ret; 1328 1329 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_req_handler, 1330 id_priv); 1331 if (IS_ERR(id_priv->cm_id.ib)) 1332 return PTR_ERR(id_priv->cm_id.ib); 1333 1334 addr = &id_priv->id.route.addr.src_addr; 1335 svc_id = cma_get_service_id(id_priv->id.ps, addr); 1336 if (cma_any_addr(addr)) 1337 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL); 1338 else { 1339 cma_set_compare_data(id_priv->id.ps, addr, &compare_data); 1340 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data); 1341 } 1342 1343 if (ret) { 1344 ib_destroy_cm_id(id_priv->cm_id.ib); 1345 id_priv->cm_id.ib = NULL; 1346 } 1347 1348 return ret; 1349 } 1350 1351 static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog) 1352 { 1353 int ret; 1354 struct sockaddr_in *sin; 1355 1356 id_priv->cm_id.iw = iw_create_cm_id(id_priv->id.device, 1357 iw_conn_req_handler, 1358 id_priv); 1359 if (IS_ERR(id_priv->cm_id.iw)) 1360 return PTR_ERR(id_priv->cm_id.iw); 1361 1362 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; 1363 id_priv->cm_id.iw->local_addr = *sin; 1364 1365 ret = iw_cm_listen(id_priv->cm_id.iw, backlog); 1366 1367 if (ret) { 1368 iw_destroy_cm_id(id_priv->cm_id.iw); 1369 id_priv->cm_id.iw = NULL; 1370 } 1371 1372 return ret; 1373 } 1374 1375 static int cma_listen_handler(struct rdma_cm_id *id, 1376 struct rdma_cm_event *event) 1377 { 1378 struct rdma_id_private *id_priv = id->context; 1379 1380 id->context = id_priv->id.context; 1381 id->event_handler = id_priv->id.event_handler; 1382 return id_priv->id.event_handler(id, event); 1383 } 1384 1385 static void cma_listen_on_dev(struct rdma_id_private *id_priv, 1386 struct cma_device *cma_dev) 1387 { 1388 struct rdma_id_private *dev_id_priv; 1389 struct rdma_cm_id *id; 1390 int ret; 1391 1392 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps); 1393 if (IS_ERR(id)) 1394 return; 1395 1396 dev_id_priv = container_of(id, struct rdma_id_private, id); 1397 1398 dev_id_priv->state = CMA_ADDR_BOUND; 1399 memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr, 1400 ip_addr_size(&id_priv->id.route.addr.src_addr)); 1401 1402 cma_attach_to_dev(dev_id_priv, cma_dev); 1403 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list); 1404 1405 ret = rdma_listen(id, id_priv->backlog); 1406 if (ret) 1407 goto err; 1408 1409 return; 1410 err: 1411 cma_destroy_listen(dev_id_priv); 1412 } 1413 1414 static void cma_listen_on_all(struct rdma_id_private *id_priv) 1415 { 1416 struct cma_device *cma_dev; 1417 1418 mutex_lock(&lock); 1419 list_add_tail(&id_priv->list, &listen_any_list); 1420 list_for_each_entry(cma_dev, &dev_list, list) 1421 cma_listen_on_dev(id_priv, cma_dev); 1422 mutex_unlock(&lock); 1423 } 1424 1425 static int cma_bind_any(struct rdma_cm_id *id, sa_family_t af) 1426 { 1427 struct sockaddr_in addr_in; 1428 1429 memset(&addr_in, 0, sizeof addr_in); 1430 addr_in.sin_family = af; 1431 return rdma_bind_addr(id, (struct sockaddr *) &addr_in); 1432 } 1433 1434 int rdma_listen(struct rdma_cm_id *id, int backlog) 1435 { 1436 struct rdma_id_private *id_priv; 1437 int ret; 1438 1439 id_priv = container_of(id, struct rdma_id_private, id); 1440 if (id_priv->state == CMA_IDLE) { 1441 ret = cma_bind_any(id, AF_INET); 1442 if (ret) 1443 return ret; 1444 } 1445 1446 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_LISTEN)) 1447 return -EINVAL; 1448 1449 id_priv->backlog = backlog; 1450 if (id->device) { 1451 switch (rdma_node_get_transport(id->device->node_type)) { 1452 case RDMA_TRANSPORT_IB: 1453 ret = cma_ib_listen(id_priv); 1454 if (ret) 1455 goto err; 1456 break; 1457 case RDMA_TRANSPORT_IWARP: 1458 ret = cma_iw_listen(id_priv, backlog); 1459 if (ret) 1460 goto err; 1461 break; 1462 default: 1463 ret = -ENOSYS; 1464 goto err; 1465 } 1466 } else 1467 cma_listen_on_all(id_priv); 1468 1469 return 0; 1470 err: 1471 id_priv->backlog = 0; 1472 cma_comp_exch(id_priv, CMA_LISTEN, CMA_ADDR_BOUND); 1473 return ret; 1474 } 1475 EXPORT_SYMBOL(rdma_listen); 1476 1477 static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec, 1478 void *context) 1479 { 1480 struct cma_work *work = context; 1481 struct rdma_route *route; 1482 1483 route = &work->id->id.route; 1484 1485 if (!status) { 1486 route->num_paths = 1; 1487 *route->path_rec = *path_rec; 1488 } else { 1489 work->old_state = CMA_ROUTE_QUERY; 1490 work->new_state = CMA_ADDR_RESOLVED; 1491 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR; 1492 work->event.status = status; 1493 } 1494 1495 queue_work(cma_wq, &work->work); 1496 } 1497 1498 static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms, 1499 struct cma_work *work) 1500 { 1501 struct rdma_dev_addr *addr = &id_priv->id.route.addr.dev_addr; 1502 struct ib_sa_path_rec path_rec; 1503 1504 memset(&path_rec, 0, sizeof path_rec); 1505 ib_addr_get_sgid(addr, &path_rec.sgid); 1506 ib_addr_get_dgid(addr, &path_rec.dgid); 1507 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(addr)); 1508 path_rec.numb_path = 1; 1509 path_rec.reversible = 1; 1510 1511 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device, 1512 id_priv->id.port_num, &path_rec, 1513 IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID | 1514 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH | 1515 IB_SA_PATH_REC_REVERSIBLE, 1516 timeout_ms, GFP_KERNEL, 1517 cma_query_handler, work, &id_priv->query); 1518 1519 return (id_priv->query_id < 0) ? id_priv->query_id : 0; 1520 } 1521 1522 static void cma_work_handler(struct work_struct *_work) 1523 { 1524 struct cma_work *work = container_of(_work, struct cma_work, work); 1525 struct rdma_id_private *id_priv = work->id; 1526 int destroy = 0; 1527 1528 atomic_inc(&id_priv->dev_remove); 1529 if (!cma_comp_exch(id_priv, work->old_state, work->new_state)) 1530 goto out; 1531 1532 if (id_priv->id.event_handler(&id_priv->id, &work->event)) { 1533 cma_exch(id_priv, CMA_DESTROYING); 1534 destroy = 1; 1535 } 1536 out: 1537 cma_enable_remove(id_priv); 1538 cma_deref_id(id_priv); 1539 if (destroy) 1540 rdma_destroy_id(&id_priv->id); 1541 kfree(work); 1542 } 1543 1544 static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms) 1545 { 1546 struct rdma_route *route = &id_priv->id.route; 1547 struct cma_work *work; 1548 int ret; 1549 1550 work = kzalloc(sizeof *work, GFP_KERNEL); 1551 if (!work) 1552 return -ENOMEM; 1553 1554 work->id = id_priv; 1555 INIT_WORK(&work->work, cma_work_handler); 1556 work->old_state = CMA_ROUTE_QUERY; 1557 work->new_state = CMA_ROUTE_RESOLVED; 1558 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 1559 1560 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL); 1561 if (!route->path_rec) { 1562 ret = -ENOMEM; 1563 goto err1; 1564 } 1565 1566 ret = cma_query_ib_route(id_priv, timeout_ms, work); 1567 if (ret) 1568 goto err2; 1569 1570 return 0; 1571 err2: 1572 kfree(route->path_rec); 1573 route->path_rec = NULL; 1574 err1: 1575 kfree(work); 1576 return ret; 1577 } 1578 1579 int rdma_set_ib_paths(struct rdma_cm_id *id, 1580 struct ib_sa_path_rec *path_rec, int num_paths) 1581 { 1582 struct rdma_id_private *id_priv; 1583 int ret; 1584 1585 id_priv = container_of(id, struct rdma_id_private, id); 1586 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_RESOLVED)) 1587 return -EINVAL; 1588 1589 id->route.path_rec = kmalloc(sizeof *path_rec * num_paths, GFP_KERNEL); 1590 if (!id->route.path_rec) { 1591 ret = -ENOMEM; 1592 goto err; 1593 } 1594 1595 memcpy(id->route.path_rec, path_rec, sizeof *path_rec * num_paths); 1596 return 0; 1597 err: 1598 cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_ADDR_RESOLVED); 1599 return ret; 1600 } 1601 EXPORT_SYMBOL(rdma_set_ib_paths); 1602 1603 static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms) 1604 { 1605 struct cma_work *work; 1606 1607 work = kzalloc(sizeof *work, GFP_KERNEL); 1608 if (!work) 1609 return -ENOMEM; 1610 1611 work->id = id_priv; 1612 INIT_WORK(&work->work, cma_work_handler); 1613 work->old_state = CMA_ROUTE_QUERY; 1614 work->new_state = CMA_ROUTE_RESOLVED; 1615 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 1616 queue_work(cma_wq, &work->work); 1617 return 0; 1618 } 1619 1620 int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms) 1621 { 1622 struct rdma_id_private *id_priv; 1623 int ret; 1624 1625 id_priv = container_of(id, struct rdma_id_private, id); 1626 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_QUERY)) 1627 return -EINVAL; 1628 1629 atomic_inc(&id_priv->refcount); 1630 switch (rdma_node_get_transport(id->device->node_type)) { 1631 case RDMA_TRANSPORT_IB: 1632 ret = cma_resolve_ib_route(id_priv, timeout_ms); 1633 break; 1634 case RDMA_TRANSPORT_IWARP: 1635 ret = cma_resolve_iw_route(id_priv, timeout_ms); 1636 break; 1637 default: 1638 ret = -ENOSYS; 1639 break; 1640 } 1641 if (ret) 1642 goto err; 1643 1644 return 0; 1645 err: 1646 cma_comp_exch(id_priv, CMA_ROUTE_QUERY, CMA_ADDR_RESOLVED); 1647 cma_deref_id(id_priv); 1648 return ret; 1649 } 1650 EXPORT_SYMBOL(rdma_resolve_route); 1651 1652 static int cma_bind_loopback(struct rdma_id_private *id_priv) 1653 { 1654 struct cma_device *cma_dev; 1655 struct ib_port_attr port_attr; 1656 union ib_gid gid; 1657 u16 pkey; 1658 int ret; 1659 u8 p; 1660 1661 mutex_lock(&lock); 1662 if (list_empty(&dev_list)) { 1663 ret = -ENODEV; 1664 goto out; 1665 } 1666 list_for_each_entry(cma_dev, &dev_list, list) 1667 for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p) 1668 if (!ib_query_port(cma_dev->device, p, &port_attr) && 1669 port_attr.state == IB_PORT_ACTIVE) 1670 goto port_found; 1671 1672 p = 1; 1673 cma_dev = list_entry(dev_list.next, struct cma_device, list); 1674 1675 port_found: 1676 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid); 1677 if (ret) 1678 goto out; 1679 1680 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey); 1681 if (ret) 1682 goto out; 1683 1684 ib_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid); 1685 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey); 1686 id_priv->id.port_num = p; 1687 cma_attach_to_dev(id_priv, cma_dev); 1688 out: 1689 mutex_unlock(&lock); 1690 return ret; 1691 } 1692 1693 static void addr_handler(int status, struct sockaddr *src_addr, 1694 struct rdma_dev_addr *dev_addr, void *context) 1695 { 1696 struct rdma_id_private *id_priv = context; 1697 struct rdma_cm_event event; 1698 1699 memset(&event, 0, sizeof event); 1700 atomic_inc(&id_priv->dev_remove); 1701 1702 /* 1703 * Grab mutex to block rdma_destroy_id() from removing the device while 1704 * we're trying to acquire it. 1705 */ 1706 mutex_lock(&lock); 1707 if (!cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_RESOLVED)) { 1708 mutex_unlock(&lock); 1709 goto out; 1710 } 1711 1712 if (!status && !id_priv->cma_dev) 1713 status = cma_acquire_dev(id_priv); 1714 mutex_unlock(&lock); 1715 1716 if (status) { 1717 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ADDR_BOUND)) 1718 goto out; 1719 event.event = RDMA_CM_EVENT_ADDR_ERROR; 1720 event.status = status; 1721 } else { 1722 memcpy(&id_priv->id.route.addr.src_addr, src_addr, 1723 ip_addr_size(src_addr)); 1724 event.event = RDMA_CM_EVENT_ADDR_RESOLVED; 1725 } 1726 1727 if (id_priv->id.event_handler(&id_priv->id, &event)) { 1728 cma_exch(id_priv, CMA_DESTROYING); 1729 cma_enable_remove(id_priv); 1730 cma_deref_id(id_priv); 1731 rdma_destroy_id(&id_priv->id); 1732 return; 1733 } 1734 out: 1735 cma_enable_remove(id_priv); 1736 cma_deref_id(id_priv); 1737 } 1738 1739 static int cma_resolve_loopback(struct rdma_id_private *id_priv) 1740 { 1741 struct cma_work *work; 1742 struct sockaddr_in *src_in, *dst_in; 1743 union ib_gid gid; 1744 int ret; 1745 1746 work = kzalloc(sizeof *work, GFP_KERNEL); 1747 if (!work) 1748 return -ENOMEM; 1749 1750 if (!id_priv->cma_dev) { 1751 ret = cma_bind_loopback(id_priv); 1752 if (ret) 1753 goto err; 1754 } 1755 1756 ib_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid); 1757 ib_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid); 1758 1759 if (cma_zero_addr(&id_priv->id.route.addr.src_addr)) { 1760 src_in = (struct sockaddr_in *)&id_priv->id.route.addr.src_addr; 1761 dst_in = (struct sockaddr_in *)&id_priv->id.route.addr.dst_addr; 1762 src_in->sin_family = dst_in->sin_family; 1763 src_in->sin_addr.s_addr = dst_in->sin_addr.s_addr; 1764 } 1765 1766 work->id = id_priv; 1767 INIT_WORK(&work->work, cma_work_handler); 1768 work->old_state = CMA_ADDR_QUERY; 1769 work->new_state = CMA_ADDR_RESOLVED; 1770 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED; 1771 queue_work(cma_wq, &work->work); 1772 return 0; 1773 err: 1774 kfree(work); 1775 return ret; 1776 } 1777 1778 static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, 1779 struct sockaddr *dst_addr) 1780 { 1781 if (src_addr && src_addr->sa_family) 1782 return rdma_bind_addr(id, src_addr); 1783 else 1784 return cma_bind_any(id, dst_addr->sa_family); 1785 } 1786 1787 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, 1788 struct sockaddr *dst_addr, int timeout_ms) 1789 { 1790 struct rdma_id_private *id_priv; 1791 int ret; 1792 1793 id_priv = container_of(id, struct rdma_id_private, id); 1794 if (id_priv->state == CMA_IDLE) { 1795 ret = cma_bind_addr(id, src_addr, dst_addr); 1796 if (ret) 1797 return ret; 1798 } 1799 1800 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_ADDR_QUERY)) 1801 return -EINVAL; 1802 1803 atomic_inc(&id_priv->refcount); 1804 memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr)); 1805 if (cma_any_addr(dst_addr)) 1806 ret = cma_resolve_loopback(id_priv); 1807 else 1808 ret = rdma_resolve_ip(&addr_client, &id->route.addr.src_addr, 1809 dst_addr, &id->route.addr.dev_addr, 1810 timeout_ms, addr_handler, id_priv); 1811 if (ret) 1812 goto err; 1813 1814 return 0; 1815 err: 1816 cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_BOUND); 1817 cma_deref_id(id_priv); 1818 return ret; 1819 } 1820 EXPORT_SYMBOL(rdma_resolve_addr); 1821 1822 static void cma_bind_port(struct rdma_bind_list *bind_list, 1823 struct rdma_id_private *id_priv) 1824 { 1825 struct sockaddr_in *sin; 1826 1827 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; 1828 sin->sin_port = htons(bind_list->port); 1829 id_priv->bind_list = bind_list; 1830 hlist_add_head(&id_priv->node, &bind_list->owners); 1831 } 1832 1833 static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv, 1834 unsigned short snum) 1835 { 1836 struct rdma_bind_list *bind_list; 1837 int port, ret; 1838 1839 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL); 1840 if (!bind_list) 1841 return -ENOMEM; 1842 1843 do { 1844 ret = idr_get_new_above(ps, bind_list, snum, &port); 1845 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL)); 1846 1847 if (ret) 1848 goto err1; 1849 1850 if (port != snum) { 1851 ret = -EADDRNOTAVAIL; 1852 goto err2; 1853 } 1854 1855 bind_list->ps = ps; 1856 bind_list->port = (unsigned short) port; 1857 cma_bind_port(bind_list, id_priv); 1858 return 0; 1859 err2: 1860 idr_remove(ps, port); 1861 err1: 1862 kfree(bind_list); 1863 return ret; 1864 } 1865 1866 static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv) 1867 { 1868 struct rdma_bind_list *bind_list; 1869 int port, ret; 1870 1871 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL); 1872 if (!bind_list) 1873 return -ENOMEM; 1874 1875 retry: 1876 do { 1877 ret = idr_get_new_above(ps, bind_list, next_port, &port); 1878 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL)); 1879 1880 if (ret) 1881 goto err1; 1882 1883 if (port > sysctl_local_port_range[1]) { 1884 if (next_port != sysctl_local_port_range[0]) { 1885 idr_remove(ps, port); 1886 next_port = sysctl_local_port_range[0]; 1887 goto retry; 1888 } 1889 ret = -EADDRNOTAVAIL; 1890 goto err2; 1891 } 1892 1893 if (port == sysctl_local_port_range[1]) 1894 next_port = sysctl_local_port_range[0]; 1895 else 1896 next_port = port + 1; 1897 1898 bind_list->ps = ps; 1899 bind_list->port = (unsigned short) port; 1900 cma_bind_port(bind_list, id_priv); 1901 return 0; 1902 err2: 1903 idr_remove(ps, port); 1904 err1: 1905 kfree(bind_list); 1906 return ret; 1907 } 1908 1909 static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv) 1910 { 1911 struct rdma_id_private *cur_id; 1912 struct sockaddr_in *sin, *cur_sin; 1913 struct rdma_bind_list *bind_list; 1914 struct hlist_node *node; 1915 unsigned short snum; 1916 1917 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; 1918 snum = ntohs(sin->sin_port); 1919 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE)) 1920 return -EACCES; 1921 1922 bind_list = idr_find(ps, snum); 1923 if (!bind_list) 1924 return cma_alloc_port(ps, id_priv, snum); 1925 1926 /* 1927 * We don't support binding to any address if anyone is bound to 1928 * a specific address on the same port. 1929 */ 1930 if (cma_any_addr(&id_priv->id.route.addr.src_addr)) 1931 return -EADDRNOTAVAIL; 1932 1933 hlist_for_each_entry(cur_id, node, &bind_list->owners, node) { 1934 if (cma_any_addr(&cur_id->id.route.addr.src_addr)) 1935 return -EADDRNOTAVAIL; 1936 1937 cur_sin = (struct sockaddr_in *) &cur_id->id.route.addr.src_addr; 1938 if (sin->sin_addr.s_addr == cur_sin->sin_addr.s_addr) 1939 return -EADDRINUSE; 1940 } 1941 1942 cma_bind_port(bind_list, id_priv); 1943 return 0; 1944 } 1945 1946 static int cma_get_port(struct rdma_id_private *id_priv) 1947 { 1948 struct idr *ps; 1949 int ret; 1950 1951 switch (id_priv->id.ps) { 1952 case RDMA_PS_SDP: 1953 ps = &sdp_ps; 1954 break; 1955 case RDMA_PS_TCP: 1956 ps = &tcp_ps; 1957 break; 1958 case RDMA_PS_UDP: 1959 ps = &udp_ps; 1960 break; 1961 case RDMA_PS_IPOIB: 1962 ps = &ipoib_ps; 1963 break; 1964 default: 1965 return -EPROTONOSUPPORT; 1966 } 1967 1968 mutex_lock(&lock); 1969 if (cma_any_port(&id_priv->id.route.addr.src_addr)) 1970 ret = cma_alloc_any_port(ps, id_priv); 1971 else 1972 ret = cma_use_port(ps, id_priv); 1973 mutex_unlock(&lock); 1974 1975 return ret; 1976 } 1977 1978 int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr) 1979 { 1980 struct rdma_id_private *id_priv; 1981 int ret; 1982 1983 if (addr->sa_family != AF_INET) 1984 return -EAFNOSUPPORT; 1985 1986 id_priv = container_of(id, struct rdma_id_private, id); 1987 if (!cma_comp_exch(id_priv, CMA_IDLE, CMA_ADDR_BOUND)) 1988 return -EINVAL; 1989 1990 if (!cma_any_addr(addr)) { 1991 ret = rdma_translate_ip(addr, &id->route.addr.dev_addr); 1992 if (ret) 1993 goto err1; 1994 1995 mutex_lock(&lock); 1996 ret = cma_acquire_dev(id_priv); 1997 mutex_unlock(&lock); 1998 if (ret) 1999 goto err1; 2000 } 2001 2002 memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr)); 2003 ret = cma_get_port(id_priv); 2004 if (ret) 2005 goto err2; 2006 2007 return 0; 2008 err2: 2009 if (!cma_any_addr(addr)) { 2010 mutex_lock(&lock); 2011 cma_detach_from_dev(id_priv); 2012 mutex_unlock(&lock); 2013 } 2014 err1: 2015 cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_IDLE); 2016 return ret; 2017 } 2018 EXPORT_SYMBOL(rdma_bind_addr); 2019 2020 static int cma_format_hdr(void *hdr, enum rdma_port_space ps, 2021 struct rdma_route *route) 2022 { 2023 struct sockaddr_in *src4, *dst4; 2024 struct cma_hdr *cma_hdr; 2025 struct sdp_hh *sdp_hdr; 2026 2027 src4 = (struct sockaddr_in *) &route->addr.src_addr; 2028 dst4 = (struct sockaddr_in *) &route->addr.dst_addr; 2029 2030 switch (ps) { 2031 case RDMA_PS_SDP: 2032 sdp_hdr = hdr; 2033 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION) 2034 return -EINVAL; 2035 sdp_set_ip_ver(sdp_hdr, 4); 2036 sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; 2037 sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; 2038 sdp_hdr->port = src4->sin_port; 2039 break; 2040 default: 2041 cma_hdr = hdr; 2042 cma_hdr->cma_version = CMA_VERSION; 2043 cma_set_ip_ver(cma_hdr, 4); 2044 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; 2045 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; 2046 cma_hdr->port = src4->sin_port; 2047 break; 2048 } 2049 return 0; 2050 } 2051 2052 static int cma_sidr_rep_handler(struct ib_cm_id *cm_id, 2053 struct ib_cm_event *ib_event) 2054 { 2055 struct rdma_id_private *id_priv = cm_id->context; 2056 struct rdma_cm_event event; 2057 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd; 2058 int ret = 0; 2059 2060 if (cma_disable_remove(id_priv, CMA_CONNECT)) 2061 return 0; 2062 2063 memset(&event, 0, sizeof event); 2064 switch (ib_event->event) { 2065 case IB_CM_SIDR_REQ_ERROR: 2066 event.event = RDMA_CM_EVENT_UNREACHABLE; 2067 event.status = -ETIMEDOUT; 2068 break; 2069 case IB_CM_SIDR_REP_RECEIVED: 2070 event.param.ud.private_data = ib_event->private_data; 2071 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE; 2072 if (rep->status != IB_SIDR_SUCCESS) { 2073 event.event = RDMA_CM_EVENT_UNREACHABLE; 2074 event.status = ib_event->param.sidr_rep_rcvd.status; 2075 break; 2076 } 2077 if (id_priv->qkey != rep->qkey) { 2078 event.event = RDMA_CM_EVENT_UNREACHABLE; 2079 event.status = -EINVAL; 2080 break; 2081 } 2082 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num, 2083 id_priv->id.route.path_rec, 2084 &event.param.ud.ah_attr); 2085 event.param.ud.qp_num = rep->qpn; 2086 event.param.ud.qkey = rep->qkey; 2087 event.event = RDMA_CM_EVENT_ESTABLISHED; 2088 event.status = 0; 2089 break; 2090 default: 2091 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d", 2092 ib_event->event); 2093 goto out; 2094 } 2095 2096 ret = id_priv->id.event_handler(&id_priv->id, &event); 2097 if (ret) { 2098 /* Destroy the CM ID by returning a non-zero value. */ 2099 id_priv->cm_id.ib = NULL; 2100 cma_exch(id_priv, CMA_DESTROYING); 2101 cma_enable_remove(id_priv); 2102 rdma_destroy_id(&id_priv->id); 2103 return ret; 2104 } 2105 out: 2106 cma_enable_remove(id_priv); 2107 return ret; 2108 } 2109 2110 static int cma_resolve_ib_udp(struct rdma_id_private *id_priv, 2111 struct rdma_conn_param *conn_param) 2112 { 2113 struct ib_cm_sidr_req_param req; 2114 struct rdma_route *route; 2115 int ret; 2116 2117 req.private_data_len = sizeof(struct cma_hdr) + 2118 conn_param->private_data_len; 2119 req.private_data = kzalloc(req.private_data_len, GFP_ATOMIC); 2120 if (!req.private_data) 2121 return -ENOMEM; 2122 2123 if (conn_param->private_data && conn_param->private_data_len) 2124 memcpy((void *) req.private_data + sizeof(struct cma_hdr), 2125 conn_param->private_data, conn_param->private_data_len); 2126 2127 route = &id_priv->id.route; 2128 ret = cma_format_hdr((void *) req.private_data, id_priv->id.ps, route); 2129 if (ret) 2130 goto out; 2131 2132 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, 2133 cma_sidr_rep_handler, id_priv); 2134 if (IS_ERR(id_priv->cm_id.ib)) { 2135 ret = PTR_ERR(id_priv->cm_id.ib); 2136 goto out; 2137 } 2138 2139 req.path = route->path_rec; 2140 req.service_id = cma_get_service_id(id_priv->id.ps, 2141 &route->addr.dst_addr); 2142 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8); 2143 req.max_cm_retries = CMA_MAX_CM_RETRIES; 2144 2145 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req); 2146 if (ret) { 2147 ib_destroy_cm_id(id_priv->cm_id.ib); 2148 id_priv->cm_id.ib = NULL; 2149 } 2150 out: 2151 kfree(req.private_data); 2152 return ret; 2153 } 2154 2155 static int cma_connect_ib(struct rdma_id_private *id_priv, 2156 struct rdma_conn_param *conn_param) 2157 { 2158 struct ib_cm_req_param req; 2159 struct rdma_route *route; 2160 void *private_data; 2161 int offset, ret; 2162 2163 memset(&req, 0, sizeof req); 2164 offset = cma_user_data_offset(id_priv->id.ps); 2165 req.private_data_len = offset + conn_param->private_data_len; 2166 private_data = kzalloc(req.private_data_len, GFP_ATOMIC); 2167 if (!private_data) 2168 return -ENOMEM; 2169 2170 if (conn_param->private_data && conn_param->private_data_len) 2171 memcpy(private_data + offset, conn_param->private_data, 2172 conn_param->private_data_len); 2173 2174 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_ib_handler, 2175 id_priv); 2176 if (IS_ERR(id_priv->cm_id.ib)) { 2177 ret = PTR_ERR(id_priv->cm_id.ib); 2178 goto out; 2179 } 2180 2181 route = &id_priv->id.route; 2182 ret = cma_format_hdr(private_data, id_priv->id.ps, route); 2183 if (ret) 2184 goto out; 2185 req.private_data = private_data; 2186 2187 req.primary_path = &route->path_rec[0]; 2188 if (route->num_paths == 2) 2189 req.alternate_path = &route->path_rec[1]; 2190 2191 req.service_id = cma_get_service_id(id_priv->id.ps, 2192 &route->addr.dst_addr); 2193 req.qp_num = id_priv->qp_num; 2194 req.qp_type = IB_QPT_RC; 2195 req.starting_psn = id_priv->seq_num; 2196 req.responder_resources = conn_param->responder_resources; 2197 req.initiator_depth = conn_param->initiator_depth; 2198 req.flow_control = conn_param->flow_control; 2199 req.retry_count = conn_param->retry_count; 2200 req.rnr_retry_count = conn_param->rnr_retry_count; 2201 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; 2202 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; 2203 req.max_cm_retries = CMA_MAX_CM_RETRIES; 2204 req.srq = id_priv->srq ? 1 : 0; 2205 2206 ret = ib_send_cm_req(id_priv->cm_id.ib, &req); 2207 out: 2208 if (ret && !IS_ERR(id_priv->cm_id.ib)) { 2209 ib_destroy_cm_id(id_priv->cm_id.ib); 2210 id_priv->cm_id.ib = NULL; 2211 } 2212 2213 kfree(private_data); 2214 return ret; 2215 } 2216 2217 static int cma_connect_iw(struct rdma_id_private *id_priv, 2218 struct rdma_conn_param *conn_param) 2219 { 2220 struct iw_cm_id *cm_id; 2221 struct sockaddr_in* sin; 2222 int ret; 2223 struct iw_cm_conn_param iw_param; 2224 2225 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv); 2226 if (IS_ERR(cm_id)) { 2227 ret = PTR_ERR(cm_id); 2228 goto out; 2229 } 2230 2231 id_priv->cm_id.iw = cm_id; 2232 2233 sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr; 2234 cm_id->local_addr = *sin; 2235 2236 sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr; 2237 cm_id->remote_addr = *sin; 2238 2239 ret = cma_modify_qp_rtr(&id_priv->id); 2240 if (ret) 2241 goto out; 2242 2243 iw_param.ord = conn_param->initiator_depth; 2244 iw_param.ird = conn_param->responder_resources; 2245 iw_param.private_data = conn_param->private_data; 2246 iw_param.private_data_len = conn_param->private_data_len; 2247 if (id_priv->id.qp) 2248 iw_param.qpn = id_priv->qp_num; 2249 else 2250 iw_param.qpn = conn_param->qp_num; 2251 ret = iw_cm_connect(cm_id, &iw_param); 2252 out: 2253 if (ret && !IS_ERR(cm_id)) { 2254 iw_destroy_cm_id(cm_id); 2255 id_priv->cm_id.iw = NULL; 2256 } 2257 return ret; 2258 } 2259 2260 int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) 2261 { 2262 struct rdma_id_private *id_priv; 2263 int ret; 2264 2265 id_priv = container_of(id, struct rdma_id_private, id); 2266 if (!cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_CONNECT)) 2267 return -EINVAL; 2268 2269 if (!id->qp) { 2270 id_priv->qp_num = conn_param->qp_num; 2271 id_priv->srq = conn_param->srq; 2272 } 2273 2274 switch (rdma_node_get_transport(id->device->node_type)) { 2275 case RDMA_TRANSPORT_IB: 2276 if (cma_is_ud_ps(id->ps)) 2277 ret = cma_resolve_ib_udp(id_priv, conn_param); 2278 else 2279 ret = cma_connect_ib(id_priv, conn_param); 2280 break; 2281 case RDMA_TRANSPORT_IWARP: 2282 ret = cma_connect_iw(id_priv, conn_param); 2283 break; 2284 default: 2285 ret = -ENOSYS; 2286 break; 2287 } 2288 if (ret) 2289 goto err; 2290 2291 return 0; 2292 err: 2293 cma_comp_exch(id_priv, CMA_CONNECT, CMA_ROUTE_RESOLVED); 2294 return ret; 2295 } 2296 EXPORT_SYMBOL(rdma_connect); 2297 2298 static int cma_accept_ib(struct rdma_id_private *id_priv, 2299 struct rdma_conn_param *conn_param) 2300 { 2301 struct ib_cm_rep_param rep; 2302 struct ib_qp_attr qp_attr; 2303 int qp_attr_mask, ret; 2304 2305 if (id_priv->id.qp) { 2306 ret = cma_modify_qp_rtr(&id_priv->id); 2307 if (ret) 2308 goto out; 2309 2310 qp_attr.qp_state = IB_QPS_RTS; 2311 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, &qp_attr, 2312 &qp_attr_mask); 2313 if (ret) 2314 goto out; 2315 2316 qp_attr.max_rd_atomic = conn_param->initiator_depth; 2317 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); 2318 if (ret) 2319 goto out; 2320 } 2321 2322 memset(&rep, 0, sizeof rep); 2323 rep.qp_num = id_priv->qp_num; 2324 rep.starting_psn = id_priv->seq_num; 2325 rep.private_data = conn_param->private_data; 2326 rep.private_data_len = conn_param->private_data_len; 2327 rep.responder_resources = conn_param->responder_resources; 2328 rep.initiator_depth = conn_param->initiator_depth; 2329 rep.target_ack_delay = CMA_CM_RESPONSE_TIMEOUT; 2330 rep.failover_accepted = 0; 2331 rep.flow_control = conn_param->flow_control; 2332 rep.rnr_retry_count = conn_param->rnr_retry_count; 2333 rep.srq = id_priv->srq ? 1 : 0; 2334 2335 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep); 2336 out: 2337 return ret; 2338 } 2339 2340 static int cma_accept_iw(struct rdma_id_private *id_priv, 2341 struct rdma_conn_param *conn_param) 2342 { 2343 struct iw_cm_conn_param iw_param; 2344 int ret; 2345 2346 ret = cma_modify_qp_rtr(&id_priv->id); 2347 if (ret) 2348 return ret; 2349 2350 iw_param.ord = conn_param->initiator_depth; 2351 iw_param.ird = conn_param->responder_resources; 2352 iw_param.private_data = conn_param->private_data; 2353 iw_param.private_data_len = conn_param->private_data_len; 2354 if (id_priv->id.qp) { 2355 iw_param.qpn = id_priv->qp_num; 2356 } else 2357 iw_param.qpn = conn_param->qp_num; 2358 2359 return iw_cm_accept(id_priv->cm_id.iw, &iw_param); 2360 } 2361 2362 static int cma_send_sidr_rep(struct rdma_id_private *id_priv, 2363 enum ib_cm_sidr_status status, 2364 const void *private_data, int private_data_len) 2365 { 2366 struct ib_cm_sidr_rep_param rep; 2367 2368 memset(&rep, 0, sizeof rep); 2369 rep.status = status; 2370 if (status == IB_SIDR_SUCCESS) { 2371 rep.qp_num = id_priv->qp_num; 2372 rep.qkey = id_priv->qkey; 2373 } 2374 rep.private_data = private_data; 2375 rep.private_data_len = private_data_len; 2376 2377 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep); 2378 } 2379 2380 int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) 2381 { 2382 struct rdma_id_private *id_priv; 2383 int ret; 2384 2385 id_priv = container_of(id, struct rdma_id_private, id); 2386 if (!cma_comp(id_priv, CMA_CONNECT)) 2387 return -EINVAL; 2388 2389 if (!id->qp && conn_param) { 2390 id_priv->qp_num = conn_param->qp_num; 2391 id_priv->srq = conn_param->srq; 2392 } 2393 2394 switch (rdma_node_get_transport(id->device->node_type)) { 2395 case RDMA_TRANSPORT_IB: 2396 if (cma_is_ud_ps(id->ps)) 2397 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS, 2398 conn_param->private_data, 2399 conn_param->private_data_len); 2400 else if (conn_param) 2401 ret = cma_accept_ib(id_priv, conn_param); 2402 else 2403 ret = cma_rep_recv(id_priv); 2404 break; 2405 case RDMA_TRANSPORT_IWARP: 2406 ret = cma_accept_iw(id_priv, conn_param); 2407 break; 2408 default: 2409 ret = -ENOSYS; 2410 break; 2411 } 2412 2413 if (ret) 2414 goto reject; 2415 2416 return 0; 2417 reject: 2418 cma_modify_qp_err(id); 2419 rdma_reject(id, NULL, 0); 2420 return ret; 2421 } 2422 EXPORT_SYMBOL(rdma_accept); 2423 2424 int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event) 2425 { 2426 struct rdma_id_private *id_priv; 2427 int ret; 2428 2429 id_priv = container_of(id, struct rdma_id_private, id); 2430 if (!cma_has_cm_dev(id_priv)) 2431 return -EINVAL; 2432 2433 switch (id->device->node_type) { 2434 case RDMA_NODE_IB_CA: 2435 ret = ib_cm_notify(id_priv->cm_id.ib, event); 2436 break; 2437 default: 2438 ret = 0; 2439 break; 2440 } 2441 return ret; 2442 } 2443 EXPORT_SYMBOL(rdma_notify); 2444 2445 int rdma_reject(struct rdma_cm_id *id, const void *private_data, 2446 u8 private_data_len) 2447 { 2448 struct rdma_id_private *id_priv; 2449 int ret; 2450 2451 id_priv = container_of(id, struct rdma_id_private, id); 2452 if (!cma_has_cm_dev(id_priv)) 2453 return -EINVAL; 2454 2455 switch (rdma_node_get_transport(id->device->node_type)) { 2456 case RDMA_TRANSPORT_IB: 2457 if (cma_is_ud_ps(id->ps)) 2458 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 2459 private_data, private_data_len); 2460 else 2461 ret = ib_send_cm_rej(id_priv->cm_id.ib, 2462 IB_CM_REJ_CONSUMER_DEFINED, NULL, 2463 0, private_data, private_data_len); 2464 break; 2465 case RDMA_TRANSPORT_IWARP: 2466 ret = iw_cm_reject(id_priv->cm_id.iw, 2467 private_data, private_data_len); 2468 break; 2469 default: 2470 ret = -ENOSYS; 2471 break; 2472 } 2473 return ret; 2474 } 2475 EXPORT_SYMBOL(rdma_reject); 2476 2477 int rdma_disconnect(struct rdma_cm_id *id) 2478 { 2479 struct rdma_id_private *id_priv; 2480 int ret; 2481 2482 id_priv = container_of(id, struct rdma_id_private, id); 2483 if (!cma_has_cm_dev(id_priv)) 2484 return -EINVAL; 2485 2486 switch (rdma_node_get_transport(id->device->node_type)) { 2487 case RDMA_TRANSPORT_IB: 2488 ret = cma_modify_qp_err(id); 2489 if (ret) 2490 goto out; 2491 /* Initiate or respond to a disconnect. */ 2492 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0)) 2493 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0); 2494 break; 2495 case RDMA_TRANSPORT_IWARP: 2496 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0); 2497 break; 2498 default: 2499 ret = -EINVAL; 2500 break; 2501 } 2502 out: 2503 return ret; 2504 } 2505 EXPORT_SYMBOL(rdma_disconnect); 2506 2507 static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast) 2508 { 2509 struct rdma_id_private *id_priv; 2510 struct cma_multicast *mc = multicast->context; 2511 struct rdma_cm_event event; 2512 int ret; 2513 2514 id_priv = mc->id_priv; 2515 if (cma_disable_remove(id_priv, CMA_ADDR_BOUND) && 2516 cma_disable_remove(id_priv, CMA_ADDR_RESOLVED)) 2517 return 0; 2518 2519 if (!status && id_priv->id.qp) 2520 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid, 2521 multicast->rec.mlid); 2522 2523 memset(&event, 0, sizeof event); 2524 event.status = status; 2525 event.param.ud.private_data = mc->context; 2526 if (!status) { 2527 event.event = RDMA_CM_EVENT_MULTICAST_JOIN; 2528 ib_init_ah_from_mcmember(id_priv->id.device, 2529 id_priv->id.port_num, &multicast->rec, 2530 &event.param.ud.ah_attr); 2531 event.param.ud.qp_num = 0xFFFFFF; 2532 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey); 2533 } else 2534 event.event = RDMA_CM_EVENT_MULTICAST_ERROR; 2535 2536 ret = id_priv->id.event_handler(&id_priv->id, &event); 2537 if (ret) { 2538 cma_exch(id_priv, CMA_DESTROYING); 2539 cma_enable_remove(id_priv); 2540 rdma_destroy_id(&id_priv->id); 2541 return 0; 2542 } 2543 2544 cma_enable_remove(id_priv); 2545 return 0; 2546 } 2547 2548 static void cma_set_mgid(struct rdma_id_private *id_priv, 2549 struct sockaddr *addr, union ib_gid *mgid) 2550 { 2551 unsigned char mc_map[MAX_ADDR_LEN]; 2552 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 2553 struct sockaddr_in *sin = (struct sockaddr_in *) addr; 2554 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr; 2555 2556 if (cma_any_addr(addr)) { 2557 memset(mgid, 0, sizeof *mgid); 2558 } else if ((addr->sa_family == AF_INET6) && 2559 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFF10A01B) == 2560 0xFF10A01B)) { 2561 /* IPv6 address is an SA assigned MGID. */ 2562 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid); 2563 } else { 2564 ip_ib_mc_map(sin->sin_addr.s_addr, mc_map); 2565 if (id_priv->id.ps == RDMA_PS_UDP) 2566 mc_map[7] = 0x01; /* Use RDMA CM signature */ 2567 mc_map[8] = ib_addr_get_pkey(dev_addr) >> 8; 2568 mc_map[9] = (unsigned char) ib_addr_get_pkey(dev_addr); 2569 *mgid = *(union ib_gid *) (mc_map + 4); 2570 } 2571 } 2572 2573 static int cma_join_ib_multicast(struct rdma_id_private *id_priv, 2574 struct cma_multicast *mc) 2575 { 2576 struct ib_sa_mcmember_rec rec; 2577 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 2578 ib_sa_comp_mask comp_mask; 2579 int ret; 2580 2581 ib_addr_get_mgid(dev_addr, &rec.mgid); 2582 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num, 2583 &rec.mgid, &rec); 2584 if (ret) 2585 return ret; 2586 2587 cma_set_mgid(id_priv, &mc->addr, &rec.mgid); 2588 if (id_priv->id.ps == RDMA_PS_UDP) 2589 rec.qkey = cpu_to_be32(RDMA_UDP_QKEY); 2590 ib_addr_get_sgid(dev_addr, &rec.port_gid); 2591 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); 2592 rec.join_state = 1; 2593 2594 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID | 2595 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE | 2596 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL | 2597 IB_SA_MCMEMBER_REC_FLOW_LABEL | 2598 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS; 2599 2600 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device, 2601 id_priv->id.port_num, &rec, 2602 comp_mask, GFP_KERNEL, 2603 cma_ib_mc_handler, mc); 2604 if (IS_ERR(mc->multicast.ib)) 2605 return PTR_ERR(mc->multicast.ib); 2606 2607 return 0; 2608 } 2609 2610 int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr, 2611 void *context) 2612 { 2613 struct rdma_id_private *id_priv; 2614 struct cma_multicast *mc; 2615 int ret; 2616 2617 id_priv = container_of(id, struct rdma_id_private, id); 2618 if (!cma_comp(id_priv, CMA_ADDR_BOUND) && 2619 !cma_comp(id_priv, CMA_ADDR_RESOLVED)) 2620 return -EINVAL; 2621 2622 mc = kmalloc(sizeof *mc, GFP_KERNEL); 2623 if (!mc) 2624 return -ENOMEM; 2625 2626 memcpy(&mc->addr, addr, ip_addr_size(addr)); 2627 mc->context = context; 2628 mc->id_priv = id_priv; 2629 2630 spin_lock(&id_priv->lock); 2631 list_add(&mc->list, &id_priv->mc_list); 2632 spin_unlock(&id_priv->lock); 2633 2634 switch (rdma_node_get_transport(id->device->node_type)) { 2635 case RDMA_TRANSPORT_IB: 2636 ret = cma_join_ib_multicast(id_priv, mc); 2637 break; 2638 default: 2639 ret = -ENOSYS; 2640 break; 2641 } 2642 2643 if (ret) { 2644 spin_lock_irq(&id_priv->lock); 2645 list_del(&mc->list); 2646 spin_unlock_irq(&id_priv->lock); 2647 kfree(mc); 2648 } 2649 return ret; 2650 } 2651 EXPORT_SYMBOL(rdma_join_multicast); 2652 2653 void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr) 2654 { 2655 struct rdma_id_private *id_priv; 2656 struct cma_multicast *mc; 2657 2658 id_priv = container_of(id, struct rdma_id_private, id); 2659 spin_lock_irq(&id_priv->lock); 2660 list_for_each_entry(mc, &id_priv->mc_list, list) { 2661 if (!memcmp(&mc->addr, addr, ip_addr_size(addr))) { 2662 list_del(&mc->list); 2663 spin_unlock_irq(&id_priv->lock); 2664 2665 if (id->qp) 2666 ib_detach_mcast(id->qp, 2667 &mc->multicast.ib->rec.mgid, 2668 mc->multicast.ib->rec.mlid); 2669 ib_sa_free_multicast(mc->multicast.ib); 2670 kfree(mc); 2671 return; 2672 } 2673 } 2674 spin_unlock_irq(&id_priv->lock); 2675 } 2676 EXPORT_SYMBOL(rdma_leave_multicast); 2677 2678 static void cma_add_one(struct ib_device *device) 2679 { 2680 struct cma_device *cma_dev; 2681 struct rdma_id_private *id_priv; 2682 2683 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL); 2684 if (!cma_dev) 2685 return; 2686 2687 cma_dev->device = device; 2688 2689 init_completion(&cma_dev->comp); 2690 atomic_set(&cma_dev->refcount, 1); 2691 INIT_LIST_HEAD(&cma_dev->id_list); 2692 ib_set_client_data(device, &cma_client, cma_dev); 2693 2694 mutex_lock(&lock); 2695 list_add_tail(&cma_dev->list, &dev_list); 2696 list_for_each_entry(id_priv, &listen_any_list, list) 2697 cma_listen_on_dev(id_priv, cma_dev); 2698 mutex_unlock(&lock); 2699 } 2700 2701 static int cma_remove_id_dev(struct rdma_id_private *id_priv) 2702 { 2703 struct rdma_cm_event event; 2704 enum cma_state state; 2705 2706 /* Record that we want to remove the device */ 2707 state = cma_exch(id_priv, CMA_DEVICE_REMOVAL); 2708 if (state == CMA_DESTROYING) 2709 return 0; 2710 2711 cma_cancel_operation(id_priv, state); 2712 wait_event(id_priv->wait_remove, !atomic_read(&id_priv->dev_remove)); 2713 2714 /* Check for destruction from another callback. */ 2715 if (!cma_comp(id_priv, CMA_DEVICE_REMOVAL)) 2716 return 0; 2717 2718 memset(&event, 0, sizeof event); 2719 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL; 2720 return id_priv->id.event_handler(&id_priv->id, &event); 2721 } 2722 2723 static void cma_process_remove(struct cma_device *cma_dev) 2724 { 2725 struct rdma_id_private *id_priv; 2726 int ret; 2727 2728 mutex_lock(&lock); 2729 while (!list_empty(&cma_dev->id_list)) { 2730 id_priv = list_entry(cma_dev->id_list.next, 2731 struct rdma_id_private, list); 2732 2733 if (cma_internal_listen(id_priv)) { 2734 cma_destroy_listen(id_priv); 2735 continue; 2736 } 2737 2738 list_del_init(&id_priv->list); 2739 atomic_inc(&id_priv->refcount); 2740 mutex_unlock(&lock); 2741 2742 ret = cma_remove_id_dev(id_priv); 2743 cma_deref_id(id_priv); 2744 if (ret) 2745 rdma_destroy_id(&id_priv->id); 2746 2747 mutex_lock(&lock); 2748 } 2749 mutex_unlock(&lock); 2750 2751 cma_deref_dev(cma_dev); 2752 wait_for_completion(&cma_dev->comp); 2753 } 2754 2755 static void cma_remove_one(struct ib_device *device) 2756 { 2757 struct cma_device *cma_dev; 2758 2759 cma_dev = ib_get_client_data(device, &cma_client); 2760 if (!cma_dev) 2761 return; 2762 2763 mutex_lock(&lock); 2764 list_del(&cma_dev->list); 2765 mutex_unlock(&lock); 2766 2767 cma_process_remove(cma_dev); 2768 kfree(cma_dev); 2769 } 2770 2771 static int cma_init(void) 2772 { 2773 int ret; 2774 2775 get_random_bytes(&next_port, sizeof next_port); 2776 next_port = ((unsigned int) next_port % 2777 (sysctl_local_port_range[1] - sysctl_local_port_range[0])) + 2778 sysctl_local_port_range[0]; 2779 cma_wq = create_singlethread_workqueue("rdma_cm"); 2780 if (!cma_wq) 2781 return -ENOMEM; 2782 2783 ib_sa_register_client(&sa_client); 2784 rdma_addr_register_client(&addr_client); 2785 2786 ret = ib_register_client(&cma_client); 2787 if (ret) 2788 goto err; 2789 return 0; 2790 2791 err: 2792 rdma_addr_unregister_client(&addr_client); 2793 ib_sa_unregister_client(&sa_client); 2794 destroy_workqueue(cma_wq); 2795 return ret; 2796 } 2797 2798 static void cma_cleanup(void) 2799 { 2800 ib_unregister_client(&cma_client); 2801 rdma_addr_unregister_client(&addr_client); 2802 ib_sa_unregister_client(&sa_client); 2803 destroy_workqueue(cma_wq); 2804 idr_destroy(&sdp_ps); 2805 idr_destroy(&tcp_ps); 2806 idr_destroy(&udp_ps); 2807 idr_destroy(&ipoib_ps); 2808 } 2809 2810 module_init(cma_init); 2811 module_exit(cma_cleanup); 2812