drivers/infiniband/core/cma.c

   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 int find_gid_port(struct ib_device *device, union ib_gid *gid, u8 port_num)
 332 {
 333         int i;
 334         int err;
 335         struct ib_port_attr props;
 336         union ib_gid tmp;
 337
 338         err = ib_query_port(device, port_num, &props);
 339         if (err)
 340                 return err;
 341
 342         for (i = 0; i < props.gid_tbl_len; ++i) {
 343                 err = ib_query_gid(device, port_num, i, &tmp);
 344                 if (err)
 345                         return err;
 346                 if (!memcmp(&tmp, gid, sizeof tmp))
 347                         return 0;
 348         }
 349
 350         return -EADDRNOTAVAIL;
 351 }
 352
 353 static void cma_translate_ib(struct sockaddr_ib *sib, struct rdma_dev_addr *dev_addr)
 354 {
 355         dev_addr->dev_type = ARPHRD_INFINIBAND;
 356         rdma_addr_set_sgid(dev_addr, (union ib_gid *) &sib->sib_addr);
 357         ib_addr_set_pkey(dev_addr, ntohs(sib->sib_pkey));
 358 }
 359
 360 static int cma_translate_addr(struct sockaddr *addr, struct rdma_dev_addr *dev_addr)
 361 {
 362         int ret;
 363
 364         if (addr->sa_family != AF_IB) {
 365                 ret = rdma_translate_ip(addr, dev_addr);
 366         } else {
 367                 cma_translate_ib((struct sockaddr_ib *) addr, dev_addr);
 368                 ret = 0;
 369         }
 370
 371         return ret;
 372 }
 373
 374 static int cma_acquire_dev(struct rdma_id_private *id_priv)
 375 {
 376         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
 377         struct cma_device *cma_dev;
 378         union ib_gid gid, iboe_gid;
 379         int ret = -ENODEV;
 380         u8 port;
 381         enum rdma_link_layer dev_ll = dev_addr->dev_type == ARPHRD_INFINIBAND ?
 382                 IB_LINK_LAYER_INFINIBAND : IB_LINK_LAYER_ETHERNET;
 383
 384         if (dev_ll != IB_LINK_LAYER_INFINIBAND &&
 385             id_priv->id.ps == RDMA_PS_IPOIB)
 386                 return -EINVAL;
 387
 388         mutex_lock(&lock);
 389         iboe_addr_get_sgid(dev_addr, &iboe_gid);
 390         memcpy(&gid, dev_addr->src_dev_addr +
 391                rdma_addr_gid_offset(dev_addr), sizeof gid);
 392         list_for_each_entry(cma_dev, &dev_list, list) {
 393                 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
 394                         if (rdma_port_get_link_layer(cma_dev->device, port) == dev_ll) {
 395                                 if (rdma_node_get_transport(cma_dev->device->node_type) == RDMA_TRANSPORT_IB &&
 396                                     rdma_port_get_link_layer(cma_dev->device, port) == IB_LINK_LAYER_ETHERNET)
 397                                         ret = find_gid_port(cma_dev->device, &iboe_gid, port);
 398                                 else
 399                                         ret = find_gid_port(cma_dev->device, &gid, port);
 400
 401                                 if (!ret) {
 402                                         id_priv->id.port_num = port;
 403                                         goto out;
 404                                 }
 405                         }
 406                 }
 407         }
 408
 409 out:
 410         if (!ret)
 411                 cma_attach_to_dev(id_priv, cma_dev);
 412
 413         mutex_unlock(&lock);
 414         return ret;
 415 }
 416
 417 /*
 418  * Select the source IB device and address to reach the destination IB address.
 419  */
 420 static int cma_resolve_ib_dev(struct rdma_id_private *id_priv)
 421 {
 422         struct cma_device *cma_dev, *cur_dev;
 423         struct sockaddr_ib *addr;
 424         union ib_gid gid, sgid, *dgid;
 425         u16 pkey, index;
 426         u8 p;
 427         int i;
 428
 429         cma_dev = NULL;
 430         addr = (struct sockaddr_ib *) cma_dst_addr(id_priv);
 431         dgid = (union ib_gid *) &addr->sib_addr;
 432         pkey = ntohs(addr->sib_pkey);
 433
 434         list_for_each_entry(cur_dev, &dev_list, list) {
 435                 if (rdma_node_get_transport(cur_dev->device->node_type) != RDMA_TRANSPORT_IB)
 436                         continue;
 437
 438                 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
 439                         if (ib_find_cached_pkey(cur_dev->device, p, pkey, &index))
 440                                 continue;
 441
 442                         for (i = 0; !ib_get_cached_gid(cur_dev->device, p, i, &gid); i++) {
 443                                 if (!memcmp(&gid, dgid, sizeof(gid))) {
 444                                         cma_dev = cur_dev;
 445                                         sgid = gid;
 446                                         id_priv->id.port_num = p;
 447                                         goto found;
 448                                 }
 449
 450                                 if (!cma_dev && (gid.global.subnet_prefix ==
 451                                                  dgid->global.subnet_prefix)) {
 452                                         cma_dev = cur_dev;
 453                                         sgid = gid;
 454                                         id_priv->id.port_num = p;
 455                                 }
 456                         }
 457                 }
 458         }
 459
 460         if (!cma_dev)
 461                 return -ENODEV;
 462
 463 found:
 464         cma_attach_to_dev(id_priv, cma_dev);
 465         addr = (struct sockaddr_ib *) cma_src_addr(id_priv);
 466         memcpy(&addr->sib_addr, &sgid, sizeof sgid);
 467         cma_translate_ib(addr, &id_priv->id.route.addr.dev_addr);
 468         return 0;
 469 }
 470
 471 static void cma_deref_id(struct rdma_id_private *id_priv)
 472 {
 473         if (atomic_dec_and_test(&id_priv->refcount))
 474                 complete(&id_priv->comp);
 475 }
 476
 477 static int cma_disable_callback(struct rdma_id_private *id_priv,
 478                                 enum rdma_cm_state state)
 479 {
 480         mutex_lock(&id_priv->handler_mutex);
 481         if (id_priv->state != state) {
 482                 mutex_unlock(&id_priv->handler_mutex);
 483                 return -EINVAL;
 484         }
 485         return 0;
 486 }
 487
 488 struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
 489                                   void *context, enum rdma_port_space ps,
 490                                   enum ib_qp_type qp_type)
 491 {
 492         struct rdma_id_private *id_priv;
 493
 494         id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
 495         if (!id_priv)
 496                 return ERR_PTR(-ENOMEM);
 497
 498         id_priv->owner = task_pid_nr(current);
 499         id_priv->state = RDMA_CM_IDLE;
 500         id_priv->id.context = context;
 501         id_priv->id.event_handler = event_handler;
 502         id_priv->id.ps = ps;
 503         id_priv->id.qp_type = qp_type;
 504         spin_lock_init(&id_priv->lock);
 505         mutex_init(&id_priv->qp_mutex);
 506         init_completion(&id_priv->comp);
 507         atomic_set(&id_priv->refcount, 1);
 508         mutex_init(&id_priv->handler_mutex);
 509         INIT_LIST_HEAD(&id_priv->listen_list);
 510         INIT_LIST_HEAD(&id_priv->mc_list);
 511         get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
 512
 513         return &id_priv->id;
 514 }
 515 EXPORT_SYMBOL(rdma_create_id);
 516
 517 static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
 518 {
 519         struct ib_qp_attr qp_attr;
 520         int qp_attr_mask, ret;
 521
 522         qp_attr.qp_state = IB_QPS_INIT;
 523         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 524         if (ret)
 525                 return ret;
 526
 527         ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
 528         if (ret)
 529                 return ret;
 530
 531         qp_attr.qp_state = IB_QPS_RTR;
 532         ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
 533         if (ret)
 534                 return ret;
 535
 536         qp_attr.qp_state = IB_QPS_RTS;
 537         qp_attr.sq_psn = 0;
 538         ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
 539
 540         return ret;
 541 }
 542
 543 static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
 544 {
 545         struct ib_qp_attr qp_attr;
 546         int qp_attr_mask, ret;
 547
 548         qp_attr.qp_state = IB_QPS_INIT;
 549         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 550         if (ret)
 551                 return ret;
 552
 553         return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
 554 }
 555
 556 int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
 557                    struct ib_qp_init_attr *qp_init_attr)
 558 {
 559         struct rdma_id_private *id_priv;
 560         struct ib_qp *qp;
 561         int ret;
 562
 563         id_priv = container_of(id, struct rdma_id_private, id);
 564         if (id->device != pd->device)
 565                 return -EINVAL;
 566
 567         qp = ib_create_qp(pd, qp_init_attr);
 568         if (IS_ERR(qp))
 569                 return PTR_ERR(qp);
 570
 571         if (id->qp_type == IB_QPT_UD)
 572                 ret = cma_init_ud_qp(id_priv, qp);
 573         else
 574                 ret = cma_init_conn_qp(id_priv, qp);
 575         if (ret)
 576                 goto err;
 577
 578         id->qp = qp;
 579         id_priv->qp_num = qp->qp_num;
 580         id_priv->srq = (qp->srq != NULL);
 581         return 0;
 582 err:
 583         ib_destroy_qp(qp);
 584         return ret;
 585 }
 586 EXPORT_SYMBOL(rdma_create_qp);
 587
 588 void rdma_destroy_qp(struct rdma_cm_id *id)
 589 {
 590         struct rdma_id_private *id_priv;
 591
 592         id_priv = container_of(id, struct rdma_id_private, id);
 593         mutex_lock(&id_priv->qp_mutex);
 594         ib_destroy_qp(id_priv->id.qp);
 595         id_priv->id.qp = NULL;
 596         mutex_unlock(&id_priv->qp_mutex);
 597 }
 598 EXPORT_SYMBOL(rdma_destroy_qp);
 599
 600 static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
 601                              struct rdma_conn_param *conn_param)
 602 {
 603         struct ib_qp_attr qp_attr;
 604         int qp_attr_mask, ret;
 605
 606         mutex_lock(&id_priv->qp_mutex);
 607         if (!id_priv->id.qp) {
 608                 ret = 0;
 609                 goto out;
 610         }
 611
 612         /* Need to update QP attributes from default values. */
 613         qp_attr.qp_state = IB_QPS_INIT;
 614         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 615         if (ret)
 616                 goto out;
 617
 618         ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
 619         if (ret)
 620                 goto out;
 621
 622         qp_attr.qp_state = IB_QPS_RTR;
 623         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 624         if (ret)
 625                 goto out;
 626
 627         if (conn_param)
 628                 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
 629         ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
 630 out:
 631         mutex_unlock(&id_priv->qp_mutex);
 632         return ret;
 633 }
 634
 635 static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
 636                              struct rdma_conn_param *conn_param)
 637 {
 638         struct ib_qp_attr qp_attr;
 639         int qp_attr_mask, ret;
 640
 641         mutex_lock(&id_priv->qp_mutex);
 642         if (!id_priv->id.qp) {
 643                 ret = 0;
 644                 goto out;
 645         }
 646
 647         qp_attr.qp_state = IB_QPS_RTS;
 648         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 649         if (ret)
 650                 goto out;
 651
 652         if (conn_param)
 653                 qp_attr.max_rd_atomic = conn_param->initiator_depth;
 654         ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
 655 out:
 656         mutex_unlock(&id_priv->qp_mutex);
 657         return ret;
 658 }
 659
 660 static int cma_modify_qp_err(struct rdma_id_private *id_priv)
 661 {
 662         struct ib_qp_attr qp_attr;
 663         int ret;
 664
 665         mutex_lock(&id_priv->qp_mutex);
 666         if (!id_priv->id.qp) {
 667                 ret = 0;
 668                 goto out;
 669         }
 670
 671         qp_attr.qp_state = IB_QPS_ERR;
 672         ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
 673 out:
 674         mutex_unlock(&id_priv->qp_mutex);
 675         return ret;
 676 }
 677
 678 static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
 679                                struct ib_qp_attr *qp_attr, int *qp_attr_mask)
 680 {
 681         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
 682         int ret;
 683         u16 pkey;
 684
 685         if (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num) ==
 686             IB_LINK_LAYER_INFINIBAND)
 687                 pkey = ib_addr_get_pkey(dev_addr);
 688         else
 689                 pkey = 0xffff;
 690
 691         ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
 692                                   pkey, &qp_attr->pkey_index);
 693         if (ret)
 694                 return ret;
 695
 696         qp_attr->port_num = id_priv->id.port_num;
 697         *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
 698
 699         if (id_priv->id.qp_type == IB_QPT_UD) {
 700                 ret = cma_set_qkey(id_priv, 0);
 701                 if (ret)
 702                         return ret;
 703
 704                 qp_attr->qkey = id_priv->qkey;
 705                 *qp_attr_mask |= IB_QP_QKEY;
 706         } else {
 707                 qp_attr->qp_access_flags = 0;
 708                 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
 709         }
 710         return 0;
 711 }
 712
 713 int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
 714                        int *qp_attr_mask)
 715 {
 716         struct rdma_id_private *id_priv;
 717         int ret = 0;
 718
 719         id_priv = container_of(id, struct rdma_id_private, id);
 720         switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
 721         case RDMA_TRANSPORT_IB:
 722                 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD))
 723                         ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
 724                 else
 725                         ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
 726                                                  qp_attr_mask);
 727                 if (qp_attr->qp_state == IB_QPS_RTR)
 728                         qp_attr->rq_psn = id_priv->seq_num;
 729                 break;
 730         case RDMA_TRANSPORT_IWARP:
 731                 if (!id_priv->cm_id.iw) {
 732                         qp_attr->qp_access_flags = 0;
 733                         *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
 734                 } else
 735                         ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
 736                                                  qp_attr_mask);
 737                 break;
 738         default:
 739                 ret = -ENOSYS;
 740                 break;
 741         }
 742
 743         return ret;
 744 }
 745 EXPORT_SYMBOL(rdma_init_qp_attr);
 746
 747 static inline int cma_zero_addr(struct sockaddr *addr)
 748 {
 749         switch (addr->sa_family) {
 750         case AF_INET:
 751                 return ipv4_is_zeronet(((struct sockaddr_in *)addr)->sin_addr.s_addr);
 752         case AF_INET6:
 753                 return ipv6_addr_any(&((struct sockaddr_in6 *) addr)->sin6_addr);
 754         case AF_IB:
 755                 return ib_addr_any(&((struct sockaddr_ib *) addr)->sib_addr);
 756         default:
 757                 return 0;
 758         }
 759 }
 760
 761 static inline int cma_loopback_addr(struct sockaddr *addr)
 762 {
 763         switch (addr->sa_family) {
 764         case AF_INET:
 765                 return ipv4_is_loopback(((struct sockaddr_in *) addr)->sin_addr.s_addr);
 766         case AF_INET6:
 767                 return ipv6_addr_loopback(&((struct sockaddr_in6 *) addr)->sin6_addr);
 768         case AF_IB:
 769                 return ib_addr_loopback(&((struct sockaddr_ib *) addr)->sib_addr);
 770         default:
 771                 return 0;
 772         }
 773 }
 774
 775 static inline int cma_any_addr(struct sockaddr *addr)
 776 {
 777         return cma_zero_addr(addr) || cma_loopback_addr(addr);
 778 }
 779
 780 static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst)
 781 {
 782         if (src->sa_family != dst->sa_family)
 783                 return -1;
 784
 785         switch (src->sa_family) {
 786         case AF_INET:
 787                 return ((struct sockaddr_in *) src)->sin_addr.s_addr !=
 788                        ((struct sockaddr_in *) dst)->sin_addr.s_addr;
 789         case AF_INET6:
 790                 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr,
 791                                      &((struct sockaddr_in6 *) dst)->sin6_addr);
 792         default:
 793                 return ib_addr_cmp(&((struct sockaddr_ib *) src)->sib_addr,
 794                                    &((struct sockaddr_ib *) dst)->sib_addr);
 795         }
 796 }
 797
 798 static __be16 cma_port(struct sockaddr *addr)
 799 {
 800         struct sockaddr_ib *sib;
 801
 802         switch (addr->sa_family) {
 803         case AF_INET:
 804                 return ((struct sockaddr_in *) addr)->sin_port;
 805         case AF_INET6:
 806                 return ((struct sockaddr_in6 *) addr)->sin6_port;
 807         case AF_IB:
 808                 sib = (struct sockaddr_ib *) addr;
 809                 return htons((u16) (be64_to_cpu(sib->sib_sid) &
 810                                     be64_to_cpu(sib->sib_sid_mask)));
 811         default:
 812                 return 0;
 813         }
 814 }
 815
 816 static inline int cma_any_port(struct sockaddr *addr)
 817 {
 818         return !cma_port(addr);
 819 }
 820
 821 static void cma_save_ib_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id,
 822                              struct ib_sa_path_rec *path)
 823 {
 824         struct sockaddr_ib *listen_ib, *ib;
 825
 826         listen_ib = (struct sockaddr_ib *) &listen_id->route.addr.src_addr;
 827         ib = (struct sockaddr_ib *) &id->route.addr.src_addr;
 828         ib->sib_family = listen_ib->sib_family;
 829         ib->sib_pkey = path->pkey;
 830         ib->sib_flowinfo = path->flow_label;
 831         memcpy(&ib->sib_addr, &path->sgid, 16);
 832         ib->sib_sid = listen_ib->sib_sid;
 833         ib->sib_sid_mask = cpu_to_be64(0xffffffffffffffffULL);
 834         ib->sib_scope_id = listen_ib->sib_scope_id;
 835
 836         ib = (struct sockaddr_ib *) &id->route.addr.dst_addr;
 837         ib->sib_family = listen_ib->sib_family;
 838         ib->sib_pkey = path->pkey;
 839         ib->sib_flowinfo = path->flow_label;
 840         memcpy(&ib->sib_addr, &path->dgid, 16);
 841 }
 842
 843 static void cma_save_ip4_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id,
 844                               struct cma_hdr *hdr)
 845 {
 846         struct sockaddr_in *listen4, *ip4;
 847
 848         listen4 = (struct sockaddr_in *) &listen_id->route.addr.src_addr;
 849         ip4 = (struct sockaddr_in *) &id->route.addr.src_addr;
 850         ip4->sin_family = listen4->sin_family;
 851         ip4->sin_addr.s_addr = hdr->dst_addr.ip4.addr;
 852         ip4->sin_port = listen4->sin_port;
 853
 854         ip4 = (struct sockaddr_in *) &id->route.addr.dst_addr;
 855         ip4->sin_family = listen4->sin_family;
 856         ip4->sin_addr.s_addr = hdr->src_addr.ip4.addr;
 857         ip4->sin_port = hdr->port;
 858 }
 859
 860 static void cma_save_ip6_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id,
 861                               struct cma_hdr *hdr)
 862 {
 863         struct sockaddr_in6 *listen6, *ip6;
 864
 865         listen6 = (struct sockaddr_in6 *) &listen_id->route.addr.src_addr;
 866         ip6 = (struct sockaddr_in6 *) &id->route.addr.src_addr;
 867         ip6->sin6_family = listen6->sin6_family;
 868         ip6->sin6_addr = hdr->dst_addr.ip6;
 869         ip6->sin6_port = listen6->sin6_port;
 870
 871         ip6 = (struct sockaddr_in6 *) &id->route.addr.dst_addr;
 872         ip6->sin6_family = listen6->sin6_family;
 873         ip6->sin6_addr = hdr->src_addr.ip6;
 874         ip6->sin6_port = hdr->port;
 875 }
 876
 877 static int cma_save_net_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id,
 878                              struct ib_cm_event *ib_event)
 879 {
 880         struct cma_hdr *hdr;
 881
 882         if ((listen_id->route.addr.src_addr.ss_family == AF_IB) &&
 883             (ib_event->event == IB_CM_REQ_RECEIVED)) {
 884                 cma_save_ib_info(id, listen_id, ib_event->param.req_rcvd.primary_path);
 885                 return 0;
 886         }
 887
 888         hdr = ib_event->private_data;
 889         if (hdr->cma_version != CMA_VERSION)
 890                 return -EINVAL;
 891
 892         switch (cma_get_ip_ver(hdr)) {
 893         case 4:
 894                 cma_save_ip4_info(id, listen_id, hdr);
 895                 break;
 896         case 6:
 897                 cma_save_ip6_info(id, listen_id, hdr);
 898                 break;
 899         default:
 900                 return -EINVAL;
 901         }
 902         return 0;
 903 }
 904
 905 static inline int cma_user_data_offset(struct rdma_id_private *id_priv)
 906 {
 907         return cma_family(id_priv) == AF_IB ? 0 : sizeof(struct cma_hdr);
 908 }
 909
 910 static void cma_cancel_route(struct rdma_id_private *id_priv)
 911 {
 912         switch (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num)) {
 913         case IB_LINK_LAYER_INFINIBAND:
 914                 if (id_priv->query)
 915                         ib_sa_cancel_query(id_priv->query_id, id_priv->query);
 916                 break;
 917         default:
 918                 break;
 919         }
 920 }
 921
 922 static void cma_cancel_listens(struct rdma_id_private *id_priv)
 923 {
 924         struct rdma_id_private *dev_id_priv;
 925
 926         /*
 927          * Remove from listen_any_list to prevent added devices from spawning
 928          * additional listen requests.
 929          */
 930         mutex_lock(&lock);
 931         list_del(&id_priv->list);
 932
 933         while (!list_empty(&id_priv->listen_list)) {
 934                 dev_id_priv = list_entry(id_priv->listen_list.next,
 935                                          struct rdma_id_private, listen_list);
 936                 /* sync with device removal to avoid duplicate destruction */
 937                 list_del_init(&dev_id_priv->list);
 938                 list_del(&dev_id_priv->listen_list);
 939                 mutex_unlock(&lock);
 940
 941                 rdma_destroy_id(&dev_id_priv->id);
 942                 mutex_lock(&lock);
 943         }
 944         mutex_unlock(&lock);
 945 }
 946
 947 static void cma_cancel_operation(struct rdma_id_private *id_priv,
 948                                  enum rdma_cm_state state)
 949 {
 950         switch (state) {
 951         case RDMA_CM_ADDR_QUERY:
 952                 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
 953                 break;
 954         case RDMA_CM_ROUTE_QUERY:
 955                 cma_cancel_route(id_priv);
 956                 break;
 957         case RDMA_CM_LISTEN:
 958                 if (cma_any_addr(cma_src_addr(id_priv)) && !id_priv->cma_dev)
 959                         cma_cancel_listens(id_priv);
 960                 break;
 961         default:
 962                 break;
 963         }
 964 }
 965
 966 static void cma_release_port(struct rdma_id_private *id_priv)
 967 {
 968         struct rdma_bind_list *bind_list = id_priv->bind_list;
 969
 970         if (!bind_list)
 971                 return;
 972
 973         mutex_lock(&lock);
 974         hlist_del(&id_priv->node);
 975         if (hlist_empty(&bind_list->owners)) {
 976                 idr_remove(bind_list->ps, bind_list->port);
 977                 kfree(bind_list);
 978         }
 979         mutex_unlock(&lock);
 980 }
 981
 982 static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
 983 {
 984         struct cma_multicast *mc;
 985
 986         while (!list_empty(&id_priv->mc_list)) {
 987                 mc = container_of(id_priv->mc_list.next,
 988                                   struct cma_multicast, list);
 989                 list_del(&mc->list);
 990                 switch (rdma_port_get_link_layer(id_priv->cma_dev->device, id_priv->id.port_num)) {
 991                 case IB_LINK_LAYER_INFINIBAND:
 992                         ib_sa_free_multicast(mc->multicast.ib);
 993                         kfree(mc);
 994                         break;
 995                 case IB_LINK_LAYER_ETHERNET:
 996                         kref_put(&mc->mcref, release_mc);
 997                         break;
 998                 default:
 999                         break;
1000                 }
1001         }
1002 }
1003
1004 void rdma_destroy_id(struct rdma_cm_id *id)
1005 {
1006         struct rdma_id_private *id_priv;
1007         enum rdma_cm_state state;
1008
1009         id_priv = container_of(id, struct rdma_id_private, id);
1010         state = cma_exch(id_priv, RDMA_CM_DESTROYING);
1011         cma_cancel_operation(id_priv, state);
1012
1013         /*
1014          * Wait for any active callback to finish.  New callbacks will find
1015          * the id_priv state set to destroying and abort.
1016          */
1017         mutex_lock(&id_priv->handler_mutex);
1018         mutex_unlock(&id_priv->handler_mutex);
1019
1020         if (id_priv->cma_dev) {
1021                 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
1022                 case RDMA_TRANSPORT_IB:
1023                         if (id_priv->cm_id.ib)
1024                                 ib_destroy_cm_id(id_priv->cm_id.ib);
1025                         break;
1026                 case RDMA_TRANSPORT_IWARP:
1027                         if (id_priv->cm_id.iw)
1028                                 iw_destroy_cm_id(id_priv->cm_id.iw);
1029                         break;
1030                 default:
1031                         break;
1032                 }
1033                 cma_leave_mc_groups(id_priv);
1034                 cma_release_dev(id_priv);
1035         }
1036
1037         cma_release_port(id_priv);
1038         cma_deref_id(id_priv);
1039         wait_for_completion(&id_priv->comp);
1040
1041         if (id_priv->internal_id)
1042                 cma_deref_id(id_priv->id.context);
1043
1044         kfree(id_priv->id.route.path_rec);
1045         kfree(id_priv);
1046 }
1047 EXPORT_SYMBOL(rdma_destroy_id);
1048
1049 static int cma_rep_recv(struct rdma_id_private *id_priv)
1050 {
1051         int ret;
1052
1053         ret = cma_modify_qp_rtr(id_priv, NULL);
1054         if (ret)
1055                 goto reject;
1056
1057         ret = cma_modify_qp_rts(id_priv, NULL);
1058         if (ret)
1059                 goto reject;
1060
1061         ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
1062         if (ret)
1063                 goto reject;
1064
1065         return 0;
1066 reject:
1067         cma_modify_qp_err(id_priv);
1068         ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
1069                        NULL, 0, NULL, 0);
1070         return ret;
1071 }
1072
1073 static void cma_set_rep_event_data(struct rdma_cm_event *event,
1074                                    struct ib_cm_rep_event_param *rep_data,
1075                                    void *private_data)
1076 {
1077         event->param.conn.private_data = private_data;
1078         event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
1079         event->param.conn.responder_resources = rep_data->responder_resources;
1080         event->param.conn.initiator_depth = rep_data->initiator_depth;
1081         event->param.conn.flow_control = rep_data->flow_control;
1082         event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
1083         event->param.conn.srq = rep_data->srq;
1084         event->param.conn.qp_num = rep_data->remote_qpn;
1085 }
1086
1087 static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1088 {
1089         struct rdma_id_private *id_priv = cm_id->context;
1090         struct rdma_cm_event event;
1091         int ret = 0;
1092
1093         if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
1094                 cma_disable_callback(id_priv, RDMA_CM_CONNECT)) ||
1095             (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
1096                 cma_disable_callback(id_priv, RDMA_CM_DISCONNECT)))
1097                 return 0;
1098
1099         memset(&event, 0, sizeof event);
1100         switch (ib_event->event) {
1101         case IB_CM_REQ_ERROR:
1102         case IB_CM_REP_ERROR:
1103                 event.event = RDMA_CM_EVENT_UNREACHABLE;
1104                 event.status = -ETIMEDOUT;
1105                 break;
1106         case IB_CM_REP_RECEIVED:
1107                 if (id_priv->id.qp) {
1108                         event.status = cma_rep_recv(id_priv);
1109                         event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
1110                                                      RDMA_CM_EVENT_ESTABLISHED;
1111                 } else {
1112                         event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
1113                 }
1114                 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
1115                                        ib_event->private_data);
1116                 break;
1117         case IB_CM_RTU_RECEIVED:
1118         case IB_CM_USER_ESTABLISHED:
1119                 event.event = RDMA_CM_EVENT_ESTABLISHED;
1120                 break;
1121         case IB_CM_DREQ_ERROR:
1122                 event.status = -ETIMEDOUT; /* fall through */
1123         case IB_CM_DREQ_RECEIVED:
1124         case IB_CM_DREP_RECEIVED:
1125                 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT,
1126                                    RDMA_CM_DISCONNECT))
1127                         goto out;
1128                 event.event = RDMA_CM_EVENT_DISCONNECTED;
1129                 break;
1130         case IB_CM_TIMEWAIT_EXIT:
1131                 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
1132                 break;
1133         case IB_CM_MRA_RECEIVED:
1134                 /* ignore event */
1135                 goto out;
1136         case IB_CM_REJ_RECEIVED:
1137                 cma_modify_qp_err(id_priv);
1138                 event.status = ib_event->param.rej_rcvd.reason;
1139                 event.event = RDMA_CM_EVENT_REJECTED;
1140                 event.param.conn.private_data = ib_event->private_data;
1141                 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
1142                 break;
1143         default:
1144                 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
1145                        ib_event->event);
1146                 goto out;
1147         }
1148
1149         ret = id_priv->id.event_handler(&id_priv->id, &event);
1150         if (ret) {
1151                 /* Destroy the CM ID by returning a non-zero value. */
1152                 id_priv->cm_id.ib = NULL;
1153                 cma_exch(id_priv, RDMA_CM_DESTROYING);
1154                 mutex_unlock(&id_priv->handler_mutex);
1155                 rdma_destroy_id(&id_priv->id);
1156                 return ret;
1157         }
1158 out:
1159         mutex_unlock(&id_priv->handler_mutex);
1160         return ret;
1161 }
1162
1163 static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
1164                                                struct ib_cm_event *ib_event)
1165 {
1166         struct rdma_id_private *id_priv;
1167         struct rdma_cm_id *id;
1168         struct rdma_route *rt;
1169         int ret;
1170
1171         id = rdma_create_id(listen_id->event_handler, listen_id->context,
1172                             listen_id->ps, ib_event->param.req_rcvd.qp_type);
1173         if (IS_ERR(id))
1174                 return NULL;
1175
1176         id_priv = container_of(id, struct rdma_id_private, id);
1177         if (cma_save_net_info(id, listen_id, ib_event))
1178                 goto err;
1179
1180         rt = &id->route;
1181         rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
1182         rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
1183                                GFP_KERNEL);
1184         if (!rt->path_rec)
1185                 goto err;
1186
1187         rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
1188         if (rt->num_paths == 2)
1189                 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1190
1191         if (cma_any_addr(cma_src_addr(id_priv))) {
1192                 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
1193                 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
1194                 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
1195         } else {
1196                 ret = cma_translate_addr(cma_src_addr(id_priv), &rt->addr.dev_addr);
1197                 if (ret)
1198                         goto err;
1199         }
1200         rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
1201
1202         id_priv->state = RDMA_CM_CONNECT;
1203         return id_priv;
1204
1205 err:
1206         rdma_destroy_id(id);
1207         return NULL;
1208 }
1209
1210 static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
1211                                               struct ib_cm_event *ib_event)
1212 {
1213         struct rdma_id_private *id_priv;
1214         struct rdma_cm_id *id;
1215         int ret;
1216
1217         id = rdma_create_id(listen_id->event_handler, listen_id->context,
1218                             listen_id->ps, IB_QPT_UD);
1219         if (IS_ERR(id))
1220                 return NULL;
1221
1222         id_priv = container_of(id, struct rdma_id_private, id);
1223         if (cma_save_net_info(id, listen_id, ib_event))
1224                 goto err;
1225
1226         if (!cma_any_addr((struct sockaddr *) &id->route.addr.src_addr)) {
1227                 ret = cma_translate_addr(cma_src_addr(id_priv), &id->route.addr.dev_addr);
1228                 if (ret)
1229                         goto err;
1230         }
1231
1232         id_priv->state = RDMA_CM_CONNECT;
1233         return id_priv;
1234 err:
1235         rdma_destroy_id(id);
1236         return NULL;
1237 }
1238
1239 static void cma_set_req_event_data(struct rdma_cm_event *event,
1240                                    struct ib_cm_req_event_param *req_data,
1241                                    void *private_data, int offset)
1242 {
1243         event->param.conn.private_data = private_data + offset;
1244         event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1245         event->param.conn.responder_resources = req_data->responder_resources;
1246         event->param.conn.initiator_depth = req_data->initiator_depth;
1247         event->param.conn.flow_control = req_data->flow_control;
1248         event->param.conn.retry_count = req_data->retry_count;
1249         event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1250         event->param.conn.srq = req_data->srq;
1251         event->param.conn.qp_num = req_data->remote_qpn;
1252 }
1253
1254 static int cma_check_req_qp_type(struct rdma_cm_id *id, struct ib_cm_event *ib_event)
1255 {
1256         return (((ib_event->event == IB_CM_REQ_RECEIVED) &&
1257                  (ib_event->param.req_rcvd.qp_type == id->qp_type)) ||
1258                 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) &&
1259                  (id->qp_type == IB_QPT_UD)) ||
1260                 (!id->qp_type));
1261 }
1262
1263 static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1264 {
1265         struct rdma_id_private *listen_id, *conn_id;
1266         struct rdma_cm_event event;
1267         int offset, ret;
1268
1269         listen_id = cm_id->context;
1270         if (!cma_check_req_qp_type(&listen_id->id, ib_event))
1271                 return -EINVAL;
1272
1273         if (cma_disable_callback(listen_id, RDMA_CM_LISTEN))
1274                 return -ECONNABORTED;
1275
1276         memset(&event, 0, sizeof event);
1277         offset = cma_user_data_offset(listen_id);
1278         event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1279         if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) {
1280                 conn_id = cma_new_udp_id(&listen_id->id, ib_event);
1281                 event.param.ud.private_data = ib_event->private_data + offset;
1282                 event.param.ud.private_data_len =
1283                                 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1284         } else {
1285                 conn_id = cma_new_conn_id(&listen_id->id, ib_event);
1286                 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1287                                        ib_event->private_data, offset);
1288         }
1289         if (!conn_id) {
1290                 ret = -ENOMEM;
1291                 goto err1;
1292         }
1293
1294         mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
1295         ret = cma_acquire_dev(conn_id);
1296         if (ret)
1297                 goto err2;
1298
1299         conn_id->cm_id.ib = cm_id;
1300         cm_id->context = conn_id;
1301         cm_id->cm_handler = cma_ib_handler;
1302
1303         /*
1304          * Protect against the user destroying conn_id from another thread
1305          * until we're done accessing it.
1306          */
1307         atomic_inc(&conn_id->refcount);
1308         ret = conn_id->id.event_handler(&conn_id->id, &event);
1309         if (ret)
1310                 goto err3;
1311
1312         /*
1313          * Acquire mutex to prevent user executing rdma_destroy_id()
1314          * while we're accessing the cm_id.
1315          */
1316         mutex_lock(&lock);
1317         if (cma_comp(conn_id, RDMA_CM_CONNECT) && (conn_id->id.qp_type != IB_QPT_UD))
1318                 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1319         mutex_unlock(&lock);
1320         mutex_unlock(&conn_id->handler_mutex);
1321         mutex_unlock(&listen_id->handler_mutex);
1322         cma_deref_id(conn_id);
1323         return 0;
1324
1325 err3:
1326         cma_deref_id(conn_id);
1327         /* Destroy the CM ID by returning a non-zero value. */
1328         conn_id->cm_id.ib = NULL;
1329 err2:
1330         cma_exch(conn_id, RDMA_CM_DESTROYING);
1331         mutex_unlock(&conn_id->handler_mutex);
1332 err1:
1333         mutex_unlock(&listen_id->handler_mutex);
1334         if (conn_id)
1335                 rdma_destroy_id(&conn_id->id);
1336         return ret;
1337 }
1338
1339 __be64 rdma_get_service_id(struct rdma_cm_id *id, struct sockaddr *addr)
1340 {
1341         if (addr->sa_family == AF_IB)
1342                 return ((struct sockaddr_ib *) addr)->sib_sid;
1343
1344         return cpu_to_be64(((u64)id->ps << 16) + be16_to_cpu(cma_port(addr)));
1345 }
1346 EXPORT_SYMBOL(rdma_get_service_id);
1347
1348 static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr,
1349                                  struct ib_cm_compare_data *compare)
1350 {
1351         struct cma_hdr *cma_data, *cma_mask;
1352         __be32 ip4_addr;
1353         struct in6_addr ip6_addr;
1354
1355         memset(compare, 0, sizeof *compare);
1356         cma_data = (void *) compare->data;
1357         cma_mask = (void *) compare->mask;
1358
1359         switch (addr->sa_family) {
1360         case AF_INET:
1361                 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
1362                 cma_set_ip_ver(cma_data, 4);
1363                 cma_set_ip_ver(cma_mask, 0xF);
1364                 if (!cma_any_addr(addr)) {
1365                         cma_data->dst_addr.ip4.addr = ip4_addr;
1366                         cma_mask->dst_addr.ip4.addr = htonl(~0);
1367                 }
1368                 break;
1369         case AF_INET6:
1370                 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr;
1371                 cma_set_ip_ver(cma_data, 6);
1372                 cma_set_ip_ver(cma_mask, 0xF);
1373                 if (!cma_any_addr(addr)) {
1374                         cma_data->dst_addr.ip6 = ip6_addr;
1375                         memset(&cma_mask->dst_addr.ip6, 0xFF,
1376                                sizeof cma_mask->dst_addr.ip6);
1377                 }
1378                 break;
1379         default:
1380                 break;
1381         }
1382 }
1383
1384 static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
1385 {
1386         struct rdma_id_private *id_priv = iw_id->context;
1387         struct rdma_cm_event event;
1388         int ret = 0;
1389         struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
1390         struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
1391
1392         if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
1393                 return 0;
1394
1395         memset(&event, 0, sizeof event);
1396         switch (iw_event->event) {
1397         case IW_CM_EVENT_CLOSE:
1398                 event.event = RDMA_CM_EVENT_DISCONNECTED;
1399                 break;
1400         case IW_CM_EVENT_CONNECT_REPLY:
1401                 memcpy(cma_src_addr(id_priv), laddr,
1402                        rdma_addr_size(laddr));
1403                 memcpy(cma_dst_addr(id_priv), raddr,
1404                        rdma_addr_size(raddr));
1405                 switch (iw_event->status) {
1406                 case 0:
1407                         event.event = RDMA_CM_EVENT_ESTABLISHED;
1408                         event.param.conn.initiator_depth = iw_event->ird;
1409                         event.param.conn.responder_resources = iw_event->ord;
1410                         break;
1411                 case -ECONNRESET:
1412                 case -ECONNREFUSED:
1413                         event.event = RDMA_CM_EVENT_REJECTED;
1414                         break;
1415                 case -ETIMEDOUT:
1416                         event.event = RDMA_CM_EVENT_UNREACHABLE;
1417                         break;
1418                 default:
1419                         event.event = RDMA_CM_EVENT_CONNECT_ERROR;
1420                         break;
1421                 }
1422                 break;
1423         case IW_CM_EVENT_ESTABLISHED:
1424                 event.event = RDMA_CM_EVENT_ESTABLISHED;
1425                 event.param.conn.initiator_depth = iw_event->ird;
1426                 event.param.conn.responder_resources = iw_event->ord;
1427                 break;
1428         default:
1429                 BUG_ON(1);
1430         }
1431
1432         event.status = iw_event->status;
1433         event.param.conn.private_data = iw_event->private_data;
1434         event.param.conn.private_data_len = iw_event->private_data_len;
1435         ret = id_priv->id.event_handler(&id_priv->id, &event);
1436         if (ret) {
1437                 /* Destroy the CM ID by returning a non-zero value. */
1438                 id_priv->cm_id.iw = NULL;
1439                 cma_exch(id_priv, RDMA_CM_DESTROYING);
1440                 mutex_unlock(&id_priv->handler_mutex);
1441                 rdma_destroy_id(&id_priv->id);
1442                 return ret;
1443         }
1444
1445         mutex_unlock(&id_priv->handler_mutex);
1446         return ret;
1447 }
1448
1449 static int iw_conn_req_handler(struct iw_cm_id *cm_id,
1450                                struct iw_cm_event *iw_event)
1451 {
1452         struct rdma_cm_id *new_cm_id;
1453         struct rdma_id_private *listen_id, *conn_id;
1454         struct net_device *dev = NULL;
1455         struct rdma_cm_event event;
1456         int ret;
1457         struct ib_device_attr attr;
1458         struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
1459         struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
1460
1461         listen_id = cm_id->context;
1462         if (cma_disable_callback(listen_id, RDMA_CM_LISTEN))
1463                 return -ECONNABORTED;
1464
1465         /* Create a new RDMA id for the new IW CM ID */
1466         new_cm_id = rdma_create_id(listen_id->id.event_handler,
1467                                    listen_id->id.context,
1468                                    RDMA_PS_TCP, IB_QPT_RC);
1469         if (IS_ERR(new_cm_id)) {
1470                 ret = -ENOMEM;
1471                 goto out;
1472         }
1473         conn_id = container_of(new_cm_id, struct rdma_id_private, id);
1474         mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
1475         conn_id->state = RDMA_CM_CONNECT;
1476
1477         ret = rdma_translate_ip(laddr, &conn_id->id.route.addr.dev_addr);
1478         if (ret) {
1479                 mutex_unlock(&conn_id->handler_mutex);
1480                 rdma_destroy_id(new_cm_id);
1481                 goto out;
1482         }
1483
1484         ret = cma_acquire_dev(conn_id);
1485         if (ret) {
1486                 mutex_unlock(&conn_id->handler_mutex);
1487                 rdma_destroy_id(new_cm_id);
1488                 goto out;
1489         }
1490
1491         conn_id->cm_id.iw = cm_id;
1492         cm_id->context = conn_id;
1493         cm_id->cm_handler = cma_iw_handler;
1494
1495         memcpy(cma_src_addr(conn_id), laddr, rdma_addr_size(laddr));
1496         memcpy(cma_dst_addr(conn_id), raddr, rdma_addr_size(raddr));
1497
1498         ret = ib_query_device(conn_id->id.device, &attr);
1499         if (ret) {
1500                 mutex_unlock(&conn_id->handler_mutex);
1501                 rdma_destroy_id(new_cm_id);
1502                 goto out;
1503         }
1504
1505         memset(&event, 0, sizeof event);
1506         event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1507         event.param.conn.private_data = iw_event->private_data;
1508         event.param.conn.private_data_len = iw_event->private_data_len;
1509         event.param.conn.initiator_depth = iw_event->ird;
1510         event.param.conn.responder_resources = iw_event->ord;
1511
1512         /*
1513          * Protect against the user destroying conn_id from another thread
1514          * until we're done accessing it.
1515          */
1516         atomic_inc(&conn_id->refcount);
1517         ret = conn_id->id.event_handler(&conn_id->id, &event);
1518         if (ret) {
1519                 /* User wants to destroy the CM ID */
1520                 conn_id->cm_id.iw = NULL;
1521                 cma_exch(conn_id, RDMA_CM_DESTROYING);
1522                 mutex_unlock(&conn_id->handler_mutex);
1523                 cma_deref_id(conn_id);
1524                 rdma_destroy_id(&conn_id->id);
1525                 goto out;
1526         }
1527
1528         mutex_unlock(&conn_id->handler_mutex);
1529         cma_deref_id(conn_id);
1530
1531 out:
1532         if (dev)
1533                 dev_put(dev);
1534         mutex_unlock(&listen_id->handler_mutex);
1535         return ret;
1536 }
1537
1538 static int cma_ib_listen(struct rdma_id_private *id_priv)
1539 {
1540         struct ib_cm_compare_data compare_data;
1541         struct sockaddr *addr;
1542         struct ib_cm_id *id;
1543         __be64 svc_id;
1544         int ret;
1545
1546         id = ib_create_cm_id(id_priv->id.device, cma_req_handler, id_priv);
1547         if (IS_ERR(id))
1548                 return PTR_ERR(id);
1549
1550         id_priv->cm_id.ib = id;
1551
1552         addr = cma_src_addr(id_priv);
1553         svc_id = rdma_get_service_id(&id_priv->id, addr);
1554         if (cma_any_addr(addr) && !id_priv->afonly)
1555                 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL);
1556         else {
1557                 cma_set_compare_data(id_priv->id.ps, addr, &compare_data);
1558                 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data);
1559         }
1560
1561         if (ret) {
1562                 ib_destroy_cm_id(id_priv->cm_id.ib);
1563                 id_priv->cm_id.ib = NULL;
1564         }
1565
1566         return ret;
1567 }
1568
1569 static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
1570 {
1571         int ret;
1572         struct iw_cm_id *id;
1573
1574         id = iw_create_cm_id(id_priv->id.device,
1575                              iw_conn_req_handler,
1576                              id_priv);
1577         if (IS_ERR(id))
1578                 return PTR_ERR(id);
1579
1580         id_priv->cm_id.iw = id;
1581
1582         memcpy(&id_priv->cm_id.iw->local_addr, cma_src_addr(id_priv),
1583                rdma_addr_size(cma_src_addr(id_priv)));
1584
1585         ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
1586
1587         if (ret) {
1588                 iw_destroy_cm_id(id_priv->cm_id.iw);
1589                 id_priv->cm_id.iw = NULL;
1590         }
1591
1592         return ret;
1593 }
1594
1595 static int cma_listen_handler(struct rdma_cm_id *id,
1596                               struct rdma_cm_event *event)
1597 {
1598         struct rdma_id_private *id_priv = id->context;
1599
1600         id->context = id_priv->id.context;
1601         id->event_handler = id_priv->id.event_handler;
1602         return id_priv->id.event_handler(id, event);
1603 }
1604
1605 static void cma_listen_on_dev(struct rdma_id_private *id_priv,
1606                               struct cma_device *cma_dev)
1607 {
1608         struct rdma_id_private *dev_id_priv;
1609         struct rdma_cm_id *id;
1610         int ret;
1611
1612         if (cma_family(id_priv) == AF_IB &&
1613             rdma_node_get_transport(cma_dev->device->node_type) != RDMA_TRANSPORT_IB)
1614                 return;
1615
1616         id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps,
1617                             id_priv->id.qp_type);
1618         if (IS_ERR(id))
1619                 return;
1620
1621         dev_id_priv = container_of(id, struct rdma_id_private, id);
1622
1623         dev_id_priv->state = RDMA_CM_ADDR_BOUND;
1624         memcpy(cma_src_addr(dev_id_priv), cma_src_addr(id_priv),
1625                rdma_addr_size(cma_src_addr(id_priv)));
1626
1627         cma_attach_to_dev(dev_id_priv, cma_dev);
1628         list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
1629         atomic_inc(&id_priv->refcount);
1630         dev_id_priv->internal_id = 1;
1631         dev_id_priv->afonly = id_priv->afonly;
1632
1633         ret = rdma_listen(id, id_priv->backlog);
1634         if (ret)
1635                 printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, "
1636                        "listening on device %s\n", ret, cma_dev->device->name);
1637 }
1638
1639 static void cma_listen_on_all(struct rdma_id_private *id_priv)
1640 {
1641         struct cma_device *cma_dev;
1642
1643         mutex_lock(&lock);
1644         list_add_tail(&id_priv->list, &listen_any_list);
1645         list_for_each_entry(cma_dev, &dev_list, list)
1646                 cma_listen_on_dev(id_priv, cma_dev);
1647         mutex_unlock(&lock);
1648 }
1649
1650 void rdma_set_service_type(struct rdma_cm_id *id, int tos)
1651 {
1652         struct rdma_id_private *id_priv;
1653
1654         id_priv = container_of(id, struct rdma_id_private, id);
1655         id_priv->tos = (u8) tos;
1656 }
1657 EXPORT_SYMBOL(rdma_set_service_type);
1658
1659 static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
1660                               void *context)
1661 {
1662         struct cma_work *work = context;
1663         struct rdma_route *route;
1664
1665         route = &work->id->id.route;
1666
1667         if (!status) {
1668                 route->num_paths = 1;
1669                 *route->path_rec = *path_rec;
1670         } else {
1671                 work->old_state = RDMA_CM_ROUTE_QUERY;
1672                 work->new_state = RDMA_CM_ADDR_RESOLVED;
1673                 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
1674                 work->event.status = status;
1675         }
1676
1677         queue_work(cma_wq, &work->work);
1678 }
1679
1680 static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
1681                               struct cma_work *work)
1682 {
1683         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
1684         struct ib_sa_path_rec path_rec;
1685         ib_sa_comp_mask comp_mask;
1686         struct sockaddr_in6 *sin6;
1687         struct sockaddr_ib *sib;
1688
1689         memset(&path_rec, 0, sizeof path_rec);
1690         rdma_addr_get_sgid(dev_addr, &path_rec.sgid);
1691         rdma_addr_get_dgid(dev_addr, &path_rec.dgid);
1692         path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
1693         path_rec.numb_path = 1;
1694         path_rec.reversible = 1;
1695         path_rec.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
1696
1697         comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
1698                     IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
1699                     IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
1700
1701         switch (cma_family(id_priv)) {
1702         case AF_INET:
1703                 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
1704                 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
1705                 break;
1706         case AF_INET6:
1707                 sin6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
1708                 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
1709                 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
1710                 break;
1711         case AF_IB:
1712                 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
1713                 path_rec.traffic_class = (u8) (be32_to_cpu(sib->sib_flowinfo) >> 20);
1714                 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
1715                 break;
1716         }
1717
1718         id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
1719                                                id_priv->id.port_num, &path_rec,
1720                                                comp_mask, timeout_ms,
1721                                                GFP_KERNEL, cma_query_handler,
1722                                                work, &id_priv->query);
1723
1724         return (id_priv->query_id < 0) ? id_priv->query_id : 0;
1725 }
1726
1727 static void cma_work_handler(struct work_struct *_work)
1728 {
1729         struct cma_work *work = container_of(_work, struct cma_work, work);
1730         struct rdma_id_private *id_priv = work->id;
1731         int destroy = 0;
1732
1733         mutex_lock(&id_priv->handler_mutex);
1734         if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
1735                 goto out;
1736
1737         if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1738                 cma_exch(id_priv, RDMA_CM_DESTROYING);
1739                 destroy = 1;
1740         }
1741 out:
1742         mutex_unlock(&id_priv->handler_mutex);
1743         cma_deref_id(id_priv);
1744         if (destroy)
1745                 rdma_destroy_id(&id_priv->id);
1746         kfree(work);
1747 }
1748
1749 static void cma_ndev_work_handler(struct work_struct *_work)
1750 {
1751         struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
1752         struct rdma_id_private *id_priv = work->id;
1753         int destroy = 0;
1754
1755         mutex_lock(&id_priv->handler_mutex);
1756         if (id_priv->state == RDMA_CM_DESTROYING ||
1757             id_priv->state == RDMA_CM_DEVICE_REMOVAL)
1758                 goto out;
1759
1760         if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1761                 cma_exch(id_priv, RDMA_CM_DESTROYING);
1762                 destroy = 1;
1763         }
1764
1765 out:
1766         mutex_unlock(&id_priv->handler_mutex);
1767         cma_deref_id(id_priv);
1768         if (destroy)
1769                 rdma_destroy_id(&id_priv->id);
1770         kfree(work);
1771 }
1772
1773 static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
1774 {
1775         struct rdma_route *route = &id_priv->id.route;
1776         struct cma_work *work;
1777         int ret;
1778
1779         work = kzalloc(sizeof *work, GFP_KERNEL);
1780         if (!work)
1781                 return -ENOMEM;
1782
1783         work->id = id_priv;
1784         INIT_WORK(&work->work, cma_work_handler);
1785         work->old_state = RDMA_CM_ROUTE_QUERY;
1786         work->new_state = RDMA_CM_ROUTE_RESOLVED;
1787         work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1788
1789         route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
1790         if (!route->path_rec) {
1791                 ret = -ENOMEM;
1792                 goto err1;
1793         }
1794
1795         ret = cma_query_ib_route(id_priv, timeout_ms, work);
1796         if (ret)
1797                 goto err2;
1798
1799         return 0;
1800 err2:
1801         kfree(route->path_rec);
1802         route->path_rec = NULL;
1803 err1:
1804         kfree(work);
1805         return ret;
1806 }
1807
1808 int rdma_set_ib_paths(struct rdma_cm_id *id,
1809                       struct ib_sa_path_rec *path_rec, int num_paths)
1810 {
1811         struct rdma_id_private *id_priv;
1812         int ret;
1813
1814         id_priv = container_of(id, struct rdma_id_private, id);
1815         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
1816                            RDMA_CM_ROUTE_RESOLVED))
1817                 return -EINVAL;
1818
1819         id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths,
1820                                      GFP_KERNEL);
1821         if (!id->route.path_rec) {
1822                 ret = -ENOMEM;
1823                 goto err;
1824         }
1825
1826         id->route.num_paths = num_paths;
1827         return 0;
1828 err:
1829         cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED);
1830         return ret;
1831 }
1832 EXPORT_SYMBOL(rdma_set_ib_paths);
1833
1834 static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
1835 {
1836         struct cma_work *work;
1837
1838         work = kzalloc(sizeof *work, GFP_KERNEL);
1839         if (!work)
1840                 return -ENOMEM;
1841
1842         work->id = id_priv;
1843         INIT_WORK(&work->work, cma_work_handler);
1844         work->old_state = RDMA_CM_ROUTE_QUERY;
1845         work->new_state = RDMA_CM_ROUTE_RESOLVED;
1846         work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1847         queue_work(cma_wq, &work->work);
1848         return 0;
1849 }
1850
1851 static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
1852 {
1853         struct rdma_route *route = &id_priv->id.route;
1854         struct rdma_addr *addr = &route->addr;
1855         struct cma_work *work;
1856         int ret;
1857         struct net_device *ndev = NULL;
1858         u16 vid;
1859
1860         work = kzalloc(sizeof *work, GFP_KERNEL);
1861         if (!work)
1862                 return -ENOMEM;
1863
1864         work->id = id_priv;
1865         INIT_WORK(&work->work, cma_work_handler);
1866
1867         route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
1868         if (!route->path_rec) {
1869                 ret = -ENOMEM;
1870                 goto err1;
1871         }
1872
1873         route->num_paths = 1;
1874
1875         if (addr->dev_addr.bound_dev_if)
1876                 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if);
1877         if (!ndev) {
1878                 ret = -ENODEV;
1879                 goto err2;
1880         }
1881
1882         vid = rdma_vlan_dev_vlan_id(ndev);
1883
1884         iboe_mac_vlan_to_ll(&route->path_rec->sgid, addr->dev_addr.src_dev_addr, vid);
1885         iboe_mac_vlan_to_ll(&route->path_rec->dgid, addr->dev_addr.dst_dev_addr, vid);
1886
1887         route->path_rec->hop_limit = 1;
1888         route->path_rec->reversible = 1;
1889         route->path_rec->pkey = cpu_to_be16(0xffff);
1890         route->path_rec->mtu_selector = IB_SA_EQ;
1891         route->path_rec->sl = netdev_get_prio_tc_map(
1892                         ndev->priv_flags & IFF_802_1Q_VLAN ?
1893                                 vlan_dev_real_dev(ndev) : ndev,
1894                         rt_tos2priority(id_priv->tos));
1895
1896         route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
1897         route->path_rec->rate_selector = IB_SA_EQ;
1898         route->path_rec->rate = iboe_get_rate(ndev);
1899         dev_put(ndev);
1900         route->path_rec->packet_life_time_selector = IB_SA_EQ;
1901         route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
1902         if (!route->path_rec->mtu) {
1903                 ret = -EINVAL;
1904                 goto err2;
1905         }
1906
1907         work->old_state = RDMA_CM_ROUTE_QUERY;
1908         work->new_state = RDMA_CM_ROUTE_RESOLVED;
1909         work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1910         work->event.status = 0;
1911
1912         queue_work(cma_wq, &work->work);
1913
1914         return 0;
1915
1916 err2:
1917         kfree(route->path_rec);
1918         route->path_rec = NULL;
1919 err1:
1920         kfree(work);
1921         return ret;
1922 }
1923
1924 int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
1925 {
1926         struct rdma_id_private *id_priv;
1927         int ret;
1928
1929         id_priv = container_of(id, struct rdma_id_private, id);
1930         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY))
1931                 return -EINVAL;
1932
1933         atomic_inc(&id_priv->refcount);
1934         switch (rdma_node_get_transport(id->device->node_type)) {
1935         case RDMA_TRANSPORT_IB:
1936                 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
1937                 case IB_LINK_LAYER_INFINIBAND:
1938                         ret = cma_resolve_ib_route(id_priv, timeout_ms);
1939                         break;
1940                 case IB_LINK_LAYER_ETHERNET:
1941                         ret = cma_resolve_iboe_route(id_priv);
1942                         break;
1943                 default:
1944                         ret = -ENOSYS;
1945                 }
1946                 break;
1947         case RDMA_TRANSPORT_IWARP:
1948                 ret = cma_resolve_iw_route(id_priv, timeout_ms);
1949                 break;
1950         default:
1951                 ret = -ENOSYS;
1952                 break;
1953         }
1954         if (ret)
1955                 goto err;
1956
1957         return 0;
1958 err:
1959         cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED);
1960         cma_deref_id(id_priv);
1961         return ret;
1962 }
1963 EXPORT_SYMBOL(rdma_resolve_route);
1964
1965 static void cma_set_loopback(struct sockaddr *addr)
1966 {
1967         switch (addr->sa_family) {
1968         case AF_INET:
1969                 ((struct sockaddr_in *) addr)->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
1970                 break;
1971         case AF_INET6:
1972                 ipv6_addr_set(&((struct sockaddr_in6 *) addr)->sin6_addr,
1973                               0, 0, 0, htonl(1));
1974                 break;
1975         default:
1976                 ib_addr_set(&((struct sockaddr_ib *) addr)->sib_addr,
1977                             0, 0, 0, htonl(1));
1978                 break;
1979         }
1980 }
1981
1982 static int cma_bind_loopback(struct rdma_id_private *id_priv)
1983 {
1984         struct cma_device *cma_dev, *cur_dev;
1985         struct ib_port_attr port_attr;
1986         union ib_gid gid;
1987         u16 pkey;
1988         int ret;
1989         u8 p;
1990
1991         cma_dev = NULL;
1992         mutex_lock(&lock);
1993         list_for_each_entry(cur_dev, &dev_list, list) {
1994                 if (cma_family(id_priv) == AF_IB &&
1995                     rdma_node_get_transport(cur_dev->device->node_type) != RDMA_TRANSPORT_IB)
1996                         continue;
1997
1998                 if (!cma_dev)
1999                         cma_dev = cur_dev;
2000
2001                 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
2002                         if (!ib_query_port(cur_dev->device, p, &port_attr) &&
2003                             port_attr.state == IB_PORT_ACTIVE) {
2004                                 cma_dev = cur_dev;
2005                                 goto port_found;
2006                         }
2007                 }
2008         }
2009
2010         if (!cma_dev) {
2011                 ret = -ENODEV;
2012                 goto out;
2013         }
2014
2015         p = 1;
2016
2017 port_found:
2018         ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid);
2019         if (ret)
2020                 goto out;
2021
2022         ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
2023         if (ret)
2024                 goto out;
2025
2026         id_priv->id.route.addr.dev_addr.dev_type =
2027                 (rdma_port_get_link_layer(cma_dev->device, p) == IB_LINK_LAYER_INFINIBAND) ?
2028                 ARPHRD_INFINIBAND : ARPHRD_ETHER;
2029
2030         rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2031         ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
2032         id_priv->id.port_num = p;
2033         cma_attach_to_dev(id_priv, cma_dev);
2034         cma_set_loopback(cma_src_addr(id_priv));
2035 out:
2036         mutex_unlock(&lock);
2037         return ret;
2038 }
2039
2040 static void addr_handler(int status, struct sockaddr *src_addr,
2041                          struct rdma_dev_addr *dev_addr, void *context)
2042 {
2043         struct rdma_id_private *id_priv = context;
2044         struct rdma_cm_event event;
2045
2046         memset(&event, 0, sizeof event);
2047         mutex_lock(&id_priv->handler_mutex);
2048         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY,
2049                            RDMA_CM_ADDR_RESOLVED))
2050                 goto out;
2051
2052         if (!status && !id_priv->cma_dev)
2053                 status = cma_acquire_dev(id_priv);
2054
2055         if (status) {
2056                 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2057                                    RDMA_CM_ADDR_BOUND))
2058                         goto out;
2059                 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2060                 event.status = status;
2061         } else {
2062                 memcpy(cma_src_addr(id_priv), src_addr, rdma_addr_size(src_addr));
2063                 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2064         }
2065
2066         if (id_priv->id.event_handler(&id_priv->id, &event)) {
2067                 cma_exch(id_priv, RDMA_CM_DESTROYING);
2068                 mutex_unlock(&id_priv->handler_mutex);
2069                 cma_deref_id(id_priv);
2070                 rdma_destroy_id(&id_priv->id);
2071                 return;
2072         }
2073 out:
2074         mutex_unlock(&id_priv->handler_mutex);
2075         cma_deref_id(id_priv);
2076 }
2077
2078 static int cma_resolve_loopback(struct rdma_id_private *id_priv)
2079 {
2080         struct cma_work *work;
2081         union ib_gid gid;
2082         int ret;
2083
2084         work = kzalloc(sizeof *work, GFP_KERNEL);
2085         if (!work)
2086                 return -ENOMEM;
2087
2088         if (!id_priv->cma_dev) {
2089                 ret = cma_bind_loopback(id_priv);
2090                 if (ret)
2091                         goto err;
2092         }
2093
2094         rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2095         rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
2096
2097         work->id = id_priv;
2098         INIT_WORK(&work->work, cma_work_handler);
2099         work->old_state = RDMA_CM_ADDR_QUERY;
2100         work->new_state = RDMA_CM_ADDR_RESOLVED;
2101         work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2102         queue_work(cma_wq, &work->work);
2103         return 0;
2104 err:
2105         kfree(work);
2106         return ret;
2107 }
2108
2109 static int cma_resolve_ib_addr(struct rdma_id_private *id_priv)
2110 {
2111         struct cma_work *work;
2112         int ret;
2113
2114         work = kzalloc(sizeof *work, GFP_KERNEL);
2115         if (!work)
2116                 return -ENOMEM;
2117
2118         if (!id_priv->cma_dev) {
2119                 ret = cma_resolve_ib_dev(id_priv);
2120                 if (ret)
2121                         goto err;
2122         }
2123
2124         rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, (union ib_gid *)
2125                 &(((struct sockaddr_ib *) &id_priv->id.route.addr.dst_addr)->sib_addr));
2126
2127         work->id = id_priv;
2128         INIT_WORK(&work->work, cma_work_handler);
2129         work->old_state = RDMA_CM_ADDR_QUERY;
2130         work->new_state = RDMA_CM_ADDR_RESOLVED;
2131         work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2132         queue_work(cma_wq, &work->work);
2133         return 0;
2134 err:
2135         kfree(work);
2136         return ret;
2137 }
2138
2139 static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2140                          struct sockaddr *dst_addr)
2141 {
2142         if (!src_addr || !src_addr->sa_family) {
2143                 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
2144                 src_addr->sa_family = dst_addr->sa_family;
2145                 if (dst_addr->sa_family == AF_INET6) {
2146                         ((struct sockaddr_in6 *) src_addr)->sin6_scope_id =
2147                                 ((struct sockaddr_in6 *) dst_addr)->sin6_scope_id;
2148                 } else if (dst_addr->sa_family == AF_IB) {
2149                         ((struct sockaddr_ib *) src_addr)->sib_pkey =
2150                                 ((struct sockaddr_ib *) dst_addr)->sib_pkey;
2151                 }
2152         }
2153         return rdma_bind_addr(id, src_addr);
2154 }
2155
2156 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2157                       struct sockaddr *dst_addr, int timeout_ms)
2158 {
2159         struct rdma_id_private *id_priv;
2160         int ret;
2161
2162         id_priv = container_of(id, struct rdma_id_private, id);
2163         if (id_priv->state == RDMA_CM_IDLE) {
2164                 ret = cma_bind_addr(id, src_addr, dst_addr);
2165                 if (ret)
2166                         return ret;
2167         }
2168
2169         if (cma_family(id_priv) != dst_addr->sa_family)
2170                 return -EINVAL;
2171
2172         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY))
2173                 return -EINVAL;
2174
2175         atomic_inc(&id_priv->refcount);
2176         memcpy(cma_dst_addr(id_priv), dst_addr, rdma_addr_size(dst_addr));
2177         if (cma_any_addr(dst_addr)) {
2178                 ret = cma_resolve_loopback(id_priv);
2179         } else {
2180                 if (dst_addr->sa_family == AF_IB) {
2181                         ret = cma_resolve_ib_addr(id_priv);
2182                 } else {
2183                         ret = rdma_resolve_ip(&addr_client, cma_src_addr(id_priv),
2184                                               dst_addr, &id->route.addr.dev_addr,
2185                                               timeout_ms, addr_handler, id_priv);
2186                 }
2187         }
2188         if (ret)
2189                 goto err;
2190
2191         return 0;
2192 err:
2193         cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
2194         cma_deref_id(id_priv);
2195         return ret;
2196 }
2197 EXPORT_SYMBOL(rdma_resolve_addr);
2198
2199 int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
2200 {
2201         struct rdma_id_private *id_priv;
2202         unsigned long flags;
2203         int ret;
2204
2205         id_priv = container_of(id, struct rdma_id_private, id);
2206         spin_lock_irqsave(&id_priv->lock, flags);
2207         if (reuse || id_priv->state == RDMA_CM_IDLE) {
2208                 id_priv->reuseaddr = reuse;
2209                 ret = 0;
2210         } else {
2211                 ret = -EINVAL;
2212         }
2213         spin_unlock_irqrestore(&id_priv->lock, flags);
2214         return ret;
2215 }
2216 EXPORT_SYMBOL(rdma_set_reuseaddr);
2217
2218 int rdma_set_afonly(struct rdma_cm_id *id, int afonly)
2219 {
2220         struct rdma_id_private *id_priv;
2221         unsigned long flags;
2222         int ret;
2223
2224         id_priv = container_of(id, struct rdma_id_private, id);
2225         spin_lock_irqsave(&id_priv->lock, flags);
2226         if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) {
2227                 id_priv->options |= (1 << CMA_OPTION_AFONLY);
2228                 id_priv->afonly = afonly;
2229                 ret = 0;
2230         } else {
2231                 ret = -EINVAL;
2232         }
2233         spin_unlock_irqrestore(&id_priv->lock, flags);
2234         return ret;
2235 }
2236 EXPORT_SYMBOL(rdma_set_afonly);
2237
2238 static void cma_bind_port(struct rdma_bind_list *bind_list,
2239                           struct rdma_id_private *id_priv)
2240 {
2241         struct sockaddr *addr;
2242         struct sockaddr_ib *sib;
2243         u64 sid, mask;
2244         __be16 port;
2245
2246         addr = cma_src_addr(id_priv);
2247         port = htons(bind_list->port);
2248
2249         switch (addr->sa_family) {
2250         case AF_INET:
2251                 ((struct sockaddr_in *) addr)->sin_port = port;
2252                 break;
2253         case AF_INET6:
2254                 ((struct sockaddr_in6 *) addr)->sin6_port = port;
2255                 break;
2256         case AF_IB:
2257                 sib = (struct sockaddr_ib *) addr;
2258                 sid = be64_to_cpu(sib->sib_sid);
2259                 mask = be64_to_cpu(sib->sib_sid_mask);
2260                 sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port));
2261                 sib->sib_sid_mask = cpu_to_be64(~0ULL);
2262                 break;
2263         }
2264         id_priv->bind_list = bind_list;
2265         hlist_add_head(&id_priv->node, &bind_list->owners);
2266 }
2267
2268 static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv,
2269                           unsigned short snum)
2270 {
2271         struct rdma_bind_list *bind_list;
2272         int ret;
2273
2274         bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
2275         if (!bind_list)
2276                 return -ENOMEM;
2277
2278         ret = idr_alloc(ps, bind_list, snum, snum + 1, GFP_KERNEL);
2279         if (ret < 0)
2280                 goto err;
2281
2282         bind_list->ps = ps;
2283         bind_list->port = (unsigned short)ret;
2284         cma_bind_port(bind_list, id_priv);
2285         return 0;
2286 err:
2287         kfree(bind_list);
2288         return ret == -ENOSPC ? -EADDRNOTAVAIL : ret;
2289 }
2290
2291 static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv)
2292 {
2293         static unsigned int last_used_port;
2294         int low, high, remaining;
2295         unsigned int rover;
2296
2297         inet_get_local_port_range(&low, &high);
2298         remaining = (high - low) + 1;
2299         rover = net_random() % remaining + low;
2300 retry:
2301         if (last_used_port != rover &&
2302             !idr_find(ps, (unsigned short) rover)) {
2303                 int ret = cma_alloc_port(ps, id_priv, rover);
2304                 /*
2305                  * Remember previously used port number in order to avoid
2306                  * re-using same port immediately after it is closed.
2307                  */
2308                 if (!ret)
2309                         last_used_port = rover;
2310                 if (ret != -EADDRNOTAVAIL)
2311                         return ret;
2312         }
2313         if (--remaining) {
2314                 rover++;
2315                 if ((rover < low) || (rover > high))
2316                         rover = low;
2317                 goto retry;
2318         }
2319         return -EADDRNOTAVAIL;
2320 }
2321
2322 /*
2323  * Check that the requested port is available.  This is called when trying to
2324  * bind to a specific port, or when trying to listen on a bound port.  In
2325  * the latter case, the provided id_priv may already be on the bind_list, but
2326  * we still need to check that it's okay to start listening.
2327  */
2328 static int cma_check_port(struct rdma_bind_list *bind_list,
2329                           struct rdma_id_private *id_priv, uint8_t reuseaddr)
2330 {
2331         struct rdma_id_private *cur_id;
2332         struct sockaddr *addr, *cur_addr;
2333
2334         addr = cma_src_addr(id_priv);
2335         hlist_for_each_entry(cur_id, &bind_list->owners, node) {
2336                 if (id_priv == cur_id)
2337                         continue;
2338
2339                 if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr &&
2340                     cur_id->reuseaddr)
2341                         continue;
2342
2343                 cur_addr = cma_src_addr(cur_id);
2344                 if (id_priv->afonly && cur_id->afonly &&
2345                     (addr->sa_family != cur_addr->sa_family))
2346                         continue;
2347
2348                 if (cma_any_addr(addr) || cma_any_addr(cur_addr))
2349                         return -EADDRNOTAVAIL;
2350
2351                 if (!cma_addr_cmp(addr, cur_addr))
2352                         return -EADDRINUSE;
2353         }
2354         return 0;
2355 }
2356
2357 static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv)
2358 {
2359         struct rdma_bind_list *bind_list;
2360         unsigned short snum;
2361         int ret;
2362
2363         snum = ntohs(cma_port(cma_src_addr(id_priv)));
2364         if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
2365                 return -EACCES;
2366
2367         bind_list = idr_find(ps, snum);
2368         if (!bind_list) {
2369                 ret = cma_alloc_port(ps, id_priv, snum);
2370         } else {
2371                 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
2372                 if (!ret)
2373                         cma_bind_port(bind_list, id_priv);
2374         }
2375         return ret;
2376 }
2377
2378 static int cma_bind_listen(struct rdma_id_private *id_priv)
2379 {
2380         struct rdma_bind_list *bind_list = id_priv->bind_list;
2381         int ret = 0;
2382
2383         mutex_lock(&lock);
2384         if (bind_list->owners.first->next)
2385                 ret = cma_check_port(bind_list, id_priv, 0);
2386         mutex_unlock(&lock);
2387         return ret;
2388 }
2389
2390 static struct idr *cma_select_inet_ps(struct rdma_id_private *id_priv)
2391 {
2392         switch (id_priv->id.ps) {
2393         case RDMA_PS_TCP:
2394                 return &tcp_ps;
2395         case RDMA_PS_UDP:
2396                 return &udp_ps;
2397         case RDMA_PS_IPOIB:
2398                 return &ipoib_ps;
2399         case RDMA_PS_IB:
2400                 return &ib_ps;
2401         default:
2402                 return NULL;
2403         }
2404 }
2405
2406 static struct idr *cma_select_ib_ps(struct rdma_id_private *id_priv)
2407 {
2408         struct idr *ps = NULL;
2409         struct sockaddr_ib *sib;
2410         u64 sid_ps, mask, sid;
2411
2412         sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
2413         mask = be64_to_cpu(sib->sib_sid_mask) & RDMA_IB_IP_PS_MASK;
2414         sid = be64_to_cpu(sib->sib_sid) & mask;
2415
2416         if ((id_priv->id.ps == RDMA_PS_IB) && (sid == (RDMA_IB_IP_PS_IB & mask))) {
2417                 sid_ps = RDMA_IB_IP_PS_IB;
2418                 ps = &ib_ps;
2419         } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_TCP)) &&
2420                    (sid == (RDMA_IB_IP_PS_TCP & mask))) {
2421                 sid_ps = RDMA_IB_IP_PS_TCP;
2422                 ps = &tcp_ps;
2423         } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_UDP)) &&
2424                    (sid == (RDMA_IB_IP_PS_UDP & mask))) {
2425                 sid_ps = RDMA_IB_IP_PS_UDP;
2426                 ps = &udp_ps;
2427         }
2428
2429         if (ps) {
2430                 sib->sib_sid = cpu_to_be64(sid_ps | ntohs(cma_port((struct sockaddr *) sib)));
2431                 sib->sib_sid_mask = cpu_to_be64(RDMA_IB_IP_PS_MASK |
2432                                                 be64_to_cpu(sib->sib_sid_mask));
2433         }
2434         return ps;
2435 }
2436
2437 static int cma_get_port(struct rdma_id_private *id_priv)
2438 {
2439         struct idr *ps;
2440         int ret;
2441
2442         if (cma_family(id_priv) != AF_IB)
2443                 ps = cma_select_inet_ps(id_priv);
2444         else
2445                 ps = cma_select_ib_ps(id_priv);
2446         if (!ps)
2447                 return -EPROTONOSUPPORT;
2448
2449         mutex_lock(&lock);
2450         if (cma_any_port(cma_src_addr(id_priv)))
2451                 ret = cma_alloc_any_port(ps, id_priv);
2452         else
2453                 ret = cma_use_port(ps, id_priv);
2454         mutex_unlock(&lock);
2455
2456         return ret;
2457 }
2458
2459 static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
2460                                struct sockaddr *addr)
2461 {
2462 #if IS_ENABLED(CONFIG_IPV6)
2463         struct sockaddr_in6 *sin6;
2464
2465         if (addr->sa_family != AF_INET6)
2466                 return 0;
2467
2468         sin6 = (struct sockaddr_in6 *) addr;
2469         if ((ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) &&
2470             !sin6->sin6_scope_id)
2471                         return -EINVAL;
2472
2473         dev_addr->bound_dev_if = sin6->sin6_scope_id;
2474 #endif
2475         return 0;
2476 }
2477
2478 int rdma_listen(struct rdma_cm_id *id, int backlog)
2479 {
2480         struct rdma_id_private *id_priv;
2481         int ret;
2482
2483         id_priv = container_of(id, struct rdma_id_private, id);
2484         if (id_priv->state == RDMA_CM_IDLE) {
2485                 id->route.addr.src_addr.ss_family = AF_INET;
2486                 ret = rdma_bind_addr(id, cma_src_addr(id_priv));
2487                 if (ret)
2488                         return ret;
2489         }
2490
2491         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN))
2492                 return -EINVAL;
2493
2494         if (id_priv->reuseaddr) {
2495                 ret = cma_bind_listen(id_priv);
2496                 if (ret)
2497                         goto err;
2498         }
2499
2500         id_priv->backlog = backlog;
2501         if (id->device) {
2502                 switch (rdma_node_get_transport(id->device->node_type)) {
2503                 case RDMA_TRANSPORT_IB:
2504                         ret = cma_ib_listen(id_priv);
2505                         if (ret)
2506                                 goto err;
2507                         break;
2508                 case RDMA_TRANSPORT_IWARP:
2509                         ret = cma_iw_listen(id_priv, backlog);
2510                         if (ret)
2511                                 goto err;
2512                         break;
2513                 default:
2514                         ret = -ENOSYS;
2515                         goto err;
2516                 }
2517         } else
2518                 cma_listen_on_all(id_priv);
2519
2520         return 0;
2521 err:
2522         id_priv->backlog = 0;
2523         cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND);
2524         return ret;
2525 }
2526 EXPORT_SYMBOL(rdma_listen);
2527
2528 int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
2529 {
2530         struct rdma_id_private *id_priv;
2531         int ret;
2532
2533         if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6 &&
2534             addr->sa_family != AF_IB)
2535                 return -EAFNOSUPPORT;
2536
2537         id_priv = container_of(id, struct rdma_id_private, id);
2538         if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND))
2539                 return -EINVAL;
2540
2541         ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
2542         if (ret)
2543                 goto err1;
2544
2545         if (!cma_any_addr(addr)) {
2546                 ret = cma_translate_addr(addr, &id->route.addr.dev_addr);
2547                 if (ret)
2548                         goto err1;
2549
2550                 ret = cma_acquire_dev(id_priv);
2551                 if (ret)
2552                         goto err1;
2553         }
2554
2555         memcpy(cma_src_addr(id_priv), addr, rdma_addr_size(addr));
2556         if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) {
2557                 if (addr->sa_family == AF_INET)
2558                         id_priv->afonly = 1;
2559 #if IS_ENABLED(CONFIG_IPV6)
2560                 else if (addr->sa_family == AF_INET6)
2561                         id_priv->afonly = init_net.ipv6.sysctl.bindv6only;
2562 #endif
2563         }
2564         ret = cma_get_port(id_priv);
2565         if (ret)
2566                 goto err2;
2567
2568         return 0;
2569 err2:
2570         if (id_priv->cma_dev)
2571                 cma_release_dev(id_priv);
2572 err1:
2573         cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE);
2574         return ret;
2575 }
2576 EXPORT_SYMBOL(rdma_bind_addr);
2577
2578 static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv)
2579 {
2580         struct cma_hdr *cma_hdr;
2581
2582         cma_hdr = hdr;
2583         cma_hdr->cma_version = CMA_VERSION;
2584         if (cma_family(id_priv) == AF_INET) {
2585                 struct sockaddr_in *src4, *dst4;
2586
2587                 src4 = (struct sockaddr_in *) cma_src_addr(id_priv);
2588                 dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv);
2589
2590                 cma_set_ip_ver(cma_hdr, 4);
2591                 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2592                 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2593                 cma_hdr->port = src4->sin_port;
2594         } else if (cma_family(id_priv) == AF_INET6) {
2595                 struct sockaddr_in6 *src6, *dst6;
2596
2597                 src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
2598                 dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv);
2599
2600                 cma_set_ip_ver(cma_hdr, 6);
2601                 cma_hdr->src_addr.ip6 = src6->sin6_addr;
2602                 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
2603                 cma_hdr->port = src6->sin6_port;
2604         }
2605         return 0;
2606 }
2607
2608 static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
2609                                 struct ib_cm_event *ib_event)
2610 {
2611         struct rdma_id_private *id_priv = cm_id->context;
2612         struct rdma_cm_event event;
2613         struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
2614         int ret = 0;
2615
2616         if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
2617                 return 0;
2618
2619         memset(&event, 0, sizeof event);
2620         switch (ib_event->event) {
2621         case IB_CM_SIDR_REQ_ERROR:
2622                 event.event = RDMA_CM_EVENT_UNREACHABLE;
2623                 event.status = -ETIMEDOUT;
2624                 break;
2625         case IB_CM_SIDR_REP_RECEIVED:
2626                 event.param.ud.private_data = ib_event->private_data;
2627                 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
2628                 if (rep->status != IB_SIDR_SUCCESS) {
2629                         event.event = RDMA_CM_EVENT_UNREACHABLE;
2630                         event.status = ib_event->param.sidr_rep_rcvd.status;
2631                         break;
2632                 }
2633                 ret = cma_set_qkey(id_priv, rep->qkey);
2634                 if (ret) {
2635                         event.event = RDMA_CM_EVENT_ADDR_ERROR;
2636                         event.status = ret;
2637                         break;
2638                 }
2639                 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
2640                                      id_priv->id.route.path_rec,
2641                                      &event.param.ud.ah_attr);
2642                 event.param.ud.qp_num = rep->qpn;
2643                 event.param.ud.qkey = rep->qkey;
2644                 event.event = RDMA_CM_EVENT_ESTABLISHED;
2645                 event.status = 0;
2646                 break;
2647         default:
2648                 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
2649                        ib_event->event);
2650                 goto out;
2651         }
2652
2653         ret = id_priv->id.event_handler(&id_priv->id, &event);
2654         if (ret) {
2655                 /* Destroy the CM ID by returning a non-zero value. */
2656                 id_priv->cm_id.ib = NULL;
2657                 cma_exch(id_priv, RDMA_CM_DESTROYING);
2658                 mutex_unlock(&id_priv->handler_mutex);
2659                 rdma_destroy_id(&id_priv->id);
2660                 return ret;
2661         }
2662 out:
2663         mutex_unlock(&id_priv->handler_mutex);
2664         return ret;
2665 }
2666
2667 static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
2668                               struct rdma_conn_param *conn_param)
2669 {
2670         struct ib_cm_sidr_req_param req;
2671         struct ib_cm_id *id;
2672         void *private_data;
2673         int offset, ret;
2674
2675         memset(&req, 0, sizeof req);
2676         offset = cma_user_data_offset(id_priv);
2677         req.private_data_len = offset + conn_param->private_data_len;
2678         if (req.private_data_len < conn_param->private_data_len)
2679                 return -EINVAL;
2680
2681         if (req.private_data_len) {
2682                 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2683                 if (!private_data)
2684                         return -ENOMEM;
2685         } else {
2686                 private_data = NULL;
2687         }
2688
2689         if (conn_param->private_data && conn_param->private_data_len)
2690                 memcpy(private_data + offset, conn_param->private_data,
2691                        conn_param->private_data_len);
2692
2693         if (private_data) {
2694                 ret = cma_format_hdr(private_data, id_priv);
2695                 if (ret)
2696                         goto out;
2697                 req.private_data = private_data;
2698         }
2699
2700         id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler,
2701                              id_priv);
2702         if (IS_ERR(id)) {
2703                 ret = PTR_ERR(id);
2704                 goto out;
2705         }
2706         id_priv->cm_id.ib = id;
2707
2708         req.path = id_priv->id.route.path_rec;
2709         req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
2710         req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
2711         req.max_cm_retries = CMA_MAX_CM_RETRIES;
2712
2713         ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
2714         if (ret) {
2715                 ib_destroy_cm_id(id_priv->cm_id.ib);
2716                 id_priv->cm_id.ib = NULL;
2717         }
2718 out:
2719         kfree(private_data);
2720         return ret;
2721 }
2722
2723 static int cma_connect_ib(struct rdma_id_private *id_priv,
2724                           struct rdma_conn_param *conn_param)
2725 {
2726         struct ib_cm_req_param req;
2727         struct rdma_route *route;
2728         void *private_data;
2729         struct ib_cm_id *id;
2730         int offset, ret;
2731
2732         memset(&req, 0, sizeof req);
2733         offset = cma_user_data_offset(id_priv);
2734         req.private_data_len = offset + conn_param->private_data_len;
2735         if (req.private_data_len < conn_param->private_data_len)
2736                 return -EINVAL;
2737
2738         if (req.private_data_len) {
2739                 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2740                 if (!private_data)
2741                         return -ENOMEM;
2742         } else {
2743                 private_data = NULL;
2744         }
2745
2746         if (conn_param->private_data && conn_param->private_data_len)
2747                 memcpy(private_data + offset, conn_param->private_data,
2748                        conn_param->private_data_len);
2749
2750         id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv);
2751         if (IS_ERR(id)) {
2752                 ret = PTR_ERR(id);
2753                 goto out;
2754         }
2755         id_priv->cm_id.ib = id;
2756
2757         route = &id_priv->id.route;
2758         if (private_data) {
2759                 ret = cma_format_hdr(private_data, id_priv);
2760                 if (ret)
2761                         goto out;
2762                 req.private_data = private_data;
2763         }
2764
2765         req.primary_path = &route->path_rec[0];
2766         if (route->num_paths == 2)
2767                 req.alternate_path = &route->path_rec[1];
2768
2769         req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
2770         req.qp_num = id_priv->qp_num;
2771         req.qp_type = id_priv->id.qp_type;
2772         req.starting_psn = id_priv->seq_num;
2773         req.responder_resources = conn_param->responder_resources;
2774         req.initiator_depth = conn_param->initiator_depth;
2775         req.flow_control = conn_param->flow_control;
2776         req.retry_count = min_t(u8, 7, conn_param->retry_count);
2777         req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
2778         req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2779         req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2780         req.max_cm_retries = CMA_MAX_CM_RETRIES;
2781         req.srq = id_priv->srq ? 1 : 0;
2782
2783         ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
2784 out:
2785         if (ret && !IS_ERR(id)) {
2786                 ib_destroy_cm_id(id);
2787                 id_priv->cm_id.ib = NULL;
2788         }
2789
2790         kfree(private_data);
2791         return ret;
2792 }
2793
2794 static int cma_connect_iw(struct rdma_id_private *id_priv,
2795                           struct rdma_conn_param *conn_param)
2796 {
2797         struct iw_cm_id *cm_id;
2798         int ret;
2799         struct iw_cm_conn_param iw_param;
2800
2801         cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
2802         if (IS_ERR(cm_id))
2803                 return PTR_ERR(cm_id);
2804
2805         id_priv->cm_id.iw = cm_id;
2806
2807         memcpy(&cm_id->local_addr, cma_src_addr(id_priv),
2808                rdma_addr_size(cma_src_addr(id_priv)));
2809         memcpy(&cm_id->remote_addr, cma_dst_addr(id_priv),
2810                rdma_addr_size(cma_dst_addr(id_priv)));
2811
2812         ret = cma_modify_qp_rtr(id_priv, conn_param);
2813         if (ret)
2814                 goto out;
2815
2816         if (conn_param) {
2817                 iw_param.ord = conn_param->initiator_depth;
2818                 iw_param.ird = conn_param->responder_resources;
2819                 iw_param.private_data = conn_param->private_data;
2820                 iw_param.private_data_len = conn_param->private_data_len;
2821                 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num;
2822         } else {
2823                 memset(&iw_param, 0, sizeof iw_param);
2824                 iw_param.qpn = id_priv->qp_num;
2825         }
2826         ret = iw_cm_connect(cm_id, &iw_param);
2827 out:
2828         if (ret) {
2829                 iw_destroy_cm_id(cm_id);
2830                 id_priv->cm_id.iw = NULL;
2831         }
2832         return ret;
2833 }
2834
2835 int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2836 {
2837         struct rdma_id_private *id_priv;
2838         int ret;
2839
2840         id_priv = container_of(id, struct rdma_id_private, id);
2841         if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT))
2842                 return -EINVAL;
2843
2844         if (!id->qp) {
2845                 id_priv->qp_num = conn_param->qp_num;
2846                 id_priv->srq = conn_param->srq;
2847         }
2848
2849         switch (rdma_node_get_transport(id->device->node_type)) {
2850         case RDMA_TRANSPORT_IB:
2851                 if (id->qp_type == IB_QPT_UD)
2852                         ret = cma_resolve_ib_udp(id_priv, conn_param);
2853                 else
2854                         ret = cma_connect_ib(id_priv, conn_param);
2855                 break;
2856         case RDMA_TRANSPORT_IWARP:
2857                 ret = cma_connect_iw(id_priv, conn_param);
2858                 break;
2859         default:
2860                 ret = -ENOSYS;
2861                 break;
2862         }
2863         if (ret)
2864                 goto err;
2865
2866         return 0;
2867 err:
2868         cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED);
2869         return ret;
2870 }
2871 EXPORT_SYMBOL(rdma_connect);
2872
2873 static int cma_accept_ib(struct rdma_id_private *id_priv,
2874                          struct rdma_conn_param *conn_param)
2875 {
2876         struct ib_cm_rep_param rep;
2877         int ret;
2878
2879         ret = cma_modify_qp_rtr(id_priv, conn_param);
2880         if (ret)
2881                 goto out;
2882
2883         ret = cma_modify_qp_rts(id_priv, conn_param);
2884         if (ret)
2885                 goto out;
2886
2887         memset(&rep, 0, sizeof rep);
2888         rep.qp_num = id_priv->qp_num;
2889         rep.starting_psn = id_priv->seq_num;
2890         rep.private_data = conn_param->private_data;
2891         rep.private_data_len = conn_param->private_data_len;
2892         rep.responder_resources = conn_param->responder_resources;
2893         rep.initiator_depth = conn_param->initiator_depth;
2894         rep.failover_accepted = 0;
2895         rep.flow_control = conn_param->flow_control;
2896         rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
2897         rep.srq = id_priv->srq ? 1 : 0;
2898
2899         ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
2900 out:
2901         return ret;
2902 }
2903
2904 static int cma_accept_iw(struct rdma_id_private *id_priv,
2905                   struct rdma_conn_param *conn_param)
2906 {
2907         struct iw_cm_conn_param iw_param;
2908         int ret;
2909
2910         ret = cma_modify_qp_rtr(id_priv, conn_param);
2911         if (ret)
2912                 return ret;
2913
2914         iw_param.ord = conn_param->initiator_depth;
2915         iw_param.ird = conn_param->responder_resources;
2916         iw_param.private_data = conn_param->private_data;
2917         iw_param.private_data_len = conn_param->private_data_len;
2918         if (id_priv->id.qp) {
2919                 iw_param.qpn = id_priv->qp_num;
2920         } else
2921                 iw_param.qpn = conn_param->qp_num;
2922
2923         return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
2924 }
2925
2926 static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
2927                              enum ib_cm_sidr_status status, u32 qkey,
2928                              const void *private_data, int private_data_len)
2929 {
2930         struct ib_cm_sidr_rep_param rep;
2931         int ret;
2932
2933         memset(&rep, 0, sizeof rep);
2934         rep.status = status;
2935         if (status == IB_SIDR_SUCCESS) {
2936                 ret = cma_set_qkey(id_priv, qkey);
2937                 if (ret)
2938                         return ret;
2939                 rep.qp_num = id_priv->qp_num;
2940                 rep.qkey = id_priv->qkey;
2941         }
2942         rep.private_data = private_data;
2943         rep.private_data_len = private_data_len;
2944
2945         return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
2946 }
2947
2948 int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2949 {
2950         struct rdma_id_private *id_priv;
2951         int ret;
2952
2953         id_priv = container_of(id, struct rdma_id_private, id);
2954
2955         id_priv->owner = task_pid_nr(current);
2956
2957         if (!cma_comp(id_priv, RDMA_CM_CONNECT))
2958                 return -EINVAL;
2959
2960         if (!id->qp && conn_param) {
2961                 id_priv->qp_num = conn_param->qp_num;
2962                 id_priv->srq = conn_param->srq;
2963         }
2964
2965         switch (rdma_node_get_transport(id->device->node_type)) {
2966         case RDMA_TRANSPORT_IB:
2967                 if (id->qp_type == IB_QPT_UD) {
2968                         if (conn_param)
2969                                 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
2970                                                         conn_param->qkey,
2971                                                         conn_param->private_data,
2972                                                         conn_param->private_data_len);
2973                         else
2974                                 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
2975                                                         0, NULL, 0);
2976                 } else {
2977                         if (conn_param)
2978                                 ret = cma_accept_ib(id_priv, conn_param);
2979                         else
2980                                 ret = cma_rep_recv(id_priv);
2981                 }
2982                 break;
2983         case RDMA_TRANSPORT_IWARP:
2984                 ret = cma_accept_iw(id_priv, conn_param);
2985                 break;
2986         default:
2987                 ret = -ENOSYS;
2988                 break;
2989         }
2990
2991         if (ret)
2992                 goto reject;
2993
2994         return 0;
2995 reject:
2996         cma_modify_qp_err(id_priv);
2997         rdma_reject(id, NULL, 0);
2998         return ret;
2999 }
3000 EXPORT_SYMBOL(rdma_accept);
3001
3002 int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
3003 {
3004         struct rdma_id_private *id_priv;
3005         int ret;
3006
3007         id_priv = container_of(id, struct rdma_id_private, id);
3008         if (!id_priv->cm_id.ib)
3009                 return -EINVAL;
3010
3011         switch (id->device->node_type) {
3012         case RDMA_NODE_IB_CA:
3013                 ret = ib_cm_notify(id_priv->cm_id.ib, event);
3014                 break;
3015         default:
3016                 ret = 0;
3017                 break;
3018         }
3019         return ret;
3020 }
3021 EXPORT_SYMBOL(rdma_notify);
3022
3023 int rdma_reject(struct rdma_cm_id *id, const void *private_data,
3024                 u8 private_data_len)
3025 {
3026         struct rdma_id_private *id_priv;
3027         int ret;
3028
3029         id_priv = container_of(id, struct rdma_id_private, id);
3030         if (!id_priv->cm_id.ib)
3031                 return -EINVAL;
3032
3033         switch (rdma_node_get_transport(id->device->node_type)) {
3034         case RDMA_TRANSPORT_IB:
3035                 if (id->qp_type == IB_QPT_UD)
3036                         ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0,
3037                                                 private_data, private_data_len);
3038                 else
3039                         ret = ib_send_cm_rej(id_priv->cm_id.ib,
3040                                              IB_CM_REJ_CONSUMER_DEFINED, NULL,
3041                                              0, private_data, private_data_len);
3042                 break;
3043         case RDMA_TRANSPORT_IWARP:
3044                 ret = iw_cm_reject(id_priv->cm_id.iw,
3045                                    private_data, private_data_len);
3046                 break;
3047         default:
3048                 ret = -ENOSYS;
3049                 break;
3050         }
3051         return ret;
3052 }
3053 EXPORT_SYMBOL(rdma_reject);
3054
3055 int rdma_disconnect(struct rdma_cm_id *id)
3056 {
3057         struct rdma_id_private *id_priv;
3058         int ret;
3059
3060         id_priv = container_of(id, struct rdma_id_private, id);
3061         if (!id_priv->cm_id.ib)
3062                 return -EINVAL;
3063
3064         switch (rdma_node_get_transport(id->device->node_type)) {
3065         case RDMA_TRANSPORT_IB:
3066                 ret = cma_modify_qp_err(id_priv);
3067                 if (ret)
3068                         goto out;
3069                 /* Initiate or respond to a disconnect. */
3070                 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
3071                         ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
3072                 break;
3073         case RDMA_TRANSPORT_IWARP:
3074                 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
3075                 break;
3076         default:
3077                 ret = -EINVAL;
3078                 break;
3079         }
3080 out:
3081         return ret;
3082 }
3083 EXPORT_SYMBOL(rdma_disconnect);
3084
3085 static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
3086 {
3087         struct rdma_id_private *id_priv;
3088         struct cma_multicast *mc = multicast->context;
3089         struct rdma_cm_event event;
3090         int ret;
3091
3092         id_priv = mc->id_priv;
3093         if (cma_disable_callback(id_priv, RDMA_CM_ADDR_BOUND) &&
3094             cma_disable_callback(id_priv, RDMA_CM_ADDR_RESOLVED))
3095                 return 0;
3096
3097         if (!status)
3098                 status = cma_set_qkey(id_priv, be32_to_cpu(multicast->rec.qkey));
3099         mutex_lock(&id_priv->qp_mutex);
3100         if (!status && id_priv->id.qp)
3101                 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
3102                                          be16_to_cpu(multicast->rec.mlid));
3103         mutex_unlock(&id_priv->qp_mutex);
3104
3105         memset(&event, 0, sizeof event);
3106         event.status = status;
3107         event.param.ud.private_data = mc->context;
3108         if (!status) {
3109                 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
3110                 ib_init_ah_from_mcmember(id_priv->id.device,
3111                                          id_priv->id.port_num, &multicast->rec,
3112                                          &event.param.ud.ah_attr);
3113                 event.param.ud.qp_num = 0xFFFFFF;
3114                 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
3115         } else
3116                 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
3117
3118         ret = id_priv->id.event_handler(&id_priv->id, &event);
3119         if (ret) {
3120                 cma_exch(id_priv, RDMA_CM_DESTROYING);
3121                 mutex_unlock(&id_priv->handler_mutex);
3122                 rdma_destroy_id(&id_priv->id);
3123                 return 0;
3124         }
3125
3126         mutex_unlock(&id_priv->handler_mutex);
3127         return 0;
3128 }
3129
3130 static void cma_set_mgid(struct rdma_id_private *id_priv,
3131                          struct sockaddr *addr, union ib_gid *mgid)
3132 {
3133         unsigned char mc_map[MAX_ADDR_LEN];
3134         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3135         struct sockaddr_in *sin = (struct sockaddr_in *) addr;
3136         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
3137
3138         if (cma_any_addr(addr)) {
3139                 memset(mgid, 0, sizeof *mgid);
3140         } else if ((addr->sa_family == AF_INET6) &&
3141                    ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
3142                                                                  0xFF10A01B)) {
3143                 /* IPv6 address is an SA assigned MGID. */
3144                 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3145         } else if (addr->sa_family == AF_IB) {
3146                 memcpy(mgid, &((struct sockaddr_ib *) addr)->sib_addr, sizeof *mgid);
3147         } else if ((addr->sa_family == AF_INET6)) {
3148                 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
3149                 if (id_priv->id.ps == RDMA_PS_UDP)
3150                         mc_map[7] = 0x01;       /* Use RDMA CM signature */
3151                 *mgid = *(union ib_gid *) (mc_map + 4);
3152         } else {
3153                 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
3154                 if (id_priv->id.ps == RDMA_PS_UDP)
3155                         mc_map[7] = 0x01;       /* Use RDMA CM signature */
3156                 *mgid = *(union ib_gid *) (mc_map + 4);
3157         }
3158 }
3159
3160 static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
3161                                  struct cma_multicast *mc)
3162 {
3163         struct ib_sa_mcmember_rec rec;
3164         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3165         ib_sa_comp_mask comp_mask;
3166         int ret;
3167
3168         ib_addr_get_mgid(dev_addr, &rec.mgid);
3169         ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
3170                                      &rec.mgid, &rec);
3171         if (ret)
3172                 return ret;
3173
3174         ret = cma_set_qkey(id_priv, 0);
3175         if (ret)
3176                 return ret;
3177
3178         cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
3179         rec.qkey = cpu_to_be32(id_priv->qkey);
3180         rdma_addr_get_sgid(dev_addr, &rec.port_gid);
3181         rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
3182         rec.join_state = 1;
3183
3184         comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
3185                     IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
3186                     IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
3187                     IB_SA_MCMEMBER_REC_FLOW_LABEL |
3188                     IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
3189
3190         if (id_priv->id.ps == RDMA_PS_IPOIB)
3191                 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
3192                              IB_SA_MCMEMBER_REC_RATE_SELECTOR |
3193                              IB_SA_MCMEMBER_REC_MTU_SELECTOR |
3194                              IB_SA_MCMEMBER_REC_MTU |
3195                              IB_SA_MCMEMBER_REC_HOP_LIMIT;
3196
3197         mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
3198                                                 id_priv->id.port_num, &rec,
3199                                                 comp_mask, GFP_KERNEL,
3200                                                 cma_ib_mc_handler, mc);
3201         return PTR_ERR_OR_ZERO(mc->multicast.ib);
3202 }
3203
3204 static void iboe_mcast_work_handler(struct work_struct *work)
3205 {
3206         struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
3207         struct cma_multicast *mc = mw->mc;
3208         struct ib_sa_multicast *m = mc->multicast.ib;
3209
3210         mc->multicast.ib->context = mc;
3211         cma_ib_mc_handler(0, m);
3212         kref_put(&mc->mcref, release_mc);
3213         kfree(mw);
3214 }
3215
3216 static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid)
3217 {
3218         struct sockaddr_in *sin = (struct sockaddr_in *)addr;
3219         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
3220
3221         if (cma_any_addr(addr)) {
3222                 memset(mgid, 0, sizeof *mgid);
3223         } else if (addr->sa_family == AF_INET6) {
3224                 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3225         } else {
3226                 mgid->raw[0] = 0xff;
3227                 mgid->raw[1] = 0x0e;
3228                 mgid->raw[2] = 0;
3229                 mgid->raw[3] = 0;
3230                 mgid->raw[4] = 0;
3231                 mgid->raw[5] = 0;
3232                 mgid->raw[6] = 0;
3233                 mgid->raw[7] = 0;
3234                 mgid->raw[8] = 0;
3235                 mgid->raw[9] = 0;
3236                 mgid->raw[10] = 0xff;
3237                 mgid->raw[11] = 0xff;
3238                 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
3239         }
3240 }
3241
3242 static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
3243                                    struct cma_multicast *mc)
3244 {
3245         struct iboe_mcast_work *work;
3246         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3247         int err;
3248         struct sockaddr *addr = (struct sockaddr *)&mc->addr;
3249         struct net_device *ndev = NULL;
3250
3251         if (cma_zero_addr((struct sockaddr *)&mc->addr))
3252                 return -EINVAL;
3253
3254         work = kzalloc(sizeof *work, GFP_KERNEL);
3255         if (!work)
3256                 return -ENOMEM;
3257
3258         mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
3259         if (!mc->multicast.ib) {
3260                 err = -ENOMEM;
3261                 goto out1;
3262         }
3263
3264         cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid);
3265
3266         mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
3267         if (id_priv->id.ps == RDMA_PS_UDP)
3268                 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
3269
3270         if (dev_addr->bound_dev_if)
3271                 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
3272         if (!ndev) {
3273                 err = -ENODEV;
3274                 goto out2;
3275         }
3276         mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
3277         mc->multicast.ib->rec.hop_limit = 1;
3278         mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu);
3279         dev_put(ndev);
3280         if (!mc->multicast.ib->rec.mtu) {
3281                 err = -EINVAL;
3282                 goto out2;
3283         }
3284         iboe_addr_get_sgid(dev_addr, &mc->multicast.ib->rec.port_gid);
3285         work->id = id_priv;
3286         work->mc = mc;
3287         INIT_WORK(&work->work, iboe_mcast_work_handler);
3288         kref_get(&mc->mcref);
3289         queue_work(cma_wq, &work->work);
3290
3291         return 0;
3292
3293 out2:
3294         kfree(mc->multicast.ib);
3295 out1:
3296         kfree(work);
3297         return err;
3298 }
3299
3300 int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
3301                         void *context)
3302 {
3303         struct rdma_id_private *id_priv;
3304         struct cma_multicast *mc;
3305         int ret;
3306
3307         id_priv = container_of(id, struct rdma_id_private, id);
3308         if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) &&
3309             !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED))
3310                 return -EINVAL;
3311
3312         mc = kmalloc(sizeof *mc, GFP_KERNEL);
3313         if (!mc)
3314                 return -ENOMEM;
3315
3316         memcpy(&mc->addr, addr, rdma_addr_size(addr));
3317         mc->context = context;
3318         mc->id_priv = id_priv;
3319
3320         spin_lock(&id_priv->lock);
3321         list_add(&mc->list, &id_priv->mc_list);
3322         spin_unlock(&id_priv->lock);
3323
3324         switch (rdma_node_get_transport(id->device->node_type)) {
3325         case RDMA_TRANSPORT_IB:
3326                 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
3327                 case IB_LINK_LAYER_INFINIBAND:
3328                         ret = cma_join_ib_multicast(id_priv, mc);
3329                         break;
3330                 case IB_LINK_LAYER_ETHERNET:
3331                         kref_init(&mc->mcref);
3332                         ret = cma_iboe_join_multicast(id_priv, mc);
3333                         break;
3334                 default:
3335                         ret = -EINVAL;
3336                 }
3337                 break;
3338         default:
3339                 ret = -ENOSYS;
3340                 break;
3341         }
3342
3343         if (ret) {
3344                 spin_lock_irq(&id_priv->lock);
3345                 list_del(&mc->list);
3346                 spin_unlock_irq(&id_priv->lock);
3347                 kfree(mc);
3348         }
3349         return ret;
3350 }
3351 EXPORT_SYMBOL(rdma_join_multicast);
3352
3353 void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
3354 {
3355         struct rdma_id_private *id_priv;
3356         struct cma_multicast *mc;
3357
3358         id_priv = container_of(id, struct rdma_id_private, id);
3359         spin_lock_irq(&id_priv->lock);
3360         list_for_each_entry(mc, &id_priv->mc_list, list) {
3361                 if (!memcmp(&mc->addr, addr, rdma_addr_size(addr))) {
3362                         list_del(&mc->list);
3363                         spin_unlock_irq(&id_priv->lock);
3364
3365                         if (id->qp)
3366                                 ib_detach_mcast(id->qp,
3367                                                 &mc->multicast.ib->rec.mgid,
3368                                                 be16_to_cpu(mc->multicast.ib->rec.mlid));
3369                         if (rdma_node_get_transport(id_priv->cma_dev->device->node_type) == RDMA_TRANSPORT_IB) {
3370                                 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
3371                                 case IB_LINK_LAYER_INFINIBAND:
3372                                         ib_sa_free_multicast(mc->multicast.ib);
3373                                         kfree(mc);
3374                                         break;
3375                                 case IB_LINK_LAYER_ETHERNET:
3376                                         kref_put(&mc->mcref, release_mc);
3377                                         break;
3378                                 default:
3379                                         break;
3380                                 }
3381                         }
3382                         return;
3383                 }
3384         }
3385         spin_unlock_irq(&id_priv->lock);
3386 }
3387 EXPORT_SYMBOL(rdma_leave_multicast);
3388
3389 static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
3390 {
3391         struct rdma_dev_addr *dev_addr;
3392         struct cma_ndev_work *work;
3393
3394         dev_addr = &id_priv->id.route.addr.dev_addr;
3395
3396         if ((dev_addr->bound_dev_if == ndev->ifindex) &&
3397             memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
3398                 printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n",
3399                        ndev->name, &id_priv->id);
3400                 work = kzalloc(sizeof *work, GFP_KERNEL);
3401                 if (!work)
3402                         return -ENOMEM;
3403
3404                 INIT_WORK(&work->work, cma_ndev_work_handler);
3405                 work->id = id_priv;
3406                 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
3407                 atomic_inc(&id_priv->refcount);
3408                 queue_work(cma_wq, &work->work);
3409         }
3410
3411         return 0;
3412 }
3413
3414 static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
3415                                void *ptr)
3416 {
3417         struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
3418         struct cma_device *cma_dev;
3419         struct rdma_id_private *id_priv;
3420         int ret = NOTIFY_DONE;
3421
3422         if (dev_net(ndev) != &init_net)
3423                 return NOTIFY_DONE;
3424
3425         if (event != NETDEV_BONDING_FAILOVER)
3426                 return NOTIFY_DONE;
3427
3428         if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING))
3429                 return NOTIFY_DONE;
3430
3431         mutex_lock(&lock);
3432         list_for_each_entry(cma_dev, &dev_list, list)
3433                 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3434                         ret = cma_netdev_change(ndev, id_priv);
3435                         if (ret)
3436                                 goto out;
3437                 }
3438
3439 out:
3440         mutex_unlock(&lock);
3441         return ret;
3442 }
3443
3444 static struct notifier_block cma_nb = {
3445         .notifier_call = cma_netdev_callback
3446 };
3447
3448 static void cma_add_one(struct ib_device *device)
3449 {
3450         struct cma_device *cma_dev;
3451         struct rdma_id_private *id_priv;
3452
3453         cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
3454         if (!cma_dev)
3455                 return;
3456
3457         cma_dev->device = device;
3458
3459         init_completion(&cma_dev->comp);
3460         atomic_set(&cma_dev->refcount, 1);
3461         INIT_LIST_HEAD(&cma_dev->id_list);
3462         ib_set_client_data(device, &cma_client, cma_dev);
3463
3464         mutex_lock(&lock);
3465         list_add_tail(&cma_dev->list, &dev_list);
3466         list_for_each_entry(id_priv, &listen_any_list, list)
3467                 cma_listen_on_dev(id_priv, cma_dev);
3468         mutex_unlock(&lock);
3469 }
3470
3471 static int cma_remove_id_dev(struct rdma_id_private *id_priv)
3472 {
3473         struct rdma_cm_event event;
3474         enum rdma_cm_state state;
3475         int ret = 0;
3476
3477         /* Record that we want to remove the device */
3478         state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL);
3479         if (state == RDMA_CM_DESTROYING)
3480                 return 0;
3481
3482         cma_cancel_operation(id_priv, state);
3483         mutex_lock(&id_priv->handler_mutex);
3484
3485         /* Check for destruction from another callback. */
3486         if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL))
3487                 goto out;
3488
3489         memset(&event, 0, sizeof event);
3490         event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
3491         ret = id_priv->id.event_handler(&id_priv->id, &event);
3492 out:
3493         mutex_unlock(&id_priv->handler_mutex);
3494         return ret;
3495 }
3496
3497 static void cma_process_remove(struct cma_device *cma_dev)
3498 {
3499         struct rdma_id_private *id_priv;
3500         int ret;
3501
3502         mutex_lock(&lock);
3503         while (!list_empty(&cma_dev->id_list)) {
3504                 id_priv = list_entry(cma_dev->id_list.next,
3505                                      struct rdma_id_private, list);
3506
3507                 list_del(&id_priv->listen_list);
3508                 list_del_init(&id_priv->list);
3509                 atomic_inc(&id_priv->refcount);
3510                 mutex_unlock(&lock);
3511
3512                 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
3513                 cma_deref_id(id_priv);
3514                 if (ret)
3515                         rdma_destroy_id(&id_priv->id);
3516
3517                 mutex_lock(&lock);
3518         }
3519         mutex_unlock(&lock);
3520
3521         cma_deref_dev(cma_dev);
3522         wait_for_completion(&cma_dev->comp);
3523 }
3524
3525 static void cma_remove_one(struct ib_device *device)
3526 {
3527         struct cma_device *cma_dev;
3528
3529         cma_dev = ib_get_client_data(device, &cma_client);
3530         if (!cma_dev)
3531                 return;
3532
3533         mutex_lock(&lock);
3534         list_del(&cma_dev->list);
3535         mutex_unlock(&lock);
3536
3537         cma_process_remove(cma_dev);
3538         kfree(cma_dev);
3539 }
3540
3541 static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb)
3542 {
3543         struct nlmsghdr *nlh;
3544         struct rdma_cm_id_stats *id_stats;
3545         struct rdma_id_private *id_priv;
3546         struct rdma_cm_id *id = NULL;
3547         struct cma_device *cma_dev;
3548         int i_dev = 0, i_id = 0;
3549
3550         /*
3551          * We export all of the IDs as a sequence of messages.  Each
3552          * ID gets its own netlink message.
3553          */
3554         mutex_lock(&lock);
3555
3556         list_for_each_entry(cma_dev, &dev_list, list) {
3557                 if (i_dev < cb->args[0]) {
3558                         i_dev++;
3559                         continue;
3560                 }
3561
3562                 i_id = 0;
3563                 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3564                         if (i_id < cb->args[1]) {
3565                                 i_id++;
3566                                 continue;
3567                         }
3568
3569                         id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq,
3570                                                 sizeof *id_stats, RDMA_NL_RDMA_CM,
3571                                                 RDMA_NL_RDMA_CM_ID_STATS);
3572                         if (!id_stats)
3573                                 goto out;
3574
3575                         memset(id_stats, 0, sizeof *id_stats);
3576                         id = &id_priv->id;
3577                         id_stats->node_type = id->route.addr.dev_addr.dev_type;
3578                         id_stats->port_num = id->port_num;
3579                         id_stats->bound_dev_if =
3580                                 id->route.addr.dev_addr.bound_dev_if;
3581
3582                         if (ibnl_put_attr(skb, nlh,
3583                                           rdma_addr_size(cma_src_addr(id_priv)),
3584                                           cma_src_addr(id_priv),
3585                                           RDMA_NL_RDMA_CM_ATTR_SRC_ADDR))
3586                                 goto out;
3587                         if (ibnl_put_attr(skb, nlh,
3588                                           rdma_addr_size(cma_src_addr(id_priv)),
3589                                           cma_dst_addr(id_priv),
3590                                           RDMA_NL_RDMA_CM_ATTR_DST_ADDR))
3591                                 goto out;
3592
3593                         id_stats->pid           = id_priv->owner;
3594                         id_stats->port_space    = id->ps;
3595                         id_stats->cm_state      = id_priv->state;
3596                         id_stats->qp_num        = id_priv->qp_num;
3597                         id_stats->qp_type       = id->qp_type;
3598
3599                         i_id++;
3600                 }
3601
3602                 cb->args[1] = 0;
3603                 i_dev++;
3604         }
3605
3606 out:
3607         mutex_unlock(&lock);
3608         cb->args[0] = i_dev;
3609         cb->args[1] = i_id;
3610
3611         return skb->len;
3612 }
3613
3614 static const struct ibnl_client_cbs cma_cb_table[] = {
3615         [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats,
3616                                        .module = THIS_MODULE },
3617 };
3618
3619 static int __init cma_init(void)
3620 {
3621         int ret;
3622
3623         cma_wq = create_singlethread_workqueue("rdma_cm");
3624         if (!cma_wq)
3625                 return -ENOMEM;
3626
3627         ib_sa_register_client(&sa_client);
3628         rdma_addr_register_client(&addr_client);
3629         register_netdevice_notifier(&cma_nb);
3630
3631         ret = ib_register_client(&cma_client);
3632         if (ret)
3633                 goto err;
3634
3635         if (ibnl_add_client(RDMA_NL_RDMA_CM, RDMA_NL_RDMA_CM_NUM_OPS, cma_cb_table))
3636                 printk(KERN_WARNING "RDMA CMA: failed to add netlink callback\n");
3637
3638         return 0;
3639
3640 err:
3641         unregister_netdevice_notifier(&cma_nb);
3642         rdma_addr_unregister_client(&addr_client);
3643         ib_sa_unregister_client(&sa_client);
3644         destroy_workqueue(cma_wq);
3645         return ret;
3646 }
3647
3648 static void __exit cma_cleanup(void)
3649 {
3650         ibnl_remove_client(RDMA_NL_RDMA_CM);
3651         ib_unregister_client(&cma_client);
3652         unregister_netdevice_notifier(&cma_nb);
3653         rdma_addr_unregister_client(&addr_client);
3654         ib_sa_unregister_client(&sa_client);
3655         destroy_workqueue(cma_wq);
3656         idr_destroy(&tcp_ps);
3657         idr_destroy(&udp_ps);
3658         idr_destroy(&ipoib_ps);
3659         idr_destroy(&ib_ps);
3660 }
3661
3662 module_init(cma_init);
3663 module_exit(cma_cleanup);