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 const char * const cma_events[] = {
  69         [RDMA_CM_EVENT_ADDR_RESOLVED]    = "address resolved",
  70         [RDMA_CM_EVENT_ADDR_ERROR]       = "address error",
  71         [RDMA_CM_EVENT_ROUTE_RESOLVED]   = "route resolved ",
  72         [RDMA_CM_EVENT_ROUTE_ERROR]      = "route error",
  73         [RDMA_CM_EVENT_CONNECT_REQUEST]  = "connect request",
  74         [RDMA_CM_EVENT_CONNECT_RESPONSE] = "connect response",
  75         [RDMA_CM_EVENT_CONNECT_ERROR]    = "connect error",
  76         [RDMA_CM_EVENT_UNREACHABLE]      = "unreachable",
  77         [RDMA_CM_EVENT_REJECTED]         = "rejected",
  78         [RDMA_CM_EVENT_ESTABLISHED]      = "established",
  79         [RDMA_CM_EVENT_DISCONNECTED]     = "disconnected",
  80         [RDMA_CM_EVENT_DEVICE_REMOVAL]   = "device removal",
  81         [RDMA_CM_EVENT_MULTICAST_JOIN]   = "multicast join",
  82         [RDMA_CM_EVENT_MULTICAST_ERROR]  = "multicast error",
  83         [RDMA_CM_EVENT_ADDR_CHANGE]      = "address change",
  84         [RDMA_CM_EVENT_TIMEWAIT_EXIT]    = "timewait exit",
  85 };
  86
  87 const char *rdma_event_msg(enum rdma_cm_event_type event)
  88 {
  89         size_t index = event;
  90
  91         return (index < ARRAY_SIZE(cma_events) && cma_events[index]) ?
  92                         cma_events[index] : "unrecognized event";
  93 }
  94 EXPORT_SYMBOL(rdma_event_msg);
  95
  96 static void cma_add_one(struct ib_device *device);
  97 static void cma_remove_one(struct ib_device *device);
  98
  99 static struct ib_client cma_client = {
 100         .name   = "cma",
 101         .add    = cma_add_one,
 102         .remove = cma_remove_one
 103 };
 104
 105 static struct ib_sa_client sa_client;
 106 static struct rdma_addr_client addr_client;
 107 static LIST_HEAD(dev_list);
 108 static LIST_HEAD(listen_any_list);
 109 static DEFINE_MUTEX(lock);
 110 static struct workqueue_struct *cma_wq;
 111 static DEFINE_IDR(tcp_ps);
 112 static DEFINE_IDR(udp_ps);
 113 static DEFINE_IDR(ipoib_ps);
 114 static DEFINE_IDR(ib_ps);
 115
 116 struct cma_device {
 117         struct list_head        list;
 118         struct ib_device        *device;
 119         struct completion       comp;
 120         atomic_t                refcount;
 121         struct list_head        id_list;
 122 };
 123
 124 struct rdma_bind_list {
 125         struct idr              *ps;
 126         struct hlist_head       owners;
 127         unsigned short          port;
 128 };
 129
 130 enum {
 131         CMA_OPTION_AFONLY,
 132 };
 133
 134 /*
 135  * Device removal can occur at anytime, so we need extra handling to
 136  * serialize notifying the user of device removal with other callbacks.
 137  * We do this by disabling removal notification while a callback is in process,
 138  * and reporting it after the callback completes.
 139  */
 140 struct rdma_id_private {
 141         struct rdma_cm_id       id;
 142
 143         struct rdma_bind_list   *bind_list;
 144         struct hlist_node       node;
 145         struct list_head        list; /* listen_any_list or cma_device.list */
 146         struct list_head        listen_list; /* per device listens */
 147         struct cma_device       *cma_dev;
 148         struct list_head        mc_list;
 149
 150         int                     internal_id;
 151         enum rdma_cm_state      state;
 152         spinlock_t              lock;
 153         struct mutex            qp_mutex;
 154
 155         struct completion       comp;
 156         atomic_t                refcount;
 157         struct mutex            handler_mutex;
 158
 159         int                     backlog;
 160         int                     timeout_ms;
 161         struct ib_sa_query      *query;
 162         int                     query_id;
 163         union {
 164                 struct ib_cm_id *ib;
 165                 struct iw_cm_id *iw;
 166         } cm_id;
 167
 168         u32                     seq_num;
 169         u32                     qkey;
 170         u32                     qp_num;
 171         pid_t                   owner;
 172         u32                     options;
 173         u8                      srq;
 174         u8                      tos;
 175         u8                      reuseaddr;
 176         u8                      afonly;
 177 };
 178
 179 struct cma_multicast {
 180         struct rdma_id_private *id_priv;
 181         union {
 182                 struct ib_sa_multicast *ib;
 183         } multicast;
 184         struct list_head        list;
 185         void                    *context;
 186         struct sockaddr_storage addr;
 187         struct kref             mcref;
 188 };
 189
 190 struct cma_work {
 191         struct work_struct      work;
 192         struct rdma_id_private  *id;
 193         enum rdma_cm_state      old_state;
 194         enum rdma_cm_state      new_state;
 195         struct rdma_cm_event    event;
 196 };
 197
 198 struct cma_ndev_work {
 199         struct work_struct      work;
 200         struct rdma_id_private  *id;
 201         struct rdma_cm_event    event;
 202 };
 203
 204 struct iboe_mcast_work {
 205         struct work_struct       work;
 206         struct rdma_id_private  *id;
 207         struct cma_multicast    *mc;
 208 };
 209
 210 union cma_ip_addr {
 211         struct in6_addr ip6;
 212         struct {
 213                 __be32 pad[3];
 214                 __be32 addr;
 215         } ip4;
 216 };
 217
 218 struct cma_hdr {
 219         u8 cma_version;
 220         u8 ip_version;  /* IP version: 7:4 */
 221         __be16 port;
 222         union cma_ip_addr src_addr;
 223         union cma_ip_addr dst_addr;
 224 };
 225
 226 #define CMA_VERSION 0x00
 227
 228 static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp)
 229 {
 230         unsigned long flags;
 231         int ret;
 232
 233         spin_lock_irqsave(&id_priv->lock, flags);
 234         ret = (id_priv->state == comp);
 235         spin_unlock_irqrestore(&id_priv->lock, flags);
 236         return ret;
 237 }
 238
 239 static int cma_comp_exch(struct rdma_id_private *id_priv,
 240                          enum rdma_cm_state comp, enum rdma_cm_state exch)
 241 {
 242         unsigned long flags;
 243         int ret;
 244
 245         spin_lock_irqsave(&id_priv->lock, flags);
 246         if ((ret = (id_priv->state == comp)))
 247                 id_priv->state = exch;
 248         spin_unlock_irqrestore(&id_priv->lock, flags);
 249         return ret;
 250 }
 251
 252 static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv,
 253                                    enum rdma_cm_state exch)
 254 {
 255         unsigned long flags;
 256         enum rdma_cm_state old;
 257
 258         spin_lock_irqsave(&id_priv->lock, flags);
 259         old = id_priv->state;
 260         id_priv->state = exch;
 261         spin_unlock_irqrestore(&id_priv->lock, flags);
 262         return old;
 263 }
 264
 265 static inline u8 cma_get_ip_ver(struct cma_hdr *hdr)
 266 {
 267         return hdr->ip_version >> 4;
 268 }
 269
 270 static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
 271 {
 272         hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
 273 }
 274
 275 static void cma_attach_to_dev(struct rdma_id_private *id_priv,
 276                               struct cma_device *cma_dev)
 277 {
 278         atomic_inc(&cma_dev->refcount);
 279         id_priv->cma_dev = cma_dev;
 280         id_priv->id.device = cma_dev->device;
 281         id_priv->id.route.addr.dev_addr.transport =
 282                 rdma_node_get_transport(cma_dev->device->node_type);
 283         list_add_tail(&id_priv->list, &cma_dev->id_list);
 284 }
 285
 286 static inline void cma_deref_dev(struct cma_device *cma_dev)
 287 {
 288         if (atomic_dec_and_test(&cma_dev->refcount))
 289                 complete(&cma_dev->comp);
 290 }
 291
 292 static inline void release_mc(struct kref *kref)
 293 {
 294         struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);
 295
 296         kfree(mc->multicast.ib);
 297         kfree(mc);
 298 }
 299
 300 static void cma_release_dev(struct rdma_id_private *id_priv)
 301 {
 302         mutex_lock(&lock);
 303         list_del(&id_priv->list);
 304         cma_deref_dev(id_priv->cma_dev);
 305         id_priv->cma_dev = NULL;
 306         mutex_unlock(&lock);
 307 }
 308
 309 static inline struct sockaddr *cma_src_addr(struct rdma_id_private *id_priv)
 310 {
 311         return (struct sockaddr *) &id_priv->id.route.addr.src_addr;
 312 }
 313
 314 static inline struct sockaddr *cma_dst_addr(struct rdma_id_private *id_priv)
 315 {
 316         return (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
 317 }
 318
 319 static inline unsigned short cma_family(struct rdma_id_private *id_priv)
 320 {
 321         return id_priv->id.route.addr.src_addr.ss_family;
 322 }
 323
 324 static int cma_set_qkey(struct rdma_id_private *id_priv, u32 qkey)
 325 {
 326         struct ib_sa_mcmember_rec rec;
 327         int ret = 0;
 328
 329         if (id_priv->qkey) {
 330                 if (qkey && id_priv->qkey != qkey)
 331                         return -EINVAL;
 332                 return 0;
 333         }
 334
 335         if (qkey) {
 336                 id_priv->qkey = qkey;
 337                 return 0;
 338         }
 339
 340         switch (id_priv->id.ps) {
 341         case RDMA_PS_UDP:
 342         case RDMA_PS_IB:
 343                 id_priv->qkey = RDMA_UDP_QKEY;
 344                 break;
 345         case RDMA_PS_IPOIB:
 346                 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
 347                 ret = ib_sa_get_mcmember_rec(id_priv->id.device,
 348                                              id_priv->id.port_num, &rec.mgid,
 349                                              &rec);
 350                 if (!ret)
 351                         id_priv->qkey = be32_to_cpu(rec.qkey);
 352                 break;
 353         default:
 354                 break;
 355         }
 356         return ret;
 357 }
 358
 359 static void cma_translate_ib(struct sockaddr_ib *sib, struct rdma_dev_addr *dev_addr)
 360 {
 361         dev_addr->dev_type = ARPHRD_INFINIBAND;
 362         rdma_addr_set_sgid(dev_addr, (union ib_gid *) &sib->sib_addr);
 363         ib_addr_set_pkey(dev_addr, ntohs(sib->sib_pkey));
 364 }
 365
 366 static int cma_translate_addr(struct sockaddr *addr, struct rdma_dev_addr *dev_addr)
 367 {
 368         int ret;
 369
 370         if (addr->sa_family != AF_IB) {
 371                 ret = rdma_translate_ip(addr, dev_addr, NULL);
 372         } else {
 373                 cma_translate_ib((struct sockaddr_ib *) addr, dev_addr);
 374                 ret = 0;
 375         }
 376
 377         return ret;
 378 }
 379
 380 static inline int cma_validate_port(struct ib_device *device, u8 port,
 381                                       union ib_gid *gid, int dev_type)
 382 {
 383         u8 found_port;
 384         int ret = -ENODEV;
 385
 386         if ((dev_type == ARPHRD_INFINIBAND) && !rdma_protocol_ib(device, port))
 387                 return ret;
 388
 389         if ((dev_type != ARPHRD_INFINIBAND) && rdma_protocol_ib(device, port))
 390                 return ret;
 391
 392         ret = ib_find_cached_gid(device, gid, &found_port, NULL);
 393         if (port != found_port)
 394                 return -ENODEV;
 395
 396         return ret;
 397 }
 398
 399 static int cma_acquire_dev(struct rdma_id_private *id_priv,
 400                            struct rdma_id_private *listen_id_priv)
 401 {
 402         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
 403         struct cma_device *cma_dev;
 404         union ib_gid gid, iboe_gid, *gidp;
 405         int ret = -ENODEV;
 406         u8 port;
 407
 408         if (dev_addr->dev_type != ARPHRD_INFINIBAND &&
 409             id_priv->id.ps == RDMA_PS_IPOIB)
 410                 return -EINVAL;
 411
 412         mutex_lock(&lock);
 413         rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
 414                     &iboe_gid);
 415
 416         memcpy(&gid, dev_addr->src_dev_addr +
 417                rdma_addr_gid_offset(dev_addr), sizeof gid);
 418
 419         if (listen_id_priv) {
 420                 cma_dev = listen_id_priv->cma_dev;
 421                 port = listen_id_priv->id.port_num;
 422                 gidp = rdma_protocol_roce(cma_dev->device, port) ?
 423                        &iboe_gid : &gid;
 424
 425                 ret = cma_validate_port(cma_dev->device, port, gidp,
 426                                         dev_addr->dev_type);
 427                 if (!ret) {
 428                         id_priv->id.port_num = port;
 429                         goto out;
 430                 }
 431         }
 432
 433         list_for_each_entry(cma_dev, &dev_list, list) {
 434                 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
 435                         if (listen_id_priv &&
 436                             listen_id_priv->cma_dev == cma_dev &&
 437                             listen_id_priv->id.port_num == port)
 438                                 continue;
 439
 440                         gidp = rdma_protocol_roce(cma_dev->device, port) ?
 441                                &iboe_gid : &gid;
 442
 443                         ret = cma_validate_port(cma_dev->device, port, gidp,
 444                                                 dev_addr->dev_type);
 445                         if (!ret) {
 446                                 id_priv->id.port_num = port;
 447                                 goto out;
 448                         }
 449                 }
 450         }
 451
 452 out:
 453         if (!ret)
 454                 cma_attach_to_dev(id_priv, cma_dev);
 455
 456         mutex_unlock(&lock);
 457         return ret;
 458 }
 459
 460 /*
 461  * Select the source IB device and address to reach the destination IB address.
 462  */
 463 static int cma_resolve_ib_dev(struct rdma_id_private *id_priv)
 464 {
 465         struct cma_device *cma_dev, *cur_dev;
 466         struct sockaddr_ib *addr;
 467         union ib_gid gid, sgid, *dgid;
 468         u16 pkey, index;
 469         u8 p;
 470         int i;
 471
 472         cma_dev = NULL;
 473         addr = (struct sockaddr_ib *) cma_dst_addr(id_priv);
 474         dgid = (union ib_gid *) &addr->sib_addr;
 475         pkey = ntohs(addr->sib_pkey);
 476
 477         list_for_each_entry(cur_dev, &dev_list, list) {
 478                 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
 479                         if (!rdma_cap_af_ib(cur_dev->device, p))
 480                                 continue;
 481
 482                         if (ib_find_cached_pkey(cur_dev->device, p, pkey, &index))
 483                                 continue;
 484
 485                         for (i = 0; !ib_get_cached_gid(cur_dev->device, p, i, &gid); i++) {
 486                                 if (!memcmp(&gid, dgid, sizeof(gid))) {
 487                                         cma_dev = cur_dev;
 488                                         sgid = gid;
 489                                         id_priv->id.port_num = p;
 490                                         goto found;
 491                                 }
 492
 493                                 if (!cma_dev && (gid.global.subnet_prefix ==
 494                                                  dgid->global.subnet_prefix)) {
 495                                         cma_dev = cur_dev;
 496                                         sgid = gid;
 497                                         id_priv->id.port_num = p;
 498                                 }
 499                         }
 500                 }
 501         }
 502
 503         if (!cma_dev)
 504                 return -ENODEV;
 505
 506 found:
 507         cma_attach_to_dev(id_priv, cma_dev);
 508         addr = (struct sockaddr_ib *) cma_src_addr(id_priv);
 509         memcpy(&addr->sib_addr, &sgid, sizeof sgid);
 510         cma_translate_ib(addr, &id_priv->id.route.addr.dev_addr);
 511         return 0;
 512 }
 513
 514 static void cma_deref_id(struct rdma_id_private *id_priv)
 515 {
 516         if (atomic_dec_and_test(&id_priv->refcount))
 517                 complete(&id_priv->comp);
 518 }
 519
 520 static int cma_disable_callback(struct rdma_id_private *id_priv,
 521                                 enum rdma_cm_state state)
 522 {
 523         mutex_lock(&id_priv->handler_mutex);
 524         if (id_priv->state != state) {
 525                 mutex_unlock(&id_priv->handler_mutex);
 526                 return -EINVAL;
 527         }
 528         return 0;
 529 }
 530
 531 struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
 532                                   void *context, enum rdma_port_space ps,
 533                                   enum ib_qp_type qp_type)
 534 {
 535         struct rdma_id_private *id_priv;
 536
 537         id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
 538         if (!id_priv)
 539                 return ERR_PTR(-ENOMEM);
 540
 541         id_priv->owner = task_pid_nr(current);
 542         id_priv->state = RDMA_CM_IDLE;
 543         id_priv->id.context = context;
 544         id_priv->id.event_handler = event_handler;
 545         id_priv->id.ps = ps;
 546         id_priv->id.qp_type = qp_type;
 547         spin_lock_init(&id_priv->lock);
 548         mutex_init(&id_priv->qp_mutex);
 549         init_completion(&id_priv->comp);
 550         atomic_set(&id_priv->refcount, 1);
 551         mutex_init(&id_priv->handler_mutex);
 552         INIT_LIST_HEAD(&id_priv->listen_list);
 553         INIT_LIST_HEAD(&id_priv->mc_list);
 554         get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
 555
 556         return &id_priv->id;
 557 }
 558 EXPORT_SYMBOL(rdma_create_id);
 559
 560 static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
 561 {
 562         struct ib_qp_attr qp_attr;
 563         int qp_attr_mask, ret;
 564
 565         qp_attr.qp_state = IB_QPS_INIT;
 566         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 567         if (ret)
 568                 return ret;
 569
 570         ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
 571         if (ret)
 572                 return ret;
 573
 574         qp_attr.qp_state = IB_QPS_RTR;
 575         ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
 576         if (ret)
 577                 return ret;
 578
 579         qp_attr.qp_state = IB_QPS_RTS;
 580         qp_attr.sq_psn = 0;
 581         ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
 582
 583         return ret;
 584 }
 585
 586 static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
 587 {
 588         struct ib_qp_attr qp_attr;
 589         int qp_attr_mask, ret;
 590
 591         qp_attr.qp_state = IB_QPS_INIT;
 592         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 593         if (ret)
 594                 return ret;
 595
 596         return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
 597 }
 598
 599 int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
 600                    struct ib_qp_init_attr *qp_init_attr)
 601 {
 602         struct rdma_id_private *id_priv;
 603         struct ib_qp *qp;
 604         int ret;
 605
 606         id_priv = container_of(id, struct rdma_id_private, id);
 607         if (id->device != pd->device)
 608                 return -EINVAL;
 609
 610         qp = ib_create_qp(pd, qp_init_attr);
 611         if (IS_ERR(qp))
 612                 return PTR_ERR(qp);
 613
 614         if (id->qp_type == IB_QPT_UD)
 615                 ret = cma_init_ud_qp(id_priv, qp);
 616         else
 617                 ret = cma_init_conn_qp(id_priv, qp);
 618         if (ret)
 619                 goto err;
 620
 621         id->qp = qp;
 622         id_priv->qp_num = qp->qp_num;
 623         id_priv->srq = (qp->srq != NULL);
 624         return 0;
 625 err:
 626         ib_destroy_qp(qp);
 627         return ret;
 628 }
 629 EXPORT_SYMBOL(rdma_create_qp);
 630
 631 void rdma_destroy_qp(struct rdma_cm_id *id)
 632 {
 633         struct rdma_id_private *id_priv;
 634
 635         id_priv = container_of(id, struct rdma_id_private, id);
 636         mutex_lock(&id_priv->qp_mutex);
 637         ib_destroy_qp(id_priv->id.qp);
 638         id_priv->id.qp = NULL;
 639         mutex_unlock(&id_priv->qp_mutex);
 640 }
 641 EXPORT_SYMBOL(rdma_destroy_qp);
 642
 643 static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
 644                              struct rdma_conn_param *conn_param)
 645 {
 646         struct ib_qp_attr qp_attr;
 647         int qp_attr_mask, ret;
 648         union ib_gid sgid;
 649
 650         mutex_lock(&id_priv->qp_mutex);
 651         if (!id_priv->id.qp) {
 652                 ret = 0;
 653                 goto out;
 654         }
 655
 656         /* Need to update QP attributes from default values. */
 657         qp_attr.qp_state = IB_QPS_INIT;
 658         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 659         if (ret)
 660                 goto out;
 661
 662         ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
 663         if (ret)
 664                 goto out;
 665
 666         qp_attr.qp_state = IB_QPS_RTR;
 667         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 668         if (ret)
 669                 goto out;
 670
 671         ret = ib_query_gid(id_priv->id.device, id_priv->id.port_num,
 672                            qp_attr.ah_attr.grh.sgid_index, &sgid);
 673         if (ret)
 674                 goto out;
 675
 676         BUG_ON(id_priv->cma_dev->device != id_priv->id.device);
 677
 678         if (rdma_protocol_roce(id_priv->id.device, id_priv->id.port_num)) {
 679                 ret = rdma_addr_find_smac_by_sgid(&sgid, qp_attr.smac, NULL);
 680
 681                 if (ret)
 682                         goto out;
 683         }
 684         if (conn_param)
 685                 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
 686         ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
 687 out:
 688         mutex_unlock(&id_priv->qp_mutex);
 689         return ret;
 690 }
 691
 692 static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
 693                              struct rdma_conn_param *conn_param)
 694 {
 695         struct ib_qp_attr qp_attr;
 696         int qp_attr_mask, ret;
 697
 698         mutex_lock(&id_priv->qp_mutex);
 699         if (!id_priv->id.qp) {
 700                 ret = 0;
 701                 goto out;
 702         }
 703
 704         qp_attr.qp_state = IB_QPS_RTS;
 705         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 706         if (ret)
 707                 goto out;
 708
 709         if (conn_param)
 710                 qp_attr.max_rd_atomic = conn_param->initiator_depth;
 711         ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
 712 out:
 713         mutex_unlock(&id_priv->qp_mutex);
 714         return ret;
 715 }
 716
 717 static int cma_modify_qp_err(struct rdma_id_private *id_priv)
 718 {
 719         struct ib_qp_attr qp_attr;
 720         int ret;
 721
 722         mutex_lock(&id_priv->qp_mutex);
 723         if (!id_priv->id.qp) {
 724                 ret = 0;
 725                 goto out;
 726         }
 727
 728         qp_attr.qp_state = IB_QPS_ERR;
 729         ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
 730 out:
 731         mutex_unlock(&id_priv->qp_mutex);
 732         return ret;
 733 }
 734
 735 static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
 736                                struct ib_qp_attr *qp_attr, int *qp_attr_mask)
 737 {
 738         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
 739         int ret;
 740         u16 pkey;
 741
 742         if (rdma_cap_eth_ah(id_priv->id.device, id_priv->id.port_num))
 743                 pkey = 0xffff;
 744         else
 745                 pkey = ib_addr_get_pkey(dev_addr);
 746
 747         ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
 748                                   pkey, &qp_attr->pkey_index);
 749         if (ret)
 750                 return ret;
 751
 752         qp_attr->port_num = id_priv->id.port_num;
 753         *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
 754
 755         if (id_priv->id.qp_type == IB_QPT_UD) {
 756                 ret = cma_set_qkey(id_priv, 0);
 757                 if (ret)
 758                         return ret;
 759
 760                 qp_attr->qkey = id_priv->qkey;
 761                 *qp_attr_mask |= IB_QP_QKEY;
 762         } else {
 763                 qp_attr->qp_access_flags = 0;
 764                 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
 765         }
 766         return 0;
 767 }
 768
 769 int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
 770                        int *qp_attr_mask)
 771 {
 772         struct rdma_id_private *id_priv;
 773         int ret = 0;
 774
 775         id_priv = container_of(id, struct rdma_id_private, id);
 776         if (rdma_cap_ib_cm(id->device, id->port_num)) {
 777                 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD))
 778                         ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
 779                 else
 780                         ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
 781                                                  qp_attr_mask);
 782
 783                 if (qp_attr->qp_state == IB_QPS_RTR)
 784                         qp_attr->rq_psn = id_priv->seq_num;
 785         } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
 786                 if (!id_priv->cm_id.iw) {
 787                         qp_attr->qp_access_flags = 0;
 788                         *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
 789                 } else
 790                         ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
 791                                                  qp_attr_mask);
 792         } else
 793                 ret = -ENOSYS;
 794
 795         return ret;
 796 }
 797 EXPORT_SYMBOL(rdma_init_qp_attr);
 798
 799 static inline int cma_zero_addr(struct sockaddr *addr)
 800 {
 801         switch (addr->sa_family) {
 802         case AF_INET:
 803                 return ipv4_is_zeronet(((struct sockaddr_in *)addr)->sin_addr.s_addr);
 804         case AF_INET6:
 805                 return ipv6_addr_any(&((struct sockaddr_in6 *) addr)->sin6_addr);
 806         case AF_IB:
 807                 return ib_addr_any(&((struct sockaddr_ib *) addr)->sib_addr);
 808         default:
 809                 return 0;
 810         }
 811 }
 812
 813 static inline int cma_loopback_addr(struct sockaddr *addr)
 814 {
 815         switch (addr->sa_family) {
 816         case AF_INET:
 817                 return ipv4_is_loopback(((struct sockaddr_in *) addr)->sin_addr.s_addr);
 818         case AF_INET6:
 819                 return ipv6_addr_loopback(&((struct sockaddr_in6 *) addr)->sin6_addr);
 820         case AF_IB:
 821                 return ib_addr_loopback(&((struct sockaddr_ib *) addr)->sib_addr);
 822         default:
 823                 return 0;
 824         }
 825 }
 826
 827 static inline int cma_any_addr(struct sockaddr *addr)
 828 {
 829         return cma_zero_addr(addr) || cma_loopback_addr(addr);
 830 }
 831
 832 static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst)
 833 {
 834         if (src->sa_family != dst->sa_family)
 835                 return -1;
 836
 837         switch (src->sa_family) {
 838         case AF_INET:
 839                 return ((struct sockaddr_in *) src)->sin_addr.s_addr !=
 840                        ((struct sockaddr_in *) dst)->sin_addr.s_addr;
 841         case AF_INET6:
 842                 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr,
 843                                      &((struct sockaddr_in6 *) dst)->sin6_addr);
 844         default:
 845                 return ib_addr_cmp(&((struct sockaddr_ib *) src)->sib_addr,
 846                                    &((struct sockaddr_ib *) dst)->sib_addr);
 847         }
 848 }
 849
 850 static __be16 cma_port(struct sockaddr *addr)
 851 {
 852         struct sockaddr_ib *sib;
 853
 854         switch (addr->sa_family) {
 855         case AF_INET:
 856                 return ((struct sockaddr_in *) addr)->sin_port;
 857         case AF_INET6:
 858                 return ((struct sockaddr_in6 *) addr)->sin6_port;
 859         case AF_IB:
 860                 sib = (struct sockaddr_ib *) addr;
 861                 return htons((u16) (be64_to_cpu(sib->sib_sid) &
 862                                     be64_to_cpu(sib->sib_sid_mask)));
 863         default:
 864                 return 0;
 865         }
 866 }
 867
 868 static inline int cma_any_port(struct sockaddr *addr)
 869 {
 870         return !cma_port(addr);
 871 }
 872
 873 static void cma_save_ib_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id,
 874                              struct ib_sa_path_rec *path)
 875 {
 876         struct sockaddr_ib *listen_ib, *ib;
 877
 878         listen_ib = (struct sockaddr_ib *) &listen_id->route.addr.src_addr;
 879         ib = (struct sockaddr_ib *) &id->route.addr.src_addr;
 880         ib->sib_family = listen_ib->sib_family;
 881         if (path) {
 882                 ib->sib_pkey = path->pkey;
 883                 ib->sib_flowinfo = path->flow_label;
 884                 memcpy(&ib->sib_addr, &path->sgid, 16);
 885         } else {
 886                 ib->sib_pkey = listen_ib->sib_pkey;
 887                 ib->sib_flowinfo = listen_ib->sib_flowinfo;
 888                 ib->sib_addr = listen_ib->sib_addr;
 889         }
 890         ib->sib_sid = listen_ib->sib_sid;
 891         ib->sib_sid_mask = cpu_to_be64(0xffffffffffffffffULL);
 892         ib->sib_scope_id = listen_ib->sib_scope_id;
 893
 894         if (path) {
 895                 ib = (struct sockaddr_ib *) &id->route.addr.dst_addr;
 896                 ib->sib_family = listen_ib->sib_family;
 897                 ib->sib_pkey = path->pkey;
 898                 ib->sib_flowinfo = path->flow_label;
 899                 memcpy(&ib->sib_addr, &path->dgid, 16);
 900         }
 901 }
 902
 903 static __be16 ss_get_port(const struct sockaddr_storage *ss)
 904 {
 905         if (ss->ss_family == AF_INET)
 906                 return ((struct sockaddr_in *)ss)->sin_port;
 907         else if (ss->ss_family == AF_INET6)
 908                 return ((struct sockaddr_in6 *)ss)->sin6_port;
 909         BUG();
 910 }
 911
 912 static void cma_save_ip4_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id,
 913                               struct cma_hdr *hdr)
 914 {
 915         struct sockaddr_in *ip4;
 916
 917         ip4 = (struct sockaddr_in *) &id->route.addr.src_addr;
 918         ip4->sin_family = AF_INET;
 919         ip4->sin_addr.s_addr = hdr->dst_addr.ip4.addr;
 920         ip4->sin_port = ss_get_port(&listen_id->route.addr.src_addr);
 921
 922         ip4 = (struct sockaddr_in *) &id->route.addr.dst_addr;
 923         ip4->sin_family = AF_INET;
 924         ip4->sin_addr.s_addr = hdr->src_addr.ip4.addr;
 925         ip4->sin_port = hdr->port;
 926 }
 927
 928 static void cma_save_ip6_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id,
 929                               struct cma_hdr *hdr)
 930 {
 931         struct sockaddr_in6 *ip6;
 932
 933         ip6 = (struct sockaddr_in6 *) &id->route.addr.src_addr;
 934         ip6->sin6_family = AF_INET6;
 935         ip6->sin6_addr = hdr->dst_addr.ip6;
 936         ip6->sin6_port = ss_get_port(&listen_id->route.addr.src_addr);
 937
 938         ip6 = (struct sockaddr_in6 *) &id->route.addr.dst_addr;
 939         ip6->sin6_family = AF_INET6;
 940         ip6->sin6_addr = hdr->src_addr.ip6;
 941         ip6->sin6_port = hdr->port;
 942 }
 943
 944 static int cma_save_net_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id,
 945                              struct ib_cm_event *ib_event)
 946 {
 947         struct cma_hdr *hdr;
 948
 949         if (listen_id->route.addr.src_addr.ss_family == AF_IB) {
 950                 if (ib_event->event == IB_CM_REQ_RECEIVED)
 951                         cma_save_ib_info(id, listen_id, ib_event->param.req_rcvd.primary_path);
 952                 else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED)
 953                         cma_save_ib_info(id, listen_id, NULL);
 954                 return 0;
 955         }
 956
 957         hdr = ib_event->private_data;
 958         if (hdr->cma_version != CMA_VERSION)
 959                 return -EINVAL;
 960
 961         switch (cma_get_ip_ver(hdr)) {
 962         case 4:
 963                 cma_save_ip4_info(id, listen_id, hdr);
 964                 break;
 965         case 6:
 966                 cma_save_ip6_info(id, listen_id, hdr);
 967                 break;
 968         default:
 969                 return -EINVAL;
 970         }
 971         return 0;
 972 }
 973
 974 static inline int cma_user_data_offset(struct rdma_id_private *id_priv)
 975 {
 976         return cma_family(id_priv) == AF_IB ? 0 : sizeof(struct cma_hdr);
 977 }
 978
 979 static void cma_cancel_route(struct rdma_id_private *id_priv)
 980 {
 981         if (rdma_cap_ib_sa(id_priv->id.device, id_priv->id.port_num)) {
 982                 if (id_priv->query)
 983                         ib_sa_cancel_query(id_priv->query_id, id_priv->query);
 984         }
 985 }
 986
 987 static void cma_cancel_listens(struct rdma_id_private *id_priv)
 988 {
 989         struct rdma_id_private *dev_id_priv;
 990
 991         /*
 992          * Remove from listen_any_list to prevent added devices from spawning
 993          * additional listen requests.
 994          */
 995         mutex_lock(&lock);
 996         list_del(&id_priv->list);
 997
 998         while (!list_empty(&id_priv->listen_list)) {
 999                 dev_id_priv = list_entry(id_priv->listen_list.next,
1000                                          struct rdma_id_private, listen_list);
1001                 /* sync with device removal to avoid duplicate destruction */
1002                 list_del_init(&dev_id_priv->list);
1003                 list_del(&dev_id_priv->listen_list);
1004                 mutex_unlock(&lock);
1005
1006                 rdma_destroy_id(&dev_id_priv->id);
1007                 mutex_lock(&lock);
1008         }
1009         mutex_unlock(&lock);
1010 }
1011
1012 static void cma_cancel_operation(struct rdma_id_private *id_priv,
1013                                  enum rdma_cm_state state)
1014 {
1015         switch (state) {
1016         case RDMA_CM_ADDR_QUERY:
1017                 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
1018                 break;
1019         case RDMA_CM_ROUTE_QUERY:
1020                 cma_cancel_route(id_priv);
1021                 break;
1022         case RDMA_CM_LISTEN:
1023                 if (cma_any_addr(cma_src_addr(id_priv)) && !id_priv->cma_dev)
1024                         cma_cancel_listens(id_priv);
1025                 break;
1026         default:
1027                 break;
1028         }
1029 }
1030
1031 static void cma_release_port(struct rdma_id_private *id_priv)
1032 {
1033         struct rdma_bind_list *bind_list = id_priv->bind_list;
1034
1035         if (!bind_list)
1036                 return;
1037
1038         mutex_lock(&lock);
1039         hlist_del(&id_priv->node);
1040         if (hlist_empty(&bind_list->owners)) {
1041                 idr_remove(bind_list->ps, bind_list->port);
1042                 kfree(bind_list);
1043         }
1044         mutex_unlock(&lock);
1045 }
1046
1047 static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
1048 {
1049         struct cma_multicast *mc;
1050
1051         while (!list_empty(&id_priv->mc_list)) {
1052                 mc = container_of(id_priv->mc_list.next,
1053                                   struct cma_multicast, list);
1054                 list_del(&mc->list);
1055                 if (rdma_cap_ib_mcast(id_priv->cma_dev->device,
1056                                       id_priv->id.port_num)) {
1057                         ib_sa_free_multicast(mc->multicast.ib);
1058                         kfree(mc);
1059                 } else
1060                         kref_put(&mc->mcref, release_mc);
1061         }
1062 }
1063
1064 void rdma_destroy_id(struct rdma_cm_id *id)
1065 {
1066         struct rdma_id_private *id_priv;
1067         enum rdma_cm_state state;
1068
1069         id_priv = container_of(id, struct rdma_id_private, id);
1070         state = cma_exch(id_priv, RDMA_CM_DESTROYING);
1071         cma_cancel_operation(id_priv, state);
1072
1073         /*
1074          * Wait for any active callback to finish.  New callbacks will find
1075          * the id_priv state set to destroying and abort.
1076          */
1077         mutex_lock(&id_priv->handler_mutex);
1078         mutex_unlock(&id_priv->handler_mutex);
1079
1080         if (id_priv->cma_dev) {
1081                 if (rdma_cap_ib_cm(id_priv->id.device, 1)) {
1082                         if (id_priv->cm_id.ib)
1083                                 ib_destroy_cm_id(id_priv->cm_id.ib);
1084                 } else if (rdma_cap_iw_cm(id_priv->id.device, 1)) {
1085                         if (id_priv->cm_id.iw)
1086                                 iw_destroy_cm_id(id_priv->cm_id.iw);
1087                 }
1088                 cma_leave_mc_groups(id_priv);
1089                 cma_release_dev(id_priv);
1090         }
1091
1092         cma_release_port(id_priv);
1093         cma_deref_id(id_priv);
1094         wait_for_completion(&id_priv->comp);
1095
1096         if (id_priv->internal_id)
1097                 cma_deref_id(id_priv->id.context);
1098
1099         kfree(id_priv->id.route.path_rec);
1100         kfree(id_priv);
1101 }
1102 EXPORT_SYMBOL(rdma_destroy_id);
1103
1104 static int cma_rep_recv(struct rdma_id_private *id_priv)
1105 {
1106         int ret;
1107
1108         ret = cma_modify_qp_rtr(id_priv, NULL);
1109         if (ret)
1110                 goto reject;
1111
1112         ret = cma_modify_qp_rts(id_priv, NULL);
1113         if (ret)
1114                 goto reject;
1115
1116         ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
1117         if (ret)
1118                 goto reject;
1119
1120         return 0;
1121 reject:
1122         cma_modify_qp_err(id_priv);
1123         ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
1124                        NULL, 0, NULL, 0);
1125         return ret;
1126 }
1127
1128 static void cma_set_rep_event_data(struct rdma_cm_event *event,
1129                                    struct ib_cm_rep_event_param *rep_data,
1130                                    void *private_data)
1131 {
1132         event->param.conn.private_data = private_data;
1133         event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
1134         event->param.conn.responder_resources = rep_data->responder_resources;
1135         event->param.conn.initiator_depth = rep_data->initiator_depth;
1136         event->param.conn.flow_control = rep_data->flow_control;
1137         event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
1138         event->param.conn.srq = rep_data->srq;
1139         event->param.conn.qp_num = rep_data->remote_qpn;
1140 }
1141
1142 static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1143 {
1144         struct rdma_id_private *id_priv = cm_id->context;
1145         struct rdma_cm_event event;
1146         int ret = 0;
1147
1148         if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
1149                 cma_disable_callback(id_priv, RDMA_CM_CONNECT)) ||
1150             (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
1151                 cma_disable_callback(id_priv, RDMA_CM_DISCONNECT)))
1152                 return 0;
1153
1154         memset(&event, 0, sizeof event);
1155         switch (ib_event->event) {
1156         case IB_CM_REQ_ERROR:
1157         case IB_CM_REP_ERROR:
1158                 event.event = RDMA_CM_EVENT_UNREACHABLE;
1159                 event.status = -ETIMEDOUT;
1160                 break;
1161         case IB_CM_REP_RECEIVED:
1162                 if (id_priv->id.qp) {
1163                         event.status = cma_rep_recv(id_priv);
1164                         event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
1165                                                      RDMA_CM_EVENT_ESTABLISHED;
1166                 } else {
1167                         event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
1168                 }
1169                 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
1170                                        ib_event->private_data);
1171                 break;
1172         case IB_CM_RTU_RECEIVED:
1173         case IB_CM_USER_ESTABLISHED:
1174                 event.event = RDMA_CM_EVENT_ESTABLISHED;
1175                 break;
1176         case IB_CM_DREQ_ERROR:
1177                 event.status = -ETIMEDOUT; /* fall through */
1178         case IB_CM_DREQ_RECEIVED:
1179         case IB_CM_DREP_RECEIVED:
1180                 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT,
1181                                    RDMA_CM_DISCONNECT))
1182                         goto out;
1183                 event.event = RDMA_CM_EVENT_DISCONNECTED;
1184                 break;
1185         case IB_CM_TIMEWAIT_EXIT:
1186                 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
1187                 break;
1188         case IB_CM_MRA_RECEIVED:
1189                 /* ignore event */
1190                 goto out;
1191         case IB_CM_REJ_RECEIVED:
1192                 cma_modify_qp_err(id_priv);
1193                 event.status = ib_event->param.rej_rcvd.reason;
1194                 event.event = RDMA_CM_EVENT_REJECTED;
1195                 event.param.conn.private_data = ib_event->private_data;
1196                 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
1197                 break;
1198         default:
1199                 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
1200                        ib_event->event);
1201                 goto out;
1202         }
1203
1204         ret = id_priv->id.event_handler(&id_priv->id, &event);
1205         if (ret) {
1206                 /* Destroy the CM ID by returning a non-zero value. */
1207                 id_priv->cm_id.ib = NULL;
1208                 cma_exch(id_priv, RDMA_CM_DESTROYING);
1209                 mutex_unlock(&id_priv->handler_mutex);
1210                 rdma_destroy_id(&id_priv->id);
1211                 return ret;
1212         }
1213 out:
1214         mutex_unlock(&id_priv->handler_mutex);
1215         return ret;
1216 }
1217
1218 static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
1219                                                struct ib_cm_event *ib_event)
1220 {
1221         struct rdma_id_private *id_priv;
1222         struct rdma_cm_id *id;
1223         struct rdma_route *rt;
1224         int ret;
1225
1226         id = rdma_create_id(listen_id->event_handler, listen_id->context,
1227                             listen_id->ps, ib_event->param.req_rcvd.qp_type);
1228         if (IS_ERR(id))
1229                 return NULL;
1230
1231         id_priv = container_of(id, struct rdma_id_private, id);
1232         if (cma_save_net_info(id, listen_id, ib_event))
1233                 goto err;
1234
1235         rt = &id->route;
1236         rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
1237         rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
1238                                GFP_KERNEL);
1239         if (!rt->path_rec)
1240                 goto err;
1241
1242         rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
1243         if (rt->num_paths == 2)
1244                 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1245
1246         if (cma_any_addr(cma_src_addr(id_priv))) {
1247                 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
1248                 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
1249                 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
1250         } else {
1251                 ret = cma_translate_addr(cma_src_addr(id_priv), &rt->addr.dev_addr);
1252                 if (ret)
1253                         goto err;
1254         }
1255         rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
1256
1257         id_priv->state = RDMA_CM_CONNECT;
1258         return id_priv;
1259
1260 err:
1261         rdma_destroy_id(id);
1262         return NULL;
1263 }
1264
1265 static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
1266                                               struct ib_cm_event *ib_event)
1267 {
1268         struct rdma_id_private *id_priv;
1269         struct rdma_cm_id *id;
1270         int ret;
1271
1272         id = rdma_create_id(listen_id->event_handler, listen_id->context,
1273                             listen_id->ps, IB_QPT_UD);
1274         if (IS_ERR(id))
1275                 return NULL;
1276
1277         id_priv = container_of(id, struct rdma_id_private, id);
1278         if (cma_save_net_info(id, listen_id, ib_event))
1279                 goto err;
1280
1281         if (!cma_any_addr((struct sockaddr *) &id->route.addr.src_addr)) {
1282                 ret = cma_translate_addr(cma_src_addr(id_priv), &id->route.addr.dev_addr);
1283                 if (ret)
1284                         goto err;
1285         }
1286
1287         id_priv->state = RDMA_CM_CONNECT;
1288         return id_priv;
1289 err:
1290         rdma_destroy_id(id);
1291         return NULL;
1292 }
1293
1294 static void cma_set_req_event_data(struct rdma_cm_event *event,
1295                                    struct ib_cm_req_event_param *req_data,
1296                                    void *private_data, int offset)
1297 {
1298         event->param.conn.private_data = private_data + offset;
1299         event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1300         event->param.conn.responder_resources = req_data->responder_resources;
1301         event->param.conn.initiator_depth = req_data->initiator_depth;
1302         event->param.conn.flow_control = req_data->flow_control;
1303         event->param.conn.retry_count = req_data->retry_count;
1304         event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1305         event->param.conn.srq = req_data->srq;
1306         event->param.conn.qp_num = req_data->remote_qpn;
1307 }
1308
1309 static int cma_check_req_qp_type(struct rdma_cm_id *id, struct ib_cm_event *ib_event)
1310 {
1311         return (((ib_event->event == IB_CM_REQ_RECEIVED) &&
1312                  (ib_event->param.req_rcvd.qp_type == id->qp_type)) ||
1313                 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) &&
1314                  (id->qp_type == IB_QPT_UD)) ||
1315                 (!id->qp_type));
1316 }
1317
1318 static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1319 {
1320         struct rdma_id_private *listen_id, *conn_id;
1321         struct rdma_cm_event event;
1322         int offset, ret;
1323
1324         listen_id = cm_id->context;
1325         if (!cma_check_req_qp_type(&listen_id->id, ib_event))
1326                 return -EINVAL;
1327
1328         if (cma_disable_callback(listen_id, RDMA_CM_LISTEN))
1329                 return -ECONNABORTED;
1330
1331         memset(&event, 0, sizeof event);
1332         offset = cma_user_data_offset(listen_id);
1333         event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1334         if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) {
1335                 conn_id = cma_new_udp_id(&listen_id->id, ib_event);
1336                 event.param.ud.private_data = ib_event->private_data + offset;
1337                 event.param.ud.private_data_len =
1338                                 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1339         } else {
1340                 conn_id = cma_new_conn_id(&listen_id->id, ib_event);
1341                 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1342                                        ib_event->private_data, offset);
1343         }
1344         if (!conn_id) {
1345                 ret = -ENOMEM;
1346                 goto err1;
1347         }
1348
1349         mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
1350         ret = cma_acquire_dev(conn_id, listen_id);
1351         if (ret)
1352                 goto err2;
1353
1354         conn_id->cm_id.ib = cm_id;
1355         cm_id->context = conn_id;
1356         cm_id->cm_handler = cma_ib_handler;
1357
1358         /*
1359          * Protect against the user destroying conn_id from another thread
1360          * until we're done accessing it.
1361          */
1362         atomic_inc(&conn_id->refcount);
1363         ret = conn_id->id.event_handler(&conn_id->id, &event);
1364         if (ret)
1365                 goto err3;
1366         /*
1367          * Acquire mutex to prevent user executing rdma_destroy_id()
1368          * while we're accessing the cm_id.
1369          */
1370         mutex_lock(&lock);
1371         if (cma_comp(conn_id, RDMA_CM_CONNECT) &&
1372             (conn_id->id.qp_type != IB_QPT_UD))
1373                 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1374         mutex_unlock(&lock);
1375         mutex_unlock(&conn_id->handler_mutex);
1376         mutex_unlock(&listen_id->handler_mutex);
1377         cma_deref_id(conn_id);
1378         return 0;
1379
1380 err3:
1381         cma_deref_id(conn_id);
1382         /* Destroy the CM ID by returning a non-zero value. */
1383         conn_id->cm_id.ib = NULL;
1384 err2:
1385         cma_exch(conn_id, RDMA_CM_DESTROYING);
1386         mutex_unlock(&conn_id->handler_mutex);
1387 err1:
1388         mutex_unlock(&listen_id->handler_mutex);
1389         if (conn_id)
1390                 rdma_destroy_id(&conn_id->id);
1391         return ret;
1392 }
1393
1394 __be64 rdma_get_service_id(struct rdma_cm_id *id, struct sockaddr *addr)
1395 {
1396         if (addr->sa_family == AF_IB)
1397                 return ((struct sockaddr_ib *) addr)->sib_sid;
1398
1399         return cpu_to_be64(((u64)id->ps << 16) + be16_to_cpu(cma_port(addr)));
1400 }
1401 EXPORT_SYMBOL(rdma_get_service_id);
1402
1403 static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr,
1404                                  struct ib_cm_compare_data *compare)
1405 {
1406         struct cma_hdr *cma_data, *cma_mask;
1407         __be32 ip4_addr;
1408         struct in6_addr ip6_addr;
1409
1410         memset(compare, 0, sizeof *compare);
1411         cma_data = (void *) compare->data;
1412         cma_mask = (void *) compare->mask;
1413
1414         switch (addr->sa_family) {
1415         case AF_INET:
1416                 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
1417                 cma_set_ip_ver(cma_data, 4);
1418                 cma_set_ip_ver(cma_mask, 0xF);
1419                 if (!cma_any_addr(addr)) {
1420                         cma_data->dst_addr.ip4.addr = ip4_addr;
1421                         cma_mask->dst_addr.ip4.addr = htonl(~0);
1422                 }
1423                 break;
1424         case AF_INET6:
1425                 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr;
1426                 cma_set_ip_ver(cma_data, 6);
1427                 cma_set_ip_ver(cma_mask, 0xF);
1428                 if (!cma_any_addr(addr)) {
1429                         cma_data->dst_addr.ip6 = ip6_addr;
1430                         memset(&cma_mask->dst_addr.ip6, 0xFF,
1431                                sizeof cma_mask->dst_addr.ip6);
1432                 }
1433                 break;
1434         default:
1435                 break;
1436         }
1437 }
1438
1439 static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
1440 {
1441         struct rdma_id_private *id_priv = iw_id->context;
1442         struct rdma_cm_event event;
1443         int ret = 0;
1444         struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
1445         struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
1446
1447         if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
1448                 return 0;
1449
1450         memset(&event, 0, sizeof event);
1451         switch (iw_event->event) {
1452         case IW_CM_EVENT_CLOSE:
1453                 event.event = RDMA_CM_EVENT_DISCONNECTED;
1454                 break;
1455         case IW_CM_EVENT_CONNECT_REPLY:
1456                 memcpy(cma_src_addr(id_priv), laddr,
1457                        rdma_addr_size(laddr));
1458                 memcpy(cma_dst_addr(id_priv), raddr,
1459                        rdma_addr_size(raddr));
1460                 switch (iw_event->status) {
1461                 case 0:
1462                         event.event = RDMA_CM_EVENT_ESTABLISHED;
1463                         event.param.conn.initiator_depth = iw_event->ird;
1464                         event.param.conn.responder_resources = iw_event->ord;
1465                         break;
1466                 case -ECONNRESET:
1467                 case -ECONNREFUSED:
1468                         event.event = RDMA_CM_EVENT_REJECTED;
1469                         break;
1470                 case -ETIMEDOUT:
1471                         event.event = RDMA_CM_EVENT_UNREACHABLE;
1472                         break;
1473                 default:
1474                         event.event = RDMA_CM_EVENT_CONNECT_ERROR;
1475                         break;
1476                 }
1477                 break;
1478         case IW_CM_EVENT_ESTABLISHED:
1479                 event.event = RDMA_CM_EVENT_ESTABLISHED;
1480                 event.param.conn.initiator_depth = iw_event->ird;
1481                 event.param.conn.responder_resources = iw_event->ord;
1482                 break;
1483         default:
1484                 BUG_ON(1);
1485         }
1486
1487         event.status = iw_event->status;
1488         event.param.conn.private_data = iw_event->private_data;
1489         event.param.conn.private_data_len = iw_event->private_data_len;
1490         ret = id_priv->id.event_handler(&id_priv->id, &event);
1491         if (ret) {
1492                 /* Destroy the CM ID by returning a non-zero value. */
1493                 id_priv->cm_id.iw = NULL;
1494                 cma_exch(id_priv, RDMA_CM_DESTROYING);
1495                 mutex_unlock(&id_priv->handler_mutex);
1496                 rdma_destroy_id(&id_priv->id);
1497                 return ret;
1498         }
1499
1500         mutex_unlock(&id_priv->handler_mutex);
1501         return ret;
1502 }
1503
1504 static int iw_conn_req_handler(struct iw_cm_id *cm_id,
1505                                struct iw_cm_event *iw_event)
1506 {
1507         struct rdma_cm_id *new_cm_id;
1508         struct rdma_id_private *listen_id, *conn_id;
1509         struct rdma_cm_event event;
1510         int ret;
1511         struct ib_device_attr attr;
1512         struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
1513         struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
1514
1515         listen_id = cm_id->context;
1516         if (cma_disable_callback(listen_id, RDMA_CM_LISTEN))
1517                 return -ECONNABORTED;
1518
1519         /* Create a new RDMA id for the new IW CM ID */
1520         new_cm_id = rdma_create_id(listen_id->id.event_handler,
1521                                    listen_id->id.context,
1522                                    RDMA_PS_TCP, IB_QPT_RC);
1523         if (IS_ERR(new_cm_id)) {
1524                 ret = -ENOMEM;
1525                 goto out;
1526         }
1527         conn_id = container_of(new_cm_id, struct rdma_id_private, id);
1528         mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
1529         conn_id->state = RDMA_CM_CONNECT;
1530
1531         ret = rdma_translate_ip(laddr, &conn_id->id.route.addr.dev_addr, NULL);
1532         if (ret) {
1533                 mutex_unlock(&conn_id->handler_mutex);
1534                 rdma_destroy_id(new_cm_id);
1535                 goto out;
1536         }
1537
1538         ret = cma_acquire_dev(conn_id, listen_id);
1539         if (ret) {
1540                 mutex_unlock(&conn_id->handler_mutex);
1541                 rdma_destroy_id(new_cm_id);
1542                 goto out;
1543         }
1544
1545         conn_id->cm_id.iw = cm_id;
1546         cm_id->context = conn_id;
1547         cm_id->cm_handler = cma_iw_handler;
1548
1549         memcpy(cma_src_addr(conn_id), laddr, rdma_addr_size(laddr));
1550         memcpy(cma_dst_addr(conn_id), raddr, rdma_addr_size(raddr));
1551
1552         ret = ib_query_device(conn_id->id.device, &attr);
1553         if (ret) {
1554                 mutex_unlock(&conn_id->handler_mutex);
1555                 rdma_destroy_id(new_cm_id);
1556                 goto out;
1557         }
1558
1559         memset(&event, 0, sizeof event);
1560         event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1561         event.param.conn.private_data = iw_event->private_data;
1562         event.param.conn.private_data_len = iw_event->private_data_len;
1563         event.param.conn.initiator_depth = iw_event->ird;
1564         event.param.conn.responder_resources = iw_event->ord;
1565
1566         /*
1567          * Protect against the user destroying conn_id from another thread
1568          * until we're done accessing it.
1569          */
1570         atomic_inc(&conn_id->refcount);
1571         ret = conn_id->id.event_handler(&conn_id->id, &event);
1572         if (ret) {
1573                 /* User wants to destroy the CM ID */
1574                 conn_id->cm_id.iw = NULL;
1575                 cma_exch(conn_id, RDMA_CM_DESTROYING);
1576                 mutex_unlock(&conn_id->handler_mutex);
1577                 cma_deref_id(conn_id);
1578                 rdma_destroy_id(&conn_id->id);
1579                 goto out;
1580         }
1581
1582         mutex_unlock(&conn_id->handler_mutex);
1583         cma_deref_id(conn_id);
1584
1585 out:
1586         mutex_unlock(&listen_id->handler_mutex);
1587         return ret;
1588 }
1589
1590 static int cma_ib_listen(struct rdma_id_private *id_priv)
1591 {
1592         struct ib_cm_compare_data compare_data;
1593         struct sockaddr *addr;
1594         struct ib_cm_id *id;
1595         __be64 svc_id;
1596         int ret;
1597
1598         id = ib_create_cm_id(id_priv->id.device, cma_req_handler, id_priv);
1599         if (IS_ERR(id))
1600                 return PTR_ERR(id);
1601
1602         id_priv->cm_id.ib = id;
1603
1604         addr = cma_src_addr(id_priv);
1605         svc_id = rdma_get_service_id(&id_priv->id, addr);
1606         if (cma_any_addr(addr) && !id_priv->afonly)
1607                 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL);
1608         else {
1609                 cma_set_compare_data(id_priv->id.ps, addr, &compare_data);
1610                 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data);
1611         }
1612
1613         if (ret) {
1614                 ib_destroy_cm_id(id_priv->cm_id.ib);
1615                 id_priv->cm_id.ib = NULL;
1616         }
1617
1618         return ret;
1619 }
1620
1621 static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
1622 {
1623         int ret;
1624         struct iw_cm_id *id;
1625
1626         id = iw_create_cm_id(id_priv->id.device,
1627                              iw_conn_req_handler,
1628                              id_priv);
1629         if (IS_ERR(id))
1630                 return PTR_ERR(id);
1631
1632         id->tos = id_priv->tos;
1633         id_priv->cm_id.iw = id;
1634
1635         memcpy(&id_priv->cm_id.iw->local_addr, cma_src_addr(id_priv),
1636                rdma_addr_size(cma_src_addr(id_priv)));
1637
1638         ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
1639
1640         if (ret) {
1641                 iw_destroy_cm_id(id_priv->cm_id.iw);
1642                 id_priv->cm_id.iw = NULL;
1643         }
1644
1645         return ret;
1646 }
1647
1648 static int cma_listen_handler(struct rdma_cm_id *id,
1649                               struct rdma_cm_event *event)
1650 {
1651         struct rdma_id_private *id_priv = id->context;
1652
1653         id->context = id_priv->id.context;
1654         id->event_handler = id_priv->id.event_handler;
1655         return id_priv->id.event_handler(id, event);
1656 }
1657
1658 static void cma_listen_on_dev(struct rdma_id_private *id_priv,
1659                               struct cma_device *cma_dev)
1660 {
1661         struct rdma_id_private *dev_id_priv;
1662         struct rdma_cm_id *id;
1663         int ret;
1664
1665         if (cma_family(id_priv) == AF_IB && !rdma_cap_ib_cm(cma_dev->device, 1))
1666                 return;
1667
1668         id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps,
1669                             id_priv->id.qp_type);
1670         if (IS_ERR(id))
1671                 return;
1672
1673         dev_id_priv = container_of(id, struct rdma_id_private, id);
1674
1675         dev_id_priv->state = RDMA_CM_ADDR_BOUND;
1676         memcpy(cma_src_addr(dev_id_priv), cma_src_addr(id_priv),
1677                rdma_addr_size(cma_src_addr(id_priv)));
1678
1679         cma_attach_to_dev(dev_id_priv, cma_dev);
1680         list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
1681         atomic_inc(&id_priv->refcount);
1682         dev_id_priv->internal_id = 1;
1683         dev_id_priv->afonly = id_priv->afonly;
1684
1685         ret = rdma_listen(id, id_priv->backlog);
1686         if (ret)
1687                 printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, "
1688                        "listening on device %s\n", ret, cma_dev->device->name);
1689 }
1690
1691 static void cma_listen_on_all(struct rdma_id_private *id_priv)
1692 {
1693         struct cma_device *cma_dev;
1694
1695         mutex_lock(&lock);
1696         list_add_tail(&id_priv->list, &listen_any_list);
1697         list_for_each_entry(cma_dev, &dev_list, list)
1698                 cma_listen_on_dev(id_priv, cma_dev);
1699         mutex_unlock(&lock);
1700 }
1701
1702 void rdma_set_service_type(struct rdma_cm_id *id, int tos)
1703 {
1704         struct rdma_id_private *id_priv;
1705
1706         id_priv = container_of(id, struct rdma_id_private, id);
1707         id_priv->tos = (u8) tos;
1708 }
1709 EXPORT_SYMBOL(rdma_set_service_type);
1710
1711 static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
1712                               void *context)
1713 {
1714         struct cma_work *work = context;
1715         struct rdma_route *route;
1716
1717         route = &work->id->id.route;
1718
1719         if (!status) {
1720                 route->num_paths = 1;
1721                 *route->path_rec = *path_rec;
1722         } else {
1723                 work->old_state = RDMA_CM_ROUTE_QUERY;
1724                 work->new_state = RDMA_CM_ADDR_RESOLVED;
1725                 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
1726                 work->event.status = status;
1727         }
1728
1729         queue_work(cma_wq, &work->work);
1730 }
1731
1732 static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
1733                               struct cma_work *work)
1734 {
1735         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
1736         struct ib_sa_path_rec path_rec;
1737         ib_sa_comp_mask comp_mask;
1738         struct sockaddr_in6 *sin6;
1739         struct sockaddr_ib *sib;
1740
1741         memset(&path_rec, 0, sizeof path_rec);
1742         rdma_addr_get_sgid(dev_addr, &path_rec.sgid);
1743         rdma_addr_get_dgid(dev_addr, &path_rec.dgid);
1744         path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
1745         path_rec.numb_path = 1;
1746         path_rec.reversible = 1;
1747         path_rec.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
1748
1749         comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
1750                     IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
1751                     IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
1752
1753         switch (cma_family(id_priv)) {
1754         case AF_INET:
1755                 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
1756                 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
1757                 break;
1758         case AF_INET6:
1759                 sin6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
1760                 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
1761                 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
1762                 break;
1763         case AF_IB:
1764                 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
1765                 path_rec.traffic_class = (u8) (be32_to_cpu(sib->sib_flowinfo) >> 20);
1766                 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
1767                 break;
1768         }
1769
1770         id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
1771                                                id_priv->id.port_num, &path_rec,
1772                                                comp_mask, timeout_ms,
1773                                                GFP_KERNEL, cma_query_handler,
1774                                                work, &id_priv->query);
1775
1776         return (id_priv->query_id < 0) ? id_priv->query_id : 0;
1777 }
1778
1779 static void cma_work_handler(struct work_struct *_work)
1780 {
1781         struct cma_work *work = container_of(_work, struct cma_work, work);
1782         struct rdma_id_private *id_priv = work->id;
1783         int destroy = 0;
1784
1785         mutex_lock(&id_priv->handler_mutex);
1786         if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
1787                 goto out;
1788
1789         if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1790                 cma_exch(id_priv, RDMA_CM_DESTROYING);
1791                 destroy = 1;
1792         }
1793 out:
1794         mutex_unlock(&id_priv->handler_mutex);
1795         cma_deref_id(id_priv);
1796         if (destroy)
1797                 rdma_destroy_id(&id_priv->id);
1798         kfree(work);
1799 }
1800
1801 static void cma_ndev_work_handler(struct work_struct *_work)
1802 {
1803         struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
1804         struct rdma_id_private *id_priv = work->id;
1805         int destroy = 0;
1806
1807         mutex_lock(&id_priv->handler_mutex);
1808         if (id_priv->state == RDMA_CM_DESTROYING ||
1809             id_priv->state == RDMA_CM_DEVICE_REMOVAL)
1810                 goto out;
1811
1812         if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1813                 cma_exch(id_priv, RDMA_CM_DESTROYING);
1814                 destroy = 1;
1815         }
1816
1817 out:
1818         mutex_unlock(&id_priv->handler_mutex);
1819         cma_deref_id(id_priv);
1820         if (destroy)
1821                 rdma_destroy_id(&id_priv->id);
1822         kfree(work);
1823 }
1824
1825 static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
1826 {
1827         struct rdma_route *route = &id_priv->id.route;
1828         struct cma_work *work;
1829         int ret;
1830
1831         work = kzalloc(sizeof *work, GFP_KERNEL);
1832         if (!work)
1833                 return -ENOMEM;
1834
1835         work->id = id_priv;
1836         INIT_WORK(&work->work, cma_work_handler);
1837         work->old_state = RDMA_CM_ROUTE_QUERY;
1838         work->new_state = RDMA_CM_ROUTE_RESOLVED;
1839         work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1840
1841         route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
1842         if (!route->path_rec) {
1843                 ret = -ENOMEM;
1844                 goto err1;
1845         }
1846
1847         ret = cma_query_ib_route(id_priv, timeout_ms, work);
1848         if (ret)
1849                 goto err2;
1850
1851         return 0;
1852 err2:
1853         kfree(route->path_rec);
1854         route->path_rec = NULL;
1855 err1:
1856         kfree(work);
1857         return ret;
1858 }
1859
1860 int rdma_set_ib_paths(struct rdma_cm_id *id,
1861                       struct ib_sa_path_rec *path_rec, int num_paths)
1862 {
1863         struct rdma_id_private *id_priv;
1864         int ret;
1865
1866         id_priv = container_of(id, struct rdma_id_private, id);
1867         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
1868                            RDMA_CM_ROUTE_RESOLVED))
1869                 return -EINVAL;
1870
1871         id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths,
1872                                      GFP_KERNEL);
1873         if (!id->route.path_rec) {
1874                 ret = -ENOMEM;
1875                 goto err;
1876         }
1877
1878         id->route.num_paths = num_paths;
1879         return 0;
1880 err:
1881         cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED);
1882         return ret;
1883 }
1884 EXPORT_SYMBOL(rdma_set_ib_paths);
1885
1886 static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
1887 {
1888         struct cma_work *work;
1889
1890         work = kzalloc(sizeof *work, GFP_KERNEL);
1891         if (!work)
1892                 return -ENOMEM;
1893
1894         work->id = id_priv;
1895         INIT_WORK(&work->work, cma_work_handler);
1896         work->old_state = RDMA_CM_ROUTE_QUERY;
1897         work->new_state = RDMA_CM_ROUTE_RESOLVED;
1898         work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1899         queue_work(cma_wq, &work->work);
1900         return 0;
1901 }
1902
1903 static int iboe_tos_to_sl(struct net_device *ndev, int tos)
1904 {
1905         int prio;
1906         struct net_device *dev;
1907
1908         prio = rt_tos2priority(tos);
1909         dev = ndev->priv_flags & IFF_802_1Q_VLAN ?
1910                 vlan_dev_real_dev(ndev) : ndev;
1911
1912         if (dev->num_tc)
1913                 return netdev_get_prio_tc_map(dev, prio);
1914
1915 #if IS_ENABLED(CONFIG_VLAN_8021Q)
1916         if (ndev->priv_flags & IFF_802_1Q_VLAN)
1917                 return (vlan_dev_get_egress_qos_mask(ndev, prio) &
1918                         VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
1919 #endif
1920         return 0;
1921 }
1922
1923 static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
1924 {
1925         struct rdma_route *route = &id_priv->id.route;
1926         struct rdma_addr *addr = &route->addr;
1927         struct cma_work *work;
1928         int ret;
1929         struct net_device *ndev = NULL;
1930
1931
1932         work = kzalloc(sizeof *work, GFP_KERNEL);
1933         if (!work)
1934                 return -ENOMEM;
1935
1936         work->id = id_priv;
1937         INIT_WORK(&work->work, cma_work_handler);
1938
1939         route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
1940         if (!route->path_rec) {
1941                 ret = -ENOMEM;
1942                 goto err1;
1943         }
1944
1945         route->num_paths = 1;
1946
1947         if (addr->dev_addr.bound_dev_if)
1948                 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if);
1949         if (!ndev) {
1950                 ret = -ENODEV;
1951                 goto err2;
1952         }
1953
1954         route->path_rec->vlan_id = rdma_vlan_dev_vlan_id(ndev);
1955         memcpy(route->path_rec->dmac, addr->dev_addr.dst_dev_addr, ETH_ALEN);
1956         memcpy(route->path_rec->smac, ndev->dev_addr, ndev->addr_len);
1957
1958         rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
1959                     &route->path_rec->sgid);
1960         rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.dst_addr,
1961                     &route->path_rec->dgid);
1962
1963         route->path_rec->hop_limit = 1;
1964         route->path_rec->reversible = 1;
1965         route->path_rec->pkey = cpu_to_be16(0xffff);
1966         route->path_rec->mtu_selector = IB_SA_EQ;
1967         route->path_rec->sl = iboe_tos_to_sl(ndev, id_priv->tos);
1968         route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
1969         route->path_rec->rate_selector = IB_SA_EQ;
1970         route->path_rec->rate = iboe_get_rate(ndev);
1971         dev_put(ndev);
1972         route->path_rec->packet_life_time_selector = IB_SA_EQ;
1973         route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
1974         if (!route->path_rec->mtu) {
1975                 ret = -EINVAL;
1976                 goto err2;
1977         }
1978
1979         work->old_state = RDMA_CM_ROUTE_QUERY;
1980         work->new_state = RDMA_CM_ROUTE_RESOLVED;
1981         work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1982         work->event.status = 0;
1983
1984         queue_work(cma_wq, &work->work);
1985
1986         return 0;
1987
1988 err2:
1989         kfree(route->path_rec);
1990         route->path_rec = NULL;
1991 err1:
1992         kfree(work);
1993         return ret;
1994 }
1995
1996 int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
1997 {
1998         struct rdma_id_private *id_priv;
1999         int ret;
2000
2001         id_priv = container_of(id, struct rdma_id_private, id);
2002         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY))
2003                 return -EINVAL;
2004
2005         atomic_inc(&id_priv->refcount);
2006         if (rdma_cap_ib_sa(id->device, id->port_num))
2007                 ret = cma_resolve_ib_route(id_priv, timeout_ms);
2008         else if (rdma_protocol_roce(id->device, id->port_num))
2009                 ret = cma_resolve_iboe_route(id_priv);
2010         else if (rdma_protocol_iwarp(id->device, id->port_num))
2011                 ret = cma_resolve_iw_route(id_priv, timeout_ms);
2012         else
2013                 ret = -ENOSYS;
2014
2015         if (ret)
2016                 goto err;
2017
2018         return 0;
2019 err:
2020         cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED);
2021         cma_deref_id(id_priv);
2022         return ret;
2023 }
2024 EXPORT_SYMBOL(rdma_resolve_route);
2025
2026 static void cma_set_loopback(struct sockaddr *addr)
2027 {
2028         switch (addr->sa_family) {
2029         case AF_INET:
2030                 ((struct sockaddr_in *) addr)->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
2031                 break;
2032         case AF_INET6:
2033                 ipv6_addr_set(&((struct sockaddr_in6 *) addr)->sin6_addr,
2034                               0, 0, 0, htonl(1));
2035                 break;
2036         default:
2037                 ib_addr_set(&((struct sockaddr_ib *) addr)->sib_addr,
2038                             0, 0, 0, htonl(1));
2039                 break;
2040         }
2041 }
2042
2043 static int cma_bind_loopback(struct rdma_id_private *id_priv)
2044 {
2045         struct cma_device *cma_dev, *cur_dev;
2046         struct ib_port_attr port_attr;
2047         union ib_gid gid;
2048         u16 pkey;
2049         int ret;
2050         u8 p;
2051
2052         cma_dev = NULL;
2053         mutex_lock(&lock);
2054         list_for_each_entry(cur_dev, &dev_list, list) {
2055                 if (cma_family(id_priv) == AF_IB &&
2056                     !rdma_cap_ib_cm(cur_dev->device, 1))
2057                         continue;
2058
2059                 if (!cma_dev)
2060                         cma_dev = cur_dev;
2061
2062                 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
2063                         if (!ib_query_port(cur_dev->device, p, &port_attr) &&
2064                             port_attr.state == IB_PORT_ACTIVE) {
2065                                 cma_dev = cur_dev;
2066                                 goto port_found;
2067                         }
2068                 }
2069         }
2070
2071         if (!cma_dev) {
2072                 ret = -ENODEV;
2073                 goto out;
2074         }
2075
2076         p = 1;
2077
2078 port_found:
2079         ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid);
2080         if (ret)
2081                 goto out;
2082
2083         ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
2084         if (ret)
2085                 goto out;
2086
2087         id_priv->id.route.addr.dev_addr.dev_type =
2088                 (rdma_protocol_ib(cma_dev->device, p)) ?
2089                 ARPHRD_INFINIBAND : ARPHRD_ETHER;
2090
2091         rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2092         ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
2093         id_priv->id.port_num = p;
2094         cma_attach_to_dev(id_priv, cma_dev);
2095         cma_set_loopback(cma_src_addr(id_priv));
2096 out:
2097         mutex_unlock(&lock);
2098         return ret;
2099 }
2100
2101 static void addr_handler(int status, struct sockaddr *src_addr,
2102                          struct rdma_dev_addr *dev_addr, void *context)
2103 {
2104         struct rdma_id_private *id_priv = context;
2105         struct rdma_cm_event event;
2106
2107         memset(&event, 0, sizeof event);
2108         mutex_lock(&id_priv->handler_mutex);
2109         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY,
2110                            RDMA_CM_ADDR_RESOLVED))
2111                 goto out;
2112
2113         memcpy(cma_src_addr(id_priv), src_addr, rdma_addr_size(src_addr));
2114         if (!status && !id_priv->cma_dev)
2115                 status = cma_acquire_dev(id_priv, NULL);
2116
2117         if (status) {
2118                 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2119                                    RDMA_CM_ADDR_BOUND))
2120                         goto out;
2121                 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2122                 event.status = status;
2123         } else
2124                 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2125
2126         if (id_priv->id.event_handler(&id_priv->id, &event)) {
2127                 cma_exch(id_priv, RDMA_CM_DESTROYING);
2128                 mutex_unlock(&id_priv->handler_mutex);
2129                 cma_deref_id(id_priv);
2130                 rdma_destroy_id(&id_priv->id);
2131                 return;
2132         }
2133 out:
2134         mutex_unlock(&id_priv->handler_mutex);
2135         cma_deref_id(id_priv);
2136 }
2137
2138 static int cma_resolve_loopback(struct rdma_id_private *id_priv)
2139 {
2140         struct cma_work *work;
2141         union ib_gid gid;
2142         int ret;
2143
2144         work = kzalloc(sizeof *work, GFP_KERNEL);
2145         if (!work)
2146                 return -ENOMEM;
2147
2148         if (!id_priv->cma_dev) {
2149                 ret = cma_bind_loopback(id_priv);
2150                 if (ret)
2151                         goto err;
2152         }
2153
2154         rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2155         rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
2156
2157         work->id = id_priv;
2158         INIT_WORK(&work->work, cma_work_handler);
2159         work->old_state = RDMA_CM_ADDR_QUERY;
2160         work->new_state = RDMA_CM_ADDR_RESOLVED;
2161         work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2162         queue_work(cma_wq, &work->work);
2163         return 0;
2164 err:
2165         kfree(work);
2166         return ret;
2167 }
2168
2169 static int cma_resolve_ib_addr(struct rdma_id_private *id_priv)
2170 {
2171         struct cma_work *work;
2172         int ret;
2173
2174         work = kzalloc(sizeof *work, GFP_KERNEL);
2175         if (!work)
2176                 return -ENOMEM;
2177
2178         if (!id_priv->cma_dev) {
2179                 ret = cma_resolve_ib_dev(id_priv);
2180                 if (ret)
2181                         goto err;
2182         }
2183
2184         rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, (union ib_gid *)
2185                 &(((struct sockaddr_ib *) &id_priv->id.route.addr.dst_addr)->sib_addr));
2186
2187         work->id = id_priv;
2188         INIT_WORK(&work->work, cma_work_handler);
2189         work->old_state = RDMA_CM_ADDR_QUERY;
2190         work->new_state = RDMA_CM_ADDR_RESOLVED;
2191         work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2192         queue_work(cma_wq, &work->work);
2193         return 0;
2194 err:
2195         kfree(work);
2196         return ret;
2197 }
2198
2199 static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2200                          struct sockaddr *dst_addr)
2201 {
2202         if (!src_addr || !src_addr->sa_family) {
2203                 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
2204                 src_addr->sa_family = dst_addr->sa_family;
2205                 if (dst_addr->sa_family == AF_INET6) {
2206                         ((struct sockaddr_in6 *) src_addr)->sin6_scope_id =
2207                                 ((struct sockaddr_in6 *) dst_addr)->sin6_scope_id;
2208                 } else if (dst_addr->sa_family == AF_IB) {
2209                         ((struct sockaddr_ib *) src_addr)->sib_pkey =
2210                                 ((struct sockaddr_ib *) dst_addr)->sib_pkey;
2211                 }
2212         }
2213         return rdma_bind_addr(id, src_addr);
2214 }
2215
2216 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2217                       struct sockaddr *dst_addr, int timeout_ms)
2218 {
2219         struct rdma_id_private *id_priv;
2220         int ret;
2221
2222         id_priv = container_of(id, struct rdma_id_private, id);
2223         if (id_priv->state == RDMA_CM_IDLE) {
2224                 ret = cma_bind_addr(id, src_addr, dst_addr);
2225                 if (ret)
2226                         return ret;
2227         }
2228
2229         if (cma_family(id_priv) != dst_addr->sa_family)
2230                 return -EINVAL;
2231
2232         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY))
2233                 return -EINVAL;
2234
2235         atomic_inc(&id_priv->refcount);
2236         memcpy(cma_dst_addr(id_priv), dst_addr, rdma_addr_size(dst_addr));
2237         if (cma_any_addr(dst_addr)) {
2238                 ret = cma_resolve_loopback(id_priv);
2239         } else {
2240                 if (dst_addr->sa_family == AF_IB) {
2241                         ret = cma_resolve_ib_addr(id_priv);
2242                 } else {
2243                         ret = rdma_resolve_ip(&addr_client, cma_src_addr(id_priv),
2244                                               dst_addr, &id->route.addr.dev_addr,
2245                                               timeout_ms, addr_handler, id_priv);
2246                 }
2247         }
2248         if (ret)
2249                 goto err;
2250
2251         return 0;
2252 err:
2253         cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
2254         cma_deref_id(id_priv);
2255         return ret;
2256 }
2257 EXPORT_SYMBOL(rdma_resolve_addr);
2258
2259 int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
2260 {
2261         struct rdma_id_private *id_priv;
2262         unsigned long flags;
2263         int ret;
2264
2265         id_priv = container_of(id, struct rdma_id_private, id);
2266         spin_lock_irqsave(&id_priv->lock, flags);
2267         if (reuse || id_priv->state == RDMA_CM_IDLE) {
2268                 id_priv->reuseaddr = reuse;
2269                 ret = 0;
2270         } else {
2271                 ret = -EINVAL;
2272         }
2273         spin_unlock_irqrestore(&id_priv->lock, flags);
2274         return ret;
2275 }
2276 EXPORT_SYMBOL(rdma_set_reuseaddr);
2277
2278 int rdma_set_afonly(struct rdma_cm_id *id, int afonly)
2279 {
2280         struct rdma_id_private *id_priv;
2281         unsigned long flags;
2282         int ret;
2283
2284         id_priv = container_of(id, struct rdma_id_private, id);
2285         spin_lock_irqsave(&id_priv->lock, flags);
2286         if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) {
2287                 id_priv->options |= (1 << CMA_OPTION_AFONLY);
2288                 id_priv->afonly = afonly;
2289                 ret = 0;
2290         } else {
2291                 ret = -EINVAL;
2292         }
2293         spin_unlock_irqrestore(&id_priv->lock, flags);
2294         return ret;
2295 }
2296 EXPORT_SYMBOL(rdma_set_afonly);
2297
2298 static void cma_bind_port(struct rdma_bind_list *bind_list,
2299                           struct rdma_id_private *id_priv)
2300 {
2301         struct sockaddr *addr;
2302         struct sockaddr_ib *sib;
2303         u64 sid, mask;
2304         __be16 port;
2305
2306         addr = cma_src_addr(id_priv);
2307         port = htons(bind_list->port);
2308
2309         switch (addr->sa_family) {
2310         case AF_INET:
2311                 ((struct sockaddr_in *) addr)->sin_port = port;
2312                 break;
2313         case AF_INET6:
2314                 ((struct sockaddr_in6 *) addr)->sin6_port = port;
2315                 break;
2316         case AF_IB:
2317                 sib = (struct sockaddr_ib *) addr;
2318                 sid = be64_to_cpu(sib->sib_sid);
2319                 mask = be64_to_cpu(sib->sib_sid_mask);
2320                 sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port));
2321                 sib->sib_sid_mask = cpu_to_be64(~0ULL);
2322                 break;
2323         }
2324         id_priv->bind_list = bind_list;
2325         hlist_add_head(&id_priv->node, &bind_list->owners);
2326 }
2327
2328 static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv,
2329                           unsigned short snum)
2330 {
2331         struct rdma_bind_list *bind_list;
2332         int ret;
2333
2334         bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
2335         if (!bind_list)
2336                 return -ENOMEM;
2337
2338         ret = idr_alloc(ps, bind_list, snum, snum + 1, GFP_KERNEL);
2339         if (ret < 0)
2340                 goto err;
2341
2342         bind_list->ps = ps;
2343         bind_list->port = (unsigned short)ret;
2344         cma_bind_port(bind_list, id_priv);
2345         return 0;
2346 err:
2347         kfree(bind_list);
2348         return ret == -ENOSPC ? -EADDRNOTAVAIL : ret;
2349 }
2350
2351 static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv)
2352 {
2353         static unsigned int last_used_port;
2354         int low, high, remaining;
2355         unsigned int rover;
2356
2357         inet_get_local_port_range(&init_net, &low, &high);
2358         remaining = (high - low) + 1;
2359         rover = prandom_u32() % remaining + low;
2360 retry:
2361         if (last_used_port != rover &&
2362             !idr_find(ps, (unsigned short) rover)) {
2363                 int ret = cma_alloc_port(ps, id_priv, rover);
2364                 /*
2365                  * Remember previously used port number in order to avoid
2366                  * re-using same port immediately after it is closed.
2367                  */
2368                 if (!ret)
2369                         last_used_port = rover;
2370                 if (ret != -EADDRNOTAVAIL)
2371                         return ret;
2372         }
2373         if (--remaining) {
2374                 rover++;
2375                 if ((rover < low) || (rover > high))
2376                         rover = low;
2377                 goto retry;
2378         }
2379         return -EADDRNOTAVAIL;
2380 }
2381
2382 /*
2383  * Check that the requested port is available.  This is called when trying to
2384  * bind to a specific port, or when trying to listen on a bound port.  In
2385  * the latter case, the provided id_priv may already be on the bind_list, but
2386  * we still need to check that it's okay to start listening.
2387  */
2388 static int cma_check_port(struct rdma_bind_list *bind_list,
2389                           struct rdma_id_private *id_priv, uint8_t reuseaddr)
2390 {
2391         struct rdma_id_private *cur_id;
2392         struct sockaddr *addr, *cur_addr;
2393
2394         addr = cma_src_addr(id_priv);
2395         hlist_for_each_entry(cur_id, &bind_list->owners, node) {
2396                 if (id_priv == cur_id)
2397                         continue;
2398
2399                 if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr &&
2400                     cur_id->reuseaddr)
2401                         continue;
2402
2403                 cur_addr = cma_src_addr(cur_id);
2404                 if (id_priv->afonly && cur_id->afonly &&
2405                     (addr->sa_family != cur_addr->sa_family))
2406                         continue;
2407
2408                 if (cma_any_addr(addr) || cma_any_addr(cur_addr))
2409                         return -EADDRNOTAVAIL;
2410
2411                 if (!cma_addr_cmp(addr, cur_addr))
2412                         return -EADDRINUSE;
2413         }
2414         return 0;
2415 }
2416
2417 static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv)
2418 {
2419         struct rdma_bind_list *bind_list;
2420         unsigned short snum;
2421         int ret;
2422
2423         snum = ntohs(cma_port(cma_src_addr(id_priv)));
2424         if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
2425                 return -EACCES;
2426
2427         bind_list = idr_find(ps, snum);
2428         if (!bind_list) {
2429                 ret = cma_alloc_port(ps, id_priv, snum);
2430         } else {
2431                 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
2432                 if (!ret)
2433                         cma_bind_port(bind_list, id_priv);
2434         }
2435         return ret;
2436 }
2437
2438 static int cma_bind_listen(struct rdma_id_private *id_priv)
2439 {
2440         struct rdma_bind_list *bind_list = id_priv->bind_list;
2441         int ret = 0;
2442
2443         mutex_lock(&lock);
2444         if (bind_list->owners.first->next)
2445                 ret = cma_check_port(bind_list, id_priv, 0);
2446         mutex_unlock(&lock);
2447         return ret;
2448 }
2449
2450 static struct idr *cma_select_inet_ps(struct rdma_id_private *id_priv)
2451 {
2452         switch (id_priv->id.ps) {
2453         case RDMA_PS_TCP:
2454                 return &tcp_ps;
2455         case RDMA_PS_UDP:
2456                 return &udp_ps;
2457         case RDMA_PS_IPOIB:
2458                 return &ipoib_ps;
2459         case RDMA_PS_IB:
2460                 return &ib_ps;
2461         default:
2462                 return NULL;
2463         }
2464 }
2465
2466 static struct idr *cma_select_ib_ps(struct rdma_id_private *id_priv)
2467 {
2468         struct idr *ps = NULL;
2469         struct sockaddr_ib *sib;
2470         u64 sid_ps, mask, sid;
2471
2472         sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
2473         mask = be64_to_cpu(sib->sib_sid_mask) & RDMA_IB_IP_PS_MASK;
2474         sid = be64_to_cpu(sib->sib_sid) & mask;
2475
2476         if ((id_priv->id.ps == RDMA_PS_IB) && (sid == (RDMA_IB_IP_PS_IB & mask))) {
2477                 sid_ps = RDMA_IB_IP_PS_IB;
2478                 ps = &ib_ps;
2479         } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_TCP)) &&
2480                    (sid == (RDMA_IB_IP_PS_TCP & mask))) {
2481                 sid_ps = RDMA_IB_IP_PS_TCP;
2482                 ps = &tcp_ps;
2483         } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_UDP)) &&
2484                    (sid == (RDMA_IB_IP_PS_UDP & mask))) {
2485                 sid_ps = RDMA_IB_IP_PS_UDP;
2486                 ps = &udp_ps;
2487         }
2488
2489         if (ps) {
2490                 sib->sib_sid = cpu_to_be64(sid_ps | ntohs(cma_port((struct sockaddr *) sib)));
2491                 sib->sib_sid_mask = cpu_to_be64(RDMA_IB_IP_PS_MASK |
2492                                                 be64_to_cpu(sib->sib_sid_mask));
2493         }
2494         return ps;
2495 }
2496
2497 static int cma_get_port(struct rdma_id_private *id_priv)
2498 {
2499         struct idr *ps;
2500         int ret;
2501
2502         if (cma_family(id_priv) != AF_IB)
2503                 ps = cma_select_inet_ps(id_priv);
2504         else
2505                 ps = cma_select_ib_ps(id_priv);
2506         if (!ps)
2507                 return -EPROTONOSUPPORT;
2508
2509         mutex_lock(&lock);
2510         if (cma_any_port(cma_src_addr(id_priv)))
2511                 ret = cma_alloc_any_port(ps, id_priv);
2512         else
2513                 ret = cma_use_port(ps, id_priv);
2514         mutex_unlock(&lock);
2515
2516         return ret;
2517 }
2518
2519 static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
2520                                struct sockaddr *addr)
2521 {
2522 #if IS_ENABLED(CONFIG_IPV6)
2523         struct sockaddr_in6 *sin6;
2524
2525         if (addr->sa_family != AF_INET6)
2526                 return 0;
2527
2528         sin6 = (struct sockaddr_in6 *) addr;
2529
2530         if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL))
2531                 return 0;
2532
2533         if (!sin6->sin6_scope_id)
2534                         return -EINVAL;
2535
2536         dev_addr->bound_dev_if = sin6->sin6_scope_id;
2537 #endif
2538         return 0;
2539 }
2540
2541 int rdma_listen(struct rdma_cm_id *id, int backlog)
2542 {
2543         struct rdma_id_private *id_priv;
2544         int ret;
2545
2546         id_priv = container_of(id, struct rdma_id_private, id);
2547         if (id_priv->state == RDMA_CM_IDLE) {
2548                 id->route.addr.src_addr.ss_family = AF_INET;
2549                 ret = rdma_bind_addr(id, cma_src_addr(id_priv));
2550                 if (ret)
2551                         return ret;
2552         }
2553
2554         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN))
2555                 return -EINVAL;
2556
2557         if (id_priv->reuseaddr) {
2558                 ret = cma_bind_listen(id_priv);
2559                 if (ret)
2560                         goto err;
2561         }
2562
2563         id_priv->backlog = backlog;
2564         if (id->device) {
2565                 if (rdma_cap_ib_cm(id->device, 1)) {
2566                         ret = cma_ib_listen(id_priv);
2567                         if (ret)
2568                                 goto err;
2569                 } else if (rdma_cap_iw_cm(id->device, 1)) {
2570                         ret = cma_iw_listen(id_priv, backlog);
2571                         if (ret)
2572                                 goto err;
2573                 } else {
2574                         ret = -ENOSYS;
2575                         goto err;
2576                 }
2577         } else
2578                 cma_listen_on_all(id_priv);
2579
2580         return 0;
2581 err:
2582         id_priv->backlog = 0;
2583         cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND);
2584         return ret;
2585 }
2586 EXPORT_SYMBOL(rdma_listen);
2587
2588 int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
2589 {
2590         struct rdma_id_private *id_priv;
2591         int ret;
2592
2593         if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6 &&
2594             addr->sa_family != AF_IB)
2595                 return -EAFNOSUPPORT;
2596
2597         id_priv = container_of(id, struct rdma_id_private, id);
2598         if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND))
2599                 return -EINVAL;
2600
2601         ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
2602         if (ret)
2603                 goto err1;
2604
2605         memcpy(cma_src_addr(id_priv), addr, rdma_addr_size(addr));
2606         if (!cma_any_addr(addr)) {
2607                 ret = cma_translate_addr(addr, &id->route.addr.dev_addr);
2608                 if (ret)
2609                         goto err1;
2610
2611                 ret = cma_acquire_dev(id_priv, NULL);
2612                 if (ret)
2613                         goto err1;
2614         }
2615
2616         if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) {
2617                 if (addr->sa_family == AF_INET)
2618                         id_priv->afonly = 1;
2619 #if IS_ENABLED(CONFIG_IPV6)
2620                 else if (addr->sa_family == AF_INET6)
2621                         id_priv->afonly = init_net.ipv6.sysctl.bindv6only;
2622 #endif
2623         }
2624         ret = cma_get_port(id_priv);
2625         if (ret)
2626                 goto err2;
2627
2628         return 0;
2629 err2:
2630         if (id_priv->cma_dev)
2631                 cma_release_dev(id_priv);
2632 err1:
2633         cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE);
2634         return ret;
2635 }
2636 EXPORT_SYMBOL(rdma_bind_addr);
2637
2638 static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv)
2639 {
2640         struct cma_hdr *cma_hdr;
2641
2642         cma_hdr = hdr;
2643         cma_hdr->cma_version = CMA_VERSION;
2644         if (cma_family(id_priv) == AF_INET) {
2645                 struct sockaddr_in *src4, *dst4;
2646
2647                 src4 = (struct sockaddr_in *) cma_src_addr(id_priv);
2648                 dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv);
2649
2650                 cma_set_ip_ver(cma_hdr, 4);
2651                 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2652                 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2653                 cma_hdr->port = src4->sin_port;
2654         } else if (cma_family(id_priv) == AF_INET6) {
2655                 struct sockaddr_in6 *src6, *dst6;
2656
2657                 src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
2658                 dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv);
2659
2660                 cma_set_ip_ver(cma_hdr, 6);
2661                 cma_hdr->src_addr.ip6 = src6->sin6_addr;
2662                 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
2663                 cma_hdr->port = src6->sin6_port;
2664         }
2665         return 0;
2666 }
2667
2668 static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
2669                                 struct ib_cm_event *ib_event)
2670 {
2671         struct rdma_id_private *id_priv = cm_id->context;
2672         struct rdma_cm_event event;
2673         struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
2674         int ret = 0;
2675
2676         if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
2677                 return 0;
2678
2679         memset(&event, 0, sizeof event);
2680         switch (ib_event->event) {
2681         case IB_CM_SIDR_REQ_ERROR:
2682                 event.event = RDMA_CM_EVENT_UNREACHABLE;
2683                 event.status = -ETIMEDOUT;
2684                 break;
2685         case IB_CM_SIDR_REP_RECEIVED:
2686                 event.param.ud.private_data = ib_event->private_data;
2687                 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
2688                 if (rep->status != IB_SIDR_SUCCESS) {
2689                         event.event = RDMA_CM_EVENT_UNREACHABLE;
2690                         event.status = ib_event->param.sidr_rep_rcvd.status;
2691                         break;
2692                 }
2693                 ret = cma_set_qkey(id_priv, rep->qkey);
2694                 if (ret) {
2695                         event.event = RDMA_CM_EVENT_ADDR_ERROR;
2696                         event.status = ret;
2697                         break;
2698                 }
2699                 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
2700                                      id_priv->id.route.path_rec,
2701                                      &event.param.ud.ah_attr);
2702                 event.param.ud.qp_num = rep->qpn;
2703                 event.param.ud.qkey = rep->qkey;
2704                 event.event = RDMA_CM_EVENT_ESTABLISHED;
2705                 event.status = 0;
2706                 break;
2707         default:
2708                 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
2709                        ib_event->event);
2710                 goto out;
2711         }
2712
2713         ret = id_priv->id.event_handler(&id_priv->id, &event);
2714         if (ret) {
2715                 /* Destroy the CM ID by returning a non-zero value. */
2716                 id_priv->cm_id.ib = NULL;
2717                 cma_exch(id_priv, RDMA_CM_DESTROYING);
2718                 mutex_unlock(&id_priv->handler_mutex);
2719                 rdma_destroy_id(&id_priv->id);
2720                 return ret;
2721         }
2722 out:
2723         mutex_unlock(&id_priv->handler_mutex);
2724         return ret;
2725 }
2726
2727 static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
2728                               struct rdma_conn_param *conn_param)
2729 {
2730         struct ib_cm_sidr_req_param req;
2731         struct ib_cm_id *id;
2732         void *private_data;
2733         int offset, ret;
2734
2735         memset(&req, 0, sizeof req);
2736         offset = cma_user_data_offset(id_priv);
2737         req.private_data_len = offset + conn_param->private_data_len;
2738         if (req.private_data_len < conn_param->private_data_len)
2739                 return -EINVAL;
2740
2741         if (req.private_data_len) {
2742                 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2743                 if (!private_data)
2744                         return -ENOMEM;
2745         } else {
2746                 private_data = NULL;
2747         }
2748
2749         if (conn_param->private_data && conn_param->private_data_len)
2750                 memcpy(private_data + offset, conn_param->private_data,
2751                        conn_param->private_data_len);
2752
2753         if (private_data) {
2754                 ret = cma_format_hdr(private_data, id_priv);
2755                 if (ret)
2756                         goto out;
2757                 req.private_data = private_data;
2758         }
2759
2760         id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler,
2761                              id_priv);
2762         if (IS_ERR(id)) {
2763                 ret = PTR_ERR(id);
2764                 goto out;
2765         }
2766         id_priv->cm_id.ib = id;
2767
2768         req.path = id_priv->id.route.path_rec;
2769         req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
2770         req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
2771         req.max_cm_retries = CMA_MAX_CM_RETRIES;
2772
2773         ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
2774         if (ret) {
2775                 ib_destroy_cm_id(id_priv->cm_id.ib);
2776                 id_priv->cm_id.ib = NULL;
2777         }
2778 out:
2779         kfree(private_data);
2780         return ret;
2781 }
2782
2783 static int cma_connect_ib(struct rdma_id_private *id_priv,
2784                           struct rdma_conn_param *conn_param)
2785 {
2786         struct ib_cm_req_param req;
2787         struct rdma_route *route;
2788         void *private_data;
2789         struct ib_cm_id *id;
2790         int offset, ret;
2791
2792         memset(&req, 0, sizeof req);
2793         offset = cma_user_data_offset(id_priv);
2794         req.private_data_len = offset + conn_param->private_data_len;
2795         if (req.private_data_len < conn_param->private_data_len)
2796                 return -EINVAL;
2797
2798         if (req.private_data_len) {
2799                 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2800                 if (!private_data)
2801                         return -ENOMEM;
2802         } else {
2803                 private_data = NULL;
2804         }
2805
2806         if (conn_param->private_data && conn_param->private_data_len)
2807                 memcpy(private_data + offset, conn_param->private_data,
2808                        conn_param->private_data_len);
2809
2810         id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv);
2811         if (IS_ERR(id)) {
2812                 ret = PTR_ERR(id);
2813                 goto out;
2814         }
2815         id_priv->cm_id.ib = id;
2816
2817         route = &id_priv->id.route;
2818         if (private_data) {
2819                 ret = cma_format_hdr(private_data, id_priv);
2820                 if (ret)
2821                         goto out;
2822                 req.private_data = private_data;
2823         }
2824
2825         req.primary_path = &route->path_rec[0];
2826         if (route->num_paths == 2)
2827                 req.alternate_path = &route->path_rec[1];
2828
2829         req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
2830         req.qp_num = id_priv->qp_num;
2831         req.qp_type = id_priv->id.qp_type;
2832         req.starting_psn = id_priv->seq_num;
2833         req.responder_resources = conn_param->responder_resources;
2834         req.initiator_depth = conn_param->initiator_depth;
2835         req.flow_control = conn_param->flow_control;
2836         req.retry_count = min_t(u8, 7, conn_param->retry_count);
2837         req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
2838         req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2839         req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2840         req.max_cm_retries = CMA_MAX_CM_RETRIES;
2841         req.srq = id_priv->srq ? 1 : 0;
2842
2843         ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
2844 out:
2845         if (ret && !IS_ERR(id)) {
2846                 ib_destroy_cm_id(id);
2847                 id_priv->cm_id.ib = NULL;
2848         }
2849
2850         kfree(private_data);
2851         return ret;
2852 }
2853
2854 static int cma_connect_iw(struct rdma_id_private *id_priv,
2855                           struct rdma_conn_param *conn_param)
2856 {
2857         struct iw_cm_id *cm_id;
2858         int ret;
2859         struct iw_cm_conn_param iw_param;
2860
2861         cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
2862         if (IS_ERR(cm_id))
2863                 return PTR_ERR(cm_id);
2864
2865         cm_id->tos = id_priv->tos;
2866         id_priv->cm_id.iw = cm_id;
2867
2868         memcpy(&cm_id->local_addr, cma_src_addr(id_priv),
2869                rdma_addr_size(cma_src_addr(id_priv)));
2870         memcpy(&cm_id->remote_addr, cma_dst_addr(id_priv),
2871                rdma_addr_size(cma_dst_addr(id_priv)));
2872
2873         ret = cma_modify_qp_rtr(id_priv, conn_param);
2874         if (ret)
2875                 goto out;
2876
2877         if (conn_param) {
2878                 iw_param.ord = conn_param->initiator_depth;
2879                 iw_param.ird = conn_param->responder_resources;
2880                 iw_param.private_data = conn_param->private_data;
2881                 iw_param.private_data_len = conn_param->private_data_len;
2882                 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num;
2883         } else {
2884                 memset(&iw_param, 0, sizeof iw_param);
2885                 iw_param.qpn = id_priv->qp_num;
2886         }
2887         ret = iw_cm_connect(cm_id, &iw_param);
2888 out:
2889         if (ret) {
2890                 iw_destroy_cm_id(cm_id);
2891                 id_priv->cm_id.iw = NULL;
2892         }
2893         return ret;
2894 }
2895
2896 int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2897 {
2898         struct rdma_id_private *id_priv;
2899         int ret;
2900
2901         id_priv = container_of(id, struct rdma_id_private, id);
2902         if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT))
2903                 return -EINVAL;
2904
2905         if (!id->qp) {
2906                 id_priv->qp_num = conn_param->qp_num;
2907                 id_priv->srq = conn_param->srq;
2908         }
2909
2910         if (rdma_cap_ib_cm(id->device, id->port_num)) {
2911                 if (id->qp_type == IB_QPT_UD)
2912                         ret = cma_resolve_ib_udp(id_priv, conn_param);
2913                 else
2914                         ret = cma_connect_ib(id_priv, conn_param);
2915         } else if (rdma_cap_iw_cm(id->device, id->port_num))
2916                 ret = cma_connect_iw(id_priv, conn_param);
2917         else
2918                 ret = -ENOSYS;
2919         if (ret)
2920                 goto err;
2921
2922         return 0;
2923 err:
2924         cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED);
2925         return ret;
2926 }
2927 EXPORT_SYMBOL(rdma_connect);
2928
2929 static int cma_accept_ib(struct rdma_id_private *id_priv,
2930                          struct rdma_conn_param *conn_param)
2931 {
2932         struct ib_cm_rep_param rep;
2933         int ret;
2934
2935         ret = cma_modify_qp_rtr(id_priv, conn_param);
2936         if (ret)
2937                 goto out;
2938
2939         ret = cma_modify_qp_rts(id_priv, conn_param);
2940         if (ret)
2941                 goto out;
2942
2943         memset(&rep, 0, sizeof rep);
2944         rep.qp_num = id_priv->qp_num;
2945         rep.starting_psn = id_priv->seq_num;
2946         rep.private_data = conn_param->private_data;
2947         rep.private_data_len = conn_param->private_data_len;
2948         rep.responder_resources = conn_param->responder_resources;
2949         rep.initiator_depth = conn_param->initiator_depth;
2950         rep.failover_accepted = 0;
2951         rep.flow_control = conn_param->flow_control;
2952         rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
2953         rep.srq = id_priv->srq ? 1 : 0;
2954
2955         ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
2956 out:
2957         return ret;
2958 }
2959
2960 static int cma_accept_iw(struct rdma_id_private *id_priv,
2961                   struct rdma_conn_param *conn_param)
2962 {
2963         struct iw_cm_conn_param iw_param;
2964         int ret;
2965
2966         ret = cma_modify_qp_rtr(id_priv, conn_param);
2967         if (ret)
2968                 return ret;
2969
2970         iw_param.ord = conn_param->initiator_depth;
2971         iw_param.ird = conn_param->responder_resources;
2972         iw_param.private_data = conn_param->private_data;
2973         iw_param.private_data_len = conn_param->private_data_len;
2974         if (id_priv->id.qp) {
2975                 iw_param.qpn = id_priv->qp_num;
2976         } else
2977                 iw_param.qpn = conn_param->qp_num;
2978
2979         return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
2980 }
2981
2982 static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
2983                              enum ib_cm_sidr_status status, u32 qkey,
2984                              const void *private_data, int private_data_len)
2985 {
2986         struct ib_cm_sidr_rep_param rep;
2987         int ret;
2988
2989         memset(&rep, 0, sizeof rep);
2990         rep.status = status;
2991         if (status == IB_SIDR_SUCCESS) {
2992                 ret = cma_set_qkey(id_priv, qkey);
2993                 if (ret)
2994                         return ret;
2995                 rep.qp_num = id_priv->qp_num;
2996                 rep.qkey = id_priv->qkey;
2997         }
2998         rep.private_data = private_data;
2999         rep.private_data_len = private_data_len;
3000
3001         return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
3002 }
3003
3004 int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
3005 {
3006         struct rdma_id_private *id_priv;
3007         int ret;
3008
3009         id_priv = container_of(id, struct rdma_id_private, id);
3010
3011         id_priv->owner = task_pid_nr(current);
3012
3013         if (!cma_comp(id_priv, RDMA_CM_CONNECT))
3014                 return -EINVAL;
3015
3016         if (!id->qp && conn_param) {
3017                 id_priv->qp_num = conn_param->qp_num;
3018                 id_priv->srq = conn_param->srq;
3019         }
3020
3021         if (rdma_cap_ib_cm(id->device, id->port_num)) {
3022                 if (id->qp_type == IB_QPT_UD) {
3023                         if (conn_param)
3024                                 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
3025                                                         conn_param->qkey,
3026                                                         conn_param->private_data,
3027                                                         conn_param->private_data_len);
3028                         else
3029                                 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
3030                                                         0, NULL, 0);
3031                 } else {
3032                         if (conn_param)
3033                                 ret = cma_accept_ib(id_priv, conn_param);
3034                         else
3035                                 ret = cma_rep_recv(id_priv);
3036                 }
3037         } else if (rdma_cap_iw_cm(id->device, id->port_num))
3038                 ret = cma_accept_iw(id_priv, conn_param);
3039         else
3040                 ret = -ENOSYS;
3041
3042         if (ret)
3043                 goto reject;
3044
3045         return 0;
3046 reject:
3047         cma_modify_qp_err(id_priv);
3048         rdma_reject(id, NULL, 0);
3049         return ret;
3050 }
3051 EXPORT_SYMBOL(rdma_accept);
3052
3053 int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
3054 {
3055         struct rdma_id_private *id_priv;
3056         int ret;
3057
3058         id_priv = container_of(id, struct rdma_id_private, id);
3059         if (!id_priv->cm_id.ib)
3060                 return -EINVAL;
3061
3062         switch (id->device->node_type) {
3063         case RDMA_NODE_IB_CA:
3064                 ret = ib_cm_notify(id_priv->cm_id.ib, event);
3065                 break;
3066         default:
3067                 ret = 0;
3068                 break;
3069         }
3070         return ret;
3071 }
3072 EXPORT_SYMBOL(rdma_notify);
3073
3074 int rdma_reject(struct rdma_cm_id *id, const void *private_data,
3075                 u8 private_data_len)
3076 {
3077         struct rdma_id_private *id_priv;
3078         int ret;
3079
3080         id_priv = container_of(id, struct rdma_id_private, id);
3081         if (!id_priv->cm_id.ib)
3082                 return -EINVAL;
3083
3084         if (rdma_cap_ib_cm(id->device, id->port_num)) {
3085                 if (id->qp_type == IB_QPT_UD)
3086                         ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0,
3087                                                 private_data, private_data_len);
3088                 else
3089                         ret = ib_send_cm_rej(id_priv->cm_id.ib,
3090                                              IB_CM_REJ_CONSUMER_DEFINED, NULL,
3091                                              0, private_data, private_data_len);
3092         } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
3093                 ret = iw_cm_reject(id_priv->cm_id.iw,
3094                                    private_data, private_data_len);
3095         } else
3096                 ret = -ENOSYS;
3097
3098         return ret;
3099 }
3100 EXPORT_SYMBOL(rdma_reject);
3101
3102 int rdma_disconnect(struct rdma_cm_id *id)
3103 {
3104         struct rdma_id_private *id_priv;
3105         int ret;
3106
3107         id_priv = container_of(id, struct rdma_id_private, id);
3108         if (!id_priv->cm_id.ib)
3109                 return -EINVAL;
3110
3111         if (rdma_cap_ib_cm(id->device, id->port_num)) {
3112                 ret = cma_modify_qp_err(id_priv);
3113                 if (ret)
3114                         goto out;
3115                 /* Initiate or respond to a disconnect. */
3116                 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
3117                         ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
3118         } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
3119                 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
3120         } else
3121                 ret = -EINVAL;
3122
3123 out:
3124         return ret;
3125 }
3126 EXPORT_SYMBOL(rdma_disconnect);
3127
3128 static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
3129 {
3130         struct rdma_id_private *id_priv;
3131         struct cma_multicast *mc = multicast->context;
3132         struct rdma_cm_event event;
3133         int ret;
3134
3135         id_priv = mc->id_priv;
3136         if (cma_disable_callback(id_priv, RDMA_CM_ADDR_BOUND) &&
3137             cma_disable_callback(id_priv, RDMA_CM_ADDR_RESOLVED))
3138                 return 0;
3139
3140         if (!status)
3141                 status = cma_set_qkey(id_priv, be32_to_cpu(multicast->rec.qkey));
3142         mutex_lock(&id_priv->qp_mutex);
3143         if (!status && id_priv->id.qp)
3144                 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
3145                                          be16_to_cpu(multicast->rec.mlid));
3146         mutex_unlock(&id_priv->qp_mutex);
3147
3148         memset(&event, 0, sizeof event);
3149         event.status = status;
3150         event.param.ud.private_data = mc->context;
3151         if (!status) {
3152                 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
3153                 ib_init_ah_from_mcmember(id_priv->id.device,
3154                                          id_priv->id.port_num, &multicast->rec,
3155                                          &event.param.ud.ah_attr);
3156                 event.param.ud.qp_num = 0xFFFFFF;
3157                 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
3158         } else
3159                 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
3160
3161         ret = id_priv->id.event_handler(&id_priv->id, &event);
3162         if (ret) {
3163                 cma_exch(id_priv, RDMA_CM_DESTROYING);
3164                 mutex_unlock(&id_priv->handler_mutex);
3165                 rdma_destroy_id(&id_priv->id);
3166                 return 0;
3167         }
3168
3169         mutex_unlock(&id_priv->handler_mutex);
3170         return 0;
3171 }
3172
3173 static void cma_set_mgid(struct rdma_id_private *id_priv,
3174                          struct sockaddr *addr, union ib_gid *mgid)
3175 {
3176         unsigned char mc_map[MAX_ADDR_LEN];
3177         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3178         struct sockaddr_in *sin = (struct sockaddr_in *) addr;
3179         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
3180
3181         if (cma_any_addr(addr)) {
3182                 memset(mgid, 0, sizeof *mgid);
3183         } else if ((addr->sa_family == AF_INET6) &&
3184                    ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
3185                                                                  0xFF10A01B)) {
3186                 /* IPv6 address is an SA assigned MGID. */
3187                 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3188         } else if (addr->sa_family == AF_IB) {
3189                 memcpy(mgid, &((struct sockaddr_ib *) addr)->sib_addr, sizeof *mgid);
3190         } else if ((addr->sa_family == AF_INET6)) {
3191                 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
3192                 if (id_priv->id.ps == RDMA_PS_UDP)
3193                         mc_map[7] = 0x01;       /* Use RDMA CM signature */
3194                 *mgid = *(union ib_gid *) (mc_map + 4);
3195         } else {
3196                 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
3197                 if (id_priv->id.ps == RDMA_PS_UDP)
3198                         mc_map[7] = 0x01;       /* Use RDMA CM signature */
3199                 *mgid = *(union ib_gid *) (mc_map + 4);
3200         }
3201 }
3202
3203 static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
3204                                  struct cma_multicast *mc)
3205 {
3206         struct ib_sa_mcmember_rec rec;
3207         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3208         ib_sa_comp_mask comp_mask;
3209         int ret;
3210
3211         ib_addr_get_mgid(dev_addr, &rec.mgid);
3212         ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
3213                                      &rec.mgid, &rec);
3214         if (ret)
3215                 return ret;
3216
3217         ret = cma_set_qkey(id_priv, 0);
3218         if (ret)
3219                 return ret;
3220
3221         cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
3222         rec.qkey = cpu_to_be32(id_priv->qkey);
3223         rdma_addr_get_sgid(dev_addr, &rec.port_gid);
3224         rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
3225         rec.join_state = 1;
3226
3227         comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
3228                     IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
3229                     IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
3230                     IB_SA_MCMEMBER_REC_FLOW_LABEL |
3231                     IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
3232
3233         if (id_priv->id.ps == RDMA_PS_IPOIB)
3234                 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
3235                              IB_SA_MCMEMBER_REC_RATE_SELECTOR |
3236                              IB_SA_MCMEMBER_REC_MTU_SELECTOR |
3237                              IB_SA_MCMEMBER_REC_MTU |
3238                              IB_SA_MCMEMBER_REC_HOP_LIMIT;
3239
3240         mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
3241                                                 id_priv->id.port_num, &rec,
3242                                                 comp_mask, GFP_KERNEL,
3243                                                 cma_ib_mc_handler, mc);
3244         return PTR_ERR_OR_ZERO(mc->multicast.ib);
3245 }
3246
3247 static void iboe_mcast_work_handler(struct work_struct *work)
3248 {
3249         struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
3250         struct cma_multicast *mc = mw->mc;
3251         struct ib_sa_multicast *m = mc->multicast.ib;
3252
3253         mc->multicast.ib->context = mc;
3254         cma_ib_mc_handler(0, m);
3255         kref_put(&mc->mcref, release_mc);
3256         kfree(mw);
3257 }
3258
3259 static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid)
3260 {
3261         struct sockaddr_in *sin = (struct sockaddr_in *)addr;
3262         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
3263
3264         if (cma_any_addr(addr)) {
3265                 memset(mgid, 0, sizeof *mgid);
3266         } else if (addr->sa_family == AF_INET6) {
3267                 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3268         } else {
3269                 mgid->raw[0] = 0xff;
3270                 mgid->raw[1] = 0x0e;
3271                 mgid->raw[2] = 0;
3272                 mgid->raw[3] = 0;
3273                 mgid->raw[4] = 0;
3274                 mgid->raw[5] = 0;
3275                 mgid->raw[6] = 0;
3276                 mgid->raw[7] = 0;
3277                 mgid->raw[8] = 0;
3278                 mgid->raw[9] = 0;
3279                 mgid->raw[10] = 0xff;
3280                 mgid->raw[11] = 0xff;
3281                 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
3282         }
3283 }
3284
3285 static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
3286                                    struct cma_multicast *mc)
3287 {
3288         struct iboe_mcast_work *work;
3289         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3290         int err;
3291         struct sockaddr *addr = (struct sockaddr *)&mc->addr;
3292         struct net_device *ndev = NULL;
3293
3294         if (cma_zero_addr((struct sockaddr *)&mc->addr))
3295                 return -EINVAL;
3296
3297         work = kzalloc(sizeof *work, GFP_KERNEL);
3298         if (!work)
3299                 return -ENOMEM;
3300
3301         mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
3302         if (!mc->multicast.ib) {
3303                 err = -ENOMEM;
3304                 goto out1;
3305         }
3306
3307         cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid);
3308
3309         mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
3310         if (id_priv->id.ps == RDMA_PS_UDP)
3311                 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
3312
3313         if (dev_addr->bound_dev_if)
3314                 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
3315         if (!ndev) {
3316                 err = -ENODEV;
3317                 goto out2;
3318         }
3319         mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
3320         mc->multicast.ib->rec.hop_limit = 1;
3321         mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu);
3322         dev_put(ndev);
3323         if (!mc->multicast.ib->rec.mtu) {
3324                 err = -EINVAL;
3325                 goto out2;
3326         }
3327         rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
3328                     &mc->multicast.ib->rec.port_gid);
3329         work->id = id_priv;
3330         work->mc = mc;
3331         INIT_WORK(&work->work, iboe_mcast_work_handler);
3332         kref_get(&mc->mcref);
3333         queue_work(cma_wq, &work->work);
3334
3335         return 0;
3336
3337 out2:
3338         kfree(mc->multicast.ib);
3339 out1:
3340         kfree(work);
3341         return err;
3342 }
3343
3344 int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
3345                         void *context)
3346 {
3347         struct rdma_id_private *id_priv;
3348         struct cma_multicast *mc;
3349         int ret;
3350
3351         id_priv = container_of(id, struct rdma_id_private, id);
3352         if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) &&
3353             !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED))
3354                 return -EINVAL;
3355
3356         mc = kmalloc(sizeof *mc, GFP_KERNEL);
3357         if (!mc)
3358                 return -ENOMEM;
3359
3360         memcpy(&mc->addr, addr, rdma_addr_size(addr));
3361         mc->context = context;
3362         mc->id_priv = id_priv;
3363
3364         spin_lock(&id_priv->lock);
3365         list_add(&mc->list, &id_priv->mc_list);
3366         spin_unlock(&id_priv->lock);
3367
3368         if (rdma_protocol_roce(id->device, id->port_num)) {
3369                 kref_init(&mc->mcref);
3370                 ret = cma_iboe_join_multicast(id_priv, mc);
3371         } else if (rdma_cap_ib_mcast(id->device, id->port_num))
3372                 ret = cma_join_ib_multicast(id_priv, mc);
3373         else
3374                 ret = -ENOSYS;
3375
3376         if (ret) {
3377                 spin_lock_irq(&id_priv->lock);
3378                 list_del(&mc->list);
3379                 spin_unlock_irq(&id_priv->lock);
3380                 kfree(mc);
3381         }
3382         return ret;
3383 }
3384 EXPORT_SYMBOL(rdma_join_multicast);
3385
3386 void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
3387 {
3388         struct rdma_id_private *id_priv;
3389         struct cma_multicast *mc;
3390
3391         id_priv = container_of(id, struct rdma_id_private, id);
3392         spin_lock_irq(&id_priv->lock);
3393         list_for_each_entry(mc, &id_priv->mc_list, list) {
3394                 if (!memcmp(&mc->addr, addr, rdma_addr_size(addr))) {
3395                         list_del(&mc->list);
3396                         spin_unlock_irq(&id_priv->lock);
3397
3398                         if (id->qp)
3399                                 ib_detach_mcast(id->qp,
3400                                                 &mc->multicast.ib->rec.mgid,
3401                                                 be16_to_cpu(mc->multicast.ib->rec.mlid));
3402
3403                         BUG_ON(id_priv->cma_dev->device != id->device);
3404
3405                         if (rdma_cap_ib_mcast(id->device, id->port_num)) {
3406                                 ib_sa_free_multicast(mc->multicast.ib);
3407                                 kfree(mc);
3408                         } else if (rdma_protocol_roce(id->device, id->port_num))
3409                                 kref_put(&mc->mcref, release_mc);
3410
3411                         return;
3412                 }
3413         }
3414         spin_unlock_irq(&id_priv->lock);
3415 }
3416 EXPORT_SYMBOL(rdma_leave_multicast);
3417
3418 static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
3419 {
3420         struct rdma_dev_addr *dev_addr;
3421         struct cma_ndev_work *work;
3422
3423         dev_addr = &id_priv->id.route.addr.dev_addr;
3424
3425         if ((dev_addr->bound_dev_if == ndev->ifindex) &&
3426             memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
3427                 printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n",
3428                        ndev->name, &id_priv->id);
3429                 work = kzalloc(sizeof *work, GFP_KERNEL);
3430                 if (!work)
3431                         return -ENOMEM;
3432
3433                 INIT_WORK(&work->work, cma_ndev_work_handler);
3434                 work->id = id_priv;
3435                 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
3436                 atomic_inc(&id_priv->refcount);
3437                 queue_work(cma_wq, &work->work);
3438         }
3439
3440         return 0;
3441 }
3442
3443 static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
3444                                void *ptr)
3445 {
3446         struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
3447         struct cma_device *cma_dev;
3448         struct rdma_id_private *id_priv;
3449         int ret = NOTIFY_DONE;
3450
3451         if (dev_net(ndev) != &init_net)
3452                 return NOTIFY_DONE;
3453
3454         if (event != NETDEV_BONDING_FAILOVER)
3455                 return NOTIFY_DONE;
3456
3457         if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING))
3458                 return NOTIFY_DONE;
3459
3460         mutex_lock(&lock);
3461         list_for_each_entry(cma_dev, &dev_list, list)
3462                 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3463                         ret = cma_netdev_change(ndev, id_priv);
3464                         if (ret)
3465                                 goto out;
3466                 }
3467
3468 out:
3469         mutex_unlock(&lock);
3470         return ret;
3471 }
3472
3473 static struct notifier_block cma_nb = {
3474         .notifier_call = cma_netdev_callback
3475 };
3476
3477 static void cma_add_one(struct ib_device *device)
3478 {
3479         struct cma_device *cma_dev;
3480         struct rdma_id_private *id_priv;
3481
3482         cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
3483         if (!cma_dev)
3484                 return;
3485
3486         cma_dev->device = device;
3487
3488         init_completion(&cma_dev->comp);
3489         atomic_set(&cma_dev->refcount, 1);
3490         INIT_LIST_HEAD(&cma_dev->id_list);
3491         ib_set_client_data(device, &cma_client, cma_dev);
3492
3493         mutex_lock(&lock);
3494         list_add_tail(&cma_dev->list, &dev_list);
3495         list_for_each_entry(id_priv, &listen_any_list, list)
3496                 cma_listen_on_dev(id_priv, cma_dev);
3497         mutex_unlock(&lock);
3498 }
3499
3500 static int cma_remove_id_dev(struct rdma_id_private *id_priv)
3501 {
3502         struct rdma_cm_event event;
3503         enum rdma_cm_state state;
3504         int ret = 0;
3505
3506         /* Record that we want to remove the device */
3507         state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL);
3508         if (state == RDMA_CM_DESTROYING)
3509                 return 0;
3510
3511         cma_cancel_operation(id_priv, state);
3512         mutex_lock(&id_priv->handler_mutex);
3513
3514         /* Check for destruction from another callback. */
3515         if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL))
3516                 goto out;
3517
3518         memset(&event, 0, sizeof event);
3519         event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
3520         ret = id_priv->id.event_handler(&id_priv->id, &event);
3521 out:
3522         mutex_unlock(&id_priv->handler_mutex);
3523         return ret;
3524 }
3525
3526 static void cma_process_remove(struct cma_device *cma_dev)
3527 {
3528         struct rdma_id_private *id_priv;
3529         int ret;
3530
3531         mutex_lock(&lock);
3532         while (!list_empty(&cma_dev->id_list)) {
3533                 id_priv = list_entry(cma_dev->id_list.next,
3534                                      struct rdma_id_private, list);
3535
3536                 list_del(&id_priv->listen_list);
3537                 list_del_init(&id_priv->list);
3538                 atomic_inc(&id_priv->refcount);
3539                 mutex_unlock(&lock);
3540
3541                 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
3542                 cma_deref_id(id_priv);
3543                 if (ret)
3544                         rdma_destroy_id(&id_priv->id);
3545
3546                 mutex_lock(&lock);
3547         }
3548         mutex_unlock(&lock);
3549
3550         cma_deref_dev(cma_dev);
3551         wait_for_completion(&cma_dev->comp);
3552 }
3553
3554 static void cma_remove_one(struct ib_device *device)
3555 {
3556         struct cma_device *cma_dev;
3557
3558         cma_dev = ib_get_client_data(device, &cma_client);
3559         if (!cma_dev)
3560                 return;
3561
3562         mutex_lock(&lock);
3563         list_del(&cma_dev->list);
3564         mutex_unlock(&lock);
3565
3566         cma_process_remove(cma_dev);
3567         kfree(cma_dev);
3568 }
3569
3570 static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb)
3571 {
3572         struct nlmsghdr *nlh;
3573         struct rdma_cm_id_stats *id_stats;
3574         struct rdma_id_private *id_priv;
3575         struct rdma_cm_id *id = NULL;
3576         struct cma_device *cma_dev;
3577         int i_dev = 0, i_id = 0;
3578
3579         /*
3580          * We export all of the IDs as a sequence of messages.  Each
3581          * ID gets its own netlink message.
3582          */
3583         mutex_lock(&lock);
3584
3585         list_for_each_entry(cma_dev, &dev_list, list) {
3586                 if (i_dev < cb->args[0]) {
3587                         i_dev++;
3588                         continue;
3589                 }
3590
3591                 i_id = 0;
3592                 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3593                         if (i_id < cb->args[1]) {
3594                                 i_id++;
3595                                 continue;
3596                         }
3597
3598                         id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq,
3599                                                 sizeof *id_stats, RDMA_NL_RDMA_CM,
3600                                                 RDMA_NL_RDMA_CM_ID_STATS,
3601                                                 NLM_F_MULTI);
3602                         if (!id_stats)
3603                                 goto out;
3604
3605                         memset(id_stats, 0, sizeof *id_stats);
3606                         id = &id_priv->id;
3607                         id_stats->node_type = id->route.addr.dev_addr.dev_type;
3608                         id_stats->port_num = id->port_num;
3609                         id_stats->bound_dev_if =
3610                                 id->route.addr.dev_addr.bound_dev_if;
3611
3612                         if (ibnl_put_attr(skb, nlh,
3613                                           rdma_addr_size(cma_src_addr(id_priv)),
3614                                           cma_src_addr(id_priv),
3615                                           RDMA_NL_RDMA_CM_ATTR_SRC_ADDR))
3616                                 goto out;
3617                         if (ibnl_put_attr(skb, nlh,
3618                                           rdma_addr_size(cma_src_addr(id_priv)),
3619                                           cma_dst_addr(id_priv),
3620                                           RDMA_NL_RDMA_CM_ATTR_DST_ADDR))
3621                                 goto out;
3622
3623                         id_stats->pid           = id_priv->owner;
3624                         id_stats->port_space    = id->ps;
3625                         id_stats->cm_state      = id_priv->state;
3626                         id_stats->qp_num        = id_priv->qp_num;
3627                         id_stats->qp_type       = id->qp_type;
3628
3629                         i_id++;
3630                 }
3631
3632                 cb->args[1] = 0;
3633                 i_dev++;
3634         }
3635
3636 out:
3637         mutex_unlock(&lock);
3638         cb->args[0] = i_dev;
3639         cb->args[1] = i_id;
3640
3641         return skb->len;
3642 }
3643
3644 static const struct ibnl_client_cbs cma_cb_table[] = {
3645         [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats,
3646                                        .module = THIS_MODULE },
3647 };
3648
3649 static int __init cma_init(void)
3650 {
3651         int ret;
3652
3653         cma_wq = create_singlethread_workqueue("rdma_cm");
3654         if (!cma_wq)
3655                 return -ENOMEM;
3656
3657         ib_sa_register_client(&sa_client);
3658         rdma_addr_register_client(&addr_client);
3659         register_netdevice_notifier(&cma_nb);
3660
3661         ret = ib_register_client(&cma_client);
3662         if (ret)
3663                 goto err;
3664
3665         if (ibnl_add_client(RDMA_NL_RDMA_CM, RDMA_NL_RDMA_CM_NUM_OPS, cma_cb_table))
3666                 printk(KERN_WARNING "RDMA CMA: failed to add netlink callback\n");
3667
3668         return 0;
3669
3670 err:
3671         unregister_netdevice_notifier(&cma_nb);
3672         rdma_addr_unregister_client(&addr_client);
3673         ib_sa_unregister_client(&sa_client);
3674         destroy_workqueue(cma_wq);
3675         return ret;
3676 }
3677
3678 static void __exit cma_cleanup(void)
3679 {
3680         ibnl_remove_client(RDMA_NL_RDMA_CM);
3681         ib_unregister_client(&cma_client);
3682         unregister_netdevice_notifier(&cma_nb);
3683         rdma_addr_unregister_client(&addr_client);
3684         ib_sa_unregister_client(&sa_client);
3685         destroy_workqueue(cma_wq);
3686         idr_destroy(&tcp_ps);
3687         idr_destroy(&udp_ps);
3688         idr_destroy(&ipoib_ps);
3689         idr_destroy(&ib_ps);
3690 }
3691
3692 module_init(cma_init);
3693 module_exit(cma_cleanup);