drivers/infiniband/core/cma.c

   1 /*
   2  * Copyright (c) 2005 Voltaire Inc.  All rights reserved.
   3  * Copyright (c) 2002-2005, Network Appliance, Inc. All rights reserved.
   4  * Copyright (c) 1999-2005, Mellanox Technologies, Inc. All rights reserved.
   5  * Copyright (c) 2005-2006 Intel Corporation.  All rights reserved.
   6  *
   7  * This software is available to you under a choice of one of two
   8  * licenses.  You may choose to be licensed under the terms of the GNU
   9  * General Public License (GPL) Version 2, available from the file
  10  * COPYING in the main directory of this source tree, or the
  11  * OpenIB.org BSD license below:
  12  *
  13  *     Redistribution and use in source and binary forms, with or
  14  *     without modification, are permitted provided that the following
  15  *     conditions are met:
  16  *
  17  *      - Redistributions of source code must retain the above
  18  *        copyright notice, this list of conditions and the following
  19  *        disclaimer.
  20  *
  21  *      - Redistributions in binary form must reproduce the above
  22  *        copyright notice, this list of conditions and the following
  23  *        disclaimer in the documentation and/or other materials
  24  *        provided with the distribution.
  25  *
  26  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  27  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  28  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  29  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  30  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  31  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  32  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  33  * SOFTWARE.
  34  */
  35
  36 #include <linux/completion.h>
  37 #include <linux/in.h>
  38 #include <linux/in6.h>
  39 #include <linux/mutex.h>
  40 #include <linux/random.h>
  41 #include <linux/idr.h>
  42 #include <linux/inetdevice.h>
  43 #include <linux/slab.h>
  44 #include <linux/module.h>
  45 #include <net/route.h>
  46
  47 #include <net/tcp.h>
  48 #include <net/ipv6.h>
  49
  50 #include <rdma/rdma_cm.h>
  51 #include <rdma/rdma_cm_ib.h>
  52 #include <rdma/rdma_netlink.h>
  53 #include <rdma/ib.h>
  54 #include <rdma/ib_cache.h>
  55 #include <rdma/ib_cm.h>
  56 #include <rdma/ib_sa.h>
  57 #include <rdma/iw_cm.h>
  58
  59 MODULE_AUTHOR("Sean Hefty");
  60 MODULE_DESCRIPTION("Generic RDMA CM Agent");
  61 MODULE_LICENSE("Dual BSD/GPL");
  62
  63 #define CMA_CM_RESPONSE_TIMEOUT 20
  64 #define CMA_MAX_CM_RETRIES 15
  65 #define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
  66 #define CMA_IBOE_PACKET_LIFETIME 18
  67
  68 static void cma_add_one(struct ib_device *device);
  69 static void cma_remove_one(struct ib_device *device);
  70
  71 static struct ib_client cma_client = {
  72         .name   = "cma",
  73         .add    = cma_add_one,
  74         .remove = cma_remove_one
  75 };
  76
  77 static struct ib_sa_client sa_client;
  78 static struct rdma_addr_client addr_client;
  79 static LIST_HEAD(dev_list);
  80 static LIST_HEAD(listen_any_list);
  81 static DEFINE_MUTEX(lock);
  82 static struct workqueue_struct *cma_wq;
  83 static DEFINE_IDR(tcp_ps);
  84 static DEFINE_IDR(udp_ps);
  85 static DEFINE_IDR(ipoib_ps);
  86 static DEFINE_IDR(ib_ps);
  87
  88 struct cma_device {
  89         struct list_head        list;
  90         struct ib_device        *device;
  91         struct completion       comp;
  92         atomic_t                refcount;
  93         struct list_head        id_list;
  94 };
  95
  96 struct rdma_bind_list {
  97         struct idr              *ps;
  98         struct hlist_head       owners;
  99         unsigned short          port;
 100 };
 101
 102 enum {
 103         CMA_OPTION_AFONLY,
 104 };
 105
 106 /*
 107  * Device removal can occur at anytime, so we need extra handling to
 108  * serialize notifying the user of device removal with other callbacks.
 109  * We do this by disabling removal notification while a callback is in process,
 110  * and reporting it after the callback completes.
 111  */
 112 struct rdma_id_private {
 113         struct rdma_cm_id       id;
 114
 115         struct rdma_bind_list   *bind_list;
 116         struct hlist_node       node;
 117         struct list_head        list; /* listen_any_list or cma_device.list */
 118         struct list_head        listen_list; /* per device listens */
 119         struct cma_device       *cma_dev;
 120         struct list_head        mc_list;
 121
 122         int                     internal_id;
 123         enum rdma_cm_state      state;
 124         spinlock_t              lock;
 125         struct mutex            qp_mutex;
 126
 127         struct completion       comp;
 128         atomic_t                refcount;
 129         struct mutex            handler_mutex;
 130
 131         int                     backlog;
 132         int                     timeout_ms;
 133         struct ib_sa_query      *query;
 134         int                     query_id;
 135         union {
 136                 struct ib_cm_id *ib;
 137                 struct iw_cm_id *iw;
 138         } cm_id;
 139
 140         u32                     seq_num;
 141         u32                     qkey;
 142         u32                     qp_num;
 143         pid_t                   owner;
 144         u32                     options;
 145         u8                      srq;
 146         u8                      tos;
 147         u8                      reuseaddr;
 148         u8                      afonly;
 149 };
 150
 151 struct cma_multicast {
 152         struct rdma_id_private *id_priv;
 153         union {
 154                 struct ib_sa_multicast *ib;
 155         } multicast;
 156         struct list_head        list;
 157         void                    *context;
 158         struct sockaddr_storage addr;
 159         struct kref             mcref;
 160 };
 161
 162 struct cma_work {
 163         struct work_struct      work;
 164         struct rdma_id_private  *id;
 165         enum rdma_cm_state      old_state;
 166         enum rdma_cm_state      new_state;
 167         struct rdma_cm_event    event;
 168 };
 169
 170 struct cma_ndev_work {
 171         struct work_struct      work;
 172         struct rdma_id_private  *id;
 173         struct rdma_cm_event    event;
 174 };
 175
 176 struct iboe_mcast_work {
 177         struct work_struct       work;
 178         struct rdma_id_private  *id;
 179         struct cma_multicast    *mc;
 180 };
 181
 182 union cma_ip_addr {
 183         struct in6_addr ip6;
 184         struct {
 185                 __be32 pad[3];
 186                 __be32 addr;
 187         } ip4;
 188 };
 189
 190 struct cma_hdr {
 191         u8 cma_version;
 192         u8 ip_version;  /* IP version: 7:4 */
 193         __be16 port;
 194         union cma_ip_addr src_addr;
 195         union cma_ip_addr dst_addr;
 196 };
 197
 198 #define CMA_VERSION 0x00
 199
 200 static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp)
 201 {
 202         unsigned long flags;
 203         int ret;
 204
 205         spin_lock_irqsave(&id_priv->lock, flags);
 206         ret = (id_priv->state == comp);
 207         spin_unlock_irqrestore(&id_priv->lock, flags);
 208         return ret;
 209 }
 210
 211 static int cma_comp_exch(struct rdma_id_private *id_priv,
 212                          enum rdma_cm_state comp, enum rdma_cm_state exch)
 213 {
 214         unsigned long flags;
 215         int ret;
 216
 217         spin_lock_irqsave(&id_priv->lock, flags);
 218         if ((ret = (id_priv->state == comp)))
 219                 id_priv->state = exch;
 220         spin_unlock_irqrestore(&id_priv->lock, flags);
 221         return ret;
 222 }
 223
 224 static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv,
 225                                    enum rdma_cm_state exch)
 226 {
 227         unsigned long flags;
 228         enum rdma_cm_state old;
 229
 230         spin_lock_irqsave(&id_priv->lock, flags);
 231         old = id_priv->state;
 232         id_priv->state = exch;
 233         spin_unlock_irqrestore(&id_priv->lock, flags);
 234         return old;
 235 }
 236
 237 static inline u8 cma_get_ip_ver(struct cma_hdr *hdr)
 238 {
 239         return hdr->ip_version >> 4;
 240 }
 241
 242 static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
 243 {
 244         hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
 245 }
 246
 247 static void cma_attach_to_dev(struct rdma_id_private *id_priv,
 248                               struct cma_device *cma_dev)
 249 {
 250         atomic_inc(&cma_dev->refcount);
 251         id_priv->cma_dev = cma_dev;
 252         id_priv->id.device = cma_dev->device;
 253         id_priv->id.route.addr.dev_addr.transport =
 254                 rdma_node_get_transport(cma_dev->device->node_type);
 255         list_add_tail(&id_priv->list, &cma_dev->id_list);
 256 }
 257
 258 static inline void cma_deref_dev(struct cma_device *cma_dev)
 259 {
 260         if (atomic_dec_and_test(&cma_dev->refcount))
 261                 complete(&cma_dev->comp);
 262 }
 263
 264 static inline void release_mc(struct kref *kref)
 265 {
 266         struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);
 267
 268         kfree(mc->multicast.ib);
 269         kfree(mc);
 270 }
 271
 272 static void cma_release_dev(struct rdma_id_private *id_priv)
 273 {
 274         mutex_lock(&lock);
 275         list_del(&id_priv->list);
 276         cma_deref_dev(id_priv->cma_dev);
 277         id_priv->cma_dev = NULL;
 278         mutex_unlock(&lock);
 279 }
 280
 281 static inline struct sockaddr *cma_src_addr(struct rdma_id_private *id_priv)
 282 {
 283         return (struct sockaddr *) &id_priv->id.route.addr.src_addr;
 284 }
 285
 286 static inline struct sockaddr *cma_dst_addr(struct rdma_id_private *id_priv)
 287 {
 288         return (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
 289 }
 290
 291 static inline unsigned short cma_family(struct rdma_id_private *id_priv)
 292 {
 293         return id_priv->id.route.addr.src_addr.ss_family;
 294 }
 295
 296 static int cma_set_qkey(struct rdma_id_private *id_priv, u32 qkey)
 297 {
 298         struct ib_sa_mcmember_rec rec;
 299         int ret = 0;
 300
 301         if (id_priv->qkey) {
 302                 if (qkey && id_priv->qkey != qkey)
 303                         return -EINVAL;
 304                 return 0;
 305         }
 306
 307         if (qkey) {
 308                 id_priv->qkey = qkey;
 309                 return 0;
 310         }
 311
 312         switch (id_priv->id.ps) {
 313         case RDMA_PS_UDP:
 314         case RDMA_PS_IB:
 315                 id_priv->qkey = RDMA_UDP_QKEY;
 316                 break;
 317         case RDMA_PS_IPOIB:
 318                 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
 319                 ret = ib_sa_get_mcmember_rec(id_priv->id.device,
 320                                              id_priv->id.port_num, &rec.mgid,
 321                                              &rec);
 322                 if (!ret)
 323                         id_priv->qkey = be32_to_cpu(rec.qkey);
 324                 break;
 325         default:
 326                 break;
 327         }
 328         return ret;
 329 }
 330
 331 static void cma_translate_ib(struct sockaddr_ib *sib, struct rdma_dev_addr *dev_addr)
 332 {
 333         dev_addr->dev_type = ARPHRD_INFINIBAND;
 334         rdma_addr_set_sgid(dev_addr, (union ib_gid *) &sib->sib_addr);
 335         ib_addr_set_pkey(dev_addr, ntohs(sib->sib_pkey));
 336 }
 337
 338 static int cma_translate_addr(struct sockaddr *addr, struct rdma_dev_addr *dev_addr)
 339 {
 340         int ret;
 341
 342         if (addr->sa_family != AF_IB) {
 343                 ret = rdma_translate_ip(addr, dev_addr, NULL);
 344         } else {
 345                 cma_translate_ib((struct sockaddr_ib *) addr, dev_addr);
 346                 ret = 0;
 347         }
 348
 349         return ret;
 350 }
 351
 352 static int cma_acquire_dev(struct rdma_id_private *id_priv,
 353                            struct rdma_id_private *listen_id_priv)
 354 {
 355         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
 356         struct cma_device *cma_dev;
 357         union ib_gid gid, iboe_gid;
 358         int ret = -ENODEV;
 359         u8 port, found_port;
 360         enum rdma_link_layer dev_ll = dev_addr->dev_type == ARPHRD_INFINIBAND ?
 361                 IB_LINK_LAYER_INFINIBAND : IB_LINK_LAYER_ETHERNET;
 362
 363         if (dev_ll != IB_LINK_LAYER_INFINIBAND &&
 364             id_priv->id.ps == RDMA_PS_IPOIB)
 365                 return -EINVAL;
 366
 367         mutex_lock(&lock);
 368         rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
 369                     &iboe_gid);
 370
 371         memcpy(&gid, dev_addr->src_dev_addr +
 372                rdma_addr_gid_offset(dev_addr), sizeof gid);
 373         if (listen_id_priv &&
 374             rdma_port_get_link_layer(listen_id_priv->id.device,
 375                                      listen_id_priv->id.port_num) == dev_ll) {
 376                 cma_dev = listen_id_priv->cma_dev;
 377                 port = listen_id_priv->id.port_num;
 378                 if (rdma_node_get_transport(cma_dev->device->node_type) == RDMA_TRANSPORT_IB &&
 379                     rdma_port_get_link_layer(cma_dev->device, port) == IB_LINK_LAYER_ETHERNET)
 380                         ret = ib_find_cached_gid(cma_dev->device, &iboe_gid,
 381                                                  &found_port, NULL);
 382                 else
 383                         ret = ib_find_cached_gid(cma_dev->device, &gid,
 384                                                  &found_port, NULL);
 385
 386                 if (!ret && (port  == found_port)) {
 387                         id_priv->id.port_num = found_port;
 388                         goto out;
 389                 }
 390         }
 391         list_for_each_entry(cma_dev, &dev_list, list) {
 392                 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
 393                         if (listen_id_priv &&
 394                             listen_id_priv->cma_dev == cma_dev &&
 395                             listen_id_priv->id.port_num == port)
 396                                 continue;
 397                         if (rdma_port_get_link_layer(cma_dev->device, port) == dev_ll) {
 398                                 if (rdma_node_get_transport(cma_dev->device->node_type) == RDMA_TRANSPORT_IB &&
 399                                     rdma_port_get_link_layer(cma_dev->device, port) == IB_LINK_LAYER_ETHERNET)
 400                                         ret = ib_find_cached_gid(cma_dev->device, &iboe_gid, &found_port, NULL);
 401                                 else
 402                                         ret = ib_find_cached_gid(cma_dev->device, &gid, &found_port, NULL);
 403
 404                                 if (!ret && (port == found_port)) {
 405                                         id_priv->id.port_num = found_port;
 406                                         goto out;
 407                                 }
 408                         }
 409                 }
 410         }
 411
 412 out:
 413         if (!ret)
 414                 cma_attach_to_dev(id_priv, cma_dev);
 415
 416         mutex_unlock(&lock);
 417         return ret;
 418 }
 419
 420 /*
 421  * Select the source IB device and address to reach the destination IB address.
 422  */
 423 static int cma_resolve_ib_dev(struct rdma_id_private *id_priv)
 424 {
 425         struct cma_device *cma_dev, *cur_dev;
 426         struct sockaddr_ib *addr;
 427         union ib_gid gid, sgid, *dgid;
 428         u16 pkey, index;
 429         u8 p;
 430         int i;
 431
 432         cma_dev = NULL;
 433         addr = (struct sockaddr_ib *) cma_dst_addr(id_priv);
 434         dgid = (union ib_gid *) &addr->sib_addr;
 435         pkey = ntohs(addr->sib_pkey);
 436
 437         list_for_each_entry(cur_dev, &dev_list, list) {
 438                 if (rdma_node_get_transport(cur_dev->device->node_type) != RDMA_TRANSPORT_IB)
 439                         continue;
 440
 441                 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
 442                         if (ib_find_cached_pkey(cur_dev->device, p, pkey, &index))
 443                                 continue;
 444
 445                         for (i = 0; !ib_get_cached_gid(cur_dev->device, p, i, &gid); i++) {
 446                                 if (!memcmp(&gid, dgid, sizeof(gid))) {
 447                                         cma_dev = cur_dev;
 448                                         sgid = gid;
 449                                         id_priv->id.port_num = p;
 450                                         goto found;
 451                                 }
 452
 453                                 if (!cma_dev && (gid.global.subnet_prefix ==
 454                                                  dgid->global.subnet_prefix)) {
 455                                         cma_dev = cur_dev;
 456                                         sgid = gid;
 457                                         id_priv->id.port_num = p;
 458                                 }
 459                         }
 460                 }
 461         }
 462
 463         if (!cma_dev)
 464                 return -ENODEV;
 465
 466 found:
 467         cma_attach_to_dev(id_priv, cma_dev);
 468         addr = (struct sockaddr_ib *) cma_src_addr(id_priv);
 469         memcpy(&addr->sib_addr, &sgid, sizeof sgid);
 470         cma_translate_ib(addr, &id_priv->id.route.addr.dev_addr);
 471         return 0;
 472 }
 473
 474 static void cma_deref_id(struct rdma_id_private *id_priv)
 475 {
 476         if (atomic_dec_and_test(&id_priv->refcount))
 477                 complete(&id_priv->comp);
 478 }
 479
 480 static int cma_disable_callback(struct rdma_id_private *id_priv,
 481                                 enum rdma_cm_state state)
 482 {
 483         mutex_lock(&id_priv->handler_mutex);
 484         if (id_priv->state != state) {
 485                 mutex_unlock(&id_priv->handler_mutex);
 486                 return -EINVAL;
 487         }
 488         return 0;
 489 }
 490
 491 struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
 492                                   void *context, enum rdma_port_space ps,
 493                                   enum ib_qp_type qp_type)
 494 {
 495         struct rdma_id_private *id_priv;
 496
 497         id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
 498         if (!id_priv)
 499                 return ERR_PTR(-ENOMEM);
 500
 501         id_priv->owner = task_pid_nr(current);
 502         id_priv->state = RDMA_CM_IDLE;
 503         id_priv->id.context = context;
 504         id_priv->id.event_handler = event_handler;
 505         id_priv->id.ps = ps;
 506         id_priv->id.qp_type = qp_type;
 507         spin_lock_init(&id_priv->lock);
 508         mutex_init(&id_priv->qp_mutex);
 509         init_completion(&id_priv->comp);
 510         atomic_set(&id_priv->refcount, 1);
 511         mutex_init(&id_priv->handler_mutex);
 512         INIT_LIST_HEAD(&id_priv->listen_list);
 513         INIT_LIST_HEAD(&id_priv->mc_list);
 514         get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
 515
 516         return &id_priv->id;
 517 }
 518 EXPORT_SYMBOL(rdma_create_id);
 519
 520 static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
 521 {
 522         struct ib_qp_attr qp_attr;
 523         int qp_attr_mask, ret;
 524
 525         qp_attr.qp_state = IB_QPS_INIT;
 526         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 527         if (ret)
 528                 return ret;
 529
 530         ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
 531         if (ret)
 532                 return ret;
 533
 534         qp_attr.qp_state = IB_QPS_RTR;
 535         ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
 536         if (ret)
 537                 return ret;
 538
 539         qp_attr.qp_state = IB_QPS_RTS;
 540         qp_attr.sq_psn = 0;
 541         ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
 542
 543         return ret;
 544 }
 545
 546 static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
 547 {
 548         struct ib_qp_attr qp_attr;
 549         int qp_attr_mask, ret;
 550
 551         qp_attr.qp_state = IB_QPS_INIT;
 552         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 553         if (ret)
 554                 return ret;
 555
 556         return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
 557 }
 558
 559 int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
 560                    struct ib_qp_init_attr *qp_init_attr)
 561 {
 562         struct rdma_id_private *id_priv;
 563         struct ib_qp *qp;
 564         int ret;
 565
 566         id_priv = container_of(id, struct rdma_id_private, id);
 567         if (id->device != pd->device)
 568                 return -EINVAL;
 569
 570         qp = ib_create_qp(pd, qp_init_attr);
 571         if (IS_ERR(qp))
 572                 return PTR_ERR(qp);
 573
 574         if (id->qp_type == IB_QPT_UD)
 575                 ret = cma_init_ud_qp(id_priv, qp);
 576         else
 577                 ret = cma_init_conn_qp(id_priv, qp);
 578         if (ret)
 579                 goto err;
 580
 581         id->qp = qp;
 582         id_priv->qp_num = qp->qp_num;
 583         id_priv->srq = (qp->srq != NULL);
 584         return 0;
 585 err:
 586         ib_destroy_qp(qp);
 587         return ret;
 588 }
 589 EXPORT_SYMBOL(rdma_create_qp);
 590
 591 void rdma_destroy_qp(struct rdma_cm_id *id)
 592 {
 593         struct rdma_id_private *id_priv;
 594
 595         id_priv = container_of(id, struct rdma_id_private, id);
 596         mutex_lock(&id_priv->qp_mutex);
 597         ib_destroy_qp(id_priv->id.qp);
 598         id_priv->id.qp = NULL;
 599         mutex_unlock(&id_priv->qp_mutex);
 600 }
 601 EXPORT_SYMBOL(rdma_destroy_qp);
 602
 603 static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
 604                              struct rdma_conn_param *conn_param)
 605 {
 606         struct ib_qp_attr qp_attr;
 607         int qp_attr_mask, ret;
 608         union ib_gid sgid;
 609
 610         mutex_lock(&id_priv->qp_mutex);
 611         if (!id_priv->id.qp) {
 612                 ret = 0;
 613                 goto out;
 614         }
 615
 616         /* Need to update QP attributes from default values. */
 617         qp_attr.qp_state = IB_QPS_INIT;
 618         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 619         if (ret)
 620                 goto out;
 621
 622         ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
 623         if (ret)
 624                 goto out;
 625
 626         qp_attr.qp_state = IB_QPS_RTR;
 627         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 628         if (ret)
 629                 goto out;
 630
 631         ret = ib_query_gid(id_priv->id.device, id_priv->id.port_num,
 632                            qp_attr.ah_attr.grh.sgid_index, &sgid);
 633         if (ret)
 634                 goto out;
 635
 636         if (rdma_node_get_transport(id_priv->cma_dev->device->node_type)
 637             == RDMA_TRANSPORT_IB &&
 638             rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num)
 639             == IB_LINK_LAYER_ETHERNET) {
 640                 ret = rdma_addr_find_smac_by_sgid(&sgid, qp_attr.smac, NULL);
 641
 642                 if (ret)
 643                         goto out;
 644         }
 645         if (conn_param)
 646                 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
 647         ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
 648 out:
 649         mutex_unlock(&id_priv->qp_mutex);
 650         return ret;
 651 }
 652
 653 static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
 654                              struct rdma_conn_param *conn_param)
 655 {
 656         struct ib_qp_attr qp_attr;
 657         int qp_attr_mask, ret;
 658
 659         mutex_lock(&id_priv->qp_mutex);
 660         if (!id_priv->id.qp) {
 661                 ret = 0;
 662                 goto out;
 663         }
 664
 665         qp_attr.qp_state = IB_QPS_RTS;
 666         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 667         if (ret)
 668                 goto out;
 669
 670         if (conn_param)
 671                 qp_attr.max_rd_atomic = conn_param->initiator_depth;
 672         ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
 673 out:
 674         mutex_unlock(&id_priv->qp_mutex);
 675         return ret;
 676 }
 677
 678 static int cma_modify_qp_err(struct rdma_id_private *id_priv)
 679 {
 680         struct ib_qp_attr qp_attr;
 681         int ret;
 682
 683         mutex_lock(&id_priv->qp_mutex);
 684         if (!id_priv->id.qp) {
 685                 ret = 0;
 686                 goto out;
 687         }
 688
 689         qp_attr.qp_state = IB_QPS_ERR;
 690         ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
 691 out:
 692         mutex_unlock(&id_priv->qp_mutex);
 693         return ret;
 694 }
 695
 696 static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
 697                                struct ib_qp_attr *qp_attr, int *qp_attr_mask)
 698 {
 699         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
 700         int ret;
 701         u16 pkey;
 702
 703         if (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num) ==
 704             IB_LINK_LAYER_INFINIBAND)
 705                 pkey = ib_addr_get_pkey(dev_addr);
 706         else
 707                 pkey = 0xffff;
 708
 709         ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
 710                                   pkey, &qp_attr->pkey_index);
 711         if (ret)
 712                 return ret;
 713
 714         qp_attr->port_num = id_priv->id.port_num;
 715         *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
 716
 717         if (id_priv->id.qp_type == IB_QPT_UD) {
 718                 ret = cma_set_qkey(id_priv, 0);
 719                 if (ret)
 720                         return ret;
 721
 722                 qp_attr->qkey = id_priv->qkey;
 723                 *qp_attr_mask |= IB_QP_QKEY;
 724         } else {
 725                 qp_attr->qp_access_flags = 0;
 726                 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
 727         }
 728         return 0;
 729 }
 730
 731 int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
 732                        int *qp_attr_mask)
 733 {
 734         struct rdma_id_private *id_priv;
 735         int ret = 0;
 736
 737         id_priv = container_of(id, struct rdma_id_private, id);
 738         switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
 739         case RDMA_TRANSPORT_IB:
 740                 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD))
 741                         ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
 742                 else
 743                         ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
 744                                                  qp_attr_mask);
 745
 746                 if (qp_attr->qp_state == IB_QPS_RTR)
 747                         qp_attr->rq_psn = id_priv->seq_num;
 748                 break;
 749         case RDMA_TRANSPORT_IWARP:
 750                 if (!id_priv->cm_id.iw) {
 751                         qp_attr->qp_access_flags = 0;
 752                         *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
 753                 } else
 754                         ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
 755                                                  qp_attr_mask);
 756                 break;
 757         default:
 758                 ret = -ENOSYS;
 759                 break;
 760         }
 761
 762         return ret;
 763 }
 764 EXPORT_SYMBOL(rdma_init_qp_attr);
 765
 766 static inline int cma_zero_addr(struct sockaddr *addr)
 767 {
 768         switch (addr->sa_family) {
 769         case AF_INET:
 770                 return ipv4_is_zeronet(((struct sockaddr_in *)addr)->sin_addr.s_addr);
 771         case AF_INET6:
 772                 return ipv6_addr_any(&((struct sockaddr_in6 *) addr)->sin6_addr);
 773         case AF_IB:
 774                 return ib_addr_any(&((struct sockaddr_ib *) addr)->sib_addr);
 775         default:
 776                 return 0;
 777         }
 778 }
 779
 780 static inline int cma_loopback_addr(struct sockaddr *addr)
 781 {
 782         switch (addr->sa_family) {
 783         case AF_INET:
 784                 return ipv4_is_loopback(((struct sockaddr_in *) addr)->sin_addr.s_addr);
 785         case AF_INET6:
 786                 return ipv6_addr_loopback(&((struct sockaddr_in6 *) addr)->sin6_addr);
 787         case AF_IB:
 788                 return ib_addr_loopback(&((struct sockaddr_ib *) addr)->sib_addr);
 789         default:
 790                 return 0;
 791         }
 792 }
 793
 794 static inline int cma_any_addr(struct sockaddr *addr)
 795 {
 796         return cma_zero_addr(addr) || cma_loopback_addr(addr);
 797 }
 798
 799 static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst)
 800 {
 801         if (src->sa_family != dst->sa_family)
 802                 return -1;
 803
 804         switch (src->sa_family) {
 805         case AF_INET:
 806                 return ((struct sockaddr_in *) src)->sin_addr.s_addr !=
 807                        ((struct sockaddr_in *) dst)->sin_addr.s_addr;
 808         case AF_INET6:
 809                 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr,
 810                                      &((struct sockaddr_in6 *) dst)->sin6_addr);
 811         default:
 812                 return ib_addr_cmp(&((struct sockaddr_ib *) src)->sib_addr,
 813                                    &((struct sockaddr_ib *) dst)->sib_addr);
 814         }
 815 }
 816
 817 static __be16 cma_port(struct sockaddr *addr)
 818 {
 819         struct sockaddr_ib *sib;
 820
 821         switch (addr->sa_family) {
 822         case AF_INET:
 823                 return ((struct sockaddr_in *) addr)->sin_port;
 824         case AF_INET6:
 825                 return ((struct sockaddr_in6 *) addr)->sin6_port;
 826         case AF_IB:
 827                 sib = (struct sockaddr_ib *) addr;
 828                 return htons((u16) (be64_to_cpu(sib->sib_sid) &
 829                                     be64_to_cpu(sib->sib_sid_mask)));
 830         default:
 831                 return 0;
 832         }
 833 }
 834
 835 static inline int cma_any_port(struct sockaddr *addr)
 836 {
 837         return !cma_port(addr);
 838 }
 839
 840 static void cma_save_ib_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id,
 841                              struct ib_sa_path_rec *path)
 842 {
 843         struct sockaddr_ib *listen_ib, *ib;
 844
 845         listen_ib = (struct sockaddr_ib *) &listen_id->route.addr.src_addr;
 846         ib = (struct sockaddr_ib *) &id->route.addr.src_addr;
 847         ib->sib_family = listen_ib->sib_family;
 848         ib->sib_pkey = path->pkey;
 849         ib->sib_flowinfo = path->flow_label;
 850         memcpy(&ib->sib_addr, &path->sgid, 16);
 851         ib->sib_sid = listen_ib->sib_sid;
 852         ib->sib_sid_mask = cpu_to_be64(0xffffffffffffffffULL);
 853         ib->sib_scope_id = listen_ib->sib_scope_id;
 854
 855         ib = (struct sockaddr_ib *) &id->route.addr.dst_addr;
 856         ib->sib_family = listen_ib->sib_family;
 857         ib->sib_pkey = path->pkey;
 858         ib->sib_flowinfo = path->flow_label;
 859         memcpy(&ib->sib_addr, &path->dgid, 16);
 860 }
 861
 862 static __be16 ss_get_port(const struct sockaddr_storage *ss)
 863 {
 864         if (ss->ss_family == AF_INET)
 865                 return ((struct sockaddr_in *)ss)->sin_port;
 866         else if (ss->ss_family == AF_INET6)
 867                 return ((struct sockaddr_in6 *)ss)->sin6_port;
 868         BUG();
 869 }
 870
 871 static void cma_save_ip4_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id,
 872                               struct cma_hdr *hdr)
 873 {
 874         struct sockaddr_in *ip4;
 875
 876         ip4 = (struct sockaddr_in *) &id->route.addr.src_addr;
 877         ip4->sin_family = AF_INET;
 878         ip4->sin_addr.s_addr = hdr->dst_addr.ip4.addr;
 879         ip4->sin_port = ss_get_port(&listen_id->route.addr.src_addr);
 880
 881         ip4 = (struct sockaddr_in *) &id->route.addr.dst_addr;
 882         ip4->sin_family = AF_INET;
 883         ip4->sin_addr.s_addr = hdr->src_addr.ip4.addr;
 884         ip4->sin_port = hdr->port;
 885 }
 886
 887 static void cma_save_ip6_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id,
 888                               struct cma_hdr *hdr)
 889 {
 890         struct sockaddr_in6 *ip6;
 891
 892         ip6 = (struct sockaddr_in6 *) &id->route.addr.src_addr;
 893         ip6->sin6_family = AF_INET6;
 894         ip6->sin6_addr = hdr->dst_addr.ip6;
 895         ip6->sin6_port = ss_get_port(&listen_id->route.addr.src_addr);
 896
 897         ip6 = (struct sockaddr_in6 *) &id->route.addr.dst_addr;
 898         ip6->sin6_family = AF_INET6;
 899         ip6->sin6_addr = hdr->src_addr.ip6;
 900         ip6->sin6_port = hdr->port;
 901 }
 902
 903 static int cma_save_net_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id,
 904                              struct ib_cm_event *ib_event)
 905 {
 906         struct cma_hdr *hdr;
 907
 908         if ((listen_id->route.addr.src_addr.ss_family == AF_IB) &&
 909             (ib_event->event == IB_CM_REQ_RECEIVED)) {
 910                 cma_save_ib_info(id, listen_id, ib_event->param.req_rcvd.primary_path);
 911                 return 0;
 912         }
 913
 914         hdr = ib_event->private_data;
 915         if (hdr->cma_version != CMA_VERSION)
 916                 return -EINVAL;
 917
 918         switch (cma_get_ip_ver(hdr)) {
 919         case 4:
 920                 cma_save_ip4_info(id, listen_id, hdr);
 921                 break;
 922         case 6:
 923                 cma_save_ip6_info(id, listen_id, hdr);
 924                 break;
 925         default:
 926                 return -EINVAL;
 927         }
 928         return 0;
 929 }
 930
 931 static inline int cma_user_data_offset(struct rdma_id_private *id_priv)
 932 {
 933         return cma_family(id_priv) == AF_IB ? 0 : sizeof(struct cma_hdr);
 934 }
 935
 936 static void cma_cancel_route(struct rdma_id_private *id_priv)
 937 {
 938         switch (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num)) {
 939         case IB_LINK_LAYER_INFINIBAND:
 940                 if (id_priv->query)
 941                         ib_sa_cancel_query(id_priv->query_id, id_priv->query);
 942                 break;
 943         default:
 944                 break;
 945         }
 946 }
 947
 948 static void cma_cancel_listens(struct rdma_id_private *id_priv)
 949 {
 950         struct rdma_id_private *dev_id_priv;
 951
 952         /*
 953          * Remove from listen_any_list to prevent added devices from spawning
 954          * additional listen requests.
 955          */
 956         mutex_lock(&lock);
 957         list_del(&id_priv->list);
 958
 959         while (!list_empty(&id_priv->listen_list)) {
 960                 dev_id_priv = list_entry(id_priv->listen_list.next,
 961                                          struct rdma_id_private, listen_list);
 962                 /* sync with device removal to avoid duplicate destruction */
 963                 list_del_init(&dev_id_priv->list);
 964                 list_del(&dev_id_priv->listen_list);
 965                 mutex_unlock(&lock);
 966
 967                 rdma_destroy_id(&dev_id_priv->id);
 968                 mutex_lock(&lock);
 969         }
 970         mutex_unlock(&lock);
 971 }
 972
 973 static void cma_cancel_operation(struct rdma_id_private *id_priv,
 974                                  enum rdma_cm_state state)
 975 {
 976         switch (state) {
 977         case RDMA_CM_ADDR_QUERY:
 978                 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
 979                 break;
 980         case RDMA_CM_ROUTE_QUERY:
 981                 cma_cancel_route(id_priv);
 982                 break;
 983         case RDMA_CM_LISTEN:
 984                 if (cma_any_addr(cma_src_addr(id_priv)) && !id_priv->cma_dev)
 985                         cma_cancel_listens(id_priv);
 986                 break;
 987         default:
 988                 break;
 989         }
 990 }
 991
 992 static void cma_release_port(struct rdma_id_private *id_priv)
 993 {
 994         struct rdma_bind_list *bind_list = id_priv->bind_list;
 995
 996         if (!bind_list)
 997                 return;
 998
 999         mutex_lock(&lock);
1000         hlist_del(&id_priv->node);
1001         if (hlist_empty(&bind_list->owners)) {
1002                 idr_remove(bind_list->ps, bind_list->port);
1003                 kfree(bind_list);
1004         }
1005         mutex_unlock(&lock);
1006 }
1007
1008 static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
1009 {
1010         struct cma_multicast *mc;
1011
1012         while (!list_empty(&id_priv->mc_list)) {
1013                 mc = container_of(id_priv->mc_list.next,
1014                                   struct cma_multicast, list);
1015                 list_del(&mc->list);
1016                 switch (rdma_port_get_link_layer(id_priv->cma_dev->device, id_priv->id.port_num)) {
1017                 case IB_LINK_LAYER_INFINIBAND:
1018                         ib_sa_free_multicast(mc->multicast.ib);
1019                         kfree(mc);
1020                         break;
1021                 case IB_LINK_LAYER_ETHERNET:
1022                         kref_put(&mc->mcref, release_mc);
1023                         break;
1024                 default:
1025                         break;
1026                 }
1027         }
1028 }
1029
1030 void rdma_destroy_id(struct rdma_cm_id *id)
1031 {
1032         struct rdma_id_private *id_priv;
1033         enum rdma_cm_state state;
1034
1035         id_priv = container_of(id, struct rdma_id_private, id);
1036         state = cma_exch(id_priv, RDMA_CM_DESTROYING);
1037         cma_cancel_operation(id_priv, state);
1038
1039         /*
1040          * Wait for any active callback to finish.  New callbacks will find
1041          * the id_priv state set to destroying and abort.
1042          */
1043         mutex_lock(&id_priv->handler_mutex);
1044         mutex_unlock(&id_priv->handler_mutex);
1045
1046         if (id_priv->cma_dev) {
1047                 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
1048                 case RDMA_TRANSPORT_IB:
1049                         if (id_priv->cm_id.ib)
1050                                 ib_destroy_cm_id(id_priv->cm_id.ib);
1051                         break;
1052                 case RDMA_TRANSPORT_IWARP:
1053                         if (id_priv->cm_id.iw)
1054                                 iw_destroy_cm_id(id_priv->cm_id.iw);
1055                         break;
1056                 default:
1057                         break;
1058                 }
1059                 cma_leave_mc_groups(id_priv);
1060                 cma_release_dev(id_priv);
1061         }
1062
1063         cma_release_port(id_priv);
1064         cma_deref_id(id_priv);
1065         wait_for_completion(&id_priv->comp);
1066
1067         if (id_priv->internal_id)
1068                 cma_deref_id(id_priv->id.context);
1069
1070         kfree(id_priv->id.route.path_rec);
1071         kfree(id_priv);
1072 }
1073 EXPORT_SYMBOL(rdma_destroy_id);
1074
1075 static int cma_rep_recv(struct rdma_id_private *id_priv)
1076 {
1077         int ret;
1078
1079         ret = cma_modify_qp_rtr(id_priv, NULL);
1080         if (ret)
1081                 goto reject;
1082
1083         ret = cma_modify_qp_rts(id_priv, NULL);
1084         if (ret)
1085                 goto reject;
1086
1087         ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
1088         if (ret)
1089                 goto reject;
1090
1091         return 0;
1092 reject:
1093         cma_modify_qp_err(id_priv);
1094         ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
1095                        NULL, 0, NULL, 0);
1096         return ret;
1097 }
1098
1099 static void cma_set_rep_event_data(struct rdma_cm_event *event,
1100                                    struct ib_cm_rep_event_param *rep_data,
1101                                    void *private_data)
1102 {
1103         event->param.conn.private_data = private_data;
1104         event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
1105         event->param.conn.responder_resources = rep_data->responder_resources;
1106         event->param.conn.initiator_depth = rep_data->initiator_depth;
1107         event->param.conn.flow_control = rep_data->flow_control;
1108         event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
1109         event->param.conn.srq = rep_data->srq;
1110         event->param.conn.qp_num = rep_data->remote_qpn;
1111 }
1112
1113 static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1114 {
1115         struct rdma_id_private *id_priv = cm_id->context;
1116         struct rdma_cm_event event;
1117         int ret = 0;
1118
1119         if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
1120                 cma_disable_callback(id_priv, RDMA_CM_CONNECT)) ||
1121             (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
1122                 cma_disable_callback(id_priv, RDMA_CM_DISCONNECT)))
1123                 return 0;
1124
1125         memset(&event, 0, sizeof event);
1126         switch (ib_event->event) {
1127         case IB_CM_REQ_ERROR:
1128         case IB_CM_REP_ERROR:
1129                 event.event = RDMA_CM_EVENT_UNREACHABLE;
1130                 event.status = -ETIMEDOUT;
1131                 break;
1132         case IB_CM_REP_RECEIVED:
1133                 if (id_priv->id.qp) {
1134                         event.status = cma_rep_recv(id_priv);
1135                         event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
1136                                                      RDMA_CM_EVENT_ESTABLISHED;
1137                 } else {
1138                         event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
1139                 }
1140                 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
1141                                        ib_event->private_data);
1142                 break;
1143         case IB_CM_RTU_RECEIVED:
1144         case IB_CM_USER_ESTABLISHED:
1145                 event.event = RDMA_CM_EVENT_ESTABLISHED;
1146                 break;
1147         case IB_CM_DREQ_ERROR:
1148                 event.status = -ETIMEDOUT; /* fall through */
1149         case IB_CM_DREQ_RECEIVED:
1150         case IB_CM_DREP_RECEIVED:
1151                 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT,
1152                                    RDMA_CM_DISCONNECT))
1153                         goto out;
1154                 event.event = RDMA_CM_EVENT_DISCONNECTED;
1155                 break;
1156         case IB_CM_TIMEWAIT_EXIT:
1157                 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
1158                 break;
1159         case IB_CM_MRA_RECEIVED:
1160                 /* ignore event */
1161                 goto out;
1162         case IB_CM_REJ_RECEIVED:
1163                 cma_modify_qp_err(id_priv);
1164                 event.status = ib_event->param.rej_rcvd.reason;
1165                 event.event = RDMA_CM_EVENT_REJECTED;
1166                 event.param.conn.private_data = ib_event->private_data;
1167                 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
1168                 break;
1169         default:
1170                 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
1171                        ib_event->event);
1172                 goto out;
1173         }
1174
1175         ret = id_priv->id.event_handler(&id_priv->id, &event);
1176         if (ret) {
1177                 /* Destroy the CM ID by returning a non-zero value. */
1178                 id_priv->cm_id.ib = NULL;
1179                 cma_exch(id_priv, RDMA_CM_DESTROYING);
1180                 mutex_unlock(&id_priv->handler_mutex);
1181                 rdma_destroy_id(&id_priv->id);
1182                 return ret;
1183         }
1184 out:
1185         mutex_unlock(&id_priv->handler_mutex);
1186         return ret;
1187 }
1188
1189 static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
1190                                                struct ib_cm_event *ib_event)
1191 {
1192         struct rdma_id_private *id_priv;
1193         struct rdma_cm_id *id;
1194         struct rdma_route *rt;
1195         int ret;
1196
1197         id = rdma_create_id(listen_id->event_handler, listen_id->context,
1198                             listen_id->ps, ib_event->param.req_rcvd.qp_type);
1199         if (IS_ERR(id))
1200                 return NULL;
1201
1202         id_priv = container_of(id, struct rdma_id_private, id);
1203         if (cma_save_net_info(id, listen_id, ib_event))
1204                 goto err;
1205
1206         rt = &id->route;
1207         rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
1208         rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
1209                                GFP_KERNEL);
1210         if (!rt->path_rec)
1211                 goto err;
1212
1213         rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
1214         if (rt->num_paths == 2)
1215                 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1216
1217         if (cma_any_addr(cma_src_addr(id_priv))) {
1218                 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
1219                 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
1220                 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
1221         } else {
1222                 ret = cma_translate_addr(cma_src_addr(id_priv), &rt->addr.dev_addr);
1223                 if (ret)
1224                         goto err;
1225         }
1226         rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
1227
1228         id_priv->state = RDMA_CM_CONNECT;
1229         return id_priv;
1230
1231 err:
1232         rdma_destroy_id(id);
1233         return NULL;
1234 }
1235
1236 static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
1237                                               struct ib_cm_event *ib_event)
1238 {
1239         struct rdma_id_private *id_priv;
1240         struct rdma_cm_id *id;
1241         int ret;
1242
1243         id = rdma_create_id(listen_id->event_handler, listen_id->context,
1244                             listen_id->ps, IB_QPT_UD);
1245         if (IS_ERR(id))
1246                 return NULL;
1247
1248         id_priv = container_of(id, struct rdma_id_private, id);
1249         if (cma_save_net_info(id, listen_id, ib_event))
1250                 goto err;
1251
1252         if (!cma_any_addr((struct sockaddr *) &id->route.addr.src_addr)) {
1253                 ret = cma_translate_addr(cma_src_addr(id_priv), &id->route.addr.dev_addr);
1254                 if (ret)
1255                         goto err;
1256         }
1257
1258         id_priv->state = RDMA_CM_CONNECT;
1259         return id_priv;
1260 err:
1261         rdma_destroy_id(id);
1262         return NULL;
1263 }
1264
1265 static void cma_set_req_event_data(struct rdma_cm_event *event,
1266                                    struct ib_cm_req_event_param *req_data,
1267                                    void *private_data, int offset)
1268 {
1269         event->param.conn.private_data = private_data + offset;
1270         event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1271         event->param.conn.responder_resources = req_data->responder_resources;
1272         event->param.conn.initiator_depth = req_data->initiator_depth;
1273         event->param.conn.flow_control = req_data->flow_control;
1274         event->param.conn.retry_count = req_data->retry_count;
1275         event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1276         event->param.conn.srq = req_data->srq;
1277         event->param.conn.qp_num = req_data->remote_qpn;
1278 }
1279
1280 static int cma_check_req_qp_type(struct rdma_cm_id *id, struct ib_cm_event *ib_event)
1281 {
1282         return (((ib_event->event == IB_CM_REQ_RECEIVED) &&
1283                  (ib_event->param.req_rcvd.qp_type == id->qp_type)) ||
1284                 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) &&
1285                  (id->qp_type == IB_QPT_UD)) ||
1286                 (!id->qp_type));
1287 }
1288
1289 static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1290 {
1291         struct rdma_id_private *listen_id, *conn_id;
1292         struct rdma_cm_event event;
1293         int offset, ret;
1294
1295         listen_id = cm_id->context;
1296         if (!cma_check_req_qp_type(&listen_id->id, ib_event))
1297                 return -EINVAL;
1298
1299         if (cma_disable_callback(listen_id, RDMA_CM_LISTEN))
1300                 return -ECONNABORTED;
1301
1302         memset(&event, 0, sizeof event);
1303         offset = cma_user_data_offset(listen_id);
1304         event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1305         if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) {
1306                 conn_id = cma_new_udp_id(&listen_id->id, ib_event);
1307                 event.param.ud.private_data = ib_event->private_data + offset;
1308                 event.param.ud.private_data_len =
1309                                 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1310         } else {
1311                 conn_id = cma_new_conn_id(&listen_id->id, ib_event);
1312                 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1313                                        ib_event->private_data, offset);
1314         }
1315         if (!conn_id) {
1316                 ret = -ENOMEM;
1317                 goto err1;
1318         }
1319
1320         mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
1321         ret = cma_acquire_dev(conn_id, listen_id);
1322         if (ret)
1323                 goto err2;
1324
1325         conn_id->cm_id.ib = cm_id;
1326         cm_id->context = conn_id;
1327         cm_id->cm_handler = cma_ib_handler;
1328
1329         /*
1330          * Protect against the user destroying conn_id from another thread
1331          * until we're done accessing it.
1332          */
1333         atomic_inc(&conn_id->refcount);
1334         ret = conn_id->id.event_handler(&conn_id->id, &event);
1335         if (ret)
1336                 goto err3;
1337         /*
1338          * Acquire mutex to prevent user executing rdma_destroy_id()
1339          * while we're accessing the cm_id.
1340          */
1341         mutex_lock(&lock);
1342         if (cma_comp(conn_id, RDMA_CM_CONNECT) &&
1343             (conn_id->id.qp_type != IB_QPT_UD))
1344                 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1345         mutex_unlock(&lock);
1346         mutex_unlock(&conn_id->handler_mutex);
1347         mutex_unlock(&listen_id->handler_mutex);
1348         cma_deref_id(conn_id);
1349         return 0;
1350
1351 err3:
1352         cma_deref_id(conn_id);
1353         /* Destroy the CM ID by returning a non-zero value. */
1354         conn_id->cm_id.ib = NULL;
1355 err2:
1356         cma_exch(conn_id, RDMA_CM_DESTROYING);
1357         mutex_unlock(&conn_id->handler_mutex);
1358 err1:
1359         mutex_unlock(&listen_id->handler_mutex);
1360         if (conn_id)
1361                 rdma_destroy_id(&conn_id->id);
1362         return ret;
1363 }
1364
1365 __be64 rdma_get_service_id(struct rdma_cm_id *id, struct sockaddr *addr)
1366 {
1367         if (addr->sa_family == AF_IB)
1368                 return ((struct sockaddr_ib *) addr)->sib_sid;
1369
1370         return cpu_to_be64(((u64)id->ps << 16) + be16_to_cpu(cma_port(addr)));
1371 }
1372 EXPORT_SYMBOL(rdma_get_service_id);
1373
1374 static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr,
1375                                  struct ib_cm_compare_data *compare)
1376 {
1377         struct cma_hdr *cma_data, *cma_mask;
1378         __be32 ip4_addr;
1379         struct in6_addr ip6_addr;
1380
1381         memset(compare, 0, sizeof *compare);
1382         cma_data = (void *) compare->data;
1383         cma_mask = (void *) compare->mask;
1384
1385         switch (addr->sa_family) {
1386         case AF_INET:
1387                 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
1388                 cma_set_ip_ver(cma_data, 4);
1389                 cma_set_ip_ver(cma_mask, 0xF);
1390                 if (!cma_any_addr(addr)) {
1391                         cma_data->dst_addr.ip4.addr = ip4_addr;
1392                         cma_mask->dst_addr.ip4.addr = htonl(~0);
1393                 }
1394                 break;
1395         case AF_INET6:
1396                 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr;
1397                 cma_set_ip_ver(cma_data, 6);
1398                 cma_set_ip_ver(cma_mask, 0xF);
1399                 if (!cma_any_addr(addr)) {
1400                         cma_data->dst_addr.ip6 = ip6_addr;
1401                         memset(&cma_mask->dst_addr.ip6, 0xFF,
1402                                sizeof cma_mask->dst_addr.ip6);
1403                 }
1404                 break;
1405         default:
1406                 break;
1407         }
1408 }
1409
1410 static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
1411 {
1412         struct rdma_id_private *id_priv = iw_id->context;
1413         struct rdma_cm_event event;
1414         int ret = 0;
1415         struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
1416         struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
1417
1418         if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
1419                 return 0;
1420
1421         memset(&event, 0, sizeof event);
1422         switch (iw_event->event) {
1423         case IW_CM_EVENT_CLOSE:
1424                 event.event = RDMA_CM_EVENT_DISCONNECTED;
1425                 break;
1426         case IW_CM_EVENT_CONNECT_REPLY:
1427                 memcpy(cma_src_addr(id_priv), laddr,
1428                        rdma_addr_size(laddr));
1429                 memcpy(cma_dst_addr(id_priv), raddr,
1430                        rdma_addr_size(raddr));
1431                 switch (iw_event->status) {
1432                 case 0:
1433                         event.event = RDMA_CM_EVENT_ESTABLISHED;
1434                         event.param.conn.initiator_depth = iw_event->ird;
1435                         event.param.conn.responder_resources = iw_event->ord;
1436                         break;
1437                 case -ECONNRESET:
1438                 case -ECONNREFUSED:
1439                         event.event = RDMA_CM_EVENT_REJECTED;
1440                         break;
1441                 case -ETIMEDOUT:
1442                         event.event = RDMA_CM_EVENT_UNREACHABLE;
1443                         break;
1444                 default:
1445                         event.event = RDMA_CM_EVENT_CONNECT_ERROR;
1446                         break;
1447                 }
1448                 break;
1449         case IW_CM_EVENT_ESTABLISHED:
1450                 event.event = RDMA_CM_EVENT_ESTABLISHED;
1451                 event.param.conn.initiator_depth = iw_event->ird;
1452                 event.param.conn.responder_resources = iw_event->ord;
1453                 break;
1454         default:
1455                 BUG_ON(1);
1456         }
1457
1458         event.status = iw_event->status;
1459         event.param.conn.private_data = iw_event->private_data;
1460         event.param.conn.private_data_len = iw_event->private_data_len;
1461         ret = id_priv->id.event_handler(&id_priv->id, &event);
1462         if (ret) {
1463                 /* Destroy the CM ID by returning a non-zero value. */
1464                 id_priv->cm_id.iw = NULL;
1465                 cma_exch(id_priv, RDMA_CM_DESTROYING);
1466                 mutex_unlock(&id_priv->handler_mutex);
1467                 rdma_destroy_id(&id_priv->id);
1468                 return ret;
1469         }
1470
1471         mutex_unlock(&id_priv->handler_mutex);
1472         return ret;
1473 }
1474
1475 static int iw_conn_req_handler(struct iw_cm_id *cm_id,
1476                                struct iw_cm_event *iw_event)
1477 {
1478         struct rdma_cm_id *new_cm_id;
1479         struct rdma_id_private *listen_id, *conn_id;
1480         struct rdma_cm_event event;
1481         int ret;
1482         struct ib_device_attr attr;
1483         struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
1484         struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
1485
1486         listen_id = cm_id->context;
1487         if (cma_disable_callback(listen_id, RDMA_CM_LISTEN))
1488                 return -ECONNABORTED;
1489
1490         /* Create a new RDMA id for the new IW CM ID */
1491         new_cm_id = rdma_create_id(listen_id->id.event_handler,
1492                                    listen_id->id.context,
1493                                    RDMA_PS_TCP, IB_QPT_RC);
1494         if (IS_ERR(new_cm_id)) {
1495                 ret = -ENOMEM;
1496                 goto out;
1497         }
1498         conn_id = container_of(new_cm_id, struct rdma_id_private, id);
1499         mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
1500         conn_id->state = RDMA_CM_CONNECT;
1501
1502         ret = rdma_translate_ip(laddr, &conn_id->id.route.addr.dev_addr, NULL);
1503         if (ret) {
1504                 mutex_unlock(&conn_id->handler_mutex);
1505                 rdma_destroy_id(new_cm_id);
1506                 goto out;
1507         }
1508
1509         ret = cma_acquire_dev(conn_id, listen_id);
1510         if (ret) {
1511                 mutex_unlock(&conn_id->handler_mutex);
1512                 rdma_destroy_id(new_cm_id);
1513                 goto out;
1514         }
1515
1516         conn_id->cm_id.iw = cm_id;
1517         cm_id->context = conn_id;
1518         cm_id->cm_handler = cma_iw_handler;
1519
1520         memcpy(cma_src_addr(conn_id), laddr, rdma_addr_size(laddr));
1521         memcpy(cma_dst_addr(conn_id), raddr, rdma_addr_size(raddr));
1522
1523         ret = ib_query_device(conn_id->id.device, &attr);
1524         if (ret) {
1525                 mutex_unlock(&conn_id->handler_mutex);
1526                 rdma_destroy_id(new_cm_id);
1527                 goto out;
1528         }
1529
1530         memset(&event, 0, sizeof event);
1531         event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1532         event.param.conn.private_data = iw_event->private_data;
1533         event.param.conn.private_data_len = iw_event->private_data_len;
1534         event.param.conn.initiator_depth = iw_event->ird;
1535         event.param.conn.responder_resources = iw_event->ord;
1536
1537         /*
1538          * Protect against the user destroying conn_id from another thread
1539          * until we're done accessing it.
1540          */
1541         atomic_inc(&conn_id->refcount);
1542         ret = conn_id->id.event_handler(&conn_id->id, &event);
1543         if (ret) {
1544                 /* User wants to destroy the CM ID */
1545                 conn_id->cm_id.iw = NULL;
1546                 cma_exch(conn_id, RDMA_CM_DESTROYING);
1547                 mutex_unlock(&conn_id->handler_mutex);
1548                 cma_deref_id(conn_id);
1549                 rdma_destroy_id(&conn_id->id);
1550                 goto out;
1551         }
1552
1553         mutex_unlock(&conn_id->handler_mutex);
1554         cma_deref_id(conn_id);
1555
1556 out:
1557         mutex_unlock(&listen_id->handler_mutex);
1558         return ret;
1559 }
1560
1561 static int cma_ib_listen(struct rdma_id_private *id_priv)
1562 {
1563         struct ib_cm_compare_data compare_data;
1564         struct sockaddr *addr;
1565         struct ib_cm_id *id;
1566         __be64 svc_id;
1567         int ret;
1568
1569         id = ib_create_cm_id(id_priv->id.device, cma_req_handler, id_priv);
1570         if (IS_ERR(id))
1571                 return PTR_ERR(id);
1572
1573         id_priv->cm_id.ib = id;
1574
1575         addr = cma_src_addr(id_priv);
1576         svc_id = rdma_get_service_id(&id_priv->id, addr);
1577         if (cma_any_addr(addr) && !id_priv->afonly)
1578                 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL);
1579         else {
1580                 cma_set_compare_data(id_priv->id.ps, addr, &compare_data);
1581                 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data);
1582         }
1583
1584         if (ret) {
1585                 ib_destroy_cm_id(id_priv->cm_id.ib);
1586                 id_priv->cm_id.ib = NULL;
1587         }
1588
1589         return ret;
1590 }
1591
1592 static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
1593 {
1594         int ret;
1595         struct iw_cm_id *id;
1596
1597         id = iw_create_cm_id(id_priv->id.device,
1598                              iw_conn_req_handler,
1599                              id_priv);
1600         if (IS_ERR(id))
1601                 return PTR_ERR(id);
1602
1603         id_priv->cm_id.iw = id;
1604
1605         memcpy(&id_priv->cm_id.iw->local_addr, cma_src_addr(id_priv),
1606                rdma_addr_size(cma_src_addr(id_priv)));
1607
1608         ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
1609
1610         if (ret) {
1611                 iw_destroy_cm_id(id_priv->cm_id.iw);
1612                 id_priv->cm_id.iw = NULL;
1613         }
1614
1615         return ret;
1616 }
1617
1618 static int cma_listen_handler(struct rdma_cm_id *id,
1619                               struct rdma_cm_event *event)
1620 {
1621         struct rdma_id_private *id_priv = id->context;
1622
1623         id->context = id_priv->id.context;
1624         id->event_handler = id_priv->id.event_handler;
1625         return id_priv->id.event_handler(id, event);
1626 }
1627
1628 static void cma_listen_on_dev(struct rdma_id_private *id_priv,
1629                               struct cma_device *cma_dev)
1630 {
1631         struct rdma_id_private *dev_id_priv;
1632         struct rdma_cm_id *id;
1633         int ret;
1634
1635         if (cma_family(id_priv) == AF_IB &&
1636             rdma_node_get_transport(cma_dev->device->node_type) != RDMA_TRANSPORT_IB)
1637                 return;
1638
1639         id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps,
1640                             id_priv->id.qp_type);
1641         if (IS_ERR(id))
1642                 return;
1643
1644         dev_id_priv = container_of(id, struct rdma_id_private, id);
1645
1646         dev_id_priv->state = RDMA_CM_ADDR_BOUND;
1647         memcpy(cma_src_addr(dev_id_priv), cma_src_addr(id_priv),
1648                rdma_addr_size(cma_src_addr(id_priv)));
1649
1650         cma_attach_to_dev(dev_id_priv, cma_dev);
1651         list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
1652         atomic_inc(&id_priv->refcount);
1653         dev_id_priv->internal_id = 1;
1654         dev_id_priv->afonly = id_priv->afonly;
1655
1656         ret = rdma_listen(id, id_priv->backlog);
1657         if (ret)
1658                 printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, "
1659                        "listening on device %s\n", ret, cma_dev->device->name);
1660 }
1661
1662 static void cma_listen_on_all(struct rdma_id_private *id_priv)
1663 {
1664         struct cma_device *cma_dev;
1665
1666         mutex_lock(&lock);
1667         list_add_tail(&id_priv->list, &listen_any_list);
1668         list_for_each_entry(cma_dev, &dev_list, list)
1669                 cma_listen_on_dev(id_priv, cma_dev);
1670         mutex_unlock(&lock);
1671 }
1672
1673 void rdma_set_service_type(struct rdma_cm_id *id, int tos)
1674 {
1675         struct rdma_id_private *id_priv;
1676
1677         id_priv = container_of(id, struct rdma_id_private, id);
1678         id_priv->tos = (u8) tos;
1679 }
1680 EXPORT_SYMBOL(rdma_set_service_type);
1681
1682 static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
1683                               void *context)
1684 {
1685         struct cma_work *work = context;
1686         struct rdma_route *route;
1687
1688         route = &work->id->id.route;
1689
1690         if (!status) {
1691                 route->num_paths = 1;
1692                 *route->path_rec = *path_rec;
1693         } else {
1694                 work->old_state = RDMA_CM_ROUTE_QUERY;
1695                 work->new_state = RDMA_CM_ADDR_RESOLVED;
1696                 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
1697                 work->event.status = status;
1698         }
1699
1700         queue_work(cma_wq, &work->work);
1701 }
1702
1703 static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
1704                               struct cma_work *work)
1705 {
1706         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
1707         struct ib_sa_path_rec path_rec;
1708         ib_sa_comp_mask comp_mask;
1709         struct sockaddr_in6 *sin6;
1710         struct sockaddr_ib *sib;
1711
1712         memset(&path_rec, 0, sizeof path_rec);
1713         rdma_addr_get_sgid(dev_addr, &path_rec.sgid);
1714         rdma_addr_get_dgid(dev_addr, &path_rec.dgid);
1715         path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
1716         path_rec.numb_path = 1;
1717         path_rec.reversible = 1;
1718         path_rec.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
1719
1720         comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
1721                     IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
1722                     IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
1723
1724         switch (cma_family(id_priv)) {
1725         case AF_INET:
1726                 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
1727                 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
1728                 break;
1729         case AF_INET6:
1730                 sin6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
1731                 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
1732                 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
1733                 break;
1734         case AF_IB:
1735                 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
1736                 path_rec.traffic_class = (u8) (be32_to_cpu(sib->sib_flowinfo) >> 20);
1737                 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
1738                 break;
1739         }
1740
1741         id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
1742                                                id_priv->id.port_num, &path_rec,
1743                                                comp_mask, timeout_ms,
1744                                                GFP_KERNEL, cma_query_handler,
1745                                                work, &id_priv->query);
1746
1747         return (id_priv->query_id < 0) ? id_priv->query_id : 0;
1748 }
1749
1750 static void cma_work_handler(struct work_struct *_work)
1751 {
1752         struct cma_work *work = container_of(_work, struct cma_work, work);
1753         struct rdma_id_private *id_priv = work->id;
1754         int destroy = 0;
1755
1756         mutex_lock(&id_priv->handler_mutex);
1757         if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
1758                 goto out;
1759
1760         if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1761                 cma_exch(id_priv, RDMA_CM_DESTROYING);
1762                 destroy = 1;
1763         }
1764 out:
1765         mutex_unlock(&id_priv->handler_mutex);
1766         cma_deref_id(id_priv);
1767         if (destroy)
1768                 rdma_destroy_id(&id_priv->id);
1769         kfree(work);
1770 }
1771
1772 static void cma_ndev_work_handler(struct work_struct *_work)
1773 {
1774         struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
1775         struct rdma_id_private *id_priv = work->id;
1776         int destroy = 0;
1777
1778         mutex_lock(&id_priv->handler_mutex);
1779         if (id_priv->state == RDMA_CM_DESTROYING ||
1780             id_priv->state == RDMA_CM_DEVICE_REMOVAL)
1781                 goto out;
1782
1783         if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1784                 cma_exch(id_priv, RDMA_CM_DESTROYING);
1785                 destroy = 1;
1786         }
1787
1788 out:
1789         mutex_unlock(&id_priv->handler_mutex);
1790         cma_deref_id(id_priv);
1791         if (destroy)
1792                 rdma_destroy_id(&id_priv->id);
1793         kfree(work);
1794 }
1795
1796 static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
1797 {
1798         struct rdma_route *route = &id_priv->id.route;
1799         struct cma_work *work;
1800         int ret;
1801
1802         work = kzalloc(sizeof *work, GFP_KERNEL);
1803         if (!work)
1804                 return -ENOMEM;
1805
1806         work->id = id_priv;
1807         INIT_WORK(&work->work, cma_work_handler);
1808         work->old_state = RDMA_CM_ROUTE_QUERY;
1809         work->new_state = RDMA_CM_ROUTE_RESOLVED;
1810         work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1811
1812         route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
1813         if (!route->path_rec) {
1814                 ret = -ENOMEM;
1815                 goto err1;
1816         }
1817
1818         ret = cma_query_ib_route(id_priv, timeout_ms, work);
1819         if (ret)
1820                 goto err2;
1821
1822         return 0;
1823 err2:
1824         kfree(route->path_rec);
1825         route->path_rec = NULL;
1826 err1:
1827         kfree(work);
1828         return ret;
1829 }
1830
1831 int rdma_set_ib_paths(struct rdma_cm_id *id,
1832                       struct ib_sa_path_rec *path_rec, int num_paths)
1833 {
1834         struct rdma_id_private *id_priv;
1835         int ret;
1836
1837         id_priv = container_of(id, struct rdma_id_private, id);
1838         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
1839                            RDMA_CM_ROUTE_RESOLVED))
1840                 return -EINVAL;
1841
1842         id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths,
1843                                      GFP_KERNEL);
1844         if (!id->route.path_rec) {
1845                 ret = -ENOMEM;
1846                 goto err;
1847         }
1848
1849         id->route.num_paths = num_paths;
1850         return 0;
1851 err:
1852         cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED);
1853         return ret;
1854 }
1855 EXPORT_SYMBOL(rdma_set_ib_paths);
1856
1857 static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
1858 {
1859         struct cma_work *work;
1860
1861         work = kzalloc(sizeof *work, GFP_KERNEL);
1862         if (!work)
1863                 return -ENOMEM;
1864
1865         work->id = id_priv;
1866         INIT_WORK(&work->work, cma_work_handler);
1867         work->old_state = RDMA_CM_ROUTE_QUERY;
1868         work->new_state = RDMA_CM_ROUTE_RESOLVED;
1869         work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1870         queue_work(cma_wq, &work->work);
1871         return 0;
1872 }
1873
1874 static int iboe_tos_to_sl(struct net_device *ndev, int tos)
1875 {
1876         int prio;
1877         struct net_device *dev;
1878
1879         prio = rt_tos2priority(tos);
1880         dev = ndev->priv_flags & IFF_802_1Q_VLAN ?
1881                 vlan_dev_real_dev(ndev) : ndev;
1882
1883         if (dev->num_tc)
1884                 return netdev_get_prio_tc_map(dev, prio);
1885
1886 #if IS_ENABLED(CONFIG_VLAN_8021Q)
1887         if (ndev->priv_flags & IFF_802_1Q_VLAN)
1888                 return (vlan_dev_get_egress_qos_mask(ndev, prio) &
1889                         VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
1890 #endif
1891         return 0;
1892 }
1893
1894 static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
1895 {
1896         struct rdma_route *route = &id_priv->id.route;
1897         struct rdma_addr *addr = &route->addr;
1898         struct cma_work *work;
1899         int ret;
1900         struct net_device *ndev = NULL;
1901
1902
1903         work = kzalloc(sizeof *work, GFP_KERNEL);
1904         if (!work)
1905                 return -ENOMEM;
1906
1907         work->id = id_priv;
1908         INIT_WORK(&work->work, cma_work_handler);
1909
1910         route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
1911         if (!route->path_rec) {
1912                 ret = -ENOMEM;
1913                 goto err1;
1914         }
1915
1916         route->num_paths = 1;
1917
1918         if (addr->dev_addr.bound_dev_if)
1919                 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if);
1920         if (!ndev) {
1921                 ret = -ENODEV;
1922                 goto err2;
1923         }
1924
1925         route->path_rec->vlan_id = rdma_vlan_dev_vlan_id(ndev);
1926         memcpy(route->path_rec->dmac, addr->dev_addr.dst_dev_addr, ETH_ALEN);
1927         memcpy(route->path_rec->smac, ndev->dev_addr, ndev->addr_len);
1928
1929         rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
1930                     &route->path_rec->sgid);
1931         rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.dst_addr,
1932                     &route->path_rec->dgid);
1933
1934         route->path_rec->hop_limit = 1;
1935         route->path_rec->reversible = 1;
1936         route->path_rec->pkey = cpu_to_be16(0xffff);
1937         route->path_rec->mtu_selector = IB_SA_EQ;
1938         route->path_rec->sl = iboe_tos_to_sl(ndev, id_priv->tos);
1939         route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
1940         route->path_rec->rate_selector = IB_SA_EQ;
1941         route->path_rec->rate = iboe_get_rate(ndev);
1942         dev_put(ndev);
1943         route->path_rec->packet_life_time_selector = IB_SA_EQ;
1944         route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
1945         if (!route->path_rec->mtu) {
1946                 ret = -EINVAL;
1947                 goto err2;
1948         }
1949
1950         work->old_state = RDMA_CM_ROUTE_QUERY;
1951         work->new_state = RDMA_CM_ROUTE_RESOLVED;
1952         work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1953         work->event.status = 0;
1954
1955         queue_work(cma_wq, &work->work);
1956
1957         return 0;
1958
1959 err2:
1960         kfree(route->path_rec);
1961         route->path_rec = NULL;
1962 err1:
1963         kfree(work);
1964         return ret;
1965 }
1966
1967 int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
1968 {
1969         struct rdma_id_private *id_priv;
1970         int ret;
1971
1972         id_priv = container_of(id, struct rdma_id_private, id);
1973         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY))
1974                 return -EINVAL;
1975
1976         atomic_inc(&id_priv->refcount);
1977         switch (rdma_node_get_transport(id->device->node_type)) {
1978         case RDMA_TRANSPORT_IB:
1979                 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
1980                 case IB_LINK_LAYER_INFINIBAND:
1981                         ret = cma_resolve_ib_route(id_priv, timeout_ms);
1982                         break;
1983                 case IB_LINK_LAYER_ETHERNET:
1984                         ret = cma_resolve_iboe_route(id_priv);
1985                         break;
1986                 default:
1987                         ret = -ENOSYS;
1988                 }
1989                 break;
1990         case RDMA_TRANSPORT_IWARP:
1991                 ret = cma_resolve_iw_route(id_priv, timeout_ms);
1992                 break;
1993         default:
1994                 ret = -ENOSYS;
1995                 break;
1996         }
1997         if (ret)
1998                 goto err;
1999
2000         return 0;
2001 err:
2002         cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED);
2003         cma_deref_id(id_priv);
2004         return ret;
2005 }
2006 EXPORT_SYMBOL(rdma_resolve_route);
2007
2008 static void cma_set_loopback(struct sockaddr *addr)
2009 {
2010         switch (addr->sa_family) {
2011         case AF_INET:
2012                 ((struct sockaddr_in *) addr)->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
2013                 break;
2014         case AF_INET6:
2015                 ipv6_addr_set(&((struct sockaddr_in6 *) addr)->sin6_addr,
2016                               0, 0, 0, htonl(1));
2017                 break;
2018         default:
2019                 ib_addr_set(&((struct sockaddr_ib *) addr)->sib_addr,
2020                             0, 0, 0, htonl(1));
2021                 break;
2022         }
2023 }
2024
2025 static int cma_bind_loopback(struct rdma_id_private *id_priv)
2026 {
2027         struct cma_device *cma_dev, *cur_dev;
2028         struct ib_port_attr port_attr;
2029         union ib_gid gid;
2030         u16 pkey;
2031         int ret;
2032         u8 p;
2033
2034         cma_dev = NULL;
2035         mutex_lock(&lock);
2036         list_for_each_entry(cur_dev, &dev_list, list) {
2037                 if (cma_family(id_priv) == AF_IB &&
2038                     rdma_node_get_transport(cur_dev->device->node_type) != RDMA_TRANSPORT_IB)
2039                         continue;
2040
2041                 if (!cma_dev)
2042                         cma_dev = cur_dev;
2043
2044                 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
2045                         if (!ib_query_port(cur_dev->device, p, &port_attr) &&
2046                             port_attr.state == IB_PORT_ACTIVE) {
2047                                 cma_dev = cur_dev;
2048                                 goto port_found;
2049                         }
2050                 }
2051         }
2052
2053         if (!cma_dev) {
2054                 ret = -ENODEV;
2055                 goto out;
2056         }
2057
2058         p = 1;
2059
2060 port_found:
2061         ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid);
2062         if (ret)
2063                 goto out;
2064
2065         ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
2066         if (ret)
2067                 goto out;
2068
2069         id_priv->id.route.addr.dev_addr.dev_type =
2070                 (rdma_port_get_link_layer(cma_dev->device, p) == IB_LINK_LAYER_INFINIBAND) ?
2071                 ARPHRD_INFINIBAND : ARPHRD_ETHER;
2072
2073         rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2074         ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
2075         id_priv->id.port_num = p;
2076         cma_attach_to_dev(id_priv, cma_dev);
2077         cma_set_loopback(cma_src_addr(id_priv));
2078 out:
2079         mutex_unlock(&lock);
2080         return ret;
2081 }
2082
2083 static void addr_handler(int status, struct sockaddr *src_addr,
2084                          struct rdma_dev_addr *dev_addr, void *context)
2085 {
2086         struct rdma_id_private *id_priv = context;
2087         struct rdma_cm_event event;
2088
2089         memset(&event, 0, sizeof event);
2090         mutex_lock(&id_priv->handler_mutex);
2091         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY,
2092                            RDMA_CM_ADDR_RESOLVED))
2093                 goto out;
2094
2095         memcpy(cma_src_addr(id_priv), src_addr, rdma_addr_size(src_addr));
2096         if (!status && !id_priv->cma_dev)
2097                 status = cma_acquire_dev(id_priv, NULL);
2098
2099         if (status) {
2100                 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2101                                    RDMA_CM_ADDR_BOUND))
2102                         goto out;
2103                 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2104                 event.status = status;
2105         } else
2106                 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2107
2108         if (id_priv->id.event_handler(&id_priv->id, &event)) {
2109                 cma_exch(id_priv, RDMA_CM_DESTROYING);
2110                 mutex_unlock(&id_priv->handler_mutex);
2111                 cma_deref_id(id_priv);
2112                 rdma_destroy_id(&id_priv->id);
2113                 return;
2114         }
2115 out:
2116         mutex_unlock(&id_priv->handler_mutex);
2117         cma_deref_id(id_priv);
2118 }
2119
2120 static int cma_resolve_loopback(struct rdma_id_private *id_priv)
2121 {
2122         struct cma_work *work;
2123         union ib_gid gid;
2124         int ret;
2125
2126         work = kzalloc(sizeof *work, GFP_KERNEL);
2127         if (!work)
2128                 return -ENOMEM;
2129
2130         if (!id_priv->cma_dev) {
2131                 ret = cma_bind_loopback(id_priv);
2132                 if (ret)
2133                         goto err;
2134         }
2135
2136         rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2137         rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
2138
2139         work->id = id_priv;
2140         INIT_WORK(&work->work, cma_work_handler);
2141         work->old_state = RDMA_CM_ADDR_QUERY;
2142         work->new_state = RDMA_CM_ADDR_RESOLVED;
2143         work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2144         queue_work(cma_wq, &work->work);
2145         return 0;
2146 err:
2147         kfree(work);
2148         return ret;
2149 }
2150
2151 static int cma_resolve_ib_addr(struct rdma_id_private *id_priv)
2152 {
2153         struct cma_work *work;
2154         int ret;
2155
2156         work = kzalloc(sizeof *work, GFP_KERNEL);
2157         if (!work)
2158                 return -ENOMEM;
2159
2160         if (!id_priv->cma_dev) {
2161                 ret = cma_resolve_ib_dev(id_priv);
2162                 if (ret)
2163                         goto err;
2164         }
2165
2166         rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, (union ib_gid *)
2167                 &(((struct sockaddr_ib *) &id_priv->id.route.addr.dst_addr)->sib_addr));
2168
2169         work->id = id_priv;
2170         INIT_WORK(&work->work, cma_work_handler);
2171         work->old_state = RDMA_CM_ADDR_QUERY;
2172         work->new_state = RDMA_CM_ADDR_RESOLVED;
2173         work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2174         queue_work(cma_wq, &work->work);
2175         return 0;
2176 err:
2177         kfree(work);
2178         return ret;
2179 }
2180
2181 static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2182                          struct sockaddr *dst_addr)
2183 {
2184         if (!src_addr || !src_addr->sa_family) {
2185                 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
2186                 src_addr->sa_family = dst_addr->sa_family;
2187                 if (dst_addr->sa_family == AF_INET6) {
2188                         ((struct sockaddr_in6 *) src_addr)->sin6_scope_id =
2189                                 ((struct sockaddr_in6 *) dst_addr)->sin6_scope_id;
2190                 } else if (dst_addr->sa_family == AF_IB) {
2191                         ((struct sockaddr_ib *) src_addr)->sib_pkey =
2192                                 ((struct sockaddr_ib *) dst_addr)->sib_pkey;
2193                 }
2194         }
2195         return rdma_bind_addr(id, src_addr);
2196 }
2197
2198 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2199                       struct sockaddr *dst_addr, int timeout_ms)
2200 {
2201         struct rdma_id_private *id_priv;
2202         int ret;
2203
2204         id_priv = container_of(id, struct rdma_id_private, id);
2205         if (id_priv->state == RDMA_CM_IDLE) {
2206                 ret = cma_bind_addr(id, src_addr, dst_addr);
2207                 if (ret)
2208                         return ret;
2209         }
2210
2211         if (cma_family(id_priv) != dst_addr->sa_family)
2212                 return -EINVAL;
2213
2214         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY))
2215                 return -EINVAL;
2216
2217         atomic_inc(&id_priv->refcount);
2218         memcpy(cma_dst_addr(id_priv), dst_addr, rdma_addr_size(dst_addr));
2219         if (cma_any_addr(dst_addr)) {
2220                 ret = cma_resolve_loopback(id_priv);
2221         } else {
2222                 if (dst_addr->sa_family == AF_IB) {
2223                         ret = cma_resolve_ib_addr(id_priv);
2224                 } else {
2225                         ret = rdma_resolve_ip(&addr_client, cma_src_addr(id_priv),
2226                                               dst_addr, &id->route.addr.dev_addr,
2227                                               timeout_ms, addr_handler, id_priv);
2228                 }
2229         }
2230         if (ret)
2231                 goto err;
2232
2233         return 0;
2234 err:
2235         cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
2236         cma_deref_id(id_priv);
2237         return ret;
2238 }
2239 EXPORT_SYMBOL(rdma_resolve_addr);
2240
2241 int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
2242 {
2243         struct rdma_id_private *id_priv;
2244         unsigned long flags;
2245         int ret;
2246
2247         id_priv = container_of(id, struct rdma_id_private, id);
2248         spin_lock_irqsave(&id_priv->lock, flags);
2249         if (reuse || id_priv->state == RDMA_CM_IDLE) {
2250                 id_priv->reuseaddr = reuse;
2251                 ret = 0;
2252         } else {
2253                 ret = -EINVAL;
2254         }
2255         spin_unlock_irqrestore(&id_priv->lock, flags);
2256         return ret;
2257 }
2258 EXPORT_SYMBOL(rdma_set_reuseaddr);
2259
2260 int rdma_set_afonly(struct rdma_cm_id *id, int afonly)
2261 {
2262         struct rdma_id_private *id_priv;
2263         unsigned long flags;
2264         int ret;
2265
2266         id_priv = container_of(id, struct rdma_id_private, id);
2267         spin_lock_irqsave(&id_priv->lock, flags);
2268         if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) {
2269                 id_priv->options |= (1 << CMA_OPTION_AFONLY);
2270                 id_priv->afonly = afonly;
2271                 ret = 0;
2272         } else {
2273                 ret = -EINVAL;
2274         }
2275         spin_unlock_irqrestore(&id_priv->lock, flags);
2276         return ret;
2277 }
2278 EXPORT_SYMBOL(rdma_set_afonly);
2279
2280 static void cma_bind_port(struct rdma_bind_list *bind_list,
2281                           struct rdma_id_private *id_priv)
2282 {
2283         struct sockaddr *addr;
2284         struct sockaddr_ib *sib;
2285         u64 sid, mask;
2286         __be16 port;
2287
2288         addr = cma_src_addr(id_priv);
2289         port = htons(bind_list->port);
2290
2291         switch (addr->sa_family) {
2292         case AF_INET:
2293                 ((struct sockaddr_in *) addr)->sin_port = port;
2294                 break;
2295         case AF_INET6:
2296                 ((struct sockaddr_in6 *) addr)->sin6_port = port;
2297                 break;
2298         case AF_IB:
2299                 sib = (struct sockaddr_ib *) addr;
2300                 sid = be64_to_cpu(sib->sib_sid);
2301                 mask = be64_to_cpu(sib->sib_sid_mask);
2302                 sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port));
2303                 sib->sib_sid_mask = cpu_to_be64(~0ULL);
2304                 break;
2305         }
2306         id_priv->bind_list = bind_list;
2307         hlist_add_head(&id_priv->node, &bind_list->owners);
2308 }
2309
2310 static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv,
2311                           unsigned short snum)
2312 {
2313         struct rdma_bind_list *bind_list;
2314         int ret;
2315
2316         bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
2317         if (!bind_list)
2318                 return -ENOMEM;
2319
2320         ret = idr_alloc(ps, bind_list, snum, snum + 1, GFP_KERNEL);
2321         if (ret < 0)
2322                 goto err;
2323
2324         bind_list->ps = ps;
2325         bind_list->port = (unsigned short)ret;
2326         cma_bind_port(bind_list, id_priv);
2327         return 0;
2328 err:
2329         kfree(bind_list);
2330         return ret == -ENOSPC ? -EADDRNOTAVAIL : ret;
2331 }
2332
2333 static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv)
2334 {
2335         static unsigned int last_used_port;
2336         int low, high, remaining;
2337         unsigned int rover;
2338
2339         inet_get_local_port_range(&init_net, &low, &high);
2340         remaining = (high - low) + 1;
2341         rover = prandom_u32() % remaining + low;
2342 retry:
2343         if (last_used_port != rover &&
2344             !idr_find(ps, (unsigned short) rover)) {
2345                 int ret = cma_alloc_port(ps, id_priv, rover);
2346                 /*
2347                  * Remember previously used port number in order to avoid
2348                  * re-using same port immediately after it is closed.
2349                  */
2350                 if (!ret)
2351                         last_used_port = rover;
2352                 if (ret != -EADDRNOTAVAIL)
2353                         return ret;
2354         }
2355         if (--remaining) {
2356                 rover++;
2357                 if ((rover < low) || (rover > high))
2358                         rover = low;
2359                 goto retry;
2360         }
2361         return -EADDRNOTAVAIL;
2362 }
2363
2364 /*
2365  * Check that the requested port is available.  This is called when trying to
2366  * bind to a specific port, or when trying to listen on a bound port.  In
2367  * the latter case, the provided id_priv may already be on the bind_list, but
2368  * we still need to check that it's okay to start listening.
2369  */
2370 static int cma_check_port(struct rdma_bind_list *bind_list,
2371                           struct rdma_id_private *id_priv, uint8_t reuseaddr)
2372 {
2373         struct rdma_id_private *cur_id;
2374         struct sockaddr *addr, *cur_addr;
2375
2376         addr = cma_src_addr(id_priv);
2377         hlist_for_each_entry(cur_id, &bind_list->owners, node) {
2378                 if (id_priv == cur_id)
2379                         continue;
2380
2381                 if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr &&
2382                     cur_id->reuseaddr)
2383                         continue;
2384
2385                 cur_addr = cma_src_addr(cur_id);
2386                 if (id_priv->afonly && cur_id->afonly &&
2387                     (addr->sa_family != cur_addr->sa_family))
2388                         continue;
2389
2390                 if (cma_any_addr(addr) || cma_any_addr(cur_addr))
2391                         return -EADDRNOTAVAIL;
2392
2393                 if (!cma_addr_cmp(addr, cur_addr))
2394                         return -EADDRINUSE;
2395         }
2396         return 0;
2397 }
2398
2399 static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv)
2400 {
2401         struct rdma_bind_list *bind_list;
2402         unsigned short snum;
2403         int ret;
2404
2405         snum = ntohs(cma_port(cma_src_addr(id_priv)));
2406         if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
2407                 return -EACCES;
2408
2409         bind_list = idr_find(ps, snum);
2410         if (!bind_list) {
2411                 ret = cma_alloc_port(ps, id_priv, snum);
2412         } else {
2413                 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
2414                 if (!ret)
2415                         cma_bind_port(bind_list, id_priv);
2416         }
2417         return ret;
2418 }
2419
2420 static int cma_bind_listen(struct rdma_id_private *id_priv)
2421 {
2422         struct rdma_bind_list *bind_list = id_priv->bind_list;
2423         int ret = 0;
2424
2425         mutex_lock(&lock);
2426         if (bind_list->owners.first->next)
2427                 ret = cma_check_port(bind_list, id_priv, 0);
2428         mutex_unlock(&lock);
2429         return ret;
2430 }
2431
2432 static struct idr *cma_select_inet_ps(struct rdma_id_private *id_priv)
2433 {
2434         switch (id_priv->id.ps) {
2435         case RDMA_PS_TCP:
2436                 return &tcp_ps;
2437         case RDMA_PS_UDP:
2438                 return &udp_ps;
2439         case RDMA_PS_IPOIB:
2440                 return &ipoib_ps;
2441         case RDMA_PS_IB:
2442                 return &ib_ps;
2443         default:
2444                 return NULL;
2445         }
2446 }
2447
2448 static struct idr *cma_select_ib_ps(struct rdma_id_private *id_priv)
2449 {
2450         struct idr *ps = NULL;
2451         struct sockaddr_ib *sib;
2452         u64 sid_ps, mask, sid;
2453
2454         sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
2455         mask = be64_to_cpu(sib->sib_sid_mask) & RDMA_IB_IP_PS_MASK;
2456         sid = be64_to_cpu(sib->sib_sid) & mask;
2457
2458         if ((id_priv->id.ps == RDMA_PS_IB) && (sid == (RDMA_IB_IP_PS_IB & mask))) {
2459                 sid_ps = RDMA_IB_IP_PS_IB;
2460                 ps = &ib_ps;
2461         } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_TCP)) &&
2462                    (sid == (RDMA_IB_IP_PS_TCP & mask))) {
2463                 sid_ps = RDMA_IB_IP_PS_TCP;
2464                 ps = &tcp_ps;
2465         } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_UDP)) &&
2466                    (sid == (RDMA_IB_IP_PS_UDP & mask))) {
2467                 sid_ps = RDMA_IB_IP_PS_UDP;
2468                 ps = &udp_ps;
2469         }
2470
2471         if (ps) {
2472                 sib->sib_sid = cpu_to_be64(sid_ps | ntohs(cma_port((struct sockaddr *) sib)));
2473                 sib->sib_sid_mask = cpu_to_be64(RDMA_IB_IP_PS_MASK |
2474                                                 be64_to_cpu(sib->sib_sid_mask));
2475         }
2476         return ps;
2477 }
2478
2479 static int cma_get_port(struct rdma_id_private *id_priv)
2480 {
2481         struct idr *ps;
2482         int ret;
2483
2484         if (cma_family(id_priv) != AF_IB)
2485                 ps = cma_select_inet_ps(id_priv);
2486         else
2487                 ps = cma_select_ib_ps(id_priv);
2488         if (!ps)
2489                 return -EPROTONOSUPPORT;
2490
2491         mutex_lock(&lock);
2492         if (cma_any_port(cma_src_addr(id_priv)))
2493                 ret = cma_alloc_any_port(ps, id_priv);
2494         else
2495                 ret = cma_use_port(ps, id_priv);
2496         mutex_unlock(&lock);
2497
2498         return ret;
2499 }
2500
2501 static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
2502                                struct sockaddr *addr)
2503 {
2504 #if IS_ENABLED(CONFIG_IPV6)
2505         struct sockaddr_in6 *sin6;
2506
2507         if (addr->sa_family != AF_INET6)
2508                 return 0;
2509
2510         sin6 = (struct sockaddr_in6 *) addr;
2511
2512         if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL))
2513                 return 0;
2514
2515         if (!sin6->sin6_scope_id)
2516                         return -EINVAL;
2517
2518         dev_addr->bound_dev_if = sin6->sin6_scope_id;
2519 #endif
2520         return 0;
2521 }
2522
2523 int rdma_listen(struct rdma_cm_id *id, int backlog)
2524 {
2525         struct rdma_id_private *id_priv;
2526         int ret;
2527
2528         id_priv = container_of(id, struct rdma_id_private, id);
2529         if (id_priv->state == RDMA_CM_IDLE) {
2530                 id->route.addr.src_addr.ss_family = AF_INET;
2531                 ret = rdma_bind_addr(id, cma_src_addr(id_priv));
2532                 if (ret)
2533                         return ret;
2534         }
2535
2536         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN))
2537                 return -EINVAL;
2538
2539         if (id_priv->reuseaddr) {
2540                 ret = cma_bind_listen(id_priv);
2541                 if (ret)
2542                         goto err;
2543         }
2544
2545         id_priv->backlog = backlog;
2546         if (id->device) {
2547                 switch (rdma_node_get_transport(id->device->node_type)) {
2548                 case RDMA_TRANSPORT_IB:
2549                         ret = cma_ib_listen(id_priv);
2550                         if (ret)
2551                                 goto err;
2552                         break;
2553                 case RDMA_TRANSPORT_IWARP:
2554                         ret = cma_iw_listen(id_priv, backlog);
2555                         if (ret)
2556                                 goto err;
2557                         break;
2558                 default:
2559                         ret = -ENOSYS;
2560                         goto err;
2561                 }
2562         } else
2563                 cma_listen_on_all(id_priv);
2564
2565         return 0;
2566 err:
2567         id_priv->backlog = 0;
2568         cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND);
2569         return ret;
2570 }
2571 EXPORT_SYMBOL(rdma_listen);
2572
2573 int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
2574 {
2575         struct rdma_id_private *id_priv;
2576         int ret;
2577
2578         if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6 &&
2579             addr->sa_family != AF_IB)
2580                 return -EAFNOSUPPORT;
2581
2582         id_priv = container_of(id, struct rdma_id_private, id);
2583         if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND))
2584                 return -EINVAL;
2585
2586         ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
2587         if (ret)
2588                 goto err1;
2589
2590         memcpy(cma_src_addr(id_priv), addr, rdma_addr_size(addr));
2591         if (!cma_any_addr(addr)) {
2592                 ret = cma_translate_addr(addr, &id->route.addr.dev_addr);
2593                 if (ret)
2594                         goto err1;
2595
2596                 ret = cma_acquire_dev(id_priv, NULL);
2597                 if (ret)
2598                         goto err1;
2599         }
2600
2601         if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) {
2602                 if (addr->sa_family == AF_INET)
2603                         id_priv->afonly = 1;
2604 #if IS_ENABLED(CONFIG_IPV6)
2605                 else if (addr->sa_family == AF_INET6)
2606                         id_priv->afonly = init_net.ipv6.sysctl.bindv6only;
2607 #endif
2608         }
2609         ret = cma_get_port(id_priv);
2610         if (ret)
2611                 goto err2;
2612
2613         return 0;
2614 err2:
2615         if (id_priv->cma_dev)
2616                 cma_release_dev(id_priv);
2617 err1:
2618         cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE);
2619         return ret;
2620 }
2621 EXPORT_SYMBOL(rdma_bind_addr);
2622
2623 static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv)
2624 {
2625         struct cma_hdr *cma_hdr;
2626
2627         cma_hdr = hdr;
2628         cma_hdr->cma_version = CMA_VERSION;
2629         if (cma_family(id_priv) == AF_INET) {
2630                 struct sockaddr_in *src4, *dst4;
2631
2632                 src4 = (struct sockaddr_in *) cma_src_addr(id_priv);
2633                 dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv);
2634
2635                 cma_set_ip_ver(cma_hdr, 4);
2636                 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2637                 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2638                 cma_hdr->port = src4->sin_port;
2639         } else if (cma_family(id_priv) == AF_INET6) {
2640                 struct sockaddr_in6 *src6, *dst6;
2641
2642                 src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
2643                 dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv);
2644
2645                 cma_set_ip_ver(cma_hdr, 6);
2646                 cma_hdr->src_addr.ip6 = src6->sin6_addr;
2647                 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
2648                 cma_hdr->port = src6->sin6_port;
2649         }
2650         return 0;
2651 }
2652
2653 static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
2654                                 struct ib_cm_event *ib_event)
2655 {
2656         struct rdma_id_private *id_priv = cm_id->context;
2657         struct rdma_cm_event event;
2658         struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
2659         int ret = 0;
2660
2661         if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
2662                 return 0;
2663
2664         memset(&event, 0, sizeof event);
2665         switch (ib_event->event) {
2666         case IB_CM_SIDR_REQ_ERROR:
2667                 event.event = RDMA_CM_EVENT_UNREACHABLE;
2668                 event.status = -ETIMEDOUT;
2669                 break;
2670         case IB_CM_SIDR_REP_RECEIVED:
2671                 event.param.ud.private_data = ib_event->private_data;
2672                 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
2673                 if (rep->status != IB_SIDR_SUCCESS) {
2674                         event.event = RDMA_CM_EVENT_UNREACHABLE;
2675                         event.status = ib_event->param.sidr_rep_rcvd.status;
2676                         break;
2677                 }
2678                 ret = cma_set_qkey(id_priv, rep->qkey);
2679                 if (ret) {
2680                         event.event = RDMA_CM_EVENT_ADDR_ERROR;
2681                         event.status = ret;
2682                         break;
2683                 }
2684                 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
2685                                      id_priv->id.route.path_rec,
2686                                      &event.param.ud.ah_attr);
2687                 event.param.ud.qp_num = rep->qpn;
2688                 event.param.ud.qkey = rep->qkey;
2689                 event.event = RDMA_CM_EVENT_ESTABLISHED;
2690                 event.status = 0;
2691                 break;
2692         default:
2693                 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
2694                        ib_event->event);
2695                 goto out;
2696         }
2697
2698         ret = id_priv->id.event_handler(&id_priv->id, &event);
2699         if (ret) {
2700                 /* Destroy the CM ID by returning a non-zero value. */
2701                 id_priv->cm_id.ib = NULL;
2702                 cma_exch(id_priv, RDMA_CM_DESTROYING);
2703                 mutex_unlock(&id_priv->handler_mutex);
2704                 rdma_destroy_id(&id_priv->id);
2705                 return ret;
2706         }
2707 out:
2708         mutex_unlock(&id_priv->handler_mutex);
2709         return ret;
2710 }
2711
2712 static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
2713                               struct rdma_conn_param *conn_param)
2714 {
2715         struct ib_cm_sidr_req_param req;
2716         struct ib_cm_id *id;
2717         void *private_data;
2718         int offset, ret;
2719
2720         memset(&req, 0, sizeof req);
2721         offset = cma_user_data_offset(id_priv);
2722         req.private_data_len = offset + conn_param->private_data_len;
2723         if (req.private_data_len < conn_param->private_data_len)
2724                 return -EINVAL;
2725
2726         if (req.private_data_len) {
2727                 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2728                 if (!private_data)
2729                         return -ENOMEM;
2730         } else {
2731                 private_data = NULL;
2732         }
2733
2734         if (conn_param->private_data && conn_param->private_data_len)
2735                 memcpy(private_data + offset, conn_param->private_data,
2736                        conn_param->private_data_len);
2737
2738         if (private_data) {
2739                 ret = cma_format_hdr(private_data, id_priv);
2740                 if (ret)
2741                         goto out;
2742                 req.private_data = private_data;
2743         }
2744
2745         id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler,
2746                              id_priv);
2747         if (IS_ERR(id)) {
2748                 ret = PTR_ERR(id);
2749                 goto out;
2750         }
2751         id_priv->cm_id.ib = id;
2752
2753         req.path = id_priv->id.route.path_rec;
2754         req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
2755         req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
2756         req.max_cm_retries = CMA_MAX_CM_RETRIES;
2757
2758         ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
2759         if (ret) {
2760                 ib_destroy_cm_id(id_priv->cm_id.ib);
2761                 id_priv->cm_id.ib = NULL;
2762         }
2763 out:
2764         kfree(private_data);
2765         return ret;
2766 }
2767
2768 static int cma_connect_ib(struct rdma_id_private *id_priv,
2769                           struct rdma_conn_param *conn_param)
2770 {
2771         struct ib_cm_req_param req;
2772         struct rdma_route *route;
2773         void *private_data;
2774         struct ib_cm_id *id;
2775         int offset, ret;
2776
2777         memset(&req, 0, sizeof req);
2778         offset = cma_user_data_offset(id_priv);
2779         req.private_data_len = offset + conn_param->private_data_len;
2780         if (req.private_data_len < conn_param->private_data_len)
2781                 return -EINVAL;
2782
2783         if (req.private_data_len) {
2784                 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2785                 if (!private_data)
2786                         return -ENOMEM;
2787         } else {
2788                 private_data = NULL;
2789         }
2790
2791         if (conn_param->private_data && conn_param->private_data_len)
2792                 memcpy(private_data + offset, conn_param->private_data,
2793                        conn_param->private_data_len);
2794
2795         id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv);
2796         if (IS_ERR(id)) {
2797                 ret = PTR_ERR(id);
2798                 goto out;
2799         }
2800         id_priv->cm_id.ib = id;
2801
2802         route = &id_priv->id.route;
2803         if (private_data) {
2804                 ret = cma_format_hdr(private_data, id_priv);
2805                 if (ret)
2806                         goto out;
2807                 req.private_data = private_data;
2808         }
2809
2810         req.primary_path = &route->path_rec[0];
2811         if (route->num_paths == 2)
2812                 req.alternate_path = &route->path_rec[1];
2813
2814         req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
2815         req.qp_num = id_priv->qp_num;
2816         req.qp_type = id_priv->id.qp_type;
2817         req.starting_psn = id_priv->seq_num;
2818         req.responder_resources = conn_param->responder_resources;
2819         req.initiator_depth = conn_param->initiator_depth;
2820         req.flow_control = conn_param->flow_control;
2821         req.retry_count = min_t(u8, 7, conn_param->retry_count);
2822         req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
2823         req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2824         req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2825         req.max_cm_retries = CMA_MAX_CM_RETRIES;
2826         req.srq = id_priv->srq ? 1 : 0;
2827
2828         ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
2829 out:
2830         if (ret && !IS_ERR(id)) {
2831                 ib_destroy_cm_id(id);
2832                 id_priv->cm_id.ib = NULL;
2833         }
2834
2835         kfree(private_data);
2836         return ret;
2837 }
2838
2839 static int cma_connect_iw(struct rdma_id_private *id_priv,
2840                           struct rdma_conn_param *conn_param)
2841 {
2842         struct iw_cm_id *cm_id;
2843         int ret;
2844         struct iw_cm_conn_param iw_param;
2845
2846         cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
2847         if (IS_ERR(cm_id))
2848                 return PTR_ERR(cm_id);
2849
2850         id_priv->cm_id.iw = cm_id;
2851
2852         memcpy(&cm_id->local_addr, cma_src_addr(id_priv),
2853                rdma_addr_size(cma_src_addr(id_priv)));
2854         memcpy(&cm_id->remote_addr, cma_dst_addr(id_priv),
2855                rdma_addr_size(cma_dst_addr(id_priv)));
2856
2857         ret = cma_modify_qp_rtr(id_priv, conn_param);
2858         if (ret)
2859                 goto out;
2860
2861         if (conn_param) {
2862                 iw_param.ord = conn_param->initiator_depth;
2863                 iw_param.ird = conn_param->responder_resources;
2864                 iw_param.private_data = conn_param->private_data;
2865                 iw_param.private_data_len = conn_param->private_data_len;
2866                 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num;
2867         } else {
2868                 memset(&iw_param, 0, sizeof iw_param);
2869                 iw_param.qpn = id_priv->qp_num;
2870         }
2871         ret = iw_cm_connect(cm_id, &iw_param);
2872 out:
2873         if (ret) {
2874                 iw_destroy_cm_id(cm_id);
2875                 id_priv->cm_id.iw = NULL;
2876         }
2877         return ret;
2878 }
2879
2880 int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2881 {
2882         struct rdma_id_private *id_priv;
2883         int ret;
2884
2885         id_priv = container_of(id, struct rdma_id_private, id);
2886         if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT))
2887                 return -EINVAL;
2888
2889         if (!id->qp) {
2890                 id_priv->qp_num = conn_param->qp_num;
2891                 id_priv->srq = conn_param->srq;
2892         }
2893
2894         switch (rdma_node_get_transport(id->device->node_type)) {
2895         case RDMA_TRANSPORT_IB:
2896                 if (id->qp_type == IB_QPT_UD)
2897                         ret = cma_resolve_ib_udp(id_priv, conn_param);
2898                 else
2899                         ret = cma_connect_ib(id_priv, conn_param);
2900                 break;
2901         case RDMA_TRANSPORT_IWARP:
2902                 ret = cma_connect_iw(id_priv, conn_param);
2903                 break;
2904         default:
2905                 ret = -ENOSYS;
2906                 break;
2907         }
2908         if (ret)
2909                 goto err;
2910
2911         return 0;
2912 err:
2913         cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED);
2914         return ret;
2915 }
2916 EXPORT_SYMBOL(rdma_connect);
2917
2918 static int cma_accept_ib(struct rdma_id_private *id_priv,
2919                          struct rdma_conn_param *conn_param)
2920 {
2921         struct ib_cm_rep_param rep;
2922         int ret;
2923
2924         ret = cma_modify_qp_rtr(id_priv, conn_param);
2925         if (ret)
2926                 goto out;
2927
2928         ret = cma_modify_qp_rts(id_priv, conn_param);
2929         if (ret)
2930                 goto out;
2931
2932         memset(&rep, 0, sizeof rep);
2933         rep.qp_num = id_priv->qp_num;
2934         rep.starting_psn = id_priv->seq_num;
2935         rep.private_data = conn_param->private_data;
2936         rep.private_data_len = conn_param->private_data_len;
2937         rep.responder_resources = conn_param->responder_resources;
2938         rep.initiator_depth = conn_param->initiator_depth;
2939         rep.failover_accepted = 0;
2940         rep.flow_control = conn_param->flow_control;
2941         rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
2942         rep.srq = id_priv->srq ? 1 : 0;
2943
2944         ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
2945 out:
2946         return ret;
2947 }
2948
2949 static int cma_accept_iw(struct rdma_id_private *id_priv,
2950                   struct rdma_conn_param *conn_param)
2951 {
2952         struct iw_cm_conn_param iw_param;
2953         int ret;
2954
2955         ret = cma_modify_qp_rtr(id_priv, conn_param);
2956         if (ret)
2957                 return ret;
2958
2959         iw_param.ord = conn_param->initiator_depth;
2960         iw_param.ird = conn_param->responder_resources;
2961         iw_param.private_data = conn_param->private_data;
2962         iw_param.private_data_len = conn_param->private_data_len;
2963         if (id_priv->id.qp) {
2964                 iw_param.qpn = id_priv->qp_num;
2965         } else
2966                 iw_param.qpn = conn_param->qp_num;
2967
2968         return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
2969 }
2970
2971 static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
2972                              enum ib_cm_sidr_status status, u32 qkey,
2973                              const void *private_data, int private_data_len)
2974 {
2975         struct ib_cm_sidr_rep_param rep;
2976         int ret;
2977
2978         memset(&rep, 0, sizeof rep);
2979         rep.status = status;
2980         if (status == IB_SIDR_SUCCESS) {
2981                 ret = cma_set_qkey(id_priv, qkey);
2982                 if (ret)
2983                         return ret;
2984                 rep.qp_num = id_priv->qp_num;
2985                 rep.qkey = id_priv->qkey;
2986         }
2987         rep.private_data = private_data;
2988         rep.private_data_len = private_data_len;
2989
2990         return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
2991 }
2992
2993 int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2994 {
2995         struct rdma_id_private *id_priv;
2996         int ret;
2997
2998         id_priv = container_of(id, struct rdma_id_private, id);
2999
3000         id_priv->owner = task_pid_nr(current);
3001
3002         if (!cma_comp(id_priv, RDMA_CM_CONNECT))
3003                 return -EINVAL;
3004
3005         if (!id->qp && conn_param) {
3006                 id_priv->qp_num = conn_param->qp_num;
3007                 id_priv->srq = conn_param->srq;
3008         }
3009
3010         switch (rdma_node_get_transport(id->device->node_type)) {
3011         case RDMA_TRANSPORT_IB:
3012                 if (id->qp_type == IB_QPT_UD) {
3013                         if (conn_param)
3014                                 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
3015                                                         conn_param->qkey,
3016                                                         conn_param->private_data,
3017                                                         conn_param->private_data_len);
3018                         else
3019                                 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
3020                                                         0, NULL, 0);
3021                 } else {
3022                         if (conn_param)
3023                                 ret = cma_accept_ib(id_priv, conn_param);
3024                         else
3025                                 ret = cma_rep_recv(id_priv);
3026                 }
3027                 break;
3028         case RDMA_TRANSPORT_IWARP:
3029                 ret = cma_accept_iw(id_priv, conn_param);
3030                 break;
3031         default:
3032                 ret = -ENOSYS;
3033                 break;
3034         }
3035
3036         if (ret)
3037                 goto reject;
3038
3039         return 0;
3040 reject:
3041         cma_modify_qp_err(id_priv);
3042         rdma_reject(id, NULL, 0);
3043         return ret;
3044 }
3045 EXPORT_SYMBOL(rdma_accept);
3046
3047 int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
3048 {
3049         struct rdma_id_private *id_priv;
3050         int ret;
3051
3052         id_priv = container_of(id, struct rdma_id_private, id);
3053         if (!id_priv->cm_id.ib)
3054                 return -EINVAL;
3055
3056         switch (id->device->node_type) {
3057         case RDMA_NODE_IB_CA:
3058                 ret = ib_cm_notify(id_priv->cm_id.ib, event);
3059                 break;
3060         default:
3061                 ret = 0;
3062                 break;
3063         }
3064         return ret;
3065 }
3066 EXPORT_SYMBOL(rdma_notify);
3067
3068 int rdma_reject(struct rdma_cm_id *id, const void *private_data,
3069                 u8 private_data_len)
3070 {
3071         struct rdma_id_private *id_priv;
3072         int ret;
3073
3074         id_priv = container_of(id, struct rdma_id_private, id);
3075         if (!id_priv->cm_id.ib)
3076                 return -EINVAL;
3077
3078         switch (rdma_node_get_transport(id->device->node_type)) {
3079         case RDMA_TRANSPORT_IB:
3080                 if (id->qp_type == IB_QPT_UD)
3081                         ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0,
3082                                                 private_data, private_data_len);
3083                 else
3084                         ret = ib_send_cm_rej(id_priv->cm_id.ib,
3085                                              IB_CM_REJ_CONSUMER_DEFINED, NULL,
3086                                              0, private_data, private_data_len);
3087                 break;
3088         case RDMA_TRANSPORT_IWARP:
3089                 ret = iw_cm_reject(id_priv->cm_id.iw,
3090                                    private_data, private_data_len);
3091                 break;
3092         default:
3093                 ret = -ENOSYS;
3094                 break;
3095         }
3096         return ret;
3097 }
3098 EXPORT_SYMBOL(rdma_reject);
3099
3100 int rdma_disconnect(struct rdma_cm_id *id)
3101 {
3102         struct rdma_id_private *id_priv;
3103         int ret;
3104
3105         id_priv = container_of(id, struct rdma_id_private, id);
3106         if (!id_priv->cm_id.ib)
3107                 return -EINVAL;
3108
3109         switch (rdma_node_get_transport(id->device->node_type)) {
3110         case RDMA_TRANSPORT_IB:
3111                 ret = cma_modify_qp_err(id_priv);
3112                 if (ret)
3113                         goto out;
3114                 /* Initiate or respond to a disconnect. */
3115                 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
3116                         ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
3117                 break;
3118         case RDMA_TRANSPORT_IWARP:
3119                 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
3120                 break;
3121         default:
3122                 ret = -EINVAL;
3123                 break;
3124         }
3125 out:
3126         return ret;
3127 }
3128 EXPORT_SYMBOL(rdma_disconnect);
3129
3130 static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
3131 {
3132         struct rdma_id_private *id_priv;
3133         struct cma_multicast *mc = multicast->context;
3134         struct rdma_cm_event event;
3135         int ret;
3136
3137         id_priv = mc->id_priv;
3138         if (cma_disable_callback(id_priv, RDMA_CM_ADDR_BOUND) &&
3139             cma_disable_callback(id_priv, RDMA_CM_ADDR_RESOLVED))
3140                 return 0;
3141
3142         if (!status)
3143                 status = cma_set_qkey(id_priv, be32_to_cpu(multicast->rec.qkey));
3144         mutex_lock(&id_priv->qp_mutex);
3145         if (!status && id_priv->id.qp)
3146                 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
3147                                          be16_to_cpu(multicast->rec.mlid));
3148         mutex_unlock(&id_priv->qp_mutex);
3149
3150         memset(&event, 0, sizeof event);
3151         event.status = status;
3152         event.param.ud.private_data = mc->context;
3153         if (!status) {
3154                 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
3155                 ib_init_ah_from_mcmember(id_priv->id.device,
3156                                          id_priv->id.port_num, &multicast->rec,
3157                                          &event.param.ud.ah_attr);
3158                 event.param.ud.qp_num = 0xFFFFFF;
3159                 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
3160         } else
3161                 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
3162
3163         ret = id_priv->id.event_handler(&id_priv->id, &event);
3164         if (ret) {
3165                 cma_exch(id_priv, RDMA_CM_DESTROYING);
3166                 mutex_unlock(&id_priv->handler_mutex);
3167                 rdma_destroy_id(&id_priv->id);
3168                 return 0;
3169         }
3170
3171         mutex_unlock(&id_priv->handler_mutex);
3172         return 0;
3173 }
3174
3175 static void cma_set_mgid(struct rdma_id_private *id_priv,
3176                          struct sockaddr *addr, union ib_gid *mgid)
3177 {
3178         unsigned char mc_map[MAX_ADDR_LEN];
3179         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3180         struct sockaddr_in *sin = (struct sockaddr_in *) addr;
3181         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
3182
3183         if (cma_any_addr(addr)) {
3184                 memset(mgid, 0, sizeof *mgid);
3185         } else if ((addr->sa_family == AF_INET6) &&
3186                    ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
3187                                                                  0xFF10A01B)) {
3188                 /* IPv6 address is an SA assigned MGID. */
3189                 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3190         } else if (addr->sa_family == AF_IB) {
3191                 memcpy(mgid, &((struct sockaddr_ib *) addr)->sib_addr, sizeof *mgid);
3192         } else if ((addr->sa_family == AF_INET6)) {
3193                 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
3194                 if (id_priv->id.ps == RDMA_PS_UDP)
3195                         mc_map[7] = 0x01;       /* Use RDMA CM signature */
3196                 *mgid = *(union ib_gid *) (mc_map + 4);
3197         } else {
3198                 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
3199                 if (id_priv->id.ps == RDMA_PS_UDP)
3200                         mc_map[7] = 0x01;       /* Use RDMA CM signature */
3201                 *mgid = *(union ib_gid *) (mc_map + 4);
3202         }
3203 }
3204
3205 static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
3206                                  struct cma_multicast *mc)
3207 {
3208         struct ib_sa_mcmember_rec rec;
3209         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3210         ib_sa_comp_mask comp_mask;
3211         int ret;
3212
3213         ib_addr_get_mgid(dev_addr, &rec.mgid);
3214         ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
3215                                      &rec.mgid, &rec);
3216         if (ret)
3217                 return ret;
3218
3219         ret = cma_set_qkey(id_priv, 0);
3220         if (ret)
3221                 return ret;
3222
3223         cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
3224         rec.qkey = cpu_to_be32(id_priv->qkey);
3225         rdma_addr_get_sgid(dev_addr, &rec.port_gid);
3226         rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
3227         rec.join_state = 1;
3228
3229         comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
3230                     IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
3231                     IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
3232                     IB_SA_MCMEMBER_REC_FLOW_LABEL |
3233                     IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
3234
3235         if (id_priv->id.ps == RDMA_PS_IPOIB)
3236                 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
3237                              IB_SA_MCMEMBER_REC_RATE_SELECTOR |
3238                              IB_SA_MCMEMBER_REC_MTU_SELECTOR |
3239                              IB_SA_MCMEMBER_REC_MTU |
3240                              IB_SA_MCMEMBER_REC_HOP_LIMIT;
3241
3242         mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
3243                                                 id_priv->id.port_num, &rec,
3244                                                 comp_mask, GFP_KERNEL,
3245                                                 cma_ib_mc_handler, mc);
3246         return PTR_ERR_OR_ZERO(mc->multicast.ib);
3247 }
3248
3249 static void iboe_mcast_work_handler(struct work_struct *work)
3250 {
3251         struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
3252         struct cma_multicast *mc = mw->mc;
3253         struct ib_sa_multicast *m = mc->multicast.ib;
3254
3255         mc->multicast.ib->context = mc;
3256         cma_ib_mc_handler(0, m);
3257         kref_put(&mc->mcref, release_mc);
3258         kfree(mw);
3259 }
3260
3261 static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid)
3262 {
3263         struct sockaddr_in *sin = (struct sockaddr_in *)addr;
3264         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
3265
3266         if (cma_any_addr(addr)) {
3267                 memset(mgid, 0, sizeof *mgid);
3268         } else if (addr->sa_family == AF_INET6) {
3269                 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3270         } else {
3271                 mgid->raw[0] = 0xff;
3272                 mgid->raw[1] = 0x0e;
3273                 mgid->raw[2] = 0;
3274                 mgid->raw[3] = 0;
3275                 mgid->raw[4] = 0;
3276                 mgid->raw[5] = 0;
3277                 mgid->raw[6] = 0;
3278                 mgid->raw[7] = 0;
3279                 mgid->raw[8] = 0;
3280                 mgid->raw[9] = 0;
3281                 mgid->raw[10] = 0xff;
3282                 mgid->raw[11] = 0xff;
3283                 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
3284         }
3285 }
3286
3287 static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
3288                                    struct cma_multicast *mc)
3289 {
3290         struct iboe_mcast_work *work;
3291         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3292         int err;
3293         struct sockaddr *addr = (struct sockaddr *)&mc->addr;
3294         struct net_device *ndev = NULL;
3295
3296         if (cma_zero_addr((struct sockaddr *)&mc->addr))
3297                 return -EINVAL;
3298
3299         work = kzalloc(sizeof *work, GFP_KERNEL);
3300         if (!work)
3301                 return -ENOMEM;
3302
3303         mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
3304         if (!mc->multicast.ib) {
3305                 err = -ENOMEM;
3306                 goto out1;
3307         }
3308
3309         cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid);
3310
3311         mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
3312         if (id_priv->id.ps == RDMA_PS_UDP)
3313                 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
3314
3315         if (dev_addr->bound_dev_if)
3316                 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
3317         if (!ndev) {
3318                 err = -ENODEV;
3319                 goto out2;
3320         }
3321         mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
3322         mc->multicast.ib->rec.hop_limit = 1;
3323         mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu);
3324         dev_put(ndev);
3325         if (!mc->multicast.ib->rec.mtu) {
3326                 err = -EINVAL;
3327                 goto out2;
3328         }
3329         rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
3330                     &mc->multicast.ib->rec.port_gid);
3331         work->id = id_priv;
3332         work->mc = mc;
3333         INIT_WORK(&work->work, iboe_mcast_work_handler);
3334         kref_get(&mc->mcref);
3335         queue_work(cma_wq, &work->work);
3336
3337         return 0;
3338
3339 out2:
3340         kfree(mc->multicast.ib);
3341 out1:
3342         kfree(work);
3343         return err;
3344 }
3345
3346 int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
3347                         void *context)
3348 {
3349         struct rdma_id_private *id_priv;
3350         struct cma_multicast *mc;
3351         int ret;
3352
3353         id_priv = container_of(id, struct rdma_id_private, id);
3354         if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) &&
3355             !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED))
3356                 return -EINVAL;
3357
3358         mc = kmalloc(sizeof *mc, GFP_KERNEL);
3359         if (!mc)
3360                 return -ENOMEM;
3361
3362         memcpy(&mc->addr, addr, rdma_addr_size(addr));
3363         mc->context = context;
3364         mc->id_priv = id_priv;
3365
3366         spin_lock(&id_priv->lock);
3367         list_add(&mc->list, &id_priv->mc_list);
3368         spin_unlock(&id_priv->lock);
3369
3370         switch (rdma_node_get_transport(id->device->node_type)) {
3371         case RDMA_TRANSPORT_IB:
3372                 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
3373                 case IB_LINK_LAYER_INFINIBAND:
3374                         ret = cma_join_ib_multicast(id_priv, mc);
3375                         break;
3376                 case IB_LINK_LAYER_ETHERNET:
3377                         kref_init(&mc->mcref);
3378                         ret = cma_iboe_join_multicast(id_priv, mc);
3379                         break;
3380                 default:
3381                         ret = -EINVAL;
3382                 }
3383                 break;
3384         default:
3385                 ret = -ENOSYS;
3386                 break;
3387         }
3388
3389         if (ret) {
3390                 spin_lock_irq(&id_priv->lock);
3391                 list_del(&mc->list);
3392                 spin_unlock_irq(&id_priv->lock);
3393                 kfree(mc);
3394         }
3395         return ret;
3396 }
3397 EXPORT_SYMBOL(rdma_join_multicast);
3398
3399 void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
3400 {
3401         struct rdma_id_private *id_priv;
3402         struct cma_multicast *mc;
3403
3404         id_priv = container_of(id, struct rdma_id_private, id);
3405         spin_lock_irq(&id_priv->lock);
3406         list_for_each_entry(mc, &id_priv->mc_list, list) {
3407                 if (!memcmp(&mc->addr, addr, rdma_addr_size(addr))) {
3408                         list_del(&mc->list);
3409                         spin_unlock_irq(&id_priv->lock);
3410
3411                         if (id->qp)
3412                                 ib_detach_mcast(id->qp,
3413                                                 &mc->multicast.ib->rec.mgid,
3414                                                 be16_to_cpu(mc->multicast.ib->rec.mlid));
3415                         if (rdma_node_get_transport(id_priv->cma_dev->device->node_type) == RDMA_TRANSPORT_IB) {
3416                                 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
3417                                 case IB_LINK_LAYER_INFINIBAND:
3418                                         ib_sa_free_multicast(mc->multicast.ib);
3419                                         kfree(mc);
3420                                         break;
3421                                 case IB_LINK_LAYER_ETHERNET:
3422                                         kref_put(&mc->mcref, release_mc);
3423                                         break;
3424                                 default:
3425                                         break;
3426                                 }
3427                         }
3428                         return;
3429                 }
3430         }
3431         spin_unlock_irq(&id_priv->lock);
3432 }
3433 EXPORT_SYMBOL(rdma_leave_multicast);
3434
3435 static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
3436 {
3437         struct rdma_dev_addr *dev_addr;
3438         struct cma_ndev_work *work;
3439
3440         dev_addr = &id_priv->id.route.addr.dev_addr;
3441
3442         if ((dev_addr->bound_dev_if == ndev->ifindex) &&
3443             memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
3444                 printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n",
3445                        ndev->name, &id_priv->id);
3446                 work = kzalloc(sizeof *work, GFP_KERNEL);
3447                 if (!work)
3448                         return -ENOMEM;
3449
3450                 INIT_WORK(&work->work, cma_ndev_work_handler);
3451                 work->id = id_priv;
3452                 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
3453                 atomic_inc(&id_priv->refcount);
3454                 queue_work(cma_wq, &work->work);
3455         }
3456
3457         return 0;
3458 }
3459
3460 static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
3461                                void *ptr)
3462 {
3463         struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
3464         struct cma_device *cma_dev;
3465         struct rdma_id_private *id_priv;
3466         int ret = NOTIFY_DONE;
3467
3468         if (dev_net(ndev) != &init_net)
3469                 return NOTIFY_DONE;
3470
3471         if (event != NETDEV_BONDING_FAILOVER)
3472                 return NOTIFY_DONE;
3473
3474         if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING))
3475                 return NOTIFY_DONE;
3476
3477         mutex_lock(&lock);
3478         list_for_each_entry(cma_dev, &dev_list, list)
3479                 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3480                         ret = cma_netdev_change(ndev, id_priv);
3481                         if (ret)
3482                                 goto out;
3483                 }
3484
3485 out:
3486         mutex_unlock(&lock);
3487         return ret;
3488 }
3489
3490 static struct notifier_block cma_nb = {
3491         .notifier_call = cma_netdev_callback
3492 };
3493
3494 static void cma_add_one(struct ib_device *device)
3495 {
3496         struct cma_device *cma_dev;
3497         struct rdma_id_private *id_priv;
3498
3499         cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
3500         if (!cma_dev)
3501                 return;
3502
3503         cma_dev->device = device;
3504
3505         init_completion(&cma_dev->comp);
3506         atomic_set(&cma_dev->refcount, 1);
3507         INIT_LIST_HEAD(&cma_dev->id_list);
3508         ib_set_client_data(device, &cma_client, cma_dev);
3509
3510         mutex_lock(&lock);
3511         list_add_tail(&cma_dev->list, &dev_list);
3512         list_for_each_entry(id_priv, &listen_any_list, list)
3513                 cma_listen_on_dev(id_priv, cma_dev);
3514         mutex_unlock(&lock);
3515 }
3516
3517 static int cma_remove_id_dev(struct rdma_id_private *id_priv)
3518 {
3519         struct rdma_cm_event event;
3520         enum rdma_cm_state state;
3521         int ret = 0;
3522
3523         /* Record that we want to remove the device */
3524         state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL);
3525         if (state == RDMA_CM_DESTROYING)
3526                 return 0;
3527
3528         cma_cancel_operation(id_priv, state);
3529         mutex_lock(&id_priv->handler_mutex);
3530
3531         /* Check for destruction from another callback. */
3532         if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL))
3533                 goto out;
3534
3535         memset(&event, 0, sizeof event);
3536         event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
3537         ret = id_priv->id.event_handler(&id_priv->id, &event);
3538 out:
3539         mutex_unlock(&id_priv->handler_mutex);
3540         return ret;
3541 }
3542
3543 static void cma_process_remove(struct cma_device *cma_dev)
3544 {
3545         struct rdma_id_private *id_priv;
3546         int ret;
3547
3548         mutex_lock(&lock);
3549         while (!list_empty(&cma_dev->id_list)) {
3550                 id_priv = list_entry(cma_dev->id_list.next,
3551                                      struct rdma_id_private, list);
3552
3553                 list_del(&id_priv->listen_list);
3554                 list_del_init(&id_priv->list);
3555                 atomic_inc(&id_priv->refcount);
3556                 mutex_unlock(&lock);
3557
3558                 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
3559                 cma_deref_id(id_priv);
3560                 if (ret)
3561                         rdma_destroy_id(&id_priv->id);
3562
3563                 mutex_lock(&lock);
3564         }
3565         mutex_unlock(&lock);
3566
3567         cma_deref_dev(cma_dev);
3568         wait_for_completion(&cma_dev->comp);
3569 }
3570
3571 static void cma_remove_one(struct ib_device *device)
3572 {
3573         struct cma_device *cma_dev;
3574
3575         cma_dev = ib_get_client_data(device, &cma_client);
3576         if (!cma_dev)
3577                 return;
3578
3579         mutex_lock(&lock);
3580         list_del(&cma_dev->list);
3581         mutex_unlock(&lock);
3582
3583         cma_process_remove(cma_dev);
3584         kfree(cma_dev);
3585 }
3586
3587 static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb)
3588 {
3589         struct nlmsghdr *nlh;
3590         struct rdma_cm_id_stats *id_stats;
3591         struct rdma_id_private *id_priv;
3592         struct rdma_cm_id *id = NULL;
3593         struct cma_device *cma_dev;
3594         int i_dev = 0, i_id = 0;
3595
3596         /*
3597          * We export all of the IDs as a sequence of messages.  Each
3598          * ID gets its own netlink message.
3599          */
3600         mutex_lock(&lock);
3601
3602         list_for_each_entry(cma_dev, &dev_list, list) {
3603                 if (i_dev < cb->args[0]) {
3604                         i_dev++;
3605                         continue;
3606                 }
3607
3608                 i_id = 0;
3609                 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3610                         if (i_id < cb->args[1]) {
3611                                 i_id++;
3612                                 continue;
3613                         }
3614
3615                         id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq,
3616                                                 sizeof *id_stats, RDMA_NL_RDMA_CM,
3617                                                 RDMA_NL_RDMA_CM_ID_STATS,
3618                                                 NLM_F_MULTI);
3619                         if (!id_stats)
3620                                 goto out;
3621
3622                         memset(id_stats, 0, sizeof *id_stats);
3623                         id = &id_priv->id;
3624                         id_stats->node_type = id->route.addr.dev_addr.dev_type;
3625                         id_stats->port_num = id->port_num;
3626                         id_stats->bound_dev_if =
3627                                 id->route.addr.dev_addr.bound_dev_if;
3628
3629                         if (ibnl_put_attr(skb, nlh,
3630                                           rdma_addr_size(cma_src_addr(id_priv)),
3631                                           cma_src_addr(id_priv),
3632                                           RDMA_NL_RDMA_CM_ATTR_SRC_ADDR))
3633                                 goto out;
3634                         if (ibnl_put_attr(skb, nlh,
3635                                           rdma_addr_size(cma_src_addr(id_priv)),
3636                                           cma_dst_addr(id_priv),
3637                                           RDMA_NL_RDMA_CM_ATTR_DST_ADDR))
3638                                 goto out;
3639
3640                         id_stats->pid           = id_priv->owner;
3641                         id_stats->port_space    = id->ps;
3642                         id_stats->cm_state      = id_priv->state;
3643                         id_stats->qp_num        = id_priv->qp_num;
3644                         id_stats->qp_type       = id->qp_type;
3645
3646                         i_id++;
3647                 }
3648
3649                 cb->args[1] = 0;
3650                 i_dev++;
3651         }
3652
3653 out:
3654         mutex_unlock(&lock);
3655         cb->args[0] = i_dev;
3656         cb->args[1] = i_id;
3657
3658         return skb->len;
3659 }
3660
3661 static const struct ibnl_client_cbs cma_cb_table[] = {
3662         [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats,
3663                                        .module = THIS_MODULE },
3664 };
3665
3666 static int __init cma_init(void)
3667 {
3668         int ret;
3669
3670         cma_wq = create_singlethread_workqueue("rdma_cm");
3671         if (!cma_wq)
3672                 return -ENOMEM;
3673
3674         ib_sa_register_client(&sa_client);
3675         rdma_addr_register_client(&addr_client);
3676         register_netdevice_notifier(&cma_nb);
3677
3678         ret = ib_register_client(&cma_client);
3679         if (ret)
3680                 goto err;
3681
3682         if (ibnl_add_client(RDMA_NL_RDMA_CM, RDMA_NL_RDMA_CM_NUM_OPS, cma_cb_table))
3683                 printk(KERN_WARNING "RDMA CMA: failed to add netlink callback\n");
3684
3685         return 0;
3686
3687 err:
3688         unregister_netdevice_notifier(&cma_nb);
3689         rdma_addr_unregister_client(&addr_client);
3690         ib_sa_unregister_client(&sa_client);
3691         destroy_workqueue(cma_wq);
3692         return ret;
3693 }
3694
3695 static void __exit cma_cleanup(void)
3696 {
3697         ibnl_remove_client(RDMA_NL_RDMA_CM);
3698         ib_unregister_client(&cma_client);
3699         unregister_netdevice_notifier(&cma_nb);
3700         rdma_addr_unregister_client(&addr_client);
3701         ib_sa_unregister_client(&sa_client);
3702         destroy_workqueue(cma_wq);
3703         idr_destroy(&tcp_ps);
3704         idr_destroy(&udp_ps);
3705         idr_destroy(&ipoib_ps);
3706         idr_destroy(&ib_ps);
3707 }
3708
3709 module_init(cma_init);
3710 module_exit(cma_cleanup);