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