drivers/infiniband/core/cma.c

   1 /*
   2  * Copyright (c) 2005 Voltaire Inc.  All rights reserved.
   3  * Copyright (c) 2002-2005, Network Appliance, Inc. All rights reserved.
   4  * Copyright (c) 1999-2005, Mellanox Technologies, Inc. All rights reserved.
   5  * Copyright (c) 2005-2006 Intel Corporation.  All rights reserved.
   6  *
   7  * This software is available to you under a choice of one of two
   8  * licenses.  You may choose to be licensed under the terms of the GNU
   9  * General Public License (GPL) Version 2, available from the file
  10  * COPYING in the main directory of this source tree, or the
  11  * OpenIB.org BSD license below:
  12  *
  13  *     Redistribution and use in source and binary forms, with or
  14  *     without modification, are permitted provided that the following
  15  *     conditions are met:
  16  *
  17  *      - Redistributions of source code must retain the above
  18  *        copyright notice, this list of conditions and the following
  19  *        disclaimer.
  20  *
  21  *      - Redistributions in binary form must reproduce the above
  22  *        copyright notice, this list of conditions and the following
  23  *        disclaimer in the documentation and/or other materials
  24  *        provided with the distribution.
  25  *
  26  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  27  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  28  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  29  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  30  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  31  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  32  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  33  * SOFTWARE.
  34  */
  35
  36 #include <linux/completion.h>
  37 #include <linux/in.h>
  38 #include <linux/in6.h>
  39 #include <linux/mutex.h>
  40 #include <linux/random.h>
  41 #include <linux/idr.h>
  42 #include <linux/inetdevice.h>
  43 #include <linux/slab.h>
  44 #include <linux/module.h>
  45 #include <net/route.h>
  46
  47 #include <net/tcp.h>
  48 #include <net/ipv6.h>
  49
  50 #include <rdma/rdma_cm.h>
  51 #include <rdma/rdma_cm_ib.h>
  52 #include <rdma/rdma_netlink.h>
  53 #include <rdma/ib.h>
  54 #include <rdma/ib_cache.h>
  55 #include <rdma/ib_cm.h>
  56 #include <rdma/ib_sa.h>
  57 #include <rdma/iw_cm.h>
  58
  59 MODULE_AUTHOR("Sean Hefty");
  60 MODULE_DESCRIPTION("Generic RDMA CM Agent");
  61 MODULE_LICENSE("Dual BSD/GPL");
  62
  63 #define CMA_CM_RESPONSE_TIMEOUT 20
  64 #define CMA_MAX_CM_RETRIES 15
  65 #define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
  66 #define CMA_IBOE_PACKET_LIFETIME 18
  67
  68 static void cma_add_one(struct ib_device *device);
  69 static void cma_remove_one(struct ib_device *device);
  70
  71 static struct ib_client cma_client = {
  72         .name   = "cma",
  73         .add    = cma_add_one,
  74         .remove = cma_remove_one
  75 };
  76
  77 static struct ib_sa_client sa_client;
  78 static struct rdma_addr_client addr_client;
  79 static LIST_HEAD(dev_list);
  80 static LIST_HEAD(listen_any_list);
  81 static DEFINE_MUTEX(lock);
  82 static struct workqueue_struct *cma_wq;
  83 static DEFINE_IDR(tcp_ps);
  84 static DEFINE_IDR(udp_ps);
  85 static DEFINE_IDR(ipoib_ps);
  86 static DEFINE_IDR(ib_ps);
  87
  88 struct cma_device {
  89         struct list_head        list;
  90         struct ib_device        *device;
  91         struct completion       comp;
  92         atomic_t                refcount;
  93         struct list_head        id_list;
  94 };
  95
  96 struct rdma_bind_list {
  97         struct idr              *ps;
  98         struct hlist_head       owners;
  99         unsigned short          port;
 100 };
 101
 102 enum {
 103         CMA_OPTION_AFONLY,
 104 };
 105
 106 /*
 107  * Device removal can occur at anytime, so we need extra handling to
 108  * serialize notifying the user of device removal with other callbacks.
 109  * We do this by disabling removal notification while a callback is in process,
 110  * and reporting it after the callback completes.
 111  */
 112 struct rdma_id_private {
 113         struct rdma_cm_id       id;
 114
 115         struct rdma_bind_list   *bind_list;
 116         struct hlist_node       node;
 117         struct list_head        list; /* listen_any_list or cma_device.list */
 118         struct list_head        listen_list; /* per device listens */
 119         struct cma_device       *cma_dev;
 120         struct list_head        mc_list;
 121
 122         int                     internal_id;
 123         enum rdma_cm_state      state;
 124         spinlock_t              lock;
 125         struct mutex            qp_mutex;
 126
 127         struct completion       comp;
 128         atomic_t                refcount;
 129         struct mutex            handler_mutex;
 130
 131         int                     backlog;
 132         int                     timeout_ms;
 133         struct ib_sa_query      *query;
 134         int                     query_id;
 135         union {
 136                 struct ib_cm_id *ib;
 137                 struct iw_cm_id *iw;
 138         } cm_id;
 139
 140         u32                     seq_num;
 141         u32                     qkey;
 142         u32                     qp_num;
 143         pid_t                   owner;
 144         u32                     options;
 145         u8                      srq;
 146         u8                      tos;
 147         u8                      reuseaddr;
 148         u8                      afonly;
 149 };
 150
 151 struct cma_multicast {
 152         struct rdma_id_private *id_priv;
 153         union {
 154                 struct ib_sa_multicast *ib;
 155         } multicast;
 156         struct list_head        list;
 157         void                    *context;
 158         struct sockaddr_storage addr;
 159         struct kref             mcref;
 160 };
 161
 162 struct cma_work {
 163         struct work_struct      work;
 164         struct rdma_id_private  *id;
 165         enum rdma_cm_state      old_state;
 166         enum rdma_cm_state      new_state;
 167         struct rdma_cm_event    event;
 168 };
 169
 170 struct cma_ndev_work {
 171         struct work_struct      work;
 172         struct rdma_id_private  *id;
 173         struct rdma_cm_event    event;
 174 };
 175
 176 struct iboe_mcast_work {
 177         struct work_struct       work;
 178         struct rdma_id_private  *id;
 179         struct cma_multicast    *mc;
 180 };
 181
 182 union cma_ip_addr {
 183         struct in6_addr ip6;
 184         struct {
 185                 __be32 pad[3];
 186                 __be32 addr;
 187         } ip4;
 188 };
 189
 190 struct cma_hdr {
 191         u8 cma_version;
 192         u8 ip_version;  /* IP version: 7:4 */
 193         __be16 port;
 194         union cma_ip_addr src_addr;
 195         union cma_ip_addr dst_addr;
 196 };
 197
 198 #define CMA_VERSION 0x00
 199
 200 static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp)
 201 {
 202         unsigned long flags;
 203         int ret;
 204
 205         spin_lock_irqsave(&id_priv->lock, flags);
 206         ret = (id_priv->state == comp);
 207         spin_unlock_irqrestore(&id_priv->lock, flags);
 208         return ret;
 209 }
 210
 211 static int cma_comp_exch(struct rdma_id_private *id_priv,
 212                          enum rdma_cm_state comp, enum rdma_cm_state exch)
 213 {
 214         unsigned long flags;
 215         int ret;
 216
 217         spin_lock_irqsave(&id_priv->lock, flags);
 218         if ((ret = (id_priv->state == comp)))
 219                 id_priv->state = exch;
 220         spin_unlock_irqrestore(&id_priv->lock, flags);
 221         return ret;
 222 }
 223
 224 static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv,
 225                                    enum rdma_cm_state exch)
 226 {
 227         unsigned long flags;
 228         enum rdma_cm_state old;
 229
 230         spin_lock_irqsave(&id_priv->lock, flags);
 231         old = id_priv->state;
 232         id_priv->state = exch;
 233         spin_unlock_irqrestore(&id_priv->lock, flags);
 234         return old;
 235 }
 236
 237 static inline u8 cma_get_ip_ver(struct cma_hdr *hdr)
 238 {
 239         return hdr->ip_version >> 4;
 240 }
 241
 242 static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
 243 {
 244         hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
 245 }
 246
 247 static void cma_attach_to_dev(struct rdma_id_private *id_priv,
 248                               struct cma_device *cma_dev)
 249 {
 250         atomic_inc(&cma_dev->refcount);
 251         id_priv->cma_dev = cma_dev;
 252         id_priv->id.device = cma_dev->device;
 253         id_priv->id.route.addr.dev_addr.transport =
 254                 rdma_node_get_transport(cma_dev->device->node_type);
 255         list_add_tail(&id_priv->list, &cma_dev->id_list);
 256 }
 257
 258 static inline void cma_deref_dev(struct cma_device *cma_dev)
 259 {
 260         if (atomic_dec_and_test(&cma_dev->refcount))
 261                 complete(&cma_dev->comp);
 262 }
 263
 264 static inline void release_mc(struct kref *kref)
 265 {
 266         struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);
 267
 268         kfree(mc->multicast.ib);
 269         kfree(mc);
 270 }
 271
 272 static void cma_release_dev(struct rdma_id_private *id_priv)
 273 {
 274         mutex_lock(&lock);
 275         list_del(&id_priv->list);
 276         cma_deref_dev(id_priv->cma_dev);
 277         id_priv->cma_dev = NULL;
 278         mutex_unlock(&lock);
 279 }
 280
 281 static inline struct sockaddr *cma_src_addr(struct rdma_id_private *id_priv)
 282 {
 283         return (struct sockaddr *) &id_priv->id.route.addr.src_addr;
 284 }
 285
 286 static inline struct sockaddr *cma_dst_addr(struct rdma_id_private *id_priv)
 287 {
 288         return (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
 289 }
 290
 291 static inline unsigned short cma_family(struct rdma_id_private *id_priv)
 292 {
 293         return id_priv->id.route.addr.src_addr.ss_family;
 294 }
 295
 296 static int cma_set_qkey(struct rdma_id_private *id_priv, u32 qkey)
 297 {
 298         struct ib_sa_mcmember_rec rec;
 299         int ret = 0;
 300
 301         if (id_priv->qkey) {
 302                 if (qkey && id_priv->qkey != qkey)
 303                         return -EINVAL;
 304                 return 0;
 305         }
 306
 307         if (qkey) {
 308                 id_priv->qkey = qkey;
 309                 return 0;
 310         }
 311
 312         switch (id_priv->id.ps) {
 313         case RDMA_PS_UDP:
 314         case RDMA_PS_IB:
 315                 id_priv->qkey = RDMA_UDP_QKEY;
 316                 break;
 317         case RDMA_PS_IPOIB:
 318                 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
 319                 ret = ib_sa_get_mcmember_rec(id_priv->id.device,
 320                                              id_priv->id.port_num, &rec.mgid,
 321                                              &rec);
 322                 if (!ret)
 323                         id_priv->qkey = be32_to_cpu(rec.qkey);
 324                 break;
 325         default:
 326                 break;
 327         }
 328         return ret;
 329 }
 330
 331 static void cma_translate_ib(struct sockaddr_ib *sib, struct rdma_dev_addr *dev_addr)
 332 {
 333         dev_addr->dev_type = ARPHRD_INFINIBAND;
 334         rdma_addr_set_sgid(dev_addr, (union ib_gid *) &sib->sib_addr);
 335         ib_addr_set_pkey(dev_addr, ntohs(sib->sib_pkey));
 336 }
 337
 338 static int cma_translate_addr(struct sockaddr *addr, struct rdma_dev_addr *dev_addr)
 339 {
 340         int ret;
 341
 342         if (addr->sa_family != AF_IB) {
 343                 ret = rdma_translate_ip(addr, dev_addr, NULL);
 344         } else {
 345                 cma_translate_ib((struct sockaddr_ib *) addr, dev_addr);
 346                 ret = 0;
 347         }
 348
 349         return ret;
 350 }
 351
 352 static int cma_acquire_dev(struct rdma_id_private *id_priv,
 353                            struct rdma_id_private *listen_id_priv)
 354 {
 355         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
 356         struct cma_device *cma_dev;
 357         union ib_gid gid, iboe_gid;
 358         int ret = -ENODEV;
 359         u8 port, found_port;
 360         enum rdma_link_layer dev_ll = dev_addr->dev_type == ARPHRD_INFINIBAND ?
 361                 IB_LINK_LAYER_INFINIBAND : IB_LINK_LAYER_ETHERNET;
 362
 363         if (dev_ll != IB_LINK_LAYER_INFINIBAND &&
 364             id_priv->id.ps == RDMA_PS_IPOIB)
 365                 return -EINVAL;
 366
 367         mutex_lock(&lock);
 368         rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
 369                     &iboe_gid);
 370
 371         memcpy(&gid, dev_addr->src_dev_addr +
 372                rdma_addr_gid_offset(dev_addr), sizeof gid);
 373         if (listen_id_priv &&
 374             rdma_port_get_link_layer(listen_id_priv->id.device,
 375                                      listen_id_priv->id.port_num) == dev_ll) {
 376                 cma_dev = listen_id_priv->cma_dev;
 377                 port = listen_id_priv->id.port_num;
 378                 if (rdma_node_get_transport(cma_dev->device->node_type) == RDMA_TRANSPORT_IB &&
 379                     rdma_port_get_link_layer(cma_dev->device, port) == IB_LINK_LAYER_ETHERNET)
 380                         ret = ib_find_cached_gid(cma_dev->device, &iboe_gid,
 381                                                  &found_port, NULL);
 382                 else
 383                         ret = ib_find_cached_gid(cma_dev->device, &gid,
 384                                                  &found_port, NULL);
 385
 386                 if (!ret && (port  == found_port)) {
 387                         id_priv->id.port_num = found_port;
 388                         goto out;
 389                 }
 390         }
 391         list_for_each_entry(cma_dev, &dev_list, list) {
 392                 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
 393                         if (listen_id_priv &&
 394                             listen_id_priv->cma_dev == cma_dev &&
 395                             listen_id_priv->id.port_num == port)
 396                                 continue;
 397                         if (rdma_port_get_link_layer(cma_dev->device, port) == dev_ll) {
 398                                 if (rdma_node_get_transport(cma_dev->device->node_type) == RDMA_TRANSPORT_IB &&
 399                                     rdma_port_get_link_layer(cma_dev->device, port) == IB_LINK_LAYER_ETHERNET)
 400                                         ret = ib_find_cached_gid(cma_dev->device, &iboe_gid, &found_port, NULL);
 401                                 else
 402                                         ret = ib_find_cached_gid(cma_dev->device, &gid, &found_port, NULL);
 403
 404                                 if (!ret && (port == found_port)) {
 405                                         id_priv->id.port_num = found_port;
 406                                         goto out;
 407                                 }
 408                         }
 409                 }
 410         }
 411
 412 out:
 413         if (!ret)
 414                 cma_attach_to_dev(id_priv, cma_dev);
 415
 416         mutex_unlock(&lock);
 417         return ret;
 418 }
 419
 420 /*
 421  * Select the source IB device and address to reach the destination IB address.
 422  */
 423 static int cma_resolve_ib_dev(struct rdma_id_private *id_priv)
 424 {
 425         struct cma_device *cma_dev, *cur_dev;
 426         struct sockaddr_ib *addr;
 427         union ib_gid gid, sgid, *dgid;
 428         u16 pkey, index;
 429         u8 p;
 430         int i;
 431
 432         cma_dev = NULL;
 433         addr = (struct sockaddr_ib *) cma_dst_addr(id_priv);
 434         dgid = (union ib_gid *) &addr->sib_addr;
 435         pkey = ntohs(addr->sib_pkey);
 436
 437         list_for_each_entry(cur_dev, &dev_list, list) {
 438                 if (rdma_node_get_transport(cur_dev->device->node_type) != RDMA_TRANSPORT_IB)
 439                         continue;
 440
 441                 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
 442                         if (ib_find_cached_pkey(cur_dev->device, p, pkey, &index))
 443                                 continue;
 444
 445                         for (i = 0; !ib_get_cached_gid(cur_dev->device, p, i, &gid); i++) {
 446                                 if (!memcmp(&gid, dgid, sizeof(gid))) {
 447                                         cma_dev = cur_dev;
 448                                         sgid = gid;
 449                                         id_priv->id.port_num = p;
 450                                         goto found;
 451                                 }
 452
 453                                 if (!cma_dev && (gid.global.subnet_prefix ==
 454                                                  dgid->global.subnet_prefix)) {
 455                                         cma_dev = cur_dev;
 456                                         sgid = gid;
 457                                         id_priv->id.port_num = p;
 458                                 }
 459                         }
 460                 }
 461         }
 462
 463         if (!cma_dev)
 464                 return -ENODEV;
 465
 466 found:
 467         cma_attach_to_dev(id_priv, cma_dev);
 468         addr = (struct sockaddr_ib *) cma_src_addr(id_priv);
 469         memcpy(&addr->sib_addr, &sgid, sizeof sgid);
 470         cma_translate_ib(addr, &id_priv->id.route.addr.dev_addr);
 471         return 0;
 472 }
 473
 474 static void cma_deref_id(struct rdma_id_private *id_priv)
 475 {
 476         if (atomic_dec_and_test(&id_priv->refcount))
 477                 complete(&id_priv->comp);
 478 }
 479
 480 static int cma_disable_callback(struct rdma_id_private *id_priv,
 481                                 enum rdma_cm_state state)
 482 {
 483         mutex_lock(&id_priv->handler_mutex);
 484         if (id_priv->state != state) {
 485                 mutex_unlock(&id_priv->handler_mutex);
 486                 return -EINVAL;
 487         }
 488         return 0;
 489 }
 490
 491 struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
 492                                   void *context, enum rdma_port_space ps,
 493                                   enum ib_qp_type qp_type)
 494 {
 495         struct rdma_id_private *id_priv;
 496
 497         id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
 498         if (!id_priv)
 499                 return ERR_PTR(-ENOMEM);
 500
 501         id_priv->owner = task_pid_nr(current);
 502         id_priv->state = RDMA_CM_IDLE;
 503         id_priv->id.context = context;
 504         id_priv->id.event_handler = event_handler;
 505         id_priv->id.ps = ps;
 506         id_priv->id.qp_type = qp_type;
 507         spin_lock_init(&id_priv->lock);
 508         mutex_init(&id_priv->qp_mutex);
 509         init_completion(&id_priv->comp);
 510         atomic_set(&id_priv->refcount, 1);
 511         mutex_init(&id_priv->handler_mutex);
 512         INIT_LIST_HEAD(&id_priv->listen_list);
 513         INIT_LIST_HEAD(&id_priv->mc_list);
 514         get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
 515
 516         return &id_priv->id;
 517 }
 518 EXPORT_SYMBOL(rdma_create_id);
 519
 520 static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
 521 {
 522         struct ib_qp_attr qp_attr;
 523         int qp_attr_mask, ret;
 524
 525         qp_attr.qp_state = IB_QPS_INIT;
 526         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 527         if (ret)
 528                 return ret;
 529
 530         ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
 531         if (ret)
 532                 return ret;
 533
 534         qp_attr.qp_state = IB_QPS_RTR;
 535         ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
 536         if (ret)
 537                 return ret;
 538
 539         qp_attr.qp_state = IB_QPS_RTS;
 540         qp_attr.sq_psn = 0;
 541         ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
 542
 543         return ret;
 544 }
 545
 546 static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
 547 {
 548         struct ib_qp_attr qp_attr;
 549         int qp_attr_mask, ret;
 550
 551         qp_attr.qp_state = IB_QPS_INIT;
 552         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 553         if (ret)
 554                 return ret;
 555
 556         return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
 557 }
 558
 559 int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
 560                    struct ib_qp_init_attr *qp_init_attr)
 561 {
 562         struct rdma_id_private *id_priv;
 563         struct ib_qp *qp;
 564         int ret;
 565
 566         id_priv = container_of(id, struct rdma_id_private, id);
 567         if (id->device != pd->device)
 568                 return -EINVAL;
 569
 570         qp = ib_create_qp(pd, qp_init_attr);
 571         if (IS_ERR(qp))
 572                 return PTR_ERR(qp);
 573
 574         if (id->qp_type == IB_QPT_UD)
 575                 ret = cma_init_ud_qp(id_priv, qp);
 576         else
 577                 ret = cma_init_conn_qp(id_priv, qp);
 578         if (ret)
 579                 goto err;
 580
 581         id->qp = qp;
 582         id_priv->qp_num = qp->qp_num;
 583         id_priv->srq = (qp->srq != NULL);
 584         return 0;
 585 err:
 586         ib_destroy_qp(qp);
 587         return ret;
 588 }
 589 EXPORT_SYMBOL(rdma_create_qp);
 590
 591 void rdma_destroy_qp(struct rdma_cm_id *id)
 592 {
 593         struct rdma_id_private *id_priv;
 594
 595         id_priv = container_of(id, struct rdma_id_private, id);
 596         mutex_lock(&id_priv->qp_mutex);
 597         ib_destroy_qp(id_priv->id.qp);
 598         id_priv->id.qp = NULL;
 599         mutex_unlock(&id_priv->qp_mutex);
 600 }
 601 EXPORT_SYMBOL(rdma_destroy_qp);
 602
 603 static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
 604                              struct rdma_conn_param *conn_param)
 605 {
 606         struct ib_qp_attr qp_attr;
 607         int qp_attr_mask, ret;
 608         union ib_gid sgid;
 609
 610         mutex_lock(&id_priv->qp_mutex);
 611         if (!id_priv->id.qp) {
 612                 ret = 0;
 613                 goto out;
 614         }
 615
 616         /* Need to update QP attributes from default values. */
 617         qp_attr.qp_state = IB_QPS_INIT;
 618         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 619         if (ret)
 620                 goto out;
 621
 622         ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
 623         if (ret)
 624                 goto out;
 625
 626         qp_attr.qp_state = IB_QPS_RTR;
 627         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 628         if (ret)
 629                 goto out;
 630
 631         ret = ib_query_gid(id_priv->id.device, id_priv->id.port_num,
 632                            qp_attr.ah_attr.grh.sgid_index, &sgid);
 633         if (ret)
 634                 goto out;
 635
 636         if (rdma_node_get_transport(id_priv->cma_dev->device->node_type)
 637             == RDMA_TRANSPORT_IB &&
 638             rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num)
 639             == IB_LINK_LAYER_ETHERNET) {
 640                 ret = rdma_addr_find_smac_by_sgid(&sgid, qp_attr.smac, NULL);
 641
 642                 if (ret)
 643                         goto out;
 644         }
 645         if (conn_param)
 646                 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
 647         ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
 648 out:
 649         mutex_unlock(&id_priv->qp_mutex);
 650         return ret;
 651 }
 652
 653 static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
 654                              struct rdma_conn_param *conn_param)
 655 {
 656         struct ib_qp_attr qp_attr;
 657         int qp_attr_mask, ret;
 658
 659         mutex_lock(&id_priv->qp_mutex);
 660         if (!id_priv->id.qp) {
 661                 ret = 0;
 662                 goto out;
 663         }
 664
 665         qp_attr.qp_state = IB_QPS_RTS;
 666         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 667         if (ret)
 668                 goto out;
 669
 670         if (conn_param)
 671                 qp_attr.max_rd_atomic = conn_param->initiator_depth;
 672         ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
 673 out:
 674         mutex_unlock(&id_priv->qp_mutex);
 675         return ret;
 676 }
 677
 678 static int cma_modify_qp_err(struct rdma_id_private *id_priv)
 679 {
 680         struct ib_qp_attr qp_attr;
 681         int ret;
 682
 683         mutex_lock(&id_priv->qp_mutex);
 684         if (!id_priv->id.qp) {
 685                 ret = 0;
 686                 goto out;
 687         }
 688
 689         qp_attr.qp_state = IB_QPS_ERR;
 690         ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
 691 out:
 692         mutex_unlock(&id_priv->qp_mutex);
 693         return ret;
 694 }
 695
 696 static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
 697                                struct ib_qp_attr *qp_attr, int *qp_attr_mask)
 698 {
 699         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
 700         int ret;
 701         u16 pkey;
 702
 703         if (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num) ==
 704             IB_LINK_LAYER_INFINIBAND)
 705                 pkey = ib_addr_get_pkey(dev_addr);
 706         else
 707                 pkey = 0xffff;
 708
 709         ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
 710                                   pkey, &qp_attr->pkey_index);
 711         if (ret)
 712                 return ret;
 713
 714         qp_attr->port_num = id_priv->id.port_num;
 715         *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
 716
 717         if (id_priv->id.qp_type == IB_QPT_UD) {
 718                 ret = cma_set_qkey(id_priv, 0);
 719                 if (ret)
 720                         return ret;
 721
 722                 qp_attr->qkey = id_priv->qkey;
 723                 *qp_attr_mask |= IB_QP_QKEY;
 724         } else {
 725                 qp_attr->qp_access_flags = 0;
 726                 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
 727         }
 728         return 0;
 729 }
 730
 731 int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
 732                        int *qp_attr_mask)
 733 {
 734         struct rdma_id_private *id_priv;
 735         int ret = 0;
 736
 737         id_priv = container_of(id, struct rdma_id_private, id);
 738         switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
 739         case RDMA_TRANSPORT_IB:
 740                 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD))
 741                         ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
 742                 else
 743                         ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
 744                                                  qp_attr_mask);
 745
 746                 if (qp_attr->qp_state == IB_QPS_RTR)
 747                         qp_attr->rq_psn = id_priv->seq_num;
 748                 break;
 749         case RDMA_TRANSPORT_IWARP:
 750                 if (!id_priv->cm_id.iw) {
 751                         qp_attr->qp_access_flags = 0;
 752                         *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
 753                 } else
 754                         ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
 755                                                  qp_attr_mask);
 756                 break;
 757         default:
 758                 ret = -ENOSYS;
 759                 break;
 760         }
 761
 762         return ret;
 763 }
 764 EXPORT_SYMBOL(rdma_init_qp_attr);
 765
 766 static inline int cma_zero_addr(struct sockaddr *addr)
 767 {
 768         switch (addr->sa_family) {
 769         case AF_INET:
 770                 return ipv4_is_zeronet(((struct sockaddr_in *)addr)->sin_addr.s_addr);
 771         case AF_INET6:
 772                 return ipv6_addr_any(&((struct sockaddr_in6 *) addr)->sin6_addr);
 773         case AF_IB:
 774                 return ib_addr_any(&((struct sockaddr_ib *) addr)->sib_addr);
 775         default:
 776                 return 0;
 777         }
 778 }
 779
 780 static inline int cma_loopback_addr(struct sockaddr *addr)
 781 {
 782         switch (addr->sa_family) {
 783         case AF_INET:
 784                 return ipv4_is_loopback(((struct sockaddr_in *) addr)->sin_addr.s_addr);
 785         case AF_INET6:
 786                 return ipv6_addr_loopback(&((struct sockaddr_in6 *) addr)->sin6_addr);
 787         case AF_IB:
 788                 return ib_addr_loopback(&((struct sockaddr_ib *) addr)->sib_addr);
 789         default:
 790                 return 0;
 791         }
 792 }
 793
 794 static inline int cma_any_addr(struct sockaddr *addr)
 795 {
 796         return cma_zero_addr(addr) || cma_loopback_addr(addr);
 797 }
 798
 799 static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst)
 800 {
 801         if (src->sa_family != dst->sa_family)
 802                 return -1;
 803
 804         switch (src->sa_family) {
 805         case AF_INET:
 806                 return ((struct sockaddr_in *) src)->sin_addr.s_addr !=
 807                        ((struct sockaddr_in *) dst)->sin_addr.s_addr;
 808         case AF_INET6:
 809                 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr,
 810                                      &((struct sockaddr_in6 *) dst)->sin6_addr);
 811         default:
 812                 return ib_addr_cmp(&((struct sockaddr_ib *) src)->sib_addr,
 813                                    &((struct sockaddr_ib *) dst)->sib_addr);
 814         }
 815 }
 816
 817 static __be16 cma_port(struct sockaddr *addr)
 818 {
 819         struct sockaddr_ib *sib;
 820
 821         switch (addr->sa_family) {
 822         case AF_INET:
 823                 return ((struct sockaddr_in *) addr)->sin_port;
 824         case AF_INET6:
 825                 return ((struct sockaddr_in6 *) addr)->sin6_port;
 826         case AF_IB:
 827                 sib = (struct sockaddr_ib *) addr;
 828                 return htons((u16) (be64_to_cpu(sib->sib_sid) &
 829                                     be64_to_cpu(sib->sib_sid_mask)));
 830         default:
 831                 return 0;
 832         }
 833 }
 834
 835 static inline int cma_any_port(struct sockaddr *addr)
 836 {
 837         return !cma_port(addr);
 838 }
 839
 840 static void cma_save_ib_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id,
 841                              struct ib_sa_path_rec *path)
 842 {
 843         struct sockaddr_ib *listen_ib, *ib;
 844
 845         listen_ib = (struct sockaddr_ib *) &listen_id->route.addr.src_addr;
 846         ib = (struct sockaddr_ib *) &id->route.addr.src_addr;
 847         ib->sib_family = listen_ib->sib_family;
 848         ib->sib_pkey = path->pkey;
 849         ib->sib_flowinfo = path->flow_label;
 850         memcpy(&ib->sib_addr, &path->sgid, 16);
 851         ib->sib_sid = listen_ib->sib_sid;
 852         ib->sib_sid_mask = cpu_to_be64(0xffffffffffffffffULL);
 853         ib->sib_scope_id = listen_ib->sib_scope_id;
 854
 855         ib = (struct sockaddr_ib *) &id->route.addr.dst_addr;
 856         ib->sib_family = listen_ib->sib_family;
 857         ib->sib_pkey = path->pkey;
 858         ib->sib_flowinfo = path->flow_label;
 859         memcpy(&ib->sib_addr, &path->dgid, 16);
 860 }
 861
 862 static void cma_save_ip4_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id,
 863                               struct cma_hdr *hdr)
 864 {
 865         struct sockaddr_in *listen4, *ip4;
 866
 867         listen4 = (struct sockaddr_in *) &listen_id->route.addr.src_addr;
 868         ip4 = (struct sockaddr_in *) &id->route.addr.src_addr;
 869         ip4->sin_family = listen4->sin_family;
 870         ip4->sin_addr.s_addr = hdr->dst_addr.ip4.addr;
 871         ip4->sin_port = listen4->sin_port;
 872
 873         ip4 = (struct sockaddr_in *) &id->route.addr.dst_addr;
 874         ip4->sin_family = listen4->sin_family;
 875         ip4->sin_addr.s_addr = hdr->src_addr.ip4.addr;
 876         ip4->sin_port = hdr->port;
 877 }
 878
 879 static void cma_save_ip6_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id,
 880                               struct cma_hdr *hdr)
 881 {
 882         struct sockaddr_in6 *listen6, *ip6;
 883
 884         listen6 = (struct sockaddr_in6 *) &listen_id->route.addr.src_addr;
 885         ip6 = (struct sockaddr_in6 *) &id->route.addr.src_addr;
 886         ip6->sin6_family = listen6->sin6_family;
 887         ip6->sin6_addr = hdr->dst_addr.ip6;
 888         ip6->sin6_port = listen6->sin6_port;
 889
 890         ip6 = (struct sockaddr_in6 *) &id->route.addr.dst_addr;
 891         ip6->sin6_family = listen6->sin6_family;
 892         ip6->sin6_addr = hdr->src_addr.ip6;
 893         ip6->sin6_port = hdr->port;
 894 }
 895
 896 static int cma_save_net_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id,
 897                              struct ib_cm_event *ib_event)
 898 {
 899         struct cma_hdr *hdr;
 900
 901         if ((listen_id->route.addr.src_addr.ss_family == AF_IB) &&
 902             (ib_event->event == IB_CM_REQ_RECEIVED)) {
 903                 cma_save_ib_info(id, listen_id, ib_event->param.req_rcvd.primary_path);
 904                 return 0;
 905         }
 906
 907         hdr = ib_event->private_data;
 908         if (hdr->cma_version != CMA_VERSION)
 909                 return -EINVAL;
 910
 911         switch (cma_get_ip_ver(hdr)) {
 912         case 4:
 913                 cma_save_ip4_info(id, listen_id, hdr);
 914                 break;
 915         case 6:
 916                 cma_save_ip6_info(id, listen_id, hdr);
 917                 break;
 918         default:
 919                 return -EINVAL;
 920         }
 921         return 0;
 922 }
 923
 924 static inline int cma_user_data_offset(struct rdma_id_private *id_priv)
 925 {
 926         return cma_family(id_priv) == AF_IB ? 0 : sizeof(struct cma_hdr);
 927 }
 928
 929 static void cma_cancel_route(struct rdma_id_private *id_priv)
 930 {
 931         switch (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num)) {
 932         case IB_LINK_LAYER_INFINIBAND:
 933                 if (id_priv->query)
 934                         ib_sa_cancel_query(id_priv->query_id, id_priv->query);
 935                 break;
 936         default:
 937                 break;
 938         }
 939 }
 940
 941 static void cma_cancel_listens(struct rdma_id_private *id_priv)
 942 {
 943         struct rdma_id_private *dev_id_priv;
 944
 945         /*
 946          * Remove from listen_any_list to prevent added devices from spawning
 947          * additional listen requests.
 948          */
 949         mutex_lock(&lock);
 950         list_del(&id_priv->list);
 951
 952         while (!list_empty(&id_priv->listen_list)) {
 953                 dev_id_priv = list_entry(id_priv->listen_list.next,
 954                                          struct rdma_id_private, listen_list);
 955                 /* sync with device removal to avoid duplicate destruction */
 956                 list_del_init(&dev_id_priv->list);
 957                 list_del(&dev_id_priv->listen_list);
 958                 mutex_unlock(&lock);
 959
 960                 rdma_destroy_id(&dev_id_priv->id);
 961                 mutex_lock(&lock);
 962         }
 963         mutex_unlock(&lock);
 964 }
 965
 966 static void cma_cancel_operation(struct rdma_id_private *id_priv,
 967                                  enum rdma_cm_state state)
 968 {
 969         switch (state) {
 970         case RDMA_CM_ADDR_QUERY:
 971                 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
 972                 break;
 973         case RDMA_CM_ROUTE_QUERY:
 974                 cma_cancel_route(id_priv);
 975                 break;
 976         case RDMA_CM_LISTEN:
 977                 if (cma_any_addr(cma_src_addr(id_priv)) && !id_priv->cma_dev)
 978                         cma_cancel_listens(id_priv);
 979                 break;
 980         default:
 981                 break;
 982         }
 983 }
 984
 985 static void cma_release_port(struct rdma_id_private *id_priv)
 986 {
 987         struct rdma_bind_list *bind_list = id_priv->bind_list;
 988
 989         if (!bind_list)
 990                 return;
 991
 992         mutex_lock(&lock);
 993         hlist_del(&id_priv->node);
 994         if (hlist_empty(&bind_list->owners)) {
 995                 idr_remove(bind_list->ps, bind_list->port);
 996                 kfree(bind_list);
 997         }
 998         mutex_unlock(&lock);
 999 }
1000
1001 static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
1002 {
1003         struct cma_multicast *mc;
1004
1005         while (!list_empty(&id_priv->mc_list)) {
1006                 mc = container_of(id_priv->mc_list.next,
1007                                   struct cma_multicast, list);
1008                 list_del(&mc->list);
1009                 switch (rdma_port_get_link_layer(id_priv->cma_dev->device, id_priv->id.port_num)) {
1010                 case IB_LINK_LAYER_INFINIBAND:
1011                         ib_sa_free_multicast(mc->multicast.ib);
1012                         kfree(mc);
1013                         break;
1014                 case IB_LINK_LAYER_ETHERNET:
1015                         kref_put(&mc->mcref, release_mc);
1016                         break;
1017                 default:
1018                         break;
1019                 }
1020         }
1021 }
1022
1023 void rdma_destroy_id(struct rdma_cm_id *id)
1024 {
1025         struct rdma_id_private *id_priv;
1026         enum rdma_cm_state state;
1027
1028         id_priv = container_of(id, struct rdma_id_private, id);
1029         state = cma_exch(id_priv, RDMA_CM_DESTROYING);
1030         cma_cancel_operation(id_priv, state);
1031
1032         /*
1033          * Wait for any active callback to finish.  New callbacks will find
1034          * the id_priv state set to destroying and abort.
1035          */
1036         mutex_lock(&id_priv->handler_mutex);
1037         mutex_unlock(&id_priv->handler_mutex);
1038
1039         if (id_priv->cma_dev) {
1040                 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
1041                 case RDMA_TRANSPORT_IB:
1042                         if (id_priv->cm_id.ib)
1043                                 ib_destroy_cm_id(id_priv->cm_id.ib);
1044                         break;
1045                 case RDMA_TRANSPORT_IWARP:
1046                         if (id_priv->cm_id.iw)
1047                                 iw_destroy_cm_id(id_priv->cm_id.iw);
1048                         break;
1049                 default:
1050                         break;
1051                 }
1052                 cma_leave_mc_groups(id_priv);
1053                 cma_release_dev(id_priv);
1054         }
1055
1056         cma_release_port(id_priv);
1057         cma_deref_id(id_priv);
1058         wait_for_completion(&id_priv->comp);
1059
1060         if (id_priv->internal_id)
1061                 cma_deref_id(id_priv->id.context);
1062
1063         kfree(id_priv->id.route.path_rec);
1064         kfree(id_priv);
1065 }
1066 EXPORT_SYMBOL(rdma_destroy_id);
1067
1068 static int cma_rep_recv(struct rdma_id_private *id_priv)
1069 {
1070         int ret;
1071
1072         ret = cma_modify_qp_rtr(id_priv, NULL);
1073         if (ret)
1074                 goto reject;
1075
1076         ret = cma_modify_qp_rts(id_priv, NULL);
1077         if (ret)
1078                 goto reject;
1079
1080         ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
1081         if (ret)
1082                 goto reject;
1083
1084         return 0;
1085 reject:
1086         cma_modify_qp_err(id_priv);
1087         ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
1088                        NULL, 0, NULL, 0);
1089         return ret;
1090 }
1091
1092 static void cma_set_rep_event_data(struct rdma_cm_event *event,
1093                                    struct ib_cm_rep_event_param *rep_data,
1094                                    void *private_data)
1095 {
1096         event->param.conn.private_data = private_data;
1097         event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
1098         event->param.conn.responder_resources = rep_data->responder_resources;
1099         event->param.conn.initiator_depth = rep_data->initiator_depth;
1100         event->param.conn.flow_control = rep_data->flow_control;
1101         event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
1102         event->param.conn.srq = rep_data->srq;
1103         event->param.conn.qp_num = rep_data->remote_qpn;
1104 }
1105
1106 static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1107 {
1108         struct rdma_id_private *id_priv = cm_id->context;
1109         struct rdma_cm_event event;
1110         int ret = 0;
1111
1112         if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
1113                 cma_disable_callback(id_priv, RDMA_CM_CONNECT)) ||
1114             (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
1115                 cma_disable_callback(id_priv, RDMA_CM_DISCONNECT)))
1116                 return 0;
1117
1118         memset(&event, 0, sizeof event);
1119         switch (ib_event->event) {
1120         case IB_CM_REQ_ERROR:
1121         case IB_CM_REP_ERROR:
1122                 event.event = RDMA_CM_EVENT_UNREACHABLE;
1123                 event.status = -ETIMEDOUT;
1124                 break;
1125         case IB_CM_REP_RECEIVED:
1126                 if (id_priv->id.qp) {
1127                         event.status = cma_rep_recv(id_priv);
1128                         event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
1129                                                      RDMA_CM_EVENT_ESTABLISHED;
1130                 } else {
1131                         event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
1132                 }
1133                 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
1134                                        ib_event->private_data);
1135                 break;
1136         case IB_CM_RTU_RECEIVED:
1137         case IB_CM_USER_ESTABLISHED:
1138                 event.event = RDMA_CM_EVENT_ESTABLISHED;
1139                 break;
1140         case IB_CM_DREQ_ERROR:
1141                 event.status = -ETIMEDOUT; /* fall through */
1142         case IB_CM_DREQ_RECEIVED:
1143         case IB_CM_DREP_RECEIVED:
1144                 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT,
1145                                    RDMA_CM_DISCONNECT))
1146                         goto out;
1147                 event.event = RDMA_CM_EVENT_DISCONNECTED;
1148                 break;
1149         case IB_CM_TIMEWAIT_EXIT:
1150                 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
1151                 break;
1152         case IB_CM_MRA_RECEIVED:
1153                 /* ignore event */
1154                 goto out;
1155         case IB_CM_REJ_RECEIVED:
1156                 cma_modify_qp_err(id_priv);
1157                 event.status = ib_event->param.rej_rcvd.reason;
1158                 event.event = RDMA_CM_EVENT_REJECTED;
1159                 event.param.conn.private_data = ib_event->private_data;
1160                 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
1161                 break;
1162         default:
1163                 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
1164                        ib_event->event);
1165                 goto out;
1166         }
1167
1168         ret = id_priv->id.event_handler(&id_priv->id, &event);
1169         if (ret) {
1170                 /* Destroy the CM ID by returning a non-zero value. */
1171                 id_priv->cm_id.ib = NULL;
1172                 cma_exch(id_priv, RDMA_CM_DESTROYING);
1173                 mutex_unlock(&id_priv->handler_mutex);
1174                 rdma_destroy_id(&id_priv->id);
1175                 return ret;
1176         }
1177 out:
1178         mutex_unlock(&id_priv->handler_mutex);
1179         return ret;
1180 }
1181
1182 static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
1183                                                struct ib_cm_event *ib_event)
1184 {
1185         struct rdma_id_private *id_priv;
1186         struct rdma_cm_id *id;
1187         struct rdma_route *rt;
1188         int ret;
1189
1190         id = rdma_create_id(listen_id->event_handler, listen_id->context,
1191                             listen_id->ps, ib_event->param.req_rcvd.qp_type);
1192         if (IS_ERR(id))
1193                 return NULL;
1194
1195         id_priv = container_of(id, struct rdma_id_private, id);
1196         if (cma_save_net_info(id, listen_id, ib_event))
1197                 goto err;
1198
1199         rt = &id->route;
1200         rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
1201         rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
1202                                GFP_KERNEL);
1203         if (!rt->path_rec)
1204                 goto err;
1205
1206         rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
1207         if (rt->num_paths == 2)
1208                 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1209
1210         if (cma_any_addr(cma_src_addr(id_priv))) {
1211                 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
1212                 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
1213                 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
1214         } else {
1215                 ret = cma_translate_addr(cma_src_addr(id_priv), &rt->addr.dev_addr);
1216                 if (ret)
1217                         goto err;
1218         }
1219         rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
1220
1221         id_priv->state = RDMA_CM_CONNECT;
1222         return id_priv;
1223
1224 err:
1225         rdma_destroy_id(id);
1226         return NULL;
1227 }
1228
1229 static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
1230                                               struct ib_cm_event *ib_event)
1231 {
1232         struct rdma_id_private *id_priv;
1233         struct rdma_cm_id *id;
1234         int ret;
1235
1236         id = rdma_create_id(listen_id->event_handler, listen_id->context,
1237                             listen_id->ps, IB_QPT_UD);
1238         if (IS_ERR(id))
1239                 return NULL;
1240
1241         id_priv = container_of(id, struct rdma_id_private, id);
1242         if (cma_save_net_info(id, listen_id, ib_event))
1243                 goto err;
1244
1245         if (!cma_any_addr((struct sockaddr *) &id->route.addr.src_addr)) {
1246                 ret = cma_translate_addr(cma_src_addr(id_priv), &id->route.addr.dev_addr);
1247                 if (ret)
1248                         goto err;
1249         }
1250
1251         id_priv->state = RDMA_CM_CONNECT;
1252         return id_priv;
1253 err:
1254         rdma_destroy_id(id);
1255         return NULL;
1256 }
1257
1258 static void cma_set_req_event_data(struct rdma_cm_event *event,
1259                                    struct ib_cm_req_event_param *req_data,
1260                                    void *private_data, int offset)
1261 {
1262         event->param.conn.private_data = private_data + offset;
1263         event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1264         event->param.conn.responder_resources = req_data->responder_resources;
1265         event->param.conn.initiator_depth = req_data->initiator_depth;
1266         event->param.conn.flow_control = req_data->flow_control;
1267         event->param.conn.retry_count = req_data->retry_count;
1268         event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1269         event->param.conn.srq = req_data->srq;
1270         event->param.conn.qp_num = req_data->remote_qpn;
1271 }
1272
1273 static int cma_check_req_qp_type(struct rdma_cm_id *id, struct ib_cm_event *ib_event)
1274 {
1275         return (((ib_event->event == IB_CM_REQ_RECEIVED) &&
1276                  (ib_event->param.req_rcvd.qp_type == id->qp_type)) ||
1277                 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) &&
1278                  (id->qp_type == IB_QPT_UD)) ||
1279                 (!id->qp_type));
1280 }
1281
1282 static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1283 {
1284         struct rdma_id_private *listen_id, *conn_id;
1285         struct rdma_cm_event event;
1286         int offset, ret;
1287
1288         listen_id = cm_id->context;
1289         if (!cma_check_req_qp_type(&listen_id->id, ib_event))
1290                 return -EINVAL;
1291
1292         if (cma_disable_callback(listen_id, RDMA_CM_LISTEN))
1293                 return -ECONNABORTED;
1294
1295         memset(&event, 0, sizeof event);
1296         offset = cma_user_data_offset(listen_id);
1297         event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1298         if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) {
1299                 conn_id = cma_new_udp_id(&listen_id->id, ib_event);
1300                 event.param.ud.private_data = ib_event->private_data + offset;
1301                 event.param.ud.private_data_len =
1302                                 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1303         } else {
1304                 conn_id = cma_new_conn_id(&listen_id->id, ib_event);
1305                 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1306                                        ib_event->private_data, offset);
1307         }
1308         if (!conn_id) {
1309                 ret = -ENOMEM;
1310                 goto err1;
1311         }
1312
1313         mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
1314         ret = cma_acquire_dev(conn_id, listen_id);
1315         if (ret)
1316                 goto err2;
1317
1318         conn_id->cm_id.ib = cm_id;
1319         cm_id->context = conn_id;
1320         cm_id->cm_handler = cma_ib_handler;
1321
1322         /*
1323          * Protect against the user destroying conn_id from another thread
1324          * until we're done accessing it.
1325          */
1326         atomic_inc(&conn_id->refcount);
1327         ret = conn_id->id.event_handler(&conn_id->id, &event);
1328         if (ret)
1329                 goto err3;
1330         /*
1331          * Acquire mutex to prevent user executing rdma_destroy_id()
1332          * while we're accessing the cm_id.
1333          */
1334         mutex_lock(&lock);
1335         if (cma_comp(conn_id, RDMA_CM_CONNECT) &&
1336             (conn_id->id.qp_type != IB_QPT_UD))
1337                 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1338         mutex_unlock(&lock);
1339         mutex_unlock(&conn_id->handler_mutex);
1340         mutex_unlock(&listen_id->handler_mutex);
1341         cma_deref_id(conn_id);
1342         return 0;
1343
1344 err3:
1345         cma_deref_id(conn_id);
1346         /* Destroy the CM ID by returning a non-zero value. */
1347         conn_id->cm_id.ib = NULL;
1348 err2:
1349         cma_exch(conn_id, RDMA_CM_DESTROYING);
1350         mutex_unlock(&conn_id->handler_mutex);
1351 err1:
1352         mutex_unlock(&listen_id->handler_mutex);
1353         if (conn_id)
1354                 rdma_destroy_id(&conn_id->id);
1355         return ret;
1356 }
1357
1358 __be64 rdma_get_service_id(struct rdma_cm_id *id, struct sockaddr *addr)
1359 {
1360         if (addr->sa_family == AF_IB)
1361                 return ((struct sockaddr_ib *) addr)->sib_sid;
1362
1363         return cpu_to_be64(((u64)id->ps << 16) + be16_to_cpu(cma_port(addr)));
1364 }
1365 EXPORT_SYMBOL(rdma_get_service_id);
1366
1367 static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr,
1368                                  struct ib_cm_compare_data *compare)
1369 {
1370         struct cma_hdr *cma_data, *cma_mask;
1371         __be32 ip4_addr;
1372         struct in6_addr ip6_addr;
1373
1374         memset(compare, 0, sizeof *compare);
1375         cma_data = (void *) compare->data;
1376         cma_mask = (void *) compare->mask;
1377
1378         switch (addr->sa_family) {
1379         case AF_INET:
1380                 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
1381                 cma_set_ip_ver(cma_data, 4);
1382                 cma_set_ip_ver(cma_mask, 0xF);
1383                 if (!cma_any_addr(addr)) {
1384                         cma_data->dst_addr.ip4.addr = ip4_addr;
1385                         cma_mask->dst_addr.ip4.addr = htonl(~0);
1386                 }
1387                 break;
1388         case AF_INET6:
1389                 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr;
1390                 cma_set_ip_ver(cma_data, 6);
1391                 cma_set_ip_ver(cma_mask, 0xF);
1392                 if (!cma_any_addr(addr)) {
1393                         cma_data->dst_addr.ip6 = ip6_addr;
1394                         memset(&cma_mask->dst_addr.ip6, 0xFF,
1395                                sizeof cma_mask->dst_addr.ip6);
1396                 }
1397                 break;
1398         default:
1399                 break;
1400         }
1401 }
1402
1403 static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
1404 {
1405         struct rdma_id_private *id_priv = iw_id->context;
1406         struct rdma_cm_event event;
1407         int ret = 0;
1408         struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
1409         struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
1410
1411         if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
1412                 return 0;
1413
1414         memset(&event, 0, sizeof event);
1415         switch (iw_event->event) {
1416         case IW_CM_EVENT_CLOSE:
1417                 event.event = RDMA_CM_EVENT_DISCONNECTED;
1418                 break;
1419         case IW_CM_EVENT_CONNECT_REPLY:
1420                 memcpy(cma_src_addr(id_priv), laddr,
1421                        rdma_addr_size(laddr));
1422                 memcpy(cma_dst_addr(id_priv), raddr,
1423                        rdma_addr_size(raddr));
1424                 switch (iw_event->status) {
1425                 case 0:
1426                         event.event = RDMA_CM_EVENT_ESTABLISHED;
1427                         event.param.conn.initiator_depth = iw_event->ird;
1428                         event.param.conn.responder_resources = iw_event->ord;
1429                         break;
1430                 case -ECONNRESET:
1431                 case -ECONNREFUSED:
1432                         event.event = RDMA_CM_EVENT_REJECTED;
1433                         break;
1434                 case -ETIMEDOUT:
1435                         event.event = RDMA_CM_EVENT_UNREACHABLE;
1436                         break;
1437                 default:
1438                         event.event = RDMA_CM_EVENT_CONNECT_ERROR;
1439                         break;
1440                 }
1441                 break;
1442         case IW_CM_EVENT_ESTABLISHED:
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         default:
1448                 BUG_ON(1);
1449         }
1450
1451         event.status = iw_event->status;
1452         event.param.conn.private_data = iw_event->private_data;
1453         event.param.conn.private_data_len = iw_event->private_data_len;
1454         ret = id_priv->id.event_handler(&id_priv->id, &event);
1455         if (ret) {
1456                 /* Destroy the CM ID by returning a non-zero value. */
1457                 id_priv->cm_id.iw = NULL;
1458                 cma_exch(id_priv, RDMA_CM_DESTROYING);
1459                 mutex_unlock(&id_priv->handler_mutex);
1460                 rdma_destroy_id(&id_priv->id);
1461                 return ret;
1462         }
1463
1464         mutex_unlock(&id_priv->handler_mutex);
1465         return ret;
1466 }
1467
1468 static int iw_conn_req_handler(struct iw_cm_id *cm_id,
1469                                struct iw_cm_event *iw_event)
1470 {
1471         struct rdma_cm_id *new_cm_id;
1472         struct rdma_id_private *listen_id, *conn_id;
1473         struct rdma_cm_event event;
1474         int ret;
1475         struct ib_device_attr attr;
1476         struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
1477         struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
1478
1479         listen_id = cm_id->context;
1480         if (cma_disable_callback(listen_id, RDMA_CM_LISTEN))
1481                 return -ECONNABORTED;
1482
1483         /* Create a new RDMA id for the new IW CM ID */
1484         new_cm_id = rdma_create_id(listen_id->id.event_handler,
1485                                    listen_id->id.context,
1486                                    RDMA_PS_TCP, IB_QPT_RC);
1487         if (IS_ERR(new_cm_id)) {
1488                 ret = -ENOMEM;
1489                 goto out;
1490         }
1491         conn_id = container_of(new_cm_id, struct rdma_id_private, id);
1492         mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
1493         conn_id->state = RDMA_CM_CONNECT;
1494
1495         ret = rdma_translate_ip(laddr, &conn_id->id.route.addr.dev_addr, NULL);
1496         if (ret) {
1497                 mutex_unlock(&conn_id->handler_mutex);
1498                 rdma_destroy_id(new_cm_id);
1499                 goto out;
1500         }
1501
1502         ret = cma_acquire_dev(conn_id, listen_id);
1503         if (ret) {
1504                 mutex_unlock(&conn_id->handler_mutex);
1505                 rdma_destroy_id(new_cm_id);
1506                 goto out;
1507         }
1508
1509         conn_id->cm_id.iw = cm_id;
1510         cm_id->context = conn_id;
1511         cm_id->cm_handler = cma_iw_handler;
1512
1513         memcpy(cma_src_addr(conn_id), laddr, rdma_addr_size(laddr));
1514         memcpy(cma_dst_addr(conn_id), raddr, rdma_addr_size(raddr));
1515
1516         ret = ib_query_device(conn_id->id.device, &attr);
1517         if (ret) {
1518                 mutex_unlock(&conn_id->handler_mutex);
1519                 rdma_destroy_id(new_cm_id);
1520                 goto out;
1521         }
1522
1523         memset(&event, 0, sizeof event);
1524         event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1525         event.param.conn.private_data = iw_event->private_data;
1526         event.param.conn.private_data_len = iw_event->private_data_len;
1527         event.param.conn.initiator_depth = iw_event->ird;
1528         event.param.conn.responder_resources = iw_event->ord;
1529
1530         /*
1531          * Protect against the user destroying conn_id from another thread
1532          * until we're done accessing it.
1533          */
1534         atomic_inc(&conn_id->refcount);
1535         ret = conn_id->id.event_handler(&conn_id->id, &event);
1536         if (ret) {
1537                 /* User wants to destroy the CM ID */
1538                 conn_id->cm_id.iw = NULL;
1539                 cma_exch(conn_id, RDMA_CM_DESTROYING);
1540                 mutex_unlock(&conn_id->handler_mutex);
1541                 cma_deref_id(conn_id);
1542                 rdma_destroy_id(&conn_id->id);
1543                 goto out;
1544         }
1545
1546         mutex_unlock(&conn_id->handler_mutex);
1547         cma_deref_id(conn_id);
1548
1549 out:
1550         mutex_unlock(&listen_id->handler_mutex);
1551         return ret;
1552 }
1553
1554 static int cma_ib_listen(struct rdma_id_private *id_priv)
1555 {
1556         struct ib_cm_compare_data compare_data;
1557         struct sockaddr *addr;
1558         struct ib_cm_id *id;
1559         __be64 svc_id;
1560         int ret;
1561
1562         id = ib_create_cm_id(id_priv->id.device, cma_req_handler, id_priv);
1563         if (IS_ERR(id))
1564                 return PTR_ERR(id);
1565
1566         id_priv->cm_id.ib = id;
1567
1568         addr = cma_src_addr(id_priv);
1569         svc_id = rdma_get_service_id(&id_priv->id, addr);
1570         if (cma_any_addr(addr) && !id_priv->afonly)
1571                 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL);
1572         else {
1573                 cma_set_compare_data(id_priv->id.ps, addr, &compare_data);
1574                 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data);
1575         }
1576
1577         if (ret) {
1578                 ib_destroy_cm_id(id_priv->cm_id.ib);
1579                 id_priv->cm_id.ib = NULL;
1580         }
1581
1582         return ret;
1583 }
1584
1585 static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
1586 {
1587         int ret;
1588         struct iw_cm_id *id;
1589
1590         id = iw_create_cm_id(id_priv->id.device,
1591                              iw_conn_req_handler,
1592                              id_priv);
1593         if (IS_ERR(id))
1594                 return PTR_ERR(id);
1595
1596         id_priv->cm_id.iw = id;
1597
1598         memcpy(&id_priv->cm_id.iw->local_addr, cma_src_addr(id_priv),
1599                rdma_addr_size(cma_src_addr(id_priv)));
1600
1601         ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
1602
1603         if (ret) {
1604                 iw_destroy_cm_id(id_priv->cm_id.iw);
1605                 id_priv->cm_id.iw = NULL;
1606         }
1607
1608         return ret;
1609 }
1610
1611 static int cma_listen_handler(struct rdma_cm_id *id,
1612                               struct rdma_cm_event *event)
1613 {
1614         struct rdma_id_private *id_priv = id->context;
1615
1616         id->context = id_priv->id.context;
1617         id->event_handler = id_priv->id.event_handler;
1618         return id_priv->id.event_handler(id, event);
1619 }
1620
1621 static void cma_listen_on_dev(struct rdma_id_private *id_priv,
1622                               struct cma_device *cma_dev)
1623 {
1624         struct rdma_id_private *dev_id_priv;
1625         struct rdma_cm_id *id;
1626         int ret;
1627
1628         if (cma_family(id_priv) == AF_IB &&
1629             rdma_node_get_transport(cma_dev->device->node_type) != RDMA_TRANSPORT_IB)
1630                 return;
1631
1632         id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps,
1633                             id_priv->id.qp_type);
1634         if (IS_ERR(id))
1635                 return;
1636
1637         dev_id_priv = container_of(id, struct rdma_id_private, id);
1638
1639         dev_id_priv->state = RDMA_CM_ADDR_BOUND;
1640         memcpy(cma_src_addr(dev_id_priv), cma_src_addr(id_priv),
1641                rdma_addr_size(cma_src_addr(id_priv)));
1642
1643         cma_attach_to_dev(dev_id_priv, cma_dev);
1644         list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
1645         atomic_inc(&id_priv->refcount);
1646         dev_id_priv->internal_id = 1;
1647         dev_id_priv->afonly = id_priv->afonly;
1648
1649         ret = rdma_listen(id, id_priv->backlog);
1650         if (ret)
1651                 printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, "
1652                        "listening on device %s\n", ret, cma_dev->device->name);
1653 }
1654
1655 static void cma_listen_on_all(struct rdma_id_private *id_priv)
1656 {
1657         struct cma_device *cma_dev;
1658
1659         mutex_lock(&lock);
1660         list_add_tail(&id_priv->list, &listen_any_list);
1661         list_for_each_entry(cma_dev, &dev_list, list)
1662                 cma_listen_on_dev(id_priv, cma_dev);
1663         mutex_unlock(&lock);
1664 }
1665
1666 void rdma_set_service_type(struct rdma_cm_id *id, int tos)
1667 {
1668         struct rdma_id_private *id_priv;
1669
1670         id_priv = container_of(id, struct rdma_id_private, id);
1671         id_priv->tos = (u8) tos;
1672 }
1673 EXPORT_SYMBOL(rdma_set_service_type);
1674
1675 static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
1676                               void *context)
1677 {
1678         struct cma_work *work = context;
1679         struct rdma_route *route;
1680
1681         route = &work->id->id.route;
1682
1683         if (!status) {
1684                 route->num_paths = 1;
1685                 *route->path_rec = *path_rec;
1686         } else {
1687                 work->old_state = RDMA_CM_ROUTE_QUERY;
1688                 work->new_state = RDMA_CM_ADDR_RESOLVED;
1689                 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
1690                 work->event.status = status;
1691         }
1692
1693         queue_work(cma_wq, &work->work);
1694 }
1695
1696 static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
1697                               struct cma_work *work)
1698 {
1699         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
1700         struct ib_sa_path_rec path_rec;
1701         ib_sa_comp_mask comp_mask;
1702         struct sockaddr_in6 *sin6;
1703         struct sockaddr_ib *sib;
1704
1705         memset(&path_rec, 0, sizeof path_rec);
1706         rdma_addr_get_sgid(dev_addr, &path_rec.sgid);
1707         rdma_addr_get_dgid(dev_addr, &path_rec.dgid);
1708         path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
1709         path_rec.numb_path = 1;
1710         path_rec.reversible = 1;
1711         path_rec.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
1712
1713         comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
1714                     IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
1715                     IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
1716
1717         switch (cma_family(id_priv)) {
1718         case AF_INET:
1719                 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
1720                 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
1721                 break;
1722         case AF_INET6:
1723                 sin6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
1724                 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
1725                 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
1726                 break;
1727         case AF_IB:
1728                 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
1729                 path_rec.traffic_class = (u8) (be32_to_cpu(sib->sib_flowinfo) >> 20);
1730                 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
1731                 break;
1732         }
1733
1734         id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
1735                                                id_priv->id.port_num, &path_rec,
1736                                                comp_mask, timeout_ms,
1737                                                GFP_KERNEL, cma_query_handler,
1738                                                work, &id_priv->query);
1739
1740         return (id_priv->query_id < 0) ? id_priv->query_id : 0;
1741 }
1742
1743 static void cma_work_handler(struct work_struct *_work)
1744 {
1745         struct cma_work *work = container_of(_work, struct cma_work, work);
1746         struct rdma_id_private *id_priv = work->id;
1747         int destroy = 0;
1748
1749         mutex_lock(&id_priv->handler_mutex);
1750         if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
1751                 goto out;
1752
1753         if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1754                 cma_exch(id_priv, RDMA_CM_DESTROYING);
1755                 destroy = 1;
1756         }
1757 out:
1758         mutex_unlock(&id_priv->handler_mutex);
1759         cma_deref_id(id_priv);
1760         if (destroy)
1761                 rdma_destroy_id(&id_priv->id);
1762         kfree(work);
1763 }
1764
1765 static void cma_ndev_work_handler(struct work_struct *_work)
1766 {
1767         struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
1768         struct rdma_id_private *id_priv = work->id;
1769         int destroy = 0;
1770
1771         mutex_lock(&id_priv->handler_mutex);
1772         if (id_priv->state == RDMA_CM_DESTROYING ||
1773             id_priv->state == RDMA_CM_DEVICE_REMOVAL)
1774                 goto out;
1775
1776         if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1777                 cma_exch(id_priv, RDMA_CM_DESTROYING);
1778                 destroy = 1;
1779         }
1780
1781 out:
1782         mutex_unlock(&id_priv->handler_mutex);
1783         cma_deref_id(id_priv);
1784         if (destroy)
1785                 rdma_destroy_id(&id_priv->id);
1786         kfree(work);
1787 }
1788
1789 static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
1790 {
1791         struct rdma_route *route = &id_priv->id.route;
1792         struct cma_work *work;
1793         int ret;
1794
1795         work = kzalloc(sizeof *work, GFP_KERNEL);
1796         if (!work)
1797                 return -ENOMEM;
1798
1799         work->id = id_priv;
1800         INIT_WORK(&work->work, cma_work_handler);
1801         work->old_state = RDMA_CM_ROUTE_QUERY;
1802         work->new_state = RDMA_CM_ROUTE_RESOLVED;
1803         work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1804
1805         route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
1806         if (!route->path_rec) {
1807                 ret = -ENOMEM;
1808                 goto err1;
1809         }
1810
1811         ret = cma_query_ib_route(id_priv, timeout_ms, work);
1812         if (ret)
1813                 goto err2;
1814
1815         return 0;
1816 err2:
1817         kfree(route->path_rec);
1818         route->path_rec = NULL;
1819 err1:
1820         kfree(work);
1821         return ret;
1822 }
1823
1824 int rdma_set_ib_paths(struct rdma_cm_id *id,
1825                       struct ib_sa_path_rec *path_rec, int num_paths)
1826 {
1827         struct rdma_id_private *id_priv;
1828         int ret;
1829
1830         id_priv = container_of(id, struct rdma_id_private, id);
1831         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
1832                            RDMA_CM_ROUTE_RESOLVED))
1833                 return -EINVAL;
1834
1835         id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths,
1836                                      GFP_KERNEL);
1837         if (!id->route.path_rec) {
1838                 ret = -ENOMEM;
1839                 goto err;
1840         }
1841
1842         id->route.num_paths = num_paths;
1843         return 0;
1844 err:
1845         cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED);
1846         return ret;
1847 }
1848 EXPORT_SYMBOL(rdma_set_ib_paths);
1849
1850 static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
1851 {
1852         struct cma_work *work;
1853
1854         work = kzalloc(sizeof *work, GFP_KERNEL);
1855         if (!work)
1856                 return -ENOMEM;
1857
1858         work->id = id_priv;
1859         INIT_WORK(&work->work, cma_work_handler);
1860         work->old_state = RDMA_CM_ROUTE_QUERY;
1861         work->new_state = RDMA_CM_ROUTE_RESOLVED;
1862         work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1863         queue_work(cma_wq, &work->work);
1864         return 0;
1865 }
1866
1867 static int iboe_tos_to_sl(struct net_device *ndev, int tos)
1868 {
1869         int prio;
1870         struct net_device *dev;
1871
1872         prio = rt_tos2priority(tos);
1873         dev = ndev->priv_flags & IFF_802_1Q_VLAN ?
1874                 vlan_dev_real_dev(ndev) : ndev;
1875
1876         if (dev->num_tc)
1877                 return netdev_get_prio_tc_map(dev, prio);
1878
1879 #if IS_ENABLED(CONFIG_VLAN_8021Q)
1880         if (ndev->priv_flags & IFF_802_1Q_VLAN)
1881                 return (vlan_dev_get_egress_qos_mask(ndev, prio) &
1882                         VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
1883 #endif
1884         return 0;
1885 }
1886
1887 static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
1888 {
1889         struct rdma_route *route = &id_priv->id.route;
1890         struct rdma_addr *addr = &route->addr;
1891         struct cma_work *work;
1892         int ret;
1893         struct net_device *ndev = NULL;
1894
1895
1896         work = kzalloc(sizeof *work, GFP_KERNEL);
1897         if (!work)
1898                 return -ENOMEM;
1899
1900         work->id = id_priv;
1901         INIT_WORK(&work->work, cma_work_handler);
1902
1903         route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
1904         if (!route->path_rec) {
1905                 ret = -ENOMEM;
1906                 goto err1;
1907         }
1908
1909         route->num_paths = 1;
1910
1911         if (addr->dev_addr.bound_dev_if)
1912                 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if);
1913         if (!ndev) {
1914                 ret = -ENODEV;
1915                 goto err2;
1916         }
1917
1918         route->path_rec->vlan_id = rdma_vlan_dev_vlan_id(ndev);
1919         memcpy(route->path_rec->dmac, addr->dev_addr.dst_dev_addr, ETH_ALEN);
1920         memcpy(route->path_rec->smac, ndev->dev_addr, ndev->addr_len);
1921
1922         rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
1923                     &route->path_rec->sgid);
1924         rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.dst_addr,
1925                     &route->path_rec->dgid);
1926
1927         route->path_rec->hop_limit = 1;
1928         route->path_rec->reversible = 1;
1929         route->path_rec->pkey = cpu_to_be16(0xffff);
1930         route->path_rec->mtu_selector = IB_SA_EQ;
1931         route->path_rec->sl = iboe_tos_to_sl(ndev, id_priv->tos);
1932         route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
1933         route->path_rec->rate_selector = IB_SA_EQ;
1934         route->path_rec->rate = iboe_get_rate(ndev);
1935         dev_put(ndev);
1936         route->path_rec->packet_life_time_selector = IB_SA_EQ;
1937         route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
1938         if (!route->path_rec->mtu) {
1939                 ret = -EINVAL;
1940                 goto err2;
1941         }
1942
1943         work->old_state = RDMA_CM_ROUTE_QUERY;
1944         work->new_state = RDMA_CM_ROUTE_RESOLVED;
1945         work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1946         work->event.status = 0;
1947
1948         queue_work(cma_wq, &work->work);
1949
1950         return 0;
1951
1952 err2:
1953         kfree(route->path_rec);
1954         route->path_rec = NULL;
1955 err1:
1956         kfree(work);
1957         return ret;
1958 }
1959
1960 int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
1961 {
1962         struct rdma_id_private *id_priv;
1963         int ret;
1964
1965         id_priv = container_of(id, struct rdma_id_private, id);
1966         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY))
1967                 return -EINVAL;
1968
1969         atomic_inc(&id_priv->refcount);
1970         switch (rdma_node_get_transport(id->device->node_type)) {
1971         case RDMA_TRANSPORT_IB:
1972                 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
1973                 case IB_LINK_LAYER_INFINIBAND:
1974                         ret = cma_resolve_ib_route(id_priv, timeout_ms);
1975                         break;
1976                 case IB_LINK_LAYER_ETHERNET:
1977                         ret = cma_resolve_iboe_route(id_priv);
1978                         break;
1979                 default:
1980                         ret = -ENOSYS;
1981                 }
1982                 break;
1983         case RDMA_TRANSPORT_IWARP:
1984                 ret = cma_resolve_iw_route(id_priv, timeout_ms);
1985                 break;
1986         default:
1987                 ret = -ENOSYS;
1988                 break;
1989         }
1990         if (ret)
1991                 goto err;
1992
1993         return 0;
1994 err:
1995         cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED);
1996         cma_deref_id(id_priv);
1997         return ret;
1998 }
1999 EXPORT_SYMBOL(rdma_resolve_route);
2000
2001 static void cma_set_loopback(struct sockaddr *addr)
2002 {
2003         switch (addr->sa_family) {
2004         case AF_INET:
2005                 ((struct sockaddr_in *) addr)->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
2006                 break;
2007         case AF_INET6:
2008                 ipv6_addr_set(&((struct sockaddr_in6 *) addr)->sin6_addr,
2009                               0, 0, 0, htonl(1));
2010                 break;
2011         default:
2012                 ib_addr_set(&((struct sockaddr_ib *) addr)->sib_addr,
2013                             0, 0, 0, htonl(1));
2014                 break;
2015         }
2016 }
2017
2018 static int cma_bind_loopback(struct rdma_id_private *id_priv)
2019 {
2020         struct cma_device *cma_dev, *cur_dev;
2021         struct ib_port_attr port_attr;
2022         union ib_gid gid;
2023         u16 pkey;
2024         int ret;
2025         u8 p;
2026
2027         cma_dev = NULL;
2028         mutex_lock(&lock);
2029         list_for_each_entry(cur_dev, &dev_list, list) {
2030                 if (cma_family(id_priv) == AF_IB &&
2031                     rdma_node_get_transport(cur_dev->device->node_type) != RDMA_TRANSPORT_IB)
2032                         continue;
2033
2034                 if (!cma_dev)
2035                         cma_dev = cur_dev;
2036
2037                 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
2038                         if (!ib_query_port(cur_dev->device, p, &port_attr) &&
2039                             port_attr.state == IB_PORT_ACTIVE) {
2040                                 cma_dev = cur_dev;
2041                                 goto port_found;
2042                         }
2043                 }
2044         }
2045
2046         if (!cma_dev) {
2047                 ret = -ENODEV;
2048                 goto out;
2049         }
2050
2051         p = 1;
2052
2053 port_found:
2054         ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid);
2055         if (ret)
2056                 goto out;
2057
2058         ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
2059         if (ret)
2060                 goto out;
2061
2062         id_priv->id.route.addr.dev_addr.dev_type =
2063                 (rdma_port_get_link_layer(cma_dev->device, p) == IB_LINK_LAYER_INFINIBAND) ?
2064                 ARPHRD_INFINIBAND : ARPHRD_ETHER;
2065
2066         rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2067         ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
2068         id_priv->id.port_num = p;
2069         cma_attach_to_dev(id_priv, cma_dev);
2070         cma_set_loopback(cma_src_addr(id_priv));
2071 out:
2072         mutex_unlock(&lock);
2073         return ret;
2074 }
2075
2076 static void addr_handler(int status, struct sockaddr *src_addr,
2077                          struct rdma_dev_addr *dev_addr, void *context)
2078 {
2079         struct rdma_id_private *id_priv = context;
2080         struct rdma_cm_event event;
2081
2082         memset(&event, 0, sizeof event);
2083         mutex_lock(&id_priv->handler_mutex);
2084         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY,
2085                            RDMA_CM_ADDR_RESOLVED))
2086                 goto out;
2087
2088         memcpy(cma_src_addr(id_priv), src_addr, rdma_addr_size(src_addr));
2089         if (!status && !id_priv->cma_dev)
2090                 status = cma_acquire_dev(id_priv, NULL);
2091
2092         if (status) {
2093                 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2094                                    RDMA_CM_ADDR_BOUND))
2095                         goto out;
2096                 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2097                 event.status = status;
2098         } else
2099                 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2100
2101         if (id_priv->id.event_handler(&id_priv->id, &event)) {
2102                 cma_exch(id_priv, RDMA_CM_DESTROYING);
2103                 mutex_unlock(&id_priv->handler_mutex);
2104                 cma_deref_id(id_priv);
2105                 rdma_destroy_id(&id_priv->id);
2106                 return;
2107         }
2108 out:
2109         mutex_unlock(&id_priv->handler_mutex);
2110         cma_deref_id(id_priv);
2111 }
2112
2113 static int cma_resolve_loopback(struct rdma_id_private *id_priv)
2114 {
2115         struct cma_work *work;
2116         union ib_gid gid;
2117         int ret;
2118
2119         work = kzalloc(sizeof *work, GFP_KERNEL);
2120         if (!work)
2121                 return -ENOMEM;
2122
2123         if (!id_priv->cma_dev) {
2124                 ret = cma_bind_loopback(id_priv);
2125                 if (ret)
2126                         goto err;
2127         }
2128
2129         rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2130         rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
2131
2132         work->id = id_priv;
2133         INIT_WORK(&work->work, cma_work_handler);
2134         work->old_state = RDMA_CM_ADDR_QUERY;
2135         work->new_state = RDMA_CM_ADDR_RESOLVED;
2136         work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2137         queue_work(cma_wq, &work->work);
2138         return 0;
2139 err:
2140         kfree(work);
2141         return ret;
2142 }
2143
2144 static int cma_resolve_ib_addr(struct rdma_id_private *id_priv)
2145 {
2146         struct cma_work *work;
2147         int ret;
2148
2149         work = kzalloc(sizeof *work, GFP_KERNEL);
2150         if (!work)
2151                 return -ENOMEM;
2152
2153         if (!id_priv->cma_dev) {
2154                 ret = cma_resolve_ib_dev(id_priv);
2155                 if (ret)
2156                         goto err;
2157         }
2158
2159         rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, (union ib_gid *)
2160                 &(((struct sockaddr_ib *) &id_priv->id.route.addr.dst_addr)->sib_addr));
2161
2162         work->id = id_priv;
2163         INIT_WORK(&work->work, cma_work_handler);
2164         work->old_state = RDMA_CM_ADDR_QUERY;
2165         work->new_state = RDMA_CM_ADDR_RESOLVED;
2166         work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2167         queue_work(cma_wq, &work->work);
2168         return 0;
2169 err:
2170         kfree(work);
2171         return ret;
2172 }
2173
2174 static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2175                          struct sockaddr *dst_addr)
2176 {
2177         if (!src_addr || !src_addr->sa_family) {
2178                 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
2179                 src_addr->sa_family = dst_addr->sa_family;
2180                 if (dst_addr->sa_family == AF_INET6) {
2181                         ((struct sockaddr_in6 *) src_addr)->sin6_scope_id =
2182                                 ((struct sockaddr_in6 *) dst_addr)->sin6_scope_id;
2183                 } else if (dst_addr->sa_family == AF_IB) {
2184                         ((struct sockaddr_ib *) src_addr)->sib_pkey =
2185                                 ((struct sockaddr_ib *) dst_addr)->sib_pkey;
2186                 }
2187         }
2188         return rdma_bind_addr(id, src_addr);
2189 }
2190
2191 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2192                       struct sockaddr *dst_addr, int timeout_ms)
2193 {
2194         struct rdma_id_private *id_priv;
2195         int ret;
2196
2197         id_priv = container_of(id, struct rdma_id_private, id);
2198         if (id_priv->state == RDMA_CM_IDLE) {
2199                 ret = cma_bind_addr(id, src_addr, dst_addr);
2200                 if (ret)
2201                         return ret;
2202         }
2203
2204         if (cma_family(id_priv) != dst_addr->sa_family)
2205                 return -EINVAL;
2206
2207         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY))
2208                 return -EINVAL;
2209
2210         atomic_inc(&id_priv->refcount);
2211         memcpy(cma_dst_addr(id_priv), dst_addr, rdma_addr_size(dst_addr));
2212         if (cma_any_addr(dst_addr)) {
2213                 ret = cma_resolve_loopback(id_priv);
2214         } else {
2215                 if (dst_addr->sa_family == AF_IB) {
2216                         ret = cma_resolve_ib_addr(id_priv);
2217                 } else {
2218                         ret = rdma_resolve_ip(&addr_client, cma_src_addr(id_priv),
2219                                               dst_addr, &id->route.addr.dev_addr,
2220                                               timeout_ms, addr_handler, id_priv);
2221                 }
2222         }
2223         if (ret)
2224                 goto err;
2225
2226         return 0;
2227 err:
2228         cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
2229         cma_deref_id(id_priv);
2230         return ret;
2231 }
2232 EXPORT_SYMBOL(rdma_resolve_addr);
2233
2234 int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
2235 {
2236         struct rdma_id_private *id_priv;
2237         unsigned long flags;
2238         int ret;
2239
2240         id_priv = container_of(id, struct rdma_id_private, id);
2241         spin_lock_irqsave(&id_priv->lock, flags);
2242         if (reuse || id_priv->state == RDMA_CM_IDLE) {
2243                 id_priv->reuseaddr = reuse;
2244                 ret = 0;
2245         } else {
2246                 ret = -EINVAL;
2247         }
2248         spin_unlock_irqrestore(&id_priv->lock, flags);
2249         return ret;
2250 }
2251 EXPORT_SYMBOL(rdma_set_reuseaddr);
2252
2253 int rdma_set_afonly(struct rdma_cm_id *id, int afonly)
2254 {
2255         struct rdma_id_private *id_priv;
2256         unsigned long flags;
2257         int ret;
2258
2259         id_priv = container_of(id, struct rdma_id_private, id);
2260         spin_lock_irqsave(&id_priv->lock, flags);
2261         if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) {
2262                 id_priv->options |= (1 << CMA_OPTION_AFONLY);
2263                 id_priv->afonly = afonly;
2264                 ret = 0;
2265         } else {
2266                 ret = -EINVAL;
2267         }
2268         spin_unlock_irqrestore(&id_priv->lock, flags);
2269         return ret;
2270 }
2271 EXPORT_SYMBOL(rdma_set_afonly);
2272
2273 static void cma_bind_port(struct rdma_bind_list *bind_list,
2274                           struct rdma_id_private *id_priv)
2275 {
2276         struct sockaddr *addr;
2277         struct sockaddr_ib *sib;
2278         u64 sid, mask;
2279         __be16 port;
2280
2281         addr = cma_src_addr(id_priv);
2282         port = htons(bind_list->port);
2283
2284         switch (addr->sa_family) {
2285         case AF_INET:
2286                 ((struct sockaddr_in *) addr)->sin_port = port;
2287                 break;
2288         case AF_INET6:
2289                 ((struct sockaddr_in6 *) addr)->sin6_port = port;
2290                 break;
2291         case AF_IB:
2292                 sib = (struct sockaddr_ib *) addr;
2293                 sid = be64_to_cpu(sib->sib_sid);
2294                 mask = be64_to_cpu(sib->sib_sid_mask);
2295                 sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port));
2296                 sib->sib_sid_mask = cpu_to_be64(~0ULL);
2297                 break;
2298         }
2299         id_priv->bind_list = bind_list;
2300         hlist_add_head(&id_priv->node, &bind_list->owners);
2301 }
2302
2303 static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv,
2304                           unsigned short snum)
2305 {
2306         struct rdma_bind_list *bind_list;
2307         int ret;
2308
2309         bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
2310         if (!bind_list)
2311                 return -ENOMEM;
2312
2313         ret = idr_alloc(ps, bind_list, snum, snum + 1, GFP_KERNEL);
2314         if (ret < 0)
2315                 goto err;
2316
2317         bind_list->ps = ps;
2318         bind_list->port = (unsigned short)ret;
2319         cma_bind_port(bind_list, id_priv);
2320         return 0;
2321 err:
2322         kfree(bind_list);
2323         return ret == -ENOSPC ? -EADDRNOTAVAIL : ret;
2324 }
2325
2326 static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv)
2327 {
2328         static unsigned int last_used_port;
2329         int low, high, remaining;
2330         unsigned int rover;
2331
2332         inet_get_local_port_range(&init_net, &low, &high);
2333         remaining = (high - low) + 1;
2334         rover = prandom_u32() % remaining + low;
2335 retry:
2336         if (last_used_port != rover &&
2337             !idr_find(ps, (unsigned short) rover)) {
2338                 int ret = cma_alloc_port(ps, id_priv, rover);
2339                 /*
2340                  * Remember previously used port number in order to avoid
2341                  * re-using same port immediately after it is closed.
2342                  */
2343                 if (!ret)
2344                         last_used_port = rover;
2345                 if (ret != -EADDRNOTAVAIL)
2346                         return ret;
2347         }
2348         if (--remaining) {
2349                 rover++;
2350                 if ((rover < low) || (rover > high))
2351                         rover = low;
2352                 goto retry;
2353         }
2354         return -EADDRNOTAVAIL;
2355 }
2356
2357 /*
2358  * Check that the requested port is available.  This is called when trying to
2359  * bind to a specific port, or when trying to listen on a bound port.  In
2360  * the latter case, the provided id_priv may already be on the bind_list, but
2361  * we still need to check that it's okay to start listening.
2362  */
2363 static int cma_check_port(struct rdma_bind_list *bind_list,
2364                           struct rdma_id_private *id_priv, uint8_t reuseaddr)
2365 {
2366         struct rdma_id_private *cur_id;
2367         struct sockaddr *addr, *cur_addr;
2368
2369         addr = cma_src_addr(id_priv);
2370         hlist_for_each_entry(cur_id, &bind_list->owners, node) {
2371                 if (id_priv == cur_id)
2372                         continue;
2373
2374                 if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr &&
2375                     cur_id->reuseaddr)
2376                         continue;
2377
2378                 cur_addr = cma_src_addr(cur_id);
2379                 if (id_priv->afonly && cur_id->afonly &&
2380                     (addr->sa_family != cur_addr->sa_family))
2381                         continue;
2382
2383                 if (cma_any_addr(addr) || cma_any_addr(cur_addr))
2384                         return -EADDRNOTAVAIL;
2385
2386                 if (!cma_addr_cmp(addr, cur_addr))
2387                         return -EADDRINUSE;
2388         }
2389         return 0;
2390 }
2391
2392 static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv)
2393 {
2394         struct rdma_bind_list *bind_list;
2395         unsigned short snum;
2396         int ret;
2397
2398         snum = ntohs(cma_port(cma_src_addr(id_priv)));
2399         if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
2400                 return -EACCES;
2401
2402         bind_list = idr_find(ps, snum);
2403         if (!bind_list) {
2404                 ret = cma_alloc_port(ps, id_priv, snum);
2405         } else {
2406                 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
2407                 if (!ret)
2408                         cma_bind_port(bind_list, id_priv);
2409         }
2410         return ret;
2411 }
2412
2413 static int cma_bind_listen(struct rdma_id_private *id_priv)
2414 {
2415         struct rdma_bind_list *bind_list = id_priv->bind_list;
2416         int ret = 0;
2417
2418         mutex_lock(&lock);
2419         if (bind_list->owners.first->next)
2420                 ret = cma_check_port(bind_list, id_priv, 0);
2421         mutex_unlock(&lock);
2422         return ret;
2423 }
2424
2425 static struct idr *cma_select_inet_ps(struct rdma_id_private *id_priv)
2426 {
2427         switch (id_priv->id.ps) {
2428         case RDMA_PS_TCP:
2429                 return &tcp_ps;
2430         case RDMA_PS_UDP:
2431                 return &udp_ps;
2432         case RDMA_PS_IPOIB:
2433                 return &ipoib_ps;
2434         case RDMA_PS_IB:
2435                 return &ib_ps;
2436         default:
2437                 return NULL;
2438         }
2439 }
2440
2441 static struct idr *cma_select_ib_ps(struct rdma_id_private *id_priv)
2442 {
2443         struct idr *ps = NULL;
2444         struct sockaddr_ib *sib;
2445         u64 sid_ps, mask, sid;
2446
2447         sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
2448         mask = be64_to_cpu(sib->sib_sid_mask) & RDMA_IB_IP_PS_MASK;
2449         sid = be64_to_cpu(sib->sib_sid) & mask;
2450
2451         if ((id_priv->id.ps == RDMA_PS_IB) && (sid == (RDMA_IB_IP_PS_IB & mask))) {
2452                 sid_ps = RDMA_IB_IP_PS_IB;
2453                 ps = &ib_ps;
2454         } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_TCP)) &&
2455                    (sid == (RDMA_IB_IP_PS_TCP & mask))) {
2456                 sid_ps = RDMA_IB_IP_PS_TCP;
2457                 ps = &tcp_ps;
2458         } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_UDP)) &&
2459                    (sid == (RDMA_IB_IP_PS_UDP & mask))) {
2460                 sid_ps = RDMA_IB_IP_PS_UDP;
2461                 ps = &udp_ps;
2462         }
2463
2464         if (ps) {
2465                 sib->sib_sid = cpu_to_be64(sid_ps | ntohs(cma_port((struct sockaddr *) sib)));
2466                 sib->sib_sid_mask = cpu_to_be64(RDMA_IB_IP_PS_MASK |
2467                                                 be64_to_cpu(sib->sib_sid_mask));
2468         }
2469         return ps;
2470 }
2471
2472 static int cma_get_port(struct rdma_id_private *id_priv)
2473 {
2474         struct idr *ps;
2475         int ret;
2476
2477         if (cma_family(id_priv) != AF_IB)
2478                 ps = cma_select_inet_ps(id_priv);
2479         else
2480                 ps = cma_select_ib_ps(id_priv);
2481         if (!ps)
2482                 return -EPROTONOSUPPORT;
2483
2484         mutex_lock(&lock);
2485         if (cma_any_port(cma_src_addr(id_priv)))
2486                 ret = cma_alloc_any_port(ps, id_priv);
2487         else
2488                 ret = cma_use_port(ps, id_priv);
2489         mutex_unlock(&lock);
2490
2491         return ret;
2492 }
2493
2494 static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
2495                                struct sockaddr *addr)
2496 {
2497 #if IS_ENABLED(CONFIG_IPV6)
2498         struct sockaddr_in6 *sin6;
2499
2500         if (addr->sa_family != AF_INET6)
2501                 return 0;
2502
2503         sin6 = (struct sockaddr_in6 *) addr;
2504
2505         if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL))
2506                 return 0;
2507
2508         if (!sin6->sin6_scope_id)
2509                         return -EINVAL;
2510
2511         dev_addr->bound_dev_if = sin6->sin6_scope_id;
2512 #endif
2513         return 0;
2514 }
2515
2516 int rdma_listen(struct rdma_cm_id *id, int backlog)
2517 {
2518         struct rdma_id_private *id_priv;
2519         int ret;
2520
2521         id_priv = container_of(id, struct rdma_id_private, id);
2522         if (id_priv->state == RDMA_CM_IDLE) {
2523                 id->route.addr.src_addr.ss_family = AF_INET;
2524                 ret = rdma_bind_addr(id, cma_src_addr(id_priv));
2525                 if (ret)
2526                         return ret;
2527         }
2528
2529         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN))
2530                 return -EINVAL;
2531
2532         if (id_priv->reuseaddr) {
2533                 ret = cma_bind_listen(id_priv);
2534                 if (ret)
2535                         goto err;
2536         }
2537
2538         id_priv->backlog = backlog;
2539         if (id->device) {
2540                 switch (rdma_node_get_transport(id->device->node_type)) {
2541                 case RDMA_TRANSPORT_IB:
2542                         ret = cma_ib_listen(id_priv);
2543                         if (ret)
2544                                 goto err;
2545                         break;
2546                 case RDMA_TRANSPORT_IWARP:
2547                         ret = cma_iw_listen(id_priv, backlog);
2548                         if (ret)
2549                                 goto err;
2550                         break;
2551                 default:
2552                         ret = -ENOSYS;
2553                         goto err;
2554                 }
2555         } else
2556                 cma_listen_on_all(id_priv);
2557
2558         return 0;
2559 err:
2560         id_priv->backlog = 0;
2561         cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND);
2562         return ret;
2563 }
2564 EXPORT_SYMBOL(rdma_listen);
2565
2566 int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
2567 {
2568         struct rdma_id_private *id_priv;
2569         int ret;
2570
2571         if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6 &&
2572             addr->sa_family != AF_IB)
2573                 return -EAFNOSUPPORT;
2574
2575         id_priv = container_of(id, struct rdma_id_private, id);
2576         if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND))
2577                 return -EINVAL;
2578
2579         ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
2580         if (ret)
2581                 goto err1;
2582
2583         memcpy(cma_src_addr(id_priv), addr, rdma_addr_size(addr));
2584         if (!cma_any_addr(addr)) {
2585                 ret = cma_translate_addr(addr, &id->route.addr.dev_addr);
2586                 if (ret)
2587                         goto err1;
2588
2589                 ret = cma_acquire_dev(id_priv, NULL);
2590                 if (ret)
2591                         goto err1;
2592         }
2593
2594         if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) {
2595                 if (addr->sa_family == AF_INET)
2596                         id_priv->afonly = 1;
2597 #if IS_ENABLED(CONFIG_IPV6)
2598                 else if (addr->sa_family == AF_INET6)
2599                         id_priv->afonly = init_net.ipv6.sysctl.bindv6only;
2600 #endif
2601         }
2602         ret = cma_get_port(id_priv);
2603         if (ret)
2604                 goto err2;
2605
2606         return 0;
2607 err2:
2608         if (id_priv->cma_dev)
2609                 cma_release_dev(id_priv);
2610 err1:
2611         cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE);
2612         return ret;
2613 }
2614 EXPORT_SYMBOL(rdma_bind_addr);
2615
2616 static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv)
2617 {
2618         struct cma_hdr *cma_hdr;
2619
2620         cma_hdr = hdr;
2621         cma_hdr->cma_version = CMA_VERSION;
2622         if (cma_family(id_priv) == AF_INET) {
2623                 struct sockaddr_in *src4, *dst4;
2624
2625                 src4 = (struct sockaddr_in *) cma_src_addr(id_priv);
2626                 dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv);
2627
2628                 cma_set_ip_ver(cma_hdr, 4);
2629                 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2630                 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2631                 cma_hdr->port = src4->sin_port;
2632         } else if (cma_family(id_priv) == AF_INET6) {
2633                 struct sockaddr_in6 *src6, *dst6;
2634
2635                 src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
2636                 dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv);
2637
2638                 cma_set_ip_ver(cma_hdr, 6);
2639                 cma_hdr->src_addr.ip6 = src6->sin6_addr;
2640                 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
2641                 cma_hdr->port = src6->sin6_port;
2642         }
2643         return 0;
2644 }
2645
2646 static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
2647                                 struct ib_cm_event *ib_event)
2648 {
2649         struct rdma_id_private *id_priv = cm_id->context;
2650         struct rdma_cm_event event;
2651         struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
2652         int ret = 0;
2653
2654         if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
2655                 return 0;
2656
2657         memset(&event, 0, sizeof event);
2658         switch (ib_event->event) {
2659         case IB_CM_SIDR_REQ_ERROR:
2660                 event.event = RDMA_CM_EVENT_UNREACHABLE;
2661                 event.status = -ETIMEDOUT;
2662                 break;
2663         case IB_CM_SIDR_REP_RECEIVED:
2664                 event.param.ud.private_data = ib_event->private_data;
2665                 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
2666                 if (rep->status != IB_SIDR_SUCCESS) {
2667                         event.event = RDMA_CM_EVENT_UNREACHABLE;
2668                         event.status = ib_event->param.sidr_rep_rcvd.status;
2669                         break;
2670                 }
2671                 ret = cma_set_qkey(id_priv, rep->qkey);
2672                 if (ret) {
2673                         event.event = RDMA_CM_EVENT_ADDR_ERROR;
2674                         event.status = ret;
2675                         break;
2676                 }
2677                 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
2678                                      id_priv->id.route.path_rec,
2679                                      &event.param.ud.ah_attr);
2680                 event.param.ud.qp_num = rep->qpn;
2681                 event.param.ud.qkey = rep->qkey;
2682                 event.event = RDMA_CM_EVENT_ESTABLISHED;
2683                 event.status = 0;
2684                 break;
2685         default:
2686                 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
2687                        ib_event->event);
2688                 goto out;
2689         }
2690
2691         ret = id_priv->id.event_handler(&id_priv->id, &event);
2692         if (ret) {
2693                 /* Destroy the CM ID by returning a non-zero value. */
2694                 id_priv->cm_id.ib = NULL;
2695                 cma_exch(id_priv, RDMA_CM_DESTROYING);
2696                 mutex_unlock(&id_priv->handler_mutex);
2697                 rdma_destroy_id(&id_priv->id);
2698                 return ret;
2699         }
2700 out:
2701         mutex_unlock(&id_priv->handler_mutex);
2702         return ret;
2703 }
2704
2705 static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
2706                               struct rdma_conn_param *conn_param)
2707 {
2708         struct ib_cm_sidr_req_param req;
2709         struct ib_cm_id *id;
2710         void *private_data;
2711         int offset, ret;
2712
2713         memset(&req, 0, sizeof req);
2714         offset = cma_user_data_offset(id_priv);
2715         req.private_data_len = offset + conn_param->private_data_len;
2716         if (req.private_data_len < conn_param->private_data_len)
2717                 return -EINVAL;
2718
2719         if (req.private_data_len) {
2720                 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2721                 if (!private_data)
2722                         return -ENOMEM;
2723         } else {
2724                 private_data = NULL;
2725         }
2726
2727         if (conn_param->private_data && conn_param->private_data_len)
2728                 memcpy(private_data + offset, conn_param->private_data,
2729                        conn_param->private_data_len);
2730
2731         if (private_data) {
2732                 ret = cma_format_hdr(private_data, id_priv);
2733                 if (ret)
2734                         goto out;
2735                 req.private_data = private_data;
2736         }
2737
2738         id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler,
2739                              id_priv);
2740         if (IS_ERR(id)) {
2741                 ret = PTR_ERR(id);
2742                 goto out;
2743         }
2744         id_priv->cm_id.ib = id;
2745
2746         req.path = id_priv->id.route.path_rec;
2747         req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
2748         req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
2749         req.max_cm_retries = CMA_MAX_CM_RETRIES;
2750
2751         ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
2752         if (ret) {
2753                 ib_destroy_cm_id(id_priv->cm_id.ib);
2754                 id_priv->cm_id.ib = NULL;
2755         }
2756 out:
2757         kfree(private_data);
2758         return ret;
2759 }
2760
2761 static int cma_connect_ib(struct rdma_id_private *id_priv,
2762                           struct rdma_conn_param *conn_param)
2763 {
2764         struct ib_cm_req_param req;
2765         struct rdma_route *route;
2766         void *private_data;
2767         struct ib_cm_id *id;
2768         int offset, ret;
2769
2770         memset(&req, 0, sizeof req);
2771         offset = cma_user_data_offset(id_priv);
2772         req.private_data_len = offset + conn_param->private_data_len;
2773         if (req.private_data_len < conn_param->private_data_len)
2774                 return -EINVAL;
2775
2776         if (req.private_data_len) {
2777                 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2778                 if (!private_data)
2779                         return -ENOMEM;
2780         } else {
2781                 private_data = NULL;
2782         }
2783
2784         if (conn_param->private_data && conn_param->private_data_len)
2785                 memcpy(private_data + offset, conn_param->private_data,
2786                        conn_param->private_data_len);
2787
2788         id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv);
2789         if (IS_ERR(id)) {
2790                 ret = PTR_ERR(id);
2791                 goto out;
2792         }
2793         id_priv->cm_id.ib = id;
2794
2795         route = &id_priv->id.route;
2796         if (private_data) {
2797                 ret = cma_format_hdr(private_data, id_priv);
2798                 if (ret)
2799                         goto out;
2800                 req.private_data = private_data;
2801         }
2802
2803         req.primary_path = &route->path_rec[0];
2804         if (route->num_paths == 2)
2805                 req.alternate_path = &route->path_rec[1];
2806
2807         req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
2808         req.qp_num = id_priv->qp_num;
2809         req.qp_type = id_priv->id.qp_type;
2810         req.starting_psn = id_priv->seq_num;
2811         req.responder_resources = conn_param->responder_resources;
2812         req.initiator_depth = conn_param->initiator_depth;
2813         req.flow_control = conn_param->flow_control;
2814         req.retry_count = min_t(u8, 7, conn_param->retry_count);
2815         req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
2816         req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2817         req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2818         req.max_cm_retries = CMA_MAX_CM_RETRIES;
2819         req.srq = id_priv->srq ? 1 : 0;
2820
2821         ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
2822 out:
2823         if (ret && !IS_ERR(id)) {
2824                 ib_destroy_cm_id(id);
2825                 id_priv->cm_id.ib = NULL;
2826         }
2827
2828         kfree(private_data);
2829         return ret;
2830 }
2831
2832 static int cma_connect_iw(struct rdma_id_private *id_priv,
2833                           struct rdma_conn_param *conn_param)
2834 {
2835         struct iw_cm_id *cm_id;
2836         int ret;
2837         struct iw_cm_conn_param iw_param;
2838
2839         cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
2840         if (IS_ERR(cm_id))
2841                 return PTR_ERR(cm_id);
2842
2843         id_priv->cm_id.iw = cm_id;
2844
2845         memcpy(&cm_id->local_addr, cma_src_addr(id_priv),
2846                rdma_addr_size(cma_src_addr(id_priv)));
2847         memcpy(&cm_id->remote_addr, cma_dst_addr(id_priv),
2848                rdma_addr_size(cma_dst_addr(id_priv)));
2849
2850         ret = cma_modify_qp_rtr(id_priv, conn_param);
2851         if (ret)
2852                 goto out;
2853
2854         if (conn_param) {
2855                 iw_param.ord = conn_param->initiator_depth;
2856                 iw_param.ird = conn_param->responder_resources;
2857                 iw_param.private_data = conn_param->private_data;
2858                 iw_param.private_data_len = conn_param->private_data_len;
2859                 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num;
2860         } else {
2861                 memset(&iw_param, 0, sizeof iw_param);
2862                 iw_param.qpn = id_priv->qp_num;
2863         }
2864         ret = iw_cm_connect(cm_id, &iw_param);
2865 out:
2866         if (ret) {
2867                 iw_destroy_cm_id(cm_id);
2868                 id_priv->cm_id.iw = NULL;
2869         }
2870         return ret;
2871 }
2872
2873 int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2874 {
2875         struct rdma_id_private *id_priv;
2876         int ret;
2877
2878         id_priv = container_of(id, struct rdma_id_private, id);
2879         if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT))
2880                 return -EINVAL;
2881
2882         if (!id->qp) {
2883                 id_priv->qp_num = conn_param->qp_num;
2884                 id_priv->srq = conn_param->srq;
2885         }
2886
2887         switch (rdma_node_get_transport(id->device->node_type)) {
2888         case RDMA_TRANSPORT_IB:
2889                 if (id->qp_type == IB_QPT_UD)
2890                         ret = cma_resolve_ib_udp(id_priv, conn_param);
2891                 else
2892                         ret = cma_connect_ib(id_priv, conn_param);
2893                 break;
2894         case RDMA_TRANSPORT_IWARP:
2895                 ret = cma_connect_iw(id_priv, conn_param);
2896                 break;
2897         default:
2898                 ret = -ENOSYS;
2899                 break;
2900         }
2901         if (ret)
2902                 goto err;
2903
2904         return 0;
2905 err:
2906         cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED);
2907         return ret;
2908 }
2909 EXPORT_SYMBOL(rdma_connect);
2910
2911 static int cma_accept_ib(struct rdma_id_private *id_priv,
2912                          struct rdma_conn_param *conn_param)
2913 {
2914         struct ib_cm_rep_param rep;
2915         int ret;
2916
2917         ret = cma_modify_qp_rtr(id_priv, conn_param);
2918         if (ret)
2919                 goto out;
2920
2921         ret = cma_modify_qp_rts(id_priv, conn_param);
2922         if (ret)
2923                 goto out;
2924
2925         memset(&rep, 0, sizeof rep);
2926         rep.qp_num = id_priv->qp_num;
2927         rep.starting_psn = id_priv->seq_num;
2928         rep.private_data = conn_param->private_data;
2929         rep.private_data_len = conn_param->private_data_len;
2930         rep.responder_resources = conn_param->responder_resources;
2931         rep.initiator_depth = conn_param->initiator_depth;
2932         rep.failover_accepted = 0;
2933         rep.flow_control = conn_param->flow_control;
2934         rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
2935         rep.srq = id_priv->srq ? 1 : 0;
2936
2937         ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
2938 out:
2939         return ret;
2940 }
2941
2942 static int cma_accept_iw(struct rdma_id_private *id_priv,
2943                   struct rdma_conn_param *conn_param)
2944 {
2945         struct iw_cm_conn_param iw_param;
2946         int ret;
2947
2948         ret = cma_modify_qp_rtr(id_priv, conn_param);
2949         if (ret)
2950                 return ret;
2951
2952         iw_param.ord = conn_param->initiator_depth;
2953         iw_param.ird = conn_param->responder_resources;
2954         iw_param.private_data = conn_param->private_data;
2955         iw_param.private_data_len = conn_param->private_data_len;
2956         if (id_priv->id.qp) {
2957                 iw_param.qpn = id_priv->qp_num;
2958         } else
2959                 iw_param.qpn = conn_param->qp_num;
2960
2961         return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
2962 }
2963
2964 static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
2965                              enum ib_cm_sidr_status status, u32 qkey,
2966                              const void *private_data, int private_data_len)
2967 {
2968         struct ib_cm_sidr_rep_param rep;
2969         int ret;
2970
2971         memset(&rep, 0, sizeof rep);
2972         rep.status = status;
2973         if (status == IB_SIDR_SUCCESS) {
2974                 ret = cma_set_qkey(id_priv, qkey);
2975                 if (ret)
2976                         return ret;
2977                 rep.qp_num = id_priv->qp_num;
2978                 rep.qkey = id_priv->qkey;
2979         }
2980         rep.private_data = private_data;
2981         rep.private_data_len = private_data_len;
2982
2983         return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
2984 }
2985
2986 int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2987 {
2988         struct rdma_id_private *id_priv;
2989         int ret;
2990
2991         id_priv = container_of(id, struct rdma_id_private, id);
2992
2993         id_priv->owner = task_pid_nr(current);
2994
2995         if (!cma_comp(id_priv, RDMA_CM_CONNECT))
2996                 return -EINVAL;
2997
2998         if (!id->qp && conn_param) {
2999                 id_priv->qp_num = conn_param->qp_num;
3000                 id_priv->srq = conn_param->srq;
3001         }
3002
3003         switch (rdma_node_get_transport(id->device->node_type)) {
3004         case RDMA_TRANSPORT_IB:
3005                 if (id->qp_type == IB_QPT_UD) {
3006                         if (conn_param)
3007                                 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
3008                                                         conn_param->qkey,
3009                                                         conn_param->private_data,
3010                                                         conn_param->private_data_len);
3011                         else
3012                                 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
3013                                                         0, NULL, 0);
3014                 } else {
3015                         if (conn_param)
3016                                 ret = cma_accept_ib(id_priv, conn_param);
3017                         else
3018                                 ret = cma_rep_recv(id_priv);
3019                 }
3020                 break;
3021         case RDMA_TRANSPORT_IWARP:
3022                 ret = cma_accept_iw(id_priv, conn_param);
3023                 break;
3024         default:
3025                 ret = -ENOSYS;
3026                 break;
3027         }
3028
3029         if (ret)
3030                 goto reject;
3031
3032         return 0;
3033 reject:
3034         cma_modify_qp_err(id_priv);
3035         rdma_reject(id, NULL, 0);
3036         return ret;
3037 }
3038 EXPORT_SYMBOL(rdma_accept);
3039
3040 int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
3041 {
3042         struct rdma_id_private *id_priv;
3043         int ret;
3044
3045         id_priv = container_of(id, struct rdma_id_private, id);
3046         if (!id_priv->cm_id.ib)
3047                 return -EINVAL;
3048
3049         switch (id->device->node_type) {
3050         case RDMA_NODE_IB_CA:
3051                 ret = ib_cm_notify(id_priv->cm_id.ib, event);
3052                 break;
3053         default:
3054                 ret = 0;
3055                 break;
3056         }
3057         return ret;
3058 }
3059 EXPORT_SYMBOL(rdma_notify);
3060
3061 int rdma_reject(struct rdma_cm_id *id, const void *private_data,
3062                 u8 private_data_len)
3063 {
3064         struct rdma_id_private *id_priv;
3065         int ret;
3066
3067         id_priv = container_of(id, struct rdma_id_private, id);
3068         if (!id_priv->cm_id.ib)
3069                 return -EINVAL;
3070
3071         switch (rdma_node_get_transport(id->device->node_type)) {
3072         case RDMA_TRANSPORT_IB:
3073                 if (id->qp_type == IB_QPT_UD)
3074                         ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0,
3075                                                 private_data, private_data_len);
3076                 else
3077                         ret = ib_send_cm_rej(id_priv->cm_id.ib,
3078                                              IB_CM_REJ_CONSUMER_DEFINED, NULL,
3079                                              0, private_data, private_data_len);
3080                 break;
3081         case RDMA_TRANSPORT_IWARP:
3082                 ret = iw_cm_reject(id_priv->cm_id.iw,
3083                                    private_data, private_data_len);
3084                 break;
3085         default:
3086                 ret = -ENOSYS;
3087                 break;
3088         }
3089         return ret;
3090 }
3091 EXPORT_SYMBOL(rdma_reject);
3092
3093 int rdma_disconnect(struct rdma_cm_id *id)
3094 {
3095         struct rdma_id_private *id_priv;
3096         int ret;
3097
3098         id_priv = container_of(id, struct rdma_id_private, id);
3099         if (!id_priv->cm_id.ib)
3100                 return -EINVAL;
3101
3102         switch (rdma_node_get_transport(id->device->node_type)) {
3103         case RDMA_TRANSPORT_IB:
3104                 ret = cma_modify_qp_err(id_priv);
3105                 if (ret)
3106                         goto out;
3107                 /* Initiate or respond to a disconnect. */
3108                 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
3109                         ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
3110                 break;
3111         case RDMA_TRANSPORT_IWARP:
3112                 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
3113                 break;
3114         default:
3115                 ret = -EINVAL;
3116                 break;
3117         }
3118 out:
3119         return ret;
3120 }
3121 EXPORT_SYMBOL(rdma_disconnect);
3122
3123 static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
3124 {
3125         struct rdma_id_private *id_priv;
3126         struct cma_multicast *mc = multicast->context;
3127         struct rdma_cm_event event;
3128         int ret;
3129
3130         id_priv = mc->id_priv;
3131         if (cma_disable_callback(id_priv, RDMA_CM_ADDR_BOUND) &&
3132             cma_disable_callback(id_priv, RDMA_CM_ADDR_RESOLVED))
3133                 return 0;
3134
3135         if (!status)
3136                 status = cma_set_qkey(id_priv, be32_to_cpu(multicast->rec.qkey));
3137         mutex_lock(&id_priv->qp_mutex);
3138         if (!status && id_priv->id.qp)
3139                 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
3140                                          be16_to_cpu(multicast->rec.mlid));
3141         mutex_unlock(&id_priv->qp_mutex);
3142
3143         memset(&event, 0, sizeof event);
3144         event.status = status;
3145         event.param.ud.private_data = mc->context;
3146         if (!status) {
3147                 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
3148                 ib_init_ah_from_mcmember(id_priv->id.device,
3149                                          id_priv->id.port_num, &multicast->rec,
3150                                          &event.param.ud.ah_attr);
3151                 event.param.ud.qp_num = 0xFFFFFF;
3152                 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
3153         } else
3154                 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
3155
3156         ret = id_priv->id.event_handler(&id_priv->id, &event);
3157         if (ret) {
3158                 cma_exch(id_priv, RDMA_CM_DESTROYING);
3159                 mutex_unlock(&id_priv->handler_mutex);
3160                 rdma_destroy_id(&id_priv->id);
3161                 return 0;
3162         }
3163
3164         mutex_unlock(&id_priv->handler_mutex);
3165         return 0;
3166 }
3167
3168 static void cma_set_mgid(struct rdma_id_private *id_priv,
3169                          struct sockaddr *addr, union ib_gid *mgid)
3170 {
3171         unsigned char mc_map[MAX_ADDR_LEN];
3172         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3173         struct sockaddr_in *sin = (struct sockaddr_in *) addr;
3174         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
3175
3176         if (cma_any_addr(addr)) {
3177                 memset(mgid, 0, sizeof *mgid);
3178         } else if ((addr->sa_family == AF_INET6) &&
3179                    ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
3180                                                                  0xFF10A01B)) {
3181                 /* IPv6 address is an SA assigned MGID. */
3182                 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3183         } else if (addr->sa_family == AF_IB) {
3184                 memcpy(mgid, &((struct sockaddr_ib *) addr)->sib_addr, sizeof *mgid);
3185         } else if ((addr->sa_family == AF_INET6)) {
3186                 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
3187                 if (id_priv->id.ps == RDMA_PS_UDP)
3188                         mc_map[7] = 0x01;       /* Use RDMA CM signature */
3189                 *mgid = *(union ib_gid *) (mc_map + 4);
3190         } else {
3191                 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
3192                 if (id_priv->id.ps == RDMA_PS_UDP)
3193                         mc_map[7] = 0x01;       /* Use RDMA CM signature */
3194                 *mgid = *(union ib_gid *) (mc_map + 4);
3195         }
3196 }
3197
3198 static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
3199                                  struct cma_multicast *mc)
3200 {
3201         struct ib_sa_mcmember_rec rec;
3202         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3203         ib_sa_comp_mask comp_mask;
3204         int ret;
3205
3206         ib_addr_get_mgid(dev_addr, &rec.mgid);
3207         ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
3208                                      &rec.mgid, &rec);
3209         if (ret)
3210                 return ret;
3211
3212         ret = cma_set_qkey(id_priv, 0);
3213         if (ret)
3214                 return ret;
3215
3216         cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
3217         rec.qkey = cpu_to_be32(id_priv->qkey);
3218         rdma_addr_get_sgid(dev_addr, &rec.port_gid);
3219         rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
3220         rec.join_state = 1;
3221
3222         comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
3223                     IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
3224                     IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
3225                     IB_SA_MCMEMBER_REC_FLOW_LABEL |
3226                     IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
3227
3228         if (id_priv->id.ps == RDMA_PS_IPOIB)
3229                 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
3230                              IB_SA_MCMEMBER_REC_RATE_SELECTOR |
3231                              IB_SA_MCMEMBER_REC_MTU_SELECTOR |
3232                              IB_SA_MCMEMBER_REC_MTU |
3233                              IB_SA_MCMEMBER_REC_HOP_LIMIT;
3234
3235         mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
3236                                                 id_priv->id.port_num, &rec,
3237                                                 comp_mask, GFP_KERNEL,
3238                                                 cma_ib_mc_handler, mc);
3239         return PTR_ERR_OR_ZERO(mc->multicast.ib);
3240 }
3241
3242 static void iboe_mcast_work_handler(struct work_struct *work)
3243 {
3244         struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
3245         struct cma_multicast *mc = mw->mc;
3246         struct ib_sa_multicast *m = mc->multicast.ib;
3247
3248         mc->multicast.ib->context = mc;
3249         cma_ib_mc_handler(0, m);
3250         kref_put(&mc->mcref, release_mc);
3251         kfree(mw);
3252 }
3253
3254 static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid)
3255 {
3256         struct sockaddr_in *sin = (struct sockaddr_in *)addr;
3257         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
3258
3259         if (cma_any_addr(addr)) {
3260                 memset(mgid, 0, sizeof *mgid);
3261         } else if (addr->sa_family == AF_INET6) {
3262                 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3263         } else {
3264                 mgid->raw[0] = 0xff;
3265                 mgid->raw[1] = 0x0e;
3266                 mgid->raw[2] = 0;
3267                 mgid->raw[3] = 0;
3268                 mgid->raw[4] = 0;
3269                 mgid->raw[5] = 0;
3270                 mgid->raw[6] = 0;
3271                 mgid->raw[7] = 0;
3272                 mgid->raw[8] = 0;
3273                 mgid->raw[9] = 0;
3274                 mgid->raw[10] = 0xff;
3275                 mgid->raw[11] = 0xff;
3276                 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
3277         }
3278 }
3279
3280 static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
3281                                    struct cma_multicast *mc)
3282 {
3283         struct iboe_mcast_work *work;
3284         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3285         int err;
3286         struct sockaddr *addr = (struct sockaddr *)&mc->addr;
3287         struct net_device *ndev = NULL;
3288
3289         if (cma_zero_addr((struct sockaddr *)&mc->addr))
3290                 return -EINVAL;
3291
3292         work = kzalloc(sizeof *work, GFP_KERNEL);
3293         if (!work)
3294                 return -ENOMEM;
3295
3296         mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
3297         if (!mc->multicast.ib) {
3298                 err = -ENOMEM;
3299                 goto out1;
3300         }
3301
3302         cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid);
3303
3304         mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
3305         if (id_priv->id.ps == RDMA_PS_UDP)
3306                 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
3307
3308         if (dev_addr->bound_dev_if)
3309                 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
3310         if (!ndev) {
3311                 err = -ENODEV;
3312                 goto out2;
3313         }
3314         mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
3315         mc->multicast.ib->rec.hop_limit = 1;
3316         mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu);
3317         dev_put(ndev);
3318         if (!mc->multicast.ib->rec.mtu) {
3319                 err = -EINVAL;
3320                 goto out2;
3321         }
3322         rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
3323                     &mc->multicast.ib->rec.port_gid);
3324         work->id = id_priv;
3325         work->mc = mc;
3326         INIT_WORK(&work->work, iboe_mcast_work_handler);
3327         kref_get(&mc->mcref);
3328         queue_work(cma_wq, &work->work);
3329
3330         return 0;
3331
3332 out2:
3333         kfree(mc->multicast.ib);
3334 out1:
3335         kfree(work);
3336         return err;
3337 }
3338
3339 int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
3340                         void *context)
3341 {
3342         struct rdma_id_private *id_priv;
3343         struct cma_multicast *mc;
3344         int ret;
3345
3346         id_priv = container_of(id, struct rdma_id_private, id);
3347         if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) &&
3348             !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED))
3349                 return -EINVAL;
3350
3351         mc = kmalloc(sizeof *mc, GFP_KERNEL);
3352         if (!mc)
3353                 return -ENOMEM;
3354
3355         memcpy(&mc->addr, addr, rdma_addr_size(addr));
3356         mc->context = context;
3357         mc->id_priv = id_priv;
3358
3359         spin_lock(&id_priv->lock);
3360         list_add(&mc->list, &id_priv->mc_list);
3361         spin_unlock(&id_priv->lock);
3362
3363         switch (rdma_node_get_transport(id->device->node_type)) {
3364         case RDMA_TRANSPORT_IB:
3365                 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
3366                 case IB_LINK_LAYER_INFINIBAND:
3367                         ret = cma_join_ib_multicast(id_priv, mc);
3368                         break;
3369                 case IB_LINK_LAYER_ETHERNET:
3370                         kref_init(&mc->mcref);
3371                         ret = cma_iboe_join_multicast(id_priv, mc);
3372                         break;
3373                 default:
3374                         ret = -EINVAL;
3375                 }
3376                 break;
3377         default:
3378                 ret = -ENOSYS;
3379                 break;
3380         }
3381
3382         if (ret) {
3383                 spin_lock_irq(&id_priv->lock);
3384                 list_del(&mc->list);
3385                 spin_unlock_irq(&id_priv->lock);
3386                 kfree(mc);
3387         }
3388         return ret;
3389 }
3390 EXPORT_SYMBOL(rdma_join_multicast);
3391
3392 void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
3393 {
3394         struct rdma_id_private *id_priv;
3395         struct cma_multicast *mc;
3396
3397         id_priv = container_of(id, struct rdma_id_private, id);
3398         spin_lock_irq(&id_priv->lock);
3399         list_for_each_entry(mc, &id_priv->mc_list, list) {
3400                 if (!memcmp(&mc->addr, addr, rdma_addr_size(addr))) {
3401                         list_del(&mc->list);
3402                         spin_unlock_irq(&id_priv->lock);
3403
3404                         if (id->qp)
3405                                 ib_detach_mcast(id->qp,
3406                                                 &mc->multicast.ib->rec.mgid,
3407                                                 be16_to_cpu(mc->multicast.ib->rec.mlid));
3408                         if (rdma_node_get_transport(id_priv->cma_dev->device->node_type) == RDMA_TRANSPORT_IB) {
3409                                 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
3410                                 case IB_LINK_LAYER_INFINIBAND:
3411                                         ib_sa_free_multicast(mc->multicast.ib);
3412                                         kfree(mc);
3413                                         break;
3414                                 case IB_LINK_LAYER_ETHERNET:
3415                                         kref_put(&mc->mcref, release_mc);
3416                                         break;
3417                                 default:
3418                                         break;
3419                                 }
3420                         }
3421                         return;
3422                 }
3423         }
3424         spin_unlock_irq(&id_priv->lock);
3425 }
3426 EXPORT_SYMBOL(rdma_leave_multicast);
3427
3428 static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
3429 {
3430         struct rdma_dev_addr *dev_addr;
3431         struct cma_ndev_work *work;
3432
3433         dev_addr = &id_priv->id.route.addr.dev_addr;
3434
3435         if ((dev_addr->bound_dev_if == ndev->ifindex) &&
3436             memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
3437                 printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n",
3438                        ndev->name, &id_priv->id);
3439                 work = kzalloc(sizeof *work, GFP_KERNEL);
3440                 if (!work)
3441                         return -ENOMEM;
3442
3443                 INIT_WORK(&work->work, cma_ndev_work_handler);
3444                 work->id = id_priv;
3445                 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
3446                 atomic_inc(&id_priv->refcount);
3447                 queue_work(cma_wq, &work->work);
3448         }
3449
3450         return 0;
3451 }
3452
3453 static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
3454                                void *ptr)
3455 {
3456         struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
3457         struct cma_device *cma_dev;
3458         struct rdma_id_private *id_priv;
3459         int ret = NOTIFY_DONE;
3460
3461         if (dev_net(ndev) != &init_net)
3462                 return NOTIFY_DONE;
3463
3464         if (event != NETDEV_BONDING_FAILOVER)
3465                 return NOTIFY_DONE;
3466
3467         if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING))
3468                 return NOTIFY_DONE;
3469
3470         mutex_lock(&lock);
3471         list_for_each_entry(cma_dev, &dev_list, list)
3472                 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3473                         ret = cma_netdev_change(ndev, id_priv);
3474                         if (ret)
3475                                 goto out;
3476                 }
3477
3478 out:
3479         mutex_unlock(&lock);
3480         return ret;
3481 }
3482
3483 static struct notifier_block cma_nb = {
3484         .notifier_call = cma_netdev_callback
3485 };
3486
3487 static void cma_add_one(struct ib_device *device)
3488 {
3489         struct cma_device *cma_dev;
3490         struct rdma_id_private *id_priv;
3491
3492         cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
3493         if (!cma_dev)
3494                 return;
3495
3496         cma_dev->device = device;
3497
3498         init_completion(&cma_dev->comp);
3499         atomic_set(&cma_dev->refcount, 1);
3500         INIT_LIST_HEAD(&cma_dev->id_list);
3501         ib_set_client_data(device, &cma_client, cma_dev);
3502
3503         mutex_lock(&lock);
3504         list_add_tail(&cma_dev->list, &dev_list);
3505         list_for_each_entry(id_priv, &listen_any_list, list)
3506                 cma_listen_on_dev(id_priv, cma_dev);
3507         mutex_unlock(&lock);
3508 }
3509
3510 static int cma_remove_id_dev(struct rdma_id_private *id_priv)
3511 {
3512         struct rdma_cm_event event;
3513         enum rdma_cm_state state;
3514         int ret = 0;
3515
3516         /* Record that we want to remove the device */
3517         state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL);
3518         if (state == RDMA_CM_DESTROYING)
3519                 return 0;
3520
3521         cma_cancel_operation(id_priv, state);
3522         mutex_lock(&id_priv->handler_mutex);
3523
3524         /* Check for destruction from another callback. */
3525         if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL))
3526                 goto out;
3527
3528         memset(&event, 0, sizeof event);
3529         event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
3530         ret = id_priv->id.event_handler(&id_priv->id, &event);
3531 out:
3532         mutex_unlock(&id_priv->handler_mutex);
3533         return ret;
3534 }
3535
3536 static void cma_process_remove(struct cma_device *cma_dev)
3537 {
3538         struct rdma_id_private *id_priv;
3539         int ret;
3540
3541         mutex_lock(&lock);
3542         while (!list_empty(&cma_dev->id_list)) {
3543                 id_priv = list_entry(cma_dev->id_list.next,
3544                                      struct rdma_id_private, list);
3545
3546                 list_del(&id_priv->listen_list);
3547                 list_del_init(&id_priv->list);
3548                 atomic_inc(&id_priv->refcount);
3549                 mutex_unlock(&lock);
3550
3551                 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
3552                 cma_deref_id(id_priv);
3553                 if (ret)
3554                         rdma_destroy_id(&id_priv->id);
3555
3556                 mutex_lock(&lock);
3557         }
3558         mutex_unlock(&lock);
3559
3560         cma_deref_dev(cma_dev);
3561         wait_for_completion(&cma_dev->comp);
3562 }
3563
3564 static void cma_remove_one(struct ib_device *device)
3565 {
3566         struct cma_device *cma_dev;
3567
3568         cma_dev = ib_get_client_data(device, &cma_client);
3569         if (!cma_dev)
3570                 return;
3571
3572         mutex_lock(&lock);
3573         list_del(&cma_dev->list);
3574         mutex_unlock(&lock);
3575
3576         cma_process_remove(cma_dev);
3577         kfree(cma_dev);
3578 }
3579
3580 static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb)
3581 {
3582         struct nlmsghdr *nlh;
3583         struct rdma_cm_id_stats *id_stats;
3584         struct rdma_id_private *id_priv;
3585         struct rdma_cm_id *id = NULL;
3586         struct cma_device *cma_dev;
3587         int i_dev = 0, i_id = 0;
3588
3589         /*
3590          * We export all of the IDs as a sequence of messages.  Each
3591          * ID gets its own netlink message.
3592          */
3593         mutex_lock(&lock);
3594
3595         list_for_each_entry(cma_dev, &dev_list, list) {
3596                 if (i_dev < cb->args[0]) {
3597                         i_dev++;
3598                         continue;
3599                 }
3600
3601                 i_id = 0;
3602                 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3603                         if (i_id < cb->args[1]) {
3604                                 i_id++;
3605                                 continue;
3606                         }
3607
3608                         id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq,
3609                                                 sizeof *id_stats, RDMA_NL_RDMA_CM,
3610                                                 RDMA_NL_RDMA_CM_ID_STATS,
3611                                                 NLM_F_MULTI);
3612                         if (!id_stats)
3613                                 goto out;
3614
3615                         memset(id_stats, 0, sizeof *id_stats);
3616                         id = &id_priv->id;
3617                         id_stats->node_type = id->route.addr.dev_addr.dev_type;
3618                         id_stats->port_num = id->port_num;
3619                         id_stats->bound_dev_if =
3620                                 id->route.addr.dev_addr.bound_dev_if;
3621
3622                         if (ibnl_put_attr(skb, nlh,
3623                                           rdma_addr_size(cma_src_addr(id_priv)),
3624                                           cma_src_addr(id_priv),
3625                                           RDMA_NL_RDMA_CM_ATTR_SRC_ADDR))
3626                                 goto out;
3627                         if (ibnl_put_attr(skb, nlh,
3628                                           rdma_addr_size(cma_src_addr(id_priv)),
3629                                           cma_dst_addr(id_priv),
3630                                           RDMA_NL_RDMA_CM_ATTR_DST_ADDR))
3631                                 goto out;
3632
3633                         id_stats->pid           = id_priv->owner;
3634                         id_stats->port_space    = id->ps;
3635                         id_stats->cm_state      = id_priv->state;
3636                         id_stats->qp_num        = id_priv->qp_num;
3637                         id_stats->qp_type       = id->qp_type;
3638
3639                         i_id++;
3640                 }
3641
3642                 cb->args[1] = 0;
3643                 i_dev++;
3644         }
3645
3646 out:
3647         mutex_unlock(&lock);
3648         cb->args[0] = i_dev;
3649         cb->args[1] = i_id;
3650
3651         return skb->len;
3652 }
3653
3654 static const struct ibnl_client_cbs cma_cb_table[] = {
3655         [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats,
3656                                        .module = THIS_MODULE },
3657 };
3658
3659 static int __init cma_init(void)
3660 {
3661         int ret;
3662
3663         cma_wq = create_singlethread_workqueue("rdma_cm");
3664         if (!cma_wq)
3665                 return -ENOMEM;
3666
3667         ib_sa_register_client(&sa_client);
3668         rdma_addr_register_client(&addr_client);
3669         register_netdevice_notifier(&cma_nb);
3670
3671         ret = ib_register_client(&cma_client);
3672         if (ret)
3673                 goto err;
3674
3675         if (ibnl_add_client(RDMA_NL_RDMA_CM, RDMA_NL_RDMA_CM_NUM_OPS, cma_cb_table))
3676                 printk(KERN_WARNING "RDMA CMA: failed to add netlink callback\n");
3677
3678         return 0;
3679
3680 err:
3681         unregister_netdevice_notifier(&cma_nb);
3682         rdma_addr_unregister_client(&addr_client);
3683         ib_sa_unregister_client(&sa_client);
3684         destroy_workqueue(cma_wq);
3685         return ret;
3686 }
3687
3688 static void __exit cma_cleanup(void)
3689 {
3690         ibnl_remove_client(RDMA_NL_RDMA_CM);
3691         ib_unregister_client(&cma_client);
3692         unregister_netdevice_notifier(&cma_nb);
3693         rdma_addr_unregister_client(&addr_client);
3694         ib_sa_unregister_client(&sa_client);
3695         destroy_workqueue(cma_wq);
3696         idr_destroy(&tcp_ps);
3697         idr_destroy(&udp_ps);
3698         idr_destroy(&ipoib_ps);
3699         idr_destroy(&ib_ps);
3700 }
3701
3702 module_init(cma_init);
3703 module_exit(cma_cleanup);