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_cache.h>
  54 #include <rdma/ib_cm.h>
  55 #include <rdma/ib_sa.h>
  56 #include <rdma/iw_cm.h>
  57
  58 MODULE_AUTHOR("Sean Hefty");
  59 MODULE_DESCRIPTION("Generic RDMA CM Agent");
  60 MODULE_LICENSE("Dual BSD/GPL");
  61
  62 #define CMA_CM_RESPONSE_TIMEOUT 20
  63 #define CMA_MAX_CM_RETRIES 15
  64 #define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
  65 #define CMA_IBOE_PACKET_LIFETIME 18
  66
  67 static void cma_add_one(struct ib_device *device);
  68 static void cma_remove_one(struct ib_device *device);
  69
  70 static struct ib_client cma_client = {
  71         .name   = "cma",
  72         .add    = cma_add_one,
  73         .remove = cma_remove_one
  74 };
  75
  76 static struct ib_sa_client sa_client;
  77 static struct rdma_addr_client addr_client;
  78 static LIST_HEAD(dev_list);
  79 static LIST_HEAD(listen_any_list);
  80 static DEFINE_MUTEX(lock);
  81 static struct workqueue_struct *cma_wq;
  82 static DEFINE_IDR(sdp_ps);
  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 struct sdp_hh {
 199         u8 bsdh[16];
 200         u8 sdp_version; /* Major version: 7:4 */
 201         u8 ip_version;  /* IP version: 7:4 */
 202         u8 sdp_specific1[10];
 203         __be16 port;
 204         __be16 sdp_specific2;
 205         union cma_ip_addr src_addr;
 206         union cma_ip_addr dst_addr;
 207 };
 208
 209 struct sdp_hah {
 210         u8 bsdh[16];
 211         u8 sdp_version;
 212 };
 213
 214 #define CMA_VERSION 0x00
 215 #define SDP_MAJ_VERSION 0x2
 216
 217 static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp)
 218 {
 219         unsigned long flags;
 220         int ret;
 221
 222         spin_lock_irqsave(&id_priv->lock, flags);
 223         ret = (id_priv->state == comp);
 224         spin_unlock_irqrestore(&id_priv->lock, flags);
 225         return ret;
 226 }
 227
 228 static int cma_comp_exch(struct rdma_id_private *id_priv,
 229                          enum rdma_cm_state comp, enum rdma_cm_state exch)
 230 {
 231         unsigned long flags;
 232         int ret;
 233
 234         spin_lock_irqsave(&id_priv->lock, flags);
 235         if ((ret = (id_priv->state == comp)))
 236                 id_priv->state = exch;
 237         spin_unlock_irqrestore(&id_priv->lock, flags);
 238         return ret;
 239 }
 240
 241 static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv,
 242                                    enum rdma_cm_state exch)
 243 {
 244         unsigned long flags;
 245         enum rdma_cm_state old;
 246
 247         spin_lock_irqsave(&id_priv->lock, flags);
 248         old = id_priv->state;
 249         id_priv->state = exch;
 250         spin_unlock_irqrestore(&id_priv->lock, flags);
 251         return old;
 252 }
 253
 254 static inline u8 cma_get_ip_ver(struct cma_hdr *hdr)
 255 {
 256         return hdr->ip_version >> 4;
 257 }
 258
 259 static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
 260 {
 261         hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
 262 }
 263
 264 static inline u8 sdp_get_majv(u8 sdp_version)
 265 {
 266         return sdp_version >> 4;
 267 }
 268
 269 static inline u8 sdp_get_ip_ver(struct sdp_hh *hh)
 270 {
 271         return hh->ip_version >> 4;
 272 }
 273
 274 static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver)
 275 {
 276         hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF);
 277 }
 278
 279 static void cma_attach_to_dev(struct rdma_id_private *id_priv,
 280                               struct cma_device *cma_dev)
 281 {
 282         atomic_inc(&cma_dev->refcount);
 283         id_priv->cma_dev = cma_dev;
 284         id_priv->id.device = cma_dev->device;
 285         id_priv->id.route.addr.dev_addr.transport =
 286                 rdma_node_get_transport(cma_dev->device->node_type);
 287         list_add_tail(&id_priv->list, &cma_dev->id_list);
 288 }
 289
 290 static inline void cma_deref_dev(struct cma_device *cma_dev)
 291 {
 292         if (atomic_dec_and_test(&cma_dev->refcount))
 293                 complete(&cma_dev->comp);
 294 }
 295
 296 static inline void release_mc(struct kref *kref)
 297 {
 298         struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);
 299
 300         kfree(mc->multicast.ib);
 301         kfree(mc);
 302 }
 303
 304 static void cma_release_dev(struct rdma_id_private *id_priv)
 305 {
 306         mutex_lock(&lock);
 307         list_del(&id_priv->list);
 308         cma_deref_dev(id_priv->cma_dev);
 309         id_priv->cma_dev = NULL;
 310         mutex_unlock(&lock);
 311 }
 312
 313 static int cma_set_qkey(struct rdma_id_private *id_priv)
 314 {
 315         struct ib_sa_mcmember_rec rec;
 316         int ret = 0;
 317
 318         if (id_priv->qkey)
 319                 return 0;
 320
 321         switch (id_priv->id.ps) {
 322         case RDMA_PS_UDP:
 323                 id_priv->qkey = RDMA_UDP_QKEY;
 324                 break;
 325         case RDMA_PS_IPOIB:
 326                 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
 327                 ret = ib_sa_get_mcmember_rec(id_priv->id.device,
 328                                              id_priv->id.port_num, &rec.mgid,
 329                                              &rec);
 330                 if (!ret)
 331                         id_priv->qkey = be32_to_cpu(rec.qkey);
 332                 break;
 333         default:
 334                 break;
 335         }
 336         return ret;
 337 }
 338
 339 static int find_gid_port(struct ib_device *device, union ib_gid *gid, u8 port_num)
 340 {
 341         int i;
 342         int err;
 343         struct ib_port_attr props;
 344         union ib_gid tmp;
 345
 346         err = ib_query_port(device, port_num, &props);
 347         if (err)
 348                 return err;
 349
 350         for (i = 0; i < props.gid_tbl_len; ++i) {
 351                 err = ib_query_gid(device, port_num, i, &tmp);
 352                 if (err)
 353                         return err;
 354                 if (!memcmp(&tmp, gid, sizeof tmp))
 355                         return 0;
 356         }
 357
 358         return -EADDRNOTAVAIL;
 359 }
 360
 361 static int cma_acquire_dev(struct rdma_id_private *id_priv)
 362 {
 363         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
 364         struct cma_device *cma_dev;
 365         union ib_gid gid, iboe_gid;
 366         int ret = -ENODEV;
 367         u8 port;
 368         enum rdma_link_layer dev_ll = dev_addr->dev_type == ARPHRD_INFINIBAND ?
 369                 IB_LINK_LAYER_INFINIBAND : IB_LINK_LAYER_ETHERNET;
 370
 371         if (dev_ll != IB_LINK_LAYER_INFINIBAND &&
 372             id_priv->id.ps == RDMA_PS_IPOIB)
 373                 return -EINVAL;
 374
 375         mutex_lock(&lock);
 376         iboe_addr_get_sgid(dev_addr, &iboe_gid);
 377         memcpy(&gid, dev_addr->src_dev_addr +
 378                rdma_addr_gid_offset(dev_addr), sizeof gid);
 379         list_for_each_entry(cma_dev, &dev_list, list) {
 380                 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
 381                         if (rdma_port_get_link_layer(cma_dev->device, port) == dev_ll) {
 382                                 if (rdma_node_get_transport(cma_dev->device->node_type) == RDMA_TRANSPORT_IB &&
 383                                     rdma_port_get_link_layer(cma_dev->device, port) == IB_LINK_LAYER_ETHERNET)
 384                                         ret = find_gid_port(cma_dev->device, &iboe_gid, port);
 385                                 else
 386                                         ret = find_gid_port(cma_dev->device, &gid, port);
 387
 388                                 if (!ret) {
 389                                         id_priv->id.port_num = port;
 390                                         goto out;
 391                                 }
 392                         }
 393                 }
 394         }
 395
 396 out:
 397         if (!ret)
 398                 cma_attach_to_dev(id_priv, cma_dev);
 399
 400         mutex_unlock(&lock);
 401         return ret;
 402 }
 403
 404 static void cma_deref_id(struct rdma_id_private *id_priv)
 405 {
 406         if (atomic_dec_and_test(&id_priv->refcount))
 407                 complete(&id_priv->comp);
 408 }
 409
 410 static int cma_disable_callback(struct rdma_id_private *id_priv,
 411                                 enum rdma_cm_state state)
 412 {
 413         mutex_lock(&id_priv->handler_mutex);
 414         if (id_priv->state != state) {
 415                 mutex_unlock(&id_priv->handler_mutex);
 416                 return -EINVAL;
 417         }
 418         return 0;
 419 }
 420
 421 struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
 422                                   void *context, enum rdma_port_space ps,
 423                                   enum ib_qp_type qp_type)
 424 {
 425         struct rdma_id_private *id_priv;
 426
 427         id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
 428         if (!id_priv)
 429                 return ERR_PTR(-ENOMEM);
 430
 431         id_priv->owner = task_pid_nr(current);
 432         id_priv->state = RDMA_CM_IDLE;
 433         id_priv->id.context = context;
 434         id_priv->id.event_handler = event_handler;
 435         id_priv->id.ps = ps;
 436         id_priv->id.qp_type = qp_type;
 437         spin_lock_init(&id_priv->lock);
 438         mutex_init(&id_priv->qp_mutex);
 439         init_completion(&id_priv->comp);
 440         atomic_set(&id_priv->refcount, 1);
 441         mutex_init(&id_priv->handler_mutex);
 442         INIT_LIST_HEAD(&id_priv->listen_list);
 443         INIT_LIST_HEAD(&id_priv->mc_list);
 444         get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
 445
 446         return &id_priv->id;
 447 }
 448 EXPORT_SYMBOL(rdma_create_id);
 449
 450 static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
 451 {
 452         struct ib_qp_attr qp_attr;
 453         int qp_attr_mask, ret;
 454
 455         qp_attr.qp_state = IB_QPS_INIT;
 456         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 457         if (ret)
 458                 return ret;
 459
 460         ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
 461         if (ret)
 462                 return ret;
 463
 464         qp_attr.qp_state = IB_QPS_RTR;
 465         ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
 466         if (ret)
 467                 return ret;
 468
 469         qp_attr.qp_state = IB_QPS_RTS;
 470         qp_attr.sq_psn = 0;
 471         ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
 472
 473         return ret;
 474 }
 475
 476 static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
 477 {
 478         struct ib_qp_attr qp_attr;
 479         int qp_attr_mask, ret;
 480
 481         qp_attr.qp_state = IB_QPS_INIT;
 482         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 483         if (ret)
 484                 return ret;
 485
 486         return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
 487 }
 488
 489 int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
 490                    struct ib_qp_init_attr *qp_init_attr)
 491 {
 492         struct rdma_id_private *id_priv;
 493         struct ib_qp *qp;
 494         int ret;
 495
 496         id_priv = container_of(id, struct rdma_id_private, id);
 497         if (id->device != pd->device)
 498                 return -EINVAL;
 499
 500         qp = ib_create_qp(pd, qp_init_attr);
 501         if (IS_ERR(qp))
 502                 return PTR_ERR(qp);
 503
 504         if (id->qp_type == IB_QPT_UD)
 505                 ret = cma_init_ud_qp(id_priv, qp);
 506         else
 507                 ret = cma_init_conn_qp(id_priv, qp);
 508         if (ret)
 509                 goto err;
 510
 511         id->qp = qp;
 512         id_priv->qp_num = qp->qp_num;
 513         id_priv->srq = (qp->srq != NULL);
 514         return 0;
 515 err:
 516         ib_destroy_qp(qp);
 517         return ret;
 518 }
 519 EXPORT_SYMBOL(rdma_create_qp);
 520
 521 void rdma_destroy_qp(struct rdma_cm_id *id)
 522 {
 523         struct rdma_id_private *id_priv;
 524
 525         id_priv = container_of(id, struct rdma_id_private, id);
 526         mutex_lock(&id_priv->qp_mutex);
 527         ib_destroy_qp(id_priv->id.qp);
 528         id_priv->id.qp = NULL;
 529         mutex_unlock(&id_priv->qp_mutex);
 530 }
 531 EXPORT_SYMBOL(rdma_destroy_qp);
 532
 533 static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
 534                              struct rdma_conn_param *conn_param)
 535 {
 536         struct ib_qp_attr qp_attr;
 537         int qp_attr_mask, ret;
 538
 539         mutex_lock(&id_priv->qp_mutex);
 540         if (!id_priv->id.qp) {
 541                 ret = 0;
 542                 goto out;
 543         }
 544
 545         /* Need to update QP attributes from default values. */
 546         qp_attr.qp_state = IB_QPS_INIT;
 547         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 548         if (ret)
 549                 goto out;
 550
 551         ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
 552         if (ret)
 553                 goto out;
 554
 555         qp_attr.qp_state = IB_QPS_RTR;
 556         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 557         if (ret)
 558                 goto out;
 559
 560         if (conn_param)
 561                 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
 562         ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
 563 out:
 564         mutex_unlock(&id_priv->qp_mutex);
 565         return ret;
 566 }
 567
 568 static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
 569                              struct rdma_conn_param *conn_param)
 570 {
 571         struct ib_qp_attr qp_attr;
 572         int qp_attr_mask, ret;
 573
 574         mutex_lock(&id_priv->qp_mutex);
 575         if (!id_priv->id.qp) {
 576                 ret = 0;
 577                 goto out;
 578         }
 579
 580         qp_attr.qp_state = IB_QPS_RTS;
 581         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 582         if (ret)
 583                 goto out;
 584
 585         if (conn_param)
 586                 qp_attr.max_rd_atomic = conn_param->initiator_depth;
 587         ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
 588 out:
 589         mutex_unlock(&id_priv->qp_mutex);
 590         return ret;
 591 }
 592
 593 static int cma_modify_qp_err(struct rdma_id_private *id_priv)
 594 {
 595         struct ib_qp_attr qp_attr;
 596         int ret;
 597
 598         mutex_lock(&id_priv->qp_mutex);
 599         if (!id_priv->id.qp) {
 600                 ret = 0;
 601                 goto out;
 602         }
 603
 604         qp_attr.qp_state = IB_QPS_ERR;
 605         ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
 606 out:
 607         mutex_unlock(&id_priv->qp_mutex);
 608         return ret;
 609 }
 610
 611 static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
 612                                struct ib_qp_attr *qp_attr, int *qp_attr_mask)
 613 {
 614         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
 615         int ret;
 616         u16 pkey;
 617
 618         if (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num) ==
 619             IB_LINK_LAYER_INFINIBAND)
 620                 pkey = ib_addr_get_pkey(dev_addr);
 621         else
 622                 pkey = 0xffff;
 623
 624         ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
 625                                   pkey, &qp_attr->pkey_index);
 626         if (ret)
 627                 return ret;
 628
 629         qp_attr->port_num = id_priv->id.port_num;
 630         *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
 631
 632         if (id_priv->id.qp_type == IB_QPT_UD) {
 633                 ret = cma_set_qkey(id_priv);
 634                 if (ret)
 635                         return ret;
 636
 637                 qp_attr->qkey = id_priv->qkey;
 638                 *qp_attr_mask |= IB_QP_QKEY;
 639         } else {
 640                 qp_attr->qp_access_flags = 0;
 641                 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
 642         }
 643         return 0;
 644 }
 645
 646 int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
 647                        int *qp_attr_mask)
 648 {
 649         struct rdma_id_private *id_priv;
 650         int ret = 0;
 651
 652         id_priv = container_of(id, struct rdma_id_private, id);
 653         switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
 654         case RDMA_TRANSPORT_IB:
 655                 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD))
 656                         ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
 657                 else
 658                         ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
 659                                                  qp_attr_mask);
 660                 if (qp_attr->qp_state == IB_QPS_RTR)
 661                         qp_attr->rq_psn = id_priv->seq_num;
 662                 break;
 663         case RDMA_TRANSPORT_IWARP:
 664                 if (!id_priv->cm_id.iw) {
 665                         qp_attr->qp_access_flags = 0;
 666                         *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
 667                 } else
 668                         ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
 669                                                  qp_attr_mask);
 670                 break;
 671         default:
 672                 ret = -ENOSYS;
 673                 break;
 674         }
 675
 676         return ret;
 677 }
 678 EXPORT_SYMBOL(rdma_init_qp_attr);
 679
 680 static inline int cma_zero_addr(struct sockaddr *addr)
 681 {
 682         struct in6_addr *ip6;
 683
 684         if (addr->sa_family == AF_INET)
 685                 return ipv4_is_zeronet(
 686                         ((struct sockaddr_in *)addr)->sin_addr.s_addr);
 687         else {
 688                 ip6 = &((struct sockaddr_in6 *) addr)->sin6_addr;
 689                 return (ip6->s6_addr32[0] | ip6->s6_addr32[1] |
 690                         ip6->s6_addr32[2] | ip6->s6_addr32[3]) == 0;
 691         }
 692 }
 693
 694 static inline int cma_loopback_addr(struct sockaddr *addr)
 695 {
 696         if (addr->sa_family == AF_INET)
 697                 return ipv4_is_loopback(
 698                         ((struct sockaddr_in *) addr)->sin_addr.s_addr);
 699         else
 700                 return ipv6_addr_loopback(
 701                         &((struct sockaddr_in6 *) addr)->sin6_addr);
 702 }
 703
 704 static inline int cma_any_addr(struct sockaddr *addr)
 705 {
 706         return cma_zero_addr(addr) || cma_loopback_addr(addr);
 707 }
 708
 709 static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst)
 710 {
 711         if (src->sa_family != dst->sa_family)
 712                 return -1;
 713
 714         switch (src->sa_family) {
 715         case AF_INET:
 716                 return ((struct sockaddr_in *) src)->sin_addr.s_addr !=
 717                        ((struct sockaddr_in *) dst)->sin_addr.s_addr;
 718         default:
 719                 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr,
 720                                      &((struct sockaddr_in6 *) dst)->sin6_addr);
 721         }
 722 }
 723
 724 static inline __be16 cma_port(struct sockaddr *addr)
 725 {
 726         if (addr->sa_family == AF_INET)
 727                 return ((struct sockaddr_in *) addr)->sin_port;
 728         else
 729                 return ((struct sockaddr_in6 *) addr)->sin6_port;
 730 }
 731
 732 static inline int cma_any_port(struct sockaddr *addr)
 733 {
 734         return !cma_port(addr);
 735 }
 736
 737 static int cma_get_net_info(void *hdr, enum rdma_port_space ps,
 738                             u8 *ip_ver, __be16 *port,
 739                             union cma_ip_addr **src, union cma_ip_addr **dst)
 740 {
 741         switch (ps) {
 742         case RDMA_PS_SDP:
 743                 if (sdp_get_majv(((struct sdp_hh *) hdr)->sdp_version) !=
 744                     SDP_MAJ_VERSION)
 745                         return -EINVAL;
 746
 747                 *ip_ver = sdp_get_ip_ver(hdr);
 748                 *port   = ((struct sdp_hh *) hdr)->port;
 749                 *src    = &((struct sdp_hh *) hdr)->src_addr;
 750                 *dst    = &((struct sdp_hh *) hdr)->dst_addr;
 751                 break;
 752         default:
 753                 if (((struct cma_hdr *) hdr)->cma_version != CMA_VERSION)
 754                         return -EINVAL;
 755
 756                 *ip_ver = cma_get_ip_ver(hdr);
 757                 *port   = ((struct cma_hdr *) hdr)->port;
 758                 *src    = &((struct cma_hdr *) hdr)->src_addr;
 759                 *dst    = &((struct cma_hdr *) hdr)->dst_addr;
 760                 break;
 761         }
 762
 763         if (*ip_ver != 4 && *ip_ver != 6)
 764                 return -EINVAL;
 765         return 0;
 766 }
 767
 768 static void cma_save_net_info(struct rdma_addr *addr,
 769                               struct rdma_addr *listen_addr,
 770                               u8 ip_ver, __be16 port,
 771                               union cma_ip_addr *src, union cma_ip_addr *dst)
 772 {
 773         struct sockaddr_in *listen4, *ip4;
 774         struct sockaddr_in6 *listen6, *ip6;
 775
 776         switch (ip_ver) {
 777         case 4:
 778                 listen4 = (struct sockaddr_in *) &listen_addr->src_addr;
 779                 ip4 = (struct sockaddr_in *) &addr->src_addr;
 780                 ip4->sin_family = listen4->sin_family;
 781                 ip4->sin_addr.s_addr = dst->ip4.addr;
 782                 ip4->sin_port = listen4->sin_port;
 783
 784                 ip4 = (struct sockaddr_in *) &addr->dst_addr;
 785                 ip4->sin_family = listen4->sin_family;
 786                 ip4->sin_addr.s_addr = src->ip4.addr;
 787                 ip4->sin_port = port;
 788                 break;
 789         case 6:
 790                 listen6 = (struct sockaddr_in6 *) &listen_addr->src_addr;
 791                 ip6 = (struct sockaddr_in6 *) &addr->src_addr;
 792                 ip6->sin6_family = listen6->sin6_family;
 793                 ip6->sin6_addr = dst->ip6;
 794                 ip6->sin6_port = listen6->sin6_port;
 795
 796                 ip6 = (struct sockaddr_in6 *) &addr->dst_addr;
 797                 ip6->sin6_family = listen6->sin6_family;
 798                 ip6->sin6_addr = src->ip6;
 799                 ip6->sin6_port = port;
 800                 break;
 801         default:
 802                 break;
 803         }
 804 }
 805
 806 static inline int cma_user_data_offset(enum rdma_port_space ps)
 807 {
 808         switch (ps) {
 809         case RDMA_PS_SDP:
 810                 return 0;
 811         default:
 812                 return sizeof(struct cma_hdr);
 813         }
 814 }
 815
 816 static void cma_cancel_route(struct rdma_id_private *id_priv)
 817 {
 818         switch (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num)) {
 819         case IB_LINK_LAYER_INFINIBAND:
 820                 if (id_priv->query)
 821                         ib_sa_cancel_query(id_priv->query_id, id_priv->query);
 822                 break;
 823         default:
 824                 break;
 825         }
 826 }
 827
 828 static void cma_cancel_listens(struct rdma_id_private *id_priv)
 829 {
 830         struct rdma_id_private *dev_id_priv;
 831
 832         /*
 833          * Remove from listen_any_list to prevent added devices from spawning
 834          * additional listen requests.
 835          */
 836         mutex_lock(&lock);
 837         list_del(&id_priv->list);
 838
 839         while (!list_empty(&id_priv->listen_list)) {
 840                 dev_id_priv = list_entry(id_priv->listen_list.next,
 841                                          struct rdma_id_private, listen_list);
 842                 /* sync with device removal to avoid duplicate destruction */
 843                 list_del_init(&dev_id_priv->list);
 844                 list_del(&dev_id_priv->listen_list);
 845                 mutex_unlock(&lock);
 846
 847                 rdma_destroy_id(&dev_id_priv->id);
 848                 mutex_lock(&lock);
 849         }
 850         mutex_unlock(&lock);
 851 }
 852
 853 static void cma_cancel_operation(struct rdma_id_private *id_priv,
 854                                  enum rdma_cm_state state)
 855 {
 856         switch (state) {
 857         case RDMA_CM_ADDR_QUERY:
 858                 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
 859                 break;
 860         case RDMA_CM_ROUTE_QUERY:
 861                 cma_cancel_route(id_priv);
 862                 break;
 863         case RDMA_CM_LISTEN:
 864                 if (cma_any_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr)
 865                                 && !id_priv->cma_dev)
 866                         cma_cancel_listens(id_priv);
 867                 break;
 868         default:
 869                 break;
 870         }
 871 }
 872
 873 static void cma_release_port(struct rdma_id_private *id_priv)
 874 {
 875         struct rdma_bind_list *bind_list = id_priv->bind_list;
 876
 877         if (!bind_list)
 878                 return;
 879
 880         mutex_lock(&lock);
 881         hlist_del(&id_priv->node);
 882         if (hlist_empty(&bind_list->owners)) {
 883                 idr_remove(bind_list->ps, bind_list->port);
 884                 kfree(bind_list);
 885         }
 886         mutex_unlock(&lock);
 887 }
 888
 889 static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
 890 {
 891         struct cma_multicast *mc;
 892
 893         while (!list_empty(&id_priv->mc_list)) {
 894                 mc = container_of(id_priv->mc_list.next,
 895                                   struct cma_multicast, list);
 896                 list_del(&mc->list);
 897                 switch (rdma_port_get_link_layer(id_priv->cma_dev->device, id_priv->id.port_num)) {
 898                 case IB_LINK_LAYER_INFINIBAND:
 899                         ib_sa_free_multicast(mc->multicast.ib);
 900                         kfree(mc);
 901                         break;
 902                 case IB_LINK_LAYER_ETHERNET:
 903                         kref_put(&mc->mcref, release_mc);
 904                         break;
 905                 default:
 906                         break;
 907                 }
 908         }
 909 }
 910
 911 void rdma_destroy_id(struct rdma_cm_id *id)
 912 {
 913         struct rdma_id_private *id_priv;
 914         enum rdma_cm_state state;
 915
 916         id_priv = container_of(id, struct rdma_id_private, id);
 917         state = cma_exch(id_priv, RDMA_CM_DESTROYING);
 918         cma_cancel_operation(id_priv, state);
 919
 920         /*
 921          * Wait for any active callback to finish.  New callbacks will find
 922          * the id_priv state set to destroying and abort.
 923          */
 924         mutex_lock(&id_priv->handler_mutex);
 925         mutex_unlock(&id_priv->handler_mutex);
 926
 927         if (id_priv->cma_dev) {
 928                 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
 929                 case RDMA_TRANSPORT_IB:
 930                         if (id_priv->cm_id.ib)
 931                                 ib_destroy_cm_id(id_priv->cm_id.ib);
 932                         break;
 933                 case RDMA_TRANSPORT_IWARP:
 934                         if (id_priv->cm_id.iw)
 935                                 iw_destroy_cm_id(id_priv->cm_id.iw);
 936                         break;
 937                 default:
 938                         break;
 939                 }
 940                 cma_leave_mc_groups(id_priv);
 941                 cma_release_dev(id_priv);
 942         }
 943
 944         cma_release_port(id_priv);
 945         cma_deref_id(id_priv);
 946         wait_for_completion(&id_priv->comp);
 947
 948         if (id_priv->internal_id)
 949                 cma_deref_id(id_priv->id.context);
 950
 951         kfree(id_priv->id.route.path_rec);
 952         kfree(id_priv);
 953 }
 954 EXPORT_SYMBOL(rdma_destroy_id);
 955
 956 static int cma_rep_recv(struct rdma_id_private *id_priv)
 957 {
 958         int ret;
 959
 960         ret = cma_modify_qp_rtr(id_priv, NULL);
 961         if (ret)
 962                 goto reject;
 963
 964         ret = cma_modify_qp_rts(id_priv, NULL);
 965         if (ret)
 966                 goto reject;
 967
 968         ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
 969         if (ret)
 970                 goto reject;
 971
 972         return 0;
 973 reject:
 974         cma_modify_qp_err(id_priv);
 975         ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
 976                        NULL, 0, NULL, 0);
 977         return ret;
 978 }
 979
 980 static int cma_verify_rep(struct rdma_id_private *id_priv, void *data)
 981 {
 982         if (id_priv->id.ps == RDMA_PS_SDP &&
 983             sdp_get_majv(((struct sdp_hah *) data)->sdp_version) !=
 984             SDP_MAJ_VERSION)
 985                 return -EINVAL;
 986
 987         return 0;
 988 }
 989
 990 static void cma_set_rep_event_data(struct rdma_cm_event *event,
 991                                    struct ib_cm_rep_event_param *rep_data,
 992                                    void *private_data)
 993 {
 994         event->param.conn.private_data = private_data;
 995         event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
 996         event->param.conn.responder_resources = rep_data->responder_resources;
 997         event->param.conn.initiator_depth = rep_data->initiator_depth;
 998         event->param.conn.flow_control = rep_data->flow_control;
 999         event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
1000         event->param.conn.srq = rep_data->srq;
1001         event->param.conn.qp_num = rep_data->remote_qpn;
1002 }
1003
1004 static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1005 {
1006         struct rdma_id_private *id_priv = cm_id->context;
1007         struct rdma_cm_event event;
1008         int ret = 0;
1009
1010         if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
1011                 cma_disable_callback(id_priv, RDMA_CM_CONNECT)) ||
1012             (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
1013                 cma_disable_callback(id_priv, RDMA_CM_DISCONNECT)))
1014                 return 0;
1015
1016         memset(&event, 0, sizeof event);
1017         switch (ib_event->event) {
1018         case IB_CM_REQ_ERROR:
1019         case IB_CM_REP_ERROR:
1020                 event.event = RDMA_CM_EVENT_UNREACHABLE;
1021                 event.status = -ETIMEDOUT;
1022                 break;
1023         case IB_CM_REP_RECEIVED:
1024                 event.status = cma_verify_rep(id_priv, ib_event->private_data);
1025                 if (event.status)
1026                         event.event = RDMA_CM_EVENT_CONNECT_ERROR;
1027                 else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) {
1028                         event.status = cma_rep_recv(id_priv);
1029                         event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
1030                                                      RDMA_CM_EVENT_ESTABLISHED;
1031                 } else
1032                         event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
1033                 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
1034                                        ib_event->private_data);
1035                 break;
1036         case IB_CM_RTU_RECEIVED:
1037         case IB_CM_USER_ESTABLISHED:
1038                 event.event = RDMA_CM_EVENT_ESTABLISHED;
1039                 break;
1040         case IB_CM_DREQ_ERROR:
1041                 event.status = -ETIMEDOUT; /* fall through */
1042         case IB_CM_DREQ_RECEIVED:
1043         case IB_CM_DREP_RECEIVED:
1044                 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT,
1045                                    RDMA_CM_DISCONNECT))
1046                         goto out;
1047                 event.event = RDMA_CM_EVENT_DISCONNECTED;
1048                 break;
1049         case IB_CM_TIMEWAIT_EXIT:
1050                 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
1051                 break;
1052         case IB_CM_MRA_RECEIVED:
1053                 /* ignore event */
1054                 goto out;
1055         case IB_CM_REJ_RECEIVED:
1056                 cma_modify_qp_err(id_priv);
1057                 event.status = ib_event->param.rej_rcvd.reason;
1058                 event.event = RDMA_CM_EVENT_REJECTED;
1059                 event.param.conn.private_data = ib_event->private_data;
1060                 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
1061                 break;
1062         default:
1063                 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
1064                        ib_event->event);
1065                 goto out;
1066         }
1067
1068         ret = id_priv->id.event_handler(&id_priv->id, &event);
1069         if (ret) {
1070                 /* Destroy the CM ID by returning a non-zero value. */
1071                 id_priv->cm_id.ib = NULL;
1072                 cma_exch(id_priv, RDMA_CM_DESTROYING);
1073                 mutex_unlock(&id_priv->handler_mutex);
1074                 rdma_destroy_id(&id_priv->id);
1075                 return ret;
1076         }
1077 out:
1078         mutex_unlock(&id_priv->handler_mutex);
1079         return ret;
1080 }
1081
1082 static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
1083                                                struct ib_cm_event *ib_event)
1084 {
1085         struct rdma_id_private *id_priv;
1086         struct rdma_cm_id *id;
1087         struct rdma_route *rt;
1088         union cma_ip_addr *src, *dst;
1089         __be16 port;
1090         u8 ip_ver;
1091         int ret;
1092
1093         if (cma_get_net_info(ib_event->private_data, listen_id->ps,
1094                              &ip_ver, &port, &src, &dst))
1095                 return NULL;
1096
1097         id = rdma_create_id(listen_id->event_handler, listen_id->context,
1098                             listen_id->ps, ib_event->param.req_rcvd.qp_type);
1099         if (IS_ERR(id))
1100                 return NULL;
1101
1102         cma_save_net_info(&id->route.addr, &listen_id->route.addr,
1103                           ip_ver, port, src, dst);
1104
1105         rt = &id->route;
1106         rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
1107         rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
1108                                GFP_KERNEL);
1109         if (!rt->path_rec)
1110                 goto err;
1111
1112         rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
1113         if (rt->num_paths == 2)
1114                 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1115
1116         if (cma_any_addr((struct sockaddr *) &rt->addr.src_addr)) {
1117                 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
1118                 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
1119                 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
1120         } else {
1121                 ret = rdma_translate_ip((struct sockaddr *) &rt->addr.src_addr,
1122                                         &rt->addr.dev_addr);
1123                 if (ret)
1124                         goto err;
1125         }
1126         rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
1127
1128         id_priv = container_of(id, struct rdma_id_private, id);
1129         id_priv->state = RDMA_CM_CONNECT;
1130         return id_priv;
1131
1132 err:
1133         rdma_destroy_id(id);
1134         return NULL;
1135 }
1136
1137 static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
1138                                               struct ib_cm_event *ib_event)
1139 {
1140         struct rdma_id_private *id_priv;
1141         struct rdma_cm_id *id;
1142         union cma_ip_addr *src, *dst;
1143         __be16 port;
1144         u8 ip_ver;
1145         int ret;
1146
1147         id = rdma_create_id(listen_id->event_handler, listen_id->context,
1148                             listen_id->ps, IB_QPT_UD);
1149         if (IS_ERR(id))
1150                 return NULL;
1151
1152
1153         if (cma_get_net_info(ib_event->private_data, listen_id->ps,
1154                              &ip_ver, &port, &src, &dst))
1155                 goto err;
1156
1157         cma_save_net_info(&id->route.addr, &listen_id->route.addr,
1158                           ip_ver, port, src, dst);
1159
1160         if (!cma_any_addr((struct sockaddr *) &id->route.addr.src_addr)) {
1161                 ret = rdma_translate_ip((struct sockaddr *) &id->route.addr.src_addr,
1162                                         &id->route.addr.dev_addr);
1163                 if (ret)
1164                         goto err;
1165         }
1166
1167         id_priv = container_of(id, struct rdma_id_private, id);
1168         id_priv->state = RDMA_CM_CONNECT;
1169         return id_priv;
1170 err:
1171         rdma_destroy_id(id);
1172         return NULL;
1173 }
1174
1175 static void cma_set_req_event_data(struct rdma_cm_event *event,
1176                                    struct ib_cm_req_event_param *req_data,
1177                                    void *private_data, int offset)
1178 {
1179         event->param.conn.private_data = private_data + offset;
1180         event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1181         event->param.conn.responder_resources = req_data->responder_resources;
1182         event->param.conn.initiator_depth = req_data->initiator_depth;
1183         event->param.conn.flow_control = req_data->flow_control;
1184         event->param.conn.retry_count = req_data->retry_count;
1185         event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1186         event->param.conn.srq = req_data->srq;
1187         event->param.conn.qp_num = req_data->remote_qpn;
1188 }
1189
1190 static int cma_check_req_qp_type(struct rdma_cm_id *id, struct ib_cm_event *ib_event)
1191 {
1192         return (((ib_event->event == IB_CM_REQ_RECEIVED) &&
1193                  (ib_event->param.req_rcvd.qp_type == id->qp_type)) ||
1194                 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) &&
1195                  (id->qp_type == IB_QPT_UD)) ||
1196                 (!id->qp_type));
1197 }
1198
1199 static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1200 {
1201         struct rdma_id_private *listen_id, *conn_id;
1202         struct rdma_cm_event event;
1203         int offset, ret;
1204
1205         listen_id = cm_id->context;
1206         if (!cma_check_req_qp_type(&listen_id->id, ib_event))
1207                 return -EINVAL;
1208
1209         if (cma_disable_callback(listen_id, RDMA_CM_LISTEN))
1210                 return -ECONNABORTED;
1211
1212         memset(&event, 0, sizeof event);
1213         offset = cma_user_data_offset(listen_id->id.ps);
1214         event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1215         if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) {
1216                 conn_id = cma_new_udp_id(&listen_id->id, ib_event);
1217                 event.param.ud.private_data = ib_event->private_data + offset;
1218                 event.param.ud.private_data_len =
1219                                 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1220         } else {
1221                 conn_id = cma_new_conn_id(&listen_id->id, ib_event);
1222                 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1223                                        ib_event->private_data, offset);
1224         }
1225         if (!conn_id) {
1226                 ret = -ENOMEM;
1227                 goto err1;
1228         }
1229
1230         mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
1231         ret = cma_acquire_dev(conn_id);
1232         if (ret)
1233                 goto err2;
1234
1235         conn_id->cm_id.ib = cm_id;
1236         cm_id->context = conn_id;
1237         cm_id->cm_handler = cma_ib_handler;
1238
1239         /*
1240          * Protect against the user destroying conn_id from another thread
1241          * until we're done accessing it.
1242          */
1243         atomic_inc(&conn_id->refcount);
1244         ret = conn_id->id.event_handler(&conn_id->id, &event);
1245         if (ret)
1246                 goto err3;
1247
1248         /*
1249          * Acquire mutex to prevent user executing rdma_destroy_id()
1250          * while we're accessing the cm_id.
1251          */
1252         mutex_lock(&lock);
1253         if (cma_comp(conn_id, RDMA_CM_CONNECT) && (conn_id->id.qp_type != IB_QPT_UD))
1254                 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1255         mutex_unlock(&lock);
1256         mutex_unlock(&conn_id->handler_mutex);
1257         mutex_unlock(&listen_id->handler_mutex);
1258         cma_deref_id(conn_id);
1259         return 0;
1260
1261 err3:
1262         cma_deref_id(conn_id);
1263         /* Destroy the CM ID by returning a non-zero value. */
1264         conn_id->cm_id.ib = NULL;
1265 err2:
1266         cma_exch(conn_id, RDMA_CM_DESTROYING);
1267         mutex_unlock(&conn_id->handler_mutex);
1268 err1:
1269         mutex_unlock(&listen_id->handler_mutex);
1270         if (conn_id)
1271                 rdma_destroy_id(&conn_id->id);
1272         return ret;
1273 }
1274
1275 static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr)
1276 {
1277         return cpu_to_be64(((u64)ps << 16) + be16_to_cpu(cma_port(addr)));
1278 }
1279
1280 static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr,
1281                                  struct ib_cm_compare_data *compare)
1282 {
1283         struct cma_hdr *cma_data, *cma_mask;
1284         struct sdp_hh *sdp_data, *sdp_mask;
1285         __be32 ip4_addr;
1286         struct in6_addr ip6_addr;
1287
1288         memset(compare, 0, sizeof *compare);
1289         cma_data = (void *) compare->data;
1290         cma_mask = (void *) compare->mask;
1291         sdp_data = (void *) compare->data;
1292         sdp_mask = (void *) compare->mask;
1293
1294         switch (addr->sa_family) {
1295         case AF_INET:
1296                 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
1297                 if (ps == RDMA_PS_SDP) {
1298                         sdp_set_ip_ver(sdp_data, 4);
1299                         sdp_set_ip_ver(sdp_mask, 0xF);
1300                         sdp_data->dst_addr.ip4.addr = ip4_addr;
1301                         sdp_mask->dst_addr.ip4.addr = htonl(~0);
1302                 } else {
1303                         cma_set_ip_ver(cma_data, 4);
1304                         cma_set_ip_ver(cma_mask, 0xF);
1305                         if (!cma_any_addr(addr)) {
1306                                 cma_data->dst_addr.ip4.addr = ip4_addr;
1307                                 cma_mask->dst_addr.ip4.addr = htonl(~0);
1308                         }
1309                 }
1310                 break;
1311         case AF_INET6:
1312                 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr;
1313                 if (ps == RDMA_PS_SDP) {
1314                         sdp_set_ip_ver(sdp_data, 6);
1315                         sdp_set_ip_ver(sdp_mask, 0xF);
1316                         sdp_data->dst_addr.ip6 = ip6_addr;
1317                         memset(&sdp_mask->dst_addr.ip6, 0xFF,
1318                                sizeof sdp_mask->dst_addr.ip6);
1319                 } else {
1320                         cma_set_ip_ver(cma_data, 6);
1321                         cma_set_ip_ver(cma_mask, 0xF);
1322                         if (!cma_any_addr(addr)) {
1323                                 cma_data->dst_addr.ip6 = ip6_addr;
1324                                 memset(&cma_mask->dst_addr.ip6, 0xFF,
1325                                        sizeof cma_mask->dst_addr.ip6);
1326                         }
1327                 }
1328                 break;
1329         default:
1330                 break;
1331         }
1332 }
1333
1334 static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
1335 {
1336         struct rdma_id_private *id_priv = iw_id->context;
1337         struct rdma_cm_event event;
1338         struct sockaddr_in *sin;
1339         int ret = 0;
1340
1341         if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
1342                 return 0;
1343
1344         memset(&event, 0, sizeof event);
1345         switch (iw_event->event) {
1346         case IW_CM_EVENT_CLOSE:
1347                 event.event = RDMA_CM_EVENT_DISCONNECTED;
1348                 break;
1349         case IW_CM_EVENT_CONNECT_REPLY:
1350                 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1351                 *sin = iw_event->local_addr;
1352                 sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr;
1353                 *sin = iw_event->remote_addr;
1354                 switch (iw_event->status) {
1355                 case 0:
1356                         event.event = RDMA_CM_EVENT_ESTABLISHED;
1357                         event.param.conn.initiator_depth = iw_event->ird;
1358                         event.param.conn.responder_resources = iw_event->ord;
1359                         break;
1360                 case -ECONNRESET:
1361                 case -ECONNREFUSED:
1362                         event.event = RDMA_CM_EVENT_REJECTED;
1363                         break;
1364                 case -ETIMEDOUT:
1365                         event.event = RDMA_CM_EVENT_UNREACHABLE;
1366                         break;
1367                 default:
1368                         event.event = RDMA_CM_EVENT_CONNECT_ERROR;
1369                         break;
1370                 }
1371                 break;
1372         case IW_CM_EVENT_ESTABLISHED:
1373                 event.event = RDMA_CM_EVENT_ESTABLISHED;
1374                 event.param.conn.initiator_depth = iw_event->ird;
1375                 event.param.conn.responder_resources = iw_event->ord;
1376                 break;
1377         default:
1378                 BUG_ON(1);
1379         }
1380
1381         event.status = iw_event->status;
1382         event.param.conn.private_data = iw_event->private_data;
1383         event.param.conn.private_data_len = iw_event->private_data_len;
1384         ret = id_priv->id.event_handler(&id_priv->id, &event);
1385         if (ret) {
1386                 /* Destroy the CM ID by returning a non-zero value. */
1387                 id_priv->cm_id.iw = NULL;
1388                 cma_exch(id_priv, RDMA_CM_DESTROYING);
1389                 mutex_unlock(&id_priv->handler_mutex);
1390                 rdma_destroy_id(&id_priv->id);
1391                 return ret;
1392         }
1393
1394         mutex_unlock(&id_priv->handler_mutex);
1395         return ret;
1396 }
1397
1398 static int iw_conn_req_handler(struct iw_cm_id *cm_id,
1399                                struct iw_cm_event *iw_event)
1400 {
1401         struct rdma_cm_id *new_cm_id;
1402         struct rdma_id_private *listen_id, *conn_id;
1403         struct sockaddr_in *sin;
1404         struct net_device *dev = NULL;
1405         struct rdma_cm_event event;
1406         int ret;
1407         struct ib_device_attr attr;
1408
1409         listen_id = cm_id->context;
1410         if (cma_disable_callback(listen_id, RDMA_CM_LISTEN))
1411                 return -ECONNABORTED;
1412
1413         /* Create a new RDMA id for the new IW CM ID */
1414         new_cm_id = rdma_create_id(listen_id->id.event_handler,
1415                                    listen_id->id.context,
1416                                    RDMA_PS_TCP, IB_QPT_RC);
1417         if (IS_ERR(new_cm_id)) {
1418                 ret = -ENOMEM;
1419                 goto out;
1420         }
1421         conn_id = container_of(new_cm_id, struct rdma_id_private, id);
1422         mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
1423         conn_id->state = RDMA_CM_CONNECT;
1424
1425         dev = ip_dev_find(&init_net, iw_event->local_addr.sin_addr.s_addr);
1426         if (!dev) {
1427                 ret = -EADDRNOTAVAIL;
1428                 mutex_unlock(&conn_id->handler_mutex);
1429                 rdma_destroy_id(new_cm_id);
1430                 goto out;
1431         }
1432         ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL);
1433         if (ret) {
1434                 mutex_unlock(&conn_id->handler_mutex);
1435                 rdma_destroy_id(new_cm_id);
1436                 goto out;
1437         }
1438
1439         ret = cma_acquire_dev(conn_id);
1440         if (ret) {
1441                 mutex_unlock(&conn_id->handler_mutex);
1442                 rdma_destroy_id(new_cm_id);
1443                 goto out;
1444         }
1445
1446         conn_id->cm_id.iw = cm_id;
1447         cm_id->context = conn_id;
1448         cm_id->cm_handler = cma_iw_handler;
1449
1450         sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr;
1451         *sin = iw_event->local_addr;
1452         sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr;
1453         *sin = iw_event->remote_addr;
1454
1455         ret = ib_query_device(conn_id->id.device, &attr);
1456         if (ret) {
1457                 mutex_unlock(&conn_id->handler_mutex);
1458                 rdma_destroy_id(new_cm_id);
1459                 goto out;
1460         }
1461
1462         memset(&event, 0, sizeof event);
1463         event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1464         event.param.conn.private_data = iw_event->private_data;
1465         event.param.conn.private_data_len = iw_event->private_data_len;
1466         event.param.conn.initiator_depth = iw_event->ird;
1467         event.param.conn.responder_resources = iw_event->ord;
1468
1469         /*
1470          * Protect against the user destroying conn_id from another thread
1471          * until we're done accessing it.
1472          */
1473         atomic_inc(&conn_id->refcount);
1474         ret = conn_id->id.event_handler(&conn_id->id, &event);
1475         if (ret) {
1476                 /* User wants to destroy the CM ID */
1477                 conn_id->cm_id.iw = NULL;
1478                 cma_exch(conn_id, RDMA_CM_DESTROYING);
1479                 mutex_unlock(&conn_id->handler_mutex);
1480                 cma_deref_id(conn_id);
1481                 rdma_destroy_id(&conn_id->id);
1482                 goto out;
1483         }
1484
1485         mutex_unlock(&conn_id->handler_mutex);
1486         cma_deref_id(conn_id);
1487
1488 out:
1489         if (dev)
1490                 dev_put(dev);
1491         mutex_unlock(&listen_id->handler_mutex);
1492         return ret;
1493 }
1494
1495 static int cma_ib_listen(struct rdma_id_private *id_priv)
1496 {
1497         struct ib_cm_compare_data compare_data;
1498         struct sockaddr *addr;
1499         struct ib_cm_id *id;
1500         __be64 svc_id;
1501         int ret;
1502
1503         id = ib_create_cm_id(id_priv->id.device, cma_req_handler, id_priv);
1504         if (IS_ERR(id))
1505                 return PTR_ERR(id);
1506
1507         id_priv->cm_id.ib = id;
1508
1509         addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
1510         svc_id = cma_get_service_id(id_priv->id.ps, addr);
1511         if (cma_any_addr(addr) && !id_priv->afonly)
1512                 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL);
1513         else {
1514                 cma_set_compare_data(id_priv->id.ps, addr, &compare_data);
1515                 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data);
1516         }
1517
1518         if (ret) {
1519                 ib_destroy_cm_id(id_priv->cm_id.ib);
1520                 id_priv->cm_id.ib = NULL;
1521         }
1522
1523         return ret;
1524 }
1525
1526 static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
1527 {
1528         int ret;
1529         struct sockaddr_in *sin;
1530         struct iw_cm_id *id;
1531
1532         id = iw_create_cm_id(id_priv->id.device,
1533                              iw_conn_req_handler,
1534                              id_priv);
1535         if (IS_ERR(id))
1536                 return PTR_ERR(id);
1537
1538         id_priv->cm_id.iw = id;
1539
1540         sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1541         id_priv->cm_id.iw->local_addr = *sin;
1542
1543         ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
1544
1545         if (ret) {
1546                 iw_destroy_cm_id(id_priv->cm_id.iw);
1547                 id_priv->cm_id.iw = NULL;
1548         }
1549
1550         return ret;
1551 }
1552
1553 static int cma_listen_handler(struct rdma_cm_id *id,
1554                               struct rdma_cm_event *event)
1555 {
1556         struct rdma_id_private *id_priv = id->context;
1557
1558         id->context = id_priv->id.context;
1559         id->event_handler = id_priv->id.event_handler;
1560         return id_priv->id.event_handler(id, event);
1561 }
1562
1563 static void cma_listen_on_dev(struct rdma_id_private *id_priv,
1564                               struct cma_device *cma_dev)
1565 {
1566         struct rdma_id_private *dev_id_priv;
1567         struct rdma_cm_id *id;
1568         int ret;
1569
1570         id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps,
1571                             id_priv->id.qp_type);
1572         if (IS_ERR(id))
1573                 return;
1574
1575         dev_id_priv = container_of(id, struct rdma_id_private, id);
1576
1577         dev_id_priv->state = RDMA_CM_ADDR_BOUND;
1578         memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr,
1579                ip_addr_size((struct sockaddr *) &id_priv->id.route.addr.src_addr));
1580
1581         cma_attach_to_dev(dev_id_priv, cma_dev);
1582         list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
1583         atomic_inc(&id_priv->refcount);
1584         dev_id_priv->internal_id = 1;
1585         dev_id_priv->afonly = id_priv->afonly;
1586
1587         ret = rdma_listen(id, id_priv->backlog);
1588         if (ret)
1589                 printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, "
1590                        "listening on device %s\n", ret, cma_dev->device->name);
1591 }
1592
1593 static void cma_listen_on_all(struct rdma_id_private *id_priv)
1594 {
1595         struct cma_device *cma_dev;
1596
1597         mutex_lock(&lock);
1598         list_add_tail(&id_priv->list, &listen_any_list);
1599         list_for_each_entry(cma_dev, &dev_list, list)
1600                 cma_listen_on_dev(id_priv, cma_dev);
1601         mutex_unlock(&lock);
1602 }
1603
1604 void rdma_set_service_type(struct rdma_cm_id *id, int tos)
1605 {
1606         struct rdma_id_private *id_priv;
1607
1608         id_priv = container_of(id, struct rdma_id_private, id);
1609         id_priv->tos = (u8) tos;
1610 }
1611 EXPORT_SYMBOL(rdma_set_service_type);
1612
1613 static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
1614                               void *context)
1615 {
1616         struct cma_work *work = context;
1617         struct rdma_route *route;
1618
1619         route = &work->id->id.route;
1620
1621         if (!status) {
1622                 route->num_paths = 1;
1623                 *route->path_rec = *path_rec;
1624         } else {
1625                 work->old_state = RDMA_CM_ROUTE_QUERY;
1626                 work->new_state = RDMA_CM_ADDR_RESOLVED;
1627                 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
1628                 work->event.status = status;
1629         }
1630
1631         queue_work(cma_wq, &work->work);
1632 }
1633
1634 static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
1635                               struct cma_work *work)
1636 {
1637         struct rdma_addr *addr = &id_priv->id.route.addr;
1638         struct ib_sa_path_rec path_rec;
1639         ib_sa_comp_mask comp_mask;
1640         struct sockaddr_in6 *sin6;
1641
1642         memset(&path_rec, 0, sizeof path_rec);
1643         rdma_addr_get_sgid(&addr->dev_addr, &path_rec.sgid);
1644         rdma_addr_get_dgid(&addr->dev_addr, &path_rec.dgid);
1645         path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(&addr->dev_addr));
1646         path_rec.numb_path = 1;
1647         path_rec.reversible = 1;
1648         path_rec.service_id = cma_get_service_id(id_priv->id.ps,
1649                                                         (struct sockaddr *) &addr->dst_addr);
1650
1651         comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
1652                     IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
1653                     IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
1654
1655         if (addr->src_addr.ss_family == AF_INET) {
1656                 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
1657                 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
1658         } else {
1659                 sin6 = (struct sockaddr_in6 *) &addr->src_addr;
1660                 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
1661                 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
1662         }
1663
1664         id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
1665                                                id_priv->id.port_num, &path_rec,
1666                                                comp_mask, timeout_ms,
1667                                                GFP_KERNEL, cma_query_handler,
1668                                                work, &id_priv->query);
1669
1670         return (id_priv->query_id < 0) ? id_priv->query_id : 0;
1671 }
1672
1673 static void cma_work_handler(struct work_struct *_work)
1674 {
1675         struct cma_work *work = container_of(_work, struct cma_work, work);
1676         struct rdma_id_private *id_priv = work->id;
1677         int destroy = 0;
1678
1679         mutex_lock(&id_priv->handler_mutex);
1680         if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
1681                 goto out;
1682
1683         if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1684                 cma_exch(id_priv, RDMA_CM_DESTROYING);
1685                 destroy = 1;
1686         }
1687 out:
1688         mutex_unlock(&id_priv->handler_mutex);
1689         cma_deref_id(id_priv);
1690         if (destroy)
1691                 rdma_destroy_id(&id_priv->id);
1692         kfree(work);
1693 }
1694
1695 static void cma_ndev_work_handler(struct work_struct *_work)
1696 {
1697         struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
1698         struct rdma_id_private *id_priv = work->id;
1699         int destroy = 0;
1700
1701         mutex_lock(&id_priv->handler_mutex);
1702         if (id_priv->state == RDMA_CM_DESTROYING ||
1703             id_priv->state == RDMA_CM_DEVICE_REMOVAL)
1704                 goto out;
1705
1706         if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1707                 cma_exch(id_priv, RDMA_CM_DESTROYING);
1708                 destroy = 1;
1709         }
1710
1711 out:
1712         mutex_unlock(&id_priv->handler_mutex);
1713         cma_deref_id(id_priv);
1714         if (destroy)
1715                 rdma_destroy_id(&id_priv->id);
1716         kfree(work);
1717 }
1718
1719 static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
1720 {
1721         struct rdma_route *route = &id_priv->id.route;
1722         struct cma_work *work;
1723         int ret;
1724
1725         work = kzalloc(sizeof *work, GFP_KERNEL);
1726         if (!work)
1727                 return -ENOMEM;
1728
1729         work->id = id_priv;
1730         INIT_WORK(&work->work, cma_work_handler);
1731         work->old_state = RDMA_CM_ROUTE_QUERY;
1732         work->new_state = RDMA_CM_ROUTE_RESOLVED;
1733         work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1734
1735         route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
1736         if (!route->path_rec) {
1737                 ret = -ENOMEM;
1738                 goto err1;
1739         }
1740
1741         ret = cma_query_ib_route(id_priv, timeout_ms, work);
1742         if (ret)
1743                 goto err2;
1744
1745         return 0;
1746 err2:
1747         kfree(route->path_rec);
1748         route->path_rec = NULL;
1749 err1:
1750         kfree(work);
1751         return ret;
1752 }
1753
1754 int rdma_set_ib_paths(struct rdma_cm_id *id,
1755                       struct ib_sa_path_rec *path_rec, int num_paths)
1756 {
1757         struct rdma_id_private *id_priv;
1758         int ret;
1759
1760         id_priv = container_of(id, struct rdma_id_private, id);
1761         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
1762                            RDMA_CM_ROUTE_RESOLVED))
1763                 return -EINVAL;
1764
1765         id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths,
1766                                      GFP_KERNEL);
1767         if (!id->route.path_rec) {
1768                 ret = -ENOMEM;
1769                 goto err;
1770         }
1771
1772         id->route.num_paths = num_paths;
1773         return 0;
1774 err:
1775         cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED);
1776         return ret;
1777 }
1778 EXPORT_SYMBOL(rdma_set_ib_paths);
1779
1780 static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
1781 {
1782         struct cma_work *work;
1783
1784         work = kzalloc(sizeof *work, GFP_KERNEL);
1785         if (!work)
1786                 return -ENOMEM;
1787
1788         work->id = id_priv;
1789         INIT_WORK(&work->work, cma_work_handler);
1790         work->old_state = RDMA_CM_ROUTE_QUERY;
1791         work->new_state = RDMA_CM_ROUTE_RESOLVED;
1792         work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1793         queue_work(cma_wq, &work->work);
1794         return 0;
1795 }
1796
1797 static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
1798 {
1799         struct rdma_route *route = &id_priv->id.route;
1800         struct rdma_addr *addr = &route->addr;
1801         struct cma_work *work;
1802         int ret;
1803         struct sockaddr_in *src_addr = (struct sockaddr_in *)&route->addr.src_addr;
1804         struct sockaddr_in *dst_addr = (struct sockaddr_in *)&route->addr.dst_addr;
1805         struct net_device *ndev = NULL;
1806         u16 vid;
1807
1808         if (src_addr->sin_family != dst_addr->sin_family)
1809                 return -EINVAL;
1810
1811         work = kzalloc(sizeof *work, GFP_KERNEL);
1812         if (!work)
1813                 return -ENOMEM;
1814
1815         work->id = id_priv;
1816         INIT_WORK(&work->work, cma_work_handler);
1817
1818         route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
1819         if (!route->path_rec) {
1820                 ret = -ENOMEM;
1821                 goto err1;
1822         }
1823
1824         route->num_paths = 1;
1825
1826         if (addr->dev_addr.bound_dev_if)
1827                 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if);
1828         if (!ndev) {
1829                 ret = -ENODEV;
1830                 goto err2;
1831         }
1832
1833         vid = rdma_vlan_dev_vlan_id(ndev);
1834
1835         iboe_mac_vlan_to_ll(&route->path_rec->sgid, addr->dev_addr.src_dev_addr, vid);
1836         iboe_mac_vlan_to_ll(&route->path_rec->dgid, addr->dev_addr.dst_dev_addr, vid);
1837
1838         route->path_rec->hop_limit = 1;
1839         route->path_rec->reversible = 1;
1840         route->path_rec->pkey = cpu_to_be16(0xffff);
1841         route->path_rec->mtu_selector = IB_SA_EQ;
1842         route->path_rec->sl = netdev_get_prio_tc_map(
1843                         ndev->priv_flags & IFF_802_1Q_VLAN ?
1844                                 vlan_dev_real_dev(ndev) : ndev,
1845                         rt_tos2priority(id_priv->tos));
1846
1847         route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
1848         route->path_rec->rate_selector = IB_SA_EQ;
1849         route->path_rec->rate = iboe_get_rate(ndev);
1850         dev_put(ndev);
1851         route->path_rec->packet_life_time_selector = IB_SA_EQ;
1852         route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
1853         if (!route->path_rec->mtu) {
1854                 ret = -EINVAL;
1855                 goto err2;
1856         }
1857
1858         work->old_state = RDMA_CM_ROUTE_QUERY;
1859         work->new_state = RDMA_CM_ROUTE_RESOLVED;
1860         work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1861         work->event.status = 0;
1862
1863         queue_work(cma_wq, &work->work);
1864
1865         return 0;
1866
1867 err2:
1868         kfree(route->path_rec);
1869         route->path_rec = NULL;
1870 err1:
1871         kfree(work);
1872         return ret;
1873 }
1874
1875 int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
1876 {
1877         struct rdma_id_private *id_priv;
1878         int ret;
1879
1880         id_priv = container_of(id, struct rdma_id_private, id);
1881         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY))
1882                 return -EINVAL;
1883
1884         atomic_inc(&id_priv->refcount);
1885         switch (rdma_node_get_transport(id->device->node_type)) {
1886         case RDMA_TRANSPORT_IB:
1887                 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
1888                 case IB_LINK_LAYER_INFINIBAND:
1889                         ret = cma_resolve_ib_route(id_priv, timeout_ms);
1890                         break;
1891                 case IB_LINK_LAYER_ETHERNET:
1892                         ret = cma_resolve_iboe_route(id_priv);
1893                         break;
1894                 default:
1895                         ret = -ENOSYS;
1896                 }
1897                 break;
1898         case RDMA_TRANSPORT_IWARP:
1899                 ret = cma_resolve_iw_route(id_priv, timeout_ms);
1900                 break;
1901         default:
1902                 ret = -ENOSYS;
1903                 break;
1904         }
1905         if (ret)
1906                 goto err;
1907
1908         return 0;
1909 err:
1910         cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED);
1911         cma_deref_id(id_priv);
1912         return ret;
1913 }
1914 EXPORT_SYMBOL(rdma_resolve_route);
1915
1916 static int cma_bind_loopback(struct rdma_id_private *id_priv)
1917 {
1918         struct cma_device *cma_dev;
1919         struct ib_port_attr port_attr;
1920         union ib_gid gid;
1921         u16 pkey;
1922         int ret;
1923         u8 p;
1924
1925         mutex_lock(&lock);
1926         if (list_empty(&dev_list)) {
1927                 ret = -ENODEV;
1928                 goto out;
1929         }
1930         list_for_each_entry(cma_dev, &dev_list, list)
1931                 for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p)
1932                         if (!ib_query_port(cma_dev->device, p, &port_attr) &&
1933                             port_attr.state == IB_PORT_ACTIVE)
1934                                 goto port_found;
1935
1936         p = 1;
1937         cma_dev = list_entry(dev_list.next, struct cma_device, list);
1938
1939 port_found:
1940         ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid);
1941         if (ret)
1942                 goto out;
1943
1944         ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
1945         if (ret)
1946                 goto out;
1947
1948         id_priv->id.route.addr.dev_addr.dev_type =
1949                 (rdma_port_get_link_layer(cma_dev->device, p) == IB_LINK_LAYER_INFINIBAND) ?
1950                 ARPHRD_INFINIBAND : ARPHRD_ETHER;
1951
1952         rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
1953         ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
1954         id_priv->id.port_num = p;
1955         cma_attach_to_dev(id_priv, cma_dev);
1956 out:
1957         mutex_unlock(&lock);
1958         return ret;
1959 }
1960
1961 static void addr_handler(int status, struct sockaddr *src_addr,
1962                          struct rdma_dev_addr *dev_addr, void *context)
1963 {
1964         struct rdma_id_private *id_priv = context;
1965         struct rdma_cm_event event;
1966
1967         memset(&event, 0, sizeof event);
1968         mutex_lock(&id_priv->handler_mutex);
1969         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY,
1970                            RDMA_CM_ADDR_RESOLVED))
1971                 goto out;
1972
1973         if (!status && !id_priv->cma_dev)
1974                 status = cma_acquire_dev(id_priv);
1975
1976         if (status) {
1977                 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
1978                                    RDMA_CM_ADDR_BOUND))
1979                         goto out;
1980                 event.event = RDMA_CM_EVENT_ADDR_ERROR;
1981                 event.status = status;
1982         } else {
1983                 memcpy(&id_priv->id.route.addr.src_addr, src_addr,
1984                        ip_addr_size(src_addr));
1985                 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
1986         }
1987
1988         if (id_priv->id.event_handler(&id_priv->id, &event)) {
1989                 cma_exch(id_priv, RDMA_CM_DESTROYING);
1990                 mutex_unlock(&id_priv->handler_mutex);
1991                 cma_deref_id(id_priv);
1992                 rdma_destroy_id(&id_priv->id);
1993                 return;
1994         }
1995 out:
1996         mutex_unlock(&id_priv->handler_mutex);
1997         cma_deref_id(id_priv);
1998 }
1999
2000 static int cma_resolve_loopback(struct rdma_id_private *id_priv)
2001 {
2002         struct cma_work *work;
2003         struct sockaddr *src, *dst;
2004         union ib_gid gid;
2005         int ret;
2006
2007         work = kzalloc(sizeof *work, GFP_KERNEL);
2008         if (!work)
2009                 return -ENOMEM;
2010
2011         if (!id_priv->cma_dev) {
2012                 ret = cma_bind_loopback(id_priv);
2013                 if (ret)
2014                         goto err;
2015         }
2016
2017         rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2018         rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
2019
2020         src = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
2021         if (cma_zero_addr(src)) {
2022                 dst = (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
2023                 if ((src->sa_family = dst->sa_family) == AF_INET) {
2024                         ((struct sockaddr_in *)src)->sin_addr =
2025                                 ((struct sockaddr_in *)dst)->sin_addr;
2026                 } else {
2027                         ((struct sockaddr_in6 *)src)->sin6_addr =
2028                                 ((struct sockaddr_in6 *)dst)->sin6_addr;
2029                 }
2030         }
2031
2032         work->id = id_priv;
2033         INIT_WORK(&work->work, cma_work_handler);
2034         work->old_state = RDMA_CM_ADDR_QUERY;
2035         work->new_state = RDMA_CM_ADDR_RESOLVED;
2036         work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2037         queue_work(cma_wq, &work->work);
2038         return 0;
2039 err:
2040         kfree(work);
2041         return ret;
2042 }
2043
2044 static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2045                          struct sockaddr *dst_addr)
2046 {
2047         if (!src_addr || !src_addr->sa_family) {
2048                 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
2049                 if ((src_addr->sa_family = dst_addr->sa_family) == AF_INET6) {
2050                         ((struct sockaddr_in6 *) src_addr)->sin6_scope_id =
2051                                 ((struct sockaddr_in6 *) dst_addr)->sin6_scope_id;
2052                 }
2053         }
2054         return rdma_bind_addr(id, src_addr);
2055 }
2056
2057 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2058                       struct sockaddr *dst_addr, int timeout_ms)
2059 {
2060         struct rdma_id_private *id_priv;
2061         int ret;
2062
2063         id_priv = container_of(id, struct rdma_id_private, id);
2064         if (id_priv->state == RDMA_CM_IDLE) {
2065                 ret = cma_bind_addr(id, src_addr, dst_addr);
2066                 if (ret)
2067                         return ret;
2068         }
2069
2070         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY))
2071                 return -EINVAL;
2072
2073         atomic_inc(&id_priv->refcount);
2074         memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr));
2075         if (cma_any_addr(dst_addr))
2076                 ret = cma_resolve_loopback(id_priv);
2077         else
2078                 ret = rdma_resolve_ip(&addr_client, (struct sockaddr *) &id->route.addr.src_addr,
2079                                       dst_addr, &id->route.addr.dev_addr,
2080                                       timeout_ms, addr_handler, id_priv);
2081         if (ret)
2082                 goto err;
2083
2084         return 0;
2085 err:
2086         cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
2087         cma_deref_id(id_priv);
2088         return ret;
2089 }
2090 EXPORT_SYMBOL(rdma_resolve_addr);
2091
2092 int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
2093 {
2094         struct rdma_id_private *id_priv;
2095         unsigned long flags;
2096         int ret;
2097
2098         id_priv = container_of(id, struct rdma_id_private, id);
2099         spin_lock_irqsave(&id_priv->lock, flags);
2100         if (id_priv->state == RDMA_CM_IDLE) {
2101                 id_priv->reuseaddr = reuse;
2102                 ret = 0;
2103         } else {
2104                 ret = -EINVAL;
2105         }
2106         spin_unlock_irqrestore(&id_priv->lock, flags);
2107         return ret;
2108 }
2109 EXPORT_SYMBOL(rdma_set_reuseaddr);
2110
2111 int rdma_set_afonly(struct rdma_cm_id *id, int afonly)
2112 {
2113         struct rdma_id_private *id_priv;
2114         unsigned long flags;
2115         int ret;
2116
2117         id_priv = container_of(id, struct rdma_id_private, id);
2118         spin_lock_irqsave(&id_priv->lock, flags);
2119         if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) {
2120                 id_priv->options |= (1 << CMA_OPTION_AFONLY);
2121                 id_priv->afonly = afonly;
2122                 ret = 0;
2123         } else {
2124                 ret = -EINVAL;
2125         }
2126         spin_unlock_irqrestore(&id_priv->lock, flags);
2127         return ret;
2128 }
2129 EXPORT_SYMBOL(rdma_set_afonly);
2130
2131 static void cma_bind_port(struct rdma_bind_list *bind_list,
2132                           struct rdma_id_private *id_priv)
2133 {
2134         struct sockaddr_in *sin;
2135
2136         sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
2137         sin->sin_port = htons(bind_list->port);
2138         id_priv->bind_list = bind_list;
2139         hlist_add_head(&id_priv->node, &bind_list->owners);
2140 }
2141
2142 static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv,
2143                           unsigned short snum)
2144 {
2145         struct rdma_bind_list *bind_list;
2146         int ret;
2147
2148         bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
2149         if (!bind_list)
2150                 return -ENOMEM;
2151
2152         ret = idr_alloc(ps, bind_list, snum, snum + 1, GFP_KERNEL);
2153         if (ret < 0)
2154                 goto err;
2155
2156         bind_list->ps = ps;
2157         bind_list->port = (unsigned short)ret;
2158         cma_bind_port(bind_list, id_priv);
2159         return 0;
2160 err:
2161         kfree(bind_list);
2162         return ret == -ENOSPC ? -EADDRNOTAVAIL : ret;
2163 }
2164
2165 static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv)
2166 {
2167         static unsigned int last_used_port;
2168         int low, high, remaining;
2169         unsigned int rover;
2170
2171         inet_get_local_port_range(&low, &high);
2172         remaining = (high - low) + 1;
2173         rover = net_random() % remaining + low;
2174 retry:
2175         if (last_used_port != rover &&
2176             !idr_find(ps, (unsigned short) rover)) {
2177                 int ret = cma_alloc_port(ps, id_priv, rover);
2178                 /*
2179                  * Remember previously used port number in order to avoid
2180                  * re-using same port immediately after it is closed.
2181                  */
2182                 if (!ret)
2183                         last_used_port = rover;
2184                 if (ret != -EADDRNOTAVAIL)
2185                         return ret;
2186         }
2187         if (--remaining) {
2188                 rover++;
2189                 if ((rover < low) || (rover > high))
2190                         rover = low;
2191                 goto retry;
2192         }
2193         return -EADDRNOTAVAIL;
2194 }
2195
2196 /*
2197  * Check that the requested port is available.  This is called when trying to
2198  * bind to a specific port, or when trying to listen on a bound port.  In
2199  * the latter case, the provided id_priv may already be on the bind_list, but
2200  * we still need to check that it's okay to start listening.
2201  */
2202 static int cma_check_port(struct rdma_bind_list *bind_list,
2203                           struct rdma_id_private *id_priv, uint8_t reuseaddr)
2204 {
2205         struct rdma_id_private *cur_id;
2206         struct sockaddr *addr, *cur_addr;
2207
2208         addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
2209         hlist_for_each_entry(cur_id, &bind_list->owners, node) {
2210                 if (id_priv == cur_id)
2211                         continue;
2212
2213                 if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr &&
2214                     cur_id->reuseaddr)
2215                         continue;
2216
2217                 cur_addr = (struct sockaddr *) &cur_id->id.route.addr.src_addr;
2218                 if (id_priv->afonly && cur_id->afonly &&
2219                     (addr->sa_family != cur_addr->sa_family))
2220                         continue;
2221
2222                 if (cma_any_addr(addr) || cma_any_addr(cur_addr))
2223                         return -EADDRNOTAVAIL;
2224
2225                 if (!cma_addr_cmp(addr, cur_addr))
2226                         return -EADDRINUSE;
2227         }
2228         return 0;
2229 }
2230
2231 static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv)
2232 {
2233         struct rdma_bind_list *bind_list;
2234         unsigned short snum;
2235         int ret;
2236
2237         snum = ntohs(cma_port((struct sockaddr *) &id_priv->id.route.addr.src_addr));
2238         if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
2239                 return -EACCES;
2240
2241         bind_list = idr_find(ps, snum);
2242         if (!bind_list) {
2243                 ret = cma_alloc_port(ps, id_priv, snum);
2244         } else {
2245                 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
2246                 if (!ret)
2247                         cma_bind_port(bind_list, id_priv);
2248         }
2249         return ret;
2250 }
2251
2252 static int cma_bind_listen(struct rdma_id_private *id_priv)
2253 {
2254         struct rdma_bind_list *bind_list = id_priv->bind_list;
2255         int ret = 0;
2256
2257         mutex_lock(&lock);
2258         if (bind_list->owners.first->next)
2259                 ret = cma_check_port(bind_list, id_priv, 0);
2260         mutex_unlock(&lock);
2261         return ret;
2262 }
2263
2264 static int cma_get_port(struct rdma_id_private *id_priv)
2265 {
2266         struct idr *ps;
2267         int ret;
2268
2269         switch (id_priv->id.ps) {
2270         case RDMA_PS_SDP:
2271                 ps = &sdp_ps;
2272                 break;
2273         case RDMA_PS_TCP:
2274                 ps = &tcp_ps;
2275                 break;
2276         case RDMA_PS_UDP:
2277                 ps = &udp_ps;
2278                 break;
2279         case RDMA_PS_IPOIB:
2280                 ps = &ipoib_ps;
2281                 break;
2282         case RDMA_PS_IB:
2283                 ps = &ib_ps;
2284                 break;
2285         default:
2286                 return -EPROTONOSUPPORT;
2287         }
2288
2289         mutex_lock(&lock);
2290         if (cma_any_port((struct sockaddr *) &id_priv->id.route.addr.src_addr))
2291                 ret = cma_alloc_any_port(ps, id_priv);
2292         else
2293                 ret = cma_use_port(ps, id_priv);
2294         mutex_unlock(&lock);
2295
2296         return ret;
2297 }
2298
2299 static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
2300                                struct sockaddr *addr)
2301 {
2302 #if IS_ENABLED(CONFIG_IPV6)
2303         struct sockaddr_in6 *sin6;
2304
2305         if (addr->sa_family != AF_INET6)
2306                 return 0;
2307
2308         sin6 = (struct sockaddr_in6 *) addr;
2309         if ((ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) &&
2310             !sin6->sin6_scope_id)
2311                         return -EINVAL;
2312
2313         dev_addr->bound_dev_if = sin6->sin6_scope_id;
2314 #endif
2315         return 0;
2316 }
2317
2318 int rdma_listen(struct rdma_cm_id *id, int backlog)
2319 {
2320         struct rdma_id_private *id_priv;
2321         int ret;
2322
2323         id_priv = container_of(id, struct rdma_id_private, id);
2324         if (id_priv->state == RDMA_CM_IDLE) {
2325                 ((struct sockaddr *) &id->route.addr.src_addr)->sa_family = AF_INET;
2326                 ret = rdma_bind_addr(id, (struct sockaddr *) &id->route.addr.src_addr);
2327                 if (ret)
2328                         return ret;
2329         }
2330
2331         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN))
2332                 return -EINVAL;
2333
2334         if (id_priv->reuseaddr) {
2335                 ret = cma_bind_listen(id_priv);
2336                 if (ret)
2337                         goto err;
2338         }
2339
2340         id_priv->backlog = backlog;
2341         if (id->device) {
2342                 switch (rdma_node_get_transport(id->device->node_type)) {
2343                 case RDMA_TRANSPORT_IB:
2344                         ret = cma_ib_listen(id_priv);
2345                         if (ret)
2346                                 goto err;
2347                         break;
2348                 case RDMA_TRANSPORT_IWARP:
2349                         ret = cma_iw_listen(id_priv, backlog);
2350                         if (ret)
2351                                 goto err;
2352                         break;
2353                 default:
2354                         ret = -ENOSYS;
2355                         goto err;
2356                 }
2357         } else
2358                 cma_listen_on_all(id_priv);
2359
2360         return 0;
2361 err:
2362         id_priv->backlog = 0;
2363         cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND);
2364         return ret;
2365 }
2366 EXPORT_SYMBOL(rdma_listen);
2367
2368 int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
2369 {
2370         struct rdma_id_private *id_priv;
2371         int ret;
2372
2373         if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6)
2374                 return -EAFNOSUPPORT;
2375
2376         id_priv = container_of(id, struct rdma_id_private, id);
2377         if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND))
2378                 return -EINVAL;
2379
2380         ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
2381         if (ret)
2382                 goto err1;
2383
2384         if (!cma_any_addr(addr)) {
2385                 ret = rdma_translate_ip(addr, &id->route.addr.dev_addr);
2386                 if (ret)
2387                         goto err1;
2388
2389                 ret = cma_acquire_dev(id_priv);
2390                 if (ret)
2391                         goto err1;
2392         }
2393
2394         memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr));
2395         if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) {
2396                 if (addr->sa_family == AF_INET)
2397                         id_priv->afonly = 1;
2398 #if IS_ENABLED(CONFIG_IPV6)
2399                 else if (addr->sa_family == AF_INET6)
2400                         id_priv->afonly = init_net.ipv6.sysctl.bindv6only;
2401 #endif
2402         }
2403         ret = cma_get_port(id_priv);
2404         if (ret)
2405                 goto err2;
2406
2407         return 0;
2408 err2:
2409         if (id_priv->cma_dev)
2410                 cma_release_dev(id_priv);
2411 err1:
2412         cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE);
2413         return ret;
2414 }
2415 EXPORT_SYMBOL(rdma_bind_addr);
2416
2417 static int cma_format_hdr(void *hdr, enum rdma_port_space ps,
2418                           struct rdma_route *route)
2419 {
2420         struct cma_hdr *cma_hdr;
2421         struct sdp_hh *sdp_hdr;
2422
2423         if (route->addr.src_addr.ss_family == AF_INET) {
2424                 struct sockaddr_in *src4, *dst4;
2425
2426                 src4 = (struct sockaddr_in *) &route->addr.src_addr;
2427                 dst4 = (struct sockaddr_in *) &route->addr.dst_addr;
2428
2429                 switch (ps) {
2430                 case RDMA_PS_SDP:
2431                         sdp_hdr = hdr;
2432                         if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2433                                 return -EINVAL;
2434                         sdp_set_ip_ver(sdp_hdr, 4);
2435                         sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2436                         sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2437                         sdp_hdr->port = src4->sin_port;
2438                         break;
2439                 default:
2440                         cma_hdr = hdr;
2441                         cma_hdr->cma_version = CMA_VERSION;
2442                         cma_set_ip_ver(cma_hdr, 4);
2443                         cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2444                         cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2445                         cma_hdr->port = src4->sin_port;
2446                         break;
2447                 }
2448         } else {
2449                 struct sockaddr_in6 *src6, *dst6;
2450
2451                 src6 = (struct sockaddr_in6 *) &route->addr.src_addr;
2452                 dst6 = (struct sockaddr_in6 *) &route->addr.dst_addr;
2453
2454                 switch (ps) {
2455                 case RDMA_PS_SDP:
2456                         sdp_hdr = hdr;
2457                         if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2458                                 return -EINVAL;
2459                         sdp_set_ip_ver(sdp_hdr, 6);
2460                         sdp_hdr->src_addr.ip6 = src6->sin6_addr;
2461                         sdp_hdr->dst_addr.ip6 = dst6->sin6_addr;
2462                         sdp_hdr->port = src6->sin6_port;
2463                         break;
2464                 default:
2465                         cma_hdr = hdr;
2466                         cma_hdr->cma_version = CMA_VERSION;
2467                         cma_set_ip_ver(cma_hdr, 6);
2468                         cma_hdr->src_addr.ip6 = src6->sin6_addr;
2469                         cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
2470                         cma_hdr->port = src6->sin6_port;
2471                         break;
2472                 }
2473         }
2474         return 0;
2475 }
2476
2477 static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
2478                                 struct ib_cm_event *ib_event)
2479 {
2480         struct rdma_id_private *id_priv = cm_id->context;
2481         struct rdma_cm_event event;
2482         struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
2483         int ret = 0;
2484
2485         if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
2486                 return 0;
2487
2488         memset(&event, 0, sizeof event);
2489         switch (ib_event->event) {
2490         case IB_CM_SIDR_REQ_ERROR:
2491                 event.event = RDMA_CM_EVENT_UNREACHABLE;
2492                 event.status = -ETIMEDOUT;
2493                 break;
2494         case IB_CM_SIDR_REP_RECEIVED:
2495                 event.param.ud.private_data = ib_event->private_data;
2496                 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
2497                 if (rep->status != IB_SIDR_SUCCESS) {
2498                         event.event = RDMA_CM_EVENT_UNREACHABLE;
2499                         event.status = ib_event->param.sidr_rep_rcvd.status;
2500                         break;
2501                 }
2502                 ret = cma_set_qkey(id_priv);
2503                 if (ret) {
2504                         event.event = RDMA_CM_EVENT_ADDR_ERROR;
2505                         event.status = -EINVAL;
2506                         break;
2507                 }
2508                 if (id_priv->qkey != rep->qkey) {
2509                         event.event = RDMA_CM_EVENT_UNREACHABLE;
2510                         event.status = -EINVAL;
2511                         break;
2512                 }
2513                 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
2514                                      id_priv->id.route.path_rec,
2515                                      &event.param.ud.ah_attr);
2516                 event.param.ud.qp_num = rep->qpn;
2517                 event.param.ud.qkey = rep->qkey;
2518                 event.event = RDMA_CM_EVENT_ESTABLISHED;
2519                 event.status = 0;
2520                 break;
2521         default:
2522                 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
2523                        ib_event->event);
2524                 goto out;
2525         }
2526
2527         ret = id_priv->id.event_handler(&id_priv->id, &event);
2528         if (ret) {
2529                 /* Destroy the CM ID by returning a non-zero value. */
2530                 id_priv->cm_id.ib = NULL;
2531                 cma_exch(id_priv, RDMA_CM_DESTROYING);
2532                 mutex_unlock(&id_priv->handler_mutex);
2533                 rdma_destroy_id(&id_priv->id);
2534                 return ret;
2535         }
2536 out:
2537         mutex_unlock(&id_priv->handler_mutex);
2538         return ret;
2539 }
2540
2541 static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
2542                               struct rdma_conn_param *conn_param)
2543 {
2544         struct ib_cm_sidr_req_param req;
2545         struct rdma_route *route;
2546         struct ib_cm_id *id;
2547         int ret;
2548
2549         req.private_data_len = sizeof(struct cma_hdr) +
2550                                conn_param->private_data_len;
2551         if (req.private_data_len < conn_param->private_data_len)
2552                 return -EINVAL;
2553
2554         req.private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2555         if (!req.private_data)
2556                 return -ENOMEM;
2557
2558         if (conn_param->private_data && conn_param->private_data_len)
2559                 memcpy((void *) req.private_data + sizeof(struct cma_hdr),
2560                        conn_param->private_data, conn_param->private_data_len);
2561
2562         route = &id_priv->id.route;
2563         ret = cma_format_hdr((void *) req.private_data, id_priv->id.ps, route);
2564         if (ret)
2565                 goto out;
2566
2567         id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler,
2568                              id_priv);
2569         if (IS_ERR(id)) {
2570                 ret = PTR_ERR(id);
2571                 goto out;
2572         }
2573         id_priv->cm_id.ib = id;
2574
2575         req.path = route->path_rec;
2576         req.service_id = cma_get_service_id(id_priv->id.ps,
2577                                             (struct sockaddr *) &route->addr.dst_addr);
2578         req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
2579         req.max_cm_retries = CMA_MAX_CM_RETRIES;
2580
2581         ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
2582         if (ret) {
2583                 ib_destroy_cm_id(id_priv->cm_id.ib);
2584                 id_priv->cm_id.ib = NULL;
2585         }
2586 out:
2587         kfree(req.private_data);
2588         return ret;
2589 }
2590
2591 static int cma_connect_ib(struct rdma_id_private *id_priv,
2592                           struct rdma_conn_param *conn_param)
2593 {
2594         struct ib_cm_req_param req;
2595         struct rdma_route *route;
2596         void *private_data;
2597         struct ib_cm_id *id;
2598         int offset, ret;
2599
2600         memset(&req, 0, sizeof req);
2601         offset = cma_user_data_offset(id_priv->id.ps);
2602         req.private_data_len = offset + conn_param->private_data_len;
2603         if (req.private_data_len < conn_param->private_data_len)
2604                 return -EINVAL;
2605
2606         private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2607         if (!private_data)
2608                 return -ENOMEM;
2609
2610         if (conn_param->private_data && conn_param->private_data_len)
2611                 memcpy(private_data + offset, conn_param->private_data,
2612                        conn_param->private_data_len);
2613
2614         id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv);
2615         if (IS_ERR(id)) {
2616                 ret = PTR_ERR(id);
2617                 goto out;
2618         }
2619         id_priv->cm_id.ib = id;
2620
2621         route = &id_priv->id.route;
2622         ret = cma_format_hdr(private_data, id_priv->id.ps, route);
2623         if (ret)
2624                 goto out;
2625         req.private_data = private_data;
2626
2627         req.primary_path = &route->path_rec[0];
2628         if (route->num_paths == 2)
2629                 req.alternate_path = &route->path_rec[1];
2630
2631         req.service_id = cma_get_service_id(id_priv->id.ps,
2632                                             (struct sockaddr *) &route->addr.dst_addr);
2633         req.qp_num = id_priv->qp_num;
2634         req.qp_type = id_priv->id.qp_type;
2635         req.starting_psn = id_priv->seq_num;
2636         req.responder_resources = conn_param->responder_resources;
2637         req.initiator_depth = conn_param->initiator_depth;
2638         req.flow_control = conn_param->flow_control;
2639         req.retry_count = min_t(u8, 7, conn_param->retry_count);
2640         req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
2641         req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2642         req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2643         req.max_cm_retries = CMA_MAX_CM_RETRIES;
2644         req.srq = id_priv->srq ? 1 : 0;
2645
2646         ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
2647 out:
2648         if (ret && !IS_ERR(id)) {
2649                 ib_destroy_cm_id(id);
2650                 id_priv->cm_id.ib = NULL;
2651         }
2652
2653         kfree(private_data);
2654         return ret;
2655 }
2656
2657 static int cma_connect_iw(struct rdma_id_private *id_priv,
2658                           struct rdma_conn_param *conn_param)
2659 {
2660         struct iw_cm_id *cm_id;
2661         struct sockaddr_in* sin;
2662         int ret;
2663         struct iw_cm_conn_param iw_param;
2664
2665         cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
2666         if (IS_ERR(cm_id))
2667                 return PTR_ERR(cm_id);
2668
2669         id_priv->cm_id.iw = cm_id;
2670
2671         sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr;
2672         cm_id->local_addr = *sin;
2673
2674         sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr;
2675         cm_id->remote_addr = *sin;
2676
2677         ret = cma_modify_qp_rtr(id_priv, conn_param);
2678         if (ret)
2679                 goto out;
2680
2681         if (conn_param) {
2682                 iw_param.ord = conn_param->initiator_depth;
2683                 iw_param.ird = conn_param->responder_resources;
2684                 iw_param.private_data = conn_param->private_data;
2685                 iw_param.private_data_len = conn_param->private_data_len;
2686                 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num;
2687         } else {
2688                 memset(&iw_param, 0, sizeof iw_param);
2689                 iw_param.qpn = id_priv->qp_num;
2690         }
2691         ret = iw_cm_connect(cm_id, &iw_param);
2692 out:
2693         if (ret) {
2694                 iw_destroy_cm_id(cm_id);
2695                 id_priv->cm_id.iw = NULL;
2696         }
2697         return ret;
2698 }
2699
2700 int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2701 {
2702         struct rdma_id_private *id_priv;
2703         int ret;
2704
2705         id_priv = container_of(id, struct rdma_id_private, id);
2706         if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT))
2707                 return -EINVAL;
2708
2709         if (!id->qp) {
2710                 id_priv->qp_num = conn_param->qp_num;
2711                 id_priv->srq = conn_param->srq;
2712         }
2713
2714         switch (rdma_node_get_transport(id->device->node_type)) {
2715         case RDMA_TRANSPORT_IB:
2716                 if (id->qp_type == IB_QPT_UD)
2717                         ret = cma_resolve_ib_udp(id_priv, conn_param);
2718                 else
2719                         ret = cma_connect_ib(id_priv, conn_param);
2720                 break;
2721         case RDMA_TRANSPORT_IWARP:
2722                 ret = cma_connect_iw(id_priv, conn_param);
2723                 break;
2724         default:
2725                 ret = -ENOSYS;
2726                 break;
2727         }
2728         if (ret)
2729                 goto err;
2730
2731         return 0;
2732 err:
2733         cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED);
2734         return ret;
2735 }
2736 EXPORT_SYMBOL(rdma_connect);
2737
2738 static int cma_accept_ib(struct rdma_id_private *id_priv,
2739                          struct rdma_conn_param *conn_param)
2740 {
2741         struct ib_cm_rep_param rep;
2742         int ret;
2743
2744         ret = cma_modify_qp_rtr(id_priv, conn_param);
2745         if (ret)
2746                 goto out;
2747
2748         ret = cma_modify_qp_rts(id_priv, conn_param);
2749         if (ret)
2750                 goto out;
2751
2752         memset(&rep, 0, sizeof rep);
2753         rep.qp_num = id_priv->qp_num;
2754         rep.starting_psn = id_priv->seq_num;
2755         rep.private_data = conn_param->private_data;
2756         rep.private_data_len = conn_param->private_data_len;
2757         rep.responder_resources = conn_param->responder_resources;
2758         rep.initiator_depth = conn_param->initiator_depth;
2759         rep.failover_accepted = 0;
2760         rep.flow_control = conn_param->flow_control;
2761         rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
2762         rep.srq = id_priv->srq ? 1 : 0;
2763
2764         ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
2765 out:
2766         return ret;
2767 }
2768
2769 static int cma_accept_iw(struct rdma_id_private *id_priv,
2770                   struct rdma_conn_param *conn_param)
2771 {
2772         struct iw_cm_conn_param iw_param;
2773         int ret;
2774
2775         ret = cma_modify_qp_rtr(id_priv, conn_param);
2776         if (ret)
2777                 return ret;
2778
2779         iw_param.ord = conn_param->initiator_depth;
2780         iw_param.ird = conn_param->responder_resources;
2781         iw_param.private_data = conn_param->private_data;
2782         iw_param.private_data_len = conn_param->private_data_len;
2783         if (id_priv->id.qp) {
2784                 iw_param.qpn = id_priv->qp_num;
2785         } else
2786                 iw_param.qpn = conn_param->qp_num;
2787
2788         return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
2789 }
2790
2791 static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
2792                              enum ib_cm_sidr_status status,
2793                              const void *private_data, int private_data_len)
2794 {
2795         struct ib_cm_sidr_rep_param rep;
2796         int ret;
2797
2798         memset(&rep, 0, sizeof rep);
2799         rep.status = status;
2800         if (status == IB_SIDR_SUCCESS) {
2801                 ret = cma_set_qkey(id_priv);
2802                 if (ret)
2803                         return ret;
2804                 rep.qp_num = id_priv->qp_num;
2805                 rep.qkey = id_priv->qkey;
2806         }
2807         rep.private_data = private_data;
2808         rep.private_data_len = private_data_len;
2809
2810         return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
2811 }
2812
2813 int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2814 {
2815         struct rdma_id_private *id_priv;
2816         int ret;
2817
2818         id_priv = container_of(id, struct rdma_id_private, id);
2819
2820         id_priv->owner = task_pid_nr(current);
2821
2822         if (!cma_comp(id_priv, RDMA_CM_CONNECT))
2823                 return -EINVAL;
2824
2825         if (!id->qp && conn_param) {
2826                 id_priv->qp_num = conn_param->qp_num;
2827                 id_priv->srq = conn_param->srq;
2828         }
2829
2830         switch (rdma_node_get_transport(id->device->node_type)) {
2831         case RDMA_TRANSPORT_IB:
2832                 if (id->qp_type == IB_QPT_UD) {
2833                         if (conn_param)
2834                                 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
2835                                                         conn_param->private_data,
2836                                                         conn_param->private_data_len);
2837                         else
2838                                 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
2839                                                         NULL, 0);
2840                 } else {
2841                         if (conn_param)
2842                                 ret = cma_accept_ib(id_priv, conn_param);
2843                         else
2844                                 ret = cma_rep_recv(id_priv);
2845                 }
2846                 break;
2847         case RDMA_TRANSPORT_IWARP:
2848                 ret = cma_accept_iw(id_priv, conn_param);
2849                 break;
2850         default:
2851                 ret = -ENOSYS;
2852                 break;
2853         }
2854
2855         if (ret)
2856                 goto reject;
2857
2858         return 0;
2859 reject:
2860         cma_modify_qp_err(id_priv);
2861         rdma_reject(id, NULL, 0);
2862         return ret;
2863 }
2864 EXPORT_SYMBOL(rdma_accept);
2865
2866 int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
2867 {
2868         struct rdma_id_private *id_priv;
2869         int ret;
2870
2871         id_priv = container_of(id, struct rdma_id_private, id);
2872         if (!id_priv->cm_id.ib)
2873                 return -EINVAL;
2874
2875         switch (id->device->node_type) {
2876         case RDMA_NODE_IB_CA:
2877                 ret = ib_cm_notify(id_priv->cm_id.ib, event);
2878                 break;
2879         default:
2880                 ret = 0;
2881                 break;
2882         }
2883         return ret;
2884 }
2885 EXPORT_SYMBOL(rdma_notify);
2886
2887 int rdma_reject(struct rdma_cm_id *id, const void *private_data,
2888                 u8 private_data_len)
2889 {
2890         struct rdma_id_private *id_priv;
2891         int ret;
2892
2893         id_priv = container_of(id, struct rdma_id_private, id);
2894         if (!id_priv->cm_id.ib)
2895                 return -EINVAL;
2896
2897         switch (rdma_node_get_transport(id->device->node_type)) {
2898         case RDMA_TRANSPORT_IB:
2899                 if (id->qp_type == IB_QPT_UD)
2900                         ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT,
2901                                                 private_data, private_data_len);
2902                 else
2903                         ret = ib_send_cm_rej(id_priv->cm_id.ib,
2904                                              IB_CM_REJ_CONSUMER_DEFINED, NULL,
2905                                              0, private_data, private_data_len);
2906                 break;
2907         case RDMA_TRANSPORT_IWARP:
2908                 ret = iw_cm_reject(id_priv->cm_id.iw,
2909                                    private_data, private_data_len);
2910                 break;
2911         default:
2912                 ret = -ENOSYS;
2913                 break;
2914         }
2915         return ret;
2916 }
2917 EXPORT_SYMBOL(rdma_reject);
2918
2919 int rdma_disconnect(struct rdma_cm_id *id)
2920 {
2921         struct rdma_id_private *id_priv;
2922         int ret;
2923
2924         id_priv = container_of(id, struct rdma_id_private, id);
2925         if (!id_priv->cm_id.ib)
2926                 return -EINVAL;
2927
2928         switch (rdma_node_get_transport(id->device->node_type)) {
2929         case RDMA_TRANSPORT_IB:
2930                 ret = cma_modify_qp_err(id_priv);
2931                 if (ret)
2932                         goto out;
2933                 /* Initiate or respond to a disconnect. */
2934                 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
2935                         ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
2936                 break;
2937         case RDMA_TRANSPORT_IWARP:
2938                 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
2939                 break;
2940         default:
2941                 ret = -EINVAL;
2942                 break;
2943         }
2944 out:
2945         return ret;
2946 }
2947 EXPORT_SYMBOL(rdma_disconnect);
2948
2949 static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
2950 {
2951         struct rdma_id_private *id_priv;
2952         struct cma_multicast *mc = multicast->context;
2953         struct rdma_cm_event event;
2954         int ret;
2955
2956         id_priv = mc->id_priv;
2957         if (cma_disable_callback(id_priv, RDMA_CM_ADDR_BOUND) &&
2958             cma_disable_callback(id_priv, RDMA_CM_ADDR_RESOLVED))
2959                 return 0;
2960
2961         mutex_lock(&id_priv->qp_mutex);
2962         if (!status && id_priv->id.qp)
2963                 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
2964                                          be16_to_cpu(multicast->rec.mlid));
2965         mutex_unlock(&id_priv->qp_mutex);
2966
2967         memset(&event, 0, sizeof event);
2968         event.status = status;
2969         event.param.ud.private_data = mc->context;
2970         if (!status) {
2971                 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
2972                 ib_init_ah_from_mcmember(id_priv->id.device,
2973                                          id_priv->id.port_num, &multicast->rec,
2974                                          &event.param.ud.ah_attr);
2975                 event.param.ud.qp_num = 0xFFFFFF;
2976                 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
2977         } else
2978                 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
2979
2980         ret = id_priv->id.event_handler(&id_priv->id, &event);
2981         if (ret) {
2982                 cma_exch(id_priv, RDMA_CM_DESTROYING);
2983                 mutex_unlock(&id_priv->handler_mutex);
2984                 rdma_destroy_id(&id_priv->id);
2985                 return 0;
2986         }
2987
2988         mutex_unlock(&id_priv->handler_mutex);
2989         return 0;
2990 }
2991
2992 static void cma_set_mgid(struct rdma_id_private *id_priv,
2993                          struct sockaddr *addr, union ib_gid *mgid)
2994 {
2995         unsigned char mc_map[MAX_ADDR_LEN];
2996         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2997         struct sockaddr_in *sin = (struct sockaddr_in *) addr;
2998         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
2999
3000         if (cma_any_addr(addr)) {
3001                 memset(mgid, 0, sizeof *mgid);
3002         } else if ((addr->sa_family == AF_INET6) &&
3003                    ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
3004                                                                  0xFF10A01B)) {
3005                 /* IPv6 address is an SA assigned MGID. */
3006                 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3007         } else if ((addr->sa_family == AF_INET6)) {
3008                 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
3009                 if (id_priv->id.ps == RDMA_PS_UDP)
3010                         mc_map[7] = 0x01;       /* Use RDMA CM signature */
3011                 *mgid = *(union ib_gid *) (mc_map + 4);
3012         } else {
3013                 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
3014                 if (id_priv->id.ps == RDMA_PS_UDP)
3015                         mc_map[7] = 0x01;       /* Use RDMA CM signature */
3016                 *mgid = *(union ib_gid *) (mc_map + 4);
3017         }
3018 }
3019
3020 static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
3021                                  struct cma_multicast *mc)
3022 {
3023         struct ib_sa_mcmember_rec rec;
3024         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3025         ib_sa_comp_mask comp_mask;
3026         int ret;
3027
3028         ib_addr_get_mgid(dev_addr, &rec.mgid);
3029         ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
3030                                      &rec.mgid, &rec);
3031         if (ret)
3032                 return ret;
3033
3034         cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
3035         if (id_priv->id.ps == RDMA_PS_UDP)
3036                 rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
3037         rdma_addr_get_sgid(dev_addr, &rec.port_gid);
3038         rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
3039         rec.join_state = 1;
3040
3041         comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
3042                     IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
3043                     IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
3044                     IB_SA_MCMEMBER_REC_FLOW_LABEL |
3045                     IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
3046
3047         if (id_priv->id.ps == RDMA_PS_IPOIB)
3048                 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
3049                              IB_SA_MCMEMBER_REC_RATE_SELECTOR |
3050                              IB_SA_MCMEMBER_REC_MTU_SELECTOR |
3051                              IB_SA_MCMEMBER_REC_MTU |
3052                              IB_SA_MCMEMBER_REC_HOP_LIMIT;
3053
3054         mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
3055                                                 id_priv->id.port_num, &rec,
3056                                                 comp_mask, GFP_KERNEL,
3057                                                 cma_ib_mc_handler, mc);
3058         return PTR_RET(mc->multicast.ib);
3059 }
3060
3061 static void iboe_mcast_work_handler(struct work_struct *work)
3062 {
3063         struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
3064         struct cma_multicast *mc = mw->mc;
3065         struct ib_sa_multicast *m = mc->multicast.ib;
3066
3067         mc->multicast.ib->context = mc;
3068         cma_ib_mc_handler(0, m);
3069         kref_put(&mc->mcref, release_mc);
3070         kfree(mw);
3071 }
3072
3073 static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid)
3074 {
3075         struct sockaddr_in *sin = (struct sockaddr_in *)addr;
3076         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
3077
3078         if (cma_any_addr(addr)) {
3079                 memset(mgid, 0, sizeof *mgid);
3080         } else if (addr->sa_family == AF_INET6) {
3081                 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3082         } else {
3083                 mgid->raw[0] = 0xff;
3084                 mgid->raw[1] = 0x0e;
3085                 mgid->raw[2] = 0;
3086                 mgid->raw[3] = 0;
3087                 mgid->raw[4] = 0;
3088                 mgid->raw[5] = 0;
3089                 mgid->raw[6] = 0;
3090                 mgid->raw[7] = 0;
3091                 mgid->raw[8] = 0;
3092                 mgid->raw[9] = 0;
3093                 mgid->raw[10] = 0xff;
3094                 mgid->raw[11] = 0xff;
3095                 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
3096         }
3097 }
3098
3099 static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
3100                                    struct cma_multicast *mc)
3101 {
3102         struct iboe_mcast_work *work;
3103         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3104         int err;
3105         struct sockaddr *addr = (struct sockaddr *)&mc->addr;
3106         struct net_device *ndev = NULL;
3107
3108         if (cma_zero_addr((struct sockaddr *)&mc->addr))
3109                 return -EINVAL;
3110
3111         work = kzalloc(sizeof *work, GFP_KERNEL);
3112         if (!work)
3113                 return -ENOMEM;
3114
3115         mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
3116         if (!mc->multicast.ib) {
3117                 err = -ENOMEM;
3118                 goto out1;
3119         }
3120
3121         cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid);
3122
3123         mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
3124         if (id_priv->id.ps == RDMA_PS_UDP)
3125                 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
3126
3127         if (dev_addr->bound_dev_if)
3128                 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
3129         if (!ndev) {
3130                 err = -ENODEV;
3131                 goto out2;
3132         }
3133         mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
3134         mc->multicast.ib->rec.hop_limit = 1;
3135         mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu);
3136         dev_put(ndev);
3137         if (!mc->multicast.ib->rec.mtu) {
3138                 err = -EINVAL;
3139                 goto out2;
3140         }
3141         iboe_addr_get_sgid(dev_addr, &mc->multicast.ib->rec.port_gid);
3142         work->id = id_priv;
3143         work->mc = mc;
3144         INIT_WORK(&work->work, iboe_mcast_work_handler);
3145         kref_get(&mc->mcref);
3146         queue_work(cma_wq, &work->work);
3147
3148         return 0;
3149
3150 out2:
3151         kfree(mc->multicast.ib);
3152 out1:
3153         kfree(work);
3154         return err;
3155 }
3156
3157 int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
3158                         void *context)
3159 {
3160         struct rdma_id_private *id_priv;
3161         struct cma_multicast *mc;
3162         int ret;
3163
3164         id_priv = container_of(id, struct rdma_id_private, id);
3165         if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) &&
3166             !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED))
3167                 return -EINVAL;
3168
3169         mc = kmalloc(sizeof *mc, GFP_KERNEL);
3170         if (!mc)
3171                 return -ENOMEM;
3172
3173         memcpy(&mc->addr, addr, ip_addr_size(addr));
3174         mc->context = context;
3175         mc->id_priv = id_priv;
3176
3177         spin_lock(&id_priv->lock);
3178         list_add(&mc->list, &id_priv->mc_list);
3179         spin_unlock(&id_priv->lock);
3180
3181         switch (rdma_node_get_transport(id->device->node_type)) {
3182         case RDMA_TRANSPORT_IB:
3183                 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
3184                 case IB_LINK_LAYER_INFINIBAND:
3185                         ret = cma_join_ib_multicast(id_priv, mc);
3186                         break;
3187                 case IB_LINK_LAYER_ETHERNET:
3188                         kref_init(&mc->mcref);
3189                         ret = cma_iboe_join_multicast(id_priv, mc);
3190                         break;
3191                 default:
3192                         ret = -EINVAL;
3193                 }
3194                 break;
3195         default:
3196                 ret = -ENOSYS;
3197                 break;
3198         }
3199
3200         if (ret) {
3201                 spin_lock_irq(&id_priv->lock);
3202                 list_del(&mc->list);
3203                 spin_unlock_irq(&id_priv->lock);
3204                 kfree(mc);
3205         }
3206         return ret;
3207 }
3208 EXPORT_SYMBOL(rdma_join_multicast);
3209
3210 void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
3211 {
3212         struct rdma_id_private *id_priv;
3213         struct cma_multicast *mc;
3214
3215         id_priv = container_of(id, struct rdma_id_private, id);
3216         spin_lock_irq(&id_priv->lock);
3217         list_for_each_entry(mc, &id_priv->mc_list, list) {
3218                 if (!memcmp(&mc->addr, addr, ip_addr_size(addr))) {
3219                         list_del(&mc->list);
3220                         spin_unlock_irq(&id_priv->lock);
3221
3222                         if (id->qp)
3223                                 ib_detach_mcast(id->qp,
3224                                                 &mc->multicast.ib->rec.mgid,
3225                                                 be16_to_cpu(mc->multicast.ib->rec.mlid));
3226                         if (rdma_node_get_transport(id_priv->cma_dev->device->node_type) == RDMA_TRANSPORT_IB) {
3227                                 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
3228                                 case IB_LINK_LAYER_INFINIBAND:
3229                                         ib_sa_free_multicast(mc->multicast.ib);
3230                                         kfree(mc);
3231                                         break;
3232                                 case IB_LINK_LAYER_ETHERNET:
3233                                         kref_put(&mc->mcref, release_mc);
3234                                         break;
3235                                 default:
3236                                         break;
3237                                 }
3238                         }
3239                         return;
3240                 }
3241         }
3242         spin_unlock_irq(&id_priv->lock);
3243 }
3244 EXPORT_SYMBOL(rdma_leave_multicast);
3245
3246 static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
3247 {
3248         struct rdma_dev_addr *dev_addr;
3249         struct cma_ndev_work *work;
3250
3251         dev_addr = &id_priv->id.route.addr.dev_addr;
3252
3253         if ((dev_addr->bound_dev_if == ndev->ifindex) &&
3254             memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
3255                 printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n",
3256                        ndev->name, &id_priv->id);
3257                 work = kzalloc(sizeof *work, GFP_KERNEL);
3258                 if (!work)
3259                         return -ENOMEM;
3260
3261                 INIT_WORK(&work->work, cma_ndev_work_handler);
3262                 work->id = id_priv;
3263                 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
3264                 atomic_inc(&id_priv->refcount);
3265                 queue_work(cma_wq, &work->work);
3266         }
3267
3268         return 0;
3269 }
3270
3271 static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
3272                                void *ctx)
3273 {
3274         struct net_device *ndev = (struct net_device *)ctx;
3275         struct cma_device *cma_dev;
3276         struct rdma_id_private *id_priv;
3277         int ret = NOTIFY_DONE;
3278
3279         if (dev_net(ndev) != &init_net)
3280                 return NOTIFY_DONE;
3281
3282         if (event != NETDEV_BONDING_FAILOVER)
3283                 return NOTIFY_DONE;
3284
3285         if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING))
3286                 return NOTIFY_DONE;
3287
3288         mutex_lock(&lock);
3289         list_for_each_entry(cma_dev, &dev_list, list)
3290                 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3291                         ret = cma_netdev_change(ndev, id_priv);
3292                         if (ret)
3293                                 goto out;
3294                 }
3295
3296 out:
3297         mutex_unlock(&lock);
3298         return ret;
3299 }
3300
3301 static struct notifier_block cma_nb = {
3302         .notifier_call = cma_netdev_callback
3303 };
3304
3305 static void cma_add_one(struct ib_device *device)
3306 {
3307         struct cma_device *cma_dev;
3308         struct rdma_id_private *id_priv;
3309
3310         cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
3311         if (!cma_dev)
3312                 return;
3313
3314         cma_dev->device = device;
3315
3316         init_completion(&cma_dev->comp);
3317         atomic_set(&cma_dev->refcount, 1);
3318         INIT_LIST_HEAD(&cma_dev->id_list);
3319         ib_set_client_data(device, &cma_client, cma_dev);
3320
3321         mutex_lock(&lock);
3322         list_add_tail(&cma_dev->list, &dev_list);
3323         list_for_each_entry(id_priv, &listen_any_list, list)
3324                 cma_listen_on_dev(id_priv, cma_dev);
3325         mutex_unlock(&lock);
3326 }
3327
3328 static int cma_remove_id_dev(struct rdma_id_private *id_priv)
3329 {
3330         struct rdma_cm_event event;
3331         enum rdma_cm_state state;
3332         int ret = 0;
3333
3334         /* Record that we want to remove the device */
3335         state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL);
3336         if (state == RDMA_CM_DESTROYING)
3337                 return 0;
3338
3339         cma_cancel_operation(id_priv, state);
3340         mutex_lock(&id_priv->handler_mutex);
3341
3342         /* Check for destruction from another callback. */
3343         if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL))
3344                 goto out;
3345
3346         memset(&event, 0, sizeof event);
3347         event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
3348         ret = id_priv->id.event_handler(&id_priv->id, &event);
3349 out:
3350         mutex_unlock(&id_priv->handler_mutex);
3351         return ret;
3352 }
3353
3354 static void cma_process_remove(struct cma_device *cma_dev)
3355 {
3356         struct rdma_id_private *id_priv;
3357         int ret;
3358
3359         mutex_lock(&lock);
3360         while (!list_empty(&cma_dev->id_list)) {
3361                 id_priv = list_entry(cma_dev->id_list.next,
3362                                      struct rdma_id_private, list);
3363
3364                 list_del(&id_priv->listen_list);
3365                 list_del_init(&id_priv->list);
3366                 atomic_inc(&id_priv->refcount);
3367                 mutex_unlock(&lock);
3368
3369                 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
3370                 cma_deref_id(id_priv);
3371                 if (ret)
3372                         rdma_destroy_id(&id_priv->id);
3373
3374                 mutex_lock(&lock);
3375         }
3376         mutex_unlock(&lock);
3377
3378         cma_deref_dev(cma_dev);
3379         wait_for_completion(&cma_dev->comp);
3380 }
3381
3382 static void cma_remove_one(struct ib_device *device)
3383 {
3384         struct cma_device *cma_dev;
3385
3386         cma_dev = ib_get_client_data(device, &cma_client);
3387         if (!cma_dev)
3388                 return;
3389
3390         mutex_lock(&lock);
3391         list_del(&cma_dev->list);
3392         mutex_unlock(&lock);
3393
3394         cma_process_remove(cma_dev);
3395         kfree(cma_dev);
3396 }
3397
3398 static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb)
3399 {
3400         struct nlmsghdr *nlh;
3401         struct rdma_cm_id_stats *id_stats;
3402         struct rdma_id_private *id_priv;
3403         struct rdma_cm_id *id = NULL;
3404         struct cma_device *cma_dev;
3405         int i_dev = 0, i_id = 0;
3406
3407         /*
3408          * We export all of the IDs as a sequence of messages.  Each
3409          * ID gets its own netlink message.
3410          */
3411         mutex_lock(&lock);
3412
3413         list_for_each_entry(cma_dev, &dev_list, list) {
3414                 if (i_dev < cb->args[0]) {
3415                         i_dev++;
3416                         continue;
3417                 }
3418
3419                 i_id = 0;
3420                 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3421                         if (i_id < cb->args[1]) {
3422                                 i_id++;
3423                                 continue;
3424                         }
3425
3426                         id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq,
3427                                                 sizeof *id_stats, RDMA_NL_RDMA_CM,
3428                                                 RDMA_NL_RDMA_CM_ID_STATS);
3429                         if (!id_stats)
3430                                 goto out;
3431
3432                         memset(id_stats, 0, sizeof *id_stats);
3433                         id = &id_priv->id;
3434                         id_stats->node_type = id->route.addr.dev_addr.dev_type;
3435                         id_stats->port_num = id->port_num;
3436                         id_stats->bound_dev_if =
3437                                 id->route.addr.dev_addr.bound_dev_if;
3438
3439                         if (id->route.addr.src_addr.ss_family == AF_INET) {
3440                                 if (ibnl_put_attr(skb, nlh,
3441                                                   sizeof(struct sockaddr_in),
3442                                                   &id->route.addr.src_addr,
3443                                                   RDMA_NL_RDMA_CM_ATTR_SRC_ADDR)) {
3444                                         goto out;
3445                                 }
3446                                 if (ibnl_put_attr(skb, nlh,
3447                                                   sizeof(struct sockaddr_in),
3448                                                   &id->route.addr.dst_addr,
3449                                                   RDMA_NL_RDMA_CM_ATTR_DST_ADDR)) {
3450                                         goto out;
3451                                 }
3452                         } else if (id->route.addr.src_addr.ss_family == AF_INET6) {
3453                                 if (ibnl_put_attr(skb, nlh,
3454                                                   sizeof(struct sockaddr_in6),
3455                                                   &id->route.addr.src_addr,
3456                                                   RDMA_NL_RDMA_CM_ATTR_SRC_ADDR)) {
3457                                         goto out;
3458                                 }
3459                                 if (ibnl_put_attr(skb, nlh,
3460                                                   sizeof(struct sockaddr_in6),
3461                                                   &id->route.addr.dst_addr,
3462                                                   RDMA_NL_RDMA_CM_ATTR_DST_ADDR)) {
3463                                         goto out;
3464                                 }
3465                         }
3466
3467                         id_stats->pid           = id_priv->owner;
3468                         id_stats->port_space    = id->ps;
3469                         id_stats->cm_state      = id_priv->state;
3470                         id_stats->qp_num        = id_priv->qp_num;
3471                         id_stats->qp_type       = id->qp_type;
3472
3473                         i_id++;
3474                 }
3475
3476                 cb->args[1] = 0;
3477                 i_dev++;
3478         }
3479
3480 out:
3481         mutex_unlock(&lock);
3482         cb->args[0] = i_dev;
3483         cb->args[1] = i_id;
3484
3485         return skb->len;
3486 }
3487
3488 static const struct ibnl_client_cbs cma_cb_table[] = {
3489         [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats,
3490                                        .module = THIS_MODULE },
3491 };
3492
3493 static int __init cma_init(void)
3494 {
3495         int ret;
3496
3497         cma_wq = create_singlethread_workqueue("rdma_cm");
3498         if (!cma_wq)
3499                 return -ENOMEM;
3500
3501         ib_sa_register_client(&sa_client);
3502         rdma_addr_register_client(&addr_client);
3503         register_netdevice_notifier(&cma_nb);
3504
3505         ret = ib_register_client(&cma_client);
3506         if (ret)
3507                 goto err;
3508
3509         if (ibnl_add_client(RDMA_NL_RDMA_CM, RDMA_NL_RDMA_CM_NUM_OPS, cma_cb_table))
3510                 printk(KERN_WARNING "RDMA CMA: failed to add netlink callback\n");
3511
3512         return 0;
3513
3514 err:
3515         unregister_netdevice_notifier(&cma_nb);
3516         rdma_addr_unregister_client(&addr_client);
3517         ib_sa_unregister_client(&sa_client);
3518         destroy_workqueue(cma_wq);
3519         return ret;
3520 }
3521
3522 static void __exit cma_cleanup(void)
3523 {
3524         ibnl_remove_client(RDMA_NL_RDMA_CM);
3525         ib_unregister_client(&cma_client);
3526         unregister_netdevice_notifier(&cma_nb);
3527         rdma_addr_unregister_client(&addr_client);
3528         ib_sa_unregister_client(&sa_client);
3529         destroy_workqueue(cma_wq);
3530         idr_destroy(&sdp_ps);
3531         idr_destroy(&tcp_ps);
3532         idr_destroy(&udp_ps);
3533         idr_destroy(&ipoib_ps);
3534         idr_destroy(&ib_ps);
3535 }
3536
3537 module_init(cma_init);
3538 module_exit(cma_cleanup);