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/igmp.h>
  42 #include <linux/idr.h>
  43 #include <linux/inetdevice.h>
  44 #include <linux/slab.h>
  45 #include <linux/module.h>
  46 #include <net/route.h>
  47
  48 #include <net/net_namespace.h>
  49 #include <net/netns/generic.h>
  50 #include <net/tcp.h>
  51 #include <net/ipv6.h>
  52 #include <net/ip_fib.h>
  53 #include <net/ip6_route.h>
  54
  55 #include <rdma/rdma_cm.h>
  56 #include <rdma/rdma_cm_ib.h>
  57 #include <rdma/rdma_netlink.h>
  58 #include <rdma/ib.h>
  59 #include <rdma/ib_cache.h>
  60 #include <rdma/ib_cm.h>
  61 #include <rdma/ib_sa.h>
  62 #include <rdma/iw_cm.h>
  63
  64 #include "core_priv.h"
  65
  66 MODULE_AUTHOR("Sean Hefty");
  67 MODULE_DESCRIPTION("Generic RDMA CM Agent");
  68 MODULE_LICENSE("Dual BSD/GPL");
  69
  70 #define CMA_CM_RESPONSE_TIMEOUT 20
  71 #define CMA_MAX_CM_RETRIES 15
  72 #define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
  73 #define CMA_IBOE_PACKET_LIFETIME 18
  74
  75 static const char * const cma_events[] = {
  76         [RDMA_CM_EVENT_ADDR_RESOLVED]    = "address resolved",
  77         [RDMA_CM_EVENT_ADDR_ERROR]       = "address error",
  78         [RDMA_CM_EVENT_ROUTE_RESOLVED]   = "route resolved ",
  79         [RDMA_CM_EVENT_ROUTE_ERROR]      = "route error",
  80         [RDMA_CM_EVENT_CONNECT_REQUEST]  = "connect request",
  81         [RDMA_CM_EVENT_CONNECT_RESPONSE] = "connect response",
  82         [RDMA_CM_EVENT_CONNECT_ERROR]    = "connect error",
  83         [RDMA_CM_EVENT_UNREACHABLE]      = "unreachable",
  84         [RDMA_CM_EVENT_REJECTED]         = "rejected",
  85         [RDMA_CM_EVENT_ESTABLISHED]      = "established",
  86         [RDMA_CM_EVENT_DISCONNECTED]     = "disconnected",
  87         [RDMA_CM_EVENT_DEVICE_REMOVAL]   = "device removal",
  88         [RDMA_CM_EVENT_MULTICAST_JOIN]   = "multicast join",
  89         [RDMA_CM_EVENT_MULTICAST_ERROR]  = "multicast error",
  90         [RDMA_CM_EVENT_ADDR_CHANGE]      = "address change",
  91         [RDMA_CM_EVENT_TIMEWAIT_EXIT]    = "timewait exit",
  92 };
  93
  94 const char *__attribute_const__ rdma_event_msg(enum rdma_cm_event_type event)
  95 {
  96         size_t index = event;
  97
  98         return (index < ARRAY_SIZE(cma_events) && cma_events[index]) ?
  99                         cma_events[index] : "unrecognized event";
 100 }
 101 EXPORT_SYMBOL(rdma_event_msg);
 102
 103 static void cma_add_one(struct ib_device *device);
 104 static void cma_remove_one(struct ib_device *device, void *client_data);
 105
 106 static struct ib_client cma_client = {
 107         .name   = "cma",
 108         .add    = cma_add_one,
 109         .remove = cma_remove_one
 110 };
 111
 112 static struct ib_sa_client sa_client;
 113 static struct rdma_addr_client addr_client;
 114 static LIST_HEAD(dev_list);
 115 static LIST_HEAD(listen_any_list);
 116 static DEFINE_MUTEX(lock);
 117 static struct workqueue_struct *cma_wq;
 118 static int cma_pernet_id;
 119
 120 struct cma_pernet {
 121         struct idr tcp_ps;
 122         struct idr udp_ps;
 123         struct idr ipoib_ps;
 124         struct idr ib_ps;
 125 };
 126
 127 static struct cma_pernet *cma_pernet(struct net *net)
 128 {
 129         return net_generic(net, cma_pernet_id);
 130 }
 131
 132 static struct idr *cma_pernet_idr(struct net *net, enum rdma_port_space ps)
 133 {
 134         struct cma_pernet *pernet = cma_pernet(net);
 135
 136         switch (ps) {
 137         case RDMA_PS_TCP:
 138                 return &pernet->tcp_ps;
 139         case RDMA_PS_UDP:
 140                 return &pernet->udp_ps;
 141         case RDMA_PS_IPOIB:
 142                 return &pernet->ipoib_ps;
 143         case RDMA_PS_IB:
 144                 return &pernet->ib_ps;
 145         default:
 146                 return NULL;
 147         }
 148 }
 149
 150 struct cma_device {
 151         struct list_head        list;
 152         struct ib_device        *device;
 153         struct completion       comp;
 154         atomic_t                refcount;
 155         struct list_head        id_list;
 156         enum ib_gid_type        *default_gid_type;
 157 };
 158
 159 struct rdma_bind_list {
 160         enum rdma_port_space    ps;
 161         struct hlist_head       owners;
 162         unsigned short          port;
 163 };
 164
 165 static int cma_ps_alloc(struct net *net, enum rdma_port_space ps,
 166                         struct rdma_bind_list *bind_list, int snum)
 167 {
 168         struct idr *idr = cma_pernet_idr(net, ps);
 169
 170         return idr_alloc(idr, bind_list, snum, snum + 1, GFP_KERNEL);
 171 }
 172
 173 static struct rdma_bind_list *cma_ps_find(struct net *net,
 174                                           enum rdma_port_space ps, int snum)
 175 {
 176         struct idr *idr = cma_pernet_idr(net, ps);
 177
 178         return idr_find(idr, snum);
 179 }
 180
 181 static void cma_ps_remove(struct net *net, enum rdma_port_space ps, int snum)
 182 {
 183         struct idr *idr = cma_pernet_idr(net, ps);
 184
 185         idr_remove(idr, snum);
 186 }
 187
 188 enum {
 189         CMA_OPTION_AFONLY,
 190 };
 191
 192 void cma_ref_dev(struct cma_device *cma_dev)
 193 {
 194         atomic_inc(&cma_dev->refcount);
 195 }
 196
 197 struct cma_device *cma_enum_devices_by_ibdev(cma_device_filter  filter,
 198                                              void               *cookie)
 199 {
 200         struct cma_device *cma_dev;
 201         struct cma_device *found_cma_dev = NULL;
 202
 203         mutex_lock(&lock);
 204
 205         list_for_each_entry(cma_dev, &dev_list, list)
 206                 if (filter(cma_dev->device, cookie)) {
 207                         found_cma_dev = cma_dev;
 208                         break;
 209                 }
 210
 211         if (found_cma_dev)
 212                 cma_ref_dev(found_cma_dev);
 213         mutex_unlock(&lock);
 214         return found_cma_dev;
 215 }
 216
 217 int cma_get_default_gid_type(struct cma_device *cma_dev,
 218                              unsigned int port)
 219 {
 220         if (port < rdma_start_port(cma_dev->device) ||
 221             port > rdma_end_port(cma_dev->device))
 222                 return -EINVAL;
 223
 224         return cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)];
 225 }
 226
 227 int cma_set_default_gid_type(struct cma_device *cma_dev,
 228                              unsigned int port,
 229                              enum ib_gid_type default_gid_type)
 230 {
 231         unsigned long supported_gids;
 232
 233         if (port < rdma_start_port(cma_dev->device) ||
 234             port > rdma_end_port(cma_dev->device))
 235                 return -EINVAL;
 236
 237         supported_gids = roce_gid_type_mask_support(cma_dev->device, port);
 238
 239         if (!(supported_gids & 1 << default_gid_type))
 240                 return -EINVAL;
 241
 242         cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)] =
 243                 default_gid_type;
 244
 245         return 0;
 246 }
 247
 248 struct ib_device *cma_get_ib_dev(struct cma_device *cma_dev)
 249 {
 250         return cma_dev->device;
 251 }
 252
 253 /*
 254  * Device removal can occur at anytime, so we need extra handling to
 255  * serialize notifying the user of device removal with other callbacks.
 256  * We do this by disabling removal notification while a callback is in process,
 257  * and reporting it after the callback completes.
 258  */
 259 struct rdma_id_private {
 260         struct rdma_cm_id       id;
 261
 262         struct rdma_bind_list   *bind_list;
 263         struct hlist_node       node;
 264         struct list_head        list; /* listen_any_list or cma_device.list */
 265         struct list_head        listen_list; /* per device listens */
 266         struct cma_device       *cma_dev;
 267         struct list_head        mc_list;
 268
 269         int                     internal_id;
 270         enum rdma_cm_state      state;
 271         spinlock_t              lock;
 272         struct mutex            qp_mutex;
 273
 274         struct completion       comp;
 275         atomic_t                refcount;
 276         struct mutex            handler_mutex;
 277
 278         int                     backlog;
 279         int                     timeout_ms;
 280         struct ib_sa_query      *query;
 281         int                     query_id;
 282         union {
 283                 struct ib_cm_id *ib;
 284                 struct iw_cm_id *iw;
 285         } cm_id;
 286
 287         u32                     seq_num;
 288         u32                     qkey;
 289         u32                     qp_num;
 290         pid_t                   owner;
 291         u32                     options;
 292         u8                      srq;
 293         u8                      tos;
 294         u8                      reuseaddr;
 295         u8                      afonly;
 296         enum ib_gid_type        gid_type;
 297 };
 298
 299 struct cma_multicast {
 300         struct rdma_id_private *id_priv;
 301         union {
 302                 struct ib_sa_multicast *ib;
 303         } multicast;
 304         struct list_head        list;
 305         void                    *context;
 306         struct sockaddr_storage addr;
 307         struct kref             mcref;
 308         bool                    igmp_joined;
 309 };
 310
 311 struct cma_work {
 312         struct work_struct      work;
 313         struct rdma_id_private  *id;
 314         enum rdma_cm_state      old_state;
 315         enum rdma_cm_state      new_state;
 316         struct rdma_cm_event    event;
 317 };
 318
 319 struct cma_ndev_work {
 320         struct work_struct      work;
 321         struct rdma_id_private  *id;
 322         struct rdma_cm_event    event;
 323 };
 324
 325 struct iboe_mcast_work {
 326         struct work_struct       work;
 327         struct rdma_id_private  *id;
 328         struct cma_multicast    *mc;
 329 };
 330
 331 union cma_ip_addr {
 332         struct in6_addr ip6;
 333         struct {
 334                 __be32 pad[3];
 335                 __be32 addr;
 336         } ip4;
 337 };
 338
 339 struct cma_hdr {
 340         u8 cma_version;
 341         u8 ip_version;  /* IP version: 7:4 */
 342         __be16 port;
 343         union cma_ip_addr src_addr;
 344         union cma_ip_addr dst_addr;
 345 };
 346
 347 #define CMA_VERSION 0x00
 348
 349 struct cma_req_info {
 350         struct ib_device *device;
 351         int port;
 352         union ib_gid local_gid;
 353         __be64 service_id;
 354         u16 pkey;
 355         bool has_gid:1;
 356 };
 357
 358 static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp)
 359 {
 360         unsigned long flags;
 361         int ret;
 362
 363         spin_lock_irqsave(&id_priv->lock, flags);
 364         ret = (id_priv->state == comp);
 365         spin_unlock_irqrestore(&id_priv->lock, flags);
 366         return ret;
 367 }
 368
 369 static int cma_comp_exch(struct rdma_id_private *id_priv,
 370                          enum rdma_cm_state comp, enum rdma_cm_state exch)
 371 {
 372         unsigned long flags;
 373         int ret;
 374
 375         spin_lock_irqsave(&id_priv->lock, flags);
 376         if ((ret = (id_priv->state == comp)))
 377                 id_priv->state = exch;
 378         spin_unlock_irqrestore(&id_priv->lock, flags);
 379         return ret;
 380 }
 381
 382 static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv,
 383                                    enum rdma_cm_state exch)
 384 {
 385         unsigned long flags;
 386         enum rdma_cm_state old;
 387
 388         spin_lock_irqsave(&id_priv->lock, flags);
 389         old = id_priv->state;
 390         id_priv->state = exch;
 391         spin_unlock_irqrestore(&id_priv->lock, flags);
 392         return old;
 393 }
 394
 395 static inline u8 cma_get_ip_ver(const struct cma_hdr *hdr)
 396 {
 397         return hdr->ip_version >> 4;
 398 }
 399
 400 static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
 401 {
 402         hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
 403 }
 404
 405 static int cma_igmp_send(struct net_device *ndev, union ib_gid *mgid, bool join)
 406 {
 407         struct in_device *in_dev = NULL;
 408
 409         if (ndev) {
 410                 rtnl_lock();
 411                 in_dev = __in_dev_get_rtnl(ndev);
 412                 if (in_dev) {
 413                         if (join)
 414                                 ip_mc_inc_group(in_dev,
 415                                                 *(__be32 *)(mgid->raw + 12));
 416                         else
 417                                 ip_mc_dec_group(in_dev,
 418                                                 *(__be32 *)(mgid->raw + 12));
 419                 }
 420                 rtnl_unlock();
 421         }
 422         return (in_dev) ? 0 : -ENODEV;
 423 }
 424
 425 static void _cma_attach_to_dev(struct rdma_id_private *id_priv,
 426                                struct cma_device *cma_dev)
 427 {
 428         cma_ref_dev(cma_dev);
 429         id_priv->cma_dev = cma_dev;
 430         id_priv->gid_type = 0;
 431         id_priv->id.device = cma_dev->device;
 432         id_priv->id.route.addr.dev_addr.transport =
 433                 rdma_node_get_transport(cma_dev->device->node_type);
 434         list_add_tail(&id_priv->list, &cma_dev->id_list);
 435 }
 436
 437 static void cma_attach_to_dev(struct rdma_id_private *id_priv,
 438                               struct cma_device *cma_dev)
 439 {
 440         _cma_attach_to_dev(id_priv, cma_dev);
 441         id_priv->gid_type =
 442                 cma_dev->default_gid_type[id_priv->id.port_num -
 443                                           rdma_start_port(cma_dev->device)];
 444 }
 445
 446 void cma_deref_dev(struct cma_device *cma_dev)
 447 {
 448         if (atomic_dec_and_test(&cma_dev->refcount))
 449                 complete(&cma_dev->comp);
 450 }
 451
 452 static inline void release_mc(struct kref *kref)
 453 {
 454         struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);
 455
 456         kfree(mc->multicast.ib);
 457         kfree(mc);
 458 }
 459
 460 static void cma_release_dev(struct rdma_id_private *id_priv)
 461 {
 462         mutex_lock(&lock);
 463         list_del(&id_priv->list);
 464         cma_deref_dev(id_priv->cma_dev);
 465         id_priv->cma_dev = NULL;
 466         mutex_unlock(&lock);
 467 }
 468
 469 static inline struct sockaddr *cma_src_addr(struct rdma_id_private *id_priv)
 470 {
 471         return (struct sockaddr *) &id_priv->id.route.addr.src_addr;
 472 }
 473
 474 static inline struct sockaddr *cma_dst_addr(struct rdma_id_private *id_priv)
 475 {
 476         return (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
 477 }
 478
 479 static inline unsigned short cma_family(struct rdma_id_private *id_priv)
 480 {
 481         return id_priv->id.route.addr.src_addr.ss_family;
 482 }
 483
 484 static int cma_set_qkey(struct rdma_id_private *id_priv, u32 qkey)
 485 {
 486         struct ib_sa_mcmember_rec rec;
 487         int ret = 0;
 488
 489         if (id_priv->qkey) {
 490                 if (qkey && id_priv->qkey != qkey)
 491                         return -EINVAL;
 492                 return 0;
 493         }
 494
 495         if (qkey) {
 496                 id_priv->qkey = qkey;
 497                 return 0;
 498         }
 499
 500         switch (id_priv->id.ps) {
 501         case RDMA_PS_UDP:
 502         case RDMA_PS_IB:
 503                 id_priv->qkey = RDMA_UDP_QKEY;
 504                 break;
 505         case RDMA_PS_IPOIB:
 506                 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
 507                 ret = ib_sa_get_mcmember_rec(id_priv->id.device,
 508                                              id_priv->id.port_num, &rec.mgid,
 509                                              &rec);
 510                 if (!ret)
 511                         id_priv->qkey = be32_to_cpu(rec.qkey);
 512                 break;
 513         default:
 514                 break;
 515         }
 516         return ret;
 517 }
 518
 519 static void cma_translate_ib(struct sockaddr_ib *sib, struct rdma_dev_addr *dev_addr)
 520 {
 521         dev_addr->dev_type = ARPHRD_INFINIBAND;
 522         rdma_addr_set_sgid(dev_addr, (union ib_gid *) &sib->sib_addr);
 523         ib_addr_set_pkey(dev_addr, ntohs(sib->sib_pkey));
 524 }
 525
 526 static int cma_translate_addr(struct sockaddr *addr, struct rdma_dev_addr *dev_addr)
 527 {
 528         int ret;
 529
 530         if (addr->sa_family != AF_IB) {
 531                 ret = rdma_translate_ip(addr, dev_addr, NULL);
 532         } else {
 533                 cma_translate_ib((struct sockaddr_ib *) addr, dev_addr);
 534                 ret = 0;
 535         }
 536
 537         return ret;
 538 }
 539
 540 static inline int cma_validate_port(struct ib_device *device, u8 port,
 541                                     enum ib_gid_type gid_type,
 542                                       union ib_gid *gid, int dev_type,
 543                                       int bound_if_index)
 544 {
 545         int ret = -ENODEV;
 546         struct net_device *ndev = NULL;
 547
 548         if ((dev_type == ARPHRD_INFINIBAND) && !rdma_protocol_ib(device, port))
 549                 return ret;
 550
 551         if ((dev_type != ARPHRD_INFINIBAND) && rdma_protocol_ib(device, port))
 552                 return ret;
 553
 554         if (dev_type == ARPHRD_ETHER && rdma_protocol_roce(device, port)) {
 555                 ndev = dev_get_by_index(&init_net, bound_if_index);
 556                 if (ndev && ndev->flags & IFF_LOOPBACK) {
 557                         pr_info("detected loopback device\n");
 558                         dev_put(ndev);
 559
 560                         if (!device->get_netdev)
 561                                 return -EOPNOTSUPP;
 562
 563                         ndev = device->get_netdev(device, port);
 564                         if (!ndev)
 565                                 return -ENODEV;
 566                 }
 567         } else {
 568                 gid_type = IB_GID_TYPE_IB;
 569         }
 570
 571         ret = ib_find_cached_gid_by_port(device, gid, gid_type, port,
 572                                          ndev, NULL);
 573
 574         if (ndev)
 575                 dev_put(ndev);
 576
 577         return ret;
 578 }
 579
 580 static int cma_acquire_dev(struct rdma_id_private *id_priv,
 581                            struct rdma_id_private *listen_id_priv)
 582 {
 583         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
 584         struct cma_device *cma_dev;
 585         union ib_gid gid, iboe_gid, *gidp;
 586         int ret = -ENODEV;
 587         u8 port;
 588
 589         if (dev_addr->dev_type != ARPHRD_INFINIBAND &&
 590             id_priv->id.ps == RDMA_PS_IPOIB)
 591                 return -EINVAL;
 592
 593         mutex_lock(&lock);
 594         rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
 595                     &iboe_gid);
 596
 597         memcpy(&gid, dev_addr->src_dev_addr +
 598                rdma_addr_gid_offset(dev_addr), sizeof gid);
 599
 600         if (listen_id_priv) {
 601                 cma_dev = listen_id_priv->cma_dev;
 602                 port = listen_id_priv->id.port_num;
 603                 gidp = rdma_protocol_roce(cma_dev->device, port) ?
 604                        &iboe_gid : &gid;
 605
 606                 ret = cma_validate_port(cma_dev->device, port,
 607                                         rdma_protocol_ib(cma_dev->device, port) ?
 608                                         IB_GID_TYPE_IB :
 609                                         listen_id_priv->gid_type, gidp,
 610                                         dev_addr->dev_type,
 611                                         dev_addr->bound_dev_if);
 612                 if (!ret) {
 613                         id_priv->id.port_num = port;
 614                         goto out;
 615                 }
 616         }
 617
 618         list_for_each_entry(cma_dev, &dev_list, list) {
 619                 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
 620                         if (listen_id_priv &&
 621                             listen_id_priv->cma_dev == cma_dev &&
 622                             listen_id_priv->id.port_num == port)
 623                                 continue;
 624
 625                         gidp = rdma_protocol_roce(cma_dev->device, port) ?
 626                                &iboe_gid : &gid;
 627
 628                         ret = cma_validate_port(cma_dev->device, port,
 629                                                 rdma_protocol_ib(cma_dev->device, port) ?
 630                                                 IB_GID_TYPE_IB :
 631                                                 cma_dev->default_gid_type[port - 1],
 632                                                 gidp, dev_addr->dev_type,
 633                                                 dev_addr->bound_dev_if);
 634                         if (!ret) {
 635                                 id_priv->id.port_num = port;
 636                                 goto out;
 637                         }
 638                 }
 639         }
 640
 641 out:
 642         if (!ret)
 643                 cma_attach_to_dev(id_priv, cma_dev);
 644
 645         mutex_unlock(&lock);
 646         return ret;
 647 }
 648
 649 /*
 650  * Select the source IB device and address to reach the destination IB address.
 651  */
 652 static int cma_resolve_ib_dev(struct rdma_id_private *id_priv)
 653 {
 654         struct cma_device *cma_dev, *cur_dev;
 655         struct sockaddr_ib *addr;
 656         union ib_gid gid, sgid, *dgid;
 657         u16 pkey, index;
 658         u8 p;
 659         int i;
 660
 661         cma_dev = NULL;
 662         addr = (struct sockaddr_ib *) cma_dst_addr(id_priv);
 663         dgid = (union ib_gid *) &addr->sib_addr;
 664         pkey = ntohs(addr->sib_pkey);
 665
 666         list_for_each_entry(cur_dev, &dev_list, list) {
 667                 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
 668                         if (!rdma_cap_af_ib(cur_dev->device, p))
 669                                 continue;
 670
 671                         if (ib_find_cached_pkey(cur_dev->device, p, pkey, &index))
 672                                 continue;
 673
 674                         for (i = 0; !ib_get_cached_gid(cur_dev->device, p, i,
 675                                                        &gid, NULL);
 676                              i++) {
 677                                 if (!memcmp(&gid, dgid, sizeof(gid))) {
 678                                         cma_dev = cur_dev;
 679                                         sgid = gid;
 680                                         id_priv->id.port_num = p;
 681                                         goto found;
 682                                 }
 683
 684                                 if (!cma_dev && (gid.global.subnet_prefix ==
 685                                                  dgid->global.subnet_prefix)) {
 686                                         cma_dev = cur_dev;
 687                                         sgid = gid;
 688                                         id_priv->id.port_num = p;
 689                                 }
 690                         }
 691                 }
 692         }
 693
 694         if (!cma_dev)
 695                 return -ENODEV;
 696
 697 found:
 698         cma_attach_to_dev(id_priv, cma_dev);
 699         addr = (struct sockaddr_ib *) cma_src_addr(id_priv);
 700         memcpy(&addr->sib_addr, &sgid, sizeof sgid);
 701         cma_translate_ib(addr, &id_priv->id.route.addr.dev_addr);
 702         return 0;
 703 }
 704
 705 static void cma_deref_id(struct rdma_id_private *id_priv)
 706 {
 707         if (atomic_dec_and_test(&id_priv->refcount))
 708                 complete(&id_priv->comp);
 709 }
 710
 711 static int cma_disable_callback(struct rdma_id_private *id_priv,
 712                                 enum rdma_cm_state state)
 713 {
 714         mutex_lock(&id_priv->handler_mutex);
 715         if (id_priv->state != state) {
 716                 mutex_unlock(&id_priv->handler_mutex);
 717                 return -EINVAL;
 718         }
 719         return 0;
 720 }
 721
 722 struct rdma_cm_id *rdma_create_id(struct net *net,
 723                                   rdma_cm_event_handler event_handler,
 724                                   void *context, enum rdma_port_space ps,
 725                                   enum ib_qp_type qp_type)
 726 {
 727         struct rdma_id_private *id_priv;
 728
 729         id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
 730         if (!id_priv)
 731                 return ERR_PTR(-ENOMEM);
 732
 733         id_priv->owner = task_pid_nr(current);
 734         id_priv->state = RDMA_CM_IDLE;
 735         id_priv->id.context = context;
 736         id_priv->id.event_handler = event_handler;
 737         id_priv->id.ps = ps;
 738         id_priv->id.qp_type = qp_type;
 739         spin_lock_init(&id_priv->lock);
 740         mutex_init(&id_priv->qp_mutex);
 741         init_completion(&id_priv->comp);
 742         atomic_set(&id_priv->refcount, 1);
 743         mutex_init(&id_priv->handler_mutex);
 744         INIT_LIST_HEAD(&id_priv->listen_list);
 745         INIT_LIST_HEAD(&id_priv->mc_list);
 746         get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
 747         id_priv->id.route.addr.dev_addr.net = get_net(net);
 748
 749         return &id_priv->id;
 750 }
 751 EXPORT_SYMBOL(rdma_create_id);
 752
 753 static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
 754 {
 755         struct ib_qp_attr qp_attr;
 756         int qp_attr_mask, ret;
 757
 758         qp_attr.qp_state = IB_QPS_INIT;
 759         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 760         if (ret)
 761                 return ret;
 762
 763         ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
 764         if (ret)
 765                 return ret;
 766
 767         qp_attr.qp_state = IB_QPS_RTR;
 768         ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
 769         if (ret)
 770                 return ret;
 771
 772         qp_attr.qp_state = IB_QPS_RTS;
 773         qp_attr.sq_psn = 0;
 774         ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
 775
 776         return ret;
 777 }
 778
 779 static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
 780 {
 781         struct ib_qp_attr qp_attr;
 782         int qp_attr_mask, ret;
 783
 784         qp_attr.qp_state = IB_QPS_INIT;
 785         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 786         if (ret)
 787                 return ret;
 788
 789         return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
 790 }
 791
 792 int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
 793                    struct ib_qp_init_attr *qp_init_attr)
 794 {
 795         struct rdma_id_private *id_priv;
 796         struct ib_qp *qp;
 797         int ret;
 798
 799         id_priv = container_of(id, struct rdma_id_private, id);
 800         if (id->device != pd->device)
 801                 return -EINVAL;
 802
 803         qp_init_attr->port_num = id->port_num;
 804         qp = ib_create_qp(pd, qp_init_attr);
 805         if (IS_ERR(qp))
 806                 return PTR_ERR(qp);
 807
 808         if (id->qp_type == IB_QPT_UD)
 809                 ret = cma_init_ud_qp(id_priv, qp);
 810         else
 811                 ret = cma_init_conn_qp(id_priv, qp);
 812         if (ret)
 813                 goto err;
 814
 815         id->qp = qp;
 816         id_priv->qp_num = qp->qp_num;
 817         id_priv->srq = (qp->srq != NULL);
 818         return 0;
 819 err:
 820         ib_destroy_qp(qp);
 821         return ret;
 822 }
 823 EXPORT_SYMBOL(rdma_create_qp);
 824
 825 void rdma_destroy_qp(struct rdma_cm_id *id)
 826 {
 827         struct rdma_id_private *id_priv;
 828
 829         id_priv = container_of(id, struct rdma_id_private, id);
 830         mutex_lock(&id_priv->qp_mutex);
 831         ib_destroy_qp(id_priv->id.qp);
 832         id_priv->id.qp = NULL;
 833         mutex_unlock(&id_priv->qp_mutex);
 834 }
 835 EXPORT_SYMBOL(rdma_destroy_qp);
 836
 837 static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
 838                              struct rdma_conn_param *conn_param)
 839 {
 840         struct ib_qp_attr qp_attr;
 841         int qp_attr_mask, ret;
 842         union ib_gid sgid;
 843
 844         mutex_lock(&id_priv->qp_mutex);
 845         if (!id_priv->id.qp) {
 846                 ret = 0;
 847                 goto out;
 848         }
 849
 850         /* Need to update QP attributes from default values. */
 851         qp_attr.qp_state = IB_QPS_INIT;
 852         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 853         if (ret)
 854                 goto out;
 855
 856         ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
 857         if (ret)
 858                 goto out;
 859
 860         qp_attr.qp_state = IB_QPS_RTR;
 861         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 862         if (ret)
 863                 goto out;
 864
 865         ret = ib_query_gid(id_priv->id.device, id_priv->id.port_num,
 866                            qp_attr.ah_attr.grh.sgid_index, &sgid, NULL);
 867         if (ret)
 868                 goto out;
 869
 870         BUG_ON(id_priv->cma_dev->device != id_priv->id.device);
 871
 872         if (conn_param)
 873                 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
 874         ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
 875 out:
 876         mutex_unlock(&id_priv->qp_mutex);
 877         return ret;
 878 }
 879
 880 static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
 881                              struct rdma_conn_param *conn_param)
 882 {
 883         struct ib_qp_attr qp_attr;
 884         int qp_attr_mask, ret;
 885
 886         mutex_lock(&id_priv->qp_mutex);
 887         if (!id_priv->id.qp) {
 888                 ret = 0;
 889                 goto out;
 890         }
 891
 892         qp_attr.qp_state = IB_QPS_RTS;
 893         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 894         if (ret)
 895                 goto out;
 896
 897         if (conn_param)
 898                 qp_attr.max_rd_atomic = conn_param->initiator_depth;
 899         ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
 900 out:
 901         mutex_unlock(&id_priv->qp_mutex);
 902         return ret;
 903 }
 904
 905 static int cma_modify_qp_err(struct rdma_id_private *id_priv)
 906 {
 907         struct ib_qp_attr qp_attr;
 908         int ret;
 909
 910         mutex_lock(&id_priv->qp_mutex);
 911         if (!id_priv->id.qp) {
 912                 ret = 0;
 913                 goto out;
 914         }
 915
 916         qp_attr.qp_state = IB_QPS_ERR;
 917         ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
 918 out:
 919         mutex_unlock(&id_priv->qp_mutex);
 920         return ret;
 921 }
 922
 923 static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
 924                                struct ib_qp_attr *qp_attr, int *qp_attr_mask)
 925 {
 926         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
 927         int ret;
 928         u16 pkey;
 929
 930         if (rdma_cap_eth_ah(id_priv->id.device, id_priv->id.port_num))
 931                 pkey = 0xffff;
 932         else
 933                 pkey = ib_addr_get_pkey(dev_addr);
 934
 935         ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
 936                                   pkey, &qp_attr->pkey_index);
 937         if (ret)
 938                 return ret;
 939
 940         qp_attr->port_num = id_priv->id.port_num;
 941         *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
 942
 943         if (id_priv->id.qp_type == IB_QPT_UD) {
 944                 ret = cma_set_qkey(id_priv, 0);
 945                 if (ret)
 946                         return ret;
 947
 948                 qp_attr->qkey = id_priv->qkey;
 949                 *qp_attr_mask |= IB_QP_QKEY;
 950         } else {
 951                 qp_attr->qp_access_flags = 0;
 952                 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
 953         }
 954         return 0;
 955 }
 956
 957 int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
 958                        int *qp_attr_mask)
 959 {
 960         struct rdma_id_private *id_priv;
 961         int ret = 0;
 962
 963         id_priv = container_of(id, struct rdma_id_private, id);
 964         if (rdma_cap_ib_cm(id->device, id->port_num)) {
 965                 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD))
 966                         ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
 967                 else
 968                         ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
 969                                                  qp_attr_mask);
 970
 971                 if (qp_attr->qp_state == IB_QPS_RTR)
 972                         qp_attr->rq_psn = id_priv->seq_num;
 973         } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
 974                 if (!id_priv->cm_id.iw) {
 975                         qp_attr->qp_access_flags = 0;
 976                         *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
 977                 } else
 978                         ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
 979                                                  qp_attr_mask);
 980         } else
 981                 ret = -ENOSYS;
 982
 983         return ret;
 984 }
 985 EXPORT_SYMBOL(rdma_init_qp_attr);
 986
 987 static inline int cma_zero_addr(struct sockaddr *addr)
 988 {
 989         switch (addr->sa_family) {
 990         case AF_INET:
 991                 return ipv4_is_zeronet(((struct sockaddr_in *)addr)->sin_addr.s_addr);
 992         case AF_INET6:
 993                 return ipv6_addr_any(&((struct sockaddr_in6 *) addr)->sin6_addr);
 994         case AF_IB:
 995                 return ib_addr_any(&((struct sockaddr_ib *) addr)->sib_addr);
 996         default:
 997                 return 0;
 998         }
 999 }
1000
1001 static inline int cma_loopback_addr(struct sockaddr *addr)
1002 {
1003         switch (addr->sa_family) {
1004         case AF_INET:
1005                 return ipv4_is_loopback(((struct sockaddr_in *) addr)->sin_addr.s_addr);
1006         case AF_INET6:
1007                 return ipv6_addr_loopback(&((struct sockaddr_in6 *) addr)->sin6_addr);
1008         case AF_IB:
1009                 return ib_addr_loopback(&((struct sockaddr_ib *) addr)->sib_addr);
1010         default:
1011                 return 0;
1012         }
1013 }
1014
1015 static inline int cma_any_addr(struct sockaddr *addr)
1016 {
1017         return cma_zero_addr(addr) || cma_loopback_addr(addr);
1018 }
1019
1020 static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst)
1021 {
1022         if (src->sa_family != dst->sa_family)
1023                 return -1;
1024
1025         switch (src->sa_family) {
1026         case AF_INET:
1027                 return ((struct sockaddr_in *) src)->sin_addr.s_addr !=
1028                        ((struct sockaddr_in *) dst)->sin_addr.s_addr;
1029         case AF_INET6:
1030                 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr,
1031                                      &((struct sockaddr_in6 *) dst)->sin6_addr);
1032         default:
1033                 return ib_addr_cmp(&((struct sockaddr_ib *) src)->sib_addr,
1034                                    &((struct sockaddr_ib *) dst)->sib_addr);
1035         }
1036 }
1037
1038 static __be16 cma_port(struct sockaddr *addr)
1039 {
1040         struct sockaddr_ib *sib;
1041
1042         switch (addr->sa_family) {
1043         case AF_INET:
1044                 return ((struct sockaddr_in *) addr)->sin_port;
1045         case AF_INET6:
1046                 return ((struct sockaddr_in6 *) addr)->sin6_port;
1047         case AF_IB:
1048                 sib = (struct sockaddr_ib *) addr;
1049                 return htons((u16) (be64_to_cpu(sib->sib_sid) &
1050                                     be64_to_cpu(sib->sib_sid_mask)));
1051         default:
1052                 return 0;
1053         }
1054 }
1055
1056 static inline int cma_any_port(struct sockaddr *addr)
1057 {
1058         return !cma_port(addr);
1059 }
1060
1061 static void cma_save_ib_info(struct sockaddr *src_addr,
1062                              struct sockaddr *dst_addr,
1063                              struct rdma_cm_id *listen_id,
1064                              struct ib_sa_path_rec *path)
1065 {
1066         struct sockaddr_ib *listen_ib, *ib;
1067
1068         listen_ib = (struct sockaddr_ib *) &listen_id->route.addr.src_addr;
1069         if (src_addr) {
1070                 ib = (struct sockaddr_ib *)src_addr;
1071                 ib->sib_family = AF_IB;
1072                 if (path) {
1073                         ib->sib_pkey = path->pkey;
1074                         ib->sib_flowinfo = path->flow_label;
1075                         memcpy(&ib->sib_addr, &path->sgid, 16);
1076                         ib->sib_sid = path->service_id;
1077                         ib->sib_scope_id = 0;
1078                 } else {
1079                         ib->sib_pkey = listen_ib->sib_pkey;
1080                         ib->sib_flowinfo = listen_ib->sib_flowinfo;
1081                         ib->sib_addr = listen_ib->sib_addr;
1082                         ib->sib_sid = listen_ib->sib_sid;
1083                         ib->sib_scope_id = listen_ib->sib_scope_id;
1084                 }
1085                 ib->sib_sid_mask = cpu_to_be64(0xffffffffffffffffULL);
1086         }
1087         if (dst_addr) {
1088                 ib = (struct sockaddr_ib *)dst_addr;
1089                 ib->sib_family = AF_IB;
1090                 if (path) {
1091                         ib->sib_pkey = path->pkey;
1092                         ib->sib_flowinfo = path->flow_label;
1093                         memcpy(&ib->sib_addr, &path->dgid, 16);
1094                 }
1095         }
1096 }
1097
1098 static void cma_save_ip4_info(struct sockaddr *src_addr,
1099                               struct sockaddr *dst_addr,
1100                               struct cma_hdr *hdr,
1101                               __be16 local_port)
1102 {
1103         struct sockaddr_in *ip4;
1104
1105         if (src_addr) {
1106                 ip4 = (struct sockaddr_in *)src_addr;
1107                 ip4->sin_family = AF_INET;
1108                 ip4->sin_addr.s_addr = hdr->dst_addr.ip4.addr;
1109                 ip4->sin_port = local_port;
1110         }
1111
1112         if (dst_addr) {
1113                 ip4 = (struct sockaddr_in *)dst_addr;
1114                 ip4->sin_family = AF_INET;
1115                 ip4->sin_addr.s_addr = hdr->src_addr.ip4.addr;
1116                 ip4->sin_port = hdr->port;
1117         }
1118 }
1119
1120 static void cma_save_ip6_info(struct sockaddr *src_addr,
1121                               struct sockaddr *dst_addr,
1122                               struct cma_hdr *hdr,
1123                               __be16 local_port)
1124 {
1125         struct sockaddr_in6 *ip6;
1126
1127         if (src_addr) {
1128                 ip6 = (struct sockaddr_in6 *)src_addr;
1129                 ip6->sin6_family = AF_INET6;
1130                 ip6->sin6_addr = hdr->dst_addr.ip6;
1131                 ip6->sin6_port = local_port;
1132         }
1133
1134         if (dst_addr) {
1135                 ip6 = (struct sockaddr_in6 *)dst_addr;
1136                 ip6->sin6_family = AF_INET6;
1137                 ip6->sin6_addr = hdr->src_addr.ip6;
1138                 ip6->sin6_port = hdr->port;
1139         }
1140 }
1141
1142 static u16 cma_port_from_service_id(__be64 service_id)
1143 {
1144         return (u16)be64_to_cpu(service_id);
1145 }
1146
1147 static int cma_save_ip_info(struct sockaddr *src_addr,
1148                             struct sockaddr *dst_addr,
1149                             struct ib_cm_event *ib_event,
1150                             __be64 service_id)
1151 {
1152         struct cma_hdr *hdr;
1153         __be16 port;
1154
1155         hdr = ib_event->private_data;
1156         if (hdr->cma_version != CMA_VERSION)
1157                 return -EINVAL;
1158
1159         port = htons(cma_port_from_service_id(service_id));
1160
1161         switch (cma_get_ip_ver(hdr)) {
1162         case 4:
1163                 cma_save_ip4_info(src_addr, dst_addr, hdr, port);
1164                 break;
1165         case 6:
1166                 cma_save_ip6_info(src_addr, dst_addr, hdr, port);
1167                 break;
1168         default:
1169                 return -EAFNOSUPPORT;
1170         }
1171
1172         return 0;
1173 }
1174
1175 static int cma_save_net_info(struct sockaddr *src_addr,
1176                              struct sockaddr *dst_addr,
1177                              struct rdma_cm_id *listen_id,
1178                              struct ib_cm_event *ib_event,
1179                              sa_family_t sa_family, __be64 service_id)
1180 {
1181         if (sa_family == AF_IB) {
1182                 if (ib_event->event == IB_CM_REQ_RECEIVED)
1183                         cma_save_ib_info(src_addr, dst_addr, listen_id,
1184                                          ib_event->param.req_rcvd.primary_path);
1185                 else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED)
1186                         cma_save_ib_info(src_addr, dst_addr, listen_id, NULL);
1187                 return 0;
1188         }
1189
1190         return cma_save_ip_info(src_addr, dst_addr, ib_event, service_id);
1191 }
1192
1193 static int cma_save_req_info(const struct ib_cm_event *ib_event,
1194                              struct cma_req_info *req)
1195 {
1196         const struct ib_cm_req_event_param *req_param =
1197                 &ib_event->param.req_rcvd;
1198         const struct ib_cm_sidr_req_event_param *sidr_param =
1199                 &ib_event->param.sidr_req_rcvd;
1200
1201         switch (ib_event->event) {
1202         case IB_CM_REQ_RECEIVED:
1203                 req->device     = req_param->listen_id->device;
1204                 req->port       = req_param->port;
1205                 memcpy(&req->local_gid, &req_param->primary_path->sgid,
1206                        sizeof(req->local_gid));
1207                 req->has_gid    = true;
1208                 req->service_id = req_param->primary_path->service_id;
1209                 req->pkey       = be16_to_cpu(req_param->primary_path->pkey);
1210                 if (req->pkey != req_param->bth_pkey)
1211                         pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and primary path P_Key (0x%x)\n"
1212                                             "RDMA CMA: in the future this may cause the request to be dropped\n",
1213                                             req_param->bth_pkey, req->pkey);
1214                 break;
1215         case IB_CM_SIDR_REQ_RECEIVED:
1216                 req->device     = sidr_param->listen_id->device;
1217                 req->port       = sidr_param->port;
1218                 req->has_gid    = false;
1219                 req->service_id = sidr_param->service_id;
1220                 req->pkey       = sidr_param->pkey;
1221                 if (req->pkey != sidr_param->bth_pkey)
1222                         pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and SIDR request payload P_Key (0x%x)\n"
1223                                             "RDMA CMA: in the future this may cause the request to be dropped\n",
1224                                             sidr_param->bth_pkey, req->pkey);
1225                 break;
1226         default:
1227                 return -EINVAL;
1228         }
1229
1230         return 0;
1231 }
1232
1233 static bool validate_ipv4_net_dev(struct net_device *net_dev,
1234                                   const struct sockaddr_in *dst_addr,
1235                                   const struct sockaddr_in *src_addr)
1236 {
1237         __be32 daddr = dst_addr->sin_addr.s_addr,
1238                saddr = src_addr->sin_addr.s_addr;
1239         struct fib_result res;
1240         struct flowi4 fl4;
1241         int err;
1242         bool ret;
1243
1244         if (ipv4_is_multicast(saddr) || ipv4_is_lbcast(saddr) ||
1245             ipv4_is_lbcast(daddr) || ipv4_is_zeronet(saddr) ||
1246             ipv4_is_zeronet(daddr) || ipv4_is_loopback(daddr) ||
1247             ipv4_is_loopback(saddr))
1248                 return false;
1249
1250         memset(&fl4, 0, sizeof(fl4));
1251         fl4.flowi4_iif = net_dev->ifindex;
1252         fl4.daddr = daddr;
1253         fl4.saddr = saddr;
1254
1255         rcu_read_lock();
1256         err = fib_lookup(dev_net(net_dev), &fl4, &res, 0);
1257         ret = err == 0 && FIB_RES_DEV(res) == net_dev;
1258         rcu_read_unlock();
1259
1260         return ret;
1261 }
1262
1263 static bool validate_ipv6_net_dev(struct net_device *net_dev,
1264                                   const struct sockaddr_in6 *dst_addr,
1265                                   const struct sockaddr_in6 *src_addr)
1266 {
1267 #if IS_ENABLED(CONFIG_IPV6)
1268         const int strict = ipv6_addr_type(&dst_addr->sin6_addr) &
1269                            IPV6_ADDR_LINKLOCAL;
1270         struct rt6_info *rt = rt6_lookup(dev_net(net_dev), &dst_addr->sin6_addr,
1271                                          &src_addr->sin6_addr, net_dev->ifindex,
1272                                          strict);
1273         bool ret;
1274
1275         if (!rt)
1276                 return false;
1277
1278         ret = rt->rt6i_idev->dev == net_dev;
1279         ip6_rt_put(rt);
1280
1281         return ret;
1282 #else
1283         return false;
1284 #endif
1285 }
1286
1287 static bool validate_net_dev(struct net_device *net_dev,
1288                              const struct sockaddr *daddr,
1289                              const struct sockaddr *saddr)
1290 {
1291         const struct sockaddr_in *daddr4 = (const struct sockaddr_in *)daddr;
1292         const struct sockaddr_in *saddr4 = (const struct sockaddr_in *)saddr;
1293         const struct sockaddr_in6 *daddr6 = (const struct sockaddr_in6 *)daddr;
1294         const struct sockaddr_in6 *saddr6 = (const struct sockaddr_in6 *)saddr;
1295
1296         switch (daddr->sa_family) {
1297         case AF_INET:
1298                 return saddr->sa_family == AF_INET &&
1299                        validate_ipv4_net_dev(net_dev, daddr4, saddr4);
1300
1301         case AF_INET6:
1302                 return saddr->sa_family == AF_INET6 &&
1303                        validate_ipv6_net_dev(net_dev, daddr6, saddr6);
1304
1305         default:
1306                 return false;
1307         }
1308 }
1309
1310 static struct net_device *cma_get_net_dev(struct ib_cm_event *ib_event,
1311                                           const struct cma_req_info *req)
1312 {
1313         struct sockaddr_storage listen_addr_storage, src_addr_storage;
1314         struct sockaddr *listen_addr = (struct sockaddr *)&listen_addr_storage,
1315                         *src_addr = (struct sockaddr *)&src_addr_storage;
1316         struct net_device *net_dev;
1317         const union ib_gid *gid = req->has_gid ? &req->local_gid : NULL;
1318         int err;
1319
1320         err = cma_save_ip_info(listen_addr, src_addr, ib_event,
1321                                req->service_id);
1322         if (err)
1323                 return ERR_PTR(err);
1324
1325         net_dev = ib_get_net_dev_by_params(req->device, req->port, req->pkey,
1326                                            gid, listen_addr);
1327         if (!net_dev)
1328                 return ERR_PTR(-ENODEV);
1329
1330         if (!validate_net_dev(net_dev, listen_addr, src_addr)) {
1331                 dev_put(net_dev);
1332                 return ERR_PTR(-EHOSTUNREACH);
1333         }
1334
1335         return net_dev;
1336 }
1337
1338 static enum rdma_port_space rdma_ps_from_service_id(__be64 service_id)
1339 {
1340         return (be64_to_cpu(service_id) >> 16) & 0xffff;
1341 }
1342
1343 static bool cma_match_private_data(struct rdma_id_private *id_priv,
1344                                    const struct cma_hdr *hdr)
1345 {
1346         struct sockaddr *addr = cma_src_addr(id_priv);
1347         __be32 ip4_addr;
1348         struct in6_addr ip6_addr;
1349
1350         if (cma_any_addr(addr) && !id_priv->afonly)
1351                 return true;
1352
1353         switch (addr->sa_family) {
1354         case AF_INET:
1355                 ip4_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
1356                 if (cma_get_ip_ver(hdr) != 4)
1357                         return false;
1358                 if (!cma_any_addr(addr) &&
1359                     hdr->dst_addr.ip4.addr != ip4_addr)
1360                         return false;
1361                 break;
1362         case AF_INET6:
1363                 ip6_addr = ((struct sockaddr_in6 *)addr)->sin6_addr;
1364                 if (cma_get_ip_ver(hdr) != 6)
1365                         return false;
1366                 if (!cma_any_addr(addr) &&
1367                     memcmp(&hdr->dst_addr.ip6, &ip6_addr, sizeof(ip6_addr)))
1368                         return false;
1369                 break;
1370         case AF_IB:
1371                 return true;
1372         default:
1373                 return false;
1374         }
1375
1376         return true;
1377 }
1378
1379 static bool cma_protocol_roce_dev_port(struct ib_device *device, int port_num)
1380 {
1381         enum rdma_link_layer ll = rdma_port_get_link_layer(device, port_num);
1382         enum rdma_transport_type transport =
1383                 rdma_node_get_transport(device->node_type);
1384
1385         return ll == IB_LINK_LAYER_ETHERNET && transport == RDMA_TRANSPORT_IB;
1386 }
1387
1388 static bool cma_protocol_roce(const struct rdma_cm_id *id)
1389 {
1390         struct ib_device *device = id->device;
1391         const int port_num = id->port_num ?: rdma_start_port(device);
1392
1393         return cma_protocol_roce_dev_port(device, port_num);
1394 }
1395
1396 static bool cma_match_net_dev(const struct rdma_cm_id *id,
1397                               const struct net_device *net_dev,
1398                               u8 port_num)
1399 {
1400         const struct rdma_addr *addr = &id->route.addr;
1401
1402         if (!net_dev)
1403                 /* This request is an AF_IB request or a RoCE request */
1404                 return (!id->port_num || id->port_num == port_num) &&
1405                        (addr->src_addr.ss_family == AF_IB ||
1406                         cma_protocol_roce_dev_port(id->device, port_num));
1407
1408         return !addr->dev_addr.bound_dev_if ||
1409                (net_eq(dev_net(net_dev), addr->dev_addr.net) &&
1410                 addr->dev_addr.bound_dev_if == net_dev->ifindex);
1411 }
1412
1413 static struct rdma_id_private *cma_find_listener(
1414                 const struct rdma_bind_list *bind_list,
1415                 const struct ib_cm_id *cm_id,
1416                 const struct ib_cm_event *ib_event,
1417                 const struct cma_req_info *req,
1418                 const struct net_device *net_dev)
1419 {
1420         struct rdma_id_private *id_priv, *id_priv_dev;
1421
1422         if (!bind_list)
1423                 return ERR_PTR(-EINVAL);
1424
1425         hlist_for_each_entry(id_priv, &bind_list->owners, node) {
1426                 if (cma_match_private_data(id_priv, ib_event->private_data)) {
1427                         if (id_priv->id.device == cm_id->device &&
1428                             cma_match_net_dev(&id_priv->id, net_dev, req->port))
1429                                 return id_priv;
1430                         list_for_each_entry(id_priv_dev,
1431                                             &id_priv->listen_list,
1432                                             listen_list) {
1433                                 if (id_priv_dev->id.device == cm_id->device &&
1434                                     cma_match_net_dev(&id_priv_dev->id, net_dev, req->port))
1435                                         return id_priv_dev;
1436                         }
1437                 }
1438         }
1439
1440         return ERR_PTR(-EINVAL);
1441 }
1442
1443 static struct rdma_id_private *cma_id_from_event(struct ib_cm_id *cm_id,
1444                                                  struct ib_cm_event *ib_event,
1445                                                  struct net_device **net_dev)
1446 {
1447         struct cma_req_info req;
1448         struct rdma_bind_list *bind_list;
1449         struct rdma_id_private *id_priv;
1450         int err;
1451
1452         err = cma_save_req_info(ib_event, &req);
1453         if (err)
1454                 return ERR_PTR(err);
1455
1456         *net_dev = cma_get_net_dev(ib_event, &req);
1457         if (IS_ERR(*net_dev)) {
1458                 if (PTR_ERR(*net_dev) == -EAFNOSUPPORT) {
1459                         /* Assuming the protocol is AF_IB */
1460                         *net_dev = NULL;
1461                 } else if (cma_protocol_roce_dev_port(req.device, req.port)) {
1462                         /* TODO find the net dev matching the request parameters
1463                          * through the RoCE GID table */
1464                         *net_dev = NULL;
1465                 } else {
1466                         return ERR_CAST(*net_dev);
1467                 }
1468         }
1469
1470         bind_list = cma_ps_find(*net_dev ? dev_net(*net_dev) : &init_net,
1471                                 rdma_ps_from_service_id(req.service_id),
1472                                 cma_port_from_service_id(req.service_id));
1473         id_priv = cma_find_listener(bind_list, cm_id, ib_event, &req, *net_dev);
1474         if (IS_ERR(id_priv) && *net_dev) {
1475                 dev_put(*net_dev);
1476                 *net_dev = NULL;
1477         }
1478
1479         return id_priv;
1480 }
1481
1482 static inline int cma_user_data_offset(struct rdma_id_private *id_priv)
1483 {
1484         return cma_family(id_priv) == AF_IB ? 0 : sizeof(struct cma_hdr);
1485 }
1486
1487 static void cma_cancel_route(struct rdma_id_private *id_priv)
1488 {
1489         if (rdma_cap_ib_sa(id_priv->id.device, id_priv->id.port_num)) {
1490                 if (id_priv->query)
1491                         ib_sa_cancel_query(id_priv->query_id, id_priv->query);
1492         }
1493 }
1494
1495 static void cma_cancel_listens(struct rdma_id_private *id_priv)
1496 {
1497         struct rdma_id_private *dev_id_priv;
1498
1499         /*
1500          * Remove from listen_any_list to prevent added devices from spawning
1501          * additional listen requests.
1502          */
1503         mutex_lock(&lock);
1504         list_del(&id_priv->list);
1505
1506         while (!list_empty(&id_priv->listen_list)) {
1507                 dev_id_priv = list_entry(id_priv->listen_list.next,
1508                                          struct rdma_id_private, listen_list);
1509                 /* sync with device removal to avoid duplicate destruction */
1510                 list_del_init(&dev_id_priv->list);
1511                 list_del(&dev_id_priv->listen_list);
1512                 mutex_unlock(&lock);
1513
1514                 rdma_destroy_id(&dev_id_priv->id);
1515                 mutex_lock(&lock);
1516         }
1517         mutex_unlock(&lock);
1518 }
1519
1520 static void cma_cancel_operation(struct rdma_id_private *id_priv,
1521                                  enum rdma_cm_state state)
1522 {
1523         switch (state) {
1524         case RDMA_CM_ADDR_QUERY:
1525                 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
1526                 break;
1527         case RDMA_CM_ROUTE_QUERY:
1528                 cma_cancel_route(id_priv);
1529                 break;
1530         case RDMA_CM_LISTEN:
1531                 if (cma_any_addr(cma_src_addr(id_priv)) && !id_priv->cma_dev)
1532                         cma_cancel_listens(id_priv);
1533                 break;
1534         default:
1535                 break;
1536         }
1537 }
1538
1539 static void cma_release_port(struct rdma_id_private *id_priv)
1540 {
1541         struct rdma_bind_list *bind_list = id_priv->bind_list;
1542         struct net *net = id_priv->id.route.addr.dev_addr.net;
1543
1544         if (!bind_list)
1545                 return;
1546
1547         mutex_lock(&lock);
1548         hlist_del(&id_priv->node);
1549         if (hlist_empty(&bind_list->owners)) {
1550                 cma_ps_remove(net, bind_list->ps, bind_list->port);
1551                 kfree(bind_list);
1552         }
1553         mutex_unlock(&lock);
1554 }
1555
1556 static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
1557 {
1558         struct cma_multicast *mc;
1559
1560         while (!list_empty(&id_priv->mc_list)) {
1561                 mc = container_of(id_priv->mc_list.next,
1562                                   struct cma_multicast, list);
1563                 list_del(&mc->list);
1564                 if (rdma_cap_ib_mcast(id_priv->cma_dev->device,
1565                                       id_priv->id.port_num)) {
1566                         ib_sa_free_multicast(mc->multicast.ib);
1567                         kfree(mc);
1568                 } else {
1569                         if (mc->igmp_joined) {
1570                                 struct rdma_dev_addr *dev_addr =
1571                                         &id_priv->id.route.addr.dev_addr;
1572                                 struct net_device *ndev = NULL;
1573
1574                                 if (dev_addr->bound_dev_if)
1575                                         ndev = dev_get_by_index(&init_net,
1576                                                                 dev_addr->bound_dev_if);
1577                                 if (ndev) {
1578                                         cma_igmp_send(ndev,
1579                                                       &mc->multicast.ib->rec.mgid,
1580                                                       false);
1581                                         dev_put(ndev);
1582                                 }
1583                         }
1584                         kref_put(&mc->mcref, release_mc);
1585                 }
1586         }
1587 }
1588
1589 void rdma_destroy_id(struct rdma_cm_id *id)
1590 {
1591         struct rdma_id_private *id_priv;
1592         enum rdma_cm_state state;
1593
1594         id_priv = container_of(id, struct rdma_id_private, id);
1595         state = cma_exch(id_priv, RDMA_CM_DESTROYING);
1596         cma_cancel_operation(id_priv, state);
1597
1598         /*
1599          * Wait for any active callback to finish.  New callbacks will find
1600          * the id_priv state set to destroying and abort.
1601          */
1602         mutex_lock(&id_priv->handler_mutex);
1603         mutex_unlock(&id_priv->handler_mutex);
1604
1605         if (id_priv->cma_dev) {
1606                 if (rdma_cap_ib_cm(id_priv->id.device, 1)) {
1607                         if (id_priv->cm_id.ib)
1608                                 ib_destroy_cm_id(id_priv->cm_id.ib);
1609                 } else if (rdma_cap_iw_cm(id_priv->id.device, 1)) {
1610                         if (id_priv->cm_id.iw)
1611                                 iw_destroy_cm_id(id_priv->cm_id.iw);
1612                 }
1613                 cma_leave_mc_groups(id_priv);
1614                 cma_release_dev(id_priv);
1615         }
1616
1617         cma_release_port(id_priv);
1618         cma_deref_id(id_priv);
1619         wait_for_completion(&id_priv->comp);
1620
1621         if (id_priv->internal_id)
1622                 cma_deref_id(id_priv->id.context);
1623
1624         kfree(id_priv->id.route.path_rec);
1625         put_net(id_priv->id.route.addr.dev_addr.net);
1626         kfree(id_priv);
1627 }
1628 EXPORT_SYMBOL(rdma_destroy_id);
1629
1630 static int cma_rep_recv(struct rdma_id_private *id_priv)
1631 {
1632         int ret;
1633
1634         ret = cma_modify_qp_rtr(id_priv, NULL);
1635         if (ret)
1636                 goto reject;
1637
1638         ret = cma_modify_qp_rts(id_priv, NULL);
1639         if (ret)
1640                 goto reject;
1641
1642         ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
1643         if (ret)
1644                 goto reject;
1645
1646         return 0;
1647 reject:
1648         cma_modify_qp_err(id_priv);
1649         ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
1650                        NULL, 0, NULL, 0);
1651         return ret;
1652 }
1653
1654 static void cma_set_rep_event_data(struct rdma_cm_event *event,
1655                                    struct ib_cm_rep_event_param *rep_data,
1656                                    void *private_data)
1657 {
1658         event->param.conn.private_data = private_data;
1659         event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
1660         event->param.conn.responder_resources = rep_data->responder_resources;
1661         event->param.conn.initiator_depth = rep_data->initiator_depth;
1662         event->param.conn.flow_control = rep_data->flow_control;
1663         event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
1664         event->param.conn.srq = rep_data->srq;
1665         event->param.conn.qp_num = rep_data->remote_qpn;
1666 }
1667
1668 static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1669 {
1670         struct rdma_id_private *id_priv = cm_id->context;
1671         struct rdma_cm_event event;
1672         int ret = 0;
1673
1674         if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
1675                 cma_disable_callback(id_priv, RDMA_CM_CONNECT)) ||
1676             (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
1677                 cma_disable_callback(id_priv, RDMA_CM_DISCONNECT)))
1678                 return 0;
1679
1680         memset(&event, 0, sizeof event);
1681         switch (ib_event->event) {
1682         case IB_CM_REQ_ERROR:
1683         case IB_CM_REP_ERROR:
1684                 event.event = RDMA_CM_EVENT_UNREACHABLE;
1685                 event.status = -ETIMEDOUT;
1686                 break;
1687         case IB_CM_REP_RECEIVED:
1688                 if (id_priv->id.qp) {
1689                         event.status = cma_rep_recv(id_priv);
1690                         event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
1691                                                      RDMA_CM_EVENT_ESTABLISHED;
1692                 } else {
1693                         event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
1694                 }
1695                 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
1696                                        ib_event->private_data);
1697                 break;
1698         case IB_CM_RTU_RECEIVED:
1699         case IB_CM_USER_ESTABLISHED:
1700                 event.event = RDMA_CM_EVENT_ESTABLISHED;
1701                 break;
1702         case IB_CM_DREQ_ERROR:
1703                 event.status = -ETIMEDOUT; /* fall through */
1704         case IB_CM_DREQ_RECEIVED:
1705         case IB_CM_DREP_RECEIVED:
1706                 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT,
1707                                    RDMA_CM_DISCONNECT))
1708                         goto out;
1709                 event.event = RDMA_CM_EVENT_DISCONNECTED;
1710                 break;
1711         case IB_CM_TIMEWAIT_EXIT:
1712                 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
1713                 break;
1714         case IB_CM_MRA_RECEIVED:
1715                 /* ignore event */
1716                 goto out;
1717         case IB_CM_REJ_RECEIVED:
1718                 cma_modify_qp_err(id_priv);
1719                 event.status = ib_event->param.rej_rcvd.reason;
1720                 event.event = RDMA_CM_EVENT_REJECTED;
1721                 event.param.conn.private_data = ib_event->private_data;
1722                 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
1723                 break;
1724         default:
1725                 pr_err("RDMA CMA: unexpected IB CM event: %d\n",
1726                        ib_event->event);
1727                 goto out;
1728         }
1729
1730         ret = id_priv->id.event_handler(&id_priv->id, &event);
1731         if (ret) {
1732                 /* Destroy the CM ID by returning a non-zero value. */
1733                 id_priv->cm_id.ib = NULL;
1734                 cma_exch(id_priv, RDMA_CM_DESTROYING);
1735                 mutex_unlock(&id_priv->handler_mutex);
1736                 rdma_destroy_id(&id_priv->id);
1737                 return ret;
1738         }
1739 out:
1740         mutex_unlock(&id_priv->handler_mutex);
1741         return ret;
1742 }
1743
1744 static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
1745                                                struct ib_cm_event *ib_event,
1746                                                struct net_device *net_dev)
1747 {
1748         struct rdma_id_private *id_priv;
1749         struct rdma_cm_id *id;
1750         struct rdma_route *rt;
1751         const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
1752         const __be64 service_id =
1753                       ib_event->param.req_rcvd.primary_path->service_id;
1754         int ret;
1755
1756         id = rdma_create_id(listen_id->route.addr.dev_addr.net,
1757                             listen_id->event_handler, listen_id->context,
1758                             listen_id->ps, ib_event->param.req_rcvd.qp_type);
1759         if (IS_ERR(id))
1760                 return NULL;
1761
1762         id_priv = container_of(id, struct rdma_id_private, id);
1763         if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
1764                               (struct sockaddr *)&id->route.addr.dst_addr,
1765                               listen_id, ib_event, ss_family, service_id))
1766                 goto err;
1767
1768         rt = &id->route;
1769         rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
1770         rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
1771                                GFP_KERNEL);
1772         if (!rt->path_rec)
1773                 goto err;
1774
1775         rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
1776         if (rt->num_paths == 2)
1777                 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1778
1779         if (net_dev) {
1780                 ret = rdma_copy_addr(&rt->addr.dev_addr, net_dev, NULL);
1781                 if (ret)
1782                         goto err;
1783         } else {
1784                 if (!cma_protocol_roce(listen_id) &&
1785                     cma_any_addr(cma_src_addr(id_priv))) {
1786                         rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
1787                         rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
1788                         ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
1789                 } else if (!cma_any_addr(cma_src_addr(id_priv))) {
1790                         ret = cma_translate_addr(cma_src_addr(id_priv), &rt->addr.dev_addr);
1791                         if (ret)
1792                                 goto err;
1793                 }
1794         }
1795         rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
1796
1797         id_priv->state = RDMA_CM_CONNECT;
1798         return id_priv;
1799
1800 err:
1801         rdma_destroy_id(id);
1802         return NULL;
1803 }
1804
1805 static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
1806                                               struct ib_cm_event *ib_event,
1807                                               struct net_device *net_dev)
1808 {
1809         struct rdma_id_private *id_priv;
1810         struct rdma_cm_id *id;
1811         const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
1812         struct net *net = listen_id->route.addr.dev_addr.net;
1813         int ret;
1814
1815         id = rdma_create_id(net, listen_id->event_handler, listen_id->context,
1816                             listen_id->ps, IB_QPT_UD);
1817         if (IS_ERR(id))
1818                 return NULL;
1819
1820         id_priv = container_of(id, struct rdma_id_private, id);
1821         if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
1822                               (struct sockaddr *)&id->route.addr.dst_addr,
1823                               listen_id, ib_event, ss_family,
1824                               ib_event->param.sidr_req_rcvd.service_id))
1825                 goto err;
1826
1827         if (net_dev) {
1828                 ret = rdma_copy_addr(&id->route.addr.dev_addr, net_dev, NULL);
1829                 if (ret)
1830                         goto err;
1831         } else {
1832                 if (!cma_any_addr(cma_src_addr(id_priv))) {
1833                         ret = cma_translate_addr(cma_src_addr(id_priv),
1834                                                  &id->route.addr.dev_addr);
1835                         if (ret)
1836                                 goto err;
1837                 }
1838         }
1839
1840         id_priv->state = RDMA_CM_CONNECT;
1841         return id_priv;
1842 err:
1843         rdma_destroy_id(id);
1844         return NULL;
1845 }
1846
1847 static void cma_set_req_event_data(struct rdma_cm_event *event,
1848                                    struct ib_cm_req_event_param *req_data,
1849                                    void *private_data, int offset)
1850 {
1851         event->param.conn.private_data = private_data + offset;
1852         event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1853         event->param.conn.responder_resources = req_data->responder_resources;
1854         event->param.conn.initiator_depth = req_data->initiator_depth;
1855         event->param.conn.flow_control = req_data->flow_control;
1856         event->param.conn.retry_count = req_data->retry_count;
1857         event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1858         event->param.conn.srq = req_data->srq;
1859         event->param.conn.qp_num = req_data->remote_qpn;
1860 }
1861
1862 static int cma_check_req_qp_type(struct rdma_cm_id *id, struct ib_cm_event *ib_event)
1863 {
1864         return (((ib_event->event == IB_CM_REQ_RECEIVED) &&
1865                  (ib_event->param.req_rcvd.qp_type == id->qp_type)) ||
1866                 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) &&
1867                  (id->qp_type == IB_QPT_UD)) ||
1868                 (!id->qp_type));
1869 }
1870
1871 static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1872 {
1873         struct rdma_id_private *listen_id, *conn_id;
1874         struct rdma_cm_event event;
1875         struct net_device *net_dev;
1876         int offset, ret;
1877
1878         listen_id = cma_id_from_event(cm_id, ib_event, &net_dev);
1879         if (IS_ERR(listen_id))
1880                 return PTR_ERR(listen_id);
1881
1882         if (!cma_check_req_qp_type(&listen_id->id, ib_event)) {
1883                 ret = -EINVAL;
1884                 goto net_dev_put;
1885         }
1886
1887         if (cma_disable_callback(listen_id, RDMA_CM_LISTEN)) {
1888                 ret = -ECONNABORTED;
1889                 goto net_dev_put;
1890         }
1891
1892         memset(&event, 0, sizeof event);
1893         offset = cma_user_data_offset(listen_id);
1894         event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1895         if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) {
1896                 conn_id = cma_new_udp_id(&listen_id->id, ib_event, net_dev);
1897                 event.param.ud.private_data = ib_event->private_data + offset;
1898                 event.param.ud.private_data_len =
1899                                 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1900         } else {
1901                 conn_id = cma_new_conn_id(&listen_id->id, ib_event, net_dev);
1902                 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1903                                        ib_event->private_data, offset);
1904         }
1905         if (!conn_id) {
1906                 ret = -ENOMEM;
1907                 goto err1;
1908         }
1909
1910         mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
1911         ret = cma_acquire_dev(conn_id, listen_id);
1912         if (ret)
1913                 goto err2;
1914
1915         conn_id->cm_id.ib = cm_id;
1916         cm_id->context = conn_id;
1917         cm_id->cm_handler = cma_ib_handler;
1918
1919         /*
1920          * Protect against the user destroying conn_id from another thread
1921          * until we're done accessing it.
1922          */
1923         atomic_inc(&conn_id->refcount);
1924         ret = conn_id->id.event_handler(&conn_id->id, &event);
1925         if (ret)
1926                 goto err3;
1927         /*
1928          * Acquire mutex to prevent user executing rdma_destroy_id()
1929          * while we're accessing the cm_id.
1930          */
1931         mutex_lock(&lock);
1932         if (cma_comp(conn_id, RDMA_CM_CONNECT) &&
1933             (conn_id->id.qp_type != IB_QPT_UD))
1934                 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1935         mutex_unlock(&lock);
1936         mutex_unlock(&conn_id->handler_mutex);
1937         mutex_unlock(&listen_id->handler_mutex);
1938         cma_deref_id(conn_id);
1939         if (net_dev)
1940                 dev_put(net_dev);
1941         return 0;
1942
1943 err3:
1944         cma_deref_id(conn_id);
1945         /* Destroy the CM ID by returning a non-zero value. */
1946         conn_id->cm_id.ib = NULL;
1947 err2:
1948         cma_exch(conn_id, RDMA_CM_DESTROYING);
1949         mutex_unlock(&conn_id->handler_mutex);
1950 err1:
1951         mutex_unlock(&listen_id->handler_mutex);
1952         if (conn_id)
1953                 rdma_destroy_id(&conn_id->id);
1954
1955 net_dev_put:
1956         if (net_dev)
1957                 dev_put(net_dev);
1958
1959         return ret;
1960 }
1961
1962 __be64 rdma_get_service_id(struct rdma_cm_id *id, struct sockaddr *addr)
1963 {
1964         if (addr->sa_family == AF_IB)
1965                 return ((struct sockaddr_ib *) addr)->sib_sid;
1966
1967         return cpu_to_be64(((u64)id->ps << 16) + be16_to_cpu(cma_port(addr)));
1968 }
1969 EXPORT_SYMBOL(rdma_get_service_id);
1970
1971 static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
1972 {
1973         struct rdma_id_private *id_priv = iw_id->context;
1974         struct rdma_cm_event event;
1975         int ret = 0;
1976         struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
1977         struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
1978
1979         if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
1980                 return 0;
1981
1982         memset(&event, 0, sizeof event);
1983         switch (iw_event->event) {
1984         case IW_CM_EVENT_CLOSE:
1985                 event.event = RDMA_CM_EVENT_DISCONNECTED;
1986                 break;
1987         case IW_CM_EVENT_CONNECT_REPLY:
1988                 memcpy(cma_src_addr(id_priv), laddr,
1989                        rdma_addr_size(laddr));
1990                 memcpy(cma_dst_addr(id_priv), raddr,
1991                        rdma_addr_size(raddr));
1992                 switch (iw_event->status) {
1993                 case 0:
1994                         event.event = RDMA_CM_EVENT_ESTABLISHED;
1995                         event.param.conn.initiator_depth = iw_event->ird;
1996                         event.param.conn.responder_resources = iw_event->ord;
1997                         break;
1998                 case -ECONNRESET:
1999                 case -ECONNREFUSED:
2000                         event.event = RDMA_CM_EVENT_REJECTED;
2001                         break;
2002                 case -ETIMEDOUT:
2003                         event.event = RDMA_CM_EVENT_UNREACHABLE;
2004                         break;
2005                 default:
2006                         event.event = RDMA_CM_EVENT_CONNECT_ERROR;
2007                         break;
2008                 }
2009                 break;
2010         case IW_CM_EVENT_ESTABLISHED:
2011                 event.event = RDMA_CM_EVENT_ESTABLISHED;
2012                 event.param.conn.initiator_depth = iw_event->ird;
2013                 event.param.conn.responder_resources = iw_event->ord;
2014                 break;
2015         default:
2016                 BUG_ON(1);
2017         }
2018
2019         event.status = iw_event->status;
2020         event.param.conn.private_data = iw_event->private_data;
2021         event.param.conn.private_data_len = iw_event->private_data_len;
2022         ret = id_priv->id.event_handler(&id_priv->id, &event);
2023         if (ret) {
2024                 /* Destroy the CM ID by returning a non-zero value. */
2025                 id_priv->cm_id.iw = NULL;
2026                 cma_exch(id_priv, RDMA_CM_DESTROYING);
2027                 mutex_unlock(&id_priv->handler_mutex);
2028                 rdma_destroy_id(&id_priv->id);
2029                 return ret;
2030         }
2031
2032         mutex_unlock(&id_priv->handler_mutex);
2033         return ret;
2034 }
2035
2036 static int iw_conn_req_handler(struct iw_cm_id *cm_id,
2037                                struct iw_cm_event *iw_event)
2038 {
2039         struct rdma_cm_id *new_cm_id;
2040         struct rdma_id_private *listen_id, *conn_id;
2041         struct rdma_cm_event event;
2042         int ret;
2043         struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
2044         struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
2045
2046         listen_id = cm_id->context;
2047         if (cma_disable_callback(listen_id, RDMA_CM_LISTEN))
2048                 return -ECONNABORTED;
2049
2050         /* Create a new RDMA id for the new IW CM ID */
2051         new_cm_id = rdma_create_id(listen_id->id.route.addr.dev_addr.net,
2052                                    listen_id->id.event_handler,
2053                                    listen_id->id.context,
2054                                    RDMA_PS_TCP, IB_QPT_RC);
2055         if (IS_ERR(new_cm_id)) {
2056                 ret = -ENOMEM;
2057                 goto out;
2058         }
2059         conn_id = container_of(new_cm_id, struct rdma_id_private, id);
2060         mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
2061         conn_id->state = RDMA_CM_CONNECT;
2062
2063         ret = rdma_translate_ip(laddr, &conn_id->id.route.addr.dev_addr, NULL);
2064         if (ret) {
2065                 mutex_unlock(&conn_id->handler_mutex);
2066                 rdma_destroy_id(new_cm_id);
2067                 goto out;
2068         }
2069
2070         ret = cma_acquire_dev(conn_id, listen_id);
2071         if (ret) {
2072                 mutex_unlock(&conn_id->handler_mutex);
2073                 rdma_destroy_id(new_cm_id);
2074                 goto out;
2075         }
2076
2077         conn_id->cm_id.iw = cm_id;
2078         cm_id->context = conn_id;
2079         cm_id->cm_handler = cma_iw_handler;
2080
2081         memcpy(cma_src_addr(conn_id), laddr, rdma_addr_size(laddr));
2082         memcpy(cma_dst_addr(conn_id), raddr, rdma_addr_size(raddr));
2083
2084         memset(&event, 0, sizeof event);
2085         event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
2086         event.param.conn.private_data = iw_event->private_data;
2087         event.param.conn.private_data_len = iw_event->private_data_len;
2088         event.param.conn.initiator_depth = iw_event->ird;
2089         event.param.conn.responder_resources = iw_event->ord;
2090
2091         /*
2092          * Protect against the user destroying conn_id from another thread
2093          * until we're done accessing it.
2094          */
2095         atomic_inc(&conn_id->refcount);
2096         ret = conn_id->id.event_handler(&conn_id->id, &event);
2097         if (ret) {
2098                 /* User wants to destroy the CM ID */
2099                 conn_id->cm_id.iw = NULL;
2100                 cma_exch(conn_id, RDMA_CM_DESTROYING);
2101                 mutex_unlock(&conn_id->handler_mutex);
2102                 cma_deref_id(conn_id);
2103                 rdma_destroy_id(&conn_id->id);
2104                 goto out;
2105         }
2106
2107         mutex_unlock(&conn_id->handler_mutex);
2108         cma_deref_id(conn_id);
2109
2110 out:
2111         mutex_unlock(&listen_id->handler_mutex);
2112         return ret;
2113 }
2114
2115 static int cma_ib_listen(struct rdma_id_private *id_priv)
2116 {
2117         struct sockaddr *addr;
2118         struct ib_cm_id *id;
2119         __be64 svc_id;
2120
2121         addr = cma_src_addr(id_priv);
2122         svc_id = rdma_get_service_id(&id_priv->id, addr);
2123         id = ib_cm_insert_listen(id_priv->id.device, cma_req_handler, svc_id);
2124         if (IS_ERR(id))
2125                 return PTR_ERR(id);
2126         id_priv->cm_id.ib = id;
2127
2128         return 0;
2129 }
2130
2131 static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
2132 {
2133         int ret;
2134         struct iw_cm_id *id;
2135
2136         id = iw_create_cm_id(id_priv->id.device,
2137                              iw_conn_req_handler,
2138                              id_priv);
2139         if (IS_ERR(id))
2140                 return PTR_ERR(id);
2141
2142         id->tos = id_priv->tos;
2143         id_priv->cm_id.iw = id;
2144
2145         memcpy(&id_priv->cm_id.iw->local_addr, cma_src_addr(id_priv),
2146                rdma_addr_size(cma_src_addr(id_priv)));
2147
2148         ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
2149
2150         if (ret) {
2151                 iw_destroy_cm_id(id_priv->cm_id.iw);
2152                 id_priv->cm_id.iw = NULL;
2153         }
2154
2155         return ret;
2156 }
2157
2158 static int cma_listen_handler(struct rdma_cm_id *id,
2159                               struct rdma_cm_event *event)
2160 {
2161         struct rdma_id_private *id_priv = id->context;
2162
2163         id->context = id_priv->id.context;
2164         id->event_handler = id_priv->id.event_handler;
2165         return id_priv->id.event_handler(id, event);
2166 }
2167
2168 static void cma_listen_on_dev(struct rdma_id_private *id_priv,
2169                               struct cma_device *cma_dev)
2170 {
2171         struct rdma_id_private *dev_id_priv;
2172         struct rdma_cm_id *id;
2173         struct net *net = id_priv->id.route.addr.dev_addr.net;
2174         int ret;
2175
2176         if (cma_family(id_priv) == AF_IB && !rdma_cap_ib_cm(cma_dev->device, 1))
2177                 return;
2178
2179         id = rdma_create_id(net, cma_listen_handler, id_priv, id_priv->id.ps,
2180                             id_priv->id.qp_type);
2181         if (IS_ERR(id))
2182                 return;
2183
2184         dev_id_priv = container_of(id, struct rdma_id_private, id);
2185
2186         dev_id_priv->state = RDMA_CM_ADDR_BOUND;
2187         memcpy(cma_src_addr(dev_id_priv), cma_src_addr(id_priv),
2188                rdma_addr_size(cma_src_addr(id_priv)));
2189
2190         _cma_attach_to_dev(dev_id_priv, cma_dev);
2191         list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
2192         atomic_inc(&id_priv->refcount);
2193         dev_id_priv->internal_id = 1;
2194         dev_id_priv->afonly = id_priv->afonly;
2195
2196         ret = rdma_listen(id, id_priv->backlog);
2197         if (ret)
2198                 pr_warn("RDMA CMA: cma_listen_on_dev, error %d, listening on device %s\n",
2199                         ret, cma_dev->device->name);
2200 }
2201
2202 static void cma_listen_on_all(struct rdma_id_private *id_priv)
2203 {
2204         struct cma_device *cma_dev;
2205
2206         mutex_lock(&lock);
2207         list_add_tail(&id_priv->list, &listen_any_list);
2208         list_for_each_entry(cma_dev, &dev_list, list)
2209                 cma_listen_on_dev(id_priv, cma_dev);
2210         mutex_unlock(&lock);
2211 }
2212
2213 void rdma_set_service_type(struct rdma_cm_id *id, int tos)
2214 {
2215         struct rdma_id_private *id_priv;
2216
2217         id_priv = container_of(id, struct rdma_id_private, id);
2218         id_priv->tos = (u8) tos;
2219 }
2220 EXPORT_SYMBOL(rdma_set_service_type);
2221
2222 static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
2223                               void *context)
2224 {
2225         struct cma_work *work = context;
2226         struct rdma_route *route;
2227
2228         route = &work->id->id.route;
2229
2230         if (!status) {
2231                 route->num_paths = 1;
2232                 *route->path_rec = *path_rec;
2233         } else {
2234                 work->old_state = RDMA_CM_ROUTE_QUERY;
2235                 work->new_state = RDMA_CM_ADDR_RESOLVED;
2236                 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
2237                 work->event.status = status;
2238         }
2239
2240         queue_work(cma_wq, &work->work);
2241 }
2242
2243 static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
2244                               struct cma_work *work)
2245 {
2246         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2247         struct ib_sa_path_rec path_rec;
2248         ib_sa_comp_mask comp_mask;
2249         struct sockaddr_in6 *sin6;
2250         struct sockaddr_ib *sib;
2251
2252         memset(&path_rec, 0, sizeof path_rec);
2253         rdma_addr_get_sgid(dev_addr, &path_rec.sgid);
2254         rdma_addr_get_dgid(dev_addr, &path_rec.dgid);
2255         path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
2256         path_rec.numb_path = 1;
2257         path_rec.reversible = 1;
2258         path_rec.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
2259
2260         comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
2261                     IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
2262                     IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
2263
2264         switch (cma_family(id_priv)) {
2265         case AF_INET:
2266                 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
2267                 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
2268                 break;
2269         case AF_INET6:
2270                 sin6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
2271                 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
2272                 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
2273                 break;
2274         case AF_IB:
2275                 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
2276                 path_rec.traffic_class = (u8) (be32_to_cpu(sib->sib_flowinfo) >> 20);
2277                 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
2278                 break;
2279         }
2280
2281         id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
2282                                                id_priv->id.port_num, &path_rec,
2283                                                comp_mask, timeout_ms,
2284                                                GFP_KERNEL, cma_query_handler,
2285                                                work, &id_priv->query);
2286
2287         return (id_priv->query_id < 0) ? id_priv->query_id : 0;
2288 }
2289
2290 static void cma_work_handler(struct work_struct *_work)
2291 {
2292         struct cma_work *work = container_of(_work, struct cma_work, work);
2293         struct rdma_id_private *id_priv = work->id;
2294         int destroy = 0;
2295
2296         mutex_lock(&id_priv->handler_mutex);
2297         if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
2298                 goto out;
2299
2300         if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
2301                 cma_exch(id_priv, RDMA_CM_DESTROYING);
2302                 destroy = 1;
2303         }
2304 out:
2305         mutex_unlock(&id_priv->handler_mutex);
2306         cma_deref_id(id_priv);
2307         if (destroy)
2308                 rdma_destroy_id(&id_priv->id);
2309         kfree(work);
2310 }
2311
2312 static void cma_ndev_work_handler(struct work_struct *_work)
2313 {
2314         struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
2315         struct rdma_id_private *id_priv = work->id;
2316         int destroy = 0;
2317
2318         mutex_lock(&id_priv->handler_mutex);
2319         if (id_priv->state == RDMA_CM_DESTROYING ||
2320             id_priv->state == RDMA_CM_DEVICE_REMOVAL)
2321                 goto out;
2322
2323         if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
2324                 cma_exch(id_priv, RDMA_CM_DESTROYING);
2325                 destroy = 1;
2326         }
2327
2328 out:
2329         mutex_unlock(&id_priv->handler_mutex);
2330         cma_deref_id(id_priv);
2331         if (destroy)
2332                 rdma_destroy_id(&id_priv->id);
2333         kfree(work);
2334 }
2335
2336 static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
2337 {
2338         struct rdma_route *route = &id_priv->id.route;
2339         struct cma_work *work;
2340         int ret;
2341
2342         work = kzalloc(sizeof *work, GFP_KERNEL);
2343         if (!work)
2344                 return -ENOMEM;
2345
2346         work->id = id_priv;
2347         INIT_WORK(&work->work, cma_work_handler);
2348         work->old_state = RDMA_CM_ROUTE_QUERY;
2349         work->new_state = RDMA_CM_ROUTE_RESOLVED;
2350         work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2351
2352         route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
2353         if (!route->path_rec) {
2354                 ret = -ENOMEM;
2355                 goto err1;
2356         }
2357
2358         ret = cma_query_ib_route(id_priv, timeout_ms, work);
2359         if (ret)
2360                 goto err2;
2361
2362         return 0;
2363 err2:
2364         kfree(route->path_rec);
2365         route->path_rec = NULL;
2366 err1:
2367         kfree(work);
2368         return ret;
2369 }
2370
2371 int rdma_set_ib_paths(struct rdma_cm_id *id,
2372                       struct ib_sa_path_rec *path_rec, int num_paths)
2373 {
2374         struct rdma_id_private *id_priv;
2375         int ret;
2376
2377         id_priv = container_of(id, struct rdma_id_private, id);
2378         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2379                            RDMA_CM_ROUTE_RESOLVED))
2380                 return -EINVAL;
2381
2382         id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths,
2383                                      GFP_KERNEL);
2384         if (!id->route.path_rec) {
2385                 ret = -ENOMEM;
2386                 goto err;
2387         }
2388
2389         id->route.num_paths = num_paths;
2390         return 0;
2391 err:
2392         cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED);
2393         return ret;
2394 }
2395 EXPORT_SYMBOL(rdma_set_ib_paths);
2396
2397 static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
2398 {
2399         struct cma_work *work;
2400
2401         work = kzalloc(sizeof *work, GFP_KERNEL);
2402         if (!work)
2403                 return -ENOMEM;
2404
2405         work->id = id_priv;
2406         INIT_WORK(&work->work, cma_work_handler);
2407         work->old_state = RDMA_CM_ROUTE_QUERY;
2408         work->new_state = RDMA_CM_ROUTE_RESOLVED;
2409         work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2410         queue_work(cma_wq, &work->work);
2411         return 0;
2412 }
2413
2414 static int iboe_tos_to_sl(struct net_device *ndev, int tos)
2415 {
2416         int prio;
2417         struct net_device *dev;
2418
2419         prio = rt_tos2priority(tos);
2420         dev = ndev->priv_flags & IFF_802_1Q_VLAN ?
2421                 vlan_dev_real_dev(ndev) : ndev;
2422
2423         if (dev->num_tc)
2424                 return netdev_get_prio_tc_map(dev, prio);
2425
2426 #if IS_ENABLED(CONFIG_VLAN_8021Q)
2427         if (ndev->priv_flags & IFF_802_1Q_VLAN)
2428                 return (vlan_dev_get_egress_qos_mask(ndev, prio) &
2429                         VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
2430 #endif
2431         return 0;
2432 }
2433
2434 static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
2435 {
2436         struct rdma_route *route = &id_priv->id.route;
2437         struct rdma_addr *addr = &route->addr;
2438         struct cma_work *work;
2439         int ret;
2440         struct net_device *ndev = NULL;
2441
2442
2443         work = kzalloc(sizeof *work, GFP_KERNEL);
2444         if (!work)
2445                 return -ENOMEM;
2446
2447         work->id = id_priv;
2448         INIT_WORK(&work->work, cma_work_handler);
2449
2450         route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
2451         if (!route->path_rec) {
2452                 ret = -ENOMEM;
2453                 goto err1;
2454         }
2455
2456         route->num_paths = 1;
2457
2458         if (addr->dev_addr.bound_dev_if) {
2459                 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if);
2460                 if (!ndev)
2461                         return -ENODEV;
2462
2463                 if (ndev->flags & IFF_LOOPBACK) {
2464                         dev_put(ndev);
2465                         if (!id_priv->id.device->get_netdev)
2466                                 return -EOPNOTSUPP;
2467
2468                         ndev = id_priv->id.device->get_netdev(id_priv->id.device,
2469                                                               id_priv->id.port_num);
2470                         if (!ndev)
2471                                 return -ENODEV;
2472                 }
2473
2474                 route->path_rec->net = &init_net;
2475                 route->path_rec->ifindex = ndev->ifindex;
2476                 route->path_rec->gid_type = id_priv->gid_type;
2477         }
2478         if (!ndev) {
2479                 ret = -ENODEV;
2480                 goto err2;
2481         }
2482
2483         memcpy(route->path_rec->dmac, addr->dev_addr.dst_dev_addr, ETH_ALEN);
2484
2485         rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
2486                     &route->path_rec->sgid);
2487         rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.dst_addr,
2488                     &route->path_rec->dgid);
2489
2490         /* Use the hint from IP Stack to select GID Type */
2491         if (route->path_rec->gid_type < ib_network_to_gid_type(addr->dev_addr.network))
2492                 route->path_rec->gid_type = ib_network_to_gid_type(addr->dev_addr.network);
2493         if (((struct sockaddr *)&id_priv->id.route.addr.dst_addr)->sa_family != AF_IB)
2494                 /* TODO: get the hoplimit from the inet/inet6 device */
2495                 route->path_rec->hop_limit = addr->dev_addr.hoplimit;
2496         else
2497                 route->path_rec->hop_limit = 1;
2498         route->path_rec->reversible = 1;
2499         route->path_rec->pkey = cpu_to_be16(0xffff);
2500         route->path_rec->mtu_selector = IB_SA_EQ;
2501         route->path_rec->sl = iboe_tos_to_sl(ndev, id_priv->tos);
2502         route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
2503         route->path_rec->rate_selector = IB_SA_EQ;
2504         route->path_rec->rate = iboe_get_rate(ndev);
2505         dev_put(ndev);
2506         route->path_rec->packet_life_time_selector = IB_SA_EQ;
2507         route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
2508         if (!route->path_rec->mtu) {
2509                 ret = -EINVAL;
2510                 goto err2;
2511         }
2512
2513         work->old_state = RDMA_CM_ROUTE_QUERY;
2514         work->new_state = RDMA_CM_ROUTE_RESOLVED;
2515         work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2516         work->event.status = 0;
2517
2518         queue_work(cma_wq, &work->work);
2519
2520         return 0;
2521
2522 err2:
2523         kfree(route->path_rec);
2524         route->path_rec = NULL;
2525 err1:
2526         kfree(work);
2527         return ret;
2528 }
2529
2530 int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
2531 {
2532         struct rdma_id_private *id_priv;
2533         int ret;
2534
2535         id_priv = container_of(id, struct rdma_id_private, id);
2536         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY))
2537                 return -EINVAL;
2538
2539         atomic_inc(&id_priv->refcount);
2540         if (rdma_cap_ib_sa(id->device, id->port_num))
2541                 ret = cma_resolve_ib_route(id_priv, timeout_ms);
2542         else if (rdma_protocol_roce(id->device, id->port_num))
2543                 ret = cma_resolve_iboe_route(id_priv);
2544         else if (rdma_protocol_iwarp(id->device, id->port_num))
2545                 ret = cma_resolve_iw_route(id_priv, timeout_ms);
2546         else
2547                 ret = -ENOSYS;
2548
2549         if (ret)
2550                 goto err;
2551
2552         return 0;
2553 err:
2554         cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED);
2555         cma_deref_id(id_priv);
2556         return ret;
2557 }
2558 EXPORT_SYMBOL(rdma_resolve_route);
2559
2560 static void cma_set_loopback(struct sockaddr *addr)
2561 {
2562         switch (addr->sa_family) {
2563         case AF_INET:
2564                 ((struct sockaddr_in *) addr)->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
2565                 break;
2566         case AF_INET6:
2567                 ipv6_addr_set(&((struct sockaddr_in6 *) addr)->sin6_addr,
2568                               0, 0, 0, htonl(1));
2569                 break;
2570         default:
2571                 ib_addr_set(&((struct sockaddr_ib *) addr)->sib_addr,
2572                             0, 0, 0, htonl(1));
2573                 break;
2574         }
2575 }
2576
2577 static int cma_bind_loopback(struct rdma_id_private *id_priv)
2578 {
2579         struct cma_device *cma_dev, *cur_dev;
2580         struct ib_port_attr port_attr;
2581         union ib_gid gid;
2582         u16 pkey;
2583         int ret;
2584         u8 p;
2585
2586         cma_dev = NULL;
2587         mutex_lock(&lock);
2588         list_for_each_entry(cur_dev, &dev_list, list) {
2589                 if (cma_family(id_priv) == AF_IB &&
2590                     !rdma_cap_ib_cm(cur_dev->device, 1))
2591                         continue;
2592
2593                 if (!cma_dev)
2594                         cma_dev = cur_dev;
2595
2596                 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
2597                         if (!ib_query_port(cur_dev->device, p, &port_attr) &&
2598                             port_attr.state == IB_PORT_ACTIVE) {
2599                                 cma_dev = cur_dev;
2600                                 goto port_found;
2601                         }
2602                 }
2603         }
2604
2605         if (!cma_dev) {
2606                 ret = -ENODEV;
2607                 goto out;
2608         }
2609
2610         p = 1;
2611
2612 port_found:
2613         ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid, NULL);
2614         if (ret)
2615                 goto out;
2616
2617         ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
2618         if (ret)
2619                 goto out;
2620
2621         id_priv->id.route.addr.dev_addr.dev_type =
2622                 (rdma_protocol_ib(cma_dev->device, p)) ?
2623                 ARPHRD_INFINIBAND : ARPHRD_ETHER;
2624
2625         rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2626         ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
2627         id_priv->id.port_num = p;
2628         cma_attach_to_dev(id_priv, cma_dev);
2629         cma_set_loopback(cma_src_addr(id_priv));
2630 out:
2631         mutex_unlock(&lock);
2632         return ret;
2633 }
2634
2635 static void addr_handler(int status, struct sockaddr *src_addr,
2636                          struct rdma_dev_addr *dev_addr, void *context)
2637 {
2638         struct rdma_id_private *id_priv = context;
2639         struct rdma_cm_event event;
2640
2641         memset(&event, 0, sizeof event);
2642         mutex_lock(&id_priv->handler_mutex);
2643         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY,
2644                            RDMA_CM_ADDR_RESOLVED))
2645                 goto out;
2646
2647         memcpy(cma_src_addr(id_priv), src_addr, rdma_addr_size(src_addr));
2648         if (!status && !id_priv->cma_dev)
2649                 status = cma_acquire_dev(id_priv, NULL);
2650
2651         if (status) {
2652                 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2653                                    RDMA_CM_ADDR_BOUND))
2654                         goto out;
2655                 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2656                 event.status = status;
2657         } else
2658                 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2659
2660         if (id_priv->id.event_handler(&id_priv->id, &event)) {
2661                 cma_exch(id_priv, RDMA_CM_DESTROYING);
2662                 mutex_unlock(&id_priv->handler_mutex);
2663                 cma_deref_id(id_priv);
2664                 rdma_destroy_id(&id_priv->id);
2665                 return;
2666         }
2667 out:
2668         mutex_unlock(&id_priv->handler_mutex);
2669         cma_deref_id(id_priv);
2670 }
2671
2672 static int cma_resolve_loopback(struct rdma_id_private *id_priv)
2673 {
2674         struct cma_work *work;
2675         union ib_gid gid;
2676         int ret;
2677
2678         work = kzalloc(sizeof *work, GFP_KERNEL);
2679         if (!work)
2680                 return -ENOMEM;
2681
2682         if (!id_priv->cma_dev) {
2683                 ret = cma_bind_loopback(id_priv);
2684                 if (ret)
2685                         goto err;
2686         }
2687
2688         rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2689         rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
2690
2691         work->id = id_priv;
2692         INIT_WORK(&work->work, cma_work_handler);
2693         work->old_state = RDMA_CM_ADDR_QUERY;
2694         work->new_state = RDMA_CM_ADDR_RESOLVED;
2695         work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2696         queue_work(cma_wq, &work->work);
2697         return 0;
2698 err:
2699         kfree(work);
2700         return ret;
2701 }
2702
2703 static int cma_resolve_ib_addr(struct rdma_id_private *id_priv)
2704 {
2705         struct cma_work *work;
2706         int ret;
2707
2708         work = kzalloc(sizeof *work, GFP_KERNEL);
2709         if (!work)
2710                 return -ENOMEM;
2711
2712         if (!id_priv->cma_dev) {
2713                 ret = cma_resolve_ib_dev(id_priv);
2714                 if (ret)
2715                         goto err;
2716         }
2717
2718         rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, (union ib_gid *)
2719                 &(((struct sockaddr_ib *) &id_priv->id.route.addr.dst_addr)->sib_addr));
2720
2721         work->id = id_priv;
2722         INIT_WORK(&work->work, cma_work_handler);
2723         work->old_state = RDMA_CM_ADDR_QUERY;
2724         work->new_state = RDMA_CM_ADDR_RESOLVED;
2725         work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2726         queue_work(cma_wq, &work->work);
2727         return 0;
2728 err:
2729         kfree(work);
2730         return ret;
2731 }
2732
2733 static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2734                          struct sockaddr *dst_addr)
2735 {
2736         if (!src_addr || !src_addr->sa_family) {
2737                 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
2738                 src_addr->sa_family = dst_addr->sa_family;
2739                 if (dst_addr->sa_family == AF_INET6) {
2740                         struct sockaddr_in6 *src_addr6 = (struct sockaddr_in6 *) src_addr;
2741                         struct sockaddr_in6 *dst_addr6 = (struct sockaddr_in6 *) dst_addr;
2742                         src_addr6->sin6_scope_id = dst_addr6->sin6_scope_id;
2743                         if (ipv6_addr_type(&dst_addr6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
2744                                 id->route.addr.dev_addr.bound_dev_if = dst_addr6->sin6_scope_id;
2745                 } else if (dst_addr->sa_family == AF_IB) {
2746                         ((struct sockaddr_ib *) src_addr)->sib_pkey =
2747                                 ((struct sockaddr_ib *) dst_addr)->sib_pkey;
2748                 }
2749         }
2750         return rdma_bind_addr(id, src_addr);
2751 }
2752
2753 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2754                       struct sockaddr *dst_addr, int timeout_ms)
2755 {
2756         struct rdma_id_private *id_priv;
2757         int ret;
2758
2759         id_priv = container_of(id, struct rdma_id_private, id);
2760         if (id_priv->state == RDMA_CM_IDLE) {
2761                 ret = cma_bind_addr(id, src_addr, dst_addr);
2762                 if (ret)
2763                         return ret;
2764         }
2765
2766         if (cma_family(id_priv) != dst_addr->sa_family)
2767                 return -EINVAL;
2768
2769         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY))
2770                 return -EINVAL;
2771
2772         atomic_inc(&id_priv->refcount);
2773         memcpy(cma_dst_addr(id_priv), dst_addr, rdma_addr_size(dst_addr));
2774         if (cma_any_addr(dst_addr)) {
2775                 ret = cma_resolve_loopback(id_priv);
2776         } else {
2777                 if (dst_addr->sa_family == AF_IB) {
2778                         ret = cma_resolve_ib_addr(id_priv);
2779                 } else {
2780                         ret = rdma_resolve_ip(&addr_client, cma_src_addr(id_priv),
2781                                               dst_addr, &id->route.addr.dev_addr,
2782                                               timeout_ms, addr_handler, id_priv);
2783                 }
2784         }
2785         if (ret)
2786                 goto err;
2787
2788         return 0;
2789 err:
2790         cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
2791         cma_deref_id(id_priv);
2792         return ret;
2793 }
2794 EXPORT_SYMBOL(rdma_resolve_addr);
2795
2796 int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
2797 {
2798         struct rdma_id_private *id_priv;
2799         unsigned long flags;
2800         int ret;
2801
2802         id_priv = container_of(id, struct rdma_id_private, id);
2803         spin_lock_irqsave(&id_priv->lock, flags);
2804         if (reuse || id_priv->state == RDMA_CM_IDLE) {
2805                 id_priv->reuseaddr = reuse;
2806                 ret = 0;
2807         } else {
2808                 ret = -EINVAL;
2809         }
2810         spin_unlock_irqrestore(&id_priv->lock, flags);
2811         return ret;
2812 }
2813 EXPORT_SYMBOL(rdma_set_reuseaddr);
2814
2815 int rdma_set_afonly(struct rdma_cm_id *id, int afonly)
2816 {
2817         struct rdma_id_private *id_priv;
2818         unsigned long flags;
2819         int ret;
2820
2821         id_priv = container_of(id, struct rdma_id_private, id);
2822         spin_lock_irqsave(&id_priv->lock, flags);
2823         if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) {
2824                 id_priv->options |= (1 << CMA_OPTION_AFONLY);
2825                 id_priv->afonly = afonly;
2826                 ret = 0;
2827         } else {
2828                 ret = -EINVAL;
2829         }
2830         spin_unlock_irqrestore(&id_priv->lock, flags);
2831         return ret;
2832 }
2833 EXPORT_SYMBOL(rdma_set_afonly);
2834
2835 static void cma_bind_port(struct rdma_bind_list *bind_list,
2836                           struct rdma_id_private *id_priv)
2837 {
2838         struct sockaddr *addr;
2839         struct sockaddr_ib *sib;
2840         u64 sid, mask;
2841         __be16 port;
2842
2843         addr = cma_src_addr(id_priv);
2844         port = htons(bind_list->port);
2845
2846         switch (addr->sa_family) {
2847         case AF_INET:
2848                 ((struct sockaddr_in *) addr)->sin_port = port;
2849                 break;
2850         case AF_INET6:
2851                 ((struct sockaddr_in6 *) addr)->sin6_port = port;
2852                 break;
2853         case AF_IB:
2854                 sib = (struct sockaddr_ib *) addr;
2855                 sid = be64_to_cpu(sib->sib_sid);
2856                 mask = be64_to_cpu(sib->sib_sid_mask);
2857                 sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port));
2858                 sib->sib_sid_mask = cpu_to_be64(~0ULL);
2859                 break;
2860         }
2861         id_priv->bind_list = bind_list;
2862         hlist_add_head(&id_priv->node, &bind_list->owners);
2863 }
2864
2865 static int cma_alloc_port(enum rdma_port_space ps,
2866                           struct rdma_id_private *id_priv, unsigned short snum)
2867 {
2868         struct rdma_bind_list *bind_list;
2869         int ret;
2870
2871         bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
2872         if (!bind_list)
2873                 return -ENOMEM;
2874
2875         ret = cma_ps_alloc(id_priv->id.route.addr.dev_addr.net, ps, bind_list,
2876                            snum);
2877         if (ret < 0)
2878                 goto err;
2879
2880         bind_list->ps = ps;
2881         bind_list->port = (unsigned short)ret;
2882         cma_bind_port(bind_list, id_priv);
2883         return 0;
2884 err:
2885         kfree(bind_list);
2886         return ret == -ENOSPC ? -EADDRNOTAVAIL : ret;
2887 }
2888
2889 static int cma_alloc_any_port(enum rdma_port_space ps,
2890                               struct rdma_id_private *id_priv)
2891 {
2892         static unsigned int last_used_port;
2893         int low, high, remaining;
2894         unsigned int rover;
2895         struct net *net = id_priv->id.route.addr.dev_addr.net;
2896
2897         inet_get_local_port_range(net, &low, &high);
2898         remaining = (high - low) + 1;
2899         rover = prandom_u32() % remaining + low;
2900 retry:
2901         if (last_used_port != rover &&
2902             !cma_ps_find(net, ps, (unsigned short)rover)) {
2903                 int ret = cma_alloc_port(ps, id_priv, rover);
2904                 /*
2905                  * Remember previously used port number in order to avoid
2906                  * re-using same port immediately after it is closed.
2907                  */
2908                 if (!ret)
2909                         last_used_port = rover;
2910                 if (ret != -EADDRNOTAVAIL)
2911                         return ret;
2912         }
2913         if (--remaining) {
2914                 rover++;
2915                 if ((rover < low) || (rover > high))
2916                         rover = low;
2917                 goto retry;
2918         }
2919         return -EADDRNOTAVAIL;
2920 }
2921
2922 /*
2923  * Check that the requested port is available.  This is called when trying to
2924  * bind to a specific port, or when trying to listen on a bound port.  In
2925  * the latter case, the provided id_priv may already be on the bind_list, but
2926  * we still need to check that it's okay to start listening.
2927  */
2928 static int cma_check_port(struct rdma_bind_list *bind_list,
2929                           struct rdma_id_private *id_priv, uint8_t reuseaddr)
2930 {
2931         struct rdma_id_private *cur_id;
2932         struct sockaddr *addr, *cur_addr;
2933
2934         addr = cma_src_addr(id_priv);
2935         hlist_for_each_entry(cur_id, &bind_list->owners, node) {
2936                 if (id_priv == cur_id)
2937                         continue;
2938
2939                 if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr &&
2940                     cur_id->reuseaddr)
2941                         continue;
2942
2943                 cur_addr = cma_src_addr(cur_id);
2944                 if (id_priv->afonly && cur_id->afonly &&
2945                     (addr->sa_family != cur_addr->sa_family))
2946                         continue;
2947
2948                 if (cma_any_addr(addr) || cma_any_addr(cur_addr))
2949                         return -EADDRNOTAVAIL;
2950
2951                 if (!cma_addr_cmp(addr, cur_addr))
2952                         return -EADDRINUSE;
2953         }
2954         return 0;
2955 }
2956
2957 static int cma_use_port(enum rdma_port_space ps,
2958                         struct rdma_id_private *id_priv)
2959 {
2960         struct rdma_bind_list *bind_list;
2961         unsigned short snum;
2962         int ret;
2963
2964         snum = ntohs(cma_port(cma_src_addr(id_priv)));
2965         if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
2966                 return -EACCES;
2967
2968         bind_list = cma_ps_find(id_priv->id.route.addr.dev_addr.net, ps, snum);
2969         if (!bind_list) {
2970                 ret = cma_alloc_port(ps, id_priv, snum);
2971         } else {
2972                 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
2973                 if (!ret)
2974                         cma_bind_port(bind_list, id_priv);
2975         }
2976         return ret;
2977 }
2978
2979 static int cma_bind_listen(struct rdma_id_private *id_priv)
2980 {
2981         struct rdma_bind_list *bind_list = id_priv->bind_list;
2982         int ret = 0;
2983
2984         mutex_lock(&lock);
2985         if (bind_list->owners.first->next)
2986                 ret = cma_check_port(bind_list, id_priv, 0);
2987         mutex_unlock(&lock);
2988         return ret;
2989 }
2990
2991 static enum rdma_port_space cma_select_inet_ps(
2992                 struct rdma_id_private *id_priv)
2993 {
2994         switch (id_priv->id.ps) {
2995         case RDMA_PS_TCP:
2996         case RDMA_PS_UDP:
2997         case RDMA_PS_IPOIB:
2998         case RDMA_PS_IB:
2999                 return id_priv->id.ps;
3000         default:
3001
3002                 return 0;
3003         }
3004 }
3005
3006 static enum rdma_port_space cma_select_ib_ps(struct rdma_id_private *id_priv)
3007 {
3008         enum rdma_port_space ps = 0;
3009         struct sockaddr_ib *sib;
3010         u64 sid_ps, mask, sid;
3011
3012         sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
3013         mask = be64_to_cpu(sib->sib_sid_mask) & RDMA_IB_IP_PS_MASK;
3014         sid = be64_to_cpu(sib->sib_sid) & mask;
3015
3016         if ((id_priv->id.ps == RDMA_PS_IB) && (sid == (RDMA_IB_IP_PS_IB & mask))) {
3017                 sid_ps = RDMA_IB_IP_PS_IB;
3018                 ps = RDMA_PS_IB;
3019         } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_TCP)) &&
3020                    (sid == (RDMA_IB_IP_PS_TCP & mask))) {
3021                 sid_ps = RDMA_IB_IP_PS_TCP;
3022                 ps = RDMA_PS_TCP;
3023         } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_UDP)) &&
3024                    (sid == (RDMA_IB_IP_PS_UDP & mask))) {
3025                 sid_ps = RDMA_IB_IP_PS_UDP;
3026                 ps = RDMA_PS_UDP;
3027         }
3028
3029         if (ps) {
3030                 sib->sib_sid = cpu_to_be64(sid_ps | ntohs(cma_port((struct sockaddr *) sib)));
3031                 sib->sib_sid_mask = cpu_to_be64(RDMA_IB_IP_PS_MASK |
3032                                                 be64_to_cpu(sib->sib_sid_mask));
3033         }
3034         return ps;
3035 }
3036
3037 static int cma_get_port(struct rdma_id_private *id_priv)
3038 {
3039         enum rdma_port_space ps;
3040         int ret;
3041
3042         if (cma_family(id_priv) != AF_IB)
3043                 ps = cma_select_inet_ps(id_priv);
3044         else
3045                 ps = cma_select_ib_ps(id_priv);
3046         if (!ps)
3047                 return -EPROTONOSUPPORT;
3048
3049         mutex_lock(&lock);
3050         if (cma_any_port(cma_src_addr(id_priv)))
3051                 ret = cma_alloc_any_port(ps, id_priv);
3052         else
3053                 ret = cma_use_port(ps, id_priv);
3054         mutex_unlock(&lock);
3055
3056         return ret;
3057 }
3058
3059 static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
3060                                struct sockaddr *addr)
3061 {
3062 #if IS_ENABLED(CONFIG_IPV6)
3063         struct sockaddr_in6 *sin6;
3064
3065         if (addr->sa_family != AF_INET6)
3066                 return 0;
3067
3068         sin6 = (struct sockaddr_in6 *) addr;
3069
3070         if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL))
3071                 return 0;
3072
3073         if (!sin6->sin6_scope_id)
3074                         return -EINVAL;
3075
3076         dev_addr->bound_dev_if = sin6->sin6_scope_id;
3077 #endif
3078         return 0;
3079 }
3080
3081 int rdma_listen(struct rdma_cm_id *id, int backlog)
3082 {
3083         struct rdma_id_private *id_priv;
3084         int ret;
3085
3086         id_priv = container_of(id, struct rdma_id_private, id);
3087         if (id_priv->state == RDMA_CM_IDLE) {
3088                 id->route.addr.src_addr.ss_family = AF_INET;
3089                 ret = rdma_bind_addr(id, cma_src_addr(id_priv));
3090                 if (ret)
3091                         return ret;
3092         }
3093
3094         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN))
3095                 return -EINVAL;
3096
3097         if (id_priv->reuseaddr) {
3098                 ret = cma_bind_listen(id_priv);
3099                 if (ret)
3100                         goto err;
3101         }
3102
3103         id_priv->backlog = backlog;
3104         if (id->device) {
3105                 if (rdma_cap_ib_cm(id->device, 1)) {
3106                         ret = cma_ib_listen(id_priv);
3107                         if (ret)
3108                                 goto err;
3109                 } else if (rdma_cap_iw_cm(id->device, 1)) {
3110                         ret = cma_iw_listen(id_priv, backlog);
3111                         if (ret)
3112                                 goto err;
3113                 } else {
3114                         ret = -ENOSYS;
3115                         goto err;
3116                 }
3117         } else
3118                 cma_listen_on_all(id_priv);
3119
3120         return 0;
3121 err:
3122         id_priv->backlog = 0;
3123         cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND);
3124         return ret;
3125 }
3126 EXPORT_SYMBOL(rdma_listen);
3127
3128 int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
3129 {
3130         struct rdma_id_private *id_priv;
3131         int ret;
3132
3133         if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6 &&
3134             addr->sa_family != AF_IB)
3135                 return -EAFNOSUPPORT;
3136
3137         id_priv = container_of(id, struct rdma_id_private, id);
3138         if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND))
3139                 return -EINVAL;
3140
3141         ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
3142         if (ret)
3143                 goto err1;
3144
3145         memcpy(cma_src_addr(id_priv), addr, rdma_addr_size(addr));
3146         if (!cma_any_addr(addr)) {
3147                 ret = cma_translate_addr(addr, &id->route.addr.dev_addr);
3148                 if (ret)
3149                         goto err1;
3150
3151                 ret = cma_acquire_dev(id_priv, NULL);
3152                 if (ret)
3153                         goto err1;
3154         }
3155
3156         if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) {
3157                 if (addr->sa_family == AF_INET)
3158                         id_priv->afonly = 1;
3159 #if IS_ENABLED(CONFIG_IPV6)
3160                 else if (addr->sa_family == AF_INET6) {
3161                         struct net *net = id_priv->id.route.addr.dev_addr.net;
3162
3163                         id_priv->afonly = net->ipv6.sysctl.bindv6only;
3164                 }
3165 #endif
3166         }
3167         ret = cma_get_port(id_priv);
3168         if (ret)
3169                 goto err2;
3170
3171         return 0;
3172 err2:
3173         if (id_priv->cma_dev)
3174                 cma_release_dev(id_priv);
3175 err1:
3176         cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE);
3177         return ret;
3178 }
3179 EXPORT_SYMBOL(rdma_bind_addr);
3180
3181 static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv)
3182 {
3183         struct cma_hdr *cma_hdr;
3184
3185         cma_hdr = hdr;
3186         cma_hdr->cma_version = CMA_VERSION;
3187         if (cma_family(id_priv) == AF_INET) {
3188                 struct sockaddr_in *src4, *dst4;
3189
3190                 src4 = (struct sockaddr_in *) cma_src_addr(id_priv);
3191                 dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv);
3192
3193                 cma_set_ip_ver(cma_hdr, 4);
3194                 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
3195                 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
3196                 cma_hdr->port = src4->sin_port;
3197         } else if (cma_family(id_priv) == AF_INET6) {
3198                 struct sockaddr_in6 *src6, *dst6;
3199
3200                 src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
3201                 dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv);
3202
3203                 cma_set_ip_ver(cma_hdr, 6);
3204                 cma_hdr->src_addr.ip6 = src6->sin6_addr;
3205                 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
3206                 cma_hdr->port = src6->sin6_port;
3207         }
3208         return 0;
3209 }
3210
3211 static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
3212                                 struct ib_cm_event *ib_event)
3213 {
3214         struct rdma_id_private *id_priv = cm_id->context;
3215         struct rdma_cm_event event;
3216         struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
3217         int ret = 0;
3218
3219         if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
3220                 return 0;
3221
3222         memset(&event, 0, sizeof event);
3223         switch (ib_event->event) {
3224         case IB_CM_SIDR_REQ_ERROR:
3225                 event.event = RDMA_CM_EVENT_UNREACHABLE;
3226                 event.status = -ETIMEDOUT;
3227                 break;
3228         case IB_CM_SIDR_REP_RECEIVED:
3229                 event.param.ud.private_data = ib_event->private_data;
3230                 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
3231                 if (rep->status != IB_SIDR_SUCCESS) {
3232                         event.event = RDMA_CM_EVENT_UNREACHABLE;
3233                         event.status = ib_event->param.sidr_rep_rcvd.status;
3234                         break;
3235                 }
3236                 ret = cma_set_qkey(id_priv, rep->qkey);
3237                 if (ret) {
3238                         event.event = RDMA_CM_EVENT_ADDR_ERROR;
3239                         event.status = ret;
3240                         break;
3241                 }
3242                 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
3243                                      id_priv->id.route.path_rec,
3244                                      &event.param.ud.ah_attr);
3245                 event.param.ud.qp_num = rep->qpn;
3246                 event.param.ud.qkey = rep->qkey;
3247                 event.event = RDMA_CM_EVENT_ESTABLISHED;
3248                 event.status = 0;
3249                 break;
3250         default:
3251                 pr_err("RDMA CMA: unexpected IB CM event: %d\n",
3252                        ib_event->event);
3253                 goto out;
3254         }
3255
3256         ret = id_priv->id.event_handler(&id_priv->id, &event);
3257         if (ret) {
3258                 /* Destroy the CM ID by returning a non-zero value. */
3259                 id_priv->cm_id.ib = NULL;
3260                 cma_exch(id_priv, RDMA_CM_DESTROYING);
3261                 mutex_unlock(&id_priv->handler_mutex);
3262                 rdma_destroy_id(&id_priv->id);
3263                 return ret;
3264         }
3265 out:
3266         mutex_unlock(&id_priv->handler_mutex);
3267         return ret;
3268 }
3269
3270 static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
3271                               struct rdma_conn_param *conn_param)
3272 {
3273         struct ib_cm_sidr_req_param req;
3274         struct ib_cm_id *id;
3275         void *private_data;
3276         int offset, ret;
3277
3278         memset(&req, 0, sizeof req);
3279         offset = cma_user_data_offset(id_priv);
3280         req.private_data_len = offset + conn_param->private_data_len;
3281         if (req.private_data_len < conn_param->private_data_len)
3282                 return -EINVAL;
3283
3284         if (req.private_data_len) {
3285                 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
3286                 if (!private_data)
3287                         return -ENOMEM;
3288         } else {
3289                 private_data = NULL;
3290         }
3291
3292         if (conn_param->private_data && conn_param->private_data_len)
3293                 memcpy(private_data + offset, conn_param->private_data,
3294                        conn_param->private_data_len);
3295
3296         if (private_data) {
3297                 ret = cma_format_hdr(private_data, id_priv);
3298                 if (ret)
3299                         goto out;
3300                 req.private_data = private_data;
3301         }
3302
3303         id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler,
3304                              id_priv);
3305         if (IS_ERR(id)) {
3306                 ret = PTR_ERR(id);
3307                 goto out;
3308         }
3309         id_priv->cm_id.ib = id;
3310
3311         req.path = id_priv->id.route.path_rec;
3312         req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
3313         req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
3314         req.max_cm_retries = CMA_MAX_CM_RETRIES;
3315
3316         ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
3317         if (ret) {
3318                 ib_destroy_cm_id(id_priv->cm_id.ib);
3319                 id_priv->cm_id.ib = NULL;
3320         }
3321 out:
3322         kfree(private_data);
3323         return ret;
3324 }
3325
3326 static int cma_connect_ib(struct rdma_id_private *id_priv,
3327                           struct rdma_conn_param *conn_param)
3328 {
3329         struct ib_cm_req_param req;
3330         struct rdma_route *route;
3331         void *private_data;
3332         struct ib_cm_id *id;
3333         int offset, ret;
3334
3335         memset(&req, 0, sizeof req);
3336         offset = cma_user_data_offset(id_priv);
3337         req.private_data_len = offset + conn_param->private_data_len;
3338         if (req.private_data_len < conn_param->private_data_len)
3339                 return -EINVAL;
3340
3341         if (req.private_data_len) {
3342                 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
3343                 if (!private_data)
3344                         return -ENOMEM;
3345         } else {
3346                 private_data = NULL;
3347         }
3348
3349         if (conn_param->private_data && conn_param->private_data_len)
3350                 memcpy(private_data + offset, conn_param->private_data,
3351                        conn_param->private_data_len);
3352
3353         id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv);
3354         if (IS_ERR(id)) {
3355                 ret = PTR_ERR(id);
3356                 goto out;
3357         }
3358         id_priv->cm_id.ib = id;
3359
3360         route = &id_priv->id.route;
3361         if (private_data) {
3362                 ret = cma_format_hdr(private_data, id_priv);
3363                 if (ret)
3364                         goto out;
3365                 req.private_data = private_data;
3366         }
3367
3368         req.primary_path = &route->path_rec[0];
3369         if (route->num_paths == 2)
3370                 req.alternate_path = &route->path_rec[1];
3371
3372         req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
3373         req.qp_num = id_priv->qp_num;
3374         req.qp_type = id_priv->id.qp_type;
3375         req.starting_psn = id_priv->seq_num;
3376         req.responder_resources = conn_param->responder_resources;
3377         req.initiator_depth = conn_param->initiator_depth;
3378         req.flow_control = conn_param->flow_control;
3379         req.retry_count = min_t(u8, 7, conn_param->retry_count);
3380         req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
3381         req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
3382         req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
3383         req.max_cm_retries = CMA_MAX_CM_RETRIES;
3384         req.srq = id_priv->srq ? 1 : 0;
3385
3386         ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
3387 out:
3388         if (ret && !IS_ERR(id)) {
3389                 ib_destroy_cm_id(id);
3390                 id_priv->cm_id.ib = NULL;
3391         }
3392
3393         kfree(private_data);
3394         return ret;
3395 }
3396
3397 static int cma_connect_iw(struct rdma_id_private *id_priv,
3398                           struct rdma_conn_param *conn_param)
3399 {
3400         struct iw_cm_id *cm_id;
3401         int ret;
3402         struct iw_cm_conn_param iw_param;
3403
3404         cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
3405         if (IS_ERR(cm_id))
3406                 return PTR_ERR(cm_id);
3407
3408         cm_id->tos = id_priv->tos;
3409         id_priv->cm_id.iw = cm_id;
3410
3411         memcpy(&cm_id->local_addr, cma_src_addr(id_priv),
3412                rdma_addr_size(cma_src_addr(id_priv)));
3413         memcpy(&cm_id->remote_addr, cma_dst_addr(id_priv),
3414                rdma_addr_size(cma_dst_addr(id_priv)));
3415
3416         ret = cma_modify_qp_rtr(id_priv, conn_param);
3417         if (ret)
3418                 goto out;
3419
3420         if (conn_param) {
3421                 iw_param.ord = conn_param->initiator_depth;
3422                 iw_param.ird = conn_param->responder_resources;
3423                 iw_param.private_data = conn_param->private_data;
3424                 iw_param.private_data_len = conn_param->private_data_len;
3425                 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num;
3426         } else {
3427                 memset(&iw_param, 0, sizeof iw_param);
3428                 iw_param.qpn = id_priv->qp_num;
3429         }
3430         ret = iw_cm_connect(cm_id, &iw_param);
3431 out:
3432         if (ret) {
3433                 iw_destroy_cm_id(cm_id);
3434                 id_priv->cm_id.iw = NULL;
3435         }
3436         return ret;
3437 }
3438
3439 int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
3440 {
3441         struct rdma_id_private *id_priv;
3442         int ret;
3443
3444         id_priv = container_of(id, struct rdma_id_private, id);
3445         if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT))
3446                 return -EINVAL;
3447
3448         if (!id->qp) {
3449                 id_priv->qp_num = conn_param->qp_num;
3450                 id_priv->srq = conn_param->srq;
3451         }
3452
3453         if (rdma_cap_ib_cm(id->device, id->port_num)) {
3454                 if (id->qp_type == IB_QPT_UD)
3455                         ret = cma_resolve_ib_udp(id_priv, conn_param);
3456                 else
3457                         ret = cma_connect_ib(id_priv, conn_param);
3458         } else if (rdma_cap_iw_cm(id->device, id->port_num))
3459                 ret = cma_connect_iw(id_priv, conn_param);
3460         else
3461                 ret = -ENOSYS;
3462         if (ret)
3463                 goto err;
3464
3465         return 0;
3466 err:
3467         cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED);
3468         return ret;
3469 }
3470 EXPORT_SYMBOL(rdma_connect);
3471
3472 static int cma_accept_ib(struct rdma_id_private *id_priv,
3473                          struct rdma_conn_param *conn_param)
3474 {
3475         struct ib_cm_rep_param rep;
3476         int ret;
3477
3478         ret = cma_modify_qp_rtr(id_priv, conn_param);
3479         if (ret)
3480                 goto out;
3481
3482         ret = cma_modify_qp_rts(id_priv, conn_param);
3483         if (ret)
3484                 goto out;
3485
3486         memset(&rep, 0, sizeof rep);
3487         rep.qp_num = id_priv->qp_num;
3488         rep.starting_psn = id_priv->seq_num;
3489         rep.private_data = conn_param->private_data;
3490         rep.private_data_len = conn_param->private_data_len;
3491         rep.responder_resources = conn_param->responder_resources;
3492         rep.initiator_depth = conn_param->initiator_depth;
3493         rep.failover_accepted = 0;
3494         rep.flow_control = conn_param->flow_control;
3495         rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
3496         rep.srq = id_priv->srq ? 1 : 0;
3497
3498         ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
3499 out:
3500         return ret;
3501 }
3502
3503 static int cma_accept_iw(struct rdma_id_private *id_priv,
3504                   struct rdma_conn_param *conn_param)
3505 {
3506         struct iw_cm_conn_param iw_param;
3507         int ret;
3508
3509         ret = cma_modify_qp_rtr(id_priv, conn_param);
3510         if (ret)
3511                 return ret;
3512
3513         iw_param.ord = conn_param->initiator_depth;
3514         iw_param.ird = conn_param->responder_resources;
3515         iw_param.private_data = conn_param->private_data;
3516         iw_param.private_data_len = conn_param->private_data_len;
3517         if (id_priv->id.qp) {
3518                 iw_param.qpn = id_priv->qp_num;
3519         } else
3520                 iw_param.qpn = conn_param->qp_num;
3521
3522         return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
3523 }
3524
3525 static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
3526                              enum ib_cm_sidr_status status, u32 qkey,
3527                              const void *private_data, int private_data_len)
3528 {
3529         struct ib_cm_sidr_rep_param rep;
3530         int ret;
3531
3532         memset(&rep, 0, sizeof rep);
3533         rep.status = status;
3534         if (status == IB_SIDR_SUCCESS) {
3535                 ret = cma_set_qkey(id_priv, qkey);
3536                 if (ret)
3537                         return ret;
3538                 rep.qp_num = id_priv->qp_num;
3539                 rep.qkey = id_priv->qkey;
3540         }
3541         rep.private_data = private_data;
3542         rep.private_data_len = private_data_len;
3543
3544         return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
3545 }
3546
3547 int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
3548 {
3549         struct rdma_id_private *id_priv;
3550         int ret;
3551
3552         id_priv = container_of(id, struct rdma_id_private, id);
3553
3554         id_priv->owner = task_pid_nr(current);
3555
3556         if (!cma_comp(id_priv, RDMA_CM_CONNECT))
3557                 return -EINVAL;
3558
3559         if (!id->qp && conn_param) {
3560                 id_priv->qp_num = conn_param->qp_num;
3561                 id_priv->srq = conn_param->srq;
3562         }
3563
3564         if (rdma_cap_ib_cm(id->device, id->port_num)) {
3565                 if (id->qp_type == IB_QPT_UD) {
3566                         if (conn_param)
3567                                 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
3568                                                         conn_param->qkey,
3569                                                         conn_param->private_data,
3570                                                         conn_param->private_data_len);
3571                         else
3572                                 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
3573                                                         0, NULL, 0);
3574                 } else {
3575                         if (conn_param)
3576                                 ret = cma_accept_ib(id_priv, conn_param);
3577                         else
3578                                 ret = cma_rep_recv(id_priv);
3579                 }
3580         } else if (rdma_cap_iw_cm(id->device, id->port_num))
3581                 ret = cma_accept_iw(id_priv, conn_param);
3582         else
3583                 ret = -ENOSYS;
3584
3585         if (ret)
3586                 goto reject;
3587
3588         return 0;
3589 reject:
3590         cma_modify_qp_err(id_priv);
3591         rdma_reject(id, NULL, 0);
3592         return ret;
3593 }
3594 EXPORT_SYMBOL(rdma_accept);
3595
3596 int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
3597 {
3598         struct rdma_id_private *id_priv;
3599         int ret;
3600
3601         id_priv = container_of(id, struct rdma_id_private, id);
3602         if (!id_priv->cm_id.ib)
3603                 return -EINVAL;
3604
3605         switch (id->device->node_type) {
3606         case RDMA_NODE_IB_CA:
3607                 ret = ib_cm_notify(id_priv->cm_id.ib, event);
3608                 break;
3609         default:
3610                 ret = 0;
3611                 break;
3612         }
3613         return ret;
3614 }
3615 EXPORT_SYMBOL(rdma_notify);
3616
3617 int rdma_reject(struct rdma_cm_id *id, const void *private_data,
3618                 u8 private_data_len)
3619 {
3620         struct rdma_id_private *id_priv;
3621         int ret;
3622
3623         id_priv = container_of(id, struct rdma_id_private, id);
3624         if (!id_priv->cm_id.ib)
3625                 return -EINVAL;
3626
3627         if (rdma_cap_ib_cm(id->device, id->port_num)) {
3628                 if (id->qp_type == IB_QPT_UD)
3629                         ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0,
3630                                                 private_data, private_data_len);
3631                 else
3632                         ret = ib_send_cm_rej(id_priv->cm_id.ib,
3633                                              IB_CM_REJ_CONSUMER_DEFINED, NULL,
3634                                              0, private_data, private_data_len);
3635         } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
3636                 ret = iw_cm_reject(id_priv->cm_id.iw,
3637                                    private_data, private_data_len);
3638         } else
3639                 ret = -ENOSYS;
3640
3641         return ret;
3642 }
3643 EXPORT_SYMBOL(rdma_reject);
3644
3645 int rdma_disconnect(struct rdma_cm_id *id)
3646 {
3647         struct rdma_id_private *id_priv;
3648         int ret;
3649
3650         id_priv = container_of(id, struct rdma_id_private, id);
3651         if (!id_priv->cm_id.ib)
3652                 return -EINVAL;
3653
3654         if (rdma_cap_ib_cm(id->device, id->port_num)) {
3655                 ret = cma_modify_qp_err(id_priv);
3656                 if (ret)
3657                         goto out;
3658                 /* Initiate or respond to a disconnect. */
3659                 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
3660                         ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
3661         } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
3662                 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
3663         } else
3664                 ret = -EINVAL;
3665
3666 out:
3667         return ret;
3668 }
3669 EXPORT_SYMBOL(rdma_disconnect);
3670
3671 static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
3672 {
3673         struct rdma_id_private *id_priv;
3674         struct cma_multicast *mc = multicast->context;
3675         struct rdma_cm_event event;
3676         int ret;
3677
3678         id_priv = mc->id_priv;
3679         if (cma_disable_callback(id_priv, RDMA_CM_ADDR_BOUND) &&
3680             cma_disable_callback(id_priv, RDMA_CM_ADDR_RESOLVED))
3681                 return 0;
3682
3683         if (!status)
3684                 status = cma_set_qkey(id_priv, be32_to_cpu(multicast->rec.qkey));
3685         mutex_lock(&id_priv->qp_mutex);
3686         if (!status && id_priv->id.qp)
3687                 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
3688                                          be16_to_cpu(multicast->rec.mlid));
3689         mutex_unlock(&id_priv->qp_mutex);
3690
3691         memset(&event, 0, sizeof event);
3692         event.status = status;
3693         event.param.ud.private_data = mc->context;
3694         if (!status) {
3695                 struct rdma_dev_addr *dev_addr =
3696                         &id_priv->id.route.addr.dev_addr;
3697                 struct net_device *ndev =
3698                         dev_get_by_index(&init_net, dev_addr->bound_dev_if);
3699                 enum ib_gid_type gid_type =
3700                         id_priv->cma_dev->default_gid_type[id_priv->id.port_num -
3701                         rdma_start_port(id_priv->cma_dev->device)];
3702
3703                 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
3704                 ib_init_ah_from_mcmember(id_priv->id.device,
3705                                          id_priv->id.port_num, &multicast->rec,
3706                                          ndev, gid_type,
3707                                          &event.param.ud.ah_attr);
3708                 event.param.ud.qp_num = 0xFFFFFF;
3709                 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
3710                 if (ndev)
3711                         dev_put(ndev);
3712         } else
3713                 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
3714
3715         ret = id_priv->id.event_handler(&id_priv->id, &event);
3716         if (ret) {
3717                 cma_exch(id_priv, RDMA_CM_DESTROYING);
3718                 mutex_unlock(&id_priv->handler_mutex);
3719                 rdma_destroy_id(&id_priv->id);
3720                 return 0;
3721         }
3722
3723         mutex_unlock(&id_priv->handler_mutex);
3724         return 0;
3725 }
3726
3727 static void cma_set_mgid(struct rdma_id_private *id_priv,
3728                          struct sockaddr *addr, union ib_gid *mgid)
3729 {
3730         unsigned char mc_map[MAX_ADDR_LEN];
3731         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3732         struct sockaddr_in *sin = (struct sockaddr_in *) addr;
3733         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
3734
3735         if (cma_any_addr(addr)) {
3736                 memset(mgid, 0, sizeof *mgid);
3737         } else if ((addr->sa_family == AF_INET6) &&
3738                    ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
3739                                                                  0xFF10A01B)) {
3740                 /* IPv6 address is an SA assigned MGID. */
3741                 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3742         } else if (addr->sa_family == AF_IB) {
3743                 memcpy(mgid, &((struct sockaddr_ib *) addr)->sib_addr, sizeof *mgid);
3744         } else if ((addr->sa_family == AF_INET6)) {
3745                 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
3746                 if (id_priv->id.ps == RDMA_PS_UDP)
3747                         mc_map[7] = 0x01;       /* Use RDMA CM signature */
3748                 *mgid = *(union ib_gid *) (mc_map + 4);
3749         } else {
3750                 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
3751                 if (id_priv->id.ps == RDMA_PS_UDP)
3752                         mc_map[7] = 0x01;       /* Use RDMA CM signature */
3753                 *mgid = *(union ib_gid *) (mc_map + 4);
3754         }
3755 }
3756
3757 static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
3758                                  struct cma_multicast *mc)
3759 {
3760         struct ib_sa_mcmember_rec rec;
3761         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3762         ib_sa_comp_mask comp_mask;
3763         int ret;
3764
3765         ib_addr_get_mgid(dev_addr, &rec.mgid);
3766         ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
3767                                      &rec.mgid, &rec);
3768         if (ret)
3769                 return ret;
3770
3771         ret = cma_set_qkey(id_priv, 0);
3772         if (ret)
3773                 return ret;
3774
3775         cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
3776         rec.qkey = cpu_to_be32(id_priv->qkey);
3777         rdma_addr_get_sgid(dev_addr, &rec.port_gid);
3778         rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
3779         rec.join_state = 1;
3780
3781         comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
3782                     IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
3783                     IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
3784                     IB_SA_MCMEMBER_REC_FLOW_LABEL |
3785                     IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
3786
3787         if (id_priv->id.ps == RDMA_PS_IPOIB)
3788                 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
3789                              IB_SA_MCMEMBER_REC_RATE_SELECTOR |
3790                              IB_SA_MCMEMBER_REC_MTU_SELECTOR |
3791                              IB_SA_MCMEMBER_REC_MTU |
3792                              IB_SA_MCMEMBER_REC_HOP_LIMIT;
3793
3794         mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
3795                                                 id_priv->id.port_num, &rec,
3796                                                 comp_mask, GFP_KERNEL,
3797                                                 cma_ib_mc_handler, mc);
3798         return PTR_ERR_OR_ZERO(mc->multicast.ib);
3799 }
3800
3801 static void iboe_mcast_work_handler(struct work_struct *work)
3802 {
3803         struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
3804         struct cma_multicast *mc = mw->mc;
3805         struct ib_sa_multicast *m = mc->multicast.ib;
3806
3807         mc->multicast.ib->context = mc;
3808         cma_ib_mc_handler(0, m);
3809         kref_put(&mc->mcref, release_mc);
3810         kfree(mw);
3811 }
3812
3813 static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid)
3814 {
3815         struct sockaddr_in *sin = (struct sockaddr_in *)addr;
3816         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
3817
3818         if (cma_any_addr(addr)) {
3819                 memset(mgid, 0, sizeof *mgid);
3820         } else if (addr->sa_family == AF_INET6) {
3821                 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3822         } else {
3823                 mgid->raw[0] = 0xff;
3824                 mgid->raw[1] = 0x0e;
3825                 mgid->raw[2] = 0;
3826                 mgid->raw[3] = 0;
3827                 mgid->raw[4] = 0;
3828                 mgid->raw[5] = 0;
3829                 mgid->raw[6] = 0;
3830                 mgid->raw[7] = 0;
3831                 mgid->raw[8] = 0;
3832                 mgid->raw[9] = 0;
3833                 mgid->raw[10] = 0xff;
3834                 mgid->raw[11] = 0xff;
3835                 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
3836         }
3837 }
3838
3839 static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
3840                                    struct cma_multicast *mc)
3841 {
3842         struct iboe_mcast_work *work;
3843         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3844         int err = 0;
3845         struct sockaddr *addr = (struct sockaddr *)&mc->addr;
3846         struct net_device *ndev = NULL;
3847         enum ib_gid_type gid_type;
3848
3849         if (cma_zero_addr((struct sockaddr *)&mc->addr))
3850                 return -EINVAL;
3851
3852         work = kzalloc(sizeof *work, GFP_KERNEL);
3853         if (!work)
3854                 return -ENOMEM;
3855
3856         mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
3857         if (!mc->multicast.ib) {
3858                 err = -ENOMEM;
3859                 goto out1;
3860         }
3861
3862         cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid);
3863
3864         mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
3865         if (id_priv->id.ps == RDMA_PS_UDP)
3866                 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
3867
3868         if (dev_addr->bound_dev_if)
3869                 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
3870         if (!ndev) {
3871                 err = -ENODEV;
3872                 goto out2;
3873         }
3874         mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
3875         mc->multicast.ib->rec.hop_limit = 1;
3876         mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu);
3877
3878         gid_type = id_priv->cma_dev->default_gid_type[id_priv->id.port_num -
3879                    rdma_start_port(id_priv->cma_dev->device)];
3880         if (addr->sa_family == AF_INET) {
3881                 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP)
3882                         err = cma_igmp_send(ndev, &mc->multicast.ib->rec.mgid,
3883                                             true);
3884                 if (!err) {
3885                         mc->igmp_joined = true;
3886                         mc->multicast.ib->rec.hop_limit = IPV6_DEFAULT_HOPLIMIT;
3887                 }
3888         } else {
3889                 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP)
3890                         err = -ENOTSUPP;
3891         }
3892         dev_put(ndev);
3893         if (err || !mc->multicast.ib->rec.mtu) {
3894                 if (!err)
3895                         err = -EINVAL;
3896                 goto out2;
3897         }
3898         rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
3899                     &mc->multicast.ib->rec.port_gid);
3900         work->id = id_priv;
3901         work->mc = mc;
3902         INIT_WORK(&work->work, iboe_mcast_work_handler);
3903         kref_get(&mc->mcref);
3904         queue_work(cma_wq, &work->work);
3905
3906         return 0;
3907
3908 out2:
3909         kfree(mc->multicast.ib);
3910 out1:
3911         kfree(work);
3912         return err;
3913 }
3914
3915 int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
3916                         void *context)
3917 {
3918         struct rdma_id_private *id_priv;
3919         struct cma_multicast *mc;
3920         int ret;
3921
3922         id_priv = container_of(id, struct rdma_id_private, id);
3923         if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) &&
3924             !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED))
3925                 return -EINVAL;
3926
3927         mc = kmalloc(sizeof *mc, GFP_KERNEL);
3928         if (!mc)
3929                 return -ENOMEM;
3930
3931         memcpy(&mc->addr, addr, rdma_addr_size(addr));
3932         mc->context = context;
3933         mc->id_priv = id_priv;
3934         mc->igmp_joined = false;
3935         spin_lock(&id_priv->lock);
3936         list_add(&mc->list, &id_priv->mc_list);
3937         spin_unlock(&id_priv->lock);
3938
3939         if (rdma_protocol_roce(id->device, id->port_num)) {
3940                 kref_init(&mc->mcref);
3941                 ret = cma_iboe_join_multicast(id_priv, mc);
3942         } else if (rdma_cap_ib_mcast(id->device, id->port_num))
3943                 ret = cma_join_ib_multicast(id_priv, mc);
3944         else
3945                 ret = -ENOSYS;
3946
3947         if (ret) {
3948                 spin_lock_irq(&id_priv->lock);
3949                 list_del(&mc->list);
3950                 spin_unlock_irq(&id_priv->lock);
3951                 kfree(mc);
3952         }
3953         return ret;
3954 }
3955 EXPORT_SYMBOL(rdma_join_multicast);
3956
3957 void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
3958 {
3959         struct rdma_id_private *id_priv;
3960         struct cma_multicast *mc;
3961
3962         id_priv = container_of(id, struct rdma_id_private, id);
3963         spin_lock_irq(&id_priv->lock);
3964         list_for_each_entry(mc, &id_priv->mc_list, list) {
3965                 if (!memcmp(&mc->addr, addr, rdma_addr_size(addr))) {
3966                         list_del(&mc->list);
3967                         spin_unlock_irq(&id_priv->lock);
3968
3969                         if (id->qp)
3970                                 ib_detach_mcast(id->qp,
3971                                                 &mc->multicast.ib->rec.mgid,
3972                                                 be16_to_cpu(mc->multicast.ib->rec.mlid));
3973
3974                         BUG_ON(id_priv->cma_dev->device != id->device);
3975
3976                         if (rdma_cap_ib_mcast(id->device, id->port_num)) {
3977                                 ib_sa_free_multicast(mc->multicast.ib);
3978                                 kfree(mc);
3979                         } else if (rdma_protocol_roce(id->device, id->port_num)) {
3980                                 if (mc->igmp_joined) {
3981                                         struct rdma_dev_addr *dev_addr =
3982                                                 &id->route.addr.dev_addr;
3983                                         struct net_device *ndev = NULL;
3984
3985                                         if (dev_addr->bound_dev_if)
3986                                                 ndev = dev_get_by_index(&init_net,
3987                                                                         dev_addr->bound_dev_if);
3988                                         if (ndev) {
3989                                                 cma_igmp_send(ndev,
3990                                                               &mc->multicast.ib->rec.mgid,
3991                                                               false);
3992                                                 dev_put(ndev);
3993                                         }
3994                                         mc->igmp_joined = false;
3995                                 }
3996                                 kref_put(&mc->mcref, release_mc);
3997                         }
3998                         return;
3999                 }
4000         }
4001         spin_unlock_irq(&id_priv->lock);
4002 }
4003 EXPORT_SYMBOL(rdma_leave_multicast);
4004
4005 static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
4006 {
4007         struct rdma_dev_addr *dev_addr;
4008         struct cma_ndev_work *work;
4009
4010         dev_addr = &id_priv->id.route.addr.dev_addr;
4011
4012         if ((dev_addr->bound_dev_if == ndev->ifindex) &&
4013             (net_eq(dev_net(ndev), dev_addr->net)) &&
4014             memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
4015                 pr_info("RDMA CM addr change for ndev %s used by id %p\n",
4016                         ndev->name, &id_priv->id);
4017                 work = kzalloc(sizeof *work, GFP_KERNEL);
4018                 if (!work)
4019                         return -ENOMEM;
4020
4021                 INIT_WORK(&work->work, cma_ndev_work_handler);
4022                 work->id = id_priv;
4023                 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
4024                 atomic_inc(&id_priv->refcount);
4025                 queue_work(cma_wq, &work->work);
4026         }
4027
4028         return 0;
4029 }
4030
4031 static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
4032                                void *ptr)
4033 {
4034         struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
4035         struct cma_device *cma_dev;
4036         struct rdma_id_private *id_priv;
4037         int ret = NOTIFY_DONE;
4038
4039         if (event != NETDEV_BONDING_FAILOVER)
4040                 return NOTIFY_DONE;
4041
4042         if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING))
4043                 return NOTIFY_DONE;
4044
4045         mutex_lock(&lock);
4046         list_for_each_entry(cma_dev, &dev_list, list)
4047                 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
4048                         ret = cma_netdev_change(ndev, id_priv);
4049                         if (ret)
4050                                 goto out;
4051                 }
4052
4053 out:
4054         mutex_unlock(&lock);
4055         return ret;
4056 }
4057
4058 static struct notifier_block cma_nb = {
4059         .notifier_call = cma_netdev_callback
4060 };
4061
4062 static void cma_add_one(struct ib_device *device)
4063 {
4064         struct cma_device *cma_dev;
4065         struct rdma_id_private *id_priv;
4066         unsigned int i;
4067         unsigned long supported_gids = 0;
4068
4069         cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
4070         if (!cma_dev)
4071                 return;
4072
4073         cma_dev->device = device;
4074         cma_dev->default_gid_type = kcalloc(device->phys_port_cnt,
4075                                             sizeof(*cma_dev->default_gid_type),
4076                                             GFP_KERNEL);
4077         if (!cma_dev->default_gid_type) {
4078                 kfree(cma_dev);
4079                 return;
4080         }
4081         for (i = rdma_start_port(device); i <= rdma_end_port(device); i++) {
4082                 supported_gids = roce_gid_type_mask_support(device, i);
4083                 WARN_ON(!supported_gids);
4084                 cma_dev->default_gid_type[i - rdma_start_port(device)] =
4085                         find_first_bit(&supported_gids, BITS_PER_LONG);
4086         }
4087
4088         init_completion(&cma_dev->comp);
4089         atomic_set(&cma_dev->refcount, 1);
4090         INIT_LIST_HEAD(&cma_dev->id_list);
4091         ib_set_client_data(device, &cma_client, cma_dev);
4092
4093         mutex_lock(&lock);
4094         list_add_tail(&cma_dev->list, &dev_list);
4095         list_for_each_entry(id_priv, &listen_any_list, list)
4096                 cma_listen_on_dev(id_priv, cma_dev);
4097         mutex_unlock(&lock);
4098 }
4099
4100 static int cma_remove_id_dev(struct rdma_id_private *id_priv)
4101 {
4102         struct rdma_cm_event event;
4103         enum rdma_cm_state state;
4104         int ret = 0;
4105
4106         /* Record that we want to remove the device */
4107         state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL);
4108         if (state == RDMA_CM_DESTROYING)
4109                 return 0;
4110
4111         cma_cancel_operation(id_priv, state);
4112         mutex_lock(&id_priv->handler_mutex);
4113
4114         /* Check for destruction from another callback. */
4115         if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL))
4116                 goto out;
4117
4118         memset(&event, 0, sizeof event);
4119         event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
4120         ret = id_priv->id.event_handler(&id_priv->id, &event);
4121 out:
4122         mutex_unlock(&id_priv->handler_mutex);
4123         return ret;
4124 }
4125
4126 static void cma_process_remove(struct cma_device *cma_dev)
4127 {
4128         struct rdma_id_private *id_priv;
4129         int ret;
4130
4131         mutex_lock(&lock);
4132         while (!list_empty(&cma_dev->id_list)) {
4133                 id_priv = list_entry(cma_dev->id_list.next,
4134                                      struct rdma_id_private, list);
4135
4136                 list_del(&id_priv->listen_list);
4137                 list_del_init(&id_priv->list);
4138                 atomic_inc(&id_priv->refcount);
4139                 mutex_unlock(&lock);
4140
4141                 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
4142                 cma_deref_id(id_priv);
4143                 if (ret)
4144                         rdma_destroy_id(&id_priv->id);
4145
4146                 mutex_lock(&lock);
4147         }
4148         mutex_unlock(&lock);
4149
4150         cma_deref_dev(cma_dev);
4151         wait_for_completion(&cma_dev->comp);
4152 }
4153
4154 static void cma_remove_one(struct ib_device *device, void *client_data)
4155 {
4156         struct cma_device *cma_dev = client_data;
4157
4158         if (!cma_dev)
4159                 return;
4160
4161         mutex_lock(&lock);
4162         list_del(&cma_dev->list);
4163         mutex_unlock(&lock);
4164
4165         cma_process_remove(cma_dev);
4166         kfree(cma_dev->default_gid_type);
4167         kfree(cma_dev);
4168 }
4169
4170 static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb)
4171 {
4172         struct nlmsghdr *nlh;
4173         struct rdma_cm_id_stats *id_stats;
4174         struct rdma_id_private *id_priv;
4175         struct rdma_cm_id *id = NULL;
4176         struct cma_device *cma_dev;
4177         int i_dev = 0, i_id = 0;
4178
4179         /*
4180          * We export all of the IDs as a sequence of messages.  Each
4181          * ID gets its own netlink message.
4182          */
4183         mutex_lock(&lock);
4184
4185         list_for_each_entry(cma_dev, &dev_list, list) {
4186                 if (i_dev < cb->args[0]) {
4187                         i_dev++;
4188                         continue;
4189                 }
4190
4191                 i_id = 0;
4192                 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
4193                         if (i_id < cb->args[1]) {
4194                                 i_id++;
4195                                 continue;
4196                         }
4197
4198                         id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq,
4199                                                 sizeof *id_stats, RDMA_NL_RDMA_CM,
4200                                                 RDMA_NL_RDMA_CM_ID_STATS,
4201                                                 NLM_F_MULTI);
4202                         if (!id_stats)
4203                                 goto out;
4204
4205                         memset(id_stats, 0, sizeof *id_stats);
4206                         id = &id_priv->id;
4207                         id_stats->node_type = id->route.addr.dev_addr.dev_type;
4208                         id_stats->port_num = id->port_num;
4209                         id_stats->bound_dev_if =
4210                                 id->route.addr.dev_addr.bound_dev_if;
4211
4212                         if (ibnl_put_attr(skb, nlh,
4213                                           rdma_addr_size(cma_src_addr(id_priv)),
4214                                           cma_src_addr(id_priv),
4215                                           RDMA_NL_RDMA_CM_ATTR_SRC_ADDR))
4216                                 goto out;
4217                         if (ibnl_put_attr(skb, nlh,
4218                                           rdma_addr_size(cma_src_addr(id_priv)),
4219                                           cma_dst_addr(id_priv),
4220                                           RDMA_NL_RDMA_CM_ATTR_DST_ADDR))
4221                                 goto out;
4222
4223                         id_stats->pid           = id_priv->owner;
4224                         id_stats->port_space    = id->ps;
4225                         id_stats->cm_state      = id_priv->state;
4226                         id_stats->qp_num        = id_priv->qp_num;
4227                         id_stats->qp_type       = id->qp_type;
4228
4229                         i_id++;
4230                 }
4231
4232                 cb->args[1] = 0;
4233                 i_dev++;
4234         }
4235
4236 out:
4237         mutex_unlock(&lock);
4238         cb->args[0] = i_dev;
4239         cb->args[1] = i_id;
4240
4241         return skb->len;
4242 }
4243
4244 static const struct ibnl_client_cbs cma_cb_table[] = {
4245         [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats,
4246                                        .module = THIS_MODULE },
4247 };
4248
4249 static int cma_init_net(struct net *net)
4250 {
4251         struct cma_pernet *pernet = cma_pernet(net);
4252
4253         idr_init(&pernet->tcp_ps);
4254         idr_init(&pernet->udp_ps);
4255         idr_init(&pernet->ipoib_ps);
4256         idr_init(&pernet->ib_ps);
4257
4258         return 0;
4259 }
4260
4261 static void cma_exit_net(struct net *net)
4262 {
4263         struct cma_pernet *pernet = cma_pernet(net);
4264
4265         idr_destroy(&pernet->tcp_ps);
4266         idr_destroy(&pernet->udp_ps);
4267         idr_destroy(&pernet->ipoib_ps);
4268         idr_destroy(&pernet->ib_ps);
4269 }
4270
4271 static struct pernet_operations cma_pernet_operations = {
4272         .init = cma_init_net,
4273         .exit = cma_exit_net,
4274         .id = &cma_pernet_id,
4275         .size = sizeof(struct cma_pernet),
4276 };
4277
4278 static int __init cma_init(void)
4279 {
4280         int ret;
4281
4282         cma_wq = create_singlethread_workqueue("rdma_cm");
4283         if (!cma_wq)
4284                 return -ENOMEM;
4285
4286         ret = register_pernet_subsys(&cma_pernet_operations);
4287         if (ret)
4288                 goto err_wq;
4289
4290         ib_sa_register_client(&sa_client);
4291         rdma_addr_register_client(&addr_client);
4292         register_netdevice_notifier(&cma_nb);
4293
4294         ret = ib_register_client(&cma_client);
4295         if (ret)
4296                 goto err;
4297
4298         if (ibnl_add_client(RDMA_NL_RDMA_CM, ARRAY_SIZE(cma_cb_table),
4299                             cma_cb_table))
4300                 pr_warn("RDMA CMA: failed to add netlink callback\n");
4301         cma_configfs_init();
4302
4303         return 0;
4304
4305 err:
4306         unregister_netdevice_notifier(&cma_nb);
4307         rdma_addr_unregister_client(&addr_client);
4308         ib_sa_unregister_client(&sa_client);
4309 err_wq:
4310         destroy_workqueue(cma_wq);
4311         return ret;
4312 }
4313
4314 static void __exit cma_cleanup(void)
4315 {
4316         cma_configfs_exit();
4317         ibnl_remove_client(RDMA_NL_RDMA_CM);
4318         ib_unregister_client(&cma_client);
4319         unregister_netdevice_notifier(&cma_nb);
4320         rdma_addr_unregister_client(&addr_client);
4321         ib_sa_unregister_client(&sa_client);
4322         unregister_pernet_subsys(&cma_pernet_operations);
4323         destroy_workqueue(cma_wq);
4324 }
4325
4326 module_init(cma_init);
4327 module_exit(cma_cleanup);