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