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