sys/ofed/drivers/infiniband/core/ib_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 #define LINUXKPI_PARAM_PREFIX ibcore_
  37
  38 #include <linux/completion.h>
  39 #include <linux/in.h>
  40 #include <linux/in6.h>
  41 #include <linux/mutex.h>
  42 #include <linux/random.h>
  43 #include <linux/idr.h>
  44 #include <linux/inetdevice.h>
  45 #include <linux/slab.h>
  46 #include <linux/module.h>
  47 #include <net/route.h>
  48
  49 #include <net/tcp.h>
  50 #include <net/ipv6.h>
  51
  52 #include <netinet6/scope6_var.h>
  53 #include <netinet6/ip6_var.h>
  54
  55 #include <rdma/rdma_cm.h>
  56 #include <rdma/rdma_cm_ib.h>
  57 #include <rdma/ib.h>
  58 #include <rdma/ib_addr.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 <sys/priv.h>
  65
  66 #include "core_priv.h"
  67
  68 MODULE_AUTHOR("Sean Hefty");
  69 MODULE_DESCRIPTION("Generic RDMA CM Agent");
  70 MODULE_LICENSE("Dual BSD/GPL");
  71
  72 #define CMA_CM_RESPONSE_TIMEOUT 20
  73 #define CMA_QUERY_CLASSPORT_INFO_TIMEOUT 3000
  74 #define CMA_MAX_CM_RETRIES 15
  75 #define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
  76 #define CMA_IBOE_PACKET_LIFETIME 18
  77
  78 static const char * const cma_events[] = {
  79         [RDMA_CM_EVENT_ADDR_RESOLVED]    = "address resolved",
  80         [RDMA_CM_EVENT_ADDR_ERROR]       = "address error",
  81         [RDMA_CM_EVENT_ROUTE_RESOLVED]   = "route resolved ",
  82         [RDMA_CM_EVENT_ROUTE_ERROR]      = "route error",
  83         [RDMA_CM_EVENT_CONNECT_REQUEST]  = "connect request",
  84         [RDMA_CM_EVENT_CONNECT_RESPONSE] = "connect response",
  85         [RDMA_CM_EVENT_CONNECT_ERROR]    = "connect error",
  86         [RDMA_CM_EVENT_UNREACHABLE]      = "unreachable",
  87         [RDMA_CM_EVENT_REJECTED]         = "rejected",
  88         [RDMA_CM_EVENT_ESTABLISHED]      = "established",
  89         [RDMA_CM_EVENT_DISCONNECTED]     = "disconnected",
  90         [RDMA_CM_EVENT_DEVICE_REMOVAL]   = "device removal",
  91         [RDMA_CM_EVENT_MULTICAST_JOIN]   = "multicast join",
  92         [RDMA_CM_EVENT_MULTICAST_ERROR]  = "multicast error",
  93         [RDMA_CM_EVENT_ADDR_CHANGE]      = "address change",
  94         [RDMA_CM_EVENT_TIMEWAIT_EXIT]    = "timewait exit",
  95 };
  96
  97 const char *__attribute_const__ rdma_event_msg(enum rdma_cm_event_type event)
  98 {
  99         size_t index = event;
 100
 101         return (index < ARRAY_SIZE(cma_events) && cma_events[index]) ?
 102                         cma_events[index] : "unrecognized event";
 103 }
 104 EXPORT_SYMBOL(rdma_event_msg);
 105
 106 static void cma_add_one(struct ib_device *device);
 107 static void cma_remove_one(struct ib_device *device, void *client_data);
 108
 109 static struct ib_client cma_client = {
 110         .name   = "cma",
 111         .add    = cma_add_one,
 112         .remove = cma_remove_one
 113 };
 114
 115 static struct ib_sa_client sa_client;
 116 static struct rdma_addr_client addr_client;
 117 static LIST_HEAD(dev_list);
 118 static LIST_HEAD(listen_any_list);
 119 static DEFINE_MUTEX(lock);
 120 static struct workqueue_struct *cma_wq;
 121
 122 struct cma_pernet {
 123         struct idr tcp_ps;
 124         struct idr udp_ps;
 125         struct idr ipoib_ps;
 126         struct idr ib_ps;
 127 };
 128
 129 VNET_DEFINE(struct cma_pernet, cma_pernet);
 130
 131 static struct cma_pernet *cma_pernet_ptr(struct vnet *vnet)
 132 {
 133         struct cma_pernet *retval;
 134
 135         CURVNET_SET_QUIET(vnet);
 136         retval = &VNET(cma_pernet);
 137         CURVNET_RESTORE();
 138
 139         return (retval);
 140 }
 141
 142 static struct idr *cma_pernet_idr(struct vnet *net, enum rdma_port_space ps)
 143 {
 144         struct cma_pernet *pernet = cma_pernet_ptr(net);
 145
 146         switch (ps) {
 147         case RDMA_PS_TCP:
 148                 return &pernet->tcp_ps;
 149         case RDMA_PS_UDP:
 150                 return &pernet->udp_ps;
 151         case RDMA_PS_IPOIB:
 152                 return &pernet->ipoib_ps;
 153         case RDMA_PS_IB:
 154                 return &pernet->ib_ps;
 155         default:
 156                 return NULL;
 157         }
 158 }
 159
 160 struct cma_device {
 161         struct list_head        list;
 162         struct ib_device        *device;
 163         struct completion       comp;
 164         atomic_t                refcount;
 165         struct list_head        id_list;
 166         struct sysctl_ctx_list  sysctl_ctx;
 167         enum ib_gid_type        *default_gid_type;
 168 };
 169
 170 struct rdma_bind_list {
 171         enum rdma_port_space    ps;
 172         struct hlist_head       owners;
 173         unsigned short          port;
 174 };
 175
 176 struct class_port_info_context {
 177         struct ib_class_port_info       *class_port_info;
 178         struct ib_device                *device;
 179         struct completion               done;
 180         struct ib_sa_query              *sa_query;
 181         u8                              port_num;
 182 };
 183
 184 static int cma_ps_alloc(struct vnet *vnet, enum rdma_port_space ps,
 185                         struct rdma_bind_list *bind_list, int snum)
 186 {
 187         struct idr *idr = cma_pernet_idr(vnet, ps);
 188
 189         return idr_alloc(idr, bind_list, snum, snum + 1, GFP_KERNEL);
 190 }
 191
 192 static struct rdma_bind_list *cma_ps_find(struct vnet *net,
 193                                           enum rdma_port_space ps, int snum)
 194 {
 195         struct idr *idr = cma_pernet_idr(net, ps);
 196
 197         return idr_find(idr, snum);
 198 }
 199
 200 static void cma_ps_remove(struct vnet *net, enum rdma_port_space ps, int snum)
 201 {
 202         struct idr *idr = cma_pernet_idr(net, ps);
 203
 204         idr_remove(idr, snum);
 205 }
 206
 207 enum {
 208         CMA_OPTION_AFONLY,
 209 };
 210
 211 void cma_ref_dev(struct cma_device *cma_dev)
 212 {
 213         atomic_inc(&cma_dev->refcount);
 214 }
 215
 216 struct cma_device *cma_enum_devices_by_ibdev(cma_device_filter  filter,
 217                                              void               *cookie)
 218 {
 219         struct cma_device *cma_dev;
 220         struct cma_device *found_cma_dev = NULL;
 221
 222         mutex_lock(&lock);
 223
 224         list_for_each_entry(cma_dev, &dev_list, list)
 225                 if (filter(cma_dev->device, cookie)) {
 226                         found_cma_dev = cma_dev;
 227                         break;
 228                 }
 229
 230         if (found_cma_dev)
 231                 cma_ref_dev(found_cma_dev);
 232         mutex_unlock(&lock);
 233         return found_cma_dev;
 234 }
 235
 236 int cma_get_default_gid_type(struct cma_device *cma_dev,
 237                              unsigned int port)
 238 {
 239         if (port < rdma_start_port(cma_dev->device) ||
 240             port > rdma_end_port(cma_dev->device))
 241                 return -EINVAL;
 242
 243         return cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)];
 244 }
 245
 246 int cma_set_default_gid_type(struct cma_device *cma_dev,
 247                              unsigned int port,
 248                              enum ib_gid_type default_gid_type)
 249 {
 250         unsigned long supported_gids;
 251
 252         if (port < rdma_start_port(cma_dev->device) ||
 253             port > rdma_end_port(cma_dev->device))
 254                 return -EINVAL;
 255
 256         supported_gids = roce_gid_type_mask_support(cma_dev->device, port);
 257
 258         if (!(supported_gids & 1 << default_gid_type))
 259                 return -EINVAL;
 260
 261         cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)] =
 262                 default_gid_type;
 263
 264         return 0;
 265 }
 266
 267 struct ib_device *cma_get_ib_dev(struct cma_device *cma_dev)
 268 {
 269         return cma_dev->device;
 270 }
 271
 272 /*
 273  * Device removal can occur at anytime, so we need extra handling to
 274  * serialize notifying the user of device removal with other callbacks.
 275  * We do this by disabling removal notification while a callback is in process,
 276  * and reporting it after the callback completes.
 277  */
 278 struct rdma_id_private {
 279         struct rdma_cm_id       id;
 280
 281         struct rdma_bind_list   *bind_list;
 282         struct hlist_node       node;
 283         struct list_head        list; /* listen_any_list or cma_device.list */
 284         struct list_head        listen_list; /* per device listens */
 285         struct cma_device       *cma_dev;
 286         struct list_head        mc_list;
 287
 288         int                     internal_id;
 289         enum rdma_cm_state      state;
 290         spinlock_t              lock;
 291         struct mutex            qp_mutex;
 292
 293         struct completion       comp;
 294         atomic_t                refcount;
 295         struct mutex            handler_mutex;
 296
 297         int                     backlog;
 298         int                     timeout_ms;
 299         struct ib_sa_query      *query;
 300         int                     query_id;
 301         union {
 302                 struct ib_cm_id *ib;
 303                 struct iw_cm_id *iw;
 304         } cm_id;
 305
 306         u32                     seq_num;
 307         u32                     qkey;
 308         u32                     qp_num;
 309         pid_t                   owner;
 310         u32                     options;
 311         u8                      srq;
 312         u8                      tos;
 313         u8                      reuseaddr;
 314         u8                      afonly;
 315         enum ib_gid_type        gid_type;
 316 };
 317
 318 struct cma_multicast {
 319         struct rdma_id_private *id_priv;
 320         union {
 321                 struct ib_sa_multicast *ib;
 322         } multicast;
 323         struct list_head        list;
 324         void                    *context;
 325         struct sockaddr_storage addr;
 326         struct kref             mcref;
 327         bool                    igmp_joined;
 328         u8                      join_state;
 329 };
 330
 331 struct cma_work {
 332         struct work_struct      work;
 333         struct rdma_id_private  *id;
 334         enum rdma_cm_state      old_state;
 335         enum rdma_cm_state      new_state;
 336         struct rdma_cm_event    event;
 337 };
 338
 339 struct cma_ndev_work {
 340         struct work_struct      work;
 341         struct rdma_id_private  *id;
 342         struct rdma_cm_event    event;
 343 };
 344
 345 struct iboe_mcast_work {
 346         struct work_struct       work;
 347         struct rdma_id_private  *id;
 348         struct cma_multicast    *mc;
 349 };
 350
 351 union cma_ip_addr {
 352         struct in6_addr ip6;
 353         struct {
 354                 __be32 pad[3];
 355                 __be32 addr;
 356         } ip4;
 357 };
 358
 359 struct cma_hdr {
 360         u8 cma_version;
 361         u8 ip_version;  /* IP version: 7:4 */
 362         __be16 port;
 363         union cma_ip_addr src_addr;
 364         union cma_ip_addr dst_addr;
 365 };
 366
 367 #define CMA_VERSION 0x00
 368
 369 struct cma_req_info {
 370         struct ib_device *device;
 371         int port;
 372         union ib_gid local_gid;
 373         __be64 service_id;
 374         u16 pkey;
 375         bool has_gid:1;
 376 };
 377
 378 static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp)
 379 {
 380         unsigned long flags;
 381         int ret;
 382
 383         spin_lock_irqsave(&id_priv->lock, flags);
 384         ret = (id_priv->state == comp);
 385         spin_unlock_irqrestore(&id_priv->lock, flags);
 386         return ret;
 387 }
 388
 389 static int cma_comp_exch(struct rdma_id_private *id_priv,
 390                          enum rdma_cm_state comp, enum rdma_cm_state exch)
 391 {
 392         unsigned long flags;
 393         int ret;
 394
 395         spin_lock_irqsave(&id_priv->lock, flags);
 396         if ((ret = (id_priv->state == comp)))
 397                 id_priv->state = exch;
 398         spin_unlock_irqrestore(&id_priv->lock, flags);
 399         return ret;
 400 }
 401
 402 static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv,
 403                                    enum rdma_cm_state exch)
 404 {
 405         unsigned long flags;
 406         enum rdma_cm_state old;
 407
 408         spin_lock_irqsave(&id_priv->lock, flags);
 409         old = id_priv->state;
 410         id_priv->state = exch;
 411         spin_unlock_irqrestore(&id_priv->lock, flags);
 412         return old;
 413 }
 414
 415 static inline u8 cma_get_ip_ver(const struct cma_hdr *hdr)
 416 {
 417         return hdr->ip_version >> 4;
 418 }
 419
 420 static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
 421 {
 422         hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
 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                                       struct vnet *net,
 544                                       int bound_if_index)
 545 {
 546         int ret = -ENODEV;
 547         struct net_device *ndev = NULL;
 548
 549         if ((dev_type == ARPHRD_INFINIBAND) && !rdma_protocol_ib(device, port))
 550                 return ret;
 551
 552         if ((dev_type != ARPHRD_INFINIBAND) && rdma_protocol_ib(device, port))
 553                 return ret;
 554
 555         if (dev_type == ARPHRD_ETHER && rdma_protocol_roce(device, port)) {
 556                 ndev = dev_get_by_index(net, bound_if_index);
 557                 if (ndev && ndev->if_flags & IFF_LOOPBACK) {
 558                         pr_info("detected loopback device\n");
 559                         dev_put(ndev);
 560
 561                         if (!device->get_netdev)
 562                                 return -EOPNOTSUPP;
 563
 564                         ndev = device->get_netdev(device, port);
 565                         if (!ndev)
 566                                 return -ENODEV;
 567                 }
 568         } else {
 569                 gid_type = IB_GID_TYPE_IB;
 570         }
 571
 572         ret = ib_find_cached_gid_by_port(device, gid, gid_type, port,
 573                                          ndev, NULL);
 574
 575         if (ndev)
 576                 dev_put(ndev);
 577
 578         return ret;
 579 }
 580
 581 static int cma_acquire_dev(struct rdma_id_private *id_priv,
 582                            struct rdma_id_private *listen_id_priv)
 583 {
 584         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
 585         struct cma_device *cma_dev;
 586         union ib_gid gid, iboe_gid, *gidp;
 587         int ret = -ENODEV;
 588         u8 port;
 589
 590         if (dev_addr->dev_type != ARPHRD_INFINIBAND &&
 591             id_priv->id.ps == RDMA_PS_IPOIB)
 592                 return -EINVAL;
 593
 594         mutex_lock(&lock);
 595         rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
 596                     &iboe_gid);
 597
 598         memcpy(&gid, dev_addr->src_dev_addr +
 599                rdma_addr_gid_offset(dev_addr), sizeof gid);
 600
 601         if (listen_id_priv) {
 602                 cma_dev = listen_id_priv->cma_dev;
 603                 port = listen_id_priv->id.port_num;
 604                 gidp = rdma_protocol_roce(cma_dev->device, port) ?
 605                        &iboe_gid : &gid;
 606
 607                 ret = cma_validate_port(cma_dev->device, port,
 608                                         rdma_protocol_ib(cma_dev->device, port) ?
 609                                         IB_GID_TYPE_IB :
 610                                         listen_id_priv->gid_type, gidp,
 611                                         dev_addr->dev_type,
 612                                         dev_addr->net,
 613                                         dev_addr->bound_dev_if);
 614                 if (!ret) {
 615                         id_priv->id.port_num = port;
 616                         goto out;
 617                 }
 618         }
 619
 620         list_for_each_entry(cma_dev, &dev_list, list) {
 621                 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
 622                         if (listen_id_priv &&
 623                             listen_id_priv->cma_dev == cma_dev &&
 624                             listen_id_priv->id.port_num == port)
 625                                 continue;
 626
 627                         gidp = rdma_protocol_roce(cma_dev->device, port) ?
 628                                &iboe_gid : &gid;
 629
 630                         ret = cma_validate_port(cma_dev->device, port,
 631                                                 rdma_protocol_ib(cma_dev->device, port) ?
 632                                                 IB_GID_TYPE_IB :
 633                                                 cma_dev->default_gid_type[port - 1],
 634                                                 gidp, dev_addr->dev_type,
 635                                                 dev_addr->net,
 636                                                 dev_addr->bound_dev_if);
 637                         if (!ret) {
 638                                 id_priv->id.port_num = port;
 639                                 goto out;
 640                         }
 641                 }
 642         }
 643
 644 out:
 645         if (!ret)
 646                 cma_attach_to_dev(id_priv, cma_dev);
 647
 648         mutex_unlock(&lock);
 649         return ret;
 650 }
 651
 652 /*
 653  * Select the source IB device and address to reach the destination IB address.
 654  */
 655 static int cma_resolve_ib_dev(struct rdma_id_private *id_priv)
 656 {
 657         struct cma_device *cma_dev, *cur_dev;
 658         struct sockaddr_ib *addr;
 659         union ib_gid gid, sgid, *dgid;
 660         u16 pkey, index;
 661         u8 p;
 662         int i;
 663
 664         cma_dev = NULL;
 665         addr = (struct sockaddr_ib *) cma_dst_addr(id_priv);
 666         dgid = (union ib_gid *) &addr->sib_addr;
 667         pkey = ntohs(addr->sib_pkey);
 668
 669         list_for_each_entry(cur_dev, &dev_list, list) {
 670                 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
 671                         if (!rdma_cap_af_ib(cur_dev->device, p))
 672                                 continue;
 673
 674                         if (ib_find_cached_pkey(cur_dev->device, p, pkey, &index))
 675                                 continue;
 676
 677                         for (i = 0; !ib_get_cached_gid(cur_dev->device, p, i,
 678                                                        &gid, NULL);
 679                              i++) {
 680                                 if (!memcmp(&gid, dgid, sizeof(gid))) {
 681                                         cma_dev = cur_dev;
 682                                         sgid = gid;
 683                                         id_priv->id.port_num = p;
 684                                         goto found;
 685                                 }
 686
 687                                 if (!cma_dev && (gid.global.subnet_prefix ==
 688                                                  dgid->global.subnet_prefix)) {
 689                                         cma_dev = cur_dev;
 690                                         sgid = gid;
 691                                         id_priv->id.port_num = p;
 692                                 }
 693                         }
 694                 }
 695         }
 696
 697         if (!cma_dev)
 698                 return -ENODEV;
 699
 700 found:
 701         cma_attach_to_dev(id_priv, cma_dev);
 702         addr = (struct sockaddr_ib *) cma_src_addr(id_priv);
 703         memcpy(&addr->sib_addr, &sgid, sizeof sgid);
 704         cma_translate_ib(addr, &id_priv->id.route.addr.dev_addr);
 705         return 0;
 706 }
 707
 708 static void cma_deref_id(struct rdma_id_private *id_priv)
 709 {
 710         if (atomic_dec_and_test(&id_priv->refcount))
 711                 complete(&id_priv->comp);
 712 }
 713
 714 struct rdma_cm_id *rdma_create_id(struct vnet *net,
 715                                   rdma_cm_event_handler event_handler,
 716                                   void *context, enum rdma_port_space ps,
 717                                   enum ib_qp_type qp_type)
 718 {
 719         struct rdma_id_private *id_priv;
 720
 721         id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
 722         if (!id_priv)
 723                 return ERR_PTR(-ENOMEM);
 724
 725         id_priv->owner = task_pid_nr(current);
 726         id_priv->state = RDMA_CM_IDLE;
 727         id_priv->id.context = context;
 728         id_priv->id.event_handler = event_handler;
 729         id_priv->id.ps = ps;
 730         id_priv->id.qp_type = qp_type;
 731         spin_lock_init(&id_priv->lock);
 732         mutex_init(&id_priv->qp_mutex);
 733         init_completion(&id_priv->comp);
 734         atomic_set(&id_priv->refcount, 1);
 735         mutex_init(&id_priv->handler_mutex);
 736         INIT_LIST_HEAD(&id_priv->listen_list);
 737         INIT_LIST_HEAD(&id_priv->mc_list);
 738         get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
 739         id_priv->id.route.addr.dev_addr.net = TD_TO_VNET(curthread);
 740
 741         return &id_priv->id;
 742 }
 743 EXPORT_SYMBOL(rdma_create_id);
 744
 745 static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
 746 {
 747         struct ib_qp_attr qp_attr;
 748         int qp_attr_mask, ret;
 749
 750         qp_attr.qp_state = IB_QPS_INIT;
 751         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 752         if (ret)
 753                 return ret;
 754
 755         ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
 756         if (ret)
 757                 return ret;
 758
 759         qp_attr.qp_state = IB_QPS_RTR;
 760         ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
 761         if (ret)
 762                 return ret;
 763
 764         qp_attr.qp_state = IB_QPS_RTS;
 765         qp_attr.sq_psn = 0;
 766         ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
 767
 768         return ret;
 769 }
 770
 771 static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
 772 {
 773         struct ib_qp_attr qp_attr;
 774         int qp_attr_mask, ret;
 775
 776         qp_attr.qp_state = IB_QPS_INIT;
 777         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 778         if (ret)
 779                 return ret;
 780
 781         return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
 782 }
 783
 784 int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
 785                    struct ib_qp_init_attr *qp_init_attr)
 786 {
 787         struct rdma_id_private *id_priv;
 788         struct ib_qp *qp;
 789         int ret;
 790
 791         id_priv = container_of(id, struct rdma_id_private, id);
 792         if (id->device != pd->device)
 793                 return -EINVAL;
 794
 795         qp_init_attr->port_num = id->port_num;
 796         qp = ib_create_qp(pd, qp_init_attr);
 797         if (IS_ERR(qp))
 798                 return PTR_ERR(qp);
 799
 800         if (id->qp_type == IB_QPT_UD)
 801                 ret = cma_init_ud_qp(id_priv, qp);
 802         else
 803                 ret = cma_init_conn_qp(id_priv, qp);
 804         if (ret)
 805                 goto err;
 806
 807         id->qp = qp;
 808         id_priv->qp_num = qp->qp_num;
 809         id_priv->srq = (qp->srq != NULL);
 810         return 0;
 811 err:
 812         ib_destroy_qp(qp);
 813         return ret;
 814 }
 815 EXPORT_SYMBOL(rdma_create_qp);
 816
 817 void rdma_destroy_qp(struct rdma_cm_id *id)
 818 {
 819         struct rdma_id_private *id_priv;
 820
 821         id_priv = container_of(id, struct rdma_id_private, id);
 822         mutex_lock(&id_priv->qp_mutex);
 823         ib_destroy_qp(id_priv->id.qp);
 824         id_priv->id.qp = NULL;
 825         mutex_unlock(&id_priv->qp_mutex);
 826 }
 827 EXPORT_SYMBOL(rdma_destroy_qp);
 828
 829 static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
 830                              struct rdma_conn_param *conn_param)
 831 {
 832         struct ib_qp_attr qp_attr;
 833         int qp_attr_mask, ret;
 834         union ib_gid sgid;
 835
 836         mutex_lock(&id_priv->qp_mutex);
 837         if (!id_priv->id.qp) {
 838                 ret = 0;
 839                 goto out;
 840         }
 841
 842         /* Need to update QP attributes from default values. */
 843         qp_attr.qp_state = IB_QPS_INIT;
 844         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 845         if (ret)
 846                 goto out;
 847
 848         ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
 849         if (ret)
 850                 goto out;
 851
 852         qp_attr.qp_state = IB_QPS_RTR;
 853         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 854         if (ret)
 855                 goto out;
 856
 857         ret = ib_query_gid(id_priv->id.device, id_priv->id.port_num,
 858                            qp_attr.ah_attr.grh.sgid_index, &sgid, NULL);
 859         if (ret)
 860                 goto out;
 861
 862         BUG_ON(id_priv->cma_dev->device != id_priv->id.device);
 863
 864         if (conn_param)
 865                 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
 866         ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
 867 out:
 868         mutex_unlock(&id_priv->qp_mutex);
 869         return ret;
 870 }
 871
 872 static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
 873                              struct rdma_conn_param *conn_param)
 874 {
 875         struct ib_qp_attr qp_attr;
 876         int qp_attr_mask, ret;
 877
 878         mutex_lock(&id_priv->qp_mutex);
 879         if (!id_priv->id.qp) {
 880                 ret = 0;
 881                 goto out;
 882         }
 883
 884         qp_attr.qp_state = IB_QPS_RTS;
 885         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 886         if (ret)
 887                 goto out;
 888
 889         if (conn_param)
 890                 qp_attr.max_rd_atomic = conn_param->initiator_depth;
 891         ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
 892 out:
 893         mutex_unlock(&id_priv->qp_mutex);
 894         return ret;
 895 }
 896
 897 static int cma_modify_qp_err(struct rdma_id_private *id_priv)
 898 {
 899         struct ib_qp_attr qp_attr;
 900         int ret;
 901
 902         mutex_lock(&id_priv->qp_mutex);
 903         if (!id_priv->id.qp) {
 904                 ret = 0;
 905                 goto out;
 906         }
 907
 908         qp_attr.qp_state = IB_QPS_ERR;
 909         ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
 910 out:
 911         mutex_unlock(&id_priv->qp_mutex);
 912         return ret;
 913 }
 914
 915 static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
 916                                struct ib_qp_attr *qp_attr, int *qp_attr_mask)
 917 {
 918         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
 919         int ret;
 920         u16 pkey;
 921
 922         if (rdma_cap_eth_ah(id_priv->id.device, id_priv->id.port_num))
 923                 pkey = 0xffff;
 924         else
 925                 pkey = ib_addr_get_pkey(dev_addr);
 926
 927         ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
 928                                   pkey, &qp_attr->pkey_index);
 929         if (ret)
 930                 return ret;
 931
 932         qp_attr->port_num = id_priv->id.port_num;
 933         *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
 934
 935         if (id_priv->id.qp_type == IB_QPT_UD) {
 936                 ret = cma_set_qkey(id_priv, 0);
 937                 if (ret)
 938                         return ret;
 939
 940                 qp_attr->qkey = id_priv->qkey;
 941                 *qp_attr_mask |= IB_QP_QKEY;
 942         } else {
 943                 qp_attr->qp_access_flags = 0;
 944                 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
 945         }
 946         return 0;
 947 }
 948
 949 int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
 950                        int *qp_attr_mask)
 951 {
 952         struct rdma_id_private *id_priv;
 953         int ret = 0;
 954
 955         id_priv = container_of(id, struct rdma_id_private, id);
 956         if (rdma_cap_ib_cm(id->device, id->port_num)) {
 957                 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD))
 958                         ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
 959                 else
 960                         ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
 961                                                  qp_attr_mask);
 962
 963                 if (qp_attr->qp_state == IB_QPS_RTR)
 964                         qp_attr->rq_psn = id_priv->seq_num;
 965         } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
 966                 if (!id_priv->cm_id.iw) {
 967                         qp_attr->qp_access_flags = 0;
 968                         *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
 969                 } else
 970                         ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
 971                                                  qp_attr_mask);
 972         } else
 973                 ret = -ENOSYS;
 974
 975         return ret;
 976 }
 977 EXPORT_SYMBOL(rdma_init_qp_attr);
 978
 979 static inline int cma_zero_addr(struct sockaddr *addr)
 980 {
 981         switch (addr->sa_family) {
 982         case AF_INET:
 983                 return ipv4_is_zeronet(((struct sockaddr_in *)addr)->sin_addr.s_addr);
 984         case AF_INET6:
 985                 return ipv6_addr_any(&((struct sockaddr_in6 *) addr)->sin6_addr);
 986         case AF_IB:
 987                 return ib_addr_any(&((struct sockaddr_ib *) addr)->sib_addr);
 988         default:
 989                 return 0;
 990         }
 991 }
 992
 993 static inline int cma_loopback_addr(struct sockaddr *addr)
 994 {
 995         switch (addr->sa_family) {
 996         case AF_INET:
 997                 return ipv4_is_loopback(((struct sockaddr_in *) addr)->sin_addr.s_addr);
 998         case AF_INET6:
 999                 return ipv6_addr_loopback(&((struct sockaddr_in6 *) addr)->sin6_addr);
1000         case AF_IB:
1001                 return ib_addr_loopback(&((struct sockaddr_ib *) addr)->sib_addr);
1002         default:
1003                 return 0;
1004         }
1005 }
1006
1007 static inline int cma_any_addr(struct sockaddr *addr)
1008 {
1009         return cma_zero_addr(addr) || cma_loopback_addr(addr);
1010 }
1011
1012 static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst)
1013 {
1014         if (src->sa_family != dst->sa_family)
1015                 return -1;
1016
1017         switch (src->sa_family) {
1018         case AF_INET:
1019                 return ((struct sockaddr_in *) src)->sin_addr.s_addr !=
1020                        ((struct sockaddr_in *) dst)->sin_addr.s_addr;
1021         case AF_INET6:
1022                 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr,
1023                                      &((struct sockaddr_in6 *) dst)->sin6_addr);
1024         default:
1025                 return ib_addr_cmp(&((struct sockaddr_ib *) src)->sib_addr,
1026                                    &((struct sockaddr_ib *) dst)->sib_addr);
1027         }
1028 }
1029
1030 static __be16 cma_port(struct sockaddr *addr)
1031 {
1032         struct sockaddr_ib *sib;
1033
1034         switch (addr->sa_family) {
1035         case AF_INET:
1036                 return ((struct sockaddr_in *) addr)->sin_port;
1037         case AF_INET6:
1038                 return ((struct sockaddr_in6 *) addr)->sin6_port;
1039         case AF_IB:
1040                 sib = (struct sockaddr_ib *) addr;
1041                 return htons((u16) (be64_to_cpu(sib->sib_sid) &
1042                                     be64_to_cpu(sib->sib_sid_mask)));
1043         default:
1044                 return 0;
1045         }
1046 }
1047
1048 static inline int cma_any_port(struct sockaddr *addr)
1049 {
1050         return !cma_port(addr);
1051 }
1052
1053 static void cma_save_ib_info(struct sockaddr *src_addr,
1054                              struct sockaddr *dst_addr,
1055                              struct rdma_cm_id *listen_id,
1056                              struct ib_sa_path_rec *path)
1057 {
1058         struct sockaddr_ib *listen_ib, *ib;
1059
1060         listen_ib = (struct sockaddr_ib *) &listen_id->route.addr.src_addr;
1061         if (src_addr) {
1062                 ib = (struct sockaddr_ib *)src_addr;
1063                 ib->sib_family = AF_IB;
1064                 if (path) {
1065                         ib->sib_pkey = path->pkey;
1066                         ib->sib_flowinfo = path->flow_label;
1067                         memcpy(&ib->sib_addr, &path->sgid, 16);
1068                         ib->sib_sid = path->service_id;
1069                         ib->sib_scope_id = 0;
1070                 } else {
1071                         ib->sib_pkey = listen_ib->sib_pkey;
1072                         ib->sib_flowinfo = listen_ib->sib_flowinfo;
1073                         ib->sib_addr = listen_ib->sib_addr;
1074                         ib->sib_sid = listen_ib->sib_sid;
1075                         ib->sib_scope_id = listen_ib->sib_scope_id;
1076                 }
1077                 ib->sib_sid_mask = cpu_to_be64(0xffffffffffffffffULL);
1078         }
1079         if (dst_addr) {
1080                 ib = (struct sockaddr_ib *)dst_addr;
1081                 ib->sib_family = AF_IB;
1082                 if (path) {
1083                         ib->sib_pkey = path->pkey;
1084                         ib->sib_flowinfo = path->flow_label;
1085                         memcpy(&ib->sib_addr, &path->dgid, 16);
1086                 }
1087         }
1088 }
1089
1090 static void cma_save_ip4_info(struct sockaddr_in *src_addr,
1091                               struct sockaddr_in *dst_addr,
1092                               struct cma_hdr *hdr,
1093                               __be16 local_port)
1094 {
1095         if (src_addr) {
1096                 *src_addr = (struct sockaddr_in) {
1097                         .sin_len = sizeof(struct sockaddr_in),
1098                         .sin_family = AF_INET,
1099                         .sin_addr.s_addr = hdr->dst_addr.ip4.addr,
1100                         .sin_port = local_port,
1101                 };
1102         }
1103
1104         if (dst_addr) {
1105                 *dst_addr = (struct sockaddr_in) {
1106                         .sin_len = sizeof(struct sockaddr_in),
1107                         .sin_family = AF_INET,
1108                         .sin_addr.s_addr = hdr->src_addr.ip4.addr,
1109                         .sin_port = hdr->port,
1110                 };
1111         }
1112 }
1113
1114 static void cma_save_ip6_info(struct sockaddr_in6 *src_addr,
1115                               struct sockaddr_in6 *dst_addr,
1116                               struct cma_hdr *hdr,
1117                               __be16 local_port)
1118 {
1119         if (src_addr) {
1120                 *src_addr = (struct sockaddr_in6) {
1121                         .sin6_len = sizeof(struct sockaddr_in6),
1122                         .sin6_family = AF_INET6,
1123                         .sin6_addr = hdr->dst_addr.ip6,
1124                         .sin6_port = local_port,
1125                 };
1126         }
1127
1128         if (dst_addr) {
1129                 *dst_addr = (struct sockaddr_in6) {
1130                         .sin6_len = sizeof(struct sockaddr_in6),
1131                         .sin6_family = AF_INET6,
1132                         .sin6_addr = hdr->src_addr.ip6,
1133                         .sin6_port = hdr->port,
1134                 };
1135         }
1136 }
1137
1138 static u16 cma_port_from_service_id(__be64 service_id)
1139 {
1140         return (u16)be64_to_cpu(service_id);
1141 }
1142
1143 static int cma_save_ip_info(struct sockaddr *src_addr,
1144                             struct sockaddr *dst_addr,
1145                             struct ib_cm_event *ib_event,
1146                             __be64 service_id)
1147 {
1148         struct cma_hdr *hdr;
1149         __be16 port;
1150
1151         hdr = ib_event->private_data;
1152         if (hdr->cma_version != CMA_VERSION)
1153                 return -EINVAL;
1154
1155         port = htons(cma_port_from_service_id(service_id));
1156
1157         switch (cma_get_ip_ver(hdr)) {
1158         case 4:
1159                 cma_save_ip4_info((struct sockaddr_in *)src_addr,
1160                                   (struct sockaddr_in *)dst_addr, hdr, port);
1161                 break;
1162         case 6:
1163                 cma_save_ip6_info((struct sockaddr_in6 *)src_addr,
1164                                   (struct sockaddr_in6 *)dst_addr, hdr, port);
1165                 break;
1166         default:
1167                 return -EAFNOSUPPORT;
1168         }
1169
1170         return 0;
1171 }
1172
1173 static int cma_save_net_info(struct sockaddr *src_addr,
1174                              struct sockaddr *dst_addr,
1175                              struct rdma_cm_id *listen_id,
1176                              struct ib_cm_event *ib_event,
1177                              sa_family_t sa_family, __be64 service_id)
1178 {
1179         if (sa_family == AF_IB) {
1180                 if (ib_event->event == IB_CM_REQ_RECEIVED)
1181                         cma_save_ib_info(src_addr, dst_addr, listen_id,
1182                                          ib_event->param.req_rcvd.primary_path);
1183                 else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED)
1184                         cma_save_ib_info(src_addr, dst_addr, listen_id, NULL);
1185                 return 0;
1186         }
1187
1188         return cma_save_ip_info(src_addr, dst_addr, ib_event, service_id);
1189 }
1190
1191 static int cma_save_req_info(const struct ib_cm_event *ib_event,
1192                              struct cma_req_info *req)
1193 {
1194         const struct ib_cm_req_event_param *req_param =
1195                 &ib_event->param.req_rcvd;
1196         const struct ib_cm_sidr_req_event_param *sidr_param =
1197                 &ib_event->param.sidr_req_rcvd;
1198
1199         switch (ib_event->event) {
1200         case IB_CM_REQ_RECEIVED:
1201                 req->device     = req_param->listen_id->device;
1202                 req->port       = req_param->port;
1203                 memcpy(&req->local_gid, &req_param->primary_path->sgid,
1204                        sizeof(req->local_gid));
1205                 req->has_gid    = true;
1206                 req->service_id = req_param->primary_path->service_id;
1207                 req->pkey       = be16_to_cpu(req_param->primary_path->pkey);
1208                 if (req->pkey != req_param->bth_pkey)
1209                         pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and primary path P_Key (0x%x)\n"
1210                                             "RDMA CMA: in the future this may cause the request to be dropped\n",
1211                                             req_param->bth_pkey, req->pkey);
1212                 break;
1213         case IB_CM_SIDR_REQ_RECEIVED:
1214                 req->device     = sidr_param->listen_id->device;
1215                 req->port       = sidr_param->port;
1216                 req->has_gid    = false;
1217                 req->service_id = sidr_param->service_id;
1218                 req->pkey       = sidr_param->pkey;
1219                 if (req->pkey != sidr_param->bth_pkey)
1220                         pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and SIDR request payload P_Key (0x%x)\n"
1221                                             "RDMA CMA: in the future this may cause the request to be dropped\n",
1222                                             sidr_param->bth_pkey, req->pkey);
1223                 break;
1224         default:
1225                 return -EINVAL;
1226         }
1227
1228         return 0;
1229 }
1230
1231 static bool validate_ipv4_net_dev(struct net_device *net_dev,
1232                                   const struct sockaddr_in *dst_addr,
1233                                   const struct sockaddr_in *src_addr)
1234 {
1235 #ifdef INET
1236         struct sockaddr_in dst_tmp = *dst_addr;
1237         __be32 daddr = dst_addr->sin_addr.s_addr,
1238                saddr = src_addr->sin_addr.s_addr;
1239         struct net_device *src_dev;
1240         struct rtentry *rte;
1241         bool ret;
1242
1243         if (ipv4_is_multicast(saddr) || ipv4_is_lbcast(saddr) ||
1244             ipv4_is_lbcast(daddr) || ipv4_is_zeronet(saddr) ||
1245             ipv4_is_zeronet(daddr) || ipv4_is_loopback(daddr) ||
1246             ipv4_is_loopback(saddr))
1247                 return false;
1248
1249         src_dev = ip_dev_find(net_dev->if_vnet, saddr);
1250         if (src_dev != net_dev) {
1251                 if (src_dev != NULL)
1252                         dev_put(src_dev);
1253                 return false;
1254         }
1255         dev_put(src_dev);
1256
1257         /*
1258          * Make sure the socket address length field
1259          * is set, else rtalloc1() will fail.
1260          */
1261         dst_tmp.sin_len = sizeof(dst_tmp);
1262
1263         CURVNET_SET(net_dev->if_vnet);
1264         rte = rtalloc1((struct sockaddr *)&dst_tmp, 1, 0);
1265         CURVNET_RESTORE();
1266         if (rte != NULL) {
1267                 ret = (rte->rt_ifp == net_dev);
1268                 RTFREE_LOCKED(rte);
1269         } else {
1270                 ret = false;
1271         }
1272         return ret;
1273 #else
1274         return false;
1275 #endif
1276 }
1277
1278 static bool validate_ipv6_net_dev(struct net_device *net_dev,
1279                                   const struct sockaddr_in6 *dst_addr,
1280                                   const struct sockaddr_in6 *src_addr)
1281 {
1282 #ifdef INET6
1283         struct sockaddr_in6 dst_tmp = *dst_addr;
1284         struct in6_addr in6_addr = src_addr->sin6_addr;
1285         struct net_device *src_dev;
1286         struct rtentry *rte;
1287         bool ret;
1288
1289         src_dev = ip6_dev_find(net_dev->if_vnet, in6_addr);
1290         if (src_dev != net_dev)
1291                 return false;
1292
1293         /*
1294          * Make sure the socket address length field
1295          * is set, else rtalloc1() will fail.
1296          */
1297         dst_tmp.sin6_len = sizeof(dst_tmp);
1298
1299         CURVNET_SET(net_dev->if_vnet);
1300         rte = rtalloc1((struct sockaddr *)&dst_tmp, 1, 0);
1301         CURVNET_RESTORE();
1302         if (rte != NULL) {
1303                 ret = (rte->rt_ifp == net_dev);
1304                 RTFREE_LOCKED(rte);
1305         } else {
1306                 ret = false;
1307         }
1308         return ret;
1309 #else
1310         return false;
1311 #endif
1312 }
1313
1314 static bool validate_net_dev(struct net_device *net_dev,
1315                              const struct sockaddr *daddr,
1316                              const struct sockaddr *saddr)
1317 {
1318         const struct sockaddr_in *daddr4 = (const struct sockaddr_in *)daddr;
1319         const struct sockaddr_in *saddr4 = (const struct sockaddr_in *)saddr;
1320         const struct sockaddr_in6 *daddr6 = (const struct sockaddr_in6 *)daddr;
1321         const struct sockaddr_in6 *saddr6 = (const struct sockaddr_in6 *)saddr;
1322
1323         switch (daddr->sa_family) {
1324         case AF_INET:
1325                 return saddr->sa_family == AF_INET &&
1326                        validate_ipv4_net_dev(net_dev, daddr4, saddr4);
1327
1328         case AF_INET6:
1329                 return saddr->sa_family == AF_INET6 &&
1330                        validate_ipv6_net_dev(net_dev, daddr6, saddr6);
1331
1332         default:
1333                 return false;
1334         }
1335 }
1336
1337 static struct net_device *cma_get_net_dev(struct ib_cm_event *ib_event,
1338                                           const struct cma_req_info *req)
1339 {
1340         struct sockaddr_storage listen_addr_storage, src_addr_storage;
1341         struct sockaddr *listen_addr = (struct sockaddr *)&listen_addr_storage,
1342                         *src_addr = (struct sockaddr *)&src_addr_storage;
1343         struct net_device *net_dev;
1344         const union ib_gid *gid = req->has_gid ? &req->local_gid : NULL;
1345         int err;
1346
1347         err = cma_save_ip_info(listen_addr, src_addr, ib_event,
1348                                req->service_id);
1349         if (err)
1350                 return ERR_PTR(err);
1351
1352         net_dev = ib_get_net_dev_by_params(req->device, req->port, req->pkey,
1353                                            gid, listen_addr);
1354         if (!net_dev)
1355                 return ERR_PTR(-ENODEV);
1356
1357         if (!validate_net_dev(net_dev, listen_addr, src_addr)) {
1358                 dev_put(net_dev);
1359                 return ERR_PTR(-EHOSTUNREACH);
1360         }
1361
1362         return net_dev;
1363 }
1364
1365 static enum rdma_port_space rdma_ps_from_service_id(__be64 service_id)
1366 {
1367         return (be64_to_cpu(service_id) >> 16) & 0xffff;
1368 }
1369
1370 static bool cma_match_private_data(struct rdma_id_private *id_priv,
1371                                    const struct cma_hdr *hdr)
1372 {
1373         struct sockaddr *addr = cma_src_addr(id_priv);
1374         __be32 ip4_addr;
1375         struct in6_addr ip6_addr;
1376
1377         if (cma_any_addr(addr) && !id_priv->afonly)
1378                 return true;
1379
1380         switch (addr->sa_family) {
1381         case AF_INET:
1382                 ip4_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
1383                 if (cma_get_ip_ver(hdr) != 4)
1384                         return false;
1385                 if (!cma_any_addr(addr) &&
1386                     hdr->dst_addr.ip4.addr != ip4_addr)
1387                         return false;
1388                 break;
1389         case AF_INET6:
1390                 ip6_addr = ((struct sockaddr_in6 *)addr)->sin6_addr;
1391                 if (cma_get_ip_ver(hdr) != 6)
1392                         return false;
1393                 if (!cma_any_addr(addr) &&
1394                     memcmp(&hdr->dst_addr.ip6, &ip6_addr, sizeof(ip6_addr)))
1395                         return false;
1396                 break;
1397         case AF_IB:
1398                 return true;
1399         default:
1400                 return false;
1401         }
1402
1403         return true;
1404 }
1405
1406 static bool cma_protocol_roce_dev_port(struct ib_device *device, int port_num)
1407 {
1408         enum rdma_link_layer ll = rdma_port_get_link_layer(device, port_num);
1409         enum rdma_transport_type transport =
1410                 rdma_node_get_transport(device->node_type);
1411
1412         return ll == IB_LINK_LAYER_ETHERNET && transport == RDMA_TRANSPORT_IB;
1413 }
1414
1415 static bool cma_protocol_roce(const struct rdma_cm_id *id)
1416 {
1417         struct ib_device *device = id->device;
1418         const int port_num = id->port_num ?: rdma_start_port(device);
1419
1420         return cma_protocol_roce_dev_port(device, port_num);
1421 }
1422
1423 static bool cma_match_net_dev(const struct rdma_cm_id *id,
1424                               const struct net_device *net_dev,
1425                               u8 port_num)
1426 {
1427         const struct rdma_addr *addr = &id->route.addr;
1428
1429         if (!net_dev)
1430                 /* This request is an AF_IB request or a RoCE request */
1431                 return (!id->port_num || id->port_num == port_num) &&
1432                        (addr->src_addr.ss_family == AF_IB ||
1433                         cma_protocol_roce_dev_port(id->device, port_num));
1434
1435         return !addr->dev_addr.bound_dev_if ||
1436                (net_eq(dev_net(net_dev), addr->dev_addr.net) &&
1437                 addr->dev_addr.bound_dev_if == net_dev->if_index);
1438 }
1439
1440 static struct rdma_id_private *cma_find_listener(
1441                 const struct rdma_bind_list *bind_list,
1442                 const struct ib_cm_id *cm_id,
1443                 const struct ib_cm_event *ib_event,
1444                 const struct cma_req_info *req,
1445                 const struct net_device *net_dev)
1446 {
1447         struct rdma_id_private *id_priv, *id_priv_dev;
1448
1449         if (!bind_list)
1450                 return ERR_PTR(-EINVAL);
1451
1452         hlist_for_each_entry(id_priv, &bind_list->owners, node) {
1453                 if (cma_match_private_data(id_priv, ib_event->private_data)) {
1454                         if (id_priv->id.device == cm_id->device &&
1455                             cma_match_net_dev(&id_priv->id, net_dev, req->port))
1456                                 return id_priv;
1457                         list_for_each_entry(id_priv_dev,
1458                                             &id_priv->listen_list,
1459                                             listen_list) {
1460                                 if (id_priv_dev->id.device == cm_id->device &&
1461                                     cma_match_net_dev(&id_priv_dev->id, net_dev, req->port))
1462                                         return id_priv_dev;
1463                         }
1464                 }
1465         }
1466
1467         return ERR_PTR(-EINVAL);
1468 }
1469
1470 static struct rdma_id_private *cma_id_from_event(struct ib_cm_id *cm_id,
1471                                                  struct ib_cm_event *ib_event,
1472                                                  struct net_device **net_dev)
1473 {
1474         struct cma_req_info req;
1475         struct rdma_bind_list *bind_list;
1476         struct rdma_id_private *id_priv;
1477         int err;
1478
1479         err = cma_save_req_info(ib_event, &req);
1480         if (err)
1481                 return ERR_PTR(err);
1482
1483         *net_dev = cma_get_net_dev(ib_event, &req);
1484         if (IS_ERR(*net_dev)) {
1485                 if (PTR_ERR(*net_dev) == -EAFNOSUPPORT) {
1486                         /* Assuming the protocol is AF_IB */
1487                         *net_dev = NULL;
1488                 } else if (cma_protocol_roce_dev_port(req.device, req.port)) {
1489                         /* TODO find the net dev matching the request parameters
1490                          * through the RoCE GID table */
1491                         *net_dev = NULL;
1492                 } else {
1493                         return ERR_CAST(*net_dev);
1494                 }
1495         }
1496
1497         bind_list = cma_ps_find(*net_dev ? dev_net(*net_dev) : &init_net,
1498                                 rdma_ps_from_service_id(req.service_id),
1499                                 cma_port_from_service_id(req.service_id));
1500         id_priv = cma_find_listener(bind_list, cm_id, ib_event, &req, *net_dev);
1501         if (IS_ERR(id_priv) && *net_dev) {
1502                 dev_put(*net_dev);
1503                 *net_dev = NULL;
1504         }
1505
1506         return id_priv;
1507 }
1508
1509 static inline int cma_user_data_offset(struct rdma_id_private *id_priv)
1510 {
1511         return cma_family(id_priv) == AF_IB ? 0 : sizeof(struct cma_hdr);
1512 }
1513
1514 static void cma_cancel_route(struct rdma_id_private *id_priv)
1515 {
1516         if (rdma_cap_ib_sa(id_priv->id.device, id_priv->id.port_num)) {
1517                 if (id_priv->query)
1518                         ib_sa_cancel_query(id_priv->query_id, id_priv->query);
1519         }
1520 }
1521
1522 static void cma_cancel_listens(struct rdma_id_private *id_priv)
1523 {
1524         struct rdma_id_private *dev_id_priv;
1525
1526         /*
1527          * Remove from listen_any_list to prevent added devices from spawning
1528          * additional listen requests.
1529          */
1530         mutex_lock(&lock);
1531         list_del(&id_priv->list);
1532
1533         while (!list_empty(&id_priv->listen_list)) {
1534                 dev_id_priv = list_entry(id_priv->listen_list.next,
1535                                          struct rdma_id_private, listen_list);
1536                 /* sync with device removal to avoid duplicate destruction */
1537                 list_del_init(&dev_id_priv->list);
1538                 list_del(&dev_id_priv->listen_list);
1539                 mutex_unlock(&lock);
1540
1541                 rdma_destroy_id(&dev_id_priv->id);
1542                 mutex_lock(&lock);
1543         }
1544         mutex_unlock(&lock);
1545 }
1546
1547 static void cma_cancel_operation(struct rdma_id_private *id_priv,
1548                                  enum rdma_cm_state state)
1549 {
1550         switch (state) {
1551         case RDMA_CM_ADDR_QUERY:
1552                 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
1553                 break;
1554         case RDMA_CM_ROUTE_QUERY:
1555                 cma_cancel_route(id_priv);
1556                 break;
1557         case RDMA_CM_LISTEN:
1558                 if (cma_any_addr(cma_src_addr(id_priv)) && !id_priv->cma_dev)
1559                         cma_cancel_listens(id_priv);
1560                 break;
1561         default:
1562                 break;
1563         }
1564 }
1565
1566 static void cma_release_port(struct rdma_id_private *id_priv)
1567 {
1568         struct rdma_bind_list *bind_list = id_priv->bind_list;
1569         struct vnet *net = id_priv->id.route.addr.dev_addr.net;
1570
1571         if (!bind_list)
1572                 return;
1573
1574         mutex_lock(&lock);
1575         hlist_del(&id_priv->node);
1576         if (hlist_empty(&bind_list->owners)) {
1577                 cma_ps_remove(net, bind_list->ps, bind_list->port);
1578                 kfree(bind_list);
1579         }
1580         mutex_unlock(&lock);
1581 }
1582
1583 static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
1584 {
1585         struct cma_multicast *mc;
1586
1587         while (!list_empty(&id_priv->mc_list)) {
1588                 mc = container_of(id_priv->mc_list.next,
1589                                   struct cma_multicast, list);
1590                 list_del(&mc->list);
1591                 if (rdma_cap_ib_mcast(id_priv->cma_dev->device,
1592                                       id_priv->id.port_num)) {
1593                         ib_sa_free_multicast(mc->multicast.ib);
1594                         kfree(mc);
1595                 } else {
1596                         if (mc->igmp_joined) {
1597                                 struct rdma_dev_addr *dev_addr =
1598                                         &id_priv->id.route.addr.dev_addr;
1599                                 struct net_device *ndev = NULL;
1600
1601                                 if (dev_addr->bound_dev_if)
1602                                         ndev = dev_get_by_index(dev_addr->net,
1603                                                                 dev_addr->bound_dev_if);
1604                                 if (ndev) {
1605                                         dev_put(ndev);
1606                                 }
1607                         }
1608                         kref_put(&mc->mcref, release_mc);
1609                 }
1610         }
1611 }
1612
1613 void rdma_destroy_id(struct rdma_cm_id *id)
1614 {
1615         struct rdma_id_private *id_priv;
1616         enum rdma_cm_state state;
1617
1618         id_priv = container_of(id, struct rdma_id_private, id);
1619         state = cma_exch(id_priv, RDMA_CM_DESTROYING);
1620         cma_cancel_operation(id_priv, state);
1621
1622         /*
1623          * Wait for any active callback to finish.  New callbacks will find
1624          * the id_priv state set to destroying and abort.
1625          */
1626         mutex_lock(&id_priv->handler_mutex);
1627         mutex_unlock(&id_priv->handler_mutex);
1628
1629         if (id_priv->cma_dev) {
1630                 if (rdma_cap_ib_cm(id_priv->id.device, 1)) {
1631                         if (id_priv->cm_id.ib)
1632                                 ib_destroy_cm_id(id_priv->cm_id.ib);
1633                 } else if (rdma_cap_iw_cm(id_priv->id.device, 1)) {
1634                         if (id_priv->cm_id.iw)
1635                                 iw_destroy_cm_id(id_priv->cm_id.iw);
1636                 }
1637                 cma_leave_mc_groups(id_priv);
1638                 cma_release_dev(id_priv);
1639         }
1640
1641         cma_release_port(id_priv);
1642         cma_deref_id(id_priv);
1643         wait_for_completion(&id_priv->comp);
1644
1645         if (id_priv->internal_id)
1646                 cma_deref_id(id_priv->id.context);
1647
1648         kfree(id_priv->id.route.path_rec);
1649         kfree(id_priv);
1650 }
1651 EXPORT_SYMBOL(rdma_destroy_id);
1652
1653 static int cma_rep_recv(struct rdma_id_private *id_priv)
1654 {
1655         int ret;
1656
1657         ret = cma_modify_qp_rtr(id_priv, NULL);
1658         if (ret)
1659                 goto reject;
1660
1661         ret = cma_modify_qp_rts(id_priv, NULL);
1662         if (ret)
1663                 goto reject;
1664
1665         ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
1666         if (ret)
1667                 goto reject;
1668
1669         return 0;
1670 reject:
1671         cma_modify_qp_err(id_priv);
1672         ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
1673                        NULL, 0, NULL, 0);
1674         return ret;
1675 }
1676
1677 static void cma_set_rep_event_data(struct rdma_cm_event *event,
1678                                    struct ib_cm_rep_event_param *rep_data,
1679                                    void *private_data)
1680 {
1681         event->param.conn.private_data = private_data;
1682         event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
1683         event->param.conn.responder_resources = rep_data->responder_resources;
1684         event->param.conn.initiator_depth = rep_data->initiator_depth;
1685         event->param.conn.flow_control = rep_data->flow_control;
1686         event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
1687         event->param.conn.srq = rep_data->srq;
1688         event->param.conn.qp_num = rep_data->remote_qpn;
1689 }
1690
1691 static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1692 {
1693         struct rdma_id_private *id_priv = cm_id->context;
1694         struct rdma_cm_event event;
1695         int ret = 0;
1696
1697         mutex_lock(&id_priv->handler_mutex);
1698         if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
1699              id_priv->state != RDMA_CM_CONNECT) ||
1700             (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
1701              id_priv->state != RDMA_CM_DISCONNECT))
1702                 goto out;
1703
1704         memset(&event, 0, sizeof event);
1705         switch (ib_event->event) {
1706         case IB_CM_REQ_ERROR:
1707         case IB_CM_REP_ERROR:
1708                 event.event = RDMA_CM_EVENT_UNREACHABLE;
1709                 event.status = -ETIMEDOUT;
1710                 break;
1711         case IB_CM_REP_RECEIVED:
1712                 if (id_priv->id.qp) {
1713                         event.status = cma_rep_recv(id_priv);
1714                         event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
1715                                                      RDMA_CM_EVENT_ESTABLISHED;
1716                 } else {
1717                         event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
1718                 }
1719                 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
1720                                        ib_event->private_data);
1721                 break;
1722         case IB_CM_RTU_RECEIVED:
1723         case IB_CM_USER_ESTABLISHED:
1724                 event.event = RDMA_CM_EVENT_ESTABLISHED;
1725                 break;
1726         case IB_CM_DREQ_ERROR:
1727                 event.status = -ETIMEDOUT; /* fall through */
1728         case IB_CM_DREQ_RECEIVED:
1729         case IB_CM_DREP_RECEIVED:
1730                 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT,
1731                                    RDMA_CM_DISCONNECT))
1732                         goto out;
1733                 event.event = RDMA_CM_EVENT_DISCONNECTED;
1734                 break;
1735         case IB_CM_TIMEWAIT_EXIT:
1736                 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
1737                 break;
1738         case IB_CM_MRA_RECEIVED:
1739                 /* ignore event */
1740                 goto out;
1741         case IB_CM_REJ_RECEIVED:
1742                 cma_modify_qp_err(id_priv);
1743                 event.status = ib_event->param.rej_rcvd.reason;
1744                 event.event = RDMA_CM_EVENT_REJECTED;
1745                 event.param.conn.private_data = ib_event->private_data;
1746                 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
1747                 break;
1748         default:
1749                 pr_err("RDMA CMA: unexpected IB CM event: %d\n",
1750                        ib_event->event);
1751                 goto out;
1752         }
1753
1754         ret = id_priv->id.event_handler(&id_priv->id, &event);
1755         if (ret) {
1756                 /* Destroy the CM ID by returning a non-zero value. */
1757                 id_priv->cm_id.ib = NULL;
1758                 cma_exch(id_priv, RDMA_CM_DESTROYING);
1759                 mutex_unlock(&id_priv->handler_mutex);
1760                 rdma_destroy_id(&id_priv->id);
1761                 return ret;
1762         }
1763 out:
1764         mutex_unlock(&id_priv->handler_mutex);
1765         return ret;
1766 }
1767
1768 static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
1769                                                struct ib_cm_event *ib_event,
1770                                                struct net_device *net_dev)
1771 {
1772         struct rdma_id_private *id_priv;
1773         struct rdma_cm_id *id;
1774         struct rdma_route *rt;
1775         const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
1776         const __be64 service_id =
1777                       ib_event->param.req_rcvd.primary_path->service_id;
1778         int ret;
1779
1780         id = rdma_create_id(listen_id->route.addr.dev_addr.net,
1781                             listen_id->event_handler, listen_id->context,
1782                             listen_id->ps, ib_event->param.req_rcvd.qp_type);
1783         if (IS_ERR(id))
1784                 return NULL;
1785
1786         id_priv = container_of(id, struct rdma_id_private, id);
1787         if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
1788                               (struct sockaddr *)&id->route.addr.dst_addr,
1789                               listen_id, ib_event, ss_family, service_id))
1790                 goto err;
1791
1792         rt = &id->route;
1793         rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
1794         rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
1795                                GFP_KERNEL);
1796         if (!rt->path_rec)
1797                 goto err;
1798
1799         rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
1800         if (rt->num_paths == 2)
1801                 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1802
1803         if (net_dev) {
1804                 ret = rdma_copy_addr(&rt->addr.dev_addr, net_dev, NULL);
1805                 if (ret)
1806                         goto err;
1807         } else {
1808                 if (!cma_protocol_roce(listen_id) &&
1809                     cma_any_addr(cma_src_addr(id_priv))) {
1810                         rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
1811                         rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
1812                         ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
1813                 } else if (!cma_any_addr(cma_src_addr(id_priv))) {
1814                         ret = cma_translate_addr(cma_src_addr(id_priv), &rt->addr.dev_addr);
1815                         if (ret)
1816                                 goto err;
1817                 }
1818         }
1819         rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
1820
1821         id_priv->state = RDMA_CM_CONNECT;
1822         return id_priv;
1823
1824 err:
1825         rdma_destroy_id(id);
1826         return NULL;
1827 }
1828
1829 static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
1830                                               struct ib_cm_event *ib_event,
1831                                               struct net_device *net_dev)
1832 {
1833         struct rdma_id_private *id_priv;
1834         struct rdma_cm_id *id;
1835         const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
1836         struct vnet *net = listen_id->route.addr.dev_addr.net;
1837         int ret;
1838
1839         id = rdma_create_id(net, listen_id->event_handler, listen_id->context,
1840                             listen_id->ps, IB_QPT_UD);
1841         if (IS_ERR(id))
1842                 return NULL;
1843
1844         id_priv = container_of(id, struct rdma_id_private, id);
1845         if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
1846                               (struct sockaddr *)&id->route.addr.dst_addr,
1847                               listen_id, ib_event, ss_family,
1848                               ib_event->param.sidr_req_rcvd.service_id))
1849                 goto err;
1850
1851         if (net_dev) {
1852                 ret = rdma_copy_addr(&id->route.addr.dev_addr, net_dev, NULL);
1853                 if (ret)
1854                         goto err;
1855         } else {
1856                 if (!cma_any_addr(cma_src_addr(id_priv))) {
1857                         ret = cma_translate_addr(cma_src_addr(id_priv),
1858                                                  &id->route.addr.dev_addr);
1859                         if (ret)
1860                                 goto err;
1861                 }
1862         }
1863
1864         id_priv->state = RDMA_CM_CONNECT;
1865         return id_priv;
1866 err:
1867         rdma_destroy_id(id);
1868         return NULL;
1869 }
1870
1871 static void cma_set_req_event_data(struct rdma_cm_event *event,
1872                                    struct ib_cm_req_event_param *req_data,
1873                                    void *private_data, int offset)
1874 {
1875         event->param.conn.private_data = (char *)private_data + offset;
1876         event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1877         event->param.conn.responder_resources = req_data->responder_resources;
1878         event->param.conn.initiator_depth = req_data->initiator_depth;
1879         event->param.conn.flow_control = req_data->flow_control;
1880         event->param.conn.retry_count = req_data->retry_count;
1881         event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1882         event->param.conn.srq = req_data->srq;
1883         event->param.conn.qp_num = req_data->remote_qpn;
1884 }
1885
1886 static int cma_check_req_qp_type(struct rdma_cm_id *id, struct ib_cm_event *ib_event)
1887 {
1888         return (((ib_event->event == IB_CM_REQ_RECEIVED) &&
1889                  (ib_event->param.req_rcvd.qp_type == id->qp_type)) ||
1890                 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) &&
1891                  (id->qp_type == IB_QPT_UD)) ||
1892                 (!id->qp_type));
1893 }
1894
1895 static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1896 {
1897         struct rdma_id_private *listen_id, *conn_id = NULL;
1898         struct rdma_cm_event event;
1899         struct net_device *net_dev;
1900         int offset, ret;
1901
1902         listen_id = cma_id_from_event(cm_id, ib_event, &net_dev);
1903         if (IS_ERR(listen_id))
1904                 return PTR_ERR(listen_id);
1905
1906         if (!cma_check_req_qp_type(&listen_id->id, ib_event)) {
1907                 ret = -EINVAL;
1908                 goto net_dev_put;
1909         }
1910
1911         mutex_lock(&listen_id->handler_mutex);
1912         if (listen_id->state != RDMA_CM_LISTEN) {
1913                 ret = -ECONNABORTED;
1914                 goto err1;
1915         }
1916
1917         memset(&event, 0, sizeof event);
1918         offset = cma_user_data_offset(listen_id);
1919         event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1920         if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) {
1921                 conn_id = cma_new_udp_id(&listen_id->id, ib_event, net_dev);
1922                 event.param.ud.private_data = (char *)ib_event->private_data + offset;
1923                 event.param.ud.private_data_len =
1924                                 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1925         } else {
1926                 conn_id = cma_new_conn_id(&listen_id->id, ib_event, net_dev);
1927                 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1928                                        ib_event->private_data, offset);
1929         }
1930         if (!conn_id) {
1931                 ret = -ENOMEM;
1932                 goto err1;
1933         }
1934
1935         mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
1936         ret = cma_acquire_dev(conn_id, listen_id);
1937         if (ret)
1938                 goto err2;
1939
1940         conn_id->cm_id.ib = cm_id;
1941         cm_id->context = conn_id;
1942         cm_id->cm_handler = cma_ib_handler;
1943
1944         /*
1945          * Protect against the user destroying conn_id from another thread
1946          * until we're done accessing it.
1947          */
1948         atomic_inc(&conn_id->refcount);
1949         ret = conn_id->id.event_handler(&conn_id->id, &event);
1950         if (ret)
1951                 goto err3;
1952         /*
1953          * Acquire mutex to prevent user executing rdma_destroy_id()
1954          * while we're accessing the cm_id.
1955          */
1956         mutex_lock(&lock);
1957         if (cma_comp(conn_id, RDMA_CM_CONNECT) &&
1958             (conn_id->id.qp_type != IB_QPT_UD))
1959                 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1960         mutex_unlock(&lock);
1961         mutex_unlock(&conn_id->handler_mutex);
1962         mutex_unlock(&listen_id->handler_mutex);
1963         cma_deref_id(conn_id);
1964         if (net_dev)
1965                 dev_put(net_dev);
1966         return 0;
1967
1968 err3:
1969         cma_deref_id(conn_id);
1970         /* Destroy the CM ID by returning a non-zero value. */
1971         conn_id->cm_id.ib = NULL;
1972 err2:
1973         cma_exch(conn_id, RDMA_CM_DESTROYING);
1974         mutex_unlock(&conn_id->handler_mutex);
1975 err1:
1976         mutex_unlock(&listen_id->handler_mutex);
1977         if (conn_id)
1978                 rdma_destroy_id(&conn_id->id);
1979
1980 net_dev_put:
1981         if (net_dev)
1982                 dev_put(net_dev);
1983
1984         return ret;
1985 }
1986
1987 __be64 rdma_get_service_id(struct rdma_cm_id *id, struct sockaddr *addr)
1988 {
1989         if (addr->sa_family == AF_IB)
1990                 return ((struct sockaddr_ib *) addr)->sib_sid;
1991
1992         return cpu_to_be64(((u64)id->ps << 16) + be16_to_cpu(cma_port(addr)));
1993 }
1994 EXPORT_SYMBOL(rdma_get_service_id);
1995
1996 static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
1997 {
1998         struct rdma_id_private *id_priv = iw_id->context;
1999         struct rdma_cm_event event;
2000         int ret = 0;
2001         struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
2002         struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
2003
2004         mutex_lock(&id_priv->handler_mutex);
2005         if (id_priv->state != RDMA_CM_CONNECT)
2006                 goto out;
2007
2008         memset(&event, 0, sizeof event);
2009         switch (iw_event->event) {
2010         case IW_CM_EVENT_CLOSE:
2011                 event.event = RDMA_CM_EVENT_DISCONNECTED;
2012                 break;
2013         case IW_CM_EVENT_CONNECT_REPLY:
2014                 memcpy(cma_src_addr(id_priv), laddr,
2015                        rdma_addr_size(laddr));
2016                 memcpy(cma_dst_addr(id_priv), raddr,
2017                        rdma_addr_size(raddr));
2018                 switch (iw_event->status) {
2019                 case 0:
2020                         event.event = RDMA_CM_EVENT_ESTABLISHED;
2021                         event.param.conn.initiator_depth = iw_event->ird;
2022                         event.param.conn.responder_resources = iw_event->ord;
2023                         break;
2024                 case -ECONNRESET:
2025                 case -ECONNREFUSED:
2026                         event.event = RDMA_CM_EVENT_REJECTED;
2027                         break;
2028                 case -ETIMEDOUT:
2029                         event.event = RDMA_CM_EVENT_UNREACHABLE;
2030                         break;
2031                 default:
2032                         event.event = RDMA_CM_EVENT_CONNECT_ERROR;
2033                         break;
2034                 }
2035                 break;
2036         case IW_CM_EVENT_ESTABLISHED:
2037                 event.event = RDMA_CM_EVENT_ESTABLISHED;
2038                 event.param.conn.initiator_depth = iw_event->ird;
2039                 event.param.conn.responder_resources = iw_event->ord;
2040                 break;
2041         default:
2042                 BUG_ON(1);
2043         }
2044
2045         event.status = iw_event->status;
2046         event.param.conn.private_data = iw_event->private_data;
2047         event.param.conn.private_data_len = iw_event->private_data_len;
2048         ret = id_priv->id.event_handler(&id_priv->id, &event);
2049         if (ret) {
2050                 /* Destroy the CM ID by returning a non-zero value. */
2051                 id_priv->cm_id.iw = NULL;
2052                 cma_exch(id_priv, RDMA_CM_DESTROYING);
2053                 mutex_unlock(&id_priv->handler_mutex);
2054                 rdma_destroy_id(&id_priv->id);
2055                 return ret;
2056         }
2057
2058 out:
2059         mutex_unlock(&id_priv->handler_mutex);
2060         return ret;
2061 }
2062
2063 static int iw_conn_req_handler(struct iw_cm_id *cm_id,
2064                                struct iw_cm_event *iw_event)
2065 {
2066         struct rdma_cm_id *new_cm_id;
2067         struct rdma_id_private *listen_id, *conn_id;
2068         struct rdma_cm_event event;
2069         int ret = -ECONNABORTED;
2070         struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
2071         struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
2072
2073         listen_id = cm_id->context;
2074
2075         mutex_lock(&listen_id->handler_mutex);
2076         if (listen_id->state != RDMA_CM_LISTEN)
2077                 goto out;
2078
2079         /* Create a new RDMA id for the new IW CM ID */
2080         new_cm_id = rdma_create_id(listen_id->id.route.addr.dev_addr.net,
2081                                    listen_id->id.event_handler,
2082                                    listen_id->id.context,
2083                                    RDMA_PS_TCP, IB_QPT_RC);
2084         if (IS_ERR(new_cm_id)) {
2085                 ret = -ENOMEM;
2086                 goto out;
2087         }
2088         conn_id = container_of(new_cm_id, struct rdma_id_private, id);
2089         mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
2090         conn_id->state = RDMA_CM_CONNECT;
2091
2092         ret = rdma_translate_ip(laddr, &conn_id->id.route.addr.dev_addr, NULL);
2093         if (ret) {
2094                 mutex_unlock(&conn_id->handler_mutex);
2095                 rdma_destroy_id(new_cm_id);
2096                 goto out;
2097         }
2098
2099         ret = cma_acquire_dev(conn_id, listen_id);
2100         if (ret) {
2101                 mutex_unlock(&conn_id->handler_mutex);
2102                 rdma_destroy_id(new_cm_id);
2103                 goto out;
2104         }
2105
2106         conn_id->cm_id.iw = cm_id;
2107         cm_id->context = conn_id;
2108         cm_id->cm_handler = cma_iw_handler;
2109
2110         memcpy(cma_src_addr(conn_id), laddr, rdma_addr_size(laddr));
2111         memcpy(cma_dst_addr(conn_id), raddr, rdma_addr_size(raddr));
2112
2113         memset(&event, 0, sizeof event);
2114         event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
2115         event.param.conn.private_data = iw_event->private_data;
2116         event.param.conn.private_data_len = iw_event->private_data_len;
2117         event.param.conn.initiator_depth = iw_event->ird;
2118         event.param.conn.responder_resources = iw_event->ord;
2119
2120         /*
2121          * Protect against the user destroying conn_id from another thread
2122          * until we're done accessing it.
2123          */
2124         atomic_inc(&conn_id->refcount);
2125         ret = conn_id->id.event_handler(&conn_id->id, &event);
2126         if (ret) {
2127                 /* User wants to destroy the CM ID */
2128                 conn_id->cm_id.iw = NULL;
2129                 cma_exch(conn_id, RDMA_CM_DESTROYING);
2130                 mutex_unlock(&conn_id->handler_mutex);
2131                 cma_deref_id(conn_id);
2132                 rdma_destroy_id(&conn_id->id);
2133                 goto out;
2134         }
2135
2136         mutex_unlock(&conn_id->handler_mutex);
2137         cma_deref_id(conn_id);
2138
2139 out:
2140         mutex_unlock(&listen_id->handler_mutex);
2141         return ret;
2142 }
2143
2144 static int cma_ib_listen(struct rdma_id_private *id_priv)
2145 {
2146         struct sockaddr *addr;
2147         struct ib_cm_id *id;
2148         __be64 svc_id;
2149
2150         addr = cma_src_addr(id_priv);
2151         svc_id = rdma_get_service_id(&id_priv->id, addr);
2152         id = ib_cm_insert_listen(id_priv->id.device, cma_req_handler, svc_id);
2153         if (IS_ERR(id))
2154                 return PTR_ERR(id);
2155         id_priv->cm_id.ib = id;
2156
2157         return 0;
2158 }
2159
2160 static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
2161 {
2162         int ret;
2163         struct iw_cm_id *id;
2164
2165         id = iw_create_cm_id(id_priv->id.device,
2166                              iw_conn_req_handler,
2167                              id_priv);
2168         if (IS_ERR(id))
2169                 return PTR_ERR(id);
2170
2171         id->tos = id_priv->tos;
2172         id_priv->cm_id.iw = id;
2173
2174         memcpy(&id_priv->cm_id.iw->local_addr, cma_src_addr(id_priv),
2175                rdma_addr_size(cma_src_addr(id_priv)));
2176
2177         ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
2178
2179         if (ret) {
2180                 iw_destroy_cm_id(id_priv->cm_id.iw);
2181                 id_priv->cm_id.iw = NULL;
2182         }
2183
2184         return ret;
2185 }
2186
2187 static int cma_listen_handler(struct rdma_cm_id *id,
2188                               struct rdma_cm_event *event)
2189 {
2190         struct rdma_id_private *id_priv = id->context;
2191
2192         id->context = id_priv->id.context;
2193         id->event_handler = id_priv->id.event_handler;
2194         return id_priv->id.event_handler(id, event);
2195 }
2196
2197 static void cma_listen_on_dev(struct rdma_id_private *id_priv,
2198                               struct cma_device *cma_dev)
2199 {
2200         struct rdma_id_private *dev_id_priv;
2201         struct rdma_cm_id *id;
2202         struct vnet *net = id_priv->id.route.addr.dev_addr.net;
2203         int ret;
2204
2205         if (cma_family(id_priv) == AF_IB && !rdma_cap_ib_cm(cma_dev->device, 1))
2206                 return;
2207
2208         id = rdma_create_id(net, cma_listen_handler, id_priv, id_priv->id.ps,
2209                             id_priv->id.qp_type);
2210         if (IS_ERR(id))
2211                 return;
2212
2213         dev_id_priv = container_of(id, struct rdma_id_private, id);
2214
2215         dev_id_priv->state = RDMA_CM_ADDR_BOUND;
2216         memcpy(cma_src_addr(dev_id_priv), cma_src_addr(id_priv),
2217                rdma_addr_size(cma_src_addr(id_priv)));
2218
2219         _cma_attach_to_dev(dev_id_priv, cma_dev);
2220         list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
2221         atomic_inc(&id_priv->refcount);
2222         dev_id_priv->internal_id = 1;
2223         dev_id_priv->afonly = id_priv->afonly;
2224
2225         ret = rdma_listen(id, id_priv->backlog);
2226         if (ret)
2227                 pr_warn("RDMA CMA: cma_listen_on_dev, error %d, listening on device %s\n",
2228                         ret, cma_dev->device->name);
2229 }
2230
2231 static void cma_listen_on_all(struct rdma_id_private *id_priv)
2232 {
2233         struct cma_device *cma_dev;
2234
2235         mutex_lock(&lock);
2236         list_add_tail(&id_priv->list, &listen_any_list);
2237         list_for_each_entry(cma_dev, &dev_list, list)
2238                 cma_listen_on_dev(id_priv, cma_dev);
2239         mutex_unlock(&lock);
2240 }
2241
2242 void rdma_set_service_type(struct rdma_cm_id *id, int tos)
2243 {
2244         struct rdma_id_private *id_priv;
2245
2246         id_priv = container_of(id, struct rdma_id_private, id);
2247         id_priv->tos = (u8) tos;
2248 }
2249 EXPORT_SYMBOL(rdma_set_service_type);
2250
2251 static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
2252                               void *context)
2253 {
2254         struct cma_work *work = context;
2255         struct rdma_route *route;
2256
2257         route = &work->id->id.route;
2258
2259         if (!status) {
2260                 route->num_paths = 1;
2261                 *route->path_rec = *path_rec;
2262         } else {
2263                 work->old_state = RDMA_CM_ROUTE_QUERY;
2264                 work->new_state = RDMA_CM_ADDR_RESOLVED;
2265                 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
2266                 work->event.status = status;
2267         }
2268
2269         queue_work(cma_wq, &work->work);
2270 }
2271
2272 static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
2273                               struct cma_work *work)
2274 {
2275         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2276         struct ib_sa_path_rec path_rec;
2277         ib_sa_comp_mask comp_mask;
2278         struct sockaddr_in6 *sin6;
2279         struct sockaddr_ib *sib;
2280
2281         memset(&path_rec, 0, sizeof path_rec);
2282         rdma_addr_get_sgid(dev_addr, &path_rec.sgid);
2283         rdma_addr_get_dgid(dev_addr, &path_rec.dgid);
2284         path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
2285         path_rec.numb_path = 1;
2286         path_rec.reversible = 1;
2287         path_rec.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
2288
2289         comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
2290                     IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
2291                     IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
2292
2293         switch (cma_family(id_priv)) {
2294         case AF_INET:
2295                 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
2296                 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
2297                 break;
2298         case AF_INET6:
2299                 sin6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
2300                 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
2301                 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
2302                 break;
2303         case AF_IB:
2304                 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
2305                 path_rec.traffic_class = (u8) (be32_to_cpu(sib->sib_flowinfo) >> 20);
2306                 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
2307                 break;
2308         }
2309
2310         id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
2311                                                id_priv->id.port_num, &path_rec,
2312                                                comp_mask, timeout_ms,
2313                                                GFP_KERNEL, cma_query_handler,
2314                                                work, &id_priv->query);
2315
2316         return (id_priv->query_id < 0) ? id_priv->query_id : 0;
2317 }
2318
2319 static void cma_work_handler(struct work_struct *_work)
2320 {
2321         struct cma_work *work = container_of(_work, struct cma_work, work);
2322         struct rdma_id_private *id_priv = work->id;
2323         int destroy = 0;
2324
2325         mutex_lock(&id_priv->handler_mutex);
2326         if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
2327                 goto out;
2328
2329         if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
2330                 cma_exch(id_priv, RDMA_CM_DESTROYING);
2331                 destroy = 1;
2332         }
2333 out:
2334         mutex_unlock(&id_priv->handler_mutex);
2335         cma_deref_id(id_priv);
2336         if (destroy)
2337                 rdma_destroy_id(&id_priv->id);
2338         kfree(work);
2339 }
2340
2341 static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
2342 {
2343         struct rdma_route *route = &id_priv->id.route;
2344         struct cma_work *work;
2345         int ret;
2346
2347         work = kzalloc(sizeof *work, GFP_KERNEL);
2348         if (!work)
2349                 return -ENOMEM;
2350
2351         work->id = id_priv;
2352         INIT_WORK(&work->work, cma_work_handler);
2353         work->old_state = RDMA_CM_ROUTE_QUERY;
2354         work->new_state = RDMA_CM_ROUTE_RESOLVED;
2355         work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2356
2357         route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
2358         if (!route->path_rec) {
2359                 ret = -ENOMEM;
2360                 goto err1;
2361         }
2362
2363         ret = cma_query_ib_route(id_priv, timeout_ms, work);
2364         if (ret)
2365                 goto err2;
2366
2367         return 0;
2368 err2:
2369         kfree(route->path_rec);
2370         route->path_rec = NULL;
2371 err1:
2372         kfree(work);
2373         return ret;
2374 }
2375
2376 int rdma_set_ib_paths(struct rdma_cm_id *id,
2377                       struct ib_sa_path_rec *path_rec, int num_paths)
2378 {
2379         struct rdma_id_private *id_priv;
2380         int ret;
2381
2382         id_priv = container_of(id, struct rdma_id_private, id);
2383         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2384                            RDMA_CM_ROUTE_RESOLVED))
2385                 return -EINVAL;
2386
2387         id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths,
2388                                      GFP_KERNEL);
2389         if (!id->route.path_rec) {
2390                 ret = -ENOMEM;
2391                 goto err;
2392         }
2393
2394         id->route.num_paths = num_paths;
2395         return 0;
2396 err:
2397         cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED);
2398         return ret;
2399 }
2400 EXPORT_SYMBOL(rdma_set_ib_paths);
2401
2402 static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
2403 {
2404         struct cma_work *work;
2405
2406         work = kzalloc(sizeof *work, GFP_KERNEL);
2407         if (!work)
2408                 return -ENOMEM;
2409
2410         work->id = id_priv;
2411         INIT_WORK(&work->work, cma_work_handler);
2412         work->old_state = RDMA_CM_ROUTE_QUERY;
2413         work->new_state = RDMA_CM_ROUTE_RESOLVED;
2414         work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2415         queue_work(cma_wq, &work->work);
2416         return 0;
2417 }
2418
2419 static int iboe_tos_to_sl(struct net_device *ndev, int tos)
2420 {
2421         /* TODO: Implement this function */
2422         return 0;
2423 }
2424
2425 static enum ib_gid_type cma_route_gid_type(enum rdma_network_type network_type,
2426                                            unsigned long supported_gids,
2427                                            enum ib_gid_type default_gid)
2428 {
2429         if ((network_type == RDMA_NETWORK_IPV4 ||
2430              network_type == RDMA_NETWORK_IPV6) &&
2431             test_bit(IB_GID_TYPE_ROCE_UDP_ENCAP, &supported_gids))
2432                 return IB_GID_TYPE_ROCE_UDP_ENCAP;
2433
2434         return default_gid;
2435 }
2436
2437 static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
2438 {
2439         struct rdma_route *route = &id_priv->id.route;
2440         struct rdma_addr *addr = &route->addr;
2441         struct cma_work *work;
2442         int ret;
2443         struct net_device *ndev = NULL;
2444
2445
2446         work = kzalloc(sizeof *work, GFP_KERNEL);
2447         if (!work)
2448                 return -ENOMEM;
2449
2450         work->id = id_priv;
2451         INIT_WORK(&work->work, cma_work_handler);
2452
2453         route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
2454         if (!route->path_rec) {
2455                 ret = -ENOMEM;
2456                 goto err1;
2457         }
2458
2459         route->num_paths = 1;
2460
2461         if (addr->dev_addr.bound_dev_if) {
2462                 unsigned long supported_gids;
2463
2464                 ndev = dev_get_by_index(addr->dev_addr.net,
2465                                         addr->dev_addr.bound_dev_if);
2466                 if (!ndev) {
2467                         ret = -ENODEV;
2468                         goto err2;
2469                 }
2470
2471                 if (ndev->if_flags & IFF_LOOPBACK) {
2472                         dev_put(ndev);
2473                         if (!id_priv->id.device->get_netdev) {
2474                                 ret = -EOPNOTSUPP;
2475                                 goto err2;
2476                         }
2477
2478                         ndev = id_priv->id.device->get_netdev(id_priv->id.device,
2479                                                               id_priv->id.port_num);
2480                         if (!ndev) {
2481                                 ret = -ENODEV;
2482                                 goto err2;
2483                         }
2484                 }
2485
2486                 route->path_rec->net = ndev->if_vnet;
2487                 route->path_rec->ifindex = ndev->if_index;
2488                 supported_gids = roce_gid_type_mask_support(id_priv->id.device,
2489                                                             id_priv->id.port_num);
2490                 route->path_rec->gid_type =
2491                         cma_route_gid_type(addr->dev_addr.network,
2492                                            supported_gids,
2493                                            id_priv->gid_type);
2494         }
2495         if (!ndev) {
2496                 ret = -ENODEV;
2497                 goto err2;
2498         }
2499
2500         memcpy(route->path_rec->dmac, addr->dev_addr.dst_dev_addr, ETH_ALEN);
2501
2502         rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
2503                     &route->path_rec->sgid);
2504         rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.dst_addr,
2505                     &route->path_rec->dgid);
2506
2507         /* Use the hint from IP Stack to select GID Type */
2508         if (route->path_rec->gid_type < ib_network_to_gid_type(addr->dev_addr.network))
2509                 route->path_rec->gid_type = ib_network_to_gid_type(addr->dev_addr.network);
2510         if (((struct sockaddr *)&id_priv->id.route.addr.dst_addr)->sa_family != AF_IB)
2511                 /* TODO: get the hoplimit from the inet/inet6 device */
2512                 route->path_rec->hop_limit = addr->dev_addr.hoplimit;
2513         else
2514                 route->path_rec->hop_limit = 1;
2515         route->path_rec->reversible = 1;
2516         route->path_rec->pkey = cpu_to_be16(0xffff);
2517         route->path_rec->mtu_selector = IB_SA_EQ;
2518         route->path_rec->sl = iboe_tos_to_sl(ndev, id_priv->tos);
2519         route->path_rec->mtu = iboe_get_mtu(ndev->if_mtu);
2520         route->path_rec->rate_selector = IB_SA_EQ;
2521         route->path_rec->rate = iboe_get_rate(ndev);
2522         dev_put(ndev);
2523         route->path_rec->packet_life_time_selector = IB_SA_EQ;
2524         route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
2525         if (!route->path_rec->mtu) {
2526                 ret = -EINVAL;
2527                 goto err2;
2528         }
2529
2530         work->old_state = RDMA_CM_ROUTE_QUERY;
2531         work->new_state = RDMA_CM_ROUTE_RESOLVED;
2532         work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2533         work->event.status = 0;
2534
2535         queue_work(cma_wq, &work->work);
2536
2537         return 0;
2538
2539 err2:
2540         kfree(route->path_rec);
2541         route->path_rec = NULL;
2542 err1:
2543         kfree(work);
2544         return ret;
2545 }
2546
2547 int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
2548 {
2549         struct rdma_id_private *id_priv;
2550         int ret;
2551
2552         id_priv = container_of(id, struct rdma_id_private, id);
2553         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY))
2554                 return -EINVAL;
2555
2556         atomic_inc(&id_priv->refcount);
2557         if (rdma_cap_ib_sa(id->device, id->port_num))
2558                 ret = cma_resolve_ib_route(id_priv, timeout_ms);
2559         else if (rdma_protocol_roce(id->device, id->port_num))
2560                 ret = cma_resolve_iboe_route(id_priv);
2561         else if (rdma_protocol_iwarp(id->device, id->port_num))
2562                 ret = cma_resolve_iw_route(id_priv, timeout_ms);
2563         else
2564                 ret = -ENOSYS;
2565
2566         if (ret)
2567                 goto err;
2568
2569         return 0;
2570 err:
2571         cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED);
2572         cma_deref_id(id_priv);
2573         return ret;
2574 }
2575 EXPORT_SYMBOL(rdma_resolve_route);
2576
2577 static void cma_set_loopback(struct sockaddr *addr)
2578 {
2579         switch (addr->sa_family) {
2580         case AF_INET:
2581                 ((struct sockaddr_in *) addr)->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
2582                 break;
2583         case AF_INET6:
2584                 ipv6_addr_set(&((struct sockaddr_in6 *) addr)->sin6_addr,
2585                               0, 0, 0, htonl(1));
2586                 break;
2587         default:
2588                 ib_addr_set(&((struct sockaddr_ib *) addr)->sib_addr,
2589                             0, 0, 0, htonl(1));
2590                 break;
2591         }
2592 }
2593
2594 static int cma_bind_loopback(struct rdma_id_private *id_priv)
2595 {
2596         struct cma_device *cma_dev, *cur_dev;
2597         struct ib_port_attr port_attr;
2598         union ib_gid gid;
2599         u16 pkey;
2600         int ret;
2601         u8 p;
2602
2603         cma_dev = NULL;
2604         mutex_lock(&lock);
2605         list_for_each_entry(cur_dev, &dev_list, list) {
2606                 if (cma_family(id_priv) == AF_IB &&
2607                     !rdma_cap_ib_cm(cur_dev->device, 1))
2608                         continue;
2609
2610                 if (!cma_dev)
2611                         cma_dev = cur_dev;
2612
2613                 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
2614                         if (!ib_query_port(cur_dev->device, p, &port_attr) &&
2615                             port_attr.state == IB_PORT_ACTIVE) {
2616                                 cma_dev = cur_dev;
2617                                 goto port_found;
2618                         }
2619                 }
2620         }
2621
2622         if (!cma_dev) {
2623                 ret = -ENODEV;
2624                 goto out;
2625         }
2626
2627         p = 1;
2628
2629 port_found:
2630         ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid, NULL);
2631         if (ret)
2632                 goto out;
2633
2634         ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
2635         if (ret)
2636                 goto out;
2637
2638         id_priv->id.route.addr.dev_addr.dev_type =
2639                 (rdma_protocol_ib(cma_dev->device, p)) ?
2640                 ARPHRD_INFINIBAND : ARPHRD_ETHER;
2641
2642         rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2643         ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
2644         id_priv->id.port_num = p;
2645         cma_attach_to_dev(id_priv, cma_dev);
2646         cma_set_loopback(cma_src_addr(id_priv));
2647 out:
2648         mutex_unlock(&lock);
2649         return ret;
2650 }
2651
2652 static void addr_handler(int status, struct sockaddr *src_addr,
2653                          struct rdma_dev_addr *dev_addr, void *context)
2654 {
2655         struct rdma_id_private *id_priv = context;
2656         struct rdma_cm_event event;
2657
2658         memset(&event, 0, sizeof event);
2659         mutex_lock(&id_priv->handler_mutex);
2660         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY,
2661                            RDMA_CM_ADDR_RESOLVED))
2662                 goto out;
2663
2664         memcpy(cma_src_addr(id_priv), src_addr, rdma_addr_size(src_addr));
2665         if (!status && !id_priv->cma_dev)
2666                 status = cma_acquire_dev(id_priv, NULL);
2667
2668         if (status) {
2669                 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2670                                    RDMA_CM_ADDR_BOUND))
2671                         goto out;
2672                 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2673                 event.status = status;
2674         } else
2675                 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2676
2677         if (id_priv->id.event_handler(&id_priv->id, &event)) {
2678                 cma_exch(id_priv, RDMA_CM_DESTROYING);
2679                 mutex_unlock(&id_priv->handler_mutex);
2680                 cma_deref_id(id_priv);
2681                 rdma_destroy_id(&id_priv->id);
2682                 return;
2683         }
2684 out:
2685         mutex_unlock(&id_priv->handler_mutex);
2686         cma_deref_id(id_priv);
2687 }
2688
2689 static int cma_resolve_loopback(struct rdma_id_private *id_priv)
2690 {
2691         struct cma_work *work;
2692         union ib_gid gid;
2693         int ret;
2694
2695         work = kzalloc(sizeof *work, GFP_KERNEL);
2696         if (!work)
2697                 return -ENOMEM;
2698
2699         if (!id_priv->cma_dev) {
2700                 ret = cma_bind_loopback(id_priv);
2701                 if (ret)
2702                         goto err;
2703         }
2704
2705         rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2706         rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
2707
2708         work->id = id_priv;
2709         INIT_WORK(&work->work, cma_work_handler);
2710         work->old_state = RDMA_CM_ADDR_QUERY;
2711         work->new_state = RDMA_CM_ADDR_RESOLVED;
2712         work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2713         queue_work(cma_wq, &work->work);
2714         return 0;
2715 err:
2716         kfree(work);
2717         return ret;
2718 }
2719
2720 static int cma_resolve_ib_addr(struct rdma_id_private *id_priv)
2721 {
2722         struct cma_work *work;
2723         int ret;
2724
2725         work = kzalloc(sizeof *work, GFP_KERNEL);
2726         if (!work)
2727                 return -ENOMEM;
2728
2729         if (!id_priv->cma_dev) {
2730                 ret = cma_resolve_ib_dev(id_priv);
2731                 if (ret)
2732                         goto err;
2733         }
2734
2735         rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, (union ib_gid *)
2736                 &(((struct sockaddr_ib *) &id_priv->id.route.addr.dst_addr)->sib_addr));
2737
2738         work->id = id_priv;
2739         INIT_WORK(&work->work, cma_work_handler);
2740         work->old_state = RDMA_CM_ADDR_QUERY;
2741         work->new_state = RDMA_CM_ADDR_RESOLVED;
2742         work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2743         queue_work(cma_wq, &work->work);
2744         return 0;
2745 err:
2746         kfree(work);
2747         return ret;
2748 }
2749
2750 static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2751                          struct sockaddr *dst_addr)
2752 {
2753         if (!src_addr || !src_addr->sa_family) {
2754                 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
2755                 src_addr->sa_family = dst_addr->sa_family;
2756                 if (dst_addr->sa_family == AF_INET6) {
2757                         struct sockaddr_in6 *src_addr6 = (struct sockaddr_in6 *) src_addr;
2758                         struct sockaddr_in6 *dst_addr6 = (struct sockaddr_in6 *) dst_addr;
2759                         src_addr6->sin6_scope_id = dst_addr6->sin6_scope_id;
2760                         if (IN6_IS_SCOPE_LINKLOCAL(&dst_addr6->sin6_addr))
2761                                 id->route.addr.dev_addr.bound_dev_if = dst_addr6->sin6_scope_id;
2762                 } else if (dst_addr->sa_family == AF_IB) {
2763                         ((struct sockaddr_ib *) src_addr)->sib_pkey =
2764                                 ((struct sockaddr_ib *) dst_addr)->sib_pkey;
2765                 }
2766         }
2767         return rdma_bind_addr(id, src_addr);
2768 }
2769
2770 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2771                       struct sockaddr *dst_addr, int timeout_ms)
2772 {
2773         struct rdma_id_private *id_priv;
2774         int ret;
2775
2776         id_priv = container_of(id, struct rdma_id_private, id);
2777         if (id_priv->state == RDMA_CM_IDLE) {
2778                 ret = cma_bind_addr(id, src_addr, dst_addr);
2779                 if (ret)
2780                         return ret;
2781         }
2782
2783         if (cma_family(id_priv) != dst_addr->sa_family)
2784                 return -EINVAL;
2785
2786         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY))
2787                 return -EINVAL;
2788
2789         atomic_inc(&id_priv->refcount);
2790         memcpy(cma_dst_addr(id_priv), dst_addr, rdma_addr_size(dst_addr));
2791         if (cma_any_addr(dst_addr)) {
2792                 ret = cma_resolve_loopback(id_priv);
2793         } else {
2794                 if (dst_addr->sa_family == AF_IB) {
2795                         ret = cma_resolve_ib_addr(id_priv);
2796                 } else {
2797                         ret = rdma_resolve_ip(&addr_client, cma_src_addr(id_priv),
2798                                               dst_addr, &id->route.addr.dev_addr,
2799                                               timeout_ms, addr_handler, id_priv);
2800                 }
2801         }
2802         if (ret)
2803                 goto err;
2804
2805         return 0;
2806 err:
2807         cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
2808         cma_deref_id(id_priv);
2809         return ret;
2810 }
2811 EXPORT_SYMBOL(rdma_resolve_addr);
2812
2813 int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
2814 {
2815         struct rdma_id_private *id_priv;
2816         unsigned long flags;
2817         int ret;
2818
2819         id_priv = container_of(id, struct rdma_id_private, id);
2820         spin_lock_irqsave(&id_priv->lock, flags);
2821         if (reuse || id_priv->state == RDMA_CM_IDLE) {
2822                 id_priv->reuseaddr = reuse;
2823                 ret = 0;
2824         } else {
2825                 ret = -EINVAL;
2826         }
2827         spin_unlock_irqrestore(&id_priv->lock, flags);
2828         return ret;
2829 }
2830 EXPORT_SYMBOL(rdma_set_reuseaddr);
2831
2832 int rdma_set_afonly(struct rdma_cm_id *id, int afonly)
2833 {
2834         struct rdma_id_private *id_priv;
2835         unsigned long flags;
2836         int ret;
2837
2838         id_priv = container_of(id, struct rdma_id_private, id);
2839         spin_lock_irqsave(&id_priv->lock, flags);
2840         if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) {
2841                 id_priv->options |= (1 << CMA_OPTION_AFONLY);
2842                 id_priv->afonly = afonly;
2843                 ret = 0;
2844         } else {
2845                 ret = -EINVAL;
2846         }
2847         spin_unlock_irqrestore(&id_priv->lock, flags);
2848         return ret;
2849 }
2850 EXPORT_SYMBOL(rdma_set_afonly);
2851
2852 static void cma_bind_port(struct rdma_bind_list *bind_list,
2853                           struct rdma_id_private *id_priv)
2854 {
2855         struct sockaddr *addr;
2856         struct sockaddr_ib *sib;
2857         u64 sid, mask;
2858         __be16 port;
2859
2860         addr = cma_src_addr(id_priv);
2861         port = htons(bind_list->port);
2862
2863         switch (addr->sa_family) {
2864         case AF_INET:
2865                 ((struct sockaddr_in *) addr)->sin_port = port;
2866                 break;
2867         case AF_INET6:
2868                 ((struct sockaddr_in6 *) addr)->sin6_port = port;
2869                 break;
2870         case AF_IB:
2871                 sib = (struct sockaddr_ib *) addr;
2872                 sid = be64_to_cpu(sib->sib_sid);
2873                 mask = be64_to_cpu(sib->sib_sid_mask);
2874                 sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port));
2875                 sib->sib_sid_mask = cpu_to_be64(~0ULL);
2876                 break;
2877         }
2878         id_priv->bind_list = bind_list;
2879         hlist_add_head(&id_priv->node, &bind_list->owners);
2880 }
2881
2882 static int cma_alloc_port(enum rdma_port_space ps,
2883                           struct rdma_id_private *id_priv, unsigned short snum)
2884 {
2885         struct rdma_bind_list *bind_list;
2886         int ret;
2887
2888         bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
2889         if (!bind_list)
2890                 return -ENOMEM;
2891
2892         ret = cma_ps_alloc(id_priv->id.route.addr.dev_addr.net, ps, bind_list,
2893                            snum);
2894         if (ret < 0)
2895                 goto err;
2896
2897         bind_list->ps = ps;
2898         bind_list->port = (unsigned short)ret;
2899         cma_bind_port(bind_list, id_priv);
2900         return 0;
2901 err:
2902         kfree(bind_list);
2903         return ret == -ENOSPC ? -EADDRNOTAVAIL : ret;
2904 }
2905
2906 static int cma_alloc_any_port(enum rdma_port_space ps,
2907                               struct rdma_id_private *id_priv)
2908 {
2909         static unsigned int last_used_port;
2910         int low, high, remaining;
2911         unsigned int rover;
2912         struct vnet *net = id_priv->id.route.addr.dev_addr.net;
2913         u32 rand;
2914
2915         inet_get_local_port_range(net, &low, &high);
2916         remaining = (high - low) + 1;
2917         get_random_bytes(&rand, sizeof(rand));
2918         rover = rand % remaining + low;
2919 retry:
2920         if (last_used_port != rover &&
2921             !cma_ps_find(net, ps, (unsigned short)rover)) {
2922                 int ret = cma_alloc_port(ps, id_priv, rover);
2923                 /*
2924                  * Remember previously used port number in order to avoid
2925                  * re-using same port immediately after it is closed.
2926                  */
2927                 if (!ret)
2928                         last_used_port = rover;
2929                 if (ret != -EADDRNOTAVAIL)
2930                         return ret;
2931         }
2932         if (--remaining) {
2933                 rover++;
2934                 if ((rover < low) || (rover > high))
2935                         rover = low;
2936                 goto retry;
2937         }
2938         return -EADDRNOTAVAIL;
2939 }
2940
2941 /*
2942  * Check that the requested port is available.  This is called when trying to
2943  * bind to a specific port, or when trying to listen on a bound port.  In
2944  * the latter case, the provided id_priv may already be on the bind_list, but
2945  * we still need to check that it's okay to start listening.
2946  */
2947 static int cma_check_port(struct rdma_bind_list *bind_list,
2948                           struct rdma_id_private *id_priv, uint8_t reuseaddr)
2949 {
2950         struct rdma_id_private *cur_id;
2951         struct sockaddr *addr, *cur_addr;
2952
2953         addr = cma_src_addr(id_priv);
2954         hlist_for_each_entry(cur_id, &bind_list->owners, node) {
2955                 if (id_priv == cur_id)
2956                         continue;
2957
2958                 if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr &&
2959                     cur_id->reuseaddr)
2960                         continue;
2961
2962                 cur_addr = cma_src_addr(cur_id);
2963                 if (id_priv->afonly && cur_id->afonly &&
2964                     (addr->sa_family != cur_addr->sa_family))
2965                         continue;
2966
2967                 if (cma_any_addr(addr) || cma_any_addr(cur_addr))
2968                         return -EADDRNOTAVAIL;
2969
2970                 if (!cma_addr_cmp(addr, cur_addr))
2971                         return -EADDRINUSE;
2972         }
2973         return 0;
2974 }
2975
2976 static int cma_use_port(enum rdma_port_space ps,
2977                         struct rdma_id_private *id_priv)
2978 {
2979         struct rdma_bind_list *bind_list;
2980         unsigned short snum;
2981         int ret;
2982
2983         snum = ntohs(cma_port(cma_src_addr(id_priv)));
2984         if (snum < IPPORT_RESERVED &&
2985             priv_check(curthread, PRIV_NETINET_BINDANY) != 0)
2986                 return -EACCES;
2987
2988         bind_list = cma_ps_find(id_priv->id.route.addr.dev_addr.net, ps, snum);
2989         if (!bind_list) {
2990                 ret = cma_alloc_port(ps, id_priv, snum);
2991         } else {
2992                 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
2993                 if (!ret)
2994                         cma_bind_port(bind_list, id_priv);
2995         }
2996         return ret;
2997 }
2998
2999 static int cma_bind_listen(struct rdma_id_private *id_priv)
3000 {
3001         struct rdma_bind_list *bind_list = id_priv->bind_list;
3002         int ret = 0;
3003
3004         mutex_lock(&lock);
3005         if (bind_list->owners.first->next)
3006                 ret = cma_check_port(bind_list, id_priv, 0);
3007         mutex_unlock(&lock);
3008         return ret;
3009 }
3010
3011 static enum rdma_port_space cma_select_inet_ps(
3012                 struct rdma_id_private *id_priv)
3013 {
3014         switch (id_priv->id.ps) {
3015         case RDMA_PS_TCP:
3016         case RDMA_PS_UDP:
3017         case RDMA_PS_IPOIB:
3018         case RDMA_PS_IB:
3019                 return id_priv->id.ps;
3020         default:
3021
3022                 return 0;
3023         }
3024 }
3025
3026 static enum rdma_port_space cma_select_ib_ps(struct rdma_id_private *id_priv)
3027 {
3028         enum rdma_port_space ps = 0;
3029         struct sockaddr_ib *sib;
3030         u64 sid_ps, mask, sid;
3031
3032         sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
3033         mask = be64_to_cpu(sib->sib_sid_mask) & RDMA_IB_IP_PS_MASK;
3034         sid = be64_to_cpu(sib->sib_sid) & mask;
3035
3036         if ((id_priv->id.ps == RDMA_PS_IB) && (sid == (RDMA_IB_IP_PS_IB & mask))) {
3037                 sid_ps = RDMA_IB_IP_PS_IB;
3038                 ps = RDMA_PS_IB;
3039         } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_TCP)) &&
3040                    (sid == (RDMA_IB_IP_PS_TCP & mask))) {
3041                 sid_ps = RDMA_IB_IP_PS_TCP;
3042                 ps = RDMA_PS_TCP;
3043         } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_UDP)) &&
3044                    (sid == (RDMA_IB_IP_PS_UDP & mask))) {
3045                 sid_ps = RDMA_IB_IP_PS_UDP;
3046                 ps = RDMA_PS_UDP;
3047         }
3048
3049         if (ps) {
3050                 sib->sib_sid = cpu_to_be64(sid_ps | ntohs(cma_port((struct sockaddr *) sib)));
3051                 sib->sib_sid_mask = cpu_to_be64(RDMA_IB_IP_PS_MASK |
3052                                                 be64_to_cpu(sib->sib_sid_mask));
3053         }
3054         return ps;
3055 }
3056
3057 static int cma_get_port(struct rdma_id_private *id_priv)
3058 {
3059         enum rdma_port_space ps;
3060         int ret;
3061
3062         if (cma_family(id_priv) != AF_IB)
3063                 ps = cma_select_inet_ps(id_priv);
3064         else
3065                 ps = cma_select_ib_ps(id_priv);
3066         if (!ps)
3067                 return -EPROTONOSUPPORT;
3068
3069         mutex_lock(&lock);
3070         if (cma_any_port(cma_src_addr(id_priv)))
3071                 ret = cma_alloc_any_port(ps, id_priv);
3072         else
3073                 ret = cma_use_port(ps, id_priv);
3074         mutex_unlock(&lock);
3075
3076         return ret;
3077 }
3078
3079 static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
3080                                struct sockaddr *addr)
3081 {
3082 #ifdef INET6
3083         struct sockaddr_in6 sin6;
3084
3085         if (addr->sa_family != AF_INET6)
3086                 return 0;
3087
3088         sin6 = *(struct sockaddr_in6 *)addr;
3089
3090         if (!(IN6_IS_SCOPE_LINKLOCAL(&sin6.sin6_addr)))
3091                 return 0;
3092
3093         if (sa6_recoverscope(&sin6) || sin6.sin6_scope_id == 0)
3094                 return -EINVAL;
3095
3096         dev_addr->bound_dev_if = sin6.sin6_scope_id;
3097 #endif
3098         return 0;
3099 }
3100
3101 int rdma_listen(struct rdma_cm_id *id, int backlog)
3102 {
3103         struct rdma_id_private *id_priv;
3104         int ret;
3105
3106         id_priv = container_of(id, struct rdma_id_private, id);
3107         if (id_priv->state == RDMA_CM_IDLE) {
3108                 id->route.addr.src_addr.ss_family = AF_INET;
3109                 ret = rdma_bind_addr(id, cma_src_addr(id_priv));
3110                 if (ret)
3111                         return ret;
3112         }
3113
3114         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN))
3115                 return -EINVAL;
3116
3117         if (id_priv->reuseaddr) {
3118                 ret = cma_bind_listen(id_priv);
3119                 if (ret)
3120                         goto err;
3121         }
3122
3123         id_priv->backlog = backlog;
3124         if (id->device) {
3125                 if (rdma_cap_ib_cm(id->device, 1)) {
3126                         ret = cma_ib_listen(id_priv);
3127                         if (ret)
3128                                 goto err;
3129                 } else if (rdma_cap_iw_cm(id->device, 1)) {
3130                         ret = cma_iw_listen(id_priv, backlog);
3131                         if (ret)
3132                                 goto err;
3133                 } else {
3134                         ret = -ENOSYS;
3135                         goto err;
3136                 }
3137         } else
3138                 cma_listen_on_all(id_priv);
3139
3140         return 0;
3141 err:
3142         id_priv->backlog = 0;
3143         cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND);
3144         return ret;
3145 }
3146 EXPORT_SYMBOL(rdma_listen);
3147
3148 int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
3149 {
3150         struct rdma_id_private *id_priv;
3151         int ret;
3152
3153         if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6 &&
3154             addr->sa_family != AF_IB)
3155                 return -EAFNOSUPPORT;
3156
3157         id_priv = container_of(id, struct rdma_id_private, id);
3158         if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND))
3159                 return -EINVAL;
3160
3161         ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
3162         if (ret)
3163                 goto err1;
3164
3165         memcpy(cma_src_addr(id_priv), addr, rdma_addr_size(addr));
3166         if (!cma_any_addr(addr)) {
3167                 ret = cma_translate_addr(addr, &id->route.addr.dev_addr);
3168                 if (ret)
3169                         goto err1;
3170
3171                 ret = cma_acquire_dev(id_priv, NULL);
3172                 if (ret)
3173                         goto err1;
3174         }
3175
3176         if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) {
3177                 if (addr->sa_family == AF_INET)
3178                         id_priv->afonly = 1;
3179 #ifdef INET6
3180                 else if (addr->sa_family == AF_INET6) {
3181                         CURVNET_SET_QUIET(id_priv->id.route.addr.dev_addr.net);
3182                         id_priv->afonly = V_ip6_v6only;
3183                         CURVNET_RESTORE();
3184                 }
3185 #endif
3186         }
3187         ret = cma_get_port(id_priv);
3188         if (ret)
3189                 goto err2;
3190
3191         return 0;
3192 err2:
3193         if (id_priv->cma_dev)
3194                 cma_release_dev(id_priv);
3195 err1:
3196         cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE);
3197         return ret;
3198 }
3199 EXPORT_SYMBOL(rdma_bind_addr);
3200
3201 static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv)
3202 {
3203         struct cma_hdr *cma_hdr;
3204
3205         cma_hdr = hdr;
3206         cma_hdr->cma_version = CMA_VERSION;
3207         if (cma_family(id_priv) == AF_INET) {
3208                 struct sockaddr_in *src4, *dst4;
3209
3210                 src4 = (struct sockaddr_in *) cma_src_addr(id_priv);
3211                 dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv);
3212
3213                 cma_set_ip_ver(cma_hdr, 4);
3214                 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
3215                 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
3216                 cma_hdr->port = src4->sin_port;
3217         } else if (cma_family(id_priv) == AF_INET6) {
3218                 struct sockaddr_in6 *src6, *dst6;
3219
3220                 src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
3221                 dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv);
3222
3223                 cma_set_ip_ver(cma_hdr, 6);
3224                 cma_hdr->src_addr.ip6 = src6->sin6_addr;
3225                 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
3226                 cma_hdr->port = src6->sin6_port;
3227         }
3228         return 0;
3229 }
3230
3231 static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
3232                                 struct ib_cm_event *ib_event)
3233 {
3234         struct rdma_id_private *id_priv = cm_id->context;
3235         struct rdma_cm_event event;
3236         struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
3237         int ret = 0;
3238
3239         mutex_lock(&id_priv->handler_mutex);
3240         if (id_priv->state != RDMA_CM_CONNECT)
3241                 goto out;
3242
3243         memset(&event, 0, sizeof event);
3244         switch (ib_event->event) {
3245         case IB_CM_SIDR_REQ_ERROR:
3246                 event.event = RDMA_CM_EVENT_UNREACHABLE;
3247                 event.status = -ETIMEDOUT;
3248                 break;
3249         case IB_CM_SIDR_REP_RECEIVED:
3250                 event.param.ud.private_data = ib_event->private_data;
3251                 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
3252                 if (rep->status != IB_SIDR_SUCCESS) {
3253                         event.event = RDMA_CM_EVENT_UNREACHABLE;
3254                         event.status = ib_event->param.sidr_rep_rcvd.status;
3255                         break;
3256                 }
3257                 ret = cma_set_qkey(id_priv, rep->qkey);
3258                 if (ret) {
3259                         event.event = RDMA_CM_EVENT_ADDR_ERROR;
3260                         event.status = ret;
3261                         break;
3262                 }
3263                 ret = ib_init_ah_from_path(id_priv->id.device,
3264                                            id_priv->id.port_num,
3265                                            id_priv->id.route.path_rec,
3266                                            &event.param.ud.ah_attr);
3267                 if (ret) {
3268                         event.event = RDMA_CM_EVENT_ADDR_ERROR;
3269                         event.status = ret;
3270                         break;
3271                 }
3272                 event.param.ud.qp_num = rep->qpn;
3273                 event.param.ud.qkey = rep->qkey;
3274                 event.event = RDMA_CM_EVENT_ESTABLISHED;
3275                 event.status = 0;
3276                 break;
3277         default:
3278                 pr_err("RDMA CMA: unexpected IB CM event: %d\n",
3279                        ib_event->event);
3280                 goto out;
3281         }
3282
3283         ret = id_priv->id.event_handler(&id_priv->id, &event);
3284         if (ret) {
3285                 /* Destroy the CM ID by returning a non-zero value. */
3286                 id_priv->cm_id.ib = NULL;
3287                 cma_exch(id_priv, RDMA_CM_DESTROYING);
3288                 mutex_unlock(&id_priv->handler_mutex);
3289                 rdma_destroy_id(&id_priv->id);
3290                 return ret;
3291         }
3292 out:
3293         mutex_unlock(&id_priv->handler_mutex);
3294         return ret;
3295 }
3296
3297 static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
3298                               struct rdma_conn_param *conn_param)
3299 {
3300         struct ib_cm_sidr_req_param req;
3301         struct ib_cm_id *id;
3302         void *private_data;
3303         int offset, ret;
3304
3305         memset(&req, 0, sizeof req);
3306         offset = cma_user_data_offset(id_priv);
3307         req.private_data_len = offset + conn_param->private_data_len;
3308         if (req.private_data_len < conn_param->private_data_len)
3309                 return -EINVAL;
3310
3311         if (req.private_data_len) {
3312                 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
3313                 if (!private_data)
3314                         return -ENOMEM;
3315         } else {
3316                 private_data = NULL;
3317         }
3318
3319         if (conn_param->private_data && conn_param->private_data_len)
3320                 memcpy((char *)private_data + offset, conn_param->private_data,
3321                        conn_param->private_data_len);
3322
3323         if (private_data) {
3324                 ret = cma_format_hdr(private_data, id_priv);
3325                 if (ret)
3326                         goto out;
3327                 req.private_data = private_data;
3328         }
3329
3330         id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler,
3331                              id_priv);
3332         if (IS_ERR(id)) {
3333                 ret = PTR_ERR(id);
3334                 goto out;
3335         }
3336         id_priv->cm_id.ib = id;
3337
3338         req.path = id_priv->id.route.path_rec;
3339         req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
3340         req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
3341         req.max_cm_retries = CMA_MAX_CM_RETRIES;
3342
3343         ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
3344         if (ret) {
3345                 ib_destroy_cm_id(id_priv->cm_id.ib);
3346                 id_priv->cm_id.ib = NULL;
3347         }
3348 out:
3349         kfree(private_data);
3350         return ret;
3351 }
3352
3353 static int cma_connect_ib(struct rdma_id_private *id_priv,
3354                           struct rdma_conn_param *conn_param)
3355 {
3356         struct ib_cm_req_param req;
3357         struct rdma_route *route;
3358         void *private_data;
3359         struct ib_cm_id *id;
3360         int offset, ret;
3361
3362         memset(&req, 0, sizeof req);
3363         offset = cma_user_data_offset(id_priv);
3364         req.private_data_len = offset + conn_param->private_data_len;
3365         if (req.private_data_len < conn_param->private_data_len)
3366                 return -EINVAL;
3367
3368         if (req.private_data_len) {
3369                 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
3370                 if (!private_data)
3371                         return -ENOMEM;
3372         } else {
3373                 private_data = NULL;
3374         }
3375
3376         if (conn_param->private_data && conn_param->private_data_len)
3377                 memcpy((char *)private_data + offset, conn_param->private_data,
3378                        conn_param->private_data_len);
3379
3380         id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv);
3381         if (IS_ERR(id)) {
3382                 ret = PTR_ERR(id);
3383                 goto out;
3384         }
3385         id_priv->cm_id.ib = id;
3386
3387         route = &id_priv->id.route;
3388         if (private_data) {
3389                 ret = cma_format_hdr(private_data, id_priv);
3390                 if (ret)
3391                         goto out;
3392                 req.private_data = private_data;
3393         }
3394
3395         req.primary_path = &route->path_rec[0];
3396         if (route->num_paths == 2)
3397                 req.alternate_path = &route->path_rec[1];
3398
3399         req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
3400         req.qp_num = id_priv->qp_num;
3401         req.qp_type = id_priv->id.qp_type;
3402         req.starting_psn = id_priv->seq_num;
3403         req.responder_resources = conn_param->responder_resources;
3404         req.initiator_depth = conn_param->initiator_depth;
3405         req.flow_control = conn_param->flow_control;
3406         req.retry_count = min_t(u8, 7, conn_param->retry_count);
3407         req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
3408         req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
3409         req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
3410         req.max_cm_retries = CMA_MAX_CM_RETRIES;
3411         req.srq = id_priv->srq ? 1 : 0;
3412
3413         ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
3414 out:
3415         if (ret && !IS_ERR(id)) {
3416                 ib_destroy_cm_id(id);
3417                 id_priv->cm_id.ib = NULL;
3418         }
3419
3420         kfree(private_data);
3421         return ret;
3422 }
3423
3424 static int cma_connect_iw(struct rdma_id_private *id_priv,
3425                           struct rdma_conn_param *conn_param)
3426 {
3427         struct iw_cm_id *cm_id;
3428         int ret;
3429         struct iw_cm_conn_param iw_param;
3430
3431         cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
3432         if (IS_ERR(cm_id))
3433                 return PTR_ERR(cm_id);
3434
3435         cm_id->tos = id_priv->tos;
3436         id_priv->cm_id.iw = cm_id;
3437
3438         memcpy(&cm_id->local_addr, cma_src_addr(id_priv),
3439                rdma_addr_size(cma_src_addr(id_priv)));
3440         memcpy(&cm_id->remote_addr, cma_dst_addr(id_priv),
3441                rdma_addr_size(cma_dst_addr(id_priv)));
3442
3443         ret = cma_modify_qp_rtr(id_priv, conn_param);
3444         if (ret)
3445                 goto out;
3446
3447         if (conn_param) {
3448                 iw_param.ord = conn_param->initiator_depth;
3449                 iw_param.ird = conn_param->responder_resources;
3450                 iw_param.private_data = conn_param->private_data;
3451                 iw_param.private_data_len = conn_param->private_data_len;
3452                 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num;
3453         } else {
3454                 memset(&iw_param, 0, sizeof iw_param);
3455                 iw_param.qpn = id_priv->qp_num;
3456         }
3457         ret = iw_cm_connect(cm_id, &iw_param);
3458 out:
3459         if (ret) {
3460                 iw_destroy_cm_id(cm_id);
3461                 id_priv->cm_id.iw = NULL;
3462         }
3463         return ret;
3464 }
3465
3466 int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
3467 {
3468         struct rdma_id_private *id_priv;
3469         int ret;
3470
3471         id_priv = container_of(id, struct rdma_id_private, id);
3472         if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT))
3473                 return -EINVAL;
3474
3475         if (!id->qp) {
3476                 id_priv->qp_num = conn_param->qp_num;
3477                 id_priv->srq = conn_param->srq;
3478         }
3479
3480         if (rdma_cap_ib_cm(id->device, id->port_num)) {
3481                 if (id->qp_type == IB_QPT_UD)
3482                         ret = cma_resolve_ib_udp(id_priv, conn_param);
3483                 else
3484                         ret = cma_connect_ib(id_priv, conn_param);
3485         } else if (rdma_cap_iw_cm(id->device, id->port_num))
3486                 ret = cma_connect_iw(id_priv, conn_param);
3487         else
3488                 ret = -ENOSYS;
3489         if (ret)
3490                 goto err;
3491
3492         return 0;
3493 err:
3494         cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED);
3495         return ret;
3496 }
3497 EXPORT_SYMBOL(rdma_connect);
3498
3499 static int cma_accept_ib(struct rdma_id_private *id_priv,
3500                          struct rdma_conn_param *conn_param)
3501 {
3502         struct ib_cm_rep_param rep;
3503         int ret;
3504
3505         ret = cma_modify_qp_rtr(id_priv, conn_param);
3506         if (ret)
3507                 goto out;
3508
3509         ret = cma_modify_qp_rts(id_priv, conn_param);
3510         if (ret)
3511                 goto out;
3512
3513         memset(&rep, 0, sizeof rep);
3514         rep.qp_num = id_priv->qp_num;
3515         rep.starting_psn = id_priv->seq_num;
3516         rep.private_data = conn_param->private_data;
3517         rep.private_data_len = conn_param->private_data_len;
3518         rep.responder_resources = conn_param->responder_resources;
3519         rep.initiator_depth = conn_param->initiator_depth;
3520         rep.failover_accepted = 0;
3521         rep.flow_control = conn_param->flow_control;
3522         rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
3523         rep.srq = id_priv->srq ? 1 : 0;
3524
3525         ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
3526 out:
3527         return ret;
3528 }
3529
3530 static int cma_accept_iw(struct rdma_id_private *id_priv,
3531                   struct rdma_conn_param *conn_param)
3532 {
3533         struct iw_cm_conn_param iw_param;
3534         int ret;
3535
3536         ret = cma_modify_qp_rtr(id_priv, conn_param);
3537         if (ret)
3538                 return ret;
3539
3540         iw_param.ord = conn_param->initiator_depth;
3541         iw_param.ird = conn_param->responder_resources;
3542         iw_param.private_data = conn_param->private_data;
3543         iw_param.private_data_len = conn_param->private_data_len;
3544         if (id_priv->id.qp) {
3545                 iw_param.qpn = id_priv->qp_num;
3546         } else
3547                 iw_param.qpn = conn_param->qp_num;
3548
3549         return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
3550 }
3551
3552 static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
3553                              enum ib_cm_sidr_status status, u32 qkey,
3554                              const void *private_data, int private_data_len)
3555 {
3556         struct ib_cm_sidr_rep_param rep;
3557         int ret;
3558
3559         memset(&rep, 0, sizeof rep);
3560         rep.status = status;
3561         if (status == IB_SIDR_SUCCESS) {
3562                 ret = cma_set_qkey(id_priv, qkey);
3563                 if (ret)
3564                         return ret;
3565                 rep.qp_num = id_priv->qp_num;
3566                 rep.qkey = id_priv->qkey;
3567         }
3568         rep.private_data = private_data;
3569         rep.private_data_len = private_data_len;
3570
3571         return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
3572 }
3573
3574 int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
3575 {
3576         struct rdma_id_private *id_priv;
3577         int ret;
3578
3579         id_priv = container_of(id, struct rdma_id_private, id);
3580
3581         id_priv->owner = task_pid_nr(current);
3582
3583         if (!cma_comp(id_priv, RDMA_CM_CONNECT))
3584                 return -EINVAL;
3585
3586         if (!id->qp && conn_param) {
3587                 id_priv->qp_num = conn_param->qp_num;
3588                 id_priv->srq = conn_param->srq;
3589         }
3590
3591         if (rdma_cap_ib_cm(id->device, id->port_num)) {
3592                 if (id->qp_type == IB_QPT_UD) {
3593                         if (conn_param)
3594                                 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
3595                                                         conn_param->qkey,
3596                                                         conn_param->private_data,
3597                                                         conn_param->private_data_len);
3598                         else
3599                                 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
3600                                                         0, NULL, 0);
3601                 } else {
3602                         if (conn_param)
3603                                 ret = cma_accept_ib(id_priv, conn_param);
3604                         else
3605                                 ret = cma_rep_recv(id_priv);
3606                 }
3607         } else if (rdma_cap_iw_cm(id->device, id->port_num))
3608                 ret = cma_accept_iw(id_priv, conn_param);
3609         else
3610                 ret = -ENOSYS;
3611
3612         if (ret)
3613                 goto reject;
3614
3615         return 0;
3616 reject:
3617         cma_modify_qp_err(id_priv);
3618         rdma_reject(id, NULL, 0);
3619         return ret;
3620 }
3621 EXPORT_SYMBOL(rdma_accept);
3622
3623 int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
3624 {
3625         struct rdma_id_private *id_priv;
3626         int ret;
3627
3628         id_priv = container_of(id, struct rdma_id_private, id);
3629         if (!id_priv->cm_id.ib)
3630                 return -EINVAL;
3631
3632         switch (id->device->node_type) {
3633         case RDMA_NODE_IB_CA:
3634                 ret = ib_cm_notify(id_priv->cm_id.ib, event);
3635                 break;
3636         default:
3637                 ret = 0;
3638                 break;
3639         }
3640         return ret;
3641 }
3642 EXPORT_SYMBOL(rdma_notify);
3643
3644 int rdma_reject(struct rdma_cm_id *id, const void *private_data,
3645                 u8 private_data_len)
3646 {
3647         struct rdma_id_private *id_priv;
3648         int ret;
3649
3650         id_priv = container_of(id, struct rdma_id_private, id);
3651         if (!id_priv->cm_id.ib)
3652                 return -EINVAL;
3653
3654         if (rdma_cap_ib_cm(id->device, id->port_num)) {
3655                 if (id->qp_type == IB_QPT_UD)
3656                         ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0,
3657                                                 private_data, private_data_len);
3658                 else
3659                         ret = ib_send_cm_rej(id_priv->cm_id.ib,
3660                                              IB_CM_REJ_CONSUMER_DEFINED, NULL,
3661                                              0, private_data, private_data_len);
3662         } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
3663                 ret = iw_cm_reject(id_priv->cm_id.iw,
3664                                    private_data, private_data_len);
3665         } else
3666                 ret = -ENOSYS;
3667
3668         return ret;
3669 }
3670 EXPORT_SYMBOL(rdma_reject);
3671
3672 int rdma_disconnect(struct rdma_cm_id *id)
3673 {
3674         struct rdma_id_private *id_priv;
3675         int ret;
3676
3677         id_priv = container_of(id, struct rdma_id_private, id);
3678         if (!id_priv->cm_id.ib)
3679                 return -EINVAL;
3680
3681         if (rdma_cap_ib_cm(id->device, id->port_num)) {
3682                 ret = cma_modify_qp_err(id_priv);
3683                 if (ret)
3684                         goto out;
3685                 /* Initiate or respond to a disconnect. */
3686                 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
3687                         ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
3688         } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
3689                 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
3690         } else
3691                 ret = -EINVAL;
3692
3693 out:
3694         return ret;
3695 }
3696 EXPORT_SYMBOL(rdma_disconnect);
3697
3698 static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
3699 {
3700         struct rdma_id_private *id_priv;
3701         struct cma_multicast *mc = multicast->context;
3702         struct rdma_cm_event event;
3703         int ret = 0;
3704
3705         id_priv = mc->id_priv;
3706         mutex_lock(&id_priv->handler_mutex);
3707         if (id_priv->state != RDMA_CM_ADDR_BOUND &&
3708             id_priv->state != RDMA_CM_ADDR_RESOLVED)
3709                 goto out;
3710
3711         if (!status)
3712                 status = cma_set_qkey(id_priv, be32_to_cpu(multicast->rec.qkey));
3713         mutex_lock(&id_priv->qp_mutex);
3714         if (!status && id_priv->id.qp)
3715                 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
3716                                          be16_to_cpu(multicast->rec.mlid));
3717         mutex_unlock(&id_priv->qp_mutex);
3718
3719         memset(&event, 0, sizeof event);
3720         event.status = status;
3721         event.param.ud.private_data = mc->context;
3722         if (!status) {
3723                 struct rdma_dev_addr *dev_addr =
3724                         &id_priv->id.route.addr.dev_addr;
3725                 struct net_device *ndev =
3726                         dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if);
3727                 enum ib_gid_type gid_type =
3728                         id_priv->cma_dev->default_gid_type[id_priv->id.port_num -
3729                         rdma_start_port(id_priv->cma_dev->device)];
3730
3731                 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
3732                 ib_init_ah_from_mcmember(id_priv->id.device,
3733                                          id_priv->id.port_num, &multicast->rec,
3734                                          ndev, gid_type,
3735                                          &event.param.ud.ah_attr);
3736                 event.param.ud.qp_num = 0xFFFFFF;
3737                 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
3738                 if (ndev)
3739                         dev_put(ndev);
3740         } else
3741                 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
3742
3743         ret = id_priv->id.event_handler(&id_priv->id, &event);
3744         if (ret) {
3745                 cma_exch(id_priv, RDMA_CM_DESTROYING);
3746                 mutex_unlock(&id_priv->handler_mutex);
3747                 rdma_destroy_id(&id_priv->id);
3748                 return 0;
3749         }
3750
3751 out:
3752         mutex_unlock(&id_priv->handler_mutex);
3753         return 0;
3754 }
3755
3756 static void cma_set_mgid(struct rdma_id_private *id_priv,
3757                          struct sockaddr *addr, union ib_gid *mgid)
3758 {
3759         unsigned char mc_map[MAX_ADDR_LEN];
3760         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3761         struct sockaddr_in *sin = (struct sockaddr_in *) addr;
3762         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
3763
3764         if (cma_any_addr(addr)) {
3765                 memset(mgid, 0, sizeof *mgid);
3766         } else if ((addr->sa_family == AF_INET6) &&
3767                    ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
3768                                                                  0xFF10A01B)) {
3769                 /* IPv6 address is an SA assigned MGID. */
3770                 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3771         } else if (addr->sa_family == AF_IB) {
3772                 memcpy(mgid, &((struct sockaddr_ib *) addr)->sib_addr, sizeof *mgid);
3773         } else if (addr->sa_family == AF_INET6) {
3774                 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
3775                 if (id_priv->id.ps == RDMA_PS_UDP)
3776                         mc_map[7] = 0x01;       /* Use RDMA CM signature */
3777                 *mgid = *(union ib_gid *) (mc_map + 4);
3778         } else {
3779                 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
3780                 if (id_priv->id.ps == RDMA_PS_UDP)
3781                         mc_map[7] = 0x01;       /* Use RDMA CM signature */
3782                 *mgid = *(union ib_gid *) (mc_map + 4);
3783         }
3784 }
3785
3786 static void cma_query_sa_classport_info_cb(int status,
3787                                            struct ib_class_port_info *rec,
3788                                            void *context)
3789 {
3790         struct class_port_info_context *cb_ctx = context;
3791
3792         WARN_ON(!context);
3793
3794         if (status || !rec) {
3795                 pr_debug("RDMA CM: %s port %u failed query ClassPortInfo status: %d\n",
3796                          cb_ctx->device->name, cb_ctx->port_num, status);
3797                 goto out;
3798         }
3799
3800         memcpy(cb_ctx->class_port_info, rec, sizeof(struct ib_class_port_info));
3801
3802 out:
3803         complete(&cb_ctx->done);
3804 }
3805
3806 static int cma_query_sa_classport_info(struct ib_device *device, u8 port_num,
3807                                        struct ib_class_port_info *class_port_info)
3808 {
3809         struct class_port_info_context *cb_ctx;
3810         int ret;
3811
3812         cb_ctx = kmalloc(sizeof(*cb_ctx), GFP_KERNEL);
3813         if (!cb_ctx)
3814                 return -ENOMEM;
3815
3816         cb_ctx->device = device;
3817         cb_ctx->class_port_info = class_port_info;
3818         cb_ctx->port_num = port_num;
3819         init_completion(&cb_ctx->done);
3820
3821         ret = ib_sa_classport_info_rec_query(&sa_client, device, port_num,
3822                                              CMA_QUERY_CLASSPORT_INFO_TIMEOUT,
3823                                              GFP_KERNEL, cma_query_sa_classport_info_cb,
3824                                              cb_ctx, &cb_ctx->sa_query);
3825         if (ret < 0) {
3826                 pr_err("RDMA CM: %s port %u failed to send ClassPortInfo query, ret: %d\n",
3827                        device->name, port_num, ret);
3828                 goto out;
3829         }
3830
3831         wait_for_completion(&cb_ctx->done);
3832
3833 out:
3834         kfree(cb_ctx);
3835         return ret;
3836 }
3837
3838 static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
3839                                  struct cma_multicast *mc)
3840 {
3841         struct ib_sa_mcmember_rec rec;
3842         struct ib_class_port_info class_port_info;
3843         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3844         ib_sa_comp_mask comp_mask;
3845         int ret;
3846
3847         ib_addr_get_mgid(dev_addr, &rec.mgid);
3848         ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
3849                                      &rec.mgid, &rec);
3850         if (ret)
3851                 return ret;
3852
3853         ret = cma_set_qkey(id_priv, 0);
3854         if (ret)
3855                 return ret;
3856
3857         cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
3858         rec.qkey = cpu_to_be32(id_priv->qkey);
3859         rdma_addr_get_sgid(dev_addr, &rec.port_gid);
3860         rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
3861         rec.join_state = mc->join_state;
3862
3863         if (rec.join_state == BIT(SENDONLY_FULLMEMBER_JOIN)) {
3864                 ret = cma_query_sa_classport_info(id_priv->id.device,
3865                                                   id_priv->id.port_num,
3866                                                   &class_port_info);
3867
3868                 if (ret)
3869                         return ret;
3870
3871                 if (!(ib_get_cpi_capmask2(&class_port_info) &
3872                       IB_SA_CAP_MASK2_SENDONLY_FULL_MEM_SUPPORT)) {
3873                         pr_warn("RDMA CM: %s port %u Unable to multicast join\n"
3874                                 "RDMA CM: SM doesn't support Send Only Full Member option\n",
3875                                 id_priv->id.device->name, id_priv->id.port_num);
3876                         return -EOPNOTSUPP;
3877                 }
3878         }
3879
3880         comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
3881                     IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
3882                     IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
3883                     IB_SA_MCMEMBER_REC_FLOW_LABEL |
3884                     IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
3885
3886         if (id_priv->id.ps == RDMA_PS_IPOIB)
3887                 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
3888                              IB_SA_MCMEMBER_REC_RATE_SELECTOR |
3889                              IB_SA_MCMEMBER_REC_MTU_SELECTOR |
3890                              IB_SA_MCMEMBER_REC_MTU |
3891                              IB_SA_MCMEMBER_REC_HOP_LIMIT;
3892
3893         mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
3894                                                 id_priv->id.port_num, &rec,
3895                                                 comp_mask, GFP_KERNEL,
3896                                                 cma_ib_mc_handler, mc);
3897         return PTR_ERR_OR_ZERO(mc->multicast.ib);
3898 }
3899
3900 static void iboe_mcast_work_handler(struct work_struct *work)
3901 {
3902         struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
3903         struct cma_multicast *mc = mw->mc;
3904         struct ib_sa_multicast *m = mc->multicast.ib;
3905
3906         mc->multicast.ib->context = mc;
3907         cma_ib_mc_handler(0, m);
3908         kref_put(&mc->mcref, release_mc);
3909         kfree(mw);
3910 }
3911
3912 static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid)
3913 {
3914         struct sockaddr_in *sin = (struct sockaddr_in *)addr;
3915         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
3916
3917         if (cma_any_addr(addr)) {
3918                 memset(mgid, 0, sizeof *mgid);
3919         } else if (addr->sa_family == AF_INET6) {
3920                 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3921         } else {
3922                 mgid->raw[0] = 0xff;
3923                 mgid->raw[1] = 0x0e;
3924                 mgid->raw[2] = 0;
3925                 mgid->raw[3] = 0;
3926                 mgid->raw[4] = 0;
3927                 mgid->raw[5] = 0;
3928                 mgid->raw[6] = 0;
3929                 mgid->raw[7] = 0;
3930                 mgid->raw[8] = 0;
3931                 mgid->raw[9] = 0;
3932                 mgid->raw[10] = 0xff;
3933                 mgid->raw[11] = 0xff;
3934                 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
3935         }
3936 }
3937
3938 static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
3939                                    struct cma_multicast *mc)
3940 {
3941         struct iboe_mcast_work *work;
3942         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3943         int err = 0;
3944         struct sockaddr *addr = (struct sockaddr *)&mc->addr;
3945         struct net_device *ndev = NULL;
3946         enum ib_gid_type gid_type;
3947         bool send_only;
3948
3949         send_only = mc->join_state == BIT(SENDONLY_FULLMEMBER_JOIN);
3950
3951         if (cma_zero_addr((struct sockaddr *)&mc->addr))
3952                 return -EINVAL;
3953
3954         work = kzalloc(sizeof *work, GFP_KERNEL);
3955         if (!work)
3956                 return -ENOMEM;
3957
3958         mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
3959         if (!mc->multicast.ib) {
3960                 err = -ENOMEM;
3961                 goto out1;
3962         }
3963
3964         cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid);
3965
3966         mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
3967         if (id_priv->id.ps == RDMA_PS_UDP)
3968                 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
3969
3970         if (dev_addr->bound_dev_if)
3971                 ndev = dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if);
3972         if (!ndev) {
3973                 err = -ENODEV;
3974                 goto out2;
3975         }
3976         mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
3977         mc->multicast.ib->rec.hop_limit = 1;
3978         mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->if_mtu);
3979
3980         gid_type = id_priv->cma_dev->default_gid_type[id_priv->id.port_num -
3981                    rdma_start_port(id_priv->cma_dev->device)];
3982         if (addr->sa_family == AF_INET) {
3983                 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) {
3984                         mc->multicast.ib->rec.hop_limit = IPV6_DEFAULT_HOPLIMIT;
3985                         if (!send_only) {
3986                                 mc->igmp_joined = true;
3987                         }
3988                 }
3989         } else {
3990                 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP)
3991                         err = -ENOTSUPP;
3992         }
3993         dev_put(ndev);
3994         if (err || !mc->multicast.ib->rec.mtu) {
3995                 if (!err)
3996                         err = -EINVAL;
3997                 goto out2;
3998         }
3999         rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
4000                     &mc->multicast.ib->rec.port_gid);
4001         work->id = id_priv;
4002         work->mc = mc;
4003         INIT_WORK(&work->work, iboe_mcast_work_handler);
4004         kref_get(&mc->mcref);
4005         queue_work(cma_wq, &work->work);
4006
4007         return 0;
4008
4009 out2:
4010         kfree(mc->multicast.ib);
4011 out1:
4012         kfree(work);
4013         return err;
4014 }
4015
4016 int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
4017                         u8 join_state, void *context)
4018 {
4019         struct rdma_id_private *id_priv;
4020         struct cma_multicast *mc;
4021         int ret;
4022
4023         id_priv = container_of(id, struct rdma_id_private, id);
4024         if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) &&
4025             !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED))
4026                 return -EINVAL;
4027
4028         mc = kmalloc(sizeof *mc, GFP_KERNEL);
4029         if (!mc)
4030                 return -ENOMEM;
4031
4032         memcpy(&mc->addr, addr, rdma_addr_size(addr));
4033         mc->context = context;
4034         mc->id_priv = id_priv;
4035         mc->igmp_joined = false;
4036         mc->join_state = join_state;
4037         spin_lock(&id_priv->lock);
4038         list_add(&mc->list, &id_priv->mc_list);
4039         spin_unlock(&id_priv->lock);
4040
4041         if (rdma_protocol_roce(id->device, id->port_num)) {
4042                 kref_init(&mc->mcref);
4043                 ret = cma_iboe_join_multicast(id_priv, mc);
4044         } else if (rdma_cap_ib_mcast(id->device, id->port_num))
4045                 ret = cma_join_ib_multicast(id_priv, mc);
4046         else
4047                 ret = -ENOSYS;
4048
4049         if (ret) {
4050                 spin_lock_irq(&id_priv->lock);
4051                 list_del(&mc->list);
4052                 spin_unlock_irq(&id_priv->lock);
4053                 kfree(mc);
4054         }
4055         return ret;
4056 }
4057 EXPORT_SYMBOL(rdma_join_multicast);
4058
4059 void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
4060 {
4061         struct rdma_id_private *id_priv;
4062         struct cma_multicast *mc;
4063
4064         id_priv = container_of(id, struct rdma_id_private, id);
4065         spin_lock_irq(&id_priv->lock);
4066         list_for_each_entry(mc, &id_priv->mc_list, list) {
4067                 if (!memcmp(&mc->addr, addr, rdma_addr_size(addr))) {
4068                         list_del(&mc->list);
4069                         spin_unlock_irq(&id_priv->lock);
4070
4071                         if (id->qp)
4072                                 ib_detach_mcast(id->qp,
4073                                                 &mc->multicast.ib->rec.mgid,
4074                                                 be16_to_cpu(mc->multicast.ib->rec.mlid));
4075
4076                         BUG_ON(id_priv->cma_dev->device != id->device);
4077
4078                         if (rdma_cap_ib_mcast(id->device, id->port_num)) {
4079                                 ib_sa_free_multicast(mc->multicast.ib);
4080                                 kfree(mc);
4081                         } else if (rdma_protocol_roce(id->device, id->port_num)) {
4082                                 if (mc->igmp_joined) {
4083                                         struct rdma_dev_addr *dev_addr =
4084                                                 &id->route.addr.dev_addr;
4085                                         struct net_device *ndev = NULL;
4086
4087                                         if (dev_addr->bound_dev_if)
4088                                                 ndev = dev_get_by_index(dev_addr->net,
4089                                                                         dev_addr->bound_dev_if);
4090                                         if (ndev) {
4091                                                 dev_put(ndev);
4092                                         }
4093                                         mc->igmp_joined = false;
4094                                 }
4095                                 kref_put(&mc->mcref, release_mc);
4096                         }
4097                         return;
4098                 }
4099         }
4100         spin_unlock_irq(&id_priv->lock);
4101 }
4102 EXPORT_SYMBOL(rdma_leave_multicast);
4103
4104 static int
4105 sysctl_cma_default_roce_mode(SYSCTL_HANDLER_ARGS)
4106 {
4107         struct cma_device *cma_dev = arg1;
4108         const int port = arg2;
4109         char buf[64];
4110         int error;
4111
4112         strlcpy(buf, ib_cache_gid_type_str(
4113             cma_get_default_gid_type(cma_dev, port)), sizeof(buf));
4114
4115         error = sysctl_handle_string(oidp, buf, sizeof(buf), req);
4116         if (error != 0 || req->newptr == NULL)
4117                 goto done;
4118
4119         error = ib_cache_gid_parse_type_str(buf);
4120         if (error < 0) {
4121                 error = EINVAL;
4122                 goto done;
4123         }
4124
4125         cma_set_default_gid_type(cma_dev, port, error);
4126         error = 0;
4127 done:
4128         return (error);
4129 }
4130
4131 static void cma_add_one(struct ib_device *device)
4132 {
4133         struct cma_device *cma_dev;
4134         struct rdma_id_private *id_priv;
4135         unsigned int i;
4136         unsigned long supported_gids = 0;
4137
4138         cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
4139         if (!cma_dev)
4140                 return;
4141
4142         sysctl_ctx_init(&cma_dev->sysctl_ctx);
4143
4144         cma_dev->device = device;
4145         cma_dev->default_gid_type = kcalloc(device->phys_port_cnt,
4146                                             sizeof(*cma_dev->default_gid_type),
4147                                             GFP_KERNEL);
4148         if (!cma_dev->default_gid_type) {
4149                 kfree(cma_dev);
4150                 return;
4151         }
4152         for (i = rdma_start_port(device); i <= rdma_end_port(device); i++) {
4153                 supported_gids = roce_gid_type_mask_support(device, i);
4154                 WARN_ON(!supported_gids);
4155                 cma_dev->default_gid_type[i - rdma_start_port(device)] =
4156                         find_first_bit(&supported_gids, BITS_PER_LONG);
4157         }
4158
4159         init_completion(&cma_dev->comp);
4160         atomic_set(&cma_dev->refcount, 1);
4161         INIT_LIST_HEAD(&cma_dev->id_list);
4162         ib_set_client_data(device, &cma_client, cma_dev);
4163
4164         mutex_lock(&lock);
4165         list_add_tail(&cma_dev->list, &dev_list);
4166         list_for_each_entry(id_priv, &listen_any_list, list)
4167                 cma_listen_on_dev(id_priv, cma_dev);
4168         mutex_unlock(&lock);
4169
4170         for (i = rdma_start_port(device); i <= rdma_end_port(device); i++) {
4171                 char buf[64];
4172
4173                 snprintf(buf, sizeof(buf), "default_roce_mode_port%d", i);
4174
4175                 (void) SYSCTL_ADD_PROC(&cma_dev->sysctl_ctx,
4176                     SYSCTL_CHILDREN(device->ports_parent->parent->oidp),
4177                     OID_AUTO, buf, CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE,
4178                     cma_dev, i, &sysctl_cma_default_roce_mode, "A",
4179                     "Default RoCE mode. Valid values: IB/RoCE v1 and RoCE v2");
4180         }
4181 }
4182
4183 static int cma_remove_id_dev(struct rdma_id_private *id_priv)
4184 {
4185         struct rdma_cm_event event;
4186         enum rdma_cm_state state;
4187         int ret = 0;
4188
4189         /* Record that we want to remove the device */
4190         state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL);
4191         if (state == RDMA_CM_DESTROYING)
4192                 return 0;
4193
4194         cma_cancel_operation(id_priv, state);
4195         mutex_lock(&id_priv->handler_mutex);
4196
4197         /* Check for destruction from another callback. */
4198         if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL))
4199                 goto out;
4200
4201         memset(&event, 0, sizeof event);
4202         event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
4203         ret = id_priv->id.event_handler(&id_priv->id, &event);
4204 out:
4205         mutex_unlock(&id_priv->handler_mutex);
4206         return ret;
4207 }
4208
4209 static void cma_process_remove(struct cma_device *cma_dev)
4210 {
4211         struct rdma_id_private *id_priv;
4212         int ret;
4213
4214         mutex_lock(&lock);
4215         while (!list_empty(&cma_dev->id_list)) {
4216                 id_priv = list_entry(cma_dev->id_list.next,
4217                                      struct rdma_id_private, list);
4218
4219                 list_del(&id_priv->listen_list);
4220                 list_del_init(&id_priv->list);
4221                 atomic_inc(&id_priv->refcount);
4222                 mutex_unlock(&lock);
4223
4224                 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
4225                 cma_deref_id(id_priv);
4226                 if (ret)
4227                         rdma_destroy_id(&id_priv->id);
4228
4229                 mutex_lock(&lock);
4230         }
4231         mutex_unlock(&lock);
4232
4233         cma_deref_dev(cma_dev);
4234         wait_for_completion(&cma_dev->comp);
4235 }
4236
4237 static void cma_remove_one(struct ib_device *device, void *client_data)
4238 {
4239         struct cma_device *cma_dev = client_data;
4240
4241         if (!cma_dev)
4242                 return;
4243
4244         mutex_lock(&lock);
4245         list_del(&cma_dev->list);
4246         mutex_unlock(&lock);
4247
4248         cma_process_remove(cma_dev);
4249         sysctl_ctx_free(&cma_dev->sysctl_ctx);
4250         kfree(cma_dev->default_gid_type);
4251         kfree(cma_dev);
4252 }
4253
4254 static void cma_init_vnet(void *arg)
4255 {
4256         struct cma_pernet *pernet = &VNET(cma_pernet);
4257
4258         idr_init(&pernet->tcp_ps);
4259         idr_init(&pernet->udp_ps);
4260         idr_init(&pernet->ipoib_ps);
4261         idr_init(&pernet->ib_ps);
4262 }
4263 VNET_SYSINIT(cma_init_vnet, SI_SUB_OFED_MODINIT - 1, SI_ORDER_FIRST, cma_init_vnet, NULL);
4264
4265 static void cma_destroy_vnet(void *arg)
4266 {
4267         struct cma_pernet *pernet = &VNET(cma_pernet);
4268
4269         idr_destroy(&pernet->tcp_ps);
4270         idr_destroy(&pernet->udp_ps);
4271         idr_destroy(&pernet->ipoib_ps);
4272         idr_destroy(&pernet->ib_ps);
4273 }
4274 VNET_SYSUNINIT(cma_destroy_vnet, SI_SUB_OFED_MODINIT - 1, SI_ORDER_SECOND, cma_destroy_vnet, NULL);
4275
4276 static int __init cma_init(void)
4277 {
4278         int ret;
4279
4280         cma_wq = alloc_ordered_workqueue("rdma_cm", WQ_MEM_RECLAIM);
4281         if (!cma_wq)
4282                 return -ENOMEM;
4283
4284         ib_sa_register_client(&sa_client);
4285         rdma_addr_register_client(&addr_client);
4286
4287         ret = ib_register_client(&cma_client);
4288         if (ret)
4289                 goto err;
4290
4291         cma_configfs_init();
4292
4293         return 0;
4294
4295 err:
4296         rdma_addr_unregister_client(&addr_client);
4297         ib_sa_unregister_client(&sa_client);
4298         destroy_workqueue(cma_wq);
4299         return ret;
4300 }
4301
4302 static void __exit cma_cleanup(void)
4303 {
4304         cma_configfs_exit();
4305         ib_unregister_client(&cma_client);
4306         rdma_addr_unregister_client(&addr_client);
4307         ib_sa_unregister_client(&sa_client);
4308         destroy_workqueue(cma_wq);
4309 }
4310
4311 module_init(cma_init);
4312 module_exit(cma_cleanup);