sys/ofed/drivers/infiniband/core/ib_cma.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0
   3  *
   4  * Copyright (c) 2005 Voltaire Inc.  All rights reserved.
   5  * Copyright (c) 2002-2005, Network Appliance, Inc. All rights reserved.
   6  * Copyright (c) 1999-2005, Mellanox Technologies, Inc. All rights reserved.
   7  * Copyright (c) 2005-2006 Intel Corporation.  All rights reserved.
   8  *
   9  * This software is available to you under a choice of one of two
  10  * licenses.  You may choose to be licensed under the terms of the GNU
  11  * General Public License (GPL) Version 2, available from the file
  12  * COPYING in the main directory of this source tree, or the
  13  * OpenIB.org BSD license below:
  14  *
  15  *     Redistribution and use in source and binary forms, with or
  16  *     without modification, are permitted provided that the following
  17  *     conditions are met:
  18  *
  19  *      - Redistributions of source code must retain the above
  20  *        copyright notice, this list of conditions and the following
  21  *        disclaimer.
  22  *
  23  *      - Redistributions in binary form must reproduce the above
  24  *        copyright notice, this list of conditions and the following
  25  *        disclaimer in the documentation and/or other materials
  26  *        provided with the distribution.
  27  *
  28  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  29  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  30  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  31  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  32  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  33  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  34  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  35  * SOFTWARE.
  36  */
  37
  38 #include <sys/cdefs.h>
  39 __FBSDID("$FreeBSD$");
  40
  41 #define LINUXKPI_PARAM_PREFIX ibcore_
  42
  43 #include <linux/completion.h>
  44 #include <linux/in.h>
  45 #include <linux/in6.h>
  46 #include <linux/mutex.h>
  47 #include <linux/random.h>
  48 #include <linux/idr.h>
  49 #include <linux/inetdevice.h>
  50 #include <linux/slab.h>
  51 #include <linux/module.h>
  52 #include <net/route.h>
  53 #include <net/route/nhop.h>
  54
  55 #include <net/tcp.h>
  56 #include <net/ipv6.h>
  57
  58 #include <netinet/in_fib.h>
  59
  60 #include <netinet6/in6_fib.h>
  61 #include <netinet6/scope6_var.h>
  62 #include <netinet6/ip6_var.h>
  63
  64 #include <rdma/rdma_cm.h>
  65 #include <rdma/rdma_cm_ib.h>
  66 #include <rdma/rdma_sdp.h>
  67 #include <rdma/ib.h>
  68 #include <rdma/ib_addr.h>
  69 #include <rdma/ib_cache.h>
  70 #include <rdma/ib_cm.h>
  71 #include <rdma/ib_sa.h>
  72 #include <rdma/iw_cm.h>
  73
  74 #include <sys/priv.h>
  75
  76 #include "core_priv.h"
  77
  78 MODULE_AUTHOR("Sean Hefty");
  79 MODULE_DESCRIPTION("Generic RDMA CM Agent");
  80 MODULE_LICENSE("Dual BSD/GPL");
  81
  82 #define CMA_CM_RESPONSE_TIMEOUT 20
  83 #define CMA_QUERY_CLASSPORT_INFO_TIMEOUT 3000
  84 #define CMA_MAX_CM_RETRIES 15
  85 #define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
  86 #define CMA_IBOE_PACKET_LIFETIME 18
  87
  88 static const char * const cma_events[] = {
  89         [RDMA_CM_EVENT_ADDR_RESOLVED]    = "address resolved",
  90         [RDMA_CM_EVENT_ADDR_ERROR]       = "address error",
  91         [RDMA_CM_EVENT_ROUTE_RESOLVED]   = "route resolved ",
  92         [RDMA_CM_EVENT_ROUTE_ERROR]      = "route error",
  93         [RDMA_CM_EVENT_CONNECT_REQUEST]  = "connect request",
  94         [RDMA_CM_EVENT_CONNECT_RESPONSE] = "connect response",
  95         [RDMA_CM_EVENT_CONNECT_ERROR]    = "connect error",
  96         [RDMA_CM_EVENT_UNREACHABLE]      = "unreachable",
  97         [RDMA_CM_EVENT_REJECTED]         = "rejected",
  98         [RDMA_CM_EVENT_ESTABLISHED]      = "established",
  99         [RDMA_CM_EVENT_DISCONNECTED]     = "disconnected",
 100         [RDMA_CM_EVENT_DEVICE_REMOVAL]   = "device removal",
 101         [RDMA_CM_EVENT_MULTICAST_JOIN]   = "multicast join",
 102         [RDMA_CM_EVENT_MULTICAST_ERROR]  = "multicast error",
 103         [RDMA_CM_EVENT_ADDR_CHANGE]      = "address change",
 104         [RDMA_CM_EVENT_TIMEWAIT_EXIT]    = "timewait exit",
 105 };
 106
 107 const char *__attribute_const__ rdma_event_msg(enum rdma_cm_event_type event)
 108 {
 109         size_t index = event;
 110
 111         return (index < ARRAY_SIZE(cma_events) && cma_events[index]) ?
 112                         cma_events[index] : "unrecognized event";
 113 }
 114 EXPORT_SYMBOL(rdma_event_msg);
 115
 116 static int cma_check_linklocal(struct rdma_dev_addr *, struct sockaddr *);
 117 static void cma_add_one(struct ib_device *device);
 118 static void cma_remove_one(struct ib_device *device, void *client_data);
 119 static enum rdma_port_space rdma_ps_from_service_id(__be64 service_id);
 120
 121 static struct ib_client cma_client = {
 122         .name   = "cma",
 123         .add    = cma_add_one,
 124         .remove = cma_remove_one
 125 };
 126
 127 static struct ib_sa_client sa_client;
 128 static struct rdma_addr_client addr_client;
 129 static LIST_HEAD(dev_list);
 130 static LIST_HEAD(listen_any_list);
 131 static DEFINE_MUTEX(lock);
 132 static struct workqueue_struct *cma_wq;
 133
 134 struct cma_pernet {
 135         struct idr tcp_ps;
 136         struct idr udp_ps;
 137         struct idr ipoib_ps;
 138         struct idr ib_ps;
 139         struct idr sdp_ps;
 140 };
 141
 142 VNET_DEFINE(struct cma_pernet, cma_pernet);
 143
 144 static struct cma_pernet *cma_pernet_ptr(struct vnet *vnet)
 145 {
 146         struct cma_pernet *retval;
 147
 148         CURVNET_SET_QUIET(vnet);
 149         retval = &VNET(cma_pernet);
 150         CURVNET_RESTORE();
 151
 152         return (retval);
 153 }
 154
 155 static struct idr *cma_pernet_idr(struct vnet *net, enum rdma_port_space ps)
 156 {
 157         struct cma_pernet *pernet = cma_pernet_ptr(net);
 158
 159         switch (ps) {
 160         case RDMA_PS_TCP:
 161                 return &pernet->tcp_ps;
 162         case RDMA_PS_UDP:
 163                 return &pernet->udp_ps;
 164         case RDMA_PS_IPOIB:
 165                 return &pernet->ipoib_ps;
 166         case RDMA_PS_IB:
 167                 return &pernet->ib_ps;
 168         case RDMA_PS_SDP:
 169                 return &pernet->sdp_ps;
 170         default:
 171                 return NULL;
 172         }
 173 }
 174
 175 struct cma_device {
 176         struct list_head        list;
 177         struct ib_device        *device;
 178         struct completion       comp;
 179         atomic_t                refcount;
 180         struct list_head        id_list;
 181         struct sysctl_ctx_list  sysctl_ctx;
 182         enum ib_gid_type        *default_gid_type;
 183 };
 184
 185 struct rdma_bind_list {
 186         enum rdma_port_space    ps;
 187         struct hlist_head       owners;
 188         unsigned short          port;
 189 };
 190
 191 struct class_port_info_context {
 192         struct ib_class_port_info       *class_port_info;
 193         struct ib_device                *device;
 194         struct completion               done;
 195         struct ib_sa_query              *sa_query;
 196         u8                              port_num;
 197 };
 198
 199 static int cma_ps_alloc(struct vnet *vnet, enum rdma_port_space ps,
 200                         struct rdma_bind_list *bind_list, int snum)
 201 {
 202         struct idr *idr = cma_pernet_idr(vnet, ps);
 203
 204         return idr_alloc(idr, bind_list, snum, snum + 1, GFP_KERNEL);
 205 }
 206
 207 static struct rdma_bind_list *cma_ps_find(struct vnet *net,
 208                                           enum rdma_port_space ps, int snum)
 209 {
 210         struct idr *idr = cma_pernet_idr(net, ps);
 211
 212         return idr_find(idr, snum);
 213 }
 214
 215 static void cma_ps_remove(struct vnet *net, enum rdma_port_space ps, int snum)
 216 {
 217         struct idr *idr = cma_pernet_idr(net, ps);
 218
 219         idr_remove(idr, snum);
 220 }
 221
 222 enum {
 223         CMA_OPTION_AFONLY,
 224 };
 225
 226 void cma_ref_dev(struct cma_device *cma_dev)
 227 {
 228         atomic_inc(&cma_dev->refcount);
 229 }
 230
 231 struct cma_device *cma_enum_devices_by_ibdev(cma_device_filter  filter,
 232                                              void               *cookie)
 233 {
 234         struct cma_device *cma_dev;
 235         struct cma_device *found_cma_dev = NULL;
 236
 237         mutex_lock(&lock);
 238
 239         list_for_each_entry(cma_dev, &dev_list, list)
 240                 if (filter(cma_dev->device, cookie)) {
 241                         found_cma_dev = cma_dev;
 242                         break;
 243                 }
 244
 245         if (found_cma_dev)
 246                 cma_ref_dev(found_cma_dev);
 247         mutex_unlock(&lock);
 248         return found_cma_dev;
 249 }
 250
 251 int cma_get_default_gid_type(struct cma_device *cma_dev,
 252                              unsigned int port)
 253 {
 254         if (port < rdma_start_port(cma_dev->device) ||
 255             port > rdma_end_port(cma_dev->device))
 256                 return -EINVAL;
 257
 258         return cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)];
 259 }
 260
 261 int cma_set_default_gid_type(struct cma_device *cma_dev,
 262                              unsigned int port,
 263                              enum ib_gid_type default_gid_type)
 264 {
 265         unsigned long supported_gids;
 266
 267         if (port < rdma_start_port(cma_dev->device) ||
 268             port > rdma_end_port(cma_dev->device))
 269                 return -EINVAL;
 270
 271         supported_gids = roce_gid_type_mask_support(cma_dev->device, port);
 272
 273         if (!(supported_gids & 1 << default_gid_type))
 274                 return -EINVAL;
 275
 276         cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)] =
 277                 default_gid_type;
 278
 279         return 0;
 280 }
 281
 282 struct ib_device *cma_get_ib_dev(struct cma_device *cma_dev)
 283 {
 284         return cma_dev->device;
 285 }
 286
 287 /*
 288  * Device removal can occur at anytime, so we need extra handling to
 289  * serialize notifying the user of device removal with other callbacks.
 290  * We do this by disabling removal notification while a callback is in process,
 291  * and reporting it after the callback completes.
 292  */
 293 struct rdma_id_private {
 294         struct rdma_cm_id       id;
 295
 296         struct rdma_bind_list   *bind_list;
 297         struct hlist_node       node;
 298         struct list_head        list; /* listen_any_list or cma_device.list */
 299         struct list_head        listen_list; /* per device listens */
 300         struct cma_device       *cma_dev;
 301         struct list_head        mc_list;
 302
 303         int                     internal_id;
 304         enum rdma_cm_state      state;
 305         spinlock_t              lock;
 306         struct mutex            qp_mutex;
 307
 308         struct completion       comp;
 309         atomic_t                refcount;
 310         struct mutex            handler_mutex;
 311
 312         int                     backlog;
 313         int                     timeout_ms;
 314         struct ib_sa_query      *query;
 315         int                     query_id;
 316         union {
 317                 struct ib_cm_id *ib;
 318                 struct iw_cm_id *iw;
 319         } cm_id;
 320
 321         u32                     seq_num;
 322         u32                     qkey;
 323         u32                     qp_num;
 324         pid_t                   owner;
 325         u32                     options;
 326         u8                      srq;
 327         u8                      tos;
 328         u8                      reuseaddr;
 329         u8                      afonly;
 330         enum ib_gid_type        gid_type;
 331 };
 332
 333 struct cma_multicast {
 334         struct rdma_id_private *id_priv;
 335         union {
 336                 struct ib_sa_multicast *ib;
 337         } multicast;
 338         struct list_head        list;
 339         void                    *context;
 340         struct sockaddr_storage addr;
 341         struct kref             mcref;
 342         bool                    igmp_joined;
 343         u8                      join_state;
 344 };
 345
 346 struct cma_work {
 347         struct work_struct      work;
 348         struct rdma_id_private  *id;
 349         enum rdma_cm_state      old_state;
 350         enum rdma_cm_state      new_state;
 351         struct rdma_cm_event    event;
 352 };
 353
 354 struct cma_ndev_work {
 355         struct work_struct      work;
 356         struct rdma_id_private  *id;
 357         struct rdma_cm_event    event;
 358 };
 359
 360 struct iboe_mcast_work {
 361         struct work_struct       work;
 362         struct rdma_id_private  *id;
 363         struct cma_multicast    *mc;
 364 };
 365
 366 struct cma_hdr {
 367         u8 cma_version;
 368         u8 ip_version;  /* IP version: 7:4 */
 369         __be16 port;
 370         union cma_ip_addr src_addr;
 371         union cma_ip_addr dst_addr;
 372 };
 373
 374 #define CMA_VERSION 0x00
 375 #define SDP_MAJ_VERSION 0x2
 376
 377 struct cma_req_info {
 378         struct ib_device *device;
 379         int port;
 380         union ib_gid local_gid;
 381         __be64 service_id;
 382         u16 pkey;
 383         bool has_gid:1;
 384 };
 385
 386 static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp)
 387 {
 388         unsigned long flags;
 389         int ret;
 390
 391         spin_lock_irqsave(&id_priv->lock, flags);
 392         ret = (id_priv->state == comp);
 393         spin_unlock_irqrestore(&id_priv->lock, flags);
 394         return ret;
 395 }
 396
 397 static int cma_comp_exch(struct rdma_id_private *id_priv,
 398                          enum rdma_cm_state comp, enum rdma_cm_state exch)
 399 {
 400         unsigned long flags;
 401         int ret;
 402
 403         spin_lock_irqsave(&id_priv->lock, flags);
 404         if ((ret = (id_priv->state == comp)))
 405                 id_priv->state = exch;
 406         spin_unlock_irqrestore(&id_priv->lock, flags);
 407         return ret;
 408 }
 409
 410 static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv,
 411                                    enum rdma_cm_state exch)
 412 {
 413         unsigned long flags;
 414         enum rdma_cm_state old;
 415
 416         spin_lock_irqsave(&id_priv->lock, flags);
 417         old = id_priv->state;
 418         id_priv->state = exch;
 419         spin_unlock_irqrestore(&id_priv->lock, flags);
 420         return old;
 421 }
 422
 423 static inline u8 cma_get_ip_ver(const struct cma_hdr *hdr)
 424 {
 425         return hdr->ip_version >> 4;
 426 }
 427
 428 static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
 429 {
 430         hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
 431 }
 432
 433 static inline u8 sdp_get_majv(u8 sdp_version)
 434 {
 435         return sdp_version >> 4;
 436 }
 437
 438 static inline u8 sdp_get_ip_ver(const struct sdp_hh *hh)
 439 {
 440         return hh->ipv_cap >> 4;
 441 }
 442
 443 static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver)
 444 {
 445         hh->ipv_cap = (ip_ver << 4) | (hh->ipv_cap & 0xF);
 446 }
 447
 448 static int cma_igmp_send(struct net_device *ndev, const union ib_gid *mgid, bool join)
 449 {
 450         int retval;
 451
 452         if (ndev) {
 453                 union rdma_sockaddr addr;
 454
 455                 rdma_gid2ip(&addr._sockaddr, mgid);
 456
 457                 CURVNET_SET_QUIET(ndev->if_vnet);
 458                 if (join)
 459                         retval = -if_addmulti(ndev, &addr._sockaddr, NULL);
 460                 else
 461                         retval = -if_delmulti(ndev, &addr._sockaddr);
 462                 CURVNET_RESTORE();
 463         } else {
 464                 retval = -ENODEV;
 465         }
 466         return retval;
 467 }
 468
 469 static void _cma_attach_to_dev(struct rdma_id_private *id_priv,
 470                                struct cma_device *cma_dev)
 471 {
 472         cma_ref_dev(cma_dev);
 473         id_priv->cma_dev = cma_dev;
 474         id_priv->gid_type = 0;
 475         id_priv->id.device = cma_dev->device;
 476         id_priv->id.route.addr.dev_addr.transport =
 477                 rdma_node_get_transport(cma_dev->device->node_type);
 478         list_add_tail(&id_priv->list, &cma_dev->id_list);
 479 }
 480
 481 static void cma_attach_to_dev(struct rdma_id_private *id_priv,
 482                               struct cma_device *cma_dev)
 483 {
 484         _cma_attach_to_dev(id_priv, cma_dev);
 485         id_priv->gid_type =
 486                 cma_dev->default_gid_type[id_priv->id.port_num -
 487                                           rdma_start_port(cma_dev->device)];
 488 }
 489
 490 void cma_deref_dev(struct cma_device *cma_dev)
 491 {
 492         if (atomic_dec_and_test(&cma_dev->refcount))
 493                 complete(&cma_dev->comp);
 494 }
 495
 496 static inline void release_mc(struct kref *kref)
 497 {
 498         struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);
 499
 500         kfree(mc->multicast.ib);
 501         kfree(mc);
 502 }
 503
 504 static void cma_release_dev(struct rdma_id_private *id_priv)
 505 {
 506         mutex_lock(&lock);
 507         list_del(&id_priv->list);
 508         cma_deref_dev(id_priv->cma_dev);
 509         id_priv->cma_dev = NULL;
 510         mutex_unlock(&lock);
 511 }
 512
 513 static inline struct sockaddr *cma_src_addr(struct rdma_id_private *id_priv)
 514 {
 515         return (struct sockaddr *) &id_priv->id.route.addr.src_addr;
 516 }
 517
 518 static inline struct sockaddr *cma_dst_addr(struct rdma_id_private *id_priv)
 519 {
 520         return (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
 521 }
 522
 523 static inline unsigned short cma_family(struct rdma_id_private *id_priv)
 524 {
 525         return id_priv->id.route.addr.src_addr.ss_family;
 526 }
 527
 528 static int cma_set_qkey(struct rdma_id_private *id_priv, u32 qkey)
 529 {
 530         struct ib_sa_mcmember_rec rec;
 531         int ret = 0;
 532
 533         if (id_priv->qkey) {
 534                 if (qkey && id_priv->qkey != qkey)
 535                         return -EINVAL;
 536                 return 0;
 537         }
 538
 539         if (qkey) {
 540                 id_priv->qkey = qkey;
 541                 return 0;
 542         }
 543
 544         switch (id_priv->id.ps) {
 545         case RDMA_PS_UDP:
 546         case RDMA_PS_IB:
 547                 id_priv->qkey = RDMA_UDP_QKEY;
 548                 break;
 549         case RDMA_PS_IPOIB:
 550                 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
 551                 ret = ib_sa_get_mcmember_rec(id_priv->id.device,
 552                                              id_priv->id.port_num, &rec.mgid,
 553                                              &rec);
 554                 if (!ret)
 555                         id_priv->qkey = be32_to_cpu(rec.qkey);
 556                 break;
 557         default:
 558                 break;
 559         }
 560         return ret;
 561 }
 562
 563 static void cma_translate_ib(struct sockaddr_ib *sib, struct rdma_dev_addr *dev_addr)
 564 {
 565         dev_addr->dev_type = ARPHRD_INFINIBAND;
 566         rdma_addr_set_sgid(dev_addr, (union ib_gid *) &sib->sib_addr);
 567         ib_addr_set_pkey(dev_addr, ntohs(sib->sib_pkey));
 568 }
 569
 570 static int cma_translate_addr(struct sockaddr *addr, struct rdma_dev_addr *dev_addr)
 571 {
 572         int ret;
 573
 574         if (addr->sa_family != AF_IB) {
 575                 ret = rdma_translate_ip(addr, dev_addr);
 576         } else {
 577                 cma_translate_ib((struct sockaddr_ib *) addr, dev_addr);
 578                 ret = 0;
 579         }
 580
 581         return ret;
 582 }
 583
 584 static inline int cma_validate_port(struct ib_device *device, u8 port,
 585                                     enum ib_gid_type gid_type,
 586                                     union ib_gid *gid,
 587                                     const struct rdma_dev_addr *dev_addr)
 588 {
 589         const int dev_type = dev_addr->dev_type;
 590         struct net_device *ndev;
 591         int ret = -ENODEV;
 592
 593         if ((dev_type == ARPHRD_INFINIBAND) && !rdma_protocol_ib(device, port))
 594                 return ret;
 595
 596         if ((dev_type != ARPHRD_INFINIBAND) && rdma_protocol_ib(device, port))
 597                 return ret;
 598
 599         if (dev_type == ARPHRD_ETHER && rdma_protocol_roce(device, port)) {
 600                 ndev = dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if);
 601         } else {
 602                 ndev = NULL;
 603                 gid_type = IB_GID_TYPE_IB;
 604         }
 605
 606         ret = ib_find_cached_gid_by_port(device, gid, gid_type, port,
 607                                          ndev, NULL);
 608
 609         if (ndev)
 610                 dev_put(ndev);
 611
 612         return ret;
 613 }
 614
 615 static int cma_acquire_dev(struct rdma_id_private *id_priv,
 616                            struct rdma_id_private *listen_id_priv)
 617 {
 618         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
 619         struct cma_device *cma_dev;
 620         union ib_gid gid, iboe_gid, *gidp;
 621         int ret = -ENODEV;
 622         u8 port;
 623
 624         if (dev_addr->dev_type != ARPHRD_INFINIBAND &&
 625             id_priv->id.ps == RDMA_PS_IPOIB)
 626                 return -EINVAL;
 627
 628         mutex_lock(&lock);
 629         rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
 630                     &iboe_gid);
 631
 632         memcpy(&gid, dev_addr->src_dev_addr +
 633                rdma_addr_gid_offset(dev_addr), sizeof gid);
 634
 635         if (listen_id_priv) {
 636                 cma_dev = listen_id_priv->cma_dev;
 637                 port = listen_id_priv->id.port_num;
 638
 639                 if (rdma_is_port_valid(cma_dev->device, port)) {
 640                         gidp = rdma_protocol_roce(cma_dev->device, port) ?
 641                                &iboe_gid : &gid;
 642
 643                         ret = cma_validate_port(cma_dev->device, port,
 644                                 rdma_protocol_ib(cma_dev->device, port) ?
 645                                 IB_GID_TYPE_IB :
 646                                 listen_id_priv->gid_type, gidp, dev_addr);
 647                         if (!ret) {
 648                                 id_priv->id.port_num = port;
 649                                 goto out;
 650                         }
 651                 }
 652         }
 653
 654         list_for_each_entry(cma_dev, &dev_list, list) {
 655                 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
 656                         if (listen_id_priv &&
 657                             listen_id_priv->cma_dev == cma_dev &&
 658                             listen_id_priv->id.port_num == port)
 659                                 continue;
 660
 661                         gidp = rdma_protocol_roce(cma_dev->device, port) ?
 662                                &iboe_gid : &gid;
 663
 664                         ret = cma_validate_port(cma_dev->device, port,
 665                                                 rdma_protocol_ib(cma_dev->device, port) ?
 666                                                 IB_GID_TYPE_IB :
 667                                                 cma_dev->default_gid_type[port - 1],
 668                                                 gidp, dev_addr);
 669                         if (!ret) {
 670                                 id_priv->id.port_num = port;
 671                                 goto out;
 672                         }
 673                 }
 674         }
 675
 676 out:
 677         if (!ret)
 678                 cma_attach_to_dev(id_priv, cma_dev);
 679
 680         mutex_unlock(&lock);
 681         return ret;
 682 }
 683
 684 /*
 685  * Select the source IB device and address to reach the destination IB address.
 686  */
 687 static int cma_resolve_ib_dev(struct rdma_id_private *id_priv)
 688 {
 689         struct cma_device *cma_dev, *cur_dev;
 690         struct sockaddr_ib *addr;
 691         union ib_gid gid, sgid, *dgid;
 692         u16 pkey, index;
 693         u8 p;
 694         int i;
 695
 696         cma_dev = NULL;
 697         addr = (struct sockaddr_ib *) cma_dst_addr(id_priv);
 698         dgid = (union ib_gid *) &addr->sib_addr;
 699         pkey = ntohs(addr->sib_pkey);
 700
 701         list_for_each_entry(cur_dev, &dev_list, list) {
 702                 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
 703                         if (!rdma_cap_af_ib(cur_dev->device, p))
 704                                 continue;
 705
 706                         if (ib_find_cached_pkey(cur_dev->device, p, pkey, &index))
 707                                 continue;
 708
 709                         for (i = 0; !ib_get_cached_gid(cur_dev->device, p, i,
 710                                                        &gid, NULL);
 711                              i++) {
 712                                 if (!memcmp(&gid, dgid, sizeof(gid))) {
 713                                         cma_dev = cur_dev;
 714                                         sgid = gid;
 715                                         id_priv->id.port_num = p;
 716                                         goto found;
 717                                 }
 718
 719                                 if (!cma_dev && (gid.global.subnet_prefix ==
 720                                                  dgid->global.subnet_prefix)) {
 721                                         cma_dev = cur_dev;
 722                                         sgid = gid;
 723                                         id_priv->id.port_num = p;
 724                                 }
 725                         }
 726                 }
 727         }
 728
 729         if (!cma_dev)
 730                 return -ENODEV;
 731
 732 found:
 733         cma_attach_to_dev(id_priv, cma_dev);
 734         addr = (struct sockaddr_ib *) cma_src_addr(id_priv);
 735         memcpy(&addr->sib_addr, &sgid, sizeof sgid);
 736         cma_translate_ib(addr, &id_priv->id.route.addr.dev_addr);
 737         return 0;
 738 }
 739
 740 static void cma_deref_id(struct rdma_id_private *id_priv)
 741 {
 742         if (atomic_dec_and_test(&id_priv->refcount))
 743                 complete(&id_priv->comp);
 744 }
 745
 746 struct rdma_cm_id *rdma_create_id(struct vnet *net,
 747                                   rdma_cm_event_handler event_handler,
 748                                   void *context, enum rdma_port_space ps,
 749                                   enum ib_qp_type qp_type)
 750 {
 751         struct rdma_id_private *id_priv;
 752
 753 #ifdef VIMAGE
 754         if (net == NULL)
 755                 return ERR_PTR(-EINVAL);
 756 #endif
 757         id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
 758         if (!id_priv)
 759                 return ERR_PTR(-ENOMEM);
 760
 761         id_priv->owner = task_pid_nr(current);
 762         id_priv->state = RDMA_CM_IDLE;
 763         id_priv->id.context = context;
 764         id_priv->id.event_handler = event_handler;
 765         id_priv->id.ps = ps;
 766         id_priv->id.qp_type = qp_type;
 767         spin_lock_init(&id_priv->lock);
 768         mutex_init(&id_priv->qp_mutex);
 769         init_completion(&id_priv->comp);
 770         atomic_set(&id_priv->refcount, 1);
 771         mutex_init(&id_priv->handler_mutex);
 772         INIT_LIST_HEAD(&id_priv->listen_list);
 773         INIT_LIST_HEAD(&id_priv->mc_list);
 774         get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
 775         id_priv->id.route.addr.dev_addr.net = net;
 776
 777         return &id_priv->id;
 778 }
 779 EXPORT_SYMBOL(rdma_create_id);
 780
 781 static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
 782 {
 783         struct ib_qp_attr qp_attr;
 784         int qp_attr_mask, ret;
 785
 786         qp_attr.qp_state = IB_QPS_INIT;
 787         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 788         if (ret)
 789                 return ret;
 790
 791         ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
 792         if (ret)
 793                 return ret;
 794
 795         qp_attr.qp_state = IB_QPS_RTR;
 796         ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
 797         if (ret)
 798                 return ret;
 799
 800         qp_attr.qp_state = IB_QPS_RTS;
 801         qp_attr.sq_psn = 0;
 802         ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
 803
 804         return ret;
 805 }
 806
 807 static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
 808 {
 809         struct ib_qp_attr qp_attr;
 810         int qp_attr_mask, ret;
 811
 812         qp_attr.qp_state = IB_QPS_INIT;
 813         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 814         if (ret)
 815                 return ret;
 816
 817         return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
 818 }
 819
 820 int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
 821                    struct ib_qp_init_attr *qp_init_attr)
 822 {
 823         struct rdma_id_private *id_priv;
 824         struct ib_qp *qp;
 825         int ret;
 826
 827         id_priv = container_of(id, struct rdma_id_private, id);
 828         if (id->device != pd->device)
 829                 return -EINVAL;
 830
 831         qp_init_attr->port_num = id->port_num;
 832         qp = ib_create_qp(pd, qp_init_attr);
 833         if (IS_ERR(qp))
 834                 return PTR_ERR(qp);
 835
 836         if (id->qp_type == IB_QPT_UD)
 837                 ret = cma_init_ud_qp(id_priv, qp);
 838         else
 839                 ret = cma_init_conn_qp(id_priv, qp);
 840         if (ret)
 841                 goto err;
 842
 843         id->qp = qp;
 844         id_priv->qp_num = qp->qp_num;
 845         id_priv->srq = (qp->srq != NULL);
 846         return 0;
 847 err:
 848         ib_destroy_qp(qp);
 849         return ret;
 850 }
 851 EXPORT_SYMBOL(rdma_create_qp);
 852
 853 void rdma_destroy_qp(struct rdma_cm_id *id)
 854 {
 855         struct rdma_id_private *id_priv;
 856
 857         id_priv = container_of(id, struct rdma_id_private, id);
 858         mutex_lock(&id_priv->qp_mutex);
 859         ib_destroy_qp(id_priv->id.qp);
 860         id_priv->id.qp = NULL;
 861         mutex_unlock(&id_priv->qp_mutex);
 862 }
 863 EXPORT_SYMBOL(rdma_destroy_qp);
 864
 865 static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
 866                              struct rdma_conn_param *conn_param)
 867 {
 868         struct ib_qp_attr qp_attr;
 869         int qp_attr_mask, ret;
 870         union ib_gid sgid;
 871
 872         mutex_lock(&id_priv->qp_mutex);
 873         if (!id_priv->id.qp) {
 874                 ret = 0;
 875                 goto out;
 876         }
 877
 878         /* Need to update QP attributes from default values. */
 879         qp_attr.qp_state = IB_QPS_INIT;
 880         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 881         if (ret)
 882                 goto out;
 883
 884         ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
 885         if (ret)
 886                 goto out;
 887
 888         qp_attr.qp_state = IB_QPS_RTR;
 889         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 890         if (ret)
 891                 goto out;
 892
 893         ret = ib_query_gid(id_priv->id.device, id_priv->id.port_num,
 894                            qp_attr.ah_attr.grh.sgid_index, &sgid, NULL);
 895         if (ret)
 896                 goto out;
 897
 898         BUG_ON(id_priv->cma_dev->device != id_priv->id.device);
 899
 900         if (conn_param)
 901                 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
 902         ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
 903 out:
 904         mutex_unlock(&id_priv->qp_mutex);
 905         return ret;
 906 }
 907
 908 static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
 909                              struct rdma_conn_param *conn_param)
 910 {
 911         struct ib_qp_attr qp_attr;
 912         int qp_attr_mask, ret;
 913
 914         mutex_lock(&id_priv->qp_mutex);
 915         if (!id_priv->id.qp) {
 916                 ret = 0;
 917                 goto out;
 918         }
 919
 920         qp_attr.qp_state = IB_QPS_RTS;
 921         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 922         if (ret)
 923                 goto out;
 924
 925         if (conn_param)
 926                 qp_attr.max_rd_atomic = conn_param->initiator_depth;
 927         ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
 928 out:
 929         mutex_unlock(&id_priv->qp_mutex);
 930         return ret;
 931 }
 932
 933 static int cma_modify_qp_err(struct rdma_id_private *id_priv)
 934 {
 935         struct ib_qp_attr qp_attr;
 936         int ret;
 937
 938         mutex_lock(&id_priv->qp_mutex);
 939         if (!id_priv->id.qp) {
 940                 ret = 0;
 941                 goto out;
 942         }
 943
 944         qp_attr.qp_state = IB_QPS_ERR;
 945         ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
 946 out:
 947         mutex_unlock(&id_priv->qp_mutex);
 948         return ret;
 949 }
 950
 951 static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
 952                                struct ib_qp_attr *qp_attr, int *qp_attr_mask)
 953 {
 954         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
 955         int ret;
 956         u16 pkey;
 957
 958         if (rdma_cap_eth_ah(id_priv->id.device, id_priv->id.port_num))
 959                 pkey = 0xffff;
 960         else
 961                 pkey = ib_addr_get_pkey(dev_addr);
 962
 963         ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
 964                                   pkey, &qp_attr->pkey_index);
 965         if (ret)
 966                 return ret;
 967
 968         qp_attr->port_num = id_priv->id.port_num;
 969         *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
 970
 971         if (id_priv->id.qp_type == IB_QPT_UD) {
 972                 ret = cma_set_qkey(id_priv, 0);
 973                 if (ret)
 974                         return ret;
 975
 976                 qp_attr->qkey = id_priv->qkey;
 977                 *qp_attr_mask |= IB_QP_QKEY;
 978         } else {
 979                 qp_attr->qp_access_flags = 0;
 980                 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
 981         }
 982         return 0;
 983 }
 984
 985 int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
 986                        int *qp_attr_mask)
 987 {
 988         struct rdma_id_private *id_priv;
 989         int ret = 0;
 990
 991         id_priv = container_of(id, struct rdma_id_private, id);
 992         if (rdma_cap_ib_cm(id->device, id->port_num)) {
 993                 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD))
 994                         ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
 995                 else
 996                         ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
 997                                                  qp_attr_mask);
 998
 999                 if (qp_attr->qp_state == IB_QPS_RTR)
1000                         qp_attr->rq_psn = id_priv->seq_num;
1001         } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
1002                 if (!id_priv->cm_id.iw) {
1003                         qp_attr->qp_access_flags = 0;
1004                         *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
1005                 } else
1006                         ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
1007                                                  qp_attr_mask);
1008                 qp_attr->port_num = id_priv->id.port_num;
1009                 *qp_attr_mask |= IB_QP_PORT;
1010         } else
1011                 ret = -ENOSYS;
1012
1013         return ret;
1014 }
1015 EXPORT_SYMBOL(rdma_init_qp_attr);
1016
1017 static inline int cma_zero_addr(struct sockaddr *addr)
1018 {
1019         switch (addr->sa_family) {
1020         case AF_INET:
1021                 return ipv4_is_zeronet(((struct sockaddr_in *)addr)->sin_addr.s_addr);
1022         case AF_INET6:
1023                 return ipv6_addr_any(&((struct sockaddr_in6 *) addr)->sin6_addr);
1024         case AF_IB:
1025                 return ib_addr_any(&((struct sockaddr_ib *) addr)->sib_addr);
1026         default:
1027                 return 0;
1028         }
1029 }
1030
1031 static inline int cma_loopback_addr(struct sockaddr *addr)
1032 {
1033         switch (addr->sa_family) {
1034         case AF_INET:
1035                 return ipv4_is_loopback(((struct sockaddr_in *) addr)->sin_addr.s_addr);
1036         case AF_INET6:
1037                 return ipv6_addr_loopback(&((struct sockaddr_in6 *) addr)->sin6_addr);
1038         case AF_IB:
1039                 return ib_addr_loopback(&((struct sockaddr_ib *) addr)->sib_addr);
1040         default:
1041                 return 0;
1042         }
1043 }
1044
1045 static inline int cma_any_addr(struct sockaddr *addr)
1046 {
1047         return cma_zero_addr(addr) || cma_loopback_addr(addr);
1048 }
1049
1050 static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst)
1051 {
1052         if (src->sa_family != dst->sa_family)
1053                 return -1;
1054
1055         switch (src->sa_family) {
1056         case AF_INET:
1057                 return ((struct sockaddr_in *) src)->sin_addr.s_addr !=
1058                        ((struct sockaddr_in *) dst)->sin_addr.s_addr;
1059         case AF_INET6:
1060                 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr,
1061                                      &((struct sockaddr_in6 *) dst)->sin6_addr);
1062         default:
1063                 return ib_addr_cmp(&((struct sockaddr_ib *) src)->sib_addr,
1064                                    &((struct sockaddr_ib *) dst)->sib_addr);
1065         }
1066 }
1067
1068 static __be16 cma_port(struct sockaddr *addr)
1069 {
1070         struct sockaddr_ib *sib;
1071
1072         switch (addr->sa_family) {
1073         case AF_INET:
1074                 return ((struct sockaddr_in *) addr)->sin_port;
1075         case AF_INET6:
1076                 return ((struct sockaddr_in6 *) addr)->sin6_port;
1077         case AF_IB:
1078                 sib = (struct sockaddr_ib *) addr;
1079                 return htons((u16) (be64_to_cpu(sib->sib_sid) &
1080                                     be64_to_cpu(sib->sib_sid_mask)));
1081         default:
1082                 return 0;
1083         }
1084 }
1085
1086 static inline int cma_any_port(struct sockaddr *addr)
1087 {
1088         return !cma_port(addr);
1089 }
1090
1091 static void cma_save_ib_info(struct sockaddr *src_addr,
1092                              struct sockaddr *dst_addr,
1093                              struct rdma_cm_id *listen_id,
1094                              struct ib_sa_path_rec *path)
1095 {
1096         struct sockaddr_ib *listen_ib, *ib;
1097
1098         listen_ib = (struct sockaddr_ib *) &listen_id->route.addr.src_addr;
1099         if (src_addr) {
1100                 ib = (struct sockaddr_ib *)src_addr;
1101                 ib->sib_family = AF_IB;
1102                 if (path) {
1103                         ib->sib_pkey = path->pkey;
1104                         ib->sib_flowinfo = path->flow_label;
1105                         memcpy(&ib->sib_addr, &path->sgid, 16);
1106                         ib->sib_sid = path->service_id;
1107                         ib->sib_scope_id = 0;
1108                 } else {
1109                         ib->sib_pkey = listen_ib->sib_pkey;
1110                         ib->sib_flowinfo = listen_ib->sib_flowinfo;
1111                         ib->sib_addr = listen_ib->sib_addr;
1112                         ib->sib_sid = listen_ib->sib_sid;
1113                         ib->sib_scope_id = listen_ib->sib_scope_id;
1114                 }
1115                 ib->sib_sid_mask = cpu_to_be64(0xffffffffffffffffULL);
1116         }
1117         if (dst_addr) {
1118                 ib = (struct sockaddr_ib *)dst_addr;
1119                 ib->sib_family = AF_IB;
1120                 if (path) {
1121                         ib->sib_pkey = path->pkey;
1122                         ib->sib_flowinfo = path->flow_label;
1123                         memcpy(&ib->sib_addr, &path->dgid, 16);
1124                 }
1125         }
1126 }
1127
1128 static void cma_save_ip4_info(struct sockaddr_in *src_addr,
1129                               struct sockaddr_in *dst_addr,
1130                               struct cma_hdr *hdr,
1131                               __be16 local_port)
1132 {
1133         if (src_addr) {
1134                 *src_addr = (struct sockaddr_in) {
1135                         .sin_len = sizeof(struct sockaddr_in),
1136                         .sin_family = AF_INET,
1137                         .sin_addr.s_addr = hdr->dst_addr.ip4.addr,
1138                         .sin_port = local_port,
1139                 };
1140         }
1141
1142         if (dst_addr) {
1143                 *dst_addr = (struct sockaddr_in) {
1144                         .sin_len = sizeof(struct sockaddr_in),
1145                         .sin_family = AF_INET,
1146                         .sin_addr.s_addr = hdr->src_addr.ip4.addr,
1147                         .sin_port = hdr->port,
1148                 };
1149         }
1150 }
1151
1152 static void cma_ip6_clear_scope_id(struct in6_addr *addr)
1153 {
1154         /* make sure link local scope ID gets zeroed */
1155         if (IN6_IS_SCOPE_LINKLOCAL(addr) ||
1156             IN6_IS_ADDR_MC_INTFACELOCAL(addr)) {
1157                 /* use byte-access to be alignment safe */
1158                 addr->s6_addr[2] = 0;
1159                 addr->s6_addr[3] = 0;
1160         }
1161 }
1162
1163 static void cma_save_ip6_info(struct sockaddr_in6 *src_addr,
1164                               struct sockaddr_in6 *dst_addr,
1165                               struct cma_hdr *hdr,
1166                               __be16 local_port)
1167 {
1168         if (src_addr) {
1169                 *src_addr = (struct sockaddr_in6) {
1170                         .sin6_len = sizeof(struct sockaddr_in6),
1171                         .sin6_family = AF_INET6,
1172                         .sin6_addr = hdr->dst_addr.ip6,
1173                         .sin6_port = local_port,
1174                 };
1175                 cma_ip6_clear_scope_id(&src_addr->sin6_addr);
1176         }
1177
1178         if (dst_addr) {
1179                 *dst_addr = (struct sockaddr_in6) {
1180                         .sin6_len = sizeof(struct sockaddr_in6),
1181                         .sin6_family = AF_INET6,
1182                         .sin6_addr = hdr->src_addr.ip6,
1183                         .sin6_port = hdr->port,
1184                 };
1185                 cma_ip6_clear_scope_id(&dst_addr->sin6_addr);
1186         }
1187 }
1188
1189 static u16 cma_port_from_service_id(__be64 service_id)
1190 {
1191         return (u16)be64_to_cpu(service_id);
1192 }
1193
1194 static int sdp_save_ip_info(struct sockaddr *src_addr,
1195                             struct sockaddr *dst_addr,
1196                             const struct sdp_hh *hdr,
1197                             __be64 service_id)
1198 {
1199         __be16 local_port;
1200
1201         BUG_ON(src_addr == NULL || dst_addr == NULL);
1202
1203         if (sdp_get_majv(hdr->majv_minv) != SDP_MAJ_VERSION)
1204                 return -EINVAL;
1205
1206         local_port = htons(cma_port_from_service_id(service_id));
1207
1208         switch (sdp_get_ip_ver(hdr)) {
1209         case 4: {
1210                 struct sockaddr_in *s4, *d4;
1211
1212                 s4 = (void *)src_addr;
1213                 d4 = (void *)dst_addr;
1214
1215                 *s4 = (struct sockaddr_in) {
1216                         .sin_len = sizeof(*s4),
1217                         .sin_family = AF_INET,
1218                         .sin_addr.s_addr = hdr->dst_addr.ip4.addr,
1219                         .sin_port = local_port,
1220                 };
1221                 *d4 = (struct sockaddr_in) {
1222                         .sin_len = sizeof(*d4),
1223                         .sin_family = AF_INET,
1224                         .sin_addr.s_addr = hdr->src_addr.ip4.addr,
1225                         .sin_port = hdr->port,
1226                 };
1227                 break;
1228         }
1229         case 6: {
1230                 struct sockaddr_in6 *s6, *d6;
1231
1232                 s6 = (void *)src_addr;
1233                 d6 = (void *)dst_addr;
1234
1235                 *s6 = (struct sockaddr_in6) {
1236                         .sin6_len = sizeof(*s6),
1237                         .sin6_family = AF_INET6,
1238                         .sin6_addr = hdr->dst_addr.ip6,
1239                         .sin6_port = local_port,
1240                 };
1241                 *d6 = (struct sockaddr_in6) {
1242                         .sin6_len = sizeof(*d6),
1243                         .sin6_family = AF_INET6,
1244                         .sin6_addr = hdr->src_addr.ip6,
1245                         .sin6_port = hdr->port,
1246                 };
1247                 cma_ip6_clear_scope_id(&s6->sin6_addr);
1248                 cma_ip6_clear_scope_id(&d6->sin6_addr);
1249                 break;
1250         }
1251         default:
1252                 return -EAFNOSUPPORT;
1253         }
1254
1255         return 0;
1256 }
1257
1258 static int cma_save_ip_info(struct sockaddr *src_addr,
1259                             struct sockaddr *dst_addr,
1260                             struct ib_cm_event *ib_event,
1261                             __be64 service_id)
1262 {
1263         struct cma_hdr *hdr;
1264         __be16 port;
1265
1266         if (rdma_ps_from_service_id(service_id) == RDMA_PS_SDP)
1267                 return sdp_save_ip_info(src_addr, dst_addr,
1268                     ib_event->private_data, service_id);
1269
1270         hdr = ib_event->private_data;
1271         if (hdr->cma_version != CMA_VERSION)
1272                 return -EINVAL;
1273
1274         port = htons(cma_port_from_service_id(service_id));
1275
1276         switch (cma_get_ip_ver(hdr)) {
1277         case 4:
1278                 cma_save_ip4_info((struct sockaddr_in *)src_addr,
1279                                   (struct sockaddr_in *)dst_addr, hdr, port);
1280                 break;
1281         case 6:
1282                 cma_save_ip6_info((struct sockaddr_in6 *)src_addr,
1283                                   (struct sockaddr_in6 *)dst_addr, hdr, port);
1284                 break;
1285         default:
1286                 return -EAFNOSUPPORT;
1287         }
1288
1289         return 0;
1290 }
1291
1292 static int cma_save_net_info(struct sockaddr *src_addr,
1293                              struct sockaddr *dst_addr,
1294                              struct rdma_cm_id *listen_id,
1295                              struct ib_cm_event *ib_event,
1296                              sa_family_t sa_family, __be64 service_id)
1297 {
1298         if (sa_family == AF_IB) {
1299                 if (ib_event->event == IB_CM_REQ_RECEIVED)
1300                         cma_save_ib_info(src_addr, dst_addr, listen_id,
1301                                          ib_event->param.req_rcvd.primary_path);
1302                 else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED)
1303                         cma_save_ib_info(src_addr, dst_addr, listen_id, NULL);
1304                 return 0;
1305         }
1306
1307         return cma_save_ip_info(src_addr, dst_addr, ib_event, service_id);
1308 }
1309
1310 static int cma_save_req_info(const struct ib_cm_event *ib_event,
1311                              struct cma_req_info *req)
1312 {
1313         const struct ib_cm_req_event_param *req_param =
1314                 &ib_event->param.req_rcvd;
1315         const struct ib_cm_sidr_req_event_param *sidr_param =
1316                 &ib_event->param.sidr_req_rcvd;
1317
1318         switch (ib_event->event) {
1319         case IB_CM_REQ_RECEIVED:
1320                 req->device     = req_param->listen_id->device;
1321                 req->port       = req_param->port;
1322                 memcpy(&req->local_gid, &req_param->primary_path->sgid,
1323                        sizeof(req->local_gid));
1324                 req->has_gid    = true;
1325                 req->service_id = req_param->primary_path->service_id;
1326                 req->pkey       = be16_to_cpu(req_param->primary_path->pkey);
1327                 if (req->pkey != req_param->bth_pkey)
1328                         pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and primary path P_Key (0x%x)\n"
1329                                             "RDMA CMA: in the future this may cause the request to be dropped\n",
1330                                             req_param->bth_pkey, req->pkey);
1331                 break;
1332         case IB_CM_SIDR_REQ_RECEIVED:
1333                 req->device     = sidr_param->listen_id->device;
1334                 req->port       = sidr_param->port;
1335                 req->has_gid    = false;
1336                 req->service_id = sidr_param->service_id;
1337                 req->pkey       = sidr_param->pkey;
1338                 if (req->pkey != sidr_param->bth_pkey)
1339                         pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and SIDR request payload P_Key (0x%x)\n"
1340                                             "RDMA CMA: in the future this may cause the request to be dropped\n",
1341                                             sidr_param->bth_pkey, req->pkey);
1342                 break;
1343         default:
1344                 return -EINVAL;
1345         }
1346
1347         return 0;
1348 }
1349
1350 static bool validate_ipv4_net_dev(struct net_device *net_dev,
1351                                   const struct sockaddr_in *dst_addr,
1352                                   const struct sockaddr_in *src_addr)
1353 {
1354 #ifdef INET
1355         __be32 daddr = dst_addr->sin_addr.s_addr,
1356                saddr = src_addr->sin_addr.s_addr;
1357         struct net_device *dst_dev;
1358         struct nhop_object *nh;
1359         bool ret;
1360
1361         if (ipv4_is_multicast(saddr) || ipv4_is_lbcast(saddr) ||
1362             ipv4_is_lbcast(daddr) || ipv4_is_zeronet(saddr) ||
1363             ipv4_is_zeronet(daddr) || ipv4_is_loopback(daddr) ||
1364             ipv4_is_loopback(saddr))
1365                 return false;
1366
1367         dst_dev = ip_dev_find(net_dev->if_vnet, daddr);
1368         if (dst_dev != net_dev) {
1369                 if (dst_dev != NULL)
1370                         dev_put(dst_dev);
1371                 return false;
1372         }
1373         dev_put(dst_dev);
1374
1375         /*
1376          * Check for loopback.
1377          */
1378         if (saddr == daddr)
1379                 return true;
1380
1381         CURVNET_SET(net_dev->if_vnet);
1382         nh = fib4_lookup(RT_DEFAULT_FIB, src_addr->sin_addr, 0, NHR_NONE, 0);
1383         if (nh != NULL)
1384                 ret = (nh->nh_ifp == net_dev);
1385         else
1386                 ret = false;
1387         CURVNET_RESTORE();
1388         return ret;
1389 #else
1390         return false;
1391 #endif
1392 }
1393
1394 static bool validate_ipv6_net_dev(struct net_device *net_dev,
1395                                   const struct sockaddr_in6 *dst_addr,
1396                                   const struct sockaddr_in6 *src_addr)
1397 {
1398 #ifdef INET6
1399         struct sockaddr_in6 src_tmp = *src_addr;
1400         struct sockaddr_in6 dst_tmp = *dst_addr;
1401         struct net_device *dst_dev;
1402         struct nhop_object *nh;
1403         bool ret;
1404
1405         dst_dev = ip6_dev_find(net_dev->if_vnet, dst_tmp.sin6_addr,
1406             net_dev->if_index);
1407         if (dst_dev != net_dev) {
1408                 if (dst_dev != NULL)
1409                         dev_put(dst_dev);
1410                 return false;
1411         }
1412         dev_put(dst_dev);
1413
1414         CURVNET_SET(net_dev->if_vnet);
1415
1416         /*
1417          * Make sure the scope ID gets embedded.
1418          */
1419         src_tmp.sin6_scope_id = net_dev->if_index;
1420         sa6_embedscope(&src_tmp, 0);
1421
1422         dst_tmp.sin6_scope_id = net_dev->if_index;
1423         sa6_embedscope(&dst_tmp, 0);
1424
1425         /*
1426          * Check for loopback after scope ID
1427          * has been embedded:
1428          */
1429         if (memcmp(&src_tmp.sin6_addr, &dst_tmp.sin6_addr,
1430             sizeof(dst_tmp.sin6_addr)) == 0) {
1431                 ret = true;
1432         } else {
1433                 /* non-loopback case */
1434                 nh = fib6_lookup(RT_DEFAULT_FIB, &src_addr->sin6_addr,
1435                     net_dev->if_index, NHR_NONE, 0);
1436                 if (nh != NULL)
1437                         ret = (nh->nh_ifp == net_dev);
1438                 else
1439                         ret = false;
1440         }
1441         CURVNET_RESTORE();
1442         return ret;
1443 #else
1444         return false;
1445 #endif
1446 }
1447
1448 static bool validate_net_dev(struct net_device *net_dev,
1449                              const struct sockaddr *daddr,
1450                              const struct sockaddr *saddr)
1451 {
1452         const struct sockaddr_in *daddr4 = (const struct sockaddr_in *)daddr;
1453         const struct sockaddr_in *saddr4 = (const struct sockaddr_in *)saddr;
1454         const struct sockaddr_in6 *daddr6 = (const struct sockaddr_in6 *)daddr;
1455         const struct sockaddr_in6 *saddr6 = (const struct sockaddr_in6 *)saddr;
1456
1457         switch (daddr->sa_family) {
1458         case AF_INET:
1459                 return saddr->sa_family == AF_INET &&
1460                        validate_ipv4_net_dev(net_dev, daddr4, saddr4);
1461
1462         case AF_INET6:
1463                 return saddr->sa_family == AF_INET6 &&
1464                        validate_ipv6_net_dev(net_dev, daddr6, saddr6);
1465
1466         default:
1467                 return false;
1468         }
1469 }
1470
1471 static struct net_device *
1472 roce_get_net_dev_by_cm_event(struct ib_device *device, u8 port_num,
1473     const struct ib_cm_event *ib_event)
1474 {
1475         struct ib_gid_attr sgid_attr;
1476         union ib_gid sgid;
1477         int err = -EINVAL;
1478
1479         if (ib_event->event == IB_CM_REQ_RECEIVED) {
1480                 err = ib_get_cached_gid(device, port_num,
1481                     ib_event->param.req_rcvd.ppath_sgid_index, &sgid, &sgid_attr);
1482         } else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) {
1483                 err = ib_get_cached_gid(device, port_num,
1484                     ib_event->param.sidr_req_rcvd.sgid_index, &sgid, &sgid_attr);
1485         }
1486         if (err)
1487                 return (NULL);
1488         return (sgid_attr.ndev);
1489 }
1490
1491 static struct net_device *cma_get_net_dev(struct ib_cm_event *ib_event,
1492                                           const struct cma_req_info *req)
1493 {
1494         struct sockaddr_storage listen_addr_storage, src_addr_storage;
1495         struct sockaddr *listen_addr = (struct sockaddr *)&listen_addr_storage,
1496                         *src_addr = (struct sockaddr *)&src_addr_storage;
1497         struct net_device *net_dev;
1498         const union ib_gid *gid = req->has_gid ? &req->local_gid : NULL;
1499         struct epoch_tracker et;
1500         int err;
1501
1502         err = cma_save_ip_info(listen_addr, src_addr, ib_event,
1503                                req->service_id);
1504         if (err)
1505                 return ERR_PTR(err);
1506
1507         if (rdma_protocol_roce(req->device, req->port)) {
1508                 net_dev = roce_get_net_dev_by_cm_event(req->device, req->port,
1509                                                        ib_event);
1510         } else {
1511                 net_dev = ib_get_net_dev_by_params(req->device, req->port,
1512                                                    req->pkey,
1513                                                    gid, listen_addr);
1514         }
1515         if (!net_dev)
1516                 return ERR_PTR(-ENODEV);
1517
1518         NET_EPOCH_ENTER(et);
1519         if (!validate_net_dev(net_dev, listen_addr, src_addr)) {
1520                 NET_EPOCH_EXIT(et);
1521                 dev_put(net_dev);
1522                 return ERR_PTR(-EHOSTUNREACH);
1523         }
1524         NET_EPOCH_EXIT(et);
1525
1526         return net_dev;
1527 }
1528
1529 static enum rdma_port_space rdma_ps_from_service_id(__be64 service_id)
1530 {
1531         return (be64_to_cpu(service_id) >> 16) & 0xffff;
1532 }
1533
1534 static bool sdp_match_private_data(struct rdma_id_private *id_priv,
1535                                    const struct sdp_hh *hdr,
1536                                    struct sockaddr *addr)
1537 {
1538         __be32 ip4_addr;
1539         struct in6_addr ip6_addr;
1540
1541         switch (addr->sa_family) {
1542         case AF_INET:
1543                 ip4_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
1544                 if (sdp_get_ip_ver(hdr) != 4)
1545                         return false;
1546                 if (!cma_any_addr(addr) &&
1547                     hdr->dst_addr.ip4.addr != ip4_addr)
1548                         return false;
1549                 break;
1550         case AF_INET6:
1551                 ip6_addr = ((struct sockaddr_in6 *)addr)->sin6_addr;
1552                 if (sdp_get_ip_ver(hdr) != 6)
1553                         return false;
1554                 cma_ip6_clear_scope_id(&ip6_addr);
1555                 if (!cma_any_addr(addr) &&
1556                     memcmp(&hdr->dst_addr.ip6, &ip6_addr, sizeof(ip6_addr)))
1557                         return false;
1558                 break;
1559         case AF_IB:
1560                 return true;
1561         default:
1562                 return false;
1563         }
1564
1565         return true;
1566 }
1567
1568 static bool cma_match_private_data(struct rdma_id_private *id_priv,
1569                                    const void *vhdr)
1570 {
1571         const struct cma_hdr *hdr = vhdr;
1572         struct sockaddr *addr = cma_src_addr(id_priv);
1573         __be32 ip4_addr;
1574         struct in6_addr ip6_addr;
1575
1576         if (cma_any_addr(addr) && !id_priv->afonly)
1577                 return true;
1578
1579         if (id_priv->id.ps == RDMA_PS_SDP)
1580                 return sdp_match_private_data(id_priv, vhdr, addr);
1581
1582         switch (addr->sa_family) {
1583         case AF_INET:
1584                 ip4_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
1585                 if (cma_get_ip_ver(hdr) != 4)
1586                         return false;
1587                 if (!cma_any_addr(addr) &&
1588                     hdr->dst_addr.ip4.addr != ip4_addr)
1589                         return false;
1590                 break;
1591         case AF_INET6:
1592                 ip6_addr = ((struct sockaddr_in6 *)addr)->sin6_addr;
1593                 if (cma_get_ip_ver(hdr) != 6)
1594                         return false;
1595                 cma_ip6_clear_scope_id(&ip6_addr);
1596                 if (!cma_any_addr(addr) &&
1597                     memcmp(&hdr->dst_addr.ip6, &ip6_addr, sizeof(ip6_addr)))
1598                         return false;
1599                 break;
1600         case AF_IB:
1601                 return true;
1602         default:
1603                 return false;
1604         }
1605
1606         return true;
1607 }
1608
1609 static bool cma_protocol_roce_dev_port(struct ib_device *device, int port_num)
1610 {
1611         enum rdma_link_layer ll = rdma_port_get_link_layer(device, port_num);
1612         enum rdma_transport_type transport =
1613                 rdma_node_get_transport(device->node_type);
1614
1615         return ll == IB_LINK_LAYER_ETHERNET && transport == RDMA_TRANSPORT_IB;
1616 }
1617
1618 static bool cma_protocol_roce(const struct rdma_cm_id *id)
1619 {
1620         struct ib_device *device = id->device;
1621         const int port_num = id->port_num ?: rdma_start_port(device);
1622
1623         return cma_protocol_roce_dev_port(device, port_num);
1624 }
1625
1626 static bool cma_match_net_dev(const struct rdma_cm_id *id,
1627                               const struct net_device *net_dev,
1628                               u8 port_num)
1629 {
1630         const struct rdma_addr *addr = &id->route.addr;
1631
1632         if (!net_dev) {
1633                 if (id->port_num && id->port_num != port_num)
1634                         return false;
1635
1636                 if (id->ps == RDMA_PS_SDP) {
1637                         if (addr->src_addr.ss_family == AF_INET ||
1638                             addr->src_addr.ss_family == AF_INET6)
1639                                 return true;
1640                         return false;
1641                 }
1642                 /* This request is an AF_IB request or a RoCE request */
1643                 return addr->src_addr.ss_family == AF_IB ||
1644                     cma_protocol_roce_dev_port(id->device, port_num);
1645         }
1646
1647         return !addr->dev_addr.bound_dev_if ||
1648                (net_eq(dev_net(net_dev), addr->dev_addr.net) &&
1649                 addr->dev_addr.bound_dev_if == net_dev->if_index);
1650 }
1651
1652 static struct rdma_id_private *cma_find_listener(
1653                 const struct rdma_bind_list *bind_list,
1654                 const struct ib_cm_id *cm_id,
1655                 const struct ib_cm_event *ib_event,
1656                 const struct cma_req_info *req,
1657                 const struct net_device *net_dev)
1658 {
1659         struct rdma_id_private *id_priv, *id_priv_dev;
1660
1661         if (!bind_list)
1662                 return ERR_PTR(-EINVAL);
1663
1664         hlist_for_each_entry(id_priv, &bind_list->owners, node) {
1665                 if (cma_match_private_data(id_priv, ib_event->private_data)) {
1666                         if (id_priv->id.device == cm_id->device &&
1667                             cma_match_net_dev(&id_priv->id, net_dev, req->port))
1668                                 return id_priv;
1669                         list_for_each_entry(id_priv_dev,
1670                                             &id_priv->listen_list,
1671                                             listen_list) {
1672                                 if (id_priv_dev->id.device == cm_id->device &&
1673                                     cma_match_net_dev(&id_priv_dev->id, net_dev, req->port))
1674                                         return id_priv_dev;
1675                         }
1676                 }
1677         }
1678
1679         return ERR_PTR(-EINVAL);
1680 }
1681
1682 static struct rdma_id_private *cma_id_from_event(struct ib_cm_id *cm_id,
1683                                                  struct ib_cm_event *ib_event,
1684                                                  struct net_device **net_dev)
1685 {
1686         struct cma_req_info req;
1687         struct rdma_bind_list *bind_list;
1688         struct rdma_id_private *id_priv;
1689         int err;
1690
1691         err = cma_save_req_info(ib_event, &req);
1692         if (err)
1693                 return ERR_PTR(err);
1694
1695         if (rdma_ps_from_service_id(cm_id->service_id) == RDMA_PS_SDP) {
1696                 *net_dev = NULL;
1697                 goto there_is_no_net_dev;
1698         }
1699
1700         *net_dev = cma_get_net_dev(ib_event, &req);
1701         if (IS_ERR(*net_dev)) {
1702                 if (PTR_ERR(*net_dev) == -EAFNOSUPPORT) {
1703                         /* Assuming the protocol is AF_IB */
1704                         *net_dev = NULL;
1705                 } else {
1706                         return ERR_CAST(*net_dev);
1707                 }
1708         }
1709
1710 there_is_no_net_dev:
1711         bind_list = cma_ps_find(*net_dev ? dev_net(*net_dev) : &init_net,
1712                                 rdma_ps_from_service_id(req.service_id),
1713                                 cma_port_from_service_id(req.service_id));
1714         id_priv = cma_find_listener(bind_list, cm_id, ib_event, &req, *net_dev);
1715         if (IS_ERR(id_priv) && *net_dev) {
1716                 dev_put(*net_dev);
1717                 *net_dev = NULL;
1718         }
1719
1720         return id_priv;
1721 }
1722
1723 static inline int cma_user_data_offset(struct rdma_id_private *id_priv)
1724 {
1725         if (cma_family(id_priv) == AF_IB)
1726                 return 0;
1727         if (id_priv->id.ps == RDMA_PS_SDP)
1728                 return 0;
1729         return sizeof(struct cma_hdr);
1730 }
1731
1732 static void cma_cancel_route(struct rdma_id_private *id_priv)
1733 {
1734         if (rdma_cap_ib_sa(id_priv->id.device, id_priv->id.port_num)) {
1735                 if (id_priv->query)
1736                         ib_sa_cancel_query(id_priv->query_id, id_priv->query);
1737         }
1738 }
1739
1740 static void cma_cancel_listens(struct rdma_id_private *id_priv)
1741 {
1742         struct rdma_id_private *dev_id_priv;
1743
1744         /*
1745          * Remove from listen_any_list to prevent added devices from spawning
1746          * additional listen requests.
1747          */
1748         mutex_lock(&lock);
1749         list_del(&id_priv->list);
1750
1751         while (!list_empty(&id_priv->listen_list)) {
1752                 dev_id_priv = list_entry(id_priv->listen_list.next,
1753                                          struct rdma_id_private, listen_list);
1754                 /* sync with device removal to avoid duplicate destruction */
1755                 list_del_init(&dev_id_priv->list);
1756                 list_del(&dev_id_priv->listen_list);
1757                 mutex_unlock(&lock);
1758
1759                 rdma_destroy_id(&dev_id_priv->id);
1760                 mutex_lock(&lock);
1761         }
1762         mutex_unlock(&lock);
1763 }
1764
1765 static void cma_cancel_operation(struct rdma_id_private *id_priv,
1766                                  enum rdma_cm_state state)
1767 {
1768         switch (state) {
1769         case RDMA_CM_ADDR_QUERY:
1770                 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
1771                 break;
1772         case RDMA_CM_ROUTE_QUERY:
1773                 cma_cancel_route(id_priv);
1774                 break;
1775         case RDMA_CM_LISTEN:
1776                 if (cma_any_addr(cma_src_addr(id_priv)) && !id_priv->cma_dev)
1777                         cma_cancel_listens(id_priv);
1778                 break;
1779         default:
1780                 break;
1781         }
1782 }
1783
1784 static void cma_release_port(struct rdma_id_private *id_priv)
1785 {
1786         struct rdma_bind_list *bind_list = id_priv->bind_list;
1787         struct vnet *net = id_priv->id.route.addr.dev_addr.net;
1788
1789         if (!bind_list)
1790                 return;
1791
1792         mutex_lock(&lock);
1793         hlist_del(&id_priv->node);
1794         if (hlist_empty(&bind_list->owners)) {
1795                 cma_ps_remove(net, bind_list->ps, bind_list->port);
1796                 kfree(bind_list);
1797         }
1798         mutex_unlock(&lock);
1799 }
1800
1801 static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
1802 {
1803         struct cma_multicast *mc;
1804
1805         while (!list_empty(&id_priv->mc_list)) {
1806                 mc = container_of(id_priv->mc_list.next,
1807                                   struct cma_multicast, list);
1808                 list_del(&mc->list);
1809                 if (rdma_cap_ib_mcast(id_priv->cma_dev->device,
1810                                       id_priv->id.port_num)) {
1811                         ib_sa_free_multicast(mc->multicast.ib);
1812                         kfree(mc);
1813                 } else {
1814                         if (mc->igmp_joined) {
1815                                 struct rdma_dev_addr *dev_addr =
1816                                         &id_priv->id.route.addr.dev_addr;
1817                                 struct net_device *ndev = NULL;
1818
1819                                 if (dev_addr->bound_dev_if)
1820                                         ndev = dev_get_by_index(dev_addr->net,
1821                                                                 dev_addr->bound_dev_if);
1822                                 if (ndev) {
1823                                         cma_igmp_send(ndev,
1824                                                       &mc->multicast.ib->rec.mgid,
1825                                                       false);
1826                                         dev_put(ndev);
1827                                 }
1828                         }
1829                         kref_put(&mc->mcref, release_mc);
1830                 }
1831         }
1832 }
1833
1834 void rdma_destroy_id(struct rdma_cm_id *id)
1835 {
1836         struct rdma_id_private *id_priv;
1837         enum rdma_cm_state state;
1838
1839         id_priv = container_of(id, struct rdma_id_private, id);
1840         state = cma_exch(id_priv, RDMA_CM_DESTROYING);
1841         cma_cancel_operation(id_priv, state);
1842
1843         /*
1844          * Wait for any active callback to finish.  New callbacks will find
1845          * the id_priv state set to destroying and abort.
1846          */
1847         mutex_lock(&id_priv->handler_mutex);
1848         mutex_unlock(&id_priv->handler_mutex);
1849
1850         if (id_priv->cma_dev) {
1851                 if (rdma_cap_ib_cm(id_priv->id.device, 1)) {
1852                         if (id_priv->cm_id.ib)
1853                                 ib_destroy_cm_id(id_priv->cm_id.ib);
1854                 } else if (rdma_cap_iw_cm(id_priv->id.device, 1)) {
1855                         if (id_priv->cm_id.iw)
1856                                 iw_destroy_cm_id(id_priv->cm_id.iw);
1857                 }
1858                 cma_leave_mc_groups(id_priv);
1859                 cma_release_dev(id_priv);
1860         }
1861
1862         cma_release_port(id_priv);
1863         cma_deref_id(id_priv);
1864         wait_for_completion(&id_priv->comp);
1865
1866         if (id_priv->internal_id)
1867                 cma_deref_id(id_priv->id.context);
1868
1869         kfree(id_priv->id.route.path_rec);
1870         kfree(id_priv);
1871 }
1872 EXPORT_SYMBOL(rdma_destroy_id);
1873
1874 static int cma_rep_recv(struct rdma_id_private *id_priv)
1875 {
1876         int ret;
1877
1878         ret = cma_modify_qp_rtr(id_priv, NULL);
1879         if (ret)
1880                 goto reject;
1881
1882         ret = cma_modify_qp_rts(id_priv, NULL);
1883         if (ret)
1884                 goto reject;
1885
1886         ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
1887         if (ret)
1888                 goto reject;
1889
1890         return 0;
1891 reject:
1892         cma_modify_qp_err(id_priv);
1893         ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
1894                        NULL, 0, NULL, 0);
1895         return ret;
1896 }
1897
1898 static int sdp_verify_rep(const struct sdp_hah *data)
1899 {
1900         if (sdp_get_majv(data->majv_minv) != SDP_MAJ_VERSION)
1901                 return -EINVAL;
1902         return 0;
1903 }
1904
1905 static void cma_set_rep_event_data(struct rdma_cm_event *event,
1906                                    struct ib_cm_rep_event_param *rep_data,
1907                                    void *private_data)
1908 {
1909         event->param.conn.private_data = private_data;
1910         event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
1911         event->param.conn.responder_resources = rep_data->responder_resources;
1912         event->param.conn.initiator_depth = rep_data->initiator_depth;
1913         event->param.conn.flow_control = rep_data->flow_control;
1914         event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
1915         event->param.conn.srq = rep_data->srq;
1916         event->param.conn.qp_num = rep_data->remote_qpn;
1917 }
1918
1919 static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1920 {
1921         struct rdma_id_private *id_priv = cm_id->context;
1922         struct rdma_cm_event event;
1923         int ret = 0;
1924
1925         mutex_lock(&id_priv->handler_mutex);
1926         if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
1927              id_priv->state != RDMA_CM_CONNECT) ||
1928             (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
1929              id_priv->state != RDMA_CM_DISCONNECT))
1930                 goto out;
1931
1932         memset(&event, 0, sizeof event);
1933         switch (ib_event->event) {
1934         case IB_CM_REQ_ERROR:
1935         case IB_CM_REP_ERROR:
1936                 event.event = RDMA_CM_EVENT_UNREACHABLE;
1937                 event.status = -ETIMEDOUT;
1938                 break;
1939         case IB_CM_REP_RECEIVED:
1940                 if (id_priv->id.ps == RDMA_PS_SDP) {
1941                         event.status = sdp_verify_rep(ib_event->private_data);
1942                         if (event.status)
1943                                 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
1944                         else
1945                                 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
1946                 } else {
1947                         if (id_priv->id.qp) {
1948                                 event.status = cma_rep_recv(id_priv);
1949                                 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
1950                                                             RDMA_CM_EVENT_ESTABLISHED;
1951                         } else {
1952                                 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
1953                         }
1954                 }
1955                 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
1956                                        ib_event->private_data);
1957                 break;
1958         case IB_CM_RTU_RECEIVED:
1959         case IB_CM_USER_ESTABLISHED:
1960                 event.event = RDMA_CM_EVENT_ESTABLISHED;
1961                 break;
1962         case IB_CM_DREQ_ERROR:
1963                 event.status = -ETIMEDOUT; /* fall through */
1964         case IB_CM_DREQ_RECEIVED:
1965         case IB_CM_DREP_RECEIVED:
1966                 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT,
1967                                    RDMA_CM_DISCONNECT))
1968                         goto out;
1969                 event.event = RDMA_CM_EVENT_DISCONNECTED;
1970                 break;
1971         case IB_CM_TIMEWAIT_EXIT:
1972                 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
1973                 break;
1974         case IB_CM_MRA_RECEIVED:
1975                 /* ignore event */
1976                 goto out;
1977         case IB_CM_REJ_RECEIVED:
1978                 cma_modify_qp_err(id_priv);
1979                 event.status = ib_event->param.rej_rcvd.reason;
1980                 event.event = RDMA_CM_EVENT_REJECTED;
1981                 event.param.conn.private_data = ib_event->private_data;
1982                 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
1983                 break;
1984         default:
1985                 pr_err("RDMA CMA: unexpected IB CM event: %d\n",
1986                        ib_event->event);
1987                 goto out;
1988         }
1989
1990         ret = id_priv->id.event_handler(&id_priv->id, &event);
1991         if (ret) {
1992                 /* Destroy the CM ID by returning a non-zero value. */
1993                 id_priv->cm_id.ib = NULL;
1994                 cma_exch(id_priv, RDMA_CM_DESTROYING);
1995                 mutex_unlock(&id_priv->handler_mutex);
1996                 rdma_destroy_id(&id_priv->id);
1997                 return ret;
1998         }
1999 out:
2000         mutex_unlock(&id_priv->handler_mutex);
2001         return ret;
2002 }
2003
2004 static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
2005                                                struct ib_cm_event *ib_event,
2006                                                struct net_device *net_dev)
2007 {
2008         struct rdma_id_private *id_priv;
2009         struct rdma_cm_id *id;
2010         struct rdma_route *rt;
2011         const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
2012         const __be64 service_id =
2013                       ib_event->param.req_rcvd.primary_path->service_id;
2014         int ret;
2015
2016         id = rdma_create_id(listen_id->route.addr.dev_addr.net,
2017                             listen_id->event_handler, listen_id->context,
2018                             listen_id->ps, ib_event->param.req_rcvd.qp_type);
2019         if (IS_ERR(id))
2020                 return NULL;
2021
2022         id_priv = container_of(id, struct rdma_id_private, id);
2023         if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
2024                               (struct sockaddr *)&id->route.addr.dst_addr,
2025                               listen_id, ib_event, ss_family, service_id))
2026                 goto err;
2027
2028         rt = &id->route;
2029         rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
2030         rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
2031                                GFP_KERNEL);
2032         if (!rt->path_rec)
2033                 goto err;
2034
2035         rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
2036         if (rt->num_paths == 2)
2037                 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
2038
2039         if (net_dev) {
2040                 ret = rdma_copy_addr(&rt->addr.dev_addr, net_dev, NULL);
2041                 if (ret)
2042                         goto err;
2043         } else {
2044                 if (!cma_protocol_roce(listen_id) &&
2045                     cma_any_addr(cma_src_addr(id_priv))) {
2046                         rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
2047                         rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
2048                         ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
2049                 } else if (!cma_any_addr(cma_src_addr(id_priv))) {
2050                         ret = cma_translate_addr(cma_src_addr(id_priv), &rt->addr.dev_addr);
2051                         if (ret)
2052                                 goto err;
2053                 }
2054         }
2055         rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
2056
2057         id_priv->state = RDMA_CM_CONNECT;
2058         return id_priv;
2059
2060 err:
2061         rdma_destroy_id(id);
2062         return NULL;
2063 }
2064
2065 static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
2066                                               struct ib_cm_event *ib_event,
2067                                               struct net_device *net_dev)
2068 {
2069         struct rdma_id_private *id_priv;
2070         struct rdma_cm_id *id;
2071         const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
2072         struct vnet *net = listen_id->route.addr.dev_addr.net;
2073         int ret;
2074
2075         id = rdma_create_id(net, listen_id->event_handler, listen_id->context,
2076                             listen_id->ps, IB_QPT_UD);
2077         if (IS_ERR(id))
2078                 return NULL;
2079
2080         id_priv = container_of(id, struct rdma_id_private, id);
2081         if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
2082                               (struct sockaddr *)&id->route.addr.dst_addr,
2083                               listen_id, ib_event, ss_family,
2084                               ib_event->param.sidr_req_rcvd.service_id))
2085                 goto err;
2086
2087         if (net_dev) {
2088                 ret = rdma_copy_addr(&id->route.addr.dev_addr, net_dev, NULL);
2089                 if (ret)
2090                         goto err;
2091         } else {
2092                 if (!cma_any_addr(cma_src_addr(id_priv))) {
2093                         ret = cma_translate_addr(cma_src_addr(id_priv),
2094                                                  &id->route.addr.dev_addr);
2095                         if (ret)
2096                                 goto err;
2097                 }
2098         }
2099
2100         id_priv->state = RDMA_CM_CONNECT;
2101         return id_priv;
2102 err:
2103         rdma_destroy_id(id);
2104         return NULL;
2105 }
2106
2107 static void cma_set_req_event_data(struct rdma_cm_event *event,
2108                                    struct ib_cm_req_event_param *req_data,
2109                                    void *private_data, int offset)
2110 {
2111         event->param.conn.private_data = (char *)private_data + offset;
2112         event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
2113         event->param.conn.responder_resources = req_data->responder_resources;
2114         event->param.conn.initiator_depth = req_data->initiator_depth;
2115         event->param.conn.flow_control = req_data->flow_control;
2116         event->param.conn.retry_count = req_data->retry_count;
2117         event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
2118         event->param.conn.srq = req_data->srq;
2119         event->param.conn.qp_num = req_data->remote_qpn;
2120 }
2121
2122 static int cma_check_req_qp_type(struct rdma_cm_id *id, struct ib_cm_event *ib_event)
2123 {
2124         return (((ib_event->event == IB_CM_REQ_RECEIVED) &&
2125                  (ib_event->param.req_rcvd.qp_type == id->qp_type)) ||
2126                 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) &&
2127                  (id->qp_type == IB_QPT_UD)) ||
2128                 (!id->qp_type));
2129 }
2130
2131 static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
2132 {
2133         struct rdma_id_private *listen_id, *conn_id = NULL;
2134         struct rdma_cm_event event;
2135         struct net_device *net_dev;
2136         int offset, ret;
2137
2138         listen_id = cma_id_from_event(cm_id, ib_event, &net_dev);
2139         if (IS_ERR(listen_id))
2140                 return PTR_ERR(listen_id);
2141
2142         if (!cma_check_req_qp_type(&listen_id->id, ib_event)) {
2143                 ret = -EINVAL;
2144                 goto net_dev_put;
2145         }
2146
2147         mutex_lock(&listen_id->handler_mutex);
2148         if (listen_id->state != RDMA_CM_LISTEN) {
2149                 ret = -ECONNABORTED;
2150                 goto err1;
2151         }
2152
2153         memset(&event, 0, sizeof event);
2154         offset = cma_user_data_offset(listen_id);
2155         event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
2156         if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) {
2157                 conn_id = cma_new_udp_id(&listen_id->id, ib_event, net_dev);
2158                 event.param.ud.private_data = (char *)ib_event->private_data + offset;
2159                 event.param.ud.private_data_len =
2160                                 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
2161         } else {
2162                 conn_id = cma_new_conn_id(&listen_id->id, ib_event, net_dev);
2163                 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
2164                                        ib_event->private_data, offset);
2165         }
2166         if (!conn_id) {
2167                 ret = -ENOMEM;
2168                 goto err1;
2169         }
2170
2171         mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
2172         ret = cma_acquire_dev(conn_id, listen_id);
2173         if (ret)
2174                 goto err2;
2175
2176         conn_id->cm_id.ib = cm_id;
2177         cm_id->context = conn_id;
2178         cm_id->cm_handler = cma_ib_handler;
2179
2180         /*
2181          * Protect against the user destroying conn_id from another thread
2182          * until we're done accessing it.
2183          */
2184         atomic_inc(&conn_id->refcount);
2185         ret = conn_id->id.event_handler(&conn_id->id, &event);
2186         if (ret)
2187                 goto err3;
2188         /*
2189          * Acquire mutex to prevent user executing rdma_destroy_id()
2190          * while we're accessing the cm_id.
2191          */
2192         mutex_lock(&lock);
2193         if (cma_comp(conn_id, RDMA_CM_CONNECT) &&
2194             (conn_id->id.qp_type != IB_QPT_UD))
2195                 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
2196         mutex_unlock(&lock);
2197         mutex_unlock(&conn_id->handler_mutex);
2198         mutex_unlock(&listen_id->handler_mutex);
2199         cma_deref_id(conn_id);
2200         if (net_dev)
2201                 dev_put(net_dev);
2202         return 0;
2203
2204 err3:
2205         cma_deref_id(conn_id);
2206         /* Destroy the CM ID by returning a non-zero value. */
2207         conn_id->cm_id.ib = NULL;
2208 err2:
2209         cma_exch(conn_id, RDMA_CM_DESTROYING);
2210         mutex_unlock(&conn_id->handler_mutex);
2211 err1:
2212         mutex_unlock(&listen_id->handler_mutex);
2213         if (conn_id)
2214                 rdma_destroy_id(&conn_id->id);
2215
2216 net_dev_put:
2217         if (net_dev)
2218                 dev_put(net_dev);
2219
2220         return ret;
2221 }
2222
2223 __be64 rdma_get_service_id(struct rdma_cm_id *id, struct sockaddr *addr)
2224 {
2225         if (addr->sa_family == AF_IB)
2226                 return ((struct sockaddr_ib *) addr)->sib_sid;
2227
2228         return cpu_to_be64(((u64)id->ps << 16) + be16_to_cpu(cma_port(addr)));
2229 }
2230 EXPORT_SYMBOL(rdma_get_service_id);
2231
2232 static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
2233 {
2234         struct rdma_id_private *id_priv = iw_id->context;
2235         struct rdma_cm_event event;
2236         int ret = 0;
2237         struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
2238         struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
2239
2240         mutex_lock(&id_priv->handler_mutex);
2241         if (id_priv->state != RDMA_CM_CONNECT)
2242                 goto out;
2243
2244         memset(&event, 0, sizeof event);
2245         switch (iw_event->event) {
2246         case IW_CM_EVENT_CLOSE:
2247                 event.event = RDMA_CM_EVENT_DISCONNECTED;
2248                 break;
2249         case IW_CM_EVENT_CONNECT_REPLY:
2250                 memcpy(cma_src_addr(id_priv), laddr,
2251                        rdma_addr_size(laddr));
2252                 memcpy(cma_dst_addr(id_priv), raddr,
2253                        rdma_addr_size(raddr));
2254                 switch (iw_event->status) {
2255                 case 0:
2256                         event.event = RDMA_CM_EVENT_ESTABLISHED;
2257                         event.param.conn.initiator_depth = iw_event->ird;
2258                         event.param.conn.responder_resources = iw_event->ord;
2259                         break;
2260                 case -ECONNRESET:
2261                 case -ECONNREFUSED:
2262                         event.event = RDMA_CM_EVENT_REJECTED;
2263                         break;
2264                 case -ETIMEDOUT:
2265                         event.event = RDMA_CM_EVENT_UNREACHABLE;
2266                         break;
2267                 default:
2268                         event.event = RDMA_CM_EVENT_CONNECT_ERROR;
2269                         break;
2270                 }
2271                 break;
2272         case IW_CM_EVENT_ESTABLISHED:
2273                 event.event = RDMA_CM_EVENT_ESTABLISHED;
2274                 event.param.conn.initiator_depth = iw_event->ird;
2275                 event.param.conn.responder_resources = iw_event->ord;
2276                 break;
2277         default:
2278                 BUG_ON(1);
2279         }
2280
2281         event.status = iw_event->status;
2282         event.param.conn.private_data = iw_event->private_data;
2283         event.param.conn.private_data_len = iw_event->private_data_len;
2284         ret = id_priv->id.event_handler(&id_priv->id, &event);
2285         if (ret) {
2286                 /* Destroy the CM ID by returning a non-zero value. */
2287                 id_priv->cm_id.iw = NULL;
2288                 cma_exch(id_priv, RDMA_CM_DESTROYING);
2289                 mutex_unlock(&id_priv->handler_mutex);
2290                 rdma_destroy_id(&id_priv->id);
2291                 return ret;
2292         }
2293
2294 out:
2295         mutex_unlock(&id_priv->handler_mutex);
2296         return ret;
2297 }
2298
2299 static int iw_conn_req_handler(struct iw_cm_id *cm_id,
2300                                struct iw_cm_event *iw_event)
2301 {
2302         struct rdma_cm_id *new_cm_id;
2303         struct rdma_id_private *listen_id, *conn_id;
2304         struct rdma_cm_event event;
2305         int ret = -ECONNABORTED;
2306         struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
2307         struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
2308
2309         listen_id = cm_id->context;
2310
2311         mutex_lock(&listen_id->handler_mutex);
2312         if (listen_id->state != RDMA_CM_LISTEN)
2313                 goto out;
2314
2315         /* Create a new RDMA id for the new IW CM ID */
2316         new_cm_id = rdma_create_id(listen_id->id.route.addr.dev_addr.net,
2317                                    listen_id->id.event_handler,
2318                                    listen_id->id.context,
2319                                    RDMA_PS_TCP, IB_QPT_RC);
2320         if (IS_ERR(new_cm_id)) {
2321                 ret = -ENOMEM;
2322                 goto out;
2323         }
2324         conn_id = container_of(new_cm_id, struct rdma_id_private, id);
2325         mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
2326         conn_id->state = RDMA_CM_CONNECT;
2327
2328         ret = rdma_translate_ip(laddr, &conn_id->id.route.addr.dev_addr);
2329         if (ret) {
2330                 mutex_unlock(&conn_id->handler_mutex);
2331                 rdma_destroy_id(new_cm_id);
2332                 goto out;
2333         }
2334
2335         ret = cma_acquire_dev(conn_id, listen_id);
2336         if (ret) {
2337                 mutex_unlock(&conn_id->handler_mutex);
2338                 rdma_destroy_id(new_cm_id);
2339                 goto out;
2340         }
2341
2342         conn_id->cm_id.iw = cm_id;
2343         cm_id->context = conn_id;
2344         cm_id->cm_handler = cma_iw_handler;
2345
2346         memcpy(cma_src_addr(conn_id), laddr, rdma_addr_size(laddr));
2347         memcpy(cma_dst_addr(conn_id), raddr, rdma_addr_size(raddr));
2348
2349         memset(&event, 0, sizeof event);
2350         event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
2351         event.param.conn.private_data = iw_event->private_data;
2352         event.param.conn.private_data_len = iw_event->private_data_len;
2353         event.param.conn.initiator_depth = iw_event->ird;
2354         event.param.conn.responder_resources = iw_event->ord;
2355
2356         /*
2357          * Protect against the user destroying conn_id from another thread
2358          * until we're done accessing it.
2359          */
2360         atomic_inc(&conn_id->refcount);
2361         ret = conn_id->id.event_handler(&conn_id->id, &event);
2362         if (ret) {
2363                 /* User wants to destroy the CM ID */
2364                 conn_id->cm_id.iw = NULL;
2365                 cma_exch(conn_id, RDMA_CM_DESTROYING);
2366                 mutex_unlock(&conn_id->handler_mutex);
2367                 cma_deref_id(conn_id);
2368                 rdma_destroy_id(&conn_id->id);
2369                 goto out;
2370         }
2371
2372         mutex_unlock(&conn_id->handler_mutex);
2373         cma_deref_id(conn_id);
2374
2375 out:
2376         mutex_unlock(&listen_id->handler_mutex);
2377         return ret;
2378 }
2379
2380 static int cma_ib_listen(struct rdma_id_private *id_priv)
2381 {
2382         struct sockaddr *addr;
2383         struct ib_cm_id *id;
2384         __be64 svc_id;
2385
2386         addr = cma_src_addr(id_priv);
2387         svc_id = rdma_get_service_id(&id_priv->id, addr);
2388         id = ib_cm_insert_listen(id_priv->id.device, cma_req_handler, svc_id);
2389         if (IS_ERR(id))
2390                 return PTR_ERR(id);
2391         id_priv->cm_id.ib = id;
2392
2393         return 0;
2394 }
2395
2396 static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
2397 {
2398         int ret;
2399         struct iw_cm_id *id;
2400
2401         id = iw_create_cm_id(id_priv->id.device,
2402                              iw_conn_req_handler,
2403                              id_priv);
2404         if (IS_ERR(id))
2405                 return PTR_ERR(id);
2406
2407         id->tos = id_priv->tos;
2408         id_priv->cm_id.iw = id;
2409
2410         memcpy(&id_priv->cm_id.iw->local_addr, cma_src_addr(id_priv),
2411                rdma_addr_size(cma_src_addr(id_priv)));
2412
2413         ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
2414
2415         if (ret) {
2416                 iw_destroy_cm_id(id_priv->cm_id.iw);
2417                 id_priv->cm_id.iw = NULL;
2418         }
2419
2420         return ret;
2421 }
2422
2423 static int cma_listen_handler(struct rdma_cm_id *id,
2424                               struct rdma_cm_event *event)
2425 {
2426         struct rdma_id_private *id_priv = id->context;
2427
2428         id->context = id_priv->id.context;
2429         id->event_handler = id_priv->id.event_handler;
2430         return id_priv->id.event_handler(id, event);
2431 }
2432
2433 static void cma_listen_on_dev(struct rdma_id_private *id_priv,
2434                               struct cma_device *cma_dev)
2435 {
2436         struct rdma_id_private *dev_id_priv;
2437         struct rdma_cm_id *id;
2438         struct vnet *net = id_priv->id.route.addr.dev_addr.net;
2439         int ret;
2440
2441         if (cma_family(id_priv) == AF_IB && !rdma_cap_ib_cm(cma_dev->device, 1))
2442                 return;
2443
2444         id = rdma_create_id(net, cma_listen_handler, id_priv, id_priv->id.ps,
2445                             id_priv->id.qp_type);
2446         if (IS_ERR(id))
2447                 return;
2448
2449         dev_id_priv = container_of(id, struct rdma_id_private, id);
2450
2451         dev_id_priv->state = RDMA_CM_ADDR_BOUND;
2452         memcpy(cma_src_addr(dev_id_priv), cma_src_addr(id_priv),
2453                rdma_addr_size(cma_src_addr(id_priv)));
2454
2455         _cma_attach_to_dev(dev_id_priv, cma_dev);
2456         list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
2457         atomic_inc(&id_priv->refcount);
2458         dev_id_priv->internal_id = 1;
2459         dev_id_priv->afonly = id_priv->afonly;
2460
2461         ret = rdma_listen(id, id_priv->backlog);
2462         if (ret)
2463                 pr_warn("RDMA CMA: cma_listen_on_dev, error %d, listening on device %s\n",
2464                         ret, cma_dev->device->name);
2465 }
2466
2467 static void cma_listen_on_all(struct rdma_id_private *id_priv)
2468 {
2469         struct cma_device *cma_dev;
2470
2471         mutex_lock(&lock);
2472         list_add_tail(&id_priv->list, &listen_any_list);
2473         list_for_each_entry(cma_dev, &dev_list, list)
2474                 cma_listen_on_dev(id_priv, cma_dev);
2475         mutex_unlock(&lock);
2476 }
2477
2478 void rdma_set_service_type(struct rdma_cm_id *id, int tos)
2479 {
2480         struct rdma_id_private *id_priv;
2481
2482         id_priv = container_of(id, struct rdma_id_private, id);
2483         id_priv->tos = (u8) tos;
2484 }
2485 EXPORT_SYMBOL(rdma_set_service_type);
2486
2487 static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
2488                               void *context)
2489 {
2490         struct cma_work *work = context;
2491         struct rdma_route *route;
2492
2493         route = &work->id->id.route;
2494
2495         if (!status) {
2496                 route->num_paths = 1;
2497                 *route->path_rec = *path_rec;
2498         } else {
2499                 work->old_state = RDMA_CM_ROUTE_QUERY;
2500                 work->new_state = RDMA_CM_ADDR_RESOLVED;
2501                 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
2502                 work->event.status = status;
2503         }
2504
2505         queue_work(cma_wq, &work->work);
2506 }
2507
2508 static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
2509                               struct cma_work *work)
2510 {
2511         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2512         struct ib_sa_path_rec path_rec;
2513         ib_sa_comp_mask comp_mask;
2514         struct sockaddr_in6 *sin6;
2515         struct sockaddr_ib *sib;
2516
2517         memset(&path_rec, 0, sizeof path_rec);
2518         rdma_addr_get_sgid(dev_addr, &path_rec.sgid);
2519         rdma_addr_get_dgid(dev_addr, &path_rec.dgid);
2520         path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
2521         path_rec.numb_path = 1;
2522         path_rec.reversible = 1;
2523         path_rec.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
2524
2525         comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
2526                     IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
2527                     IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
2528
2529         switch (cma_family(id_priv)) {
2530         case AF_INET:
2531                 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
2532                 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
2533                 break;
2534         case AF_INET6:
2535                 sin6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
2536                 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
2537                 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
2538                 break;
2539         case AF_IB:
2540                 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
2541                 path_rec.traffic_class = (u8) (be32_to_cpu(sib->sib_flowinfo) >> 20);
2542                 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
2543                 break;
2544         }
2545
2546         id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
2547                                                id_priv->id.port_num, &path_rec,
2548                                                comp_mask, timeout_ms,
2549                                                GFP_KERNEL, cma_query_handler,
2550                                                work, &id_priv->query);
2551
2552         return (id_priv->query_id < 0) ? id_priv->query_id : 0;
2553 }
2554
2555 static void cma_work_handler(struct work_struct *_work)
2556 {
2557         struct cma_work *work = container_of(_work, struct cma_work, work);
2558         struct rdma_id_private *id_priv = work->id;
2559         int destroy = 0;
2560
2561         mutex_lock(&id_priv->handler_mutex);
2562         if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
2563                 goto out;
2564
2565         if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
2566                 cma_exch(id_priv, RDMA_CM_DESTROYING);
2567                 destroy = 1;
2568         }
2569 out:
2570         mutex_unlock(&id_priv->handler_mutex);
2571         cma_deref_id(id_priv);
2572         if (destroy)
2573                 rdma_destroy_id(&id_priv->id);
2574         kfree(work);
2575 }
2576
2577 static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
2578 {
2579         struct rdma_route *route = &id_priv->id.route;
2580         struct cma_work *work;
2581         int ret;
2582
2583         work = kzalloc(sizeof *work, GFP_KERNEL);
2584         if (!work)
2585                 return -ENOMEM;
2586
2587         work->id = id_priv;
2588         INIT_WORK(&work->work, cma_work_handler);
2589         work->old_state = RDMA_CM_ROUTE_QUERY;
2590         work->new_state = RDMA_CM_ROUTE_RESOLVED;
2591         work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2592
2593         route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
2594         if (!route->path_rec) {
2595                 ret = -ENOMEM;
2596                 goto err1;
2597         }
2598
2599         ret = cma_query_ib_route(id_priv, timeout_ms, work);
2600         if (ret)
2601                 goto err2;
2602
2603         return 0;
2604 err2:
2605         kfree(route->path_rec);
2606         route->path_rec = NULL;
2607 err1:
2608         kfree(work);
2609         return ret;
2610 }
2611
2612 int rdma_set_ib_paths(struct rdma_cm_id *id,
2613                       struct ib_sa_path_rec *path_rec, int num_paths)
2614 {
2615         struct rdma_id_private *id_priv;
2616         int ret;
2617
2618         id_priv = container_of(id, struct rdma_id_private, id);
2619         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2620                            RDMA_CM_ROUTE_RESOLVED))
2621                 return -EINVAL;
2622
2623         id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths,
2624                                      GFP_KERNEL);
2625         if (!id->route.path_rec) {
2626                 ret = -ENOMEM;
2627                 goto err;
2628         }
2629
2630         id->route.num_paths = num_paths;
2631         return 0;
2632 err:
2633         cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED);
2634         return ret;
2635 }
2636 EXPORT_SYMBOL(rdma_set_ib_paths);
2637
2638 static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
2639 {
2640         struct cma_work *work;
2641
2642         work = kzalloc(sizeof *work, GFP_KERNEL);
2643         if (!work)
2644                 return -ENOMEM;
2645
2646         work->id = id_priv;
2647         INIT_WORK(&work->work, cma_work_handler);
2648         work->old_state = RDMA_CM_ROUTE_QUERY;
2649         work->new_state = RDMA_CM_ROUTE_RESOLVED;
2650         work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2651         queue_work(cma_wq, &work->work);
2652         return 0;
2653 }
2654
2655 static int iboe_tos_to_sl(struct net_device *ndev, int tos)
2656 {
2657         /* get service level, SL, from IPv4 type of service, TOS */
2658         int sl = (tos >> 5) & 0x7;
2659
2660         /* final mappings are done by the vendor specific drivers */
2661         return sl;
2662 }
2663
2664 static enum ib_gid_type cma_route_gid_type(enum rdma_network_type network_type,
2665                                            unsigned long supported_gids,
2666                                            enum ib_gid_type default_gid)
2667 {
2668         if ((network_type == RDMA_NETWORK_IPV4 ||
2669              network_type == RDMA_NETWORK_IPV6) &&
2670             test_bit(IB_GID_TYPE_ROCE_UDP_ENCAP, &supported_gids))
2671                 return IB_GID_TYPE_ROCE_UDP_ENCAP;
2672
2673         return default_gid;
2674 }
2675
2676 static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
2677 {
2678         struct rdma_route *route = &id_priv->id.route;
2679         struct rdma_addr *addr = &route->addr;
2680         struct cma_work *work;
2681         int ret;
2682         struct net_device *ndev = NULL;
2683
2684
2685         work = kzalloc(sizeof *work, GFP_KERNEL);
2686         if (!work)
2687                 return -ENOMEM;
2688
2689         work->id = id_priv;
2690         INIT_WORK(&work->work, cma_work_handler);
2691
2692         route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
2693         if (!route->path_rec) {
2694                 ret = -ENOMEM;
2695                 goto err1;
2696         }
2697
2698         route->num_paths = 1;
2699
2700         if (addr->dev_addr.bound_dev_if) {
2701                 unsigned long supported_gids;
2702
2703                 ndev = dev_get_by_index(addr->dev_addr.net,
2704                                         addr->dev_addr.bound_dev_if);
2705                 if (!ndev) {
2706                         ret = -ENODEV;
2707                         goto err2;
2708                 }
2709
2710                 route->path_rec->net = ndev->if_vnet;
2711                 route->path_rec->ifindex = ndev->if_index;
2712                 supported_gids = roce_gid_type_mask_support(id_priv->id.device,
2713                                                             id_priv->id.port_num);
2714                 route->path_rec->gid_type =
2715                         cma_route_gid_type(addr->dev_addr.network,
2716                                            supported_gids,
2717                                            id_priv->gid_type);
2718         }
2719         if (!ndev) {
2720                 ret = -ENODEV;
2721                 goto err2;
2722         }
2723
2724         memcpy(route->path_rec->dmac, addr->dev_addr.dst_dev_addr, ETH_ALEN);
2725
2726         rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
2727                     &route->path_rec->sgid);
2728         rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.dst_addr,
2729                     &route->path_rec->dgid);
2730
2731         /* Use the hint from IP Stack to select GID Type */
2732         if (route->path_rec->gid_type < ib_network_to_gid_type(addr->dev_addr.network))
2733                 route->path_rec->gid_type = ib_network_to_gid_type(addr->dev_addr.network);
2734         if (((struct sockaddr *)&id_priv->id.route.addr.dst_addr)->sa_family != AF_IB)
2735                 /* TODO: get the hoplimit from the inet/inet6 device */
2736                 route->path_rec->hop_limit = addr->dev_addr.hoplimit;
2737         else
2738                 route->path_rec->hop_limit = 1;
2739         route->path_rec->reversible = 1;
2740         route->path_rec->pkey = cpu_to_be16(0xffff);
2741         route->path_rec->mtu_selector = IB_SA_EQ;
2742         route->path_rec->sl = iboe_tos_to_sl(ndev, id_priv->tos);
2743         route->path_rec->traffic_class = id_priv->tos;
2744         route->path_rec->mtu = iboe_get_mtu(ndev->if_mtu);
2745         route->path_rec->rate_selector = IB_SA_EQ;
2746         route->path_rec->rate = iboe_get_rate(ndev);
2747         dev_put(ndev);
2748         route->path_rec->packet_life_time_selector = IB_SA_EQ;
2749         route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
2750         if (!route->path_rec->mtu) {
2751                 ret = -EINVAL;
2752                 goto err2;
2753         }
2754
2755         work->old_state = RDMA_CM_ROUTE_QUERY;
2756         work->new_state = RDMA_CM_ROUTE_RESOLVED;
2757         work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2758         work->event.status = 0;
2759
2760         queue_work(cma_wq, &work->work);
2761
2762         return 0;
2763
2764 err2:
2765         kfree(route->path_rec);
2766         route->path_rec = NULL;
2767 err1:
2768         kfree(work);
2769         return ret;
2770 }
2771
2772 int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
2773 {
2774         struct rdma_id_private *id_priv;
2775         int ret;
2776
2777         id_priv = container_of(id, struct rdma_id_private, id);
2778         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY))
2779                 return -EINVAL;
2780
2781         atomic_inc(&id_priv->refcount);
2782         if (rdma_cap_ib_sa(id->device, id->port_num))
2783                 ret = cma_resolve_ib_route(id_priv, timeout_ms);
2784         else if (rdma_protocol_roce(id->device, id->port_num))
2785                 ret = cma_resolve_iboe_route(id_priv);
2786         else if (rdma_protocol_iwarp(id->device, id->port_num))
2787                 ret = cma_resolve_iw_route(id_priv, timeout_ms);
2788         else
2789                 ret = -ENOSYS;
2790
2791         if (ret)
2792                 goto err;
2793
2794         return 0;
2795 err:
2796         cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED);
2797         cma_deref_id(id_priv);
2798         return ret;
2799 }
2800 EXPORT_SYMBOL(rdma_resolve_route);
2801
2802 static void cma_set_loopback(struct sockaddr *addr)
2803 {
2804         switch (addr->sa_family) {
2805         case AF_INET:
2806                 ((struct sockaddr_in *) addr)->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
2807                 break;
2808         case AF_INET6:
2809                 ipv6_addr_set(&((struct sockaddr_in6 *) addr)->sin6_addr,
2810                               0, 0, 0, htonl(1));
2811                 break;
2812         default:
2813                 ib_addr_set(&((struct sockaddr_ib *) addr)->sib_addr,
2814                             0, 0, 0, htonl(1));
2815                 break;
2816         }
2817 }
2818
2819 static int cma_bind_loopback(struct rdma_id_private *id_priv)
2820 {
2821         struct cma_device *cma_dev, *cur_dev;
2822         struct ib_port_attr port_attr;
2823         union ib_gid gid;
2824         u16 pkey;
2825         int ret;
2826         u8 p;
2827
2828         cma_dev = NULL;
2829         mutex_lock(&lock);
2830         list_for_each_entry(cur_dev, &dev_list, list) {
2831                 if (cma_family(id_priv) == AF_IB &&
2832                     !rdma_cap_ib_cm(cur_dev->device, 1))
2833                         continue;
2834
2835                 if (!cma_dev)
2836                         cma_dev = cur_dev;
2837
2838                 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
2839                         if (!ib_query_port(cur_dev->device, p, &port_attr) &&
2840                             port_attr.state == IB_PORT_ACTIVE) {
2841                                 cma_dev = cur_dev;
2842                                 goto port_found;
2843                         }
2844                 }
2845         }
2846
2847         if (!cma_dev) {
2848                 ret = -ENODEV;
2849                 goto out;
2850         }
2851
2852         p = 1;
2853
2854 port_found:
2855         ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid, NULL);
2856         if (ret)
2857                 goto out;
2858
2859         ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
2860         if (ret)
2861                 goto out;
2862
2863         id_priv->id.route.addr.dev_addr.dev_type =
2864                 (rdma_protocol_ib(cma_dev->device, p)) ?
2865                 ARPHRD_INFINIBAND : ARPHRD_ETHER;
2866
2867         rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2868         ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
2869         id_priv->id.port_num = p;
2870         cma_attach_to_dev(id_priv, cma_dev);
2871         cma_set_loopback(cma_src_addr(id_priv));
2872 out:
2873         mutex_unlock(&lock);
2874         return ret;
2875 }
2876
2877 static void addr_handler(int status, struct sockaddr *src_addr,
2878                          struct rdma_dev_addr *dev_addr, void *context)
2879 {
2880         struct rdma_id_private *id_priv = context;
2881         struct rdma_cm_event event;
2882
2883         memset(&event, 0, sizeof event);
2884         mutex_lock(&id_priv->handler_mutex);
2885         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY,
2886                            RDMA_CM_ADDR_RESOLVED))
2887                 goto out;
2888
2889         memcpy(cma_src_addr(id_priv), src_addr, rdma_addr_size(src_addr));
2890         if (!status && !id_priv->cma_dev)
2891                 status = cma_acquire_dev(id_priv, NULL);
2892
2893         if (status) {
2894                 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2895                                    RDMA_CM_ADDR_BOUND))
2896                         goto out;
2897                 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2898                 event.status = status;
2899         } else
2900                 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2901
2902         if (id_priv->id.event_handler(&id_priv->id, &event)) {
2903                 cma_exch(id_priv, RDMA_CM_DESTROYING);
2904                 mutex_unlock(&id_priv->handler_mutex);
2905                 cma_deref_id(id_priv);
2906                 rdma_destroy_id(&id_priv->id);
2907                 return;
2908         }
2909 out:
2910         mutex_unlock(&id_priv->handler_mutex);
2911         cma_deref_id(id_priv);
2912 }
2913
2914 static int cma_resolve_loopback(struct rdma_id_private *id_priv)
2915 {
2916         struct cma_work *work;
2917         union ib_gid gid;
2918         int ret;
2919
2920         work = kzalloc(sizeof *work, GFP_KERNEL);
2921         if (!work)
2922                 return -ENOMEM;
2923
2924         if (!id_priv->cma_dev) {
2925                 ret = cma_bind_loopback(id_priv);
2926                 if (ret)
2927                         goto err;
2928         }
2929
2930         rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2931         rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
2932
2933         work->id = id_priv;
2934         INIT_WORK(&work->work, cma_work_handler);
2935         work->old_state = RDMA_CM_ADDR_QUERY;
2936         work->new_state = RDMA_CM_ADDR_RESOLVED;
2937         work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2938         queue_work(cma_wq, &work->work);
2939         return 0;
2940 err:
2941         kfree(work);
2942         return ret;
2943 }
2944
2945 static int cma_resolve_ib_addr(struct rdma_id_private *id_priv)
2946 {
2947         struct cma_work *work;
2948         int ret;
2949
2950         work = kzalloc(sizeof *work, GFP_KERNEL);
2951         if (!work)
2952                 return -ENOMEM;
2953
2954         if (!id_priv->cma_dev) {
2955                 ret = cma_resolve_ib_dev(id_priv);
2956                 if (ret)
2957                         goto err;
2958         }
2959
2960         rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, (union ib_gid *)
2961                 &(((struct sockaddr_ib *) &id_priv->id.route.addr.dst_addr)->sib_addr));
2962
2963         work->id = id_priv;
2964         INIT_WORK(&work->work, cma_work_handler);
2965         work->old_state = RDMA_CM_ADDR_QUERY;
2966         work->new_state = RDMA_CM_ADDR_RESOLVED;
2967         work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2968         queue_work(cma_wq, &work->work);
2969         return 0;
2970 err:
2971         kfree(work);
2972         return ret;
2973 }
2974
2975 static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2976                          struct sockaddr *dst_addr)
2977 {
2978         if (!src_addr || !src_addr->sa_family) {
2979                 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
2980                 src_addr->sa_family = dst_addr->sa_family;
2981                 if (dst_addr->sa_family == AF_INET6) {
2982                         struct sockaddr_in6 *src_addr6 = (struct sockaddr_in6 *) src_addr;
2983                         struct sockaddr_in6 *dst_addr6 = (struct sockaddr_in6 *) dst_addr;
2984                         src_addr6->sin6_scope_id = dst_addr6->sin6_scope_id;
2985                         if (IN6_IS_SCOPE_LINKLOCAL(&dst_addr6->sin6_addr) ||
2986                             IN6_IS_ADDR_MC_INTFACELOCAL(&dst_addr6->sin6_addr))
2987                                 id->route.addr.dev_addr.bound_dev_if = dst_addr6->sin6_scope_id;
2988                 } else if (dst_addr->sa_family == AF_IB) {
2989                         ((struct sockaddr_ib *) src_addr)->sib_pkey =
2990                                 ((struct sockaddr_ib *) dst_addr)->sib_pkey;
2991                 }
2992         }
2993         return rdma_bind_addr(id, src_addr);
2994 }
2995
2996 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2997                       struct sockaddr *dst_addr, int timeout_ms)
2998 {
2999         struct rdma_id_private *id_priv;
3000         int ret;
3001
3002         id_priv = container_of(id, struct rdma_id_private, id);
3003         if (id_priv->state == RDMA_CM_IDLE) {
3004                 ret = cma_bind_addr(id, src_addr, dst_addr);
3005                 if (ret)
3006                         return ret;
3007         }
3008
3009         if (cma_family(id_priv) != dst_addr->sa_family)
3010                 return -EINVAL;
3011
3012         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY))
3013                 return -EINVAL;
3014
3015         atomic_inc(&id_priv->refcount);
3016         memcpy(cma_dst_addr(id_priv), dst_addr, rdma_addr_size(dst_addr));
3017         if (cma_any_addr(dst_addr)) {
3018                 ret = cma_resolve_loopback(id_priv);
3019         } else {
3020                 if (dst_addr->sa_family == AF_IB) {
3021                         ret = cma_resolve_ib_addr(id_priv);
3022                 } else {
3023                         ret = cma_check_linklocal(&id->route.addr.dev_addr, dst_addr);
3024                         if (ret)
3025                                 goto err;
3026
3027                         ret = rdma_resolve_ip(&addr_client, cma_src_addr(id_priv),
3028                                               dst_addr, &id->route.addr.dev_addr,
3029                                               timeout_ms, addr_handler, id_priv);
3030                 }
3031         }
3032         if (ret)
3033                 goto err;
3034
3035         return 0;
3036 err:
3037         cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
3038         cma_deref_id(id_priv);
3039         return ret;
3040 }
3041 EXPORT_SYMBOL(rdma_resolve_addr);
3042
3043 int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
3044 {
3045         struct rdma_id_private *id_priv;
3046         unsigned long flags;
3047         int ret;
3048
3049         id_priv = container_of(id, struct rdma_id_private, id);
3050         spin_lock_irqsave(&id_priv->lock, flags);
3051         if (reuse || id_priv->state == RDMA_CM_IDLE) {
3052                 id_priv->reuseaddr = reuse;
3053                 ret = 0;
3054         } else {
3055                 ret = -EINVAL;
3056         }
3057         spin_unlock_irqrestore(&id_priv->lock, flags);
3058         return ret;
3059 }
3060 EXPORT_SYMBOL(rdma_set_reuseaddr);
3061
3062 int rdma_set_afonly(struct rdma_cm_id *id, int afonly)
3063 {
3064         struct rdma_id_private *id_priv;
3065         unsigned long flags;
3066         int ret;
3067
3068         id_priv = container_of(id, struct rdma_id_private, id);
3069         spin_lock_irqsave(&id_priv->lock, flags);
3070         if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) {
3071                 id_priv->options |= (1 << CMA_OPTION_AFONLY);
3072                 id_priv->afonly = afonly;
3073                 ret = 0;
3074         } else {
3075                 ret = -EINVAL;
3076         }
3077         spin_unlock_irqrestore(&id_priv->lock, flags);
3078         return ret;
3079 }
3080 EXPORT_SYMBOL(rdma_set_afonly);
3081
3082 static void cma_bind_port(struct rdma_bind_list *bind_list,
3083                           struct rdma_id_private *id_priv)
3084 {
3085         struct sockaddr *addr;
3086         struct sockaddr_ib *sib;
3087         u64 sid, mask;
3088         __be16 port;
3089
3090         addr = cma_src_addr(id_priv);
3091         port = htons(bind_list->port);
3092
3093         switch (addr->sa_family) {
3094         case AF_INET:
3095                 ((struct sockaddr_in *) addr)->sin_port = port;
3096                 break;
3097         case AF_INET6:
3098                 ((struct sockaddr_in6 *) addr)->sin6_port = port;
3099                 break;
3100         case AF_IB:
3101                 sib = (struct sockaddr_ib *) addr;
3102                 sid = be64_to_cpu(sib->sib_sid);
3103                 mask = be64_to_cpu(sib->sib_sid_mask);
3104                 sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port));
3105                 sib->sib_sid_mask = cpu_to_be64(~0ULL);
3106                 break;
3107         }
3108         id_priv->bind_list = bind_list;
3109         hlist_add_head(&id_priv->node, &bind_list->owners);
3110 }
3111
3112 static int cma_alloc_port(enum rdma_port_space ps,
3113                           struct rdma_id_private *id_priv, unsigned short snum)
3114 {
3115         struct rdma_bind_list *bind_list;
3116         int ret;
3117
3118         bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
3119         if (!bind_list)
3120                 return -ENOMEM;
3121
3122         ret = cma_ps_alloc(id_priv->id.route.addr.dev_addr.net, ps, bind_list,
3123                            snum);
3124         if (ret < 0)
3125                 goto err;
3126
3127         bind_list->ps = ps;
3128         bind_list->port = (unsigned short)ret;
3129         cma_bind_port(bind_list, id_priv);
3130         return 0;
3131 err:
3132         kfree(bind_list);
3133         return ret == -ENOSPC ? -EADDRNOTAVAIL : ret;
3134 }
3135
3136 static int cma_alloc_any_port(enum rdma_port_space ps,
3137                               struct rdma_id_private *id_priv)
3138 {
3139         static unsigned int last_used_port;
3140         int low, high, remaining;
3141         unsigned int rover;
3142         struct vnet *net = id_priv->id.route.addr.dev_addr.net;
3143         u32 rand;
3144
3145         inet_get_local_port_range(net, &low, &high);
3146         remaining = (high - low) + 1;
3147         get_random_bytes(&rand, sizeof(rand));
3148         rover = rand % remaining + low;
3149 retry:
3150         if (last_used_port != rover &&
3151             !cma_ps_find(net, ps, (unsigned short)rover)) {
3152                 int ret = cma_alloc_port(ps, id_priv, rover);
3153                 /*
3154                  * Remember previously used port number in order to avoid
3155                  * re-using same port immediately after it is closed.
3156                  */
3157                 if (!ret)
3158                         last_used_port = rover;
3159                 if (ret != -EADDRNOTAVAIL)
3160                         return ret;
3161         }
3162         if (--remaining) {
3163                 rover++;
3164                 if ((rover < low) || (rover > high))
3165                         rover = low;
3166                 goto retry;
3167         }
3168         return -EADDRNOTAVAIL;
3169 }
3170
3171 /*
3172  * Check that the requested port is available.  This is called when trying to
3173  * bind to a specific port, or when trying to listen on a bound port.  In
3174  * the latter case, the provided id_priv may already be on the bind_list, but
3175  * we still need to check that it's okay to start listening.
3176  */
3177 static int cma_check_port(struct rdma_bind_list *bind_list,
3178                           struct rdma_id_private *id_priv, uint8_t reuseaddr)
3179 {
3180         struct rdma_id_private *cur_id;
3181         struct sockaddr *addr, *cur_addr;
3182
3183         addr = cma_src_addr(id_priv);
3184         hlist_for_each_entry(cur_id, &bind_list->owners, node) {
3185                 if (id_priv == cur_id)
3186                         continue;
3187
3188                 if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr &&
3189                     cur_id->reuseaddr)
3190                         continue;
3191
3192                 cur_addr = cma_src_addr(cur_id);
3193                 if (id_priv->afonly && cur_id->afonly &&
3194                     (addr->sa_family != cur_addr->sa_family))
3195                         continue;
3196
3197                 if (cma_any_addr(addr) || cma_any_addr(cur_addr))
3198                         return -EADDRNOTAVAIL;
3199
3200                 if (!cma_addr_cmp(addr, cur_addr))
3201                         return -EADDRINUSE;
3202         }
3203         return 0;
3204 }
3205
3206 static int cma_use_port(enum rdma_port_space ps,
3207                         struct rdma_id_private *id_priv)
3208 {
3209         struct rdma_bind_list *bind_list;
3210         unsigned short snum;
3211         int ret;
3212
3213         snum = ntohs(cma_port(cma_src_addr(id_priv)));
3214         if (snum < IPPORT_RESERVED &&
3215             priv_check(curthread, PRIV_NETINET_BINDANY) != 0)
3216                 return -EACCES;
3217
3218         bind_list = cma_ps_find(id_priv->id.route.addr.dev_addr.net, ps, snum);
3219         if (!bind_list) {
3220                 ret = cma_alloc_port(ps, id_priv, snum);
3221         } else {
3222                 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
3223                 if (!ret)
3224                         cma_bind_port(bind_list, id_priv);
3225         }
3226         return ret;
3227 }
3228
3229 static int cma_bind_listen(struct rdma_id_private *id_priv)
3230 {
3231         struct rdma_bind_list *bind_list = id_priv->bind_list;
3232         int ret = 0;
3233
3234         mutex_lock(&lock);
3235         if (bind_list->owners.first->next)
3236                 ret = cma_check_port(bind_list, id_priv, 0);
3237         mutex_unlock(&lock);
3238         return ret;
3239 }
3240
3241 static enum rdma_port_space cma_select_inet_ps(
3242                 struct rdma_id_private *id_priv)
3243 {
3244         switch (id_priv->id.ps) {
3245         case RDMA_PS_TCP:
3246         case RDMA_PS_UDP:
3247         case RDMA_PS_IPOIB:
3248         case RDMA_PS_IB:
3249         case RDMA_PS_SDP:
3250                 return id_priv->id.ps;
3251         default:
3252
3253                 return 0;
3254         }
3255 }
3256
3257 static enum rdma_port_space cma_select_ib_ps(struct rdma_id_private *id_priv)
3258 {
3259         enum rdma_port_space ps = 0;
3260         struct sockaddr_ib *sib;
3261         u64 sid_ps, mask, sid;
3262
3263         sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
3264         mask = be64_to_cpu(sib->sib_sid_mask) & RDMA_IB_IP_PS_MASK;
3265         sid = be64_to_cpu(sib->sib_sid) & mask;
3266
3267         if ((id_priv->id.ps == RDMA_PS_IB) && (sid == (RDMA_IB_IP_PS_IB & mask))) {
3268                 sid_ps = RDMA_IB_IP_PS_IB;
3269                 ps = RDMA_PS_IB;
3270         } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_TCP)) &&
3271                    (sid == (RDMA_IB_IP_PS_TCP & mask))) {
3272                 sid_ps = RDMA_IB_IP_PS_TCP;
3273                 ps = RDMA_PS_TCP;
3274         } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_UDP)) &&
3275                    (sid == (RDMA_IB_IP_PS_UDP & mask))) {
3276                 sid_ps = RDMA_IB_IP_PS_UDP;
3277                 ps = RDMA_PS_UDP;
3278         }
3279
3280         if (ps) {
3281                 sib->sib_sid = cpu_to_be64(sid_ps | ntohs(cma_port((struct sockaddr *) sib)));
3282                 sib->sib_sid_mask = cpu_to_be64(RDMA_IB_IP_PS_MASK |
3283                                                 be64_to_cpu(sib->sib_sid_mask));
3284         }
3285         return ps;
3286 }
3287
3288 static int cma_get_port(struct rdma_id_private *id_priv)
3289 {
3290         enum rdma_port_space ps;
3291         int ret;
3292
3293         if (cma_family(id_priv) != AF_IB)
3294                 ps = cma_select_inet_ps(id_priv);
3295         else
3296                 ps = cma_select_ib_ps(id_priv);
3297         if (!ps)
3298                 return -EPROTONOSUPPORT;
3299
3300         mutex_lock(&lock);
3301         if (cma_any_port(cma_src_addr(id_priv)))
3302                 ret = cma_alloc_any_port(ps, id_priv);
3303         else
3304                 ret = cma_use_port(ps, id_priv);
3305         mutex_unlock(&lock);
3306
3307         return ret;
3308 }
3309
3310 static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
3311                                struct sockaddr *addr)
3312 {
3313 #ifdef INET6
3314         struct sockaddr_in6 sin6;
3315
3316         if (addr->sa_family != AF_INET6)
3317                 return 0;
3318
3319         sin6 = *(struct sockaddr_in6 *)addr;
3320
3321         if (IN6_IS_SCOPE_LINKLOCAL(&sin6.sin6_addr) ||
3322             IN6_IS_ADDR_MC_INTFACELOCAL(&sin6.sin6_addr)) {
3323                 bool failure;
3324
3325                 CURVNET_SET_QUIET(dev_addr->net);
3326                 failure = sa6_recoverscope(&sin6) || sin6.sin6_scope_id == 0;
3327                 CURVNET_RESTORE();
3328
3329                 /* check if IPv6 scope ID is not set */
3330                 if (failure)
3331                         return -EINVAL;
3332                 dev_addr->bound_dev_if = sin6.sin6_scope_id;
3333         }
3334 #endif
3335         return 0;
3336 }
3337
3338 int rdma_listen(struct rdma_cm_id *id, int backlog)
3339 {
3340         struct rdma_id_private *id_priv;
3341         int ret;
3342
3343         id_priv = container_of(id, struct rdma_id_private, id);
3344         if (id_priv->state == RDMA_CM_IDLE) {
3345                 id->route.addr.src_addr.ss_family = AF_INET;
3346                 ret = rdma_bind_addr(id, cma_src_addr(id_priv));
3347                 if (ret)
3348                         return ret;
3349         }
3350
3351         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN))
3352                 return -EINVAL;
3353
3354         if (id_priv->reuseaddr) {
3355                 ret = cma_bind_listen(id_priv);
3356                 if (ret)
3357                         goto err;
3358         }
3359
3360         id_priv->backlog = backlog;
3361         if (id->device) {
3362                 if (rdma_cap_ib_cm(id->device, 1)) {
3363                         ret = cma_ib_listen(id_priv);
3364                         if (ret)
3365                                 goto err;
3366                 } else if (rdma_cap_iw_cm(id->device, 1)) {
3367                         ret = cma_iw_listen(id_priv, backlog);
3368                         if (ret)
3369                                 goto err;
3370                 } else {
3371                         ret = -ENOSYS;
3372                         goto err;
3373                 }
3374         } else
3375                 cma_listen_on_all(id_priv);
3376
3377         return 0;
3378 err:
3379         id_priv->backlog = 0;
3380         cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND);
3381         return ret;
3382 }
3383 EXPORT_SYMBOL(rdma_listen);
3384
3385 int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
3386 {
3387         struct rdma_id_private *id_priv;
3388         int ret;
3389
3390         if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6 &&
3391             addr->sa_family != AF_IB)
3392                 return -EAFNOSUPPORT;
3393
3394         id_priv = container_of(id, struct rdma_id_private, id);
3395         if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND))
3396                 return -EINVAL;
3397
3398         ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
3399         if (ret)
3400                 goto err1;
3401
3402         memcpy(cma_src_addr(id_priv), addr, rdma_addr_size(addr));
3403         if (!cma_any_addr(addr)) {
3404                 ret = cma_translate_addr(addr, &id->route.addr.dev_addr);
3405                 if (ret)
3406                         goto err1;
3407
3408                 ret = cma_acquire_dev(id_priv, NULL);
3409                 if (ret)
3410                         goto err1;
3411         }
3412
3413         if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) {
3414                 if (addr->sa_family == AF_INET)
3415                         id_priv->afonly = 1;
3416 #ifdef INET6
3417                 else if (addr->sa_family == AF_INET6) {
3418                         CURVNET_SET_QUIET(id_priv->id.route.addr.dev_addr.net);
3419                         id_priv->afonly = V_ip6_v6only;
3420                         CURVNET_RESTORE();
3421                 }
3422 #endif
3423         }
3424         ret = cma_get_port(id_priv);
3425         if (ret)
3426                 goto err2;
3427
3428         return 0;
3429 err2:
3430         if (id_priv->cma_dev)
3431                 cma_release_dev(id_priv);
3432 err1:
3433         cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE);
3434         return ret;
3435 }
3436 EXPORT_SYMBOL(rdma_bind_addr);
3437
3438 static int sdp_format_hdr(struct sdp_hh *sdp_hdr, struct rdma_id_private *id_priv)
3439 {
3440         /*
3441          * XXXCEM: CMA just sets the version itself rather than relying on
3442          * passed in packet to have the major version set.  Should we?
3443          */
3444         if (sdp_get_majv(sdp_hdr->majv_minv) != SDP_MAJ_VERSION)
3445                 return -EINVAL;
3446
3447         if (cma_family(id_priv) == AF_INET) {
3448                 struct sockaddr_in *src4, *dst4;
3449
3450                 src4 = (struct sockaddr_in *) cma_src_addr(id_priv);
3451                 dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv);
3452
3453                 sdp_set_ip_ver(sdp_hdr, 4);
3454                 sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
3455                 sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
3456                 sdp_hdr->port = src4->sin_port;
3457         } else if (cma_family(id_priv) == AF_INET6) {
3458                 struct sockaddr_in6 *src6, *dst6;
3459
3460                 src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
3461                 dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv);
3462
3463                 sdp_set_ip_ver(sdp_hdr, 6);
3464                 sdp_hdr->src_addr.ip6 = src6->sin6_addr;
3465                 sdp_hdr->dst_addr.ip6 = dst6->sin6_addr;
3466                 sdp_hdr->port = src6->sin6_port;
3467                 cma_ip6_clear_scope_id(&sdp_hdr->src_addr.ip6);
3468                 cma_ip6_clear_scope_id(&sdp_hdr->dst_addr.ip6);
3469         } else
3470                 return -EAFNOSUPPORT;
3471         return 0;
3472 }
3473
3474 static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv)
3475 {
3476         struct cma_hdr *cma_hdr;
3477
3478         if (id_priv->id.ps == RDMA_PS_SDP)
3479                 return sdp_format_hdr(hdr, id_priv);
3480
3481         cma_hdr = hdr;
3482         cma_hdr->cma_version = CMA_VERSION;
3483         if (cma_family(id_priv) == AF_INET) {
3484                 struct sockaddr_in *src4, *dst4;
3485
3486                 src4 = (struct sockaddr_in *) cma_src_addr(id_priv);
3487                 dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv);
3488
3489                 cma_set_ip_ver(cma_hdr, 4);
3490                 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
3491                 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
3492                 cma_hdr->port = src4->sin_port;
3493         } else if (cma_family(id_priv) == AF_INET6) {
3494                 struct sockaddr_in6 *src6, *dst6;
3495
3496                 src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
3497                 dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv);
3498
3499                 cma_set_ip_ver(cma_hdr, 6);
3500                 cma_hdr->src_addr.ip6 = src6->sin6_addr;
3501                 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
3502                 cma_hdr->port = src6->sin6_port;
3503                 cma_ip6_clear_scope_id(&cma_hdr->src_addr.ip6);
3504                 cma_ip6_clear_scope_id(&cma_hdr->dst_addr.ip6);
3505         }
3506         return 0;
3507 }
3508
3509 static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
3510                                 struct ib_cm_event *ib_event)
3511 {
3512         struct rdma_id_private *id_priv = cm_id->context;
3513         struct rdma_cm_event event;
3514         struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
3515         int ret = 0;
3516
3517         mutex_lock(&id_priv->handler_mutex);
3518         if (id_priv->state != RDMA_CM_CONNECT)
3519                 goto out;
3520
3521         memset(&event, 0, sizeof event);
3522         switch (ib_event->event) {
3523         case IB_CM_SIDR_REQ_ERROR:
3524                 event.event = RDMA_CM_EVENT_UNREACHABLE;
3525                 event.status = -ETIMEDOUT;
3526                 break;
3527         case IB_CM_SIDR_REP_RECEIVED:
3528                 event.param.ud.private_data = ib_event->private_data;
3529                 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
3530                 if (rep->status != IB_SIDR_SUCCESS) {
3531                         event.event = RDMA_CM_EVENT_UNREACHABLE;
3532                         event.status = ib_event->param.sidr_rep_rcvd.status;
3533                         break;
3534                 }
3535                 ret = cma_set_qkey(id_priv, rep->qkey);
3536                 if (ret) {
3537                         event.event = RDMA_CM_EVENT_ADDR_ERROR;
3538                         event.status = ret;
3539                         break;
3540                 }
3541                 ret = ib_init_ah_from_path(id_priv->id.device,
3542                                            id_priv->id.port_num,
3543                                            id_priv->id.route.path_rec,
3544                                            &event.param.ud.ah_attr);
3545                 if (ret) {
3546                         event.event = RDMA_CM_EVENT_ADDR_ERROR;
3547                         event.status = ret;
3548                         break;
3549                 }
3550                 event.param.ud.qp_num = rep->qpn;
3551                 event.param.ud.qkey = rep->qkey;
3552                 event.event = RDMA_CM_EVENT_ESTABLISHED;
3553                 event.status = 0;
3554                 break;
3555         default:
3556                 pr_err("RDMA CMA: unexpected IB CM event: %d\n",
3557                        ib_event->event);
3558                 goto out;
3559         }
3560
3561         ret = id_priv->id.event_handler(&id_priv->id, &event);
3562         if (ret) {
3563                 /* Destroy the CM ID by returning a non-zero value. */
3564                 id_priv->cm_id.ib = NULL;
3565                 cma_exch(id_priv, RDMA_CM_DESTROYING);
3566                 mutex_unlock(&id_priv->handler_mutex);
3567                 rdma_destroy_id(&id_priv->id);
3568                 return ret;
3569         }
3570 out:
3571         mutex_unlock(&id_priv->handler_mutex);
3572         return ret;
3573 }
3574
3575 static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
3576                               struct rdma_conn_param *conn_param)
3577 {
3578         struct ib_cm_sidr_req_param req;
3579         struct ib_cm_id *id;
3580         void *private_data;
3581         int offset, ret;
3582
3583         memset(&req, 0, sizeof req);
3584         offset = cma_user_data_offset(id_priv);
3585         req.private_data_len = offset + conn_param->private_data_len;
3586         if (req.private_data_len < conn_param->private_data_len)
3587                 return -EINVAL;
3588
3589         if (req.private_data_len) {
3590                 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
3591                 if (!private_data)
3592                         return -ENOMEM;
3593         } else {
3594                 private_data = NULL;
3595         }
3596
3597         if (conn_param->private_data && conn_param->private_data_len)
3598                 memcpy((char *)private_data + offset, conn_param->private_data,
3599                        conn_param->private_data_len);
3600
3601         if (private_data) {
3602                 ret = cma_format_hdr(private_data, id_priv);
3603                 if (ret)
3604                         goto out;
3605                 req.private_data = private_data;
3606         }
3607
3608         id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler,
3609                              id_priv);
3610         if (IS_ERR(id)) {
3611                 ret = PTR_ERR(id);
3612                 goto out;
3613         }
3614         id_priv->cm_id.ib = id;
3615
3616         req.path = id_priv->id.route.path_rec;
3617         req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
3618         req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
3619         req.max_cm_retries = CMA_MAX_CM_RETRIES;
3620
3621         ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
3622         if (ret) {
3623                 ib_destroy_cm_id(id_priv->cm_id.ib);
3624                 id_priv->cm_id.ib = NULL;
3625         }
3626 out:
3627         kfree(private_data);
3628         return ret;
3629 }
3630
3631 static int cma_connect_ib(struct rdma_id_private *id_priv,
3632                           struct rdma_conn_param *conn_param)
3633 {
3634         struct ib_cm_req_param req;
3635         struct rdma_route *route;
3636         void *private_data;
3637         struct ib_cm_id *id;
3638         int offset, ret;
3639
3640         memset(&req, 0, sizeof req);
3641         offset = cma_user_data_offset(id_priv);
3642         req.private_data_len = offset + conn_param->private_data_len;
3643         if (req.private_data_len < conn_param->private_data_len)
3644                 return -EINVAL;
3645
3646         if (req.private_data_len) {
3647                 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
3648                 if (!private_data)
3649                         return -ENOMEM;
3650         } else {
3651                 private_data = NULL;
3652         }
3653
3654         if (conn_param->private_data && conn_param->private_data_len)
3655                 memcpy((char *)private_data + offset, conn_param->private_data,
3656                        conn_param->private_data_len);
3657
3658         id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv);
3659         if (IS_ERR(id)) {
3660                 ret = PTR_ERR(id);
3661                 goto out;
3662         }
3663         id_priv->cm_id.ib = id;
3664
3665         route = &id_priv->id.route;
3666         if (private_data) {
3667                 ret = cma_format_hdr(private_data, id_priv);
3668                 if (ret)
3669                         goto out;
3670                 req.private_data = private_data;
3671         }
3672
3673         req.primary_path = &route->path_rec[0];
3674         if (route->num_paths == 2)
3675                 req.alternate_path = &route->path_rec[1];
3676
3677         req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
3678         req.qp_num = id_priv->qp_num;
3679         req.qp_type = id_priv->id.qp_type;
3680         req.starting_psn = id_priv->seq_num;
3681         req.responder_resources = conn_param->responder_resources;
3682         req.initiator_depth = conn_param->initiator_depth;
3683         req.flow_control = conn_param->flow_control;
3684         req.retry_count = min_t(u8, 7, conn_param->retry_count);
3685         req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
3686         req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
3687         req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
3688         req.max_cm_retries = CMA_MAX_CM_RETRIES;
3689         req.srq = id_priv->srq ? 1 : 0;
3690
3691         ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
3692 out:
3693         if (ret && !IS_ERR(id)) {
3694                 ib_destroy_cm_id(id);
3695                 id_priv->cm_id.ib = NULL;
3696         }
3697
3698         kfree(private_data);
3699         return ret;
3700 }
3701
3702 static int cma_connect_iw(struct rdma_id_private *id_priv,
3703                           struct rdma_conn_param *conn_param)
3704 {
3705         struct iw_cm_id *cm_id;
3706         int ret;
3707         struct iw_cm_conn_param iw_param;
3708
3709         cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
3710         if (IS_ERR(cm_id))
3711                 return PTR_ERR(cm_id);
3712
3713         cm_id->tos = id_priv->tos;
3714         id_priv->cm_id.iw = cm_id;
3715
3716         memcpy(&cm_id->local_addr, cma_src_addr(id_priv),
3717                rdma_addr_size(cma_src_addr(id_priv)));
3718         memcpy(&cm_id->remote_addr, cma_dst_addr(id_priv),
3719                rdma_addr_size(cma_dst_addr(id_priv)));
3720
3721         ret = cma_modify_qp_rtr(id_priv, conn_param);
3722         if (ret)
3723                 goto out;
3724
3725         if (conn_param) {
3726                 iw_param.ord = conn_param->initiator_depth;
3727                 iw_param.ird = conn_param->responder_resources;
3728                 iw_param.private_data = conn_param->private_data;
3729                 iw_param.private_data_len = conn_param->private_data_len;
3730                 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num;
3731         } else {
3732                 memset(&iw_param, 0, sizeof iw_param);
3733                 iw_param.qpn = id_priv->qp_num;
3734         }
3735         ret = iw_cm_connect(cm_id, &iw_param);
3736 out:
3737         if (ret) {
3738                 iw_destroy_cm_id(cm_id);
3739                 id_priv->cm_id.iw = NULL;
3740         }
3741         return ret;
3742 }
3743
3744 int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
3745 {
3746         struct rdma_id_private *id_priv;
3747         int ret;
3748
3749         id_priv = container_of(id, struct rdma_id_private, id);
3750         if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT))
3751                 return -EINVAL;
3752
3753         if (!id->qp) {
3754                 id_priv->qp_num = conn_param->qp_num;
3755                 id_priv->srq = conn_param->srq;
3756         }
3757
3758         if (rdma_cap_ib_cm(id->device, id->port_num)) {
3759                 if (id->qp_type == IB_QPT_UD)
3760                         ret = cma_resolve_ib_udp(id_priv, conn_param);
3761                 else
3762                         ret = cma_connect_ib(id_priv, conn_param);
3763         } else if (rdma_cap_iw_cm(id->device, id->port_num))
3764                 ret = cma_connect_iw(id_priv, conn_param);
3765         else
3766                 ret = -ENOSYS;
3767         if (ret)
3768                 goto err;
3769
3770         return 0;
3771 err:
3772         cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED);
3773         return ret;
3774 }
3775 EXPORT_SYMBOL(rdma_connect);
3776
3777 static int cma_accept_ib(struct rdma_id_private *id_priv,
3778                          struct rdma_conn_param *conn_param)
3779 {
3780         struct ib_cm_rep_param rep;
3781         int ret;
3782
3783         ret = cma_modify_qp_rtr(id_priv, conn_param);
3784         if (ret)
3785                 goto out;
3786
3787         ret = cma_modify_qp_rts(id_priv, conn_param);
3788         if (ret)
3789                 goto out;
3790
3791         memset(&rep, 0, sizeof rep);
3792         rep.qp_num = id_priv->qp_num;
3793         rep.starting_psn = id_priv->seq_num;
3794         rep.private_data = conn_param->private_data;
3795         rep.private_data_len = conn_param->private_data_len;
3796         rep.responder_resources = conn_param->responder_resources;
3797         rep.initiator_depth = conn_param->initiator_depth;
3798         rep.failover_accepted = 0;
3799         rep.flow_control = conn_param->flow_control;
3800         rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
3801         rep.srq = id_priv->srq ? 1 : 0;
3802
3803         ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
3804 out:
3805         return ret;
3806 }
3807
3808 static int cma_accept_iw(struct rdma_id_private *id_priv,
3809                   struct rdma_conn_param *conn_param)
3810 {
3811         struct iw_cm_conn_param iw_param;
3812         int ret;
3813
3814         ret = cma_modify_qp_rtr(id_priv, conn_param);
3815         if (ret)
3816                 return ret;
3817
3818         iw_param.ord = conn_param->initiator_depth;
3819         iw_param.ird = conn_param->responder_resources;
3820         iw_param.private_data = conn_param->private_data;
3821         iw_param.private_data_len = conn_param->private_data_len;
3822         if (id_priv->id.qp) {
3823                 iw_param.qpn = id_priv->qp_num;
3824         } else
3825                 iw_param.qpn = conn_param->qp_num;
3826
3827         return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
3828 }
3829
3830 static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
3831                              enum ib_cm_sidr_status status, u32 qkey,
3832                              const void *private_data, int private_data_len)
3833 {
3834         struct ib_cm_sidr_rep_param rep;
3835         int ret;
3836
3837         memset(&rep, 0, sizeof rep);
3838         rep.status = status;
3839         if (status == IB_SIDR_SUCCESS) {
3840                 ret = cma_set_qkey(id_priv, qkey);
3841                 if (ret)
3842                         return ret;
3843                 rep.qp_num = id_priv->qp_num;
3844                 rep.qkey = id_priv->qkey;
3845         }
3846         rep.private_data = private_data;
3847         rep.private_data_len = private_data_len;
3848
3849         return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
3850 }
3851
3852 int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
3853 {
3854         struct rdma_id_private *id_priv;
3855         int ret;
3856
3857         id_priv = container_of(id, struct rdma_id_private, id);
3858
3859         id_priv->owner = task_pid_nr(current);
3860
3861         if (!cma_comp(id_priv, RDMA_CM_CONNECT))
3862                 return -EINVAL;
3863
3864         if (!id->qp && conn_param) {
3865                 id_priv->qp_num = conn_param->qp_num;
3866                 id_priv->srq = conn_param->srq;
3867         }
3868
3869         if (rdma_cap_ib_cm(id->device, id->port_num)) {
3870                 if (id->qp_type == IB_QPT_UD) {
3871                         if (conn_param)
3872                                 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
3873                                                         conn_param->qkey,
3874                                                         conn_param->private_data,
3875                                                         conn_param->private_data_len);
3876                         else
3877                                 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
3878                                                         0, NULL, 0);
3879                 } else {
3880                         if (conn_param)
3881                                 ret = cma_accept_ib(id_priv, conn_param);
3882                         else
3883                                 ret = cma_rep_recv(id_priv);
3884                 }
3885         } else if (rdma_cap_iw_cm(id->device, id->port_num))
3886                 ret = cma_accept_iw(id_priv, conn_param);
3887         else
3888                 ret = -ENOSYS;
3889
3890         if (ret)
3891                 goto reject;
3892
3893         return 0;
3894 reject:
3895         cma_modify_qp_err(id_priv);
3896         rdma_reject(id, NULL, 0);
3897         return ret;
3898 }
3899 EXPORT_SYMBOL(rdma_accept);
3900
3901 int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
3902 {
3903         struct rdma_id_private *id_priv;
3904         int ret;
3905
3906         id_priv = container_of(id, struct rdma_id_private, id);
3907         if (!id_priv->cm_id.ib)
3908                 return -EINVAL;
3909
3910         switch (id->device->node_type) {
3911         case RDMA_NODE_IB_CA:
3912                 ret = ib_cm_notify(id_priv->cm_id.ib, event);
3913                 break;
3914         default:
3915                 ret = 0;
3916                 break;
3917         }
3918         return ret;
3919 }
3920 EXPORT_SYMBOL(rdma_notify);
3921
3922 int rdma_reject(struct rdma_cm_id *id, const void *private_data,
3923                 u8 private_data_len)
3924 {
3925         struct rdma_id_private *id_priv;
3926         int ret;
3927
3928         id_priv = container_of(id, struct rdma_id_private, id);
3929         if (!id_priv->cm_id.ib)
3930                 return -EINVAL;
3931
3932         if (rdma_cap_ib_cm(id->device, id->port_num)) {
3933                 if (id->qp_type == IB_QPT_UD)
3934                         ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0,
3935                                                 private_data, private_data_len);
3936                 else
3937                         ret = ib_send_cm_rej(id_priv->cm_id.ib,
3938                                              IB_CM_REJ_CONSUMER_DEFINED, NULL,
3939                                              0, private_data, private_data_len);
3940         } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
3941                 ret = iw_cm_reject(id_priv->cm_id.iw,
3942                                    private_data, private_data_len);
3943         } else
3944                 ret = -ENOSYS;
3945
3946         return ret;
3947 }
3948 EXPORT_SYMBOL(rdma_reject);
3949
3950 int rdma_disconnect(struct rdma_cm_id *id)
3951 {
3952         struct rdma_id_private *id_priv;
3953         int ret;
3954
3955         id_priv = container_of(id, struct rdma_id_private, id);
3956         if (!id_priv->cm_id.ib)
3957                 return -EINVAL;
3958
3959         if (rdma_cap_ib_cm(id->device, id->port_num)) {
3960                 ret = cma_modify_qp_err(id_priv);
3961                 if (ret)
3962                         goto out;
3963                 /* Initiate or respond to a disconnect. */
3964                 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
3965                         ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
3966         } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
3967                 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
3968         } else
3969                 ret = -EINVAL;
3970
3971 out:
3972         return ret;
3973 }
3974 EXPORT_SYMBOL(rdma_disconnect);
3975
3976 static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
3977 {
3978         struct rdma_id_private *id_priv;
3979         struct cma_multicast *mc = multicast->context;
3980         struct rdma_cm_event event;
3981         int ret = 0;
3982
3983         id_priv = mc->id_priv;
3984         mutex_lock(&id_priv->handler_mutex);
3985         if (id_priv->state != RDMA_CM_ADDR_BOUND &&
3986             id_priv->state != RDMA_CM_ADDR_RESOLVED)
3987                 goto out;
3988
3989         if (!status)
3990                 status = cma_set_qkey(id_priv, be32_to_cpu(multicast->rec.qkey));
3991         mutex_lock(&id_priv->qp_mutex);
3992         if (!status && id_priv->id.qp)
3993                 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
3994                                          be16_to_cpu(multicast->rec.mlid));
3995         mutex_unlock(&id_priv->qp_mutex);
3996
3997         memset(&event, 0, sizeof event);
3998         event.status = status;
3999         event.param.ud.private_data = mc->context;
4000         if (!status) {
4001                 struct rdma_dev_addr *dev_addr =
4002                         &id_priv->id.route.addr.dev_addr;
4003                 struct net_device *ndev =
4004                         dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if);
4005                 enum ib_gid_type gid_type =
4006                         id_priv->cma_dev->default_gid_type[id_priv->id.port_num -
4007                         rdma_start_port(id_priv->cma_dev->device)];
4008
4009                 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
4010                 ret = ib_init_ah_from_mcmember(id_priv->id.device,
4011                                                id_priv->id.port_num,
4012                                                &multicast->rec,
4013                                                ndev, gid_type,
4014                                                &event.param.ud.ah_attr);
4015                 if (ret)
4016                         event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
4017
4018                 event.param.ud.qp_num = 0xFFFFFF;
4019                 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
4020                 if (ndev)
4021                         dev_put(ndev);
4022         } else
4023                 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
4024
4025         ret = id_priv->id.event_handler(&id_priv->id, &event);
4026         if (ret) {
4027                 cma_exch(id_priv, RDMA_CM_DESTROYING);
4028                 mutex_unlock(&id_priv->handler_mutex);
4029                 rdma_destroy_id(&id_priv->id);
4030                 return 0;
4031         }
4032
4033 out:
4034         mutex_unlock(&id_priv->handler_mutex);
4035         return 0;
4036 }
4037
4038 static void cma_set_mgid(struct rdma_id_private *id_priv,
4039                          struct sockaddr *addr, union ib_gid *mgid)
4040 {
4041         unsigned char mc_map[MAX_ADDR_LEN];
4042         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
4043         struct sockaddr_in *sin = (struct sockaddr_in *) addr;
4044         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
4045
4046         if (cma_any_addr(addr)) {
4047                 memset(mgid, 0, sizeof *mgid);
4048         } else if ((addr->sa_family == AF_INET6) &&
4049                    ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
4050                                                                  0xFF10A01B)) {
4051                 /* IPv6 address is an SA assigned MGID. */
4052                 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
4053         } else if (addr->sa_family == AF_IB) {
4054                 memcpy(mgid, &((struct sockaddr_ib *) addr)->sib_addr, sizeof *mgid);
4055         } else if (addr->sa_family == AF_INET6) {
4056                 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
4057                 if (id_priv->id.ps == RDMA_PS_UDP)
4058                         mc_map[7] = 0x01;       /* Use RDMA CM signature */
4059                 *mgid = *(union ib_gid *) (mc_map + 4);
4060         } else {
4061                 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
4062                 if (id_priv->id.ps == RDMA_PS_UDP)
4063                         mc_map[7] = 0x01;       /* Use RDMA CM signature */
4064                 *mgid = *(union ib_gid *) (mc_map + 4);
4065         }
4066 }
4067
4068 static void cma_query_sa_classport_info_cb(int status,
4069                                            struct ib_class_port_info *rec,
4070                                            void *context)
4071 {
4072         struct class_port_info_context *cb_ctx = context;
4073
4074         WARN_ON(!context);
4075
4076         if (status || !rec) {
4077                 pr_debug("RDMA CM: %s port %u failed query ClassPortInfo status: %d\n",
4078                          cb_ctx->device->name, cb_ctx->port_num, status);
4079                 goto out;
4080         }
4081
4082         memcpy(cb_ctx->class_port_info, rec, sizeof(struct ib_class_port_info));
4083
4084 out:
4085         complete(&cb_ctx->done);
4086 }
4087
4088 static int cma_query_sa_classport_info(struct ib_device *device, u8 port_num,
4089                                        struct ib_class_port_info *class_port_info)
4090 {
4091         struct class_port_info_context *cb_ctx;
4092         int ret;
4093
4094         cb_ctx = kmalloc(sizeof(*cb_ctx), GFP_KERNEL);
4095         if (!cb_ctx)
4096                 return -ENOMEM;
4097
4098         cb_ctx->device = device;
4099         cb_ctx->class_port_info = class_port_info;
4100         cb_ctx->port_num = port_num;
4101         init_completion(&cb_ctx->done);
4102
4103         ret = ib_sa_classport_info_rec_query(&sa_client, device, port_num,
4104                                              CMA_QUERY_CLASSPORT_INFO_TIMEOUT,
4105                                              GFP_KERNEL, cma_query_sa_classport_info_cb,
4106                                              cb_ctx, &cb_ctx->sa_query);
4107         if (ret < 0) {
4108                 pr_err("RDMA CM: %s port %u failed to send ClassPortInfo query, ret: %d\n",
4109                        device->name, port_num, ret);
4110                 goto out;
4111         }
4112
4113         wait_for_completion(&cb_ctx->done);
4114
4115 out:
4116         kfree(cb_ctx);
4117         return ret;
4118 }
4119
4120 static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
4121                                  struct cma_multicast *mc)
4122 {
4123         struct ib_sa_mcmember_rec rec;
4124         struct ib_class_port_info class_port_info;
4125         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
4126         ib_sa_comp_mask comp_mask;
4127         int ret;
4128
4129         ib_addr_get_mgid(dev_addr, &rec.mgid);
4130         ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
4131                                      &rec.mgid, &rec);
4132         if (ret)
4133                 return ret;
4134
4135         ret = cma_set_qkey(id_priv, 0);
4136         if (ret)
4137                 return ret;
4138
4139         cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
4140         rec.qkey = cpu_to_be32(id_priv->qkey);
4141         rdma_addr_get_sgid(dev_addr, &rec.port_gid);
4142         rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
4143         rec.join_state = mc->join_state;
4144
4145         if (rec.join_state == BIT(SENDONLY_FULLMEMBER_JOIN)) {
4146                 ret = cma_query_sa_classport_info(id_priv->id.device,
4147                                                   id_priv->id.port_num,
4148                                                   &class_port_info);
4149
4150                 if (ret)
4151                         return ret;
4152
4153                 if (!(ib_get_cpi_capmask2(&class_port_info) &
4154                       IB_SA_CAP_MASK2_SENDONLY_FULL_MEM_SUPPORT)) {
4155                         pr_warn("RDMA CM: %s port %u Unable to multicast join\n"
4156                                 "RDMA CM: SM doesn't support Send Only Full Member option\n",
4157                                 id_priv->id.device->name, id_priv->id.port_num);
4158                         return -EOPNOTSUPP;
4159                 }
4160         }
4161
4162         comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
4163                     IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
4164                     IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
4165                     IB_SA_MCMEMBER_REC_FLOW_LABEL |
4166                     IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
4167
4168         if (id_priv->id.ps == RDMA_PS_IPOIB)
4169                 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
4170                              IB_SA_MCMEMBER_REC_RATE_SELECTOR |
4171                              IB_SA_MCMEMBER_REC_MTU_SELECTOR |
4172                              IB_SA_MCMEMBER_REC_MTU |
4173                              IB_SA_MCMEMBER_REC_HOP_LIMIT;
4174
4175         mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
4176                                                 id_priv->id.port_num, &rec,
4177                                                 comp_mask, GFP_KERNEL,
4178                                                 cma_ib_mc_handler, mc);
4179         return PTR_ERR_OR_ZERO(mc->multicast.ib);
4180 }
4181
4182 static void iboe_mcast_work_handler(struct work_struct *work)
4183 {
4184         struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
4185         struct cma_multicast *mc = mw->mc;
4186         struct ib_sa_multicast *m = mc->multicast.ib;
4187
4188         mc->multicast.ib->context = mc;
4189         cma_ib_mc_handler(0, m);
4190         kref_put(&mc->mcref, release_mc);
4191         kfree(mw);
4192 }
4193
4194 static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid,
4195                               enum ib_gid_type gid_type)
4196 {
4197         struct sockaddr_in *sin = (struct sockaddr_in *)addr;
4198         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
4199
4200         if (cma_any_addr(addr)) {
4201                 memset(mgid, 0, sizeof *mgid);
4202         } else if (addr->sa_family == AF_INET6) {
4203                 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
4204         } else {
4205                 mgid->raw[0] =
4206                         (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) ? 0 : 0xff;
4207                 mgid->raw[1] =
4208                         (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) ? 0 : 0x0e;
4209                 mgid->raw[2] = 0;
4210                 mgid->raw[3] = 0;
4211                 mgid->raw[4] = 0;
4212                 mgid->raw[5] = 0;
4213                 mgid->raw[6] = 0;
4214                 mgid->raw[7] = 0;
4215                 mgid->raw[8] = 0;
4216                 mgid->raw[9] = 0;
4217                 mgid->raw[10] = 0xff;
4218                 mgid->raw[11] = 0xff;
4219                 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
4220         }
4221 }
4222
4223 static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
4224                                    struct cma_multicast *mc)
4225 {
4226         struct iboe_mcast_work *work;
4227         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
4228         int err = 0;
4229         struct sockaddr *addr = (struct sockaddr *)&mc->addr;
4230         struct net_device *ndev = NULL;
4231         enum ib_gid_type gid_type;
4232         bool send_only;
4233
4234         send_only = mc->join_state == BIT(SENDONLY_FULLMEMBER_JOIN);
4235
4236         if (cma_zero_addr((struct sockaddr *)&mc->addr))
4237                 return -EINVAL;
4238
4239         work = kzalloc(sizeof *work, GFP_KERNEL);
4240         if (!work)
4241                 return -ENOMEM;
4242
4243         mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
4244         if (!mc->multicast.ib) {
4245                 err = -ENOMEM;
4246                 goto out1;
4247         }
4248
4249         gid_type = id_priv->cma_dev->default_gid_type[id_priv->id.port_num -
4250                    rdma_start_port(id_priv->cma_dev->device)];
4251         cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid, gid_type);
4252
4253         mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
4254         if (id_priv->id.ps == RDMA_PS_UDP)
4255                 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
4256
4257         if (dev_addr->bound_dev_if)
4258                 ndev = dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if);
4259         if (!ndev) {
4260                 err = -ENODEV;
4261                 goto out2;
4262         }
4263         mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
4264         mc->multicast.ib->rec.hop_limit = 1;
4265         mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->if_mtu);
4266
4267         if (addr->sa_family == AF_INET || addr->sa_family == AF_INET6) {
4268                 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) {
4269                         mc->multicast.ib->rec.hop_limit = IPV6_DEFAULT_HOPLIMIT;
4270                         if (!send_only) {
4271                                 err = cma_igmp_send(ndev, &mc->multicast.ib->rec.mgid,
4272                                                     true);
4273                                 if (!err)
4274                                         mc->igmp_joined = true;
4275                         }
4276                 }
4277         } else {
4278                 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP)
4279                         err = -ENOTSUPP;
4280         }
4281         dev_put(ndev);
4282         if (err || !mc->multicast.ib->rec.mtu) {
4283                 if (!err)
4284                         err = -EINVAL;
4285                 goto out2;
4286         }
4287         rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
4288                     &mc->multicast.ib->rec.port_gid);
4289         work->id = id_priv;
4290         work->mc = mc;
4291         INIT_WORK(&work->work, iboe_mcast_work_handler);
4292         kref_get(&mc->mcref);
4293         queue_work(cma_wq, &work->work);
4294
4295         return 0;
4296
4297 out2:
4298         kfree(mc->multicast.ib);
4299 out1:
4300         kfree(work);
4301         return err;
4302 }
4303
4304 int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
4305                         u8 join_state, void *context)
4306 {
4307         struct rdma_id_private *id_priv;
4308         struct cma_multicast *mc;
4309         int ret;
4310
4311         if (!id->device)
4312                 return -EINVAL;
4313
4314         id_priv = container_of(id, struct rdma_id_private, id);
4315         if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) &&
4316             !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED))
4317                 return -EINVAL;
4318
4319         mc = kmalloc(sizeof *mc, GFP_KERNEL);
4320         if (!mc)
4321                 return -ENOMEM;
4322
4323         memcpy(&mc->addr, addr, rdma_addr_size(addr));
4324         mc->context = context;
4325         mc->id_priv = id_priv;
4326         mc->igmp_joined = false;
4327         mc->join_state = join_state;
4328         spin_lock(&id_priv->lock);
4329         list_add(&mc->list, &id_priv->mc_list);
4330         spin_unlock(&id_priv->lock);
4331
4332         if (rdma_protocol_roce(id->device, id->port_num)) {
4333                 kref_init(&mc->mcref);
4334                 ret = cma_iboe_join_multicast(id_priv, mc);
4335         } else if (rdma_cap_ib_mcast(id->device, id->port_num))
4336                 ret = cma_join_ib_multicast(id_priv, mc);
4337         else
4338                 ret = -ENOSYS;
4339
4340         if (ret) {
4341                 spin_lock_irq(&id_priv->lock);
4342                 list_del(&mc->list);
4343                 spin_unlock_irq(&id_priv->lock);
4344                 kfree(mc);
4345         }
4346         return ret;
4347 }
4348 EXPORT_SYMBOL(rdma_join_multicast);
4349
4350 void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
4351 {
4352         struct rdma_id_private *id_priv;
4353         struct cma_multicast *mc;
4354
4355         id_priv = container_of(id, struct rdma_id_private, id);
4356         spin_lock_irq(&id_priv->lock);
4357         list_for_each_entry(mc, &id_priv->mc_list, list) {
4358                 if (!memcmp(&mc->addr, addr, rdma_addr_size(addr))) {
4359                         list_del(&mc->list);
4360                         spin_unlock_irq(&id_priv->lock);
4361
4362                         if (id->qp)
4363                                 ib_detach_mcast(id->qp,
4364                                                 &mc->multicast.ib->rec.mgid,
4365                                                 be16_to_cpu(mc->multicast.ib->rec.mlid));
4366
4367                         BUG_ON(id_priv->cma_dev->device != id->device);
4368
4369                         if (rdma_cap_ib_mcast(id->device, id->port_num)) {
4370                                 ib_sa_free_multicast(mc->multicast.ib);
4371                                 kfree(mc);
4372                         } else if (rdma_protocol_roce(id->device, id->port_num)) {
4373                                 if (mc->igmp_joined) {
4374                                         struct rdma_dev_addr *dev_addr =
4375                                                 &id->route.addr.dev_addr;
4376                                         struct net_device *ndev = NULL;
4377
4378                                         if (dev_addr->bound_dev_if)
4379                                                 ndev = dev_get_by_index(dev_addr->net,
4380                                                                         dev_addr->bound_dev_if);
4381                                         if (ndev) {
4382                                                 cma_igmp_send(ndev,
4383                                                               &mc->multicast.ib->rec.mgid,
4384                                                               false);
4385                                                 dev_put(ndev);
4386                                         }
4387                                         mc->igmp_joined = false;
4388                                 }
4389                                 kref_put(&mc->mcref, release_mc);
4390                         }
4391                         return;
4392                 }
4393         }
4394         spin_unlock_irq(&id_priv->lock);
4395 }
4396 EXPORT_SYMBOL(rdma_leave_multicast);
4397
4398 static int
4399 sysctl_cma_default_roce_mode(SYSCTL_HANDLER_ARGS)
4400 {
4401         struct cma_device *cma_dev = arg1;
4402         const int port = arg2;
4403         char buf[64];
4404         int error;
4405
4406         strlcpy(buf, ib_cache_gid_type_str(
4407             cma_get_default_gid_type(cma_dev, port)), sizeof(buf));
4408
4409         error = sysctl_handle_string(oidp, buf, sizeof(buf), req);
4410         if (error != 0 || req->newptr == NULL)
4411                 goto done;
4412
4413         error = ib_cache_gid_parse_type_str(buf);
4414         if (error < 0) {
4415                 error = EINVAL;
4416                 goto done;
4417         }
4418
4419         cma_set_default_gid_type(cma_dev, port, error);
4420         error = 0;
4421 done:
4422         return (error);
4423 }
4424
4425 static void cma_add_one(struct ib_device *device)
4426 {
4427         struct cma_device *cma_dev;
4428         struct rdma_id_private *id_priv;
4429         unsigned int i;
4430
4431         cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
4432         if (!cma_dev)
4433                 return;
4434
4435         sysctl_ctx_init(&cma_dev->sysctl_ctx);
4436
4437         cma_dev->device = device;
4438         cma_dev->default_gid_type = kcalloc(device->phys_port_cnt,
4439                                             sizeof(*cma_dev->default_gid_type),
4440                                             GFP_KERNEL);
4441         if (!cma_dev->default_gid_type) {
4442                 kfree(cma_dev);
4443                 return;
4444         }
4445         for (i = rdma_start_port(device); i <= rdma_end_port(device); i++) {
4446                 unsigned long supported_gids;
4447                 unsigned int default_gid_type;
4448
4449                 supported_gids = roce_gid_type_mask_support(device, i);
4450
4451                 if (WARN_ON(!supported_gids)) {
4452                         /* set something valid */
4453                         default_gid_type = 0;
4454                 } else if (test_bit(IB_GID_TYPE_ROCE_UDP_ENCAP, &supported_gids)) {
4455                         /* prefer RoCEv2, if supported */
4456                         default_gid_type = IB_GID_TYPE_ROCE_UDP_ENCAP;
4457                 } else {
4458                         default_gid_type = find_first_bit(&supported_gids,
4459                             BITS_PER_LONG);
4460                 }
4461                 cma_dev->default_gid_type[i - rdma_start_port(device)] =
4462                     default_gid_type;
4463         }
4464
4465         init_completion(&cma_dev->comp);
4466         atomic_set(&cma_dev->refcount, 1);
4467         INIT_LIST_HEAD(&cma_dev->id_list);
4468         ib_set_client_data(device, &cma_client, cma_dev);
4469
4470         mutex_lock(&lock);
4471         list_add_tail(&cma_dev->list, &dev_list);
4472         list_for_each_entry(id_priv, &listen_any_list, list)
4473                 cma_listen_on_dev(id_priv, cma_dev);
4474         mutex_unlock(&lock);
4475
4476         for (i = rdma_start_port(device); i <= rdma_end_port(device); i++) {
4477                 char buf[64];
4478
4479                 snprintf(buf, sizeof(buf), "default_roce_mode_port%d", i);
4480
4481                 (void) SYSCTL_ADD_PROC(&cma_dev->sysctl_ctx,
4482                     SYSCTL_CHILDREN(device->ports_parent->parent->oidp),
4483                     OID_AUTO, buf, CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE,
4484                     cma_dev, i, &sysctl_cma_default_roce_mode, "A",
4485                     "Default RoCE mode. Valid values: IB/RoCE v1 and RoCE v2");
4486         }
4487 }
4488
4489 static int cma_remove_id_dev(struct rdma_id_private *id_priv)
4490 {
4491         struct rdma_cm_event event;
4492         enum rdma_cm_state state;
4493         int ret = 0;
4494
4495         /* Record that we want to remove the device */
4496         state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL);
4497         if (state == RDMA_CM_DESTROYING)
4498                 return 0;
4499
4500         cma_cancel_operation(id_priv, state);
4501         mutex_lock(&id_priv->handler_mutex);
4502
4503         /* Check for destruction from another callback. */
4504         if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL))
4505                 goto out;
4506
4507         memset(&event, 0, sizeof event);
4508         event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
4509         ret = id_priv->id.event_handler(&id_priv->id, &event);
4510 out:
4511         mutex_unlock(&id_priv->handler_mutex);
4512         return ret;
4513 }
4514
4515 static void cma_process_remove(struct cma_device *cma_dev)
4516 {
4517         struct rdma_id_private *id_priv;
4518         int ret;
4519
4520         mutex_lock(&lock);
4521         while (!list_empty(&cma_dev->id_list)) {
4522                 id_priv = list_entry(cma_dev->id_list.next,
4523                                      struct rdma_id_private, list);
4524
4525                 list_del(&id_priv->listen_list);
4526                 list_del_init(&id_priv->list);
4527                 atomic_inc(&id_priv->refcount);
4528                 mutex_unlock(&lock);
4529
4530                 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
4531                 cma_deref_id(id_priv);
4532                 if (ret)
4533                         rdma_destroy_id(&id_priv->id);
4534
4535                 mutex_lock(&lock);
4536         }
4537         mutex_unlock(&lock);
4538
4539         cma_deref_dev(cma_dev);
4540         wait_for_completion(&cma_dev->comp);
4541 }
4542
4543 static void cma_remove_one(struct ib_device *device, void *client_data)
4544 {
4545         struct cma_device *cma_dev = client_data;
4546
4547         if (!cma_dev)
4548                 return;
4549
4550         mutex_lock(&lock);
4551         list_del(&cma_dev->list);
4552         mutex_unlock(&lock);
4553
4554         cma_process_remove(cma_dev);
4555         sysctl_ctx_free(&cma_dev->sysctl_ctx);
4556         kfree(cma_dev->default_gid_type);
4557         kfree(cma_dev);
4558 }
4559
4560 static void cma_init_vnet(void *arg)
4561 {
4562         struct cma_pernet *pernet = &VNET(cma_pernet);
4563
4564         idr_init(&pernet->tcp_ps);
4565         idr_init(&pernet->udp_ps);
4566         idr_init(&pernet->ipoib_ps);
4567         idr_init(&pernet->ib_ps);
4568         idr_init(&pernet->sdp_ps);
4569 }
4570 VNET_SYSINIT(cma_init_vnet, SI_SUB_OFED_MODINIT - 1, SI_ORDER_FIRST, cma_init_vnet, NULL);
4571
4572 static void cma_destroy_vnet(void *arg)
4573 {
4574         struct cma_pernet *pernet = &VNET(cma_pernet);
4575
4576         idr_destroy(&pernet->tcp_ps);
4577         idr_destroy(&pernet->udp_ps);
4578         idr_destroy(&pernet->ipoib_ps);
4579         idr_destroy(&pernet->ib_ps);
4580         idr_destroy(&pernet->sdp_ps);
4581 }
4582 VNET_SYSUNINIT(cma_destroy_vnet, SI_SUB_OFED_MODINIT - 1, SI_ORDER_SECOND, cma_destroy_vnet, NULL);
4583
4584 static int __init cma_init(void)
4585 {
4586         int ret;
4587
4588         cma_wq = alloc_ordered_workqueue("rdma_cm", WQ_MEM_RECLAIM);
4589         if (!cma_wq)
4590                 return -ENOMEM;
4591
4592         ib_sa_register_client(&sa_client);
4593         rdma_addr_register_client(&addr_client);
4594
4595         ret = ib_register_client(&cma_client);
4596         if (ret)
4597                 goto err;
4598
4599         cma_configfs_init();
4600
4601         return 0;
4602
4603 err:
4604         rdma_addr_unregister_client(&addr_client);
4605         ib_sa_unregister_client(&sa_client);
4606         destroy_workqueue(cma_wq);
4607         return ret;
4608 }
4609
4610 static void __exit cma_cleanup(void)
4611 {
4612         cma_configfs_exit();
4613         ib_unregister_client(&cma_client);
4614         rdma_addr_unregister_client(&addr_client);
4615         ib_sa_unregister_client(&sa_client);
4616         destroy_workqueue(cma_wq);
4617 }
4618
4619 module_init_order(cma_init, SI_ORDER_FOURTH);
4620 module_exit_order(cma_cleanup, SI_ORDER_FOURTH);