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  * $FreeBSD$
  38  */
  39
  40 #define LINUXKPI_PARAM_PREFIX ibcore_
  41
  42 #include <linux/completion.h>
  43 #include <linux/in.h>
  44 #include <linux/in6.h>
  45 #include <linux/mutex.h>
  46 #include <linux/random.h>
  47 #include <linux/idr.h>
  48 #include <linux/inetdevice.h>
  49 #include <linux/slab.h>
  50 #include <linux/module.h>
  51 #include <net/route.h>
  52
  53 #include <net/tcp.h>
  54 #include <net/ipv6.h>
  55
  56 #include <netinet6/scope6_var.h>
  57 #include <netinet6/ip6_var.h>
  58
  59 #include <rdma/rdma_cm.h>
  60 #include <rdma/rdma_cm_ib.h>
  61 #include <rdma/ib.h>
  62 #include <rdma/ib_addr.h>
  63 #include <rdma/ib_cache.h>
  64 #include <rdma/ib_cm.h>
  65 #include <rdma/ib_sa.h>
  66 #include <rdma/iw_cm.h>
  67
  68 #include <sys/priv.h>
  69
  70 #include "core_priv.h"
  71
  72 MODULE_AUTHOR("Sean Hefty");
  73 MODULE_DESCRIPTION("Generic RDMA CM Agent");
  74 MODULE_LICENSE("Dual BSD/GPL");
  75
  76 #define CMA_CM_RESPONSE_TIMEOUT 20
  77 #define CMA_QUERY_CLASSPORT_INFO_TIMEOUT 3000
  78 #define CMA_MAX_CM_RETRIES 15
  79 #define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
  80 #define CMA_IBOE_PACKET_LIFETIME 18
  81
  82 static const char * const cma_events[] = {
  83         [RDMA_CM_EVENT_ADDR_RESOLVED]    = "address resolved",
  84         [RDMA_CM_EVENT_ADDR_ERROR]       = "address error",
  85         [RDMA_CM_EVENT_ROUTE_RESOLVED]   = "route resolved ",
  86         [RDMA_CM_EVENT_ROUTE_ERROR]      = "route error",
  87         [RDMA_CM_EVENT_CONNECT_REQUEST]  = "connect request",
  88         [RDMA_CM_EVENT_CONNECT_RESPONSE] = "connect response",
  89         [RDMA_CM_EVENT_CONNECT_ERROR]    = "connect error",
  90         [RDMA_CM_EVENT_UNREACHABLE]      = "unreachable",
  91         [RDMA_CM_EVENT_REJECTED]         = "rejected",
  92         [RDMA_CM_EVENT_ESTABLISHED]      = "established",
  93         [RDMA_CM_EVENT_DISCONNECTED]     = "disconnected",
  94         [RDMA_CM_EVENT_DEVICE_REMOVAL]   = "device removal",
  95         [RDMA_CM_EVENT_MULTICAST_JOIN]   = "multicast join",
  96         [RDMA_CM_EVENT_MULTICAST_ERROR]  = "multicast error",
  97         [RDMA_CM_EVENT_ADDR_CHANGE]      = "address change",
  98         [RDMA_CM_EVENT_TIMEWAIT_EXIT]    = "timewait exit",
  99 };
 100
 101 const char *__attribute_const__ rdma_event_msg(enum rdma_cm_event_type event)
 102 {
 103         size_t index = event;
 104
 105         return (index < ARRAY_SIZE(cma_events) && cma_events[index]) ?
 106                         cma_events[index] : "unrecognized event";
 107 }
 108 EXPORT_SYMBOL(rdma_event_msg);
 109
 110 static int cma_check_linklocal(struct rdma_dev_addr *, struct sockaddr *);
 111 static void cma_add_one(struct ib_device *device);
 112 static void cma_remove_one(struct ib_device *device, void *client_data);
 113
 114 static struct ib_client cma_client = {
 115         .name   = "cma",
 116         .add    = cma_add_one,
 117         .remove = cma_remove_one
 118 };
 119
 120 static struct ib_sa_client sa_client;
 121 static struct rdma_addr_client addr_client;
 122 static LIST_HEAD(dev_list);
 123 static LIST_HEAD(listen_any_list);
 124 static DEFINE_MUTEX(lock);
 125 static struct workqueue_struct *cma_wq;
 126
 127 struct cma_pernet {
 128         struct idr tcp_ps;
 129         struct idr udp_ps;
 130         struct idr ipoib_ps;
 131         struct idr ib_ps;
 132 };
 133
 134 VNET_DEFINE(struct cma_pernet, cma_pernet);
 135
 136 static struct cma_pernet *cma_pernet_ptr(struct vnet *vnet)
 137 {
 138         struct cma_pernet *retval;
 139
 140         CURVNET_SET_QUIET(vnet);
 141         retval = &VNET(cma_pernet);
 142         CURVNET_RESTORE();
 143
 144         return (retval);
 145 }
 146
 147 static struct idr *cma_pernet_idr(struct vnet *net, enum rdma_port_space ps)
 148 {
 149         struct cma_pernet *pernet = cma_pernet_ptr(net);
 150
 151         switch (ps) {
 152         case RDMA_PS_TCP:
 153                 return &pernet->tcp_ps;
 154         case RDMA_PS_UDP:
 155                 return &pernet->udp_ps;
 156         case RDMA_PS_IPOIB:
 157                 return &pernet->ipoib_ps;
 158         case RDMA_PS_IB:
 159                 return &pernet->ib_ps;
 160         default:
 161                 return NULL;
 162         }
 163 }
 164
 165 struct cma_device {
 166         struct list_head        list;
 167         struct ib_device        *device;
 168         struct completion       comp;
 169         atomic_t                refcount;
 170         struct list_head        id_list;
 171         struct sysctl_ctx_list  sysctl_ctx;
 172         enum ib_gid_type        *default_gid_type;
 173 };
 174
 175 struct rdma_bind_list {
 176         enum rdma_port_space    ps;
 177         struct hlist_head       owners;
 178         unsigned short          port;
 179 };
 180
 181 struct class_port_info_context {
 182         struct ib_class_port_info       *class_port_info;
 183         struct ib_device                *device;
 184         struct completion               done;
 185         struct ib_sa_query              *sa_query;
 186         u8                              port_num;
 187 };
 188
 189 static int cma_ps_alloc(struct vnet *vnet, enum rdma_port_space ps,
 190                         struct rdma_bind_list *bind_list, int snum)
 191 {
 192         struct idr *idr = cma_pernet_idr(vnet, ps);
 193
 194         return idr_alloc(idr, bind_list, snum, snum + 1, GFP_KERNEL);
 195 }
 196
 197 static struct rdma_bind_list *cma_ps_find(struct vnet *net,
 198                                           enum rdma_port_space ps, int snum)
 199 {
 200         struct idr *idr = cma_pernet_idr(net, ps);
 201
 202         return idr_find(idr, snum);
 203 }
 204
 205 static void cma_ps_remove(struct vnet *net, enum rdma_port_space ps, int snum)
 206 {
 207         struct idr *idr = cma_pernet_idr(net, ps);
 208
 209         idr_remove(idr, snum);
 210 }
 211
 212 enum {
 213         CMA_OPTION_AFONLY,
 214 };
 215
 216 void cma_ref_dev(struct cma_device *cma_dev)
 217 {
 218         atomic_inc(&cma_dev->refcount);
 219 }
 220
 221 struct cma_device *cma_enum_devices_by_ibdev(cma_device_filter  filter,
 222                                              void               *cookie)
 223 {
 224         struct cma_device *cma_dev;
 225         struct cma_device *found_cma_dev = NULL;
 226
 227         mutex_lock(&lock);
 228
 229         list_for_each_entry(cma_dev, &dev_list, list)
 230                 if (filter(cma_dev->device, cookie)) {
 231                         found_cma_dev = cma_dev;
 232                         break;
 233                 }
 234
 235         if (found_cma_dev)
 236                 cma_ref_dev(found_cma_dev);
 237         mutex_unlock(&lock);
 238         return found_cma_dev;
 239 }
 240
 241 int cma_get_default_gid_type(struct cma_device *cma_dev,
 242                              unsigned int port)
 243 {
 244         if (port < rdma_start_port(cma_dev->device) ||
 245             port > rdma_end_port(cma_dev->device))
 246                 return -EINVAL;
 247
 248         return cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)];
 249 }
 250
 251 int cma_set_default_gid_type(struct cma_device *cma_dev,
 252                              unsigned int port,
 253                              enum ib_gid_type default_gid_type)
 254 {
 255         unsigned long supported_gids;
 256
 257         if (port < rdma_start_port(cma_dev->device) ||
 258             port > rdma_end_port(cma_dev->device))
 259                 return -EINVAL;
 260
 261         supported_gids = roce_gid_type_mask_support(cma_dev->device, port);
 262
 263         if (!(supported_gids & 1 << default_gid_type))
 264                 return -EINVAL;
 265
 266         cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)] =
 267                 default_gid_type;
 268
 269         return 0;
 270 }
 271
 272 struct ib_device *cma_get_ib_dev(struct cma_device *cma_dev)
 273 {
 274         return cma_dev->device;
 275 }
 276
 277 /*
 278  * Device removal can occur at anytime, so we need extra handling to
 279  * serialize notifying the user of device removal with other callbacks.
 280  * We do this by disabling removal notification while a callback is in process,
 281  * and reporting it after the callback completes.
 282  */
 283 struct rdma_id_private {
 284         struct rdma_cm_id       id;
 285
 286         struct rdma_bind_list   *bind_list;
 287         struct hlist_node       node;
 288         struct list_head        list; /* listen_any_list or cma_device.list */
 289         struct list_head        listen_list; /* per device listens */
 290         struct cma_device       *cma_dev;
 291         struct list_head        mc_list;
 292
 293         int                     internal_id;
 294         enum rdma_cm_state      state;
 295         spinlock_t              lock;
 296         struct mutex            qp_mutex;
 297
 298         struct completion       comp;
 299         atomic_t                refcount;
 300         struct mutex            handler_mutex;
 301
 302         int                     backlog;
 303         int                     timeout_ms;
 304         struct ib_sa_query      *query;
 305         int                     query_id;
 306         union {
 307                 struct ib_cm_id *ib;
 308                 struct iw_cm_id *iw;
 309         } cm_id;
 310
 311         u32                     seq_num;
 312         u32                     qkey;
 313         u32                     qp_num;
 314         pid_t                   owner;
 315         u32                     options;
 316         u8                      srq;
 317         u8                      tos;
 318         u8                      reuseaddr;
 319         u8                      afonly;
 320         enum ib_gid_type        gid_type;
 321 };
 322
 323 struct cma_multicast {
 324         struct rdma_id_private *id_priv;
 325         union {
 326                 struct ib_sa_multicast *ib;
 327         } multicast;
 328         struct list_head        list;
 329         void                    *context;
 330         struct sockaddr_storage addr;
 331         struct kref             mcref;
 332         bool                    igmp_joined;
 333         u8                      join_state;
 334 };
 335
 336 struct cma_work {
 337         struct work_struct      work;
 338         struct rdma_id_private  *id;
 339         enum rdma_cm_state      old_state;
 340         enum rdma_cm_state      new_state;
 341         struct rdma_cm_event    event;
 342 };
 343
 344 struct cma_ndev_work {
 345         struct work_struct      work;
 346         struct rdma_id_private  *id;
 347         struct rdma_cm_event    event;
 348 };
 349
 350 struct iboe_mcast_work {
 351         struct work_struct       work;
 352         struct rdma_id_private  *id;
 353         struct cma_multicast    *mc;
 354 };
 355
 356 union cma_ip_addr {
 357         struct in6_addr ip6;
 358         struct {
 359                 __be32 pad[3];
 360                 __be32 addr;
 361         } ip4;
 362 };
 363
 364 struct cma_hdr {
 365         u8 cma_version;
 366         u8 ip_version;  /* IP version: 7:4 */
 367         __be16 port;
 368         union cma_ip_addr src_addr;
 369         union cma_ip_addr dst_addr;
 370 };
 371
 372 #define CMA_VERSION 0x00
 373
 374 struct cma_req_info {
 375         struct ib_device *device;
 376         int port;
 377         union ib_gid local_gid;
 378         __be64 service_id;
 379         u16 pkey;
 380         bool has_gid:1;
 381 };
 382
 383 static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp)
 384 {
 385         unsigned long flags;
 386         int ret;
 387
 388         spin_lock_irqsave(&id_priv->lock, flags);
 389         ret = (id_priv->state == comp);
 390         spin_unlock_irqrestore(&id_priv->lock, flags);
 391         return ret;
 392 }
 393
 394 static int cma_comp_exch(struct rdma_id_private *id_priv,
 395                          enum rdma_cm_state comp, enum rdma_cm_state exch)
 396 {
 397         unsigned long flags;
 398         int ret;
 399
 400         spin_lock_irqsave(&id_priv->lock, flags);
 401         if ((ret = (id_priv->state == comp)))
 402                 id_priv->state = exch;
 403         spin_unlock_irqrestore(&id_priv->lock, flags);
 404         return ret;
 405 }
 406
 407 static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv,
 408                                    enum rdma_cm_state exch)
 409 {
 410         unsigned long flags;
 411         enum rdma_cm_state old;
 412
 413         spin_lock_irqsave(&id_priv->lock, flags);
 414         old = id_priv->state;
 415         id_priv->state = exch;
 416         spin_unlock_irqrestore(&id_priv->lock, flags);
 417         return old;
 418 }
 419
 420 static inline u8 cma_get_ip_ver(const struct cma_hdr *hdr)
 421 {
 422         return hdr->ip_version >> 4;
 423 }
 424
 425 static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
 426 {
 427         hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
 428 }
 429
 430 static void _cma_attach_to_dev(struct rdma_id_private *id_priv,
 431                                struct cma_device *cma_dev)
 432 {
 433         cma_ref_dev(cma_dev);
 434         id_priv->cma_dev = cma_dev;
 435         id_priv->gid_type = 0;
 436         id_priv->id.device = cma_dev->device;
 437         id_priv->id.route.addr.dev_addr.transport =
 438                 rdma_node_get_transport(cma_dev->device->node_type);
 439         list_add_tail(&id_priv->list, &cma_dev->id_list);
 440 }
 441
 442 static void cma_attach_to_dev(struct rdma_id_private *id_priv,
 443                               struct cma_device *cma_dev)
 444 {
 445         _cma_attach_to_dev(id_priv, cma_dev);
 446         id_priv->gid_type =
 447                 cma_dev->default_gid_type[id_priv->id.port_num -
 448                                           rdma_start_port(cma_dev->device)];
 449 }
 450
 451 void cma_deref_dev(struct cma_device *cma_dev)
 452 {
 453         if (atomic_dec_and_test(&cma_dev->refcount))
 454                 complete(&cma_dev->comp);
 455 }
 456
 457 static inline void release_mc(struct kref *kref)
 458 {
 459         struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);
 460
 461         kfree(mc->multicast.ib);
 462         kfree(mc);
 463 }
 464
 465 static void cma_release_dev(struct rdma_id_private *id_priv)
 466 {
 467         mutex_lock(&lock);
 468         list_del(&id_priv->list);
 469         cma_deref_dev(id_priv->cma_dev);
 470         id_priv->cma_dev = NULL;
 471         mutex_unlock(&lock);
 472 }
 473
 474 static inline struct sockaddr *cma_src_addr(struct rdma_id_private *id_priv)
 475 {
 476         return (struct sockaddr *) &id_priv->id.route.addr.src_addr;
 477 }
 478
 479 static inline struct sockaddr *cma_dst_addr(struct rdma_id_private *id_priv)
 480 {
 481         return (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
 482 }
 483
 484 static inline unsigned short cma_family(struct rdma_id_private *id_priv)
 485 {
 486         return id_priv->id.route.addr.src_addr.ss_family;
 487 }
 488
 489 static int cma_set_qkey(struct rdma_id_private *id_priv, u32 qkey)
 490 {
 491         struct ib_sa_mcmember_rec rec;
 492         int ret = 0;
 493
 494         if (id_priv->qkey) {
 495                 if (qkey && id_priv->qkey != qkey)
 496                         return -EINVAL;
 497                 return 0;
 498         }
 499
 500         if (qkey) {
 501                 id_priv->qkey = qkey;
 502                 return 0;
 503         }
 504
 505         switch (id_priv->id.ps) {
 506         case RDMA_PS_UDP:
 507         case RDMA_PS_IB:
 508                 id_priv->qkey = RDMA_UDP_QKEY;
 509                 break;
 510         case RDMA_PS_IPOIB:
 511                 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
 512                 ret = ib_sa_get_mcmember_rec(id_priv->id.device,
 513                                              id_priv->id.port_num, &rec.mgid,
 514                                              &rec);
 515                 if (!ret)
 516                         id_priv->qkey = be32_to_cpu(rec.qkey);
 517                 break;
 518         default:
 519                 break;
 520         }
 521         return ret;
 522 }
 523
 524 static void cma_translate_ib(struct sockaddr_ib *sib, struct rdma_dev_addr *dev_addr)
 525 {
 526         dev_addr->dev_type = ARPHRD_INFINIBAND;
 527         rdma_addr_set_sgid(dev_addr, (union ib_gid *) &sib->sib_addr);
 528         ib_addr_set_pkey(dev_addr, ntohs(sib->sib_pkey));
 529 }
 530
 531 static int cma_translate_addr(struct sockaddr *addr, struct rdma_dev_addr *dev_addr)
 532 {
 533         int ret;
 534
 535         if (addr->sa_family != AF_IB) {
 536                 ret = rdma_translate_ip(addr, dev_addr);
 537         } else {
 538                 cma_translate_ib((struct sockaddr_ib *) addr, dev_addr);
 539                 ret = 0;
 540         }
 541
 542         return ret;
 543 }
 544
 545 static inline int cma_validate_port(struct ib_device *device, u8 port,
 546                                     enum ib_gid_type gid_type,
 547                                       union ib_gid *gid, int dev_type,
 548                                       struct vnet *net,
 549                                       int bound_if_index)
 550 {
 551         int ret = -ENODEV;
 552         struct net_device *ndev = NULL;
 553
 554         if ((dev_type == ARPHRD_INFINIBAND) && !rdma_protocol_ib(device, port))
 555                 return ret;
 556
 557         if ((dev_type != ARPHRD_INFINIBAND) && rdma_protocol_ib(device, port))
 558                 return ret;
 559
 560         if (dev_type == ARPHRD_ETHER && rdma_protocol_roce(device, port)) {
 561                 ndev = dev_get_by_index(net, bound_if_index);
 562                 if (ndev && ndev->if_flags & IFF_LOOPBACK) {
 563                         pr_info("detected loopback device\n");
 564                         dev_put(ndev);
 565
 566                         if (!device->get_netdev)
 567                                 return -EOPNOTSUPP;
 568
 569                         ndev = device->get_netdev(device, port);
 570                         if (!ndev)
 571                                 return -ENODEV;
 572                 }
 573         } else {
 574                 gid_type = IB_GID_TYPE_IB;
 575         }
 576
 577         ret = ib_find_cached_gid_by_port(device, gid, gid_type, port,
 578                                          ndev, NULL);
 579
 580         if (ndev)
 581                 dev_put(ndev);
 582
 583         return ret;
 584 }
 585
 586 static int cma_acquire_dev(struct rdma_id_private *id_priv,
 587                            struct rdma_id_private *listen_id_priv)
 588 {
 589         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
 590         struct cma_device *cma_dev;
 591         union ib_gid gid, iboe_gid, *gidp;
 592         int ret = -ENODEV;
 593         u8 port;
 594
 595         if (dev_addr->dev_type != ARPHRD_INFINIBAND &&
 596             id_priv->id.ps == RDMA_PS_IPOIB)
 597                 return -EINVAL;
 598
 599         mutex_lock(&lock);
 600         rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
 601                     &iboe_gid);
 602
 603         memcpy(&gid, dev_addr->src_dev_addr +
 604                rdma_addr_gid_offset(dev_addr), sizeof gid);
 605
 606         if (listen_id_priv) {
 607                 cma_dev = listen_id_priv->cma_dev;
 608                 port = listen_id_priv->id.port_num;
 609                 gidp = rdma_protocol_roce(cma_dev->device, port) ?
 610                        &iboe_gid : &gid;
 611
 612                 ret = cma_validate_port(cma_dev->device, port,
 613                                         rdma_protocol_ib(cma_dev->device, port) ?
 614                                         IB_GID_TYPE_IB :
 615                                         listen_id_priv->gid_type, gidp,
 616                                         dev_addr->dev_type,
 617                                         dev_addr->net,
 618                                         dev_addr->bound_dev_if);
 619                 if (!ret) {
 620                         id_priv->id.port_num = port;
 621                         goto out;
 622                 }
 623         }
 624
 625         list_for_each_entry(cma_dev, &dev_list, list) {
 626                 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
 627                         if (listen_id_priv &&
 628                             listen_id_priv->cma_dev == cma_dev &&
 629                             listen_id_priv->id.port_num == port)
 630                                 continue;
 631
 632                         gidp = rdma_protocol_roce(cma_dev->device, port) ?
 633                                &iboe_gid : &gid;
 634
 635                         ret = cma_validate_port(cma_dev->device, port,
 636                                                 rdma_protocol_ib(cma_dev->device, port) ?
 637                                                 IB_GID_TYPE_IB :
 638                                                 cma_dev->default_gid_type[port - 1],
 639                                                 gidp, dev_addr->dev_type,
 640                                                 dev_addr->net,
 641                                                 dev_addr->bound_dev_if);
 642                         if (!ret) {
 643                                 id_priv->id.port_num = port;
 644                                 goto out;
 645                         }
 646                 }
 647         }
 648
 649 out:
 650         if (!ret)
 651                 cma_attach_to_dev(id_priv, cma_dev);
 652
 653         mutex_unlock(&lock);
 654         return ret;
 655 }
 656
 657 /*
 658  * Select the source IB device and address to reach the destination IB address.
 659  */
 660 static int cma_resolve_ib_dev(struct rdma_id_private *id_priv)
 661 {
 662         struct cma_device *cma_dev, *cur_dev;
 663         struct sockaddr_ib *addr;
 664         union ib_gid gid, sgid, *dgid;
 665         u16 pkey, index;
 666         u8 p;
 667         int i;
 668
 669         cma_dev = NULL;
 670         addr = (struct sockaddr_ib *) cma_dst_addr(id_priv);
 671         dgid = (union ib_gid *) &addr->sib_addr;
 672         pkey = ntohs(addr->sib_pkey);
 673
 674         list_for_each_entry(cur_dev, &dev_list, list) {
 675                 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
 676                         if (!rdma_cap_af_ib(cur_dev->device, p))
 677                                 continue;
 678
 679                         if (ib_find_cached_pkey(cur_dev->device, p, pkey, &index))
 680                                 continue;
 681
 682                         for (i = 0; !ib_get_cached_gid(cur_dev->device, p, i,
 683                                                        &gid, NULL);
 684                              i++) {
 685                                 if (!memcmp(&gid, dgid, sizeof(gid))) {
 686                                         cma_dev = cur_dev;
 687                                         sgid = gid;
 688                                         id_priv->id.port_num = p;
 689                                         goto found;
 690                                 }
 691
 692                                 if (!cma_dev && (gid.global.subnet_prefix ==
 693                                                  dgid->global.subnet_prefix)) {
 694                                         cma_dev = cur_dev;
 695                                         sgid = gid;
 696                                         id_priv->id.port_num = p;
 697                                 }
 698                         }
 699                 }
 700         }
 701
 702         if (!cma_dev)
 703                 return -ENODEV;
 704
 705 found:
 706         cma_attach_to_dev(id_priv, cma_dev);
 707         addr = (struct sockaddr_ib *) cma_src_addr(id_priv);
 708         memcpy(&addr->sib_addr, &sgid, sizeof sgid);
 709         cma_translate_ib(addr, &id_priv->id.route.addr.dev_addr);
 710         return 0;
 711 }
 712
 713 static void cma_deref_id(struct rdma_id_private *id_priv)
 714 {
 715         if (atomic_dec_and_test(&id_priv->refcount))
 716                 complete(&id_priv->comp);
 717 }
 718
 719 struct rdma_cm_id *rdma_create_id(struct vnet *net,
 720                                   rdma_cm_event_handler event_handler,
 721                                   void *context, enum rdma_port_space ps,
 722                                   enum ib_qp_type qp_type)
 723 {
 724         struct rdma_id_private *id_priv;
 725
 726         id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
 727         if (!id_priv)
 728                 return ERR_PTR(-ENOMEM);
 729
 730         id_priv->owner = task_pid_nr(current);
 731         id_priv->state = RDMA_CM_IDLE;
 732         id_priv->id.context = context;
 733         id_priv->id.event_handler = event_handler;
 734         id_priv->id.ps = ps;
 735         id_priv->id.qp_type = qp_type;
 736         spin_lock_init(&id_priv->lock);
 737         mutex_init(&id_priv->qp_mutex);
 738         init_completion(&id_priv->comp);
 739         atomic_set(&id_priv->refcount, 1);
 740         mutex_init(&id_priv->handler_mutex);
 741         INIT_LIST_HEAD(&id_priv->listen_list);
 742         INIT_LIST_HEAD(&id_priv->mc_list);
 743         get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
 744         id_priv->id.route.addr.dev_addr.net = TD_TO_VNET(curthread);
 745
 746         return &id_priv->id;
 747 }
 748 EXPORT_SYMBOL(rdma_create_id);
 749
 750 static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
 751 {
 752         struct ib_qp_attr qp_attr;
 753         int qp_attr_mask, ret;
 754
 755         qp_attr.qp_state = IB_QPS_INIT;
 756         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 757         if (ret)
 758                 return ret;
 759
 760         ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
 761         if (ret)
 762                 return ret;
 763
 764         qp_attr.qp_state = IB_QPS_RTR;
 765         ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
 766         if (ret)
 767                 return ret;
 768
 769         qp_attr.qp_state = IB_QPS_RTS;
 770         qp_attr.sq_psn = 0;
 771         ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
 772
 773         return ret;
 774 }
 775
 776 static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
 777 {
 778         struct ib_qp_attr qp_attr;
 779         int qp_attr_mask, ret;
 780
 781         qp_attr.qp_state = IB_QPS_INIT;
 782         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 783         if (ret)
 784                 return ret;
 785
 786         return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
 787 }
 788
 789 int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
 790                    struct ib_qp_init_attr *qp_init_attr)
 791 {
 792         struct rdma_id_private *id_priv;
 793         struct ib_qp *qp;
 794         int ret;
 795
 796         id_priv = container_of(id, struct rdma_id_private, id);
 797         if (id->device != pd->device)
 798                 return -EINVAL;
 799
 800         qp_init_attr->port_num = id->port_num;
 801         qp = ib_create_qp(pd, qp_init_attr);
 802         if (IS_ERR(qp))
 803                 return PTR_ERR(qp);
 804
 805         if (id->qp_type == IB_QPT_UD)
 806                 ret = cma_init_ud_qp(id_priv, qp);
 807         else
 808                 ret = cma_init_conn_qp(id_priv, qp);
 809         if (ret)
 810                 goto err;
 811
 812         id->qp = qp;
 813         id_priv->qp_num = qp->qp_num;
 814         id_priv->srq = (qp->srq != NULL);
 815         return 0;
 816 err:
 817         ib_destroy_qp(qp);
 818         return ret;
 819 }
 820 EXPORT_SYMBOL(rdma_create_qp);
 821
 822 void rdma_destroy_qp(struct rdma_cm_id *id)
 823 {
 824         struct rdma_id_private *id_priv;
 825
 826         id_priv = container_of(id, struct rdma_id_private, id);
 827         mutex_lock(&id_priv->qp_mutex);
 828         ib_destroy_qp(id_priv->id.qp);
 829         id_priv->id.qp = NULL;
 830         mutex_unlock(&id_priv->qp_mutex);
 831 }
 832 EXPORT_SYMBOL(rdma_destroy_qp);
 833
 834 static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
 835                              struct rdma_conn_param *conn_param)
 836 {
 837         struct ib_qp_attr qp_attr;
 838         int qp_attr_mask, ret;
 839         union ib_gid sgid;
 840
 841         mutex_lock(&id_priv->qp_mutex);
 842         if (!id_priv->id.qp) {
 843                 ret = 0;
 844                 goto out;
 845         }
 846
 847         /* Need to update QP attributes from default values. */
 848         qp_attr.qp_state = IB_QPS_INIT;
 849         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 850         if (ret)
 851                 goto out;
 852
 853         ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
 854         if (ret)
 855                 goto out;
 856
 857         qp_attr.qp_state = IB_QPS_RTR;
 858         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 859         if (ret)
 860                 goto out;
 861
 862         ret = ib_query_gid(id_priv->id.device, id_priv->id.port_num,
 863                            qp_attr.ah_attr.grh.sgid_index, &sgid, NULL);
 864         if (ret)
 865                 goto out;
 866
 867         BUG_ON(id_priv->cma_dev->device != id_priv->id.device);
 868
 869         if (conn_param)
 870                 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
 871         ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
 872 out:
 873         mutex_unlock(&id_priv->qp_mutex);
 874         return ret;
 875 }
 876
 877 static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
 878                              struct rdma_conn_param *conn_param)
 879 {
 880         struct ib_qp_attr qp_attr;
 881         int qp_attr_mask, ret;
 882
 883         mutex_lock(&id_priv->qp_mutex);
 884         if (!id_priv->id.qp) {
 885                 ret = 0;
 886                 goto out;
 887         }
 888
 889         qp_attr.qp_state = IB_QPS_RTS;
 890         ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 891         if (ret)
 892                 goto out;
 893
 894         if (conn_param)
 895                 qp_attr.max_rd_atomic = conn_param->initiator_depth;
 896         ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
 897 out:
 898         mutex_unlock(&id_priv->qp_mutex);
 899         return ret;
 900 }
 901
 902 static int cma_modify_qp_err(struct rdma_id_private *id_priv)
 903 {
 904         struct ib_qp_attr qp_attr;
 905         int ret;
 906
 907         mutex_lock(&id_priv->qp_mutex);
 908         if (!id_priv->id.qp) {
 909                 ret = 0;
 910                 goto out;
 911         }
 912
 913         qp_attr.qp_state = IB_QPS_ERR;
 914         ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
 915 out:
 916         mutex_unlock(&id_priv->qp_mutex);
 917         return ret;
 918 }
 919
 920 static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
 921                                struct ib_qp_attr *qp_attr, int *qp_attr_mask)
 922 {
 923         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
 924         int ret;
 925         u16 pkey;
 926
 927         if (rdma_cap_eth_ah(id_priv->id.device, id_priv->id.port_num))
 928                 pkey = 0xffff;
 929         else
 930                 pkey = ib_addr_get_pkey(dev_addr);
 931
 932         ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
 933                                   pkey, &qp_attr->pkey_index);
 934         if (ret)
 935                 return ret;
 936
 937         qp_attr->port_num = id_priv->id.port_num;
 938         *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
 939
 940         if (id_priv->id.qp_type == IB_QPT_UD) {
 941                 ret = cma_set_qkey(id_priv, 0);
 942                 if (ret)
 943                         return ret;
 944
 945                 qp_attr->qkey = id_priv->qkey;
 946                 *qp_attr_mask |= IB_QP_QKEY;
 947         } else {
 948                 qp_attr->qp_access_flags = 0;
 949                 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
 950         }
 951         return 0;
 952 }
 953
 954 int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
 955                        int *qp_attr_mask)
 956 {
 957         struct rdma_id_private *id_priv;
 958         int ret = 0;
 959
 960         id_priv = container_of(id, struct rdma_id_private, id);
 961         if (rdma_cap_ib_cm(id->device, id->port_num)) {
 962                 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD))
 963                         ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
 964                 else
 965                         ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
 966                                                  qp_attr_mask);
 967
 968                 if (qp_attr->qp_state == IB_QPS_RTR)
 969                         qp_attr->rq_psn = id_priv->seq_num;
 970         } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
 971                 if (!id_priv->cm_id.iw) {
 972                         qp_attr->qp_access_flags = 0;
 973                         *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
 974                 } else
 975                         ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
 976                                                  qp_attr_mask);
 977         } else
 978                 ret = -ENOSYS;
 979
 980         return ret;
 981 }
 982 EXPORT_SYMBOL(rdma_init_qp_attr);
 983
 984 static inline int cma_zero_addr(struct sockaddr *addr)
 985 {
 986         switch (addr->sa_family) {
 987         case AF_INET:
 988                 return ipv4_is_zeronet(((struct sockaddr_in *)addr)->sin_addr.s_addr);
 989         case AF_INET6:
 990                 return ipv6_addr_any(&((struct sockaddr_in6 *) addr)->sin6_addr);
 991         case AF_IB:
 992                 return ib_addr_any(&((struct sockaddr_ib *) addr)->sib_addr);
 993         default:
 994                 return 0;
 995         }
 996 }
 997
 998 static inline int cma_loopback_addr(struct sockaddr *addr)
 999 {
1000         switch (addr->sa_family) {
1001         case AF_INET:
1002                 return ipv4_is_loopback(((struct sockaddr_in *) addr)->sin_addr.s_addr);
1003         case AF_INET6:
1004                 return ipv6_addr_loopback(&((struct sockaddr_in6 *) addr)->sin6_addr);
1005         case AF_IB:
1006                 return ib_addr_loopback(&((struct sockaddr_ib *) addr)->sib_addr);
1007         default:
1008                 return 0;
1009         }
1010 }
1011
1012 static inline int cma_any_addr(struct sockaddr *addr)
1013 {
1014         return cma_zero_addr(addr) || cma_loopback_addr(addr);
1015 }
1016
1017 static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst)
1018 {
1019         if (src->sa_family != dst->sa_family)
1020                 return -1;
1021
1022         switch (src->sa_family) {
1023         case AF_INET:
1024                 return ((struct sockaddr_in *) src)->sin_addr.s_addr !=
1025                        ((struct sockaddr_in *) dst)->sin_addr.s_addr;
1026         case AF_INET6:
1027                 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr,
1028                                      &((struct sockaddr_in6 *) dst)->sin6_addr);
1029         default:
1030                 return ib_addr_cmp(&((struct sockaddr_ib *) src)->sib_addr,
1031                                    &((struct sockaddr_ib *) dst)->sib_addr);
1032         }
1033 }
1034
1035 static __be16 cma_port(struct sockaddr *addr)
1036 {
1037         struct sockaddr_ib *sib;
1038
1039         switch (addr->sa_family) {
1040         case AF_INET:
1041                 return ((struct sockaddr_in *) addr)->sin_port;
1042         case AF_INET6:
1043                 return ((struct sockaddr_in6 *) addr)->sin6_port;
1044         case AF_IB:
1045                 sib = (struct sockaddr_ib *) addr;
1046                 return htons((u16) (be64_to_cpu(sib->sib_sid) &
1047                                     be64_to_cpu(sib->sib_sid_mask)));
1048         default:
1049                 return 0;
1050         }
1051 }
1052
1053 static inline int cma_any_port(struct sockaddr *addr)
1054 {
1055         return !cma_port(addr);
1056 }
1057
1058 static void cma_save_ib_info(struct sockaddr *src_addr,
1059                              struct sockaddr *dst_addr,
1060                              struct rdma_cm_id *listen_id,
1061                              struct ib_sa_path_rec *path)
1062 {
1063         struct sockaddr_ib *listen_ib, *ib;
1064
1065         listen_ib = (struct sockaddr_ib *) &listen_id->route.addr.src_addr;
1066         if (src_addr) {
1067                 ib = (struct sockaddr_ib *)src_addr;
1068                 ib->sib_family = AF_IB;
1069                 if (path) {
1070                         ib->sib_pkey = path->pkey;
1071                         ib->sib_flowinfo = path->flow_label;
1072                         memcpy(&ib->sib_addr, &path->sgid, 16);
1073                         ib->sib_sid = path->service_id;
1074                         ib->sib_scope_id = 0;
1075                 } else {
1076                         ib->sib_pkey = listen_ib->sib_pkey;
1077                         ib->sib_flowinfo = listen_ib->sib_flowinfo;
1078                         ib->sib_addr = listen_ib->sib_addr;
1079                         ib->sib_sid = listen_ib->sib_sid;
1080                         ib->sib_scope_id = listen_ib->sib_scope_id;
1081                 }
1082                 ib->sib_sid_mask = cpu_to_be64(0xffffffffffffffffULL);
1083         }
1084         if (dst_addr) {
1085                 ib = (struct sockaddr_ib *)dst_addr;
1086                 ib->sib_family = AF_IB;
1087                 if (path) {
1088                         ib->sib_pkey = path->pkey;
1089                         ib->sib_flowinfo = path->flow_label;
1090                         memcpy(&ib->sib_addr, &path->dgid, 16);
1091                 }
1092         }
1093 }
1094
1095 static void cma_save_ip4_info(struct sockaddr_in *src_addr,
1096                               struct sockaddr_in *dst_addr,
1097                               struct cma_hdr *hdr,
1098                               __be16 local_port)
1099 {
1100         if (src_addr) {
1101                 *src_addr = (struct sockaddr_in) {
1102                         .sin_len = sizeof(struct sockaddr_in),
1103                         .sin_family = AF_INET,
1104                         .sin_addr.s_addr = hdr->dst_addr.ip4.addr,
1105                         .sin_port = local_port,
1106                 };
1107         }
1108
1109         if (dst_addr) {
1110                 *dst_addr = (struct sockaddr_in) {
1111                         .sin_len = sizeof(struct sockaddr_in),
1112                         .sin_family = AF_INET,
1113                         .sin_addr.s_addr = hdr->src_addr.ip4.addr,
1114                         .sin_port = hdr->port,
1115                 };
1116         }
1117 }
1118
1119 static void cma_ip6_clear_scope_id(struct in6_addr *addr)
1120 {
1121         /* make sure link local scope ID gets zeroed */
1122         if (IN6_IS_SCOPE_LINKLOCAL(addr) ||
1123             IN6_IS_ADDR_MC_INTFACELOCAL(addr)) {
1124                 /* use byte-access to be alignment safe */
1125                 addr->s6_addr[2] = 0;
1126                 addr->s6_addr[3] = 0;
1127         }
1128 }
1129
1130 static void cma_save_ip6_info(struct sockaddr_in6 *src_addr,
1131                               struct sockaddr_in6 *dst_addr,
1132                               struct cma_hdr *hdr,
1133                               __be16 local_port)
1134 {
1135         if (src_addr) {
1136                 *src_addr = (struct sockaddr_in6) {
1137                         .sin6_len = sizeof(struct sockaddr_in6),
1138                         .sin6_family = AF_INET6,
1139                         .sin6_addr = hdr->dst_addr.ip6,
1140                         .sin6_port = local_port,
1141                 };
1142                 cma_ip6_clear_scope_id(&src_addr->sin6_addr);
1143         }
1144
1145         if (dst_addr) {
1146                 *dst_addr = (struct sockaddr_in6) {
1147                         .sin6_len = sizeof(struct sockaddr_in6),
1148                         .sin6_family = AF_INET6,
1149                         .sin6_addr = hdr->src_addr.ip6,
1150                         .sin6_port = hdr->port,
1151                 };
1152                 cma_ip6_clear_scope_id(&dst_addr->sin6_addr);
1153         }
1154 }
1155
1156 static u16 cma_port_from_service_id(__be64 service_id)
1157 {
1158         return (u16)be64_to_cpu(service_id);
1159 }
1160
1161 static int cma_save_ip_info(struct sockaddr *src_addr,
1162                             struct sockaddr *dst_addr,
1163                             struct ib_cm_event *ib_event,
1164                             __be64 service_id)
1165 {
1166         struct cma_hdr *hdr;
1167         __be16 port;
1168
1169         hdr = ib_event->private_data;
1170         if (hdr->cma_version != CMA_VERSION)
1171                 return -EINVAL;
1172
1173         port = htons(cma_port_from_service_id(service_id));
1174
1175         switch (cma_get_ip_ver(hdr)) {
1176         case 4:
1177                 cma_save_ip4_info((struct sockaddr_in *)src_addr,
1178                                   (struct sockaddr_in *)dst_addr, hdr, port);
1179                 break;
1180         case 6:
1181                 cma_save_ip6_info((struct sockaddr_in6 *)src_addr,
1182                                   (struct sockaddr_in6 *)dst_addr, hdr, port);
1183                 break;
1184         default:
1185                 return -EAFNOSUPPORT;
1186         }
1187
1188         return 0;
1189 }
1190
1191 static int cma_save_net_info(struct sockaddr *src_addr,
1192                              struct sockaddr *dst_addr,
1193                              struct rdma_cm_id *listen_id,
1194                              struct ib_cm_event *ib_event,
1195                              sa_family_t sa_family, __be64 service_id)
1196 {
1197         if (sa_family == AF_IB) {
1198                 if (ib_event->event == IB_CM_REQ_RECEIVED)
1199                         cma_save_ib_info(src_addr, dst_addr, listen_id,
1200                                          ib_event->param.req_rcvd.primary_path);
1201                 else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED)
1202                         cma_save_ib_info(src_addr, dst_addr, listen_id, NULL);
1203                 return 0;
1204         }
1205
1206         return cma_save_ip_info(src_addr, dst_addr, ib_event, service_id);
1207 }
1208
1209 static int cma_save_req_info(const struct ib_cm_event *ib_event,
1210                              struct cma_req_info *req)
1211 {
1212         const struct ib_cm_req_event_param *req_param =
1213                 &ib_event->param.req_rcvd;
1214         const struct ib_cm_sidr_req_event_param *sidr_param =
1215                 &ib_event->param.sidr_req_rcvd;
1216
1217         switch (ib_event->event) {
1218         case IB_CM_REQ_RECEIVED:
1219                 req->device     = req_param->listen_id->device;
1220                 req->port       = req_param->port;
1221                 memcpy(&req->local_gid, &req_param->primary_path->sgid,
1222                        sizeof(req->local_gid));
1223                 req->has_gid    = true;
1224                 req->service_id = req_param->primary_path->service_id;
1225                 req->pkey       = be16_to_cpu(req_param->primary_path->pkey);
1226                 if (req->pkey != req_param->bth_pkey)
1227                         pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and primary path P_Key (0x%x)\n"
1228                                             "RDMA CMA: in the future this may cause the request to be dropped\n",
1229                                             req_param->bth_pkey, req->pkey);
1230                 break;
1231         case IB_CM_SIDR_REQ_RECEIVED:
1232                 req->device     = sidr_param->listen_id->device;
1233                 req->port       = sidr_param->port;
1234                 req->has_gid    = false;
1235                 req->service_id = sidr_param->service_id;
1236                 req->pkey       = sidr_param->pkey;
1237                 if (req->pkey != sidr_param->bth_pkey)
1238                         pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and SIDR request payload P_Key (0x%x)\n"
1239                                             "RDMA CMA: in the future this may cause the request to be dropped\n",
1240                                             sidr_param->bth_pkey, req->pkey);
1241                 break;
1242         default:
1243                 return -EINVAL;
1244         }
1245
1246         return 0;
1247 }
1248
1249 static bool validate_ipv4_net_dev(struct net_device *net_dev,
1250                                   const struct sockaddr_in *dst_addr,
1251                                   const struct sockaddr_in *src_addr)
1252 {
1253 #ifdef INET
1254         struct sockaddr_in dst_tmp = *dst_addr;
1255         __be32 daddr = dst_addr->sin_addr.s_addr,
1256                saddr = src_addr->sin_addr.s_addr;
1257         struct net_device *src_dev;
1258         struct rtentry *rte;
1259         bool ret;
1260
1261         if (ipv4_is_multicast(saddr) || ipv4_is_lbcast(saddr) ||
1262             ipv4_is_lbcast(daddr) || ipv4_is_zeronet(saddr) ||
1263             ipv4_is_zeronet(daddr) || ipv4_is_loopback(daddr) ||
1264             ipv4_is_loopback(saddr))
1265                 return false;
1266
1267         src_dev = ip_dev_find(net_dev->if_vnet, saddr);
1268         if (src_dev != net_dev) {
1269                 if (src_dev != NULL)
1270                         dev_put(src_dev);
1271                 return false;
1272         }
1273         dev_put(src_dev);
1274
1275         /*
1276          * Make sure the socket address length field
1277          * is set, else rtalloc1() will fail.
1278          */
1279         dst_tmp.sin_len = sizeof(dst_tmp);
1280
1281         CURVNET_SET(net_dev->if_vnet);
1282         rte = rtalloc1((struct sockaddr *)&dst_tmp, 1, 0);
1283         CURVNET_RESTORE();
1284         if (rte != NULL) {
1285                 ret = (rte->rt_ifp == net_dev);
1286                 RTFREE_LOCKED(rte);
1287         } else {
1288                 ret = false;
1289         }
1290         return ret;
1291 #else
1292         return false;
1293 #endif
1294 }
1295
1296 static bool validate_ipv6_net_dev(struct net_device *net_dev,
1297                                   const struct sockaddr_in6 *dst_addr,
1298                                   const struct sockaddr_in6 *src_addr)
1299 {
1300 #ifdef INET6
1301         struct sockaddr_in6 dst_tmp = *dst_addr;
1302         struct in6_addr in6_addr = src_addr->sin6_addr;
1303         struct net_device *src_dev;
1304         struct rtentry *rte;
1305         bool ret;
1306
1307         src_dev = ip6_dev_find(net_dev->if_vnet, in6_addr);
1308         if (src_dev != net_dev)
1309                 return false;
1310
1311         /*
1312          * Make sure the socket address length field
1313          * is set, else rtalloc1() will fail.
1314          */
1315         dst_tmp.sin6_len = sizeof(dst_tmp);
1316
1317         CURVNET_SET(net_dev->if_vnet);
1318         rte = rtalloc1((struct sockaddr *)&dst_tmp, 1, 0);
1319         CURVNET_RESTORE();
1320         if (rte != NULL) {
1321                 ret = (rte->rt_ifp == net_dev);
1322                 RTFREE_LOCKED(rte);
1323         } else {
1324                 ret = false;
1325         }
1326         return ret;
1327 #else
1328         return false;
1329 #endif
1330 }
1331
1332 static bool validate_net_dev(struct net_device *net_dev,
1333                              const struct sockaddr *daddr,
1334                              const struct sockaddr *saddr)
1335 {
1336         const struct sockaddr_in *daddr4 = (const struct sockaddr_in *)daddr;
1337         const struct sockaddr_in *saddr4 = (const struct sockaddr_in *)saddr;
1338         const struct sockaddr_in6 *daddr6 = (const struct sockaddr_in6 *)daddr;
1339         const struct sockaddr_in6 *saddr6 = (const struct sockaddr_in6 *)saddr;
1340
1341         switch (daddr->sa_family) {
1342         case AF_INET:
1343                 return saddr->sa_family == AF_INET &&
1344                        validate_ipv4_net_dev(net_dev, daddr4, saddr4);
1345
1346         case AF_INET6:
1347                 return saddr->sa_family == AF_INET6 &&
1348                        validate_ipv6_net_dev(net_dev, daddr6, saddr6);
1349
1350         default:
1351                 return false;
1352         }
1353 }
1354
1355 static struct net_device *cma_get_net_dev(struct ib_cm_event *ib_event,
1356                                           const struct cma_req_info *req)
1357 {
1358         struct sockaddr_storage listen_addr_storage, src_addr_storage;
1359         struct sockaddr *listen_addr = (struct sockaddr *)&listen_addr_storage,
1360                         *src_addr = (struct sockaddr *)&src_addr_storage;
1361         struct net_device *net_dev;
1362         const union ib_gid *gid = req->has_gid ? &req->local_gid : NULL;
1363         int err;
1364
1365         err = cma_save_ip_info(listen_addr, src_addr, ib_event,
1366                                req->service_id);
1367         if (err)
1368                 return ERR_PTR(err);
1369
1370         net_dev = ib_get_net_dev_by_params(req->device, req->port, req->pkey,
1371                                            gid, listen_addr);
1372         if (!net_dev)
1373                 return ERR_PTR(-ENODEV);
1374
1375         if (!validate_net_dev(net_dev, listen_addr, src_addr)) {
1376                 dev_put(net_dev);
1377                 return ERR_PTR(-EHOSTUNREACH);
1378         }
1379
1380         return net_dev;
1381 }
1382
1383 static enum rdma_port_space rdma_ps_from_service_id(__be64 service_id)
1384 {
1385         return (be64_to_cpu(service_id) >> 16) & 0xffff;
1386 }
1387
1388 static bool cma_match_private_data(struct rdma_id_private *id_priv,
1389                                    const struct cma_hdr *hdr)
1390 {
1391         struct sockaddr *addr = cma_src_addr(id_priv);
1392         __be32 ip4_addr;
1393         struct in6_addr ip6_addr;
1394
1395         if (cma_any_addr(addr) && !id_priv->afonly)
1396                 return true;
1397
1398         switch (addr->sa_family) {
1399         case AF_INET:
1400                 ip4_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
1401                 if (cma_get_ip_ver(hdr) != 4)
1402                         return false;
1403                 if (!cma_any_addr(addr) &&
1404                     hdr->dst_addr.ip4.addr != ip4_addr)
1405                         return false;
1406                 break;
1407         case AF_INET6:
1408                 ip6_addr = ((struct sockaddr_in6 *)addr)->sin6_addr;
1409                 if (cma_get_ip_ver(hdr) != 6)
1410                         return false;
1411                 cma_ip6_clear_scope_id(&ip6_addr);
1412                 if (!cma_any_addr(addr) &&
1413                     memcmp(&hdr->dst_addr.ip6, &ip6_addr, sizeof(ip6_addr)))
1414                         return false;
1415                 break;
1416         case AF_IB:
1417                 return true;
1418         default:
1419                 return false;
1420         }
1421
1422         return true;
1423 }
1424
1425 static bool cma_protocol_roce_dev_port(struct ib_device *device, int port_num)
1426 {
1427         enum rdma_link_layer ll = rdma_port_get_link_layer(device, port_num);
1428         enum rdma_transport_type transport =
1429                 rdma_node_get_transport(device->node_type);
1430
1431         return ll == IB_LINK_LAYER_ETHERNET && transport == RDMA_TRANSPORT_IB;
1432 }
1433
1434 static bool cma_protocol_roce(const struct rdma_cm_id *id)
1435 {
1436         struct ib_device *device = id->device;
1437         const int port_num = id->port_num ?: rdma_start_port(device);
1438
1439         return cma_protocol_roce_dev_port(device, port_num);
1440 }
1441
1442 static bool cma_match_net_dev(const struct rdma_cm_id *id,
1443                               const struct net_device *net_dev,
1444                               u8 port_num)
1445 {
1446         const struct rdma_addr *addr = &id->route.addr;
1447
1448         if (!net_dev)
1449                 /* This request is an AF_IB request or a RoCE request */
1450                 return (!id->port_num || id->port_num == port_num) &&
1451                        (addr->src_addr.ss_family == AF_IB ||
1452                         cma_protocol_roce_dev_port(id->device, port_num));
1453
1454         return !addr->dev_addr.bound_dev_if ||
1455                (net_eq(dev_net(net_dev), addr->dev_addr.net) &&
1456                 addr->dev_addr.bound_dev_if == net_dev->if_index);
1457 }
1458
1459 static struct rdma_id_private *cma_find_listener(
1460                 const struct rdma_bind_list *bind_list,
1461                 const struct ib_cm_id *cm_id,
1462                 const struct ib_cm_event *ib_event,
1463                 const struct cma_req_info *req,
1464                 const struct net_device *net_dev)
1465 {
1466         struct rdma_id_private *id_priv, *id_priv_dev;
1467
1468         if (!bind_list)
1469                 return ERR_PTR(-EINVAL);
1470
1471         hlist_for_each_entry(id_priv, &bind_list->owners, node) {
1472                 if (cma_match_private_data(id_priv, ib_event->private_data)) {
1473                         if (id_priv->id.device == cm_id->device &&
1474                             cma_match_net_dev(&id_priv->id, net_dev, req->port))
1475                                 return id_priv;
1476                         list_for_each_entry(id_priv_dev,
1477                                             &id_priv->listen_list,
1478                                             listen_list) {
1479                                 if (id_priv_dev->id.device == cm_id->device &&
1480                                     cma_match_net_dev(&id_priv_dev->id, net_dev, req->port))
1481                                         return id_priv_dev;
1482                         }
1483                 }
1484         }
1485
1486         return ERR_PTR(-EINVAL);
1487 }
1488
1489 static struct rdma_id_private *cma_id_from_event(struct ib_cm_id *cm_id,
1490                                                  struct ib_cm_event *ib_event,
1491                                                  struct net_device **net_dev)
1492 {
1493         struct cma_req_info req;
1494         struct rdma_bind_list *bind_list;
1495         struct rdma_id_private *id_priv;
1496         int err;
1497
1498         err = cma_save_req_info(ib_event, &req);
1499         if (err)
1500                 return ERR_PTR(err);
1501
1502         *net_dev = cma_get_net_dev(ib_event, &req);
1503         if (IS_ERR(*net_dev)) {
1504                 if (PTR_ERR(*net_dev) == -EAFNOSUPPORT) {
1505                         /* Assuming the protocol is AF_IB */
1506                         *net_dev = NULL;
1507                 } else if (cma_protocol_roce_dev_port(req.device, req.port)) {
1508                         /* TODO find the net dev matching the request parameters
1509                          * through the RoCE GID table */
1510                         *net_dev = NULL;
1511                 } else {
1512                         return ERR_CAST(*net_dev);
1513                 }
1514         }
1515
1516         bind_list = cma_ps_find(*net_dev ? dev_net(*net_dev) : &init_net,
1517                                 rdma_ps_from_service_id(req.service_id),
1518                                 cma_port_from_service_id(req.service_id));
1519         id_priv = cma_find_listener(bind_list, cm_id, ib_event, &req, *net_dev);
1520         if (IS_ERR(id_priv) && *net_dev) {
1521                 dev_put(*net_dev);
1522                 *net_dev = NULL;
1523         }
1524
1525         return id_priv;
1526 }
1527
1528 static inline int cma_user_data_offset(struct rdma_id_private *id_priv)
1529 {
1530         return cma_family(id_priv) == AF_IB ? 0 : sizeof(struct cma_hdr);
1531 }
1532
1533 static void cma_cancel_route(struct rdma_id_private *id_priv)
1534 {
1535         if (rdma_cap_ib_sa(id_priv->id.device, id_priv->id.port_num)) {
1536                 if (id_priv->query)
1537                         ib_sa_cancel_query(id_priv->query_id, id_priv->query);
1538         }
1539 }
1540
1541 static void cma_cancel_listens(struct rdma_id_private *id_priv)
1542 {
1543         struct rdma_id_private *dev_id_priv;
1544
1545         /*
1546          * Remove from listen_any_list to prevent added devices from spawning
1547          * additional listen requests.
1548          */
1549         mutex_lock(&lock);
1550         list_del(&id_priv->list);
1551
1552         while (!list_empty(&id_priv->listen_list)) {
1553                 dev_id_priv = list_entry(id_priv->listen_list.next,
1554                                          struct rdma_id_private, listen_list);
1555                 /* sync with device removal to avoid duplicate destruction */
1556                 list_del_init(&dev_id_priv->list);
1557                 list_del(&dev_id_priv->listen_list);
1558                 mutex_unlock(&lock);
1559
1560                 rdma_destroy_id(&dev_id_priv->id);
1561                 mutex_lock(&lock);
1562         }
1563         mutex_unlock(&lock);
1564 }
1565
1566 static void cma_cancel_operation(struct rdma_id_private *id_priv,
1567                                  enum rdma_cm_state state)
1568 {
1569         switch (state) {
1570         case RDMA_CM_ADDR_QUERY:
1571                 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
1572                 break;
1573         case RDMA_CM_ROUTE_QUERY:
1574                 cma_cancel_route(id_priv);
1575                 break;
1576         case RDMA_CM_LISTEN:
1577                 if (cma_any_addr(cma_src_addr(id_priv)) && !id_priv->cma_dev)
1578                         cma_cancel_listens(id_priv);
1579                 break;
1580         default:
1581                 break;
1582         }
1583 }
1584
1585 static void cma_release_port(struct rdma_id_private *id_priv)
1586 {
1587         struct rdma_bind_list *bind_list = id_priv->bind_list;
1588         struct vnet *net = id_priv->id.route.addr.dev_addr.net;
1589
1590         if (!bind_list)
1591                 return;
1592
1593         mutex_lock(&lock);
1594         hlist_del(&id_priv->node);
1595         if (hlist_empty(&bind_list->owners)) {
1596                 cma_ps_remove(net, bind_list->ps, bind_list->port);
1597                 kfree(bind_list);
1598         }
1599         mutex_unlock(&lock);
1600 }
1601
1602 static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
1603 {
1604         struct cma_multicast *mc;
1605
1606         while (!list_empty(&id_priv->mc_list)) {
1607                 mc = container_of(id_priv->mc_list.next,
1608                                   struct cma_multicast, list);
1609                 list_del(&mc->list);
1610                 if (rdma_cap_ib_mcast(id_priv->cma_dev->device,
1611                                       id_priv->id.port_num)) {
1612                         ib_sa_free_multicast(mc->multicast.ib);
1613                         kfree(mc);
1614                 } else {
1615                         if (mc->igmp_joined) {
1616                                 struct rdma_dev_addr *dev_addr =
1617                                         &id_priv->id.route.addr.dev_addr;
1618                                 struct net_device *ndev = NULL;
1619
1620                                 if (dev_addr->bound_dev_if)
1621                                         ndev = dev_get_by_index(dev_addr->net,
1622                                                                 dev_addr->bound_dev_if);
1623                                 if (ndev) {
1624                                         dev_put(ndev);
1625                                 }
1626                         }
1627                         kref_put(&mc->mcref, release_mc);
1628                 }
1629         }
1630 }
1631
1632 void rdma_destroy_id(struct rdma_cm_id *id)
1633 {
1634         struct rdma_id_private *id_priv;
1635         enum rdma_cm_state state;
1636
1637         id_priv = container_of(id, struct rdma_id_private, id);
1638         state = cma_exch(id_priv, RDMA_CM_DESTROYING);
1639         cma_cancel_operation(id_priv, state);
1640
1641         /*
1642          * Wait for any active callback to finish.  New callbacks will find
1643          * the id_priv state set to destroying and abort.
1644          */
1645         mutex_lock(&id_priv->handler_mutex);
1646         mutex_unlock(&id_priv->handler_mutex);
1647
1648         if (id_priv->cma_dev) {
1649                 if (rdma_cap_ib_cm(id_priv->id.device, 1)) {
1650                         if (id_priv->cm_id.ib)
1651                                 ib_destroy_cm_id(id_priv->cm_id.ib);
1652                 } else if (rdma_cap_iw_cm(id_priv->id.device, 1)) {
1653                         if (id_priv->cm_id.iw)
1654                                 iw_destroy_cm_id(id_priv->cm_id.iw);
1655                 }
1656                 cma_leave_mc_groups(id_priv);
1657                 cma_release_dev(id_priv);
1658         }
1659
1660         cma_release_port(id_priv);
1661         cma_deref_id(id_priv);
1662         wait_for_completion(&id_priv->comp);
1663
1664         if (id_priv->internal_id)
1665                 cma_deref_id(id_priv->id.context);
1666
1667         kfree(id_priv->id.route.path_rec);
1668         kfree(id_priv);
1669 }
1670 EXPORT_SYMBOL(rdma_destroy_id);
1671
1672 static int cma_rep_recv(struct rdma_id_private *id_priv)
1673 {
1674         int ret;
1675
1676         ret = cma_modify_qp_rtr(id_priv, NULL);
1677         if (ret)
1678                 goto reject;
1679
1680         ret = cma_modify_qp_rts(id_priv, NULL);
1681         if (ret)
1682                 goto reject;
1683
1684         ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
1685         if (ret)
1686                 goto reject;
1687
1688         return 0;
1689 reject:
1690         cma_modify_qp_err(id_priv);
1691         ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
1692                        NULL, 0, NULL, 0);
1693         return ret;
1694 }
1695
1696 static void cma_set_rep_event_data(struct rdma_cm_event *event,
1697                                    struct ib_cm_rep_event_param *rep_data,
1698                                    void *private_data)
1699 {
1700         event->param.conn.private_data = private_data;
1701         event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
1702         event->param.conn.responder_resources = rep_data->responder_resources;
1703         event->param.conn.initiator_depth = rep_data->initiator_depth;
1704         event->param.conn.flow_control = rep_data->flow_control;
1705         event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
1706         event->param.conn.srq = rep_data->srq;
1707         event->param.conn.qp_num = rep_data->remote_qpn;
1708 }
1709
1710 static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1711 {
1712         struct rdma_id_private *id_priv = cm_id->context;
1713         struct rdma_cm_event event;
1714         int ret = 0;
1715
1716         mutex_lock(&id_priv->handler_mutex);
1717         if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
1718              id_priv->state != RDMA_CM_CONNECT) ||
1719             (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
1720              id_priv->state != RDMA_CM_DISCONNECT))
1721                 goto out;
1722
1723         memset(&event, 0, sizeof event);
1724         switch (ib_event->event) {
1725         case IB_CM_REQ_ERROR:
1726         case IB_CM_REP_ERROR:
1727                 event.event = RDMA_CM_EVENT_UNREACHABLE;
1728                 event.status = -ETIMEDOUT;
1729                 break;
1730         case IB_CM_REP_RECEIVED:
1731                 if (id_priv->id.qp) {
1732                         event.status = cma_rep_recv(id_priv);
1733                         event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
1734                                                      RDMA_CM_EVENT_ESTABLISHED;
1735                 } else {
1736                         event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
1737                 }
1738                 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
1739                                        ib_event->private_data);
1740                 break;
1741         case IB_CM_RTU_RECEIVED:
1742         case IB_CM_USER_ESTABLISHED:
1743                 event.event = RDMA_CM_EVENT_ESTABLISHED;
1744                 break;
1745         case IB_CM_DREQ_ERROR:
1746                 event.status = -ETIMEDOUT; /* fall through */
1747         case IB_CM_DREQ_RECEIVED:
1748         case IB_CM_DREP_RECEIVED:
1749                 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT,
1750                                    RDMA_CM_DISCONNECT))
1751                         goto out;
1752                 event.event = RDMA_CM_EVENT_DISCONNECTED;
1753                 break;
1754         case IB_CM_TIMEWAIT_EXIT:
1755                 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
1756                 break;
1757         case IB_CM_MRA_RECEIVED:
1758                 /* ignore event */
1759                 goto out;
1760         case IB_CM_REJ_RECEIVED:
1761                 cma_modify_qp_err(id_priv);
1762                 event.status = ib_event->param.rej_rcvd.reason;
1763                 event.event = RDMA_CM_EVENT_REJECTED;
1764                 event.param.conn.private_data = ib_event->private_data;
1765                 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
1766                 break;
1767         default:
1768                 pr_err("RDMA CMA: unexpected IB CM event: %d\n",
1769                        ib_event->event);
1770                 goto out;
1771         }
1772
1773         ret = id_priv->id.event_handler(&id_priv->id, &event);
1774         if (ret) {
1775                 /* Destroy the CM ID by returning a non-zero value. */
1776                 id_priv->cm_id.ib = NULL;
1777                 cma_exch(id_priv, RDMA_CM_DESTROYING);
1778                 mutex_unlock(&id_priv->handler_mutex);
1779                 rdma_destroy_id(&id_priv->id);
1780                 return ret;
1781         }
1782 out:
1783         mutex_unlock(&id_priv->handler_mutex);
1784         return ret;
1785 }
1786
1787 static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
1788                                                struct ib_cm_event *ib_event,
1789                                                struct net_device *net_dev)
1790 {
1791         struct rdma_id_private *id_priv;
1792         struct rdma_cm_id *id;
1793         struct rdma_route *rt;
1794         const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
1795         const __be64 service_id =
1796                       ib_event->param.req_rcvd.primary_path->service_id;
1797         int ret;
1798
1799         id = rdma_create_id(listen_id->route.addr.dev_addr.net,
1800                             listen_id->event_handler, listen_id->context,
1801                             listen_id->ps, ib_event->param.req_rcvd.qp_type);
1802         if (IS_ERR(id))
1803                 return NULL;
1804
1805         id_priv = container_of(id, struct rdma_id_private, id);
1806         if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
1807                               (struct sockaddr *)&id->route.addr.dst_addr,
1808                               listen_id, ib_event, ss_family, service_id))
1809                 goto err;
1810
1811         rt = &id->route;
1812         rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
1813         rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
1814                                GFP_KERNEL);
1815         if (!rt->path_rec)
1816                 goto err;
1817
1818         rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
1819         if (rt->num_paths == 2)
1820                 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1821
1822         if (net_dev) {
1823                 ret = rdma_copy_addr(&rt->addr.dev_addr, net_dev, NULL);
1824                 if (ret)
1825                         goto err;
1826         } else {
1827                 if (!cma_protocol_roce(listen_id) &&
1828                     cma_any_addr(cma_src_addr(id_priv))) {
1829                         rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
1830                         rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
1831                         ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
1832                 } else if (!cma_any_addr(cma_src_addr(id_priv))) {
1833                         ret = cma_translate_addr(cma_src_addr(id_priv), &rt->addr.dev_addr);
1834                         if (ret)
1835                                 goto err;
1836                 }
1837         }
1838         rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
1839
1840         id_priv->state = RDMA_CM_CONNECT;
1841         return id_priv;
1842
1843 err:
1844         rdma_destroy_id(id);
1845         return NULL;
1846 }
1847
1848 static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
1849                                               struct ib_cm_event *ib_event,
1850                                               struct net_device *net_dev)
1851 {
1852         struct rdma_id_private *id_priv;
1853         struct rdma_cm_id *id;
1854         const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
1855         struct vnet *net = listen_id->route.addr.dev_addr.net;
1856         int ret;
1857
1858         id = rdma_create_id(net, listen_id->event_handler, listen_id->context,
1859                             listen_id->ps, IB_QPT_UD);
1860         if (IS_ERR(id))
1861                 return NULL;
1862
1863         id_priv = container_of(id, struct rdma_id_private, id);
1864         if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
1865                               (struct sockaddr *)&id->route.addr.dst_addr,
1866                               listen_id, ib_event, ss_family,
1867                               ib_event->param.sidr_req_rcvd.service_id))
1868                 goto err;
1869
1870         if (net_dev) {
1871                 ret = rdma_copy_addr(&id->route.addr.dev_addr, net_dev, NULL);
1872                 if (ret)
1873                         goto err;
1874         } else {
1875                 if (!cma_any_addr(cma_src_addr(id_priv))) {
1876                         ret = cma_translate_addr(cma_src_addr(id_priv),
1877                                                  &id->route.addr.dev_addr);
1878                         if (ret)
1879                                 goto err;
1880                 }
1881         }
1882
1883         id_priv->state = RDMA_CM_CONNECT;
1884         return id_priv;
1885 err:
1886         rdma_destroy_id(id);
1887         return NULL;
1888 }
1889
1890 static void cma_set_req_event_data(struct rdma_cm_event *event,
1891                                    struct ib_cm_req_event_param *req_data,
1892                                    void *private_data, int offset)
1893 {
1894         event->param.conn.private_data = (char *)private_data + offset;
1895         event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1896         event->param.conn.responder_resources = req_data->responder_resources;
1897         event->param.conn.initiator_depth = req_data->initiator_depth;
1898         event->param.conn.flow_control = req_data->flow_control;
1899         event->param.conn.retry_count = req_data->retry_count;
1900         event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1901         event->param.conn.srq = req_data->srq;
1902         event->param.conn.qp_num = req_data->remote_qpn;
1903 }
1904
1905 static int cma_check_req_qp_type(struct rdma_cm_id *id, struct ib_cm_event *ib_event)
1906 {
1907         return (((ib_event->event == IB_CM_REQ_RECEIVED) &&
1908                  (ib_event->param.req_rcvd.qp_type == id->qp_type)) ||
1909                 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) &&
1910                  (id->qp_type == IB_QPT_UD)) ||
1911                 (!id->qp_type));
1912 }
1913
1914 static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1915 {
1916         struct rdma_id_private *listen_id, *conn_id = NULL;
1917         struct rdma_cm_event event;
1918         struct net_device *net_dev;
1919         int offset, ret;
1920
1921         listen_id = cma_id_from_event(cm_id, ib_event, &net_dev);
1922         if (IS_ERR(listen_id))
1923                 return PTR_ERR(listen_id);
1924
1925         if (!cma_check_req_qp_type(&listen_id->id, ib_event)) {
1926                 ret = -EINVAL;
1927                 goto net_dev_put;
1928         }
1929
1930         mutex_lock(&listen_id->handler_mutex);
1931         if (listen_id->state != RDMA_CM_LISTEN) {
1932                 ret = -ECONNABORTED;
1933                 goto err1;
1934         }
1935
1936         memset(&event, 0, sizeof event);
1937         offset = cma_user_data_offset(listen_id);
1938         event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1939         if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) {
1940                 conn_id = cma_new_udp_id(&listen_id->id, ib_event, net_dev);
1941                 event.param.ud.private_data = (char *)ib_event->private_data + offset;
1942                 event.param.ud.private_data_len =
1943                                 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1944         } else {
1945                 conn_id = cma_new_conn_id(&listen_id->id, ib_event, net_dev);
1946                 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1947                                        ib_event->private_data, offset);
1948         }
1949         if (!conn_id) {
1950                 ret = -ENOMEM;
1951                 goto err1;
1952         }
1953
1954         mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
1955         ret = cma_acquire_dev(conn_id, listen_id);
1956         if (ret)
1957                 goto err2;
1958
1959         conn_id->cm_id.ib = cm_id;
1960         cm_id->context = conn_id;
1961         cm_id->cm_handler = cma_ib_handler;
1962
1963         /*
1964          * Protect against the user destroying conn_id from another thread
1965          * until we're done accessing it.
1966          */
1967         atomic_inc(&conn_id->refcount);
1968         ret = conn_id->id.event_handler(&conn_id->id, &event);
1969         if (ret)
1970                 goto err3;
1971         /*
1972          * Acquire mutex to prevent user executing rdma_destroy_id()
1973          * while we're accessing the cm_id.
1974          */
1975         mutex_lock(&lock);
1976         if (cma_comp(conn_id, RDMA_CM_CONNECT) &&
1977             (conn_id->id.qp_type != IB_QPT_UD))
1978                 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1979         mutex_unlock(&lock);
1980         mutex_unlock(&conn_id->handler_mutex);
1981         mutex_unlock(&listen_id->handler_mutex);
1982         cma_deref_id(conn_id);
1983         if (net_dev)
1984                 dev_put(net_dev);
1985         return 0;
1986
1987 err3:
1988         cma_deref_id(conn_id);
1989         /* Destroy the CM ID by returning a non-zero value. */
1990         conn_id->cm_id.ib = NULL;
1991 err2:
1992         cma_exch(conn_id, RDMA_CM_DESTROYING);
1993         mutex_unlock(&conn_id->handler_mutex);
1994 err1:
1995         mutex_unlock(&listen_id->handler_mutex);
1996         if (conn_id)
1997                 rdma_destroy_id(&conn_id->id);
1998
1999 net_dev_put:
2000         if (net_dev)
2001                 dev_put(net_dev);
2002
2003         return ret;
2004 }
2005
2006 __be64 rdma_get_service_id(struct rdma_cm_id *id, struct sockaddr *addr)
2007 {
2008         if (addr->sa_family == AF_IB)
2009                 return ((struct sockaddr_ib *) addr)->sib_sid;
2010
2011         return cpu_to_be64(((u64)id->ps << 16) + be16_to_cpu(cma_port(addr)));
2012 }
2013 EXPORT_SYMBOL(rdma_get_service_id);
2014
2015 static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
2016 {
2017         struct rdma_id_private *id_priv = iw_id->context;
2018         struct rdma_cm_event event;
2019         int ret = 0;
2020         struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
2021         struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
2022
2023         mutex_lock(&id_priv->handler_mutex);
2024         if (id_priv->state != RDMA_CM_CONNECT)
2025                 goto out;
2026
2027         memset(&event, 0, sizeof event);
2028         switch (iw_event->event) {
2029         case IW_CM_EVENT_CLOSE:
2030                 event.event = RDMA_CM_EVENT_DISCONNECTED;
2031                 break;
2032         case IW_CM_EVENT_CONNECT_REPLY:
2033                 memcpy(cma_src_addr(id_priv), laddr,
2034                        rdma_addr_size(laddr));
2035                 memcpy(cma_dst_addr(id_priv), raddr,
2036                        rdma_addr_size(raddr));
2037                 switch (iw_event->status) {
2038                 case 0:
2039                         event.event = RDMA_CM_EVENT_ESTABLISHED;
2040                         event.param.conn.initiator_depth = iw_event->ird;
2041                         event.param.conn.responder_resources = iw_event->ord;
2042                         break;
2043                 case -ECONNRESET:
2044                 case -ECONNREFUSED:
2045                         event.event = RDMA_CM_EVENT_REJECTED;
2046                         break;
2047                 case -ETIMEDOUT:
2048                         event.event = RDMA_CM_EVENT_UNREACHABLE;
2049                         break;
2050                 default:
2051                         event.event = RDMA_CM_EVENT_CONNECT_ERROR;
2052                         break;
2053                 }
2054                 break;
2055         case IW_CM_EVENT_ESTABLISHED:
2056                 event.event = RDMA_CM_EVENT_ESTABLISHED;
2057                 event.param.conn.initiator_depth = iw_event->ird;
2058                 event.param.conn.responder_resources = iw_event->ord;
2059                 break;
2060         default:
2061                 BUG_ON(1);
2062         }
2063
2064         event.status = iw_event->status;
2065         event.param.conn.private_data = iw_event->private_data;
2066         event.param.conn.private_data_len = iw_event->private_data_len;
2067         ret = id_priv->id.event_handler(&id_priv->id, &event);
2068         if (ret) {
2069                 /* Destroy the CM ID by returning a non-zero value. */
2070                 id_priv->cm_id.iw = NULL;
2071                 cma_exch(id_priv, RDMA_CM_DESTROYING);
2072                 mutex_unlock(&id_priv->handler_mutex);
2073                 rdma_destroy_id(&id_priv->id);
2074                 return ret;
2075         }
2076
2077 out:
2078         mutex_unlock(&id_priv->handler_mutex);
2079         return ret;
2080 }
2081
2082 static int iw_conn_req_handler(struct iw_cm_id *cm_id,
2083                                struct iw_cm_event *iw_event)
2084 {
2085         struct rdma_cm_id *new_cm_id;
2086         struct rdma_id_private *listen_id, *conn_id;
2087         struct rdma_cm_event event;
2088         int ret = -ECONNABORTED;
2089         struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
2090         struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
2091
2092         listen_id = cm_id->context;
2093
2094         mutex_lock(&listen_id->handler_mutex);
2095         if (listen_id->state != RDMA_CM_LISTEN)
2096                 goto out;
2097
2098         /* Create a new RDMA id for the new IW CM ID */
2099         new_cm_id = rdma_create_id(listen_id->id.route.addr.dev_addr.net,
2100                                    listen_id->id.event_handler,
2101                                    listen_id->id.context,
2102                                    RDMA_PS_TCP, IB_QPT_RC);
2103         if (IS_ERR(new_cm_id)) {
2104                 ret = -ENOMEM;
2105                 goto out;
2106         }
2107         conn_id = container_of(new_cm_id, struct rdma_id_private, id);
2108         mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
2109         conn_id->state = RDMA_CM_CONNECT;
2110
2111         ret = rdma_translate_ip(laddr, &conn_id->id.route.addr.dev_addr);
2112         if (ret) {
2113                 mutex_unlock(&conn_id->handler_mutex);
2114                 rdma_destroy_id(new_cm_id);
2115                 goto out;
2116         }
2117
2118         ret = cma_acquire_dev(conn_id, listen_id);
2119         if (ret) {
2120                 mutex_unlock(&conn_id->handler_mutex);
2121                 rdma_destroy_id(new_cm_id);
2122                 goto out;
2123         }
2124
2125         conn_id->cm_id.iw = cm_id;
2126         cm_id->context = conn_id;
2127         cm_id->cm_handler = cma_iw_handler;
2128
2129         memcpy(cma_src_addr(conn_id), laddr, rdma_addr_size(laddr));
2130         memcpy(cma_dst_addr(conn_id), raddr, rdma_addr_size(raddr));
2131
2132         memset(&event, 0, sizeof event);
2133         event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
2134         event.param.conn.private_data = iw_event->private_data;
2135         event.param.conn.private_data_len = iw_event->private_data_len;
2136         event.param.conn.initiator_depth = iw_event->ird;
2137         event.param.conn.responder_resources = iw_event->ord;
2138
2139         /*
2140          * Protect against the user destroying conn_id from another thread
2141          * until we're done accessing it.
2142          */
2143         atomic_inc(&conn_id->refcount);
2144         ret = conn_id->id.event_handler(&conn_id->id, &event);
2145         if (ret) {
2146                 /* User wants to destroy the CM ID */
2147                 conn_id->cm_id.iw = NULL;
2148                 cma_exch(conn_id, RDMA_CM_DESTROYING);
2149                 mutex_unlock(&conn_id->handler_mutex);
2150                 cma_deref_id(conn_id);
2151                 rdma_destroy_id(&conn_id->id);
2152                 goto out;
2153         }
2154
2155         mutex_unlock(&conn_id->handler_mutex);
2156         cma_deref_id(conn_id);
2157
2158 out:
2159         mutex_unlock(&listen_id->handler_mutex);
2160         return ret;
2161 }
2162
2163 static int cma_ib_listen(struct rdma_id_private *id_priv)
2164 {
2165         struct sockaddr *addr;
2166         struct ib_cm_id *id;
2167         __be64 svc_id;
2168
2169         addr = cma_src_addr(id_priv);
2170         svc_id = rdma_get_service_id(&id_priv->id, addr);
2171         id = ib_cm_insert_listen(id_priv->id.device, cma_req_handler, svc_id);
2172         if (IS_ERR(id))
2173                 return PTR_ERR(id);
2174         id_priv->cm_id.ib = id;
2175
2176         return 0;
2177 }
2178
2179 static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
2180 {
2181         int ret;
2182         struct iw_cm_id *id;
2183
2184         id = iw_create_cm_id(id_priv->id.device,
2185                              iw_conn_req_handler,
2186                              id_priv);
2187         if (IS_ERR(id))
2188                 return PTR_ERR(id);
2189
2190         id->tos = id_priv->tos;
2191         id_priv->cm_id.iw = id;
2192
2193         memcpy(&id_priv->cm_id.iw->local_addr, cma_src_addr(id_priv),
2194                rdma_addr_size(cma_src_addr(id_priv)));
2195
2196         ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
2197
2198         if (ret) {
2199                 iw_destroy_cm_id(id_priv->cm_id.iw);
2200                 id_priv->cm_id.iw = NULL;
2201         }
2202
2203         return ret;
2204 }
2205
2206 static int cma_listen_handler(struct rdma_cm_id *id,
2207                               struct rdma_cm_event *event)
2208 {
2209         struct rdma_id_private *id_priv = id->context;
2210
2211         id->context = id_priv->id.context;
2212         id->event_handler = id_priv->id.event_handler;
2213         return id_priv->id.event_handler(id, event);
2214 }
2215
2216 static void cma_listen_on_dev(struct rdma_id_private *id_priv,
2217                               struct cma_device *cma_dev)
2218 {
2219         struct rdma_id_private *dev_id_priv;
2220         struct rdma_cm_id *id;
2221         struct vnet *net = id_priv->id.route.addr.dev_addr.net;
2222         int ret;
2223
2224         if (cma_family(id_priv) == AF_IB && !rdma_cap_ib_cm(cma_dev->device, 1))
2225                 return;
2226
2227         id = rdma_create_id(net, cma_listen_handler, id_priv, id_priv->id.ps,
2228                             id_priv->id.qp_type);
2229         if (IS_ERR(id))
2230                 return;
2231
2232         dev_id_priv = container_of(id, struct rdma_id_private, id);
2233
2234         dev_id_priv->state = RDMA_CM_ADDR_BOUND;
2235         memcpy(cma_src_addr(dev_id_priv), cma_src_addr(id_priv),
2236                rdma_addr_size(cma_src_addr(id_priv)));
2237
2238         _cma_attach_to_dev(dev_id_priv, cma_dev);
2239         list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
2240         atomic_inc(&id_priv->refcount);
2241         dev_id_priv->internal_id = 1;
2242         dev_id_priv->afonly = id_priv->afonly;
2243
2244         ret = rdma_listen(id, id_priv->backlog);
2245         if (ret)
2246                 pr_warn("RDMA CMA: cma_listen_on_dev, error %d, listening on device %s\n",
2247                         ret, cma_dev->device->name);
2248 }
2249
2250 static void cma_listen_on_all(struct rdma_id_private *id_priv)
2251 {
2252         struct cma_device *cma_dev;
2253
2254         mutex_lock(&lock);
2255         list_add_tail(&id_priv->list, &listen_any_list);
2256         list_for_each_entry(cma_dev, &dev_list, list)
2257                 cma_listen_on_dev(id_priv, cma_dev);
2258         mutex_unlock(&lock);
2259 }
2260
2261 void rdma_set_service_type(struct rdma_cm_id *id, int tos)
2262 {
2263         struct rdma_id_private *id_priv;
2264
2265         id_priv = container_of(id, struct rdma_id_private, id);
2266         id_priv->tos = (u8) tos;
2267 }
2268 EXPORT_SYMBOL(rdma_set_service_type);
2269
2270 static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
2271                               void *context)
2272 {
2273         struct cma_work *work = context;
2274         struct rdma_route *route;
2275
2276         route = &work->id->id.route;
2277
2278         if (!status) {
2279                 route->num_paths = 1;
2280                 *route->path_rec = *path_rec;
2281         } else {
2282                 work->old_state = RDMA_CM_ROUTE_QUERY;
2283                 work->new_state = RDMA_CM_ADDR_RESOLVED;
2284                 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
2285                 work->event.status = status;
2286         }
2287
2288         queue_work(cma_wq, &work->work);
2289 }
2290
2291 static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
2292                               struct cma_work *work)
2293 {
2294         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2295         struct ib_sa_path_rec path_rec;
2296         ib_sa_comp_mask comp_mask;
2297         struct sockaddr_in6 *sin6;
2298         struct sockaddr_ib *sib;
2299
2300         memset(&path_rec, 0, sizeof path_rec);
2301         rdma_addr_get_sgid(dev_addr, &path_rec.sgid);
2302         rdma_addr_get_dgid(dev_addr, &path_rec.dgid);
2303         path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
2304         path_rec.numb_path = 1;
2305         path_rec.reversible = 1;
2306         path_rec.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
2307
2308         comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
2309                     IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
2310                     IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
2311
2312         switch (cma_family(id_priv)) {
2313         case AF_INET:
2314                 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
2315                 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
2316                 break;
2317         case AF_INET6:
2318                 sin6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
2319                 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
2320                 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
2321                 break;
2322         case AF_IB:
2323                 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
2324                 path_rec.traffic_class = (u8) (be32_to_cpu(sib->sib_flowinfo) >> 20);
2325                 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
2326                 break;
2327         }
2328
2329         id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
2330                                                id_priv->id.port_num, &path_rec,
2331                                                comp_mask, timeout_ms,
2332                                                GFP_KERNEL, cma_query_handler,
2333                                                work, &id_priv->query);
2334
2335         return (id_priv->query_id < 0) ? id_priv->query_id : 0;
2336 }
2337
2338 static void cma_work_handler(struct work_struct *_work)
2339 {
2340         struct cma_work *work = container_of(_work, struct cma_work, work);
2341         struct rdma_id_private *id_priv = work->id;
2342         int destroy = 0;
2343
2344         mutex_lock(&id_priv->handler_mutex);
2345         if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
2346                 goto out;
2347
2348         if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
2349                 cma_exch(id_priv, RDMA_CM_DESTROYING);
2350                 destroy = 1;
2351         }
2352 out:
2353         mutex_unlock(&id_priv->handler_mutex);
2354         cma_deref_id(id_priv);
2355         if (destroy)
2356                 rdma_destroy_id(&id_priv->id);
2357         kfree(work);
2358 }
2359
2360 static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
2361 {
2362         struct rdma_route *route = &id_priv->id.route;
2363         struct cma_work *work;
2364         int ret;
2365
2366         work = kzalloc(sizeof *work, GFP_KERNEL);
2367         if (!work)
2368                 return -ENOMEM;
2369
2370         work->id = id_priv;
2371         INIT_WORK(&work->work, cma_work_handler);
2372         work->old_state = RDMA_CM_ROUTE_QUERY;
2373         work->new_state = RDMA_CM_ROUTE_RESOLVED;
2374         work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2375
2376         route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
2377         if (!route->path_rec) {
2378                 ret = -ENOMEM;
2379                 goto err1;
2380         }
2381
2382         ret = cma_query_ib_route(id_priv, timeout_ms, work);
2383         if (ret)
2384                 goto err2;
2385
2386         return 0;
2387 err2:
2388         kfree(route->path_rec);
2389         route->path_rec = NULL;
2390 err1:
2391         kfree(work);
2392         return ret;
2393 }
2394
2395 int rdma_set_ib_paths(struct rdma_cm_id *id,
2396                       struct ib_sa_path_rec *path_rec, int num_paths)
2397 {
2398         struct rdma_id_private *id_priv;
2399         int ret;
2400
2401         id_priv = container_of(id, struct rdma_id_private, id);
2402         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2403                            RDMA_CM_ROUTE_RESOLVED))
2404                 return -EINVAL;
2405
2406         id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths,
2407                                      GFP_KERNEL);
2408         if (!id->route.path_rec) {
2409                 ret = -ENOMEM;
2410                 goto err;
2411         }
2412
2413         id->route.num_paths = num_paths;
2414         return 0;
2415 err:
2416         cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED);
2417         return ret;
2418 }
2419 EXPORT_SYMBOL(rdma_set_ib_paths);
2420
2421 static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
2422 {
2423         struct cma_work *work;
2424
2425         work = kzalloc(sizeof *work, GFP_KERNEL);
2426         if (!work)
2427                 return -ENOMEM;
2428
2429         work->id = id_priv;
2430         INIT_WORK(&work->work, cma_work_handler);
2431         work->old_state = RDMA_CM_ROUTE_QUERY;
2432         work->new_state = RDMA_CM_ROUTE_RESOLVED;
2433         work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2434         queue_work(cma_wq, &work->work);
2435         return 0;
2436 }
2437
2438 static int iboe_tos_to_sl(struct net_device *ndev, int tos)
2439 {
2440         /* get service level, SL, from type of service, TOS */
2441         int sl = tos;
2442
2443         /* range check input argument and map 1:1 */
2444         if (sl > 255)
2445                 sl = 255;
2446         else if (sl < 0)
2447                 sl = 0;
2448
2449         /* final mappings are done by the vendor specific drivers */
2450         return sl;
2451 }
2452
2453 static enum ib_gid_type cma_route_gid_type(enum rdma_network_type network_type,
2454                                            unsigned long supported_gids,
2455                                            enum ib_gid_type default_gid)
2456 {
2457         if ((network_type == RDMA_NETWORK_IPV4 ||
2458              network_type == RDMA_NETWORK_IPV6) &&
2459             test_bit(IB_GID_TYPE_ROCE_UDP_ENCAP, &supported_gids))
2460                 return IB_GID_TYPE_ROCE_UDP_ENCAP;
2461
2462         return default_gid;
2463 }
2464
2465 static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
2466 {
2467         struct rdma_route *route = &id_priv->id.route;
2468         struct rdma_addr *addr = &route->addr;
2469         struct cma_work *work;
2470         int ret;
2471         struct net_device *ndev = NULL;
2472
2473
2474         work = kzalloc(sizeof *work, GFP_KERNEL);
2475         if (!work)
2476                 return -ENOMEM;
2477
2478         work->id = id_priv;
2479         INIT_WORK(&work->work, cma_work_handler);
2480
2481         route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
2482         if (!route->path_rec) {
2483                 ret = -ENOMEM;
2484                 goto err1;
2485         }
2486
2487         route->num_paths = 1;
2488
2489         if (addr->dev_addr.bound_dev_if) {
2490                 unsigned long supported_gids;
2491
2492                 ndev = dev_get_by_index(addr->dev_addr.net,
2493                                         addr->dev_addr.bound_dev_if);
2494                 if (!ndev) {
2495                         ret = -ENODEV;
2496                         goto err2;
2497                 }
2498
2499                 if (ndev->if_flags & IFF_LOOPBACK) {
2500                         dev_put(ndev);
2501                         if (!id_priv->id.device->get_netdev) {
2502                                 ret = -EOPNOTSUPP;
2503                                 goto err2;
2504                         }
2505
2506                         ndev = id_priv->id.device->get_netdev(id_priv->id.device,
2507                                                               id_priv->id.port_num);
2508                         if (!ndev) {
2509                                 ret = -ENODEV;
2510                                 goto err2;
2511                         }
2512                 }
2513
2514                 route->path_rec->net = ndev->if_vnet;
2515                 route->path_rec->ifindex = ndev->if_index;
2516                 supported_gids = roce_gid_type_mask_support(id_priv->id.device,
2517                                                             id_priv->id.port_num);
2518                 route->path_rec->gid_type =
2519                         cma_route_gid_type(addr->dev_addr.network,
2520                                            supported_gids,
2521                                            id_priv->gid_type);
2522         }
2523         if (!ndev) {
2524                 ret = -ENODEV;
2525                 goto err2;
2526         }
2527
2528         memcpy(route->path_rec->dmac, addr->dev_addr.dst_dev_addr, ETH_ALEN);
2529
2530         rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
2531                     &route->path_rec->sgid);
2532         rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.dst_addr,
2533                     &route->path_rec->dgid);
2534
2535         /* Use the hint from IP Stack to select GID Type */
2536         if (route->path_rec->gid_type < ib_network_to_gid_type(addr->dev_addr.network))
2537                 route->path_rec->gid_type = ib_network_to_gid_type(addr->dev_addr.network);
2538         if (((struct sockaddr *)&id_priv->id.route.addr.dst_addr)->sa_family != AF_IB)
2539                 /* TODO: get the hoplimit from the inet/inet6 device */
2540                 route->path_rec->hop_limit = addr->dev_addr.hoplimit;
2541         else
2542                 route->path_rec->hop_limit = 1;
2543         route->path_rec->reversible = 1;
2544         route->path_rec->pkey = cpu_to_be16(0xffff);
2545         route->path_rec->mtu_selector = IB_SA_EQ;
2546         route->path_rec->sl = iboe_tos_to_sl(ndev, id_priv->tos);
2547         route->path_rec->mtu = iboe_get_mtu(ndev->if_mtu);
2548         route->path_rec->rate_selector = IB_SA_EQ;
2549         route->path_rec->rate = iboe_get_rate(ndev);
2550         dev_put(ndev);
2551         route->path_rec->packet_life_time_selector = IB_SA_EQ;
2552         route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
2553         if (!route->path_rec->mtu) {
2554                 ret = -EINVAL;
2555                 goto err2;
2556         }
2557
2558         work->old_state = RDMA_CM_ROUTE_QUERY;
2559         work->new_state = RDMA_CM_ROUTE_RESOLVED;
2560         work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2561         work->event.status = 0;
2562
2563         queue_work(cma_wq, &work->work);
2564
2565         return 0;
2566
2567 err2:
2568         kfree(route->path_rec);
2569         route->path_rec = NULL;
2570 err1:
2571         kfree(work);
2572         return ret;
2573 }
2574
2575 int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
2576 {
2577         struct rdma_id_private *id_priv;
2578         int ret;
2579
2580         id_priv = container_of(id, struct rdma_id_private, id);
2581         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY))
2582                 return -EINVAL;
2583
2584         atomic_inc(&id_priv->refcount);
2585         if (rdma_cap_ib_sa(id->device, id->port_num))
2586                 ret = cma_resolve_ib_route(id_priv, timeout_ms);
2587         else if (rdma_protocol_roce(id->device, id->port_num))
2588                 ret = cma_resolve_iboe_route(id_priv);
2589         else if (rdma_protocol_iwarp(id->device, id->port_num))
2590                 ret = cma_resolve_iw_route(id_priv, timeout_ms);
2591         else
2592                 ret = -ENOSYS;
2593
2594         if (ret)
2595                 goto err;
2596
2597         return 0;
2598 err:
2599         cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED);
2600         cma_deref_id(id_priv);
2601         return ret;
2602 }
2603 EXPORT_SYMBOL(rdma_resolve_route);
2604
2605 static void cma_set_loopback(struct sockaddr *addr)
2606 {
2607         switch (addr->sa_family) {
2608         case AF_INET:
2609                 ((struct sockaddr_in *) addr)->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
2610                 break;
2611         case AF_INET6:
2612                 ipv6_addr_set(&((struct sockaddr_in6 *) addr)->sin6_addr,
2613                               0, 0, 0, htonl(1));
2614                 break;
2615         default:
2616                 ib_addr_set(&((struct sockaddr_ib *) addr)->sib_addr,
2617                             0, 0, 0, htonl(1));
2618                 break;
2619         }
2620 }
2621
2622 static int cma_bind_loopback(struct rdma_id_private *id_priv)
2623 {
2624         struct cma_device *cma_dev, *cur_dev;
2625         struct ib_port_attr port_attr;
2626         union ib_gid gid;
2627         u16 pkey;
2628         int ret;
2629         u8 p;
2630
2631         cma_dev = NULL;
2632         mutex_lock(&lock);
2633         list_for_each_entry(cur_dev, &dev_list, list) {
2634                 if (cma_family(id_priv) == AF_IB &&
2635                     !rdma_cap_ib_cm(cur_dev->device, 1))
2636                         continue;
2637
2638                 if (!cma_dev)
2639                         cma_dev = cur_dev;
2640
2641                 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
2642                         if (!ib_query_port(cur_dev->device, p, &port_attr) &&
2643                             port_attr.state == IB_PORT_ACTIVE) {
2644                                 cma_dev = cur_dev;
2645                                 goto port_found;
2646                         }
2647                 }
2648         }
2649
2650         if (!cma_dev) {
2651                 ret = -ENODEV;
2652                 goto out;
2653         }
2654
2655         p = 1;
2656
2657 port_found:
2658         ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid, NULL);
2659         if (ret)
2660                 goto out;
2661
2662         ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
2663         if (ret)
2664                 goto out;
2665
2666         id_priv->id.route.addr.dev_addr.dev_type =
2667                 (rdma_protocol_ib(cma_dev->device, p)) ?
2668                 ARPHRD_INFINIBAND : ARPHRD_ETHER;
2669
2670         rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2671         ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
2672         id_priv->id.port_num = p;
2673         cma_attach_to_dev(id_priv, cma_dev);
2674         cma_set_loopback(cma_src_addr(id_priv));
2675 out:
2676         mutex_unlock(&lock);
2677         return ret;
2678 }
2679
2680 static void addr_handler(int status, struct sockaddr *src_addr,
2681                          struct rdma_dev_addr *dev_addr, void *context)
2682 {
2683         struct rdma_id_private *id_priv = context;
2684         struct rdma_cm_event event;
2685
2686         memset(&event, 0, sizeof event);
2687         mutex_lock(&id_priv->handler_mutex);
2688         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY,
2689                            RDMA_CM_ADDR_RESOLVED))
2690                 goto out;
2691
2692         memcpy(cma_src_addr(id_priv), src_addr, rdma_addr_size(src_addr));
2693         if (!status && !id_priv->cma_dev)
2694                 status = cma_acquire_dev(id_priv, NULL);
2695
2696         if (status) {
2697                 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2698                                    RDMA_CM_ADDR_BOUND))
2699                         goto out;
2700                 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2701                 event.status = status;
2702         } else
2703                 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2704
2705         if (id_priv->id.event_handler(&id_priv->id, &event)) {
2706                 cma_exch(id_priv, RDMA_CM_DESTROYING);
2707                 mutex_unlock(&id_priv->handler_mutex);
2708                 cma_deref_id(id_priv);
2709                 rdma_destroy_id(&id_priv->id);
2710                 return;
2711         }
2712 out:
2713         mutex_unlock(&id_priv->handler_mutex);
2714         cma_deref_id(id_priv);
2715 }
2716
2717 static int cma_resolve_loopback(struct rdma_id_private *id_priv)
2718 {
2719         struct cma_work *work;
2720         union ib_gid gid;
2721         int ret;
2722
2723         work = kzalloc(sizeof *work, GFP_KERNEL);
2724         if (!work)
2725                 return -ENOMEM;
2726
2727         if (!id_priv->cma_dev) {
2728                 ret = cma_bind_loopback(id_priv);
2729                 if (ret)
2730                         goto err;
2731         }
2732
2733         rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2734         rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
2735
2736         work->id = id_priv;
2737         INIT_WORK(&work->work, cma_work_handler);
2738         work->old_state = RDMA_CM_ADDR_QUERY;
2739         work->new_state = RDMA_CM_ADDR_RESOLVED;
2740         work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2741         queue_work(cma_wq, &work->work);
2742         return 0;
2743 err:
2744         kfree(work);
2745         return ret;
2746 }
2747
2748 static int cma_resolve_ib_addr(struct rdma_id_private *id_priv)
2749 {
2750         struct cma_work *work;
2751         int ret;
2752
2753         work = kzalloc(sizeof *work, GFP_KERNEL);
2754         if (!work)
2755                 return -ENOMEM;
2756
2757         if (!id_priv->cma_dev) {
2758                 ret = cma_resolve_ib_dev(id_priv);
2759                 if (ret)
2760                         goto err;
2761         }
2762
2763         rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, (union ib_gid *)
2764                 &(((struct sockaddr_ib *) &id_priv->id.route.addr.dst_addr)->sib_addr));
2765
2766         work->id = id_priv;
2767         INIT_WORK(&work->work, cma_work_handler);
2768         work->old_state = RDMA_CM_ADDR_QUERY;
2769         work->new_state = RDMA_CM_ADDR_RESOLVED;
2770         work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2771         queue_work(cma_wq, &work->work);
2772         return 0;
2773 err:
2774         kfree(work);
2775         return ret;
2776 }
2777
2778 static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2779                          struct sockaddr *dst_addr)
2780 {
2781         if (!src_addr || !src_addr->sa_family) {
2782                 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
2783                 src_addr->sa_family = dst_addr->sa_family;
2784                 if (dst_addr->sa_family == AF_INET6) {
2785                         struct sockaddr_in6 *src_addr6 = (struct sockaddr_in6 *) src_addr;
2786                         struct sockaddr_in6 *dst_addr6 = (struct sockaddr_in6 *) dst_addr;
2787                         src_addr6->sin6_scope_id = dst_addr6->sin6_scope_id;
2788                         if (IN6_IS_SCOPE_LINKLOCAL(&dst_addr6->sin6_addr) ||
2789                             IN6_IS_ADDR_MC_INTFACELOCAL(&dst_addr6->sin6_addr))
2790                                 id->route.addr.dev_addr.bound_dev_if = dst_addr6->sin6_scope_id;
2791                 } else if (dst_addr->sa_family == AF_IB) {
2792                         ((struct sockaddr_ib *) src_addr)->sib_pkey =
2793                                 ((struct sockaddr_ib *) dst_addr)->sib_pkey;
2794                 }
2795         }
2796         return rdma_bind_addr(id, src_addr);
2797 }
2798
2799 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2800                       struct sockaddr *dst_addr, int timeout_ms)
2801 {
2802         struct rdma_id_private *id_priv;
2803         int ret;
2804
2805         id_priv = container_of(id, struct rdma_id_private, id);
2806         if (id_priv->state == RDMA_CM_IDLE) {
2807                 ret = cma_bind_addr(id, src_addr, dst_addr);
2808                 if (ret)
2809                         return ret;
2810         }
2811
2812         if (cma_family(id_priv) != dst_addr->sa_family)
2813                 return -EINVAL;
2814
2815         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY))
2816                 return -EINVAL;
2817
2818         atomic_inc(&id_priv->refcount);
2819         memcpy(cma_dst_addr(id_priv), dst_addr, rdma_addr_size(dst_addr));
2820         if (cma_any_addr(dst_addr)) {
2821                 ret = cma_resolve_loopback(id_priv);
2822         } else {
2823                 if (dst_addr->sa_family == AF_IB) {
2824                         ret = cma_resolve_ib_addr(id_priv);
2825                 } else {
2826                         ret = cma_check_linklocal(&id->route.addr.dev_addr, dst_addr);
2827                         if (ret)
2828                                 goto err;
2829
2830                         ret = rdma_resolve_ip(&addr_client, cma_src_addr(id_priv),
2831                                               dst_addr, &id->route.addr.dev_addr,
2832                                               timeout_ms, addr_handler, id_priv);
2833                 }
2834         }
2835         if (ret)
2836                 goto err;
2837
2838         return 0;
2839 err:
2840         cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
2841         cma_deref_id(id_priv);
2842         return ret;
2843 }
2844 EXPORT_SYMBOL(rdma_resolve_addr);
2845
2846 int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
2847 {
2848         struct rdma_id_private *id_priv;
2849         unsigned long flags;
2850         int ret;
2851
2852         id_priv = container_of(id, struct rdma_id_private, id);
2853         spin_lock_irqsave(&id_priv->lock, flags);
2854         if (reuse || id_priv->state == RDMA_CM_IDLE) {
2855                 id_priv->reuseaddr = reuse;
2856                 ret = 0;
2857         } else {
2858                 ret = -EINVAL;
2859         }
2860         spin_unlock_irqrestore(&id_priv->lock, flags);
2861         return ret;
2862 }
2863 EXPORT_SYMBOL(rdma_set_reuseaddr);
2864
2865 int rdma_set_afonly(struct rdma_cm_id *id, int afonly)
2866 {
2867         struct rdma_id_private *id_priv;
2868         unsigned long flags;
2869         int ret;
2870
2871         id_priv = container_of(id, struct rdma_id_private, id);
2872         spin_lock_irqsave(&id_priv->lock, flags);
2873         if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) {
2874                 id_priv->options |= (1 << CMA_OPTION_AFONLY);
2875                 id_priv->afonly = afonly;
2876                 ret = 0;
2877         } else {
2878                 ret = -EINVAL;
2879         }
2880         spin_unlock_irqrestore(&id_priv->lock, flags);
2881         return ret;
2882 }
2883 EXPORT_SYMBOL(rdma_set_afonly);
2884
2885 static void cma_bind_port(struct rdma_bind_list *bind_list,
2886                           struct rdma_id_private *id_priv)
2887 {
2888         struct sockaddr *addr;
2889         struct sockaddr_ib *sib;
2890         u64 sid, mask;
2891         __be16 port;
2892
2893         addr = cma_src_addr(id_priv);
2894         port = htons(bind_list->port);
2895
2896         switch (addr->sa_family) {
2897         case AF_INET:
2898                 ((struct sockaddr_in *) addr)->sin_port = port;
2899                 break;
2900         case AF_INET6:
2901                 ((struct sockaddr_in6 *) addr)->sin6_port = port;
2902                 break;
2903         case AF_IB:
2904                 sib = (struct sockaddr_ib *) addr;
2905                 sid = be64_to_cpu(sib->sib_sid);
2906                 mask = be64_to_cpu(sib->sib_sid_mask);
2907                 sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port));
2908                 sib->sib_sid_mask = cpu_to_be64(~0ULL);
2909                 break;
2910         }
2911         id_priv->bind_list = bind_list;
2912         hlist_add_head(&id_priv->node, &bind_list->owners);
2913 }
2914
2915 static int cma_alloc_port(enum rdma_port_space ps,
2916                           struct rdma_id_private *id_priv, unsigned short snum)
2917 {
2918         struct rdma_bind_list *bind_list;
2919         int ret;
2920
2921         bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
2922         if (!bind_list)
2923                 return -ENOMEM;
2924
2925         ret = cma_ps_alloc(id_priv->id.route.addr.dev_addr.net, ps, bind_list,
2926                            snum);
2927         if (ret < 0)
2928                 goto err;
2929
2930         bind_list->ps = ps;
2931         bind_list->port = (unsigned short)ret;
2932         cma_bind_port(bind_list, id_priv);
2933         return 0;
2934 err:
2935         kfree(bind_list);
2936         return ret == -ENOSPC ? -EADDRNOTAVAIL : ret;
2937 }
2938
2939 static int cma_alloc_any_port(enum rdma_port_space ps,
2940                               struct rdma_id_private *id_priv)
2941 {
2942         static unsigned int last_used_port;
2943         int low, high, remaining;
2944         unsigned int rover;
2945         struct vnet *net = id_priv->id.route.addr.dev_addr.net;
2946         u32 rand;
2947
2948         inet_get_local_port_range(net, &low, &high);
2949         remaining = (high - low) + 1;
2950         get_random_bytes(&rand, sizeof(rand));
2951         rover = rand % remaining + low;
2952 retry:
2953         if (last_used_port != rover &&
2954             !cma_ps_find(net, ps, (unsigned short)rover)) {
2955                 int ret = cma_alloc_port(ps, id_priv, rover);
2956                 /*
2957                  * Remember previously used port number in order to avoid
2958                  * re-using same port immediately after it is closed.
2959                  */
2960                 if (!ret)
2961                         last_used_port = rover;
2962                 if (ret != -EADDRNOTAVAIL)
2963                         return ret;
2964         }
2965         if (--remaining) {
2966                 rover++;
2967                 if ((rover < low) || (rover > high))
2968                         rover = low;
2969                 goto retry;
2970         }
2971         return -EADDRNOTAVAIL;
2972 }
2973
2974 /*
2975  * Check that the requested port is available.  This is called when trying to
2976  * bind to a specific port, or when trying to listen on a bound port.  In
2977  * the latter case, the provided id_priv may already be on the bind_list, but
2978  * we still need to check that it's okay to start listening.
2979  */
2980 static int cma_check_port(struct rdma_bind_list *bind_list,
2981                           struct rdma_id_private *id_priv, uint8_t reuseaddr)
2982 {
2983         struct rdma_id_private *cur_id;
2984         struct sockaddr *addr, *cur_addr;
2985
2986         addr = cma_src_addr(id_priv);
2987         hlist_for_each_entry(cur_id, &bind_list->owners, node) {
2988                 if (id_priv == cur_id)
2989                         continue;
2990
2991                 if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr &&
2992                     cur_id->reuseaddr)
2993                         continue;
2994
2995                 cur_addr = cma_src_addr(cur_id);
2996                 if (id_priv->afonly && cur_id->afonly &&
2997                     (addr->sa_family != cur_addr->sa_family))
2998                         continue;
2999
3000                 if (cma_any_addr(addr) || cma_any_addr(cur_addr))
3001                         return -EADDRNOTAVAIL;
3002
3003                 if (!cma_addr_cmp(addr, cur_addr))
3004                         return -EADDRINUSE;
3005         }
3006         return 0;
3007 }
3008
3009 static int cma_use_port(enum rdma_port_space ps,
3010                         struct rdma_id_private *id_priv)
3011 {
3012         struct rdma_bind_list *bind_list;
3013         unsigned short snum;
3014         int ret;
3015
3016         snum = ntohs(cma_port(cma_src_addr(id_priv)));
3017         if (snum < IPPORT_RESERVED &&
3018             priv_check(curthread, PRIV_NETINET_BINDANY) != 0)
3019                 return -EACCES;
3020
3021         bind_list = cma_ps_find(id_priv->id.route.addr.dev_addr.net, ps, snum);
3022         if (!bind_list) {
3023                 ret = cma_alloc_port(ps, id_priv, snum);
3024         } else {
3025                 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
3026                 if (!ret)
3027                         cma_bind_port(bind_list, id_priv);
3028         }
3029         return ret;
3030 }
3031
3032 static int cma_bind_listen(struct rdma_id_private *id_priv)
3033 {
3034         struct rdma_bind_list *bind_list = id_priv->bind_list;
3035         int ret = 0;
3036
3037         mutex_lock(&lock);
3038         if (bind_list->owners.first->next)
3039                 ret = cma_check_port(bind_list, id_priv, 0);
3040         mutex_unlock(&lock);
3041         return ret;
3042 }
3043
3044 static enum rdma_port_space cma_select_inet_ps(
3045                 struct rdma_id_private *id_priv)
3046 {
3047         switch (id_priv->id.ps) {
3048         case RDMA_PS_TCP:
3049         case RDMA_PS_UDP:
3050         case RDMA_PS_IPOIB:
3051         case RDMA_PS_IB:
3052                 return id_priv->id.ps;
3053         default:
3054
3055                 return 0;
3056         }
3057 }
3058
3059 static enum rdma_port_space cma_select_ib_ps(struct rdma_id_private *id_priv)
3060 {
3061         enum rdma_port_space ps = 0;
3062         struct sockaddr_ib *sib;
3063         u64 sid_ps, mask, sid;
3064
3065         sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
3066         mask = be64_to_cpu(sib->sib_sid_mask) & RDMA_IB_IP_PS_MASK;
3067         sid = be64_to_cpu(sib->sib_sid) & mask;
3068
3069         if ((id_priv->id.ps == RDMA_PS_IB) && (sid == (RDMA_IB_IP_PS_IB & mask))) {
3070                 sid_ps = RDMA_IB_IP_PS_IB;
3071                 ps = RDMA_PS_IB;
3072         } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_TCP)) &&
3073                    (sid == (RDMA_IB_IP_PS_TCP & mask))) {
3074                 sid_ps = RDMA_IB_IP_PS_TCP;
3075                 ps = RDMA_PS_TCP;
3076         } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_UDP)) &&
3077                    (sid == (RDMA_IB_IP_PS_UDP & mask))) {
3078                 sid_ps = RDMA_IB_IP_PS_UDP;
3079                 ps = RDMA_PS_UDP;
3080         }
3081
3082         if (ps) {
3083                 sib->sib_sid = cpu_to_be64(sid_ps | ntohs(cma_port((struct sockaddr *) sib)));
3084                 sib->sib_sid_mask = cpu_to_be64(RDMA_IB_IP_PS_MASK |
3085                                                 be64_to_cpu(sib->sib_sid_mask));
3086         }
3087         return ps;
3088 }
3089
3090 static int cma_get_port(struct rdma_id_private *id_priv)
3091 {
3092         enum rdma_port_space ps;
3093         int ret;
3094
3095         if (cma_family(id_priv) != AF_IB)
3096                 ps = cma_select_inet_ps(id_priv);
3097         else
3098                 ps = cma_select_ib_ps(id_priv);
3099         if (!ps)
3100                 return -EPROTONOSUPPORT;
3101
3102         mutex_lock(&lock);
3103         if (cma_any_port(cma_src_addr(id_priv)))
3104                 ret = cma_alloc_any_port(ps, id_priv);
3105         else
3106                 ret = cma_use_port(ps, id_priv);
3107         mutex_unlock(&lock);
3108
3109         return ret;
3110 }
3111
3112 static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
3113                                struct sockaddr *addr)
3114 {
3115 #ifdef INET6
3116         struct sockaddr_in6 sin6;
3117
3118         if (addr->sa_family != AF_INET6)
3119                 return 0;
3120
3121         sin6 = *(struct sockaddr_in6 *)addr;
3122
3123         if (IN6_IS_SCOPE_LINKLOCAL(&sin6.sin6_addr) ||
3124             IN6_IS_ADDR_MC_INTFACELOCAL(&sin6.sin6_addr)) {
3125                 bool failure;
3126
3127                 CURVNET_SET_QUIET(dev_addr->net);
3128                 failure = sa6_recoverscope(&sin6) || sin6.sin6_scope_id == 0;
3129                 CURVNET_RESTORE();
3130
3131                 /* check if IPv6 scope ID is not set */
3132                 if (failure)
3133                         return -EINVAL;
3134                 dev_addr->bound_dev_if = sin6.sin6_scope_id;
3135         }
3136 #endif
3137         return 0;
3138 }
3139
3140 int rdma_listen(struct rdma_cm_id *id, int backlog)
3141 {
3142         struct rdma_id_private *id_priv;
3143         int ret;
3144
3145         id_priv = container_of(id, struct rdma_id_private, id);
3146         if (id_priv->state == RDMA_CM_IDLE) {
3147                 id->route.addr.src_addr.ss_family = AF_INET;
3148                 ret = rdma_bind_addr(id, cma_src_addr(id_priv));
3149                 if (ret)
3150                         return ret;
3151         }
3152
3153         if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN))
3154                 return -EINVAL;
3155
3156         if (id_priv->reuseaddr) {
3157                 ret = cma_bind_listen(id_priv);
3158                 if (ret)
3159                         goto err;
3160         }
3161
3162         id_priv->backlog = backlog;
3163         if (id->device) {
3164                 if (rdma_cap_ib_cm(id->device, 1)) {
3165                         ret = cma_ib_listen(id_priv);
3166                         if (ret)
3167                                 goto err;
3168                 } else if (rdma_cap_iw_cm(id->device, 1)) {
3169                         ret = cma_iw_listen(id_priv, backlog);
3170                         if (ret)
3171                                 goto err;
3172                 } else {
3173                         ret = -ENOSYS;
3174                         goto err;
3175                 }
3176         } else
3177                 cma_listen_on_all(id_priv);
3178
3179         return 0;
3180 err:
3181         id_priv->backlog = 0;
3182         cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND);
3183         return ret;
3184 }
3185 EXPORT_SYMBOL(rdma_listen);
3186
3187 int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
3188 {
3189         struct rdma_id_private *id_priv;
3190         int ret;
3191
3192         if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6 &&
3193             addr->sa_family != AF_IB)
3194                 return -EAFNOSUPPORT;
3195
3196         id_priv = container_of(id, struct rdma_id_private, id);
3197         if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND))
3198                 return -EINVAL;
3199
3200         ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
3201         if (ret)
3202                 goto err1;
3203
3204         memcpy(cma_src_addr(id_priv), addr, rdma_addr_size(addr));
3205         if (!cma_any_addr(addr)) {
3206                 ret = cma_translate_addr(addr, &id->route.addr.dev_addr);
3207                 if (ret)
3208                         goto err1;
3209
3210                 ret = cma_acquire_dev(id_priv, NULL);
3211                 if (ret)
3212                         goto err1;
3213         }
3214
3215         if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) {
3216                 if (addr->sa_family == AF_INET)
3217                         id_priv->afonly = 1;
3218 #ifdef INET6
3219                 else if (addr->sa_family == AF_INET6) {
3220                         CURVNET_SET_QUIET(id_priv->id.route.addr.dev_addr.net);
3221                         id_priv->afonly = V_ip6_v6only;
3222                         CURVNET_RESTORE();
3223                 }
3224 #endif
3225         }
3226         ret = cma_get_port(id_priv);
3227         if (ret)
3228                 goto err2;
3229
3230         return 0;
3231 err2:
3232         if (id_priv->cma_dev)
3233                 cma_release_dev(id_priv);
3234 err1:
3235         cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE);
3236         return ret;
3237 }
3238 EXPORT_SYMBOL(rdma_bind_addr);
3239
3240 static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv)
3241 {
3242         struct cma_hdr *cma_hdr;
3243
3244         cma_hdr = hdr;
3245         cma_hdr->cma_version = CMA_VERSION;
3246         if (cma_family(id_priv) == AF_INET) {
3247                 struct sockaddr_in *src4, *dst4;
3248
3249                 src4 = (struct sockaddr_in *) cma_src_addr(id_priv);
3250                 dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv);
3251
3252                 cma_set_ip_ver(cma_hdr, 4);
3253                 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
3254                 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
3255                 cma_hdr->port = src4->sin_port;
3256         } else if (cma_family(id_priv) == AF_INET6) {
3257                 struct sockaddr_in6 *src6, *dst6;
3258
3259                 src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
3260                 dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv);
3261
3262                 cma_set_ip_ver(cma_hdr, 6);
3263                 cma_hdr->src_addr.ip6 = src6->sin6_addr;
3264                 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
3265                 cma_hdr->port = src6->sin6_port;
3266                 cma_ip6_clear_scope_id(&cma_hdr->src_addr.ip6);
3267                 cma_ip6_clear_scope_id(&cma_hdr->dst_addr.ip6);
3268         }
3269         return 0;
3270 }
3271
3272 static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
3273                                 struct ib_cm_event *ib_event)
3274 {
3275         struct rdma_id_private *id_priv = cm_id->context;
3276         struct rdma_cm_event event;
3277         struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
3278         int ret = 0;
3279
3280         mutex_lock(&id_priv->handler_mutex);
3281         if (id_priv->state != RDMA_CM_CONNECT)
3282                 goto out;
3283
3284         memset(&event, 0, sizeof event);
3285         switch (ib_event->event) {
3286         case IB_CM_SIDR_REQ_ERROR:
3287                 event.event = RDMA_CM_EVENT_UNREACHABLE;
3288                 event.status = -ETIMEDOUT;
3289                 break;
3290         case IB_CM_SIDR_REP_RECEIVED:
3291                 event.param.ud.private_data = ib_event->private_data;
3292                 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
3293                 if (rep->status != IB_SIDR_SUCCESS) {
3294                         event.event = RDMA_CM_EVENT_UNREACHABLE;
3295                         event.status = ib_event->param.sidr_rep_rcvd.status;
3296                         break;
3297                 }
3298                 ret = cma_set_qkey(id_priv, rep->qkey);
3299                 if (ret) {
3300                         event.event = RDMA_CM_EVENT_ADDR_ERROR;
3301                         event.status = ret;
3302                         break;
3303                 }
3304                 ret = ib_init_ah_from_path(id_priv->id.device,
3305                                            id_priv->id.port_num,
3306                                            id_priv->id.route.path_rec,
3307                                            &event.param.ud.ah_attr);
3308                 if (ret) {
3309                         event.event = RDMA_CM_EVENT_ADDR_ERROR;
3310                         event.status = ret;
3311                         break;
3312                 }
3313                 event.param.ud.qp_num = rep->qpn;
3314                 event.param.ud.qkey = rep->qkey;
3315                 event.event = RDMA_CM_EVENT_ESTABLISHED;
3316                 event.status = 0;
3317                 break;
3318         default:
3319                 pr_err("RDMA CMA: unexpected IB CM event: %d\n",
3320                        ib_event->event);
3321                 goto out;
3322         }
3323
3324         ret = id_priv->id.event_handler(&id_priv->id, &event);
3325         if (ret) {
3326                 /* Destroy the CM ID by returning a non-zero value. */
3327                 id_priv->cm_id.ib = NULL;
3328                 cma_exch(id_priv, RDMA_CM_DESTROYING);
3329                 mutex_unlock(&id_priv->handler_mutex);
3330                 rdma_destroy_id(&id_priv->id);
3331                 return ret;
3332         }
3333 out:
3334         mutex_unlock(&id_priv->handler_mutex);
3335         return ret;
3336 }
3337
3338 static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
3339                               struct rdma_conn_param *conn_param)
3340 {
3341         struct ib_cm_sidr_req_param req;
3342         struct ib_cm_id *id;
3343         void *private_data;
3344         int offset, ret;
3345
3346         memset(&req, 0, sizeof req);
3347         offset = cma_user_data_offset(id_priv);
3348         req.private_data_len = offset + conn_param->private_data_len;
3349         if (req.private_data_len < conn_param->private_data_len)
3350                 return -EINVAL;
3351
3352         if (req.private_data_len) {
3353                 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
3354                 if (!private_data)
3355                         return -ENOMEM;
3356         } else {
3357                 private_data = NULL;
3358         }
3359
3360         if (conn_param->private_data && conn_param->private_data_len)
3361                 memcpy((char *)private_data + offset, conn_param->private_data,
3362                        conn_param->private_data_len);
3363
3364         if (private_data) {
3365                 ret = cma_format_hdr(private_data, id_priv);
3366                 if (ret)
3367                         goto out;
3368                 req.private_data = private_data;
3369         }
3370
3371         id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler,
3372                              id_priv);
3373         if (IS_ERR(id)) {
3374                 ret = PTR_ERR(id);
3375                 goto out;
3376         }
3377         id_priv->cm_id.ib = id;
3378
3379         req.path = id_priv->id.route.path_rec;
3380         req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
3381         req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
3382         req.max_cm_retries = CMA_MAX_CM_RETRIES;
3383
3384         ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
3385         if (ret) {
3386                 ib_destroy_cm_id(id_priv->cm_id.ib);
3387                 id_priv->cm_id.ib = NULL;
3388         }
3389 out:
3390         kfree(private_data);
3391         return ret;
3392 }
3393
3394 static int cma_connect_ib(struct rdma_id_private *id_priv,
3395                           struct rdma_conn_param *conn_param)
3396 {
3397         struct ib_cm_req_param req;
3398         struct rdma_route *route;
3399         void *private_data;
3400         struct ib_cm_id *id;
3401         int offset, ret;
3402
3403         memset(&req, 0, sizeof req);
3404         offset = cma_user_data_offset(id_priv);
3405         req.private_data_len = offset + conn_param->private_data_len;
3406         if (req.private_data_len < conn_param->private_data_len)
3407                 return -EINVAL;
3408
3409         if (req.private_data_len) {
3410                 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
3411                 if (!private_data)
3412                         return -ENOMEM;
3413         } else {
3414                 private_data = NULL;
3415         }
3416
3417         if (conn_param->private_data && conn_param->private_data_len)
3418                 memcpy((char *)private_data + offset, conn_param->private_data,
3419                        conn_param->private_data_len);
3420
3421         id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv);
3422         if (IS_ERR(id)) {
3423                 ret = PTR_ERR(id);
3424                 goto out;
3425         }
3426         id_priv->cm_id.ib = id;
3427
3428         route = &id_priv->id.route;
3429         if (private_data) {
3430                 ret = cma_format_hdr(private_data, id_priv);
3431                 if (ret)
3432                         goto out;
3433                 req.private_data = private_data;
3434         }
3435
3436         req.primary_path = &route->path_rec[0];
3437         if (route->num_paths == 2)
3438                 req.alternate_path = &route->path_rec[1];
3439
3440         req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
3441         req.qp_num = id_priv->qp_num;
3442         req.qp_type = id_priv->id.qp_type;
3443         req.starting_psn = id_priv->seq_num;
3444         req.responder_resources = conn_param->responder_resources;
3445         req.initiator_depth = conn_param->initiator_depth;
3446         req.flow_control = conn_param->flow_control;
3447         req.retry_count = min_t(u8, 7, conn_param->retry_count);
3448         req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
3449         req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
3450         req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
3451         req.max_cm_retries = CMA_MAX_CM_RETRIES;
3452         req.srq = id_priv->srq ? 1 : 0;
3453
3454         ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
3455 out:
3456         if (ret && !IS_ERR(id)) {
3457                 ib_destroy_cm_id(id);
3458                 id_priv->cm_id.ib = NULL;
3459         }
3460
3461         kfree(private_data);
3462         return ret;
3463 }
3464
3465 static int cma_connect_iw(struct rdma_id_private *id_priv,
3466                           struct rdma_conn_param *conn_param)
3467 {
3468         struct iw_cm_id *cm_id;
3469         int ret;
3470         struct iw_cm_conn_param iw_param;
3471
3472         cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
3473         if (IS_ERR(cm_id))
3474                 return PTR_ERR(cm_id);
3475
3476         cm_id->tos = id_priv->tos;
3477         id_priv->cm_id.iw = cm_id;
3478
3479         memcpy(&cm_id->local_addr, cma_src_addr(id_priv),
3480                rdma_addr_size(cma_src_addr(id_priv)));
3481         memcpy(&cm_id->remote_addr, cma_dst_addr(id_priv),
3482                rdma_addr_size(cma_dst_addr(id_priv)));
3483
3484         ret = cma_modify_qp_rtr(id_priv, conn_param);
3485         if (ret)
3486                 goto out;
3487
3488         if (conn_param) {
3489                 iw_param.ord = conn_param->initiator_depth;
3490                 iw_param.ird = conn_param->responder_resources;
3491                 iw_param.private_data = conn_param->private_data;
3492                 iw_param.private_data_len = conn_param->private_data_len;
3493                 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num;
3494         } else {
3495                 memset(&iw_param, 0, sizeof iw_param);
3496                 iw_param.qpn = id_priv->qp_num;
3497         }
3498         ret = iw_cm_connect(cm_id, &iw_param);
3499 out:
3500         if (ret) {
3501                 iw_destroy_cm_id(cm_id);
3502                 id_priv->cm_id.iw = NULL;
3503         }
3504         return ret;
3505 }
3506
3507 int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
3508 {
3509         struct rdma_id_private *id_priv;
3510         int ret;
3511
3512         id_priv = container_of(id, struct rdma_id_private, id);
3513         if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT))
3514                 return -EINVAL;
3515
3516         if (!id->qp) {
3517                 id_priv->qp_num = conn_param->qp_num;
3518                 id_priv->srq = conn_param->srq;
3519         }
3520
3521         if (rdma_cap_ib_cm(id->device, id->port_num)) {
3522                 if (id->qp_type == IB_QPT_UD)
3523                         ret = cma_resolve_ib_udp(id_priv, conn_param);
3524                 else
3525                         ret = cma_connect_ib(id_priv, conn_param);
3526         } else if (rdma_cap_iw_cm(id->device, id->port_num))
3527                 ret = cma_connect_iw(id_priv, conn_param);
3528         else
3529                 ret = -ENOSYS;
3530         if (ret)
3531                 goto err;
3532
3533         return 0;
3534 err:
3535         cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED);
3536         return ret;
3537 }
3538 EXPORT_SYMBOL(rdma_connect);
3539
3540 static int cma_accept_ib(struct rdma_id_private *id_priv,
3541                          struct rdma_conn_param *conn_param)
3542 {
3543         struct ib_cm_rep_param rep;
3544         int ret;
3545
3546         ret = cma_modify_qp_rtr(id_priv, conn_param);
3547         if (ret)
3548                 goto out;
3549
3550         ret = cma_modify_qp_rts(id_priv, conn_param);
3551         if (ret)
3552                 goto out;
3553
3554         memset(&rep, 0, sizeof rep);
3555         rep.qp_num = id_priv->qp_num;
3556         rep.starting_psn = id_priv->seq_num;
3557         rep.private_data = conn_param->private_data;
3558         rep.private_data_len = conn_param->private_data_len;
3559         rep.responder_resources = conn_param->responder_resources;
3560         rep.initiator_depth = conn_param->initiator_depth;
3561         rep.failover_accepted = 0;
3562         rep.flow_control = conn_param->flow_control;
3563         rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
3564         rep.srq = id_priv->srq ? 1 : 0;
3565
3566         ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
3567 out:
3568         return ret;
3569 }
3570
3571 static int cma_accept_iw(struct rdma_id_private *id_priv,
3572                   struct rdma_conn_param *conn_param)
3573 {
3574         struct iw_cm_conn_param iw_param;
3575         int ret;
3576
3577         ret = cma_modify_qp_rtr(id_priv, conn_param);
3578         if (ret)
3579                 return ret;
3580
3581         iw_param.ord = conn_param->initiator_depth;
3582         iw_param.ird = conn_param->responder_resources;
3583         iw_param.private_data = conn_param->private_data;
3584         iw_param.private_data_len = conn_param->private_data_len;
3585         if (id_priv->id.qp) {
3586                 iw_param.qpn = id_priv->qp_num;
3587         } else
3588                 iw_param.qpn = conn_param->qp_num;
3589
3590         return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
3591 }
3592
3593 static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
3594                              enum ib_cm_sidr_status status, u32 qkey,
3595                              const void *private_data, int private_data_len)
3596 {
3597         struct ib_cm_sidr_rep_param rep;
3598         int ret;
3599
3600         memset(&rep, 0, sizeof rep);
3601         rep.status = status;
3602         if (status == IB_SIDR_SUCCESS) {
3603                 ret = cma_set_qkey(id_priv, qkey);
3604                 if (ret)
3605                         return ret;
3606                 rep.qp_num = id_priv->qp_num;
3607                 rep.qkey = id_priv->qkey;
3608         }
3609         rep.private_data = private_data;
3610         rep.private_data_len = private_data_len;
3611
3612         return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
3613 }
3614
3615 int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
3616 {
3617         struct rdma_id_private *id_priv;
3618         int ret;
3619
3620         id_priv = container_of(id, struct rdma_id_private, id);
3621
3622         id_priv->owner = task_pid_nr(current);
3623
3624         if (!cma_comp(id_priv, RDMA_CM_CONNECT))
3625                 return -EINVAL;
3626
3627         if (!id->qp && conn_param) {
3628                 id_priv->qp_num = conn_param->qp_num;
3629                 id_priv->srq = conn_param->srq;
3630         }
3631
3632         if (rdma_cap_ib_cm(id->device, id->port_num)) {
3633                 if (id->qp_type == IB_QPT_UD) {
3634                         if (conn_param)
3635                                 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
3636                                                         conn_param->qkey,
3637                                                         conn_param->private_data,
3638                                                         conn_param->private_data_len);
3639                         else
3640                                 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
3641                                                         0, NULL, 0);
3642                 } else {
3643                         if (conn_param)
3644                                 ret = cma_accept_ib(id_priv, conn_param);
3645                         else
3646                                 ret = cma_rep_recv(id_priv);
3647                 }
3648         } else if (rdma_cap_iw_cm(id->device, id->port_num))
3649                 ret = cma_accept_iw(id_priv, conn_param);
3650         else
3651                 ret = -ENOSYS;
3652
3653         if (ret)
3654                 goto reject;
3655
3656         return 0;
3657 reject:
3658         cma_modify_qp_err(id_priv);
3659         rdma_reject(id, NULL, 0);
3660         return ret;
3661 }
3662 EXPORT_SYMBOL(rdma_accept);
3663
3664 int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
3665 {
3666         struct rdma_id_private *id_priv;
3667         int ret;
3668
3669         id_priv = container_of(id, struct rdma_id_private, id);
3670         if (!id_priv->cm_id.ib)
3671                 return -EINVAL;
3672
3673         switch (id->device->node_type) {
3674         case RDMA_NODE_IB_CA:
3675                 ret = ib_cm_notify(id_priv->cm_id.ib, event);
3676                 break;
3677         default:
3678                 ret = 0;
3679                 break;
3680         }
3681         return ret;
3682 }
3683 EXPORT_SYMBOL(rdma_notify);
3684
3685 int rdma_reject(struct rdma_cm_id *id, const void *private_data,
3686                 u8 private_data_len)
3687 {
3688         struct rdma_id_private *id_priv;
3689         int ret;
3690
3691         id_priv = container_of(id, struct rdma_id_private, id);
3692         if (!id_priv->cm_id.ib)
3693                 return -EINVAL;
3694
3695         if (rdma_cap_ib_cm(id->device, id->port_num)) {
3696                 if (id->qp_type == IB_QPT_UD)
3697                         ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0,
3698                                                 private_data, private_data_len);
3699                 else
3700                         ret = ib_send_cm_rej(id_priv->cm_id.ib,
3701                                              IB_CM_REJ_CONSUMER_DEFINED, NULL,
3702                                              0, private_data, private_data_len);
3703         } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
3704                 ret = iw_cm_reject(id_priv->cm_id.iw,
3705                                    private_data, private_data_len);
3706         } else
3707                 ret = -ENOSYS;
3708
3709         return ret;
3710 }
3711 EXPORT_SYMBOL(rdma_reject);
3712
3713 int rdma_disconnect(struct rdma_cm_id *id)
3714 {
3715         struct rdma_id_private *id_priv;
3716         int ret;
3717
3718         id_priv = container_of(id, struct rdma_id_private, id);
3719         if (!id_priv->cm_id.ib)
3720                 return -EINVAL;
3721
3722         if (rdma_cap_ib_cm(id->device, id->port_num)) {
3723                 ret = cma_modify_qp_err(id_priv);
3724                 if (ret)
3725                         goto out;
3726                 /* Initiate or respond to a disconnect. */
3727                 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
3728                         ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
3729         } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
3730                 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
3731         } else
3732                 ret = -EINVAL;
3733
3734 out:
3735         return ret;
3736 }
3737 EXPORT_SYMBOL(rdma_disconnect);
3738
3739 static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
3740 {
3741         struct rdma_id_private *id_priv;
3742         struct cma_multicast *mc = multicast->context;
3743         struct rdma_cm_event event;
3744         int ret = 0;
3745
3746         id_priv = mc->id_priv;
3747         mutex_lock(&id_priv->handler_mutex);
3748         if (id_priv->state != RDMA_CM_ADDR_BOUND &&
3749             id_priv->state != RDMA_CM_ADDR_RESOLVED)
3750                 goto out;
3751
3752         if (!status)
3753                 status = cma_set_qkey(id_priv, be32_to_cpu(multicast->rec.qkey));
3754         mutex_lock(&id_priv->qp_mutex);
3755         if (!status && id_priv->id.qp)
3756                 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
3757                                          be16_to_cpu(multicast->rec.mlid));
3758         mutex_unlock(&id_priv->qp_mutex);
3759
3760         memset(&event, 0, sizeof event);
3761         event.status = status;
3762         event.param.ud.private_data = mc->context;
3763         if (!status) {
3764                 struct rdma_dev_addr *dev_addr =
3765                         &id_priv->id.route.addr.dev_addr;
3766                 struct net_device *ndev =
3767                         dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if);
3768                 enum ib_gid_type gid_type =
3769                         id_priv->cma_dev->default_gid_type[id_priv->id.port_num -
3770                         rdma_start_port(id_priv->cma_dev->device)];
3771
3772                 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
3773                 ib_init_ah_from_mcmember(id_priv->id.device,
3774                                          id_priv->id.port_num, &multicast->rec,
3775                                          ndev, gid_type,
3776                                          &event.param.ud.ah_attr);
3777                 event.param.ud.qp_num = 0xFFFFFF;
3778                 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
3779                 if (ndev)
3780                         dev_put(ndev);
3781         } else
3782                 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
3783
3784         ret = id_priv->id.event_handler(&id_priv->id, &event);
3785         if (ret) {
3786                 cma_exch(id_priv, RDMA_CM_DESTROYING);
3787                 mutex_unlock(&id_priv->handler_mutex);
3788                 rdma_destroy_id(&id_priv->id);
3789                 return 0;
3790         }
3791
3792 out:
3793         mutex_unlock(&id_priv->handler_mutex);
3794         return 0;
3795 }
3796
3797 static void cma_set_mgid(struct rdma_id_private *id_priv,
3798                          struct sockaddr *addr, union ib_gid *mgid)
3799 {
3800         unsigned char mc_map[MAX_ADDR_LEN];
3801         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3802         struct sockaddr_in *sin = (struct sockaddr_in *) addr;
3803         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
3804
3805         if (cma_any_addr(addr)) {
3806                 memset(mgid, 0, sizeof *mgid);
3807         } else if ((addr->sa_family == AF_INET6) &&
3808                    ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
3809                                                                  0xFF10A01B)) {
3810                 /* IPv6 address is an SA assigned MGID. */
3811                 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3812         } else if (addr->sa_family == AF_IB) {
3813                 memcpy(mgid, &((struct sockaddr_ib *) addr)->sib_addr, sizeof *mgid);
3814         } else if (addr->sa_family == AF_INET6) {
3815                 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
3816                 if (id_priv->id.ps == RDMA_PS_UDP)
3817                         mc_map[7] = 0x01;       /* Use RDMA CM signature */
3818                 *mgid = *(union ib_gid *) (mc_map + 4);
3819         } else {
3820                 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
3821                 if (id_priv->id.ps == RDMA_PS_UDP)
3822                         mc_map[7] = 0x01;       /* Use RDMA CM signature */
3823                 *mgid = *(union ib_gid *) (mc_map + 4);
3824         }
3825 }
3826
3827 static void cma_query_sa_classport_info_cb(int status,
3828                                            struct ib_class_port_info *rec,
3829                                            void *context)
3830 {
3831         struct class_port_info_context *cb_ctx = context;
3832
3833         WARN_ON(!context);
3834
3835         if (status || !rec) {
3836                 pr_debug("RDMA CM: %s port %u failed query ClassPortInfo status: %d\n",
3837                          cb_ctx->device->name, cb_ctx->port_num, status);
3838                 goto out;
3839         }
3840
3841         memcpy(cb_ctx->class_port_info, rec, sizeof(struct ib_class_port_info));
3842
3843 out:
3844         complete(&cb_ctx->done);
3845 }
3846
3847 static int cma_query_sa_classport_info(struct ib_device *device, u8 port_num,
3848                                        struct ib_class_port_info *class_port_info)
3849 {
3850         struct class_port_info_context *cb_ctx;
3851         int ret;
3852
3853         cb_ctx = kmalloc(sizeof(*cb_ctx), GFP_KERNEL);
3854         if (!cb_ctx)
3855                 return -ENOMEM;
3856
3857         cb_ctx->device = device;
3858         cb_ctx->class_port_info = class_port_info;
3859         cb_ctx->port_num = port_num;
3860         init_completion(&cb_ctx->done);
3861
3862         ret = ib_sa_classport_info_rec_query(&sa_client, device, port_num,
3863                                              CMA_QUERY_CLASSPORT_INFO_TIMEOUT,
3864                                              GFP_KERNEL, cma_query_sa_classport_info_cb,
3865                                              cb_ctx, &cb_ctx->sa_query);
3866         if (ret < 0) {
3867                 pr_err("RDMA CM: %s port %u failed to send ClassPortInfo query, ret: %d\n",
3868                        device->name, port_num, ret);
3869                 goto out;
3870         }
3871
3872         wait_for_completion(&cb_ctx->done);
3873
3874 out:
3875         kfree(cb_ctx);
3876         return ret;
3877 }
3878
3879 static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
3880                                  struct cma_multicast *mc)
3881 {
3882         struct ib_sa_mcmember_rec rec;
3883         struct ib_class_port_info class_port_info;
3884         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3885         ib_sa_comp_mask comp_mask;
3886         int ret;
3887
3888         ib_addr_get_mgid(dev_addr, &rec.mgid);
3889         ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
3890                                      &rec.mgid, &rec);
3891         if (ret)
3892                 return ret;
3893
3894         ret = cma_set_qkey(id_priv, 0);
3895         if (ret)
3896                 return ret;
3897
3898         cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
3899         rec.qkey = cpu_to_be32(id_priv->qkey);
3900         rdma_addr_get_sgid(dev_addr, &rec.port_gid);
3901         rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
3902         rec.join_state = mc->join_state;
3903
3904         if (rec.join_state == BIT(SENDONLY_FULLMEMBER_JOIN)) {
3905                 ret = cma_query_sa_classport_info(id_priv->id.device,
3906                                                   id_priv->id.port_num,
3907                                                   &class_port_info);
3908
3909                 if (ret)
3910                         return ret;
3911
3912                 if (!(ib_get_cpi_capmask2(&class_port_info) &
3913                       IB_SA_CAP_MASK2_SENDONLY_FULL_MEM_SUPPORT)) {
3914                         pr_warn("RDMA CM: %s port %u Unable to multicast join\n"
3915                                 "RDMA CM: SM doesn't support Send Only Full Member option\n",
3916                                 id_priv->id.device->name, id_priv->id.port_num);
3917                         return -EOPNOTSUPP;
3918                 }
3919         }
3920
3921         comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
3922                     IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
3923                     IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
3924                     IB_SA_MCMEMBER_REC_FLOW_LABEL |
3925                     IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
3926
3927         if (id_priv->id.ps == RDMA_PS_IPOIB)
3928                 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
3929                              IB_SA_MCMEMBER_REC_RATE_SELECTOR |
3930                              IB_SA_MCMEMBER_REC_MTU_SELECTOR |
3931                              IB_SA_MCMEMBER_REC_MTU |
3932                              IB_SA_MCMEMBER_REC_HOP_LIMIT;
3933
3934         mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
3935                                                 id_priv->id.port_num, &rec,
3936                                                 comp_mask, GFP_KERNEL,
3937                                                 cma_ib_mc_handler, mc);
3938         return PTR_ERR_OR_ZERO(mc->multicast.ib);
3939 }
3940
3941 static void iboe_mcast_work_handler(struct work_struct *work)
3942 {
3943         struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
3944         struct cma_multicast *mc = mw->mc;
3945         struct ib_sa_multicast *m = mc->multicast.ib;
3946
3947         mc->multicast.ib->context = mc;
3948         cma_ib_mc_handler(0, m);
3949         kref_put(&mc->mcref, release_mc);
3950         kfree(mw);
3951 }
3952
3953 static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid)
3954 {
3955         struct sockaddr_in *sin = (struct sockaddr_in *)addr;
3956         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
3957
3958         if (cma_any_addr(addr)) {
3959                 memset(mgid, 0, sizeof *mgid);
3960         } else if (addr->sa_family == AF_INET6) {
3961                 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3962         } else {
3963                 mgid->raw[0] = 0xff;
3964                 mgid->raw[1] = 0x0e;
3965                 mgid->raw[2] = 0;
3966                 mgid->raw[3] = 0;
3967                 mgid->raw[4] = 0;
3968                 mgid->raw[5] = 0;
3969                 mgid->raw[6] = 0;
3970                 mgid->raw[7] = 0;
3971                 mgid->raw[8] = 0;
3972                 mgid->raw[9] = 0;
3973                 mgid->raw[10] = 0xff;
3974                 mgid->raw[11] = 0xff;
3975                 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
3976         }
3977 }
3978
3979 static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
3980                                    struct cma_multicast *mc)
3981 {
3982         struct iboe_mcast_work *work;
3983         struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3984         int err = 0;
3985         struct sockaddr *addr = (struct sockaddr *)&mc->addr;
3986         struct net_device *ndev = NULL;
3987         enum ib_gid_type gid_type;
3988         bool send_only;
3989
3990         send_only = mc->join_state == BIT(SENDONLY_FULLMEMBER_JOIN);
3991
3992         if (cma_zero_addr((struct sockaddr *)&mc->addr))
3993                 return -EINVAL;
3994
3995         work = kzalloc(sizeof *work, GFP_KERNEL);
3996         if (!work)
3997                 return -ENOMEM;
3998
3999         mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
4000         if (!mc->multicast.ib) {
4001                 err = -ENOMEM;
4002                 goto out1;
4003         }
4004
4005         cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid);
4006
4007         mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
4008         if (id_priv->id.ps == RDMA_PS_UDP)
4009                 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
4010
4011         if (dev_addr->bound_dev_if)
4012                 ndev = dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if);
4013         if (!ndev) {
4014                 err = -ENODEV;
4015                 goto out2;
4016         }
4017         mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
4018         mc->multicast.ib->rec.hop_limit = 1;
4019         mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->if_mtu);
4020
4021         gid_type = id_priv->cma_dev->default_gid_type[id_priv->id.port_num -
4022                    rdma_start_port(id_priv->cma_dev->device)];
4023         if (addr->sa_family == AF_INET) {
4024                 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) {
4025                         mc->multicast.ib->rec.hop_limit = IPV6_DEFAULT_HOPLIMIT;
4026                         if (!send_only) {
4027                                 mc->igmp_joined = true;
4028                         }
4029                 }
4030         } else {
4031                 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP)
4032                         err = -ENOTSUPP;
4033         }
4034         dev_put(ndev);
4035         if (err || !mc->multicast.ib->rec.mtu) {
4036                 if (!err)
4037                         err = -EINVAL;
4038                 goto out2;
4039         }
4040         rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
4041                     &mc->multicast.ib->rec.port_gid);
4042         work->id = id_priv;
4043         work->mc = mc;
4044         INIT_WORK(&work->work, iboe_mcast_work_handler);
4045         kref_get(&mc->mcref);
4046         queue_work(cma_wq, &work->work);
4047
4048         return 0;
4049
4050 out2:
4051         kfree(mc->multicast.ib);
4052 out1:
4053         kfree(work);
4054         return err;
4055 }
4056
4057 int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
4058                         u8 join_state, void *context)
4059 {
4060         struct rdma_id_private *id_priv;
4061         struct cma_multicast *mc;
4062         int ret;
4063
4064         id_priv = container_of(id, struct rdma_id_private, id);
4065         if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) &&
4066             !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED))
4067                 return -EINVAL;
4068
4069         mc = kmalloc(sizeof *mc, GFP_KERNEL);
4070         if (!mc)
4071                 return -ENOMEM;
4072
4073         memcpy(&mc->addr, addr, rdma_addr_size(addr));
4074         mc->context = context;
4075         mc->id_priv = id_priv;
4076         mc->igmp_joined = false;
4077         mc->join_state = join_state;
4078         spin_lock(&id_priv->lock);
4079         list_add(&mc->list, &id_priv->mc_list);
4080         spin_unlock(&id_priv->lock);
4081
4082         if (rdma_protocol_roce(id->device, id->port_num)) {
4083                 kref_init(&mc->mcref);
4084                 ret = cma_iboe_join_multicast(id_priv, mc);
4085         } else if (rdma_cap_ib_mcast(id->device, id->port_num))
4086                 ret = cma_join_ib_multicast(id_priv, mc);
4087         else
4088                 ret = -ENOSYS;
4089
4090         if (ret) {
4091                 spin_lock_irq(&id_priv->lock);
4092                 list_del(&mc->list);
4093                 spin_unlock_irq(&id_priv->lock);
4094                 kfree(mc);
4095         }
4096         return ret;
4097 }
4098 EXPORT_SYMBOL(rdma_join_multicast);
4099
4100 void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
4101 {
4102         struct rdma_id_private *id_priv;
4103         struct cma_multicast *mc;
4104
4105         id_priv = container_of(id, struct rdma_id_private, id);
4106         spin_lock_irq(&id_priv->lock);
4107         list_for_each_entry(mc, &id_priv->mc_list, list) {
4108                 if (!memcmp(&mc->addr, addr, rdma_addr_size(addr))) {
4109                         list_del(&mc->list);
4110                         spin_unlock_irq(&id_priv->lock);
4111
4112                         if (id->qp)
4113                                 ib_detach_mcast(id->qp,
4114                                                 &mc->multicast.ib->rec.mgid,
4115                                                 be16_to_cpu(mc->multicast.ib->rec.mlid));
4116
4117                         BUG_ON(id_priv->cma_dev->device != id->device);
4118
4119                         if (rdma_cap_ib_mcast(id->device, id->port_num)) {
4120                                 ib_sa_free_multicast(mc->multicast.ib);
4121                                 kfree(mc);
4122                         } else if (rdma_protocol_roce(id->device, id->port_num)) {
4123                                 if (mc->igmp_joined) {
4124                                         struct rdma_dev_addr *dev_addr =
4125                                                 &id->route.addr.dev_addr;
4126                                         struct net_device *ndev = NULL;
4127
4128                                         if (dev_addr->bound_dev_if)
4129                                                 ndev = dev_get_by_index(dev_addr->net,
4130                                                                         dev_addr->bound_dev_if);
4131                                         if (ndev) {
4132                                                 dev_put(ndev);
4133                                         }
4134                                         mc->igmp_joined = false;
4135                                 }
4136                                 kref_put(&mc->mcref, release_mc);
4137                         }
4138                         return;
4139                 }
4140         }
4141         spin_unlock_irq(&id_priv->lock);
4142 }
4143 EXPORT_SYMBOL(rdma_leave_multicast);
4144
4145 static int
4146 sysctl_cma_default_roce_mode(SYSCTL_HANDLER_ARGS)
4147 {
4148         struct cma_device *cma_dev = arg1;
4149         const int port = arg2;
4150         char buf[64];
4151         int error;
4152
4153         strlcpy(buf, ib_cache_gid_type_str(
4154             cma_get_default_gid_type(cma_dev, port)), sizeof(buf));
4155
4156         error = sysctl_handle_string(oidp, buf, sizeof(buf), req);
4157         if (error != 0 || req->newptr == NULL)
4158                 goto done;
4159
4160         error = ib_cache_gid_parse_type_str(buf);
4161         if (error < 0) {
4162                 error = EINVAL;
4163                 goto done;
4164         }
4165
4166         cma_set_default_gid_type(cma_dev, port, error);
4167         error = 0;
4168 done:
4169         return (error);
4170 }
4171
4172 static void cma_add_one(struct ib_device *device)
4173 {
4174         struct cma_device *cma_dev;
4175         struct rdma_id_private *id_priv;
4176         unsigned int i;
4177
4178         cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
4179         if (!cma_dev)
4180                 return;
4181
4182         sysctl_ctx_init(&cma_dev->sysctl_ctx);
4183
4184         cma_dev->device = device;
4185         cma_dev->default_gid_type = kcalloc(device->phys_port_cnt,
4186                                             sizeof(*cma_dev->default_gid_type),
4187                                             GFP_KERNEL);
4188         if (!cma_dev->default_gid_type) {
4189                 kfree(cma_dev);
4190                 return;
4191         }
4192         for (i = rdma_start_port(device); i <= rdma_end_port(device); i++) {
4193                 unsigned long supported_gids;
4194                 unsigned int default_gid_type;
4195
4196                 supported_gids = roce_gid_type_mask_support(device, i);
4197
4198                 if (WARN_ON(!supported_gids)) {
4199                         /* set something valid */
4200                         default_gid_type = 0;
4201                 } else if (test_bit(IB_GID_TYPE_ROCE_UDP_ENCAP, &supported_gids)) {
4202                         /* prefer RoCEv2, if supported */
4203                         default_gid_type = IB_GID_TYPE_ROCE_UDP_ENCAP;
4204                 } else {
4205                         default_gid_type = find_first_bit(&supported_gids,
4206                             BITS_PER_LONG);
4207                 }
4208                 cma_dev->default_gid_type[i - rdma_start_port(device)] =
4209                     default_gid_type;
4210         }
4211
4212         init_completion(&cma_dev->comp);
4213         atomic_set(&cma_dev->refcount, 1);
4214         INIT_LIST_HEAD(&cma_dev->id_list);
4215         ib_set_client_data(device, &cma_client, cma_dev);
4216
4217         mutex_lock(&lock);
4218         list_add_tail(&cma_dev->list, &dev_list);
4219         list_for_each_entry(id_priv, &listen_any_list, list)
4220                 cma_listen_on_dev(id_priv, cma_dev);
4221         mutex_unlock(&lock);
4222
4223         for (i = rdma_start_port(device); i <= rdma_end_port(device); i++) {
4224                 char buf[64];
4225
4226                 snprintf(buf, sizeof(buf), "default_roce_mode_port%d", i);
4227
4228                 (void) SYSCTL_ADD_PROC(&cma_dev->sysctl_ctx,
4229                     SYSCTL_CHILDREN(device->ports_parent->parent->oidp),
4230                     OID_AUTO, buf, CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE,
4231                     cma_dev, i, &sysctl_cma_default_roce_mode, "A",
4232                     "Default RoCE mode. Valid values: IB/RoCE v1 and RoCE v2");
4233         }
4234 }
4235
4236 static int cma_remove_id_dev(struct rdma_id_private *id_priv)
4237 {
4238         struct rdma_cm_event event;
4239         enum rdma_cm_state state;
4240         int ret = 0;
4241
4242         /* Record that we want to remove the device */
4243         state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL);
4244         if (state == RDMA_CM_DESTROYING)
4245                 return 0;
4246
4247         cma_cancel_operation(id_priv, state);
4248         mutex_lock(&id_priv->handler_mutex);
4249
4250         /* Check for destruction from another callback. */
4251         if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL))
4252                 goto out;
4253
4254         memset(&event, 0, sizeof event);
4255         event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
4256         ret = id_priv->id.event_handler(&id_priv->id, &event);
4257 out:
4258         mutex_unlock(&id_priv->handler_mutex);
4259         return ret;
4260 }
4261
4262 static void cma_process_remove(struct cma_device *cma_dev)
4263 {
4264         struct rdma_id_private *id_priv;
4265         int ret;
4266
4267         mutex_lock(&lock);
4268         while (!list_empty(&cma_dev->id_list)) {
4269                 id_priv = list_entry(cma_dev->id_list.next,
4270                                      struct rdma_id_private, list);
4271
4272                 list_del(&id_priv->listen_list);
4273                 list_del_init(&id_priv->list);
4274                 atomic_inc(&id_priv->refcount);
4275                 mutex_unlock(&lock);
4276
4277                 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
4278                 cma_deref_id(id_priv);
4279                 if (ret)
4280                         rdma_destroy_id(&id_priv->id);
4281
4282                 mutex_lock(&lock);
4283         }
4284         mutex_unlock(&lock);
4285
4286         cma_deref_dev(cma_dev);
4287         wait_for_completion(&cma_dev->comp);
4288 }
4289
4290 static void cma_remove_one(struct ib_device *device, void *client_data)
4291 {
4292         struct cma_device *cma_dev = client_data;
4293
4294         if (!cma_dev)
4295                 return;
4296
4297         mutex_lock(&lock);
4298         list_del(&cma_dev->list);
4299         mutex_unlock(&lock);
4300
4301         cma_process_remove(cma_dev);
4302         sysctl_ctx_free(&cma_dev->sysctl_ctx);
4303         kfree(cma_dev->default_gid_type);
4304         kfree(cma_dev);
4305 }
4306
4307 static void cma_init_vnet(void *arg)
4308 {
4309         struct cma_pernet *pernet = &VNET(cma_pernet);
4310
4311         idr_init(&pernet->tcp_ps);
4312         idr_init(&pernet->udp_ps);
4313         idr_init(&pernet->ipoib_ps);
4314         idr_init(&pernet->ib_ps);
4315 }
4316 VNET_SYSINIT(cma_init_vnet, SI_SUB_OFED_MODINIT - 1, SI_ORDER_FIRST, cma_init_vnet, NULL);
4317
4318 static void cma_destroy_vnet(void *arg)
4319 {
4320         struct cma_pernet *pernet = &VNET(cma_pernet);
4321
4322         idr_destroy(&pernet->tcp_ps);
4323         idr_destroy(&pernet->udp_ps);
4324         idr_destroy(&pernet->ipoib_ps);
4325         idr_destroy(&pernet->ib_ps);
4326 }
4327 VNET_SYSUNINIT(cma_destroy_vnet, SI_SUB_OFED_MODINIT - 1, SI_ORDER_SECOND, cma_destroy_vnet, NULL);
4328
4329 static int __init cma_init(void)
4330 {
4331         int ret;
4332
4333         cma_wq = alloc_ordered_workqueue("rdma_cm", WQ_MEM_RECLAIM);
4334         if (!cma_wq)
4335                 return -ENOMEM;
4336
4337         ib_sa_register_client(&sa_client);
4338         rdma_addr_register_client(&addr_client);
4339
4340         ret = ib_register_client(&cma_client);
4341         if (ret)
4342                 goto err;
4343
4344         cma_configfs_init();
4345
4346         return 0;
4347
4348 err:
4349         rdma_addr_unregister_client(&addr_client);
4350         ib_sa_unregister_client(&sa_client);
4351         destroy_workqueue(cma_wq);
4352         return ret;
4353 }
4354
4355 static void __exit cma_cleanup(void)
4356 {
4357         cma_configfs_exit();
4358         ib_unregister_client(&cma_client);
4359         rdma_addr_unregister_client(&addr_client);
4360         ib_sa_unregister_client(&sa_client);
4361         destroy_workqueue(cma_wq);
4362 }
4363
4364 module_init(cma_init);
4365 module_exit(cma_cleanup);