drivers/infiniband/core/sa_query.c

   1 /*
   2  * Copyright (c) 2004 Topspin Communications.  All rights reserved.
   3  * Copyright (c) 2005 Voltaire, Inc.  All rights reserved.
   4  * Copyright (c) 2006 Intel Corporation.  All rights reserved.
   5  *
   6  * This software is available to you under a choice of one of two
   7  * licenses.  You may choose to be licensed under the terms of the GNU
   8  * General Public License (GPL) Version 2, available from the file
   9  * COPYING in the main directory of this source tree, or the
  10  * OpenIB.org BSD license below:
  11  *
  12  *     Redistribution and use in source and binary forms, with or
  13  *     without modification, are permitted provided that the following
  14  *     conditions are met:
  15  *
  16  *      - Redistributions of source code must retain the above
  17  *        copyright notice, this list of conditions and the following
  18  *        disclaimer.
  19  *
  20  *      - Redistributions in binary form must reproduce the above
  21  *        copyright notice, this list of conditions and the following
  22  *        disclaimer in the documentation and/or other materials
  23  *        provided with the distribution.
  24  *
  25  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  26  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  27  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  28  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  29  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  30  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  31  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  32  * SOFTWARE.
  33  */
  34
  35 #include <linux/module.h>
  36 #include <linux/init.h>
  37 #include <linux/err.h>
  38 #include <linux/random.h>
  39 #include <linux/spinlock.h>
  40 #include <linux/slab.h>
  41 #include <linux/dma-mapping.h>
  42 #include <linux/kref.h>
  43 #include <linux/idr.h>
  44 #include <linux/workqueue.h>
  45 #include <uapi/linux/if_ether.h>
  46 #include <rdma/ib_pack.h>
  47 #include <rdma/ib_cache.h>
  48 #include <rdma/rdma_netlink.h>
  49 #include <net/netlink.h>
  50 #include <uapi/rdma/ib_user_sa.h>
  51 #include <rdma/ib_marshall.h>
  52 #include <rdma/ib_addr.h>
  53 #include "sa.h"
  54 #include "core_priv.h"
  55
  56 MODULE_AUTHOR("Roland Dreier");
  57 MODULE_DESCRIPTION("InfiniBand subnet administration query support");
  58 MODULE_LICENSE("Dual BSD/GPL");
  59
  60 #define IB_SA_LOCAL_SVC_TIMEOUT_MIN             100
  61 #define IB_SA_LOCAL_SVC_TIMEOUT_DEFAULT         2000
  62 #define IB_SA_LOCAL_SVC_TIMEOUT_MAX             200000
  63 static int sa_local_svc_timeout_ms = IB_SA_LOCAL_SVC_TIMEOUT_DEFAULT;
  64
  65 struct ib_sa_sm_ah {
  66         struct ib_ah        *ah;
  67         struct kref          ref;
  68         u16                  pkey_index;
  69         u8                   src_path_mask;
  70 };
  71
  72 struct ib_sa_port {
  73         struct ib_mad_agent *agent;
  74         struct ib_sa_sm_ah  *sm_ah;
  75         struct work_struct   update_task;
  76         spinlock_t           ah_lock;
  77         u8                   port_num;
  78 };
  79
  80 struct ib_sa_device {
  81         int                     start_port, end_port;
  82         struct ib_event_handler event_handler;
  83         struct ib_sa_port port[0];
  84 };
  85
  86 struct ib_sa_query {
  87         void (*callback)(struct ib_sa_query *, int, struct ib_sa_mad *);
  88         void (*release)(struct ib_sa_query *);
  89         struct ib_sa_client    *client;
  90         struct ib_sa_port      *port;
  91         struct ib_mad_send_buf *mad_buf;
  92         struct ib_sa_sm_ah     *sm_ah;
  93         int                     id;
  94         u32                     flags;
  95         struct list_head        list; /* Local svc request list */
  96         u32                     seq; /* Local svc request sequence number */
  97         unsigned long           timeout; /* Local svc timeout */
  98         u8                      path_use; /* How will the pathrecord be used */
  99 };
 100
 101 #define IB_SA_ENABLE_LOCAL_SERVICE      0x00000001
 102 #define IB_SA_CANCEL                    0x00000002
 103
 104 struct ib_sa_service_query {
 105         void (*callback)(int, struct ib_sa_service_rec *, void *);
 106         void *context;
 107         struct ib_sa_query sa_query;
 108 };
 109
 110 struct ib_sa_path_query {
 111         void (*callback)(int, struct ib_sa_path_rec *, void *);
 112         void *context;
 113         struct ib_sa_query sa_query;
 114 };
 115
 116 struct ib_sa_guidinfo_query {
 117         void (*callback)(int, struct ib_sa_guidinfo_rec *, void *);
 118         void *context;
 119         struct ib_sa_query sa_query;
 120 };
 121
 122 struct ib_sa_mcmember_query {
 123         void (*callback)(int, struct ib_sa_mcmember_rec *, void *);
 124         void *context;
 125         struct ib_sa_query sa_query;
 126 };
 127
 128 static LIST_HEAD(ib_nl_request_list);
 129 static DEFINE_SPINLOCK(ib_nl_request_lock);
 130 static atomic_t ib_nl_sa_request_seq;
 131 static struct workqueue_struct *ib_nl_wq;
 132 static struct delayed_work ib_nl_timed_work;
 133 static const struct nla_policy ib_nl_policy[LS_NLA_TYPE_MAX] = {
 134         [LS_NLA_TYPE_PATH_RECORD]       = {.type = NLA_BINARY,
 135                 .len = sizeof(struct ib_path_rec_data)},
 136         [LS_NLA_TYPE_TIMEOUT]           = {.type = NLA_U32},
 137         [LS_NLA_TYPE_SERVICE_ID]        = {.type = NLA_U64},
 138         [LS_NLA_TYPE_DGID]              = {.type = NLA_BINARY,
 139                 .len = sizeof(struct rdma_nla_ls_gid)},
 140         [LS_NLA_TYPE_SGID]              = {.type = NLA_BINARY,
 141                 .len = sizeof(struct rdma_nla_ls_gid)},
 142         [LS_NLA_TYPE_TCLASS]            = {.type = NLA_U8},
 143         [LS_NLA_TYPE_PKEY]              = {.type = NLA_U16},
 144         [LS_NLA_TYPE_QOS_CLASS]         = {.type = NLA_U16},
 145 };
 146
 147
 148 static void ib_sa_add_one(struct ib_device *device);
 149 static void ib_sa_remove_one(struct ib_device *device, void *client_data);
 150
 151 static struct ib_client sa_client = {
 152         .name   = "sa",
 153         .add    = ib_sa_add_one,
 154         .remove = ib_sa_remove_one
 155 };
 156
 157 static DEFINE_SPINLOCK(idr_lock);
 158 static DEFINE_IDR(query_idr);
 159
 160 static DEFINE_SPINLOCK(tid_lock);
 161 static u32 tid;
 162
 163 #define PATH_REC_FIELD(field) \
 164         .struct_offset_bytes = offsetof(struct ib_sa_path_rec, field),          \
 165         .struct_size_bytes   = sizeof ((struct ib_sa_path_rec *) 0)->field,     \
 166         .field_name          = "sa_path_rec:" #field
 167
 168 static const struct ib_field path_rec_table[] = {
 169         { PATH_REC_FIELD(service_id),
 170           .offset_words = 0,
 171           .offset_bits  = 0,
 172           .size_bits    = 64 },
 173         { PATH_REC_FIELD(dgid),
 174           .offset_words = 2,
 175           .offset_bits  = 0,
 176           .size_bits    = 128 },
 177         { PATH_REC_FIELD(sgid),
 178           .offset_words = 6,
 179           .offset_bits  = 0,
 180           .size_bits    = 128 },
 181         { PATH_REC_FIELD(dlid),
 182           .offset_words = 10,
 183           .offset_bits  = 0,
 184           .size_bits    = 16 },
 185         { PATH_REC_FIELD(slid),
 186           .offset_words = 10,
 187           .offset_bits  = 16,
 188           .size_bits    = 16 },
 189         { PATH_REC_FIELD(raw_traffic),
 190           .offset_words = 11,
 191           .offset_bits  = 0,
 192           .size_bits    = 1 },
 193         { RESERVED,
 194           .offset_words = 11,
 195           .offset_bits  = 1,
 196           .size_bits    = 3 },
 197         { PATH_REC_FIELD(flow_label),
 198           .offset_words = 11,
 199           .offset_bits  = 4,
 200           .size_bits    = 20 },
 201         { PATH_REC_FIELD(hop_limit),
 202           .offset_words = 11,
 203           .offset_bits  = 24,
 204           .size_bits    = 8 },
 205         { PATH_REC_FIELD(traffic_class),
 206           .offset_words = 12,
 207           .offset_bits  = 0,
 208           .size_bits    = 8 },
 209         { PATH_REC_FIELD(reversible),
 210           .offset_words = 12,
 211           .offset_bits  = 8,
 212           .size_bits    = 1 },
 213         { PATH_REC_FIELD(numb_path),
 214           .offset_words = 12,
 215           .offset_bits  = 9,
 216           .size_bits    = 7 },
 217         { PATH_REC_FIELD(pkey),
 218           .offset_words = 12,
 219           .offset_bits  = 16,
 220           .size_bits    = 16 },
 221         { PATH_REC_FIELD(qos_class),
 222           .offset_words = 13,
 223           .offset_bits  = 0,
 224           .size_bits    = 12 },
 225         { PATH_REC_FIELD(sl),
 226           .offset_words = 13,
 227           .offset_bits  = 12,
 228           .size_bits    = 4 },
 229         { PATH_REC_FIELD(mtu_selector),
 230           .offset_words = 13,
 231           .offset_bits  = 16,
 232           .size_bits    = 2 },
 233         { PATH_REC_FIELD(mtu),
 234           .offset_words = 13,
 235           .offset_bits  = 18,
 236           .size_bits    = 6 },
 237         { PATH_REC_FIELD(rate_selector),
 238           .offset_words = 13,
 239           .offset_bits  = 24,
 240           .size_bits    = 2 },
 241         { PATH_REC_FIELD(rate),
 242           .offset_words = 13,
 243           .offset_bits  = 26,
 244           .size_bits    = 6 },
 245         { PATH_REC_FIELD(packet_life_time_selector),
 246           .offset_words = 14,
 247           .offset_bits  = 0,
 248           .size_bits    = 2 },
 249         { PATH_REC_FIELD(packet_life_time),
 250           .offset_words = 14,
 251           .offset_bits  = 2,
 252           .size_bits    = 6 },
 253         { PATH_REC_FIELD(preference),
 254           .offset_words = 14,
 255           .offset_bits  = 8,
 256           .size_bits    = 8 },
 257         { RESERVED,
 258           .offset_words = 14,
 259           .offset_bits  = 16,
 260           .size_bits    = 48 },
 261 };
 262
 263 #define MCMEMBER_REC_FIELD(field) \
 264         .struct_offset_bytes = offsetof(struct ib_sa_mcmember_rec, field),      \
 265         .struct_size_bytes   = sizeof ((struct ib_sa_mcmember_rec *) 0)->field, \
 266         .field_name          = "sa_mcmember_rec:" #field
 267
 268 static const struct ib_field mcmember_rec_table[] = {
 269         { MCMEMBER_REC_FIELD(mgid),
 270           .offset_words = 0,
 271           .offset_bits  = 0,
 272           .size_bits    = 128 },
 273         { MCMEMBER_REC_FIELD(port_gid),
 274           .offset_words = 4,
 275           .offset_bits  = 0,
 276           .size_bits    = 128 },
 277         { MCMEMBER_REC_FIELD(qkey),
 278           .offset_words = 8,
 279           .offset_bits  = 0,
 280           .size_bits    = 32 },
 281         { MCMEMBER_REC_FIELD(mlid),
 282           .offset_words = 9,
 283           .offset_bits  = 0,
 284           .size_bits    = 16 },
 285         { MCMEMBER_REC_FIELD(mtu_selector),
 286           .offset_words = 9,
 287           .offset_bits  = 16,
 288           .size_bits    = 2 },
 289         { MCMEMBER_REC_FIELD(mtu),
 290           .offset_words = 9,
 291           .offset_bits  = 18,
 292           .size_bits    = 6 },
 293         { MCMEMBER_REC_FIELD(traffic_class),
 294           .offset_words = 9,
 295           .offset_bits  = 24,
 296           .size_bits    = 8 },
 297         { MCMEMBER_REC_FIELD(pkey),
 298           .offset_words = 10,
 299           .offset_bits  = 0,
 300           .size_bits    = 16 },
 301         { MCMEMBER_REC_FIELD(rate_selector),
 302           .offset_words = 10,
 303           .offset_bits  = 16,
 304           .size_bits    = 2 },
 305         { MCMEMBER_REC_FIELD(rate),
 306           .offset_words = 10,
 307           .offset_bits  = 18,
 308           .size_bits    = 6 },
 309         { MCMEMBER_REC_FIELD(packet_life_time_selector),
 310           .offset_words = 10,
 311           .offset_bits  = 24,
 312           .size_bits    = 2 },
 313         { MCMEMBER_REC_FIELD(packet_life_time),
 314           .offset_words = 10,
 315           .offset_bits  = 26,
 316           .size_bits    = 6 },
 317         { MCMEMBER_REC_FIELD(sl),
 318           .offset_words = 11,
 319           .offset_bits  = 0,
 320           .size_bits    = 4 },
 321         { MCMEMBER_REC_FIELD(flow_label),
 322           .offset_words = 11,
 323           .offset_bits  = 4,
 324           .size_bits    = 20 },
 325         { MCMEMBER_REC_FIELD(hop_limit),
 326           .offset_words = 11,
 327           .offset_bits  = 24,
 328           .size_bits    = 8 },
 329         { MCMEMBER_REC_FIELD(scope),
 330           .offset_words = 12,
 331           .offset_bits  = 0,
 332           .size_bits    = 4 },
 333         { MCMEMBER_REC_FIELD(join_state),
 334           .offset_words = 12,
 335           .offset_bits  = 4,
 336           .size_bits    = 4 },
 337         { MCMEMBER_REC_FIELD(proxy_join),
 338           .offset_words = 12,
 339           .offset_bits  = 8,
 340           .size_bits    = 1 },
 341         { RESERVED,
 342           .offset_words = 12,
 343           .offset_bits  = 9,
 344           .size_bits    = 23 },
 345 };
 346
 347 #define SERVICE_REC_FIELD(field) \
 348         .struct_offset_bytes = offsetof(struct ib_sa_service_rec, field),       \
 349         .struct_size_bytes   = sizeof ((struct ib_sa_service_rec *) 0)->field,  \
 350         .field_name          = "sa_service_rec:" #field
 351
 352 static const struct ib_field service_rec_table[] = {
 353         { SERVICE_REC_FIELD(id),
 354           .offset_words = 0,
 355           .offset_bits  = 0,
 356           .size_bits    = 64 },
 357         { SERVICE_REC_FIELD(gid),
 358           .offset_words = 2,
 359           .offset_bits  = 0,
 360           .size_bits    = 128 },
 361         { SERVICE_REC_FIELD(pkey),
 362           .offset_words = 6,
 363           .offset_bits  = 0,
 364           .size_bits    = 16 },
 365         { SERVICE_REC_FIELD(lease),
 366           .offset_words = 7,
 367           .offset_bits  = 0,
 368           .size_bits    = 32 },
 369         { SERVICE_REC_FIELD(key),
 370           .offset_words = 8,
 371           .offset_bits  = 0,
 372           .size_bits    = 128 },
 373         { SERVICE_REC_FIELD(name),
 374           .offset_words = 12,
 375           .offset_bits  = 0,
 376           .size_bits    = 64*8 },
 377         { SERVICE_REC_FIELD(data8),
 378           .offset_words = 28,
 379           .offset_bits  = 0,
 380           .size_bits    = 16*8 },
 381         { SERVICE_REC_FIELD(data16),
 382           .offset_words = 32,
 383           .offset_bits  = 0,
 384           .size_bits    = 8*16 },
 385         { SERVICE_REC_FIELD(data32),
 386           .offset_words = 36,
 387           .offset_bits  = 0,
 388           .size_bits    = 4*32 },
 389         { SERVICE_REC_FIELD(data64),
 390           .offset_words = 40,
 391           .offset_bits  = 0,
 392           .size_bits    = 2*64 },
 393 };
 394
 395 #define GUIDINFO_REC_FIELD(field) \
 396         .struct_offset_bytes = offsetof(struct ib_sa_guidinfo_rec, field),      \
 397         .struct_size_bytes   = sizeof((struct ib_sa_guidinfo_rec *) 0)->field,  \
 398         .field_name          = "sa_guidinfo_rec:" #field
 399
 400 static const struct ib_field guidinfo_rec_table[] = {
 401         { GUIDINFO_REC_FIELD(lid),
 402           .offset_words = 0,
 403           .offset_bits  = 0,
 404           .size_bits    = 16 },
 405         { GUIDINFO_REC_FIELD(block_num),
 406           .offset_words = 0,
 407           .offset_bits  = 16,
 408           .size_bits    = 8 },
 409         { GUIDINFO_REC_FIELD(res1),
 410           .offset_words = 0,
 411           .offset_bits  = 24,
 412           .size_bits    = 8 },
 413         { GUIDINFO_REC_FIELD(res2),
 414           .offset_words = 1,
 415           .offset_bits  = 0,
 416           .size_bits    = 32 },
 417         { GUIDINFO_REC_FIELD(guid_info_list),
 418           .offset_words = 2,
 419           .offset_bits  = 0,
 420           .size_bits    = 512 },
 421 };
 422
 423 static inline void ib_sa_disable_local_svc(struct ib_sa_query *query)
 424 {
 425         query->flags &= ~IB_SA_ENABLE_LOCAL_SERVICE;
 426 }
 427
 428 static inline int ib_sa_query_cancelled(struct ib_sa_query *query)
 429 {
 430         return (query->flags & IB_SA_CANCEL);
 431 }
 432
 433 static void ib_nl_set_path_rec_attrs(struct sk_buff *skb,
 434                                      struct ib_sa_query *query)
 435 {
 436         struct ib_sa_path_rec *sa_rec = query->mad_buf->context[1];
 437         struct ib_sa_mad *mad = query->mad_buf->mad;
 438         ib_sa_comp_mask comp_mask = mad->sa_hdr.comp_mask;
 439         u16 val16;
 440         u64 val64;
 441         struct rdma_ls_resolve_header *header;
 442
 443         query->mad_buf->context[1] = NULL;
 444
 445         /* Construct the family header first */
 446         header = (struct rdma_ls_resolve_header *)
 447                 skb_put(skb, NLMSG_ALIGN(sizeof(*header)));
 448         memcpy(header->device_name, query->port->agent->device->name,
 449                LS_DEVICE_NAME_MAX);
 450         header->port_num = query->port->port_num;
 451
 452         if ((comp_mask & IB_SA_PATH_REC_REVERSIBLE) &&
 453             sa_rec->reversible != 0)
 454                 query->path_use = LS_RESOLVE_PATH_USE_GMP;
 455         else
 456                 query->path_use = LS_RESOLVE_PATH_USE_UNIDIRECTIONAL;
 457         header->path_use = query->path_use;
 458
 459         /* Now build the attributes */
 460         if (comp_mask & IB_SA_PATH_REC_SERVICE_ID) {
 461                 val64 = be64_to_cpu(sa_rec->service_id);
 462                 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_SERVICE_ID,
 463                         sizeof(val64), &val64);
 464         }
 465         if (comp_mask & IB_SA_PATH_REC_DGID)
 466                 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_DGID,
 467                         sizeof(sa_rec->dgid), &sa_rec->dgid);
 468         if (comp_mask & IB_SA_PATH_REC_SGID)
 469                 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_SGID,
 470                         sizeof(sa_rec->sgid), &sa_rec->sgid);
 471         if (comp_mask & IB_SA_PATH_REC_TRAFFIC_CLASS)
 472                 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_TCLASS,
 473                         sizeof(sa_rec->traffic_class), &sa_rec->traffic_class);
 474
 475         if (comp_mask & IB_SA_PATH_REC_PKEY) {
 476                 val16 = be16_to_cpu(sa_rec->pkey);
 477                 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_PKEY,
 478                         sizeof(val16), &val16);
 479         }
 480         if (comp_mask & IB_SA_PATH_REC_QOS_CLASS) {
 481                 val16 = be16_to_cpu(sa_rec->qos_class);
 482                 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_QOS_CLASS,
 483                         sizeof(val16), &val16);
 484         }
 485 }
 486
 487 static int ib_nl_get_path_rec_attrs_len(ib_sa_comp_mask comp_mask)
 488 {
 489         int len = 0;
 490
 491         if (comp_mask & IB_SA_PATH_REC_SERVICE_ID)
 492                 len += nla_total_size(sizeof(u64));
 493         if (comp_mask & IB_SA_PATH_REC_DGID)
 494                 len += nla_total_size(sizeof(struct rdma_nla_ls_gid));
 495         if (comp_mask & IB_SA_PATH_REC_SGID)
 496                 len += nla_total_size(sizeof(struct rdma_nla_ls_gid));
 497         if (comp_mask & IB_SA_PATH_REC_TRAFFIC_CLASS)
 498                 len += nla_total_size(sizeof(u8));
 499         if (comp_mask & IB_SA_PATH_REC_PKEY)
 500                 len += nla_total_size(sizeof(u16));
 501         if (comp_mask & IB_SA_PATH_REC_QOS_CLASS)
 502                 len += nla_total_size(sizeof(u16));
 503
 504         /*
 505          * Make sure that at least some of the required comp_mask bits are
 506          * set.
 507          */
 508         if (WARN_ON(len == 0))
 509                 return len;
 510
 511         /* Add the family header */
 512         len += NLMSG_ALIGN(sizeof(struct rdma_ls_resolve_header));
 513
 514         return len;
 515 }
 516
 517 static int ib_nl_send_msg(struct ib_sa_query *query, gfp_t gfp_mask)
 518 {
 519         struct sk_buff *skb = NULL;
 520         struct nlmsghdr *nlh;
 521         void *data;
 522         int ret = 0;
 523         struct ib_sa_mad *mad;
 524         int len;
 525
 526         mad = query->mad_buf->mad;
 527         len = ib_nl_get_path_rec_attrs_len(mad->sa_hdr.comp_mask);
 528         if (len <= 0)
 529                 return -EMSGSIZE;
 530
 531         skb = nlmsg_new(len, gfp_mask);
 532         if (!skb)
 533                 return -ENOMEM;
 534
 535         /* Put nlmsg header only for now */
 536         data = ibnl_put_msg(skb, &nlh, query->seq, 0, RDMA_NL_LS,
 537                             RDMA_NL_LS_OP_RESOLVE, NLM_F_REQUEST);
 538         if (!data) {
 539                 kfree_skb(skb);
 540                 return -EMSGSIZE;
 541         }
 542
 543         /* Add attributes */
 544         ib_nl_set_path_rec_attrs(skb, query);
 545
 546         /* Repair the nlmsg header length */
 547         nlmsg_end(skb, nlh);
 548
 549         ret = ibnl_multicast(skb, nlh, RDMA_NL_GROUP_LS, gfp_mask);
 550         if (!ret)
 551                 ret = len;
 552         else
 553                 ret = 0;
 554
 555         return ret;
 556 }
 557
 558 static int ib_nl_make_request(struct ib_sa_query *query, gfp_t gfp_mask)
 559 {
 560         unsigned long flags;
 561         unsigned long delay;
 562         int ret;
 563
 564         INIT_LIST_HEAD(&query->list);
 565         query->seq = (u32)atomic_inc_return(&ib_nl_sa_request_seq);
 566
 567         /* Put the request on the list first.*/
 568         spin_lock_irqsave(&ib_nl_request_lock, flags);
 569         delay = msecs_to_jiffies(sa_local_svc_timeout_ms);
 570         query->timeout = delay + jiffies;
 571         list_add_tail(&query->list, &ib_nl_request_list);
 572         /* Start the timeout if this is the only request */
 573         if (ib_nl_request_list.next == &query->list)
 574                 queue_delayed_work(ib_nl_wq, &ib_nl_timed_work, delay);
 575         spin_unlock_irqrestore(&ib_nl_request_lock, flags);
 576
 577         ret = ib_nl_send_msg(query, gfp_mask);
 578         if (ret <= 0) {
 579                 ret = -EIO;
 580                 /* Remove the request */
 581                 spin_lock_irqsave(&ib_nl_request_lock, flags);
 582                 list_del(&query->list);
 583                 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
 584         } else {
 585                 ret = 0;
 586         }
 587
 588         return ret;
 589 }
 590
 591 static int ib_nl_cancel_request(struct ib_sa_query *query)
 592 {
 593         unsigned long flags;
 594         struct ib_sa_query *wait_query;
 595         int found = 0;
 596
 597         spin_lock_irqsave(&ib_nl_request_lock, flags);
 598         list_for_each_entry(wait_query, &ib_nl_request_list, list) {
 599                 /* Let the timeout to take care of the callback */
 600                 if (query == wait_query) {
 601                         query->flags |= IB_SA_CANCEL;
 602                         query->timeout = jiffies;
 603                         list_move(&query->list, &ib_nl_request_list);
 604                         found = 1;
 605                         mod_delayed_work(ib_nl_wq, &ib_nl_timed_work, 1);
 606                         break;
 607                 }
 608         }
 609         spin_unlock_irqrestore(&ib_nl_request_lock, flags);
 610
 611         return found;
 612 }
 613
 614 static void send_handler(struct ib_mad_agent *agent,
 615                          struct ib_mad_send_wc *mad_send_wc);
 616
 617 static void ib_nl_process_good_resolve_rsp(struct ib_sa_query *query,
 618                                            const struct nlmsghdr *nlh)
 619 {
 620         struct ib_mad_send_wc mad_send_wc;
 621         struct ib_sa_mad *mad = NULL;
 622         const struct nlattr *head, *curr;
 623         struct ib_path_rec_data  *rec;
 624         int len, rem;
 625         u32 mask = 0;
 626         int status = -EIO;
 627
 628         if (query->callback) {
 629                 head = (const struct nlattr *) nlmsg_data(nlh);
 630                 len = nlmsg_len(nlh);
 631                 switch (query->path_use) {
 632                 case LS_RESOLVE_PATH_USE_UNIDIRECTIONAL:
 633                         mask = IB_PATH_PRIMARY | IB_PATH_OUTBOUND;
 634                         break;
 635
 636                 case LS_RESOLVE_PATH_USE_ALL:
 637                 case LS_RESOLVE_PATH_USE_GMP:
 638                 default:
 639                         mask = IB_PATH_PRIMARY | IB_PATH_GMP |
 640                                 IB_PATH_BIDIRECTIONAL;
 641                         break;
 642                 }
 643                 nla_for_each_attr(curr, head, len, rem) {
 644                         if (curr->nla_type == LS_NLA_TYPE_PATH_RECORD) {
 645                                 rec = nla_data(curr);
 646                                 /*
 647                                  * Get the first one. In the future, we may
 648                                  * need to get up to 6 pathrecords.
 649                                  */
 650                                 if ((rec->flags & mask) == mask) {
 651                                         mad = query->mad_buf->mad;
 652                                         mad->mad_hdr.method |=
 653                                                 IB_MGMT_METHOD_RESP;
 654                                         memcpy(mad->data, rec->path_rec,
 655                                                sizeof(rec->path_rec));
 656                                         status = 0;
 657                                         break;
 658                                 }
 659                         }
 660                 }
 661                 query->callback(query, status, mad);
 662         }
 663
 664         mad_send_wc.send_buf = query->mad_buf;
 665         mad_send_wc.status = IB_WC_SUCCESS;
 666         send_handler(query->mad_buf->mad_agent, &mad_send_wc);
 667 }
 668
 669 static void ib_nl_request_timeout(struct work_struct *work)
 670 {
 671         unsigned long flags;
 672         struct ib_sa_query *query;
 673         unsigned long delay;
 674         struct ib_mad_send_wc mad_send_wc;
 675         int ret;
 676
 677         spin_lock_irqsave(&ib_nl_request_lock, flags);
 678         while (!list_empty(&ib_nl_request_list)) {
 679                 query = list_entry(ib_nl_request_list.next,
 680                                    struct ib_sa_query, list);
 681
 682                 if (time_after(query->timeout, jiffies)) {
 683                         delay = query->timeout - jiffies;
 684                         if ((long)delay <= 0)
 685                                 delay = 1;
 686                         queue_delayed_work(ib_nl_wq, &ib_nl_timed_work, delay);
 687                         break;
 688                 }
 689
 690                 list_del(&query->list);
 691                 ib_sa_disable_local_svc(query);
 692                 /* Hold the lock to protect against query cancellation */
 693                 if (ib_sa_query_cancelled(query))
 694                         ret = -1;
 695                 else
 696                         ret = ib_post_send_mad(query->mad_buf, NULL);
 697                 if (ret) {
 698                         mad_send_wc.send_buf = query->mad_buf;
 699                         mad_send_wc.status = IB_WC_WR_FLUSH_ERR;
 700                         spin_unlock_irqrestore(&ib_nl_request_lock, flags);
 701                         send_handler(query->port->agent, &mad_send_wc);
 702                         spin_lock_irqsave(&ib_nl_request_lock, flags);
 703                 }
 704         }
 705         spin_unlock_irqrestore(&ib_nl_request_lock, flags);
 706 }
 707
 708 static int ib_nl_handle_set_timeout(struct sk_buff *skb,
 709                                     struct netlink_callback *cb)
 710 {
 711         const struct nlmsghdr *nlh = (struct nlmsghdr *)cb->nlh;
 712         int timeout, delta, abs_delta;
 713         const struct nlattr *attr;
 714         unsigned long flags;
 715         struct ib_sa_query *query;
 716         long delay = 0;
 717         struct nlattr *tb[LS_NLA_TYPE_MAX];
 718         int ret;
 719
 720         if (!(nlh->nlmsg_flags & NLM_F_REQUEST) ||
 721             !(NETLINK_CB(skb).sk) ||
 722             !netlink_capable(skb, CAP_NET_ADMIN))
 723                 return -EPERM;
 724
 725         ret = nla_parse(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh),
 726                         nlmsg_len(nlh), ib_nl_policy);
 727         attr = (const struct nlattr *)tb[LS_NLA_TYPE_TIMEOUT];
 728         if (ret || !attr)
 729                 goto settimeout_out;
 730
 731         timeout = *(int *) nla_data(attr);
 732         if (timeout < IB_SA_LOCAL_SVC_TIMEOUT_MIN)
 733                 timeout = IB_SA_LOCAL_SVC_TIMEOUT_MIN;
 734         if (timeout > IB_SA_LOCAL_SVC_TIMEOUT_MAX)
 735                 timeout = IB_SA_LOCAL_SVC_TIMEOUT_MAX;
 736
 737         delta = timeout - sa_local_svc_timeout_ms;
 738         if (delta < 0)
 739                 abs_delta = -delta;
 740         else
 741                 abs_delta = delta;
 742
 743         if (delta != 0) {
 744                 spin_lock_irqsave(&ib_nl_request_lock, flags);
 745                 sa_local_svc_timeout_ms = timeout;
 746                 list_for_each_entry(query, &ib_nl_request_list, list) {
 747                         if (delta < 0 && abs_delta > query->timeout)
 748                                 query->timeout = 0;
 749                         else
 750                                 query->timeout += delta;
 751
 752                         /* Get the new delay from the first entry */
 753                         if (!delay) {
 754                                 delay = query->timeout - jiffies;
 755                                 if (delay <= 0)
 756                                         delay = 1;
 757                         }
 758                 }
 759                 if (delay)
 760                         mod_delayed_work(ib_nl_wq, &ib_nl_timed_work,
 761                                          (unsigned long)delay);
 762                 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
 763         }
 764
 765 settimeout_out:
 766         return skb->len;
 767 }
 768
 769 static inline int ib_nl_is_good_resolve_resp(const struct nlmsghdr *nlh)
 770 {
 771         struct nlattr *tb[LS_NLA_TYPE_MAX];
 772         int ret;
 773
 774         if (nlh->nlmsg_flags & RDMA_NL_LS_F_ERR)
 775                 return 0;
 776
 777         ret = nla_parse(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh),
 778                         nlmsg_len(nlh), ib_nl_policy);
 779         if (ret)
 780                 return 0;
 781
 782         return 1;
 783 }
 784
 785 static int ib_nl_handle_resolve_resp(struct sk_buff *skb,
 786                                      struct netlink_callback *cb)
 787 {
 788         const struct nlmsghdr *nlh = (struct nlmsghdr *)cb->nlh;
 789         unsigned long flags;
 790         struct ib_sa_query *query;
 791         struct ib_mad_send_buf *send_buf;
 792         struct ib_mad_send_wc mad_send_wc;
 793         int found = 0;
 794         int ret;
 795
 796         if ((nlh->nlmsg_flags & NLM_F_REQUEST) ||
 797             !(NETLINK_CB(skb).sk) ||
 798             !netlink_capable(skb, CAP_NET_ADMIN))
 799                 return -EPERM;
 800
 801         spin_lock_irqsave(&ib_nl_request_lock, flags);
 802         list_for_each_entry(query, &ib_nl_request_list, list) {
 803                 /*
 804                  * If the query is cancelled, let the timeout routine
 805                  * take care of it.
 806                  */
 807                 if (nlh->nlmsg_seq == query->seq) {
 808                         found = !ib_sa_query_cancelled(query);
 809                         if (found)
 810                                 list_del(&query->list);
 811                         break;
 812                 }
 813         }
 814
 815         if (!found) {
 816                 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
 817                 goto resp_out;
 818         }
 819
 820         send_buf = query->mad_buf;
 821
 822         if (!ib_nl_is_good_resolve_resp(nlh)) {
 823                 /* if the result is a failure, send out the packet via IB */
 824                 ib_sa_disable_local_svc(query);
 825                 ret = ib_post_send_mad(query->mad_buf, NULL);
 826                 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
 827                 if (ret) {
 828                         mad_send_wc.send_buf = send_buf;
 829                         mad_send_wc.status = IB_WC_GENERAL_ERR;
 830                         send_handler(query->port->agent, &mad_send_wc);
 831                 }
 832         } else {
 833                 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
 834                 ib_nl_process_good_resolve_rsp(query, nlh);
 835         }
 836
 837 resp_out:
 838         return skb->len;
 839 }
 840
 841 static struct ibnl_client_cbs ib_sa_cb_table[] = {
 842         [RDMA_NL_LS_OP_RESOLVE] = {
 843                 .dump = ib_nl_handle_resolve_resp,
 844                 .module = THIS_MODULE },
 845         [RDMA_NL_LS_OP_SET_TIMEOUT] = {
 846                 .dump = ib_nl_handle_set_timeout,
 847                 .module = THIS_MODULE },
 848 };
 849
 850 static void free_sm_ah(struct kref *kref)
 851 {
 852         struct ib_sa_sm_ah *sm_ah = container_of(kref, struct ib_sa_sm_ah, ref);
 853
 854         ib_destroy_ah(sm_ah->ah);
 855         kfree(sm_ah);
 856 }
 857
 858 static void update_sm_ah(struct work_struct *work)
 859 {
 860         struct ib_sa_port *port =
 861                 container_of(work, struct ib_sa_port, update_task);
 862         struct ib_sa_sm_ah *new_ah;
 863         struct ib_port_attr port_attr;
 864         struct ib_ah_attr   ah_attr;
 865
 866         if (ib_query_port(port->agent->device, port->port_num, &port_attr)) {
 867                 pr_warn("Couldn't query port\n");
 868                 return;
 869         }
 870
 871         new_ah = kmalloc(sizeof *new_ah, GFP_KERNEL);
 872         if (!new_ah) {
 873                 return;
 874         }
 875
 876         kref_init(&new_ah->ref);
 877         new_ah->src_path_mask = (1 << port_attr.lmc) - 1;
 878
 879         new_ah->pkey_index = 0;
 880         if (ib_find_pkey(port->agent->device, port->port_num,
 881                          IB_DEFAULT_PKEY_FULL, &new_ah->pkey_index))
 882                 pr_err("Couldn't find index for default PKey\n");
 883
 884         memset(&ah_attr, 0, sizeof ah_attr);
 885         ah_attr.dlid     = port_attr.sm_lid;
 886         ah_attr.sl       = port_attr.sm_sl;
 887         ah_attr.port_num = port->port_num;
 888
 889         new_ah->ah = ib_create_ah(port->agent->qp->pd, &ah_attr);
 890         if (IS_ERR(new_ah->ah)) {
 891                 pr_warn("Couldn't create new SM AH\n");
 892                 kfree(new_ah);
 893                 return;
 894         }
 895
 896         spin_lock_irq(&port->ah_lock);
 897         if (port->sm_ah)
 898                 kref_put(&port->sm_ah->ref, free_sm_ah);
 899         port->sm_ah = new_ah;
 900         spin_unlock_irq(&port->ah_lock);
 901
 902 }
 903
 904 static void ib_sa_event(struct ib_event_handler *handler, struct ib_event *event)
 905 {
 906         if (event->event == IB_EVENT_PORT_ERR    ||
 907             event->event == IB_EVENT_PORT_ACTIVE ||
 908             event->event == IB_EVENT_LID_CHANGE  ||
 909             event->event == IB_EVENT_PKEY_CHANGE ||
 910             event->event == IB_EVENT_SM_CHANGE   ||
 911             event->event == IB_EVENT_CLIENT_REREGISTER) {
 912                 unsigned long flags;
 913                 struct ib_sa_device *sa_dev =
 914                         container_of(handler, typeof(*sa_dev), event_handler);
 915                 struct ib_sa_port *port =
 916                         &sa_dev->port[event->element.port_num - sa_dev->start_port];
 917
 918                 if (!rdma_cap_ib_sa(handler->device, port->port_num))
 919                         return;
 920
 921                 spin_lock_irqsave(&port->ah_lock, flags);
 922                 if (port->sm_ah)
 923                         kref_put(&port->sm_ah->ref, free_sm_ah);
 924                 port->sm_ah = NULL;
 925                 spin_unlock_irqrestore(&port->ah_lock, flags);
 926
 927                 queue_work(ib_wq, &sa_dev->port[event->element.port_num -
 928                                             sa_dev->start_port].update_task);
 929         }
 930 }
 931
 932 void ib_sa_register_client(struct ib_sa_client *client)
 933 {
 934         atomic_set(&client->users, 1);
 935         init_completion(&client->comp);
 936 }
 937 EXPORT_SYMBOL(ib_sa_register_client);
 938
 939 void ib_sa_unregister_client(struct ib_sa_client *client)
 940 {
 941         ib_sa_client_put(client);
 942         wait_for_completion(&client->comp);
 943 }
 944 EXPORT_SYMBOL(ib_sa_unregister_client);
 945
 946 /**
 947  * ib_sa_cancel_query - try to cancel an SA query
 948  * @id:ID of query to cancel
 949  * @query:query pointer to cancel
 950  *
 951  * Try to cancel an SA query.  If the id and query don't match up or
 952  * the query has already completed, nothing is done.  Otherwise the
 953  * query is canceled and will complete with a status of -EINTR.
 954  */
 955 void ib_sa_cancel_query(int id, struct ib_sa_query *query)
 956 {
 957         unsigned long flags;
 958         struct ib_mad_agent *agent;
 959         struct ib_mad_send_buf *mad_buf;
 960
 961         spin_lock_irqsave(&idr_lock, flags);
 962         if (idr_find(&query_idr, id) != query) {
 963                 spin_unlock_irqrestore(&idr_lock, flags);
 964                 return;
 965         }
 966         agent = query->port->agent;
 967         mad_buf = query->mad_buf;
 968         spin_unlock_irqrestore(&idr_lock, flags);
 969
 970         /*
 971          * If the query is still on the netlink request list, schedule
 972          * it to be cancelled by the timeout routine. Otherwise, it has been
 973          * sent to the MAD layer and has to be cancelled from there.
 974          */
 975         if (!ib_nl_cancel_request(query))
 976                 ib_cancel_mad(agent, mad_buf);
 977 }
 978 EXPORT_SYMBOL(ib_sa_cancel_query);
 979
 980 static u8 get_src_path_mask(struct ib_device *device, u8 port_num)
 981 {
 982         struct ib_sa_device *sa_dev;
 983         struct ib_sa_port   *port;
 984         unsigned long flags;
 985         u8 src_path_mask;
 986
 987         sa_dev = ib_get_client_data(device, &sa_client);
 988         if (!sa_dev)
 989                 return 0x7f;
 990
 991         port  = &sa_dev->port[port_num - sa_dev->start_port];
 992         spin_lock_irqsave(&port->ah_lock, flags);
 993         src_path_mask = port->sm_ah ? port->sm_ah->src_path_mask : 0x7f;
 994         spin_unlock_irqrestore(&port->ah_lock, flags);
 995
 996         return src_path_mask;
 997 }
 998
 999 int ib_init_ah_from_path(struct ib_device *device, u8 port_num,
1000                          struct ib_sa_path_rec *rec, struct ib_ah_attr *ah_attr)
1001 {
1002         int ret;
1003         u16 gid_index;
1004         int use_roce;
1005         struct net_device *ndev = NULL;
1006
1007         memset(ah_attr, 0, sizeof *ah_attr);
1008         ah_attr->dlid = be16_to_cpu(rec->dlid);
1009         ah_attr->sl = rec->sl;
1010         ah_attr->src_path_bits = be16_to_cpu(rec->slid) &
1011                                  get_src_path_mask(device, port_num);
1012         ah_attr->port_num = port_num;
1013         ah_attr->static_rate = rec->rate;
1014
1015         use_roce = rdma_cap_eth_ah(device, port_num);
1016
1017         if (use_roce) {
1018                 struct net_device *idev;
1019                 struct net_device *resolved_dev;
1020                 struct rdma_dev_addr dev_addr = {.bound_dev_if = rec->ifindex,
1021                                                  .net = rec->net ? rec->net :
1022                                                          &init_net};
1023                 union {
1024                         struct sockaddr     _sockaddr;
1025                         struct sockaddr_in  _sockaddr_in;
1026                         struct sockaddr_in6 _sockaddr_in6;
1027                 } sgid_addr, dgid_addr;
1028
1029                 if (!device->get_netdev)
1030                         return -EOPNOTSUPP;
1031
1032                 rdma_gid2ip(&sgid_addr._sockaddr, &rec->sgid);
1033                 rdma_gid2ip(&dgid_addr._sockaddr, &rec->dgid);
1034
1035                 /* validate the route */
1036                 ret = rdma_resolve_ip_route(&sgid_addr._sockaddr,
1037                                             &dgid_addr._sockaddr, &dev_addr);
1038                 if (ret)
1039                         return ret;
1040
1041                 if ((dev_addr.network == RDMA_NETWORK_IPV4 ||
1042                      dev_addr.network == RDMA_NETWORK_IPV6) &&
1043                     rec->gid_type != IB_GID_TYPE_ROCE_UDP_ENCAP)
1044                         return -EINVAL;
1045
1046                 idev = device->get_netdev(device, port_num);
1047                 if (!idev)
1048                         return -ENODEV;
1049
1050                 resolved_dev = dev_get_by_index(dev_addr.net,
1051                                                 dev_addr.bound_dev_if);
1052                 if (resolved_dev->flags & IFF_LOOPBACK) {
1053                         dev_put(resolved_dev);
1054                         resolved_dev = idev;
1055                         dev_hold(resolved_dev);
1056                 }
1057                 ndev = ib_get_ndev_from_path(rec);
1058                 rcu_read_lock();
1059                 if ((ndev && ndev != resolved_dev) ||
1060                     (resolved_dev != idev &&
1061                      !rdma_is_upper_dev_rcu(idev, resolved_dev)))
1062                         ret = -EHOSTUNREACH;
1063                 rcu_read_unlock();
1064                 dev_put(idev);
1065                 dev_put(resolved_dev);
1066                 if (ret) {
1067                         if (ndev)
1068                                 dev_put(ndev);
1069                         return ret;
1070                 }
1071         }
1072
1073         if (rec->hop_limit > 0 || use_roce) {
1074                 ah_attr->ah_flags = IB_AH_GRH;
1075                 ah_attr->grh.dgid = rec->dgid;
1076
1077                 ret = ib_find_cached_gid_by_port(device, &rec->sgid,
1078                                                  rec->gid_type, port_num, ndev,
1079                                                  &gid_index);
1080                 if (ret) {
1081                         if (ndev)
1082                                 dev_put(ndev);
1083                         return ret;
1084                 }
1085
1086                 ah_attr->grh.sgid_index    = gid_index;
1087                 ah_attr->grh.flow_label    = be32_to_cpu(rec->flow_label);
1088                 ah_attr->grh.hop_limit     = rec->hop_limit;
1089                 ah_attr->grh.traffic_class = rec->traffic_class;
1090                 if (ndev)
1091                         dev_put(ndev);
1092         }
1093
1094         if (use_roce)
1095                 memcpy(ah_attr->dmac, rec->dmac, ETH_ALEN);
1096
1097         return 0;
1098 }
1099 EXPORT_SYMBOL(ib_init_ah_from_path);
1100
1101 static int alloc_mad(struct ib_sa_query *query, gfp_t gfp_mask)
1102 {
1103         unsigned long flags;
1104
1105         spin_lock_irqsave(&query->port->ah_lock, flags);
1106         if (!query->port->sm_ah) {
1107                 spin_unlock_irqrestore(&query->port->ah_lock, flags);
1108                 return -EAGAIN;
1109         }
1110         kref_get(&query->port->sm_ah->ref);
1111         query->sm_ah = query->port->sm_ah;
1112         spin_unlock_irqrestore(&query->port->ah_lock, flags);
1113
1114         query->mad_buf = ib_create_send_mad(query->port->agent, 1,
1115                                             query->sm_ah->pkey_index,
1116                                             0, IB_MGMT_SA_HDR, IB_MGMT_SA_DATA,
1117                                             gfp_mask,
1118                                             IB_MGMT_BASE_VERSION);
1119         if (IS_ERR(query->mad_buf)) {
1120                 kref_put(&query->sm_ah->ref, free_sm_ah);
1121                 return -ENOMEM;
1122         }
1123
1124         query->mad_buf->ah = query->sm_ah->ah;
1125
1126         return 0;
1127 }
1128
1129 static void free_mad(struct ib_sa_query *query)
1130 {
1131         ib_free_send_mad(query->mad_buf);
1132         kref_put(&query->sm_ah->ref, free_sm_ah);
1133 }
1134
1135 static void init_mad(struct ib_sa_mad *mad, struct ib_mad_agent *agent)
1136 {
1137         unsigned long flags;
1138
1139         memset(mad, 0, sizeof *mad);
1140
1141         mad->mad_hdr.base_version  = IB_MGMT_BASE_VERSION;
1142         mad->mad_hdr.mgmt_class    = IB_MGMT_CLASS_SUBN_ADM;
1143         mad->mad_hdr.class_version = IB_SA_CLASS_VERSION;
1144
1145         spin_lock_irqsave(&tid_lock, flags);
1146         mad->mad_hdr.tid           =
1147                 cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++);
1148         spin_unlock_irqrestore(&tid_lock, flags);
1149 }
1150
1151 static int send_mad(struct ib_sa_query *query, int timeout_ms, gfp_t gfp_mask)
1152 {
1153         bool preload = gfpflags_allow_blocking(gfp_mask);
1154         unsigned long flags;
1155         int ret, id;
1156
1157         if (preload)
1158                 idr_preload(gfp_mask);
1159         spin_lock_irqsave(&idr_lock, flags);
1160
1161         id = idr_alloc(&query_idr, query, 0, 0, GFP_NOWAIT);
1162
1163         spin_unlock_irqrestore(&idr_lock, flags);
1164         if (preload)
1165                 idr_preload_end();
1166         if (id < 0)
1167                 return id;
1168
1169         query->mad_buf->timeout_ms  = timeout_ms;
1170         query->mad_buf->context[0] = query;
1171         query->id = id;
1172
1173         if (query->flags & IB_SA_ENABLE_LOCAL_SERVICE) {
1174                 if (!ibnl_chk_listeners(RDMA_NL_GROUP_LS)) {
1175                         if (!ib_nl_make_request(query, gfp_mask))
1176                                 return id;
1177                 }
1178                 ib_sa_disable_local_svc(query);
1179         }
1180
1181         ret = ib_post_send_mad(query->mad_buf, NULL);
1182         if (ret) {
1183                 spin_lock_irqsave(&idr_lock, flags);
1184                 idr_remove(&query_idr, id);
1185                 spin_unlock_irqrestore(&idr_lock, flags);
1186         }
1187
1188         /*
1189          * It's not safe to dereference query any more, because the
1190          * send may already have completed and freed the query in
1191          * another context.
1192          */
1193         return ret ? ret : id;
1194 }
1195
1196 void ib_sa_unpack_path(void *attribute, struct ib_sa_path_rec *rec)
1197 {
1198         ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table), attribute, rec);
1199 }
1200 EXPORT_SYMBOL(ib_sa_unpack_path);
1201
1202 void ib_sa_pack_path(struct ib_sa_path_rec *rec, void *attribute)
1203 {
1204         ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, attribute);
1205 }
1206 EXPORT_SYMBOL(ib_sa_pack_path);
1207
1208 static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query,
1209                                     int status,
1210                                     struct ib_sa_mad *mad)
1211 {
1212         struct ib_sa_path_query *query =
1213                 container_of(sa_query, struct ib_sa_path_query, sa_query);
1214
1215         if (mad) {
1216                 struct ib_sa_path_rec rec;
1217
1218                 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table),
1219                           mad->data, &rec);
1220                 rec.net = NULL;
1221                 rec.ifindex = 0;
1222                 rec.gid_type = IB_GID_TYPE_IB;
1223                 eth_zero_addr(rec.dmac);
1224                 query->callback(status, &rec, query->context);
1225         } else
1226                 query->callback(status, NULL, query->context);
1227 }
1228
1229 static void ib_sa_path_rec_release(struct ib_sa_query *sa_query)
1230 {
1231         kfree(container_of(sa_query, struct ib_sa_path_query, sa_query));
1232 }
1233
1234 /**
1235  * ib_sa_path_rec_get - Start a Path get query
1236  * @client:SA client
1237  * @device:device to send query on
1238  * @port_num: port number to send query on
1239  * @rec:Path Record to send in query
1240  * @comp_mask:component mask to send in query
1241  * @timeout_ms:time to wait for response
1242  * @gfp_mask:GFP mask to use for internal allocations
1243  * @callback:function called when query completes, times out or is
1244  * canceled
1245  * @context:opaque user context passed to callback
1246  * @sa_query:query context, used to cancel query
1247  *
1248  * Send a Path Record Get query to the SA to look up a path.  The
1249  * callback function will be called when the query completes (or
1250  * fails); status is 0 for a successful response, -EINTR if the query
1251  * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
1252  * occurred sending the query.  The resp parameter of the callback is
1253  * only valid if status is 0.
1254  *
1255  * If the return value of ib_sa_path_rec_get() is negative, it is an
1256  * error code.  Otherwise it is a query ID that can be used to cancel
1257  * the query.
1258  */
1259 int ib_sa_path_rec_get(struct ib_sa_client *client,
1260                        struct ib_device *device, u8 port_num,
1261                        struct ib_sa_path_rec *rec,
1262                        ib_sa_comp_mask comp_mask,
1263                        int timeout_ms, gfp_t gfp_mask,
1264                        void (*callback)(int status,
1265                                         struct ib_sa_path_rec *resp,
1266                                         void *context),
1267                        void *context,
1268                        struct ib_sa_query **sa_query)
1269 {
1270         struct ib_sa_path_query *query;
1271         struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1272         struct ib_sa_port   *port;
1273         struct ib_mad_agent *agent;
1274         struct ib_sa_mad *mad;
1275         int ret;
1276
1277         if (!sa_dev)
1278                 return -ENODEV;
1279
1280         port  = &sa_dev->port[port_num - sa_dev->start_port];
1281         agent = port->agent;
1282
1283         query = kzalloc(sizeof(*query), gfp_mask);
1284         if (!query)
1285                 return -ENOMEM;
1286
1287         query->sa_query.port     = port;
1288         ret = alloc_mad(&query->sa_query, gfp_mask);
1289         if (ret)
1290                 goto err1;
1291
1292         ib_sa_client_get(client);
1293         query->sa_query.client = client;
1294         query->callback        = callback;
1295         query->context         = context;
1296
1297         mad = query->sa_query.mad_buf->mad;
1298         init_mad(mad, agent);
1299
1300         query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL;
1301         query->sa_query.release  = ib_sa_path_rec_release;
1302         mad->mad_hdr.method      = IB_MGMT_METHOD_GET;
1303         mad->mad_hdr.attr_id     = cpu_to_be16(IB_SA_ATTR_PATH_REC);
1304         mad->sa_hdr.comp_mask    = comp_mask;
1305
1306         ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, mad->data);
1307
1308         *sa_query = &query->sa_query;
1309
1310         query->sa_query.flags |= IB_SA_ENABLE_LOCAL_SERVICE;
1311         query->sa_query.mad_buf->context[1] = rec;
1312
1313         ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1314         if (ret < 0)
1315                 goto err2;
1316
1317         return ret;
1318
1319 err2:
1320         *sa_query = NULL;
1321         ib_sa_client_put(query->sa_query.client);
1322         free_mad(&query->sa_query);
1323
1324 err1:
1325         kfree(query);
1326         return ret;
1327 }
1328 EXPORT_SYMBOL(ib_sa_path_rec_get);
1329
1330 static void ib_sa_service_rec_callback(struct ib_sa_query *sa_query,
1331                                     int status,
1332                                     struct ib_sa_mad *mad)
1333 {
1334         struct ib_sa_service_query *query =
1335                 container_of(sa_query, struct ib_sa_service_query, sa_query);
1336
1337         if (mad) {
1338                 struct ib_sa_service_rec rec;
1339
1340                 ib_unpack(service_rec_table, ARRAY_SIZE(service_rec_table),
1341                           mad->data, &rec);
1342                 query->callback(status, &rec, query->context);
1343         } else
1344                 query->callback(status, NULL, query->context);
1345 }
1346
1347 static void ib_sa_service_rec_release(struct ib_sa_query *sa_query)
1348 {
1349         kfree(container_of(sa_query, struct ib_sa_service_query, sa_query));
1350 }
1351
1352 /**
1353  * ib_sa_service_rec_query - Start Service Record operation
1354  * @client:SA client
1355  * @device:device to send request on
1356  * @port_num: port number to send request on
1357  * @method:SA method - should be get, set, or delete
1358  * @rec:Service Record to send in request
1359  * @comp_mask:component mask to send in request
1360  * @timeout_ms:time to wait for response
1361  * @gfp_mask:GFP mask to use for internal allocations
1362  * @callback:function called when request completes, times out or is
1363  * canceled
1364  * @context:opaque user context passed to callback
1365  * @sa_query:request context, used to cancel request
1366  *
1367  * Send a Service Record set/get/delete to the SA to register,
1368  * unregister or query a service record.
1369  * The callback function will be called when the request completes (or
1370  * fails); status is 0 for a successful response, -EINTR if the query
1371  * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
1372  * occurred sending the query.  The resp parameter of the callback is
1373  * only valid if status is 0.
1374  *
1375  * If the return value of ib_sa_service_rec_query() is negative, it is an
1376  * error code.  Otherwise it is a request ID that can be used to cancel
1377  * the query.
1378  */
1379 int ib_sa_service_rec_query(struct ib_sa_client *client,
1380                             struct ib_device *device, u8 port_num, u8 method,
1381                             struct ib_sa_service_rec *rec,
1382                             ib_sa_comp_mask comp_mask,
1383                             int timeout_ms, gfp_t gfp_mask,
1384                             void (*callback)(int status,
1385                                              struct ib_sa_service_rec *resp,
1386                                              void *context),
1387                             void *context,
1388                             struct ib_sa_query **sa_query)
1389 {
1390         struct ib_sa_service_query *query;
1391         struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1392         struct ib_sa_port   *port;
1393         struct ib_mad_agent *agent;
1394         struct ib_sa_mad *mad;
1395         int ret;
1396
1397         if (!sa_dev)
1398                 return -ENODEV;
1399
1400         port  = &sa_dev->port[port_num - sa_dev->start_port];
1401         agent = port->agent;
1402
1403         if (method != IB_MGMT_METHOD_GET &&
1404             method != IB_MGMT_METHOD_SET &&
1405             method != IB_SA_METHOD_DELETE)
1406                 return -EINVAL;
1407
1408         query = kzalloc(sizeof(*query), gfp_mask);
1409         if (!query)
1410                 return -ENOMEM;
1411
1412         query->sa_query.port     = port;
1413         ret = alloc_mad(&query->sa_query, gfp_mask);
1414         if (ret)
1415                 goto err1;
1416
1417         ib_sa_client_get(client);
1418         query->sa_query.client = client;
1419         query->callback        = callback;
1420         query->context         = context;
1421
1422         mad = query->sa_query.mad_buf->mad;
1423         init_mad(mad, agent);
1424
1425         query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL;
1426         query->sa_query.release  = ib_sa_service_rec_release;
1427         mad->mad_hdr.method      = method;
1428         mad->mad_hdr.attr_id     = cpu_to_be16(IB_SA_ATTR_SERVICE_REC);
1429         mad->sa_hdr.comp_mask    = comp_mask;
1430
1431         ib_pack(service_rec_table, ARRAY_SIZE(service_rec_table),
1432                 rec, mad->data);
1433
1434         *sa_query = &query->sa_query;
1435
1436         ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1437         if (ret < 0)
1438                 goto err2;
1439
1440         return ret;
1441
1442 err2:
1443         *sa_query = NULL;
1444         ib_sa_client_put(query->sa_query.client);
1445         free_mad(&query->sa_query);
1446
1447 err1:
1448         kfree(query);
1449         return ret;
1450 }
1451 EXPORT_SYMBOL(ib_sa_service_rec_query);
1452
1453 static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query,
1454                                         int status,
1455                                         struct ib_sa_mad *mad)
1456 {
1457         struct ib_sa_mcmember_query *query =
1458                 container_of(sa_query, struct ib_sa_mcmember_query, sa_query);
1459
1460         if (mad) {
1461                 struct ib_sa_mcmember_rec rec;
1462
1463                 ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
1464                           mad->data, &rec);
1465                 query->callback(status, &rec, query->context);
1466         } else
1467                 query->callback(status, NULL, query->context);
1468 }
1469
1470 static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query)
1471 {
1472         kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query));
1473 }
1474
1475 int ib_sa_mcmember_rec_query(struct ib_sa_client *client,
1476                              struct ib_device *device, u8 port_num,
1477                              u8 method,
1478                              struct ib_sa_mcmember_rec *rec,
1479                              ib_sa_comp_mask comp_mask,
1480                              int timeout_ms, gfp_t gfp_mask,
1481                              void (*callback)(int status,
1482                                               struct ib_sa_mcmember_rec *resp,
1483                                               void *context),
1484                              void *context,
1485                              struct ib_sa_query **sa_query)
1486 {
1487         struct ib_sa_mcmember_query *query;
1488         struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1489         struct ib_sa_port   *port;
1490         struct ib_mad_agent *agent;
1491         struct ib_sa_mad *mad;
1492         int ret;
1493
1494         if (!sa_dev)
1495                 return -ENODEV;
1496
1497         port  = &sa_dev->port[port_num - sa_dev->start_port];
1498         agent = port->agent;
1499
1500         query = kzalloc(sizeof(*query), gfp_mask);
1501         if (!query)
1502                 return -ENOMEM;
1503
1504         query->sa_query.port     = port;
1505         ret = alloc_mad(&query->sa_query, gfp_mask);
1506         if (ret)
1507                 goto err1;
1508
1509         ib_sa_client_get(client);
1510         query->sa_query.client = client;
1511         query->callback        = callback;
1512         query->context         = context;
1513
1514         mad = query->sa_query.mad_buf->mad;
1515         init_mad(mad, agent);
1516
1517         query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL;
1518         query->sa_query.release  = ib_sa_mcmember_rec_release;
1519         mad->mad_hdr.method      = method;
1520         mad->mad_hdr.attr_id     = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC);
1521         mad->sa_hdr.comp_mask    = comp_mask;
1522
1523         ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
1524                 rec, mad->data);
1525
1526         *sa_query = &query->sa_query;
1527
1528         ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1529         if (ret < 0)
1530                 goto err2;
1531
1532         return ret;
1533
1534 err2:
1535         *sa_query = NULL;
1536         ib_sa_client_put(query->sa_query.client);
1537         free_mad(&query->sa_query);
1538
1539 err1:
1540         kfree(query);
1541         return ret;
1542 }
1543
1544 /* Support GuidInfoRecord */
1545 static void ib_sa_guidinfo_rec_callback(struct ib_sa_query *sa_query,
1546                                         int status,
1547                                         struct ib_sa_mad *mad)
1548 {
1549         struct ib_sa_guidinfo_query *query =
1550                 container_of(sa_query, struct ib_sa_guidinfo_query, sa_query);
1551
1552         if (mad) {
1553                 struct ib_sa_guidinfo_rec rec;
1554
1555                 ib_unpack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table),
1556                           mad->data, &rec);
1557                 query->callback(status, &rec, query->context);
1558         } else
1559                 query->callback(status, NULL, query->context);
1560 }
1561
1562 static void ib_sa_guidinfo_rec_release(struct ib_sa_query *sa_query)
1563 {
1564         kfree(container_of(sa_query, struct ib_sa_guidinfo_query, sa_query));
1565 }
1566
1567 int ib_sa_guid_info_rec_query(struct ib_sa_client *client,
1568                               struct ib_device *device, u8 port_num,
1569                               struct ib_sa_guidinfo_rec *rec,
1570                               ib_sa_comp_mask comp_mask, u8 method,
1571                               int timeout_ms, gfp_t gfp_mask,
1572                               void (*callback)(int status,
1573                                                struct ib_sa_guidinfo_rec *resp,
1574                                                void *context),
1575                               void *context,
1576                               struct ib_sa_query **sa_query)
1577 {
1578         struct ib_sa_guidinfo_query *query;
1579         struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1580         struct ib_sa_port *port;
1581         struct ib_mad_agent *agent;
1582         struct ib_sa_mad *mad;
1583         int ret;
1584
1585         if (!sa_dev)
1586                 return -ENODEV;
1587
1588         if (method != IB_MGMT_METHOD_GET &&
1589             method != IB_MGMT_METHOD_SET &&
1590             method != IB_SA_METHOD_DELETE) {
1591                 return -EINVAL;
1592         }
1593
1594         port  = &sa_dev->port[port_num - sa_dev->start_port];
1595         agent = port->agent;
1596
1597         query = kzalloc(sizeof(*query), gfp_mask);
1598         if (!query)
1599                 return -ENOMEM;
1600
1601         query->sa_query.port = port;
1602         ret = alloc_mad(&query->sa_query, gfp_mask);
1603         if (ret)
1604                 goto err1;
1605
1606         ib_sa_client_get(client);
1607         query->sa_query.client = client;
1608         query->callback        = callback;
1609         query->context         = context;
1610
1611         mad = query->sa_query.mad_buf->mad;
1612         init_mad(mad, agent);
1613
1614         query->sa_query.callback = callback ? ib_sa_guidinfo_rec_callback : NULL;
1615         query->sa_query.release  = ib_sa_guidinfo_rec_release;
1616
1617         mad->mad_hdr.method      = method;
1618         mad->mad_hdr.attr_id     = cpu_to_be16(IB_SA_ATTR_GUID_INFO_REC);
1619         mad->sa_hdr.comp_mask    = comp_mask;
1620
1621         ib_pack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table), rec,
1622                 mad->data);
1623
1624         *sa_query = &query->sa_query;
1625
1626         ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1627         if (ret < 0)
1628                 goto err2;
1629
1630         return ret;
1631
1632 err2:
1633         *sa_query = NULL;
1634         ib_sa_client_put(query->sa_query.client);
1635         free_mad(&query->sa_query);
1636
1637 err1:
1638         kfree(query);
1639         return ret;
1640 }
1641 EXPORT_SYMBOL(ib_sa_guid_info_rec_query);
1642
1643 static void send_handler(struct ib_mad_agent *agent,
1644                          struct ib_mad_send_wc *mad_send_wc)
1645 {
1646         struct ib_sa_query *query = mad_send_wc->send_buf->context[0];
1647         unsigned long flags;
1648
1649         if (query->callback)
1650                 switch (mad_send_wc->status) {
1651                 case IB_WC_SUCCESS:
1652                         /* No callback -- already got recv */
1653                         break;
1654                 case IB_WC_RESP_TIMEOUT_ERR:
1655                         query->callback(query, -ETIMEDOUT, NULL);
1656                         break;
1657                 case IB_WC_WR_FLUSH_ERR:
1658                         query->callback(query, -EINTR, NULL);
1659                         break;
1660                 default:
1661                         query->callback(query, -EIO, NULL);
1662                         break;
1663                 }
1664
1665         spin_lock_irqsave(&idr_lock, flags);
1666         idr_remove(&query_idr, query->id);
1667         spin_unlock_irqrestore(&idr_lock, flags);
1668
1669         free_mad(query);
1670         ib_sa_client_put(query->client);
1671         query->release(query);
1672 }
1673
1674 static void recv_handler(struct ib_mad_agent *mad_agent,
1675                          struct ib_mad_send_buf *send_buf,
1676                          struct ib_mad_recv_wc *mad_recv_wc)
1677 {
1678         struct ib_sa_query *query;
1679
1680         if (!send_buf)
1681                 return;
1682
1683         query = send_buf->context[0];
1684         if (query->callback) {
1685                 if (mad_recv_wc->wc->status == IB_WC_SUCCESS)
1686                         query->callback(query,
1687                                         mad_recv_wc->recv_buf.mad->mad_hdr.status ?
1688                                         -EINVAL : 0,
1689                                         (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad);
1690                 else
1691                         query->callback(query, -EIO, NULL);
1692         }
1693
1694         ib_free_recv_mad(mad_recv_wc);
1695 }
1696
1697 static void ib_sa_add_one(struct ib_device *device)
1698 {
1699         struct ib_sa_device *sa_dev;
1700         int s, e, i;
1701         int count = 0;
1702
1703         s = rdma_start_port(device);
1704         e = rdma_end_port(device);
1705
1706         sa_dev = kzalloc(sizeof *sa_dev +
1707                          (e - s + 1) * sizeof (struct ib_sa_port),
1708                          GFP_KERNEL);
1709         if (!sa_dev)
1710                 return;
1711
1712         sa_dev->start_port = s;
1713         sa_dev->end_port   = e;
1714
1715         for (i = 0; i <= e - s; ++i) {
1716                 spin_lock_init(&sa_dev->port[i].ah_lock);
1717                 if (!rdma_cap_ib_sa(device, i + 1))
1718                         continue;
1719
1720                 sa_dev->port[i].sm_ah    = NULL;
1721                 sa_dev->port[i].port_num = i + s;
1722
1723                 sa_dev->port[i].agent =
1724                         ib_register_mad_agent(device, i + s, IB_QPT_GSI,
1725                                               NULL, 0, send_handler,
1726                                               recv_handler, sa_dev, 0);
1727                 if (IS_ERR(sa_dev->port[i].agent))
1728                         goto err;
1729
1730                 INIT_WORK(&sa_dev->port[i].update_task, update_sm_ah);
1731
1732                 count++;
1733         }
1734
1735         if (!count)
1736                 goto free;
1737
1738         ib_set_client_data(device, &sa_client, sa_dev);
1739
1740         /*
1741          * We register our event handler after everything is set up,
1742          * and then update our cached info after the event handler is
1743          * registered to avoid any problems if a port changes state
1744          * during our initialization.
1745          */
1746
1747         INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event);
1748         if (ib_register_event_handler(&sa_dev->event_handler))
1749                 goto err;
1750
1751         for (i = 0; i <= e - s; ++i) {
1752                 if (rdma_cap_ib_sa(device, i + 1))
1753                         update_sm_ah(&sa_dev->port[i].update_task);
1754         }
1755
1756         return;
1757
1758 err:
1759         while (--i >= 0) {
1760                 if (rdma_cap_ib_sa(device, i + 1))
1761                         ib_unregister_mad_agent(sa_dev->port[i].agent);
1762         }
1763 free:
1764         kfree(sa_dev);
1765         return;
1766 }
1767
1768 static void ib_sa_remove_one(struct ib_device *device, void *client_data)
1769 {
1770         struct ib_sa_device *sa_dev = client_data;
1771         int i;
1772
1773         if (!sa_dev)
1774                 return;
1775
1776         ib_unregister_event_handler(&sa_dev->event_handler);
1777
1778         flush_workqueue(ib_wq);
1779
1780         for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) {
1781                 if (rdma_cap_ib_sa(device, i + 1)) {
1782                         ib_unregister_mad_agent(sa_dev->port[i].agent);
1783                         if (sa_dev->port[i].sm_ah)
1784                                 kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah);
1785                 }
1786
1787         }
1788
1789         kfree(sa_dev);
1790 }
1791
1792 static int __init ib_sa_init(void)
1793 {
1794         int ret;
1795
1796         get_random_bytes(&tid, sizeof tid);
1797
1798         atomic_set(&ib_nl_sa_request_seq, 0);
1799
1800         ret = ib_register_client(&sa_client);
1801         if (ret) {
1802                 pr_err("Couldn't register ib_sa client\n");
1803                 goto err1;
1804         }
1805
1806         ret = mcast_init();
1807         if (ret) {
1808                 pr_err("Couldn't initialize multicast handling\n");
1809                 goto err2;
1810         }
1811
1812         ib_nl_wq = create_singlethread_workqueue("ib_nl_sa_wq");
1813         if (!ib_nl_wq) {
1814                 ret = -ENOMEM;
1815                 goto err3;
1816         }
1817
1818         if (ibnl_add_client(RDMA_NL_LS, RDMA_NL_LS_NUM_OPS,
1819                             ib_sa_cb_table)) {
1820                 pr_err("Failed to add netlink callback\n");
1821                 ret = -EINVAL;
1822                 goto err4;
1823         }
1824         INIT_DELAYED_WORK(&ib_nl_timed_work, ib_nl_request_timeout);
1825
1826         return 0;
1827 err4:
1828         destroy_workqueue(ib_nl_wq);
1829 err3:
1830         mcast_cleanup();
1831 err2:
1832         ib_unregister_client(&sa_client);
1833 err1:
1834         return ret;
1835 }
1836
1837 static void __exit ib_sa_cleanup(void)
1838 {
1839         ibnl_remove_client(RDMA_NL_LS);
1840         cancel_delayed_work(&ib_nl_timed_work);
1841         flush_workqueue(ib_nl_wq);
1842         destroy_workqueue(ib_nl_wq);
1843         mcast_cleanup();
1844         ib_unregister_client(&sa_client);
1845         idr_destroy(&query_idr);
1846 }
1847
1848 module_init(ib_sa_init);
1849 module_exit(ib_sa_cleanup);