linux/drivers/infiniband/core/uverbs_cmd.c
<<
>>
Prefs
   1/*
   2 * Copyright (c) 2005 Topspin Communications.  All rights reserved.
   3 * Copyright (c) 2005, 2006, 2007 Cisco Systems.  All rights reserved.
   4 * Copyright (c) 2005 PathScale, Inc.  All rights reserved.
   5 * Copyright (c) 2006 Mellanox Technologies.  All rights reserved.
   6 *
   7 * This software is available to you under a choice of one of two
   8 * licenses.  You may choose to be licensed under the terms of the GNU
   9 * General Public License (GPL) Version 2, available from the file
  10 * COPYING in the main directory of this source tree, or the
  11 * OpenIB.org BSD license below:
  12 *
  13 *     Redistribution and use in source and binary forms, with or
  14 *     without modification, are permitted provided that the following
  15 *     conditions are met:
  16 *
  17 *      - Redistributions of source code must retain the above
  18 *        copyright notice, this list of conditions and the following
  19 *        disclaimer.
  20 *
  21 *      - Redistributions in binary form must reproduce the above
  22 *        copyright notice, this list of conditions and the following
  23 *        disclaimer in the documentation and/or other materials
  24 *        provided with the distribution.
  25 *
  26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  33 * SOFTWARE.
  34 */
  35
  36#include <linux/file.h>
  37#include <linux/fs.h>
  38
  39#include <asm/uaccess.h>
  40
  41#include "uverbs.h"
  42
  43static struct lock_class_key pd_lock_key;
  44static struct lock_class_key mr_lock_key;
  45static struct lock_class_key cq_lock_key;
  46static struct lock_class_key qp_lock_key;
  47static struct lock_class_key ah_lock_key;
  48static struct lock_class_key srq_lock_key;
  49
  50#define INIT_UDATA(udata, ibuf, obuf, ilen, olen)                       \
  51        do {                                                            \
  52                (udata)->inbuf  = (void __user *) (ibuf);               \
  53                (udata)->outbuf = (void __user *) (obuf);               \
  54                (udata)->inlen  = (ilen);                               \
  55                (udata)->outlen = (olen);                               \
  56        } while (0)
  57
  58/*
  59 * The ib_uobject locking scheme is as follows:
  60 *
  61 * - ib_uverbs_idr_lock protects the uverbs idrs themselves, so it
  62 *   needs to be held during all idr operations.  When an object is
  63 *   looked up, a reference must be taken on the object's kref before
  64 *   dropping this lock.
  65 *
  66 * - Each object also has an rwsem.  This rwsem must be held for
  67 *   reading while an operation that uses the object is performed.
  68 *   For example, while registering an MR, the associated PD's
  69 *   uobject.mutex must be held for reading.  The rwsem must be held
  70 *   for writing while initializing or destroying an object.
  71 *
  72 * - In addition, each object has a "live" flag.  If this flag is not
  73 *   set, then lookups of the object will fail even if it is found in
  74 *   the idr.  This handles a reader that blocks and does not acquire
  75 *   the rwsem until after the object is destroyed.  The destroy
  76 *   operation will set the live flag to 0 and then drop the rwsem;
  77 *   this will allow the reader to acquire the rwsem, see that the
  78 *   live flag is 0, and then drop the rwsem and its reference to
  79 *   object.  The underlying storage will not be freed until the last
  80 *   reference to the object is dropped.
  81 */
  82
  83static void init_uobj(struct ib_uobject *uobj, u64 user_handle,
  84                      struct ib_ucontext *context, struct lock_class_key *key)
  85{
  86        uobj->user_handle = user_handle;
  87        uobj->context     = context;
  88        kref_init(&uobj->ref);
  89        init_rwsem(&uobj->mutex);
  90        lockdep_set_class(&uobj->mutex, key);
  91        uobj->live        = 0;
  92}
  93
  94static void release_uobj(struct kref *kref)
  95{
  96        kfree(container_of(kref, struct ib_uobject, ref));
  97}
  98
  99static void put_uobj(struct ib_uobject *uobj)
 100{
 101        kref_put(&uobj->ref, release_uobj);
 102}
 103
 104static void put_uobj_read(struct ib_uobject *uobj)
 105{
 106        up_read(&uobj->mutex);
 107        put_uobj(uobj);
 108}
 109
 110static void put_uobj_write(struct ib_uobject *uobj)
 111{
 112        up_write(&uobj->mutex);
 113        put_uobj(uobj);
 114}
 115
 116static int idr_add_uobj(struct idr *idr, struct ib_uobject *uobj)
 117{
 118        int ret;
 119
 120retry:
 121        if (!idr_pre_get(idr, GFP_KERNEL))
 122                return -ENOMEM;
 123
 124        spin_lock(&ib_uverbs_idr_lock);
 125        ret = idr_get_new(idr, uobj, &uobj->id);
 126        spin_unlock(&ib_uverbs_idr_lock);
 127
 128        if (ret == -EAGAIN)
 129                goto retry;
 130
 131        return ret;
 132}
 133
 134void idr_remove_uobj(struct idr *idr, struct ib_uobject *uobj)
 135{
 136        spin_lock(&ib_uverbs_idr_lock);
 137        idr_remove(idr, uobj->id);
 138        spin_unlock(&ib_uverbs_idr_lock);
 139}
 140
 141static struct ib_uobject *__idr_get_uobj(struct idr *idr, int id,
 142                                         struct ib_ucontext *context)
 143{
 144        struct ib_uobject *uobj;
 145
 146        spin_lock(&ib_uverbs_idr_lock);
 147        uobj = idr_find(idr, id);
 148        if (uobj) {
 149                if (uobj->context == context)
 150                        kref_get(&uobj->ref);
 151                else
 152                        uobj = NULL;
 153        }
 154        spin_unlock(&ib_uverbs_idr_lock);
 155
 156        return uobj;
 157}
 158
 159static struct ib_uobject *idr_read_uobj(struct idr *idr, int id,
 160                                        struct ib_ucontext *context, int nested)
 161{
 162        struct ib_uobject *uobj;
 163
 164        uobj = __idr_get_uobj(idr, id, context);
 165        if (!uobj)
 166                return NULL;
 167
 168        if (nested)
 169                down_read_nested(&uobj->mutex, SINGLE_DEPTH_NESTING);
 170        else
 171                down_read(&uobj->mutex);
 172        if (!uobj->live) {
 173                put_uobj_read(uobj);
 174                return NULL;
 175        }
 176
 177        return uobj;
 178}
 179
 180static struct ib_uobject *idr_write_uobj(struct idr *idr, int id,
 181                                         struct ib_ucontext *context)
 182{
 183        struct ib_uobject *uobj;
 184
 185        uobj = __idr_get_uobj(idr, id, context);
 186        if (!uobj)
 187                return NULL;
 188
 189        down_write(&uobj->mutex);
 190        if (!uobj->live) {
 191                put_uobj_write(uobj);
 192                return NULL;
 193        }
 194
 195        return uobj;
 196}
 197
 198static void *idr_read_obj(struct idr *idr, int id, struct ib_ucontext *context,
 199                          int nested)
 200{
 201        struct ib_uobject *uobj;
 202
 203        uobj = idr_read_uobj(idr, id, context, nested);
 204        return uobj ? uobj->object : NULL;
 205}
 206
 207static struct ib_pd *idr_read_pd(int pd_handle, struct ib_ucontext *context)
 208{
 209        return idr_read_obj(&ib_uverbs_pd_idr, pd_handle, context, 0);
 210}
 211
 212static void put_pd_read(struct ib_pd *pd)
 213{
 214        put_uobj_read(pd->uobject);
 215}
 216
 217static struct ib_cq *idr_read_cq(int cq_handle, struct ib_ucontext *context, int nested)
 218{
 219        return idr_read_obj(&ib_uverbs_cq_idr, cq_handle, context, nested);
 220}
 221
 222static void put_cq_read(struct ib_cq *cq)
 223{
 224        put_uobj_read(cq->uobject);
 225}
 226
 227static struct ib_ah *idr_read_ah(int ah_handle, struct ib_ucontext *context)
 228{
 229        return idr_read_obj(&ib_uverbs_ah_idr, ah_handle, context, 0);
 230}
 231
 232static void put_ah_read(struct ib_ah *ah)
 233{
 234        put_uobj_read(ah->uobject);
 235}
 236
 237static struct ib_qp *idr_read_qp(int qp_handle, struct ib_ucontext *context)
 238{
 239        return idr_read_obj(&ib_uverbs_qp_idr, qp_handle, context, 0);
 240}
 241
 242static void put_qp_read(struct ib_qp *qp)
 243{
 244        put_uobj_read(qp->uobject);
 245}
 246
 247static struct ib_srq *idr_read_srq(int srq_handle, struct ib_ucontext *context)
 248{
 249        return idr_read_obj(&ib_uverbs_srq_idr, srq_handle, context, 0);
 250}
 251
 252static void put_srq_read(struct ib_srq *srq)
 253{
 254        put_uobj_read(srq->uobject);
 255}
 256
 257ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
 258                              const char __user *buf,
 259                              int in_len, int out_len)
 260{
 261        struct ib_uverbs_get_context      cmd;
 262        struct ib_uverbs_get_context_resp resp;
 263        struct ib_udata                   udata;
 264        struct ib_device                 *ibdev = file->device->ib_dev;
 265        struct ib_ucontext               *ucontext;
 266        struct file                      *filp;
 267        int ret;
 268
 269        if (out_len < sizeof resp)
 270                return -ENOSPC;
 271
 272        if (copy_from_user(&cmd, buf, sizeof cmd))
 273                return -EFAULT;
 274
 275        mutex_lock(&file->mutex);
 276
 277        if (file->ucontext) {
 278                ret = -EINVAL;
 279                goto err;
 280        }
 281
 282        INIT_UDATA(&udata, buf + sizeof cmd,
 283                   (unsigned long) cmd.response + sizeof resp,
 284                   in_len - sizeof cmd, out_len - sizeof resp);
 285
 286        ucontext = ibdev->alloc_ucontext(ibdev, &udata);
 287        if (IS_ERR(ucontext)) {
 288                ret = PTR_ERR(file->ucontext);
 289                goto err;
 290        }
 291
 292        ucontext->device = ibdev;
 293        INIT_LIST_HEAD(&ucontext->pd_list);
 294        INIT_LIST_HEAD(&ucontext->mr_list);
 295        INIT_LIST_HEAD(&ucontext->mw_list);
 296        INIT_LIST_HEAD(&ucontext->cq_list);
 297        INIT_LIST_HEAD(&ucontext->qp_list);
 298        INIT_LIST_HEAD(&ucontext->srq_list);
 299        INIT_LIST_HEAD(&ucontext->ah_list);
 300        ucontext->closing = 0;
 301
 302        resp.num_comp_vectors = file->device->num_comp_vectors;
 303
 304        filp = ib_uverbs_alloc_event_file(file, 1, &resp.async_fd);
 305        if (IS_ERR(filp)) {
 306                ret = PTR_ERR(filp);
 307                goto err_free;
 308        }
 309
 310        if (copy_to_user((void __user *) (unsigned long) cmd.response,
 311                         &resp, sizeof resp)) {
 312                ret = -EFAULT;
 313                goto err_file;
 314        }
 315
 316        file->async_file = filp->private_data;
 317
 318        INIT_IB_EVENT_HANDLER(&file->event_handler, file->device->ib_dev,
 319                              ib_uverbs_event_handler);
 320        ret = ib_register_event_handler(&file->event_handler);
 321        if (ret)
 322                goto err_file;
 323
 324        kref_get(&file->async_file->ref);
 325        kref_get(&file->ref);
 326        file->ucontext = ucontext;
 327
 328        fd_install(resp.async_fd, filp);
 329
 330        mutex_unlock(&file->mutex);
 331
 332        return in_len;
 333
 334err_file:
 335        put_unused_fd(resp.async_fd);
 336        fput(filp);
 337
 338err_free:
 339        ibdev->dealloc_ucontext(ucontext);
 340
 341err:
 342        mutex_unlock(&file->mutex);
 343        return ret;
 344}
 345
 346ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
 347                               const char __user *buf,
 348                               int in_len, int out_len)
 349{
 350        struct ib_uverbs_query_device      cmd;
 351        struct ib_uverbs_query_device_resp resp;
 352        struct ib_device_attr              attr;
 353        int                                ret;
 354
 355        if (out_len < sizeof resp)
 356                return -ENOSPC;
 357
 358        if (copy_from_user(&cmd, buf, sizeof cmd))
 359                return -EFAULT;
 360
 361        ret = ib_query_device(file->device->ib_dev, &attr);
 362        if (ret)
 363                return ret;
 364
 365        memset(&resp, 0, sizeof resp);
 366
 367        resp.fw_ver                    = attr.fw_ver;
 368        resp.node_guid                 = file->device->ib_dev->node_guid;
 369        resp.sys_image_guid            = attr.sys_image_guid;
 370        resp.max_mr_size               = attr.max_mr_size;
 371        resp.page_size_cap             = attr.page_size_cap;
 372        resp.vendor_id                 = attr.vendor_id;
 373        resp.vendor_part_id            = attr.vendor_part_id;
 374        resp.hw_ver                    = attr.hw_ver;
 375        resp.max_qp                    = attr.max_qp;
 376        resp.max_qp_wr                 = attr.max_qp_wr;
 377        resp.device_cap_flags          = attr.device_cap_flags;
 378        resp.max_sge                   = attr.max_sge;
 379        resp.max_sge_rd                = attr.max_sge_rd;
 380        resp.max_cq                    = attr.max_cq;
 381        resp.max_cqe                   = attr.max_cqe;
 382        resp.max_mr                    = attr.max_mr;
 383        resp.max_pd                    = attr.max_pd;
 384        resp.max_qp_rd_atom            = attr.max_qp_rd_atom;
 385        resp.max_ee_rd_atom            = attr.max_ee_rd_atom;
 386        resp.max_res_rd_atom           = attr.max_res_rd_atom;
 387        resp.max_qp_init_rd_atom       = attr.max_qp_init_rd_atom;
 388        resp.max_ee_init_rd_atom       = attr.max_ee_init_rd_atom;
 389        resp.atomic_cap                = attr.atomic_cap;
 390        resp.max_ee                    = attr.max_ee;
 391        resp.max_rdd                   = attr.max_rdd;
 392        resp.max_mw                    = attr.max_mw;
 393        resp.max_raw_ipv6_qp           = attr.max_raw_ipv6_qp;
 394        resp.max_raw_ethy_qp           = attr.max_raw_ethy_qp;
 395        resp.max_mcast_grp             = attr.max_mcast_grp;
 396        resp.max_mcast_qp_attach       = attr.max_mcast_qp_attach;
 397        resp.max_total_mcast_qp_attach = attr.max_total_mcast_qp_attach;
 398        resp.max_ah                    = attr.max_ah;
 399        resp.max_fmr                   = attr.max_fmr;
 400        resp.max_map_per_fmr           = attr.max_map_per_fmr;
 401        resp.max_srq                   = attr.max_srq;
 402        resp.max_srq_wr                = attr.max_srq_wr;
 403        resp.max_srq_sge               = attr.max_srq_sge;
 404        resp.max_pkeys                 = attr.max_pkeys;
 405        resp.local_ca_ack_delay        = attr.local_ca_ack_delay;
 406        resp.phys_port_cnt             = file->device->ib_dev->phys_port_cnt;
 407
 408        if (copy_to_user((void __user *) (unsigned long) cmd.response,
 409                         &resp, sizeof resp))
 410                return -EFAULT;
 411
 412        return in_len;
 413}
 414
 415ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
 416                             const char __user *buf,
 417                             int in_len, int out_len)
 418{
 419        struct ib_uverbs_query_port      cmd;
 420        struct ib_uverbs_query_port_resp resp;
 421        struct ib_port_attr              attr;
 422        int                              ret;
 423
 424        if (out_len < sizeof resp)
 425                return -ENOSPC;
 426
 427        if (copy_from_user(&cmd, buf, sizeof cmd))
 428                return -EFAULT;
 429
 430        ret = ib_query_port(file->device->ib_dev, cmd.port_num, &attr);
 431        if (ret)
 432                return ret;
 433
 434        memset(&resp, 0, sizeof resp);
 435
 436        resp.state           = attr.state;
 437        resp.max_mtu         = attr.max_mtu;
 438        resp.active_mtu      = attr.active_mtu;
 439        resp.gid_tbl_len     = attr.gid_tbl_len;
 440        resp.port_cap_flags  = attr.port_cap_flags;
 441        resp.max_msg_sz      = attr.max_msg_sz;
 442        resp.bad_pkey_cntr   = attr.bad_pkey_cntr;
 443        resp.qkey_viol_cntr  = attr.qkey_viol_cntr;
 444        resp.pkey_tbl_len    = attr.pkey_tbl_len;
 445        resp.lid             = attr.lid;
 446        resp.sm_lid          = attr.sm_lid;
 447        resp.lmc             = attr.lmc;
 448        resp.max_vl_num      = attr.max_vl_num;
 449        resp.sm_sl           = attr.sm_sl;
 450        resp.subnet_timeout  = attr.subnet_timeout;
 451        resp.init_type_reply = attr.init_type_reply;
 452        resp.active_width    = attr.active_width;
 453        resp.active_speed    = attr.active_speed;
 454        resp.phys_state      = attr.phys_state;
 455
 456        if (copy_to_user((void __user *) (unsigned long) cmd.response,
 457                         &resp, sizeof resp))
 458                return -EFAULT;
 459
 460        return in_len;
 461}
 462
 463ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
 464                           const char __user *buf,
 465                           int in_len, int out_len)
 466{
 467        struct ib_uverbs_alloc_pd      cmd;
 468        struct ib_uverbs_alloc_pd_resp resp;
 469        struct ib_udata                udata;
 470        struct ib_uobject             *uobj;
 471        struct ib_pd                  *pd;
 472        int                            ret;
 473
 474        if (out_len < sizeof resp)
 475                return -ENOSPC;
 476
 477        if (copy_from_user(&cmd, buf, sizeof cmd))
 478                return -EFAULT;
 479
 480        INIT_UDATA(&udata, buf + sizeof cmd,
 481                   (unsigned long) cmd.response + sizeof resp,
 482                   in_len - sizeof cmd, out_len - sizeof resp);
 483
 484        uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
 485        if (!uobj)
 486                return -ENOMEM;
 487
 488        init_uobj(uobj, 0, file->ucontext, &pd_lock_key);
 489        down_write(&uobj->mutex);
 490
 491        pd = file->device->ib_dev->alloc_pd(file->device->ib_dev,
 492                                            file->ucontext, &udata);
 493        if (IS_ERR(pd)) {
 494                ret = PTR_ERR(pd);
 495                goto err;
 496        }
 497
 498        pd->device  = file->device->ib_dev;
 499        pd->uobject = uobj;
 500        atomic_set(&pd->usecnt, 0);
 501
 502        uobj->object = pd;
 503        ret = idr_add_uobj(&ib_uverbs_pd_idr, uobj);
 504        if (ret)
 505                goto err_idr;
 506
 507        memset(&resp, 0, sizeof resp);
 508        resp.pd_handle = uobj->id;
 509
 510        if (copy_to_user((void __user *) (unsigned long) cmd.response,
 511                         &resp, sizeof resp)) {
 512                ret = -EFAULT;
 513                goto err_copy;
 514        }
 515
 516        mutex_lock(&file->mutex);
 517        list_add_tail(&uobj->list, &file->ucontext->pd_list);
 518        mutex_unlock(&file->mutex);
 519
 520        uobj->live = 1;
 521
 522        up_write(&uobj->mutex);
 523
 524        return in_len;
 525
 526err_copy:
 527        idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
 528
 529err_idr:
 530        ib_dealloc_pd(pd);
 531
 532err:
 533        put_uobj_write(uobj);
 534        return ret;
 535}
 536
 537ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
 538                             const char __user *buf,
 539                             int in_len, int out_len)
 540{
 541        struct ib_uverbs_dealloc_pd cmd;
 542        struct ib_uobject          *uobj;
 543        int                         ret;
 544
 545        if (copy_from_user(&cmd, buf, sizeof cmd))
 546                return -EFAULT;
 547
 548        uobj = idr_write_uobj(&ib_uverbs_pd_idr, cmd.pd_handle, file->ucontext);
 549        if (!uobj)
 550                return -EINVAL;
 551
 552        ret = ib_dealloc_pd(uobj->object);
 553        if (!ret)
 554                uobj->live = 0;
 555
 556        put_uobj_write(uobj);
 557
 558        if (ret)
 559                return ret;
 560
 561        idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
 562
 563        mutex_lock(&file->mutex);
 564        list_del(&uobj->list);
 565        mutex_unlock(&file->mutex);
 566
 567        put_uobj(uobj);
 568
 569        return in_len;
 570}
 571
 572ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
 573                         const char __user *buf, int in_len,
 574                         int out_len)
 575{
 576        struct ib_uverbs_reg_mr      cmd;
 577        struct ib_uverbs_reg_mr_resp resp;
 578        struct ib_udata              udata;
 579        struct ib_uobject           *uobj;
 580        struct ib_pd                *pd;
 581        struct ib_mr                *mr;
 582        int                          ret;
 583
 584        if (out_len < sizeof resp)
 585                return -ENOSPC;
 586
 587        if (copy_from_user(&cmd, buf, sizeof cmd))
 588                return -EFAULT;
 589
 590        INIT_UDATA(&udata, buf + sizeof cmd,
 591                   (unsigned long) cmd.response + sizeof resp,
 592                   in_len - sizeof cmd, out_len - sizeof resp);
 593
 594        if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
 595                return -EINVAL;
 596
 597        /*
 598         * Local write permission is required if remote write or
 599         * remote atomic permission is also requested.
 600         */
 601        if (cmd.access_flags & (IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_REMOTE_WRITE) &&
 602            !(cmd.access_flags & IB_ACCESS_LOCAL_WRITE))
 603                return -EINVAL;
 604
 605        uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
 606        if (!uobj)
 607                return -ENOMEM;
 608
 609        init_uobj(uobj, 0, file->ucontext, &mr_lock_key);
 610        down_write(&uobj->mutex);
 611
 612        pd = idr_read_pd(cmd.pd_handle, file->ucontext);
 613        if (!pd) {
 614                ret = -EINVAL;
 615                goto err_free;
 616        }
 617
 618        mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
 619                                     cmd.access_flags, &udata);
 620        if (IS_ERR(mr)) {
 621                ret = PTR_ERR(mr);
 622                goto err_put;
 623        }
 624
 625        mr->device  = pd->device;
 626        mr->pd      = pd;
 627        mr->uobject = uobj;
 628        atomic_inc(&pd->usecnt);
 629        atomic_set(&mr->usecnt, 0);
 630
 631        uobj->object = mr;
 632        ret = idr_add_uobj(&ib_uverbs_mr_idr, uobj);
 633        if (ret)
 634                goto err_unreg;
 635
 636        memset(&resp, 0, sizeof resp);
 637        resp.lkey      = mr->lkey;
 638        resp.rkey      = mr->rkey;
 639        resp.mr_handle = uobj->id;
 640
 641        if (copy_to_user((void __user *) (unsigned long) cmd.response,
 642                         &resp, sizeof resp)) {
 643                ret = -EFAULT;
 644                goto err_copy;
 645        }
 646
 647        put_pd_read(pd);
 648
 649        mutex_lock(&file->mutex);
 650        list_add_tail(&uobj->list, &file->ucontext->mr_list);
 651        mutex_unlock(&file->mutex);
 652
 653        uobj->live = 1;
 654
 655        up_write(&uobj->mutex);
 656
 657        return in_len;
 658
 659err_copy:
 660        idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
 661
 662err_unreg:
 663        ib_dereg_mr(mr);
 664
 665err_put:
 666        put_pd_read(pd);
 667
 668err_free:
 669        put_uobj_write(uobj);
 670        return ret;
 671}
 672
 673ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
 674                           const char __user *buf, int in_len,
 675                           int out_len)
 676{
 677        struct ib_uverbs_dereg_mr cmd;
 678        struct ib_mr             *mr;
 679        struct ib_uobject        *uobj;
 680        int                       ret = -EINVAL;
 681
 682        if (copy_from_user(&cmd, buf, sizeof cmd))
 683                return -EFAULT;
 684
 685        uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle, file->ucontext);
 686        if (!uobj)
 687                return -EINVAL;
 688
 689        mr = uobj->object;
 690
 691        ret = ib_dereg_mr(mr);
 692        if (!ret)
 693                uobj->live = 0;
 694
 695        put_uobj_write(uobj);
 696
 697        if (ret)
 698                return ret;
 699
 700        idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
 701
 702        mutex_lock(&file->mutex);
 703        list_del(&uobj->list);
 704        mutex_unlock(&file->mutex);
 705
 706        put_uobj(uobj);
 707
 708        return in_len;
 709}
 710
 711ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
 712                                      const char __user *buf, int in_len,
 713                                      int out_len)
 714{
 715        struct ib_uverbs_create_comp_channel       cmd;
 716        struct ib_uverbs_create_comp_channel_resp  resp;
 717        struct file                               *filp;
 718
 719        if (out_len < sizeof resp)
 720                return -ENOSPC;
 721
 722        if (copy_from_user(&cmd, buf, sizeof cmd))
 723                return -EFAULT;
 724
 725        filp = ib_uverbs_alloc_event_file(file, 0, &resp.fd);
 726        if (IS_ERR(filp))
 727                return PTR_ERR(filp);
 728
 729        if (copy_to_user((void __user *) (unsigned long) cmd.response,
 730                         &resp, sizeof resp)) {
 731                put_unused_fd(resp.fd);
 732                fput(filp);
 733                return -EFAULT;
 734        }
 735
 736        fd_install(resp.fd, filp);
 737        return in_len;
 738}
 739
 740ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
 741                            const char __user *buf, int in_len,
 742                            int out_len)
 743{
 744        struct ib_uverbs_create_cq      cmd;
 745        struct ib_uverbs_create_cq_resp resp;
 746        struct ib_udata                 udata;
 747        struct ib_ucq_object           *obj;
 748        struct ib_uverbs_event_file    *ev_file = NULL;
 749        struct ib_cq                   *cq;
 750        int                             ret;
 751
 752        if (out_len < sizeof resp)
 753                return -ENOSPC;
 754
 755        if (copy_from_user(&cmd, buf, sizeof cmd))
 756                return -EFAULT;
 757
 758        INIT_UDATA(&udata, buf + sizeof cmd,
 759                   (unsigned long) cmd.response + sizeof resp,
 760                   in_len - sizeof cmd, out_len - sizeof resp);
 761
 762        if (cmd.comp_vector >= file->device->num_comp_vectors)
 763                return -EINVAL;
 764
 765        obj = kmalloc(sizeof *obj, GFP_KERNEL);
 766        if (!obj)
 767                return -ENOMEM;
 768
 769        init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &cq_lock_key);
 770        down_write(&obj->uobject.mutex);
 771
 772        if (cmd.comp_channel >= 0) {
 773                ev_file = ib_uverbs_lookup_comp_file(cmd.comp_channel);
 774                if (!ev_file) {
 775                        ret = -EINVAL;
 776                        goto err;
 777                }
 778        }
 779
 780        obj->uverbs_file           = file;
 781        obj->comp_events_reported  = 0;
 782        obj->async_events_reported = 0;
 783        INIT_LIST_HEAD(&obj->comp_list);
 784        INIT_LIST_HEAD(&obj->async_list);
 785
 786        cq = file->device->ib_dev->create_cq(file->device->ib_dev, cmd.cqe,
 787                                             cmd.comp_vector,
 788                                             file->ucontext, &udata);
 789        if (IS_ERR(cq)) {
 790                ret = PTR_ERR(cq);
 791                goto err_file;
 792        }
 793
 794        cq->device        = file->device->ib_dev;
 795        cq->uobject       = &obj->uobject;
 796        cq->comp_handler  = ib_uverbs_comp_handler;
 797        cq->event_handler = ib_uverbs_cq_event_handler;
 798        cq->cq_context    = ev_file;
 799        atomic_set(&cq->usecnt, 0);
 800
 801        obj->uobject.object = cq;
 802        ret = idr_add_uobj(&ib_uverbs_cq_idr, &obj->uobject);
 803        if (ret)
 804                goto err_free;
 805
 806        memset(&resp, 0, sizeof resp);
 807        resp.cq_handle = obj->uobject.id;
 808        resp.cqe       = cq->cqe;
 809
 810        if (copy_to_user((void __user *) (unsigned long) cmd.response,
 811                         &resp, sizeof resp)) {
 812                ret = -EFAULT;
 813                goto err_copy;
 814        }
 815
 816        mutex_lock(&file->mutex);
 817        list_add_tail(&obj->uobject.list, &file->ucontext->cq_list);
 818        mutex_unlock(&file->mutex);
 819
 820        obj->uobject.live = 1;
 821
 822        up_write(&obj->uobject.mutex);
 823
 824        return in_len;
 825
 826err_copy:
 827        idr_remove_uobj(&ib_uverbs_cq_idr, &obj->uobject);
 828
 829err_free:
 830        ib_destroy_cq(cq);
 831
 832err_file:
 833        if (ev_file)
 834                ib_uverbs_release_ucq(file, ev_file, obj);
 835
 836err:
 837        put_uobj_write(&obj->uobject);
 838        return ret;
 839}
 840
 841ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
 842                            const char __user *buf, int in_len,
 843                            int out_len)
 844{
 845        struct ib_uverbs_resize_cq      cmd;
 846        struct ib_uverbs_resize_cq_resp resp;
 847        struct ib_udata                 udata;
 848        struct ib_cq                    *cq;
 849        int                             ret = -EINVAL;
 850
 851        if (copy_from_user(&cmd, buf, sizeof cmd))
 852                return -EFAULT;
 853
 854        INIT_UDATA(&udata, buf + sizeof cmd,
 855                   (unsigned long) cmd.response + sizeof resp,
 856                   in_len - sizeof cmd, out_len - sizeof resp);
 857
 858        cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
 859        if (!cq)
 860                return -EINVAL;
 861
 862        ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
 863        if (ret)
 864                goto out;
 865
 866        resp.cqe = cq->cqe;
 867
 868        if (copy_to_user((void __user *) (unsigned long) cmd.response,
 869                         &resp, sizeof resp.cqe))
 870                ret = -EFAULT;
 871
 872out:
 873        put_cq_read(cq);
 874
 875        return ret ? ret : in_len;
 876}
 877
 878ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
 879                          const char __user *buf, int in_len,
 880                          int out_len)
 881{
 882        struct ib_uverbs_poll_cq       cmd;
 883        struct ib_uverbs_poll_cq_resp *resp;
 884        struct ib_cq                  *cq;
 885        struct ib_wc                  *wc;
 886        int                            ret = 0;
 887        int                            i;
 888        int                            rsize;
 889
 890        if (copy_from_user(&cmd, buf, sizeof cmd))
 891                return -EFAULT;
 892
 893        wc = kmalloc(cmd.ne * sizeof *wc, GFP_KERNEL);
 894        if (!wc)
 895                return -ENOMEM;
 896
 897        rsize = sizeof *resp + cmd.ne * sizeof(struct ib_uverbs_wc);
 898        resp = kmalloc(rsize, GFP_KERNEL);
 899        if (!resp) {
 900                ret = -ENOMEM;
 901                goto out_wc;
 902        }
 903
 904        cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
 905        if (!cq) {
 906                ret = -EINVAL;
 907                goto out;
 908        }
 909
 910        resp->count = ib_poll_cq(cq, cmd.ne, wc);
 911
 912        put_cq_read(cq);
 913
 914        for (i = 0; i < resp->count; i++) {
 915                resp->wc[i].wr_id          = wc[i].wr_id;
 916                resp->wc[i].status         = wc[i].status;
 917                resp->wc[i].opcode         = wc[i].opcode;
 918                resp->wc[i].vendor_err     = wc[i].vendor_err;
 919                resp->wc[i].byte_len       = wc[i].byte_len;
 920                resp->wc[i].ex.imm_data    = (__u32 __force) wc[i].ex.imm_data;
 921                resp->wc[i].qp_num         = wc[i].qp->qp_num;
 922                resp->wc[i].src_qp         = wc[i].src_qp;
 923                resp->wc[i].wc_flags       = wc[i].wc_flags;
 924                resp->wc[i].pkey_index     = wc[i].pkey_index;
 925                resp->wc[i].slid           = wc[i].slid;
 926                resp->wc[i].sl             = wc[i].sl;
 927                resp->wc[i].dlid_path_bits = wc[i].dlid_path_bits;
 928                resp->wc[i].port_num       = wc[i].port_num;
 929        }
 930
 931        if (copy_to_user((void __user *) (unsigned long) cmd.response, resp, rsize))
 932                ret = -EFAULT;
 933
 934out:
 935        kfree(resp);
 936
 937out_wc:
 938        kfree(wc);
 939        return ret ? ret : in_len;
 940}
 941
 942ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
 943                                const char __user *buf, int in_len,
 944                                int out_len)
 945{
 946        struct ib_uverbs_req_notify_cq cmd;
 947        struct ib_cq                  *cq;
 948
 949        if (copy_from_user(&cmd, buf, sizeof cmd))
 950                return -EFAULT;
 951
 952        cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
 953        if (!cq)
 954                return -EINVAL;
 955
 956        ib_req_notify_cq(cq, cmd.solicited_only ?
 957                         IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
 958
 959        put_cq_read(cq);
 960
 961        return in_len;
 962}
 963
 964ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
 965                             const char __user *buf, int in_len,
 966                             int out_len)
 967{
 968        struct ib_uverbs_destroy_cq      cmd;
 969        struct ib_uverbs_destroy_cq_resp resp;
 970        struct ib_uobject               *uobj;
 971        struct ib_cq                    *cq;
 972        struct ib_ucq_object            *obj;
 973        struct ib_uverbs_event_file     *ev_file;
 974        int                              ret = -EINVAL;
 975
 976        if (copy_from_user(&cmd, buf, sizeof cmd))
 977                return -EFAULT;
 978
 979        uobj = idr_write_uobj(&ib_uverbs_cq_idr, cmd.cq_handle, file->ucontext);
 980        if (!uobj)
 981                return -EINVAL;
 982        cq      = uobj->object;
 983        ev_file = cq->cq_context;
 984        obj     = container_of(cq->uobject, struct ib_ucq_object, uobject);
 985
 986        ret = ib_destroy_cq(cq);
 987        if (!ret)
 988                uobj->live = 0;
 989
 990        put_uobj_write(uobj);
 991
 992        if (ret)
 993                return ret;
 994
 995        idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
 996
 997        mutex_lock(&file->mutex);
 998        list_del(&uobj->list);
 999        mutex_unlock(&file->mutex);
1000
1001        ib_uverbs_release_ucq(file, ev_file, obj);
1002
1003        memset(&resp, 0, sizeof resp);
1004        resp.comp_events_reported  = obj->comp_events_reported;
1005        resp.async_events_reported = obj->async_events_reported;
1006
1007        put_uobj(uobj);
1008
1009        if (copy_to_user((void __user *) (unsigned long) cmd.response,
1010                         &resp, sizeof resp))
1011                return -EFAULT;
1012
1013        return in_len;
1014}
1015
1016ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1017                            const char __user *buf, int in_len,
1018                            int out_len)
1019{
1020        struct ib_uverbs_create_qp      cmd;
1021        struct ib_uverbs_create_qp_resp resp;
1022        struct ib_udata                 udata;
1023        struct ib_uqp_object           *obj;
1024        struct ib_pd                   *pd;
1025        struct ib_cq                   *scq, *rcq;
1026        struct ib_srq                  *srq;
1027        struct ib_qp                   *qp;
1028        struct ib_qp_init_attr          attr;
1029        int ret;
1030
1031        if (out_len < sizeof resp)
1032                return -ENOSPC;
1033
1034        if (copy_from_user(&cmd, buf, sizeof cmd))
1035                return -EFAULT;
1036
1037        INIT_UDATA(&udata, buf + sizeof cmd,
1038                   (unsigned long) cmd.response + sizeof resp,
1039                   in_len - sizeof cmd, out_len - sizeof resp);
1040
1041        obj = kmalloc(sizeof *obj, GFP_KERNEL);
1042        if (!obj)
1043                return -ENOMEM;
1044
1045        init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_key);
1046        down_write(&obj->uevent.uobject.mutex);
1047
1048        srq = cmd.is_srq ? idr_read_srq(cmd.srq_handle, file->ucontext) : NULL;
1049        pd  = idr_read_pd(cmd.pd_handle, file->ucontext);
1050        scq = idr_read_cq(cmd.send_cq_handle, file->ucontext, 0);
1051        rcq = cmd.recv_cq_handle == cmd.send_cq_handle ?
1052                scq : idr_read_cq(cmd.recv_cq_handle, file->ucontext, 1);
1053
1054        if (!pd || !scq || !rcq || (cmd.is_srq && !srq)) {
1055                ret = -EINVAL;
1056                goto err_put;
1057        }
1058
1059        attr.event_handler = ib_uverbs_qp_event_handler;
1060        attr.qp_context    = file;
1061        attr.send_cq       = scq;
1062        attr.recv_cq       = rcq;
1063        attr.srq           = srq;
1064        attr.sq_sig_type   = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
1065        attr.qp_type       = cmd.qp_type;
1066        attr.create_flags  = 0;
1067
1068        attr.cap.max_send_wr     = cmd.max_send_wr;
1069        attr.cap.max_recv_wr     = cmd.max_recv_wr;
1070        attr.cap.max_send_sge    = cmd.max_send_sge;
1071        attr.cap.max_recv_sge    = cmd.max_recv_sge;
1072        attr.cap.max_inline_data = cmd.max_inline_data;
1073
1074        obj->uevent.events_reported     = 0;
1075        INIT_LIST_HEAD(&obj->uevent.event_list);
1076        INIT_LIST_HEAD(&obj->mcast_list);
1077
1078        qp = pd->device->create_qp(pd, &attr, &udata);
1079        if (IS_ERR(qp)) {
1080                ret = PTR_ERR(qp);
1081                goto err_put;
1082        }
1083
1084        qp->device        = pd->device;
1085        qp->pd            = pd;
1086        qp->send_cq       = attr.send_cq;
1087        qp->recv_cq       = attr.recv_cq;
1088        qp->srq           = attr.srq;
1089        qp->uobject       = &obj->uevent.uobject;
1090        qp->event_handler = attr.event_handler;
1091        qp->qp_context    = attr.qp_context;
1092        qp->qp_type       = attr.qp_type;
1093        atomic_inc(&pd->usecnt);
1094        atomic_inc(&attr.send_cq->usecnt);
1095        atomic_inc(&attr.recv_cq->usecnt);
1096        if (attr.srq)
1097                atomic_inc(&attr.srq->usecnt);
1098
1099        obj->uevent.uobject.object = qp;
1100        ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1101        if (ret)
1102                goto err_destroy;
1103
1104        memset(&resp, 0, sizeof resp);
1105        resp.qpn             = qp->qp_num;
1106        resp.qp_handle       = obj->uevent.uobject.id;
1107        resp.max_recv_sge    = attr.cap.max_recv_sge;
1108        resp.max_send_sge    = attr.cap.max_send_sge;
1109        resp.max_recv_wr     = attr.cap.max_recv_wr;
1110        resp.max_send_wr     = attr.cap.max_send_wr;
1111        resp.max_inline_data = attr.cap.max_inline_data;
1112
1113        if (copy_to_user((void __user *) (unsigned long) cmd.response,
1114                         &resp, sizeof resp)) {
1115                ret = -EFAULT;
1116                goto err_copy;
1117        }
1118
1119        put_pd_read(pd);
1120        put_cq_read(scq);
1121        if (rcq != scq)
1122                put_cq_read(rcq);
1123        if (srq)
1124                put_srq_read(srq);
1125
1126        mutex_lock(&file->mutex);
1127        list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1128        mutex_unlock(&file->mutex);
1129
1130        obj->uevent.uobject.live = 1;
1131
1132        up_write(&obj->uevent.uobject.mutex);
1133
1134        return in_len;
1135
1136err_copy:
1137        idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1138
1139err_destroy:
1140        ib_destroy_qp(qp);
1141
1142err_put:
1143        if (pd)
1144                put_pd_read(pd);
1145        if (scq)
1146                put_cq_read(scq);
1147        if (rcq && rcq != scq)
1148                put_cq_read(rcq);
1149        if (srq)
1150                put_srq_read(srq);
1151
1152        put_uobj_write(&obj->uevent.uobject);
1153        return ret;
1154}
1155
1156ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
1157                           const char __user *buf, int in_len,
1158                           int out_len)
1159{
1160        struct ib_uverbs_query_qp      cmd;
1161        struct ib_uverbs_query_qp_resp resp;
1162        struct ib_qp                   *qp;
1163        struct ib_qp_attr              *attr;
1164        struct ib_qp_init_attr         *init_attr;
1165        int                            ret;
1166
1167        if (copy_from_user(&cmd, buf, sizeof cmd))
1168                return -EFAULT;
1169
1170        attr      = kmalloc(sizeof *attr, GFP_KERNEL);
1171        init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1172        if (!attr || !init_attr) {
1173                ret = -ENOMEM;
1174                goto out;
1175        }
1176
1177        qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1178        if (!qp) {
1179                ret = -EINVAL;
1180                goto out;
1181        }
1182
1183        ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1184
1185        put_qp_read(qp);
1186
1187        if (ret)
1188                goto out;
1189
1190        memset(&resp, 0, sizeof resp);
1191
1192        resp.qp_state               = attr->qp_state;
1193        resp.cur_qp_state           = attr->cur_qp_state;
1194        resp.path_mtu               = attr->path_mtu;
1195        resp.path_mig_state         = attr->path_mig_state;
1196        resp.qkey                   = attr->qkey;
1197        resp.rq_psn                 = attr->rq_psn;
1198        resp.sq_psn                 = attr->sq_psn;
1199        resp.dest_qp_num            = attr->dest_qp_num;
1200        resp.qp_access_flags        = attr->qp_access_flags;
1201        resp.pkey_index             = attr->pkey_index;
1202        resp.alt_pkey_index         = attr->alt_pkey_index;
1203        resp.sq_draining            = attr->sq_draining;
1204        resp.max_rd_atomic          = attr->max_rd_atomic;
1205        resp.max_dest_rd_atomic     = attr->max_dest_rd_atomic;
1206        resp.min_rnr_timer          = attr->min_rnr_timer;
1207        resp.port_num               = attr->port_num;
1208        resp.timeout                = attr->timeout;
1209        resp.retry_cnt              = attr->retry_cnt;
1210        resp.rnr_retry              = attr->rnr_retry;
1211        resp.alt_port_num           = attr->alt_port_num;
1212        resp.alt_timeout            = attr->alt_timeout;
1213
1214        memcpy(resp.dest.dgid, attr->ah_attr.grh.dgid.raw, 16);
1215        resp.dest.flow_label        = attr->ah_attr.grh.flow_label;
1216        resp.dest.sgid_index        = attr->ah_attr.grh.sgid_index;
1217        resp.dest.hop_limit         = attr->ah_attr.grh.hop_limit;
1218        resp.dest.traffic_class     = attr->ah_attr.grh.traffic_class;
1219        resp.dest.dlid              = attr->ah_attr.dlid;
1220        resp.dest.sl                = attr->ah_attr.sl;
1221        resp.dest.src_path_bits     = attr->ah_attr.src_path_bits;
1222        resp.dest.static_rate       = attr->ah_attr.static_rate;
1223        resp.dest.is_global         = !!(attr->ah_attr.ah_flags & IB_AH_GRH);
1224        resp.dest.port_num          = attr->ah_attr.port_num;
1225
1226        memcpy(resp.alt_dest.dgid, attr->alt_ah_attr.grh.dgid.raw, 16);
1227        resp.alt_dest.flow_label    = attr->alt_ah_attr.grh.flow_label;
1228        resp.alt_dest.sgid_index    = attr->alt_ah_attr.grh.sgid_index;
1229        resp.alt_dest.hop_limit     = attr->alt_ah_attr.grh.hop_limit;
1230        resp.alt_dest.traffic_class = attr->alt_ah_attr.grh.traffic_class;
1231        resp.alt_dest.dlid          = attr->alt_ah_attr.dlid;
1232        resp.alt_dest.sl            = attr->alt_ah_attr.sl;
1233        resp.alt_dest.src_path_bits = attr->alt_ah_attr.src_path_bits;
1234        resp.alt_dest.static_rate   = attr->alt_ah_attr.static_rate;
1235        resp.alt_dest.is_global     = !!(attr->alt_ah_attr.ah_flags & IB_AH_GRH);
1236        resp.alt_dest.port_num      = attr->alt_ah_attr.port_num;
1237
1238        resp.max_send_wr            = init_attr->cap.max_send_wr;
1239        resp.max_recv_wr            = init_attr->cap.max_recv_wr;
1240        resp.max_send_sge           = init_attr->cap.max_send_sge;
1241        resp.max_recv_sge           = init_attr->cap.max_recv_sge;
1242        resp.max_inline_data        = init_attr->cap.max_inline_data;
1243        resp.sq_sig_all             = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1244
1245        if (copy_to_user((void __user *) (unsigned long) cmd.response,
1246                         &resp, sizeof resp))
1247                ret = -EFAULT;
1248
1249out:
1250        kfree(attr);
1251        kfree(init_attr);
1252
1253        return ret ? ret : in_len;
1254}
1255
1256ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
1257                            const char __user *buf, int in_len,
1258                            int out_len)
1259{
1260        struct ib_uverbs_modify_qp cmd;
1261        struct ib_udata            udata;
1262        struct ib_qp              *qp;
1263        struct ib_qp_attr         *attr;
1264        int                        ret;
1265
1266        if (copy_from_user(&cmd, buf, sizeof cmd))
1267                return -EFAULT;
1268
1269        INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
1270                   out_len);
1271
1272        attr = kmalloc(sizeof *attr, GFP_KERNEL);
1273        if (!attr)
1274                return -ENOMEM;
1275
1276        qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1277        if (!qp) {
1278                ret = -EINVAL;
1279                goto out;
1280        }
1281
1282        attr->qp_state            = cmd.qp_state;
1283        attr->cur_qp_state        = cmd.cur_qp_state;
1284        attr->path_mtu            = cmd.path_mtu;
1285        attr->path_mig_state      = cmd.path_mig_state;
1286        attr->qkey                = cmd.qkey;
1287        attr->rq_psn              = cmd.rq_psn;
1288        attr->sq_psn              = cmd.sq_psn;
1289        attr->dest_qp_num         = cmd.dest_qp_num;
1290        attr->qp_access_flags     = cmd.qp_access_flags;
1291        attr->pkey_index          = cmd.pkey_index;
1292        attr->alt_pkey_index      = cmd.alt_pkey_index;
1293        attr->en_sqd_async_notify = cmd.en_sqd_async_notify;
1294        attr->max_rd_atomic       = cmd.max_rd_atomic;
1295        attr->max_dest_rd_atomic  = cmd.max_dest_rd_atomic;
1296        attr->min_rnr_timer       = cmd.min_rnr_timer;
1297        attr->port_num            = cmd.port_num;
1298        attr->timeout             = cmd.timeout;
1299        attr->retry_cnt           = cmd.retry_cnt;
1300        attr->rnr_retry           = cmd.rnr_retry;
1301        attr->alt_port_num        = cmd.alt_port_num;
1302        attr->alt_timeout         = cmd.alt_timeout;
1303
1304        memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16);
1305        attr->ah_attr.grh.flow_label        = cmd.dest.flow_label;
1306        attr->ah_attr.grh.sgid_index        = cmd.dest.sgid_index;
1307        attr->ah_attr.grh.hop_limit         = cmd.dest.hop_limit;
1308        attr->ah_attr.grh.traffic_class     = cmd.dest.traffic_class;
1309        attr->ah_attr.dlid                  = cmd.dest.dlid;
1310        attr->ah_attr.sl                    = cmd.dest.sl;
1311        attr->ah_attr.src_path_bits         = cmd.dest.src_path_bits;
1312        attr->ah_attr.static_rate           = cmd.dest.static_rate;
1313        attr->ah_attr.ah_flags              = cmd.dest.is_global ? IB_AH_GRH : 0;
1314        attr->ah_attr.port_num              = cmd.dest.port_num;
1315
1316        memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16);
1317        attr->alt_ah_attr.grh.flow_label    = cmd.alt_dest.flow_label;
1318        attr->alt_ah_attr.grh.sgid_index    = cmd.alt_dest.sgid_index;
1319        attr->alt_ah_attr.grh.hop_limit     = cmd.alt_dest.hop_limit;
1320        attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class;
1321        attr->alt_ah_attr.dlid              = cmd.alt_dest.dlid;
1322        attr->alt_ah_attr.sl                = cmd.alt_dest.sl;
1323        attr->alt_ah_attr.src_path_bits     = cmd.alt_dest.src_path_bits;
1324        attr->alt_ah_attr.static_rate       = cmd.alt_dest.static_rate;
1325        attr->alt_ah_attr.ah_flags          = cmd.alt_dest.is_global ? IB_AH_GRH : 0;
1326        attr->alt_ah_attr.port_num          = cmd.alt_dest.port_num;
1327
1328        ret = qp->device->modify_qp(qp, attr, cmd.attr_mask, &udata);
1329
1330        put_qp_read(qp);
1331
1332        if (ret)
1333                goto out;
1334
1335        ret = in_len;
1336
1337out:
1338        kfree(attr);
1339
1340        return ret;
1341}
1342
1343ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
1344                             const char __user *buf, int in_len,
1345                             int out_len)
1346{
1347        struct ib_uverbs_destroy_qp      cmd;
1348        struct ib_uverbs_destroy_qp_resp resp;
1349        struct ib_uobject               *uobj;
1350        struct ib_qp                    *qp;
1351        struct ib_uqp_object            *obj;
1352        int                              ret = -EINVAL;
1353
1354        if (copy_from_user(&cmd, buf, sizeof cmd))
1355                return -EFAULT;
1356
1357        memset(&resp, 0, sizeof resp);
1358
1359        uobj = idr_write_uobj(&ib_uverbs_qp_idr, cmd.qp_handle, file->ucontext);
1360        if (!uobj)
1361                return -EINVAL;
1362        qp  = uobj->object;
1363        obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
1364
1365        if (!list_empty(&obj->mcast_list)) {
1366                put_uobj_write(uobj);
1367                return -EBUSY;
1368        }
1369
1370        ret = ib_destroy_qp(qp);
1371        if (!ret)
1372                uobj->live = 0;
1373
1374        put_uobj_write(uobj);
1375
1376        if (ret)
1377                return ret;
1378
1379        idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
1380
1381        mutex_lock(&file->mutex);
1382        list_del(&uobj->list);
1383        mutex_unlock(&file->mutex);
1384
1385        ib_uverbs_release_uevent(file, &obj->uevent);
1386
1387        resp.events_reported = obj->uevent.events_reported;
1388
1389        put_uobj(uobj);
1390
1391        if (copy_to_user((void __user *) (unsigned long) cmd.response,
1392                         &resp, sizeof resp))
1393                return -EFAULT;
1394
1395        return in_len;
1396}
1397
1398ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
1399                            const char __user *buf, int in_len,
1400                            int out_len)
1401{
1402        struct ib_uverbs_post_send      cmd;
1403        struct ib_uverbs_post_send_resp resp;
1404        struct ib_uverbs_send_wr       *user_wr;
1405        struct ib_send_wr              *wr = NULL, *last, *next, *bad_wr;
1406        struct ib_qp                   *qp;
1407        int                             i, sg_ind;
1408        int                             is_ud;
1409        ssize_t                         ret = -EINVAL;
1410
1411        if (copy_from_user(&cmd, buf, sizeof cmd))
1412                return -EFAULT;
1413
1414        if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
1415            cmd.sge_count * sizeof (struct ib_uverbs_sge))
1416                return -EINVAL;
1417
1418        if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
1419                return -EINVAL;
1420
1421        user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
1422        if (!user_wr)
1423                return -ENOMEM;
1424
1425        qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1426        if (!qp)
1427                goto out;
1428
1429        is_ud = qp->qp_type == IB_QPT_UD;
1430        sg_ind = 0;
1431        last = NULL;
1432        for (i = 0; i < cmd.wr_count; ++i) {
1433                if (copy_from_user(user_wr,
1434                                   buf + sizeof cmd + i * cmd.wqe_size,
1435                                   cmd.wqe_size)) {
1436                        ret = -EFAULT;
1437                        goto out_put;
1438                }
1439
1440                if (user_wr->num_sge + sg_ind > cmd.sge_count) {
1441                        ret = -EINVAL;
1442                        goto out_put;
1443                }
1444
1445                next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1446                               user_wr->num_sge * sizeof (struct ib_sge),
1447                               GFP_KERNEL);
1448                if (!next) {
1449                        ret = -ENOMEM;
1450                        goto out_put;
1451                }
1452
1453                if (!last)
1454                        wr = next;
1455                else
1456                        last->next = next;
1457                last = next;
1458
1459                next->next       = NULL;
1460                next->wr_id      = user_wr->wr_id;
1461                next->num_sge    = user_wr->num_sge;
1462                next->opcode     = user_wr->opcode;
1463                next->send_flags = user_wr->send_flags;
1464
1465                if (is_ud) {
1466                        next->wr.ud.ah = idr_read_ah(user_wr->wr.ud.ah,
1467                                                     file->ucontext);
1468                        if (!next->wr.ud.ah) {
1469                                ret = -EINVAL;
1470                                goto out_put;
1471                        }
1472                        next->wr.ud.remote_qpn  = user_wr->wr.ud.remote_qpn;
1473                        next->wr.ud.remote_qkey = user_wr->wr.ud.remote_qkey;
1474                } else {
1475                        switch (next->opcode) {
1476                        case IB_WR_RDMA_WRITE_WITH_IMM:
1477                                next->ex.imm_data =
1478                                        (__be32 __force) user_wr->ex.imm_data;
1479                        case IB_WR_RDMA_WRITE:
1480                        case IB_WR_RDMA_READ:
1481                                next->wr.rdma.remote_addr =
1482                                        user_wr->wr.rdma.remote_addr;
1483                                next->wr.rdma.rkey        =
1484                                        user_wr->wr.rdma.rkey;
1485                                break;
1486                        case IB_WR_SEND_WITH_IMM:
1487                                next->ex.imm_data =
1488                                        (__be32 __force) user_wr->ex.imm_data;
1489                                break;
1490                        case IB_WR_SEND_WITH_INV:
1491                                next->ex.invalidate_rkey =
1492                                        user_wr->ex.invalidate_rkey;
1493                                break;
1494                        case IB_WR_ATOMIC_CMP_AND_SWP:
1495                        case IB_WR_ATOMIC_FETCH_AND_ADD:
1496                                next->wr.atomic.remote_addr =
1497                                        user_wr->wr.atomic.remote_addr;
1498                                next->wr.atomic.compare_add =
1499                                        user_wr->wr.atomic.compare_add;
1500                                next->wr.atomic.swap = user_wr->wr.atomic.swap;
1501                                next->wr.atomic.rkey = user_wr->wr.atomic.rkey;
1502                                break;
1503                        default:
1504                                break;
1505                        }
1506                }
1507
1508                if (next->num_sge) {
1509                        next->sg_list = (void *) next +
1510                                ALIGN(sizeof *next, sizeof (struct ib_sge));
1511                        if (copy_from_user(next->sg_list,
1512                                           buf + sizeof cmd +
1513                                           cmd.wr_count * cmd.wqe_size +
1514                                           sg_ind * sizeof (struct ib_sge),
1515                                           next->num_sge * sizeof (struct ib_sge))) {
1516                                ret = -EFAULT;
1517                                goto out_put;
1518                        }
1519                        sg_ind += next->num_sge;
1520                } else
1521                        next->sg_list = NULL;
1522        }
1523
1524        resp.bad_wr = 0;
1525        ret = qp->device->post_send(qp, wr, &bad_wr);
1526        if (ret)
1527                for (next = wr; next; next = next->next) {
1528                        ++resp.bad_wr;
1529                        if (next == bad_wr)
1530                                break;
1531                }
1532
1533        if (copy_to_user((void __user *) (unsigned long) cmd.response,
1534                         &resp, sizeof resp))
1535                ret = -EFAULT;
1536
1537out_put:
1538        put_qp_read(qp);
1539
1540        while (wr) {
1541                if (is_ud && wr->wr.ud.ah)
1542                        put_ah_read(wr->wr.ud.ah);
1543                next = wr->next;
1544                kfree(wr);
1545                wr = next;
1546        }
1547
1548out:
1549        kfree(user_wr);
1550
1551        return ret ? ret : in_len;
1552}
1553
1554static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
1555                                                    int in_len,
1556                                                    u32 wr_count,
1557                                                    u32 sge_count,
1558                                                    u32 wqe_size)
1559{
1560        struct ib_uverbs_recv_wr *user_wr;
1561        struct ib_recv_wr        *wr = NULL, *last, *next;
1562        int                       sg_ind;
1563        int                       i;
1564        int                       ret;
1565
1566        if (in_len < wqe_size * wr_count +
1567            sge_count * sizeof (struct ib_uverbs_sge))
1568                return ERR_PTR(-EINVAL);
1569
1570        if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
1571                return ERR_PTR(-EINVAL);
1572
1573        user_wr = kmalloc(wqe_size, GFP_KERNEL);
1574        if (!user_wr)
1575                return ERR_PTR(-ENOMEM);
1576
1577        sg_ind = 0;
1578        last = NULL;
1579        for (i = 0; i < wr_count; ++i) {
1580                if (copy_from_user(user_wr, buf + i * wqe_size,
1581                                   wqe_size)) {
1582                        ret = -EFAULT;
1583                        goto err;
1584                }
1585
1586                if (user_wr->num_sge + sg_ind > sge_count) {
1587                        ret = -EINVAL;
1588                        goto err;
1589                }
1590
1591                next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1592                               user_wr->num_sge * sizeof (struct ib_sge),
1593                               GFP_KERNEL);
1594                if (!next) {
1595                        ret = -ENOMEM;
1596                        goto err;
1597                }
1598
1599                if (!last)
1600                        wr = next;
1601                else
1602                        last->next = next;
1603                last = next;
1604
1605                next->next       = NULL;
1606                next->wr_id      = user_wr->wr_id;
1607                next->num_sge    = user_wr->num_sge;
1608
1609                if (next->num_sge) {
1610                        next->sg_list = (void *) next +
1611                                ALIGN(sizeof *next, sizeof (struct ib_sge));
1612                        if (copy_from_user(next->sg_list,
1613                                           buf + wr_count * wqe_size +
1614                                           sg_ind * sizeof (struct ib_sge),
1615                                           next->num_sge * sizeof (struct ib_sge))) {
1616                                ret = -EFAULT;
1617                                goto err;
1618                        }
1619                        sg_ind += next->num_sge;
1620                } else
1621                        next->sg_list = NULL;
1622        }
1623
1624        kfree(user_wr);
1625        return wr;
1626
1627err:
1628        kfree(user_wr);
1629
1630        while (wr) {
1631                next = wr->next;
1632                kfree(wr);
1633                wr = next;
1634        }
1635
1636        return ERR_PTR(ret);
1637}
1638
1639ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
1640                            const char __user *buf, int in_len,
1641                            int out_len)
1642{
1643        struct ib_uverbs_post_recv      cmd;
1644        struct ib_uverbs_post_recv_resp resp;
1645        struct ib_recv_wr              *wr, *next, *bad_wr;
1646        struct ib_qp                   *qp;
1647        ssize_t                         ret = -EINVAL;
1648
1649        if (copy_from_user(&cmd, buf, sizeof cmd))
1650                return -EFAULT;
1651
1652        wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1653                                       in_len - sizeof cmd, cmd.wr_count,
1654                                       cmd.sge_count, cmd.wqe_size);
1655        if (IS_ERR(wr))
1656                return PTR_ERR(wr);
1657
1658        qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1659        if (!qp)
1660                goto out;
1661
1662        resp.bad_wr = 0;
1663        ret = qp->device->post_recv(qp, wr, &bad_wr);
1664
1665        put_qp_read(qp);
1666
1667        if (ret)
1668                for (next = wr; next; next = next->next) {
1669                        ++resp.bad_wr;
1670                        if (next == bad_wr)
1671                                break;
1672                }
1673
1674        if (copy_to_user((void __user *) (unsigned long) cmd.response,
1675                         &resp, sizeof resp))
1676                ret = -EFAULT;
1677
1678out:
1679        while (wr) {
1680                next = wr->next;
1681                kfree(wr);
1682                wr = next;
1683        }
1684
1685        return ret ? ret : in_len;
1686}
1687
1688ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
1689                                const char __user *buf, int in_len,
1690                                int out_len)
1691{
1692        struct ib_uverbs_post_srq_recv      cmd;
1693        struct ib_uverbs_post_srq_recv_resp resp;
1694        struct ib_recv_wr                  *wr, *next, *bad_wr;
1695        struct ib_srq                      *srq;
1696        ssize_t                             ret = -EINVAL;
1697
1698        if (copy_from_user(&cmd, buf, sizeof cmd))
1699                return -EFAULT;
1700
1701        wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1702                                       in_len - sizeof cmd, cmd.wr_count,
1703                                       cmd.sge_count, cmd.wqe_size);
1704        if (IS_ERR(wr))
1705                return PTR_ERR(wr);
1706
1707        srq = idr_read_srq(cmd.srq_handle, file->ucontext);
1708        if (!srq)
1709                goto out;
1710
1711        resp.bad_wr = 0;
1712        ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
1713
1714        put_srq_read(srq);
1715
1716        if (ret)
1717                for (next = wr; next; next = next->next) {
1718                        ++resp.bad_wr;
1719                        if (next == bad_wr)
1720                                break;
1721                }
1722
1723        if (copy_to_user((void __user *) (unsigned long) cmd.response,
1724                         &resp, sizeof resp))
1725                ret = -EFAULT;
1726
1727out:
1728        while (wr) {
1729                next = wr->next;
1730                kfree(wr);
1731                wr = next;
1732        }
1733
1734        return ret ? ret : in_len;
1735}
1736
1737ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
1738                            const char __user *buf, int in_len,
1739                            int out_len)
1740{
1741        struct ib_uverbs_create_ah       cmd;
1742        struct ib_uverbs_create_ah_resp  resp;
1743        struct ib_uobject               *uobj;
1744        struct ib_pd                    *pd;
1745        struct ib_ah                    *ah;
1746        struct ib_ah_attr               attr;
1747        int ret;
1748
1749        if (out_len < sizeof resp)
1750                return -ENOSPC;
1751
1752        if (copy_from_user(&cmd, buf, sizeof cmd))
1753                return -EFAULT;
1754
1755        uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
1756        if (!uobj)
1757                return -ENOMEM;
1758
1759        init_uobj(uobj, cmd.user_handle, file->ucontext, &ah_lock_key);
1760        down_write(&uobj->mutex);
1761
1762        pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1763        if (!pd) {
1764                ret = -EINVAL;
1765                goto err;
1766        }
1767
1768        attr.dlid              = cmd.attr.dlid;
1769        attr.sl                = cmd.attr.sl;
1770        attr.src_path_bits     = cmd.attr.src_path_bits;
1771        attr.static_rate       = cmd.attr.static_rate;
1772        attr.ah_flags          = cmd.attr.is_global ? IB_AH_GRH : 0;
1773        attr.port_num          = cmd.attr.port_num;
1774        attr.grh.flow_label    = cmd.attr.grh.flow_label;
1775        attr.grh.sgid_index    = cmd.attr.grh.sgid_index;
1776        attr.grh.hop_limit     = cmd.attr.grh.hop_limit;
1777        attr.grh.traffic_class = cmd.attr.grh.traffic_class;
1778        memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16);
1779
1780        ah = ib_create_ah(pd, &attr);
1781        if (IS_ERR(ah)) {
1782                ret = PTR_ERR(ah);
1783                goto err_put;
1784        }
1785
1786        ah->uobject  = uobj;
1787        uobj->object = ah;
1788
1789        ret = idr_add_uobj(&ib_uverbs_ah_idr, uobj);
1790        if (ret)
1791                goto err_destroy;
1792
1793        resp.ah_handle = uobj->id;
1794
1795        if (copy_to_user((void __user *) (unsigned long) cmd.response,
1796                         &resp, sizeof resp)) {
1797                ret = -EFAULT;
1798                goto err_copy;
1799        }
1800
1801        put_pd_read(pd);
1802
1803        mutex_lock(&file->mutex);
1804        list_add_tail(&uobj->list, &file->ucontext->ah_list);
1805        mutex_unlock(&file->mutex);
1806
1807        uobj->live = 1;
1808
1809        up_write(&uobj->mutex);
1810
1811        return in_len;
1812
1813err_copy:
1814        idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
1815
1816err_destroy:
1817        ib_destroy_ah(ah);
1818
1819err_put:
1820        put_pd_read(pd);
1821
1822err:
1823        put_uobj_write(uobj);
1824        return ret;
1825}
1826
1827ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
1828                             const char __user *buf, int in_len, int out_len)
1829{
1830        struct ib_uverbs_destroy_ah cmd;
1831        struct ib_ah               *ah;
1832        struct ib_uobject          *uobj;
1833        int                         ret;
1834
1835        if (copy_from_user(&cmd, buf, sizeof cmd))
1836                return -EFAULT;
1837
1838        uobj = idr_write_uobj(&ib_uverbs_ah_idr, cmd.ah_handle, file->ucontext);
1839        if (!uobj)
1840                return -EINVAL;
1841        ah = uobj->object;
1842
1843        ret = ib_destroy_ah(ah);
1844        if (!ret)
1845                uobj->live = 0;
1846
1847        put_uobj_write(uobj);
1848
1849        if (ret)
1850                return ret;
1851
1852        idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
1853
1854        mutex_lock(&file->mutex);
1855        list_del(&uobj->list);
1856        mutex_unlock(&file->mutex);
1857
1858        put_uobj(uobj);
1859
1860        return in_len;
1861}
1862
1863ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
1864                               const char __user *buf, int in_len,
1865                               int out_len)
1866{
1867        struct ib_uverbs_attach_mcast cmd;
1868        struct ib_qp                 *qp;
1869        struct ib_uqp_object         *obj;
1870        struct ib_uverbs_mcast_entry *mcast;
1871        int                           ret;
1872
1873        if (copy_from_user(&cmd, buf, sizeof cmd))
1874                return -EFAULT;
1875
1876        qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1877        if (!qp)
1878                return -EINVAL;
1879
1880        obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
1881
1882        list_for_each_entry(mcast, &obj->mcast_list, list)
1883                if (cmd.mlid == mcast->lid &&
1884                    !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
1885                        ret = 0;
1886                        goto out_put;
1887                }
1888
1889        mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
1890        if (!mcast) {
1891                ret = -ENOMEM;
1892                goto out_put;
1893        }
1894
1895        mcast->lid = cmd.mlid;
1896        memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
1897
1898        ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
1899        if (!ret)
1900                list_add_tail(&mcast->list, &obj->mcast_list);
1901        else
1902                kfree(mcast);
1903
1904out_put:
1905        put_qp_read(qp);
1906
1907        return ret ? ret : in_len;
1908}
1909
1910ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
1911                               const char __user *buf, int in_len,
1912                               int out_len)
1913{
1914        struct ib_uverbs_detach_mcast cmd;
1915        struct ib_uqp_object         *obj;
1916        struct ib_qp                 *qp;
1917        struct ib_uverbs_mcast_entry *mcast;
1918        int                           ret = -EINVAL;
1919
1920        if (copy_from_user(&cmd, buf, sizeof cmd))
1921                return -EFAULT;
1922
1923        qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1924        if (!qp)
1925                return -EINVAL;
1926
1927        ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
1928        if (ret)
1929                goto out_put;
1930
1931        obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
1932
1933        list_for_each_entry(mcast, &obj->mcast_list, list)
1934                if (cmd.mlid == mcast->lid &&
1935                    !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
1936                        list_del(&mcast->list);
1937                        kfree(mcast);
1938                        break;
1939                }
1940
1941out_put:
1942        put_qp_read(qp);
1943
1944        return ret ? ret : in_len;
1945}
1946
1947ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
1948                             const char __user *buf, int in_len,
1949                             int out_len)
1950{
1951        struct ib_uverbs_create_srq      cmd;
1952        struct ib_uverbs_create_srq_resp resp;
1953        struct ib_udata                  udata;
1954        struct ib_uevent_object         *obj;
1955        struct ib_pd                    *pd;
1956        struct ib_srq                   *srq;
1957        struct ib_srq_init_attr          attr;
1958        int ret;
1959
1960        if (out_len < sizeof resp)
1961                return -ENOSPC;
1962
1963        if (copy_from_user(&cmd, buf, sizeof cmd))
1964                return -EFAULT;
1965
1966        INIT_UDATA(&udata, buf + sizeof cmd,
1967                   (unsigned long) cmd.response + sizeof resp,
1968                   in_len - sizeof cmd, out_len - sizeof resp);
1969
1970        obj = kmalloc(sizeof *obj, GFP_KERNEL);
1971        if (!obj)
1972                return -ENOMEM;
1973
1974        init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &srq_lock_key);
1975        down_write(&obj->uobject.mutex);
1976
1977        pd  = idr_read_pd(cmd.pd_handle, file->ucontext);
1978        if (!pd) {
1979                ret = -EINVAL;
1980                goto err;
1981        }
1982
1983        attr.event_handler  = ib_uverbs_srq_event_handler;
1984        attr.srq_context    = file;
1985        attr.attr.max_wr    = cmd.max_wr;
1986        attr.attr.max_sge   = cmd.max_sge;
1987        attr.attr.srq_limit = cmd.srq_limit;
1988
1989        obj->events_reported     = 0;
1990        INIT_LIST_HEAD(&obj->event_list);
1991
1992        srq = pd->device->create_srq(pd, &attr, &udata);
1993        if (IS_ERR(srq)) {
1994                ret = PTR_ERR(srq);
1995                goto err_put;
1996        }
1997
1998        srq->device        = pd->device;
1999        srq->pd            = pd;
2000        srq->uobject       = &obj->uobject;
2001        srq->event_handler = attr.event_handler;
2002        srq->srq_context   = attr.srq_context;
2003        atomic_inc(&pd->usecnt);
2004        atomic_set(&srq->usecnt, 0);
2005
2006        obj->uobject.object = srq;
2007        ret = idr_add_uobj(&ib_uverbs_srq_idr, &obj->uobject);
2008        if (ret)
2009                goto err_destroy;
2010
2011        memset(&resp, 0, sizeof resp);
2012        resp.srq_handle = obj->uobject.id;
2013        resp.max_wr     = attr.attr.max_wr;
2014        resp.max_sge    = attr.attr.max_sge;
2015
2016        if (copy_to_user((void __user *) (unsigned long) cmd.response,
2017                         &resp, sizeof resp)) {
2018                ret = -EFAULT;
2019                goto err_copy;
2020        }
2021
2022        put_pd_read(pd);
2023
2024        mutex_lock(&file->mutex);
2025        list_add_tail(&obj->uobject.list, &file->ucontext->srq_list);
2026        mutex_unlock(&file->mutex);
2027
2028        obj->uobject.live = 1;
2029
2030        up_write(&obj->uobject.mutex);
2031
2032        return in_len;
2033
2034err_copy:
2035        idr_remove_uobj(&ib_uverbs_srq_idr, &obj->uobject);
2036
2037err_destroy:
2038        ib_destroy_srq(srq);
2039
2040err_put:
2041        put_pd_read(pd);
2042
2043err:
2044        put_uobj_write(&obj->uobject);
2045        return ret;
2046}
2047
2048ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
2049                             const char __user *buf, int in_len,
2050                             int out_len)
2051{
2052        struct ib_uverbs_modify_srq cmd;
2053        struct ib_udata             udata;
2054        struct ib_srq              *srq;
2055        struct ib_srq_attr          attr;
2056        int                         ret;
2057
2058        if (copy_from_user(&cmd, buf, sizeof cmd))
2059                return -EFAULT;
2060
2061        INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
2062                   out_len);
2063
2064        srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2065        if (!srq)
2066                return -EINVAL;
2067
2068        attr.max_wr    = cmd.max_wr;
2069        attr.srq_limit = cmd.srq_limit;
2070
2071        ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata);
2072
2073        put_srq_read(srq);
2074
2075        return ret ? ret : in_len;
2076}
2077
2078ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
2079                            const char __user *buf,
2080                            int in_len, int out_len)
2081{
2082        struct ib_uverbs_query_srq      cmd;
2083        struct ib_uverbs_query_srq_resp resp;
2084        struct ib_srq_attr              attr;
2085        struct ib_srq                   *srq;
2086        int                             ret;
2087
2088        if (out_len < sizeof resp)
2089                return -ENOSPC;
2090
2091        if (copy_from_user(&cmd, buf, sizeof cmd))
2092                return -EFAULT;
2093
2094        srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2095        if (!srq)
2096                return -EINVAL;
2097
2098        ret = ib_query_srq(srq, &attr);
2099
2100        put_srq_read(srq);
2101
2102        if (ret)
2103                return ret;
2104
2105        memset(&resp, 0, sizeof resp);
2106
2107        resp.max_wr    = attr.max_wr;
2108        resp.max_sge   = attr.max_sge;
2109        resp.srq_limit = attr.srq_limit;
2110
2111        if (copy_to_user((void __user *) (unsigned long) cmd.response,
2112                         &resp, sizeof resp))
2113                return -EFAULT;
2114
2115        return in_len;
2116}
2117
2118ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
2119                              const char __user *buf, int in_len,
2120                              int out_len)
2121{
2122        struct ib_uverbs_destroy_srq      cmd;
2123        struct ib_uverbs_destroy_srq_resp resp;
2124        struct ib_uobject                *uobj;
2125        struct ib_srq                    *srq;
2126        struct ib_uevent_object          *obj;
2127        int                               ret = -EINVAL;
2128
2129        if (copy_from_user(&cmd, buf, sizeof cmd))
2130                return -EFAULT;
2131
2132        uobj = idr_write_uobj(&ib_uverbs_srq_idr, cmd.srq_handle, file->ucontext);
2133        if (!uobj)
2134                return -EINVAL;
2135        srq = uobj->object;
2136        obj = container_of(uobj, struct ib_uevent_object, uobject);
2137
2138        ret = ib_destroy_srq(srq);
2139        if (!ret)
2140                uobj->live = 0;
2141
2142        put_uobj_write(uobj);
2143
2144        if (ret)
2145                return ret;
2146
2147        idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
2148
2149        mutex_lock(&file->mutex);
2150        list_del(&uobj->list);
2151        mutex_unlock(&file->mutex);
2152
2153        ib_uverbs_release_uevent(file, obj);
2154
2155        memset(&resp, 0, sizeof resp);
2156        resp.events_reported = obj->events_reported;
2157
2158        put_uobj(uobj);
2159
2160        if (copy_to_user((void __user *) (unsigned long) cmd.response,
2161                         &resp, sizeof resp))
2162                ret = -EFAULT;
2163
2164        return ret ? ret : in_len;
2165}
2166
lxr.linux.no kindly hosted by Redpill Linpro AS, provider of Linux consulting and operations services since 1995.