drivers/infiniband/core/uverbs_cmd.c

   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 #include <linux/slab.h>
  39 #include <linux/sched.h>
  40
  41 #include <asm/uaccess.h>
  42
  43 #include "uverbs.h"
  44 #include "core_priv.h"
  45
  46 struct uverbs_lock_class {
  47         struct lock_class_key   key;
  48         char                    name[16];
  49 };
  50
  51 static struct uverbs_lock_class pd_lock_class   = { .name = "PD-uobj" };
  52 static struct uverbs_lock_class mr_lock_class   = { .name = "MR-uobj" };
  53 static struct uverbs_lock_class mw_lock_class   = { .name = "MW-uobj" };
  54 static struct uverbs_lock_class cq_lock_class   = { .name = "CQ-uobj" };
  55 static struct uverbs_lock_class qp_lock_class   = { .name = "QP-uobj" };
  56 static struct uverbs_lock_class ah_lock_class   = { .name = "AH-uobj" };
  57 static struct uverbs_lock_class srq_lock_class  = { .name = "SRQ-uobj" };
  58 static struct uverbs_lock_class xrcd_lock_class = { .name = "XRCD-uobj" };
  59 static struct uverbs_lock_class rule_lock_class = { .name = "RULE-uobj" };
  60
  61 /*
  62  * The ib_uobject locking scheme is as follows:
  63  *
  64  * - ib_uverbs_idr_lock protects the uverbs idrs themselves, so it
  65  *   needs to be held during all idr operations.  When an object is
  66  *   looked up, a reference must be taken on the object's kref before
  67  *   dropping this lock.
  68  *
  69  * - Each object also has an rwsem.  This rwsem must be held for
  70  *   reading while an operation that uses the object is performed.
  71  *   For example, while registering an MR, the associated PD's
  72  *   uobject.mutex must be held for reading.  The rwsem must be held
  73  *   for writing while initializing or destroying an object.
  74  *
  75  * - In addition, each object has a "live" flag.  If this flag is not
  76  *   set, then lookups of the object will fail even if it is found in
  77  *   the idr.  This handles a reader that blocks and does not acquire
  78  *   the rwsem until after the object is destroyed.  The destroy
  79  *   operation will set the live flag to 0 and then drop the rwsem;
  80  *   this will allow the reader to acquire the rwsem, see that the
  81  *   live flag is 0, and then drop the rwsem and its reference to
  82  *   object.  The underlying storage will not be freed until the last
  83  *   reference to the object is dropped.
  84  */
  85
  86 static void init_uobj(struct ib_uobject *uobj, u64 user_handle,
  87                       struct ib_ucontext *context, struct uverbs_lock_class *c)
  88 {
  89         uobj->user_handle = user_handle;
  90         uobj->context     = context;
  91         kref_init(&uobj->ref);
  92         init_rwsem(&uobj->mutex);
  93         lockdep_set_class_and_name(&uobj->mutex, &c->key, c->name);
  94         uobj->live        = 0;
  95 }
  96
  97 static void release_uobj(struct kref *kref)
  98 {
  99         kfree(container_of(kref, struct ib_uobject, ref));
 100 }
 101
 102 static void put_uobj(struct ib_uobject *uobj)
 103 {
 104         kref_put(&uobj->ref, release_uobj);
 105 }
 106
 107 static void put_uobj_read(struct ib_uobject *uobj)
 108 {
 109         up_read(&uobj->mutex);
 110         put_uobj(uobj);
 111 }
 112
 113 static void put_uobj_write(struct ib_uobject *uobj)
 114 {
 115         up_write(&uobj->mutex);
 116         put_uobj(uobj);
 117 }
 118
 119 static int idr_add_uobj(struct idr *idr, struct ib_uobject *uobj)
 120 {
 121         int ret;
 122
 123         idr_preload(GFP_KERNEL);
 124         spin_lock(&ib_uverbs_idr_lock);
 125
 126         ret = idr_alloc(idr, uobj, 0, 0, GFP_NOWAIT);
 127         if (ret >= 0)
 128                 uobj->id = ret;
 129
 130         spin_unlock(&ib_uverbs_idr_lock);
 131         idr_preload_end();
 132
 133         return ret < 0 ? ret : 0;
 134 }
 135
 136 void idr_remove_uobj(struct idr *idr, struct ib_uobject *uobj)
 137 {
 138         spin_lock(&ib_uverbs_idr_lock);
 139         idr_remove(idr, uobj->id);
 140         spin_unlock(&ib_uverbs_idr_lock);
 141 }
 142
 143 static struct ib_uobject *__idr_get_uobj(struct idr *idr, int id,
 144                                          struct ib_ucontext *context)
 145 {
 146         struct ib_uobject *uobj;
 147
 148         spin_lock(&ib_uverbs_idr_lock);
 149         uobj = idr_find(idr, id);
 150         if (uobj) {
 151                 if (uobj->context == context)
 152                         kref_get(&uobj->ref);
 153                 else
 154                         uobj = NULL;
 155         }
 156         spin_unlock(&ib_uverbs_idr_lock);
 157
 158         return uobj;
 159 }
 160
 161 static struct ib_uobject *idr_read_uobj(struct idr *idr, int id,
 162                                         struct ib_ucontext *context, int nested)
 163 {
 164         struct ib_uobject *uobj;
 165
 166         uobj = __idr_get_uobj(idr, id, context);
 167         if (!uobj)
 168                 return NULL;
 169
 170         if (nested)
 171                 down_read_nested(&uobj->mutex, SINGLE_DEPTH_NESTING);
 172         else
 173                 down_read(&uobj->mutex);
 174         if (!uobj->live) {
 175                 put_uobj_read(uobj);
 176                 return NULL;
 177         }
 178
 179         return uobj;
 180 }
 181
 182 static struct ib_uobject *idr_write_uobj(struct idr *idr, int id,
 183                                          struct ib_ucontext *context)
 184 {
 185         struct ib_uobject *uobj;
 186
 187         uobj = __idr_get_uobj(idr, id, context);
 188         if (!uobj)
 189                 return NULL;
 190
 191         down_write(&uobj->mutex);
 192         if (!uobj->live) {
 193                 put_uobj_write(uobj);
 194                 return NULL;
 195         }
 196
 197         return uobj;
 198 }
 199
 200 static void *idr_read_obj(struct idr *idr, int id, struct ib_ucontext *context,
 201                           int nested)
 202 {
 203         struct ib_uobject *uobj;
 204
 205         uobj = idr_read_uobj(idr, id, context, nested);
 206         return uobj ? uobj->object : NULL;
 207 }
 208
 209 static struct ib_pd *idr_read_pd(int pd_handle, struct ib_ucontext *context)
 210 {
 211         return idr_read_obj(&ib_uverbs_pd_idr, pd_handle, context, 0);
 212 }
 213
 214 static void put_pd_read(struct ib_pd *pd)
 215 {
 216         put_uobj_read(pd->uobject);
 217 }
 218
 219 static struct ib_cq *idr_read_cq(int cq_handle, struct ib_ucontext *context, int nested)
 220 {
 221         return idr_read_obj(&ib_uverbs_cq_idr, cq_handle, context, nested);
 222 }
 223
 224 static void put_cq_read(struct ib_cq *cq)
 225 {
 226         put_uobj_read(cq->uobject);
 227 }
 228
 229 static struct ib_ah *idr_read_ah(int ah_handle, struct ib_ucontext *context)
 230 {
 231         return idr_read_obj(&ib_uverbs_ah_idr, ah_handle, context, 0);
 232 }
 233
 234 static void put_ah_read(struct ib_ah *ah)
 235 {
 236         put_uobj_read(ah->uobject);
 237 }
 238
 239 static struct ib_qp *idr_read_qp(int qp_handle, struct ib_ucontext *context)
 240 {
 241         return idr_read_obj(&ib_uverbs_qp_idr, qp_handle, context, 0);
 242 }
 243
 244 static struct ib_qp *idr_write_qp(int qp_handle, struct ib_ucontext *context)
 245 {
 246         struct ib_uobject *uobj;
 247
 248         uobj = idr_write_uobj(&ib_uverbs_qp_idr, qp_handle, context);
 249         return uobj ? uobj->object : NULL;
 250 }
 251
 252 static void put_qp_read(struct ib_qp *qp)
 253 {
 254         put_uobj_read(qp->uobject);
 255 }
 256
 257 static void put_qp_write(struct ib_qp *qp)
 258 {
 259         put_uobj_write(qp->uobject);
 260 }
 261
 262 static struct ib_srq *idr_read_srq(int srq_handle, struct ib_ucontext *context)
 263 {
 264         return idr_read_obj(&ib_uverbs_srq_idr, srq_handle, context, 0);
 265 }
 266
 267 static void put_srq_read(struct ib_srq *srq)
 268 {
 269         put_uobj_read(srq->uobject);
 270 }
 271
 272 static struct ib_xrcd *idr_read_xrcd(int xrcd_handle, struct ib_ucontext *context,
 273                                      struct ib_uobject **uobj)
 274 {
 275         *uobj = idr_read_uobj(&ib_uverbs_xrcd_idr, xrcd_handle, context, 0);
 276         return *uobj ? (*uobj)->object : NULL;
 277 }
 278
 279 static void put_xrcd_read(struct ib_uobject *uobj)
 280 {
 281         put_uobj_read(uobj);
 282 }
 283
 284 ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
 285                               const char __user *buf,
 286                               int in_len, int out_len)
 287 {
 288         struct ib_uverbs_get_context      cmd;
 289         struct ib_uverbs_get_context_resp resp;
 290         struct ib_udata                   udata;
 291         struct ib_device                 *ibdev = file->device->ib_dev;
 292 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
 293         struct ib_device_attr             dev_attr;
 294 #endif
 295         struct ib_ucontext               *ucontext;
 296         struct file                      *filp;
 297         int ret;
 298
 299         if (out_len < sizeof resp)
 300                 return -ENOSPC;
 301
 302         if (copy_from_user(&cmd, buf, sizeof cmd))
 303                 return -EFAULT;
 304
 305         mutex_lock(&file->mutex);
 306
 307         if (file->ucontext) {
 308                 ret = -EINVAL;
 309                 goto err;
 310         }
 311
 312         INIT_UDATA(&udata, buf + sizeof cmd,
 313                    (unsigned long) cmd.response + sizeof resp,
 314                    in_len - sizeof cmd, out_len - sizeof resp);
 315
 316         ucontext = ibdev->alloc_ucontext(ibdev, &udata);
 317         if (IS_ERR(ucontext)) {
 318                 ret = PTR_ERR(ucontext);
 319                 goto err;
 320         }
 321
 322         ucontext->device = ibdev;
 323         INIT_LIST_HEAD(&ucontext->pd_list);
 324         INIT_LIST_HEAD(&ucontext->mr_list);
 325         INIT_LIST_HEAD(&ucontext->mw_list);
 326         INIT_LIST_HEAD(&ucontext->cq_list);
 327         INIT_LIST_HEAD(&ucontext->qp_list);
 328         INIT_LIST_HEAD(&ucontext->srq_list);
 329         INIT_LIST_HEAD(&ucontext->ah_list);
 330         INIT_LIST_HEAD(&ucontext->xrcd_list);
 331         INIT_LIST_HEAD(&ucontext->rule_list);
 332         rcu_read_lock();
 333         ucontext->tgid = get_task_pid(current->group_leader, PIDTYPE_PID);
 334         rcu_read_unlock();
 335         ucontext->closing = 0;
 336
 337 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
 338         ucontext->umem_tree = RB_ROOT;
 339         init_rwsem(&ucontext->umem_rwsem);
 340         ucontext->odp_mrs_count = 0;
 341         INIT_LIST_HEAD(&ucontext->no_private_counters);
 342
 343         ret = ib_query_device(ibdev, &dev_attr);
 344         if (ret)
 345                 goto err_free;
 346         if (!(dev_attr.device_cap_flags & IB_DEVICE_ON_DEMAND_PAGING))
 347                 ucontext->invalidate_range = NULL;
 348
 349 #endif
 350
 351         resp.num_comp_vectors = file->device->num_comp_vectors;
 352
 353         ret = get_unused_fd_flags(O_CLOEXEC);
 354         if (ret < 0)
 355                 goto err_free;
 356         resp.async_fd = ret;
 357
 358         filp = ib_uverbs_alloc_event_file(file, 1);
 359         if (IS_ERR(filp)) {
 360                 ret = PTR_ERR(filp);
 361                 goto err_fd;
 362         }
 363
 364         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 365                          &resp, sizeof resp)) {
 366                 ret = -EFAULT;
 367                 goto err_file;
 368         }
 369
 370         file->async_file = filp->private_data;
 371
 372         INIT_IB_EVENT_HANDLER(&file->event_handler, file->device->ib_dev,
 373                               ib_uverbs_event_handler);
 374         ret = ib_register_event_handler(&file->event_handler);
 375         if (ret)
 376                 goto err_file;
 377
 378         kref_get(&file->async_file->ref);
 379         kref_get(&file->ref);
 380         file->ucontext = ucontext;
 381
 382         fd_install(resp.async_fd, filp);
 383
 384         mutex_unlock(&file->mutex);
 385
 386         return in_len;
 387
 388 err_file:
 389         fput(filp);
 390
 391 err_fd:
 392         put_unused_fd(resp.async_fd);
 393
 394 err_free:
 395         put_pid(ucontext->tgid);
 396         ibdev->dealloc_ucontext(ucontext);
 397
 398 err:
 399         mutex_unlock(&file->mutex);
 400         return ret;
 401 }
 402
 403 static void copy_query_dev_fields(struct ib_uverbs_file *file,
 404                                   struct ib_uverbs_query_device_resp *resp,
 405                                   struct ib_device_attr *attr)
 406 {
 407         resp->fw_ver            = attr->fw_ver;
 408         resp->node_guid         = file->device->ib_dev->node_guid;
 409         resp->sys_image_guid    = attr->sys_image_guid;
 410         resp->max_mr_size       = attr->max_mr_size;
 411         resp->page_size_cap     = attr->page_size_cap;
 412         resp->vendor_id         = attr->vendor_id;
 413         resp->vendor_part_id    = attr->vendor_part_id;
 414         resp->hw_ver            = attr->hw_ver;
 415         resp->max_qp            = attr->max_qp;
 416         resp->max_qp_wr         = attr->max_qp_wr;
 417         resp->device_cap_flags  = attr->device_cap_flags;
 418         resp->max_sge           = attr->max_sge;
 419         resp->max_sge_rd        = attr->max_sge_rd;
 420         resp->max_cq            = attr->max_cq;
 421         resp->max_cqe           = attr->max_cqe;
 422         resp->max_mr            = attr->max_mr;
 423         resp->max_pd            = attr->max_pd;
 424         resp->max_qp_rd_atom    = attr->max_qp_rd_atom;
 425         resp->max_ee_rd_atom    = attr->max_ee_rd_atom;
 426         resp->max_res_rd_atom   = attr->max_res_rd_atom;
 427         resp->max_qp_init_rd_atom       = attr->max_qp_init_rd_atom;
 428         resp->max_ee_init_rd_atom       = attr->max_ee_init_rd_atom;
 429         resp->atomic_cap                = attr->atomic_cap;
 430         resp->max_ee                    = attr->max_ee;
 431         resp->max_rdd                   = attr->max_rdd;
 432         resp->max_mw                    = attr->max_mw;
 433         resp->max_raw_ipv6_qp           = attr->max_raw_ipv6_qp;
 434         resp->max_raw_ethy_qp           = attr->max_raw_ethy_qp;
 435         resp->max_mcast_grp             = attr->max_mcast_grp;
 436         resp->max_mcast_qp_attach       = attr->max_mcast_qp_attach;
 437         resp->max_total_mcast_qp_attach = attr->max_total_mcast_qp_attach;
 438         resp->max_ah                    = attr->max_ah;
 439         resp->max_fmr                   = attr->max_fmr;
 440         resp->max_map_per_fmr           = attr->max_map_per_fmr;
 441         resp->max_srq                   = attr->max_srq;
 442         resp->max_srq_wr                = attr->max_srq_wr;
 443         resp->max_srq_sge               = attr->max_srq_sge;
 444         resp->max_pkeys                 = attr->max_pkeys;
 445         resp->local_ca_ack_delay        = attr->local_ca_ack_delay;
 446         resp->phys_port_cnt             = file->device->ib_dev->phys_port_cnt;
 447 }
 448
 449 ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
 450                                const char __user *buf,
 451                                int in_len, int out_len)
 452 {
 453         struct ib_uverbs_query_device      cmd;
 454         struct ib_uverbs_query_device_resp resp;
 455         struct ib_device_attr              attr;
 456         int                                ret;
 457
 458         if (out_len < sizeof resp)
 459                 return -ENOSPC;
 460
 461         if (copy_from_user(&cmd, buf, sizeof cmd))
 462                 return -EFAULT;
 463
 464         ret = ib_query_device(file->device->ib_dev, &attr);
 465         if (ret)
 466                 return ret;
 467
 468         memset(&resp, 0, sizeof resp);
 469         copy_query_dev_fields(file, &resp, &attr);
 470
 471         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 472                          &resp, sizeof resp))
 473                 return -EFAULT;
 474
 475         return in_len;
 476 }
 477
 478 ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
 479                              const char __user *buf,
 480                              int in_len, int out_len)
 481 {
 482         struct ib_uverbs_query_port      cmd;
 483         struct ib_uverbs_query_port_resp resp;
 484         struct ib_port_attr              attr;
 485         int                              ret;
 486
 487         if (out_len < sizeof resp)
 488                 return -ENOSPC;
 489
 490         if (copy_from_user(&cmd, buf, sizeof cmd))
 491                 return -EFAULT;
 492
 493         ret = ib_query_port(file->device->ib_dev, cmd.port_num, &attr);
 494         if (ret)
 495                 return ret;
 496
 497         memset(&resp, 0, sizeof resp);
 498
 499         resp.state           = attr.state;
 500         resp.max_mtu         = attr.max_mtu;
 501         resp.active_mtu      = attr.active_mtu;
 502         resp.gid_tbl_len     = attr.gid_tbl_len;
 503         resp.port_cap_flags  = attr.port_cap_flags;
 504         resp.max_msg_sz      = attr.max_msg_sz;
 505         resp.bad_pkey_cntr   = attr.bad_pkey_cntr;
 506         resp.qkey_viol_cntr  = attr.qkey_viol_cntr;
 507         resp.pkey_tbl_len    = attr.pkey_tbl_len;
 508         resp.lid             = attr.lid;
 509         resp.sm_lid          = attr.sm_lid;
 510         resp.lmc             = attr.lmc;
 511         resp.max_vl_num      = attr.max_vl_num;
 512         resp.sm_sl           = attr.sm_sl;
 513         resp.subnet_timeout  = attr.subnet_timeout;
 514         resp.init_type_reply = attr.init_type_reply;
 515         resp.active_width    = attr.active_width;
 516         resp.active_speed    = attr.active_speed;
 517         resp.phys_state      = attr.phys_state;
 518         resp.link_layer      = rdma_port_get_link_layer(file->device->ib_dev,
 519                                                         cmd.port_num);
 520
 521         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 522                          &resp, sizeof resp))
 523                 return -EFAULT;
 524
 525         return in_len;
 526 }
 527
 528 ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
 529                            const char __user *buf,
 530                            int in_len, int out_len)
 531 {
 532         struct ib_uverbs_alloc_pd      cmd;
 533         struct ib_uverbs_alloc_pd_resp resp;
 534         struct ib_udata                udata;
 535         struct ib_uobject             *uobj;
 536         struct ib_pd                  *pd;
 537         int                            ret;
 538
 539         if (out_len < sizeof resp)
 540                 return -ENOSPC;
 541
 542         if (copy_from_user(&cmd, buf, sizeof cmd))
 543                 return -EFAULT;
 544
 545         INIT_UDATA(&udata, buf + sizeof cmd,
 546                    (unsigned long) cmd.response + sizeof resp,
 547                    in_len - sizeof cmd, out_len - sizeof resp);
 548
 549         uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
 550         if (!uobj)
 551                 return -ENOMEM;
 552
 553         init_uobj(uobj, 0, file->ucontext, &pd_lock_class);
 554         down_write(&uobj->mutex);
 555
 556         pd = file->device->ib_dev->alloc_pd(file->device->ib_dev,
 557                                             file->ucontext, &udata);
 558         if (IS_ERR(pd)) {
 559                 ret = PTR_ERR(pd);
 560                 goto err;
 561         }
 562
 563         pd->device  = file->device->ib_dev;
 564         pd->uobject = uobj;
 565         atomic_set(&pd->usecnt, 0);
 566
 567         uobj->object = pd;
 568         ret = idr_add_uobj(&ib_uverbs_pd_idr, uobj);
 569         if (ret)
 570                 goto err_idr;
 571
 572         memset(&resp, 0, sizeof resp);
 573         resp.pd_handle = uobj->id;
 574
 575         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 576                          &resp, sizeof resp)) {
 577                 ret = -EFAULT;
 578                 goto err_copy;
 579         }
 580
 581         mutex_lock(&file->mutex);
 582         list_add_tail(&uobj->list, &file->ucontext->pd_list);
 583         mutex_unlock(&file->mutex);
 584
 585         uobj->live = 1;
 586
 587         up_write(&uobj->mutex);
 588
 589         return in_len;
 590
 591 err_copy:
 592         idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
 593
 594 err_idr:
 595         ib_dealloc_pd(pd);
 596
 597 err:
 598         put_uobj_write(uobj);
 599         return ret;
 600 }
 601
 602 ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
 603                              const char __user *buf,
 604                              int in_len, int out_len)
 605 {
 606         struct ib_uverbs_dealloc_pd cmd;
 607         struct ib_uobject          *uobj;
 608         int                         ret;
 609
 610         if (copy_from_user(&cmd, buf, sizeof cmd))
 611                 return -EFAULT;
 612
 613         uobj = idr_write_uobj(&ib_uverbs_pd_idr, cmd.pd_handle, file->ucontext);
 614         if (!uobj)
 615                 return -EINVAL;
 616
 617         ret = ib_dealloc_pd(uobj->object);
 618         if (!ret)
 619                 uobj->live = 0;
 620
 621         put_uobj_write(uobj);
 622
 623         if (ret)
 624                 return ret;
 625
 626         idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
 627
 628         mutex_lock(&file->mutex);
 629         list_del(&uobj->list);
 630         mutex_unlock(&file->mutex);
 631
 632         put_uobj(uobj);
 633
 634         return in_len;
 635 }
 636
 637 struct xrcd_table_entry {
 638         struct rb_node  node;
 639         struct ib_xrcd *xrcd;
 640         struct inode   *inode;
 641 };
 642
 643 static int xrcd_table_insert(struct ib_uverbs_device *dev,
 644                             struct inode *inode,
 645                             struct ib_xrcd *xrcd)
 646 {
 647         struct xrcd_table_entry *entry, *scan;
 648         struct rb_node **p = &dev->xrcd_tree.rb_node;
 649         struct rb_node *parent = NULL;
 650
 651         entry = kmalloc(sizeof *entry, GFP_KERNEL);
 652         if (!entry)
 653                 return -ENOMEM;
 654
 655         entry->xrcd  = xrcd;
 656         entry->inode = inode;
 657
 658         while (*p) {
 659                 parent = *p;
 660                 scan = rb_entry(parent, struct xrcd_table_entry, node);
 661
 662                 if (inode < scan->inode) {
 663                         p = &(*p)->rb_left;
 664                 } else if (inode > scan->inode) {
 665                         p = &(*p)->rb_right;
 666                 } else {
 667                         kfree(entry);
 668                         return -EEXIST;
 669                 }
 670         }
 671
 672         rb_link_node(&entry->node, parent, p);
 673         rb_insert_color(&entry->node, &dev->xrcd_tree);
 674         igrab(inode);
 675         return 0;
 676 }
 677
 678 static struct xrcd_table_entry *xrcd_table_search(struct ib_uverbs_device *dev,
 679                                                   struct inode *inode)
 680 {
 681         struct xrcd_table_entry *entry;
 682         struct rb_node *p = dev->xrcd_tree.rb_node;
 683
 684         while (p) {
 685                 entry = rb_entry(p, struct xrcd_table_entry, node);
 686
 687                 if (inode < entry->inode)
 688                         p = p->rb_left;
 689                 else if (inode > entry->inode)
 690                         p = p->rb_right;
 691                 else
 692                         return entry;
 693         }
 694
 695         return NULL;
 696 }
 697
 698 static struct ib_xrcd *find_xrcd(struct ib_uverbs_device *dev, struct inode *inode)
 699 {
 700         struct xrcd_table_entry *entry;
 701
 702         entry = xrcd_table_search(dev, inode);
 703         if (!entry)
 704                 return NULL;
 705
 706         return entry->xrcd;
 707 }
 708
 709 static void xrcd_table_delete(struct ib_uverbs_device *dev,
 710                               struct inode *inode)
 711 {
 712         struct xrcd_table_entry *entry;
 713
 714         entry = xrcd_table_search(dev, inode);
 715         if (entry) {
 716                 iput(inode);
 717                 rb_erase(&entry->node, &dev->xrcd_tree);
 718                 kfree(entry);
 719         }
 720 }
 721
 722 ssize_t ib_uverbs_open_xrcd(struct ib_uverbs_file *file,
 723                             const char __user *buf, int in_len,
 724                             int out_len)
 725 {
 726         struct ib_uverbs_open_xrcd      cmd;
 727         struct ib_uverbs_open_xrcd_resp resp;
 728         struct ib_udata                 udata;
 729         struct ib_uxrcd_object         *obj;
 730         struct ib_xrcd                 *xrcd = NULL;
 731         struct fd                       f = {NULL, 0};
 732         struct inode                   *inode = NULL;
 733         int                             ret = 0;
 734         int                             new_xrcd = 0;
 735
 736         if (out_len < sizeof resp)
 737                 return -ENOSPC;
 738
 739         if (copy_from_user(&cmd, buf, sizeof cmd))
 740                 return -EFAULT;
 741
 742         INIT_UDATA(&udata, buf + sizeof cmd,
 743                    (unsigned long) cmd.response + sizeof resp,
 744                    in_len - sizeof cmd, out_len - sizeof  resp);
 745
 746         mutex_lock(&file->device->xrcd_tree_mutex);
 747
 748         if (cmd.fd != -1) {
 749                 /* search for file descriptor */
 750                 f = fdget(cmd.fd);
 751                 if (!f.file) {
 752                         ret = -EBADF;
 753                         goto err_tree_mutex_unlock;
 754                 }
 755
 756                 inode = file_inode(f.file);
 757                 xrcd = find_xrcd(file->device, inode);
 758                 if (!xrcd && !(cmd.oflags & O_CREAT)) {
 759                         /* no file descriptor. Need CREATE flag */
 760                         ret = -EAGAIN;
 761                         goto err_tree_mutex_unlock;
 762                 }
 763
 764                 if (xrcd && cmd.oflags & O_EXCL) {
 765                         ret = -EINVAL;
 766                         goto err_tree_mutex_unlock;
 767                 }
 768         }
 769
 770         obj = kmalloc(sizeof *obj, GFP_KERNEL);
 771         if (!obj) {
 772                 ret = -ENOMEM;
 773                 goto err_tree_mutex_unlock;
 774         }
 775
 776         init_uobj(&obj->uobject, 0, file->ucontext, &xrcd_lock_class);
 777
 778         down_write(&obj->uobject.mutex);
 779
 780         if (!xrcd) {
 781                 xrcd = file->device->ib_dev->alloc_xrcd(file->device->ib_dev,
 782                                                         file->ucontext, &udata);
 783                 if (IS_ERR(xrcd)) {
 784                         ret = PTR_ERR(xrcd);
 785                         goto err;
 786                 }
 787
 788                 xrcd->inode   = inode;
 789                 xrcd->device  = file->device->ib_dev;
 790                 atomic_set(&xrcd->usecnt, 0);
 791                 mutex_init(&xrcd->tgt_qp_mutex);
 792                 INIT_LIST_HEAD(&xrcd->tgt_qp_list);
 793                 new_xrcd = 1;
 794         }
 795
 796         atomic_set(&obj->refcnt, 0);
 797         obj->uobject.object = xrcd;
 798         ret = idr_add_uobj(&ib_uverbs_xrcd_idr, &obj->uobject);
 799         if (ret)
 800                 goto err_idr;
 801
 802         memset(&resp, 0, sizeof resp);
 803         resp.xrcd_handle = obj->uobject.id;
 804
 805         if (inode) {
 806                 if (new_xrcd) {
 807                         /* create new inode/xrcd table entry */
 808                         ret = xrcd_table_insert(file->device, inode, xrcd);
 809                         if (ret)
 810                                 goto err_insert_xrcd;
 811                 }
 812                 atomic_inc(&xrcd->usecnt);
 813         }
 814
 815         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 816                          &resp, sizeof resp)) {
 817                 ret = -EFAULT;
 818                 goto err_copy;
 819         }
 820
 821         if (f.file)
 822                 fdput(f);
 823
 824         mutex_lock(&file->mutex);
 825         list_add_tail(&obj->uobject.list, &file->ucontext->xrcd_list);
 826         mutex_unlock(&file->mutex);
 827
 828         obj->uobject.live = 1;
 829         up_write(&obj->uobject.mutex);
 830
 831         mutex_unlock(&file->device->xrcd_tree_mutex);
 832         return in_len;
 833
 834 err_copy:
 835         if (inode) {
 836                 if (new_xrcd)
 837                         xrcd_table_delete(file->device, inode);
 838                 atomic_dec(&xrcd->usecnt);
 839         }
 840
 841 err_insert_xrcd:
 842         idr_remove_uobj(&ib_uverbs_xrcd_idr, &obj->uobject);
 843
 844 err_idr:
 845         ib_dealloc_xrcd(xrcd);
 846
 847 err:
 848         put_uobj_write(&obj->uobject);
 849
 850 err_tree_mutex_unlock:
 851         if (f.file)
 852                 fdput(f);
 853
 854         mutex_unlock(&file->device->xrcd_tree_mutex);
 855
 856         return ret;
 857 }
 858
 859 ssize_t ib_uverbs_close_xrcd(struct ib_uverbs_file *file,
 860                              const char __user *buf, int in_len,
 861                              int out_len)
 862 {
 863         struct ib_uverbs_close_xrcd cmd;
 864         struct ib_uobject           *uobj;
 865         struct ib_xrcd              *xrcd = NULL;
 866         struct inode                *inode = NULL;
 867         struct ib_uxrcd_object      *obj;
 868         int                         live;
 869         int                         ret = 0;
 870
 871         if (copy_from_user(&cmd, buf, sizeof cmd))
 872                 return -EFAULT;
 873
 874         mutex_lock(&file->device->xrcd_tree_mutex);
 875         uobj = idr_write_uobj(&ib_uverbs_xrcd_idr, cmd.xrcd_handle, file->ucontext);
 876         if (!uobj) {
 877                 ret = -EINVAL;
 878                 goto out;
 879         }
 880
 881         xrcd  = uobj->object;
 882         inode = xrcd->inode;
 883         obj   = container_of(uobj, struct ib_uxrcd_object, uobject);
 884         if (atomic_read(&obj->refcnt)) {
 885                 put_uobj_write(uobj);
 886                 ret = -EBUSY;
 887                 goto out;
 888         }
 889
 890         if (!inode || atomic_dec_and_test(&xrcd->usecnt)) {
 891                 ret = ib_dealloc_xrcd(uobj->object);
 892                 if (!ret)
 893                         uobj->live = 0;
 894         }
 895
 896         live = uobj->live;
 897         if (inode && ret)
 898                 atomic_inc(&xrcd->usecnt);
 899
 900         put_uobj_write(uobj);
 901
 902         if (ret)
 903                 goto out;
 904
 905         if (inode && !live)
 906                 xrcd_table_delete(file->device, inode);
 907
 908         idr_remove_uobj(&ib_uverbs_xrcd_idr, uobj);
 909         mutex_lock(&file->mutex);
 910         list_del(&uobj->list);
 911         mutex_unlock(&file->mutex);
 912
 913         put_uobj(uobj);
 914         ret = in_len;
 915
 916 out:
 917         mutex_unlock(&file->device->xrcd_tree_mutex);
 918         return ret;
 919 }
 920
 921 void ib_uverbs_dealloc_xrcd(struct ib_uverbs_device *dev,
 922                             struct ib_xrcd *xrcd)
 923 {
 924         struct inode *inode;
 925
 926         inode = xrcd->inode;
 927         if (inode && !atomic_dec_and_test(&xrcd->usecnt))
 928                 return;
 929
 930         ib_dealloc_xrcd(xrcd);
 931
 932         if (inode)
 933                 xrcd_table_delete(dev, inode);
 934 }
 935
 936 ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
 937                          const char __user *buf, int in_len,
 938                          int out_len)
 939 {
 940         struct ib_uverbs_reg_mr      cmd;
 941         struct ib_uverbs_reg_mr_resp resp;
 942         struct ib_udata              udata;
 943         struct ib_uobject           *uobj;
 944         struct ib_pd                *pd;
 945         struct ib_mr                *mr;
 946         int                          ret;
 947
 948         if (out_len < sizeof resp)
 949                 return -ENOSPC;
 950
 951         if (copy_from_user(&cmd, buf, sizeof cmd))
 952                 return -EFAULT;
 953
 954         INIT_UDATA(&udata, buf + sizeof cmd,
 955                    (unsigned long) cmd.response + sizeof resp,
 956                    in_len - sizeof cmd, out_len - sizeof resp);
 957
 958         if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
 959                 return -EINVAL;
 960
 961         ret = ib_check_mr_access(cmd.access_flags);
 962         if (ret)
 963                 return ret;
 964
 965         uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
 966         if (!uobj)
 967                 return -ENOMEM;
 968
 969         init_uobj(uobj, 0, file->ucontext, &mr_lock_class);
 970         down_write(&uobj->mutex);
 971
 972         pd = idr_read_pd(cmd.pd_handle, file->ucontext);
 973         if (!pd) {
 974                 ret = -EINVAL;
 975                 goto err_free;
 976         }
 977
 978         if (cmd.access_flags & IB_ACCESS_ON_DEMAND) {
 979                 struct ib_device_attr attr;
 980
 981                 ret = ib_query_device(pd->device, &attr);
 982                 if (ret || !(attr.device_cap_flags &
 983                                 IB_DEVICE_ON_DEMAND_PAGING)) {
 984                         pr_debug("ODP support not available\n");
 985                         ret = -EINVAL;
 986                         goto err_put;
 987                 }
 988         }
 989
 990         mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
 991                                      cmd.access_flags, &udata);
 992         if (IS_ERR(mr)) {
 993                 ret = PTR_ERR(mr);
 994                 goto err_put;
 995         }
 996
 997         mr->device  = pd->device;
 998         mr->pd      = pd;
 999         mr->uobject = uobj;
1000         atomic_inc(&pd->usecnt);
1001         atomic_set(&mr->usecnt, 0);
1002
1003         uobj->object = mr;
1004         ret = idr_add_uobj(&ib_uverbs_mr_idr, uobj);
1005         if (ret)
1006                 goto err_unreg;
1007
1008         memset(&resp, 0, sizeof resp);
1009         resp.lkey      = mr->lkey;
1010         resp.rkey      = mr->rkey;
1011         resp.mr_handle = uobj->id;
1012
1013         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1014                          &resp, sizeof resp)) {
1015                 ret = -EFAULT;
1016                 goto err_copy;
1017         }
1018
1019         put_pd_read(pd);
1020
1021         mutex_lock(&file->mutex);
1022         list_add_tail(&uobj->list, &file->ucontext->mr_list);
1023         mutex_unlock(&file->mutex);
1024
1025         uobj->live = 1;
1026
1027         up_write(&uobj->mutex);
1028
1029         return in_len;
1030
1031 err_copy:
1032         idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
1033
1034 err_unreg:
1035         ib_dereg_mr(mr);
1036
1037 err_put:
1038         put_pd_read(pd);
1039
1040 err_free:
1041         put_uobj_write(uobj);
1042         return ret;
1043 }
1044
1045 ssize_t ib_uverbs_rereg_mr(struct ib_uverbs_file *file,
1046                            const char __user *buf, int in_len,
1047                            int out_len)
1048 {
1049         struct ib_uverbs_rereg_mr      cmd;
1050         struct ib_uverbs_rereg_mr_resp resp;
1051         struct ib_udata              udata;
1052         struct ib_pd                *pd = NULL;
1053         struct ib_mr                *mr;
1054         struct ib_pd                *old_pd;
1055         int                          ret;
1056         struct ib_uobject           *uobj;
1057
1058         if (out_len < sizeof(resp))
1059                 return -ENOSPC;
1060
1061         if (copy_from_user(&cmd, buf, sizeof(cmd)))
1062                 return -EFAULT;
1063
1064         INIT_UDATA(&udata, buf + sizeof(cmd),
1065                    (unsigned long) cmd.response + sizeof(resp),
1066                    in_len - sizeof(cmd), out_len - sizeof(resp));
1067
1068         if (cmd.flags & ~IB_MR_REREG_SUPPORTED || !cmd.flags)
1069                 return -EINVAL;
1070
1071         if ((cmd.flags & IB_MR_REREG_TRANS) &&
1072             (!cmd.start || !cmd.hca_va || 0 >= cmd.length ||
1073              (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)))
1074                         return -EINVAL;
1075
1076         uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle,
1077                               file->ucontext);
1078
1079         if (!uobj)
1080                 return -EINVAL;
1081
1082         mr = uobj->object;
1083
1084         if (cmd.flags & IB_MR_REREG_ACCESS) {
1085                 ret = ib_check_mr_access(cmd.access_flags);
1086                 if (ret)
1087                         goto put_uobjs;
1088         }
1089
1090         if (cmd.flags & IB_MR_REREG_PD) {
1091                 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1092                 if (!pd) {
1093                         ret = -EINVAL;
1094                         goto put_uobjs;
1095                 }
1096         }
1097
1098         if (atomic_read(&mr->usecnt)) {
1099                 ret = -EBUSY;
1100                 goto put_uobj_pd;
1101         }
1102
1103         old_pd = mr->pd;
1104         ret = mr->device->rereg_user_mr(mr, cmd.flags, cmd.start,
1105                                         cmd.length, cmd.hca_va,
1106                                         cmd.access_flags, pd, &udata);
1107         if (!ret) {
1108                 if (cmd.flags & IB_MR_REREG_PD) {
1109                         atomic_inc(&pd->usecnt);
1110                         mr->pd = pd;
1111                         atomic_dec(&old_pd->usecnt);
1112                 }
1113         } else {
1114                 goto put_uobj_pd;
1115         }
1116
1117         memset(&resp, 0, sizeof(resp));
1118         resp.lkey      = mr->lkey;
1119         resp.rkey      = mr->rkey;
1120
1121         if (copy_to_user((void __user *)(unsigned long)cmd.response,
1122                          &resp, sizeof(resp)))
1123                 ret = -EFAULT;
1124         else
1125                 ret = in_len;
1126
1127 put_uobj_pd:
1128         if (cmd.flags & IB_MR_REREG_PD)
1129                 put_pd_read(pd);
1130
1131 put_uobjs:
1132
1133         put_uobj_write(mr->uobject);
1134
1135         return ret;
1136 }
1137
1138 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
1139                            const char __user *buf, int in_len,
1140                            int out_len)
1141 {
1142         struct ib_uverbs_dereg_mr cmd;
1143         struct ib_mr             *mr;
1144         struct ib_uobject        *uobj;
1145         int                       ret = -EINVAL;
1146
1147         if (copy_from_user(&cmd, buf, sizeof cmd))
1148                 return -EFAULT;
1149
1150         uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle, file->ucontext);
1151         if (!uobj)
1152                 return -EINVAL;
1153
1154         mr = uobj->object;
1155
1156         ret = ib_dereg_mr(mr);
1157         if (!ret)
1158                 uobj->live = 0;
1159
1160         put_uobj_write(uobj);
1161
1162         if (ret)
1163                 return ret;
1164
1165         idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
1166
1167         mutex_lock(&file->mutex);
1168         list_del(&uobj->list);
1169         mutex_unlock(&file->mutex);
1170
1171         put_uobj(uobj);
1172
1173         return in_len;
1174 }
1175
1176 ssize_t ib_uverbs_alloc_mw(struct ib_uverbs_file *file,
1177                          const char __user *buf, int in_len,
1178                          int out_len)
1179 {
1180         struct ib_uverbs_alloc_mw      cmd;
1181         struct ib_uverbs_alloc_mw_resp resp;
1182         struct ib_uobject             *uobj;
1183         struct ib_pd                  *pd;
1184         struct ib_mw                  *mw;
1185         int                            ret;
1186
1187         if (out_len < sizeof(resp))
1188                 return -ENOSPC;
1189
1190         if (copy_from_user(&cmd, buf, sizeof(cmd)))
1191                 return -EFAULT;
1192
1193         uobj = kmalloc(sizeof(*uobj), GFP_KERNEL);
1194         if (!uobj)
1195                 return -ENOMEM;
1196
1197         init_uobj(uobj, 0, file->ucontext, &mw_lock_class);
1198         down_write(&uobj->mutex);
1199
1200         pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1201         if (!pd) {
1202                 ret = -EINVAL;
1203                 goto err_free;
1204         }
1205
1206         mw = pd->device->alloc_mw(pd, cmd.mw_type);
1207         if (IS_ERR(mw)) {
1208                 ret = PTR_ERR(mw);
1209                 goto err_put;
1210         }
1211
1212         mw->device  = pd->device;
1213         mw->pd      = pd;
1214         mw->uobject = uobj;
1215         atomic_inc(&pd->usecnt);
1216
1217         uobj->object = mw;
1218         ret = idr_add_uobj(&ib_uverbs_mw_idr, uobj);
1219         if (ret)
1220                 goto err_unalloc;
1221
1222         memset(&resp, 0, sizeof(resp));
1223         resp.rkey      = mw->rkey;
1224         resp.mw_handle = uobj->id;
1225
1226         if (copy_to_user((void __user *)(unsigned long)cmd.response,
1227                          &resp, sizeof(resp))) {
1228                 ret = -EFAULT;
1229                 goto err_copy;
1230         }
1231
1232         put_pd_read(pd);
1233
1234         mutex_lock(&file->mutex);
1235         list_add_tail(&uobj->list, &file->ucontext->mw_list);
1236         mutex_unlock(&file->mutex);
1237
1238         uobj->live = 1;
1239
1240         up_write(&uobj->mutex);
1241
1242         return in_len;
1243
1244 err_copy:
1245         idr_remove_uobj(&ib_uverbs_mw_idr, uobj);
1246
1247 err_unalloc:
1248         ib_dealloc_mw(mw);
1249
1250 err_put:
1251         put_pd_read(pd);
1252
1253 err_free:
1254         put_uobj_write(uobj);
1255         return ret;
1256 }
1257
1258 ssize_t ib_uverbs_dealloc_mw(struct ib_uverbs_file *file,
1259                            const char __user *buf, int in_len,
1260                            int out_len)
1261 {
1262         struct ib_uverbs_dealloc_mw cmd;
1263         struct ib_mw               *mw;
1264         struct ib_uobject          *uobj;
1265         int                         ret = -EINVAL;
1266
1267         if (copy_from_user(&cmd, buf, sizeof(cmd)))
1268                 return -EFAULT;
1269
1270         uobj = idr_write_uobj(&ib_uverbs_mw_idr, cmd.mw_handle, file->ucontext);
1271         if (!uobj)
1272                 return -EINVAL;
1273
1274         mw = uobj->object;
1275
1276         ret = ib_dealloc_mw(mw);
1277         if (!ret)
1278                 uobj->live = 0;
1279
1280         put_uobj_write(uobj);
1281
1282         if (ret)
1283                 return ret;
1284
1285         idr_remove_uobj(&ib_uverbs_mw_idr, uobj);
1286
1287         mutex_lock(&file->mutex);
1288         list_del(&uobj->list);
1289         mutex_unlock(&file->mutex);
1290
1291         put_uobj(uobj);
1292
1293         return in_len;
1294 }
1295
1296 ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
1297                                       const char __user *buf, int in_len,
1298                                       int out_len)
1299 {
1300         struct ib_uverbs_create_comp_channel       cmd;
1301         struct ib_uverbs_create_comp_channel_resp  resp;
1302         struct file                               *filp;
1303         int ret;
1304
1305         if (out_len < sizeof resp)
1306                 return -ENOSPC;
1307
1308         if (copy_from_user(&cmd, buf, sizeof cmd))
1309                 return -EFAULT;
1310
1311         ret = get_unused_fd_flags(O_CLOEXEC);
1312         if (ret < 0)
1313                 return ret;
1314         resp.fd = ret;
1315
1316         filp = ib_uverbs_alloc_event_file(file, 0);
1317         if (IS_ERR(filp)) {
1318                 put_unused_fd(resp.fd);
1319                 return PTR_ERR(filp);
1320         }
1321
1322         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1323                          &resp, sizeof resp)) {
1324                 put_unused_fd(resp.fd);
1325                 fput(filp);
1326                 return -EFAULT;
1327         }
1328
1329         fd_install(resp.fd, filp);
1330         return in_len;
1331 }
1332
1333 static struct ib_ucq_object *create_cq(struct ib_uverbs_file *file,
1334                                        struct ib_udata *ucore,
1335                                        struct ib_udata *uhw,
1336                                        struct ib_uverbs_ex_create_cq *cmd,
1337                                        size_t cmd_sz,
1338                                        int (*cb)(struct ib_uverbs_file *file,
1339                                                  struct ib_ucq_object *obj,
1340                                                  struct ib_uverbs_ex_create_cq_resp *resp,
1341                                                  struct ib_udata *udata,
1342                                                  void *context),
1343                                        void *context)
1344 {
1345         struct ib_ucq_object           *obj;
1346         struct ib_uverbs_event_file    *ev_file = NULL;
1347         struct ib_cq                   *cq;
1348         int                             ret;
1349         struct ib_uverbs_ex_create_cq_resp resp;
1350         struct ib_cq_init_attr attr = {};
1351
1352         if (cmd->comp_vector >= file->device->num_comp_vectors)
1353                 return ERR_PTR(-EINVAL);
1354
1355         obj = kmalloc(sizeof *obj, GFP_KERNEL);
1356         if (!obj)
1357                 return ERR_PTR(-ENOMEM);
1358
1359         init_uobj(&obj->uobject, cmd->user_handle, file->ucontext, &cq_lock_class);
1360         down_write(&obj->uobject.mutex);
1361
1362         if (cmd->comp_channel >= 0) {
1363                 ev_file = ib_uverbs_lookup_comp_file(cmd->comp_channel);
1364                 if (!ev_file) {
1365                         ret = -EINVAL;
1366                         goto err;
1367                 }
1368         }
1369
1370         obj->uverbs_file           = file;
1371         obj->comp_events_reported  = 0;
1372         obj->async_events_reported = 0;
1373         INIT_LIST_HEAD(&obj->comp_list);
1374         INIT_LIST_HEAD(&obj->async_list);
1375
1376         attr.cqe = cmd->cqe;
1377         attr.comp_vector = cmd->comp_vector;
1378
1379         if (cmd_sz > offsetof(typeof(*cmd), flags) + sizeof(cmd->flags))
1380                 attr.flags = cmd->flags;
1381
1382         cq = file->device->ib_dev->create_cq(file->device->ib_dev, &attr,
1383                                              file->ucontext, uhw);
1384         if (IS_ERR(cq)) {
1385                 ret = PTR_ERR(cq);
1386                 goto err_file;
1387         }
1388
1389         cq->device        = file->device->ib_dev;
1390         cq->uobject       = &obj->uobject;
1391         cq->comp_handler  = ib_uverbs_comp_handler;
1392         cq->event_handler = ib_uverbs_cq_event_handler;
1393         cq->cq_context    = ev_file;
1394         atomic_set(&cq->usecnt, 0);
1395
1396         obj->uobject.object = cq;
1397         ret = idr_add_uobj(&ib_uverbs_cq_idr, &obj->uobject);
1398         if (ret)
1399                 goto err_free;
1400
1401         memset(&resp, 0, sizeof resp);
1402         resp.base.cq_handle = obj->uobject.id;
1403         resp.base.cqe       = cq->cqe;
1404
1405         resp.response_length = offsetof(typeof(resp), response_length) +
1406                 sizeof(resp.response_length);
1407
1408         ret = cb(file, obj, &resp, ucore, context);
1409         if (ret)
1410                 goto err_cb;
1411
1412         mutex_lock(&file->mutex);
1413         list_add_tail(&obj->uobject.list, &file->ucontext->cq_list);
1414         mutex_unlock(&file->mutex);
1415
1416         obj->uobject.live = 1;
1417
1418         up_write(&obj->uobject.mutex);
1419
1420         return obj;
1421
1422 err_cb:
1423         idr_remove_uobj(&ib_uverbs_cq_idr, &obj->uobject);
1424
1425 err_free:
1426         ib_destroy_cq(cq);
1427
1428 err_file:
1429         if (ev_file)
1430                 ib_uverbs_release_ucq(file, ev_file, obj);
1431
1432 err:
1433         put_uobj_write(&obj->uobject);
1434
1435         return ERR_PTR(ret);
1436 }
1437
1438 static int ib_uverbs_create_cq_cb(struct ib_uverbs_file *file,
1439                                   struct ib_ucq_object *obj,
1440                                   struct ib_uverbs_ex_create_cq_resp *resp,
1441                                   struct ib_udata *ucore, void *context)
1442 {
1443         if (ib_copy_to_udata(ucore, &resp->base, sizeof(resp->base)))
1444                 return -EFAULT;
1445
1446         return 0;
1447 }
1448
1449 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
1450                             const char __user *buf, int in_len,
1451                             int out_len)
1452 {
1453         struct ib_uverbs_create_cq      cmd;
1454         struct ib_uverbs_ex_create_cq   cmd_ex;
1455         struct ib_uverbs_create_cq_resp resp;
1456         struct ib_udata                 ucore;
1457         struct ib_udata                 uhw;
1458         struct ib_ucq_object           *obj;
1459
1460         if (out_len < sizeof(resp))
1461                 return -ENOSPC;
1462
1463         if (copy_from_user(&cmd, buf, sizeof(cmd)))
1464                 return -EFAULT;
1465
1466         INIT_UDATA(&ucore, buf, cmd.response, sizeof(cmd), sizeof(resp));
1467
1468         INIT_UDATA(&uhw, buf + sizeof(cmd),
1469                    (unsigned long)cmd.response + sizeof(resp),
1470                    in_len - sizeof(cmd), out_len - sizeof(resp));
1471
1472         memset(&cmd_ex, 0, sizeof(cmd_ex));
1473         cmd_ex.user_handle = cmd.user_handle;
1474         cmd_ex.cqe = cmd.cqe;
1475         cmd_ex.comp_vector = cmd.comp_vector;
1476         cmd_ex.comp_channel = cmd.comp_channel;
1477
1478         obj = create_cq(file, &ucore, &uhw, &cmd_ex,
1479                         offsetof(typeof(cmd_ex), comp_channel) +
1480                         sizeof(cmd.comp_channel), ib_uverbs_create_cq_cb,
1481                         NULL);
1482
1483         if (IS_ERR(obj))
1484                 return PTR_ERR(obj);
1485
1486         return in_len;
1487 }
1488
1489 static int ib_uverbs_ex_create_cq_cb(struct ib_uverbs_file *file,
1490                                      struct ib_ucq_object *obj,
1491                                      struct ib_uverbs_ex_create_cq_resp *resp,
1492                                      struct ib_udata *ucore, void *context)
1493 {
1494         if (ib_copy_to_udata(ucore, resp, resp->response_length))
1495                 return -EFAULT;
1496
1497         return 0;
1498 }
1499
1500 int ib_uverbs_ex_create_cq(struct ib_uverbs_file *file,
1501                            struct ib_udata *ucore,
1502                            struct ib_udata *uhw)
1503 {
1504         struct ib_uverbs_ex_create_cq_resp resp;
1505         struct ib_uverbs_ex_create_cq  cmd;
1506         struct ib_ucq_object           *obj;
1507         int err;
1508
1509         if (ucore->inlen < sizeof(cmd))
1510                 return -EINVAL;
1511
1512         err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
1513         if (err)
1514                 return err;
1515
1516         if (cmd.comp_mask)
1517                 return -EINVAL;
1518
1519         if (cmd.reserved)
1520                 return -EINVAL;
1521
1522         if (ucore->outlen < (offsetof(typeof(resp), response_length) +
1523                              sizeof(resp.response_length)))
1524                 return -ENOSPC;
1525
1526         obj = create_cq(file, ucore, uhw, &cmd,
1527                         min(ucore->inlen, sizeof(cmd)),
1528                         ib_uverbs_ex_create_cq_cb, NULL);
1529
1530         if (IS_ERR(obj))
1531                 return PTR_ERR(obj);
1532
1533         return 0;
1534 }
1535
1536 ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
1537                             const char __user *buf, int in_len,
1538                             int out_len)
1539 {
1540         struct ib_uverbs_resize_cq      cmd;
1541         struct ib_uverbs_resize_cq_resp resp;
1542         struct ib_udata                 udata;
1543         struct ib_cq                    *cq;
1544         int                             ret = -EINVAL;
1545
1546         if (copy_from_user(&cmd, buf, sizeof cmd))
1547                 return -EFAULT;
1548
1549         INIT_UDATA(&udata, buf + sizeof cmd,
1550                    (unsigned long) cmd.response + sizeof resp,
1551                    in_len - sizeof cmd, out_len - sizeof resp);
1552
1553         cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1554         if (!cq)
1555                 return -EINVAL;
1556
1557         ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
1558         if (ret)
1559                 goto out;
1560
1561         resp.cqe = cq->cqe;
1562
1563         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1564                          &resp, sizeof resp.cqe))
1565                 ret = -EFAULT;
1566
1567 out:
1568         put_cq_read(cq);
1569
1570         return ret ? ret : in_len;
1571 }
1572
1573 static int copy_wc_to_user(void __user *dest, struct ib_wc *wc)
1574 {
1575         struct ib_uverbs_wc tmp;
1576
1577         tmp.wr_id               = wc->wr_id;
1578         tmp.status              = wc->status;
1579         tmp.opcode              = wc->opcode;
1580         tmp.vendor_err          = wc->vendor_err;
1581         tmp.byte_len            = wc->byte_len;
1582         tmp.ex.imm_data         = (__u32 __force) wc->ex.imm_data;
1583         tmp.qp_num              = wc->qp->qp_num;
1584         tmp.src_qp              = wc->src_qp;
1585         tmp.wc_flags            = wc->wc_flags;
1586         tmp.pkey_index          = wc->pkey_index;
1587         tmp.slid                = wc->slid;
1588         tmp.sl                  = wc->sl;
1589         tmp.dlid_path_bits      = wc->dlid_path_bits;
1590         tmp.port_num            = wc->port_num;
1591         tmp.reserved            = 0;
1592
1593         if (copy_to_user(dest, &tmp, sizeof tmp))
1594                 return -EFAULT;
1595
1596         return 0;
1597 }
1598
1599 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
1600                           const char __user *buf, int in_len,
1601                           int out_len)
1602 {
1603         struct ib_uverbs_poll_cq       cmd;
1604         struct ib_uverbs_poll_cq_resp  resp;
1605         u8 __user                     *header_ptr;
1606         u8 __user                     *data_ptr;
1607         struct ib_cq                  *cq;
1608         struct ib_wc                   wc;
1609         int                            ret;
1610
1611         if (copy_from_user(&cmd, buf, sizeof cmd))
1612                 return -EFAULT;
1613
1614         cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1615         if (!cq)
1616                 return -EINVAL;
1617
1618         /* we copy a struct ib_uverbs_poll_cq_resp to user space */
1619         header_ptr = (void __user *)(unsigned long) cmd.response;
1620         data_ptr = header_ptr + sizeof resp;
1621
1622         memset(&resp, 0, sizeof resp);
1623         while (resp.count < cmd.ne) {
1624                 ret = ib_poll_cq(cq, 1, &wc);
1625                 if (ret < 0)
1626                         goto out_put;
1627                 if (!ret)
1628                         break;
1629
1630                 ret = copy_wc_to_user(data_ptr, &wc);
1631                 if (ret)
1632                         goto out_put;
1633
1634                 data_ptr += sizeof(struct ib_uverbs_wc);
1635                 ++resp.count;
1636         }
1637
1638         if (copy_to_user(header_ptr, &resp, sizeof resp)) {
1639                 ret = -EFAULT;
1640                 goto out_put;
1641         }
1642
1643         ret = in_len;
1644
1645 out_put:
1646         put_cq_read(cq);
1647         return ret;
1648 }
1649
1650 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
1651                                 const char __user *buf, int in_len,
1652                                 int out_len)
1653 {
1654         struct ib_uverbs_req_notify_cq cmd;
1655         struct ib_cq                  *cq;
1656
1657         if (copy_from_user(&cmd, buf, sizeof cmd))
1658                 return -EFAULT;
1659
1660         cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1661         if (!cq)
1662                 return -EINVAL;
1663
1664         ib_req_notify_cq(cq, cmd.solicited_only ?
1665                          IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
1666
1667         put_cq_read(cq);
1668
1669         return in_len;
1670 }
1671
1672 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
1673                              const char __user *buf, int in_len,
1674                              int out_len)
1675 {
1676         struct ib_uverbs_destroy_cq      cmd;
1677         struct ib_uverbs_destroy_cq_resp resp;
1678         struct ib_uobject               *uobj;
1679         struct ib_cq                    *cq;
1680         struct ib_ucq_object            *obj;
1681         struct ib_uverbs_event_file     *ev_file;
1682         int                              ret = -EINVAL;
1683
1684         if (copy_from_user(&cmd, buf, sizeof cmd))
1685                 return -EFAULT;
1686
1687         uobj = idr_write_uobj(&ib_uverbs_cq_idr, cmd.cq_handle, file->ucontext);
1688         if (!uobj)
1689                 return -EINVAL;
1690         cq      = uobj->object;
1691         ev_file = cq->cq_context;
1692         obj     = container_of(cq->uobject, struct ib_ucq_object, uobject);
1693
1694         ret = ib_destroy_cq(cq);
1695         if (!ret)
1696                 uobj->live = 0;
1697
1698         put_uobj_write(uobj);
1699
1700         if (ret)
1701                 return ret;
1702
1703         idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
1704
1705         mutex_lock(&file->mutex);
1706         list_del(&uobj->list);
1707         mutex_unlock(&file->mutex);
1708
1709         ib_uverbs_release_ucq(file, ev_file, obj);
1710
1711         memset(&resp, 0, sizeof resp);
1712         resp.comp_events_reported  = obj->comp_events_reported;
1713         resp.async_events_reported = obj->async_events_reported;
1714
1715         put_uobj(uobj);
1716
1717         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1718                          &resp, sizeof resp))
1719                 return -EFAULT;
1720
1721         return in_len;
1722 }
1723
1724 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1725                             const char __user *buf, int in_len,
1726                             int out_len)
1727 {
1728         struct ib_uverbs_create_qp      cmd;
1729         struct ib_uverbs_create_qp_resp resp;
1730         struct ib_udata                 udata;
1731         struct ib_uqp_object           *obj;
1732         struct ib_device               *device;
1733         struct ib_pd                   *pd = NULL;
1734         struct ib_xrcd                 *xrcd = NULL;
1735         struct ib_uobject              *uninitialized_var(xrcd_uobj);
1736         struct ib_cq                   *scq = NULL, *rcq = NULL;
1737         struct ib_srq                  *srq = NULL;
1738         struct ib_qp                   *qp;
1739         struct ib_qp_init_attr          attr;
1740         int ret;
1741
1742         if (out_len < sizeof resp)
1743                 return -ENOSPC;
1744
1745         if (copy_from_user(&cmd, buf, sizeof cmd))
1746                 return -EFAULT;
1747
1748         if (cmd.qp_type == IB_QPT_RAW_PACKET && !capable(CAP_NET_RAW))
1749                 return -EPERM;
1750
1751         INIT_UDATA(&udata, buf + sizeof cmd,
1752                    (unsigned long) cmd.response + sizeof resp,
1753                    in_len - sizeof cmd, out_len - sizeof resp);
1754
1755         obj = kzalloc(sizeof *obj, GFP_KERNEL);
1756         if (!obj)
1757                 return -ENOMEM;
1758
1759         init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_class);
1760         down_write(&obj->uevent.uobject.mutex);
1761
1762         if (cmd.qp_type == IB_QPT_XRC_TGT) {
1763                 xrcd = idr_read_xrcd(cmd.pd_handle, file->ucontext, &xrcd_uobj);
1764                 if (!xrcd) {
1765                         ret = -EINVAL;
1766                         goto err_put;
1767                 }
1768                 device = xrcd->device;
1769         } else {
1770                 if (cmd.qp_type == IB_QPT_XRC_INI) {
1771                         cmd.max_recv_wr = cmd.max_recv_sge = 0;
1772                 } else {
1773                         if (cmd.is_srq) {
1774                                 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
1775                                 if (!srq || srq->srq_type != IB_SRQT_BASIC) {
1776                                         ret = -EINVAL;
1777                                         goto err_put;
1778                                 }
1779                         }
1780
1781                         if (cmd.recv_cq_handle != cmd.send_cq_handle) {
1782                                 rcq = idr_read_cq(cmd.recv_cq_handle, file->ucontext, 0);
1783                                 if (!rcq) {
1784                                         ret = -EINVAL;
1785                                         goto err_put;
1786                                 }
1787                         }
1788                 }
1789
1790                 scq = idr_read_cq(cmd.send_cq_handle, file->ucontext, !!rcq);
1791                 rcq = rcq ?: scq;
1792                 pd  = idr_read_pd(cmd.pd_handle, file->ucontext);
1793                 if (!pd || !scq) {
1794                         ret = -EINVAL;
1795                         goto err_put;
1796                 }
1797
1798                 device = pd->device;
1799         }
1800
1801         attr.event_handler = ib_uverbs_qp_event_handler;
1802         attr.qp_context    = file;
1803         attr.send_cq       = scq;
1804         attr.recv_cq       = rcq;
1805         attr.srq           = srq;
1806         attr.xrcd          = xrcd;
1807         attr.sq_sig_type   = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
1808         attr.qp_type       = cmd.qp_type;
1809         attr.create_flags  = 0;
1810
1811         attr.cap.max_send_wr     = cmd.max_send_wr;
1812         attr.cap.max_recv_wr     = cmd.max_recv_wr;
1813         attr.cap.max_send_sge    = cmd.max_send_sge;
1814         attr.cap.max_recv_sge    = cmd.max_recv_sge;
1815         attr.cap.max_inline_data = cmd.max_inline_data;
1816
1817         obj->uevent.events_reported     = 0;
1818         INIT_LIST_HEAD(&obj->uevent.event_list);
1819         INIT_LIST_HEAD(&obj->mcast_list);
1820
1821         if (cmd.qp_type == IB_QPT_XRC_TGT)
1822                 qp = ib_create_qp(pd, &attr);
1823         else
1824                 qp = device->create_qp(pd, &attr, &udata);
1825
1826         if (IS_ERR(qp)) {
1827                 ret = PTR_ERR(qp);
1828                 goto err_put;
1829         }
1830
1831         if (cmd.qp_type != IB_QPT_XRC_TGT) {
1832                 qp->real_qp       = qp;
1833                 qp->device        = device;
1834                 qp->pd            = pd;
1835                 qp->send_cq       = attr.send_cq;
1836                 qp->recv_cq       = attr.recv_cq;
1837                 qp->srq           = attr.srq;
1838                 qp->event_handler = attr.event_handler;
1839                 qp->qp_context    = attr.qp_context;
1840                 qp->qp_type       = attr.qp_type;
1841                 atomic_set(&qp->usecnt, 0);
1842                 atomic_inc(&pd->usecnt);
1843                 atomic_inc(&attr.send_cq->usecnt);
1844                 if (attr.recv_cq)
1845                         atomic_inc(&attr.recv_cq->usecnt);
1846                 if (attr.srq)
1847                         atomic_inc(&attr.srq->usecnt);
1848         }
1849         qp->uobject = &obj->uevent.uobject;
1850
1851         obj->uevent.uobject.object = qp;
1852         ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1853         if (ret)
1854                 goto err_destroy;
1855
1856         memset(&resp, 0, sizeof resp);
1857         resp.qpn             = qp->qp_num;
1858         resp.qp_handle       = obj->uevent.uobject.id;
1859         resp.max_recv_sge    = attr.cap.max_recv_sge;
1860         resp.max_send_sge    = attr.cap.max_send_sge;
1861         resp.max_recv_wr     = attr.cap.max_recv_wr;
1862         resp.max_send_wr     = attr.cap.max_send_wr;
1863         resp.max_inline_data = attr.cap.max_inline_data;
1864
1865         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1866                          &resp, sizeof resp)) {
1867                 ret = -EFAULT;
1868                 goto err_copy;
1869         }
1870
1871         if (xrcd) {
1872                 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object,
1873                                           uobject);
1874                 atomic_inc(&obj->uxrcd->refcnt);
1875                 put_xrcd_read(xrcd_uobj);
1876         }
1877
1878         if (pd)
1879                 put_pd_read(pd);
1880         if (scq)
1881                 put_cq_read(scq);
1882         if (rcq && rcq != scq)
1883                 put_cq_read(rcq);
1884         if (srq)
1885                 put_srq_read(srq);
1886
1887         mutex_lock(&file->mutex);
1888         list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1889         mutex_unlock(&file->mutex);
1890
1891         obj->uevent.uobject.live = 1;
1892
1893         up_write(&obj->uevent.uobject.mutex);
1894
1895         return in_len;
1896
1897 err_copy:
1898         idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1899
1900 err_destroy:
1901         ib_destroy_qp(qp);
1902
1903 err_put:
1904         if (xrcd)
1905                 put_xrcd_read(xrcd_uobj);
1906         if (pd)
1907                 put_pd_read(pd);
1908         if (scq)
1909                 put_cq_read(scq);
1910         if (rcq && rcq != scq)
1911                 put_cq_read(rcq);
1912         if (srq)
1913                 put_srq_read(srq);
1914
1915         put_uobj_write(&obj->uevent.uobject);
1916         return ret;
1917 }
1918
1919 ssize_t ib_uverbs_open_qp(struct ib_uverbs_file *file,
1920                           const char __user *buf, int in_len, int out_len)
1921 {
1922         struct ib_uverbs_open_qp        cmd;
1923         struct ib_uverbs_create_qp_resp resp;
1924         struct ib_udata                 udata;
1925         struct ib_uqp_object           *obj;
1926         struct ib_xrcd                 *xrcd;
1927         struct ib_uobject              *uninitialized_var(xrcd_uobj);
1928         struct ib_qp                   *qp;
1929         struct ib_qp_open_attr          attr;
1930         int ret;
1931
1932         if (out_len < sizeof resp)
1933                 return -ENOSPC;
1934
1935         if (copy_from_user(&cmd, buf, sizeof cmd))
1936                 return -EFAULT;
1937
1938         INIT_UDATA(&udata, buf + sizeof cmd,
1939                    (unsigned long) cmd.response + sizeof resp,
1940                    in_len - sizeof cmd, out_len - sizeof resp);
1941
1942         obj = kmalloc(sizeof *obj, GFP_KERNEL);
1943         if (!obj)
1944                 return -ENOMEM;
1945
1946         init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_class);
1947         down_write(&obj->uevent.uobject.mutex);
1948
1949         xrcd = idr_read_xrcd(cmd.pd_handle, file->ucontext, &xrcd_uobj);
1950         if (!xrcd) {
1951                 ret = -EINVAL;
1952                 goto err_put;
1953         }
1954
1955         attr.event_handler = ib_uverbs_qp_event_handler;
1956         attr.qp_context    = file;
1957         attr.qp_num        = cmd.qpn;
1958         attr.qp_type       = cmd.qp_type;
1959
1960         obj->uevent.events_reported = 0;
1961         INIT_LIST_HEAD(&obj->uevent.event_list);
1962         INIT_LIST_HEAD(&obj->mcast_list);
1963
1964         qp = ib_open_qp(xrcd, &attr);
1965         if (IS_ERR(qp)) {
1966                 ret = PTR_ERR(qp);
1967                 goto err_put;
1968         }
1969
1970         qp->uobject = &obj->uevent.uobject;
1971
1972         obj->uevent.uobject.object = qp;
1973         ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1974         if (ret)
1975                 goto err_destroy;
1976
1977         memset(&resp, 0, sizeof resp);
1978         resp.qpn       = qp->qp_num;
1979         resp.qp_handle = obj->uevent.uobject.id;
1980
1981         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1982                          &resp, sizeof resp)) {
1983                 ret = -EFAULT;
1984                 goto err_remove;
1985         }
1986
1987         obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
1988         atomic_inc(&obj->uxrcd->refcnt);
1989         put_xrcd_read(xrcd_uobj);
1990
1991         mutex_lock(&file->mutex);
1992         list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1993         mutex_unlock(&file->mutex);
1994
1995         obj->uevent.uobject.live = 1;
1996
1997         up_write(&obj->uevent.uobject.mutex);
1998
1999         return in_len;
2000
2001 err_remove:
2002         idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
2003
2004 err_destroy:
2005         ib_destroy_qp(qp);
2006
2007 err_put:
2008         put_xrcd_read(xrcd_uobj);
2009         put_uobj_write(&obj->uevent.uobject);
2010         return ret;
2011 }
2012
2013 ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
2014                            const char __user *buf, int in_len,
2015                            int out_len)
2016 {
2017         struct ib_uverbs_query_qp      cmd;
2018         struct ib_uverbs_query_qp_resp resp;
2019         struct ib_qp                   *qp;
2020         struct ib_qp_attr              *attr;
2021         struct ib_qp_init_attr         *init_attr;
2022         int                            ret;
2023
2024         if (copy_from_user(&cmd, buf, sizeof cmd))
2025                 return -EFAULT;
2026
2027         attr      = kmalloc(sizeof *attr, GFP_KERNEL);
2028         init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
2029         if (!attr || !init_attr) {
2030                 ret = -ENOMEM;
2031                 goto out;
2032         }
2033
2034         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2035         if (!qp) {
2036                 ret = -EINVAL;
2037                 goto out;
2038         }
2039
2040         ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
2041
2042         put_qp_read(qp);
2043
2044         if (ret)
2045                 goto out;
2046
2047         memset(&resp, 0, sizeof resp);
2048
2049         resp.qp_state               = attr->qp_state;
2050         resp.cur_qp_state           = attr->cur_qp_state;
2051         resp.path_mtu               = attr->path_mtu;
2052         resp.path_mig_state         = attr->path_mig_state;
2053         resp.qkey                   = attr->qkey;
2054         resp.rq_psn                 = attr->rq_psn;
2055         resp.sq_psn                 = attr->sq_psn;
2056         resp.dest_qp_num            = attr->dest_qp_num;
2057         resp.qp_access_flags        = attr->qp_access_flags;
2058         resp.pkey_index             = attr->pkey_index;
2059         resp.alt_pkey_index         = attr->alt_pkey_index;
2060         resp.sq_draining            = attr->sq_draining;
2061         resp.max_rd_atomic          = attr->max_rd_atomic;
2062         resp.max_dest_rd_atomic     = attr->max_dest_rd_atomic;
2063         resp.min_rnr_timer          = attr->min_rnr_timer;
2064         resp.port_num               = attr->port_num;
2065         resp.timeout                = attr->timeout;
2066         resp.retry_cnt              = attr->retry_cnt;
2067         resp.rnr_retry              = attr->rnr_retry;
2068         resp.alt_port_num           = attr->alt_port_num;
2069         resp.alt_timeout            = attr->alt_timeout;
2070
2071         memcpy(resp.dest.dgid, attr->ah_attr.grh.dgid.raw, 16);
2072         resp.dest.flow_label        = attr->ah_attr.grh.flow_label;
2073         resp.dest.sgid_index        = attr->ah_attr.grh.sgid_index;
2074         resp.dest.hop_limit         = attr->ah_attr.grh.hop_limit;
2075         resp.dest.traffic_class     = attr->ah_attr.grh.traffic_class;
2076         resp.dest.dlid              = attr->ah_attr.dlid;
2077         resp.dest.sl                = attr->ah_attr.sl;
2078         resp.dest.src_path_bits     = attr->ah_attr.src_path_bits;
2079         resp.dest.static_rate       = attr->ah_attr.static_rate;
2080         resp.dest.is_global         = !!(attr->ah_attr.ah_flags & IB_AH_GRH);
2081         resp.dest.port_num          = attr->ah_attr.port_num;
2082
2083         memcpy(resp.alt_dest.dgid, attr->alt_ah_attr.grh.dgid.raw, 16);
2084         resp.alt_dest.flow_label    = attr->alt_ah_attr.grh.flow_label;
2085         resp.alt_dest.sgid_index    = attr->alt_ah_attr.grh.sgid_index;
2086         resp.alt_dest.hop_limit     = attr->alt_ah_attr.grh.hop_limit;
2087         resp.alt_dest.traffic_class = attr->alt_ah_attr.grh.traffic_class;
2088         resp.alt_dest.dlid          = attr->alt_ah_attr.dlid;
2089         resp.alt_dest.sl            = attr->alt_ah_attr.sl;
2090         resp.alt_dest.src_path_bits = attr->alt_ah_attr.src_path_bits;
2091         resp.alt_dest.static_rate   = attr->alt_ah_attr.static_rate;
2092         resp.alt_dest.is_global     = !!(attr->alt_ah_attr.ah_flags & IB_AH_GRH);
2093         resp.alt_dest.port_num      = attr->alt_ah_attr.port_num;
2094
2095         resp.max_send_wr            = init_attr->cap.max_send_wr;
2096         resp.max_recv_wr            = init_attr->cap.max_recv_wr;
2097         resp.max_send_sge           = init_attr->cap.max_send_sge;
2098         resp.max_recv_sge           = init_attr->cap.max_recv_sge;
2099         resp.max_inline_data        = init_attr->cap.max_inline_data;
2100         resp.sq_sig_all             = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
2101
2102         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2103                          &resp, sizeof resp))
2104                 ret = -EFAULT;
2105
2106 out:
2107         kfree(attr);
2108         kfree(init_attr);
2109
2110         return ret ? ret : in_len;
2111 }
2112
2113 /* Remove ignored fields set in the attribute mask */
2114 static int modify_qp_mask(enum ib_qp_type qp_type, int mask)
2115 {
2116         switch (qp_type) {
2117         case IB_QPT_XRC_INI:
2118                 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER);
2119         case IB_QPT_XRC_TGT:
2120                 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT |
2121                                 IB_QP_RNR_RETRY);
2122         default:
2123                 return mask;
2124         }
2125 }
2126
2127 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
2128                             const char __user *buf, int in_len,
2129                             int out_len)
2130 {
2131         struct ib_uverbs_modify_qp cmd;
2132         struct ib_udata            udata;
2133         struct ib_qp              *qp;
2134         struct ib_qp_attr         *attr;
2135         int                        ret;
2136
2137         if (copy_from_user(&cmd, buf, sizeof cmd))
2138                 return -EFAULT;
2139
2140         INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
2141                    out_len);
2142
2143         attr = kmalloc(sizeof *attr, GFP_KERNEL);
2144         if (!attr)
2145                 return -ENOMEM;
2146
2147         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2148         if (!qp) {
2149                 ret = -EINVAL;
2150                 goto out;
2151         }
2152
2153         attr->qp_state            = cmd.qp_state;
2154         attr->cur_qp_state        = cmd.cur_qp_state;
2155         attr->path_mtu            = cmd.path_mtu;
2156         attr->path_mig_state      = cmd.path_mig_state;
2157         attr->qkey                = cmd.qkey;
2158         attr->rq_psn              = cmd.rq_psn;
2159         attr->sq_psn              = cmd.sq_psn;
2160         attr->dest_qp_num         = cmd.dest_qp_num;
2161         attr->qp_access_flags     = cmd.qp_access_flags;
2162         attr->pkey_index          = cmd.pkey_index;
2163         attr->alt_pkey_index      = cmd.alt_pkey_index;
2164         attr->en_sqd_async_notify = cmd.en_sqd_async_notify;
2165         attr->max_rd_atomic       = cmd.max_rd_atomic;
2166         attr->max_dest_rd_atomic  = cmd.max_dest_rd_atomic;
2167         attr->min_rnr_timer       = cmd.min_rnr_timer;
2168         attr->port_num            = cmd.port_num;
2169         attr->timeout             = cmd.timeout;
2170         attr->retry_cnt           = cmd.retry_cnt;
2171         attr->rnr_retry           = cmd.rnr_retry;
2172         attr->alt_port_num        = cmd.alt_port_num;
2173         attr->alt_timeout         = cmd.alt_timeout;
2174
2175         memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16);
2176         attr->ah_attr.grh.flow_label        = cmd.dest.flow_label;
2177         attr->ah_attr.grh.sgid_index        = cmd.dest.sgid_index;
2178         attr->ah_attr.grh.hop_limit         = cmd.dest.hop_limit;
2179         attr->ah_attr.grh.traffic_class     = cmd.dest.traffic_class;
2180         attr->ah_attr.dlid                  = cmd.dest.dlid;
2181         attr->ah_attr.sl                    = cmd.dest.sl;
2182         attr->ah_attr.src_path_bits         = cmd.dest.src_path_bits;
2183         attr->ah_attr.static_rate           = cmd.dest.static_rate;
2184         attr->ah_attr.ah_flags              = cmd.dest.is_global ? IB_AH_GRH : 0;
2185         attr->ah_attr.port_num              = cmd.dest.port_num;
2186
2187         memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16);
2188         attr->alt_ah_attr.grh.flow_label    = cmd.alt_dest.flow_label;
2189         attr->alt_ah_attr.grh.sgid_index    = cmd.alt_dest.sgid_index;
2190         attr->alt_ah_attr.grh.hop_limit     = cmd.alt_dest.hop_limit;
2191         attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class;
2192         attr->alt_ah_attr.dlid              = cmd.alt_dest.dlid;
2193         attr->alt_ah_attr.sl                = cmd.alt_dest.sl;
2194         attr->alt_ah_attr.src_path_bits     = cmd.alt_dest.src_path_bits;
2195         attr->alt_ah_attr.static_rate       = cmd.alt_dest.static_rate;
2196         attr->alt_ah_attr.ah_flags          = cmd.alt_dest.is_global ? IB_AH_GRH : 0;
2197         attr->alt_ah_attr.port_num          = cmd.alt_dest.port_num;
2198
2199         if (qp->real_qp == qp) {
2200                 ret = ib_resolve_eth_l2_attrs(qp, attr, &cmd.attr_mask);
2201                 if (ret)
2202                         goto release_qp;
2203                 ret = qp->device->modify_qp(qp, attr,
2204                         modify_qp_mask(qp->qp_type, cmd.attr_mask), &udata);
2205         } else {
2206                 ret = ib_modify_qp(qp, attr, modify_qp_mask(qp->qp_type, cmd.attr_mask));
2207         }
2208
2209         if (ret)
2210                 goto release_qp;
2211
2212         ret = in_len;
2213
2214 release_qp:
2215         put_qp_read(qp);
2216
2217 out:
2218         kfree(attr);
2219
2220         return ret;
2221 }
2222
2223 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
2224                              const char __user *buf, int in_len,
2225                              int out_len)
2226 {
2227         struct ib_uverbs_destroy_qp      cmd;
2228         struct ib_uverbs_destroy_qp_resp resp;
2229         struct ib_uobject               *uobj;
2230         struct ib_qp                    *qp;
2231         struct ib_uqp_object            *obj;
2232         int                              ret = -EINVAL;
2233
2234         if (copy_from_user(&cmd, buf, sizeof cmd))
2235                 return -EFAULT;
2236
2237         memset(&resp, 0, sizeof resp);
2238
2239         uobj = idr_write_uobj(&ib_uverbs_qp_idr, cmd.qp_handle, file->ucontext);
2240         if (!uobj)
2241                 return -EINVAL;
2242         qp  = uobj->object;
2243         obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
2244
2245         if (!list_empty(&obj->mcast_list)) {
2246                 put_uobj_write(uobj);
2247                 return -EBUSY;
2248         }
2249
2250         ret = ib_destroy_qp(qp);
2251         if (!ret)
2252                 uobj->live = 0;
2253
2254         put_uobj_write(uobj);
2255
2256         if (ret)
2257                 return ret;
2258
2259         if (obj->uxrcd)
2260                 atomic_dec(&obj->uxrcd->refcnt);
2261
2262         idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
2263
2264         mutex_lock(&file->mutex);
2265         list_del(&uobj->list);
2266         mutex_unlock(&file->mutex);
2267
2268         ib_uverbs_release_uevent(file, &obj->uevent);
2269
2270         resp.events_reported = obj->uevent.events_reported;
2271
2272         put_uobj(uobj);
2273
2274         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2275                          &resp, sizeof resp))
2276                 return -EFAULT;
2277
2278         return in_len;
2279 }
2280
2281 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
2282                             const char __user *buf, int in_len,
2283                             int out_len)
2284 {
2285         struct ib_uverbs_post_send      cmd;
2286         struct ib_uverbs_post_send_resp resp;
2287         struct ib_uverbs_send_wr       *user_wr;
2288         struct ib_send_wr              *wr = NULL, *last, *next, *bad_wr;
2289         struct ib_qp                   *qp;
2290         int                             i, sg_ind;
2291         int                             is_ud;
2292         ssize_t                         ret = -EINVAL;
2293
2294         if (copy_from_user(&cmd, buf, sizeof cmd))
2295                 return -EFAULT;
2296
2297         if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
2298             cmd.sge_count * sizeof (struct ib_uverbs_sge))
2299                 return -EINVAL;
2300
2301         if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
2302                 return -EINVAL;
2303
2304         user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
2305         if (!user_wr)
2306                 return -ENOMEM;
2307
2308         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2309         if (!qp)
2310                 goto out;
2311
2312         is_ud = qp->qp_type == IB_QPT_UD;
2313         sg_ind = 0;
2314         last = NULL;
2315         for (i = 0; i < cmd.wr_count; ++i) {
2316                 if (copy_from_user(user_wr,
2317                                    buf + sizeof cmd + i * cmd.wqe_size,
2318                                    cmd.wqe_size)) {
2319                         ret = -EFAULT;
2320                         goto out_put;
2321                 }
2322
2323                 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
2324                         ret = -EINVAL;
2325                         goto out_put;
2326                 }
2327
2328                 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2329                                user_wr->num_sge * sizeof (struct ib_sge),
2330                                GFP_KERNEL);
2331                 if (!next) {
2332                         ret = -ENOMEM;
2333                         goto out_put;
2334                 }
2335
2336                 if (!last)
2337                         wr = next;
2338                 else
2339                         last->next = next;
2340                 last = next;
2341
2342                 next->next       = NULL;
2343                 next->wr_id      = user_wr->wr_id;
2344                 next->num_sge    = user_wr->num_sge;
2345                 next->opcode     = user_wr->opcode;
2346                 next->send_flags = user_wr->send_flags;
2347
2348                 if (is_ud) {
2349                         next->wr.ud.ah = idr_read_ah(user_wr->wr.ud.ah,
2350                                                      file->ucontext);
2351                         if (!next->wr.ud.ah) {
2352                                 ret = -EINVAL;
2353                                 goto out_put;
2354                         }
2355                         next->wr.ud.remote_qpn  = user_wr->wr.ud.remote_qpn;
2356                         next->wr.ud.remote_qkey = user_wr->wr.ud.remote_qkey;
2357                         if (next->opcode == IB_WR_SEND_WITH_IMM)
2358                                 next->ex.imm_data =
2359                                         (__be32 __force) user_wr->ex.imm_data;
2360                 } else {
2361                         switch (next->opcode) {
2362                         case IB_WR_RDMA_WRITE_WITH_IMM:
2363                                 next->ex.imm_data =
2364                                         (__be32 __force) user_wr->ex.imm_data;
2365                         case IB_WR_RDMA_WRITE:
2366                         case IB_WR_RDMA_READ:
2367                                 next->wr.rdma.remote_addr =
2368                                         user_wr->wr.rdma.remote_addr;
2369                                 next->wr.rdma.rkey        =
2370                                         user_wr->wr.rdma.rkey;
2371                                 break;
2372                         case IB_WR_SEND_WITH_IMM:
2373                                 next->ex.imm_data =
2374                                         (__be32 __force) user_wr->ex.imm_data;
2375                                 break;
2376                         case IB_WR_SEND_WITH_INV:
2377                                 next->ex.invalidate_rkey =
2378                                         user_wr->ex.invalidate_rkey;
2379                                 break;
2380                         case IB_WR_ATOMIC_CMP_AND_SWP:
2381                         case IB_WR_ATOMIC_FETCH_AND_ADD:
2382                                 next->wr.atomic.remote_addr =
2383                                         user_wr->wr.atomic.remote_addr;
2384                                 next->wr.atomic.compare_add =
2385                                         user_wr->wr.atomic.compare_add;
2386                                 next->wr.atomic.swap = user_wr->wr.atomic.swap;
2387                                 next->wr.atomic.rkey = user_wr->wr.atomic.rkey;
2388                                 break;
2389                         default:
2390                                 break;
2391                         }
2392                 }
2393
2394                 if (next->num_sge) {
2395                         next->sg_list = (void *) next +
2396                                 ALIGN(sizeof *next, sizeof (struct ib_sge));
2397                         if (copy_from_user(next->sg_list,
2398                                            buf + sizeof cmd +
2399                                            cmd.wr_count * cmd.wqe_size +
2400                                            sg_ind * sizeof (struct ib_sge),
2401                                            next->num_sge * sizeof (struct ib_sge))) {
2402                                 ret = -EFAULT;
2403                                 goto out_put;
2404                         }
2405                         sg_ind += next->num_sge;
2406                 } else
2407                         next->sg_list = NULL;
2408         }
2409
2410         resp.bad_wr = 0;
2411         ret = qp->device->post_send(qp->real_qp, wr, &bad_wr);
2412         if (ret)
2413                 for (next = wr; next; next = next->next) {
2414                         ++resp.bad_wr;
2415                         if (next == bad_wr)
2416                                 break;
2417                 }
2418
2419         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2420                          &resp, sizeof resp))
2421                 ret = -EFAULT;
2422
2423 out_put:
2424         put_qp_read(qp);
2425
2426         while (wr) {
2427                 if (is_ud && wr->wr.ud.ah)
2428                         put_ah_read(wr->wr.ud.ah);
2429                 next = wr->next;
2430                 kfree(wr);
2431                 wr = next;
2432         }
2433
2434 out:
2435         kfree(user_wr);
2436
2437         return ret ? ret : in_len;
2438 }
2439
2440 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
2441                                                     int in_len,
2442                                                     u32 wr_count,
2443                                                     u32 sge_count,
2444                                                     u32 wqe_size)
2445 {
2446         struct ib_uverbs_recv_wr *user_wr;
2447         struct ib_recv_wr        *wr = NULL, *last, *next;
2448         int                       sg_ind;
2449         int                       i;
2450         int                       ret;
2451
2452         if (in_len < wqe_size * wr_count +
2453             sge_count * sizeof (struct ib_uverbs_sge))
2454                 return ERR_PTR(-EINVAL);
2455
2456         if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
2457                 return ERR_PTR(-EINVAL);
2458
2459         user_wr = kmalloc(wqe_size, GFP_KERNEL);
2460         if (!user_wr)
2461                 return ERR_PTR(-ENOMEM);
2462
2463         sg_ind = 0;
2464         last = NULL;
2465         for (i = 0; i < wr_count; ++i) {
2466                 if (copy_from_user(user_wr, buf + i * wqe_size,
2467                                    wqe_size)) {
2468                         ret = -EFAULT;
2469                         goto err;
2470                 }
2471
2472                 if (user_wr->num_sge + sg_ind > sge_count) {
2473                         ret = -EINVAL;
2474                         goto err;
2475                 }
2476
2477                 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2478                                user_wr->num_sge * sizeof (struct ib_sge),
2479                                GFP_KERNEL);
2480                 if (!next) {
2481                         ret = -ENOMEM;
2482                         goto err;
2483                 }
2484
2485                 if (!last)
2486                         wr = next;
2487                 else
2488                         last->next = next;
2489                 last = next;
2490
2491                 next->next       = NULL;
2492                 next->wr_id      = user_wr->wr_id;
2493                 next->num_sge    = user_wr->num_sge;
2494
2495                 if (next->num_sge) {
2496                         next->sg_list = (void *) next +
2497                                 ALIGN(sizeof *next, sizeof (struct ib_sge));
2498                         if (copy_from_user(next->sg_list,
2499                                            buf + wr_count * wqe_size +
2500                                            sg_ind * sizeof (struct ib_sge),
2501                                            next->num_sge * sizeof (struct ib_sge))) {
2502                                 ret = -EFAULT;
2503                                 goto err;
2504                         }
2505                         sg_ind += next->num_sge;
2506                 } else
2507                         next->sg_list = NULL;
2508         }
2509
2510         kfree(user_wr);
2511         return wr;
2512
2513 err:
2514         kfree(user_wr);
2515
2516         while (wr) {
2517                 next = wr->next;
2518                 kfree(wr);
2519                 wr = next;
2520         }
2521
2522         return ERR_PTR(ret);
2523 }
2524
2525 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
2526                             const char __user *buf, int in_len,
2527                             int out_len)
2528 {
2529         struct ib_uverbs_post_recv      cmd;
2530         struct ib_uverbs_post_recv_resp resp;
2531         struct ib_recv_wr              *wr, *next, *bad_wr;
2532         struct ib_qp                   *qp;
2533         ssize_t                         ret = -EINVAL;
2534
2535         if (copy_from_user(&cmd, buf, sizeof cmd))
2536                 return -EFAULT;
2537
2538         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2539                                        in_len - sizeof cmd, cmd.wr_count,
2540                                        cmd.sge_count, cmd.wqe_size);
2541         if (IS_ERR(wr))
2542                 return PTR_ERR(wr);
2543
2544         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2545         if (!qp)
2546                 goto out;
2547
2548         resp.bad_wr = 0;
2549         ret = qp->device->post_recv(qp->real_qp, wr, &bad_wr);
2550
2551         put_qp_read(qp);
2552
2553         if (ret)
2554                 for (next = wr; next; next = next->next) {
2555                         ++resp.bad_wr;
2556                         if (next == bad_wr)
2557                                 break;
2558                 }
2559
2560         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2561                          &resp, sizeof resp))
2562                 ret = -EFAULT;
2563
2564 out:
2565         while (wr) {
2566                 next = wr->next;
2567                 kfree(wr);
2568                 wr = next;
2569         }
2570
2571         return ret ? ret : in_len;
2572 }
2573
2574 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
2575                                 const char __user *buf, int in_len,
2576                                 int out_len)
2577 {
2578         struct ib_uverbs_post_srq_recv      cmd;
2579         struct ib_uverbs_post_srq_recv_resp resp;
2580         struct ib_recv_wr                  *wr, *next, *bad_wr;
2581         struct ib_srq                      *srq;
2582         ssize_t                             ret = -EINVAL;
2583
2584         if (copy_from_user(&cmd, buf, sizeof cmd))
2585                 return -EFAULT;
2586
2587         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2588                                        in_len - sizeof cmd, cmd.wr_count,
2589                                        cmd.sge_count, cmd.wqe_size);
2590         if (IS_ERR(wr))
2591                 return PTR_ERR(wr);
2592
2593         srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2594         if (!srq)
2595                 goto out;
2596
2597         resp.bad_wr = 0;
2598         ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
2599
2600         put_srq_read(srq);
2601
2602         if (ret)
2603                 for (next = wr; next; next = next->next) {
2604                         ++resp.bad_wr;
2605                         if (next == bad_wr)
2606                                 break;
2607                 }
2608
2609         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2610                          &resp, sizeof resp))
2611                 ret = -EFAULT;
2612
2613 out:
2614         while (wr) {
2615                 next = wr->next;
2616                 kfree(wr);
2617                 wr = next;
2618         }
2619
2620         return ret ? ret : in_len;
2621 }
2622
2623 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
2624                             const char __user *buf, int in_len,
2625                             int out_len)
2626 {
2627         struct ib_uverbs_create_ah       cmd;
2628         struct ib_uverbs_create_ah_resp  resp;
2629         struct ib_uobject               *uobj;
2630         struct ib_pd                    *pd;
2631         struct ib_ah                    *ah;
2632         struct ib_ah_attr               attr;
2633         int ret;
2634
2635         if (out_len < sizeof resp)
2636                 return -ENOSPC;
2637
2638         if (copy_from_user(&cmd, buf, sizeof cmd))
2639                 return -EFAULT;
2640
2641         uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
2642         if (!uobj)
2643                 return -ENOMEM;
2644
2645         init_uobj(uobj, cmd.user_handle, file->ucontext, &ah_lock_class);
2646         down_write(&uobj->mutex);
2647
2648         pd = idr_read_pd(cmd.pd_handle, file->ucontext);
2649         if (!pd) {
2650                 ret = -EINVAL;
2651                 goto err;
2652         }
2653
2654         attr.dlid              = cmd.attr.dlid;
2655         attr.sl                = cmd.attr.sl;
2656         attr.src_path_bits     = cmd.attr.src_path_bits;
2657         attr.static_rate       = cmd.attr.static_rate;
2658         attr.ah_flags          = cmd.attr.is_global ? IB_AH_GRH : 0;
2659         attr.port_num          = cmd.attr.port_num;
2660         attr.grh.flow_label    = cmd.attr.grh.flow_label;
2661         attr.grh.sgid_index    = cmd.attr.grh.sgid_index;
2662         attr.grh.hop_limit     = cmd.attr.grh.hop_limit;
2663         attr.grh.traffic_class = cmd.attr.grh.traffic_class;
2664         attr.vlan_id           = 0;
2665         memset(&attr.dmac, 0, sizeof(attr.dmac));
2666         memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16);
2667
2668         ah = ib_create_ah(pd, &attr);
2669         if (IS_ERR(ah)) {
2670                 ret = PTR_ERR(ah);
2671                 goto err_put;
2672         }
2673
2674         ah->uobject  = uobj;
2675         uobj->object = ah;
2676
2677         ret = idr_add_uobj(&ib_uverbs_ah_idr, uobj);
2678         if (ret)
2679                 goto err_destroy;
2680
2681         resp.ah_handle = uobj->id;
2682
2683         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2684                          &resp, sizeof resp)) {
2685                 ret = -EFAULT;
2686                 goto err_copy;
2687         }
2688
2689         put_pd_read(pd);
2690
2691         mutex_lock(&file->mutex);
2692         list_add_tail(&uobj->list, &file->ucontext->ah_list);
2693         mutex_unlock(&file->mutex);
2694
2695         uobj->live = 1;
2696
2697         up_write(&uobj->mutex);
2698
2699         return in_len;
2700
2701 err_copy:
2702         idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
2703
2704 err_destroy:
2705         ib_destroy_ah(ah);
2706
2707 err_put:
2708         put_pd_read(pd);
2709
2710 err:
2711         put_uobj_write(uobj);
2712         return ret;
2713 }
2714
2715 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
2716                              const char __user *buf, int in_len, int out_len)
2717 {
2718         struct ib_uverbs_destroy_ah cmd;
2719         struct ib_ah               *ah;
2720         struct ib_uobject          *uobj;
2721         int                         ret;
2722
2723         if (copy_from_user(&cmd, buf, sizeof cmd))
2724                 return -EFAULT;
2725
2726         uobj = idr_write_uobj(&ib_uverbs_ah_idr, cmd.ah_handle, file->ucontext);
2727         if (!uobj)
2728                 return -EINVAL;
2729         ah = uobj->object;
2730
2731         ret = ib_destroy_ah(ah);
2732         if (!ret)
2733                 uobj->live = 0;
2734
2735         put_uobj_write(uobj);
2736
2737         if (ret)
2738                 return ret;
2739
2740         idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
2741
2742         mutex_lock(&file->mutex);
2743         list_del(&uobj->list);
2744         mutex_unlock(&file->mutex);
2745
2746         put_uobj(uobj);
2747
2748         return in_len;
2749 }
2750
2751 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
2752                                const char __user *buf, int in_len,
2753                                int out_len)
2754 {
2755         struct ib_uverbs_attach_mcast cmd;
2756         struct ib_qp                 *qp;
2757         struct ib_uqp_object         *obj;
2758         struct ib_uverbs_mcast_entry *mcast;
2759         int                           ret;
2760
2761         if (copy_from_user(&cmd, buf, sizeof cmd))
2762                 return -EFAULT;
2763
2764         qp = idr_write_qp(cmd.qp_handle, file->ucontext);
2765         if (!qp)
2766                 return -EINVAL;
2767
2768         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2769
2770         list_for_each_entry(mcast, &obj->mcast_list, list)
2771                 if (cmd.mlid == mcast->lid &&
2772                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2773                         ret = 0;
2774                         goto out_put;
2775                 }
2776
2777         mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
2778         if (!mcast) {
2779                 ret = -ENOMEM;
2780                 goto out_put;
2781         }
2782
2783         mcast->lid = cmd.mlid;
2784         memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
2785
2786         ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
2787         if (!ret)
2788                 list_add_tail(&mcast->list, &obj->mcast_list);
2789         else
2790                 kfree(mcast);
2791
2792 out_put:
2793         put_qp_write(qp);
2794
2795         return ret ? ret : in_len;
2796 }
2797
2798 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
2799                                const char __user *buf, int in_len,
2800                                int out_len)
2801 {
2802         struct ib_uverbs_detach_mcast cmd;
2803         struct ib_uqp_object         *obj;
2804         struct ib_qp                 *qp;
2805         struct ib_uverbs_mcast_entry *mcast;
2806         int                           ret = -EINVAL;
2807
2808         if (copy_from_user(&cmd, buf, sizeof cmd))
2809                 return -EFAULT;
2810
2811         qp = idr_write_qp(cmd.qp_handle, file->ucontext);
2812         if (!qp)
2813                 return -EINVAL;
2814
2815         ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
2816         if (ret)
2817                 goto out_put;
2818
2819         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2820
2821         list_for_each_entry(mcast, &obj->mcast_list, list)
2822                 if (cmd.mlid == mcast->lid &&
2823                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2824                         list_del(&mcast->list);
2825                         kfree(mcast);
2826                         break;
2827                 }
2828
2829 out_put:
2830         put_qp_write(qp);
2831
2832         return ret ? ret : in_len;
2833 }
2834
2835 static int kern_spec_to_ib_spec(struct ib_uverbs_flow_spec *kern_spec,
2836                                 union ib_flow_spec *ib_spec)
2837 {
2838         if (kern_spec->reserved)
2839                 return -EINVAL;
2840
2841         ib_spec->type = kern_spec->type;
2842
2843         switch (ib_spec->type) {
2844         case IB_FLOW_SPEC_ETH:
2845                 ib_spec->eth.size = sizeof(struct ib_flow_spec_eth);
2846                 if (ib_spec->eth.size != kern_spec->eth.size)
2847                         return -EINVAL;
2848                 memcpy(&ib_spec->eth.val, &kern_spec->eth.val,
2849                        sizeof(struct ib_flow_eth_filter));
2850                 memcpy(&ib_spec->eth.mask, &kern_spec->eth.mask,
2851                        sizeof(struct ib_flow_eth_filter));
2852                 break;
2853         case IB_FLOW_SPEC_IPV4:
2854                 ib_spec->ipv4.size = sizeof(struct ib_flow_spec_ipv4);
2855                 if (ib_spec->ipv4.size != kern_spec->ipv4.size)
2856                         return -EINVAL;
2857                 memcpy(&ib_spec->ipv4.val, &kern_spec->ipv4.val,
2858                        sizeof(struct ib_flow_ipv4_filter));
2859                 memcpy(&ib_spec->ipv4.mask, &kern_spec->ipv4.mask,
2860                        sizeof(struct ib_flow_ipv4_filter));
2861                 break;
2862         case IB_FLOW_SPEC_TCP:
2863         case IB_FLOW_SPEC_UDP:
2864                 ib_spec->tcp_udp.size = sizeof(struct ib_flow_spec_tcp_udp);
2865                 if (ib_spec->tcp_udp.size != kern_spec->tcp_udp.size)
2866                         return -EINVAL;
2867                 memcpy(&ib_spec->tcp_udp.val, &kern_spec->tcp_udp.val,
2868                        sizeof(struct ib_flow_tcp_udp_filter));
2869                 memcpy(&ib_spec->tcp_udp.mask, &kern_spec->tcp_udp.mask,
2870                        sizeof(struct ib_flow_tcp_udp_filter));
2871                 break;
2872         default:
2873                 return -EINVAL;
2874         }
2875         return 0;
2876 }
2877
2878 int ib_uverbs_ex_create_flow(struct ib_uverbs_file *file,
2879                              struct ib_udata *ucore,
2880                              struct ib_udata *uhw)
2881 {
2882         struct ib_uverbs_create_flow      cmd;
2883         struct ib_uverbs_create_flow_resp resp;
2884         struct ib_uobject                 *uobj;
2885         struct ib_flow                    *flow_id;
2886         struct ib_uverbs_flow_attr        *kern_flow_attr;
2887         struct ib_flow_attr               *flow_attr;
2888         struct ib_qp                      *qp;
2889         int err = 0;
2890         void *kern_spec;
2891         void *ib_spec;
2892         int i;
2893
2894         if (ucore->inlen < sizeof(cmd))
2895                 return -EINVAL;
2896
2897         if (ucore->outlen < sizeof(resp))
2898                 return -ENOSPC;
2899
2900         err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
2901         if (err)
2902                 return err;
2903
2904         ucore->inbuf += sizeof(cmd);
2905         ucore->inlen -= sizeof(cmd);
2906
2907         if (cmd.comp_mask)
2908                 return -EINVAL;
2909
2910         if ((cmd.flow_attr.type == IB_FLOW_ATTR_SNIFFER &&
2911              !capable(CAP_NET_ADMIN)) || !capable(CAP_NET_RAW))
2912                 return -EPERM;
2913
2914         if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS)
2915                 return -EINVAL;
2916
2917         if (cmd.flow_attr.size > ucore->inlen ||
2918             cmd.flow_attr.size >
2919             (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec)))
2920                 return -EINVAL;
2921
2922         if (cmd.flow_attr.reserved[0] ||
2923             cmd.flow_attr.reserved[1])
2924                 return -EINVAL;
2925
2926         if (cmd.flow_attr.num_of_specs) {
2927                 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size,
2928                                          GFP_KERNEL);
2929                 if (!kern_flow_attr)
2930                         return -ENOMEM;
2931
2932                 memcpy(kern_flow_attr, &cmd.flow_attr, sizeof(*kern_flow_attr));
2933                 err = ib_copy_from_udata(kern_flow_attr + 1, ucore,
2934                                          cmd.flow_attr.size);
2935                 if (err)
2936                         goto err_free_attr;
2937         } else {
2938                 kern_flow_attr = &cmd.flow_attr;
2939         }
2940
2941         uobj = kmalloc(sizeof(*uobj), GFP_KERNEL);
2942         if (!uobj) {
2943                 err = -ENOMEM;
2944                 goto err_free_attr;
2945         }
2946         init_uobj(uobj, 0, file->ucontext, &rule_lock_class);
2947         down_write(&uobj->mutex);
2948
2949         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2950         if (!qp) {
2951                 err = -EINVAL;
2952                 goto err_uobj;
2953         }
2954
2955         flow_attr = kmalloc(sizeof(*flow_attr) + cmd.flow_attr.size, GFP_KERNEL);
2956         if (!flow_attr) {
2957                 err = -ENOMEM;
2958                 goto err_put;
2959         }
2960
2961         flow_attr->type = kern_flow_attr->type;
2962         flow_attr->priority = kern_flow_attr->priority;
2963         flow_attr->num_of_specs = kern_flow_attr->num_of_specs;
2964         flow_attr->port = kern_flow_attr->port;
2965         flow_attr->flags = kern_flow_attr->flags;
2966         flow_attr->size = sizeof(*flow_attr);
2967
2968         kern_spec = kern_flow_attr + 1;
2969         ib_spec = flow_attr + 1;
2970         for (i = 0; i < flow_attr->num_of_specs &&
2971              cmd.flow_attr.size > offsetof(struct ib_uverbs_flow_spec, reserved) &&
2972              cmd.flow_attr.size >=
2973              ((struct ib_uverbs_flow_spec *)kern_spec)->size; i++) {
2974                 err = kern_spec_to_ib_spec(kern_spec, ib_spec);
2975                 if (err)
2976                         goto err_free;
2977                 flow_attr->size +=
2978                         ((union ib_flow_spec *) ib_spec)->size;
2979                 cmd.flow_attr.size -= ((struct ib_uverbs_flow_spec *)kern_spec)->size;
2980                 kern_spec += ((struct ib_uverbs_flow_spec *) kern_spec)->size;
2981                 ib_spec += ((union ib_flow_spec *) ib_spec)->size;
2982         }
2983         if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) {
2984                 pr_warn("create flow failed, flow %d: %d bytes left from uverb cmd\n",
2985                         i, cmd.flow_attr.size);
2986                 err = -EINVAL;
2987                 goto err_free;
2988         }
2989         flow_id = ib_create_flow(qp, flow_attr, IB_FLOW_DOMAIN_USER);
2990         if (IS_ERR(flow_id)) {
2991                 err = PTR_ERR(flow_id);
2992                 goto err_free;
2993         }
2994         flow_id->qp = qp;
2995         flow_id->uobject = uobj;
2996         uobj->object = flow_id;
2997
2998         err = idr_add_uobj(&ib_uverbs_rule_idr, uobj);
2999         if (err)
3000                 goto destroy_flow;
3001
3002         memset(&resp, 0, sizeof(resp));
3003         resp.flow_handle = uobj->id;
3004
3005         err = ib_copy_to_udata(ucore,
3006                                &resp, sizeof(resp));
3007         if (err)
3008                 goto err_copy;
3009
3010         put_qp_read(qp);
3011         mutex_lock(&file->mutex);
3012         list_add_tail(&uobj->list, &file->ucontext->rule_list);
3013         mutex_unlock(&file->mutex);
3014
3015         uobj->live = 1;
3016
3017         up_write(&uobj->mutex);
3018         kfree(flow_attr);
3019         if (cmd.flow_attr.num_of_specs)
3020                 kfree(kern_flow_attr);
3021         return 0;
3022 err_copy:
3023         idr_remove_uobj(&ib_uverbs_rule_idr, uobj);
3024 destroy_flow:
3025         ib_destroy_flow(flow_id);
3026 err_free:
3027         kfree(flow_attr);
3028 err_put:
3029         put_qp_read(qp);
3030 err_uobj:
3031         put_uobj_write(uobj);
3032 err_free_attr:
3033         if (cmd.flow_attr.num_of_specs)
3034                 kfree(kern_flow_attr);
3035         return err;
3036 }
3037
3038 int ib_uverbs_ex_destroy_flow(struct ib_uverbs_file *file,
3039                               struct ib_udata *ucore,
3040                               struct ib_udata *uhw)
3041 {
3042         struct ib_uverbs_destroy_flow   cmd;
3043         struct ib_flow                  *flow_id;
3044         struct ib_uobject               *uobj;
3045         int                             ret;
3046
3047         if (ucore->inlen < sizeof(cmd))
3048                 return -EINVAL;
3049
3050         ret = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3051         if (ret)
3052                 return ret;
3053
3054         if (cmd.comp_mask)
3055                 return -EINVAL;
3056
3057         uobj = idr_write_uobj(&ib_uverbs_rule_idr, cmd.flow_handle,
3058                               file->ucontext);
3059         if (!uobj)
3060                 return -EINVAL;
3061         flow_id = uobj->object;
3062
3063         ret = ib_destroy_flow(flow_id);
3064         if (!ret)
3065                 uobj->live = 0;
3066
3067         put_uobj_write(uobj);
3068
3069         idr_remove_uobj(&ib_uverbs_rule_idr, uobj);
3070
3071         mutex_lock(&file->mutex);
3072         list_del(&uobj->list);
3073         mutex_unlock(&file->mutex);
3074
3075         put_uobj(uobj);
3076
3077         return ret;
3078 }
3079
3080 static int __uverbs_create_xsrq(struct ib_uverbs_file *file,
3081                                 struct ib_uverbs_create_xsrq *cmd,
3082                                 struct ib_udata *udata)
3083 {
3084         struct ib_uverbs_create_srq_resp resp;
3085         struct ib_usrq_object           *obj;
3086         struct ib_pd                    *pd;
3087         struct ib_srq                   *srq;
3088         struct ib_uobject               *uninitialized_var(xrcd_uobj);
3089         struct ib_srq_init_attr          attr;
3090         int ret;
3091
3092         obj = kmalloc(sizeof *obj, GFP_KERNEL);
3093         if (!obj)
3094                 return -ENOMEM;
3095
3096         init_uobj(&obj->uevent.uobject, cmd->user_handle, file->ucontext, &srq_lock_class);
3097         down_write(&obj->uevent.uobject.mutex);
3098
3099         if (cmd->srq_type == IB_SRQT_XRC) {
3100                 attr.ext.xrc.xrcd  = idr_read_xrcd(cmd->xrcd_handle, file->ucontext, &xrcd_uobj);
3101                 if (!attr.ext.xrc.xrcd) {
3102                         ret = -EINVAL;
3103                         goto err;
3104                 }
3105
3106                 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
3107                 atomic_inc(&obj->uxrcd->refcnt);
3108
3109                 attr.ext.xrc.cq  = idr_read_cq(cmd->cq_handle, file->ucontext, 0);
3110                 if (!attr.ext.xrc.cq) {
3111                         ret = -EINVAL;
3112                         goto err_put_xrcd;
3113                 }
3114         }
3115
3116         pd  = idr_read_pd(cmd->pd_handle, file->ucontext);
3117         if (!pd) {
3118                 ret = -EINVAL;
3119                 goto err_put_cq;
3120         }
3121
3122         attr.event_handler  = ib_uverbs_srq_event_handler;
3123         attr.srq_context    = file;
3124         attr.srq_type       = cmd->srq_type;
3125         attr.attr.max_wr    = cmd->max_wr;
3126         attr.attr.max_sge   = cmd->max_sge;
3127         attr.attr.srq_limit = cmd->srq_limit;
3128
3129         obj->uevent.events_reported = 0;
3130         INIT_LIST_HEAD(&obj->uevent.event_list);
3131
3132         srq = pd->device->create_srq(pd, &attr, udata);
3133         if (IS_ERR(srq)) {
3134                 ret = PTR_ERR(srq);
3135                 goto err_put;
3136         }
3137
3138         srq->device        = pd->device;
3139         srq->pd            = pd;
3140         srq->srq_type      = cmd->srq_type;
3141         srq->uobject       = &obj->uevent.uobject;
3142         srq->event_handler = attr.event_handler;
3143         srq->srq_context   = attr.srq_context;
3144
3145         if (cmd->srq_type == IB_SRQT_XRC) {
3146                 srq->ext.xrc.cq   = attr.ext.xrc.cq;
3147                 srq->ext.xrc.xrcd = attr.ext.xrc.xrcd;
3148                 atomic_inc(&attr.ext.xrc.cq->usecnt);
3149                 atomic_inc(&attr.ext.xrc.xrcd->usecnt);
3150         }
3151
3152         atomic_inc(&pd->usecnt);
3153         atomic_set(&srq->usecnt, 0);
3154
3155         obj->uevent.uobject.object = srq;
3156         ret = idr_add_uobj(&ib_uverbs_srq_idr, &obj->uevent.uobject);
3157         if (ret)
3158                 goto err_destroy;
3159
3160         memset(&resp, 0, sizeof resp);
3161         resp.srq_handle = obj->uevent.uobject.id;
3162         resp.max_wr     = attr.attr.max_wr;
3163         resp.max_sge    = attr.attr.max_sge;
3164         if (cmd->srq_type == IB_SRQT_XRC)
3165                 resp.srqn = srq->ext.xrc.srq_num;
3166
3167         if (copy_to_user((void __user *) (unsigned long) cmd->response,
3168                          &resp, sizeof resp)) {
3169                 ret = -EFAULT;
3170                 goto err_copy;
3171         }
3172
3173         if (cmd->srq_type == IB_SRQT_XRC) {
3174                 put_uobj_read(xrcd_uobj);
3175                 put_cq_read(attr.ext.xrc.cq);
3176         }
3177         put_pd_read(pd);
3178
3179         mutex_lock(&file->mutex);
3180         list_add_tail(&obj->uevent.uobject.list, &file->ucontext->srq_list);
3181         mutex_unlock(&file->mutex);
3182
3183         obj->uevent.uobject.live = 1;
3184
3185         up_write(&obj->uevent.uobject.mutex);
3186
3187         return 0;
3188
3189 err_copy:
3190         idr_remove_uobj(&ib_uverbs_srq_idr, &obj->uevent.uobject);
3191
3192 err_destroy:
3193         ib_destroy_srq(srq);
3194
3195 err_put:
3196         put_pd_read(pd);
3197
3198 err_put_cq:
3199         if (cmd->srq_type == IB_SRQT_XRC)
3200                 put_cq_read(attr.ext.xrc.cq);
3201
3202 err_put_xrcd:
3203         if (cmd->srq_type == IB_SRQT_XRC) {
3204                 atomic_dec(&obj->uxrcd->refcnt);
3205                 put_uobj_read(xrcd_uobj);
3206         }
3207
3208 err:
3209         put_uobj_write(&obj->uevent.uobject);
3210         return ret;
3211 }
3212
3213 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
3214                              const char __user *buf, int in_len,
3215                              int out_len)
3216 {
3217         struct ib_uverbs_create_srq      cmd;
3218         struct ib_uverbs_create_xsrq     xcmd;
3219         struct ib_uverbs_create_srq_resp resp;
3220         struct ib_udata                  udata;
3221         int ret;
3222
3223         if (out_len < sizeof resp)
3224                 return -ENOSPC;
3225
3226         if (copy_from_user(&cmd, buf, sizeof cmd))
3227                 return -EFAULT;
3228
3229         xcmd.response    = cmd.response;
3230         xcmd.user_handle = cmd.user_handle;
3231         xcmd.srq_type    = IB_SRQT_BASIC;
3232         xcmd.pd_handle   = cmd.pd_handle;
3233         xcmd.max_wr      = cmd.max_wr;
3234         xcmd.max_sge     = cmd.max_sge;
3235         xcmd.srq_limit   = cmd.srq_limit;
3236
3237         INIT_UDATA(&udata, buf + sizeof cmd,
3238                    (unsigned long) cmd.response + sizeof resp,
3239                    in_len - sizeof cmd, out_len - sizeof resp);
3240
3241         ret = __uverbs_create_xsrq(file, &xcmd, &udata);
3242         if (ret)
3243                 return ret;
3244
3245         return in_len;
3246 }
3247
3248 ssize_t ib_uverbs_create_xsrq(struct ib_uverbs_file *file,
3249                               const char __user *buf, int in_len, int out_len)
3250 {
3251         struct ib_uverbs_create_xsrq     cmd;
3252         struct ib_uverbs_create_srq_resp resp;
3253         struct ib_udata                  udata;
3254         int ret;
3255
3256         if (out_len < sizeof resp)
3257                 return -ENOSPC;
3258
3259         if (copy_from_user(&cmd, buf, sizeof cmd))
3260                 return -EFAULT;
3261
3262         INIT_UDATA(&udata, buf + sizeof cmd,
3263                    (unsigned long) cmd.response + sizeof resp,
3264                    in_len - sizeof cmd, out_len - sizeof resp);
3265
3266         ret = __uverbs_create_xsrq(file, &cmd, &udata);
3267         if (ret)
3268                 return ret;
3269
3270         return in_len;
3271 }
3272
3273 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
3274                              const char __user *buf, int in_len,
3275                              int out_len)
3276 {
3277         struct ib_uverbs_modify_srq cmd;
3278         struct ib_udata             udata;
3279         struct ib_srq              *srq;
3280         struct ib_srq_attr          attr;
3281         int                         ret;
3282
3283         if (copy_from_user(&cmd, buf, sizeof cmd))
3284                 return -EFAULT;
3285
3286         INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
3287                    out_len);
3288
3289         srq = idr_read_srq(cmd.srq_handle, file->ucontext);
3290         if (!srq)
3291                 return -EINVAL;
3292
3293         attr.max_wr    = cmd.max_wr;
3294         attr.srq_limit = cmd.srq_limit;
3295
3296         ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata);
3297
3298         put_srq_read(srq);
3299
3300         return ret ? ret : in_len;
3301 }
3302
3303 ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
3304                             const char __user *buf,
3305                             int in_len, int out_len)
3306 {
3307         struct ib_uverbs_query_srq      cmd;
3308         struct ib_uverbs_query_srq_resp resp;
3309         struct ib_srq_attr              attr;
3310         struct ib_srq                   *srq;
3311         int                             ret;
3312
3313         if (out_len < sizeof resp)
3314                 return -ENOSPC;
3315
3316         if (copy_from_user(&cmd, buf, sizeof cmd))
3317                 return -EFAULT;
3318
3319         srq = idr_read_srq(cmd.srq_handle, file->ucontext);
3320         if (!srq)
3321                 return -EINVAL;
3322
3323         ret = ib_query_srq(srq, &attr);
3324
3325         put_srq_read(srq);
3326
3327         if (ret)
3328                 return ret;
3329
3330         memset(&resp, 0, sizeof resp);
3331
3332         resp.max_wr    = attr.max_wr;
3333         resp.max_sge   = attr.max_sge;
3334         resp.srq_limit = attr.srq_limit;
3335
3336         if (copy_to_user((void __user *) (unsigned long) cmd.response,
3337                          &resp, sizeof resp))
3338                 return -EFAULT;
3339
3340         return in_len;
3341 }
3342
3343 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
3344                               const char __user *buf, int in_len,
3345                               int out_len)
3346 {
3347         struct ib_uverbs_destroy_srq      cmd;
3348         struct ib_uverbs_destroy_srq_resp resp;
3349         struct ib_uobject                *uobj;
3350         struct ib_srq                    *srq;
3351         struct ib_uevent_object          *obj;
3352         int                               ret = -EINVAL;
3353         struct ib_usrq_object            *us;
3354         enum ib_srq_type                  srq_type;
3355
3356         if (copy_from_user(&cmd, buf, sizeof cmd))
3357                 return -EFAULT;
3358
3359         uobj = idr_write_uobj(&ib_uverbs_srq_idr, cmd.srq_handle, file->ucontext);
3360         if (!uobj)
3361                 return -EINVAL;
3362         srq = uobj->object;
3363         obj = container_of(uobj, struct ib_uevent_object, uobject);
3364         srq_type = srq->srq_type;
3365
3366         ret = ib_destroy_srq(srq);
3367         if (!ret)
3368                 uobj->live = 0;
3369
3370         put_uobj_write(uobj);
3371
3372         if (ret)
3373                 return ret;
3374
3375         if (srq_type == IB_SRQT_XRC) {
3376                 us = container_of(obj, struct ib_usrq_object, uevent);
3377                 atomic_dec(&us->uxrcd->refcnt);
3378         }
3379
3380         idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
3381
3382         mutex_lock(&file->mutex);
3383         list_del(&uobj->list);
3384         mutex_unlock(&file->mutex);
3385
3386         ib_uverbs_release_uevent(file, obj);
3387
3388         memset(&resp, 0, sizeof resp);
3389         resp.events_reported = obj->events_reported;
3390
3391         put_uobj(uobj);
3392
3393         if (copy_to_user((void __user *) (unsigned long) cmd.response,
3394                          &resp, sizeof resp))
3395                 ret = -EFAULT;
3396
3397         return ret ? ret : in_len;
3398 }
3399
3400 int ib_uverbs_ex_query_device(struct ib_uverbs_file *file,
3401                               struct ib_udata *ucore,
3402                               struct ib_udata *uhw)
3403 {
3404         struct ib_uverbs_ex_query_device_resp resp;
3405         struct ib_uverbs_ex_query_device  cmd;
3406         struct ib_device_attr attr;
3407         struct ib_device *device;
3408         int err;
3409
3410         device = file->device->ib_dev;
3411         if (ucore->inlen < sizeof(cmd))
3412                 return -EINVAL;
3413
3414         err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3415         if (err)
3416                 return err;
3417
3418         if (cmd.comp_mask)
3419                 return -EINVAL;
3420
3421         if (cmd.reserved)
3422                 return -EINVAL;
3423
3424         resp.response_length = offsetof(typeof(resp), odp_caps);
3425
3426         if (ucore->outlen < resp.response_length)
3427                 return -ENOSPC;
3428
3429         memset(&attr, 0, sizeof(attr));
3430
3431         err = device->query_device(device, &attr, uhw);
3432         if (err)
3433                 return err;
3434
3435         copy_query_dev_fields(file, &resp.base, &attr);
3436         resp.comp_mask = 0;
3437
3438         if (ucore->outlen < resp.response_length + sizeof(resp.odp_caps))
3439                 goto end;
3440
3441 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
3442         resp.odp_caps.general_caps = attr.odp_caps.general_caps;
3443         resp.odp_caps.per_transport_caps.rc_odp_caps =
3444                 attr.odp_caps.per_transport_caps.rc_odp_caps;
3445         resp.odp_caps.per_transport_caps.uc_odp_caps =
3446                 attr.odp_caps.per_transport_caps.uc_odp_caps;
3447         resp.odp_caps.per_transport_caps.ud_odp_caps =
3448                 attr.odp_caps.per_transport_caps.ud_odp_caps;
3449         resp.odp_caps.reserved = 0;
3450 #else
3451         memset(&resp.odp_caps, 0, sizeof(resp.odp_caps));
3452 #endif
3453         resp.response_length += sizeof(resp.odp_caps);
3454
3455         if (ucore->outlen < resp.response_length + sizeof(resp.timestamp_mask))
3456                 goto end;
3457
3458         resp.timestamp_mask = attr.timestamp_mask;
3459         resp.response_length += sizeof(resp.timestamp_mask);
3460
3461         if (ucore->outlen < resp.response_length + sizeof(resp.hca_core_clock))
3462                 goto end;
3463
3464         resp.hca_core_clock = attr.hca_core_clock;
3465         resp.response_length += sizeof(resp.hca_core_clock);
3466
3467 end:
3468         err = ib_copy_to_udata(ucore, &resp, resp.response_length);
3469         if (err)
3470                 return err;
3471
3472         return 0;
3473 }