kernel/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 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
1334                             const char __user *buf, int in_len,
1335                             int out_len)
1336 {
1337         struct ib_uverbs_create_cq      cmd;
1338         struct ib_uverbs_create_cq_resp resp;
1339         struct ib_udata                 udata;
1340         struct ib_ucq_object           *obj;
1341         struct ib_uverbs_event_file    *ev_file = NULL;
1342         struct ib_cq                   *cq;
1343         int                             ret;
1344
1345         if (out_len < sizeof resp)
1346                 return -ENOSPC;
1347
1348         if (copy_from_user(&cmd, buf, sizeof cmd))
1349                 return -EFAULT;
1350
1351         INIT_UDATA(&udata, buf + sizeof cmd,
1352                    (unsigned long) cmd.response + sizeof resp,
1353                    in_len - sizeof cmd, out_len - sizeof resp);
1354
1355         if (cmd.comp_vector >= file->device->num_comp_vectors)
1356                 return -EINVAL;
1357
1358         obj = kmalloc(sizeof *obj, GFP_KERNEL);
1359         if (!obj)
1360                 return -ENOMEM;
1361
1362         init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &cq_lock_class);
1363         down_write(&obj->uobject.mutex);
1364
1365         if (cmd.comp_channel >= 0) {
1366                 ev_file = ib_uverbs_lookup_comp_file(cmd.comp_channel);
1367                 if (!ev_file) {
1368                         ret = -EINVAL;
1369                         goto err;
1370                 }
1371         }
1372
1373         obj->uverbs_file           = file;
1374         obj->comp_events_reported  = 0;
1375         obj->async_events_reported = 0;
1376         INIT_LIST_HEAD(&obj->comp_list);
1377         INIT_LIST_HEAD(&obj->async_list);
1378
1379         cq = file->device->ib_dev->create_cq(file->device->ib_dev, cmd.cqe,
1380                                              cmd.comp_vector,
1381                                              file->ucontext, &udata);
1382         if (IS_ERR(cq)) {
1383                 ret = PTR_ERR(cq);
1384                 goto err_file;
1385         }
1386
1387         cq->device        = file->device->ib_dev;
1388         cq->uobject       = &obj->uobject;
1389         cq->comp_handler  = ib_uverbs_comp_handler;
1390         cq->event_handler = ib_uverbs_cq_event_handler;
1391         cq->cq_context    = ev_file;
1392         atomic_set(&cq->usecnt, 0);
1393
1394         obj->uobject.object = cq;
1395         ret = idr_add_uobj(&ib_uverbs_cq_idr, &obj->uobject);
1396         if (ret)
1397                 goto err_free;
1398
1399         memset(&resp, 0, sizeof resp);
1400         resp.cq_handle = obj->uobject.id;
1401         resp.cqe       = cq->cqe;
1402
1403         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1404                          &resp, sizeof resp)) {
1405                 ret = -EFAULT;
1406                 goto err_copy;
1407         }
1408
1409         mutex_lock(&file->mutex);
1410         list_add_tail(&obj->uobject.list, &file->ucontext->cq_list);
1411         mutex_unlock(&file->mutex);
1412
1413         obj->uobject.live = 1;
1414
1415         up_write(&obj->uobject.mutex);
1416
1417         return in_len;
1418
1419 err_copy:
1420         idr_remove_uobj(&ib_uverbs_cq_idr, &obj->uobject);
1421
1422 err_free:
1423         ib_destroy_cq(cq);
1424
1425 err_file:
1426         if (ev_file)
1427                 ib_uverbs_release_ucq(file, ev_file, obj);
1428
1429 err:
1430         put_uobj_write(&obj->uobject);
1431         return ret;
1432 }
1433
1434 ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
1435                             const char __user *buf, int in_len,
1436                             int out_len)
1437 {
1438         struct ib_uverbs_resize_cq      cmd;
1439         struct ib_uverbs_resize_cq_resp resp;
1440         struct ib_udata                 udata;
1441         struct ib_cq                    *cq;
1442         int                             ret = -EINVAL;
1443
1444         if (copy_from_user(&cmd, buf, sizeof cmd))
1445                 return -EFAULT;
1446
1447         INIT_UDATA(&udata, buf + sizeof cmd,
1448                    (unsigned long) cmd.response + sizeof resp,
1449                    in_len - sizeof cmd, out_len - sizeof resp);
1450
1451         cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1452         if (!cq)
1453                 return -EINVAL;
1454
1455         ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
1456         if (ret)
1457                 goto out;
1458
1459         resp.cqe = cq->cqe;
1460
1461         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1462                          &resp, sizeof resp.cqe))
1463                 ret = -EFAULT;
1464
1465 out:
1466         put_cq_read(cq);
1467
1468         return ret ? ret : in_len;
1469 }
1470
1471 static int copy_wc_to_user(void __user *dest, struct ib_wc *wc)
1472 {
1473         struct ib_uverbs_wc tmp;
1474
1475         tmp.wr_id               = wc->wr_id;
1476         tmp.status              = wc->status;
1477         tmp.opcode              = wc->opcode;
1478         tmp.vendor_err          = wc->vendor_err;
1479         tmp.byte_len            = wc->byte_len;
1480         tmp.ex.imm_data         = (__u32 __force) wc->ex.imm_data;
1481         tmp.qp_num              = wc->qp->qp_num;
1482         tmp.src_qp              = wc->src_qp;
1483         tmp.wc_flags            = wc->wc_flags;
1484         tmp.pkey_index          = wc->pkey_index;
1485         tmp.slid                = wc->slid;
1486         tmp.sl                  = wc->sl;
1487         tmp.dlid_path_bits      = wc->dlid_path_bits;
1488         tmp.port_num            = wc->port_num;
1489         tmp.reserved            = 0;
1490
1491         if (copy_to_user(dest, &tmp, sizeof tmp))
1492                 return -EFAULT;
1493
1494         return 0;
1495 }
1496
1497 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
1498                           const char __user *buf, int in_len,
1499                           int out_len)
1500 {
1501         struct ib_uverbs_poll_cq       cmd;
1502         struct ib_uverbs_poll_cq_resp  resp;
1503         u8 __user                     *header_ptr;
1504         u8 __user                     *data_ptr;
1505         struct ib_cq                  *cq;
1506         struct ib_wc                   wc;
1507         int                            ret;
1508
1509         if (copy_from_user(&cmd, buf, sizeof cmd))
1510                 return -EFAULT;
1511
1512         cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1513         if (!cq)
1514                 return -EINVAL;
1515
1516         /* we copy a struct ib_uverbs_poll_cq_resp to user space */
1517         header_ptr = (void __user *)(unsigned long) cmd.response;
1518         data_ptr = header_ptr + sizeof resp;
1519
1520         memset(&resp, 0, sizeof resp);
1521         while (resp.count < cmd.ne) {
1522                 ret = ib_poll_cq(cq, 1, &wc);
1523                 if (ret < 0)
1524                         goto out_put;
1525                 if (!ret)
1526                         break;
1527
1528                 ret = copy_wc_to_user(data_ptr, &wc);
1529                 if (ret)
1530                         goto out_put;
1531
1532                 data_ptr += sizeof(struct ib_uverbs_wc);
1533                 ++resp.count;
1534         }
1535
1536         if (copy_to_user(header_ptr, &resp, sizeof resp)) {
1537                 ret = -EFAULT;
1538                 goto out_put;
1539         }
1540
1541         ret = in_len;
1542
1543 out_put:
1544         put_cq_read(cq);
1545         return ret;
1546 }
1547
1548 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
1549                                 const char __user *buf, int in_len,
1550                                 int out_len)
1551 {
1552         struct ib_uverbs_req_notify_cq cmd;
1553         struct ib_cq                  *cq;
1554
1555         if (copy_from_user(&cmd, buf, sizeof cmd))
1556                 return -EFAULT;
1557
1558         cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1559         if (!cq)
1560                 return -EINVAL;
1561
1562         ib_req_notify_cq(cq, cmd.solicited_only ?
1563                          IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
1564
1565         put_cq_read(cq);
1566
1567         return in_len;
1568 }
1569
1570 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
1571                              const char __user *buf, int in_len,
1572                              int out_len)
1573 {
1574         struct ib_uverbs_destroy_cq      cmd;
1575         struct ib_uverbs_destroy_cq_resp resp;
1576         struct ib_uobject               *uobj;
1577         struct ib_cq                    *cq;
1578         struct ib_ucq_object            *obj;
1579         struct ib_uverbs_event_file     *ev_file;
1580         int                              ret = -EINVAL;
1581
1582         if (copy_from_user(&cmd, buf, sizeof cmd))
1583                 return -EFAULT;
1584
1585         uobj = idr_write_uobj(&ib_uverbs_cq_idr, cmd.cq_handle, file->ucontext);
1586         if (!uobj)
1587                 return -EINVAL;
1588         cq      = uobj->object;
1589         ev_file = cq->cq_context;
1590         obj     = container_of(cq->uobject, struct ib_ucq_object, uobject);
1591
1592         ret = ib_destroy_cq(cq);
1593         if (!ret)
1594                 uobj->live = 0;
1595
1596         put_uobj_write(uobj);
1597
1598         if (ret)
1599                 return ret;
1600
1601         idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
1602
1603         mutex_lock(&file->mutex);
1604         list_del(&uobj->list);
1605         mutex_unlock(&file->mutex);
1606
1607         ib_uverbs_release_ucq(file, ev_file, obj);
1608
1609         memset(&resp, 0, sizeof resp);
1610         resp.comp_events_reported  = obj->comp_events_reported;
1611         resp.async_events_reported = obj->async_events_reported;
1612
1613         put_uobj(uobj);
1614
1615         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1616                          &resp, sizeof resp))
1617                 return -EFAULT;
1618
1619         return in_len;
1620 }
1621
1622 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1623                             const char __user *buf, int in_len,
1624                             int out_len)
1625 {
1626         struct ib_uverbs_create_qp      cmd;
1627         struct ib_uverbs_create_qp_resp resp;
1628         struct ib_udata                 udata;
1629         struct ib_uqp_object           *obj;
1630         struct ib_device               *device;
1631         struct ib_pd                   *pd = NULL;
1632         struct ib_xrcd                 *xrcd = NULL;
1633         struct ib_uobject              *uninitialized_var(xrcd_uobj);
1634         struct ib_cq                   *scq = NULL, *rcq = NULL;
1635         struct ib_srq                  *srq = NULL;
1636         struct ib_qp                   *qp;
1637         struct ib_qp_init_attr          attr;
1638         int ret;
1639
1640         if (out_len < sizeof resp)
1641                 return -ENOSPC;
1642
1643         if (copy_from_user(&cmd, buf, sizeof cmd))
1644                 return -EFAULT;
1645
1646         if (cmd.qp_type == IB_QPT_RAW_PACKET && !capable(CAP_NET_RAW))
1647                 return -EPERM;
1648
1649         INIT_UDATA(&udata, buf + sizeof cmd,
1650                    (unsigned long) cmd.response + sizeof resp,
1651                    in_len - sizeof cmd, out_len - sizeof resp);
1652
1653         obj = kzalloc(sizeof *obj, GFP_KERNEL);
1654         if (!obj)
1655                 return -ENOMEM;
1656
1657         init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_class);
1658         down_write(&obj->uevent.uobject.mutex);
1659
1660         if (cmd.qp_type == IB_QPT_XRC_TGT) {
1661                 xrcd = idr_read_xrcd(cmd.pd_handle, file->ucontext, &xrcd_uobj);
1662                 if (!xrcd) {
1663                         ret = -EINVAL;
1664                         goto err_put;
1665                 }
1666                 device = xrcd->device;
1667         } else {
1668                 if (cmd.qp_type == IB_QPT_XRC_INI) {
1669                         cmd.max_recv_wr = cmd.max_recv_sge = 0;
1670                 } else {
1671                         if (cmd.is_srq) {
1672                                 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
1673                                 if (!srq || srq->srq_type != IB_SRQT_BASIC) {
1674                                         ret = -EINVAL;
1675                                         goto err_put;
1676                                 }
1677                         }
1678
1679                         if (cmd.recv_cq_handle != cmd.send_cq_handle) {
1680                                 rcq = idr_read_cq(cmd.recv_cq_handle, file->ucontext, 0);
1681                                 if (!rcq) {
1682                                         ret = -EINVAL;
1683                                         goto err_put;
1684                                 }
1685                         }
1686                 }
1687
1688                 scq = idr_read_cq(cmd.send_cq_handle, file->ucontext, !!rcq);
1689                 rcq = rcq ?: scq;
1690                 pd  = idr_read_pd(cmd.pd_handle, file->ucontext);
1691                 if (!pd || !scq) {
1692                         ret = -EINVAL;
1693                         goto err_put;
1694                 }
1695
1696                 device = pd->device;
1697         }
1698
1699         attr.event_handler = ib_uverbs_qp_event_handler;
1700         attr.qp_context    = file;
1701         attr.send_cq       = scq;
1702         attr.recv_cq       = rcq;
1703         attr.srq           = srq;
1704         attr.xrcd          = xrcd;
1705         attr.sq_sig_type   = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
1706         attr.qp_type       = cmd.qp_type;
1707         attr.create_flags  = 0;
1708
1709         attr.cap.max_send_wr     = cmd.max_send_wr;
1710         attr.cap.max_recv_wr     = cmd.max_recv_wr;
1711         attr.cap.max_send_sge    = cmd.max_send_sge;
1712         attr.cap.max_recv_sge    = cmd.max_recv_sge;
1713         attr.cap.max_inline_data = cmd.max_inline_data;
1714
1715         obj->uevent.events_reported     = 0;
1716         INIT_LIST_HEAD(&obj->uevent.event_list);
1717         INIT_LIST_HEAD(&obj->mcast_list);
1718
1719         if (cmd.qp_type == IB_QPT_XRC_TGT)
1720                 qp = ib_create_qp(pd, &attr);
1721         else
1722                 qp = device->create_qp(pd, &attr, &udata);
1723
1724         if (IS_ERR(qp)) {
1725                 ret = PTR_ERR(qp);
1726                 goto err_put;
1727         }
1728
1729         if (cmd.qp_type != IB_QPT_XRC_TGT) {
1730                 qp->real_qp       = qp;
1731                 qp->device        = device;
1732                 qp->pd            = pd;
1733                 qp->send_cq       = attr.send_cq;
1734                 qp->recv_cq       = attr.recv_cq;
1735                 qp->srq           = attr.srq;
1736                 qp->event_handler = attr.event_handler;
1737                 qp->qp_context    = attr.qp_context;
1738                 qp->qp_type       = attr.qp_type;
1739                 atomic_set(&qp->usecnt, 0);
1740                 atomic_inc(&pd->usecnt);
1741                 atomic_inc(&attr.send_cq->usecnt);
1742                 if (attr.recv_cq)
1743                         atomic_inc(&attr.recv_cq->usecnt);
1744                 if (attr.srq)
1745                         atomic_inc(&attr.srq->usecnt);
1746         }
1747         qp->uobject = &obj->uevent.uobject;
1748
1749         obj->uevent.uobject.object = qp;
1750         ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1751         if (ret)
1752                 goto err_destroy;
1753
1754         memset(&resp, 0, sizeof resp);
1755         resp.qpn             = qp->qp_num;
1756         resp.qp_handle       = obj->uevent.uobject.id;
1757         resp.max_recv_sge    = attr.cap.max_recv_sge;
1758         resp.max_send_sge    = attr.cap.max_send_sge;
1759         resp.max_recv_wr     = attr.cap.max_recv_wr;
1760         resp.max_send_wr     = attr.cap.max_send_wr;
1761         resp.max_inline_data = attr.cap.max_inline_data;
1762
1763         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1764                          &resp, sizeof resp)) {
1765                 ret = -EFAULT;
1766                 goto err_copy;
1767         }
1768
1769         if (xrcd) {
1770                 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object,
1771                                           uobject);
1772                 atomic_inc(&obj->uxrcd->refcnt);
1773                 put_xrcd_read(xrcd_uobj);
1774         }
1775
1776         if (pd)
1777                 put_pd_read(pd);
1778         if (scq)
1779                 put_cq_read(scq);
1780         if (rcq && rcq != scq)
1781                 put_cq_read(rcq);
1782         if (srq)
1783                 put_srq_read(srq);
1784
1785         mutex_lock(&file->mutex);
1786         list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1787         mutex_unlock(&file->mutex);
1788
1789         obj->uevent.uobject.live = 1;
1790
1791         up_write(&obj->uevent.uobject.mutex);
1792
1793         return in_len;
1794
1795 err_copy:
1796         idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1797
1798 err_destroy:
1799         ib_destroy_qp(qp);
1800
1801 err_put:
1802         if (xrcd)
1803                 put_xrcd_read(xrcd_uobj);
1804         if (pd)
1805                 put_pd_read(pd);
1806         if (scq)
1807                 put_cq_read(scq);
1808         if (rcq && rcq != scq)
1809                 put_cq_read(rcq);
1810         if (srq)
1811                 put_srq_read(srq);
1812
1813         put_uobj_write(&obj->uevent.uobject);
1814         return ret;
1815 }
1816
1817 ssize_t ib_uverbs_open_qp(struct ib_uverbs_file *file,
1818                           const char __user *buf, int in_len, int out_len)
1819 {
1820         struct ib_uverbs_open_qp        cmd;
1821         struct ib_uverbs_create_qp_resp resp;
1822         struct ib_udata                 udata;
1823         struct ib_uqp_object           *obj;
1824         struct ib_xrcd                 *xrcd;
1825         struct ib_uobject              *uninitialized_var(xrcd_uobj);
1826         struct ib_qp                   *qp;
1827         struct ib_qp_open_attr          attr;
1828         int ret;
1829
1830         if (out_len < sizeof resp)
1831                 return -ENOSPC;
1832
1833         if (copy_from_user(&cmd, buf, sizeof cmd))
1834                 return -EFAULT;
1835
1836         INIT_UDATA(&udata, buf + sizeof cmd,
1837                    (unsigned long) cmd.response + sizeof resp,
1838                    in_len - sizeof cmd, out_len - sizeof resp);
1839
1840         obj = kmalloc(sizeof *obj, GFP_KERNEL);
1841         if (!obj)
1842                 return -ENOMEM;
1843
1844         init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_class);
1845         down_write(&obj->uevent.uobject.mutex);
1846
1847         xrcd = idr_read_xrcd(cmd.pd_handle, file->ucontext, &xrcd_uobj);
1848         if (!xrcd) {
1849                 ret = -EINVAL;
1850                 goto err_put;
1851         }
1852
1853         attr.event_handler = ib_uverbs_qp_event_handler;
1854         attr.qp_context    = file;
1855         attr.qp_num        = cmd.qpn;
1856         attr.qp_type       = cmd.qp_type;
1857
1858         obj->uevent.events_reported = 0;
1859         INIT_LIST_HEAD(&obj->uevent.event_list);
1860         INIT_LIST_HEAD(&obj->mcast_list);
1861
1862         qp = ib_open_qp(xrcd, &attr);
1863         if (IS_ERR(qp)) {
1864                 ret = PTR_ERR(qp);
1865                 goto err_put;
1866         }
1867
1868         qp->uobject = &obj->uevent.uobject;
1869
1870         obj->uevent.uobject.object = qp;
1871         ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1872         if (ret)
1873                 goto err_destroy;
1874
1875         memset(&resp, 0, sizeof resp);
1876         resp.qpn       = qp->qp_num;
1877         resp.qp_handle = obj->uevent.uobject.id;
1878
1879         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1880                          &resp, sizeof resp)) {
1881                 ret = -EFAULT;
1882                 goto err_remove;
1883         }
1884
1885         obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
1886         atomic_inc(&obj->uxrcd->refcnt);
1887         put_xrcd_read(xrcd_uobj);
1888
1889         mutex_lock(&file->mutex);
1890         list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1891         mutex_unlock(&file->mutex);
1892
1893         obj->uevent.uobject.live = 1;
1894
1895         up_write(&obj->uevent.uobject.mutex);
1896
1897         return in_len;
1898
1899 err_remove:
1900         idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1901
1902 err_destroy:
1903         ib_destroy_qp(qp);
1904
1905 err_put:
1906         put_xrcd_read(xrcd_uobj);
1907         put_uobj_write(&obj->uevent.uobject);
1908         return ret;
1909 }
1910
1911 ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
1912                            const char __user *buf, int in_len,
1913                            int out_len)
1914 {
1915         struct ib_uverbs_query_qp      cmd;
1916         struct ib_uverbs_query_qp_resp resp;
1917         struct ib_qp                   *qp;
1918         struct ib_qp_attr              *attr;
1919         struct ib_qp_init_attr         *init_attr;
1920         int                            ret;
1921
1922         if (copy_from_user(&cmd, buf, sizeof cmd))
1923                 return -EFAULT;
1924
1925         attr      = kmalloc(sizeof *attr, GFP_KERNEL);
1926         init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1927         if (!attr || !init_attr) {
1928                 ret = -ENOMEM;
1929                 goto out;
1930         }
1931
1932         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1933         if (!qp) {
1934                 ret = -EINVAL;
1935                 goto out;
1936         }
1937
1938         ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1939
1940         put_qp_read(qp);
1941
1942         if (ret)
1943                 goto out;
1944
1945         memset(&resp, 0, sizeof resp);
1946
1947         resp.qp_state               = attr->qp_state;
1948         resp.cur_qp_state           = attr->cur_qp_state;
1949         resp.path_mtu               = attr->path_mtu;
1950         resp.path_mig_state         = attr->path_mig_state;
1951         resp.qkey                   = attr->qkey;
1952         resp.rq_psn                 = attr->rq_psn;
1953         resp.sq_psn                 = attr->sq_psn;
1954         resp.dest_qp_num            = attr->dest_qp_num;
1955         resp.qp_access_flags        = attr->qp_access_flags;
1956         resp.pkey_index             = attr->pkey_index;
1957         resp.alt_pkey_index         = attr->alt_pkey_index;
1958         resp.sq_draining            = attr->sq_draining;
1959         resp.max_rd_atomic          = attr->max_rd_atomic;
1960         resp.max_dest_rd_atomic     = attr->max_dest_rd_atomic;
1961         resp.min_rnr_timer          = attr->min_rnr_timer;
1962         resp.port_num               = attr->port_num;
1963         resp.timeout                = attr->timeout;
1964         resp.retry_cnt              = attr->retry_cnt;
1965         resp.rnr_retry              = attr->rnr_retry;
1966         resp.alt_port_num           = attr->alt_port_num;
1967         resp.alt_timeout            = attr->alt_timeout;
1968
1969         memcpy(resp.dest.dgid, attr->ah_attr.grh.dgid.raw, 16);
1970         resp.dest.flow_label        = attr->ah_attr.grh.flow_label;
1971         resp.dest.sgid_index        = attr->ah_attr.grh.sgid_index;
1972         resp.dest.hop_limit         = attr->ah_attr.grh.hop_limit;
1973         resp.dest.traffic_class     = attr->ah_attr.grh.traffic_class;
1974         resp.dest.dlid              = attr->ah_attr.dlid;
1975         resp.dest.sl                = attr->ah_attr.sl;
1976         resp.dest.src_path_bits     = attr->ah_attr.src_path_bits;
1977         resp.dest.static_rate       = attr->ah_attr.static_rate;
1978         resp.dest.is_global         = !!(attr->ah_attr.ah_flags & IB_AH_GRH);
1979         resp.dest.port_num          = attr->ah_attr.port_num;
1980
1981         memcpy(resp.alt_dest.dgid, attr->alt_ah_attr.grh.dgid.raw, 16);
1982         resp.alt_dest.flow_label    = attr->alt_ah_attr.grh.flow_label;
1983         resp.alt_dest.sgid_index    = attr->alt_ah_attr.grh.sgid_index;
1984         resp.alt_dest.hop_limit     = attr->alt_ah_attr.grh.hop_limit;
1985         resp.alt_dest.traffic_class = attr->alt_ah_attr.grh.traffic_class;
1986         resp.alt_dest.dlid          = attr->alt_ah_attr.dlid;
1987         resp.alt_dest.sl            = attr->alt_ah_attr.sl;
1988         resp.alt_dest.src_path_bits = attr->alt_ah_attr.src_path_bits;
1989         resp.alt_dest.static_rate   = attr->alt_ah_attr.static_rate;
1990         resp.alt_dest.is_global     = !!(attr->alt_ah_attr.ah_flags & IB_AH_GRH);
1991         resp.alt_dest.port_num      = attr->alt_ah_attr.port_num;
1992
1993         resp.max_send_wr            = init_attr->cap.max_send_wr;
1994         resp.max_recv_wr            = init_attr->cap.max_recv_wr;
1995         resp.max_send_sge           = init_attr->cap.max_send_sge;
1996         resp.max_recv_sge           = init_attr->cap.max_recv_sge;
1997         resp.max_inline_data        = init_attr->cap.max_inline_data;
1998         resp.sq_sig_all             = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1999
2000         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2001                          &resp, sizeof resp))
2002                 ret = -EFAULT;
2003
2004 out:
2005         kfree(attr);
2006         kfree(init_attr);
2007
2008         return ret ? ret : in_len;
2009 }
2010
2011 /* Remove ignored fields set in the attribute mask */
2012 static int modify_qp_mask(enum ib_qp_type qp_type, int mask)
2013 {
2014         switch (qp_type) {
2015         case IB_QPT_XRC_INI:
2016                 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER);
2017         case IB_QPT_XRC_TGT:
2018                 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT |
2019                                 IB_QP_RNR_RETRY);
2020         default:
2021                 return mask;
2022         }
2023 }
2024
2025 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
2026                             const char __user *buf, int in_len,
2027                             int out_len)
2028 {
2029         struct ib_uverbs_modify_qp cmd;
2030         struct ib_udata            udata;
2031         struct ib_qp              *qp;
2032         struct ib_qp_attr         *attr;
2033         int                        ret;
2034
2035         if (copy_from_user(&cmd, buf, sizeof cmd))
2036                 return -EFAULT;
2037
2038         INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
2039                    out_len);
2040
2041         attr = kmalloc(sizeof *attr, GFP_KERNEL);
2042         if (!attr)
2043                 return -ENOMEM;
2044
2045         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2046         if (!qp) {
2047                 ret = -EINVAL;
2048                 goto out;
2049         }
2050
2051         attr->qp_state            = cmd.qp_state;
2052         attr->cur_qp_state        = cmd.cur_qp_state;
2053         attr->path_mtu            = cmd.path_mtu;
2054         attr->path_mig_state      = cmd.path_mig_state;
2055         attr->qkey                = cmd.qkey;
2056         attr->rq_psn              = cmd.rq_psn;
2057         attr->sq_psn              = cmd.sq_psn;
2058         attr->dest_qp_num         = cmd.dest_qp_num;
2059         attr->qp_access_flags     = cmd.qp_access_flags;
2060         attr->pkey_index          = cmd.pkey_index;
2061         attr->alt_pkey_index      = cmd.alt_pkey_index;
2062         attr->en_sqd_async_notify = cmd.en_sqd_async_notify;
2063         attr->max_rd_atomic       = cmd.max_rd_atomic;
2064         attr->max_dest_rd_atomic  = cmd.max_dest_rd_atomic;
2065         attr->min_rnr_timer       = cmd.min_rnr_timer;
2066         attr->port_num            = cmd.port_num;
2067         attr->timeout             = cmd.timeout;
2068         attr->retry_cnt           = cmd.retry_cnt;
2069         attr->rnr_retry           = cmd.rnr_retry;
2070         attr->alt_port_num        = cmd.alt_port_num;
2071         attr->alt_timeout         = cmd.alt_timeout;
2072
2073         memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16);
2074         attr->ah_attr.grh.flow_label        = cmd.dest.flow_label;
2075         attr->ah_attr.grh.sgid_index        = cmd.dest.sgid_index;
2076         attr->ah_attr.grh.hop_limit         = cmd.dest.hop_limit;
2077         attr->ah_attr.grh.traffic_class     = cmd.dest.traffic_class;
2078         attr->ah_attr.dlid                  = cmd.dest.dlid;
2079         attr->ah_attr.sl                    = cmd.dest.sl;
2080         attr->ah_attr.src_path_bits         = cmd.dest.src_path_bits;
2081         attr->ah_attr.static_rate           = cmd.dest.static_rate;
2082         attr->ah_attr.ah_flags              = cmd.dest.is_global ? IB_AH_GRH : 0;
2083         attr->ah_attr.port_num              = cmd.dest.port_num;
2084
2085         memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16);
2086         attr->alt_ah_attr.grh.flow_label    = cmd.alt_dest.flow_label;
2087         attr->alt_ah_attr.grh.sgid_index    = cmd.alt_dest.sgid_index;
2088         attr->alt_ah_attr.grh.hop_limit     = cmd.alt_dest.hop_limit;
2089         attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class;
2090         attr->alt_ah_attr.dlid              = cmd.alt_dest.dlid;
2091         attr->alt_ah_attr.sl                = cmd.alt_dest.sl;
2092         attr->alt_ah_attr.src_path_bits     = cmd.alt_dest.src_path_bits;
2093         attr->alt_ah_attr.static_rate       = cmd.alt_dest.static_rate;
2094         attr->alt_ah_attr.ah_flags          = cmd.alt_dest.is_global ? IB_AH_GRH : 0;
2095         attr->alt_ah_attr.port_num          = cmd.alt_dest.port_num;
2096
2097         if (qp->real_qp == qp) {
2098                 ret = ib_resolve_eth_l2_attrs(qp, attr, &cmd.attr_mask);
2099                 if (ret)
2100                         goto release_qp;
2101                 ret = qp->device->modify_qp(qp, attr,
2102                         modify_qp_mask(qp->qp_type, cmd.attr_mask), &udata);
2103         } else {
2104                 ret = ib_modify_qp(qp, attr, modify_qp_mask(qp->qp_type, cmd.attr_mask));
2105         }
2106
2107         if (ret)
2108                 goto release_qp;
2109
2110         ret = in_len;
2111
2112 release_qp:
2113         put_qp_read(qp);
2114
2115 out:
2116         kfree(attr);
2117
2118         return ret;
2119 }
2120
2121 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
2122                              const char __user *buf, int in_len,
2123                              int out_len)
2124 {
2125         struct ib_uverbs_destroy_qp      cmd;
2126         struct ib_uverbs_destroy_qp_resp resp;
2127         struct ib_uobject               *uobj;
2128         struct ib_qp                    *qp;
2129         struct ib_uqp_object            *obj;
2130         int                              ret = -EINVAL;
2131
2132         if (copy_from_user(&cmd, buf, sizeof cmd))
2133                 return -EFAULT;
2134
2135         memset(&resp, 0, sizeof resp);
2136
2137         uobj = idr_write_uobj(&ib_uverbs_qp_idr, cmd.qp_handle, file->ucontext);
2138         if (!uobj)
2139                 return -EINVAL;
2140         qp  = uobj->object;
2141         obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
2142
2143         if (!list_empty(&obj->mcast_list)) {
2144                 put_uobj_write(uobj);
2145                 return -EBUSY;
2146         }
2147
2148         ret = ib_destroy_qp(qp);
2149         if (!ret)
2150                 uobj->live = 0;
2151
2152         put_uobj_write(uobj);
2153
2154         if (ret)
2155                 return ret;
2156
2157         if (obj->uxrcd)
2158                 atomic_dec(&obj->uxrcd->refcnt);
2159
2160         idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
2161
2162         mutex_lock(&file->mutex);
2163         list_del(&uobj->list);
2164         mutex_unlock(&file->mutex);
2165
2166         ib_uverbs_release_uevent(file, &obj->uevent);
2167
2168         resp.events_reported = obj->uevent.events_reported;
2169
2170         put_uobj(uobj);
2171
2172         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2173                          &resp, sizeof resp))
2174                 return -EFAULT;
2175
2176         return in_len;
2177 }
2178
2179 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
2180                             const char __user *buf, int in_len,
2181                             int out_len)
2182 {
2183         struct ib_uverbs_post_send      cmd;
2184         struct ib_uverbs_post_send_resp resp;
2185         struct ib_uverbs_send_wr       *user_wr;
2186         struct ib_send_wr              *wr = NULL, *last, *next, *bad_wr;
2187         struct ib_qp                   *qp;
2188         int                             i, sg_ind;
2189         int                             is_ud;
2190         ssize_t                         ret = -EINVAL;
2191
2192         if (copy_from_user(&cmd, buf, sizeof cmd))
2193                 return -EFAULT;
2194
2195         if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
2196             cmd.sge_count * sizeof (struct ib_uverbs_sge))
2197                 return -EINVAL;
2198
2199         if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
2200                 return -EINVAL;
2201
2202         user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
2203         if (!user_wr)
2204                 return -ENOMEM;
2205
2206         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2207         if (!qp)
2208                 goto out;
2209
2210         is_ud = qp->qp_type == IB_QPT_UD;
2211         sg_ind = 0;
2212         last = NULL;
2213         for (i = 0; i < cmd.wr_count; ++i) {
2214                 if (copy_from_user(user_wr,
2215                                    buf + sizeof cmd + i * cmd.wqe_size,
2216                                    cmd.wqe_size)) {
2217                         ret = -EFAULT;
2218                         goto out_put;
2219                 }
2220
2221                 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
2222                         ret = -EINVAL;
2223                         goto out_put;
2224                 }
2225
2226                 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2227                                user_wr->num_sge * sizeof (struct ib_sge),
2228                                GFP_KERNEL);
2229                 if (!next) {
2230                         ret = -ENOMEM;
2231                         goto out_put;
2232                 }
2233
2234                 if (!last)
2235                         wr = next;
2236                 else
2237                         last->next = next;
2238                 last = next;
2239
2240                 next->next       = NULL;
2241                 next->wr_id      = user_wr->wr_id;
2242                 next->num_sge    = user_wr->num_sge;
2243                 next->opcode     = user_wr->opcode;
2244                 next->send_flags = user_wr->send_flags;
2245
2246                 if (is_ud) {
2247                         next->wr.ud.ah = idr_read_ah(user_wr->wr.ud.ah,
2248                                                      file->ucontext);
2249                         if (!next->wr.ud.ah) {
2250                                 ret = -EINVAL;
2251                                 goto out_put;
2252                         }
2253                         next->wr.ud.remote_qpn  = user_wr->wr.ud.remote_qpn;
2254                         next->wr.ud.remote_qkey = user_wr->wr.ud.remote_qkey;
2255                         if (next->opcode == IB_WR_SEND_WITH_IMM)
2256                                 next->ex.imm_data =
2257                                         (__be32 __force) user_wr->ex.imm_data;
2258                 } else {
2259                         switch (next->opcode) {
2260                         case IB_WR_RDMA_WRITE_WITH_IMM:
2261                                 next->ex.imm_data =
2262                                         (__be32 __force) user_wr->ex.imm_data;
2263                         case IB_WR_RDMA_WRITE:
2264                         case IB_WR_RDMA_READ:
2265                                 next->wr.rdma.remote_addr =
2266                                         user_wr->wr.rdma.remote_addr;
2267                                 next->wr.rdma.rkey        =
2268                                         user_wr->wr.rdma.rkey;
2269                                 break;
2270                         case IB_WR_SEND_WITH_IMM:
2271                                 next->ex.imm_data =
2272                                         (__be32 __force) user_wr->ex.imm_data;
2273                                 break;
2274                         case IB_WR_SEND_WITH_INV:
2275                                 next->ex.invalidate_rkey =
2276                                         user_wr->ex.invalidate_rkey;
2277                                 break;
2278                         case IB_WR_ATOMIC_CMP_AND_SWP:
2279                         case IB_WR_ATOMIC_FETCH_AND_ADD:
2280                                 next->wr.atomic.remote_addr =
2281                                         user_wr->wr.atomic.remote_addr;
2282                                 next->wr.atomic.compare_add =
2283                                         user_wr->wr.atomic.compare_add;
2284                                 next->wr.atomic.swap = user_wr->wr.atomic.swap;
2285                                 next->wr.atomic.rkey = user_wr->wr.atomic.rkey;
2286                                 break;
2287                         default:
2288                                 break;
2289                         }
2290                 }
2291
2292                 if (next->num_sge) {
2293                         next->sg_list = (void *) next +
2294                                 ALIGN(sizeof *next, sizeof (struct ib_sge));
2295                         if (copy_from_user(next->sg_list,
2296                                            buf + sizeof cmd +
2297                                            cmd.wr_count * cmd.wqe_size +
2298                                            sg_ind * sizeof (struct ib_sge),
2299                                            next->num_sge * sizeof (struct ib_sge))) {
2300                                 ret = -EFAULT;
2301                                 goto out_put;
2302                         }
2303                         sg_ind += next->num_sge;
2304                 } else
2305                         next->sg_list = NULL;
2306         }
2307
2308         resp.bad_wr = 0;
2309         ret = qp->device->post_send(qp->real_qp, wr, &bad_wr);
2310         if (ret)
2311                 for (next = wr; next; next = next->next) {
2312                         ++resp.bad_wr;
2313                         if (next == bad_wr)
2314                                 break;
2315                 }
2316
2317         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2318                          &resp, sizeof resp))
2319                 ret = -EFAULT;
2320
2321 out_put:
2322         put_qp_read(qp);
2323
2324         while (wr) {
2325                 if (is_ud && wr->wr.ud.ah)
2326                         put_ah_read(wr->wr.ud.ah);
2327                 next = wr->next;
2328                 kfree(wr);
2329                 wr = next;
2330         }
2331
2332 out:
2333         kfree(user_wr);
2334
2335         return ret ? ret : in_len;
2336 }
2337
2338 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
2339                                                     int in_len,
2340                                                     u32 wr_count,
2341                                                     u32 sge_count,
2342                                                     u32 wqe_size)
2343 {
2344         struct ib_uverbs_recv_wr *user_wr;
2345         struct ib_recv_wr        *wr = NULL, *last, *next;
2346         int                       sg_ind;
2347         int                       i;
2348         int                       ret;
2349
2350         if (in_len < wqe_size * wr_count +
2351             sge_count * sizeof (struct ib_uverbs_sge))
2352                 return ERR_PTR(-EINVAL);
2353
2354         if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
2355                 return ERR_PTR(-EINVAL);
2356
2357         user_wr = kmalloc(wqe_size, GFP_KERNEL);
2358         if (!user_wr)
2359                 return ERR_PTR(-ENOMEM);
2360
2361         sg_ind = 0;
2362         last = NULL;
2363         for (i = 0; i < wr_count; ++i) {
2364                 if (copy_from_user(user_wr, buf + i * wqe_size,
2365                                    wqe_size)) {
2366                         ret = -EFAULT;
2367                         goto err;
2368                 }
2369
2370                 if (user_wr->num_sge + sg_ind > sge_count) {
2371                         ret = -EINVAL;
2372                         goto err;
2373                 }
2374
2375                 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2376                                user_wr->num_sge * sizeof (struct ib_sge),
2377                                GFP_KERNEL);
2378                 if (!next) {
2379                         ret = -ENOMEM;
2380                         goto err;
2381                 }
2382
2383                 if (!last)
2384                         wr = next;
2385                 else
2386                         last->next = next;
2387                 last = next;
2388
2389                 next->next       = NULL;
2390                 next->wr_id      = user_wr->wr_id;
2391                 next->num_sge    = user_wr->num_sge;
2392
2393                 if (next->num_sge) {
2394                         next->sg_list = (void *) next +
2395                                 ALIGN(sizeof *next, sizeof (struct ib_sge));
2396                         if (copy_from_user(next->sg_list,
2397                                            buf + wr_count * wqe_size +
2398                                            sg_ind * sizeof (struct ib_sge),
2399                                            next->num_sge * sizeof (struct ib_sge))) {
2400                                 ret = -EFAULT;
2401                                 goto err;
2402                         }
2403                         sg_ind += next->num_sge;
2404                 } else
2405                         next->sg_list = NULL;
2406         }
2407
2408         kfree(user_wr);
2409         return wr;
2410
2411 err:
2412         kfree(user_wr);
2413
2414         while (wr) {
2415                 next = wr->next;
2416                 kfree(wr);
2417                 wr = next;
2418         }
2419
2420         return ERR_PTR(ret);
2421 }
2422
2423 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
2424                             const char __user *buf, int in_len,
2425                             int out_len)
2426 {
2427         struct ib_uverbs_post_recv      cmd;
2428         struct ib_uverbs_post_recv_resp resp;
2429         struct ib_recv_wr              *wr, *next, *bad_wr;
2430         struct ib_qp                   *qp;
2431         ssize_t                         ret = -EINVAL;
2432
2433         if (copy_from_user(&cmd, buf, sizeof cmd))
2434                 return -EFAULT;
2435
2436         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2437                                        in_len - sizeof cmd, cmd.wr_count,
2438                                        cmd.sge_count, cmd.wqe_size);
2439         if (IS_ERR(wr))
2440                 return PTR_ERR(wr);
2441
2442         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2443         if (!qp)
2444                 goto out;
2445
2446         resp.bad_wr = 0;
2447         ret = qp->device->post_recv(qp->real_qp, wr, &bad_wr);
2448
2449         put_qp_read(qp);
2450
2451         if (ret)
2452                 for (next = wr; next; next = next->next) {
2453                         ++resp.bad_wr;
2454                         if (next == bad_wr)
2455                                 break;
2456                 }
2457
2458         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2459                          &resp, sizeof resp))
2460                 ret = -EFAULT;
2461
2462 out:
2463         while (wr) {
2464                 next = wr->next;
2465                 kfree(wr);
2466                 wr = next;
2467         }
2468
2469         return ret ? ret : in_len;
2470 }
2471
2472 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
2473                                 const char __user *buf, int in_len,
2474                                 int out_len)
2475 {
2476         struct ib_uverbs_post_srq_recv      cmd;
2477         struct ib_uverbs_post_srq_recv_resp resp;
2478         struct ib_recv_wr                  *wr, *next, *bad_wr;
2479         struct ib_srq                      *srq;
2480         ssize_t                             ret = -EINVAL;
2481
2482         if (copy_from_user(&cmd, buf, sizeof cmd))
2483                 return -EFAULT;
2484
2485         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2486                                        in_len - sizeof cmd, cmd.wr_count,
2487                                        cmd.sge_count, cmd.wqe_size);
2488         if (IS_ERR(wr))
2489                 return PTR_ERR(wr);
2490
2491         srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2492         if (!srq)
2493                 goto out;
2494
2495         resp.bad_wr = 0;
2496         ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
2497
2498         put_srq_read(srq);
2499
2500         if (ret)
2501                 for (next = wr; next; next = next->next) {
2502                         ++resp.bad_wr;
2503                         if (next == bad_wr)
2504                                 break;
2505                 }
2506
2507         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2508                          &resp, sizeof resp))
2509                 ret = -EFAULT;
2510
2511 out:
2512         while (wr) {
2513                 next = wr->next;
2514                 kfree(wr);
2515                 wr = next;
2516         }
2517
2518         return ret ? ret : in_len;
2519 }
2520
2521 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
2522                             const char __user *buf, int in_len,
2523                             int out_len)
2524 {
2525         struct ib_uverbs_create_ah       cmd;
2526         struct ib_uverbs_create_ah_resp  resp;
2527         struct ib_uobject               *uobj;
2528         struct ib_pd                    *pd;
2529         struct ib_ah                    *ah;
2530         struct ib_ah_attr               attr;
2531         int ret;
2532
2533         if (out_len < sizeof resp)
2534                 return -ENOSPC;
2535
2536         if (copy_from_user(&cmd, buf, sizeof cmd))
2537                 return -EFAULT;
2538
2539         uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
2540         if (!uobj)
2541                 return -ENOMEM;
2542
2543         init_uobj(uobj, cmd.user_handle, file->ucontext, &ah_lock_class);
2544         down_write(&uobj->mutex);
2545
2546         pd = idr_read_pd(cmd.pd_handle, file->ucontext);
2547         if (!pd) {
2548                 ret = -EINVAL;
2549                 goto err;
2550         }
2551
2552         attr.dlid              = cmd.attr.dlid;
2553         attr.sl                = cmd.attr.sl;
2554         attr.src_path_bits     = cmd.attr.src_path_bits;
2555         attr.static_rate       = cmd.attr.static_rate;
2556         attr.ah_flags          = cmd.attr.is_global ? IB_AH_GRH : 0;
2557         attr.port_num          = cmd.attr.port_num;
2558         attr.grh.flow_label    = cmd.attr.grh.flow_label;
2559         attr.grh.sgid_index    = cmd.attr.grh.sgid_index;
2560         attr.grh.hop_limit     = cmd.attr.grh.hop_limit;
2561         attr.grh.traffic_class = cmd.attr.grh.traffic_class;
2562         attr.vlan_id           = 0;
2563         memset(&attr.dmac, 0, sizeof(attr.dmac));
2564         memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16);
2565
2566         ah = ib_create_ah(pd, &attr);
2567         if (IS_ERR(ah)) {
2568                 ret = PTR_ERR(ah);
2569                 goto err_put;
2570         }
2571
2572         ah->uobject  = uobj;
2573         uobj->object = ah;
2574
2575         ret = idr_add_uobj(&ib_uverbs_ah_idr, uobj);
2576         if (ret)
2577                 goto err_destroy;
2578
2579         resp.ah_handle = uobj->id;
2580
2581         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2582                          &resp, sizeof resp)) {
2583                 ret = -EFAULT;
2584                 goto err_copy;
2585         }
2586
2587         put_pd_read(pd);
2588
2589         mutex_lock(&file->mutex);
2590         list_add_tail(&uobj->list, &file->ucontext->ah_list);
2591         mutex_unlock(&file->mutex);
2592
2593         uobj->live = 1;
2594
2595         up_write(&uobj->mutex);
2596
2597         return in_len;
2598
2599 err_copy:
2600         idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
2601
2602 err_destroy:
2603         ib_destroy_ah(ah);
2604
2605 err_put:
2606         put_pd_read(pd);
2607
2608 err:
2609         put_uobj_write(uobj);
2610         return ret;
2611 }
2612
2613 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
2614                              const char __user *buf, int in_len, int out_len)
2615 {
2616         struct ib_uverbs_destroy_ah cmd;
2617         struct ib_ah               *ah;
2618         struct ib_uobject          *uobj;
2619         int                         ret;
2620
2621         if (copy_from_user(&cmd, buf, sizeof cmd))
2622                 return -EFAULT;
2623
2624         uobj = idr_write_uobj(&ib_uverbs_ah_idr, cmd.ah_handle, file->ucontext);
2625         if (!uobj)
2626                 return -EINVAL;
2627         ah = uobj->object;
2628
2629         ret = ib_destroy_ah(ah);
2630         if (!ret)
2631                 uobj->live = 0;
2632
2633         put_uobj_write(uobj);
2634
2635         if (ret)
2636                 return ret;
2637
2638         idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
2639
2640         mutex_lock(&file->mutex);
2641         list_del(&uobj->list);
2642         mutex_unlock(&file->mutex);
2643
2644         put_uobj(uobj);
2645
2646         return in_len;
2647 }
2648
2649 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
2650                                const char __user *buf, int in_len,
2651                                int out_len)
2652 {
2653         struct ib_uverbs_attach_mcast cmd;
2654         struct ib_qp                 *qp;
2655         struct ib_uqp_object         *obj;
2656         struct ib_uverbs_mcast_entry *mcast;
2657         int                           ret;
2658
2659         if (copy_from_user(&cmd, buf, sizeof cmd))
2660                 return -EFAULT;
2661
2662         qp = idr_write_qp(cmd.qp_handle, file->ucontext);
2663         if (!qp)
2664                 return -EINVAL;
2665
2666         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2667
2668         list_for_each_entry(mcast, &obj->mcast_list, list)
2669                 if (cmd.mlid == mcast->lid &&
2670                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2671                         ret = 0;
2672                         goto out_put;
2673                 }
2674
2675         mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
2676         if (!mcast) {
2677                 ret = -ENOMEM;
2678                 goto out_put;
2679         }
2680
2681         mcast->lid = cmd.mlid;
2682         memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
2683
2684         ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
2685         if (!ret)
2686                 list_add_tail(&mcast->list, &obj->mcast_list);
2687         else
2688                 kfree(mcast);
2689
2690 out_put:
2691         put_qp_write(qp);
2692
2693         return ret ? ret : in_len;
2694 }
2695
2696 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
2697                                const char __user *buf, int in_len,
2698                                int out_len)
2699 {
2700         struct ib_uverbs_detach_mcast cmd;
2701         struct ib_uqp_object         *obj;
2702         struct ib_qp                 *qp;
2703         struct ib_uverbs_mcast_entry *mcast;
2704         int                           ret = -EINVAL;
2705
2706         if (copy_from_user(&cmd, buf, sizeof cmd))
2707                 return -EFAULT;
2708
2709         qp = idr_write_qp(cmd.qp_handle, file->ucontext);
2710         if (!qp)
2711                 return -EINVAL;
2712
2713         ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
2714         if (ret)
2715                 goto out_put;
2716
2717         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2718
2719         list_for_each_entry(mcast, &obj->mcast_list, list)
2720                 if (cmd.mlid == mcast->lid &&
2721                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2722                         list_del(&mcast->list);
2723                         kfree(mcast);
2724                         break;
2725                 }
2726
2727 out_put:
2728         put_qp_write(qp);
2729
2730         return ret ? ret : in_len;
2731 }
2732
2733 static int kern_spec_to_ib_spec(struct ib_uverbs_flow_spec *kern_spec,
2734                                 union ib_flow_spec *ib_spec)
2735 {
2736         if (kern_spec->reserved)
2737                 return -EINVAL;
2738
2739         ib_spec->type = kern_spec->type;
2740
2741         switch (ib_spec->type) {
2742         case IB_FLOW_SPEC_ETH:
2743                 ib_spec->eth.size = sizeof(struct ib_flow_spec_eth);
2744                 if (ib_spec->eth.size != kern_spec->eth.size)
2745                         return -EINVAL;
2746                 memcpy(&ib_spec->eth.val, &kern_spec->eth.val,
2747                        sizeof(struct ib_flow_eth_filter));
2748                 memcpy(&ib_spec->eth.mask, &kern_spec->eth.mask,
2749                        sizeof(struct ib_flow_eth_filter));
2750                 break;
2751         case IB_FLOW_SPEC_IPV4:
2752                 ib_spec->ipv4.size = sizeof(struct ib_flow_spec_ipv4);
2753                 if (ib_spec->ipv4.size != kern_spec->ipv4.size)
2754                         return -EINVAL;
2755                 memcpy(&ib_spec->ipv4.val, &kern_spec->ipv4.val,
2756                        sizeof(struct ib_flow_ipv4_filter));
2757                 memcpy(&ib_spec->ipv4.mask, &kern_spec->ipv4.mask,
2758                        sizeof(struct ib_flow_ipv4_filter));
2759                 break;
2760         case IB_FLOW_SPEC_TCP:
2761         case IB_FLOW_SPEC_UDP:
2762                 ib_spec->tcp_udp.size = sizeof(struct ib_flow_spec_tcp_udp);
2763                 if (ib_spec->tcp_udp.size != kern_spec->tcp_udp.size)
2764                         return -EINVAL;
2765                 memcpy(&ib_spec->tcp_udp.val, &kern_spec->tcp_udp.val,
2766                        sizeof(struct ib_flow_tcp_udp_filter));
2767                 memcpy(&ib_spec->tcp_udp.mask, &kern_spec->tcp_udp.mask,
2768                        sizeof(struct ib_flow_tcp_udp_filter));
2769                 break;
2770         default:
2771                 return -EINVAL;
2772         }
2773         return 0;
2774 }
2775
2776 int ib_uverbs_ex_create_flow(struct ib_uverbs_file *file,
2777                              struct ib_udata *ucore,
2778                              struct ib_udata *uhw)
2779 {
2780         struct ib_uverbs_create_flow      cmd;
2781         struct ib_uverbs_create_flow_resp resp;
2782         struct ib_uobject                 *uobj;
2783         struct ib_flow                    *flow_id;
2784         struct ib_uverbs_flow_attr        *kern_flow_attr;
2785         struct ib_flow_attr               *flow_attr;
2786         struct ib_qp                      *qp;
2787         int err = 0;
2788         void *kern_spec;
2789         void *ib_spec;
2790         int i;
2791
2792         if (ucore->inlen < sizeof(cmd))
2793                 return -EINVAL;
2794
2795         if (ucore->outlen < sizeof(resp))
2796                 return -ENOSPC;
2797
2798         err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
2799         if (err)
2800                 return err;
2801
2802         ucore->inbuf += sizeof(cmd);
2803         ucore->inlen -= sizeof(cmd);
2804
2805         if (cmd.comp_mask)
2806                 return -EINVAL;
2807
2808         if ((cmd.flow_attr.type == IB_FLOW_ATTR_SNIFFER &&
2809              !capable(CAP_NET_ADMIN)) || !capable(CAP_NET_RAW))
2810                 return -EPERM;
2811
2812         if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS)
2813                 return -EINVAL;
2814
2815         if (cmd.flow_attr.size > ucore->inlen ||
2816             cmd.flow_attr.size >
2817             (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec)))
2818                 return -EINVAL;
2819
2820         if (cmd.flow_attr.reserved[0] ||
2821             cmd.flow_attr.reserved[1])
2822                 return -EINVAL;
2823
2824         if (cmd.flow_attr.num_of_specs) {
2825                 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size,
2826                                          GFP_KERNEL);
2827                 if (!kern_flow_attr)
2828                         return -ENOMEM;
2829
2830                 memcpy(kern_flow_attr, &cmd.flow_attr, sizeof(*kern_flow_attr));
2831                 err = ib_copy_from_udata(kern_flow_attr + 1, ucore,
2832                                          cmd.flow_attr.size);
2833                 if (err)
2834                         goto err_free_attr;
2835         } else {
2836                 kern_flow_attr = &cmd.flow_attr;
2837         }
2838
2839         uobj = kmalloc(sizeof(*uobj), GFP_KERNEL);
2840         if (!uobj) {
2841                 err = -ENOMEM;
2842                 goto err_free_attr;
2843         }
2844         init_uobj(uobj, 0, file->ucontext, &rule_lock_class);
2845         down_write(&uobj->mutex);
2846
2847         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2848         if (!qp) {
2849                 err = -EINVAL;
2850                 goto err_uobj;
2851         }
2852
2853         flow_attr = kmalloc(sizeof(*flow_attr) + cmd.flow_attr.size, GFP_KERNEL);
2854         if (!flow_attr) {
2855                 err = -ENOMEM;
2856                 goto err_put;
2857         }
2858
2859         flow_attr->type = kern_flow_attr->type;
2860         flow_attr->priority = kern_flow_attr->priority;
2861         flow_attr->num_of_specs = kern_flow_attr->num_of_specs;
2862         flow_attr->port = kern_flow_attr->port;
2863         flow_attr->flags = kern_flow_attr->flags;
2864         flow_attr->size = sizeof(*flow_attr);
2865
2866         kern_spec = kern_flow_attr + 1;
2867         ib_spec = flow_attr + 1;
2868         for (i = 0; i < flow_attr->num_of_specs &&
2869              cmd.flow_attr.size > offsetof(struct ib_uverbs_flow_spec, reserved) &&
2870              cmd.flow_attr.size >=
2871              ((struct ib_uverbs_flow_spec *)kern_spec)->size; i++) {
2872                 err = kern_spec_to_ib_spec(kern_spec, ib_spec);
2873                 if (err)
2874                         goto err_free;
2875                 flow_attr->size +=
2876                         ((union ib_flow_spec *) ib_spec)->size;
2877                 cmd.flow_attr.size -= ((struct ib_uverbs_flow_spec *)kern_spec)->size;
2878                 kern_spec += ((struct ib_uverbs_flow_spec *) kern_spec)->size;
2879                 ib_spec += ((union ib_flow_spec *) ib_spec)->size;
2880         }
2881         if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) {
2882                 pr_warn("create flow failed, flow %d: %d bytes left from uverb cmd\n",
2883                         i, cmd.flow_attr.size);
2884                 err = -EINVAL;
2885                 goto err_free;
2886         }
2887         flow_id = ib_create_flow(qp, flow_attr, IB_FLOW_DOMAIN_USER);
2888         if (IS_ERR(flow_id)) {
2889                 err = PTR_ERR(flow_id);
2890                 goto err_free;
2891         }
2892         flow_id->qp = qp;
2893         flow_id->uobject = uobj;
2894         uobj->object = flow_id;
2895
2896         err = idr_add_uobj(&ib_uverbs_rule_idr, uobj);
2897         if (err)
2898                 goto destroy_flow;
2899
2900         memset(&resp, 0, sizeof(resp));
2901         resp.flow_handle = uobj->id;
2902
2903         err = ib_copy_to_udata(ucore,
2904                                &resp, sizeof(resp));
2905         if (err)
2906                 goto err_copy;
2907
2908         put_qp_read(qp);
2909         mutex_lock(&file->mutex);
2910         list_add_tail(&uobj->list, &file->ucontext->rule_list);
2911         mutex_unlock(&file->mutex);
2912
2913         uobj->live = 1;
2914
2915         up_write(&uobj->mutex);
2916         kfree(flow_attr);
2917         if (cmd.flow_attr.num_of_specs)
2918                 kfree(kern_flow_attr);
2919         return 0;
2920 err_copy:
2921         idr_remove_uobj(&ib_uverbs_rule_idr, uobj);
2922 destroy_flow:
2923         ib_destroy_flow(flow_id);
2924 err_free:
2925         kfree(flow_attr);
2926 err_put:
2927         put_qp_read(qp);
2928 err_uobj:
2929         put_uobj_write(uobj);
2930 err_free_attr:
2931         if (cmd.flow_attr.num_of_specs)
2932                 kfree(kern_flow_attr);
2933         return err;
2934 }
2935
2936 int ib_uverbs_ex_destroy_flow(struct ib_uverbs_file *file,
2937                               struct ib_udata *ucore,
2938                               struct ib_udata *uhw)
2939 {
2940         struct ib_uverbs_destroy_flow   cmd;
2941         struct ib_flow                  *flow_id;
2942         struct ib_uobject               *uobj;
2943         int                             ret;
2944
2945         if (ucore->inlen < sizeof(cmd))
2946                 return -EINVAL;
2947
2948         ret = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
2949         if (ret)
2950                 return ret;
2951
2952         if (cmd.comp_mask)
2953                 return -EINVAL;
2954
2955         uobj = idr_write_uobj(&ib_uverbs_rule_idr, cmd.flow_handle,
2956                               file->ucontext);
2957         if (!uobj)
2958                 return -EINVAL;
2959         flow_id = uobj->object;
2960
2961         ret = ib_destroy_flow(flow_id);
2962         if (!ret)
2963                 uobj->live = 0;
2964
2965         put_uobj_write(uobj);
2966
2967         idr_remove_uobj(&ib_uverbs_rule_idr, uobj);
2968
2969         mutex_lock(&file->mutex);
2970         list_del(&uobj->list);
2971         mutex_unlock(&file->mutex);
2972
2973         put_uobj(uobj);
2974
2975         return ret;
2976 }
2977
2978 static int __uverbs_create_xsrq(struct ib_uverbs_file *file,
2979                                 struct ib_uverbs_create_xsrq *cmd,
2980                                 struct ib_udata *udata)
2981 {
2982         struct ib_uverbs_create_srq_resp resp;
2983         struct ib_usrq_object           *obj;
2984         struct ib_pd                    *pd;
2985         struct ib_srq                   *srq;
2986         struct ib_uobject               *uninitialized_var(xrcd_uobj);
2987         struct ib_srq_init_attr          attr;
2988         int ret;
2989
2990         obj = kmalloc(sizeof *obj, GFP_KERNEL);
2991         if (!obj)
2992                 return -ENOMEM;
2993
2994         init_uobj(&obj->uevent.uobject, cmd->user_handle, file->ucontext, &srq_lock_class);
2995         down_write(&obj->uevent.uobject.mutex);
2996
2997         if (cmd->srq_type == IB_SRQT_XRC) {
2998                 attr.ext.xrc.xrcd  = idr_read_xrcd(cmd->xrcd_handle, file->ucontext, &xrcd_uobj);
2999                 if (!attr.ext.xrc.xrcd) {
3000                         ret = -EINVAL;
3001                         goto err;
3002                 }
3003
3004                 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
3005                 atomic_inc(&obj->uxrcd->refcnt);
3006
3007                 attr.ext.xrc.cq  = idr_read_cq(cmd->cq_handle, file->ucontext, 0);
3008                 if (!attr.ext.xrc.cq) {
3009                         ret = -EINVAL;
3010                         goto err_put_xrcd;
3011                 }
3012         }
3013
3014         pd  = idr_read_pd(cmd->pd_handle, file->ucontext);
3015         if (!pd) {
3016                 ret = -EINVAL;
3017                 goto err_put_cq;
3018         }
3019
3020         attr.event_handler  = ib_uverbs_srq_event_handler;
3021         attr.srq_context    = file;
3022         attr.srq_type       = cmd->srq_type;
3023         attr.attr.max_wr    = cmd->max_wr;
3024         attr.attr.max_sge   = cmd->max_sge;
3025         attr.attr.srq_limit = cmd->srq_limit;
3026
3027         obj->uevent.events_reported = 0;
3028         INIT_LIST_HEAD(&obj->uevent.event_list);
3029
3030         srq = pd->device->create_srq(pd, &attr, udata);
3031         if (IS_ERR(srq)) {
3032                 ret = PTR_ERR(srq);
3033                 goto err_put;
3034         }
3035
3036         srq->device        = pd->device;
3037         srq->pd            = pd;
3038         srq->srq_type      = cmd->srq_type;
3039         srq->uobject       = &obj->uevent.uobject;
3040         srq->event_handler = attr.event_handler;
3041         srq->srq_context   = attr.srq_context;
3042
3043         if (cmd->srq_type == IB_SRQT_XRC) {
3044                 srq->ext.xrc.cq   = attr.ext.xrc.cq;
3045                 srq->ext.xrc.xrcd = attr.ext.xrc.xrcd;
3046                 atomic_inc(&attr.ext.xrc.cq->usecnt);
3047                 atomic_inc(&attr.ext.xrc.xrcd->usecnt);
3048         }
3049
3050         atomic_inc(&pd->usecnt);
3051         atomic_set(&srq->usecnt, 0);
3052
3053         obj->uevent.uobject.object = srq;
3054         ret = idr_add_uobj(&ib_uverbs_srq_idr, &obj->uevent.uobject);
3055         if (ret)
3056                 goto err_destroy;
3057
3058         memset(&resp, 0, sizeof resp);
3059         resp.srq_handle = obj->uevent.uobject.id;
3060         resp.max_wr     = attr.attr.max_wr;
3061         resp.max_sge    = attr.attr.max_sge;
3062         if (cmd->srq_type == IB_SRQT_XRC)
3063                 resp.srqn = srq->ext.xrc.srq_num;
3064
3065         if (copy_to_user((void __user *) (unsigned long) cmd->response,
3066                          &resp, sizeof resp)) {
3067                 ret = -EFAULT;
3068                 goto err_copy;
3069         }
3070
3071         if (cmd->srq_type == IB_SRQT_XRC) {
3072                 put_uobj_read(xrcd_uobj);
3073                 put_cq_read(attr.ext.xrc.cq);
3074         }
3075         put_pd_read(pd);
3076
3077         mutex_lock(&file->mutex);
3078         list_add_tail(&obj->uevent.uobject.list, &file->ucontext->srq_list);
3079         mutex_unlock(&file->mutex);
3080
3081         obj->uevent.uobject.live = 1;
3082
3083         up_write(&obj->uevent.uobject.mutex);
3084
3085         return 0;
3086
3087 err_copy:
3088         idr_remove_uobj(&ib_uverbs_srq_idr, &obj->uevent.uobject);
3089
3090 err_destroy:
3091         ib_destroy_srq(srq);
3092
3093 err_put:
3094         put_pd_read(pd);
3095
3096 err_put_cq:
3097         if (cmd->srq_type == IB_SRQT_XRC)
3098                 put_cq_read(attr.ext.xrc.cq);
3099
3100 err_put_xrcd:
3101         if (cmd->srq_type == IB_SRQT_XRC) {
3102                 atomic_dec(&obj->uxrcd->refcnt);
3103                 put_uobj_read(xrcd_uobj);
3104         }
3105
3106 err:
3107         put_uobj_write(&obj->uevent.uobject);
3108         return ret;
3109 }
3110
3111 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
3112                              const char __user *buf, int in_len,
3113                              int out_len)
3114 {
3115         struct ib_uverbs_create_srq      cmd;
3116         struct ib_uverbs_create_xsrq     xcmd;
3117         struct ib_uverbs_create_srq_resp resp;
3118         struct ib_udata                  udata;
3119         int ret;
3120
3121         if (out_len < sizeof resp)
3122                 return -ENOSPC;
3123
3124         if (copy_from_user(&cmd, buf, sizeof cmd))
3125                 return -EFAULT;
3126
3127         xcmd.response    = cmd.response;
3128         xcmd.user_handle = cmd.user_handle;
3129         xcmd.srq_type    = IB_SRQT_BASIC;
3130         xcmd.pd_handle   = cmd.pd_handle;
3131         xcmd.max_wr      = cmd.max_wr;
3132         xcmd.max_sge     = cmd.max_sge;
3133         xcmd.srq_limit   = cmd.srq_limit;
3134
3135         INIT_UDATA(&udata, buf + sizeof cmd,
3136                    (unsigned long) cmd.response + sizeof resp,
3137                    in_len - sizeof cmd, out_len - sizeof resp);
3138
3139         ret = __uverbs_create_xsrq(file, &xcmd, &udata);
3140         if (ret)
3141                 return ret;
3142
3143         return in_len;
3144 }
3145
3146 ssize_t ib_uverbs_create_xsrq(struct ib_uverbs_file *file,
3147                               const char __user *buf, int in_len, int out_len)
3148 {
3149         struct ib_uverbs_create_xsrq     cmd;
3150         struct ib_uverbs_create_srq_resp resp;
3151         struct ib_udata                  udata;
3152         int ret;
3153
3154         if (out_len < sizeof resp)
3155                 return -ENOSPC;
3156
3157         if (copy_from_user(&cmd, buf, sizeof cmd))
3158                 return -EFAULT;
3159
3160         INIT_UDATA(&udata, buf + sizeof cmd,
3161                    (unsigned long) cmd.response + sizeof resp,
3162                    in_len - sizeof cmd, out_len - sizeof resp);
3163
3164         ret = __uverbs_create_xsrq(file, &cmd, &udata);
3165         if (ret)
3166                 return ret;
3167
3168         return in_len;
3169 }
3170
3171 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
3172                              const char __user *buf, int in_len,
3173                              int out_len)
3174 {
3175         struct ib_uverbs_modify_srq cmd;
3176         struct ib_udata             udata;
3177         struct ib_srq              *srq;
3178         struct ib_srq_attr          attr;
3179         int                         ret;
3180
3181         if (copy_from_user(&cmd, buf, sizeof cmd))
3182                 return -EFAULT;
3183
3184         INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
3185                    out_len);
3186
3187         srq = idr_read_srq(cmd.srq_handle, file->ucontext);
3188         if (!srq)
3189                 return -EINVAL;
3190
3191         attr.max_wr    = cmd.max_wr;
3192         attr.srq_limit = cmd.srq_limit;
3193
3194         ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata);
3195
3196         put_srq_read(srq);
3197
3198         return ret ? ret : in_len;
3199 }
3200
3201 ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
3202                             const char __user *buf,
3203                             int in_len, int out_len)
3204 {
3205         struct ib_uverbs_query_srq      cmd;
3206         struct ib_uverbs_query_srq_resp resp;
3207         struct ib_srq_attr              attr;
3208         struct ib_srq                   *srq;
3209         int                             ret;
3210
3211         if (out_len < sizeof resp)
3212                 return -ENOSPC;
3213
3214         if (copy_from_user(&cmd, buf, sizeof cmd))
3215                 return -EFAULT;
3216
3217         srq = idr_read_srq(cmd.srq_handle, file->ucontext);
3218         if (!srq)
3219                 return -EINVAL;
3220
3221         ret = ib_query_srq(srq, &attr);
3222
3223         put_srq_read(srq);
3224
3225         if (ret)
3226                 return ret;
3227
3228         memset(&resp, 0, sizeof resp);
3229
3230         resp.max_wr    = attr.max_wr;
3231         resp.max_sge   = attr.max_sge;
3232         resp.srq_limit = attr.srq_limit;
3233
3234         if (copy_to_user((void __user *) (unsigned long) cmd.response,
3235                          &resp, sizeof resp))
3236                 return -EFAULT;
3237
3238         return in_len;
3239 }
3240
3241 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
3242                               const char __user *buf, int in_len,
3243                               int out_len)
3244 {
3245         struct ib_uverbs_destroy_srq      cmd;
3246         struct ib_uverbs_destroy_srq_resp resp;
3247         struct ib_uobject                *uobj;
3248         struct ib_srq                    *srq;
3249         struct ib_uevent_object          *obj;
3250         int                               ret = -EINVAL;
3251         struct ib_usrq_object            *us;
3252         enum ib_srq_type                  srq_type;
3253
3254         if (copy_from_user(&cmd, buf, sizeof cmd))
3255                 return -EFAULT;
3256
3257         uobj = idr_write_uobj(&ib_uverbs_srq_idr, cmd.srq_handle, file->ucontext);
3258         if (!uobj)
3259                 return -EINVAL;
3260         srq = uobj->object;
3261         obj = container_of(uobj, struct ib_uevent_object, uobject);
3262         srq_type = srq->srq_type;
3263
3264         ret = ib_destroy_srq(srq);
3265         if (!ret)
3266                 uobj->live = 0;
3267
3268         put_uobj_write(uobj);
3269
3270         if (ret)
3271                 return ret;
3272
3273         if (srq_type == IB_SRQT_XRC) {
3274                 us = container_of(obj, struct ib_usrq_object, uevent);
3275                 atomic_dec(&us->uxrcd->refcnt);
3276         }
3277
3278         idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
3279
3280         mutex_lock(&file->mutex);
3281         list_del(&uobj->list);
3282         mutex_unlock(&file->mutex);
3283
3284         ib_uverbs_release_uevent(file, obj);
3285
3286         memset(&resp, 0, sizeof resp);
3287         resp.events_reported = obj->events_reported;
3288
3289         put_uobj(uobj);
3290
3291         if (copy_to_user((void __user *) (unsigned long) cmd.response,
3292                          &resp, sizeof resp))
3293                 ret = -EFAULT;
3294
3295         return ret ? ret : in_len;
3296 }
3297
3298 int ib_uverbs_ex_query_device(struct ib_uverbs_file *file,
3299                               struct ib_udata *ucore,
3300                               struct ib_udata *uhw)
3301 {
3302         struct ib_uverbs_ex_query_device_resp resp;
3303         struct ib_uverbs_ex_query_device  cmd;
3304         struct ib_device_attr attr;
3305         struct ib_device *device;
3306         int err;
3307
3308         device = file->device->ib_dev;
3309         if (ucore->inlen < sizeof(cmd))
3310                 return -EINVAL;
3311
3312         err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3313         if (err)
3314                 return err;
3315
3316         if (cmd.comp_mask)
3317                 return -EINVAL;
3318
3319         if (cmd.reserved)
3320                 return -EINVAL;
3321
3322         resp.response_length = offsetof(typeof(resp), odp_caps);
3323
3324         if (ucore->outlen < resp.response_length)
3325                 return -ENOSPC;
3326
3327         err = device->query_device(device, &attr);
3328         if (err)
3329                 return err;
3330
3331         copy_query_dev_fields(file, &resp.base, &attr);
3332         resp.comp_mask = 0;
3333
3334         if (ucore->outlen < resp.response_length + sizeof(resp.odp_caps))
3335                 goto end;
3336
3337 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
3338         resp.odp_caps.general_caps = attr.odp_caps.general_caps;
3339         resp.odp_caps.per_transport_caps.rc_odp_caps =
3340                 attr.odp_caps.per_transport_caps.rc_odp_caps;
3341         resp.odp_caps.per_transport_caps.uc_odp_caps =
3342                 attr.odp_caps.per_transport_caps.uc_odp_caps;
3343         resp.odp_caps.per_transport_caps.ud_odp_caps =
3344                 attr.odp_caps.per_transport_caps.ud_odp_caps;
3345         resp.odp_caps.reserved = 0;
3346 #else
3347         memset(&resp.odp_caps, 0, sizeof(resp.odp_caps));
3348 #endif
3349         resp.response_length += sizeof(resp.odp_caps);
3350
3351 end:
3352         err = ib_copy_to_udata(ucore, &resp, resp.response_length);
3353         if (err)
3354                 return err;
3355
3356         return 0;
3357 }