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                               struct ib_device *ib_dev,
 286                               const char __user *buf,
 287                               int in_len, int out_len)
 288 {
 289         struct ib_uverbs_get_context      cmd;
 290         struct ib_uverbs_get_context_resp resp;
 291         struct ib_udata                   udata;
 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 = ib_dev->alloc_ucontext(ib_dev, &udata);
 317         if (IS_ERR(ucontext)) {
 318                 ret = PTR_ERR(ucontext);
 319                 goto err;
 320         }
 321
 322         ucontext->device = ib_dev;
 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(ib_dev, &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, ib_dev, 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->ucontext = ucontext;
 371
 372         fd_install(resp.async_fd, filp);
 373
 374         mutex_unlock(&file->mutex);
 375
 376         return in_len;
 377
 378 err_file:
 379         ib_uverbs_free_async_event_file(file);
 380         fput(filp);
 381
 382 err_fd:
 383         put_unused_fd(resp.async_fd);
 384
 385 err_free:
 386         put_pid(ucontext->tgid);
 387         ib_dev->dealloc_ucontext(ucontext);
 388
 389 err:
 390         mutex_unlock(&file->mutex);
 391         return ret;
 392 }
 393
 394 static void copy_query_dev_fields(struct ib_uverbs_file *file,
 395                                   struct ib_device *ib_dev,
 396                                   struct ib_uverbs_query_device_resp *resp,
 397                                   struct ib_device_attr *attr)
 398 {
 399         resp->fw_ver            = attr->fw_ver;
 400         resp->node_guid         = ib_dev->node_guid;
 401         resp->sys_image_guid    = attr->sys_image_guid;
 402         resp->max_mr_size       = attr->max_mr_size;
 403         resp->page_size_cap     = attr->page_size_cap;
 404         resp->vendor_id         = attr->vendor_id;
 405         resp->vendor_part_id    = attr->vendor_part_id;
 406         resp->hw_ver            = attr->hw_ver;
 407         resp->max_qp            = attr->max_qp;
 408         resp->max_qp_wr         = attr->max_qp_wr;
 409         resp->device_cap_flags  = attr->device_cap_flags;
 410         resp->max_sge           = attr->max_sge;
 411         resp->max_sge_rd        = attr->max_sge_rd;
 412         resp->max_cq            = attr->max_cq;
 413         resp->max_cqe           = attr->max_cqe;
 414         resp->max_mr            = attr->max_mr;
 415         resp->max_pd            = attr->max_pd;
 416         resp->max_qp_rd_atom    = attr->max_qp_rd_atom;
 417         resp->max_ee_rd_atom    = attr->max_ee_rd_atom;
 418         resp->max_res_rd_atom   = attr->max_res_rd_atom;
 419         resp->max_qp_init_rd_atom       = attr->max_qp_init_rd_atom;
 420         resp->max_ee_init_rd_atom       = attr->max_ee_init_rd_atom;
 421         resp->atomic_cap                = attr->atomic_cap;
 422         resp->max_ee                    = attr->max_ee;
 423         resp->max_rdd                   = attr->max_rdd;
 424         resp->max_mw                    = attr->max_mw;
 425         resp->max_raw_ipv6_qp           = attr->max_raw_ipv6_qp;
 426         resp->max_raw_ethy_qp           = attr->max_raw_ethy_qp;
 427         resp->max_mcast_grp             = attr->max_mcast_grp;
 428         resp->max_mcast_qp_attach       = attr->max_mcast_qp_attach;
 429         resp->max_total_mcast_qp_attach = attr->max_total_mcast_qp_attach;
 430         resp->max_ah                    = attr->max_ah;
 431         resp->max_fmr                   = attr->max_fmr;
 432         resp->max_map_per_fmr           = attr->max_map_per_fmr;
 433         resp->max_srq                   = attr->max_srq;
 434         resp->max_srq_wr                = attr->max_srq_wr;
 435         resp->max_srq_sge               = attr->max_srq_sge;
 436         resp->max_pkeys                 = attr->max_pkeys;
 437         resp->local_ca_ack_delay        = attr->local_ca_ack_delay;
 438         resp->phys_port_cnt             = ib_dev->phys_port_cnt;
 439 }
 440
 441 ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
 442                                struct ib_device *ib_dev,
 443                                const char __user *buf,
 444                                int in_len, int out_len)
 445 {
 446         struct ib_uverbs_query_device      cmd;
 447         struct ib_uverbs_query_device_resp resp;
 448         struct ib_device_attr              attr;
 449         int                                ret;
 450
 451         if (out_len < sizeof resp)
 452                 return -ENOSPC;
 453
 454         if (copy_from_user(&cmd, buf, sizeof cmd))
 455                 return -EFAULT;
 456
 457         ret = ib_query_device(ib_dev, &attr);
 458         if (ret)
 459                 return ret;
 460
 461         memset(&resp, 0, sizeof resp);
 462         copy_query_dev_fields(file, ib_dev, &resp, &attr);
 463
 464         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 465                          &resp, sizeof resp))
 466                 return -EFAULT;
 467
 468         return in_len;
 469 }
 470
 471 ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
 472                              struct ib_device *ib_dev,
 473                              const char __user *buf,
 474                              int in_len, int out_len)
 475 {
 476         struct ib_uverbs_query_port      cmd;
 477         struct ib_uverbs_query_port_resp resp;
 478         struct ib_port_attr              attr;
 479         int                              ret;
 480
 481         if (out_len < sizeof resp)
 482                 return -ENOSPC;
 483
 484         if (copy_from_user(&cmd, buf, sizeof cmd))
 485                 return -EFAULT;
 486
 487         ret = ib_query_port(ib_dev, cmd.port_num, &attr);
 488         if (ret)
 489                 return ret;
 490
 491         memset(&resp, 0, sizeof resp);
 492
 493         resp.state           = attr.state;
 494         resp.max_mtu         = attr.max_mtu;
 495         resp.active_mtu      = attr.active_mtu;
 496         resp.gid_tbl_len     = attr.gid_tbl_len;
 497         resp.port_cap_flags  = attr.port_cap_flags;
 498         resp.max_msg_sz      = attr.max_msg_sz;
 499         resp.bad_pkey_cntr   = attr.bad_pkey_cntr;
 500         resp.qkey_viol_cntr  = attr.qkey_viol_cntr;
 501         resp.pkey_tbl_len    = attr.pkey_tbl_len;
 502         resp.lid             = attr.lid;
 503         resp.sm_lid          = attr.sm_lid;
 504         resp.lmc             = attr.lmc;
 505         resp.max_vl_num      = attr.max_vl_num;
 506         resp.sm_sl           = attr.sm_sl;
 507         resp.subnet_timeout  = attr.subnet_timeout;
 508         resp.init_type_reply = attr.init_type_reply;
 509         resp.active_width    = attr.active_width;
 510         resp.active_speed    = attr.active_speed;
 511         resp.phys_state      = attr.phys_state;
 512         resp.link_layer      = rdma_port_get_link_layer(ib_dev,
 513                                                         cmd.port_num);
 514
 515         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 516                          &resp, sizeof resp))
 517                 return -EFAULT;
 518
 519         return in_len;
 520 }
 521
 522 ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
 523                            struct ib_device *ib_dev,
 524                            const char __user *buf,
 525                            int in_len, int out_len)
 526 {
 527         struct ib_uverbs_alloc_pd      cmd;
 528         struct ib_uverbs_alloc_pd_resp resp;
 529         struct ib_udata                udata;
 530         struct ib_uobject             *uobj;
 531         struct ib_pd                  *pd;
 532         int                            ret;
 533
 534         if (out_len < sizeof resp)
 535                 return -ENOSPC;
 536
 537         if (copy_from_user(&cmd, buf, sizeof cmd))
 538                 return -EFAULT;
 539
 540         INIT_UDATA(&udata, buf + sizeof cmd,
 541                    (unsigned long) cmd.response + sizeof resp,
 542                    in_len - sizeof cmd, out_len - sizeof resp);
 543
 544         uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
 545         if (!uobj)
 546                 return -ENOMEM;
 547
 548         init_uobj(uobj, 0, file->ucontext, &pd_lock_class);
 549         down_write(&uobj->mutex);
 550
 551         pd = ib_dev->alloc_pd(ib_dev, file->ucontext, &udata);
 552         if (IS_ERR(pd)) {
 553                 ret = PTR_ERR(pd);
 554                 goto err;
 555         }
 556
 557         pd->device  = ib_dev;
 558         pd->uobject = uobj;
 559         pd->local_mr = NULL;
 560         atomic_set(&pd->usecnt, 0);
 561
 562         uobj->object = pd;
 563         ret = idr_add_uobj(&ib_uverbs_pd_idr, uobj);
 564         if (ret)
 565                 goto err_idr;
 566
 567         memset(&resp, 0, sizeof resp);
 568         resp.pd_handle = uobj->id;
 569
 570         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 571                          &resp, sizeof resp)) {
 572                 ret = -EFAULT;
 573                 goto err_copy;
 574         }
 575
 576         mutex_lock(&file->mutex);
 577         list_add_tail(&uobj->list, &file->ucontext->pd_list);
 578         mutex_unlock(&file->mutex);
 579
 580         uobj->live = 1;
 581
 582         up_write(&uobj->mutex);
 583
 584         return in_len;
 585
 586 err_copy:
 587         idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
 588
 589 err_idr:
 590         ib_dealloc_pd(pd);
 591
 592 err:
 593         put_uobj_write(uobj);
 594         return ret;
 595 }
 596
 597 ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
 598                              struct ib_device *ib_dev,
 599                              const char __user *buf,
 600                              int in_len, int out_len)
 601 {
 602         struct ib_uverbs_dealloc_pd cmd;
 603         struct ib_uobject          *uobj;
 604         struct ib_pd               *pd;
 605         int                         ret;
 606
 607         if (copy_from_user(&cmd, buf, sizeof cmd))
 608                 return -EFAULT;
 609
 610         uobj = idr_write_uobj(&ib_uverbs_pd_idr, cmd.pd_handle, file->ucontext);
 611         if (!uobj)
 612                 return -EINVAL;
 613         pd = uobj->object;
 614
 615         if (atomic_read(&pd->usecnt)) {
 616                 ret = -EBUSY;
 617                 goto err_put;
 618         }
 619
 620         ret = pd->device->dealloc_pd(uobj->object);
 621         WARN_ONCE(ret, "Infiniband HW driver failed dealloc_pd");
 622         if (ret)
 623                 goto err_put;
 624
 625         uobj->live = 0;
 626         put_uobj_write(uobj);
 627
 628         idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
 629
 630         mutex_lock(&file->mutex);
 631         list_del(&uobj->list);
 632         mutex_unlock(&file->mutex);
 633
 634         put_uobj(uobj);
 635
 636         return in_len;
 637
 638 err_put:
 639         put_uobj_write(uobj);
 640         return ret;
 641 }
 642
 643 struct xrcd_table_entry {
 644         struct rb_node  node;
 645         struct ib_xrcd *xrcd;
 646         struct inode   *inode;
 647 };
 648
 649 static int xrcd_table_insert(struct ib_uverbs_device *dev,
 650                             struct inode *inode,
 651                             struct ib_xrcd *xrcd)
 652 {
 653         struct xrcd_table_entry *entry, *scan;
 654         struct rb_node **p = &dev->xrcd_tree.rb_node;
 655         struct rb_node *parent = NULL;
 656
 657         entry = kmalloc(sizeof *entry, GFP_KERNEL);
 658         if (!entry)
 659                 return -ENOMEM;
 660
 661         entry->xrcd  = xrcd;
 662         entry->inode = inode;
 663
 664         while (*p) {
 665                 parent = *p;
 666                 scan = rb_entry(parent, struct xrcd_table_entry, node);
 667
 668                 if (inode < scan->inode) {
 669                         p = &(*p)->rb_left;
 670                 } else if (inode > scan->inode) {
 671                         p = &(*p)->rb_right;
 672                 } else {
 673                         kfree(entry);
 674                         return -EEXIST;
 675                 }
 676         }
 677
 678         rb_link_node(&entry->node, parent, p);
 679         rb_insert_color(&entry->node, &dev->xrcd_tree);
 680         igrab(inode);
 681         return 0;
 682 }
 683
 684 static struct xrcd_table_entry *xrcd_table_search(struct ib_uverbs_device *dev,
 685                                                   struct inode *inode)
 686 {
 687         struct xrcd_table_entry *entry;
 688         struct rb_node *p = dev->xrcd_tree.rb_node;
 689
 690         while (p) {
 691                 entry = rb_entry(p, struct xrcd_table_entry, node);
 692
 693                 if (inode < entry->inode)
 694                         p = p->rb_left;
 695                 else if (inode > entry->inode)
 696                         p = p->rb_right;
 697                 else
 698                         return entry;
 699         }
 700
 701         return NULL;
 702 }
 703
 704 static struct ib_xrcd *find_xrcd(struct ib_uverbs_device *dev, struct inode *inode)
 705 {
 706         struct xrcd_table_entry *entry;
 707
 708         entry = xrcd_table_search(dev, inode);
 709         if (!entry)
 710                 return NULL;
 711
 712         return entry->xrcd;
 713 }
 714
 715 static void xrcd_table_delete(struct ib_uverbs_device *dev,
 716                               struct inode *inode)
 717 {
 718         struct xrcd_table_entry *entry;
 719
 720         entry = xrcd_table_search(dev, inode);
 721         if (entry) {
 722                 iput(inode);
 723                 rb_erase(&entry->node, &dev->xrcd_tree);
 724                 kfree(entry);
 725         }
 726 }
 727
 728 ssize_t ib_uverbs_open_xrcd(struct ib_uverbs_file *file,
 729                             struct ib_device *ib_dev,
 730                             const char __user *buf, int in_len,
 731                             int out_len)
 732 {
 733         struct ib_uverbs_open_xrcd      cmd;
 734         struct ib_uverbs_open_xrcd_resp resp;
 735         struct ib_udata                 udata;
 736         struct ib_uxrcd_object         *obj;
 737         struct ib_xrcd                 *xrcd = NULL;
 738         struct fd                       f = {NULL, 0};
 739         struct inode                   *inode = NULL;
 740         int                             ret = 0;
 741         int                             new_xrcd = 0;
 742
 743         if (out_len < sizeof resp)
 744                 return -ENOSPC;
 745
 746         if (copy_from_user(&cmd, buf, sizeof cmd))
 747                 return -EFAULT;
 748
 749         INIT_UDATA(&udata, buf + sizeof cmd,
 750                    (unsigned long) cmd.response + sizeof resp,
 751                    in_len - sizeof cmd, out_len - sizeof  resp);
 752
 753         mutex_lock(&file->device->xrcd_tree_mutex);
 754
 755         if (cmd.fd != -1) {
 756                 /* search for file descriptor */
 757                 f = fdget(cmd.fd);
 758                 if (!f.file) {
 759                         ret = -EBADF;
 760                         goto err_tree_mutex_unlock;
 761                 }
 762
 763                 inode = file_inode(f.file);
 764                 xrcd = find_xrcd(file->device, inode);
 765                 if (!xrcd && !(cmd.oflags & O_CREAT)) {
 766                         /* no file descriptor. Need CREATE flag */
 767                         ret = -EAGAIN;
 768                         goto err_tree_mutex_unlock;
 769                 }
 770
 771                 if (xrcd && cmd.oflags & O_EXCL) {
 772                         ret = -EINVAL;
 773                         goto err_tree_mutex_unlock;
 774                 }
 775         }
 776
 777         obj = kmalloc(sizeof *obj, GFP_KERNEL);
 778         if (!obj) {
 779                 ret = -ENOMEM;
 780                 goto err_tree_mutex_unlock;
 781         }
 782
 783         init_uobj(&obj->uobject, 0, file->ucontext, &xrcd_lock_class);
 784
 785         down_write(&obj->uobject.mutex);
 786
 787         if (!xrcd) {
 788                 xrcd = ib_dev->alloc_xrcd(ib_dev, file->ucontext, &udata);
 789                 if (IS_ERR(xrcd)) {
 790                         ret = PTR_ERR(xrcd);
 791                         goto err;
 792                 }
 793
 794                 xrcd->inode   = inode;
 795                 xrcd->device  = ib_dev;
 796                 atomic_set(&xrcd->usecnt, 0);
 797                 mutex_init(&xrcd->tgt_qp_mutex);
 798                 INIT_LIST_HEAD(&xrcd->tgt_qp_list);
 799                 new_xrcd = 1;
 800         }
 801
 802         atomic_set(&obj->refcnt, 0);
 803         obj->uobject.object = xrcd;
 804         ret = idr_add_uobj(&ib_uverbs_xrcd_idr, &obj->uobject);
 805         if (ret)
 806                 goto err_idr;
 807
 808         memset(&resp, 0, sizeof resp);
 809         resp.xrcd_handle = obj->uobject.id;
 810
 811         if (inode) {
 812                 if (new_xrcd) {
 813                         /* create new inode/xrcd table entry */
 814                         ret = xrcd_table_insert(file->device, inode, xrcd);
 815                         if (ret)
 816                                 goto err_insert_xrcd;
 817                 }
 818                 atomic_inc(&xrcd->usecnt);
 819         }
 820
 821         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 822                          &resp, sizeof resp)) {
 823                 ret = -EFAULT;
 824                 goto err_copy;
 825         }
 826
 827         if (f.file)
 828                 fdput(f);
 829
 830         mutex_lock(&file->mutex);
 831         list_add_tail(&obj->uobject.list, &file->ucontext->xrcd_list);
 832         mutex_unlock(&file->mutex);
 833
 834         obj->uobject.live = 1;
 835         up_write(&obj->uobject.mutex);
 836
 837         mutex_unlock(&file->device->xrcd_tree_mutex);
 838         return in_len;
 839
 840 err_copy:
 841         if (inode) {
 842                 if (new_xrcd)
 843                         xrcd_table_delete(file->device, inode);
 844                 atomic_dec(&xrcd->usecnt);
 845         }
 846
 847 err_insert_xrcd:
 848         idr_remove_uobj(&ib_uverbs_xrcd_idr, &obj->uobject);
 849
 850 err_idr:
 851         ib_dealloc_xrcd(xrcd);
 852
 853 err:
 854         put_uobj_write(&obj->uobject);
 855
 856 err_tree_mutex_unlock:
 857         if (f.file)
 858                 fdput(f);
 859
 860         mutex_unlock(&file->device->xrcd_tree_mutex);
 861
 862         return ret;
 863 }
 864
 865 ssize_t ib_uverbs_close_xrcd(struct ib_uverbs_file *file,
 866                              struct ib_device *ib_dev,
 867                              const char __user *buf, int in_len,
 868                              int out_len)
 869 {
 870         struct ib_uverbs_close_xrcd cmd;
 871         struct ib_uobject           *uobj;
 872         struct ib_xrcd              *xrcd = NULL;
 873         struct inode                *inode = NULL;
 874         struct ib_uxrcd_object      *obj;
 875         int                         live;
 876         int                         ret = 0;
 877
 878         if (copy_from_user(&cmd, buf, sizeof cmd))
 879                 return -EFAULT;
 880
 881         mutex_lock(&file->device->xrcd_tree_mutex);
 882         uobj = idr_write_uobj(&ib_uverbs_xrcd_idr, cmd.xrcd_handle, file->ucontext);
 883         if (!uobj) {
 884                 ret = -EINVAL;
 885                 goto out;
 886         }
 887
 888         xrcd  = uobj->object;
 889         inode = xrcd->inode;
 890         obj   = container_of(uobj, struct ib_uxrcd_object, uobject);
 891         if (atomic_read(&obj->refcnt)) {
 892                 put_uobj_write(uobj);
 893                 ret = -EBUSY;
 894                 goto out;
 895         }
 896
 897         if (!inode || atomic_dec_and_test(&xrcd->usecnt)) {
 898                 ret = ib_dealloc_xrcd(uobj->object);
 899                 if (!ret)
 900                         uobj->live = 0;
 901         }
 902
 903         live = uobj->live;
 904         if (inode && ret)
 905                 atomic_inc(&xrcd->usecnt);
 906
 907         put_uobj_write(uobj);
 908
 909         if (ret)
 910                 goto out;
 911
 912         if (inode && !live)
 913                 xrcd_table_delete(file->device, inode);
 914
 915         idr_remove_uobj(&ib_uverbs_xrcd_idr, uobj);
 916         mutex_lock(&file->mutex);
 917         list_del(&uobj->list);
 918         mutex_unlock(&file->mutex);
 919
 920         put_uobj(uobj);
 921         ret = in_len;
 922
 923 out:
 924         mutex_unlock(&file->device->xrcd_tree_mutex);
 925         return ret;
 926 }
 927
 928 void ib_uverbs_dealloc_xrcd(struct ib_uverbs_device *dev,
 929                             struct ib_xrcd *xrcd)
 930 {
 931         struct inode *inode;
 932
 933         inode = xrcd->inode;
 934         if (inode && !atomic_dec_and_test(&xrcd->usecnt))
 935                 return;
 936
 937         ib_dealloc_xrcd(xrcd);
 938
 939         if (inode)
 940                 xrcd_table_delete(dev, inode);
 941 }
 942
 943 ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
 944                          struct ib_device *ib_dev,
 945                          const char __user *buf, int in_len,
 946                          int out_len)
 947 {
 948         struct ib_uverbs_reg_mr      cmd;
 949         struct ib_uverbs_reg_mr_resp resp;
 950         struct ib_udata              udata;
 951         struct ib_uobject           *uobj;
 952         struct ib_pd                *pd;
 953         struct ib_mr                *mr;
 954         int                          ret;
 955
 956         if (out_len < sizeof resp)
 957                 return -ENOSPC;
 958
 959         if (copy_from_user(&cmd, buf, sizeof cmd))
 960                 return -EFAULT;
 961
 962         INIT_UDATA(&udata, buf + sizeof cmd,
 963                    (unsigned long) cmd.response + sizeof resp,
 964                    in_len - sizeof cmd, out_len - sizeof resp);
 965
 966         if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
 967                 return -EINVAL;
 968
 969         ret = ib_check_mr_access(cmd.access_flags);
 970         if (ret)
 971                 return ret;
 972
 973         uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
 974         if (!uobj)
 975                 return -ENOMEM;
 976
 977         init_uobj(uobj, 0, file->ucontext, &mr_lock_class);
 978         down_write(&uobj->mutex);
 979
 980         pd = idr_read_pd(cmd.pd_handle, file->ucontext);
 981         if (!pd) {
 982                 ret = -EINVAL;
 983                 goto err_free;
 984         }
 985
 986         if (cmd.access_flags & IB_ACCESS_ON_DEMAND) {
 987                 struct ib_device_attr attr;
 988
 989                 ret = ib_query_device(pd->device, &attr);
 990                 if (ret || !(attr.device_cap_flags &
 991                                 IB_DEVICE_ON_DEMAND_PAGING)) {
 992                         pr_debug("ODP support not available\n");
 993                         ret = -EINVAL;
 994                         goto err_put;
 995                 }
 996         }
 997
 998         mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
 999                                      cmd.access_flags, &udata);
1000         if (IS_ERR(mr)) {
1001                 ret = PTR_ERR(mr);
1002                 goto err_put;
1003         }
1004
1005         mr->device  = pd->device;
1006         mr->pd      = pd;
1007         mr->uobject = uobj;
1008         atomic_inc(&pd->usecnt);
1009         atomic_set(&mr->usecnt, 0);
1010
1011         uobj->object = mr;
1012         ret = idr_add_uobj(&ib_uverbs_mr_idr, uobj);
1013         if (ret)
1014                 goto err_unreg;
1015
1016         memset(&resp, 0, sizeof resp);
1017         resp.lkey      = mr->lkey;
1018         resp.rkey      = mr->rkey;
1019         resp.mr_handle = uobj->id;
1020
1021         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1022                          &resp, sizeof resp)) {
1023                 ret = -EFAULT;
1024                 goto err_copy;
1025         }
1026
1027         put_pd_read(pd);
1028
1029         mutex_lock(&file->mutex);
1030         list_add_tail(&uobj->list, &file->ucontext->mr_list);
1031         mutex_unlock(&file->mutex);
1032
1033         uobj->live = 1;
1034
1035         up_write(&uobj->mutex);
1036
1037         return in_len;
1038
1039 err_copy:
1040         idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
1041
1042 err_unreg:
1043         ib_dereg_mr(mr);
1044
1045 err_put:
1046         put_pd_read(pd);
1047
1048 err_free:
1049         put_uobj_write(uobj);
1050         return ret;
1051 }
1052
1053 ssize_t ib_uverbs_rereg_mr(struct ib_uverbs_file *file,
1054                            struct ib_device *ib_dev,
1055                            const char __user *buf, int in_len,
1056                            int out_len)
1057 {
1058         struct ib_uverbs_rereg_mr      cmd;
1059         struct ib_uverbs_rereg_mr_resp resp;
1060         struct ib_udata              udata;
1061         struct ib_pd                *pd = NULL;
1062         struct ib_mr                *mr;
1063         struct ib_pd                *old_pd;
1064         int                          ret;
1065         struct ib_uobject           *uobj;
1066
1067         if (out_len < sizeof(resp))
1068                 return -ENOSPC;
1069
1070         if (copy_from_user(&cmd, buf, sizeof(cmd)))
1071                 return -EFAULT;
1072
1073         INIT_UDATA(&udata, buf + sizeof(cmd),
1074                    (unsigned long) cmd.response + sizeof(resp),
1075                    in_len - sizeof(cmd), out_len - sizeof(resp));
1076
1077         if (cmd.flags & ~IB_MR_REREG_SUPPORTED || !cmd.flags)
1078                 return -EINVAL;
1079
1080         if ((cmd.flags & IB_MR_REREG_TRANS) &&
1081             (!cmd.start || !cmd.hca_va || 0 >= cmd.length ||
1082              (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)))
1083                         return -EINVAL;
1084
1085         uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle,
1086                               file->ucontext);
1087
1088         if (!uobj)
1089                 return -EINVAL;
1090
1091         mr = uobj->object;
1092
1093         if (cmd.flags & IB_MR_REREG_ACCESS) {
1094                 ret = ib_check_mr_access(cmd.access_flags);
1095                 if (ret)
1096                         goto put_uobjs;
1097         }
1098
1099         if (cmd.flags & IB_MR_REREG_PD) {
1100                 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1101                 if (!pd) {
1102                         ret = -EINVAL;
1103                         goto put_uobjs;
1104                 }
1105         }
1106
1107         if (atomic_read(&mr->usecnt)) {
1108                 ret = -EBUSY;
1109                 goto put_uobj_pd;
1110         }
1111
1112         old_pd = mr->pd;
1113         ret = mr->device->rereg_user_mr(mr, cmd.flags, cmd.start,
1114                                         cmd.length, cmd.hca_va,
1115                                         cmd.access_flags, pd, &udata);
1116         if (!ret) {
1117                 if (cmd.flags & IB_MR_REREG_PD) {
1118                         atomic_inc(&pd->usecnt);
1119                         mr->pd = pd;
1120                         atomic_dec(&old_pd->usecnt);
1121                 }
1122         } else {
1123                 goto put_uobj_pd;
1124         }
1125
1126         memset(&resp, 0, sizeof(resp));
1127         resp.lkey      = mr->lkey;
1128         resp.rkey      = mr->rkey;
1129
1130         if (copy_to_user((void __user *)(unsigned long)cmd.response,
1131                          &resp, sizeof(resp)))
1132                 ret = -EFAULT;
1133         else
1134                 ret = in_len;
1135
1136 put_uobj_pd:
1137         if (cmd.flags & IB_MR_REREG_PD)
1138                 put_pd_read(pd);
1139
1140 put_uobjs:
1141
1142         put_uobj_write(mr->uobject);
1143
1144         return ret;
1145 }
1146
1147 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
1148                            struct ib_device *ib_dev,
1149                            const char __user *buf, int in_len,
1150                            int out_len)
1151 {
1152         struct ib_uverbs_dereg_mr cmd;
1153         struct ib_mr             *mr;
1154         struct ib_uobject        *uobj;
1155         int                       ret = -EINVAL;
1156
1157         if (copy_from_user(&cmd, buf, sizeof cmd))
1158                 return -EFAULT;
1159
1160         uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle, file->ucontext);
1161         if (!uobj)
1162                 return -EINVAL;
1163
1164         mr = uobj->object;
1165
1166         ret = ib_dereg_mr(mr);
1167         if (!ret)
1168                 uobj->live = 0;
1169
1170         put_uobj_write(uobj);
1171
1172         if (ret)
1173                 return ret;
1174
1175         idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
1176
1177         mutex_lock(&file->mutex);
1178         list_del(&uobj->list);
1179         mutex_unlock(&file->mutex);
1180
1181         put_uobj(uobj);
1182
1183         return in_len;
1184 }
1185
1186 ssize_t ib_uverbs_alloc_mw(struct ib_uverbs_file *file,
1187                            struct ib_device *ib_dev,
1188                            const char __user *buf, int in_len,
1189                            int out_len)
1190 {
1191         struct ib_uverbs_alloc_mw      cmd;
1192         struct ib_uverbs_alloc_mw_resp resp;
1193         struct ib_uobject             *uobj;
1194         struct ib_pd                  *pd;
1195         struct ib_mw                  *mw;
1196         int                            ret;
1197
1198         if (out_len < sizeof(resp))
1199                 return -ENOSPC;
1200
1201         if (copy_from_user(&cmd, buf, sizeof(cmd)))
1202                 return -EFAULT;
1203
1204         uobj = kmalloc(sizeof(*uobj), GFP_KERNEL);
1205         if (!uobj)
1206                 return -ENOMEM;
1207
1208         init_uobj(uobj, 0, file->ucontext, &mw_lock_class);
1209         down_write(&uobj->mutex);
1210
1211         pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1212         if (!pd) {
1213                 ret = -EINVAL;
1214                 goto err_free;
1215         }
1216
1217         mw = pd->device->alloc_mw(pd, cmd.mw_type);
1218         if (IS_ERR(mw)) {
1219                 ret = PTR_ERR(mw);
1220                 goto err_put;
1221         }
1222
1223         mw->device  = pd->device;
1224         mw->pd      = pd;
1225         mw->uobject = uobj;
1226         atomic_inc(&pd->usecnt);
1227
1228         uobj->object = mw;
1229         ret = idr_add_uobj(&ib_uverbs_mw_idr, uobj);
1230         if (ret)
1231                 goto err_unalloc;
1232
1233         memset(&resp, 0, sizeof(resp));
1234         resp.rkey      = mw->rkey;
1235         resp.mw_handle = uobj->id;
1236
1237         if (copy_to_user((void __user *)(unsigned long)cmd.response,
1238                          &resp, sizeof(resp))) {
1239                 ret = -EFAULT;
1240                 goto err_copy;
1241         }
1242
1243         put_pd_read(pd);
1244
1245         mutex_lock(&file->mutex);
1246         list_add_tail(&uobj->list, &file->ucontext->mw_list);
1247         mutex_unlock(&file->mutex);
1248
1249         uobj->live = 1;
1250
1251         up_write(&uobj->mutex);
1252
1253         return in_len;
1254
1255 err_copy:
1256         idr_remove_uobj(&ib_uverbs_mw_idr, uobj);
1257
1258 err_unalloc:
1259         ib_dealloc_mw(mw);
1260
1261 err_put:
1262         put_pd_read(pd);
1263
1264 err_free:
1265         put_uobj_write(uobj);
1266         return ret;
1267 }
1268
1269 ssize_t ib_uverbs_dealloc_mw(struct ib_uverbs_file *file,
1270                              struct ib_device *ib_dev,
1271                              const char __user *buf, int in_len,
1272                              int out_len)
1273 {
1274         struct ib_uverbs_dealloc_mw cmd;
1275         struct ib_mw               *mw;
1276         struct ib_uobject          *uobj;
1277         int                         ret = -EINVAL;
1278
1279         if (copy_from_user(&cmd, buf, sizeof(cmd)))
1280                 return -EFAULT;
1281
1282         uobj = idr_write_uobj(&ib_uverbs_mw_idr, cmd.mw_handle, file->ucontext);
1283         if (!uobj)
1284                 return -EINVAL;
1285
1286         mw = uobj->object;
1287
1288         ret = ib_dealloc_mw(mw);
1289         if (!ret)
1290                 uobj->live = 0;
1291
1292         put_uobj_write(uobj);
1293
1294         if (ret)
1295                 return ret;
1296
1297         idr_remove_uobj(&ib_uverbs_mw_idr, uobj);
1298
1299         mutex_lock(&file->mutex);
1300         list_del(&uobj->list);
1301         mutex_unlock(&file->mutex);
1302
1303         put_uobj(uobj);
1304
1305         return in_len;
1306 }
1307
1308 ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
1309                                       struct ib_device *ib_dev,
1310                                       const char __user *buf, int in_len,
1311                                       int out_len)
1312 {
1313         struct ib_uverbs_create_comp_channel       cmd;
1314         struct ib_uverbs_create_comp_channel_resp  resp;
1315         struct file                               *filp;
1316         int ret;
1317
1318         if (out_len < sizeof resp)
1319                 return -ENOSPC;
1320
1321         if (copy_from_user(&cmd, buf, sizeof cmd))
1322                 return -EFAULT;
1323
1324         ret = get_unused_fd_flags(O_CLOEXEC);
1325         if (ret < 0)
1326                 return ret;
1327         resp.fd = ret;
1328
1329         filp = ib_uverbs_alloc_event_file(file, ib_dev, 0);
1330         if (IS_ERR(filp)) {
1331                 put_unused_fd(resp.fd);
1332                 return PTR_ERR(filp);
1333         }
1334
1335         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1336                          &resp, sizeof resp)) {
1337                 put_unused_fd(resp.fd);
1338                 fput(filp);
1339                 return -EFAULT;
1340         }
1341
1342         fd_install(resp.fd, filp);
1343         return in_len;
1344 }
1345
1346 static struct ib_ucq_object *create_cq(struct ib_uverbs_file *file,
1347                                         struct ib_device *ib_dev,
1348                                        struct ib_udata *ucore,
1349                                        struct ib_udata *uhw,
1350                                        struct ib_uverbs_ex_create_cq *cmd,
1351                                        size_t cmd_sz,
1352                                        int (*cb)(struct ib_uverbs_file *file,
1353                                                  struct ib_ucq_object *obj,
1354                                                  struct ib_uverbs_ex_create_cq_resp *resp,
1355                                                  struct ib_udata *udata,
1356                                                  void *context),
1357                                        void *context)
1358 {
1359         struct ib_ucq_object           *obj;
1360         struct ib_uverbs_event_file    *ev_file = NULL;
1361         struct ib_cq                   *cq;
1362         int                             ret;
1363         struct ib_uverbs_ex_create_cq_resp resp;
1364         struct ib_cq_init_attr attr = {};
1365
1366         if (cmd->comp_vector >= file->device->num_comp_vectors)
1367                 return ERR_PTR(-EINVAL);
1368
1369         obj = kmalloc(sizeof *obj, GFP_KERNEL);
1370         if (!obj)
1371                 return ERR_PTR(-ENOMEM);
1372
1373         init_uobj(&obj->uobject, cmd->user_handle, file->ucontext, &cq_lock_class);
1374         down_write(&obj->uobject.mutex);
1375
1376         if (cmd->comp_channel >= 0) {
1377                 ev_file = ib_uverbs_lookup_comp_file(cmd->comp_channel);
1378                 if (!ev_file) {
1379                         ret = -EINVAL;
1380                         goto err;
1381                 }
1382         }
1383
1384         obj->uverbs_file           = file;
1385         obj->comp_events_reported  = 0;
1386         obj->async_events_reported = 0;
1387         INIT_LIST_HEAD(&obj->comp_list);
1388         INIT_LIST_HEAD(&obj->async_list);
1389
1390         attr.cqe = cmd->cqe;
1391         attr.comp_vector = cmd->comp_vector;
1392
1393         if (cmd_sz > offsetof(typeof(*cmd), flags) + sizeof(cmd->flags))
1394                 attr.flags = cmd->flags;
1395
1396         cq = ib_dev->create_cq(ib_dev, &attr,
1397                                              file->ucontext, uhw);
1398         if (IS_ERR(cq)) {
1399                 ret = PTR_ERR(cq);
1400                 goto err_file;
1401         }
1402
1403         cq->device        = ib_dev;
1404         cq->uobject       = &obj->uobject;
1405         cq->comp_handler  = ib_uverbs_comp_handler;
1406         cq->event_handler = ib_uverbs_cq_event_handler;
1407         cq->cq_context    = ev_file;
1408         atomic_set(&cq->usecnt, 0);
1409
1410         obj->uobject.object = cq;
1411         ret = idr_add_uobj(&ib_uverbs_cq_idr, &obj->uobject);
1412         if (ret)
1413                 goto err_free;
1414
1415         memset(&resp, 0, sizeof resp);
1416         resp.base.cq_handle = obj->uobject.id;
1417         resp.base.cqe       = cq->cqe;
1418
1419         resp.response_length = offsetof(typeof(resp), response_length) +
1420                 sizeof(resp.response_length);
1421
1422         ret = cb(file, obj, &resp, ucore, context);
1423         if (ret)
1424                 goto err_cb;
1425
1426         mutex_lock(&file->mutex);
1427         list_add_tail(&obj->uobject.list, &file->ucontext->cq_list);
1428         mutex_unlock(&file->mutex);
1429
1430         obj->uobject.live = 1;
1431
1432         up_write(&obj->uobject.mutex);
1433
1434         return obj;
1435
1436 err_cb:
1437         idr_remove_uobj(&ib_uverbs_cq_idr, &obj->uobject);
1438
1439 err_free:
1440         ib_destroy_cq(cq);
1441
1442 err_file:
1443         if (ev_file)
1444                 ib_uverbs_release_ucq(file, ev_file, obj);
1445
1446 err:
1447         put_uobj_write(&obj->uobject);
1448
1449         return ERR_PTR(ret);
1450 }
1451
1452 static int ib_uverbs_create_cq_cb(struct ib_uverbs_file *file,
1453                                   struct ib_ucq_object *obj,
1454                                   struct ib_uverbs_ex_create_cq_resp *resp,
1455                                   struct ib_udata *ucore, void *context)
1456 {
1457         if (ib_copy_to_udata(ucore, &resp->base, sizeof(resp->base)))
1458                 return -EFAULT;
1459
1460         return 0;
1461 }
1462
1463 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
1464                             struct ib_device *ib_dev,
1465                             const char __user *buf, int in_len,
1466                             int out_len)
1467 {
1468         struct ib_uverbs_create_cq      cmd;
1469         struct ib_uverbs_ex_create_cq   cmd_ex;
1470         struct ib_uverbs_create_cq_resp resp;
1471         struct ib_udata                 ucore;
1472         struct ib_udata                 uhw;
1473         struct ib_ucq_object           *obj;
1474
1475         if (out_len < sizeof(resp))
1476                 return -ENOSPC;
1477
1478         if (copy_from_user(&cmd, buf, sizeof(cmd)))
1479                 return -EFAULT;
1480
1481         INIT_UDATA(&ucore, buf, cmd.response, sizeof(cmd), sizeof(resp));
1482
1483         INIT_UDATA(&uhw, buf + sizeof(cmd),
1484                    (unsigned long)cmd.response + sizeof(resp),
1485                    in_len - sizeof(cmd), out_len - sizeof(resp));
1486
1487         memset(&cmd_ex, 0, sizeof(cmd_ex));
1488         cmd_ex.user_handle = cmd.user_handle;
1489         cmd_ex.cqe = cmd.cqe;
1490         cmd_ex.comp_vector = cmd.comp_vector;
1491         cmd_ex.comp_channel = cmd.comp_channel;
1492
1493         obj = create_cq(file, ib_dev, &ucore, &uhw, &cmd_ex,
1494                         offsetof(typeof(cmd_ex), comp_channel) +
1495                         sizeof(cmd.comp_channel), ib_uverbs_create_cq_cb,
1496                         NULL);
1497
1498         if (IS_ERR(obj))
1499                 return PTR_ERR(obj);
1500
1501         return in_len;
1502 }
1503
1504 static int ib_uverbs_ex_create_cq_cb(struct ib_uverbs_file *file,
1505                                      struct ib_ucq_object *obj,
1506                                      struct ib_uverbs_ex_create_cq_resp *resp,
1507                                      struct ib_udata *ucore, void *context)
1508 {
1509         if (ib_copy_to_udata(ucore, resp, resp->response_length))
1510                 return -EFAULT;
1511
1512         return 0;
1513 }
1514
1515 int ib_uverbs_ex_create_cq(struct ib_uverbs_file *file,
1516                          struct ib_device *ib_dev,
1517                            struct ib_udata *ucore,
1518                            struct ib_udata *uhw)
1519 {
1520         struct ib_uverbs_ex_create_cq_resp resp;
1521         struct ib_uverbs_ex_create_cq  cmd;
1522         struct ib_ucq_object           *obj;
1523         int err;
1524
1525         if (ucore->inlen < sizeof(cmd))
1526                 return -EINVAL;
1527
1528         err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
1529         if (err)
1530                 return err;
1531
1532         if (cmd.comp_mask)
1533                 return -EINVAL;
1534
1535         if (cmd.reserved)
1536                 return -EINVAL;
1537
1538         if (ucore->outlen < (offsetof(typeof(resp), response_length) +
1539                              sizeof(resp.response_length)))
1540                 return -ENOSPC;
1541
1542         obj = create_cq(file, ib_dev, ucore, uhw, &cmd,
1543                         min(ucore->inlen, sizeof(cmd)),
1544                         ib_uverbs_ex_create_cq_cb, NULL);
1545
1546         if (IS_ERR(obj))
1547                 return PTR_ERR(obj);
1548
1549         return 0;
1550 }
1551
1552 ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
1553                             struct ib_device *ib_dev,
1554                             const char __user *buf, int in_len,
1555                             int out_len)
1556 {
1557         struct ib_uverbs_resize_cq      cmd;
1558         struct ib_uverbs_resize_cq_resp resp;
1559         struct ib_udata                 udata;
1560         struct ib_cq                    *cq;
1561         int                             ret = -EINVAL;
1562
1563         if (copy_from_user(&cmd, buf, sizeof cmd))
1564                 return -EFAULT;
1565
1566         INIT_UDATA(&udata, buf + sizeof cmd,
1567                    (unsigned long) cmd.response + sizeof resp,
1568                    in_len - sizeof cmd, out_len - sizeof resp);
1569
1570         cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1571         if (!cq)
1572                 return -EINVAL;
1573
1574         ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
1575         if (ret)
1576                 goto out;
1577
1578         resp.cqe = cq->cqe;
1579
1580         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1581                          &resp, sizeof resp.cqe))
1582                 ret = -EFAULT;
1583
1584 out:
1585         put_cq_read(cq);
1586
1587         return ret ? ret : in_len;
1588 }
1589
1590 static int copy_wc_to_user(void __user *dest, struct ib_wc *wc)
1591 {
1592         struct ib_uverbs_wc tmp;
1593
1594         tmp.wr_id               = wc->wr_id;
1595         tmp.status              = wc->status;
1596         tmp.opcode              = wc->opcode;
1597         tmp.vendor_err          = wc->vendor_err;
1598         tmp.byte_len            = wc->byte_len;
1599         tmp.ex.imm_data         = (__u32 __force) wc->ex.imm_data;
1600         tmp.qp_num              = wc->qp->qp_num;
1601         tmp.src_qp              = wc->src_qp;
1602         tmp.wc_flags            = wc->wc_flags;
1603         tmp.pkey_index          = wc->pkey_index;
1604         tmp.slid                = wc->slid;
1605         tmp.sl                  = wc->sl;
1606         tmp.dlid_path_bits      = wc->dlid_path_bits;
1607         tmp.port_num            = wc->port_num;
1608         tmp.reserved            = 0;
1609
1610         if (copy_to_user(dest, &tmp, sizeof tmp))
1611                 return -EFAULT;
1612
1613         return 0;
1614 }
1615
1616 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
1617                           struct ib_device *ib_dev,
1618                           const char __user *buf, int in_len,
1619                           int out_len)
1620 {
1621         struct ib_uverbs_poll_cq       cmd;
1622         struct ib_uverbs_poll_cq_resp  resp;
1623         u8 __user                     *header_ptr;
1624         u8 __user                     *data_ptr;
1625         struct ib_cq                  *cq;
1626         struct ib_wc                   wc;
1627         int                            ret;
1628
1629         if (copy_from_user(&cmd, buf, sizeof cmd))
1630                 return -EFAULT;
1631
1632         cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1633         if (!cq)
1634                 return -EINVAL;
1635
1636         /* we copy a struct ib_uverbs_poll_cq_resp to user space */
1637         header_ptr = (void __user *)(unsigned long) cmd.response;
1638         data_ptr = header_ptr + sizeof resp;
1639
1640         memset(&resp, 0, sizeof resp);
1641         while (resp.count < cmd.ne) {
1642                 ret = ib_poll_cq(cq, 1, &wc);
1643                 if (ret < 0)
1644                         goto out_put;
1645                 if (!ret)
1646                         break;
1647
1648                 ret = copy_wc_to_user(data_ptr, &wc);
1649                 if (ret)
1650                         goto out_put;
1651
1652                 data_ptr += sizeof(struct ib_uverbs_wc);
1653                 ++resp.count;
1654         }
1655
1656         if (copy_to_user(header_ptr, &resp, sizeof resp)) {
1657                 ret = -EFAULT;
1658                 goto out_put;
1659         }
1660
1661         ret = in_len;
1662
1663 out_put:
1664         put_cq_read(cq);
1665         return ret;
1666 }
1667
1668 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
1669                                 struct ib_device *ib_dev,
1670                                 const char __user *buf, int in_len,
1671                                 int out_len)
1672 {
1673         struct ib_uverbs_req_notify_cq cmd;
1674         struct ib_cq                  *cq;
1675
1676         if (copy_from_user(&cmd, buf, sizeof cmd))
1677                 return -EFAULT;
1678
1679         cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1680         if (!cq)
1681                 return -EINVAL;
1682
1683         ib_req_notify_cq(cq, cmd.solicited_only ?
1684                          IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
1685
1686         put_cq_read(cq);
1687
1688         return in_len;
1689 }
1690
1691 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
1692                              struct ib_device *ib_dev,
1693                              const char __user *buf, int in_len,
1694                              int out_len)
1695 {
1696         struct ib_uverbs_destroy_cq      cmd;
1697         struct ib_uverbs_destroy_cq_resp resp;
1698         struct ib_uobject               *uobj;
1699         struct ib_cq                    *cq;
1700         struct ib_ucq_object            *obj;
1701         struct ib_uverbs_event_file     *ev_file;
1702         int                              ret = -EINVAL;
1703
1704         if (copy_from_user(&cmd, buf, sizeof cmd))
1705                 return -EFAULT;
1706
1707         uobj = idr_write_uobj(&ib_uverbs_cq_idr, cmd.cq_handle, file->ucontext);
1708         if (!uobj)
1709                 return -EINVAL;
1710         cq      = uobj->object;
1711         ev_file = cq->cq_context;
1712         obj     = container_of(cq->uobject, struct ib_ucq_object, uobject);
1713
1714         ret = ib_destroy_cq(cq);
1715         if (!ret)
1716                 uobj->live = 0;
1717
1718         put_uobj_write(uobj);
1719
1720         if (ret)
1721                 return ret;
1722
1723         idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
1724
1725         mutex_lock(&file->mutex);
1726         list_del(&uobj->list);
1727         mutex_unlock(&file->mutex);
1728
1729         ib_uverbs_release_ucq(file, ev_file, obj);
1730
1731         memset(&resp, 0, sizeof resp);
1732         resp.comp_events_reported  = obj->comp_events_reported;
1733         resp.async_events_reported = obj->async_events_reported;
1734
1735         put_uobj(uobj);
1736
1737         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1738                          &resp, sizeof resp))
1739                 return -EFAULT;
1740
1741         return in_len;
1742 }
1743
1744 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1745                             struct ib_device *ib_dev,
1746                             const char __user *buf, int in_len,
1747                             int out_len)
1748 {
1749         struct ib_uverbs_create_qp      cmd;
1750         struct ib_uverbs_create_qp_resp resp;
1751         struct ib_udata                 udata;
1752         struct ib_uqp_object           *obj;
1753         struct ib_device               *device;
1754         struct ib_pd                   *pd = NULL;
1755         struct ib_xrcd                 *xrcd = NULL;
1756         struct ib_uobject              *uninitialized_var(xrcd_uobj);
1757         struct ib_cq                   *scq = NULL, *rcq = NULL;
1758         struct ib_srq                  *srq = NULL;
1759         struct ib_qp                   *qp;
1760         struct ib_qp_init_attr          attr;
1761         int ret;
1762
1763         if (out_len < sizeof resp)
1764                 return -ENOSPC;
1765
1766         if (copy_from_user(&cmd, buf, sizeof cmd))
1767                 return -EFAULT;
1768
1769         if (cmd.qp_type == IB_QPT_RAW_PACKET && !capable(CAP_NET_RAW))
1770                 return -EPERM;
1771
1772         INIT_UDATA(&udata, buf + sizeof cmd,
1773                    (unsigned long) cmd.response + sizeof resp,
1774                    in_len - sizeof cmd, out_len - sizeof resp);
1775
1776         obj = kzalloc(sizeof *obj, GFP_KERNEL);
1777         if (!obj)
1778                 return -ENOMEM;
1779
1780         init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_class);
1781         down_write(&obj->uevent.uobject.mutex);
1782
1783         if (cmd.qp_type == IB_QPT_XRC_TGT) {
1784                 xrcd = idr_read_xrcd(cmd.pd_handle, file->ucontext, &xrcd_uobj);
1785                 if (!xrcd) {
1786                         ret = -EINVAL;
1787                         goto err_put;
1788                 }
1789                 device = xrcd->device;
1790         } else {
1791                 if (cmd.qp_type == IB_QPT_XRC_INI) {
1792                         cmd.max_recv_wr = cmd.max_recv_sge = 0;
1793                 } else {
1794                         if (cmd.is_srq) {
1795                                 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
1796                                 if (!srq || srq->srq_type != IB_SRQT_BASIC) {
1797                                         ret = -EINVAL;
1798                                         goto err_put;
1799                                 }
1800                         }
1801
1802                         if (cmd.recv_cq_handle != cmd.send_cq_handle) {
1803                                 rcq = idr_read_cq(cmd.recv_cq_handle, file->ucontext, 0);
1804                                 if (!rcq) {
1805                                         ret = -EINVAL;
1806                                         goto err_put;
1807                                 }
1808                         }
1809                 }
1810
1811                 scq = idr_read_cq(cmd.send_cq_handle, file->ucontext, !!rcq);
1812                 rcq = rcq ?: scq;
1813                 pd  = idr_read_pd(cmd.pd_handle, file->ucontext);
1814                 if (!pd || !scq) {
1815                         ret = -EINVAL;
1816                         goto err_put;
1817                 }
1818
1819                 device = pd->device;
1820         }
1821
1822         attr.event_handler = ib_uverbs_qp_event_handler;
1823         attr.qp_context    = file;
1824         attr.send_cq       = scq;
1825         attr.recv_cq       = rcq;
1826         attr.srq           = srq;
1827         attr.xrcd          = xrcd;
1828         attr.sq_sig_type   = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
1829         attr.qp_type       = cmd.qp_type;
1830         attr.create_flags  = 0;
1831
1832         attr.cap.max_send_wr     = cmd.max_send_wr;
1833         attr.cap.max_recv_wr     = cmd.max_recv_wr;
1834         attr.cap.max_send_sge    = cmd.max_send_sge;
1835         attr.cap.max_recv_sge    = cmd.max_recv_sge;
1836         attr.cap.max_inline_data = cmd.max_inline_data;
1837
1838         obj->uevent.events_reported     = 0;
1839         INIT_LIST_HEAD(&obj->uevent.event_list);
1840         INIT_LIST_HEAD(&obj->mcast_list);
1841
1842         if (cmd.qp_type == IB_QPT_XRC_TGT)
1843                 qp = ib_create_qp(pd, &attr);
1844         else
1845                 qp = device->create_qp(pd, &attr, &udata);
1846
1847         if (IS_ERR(qp)) {
1848                 ret = PTR_ERR(qp);
1849                 goto err_put;
1850         }
1851
1852         if (cmd.qp_type != IB_QPT_XRC_TGT) {
1853                 qp->real_qp       = qp;
1854                 qp->device        = device;
1855                 qp->pd            = pd;
1856                 qp->send_cq       = attr.send_cq;
1857                 qp->recv_cq       = attr.recv_cq;
1858                 qp->srq           = attr.srq;
1859                 qp->event_handler = attr.event_handler;
1860                 qp->qp_context    = attr.qp_context;
1861                 qp->qp_type       = attr.qp_type;
1862                 atomic_set(&qp->usecnt, 0);
1863                 atomic_inc(&pd->usecnt);
1864                 atomic_inc(&attr.send_cq->usecnt);
1865                 if (attr.recv_cq)
1866                         atomic_inc(&attr.recv_cq->usecnt);
1867                 if (attr.srq)
1868                         atomic_inc(&attr.srq->usecnt);
1869         }
1870         qp->uobject = &obj->uevent.uobject;
1871
1872         obj->uevent.uobject.object = qp;
1873         ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1874         if (ret)
1875                 goto err_destroy;
1876
1877         memset(&resp, 0, sizeof resp);
1878         resp.qpn             = qp->qp_num;
1879         resp.qp_handle       = obj->uevent.uobject.id;
1880         resp.max_recv_sge    = attr.cap.max_recv_sge;
1881         resp.max_send_sge    = attr.cap.max_send_sge;
1882         resp.max_recv_wr     = attr.cap.max_recv_wr;
1883         resp.max_send_wr     = attr.cap.max_send_wr;
1884         resp.max_inline_data = attr.cap.max_inline_data;
1885
1886         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1887                          &resp, sizeof resp)) {
1888                 ret = -EFAULT;
1889                 goto err_copy;
1890         }
1891
1892         if (xrcd) {
1893                 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object,
1894                                           uobject);
1895                 atomic_inc(&obj->uxrcd->refcnt);
1896                 put_xrcd_read(xrcd_uobj);
1897         }
1898
1899         if (pd)
1900                 put_pd_read(pd);
1901         if (scq)
1902                 put_cq_read(scq);
1903         if (rcq && rcq != scq)
1904                 put_cq_read(rcq);
1905         if (srq)
1906                 put_srq_read(srq);
1907
1908         mutex_lock(&file->mutex);
1909         list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1910         mutex_unlock(&file->mutex);
1911
1912         obj->uevent.uobject.live = 1;
1913
1914         up_write(&obj->uevent.uobject.mutex);
1915
1916         return in_len;
1917
1918 err_copy:
1919         idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1920
1921 err_destroy:
1922         ib_destroy_qp(qp);
1923
1924 err_put:
1925         if (xrcd)
1926                 put_xrcd_read(xrcd_uobj);
1927         if (pd)
1928                 put_pd_read(pd);
1929         if (scq)
1930                 put_cq_read(scq);
1931         if (rcq && rcq != scq)
1932                 put_cq_read(rcq);
1933         if (srq)
1934                 put_srq_read(srq);
1935
1936         put_uobj_write(&obj->uevent.uobject);
1937         return ret;
1938 }
1939
1940 ssize_t ib_uverbs_open_qp(struct ib_uverbs_file *file,
1941                           struct ib_device *ib_dev,
1942                           const char __user *buf, int in_len, int out_len)
1943 {
1944         struct ib_uverbs_open_qp        cmd;
1945         struct ib_uverbs_create_qp_resp resp;
1946         struct ib_udata                 udata;
1947         struct ib_uqp_object           *obj;
1948         struct ib_xrcd                 *xrcd;
1949         struct ib_uobject              *uninitialized_var(xrcd_uobj);
1950         struct ib_qp                   *qp;
1951         struct ib_qp_open_attr          attr;
1952         int ret;
1953
1954         if (out_len < sizeof resp)
1955                 return -ENOSPC;
1956
1957         if (copy_from_user(&cmd, buf, sizeof cmd))
1958                 return -EFAULT;
1959
1960         INIT_UDATA(&udata, buf + sizeof cmd,
1961                    (unsigned long) cmd.response + sizeof resp,
1962                    in_len - sizeof cmd, out_len - sizeof resp);
1963
1964         obj = kmalloc(sizeof *obj, GFP_KERNEL);
1965         if (!obj)
1966                 return -ENOMEM;
1967
1968         init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_class);
1969         down_write(&obj->uevent.uobject.mutex);
1970
1971         xrcd = idr_read_xrcd(cmd.pd_handle, file->ucontext, &xrcd_uobj);
1972         if (!xrcd) {
1973                 ret = -EINVAL;
1974                 goto err_put;
1975         }
1976
1977         attr.event_handler = ib_uverbs_qp_event_handler;
1978         attr.qp_context    = file;
1979         attr.qp_num        = cmd.qpn;
1980         attr.qp_type       = cmd.qp_type;
1981
1982         obj->uevent.events_reported = 0;
1983         INIT_LIST_HEAD(&obj->uevent.event_list);
1984         INIT_LIST_HEAD(&obj->mcast_list);
1985
1986         qp = ib_open_qp(xrcd, &attr);
1987         if (IS_ERR(qp)) {
1988                 ret = PTR_ERR(qp);
1989                 goto err_put;
1990         }
1991
1992         qp->uobject = &obj->uevent.uobject;
1993
1994         obj->uevent.uobject.object = qp;
1995         ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1996         if (ret)
1997                 goto err_destroy;
1998
1999         memset(&resp, 0, sizeof resp);
2000         resp.qpn       = qp->qp_num;
2001         resp.qp_handle = obj->uevent.uobject.id;
2002
2003         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2004                          &resp, sizeof resp)) {
2005                 ret = -EFAULT;
2006                 goto err_remove;
2007         }
2008
2009         obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
2010         atomic_inc(&obj->uxrcd->refcnt);
2011         put_xrcd_read(xrcd_uobj);
2012
2013         mutex_lock(&file->mutex);
2014         list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
2015         mutex_unlock(&file->mutex);
2016
2017         obj->uevent.uobject.live = 1;
2018
2019         up_write(&obj->uevent.uobject.mutex);
2020
2021         return in_len;
2022
2023 err_remove:
2024         idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
2025
2026 err_destroy:
2027         ib_destroy_qp(qp);
2028
2029 err_put:
2030         put_xrcd_read(xrcd_uobj);
2031         put_uobj_write(&obj->uevent.uobject);
2032         return ret;
2033 }
2034
2035 ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
2036                            struct ib_device *ib_dev,
2037                            const char __user *buf, int in_len,
2038                            int out_len)
2039 {
2040         struct ib_uverbs_query_qp      cmd;
2041         struct ib_uverbs_query_qp_resp resp;
2042         struct ib_qp                   *qp;
2043         struct ib_qp_attr              *attr;
2044         struct ib_qp_init_attr         *init_attr;
2045         int                            ret;
2046
2047         if (copy_from_user(&cmd, buf, sizeof cmd))
2048                 return -EFAULT;
2049
2050         attr      = kmalloc(sizeof *attr, GFP_KERNEL);
2051         init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
2052         if (!attr || !init_attr) {
2053                 ret = -ENOMEM;
2054                 goto out;
2055         }
2056
2057         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2058         if (!qp) {
2059                 ret = -EINVAL;
2060                 goto out;
2061         }
2062
2063         ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
2064
2065         put_qp_read(qp);
2066
2067         if (ret)
2068                 goto out;
2069
2070         memset(&resp, 0, sizeof resp);
2071
2072         resp.qp_state               = attr->qp_state;
2073         resp.cur_qp_state           = attr->cur_qp_state;
2074         resp.path_mtu               = attr->path_mtu;
2075         resp.path_mig_state         = attr->path_mig_state;
2076         resp.qkey                   = attr->qkey;
2077         resp.rq_psn                 = attr->rq_psn;
2078         resp.sq_psn                 = attr->sq_psn;
2079         resp.dest_qp_num            = attr->dest_qp_num;
2080         resp.qp_access_flags        = attr->qp_access_flags;
2081         resp.pkey_index             = attr->pkey_index;
2082         resp.alt_pkey_index         = attr->alt_pkey_index;
2083         resp.sq_draining            = attr->sq_draining;
2084         resp.max_rd_atomic          = attr->max_rd_atomic;
2085         resp.max_dest_rd_atomic     = attr->max_dest_rd_atomic;
2086         resp.min_rnr_timer          = attr->min_rnr_timer;
2087         resp.port_num               = attr->port_num;
2088         resp.timeout                = attr->timeout;
2089         resp.retry_cnt              = attr->retry_cnt;
2090         resp.rnr_retry              = attr->rnr_retry;
2091         resp.alt_port_num           = attr->alt_port_num;
2092         resp.alt_timeout            = attr->alt_timeout;
2093
2094         memcpy(resp.dest.dgid, attr->ah_attr.grh.dgid.raw, 16);
2095         resp.dest.flow_label        = attr->ah_attr.grh.flow_label;
2096         resp.dest.sgid_index        = attr->ah_attr.grh.sgid_index;
2097         resp.dest.hop_limit         = attr->ah_attr.grh.hop_limit;
2098         resp.dest.traffic_class     = attr->ah_attr.grh.traffic_class;
2099         resp.dest.dlid              = attr->ah_attr.dlid;
2100         resp.dest.sl                = attr->ah_attr.sl;
2101         resp.dest.src_path_bits     = attr->ah_attr.src_path_bits;
2102         resp.dest.static_rate       = attr->ah_attr.static_rate;
2103         resp.dest.is_global         = !!(attr->ah_attr.ah_flags & IB_AH_GRH);
2104         resp.dest.port_num          = attr->ah_attr.port_num;
2105
2106         memcpy(resp.alt_dest.dgid, attr->alt_ah_attr.grh.dgid.raw, 16);
2107         resp.alt_dest.flow_label    = attr->alt_ah_attr.grh.flow_label;
2108         resp.alt_dest.sgid_index    = attr->alt_ah_attr.grh.sgid_index;
2109         resp.alt_dest.hop_limit     = attr->alt_ah_attr.grh.hop_limit;
2110         resp.alt_dest.traffic_class = attr->alt_ah_attr.grh.traffic_class;
2111         resp.alt_dest.dlid          = attr->alt_ah_attr.dlid;
2112         resp.alt_dest.sl            = attr->alt_ah_attr.sl;
2113         resp.alt_dest.src_path_bits = attr->alt_ah_attr.src_path_bits;
2114         resp.alt_dest.static_rate   = attr->alt_ah_attr.static_rate;
2115         resp.alt_dest.is_global     = !!(attr->alt_ah_attr.ah_flags & IB_AH_GRH);
2116         resp.alt_dest.port_num      = attr->alt_ah_attr.port_num;
2117
2118         resp.max_send_wr            = init_attr->cap.max_send_wr;
2119         resp.max_recv_wr            = init_attr->cap.max_recv_wr;
2120         resp.max_send_sge           = init_attr->cap.max_send_sge;
2121         resp.max_recv_sge           = init_attr->cap.max_recv_sge;
2122         resp.max_inline_data        = init_attr->cap.max_inline_data;
2123         resp.sq_sig_all             = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
2124
2125         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2126                          &resp, sizeof resp))
2127                 ret = -EFAULT;
2128
2129 out:
2130         kfree(attr);
2131         kfree(init_attr);
2132
2133         return ret ? ret : in_len;
2134 }
2135
2136 /* Remove ignored fields set in the attribute mask */
2137 static int modify_qp_mask(enum ib_qp_type qp_type, int mask)
2138 {
2139         switch (qp_type) {
2140         case IB_QPT_XRC_INI:
2141                 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER);
2142         case IB_QPT_XRC_TGT:
2143                 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT |
2144                                 IB_QP_RNR_RETRY);
2145         default:
2146                 return mask;
2147         }
2148 }
2149
2150 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
2151                             struct ib_device *ib_dev,
2152                             const char __user *buf, int in_len,
2153                             int out_len)
2154 {
2155         struct ib_uverbs_modify_qp cmd;
2156         struct ib_udata            udata;
2157         struct ib_qp              *qp;
2158         struct ib_qp_attr         *attr;
2159         int                        ret;
2160
2161         if (copy_from_user(&cmd, buf, sizeof cmd))
2162                 return -EFAULT;
2163
2164         INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
2165                    out_len);
2166
2167         attr = kmalloc(sizeof *attr, GFP_KERNEL);
2168         if (!attr)
2169                 return -ENOMEM;
2170
2171         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2172         if (!qp) {
2173                 ret = -EINVAL;
2174                 goto out;
2175         }
2176
2177         attr->qp_state            = cmd.qp_state;
2178         attr->cur_qp_state        = cmd.cur_qp_state;
2179         attr->path_mtu            = cmd.path_mtu;
2180         attr->path_mig_state      = cmd.path_mig_state;
2181         attr->qkey                = cmd.qkey;
2182         attr->rq_psn              = cmd.rq_psn;
2183         attr->sq_psn              = cmd.sq_psn;
2184         attr->dest_qp_num         = cmd.dest_qp_num;
2185         attr->qp_access_flags     = cmd.qp_access_flags;
2186         attr->pkey_index          = cmd.pkey_index;
2187         attr->alt_pkey_index      = cmd.alt_pkey_index;
2188         attr->en_sqd_async_notify = cmd.en_sqd_async_notify;
2189         attr->max_rd_atomic       = cmd.max_rd_atomic;
2190         attr->max_dest_rd_atomic  = cmd.max_dest_rd_atomic;
2191         attr->min_rnr_timer       = cmd.min_rnr_timer;
2192         attr->port_num            = cmd.port_num;
2193         attr->timeout             = cmd.timeout;
2194         attr->retry_cnt           = cmd.retry_cnt;
2195         attr->rnr_retry           = cmd.rnr_retry;
2196         attr->alt_port_num        = cmd.alt_port_num;
2197         attr->alt_timeout         = cmd.alt_timeout;
2198
2199         memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16);
2200         attr->ah_attr.grh.flow_label        = cmd.dest.flow_label;
2201         attr->ah_attr.grh.sgid_index        = cmd.dest.sgid_index;
2202         attr->ah_attr.grh.hop_limit         = cmd.dest.hop_limit;
2203         attr->ah_attr.grh.traffic_class     = cmd.dest.traffic_class;
2204         attr->ah_attr.dlid                  = cmd.dest.dlid;
2205         attr->ah_attr.sl                    = cmd.dest.sl;
2206         attr->ah_attr.src_path_bits         = cmd.dest.src_path_bits;
2207         attr->ah_attr.static_rate           = cmd.dest.static_rate;
2208         attr->ah_attr.ah_flags              = cmd.dest.is_global ? IB_AH_GRH : 0;
2209         attr->ah_attr.port_num              = cmd.dest.port_num;
2210
2211         memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16);
2212         attr->alt_ah_attr.grh.flow_label    = cmd.alt_dest.flow_label;
2213         attr->alt_ah_attr.grh.sgid_index    = cmd.alt_dest.sgid_index;
2214         attr->alt_ah_attr.grh.hop_limit     = cmd.alt_dest.hop_limit;
2215         attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class;
2216         attr->alt_ah_attr.dlid              = cmd.alt_dest.dlid;
2217         attr->alt_ah_attr.sl                = cmd.alt_dest.sl;
2218         attr->alt_ah_attr.src_path_bits     = cmd.alt_dest.src_path_bits;
2219         attr->alt_ah_attr.static_rate       = cmd.alt_dest.static_rate;
2220         attr->alt_ah_attr.ah_flags          = cmd.alt_dest.is_global ? IB_AH_GRH : 0;
2221         attr->alt_ah_attr.port_num          = cmd.alt_dest.port_num;
2222
2223         if (qp->real_qp == qp) {
2224                 ret = ib_resolve_eth_l2_attrs(qp, attr, &cmd.attr_mask);
2225                 if (ret)
2226                         goto release_qp;
2227                 ret = qp->device->modify_qp(qp, attr,
2228                         modify_qp_mask(qp->qp_type, cmd.attr_mask), &udata);
2229         } else {
2230                 ret = ib_modify_qp(qp, attr, modify_qp_mask(qp->qp_type, cmd.attr_mask));
2231         }
2232
2233         if (ret)
2234                 goto release_qp;
2235
2236         ret = in_len;
2237
2238 release_qp:
2239         put_qp_read(qp);
2240
2241 out:
2242         kfree(attr);
2243
2244         return ret;
2245 }
2246
2247 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
2248                              struct ib_device *ib_dev,
2249                              const char __user *buf, int in_len,
2250                              int out_len)
2251 {
2252         struct ib_uverbs_destroy_qp      cmd;
2253         struct ib_uverbs_destroy_qp_resp resp;
2254         struct ib_uobject               *uobj;
2255         struct ib_qp                    *qp;
2256         struct ib_uqp_object            *obj;
2257         int                              ret = -EINVAL;
2258
2259         if (copy_from_user(&cmd, buf, sizeof cmd))
2260                 return -EFAULT;
2261
2262         memset(&resp, 0, sizeof resp);
2263
2264         uobj = idr_write_uobj(&ib_uverbs_qp_idr, cmd.qp_handle, file->ucontext);
2265         if (!uobj)
2266                 return -EINVAL;
2267         qp  = uobj->object;
2268         obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
2269
2270         if (!list_empty(&obj->mcast_list)) {
2271                 put_uobj_write(uobj);
2272                 return -EBUSY;
2273         }
2274
2275         ret = ib_destroy_qp(qp);
2276         if (!ret)
2277                 uobj->live = 0;
2278
2279         put_uobj_write(uobj);
2280
2281         if (ret)
2282                 return ret;
2283
2284         if (obj->uxrcd)
2285                 atomic_dec(&obj->uxrcd->refcnt);
2286
2287         idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
2288
2289         mutex_lock(&file->mutex);
2290         list_del(&uobj->list);
2291         mutex_unlock(&file->mutex);
2292
2293         ib_uverbs_release_uevent(file, &obj->uevent);
2294
2295         resp.events_reported = obj->uevent.events_reported;
2296
2297         put_uobj(uobj);
2298
2299         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2300                          &resp, sizeof resp))
2301                 return -EFAULT;
2302
2303         return in_len;
2304 }
2305
2306 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
2307                             struct ib_device *ib_dev,
2308                             const char __user *buf, int in_len,
2309                             int out_len)
2310 {
2311         struct ib_uverbs_post_send      cmd;
2312         struct ib_uverbs_post_send_resp resp;
2313         struct ib_uverbs_send_wr       *user_wr;
2314         struct ib_send_wr              *wr = NULL, *last, *next, *bad_wr;
2315         struct ib_qp                   *qp;
2316         int                             i, sg_ind;
2317         int                             is_ud;
2318         ssize_t                         ret = -EINVAL;
2319
2320         if (copy_from_user(&cmd, buf, sizeof cmd))
2321                 return -EFAULT;
2322
2323         if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
2324             cmd.sge_count * sizeof (struct ib_uverbs_sge))
2325                 return -EINVAL;
2326
2327         if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
2328                 return -EINVAL;
2329
2330         user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
2331         if (!user_wr)
2332                 return -ENOMEM;
2333
2334         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2335         if (!qp)
2336                 goto out;
2337
2338         is_ud = qp->qp_type == IB_QPT_UD;
2339         sg_ind = 0;
2340         last = NULL;
2341         for (i = 0; i < cmd.wr_count; ++i) {
2342                 if (copy_from_user(user_wr,
2343                                    buf + sizeof cmd + i * cmd.wqe_size,
2344                                    cmd.wqe_size)) {
2345                         ret = -EFAULT;
2346                         goto out_put;
2347                 }
2348
2349                 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
2350                         ret = -EINVAL;
2351                         goto out_put;
2352                 }
2353
2354                 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2355                                user_wr->num_sge * sizeof (struct ib_sge),
2356                                GFP_KERNEL);
2357                 if (!next) {
2358                         ret = -ENOMEM;
2359                         goto out_put;
2360                 }
2361
2362                 if (!last)
2363                         wr = next;
2364                 else
2365                         last->next = next;
2366                 last = next;
2367
2368                 next->next       = NULL;
2369                 next->wr_id      = user_wr->wr_id;
2370                 next->num_sge    = user_wr->num_sge;
2371                 next->opcode     = user_wr->opcode;
2372                 next->send_flags = user_wr->send_flags;
2373
2374                 if (is_ud) {
2375                         next->wr.ud.ah = idr_read_ah(user_wr->wr.ud.ah,
2376                                                      file->ucontext);
2377                         if (!next->wr.ud.ah) {
2378                                 ret = -EINVAL;
2379                                 goto out_put;
2380                         }
2381                         next->wr.ud.remote_qpn  = user_wr->wr.ud.remote_qpn;
2382                         next->wr.ud.remote_qkey = user_wr->wr.ud.remote_qkey;
2383                         if (next->opcode == IB_WR_SEND_WITH_IMM)
2384                                 next->ex.imm_data =
2385                                         (__be32 __force) user_wr->ex.imm_data;
2386                 } else {
2387                         switch (next->opcode) {
2388                         case IB_WR_RDMA_WRITE_WITH_IMM:
2389                                 next->ex.imm_data =
2390                                         (__be32 __force) user_wr->ex.imm_data;
2391                         case IB_WR_RDMA_WRITE:
2392                         case IB_WR_RDMA_READ:
2393                                 next->wr.rdma.remote_addr =
2394                                         user_wr->wr.rdma.remote_addr;
2395                                 next->wr.rdma.rkey        =
2396                                         user_wr->wr.rdma.rkey;
2397                                 break;
2398                         case IB_WR_SEND_WITH_IMM:
2399                                 next->ex.imm_data =
2400                                         (__be32 __force) user_wr->ex.imm_data;
2401                                 break;
2402                         case IB_WR_SEND_WITH_INV:
2403                                 next->ex.invalidate_rkey =
2404                                         user_wr->ex.invalidate_rkey;
2405                                 break;
2406                         case IB_WR_ATOMIC_CMP_AND_SWP:
2407                         case IB_WR_ATOMIC_FETCH_AND_ADD:
2408                                 next->wr.atomic.remote_addr =
2409                                         user_wr->wr.atomic.remote_addr;
2410                                 next->wr.atomic.compare_add =
2411                                         user_wr->wr.atomic.compare_add;
2412                                 next->wr.atomic.swap = user_wr->wr.atomic.swap;
2413                                 next->wr.atomic.rkey = user_wr->wr.atomic.rkey;
2414                                 break;
2415                         default:
2416                                 break;
2417                         }
2418                 }
2419
2420                 if (next->num_sge) {
2421                         next->sg_list = (void *) next +
2422                                 ALIGN(sizeof *next, sizeof (struct ib_sge));
2423                         if (copy_from_user(next->sg_list,
2424                                            buf + sizeof cmd +
2425                                            cmd.wr_count * cmd.wqe_size +
2426                                            sg_ind * sizeof (struct ib_sge),
2427                                            next->num_sge * sizeof (struct ib_sge))) {
2428                                 ret = -EFAULT;
2429                                 goto out_put;
2430                         }
2431                         sg_ind += next->num_sge;
2432                 } else
2433                         next->sg_list = NULL;
2434         }
2435
2436         resp.bad_wr = 0;
2437         ret = qp->device->post_send(qp->real_qp, wr, &bad_wr);
2438         if (ret)
2439                 for (next = wr; next; next = next->next) {
2440                         ++resp.bad_wr;
2441                         if (next == bad_wr)
2442                                 break;
2443                 }
2444
2445         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2446                          &resp, sizeof resp))
2447                 ret = -EFAULT;
2448
2449 out_put:
2450         put_qp_read(qp);
2451
2452         while (wr) {
2453                 if (is_ud && wr->wr.ud.ah)
2454                         put_ah_read(wr->wr.ud.ah);
2455                 next = wr->next;
2456                 kfree(wr);
2457                 wr = next;
2458         }
2459
2460 out:
2461         kfree(user_wr);
2462
2463         return ret ? ret : in_len;
2464 }
2465
2466 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
2467                                                     int in_len,
2468                                                     u32 wr_count,
2469                                                     u32 sge_count,
2470                                                     u32 wqe_size)
2471 {
2472         struct ib_uverbs_recv_wr *user_wr;
2473         struct ib_recv_wr        *wr = NULL, *last, *next;
2474         int                       sg_ind;
2475         int                       i;
2476         int                       ret;
2477
2478         if (in_len < wqe_size * wr_count +
2479             sge_count * sizeof (struct ib_uverbs_sge))
2480                 return ERR_PTR(-EINVAL);
2481
2482         if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
2483                 return ERR_PTR(-EINVAL);
2484
2485         user_wr = kmalloc(wqe_size, GFP_KERNEL);
2486         if (!user_wr)
2487                 return ERR_PTR(-ENOMEM);
2488
2489         sg_ind = 0;
2490         last = NULL;
2491         for (i = 0; i < wr_count; ++i) {
2492                 if (copy_from_user(user_wr, buf + i * wqe_size,
2493                                    wqe_size)) {
2494                         ret = -EFAULT;
2495                         goto err;
2496                 }
2497
2498                 if (user_wr->num_sge + sg_ind > sge_count) {
2499                         ret = -EINVAL;
2500                         goto err;
2501                 }
2502
2503                 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2504                                user_wr->num_sge * sizeof (struct ib_sge),
2505                                GFP_KERNEL);
2506                 if (!next) {
2507                         ret = -ENOMEM;
2508                         goto err;
2509                 }
2510
2511                 if (!last)
2512                         wr = next;
2513                 else
2514                         last->next = next;
2515                 last = next;
2516
2517                 next->next       = NULL;
2518                 next->wr_id      = user_wr->wr_id;
2519                 next->num_sge    = user_wr->num_sge;
2520
2521                 if (next->num_sge) {
2522                         next->sg_list = (void *) next +
2523                                 ALIGN(sizeof *next, sizeof (struct ib_sge));
2524                         if (copy_from_user(next->sg_list,
2525                                            buf + wr_count * wqe_size +
2526                                            sg_ind * sizeof (struct ib_sge),
2527                                            next->num_sge * sizeof (struct ib_sge))) {
2528                                 ret = -EFAULT;
2529                                 goto err;
2530                         }
2531                         sg_ind += next->num_sge;
2532                 } else
2533                         next->sg_list = NULL;
2534         }
2535
2536         kfree(user_wr);
2537         return wr;
2538
2539 err:
2540         kfree(user_wr);
2541
2542         while (wr) {
2543                 next = wr->next;
2544                 kfree(wr);
2545                 wr = next;
2546         }
2547
2548         return ERR_PTR(ret);
2549 }
2550
2551 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
2552                             struct ib_device *ib_dev,
2553                             const char __user *buf, int in_len,
2554                             int out_len)
2555 {
2556         struct ib_uverbs_post_recv      cmd;
2557         struct ib_uverbs_post_recv_resp resp;
2558         struct ib_recv_wr              *wr, *next, *bad_wr;
2559         struct ib_qp                   *qp;
2560         ssize_t                         ret = -EINVAL;
2561
2562         if (copy_from_user(&cmd, buf, sizeof cmd))
2563                 return -EFAULT;
2564
2565         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2566                                        in_len - sizeof cmd, cmd.wr_count,
2567                                        cmd.sge_count, cmd.wqe_size);
2568         if (IS_ERR(wr))
2569                 return PTR_ERR(wr);
2570
2571         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2572         if (!qp)
2573                 goto out;
2574
2575         resp.bad_wr = 0;
2576         ret = qp->device->post_recv(qp->real_qp, wr, &bad_wr);
2577
2578         put_qp_read(qp);
2579
2580         if (ret)
2581                 for (next = wr; next; next = next->next) {
2582                         ++resp.bad_wr;
2583                         if (next == bad_wr)
2584                                 break;
2585                 }
2586
2587         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2588                          &resp, sizeof resp))
2589                 ret = -EFAULT;
2590
2591 out:
2592         while (wr) {
2593                 next = wr->next;
2594                 kfree(wr);
2595                 wr = next;
2596         }
2597
2598         return ret ? ret : in_len;
2599 }
2600
2601 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
2602                                 struct ib_device *ib_dev,
2603                                 const char __user *buf, int in_len,
2604                                 int out_len)
2605 {
2606         struct ib_uverbs_post_srq_recv      cmd;
2607         struct ib_uverbs_post_srq_recv_resp resp;
2608         struct ib_recv_wr                  *wr, *next, *bad_wr;
2609         struct ib_srq                      *srq;
2610         ssize_t                             ret = -EINVAL;
2611
2612         if (copy_from_user(&cmd, buf, sizeof cmd))
2613                 return -EFAULT;
2614
2615         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2616                                        in_len - sizeof cmd, cmd.wr_count,
2617                                        cmd.sge_count, cmd.wqe_size);
2618         if (IS_ERR(wr))
2619                 return PTR_ERR(wr);
2620
2621         srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2622         if (!srq)
2623                 goto out;
2624
2625         resp.bad_wr = 0;
2626         ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
2627
2628         put_srq_read(srq);
2629
2630         if (ret)
2631                 for (next = wr; next; next = next->next) {
2632                         ++resp.bad_wr;
2633                         if (next == bad_wr)
2634                                 break;
2635                 }
2636
2637         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2638                          &resp, sizeof resp))
2639                 ret = -EFAULT;
2640
2641 out:
2642         while (wr) {
2643                 next = wr->next;
2644                 kfree(wr);
2645                 wr = next;
2646         }
2647
2648         return ret ? ret : in_len;
2649 }
2650
2651 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
2652                             struct ib_device *ib_dev,
2653                             const char __user *buf, int in_len,
2654                             int out_len)
2655 {
2656         struct ib_uverbs_create_ah       cmd;
2657         struct ib_uverbs_create_ah_resp  resp;
2658         struct ib_uobject               *uobj;
2659         struct ib_pd                    *pd;
2660         struct ib_ah                    *ah;
2661         struct ib_ah_attr               attr;
2662         int ret;
2663
2664         if (out_len < sizeof resp)
2665                 return -ENOSPC;
2666
2667         if (copy_from_user(&cmd, buf, sizeof cmd))
2668                 return -EFAULT;
2669
2670         uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
2671         if (!uobj)
2672                 return -ENOMEM;
2673
2674         init_uobj(uobj, cmd.user_handle, file->ucontext, &ah_lock_class);
2675         down_write(&uobj->mutex);
2676
2677         pd = idr_read_pd(cmd.pd_handle, file->ucontext);
2678         if (!pd) {
2679                 ret = -EINVAL;
2680                 goto err;
2681         }
2682
2683         attr.dlid              = cmd.attr.dlid;
2684         attr.sl                = cmd.attr.sl;
2685         attr.src_path_bits     = cmd.attr.src_path_bits;
2686         attr.static_rate       = cmd.attr.static_rate;
2687         attr.ah_flags          = cmd.attr.is_global ? IB_AH_GRH : 0;
2688         attr.port_num          = cmd.attr.port_num;
2689         attr.grh.flow_label    = cmd.attr.grh.flow_label;
2690         attr.grh.sgid_index    = cmd.attr.grh.sgid_index;
2691         attr.grh.hop_limit     = cmd.attr.grh.hop_limit;
2692         attr.grh.traffic_class = cmd.attr.grh.traffic_class;
2693         attr.vlan_id           = 0;
2694         memset(&attr.dmac, 0, sizeof(attr.dmac));
2695         memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16);
2696
2697         ah = ib_create_ah(pd, &attr);
2698         if (IS_ERR(ah)) {
2699                 ret = PTR_ERR(ah);
2700                 goto err_put;
2701         }
2702
2703         ah->uobject  = uobj;
2704         uobj->object = ah;
2705
2706         ret = idr_add_uobj(&ib_uverbs_ah_idr, uobj);
2707         if (ret)
2708                 goto err_destroy;
2709
2710         resp.ah_handle = uobj->id;
2711
2712         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2713                          &resp, sizeof resp)) {
2714                 ret = -EFAULT;
2715                 goto err_copy;
2716         }
2717
2718         put_pd_read(pd);
2719
2720         mutex_lock(&file->mutex);
2721         list_add_tail(&uobj->list, &file->ucontext->ah_list);
2722         mutex_unlock(&file->mutex);
2723
2724         uobj->live = 1;
2725
2726         up_write(&uobj->mutex);
2727
2728         return in_len;
2729
2730 err_copy:
2731         idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
2732
2733 err_destroy:
2734         ib_destroy_ah(ah);
2735
2736 err_put:
2737         put_pd_read(pd);
2738
2739 err:
2740         put_uobj_write(uobj);
2741         return ret;
2742 }
2743
2744 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
2745                              struct ib_device *ib_dev,
2746                              const char __user *buf, int in_len, int out_len)
2747 {
2748         struct ib_uverbs_destroy_ah cmd;
2749         struct ib_ah               *ah;
2750         struct ib_uobject          *uobj;
2751         int                         ret;
2752
2753         if (copy_from_user(&cmd, buf, sizeof cmd))
2754                 return -EFAULT;
2755
2756         uobj = idr_write_uobj(&ib_uverbs_ah_idr, cmd.ah_handle, file->ucontext);
2757         if (!uobj)
2758                 return -EINVAL;
2759         ah = uobj->object;
2760
2761         ret = ib_destroy_ah(ah);
2762         if (!ret)
2763                 uobj->live = 0;
2764
2765         put_uobj_write(uobj);
2766
2767         if (ret)
2768                 return ret;
2769
2770         idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
2771
2772         mutex_lock(&file->mutex);
2773         list_del(&uobj->list);
2774         mutex_unlock(&file->mutex);
2775
2776         put_uobj(uobj);
2777
2778         return in_len;
2779 }
2780
2781 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
2782                                struct ib_device *ib_dev,
2783                                const char __user *buf, int in_len,
2784                                int out_len)
2785 {
2786         struct ib_uverbs_attach_mcast cmd;
2787         struct ib_qp                 *qp;
2788         struct ib_uqp_object         *obj;
2789         struct ib_uverbs_mcast_entry *mcast;
2790         int                           ret;
2791
2792         if (copy_from_user(&cmd, buf, sizeof cmd))
2793                 return -EFAULT;
2794
2795         qp = idr_write_qp(cmd.qp_handle, file->ucontext);
2796         if (!qp)
2797                 return -EINVAL;
2798
2799         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2800
2801         list_for_each_entry(mcast, &obj->mcast_list, list)
2802                 if (cmd.mlid == mcast->lid &&
2803                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2804                         ret = 0;
2805                         goto out_put;
2806                 }
2807
2808         mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
2809         if (!mcast) {
2810                 ret = -ENOMEM;
2811                 goto out_put;
2812         }
2813
2814         mcast->lid = cmd.mlid;
2815         memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
2816
2817         ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
2818         if (!ret)
2819                 list_add_tail(&mcast->list, &obj->mcast_list);
2820         else
2821                 kfree(mcast);
2822
2823 out_put:
2824         put_qp_write(qp);
2825
2826         return ret ? ret : in_len;
2827 }
2828
2829 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
2830                                struct ib_device *ib_dev,
2831                                const char __user *buf, int in_len,
2832                                int out_len)
2833 {
2834         struct ib_uverbs_detach_mcast cmd;
2835         struct ib_uqp_object         *obj;
2836         struct ib_qp                 *qp;
2837         struct ib_uverbs_mcast_entry *mcast;
2838         int                           ret = -EINVAL;
2839
2840         if (copy_from_user(&cmd, buf, sizeof cmd))
2841                 return -EFAULT;
2842
2843         qp = idr_write_qp(cmd.qp_handle, file->ucontext);
2844         if (!qp)
2845                 return -EINVAL;
2846
2847         ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
2848         if (ret)
2849                 goto out_put;
2850
2851         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2852
2853         list_for_each_entry(mcast, &obj->mcast_list, list)
2854                 if (cmd.mlid == mcast->lid &&
2855                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2856                         list_del(&mcast->list);
2857                         kfree(mcast);
2858                         break;
2859                 }
2860
2861 out_put:
2862         put_qp_write(qp);
2863
2864         return ret ? ret : in_len;
2865 }
2866
2867 static int kern_spec_to_ib_spec(struct ib_uverbs_flow_spec *kern_spec,
2868                                 union ib_flow_spec *ib_spec)
2869 {
2870         if (kern_spec->reserved)
2871                 return -EINVAL;
2872
2873         ib_spec->type = kern_spec->type;
2874
2875         switch (ib_spec->type) {
2876         case IB_FLOW_SPEC_ETH:
2877                 ib_spec->eth.size = sizeof(struct ib_flow_spec_eth);
2878                 if (ib_spec->eth.size != kern_spec->eth.size)
2879                         return -EINVAL;
2880                 memcpy(&ib_spec->eth.val, &kern_spec->eth.val,
2881                        sizeof(struct ib_flow_eth_filter));
2882                 memcpy(&ib_spec->eth.mask, &kern_spec->eth.mask,
2883                        sizeof(struct ib_flow_eth_filter));
2884                 break;
2885         case IB_FLOW_SPEC_IPV4:
2886                 ib_spec->ipv4.size = sizeof(struct ib_flow_spec_ipv4);
2887                 if (ib_spec->ipv4.size != kern_spec->ipv4.size)
2888                         return -EINVAL;
2889                 memcpy(&ib_spec->ipv4.val, &kern_spec->ipv4.val,
2890                        sizeof(struct ib_flow_ipv4_filter));
2891                 memcpy(&ib_spec->ipv4.mask, &kern_spec->ipv4.mask,
2892                        sizeof(struct ib_flow_ipv4_filter));
2893                 break;
2894         case IB_FLOW_SPEC_TCP:
2895         case IB_FLOW_SPEC_UDP:
2896                 ib_spec->tcp_udp.size = sizeof(struct ib_flow_spec_tcp_udp);
2897                 if (ib_spec->tcp_udp.size != kern_spec->tcp_udp.size)
2898                         return -EINVAL;
2899                 memcpy(&ib_spec->tcp_udp.val, &kern_spec->tcp_udp.val,
2900                        sizeof(struct ib_flow_tcp_udp_filter));
2901                 memcpy(&ib_spec->tcp_udp.mask, &kern_spec->tcp_udp.mask,
2902                        sizeof(struct ib_flow_tcp_udp_filter));
2903                 break;
2904         default:
2905                 return -EINVAL;
2906         }
2907         return 0;
2908 }
2909
2910 int ib_uverbs_ex_create_flow(struct ib_uverbs_file *file,
2911                              struct ib_device *ib_dev,
2912                              struct ib_udata *ucore,
2913                              struct ib_udata *uhw)
2914 {
2915         struct ib_uverbs_create_flow      cmd;
2916         struct ib_uverbs_create_flow_resp resp;
2917         struct ib_uobject                 *uobj;
2918         struct ib_flow                    *flow_id;
2919         struct ib_uverbs_flow_attr        *kern_flow_attr;
2920         struct ib_flow_attr               *flow_attr;
2921         struct ib_qp                      *qp;
2922         int err = 0;
2923         void *kern_spec;
2924         void *ib_spec;
2925         int i;
2926
2927         if (ucore->inlen < sizeof(cmd))
2928                 return -EINVAL;
2929
2930         if (ucore->outlen < sizeof(resp))
2931                 return -ENOSPC;
2932
2933         err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
2934         if (err)
2935                 return err;
2936
2937         ucore->inbuf += sizeof(cmd);
2938         ucore->inlen -= sizeof(cmd);
2939
2940         if (cmd.comp_mask)
2941                 return -EINVAL;
2942
2943         if ((cmd.flow_attr.type == IB_FLOW_ATTR_SNIFFER &&
2944              !capable(CAP_NET_ADMIN)) || !capable(CAP_NET_RAW))
2945                 return -EPERM;
2946
2947         if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS)
2948                 return -EINVAL;
2949
2950         if (cmd.flow_attr.size > ucore->inlen ||
2951             cmd.flow_attr.size >
2952             (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec)))
2953                 return -EINVAL;
2954
2955         if (cmd.flow_attr.reserved[0] ||
2956             cmd.flow_attr.reserved[1])
2957                 return -EINVAL;
2958
2959         if (cmd.flow_attr.num_of_specs) {
2960                 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size,
2961                                          GFP_KERNEL);
2962                 if (!kern_flow_attr)
2963                         return -ENOMEM;
2964
2965                 memcpy(kern_flow_attr, &cmd.flow_attr, sizeof(*kern_flow_attr));
2966                 err = ib_copy_from_udata(kern_flow_attr + 1, ucore,
2967                                          cmd.flow_attr.size);
2968                 if (err)
2969                         goto err_free_attr;
2970         } else {
2971                 kern_flow_attr = &cmd.flow_attr;
2972         }
2973
2974         uobj = kmalloc(sizeof(*uobj), GFP_KERNEL);
2975         if (!uobj) {
2976                 err = -ENOMEM;
2977                 goto err_free_attr;
2978         }
2979         init_uobj(uobj, 0, file->ucontext, &rule_lock_class);
2980         down_write(&uobj->mutex);
2981
2982         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2983         if (!qp) {
2984                 err = -EINVAL;
2985                 goto err_uobj;
2986         }
2987
2988         flow_attr = kmalloc(sizeof(*flow_attr) + cmd.flow_attr.size, GFP_KERNEL);
2989         if (!flow_attr) {
2990                 err = -ENOMEM;
2991                 goto err_put;
2992         }
2993
2994         flow_attr->type = kern_flow_attr->type;
2995         flow_attr->priority = kern_flow_attr->priority;
2996         flow_attr->num_of_specs = kern_flow_attr->num_of_specs;
2997         flow_attr->port = kern_flow_attr->port;
2998         flow_attr->flags = kern_flow_attr->flags;
2999         flow_attr->size = sizeof(*flow_attr);
3000
3001         kern_spec = kern_flow_attr + 1;
3002         ib_spec = flow_attr + 1;
3003         for (i = 0; i < flow_attr->num_of_specs &&
3004              cmd.flow_attr.size > offsetof(struct ib_uverbs_flow_spec, reserved) &&
3005              cmd.flow_attr.size >=
3006              ((struct ib_uverbs_flow_spec *)kern_spec)->size; i++) {
3007                 err = kern_spec_to_ib_spec(kern_spec, ib_spec);
3008                 if (err)
3009                         goto err_free;
3010                 flow_attr->size +=
3011                         ((union ib_flow_spec *) ib_spec)->size;
3012                 cmd.flow_attr.size -= ((struct ib_uverbs_flow_spec *)kern_spec)->size;
3013                 kern_spec += ((struct ib_uverbs_flow_spec *) kern_spec)->size;
3014                 ib_spec += ((union ib_flow_spec *) ib_spec)->size;
3015         }
3016         if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) {
3017                 pr_warn("create flow failed, flow %d: %d bytes left from uverb cmd\n",
3018                         i, cmd.flow_attr.size);
3019                 err = -EINVAL;
3020                 goto err_free;
3021         }
3022         flow_id = ib_create_flow(qp, flow_attr, IB_FLOW_DOMAIN_USER);
3023         if (IS_ERR(flow_id)) {
3024                 err = PTR_ERR(flow_id);
3025                 goto err_free;
3026         }
3027         flow_id->qp = qp;
3028         flow_id->uobject = uobj;
3029         uobj->object = flow_id;
3030
3031         err = idr_add_uobj(&ib_uverbs_rule_idr, uobj);
3032         if (err)
3033                 goto destroy_flow;
3034
3035         memset(&resp, 0, sizeof(resp));
3036         resp.flow_handle = uobj->id;
3037
3038         err = ib_copy_to_udata(ucore,
3039                                &resp, sizeof(resp));
3040         if (err)
3041                 goto err_copy;
3042
3043         put_qp_read(qp);
3044         mutex_lock(&file->mutex);
3045         list_add_tail(&uobj->list, &file->ucontext->rule_list);
3046         mutex_unlock(&file->mutex);
3047
3048         uobj->live = 1;
3049
3050         up_write(&uobj->mutex);
3051         kfree(flow_attr);
3052         if (cmd.flow_attr.num_of_specs)
3053                 kfree(kern_flow_attr);
3054         return 0;
3055 err_copy:
3056         idr_remove_uobj(&ib_uverbs_rule_idr, uobj);
3057 destroy_flow:
3058         ib_destroy_flow(flow_id);
3059 err_free:
3060         kfree(flow_attr);
3061 err_put:
3062         put_qp_read(qp);
3063 err_uobj:
3064         put_uobj_write(uobj);
3065 err_free_attr:
3066         if (cmd.flow_attr.num_of_specs)
3067                 kfree(kern_flow_attr);
3068         return err;
3069 }
3070
3071 int ib_uverbs_ex_destroy_flow(struct ib_uverbs_file *file,
3072                               struct ib_device *ib_dev,
3073                               struct ib_udata *ucore,
3074                               struct ib_udata *uhw)
3075 {
3076         struct ib_uverbs_destroy_flow   cmd;
3077         struct ib_flow                  *flow_id;
3078         struct ib_uobject               *uobj;
3079         int                             ret;
3080
3081         if (ucore->inlen < sizeof(cmd))
3082                 return -EINVAL;
3083
3084         ret = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3085         if (ret)
3086                 return ret;
3087
3088         if (cmd.comp_mask)
3089                 return -EINVAL;
3090
3091         uobj = idr_write_uobj(&ib_uverbs_rule_idr, cmd.flow_handle,
3092                               file->ucontext);
3093         if (!uobj)
3094                 return -EINVAL;
3095         flow_id = uobj->object;
3096
3097         ret = ib_destroy_flow(flow_id);
3098         if (!ret)
3099                 uobj->live = 0;
3100
3101         put_uobj_write(uobj);
3102
3103         idr_remove_uobj(&ib_uverbs_rule_idr, uobj);
3104
3105         mutex_lock(&file->mutex);
3106         list_del(&uobj->list);
3107         mutex_unlock(&file->mutex);
3108
3109         put_uobj(uobj);
3110
3111         return ret;
3112 }
3113
3114 static int __uverbs_create_xsrq(struct ib_uverbs_file *file,
3115                                 struct ib_device *ib_dev,
3116                                 struct ib_uverbs_create_xsrq *cmd,
3117                                 struct ib_udata *udata)
3118 {
3119         struct ib_uverbs_create_srq_resp resp;
3120         struct ib_usrq_object           *obj;
3121         struct ib_pd                    *pd;
3122         struct ib_srq                   *srq;
3123         struct ib_uobject               *uninitialized_var(xrcd_uobj);
3124         struct ib_srq_init_attr          attr;
3125         int ret;
3126
3127         obj = kmalloc(sizeof *obj, GFP_KERNEL);
3128         if (!obj)
3129                 return -ENOMEM;
3130
3131         init_uobj(&obj->uevent.uobject, cmd->user_handle, file->ucontext, &srq_lock_class);
3132         down_write(&obj->uevent.uobject.mutex);
3133
3134         if (cmd->srq_type == IB_SRQT_XRC) {
3135                 attr.ext.xrc.xrcd  = idr_read_xrcd(cmd->xrcd_handle, file->ucontext, &xrcd_uobj);
3136                 if (!attr.ext.xrc.xrcd) {
3137                         ret = -EINVAL;
3138                         goto err;
3139                 }
3140
3141                 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
3142                 atomic_inc(&obj->uxrcd->refcnt);
3143
3144                 attr.ext.xrc.cq  = idr_read_cq(cmd->cq_handle, file->ucontext, 0);
3145                 if (!attr.ext.xrc.cq) {
3146                         ret = -EINVAL;
3147                         goto err_put_xrcd;
3148                 }
3149         }
3150
3151         pd  = idr_read_pd(cmd->pd_handle, file->ucontext);
3152         if (!pd) {
3153                 ret = -EINVAL;
3154                 goto err_put_cq;
3155         }
3156
3157         attr.event_handler  = ib_uverbs_srq_event_handler;
3158         attr.srq_context    = file;
3159         attr.srq_type       = cmd->srq_type;
3160         attr.attr.max_wr    = cmd->max_wr;
3161         attr.attr.max_sge   = cmd->max_sge;
3162         attr.attr.srq_limit = cmd->srq_limit;
3163
3164         obj->uevent.events_reported = 0;
3165         INIT_LIST_HEAD(&obj->uevent.event_list);
3166
3167         srq = pd->device->create_srq(pd, &attr, udata);
3168         if (IS_ERR(srq)) {
3169                 ret = PTR_ERR(srq);
3170                 goto err_put;
3171         }
3172
3173         srq->device        = pd->device;
3174         srq->pd            = pd;
3175         srq->srq_type      = cmd->srq_type;
3176         srq->uobject       = &obj->uevent.uobject;
3177         srq->event_handler = attr.event_handler;
3178         srq->srq_context   = attr.srq_context;
3179
3180         if (cmd->srq_type == IB_SRQT_XRC) {
3181                 srq->ext.xrc.cq   = attr.ext.xrc.cq;
3182                 srq->ext.xrc.xrcd = attr.ext.xrc.xrcd;
3183                 atomic_inc(&attr.ext.xrc.cq->usecnt);
3184                 atomic_inc(&attr.ext.xrc.xrcd->usecnt);
3185         }
3186
3187         atomic_inc(&pd->usecnt);
3188         atomic_set(&srq->usecnt, 0);
3189
3190         obj->uevent.uobject.object = srq;
3191         ret = idr_add_uobj(&ib_uverbs_srq_idr, &obj->uevent.uobject);
3192         if (ret)
3193                 goto err_destroy;
3194
3195         memset(&resp, 0, sizeof resp);
3196         resp.srq_handle = obj->uevent.uobject.id;
3197         resp.max_wr     = attr.attr.max_wr;
3198         resp.max_sge    = attr.attr.max_sge;
3199         if (cmd->srq_type == IB_SRQT_XRC)
3200                 resp.srqn = srq->ext.xrc.srq_num;
3201
3202         if (copy_to_user((void __user *) (unsigned long) cmd->response,
3203                          &resp, sizeof resp)) {
3204                 ret = -EFAULT;
3205                 goto err_copy;
3206         }
3207
3208         if (cmd->srq_type == IB_SRQT_XRC) {
3209                 put_uobj_read(xrcd_uobj);
3210                 put_cq_read(attr.ext.xrc.cq);
3211         }
3212         put_pd_read(pd);
3213
3214         mutex_lock(&file->mutex);
3215         list_add_tail(&obj->uevent.uobject.list, &file->ucontext->srq_list);
3216         mutex_unlock(&file->mutex);
3217
3218         obj->uevent.uobject.live = 1;
3219
3220         up_write(&obj->uevent.uobject.mutex);
3221
3222         return 0;
3223
3224 err_copy:
3225         idr_remove_uobj(&ib_uverbs_srq_idr, &obj->uevent.uobject);
3226
3227 err_destroy:
3228         ib_destroy_srq(srq);
3229
3230 err_put:
3231         put_pd_read(pd);
3232
3233 err_put_cq:
3234         if (cmd->srq_type == IB_SRQT_XRC)
3235                 put_cq_read(attr.ext.xrc.cq);
3236
3237 err_put_xrcd:
3238         if (cmd->srq_type == IB_SRQT_XRC) {
3239                 atomic_dec(&obj->uxrcd->refcnt);
3240                 put_uobj_read(xrcd_uobj);
3241         }
3242
3243 err:
3244         put_uobj_write(&obj->uevent.uobject);
3245         return ret;
3246 }
3247
3248 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
3249                              struct ib_device *ib_dev,
3250                              const char __user *buf, int in_len,
3251                              int out_len)
3252 {
3253         struct ib_uverbs_create_srq      cmd;
3254         struct ib_uverbs_create_xsrq     xcmd;
3255         struct ib_uverbs_create_srq_resp resp;
3256         struct ib_udata                  udata;
3257         int ret;
3258
3259         if (out_len < sizeof resp)
3260                 return -ENOSPC;
3261
3262         if (copy_from_user(&cmd, buf, sizeof cmd))
3263                 return -EFAULT;
3264
3265         xcmd.response    = cmd.response;
3266         xcmd.user_handle = cmd.user_handle;
3267         xcmd.srq_type    = IB_SRQT_BASIC;
3268         xcmd.pd_handle   = cmd.pd_handle;
3269         xcmd.max_wr      = cmd.max_wr;
3270         xcmd.max_sge     = cmd.max_sge;
3271         xcmd.srq_limit   = cmd.srq_limit;
3272
3273         INIT_UDATA(&udata, buf + sizeof cmd,
3274                    (unsigned long) cmd.response + sizeof resp,
3275                    in_len - sizeof cmd, out_len - sizeof resp);
3276
3277         ret = __uverbs_create_xsrq(file, ib_dev, &xcmd, &udata);
3278         if (ret)
3279                 return ret;
3280
3281         return in_len;
3282 }
3283
3284 ssize_t ib_uverbs_create_xsrq(struct ib_uverbs_file *file,
3285                               struct ib_device *ib_dev,
3286                               const char __user *buf, int in_len, int out_len)
3287 {
3288         struct ib_uverbs_create_xsrq     cmd;
3289         struct ib_uverbs_create_srq_resp resp;
3290         struct ib_udata                  udata;
3291         int ret;
3292
3293         if (out_len < sizeof resp)
3294                 return -ENOSPC;
3295
3296         if (copy_from_user(&cmd, buf, sizeof cmd))
3297                 return -EFAULT;
3298
3299         INIT_UDATA(&udata, buf + sizeof cmd,
3300                    (unsigned long) cmd.response + sizeof resp,
3301                    in_len - sizeof cmd, out_len - sizeof resp);
3302
3303         ret = __uverbs_create_xsrq(file, ib_dev, &cmd, &udata);
3304         if (ret)
3305                 return ret;
3306
3307         return in_len;
3308 }
3309
3310 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
3311                              struct ib_device *ib_dev,
3312                              const char __user *buf, int in_len,
3313                              int out_len)
3314 {
3315         struct ib_uverbs_modify_srq cmd;
3316         struct ib_udata             udata;
3317         struct ib_srq              *srq;
3318         struct ib_srq_attr          attr;
3319         int                         ret;
3320
3321         if (copy_from_user(&cmd, buf, sizeof cmd))
3322                 return -EFAULT;
3323
3324         INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
3325                    out_len);
3326
3327         srq = idr_read_srq(cmd.srq_handle, file->ucontext);
3328         if (!srq)
3329                 return -EINVAL;
3330
3331         attr.max_wr    = cmd.max_wr;
3332         attr.srq_limit = cmd.srq_limit;
3333
3334         ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata);
3335
3336         put_srq_read(srq);
3337
3338         return ret ? ret : in_len;
3339 }
3340
3341 ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
3342                             struct ib_device *ib_dev,
3343                             const char __user *buf,
3344                             int in_len, int out_len)
3345 {
3346         struct ib_uverbs_query_srq      cmd;
3347         struct ib_uverbs_query_srq_resp resp;
3348         struct ib_srq_attr              attr;
3349         struct ib_srq                   *srq;
3350         int                             ret;
3351
3352         if (out_len < sizeof resp)
3353                 return -ENOSPC;
3354
3355         if (copy_from_user(&cmd, buf, sizeof cmd))
3356                 return -EFAULT;
3357
3358         srq = idr_read_srq(cmd.srq_handle, file->ucontext);
3359         if (!srq)
3360                 return -EINVAL;
3361
3362         ret = ib_query_srq(srq, &attr);
3363
3364         put_srq_read(srq);
3365
3366         if (ret)
3367                 return ret;
3368
3369         memset(&resp, 0, sizeof resp);
3370
3371         resp.max_wr    = attr.max_wr;
3372         resp.max_sge   = attr.max_sge;
3373         resp.srq_limit = attr.srq_limit;
3374
3375         if (copy_to_user((void __user *) (unsigned long) cmd.response,
3376                          &resp, sizeof resp))
3377                 return -EFAULT;
3378
3379         return in_len;
3380 }
3381
3382 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
3383                               struct ib_device *ib_dev,
3384                               const char __user *buf, int in_len,
3385                               int out_len)
3386 {
3387         struct ib_uverbs_destroy_srq      cmd;
3388         struct ib_uverbs_destroy_srq_resp resp;
3389         struct ib_uobject                *uobj;
3390         struct ib_srq                    *srq;
3391         struct ib_uevent_object          *obj;
3392         int                               ret = -EINVAL;
3393         struct ib_usrq_object            *us;
3394         enum ib_srq_type                  srq_type;
3395
3396         if (copy_from_user(&cmd, buf, sizeof cmd))
3397                 return -EFAULT;
3398
3399         uobj = idr_write_uobj(&ib_uverbs_srq_idr, cmd.srq_handle, file->ucontext);
3400         if (!uobj)
3401                 return -EINVAL;
3402         srq = uobj->object;
3403         obj = container_of(uobj, struct ib_uevent_object, uobject);
3404         srq_type = srq->srq_type;
3405
3406         ret = ib_destroy_srq(srq);
3407         if (!ret)
3408                 uobj->live = 0;
3409
3410         put_uobj_write(uobj);
3411
3412         if (ret)
3413                 return ret;
3414
3415         if (srq_type == IB_SRQT_XRC) {
3416                 us = container_of(obj, struct ib_usrq_object, uevent);
3417                 atomic_dec(&us->uxrcd->refcnt);
3418         }
3419
3420         idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
3421
3422         mutex_lock(&file->mutex);
3423         list_del(&uobj->list);
3424         mutex_unlock(&file->mutex);
3425
3426         ib_uverbs_release_uevent(file, obj);
3427
3428         memset(&resp, 0, sizeof resp);
3429         resp.events_reported = obj->events_reported;
3430
3431         put_uobj(uobj);
3432
3433         if (copy_to_user((void __user *) (unsigned long) cmd.response,
3434                          &resp, sizeof resp))
3435                 ret = -EFAULT;
3436
3437         return ret ? ret : in_len;
3438 }
3439
3440 int ib_uverbs_ex_query_device(struct ib_uverbs_file *file,
3441                               struct ib_device *ib_dev,
3442                               struct ib_udata *ucore,
3443                               struct ib_udata *uhw)
3444 {
3445         struct ib_uverbs_ex_query_device_resp resp;
3446         struct ib_uverbs_ex_query_device  cmd;
3447         struct ib_device_attr attr;
3448         int err;
3449
3450         if (ucore->inlen < sizeof(cmd))
3451                 return -EINVAL;
3452
3453         err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3454         if (err)
3455                 return err;
3456
3457         if (cmd.comp_mask)
3458                 return -EINVAL;
3459
3460         if (cmd.reserved)
3461                 return -EINVAL;
3462
3463         resp.response_length = offsetof(typeof(resp), odp_caps);
3464
3465         if (ucore->outlen < resp.response_length)
3466                 return -ENOSPC;
3467
3468         memset(&attr, 0, sizeof(attr));
3469
3470         err = ib_dev->query_device(ib_dev, &attr, uhw);
3471         if (err)
3472                 return err;
3473
3474         copy_query_dev_fields(file, ib_dev, &resp.base, &attr);
3475         resp.comp_mask = 0;
3476
3477         if (ucore->outlen < resp.response_length + sizeof(resp.odp_caps))
3478                 goto end;
3479
3480 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
3481         resp.odp_caps.general_caps = attr.odp_caps.general_caps;
3482         resp.odp_caps.per_transport_caps.rc_odp_caps =
3483                 attr.odp_caps.per_transport_caps.rc_odp_caps;
3484         resp.odp_caps.per_transport_caps.uc_odp_caps =
3485                 attr.odp_caps.per_transport_caps.uc_odp_caps;
3486         resp.odp_caps.per_transport_caps.ud_odp_caps =
3487                 attr.odp_caps.per_transport_caps.ud_odp_caps;
3488         resp.odp_caps.reserved = 0;
3489 #else
3490         memset(&resp.odp_caps, 0, sizeof(resp.odp_caps));
3491 #endif
3492         resp.response_length += sizeof(resp.odp_caps);
3493
3494         if (ucore->outlen < resp.response_length + sizeof(resp.timestamp_mask))
3495                 goto end;
3496
3497         resp.timestamp_mask = attr.timestamp_mask;
3498         resp.response_length += sizeof(resp.timestamp_mask);
3499
3500         if (ucore->outlen < resp.response_length + sizeof(resp.hca_core_clock))
3501                 goto end;
3502
3503         resp.hca_core_clock = attr.hca_core_clock;
3504         resp.response_length += sizeof(resp.hca_core_clock);
3505
3506 end:
3507         err = ib_copy_to_udata(ucore, &resp, resp.response_length);
3508         if (err)
3509                 return err;
3510
3511         return 0;
3512 }