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 <linux/uaccess.h>
  42
  43 #include <rdma/uverbs_types.h>
  44 #include <rdma/uverbs_std_types.h>
  45 #include "rdma_core.h"
  46
  47 #include "uverbs.h"
  48 #include "core_priv.h"
  49
  50 static struct ib_uverbs_completion_event_file *
  51 ib_uverbs_lookup_comp_file(int fd, struct ib_ucontext *context)
  52 {
  53         struct ib_uobject *uobj = uobj_get_read(uobj_get_type(comp_channel),
  54                                                 fd, context);
  55         struct ib_uobject_file *uobj_file;
  56
  57         if (IS_ERR(uobj))
  58                 return (void *)uobj;
  59
  60         uverbs_uobject_get(uobj);
  61         uobj_put_read(uobj);
  62
  63         uobj_file = container_of(uobj, struct ib_uobject_file, uobj);
  64         return container_of(uobj_file, struct ib_uverbs_completion_event_file,
  65                             uobj_file);
  66 }
  67
  68 ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
  69                               struct ib_device *ib_dev,
  70                               const char __user *buf,
  71                               int in_len, int out_len)
  72 {
  73         struct ib_uverbs_get_context      cmd;
  74         struct ib_uverbs_get_context_resp resp;
  75         struct ib_udata                   udata;
  76         struct ib_ucontext               *ucontext;
  77         struct file                      *filp;
  78         struct ib_rdmacg_object          cg_obj;
  79         int ret;
  80
  81         if (out_len < sizeof resp)
  82                 return -ENOSPC;
  83
  84         if (copy_from_user(&cmd, buf, sizeof cmd))
  85                 return -EFAULT;
  86
  87         mutex_lock(&file->mutex);
  88
  89         if (file->ucontext) {
  90                 ret = -EINVAL;
  91                 goto err;
  92         }
  93
  94         INIT_UDATA(&udata, buf + sizeof cmd,
  95                    (unsigned long) cmd.response + sizeof resp,
  96                    in_len - sizeof cmd, out_len - sizeof resp);
  97
  98         ret = ib_rdmacg_try_charge(&cg_obj, ib_dev, RDMACG_RESOURCE_HCA_HANDLE);
  99         if (ret)
 100                 goto err;
 101
 102         ucontext = ib_dev->alloc_ucontext(ib_dev, &udata);
 103         if (IS_ERR(ucontext)) {
 104                 ret = PTR_ERR(ucontext);
 105                 goto err_alloc;
 106         }
 107
 108         ucontext->device = ib_dev;
 109         ucontext->cg_obj = cg_obj;
 110         /* ufile is required when some objects are released */
 111         ucontext->ufile = file;
 112         uverbs_initialize_ucontext(ucontext);
 113
 114         rcu_read_lock();
 115         ucontext->tgid = get_task_pid(current->group_leader, PIDTYPE_PID);
 116         rcu_read_unlock();
 117         ucontext->closing = 0;
 118
 119 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
 120         ucontext->umem_tree = RB_ROOT;
 121         init_rwsem(&ucontext->umem_rwsem);
 122         ucontext->odp_mrs_count = 0;
 123         INIT_LIST_HEAD(&ucontext->no_private_counters);
 124
 125         if (!(ib_dev->attrs.device_cap_flags & IB_DEVICE_ON_DEMAND_PAGING))
 126                 ucontext->invalidate_range = NULL;
 127
 128 #endif
 129
 130         resp.num_comp_vectors = file->device->num_comp_vectors;
 131
 132         ret = get_unused_fd_flags(O_CLOEXEC);
 133         if (ret < 0)
 134                 goto err_free;
 135         resp.async_fd = ret;
 136
 137         filp = ib_uverbs_alloc_async_event_file(file, ib_dev);
 138         if (IS_ERR(filp)) {
 139                 ret = PTR_ERR(filp);
 140                 goto err_fd;
 141         }
 142
 143         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 144                          &resp, sizeof resp)) {
 145                 ret = -EFAULT;
 146                 goto err_file;
 147         }
 148
 149         file->ucontext = ucontext;
 150
 151         fd_install(resp.async_fd, filp);
 152
 153         mutex_unlock(&file->mutex);
 154
 155         return in_len;
 156
 157 err_file:
 158         ib_uverbs_free_async_event_file(file);
 159         fput(filp);
 160
 161 err_fd:
 162         put_unused_fd(resp.async_fd);
 163
 164 err_free:
 165         put_pid(ucontext->tgid);
 166         ib_dev->dealloc_ucontext(ucontext);
 167
 168 err_alloc:
 169         ib_rdmacg_uncharge(&cg_obj, ib_dev, RDMACG_RESOURCE_HCA_HANDLE);
 170
 171 err:
 172         mutex_unlock(&file->mutex);
 173         return ret;
 174 }
 175
 176 static void copy_query_dev_fields(struct ib_uverbs_file *file,
 177                                   struct ib_device *ib_dev,
 178                                   struct ib_uverbs_query_device_resp *resp,
 179                                   struct ib_device_attr *attr)
 180 {
 181         resp->fw_ver            = attr->fw_ver;
 182         resp->node_guid         = ib_dev->node_guid;
 183         resp->sys_image_guid    = attr->sys_image_guid;
 184         resp->max_mr_size       = attr->max_mr_size;
 185         resp->page_size_cap     = attr->page_size_cap;
 186         resp->vendor_id         = attr->vendor_id;
 187         resp->vendor_part_id    = attr->vendor_part_id;
 188         resp->hw_ver            = attr->hw_ver;
 189         resp->max_qp            = attr->max_qp;
 190         resp->max_qp_wr         = attr->max_qp_wr;
 191         resp->device_cap_flags  = lower_32_bits(attr->device_cap_flags);
 192         resp->max_sge           = attr->max_sge;
 193         resp->max_sge_rd        = attr->max_sge_rd;
 194         resp->max_cq            = attr->max_cq;
 195         resp->max_cqe           = attr->max_cqe;
 196         resp->max_mr            = attr->max_mr;
 197         resp->max_pd            = attr->max_pd;
 198         resp->max_qp_rd_atom    = attr->max_qp_rd_atom;
 199         resp->max_ee_rd_atom    = attr->max_ee_rd_atom;
 200         resp->max_res_rd_atom   = attr->max_res_rd_atom;
 201         resp->max_qp_init_rd_atom       = attr->max_qp_init_rd_atom;
 202         resp->max_ee_init_rd_atom       = attr->max_ee_init_rd_atom;
 203         resp->atomic_cap                = attr->atomic_cap;
 204         resp->max_ee                    = attr->max_ee;
 205         resp->max_rdd                   = attr->max_rdd;
 206         resp->max_mw                    = attr->max_mw;
 207         resp->max_raw_ipv6_qp           = attr->max_raw_ipv6_qp;
 208         resp->max_raw_ethy_qp           = attr->max_raw_ethy_qp;
 209         resp->max_mcast_grp             = attr->max_mcast_grp;
 210         resp->max_mcast_qp_attach       = attr->max_mcast_qp_attach;
 211         resp->max_total_mcast_qp_attach = attr->max_total_mcast_qp_attach;
 212         resp->max_ah                    = attr->max_ah;
 213         resp->max_fmr                   = attr->max_fmr;
 214         resp->max_map_per_fmr           = attr->max_map_per_fmr;
 215         resp->max_srq                   = attr->max_srq;
 216         resp->max_srq_wr                = attr->max_srq_wr;
 217         resp->max_srq_sge               = attr->max_srq_sge;
 218         resp->max_pkeys                 = attr->max_pkeys;
 219         resp->local_ca_ack_delay        = attr->local_ca_ack_delay;
 220         resp->phys_port_cnt             = ib_dev->phys_port_cnt;
 221 }
 222
 223 ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
 224                                struct ib_device *ib_dev,
 225                                const char __user *buf,
 226                                int in_len, int out_len)
 227 {
 228         struct ib_uverbs_query_device      cmd;
 229         struct ib_uverbs_query_device_resp resp;
 230
 231         if (out_len < sizeof resp)
 232                 return -ENOSPC;
 233
 234         if (copy_from_user(&cmd, buf, sizeof cmd))
 235                 return -EFAULT;
 236
 237         memset(&resp, 0, sizeof resp);
 238         copy_query_dev_fields(file, ib_dev, &resp, &ib_dev->attrs);
 239
 240         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 241                          &resp, sizeof resp))
 242                 return -EFAULT;
 243
 244         return in_len;
 245 }
 246
 247 ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
 248                              struct ib_device *ib_dev,
 249                              const char __user *buf,
 250                              int in_len, int out_len)
 251 {
 252         struct ib_uverbs_query_port      cmd;
 253         struct ib_uverbs_query_port_resp resp;
 254         struct ib_port_attr              attr;
 255         int                              ret;
 256
 257         if (out_len < sizeof resp)
 258                 return -ENOSPC;
 259
 260         if (copy_from_user(&cmd, buf, sizeof cmd))
 261                 return -EFAULT;
 262
 263         ret = ib_query_port(ib_dev, cmd.port_num, &attr);
 264         if (ret)
 265                 return ret;
 266
 267         memset(&resp, 0, sizeof resp);
 268
 269         resp.state           = attr.state;
 270         resp.max_mtu         = attr.max_mtu;
 271         resp.active_mtu      = attr.active_mtu;
 272         resp.gid_tbl_len     = attr.gid_tbl_len;
 273         resp.port_cap_flags  = attr.port_cap_flags;
 274         resp.max_msg_sz      = attr.max_msg_sz;
 275         resp.bad_pkey_cntr   = attr.bad_pkey_cntr;
 276         resp.qkey_viol_cntr  = attr.qkey_viol_cntr;
 277         resp.pkey_tbl_len    = attr.pkey_tbl_len;
 278         resp.lid             = attr.lid;
 279         resp.sm_lid          = attr.sm_lid;
 280         resp.lmc             = attr.lmc;
 281         resp.max_vl_num      = attr.max_vl_num;
 282         resp.sm_sl           = attr.sm_sl;
 283         resp.subnet_timeout  = attr.subnet_timeout;
 284         resp.init_type_reply = attr.init_type_reply;
 285         resp.active_width    = attr.active_width;
 286         resp.active_speed    = attr.active_speed;
 287         resp.phys_state      = attr.phys_state;
 288         resp.link_layer      = rdma_port_get_link_layer(ib_dev,
 289                                                         cmd.port_num);
 290
 291         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 292                          &resp, sizeof resp))
 293                 return -EFAULT;
 294
 295         return in_len;
 296 }
 297
 298 ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
 299                            struct ib_device *ib_dev,
 300                            const char __user *buf,
 301                            int in_len, int out_len)
 302 {
 303         struct ib_uverbs_alloc_pd      cmd;
 304         struct ib_uverbs_alloc_pd_resp resp;
 305         struct ib_udata                udata;
 306         struct ib_uobject             *uobj;
 307         struct ib_pd                  *pd;
 308         int                            ret;
 309
 310         if (out_len < sizeof resp)
 311                 return -ENOSPC;
 312
 313         if (copy_from_user(&cmd, buf, sizeof cmd))
 314                 return -EFAULT;
 315
 316         INIT_UDATA(&udata, buf + sizeof cmd,
 317                    (unsigned long) cmd.response + sizeof resp,
 318                    in_len - sizeof cmd, out_len - sizeof resp);
 319
 320         uobj  = uobj_alloc(uobj_get_type(pd), file->ucontext);
 321         if (IS_ERR(uobj))
 322                 return PTR_ERR(uobj);
 323
 324         pd = ib_dev->alloc_pd(ib_dev, file->ucontext, &udata);
 325         if (IS_ERR(pd)) {
 326                 ret = PTR_ERR(pd);
 327                 goto err;
 328         }
 329
 330         pd->device  = ib_dev;
 331         pd->uobject = uobj;
 332         pd->__internal_mr = NULL;
 333         atomic_set(&pd->usecnt, 0);
 334
 335         uobj->object = pd;
 336         memset(&resp, 0, sizeof resp);
 337         resp.pd_handle = uobj->id;
 338
 339         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 340                          &resp, sizeof resp)) {
 341                 ret = -EFAULT;
 342                 goto err_copy;
 343         }
 344
 345         uobj_alloc_commit(uobj);
 346
 347         return in_len;
 348
 349 err_copy:
 350         ib_dealloc_pd(pd);
 351
 352 err:
 353         uobj_alloc_abort(uobj);
 354         return ret;
 355 }
 356
 357 ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
 358                              struct ib_device *ib_dev,
 359                              const char __user *buf,
 360                              int in_len, int out_len)
 361 {
 362         struct ib_uverbs_dealloc_pd cmd;
 363         struct ib_uobject          *uobj;
 364         int                         ret;
 365
 366         if (copy_from_user(&cmd, buf, sizeof cmd))
 367                 return -EFAULT;
 368
 369         uobj  = uobj_get_write(uobj_get_type(pd), cmd.pd_handle,
 370                                file->ucontext);
 371         if (IS_ERR(uobj))
 372                 return PTR_ERR(uobj);
 373
 374         ret = uobj_remove_commit(uobj);
 375
 376         return ret ?: in_len;
 377 }
 378
 379 struct xrcd_table_entry {
 380         struct rb_node  node;
 381         struct ib_xrcd *xrcd;
 382         struct inode   *inode;
 383 };
 384
 385 static int xrcd_table_insert(struct ib_uverbs_device *dev,
 386                             struct inode *inode,
 387                             struct ib_xrcd *xrcd)
 388 {
 389         struct xrcd_table_entry *entry, *scan;
 390         struct rb_node **p = &dev->xrcd_tree.rb_node;
 391         struct rb_node *parent = NULL;
 392
 393         entry = kmalloc(sizeof *entry, GFP_KERNEL);
 394         if (!entry)
 395                 return -ENOMEM;
 396
 397         entry->xrcd  = xrcd;
 398         entry->inode = inode;
 399
 400         while (*p) {
 401                 parent = *p;
 402                 scan = rb_entry(parent, struct xrcd_table_entry, node);
 403
 404                 if (inode < scan->inode) {
 405                         p = &(*p)->rb_left;
 406                 } else if (inode > scan->inode) {
 407                         p = &(*p)->rb_right;
 408                 } else {
 409                         kfree(entry);
 410                         return -EEXIST;
 411                 }
 412         }
 413
 414         rb_link_node(&entry->node, parent, p);
 415         rb_insert_color(&entry->node, &dev->xrcd_tree);
 416         igrab(inode);
 417         return 0;
 418 }
 419
 420 static struct xrcd_table_entry *xrcd_table_search(struct ib_uverbs_device *dev,
 421                                                   struct inode *inode)
 422 {
 423         struct xrcd_table_entry *entry;
 424         struct rb_node *p = dev->xrcd_tree.rb_node;
 425
 426         while (p) {
 427                 entry = rb_entry(p, struct xrcd_table_entry, node);
 428
 429                 if (inode < entry->inode)
 430                         p = p->rb_left;
 431                 else if (inode > entry->inode)
 432                         p = p->rb_right;
 433                 else
 434                         return entry;
 435         }
 436
 437         return NULL;
 438 }
 439
 440 static struct ib_xrcd *find_xrcd(struct ib_uverbs_device *dev, struct inode *inode)
 441 {
 442         struct xrcd_table_entry *entry;
 443
 444         entry = xrcd_table_search(dev, inode);
 445         if (!entry)
 446                 return NULL;
 447
 448         return entry->xrcd;
 449 }
 450
 451 static void xrcd_table_delete(struct ib_uverbs_device *dev,
 452                               struct inode *inode)
 453 {
 454         struct xrcd_table_entry *entry;
 455
 456         entry = xrcd_table_search(dev, inode);
 457         if (entry) {
 458                 iput(inode);
 459                 rb_erase(&entry->node, &dev->xrcd_tree);
 460                 kfree(entry);
 461         }
 462 }
 463
 464 ssize_t ib_uverbs_open_xrcd(struct ib_uverbs_file *file,
 465                             struct ib_device *ib_dev,
 466                             const char __user *buf, int in_len,
 467                             int out_len)
 468 {
 469         struct ib_uverbs_open_xrcd      cmd;
 470         struct ib_uverbs_open_xrcd_resp resp;
 471         struct ib_udata                 udata;
 472         struct ib_uxrcd_object         *obj;
 473         struct ib_xrcd                 *xrcd = NULL;
 474         struct fd                       f = {NULL, 0};
 475         struct inode                   *inode = NULL;
 476         int                             ret = 0;
 477         int                             new_xrcd = 0;
 478
 479         if (out_len < sizeof resp)
 480                 return -ENOSPC;
 481
 482         if (copy_from_user(&cmd, buf, sizeof cmd))
 483                 return -EFAULT;
 484
 485         INIT_UDATA(&udata, buf + sizeof cmd,
 486                    (unsigned long) cmd.response + sizeof resp,
 487                    in_len - sizeof cmd, out_len - sizeof  resp);
 488
 489         mutex_lock(&file->device->xrcd_tree_mutex);
 490
 491         if (cmd.fd != -1) {
 492                 /* search for file descriptor */
 493                 f = fdget(cmd.fd);
 494                 if (!f.file) {
 495                         ret = -EBADF;
 496                         goto err_tree_mutex_unlock;
 497                 }
 498
 499                 inode = file_inode(f.file);
 500                 xrcd = find_xrcd(file->device, inode);
 501                 if (!xrcd && !(cmd.oflags & O_CREAT)) {
 502                         /* no file descriptor. Need CREATE flag */
 503                         ret = -EAGAIN;
 504                         goto err_tree_mutex_unlock;
 505                 }
 506
 507                 if (xrcd && cmd.oflags & O_EXCL) {
 508                         ret = -EINVAL;
 509                         goto err_tree_mutex_unlock;
 510                 }
 511         }
 512
 513         obj  = (struct ib_uxrcd_object *)uobj_alloc(uobj_get_type(xrcd),
 514                                                     file->ucontext);
 515         if (IS_ERR(obj)) {
 516                 ret = PTR_ERR(obj);
 517                 goto err_tree_mutex_unlock;
 518         }
 519
 520         if (!xrcd) {
 521                 xrcd = ib_dev->alloc_xrcd(ib_dev, file->ucontext, &udata);
 522                 if (IS_ERR(xrcd)) {
 523                         ret = PTR_ERR(xrcd);
 524                         goto err;
 525                 }
 526
 527                 xrcd->inode   = inode;
 528                 xrcd->device  = ib_dev;
 529                 atomic_set(&xrcd->usecnt, 0);
 530                 mutex_init(&xrcd->tgt_qp_mutex);
 531                 INIT_LIST_HEAD(&xrcd->tgt_qp_list);
 532                 new_xrcd = 1;
 533         }
 534
 535         atomic_set(&obj->refcnt, 0);
 536         obj->uobject.object = xrcd;
 537         memset(&resp, 0, sizeof resp);
 538         resp.xrcd_handle = obj->uobject.id;
 539
 540         if (inode) {
 541                 if (new_xrcd) {
 542                         /* create new inode/xrcd table entry */
 543                         ret = xrcd_table_insert(file->device, inode, xrcd);
 544                         if (ret)
 545                                 goto err_dealloc_xrcd;
 546                 }
 547                 atomic_inc(&xrcd->usecnt);
 548         }
 549
 550         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 551                          &resp, sizeof resp)) {
 552                 ret = -EFAULT;
 553                 goto err_copy;
 554         }
 555
 556         if (f.file)
 557                 fdput(f);
 558
 559         uobj_alloc_commit(&obj->uobject);
 560
 561         mutex_unlock(&file->device->xrcd_tree_mutex);
 562         return in_len;
 563
 564 err_copy:
 565         if (inode) {
 566                 if (new_xrcd)
 567                         xrcd_table_delete(file->device, inode);
 568                 atomic_dec(&xrcd->usecnt);
 569         }
 570
 571 err_dealloc_xrcd:
 572         ib_dealloc_xrcd(xrcd);
 573
 574 err:
 575         uobj_alloc_abort(&obj->uobject);
 576
 577 err_tree_mutex_unlock:
 578         if (f.file)
 579                 fdput(f);
 580
 581         mutex_unlock(&file->device->xrcd_tree_mutex);
 582
 583         return ret;
 584 }
 585
 586 ssize_t ib_uverbs_close_xrcd(struct ib_uverbs_file *file,
 587                              struct ib_device *ib_dev,
 588                              const char __user *buf, int in_len,
 589                              int out_len)
 590 {
 591         struct ib_uverbs_close_xrcd cmd;
 592         struct ib_uobject           *uobj;
 593         int                         ret = 0;
 594
 595         if (copy_from_user(&cmd, buf, sizeof cmd))
 596                 return -EFAULT;
 597
 598         uobj  = uobj_get_write(uobj_get_type(xrcd), cmd.xrcd_handle,
 599                                file->ucontext);
 600         if (IS_ERR(uobj)) {
 601                 mutex_unlock(&file->device->xrcd_tree_mutex);
 602                 return PTR_ERR(uobj);
 603         }
 604
 605         ret = uobj_remove_commit(uobj);
 606         return ret ?: in_len;
 607 }
 608
 609 int ib_uverbs_dealloc_xrcd(struct ib_uverbs_device *dev,
 610                            struct ib_xrcd *xrcd,
 611                            enum rdma_remove_reason why)
 612 {
 613         struct inode *inode;
 614         int ret;
 615
 616         inode = xrcd->inode;
 617         if (inode && !atomic_dec_and_test(&xrcd->usecnt))
 618                 return 0;
 619
 620         ret = ib_dealloc_xrcd(xrcd);
 621
 622         if (why == RDMA_REMOVE_DESTROY && ret)
 623                 atomic_inc(&xrcd->usecnt);
 624         else if (inode)
 625                 xrcd_table_delete(dev, inode);
 626
 627         return ret;
 628 }
 629
 630 ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
 631                          struct ib_device *ib_dev,
 632                          const char __user *buf, int in_len,
 633                          int out_len)
 634 {
 635         struct ib_uverbs_reg_mr      cmd;
 636         struct ib_uverbs_reg_mr_resp resp;
 637         struct ib_udata              udata;
 638         struct ib_uobject           *uobj;
 639         struct ib_pd                *pd;
 640         struct ib_mr                *mr;
 641         int                          ret;
 642
 643         if (out_len < sizeof resp)
 644                 return -ENOSPC;
 645
 646         if (copy_from_user(&cmd, buf, sizeof cmd))
 647                 return -EFAULT;
 648
 649         INIT_UDATA(&udata, buf + sizeof cmd,
 650                    (unsigned long) cmd.response + sizeof resp,
 651                    in_len - sizeof cmd, out_len - sizeof resp);
 652
 653         if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
 654                 return -EINVAL;
 655
 656         ret = ib_check_mr_access(cmd.access_flags);
 657         if (ret)
 658                 return ret;
 659
 660         uobj  = uobj_alloc(uobj_get_type(mr), file->ucontext);
 661         if (IS_ERR(uobj))
 662                 return PTR_ERR(uobj);
 663
 664         pd = uobj_get_obj_read(pd, cmd.pd_handle, file->ucontext);
 665         if (!pd) {
 666                 ret = -EINVAL;
 667                 goto err_free;
 668         }
 669
 670         if (cmd.access_flags & IB_ACCESS_ON_DEMAND) {
 671                 if (!(pd->device->attrs.device_cap_flags &
 672                       IB_DEVICE_ON_DEMAND_PAGING)) {
 673                         pr_debug("ODP support not available\n");
 674                         ret = -EINVAL;
 675                         goto err_put;
 676                 }
 677         }
 678
 679         mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
 680                                      cmd.access_flags, &udata);
 681         if (IS_ERR(mr)) {
 682                 ret = PTR_ERR(mr);
 683                 goto err_put;
 684         }
 685
 686         mr->device  = pd->device;
 687         mr->pd      = pd;
 688         mr->uobject = uobj;
 689         atomic_inc(&pd->usecnt);
 690
 691         uobj->object = mr;
 692
 693         memset(&resp, 0, sizeof resp);
 694         resp.lkey      = mr->lkey;
 695         resp.rkey      = mr->rkey;
 696         resp.mr_handle = uobj->id;
 697
 698         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 699                          &resp, sizeof resp)) {
 700                 ret = -EFAULT;
 701                 goto err_copy;
 702         }
 703
 704         uobj_put_obj_read(pd);
 705
 706         uobj_alloc_commit(uobj);
 707
 708         return in_len;
 709
 710 err_copy:
 711         ib_dereg_mr(mr);
 712
 713 err_put:
 714         uobj_put_obj_read(pd);
 715
 716 err_free:
 717         uobj_alloc_abort(uobj);
 718         return ret;
 719 }
 720
 721 ssize_t ib_uverbs_rereg_mr(struct ib_uverbs_file *file,
 722                            struct ib_device *ib_dev,
 723                            const char __user *buf, int in_len,
 724                            int out_len)
 725 {
 726         struct ib_uverbs_rereg_mr      cmd;
 727         struct ib_uverbs_rereg_mr_resp resp;
 728         struct ib_udata              udata;
 729         struct ib_pd                *pd = NULL;
 730         struct ib_mr                *mr;
 731         struct ib_pd                *old_pd;
 732         int                          ret;
 733         struct ib_uobject           *uobj;
 734
 735         if (out_len < sizeof(resp))
 736                 return -ENOSPC;
 737
 738         if (copy_from_user(&cmd, buf, sizeof(cmd)))
 739                 return -EFAULT;
 740
 741         INIT_UDATA(&udata, buf + sizeof(cmd),
 742                    (unsigned long) cmd.response + sizeof(resp),
 743                    in_len - sizeof(cmd), out_len - sizeof(resp));
 744
 745         if (cmd.flags & ~IB_MR_REREG_SUPPORTED || !cmd.flags)
 746                 return -EINVAL;
 747
 748         if ((cmd.flags & IB_MR_REREG_TRANS) &&
 749             (!cmd.start || !cmd.hca_va || 0 >= cmd.length ||
 750              (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)))
 751                         return -EINVAL;
 752
 753         uobj  = uobj_get_write(uobj_get_type(mr), cmd.mr_handle,
 754                                file->ucontext);
 755         if (IS_ERR(uobj))
 756                 return PTR_ERR(uobj);
 757
 758         mr = uobj->object;
 759
 760         if (cmd.flags & IB_MR_REREG_ACCESS) {
 761                 ret = ib_check_mr_access(cmd.access_flags);
 762                 if (ret)
 763                         goto put_uobjs;
 764         }
 765
 766         if (cmd.flags & IB_MR_REREG_PD) {
 767                 pd = uobj_get_obj_read(pd, cmd.pd_handle, file->ucontext);
 768                 if (!pd) {
 769                         ret = -EINVAL;
 770                         goto put_uobjs;
 771                 }
 772         }
 773
 774         old_pd = mr->pd;
 775         ret = mr->device->rereg_user_mr(mr, cmd.flags, cmd.start,
 776                                         cmd.length, cmd.hca_va,
 777                                         cmd.access_flags, pd, &udata);
 778         if (!ret) {
 779                 if (cmd.flags & IB_MR_REREG_PD) {
 780                         atomic_inc(&pd->usecnt);
 781                         mr->pd = pd;
 782                         atomic_dec(&old_pd->usecnt);
 783                 }
 784         } else {
 785                 goto put_uobj_pd;
 786         }
 787
 788         memset(&resp, 0, sizeof(resp));
 789         resp.lkey      = mr->lkey;
 790         resp.rkey      = mr->rkey;
 791
 792         if (copy_to_user((void __user *)(unsigned long)cmd.response,
 793                          &resp, sizeof(resp)))
 794                 ret = -EFAULT;
 795         else
 796                 ret = in_len;
 797
 798 put_uobj_pd:
 799         if (cmd.flags & IB_MR_REREG_PD)
 800                 uobj_put_obj_read(pd);
 801
 802 put_uobjs:
 803         uobj_put_write(uobj);
 804
 805         return ret;
 806 }
 807
 808 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
 809                            struct ib_device *ib_dev,
 810                            const char __user *buf, int in_len,
 811                            int out_len)
 812 {
 813         struct ib_uverbs_dereg_mr cmd;
 814         struct ib_uobject        *uobj;
 815         int                       ret = -EINVAL;
 816
 817         if (copy_from_user(&cmd, buf, sizeof cmd))
 818                 return -EFAULT;
 819
 820         uobj  = uobj_get_write(uobj_get_type(mr), cmd.mr_handle,
 821                                file->ucontext);
 822         if (IS_ERR(uobj))
 823                 return PTR_ERR(uobj);
 824
 825         ret = uobj_remove_commit(uobj);
 826
 827         return ret ?: in_len;
 828 }
 829
 830 ssize_t ib_uverbs_alloc_mw(struct ib_uverbs_file *file,
 831                            struct ib_device *ib_dev,
 832                            const char __user *buf, int in_len,
 833                            int out_len)
 834 {
 835         struct ib_uverbs_alloc_mw      cmd;
 836         struct ib_uverbs_alloc_mw_resp resp;
 837         struct ib_uobject             *uobj;
 838         struct ib_pd                  *pd;
 839         struct ib_mw                  *mw;
 840         struct ib_udata                udata;
 841         int                            ret;
 842
 843         if (out_len < sizeof(resp))
 844                 return -ENOSPC;
 845
 846         if (copy_from_user(&cmd, buf, sizeof(cmd)))
 847                 return -EFAULT;
 848
 849         uobj  = uobj_alloc(uobj_get_type(mw), file->ucontext);
 850         if (IS_ERR(uobj))
 851                 return PTR_ERR(uobj);
 852
 853         pd = uobj_get_obj_read(pd, cmd.pd_handle, file->ucontext);
 854         if (!pd) {
 855                 ret = -EINVAL;
 856                 goto err_free;
 857         }
 858
 859         INIT_UDATA(&udata, buf + sizeof(cmd),
 860                    (unsigned long)cmd.response + sizeof(resp),
 861                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
 862                    out_len - sizeof(resp));
 863
 864         mw = pd->device->alloc_mw(pd, cmd.mw_type, &udata);
 865         if (IS_ERR(mw)) {
 866                 ret = PTR_ERR(mw);
 867                 goto err_put;
 868         }
 869
 870         mw->device  = pd->device;
 871         mw->pd      = pd;
 872         mw->uobject = uobj;
 873         atomic_inc(&pd->usecnt);
 874
 875         uobj->object = mw;
 876
 877         memset(&resp, 0, sizeof(resp));
 878         resp.rkey      = mw->rkey;
 879         resp.mw_handle = uobj->id;
 880
 881         if (copy_to_user((void __user *)(unsigned long)cmd.response,
 882                          &resp, sizeof(resp))) {
 883                 ret = -EFAULT;
 884                 goto err_copy;
 885         }
 886
 887         uobj_put_obj_read(pd);
 888         uobj_alloc_commit(uobj);
 889
 890         return in_len;
 891
 892 err_copy:
 893         uverbs_dealloc_mw(mw);
 894 err_put:
 895         uobj_put_obj_read(pd);
 896 err_free:
 897         uobj_alloc_abort(uobj);
 898         return ret;
 899 }
 900
 901 ssize_t ib_uverbs_dealloc_mw(struct ib_uverbs_file *file,
 902                              struct ib_device *ib_dev,
 903                              const char __user *buf, int in_len,
 904                              int out_len)
 905 {
 906         struct ib_uverbs_dealloc_mw cmd;
 907         struct ib_uobject          *uobj;
 908         int                         ret = -EINVAL;
 909
 910         if (copy_from_user(&cmd, buf, sizeof(cmd)))
 911                 return -EFAULT;
 912
 913         uobj  = uobj_get_write(uobj_get_type(mw), cmd.mw_handle,
 914                                file->ucontext);
 915         if (IS_ERR(uobj))
 916                 return PTR_ERR(uobj);
 917
 918         ret = uobj_remove_commit(uobj);
 919         return ret ?: in_len;
 920 }
 921
 922 ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
 923                                       struct ib_device *ib_dev,
 924                                       const char __user *buf, int in_len,
 925                                       int out_len)
 926 {
 927         struct ib_uverbs_create_comp_channel       cmd;
 928         struct ib_uverbs_create_comp_channel_resp  resp;
 929         struct ib_uobject                         *uobj;
 930         struct ib_uverbs_completion_event_file    *ev_file;
 931
 932         if (out_len < sizeof resp)
 933                 return -ENOSPC;
 934
 935         if (copy_from_user(&cmd, buf, sizeof cmd))
 936                 return -EFAULT;
 937
 938         uobj = uobj_alloc(uobj_get_type(comp_channel), file->ucontext);
 939         if (IS_ERR(uobj))
 940                 return PTR_ERR(uobj);
 941
 942         resp.fd = uobj->id;
 943
 944         ev_file = container_of(uobj, struct ib_uverbs_completion_event_file,
 945                                uobj_file.uobj);
 946         ib_uverbs_init_event_queue(&ev_file->ev_queue);
 947
 948         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 949                          &resp, sizeof resp)) {
 950                 uobj_alloc_abort(uobj);
 951                 return -EFAULT;
 952         }
 953
 954         uobj_alloc_commit(uobj);
 955         return in_len;
 956 }
 957
 958 static struct ib_ucq_object *create_cq(struct ib_uverbs_file *file,
 959                                         struct ib_device *ib_dev,
 960                                        struct ib_udata *ucore,
 961                                        struct ib_udata *uhw,
 962                                        struct ib_uverbs_ex_create_cq *cmd,
 963                                        size_t cmd_sz,
 964                                        int (*cb)(struct ib_uverbs_file *file,
 965                                                  struct ib_ucq_object *obj,
 966                                                  struct ib_uverbs_ex_create_cq_resp *resp,
 967                                                  struct ib_udata *udata,
 968                                                  void *context),
 969                                        void *context)
 970 {
 971         struct ib_ucq_object           *obj;
 972         struct ib_uverbs_completion_event_file    *ev_file = NULL;
 973         struct ib_cq                   *cq;
 974         int                             ret;
 975         struct ib_uverbs_ex_create_cq_resp resp;
 976         struct ib_cq_init_attr attr = {};
 977
 978         if (cmd->comp_vector >= file->device->num_comp_vectors)
 979                 return ERR_PTR(-EINVAL);
 980
 981         obj  = (struct ib_ucq_object *)uobj_alloc(uobj_get_type(cq),
 982                                                   file->ucontext);
 983         if (IS_ERR(obj))
 984                 return obj;
 985
 986         if (cmd->comp_channel >= 0) {
 987                 ev_file = ib_uverbs_lookup_comp_file(cmd->comp_channel,
 988                                                      file->ucontext);
 989                 if (IS_ERR(ev_file)) {
 990                         ret = PTR_ERR(ev_file);
 991                         goto err;
 992                 }
 993         }
 994
 995         obj->uobject.user_handle = cmd->user_handle;
 996         obj->uverbs_file           = file;
 997         obj->comp_events_reported  = 0;
 998         obj->async_events_reported = 0;
 999         INIT_LIST_HEAD(&obj->comp_list);
1000         INIT_LIST_HEAD(&obj->async_list);
1001
1002         attr.cqe = cmd->cqe;
1003         attr.comp_vector = cmd->comp_vector;
1004
1005         if (cmd_sz > offsetof(typeof(*cmd), flags) + sizeof(cmd->flags))
1006                 attr.flags = cmd->flags;
1007
1008         cq = ib_dev->create_cq(ib_dev, &attr, file->ucontext, uhw);
1009         if (IS_ERR(cq)) {
1010                 ret = PTR_ERR(cq);
1011                 goto err_file;
1012         }
1013
1014         cq->device        = ib_dev;
1015         cq->uobject       = &obj->uobject;
1016         cq->comp_handler  = ib_uverbs_comp_handler;
1017         cq->event_handler = ib_uverbs_cq_event_handler;
1018         cq->cq_context    = &ev_file->ev_queue;
1019         atomic_set(&cq->usecnt, 0);
1020
1021         obj->uobject.object = cq;
1022         memset(&resp, 0, sizeof resp);
1023         resp.base.cq_handle = obj->uobject.id;
1024         resp.base.cqe       = cq->cqe;
1025
1026         resp.response_length = offsetof(typeof(resp), response_length) +
1027                 sizeof(resp.response_length);
1028
1029         ret = cb(file, obj, &resp, ucore, context);
1030         if (ret)
1031                 goto err_cb;
1032
1033         uobj_alloc_commit(&obj->uobject);
1034
1035         return obj;
1036
1037 err_cb:
1038         ib_destroy_cq(cq);
1039
1040 err_file:
1041         if (ev_file)
1042                 ib_uverbs_release_ucq(file, ev_file, obj);
1043
1044 err:
1045         uobj_alloc_abort(&obj->uobject);
1046
1047         return ERR_PTR(ret);
1048 }
1049
1050 static int ib_uverbs_create_cq_cb(struct ib_uverbs_file *file,
1051                                   struct ib_ucq_object *obj,
1052                                   struct ib_uverbs_ex_create_cq_resp *resp,
1053                                   struct ib_udata *ucore, void *context)
1054 {
1055         if (ib_copy_to_udata(ucore, &resp->base, sizeof(resp->base)))
1056                 return -EFAULT;
1057
1058         return 0;
1059 }
1060
1061 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
1062                             struct ib_device *ib_dev,
1063                             const char __user *buf, int in_len,
1064                             int out_len)
1065 {
1066         struct ib_uverbs_create_cq      cmd;
1067         struct ib_uverbs_ex_create_cq   cmd_ex;
1068         struct ib_uverbs_create_cq_resp resp;
1069         struct ib_udata                 ucore;
1070         struct ib_udata                 uhw;
1071         struct ib_ucq_object           *obj;
1072
1073         if (out_len < sizeof(resp))
1074                 return -ENOSPC;
1075
1076         if (copy_from_user(&cmd, buf, sizeof(cmd)))
1077                 return -EFAULT;
1078
1079         INIT_UDATA(&ucore, buf, (unsigned long)cmd.response, sizeof(cmd), sizeof(resp));
1080
1081         INIT_UDATA(&uhw, buf + sizeof(cmd),
1082                    (unsigned long)cmd.response + sizeof(resp),
1083                    in_len - sizeof(cmd), out_len - sizeof(resp));
1084
1085         memset(&cmd_ex, 0, sizeof(cmd_ex));
1086         cmd_ex.user_handle = cmd.user_handle;
1087         cmd_ex.cqe = cmd.cqe;
1088         cmd_ex.comp_vector = cmd.comp_vector;
1089         cmd_ex.comp_channel = cmd.comp_channel;
1090
1091         obj = create_cq(file, ib_dev, &ucore, &uhw, &cmd_ex,
1092                         offsetof(typeof(cmd_ex), comp_channel) +
1093                         sizeof(cmd.comp_channel), ib_uverbs_create_cq_cb,
1094                         NULL);
1095
1096         if (IS_ERR(obj))
1097                 return PTR_ERR(obj);
1098
1099         return in_len;
1100 }
1101
1102 static int ib_uverbs_ex_create_cq_cb(struct ib_uverbs_file *file,
1103                                      struct ib_ucq_object *obj,
1104                                      struct ib_uverbs_ex_create_cq_resp *resp,
1105                                      struct ib_udata *ucore, void *context)
1106 {
1107         if (ib_copy_to_udata(ucore, resp, resp->response_length))
1108                 return -EFAULT;
1109
1110         return 0;
1111 }
1112
1113 int ib_uverbs_ex_create_cq(struct ib_uverbs_file *file,
1114                          struct ib_device *ib_dev,
1115                            struct ib_udata *ucore,
1116                            struct ib_udata *uhw)
1117 {
1118         struct ib_uverbs_ex_create_cq_resp resp;
1119         struct ib_uverbs_ex_create_cq  cmd;
1120         struct ib_ucq_object           *obj;
1121         int err;
1122
1123         if (ucore->inlen < sizeof(cmd))
1124                 return -EINVAL;
1125
1126         err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
1127         if (err)
1128                 return err;
1129
1130         if (cmd.comp_mask)
1131                 return -EINVAL;
1132
1133         if (cmd.reserved)
1134                 return -EINVAL;
1135
1136         if (ucore->outlen < (offsetof(typeof(resp), response_length) +
1137                              sizeof(resp.response_length)))
1138                 return -ENOSPC;
1139
1140         obj = create_cq(file, ib_dev, ucore, uhw, &cmd,
1141                         min(ucore->inlen, sizeof(cmd)),
1142                         ib_uverbs_ex_create_cq_cb, NULL);
1143
1144         if (IS_ERR(obj))
1145                 return PTR_ERR(obj);
1146
1147         return 0;
1148 }
1149
1150 ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
1151                             struct ib_device *ib_dev,
1152                             const char __user *buf, int in_len,
1153                             int out_len)
1154 {
1155         struct ib_uverbs_resize_cq      cmd;
1156         struct ib_uverbs_resize_cq_resp resp;
1157         struct ib_udata                 udata;
1158         struct ib_cq                    *cq;
1159         int                             ret = -EINVAL;
1160
1161         if (copy_from_user(&cmd, buf, sizeof cmd))
1162                 return -EFAULT;
1163
1164         INIT_UDATA(&udata, buf + sizeof cmd,
1165                    (unsigned long) cmd.response + sizeof resp,
1166                    in_len - sizeof cmd, out_len - sizeof resp);
1167
1168         cq = uobj_get_obj_read(cq, cmd.cq_handle, file->ucontext);
1169         if (!cq)
1170                 return -EINVAL;
1171
1172         ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
1173         if (ret)
1174                 goto out;
1175
1176         resp.cqe = cq->cqe;
1177
1178         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1179                          &resp, sizeof resp.cqe))
1180                 ret = -EFAULT;
1181
1182 out:
1183         uobj_put_obj_read(cq);
1184
1185         return ret ? ret : in_len;
1186 }
1187
1188 static int copy_wc_to_user(void __user *dest, struct ib_wc *wc)
1189 {
1190         struct ib_uverbs_wc tmp;
1191
1192         tmp.wr_id               = wc->wr_id;
1193         tmp.status              = wc->status;
1194         tmp.opcode              = wc->opcode;
1195         tmp.vendor_err          = wc->vendor_err;
1196         tmp.byte_len            = wc->byte_len;
1197         tmp.ex.imm_data         = (__u32 __force) wc->ex.imm_data;
1198         tmp.qp_num              = wc->qp->qp_num;
1199         tmp.src_qp              = wc->src_qp;
1200         tmp.wc_flags            = wc->wc_flags;
1201         tmp.pkey_index          = wc->pkey_index;
1202         tmp.slid                = wc->slid;
1203         tmp.sl                  = wc->sl;
1204         tmp.dlid_path_bits      = wc->dlid_path_bits;
1205         tmp.port_num            = wc->port_num;
1206         tmp.reserved            = 0;
1207
1208         if (copy_to_user(dest, &tmp, sizeof tmp))
1209                 return -EFAULT;
1210
1211         return 0;
1212 }
1213
1214 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
1215                           struct ib_device *ib_dev,
1216                           const char __user *buf, int in_len,
1217                           int out_len)
1218 {
1219         struct ib_uverbs_poll_cq       cmd;
1220         struct ib_uverbs_poll_cq_resp  resp;
1221         u8 __user                     *header_ptr;
1222         u8 __user                     *data_ptr;
1223         struct ib_cq                  *cq;
1224         struct ib_wc                   wc;
1225         int                            ret;
1226
1227         if (copy_from_user(&cmd, buf, sizeof cmd))
1228                 return -EFAULT;
1229
1230         cq = uobj_get_obj_read(cq, cmd.cq_handle, file->ucontext);
1231         if (!cq)
1232                 return -EINVAL;
1233
1234         /* we copy a struct ib_uverbs_poll_cq_resp to user space */
1235         header_ptr = (void __user *)(unsigned long) cmd.response;
1236         data_ptr = header_ptr + sizeof resp;
1237
1238         memset(&resp, 0, sizeof resp);
1239         while (resp.count < cmd.ne) {
1240                 ret = ib_poll_cq(cq, 1, &wc);
1241                 if (ret < 0)
1242                         goto out_put;
1243                 if (!ret)
1244                         break;
1245
1246                 ret = copy_wc_to_user(data_ptr, &wc);
1247                 if (ret)
1248                         goto out_put;
1249
1250                 data_ptr += sizeof(struct ib_uverbs_wc);
1251                 ++resp.count;
1252         }
1253
1254         if (copy_to_user(header_ptr, &resp, sizeof resp)) {
1255                 ret = -EFAULT;
1256                 goto out_put;
1257         }
1258
1259         ret = in_len;
1260
1261 out_put:
1262         uobj_put_obj_read(cq);
1263         return ret;
1264 }
1265
1266 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
1267                                 struct ib_device *ib_dev,
1268                                 const char __user *buf, int in_len,
1269                                 int out_len)
1270 {
1271         struct ib_uverbs_req_notify_cq cmd;
1272         struct ib_cq                  *cq;
1273
1274         if (copy_from_user(&cmd, buf, sizeof cmd))
1275                 return -EFAULT;
1276
1277         cq = uobj_get_obj_read(cq, cmd.cq_handle, file->ucontext);
1278         if (!cq)
1279                 return -EINVAL;
1280
1281         ib_req_notify_cq(cq, cmd.solicited_only ?
1282                          IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
1283
1284         uobj_put_obj_read(cq);
1285
1286         return in_len;
1287 }
1288
1289 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
1290                              struct ib_device *ib_dev,
1291                              const char __user *buf, int in_len,
1292                              int out_len)
1293 {
1294         struct ib_uverbs_destroy_cq      cmd;
1295         struct ib_uverbs_destroy_cq_resp resp;
1296         struct ib_uobject               *uobj;
1297         struct ib_cq                    *cq;
1298         struct ib_ucq_object            *obj;
1299         struct ib_uverbs_event_queue    *ev_queue;
1300         int                              ret = -EINVAL;
1301
1302         if (copy_from_user(&cmd, buf, sizeof cmd))
1303                 return -EFAULT;
1304
1305         uobj  = uobj_get_write(uobj_get_type(cq), cmd.cq_handle,
1306                                file->ucontext);
1307         if (IS_ERR(uobj))
1308                 return PTR_ERR(uobj);
1309
1310         /*
1311          * Make sure we don't free the memory in remove_commit as we still
1312          * needs the uobject memory to create the response.
1313          */
1314         uverbs_uobject_get(uobj);
1315         cq      = uobj->object;
1316         ev_queue = cq->cq_context;
1317         obj     = container_of(cq->uobject, struct ib_ucq_object, uobject);
1318
1319         memset(&resp, 0, sizeof(resp));
1320
1321         ret = uobj_remove_commit(uobj);
1322         if (ret) {
1323                 uverbs_uobject_put(uobj);
1324                 return ret;
1325         }
1326
1327         resp.comp_events_reported  = obj->comp_events_reported;
1328         resp.async_events_reported = obj->async_events_reported;
1329
1330         uverbs_uobject_put(uobj);
1331         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1332                          &resp, sizeof resp))
1333                 return -EFAULT;
1334
1335         return in_len;
1336 }
1337
1338 static int create_qp(struct ib_uverbs_file *file,
1339                      struct ib_udata *ucore,
1340                      struct ib_udata *uhw,
1341                      struct ib_uverbs_ex_create_qp *cmd,
1342                      size_t cmd_sz,
1343                      int (*cb)(struct ib_uverbs_file *file,
1344                                struct ib_uverbs_ex_create_qp_resp *resp,
1345                                struct ib_udata *udata),
1346                      void *context)
1347 {
1348         struct ib_uqp_object            *obj;
1349         struct ib_device                *device;
1350         struct ib_pd                    *pd = NULL;
1351         struct ib_xrcd                  *xrcd = NULL;
1352         struct ib_uobject               *xrcd_uobj = ERR_PTR(-ENOENT);
1353         struct ib_cq                    *scq = NULL, *rcq = NULL;
1354         struct ib_srq                   *srq = NULL;
1355         struct ib_qp                    *qp;
1356         char                            *buf;
1357         struct ib_qp_init_attr          attr = {};
1358         struct ib_uverbs_ex_create_qp_resp resp;
1359         int                             ret;
1360         struct ib_rwq_ind_table *ind_tbl = NULL;
1361         bool has_sq = true;
1362
1363         if (cmd->qp_type == IB_QPT_RAW_PACKET && !capable(CAP_NET_RAW))
1364                 return -EPERM;
1365
1366         obj  = (struct ib_uqp_object *)uobj_alloc(uobj_get_type(qp),
1367                                                   file->ucontext);
1368         if (IS_ERR(obj))
1369                 return PTR_ERR(obj);
1370         obj->uxrcd = NULL;
1371         obj->uevent.uobject.user_handle = cmd->user_handle;
1372         mutex_init(&obj->mcast_lock);
1373
1374         if (cmd_sz >= offsetof(typeof(*cmd), rwq_ind_tbl_handle) +
1375                       sizeof(cmd->rwq_ind_tbl_handle) &&
1376                       (cmd->comp_mask & IB_UVERBS_CREATE_QP_MASK_IND_TABLE)) {
1377                 ind_tbl = uobj_get_obj_read(rwq_ind_table,
1378                                             cmd->rwq_ind_tbl_handle,
1379                                             file->ucontext);
1380                 if (!ind_tbl) {
1381                         ret = -EINVAL;
1382                         goto err_put;
1383                 }
1384
1385                 attr.rwq_ind_tbl = ind_tbl;
1386         }
1387
1388         if ((cmd_sz >= offsetof(typeof(*cmd), reserved1) +
1389                        sizeof(cmd->reserved1)) && cmd->reserved1) {
1390                 ret = -EOPNOTSUPP;
1391                 goto err_put;
1392         }
1393
1394         if (ind_tbl && (cmd->max_recv_wr || cmd->max_recv_sge || cmd->is_srq)) {
1395                 ret = -EINVAL;
1396                 goto err_put;
1397         }
1398
1399         if (ind_tbl && !cmd->max_send_wr)
1400                 has_sq = false;
1401
1402         if (cmd->qp_type == IB_QPT_XRC_TGT) {
1403                 xrcd_uobj = uobj_get_read(uobj_get_type(xrcd), cmd->pd_handle,
1404                                           file->ucontext);
1405
1406                 if (IS_ERR(xrcd_uobj)) {
1407                         ret = -EINVAL;
1408                         goto err_put;
1409                 }
1410
1411                 xrcd = (struct ib_xrcd *)xrcd_uobj->object;
1412                 if (!xrcd) {
1413                         ret = -EINVAL;
1414                         goto err_put;
1415                 }
1416                 device = xrcd->device;
1417         } else {
1418                 if (cmd->qp_type == IB_QPT_XRC_INI) {
1419                         cmd->max_recv_wr = 0;
1420                         cmd->max_recv_sge = 0;
1421                 } else {
1422                         if (cmd->is_srq) {
1423                                 srq = uobj_get_obj_read(srq, cmd->srq_handle,
1424                                                         file->ucontext);
1425                                 if (!srq || srq->srq_type != IB_SRQT_BASIC) {
1426                                         ret = -EINVAL;
1427                                         goto err_put;
1428                                 }
1429                         }
1430
1431                         if (!ind_tbl) {
1432                                 if (cmd->recv_cq_handle != cmd->send_cq_handle) {
1433                                         rcq = uobj_get_obj_read(cq, cmd->recv_cq_handle,
1434                                                                 file->ucontext);
1435                                         if (!rcq) {
1436                                                 ret = -EINVAL;
1437                                                 goto err_put;
1438                                         }
1439                                 }
1440                         }
1441                 }
1442
1443                 if (has_sq)
1444                         scq = uobj_get_obj_read(cq, cmd->send_cq_handle,
1445                                                 file->ucontext);
1446                 if (!ind_tbl)
1447                         rcq = rcq ?: scq;
1448                 pd  = uobj_get_obj_read(pd, cmd->pd_handle, file->ucontext);
1449                 if (!pd || (!scq && has_sq)) {
1450                         ret = -EINVAL;
1451                         goto err_put;
1452                 }
1453
1454                 device = pd->device;
1455         }
1456
1457         attr.event_handler = ib_uverbs_qp_event_handler;
1458         attr.qp_context    = file;
1459         attr.send_cq       = scq;
1460         attr.recv_cq       = rcq;
1461         attr.srq           = srq;
1462         attr.xrcd          = xrcd;
1463         attr.sq_sig_type   = cmd->sq_sig_all ? IB_SIGNAL_ALL_WR :
1464                                               IB_SIGNAL_REQ_WR;
1465         attr.qp_type       = cmd->qp_type;
1466         attr.create_flags  = 0;
1467
1468         attr.cap.max_send_wr     = cmd->max_send_wr;
1469         attr.cap.max_recv_wr     = cmd->max_recv_wr;
1470         attr.cap.max_send_sge    = cmd->max_send_sge;
1471         attr.cap.max_recv_sge    = cmd->max_recv_sge;
1472         attr.cap.max_inline_data = cmd->max_inline_data;
1473
1474         obj->uevent.events_reported     = 0;
1475         INIT_LIST_HEAD(&obj->uevent.event_list);
1476         INIT_LIST_HEAD(&obj->mcast_list);
1477
1478         if (cmd_sz >= offsetof(typeof(*cmd), create_flags) +
1479                       sizeof(cmd->create_flags))
1480                 attr.create_flags = cmd->create_flags;
1481
1482         if (attr.create_flags & ~(IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK |
1483                                 IB_QP_CREATE_CROSS_CHANNEL |
1484                                 IB_QP_CREATE_MANAGED_SEND |
1485                                 IB_QP_CREATE_MANAGED_RECV |
1486                                 IB_QP_CREATE_SCATTER_FCS |
1487                                 IB_QP_CREATE_CVLAN_STRIPPING)) {
1488                 ret = -EINVAL;
1489                 goto err_put;
1490         }
1491
1492         buf = (void *)cmd + sizeof(*cmd);
1493         if (cmd_sz > sizeof(*cmd))
1494                 if (!(buf[0] == 0 && !memcmp(buf, buf + 1,
1495                                              cmd_sz - sizeof(*cmd) - 1))) {
1496                         ret = -EINVAL;
1497                         goto err_put;
1498                 }
1499
1500         if (cmd->qp_type == IB_QPT_XRC_TGT)
1501                 qp = ib_create_qp(pd, &attr);
1502         else
1503                 qp = device->create_qp(pd, &attr, uhw);
1504
1505         if (IS_ERR(qp)) {
1506                 ret = PTR_ERR(qp);
1507                 goto err_put;
1508         }
1509
1510         if (cmd->qp_type != IB_QPT_XRC_TGT) {
1511                 qp->real_qp       = qp;
1512                 qp->device        = device;
1513                 qp->pd            = pd;
1514                 qp->send_cq       = attr.send_cq;
1515                 qp->recv_cq       = attr.recv_cq;
1516                 qp->srq           = attr.srq;
1517                 qp->rwq_ind_tbl   = ind_tbl;
1518                 qp->event_handler = attr.event_handler;
1519                 qp->qp_context    = attr.qp_context;
1520                 qp->qp_type       = attr.qp_type;
1521                 atomic_set(&qp->usecnt, 0);
1522                 atomic_inc(&pd->usecnt);
1523                 if (attr.send_cq)
1524                         atomic_inc(&attr.send_cq->usecnt);
1525                 if (attr.recv_cq)
1526                         atomic_inc(&attr.recv_cq->usecnt);
1527                 if (attr.srq)
1528                         atomic_inc(&attr.srq->usecnt);
1529                 if (ind_tbl)
1530                         atomic_inc(&ind_tbl->usecnt);
1531         }
1532         qp->uobject = &obj->uevent.uobject;
1533
1534         obj->uevent.uobject.object = qp;
1535
1536         memset(&resp, 0, sizeof resp);
1537         resp.base.qpn             = qp->qp_num;
1538         resp.base.qp_handle       = obj->uevent.uobject.id;
1539         resp.base.max_recv_sge    = attr.cap.max_recv_sge;
1540         resp.base.max_send_sge    = attr.cap.max_send_sge;
1541         resp.base.max_recv_wr     = attr.cap.max_recv_wr;
1542         resp.base.max_send_wr     = attr.cap.max_send_wr;
1543         resp.base.max_inline_data = attr.cap.max_inline_data;
1544
1545         resp.response_length = offsetof(typeof(resp), response_length) +
1546                                sizeof(resp.response_length);
1547
1548         ret = cb(file, &resp, ucore);
1549         if (ret)
1550                 goto err_cb;
1551
1552         if (xrcd) {
1553                 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object,
1554                                           uobject);
1555                 atomic_inc(&obj->uxrcd->refcnt);
1556                 uobj_put_read(xrcd_uobj);
1557         }
1558
1559         if (pd)
1560                 uobj_put_obj_read(pd);
1561         if (scq)
1562                 uobj_put_obj_read(scq);
1563         if (rcq && rcq != scq)
1564                 uobj_put_obj_read(rcq);
1565         if (srq)
1566                 uobj_put_obj_read(srq);
1567         if (ind_tbl)
1568                 uobj_put_obj_read(ind_tbl);
1569
1570         uobj_alloc_commit(&obj->uevent.uobject);
1571
1572         return 0;
1573 err_cb:
1574         ib_destroy_qp(qp);
1575
1576 err_put:
1577         if (!IS_ERR(xrcd_uobj))
1578                 uobj_put_read(xrcd_uobj);
1579         if (pd)
1580                 uobj_put_obj_read(pd);
1581         if (scq)
1582                 uobj_put_obj_read(scq);
1583         if (rcq && rcq != scq)
1584                 uobj_put_obj_read(rcq);
1585         if (srq)
1586                 uobj_put_obj_read(srq);
1587         if (ind_tbl)
1588                 uobj_put_obj_read(ind_tbl);
1589
1590         uobj_alloc_abort(&obj->uevent.uobject);
1591         return ret;
1592 }
1593
1594 static int ib_uverbs_create_qp_cb(struct ib_uverbs_file *file,
1595                                   struct ib_uverbs_ex_create_qp_resp *resp,
1596                                   struct ib_udata *ucore)
1597 {
1598         if (ib_copy_to_udata(ucore, &resp->base, sizeof(resp->base)))
1599                 return -EFAULT;
1600
1601         return 0;
1602 }
1603
1604 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1605                             struct ib_device *ib_dev,
1606                             const char __user *buf, int in_len,
1607                             int out_len)
1608 {
1609         struct ib_uverbs_create_qp      cmd;
1610         struct ib_uverbs_ex_create_qp   cmd_ex;
1611         struct ib_udata                 ucore;
1612         struct ib_udata                 uhw;
1613         ssize_t resp_size = sizeof(struct ib_uverbs_create_qp_resp);
1614         int                             err;
1615
1616         if (out_len < resp_size)
1617                 return -ENOSPC;
1618
1619         if (copy_from_user(&cmd, buf, sizeof(cmd)))
1620                 return -EFAULT;
1621
1622         INIT_UDATA(&ucore, buf, (unsigned long)cmd.response, sizeof(cmd),
1623                    resp_size);
1624         INIT_UDATA(&uhw, buf + sizeof(cmd),
1625                    (unsigned long)cmd.response + resp_size,
1626                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
1627                    out_len - resp_size);
1628
1629         memset(&cmd_ex, 0, sizeof(cmd_ex));
1630         cmd_ex.user_handle = cmd.user_handle;
1631         cmd_ex.pd_handle = cmd.pd_handle;
1632         cmd_ex.send_cq_handle = cmd.send_cq_handle;
1633         cmd_ex.recv_cq_handle = cmd.recv_cq_handle;
1634         cmd_ex.srq_handle = cmd.srq_handle;
1635         cmd_ex.max_send_wr = cmd.max_send_wr;
1636         cmd_ex.max_recv_wr = cmd.max_recv_wr;
1637         cmd_ex.max_send_sge = cmd.max_send_sge;
1638         cmd_ex.max_recv_sge = cmd.max_recv_sge;
1639         cmd_ex.max_inline_data = cmd.max_inline_data;
1640         cmd_ex.sq_sig_all = cmd.sq_sig_all;
1641         cmd_ex.qp_type = cmd.qp_type;
1642         cmd_ex.is_srq = cmd.is_srq;
1643
1644         err = create_qp(file, &ucore, &uhw, &cmd_ex,
1645                         offsetof(typeof(cmd_ex), is_srq) +
1646                         sizeof(cmd.is_srq), ib_uverbs_create_qp_cb,
1647                         NULL);
1648
1649         if (err)
1650                 return err;
1651
1652         return in_len;
1653 }
1654
1655 static int ib_uverbs_ex_create_qp_cb(struct ib_uverbs_file *file,
1656                                      struct ib_uverbs_ex_create_qp_resp *resp,
1657                                      struct ib_udata *ucore)
1658 {
1659         if (ib_copy_to_udata(ucore, resp, resp->response_length))
1660                 return -EFAULT;
1661
1662         return 0;
1663 }
1664
1665 int ib_uverbs_ex_create_qp(struct ib_uverbs_file *file,
1666                            struct ib_device *ib_dev,
1667                            struct ib_udata *ucore,
1668                            struct ib_udata *uhw)
1669 {
1670         struct ib_uverbs_ex_create_qp_resp resp;
1671         struct ib_uverbs_ex_create_qp cmd = {0};
1672         int err;
1673
1674         if (ucore->inlen < (offsetof(typeof(cmd), comp_mask) +
1675                             sizeof(cmd.comp_mask)))
1676                 return -EINVAL;
1677
1678         err = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
1679         if (err)
1680                 return err;
1681
1682         if (cmd.comp_mask & ~IB_UVERBS_CREATE_QP_SUP_COMP_MASK)
1683                 return -EINVAL;
1684
1685         if (cmd.reserved)
1686                 return -EINVAL;
1687
1688         if (ucore->outlen < (offsetof(typeof(resp), response_length) +
1689                              sizeof(resp.response_length)))
1690                 return -ENOSPC;
1691
1692         err = create_qp(file, ucore, uhw, &cmd,
1693                         min(ucore->inlen, sizeof(cmd)),
1694                         ib_uverbs_ex_create_qp_cb, NULL);
1695
1696         if (err)
1697                 return err;
1698
1699         return 0;
1700 }
1701
1702 ssize_t ib_uverbs_open_qp(struct ib_uverbs_file *file,
1703                           struct ib_device *ib_dev,
1704                           const char __user *buf, int in_len, int out_len)
1705 {
1706         struct ib_uverbs_open_qp        cmd;
1707         struct ib_uverbs_create_qp_resp resp;
1708         struct ib_udata                 udata;
1709         struct ib_uqp_object           *obj;
1710         struct ib_xrcd                 *xrcd;
1711         struct ib_uobject              *uninitialized_var(xrcd_uobj);
1712         struct ib_qp                   *qp;
1713         struct ib_qp_open_attr          attr;
1714         int ret;
1715
1716         if (out_len < sizeof resp)
1717                 return -ENOSPC;
1718
1719         if (copy_from_user(&cmd, buf, sizeof cmd))
1720                 return -EFAULT;
1721
1722         INIT_UDATA(&udata, buf + sizeof cmd,
1723                    (unsigned long) cmd.response + sizeof resp,
1724                    in_len - sizeof cmd, out_len - sizeof resp);
1725
1726         obj  = (struct ib_uqp_object *)uobj_alloc(uobj_get_type(qp),
1727                                                   file->ucontext);
1728         if (IS_ERR(obj))
1729                 return PTR_ERR(obj);
1730
1731         xrcd_uobj = uobj_get_read(uobj_get_type(xrcd), cmd.pd_handle,
1732                                   file->ucontext);
1733         if (IS_ERR(xrcd_uobj)) {
1734                 ret = -EINVAL;
1735                 goto err_put;
1736         }
1737
1738         xrcd = (struct ib_xrcd *)xrcd_uobj->object;
1739         if (!xrcd) {
1740                 ret = -EINVAL;
1741                 goto err_xrcd;
1742         }
1743
1744         attr.event_handler = ib_uverbs_qp_event_handler;
1745         attr.qp_context    = file;
1746         attr.qp_num        = cmd.qpn;
1747         attr.qp_type       = cmd.qp_type;
1748
1749         obj->uevent.events_reported = 0;
1750         INIT_LIST_HEAD(&obj->uevent.event_list);
1751         INIT_LIST_HEAD(&obj->mcast_list);
1752
1753         qp = ib_open_qp(xrcd, &attr);
1754         if (IS_ERR(qp)) {
1755                 ret = PTR_ERR(qp);
1756                 goto err_xrcd;
1757         }
1758
1759         obj->uevent.uobject.object = qp;
1760         obj->uevent.uobject.user_handle = cmd.user_handle;
1761
1762         memset(&resp, 0, sizeof resp);
1763         resp.qpn       = qp->qp_num;
1764         resp.qp_handle = obj->uevent.uobject.id;
1765
1766         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1767                          &resp, sizeof resp)) {
1768                 ret = -EFAULT;
1769                 goto err_destroy;
1770         }
1771
1772         obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
1773         atomic_inc(&obj->uxrcd->refcnt);
1774         qp->uobject = &obj->uevent.uobject;
1775         uobj_put_read(xrcd_uobj);
1776
1777
1778         uobj_alloc_commit(&obj->uevent.uobject);
1779
1780         return in_len;
1781
1782 err_destroy:
1783         ib_destroy_qp(qp);
1784 err_xrcd:
1785         uobj_put_read(xrcd_uobj);
1786 err_put:
1787         uobj_alloc_abort(&obj->uevent.uobject);
1788         return ret;
1789 }
1790
1791 ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
1792                            struct ib_device *ib_dev,
1793                            const char __user *buf, int in_len,
1794                            int out_len)
1795 {
1796         struct ib_uverbs_query_qp      cmd;
1797         struct ib_uverbs_query_qp_resp resp;
1798         struct ib_qp                   *qp;
1799         struct ib_qp_attr              *attr;
1800         struct ib_qp_init_attr         *init_attr;
1801         int                            ret;
1802
1803         if (copy_from_user(&cmd, buf, sizeof cmd))
1804                 return -EFAULT;
1805
1806         attr      = kmalloc(sizeof *attr, GFP_KERNEL);
1807         init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1808         if (!attr || !init_attr) {
1809                 ret = -ENOMEM;
1810                 goto out;
1811         }
1812
1813         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
1814         if (!qp) {
1815                 ret = -EINVAL;
1816                 goto out;
1817         }
1818
1819         ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1820
1821         uobj_put_obj_read(qp);
1822
1823         if (ret)
1824                 goto out;
1825
1826         memset(&resp, 0, sizeof resp);
1827
1828         resp.qp_state               = attr->qp_state;
1829         resp.cur_qp_state           = attr->cur_qp_state;
1830         resp.path_mtu               = attr->path_mtu;
1831         resp.path_mig_state         = attr->path_mig_state;
1832         resp.qkey                   = attr->qkey;
1833         resp.rq_psn                 = attr->rq_psn;
1834         resp.sq_psn                 = attr->sq_psn;
1835         resp.dest_qp_num            = attr->dest_qp_num;
1836         resp.qp_access_flags        = attr->qp_access_flags;
1837         resp.pkey_index             = attr->pkey_index;
1838         resp.alt_pkey_index         = attr->alt_pkey_index;
1839         resp.sq_draining            = attr->sq_draining;
1840         resp.max_rd_atomic          = attr->max_rd_atomic;
1841         resp.max_dest_rd_atomic     = attr->max_dest_rd_atomic;
1842         resp.min_rnr_timer          = attr->min_rnr_timer;
1843         resp.port_num               = attr->port_num;
1844         resp.timeout                = attr->timeout;
1845         resp.retry_cnt              = attr->retry_cnt;
1846         resp.rnr_retry              = attr->rnr_retry;
1847         resp.alt_port_num           = attr->alt_port_num;
1848         resp.alt_timeout            = attr->alt_timeout;
1849
1850         memcpy(resp.dest.dgid, attr->ah_attr.grh.dgid.raw, 16);
1851         resp.dest.flow_label        = attr->ah_attr.grh.flow_label;
1852         resp.dest.sgid_index        = attr->ah_attr.grh.sgid_index;
1853         resp.dest.hop_limit         = attr->ah_attr.grh.hop_limit;
1854         resp.dest.traffic_class     = attr->ah_attr.grh.traffic_class;
1855         resp.dest.dlid              = attr->ah_attr.dlid;
1856         resp.dest.sl                = attr->ah_attr.sl;
1857         resp.dest.src_path_bits     = attr->ah_attr.src_path_bits;
1858         resp.dest.static_rate       = attr->ah_attr.static_rate;
1859         resp.dest.is_global         = !!(attr->ah_attr.ah_flags & IB_AH_GRH);
1860         resp.dest.port_num          = attr->ah_attr.port_num;
1861
1862         memcpy(resp.alt_dest.dgid, attr->alt_ah_attr.grh.dgid.raw, 16);
1863         resp.alt_dest.flow_label    = attr->alt_ah_attr.grh.flow_label;
1864         resp.alt_dest.sgid_index    = attr->alt_ah_attr.grh.sgid_index;
1865         resp.alt_dest.hop_limit     = attr->alt_ah_attr.grh.hop_limit;
1866         resp.alt_dest.traffic_class = attr->alt_ah_attr.grh.traffic_class;
1867         resp.alt_dest.dlid          = attr->alt_ah_attr.dlid;
1868         resp.alt_dest.sl            = attr->alt_ah_attr.sl;
1869         resp.alt_dest.src_path_bits = attr->alt_ah_attr.src_path_bits;
1870         resp.alt_dest.static_rate   = attr->alt_ah_attr.static_rate;
1871         resp.alt_dest.is_global     = !!(attr->alt_ah_attr.ah_flags & IB_AH_GRH);
1872         resp.alt_dest.port_num      = attr->alt_ah_attr.port_num;
1873
1874         resp.max_send_wr            = init_attr->cap.max_send_wr;
1875         resp.max_recv_wr            = init_attr->cap.max_recv_wr;
1876         resp.max_send_sge           = init_attr->cap.max_send_sge;
1877         resp.max_recv_sge           = init_attr->cap.max_recv_sge;
1878         resp.max_inline_data        = init_attr->cap.max_inline_data;
1879         resp.sq_sig_all             = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1880
1881         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1882                          &resp, sizeof resp))
1883                 ret = -EFAULT;
1884
1885 out:
1886         kfree(attr);
1887         kfree(init_attr);
1888
1889         return ret ? ret : in_len;
1890 }
1891
1892 /* Remove ignored fields set in the attribute mask */
1893 static int modify_qp_mask(enum ib_qp_type qp_type, int mask)
1894 {
1895         switch (qp_type) {
1896         case IB_QPT_XRC_INI:
1897                 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER);
1898         case IB_QPT_XRC_TGT:
1899                 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT |
1900                                 IB_QP_RNR_RETRY);
1901         default:
1902                 return mask;
1903         }
1904 }
1905
1906 static int modify_qp(struct ib_uverbs_file *file,
1907                      struct ib_uverbs_ex_modify_qp *cmd, struct ib_udata *udata)
1908 {
1909         struct ib_qp_attr *attr;
1910         struct ib_qp *qp;
1911         int ret;
1912
1913         attr = kmalloc(sizeof *attr, GFP_KERNEL);
1914         if (!attr)
1915                 return -ENOMEM;
1916
1917         qp = uobj_get_obj_read(qp, cmd->base.qp_handle, file->ucontext);
1918         if (!qp) {
1919                 ret = -EINVAL;
1920                 goto out;
1921         }
1922
1923         attr->qp_state            = cmd->base.qp_state;
1924         attr->cur_qp_state        = cmd->base.cur_qp_state;
1925         attr->path_mtu            = cmd->base.path_mtu;
1926         attr->path_mig_state      = cmd->base.path_mig_state;
1927         attr->qkey                = cmd->base.qkey;
1928         attr->rq_psn              = cmd->base.rq_psn;
1929         attr->sq_psn              = cmd->base.sq_psn;
1930         attr->dest_qp_num         = cmd->base.dest_qp_num;
1931         attr->qp_access_flags     = cmd->base.qp_access_flags;
1932         attr->pkey_index          = cmd->base.pkey_index;
1933         attr->alt_pkey_index      = cmd->base.alt_pkey_index;
1934         attr->en_sqd_async_notify = cmd->base.en_sqd_async_notify;
1935         attr->max_rd_atomic       = cmd->base.max_rd_atomic;
1936         attr->max_dest_rd_atomic  = cmd->base.max_dest_rd_atomic;
1937         attr->min_rnr_timer       = cmd->base.min_rnr_timer;
1938         attr->port_num            = cmd->base.port_num;
1939         attr->timeout             = cmd->base.timeout;
1940         attr->retry_cnt           = cmd->base.retry_cnt;
1941         attr->rnr_retry           = cmd->base.rnr_retry;
1942         attr->alt_port_num        = cmd->base.alt_port_num;
1943         attr->alt_timeout         = cmd->base.alt_timeout;
1944         attr->rate_limit          = cmd->rate_limit;
1945
1946         memcpy(attr->ah_attr.grh.dgid.raw, cmd->base.dest.dgid, 16);
1947         attr->ah_attr.grh.flow_label    = cmd->base.dest.flow_label;
1948         attr->ah_attr.grh.sgid_index    = cmd->base.dest.sgid_index;
1949         attr->ah_attr.grh.hop_limit     = cmd->base.dest.hop_limit;
1950         attr->ah_attr.grh.traffic_class = cmd->base.dest.traffic_class;
1951         attr->ah_attr.dlid              = cmd->base.dest.dlid;
1952         attr->ah_attr.sl                = cmd->base.dest.sl;
1953         attr->ah_attr.src_path_bits     = cmd->base.dest.src_path_bits;
1954         attr->ah_attr.static_rate       = cmd->base.dest.static_rate;
1955         attr->ah_attr.ah_flags          = cmd->base.dest.is_global ?
1956                                           IB_AH_GRH : 0;
1957         attr->ah_attr.port_num          = cmd->base.dest.port_num;
1958
1959         memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd->base.alt_dest.dgid, 16);
1960         attr->alt_ah_attr.grh.flow_label    = cmd->base.alt_dest.flow_label;
1961         attr->alt_ah_attr.grh.sgid_index    = cmd->base.alt_dest.sgid_index;
1962         attr->alt_ah_attr.grh.hop_limit     = cmd->base.alt_dest.hop_limit;
1963         attr->alt_ah_attr.grh.traffic_class = cmd->base.alt_dest.traffic_class;
1964         attr->alt_ah_attr.dlid              = cmd->base.alt_dest.dlid;
1965         attr->alt_ah_attr.sl                = cmd->base.alt_dest.sl;
1966         attr->alt_ah_attr.src_path_bits     = cmd->base.alt_dest.src_path_bits;
1967         attr->alt_ah_attr.static_rate       = cmd->base.alt_dest.static_rate;
1968         attr->alt_ah_attr.ah_flags          = cmd->base.alt_dest.is_global ?
1969                                               IB_AH_GRH : 0;
1970         attr->alt_ah_attr.port_num          = cmd->base.alt_dest.port_num;
1971
1972         if (qp->real_qp == qp) {
1973                 if (cmd->base.attr_mask & IB_QP_AV) {
1974                         ret = ib_resolve_eth_dmac(qp->device, &attr->ah_attr);
1975                         if (ret)
1976                                 goto release_qp;
1977                 }
1978                 ret = qp->device->modify_qp(qp, attr,
1979                                             modify_qp_mask(qp->qp_type,
1980                                                            cmd->base.attr_mask),
1981                                             udata);
1982         } else {
1983                 ret = ib_modify_qp(qp, attr,
1984                                    modify_qp_mask(qp->qp_type,
1985                                                   cmd->base.attr_mask));
1986         }
1987
1988 release_qp:
1989         uobj_put_obj_read(qp);
1990
1991 out:
1992         kfree(attr);
1993
1994         return ret;
1995 }
1996
1997 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
1998                             struct ib_device *ib_dev,
1999                             const char __user *buf, int in_len,
2000                             int out_len)
2001 {
2002         struct ib_uverbs_ex_modify_qp cmd = {};
2003         struct ib_udata udata;
2004         int ret;
2005
2006         if (copy_from_user(&cmd.base, buf, sizeof(cmd.base)))
2007                 return -EFAULT;
2008
2009         if (cmd.base.attr_mask &
2010             ~((IB_USER_LEGACY_LAST_QP_ATTR_MASK << 1) - 1))
2011                 return -EOPNOTSUPP;
2012
2013         INIT_UDATA(&udata, buf + sizeof(cmd.base), NULL,
2014                    in_len - sizeof(cmd.base), out_len);
2015
2016         ret = modify_qp(file, &cmd, &udata);
2017         if (ret)
2018                 return ret;
2019
2020         return in_len;
2021 }
2022
2023 int ib_uverbs_ex_modify_qp(struct ib_uverbs_file *file,
2024                            struct ib_device *ib_dev,
2025                            struct ib_udata *ucore,
2026                            struct ib_udata *uhw)
2027 {
2028         struct ib_uverbs_ex_modify_qp cmd = {};
2029         int ret;
2030
2031         /*
2032          * Last bit is reserved for extending the attr_mask by
2033          * using another field.
2034          */
2035         BUILD_BUG_ON(IB_USER_LAST_QP_ATTR_MASK == (1 << 31));
2036
2037         if (ucore->inlen < sizeof(cmd.base))
2038                 return -EINVAL;
2039
2040         ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
2041         if (ret)
2042                 return ret;
2043
2044         if (cmd.base.attr_mask &
2045             ~((IB_USER_LAST_QP_ATTR_MASK << 1) - 1))
2046                 return -EOPNOTSUPP;
2047
2048         if (ucore->inlen > sizeof(cmd)) {
2049                 if (ib_is_udata_cleared(ucore, sizeof(cmd),
2050                                         ucore->inlen - sizeof(cmd)))
2051                         return -EOPNOTSUPP;
2052         }
2053
2054         ret = modify_qp(file, &cmd, uhw);
2055
2056         return ret;
2057 }
2058
2059 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
2060                              struct ib_device *ib_dev,
2061                              const char __user *buf, int in_len,
2062                              int out_len)
2063 {
2064         struct ib_uverbs_destroy_qp      cmd;
2065         struct ib_uverbs_destroy_qp_resp resp;
2066         struct ib_uobject               *uobj;
2067         struct ib_qp                    *qp;
2068         struct ib_uqp_object            *obj;
2069         int                              ret = -EINVAL;
2070
2071         if (copy_from_user(&cmd, buf, sizeof cmd))
2072                 return -EFAULT;
2073
2074         memset(&resp, 0, sizeof resp);
2075
2076         uobj  = uobj_get_write(uobj_get_type(qp), cmd.qp_handle,
2077                                file->ucontext);
2078         if (IS_ERR(uobj))
2079                 return PTR_ERR(uobj);
2080
2081         qp  = uobj->object;
2082         obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
2083         /*
2084          * Make sure we don't free the memory in remove_commit as we still
2085          * needs the uobject memory to create the response.
2086          */
2087         uverbs_uobject_get(uobj);
2088
2089         ret = uobj_remove_commit(uobj);
2090         if (ret) {
2091                 uverbs_uobject_put(uobj);
2092                 return ret;
2093         }
2094
2095         resp.events_reported = obj->uevent.events_reported;
2096         uverbs_uobject_put(uobj);
2097
2098         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2099                          &resp, sizeof resp))
2100                 return -EFAULT;
2101
2102         return in_len;
2103 }
2104
2105 static void *alloc_wr(size_t wr_size, __u32 num_sge)
2106 {
2107         if (num_sge >= (U32_MAX - ALIGN(wr_size, sizeof (struct ib_sge))) /
2108                        sizeof (struct ib_sge))
2109                 return NULL;
2110
2111         return kmalloc(ALIGN(wr_size, sizeof (struct ib_sge)) +
2112                          num_sge * sizeof (struct ib_sge), GFP_KERNEL);
2113 }
2114
2115 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
2116                             struct ib_device *ib_dev,
2117                             const char __user *buf, int in_len,
2118                             int out_len)
2119 {
2120         struct ib_uverbs_post_send      cmd;
2121         struct ib_uverbs_post_send_resp resp;
2122         struct ib_uverbs_send_wr       *user_wr;
2123         struct ib_send_wr              *wr = NULL, *last, *next, *bad_wr;
2124         struct ib_qp                   *qp;
2125         int                             i, sg_ind;
2126         int                             is_ud;
2127         ssize_t                         ret = -EINVAL;
2128         size_t                          next_size;
2129
2130         if (copy_from_user(&cmd, buf, sizeof cmd))
2131                 return -EFAULT;
2132
2133         if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
2134             cmd.sge_count * sizeof (struct ib_uverbs_sge))
2135                 return -EINVAL;
2136
2137         if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
2138                 return -EINVAL;
2139
2140         user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
2141         if (!user_wr)
2142                 return -ENOMEM;
2143
2144         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
2145         if (!qp)
2146                 goto out;
2147
2148         is_ud = qp->qp_type == IB_QPT_UD;
2149         sg_ind = 0;
2150         last = NULL;
2151         for (i = 0; i < cmd.wr_count; ++i) {
2152                 if (copy_from_user(user_wr,
2153                                    buf + sizeof cmd + i * cmd.wqe_size,
2154                                    cmd.wqe_size)) {
2155                         ret = -EFAULT;
2156                         goto out_put;
2157                 }
2158
2159                 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
2160                         ret = -EINVAL;
2161                         goto out_put;
2162                 }
2163
2164                 if (is_ud) {
2165                         struct ib_ud_wr *ud;
2166
2167                         if (user_wr->opcode != IB_WR_SEND &&
2168                             user_wr->opcode != IB_WR_SEND_WITH_IMM) {
2169                                 ret = -EINVAL;
2170                                 goto out_put;
2171                         }
2172
2173                         next_size = sizeof(*ud);
2174                         ud = alloc_wr(next_size, user_wr->num_sge);
2175                         if (!ud) {
2176                                 ret = -ENOMEM;
2177                                 goto out_put;
2178                         }
2179
2180                         ud->ah = uobj_get_obj_read(ah, user_wr->wr.ud.ah,
2181                                                    file->ucontext);
2182                         if (!ud->ah) {
2183                                 kfree(ud);
2184                                 ret = -EINVAL;
2185                                 goto out_put;
2186                         }
2187                         ud->remote_qpn = user_wr->wr.ud.remote_qpn;
2188                         ud->remote_qkey = user_wr->wr.ud.remote_qkey;
2189
2190                         next = &ud->wr;
2191                 } else if (user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM ||
2192                            user_wr->opcode == IB_WR_RDMA_WRITE ||
2193                            user_wr->opcode == IB_WR_RDMA_READ) {
2194                         struct ib_rdma_wr *rdma;
2195
2196                         next_size = sizeof(*rdma);
2197                         rdma = alloc_wr(next_size, user_wr->num_sge);
2198                         if (!rdma) {
2199                                 ret = -ENOMEM;
2200                                 goto out_put;
2201                         }
2202
2203                         rdma->remote_addr = user_wr->wr.rdma.remote_addr;
2204                         rdma->rkey = user_wr->wr.rdma.rkey;
2205
2206                         next = &rdma->wr;
2207                 } else if (user_wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP ||
2208                            user_wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) {
2209                         struct ib_atomic_wr *atomic;
2210
2211                         next_size = sizeof(*atomic);
2212                         atomic = alloc_wr(next_size, user_wr->num_sge);
2213                         if (!atomic) {
2214                                 ret = -ENOMEM;
2215                                 goto out_put;
2216                         }
2217
2218                         atomic->remote_addr = user_wr->wr.atomic.remote_addr;
2219                         atomic->compare_add = user_wr->wr.atomic.compare_add;
2220                         atomic->swap = user_wr->wr.atomic.swap;
2221                         atomic->rkey = user_wr->wr.atomic.rkey;
2222
2223                         next = &atomic->wr;
2224                 } else if (user_wr->opcode == IB_WR_SEND ||
2225                            user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2226                            user_wr->opcode == IB_WR_SEND_WITH_INV) {
2227                         next_size = sizeof(*next);
2228                         next = alloc_wr(next_size, user_wr->num_sge);
2229                         if (!next) {
2230                                 ret = -ENOMEM;
2231                                 goto out_put;
2232                         }
2233                 } else {
2234                         ret = -EINVAL;
2235                         goto out_put;
2236                 }
2237
2238                 if (user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2239                     user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) {
2240                         next->ex.imm_data =
2241                                         (__be32 __force) user_wr->ex.imm_data;
2242                 } else if (user_wr->opcode == IB_WR_SEND_WITH_INV) {
2243                         next->ex.invalidate_rkey = user_wr->ex.invalidate_rkey;
2244                 }
2245
2246                 if (!last)
2247                         wr = next;
2248                 else
2249                         last->next = next;
2250                 last = next;
2251
2252                 next->next       = NULL;
2253                 next->wr_id      = user_wr->wr_id;
2254                 next->num_sge    = user_wr->num_sge;
2255                 next->opcode     = user_wr->opcode;
2256                 next->send_flags = user_wr->send_flags;
2257
2258                 if (next->num_sge) {
2259                         next->sg_list = (void *) next +
2260                                 ALIGN(next_size, sizeof(struct ib_sge));
2261                         if (copy_from_user(next->sg_list,
2262                                            buf + sizeof cmd +
2263                                            cmd.wr_count * cmd.wqe_size +
2264                                            sg_ind * sizeof (struct ib_sge),
2265                                            next->num_sge * sizeof (struct ib_sge))) {
2266                                 ret = -EFAULT;
2267                                 goto out_put;
2268                         }
2269                         sg_ind += next->num_sge;
2270                 } else
2271                         next->sg_list = NULL;
2272         }
2273
2274         resp.bad_wr = 0;
2275         ret = qp->device->post_send(qp->real_qp, wr, &bad_wr);
2276         if (ret)
2277                 for (next = wr; next; next = next->next) {
2278                         ++resp.bad_wr;
2279                         if (next == bad_wr)
2280                                 break;
2281                 }
2282
2283         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2284                          &resp, sizeof resp))
2285                 ret = -EFAULT;
2286
2287 out_put:
2288         uobj_put_obj_read(qp);
2289
2290         while (wr) {
2291                 if (is_ud && ud_wr(wr)->ah)
2292                         uobj_put_obj_read(ud_wr(wr)->ah);
2293                 next = wr->next;
2294                 kfree(wr);
2295                 wr = next;
2296         }
2297
2298 out:
2299         kfree(user_wr);
2300
2301         return ret ? ret : in_len;
2302 }
2303
2304 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
2305                                                     int in_len,
2306                                                     u32 wr_count,
2307                                                     u32 sge_count,
2308                                                     u32 wqe_size)
2309 {
2310         struct ib_uverbs_recv_wr *user_wr;
2311         struct ib_recv_wr        *wr = NULL, *last, *next;
2312         int                       sg_ind;
2313         int                       i;
2314         int                       ret;
2315
2316         if (in_len < wqe_size * wr_count +
2317             sge_count * sizeof (struct ib_uverbs_sge))
2318                 return ERR_PTR(-EINVAL);
2319
2320         if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
2321                 return ERR_PTR(-EINVAL);
2322
2323         user_wr = kmalloc(wqe_size, GFP_KERNEL);
2324         if (!user_wr)
2325                 return ERR_PTR(-ENOMEM);
2326
2327         sg_ind = 0;
2328         last = NULL;
2329         for (i = 0; i < wr_count; ++i) {
2330                 if (copy_from_user(user_wr, buf + i * wqe_size,
2331                                    wqe_size)) {
2332                         ret = -EFAULT;
2333                         goto err;
2334                 }
2335
2336                 if (user_wr->num_sge + sg_ind > sge_count) {
2337                         ret = -EINVAL;
2338                         goto err;
2339                 }
2340
2341                 if (user_wr->num_sge >=
2342                     (U32_MAX - ALIGN(sizeof *next, sizeof (struct ib_sge))) /
2343                     sizeof (struct ib_sge)) {
2344                         ret = -EINVAL;
2345                         goto err;
2346                 }
2347
2348                 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2349                                user_wr->num_sge * sizeof (struct ib_sge),
2350                                GFP_KERNEL);
2351                 if (!next) {
2352                         ret = -ENOMEM;
2353                         goto err;
2354                 }
2355
2356                 if (!last)
2357                         wr = next;
2358                 else
2359                         last->next = next;
2360                 last = next;
2361
2362                 next->next       = NULL;
2363                 next->wr_id      = user_wr->wr_id;
2364                 next->num_sge    = user_wr->num_sge;
2365
2366                 if (next->num_sge) {
2367                         next->sg_list = (void *) next +
2368                                 ALIGN(sizeof *next, sizeof (struct ib_sge));
2369                         if (copy_from_user(next->sg_list,
2370                                            buf + wr_count * wqe_size +
2371                                            sg_ind * sizeof (struct ib_sge),
2372                                            next->num_sge * sizeof (struct ib_sge))) {
2373                                 ret = -EFAULT;
2374                                 goto err;
2375                         }
2376                         sg_ind += next->num_sge;
2377                 } else
2378                         next->sg_list = NULL;
2379         }
2380
2381         kfree(user_wr);
2382         return wr;
2383
2384 err:
2385         kfree(user_wr);
2386
2387         while (wr) {
2388                 next = wr->next;
2389                 kfree(wr);
2390                 wr = next;
2391         }
2392
2393         return ERR_PTR(ret);
2394 }
2395
2396 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
2397                             struct ib_device *ib_dev,
2398                             const char __user *buf, int in_len,
2399                             int out_len)
2400 {
2401         struct ib_uverbs_post_recv      cmd;
2402         struct ib_uverbs_post_recv_resp resp;
2403         struct ib_recv_wr              *wr, *next, *bad_wr;
2404         struct ib_qp                   *qp;
2405         ssize_t                         ret = -EINVAL;
2406
2407         if (copy_from_user(&cmd, buf, sizeof cmd))
2408                 return -EFAULT;
2409
2410         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2411                                        in_len - sizeof cmd, cmd.wr_count,
2412                                        cmd.sge_count, cmd.wqe_size);
2413         if (IS_ERR(wr))
2414                 return PTR_ERR(wr);
2415
2416         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
2417         if (!qp)
2418                 goto out;
2419
2420         resp.bad_wr = 0;
2421         ret = qp->device->post_recv(qp->real_qp, wr, &bad_wr);
2422
2423         uobj_put_obj_read(qp);
2424         if (ret) {
2425                 for (next = wr; next; next = next->next) {
2426                         ++resp.bad_wr;
2427                         if (next == bad_wr)
2428                                 break;
2429                 }
2430         }
2431
2432         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2433                          &resp, sizeof resp))
2434                 ret = -EFAULT;
2435
2436 out:
2437         while (wr) {
2438                 next = wr->next;
2439                 kfree(wr);
2440                 wr = next;
2441         }
2442
2443         return ret ? ret : in_len;
2444 }
2445
2446 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
2447                                 struct ib_device *ib_dev,
2448                                 const char __user *buf, int in_len,
2449                                 int out_len)
2450 {
2451         struct ib_uverbs_post_srq_recv      cmd;
2452         struct ib_uverbs_post_srq_recv_resp resp;
2453         struct ib_recv_wr                  *wr, *next, *bad_wr;
2454         struct ib_srq                      *srq;
2455         ssize_t                             ret = -EINVAL;
2456
2457         if (copy_from_user(&cmd, buf, sizeof cmd))
2458                 return -EFAULT;
2459
2460         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2461                                        in_len - sizeof cmd, cmd.wr_count,
2462                                        cmd.sge_count, cmd.wqe_size);
2463         if (IS_ERR(wr))
2464                 return PTR_ERR(wr);
2465
2466         srq = uobj_get_obj_read(srq, cmd.srq_handle, file->ucontext);
2467         if (!srq)
2468                 goto out;
2469
2470         resp.bad_wr = 0;
2471         ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
2472
2473         uobj_put_obj_read(srq);
2474
2475         if (ret)
2476                 for (next = wr; next; next = next->next) {
2477                         ++resp.bad_wr;
2478                         if (next == bad_wr)
2479                                 break;
2480                 }
2481
2482         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2483                          &resp, sizeof resp))
2484                 ret = -EFAULT;
2485
2486 out:
2487         while (wr) {
2488                 next = wr->next;
2489                 kfree(wr);
2490                 wr = next;
2491         }
2492
2493         return ret ? ret : in_len;
2494 }
2495
2496 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
2497                             struct ib_device *ib_dev,
2498                             const char __user *buf, int in_len,
2499                             int out_len)
2500 {
2501         struct ib_uverbs_create_ah       cmd;
2502         struct ib_uverbs_create_ah_resp  resp;
2503         struct ib_uobject               *uobj;
2504         struct ib_pd                    *pd;
2505         struct ib_ah                    *ah;
2506         struct ib_ah_attr               attr;
2507         int ret;
2508         struct ib_udata                   udata;
2509
2510         if (out_len < sizeof resp)
2511                 return -ENOSPC;
2512
2513         if (copy_from_user(&cmd, buf, sizeof cmd))
2514                 return -EFAULT;
2515
2516         INIT_UDATA(&udata, buf + sizeof(cmd),
2517                    (unsigned long)cmd.response + sizeof(resp),
2518                    in_len - sizeof(cmd), out_len - sizeof(resp));
2519
2520         uobj  = uobj_alloc(uobj_get_type(ah), file->ucontext);
2521         if (IS_ERR(uobj))
2522                 return PTR_ERR(uobj);
2523
2524         pd = uobj_get_obj_read(pd, cmd.pd_handle, file->ucontext);
2525         if (!pd) {
2526                 ret = -EINVAL;
2527                 goto err;
2528         }
2529
2530         attr.dlid              = cmd.attr.dlid;
2531         attr.sl                = cmd.attr.sl;
2532         attr.src_path_bits     = cmd.attr.src_path_bits;
2533         attr.static_rate       = cmd.attr.static_rate;
2534         attr.ah_flags          = cmd.attr.is_global ? IB_AH_GRH : 0;
2535         attr.port_num          = cmd.attr.port_num;
2536         attr.grh.flow_label    = cmd.attr.grh.flow_label;
2537         attr.grh.sgid_index    = cmd.attr.grh.sgid_index;
2538         attr.grh.hop_limit     = cmd.attr.grh.hop_limit;
2539         attr.grh.traffic_class = cmd.attr.grh.traffic_class;
2540         memset(&attr.dmac, 0, sizeof(attr.dmac));
2541         memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16);
2542
2543         ah = pd->device->create_ah(pd, &attr, &udata);
2544
2545         if (IS_ERR(ah)) {
2546                 ret = PTR_ERR(ah);
2547                 goto err_put;
2548         }
2549
2550         ah->device  = pd->device;
2551         ah->pd      = pd;
2552         atomic_inc(&pd->usecnt);
2553         ah->uobject  = uobj;
2554         uobj->user_handle = cmd.user_handle;
2555         uobj->object = ah;
2556
2557         resp.ah_handle = uobj->id;
2558
2559         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2560                          &resp, sizeof resp)) {
2561                 ret = -EFAULT;
2562                 goto err_copy;
2563         }
2564
2565         uobj_put_obj_read(pd);
2566         uobj_alloc_commit(uobj);
2567
2568         return in_len;
2569
2570 err_copy:
2571         ib_destroy_ah(ah);
2572
2573 err_put:
2574         uobj_put_obj_read(pd);
2575
2576 err:
2577         uobj_alloc_abort(uobj);
2578         return ret;
2579 }
2580
2581 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
2582                              struct ib_device *ib_dev,
2583                              const char __user *buf, int in_len, int out_len)
2584 {
2585         struct ib_uverbs_destroy_ah cmd;
2586         struct ib_uobject          *uobj;
2587         int                         ret;
2588
2589         if (copy_from_user(&cmd, buf, sizeof cmd))
2590                 return -EFAULT;
2591
2592         uobj  = uobj_get_write(uobj_get_type(ah), cmd.ah_handle,
2593                                file->ucontext);
2594         if (IS_ERR(uobj))
2595                 return PTR_ERR(uobj);
2596
2597         ret = uobj_remove_commit(uobj);
2598         return ret ?: in_len;
2599 }
2600
2601 ssize_t ib_uverbs_attach_mcast(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_attach_mcast cmd;
2607         struct ib_qp                 *qp;
2608         struct ib_uqp_object         *obj;
2609         struct ib_uverbs_mcast_entry *mcast;
2610         int                           ret;
2611
2612         if (copy_from_user(&cmd, buf, sizeof cmd))
2613                 return -EFAULT;
2614
2615         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
2616         if (!qp)
2617                 return -EINVAL;
2618
2619         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2620
2621         mutex_lock(&obj->mcast_lock);
2622         list_for_each_entry(mcast, &obj->mcast_list, list)
2623                 if (cmd.mlid == mcast->lid &&
2624                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2625                         ret = 0;
2626                         goto out_put;
2627                 }
2628
2629         mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
2630         if (!mcast) {
2631                 ret = -ENOMEM;
2632                 goto out_put;
2633         }
2634
2635         mcast->lid = cmd.mlid;
2636         memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
2637
2638         ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
2639         if (!ret)
2640                 list_add_tail(&mcast->list, &obj->mcast_list);
2641         else
2642                 kfree(mcast);
2643
2644 out_put:
2645         mutex_unlock(&obj->mcast_lock);
2646         uobj_put_obj_read(qp);
2647
2648         return ret ? ret : in_len;
2649 }
2650
2651 ssize_t ib_uverbs_detach_mcast(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_detach_mcast cmd;
2657         struct ib_uqp_object         *obj;
2658         struct ib_qp                 *qp;
2659         struct ib_uverbs_mcast_entry *mcast;
2660         int                           ret = -EINVAL;
2661         bool                          found = false;
2662
2663         if (copy_from_user(&cmd, buf, sizeof cmd))
2664                 return -EFAULT;
2665
2666         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
2667         if (!qp)
2668                 return -EINVAL;
2669
2670         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2671         mutex_lock(&obj->mcast_lock);
2672
2673         list_for_each_entry(mcast, &obj->mcast_list, list)
2674                 if (cmd.mlid == mcast->lid &&
2675                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2676                         list_del(&mcast->list);
2677                         kfree(mcast);
2678                         found = true;
2679                         break;
2680                 }
2681
2682         if (!found) {
2683                 ret = -EINVAL;
2684                 goto out_put;
2685         }
2686
2687         ret = ib_detach_mcast(qp, (union ib_gid *)cmd.gid, cmd.mlid);
2688
2689 out_put:
2690         mutex_unlock(&obj->mcast_lock);
2691         uobj_put_obj_read(qp);
2692         return ret ? ret : in_len;
2693 }
2694
2695 static int kern_spec_to_ib_spec_action(struct ib_uverbs_flow_spec *kern_spec,
2696                                        union ib_flow_spec *ib_spec)
2697 {
2698         ib_spec->type = kern_spec->type;
2699         switch (ib_spec->type) {
2700         case IB_FLOW_SPEC_ACTION_TAG:
2701                 if (kern_spec->flow_tag.size !=
2702                     sizeof(struct ib_uverbs_flow_spec_action_tag))
2703                         return -EINVAL;
2704
2705                 ib_spec->flow_tag.size = sizeof(struct ib_flow_spec_action_tag);
2706                 ib_spec->flow_tag.tag_id = kern_spec->flow_tag.tag_id;
2707                 break;
2708         case IB_FLOW_SPEC_ACTION_DROP:
2709                 if (kern_spec->drop.size !=
2710                     sizeof(struct ib_uverbs_flow_spec_action_drop))
2711                         return -EINVAL;
2712
2713                 ib_spec->drop.size = sizeof(struct ib_flow_spec_action_drop);
2714                 break;
2715         default:
2716                 return -EINVAL;
2717         }
2718         return 0;
2719 }
2720
2721 static size_t kern_spec_filter_sz(struct ib_uverbs_flow_spec_hdr *spec)
2722 {
2723         /* Returns user space filter size, includes padding */
2724         return (spec->size - sizeof(struct ib_uverbs_flow_spec_hdr)) / 2;
2725 }
2726
2727 static ssize_t spec_filter_size(void *kern_spec_filter, u16 kern_filter_size,
2728                                 u16 ib_real_filter_sz)
2729 {
2730         /*
2731          * User space filter structures must be 64 bit aligned, otherwise this
2732          * may pass, but we won't handle additional new attributes.
2733          */
2734
2735         if (kern_filter_size > ib_real_filter_sz) {
2736                 if (memchr_inv(kern_spec_filter +
2737                                ib_real_filter_sz, 0,
2738                                kern_filter_size - ib_real_filter_sz))
2739                         return -EINVAL;
2740                 return ib_real_filter_sz;
2741         }
2742         return kern_filter_size;
2743 }
2744
2745 static int kern_spec_to_ib_spec_filter(struct ib_uverbs_flow_spec *kern_spec,
2746                                        union ib_flow_spec *ib_spec)
2747 {
2748         ssize_t actual_filter_sz;
2749         ssize_t kern_filter_sz;
2750         ssize_t ib_filter_sz;
2751         void *kern_spec_mask;
2752         void *kern_spec_val;
2753
2754         if (kern_spec->reserved)
2755                 return -EINVAL;
2756
2757         ib_spec->type = kern_spec->type;
2758
2759         kern_filter_sz = kern_spec_filter_sz(&kern_spec->hdr);
2760         /* User flow spec size must be aligned to 4 bytes */
2761         if (kern_filter_sz != ALIGN(kern_filter_sz, 4))
2762                 return -EINVAL;
2763
2764         kern_spec_val = (void *)kern_spec +
2765                 sizeof(struct ib_uverbs_flow_spec_hdr);
2766         kern_spec_mask = kern_spec_val + kern_filter_sz;
2767         if (ib_spec->type == (IB_FLOW_SPEC_INNER | IB_FLOW_SPEC_VXLAN_TUNNEL))
2768                 return -EINVAL;
2769
2770         switch (ib_spec->type & ~IB_FLOW_SPEC_INNER) {
2771         case IB_FLOW_SPEC_ETH:
2772                 ib_filter_sz = offsetof(struct ib_flow_eth_filter, real_sz);
2773                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2774                                                     kern_filter_sz,
2775                                                     ib_filter_sz);
2776                 if (actual_filter_sz <= 0)
2777                         return -EINVAL;
2778                 ib_spec->size = sizeof(struct ib_flow_spec_eth);
2779                 memcpy(&ib_spec->eth.val, kern_spec_val, actual_filter_sz);
2780                 memcpy(&ib_spec->eth.mask, kern_spec_mask, actual_filter_sz);
2781                 break;
2782         case IB_FLOW_SPEC_IPV4:
2783                 ib_filter_sz = offsetof(struct ib_flow_ipv4_filter, real_sz);
2784                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2785                                                     kern_filter_sz,
2786                                                     ib_filter_sz);
2787                 if (actual_filter_sz <= 0)
2788                         return -EINVAL;
2789                 ib_spec->size = sizeof(struct ib_flow_spec_ipv4);
2790                 memcpy(&ib_spec->ipv4.val, kern_spec_val, actual_filter_sz);
2791                 memcpy(&ib_spec->ipv4.mask, kern_spec_mask, actual_filter_sz);
2792                 break;
2793         case IB_FLOW_SPEC_IPV6:
2794                 ib_filter_sz = offsetof(struct ib_flow_ipv6_filter, real_sz);
2795                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2796                                                     kern_filter_sz,
2797                                                     ib_filter_sz);
2798                 if (actual_filter_sz <= 0)
2799                         return -EINVAL;
2800                 ib_spec->size = sizeof(struct ib_flow_spec_ipv6);
2801                 memcpy(&ib_spec->ipv6.val, kern_spec_val, actual_filter_sz);
2802                 memcpy(&ib_spec->ipv6.mask, kern_spec_mask, actual_filter_sz);
2803
2804                 if ((ntohl(ib_spec->ipv6.mask.flow_label)) >= BIT(20) ||
2805                     (ntohl(ib_spec->ipv6.val.flow_label)) >= BIT(20))
2806                         return -EINVAL;
2807                 break;
2808         case IB_FLOW_SPEC_TCP:
2809         case IB_FLOW_SPEC_UDP:
2810                 ib_filter_sz = offsetof(struct ib_flow_tcp_udp_filter, real_sz);
2811                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2812                                                     kern_filter_sz,
2813                                                     ib_filter_sz);
2814                 if (actual_filter_sz <= 0)
2815                         return -EINVAL;
2816                 ib_spec->size = sizeof(struct ib_flow_spec_tcp_udp);
2817                 memcpy(&ib_spec->tcp_udp.val, kern_spec_val, actual_filter_sz);
2818                 memcpy(&ib_spec->tcp_udp.mask, kern_spec_mask, actual_filter_sz);
2819                 break;
2820         case IB_FLOW_SPEC_VXLAN_TUNNEL:
2821                 ib_filter_sz = offsetof(struct ib_flow_tunnel_filter, real_sz);
2822                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2823                                                     kern_filter_sz,
2824                                                     ib_filter_sz);
2825                 if (actual_filter_sz <= 0)
2826                         return -EINVAL;
2827                 ib_spec->tunnel.size = sizeof(struct ib_flow_spec_tunnel);
2828                 memcpy(&ib_spec->tunnel.val, kern_spec_val, actual_filter_sz);
2829                 memcpy(&ib_spec->tunnel.mask, kern_spec_mask, actual_filter_sz);
2830
2831                 if ((ntohl(ib_spec->tunnel.mask.tunnel_id)) >= BIT(24) ||
2832                     (ntohl(ib_spec->tunnel.val.tunnel_id)) >= BIT(24))
2833                         return -EINVAL;
2834                 break;
2835         default:
2836                 return -EINVAL;
2837         }
2838         return 0;
2839 }
2840
2841 static int kern_spec_to_ib_spec(struct ib_uverbs_flow_spec *kern_spec,
2842                                 union ib_flow_spec *ib_spec)
2843 {
2844         if (kern_spec->reserved)
2845                 return -EINVAL;
2846
2847         if (kern_spec->type >= IB_FLOW_SPEC_ACTION_TAG)
2848                 return kern_spec_to_ib_spec_action(kern_spec, ib_spec);
2849         else
2850                 return kern_spec_to_ib_spec_filter(kern_spec, ib_spec);
2851 }
2852
2853 int ib_uverbs_ex_create_wq(struct ib_uverbs_file *file,
2854                            struct ib_device *ib_dev,
2855                            struct ib_udata *ucore,
2856                            struct ib_udata *uhw)
2857 {
2858         struct ib_uverbs_ex_create_wq     cmd = {};
2859         struct ib_uverbs_ex_create_wq_resp resp = {};
2860         struct ib_uwq_object           *obj;
2861         int err = 0;
2862         struct ib_cq *cq;
2863         struct ib_pd *pd;
2864         struct ib_wq *wq;
2865         struct ib_wq_init_attr wq_init_attr = {};
2866         size_t required_cmd_sz;
2867         size_t required_resp_len;
2868
2869         required_cmd_sz = offsetof(typeof(cmd), max_sge) + sizeof(cmd.max_sge);
2870         required_resp_len = offsetof(typeof(resp), wqn) + sizeof(resp.wqn);
2871
2872         if (ucore->inlen < required_cmd_sz)
2873                 return -EINVAL;
2874
2875         if (ucore->outlen < required_resp_len)
2876                 return -ENOSPC;
2877
2878         if (ucore->inlen > sizeof(cmd) &&
2879             !ib_is_udata_cleared(ucore, sizeof(cmd),
2880                                  ucore->inlen - sizeof(cmd)))
2881                 return -EOPNOTSUPP;
2882
2883         err = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
2884         if (err)
2885                 return err;
2886
2887         if (cmd.comp_mask)
2888                 return -EOPNOTSUPP;
2889
2890         obj  = (struct ib_uwq_object *)uobj_alloc(uobj_get_type(wq),
2891                                                   file->ucontext);
2892         if (IS_ERR(obj))
2893                 return PTR_ERR(obj);
2894
2895         pd  = uobj_get_obj_read(pd, cmd.pd_handle, file->ucontext);
2896         if (!pd) {
2897                 err = -EINVAL;
2898                 goto err_uobj;
2899         }
2900
2901         cq = uobj_get_obj_read(cq, cmd.cq_handle, file->ucontext);
2902         if (!cq) {
2903                 err = -EINVAL;
2904                 goto err_put_pd;
2905         }
2906
2907         wq_init_attr.cq = cq;
2908         wq_init_attr.max_sge = cmd.max_sge;
2909         wq_init_attr.max_wr = cmd.max_wr;
2910         wq_init_attr.wq_context = file;
2911         wq_init_attr.wq_type = cmd.wq_type;
2912         wq_init_attr.event_handler = ib_uverbs_wq_event_handler;
2913         if (ucore->inlen >= (offsetof(typeof(cmd), create_flags) +
2914                              sizeof(cmd.create_flags)))
2915                 wq_init_attr.create_flags = cmd.create_flags;
2916         obj->uevent.events_reported = 0;
2917         INIT_LIST_HEAD(&obj->uevent.event_list);
2918         wq = pd->device->create_wq(pd, &wq_init_attr, uhw);
2919         if (IS_ERR(wq)) {
2920                 err = PTR_ERR(wq);
2921                 goto err_put_cq;
2922         }
2923
2924         wq->uobject = &obj->uevent.uobject;
2925         obj->uevent.uobject.object = wq;
2926         wq->wq_type = wq_init_attr.wq_type;
2927         wq->cq = cq;
2928         wq->pd = pd;
2929         wq->device = pd->device;
2930         wq->wq_context = wq_init_attr.wq_context;
2931         atomic_set(&wq->usecnt, 0);
2932         atomic_inc(&pd->usecnt);
2933         atomic_inc(&cq->usecnt);
2934         wq->uobject = &obj->uevent.uobject;
2935         obj->uevent.uobject.object = wq;
2936
2937         memset(&resp, 0, sizeof(resp));
2938         resp.wq_handle = obj->uevent.uobject.id;
2939         resp.max_sge = wq_init_attr.max_sge;
2940         resp.max_wr = wq_init_attr.max_wr;
2941         resp.wqn = wq->wq_num;
2942         resp.response_length = required_resp_len;
2943         err = ib_copy_to_udata(ucore,
2944                                &resp, resp.response_length);
2945         if (err)
2946                 goto err_copy;
2947
2948         uobj_put_obj_read(pd);
2949         uobj_put_obj_read(cq);
2950         uobj_alloc_commit(&obj->uevent.uobject);
2951         return 0;
2952
2953 err_copy:
2954         ib_destroy_wq(wq);
2955 err_put_cq:
2956         uobj_put_obj_read(cq);
2957 err_put_pd:
2958         uobj_put_obj_read(pd);
2959 err_uobj:
2960         uobj_alloc_abort(&obj->uevent.uobject);
2961
2962         return err;
2963 }
2964
2965 int ib_uverbs_ex_destroy_wq(struct ib_uverbs_file *file,
2966                             struct ib_device *ib_dev,
2967                             struct ib_udata *ucore,
2968                             struct ib_udata *uhw)
2969 {
2970         struct ib_uverbs_ex_destroy_wq  cmd = {};
2971         struct ib_uverbs_ex_destroy_wq_resp     resp = {};
2972         struct ib_wq                    *wq;
2973         struct ib_uobject               *uobj;
2974         struct ib_uwq_object            *obj;
2975         size_t required_cmd_sz;
2976         size_t required_resp_len;
2977         int                             ret;
2978
2979         required_cmd_sz = offsetof(typeof(cmd), wq_handle) + sizeof(cmd.wq_handle);
2980         required_resp_len = offsetof(typeof(resp), reserved) + sizeof(resp.reserved);
2981
2982         if (ucore->inlen < required_cmd_sz)
2983                 return -EINVAL;
2984
2985         if (ucore->outlen < required_resp_len)
2986                 return -ENOSPC;
2987
2988         if (ucore->inlen > sizeof(cmd) &&
2989             !ib_is_udata_cleared(ucore, sizeof(cmd),
2990                                  ucore->inlen - sizeof(cmd)))
2991                 return -EOPNOTSUPP;
2992
2993         ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
2994         if (ret)
2995                 return ret;
2996
2997         if (cmd.comp_mask)
2998                 return -EOPNOTSUPP;
2999
3000         resp.response_length = required_resp_len;
3001         uobj  = uobj_get_write(uobj_get_type(wq), cmd.wq_handle,
3002                                file->ucontext);
3003         if (IS_ERR(uobj))
3004                 return PTR_ERR(uobj);
3005
3006         wq = uobj->object;
3007         obj = container_of(uobj, struct ib_uwq_object, uevent.uobject);
3008         /*
3009          * Make sure we don't free the memory in remove_commit as we still
3010          * needs the uobject memory to create the response.
3011          */
3012         uverbs_uobject_get(uobj);
3013
3014         ret = uobj_remove_commit(uobj);
3015         resp.events_reported = obj->uevent.events_reported;
3016         uverbs_uobject_put(uobj);
3017         if (ret)
3018                 return ret;
3019
3020         return ib_copy_to_udata(ucore, &resp, resp.response_length);
3021 }
3022
3023 int ib_uverbs_ex_modify_wq(struct ib_uverbs_file *file,
3024                            struct ib_device *ib_dev,
3025                            struct ib_udata *ucore,
3026                            struct ib_udata *uhw)
3027 {
3028         struct ib_uverbs_ex_modify_wq cmd = {};
3029         struct ib_wq *wq;
3030         struct ib_wq_attr wq_attr = {};
3031         size_t required_cmd_sz;
3032         int ret;
3033
3034         required_cmd_sz = offsetof(typeof(cmd), curr_wq_state) + sizeof(cmd.curr_wq_state);
3035         if (ucore->inlen < required_cmd_sz)
3036                 return -EINVAL;
3037
3038         if (ucore->inlen > sizeof(cmd) &&
3039             !ib_is_udata_cleared(ucore, sizeof(cmd),
3040                                  ucore->inlen - sizeof(cmd)))
3041                 return -EOPNOTSUPP;
3042
3043         ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
3044         if (ret)
3045                 return ret;
3046
3047         if (!cmd.attr_mask)
3048                 return -EINVAL;
3049
3050         if (cmd.attr_mask > (IB_WQ_STATE | IB_WQ_CUR_STATE | IB_WQ_FLAGS))
3051                 return -EINVAL;
3052
3053         wq = uobj_get_obj_read(wq, cmd.wq_handle, file->ucontext);
3054         if (!wq)
3055                 return -EINVAL;
3056
3057         wq_attr.curr_wq_state = cmd.curr_wq_state;
3058         wq_attr.wq_state = cmd.wq_state;
3059         if (cmd.attr_mask & IB_WQ_FLAGS) {
3060                 wq_attr.flags = cmd.flags;
3061                 wq_attr.flags_mask = cmd.flags_mask;
3062         }
3063         ret = wq->device->modify_wq(wq, &wq_attr, cmd.attr_mask, uhw);
3064         uobj_put_obj_read(wq);
3065         return ret;
3066 }
3067
3068 int ib_uverbs_ex_create_rwq_ind_table(struct ib_uverbs_file *file,
3069                                       struct ib_device *ib_dev,
3070                                       struct ib_udata *ucore,
3071                                       struct ib_udata *uhw)
3072 {
3073         struct ib_uverbs_ex_create_rwq_ind_table          cmd = {};
3074         struct ib_uverbs_ex_create_rwq_ind_table_resp  resp = {};
3075         struct ib_uobject                 *uobj;
3076         int err = 0;
3077         struct ib_rwq_ind_table_init_attr init_attr = {};
3078         struct ib_rwq_ind_table *rwq_ind_tbl;
3079         struct ib_wq    **wqs = NULL;
3080         u32 *wqs_handles = NULL;
3081         struct ib_wq    *wq = NULL;
3082         int i, j, num_read_wqs;
3083         u32 num_wq_handles;
3084         u32 expected_in_size;
3085         size_t required_cmd_sz_header;
3086         size_t required_resp_len;
3087
3088         required_cmd_sz_header = offsetof(typeof(cmd), log_ind_tbl_size) + sizeof(cmd.log_ind_tbl_size);
3089         required_resp_len = offsetof(typeof(resp), ind_tbl_num) + sizeof(resp.ind_tbl_num);
3090
3091         if (ucore->inlen < required_cmd_sz_header)
3092                 return -EINVAL;
3093
3094         if (ucore->outlen < required_resp_len)
3095                 return -ENOSPC;
3096
3097         err = ib_copy_from_udata(&cmd, ucore, required_cmd_sz_header);
3098         if (err)
3099                 return err;
3100
3101         ucore->inbuf += required_cmd_sz_header;
3102         ucore->inlen -= required_cmd_sz_header;
3103
3104         if (cmd.comp_mask)
3105                 return -EOPNOTSUPP;
3106
3107         if (cmd.log_ind_tbl_size > IB_USER_VERBS_MAX_LOG_IND_TBL_SIZE)
3108                 return -EINVAL;
3109
3110         num_wq_handles = 1 << cmd.log_ind_tbl_size;
3111         expected_in_size = num_wq_handles * sizeof(__u32);
3112         if (num_wq_handles == 1)
3113                 /* input size for wq handles is u64 aligned */
3114                 expected_in_size += sizeof(__u32);
3115
3116         if (ucore->inlen < expected_in_size)
3117                 return -EINVAL;
3118
3119         if (ucore->inlen > expected_in_size &&
3120             !ib_is_udata_cleared(ucore, expected_in_size,
3121                                  ucore->inlen - expected_in_size))
3122                 return -EOPNOTSUPP;
3123
3124         wqs_handles = kcalloc(num_wq_handles, sizeof(*wqs_handles),
3125                               GFP_KERNEL);
3126         if (!wqs_handles)
3127                 return -ENOMEM;
3128
3129         err = ib_copy_from_udata(wqs_handles, ucore,
3130                                  num_wq_handles * sizeof(__u32));
3131         if (err)
3132                 goto err_free;
3133
3134         wqs = kcalloc(num_wq_handles, sizeof(*wqs), GFP_KERNEL);
3135         if (!wqs) {
3136                 err = -ENOMEM;
3137                 goto  err_free;
3138         }
3139
3140         for (num_read_wqs = 0; num_read_wqs < num_wq_handles;
3141                         num_read_wqs++) {
3142                 wq = uobj_get_obj_read(wq, wqs_handles[num_read_wqs],
3143                                        file->ucontext);
3144                 if (!wq) {
3145                         err = -EINVAL;
3146                         goto put_wqs;
3147                 }
3148
3149                 wqs[num_read_wqs] = wq;
3150         }
3151
3152         uobj  = uobj_alloc(uobj_get_type(rwq_ind_table), file->ucontext);
3153         if (IS_ERR(uobj)) {
3154                 err = PTR_ERR(uobj);
3155                 goto put_wqs;
3156         }
3157
3158         init_attr.log_ind_tbl_size = cmd.log_ind_tbl_size;
3159         init_attr.ind_tbl = wqs;
3160         rwq_ind_tbl = ib_dev->create_rwq_ind_table(ib_dev, &init_attr, uhw);
3161
3162         if (IS_ERR(rwq_ind_tbl)) {
3163                 err = PTR_ERR(rwq_ind_tbl);
3164                 goto err_uobj;
3165         }
3166
3167         rwq_ind_tbl->ind_tbl = wqs;
3168         rwq_ind_tbl->log_ind_tbl_size = init_attr.log_ind_tbl_size;
3169         rwq_ind_tbl->uobject = uobj;
3170         uobj->object = rwq_ind_tbl;
3171         rwq_ind_tbl->device = ib_dev;
3172         atomic_set(&rwq_ind_tbl->usecnt, 0);
3173
3174         for (i = 0; i < num_wq_handles; i++)
3175                 atomic_inc(&wqs[i]->usecnt);
3176
3177         resp.ind_tbl_handle = uobj->id;
3178         resp.ind_tbl_num = rwq_ind_tbl->ind_tbl_num;
3179         resp.response_length = required_resp_len;
3180
3181         err = ib_copy_to_udata(ucore,
3182                                &resp, resp.response_length);
3183         if (err)
3184                 goto err_copy;
3185
3186         kfree(wqs_handles);
3187
3188         for (j = 0; j < num_read_wqs; j++)
3189                 uobj_put_obj_read(wqs[j]);
3190
3191         uobj_alloc_commit(uobj);
3192         return 0;
3193
3194 err_copy:
3195         ib_destroy_rwq_ind_table(rwq_ind_tbl);
3196 err_uobj:
3197         uobj_alloc_abort(uobj);
3198 put_wqs:
3199         for (j = 0; j < num_read_wqs; j++)
3200                 uobj_put_obj_read(wqs[j]);
3201 err_free:
3202         kfree(wqs_handles);
3203         kfree(wqs);
3204         return err;
3205 }
3206
3207 int ib_uverbs_ex_destroy_rwq_ind_table(struct ib_uverbs_file *file,
3208                                        struct ib_device *ib_dev,
3209                                        struct ib_udata *ucore,
3210                                        struct ib_udata *uhw)
3211 {
3212         struct ib_uverbs_ex_destroy_rwq_ind_table       cmd = {};
3213         struct ib_uobject               *uobj;
3214         int                     ret;
3215         size_t required_cmd_sz;
3216
3217         required_cmd_sz = offsetof(typeof(cmd), ind_tbl_handle) + sizeof(cmd.ind_tbl_handle);
3218
3219         if (ucore->inlen < required_cmd_sz)
3220                 return -EINVAL;
3221
3222         if (ucore->inlen > sizeof(cmd) &&
3223             !ib_is_udata_cleared(ucore, sizeof(cmd),
3224                                  ucore->inlen - sizeof(cmd)))
3225                 return -EOPNOTSUPP;
3226
3227         ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
3228         if (ret)
3229                 return ret;
3230
3231         if (cmd.comp_mask)
3232                 return -EOPNOTSUPP;
3233
3234         uobj  = uobj_get_write(uobj_get_type(rwq_ind_table), cmd.ind_tbl_handle,
3235                                file->ucontext);
3236         if (IS_ERR(uobj))
3237                 return PTR_ERR(uobj);
3238
3239         return uobj_remove_commit(uobj);
3240 }
3241
3242 int ib_uverbs_ex_create_flow(struct ib_uverbs_file *file,
3243                              struct ib_device *ib_dev,
3244                              struct ib_udata *ucore,
3245                              struct ib_udata *uhw)
3246 {
3247         struct ib_uverbs_create_flow      cmd;
3248         struct ib_uverbs_create_flow_resp resp;
3249         struct ib_uobject                 *uobj;
3250         struct ib_flow                    *flow_id;
3251         struct ib_uverbs_flow_attr        *kern_flow_attr;
3252         struct ib_flow_attr               *flow_attr;
3253         struct ib_qp                      *qp;
3254         int err = 0;
3255         void *kern_spec;
3256         void *ib_spec;
3257         int i;
3258
3259         if (ucore->inlen < sizeof(cmd))
3260                 return -EINVAL;
3261
3262         if (ucore->outlen < sizeof(resp))
3263                 return -ENOSPC;
3264
3265         err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3266         if (err)
3267                 return err;
3268
3269         ucore->inbuf += sizeof(cmd);
3270         ucore->inlen -= sizeof(cmd);
3271
3272         if (cmd.comp_mask)
3273                 return -EINVAL;
3274
3275         if (!capable(CAP_NET_RAW))
3276                 return -EPERM;
3277
3278         if (cmd.flow_attr.flags >= IB_FLOW_ATTR_FLAGS_RESERVED)
3279                 return -EINVAL;
3280
3281         if ((cmd.flow_attr.flags & IB_FLOW_ATTR_FLAGS_DONT_TRAP) &&
3282             ((cmd.flow_attr.type == IB_FLOW_ATTR_ALL_DEFAULT) ||
3283              (cmd.flow_attr.type == IB_FLOW_ATTR_MC_DEFAULT)))
3284                 return -EINVAL;
3285
3286         if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS)
3287                 return -EINVAL;
3288
3289         if (cmd.flow_attr.size > ucore->inlen ||
3290             cmd.flow_attr.size >
3291             (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec)))
3292                 return -EINVAL;
3293
3294         if (cmd.flow_attr.reserved[0] ||
3295             cmd.flow_attr.reserved[1])
3296                 return -EINVAL;
3297
3298         if (cmd.flow_attr.num_of_specs) {
3299                 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size,
3300                                          GFP_KERNEL);
3301                 if (!kern_flow_attr)
3302                         return -ENOMEM;
3303
3304                 memcpy(kern_flow_attr, &cmd.flow_attr, sizeof(*kern_flow_attr));
3305                 err = ib_copy_from_udata(kern_flow_attr + 1, ucore,
3306                                          cmd.flow_attr.size);
3307                 if (err)
3308                         goto err_free_attr;
3309         } else {
3310                 kern_flow_attr = &cmd.flow_attr;
3311         }
3312
3313         uobj  = uobj_alloc(uobj_get_type(flow), file->ucontext);
3314         if (IS_ERR(uobj)) {
3315                 err = PTR_ERR(uobj);
3316                 goto err_free_attr;
3317         }
3318
3319         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
3320         if (!qp) {
3321                 err = -EINVAL;
3322                 goto err_uobj;
3323         }
3324
3325         flow_attr = kzalloc(sizeof(*flow_attr) + cmd.flow_attr.num_of_specs *
3326                             sizeof(union ib_flow_spec), GFP_KERNEL);
3327         if (!flow_attr) {
3328                 err = -ENOMEM;
3329                 goto err_put;
3330         }
3331
3332         flow_attr->type = kern_flow_attr->type;
3333         flow_attr->priority = kern_flow_attr->priority;
3334         flow_attr->num_of_specs = kern_flow_attr->num_of_specs;
3335         flow_attr->port = kern_flow_attr->port;
3336         flow_attr->flags = kern_flow_attr->flags;
3337         flow_attr->size = sizeof(*flow_attr);
3338
3339         kern_spec = kern_flow_attr + 1;
3340         ib_spec = flow_attr + 1;
3341         for (i = 0; i < flow_attr->num_of_specs &&
3342              cmd.flow_attr.size > offsetof(struct ib_uverbs_flow_spec, reserved) &&
3343              cmd.flow_attr.size >=
3344              ((struct ib_uverbs_flow_spec *)kern_spec)->size; i++) {
3345                 err = kern_spec_to_ib_spec(kern_spec, ib_spec);
3346                 if (err)
3347                         goto err_free;
3348                 flow_attr->size +=
3349                         ((union ib_flow_spec *) ib_spec)->size;
3350                 cmd.flow_attr.size -= ((struct ib_uverbs_flow_spec *)kern_spec)->size;
3351                 kern_spec += ((struct ib_uverbs_flow_spec *) kern_spec)->size;
3352                 ib_spec += ((union ib_flow_spec *) ib_spec)->size;
3353         }
3354         if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) {
3355                 pr_warn("create flow failed, flow %d: %d bytes left from uverb cmd\n",
3356                         i, cmd.flow_attr.size);
3357                 err = -EINVAL;
3358                 goto err_free;
3359         }
3360         flow_id = ib_create_flow(qp, flow_attr, IB_FLOW_DOMAIN_USER);
3361         if (IS_ERR(flow_id)) {
3362                 err = PTR_ERR(flow_id);
3363                 goto err_free;
3364         }
3365         flow_id->uobject = uobj;
3366         uobj->object = flow_id;
3367
3368         memset(&resp, 0, sizeof(resp));
3369         resp.flow_handle = uobj->id;
3370
3371         err = ib_copy_to_udata(ucore,
3372                                &resp, sizeof(resp));
3373         if (err)
3374                 goto err_copy;
3375
3376         uobj_put_obj_read(qp);
3377         uobj_alloc_commit(uobj);
3378         kfree(flow_attr);
3379         if (cmd.flow_attr.num_of_specs)
3380                 kfree(kern_flow_attr);
3381         return 0;
3382 err_copy:
3383         ib_destroy_flow(flow_id);
3384 err_free:
3385         kfree(flow_attr);
3386 err_put:
3387         uobj_put_obj_read(qp);
3388 err_uobj:
3389         uobj_alloc_abort(uobj);
3390 err_free_attr:
3391         if (cmd.flow_attr.num_of_specs)
3392                 kfree(kern_flow_attr);
3393         return err;
3394 }
3395
3396 int ib_uverbs_ex_destroy_flow(struct ib_uverbs_file *file,
3397                               struct ib_device *ib_dev,
3398                               struct ib_udata *ucore,
3399                               struct ib_udata *uhw)
3400 {
3401         struct ib_uverbs_destroy_flow   cmd;
3402         struct ib_uobject               *uobj;
3403         int                             ret;
3404
3405         if (ucore->inlen < sizeof(cmd))
3406                 return -EINVAL;
3407
3408         ret = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3409         if (ret)
3410                 return ret;
3411
3412         if (cmd.comp_mask)
3413                 return -EINVAL;
3414
3415         uobj  = uobj_get_write(uobj_get_type(flow), cmd.flow_handle,
3416                                file->ucontext);
3417         if (IS_ERR(uobj))
3418                 return PTR_ERR(uobj);
3419
3420         ret = uobj_remove_commit(uobj);
3421         return ret;
3422 }
3423
3424 static int __uverbs_create_xsrq(struct ib_uverbs_file *file,
3425                                 struct ib_device *ib_dev,
3426                                 struct ib_uverbs_create_xsrq *cmd,
3427                                 struct ib_udata *udata)
3428 {
3429         struct ib_uverbs_create_srq_resp resp;
3430         struct ib_usrq_object           *obj;
3431         struct ib_pd                    *pd;
3432         struct ib_srq                   *srq;
3433         struct ib_uobject               *uninitialized_var(xrcd_uobj);
3434         struct ib_srq_init_attr          attr;
3435         int ret;
3436
3437         obj  = (struct ib_usrq_object *)uobj_alloc(uobj_get_type(srq),
3438                                                    file->ucontext);
3439         if (IS_ERR(obj))
3440                 return PTR_ERR(obj);
3441
3442         if (cmd->srq_type == IB_SRQT_XRC) {
3443                 xrcd_uobj = uobj_get_read(uobj_get_type(xrcd), cmd->xrcd_handle,
3444                                           file->ucontext);
3445                 if (IS_ERR(xrcd_uobj)) {
3446                         ret = -EINVAL;
3447                         goto err;
3448                 }
3449
3450                 attr.ext.xrc.xrcd = (struct ib_xrcd *)xrcd_uobj->object;
3451                 if (!attr.ext.xrc.xrcd) {
3452                         ret = -EINVAL;
3453                         goto err_put_xrcd;
3454                 }
3455
3456                 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
3457                 atomic_inc(&obj->uxrcd->refcnt);
3458
3459                 attr.ext.xrc.cq  = uobj_get_obj_read(cq, cmd->cq_handle,
3460                                                      file->ucontext);
3461                 if (!attr.ext.xrc.cq) {
3462                         ret = -EINVAL;
3463                         goto err_put_xrcd;
3464                 }
3465         }
3466
3467         pd  = uobj_get_obj_read(pd, cmd->pd_handle, file->ucontext);
3468         if (!pd) {
3469                 ret = -EINVAL;
3470                 goto err_put_cq;
3471         }
3472
3473         attr.event_handler  = ib_uverbs_srq_event_handler;
3474         attr.srq_context    = file;
3475         attr.srq_type       = cmd->srq_type;
3476         attr.attr.max_wr    = cmd->max_wr;
3477         attr.attr.max_sge   = cmd->max_sge;
3478         attr.attr.srq_limit = cmd->srq_limit;
3479
3480         obj->uevent.events_reported = 0;
3481         INIT_LIST_HEAD(&obj->uevent.event_list);
3482
3483         srq = pd->device->create_srq(pd, &attr, udata);
3484         if (IS_ERR(srq)) {
3485                 ret = PTR_ERR(srq);
3486                 goto err_put;
3487         }
3488
3489         srq->device        = pd->device;
3490         srq->pd            = pd;
3491         srq->srq_type      = cmd->srq_type;
3492         srq->uobject       = &obj->uevent.uobject;
3493         srq->event_handler = attr.event_handler;
3494         srq->srq_context   = attr.srq_context;
3495
3496         if (cmd->srq_type == IB_SRQT_XRC) {
3497                 srq->ext.xrc.cq   = attr.ext.xrc.cq;
3498                 srq->ext.xrc.xrcd = attr.ext.xrc.xrcd;
3499                 atomic_inc(&attr.ext.xrc.cq->usecnt);
3500                 atomic_inc(&attr.ext.xrc.xrcd->usecnt);
3501         }
3502
3503         atomic_inc(&pd->usecnt);
3504         atomic_set(&srq->usecnt, 0);
3505
3506         obj->uevent.uobject.object = srq;
3507         obj->uevent.uobject.user_handle = cmd->user_handle;
3508
3509         memset(&resp, 0, sizeof resp);
3510         resp.srq_handle = obj->uevent.uobject.id;
3511         resp.max_wr     = attr.attr.max_wr;
3512         resp.max_sge    = attr.attr.max_sge;
3513         if (cmd->srq_type == IB_SRQT_XRC)
3514                 resp.srqn = srq->ext.xrc.srq_num;
3515
3516         if (copy_to_user((void __user *) (unsigned long) cmd->response,
3517                          &resp, sizeof resp)) {
3518                 ret = -EFAULT;
3519                 goto err_copy;
3520         }
3521
3522         if (cmd->srq_type == IB_SRQT_XRC) {
3523                 uobj_put_read(xrcd_uobj);
3524                 uobj_put_obj_read(attr.ext.xrc.cq);
3525         }
3526         uobj_put_obj_read(pd);
3527         uobj_alloc_commit(&obj->uevent.uobject);
3528
3529         return 0;
3530
3531 err_copy:
3532         ib_destroy_srq(srq);
3533
3534 err_put:
3535         uobj_put_obj_read(pd);
3536
3537 err_put_cq:
3538         if (cmd->srq_type == IB_SRQT_XRC)
3539                 uobj_put_obj_read(attr.ext.xrc.cq);
3540
3541 err_put_xrcd:
3542         if (cmd->srq_type == IB_SRQT_XRC) {
3543                 atomic_dec(&obj->uxrcd->refcnt);
3544                 uobj_put_read(xrcd_uobj);
3545         }
3546
3547 err:
3548         uobj_alloc_abort(&obj->uevent.uobject);
3549         return ret;
3550 }
3551
3552 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
3553                              struct ib_device *ib_dev,
3554                              const char __user *buf, int in_len,
3555                              int out_len)
3556 {
3557         struct ib_uverbs_create_srq      cmd;
3558         struct ib_uverbs_create_xsrq     xcmd;
3559         struct ib_uverbs_create_srq_resp resp;
3560         struct ib_udata                  udata;
3561         int ret;
3562
3563         if (out_len < sizeof resp)
3564                 return -ENOSPC;
3565
3566         if (copy_from_user(&cmd, buf, sizeof cmd))
3567                 return -EFAULT;
3568
3569         xcmd.response    = cmd.response;
3570         xcmd.user_handle = cmd.user_handle;
3571         xcmd.srq_type    = IB_SRQT_BASIC;
3572         xcmd.pd_handle   = cmd.pd_handle;
3573         xcmd.max_wr      = cmd.max_wr;
3574         xcmd.max_sge     = cmd.max_sge;
3575         xcmd.srq_limit   = cmd.srq_limit;
3576
3577         INIT_UDATA(&udata, buf + sizeof cmd,
3578                    (unsigned long) cmd.response + sizeof resp,
3579                    in_len - sizeof cmd - sizeof(struct ib_uverbs_cmd_hdr),
3580                    out_len - sizeof resp);
3581
3582         ret = __uverbs_create_xsrq(file, ib_dev, &xcmd, &udata);
3583         if (ret)
3584                 return ret;
3585
3586         return in_len;
3587 }
3588
3589 ssize_t ib_uverbs_create_xsrq(struct ib_uverbs_file *file,
3590                               struct ib_device *ib_dev,
3591                               const char __user *buf, int in_len, int out_len)
3592 {
3593         struct ib_uverbs_create_xsrq     cmd;
3594         struct ib_uverbs_create_srq_resp resp;
3595         struct ib_udata                  udata;
3596         int ret;
3597
3598         if (out_len < sizeof resp)
3599                 return -ENOSPC;
3600
3601         if (copy_from_user(&cmd, buf, sizeof cmd))
3602                 return -EFAULT;
3603
3604         INIT_UDATA(&udata, buf + sizeof cmd,
3605                    (unsigned long) cmd.response + sizeof resp,
3606                    in_len - sizeof cmd - sizeof(struct ib_uverbs_cmd_hdr),
3607                    out_len - sizeof resp);
3608
3609         ret = __uverbs_create_xsrq(file, ib_dev, &cmd, &udata);
3610         if (ret)
3611                 return ret;
3612
3613         return in_len;
3614 }
3615
3616 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
3617                              struct ib_device *ib_dev,
3618                              const char __user *buf, int in_len,
3619                              int out_len)
3620 {
3621         struct ib_uverbs_modify_srq cmd;
3622         struct ib_udata             udata;
3623         struct ib_srq              *srq;
3624         struct ib_srq_attr          attr;
3625         int                         ret;
3626
3627         if (copy_from_user(&cmd, buf, sizeof cmd))
3628                 return -EFAULT;
3629
3630         INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
3631                    out_len);
3632
3633         srq = uobj_get_obj_read(srq, cmd.srq_handle, file->ucontext);
3634         if (!srq)
3635                 return -EINVAL;
3636
3637         attr.max_wr    = cmd.max_wr;
3638         attr.srq_limit = cmd.srq_limit;
3639
3640         ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata);
3641
3642         uobj_put_obj_read(srq);
3643
3644         return ret ? ret : in_len;
3645 }
3646
3647 ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
3648                             struct ib_device *ib_dev,
3649                             const char __user *buf,
3650                             int in_len, int out_len)
3651 {
3652         struct ib_uverbs_query_srq      cmd;
3653         struct ib_uverbs_query_srq_resp resp;
3654         struct ib_srq_attr              attr;
3655         struct ib_srq                   *srq;
3656         int                             ret;
3657
3658         if (out_len < sizeof resp)
3659                 return -ENOSPC;
3660
3661         if (copy_from_user(&cmd, buf, sizeof cmd))
3662                 return -EFAULT;
3663
3664         srq = uobj_get_obj_read(srq, cmd.srq_handle, file->ucontext);
3665         if (!srq)
3666                 return -EINVAL;
3667
3668         ret = ib_query_srq(srq, &attr);
3669
3670         uobj_put_obj_read(srq);
3671
3672         if (ret)
3673                 return ret;
3674
3675         memset(&resp, 0, sizeof resp);
3676
3677         resp.max_wr    = attr.max_wr;
3678         resp.max_sge   = attr.max_sge;
3679         resp.srq_limit = attr.srq_limit;
3680
3681         if (copy_to_user((void __user *) (unsigned long) cmd.response,
3682                          &resp, sizeof resp))
3683                 return -EFAULT;
3684
3685         return in_len;
3686 }
3687
3688 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
3689                               struct ib_device *ib_dev,
3690                               const char __user *buf, int in_len,
3691                               int out_len)
3692 {
3693         struct ib_uverbs_destroy_srq      cmd;
3694         struct ib_uverbs_destroy_srq_resp resp;
3695         struct ib_uobject                *uobj;
3696         struct ib_srq                    *srq;
3697         struct ib_uevent_object          *obj;
3698         int                               ret = -EINVAL;
3699         enum ib_srq_type                  srq_type;
3700
3701         if (copy_from_user(&cmd, buf, sizeof cmd))
3702                 return -EFAULT;
3703
3704         uobj  = uobj_get_write(uobj_get_type(srq), cmd.srq_handle,
3705                                file->ucontext);
3706         if (IS_ERR(uobj))
3707                 return PTR_ERR(uobj);
3708
3709         srq = uobj->object;
3710         obj = container_of(uobj, struct ib_uevent_object, uobject);
3711         srq_type = srq->srq_type;
3712         /*
3713          * Make sure we don't free the memory in remove_commit as we still
3714          * needs the uobject memory to create the response.
3715          */
3716         uverbs_uobject_get(uobj);
3717
3718         memset(&resp, 0, sizeof(resp));
3719
3720         ret = uobj_remove_commit(uobj);
3721         if (ret) {
3722                 uverbs_uobject_put(uobj);
3723                 return ret;
3724         }
3725         resp.events_reported = obj->events_reported;
3726         uverbs_uobject_put(uobj);
3727         if (copy_to_user((void __user *)(unsigned long)cmd.response,
3728                          &resp, sizeof(resp)))
3729                 return -EFAULT;
3730
3731         return in_len;
3732 }
3733
3734 int ib_uverbs_ex_query_device(struct ib_uverbs_file *file,
3735                               struct ib_device *ib_dev,
3736                               struct ib_udata *ucore,
3737                               struct ib_udata *uhw)
3738 {
3739         struct ib_uverbs_ex_query_device_resp resp = { {0} };
3740         struct ib_uverbs_ex_query_device  cmd;
3741         struct ib_device_attr attr = {0};
3742         int err;
3743
3744         if (ucore->inlen < sizeof(cmd))
3745                 return -EINVAL;
3746
3747         err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3748         if (err)
3749                 return err;
3750
3751         if (cmd.comp_mask)
3752                 return -EINVAL;
3753
3754         if (cmd.reserved)
3755                 return -EINVAL;
3756
3757         resp.response_length = offsetof(typeof(resp), odp_caps);
3758
3759         if (ucore->outlen < resp.response_length)
3760                 return -ENOSPC;
3761
3762         err = ib_dev->query_device(ib_dev, &attr, uhw);
3763         if (err)
3764                 return err;
3765
3766         copy_query_dev_fields(file, ib_dev, &resp.base, &attr);
3767
3768         if (ucore->outlen < resp.response_length + sizeof(resp.odp_caps))
3769                 goto end;
3770
3771 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
3772         resp.odp_caps.general_caps = attr.odp_caps.general_caps;
3773         resp.odp_caps.per_transport_caps.rc_odp_caps =
3774                 attr.odp_caps.per_transport_caps.rc_odp_caps;
3775         resp.odp_caps.per_transport_caps.uc_odp_caps =
3776                 attr.odp_caps.per_transport_caps.uc_odp_caps;
3777         resp.odp_caps.per_transport_caps.ud_odp_caps =
3778                 attr.odp_caps.per_transport_caps.ud_odp_caps;
3779 #endif
3780         resp.response_length += sizeof(resp.odp_caps);
3781
3782         if (ucore->outlen < resp.response_length + sizeof(resp.timestamp_mask))
3783                 goto end;
3784
3785         resp.timestamp_mask = attr.timestamp_mask;
3786         resp.response_length += sizeof(resp.timestamp_mask);
3787
3788         if (ucore->outlen < resp.response_length + sizeof(resp.hca_core_clock))
3789                 goto end;
3790
3791         resp.hca_core_clock = attr.hca_core_clock;
3792         resp.response_length += sizeof(resp.hca_core_clock);
3793
3794         if (ucore->outlen < resp.response_length + sizeof(resp.device_cap_flags_ex))
3795                 goto end;
3796
3797         resp.device_cap_flags_ex = attr.device_cap_flags;
3798         resp.response_length += sizeof(resp.device_cap_flags_ex);
3799
3800         if (ucore->outlen < resp.response_length + sizeof(resp.rss_caps))
3801                 goto end;
3802
3803         resp.rss_caps.supported_qpts = attr.rss_caps.supported_qpts;
3804         resp.rss_caps.max_rwq_indirection_tables =
3805                 attr.rss_caps.max_rwq_indirection_tables;
3806         resp.rss_caps.max_rwq_indirection_table_size =
3807                 attr.rss_caps.max_rwq_indirection_table_size;
3808
3809         resp.response_length += sizeof(resp.rss_caps);
3810
3811         if (ucore->outlen < resp.response_length + sizeof(resp.max_wq_type_rq))
3812                 goto end;
3813
3814         resp.max_wq_type_rq = attr.max_wq_type_rq;
3815         resp.response_length += sizeof(resp.max_wq_type_rq);
3816
3817         if (ucore->outlen < resp.response_length + sizeof(resp.raw_packet_caps))
3818                 goto end;
3819
3820         resp.raw_packet_caps = attr.raw_packet_caps;
3821         resp.response_length += sizeof(resp.raw_packet_caps);
3822 end:
3823         err = ib_copy_to_udata(ucore, &resp, resp.response_length);
3824         return err;
3825 }