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         int                              ret = -EINVAL;
1300
1301         if (copy_from_user(&cmd, buf, sizeof cmd))
1302                 return -EFAULT;
1303
1304         uobj  = uobj_get_write(uobj_get_type(cq), cmd.cq_handle,
1305                                file->ucontext);
1306         if (IS_ERR(uobj))
1307                 return PTR_ERR(uobj);
1308
1309         /*
1310          * Make sure we don't free the memory in remove_commit as we still
1311          * needs the uobject memory to create the response.
1312          */
1313         uverbs_uobject_get(uobj);
1314         cq      = uobj->object;
1315         obj     = container_of(cq->uobject, struct ib_ucq_object, uobject);
1316
1317         memset(&resp, 0, sizeof(resp));
1318
1319         ret = uobj_remove_commit(uobj);
1320         if (ret) {
1321                 uverbs_uobject_put(uobj);
1322                 return ret;
1323         }
1324
1325         resp.comp_events_reported  = obj->comp_events_reported;
1326         resp.async_events_reported = obj->async_events_reported;
1327
1328         uverbs_uobject_put(uobj);
1329         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1330                          &resp, sizeof resp))
1331                 return -EFAULT;
1332
1333         return in_len;
1334 }
1335
1336 static int create_qp(struct ib_uverbs_file *file,
1337                      struct ib_udata *ucore,
1338                      struct ib_udata *uhw,
1339                      struct ib_uverbs_ex_create_qp *cmd,
1340                      size_t cmd_sz,
1341                      int (*cb)(struct ib_uverbs_file *file,
1342                                struct ib_uverbs_ex_create_qp_resp *resp,
1343                                struct ib_udata *udata),
1344                      void *context)
1345 {
1346         struct ib_uqp_object            *obj;
1347         struct ib_device                *device;
1348         struct ib_pd                    *pd = NULL;
1349         struct ib_xrcd                  *xrcd = NULL;
1350         struct ib_uobject               *xrcd_uobj = ERR_PTR(-ENOENT);
1351         struct ib_cq                    *scq = NULL, *rcq = NULL;
1352         struct ib_srq                   *srq = NULL;
1353         struct ib_qp                    *qp;
1354         char                            *buf;
1355         struct ib_qp_init_attr          attr = {};
1356         struct ib_uverbs_ex_create_qp_resp resp;
1357         int                             ret;
1358         struct ib_rwq_ind_table *ind_tbl = NULL;
1359         bool has_sq = true;
1360
1361         if (cmd->qp_type == IB_QPT_RAW_PACKET && !capable(CAP_NET_RAW))
1362                 return -EPERM;
1363
1364         obj  = (struct ib_uqp_object *)uobj_alloc(uobj_get_type(qp),
1365                                                   file->ucontext);
1366         if (IS_ERR(obj))
1367                 return PTR_ERR(obj);
1368         obj->uxrcd = NULL;
1369         obj->uevent.uobject.user_handle = cmd->user_handle;
1370         mutex_init(&obj->mcast_lock);
1371
1372         if (cmd_sz >= offsetof(typeof(*cmd), rwq_ind_tbl_handle) +
1373                       sizeof(cmd->rwq_ind_tbl_handle) &&
1374                       (cmd->comp_mask & IB_UVERBS_CREATE_QP_MASK_IND_TABLE)) {
1375                 ind_tbl = uobj_get_obj_read(rwq_ind_table,
1376                                             cmd->rwq_ind_tbl_handle,
1377                                             file->ucontext);
1378                 if (!ind_tbl) {
1379                         ret = -EINVAL;
1380                         goto err_put;
1381                 }
1382
1383                 attr.rwq_ind_tbl = ind_tbl;
1384         }
1385
1386         if ((cmd_sz >= offsetof(typeof(*cmd), reserved1) +
1387                        sizeof(cmd->reserved1)) && cmd->reserved1) {
1388                 ret = -EOPNOTSUPP;
1389                 goto err_put;
1390         }
1391
1392         if (ind_tbl && (cmd->max_recv_wr || cmd->max_recv_sge || cmd->is_srq)) {
1393                 ret = -EINVAL;
1394                 goto err_put;
1395         }
1396
1397         if (ind_tbl && !cmd->max_send_wr)
1398                 has_sq = false;
1399
1400         if (cmd->qp_type == IB_QPT_XRC_TGT) {
1401                 xrcd_uobj = uobj_get_read(uobj_get_type(xrcd), cmd->pd_handle,
1402                                           file->ucontext);
1403
1404                 if (IS_ERR(xrcd_uobj)) {
1405                         ret = -EINVAL;
1406                         goto err_put;
1407                 }
1408
1409                 xrcd = (struct ib_xrcd *)xrcd_uobj->object;
1410                 if (!xrcd) {
1411                         ret = -EINVAL;
1412                         goto err_put;
1413                 }
1414                 device = xrcd->device;
1415         } else {
1416                 if (cmd->qp_type == IB_QPT_XRC_INI) {
1417                         cmd->max_recv_wr = 0;
1418                         cmd->max_recv_sge = 0;
1419                 } else {
1420                         if (cmd->is_srq) {
1421                                 srq = uobj_get_obj_read(srq, cmd->srq_handle,
1422                                                         file->ucontext);
1423                                 if (!srq || srq->srq_type != IB_SRQT_BASIC) {
1424                                         ret = -EINVAL;
1425                                         goto err_put;
1426                                 }
1427                         }
1428
1429                         if (!ind_tbl) {
1430                                 if (cmd->recv_cq_handle != cmd->send_cq_handle) {
1431                                         rcq = uobj_get_obj_read(cq, cmd->recv_cq_handle,
1432                                                                 file->ucontext);
1433                                         if (!rcq) {
1434                                                 ret = -EINVAL;
1435                                                 goto err_put;
1436                                         }
1437                                 }
1438                         }
1439                 }
1440
1441                 if (has_sq)
1442                         scq = uobj_get_obj_read(cq, cmd->send_cq_handle,
1443                                                 file->ucontext);
1444                 if (!ind_tbl)
1445                         rcq = rcq ?: scq;
1446                 pd  = uobj_get_obj_read(pd, cmd->pd_handle, file->ucontext);
1447                 if (!pd || (!scq && has_sq)) {
1448                         ret = -EINVAL;
1449                         goto err_put;
1450                 }
1451
1452                 device = pd->device;
1453         }
1454
1455         attr.event_handler = ib_uverbs_qp_event_handler;
1456         attr.qp_context    = file;
1457         attr.send_cq       = scq;
1458         attr.recv_cq       = rcq;
1459         attr.srq           = srq;
1460         attr.xrcd          = xrcd;
1461         attr.sq_sig_type   = cmd->sq_sig_all ? IB_SIGNAL_ALL_WR :
1462                                               IB_SIGNAL_REQ_WR;
1463         attr.qp_type       = cmd->qp_type;
1464         attr.create_flags  = 0;
1465
1466         attr.cap.max_send_wr     = cmd->max_send_wr;
1467         attr.cap.max_recv_wr     = cmd->max_recv_wr;
1468         attr.cap.max_send_sge    = cmd->max_send_sge;
1469         attr.cap.max_recv_sge    = cmd->max_recv_sge;
1470         attr.cap.max_inline_data = cmd->max_inline_data;
1471
1472         obj->uevent.events_reported     = 0;
1473         INIT_LIST_HEAD(&obj->uevent.event_list);
1474         INIT_LIST_HEAD(&obj->mcast_list);
1475
1476         if (cmd_sz >= offsetof(typeof(*cmd), create_flags) +
1477                       sizeof(cmd->create_flags))
1478                 attr.create_flags = cmd->create_flags;
1479
1480         if (attr.create_flags & ~(IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK |
1481                                 IB_QP_CREATE_CROSS_CHANNEL |
1482                                 IB_QP_CREATE_MANAGED_SEND |
1483                                 IB_QP_CREATE_MANAGED_RECV |
1484                                 IB_QP_CREATE_SCATTER_FCS |
1485                                 IB_QP_CREATE_CVLAN_STRIPPING)) {
1486                 ret = -EINVAL;
1487                 goto err_put;
1488         }
1489
1490         buf = (void *)cmd + sizeof(*cmd);
1491         if (cmd_sz > sizeof(*cmd))
1492                 if (!(buf[0] == 0 && !memcmp(buf, buf + 1,
1493                                              cmd_sz - sizeof(*cmd) - 1))) {
1494                         ret = -EINVAL;
1495                         goto err_put;
1496                 }
1497
1498         if (cmd->qp_type == IB_QPT_XRC_TGT)
1499                 qp = ib_create_qp(pd, &attr);
1500         else
1501                 qp = device->create_qp(pd, &attr, uhw);
1502
1503         if (IS_ERR(qp)) {
1504                 ret = PTR_ERR(qp);
1505                 goto err_put;
1506         }
1507
1508         if (cmd->qp_type != IB_QPT_XRC_TGT) {
1509                 ret = ib_create_qp_security(qp, device);
1510                 if (ret)
1511                         goto err_cb;
1512
1513                 qp->real_qp       = qp;
1514                 qp->device        = device;
1515                 qp->pd            = pd;
1516                 qp->send_cq       = attr.send_cq;
1517                 qp->recv_cq       = attr.recv_cq;
1518                 qp->srq           = attr.srq;
1519                 qp->rwq_ind_tbl   = ind_tbl;
1520                 qp->event_handler = attr.event_handler;
1521                 qp->qp_context    = attr.qp_context;
1522                 qp->qp_type       = attr.qp_type;
1523                 atomic_set(&qp->usecnt, 0);
1524                 atomic_inc(&pd->usecnt);
1525                 if (attr.send_cq)
1526                         atomic_inc(&attr.send_cq->usecnt);
1527                 if (attr.recv_cq)
1528                         atomic_inc(&attr.recv_cq->usecnt);
1529                 if (attr.srq)
1530                         atomic_inc(&attr.srq->usecnt);
1531                 if (ind_tbl)
1532                         atomic_inc(&ind_tbl->usecnt);
1533         }
1534         qp->uobject = &obj->uevent.uobject;
1535
1536         obj->uevent.uobject.object = qp;
1537
1538         memset(&resp, 0, sizeof resp);
1539         resp.base.qpn             = qp->qp_num;
1540         resp.base.qp_handle       = obj->uevent.uobject.id;
1541         resp.base.max_recv_sge    = attr.cap.max_recv_sge;
1542         resp.base.max_send_sge    = attr.cap.max_send_sge;
1543         resp.base.max_recv_wr     = attr.cap.max_recv_wr;
1544         resp.base.max_send_wr     = attr.cap.max_send_wr;
1545         resp.base.max_inline_data = attr.cap.max_inline_data;
1546
1547         resp.response_length = offsetof(typeof(resp), response_length) +
1548                                sizeof(resp.response_length);
1549
1550         ret = cb(file, &resp, ucore);
1551         if (ret)
1552                 goto err_cb;
1553
1554         if (xrcd) {
1555                 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object,
1556                                           uobject);
1557                 atomic_inc(&obj->uxrcd->refcnt);
1558                 uobj_put_read(xrcd_uobj);
1559         }
1560
1561         if (pd)
1562                 uobj_put_obj_read(pd);
1563         if (scq)
1564                 uobj_put_obj_read(scq);
1565         if (rcq && rcq != scq)
1566                 uobj_put_obj_read(rcq);
1567         if (srq)
1568                 uobj_put_obj_read(srq);
1569         if (ind_tbl)
1570                 uobj_put_obj_read(ind_tbl);
1571
1572         uobj_alloc_commit(&obj->uevent.uobject);
1573
1574         return 0;
1575 err_cb:
1576         ib_destroy_qp(qp);
1577
1578 err_put:
1579         if (!IS_ERR(xrcd_uobj))
1580                 uobj_put_read(xrcd_uobj);
1581         if (pd)
1582                 uobj_put_obj_read(pd);
1583         if (scq)
1584                 uobj_put_obj_read(scq);
1585         if (rcq && rcq != scq)
1586                 uobj_put_obj_read(rcq);
1587         if (srq)
1588                 uobj_put_obj_read(srq);
1589         if (ind_tbl)
1590                 uobj_put_obj_read(ind_tbl);
1591
1592         uobj_alloc_abort(&obj->uevent.uobject);
1593         return ret;
1594 }
1595
1596 static int ib_uverbs_create_qp_cb(struct ib_uverbs_file *file,
1597                                   struct ib_uverbs_ex_create_qp_resp *resp,
1598                                   struct ib_udata *ucore)
1599 {
1600         if (ib_copy_to_udata(ucore, &resp->base, sizeof(resp->base)))
1601                 return -EFAULT;
1602
1603         return 0;
1604 }
1605
1606 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1607                             struct ib_device *ib_dev,
1608                             const char __user *buf, int in_len,
1609                             int out_len)
1610 {
1611         struct ib_uverbs_create_qp      cmd;
1612         struct ib_uverbs_ex_create_qp   cmd_ex;
1613         struct ib_udata                 ucore;
1614         struct ib_udata                 uhw;
1615         ssize_t resp_size = sizeof(struct ib_uverbs_create_qp_resp);
1616         int                             err;
1617
1618         if (out_len < resp_size)
1619                 return -ENOSPC;
1620
1621         if (copy_from_user(&cmd, buf, sizeof(cmd)))
1622                 return -EFAULT;
1623
1624         INIT_UDATA(&ucore, buf, (unsigned long)cmd.response, sizeof(cmd),
1625                    resp_size);
1626         INIT_UDATA(&uhw, buf + sizeof(cmd),
1627                    (unsigned long)cmd.response + resp_size,
1628                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
1629                    out_len - resp_size);
1630
1631         memset(&cmd_ex, 0, sizeof(cmd_ex));
1632         cmd_ex.user_handle = cmd.user_handle;
1633         cmd_ex.pd_handle = cmd.pd_handle;
1634         cmd_ex.send_cq_handle = cmd.send_cq_handle;
1635         cmd_ex.recv_cq_handle = cmd.recv_cq_handle;
1636         cmd_ex.srq_handle = cmd.srq_handle;
1637         cmd_ex.max_send_wr = cmd.max_send_wr;
1638         cmd_ex.max_recv_wr = cmd.max_recv_wr;
1639         cmd_ex.max_send_sge = cmd.max_send_sge;
1640         cmd_ex.max_recv_sge = cmd.max_recv_sge;
1641         cmd_ex.max_inline_data = cmd.max_inline_data;
1642         cmd_ex.sq_sig_all = cmd.sq_sig_all;
1643         cmd_ex.qp_type = cmd.qp_type;
1644         cmd_ex.is_srq = cmd.is_srq;
1645
1646         err = create_qp(file, &ucore, &uhw, &cmd_ex,
1647                         offsetof(typeof(cmd_ex), is_srq) +
1648                         sizeof(cmd.is_srq), ib_uverbs_create_qp_cb,
1649                         NULL);
1650
1651         if (err)
1652                 return err;
1653
1654         return in_len;
1655 }
1656
1657 static int ib_uverbs_ex_create_qp_cb(struct ib_uverbs_file *file,
1658                                      struct ib_uverbs_ex_create_qp_resp *resp,
1659                                      struct ib_udata *ucore)
1660 {
1661         if (ib_copy_to_udata(ucore, resp, resp->response_length))
1662                 return -EFAULT;
1663
1664         return 0;
1665 }
1666
1667 int ib_uverbs_ex_create_qp(struct ib_uverbs_file *file,
1668                            struct ib_device *ib_dev,
1669                            struct ib_udata *ucore,
1670                            struct ib_udata *uhw)
1671 {
1672         struct ib_uverbs_ex_create_qp_resp resp;
1673         struct ib_uverbs_ex_create_qp cmd = {0};
1674         int err;
1675
1676         if (ucore->inlen < (offsetof(typeof(cmd), comp_mask) +
1677                             sizeof(cmd.comp_mask)))
1678                 return -EINVAL;
1679
1680         err = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
1681         if (err)
1682                 return err;
1683
1684         if (cmd.comp_mask & ~IB_UVERBS_CREATE_QP_SUP_COMP_MASK)
1685                 return -EINVAL;
1686
1687         if (cmd.reserved)
1688                 return -EINVAL;
1689
1690         if (ucore->outlen < (offsetof(typeof(resp), response_length) +
1691                              sizeof(resp.response_length)))
1692                 return -ENOSPC;
1693
1694         err = create_qp(file, ucore, uhw, &cmd,
1695                         min(ucore->inlen, sizeof(cmd)),
1696                         ib_uverbs_ex_create_qp_cb, NULL);
1697
1698         if (err)
1699                 return err;
1700
1701         return 0;
1702 }
1703
1704 ssize_t ib_uverbs_open_qp(struct ib_uverbs_file *file,
1705                           struct ib_device *ib_dev,
1706                           const char __user *buf, int in_len, int out_len)
1707 {
1708         struct ib_uverbs_open_qp        cmd;
1709         struct ib_uverbs_create_qp_resp resp;
1710         struct ib_udata                 udata;
1711         struct ib_uqp_object           *obj;
1712         struct ib_xrcd                 *xrcd;
1713         struct ib_uobject              *uninitialized_var(xrcd_uobj);
1714         struct ib_qp                   *qp;
1715         struct ib_qp_open_attr          attr;
1716         int ret;
1717
1718         if (out_len < sizeof resp)
1719                 return -ENOSPC;
1720
1721         if (copy_from_user(&cmd, buf, sizeof cmd))
1722                 return -EFAULT;
1723
1724         INIT_UDATA(&udata, buf + sizeof cmd,
1725                    (unsigned long) cmd.response + sizeof resp,
1726                    in_len - sizeof cmd, out_len - sizeof resp);
1727
1728         obj  = (struct ib_uqp_object *)uobj_alloc(uobj_get_type(qp),
1729                                                   file->ucontext);
1730         if (IS_ERR(obj))
1731                 return PTR_ERR(obj);
1732
1733         xrcd_uobj = uobj_get_read(uobj_get_type(xrcd), cmd.pd_handle,
1734                                   file->ucontext);
1735         if (IS_ERR(xrcd_uobj)) {
1736                 ret = -EINVAL;
1737                 goto err_put;
1738         }
1739
1740         xrcd = (struct ib_xrcd *)xrcd_uobj->object;
1741         if (!xrcd) {
1742                 ret = -EINVAL;
1743                 goto err_xrcd;
1744         }
1745
1746         attr.event_handler = ib_uverbs_qp_event_handler;
1747         attr.qp_context    = file;
1748         attr.qp_num        = cmd.qpn;
1749         attr.qp_type       = cmd.qp_type;
1750
1751         obj->uevent.events_reported = 0;
1752         INIT_LIST_HEAD(&obj->uevent.event_list);
1753         INIT_LIST_HEAD(&obj->mcast_list);
1754
1755         qp = ib_open_qp(xrcd, &attr);
1756         if (IS_ERR(qp)) {
1757                 ret = PTR_ERR(qp);
1758                 goto err_xrcd;
1759         }
1760
1761         obj->uevent.uobject.object = qp;
1762         obj->uevent.uobject.user_handle = cmd.user_handle;
1763
1764         memset(&resp, 0, sizeof resp);
1765         resp.qpn       = qp->qp_num;
1766         resp.qp_handle = obj->uevent.uobject.id;
1767
1768         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1769                          &resp, sizeof resp)) {
1770                 ret = -EFAULT;
1771                 goto err_destroy;
1772         }
1773
1774         obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
1775         atomic_inc(&obj->uxrcd->refcnt);
1776         qp->uobject = &obj->uevent.uobject;
1777         uobj_put_read(xrcd_uobj);
1778
1779
1780         uobj_alloc_commit(&obj->uevent.uobject);
1781
1782         return in_len;
1783
1784 err_destroy:
1785         ib_destroy_qp(qp);
1786 err_xrcd:
1787         uobj_put_read(xrcd_uobj);
1788 err_put:
1789         uobj_alloc_abort(&obj->uevent.uobject);
1790         return ret;
1791 }
1792
1793 ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
1794                            struct ib_device *ib_dev,
1795                            const char __user *buf, int in_len,
1796                            int out_len)
1797 {
1798         struct ib_uverbs_query_qp      cmd;
1799         struct ib_uverbs_query_qp_resp resp;
1800         struct ib_qp                   *qp;
1801         struct ib_qp_attr              *attr;
1802         struct ib_qp_init_attr         *init_attr;
1803         const struct ib_global_route   *grh;
1804         int                            ret;
1805
1806         if (copy_from_user(&cmd, buf, sizeof cmd))
1807                 return -EFAULT;
1808
1809         attr      = kmalloc(sizeof *attr, GFP_KERNEL);
1810         init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1811         if (!attr || !init_attr) {
1812                 ret = -ENOMEM;
1813                 goto out;
1814         }
1815
1816         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
1817         if (!qp) {
1818                 ret = -EINVAL;
1819                 goto out;
1820         }
1821
1822         ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1823
1824         uobj_put_obj_read(qp);
1825
1826         if (ret)
1827                 goto out;
1828
1829         memset(&resp, 0, sizeof resp);
1830
1831         resp.qp_state               = attr->qp_state;
1832         resp.cur_qp_state           = attr->cur_qp_state;
1833         resp.path_mtu               = attr->path_mtu;
1834         resp.path_mig_state         = attr->path_mig_state;
1835         resp.qkey                   = attr->qkey;
1836         resp.rq_psn                 = attr->rq_psn;
1837         resp.sq_psn                 = attr->sq_psn;
1838         resp.dest_qp_num            = attr->dest_qp_num;
1839         resp.qp_access_flags        = attr->qp_access_flags;
1840         resp.pkey_index             = attr->pkey_index;
1841         resp.alt_pkey_index         = attr->alt_pkey_index;
1842         resp.sq_draining            = attr->sq_draining;
1843         resp.max_rd_atomic          = attr->max_rd_atomic;
1844         resp.max_dest_rd_atomic     = attr->max_dest_rd_atomic;
1845         resp.min_rnr_timer          = attr->min_rnr_timer;
1846         resp.port_num               = attr->port_num;
1847         resp.timeout                = attr->timeout;
1848         resp.retry_cnt              = attr->retry_cnt;
1849         resp.rnr_retry              = attr->rnr_retry;
1850         resp.alt_port_num           = attr->alt_port_num;
1851         resp.alt_timeout            = attr->alt_timeout;
1852
1853         resp.dest.dlid              = rdma_ah_get_dlid(&attr->ah_attr);
1854         resp.dest.sl                = rdma_ah_get_sl(&attr->ah_attr);
1855         resp.dest.src_path_bits     = rdma_ah_get_path_bits(&attr->ah_attr);
1856         resp.dest.static_rate       = rdma_ah_get_static_rate(&attr->ah_attr);
1857         resp.dest.is_global         = !!(rdma_ah_get_ah_flags(&attr->ah_attr) &
1858                                          IB_AH_GRH);
1859         if (resp.dest.is_global) {
1860                 grh = rdma_ah_read_grh(&attr->ah_attr);
1861                 memcpy(resp.dest.dgid, grh->dgid.raw, 16);
1862                 resp.dest.flow_label        = grh->flow_label;
1863                 resp.dest.sgid_index        = grh->sgid_index;
1864                 resp.dest.hop_limit         = grh->hop_limit;
1865                 resp.dest.traffic_class     = grh->traffic_class;
1866         }
1867         resp.dest.port_num          = rdma_ah_get_port_num(&attr->ah_attr);
1868
1869         resp.alt_dest.dlid          = rdma_ah_get_dlid(&attr->alt_ah_attr);
1870         resp.alt_dest.sl            = rdma_ah_get_sl(&attr->alt_ah_attr);
1871         resp.alt_dest.src_path_bits = rdma_ah_get_path_bits(&attr->alt_ah_attr);
1872         resp.alt_dest.static_rate
1873                         = rdma_ah_get_static_rate(&attr->alt_ah_attr);
1874         resp.alt_dest.is_global
1875                         = !!(rdma_ah_get_ah_flags(&attr->alt_ah_attr) &
1876                                                   IB_AH_GRH);
1877         if (resp.alt_dest.is_global) {
1878                 grh = rdma_ah_read_grh(&attr->alt_ah_attr);
1879                 memcpy(resp.alt_dest.dgid, grh->dgid.raw, 16);
1880                 resp.alt_dest.flow_label    = grh->flow_label;
1881                 resp.alt_dest.sgid_index    = grh->sgid_index;
1882                 resp.alt_dest.hop_limit     = grh->hop_limit;
1883                 resp.alt_dest.traffic_class = grh->traffic_class;
1884         }
1885         resp.alt_dest.port_num      = rdma_ah_get_port_num(&attr->alt_ah_attr);
1886
1887         resp.max_send_wr            = init_attr->cap.max_send_wr;
1888         resp.max_recv_wr            = init_attr->cap.max_recv_wr;
1889         resp.max_send_sge           = init_attr->cap.max_send_sge;
1890         resp.max_recv_sge           = init_attr->cap.max_recv_sge;
1891         resp.max_inline_data        = init_attr->cap.max_inline_data;
1892         resp.sq_sig_all             = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1893
1894         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1895                          &resp, sizeof resp))
1896                 ret = -EFAULT;
1897
1898 out:
1899         kfree(attr);
1900         kfree(init_attr);
1901
1902         return ret ? ret : in_len;
1903 }
1904
1905 /* Remove ignored fields set in the attribute mask */
1906 static int modify_qp_mask(enum ib_qp_type qp_type, int mask)
1907 {
1908         switch (qp_type) {
1909         case IB_QPT_XRC_INI:
1910                 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER);
1911         case IB_QPT_XRC_TGT:
1912                 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT |
1913                                 IB_QP_RNR_RETRY);
1914         default:
1915                 return mask;
1916         }
1917 }
1918
1919 static int modify_qp(struct ib_uverbs_file *file,
1920                      struct ib_uverbs_ex_modify_qp *cmd, struct ib_udata *udata)
1921 {
1922         struct ib_qp_attr *attr;
1923         struct ib_qp *qp;
1924         int ret;
1925
1926         attr = kmalloc(sizeof *attr, GFP_KERNEL);
1927         if (!attr)
1928                 return -ENOMEM;
1929
1930         qp = uobj_get_obj_read(qp, cmd->base.qp_handle, file->ucontext);
1931         if (!qp) {
1932                 ret = -EINVAL;
1933                 goto out;
1934         }
1935
1936         if (!rdma_is_port_valid(qp->device, cmd->base.port_num)) {
1937                 ret = -EINVAL;
1938                 goto release_qp;
1939         }
1940
1941         attr->qp_state            = cmd->base.qp_state;
1942         attr->cur_qp_state        = cmd->base.cur_qp_state;
1943         attr->path_mtu            = cmd->base.path_mtu;
1944         attr->path_mig_state      = cmd->base.path_mig_state;
1945         attr->qkey                = cmd->base.qkey;
1946         attr->rq_psn              = cmd->base.rq_psn;
1947         attr->sq_psn              = cmd->base.sq_psn;
1948         attr->dest_qp_num         = cmd->base.dest_qp_num;
1949         attr->qp_access_flags     = cmd->base.qp_access_flags;
1950         attr->pkey_index          = cmd->base.pkey_index;
1951         attr->alt_pkey_index      = cmd->base.alt_pkey_index;
1952         attr->en_sqd_async_notify = cmd->base.en_sqd_async_notify;
1953         attr->max_rd_atomic       = cmd->base.max_rd_atomic;
1954         attr->max_dest_rd_atomic  = cmd->base.max_dest_rd_atomic;
1955         attr->min_rnr_timer       = cmd->base.min_rnr_timer;
1956         attr->port_num            = cmd->base.port_num;
1957         attr->timeout             = cmd->base.timeout;
1958         attr->retry_cnt           = cmd->base.retry_cnt;
1959         attr->rnr_retry           = cmd->base.rnr_retry;
1960         attr->alt_port_num        = cmd->base.alt_port_num;
1961         attr->alt_timeout         = cmd->base.alt_timeout;
1962         attr->rate_limit          = cmd->rate_limit;
1963
1964         attr->ah_attr.type = rdma_ah_find_type(qp->device,
1965                                                cmd->base.dest.port_num);
1966         if (cmd->base.dest.is_global) {
1967                 rdma_ah_set_grh(&attr->ah_attr, NULL,
1968                                 cmd->base.dest.flow_label,
1969                                 cmd->base.dest.sgid_index,
1970                                 cmd->base.dest.hop_limit,
1971                                 cmd->base.dest.traffic_class);
1972                 rdma_ah_set_dgid_raw(&attr->ah_attr, cmd->base.dest.dgid);
1973         } else {
1974                 rdma_ah_set_ah_flags(&attr->ah_attr, 0);
1975         }
1976         rdma_ah_set_dlid(&attr->ah_attr, cmd->base.dest.dlid);
1977         rdma_ah_set_sl(&attr->ah_attr, cmd->base.dest.sl);
1978         rdma_ah_set_path_bits(&attr->ah_attr, cmd->base.dest.src_path_bits);
1979         rdma_ah_set_static_rate(&attr->ah_attr, cmd->base.dest.static_rate);
1980         rdma_ah_set_port_num(&attr->ah_attr,
1981                              cmd->base.dest.port_num);
1982
1983         attr->alt_ah_attr.type = rdma_ah_find_type(qp->device,
1984                                                    cmd->base.dest.port_num);
1985         if (cmd->base.alt_dest.is_global) {
1986                 rdma_ah_set_grh(&attr->alt_ah_attr, NULL,
1987                                 cmd->base.alt_dest.flow_label,
1988                                 cmd->base.alt_dest.sgid_index,
1989                                 cmd->base.alt_dest.hop_limit,
1990                                 cmd->base.alt_dest.traffic_class);
1991                 rdma_ah_set_dgid_raw(&attr->alt_ah_attr,
1992                                      cmd->base.alt_dest.dgid);
1993         } else {
1994                 rdma_ah_set_ah_flags(&attr->alt_ah_attr, 0);
1995         }
1996
1997         rdma_ah_set_dlid(&attr->alt_ah_attr, cmd->base.alt_dest.dlid);
1998         rdma_ah_set_sl(&attr->alt_ah_attr, cmd->base.alt_dest.sl);
1999         rdma_ah_set_path_bits(&attr->alt_ah_attr,
2000                               cmd->base.alt_dest.src_path_bits);
2001         rdma_ah_set_static_rate(&attr->alt_ah_attr,
2002                                 cmd->base.alt_dest.static_rate);
2003         rdma_ah_set_port_num(&attr->alt_ah_attr,
2004                              cmd->base.alt_dest.port_num);
2005
2006         ret = ib_modify_qp_with_udata(qp, attr,
2007                                       modify_qp_mask(qp->qp_type,
2008                                                      cmd->base.attr_mask),
2009                                       udata);
2010
2011 release_qp:
2012         uobj_put_obj_read(qp);
2013 out:
2014         kfree(attr);
2015
2016         return ret;
2017 }
2018
2019 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
2020                             struct ib_device *ib_dev,
2021                             const char __user *buf, int in_len,
2022                             int out_len)
2023 {
2024         struct ib_uverbs_ex_modify_qp cmd = {};
2025         struct ib_udata udata;
2026         int ret;
2027
2028         if (copy_from_user(&cmd.base, buf, sizeof(cmd.base)))
2029                 return -EFAULT;
2030
2031         if (cmd.base.attr_mask &
2032             ~((IB_USER_LEGACY_LAST_QP_ATTR_MASK << 1) - 1))
2033                 return -EOPNOTSUPP;
2034
2035         INIT_UDATA(&udata, buf + sizeof(cmd.base), NULL,
2036                    in_len - sizeof(cmd.base), out_len);
2037
2038         ret = modify_qp(file, &cmd, &udata);
2039         if (ret)
2040                 return ret;
2041
2042         return in_len;
2043 }
2044
2045 int ib_uverbs_ex_modify_qp(struct ib_uverbs_file *file,
2046                            struct ib_device *ib_dev,
2047                            struct ib_udata *ucore,
2048                            struct ib_udata *uhw)
2049 {
2050         struct ib_uverbs_ex_modify_qp cmd = {};
2051         int ret;
2052
2053         /*
2054          * Last bit is reserved for extending the attr_mask by
2055          * using another field.
2056          */
2057         BUILD_BUG_ON(IB_USER_LAST_QP_ATTR_MASK == (1 << 31));
2058
2059         if (ucore->inlen < sizeof(cmd.base))
2060                 return -EINVAL;
2061
2062         ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
2063         if (ret)
2064                 return ret;
2065
2066         if (cmd.base.attr_mask &
2067             ~((IB_USER_LAST_QP_ATTR_MASK << 1) - 1))
2068                 return -EOPNOTSUPP;
2069
2070         if (ucore->inlen > sizeof(cmd)) {
2071                 if (ib_is_udata_cleared(ucore, sizeof(cmd),
2072                                         ucore->inlen - sizeof(cmd)))
2073                         return -EOPNOTSUPP;
2074         }
2075
2076         ret = modify_qp(file, &cmd, uhw);
2077
2078         return ret;
2079 }
2080
2081 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
2082                              struct ib_device *ib_dev,
2083                              const char __user *buf, int in_len,
2084                              int out_len)
2085 {
2086         struct ib_uverbs_destroy_qp      cmd;
2087         struct ib_uverbs_destroy_qp_resp resp;
2088         struct ib_uobject               *uobj;
2089         struct ib_uqp_object            *obj;
2090         int                              ret = -EINVAL;
2091
2092         if (copy_from_user(&cmd, buf, sizeof cmd))
2093                 return -EFAULT;
2094
2095         memset(&resp, 0, sizeof resp);
2096
2097         uobj  = uobj_get_write(uobj_get_type(qp), cmd.qp_handle,
2098                                file->ucontext);
2099         if (IS_ERR(uobj))
2100                 return PTR_ERR(uobj);
2101
2102         obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
2103         /*
2104          * Make sure we don't free the memory in remove_commit as we still
2105          * needs the uobject memory to create the response.
2106          */
2107         uverbs_uobject_get(uobj);
2108
2109         ret = uobj_remove_commit(uobj);
2110         if (ret) {
2111                 uverbs_uobject_put(uobj);
2112                 return ret;
2113         }
2114
2115         resp.events_reported = obj->uevent.events_reported;
2116         uverbs_uobject_put(uobj);
2117
2118         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2119                          &resp, sizeof resp))
2120                 return -EFAULT;
2121
2122         return in_len;
2123 }
2124
2125 static void *alloc_wr(size_t wr_size, __u32 num_sge)
2126 {
2127         if (num_sge >= (U32_MAX - ALIGN(wr_size, sizeof (struct ib_sge))) /
2128                        sizeof (struct ib_sge))
2129                 return NULL;
2130
2131         return kmalloc(ALIGN(wr_size, sizeof (struct ib_sge)) +
2132                          num_sge * sizeof (struct ib_sge), GFP_KERNEL);
2133 }
2134
2135 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
2136                             struct ib_device *ib_dev,
2137                             const char __user *buf, int in_len,
2138                             int out_len)
2139 {
2140         struct ib_uverbs_post_send      cmd;
2141         struct ib_uverbs_post_send_resp resp;
2142         struct ib_uverbs_send_wr       *user_wr;
2143         struct ib_send_wr              *wr = NULL, *last, *next, *bad_wr;
2144         struct ib_qp                   *qp;
2145         int                             i, sg_ind;
2146         int                             is_ud;
2147         ssize_t                         ret = -EINVAL;
2148         size_t                          next_size;
2149
2150         if (copy_from_user(&cmd, buf, sizeof cmd))
2151                 return -EFAULT;
2152
2153         if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
2154             cmd.sge_count * sizeof (struct ib_uverbs_sge))
2155                 return -EINVAL;
2156
2157         if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
2158                 return -EINVAL;
2159
2160         user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
2161         if (!user_wr)
2162                 return -ENOMEM;
2163
2164         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
2165         if (!qp)
2166                 goto out;
2167
2168         is_ud = qp->qp_type == IB_QPT_UD;
2169         sg_ind = 0;
2170         last = NULL;
2171         for (i = 0; i < cmd.wr_count; ++i) {
2172                 if (copy_from_user(user_wr,
2173                                    buf + sizeof cmd + i * cmd.wqe_size,
2174                                    cmd.wqe_size)) {
2175                         ret = -EFAULT;
2176                         goto out_put;
2177                 }
2178
2179                 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
2180                         ret = -EINVAL;
2181                         goto out_put;
2182                 }
2183
2184                 if (is_ud) {
2185                         struct ib_ud_wr *ud;
2186
2187                         if (user_wr->opcode != IB_WR_SEND &&
2188                             user_wr->opcode != IB_WR_SEND_WITH_IMM) {
2189                                 ret = -EINVAL;
2190                                 goto out_put;
2191                         }
2192
2193                         next_size = sizeof(*ud);
2194                         ud = alloc_wr(next_size, user_wr->num_sge);
2195                         if (!ud) {
2196                                 ret = -ENOMEM;
2197                                 goto out_put;
2198                         }
2199
2200                         ud->ah = uobj_get_obj_read(ah, user_wr->wr.ud.ah,
2201                                                    file->ucontext);
2202                         if (!ud->ah) {
2203                                 kfree(ud);
2204                                 ret = -EINVAL;
2205                                 goto out_put;
2206                         }
2207                         ud->remote_qpn = user_wr->wr.ud.remote_qpn;
2208                         ud->remote_qkey = user_wr->wr.ud.remote_qkey;
2209
2210                         next = &ud->wr;
2211                 } else if (user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM ||
2212                            user_wr->opcode == IB_WR_RDMA_WRITE ||
2213                            user_wr->opcode == IB_WR_RDMA_READ) {
2214                         struct ib_rdma_wr *rdma;
2215
2216                         next_size = sizeof(*rdma);
2217                         rdma = alloc_wr(next_size, user_wr->num_sge);
2218                         if (!rdma) {
2219                                 ret = -ENOMEM;
2220                                 goto out_put;
2221                         }
2222
2223                         rdma->remote_addr = user_wr->wr.rdma.remote_addr;
2224                         rdma->rkey = user_wr->wr.rdma.rkey;
2225
2226                         next = &rdma->wr;
2227                 } else if (user_wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP ||
2228                            user_wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) {
2229                         struct ib_atomic_wr *atomic;
2230
2231                         next_size = sizeof(*atomic);
2232                         atomic = alloc_wr(next_size, user_wr->num_sge);
2233                         if (!atomic) {
2234                                 ret = -ENOMEM;
2235                                 goto out_put;
2236                         }
2237
2238                         atomic->remote_addr = user_wr->wr.atomic.remote_addr;
2239                         atomic->compare_add = user_wr->wr.atomic.compare_add;
2240                         atomic->swap = user_wr->wr.atomic.swap;
2241                         atomic->rkey = user_wr->wr.atomic.rkey;
2242
2243                         next = &atomic->wr;
2244                 } else if (user_wr->opcode == IB_WR_SEND ||
2245                            user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2246                            user_wr->opcode == IB_WR_SEND_WITH_INV) {
2247                         next_size = sizeof(*next);
2248                         next = alloc_wr(next_size, user_wr->num_sge);
2249                         if (!next) {
2250                                 ret = -ENOMEM;
2251                                 goto out_put;
2252                         }
2253                 } else {
2254                         ret = -EINVAL;
2255                         goto out_put;
2256                 }
2257
2258                 if (user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2259                     user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) {
2260                         next->ex.imm_data =
2261                                         (__be32 __force) user_wr->ex.imm_data;
2262                 } else if (user_wr->opcode == IB_WR_SEND_WITH_INV) {
2263                         next->ex.invalidate_rkey = user_wr->ex.invalidate_rkey;
2264                 }
2265
2266                 if (!last)
2267                         wr = next;
2268                 else
2269                         last->next = next;
2270                 last = next;
2271
2272                 next->next       = NULL;
2273                 next->wr_id      = user_wr->wr_id;
2274                 next->num_sge    = user_wr->num_sge;
2275                 next->opcode     = user_wr->opcode;
2276                 next->send_flags = user_wr->send_flags;
2277
2278                 if (next->num_sge) {
2279                         next->sg_list = (void *) next +
2280                                 ALIGN(next_size, sizeof(struct ib_sge));
2281                         if (copy_from_user(next->sg_list,
2282                                            buf + sizeof cmd +
2283                                            cmd.wr_count * cmd.wqe_size +
2284                                            sg_ind * sizeof (struct ib_sge),
2285                                            next->num_sge * sizeof (struct ib_sge))) {
2286                                 ret = -EFAULT;
2287                                 goto out_put;
2288                         }
2289                         sg_ind += next->num_sge;
2290                 } else
2291                         next->sg_list = NULL;
2292         }
2293
2294         resp.bad_wr = 0;
2295         ret = qp->device->post_send(qp->real_qp, wr, &bad_wr);
2296         if (ret)
2297                 for (next = wr; next; next = next->next) {
2298                         ++resp.bad_wr;
2299                         if (next == bad_wr)
2300                                 break;
2301                 }
2302
2303         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2304                          &resp, sizeof resp))
2305                 ret = -EFAULT;
2306
2307 out_put:
2308         uobj_put_obj_read(qp);
2309
2310         while (wr) {
2311                 if (is_ud && ud_wr(wr)->ah)
2312                         uobj_put_obj_read(ud_wr(wr)->ah);
2313                 next = wr->next;
2314                 kfree(wr);
2315                 wr = next;
2316         }
2317
2318 out:
2319         kfree(user_wr);
2320
2321         return ret ? ret : in_len;
2322 }
2323
2324 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
2325                                                     int in_len,
2326                                                     u32 wr_count,
2327                                                     u32 sge_count,
2328                                                     u32 wqe_size)
2329 {
2330         struct ib_uverbs_recv_wr *user_wr;
2331         struct ib_recv_wr        *wr = NULL, *last, *next;
2332         int                       sg_ind;
2333         int                       i;
2334         int                       ret;
2335
2336         if (in_len < wqe_size * wr_count +
2337             sge_count * sizeof (struct ib_uverbs_sge))
2338                 return ERR_PTR(-EINVAL);
2339
2340         if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
2341                 return ERR_PTR(-EINVAL);
2342
2343         user_wr = kmalloc(wqe_size, GFP_KERNEL);
2344         if (!user_wr)
2345                 return ERR_PTR(-ENOMEM);
2346
2347         sg_ind = 0;
2348         last = NULL;
2349         for (i = 0; i < wr_count; ++i) {
2350                 if (copy_from_user(user_wr, buf + i * wqe_size,
2351                                    wqe_size)) {
2352                         ret = -EFAULT;
2353                         goto err;
2354                 }
2355
2356                 if (user_wr->num_sge + sg_ind > sge_count) {
2357                         ret = -EINVAL;
2358                         goto err;
2359                 }
2360
2361                 if (user_wr->num_sge >=
2362                     (U32_MAX - ALIGN(sizeof *next, sizeof (struct ib_sge))) /
2363                     sizeof (struct ib_sge)) {
2364                         ret = -EINVAL;
2365                         goto err;
2366                 }
2367
2368                 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2369                                user_wr->num_sge * sizeof (struct ib_sge),
2370                                GFP_KERNEL);
2371                 if (!next) {
2372                         ret = -ENOMEM;
2373                         goto err;
2374                 }
2375
2376                 if (!last)
2377                         wr = next;
2378                 else
2379                         last->next = next;
2380                 last = next;
2381
2382                 next->next       = NULL;
2383                 next->wr_id      = user_wr->wr_id;
2384                 next->num_sge    = user_wr->num_sge;
2385
2386                 if (next->num_sge) {
2387                         next->sg_list = (void *) next +
2388                                 ALIGN(sizeof *next, sizeof (struct ib_sge));
2389                         if (copy_from_user(next->sg_list,
2390                                            buf + wr_count * wqe_size +
2391                                            sg_ind * sizeof (struct ib_sge),
2392                                            next->num_sge * sizeof (struct ib_sge))) {
2393                                 ret = -EFAULT;
2394                                 goto err;
2395                         }
2396                         sg_ind += next->num_sge;
2397                 } else
2398                         next->sg_list = NULL;
2399         }
2400
2401         kfree(user_wr);
2402         return wr;
2403
2404 err:
2405         kfree(user_wr);
2406
2407         while (wr) {
2408                 next = wr->next;
2409                 kfree(wr);
2410                 wr = next;
2411         }
2412
2413         return ERR_PTR(ret);
2414 }
2415
2416 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
2417                             struct ib_device *ib_dev,
2418                             const char __user *buf, int in_len,
2419                             int out_len)
2420 {
2421         struct ib_uverbs_post_recv      cmd;
2422         struct ib_uverbs_post_recv_resp resp;
2423         struct ib_recv_wr              *wr, *next, *bad_wr;
2424         struct ib_qp                   *qp;
2425         ssize_t                         ret = -EINVAL;
2426
2427         if (copy_from_user(&cmd, buf, sizeof cmd))
2428                 return -EFAULT;
2429
2430         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2431                                        in_len - sizeof cmd, cmd.wr_count,
2432                                        cmd.sge_count, cmd.wqe_size);
2433         if (IS_ERR(wr))
2434                 return PTR_ERR(wr);
2435
2436         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
2437         if (!qp)
2438                 goto out;
2439
2440         resp.bad_wr = 0;
2441         ret = qp->device->post_recv(qp->real_qp, wr, &bad_wr);
2442
2443         uobj_put_obj_read(qp);
2444         if (ret) {
2445                 for (next = wr; next; next = next->next) {
2446                         ++resp.bad_wr;
2447                         if (next == bad_wr)
2448                                 break;
2449                 }
2450         }
2451
2452         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2453                          &resp, sizeof resp))
2454                 ret = -EFAULT;
2455
2456 out:
2457         while (wr) {
2458                 next = wr->next;
2459                 kfree(wr);
2460                 wr = next;
2461         }
2462
2463         return ret ? ret : in_len;
2464 }
2465
2466 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
2467                                 struct ib_device *ib_dev,
2468                                 const char __user *buf, int in_len,
2469                                 int out_len)
2470 {
2471         struct ib_uverbs_post_srq_recv      cmd;
2472         struct ib_uverbs_post_srq_recv_resp resp;
2473         struct ib_recv_wr                  *wr, *next, *bad_wr;
2474         struct ib_srq                      *srq;
2475         ssize_t                             ret = -EINVAL;
2476
2477         if (copy_from_user(&cmd, buf, sizeof cmd))
2478                 return -EFAULT;
2479
2480         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2481                                        in_len - sizeof cmd, cmd.wr_count,
2482                                        cmd.sge_count, cmd.wqe_size);
2483         if (IS_ERR(wr))
2484                 return PTR_ERR(wr);
2485
2486         srq = uobj_get_obj_read(srq, cmd.srq_handle, file->ucontext);
2487         if (!srq)
2488                 goto out;
2489
2490         resp.bad_wr = 0;
2491         ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
2492
2493         uobj_put_obj_read(srq);
2494
2495         if (ret)
2496                 for (next = wr; next; next = next->next) {
2497                         ++resp.bad_wr;
2498                         if (next == bad_wr)
2499                                 break;
2500                 }
2501
2502         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2503                          &resp, sizeof resp))
2504                 ret = -EFAULT;
2505
2506 out:
2507         while (wr) {
2508                 next = wr->next;
2509                 kfree(wr);
2510                 wr = next;
2511         }
2512
2513         return ret ? ret : in_len;
2514 }
2515
2516 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
2517                             struct ib_device *ib_dev,
2518                             const char __user *buf, int in_len,
2519                             int out_len)
2520 {
2521         struct ib_uverbs_create_ah       cmd;
2522         struct ib_uverbs_create_ah_resp  resp;
2523         struct ib_uobject               *uobj;
2524         struct ib_pd                    *pd;
2525         struct ib_ah                    *ah;
2526         struct rdma_ah_attr             attr;
2527         int ret;
2528         struct ib_udata                   udata;
2529         u8                              *dmac;
2530
2531         if (out_len < sizeof resp)
2532                 return -ENOSPC;
2533
2534         if (copy_from_user(&cmd, buf, sizeof cmd))
2535                 return -EFAULT;
2536
2537         if (!rdma_is_port_valid(ib_dev, cmd.attr.port_num))
2538                 return -EINVAL;
2539
2540         INIT_UDATA(&udata, buf + sizeof(cmd),
2541                    (unsigned long)cmd.response + sizeof(resp),
2542                    in_len - sizeof(cmd), out_len - sizeof(resp));
2543
2544         uobj  = uobj_alloc(uobj_get_type(ah), file->ucontext);
2545         if (IS_ERR(uobj))
2546                 return PTR_ERR(uobj);
2547
2548         pd = uobj_get_obj_read(pd, cmd.pd_handle, file->ucontext);
2549         if (!pd) {
2550                 ret = -EINVAL;
2551                 goto err;
2552         }
2553
2554         attr.type = rdma_ah_find_type(ib_dev, cmd.attr.port_num);
2555         rdma_ah_set_dlid(&attr, cmd.attr.dlid);
2556         rdma_ah_set_sl(&attr, cmd.attr.sl);
2557         rdma_ah_set_path_bits(&attr, cmd.attr.src_path_bits);
2558         rdma_ah_set_static_rate(&attr, cmd.attr.static_rate);
2559         rdma_ah_set_port_num(&attr, cmd.attr.port_num);
2560
2561         if (cmd.attr.is_global) {
2562                 rdma_ah_set_grh(&attr, NULL, cmd.attr.grh.flow_label,
2563                                 cmd.attr.grh.sgid_index,
2564                                 cmd.attr.grh.hop_limit,
2565                                 cmd.attr.grh.traffic_class);
2566                 rdma_ah_set_dgid_raw(&attr, cmd.attr.grh.dgid);
2567         } else {
2568                 rdma_ah_set_ah_flags(&attr, 0);
2569         }
2570         dmac = rdma_ah_retrieve_dmac(&attr);
2571         if (dmac)
2572                 memset(dmac, 0, ETH_ALEN);
2573
2574         ah = pd->device->create_ah(pd, &attr, &udata);
2575
2576         if (IS_ERR(ah)) {
2577                 ret = PTR_ERR(ah);
2578                 goto err_put;
2579         }
2580
2581         ah->device  = pd->device;
2582         ah->pd      = pd;
2583         atomic_inc(&pd->usecnt);
2584         ah->uobject  = uobj;
2585         uobj->user_handle = cmd.user_handle;
2586         uobj->object = ah;
2587
2588         resp.ah_handle = uobj->id;
2589
2590         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2591                          &resp, sizeof resp)) {
2592                 ret = -EFAULT;
2593                 goto err_copy;
2594         }
2595
2596         uobj_put_obj_read(pd);
2597         uobj_alloc_commit(uobj);
2598
2599         return in_len;
2600
2601 err_copy:
2602         rdma_destroy_ah(ah);
2603
2604 err_put:
2605         uobj_put_obj_read(pd);
2606
2607 err:
2608         uobj_alloc_abort(uobj);
2609         return ret;
2610 }
2611
2612 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
2613                              struct ib_device *ib_dev,
2614                              const char __user *buf, int in_len, int out_len)
2615 {
2616         struct ib_uverbs_destroy_ah cmd;
2617         struct ib_uobject          *uobj;
2618         int                         ret;
2619
2620         if (copy_from_user(&cmd, buf, sizeof cmd))
2621                 return -EFAULT;
2622
2623         uobj  = uobj_get_write(uobj_get_type(ah), cmd.ah_handle,
2624                                file->ucontext);
2625         if (IS_ERR(uobj))
2626                 return PTR_ERR(uobj);
2627
2628         ret = uobj_remove_commit(uobj);
2629         return ret ?: in_len;
2630 }
2631
2632 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
2633                                struct ib_device *ib_dev,
2634                                const char __user *buf, int in_len,
2635                                int out_len)
2636 {
2637         struct ib_uverbs_attach_mcast cmd;
2638         struct ib_qp                 *qp;
2639         struct ib_uqp_object         *obj;
2640         struct ib_uverbs_mcast_entry *mcast;
2641         int                           ret;
2642
2643         if (copy_from_user(&cmd, buf, sizeof cmd))
2644                 return -EFAULT;
2645
2646         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
2647         if (!qp)
2648                 return -EINVAL;
2649
2650         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2651
2652         mutex_lock(&obj->mcast_lock);
2653         list_for_each_entry(mcast, &obj->mcast_list, list)
2654                 if (cmd.mlid == mcast->lid &&
2655                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2656                         ret = 0;
2657                         goto out_put;
2658                 }
2659
2660         mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
2661         if (!mcast) {
2662                 ret = -ENOMEM;
2663                 goto out_put;
2664         }
2665
2666         mcast->lid = cmd.mlid;
2667         memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
2668
2669         ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
2670         if (!ret)
2671                 list_add_tail(&mcast->list, &obj->mcast_list);
2672         else
2673                 kfree(mcast);
2674
2675 out_put:
2676         mutex_unlock(&obj->mcast_lock);
2677         uobj_put_obj_read(qp);
2678
2679         return ret ? ret : in_len;
2680 }
2681
2682 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
2683                                struct ib_device *ib_dev,
2684                                const char __user *buf, int in_len,
2685                                int out_len)
2686 {
2687         struct ib_uverbs_detach_mcast cmd;
2688         struct ib_uqp_object         *obj;
2689         struct ib_qp                 *qp;
2690         struct ib_uverbs_mcast_entry *mcast;
2691         int                           ret = -EINVAL;
2692         bool                          found = false;
2693
2694         if (copy_from_user(&cmd, buf, sizeof cmd))
2695                 return -EFAULT;
2696
2697         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
2698         if (!qp)
2699                 return -EINVAL;
2700
2701         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2702         mutex_lock(&obj->mcast_lock);
2703
2704         list_for_each_entry(mcast, &obj->mcast_list, list)
2705                 if (cmd.mlid == mcast->lid &&
2706                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2707                         list_del(&mcast->list);
2708                         kfree(mcast);
2709                         found = true;
2710                         break;
2711                 }
2712
2713         if (!found) {
2714                 ret = -EINVAL;
2715                 goto out_put;
2716         }
2717
2718         ret = ib_detach_mcast(qp, (union ib_gid *)cmd.gid, cmd.mlid);
2719
2720 out_put:
2721         mutex_unlock(&obj->mcast_lock);
2722         uobj_put_obj_read(qp);
2723         return ret ? ret : in_len;
2724 }
2725
2726 static int kern_spec_to_ib_spec_action(struct ib_uverbs_flow_spec *kern_spec,
2727                                        union ib_flow_spec *ib_spec)
2728 {
2729         ib_spec->type = kern_spec->type;
2730         switch (ib_spec->type) {
2731         case IB_FLOW_SPEC_ACTION_TAG:
2732                 if (kern_spec->flow_tag.size !=
2733                     sizeof(struct ib_uverbs_flow_spec_action_tag))
2734                         return -EINVAL;
2735
2736                 ib_spec->flow_tag.size = sizeof(struct ib_flow_spec_action_tag);
2737                 ib_spec->flow_tag.tag_id = kern_spec->flow_tag.tag_id;
2738                 break;
2739         case IB_FLOW_SPEC_ACTION_DROP:
2740                 if (kern_spec->drop.size !=
2741                     sizeof(struct ib_uverbs_flow_spec_action_drop))
2742                         return -EINVAL;
2743
2744                 ib_spec->drop.size = sizeof(struct ib_flow_spec_action_drop);
2745                 break;
2746         default:
2747                 return -EINVAL;
2748         }
2749         return 0;
2750 }
2751
2752 static size_t kern_spec_filter_sz(struct ib_uverbs_flow_spec_hdr *spec)
2753 {
2754         /* Returns user space filter size, includes padding */
2755         return (spec->size - sizeof(struct ib_uverbs_flow_spec_hdr)) / 2;
2756 }
2757
2758 static ssize_t spec_filter_size(void *kern_spec_filter, u16 kern_filter_size,
2759                                 u16 ib_real_filter_sz)
2760 {
2761         /*
2762          * User space filter structures must be 64 bit aligned, otherwise this
2763          * may pass, but we won't handle additional new attributes.
2764          */
2765
2766         if (kern_filter_size > ib_real_filter_sz) {
2767                 if (memchr_inv(kern_spec_filter +
2768                                ib_real_filter_sz, 0,
2769                                kern_filter_size - ib_real_filter_sz))
2770                         return -EINVAL;
2771                 return ib_real_filter_sz;
2772         }
2773         return kern_filter_size;
2774 }
2775
2776 static int kern_spec_to_ib_spec_filter(struct ib_uverbs_flow_spec *kern_spec,
2777                                        union ib_flow_spec *ib_spec)
2778 {
2779         ssize_t actual_filter_sz;
2780         ssize_t kern_filter_sz;
2781         ssize_t ib_filter_sz;
2782         void *kern_spec_mask;
2783         void *kern_spec_val;
2784
2785         if (kern_spec->reserved)
2786                 return -EINVAL;
2787
2788         ib_spec->type = kern_spec->type;
2789
2790         kern_filter_sz = kern_spec_filter_sz(&kern_spec->hdr);
2791         /* User flow spec size must be aligned to 4 bytes */
2792         if (kern_filter_sz != ALIGN(kern_filter_sz, 4))
2793                 return -EINVAL;
2794
2795         kern_spec_val = (void *)kern_spec +
2796                 sizeof(struct ib_uverbs_flow_spec_hdr);
2797         kern_spec_mask = kern_spec_val + kern_filter_sz;
2798         if (ib_spec->type == (IB_FLOW_SPEC_INNER | IB_FLOW_SPEC_VXLAN_TUNNEL))
2799                 return -EINVAL;
2800
2801         switch (ib_spec->type & ~IB_FLOW_SPEC_INNER) {
2802         case IB_FLOW_SPEC_ETH:
2803                 ib_filter_sz = offsetof(struct ib_flow_eth_filter, real_sz);
2804                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2805                                                     kern_filter_sz,
2806                                                     ib_filter_sz);
2807                 if (actual_filter_sz <= 0)
2808                         return -EINVAL;
2809                 ib_spec->size = sizeof(struct ib_flow_spec_eth);
2810                 memcpy(&ib_spec->eth.val, kern_spec_val, actual_filter_sz);
2811                 memcpy(&ib_spec->eth.mask, kern_spec_mask, actual_filter_sz);
2812                 break;
2813         case IB_FLOW_SPEC_IPV4:
2814                 ib_filter_sz = offsetof(struct ib_flow_ipv4_filter, real_sz);
2815                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2816                                                     kern_filter_sz,
2817                                                     ib_filter_sz);
2818                 if (actual_filter_sz <= 0)
2819                         return -EINVAL;
2820                 ib_spec->size = sizeof(struct ib_flow_spec_ipv4);
2821                 memcpy(&ib_spec->ipv4.val, kern_spec_val, actual_filter_sz);
2822                 memcpy(&ib_spec->ipv4.mask, kern_spec_mask, actual_filter_sz);
2823                 break;
2824         case IB_FLOW_SPEC_IPV6:
2825                 ib_filter_sz = offsetof(struct ib_flow_ipv6_filter, real_sz);
2826                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2827                                                     kern_filter_sz,
2828                                                     ib_filter_sz);
2829                 if (actual_filter_sz <= 0)
2830                         return -EINVAL;
2831                 ib_spec->size = sizeof(struct ib_flow_spec_ipv6);
2832                 memcpy(&ib_spec->ipv6.val, kern_spec_val, actual_filter_sz);
2833                 memcpy(&ib_spec->ipv6.mask, kern_spec_mask, actual_filter_sz);
2834
2835                 if ((ntohl(ib_spec->ipv6.mask.flow_label)) >= BIT(20) ||
2836                     (ntohl(ib_spec->ipv6.val.flow_label)) >= BIT(20))
2837                         return -EINVAL;
2838                 break;
2839         case IB_FLOW_SPEC_TCP:
2840         case IB_FLOW_SPEC_UDP:
2841                 ib_filter_sz = offsetof(struct ib_flow_tcp_udp_filter, real_sz);
2842                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2843                                                     kern_filter_sz,
2844                                                     ib_filter_sz);
2845                 if (actual_filter_sz <= 0)
2846                         return -EINVAL;
2847                 ib_spec->size = sizeof(struct ib_flow_spec_tcp_udp);
2848                 memcpy(&ib_spec->tcp_udp.val, kern_spec_val, actual_filter_sz);
2849                 memcpy(&ib_spec->tcp_udp.mask, kern_spec_mask, actual_filter_sz);
2850                 break;
2851         case IB_FLOW_SPEC_VXLAN_TUNNEL:
2852                 ib_filter_sz = offsetof(struct ib_flow_tunnel_filter, real_sz);
2853                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2854                                                     kern_filter_sz,
2855                                                     ib_filter_sz);
2856                 if (actual_filter_sz <= 0)
2857                         return -EINVAL;
2858                 ib_spec->tunnel.size = sizeof(struct ib_flow_spec_tunnel);
2859                 memcpy(&ib_spec->tunnel.val, kern_spec_val, actual_filter_sz);
2860                 memcpy(&ib_spec->tunnel.mask, kern_spec_mask, actual_filter_sz);
2861
2862                 if ((ntohl(ib_spec->tunnel.mask.tunnel_id)) >= BIT(24) ||
2863                     (ntohl(ib_spec->tunnel.val.tunnel_id)) >= BIT(24))
2864                         return -EINVAL;
2865                 break;
2866         default:
2867                 return -EINVAL;
2868         }
2869         return 0;
2870 }
2871
2872 static int kern_spec_to_ib_spec(struct ib_uverbs_flow_spec *kern_spec,
2873                                 union ib_flow_spec *ib_spec)
2874 {
2875         if (kern_spec->reserved)
2876                 return -EINVAL;
2877
2878         if (kern_spec->type >= IB_FLOW_SPEC_ACTION_TAG)
2879                 return kern_spec_to_ib_spec_action(kern_spec, ib_spec);
2880         else
2881                 return kern_spec_to_ib_spec_filter(kern_spec, ib_spec);
2882 }
2883
2884 int ib_uverbs_ex_create_wq(struct ib_uverbs_file *file,
2885                            struct ib_device *ib_dev,
2886                            struct ib_udata *ucore,
2887                            struct ib_udata *uhw)
2888 {
2889         struct ib_uverbs_ex_create_wq     cmd = {};
2890         struct ib_uverbs_ex_create_wq_resp resp = {};
2891         struct ib_uwq_object           *obj;
2892         int err = 0;
2893         struct ib_cq *cq;
2894         struct ib_pd *pd;
2895         struct ib_wq *wq;
2896         struct ib_wq_init_attr wq_init_attr = {};
2897         size_t required_cmd_sz;
2898         size_t required_resp_len;
2899
2900         required_cmd_sz = offsetof(typeof(cmd), max_sge) + sizeof(cmd.max_sge);
2901         required_resp_len = offsetof(typeof(resp), wqn) + sizeof(resp.wqn);
2902
2903         if (ucore->inlen < required_cmd_sz)
2904                 return -EINVAL;
2905
2906         if (ucore->outlen < required_resp_len)
2907                 return -ENOSPC;
2908
2909         if (ucore->inlen > sizeof(cmd) &&
2910             !ib_is_udata_cleared(ucore, sizeof(cmd),
2911                                  ucore->inlen - sizeof(cmd)))
2912                 return -EOPNOTSUPP;
2913
2914         err = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
2915         if (err)
2916                 return err;
2917
2918         if (cmd.comp_mask)
2919                 return -EOPNOTSUPP;
2920
2921         obj  = (struct ib_uwq_object *)uobj_alloc(uobj_get_type(wq),
2922                                                   file->ucontext);
2923         if (IS_ERR(obj))
2924                 return PTR_ERR(obj);
2925
2926         pd  = uobj_get_obj_read(pd, cmd.pd_handle, file->ucontext);
2927         if (!pd) {
2928                 err = -EINVAL;
2929                 goto err_uobj;
2930         }
2931
2932         cq = uobj_get_obj_read(cq, cmd.cq_handle, file->ucontext);
2933         if (!cq) {
2934                 err = -EINVAL;
2935                 goto err_put_pd;
2936         }
2937
2938         wq_init_attr.cq = cq;
2939         wq_init_attr.max_sge = cmd.max_sge;
2940         wq_init_attr.max_wr = cmd.max_wr;
2941         wq_init_attr.wq_context = file;
2942         wq_init_attr.wq_type = cmd.wq_type;
2943         wq_init_attr.event_handler = ib_uverbs_wq_event_handler;
2944         if (ucore->inlen >= (offsetof(typeof(cmd), create_flags) +
2945                              sizeof(cmd.create_flags)))
2946                 wq_init_attr.create_flags = cmd.create_flags;
2947         obj->uevent.events_reported = 0;
2948         INIT_LIST_HEAD(&obj->uevent.event_list);
2949         wq = pd->device->create_wq(pd, &wq_init_attr, uhw);
2950         if (IS_ERR(wq)) {
2951                 err = PTR_ERR(wq);
2952                 goto err_put_cq;
2953         }
2954
2955         wq->uobject = &obj->uevent.uobject;
2956         obj->uevent.uobject.object = wq;
2957         wq->wq_type = wq_init_attr.wq_type;
2958         wq->cq = cq;
2959         wq->pd = pd;
2960         wq->device = pd->device;
2961         wq->wq_context = wq_init_attr.wq_context;
2962         atomic_set(&wq->usecnt, 0);
2963         atomic_inc(&pd->usecnt);
2964         atomic_inc(&cq->usecnt);
2965         wq->uobject = &obj->uevent.uobject;
2966         obj->uevent.uobject.object = wq;
2967
2968         memset(&resp, 0, sizeof(resp));
2969         resp.wq_handle = obj->uevent.uobject.id;
2970         resp.max_sge = wq_init_attr.max_sge;
2971         resp.max_wr = wq_init_attr.max_wr;
2972         resp.wqn = wq->wq_num;
2973         resp.response_length = required_resp_len;
2974         err = ib_copy_to_udata(ucore,
2975                                &resp, resp.response_length);
2976         if (err)
2977                 goto err_copy;
2978
2979         uobj_put_obj_read(pd);
2980         uobj_put_obj_read(cq);
2981         uobj_alloc_commit(&obj->uevent.uobject);
2982         return 0;
2983
2984 err_copy:
2985         ib_destroy_wq(wq);
2986 err_put_cq:
2987         uobj_put_obj_read(cq);
2988 err_put_pd:
2989         uobj_put_obj_read(pd);
2990 err_uobj:
2991         uobj_alloc_abort(&obj->uevent.uobject);
2992
2993         return err;
2994 }
2995
2996 int ib_uverbs_ex_destroy_wq(struct ib_uverbs_file *file,
2997                             struct ib_device *ib_dev,
2998                             struct ib_udata *ucore,
2999                             struct ib_udata *uhw)
3000 {
3001         struct ib_uverbs_ex_destroy_wq  cmd = {};
3002         struct ib_uverbs_ex_destroy_wq_resp     resp = {};
3003         struct ib_uobject               *uobj;
3004         struct ib_uwq_object            *obj;
3005         size_t required_cmd_sz;
3006         size_t required_resp_len;
3007         int                             ret;
3008
3009         required_cmd_sz = offsetof(typeof(cmd), wq_handle) + sizeof(cmd.wq_handle);
3010         required_resp_len = offsetof(typeof(resp), reserved) + sizeof(resp.reserved);
3011
3012         if (ucore->inlen < required_cmd_sz)
3013                 return -EINVAL;
3014
3015         if (ucore->outlen < required_resp_len)
3016                 return -ENOSPC;
3017
3018         if (ucore->inlen > sizeof(cmd) &&
3019             !ib_is_udata_cleared(ucore, sizeof(cmd),
3020                                  ucore->inlen - sizeof(cmd)))
3021                 return -EOPNOTSUPP;
3022
3023         ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
3024         if (ret)
3025                 return ret;
3026
3027         if (cmd.comp_mask)
3028                 return -EOPNOTSUPP;
3029
3030         resp.response_length = required_resp_len;
3031         uobj  = uobj_get_write(uobj_get_type(wq), cmd.wq_handle,
3032                                file->ucontext);
3033         if (IS_ERR(uobj))
3034                 return PTR_ERR(uobj);
3035
3036         obj = container_of(uobj, struct ib_uwq_object, uevent.uobject);
3037         /*
3038          * Make sure we don't free the memory in remove_commit as we still
3039          * needs the uobject memory to create the response.
3040          */
3041         uverbs_uobject_get(uobj);
3042
3043         ret = uobj_remove_commit(uobj);
3044         resp.events_reported = obj->uevent.events_reported;
3045         uverbs_uobject_put(uobj);
3046         if (ret)
3047                 return ret;
3048
3049         return ib_copy_to_udata(ucore, &resp, resp.response_length);
3050 }
3051
3052 int ib_uverbs_ex_modify_wq(struct ib_uverbs_file *file,
3053                            struct ib_device *ib_dev,
3054                            struct ib_udata *ucore,
3055                            struct ib_udata *uhw)
3056 {
3057         struct ib_uverbs_ex_modify_wq cmd = {};
3058         struct ib_wq *wq;
3059         struct ib_wq_attr wq_attr = {};
3060         size_t required_cmd_sz;
3061         int ret;
3062
3063         required_cmd_sz = offsetof(typeof(cmd), curr_wq_state) + sizeof(cmd.curr_wq_state);
3064         if (ucore->inlen < required_cmd_sz)
3065                 return -EINVAL;
3066
3067         if (ucore->inlen > sizeof(cmd) &&
3068             !ib_is_udata_cleared(ucore, sizeof(cmd),
3069                                  ucore->inlen - sizeof(cmd)))
3070                 return -EOPNOTSUPP;
3071
3072         ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
3073         if (ret)
3074                 return ret;
3075
3076         if (!cmd.attr_mask)
3077                 return -EINVAL;
3078
3079         if (cmd.attr_mask > (IB_WQ_STATE | IB_WQ_CUR_STATE | IB_WQ_FLAGS))
3080                 return -EINVAL;
3081
3082         wq = uobj_get_obj_read(wq, cmd.wq_handle, file->ucontext);
3083         if (!wq)
3084                 return -EINVAL;
3085
3086         wq_attr.curr_wq_state = cmd.curr_wq_state;
3087         wq_attr.wq_state = cmd.wq_state;
3088         if (cmd.attr_mask & IB_WQ_FLAGS) {
3089                 wq_attr.flags = cmd.flags;
3090                 wq_attr.flags_mask = cmd.flags_mask;
3091         }
3092         ret = wq->device->modify_wq(wq, &wq_attr, cmd.attr_mask, uhw);
3093         uobj_put_obj_read(wq);
3094         return ret;
3095 }
3096
3097 int ib_uverbs_ex_create_rwq_ind_table(struct ib_uverbs_file *file,
3098                                       struct ib_device *ib_dev,
3099                                       struct ib_udata *ucore,
3100                                       struct ib_udata *uhw)
3101 {
3102         struct ib_uverbs_ex_create_rwq_ind_table          cmd = {};
3103         struct ib_uverbs_ex_create_rwq_ind_table_resp  resp = {};
3104         struct ib_uobject                 *uobj;
3105         int err = 0;
3106         struct ib_rwq_ind_table_init_attr init_attr = {};
3107         struct ib_rwq_ind_table *rwq_ind_tbl;
3108         struct ib_wq    **wqs = NULL;
3109         u32 *wqs_handles = NULL;
3110         struct ib_wq    *wq = NULL;
3111         int i, j, num_read_wqs;
3112         u32 num_wq_handles;
3113         u32 expected_in_size;
3114         size_t required_cmd_sz_header;
3115         size_t required_resp_len;
3116
3117         required_cmd_sz_header = offsetof(typeof(cmd), log_ind_tbl_size) + sizeof(cmd.log_ind_tbl_size);
3118         required_resp_len = offsetof(typeof(resp), ind_tbl_num) + sizeof(resp.ind_tbl_num);
3119
3120         if (ucore->inlen < required_cmd_sz_header)
3121                 return -EINVAL;
3122
3123         if (ucore->outlen < required_resp_len)
3124                 return -ENOSPC;
3125
3126         err = ib_copy_from_udata(&cmd, ucore, required_cmd_sz_header);
3127         if (err)
3128                 return err;
3129
3130         ucore->inbuf += required_cmd_sz_header;
3131         ucore->inlen -= required_cmd_sz_header;
3132
3133         if (cmd.comp_mask)
3134                 return -EOPNOTSUPP;
3135
3136         if (cmd.log_ind_tbl_size > IB_USER_VERBS_MAX_LOG_IND_TBL_SIZE)
3137                 return -EINVAL;
3138
3139         num_wq_handles = 1 << cmd.log_ind_tbl_size;
3140         expected_in_size = num_wq_handles * sizeof(__u32);
3141         if (num_wq_handles == 1)
3142                 /* input size for wq handles is u64 aligned */
3143                 expected_in_size += sizeof(__u32);
3144
3145         if (ucore->inlen < expected_in_size)
3146                 return -EINVAL;
3147
3148         if (ucore->inlen > expected_in_size &&
3149             !ib_is_udata_cleared(ucore, expected_in_size,
3150                                  ucore->inlen - expected_in_size))
3151                 return -EOPNOTSUPP;
3152
3153         wqs_handles = kcalloc(num_wq_handles, sizeof(*wqs_handles),
3154                               GFP_KERNEL);
3155         if (!wqs_handles)
3156                 return -ENOMEM;
3157
3158         err = ib_copy_from_udata(wqs_handles, ucore,
3159                                  num_wq_handles * sizeof(__u32));
3160         if (err)
3161                 goto err_free;
3162
3163         wqs = kcalloc(num_wq_handles, sizeof(*wqs), GFP_KERNEL);
3164         if (!wqs) {
3165                 err = -ENOMEM;
3166                 goto  err_free;
3167         }
3168
3169         for (num_read_wqs = 0; num_read_wqs < num_wq_handles;
3170                         num_read_wqs++) {
3171                 wq = uobj_get_obj_read(wq, wqs_handles[num_read_wqs],
3172                                        file->ucontext);
3173                 if (!wq) {
3174                         err = -EINVAL;
3175                         goto put_wqs;
3176                 }
3177
3178                 wqs[num_read_wqs] = wq;
3179         }
3180
3181         uobj  = uobj_alloc(uobj_get_type(rwq_ind_table), file->ucontext);
3182         if (IS_ERR(uobj)) {
3183                 err = PTR_ERR(uobj);
3184                 goto put_wqs;
3185         }
3186
3187         init_attr.log_ind_tbl_size = cmd.log_ind_tbl_size;
3188         init_attr.ind_tbl = wqs;
3189         rwq_ind_tbl = ib_dev->create_rwq_ind_table(ib_dev, &init_attr, uhw);
3190
3191         if (IS_ERR(rwq_ind_tbl)) {
3192                 err = PTR_ERR(rwq_ind_tbl);
3193                 goto err_uobj;
3194         }
3195
3196         rwq_ind_tbl->ind_tbl = wqs;
3197         rwq_ind_tbl->log_ind_tbl_size = init_attr.log_ind_tbl_size;
3198         rwq_ind_tbl->uobject = uobj;
3199         uobj->object = rwq_ind_tbl;
3200         rwq_ind_tbl->device = ib_dev;
3201         atomic_set(&rwq_ind_tbl->usecnt, 0);
3202
3203         for (i = 0; i < num_wq_handles; i++)
3204                 atomic_inc(&wqs[i]->usecnt);
3205
3206         resp.ind_tbl_handle = uobj->id;
3207         resp.ind_tbl_num = rwq_ind_tbl->ind_tbl_num;
3208         resp.response_length = required_resp_len;
3209
3210         err = ib_copy_to_udata(ucore,
3211                                &resp, resp.response_length);
3212         if (err)
3213                 goto err_copy;
3214
3215         kfree(wqs_handles);
3216
3217         for (j = 0; j < num_read_wqs; j++)
3218                 uobj_put_obj_read(wqs[j]);
3219
3220         uobj_alloc_commit(uobj);
3221         return 0;
3222
3223 err_copy:
3224         ib_destroy_rwq_ind_table(rwq_ind_tbl);
3225 err_uobj:
3226         uobj_alloc_abort(uobj);
3227 put_wqs:
3228         for (j = 0; j < num_read_wqs; j++)
3229                 uobj_put_obj_read(wqs[j]);
3230 err_free:
3231         kfree(wqs_handles);
3232         kfree(wqs);
3233         return err;
3234 }
3235
3236 int ib_uverbs_ex_destroy_rwq_ind_table(struct ib_uverbs_file *file,
3237                                        struct ib_device *ib_dev,
3238                                        struct ib_udata *ucore,
3239                                        struct ib_udata *uhw)
3240 {
3241         struct ib_uverbs_ex_destroy_rwq_ind_table       cmd = {};
3242         struct ib_uobject               *uobj;
3243         int                     ret;
3244         size_t required_cmd_sz;
3245
3246         required_cmd_sz = offsetof(typeof(cmd), ind_tbl_handle) + sizeof(cmd.ind_tbl_handle);
3247
3248         if (ucore->inlen < required_cmd_sz)
3249                 return -EINVAL;
3250
3251         if (ucore->inlen > sizeof(cmd) &&
3252             !ib_is_udata_cleared(ucore, sizeof(cmd),
3253                                  ucore->inlen - sizeof(cmd)))
3254                 return -EOPNOTSUPP;
3255
3256         ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
3257         if (ret)
3258                 return ret;
3259
3260         if (cmd.comp_mask)
3261                 return -EOPNOTSUPP;
3262
3263         uobj  = uobj_get_write(uobj_get_type(rwq_ind_table), cmd.ind_tbl_handle,
3264                                file->ucontext);
3265         if (IS_ERR(uobj))
3266                 return PTR_ERR(uobj);
3267
3268         return uobj_remove_commit(uobj);
3269 }
3270
3271 int ib_uverbs_ex_create_flow(struct ib_uverbs_file *file,
3272                              struct ib_device *ib_dev,
3273                              struct ib_udata *ucore,
3274                              struct ib_udata *uhw)
3275 {
3276         struct ib_uverbs_create_flow      cmd;
3277         struct ib_uverbs_create_flow_resp resp;
3278         struct ib_uobject                 *uobj;
3279         struct ib_flow                    *flow_id;
3280         struct ib_uverbs_flow_attr        *kern_flow_attr;
3281         struct ib_flow_attr               *flow_attr;
3282         struct ib_qp                      *qp;
3283         int err = 0;
3284         void *kern_spec;
3285         void *ib_spec;
3286         int i;
3287
3288         if (ucore->inlen < sizeof(cmd))
3289                 return -EINVAL;
3290
3291         if (ucore->outlen < sizeof(resp))
3292                 return -ENOSPC;
3293
3294         err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3295         if (err)
3296                 return err;
3297
3298         ucore->inbuf += sizeof(cmd);
3299         ucore->inlen -= sizeof(cmd);
3300
3301         if (cmd.comp_mask)
3302                 return -EINVAL;
3303
3304         if (!capable(CAP_NET_RAW))
3305                 return -EPERM;
3306
3307         if (cmd.flow_attr.flags >= IB_FLOW_ATTR_FLAGS_RESERVED)
3308                 return -EINVAL;
3309
3310         if ((cmd.flow_attr.flags & IB_FLOW_ATTR_FLAGS_DONT_TRAP) &&
3311             ((cmd.flow_attr.type == IB_FLOW_ATTR_ALL_DEFAULT) ||
3312              (cmd.flow_attr.type == IB_FLOW_ATTR_MC_DEFAULT)))
3313                 return -EINVAL;
3314
3315         if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS)
3316                 return -EINVAL;
3317
3318         if (cmd.flow_attr.size > ucore->inlen ||
3319             cmd.flow_attr.size >
3320             (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec)))
3321                 return -EINVAL;
3322
3323         if (cmd.flow_attr.reserved[0] ||
3324             cmd.flow_attr.reserved[1])
3325                 return -EINVAL;
3326
3327         if (cmd.flow_attr.num_of_specs) {
3328                 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size,
3329                                          GFP_KERNEL);
3330                 if (!kern_flow_attr)
3331                         return -ENOMEM;
3332
3333                 memcpy(kern_flow_attr, &cmd.flow_attr, sizeof(*kern_flow_attr));
3334                 err = ib_copy_from_udata(kern_flow_attr + 1, ucore,
3335                                          cmd.flow_attr.size);
3336                 if (err)
3337                         goto err_free_attr;
3338         } else {
3339                 kern_flow_attr = &cmd.flow_attr;
3340         }
3341
3342         uobj  = uobj_alloc(uobj_get_type(flow), file->ucontext);
3343         if (IS_ERR(uobj)) {
3344                 err = PTR_ERR(uobj);
3345                 goto err_free_attr;
3346         }
3347
3348         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
3349         if (!qp) {
3350                 err = -EINVAL;
3351                 goto err_uobj;
3352         }
3353
3354         flow_attr = kzalloc(sizeof(*flow_attr) + cmd.flow_attr.num_of_specs *
3355                             sizeof(union ib_flow_spec), GFP_KERNEL);
3356         if (!flow_attr) {
3357                 err = -ENOMEM;
3358                 goto err_put;
3359         }
3360
3361         flow_attr->type = kern_flow_attr->type;
3362         flow_attr->priority = kern_flow_attr->priority;
3363         flow_attr->num_of_specs = kern_flow_attr->num_of_specs;
3364         flow_attr->port = kern_flow_attr->port;
3365         flow_attr->flags = kern_flow_attr->flags;
3366         flow_attr->size = sizeof(*flow_attr);
3367
3368         kern_spec = kern_flow_attr + 1;
3369         ib_spec = flow_attr + 1;
3370         for (i = 0; i < flow_attr->num_of_specs &&
3371              cmd.flow_attr.size > offsetof(struct ib_uverbs_flow_spec, reserved) &&
3372              cmd.flow_attr.size >=
3373              ((struct ib_uverbs_flow_spec *)kern_spec)->size; i++) {
3374                 err = kern_spec_to_ib_spec(kern_spec, ib_spec);
3375                 if (err)
3376                         goto err_free;
3377                 flow_attr->size +=
3378                         ((union ib_flow_spec *) ib_spec)->size;
3379                 cmd.flow_attr.size -= ((struct ib_uverbs_flow_spec *)kern_spec)->size;
3380                 kern_spec += ((struct ib_uverbs_flow_spec *) kern_spec)->size;
3381                 ib_spec += ((union ib_flow_spec *) ib_spec)->size;
3382         }
3383         if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) {
3384                 pr_warn("create flow failed, flow %d: %d bytes left from uverb cmd\n",
3385                         i, cmd.flow_attr.size);
3386                 err = -EINVAL;
3387                 goto err_free;
3388         }
3389         flow_id = ib_create_flow(qp, flow_attr, IB_FLOW_DOMAIN_USER);
3390         if (IS_ERR(flow_id)) {
3391                 err = PTR_ERR(flow_id);
3392                 goto err_free;
3393         }
3394         flow_id->uobject = uobj;
3395         uobj->object = flow_id;
3396
3397         memset(&resp, 0, sizeof(resp));
3398         resp.flow_handle = uobj->id;
3399
3400         err = ib_copy_to_udata(ucore,
3401                                &resp, sizeof(resp));
3402         if (err)
3403                 goto err_copy;
3404
3405         uobj_put_obj_read(qp);
3406         uobj_alloc_commit(uobj);
3407         kfree(flow_attr);
3408         if (cmd.flow_attr.num_of_specs)
3409                 kfree(kern_flow_attr);
3410         return 0;
3411 err_copy:
3412         ib_destroy_flow(flow_id);
3413 err_free:
3414         kfree(flow_attr);
3415 err_put:
3416         uobj_put_obj_read(qp);
3417 err_uobj:
3418         uobj_alloc_abort(uobj);
3419 err_free_attr:
3420         if (cmd.flow_attr.num_of_specs)
3421                 kfree(kern_flow_attr);
3422         return err;
3423 }
3424
3425 int ib_uverbs_ex_destroy_flow(struct ib_uverbs_file *file,
3426                               struct ib_device *ib_dev,
3427                               struct ib_udata *ucore,
3428                               struct ib_udata *uhw)
3429 {
3430         struct ib_uverbs_destroy_flow   cmd;
3431         struct ib_uobject               *uobj;
3432         int                             ret;
3433
3434         if (ucore->inlen < sizeof(cmd))
3435                 return -EINVAL;
3436
3437         ret = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3438         if (ret)
3439                 return ret;
3440
3441         if (cmd.comp_mask)
3442                 return -EINVAL;
3443
3444         uobj  = uobj_get_write(uobj_get_type(flow), cmd.flow_handle,
3445                                file->ucontext);
3446         if (IS_ERR(uobj))
3447                 return PTR_ERR(uobj);
3448
3449         ret = uobj_remove_commit(uobj);
3450         return ret;
3451 }
3452
3453 static int __uverbs_create_xsrq(struct ib_uverbs_file *file,
3454                                 struct ib_device *ib_dev,
3455                                 struct ib_uverbs_create_xsrq *cmd,
3456                                 struct ib_udata *udata)
3457 {
3458         struct ib_uverbs_create_srq_resp resp;
3459         struct ib_usrq_object           *obj;
3460         struct ib_pd                    *pd;
3461         struct ib_srq                   *srq;
3462         struct ib_uobject               *uninitialized_var(xrcd_uobj);
3463         struct ib_srq_init_attr          attr;
3464         int ret;
3465
3466         obj  = (struct ib_usrq_object *)uobj_alloc(uobj_get_type(srq),
3467                                                    file->ucontext);
3468         if (IS_ERR(obj))
3469                 return PTR_ERR(obj);
3470
3471         if (cmd->srq_type == IB_SRQT_XRC) {
3472                 xrcd_uobj = uobj_get_read(uobj_get_type(xrcd), cmd->xrcd_handle,
3473                                           file->ucontext);
3474                 if (IS_ERR(xrcd_uobj)) {
3475                         ret = -EINVAL;
3476                         goto err;
3477                 }
3478
3479                 attr.ext.xrc.xrcd = (struct ib_xrcd *)xrcd_uobj->object;
3480                 if (!attr.ext.xrc.xrcd) {
3481                         ret = -EINVAL;
3482                         goto err_put_xrcd;
3483                 }
3484
3485                 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
3486                 atomic_inc(&obj->uxrcd->refcnt);
3487
3488                 attr.ext.xrc.cq  = uobj_get_obj_read(cq, cmd->cq_handle,
3489                                                      file->ucontext);
3490                 if (!attr.ext.xrc.cq) {
3491                         ret = -EINVAL;
3492                         goto err_put_xrcd;
3493                 }
3494         }
3495
3496         pd  = uobj_get_obj_read(pd, cmd->pd_handle, file->ucontext);
3497         if (!pd) {
3498                 ret = -EINVAL;
3499                 goto err_put_cq;
3500         }
3501
3502         attr.event_handler  = ib_uverbs_srq_event_handler;
3503         attr.srq_context    = file;
3504         attr.srq_type       = cmd->srq_type;
3505         attr.attr.max_wr    = cmd->max_wr;
3506         attr.attr.max_sge   = cmd->max_sge;
3507         attr.attr.srq_limit = cmd->srq_limit;
3508
3509         obj->uevent.events_reported = 0;
3510         INIT_LIST_HEAD(&obj->uevent.event_list);
3511
3512         srq = pd->device->create_srq(pd, &attr, udata);
3513         if (IS_ERR(srq)) {
3514                 ret = PTR_ERR(srq);
3515                 goto err_put;
3516         }
3517
3518         srq->device        = pd->device;
3519         srq->pd            = pd;
3520         srq->srq_type      = cmd->srq_type;
3521         srq->uobject       = &obj->uevent.uobject;
3522         srq->event_handler = attr.event_handler;
3523         srq->srq_context   = attr.srq_context;
3524
3525         if (cmd->srq_type == IB_SRQT_XRC) {
3526                 srq->ext.xrc.cq   = attr.ext.xrc.cq;
3527                 srq->ext.xrc.xrcd = attr.ext.xrc.xrcd;
3528                 atomic_inc(&attr.ext.xrc.cq->usecnt);
3529                 atomic_inc(&attr.ext.xrc.xrcd->usecnt);
3530         }
3531
3532         atomic_inc(&pd->usecnt);
3533         atomic_set(&srq->usecnt, 0);
3534
3535         obj->uevent.uobject.object = srq;
3536         obj->uevent.uobject.user_handle = cmd->user_handle;
3537
3538         memset(&resp, 0, sizeof resp);
3539         resp.srq_handle = obj->uevent.uobject.id;
3540         resp.max_wr     = attr.attr.max_wr;
3541         resp.max_sge    = attr.attr.max_sge;
3542         if (cmd->srq_type == IB_SRQT_XRC)
3543                 resp.srqn = srq->ext.xrc.srq_num;
3544
3545         if (copy_to_user((void __user *) (unsigned long) cmd->response,
3546                          &resp, sizeof resp)) {
3547                 ret = -EFAULT;
3548                 goto err_copy;
3549         }
3550
3551         if (cmd->srq_type == IB_SRQT_XRC) {
3552                 uobj_put_read(xrcd_uobj);
3553                 uobj_put_obj_read(attr.ext.xrc.cq);
3554         }
3555         uobj_put_obj_read(pd);
3556         uobj_alloc_commit(&obj->uevent.uobject);
3557
3558         return 0;
3559
3560 err_copy:
3561         ib_destroy_srq(srq);
3562
3563 err_put:
3564         uobj_put_obj_read(pd);
3565
3566 err_put_cq:
3567         if (cmd->srq_type == IB_SRQT_XRC)
3568                 uobj_put_obj_read(attr.ext.xrc.cq);
3569
3570 err_put_xrcd:
3571         if (cmd->srq_type == IB_SRQT_XRC) {
3572                 atomic_dec(&obj->uxrcd->refcnt);
3573                 uobj_put_read(xrcd_uobj);
3574         }
3575
3576 err:
3577         uobj_alloc_abort(&obj->uevent.uobject);
3578         return ret;
3579 }
3580
3581 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
3582                              struct ib_device *ib_dev,
3583                              const char __user *buf, int in_len,
3584                              int out_len)
3585 {
3586         struct ib_uverbs_create_srq      cmd;
3587         struct ib_uverbs_create_xsrq     xcmd;
3588         struct ib_uverbs_create_srq_resp resp;
3589         struct ib_udata                  udata;
3590         int ret;
3591
3592         if (out_len < sizeof resp)
3593                 return -ENOSPC;
3594
3595         if (copy_from_user(&cmd, buf, sizeof cmd))
3596                 return -EFAULT;
3597
3598         xcmd.response    = cmd.response;
3599         xcmd.user_handle = cmd.user_handle;
3600         xcmd.srq_type    = IB_SRQT_BASIC;
3601         xcmd.pd_handle   = cmd.pd_handle;
3602         xcmd.max_wr      = cmd.max_wr;
3603         xcmd.max_sge     = cmd.max_sge;
3604         xcmd.srq_limit   = cmd.srq_limit;
3605
3606         INIT_UDATA(&udata, buf + sizeof cmd,
3607                    (unsigned long) cmd.response + sizeof resp,
3608                    in_len - sizeof cmd - sizeof(struct ib_uverbs_cmd_hdr),
3609                    out_len - sizeof resp);
3610
3611         ret = __uverbs_create_xsrq(file, ib_dev, &xcmd, &udata);
3612         if (ret)
3613                 return ret;
3614
3615         return in_len;
3616 }
3617
3618 ssize_t ib_uverbs_create_xsrq(struct ib_uverbs_file *file,
3619                               struct ib_device *ib_dev,
3620                               const char __user *buf, int in_len, int out_len)
3621 {
3622         struct ib_uverbs_create_xsrq     cmd;
3623         struct ib_uverbs_create_srq_resp resp;
3624         struct ib_udata                  udata;
3625         int ret;
3626
3627         if (out_len < sizeof resp)
3628                 return -ENOSPC;
3629
3630         if (copy_from_user(&cmd, buf, sizeof cmd))
3631                 return -EFAULT;
3632
3633         INIT_UDATA(&udata, buf + sizeof cmd,
3634                    (unsigned long) cmd.response + sizeof resp,
3635                    in_len - sizeof cmd - sizeof(struct ib_uverbs_cmd_hdr),
3636                    out_len - sizeof resp);
3637
3638         ret = __uverbs_create_xsrq(file, ib_dev, &cmd, &udata);
3639         if (ret)
3640                 return ret;
3641
3642         return in_len;
3643 }
3644
3645 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
3646                              struct ib_device *ib_dev,
3647                              const char __user *buf, int in_len,
3648                              int out_len)
3649 {
3650         struct ib_uverbs_modify_srq cmd;
3651         struct ib_udata             udata;
3652         struct ib_srq              *srq;
3653         struct ib_srq_attr          attr;
3654         int                         ret;
3655
3656         if (copy_from_user(&cmd, buf, sizeof cmd))
3657                 return -EFAULT;
3658
3659         INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
3660                    out_len);
3661
3662         srq = uobj_get_obj_read(srq, cmd.srq_handle, file->ucontext);
3663         if (!srq)
3664                 return -EINVAL;
3665
3666         attr.max_wr    = cmd.max_wr;
3667         attr.srq_limit = cmd.srq_limit;
3668
3669         ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata);
3670
3671         uobj_put_obj_read(srq);
3672
3673         return ret ? ret : in_len;
3674 }
3675
3676 ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
3677                             struct ib_device *ib_dev,
3678                             const char __user *buf,
3679                             int in_len, int out_len)
3680 {
3681         struct ib_uverbs_query_srq      cmd;
3682         struct ib_uverbs_query_srq_resp resp;
3683         struct ib_srq_attr              attr;
3684         struct ib_srq                   *srq;
3685         int                             ret;
3686
3687         if (out_len < sizeof resp)
3688                 return -ENOSPC;
3689
3690         if (copy_from_user(&cmd, buf, sizeof cmd))
3691                 return -EFAULT;
3692
3693         srq = uobj_get_obj_read(srq, cmd.srq_handle, file->ucontext);
3694         if (!srq)
3695                 return -EINVAL;
3696
3697         ret = ib_query_srq(srq, &attr);
3698
3699         uobj_put_obj_read(srq);
3700
3701         if (ret)
3702                 return ret;
3703
3704         memset(&resp, 0, sizeof resp);
3705
3706         resp.max_wr    = attr.max_wr;
3707         resp.max_sge   = attr.max_sge;
3708         resp.srq_limit = attr.srq_limit;
3709
3710         if (copy_to_user((void __user *) (unsigned long) cmd.response,
3711                          &resp, sizeof resp))
3712                 return -EFAULT;
3713
3714         return in_len;
3715 }
3716
3717 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
3718                               struct ib_device *ib_dev,
3719                               const char __user *buf, int in_len,
3720                               int out_len)
3721 {
3722         struct ib_uverbs_destroy_srq      cmd;
3723         struct ib_uverbs_destroy_srq_resp resp;
3724         struct ib_uobject                *uobj;
3725         struct ib_uevent_object          *obj;
3726         int                               ret = -EINVAL;
3727
3728         if (copy_from_user(&cmd, buf, sizeof cmd))
3729                 return -EFAULT;
3730
3731         uobj  = uobj_get_write(uobj_get_type(srq), cmd.srq_handle,
3732                                file->ucontext);
3733         if (IS_ERR(uobj))
3734                 return PTR_ERR(uobj);
3735
3736         obj = container_of(uobj, struct ib_uevent_object, uobject);
3737         /*
3738          * Make sure we don't free the memory in remove_commit as we still
3739          * needs the uobject memory to create the response.
3740          */
3741         uverbs_uobject_get(uobj);
3742
3743         memset(&resp, 0, sizeof(resp));
3744
3745         ret = uobj_remove_commit(uobj);
3746         if (ret) {
3747                 uverbs_uobject_put(uobj);
3748                 return ret;
3749         }
3750         resp.events_reported = obj->events_reported;
3751         uverbs_uobject_put(uobj);
3752         if (copy_to_user((void __user *)(unsigned long)cmd.response,
3753                          &resp, sizeof(resp)))
3754                 return -EFAULT;
3755
3756         return in_len;
3757 }
3758
3759 int ib_uverbs_ex_query_device(struct ib_uverbs_file *file,
3760                               struct ib_device *ib_dev,
3761                               struct ib_udata *ucore,
3762                               struct ib_udata *uhw)
3763 {
3764         struct ib_uverbs_ex_query_device_resp resp = { {0} };
3765         struct ib_uverbs_ex_query_device  cmd;
3766         struct ib_device_attr attr = {0};
3767         int err;
3768
3769         if (ucore->inlen < sizeof(cmd))
3770                 return -EINVAL;
3771
3772         err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3773         if (err)
3774                 return err;
3775
3776         if (cmd.comp_mask)
3777                 return -EINVAL;
3778
3779         if (cmd.reserved)
3780                 return -EINVAL;
3781
3782         resp.response_length = offsetof(typeof(resp), odp_caps);
3783
3784         if (ucore->outlen < resp.response_length)
3785                 return -ENOSPC;
3786
3787         err = ib_dev->query_device(ib_dev, &attr, uhw);
3788         if (err)
3789                 return err;
3790
3791         copy_query_dev_fields(file, ib_dev, &resp.base, &attr);
3792
3793         if (ucore->outlen < resp.response_length + sizeof(resp.odp_caps))
3794                 goto end;
3795
3796 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
3797         resp.odp_caps.general_caps = attr.odp_caps.general_caps;
3798         resp.odp_caps.per_transport_caps.rc_odp_caps =
3799                 attr.odp_caps.per_transport_caps.rc_odp_caps;
3800         resp.odp_caps.per_transport_caps.uc_odp_caps =
3801                 attr.odp_caps.per_transport_caps.uc_odp_caps;
3802         resp.odp_caps.per_transport_caps.ud_odp_caps =
3803                 attr.odp_caps.per_transport_caps.ud_odp_caps;
3804 #endif
3805         resp.response_length += sizeof(resp.odp_caps);
3806
3807         if (ucore->outlen < resp.response_length + sizeof(resp.timestamp_mask))
3808                 goto end;
3809
3810         resp.timestamp_mask = attr.timestamp_mask;
3811         resp.response_length += sizeof(resp.timestamp_mask);
3812
3813         if (ucore->outlen < resp.response_length + sizeof(resp.hca_core_clock))
3814                 goto end;
3815
3816         resp.hca_core_clock = attr.hca_core_clock;
3817         resp.response_length += sizeof(resp.hca_core_clock);
3818
3819         if (ucore->outlen < resp.response_length + sizeof(resp.device_cap_flags_ex))
3820                 goto end;
3821
3822         resp.device_cap_flags_ex = attr.device_cap_flags;
3823         resp.response_length += sizeof(resp.device_cap_flags_ex);
3824
3825         if (ucore->outlen < resp.response_length + sizeof(resp.rss_caps))
3826                 goto end;
3827
3828         resp.rss_caps.supported_qpts = attr.rss_caps.supported_qpts;
3829         resp.rss_caps.max_rwq_indirection_tables =
3830                 attr.rss_caps.max_rwq_indirection_tables;
3831         resp.rss_caps.max_rwq_indirection_table_size =
3832                 attr.rss_caps.max_rwq_indirection_table_size;
3833
3834         resp.response_length += sizeof(resp.rss_caps);
3835
3836         if (ucore->outlen < resp.response_length + sizeof(resp.max_wq_type_rq))
3837                 goto end;
3838
3839         resp.max_wq_type_rq = attr.max_wq_type_rq;
3840         resp.response_length += sizeof(resp.max_wq_type_rq);
3841
3842         if (ucore->outlen < resp.response_length + sizeof(resp.raw_packet_caps))
3843                 goto end;
3844
3845         resp.raw_packet_caps = attr.raw_packet_caps;
3846         resp.response_length += sizeof(resp.raw_packet_caps);
3847 end:
3848         err = ib_copy_to_udata(ucore, &resp, resp.response_length);
3849         return err;
3850 }