drivers/infiniband/core/uverbs_cmd.c

   1 /*
   2  * Copyright (c) 2005 Topspin Communications.  All rights reserved.
   3  * Copyright (c) 2005, 2006, 2007 Cisco Systems.  All rights reserved.
   4  * Copyright (c) 2005 PathScale, Inc.  All rights reserved.
   5  * Copyright (c) 2006 Mellanox Technologies.  All rights reserved.
   6  *
   7  * This software is available to you under a choice of one of two
   8  * licenses.  You may choose to be licensed under the terms of the GNU
   9  * General Public License (GPL) Version 2, available from the file
  10  * COPYING in the main directory of this source tree, or the
  11  * OpenIB.org BSD license below:
  12  *
  13  *     Redistribution and use in source and binary forms, with or
  14  *     without modification, are permitted provided that the following
  15  *     conditions are met:
  16  *
  17  *      - Redistributions of source code must retain the above
  18  *        copyright notice, this list of conditions and the following
  19  *        disclaimer.
  20  *
  21  *      - Redistributions in binary form must reproduce the above
  22  *        copyright notice, this list of conditions and the following
  23  *        disclaimer in the documentation and/or other materials
  24  *        provided with the distribution.
  25  *
  26  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  27  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  28  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  29  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  30  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  31  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  32  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  33  * SOFTWARE.
  34  */
  35
  36 #include <linux/file.h>
  37 #include <linux/fs.h>
  38 #include <linux/slab.h>
  39 #include <linux/sched.h>
  40
  41 #include <linux/uaccess.h>
  42
  43 #include <rdma/uverbs_types.h>
  44 #include <rdma/uverbs_std_types.h>
  45 #include "rdma_core.h"
  46
  47 #include "uverbs.h"
  48 #include "core_priv.h"
  49
  50 static struct ib_uverbs_completion_event_file *
  51 ib_uverbs_lookup_comp_file(int fd, struct ib_ucontext *context)
  52 {
  53         struct ib_uobject *uobj = uobj_get_read(uobj_get_type(comp_channel),
  54                                                 fd, context);
  55         struct ib_uobject_file *uobj_file;
  56
  57         if (IS_ERR(uobj))
  58                 return (void *)uobj;
  59
  60         uverbs_uobject_get(uobj);
  61         uobj_put_read(uobj);
  62
  63         uobj_file = container_of(uobj, struct ib_uobject_file, uobj);
  64         return container_of(uobj_file, struct ib_uverbs_completion_event_file,
  65                             uobj_file);
  66 }
  67
  68 ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
  69                               struct ib_device *ib_dev,
  70                               const char __user *buf,
  71                               int in_len, int out_len)
  72 {
  73         struct ib_uverbs_get_context      cmd;
  74         struct ib_uverbs_get_context_resp resp;
  75         struct ib_udata                   udata;
  76         struct ib_ucontext               *ucontext;
  77         struct file                      *filp;
  78         struct ib_rdmacg_object          cg_obj;
  79         int ret;
  80
  81         if (out_len < sizeof resp)
  82                 return -ENOSPC;
  83
  84         if (copy_from_user(&cmd, buf, sizeof cmd))
  85                 return -EFAULT;
  86
  87         mutex_lock(&file->mutex);
  88
  89         if (file->ucontext) {
  90                 ret = -EINVAL;
  91                 goto err;
  92         }
  93
  94         INIT_UDATA(&udata, buf + sizeof cmd,
  95                    (unsigned long) cmd.response + sizeof resp,
  96                    in_len - sizeof cmd, out_len - sizeof resp);
  97
  98         ret = ib_rdmacg_try_charge(&cg_obj, ib_dev, RDMACG_RESOURCE_HCA_HANDLE);
  99         if (ret)
 100                 goto err;
 101
 102         ucontext = ib_dev->alloc_ucontext(ib_dev, &udata);
 103         if (IS_ERR(ucontext)) {
 104                 ret = PTR_ERR(ucontext);
 105                 goto err_alloc;
 106         }
 107
 108         ucontext->device = ib_dev;
 109         ucontext->cg_obj = cg_obj;
 110         /* ufile is required when some objects are released */
 111         ucontext->ufile = file;
 112         uverbs_initialize_ucontext(ucontext);
 113
 114         rcu_read_lock();
 115         ucontext->tgid = get_task_pid(current->group_leader, PIDTYPE_PID);
 116         rcu_read_unlock();
 117         ucontext->closing = 0;
 118
 119 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
 120         ucontext->umem_tree = RB_ROOT;
 121         init_rwsem(&ucontext->umem_rwsem);
 122         ucontext->odp_mrs_count = 0;
 123         INIT_LIST_HEAD(&ucontext->no_private_counters);
 124
 125         if (!(ib_dev->attrs.device_cap_flags & IB_DEVICE_ON_DEMAND_PAGING))
 126                 ucontext->invalidate_range = NULL;
 127
 128 #endif
 129
 130         resp.num_comp_vectors = file->device->num_comp_vectors;
 131
 132         ret = get_unused_fd_flags(O_CLOEXEC);
 133         if (ret < 0)
 134                 goto err_free;
 135         resp.async_fd = ret;
 136
 137         filp = ib_uverbs_alloc_async_event_file(file, ib_dev);
 138         if (IS_ERR(filp)) {
 139                 ret = PTR_ERR(filp);
 140                 goto err_fd;
 141         }
 142
 143         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 144                          &resp, sizeof resp)) {
 145                 ret = -EFAULT;
 146                 goto err_file;
 147         }
 148
 149         file->ucontext = ucontext;
 150
 151         fd_install(resp.async_fd, filp);
 152
 153         mutex_unlock(&file->mutex);
 154
 155         return in_len;
 156
 157 err_file:
 158         ib_uverbs_free_async_event_file(file);
 159         fput(filp);
 160
 161 err_fd:
 162         put_unused_fd(resp.async_fd);
 163
 164 err_free:
 165         put_pid(ucontext->tgid);
 166         ib_dev->dealloc_ucontext(ucontext);
 167
 168 err_alloc:
 169         ib_rdmacg_uncharge(&cg_obj, ib_dev, RDMACG_RESOURCE_HCA_HANDLE);
 170
 171 err:
 172         mutex_unlock(&file->mutex);
 173         return ret;
 174 }
 175
 176 static void copy_query_dev_fields(struct ib_uverbs_file *file,
 177                                   struct ib_device *ib_dev,
 178                                   struct ib_uverbs_query_device_resp *resp,
 179                                   struct ib_device_attr *attr)
 180 {
 181         resp->fw_ver            = attr->fw_ver;
 182         resp->node_guid         = ib_dev->node_guid;
 183         resp->sys_image_guid    = attr->sys_image_guid;
 184         resp->max_mr_size       = attr->max_mr_size;
 185         resp->page_size_cap     = attr->page_size_cap;
 186         resp->vendor_id         = attr->vendor_id;
 187         resp->vendor_part_id    = attr->vendor_part_id;
 188         resp->hw_ver            = attr->hw_ver;
 189         resp->max_qp            = attr->max_qp;
 190         resp->max_qp_wr         = attr->max_qp_wr;
 191         resp->device_cap_flags  = lower_32_bits(attr->device_cap_flags);
 192         resp->max_sge           = attr->max_sge;
 193         resp->max_sge_rd        = attr->max_sge_rd;
 194         resp->max_cq            = attr->max_cq;
 195         resp->max_cqe           = attr->max_cqe;
 196         resp->max_mr            = attr->max_mr;
 197         resp->max_pd            = attr->max_pd;
 198         resp->max_qp_rd_atom    = attr->max_qp_rd_atom;
 199         resp->max_ee_rd_atom    = attr->max_ee_rd_atom;
 200         resp->max_res_rd_atom   = attr->max_res_rd_atom;
 201         resp->max_qp_init_rd_atom       = attr->max_qp_init_rd_atom;
 202         resp->max_ee_init_rd_atom       = attr->max_ee_init_rd_atom;
 203         resp->atomic_cap                = attr->atomic_cap;
 204         resp->max_ee                    = attr->max_ee;
 205         resp->max_rdd                   = attr->max_rdd;
 206         resp->max_mw                    = attr->max_mw;
 207         resp->max_raw_ipv6_qp           = attr->max_raw_ipv6_qp;
 208         resp->max_raw_ethy_qp           = attr->max_raw_ethy_qp;
 209         resp->max_mcast_grp             = attr->max_mcast_grp;
 210         resp->max_mcast_qp_attach       = attr->max_mcast_qp_attach;
 211         resp->max_total_mcast_qp_attach = attr->max_total_mcast_qp_attach;
 212         resp->max_ah                    = attr->max_ah;
 213         resp->max_fmr                   = attr->max_fmr;
 214         resp->max_map_per_fmr           = attr->max_map_per_fmr;
 215         resp->max_srq                   = attr->max_srq;
 216         resp->max_srq_wr                = attr->max_srq_wr;
 217         resp->max_srq_sge               = attr->max_srq_sge;
 218         resp->max_pkeys                 = attr->max_pkeys;
 219         resp->local_ca_ack_delay        = attr->local_ca_ack_delay;
 220         resp->phys_port_cnt             = ib_dev->phys_port_cnt;
 221 }
 222
 223 ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
 224                                struct ib_device *ib_dev,
 225                                const char __user *buf,
 226                                int in_len, int out_len)
 227 {
 228         struct ib_uverbs_query_device      cmd;
 229         struct ib_uverbs_query_device_resp resp;
 230
 231         if (out_len < sizeof resp)
 232                 return -ENOSPC;
 233
 234         if (copy_from_user(&cmd, buf, sizeof cmd))
 235                 return -EFAULT;
 236
 237         memset(&resp, 0, sizeof resp);
 238         copy_query_dev_fields(file, ib_dev, &resp, &ib_dev->attrs);
 239
 240         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 241                          &resp, sizeof resp))
 242                 return -EFAULT;
 243
 244         return in_len;
 245 }
 246
 247 ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
 248                              struct ib_device *ib_dev,
 249                              const char __user *buf,
 250                              int in_len, int out_len)
 251 {
 252         struct ib_uverbs_query_port      cmd;
 253         struct ib_uverbs_query_port_resp resp;
 254         struct ib_port_attr              attr;
 255         int                              ret;
 256
 257         if (out_len < sizeof resp)
 258                 return -ENOSPC;
 259
 260         if (copy_from_user(&cmd, buf, sizeof cmd))
 261                 return -EFAULT;
 262
 263         ret = ib_query_port(ib_dev, cmd.port_num, &attr);
 264         if (ret)
 265                 return ret;
 266
 267         memset(&resp, 0, sizeof resp);
 268
 269         resp.state           = attr.state;
 270         resp.max_mtu         = attr.max_mtu;
 271         resp.active_mtu      = attr.active_mtu;
 272         resp.gid_tbl_len     = attr.gid_tbl_len;
 273         resp.port_cap_flags  = attr.port_cap_flags;
 274         resp.max_msg_sz      = attr.max_msg_sz;
 275         resp.bad_pkey_cntr   = attr.bad_pkey_cntr;
 276         resp.qkey_viol_cntr  = attr.qkey_viol_cntr;
 277         resp.pkey_tbl_len    = attr.pkey_tbl_len;
 278         resp.lid             = attr.lid;
 279         resp.sm_lid          = attr.sm_lid;
 280         resp.lmc             = attr.lmc;
 281         resp.max_vl_num      = attr.max_vl_num;
 282         resp.sm_sl           = attr.sm_sl;
 283         resp.subnet_timeout  = attr.subnet_timeout;
 284         resp.init_type_reply = attr.init_type_reply;
 285         resp.active_width    = attr.active_width;
 286         resp.active_speed    = attr.active_speed;
 287         resp.phys_state      = attr.phys_state;
 288         resp.link_layer      = rdma_port_get_link_layer(ib_dev,
 289                                                         cmd.port_num);
 290
 291         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 292                          &resp, sizeof resp))
 293                 return -EFAULT;
 294
 295         return in_len;
 296 }
 297
 298 ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
 299                            struct ib_device *ib_dev,
 300                            const char __user *buf,
 301                            int in_len, int out_len)
 302 {
 303         struct ib_uverbs_alloc_pd      cmd;
 304         struct ib_uverbs_alloc_pd_resp resp;
 305         struct ib_udata                udata;
 306         struct ib_uobject             *uobj;
 307         struct ib_pd                  *pd;
 308         int                            ret;
 309
 310         if (out_len < sizeof resp)
 311                 return -ENOSPC;
 312
 313         if (copy_from_user(&cmd, buf, sizeof cmd))
 314                 return -EFAULT;
 315
 316         INIT_UDATA(&udata, buf + sizeof cmd,
 317                    (unsigned long) cmd.response + sizeof resp,
 318                    in_len - sizeof cmd, out_len - sizeof resp);
 319
 320         uobj  = uobj_alloc(uobj_get_type(pd), file->ucontext);
 321         if (IS_ERR(uobj))
 322                 return PTR_ERR(uobj);
 323
 324         pd = ib_dev->alloc_pd(ib_dev, file->ucontext, &udata);
 325         if (IS_ERR(pd)) {
 326                 ret = PTR_ERR(pd);
 327                 goto err;
 328         }
 329
 330         pd->device  = ib_dev;
 331         pd->uobject = uobj;
 332         pd->__internal_mr = NULL;
 333         atomic_set(&pd->usecnt, 0);
 334
 335         uobj->object = pd;
 336         memset(&resp, 0, sizeof resp);
 337         resp.pd_handle = uobj->id;
 338
 339         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 340                          &resp, sizeof resp)) {
 341                 ret = -EFAULT;
 342                 goto err_copy;
 343         }
 344
 345         uobj_alloc_commit(uobj);
 346
 347         return in_len;
 348
 349 err_copy:
 350         ib_dealloc_pd(pd);
 351
 352 err:
 353         uobj_alloc_abort(uobj);
 354         return ret;
 355 }
 356
 357 ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
 358                              struct ib_device *ib_dev,
 359                              const char __user *buf,
 360                              int in_len, int out_len)
 361 {
 362         struct ib_uverbs_dealloc_pd cmd;
 363         struct ib_uobject          *uobj;
 364         int                         ret;
 365
 366         if (copy_from_user(&cmd, buf, sizeof cmd))
 367                 return -EFAULT;
 368
 369         uobj  = uobj_get_write(uobj_get_type(pd), cmd.pd_handle,
 370                                file->ucontext);
 371         if (IS_ERR(uobj))
 372                 return PTR_ERR(uobj);
 373
 374         ret = uobj_remove_commit(uobj);
 375
 376         return ret ?: in_len;
 377 }
 378
 379 struct xrcd_table_entry {
 380         struct rb_node  node;
 381         struct ib_xrcd *xrcd;
 382         struct inode   *inode;
 383 };
 384
 385 static int xrcd_table_insert(struct ib_uverbs_device *dev,
 386                             struct inode *inode,
 387                             struct ib_xrcd *xrcd)
 388 {
 389         struct xrcd_table_entry *entry, *scan;
 390         struct rb_node **p = &dev->xrcd_tree.rb_node;
 391         struct rb_node *parent = NULL;
 392
 393         entry = kmalloc(sizeof *entry, GFP_KERNEL);
 394         if (!entry)
 395                 return -ENOMEM;
 396
 397         entry->xrcd  = xrcd;
 398         entry->inode = inode;
 399
 400         while (*p) {
 401                 parent = *p;
 402                 scan = rb_entry(parent, struct xrcd_table_entry, node);
 403
 404                 if (inode < scan->inode) {
 405                         p = &(*p)->rb_left;
 406                 } else if (inode > scan->inode) {
 407                         p = &(*p)->rb_right;
 408                 } else {
 409                         kfree(entry);
 410                         return -EEXIST;
 411                 }
 412         }
 413
 414         rb_link_node(&entry->node, parent, p);
 415         rb_insert_color(&entry->node, &dev->xrcd_tree);
 416         igrab(inode);
 417         return 0;
 418 }
 419
 420 static struct xrcd_table_entry *xrcd_table_search(struct ib_uverbs_device *dev,
 421                                                   struct inode *inode)
 422 {
 423         struct xrcd_table_entry *entry;
 424         struct rb_node *p = dev->xrcd_tree.rb_node;
 425
 426         while (p) {
 427                 entry = rb_entry(p, struct xrcd_table_entry, node);
 428
 429                 if (inode < entry->inode)
 430                         p = p->rb_left;
 431                 else if (inode > entry->inode)
 432                         p = p->rb_right;
 433                 else
 434                         return entry;
 435         }
 436
 437         return NULL;
 438 }
 439
 440 static struct ib_xrcd *find_xrcd(struct ib_uverbs_device *dev, struct inode *inode)
 441 {
 442         struct xrcd_table_entry *entry;
 443
 444         entry = xrcd_table_search(dev, inode);
 445         if (!entry)
 446                 return NULL;
 447
 448         return entry->xrcd;
 449 }
 450
 451 static void xrcd_table_delete(struct ib_uverbs_device *dev,
 452                               struct inode *inode)
 453 {
 454         struct xrcd_table_entry *entry;
 455
 456         entry = xrcd_table_search(dev, inode);
 457         if (entry) {
 458                 iput(inode);
 459                 rb_erase(&entry->node, &dev->xrcd_tree);
 460                 kfree(entry);
 461         }
 462 }
 463
 464 ssize_t ib_uverbs_open_xrcd(struct ib_uverbs_file *file,
 465                             struct ib_device *ib_dev,
 466                             const char __user *buf, int in_len,
 467                             int out_len)
 468 {
 469         struct ib_uverbs_open_xrcd      cmd;
 470         struct ib_uverbs_open_xrcd_resp resp;
 471         struct ib_udata                 udata;
 472         struct ib_uxrcd_object         *obj;
 473         struct ib_xrcd                 *xrcd = NULL;
 474         struct fd                       f = {NULL, 0};
 475         struct inode                   *inode = NULL;
 476         int                             ret = 0;
 477         int                             new_xrcd = 0;
 478
 479         if (out_len < sizeof resp)
 480                 return -ENOSPC;
 481
 482         if (copy_from_user(&cmd, buf, sizeof cmd))
 483                 return -EFAULT;
 484
 485         INIT_UDATA(&udata, buf + sizeof cmd,
 486                    (unsigned long) cmd.response + sizeof resp,
 487                    in_len - sizeof cmd, out_len - sizeof  resp);
 488
 489         mutex_lock(&file->device->xrcd_tree_mutex);
 490
 491         if (cmd.fd != -1) {
 492                 /* search for file descriptor */
 493                 f = fdget(cmd.fd);
 494                 if (!f.file) {
 495                         ret = -EBADF;
 496                         goto err_tree_mutex_unlock;
 497                 }
 498
 499                 inode = file_inode(f.file);
 500                 xrcd = find_xrcd(file->device, inode);
 501                 if (!xrcd && !(cmd.oflags & O_CREAT)) {
 502                         /* no file descriptor. Need CREATE flag */
 503                         ret = -EAGAIN;
 504                         goto err_tree_mutex_unlock;
 505                 }
 506
 507                 if (xrcd && cmd.oflags & O_EXCL) {
 508                         ret = -EINVAL;
 509                         goto err_tree_mutex_unlock;
 510                 }
 511         }
 512
 513         obj  = (struct ib_uxrcd_object *)uobj_alloc(uobj_get_type(xrcd),
 514                                                     file->ucontext);
 515         if (IS_ERR(obj)) {
 516                 ret = PTR_ERR(obj);
 517                 goto err_tree_mutex_unlock;
 518         }
 519
 520         if (!xrcd) {
 521                 xrcd = ib_dev->alloc_xrcd(ib_dev, file->ucontext, &udata);
 522                 if (IS_ERR(xrcd)) {
 523                         ret = PTR_ERR(xrcd);
 524                         goto err;
 525                 }
 526
 527                 xrcd->inode   = inode;
 528                 xrcd->device  = ib_dev;
 529                 atomic_set(&xrcd->usecnt, 0);
 530                 mutex_init(&xrcd->tgt_qp_mutex);
 531                 INIT_LIST_HEAD(&xrcd->tgt_qp_list);
 532                 new_xrcd = 1;
 533         }
 534
 535         atomic_set(&obj->refcnt, 0);
 536         obj->uobject.object = xrcd;
 537         memset(&resp, 0, sizeof resp);
 538         resp.xrcd_handle = obj->uobject.id;
 539
 540         if (inode) {
 541                 if (new_xrcd) {
 542                         /* create new inode/xrcd table entry */
 543                         ret = xrcd_table_insert(file->device, inode, xrcd);
 544                         if (ret)
 545                                 goto err_dealloc_xrcd;
 546                 }
 547                 atomic_inc(&xrcd->usecnt);
 548         }
 549
 550         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 551                          &resp, sizeof resp)) {
 552                 ret = -EFAULT;
 553                 goto err_copy;
 554         }
 555
 556         if (f.file)
 557                 fdput(f);
 558
 559         uobj_alloc_commit(&obj->uobject);
 560
 561         mutex_unlock(&file->device->xrcd_tree_mutex);
 562         return in_len;
 563
 564 err_copy:
 565         if (inode) {
 566                 if (new_xrcd)
 567                         xrcd_table_delete(file->device, inode);
 568                 atomic_dec(&xrcd->usecnt);
 569         }
 570
 571 err_dealloc_xrcd:
 572         ib_dealloc_xrcd(xrcd);
 573
 574 err:
 575         uobj_alloc_abort(&obj->uobject);
 576
 577 err_tree_mutex_unlock:
 578         if (f.file)
 579                 fdput(f);
 580
 581         mutex_unlock(&file->device->xrcd_tree_mutex);
 582
 583         return ret;
 584 }
 585
 586 ssize_t ib_uverbs_close_xrcd(struct ib_uverbs_file *file,
 587                              struct ib_device *ib_dev,
 588                              const char __user *buf, int in_len,
 589                              int out_len)
 590 {
 591         struct ib_uverbs_close_xrcd cmd;
 592         struct ib_uobject           *uobj;
 593         int                         ret = 0;
 594
 595         if (copy_from_user(&cmd, buf, sizeof cmd))
 596                 return -EFAULT;
 597
 598         uobj  = uobj_get_write(uobj_get_type(xrcd), cmd.xrcd_handle,
 599                                file->ucontext);
 600         if (IS_ERR(uobj)) {
 601                 mutex_unlock(&file->device->xrcd_tree_mutex);
 602                 return PTR_ERR(uobj);
 603         }
 604
 605         ret = uobj_remove_commit(uobj);
 606         return ret ?: in_len;
 607 }
 608
 609 int ib_uverbs_dealloc_xrcd(struct ib_uverbs_device *dev,
 610                            struct ib_xrcd *xrcd,
 611                            enum rdma_remove_reason why)
 612 {
 613         struct inode *inode;
 614         int ret;
 615
 616         inode = xrcd->inode;
 617         if (inode && !atomic_dec_and_test(&xrcd->usecnt))
 618                 return 0;
 619
 620         ret = ib_dealloc_xrcd(xrcd);
 621
 622         if (why == RDMA_REMOVE_DESTROY && ret)
 623                 atomic_inc(&xrcd->usecnt);
 624         else if (inode)
 625                 xrcd_table_delete(dev, inode);
 626
 627         return ret;
 628 }
 629
 630 ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
 631                          struct ib_device *ib_dev,
 632                          const char __user *buf, int in_len,
 633                          int out_len)
 634 {
 635         struct ib_uverbs_reg_mr      cmd;
 636         struct ib_uverbs_reg_mr_resp resp;
 637         struct ib_udata              udata;
 638         struct ib_uobject           *uobj;
 639         struct ib_pd                *pd;
 640         struct ib_mr                *mr;
 641         int                          ret;
 642
 643         if (out_len < sizeof resp)
 644                 return -ENOSPC;
 645
 646         if (copy_from_user(&cmd, buf, sizeof cmd))
 647                 return -EFAULT;
 648
 649         INIT_UDATA(&udata, buf + sizeof cmd,
 650                    (unsigned long) cmd.response + sizeof resp,
 651                    in_len - sizeof cmd, out_len - sizeof resp);
 652
 653         if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
 654                 return -EINVAL;
 655
 656         ret = ib_check_mr_access(cmd.access_flags);
 657         if (ret)
 658                 return ret;
 659
 660         uobj  = uobj_alloc(uobj_get_type(mr), file->ucontext);
 661         if (IS_ERR(uobj))
 662                 return PTR_ERR(uobj);
 663
 664         pd = uobj_get_obj_read(pd, cmd.pd_handle, file->ucontext);
 665         if (!pd) {
 666                 ret = -EINVAL;
 667                 goto err_free;
 668         }
 669
 670         if (cmd.access_flags & IB_ACCESS_ON_DEMAND) {
 671                 if (!(pd->device->attrs.device_cap_flags &
 672                       IB_DEVICE_ON_DEMAND_PAGING)) {
 673                         pr_debug("ODP support not available\n");
 674                         ret = -EINVAL;
 675                         goto err_put;
 676                 }
 677         }
 678
 679         mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
 680                                      cmd.access_flags, &udata);
 681         if (IS_ERR(mr)) {
 682                 ret = PTR_ERR(mr);
 683                 goto err_put;
 684         }
 685
 686         mr->device  = pd->device;
 687         mr->pd      = pd;
 688         mr->uobject = uobj;
 689         atomic_inc(&pd->usecnt);
 690
 691         uobj->object = mr;
 692
 693         memset(&resp, 0, sizeof resp);
 694         resp.lkey      = mr->lkey;
 695         resp.rkey      = mr->rkey;
 696         resp.mr_handle = uobj->id;
 697
 698         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 699                          &resp, sizeof resp)) {
 700                 ret = -EFAULT;
 701                 goto err_copy;
 702         }
 703
 704         uobj_put_obj_read(pd);
 705
 706         uobj_alloc_commit(uobj);
 707
 708         return in_len;
 709
 710 err_copy:
 711         ib_dereg_mr(mr);
 712
 713 err_put:
 714         uobj_put_obj_read(pd);
 715
 716 err_free:
 717         uobj_alloc_abort(uobj);
 718         return ret;
 719 }
 720
 721 ssize_t ib_uverbs_rereg_mr(struct ib_uverbs_file *file,
 722                            struct ib_device *ib_dev,
 723                            const char __user *buf, int in_len,
 724                            int out_len)
 725 {
 726         struct ib_uverbs_rereg_mr      cmd;
 727         struct ib_uverbs_rereg_mr_resp resp;
 728         struct ib_udata              udata;
 729         struct ib_pd                *pd = NULL;
 730         struct ib_mr                *mr;
 731         struct ib_pd                *old_pd;
 732         int                          ret;
 733         struct ib_uobject           *uobj;
 734
 735         if (out_len < sizeof(resp))
 736                 return -ENOSPC;
 737
 738         if (copy_from_user(&cmd, buf, sizeof(cmd)))
 739                 return -EFAULT;
 740
 741         INIT_UDATA(&udata, buf + sizeof(cmd),
 742                    (unsigned long) cmd.response + sizeof(resp),
 743                    in_len - sizeof(cmd), out_len - sizeof(resp));
 744
 745         if (cmd.flags & ~IB_MR_REREG_SUPPORTED || !cmd.flags)
 746                 return -EINVAL;
 747
 748         if ((cmd.flags & IB_MR_REREG_TRANS) &&
 749             (!cmd.start || !cmd.hca_va || 0 >= cmd.length ||
 750              (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)))
 751                         return -EINVAL;
 752
 753         uobj  = uobj_get_write(uobj_get_type(mr), cmd.mr_handle,
 754                                file->ucontext);
 755         if (IS_ERR(uobj))
 756                 return PTR_ERR(uobj);
 757
 758         mr = uobj->object;
 759
 760         if (cmd.flags & IB_MR_REREG_ACCESS) {
 761                 ret = ib_check_mr_access(cmd.access_flags);
 762                 if (ret)
 763                         goto put_uobjs;
 764         }
 765
 766         if (cmd.flags & IB_MR_REREG_PD) {
 767                 pd = uobj_get_obj_read(pd, cmd.pd_handle, file->ucontext);
 768                 if (!pd) {
 769                         ret = -EINVAL;
 770                         goto put_uobjs;
 771                 }
 772         }
 773
 774         old_pd = mr->pd;
 775         ret = mr->device->rereg_user_mr(mr, cmd.flags, cmd.start,
 776                                         cmd.length, cmd.hca_va,
 777                                         cmd.access_flags, pd, &udata);
 778         if (!ret) {
 779                 if (cmd.flags & IB_MR_REREG_PD) {
 780                         atomic_inc(&pd->usecnt);
 781                         mr->pd = pd;
 782                         atomic_dec(&old_pd->usecnt);
 783                 }
 784         } else {
 785                 goto put_uobj_pd;
 786         }
 787
 788         memset(&resp, 0, sizeof(resp));
 789         resp.lkey      = mr->lkey;
 790         resp.rkey      = mr->rkey;
 791
 792         if (copy_to_user((void __user *)(unsigned long)cmd.response,
 793                          &resp, sizeof(resp)))
 794                 ret = -EFAULT;
 795         else
 796                 ret = in_len;
 797
 798 put_uobj_pd:
 799         if (cmd.flags & IB_MR_REREG_PD)
 800                 uobj_put_obj_read(pd);
 801
 802 put_uobjs:
 803         uobj_put_write(uobj);
 804
 805         return ret;
 806 }
 807
 808 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
 809                            struct ib_device *ib_dev,
 810                            const char __user *buf, int in_len,
 811                            int out_len)
 812 {
 813         struct ib_uverbs_dereg_mr cmd;
 814         struct ib_uobject        *uobj;
 815         int                       ret = -EINVAL;
 816
 817         if (copy_from_user(&cmd, buf, sizeof cmd))
 818                 return -EFAULT;
 819
 820         uobj  = uobj_get_write(uobj_get_type(mr), cmd.mr_handle,
 821                                file->ucontext);
 822         if (IS_ERR(uobj))
 823                 return PTR_ERR(uobj);
 824
 825         ret = uobj_remove_commit(uobj);
 826
 827         return ret ?: in_len;
 828 }
 829
 830 ssize_t ib_uverbs_alloc_mw(struct ib_uverbs_file *file,
 831                            struct ib_device *ib_dev,
 832                            const char __user *buf, int in_len,
 833                            int out_len)
 834 {
 835         struct ib_uverbs_alloc_mw      cmd;
 836         struct ib_uverbs_alloc_mw_resp resp;
 837         struct ib_uobject             *uobj;
 838         struct ib_pd                  *pd;
 839         struct ib_mw                  *mw;
 840         struct ib_udata                udata;
 841         int                            ret;
 842
 843         if (out_len < sizeof(resp))
 844                 return -ENOSPC;
 845
 846         if (copy_from_user(&cmd, buf, sizeof(cmd)))
 847                 return -EFAULT;
 848
 849         uobj  = uobj_alloc(uobj_get_type(mw), file->ucontext);
 850         if (IS_ERR(uobj))
 851                 return PTR_ERR(uobj);
 852
 853         pd = uobj_get_obj_read(pd, cmd.pd_handle, file->ucontext);
 854         if (!pd) {
 855                 ret = -EINVAL;
 856                 goto err_free;
 857         }
 858
 859         INIT_UDATA(&udata, buf + sizeof(cmd),
 860                    (unsigned long)cmd.response + sizeof(resp),
 861                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
 862                    out_len - sizeof(resp));
 863
 864         mw = pd->device->alloc_mw(pd, cmd.mw_type, &udata);
 865         if (IS_ERR(mw)) {
 866                 ret = PTR_ERR(mw);
 867                 goto err_put;
 868         }
 869
 870         mw->device  = pd->device;
 871         mw->pd      = pd;
 872         mw->uobject = uobj;
 873         atomic_inc(&pd->usecnt);
 874
 875         uobj->object = mw;
 876
 877         memset(&resp, 0, sizeof(resp));
 878         resp.rkey      = mw->rkey;
 879         resp.mw_handle = uobj->id;
 880
 881         if (copy_to_user((void __user *)(unsigned long)cmd.response,
 882                          &resp, sizeof(resp))) {
 883                 ret = -EFAULT;
 884                 goto err_copy;
 885         }
 886
 887         uobj_put_obj_read(pd);
 888         uobj_alloc_commit(uobj);
 889
 890         return in_len;
 891
 892 err_copy:
 893         uverbs_dealloc_mw(mw);
 894 err_put:
 895         uobj_put_obj_read(pd);
 896 err_free:
 897         uobj_alloc_abort(uobj);
 898         return ret;
 899 }
 900
 901 ssize_t ib_uverbs_dealloc_mw(struct ib_uverbs_file *file,
 902                              struct ib_device *ib_dev,
 903                              const char __user *buf, int in_len,
 904                              int out_len)
 905 {
 906         struct ib_uverbs_dealloc_mw cmd;
 907         struct ib_uobject          *uobj;
 908         int                         ret = -EINVAL;
 909
 910         if (copy_from_user(&cmd, buf, sizeof(cmd)))
 911                 return -EFAULT;
 912
 913         uobj  = uobj_get_write(uobj_get_type(mw), cmd.mw_handle,
 914                                file->ucontext);
 915         if (IS_ERR(uobj))
 916                 return PTR_ERR(uobj);
 917
 918         ret = uobj_remove_commit(uobj);
 919         return ret ?: in_len;
 920 }
 921
 922 ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
 923                                       struct ib_device *ib_dev,
 924                                       const char __user *buf, int in_len,
 925                                       int out_len)
 926 {
 927         struct ib_uverbs_create_comp_channel       cmd;
 928         struct ib_uverbs_create_comp_channel_resp  resp;
 929         struct ib_uobject                         *uobj;
 930         struct ib_uverbs_completion_event_file    *ev_file;
 931
 932         if (out_len < sizeof resp)
 933                 return -ENOSPC;
 934
 935         if (copy_from_user(&cmd, buf, sizeof cmd))
 936                 return -EFAULT;
 937
 938         uobj = uobj_alloc(uobj_get_type(comp_channel), file->ucontext);
 939         if (IS_ERR(uobj))
 940                 return PTR_ERR(uobj);
 941
 942         resp.fd = uobj->id;
 943
 944         ev_file = container_of(uobj, struct ib_uverbs_completion_event_file,
 945                                uobj_file.uobj);
 946         ib_uverbs_init_event_queue(&ev_file->ev_queue);
 947
 948         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 949                          &resp, sizeof resp)) {
 950                 uobj_alloc_abort(uobj);
 951                 return -EFAULT;
 952         }
 953
 954         uobj_alloc_commit(uobj);
 955         return in_len;
 956 }
 957
 958 static struct ib_ucq_object *create_cq(struct ib_uverbs_file *file,
 959                                         struct ib_device *ib_dev,
 960                                        struct ib_udata *ucore,
 961                                        struct ib_udata *uhw,
 962                                        struct ib_uverbs_ex_create_cq *cmd,
 963                                        size_t cmd_sz,
 964                                        int (*cb)(struct ib_uverbs_file *file,
 965                                                  struct ib_ucq_object *obj,
 966                                                  struct ib_uverbs_ex_create_cq_resp *resp,
 967                                                  struct ib_udata *udata,
 968                                                  void *context),
 969                                        void *context)
 970 {
 971         struct ib_ucq_object           *obj;
 972         struct ib_uverbs_completion_event_file    *ev_file = NULL;
 973         struct ib_cq                   *cq;
 974         int                             ret;
 975         struct ib_uverbs_ex_create_cq_resp resp;
 976         struct ib_cq_init_attr attr = {};
 977
 978         if (cmd->comp_vector >= file->device->num_comp_vectors)
 979                 return ERR_PTR(-EINVAL);
 980
 981         obj  = (struct ib_ucq_object *)uobj_alloc(uobj_get_type(cq),
 982                                                   file->ucontext);
 983         if (IS_ERR(obj))
 984                 return obj;
 985
 986         if (cmd->comp_channel >= 0) {
 987                 ev_file = ib_uverbs_lookup_comp_file(cmd->comp_channel,
 988                                                      file->ucontext);
 989                 if (IS_ERR(ev_file)) {
 990                         ret = PTR_ERR(ev_file);
 991                         goto err;
 992                 }
 993         }
 994
 995         obj->uobject.user_handle = cmd->user_handle;
 996         obj->uverbs_file           = file;
 997         obj->comp_events_reported  = 0;
 998         obj->async_events_reported = 0;
 999         INIT_LIST_HEAD(&obj->comp_list);
1000         INIT_LIST_HEAD(&obj->async_list);
1001
1002         attr.cqe = cmd->cqe;
1003         attr.comp_vector = cmd->comp_vector;
1004
1005         if (cmd_sz > offsetof(typeof(*cmd), flags) + sizeof(cmd->flags))
1006                 attr.flags = cmd->flags;
1007
1008         cq = ib_dev->create_cq(ib_dev, &attr, file->ucontext, uhw);
1009         if (IS_ERR(cq)) {
1010                 ret = PTR_ERR(cq);
1011                 goto err_file;
1012         }
1013
1014         cq->device        = ib_dev;
1015         cq->uobject       = &obj->uobject;
1016         cq->comp_handler  = ib_uverbs_comp_handler;
1017         cq->event_handler = ib_uverbs_cq_event_handler;
1018         cq->cq_context    = &ev_file->ev_queue;
1019         atomic_set(&cq->usecnt, 0);
1020
1021         obj->uobject.object = cq;
1022         memset(&resp, 0, sizeof resp);
1023         resp.base.cq_handle = obj->uobject.id;
1024         resp.base.cqe       = cq->cqe;
1025
1026         resp.response_length = offsetof(typeof(resp), response_length) +
1027                 sizeof(resp.response_length);
1028
1029         ret = cb(file, obj, &resp, ucore, context);
1030         if (ret)
1031                 goto err_cb;
1032
1033         uobj_alloc_commit(&obj->uobject);
1034
1035         return obj;
1036
1037 err_cb:
1038         ib_destroy_cq(cq);
1039
1040 err_file:
1041         if (ev_file)
1042                 ib_uverbs_release_ucq(file, ev_file, obj);
1043
1044 err:
1045         uobj_alloc_abort(&obj->uobject);
1046
1047         return ERR_PTR(ret);
1048 }
1049
1050 static int ib_uverbs_create_cq_cb(struct ib_uverbs_file *file,
1051                                   struct ib_ucq_object *obj,
1052                                   struct ib_uverbs_ex_create_cq_resp *resp,
1053                                   struct ib_udata *ucore, void *context)
1054 {
1055         if (ib_copy_to_udata(ucore, &resp->base, sizeof(resp->base)))
1056                 return -EFAULT;
1057
1058         return 0;
1059 }
1060
1061 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
1062                             struct ib_device *ib_dev,
1063                             const char __user *buf, int in_len,
1064                             int out_len)
1065 {
1066         struct ib_uverbs_create_cq      cmd;
1067         struct ib_uverbs_ex_create_cq   cmd_ex;
1068         struct ib_uverbs_create_cq_resp resp;
1069         struct ib_udata                 ucore;
1070         struct ib_udata                 uhw;
1071         struct ib_ucq_object           *obj;
1072
1073         if (out_len < sizeof(resp))
1074                 return -ENOSPC;
1075
1076         if (copy_from_user(&cmd, buf, sizeof(cmd)))
1077                 return -EFAULT;
1078
1079         INIT_UDATA(&ucore, buf, (unsigned long)cmd.response, sizeof(cmd), sizeof(resp));
1080
1081         INIT_UDATA(&uhw, buf + sizeof(cmd),
1082                    (unsigned long)cmd.response + sizeof(resp),
1083                    in_len - sizeof(cmd), out_len - sizeof(resp));
1084
1085         memset(&cmd_ex, 0, sizeof(cmd_ex));
1086         cmd_ex.user_handle = cmd.user_handle;
1087         cmd_ex.cqe = cmd.cqe;
1088         cmd_ex.comp_vector = cmd.comp_vector;
1089         cmd_ex.comp_channel = cmd.comp_channel;
1090
1091         obj = create_cq(file, ib_dev, &ucore, &uhw, &cmd_ex,
1092                         offsetof(typeof(cmd_ex), comp_channel) +
1093                         sizeof(cmd.comp_channel), ib_uverbs_create_cq_cb,
1094                         NULL);
1095
1096         if (IS_ERR(obj))
1097                 return PTR_ERR(obj);
1098
1099         return in_len;
1100 }
1101
1102 static int ib_uverbs_ex_create_cq_cb(struct ib_uverbs_file *file,
1103                                      struct ib_ucq_object *obj,
1104                                      struct ib_uverbs_ex_create_cq_resp *resp,
1105                                      struct ib_udata *ucore, void *context)
1106 {
1107         if (ib_copy_to_udata(ucore, resp, resp->response_length))
1108                 return -EFAULT;
1109
1110         return 0;
1111 }
1112
1113 int ib_uverbs_ex_create_cq(struct ib_uverbs_file *file,
1114                          struct ib_device *ib_dev,
1115                            struct ib_udata *ucore,
1116                            struct ib_udata *uhw)
1117 {
1118         struct ib_uverbs_ex_create_cq_resp resp;
1119         struct ib_uverbs_ex_create_cq  cmd;
1120         struct ib_ucq_object           *obj;
1121         int err;
1122
1123         if (ucore->inlen < sizeof(cmd))
1124                 return -EINVAL;
1125
1126         err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
1127         if (err)
1128                 return err;
1129
1130         if (cmd.comp_mask)
1131                 return -EINVAL;
1132
1133         if (cmd.reserved)
1134                 return -EINVAL;
1135
1136         if (ucore->outlen < (offsetof(typeof(resp), response_length) +
1137                              sizeof(resp.response_length)))
1138                 return -ENOSPC;
1139
1140         obj = create_cq(file, ib_dev, ucore, uhw, &cmd,
1141                         min(ucore->inlen, sizeof(cmd)),
1142                         ib_uverbs_ex_create_cq_cb, NULL);
1143
1144         if (IS_ERR(obj))
1145                 return PTR_ERR(obj);
1146
1147         return 0;
1148 }
1149
1150 ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
1151                             struct ib_device *ib_dev,
1152                             const char __user *buf, int in_len,
1153                             int out_len)
1154 {
1155         struct ib_uverbs_resize_cq      cmd;
1156         struct ib_uverbs_resize_cq_resp resp;
1157         struct ib_udata                 udata;
1158         struct ib_cq                    *cq;
1159         int                             ret = -EINVAL;
1160
1161         if (copy_from_user(&cmd, buf, sizeof cmd))
1162                 return -EFAULT;
1163
1164         INIT_UDATA(&udata, buf + sizeof cmd,
1165                    (unsigned long) cmd.response + sizeof resp,
1166                    in_len - sizeof cmd, out_len - sizeof resp);
1167
1168         cq = uobj_get_obj_read(cq, cmd.cq_handle, file->ucontext);
1169         if (!cq)
1170                 return -EINVAL;
1171
1172         ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
1173         if (ret)
1174                 goto out;
1175
1176         resp.cqe = cq->cqe;
1177
1178         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1179                          &resp, sizeof resp.cqe))
1180                 ret = -EFAULT;
1181
1182 out:
1183         uobj_put_obj_read(cq);
1184
1185         return ret ? ret : in_len;
1186 }
1187
1188 static int copy_wc_to_user(void __user *dest, struct ib_wc *wc)
1189 {
1190         struct ib_uverbs_wc tmp;
1191
1192         tmp.wr_id               = wc->wr_id;
1193         tmp.status              = wc->status;
1194         tmp.opcode              = wc->opcode;
1195         tmp.vendor_err          = wc->vendor_err;
1196         tmp.byte_len            = wc->byte_len;
1197         tmp.ex.imm_data         = (__u32 __force) wc->ex.imm_data;
1198         tmp.qp_num              = wc->qp->qp_num;
1199         tmp.src_qp              = wc->src_qp;
1200         tmp.wc_flags            = wc->wc_flags;
1201         tmp.pkey_index          = wc->pkey_index;
1202         tmp.slid                = wc->slid;
1203         tmp.sl                  = wc->sl;
1204         tmp.dlid_path_bits      = wc->dlid_path_bits;
1205         tmp.port_num            = wc->port_num;
1206         tmp.reserved            = 0;
1207
1208         if (copy_to_user(dest, &tmp, sizeof tmp))
1209                 return -EFAULT;
1210
1211         return 0;
1212 }
1213
1214 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
1215                           struct ib_device *ib_dev,
1216                           const char __user *buf, int in_len,
1217                           int out_len)
1218 {
1219         struct ib_uverbs_poll_cq       cmd;
1220         struct ib_uverbs_poll_cq_resp  resp;
1221         u8 __user                     *header_ptr;
1222         u8 __user                     *data_ptr;
1223         struct ib_cq                  *cq;
1224         struct ib_wc                   wc;
1225         int                            ret;
1226
1227         if (copy_from_user(&cmd, buf, sizeof cmd))
1228                 return -EFAULT;
1229
1230         cq = uobj_get_obj_read(cq, cmd.cq_handle, file->ucontext);
1231         if (!cq)
1232                 return -EINVAL;
1233
1234         /* we copy a struct ib_uverbs_poll_cq_resp to user space */
1235         header_ptr = (void __user *)(unsigned long) cmd.response;
1236         data_ptr = header_ptr + sizeof resp;
1237
1238         memset(&resp, 0, sizeof resp);
1239         while (resp.count < cmd.ne) {
1240                 ret = ib_poll_cq(cq, 1, &wc);
1241                 if (ret < 0)
1242                         goto out_put;
1243                 if (!ret)
1244                         break;
1245
1246                 ret = copy_wc_to_user(data_ptr, &wc);
1247                 if (ret)
1248                         goto out_put;
1249
1250                 data_ptr += sizeof(struct ib_uverbs_wc);
1251                 ++resp.count;
1252         }
1253
1254         if (copy_to_user(header_ptr, &resp, sizeof resp)) {
1255                 ret = -EFAULT;
1256                 goto out_put;
1257         }
1258
1259         ret = in_len;
1260
1261 out_put:
1262         uobj_put_obj_read(cq);
1263         return ret;
1264 }
1265
1266 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
1267                                 struct ib_device *ib_dev,
1268                                 const char __user *buf, int in_len,
1269                                 int out_len)
1270 {
1271         struct ib_uverbs_req_notify_cq cmd;
1272         struct ib_cq                  *cq;
1273
1274         if (copy_from_user(&cmd, buf, sizeof cmd))
1275                 return -EFAULT;
1276
1277         cq = uobj_get_obj_read(cq, cmd.cq_handle, file->ucontext);
1278         if (!cq)
1279                 return -EINVAL;
1280
1281         ib_req_notify_cq(cq, cmd.solicited_only ?
1282                          IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
1283
1284         uobj_put_obj_read(cq);
1285
1286         return in_len;
1287 }
1288
1289 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
1290                              struct ib_device *ib_dev,
1291                              const char __user *buf, int in_len,
1292                              int out_len)
1293 {
1294         struct ib_uverbs_destroy_cq      cmd;
1295         struct ib_uverbs_destroy_cq_resp resp;
1296         struct ib_uobject               *uobj;
1297         struct ib_cq                    *cq;
1298         struct ib_ucq_object            *obj;
1299         struct ib_uverbs_event_queue    *ev_queue;
1300         int                              ret = -EINVAL;
1301
1302         if (copy_from_user(&cmd, buf, sizeof cmd))
1303                 return -EFAULT;
1304
1305         uobj  = uobj_get_write(uobj_get_type(cq), cmd.cq_handle,
1306                                file->ucontext);
1307         if (IS_ERR(uobj))
1308                 return PTR_ERR(uobj);
1309
1310         /*
1311          * Make sure we don't free the memory in remove_commit as we still
1312          * needs the uobject memory to create the response.
1313          */
1314         uverbs_uobject_get(uobj);
1315         cq      = uobj->object;
1316         ev_queue = cq->cq_context;
1317         obj     = container_of(cq->uobject, struct ib_ucq_object, uobject);
1318
1319         memset(&resp, 0, sizeof(resp));
1320
1321         ret = uobj_remove_commit(uobj);
1322         if (ret) {
1323                 uverbs_uobject_put(uobj);
1324                 return ret;
1325         }
1326
1327         resp.comp_events_reported  = obj->comp_events_reported;
1328         resp.async_events_reported = obj->async_events_reported;
1329
1330         uverbs_uobject_put(uobj);
1331         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1332                          &resp, sizeof resp))
1333                 return -EFAULT;
1334
1335         return in_len;
1336 }
1337
1338 static int create_qp(struct ib_uverbs_file *file,
1339                      struct ib_udata *ucore,
1340                      struct ib_udata *uhw,
1341                      struct ib_uverbs_ex_create_qp *cmd,
1342                      size_t cmd_sz,
1343                      int (*cb)(struct ib_uverbs_file *file,
1344                                struct ib_uverbs_ex_create_qp_resp *resp,
1345                                struct ib_udata *udata),
1346                      void *context)
1347 {
1348         struct ib_uqp_object            *obj;
1349         struct ib_device                *device;
1350         struct ib_pd                    *pd = NULL;
1351         struct ib_xrcd                  *xrcd = NULL;
1352         struct ib_uobject               *xrcd_uobj = ERR_PTR(-ENOENT);
1353         struct ib_cq                    *scq = NULL, *rcq = NULL;
1354         struct ib_srq                   *srq = NULL;
1355         struct ib_qp                    *qp;
1356         char                            *buf;
1357         struct ib_qp_init_attr          attr = {};
1358         struct ib_uverbs_ex_create_qp_resp resp;
1359         int                             ret;
1360         struct ib_rwq_ind_table *ind_tbl = NULL;
1361         bool has_sq = true;
1362
1363         if (cmd->qp_type == IB_QPT_RAW_PACKET && !capable(CAP_NET_RAW))
1364                 return -EPERM;
1365
1366         obj  = (struct ib_uqp_object *)uobj_alloc(uobj_get_type(qp),
1367                                                   file->ucontext);
1368         if (IS_ERR(obj))
1369                 return PTR_ERR(obj);
1370         obj->uxrcd = NULL;
1371         obj->uevent.uobject.user_handle = cmd->user_handle;
1372         mutex_init(&obj->mcast_lock);
1373
1374         if (cmd_sz >= offsetof(typeof(*cmd), rwq_ind_tbl_handle) +
1375                       sizeof(cmd->rwq_ind_tbl_handle) &&
1376                       (cmd->comp_mask & IB_UVERBS_CREATE_QP_MASK_IND_TABLE)) {
1377                 ind_tbl = uobj_get_obj_read(rwq_ind_table,
1378                                             cmd->rwq_ind_tbl_handle,
1379                                             file->ucontext);
1380                 if (!ind_tbl) {
1381                         ret = -EINVAL;
1382                         goto err_put;
1383                 }
1384
1385                 attr.rwq_ind_tbl = ind_tbl;
1386         }
1387
1388         if ((cmd_sz >= offsetof(typeof(*cmd), reserved1) +
1389                        sizeof(cmd->reserved1)) && cmd->reserved1) {
1390                 ret = -EOPNOTSUPP;
1391                 goto err_put;
1392         }
1393
1394         if (ind_tbl && (cmd->max_recv_wr || cmd->max_recv_sge || cmd->is_srq)) {
1395                 ret = -EINVAL;
1396                 goto err_put;
1397         }
1398
1399         if (ind_tbl && !cmd->max_send_wr)
1400                 has_sq = false;
1401
1402         if (cmd->qp_type == IB_QPT_XRC_TGT) {
1403                 xrcd_uobj = uobj_get_read(uobj_get_type(xrcd), cmd->pd_handle,
1404                                           file->ucontext);
1405
1406                 if (IS_ERR(xrcd_uobj)) {
1407                         ret = -EINVAL;
1408                         goto err_put;
1409                 }
1410
1411                 xrcd = (struct ib_xrcd *)xrcd_uobj->object;
1412                 if (!xrcd) {
1413                         ret = -EINVAL;
1414                         goto err_put;
1415                 }
1416                 device = xrcd->device;
1417         } else {
1418                 if (cmd->qp_type == IB_QPT_XRC_INI) {
1419                         cmd->max_recv_wr = 0;
1420                         cmd->max_recv_sge = 0;
1421                 } else {
1422                         if (cmd->is_srq) {
1423                                 srq = uobj_get_obj_read(srq, cmd->srq_handle,
1424                                                         file->ucontext);
1425                                 if (!srq || srq->srq_type != IB_SRQT_BASIC) {
1426                                         ret = -EINVAL;
1427                                         goto err_put;
1428                                 }
1429                         }
1430
1431                         if (!ind_tbl) {
1432                                 if (cmd->recv_cq_handle != cmd->send_cq_handle) {
1433                                         rcq = uobj_get_obj_read(cq, cmd->recv_cq_handle,
1434                                                                 file->ucontext);
1435                                         if (!rcq) {
1436                                                 ret = -EINVAL;
1437                                                 goto err_put;
1438                                         }
1439                                 }
1440                         }
1441                 }
1442
1443                 if (has_sq)
1444                         scq = uobj_get_obj_read(cq, cmd->send_cq_handle,
1445                                                 file->ucontext);
1446                 if (!ind_tbl)
1447                         rcq = rcq ?: scq;
1448                 pd  = uobj_get_obj_read(pd, cmd->pd_handle, file->ucontext);
1449                 if (!pd || (!scq && has_sq)) {
1450                         ret = -EINVAL;
1451                         goto err_put;
1452                 }
1453
1454                 device = pd->device;
1455         }
1456
1457         attr.event_handler = ib_uverbs_qp_event_handler;
1458         attr.qp_context    = file;
1459         attr.send_cq       = scq;
1460         attr.recv_cq       = rcq;
1461         attr.srq           = srq;
1462         attr.xrcd          = xrcd;
1463         attr.sq_sig_type   = cmd->sq_sig_all ? IB_SIGNAL_ALL_WR :
1464                                               IB_SIGNAL_REQ_WR;
1465         attr.qp_type       = cmd->qp_type;
1466         attr.create_flags  = 0;
1467
1468         attr.cap.max_send_wr     = cmd->max_send_wr;
1469         attr.cap.max_recv_wr     = cmd->max_recv_wr;
1470         attr.cap.max_send_sge    = cmd->max_send_sge;
1471         attr.cap.max_recv_sge    = cmd->max_recv_sge;
1472         attr.cap.max_inline_data = cmd->max_inline_data;
1473
1474         obj->uevent.events_reported     = 0;
1475         INIT_LIST_HEAD(&obj->uevent.event_list);
1476         INIT_LIST_HEAD(&obj->mcast_list);
1477
1478         if (cmd_sz >= offsetof(typeof(*cmd), create_flags) +
1479                       sizeof(cmd->create_flags))
1480                 attr.create_flags = cmd->create_flags;
1481
1482         if (attr.create_flags & ~(IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK |
1483                                 IB_QP_CREATE_CROSS_CHANNEL |
1484                                 IB_QP_CREATE_MANAGED_SEND |
1485                                 IB_QP_CREATE_MANAGED_RECV |
1486                                 IB_QP_CREATE_SCATTER_FCS |
1487                                 IB_QP_CREATE_CVLAN_STRIPPING)) {
1488                 ret = -EINVAL;
1489                 goto err_put;
1490         }
1491
1492         buf = (void *)cmd + sizeof(*cmd);
1493         if (cmd_sz > sizeof(*cmd))
1494                 if (!(buf[0] == 0 && !memcmp(buf, buf + 1,
1495                                              cmd_sz - sizeof(*cmd) - 1))) {
1496                         ret = -EINVAL;
1497                         goto err_put;
1498                 }
1499
1500         if (cmd->qp_type == IB_QPT_XRC_TGT)
1501                 qp = ib_create_qp(pd, &attr);
1502         else
1503                 qp = device->create_qp(pd, &attr, uhw);
1504
1505         if (IS_ERR(qp)) {
1506                 ret = PTR_ERR(qp);
1507                 goto err_put;
1508         }
1509
1510         if (cmd->qp_type != IB_QPT_XRC_TGT) {
1511                 qp->real_qp       = qp;
1512                 qp->device        = device;
1513                 qp->pd            = pd;
1514                 qp->send_cq       = attr.send_cq;
1515                 qp->recv_cq       = attr.recv_cq;
1516                 qp->srq           = attr.srq;
1517                 qp->rwq_ind_tbl   = ind_tbl;
1518                 qp->event_handler = attr.event_handler;
1519                 qp->qp_context    = attr.qp_context;
1520                 qp->qp_type       = attr.qp_type;
1521                 atomic_set(&qp->usecnt, 0);
1522                 atomic_inc(&pd->usecnt);
1523                 if (attr.send_cq)
1524                         atomic_inc(&attr.send_cq->usecnt);
1525                 if (attr.recv_cq)
1526                         atomic_inc(&attr.recv_cq->usecnt);
1527                 if (attr.srq)
1528                         atomic_inc(&attr.srq->usecnt);
1529                 if (ind_tbl)
1530                         atomic_inc(&ind_tbl->usecnt);
1531         }
1532         qp->uobject = &obj->uevent.uobject;
1533
1534         obj->uevent.uobject.object = qp;
1535
1536         memset(&resp, 0, sizeof resp);
1537         resp.base.qpn             = qp->qp_num;
1538         resp.base.qp_handle       = obj->uevent.uobject.id;
1539         resp.base.max_recv_sge    = attr.cap.max_recv_sge;
1540         resp.base.max_send_sge    = attr.cap.max_send_sge;
1541         resp.base.max_recv_wr     = attr.cap.max_recv_wr;
1542         resp.base.max_send_wr     = attr.cap.max_send_wr;
1543         resp.base.max_inline_data = attr.cap.max_inline_data;
1544
1545         resp.response_length = offsetof(typeof(resp), response_length) +
1546                                sizeof(resp.response_length);
1547
1548         ret = cb(file, &resp, ucore);
1549         if (ret)
1550                 goto err_cb;
1551
1552         if (xrcd) {
1553                 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object,
1554                                           uobject);
1555                 atomic_inc(&obj->uxrcd->refcnt);
1556                 uobj_put_read(xrcd_uobj);
1557         }
1558
1559         if (pd)
1560                 uobj_put_obj_read(pd);
1561         if (scq)
1562                 uobj_put_obj_read(scq);
1563         if (rcq && rcq != scq)
1564                 uobj_put_obj_read(rcq);
1565         if (srq)
1566                 uobj_put_obj_read(srq);
1567         if (ind_tbl)
1568                 uobj_put_obj_read(ind_tbl);
1569
1570         uobj_alloc_commit(&obj->uevent.uobject);
1571
1572         return 0;
1573 err_cb:
1574         ib_destroy_qp(qp);
1575
1576 err_put:
1577         if (!IS_ERR(xrcd_uobj))
1578                 uobj_put_read(xrcd_uobj);
1579         if (pd)
1580                 uobj_put_obj_read(pd);
1581         if (scq)
1582                 uobj_put_obj_read(scq);
1583         if (rcq && rcq != scq)
1584                 uobj_put_obj_read(rcq);
1585         if (srq)
1586                 uobj_put_obj_read(srq);
1587         if (ind_tbl)
1588                 uobj_put_obj_read(ind_tbl);
1589
1590         uobj_alloc_abort(&obj->uevent.uobject);
1591         return ret;
1592 }
1593
1594 static int ib_uverbs_create_qp_cb(struct ib_uverbs_file *file,
1595                                   struct ib_uverbs_ex_create_qp_resp *resp,
1596                                   struct ib_udata *ucore)
1597 {
1598         if (ib_copy_to_udata(ucore, &resp->base, sizeof(resp->base)))
1599                 return -EFAULT;
1600
1601         return 0;
1602 }
1603
1604 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1605                             struct ib_device *ib_dev,
1606                             const char __user *buf, int in_len,
1607                             int out_len)
1608 {
1609         struct ib_uverbs_create_qp      cmd;
1610         struct ib_uverbs_ex_create_qp   cmd_ex;
1611         struct ib_udata                 ucore;
1612         struct ib_udata                 uhw;
1613         ssize_t resp_size = sizeof(struct ib_uverbs_create_qp_resp);
1614         int                             err;
1615
1616         if (out_len < resp_size)
1617                 return -ENOSPC;
1618
1619         if (copy_from_user(&cmd, buf, sizeof(cmd)))
1620                 return -EFAULT;
1621
1622         INIT_UDATA(&ucore, buf, (unsigned long)cmd.response, sizeof(cmd),
1623                    resp_size);
1624         INIT_UDATA(&uhw, buf + sizeof(cmd),
1625                    (unsigned long)cmd.response + resp_size,
1626                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
1627                    out_len - resp_size);
1628
1629         memset(&cmd_ex, 0, sizeof(cmd_ex));
1630         cmd_ex.user_handle = cmd.user_handle;
1631         cmd_ex.pd_handle = cmd.pd_handle;
1632         cmd_ex.send_cq_handle = cmd.send_cq_handle;
1633         cmd_ex.recv_cq_handle = cmd.recv_cq_handle;
1634         cmd_ex.srq_handle = cmd.srq_handle;
1635         cmd_ex.max_send_wr = cmd.max_send_wr;
1636         cmd_ex.max_recv_wr = cmd.max_recv_wr;
1637         cmd_ex.max_send_sge = cmd.max_send_sge;
1638         cmd_ex.max_recv_sge = cmd.max_recv_sge;
1639         cmd_ex.max_inline_data = cmd.max_inline_data;
1640         cmd_ex.sq_sig_all = cmd.sq_sig_all;
1641         cmd_ex.qp_type = cmd.qp_type;
1642         cmd_ex.is_srq = cmd.is_srq;
1643
1644         err = create_qp(file, &ucore, &uhw, &cmd_ex,
1645                         offsetof(typeof(cmd_ex), is_srq) +
1646                         sizeof(cmd.is_srq), ib_uverbs_create_qp_cb,
1647                         NULL);
1648
1649         if (err)
1650                 return err;
1651
1652         return in_len;
1653 }
1654
1655 static int ib_uverbs_ex_create_qp_cb(struct ib_uverbs_file *file,
1656                                      struct ib_uverbs_ex_create_qp_resp *resp,
1657                                      struct ib_udata *ucore)
1658 {
1659         if (ib_copy_to_udata(ucore, resp, resp->response_length))
1660                 return -EFAULT;
1661
1662         return 0;
1663 }
1664
1665 int ib_uverbs_ex_create_qp(struct ib_uverbs_file *file,
1666                            struct ib_device *ib_dev,
1667                            struct ib_udata *ucore,
1668                            struct ib_udata *uhw)
1669 {
1670         struct ib_uverbs_ex_create_qp_resp resp;
1671         struct ib_uverbs_ex_create_qp cmd = {0};
1672         int err;
1673
1674         if (ucore->inlen < (offsetof(typeof(cmd), comp_mask) +
1675                             sizeof(cmd.comp_mask)))
1676                 return -EINVAL;
1677
1678         err = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
1679         if (err)
1680                 return err;
1681
1682         if (cmd.comp_mask & ~IB_UVERBS_CREATE_QP_SUP_COMP_MASK)
1683                 return -EINVAL;
1684
1685         if (cmd.reserved)
1686                 return -EINVAL;
1687
1688         if (ucore->outlen < (offsetof(typeof(resp), response_length) +
1689                              sizeof(resp.response_length)))
1690                 return -ENOSPC;
1691
1692         err = create_qp(file, ucore, uhw, &cmd,
1693                         min(ucore->inlen, sizeof(cmd)),
1694                         ib_uverbs_ex_create_qp_cb, NULL);
1695
1696         if (err)
1697                 return err;
1698
1699         return 0;
1700 }
1701
1702 ssize_t ib_uverbs_open_qp(struct ib_uverbs_file *file,
1703                           struct ib_device *ib_dev,
1704                           const char __user *buf, int in_len, int out_len)
1705 {
1706         struct ib_uverbs_open_qp        cmd;
1707         struct ib_uverbs_create_qp_resp resp;
1708         struct ib_udata                 udata;
1709         struct ib_uqp_object           *obj;
1710         struct ib_xrcd                 *xrcd;
1711         struct ib_uobject              *uninitialized_var(xrcd_uobj);
1712         struct ib_qp                   *qp;
1713         struct ib_qp_open_attr          attr;
1714         int ret;
1715
1716         if (out_len < sizeof resp)
1717                 return -ENOSPC;
1718
1719         if (copy_from_user(&cmd, buf, sizeof cmd))
1720                 return -EFAULT;
1721
1722         INIT_UDATA(&udata, buf + sizeof cmd,
1723                    (unsigned long) cmd.response + sizeof resp,
1724                    in_len - sizeof cmd, out_len - sizeof resp);
1725
1726         obj  = (struct ib_uqp_object *)uobj_alloc(uobj_get_type(qp),
1727                                                   file->ucontext);
1728         if (IS_ERR(obj))
1729                 return PTR_ERR(obj);
1730
1731         xrcd_uobj = uobj_get_read(uobj_get_type(xrcd), cmd.pd_handle,
1732                                   file->ucontext);
1733         if (IS_ERR(xrcd_uobj)) {
1734                 ret = -EINVAL;
1735                 goto err_put;
1736         }
1737
1738         xrcd = (struct ib_xrcd *)xrcd_uobj->object;
1739         if (!xrcd) {
1740                 ret = -EINVAL;
1741                 goto err_xrcd;
1742         }
1743
1744         attr.event_handler = ib_uverbs_qp_event_handler;
1745         attr.qp_context    = file;
1746         attr.qp_num        = cmd.qpn;
1747         attr.qp_type       = cmd.qp_type;
1748
1749         obj->uevent.events_reported = 0;
1750         INIT_LIST_HEAD(&obj->uevent.event_list);
1751         INIT_LIST_HEAD(&obj->mcast_list);
1752
1753         qp = ib_open_qp(xrcd, &attr);
1754         if (IS_ERR(qp)) {
1755                 ret = PTR_ERR(qp);
1756                 goto err_xrcd;
1757         }
1758
1759         obj->uevent.uobject.object = qp;
1760         obj->uevent.uobject.user_handle = cmd.user_handle;
1761
1762         memset(&resp, 0, sizeof resp);
1763         resp.qpn       = qp->qp_num;
1764         resp.qp_handle = obj->uevent.uobject.id;
1765
1766         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1767                          &resp, sizeof resp)) {
1768                 ret = -EFAULT;
1769                 goto err_destroy;
1770         }
1771
1772         obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
1773         atomic_inc(&obj->uxrcd->refcnt);
1774         qp->uobject = &obj->uevent.uobject;
1775         uobj_put_read(xrcd_uobj);
1776
1777
1778         uobj_alloc_commit(&obj->uevent.uobject);
1779
1780         return in_len;
1781
1782 err_destroy:
1783         ib_destroy_qp(qp);
1784 err_xrcd:
1785         uobj_put_read(xrcd_uobj);
1786 err_put:
1787         uobj_alloc_abort(&obj->uevent.uobject);
1788         return ret;
1789 }
1790
1791 ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
1792                            struct ib_device *ib_dev,
1793                            const char __user *buf, int in_len,
1794                            int out_len)
1795 {
1796         struct ib_uverbs_query_qp      cmd;
1797         struct ib_uverbs_query_qp_resp resp;
1798         struct ib_qp                   *qp;
1799         struct ib_qp_attr              *attr;
1800         struct ib_qp_init_attr         *init_attr;
1801         const struct ib_global_route   *grh;
1802         int                            ret;
1803
1804         if (copy_from_user(&cmd, buf, sizeof cmd))
1805                 return -EFAULT;
1806
1807         attr      = kmalloc(sizeof *attr, GFP_KERNEL);
1808         init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1809         if (!attr || !init_attr) {
1810                 ret = -ENOMEM;
1811                 goto out;
1812         }
1813
1814         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
1815         if (!qp) {
1816                 ret = -EINVAL;
1817                 goto out;
1818         }
1819
1820         ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1821
1822         uobj_put_obj_read(qp);
1823
1824         if (ret)
1825                 goto out;
1826
1827         memset(&resp, 0, sizeof resp);
1828
1829         resp.qp_state               = attr->qp_state;
1830         resp.cur_qp_state           = attr->cur_qp_state;
1831         resp.path_mtu               = attr->path_mtu;
1832         resp.path_mig_state         = attr->path_mig_state;
1833         resp.qkey                   = attr->qkey;
1834         resp.rq_psn                 = attr->rq_psn;
1835         resp.sq_psn                 = attr->sq_psn;
1836         resp.dest_qp_num            = attr->dest_qp_num;
1837         resp.qp_access_flags        = attr->qp_access_flags;
1838         resp.pkey_index             = attr->pkey_index;
1839         resp.alt_pkey_index         = attr->alt_pkey_index;
1840         resp.sq_draining            = attr->sq_draining;
1841         resp.max_rd_atomic          = attr->max_rd_atomic;
1842         resp.max_dest_rd_atomic     = attr->max_dest_rd_atomic;
1843         resp.min_rnr_timer          = attr->min_rnr_timer;
1844         resp.port_num               = attr->port_num;
1845         resp.timeout                = attr->timeout;
1846         resp.retry_cnt              = attr->retry_cnt;
1847         resp.rnr_retry              = attr->rnr_retry;
1848         resp.alt_port_num           = attr->alt_port_num;
1849         resp.alt_timeout            = attr->alt_timeout;
1850
1851         resp.dest.dlid              = rdma_ah_get_dlid(&attr->ah_attr);
1852         resp.dest.sl                = rdma_ah_get_sl(&attr->ah_attr);
1853         resp.dest.src_path_bits     = rdma_ah_get_path_bits(&attr->ah_attr);
1854         resp.dest.static_rate       = rdma_ah_get_static_rate(&attr->ah_attr);
1855         resp.dest.is_global         = !!(rdma_ah_get_ah_flags(&attr->ah_attr) &
1856                                          IB_AH_GRH);
1857         if (resp.dest.is_global) {
1858                 grh = rdma_ah_read_grh(&attr->ah_attr);
1859                 memcpy(resp.dest.dgid, grh->dgid.raw, 16);
1860                 resp.dest.flow_label        = grh->flow_label;
1861                 resp.dest.sgid_index        = grh->sgid_index;
1862                 resp.dest.hop_limit         = grh->hop_limit;
1863                 resp.dest.traffic_class     = grh->traffic_class;
1864         }
1865         resp.dest.port_num          = rdma_ah_get_port_num(&attr->ah_attr);
1866
1867         resp.alt_dest.dlid          = rdma_ah_get_dlid(&attr->alt_ah_attr);
1868         resp.alt_dest.sl            = rdma_ah_get_sl(&attr->alt_ah_attr);
1869         resp.alt_dest.src_path_bits = rdma_ah_get_path_bits(&attr->alt_ah_attr);
1870         resp.alt_dest.static_rate
1871                         = rdma_ah_get_static_rate(&attr->alt_ah_attr);
1872         resp.alt_dest.is_global
1873                         = !!(rdma_ah_get_ah_flags(&attr->alt_ah_attr) &
1874                                                   IB_AH_GRH);
1875         if (resp.alt_dest.is_global) {
1876                 grh = rdma_ah_read_grh(&attr->alt_ah_attr);
1877                 memcpy(resp.alt_dest.dgid, grh->dgid.raw, 16);
1878                 resp.alt_dest.flow_label    = grh->flow_label;
1879                 resp.alt_dest.sgid_index    = grh->sgid_index;
1880                 resp.alt_dest.hop_limit     = grh->hop_limit;
1881                 resp.alt_dest.traffic_class = grh->traffic_class;
1882         }
1883         resp.alt_dest.port_num      = rdma_ah_get_port_num(&attr->alt_ah_attr);
1884
1885         resp.max_send_wr            = init_attr->cap.max_send_wr;
1886         resp.max_recv_wr            = init_attr->cap.max_recv_wr;
1887         resp.max_send_sge           = init_attr->cap.max_send_sge;
1888         resp.max_recv_sge           = init_attr->cap.max_recv_sge;
1889         resp.max_inline_data        = init_attr->cap.max_inline_data;
1890         resp.sq_sig_all             = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1891
1892         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1893                          &resp, sizeof resp))
1894                 ret = -EFAULT;
1895
1896 out:
1897         kfree(attr);
1898         kfree(init_attr);
1899
1900         return ret ? ret : in_len;
1901 }
1902
1903 /* Remove ignored fields set in the attribute mask */
1904 static int modify_qp_mask(enum ib_qp_type qp_type, int mask)
1905 {
1906         switch (qp_type) {
1907         case IB_QPT_XRC_INI:
1908                 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER);
1909         case IB_QPT_XRC_TGT:
1910                 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT |
1911                                 IB_QP_RNR_RETRY);
1912         default:
1913                 return mask;
1914         }
1915 }
1916
1917 static int modify_qp(struct ib_uverbs_file *file,
1918                      struct ib_uverbs_ex_modify_qp *cmd, struct ib_udata *udata)
1919 {
1920         struct ib_qp_attr *attr;
1921         struct ib_qp *qp;
1922         int ret;
1923
1924         attr = kmalloc(sizeof *attr, GFP_KERNEL);
1925         if (!attr)
1926                 return -ENOMEM;
1927
1928         qp = uobj_get_obj_read(qp, cmd->base.qp_handle, file->ucontext);
1929         if (!qp) {
1930                 ret = -EINVAL;
1931                 goto out;
1932         }
1933
1934         if (!rdma_is_port_valid(qp->device, cmd->base.port_num)) {
1935                 ret = -EINVAL;
1936                 goto release_qp;
1937         }
1938
1939         attr->qp_state            = cmd->base.qp_state;
1940         attr->cur_qp_state        = cmd->base.cur_qp_state;
1941         attr->path_mtu            = cmd->base.path_mtu;
1942         attr->path_mig_state      = cmd->base.path_mig_state;
1943         attr->qkey                = cmd->base.qkey;
1944         attr->rq_psn              = cmd->base.rq_psn;
1945         attr->sq_psn              = cmd->base.sq_psn;
1946         attr->dest_qp_num         = cmd->base.dest_qp_num;
1947         attr->qp_access_flags     = cmd->base.qp_access_flags;
1948         attr->pkey_index          = cmd->base.pkey_index;
1949         attr->alt_pkey_index      = cmd->base.alt_pkey_index;
1950         attr->en_sqd_async_notify = cmd->base.en_sqd_async_notify;
1951         attr->max_rd_atomic       = cmd->base.max_rd_atomic;
1952         attr->max_dest_rd_atomic  = cmd->base.max_dest_rd_atomic;
1953         attr->min_rnr_timer       = cmd->base.min_rnr_timer;
1954         attr->port_num            = cmd->base.port_num;
1955         attr->timeout             = cmd->base.timeout;
1956         attr->retry_cnt           = cmd->base.retry_cnt;
1957         attr->rnr_retry           = cmd->base.rnr_retry;
1958         attr->alt_port_num        = cmd->base.alt_port_num;
1959         attr->alt_timeout         = cmd->base.alt_timeout;
1960         attr->rate_limit          = cmd->rate_limit;
1961
1962         attr->ah_attr.type = rdma_ah_find_type(qp->device,
1963                                                cmd->base.dest.port_num);
1964         if (cmd->base.dest.is_global) {
1965                 rdma_ah_set_grh(&attr->ah_attr, NULL,
1966                                 cmd->base.dest.flow_label,
1967                                 cmd->base.dest.sgid_index,
1968                                 cmd->base.dest.hop_limit,
1969                                 cmd->base.dest.traffic_class);
1970                 rdma_ah_set_dgid_raw(&attr->ah_attr, cmd->base.dest.dgid);
1971         } else {
1972                 rdma_ah_set_ah_flags(&attr->ah_attr, 0);
1973         }
1974         rdma_ah_set_dlid(&attr->ah_attr, cmd->base.dest.dlid);
1975         rdma_ah_set_sl(&attr->ah_attr, cmd->base.dest.sl);
1976         rdma_ah_set_path_bits(&attr->ah_attr, cmd->base.dest.src_path_bits);
1977         rdma_ah_set_static_rate(&attr->ah_attr, cmd->base.dest.static_rate);
1978         rdma_ah_set_port_num(&attr->ah_attr,
1979                              cmd->base.dest.port_num);
1980
1981         attr->alt_ah_attr.type = rdma_ah_find_type(qp->device,
1982                                                    cmd->base.dest.port_num);
1983         if (cmd->base.alt_dest.is_global) {
1984                 rdma_ah_set_grh(&attr->alt_ah_attr, NULL,
1985                                 cmd->base.alt_dest.flow_label,
1986                                 cmd->base.alt_dest.sgid_index,
1987                                 cmd->base.alt_dest.hop_limit,
1988                                 cmd->base.alt_dest.traffic_class);
1989                 rdma_ah_set_dgid_raw(&attr->alt_ah_attr,
1990                                      cmd->base.alt_dest.dgid);
1991         } else {
1992                 rdma_ah_set_ah_flags(&attr->alt_ah_attr, 0);
1993         }
1994
1995         rdma_ah_set_dlid(&attr->alt_ah_attr, cmd->base.alt_dest.dlid);
1996         rdma_ah_set_sl(&attr->alt_ah_attr, cmd->base.alt_dest.sl);
1997         rdma_ah_set_path_bits(&attr->alt_ah_attr,
1998                               cmd->base.alt_dest.src_path_bits);
1999         rdma_ah_set_static_rate(&attr->alt_ah_attr,
2000                                 cmd->base.alt_dest.static_rate);
2001         rdma_ah_set_port_num(&attr->alt_ah_attr,
2002                              cmd->base.alt_dest.port_num);
2003
2004         if (qp->real_qp == qp) {
2005                 if (cmd->base.attr_mask & IB_QP_AV) {
2006                         ret = ib_resolve_eth_dmac(qp->device, &attr->ah_attr);
2007                         if (ret)
2008                                 goto release_qp;
2009                 }
2010                 ret = qp->device->modify_qp(qp, attr,
2011                                             modify_qp_mask(qp->qp_type,
2012                                                            cmd->base.attr_mask),
2013                                             udata);
2014         } else {
2015                 ret = ib_modify_qp(qp, attr,
2016                                    modify_qp_mask(qp->qp_type,
2017                                                   cmd->base.attr_mask));
2018         }
2019
2020 release_qp:
2021         uobj_put_obj_read(qp);
2022
2023 out:
2024         kfree(attr);
2025
2026         return ret;
2027 }
2028
2029 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
2030                             struct ib_device *ib_dev,
2031                             const char __user *buf, int in_len,
2032                             int out_len)
2033 {
2034         struct ib_uverbs_ex_modify_qp cmd = {};
2035         struct ib_udata udata;
2036         int ret;
2037
2038         if (copy_from_user(&cmd.base, buf, sizeof(cmd.base)))
2039                 return -EFAULT;
2040
2041         if (cmd.base.attr_mask &
2042             ~((IB_USER_LEGACY_LAST_QP_ATTR_MASK << 1) - 1))
2043                 return -EOPNOTSUPP;
2044
2045         INIT_UDATA(&udata, buf + sizeof(cmd.base), NULL,
2046                    in_len - sizeof(cmd.base), out_len);
2047
2048         ret = modify_qp(file, &cmd, &udata);
2049         if (ret)
2050                 return ret;
2051
2052         return in_len;
2053 }
2054
2055 int ib_uverbs_ex_modify_qp(struct ib_uverbs_file *file,
2056                            struct ib_device *ib_dev,
2057                            struct ib_udata *ucore,
2058                            struct ib_udata *uhw)
2059 {
2060         struct ib_uverbs_ex_modify_qp cmd = {};
2061         int ret;
2062
2063         /*
2064          * Last bit is reserved for extending the attr_mask by
2065          * using another field.
2066          */
2067         BUILD_BUG_ON(IB_USER_LAST_QP_ATTR_MASK == (1 << 31));
2068
2069         if (ucore->inlen < sizeof(cmd.base))
2070                 return -EINVAL;
2071
2072         ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
2073         if (ret)
2074                 return ret;
2075
2076         if (cmd.base.attr_mask &
2077             ~((IB_USER_LAST_QP_ATTR_MASK << 1) - 1))
2078                 return -EOPNOTSUPP;
2079
2080         if (ucore->inlen > sizeof(cmd)) {
2081                 if (ib_is_udata_cleared(ucore, sizeof(cmd),
2082                                         ucore->inlen - sizeof(cmd)))
2083                         return -EOPNOTSUPP;
2084         }
2085
2086         ret = modify_qp(file, &cmd, uhw);
2087
2088         return ret;
2089 }
2090
2091 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
2092                              struct ib_device *ib_dev,
2093                              const char __user *buf, int in_len,
2094                              int out_len)
2095 {
2096         struct ib_uverbs_destroy_qp      cmd;
2097         struct ib_uverbs_destroy_qp_resp resp;
2098         struct ib_uobject               *uobj;
2099         struct ib_qp                    *qp;
2100         struct ib_uqp_object            *obj;
2101         int                              ret = -EINVAL;
2102
2103         if (copy_from_user(&cmd, buf, sizeof cmd))
2104                 return -EFAULT;
2105
2106         memset(&resp, 0, sizeof resp);
2107
2108         uobj  = uobj_get_write(uobj_get_type(qp), cmd.qp_handle,
2109                                file->ucontext);
2110         if (IS_ERR(uobj))
2111                 return PTR_ERR(uobj);
2112
2113         qp  = uobj->object;
2114         obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
2115         /*
2116          * Make sure we don't free the memory in remove_commit as we still
2117          * needs the uobject memory to create the response.
2118          */
2119         uverbs_uobject_get(uobj);
2120
2121         ret = uobj_remove_commit(uobj);
2122         if (ret) {
2123                 uverbs_uobject_put(uobj);
2124                 return ret;
2125         }
2126
2127         resp.events_reported = obj->uevent.events_reported;
2128         uverbs_uobject_put(uobj);
2129
2130         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2131                          &resp, sizeof resp))
2132                 return -EFAULT;
2133
2134         return in_len;
2135 }
2136
2137 static void *alloc_wr(size_t wr_size, __u32 num_sge)
2138 {
2139         if (num_sge >= (U32_MAX - ALIGN(wr_size, sizeof (struct ib_sge))) /
2140                        sizeof (struct ib_sge))
2141                 return NULL;
2142
2143         return kmalloc(ALIGN(wr_size, sizeof (struct ib_sge)) +
2144                          num_sge * sizeof (struct ib_sge), GFP_KERNEL);
2145 }
2146
2147 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
2148                             struct ib_device *ib_dev,
2149                             const char __user *buf, int in_len,
2150                             int out_len)
2151 {
2152         struct ib_uverbs_post_send      cmd;
2153         struct ib_uverbs_post_send_resp resp;
2154         struct ib_uverbs_send_wr       *user_wr;
2155         struct ib_send_wr              *wr = NULL, *last, *next, *bad_wr;
2156         struct ib_qp                   *qp;
2157         int                             i, sg_ind;
2158         int                             is_ud;
2159         ssize_t                         ret = -EINVAL;
2160         size_t                          next_size;
2161
2162         if (copy_from_user(&cmd, buf, sizeof cmd))
2163                 return -EFAULT;
2164
2165         if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
2166             cmd.sge_count * sizeof (struct ib_uverbs_sge))
2167                 return -EINVAL;
2168
2169         if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
2170                 return -EINVAL;
2171
2172         user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
2173         if (!user_wr)
2174                 return -ENOMEM;
2175
2176         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
2177         if (!qp)
2178                 goto out;
2179
2180         is_ud = qp->qp_type == IB_QPT_UD;
2181         sg_ind = 0;
2182         last = NULL;
2183         for (i = 0; i < cmd.wr_count; ++i) {
2184                 if (copy_from_user(user_wr,
2185                                    buf + sizeof cmd + i * cmd.wqe_size,
2186                                    cmd.wqe_size)) {
2187                         ret = -EFAULT;
2188                         goto out_put;
2189                 }
2190
2191                 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
2192                         ret = -EINVAL;
2193                         goto out_put;
2194                 }
2195
2196                 if (is_ud) {
2197                         struct ib_ud_wr *ud;
2198
2199                         if (user_wr->opcode != IB_WR_SEND &&
2200                             user_wr->opcode != IB_WR_SEND_WITH_IMM) {
2201                                 ret = -EINVAL;
2202                                 goto out_put;
2203                         }
2204
2205                         next_size = sizeof(*ud);
2206                         ud = alloc_wr(next_size, user_wr->num_sge);
2207                         if (!ud) {
2208                                 ret = -ENOMEM;
2209                                 goto out_put;
2210                         }
2211
2212                         ud->ah = uobj_get_obj_read(ah, user_wr->wr.ud.ah,
2213                                                    file->ucontext);
2214                         if (!ud->ah) {
2215                                 kfree(ud);
2216                                 ret = -EINVAL;
2217                                 goto out_put;
2218                         }
2219                         ud->remote_qpn = user_wr->wr.ud.remote_qpn;
2220                         ud->remote_qkey = user_wr->wr.ud.remote_qkey;
2221
2222                         next = &ud->wr;
2223                 } else if (user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM ||
2224                            user_wr->opcode == IB_WR_RDMA_WRITE ||
2225                            user_wr->opcode == IB_WR_RDMA_READ) {
2226                         struct ib_rdma_wr *rdma;
2227
2228                         next_size = sizeof(*rdma);
2229                         rdma = alloc_wr(next_size, user_wr->num_sge);
2230                         if (!rdma) {
2231                                 ret = -ENOMEM;
2232                                 goto out_put;
2233                         }
2234
2235                         rdma->remote_addr = user_wr->wr.rdma.remote_addr;
2236                         rdma->rkey = user_wr->wr.rdma.rkey;
2237
2238                         next = &rdma->wr;
2239                 } else if (user_wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP ||
2240                            user_wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) {
2241                         struct ib_atomic_wr *atomic;
2242
2243                         next_size = sizeof(*atomic);
2244                         atomic = alloc_wr(next_size, user_wr->num_sge);
2245                         if (!atomic) {
2246                                 ret = -ENOMEM;
2247                                 goto out_put;
2248                         }
2249
2250                         atomic->remote_addr = user_wr->wr.atomic.remote_addr;
2251                         atomic->compare_add = user_wr->wr.atomic.compare_add;
2252                         atomic->swap = user_wr->wr.atomic.swap;
2253                         atomic->rkey = user_wr->wr.atomic.rkey;
2254
2255                         next = &atomic->wr;
2256                 } else if (user_wr->opcode == IB_WR_SEND ||
2257                            user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2258                            user_wr->opcode == IB_WR_SEND_WITH_INV) {
2259                         next_size = sizeof(*next);
2260                         next = alloc_wr(next_size, user_wr->num_sge);
2261                         if (!next) {
2262                                 ret = -ENOMEM;
2263                                 goto out_put;
2264                         }
2265                 } else {
2266                         ret = -EINVAL;
2267                         goto out_put;
2268                 }
2269
2270                 if (user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2271                     user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) {
2272                         next->ex.imm_data =
2273                                         (__be32 __force) user_wr->ex.imm_data;
2274                 } else if (user_wr->opcode == IB_WR_SEND_WITH_INV) {
2275                         next->ex.invalidate_rkey = user_wr->ex.invalidate_rkey;
2276                 }
2277
2278                 if (!last)
2279                         wr = next;
2280                 else
2281                         last->next = next;
2282                 last = next;
2283
2284                 next->next       = NULL;
2285                 next->wr_id      = user_wr->wr_id;
2286                 next->num_sge    = user_wr->num_sge;
2287                 next->opcode     = user_wr->opcode;
2288                 next->send_flags = user_wr->send_flags;
2289
2290                 if (next->num_sge) {
2291                         next->sg_list = (void *) next +
2292                                 ALIGN(next_size, sizeof(struct ib_sge));
2293                         if (copy_from_user(next->sg_list,
2294                                            buf + sizeof cmd +
2295                                            cmd.wr_count * cmd.wqe_size +
2296                                            sg_ind * sizeof (struct ib_sge),
2297                                            next->num_sge * sizeof (struct ib_sge))) {
2298                                 ret = -EFAULT;
2299                                 goto out_put;
2300                         }
2301                         sg_ind += next->num_sge;
2302                 } else
2303                         next->sg_list = NULL;
2304         }
2305
2306         resp.bad_wr = 0;
2307         ret = qp->device->post_send(qp->real_qp, wr, &bad_wr);
2308         if (ret)
2309                 for (next = wr; next; next = next->next) {
2310                         ++resp.bad_wr;
2311                         if (next == bad_wr)
2312                                 break;
2313                 }
2314
2315         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2316                          &resp, sizeof resp))
2317                 ret = -EFAULT;
2318
2319 out_put:
2320         uobj_put_obj_read(qp);
2321
2322         while (wr) {
2323                 if (is_ud && ud_wr(wr)->ah)
2324                         uobj_put_obj_read(ud_wr(wr)->ah);
2325                 next = wr->next;
2326                 kfree(wr);
2327                 wr = next;
2328         }
2329
2330 out:
2331         kfree(user_wr);
2332
2333         return ret ? ret : in_len;
2334 }
2335
2336 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
2337                                                     int in_len,
2338                                                     u32 wr_count,
2339                                                     u32 sge_count,
2340                                                     u32 wqe_size)
2341 {
2342         struct ib_uverbs_recv_wr *user_wr;
2343         struct ib_recv_wr        *wr = NULL, *last, *next;
2344         int                       sg_ind;
2345         int                       i;
2346         int                       ret;
2347
2348         if (in_len < wqe_size * wr_count +
2349             sge_count * sizeof (struct ib_uverbs_sge))
2350                 return ERR_PTR(-EINVAL);
2351
2352         if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
2353                 return ERR_PTR(-EINVAL);
2354
2355         user_wr = kmalloc(wqe_size, GFP_KERNEL);
2356         if (!user_wr)
2357                 return ERR_PTR(-ENOMEM);
2358
2359         sg_ind = 0;
2360         last = NULL;
2361         for (i = 0; i < wr_count; ++i) {
2362                 if (copy_from_user(user_wr, buf + i * wqe_size,
2363                                    wqe_size)) {
2364                         ret = -EFAULT;
2365                         goto err;
2366                 }
2367
2368                 if (user_wr->num_sge + sg_ind > sge_count) {
2369                         ret = -EINVAL;
2370                         goto err;
2371                 }
2372
2373                 if (user_wr->num_sge >=
2374                     (U32_MAX - ALIGN(sizeof *next, sizeof (struct ib_sge))) /
2375                     sizeof (struct ib_sge)) {
2376                         ret = -EINVAL;
2377                         goto err;
2378                 }
2379
2380                 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2381                                user_wr->num_sge * sizeof (struct ib_sge),
2382                                GFP_KERNEL);
2383                 if (!next) {
2384                         ret = -ENOMEM;
2385                         goto err;
2386                 }
2387
2388                 if (!last)
2389                         wr = next;
2390                 else
2391                         last->next = next;
2392                 last = next;
2393
2394                 next->next       = NULL;
2395                 next->wr_id      = user_wr->wr_id;
2396                 next->num_sge    = user_wr->num_sge;
2397
2398                 if (next->num_sge) {
2399                         next->sg_list = (void *) next +
2400                                 ALIGN(sizeof *next, sizeof (struct ib_sge));
2401                         if (copy_from_user(next->sg_list,
2402                                            buf + wr_count * wqe_size +
2403                                            sg_ind * sizeof (struct ib_sge),
2404                                            next->num_sge * sizeof (struct ib_sge))) {
2405                                 ret = -EFAULT;
2406                                 goto err;
2407                         }
2408                         sg_ind += next->num_sge;
2409                 } else
2410                         next->sg_list = NULL;
2411         }
2412
2413         kfree(user_wr);
2414         return wr;
2415
2416 err:
2417         kfree(user_wr);
2418
2419         while (wr) {
2420                 next = wr->next;
2421                 kfree(wr);
2422                 wr = next;
2423         }
2424
2425         return ERR_PTR(ret);
2426 }
2427
2428 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
2429                             struct ib_device *ib_dev,
2430                             const char __user *buf, int in_len,
2431                             int out_len)
2432 {
2433         struct ib_uverbs_post_recv      cmd;
2434         struct ib_uverbs_post_recv_resp resp;
2435         struct ib_recv_wr              *wr, *next, *bad_wr;
2436         struct ib_qp                   *qp;
2437         ssize_t                         ret = -EINVAL;
2438
2439         if (copy_from_user(&cmd, buf, sizeof cmd))
2440                 return -EFAULT;
2441
2442         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2443                                        in_len - sizeof cmd, cmd.wr_count,
2444                                        cmd.sge_count, cmd.wqe_size);
2445         if (IS_ERR(wr))
2446                 return PTR_ERR(wr);
2447
2448         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
2449         if (!qp)
2450                 goto out;
2451
2452         resp.bad_wr = 0;
2453         ret = qp->device->post_recv(qp->real_qp, wr, &bad_wr);
2454
2455         uobj_put_obj_read(qp);
2456         if (ret) {
2457                 for (next = wr; next; next = next->next) {
2458                         ++resp.bad_wr;
2459                         if (next == bad_wr)
2460                                 break;
2461                 }
2462         }
2463
2464         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2465                          &resp, sizeof resp))
2466                 ret = -EFAULT;
2467
2468 out:
2469         while (wr) {
2470                 next = wr->next;
2471                 kfree(wr);
2472                 wr = next;
2473         }
2474
2475         return ret ? ret : in_len;
2476 }
2477
2478 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
2479                                 struct ib_device *ib_dev,
2480                                 const char __user *buf, int in_len,
2481                                 int out_len)
2482 {
2483         struct ib_uverbs_post_srq_recv      cmd;
2484         struct ib_uverbs_post_srq_recv_resp resp;
2485         struct ib_recv_wr                  *wr, *next, *bad_wr;
2486         struct ib_srq                      *srq;
2487         ssize_t                             ret = -EINVAL;
2488
2489         if (copy_from_user(&cmd, buf, sizeof cmd))
2490                 return -EFAULT;
2491
2492         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2493                                        in_len - sizeof cmd, cmd.wr_count,
2494                                        cmd.sge_count, cmd.wqe_size);
2495         if (IS_ERR(wr))
2496                 return PTR_ERR(wr);
2497
2498         srq = uobj_get_obj_read(srq, cmd.srq_handle, file->ucontext);
2499         if (!srq)
2500                 goto out;
2501
2502         resp.bad_wr = 0;
2503         ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
2504
2505         uobj_put_obj_read(srq);
2506
2507         if (ret)
2508                 for (next = wr; next; next = next->next) {
2509                         ++resp.bad_wr;
2510                         if (next == bad_wr)
2511                                 break;
2512                 }
2513
2514         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2515                          &resp, sizeof resp))
2516                 ret = -EFAULT;
2517
2518 out:
2519         while (wr) {
2520                 next = wr->next;
2521                 kfree(wr);
2522                 wr = next;
2523         }
2524
2525         return ret ? ret : in_len;
2526 }
2527
2528 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
2529                             struct ib_device *ib_dev,
2530                             const char __user *buf, int in_len,
2531                             int out_len)
2532 {
2533         struct ib_uverbs_create_ah       cmd;
2534         struct ib_uverbs_create_ah_resp  resp;
2535         struct ib_uobject               *uobj;
2536         struct ib_pd                    *pd;
2537         struct ib_ah                    *ah;
2538         struct rdma_ah_attr             attr;
2539         int ret;
2540         struct ib_udata                   udata;
2541         u8                              *dmac;
2542
2543         if (out_len < sizeof resp)
2544                 return -ENOSPC;
2545
2546         if (copy_from_user(&cmd, buf, sizeof cmd))
2547                 return -EFAULT;
2548
2549         if (!rdma_is_port_valid(ib_dev, cmd.attr.port_num))
2550                 return -EINVAL;
2551
2552         INIT_UDATA(&udata, buf + sizeof(cmd),
2553                    (unsigned long)cmd.response + sizeof(resp),
2554                    in_len - sizeof(cmd), out_len - sizeof(resp));
2555
2556         uobj  = uobj_alloc(uobj_get_type(ah), file->ucontext);
2557         if (IS_ERR(uobj))
2558                 return PTR_ERR(uobj);
2559
2560         pd = uobj_get_obj_read(pd, cmd.pd_handle, file->ucontext);
2561         if (!pd) {
2562                 ret = -EINVAL;
2563                 goto err;
2564         }
2565
2566         attr.type = rdma_ah_find_type(ib_dev, cmd.attr.port_num);
2567         rdma_ah_set_dlid(&attr, cmd.attr.dlid);
2568         rdma_ah_set_sl(&attr, cmd.attr.sl);
2569         rdma_ah_set_path_bits(&attr, cmd.attr.src_path_bits);
2570         rdma_ah_set_static_rate(&attr, cmd.attr.static_rate);
2571         rdma_ah_set_port_num(&attr, cmd.attr.port_num);
2572
2573         if (cmd.attr.is_global) {
2574                 rdma_ah_set_grh(&attr, NULL, cmd.attr.grh.flow_label,
2575                                 cmd.attr.grh.sgid_index,
2576                                 cmd.attr.grh.hop_limit,
2577                                 cmd.attr.grh.traffic_class);
2578                 rdma_ah_set_dgid_raw(&attr, cmd.attr.grh.dgid);
2579         } else {
2580                 rdma_ah_set_ah_flags(&attr, 0);
2581         }
2582         dmac = rdma_ah_retrieve_dmac(&attr);
2583         if (dmac)
2584                 memset(dmac, 0, ETH_ALEN);
2585
2586         ah = pd->device->create_ah(pd, &attr, &udata);
2587
2588         if (IS_ERR(ah)) {
2589                 ret = PTR_ERR(ah);
2590                 goto err_put;
2591         }
2592
2593         ah->device  = pd->device;
2594         ah->pd      = pd;
2595         atomic_inc(&pd->usecnt);
2596         ah->uobject  = uobj;
2597         uobj->user_handle = cmd.user_handle;
2598         uobj->object = ah;
2599
2600         resp.ah_handle = uobj->id;
2601
2602         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2603                          &resp, sizeof resp)) {
2604                 ret = -EFAULT;
2605                 goto err_copy;
2606         }
2607
2608         uobj_put_obj_read(pd);
2609         uobj_alloc_commit(uobj);
2610
2611         return in_len;
2612
2613 err_copy:
2614         rdma_destroy_ah(ah);
2615
2616 err_put:
2617         uobj_put_obj_read(pd);
2618
2619 err:
2620         uobj_alloc_abort(uobj);
2621         return ret;
2622 }
2623
2624 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
2625                              struct ib_device *ib_dev,
2626                              const char __user *buf, int in_len, int out_len)
2627 {
2628         struct ib_uverbs_destroy_ah cmd;
2629         struct ib_uobject          *uobj;
2630         int                         ret;
2631
2632         if (copy_from_user(&cmd, buf, sizeof cmd))
2633                 return -EFAULT;
2634
2635         uobj  = uobj_get_write(uobj_get_type(ah), cmd.ah_handle,
2636                                file->ucontext);
2637         if (IS_ERR(uobj))
2638                 return PTR_ERR(uobj);
2639
2640         ret = uobj_remove_commit(uobj);
2641         return ret ?: in_len;
2642 }
2643
2644 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
2645                                struct ib_device *ib_dev,
2646                                const char __user *buf, int in_len,
2647                                int out_len)
2648 {
2649         struct ib_uverbs_attach_mcast cmd;
2650         struct ib_qp                 *qp;
2651         struct ib_uqp_object         *obj;
2652         struct ib_uverbs_mcast_entry *mcast;
2653         int                           ret;
2654
2655         if (copy_from_user(&cmd, buf, sizeof cmd))
2656                 return -EFAULT;
2657
2658         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
2659         if (!qp)
2660                 return -EINVAL;
2661
2662         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2663
2664         mutex_lock(&obj->mcast_lock);
2665         list_for_each_entry(mcast, &obj->mcast_list, list)
2666                 if (cmd.mlid == mcast->lid &&
2667                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2668                         ret = 0;
2669                         goto out_put;
2670                 }
2671
2672         mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
2673         if (!mcast) {
2674                 ret = -ENOMEM;
2675                 goto out_put;
2676         }
2677
2678         mcast->lid = cmd.mlid;
2679         memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
2680
2681         ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
2682         if (!ret)
2683                 list_add_tail(&mcast->list, &obj->mcast_list);
2684         else
2685                 kfree(mcast);
2686
2687 out_put:
2688         mutex_unlock(&obj->mcast_lock);
2689         uobj_put_obj_read(qp);
2690
2691         return ret ? ret : in_len;
2692 }
2693
2694 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
2695                                struct ib_device *ib_dev,
2696                                const char __user *buf, int in_len,
2697                                int out_len)
2698 {
2699         struct ib_uverbs_detach_mcast cmd;
2700         struct ib_uqp_object         *obj;
2701         struct ib_qp                 *qp;
2702         struct ib_uverbs_mcast_entry *mcast;
2703         int                           ret = -EINVAL;
2704         bool                          found = false;
2705
2706         if (copy_from_user(&cmd, buf, sizeof cmd))
2707                 return -EFAULT;
2708
2709         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
2710         if (!qp)
2711                 return -EINVAL;
2712
2713         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2714         mutex_lock(&obj->mcast_lock);
2715
2716         list_for_each_entry(mcast, &obj->mcast_list, list)
2717                 if (cmd.mlid == mcast->lid &&
2718                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2719                         list_del(&mcast->list);
2720                         kfree(mcast);
2721                         found = true;
2722                         break;
2723                 }
2724
2725         if (!found) {
2726                 ret = -EINVAL;
2727                 goto out_put;
2728         }
2729
2730         ret = ib_detach_mcast(qp, (union ib_gid *)cmd.gid, cmd.mlid);
2731
2732 out_put:
2733         mutex_unlock(&obj->mcast_lock);
2734         uobj_put_obj_read(qp);
2735         return ret ? ret : in_len;
2736 }
2737
2738 static int kern_spec_to_ib_spec_action(struct ib_uverbs_flow_spec *kern_spec,
2739                                        union ib_flow_spec *ib_spec)
2740 {
2741         ib_spec->type = kern_spec->type;
2742         switch (ib_spec->type) {
2743         case IB_FLOW_SPEC_ACTION_TAG:
2744                 if (kern_spec->flow_tag.size !=
2745                     sizeof(struct ib_uverbs_flow_spec_action_tag))
2746                         return -EINVAL;
2747
2748                 ib_spec->flow_tag.size = sizeof(struct ib_flow_spec_action_tag);
2749                 ib_spec->flow_tag.tag_id = kern_spec->flow_tag.tag_id;
2750                 break;
2751         case IB_FLOW_SPEC_ACTION_DROP:
2752                 if (kern_spec->drop.size !=
2753                     sizeof(struct ib_uverbs_flow_spec_action_drop))
2754                         return -EINVAL;
2755
2756                 ib_spec->drop.size = sizeof(struct ib_flow_spec_action_drop);
2757                 break;
2758         default:
2759                 return -EINVAL;
2760         }
2761         return 0;
2762 }
2763
2764 static size_t kern_spec_filter_sz(struct ib_uverbs_flow_spec_hdr *spec)
2765 {
2766         /* Returns user space filter size, includes padding */
2767         return (spec->size - sizeof(struct ib_uverbs_flow_spec_hdr)) / 2;
2768 }
2769
2770 static ssize_t spec_filter_size(void *kern_spec_filter, u16 kern_filter_size,
2771                                 u16 ib_real_filter_sz)
2772 {
2773         /*
2774          * User space filter structures must be 64 bit aligned, otherwise this
2775          * may pass, but we won't handle additional new attributes.
2776          */
2777
2778         if (kern_filter_size > ib_real_filter_sz) {
2779                 if (memchr_inv(kern_spec_filter +
2780                                ib_real_filter_sz, 0,
2781                                kern_filter_size - ib_real_filter_sz))
2782                         return -EINVAL;
2783                 return ib_real_filter_sz;
2784         }
2785         return kern_filter_size;
2786 }
2787
2788 static int kern_spec_to_ib_spec_filter(struct ib_uverbs_flow_spec *kern_spec,
2789                                        union ib_flow_spec *ib_spec)
2790 {
2791         ssize_t actual_filter_sz;
2792         ssize_t kern_filter_sz;
2793         ssize_t ib_filter_sz;
2794         void *kern_spec_mask;
2795         void *kern_spec_val;
2796
2797         if (kern_spec->reserved)
2798                 return -EINVAL;
2799
2800         ib_spec->type = kern_spec->type;
2801
2802         kern_filter_sz = kern_spec_filter_sz(&kern_spec->hdr);
2803         /* User flow spec size must be aligned to 4 bytes */
2804         if (kern_filter_sz != ALIGN(kern_filter_sz, 4))
2805                 return -EINVAL;
2806
2807         kern_spec_val = (void *)kern_spec +
2808                 sizeof(struct ib_uverbs_flow_spec_hdr);
2809         kern_spec_mask = kern_spec_val + kern_filter_sz;
2810         if (ib_spec->type == (IB_FLOW_SPEC_INNER | IB_FLOW_SPEC_VXLAN_TUNNEL))
2811                 return -EINVAL;
2812
2813         switch (ib_spec->type & ~IB_FLOW_SPEC_INNER) {
2814         case IB_FLOW_SPEC_ETH:
2815                 ib_filter_sz = offsetof(struct ib_flow_eth_filter, real_sz);
2816                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2817                                                     kern_filter_sz,
2818                                                     ib_filter_sz);
2819                 if (actual_filter_sz <= 0)
2820                         return -EINVAL;
2821                 ib_spec->size = sizeof(struct ib_flow_spec_eth);
2822                 memcpy(&ib_spec->eth.val, kern_spec_val, actual_filter_sz);
2823                 memcpy(&ib_spec->eth.mask, kern_spec_mask, actual_filter_sz);
2824                 break;
2825         case IB_FLOW_SPEC_IPV4:
2826                 ib_filter_sz = offsetof(struct ib_flow_ipv4_filter, real_sz);
2827                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2828                                                     kern_filter_sz,
2829                                                     ib_filter_sz);
2830                 if (actual_filter_sz <= 0)
2831                         return -EINVAL;
2832                 ib_spec->size = sizeof(struct ib_flow_spec_ipv4);
2833                 memcpy(&ib_spec->ipv4.val, kern_spec_val, actual_filter_sz);
2834                 memcpy(&ib_spec->ipv4.mask, kern_spec_mask, actual_filter_sz);
2835                 break;
2836         case IB_FLOW_SPEC_IPV6:
2837                 ib_filter_sz = offsetof(struct ib_flow_ipv6_filter, real_sz);
2838                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2839                                                     kern_filter_sz,
2840                                                     ib_filter_sz);
2841                 if (actual_filter_sz <= 0)
2842                         return -EINVAL;
2843                 ib_spec->size = sizeof(struct ib_flow_spec_ipv6);
2844                 memcpy(&ib_spec->ipv6.val, kern_spec_val, actual_filter_sz);
2845                 memcpy(&ib_spec->ipv6.mask, kern_spec_mask, actual_filter_sz);
2846
2847                 if ((ntohl(ib_spec->ipv6.mask.flow_label)) >= BIT(20) ||
2848                     (ntohl(ib_spec->ipv6.val.flow_label)) >= BIT(20))
2849                         return -EINVAL;
2850                 break;
2851         case IB_FLOW_SPEC_TCP:
2852         case IB_FLOW_SPEC_UDP:
2853                 ib_filter_sz = offsetof(struct ib_flow_tcp_udp_filter, real_sz);
2854                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2855                                                     kern_filter_sz,
2856                                                     ib_filter_sz);
2857                 if (actual_filter_sz <= 0)
2858                         return -EINVAL;
2859                 ib_spec->size = sizeof(struct ib_flow_spec_tcp_udp);
2860                 memcpy(&ib_spec->tcp_udp.val, kern_spec_val, actual_filter_sz);
2861                 memcpy(&ib_spec->tcp_udp.mask, kern_spec_mask, actual_filter_sz);
2862                 break;
2863         case IB_FLOW_SPEC_VXLAN_TUNNEL:
2864                 ib_filter_sz = offsetof(struct ib_flow_tunnel_filter, real_sz);
2865                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2866                                                     kern_filter_sz,
2867                                                     ib_filter_sz);
2868                 if (actual_filter_sz <= 0)
2869                         return -EINVAL;
2870                 ib_spec->tunnel.size = sizeof(struct ib_flow_spec_tunnel);
2871                 memcpy(&ib_spec->tunnel.val, kern_spec_val, actual_filter_sz);
2872                 memcpy(&ib_spec->tunnel.mask, kern_spec_mask, actual_filter_sz);
2873
2874                 if ((ntohl(ib_spec->tunnel.mask.tunnel_id)) >= BIT(24) ||
2875                     (ntohl(ib_spec->tunnel.val.tunnel_id)) >= BIT(24))
2876                         return -EINVAL;
2877                 break;
2878         default:
2879                 return -EINVAL;
2880         }
2881         return 0;
2882 }
2883
2884 static int kern_spec_to_ib_spec(struct ib_uverbs_flow_spec *kern_spec,
2885                                 union ib_flow_spec *ib_spec)
2886 {
2887         if (kern_spec->reserved)
2888                 return -EINVAL;
2889
2890         if (kern_spec->type >= IB_FLOW_SPEC_ACTION_TAG)
2891                 return kern_spec_to_ib_spec_action(kern_spec, ib_spec);
2892         else
2893                 return kern_spec_to_ib_spec_filter(kern_spec, ib_spec);
2894 }
2895
2896 int ib_uverbs_ex_create_wq(struct ib_uverbs_file *file,
2897                            struct ib_device *ib_dev,
2898                            struct ib_udata *ucore,
2899                            struct ib_udata *uhw)
2900 {
2901         struct ib_uverbs_ex_create_wq     cmd = {};
2902         struct ib_uverbs_ex_create_wq_resp resp = {};
2903         struct ib_uwq_object           *obj;
2904         int err = 0;
2905         struct ib_cq *cq;
2906         struct ib_pd *pd;
2907         struct ib_wq *wq;
2908         struct ib_wq_init_attr wq_init_attr = {};
2909         size_t required_cmd_sz;
2910         size_t required_resp_len;
2911
2912         required_cmd_sz = offsetof(typeof(cmd), max_sge) + sizeof(cmd.max_sge);
2913         required_resp_len = offsetof(typeof(resp), wqn) + sizeof(resp.wqn);
2914
2915         if (ucore->inlen < required_cmd_sz)
2916                 return -EINVAL;
2917
2918         if (ucore->outlen < required_resp_len)
2919                 return -ENOSPC;
2920
2921         if (ucore->inlen > sizeof(cmd) &&
2922             !ib_is_udata_cleared(ucore, sizeof(cmd),
2923                                  ucore->inlen - sizeof(cmd)))
2924                 return -EOPNOTSUPP;
2925
2926         err = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
2927         if (err)
2928                 return err;
2929
2930         if (cmd.comp_mask)
2931                 return -EOPNOTSUPP;
2932
2933         obj  = (struct ib_uwq_object *)uobj_alloc(uobj_get_type(wq),
2934                                                   file->ucontext);
2935         if (IS_ERR(obj))
2936                 return PTR_ERR(obj);
2937
2938         pd  = uobj_get_obj_read(pd, cmd.pd_handle, file->ucontext);
2939         if (!pd) {
2940                 err = -EINVAL;
2941                 goto err_uobj;
2942         }
2943
2944         cq = uobj_get_obj_read(cq, cmd.cq_handle, file->ucontext);
2945         if (!cq) {
2946                 err = -EINVAL;
2947                 goto err_put_pd;
2948         }
2949
2950         wq_init_attr.cq = cq;
2951         wq_init_attr.max_sge = cmd.max_sge;
2952         wq_init_attr.max_wr = cmd.max_wr;
2953         wq_init_attr.wq_context = file;
2954         wq_init_attr.wq_type = cmd.wq_type;
2955         wq_init_attr.event_handler = ib_uverbs_wq_event_handler;
2956         if (ucore->inlen >= (offsetof(typeof(cmd), create_flags) +
2957                              sizeof(cmd.create_flags)))
2958                 wq_init_attr.create_flags = cmd.create_flags;
2959         obj->uevent.events_reported = 0;
2960         INIT_LIST_HEAD(&obj->uevent.event_list);
2961         wq = pd->device->create_wq(pd, &wq_init_attr, uhw);
2962         if (IS_ERR(wq)) {
2963                 err = PTR_ERR(wq);
2964                 goto err_put_cq;
2965         }
2966
2967         wq->uobject = &obj->uevent.uobject;
2968         obj->uevent.uobject.object = wq;
2969         wq->wq_type = wq_init_attr.wq_type;
2970         wq->cq = cq;
2971         wq->pd = pd;
2972         wq->device = pd->device;
2973         wq->wq_context = wq_init_attr.wq_context;
2974         atomic_set(&wq->usecnt, 0);
2975         atomic_inc(&pd->usecnt);
2976         atomic_inc(&cq->usecnt);
2977         wq->uobject = &obj->uevent.uobject;
2978         obj->uevent.uobject.object = wq;
2979
2980         memset(&resp, 0, sizeof(resp));
2981         resp.wq_handle = obj->uevent.uobject.id;
2982         resp.max_sge = wq_init_attr.max_sge;
2983         resp.max_wr = wq_init_attr.max_wr;
2984         resp.wqn = wq->wq_num;
2985         resp.response_length = required_resp_len;
2986         err = ib_copy_to_udata(ucore,
2987                                &resp, resp.response_length);
2988         if (err)
2989                 goto err_copy;
2990
2991         uobj_put_obj_read(pd);
2992         uobj_put_obj_read(cq);
2993         uobj_alloc_commit(&obj->uevent.uobject);
2994         return 0;
2995
2996 err_copy:
2997         ib_destroy_wq(wq);
2998 err_put_cq:
2999         uobj_put_obj_read(cq);
3000 err_put_pd:
3001         uobj_put_obj_read(pd);
3002 err_uobj:
3003         uobj_alloc_abort(&obj->uevent.uobject);
3004
3005         return err;
3006 }
3007
3008 int ib_uverbs_ex_destroy_wq(struct ib_uverbs_file *file,
3009                             struct ib_device *ib_dev,
3010                             struct ib_udata *ucore,
3011                             struct ib_udata *uhw)
3012 {
3013         struct ib_uverbs_ex_destroy_wq  cmd = {};
3014         struct ib_uverbs_ex_destroy_wq_resp     resp = {};
3015         struct ib_wq                    *wq;
3016         struct ib_uobject               *uobj;
3017         struct ib_uwq_object            *obj;
3018         size_t required_cmd_sz;
3019         size_t required_resp_len;
3020         int                             ret;
3021
3022         required_cmd_sz = offsetof(typeof(cmd), wq_handle) + sizeof(cmd.wq_handle);
3023         required_resp_len = offsetof(typeof(resp), reserved) + sizeof(resp.reserved);
3024
3025         if (ucore->inlen < required_cmd_sz)
3026                 return -EINVAL;
3027
3028         if (ucore->outlen < required_resp_len)
3029                 return -ENOSPC;
3030
3031         if (ucore->inlen > sizeof(cmd) &&
3032             !ib_is_udata_cleared(ucore, sizeof(cmd),
3033                                  ucore->inlen - sizeof(cmd)))
3034                 return -EOPNOTSUPP;
3035
3036         ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
3037         if (ret)
3038                 return ret;
3039
3040         if (cmd.comp_mask)
3041                 return -EOPNOTSUPP;
3042
3043         resp.response_length = required_resp_len;
3044         uobj  = uobj_get_write(uobj_get_type(wq), cmd.wq_handle,
3045                                file->ucontext);
3046         if (IS_ERR(uobj))
3047                 return PTR_ERR(uobj);
3048
3049         wq = uobj->object;
3050         obj = container_of(uobj, struct ib_uwq_object, uevent.uobject);
3051         /*
3052          * Make sure we don't free the memory in remove_commit as we still
3053          * needs the uobject memory to create the response.
3054          */
3055         uverbs_uobject_get(uobj);
3056
3057         ret = uobj_remove_commit(uobj);
3058         resp.events_reported = obj->uevent.events_reported;
3059         uverbs_uobject_put(uobj);
3060         if (ret)
3061                 return ret;
3062
3063         return ib_copy_to_udata(ucore, &resp, resp.response_length);
3064 }
3065
3066 int ib_uverbs_ex_modify_wq(struct ib_uverbs_file *file,
3067                            struct ib_device *ib_dev,
3068                            struct ib_udata *ucore,
3069                            struct ib_udata *uhw)
3070 {
3071         struct ib_uverbs_ex_modify_wq cmd = {};
3072         struct ib_wq *wq;
3073         struct ib_wq_attr wq_attr = {};
3074         size_t required_cmd_sz;
3075         int ret;
3076
3077         required_cmd_sz = offsetof(typeof(cmd), curr_wq_state) + sizeof(cmd.curr_wq_state);
3078         if (ucore->inlen < required_cmd_sz)
3079                 return -EINVAL;
3080
3081         if (ucore->inlen > sizeof(cmd) &&
3082             !ib_is_udata_cleared(ucore, sizeof(cmd),
3083                                  ucore->inlen - sizeof(cmd)))
3084                 return -EOPNOTSUPP;
3085
3086         ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
3087         if (ret)
3088                 return ret;
3089
3090         if (!cmd.attr_mask)
3091                 return -EINVAL;
3092
3093         if (cmd.attr_mask > (IB_WQ_STATE | IB_WQ_CUR_STATE | IB_WQ_FLAGS))
3094                 return -EINVAL;
3095
3096         wq = uobj_get_obj_read(wq, cmd.wq_handle, file->ucontext);
3097         if (!wq)
3098                 return -EINVAL;
3099
3100         wq_attr.curr_wq_state = cmd.curr_wq_state;
3101         wq_attr.wq_state = cmd.wq_state;
3102         if (cmd.attr_mask & IB_WQ_FLAGS) {
3103                 wq_attr.flags = cmd.flags;
3104                 wq_attr.flags_mask = cmd.flags_mask;
3105         }
3106         ret = wq->device->modify_wq(wq, &wq_attr, cmd.attr_mask, uhw);
3107         uobj_put_obj_read(wq);
3108         return ret;
3109 }
3110
3111 int ib_uverbs_ex_create_rwq_ind_table(struct ib_uverbs_file *file,
3112                                       struct ib_device *ib_dev,
3113                                       struct ib_udata *ucore,
3114                                       struct ib_udata *uhw)
3115 {
3116         struct ib_uverbs_ex_create_rwq_ind_table          cmd = {};
3117         struct ib_uverbs_ex_create_rwq_ind_table_resp  resp = {};
3118         struct ib_uobject                 *uobj;
3119         int err = 0;
3120         struct ib_rwq_ind_table_init_attr init_attr = {};
3121         struct ib_rwq_ind_table *rwq_ind_tbl;
3122         struct ib_wq    **wqs = NULL;
3123         u32 *wqs_handles = NULL;
3124         struct ib_wq    *wq = NULL;
3125         int i, j, num_read_wqs;
3126         u32 num_wq_handles;
3127         u32 expected_in_size;
3128         size_t required_cmd_sz_header;
3129         size_t required_resp_len;
3130
3131         required_cmd_sz_header = offsetof(typeof(cmd), log_ind_tbl_size) + sizeof(cmd.log_ind_tbl_size);
3132         required_resp_len = offsetof(typeof(resp), ind_tbl_num) + sizeof(resp.ind_tbl_num);
3133
3134         if (ucore->inlen < required_cmd_sz_header)
3135                 return -EINVAL;
3136
3137         if (ucore->outlen < required_resp_len)
3138                 return -ENOSPC;
3139
3140         err = ib_copy_from_udata(&cmd, ucore, required_cmd_sz_header);
3141         if (err)
3142                 return err;
3143
3144         ucore->inbuf += required_cmd_sz_header;
3145         ucore->inlen -= required_cmd_sz_header;
3146
3147         if (cmd.comp_mask)
3148                 return -EOPNOTSUPP;
3149
3150         if (cmd.log_ind_tbl_size > IB_USER_VERBS_MAX_LOG_IND_TBL_SIZE)
3151                 return -EINVAL;
3152
3153         num_wq_handles = 1 << cmd.log_ind_tbl_size;
3154         expected_in_size = num_wq_handles * sizeof(__u32);
3155         if (num_wq_handles == 1)
3156                 /* input size for wq handles is u64 aligned */
3157                 expected_in_size += sizeof(__u32);
3158
3159         if (ucore->inlen < expected_in_size)
3160                 return -EINVAL;
3161
3162         if (ucore->inlen > expected_in_size &&
3163             !ib_is_udata_cleared(ucore, expected_in_size,
3164                                  ucore->inlen - expected_in_size))
3165                 return -EOPNOTSUPP;
3166
3167         wqs_handles = kcalloc(num_wq_handles, sizeof(*wqs_handles),
3168                               GFP_KERNEL);
3169         if (!wqs_handles)
3170                 return -ENOMEM;
3171
3172         err = ib_copy_from_udata(wqs_handles, ucore,
3173                                  num_wq_handles * sizeof(__u32));
3174         if (err)
3175                 goto err_free;
3176
3177         wqs = kcalloc(num_wq_handles, sizeof(*wqs), GFP_KERNEL);
3178         if (!wqs) {
3179                 err = -ENOMEM;
3180                 goto  err_free;
3181         }
3182
3183         for (num_read_wqs = 0; num_read_wqs < num_wq_handles;
3184                         num_read_wqs++) {
3185                 wq = uobj_get_obj_read(wq, wqs_handles[num_read_wqs],
3186                                        file->ucontext);
3187                 if (!wq) {
3188                         err = -EINVAL;
3189                         goto put_wqs;
3190                 }
3191
3192                 wqs[num_read_wqs] = wq;
3193         }
3194
3195         uobj  = uobj_alloc(uobj_get_type(rwq_ind_table), file->ucontext);
3196         if (IS_ERR(uobj)) {
3197                 err = PTR_ERR(uobj);
3198                 goto put_wqs;
3199         }
3200
3201         init_attr.log_ind_tbl_size = cmd.log_ind_tbl_size;
3202         init_attr.ind_tbl = wqs;
3203         rwq_ind_tbl = ib_dev->create_rwq_ind_table(ib_dev, &init_attr, uhw);
3204
3205         if (IS_ERR(rwq_ind_tbl)) {
3206                 err = PTR_ERR(rwq_ind_tbl);
3207                 goto err_uobj;
3208         }
3209
3210         rwq_ind_tbl->ind_tbl = wqs;
3211         rwq_ind_tbl->log_ind_tbl_size = init_attr.log_ind_tbl_size;
3212         rwq_ind_tbl->uobject = uobj;
3213         uobj->object = rwq_ind_tbl;
3214         rwq_ind_tbl->device = ib_dev;
3215         atomic_set(&rwq_ind_tbl->usecnt, 0);
3216
3217         for (i = 0; i < num_wq_handles; i++)
3218                 atomic_inc(&wqs[i]->usecnt);
3219
3220         resp.ind_tbl_handle = uobj->id;
3221         resp.ind_tbl_num = rwq_ind_tbl->ind_tbl_num;
3222         resp.response_length = required_resp_len;
3223
3224         err = ib_copy_to_udata(ucore,
3225                                &resp, resp.response_length);
3226         if (err)
3227                 goto err_copy;
3228
3229         kfree(wqs_handles);
3230
3231         for (j = 0; j < num_read_wqs; j++)
3232                 uobj_put_obj_read(wqs[j]);
3233
3234         uobj_alloc_commit(uobj);
3235         return 0;
3236
3237 err_copy:
3238         ib_destroy_rwq_ind_table(rwq_ind_tbl);
3239 err_uobj:
3240         uobj_alloc_abort(uobj);
3241 put_wqs:
3242         for (j = 0; j < num_read_wqs; j++)
3243                 uobj_put_obj_read(wqs[j]);
3244 err_free:
3245         kfree(wqs_handles);
3246         kfree(wqs);
3247         return err;
3248 }
3249
3250 int ib_uverbs_ex_destroy_rwq_ind_table(struct ib_uverbs_file *file,
3251                                        struct ib_device *ib_dev,
3252                                        struct ib_udata *ucore,
3253                                        struct ib_udata *uhw)
3254 {
3255         struct ib_uverbs_ex_destroy_rwq_ind_table       cmd = {};
3256         struct ib_uobject               *uobj;
3257         int                     ret;
3258         size_t required_cmd_sz;
3259
3260         required_cmd_sz = offsetof(typeof(cmd), ind_tbl_handle) + sizeof(cmd.ind_tbl_handle);
3261
3262         if (ucore->inlen < required_cmd_sz)
3263                 return -EINVAL;
3264
3265         if (ucore->inlen > sizeof(cmd) &&
3266             !ib_is_udata_cleared(ucore, sizeof(cmd),
3267                                  ucore->inlen - sizeof(cmd)))
3268                 return -EOPNOTSUPP;
3269
3270         ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
3271         if (ret)
3272                 return ret;
3273
3274         if (cmd.comp_mask)
3275                 return -EOPNOTSUPP;
3276
3277         uobj  = uobj_get_write(uobj_get_type(rwq_ind_table), cmd.ind_tbl_handle,
3278                                file->ucontext);
3279         if (IS_ERR(uobj))
3280                 return PTR_ERR(uobj);
3281
3282         return uobj_remove_commit(uobj);
3283 }
3284
3285 int ib_uverbs_ex_create_flow(struct ib_uverbs_file *file,
3286                              struct ib_device *ib_dev,
3287                              struct ib_udata *ucore,
3288                              struct ib_udata *uhw)
3289 {
3290         struct ib_uverbs_create_flow      cmd;
3291         struct ib_uverbs_create_flow_resp resp;
3292         struct ib_uobject                 *uobj;
3293         struct ib_flow                    *flow_id;
3294         struct ib_uverbs_flow_attr        *kern_flow_attr;
3295         struct ib_flow_attr               *flow_attr;
3296         struct ib_qp                      *qp;
3297         int err = 0;
3298         void *kern_spec;
3299         void *ib_spec;
3300         int i;
3301
3302         if (ucore->inlen < sizeof(cmd))
3303                 return -EINVAL;
3304
3305         if (ucore->outlen < sizeof(resp))
3306                 return -ENOSPC;
3307
3308         err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3309         if (err)
3310                 return err;
3311
3312         ucore->inbuf += sizeof(cmd);
3313         ucore->inlen -= sizeof(cmd);
3314
3315         if (cmd.comp_mask)
3316                 return -EINVAL;
3317
3318         if (!capable(CAP_NET_RAW))
3319                 return -EPERM;
3320
3321         if (cmd.flow_attr.flags >= IB_FLOW_ATTR_FLAGS_RESERVED)
3322                 return -EINVAL;
3323
3324         if ((cmd.flow_attr.flags & IB_FLOW_ATTR_FLAGS_DONT_TRAP) &&
3325             ((cmd.flow_attr.type == IB_FLOW_ATTR_ALL_DEFAULT) ||
3326              (cmd.flow_attr.type == IB_FLOW_ATTR_MC_DEFAULT)))
3327                 return -EINVAL;
3328
3329         if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS)
3330                 return -EINVAL;
3331
3332         if (cmd.flow_attr.size > ucore->inlen ||
3333             cmd.flow_attr.size >
3334             (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec)))
3335                 return -EINVAL;
3336
3337         if (cmd.flow_attr.reserved[0] ||
3338             cmd.flow_attr.reserved[1])
3339                 return -EINVAL;
3340
3341         if (cmd.flow_attr.num_of_specs) {
3342                 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size,
3343                                          GFP_KERNEL);
3344                 if (!kern_flow_attr)
3345                         return -ENOMEM;
3346
3347                 memcpy(kern_flow_attr, &cmd.flow_attr, sizeof(*kern_flow_attr));
3348                 err = ib_copy_from_udata(kern_flow_attr + 1, ucore,
3349                                          cmd.flow_attr.size);
3350                 if (err)
3351                         goto err_free_attr;
3352         } else {
3353                 kern_flow_attr = &cmd.flow_attr;
3354         }
3355
3356         uobj  = uobj_alloc(uobj_get_type(flow), file->ucontext);
3357         if (IS_ERR(uobj)) {
3358                 err = PTR_ERR(uobj);
3359                 goto err_free_attr;
3360         }
3361
3362         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
3363         if (!qp) {
3364                 err = -EINVAL;
3365                 goto err_uobj;
3366         }
3367
3368         flow_attr = kzalloc(sizeof(*flow_attr) + cmd.flow_attr.num_of_specs *
3369                             sizeof(union ib_flow_spec), GFP_KERNEL);
3370         if (!flow_attr) {
3371                 err = -ENOMEM;
3372                 goto err_put;
3373         }
3374
3375         flow_attr->type = kern_flow_attr->type;
3376         flow_attr->priority = kern_flow_attr->priority;
3377         flow_attr->num_of_specs = kern_flow_attr->num_of_specs;
3378         flow_attr->port = kern_flow_attr->port;
3379         flow_attr->flags = kern_flow_attr->flags;
3380         flow_attr->size = sizeof(*flow_attr);
3381
3382         kern_spec = kern_flow_attr + 1;
3383         ib_spec = flow_attr + 1;
3384         for (i = 0; i < flow_attr->num_of_specs &&
3385              cmd.flow_attr.size > offsetof(struct ib_uverbs_flow_spec, reserved) &&
3386              cmd.flow_attr.size >=
3387              ((struct ib_uverbs_flow_spec *)kern_spec)->size; i++) {
3388                 err = kern_spec_to_ib_spec(kern_spec, ib_spec);
3389                 if (err)
3390                         goto err_free;
3391                 flow_attr->size +=
3392                         ((union ib_flow_spec *) ib_spec)->size;
3393                 cmd.flow_attr.size -= ((struct ib_uverbs_flow_spec *)kern_spec)->size;
3394                 kern_spec += ((struct ib_uverbs_flow_spec *) kern_spec)->size;
3395                 ib_spec += ((union ib_flow_spec *) ib_spec)->size;
3396         }
3397         if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) {
3398                 pr_warn("create flow failed, flow %d: %d bytes left from uverb cmd\n",
3399                         i, cmd.flow_attr.size);
3400                 err = -EINVAL;
3401                 goto err_free;
3402         }
3403         flow_id = ib_create_flow(qp, flow_attr, IB_FLOW_DOMAIN_USER);
3404         if (IS_ERR(flow_id)) {
3405                 err = PTR_ERR(flow_id);
3406                 goto err_free;
3407         }
3408         flow_id->uobject = uobj;
3409         uobj->object = flow_id;
3410
3411         memset(&resp, 0, sizeof(resp));
3412         resp.flow_handle = uobj->id;
3413
3414         err = ib_copy_to_udata(ucore,
3415                                &resp, sizeof(resp));
3416         if (err)
3417                 goto err_copy;
3418
3419         uobj_put_obj_read(qp);
3420         uobj_alloc_commit(uobj);
3421         kfree(flow_attr);
3422         if (cmd.flow_attr.num_of_specs)
3423                 kfree(kern_flow_attr);
3424         return 0;
3425 err_copy:
3426         ib_destroy_flow(flow_id);
3427 err_free:
3428         kfree(flow_attr);
3429 err_put:
3430         uobj_put_obj_read(qp);
3431 err_uobj:
3432         uobj_alloc_abort(uobj);
3433 err_free_attr:
3434         if (cmd.flow_attr.num_of_specs)
3435                 kfree(kern_flow_attr);
3436         return err;
3437 }
3438
3439 int ib_uverbs_ex_destroy_flow(struct ib_uverbs_file *file,
3440                               struct ib_device *ib_dev,
3441                               struct ib_udata *ucore,
3442                               struct ib_udata *uhw)
3443 {
3444         struct ib_uverbs_destroy_flow   cmd;
3445         struct ib_uobject               *uobj;
3446         int                             ret;
3447
3448         if (ucore->inlen < sizeof(cmd))
3449                 return -EINVAL;
3450
3451         ret = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3452         if (ret)
3453                 return ret;
3454
3455         if (cmd.comp_mask)
3456                 return -EINVAL;
3457
3458         uobj  = uobj_get_write(uobj_get_type(flow), cmd.flow_handle,
3459                                file->ucontext);
3460         if (IS_ERR(uobj))
3461                 return PTR_ERR(uobj);
3462
3463         ret = uobj_remove_commit(uobj);
3464         return ret;
3465 }
3466
3467 static int __uverbs_create_xsrq(struct ib_uverbs_file *file,
3468                                 struct ib_device *ib_dev,
3469                                 struct ib_uverbs_create_xsrq *cmd,
3470                                 struct ib_udata *udata)
3471 {
3472         struct ib_uverbs_create_srq_resp resp;
3473         struct ib_usrq_object           *obj;
3474         struct ib_pd                    *pd;
3475         struct ib_srq                   *srq;
3476         struct ib_uobject               *uninitialized_var(xrcd_uobj);
3477         struct ib_srq_init_attr          attr;
3478         int ret;
3479
3480         obj  = (struct ib_usrq_object *)uobj_alloc(uobj_get_type(srq),
3481                                                    file->ucontext);
3482         if (IS_ERR(obj))
3483                 return PTR_ERR(obj);
3484
3485         if (cmd->srq_type == IB_SRQT_XRC) {
3486                 xrcd_uobj = uobj_get_read(uobj_get_type(xrcd), cmd->xrcd_handle,
3487                                           file->ucontext);
3488                 if (IS_ERR(xrcd_uobj)) {
3489                         ret = -EINVAL;
3490                         goto err;
3491                 }
3492
3493                 attr.ext.xrc.xrcd = (struct ib_xrcd *)xrcd_uobj->object;
3494                 if (!attr.ext.xrc.xrcd) {
3495                         ret = -EINVAL;
3496                         goto err_put_xrcd;
3497                 }
3498
3499                 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
3500                 atomic_inc(&obj->uxrcd->refcnt);
3501
3502                 attr.ext.xrc.cq  = uobj_get_obj_read(cq, cmd->cq_handle,
3503                                                      file->ucontext);
3504                 if (!attr.ext.xrc.cq) {
3505                         ret = -EINVAL;
3506                         goto err_put_xrcd;
3507                 }
3508         }
3509
3510         pd  = uobj_get_obj_read(pd, cmd->pd_handle, file->ucontext);
3511         if (!pd) {
3512                 ret = -EINVAL;
3513                 goto err_put_cq;
3514         }
3515
3516         attr.event_handler  = ib_uverbs_srq_event_handler;
3517         attr.srq_context    = file;
3518         attr.srq_type       = cmd->srq_type;
3519         attr.attr.max_wr    = cmd->max_wr;
3520         attr.attr.max_sge   = cmd->max_sge;
3521         attr.attr.srq_limit = cmd->srq_limit;
3522
3523         obj->uevent.events_reported = 0;
3524         INIT_LIST_HEAD(&obj->uevent.event_list);
3525
3526         srq = pd->device->create_srq(pd, &attr, udata);
3527         if (IS_ERR(srq)) {
3528                 ret = PTR_ERR(srq);
3529                 goto err_put;
3530         }
3531
3532         srq->device        = pd->device;
3533         srq->pd            = pd;
3534         srq->srq_type      = cmd->srq_type;
3535         srq->uobject       = &obj->uevent.uobject;
3536         srq->event_handler = attr.event_handler;
3537         srq->srq_context   = attr.srq_context;
3538
3539         if (cmd->srq_type == IB_SRQT_XRC) {
3540                 srq->ext.xrc.cq   = attr.ext.xrc.cq;
3541                 srq->ext.xrc.xrcd = attr.ext.xrc.xrcd;
3542                 atomic_inc(&attr.ext.xrc.cq->usecnt);
3543                 atomic_inc(&attr.ext.xrc.xrcd->usecnt);
3544         }
3545
3546         atomic_inc(&pd->usecnt);
3547         atomic_set(&srq->usecnt, 0);
3548
3549         obj->uevent.uobject.object = srq;
3550         obj->uevent.uobject.user_handle = cmd->user_handle;
3551
3552         memset(&resp, 0, sizeof resp);
3553         resp.srq_handle = obj->uevent.uobject.id;
3554         resp.max_wr     = attr.attr.max_wr;
3555         resp.max_sge    = attr.attr.max_sge;
3556         if (cmd->srq_type == IB_SRQT_XRC)
3557                 resp.srqn = srq->ext.xrc.srq_num;
3558
3559         if (copy_to_user((void __user *) (unsigned long) cmd->response,
3560                          &resp, sizeof resp)) {
3561                 ret = -EFAULT;
3562                 goto err_copy;
3563         }
3564
3565         if (cmd->srq_type == IB_SRQT_XRC) {
3566                 uobj_put_read(xrcd_uobj);
3567                 uobj_put_obj_read(attr.ext.xrc.cq);
3568         }
3569         uobj_put_obj_read(pd);
3570         uobj_alloc_commit(&obj->uevent.uobject);
3571
3572         return 0;
3573
3574 err_copy:
3575         ib_destroy_srq(srq);
3576
3577 err_put:
3578         uobj_put_obj_read(pd);
3579
3580 err_put_cq:
3581         if (cmd->srq_type == IB_SRQT_XRC)
3582                 uobj_put_obj_read(attr.ext.xrc.cq);
3583
3584 err_put_xrcd:
3585         if (cmd->srq_type == IB_SRQT_XRC) {
3586                 atomic_dec(&obj->uxrcd->refcnt);
3587                 uobj_put_read(xrcd_uobj);
3588         }
3589
3590 err:
3591         uobj_alloc_abort(&obj->uevent.uobject);
3592         return ret;
3593 }
3594
3595 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
3596                              struct ib_device *ib_dev,
3597                              const char __user *buf, int in_len,
3598                              int out_len)
3599 {
3600         struct ib_uverbs_create_srq      cmd;
3601         struct ib_uverbs_create_xsrq     xcmd;
3602         struct ib_uverbs_create_srq_resp resp;
3603         struct ib_udata                  udata;
3604         int ret;
3605
3606         if (out_len < sizeof resp)
3607                 return -ENOSPC;
3608
3609         if (copy_from_user(&cmd, buf, sizeof cmd))
3610                 return -EFAULT;
3611
3612         xcmd.response    = cmd.response;
3613         xcmd.user_handle = cmd.user_handle;
3614         xcmd.srq_type    = IB_SRQT_BASIC;
3615         xcmd.pd_handle   = cmd.pd_handle;
3616         xcmd.max_wr      = cmd.max_wr;
3617         xcmd.max_sge     = cmd.max_sge;
3618         xcmd.srq_limit   = cmd.srq_limit;
3619
3620         INIT_UDATA(&udata, buf + sizeof cmd,
3621                    (unsigned long) cmd.response + sizeof resp,
3622                    in_len - sizeof cmd - sizeof(struct ib_uverbs_cmd_hdr),
3623                    out_len - sizeof resp);
3624
3625         ret = __uverbs_create_xsrq(file, ib_dev, &xcmd, &udata);
3626         if (ret)
3627                 return ret;
3628
3629         return in_len;
3630 }
3631
3632 ssize_t ib_uverbs_create_xsrq(struct ib_uverbs_file *file,
3633                               struct ib_device *ib_dev,
3634                               const char __user *buf, int in_len, int out_len)
3635 {
3636         struct ib_uverbs_create_xsrq     cmd;
3637         struct ib_uverbs_create_srq_resp resp;
3638         struct ib_udata                  udata;
3639         int ret;
3640
3641         if (out_len < sizeof resp)
3642                 return -ENOSPC;
3643
3644         if (copy_from_user(&cmd, buf, sizeof cmd))
3645                 return -EFAULT;
3646
3647         INIT_UDATA(&udata, buf + sizeof cmd,
3648                    (unsigned long) cmd.response + sizeof resp,
3649                    in_len - sizeof cmd - sizeof(struct ib_uverbs_cmd_hdr),
3650                    out_len - sizeof resp);
3651
3652         ret = __uverbs_create_xsrq(file, ib_dev, &cmd, &udata);
3653         if (ret)
3654                 return ret;
3655
3656         return in_len;
3657 }
3658
3659 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
3660                              struct ib_device *ib_dev,
3661                              const char __user *buf, int in_len,
3662                              int out_len)
3663 {
3664         struct ib_uverbs_modify_srq cmd;
3665         struct ib_udata             udata;
3666         struct ib_srq              *srq;
3667         struct ib_srq_attr          attr;
3668         int                         ret;
3669
3670         if (copy_from_user(&cmd, buf, sizeof cmd))
3671                 return -EFAULT;
3672
3673         INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
3674                    out_len);
3675
3676         srq = uobj_get_obj_read(srq, cmd.srq_handle, file->ucontext);
3677         if (!srq)
3678                 return -EINVAL;
3679
3680         attr.max_wr    = cmd.max_wr;
3681         attr.srq_limit = cmd.srq_limit;
3682
3683         ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata);
3684
3685         uobj_put_obj_read(srq);
3686
3687         return ret ? ret : in_len;
3688 }
3689
3690 ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
3691                             struct ib_device *ib_dev,
3692                             const char __user *buf,
3693                             int in_len, int out_len)
3694 {
3695         struct ib_uverbs_query_srq      cmd;
3696         struct ib_uverbs_query_srq_resp resp;
3697         struct ib_srq_attr              attr;
3698         struct ib_srq                   *srq;
3699         int                             ret;
3700
3701         if (out_len < sizeof resp)
3702                 return -ENOSPC;
3703
3704         if (copy_from_user(&cmd, buf, sizeof cmd))
3705                 return -EFAULT;
3706
3707         srq = uobj_get_obj_read(srq, cmd.srq_handle, file->ucontext);
3708         if (!srq)
3709                 return -EINVAL;
3710
3711         ret = ib_query_srq(srq, &attr);
3712
3713         uobj_put_obj_read(srq);
3714
3715         if (ret)
3716                 return ret;
3717
3718         memset(&resp, 0, sizeof resp);
3719
3720         resp.max_wr    = attr.max_wr;
3721         resp.max_sge   = attr.max_sge;
3722         resp.srq_limit = attr.srq_limit;
3723
3724         if (copy_to_user((void __user *) (unsigned long) cmd.response,
3725                          &resp, sizeof resp))
3726                 return -EFAULT;
3727
3728         return in_len;
3729 }
3730
3731 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
3732                               struct ib_device *ib_dev,
3733                               const char __user *buf, int in_len,
3734                               int out_len)
3735 {
3736         struct ib_uverbs_destroy_srq      cmd;
3737         struct ib_uverbs_destroy_srq_resp resp;
3738         struct ib_uobject                *uobj;
3739         struct ib_srq                    *srq;
3740         struct ib_uevent_object          *obj;
3741         int                               ret = -EINVAL;
3742         enum ib_srq_type                  srq_type;
3743
3744         if (copy_from_user(&cmd, buf, sizeof cmd))
3745                 return -EFAULT;
3746
3747         uobj  = uobj_get_write(uobj_get_type(srq), cmd.srq_handle,
3748                                file->ucontext);
3749         if (IS_ERR(uobj))
3750                 return PTR_ERR(uobj);
3751
3752         srq = uobj->object;
3753         obj = container_of(uobj, struct ib_uevent_object, uobject);
3754         srq_type = srq->srq_type;
3755         /*
3756          * Make sure we don't free the memory in remove_commit as we still
3757          * needs the uobject memory to create the response.
3758          */
3759         uverbs_uobject_get(uobj);
3760
3761         memset(&resp, 0, sizeof(resp));
3762
3763         ret = uobj_remove_commit(uobj);
3764         if (ret) {
3765                 uverbs_uobject_put(uobj);
3766                 return ret;
3767         }
3768         resp.events_reported = obj->events_reported;
3769         uverbs_uobject_put(uobj);
3770         if (copy_to_user((void __user *)(unsigned long)cmd.response,
3771                          &resp, sizeof(resp)))
3772                 return -EFAULT;
3773
3774         return in_len;
3775 }
3776
3777 int ib_uverbs_ex_query_device(struct ib_uverbs_file *file,
3778                               struct ib_device *ib_dev,
3779                               struct ib_udata *ucore,
3780                               struct ib_udata *uhw)
3781 {
3782         struct ib_uverbs_ex_query_device_resp resp = { {0} };
3783         struct ib_uverbs_ex_query_device  cmd;
3784         struct ib_device_attr attr = {0};
3785         int err;
3786
3787         if (ucore->inlen < sizeof(cmd))
3788                 return -EINVAL;
3789
3790         err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3791         if (err)
3792                 return err;
3793
3794         if (cmd.comp_mask)
3795                 return -EINVAL;
3796
3797         if (cmd.reserved)
3798                 return -EINVAL;
3799
3800         resp.response_length = offsetof(typeof(resp), odp_caps);
3801
3802         if (ucore->outlen < resp.response_length)
3803                 return -ENOSPC;
3804
3805         err = ib_dev->query_device(ib_dev, &attr, uhw);
3806         if (err)
3807                 return err;
3808
3809         copy_query_dev_fields(file, ib_dev, &resp.base, &attr);
3810
3811         if (ucore->outlen < resp.response_length + sizeof(resp.odp_caps))
3812                 goto end;
3813
3814 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
3815         resp.odp_caps.general_caps = attr.odp_caps.general_caps;
3816         resp.odp_caps.per_transport_caps.rc_odp_caps =
3817                 attr.odp_caps.per_transport_caps.rc_odp_caps;
3818         resp.odp_caps.per_transport_caps.uc_odp_caps =
3819                 attr.odp_caps.per_transport_caps.uc_odp_caps;
3820         resp.odp_caps.per_transport_caps.ud_odp_caps =
3821                 attr.odp_caps.per_transport_caps.ud_odp_caps;
3822 #endif
3823         resp.response_length += sizeof(resp.odp_caps);
3824
3825         if (ucore->outlen < resp.response_length + sizeof(resp.timestamp_mask))
3826                 goto end;
3827
3828         resp.timestamp_mask = attr.timestamp_mask;
3829         resp.response_length += sizeof(resp.timestamp_mask);
3830
3831         if (ucore->outlen < resp.response_length + sizeof(resp.hca_core_clock))
3832                 goto end;
3833
3834         resp.hca_core_clock = attr.hca_core_clock;
3835         resp.response_length += sizeof(resp.hca_core_clock);
3836
3837         if (ucore->outlen < resp.response_length + sizeof(resp.device_cap_flags_ex))
3838                 goto end;
3839
3840         resp.device_cap_flags_ex = attr.device_cap_flags;
3841         resp.response_length += sizeof(resp.device_cap_flags_ex);
3842
3843         if (ucore->outlen < resp.response_length + sizeof(resp.rss_caps))
3844                 goto end;
3845
3846         resp.rss_caps.supported_qpts = attr.rss_caps.supported_qpts;
3847         resp.rss_caps.max_rwq_indirection_tables =
3848                 attr.rss_caps.max_rwq_indirection_tables;
3849         resp.rss_caps.max_rwq_indirection_table_size =
3850                 attr.rss_caps.max_rwq_indirection_table_size;
3851
3852         resp.response_length += sizeof(resp.rss_caps);
3853
3854         if (ucore->outlen < resp.response_length + sizeof(resp.max_wq_type_rq))
3855                 goto end;
3856
3857         resp.max_wq_type_rq = attr.max_wq_type_rq;
3858         resp.response_length += sizeof(resp.max_wq_type_rq);
3859
3860         if (ucore->outlen < resp.response_length + sizeof(resp.raw_packet_caps))
3861                 goto end;
3862
3863         resp.raw_packet_caps = attr.raw_packet_caps;
3864         resp.response_length += sizeof(resp.raw_packet_caps);
3865 end:
3866         err = ib_copy_to_udata(ucore, &resp, resp.response_length);
3867         return err;
3868 }