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         attr->qp_state            = cmd->base.qp_state;
1935         attr->cur_qp_state        = cmd->base.cur_qp_state;
1936         attr->path_mtu            = cmd->base.path_mtu;
1937         attr->path_mig_state      = cmd->base.path_mig_state;
1938         attr->qkey                = cmd->base.qkey;
1939         attr->rq_psn              = cmd->base.rq_psn;
1940         attr->sq_psn              = cmd->base.sq_psn;
1941         attr->dest_qp_num         = cmd->base.dest_qp_num;
1942         attr->qp_access_flags     = cmd->base.qp_access_flags;
1943         attr->pkey_index          = cmd->base.pkey_index;
1944         attr->alt_pkey_index      = cmd->base.alt_pkey_index;
1945         attr->en_sqd_async_notify = cmd->base.en_sqd_async_notify;
1946         attr->max_rd_atomic       = cmd->base.max_rd_atomic;
1947         attr->max_dest_rd_atomic  = cmd->base.max_dest_rd_atomic;
1948         attr->min_rnr_timer       = cmd->base.min_rnr_timer;
1949         attr->port_num            = cmd->base.port_num;
1950         attr->timeout             = cmd->base.timeout;
1951         attr->retry_cnt           = cmd->base.retry_cnt;
1952         attr->rnr_retry           = cmd->base.rnr_retry;
1953         attr->alt_port_num        = cmd->base.alt_port_num;
1954         attr->alt_timeout         = cmd->base.alt_timeout;
1955         attr->rate_limit          = cmd->rate_limit;
1956
1957         if (cmd->base.dest.is_global) {
1958                 rdma_ah_set_grh(&attr->ah_attr, NULL,
1959                                 cmd->base.dest.flow_label,
1960                                 cmd->base.dest.sgid_index,
1961                                 cmd->base.dest.hop_limit,
1962                                 cmd->base.dest.traffic_class);
1963                 rdma_ah_set_dgid_raw(&attr->ah_attr, cmd->base.dest.dgid);
1964         } else {
1965                 rdma_ah_set_ah_flags(&attr->ah_attr, 0);
1966         }
1967         rdma_ah_set_dlid(&attr->ah_attr, cmd->base.dest.dlid);
1968         rdma_ah_set_sl(&attr->ah_attr, cmd->base.dest.sl);
1969         rdma_ah_set_path_bits(&attr->ah_attr, cmd->base.dest.src_path_bits);
1970         rdma_ah_set_static_rate(&attr->ah_attr, cmd->base.dest.static_rate);
1971         rdma_ah_set_port_num(&attr->ah_attr,
1972                              cmd->base.dest.port_num);
1973
1974         if (cmd->base.alt_dest.is_global) {
1975                 rdma_ah_set_grh(&attr->alt_ah_attr, NULL,
1976                                 cmd->base.alt_dest.flow_label,
1977                                 cmd->base.alt_dest.sgid_index,
1978                                 cmd->base.alt_dest.hop_limit,
1979                                 cmd->base.alt_dest.traffic_class);
1980                 rdma_ah_set_dgid_raw(&attr->alt_ah_attr,
1981                                      cmd->base.alt_dest.dgid);
1982         } else {
1983                 rdma_ah_set_ah_flags(&attr->alt_ah_attr, 0);
1984         }
1985
1986         rdma_ah_set_dlid(&attr->alt_ah_attr, cmd->base.alt_dest.dlid);
1987         rdma_ah_set_sl(&attr->alt_ah_attr, cmd->base.alt_dest.sl);
1988         rdma_ah_set_path_bits(&attr->alt_ah_attr,
1989                               cmd->base.alt_dest.src_path_bits);
1990         rdma_ah_set_static_rate(&attr->alt_ah_attr,
1991                                 cmd->base.alt_dest.static_rate);
1992         rdma_ah_set_port_num(&attr->alt_ah_attr,
1993                              cmd->base.alt_dest.port_num);
1994
1995         if (qp->real_qp == qp) {
1996                 if (cmd->base.attr_mask & IB_QP_AV) {
1997                         ret = ib_resolve_eth_dmac(qp->device, &attr->ah_attr);
1998                         if (ret)
1999                                 goto release_qp;
2000                 }
2001                 ret = qp->device->modify_qp(qp, attr,
2002                                             modify_qp_mask(qp->qp_type,
2003                                                            cmd->base.attr_mask),
2004                                             udata);
2005         } else {
2006                 ret = ib_modify_qp(qp, attr,
2007                                    modify_qp_mask(qp->qp_type,
2008                                                   cmd->base.attr_mask));
2009         }
2010
2011 release_qp:
2012         uobj_put_obj_read(qp);
2013
2014 out:
2015         kfree(attr);
2016
2017         return ret;
2018 }
2019
2020 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
2021                             struct ib_device *ib_dev,
2022                             const char __user *buf, int in_len,
2023                             int out_len)
2024 {
2025         struct ib_uverbs_ex_modify_qp cmd = {};
2026         struct ib_udata udata;
2027         int ret;
2028
2029         if (copy_from_user(&cmd.base, buf, sizeof(cmd.base)))
2030                 return -EFAULT;
2031
2032         if (cmd.base.attr_mask &
2033             ~((IB_USER_LEGACY_LAST_QP_ATTR_MASK << 1) - 1))
2034                 return -EOPNOTSUPP;
2035
2036         INIT_UDATA(&udata, buf + sizeof(cmd.base), NULL,
2037                    in_len - sizeof(cmd.base), out_len);
2038
2039         ret = modify_qp(file, &cmd, &udata);
2040         if (ret)
2041                 return ret;
2042
2043         return in_len;
2044 }
2045
2046 int ib_uverbs_ex_modify_qp(struct ib_uverbs_file *file,
2047                            struct ib_device *ib_dev,
2048                            struct ib_udata *ucore,
2049                            struct ib_udata *uhw)
2050 {
2051         struct ib_uverbs_ex_modify_qp cmd = {};
2052         int ret;
2053
2054         /*
2055          * Last bit is reserved for extending the attr_mask by
2056          * using another field.
2057          */
2058         BUILD_BUG_ON(IB_USER_LAST_QP_ATTR_MASK == (1 << 31));
2059
2060         if (ucore->inlen < sizeof(cmd.base))
2061                 return -EINVAL;
2062
2063         ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
2064         if (ret)
2065                 return ret;
2066
2067         if (cmd.base.attr_mask &
2068             ~((IB_USER_LAST_QP_ATTR_MASK << 1) - 1))
2069                 return -EOPNOTSUPP;
2070
2071         if (ucore->inlen > sizeof(cmd)) {
2072                 if (ib_is_udata_cleared(ucore, sizeof(cmd),
2073                                         ucore->inlen - sizeof(cmd)))
2074                         return -EOPNOTSUPP;
2075         }
2076
2077         ret = modify_qp(file, &cmd, uhw);
2078
2079         return ret;
2080 }
2081
2082 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
2083                              struct ib_device *ib_dev,
2084                              const char __user *buf, int in_len,
2085                              int out_len)
2086 {
2087         struct ib_uverbs_destroy_qp      cmd;
2088         struct ib_uverbs_destroy_qp_resp resp;
2089         struct ib_uobject               *uobj;
2090         struct ib_qp                    *qp;
2091         struct ib_uqp_object            *obj;
2092         int                              ret = -EINVAL;
2093
2094         if (copy_from_user(&cmd, buf, sizeof cmd))
2095                 return -EFAULT;
2096
2097         memset(&resp, 0, sizeof resp);
2098
2099         uobj  = uobj_get_write(uobj_get_type(qp), cmd.qp_handle,
2100                                file->ucontext);
2101         if (IS_ERR(uobj))
2102                 return PTR_ERR(uobj);
2103
2104         qp  = uobj->object;
2105         obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
2106         /*
2107          * Make sure we don't free the memory in remove_commit as we still
2108          * needs the uobject memory to create the response.
2109          */
2110         uverbs_uobject_get(uobj);
2111
2112         ret = uobj_remove_commit(uobj);
2113         if (ret) {
2114                 uverbs_uobject_put(uobj);
2115                 return ret;
2116         }
2117
2118         resp.events_reported = obj->uevent.events_reported;
2119         uverbs_uobject_put(uobj);
2120
2121         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2122                          &resp, sizeof resp))
2123                 return -EFAULT;
2124
2125         return in_len;
2126 }
2127
2128 static void *alloc_wr(size_t wr_size, __u32 num_sge)
2129 {
2130         if (num_sge >= (U32_MAX - ALIGN(wr_size, sizeof (struct ib_sge))) /
2131                        sizeof (struct ib_sge))
2132                 return NULL;
2133
2134         return kmalloc(ALIGN(wr_size, sizeof (struct ib_sge)) +
2135                          num_sge * sizeof (struct ib_sge), GFP_KERNEL);
2136 }
2137
2138 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
2139                             struct ib_device *ib_dev,
2140                             const char __user *buf, int in_len,
2141                             int out_len)
2142 {
2143         struct ib_uverbs_post_send      cmd;
2144         struct ib_uverbs_post_send_resp resp;
2145         struct ib_uverbs_send_wr       *user_wr;
2146         struct ib_send_wr              *wr = NULL, *last, *next, *bad_wr;
2147         struct ib_qp                   *qp;
2148         int                             i, sg_ind;
2149         int                             is_ud;
2150         ssize_t                         ret = -EINVAL;
2151         size_t                          next_size;
2152
2153         if (copy_from_user(&cmd, buf, sizeof cmd))
2154                 return -EFAULT;
2155
2156         if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
2157             cmd.sge_count * sizeof (struct ib_uverbs_sge))
2158                 return -EINVAL;
2159
2160         if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
2161                 return -EINVAL;
2162
2163         user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
2164         if (!user_wr)
2165                 return -ENOMEM;
2166
2167         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
2168         if (!qp)
2169                 goto out;
2170
2171         is_ud = qp->qp_type == IB_QPT_UD;
2172         sg_ind = 0;
2173         last = NULL;
2174         for (i = 0; i < cmd.wr_count; ++i) {
2175                 if (copy_from_user(user_wr,
2176                                    buf + sizeof cmd + i * cmd.wqe_size,
2177                                    cmd.wqe_size)) {
2178                         ret = -EFAULT;
2179                         goto out_put;
2180                 }
2181
2182                 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
2183                         ret = -EINVAL;
2184                         goto out_put;
2185                 }
2186
2187                 if (is_ud) {
2188                         struct ib_ud_wr *ud;
2189
2190                         if (user_wr->opcode != IB_WR_SEND &&
2191                             user_wr->opcode != IB_WR_SEND_WITH_IMM) {
2192                                 ret = -EINVAL;
2193                                 goto out_put;
2194                         }
2195
2196                         next_size = sizeof(*ud);
2197                         ud = alloc_wr(next_size, user_wr->num_sge);
2198                         if (!ud) {
2199                                 ret = -ENOMEM;
2200                                 goto out_put;
2201                         }
2202
2203                         ud->ah = uobj_get_obj_read(ah, user_wr->wr.ud.ah,
2204                                                    file->ucontext);
2205                         if (!ud->ah) {
2206                                 kfree(ud);
2207                                 ret = -EINVAL;
2208                                 goto out_put;
2209                         }
2210                         ud->remote_qpn = user_wr->wr.ud.remote_qpn;
2211                         ud->remote_qkey = user_wr->wr.ud.remote_qkey;
2212
2213                         next = &ud->wr;
2214                 } else if (user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM ||
2215                            user_wr->opcode == IB_WR_RDMA_WRITE ||
2216                            user_wr->opcode == IB_WR_RDMA_READ) {
2217                         struct ib_rdma_wr *rdma;
2218
2219                         next_size = sizeof(*rdma);
2220                         rdma = alloc_wr(next_size, user_wr->num_sge);
2221                         if (!rdma) {
2222                                 ret = -ENOMEM;
2223                                 goto out_put;
2224                         }
2225
2226                         rdma->remote_addr = user_wr->wr.rdma.remote_addr;
2227                         rdma->rkey = user_wr->wr.rdma.rkey;
2228
2229                         next = &rdma->wr;
2230                 } else if (user_wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP ||
2231                            user_wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) {
2232                         struct ib_atomic_wr *atomic;
2233
2234                         next_size = sizeof(*atomic);
2235                         atomic = alloc_wr(next_size, user_wr->num_sge);
2236                         if (!atomic) {
2237                                 ret = -ENOMEM;
2238                                 goto out_put;
2239                         }
2240
2241                         atomic->remote_addr = user_wr->wr.atomic.remote_addr;
2242                         atomic->compare_add = user_wr->wr.atomic.compare_add;
2243                         atomic->swap = user_wr->wr.atomic.swap;
2244                         atomic->rkey = user_wr->wr.atomic.rkey;
2245
2246                         next = &atomic->wr;
2247                 } else if (user_wr->opcode == IB_WR_SEND ||
2248                            user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2249                            user_wr->opcode == IB_WR_SEND_WITH_INV) {
2250                         next_size = sizeof(*next);
2251                         next = alloc_wr(next_size, user_wr->num_sge);
2252                         if (!next) {
2253                                 ret = -ENOMEM;
2254                                 goto out_put;
2255                         }
2256                 } else {
2257                         ret = -EINVAL;
2258                         goto out_put;
2259                 }
2260
2261                 if (user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2262                     user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) {
2263                         next->ex.imm_data =
2264                                         (__be32 __force) user_wr->ex.imm_data;
2265                 } else if (user_wr->opcode == IB_WR_SEND_WITH_INV) {
2266                         next->ex.invalidate_rkey = user_wr->ex.invalidate_rkey;
2267                 }
2268
2269                 if (!last)
2270                         wr = next;
2271                 else
2272                         last->next = next;
2273                 last = next;
2274
2275                 next->next       = NULL;
2276                 next->wr_id      = user_wr->wr_id;
2277                 next->num_sge    = user_wr->num_sge;
2278                 next->opcode     = user_wr->opcode;
2279                 next->send_flags = user_wr->send_flags;
2280
2281                 if (next->num_sge) {
2282                         next->sg_list = (void *) next +
2283                                 ALIGN(next_size, sizeof(struct ib_sge));
2284                         if (copy_from_user(next->sg_list,
2285                                            buf + sizeof cmd +
2286                                            cmd.wr_count * cmd.wqe_size +
2287                                            sg_ind * sizeof (struct ib_sge),
2288                                            next->num_sge * sizeof (struct ib_sge))) {
2289                                 ret = -EFAULT;
2290                                 goto out_put;
2291                         }
2292                         sg_ind += next->num_sge;
2293                 } else
2294                         next->sg_list = NULL;
2295         }
2296
2297         resp.bad_wr = 0;
2298         ret = qp->device->post_send(qp->real_qp, wr, &bad_wr);
2299         if (ret)
2300                 for (next = wr; next; next = next->next) {
2301                         ++resp.bad_wr;
2302                         if (next == bad_wr)
2303                                 break;
2304                 }
2305
2306         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2307                          &resp, sizeof resp))
2308                 ret = -EFAULT;
2309
2310 out_put:
2311         uobj_put_obj_read(qp);
2312
2313         while (wr) {
2314                 if (is_ud && ud_wr(wr)->ah)
2315                         uobj_put_obj_read(ud_wr(wr)->ah);
2316                 next = wr->next;
2317                 kfree(wr);
2318                 wr = next;
2319         }
2320
2321 out:
2322         kfree(user_wr);
2323
2324         return ret ? ret : in_len;
2325 }
2326
2327 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
2328                                                     int in_len,
2329                                                     u32 wr_count,
2330                                                     u32 sge_count,
2331                                                     u32 wqe_size)
2332 {
2333         struct ib_uverbs_recv_wr *user_wr;
2334         struct ib_recv_wr        *wr = NULL, *last, *next;
2335         int                       sg_ind;
2336         int                       i;
2337         int                       ret;
2338
2339         if (in_len < wqe_size * wr_count +
2340             sge_count * sizeof (struct ib_uverbs_sge))
2341                 return ERR_PTR(-EINVAL);
2342
2343         if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
2344                 return ERR_PTR(-EINVAL);
2345
2346         user_wr = kmalloc(wqe_size, GFP_KERNEL);
2347         if (!user_wr)
2348                 return ERR_PTR(-ENOMEM);
2349
2350         sg_ind = 0;
2351         last = NULL;
2352         for (i = 0; i < wr_count; ++i) {
2353                 if (copy_from_user(user_wr, buf + i * wqe_size,
2354                                    wqe_size)) {
2355                         ret = -EFAULT;
2356                         goto err;
2357                 }
2358
2359                 if (user_wr->num_sge + sg_ind > sge_count) {
2360                         ret = -EINVAL;
2361                         goto err;
2362                 }
2363
2364                 if (user_wr->num_sge >=
2365                     (U32_MAX - ALIGN(sizeof *next, sizeof (struct ib_sge))) /
2366                     sizeof (struct ib_sge)) {
2367                         ret = -EINVAL;
2368                         goto err;
2369                 }
2370
2371                 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2372                                user_wr->num_sge * sizeof (struct ib_sge),
2373                                GFP_KERNEL);
2374                 if (!next) {
2375                         ret = -ENOMEM;
2376                         goto err;
2377                 }
2378
2379                 if (!last)
2380                         wr = next;
2381                 else
2382                         last->next = next;
2383                 last = next;
2384
2385                 next->next       = NULL;
2386                 next->wr_id      = user_wr->wr_id;
2387                 next->num_sge    = user_wr->num_sge;
2388
2389                 if (next->num_sge) {
2390                         next->sg_list = (void *) next +
2391                                 ALIGN(sizeof *next, sizeof (struct ib_sge));
2392                         if (copy_from_user(next->sg_list,
2393                                            buf + wr_count * wqe_size +
2394                                            sg_ind * sizeof (struct ib_sge),
2395                                            next->num_sge * sizeof (struct ib_sge))) {
2396                                 ret = -EFAULT;
2397                                 goto err;
2398                         }
2399                         sg_ind += next->num_sge;
2400                 } else
2401                         next->sg_list = NULL;
2402         }
2403
2404         kfree(user_wr);
2405         return wr;
2406
2407 err:
2408         kfree(user_wr);
2409
2410         while (wr) {
2411                 next = wr->next;
2412                 kfree(wr);
2413                 wr = next;
2414         }
2415
2416         return ERR_PTR(ret);
2417 }
2418
2419 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
2420                             struct ib_device *ib_dev,
2421                             const char __user *buf, int in_len,
2422                             int out_len)
2423 {
2424         struct ib_uverbs_post_recv      cmd;
2425         struct ib_uverbs_post_recv_resp resp;
2426         struct ib_recv_wr              *wr, *next, *bad_wr;
2427         struct ib_qp                   *qp;
2428         ssize_t                         ret = -EINVAL;
2429
2430         if (copy_from_user(&cmd, buf, sizeof cmd))
2431                 return -EFAULT;
2432
2433         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2434                                        in_len - sizeof cmd, cmd.wr_count,
2435                                        cmd.sge_count, cmd.wqe_size);
2436         if (IS_ERR(wr))
2437                 return PTR_ERR(wr);
2438
2439         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
2440         if (!qp)
2441                 goto out;
2442
2443         resp.bad_wr = 0;
2444         ret = qp->device->post_recv(qp->real_qp, wr, &bad_wr);
2445
2446         uobj_put_obj_read(qp);
2447         if (ret) {
2448                 for (next = wr; next; next = next->next) {
2449                         ++resp.bad_wr;
2450                         if (next == bad_wr)
2451                                 break;
2452                 }
2453         }
2454
2455         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2456                          &resp, sizeof resp))
2457                 ret = -EFAULT;
2458
2459 out:
2460         while (wr) {
2461                 next = wr->next;
2462                 kfree(wr);
2463                 wr = next;
2464         }
2465
2466         return ret ? ret : in_len;
2467 }
2468
2469 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
2470                                 struct ib_device *ib_dev,
2471                                 const char __user *buf, int in_len,
2472                                 int out_len)
2473 {
2474         struct ib_uverbs_post_srq_recv      cmd;
2475         struct ib_uverbs_post_srq_recv_resp resp;
2476         struct ib_recv_wr                  *wr, *next, *bad_wr;
2477         struct ib_srq                      *srq;
2478         ssize_t                             ret = -EINVAL;
2479
2480         if (copy_from_user(&cmd, buf, sizeof cmd))
2481                 return -EFAULT;
2482
2483         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2484                                        in_len - sizeof cmd, cmd.wr_count,
2485                                        cmd.sge_count, cmd.wqe_size);
2486         if (IS_ERR(wr))
2487                 return PTR_ERR(wr);
2488
2489         srq = uobj_get_obj_read(srq, cmd.srq_handle, file->ucontext);
2490         if (!srq)
2491                 goto out;
2492
2493         resp.bad_wr = 0;
2494         ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
2495
2496         uobj_put_obj_read(srq);
2497
2498         if (ret)
2499                 for (next = wr; next; next = next->next) {
2500                         ++resp.bad_wr;
2501                         if (next == bad_wr)
2502                                 break;
2503                 }
2504
2505         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2506                          &resp, sizeof resp))
2507                 ret = -EFAULT;
2508
2509 out:
2510         while (wr) {
2511                 next = wr->next;
2512                 kfree(wr);
2513                 wr = next;
2514         }
2515
2516         return ret ? ret : in_len;
2517 }
2518
2519 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
2520                             struct ib_device *ib_dev,
2521                             const char __user *buf, int in_len,
2522                             int out_len)
2523 {
2524         struct ib_uverbs_create_ah       cmd;
2525         struct ib_uverbs_create_ah_resp  resp;
2526         struct ib_uobject               *uobj;
2527         struct ib_pd                    *pd;
2528         struct ib_ah                    *ah;
2529         struct rdma_ah_attr             attr;
2530         int ret;
2531         struct ib_udata                   udata;
2532         u8                              *dmac;
2533
2534         if (out_len < sizeof resp)
2535                 return -ENOSPC;
2536
2537         if (copy_from_user(&cmd, buf, sizeof cmd))
2538                 return -EFAULT;
2539
2540         INIT_UDATA(&udata, buf + sizeof(cmd),
2541                    (unsigned long)cmd.response + sizeof(resp),
2542                    in_len - sizeof(cmd), out_len - sizeof(resp));
2543
2544         uobj  = uobj_alloc(uobj_get_type(ah), file->ucontext);
2545         if (IS_ERR(uobj))
2546                 return PTR_ERR(uobj);
2547
2548         pd = uobj_get_obj_read(pd, cmd.pd_handle, file->ucontext);
2549         if (!pd) {
2550                 ret = -EINVAL;
2551                 goto err;
2552         }
2553
2554         rdma_ah_set_dlid(&attr, cmd.attr.dlid);
2555         rdma_ah_set_sl(&attr, cmd.attr.sl);
2556         rdma_ah_set_path_bits(&attr, cmd.attr.src_path_bits);
2557         rdma_ah_set_static_rate(&attr, cmd.attr.static_rate);
2558         rdma_ah_set_port_num(&attr, cmd.attr.port_num);
2559
2560         if (cmd.attr.is_global) {
2561                 rdma_ah_set_grh(&attr, NULL, cmd.attr.grh.flow_label,
2562                                 cmd.attr.grh.sgid_index,
2563                                 cmd.attr.grh.hop_limit,
2564                                 cmd.attr.grh.traffic_class);
2565                 rdma_ah_set_dgid_raw(&attr, cmd.attr.grh.dgid);
2566         } else {
2567                 rdma_ah_set_ah_flags(&attr, 0);
2568         }
2569         dmac = rdma_ah_retrieve_dmac(&attr);
2570         if (dmac)
2571                 memset(dmac, 0, ETH_ALEN);
2572
2573         ah = pd->device->create_ah(pd, &attr, &udata);
2574
2575         if (IS_ERR(ah)) {
2576                 ret = PTR_ERR(ah);
2577                 goto err_put;
2578         }
2579
2580         ah->device  = pd->device;
2581         ah->pd      = pd;
2582         atomic_inc(&pd->usecnt);
2583         ah->uobject  = uobj;
2584         uobj->user_handle = cmd.user_handle;
2585         uobj->object = ah;
2586
2587         resp.ah_handle = uobj->id;
2588
2589         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2590                          &resp, sizeof resp)) {
2591                 ret = -EFAULT;
2592                 goto err_copy;
2593         }
2594
2595         uobj_put_obj_read(pd);
2596         uobj_alloc_commit(uobj);
2597
2598         return in_len;
2599
2600 err_copy:
2601         rdma_destroy_ah(ah);
2602
2603 err_put:
2604         uobj_put_obj_read(pd);
2605
2606 err:
2607         uobj_alloc_abort(uobj);
2608         return ret;
2609 }
2610
2611 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
2612                              struct ib_device *ib_dev,
2613                              const char __user *buf, int in_len, int out_len)
2614 {
2615         struct ib_uverbs_destroy_ah cmd;
2616         struct ib_uobject          *uobj;
2617         int                         ret;
2618
2619         if (copy_from_user(&cmd, buf, sizeof cmd))
2620                 return -EFAULT;
2621
2622         uobj  = uobj_get_write(uobj_get_type(ah), cmd.ah_handle,
2623                                file->ucontext);
2624         if (IS_ERR(uobj))
2625                 return PTR_ERR(uobj);
2626
2627         ret = uobj_remove_commit(uobj);
2628         return ret ?: in_len;
2629 }
2630
2631 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
2632                                struct ib_device *ib_dev,
2633                                const char __user *buf, int in_len,
2634                                int out_len)
2635 {
2636         struct ib_uverbs_attach_mcast cmd;
2637         struct ib_qp                 *qp;
2638         struct ib_uqp_object         *obj;
2639         struct ib_uverbs_mcast_entry *mcast;
2640         int                           ret;
2641
2642         if (copy_from_user(&cmd, buf, sizeof cmd))
2643                 return -EFAULT;
2644
2645         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
2646         if (!qp)
2647                 return -EINVAL;
2648
2649         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2650
2651         mutex_lock(&obj->mcast_lock);
2652         list_for_each_entry(mcast, &obj->mcast_list, list)
2653                 if (cmd.mlid == mcast->lid &&
2654                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2655                         ret = 0;
2656                         goto out_put;
2657                 }
2658
2659         mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
2660         if (!mcast) {
2661                 ret = -ENOMEM;
2662                 goto out_put;
2663         }
2664
2665         mcast->lid = cmd.mlid;
2666         memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
2667
2668         ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
2669         if (!ret)
2670                 list_add_tail(&mcast->list, &obj->mcast_list);
2671         else
2672                 kfree(mcast);
2673
2674 out_put:
2675         mutex_unlock(&obj->mcast_lock);
2676         uobj_put_obj_read(qp);
2677
2678         return ret ? ret : in_len;
2679 }
2680
2681 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
2682                                struct ib_device *ib_dev,
2683                                const char __user *buf, int in_len,
2684                                int out_len)
2685 {
2686         struct ib_uverbs_detach_mcast cmd;
2687         struct ib_uqp_object         *obj;
2688         struct ib_qp                 *qp;
2689         struct ib_uverbs_mcast_entry *mcast;
2690         int                           ret = -EINVAL;
2691         bool                          found = false;
2692
2693         if (copy_from_user(&cmd, buf, sizeof cmd))
2694                 return -EFAULT;
2695
2696         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
2697         if (!qp)
2698                 return -EINVAL;
2699
2700         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2701         mutex_lock(&obj->mcast_lock);
2702
2703         list_for_each_entry(mcast, &obj->mcast_list, list)
2704                 if (cmd.mlid == mcast->lid &&
2705                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2706                         list_del(&mcast->list);
2707                         kfree(mcast);
2708                         found = true;
2709                         break;
2710                 }
2711
2712         if (!found) {
2713                 ret = -EINVAL;
2714                 goto out_put;
2715         }
2716
2717         ret = ib_detach_mcast(qp, (union ib_gid *)cmd.gid, cmd.mlid);
2718
2719 out_put:
2720         mutex_unlock(&obj->mcast_lock);
2721         uobj_put_obj_read(qp);
2722         return ret ? ret : in_len;
2723 }
2724
2725 static int kern_spec_to_ib_spec_action(struct ib_uverbs_flow_spec *kern_spec,
2726                                        union ib_flow_spec *ib_spec)
2727 {
2728         ib_spec->type = kern_spec->type;
2729         switch (ib_spec->type) {
2730         case IB_FLOW_SPEC_ACTION_TAG:
2731                 if (kern_spec->flow_tag.size !=
2732                     sizeof(struct ib_uverbs_flow_spec_action_tag))
2733                         return -EINVAL;
2734
2735                 ib_spec->flow_tag.size = sizeof(struct ib_flow_spec_action_tag);
2736                 ib_spec->flow_tag.tag_id = kern_spec->flow_tag.tag_id;
2737                 break;
2738         case IB_FLOW_SPEC_ACTION_DROP:
2739                 if (kern_spec->drop.size !=
2740                     sizeof(struct ib_uverbs_flow_spec_action_drop))
2741                         return -EINVAL;
2742
2743                 ib_spec->drop.size = sizeof(struct ib_flow_spec_action_drop);
2744                 break;
2745         default:
2746                 return -EINVAL;
2747         }
2748         return 0;
2749 }
2750
2751 static size_t kern_spec_filter_sz(struct ib_uverbs_flow_spec_hdr *spec)
2752 {
2753         /* Returns user space filter size, includes padding */
2754         return (spec->size - sizeof(struct ib_uverbs_flow_spec_hdr)) / 2;
2755 }
2756
2757 static ssize_t spec_filter_size(void *kern_spec_filter, u16 kern_filter_size,
2758                                 u16 ib_real_filter_sz)
2759 {
2760         /*
2761          * User space filter structures must be 64 bit aligned, otherwise this
2762          * may pass, but we won't handle additional new attributes.
2763          */
2764
2765         if (kern_filter_size > ib_real_filter_sz) {
2766                 if (memchr_inv(kern_spec_filter +
2767                                ib_real_filter_sz, 0,
2768                                kern_filter_size - ib_real_filter_sz))
2769                         return -EINVAL;
2770                 return ib_real_filter_sz;
2771         }
2772         return kern_filter_size;
2773 }
2774
2775 static int kern_spec_to_ib_spec_filter(struct ib_uverbs_flow_spec *kern_spec,
2776                                        union ib_flow_spec *ib_spec)
2777 {
2778         ssize_t actual_filter_sz;
2779         ssize_t kern_filter_sz;
2780         ssize_t ib_filter_sz;
2781         void *kern_spec_mask;
2782         void *kern_spec_val;
2783
2784         if (kern_spec->reserved)
2785                 return -EINVAL;
2786
2787         ib_spec->type = kern_spec->type;
2788
2789         kern_filter_sz = kern_spec_filter_sz(&kern_spec->hdr);
2790         /* User flow spec size must be aligned to 4 bytes */
2791         if (kern_filter_sz != ALIGN(kern_filter_sz, 4))
2792                 return -EINVAL;
2793
2794         kern_spec_val = (void *)kern_spec +
2795                 sizeof(struct ib_uverbs_flow_spec_hdr);
2796         kern_spec_mask = kern_spec_val + kern_filter_sz;
2797         if (ib_spec->type == (IB_FLOW_SPEC_INNER | IB_FLOW_SPEC_VXLAN_TUNNEL))
2798                 return -EINVAL;
2799
2800         switch (ib_spec->type & ~IB_FLOW_SPEC_INNER) {
2801         case IB_FLOW_SPEC_ETH:
2802                 ib_filter_sz = offsetof(struct ib_flow_eth_filter, real_sz);
2803                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2804                                                     kern_filter_sz,
2805                                                     ib_filter_sz);
2806                 if (actual_filter_sz <= 0)
2807                         return -EINVAL;
2808                 ib_spec->size = sizeof(struct ib_flow_spec_eth);
2809                 memcpy(&ib_spec->eth.val, kern_spec_val, actual_filter_sz);
2810                 memcpy(&ib_spec->eth.mask, kern_spec_mask, actual_filter_sz);
2811                 break;
2812         case IB_FLOW_SPEC_IPV4:
2813                 ib_filter_sz = offsetof(struct ib_flow_ipv4_filter, real_sz);
2814                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2815                                                     kern_filter_sz,
2816                                                     ib_filter_sz);
2817                 if (actual_filter_sz <= 0)
2818                         return -EINVAL;
2819                 ib_spec->size = sizeof(struct ib_flow_spec_ipv4);
2820                 memcpy(&ib_spec->ipv4.val, kern_spec_val, actual_filter_sz);
2821                 memcpy(&ib_spec->ipv4.mask, kern_spec_mask, actual_filter_sz);
2822                 break;
2823         case IB_FLOW_SPEC_IPV6:
2824                 ib_filter_sz = offsetof(struct ib_flow_ipv6_filter, real_sz);
2825                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2826                                                     kern_filter_sz,
2827                                                     ib_filter_sz);
2828                 if (actual_filter_sz <= 0)
2829                         return -EINVAL;
2830                 ib_spec->size = sizeof(struct ib_flow_spec_ipv6);
2831                 memcpy(&ib_spec->ipv6.val, kern_spec_val, actual_filter_sz);
2832                 memcpy(&ib_spec->ipv6.mask, kern_spec_mask, actual_filter_sz);
2833
2834                 if ((ntohl(ib_spec->ipv6.mask.flow_label)) >= BIT(20) ||
2835                     (ntohl(ib_spec->ipv6.val.flow_label)) >= BIT(20))
2836                         return -EINVAL;
2837                 break;
2838         case IB_FLOW_SPEC_TCP:
2839         case IB_FLOW_SPEC_UDP:
2840                 ib_filter_sz = offsetof(struct ib_flow_tcp_udp_filter, real_sz);
2841                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2842                                                     kern_filter_sz,
2843                                                     ib_filter_sz);
2844                 if (actual_filter_sz <= 0)
2845                         return -EINVAL;
2846                 ib_spec->size = sizeof(struct ib_flow_spec_tcp_udp);
2847                 memcpy(&ib_spec->tcp_udp.val, kern_spec_val, actual_filter_sz);
2848                 memcpy(&ib_spec->tcp_udp.mask, kern_spec_mask, actual_filter_sz);
2849                 break;
2850         case IB_FLOW_SPEC_VXLAN_TUNNEL:
2851                 ib_filter_sz = offsetof(struct ib_flow_tunnel_filter, real_sz);
2852                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2853                                                     kern_filter_sz,
2854                                                     ib_filter_sz);
2855                 if (actual_filter_sz <= 0)
2856                         return -EINVAL;
2857                 ib_spec->tunnel.size = sizeof(struct ib_flow_spec_tunnel);
2858                 memcpy(&ib_spec->tunnel.val, kern_spec_val, actual_filter_sz);
2859                 memcpy(&ib_spec->tunnel.mask, kern_spec_mask, actual_filter_sz);
2860
2861                 if ((ntohl(ib_spec->tunnel.mask.tunnel_id)) >= BIT(24) ||
2862                     (ntohl(ib_spec->tunnel.val.tunnel_id)) >= BIT(24))
2863                         return -EINVAL;
2864                 break;
2865         default:
2866                 return -EINVAL;
2867         }
2868         return 0;
2869 }
2870
2871 static int kern_spec_to_ib_spec(struct ib_uverbs_flow_spec *kern_spec,
2872                                 union ib_flow_spec *ib_spec)
2873 {
2874         if (kern_spec->reserved)
2875                 return -EINVAL;
2876
2877         if (kern_spec->type >= IB_FLOW_SPEC_ACTION_TAG)
2878                 return kern_spec_to_ib_spec_action(kern_spec, ib_spec);
2879         else
2880                 return kern_spec_to_ib_spec_filter(kern_spec, ib_spec);
2881 }
2882
2883 int ib_uverbs_ex_create_wq(struct ib_uverbs_file *file,
2884                            struct ib_device *ib_dev,
2885                            struct ib_udata *ucore,
2886                            struct ib_udata *uhw)
2887 {
2888         struct ib_uverbs_ex_create_wq     cmd = {};
2889         struct ib_uverbs_ex_create_wq_resp resp = {};
2890         struct ib_uwq_object           *obj;
2891         int err = 0;
2892         struct ib_cq *cq;
2893         struct ib_pd *pd;
2894         struct ib_wq *wq;
2895         struct ib_wq_init_attr wq_init_attr = {};
2896         size_t required_cmd_sz;
2897         size_t required_resp_len;
2898
2899         required_cmd_sz = offsetof(typeof(cmd), max_sge) + sizeof(cmd.max_sge);
2900         required_resp_len = offsetof(typeof(resp), wqn) + sizeof(resp.wqn);
2901
2902         if (ucore->inlen < required_cmd_sz)
2903                 return -EINVAL;
2904
2905         if (ucore->outlen < required_resp_len)
2906                 return -ENOSPC;
2907
2908         if (ucore->inlen > sizeof(cmd) &&
2909             !ib_is_udata_cleared(ucore, sizeof(cmd),
2910                                  ucore->inlen - sizeof(cmd)))
2911                 return -EOPNOTSUPP;
2912
2913         err = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
2914         if (err)
2915                 return err;
2916
2917         if (cmd.comp_mask)
2918                 return -EOPNOTSUPP;
2919
2920         obj  = (struct ib_uwq_object *)uobj_alloc(uobj_get_type(wq),
2921                                                   file->ucontext);
2922         if (IS_ERR(obj))
2923                 return PTR_ERR(obj);
2924
2925         pd  = uobj_get_obj_read(pd, cmd.pd_handle, file->ucontext);
2926         if (!pd) {
2927                 err = -EINVAL;
2928                 goto err_uobj;
2929         }
2930
2931         cq = uobj_get_obj_read(cq, cmd.cq_handle, file->ucontext);
2932         if (!cq) {
2933                 err = -EINVAL;
2934                 goto err_put_pd;
2935         }
2936
2937         wq_init_attr.cq = cq;
2938         wq_init_attr.max_sge = cmd.max_sge;
2939         wq_init_attr.max_wr = cmd.max_wr;
2940         wq_init_attr.wq_context = file;
2941         wq_init_attr.wq_type = cmd.wq_type;
2942         wq_init_attr.event_handler = ib_uverbs_wq_event_handler;
2943         if (ucore->inlen >= (offsetof(typeof(cmd), create_flags) +
2944                              sizeof(cmd.create_flags)))
2945                 wq_init_attr.create_flags = cmd.create_flags;
2946         obj->uevent.events_reported = 0;
2947         INIT_LIST_HEAD(&obj->uevent.event_list);
2948         wq = pd->device->create_wq(pd, &wq_init_attr, uhw);
2949         if (IS_ERR(wq)) {
2950                 err = PTR_ERR(wq);
2951                 goto err_put_cq;
2952         }
2953
2954         wq->uobject = &obj->uevent.uobject;
2955         obj->uevent.uobject.object = wq;
2956         wq->wq_type = wq_init_attr.wq_type;
2957         wq->cq = cq;
2958         wq->pd = pd;
2959         wq->device = pd->device;
2960         wq->wq_context = wq_init_attr.wq_context;
2961         atomic_set(&wq->usecnt, 0);
2962         atomic_inc(&pd->usecnt);
2963         atomic_inc(&cq->usecnt);
2964         wq->uobject = &obj->uevent.uobject;
2965         obj->uevent.uobject.object = wq;
2966
2967         memset(&resp, 0, sizeof(resp));
2968         resp.wq_handle = obj->uevent.uobject.id;
2969         resp.max_sge = wq_init_attr.max_sge;
2970         resp.max_wr = wq_init_attr.max_wr;
2971         resp.wqn = wq->wq_num;
2972         resp.response_length = required_resp_len;
2973         err = ib_copy_to_udata(ucore,
2974                                &resp, resp.response_length);
2975         if (err)
2976                 goto err_copy;
2977
2978         uobj_put_obj_read(pd);
2979         uobj_put_obj_read(cq);
2980         uobj_alloc_commit(&obj->uevent.uobject);
2981         return 0;
2982
2983 err_copy:
2984         ib_destroy_wq(wq);
2985 err_put_cq:
2986         uobj_put_obj_read(cq);
2987 err_put_pd:
2988         uobj_put_obj_read(pd);
2989 err_uobj:
2990         uobj_alloc_abort(&obj->uevent.uobject);
2991
2992         return err;
2993 }
2994
2995 int ib_uverbs_ex_destroy_wq(struct ib_uverbs_file *file,
2996                             struct ib_device *ib_dev,
2997                             struct ib_udata *ucore,
2998                             struct ib_udata *uhw)
2999 {
3000         struct ib_uverbs_ex_destroy_wq  cmd = {};
3001         struct ib_uverbs_ex_destroy_wq_resp     resp = {};
3002         struct ib_wq                    *wq;
3003         struct ib_uobject               *uobj;
3004         struct ib_uwq_object            *obj;
3005         size_t required_cmd_sz;
3006         size_t required_resp_len;
3007         int                             ret;
3008
3009         required_cmd_sz = offsetof(typeof(cmd), wq_handle) + sizeof(cmd.wq_handle);
3010         required_resp_len = offsetof(typeof(resp), reserved) + sizeof(resp.reserved);
3011
3012         if (ucore->inlen < required_cmd_sz)
3013                 return -EINVAL;
3014
3015         if (ucore->outlen < required_resp_len)
3016                 return -ENOSPC;
3017
3018         if (ucore->inlen > sizeof(cmd) &&
3019             !ib_is_udata_cleared(ucore, sizeof(cmd),
3020                                  ucore->inlen - sizeof(cmd)))
3021                 return -EOPNOTSUPP;
3022
3023         ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
3024         if (ret)
3025                 return ret;
3026
3027         if (cmd.comp_mask)
3028                 return -EOPNOTSUPP;
3029
3030         resp.response_length = required_resp_len;
3031         uobj  = uobj_get_write(uobj_get_type(wq), cmd.wq_handle,
3032                                file->ucontext);
3033         if (IS_ERR(uobj))
3034                 return PTR_ERR(uobj);
3035
3036         wq = uobj->object;
3037         obj = container_of(uobj, struct ib_uwq_object, uevent.uobject);
3038         /*
3039          * Make sure we don't free the memory in remove_commit as we still
3040          * needs the uobject memory to create the response.
3041          */
3042         uverbs_uobject_get(uobj);
3043
3044         ret = uobj_remove_commit(uobj);
3045         resp.events_reported = obj->uevent.events_reported;
3046         uverbs_uobject_put(uobj);
3047         if (ret)
3048                 return ret;
3049
3050         return ib_copy_to_udata(ucore, &resp, resp.response_length);
3051 }
3052
3053 int ib_uverbs_ex_modify_wq(struct ib_uverbs_file *file,
3054                            struct ib_device *ib_dev,
3055                            struct ib_udata *ucore,
3056                            struct ib_udata *uhw)
3057 {
3058         struct ib_uverbs_ex_modify_wq cmd = {};
3059         struct ib_wq *wq;
3060         struct ib_wq_attr wq_attr = {};
3061         size_t required_cmd_sz;
3062         int ret;
3063
3064         required_cmd_sz = offsetof(typeof(cmd), curr_wq_state) + sizeof(cmd.curr_wq_state);
3065         if (ucore->inlen < required_cmd_sz)
3066                 return -EINVAL;
3067
3068         if (ucore->inlen > sizeof(cmd) &&
3069             !ib_is_udata_cleared(ucore, sizeof(cmd),
3070                                  ucore->inlen - sizeof(cmd)))
3071                 return -EOPNOTSUPP;
3072
3073         ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
3074         if (ret)
3075                 return ret;
3076
3077         if (!cmd.attr_mask)
3078                 return -EINVAL;
3079
3080         if (cmd.attr_mask > (IB_WQ_STATE | IB_WQ_CUR_STATE | IB_WQ_FLAGS))
3081                 return -EINVAL;
3082
3083         wq = uobj_get_obj_read(wq, cmd.wq_handle, file->ucontext);
3084         if (!wq)
3085                 return -EINVAL;
3086
3087         wq_attr.curr_wq_state = cmd.curr_wq_state;
3088         wq_attr.wq_state = cmd.wq_state;
3089         if (cmd.attr_mask & IB_WQ_FLAGS) {
3090                 wq_attr.flags = cmd.flags;
3091                 wq_attr.flags_mask = cmd.flags_mask;
3092         }
3093         ret = wq->device->modify_wq(wq, &wq_attr, cmd.attr_mask, uhw);
3094         uobj_put_obj_read(wq);
3095         return ret;
3096 }
3097
3098 int ib_uverbs_ex_create_rwq_ind_table(struct ib_uverbs_file *file,
3099                                       struct ib_device *ib_dev,
3100                                       struct ib_udata *ucore,
3101                                       struct ib_udata *uhw)
3102 {
3103         struct ib_uverbs_ex_create_rwq_ind_table          cmd = {};
3104         struct ib_uverbs_ex_create_rwq_ind_table_resp  resp = {};
3105         struct ib_uobject                 *uobj;
3106         int err = 0;
3107         struct ib_rwq_ind_table_init_attr init_attr = {};
3108         struct ib_rwq_ind_table *rwq_ind_tbl;
3109         struct ib_wq    **wqs = NULL;
3110         u32 *wqs_handles = NULL;
3111         struct ib_wq    *wq = NULL;
3112         int i, j, num_read_wqs;
3113         u32 num_wq_handles;
3114         u32 expected_in_size;
3115         size_t required_cmd_sz_header;
3116         size_t required_resp_len;
3117
3118         required_cmd_sz_header = offsetof(typeof(cmd), log_ind_tbl_size) + sizeof(cmd.log_ind_tbl_size);
3119         required_resp_len = offsetof(typeof(resp), ind_tbl_num) + sizeof(resp.ind_tbl_num);
3120
3121         if (ucore->inlen < required_cmd_sz_header)
3122                 return -EINVAL;
3123
3124         if (ucore->outlen < required_resp_len)
3125                 return -ENOSPC;
3126
3127         err = ib_copy_from_udata(&cmd, ucore, required_cmd_sz_header);
3128         if (err)
3129                 return err;
3130
3131         ucore->inbuf += required_cmd_sz_header;
3132         ucore->inlen -= required_cmd_sz_header;
3133
3134         if (cmd.comp_mask)
3135                 return -EOPNOTSUPP;
3136
3137         if (cmd.log_ind_tbl_size > IB_USER_VERBS_MAX_LOG_IND_TBL_SIZE)
3138                 return -EINVAL;
3139
3140         num_wq_handles = 1 << cmd.log_ind_tbl_size;
3141         expected_in_size = num_wq_handles * sizeof(__u32);
3142         if (num_wq_handles == 1)
3143                 /* input size for wq handles is u64 aligned */
3144                 expected_in_size += sizeof(__u32);
3145
3146         if (ucore->inlen < expected_in_size)
3147                 return -EINVAL;
3148
3149         if (ucore->inlen > expected_in_size &&
3150             !ib_is_udata_cleared(ucore, expected_in_size,
3151                                  ucore->inlen - expected_in_size))
3152                 return -EOPNOTSUPP;
3153
3154         wqs_handles = kcalloc(num_wq_handles, sizeof(*wqs_handles),
3155                               GFP_KERNEL);
3156         if (!wqs_handles)
3157                 return -ENOMEM;
3158
3159         err = ib_copy_from_udata(wqs_handles, ucore,
3160                                  num_wq_handles * sizeof(__u32));
3161         if (err)
3162                 goto err_free;
3163
3164         wqs = kcalloc(num_wq_handles, sizeof(*wqs), GFP_KERNEL);
3165         if (!wqs) {
3166                 err = -ENOMEM;
3167                 goto  err_free;
3168         }
3169
3170         for (num_read_wqs = 0; num_read_wqs < num_wq_handles;
3171                         num_read_wqs++) {
3172                 wq = uobj_get_obj_read(wq, wqs_handles[num_read_wqs],
3173                                        file->ucontext);
3174                 if (!wq) {
3175                         err = -EINVAL;
3176                         goto put_wqs;
3177                 }
3178
3179                 wqs[num_read_wqs] = wq;
3180         }
3181
3182         uobj  = uobj_alloc(uobj_get_type(rwq_ind_table), file->ucontext);
3183         if (IS_ERR(uobj)) {
3184                 err = PTR_ERR(uobj);
3185                 goto put_wqs;
3186         }
3187
3188         init_attr.log_ind_tbl_size = cmd.log_ind_tbl_size;
3189         init_attr.ind_tbl = wqs;
3190         rwq_ind_tbl = ib_dev->create_rwq_ind_table(ib_dev, &init_attr, uhw);
3191
3192         if (IS_ERR(rwq_ind_tbl)) {
3193                 err = PTR_ERR(rwq_ind_tbl);
3194                 goto err_uobj;
3195         }
3196
3197         rwq_ind_tbl->ind_tbl = wqs;
3198         rwq_ind_tbl->log_ind_tbl_size = init_attr.log_ind_tbl_size;
3199         rwq_ind_tbl->uobject = uobj;
3200         uobj->object = rwq_ind_tbl;
3201         rwq_ind_tbl->device = ib_dev;
3202         atomic_set(&rwq_ind_tbl->usecnt, 0);
3203
3204         for (i = 0; i < num_wq_handles; i++)
3205                 atomic_inc(&wqs[i]->usecnt);
3206
3207         resp.ind_tbl_handle = uobj->id;
3208         resp.ind_tbl_num = rwq_ind_tbl->ind_tbl_num;
3209         resp.response_length = required_resp_len;
3210
3211         err = ib_copy_to_udata(ucore,
3212                                &resp, resp.response_length);
3213         if (err)
3214                 goto err_copy;
3215
3216         kfree(wqs_handles);
3217
3218         for (j = 0; j < num_read_wqs; j++)
3219                 uobj_put_obj_read(wqs[j]);
3220
3221         uobj_alloc_commit(uobj);
3222         return 0;
3223
3224 err_copy:
3225         ib_destroy_rwq_ind_table(rwq_ind_tbl);
3226 err_uobj:
3227         uobj_alloc_abort(uobj);
3228 put_wqs:
3229         for (j = 0; j < num_read_wqs; j++)
3230                 uobj_put_obj_read(wqs[j]);
3231 err_free:
3232         kfree(wqs_handles);
3233         kfree(wqs);
3234         return err;
3235 }
3236
3237 int ib_uverbs_ex_destroy_rwq_ind_table(struct ib_uverbs_file *file,
3238                                        struct ib_device *ib_dev,
3239                                        struct ib_udata *ucore,
3240                                        struct ib_udata *uhw)
3241 {
3242         struct ib_uverbs_ex_destroy_rwq_ind_table       cmd = {};
3243         struct ib_uobject               *uobj;
3244         int                     ret;
3245         size_t required_cmd_sz;
3246
3247         required_cmd_sz = offsetof(typeof(cmd), ind_tbl_handle) + sizeof(cmd.ind_tbl_handle);
3248
3249         if (ucore->inlen < required_cmd_sz)
3250                 return -EINVAL;
3251
3252         if (ucore->inlen > sizeof(cmd) &&
3253             !ib_is_udata_cleared(ucore, sizeof(cmd),
3254                                  ucore->inlen - sizeof(cmd)))
3255                 return -EOPNOTSUPP;
3256
3257         ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
3258         if (ret)
3259                 return ret;
3260
3261         if (cmd.comp_mask)
3262                 return -EOPNOTSUPP;
3263
3264         uobj  = uobj_get_write(uobj_get_type(rwq_ind_table), cmd.ind_tbl_handle,
3265                                file->ucontext);
3266         if (IS_ERR(uobj))
3267                 return PTR_ERR(uobj);
3268
3269         return uobj_remove_commit(uobj);
3270 }
3271
3272 int ib_uverbs_ex_create_flow(struct ib_uverbs_file *file,
3273                              struct ib_device *ib_dev,
3274                              struct ib_udata *ucore,
3275                              struct ib_udata *uhw)
3276 {
3277         struct ib_uverbs_create_flow      cmd;
3278         struct ib_uverbs_create_flow_resp resp;
3279         struct ib_uobject                 *uobj;
3280         struct ib_flow                    *flow_id;
3281         struct ib_uverbs_flow_attr        *kern_flow_attr;
3282         struct ib_flow_attr               *flow_attr;
3283         struct ib_qp                      *qp;
3284         int err = 0;
3285         void *kern_spec;
3286         void *ib_spec;
3287         int i;
3288
3289         if (ucore->inlen < sizeof(cmd))
3290                 return -EINVAL;
3291
3292         if (ucore->outlen < sizeof(resp))
3293                 return -ENOSPC;
3294
3295         err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3296         if (err)
3297                 return err;
3298
3299         ucore->inbuf += sizeof(cmd);
3300         ucore->inlen -= sizeof(cmd);
3301
3302         if (cmd.comp_mask)
3303                 return -EINVAL;
3304
3305         if (!capable(CAP_NET_RAW))
3306                 return -EPERM;
3307
3308         if (cmd.flow_attr.flags >= IB_FLOW_ATTR_FLAGS_RESERVED)
3309                 return -EINVAL;
3310
3311         if ((cmd.flow_attr.flags & IB_FLOW_ATTR_FLAGS_DONT_TRAP) &&
3312             ((cmd.flow_attr.type == IB_FLOW_ATTR_ALL_DEFAULT) ||
3313              (cmd.flow_attr.type == IB_FLOW_ATTR_MC_DEFAULT)))
3314                 return -EINVAL;
3315
3316         if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS)
3317                 return -EINVAL;
3318
3319         if (cmd.flow_attr.size > ucore->inlen ||
3320             cmd.flow_attr.size >
3321             (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec)))
3322                 return -EINVAL;
3323
3324         if (cmd.flow_attr.reserved[0] ||
3325             cmd.flow_attr.reserved[1])
3326                 return -EINVAL;
3327
3328         if (cmd.flow_attr.num_of_specs) {
3329                 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size,
3330                                          GFP_KERNEL);
3331                 if (!kern_flow_attr)
3332                         return -ENOMEM;
3333
3334                 memcpy(kern_flow_attr, &cmd.flow_attr, sizeof(*kern_flow_attr));
3335                 err = ib_copy_from_udata(kern_flow_attr + 1, ucore,
3336                                          cmd.flow_attr.size);
3337                 if (err)
3338                         goto err_free_attr;
3339         } else {
3340                 kern_flow_attr = &cmd.flow_attr;
3341         }
3342
3343         uobj  = uobj_alloc(uobj_get_type(flow), file->ucontext);
3344         if (IS_ERR(uobj)) {
3345                 err = PTR_ERR(uobj);
3346                 goto err_free_attr;
3347         }
3348
3349         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
3350         if (!qp) {
3351                 err = -EINVAL;
3352                 goto err_uobj;
3353         }
3354
3355         flow_attr = kzalloc(sizeof(*flow_attr) + cmd.flow_attr.num_of_specs *
3356                             sizeof(union ib_flow_spec), GFP_KERNEL);
3357         if (!flow_attr) {
3358                 err = -ENOMEM;
3359                 goto err_put;
3360         }
3361
3362         flow_attr->type = kern_flow_attr->type;
3363         flow_attr->priority = kern_flow_attr->priority;
3364         flow_attr->num_of_specs = kern_flow_attr->num_of_specs;
3365         flow_attr->port = kern_flow_attr->port;
3366         flow_attr->flags = kern_flow_attr->flags;
3367         flow_attr->size = sizeof(*flow_attr);
3368
3369         kern_spec = kern_flow_attr + 1;
3370         ib_spec = flow_attr + 1;
3371         for (i = 0; i < flow_attr->num_of_specs &&
3372              cmd.flow_attr.size > offsetof(struct ib_uverbs_flow_spec, reserved) &&
3373              cmd.flow_attr.size >=
3374              ((struct ib_uverbs_flow_spec *)kern_spec)->size; i++) {
3375                 err = kern_spec_to_ib_spec(kern_spec, ib_spec);
3376                 if (err)
3377                         goto err_free;
3378                 flow_attr->size +=
3379                         ((union ib_flow_spec *) ib_spec)->size;
3380                 cmd.flow_attr.size -= ((struct ib_uverbs_flow_spec *)kern_spec)->size;
3381                 kern_spec += ((struct ib_uverbs_flow_spec *) kern_spec)->size;
3382                 ib_spec += ((union ib_flow_spec *) ib_spec)->size;
3383         }
3384         if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) {
3385                 pr_warn("create flow failed, flow %d: %d bytes left from uverb cmd\n",
3386                         i, cmd.flow_attr.size);
3387                 err = -EINVAL;
3388                 goto err_free;
3389         }
3390         flow_id = ib_create_flow(qp, flow_attr, IB_FLOW_DOMAIN_USER);
3391         if (IS_ERR(flow_id)) {
3392                 err = PTR_ERR(flow_id);
3393                 goto err_free;
3394         }
3395         flow_id->uobject = uobj;
3396         uobj->object = flow_id;
3397
3398         memset(&resp, 0, sizeof(resp));
3399         resp.flow_handle = uobj->id;
3400
3401         err = ib_copy_to_udata(ucore,
3402                                &resp, sizeof(resp));
3403         if (err)
3404                 goto err_copy;
3405
3406         uobj_put_obj_read(qp);
3407         uobj_alloc_commit(uobj);
3408         kfree(flow_attr);
3409         if (cmd.flow_attr.num_of_specs)
3410                 kfree(kern_flow_attr);
3411         return 0;
3412 err_copy:
3413         ib_destroy_flow(flow_id);
3414 err_free:
3415         kfree(flow_attr);
3416 err_put:
3417         uobj_put_obj_read(qp);
3418 err_uobj:
3419         uobj_alloc_abort(uobj);
3420 err_free_attr:
3421         if (cmd.flow_attr.num_of_specs)
3422                 kfree(kern_flow_attr);
3423         return err;
3424 }
3425
3426 int ib_uverbs_ex_destroy_flow(struct ib_uverbs_file *file,
3427                               struct ib_device *ib_dev,
3428                               struct ib_udata *ucore,
3429                               struct ib_udata *uhw)
3430 {
3431         struct ib_uverbs_destroy_flow   cmd;
3432         struct ib_uobject               *uobj;
3433         int                             ret;
3434
3435         if (ucore->inlen < sizeof(cmd))
3436                 return -EINVAL;
3437
3438         ret = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3439         if (ret)
3440                 return ret;
3441
3442         if (cmd.comp_mask)
3443                 return -EINVAL;
3444
3445         uobj  = uobj_get_write(uobj_get_type(flow), cmd.flow_handle,
3446                                file->ucontext);
3447         if (IS_ERR(uobj))
3448                 return PTR_ERR(uobj);
3449
3450         ret = uobj_remove_commit(uobj);
3451         return ret;
3452 }
3453
3454 static int __uverbs_create_xsrq(struct ib_uverbs_file *file,
3455                                 struct ib_device *ib_dev,
3456                                 struct ib_uverbs_create_xsrq *cmd,
3457                                 struct ib_udata *udata)
3458 {
3459         struct ib_uverbs_create_srq_resp resp;
3460         struct ib_usrq_object           *obj;
3461         struct ib_pd                    *pd;
3462         struct ib_srq                   *srq;
3463         struct ib_uobject               *uninitialized_var(xrcd_uobj);
3464         struct ib_srq_init_attr          attr;
3465         int ret;
3466
3467         obj  = (struct ib_usrq_object *)uobj_alloc(uobj_get_type(srq),
3468                                                    file->ucontext);
3469         if (IS_ERR(obj))
3470                 return PTR_ERR(obj);
3471
3472         if (cmd->srq_type == IB_SRQT_XRC) {
3473                 xrcd_uobj = uobj_get_read(uobj_get_type(xrcd), cmd->xrcd_handle,
3474                                           file->ucontext);
3475                 if (IS_ERR(xrcd_uobj)) {
3476                         ret = -EINVAL;
3477                         goto err;
3478                 }
3479
3480                 attr.ext.xrc.xrcd = (struct ib_xrcd *)xrcd_uobj->object;
3481                 if (!attr.ext.xrc.xrcd) {
3482                         ret = -EINVAL;
3483                         goto err_put_xrcd;
3484                 }
3485
3486                 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
3487                 atomic_inc(&obj->uxrcd->refcnt);
3488
3489                 attr.ext.xrc.cq  = uobj_get_obj_read(cq, cmd->cq_handle,
3490                                                      file->ucontext);
3491                 if (!attr.ext.xrc.cq) {
3492                         ret = -EINVAL;
3493                         goto err_put_xrcd;
3494                 }
3495         }
3496
3497         pd  = uobj_get_obj_read(pd, cmd->pd_handle, file->ucontext);
3498         if (!pd) {
3499                 ret = -EINVAL;
3500                 goto err_put_cq;
3501         }
3502
3503         attr.event_handler  = ib_uverbs_srq_event_handler;
3504         attr.srq_context    = file;
3505         attr.srq_type       = cmd->srq_type;
3506         attr.attr.max_wr    = cmd->max_wr;
3507         attr.attr.max_sge   = cmd->max_sge;
3508         attr.attr.srq_limit = cmd->srq_limit;
3509
3510         obj->uevent.events_reported = 0;
3511         INIT_LIST_HEAD(&obj->uevent.event_list);
3512
3513         srq = pd->device->create_srq(pd, &attr, udata);
3514         if (IS_ERR(srq)) {
3515                 ret = PTR_ERR(srq);
3516                 goto err_put;
3517         }
3518
3519         srq->device        = pd->device;
3520         srq->pd            = pd;
3521         srq->srq_type      = cmd->srq_type;
3522         srq->uobject       = &obj->uevent.uobject;
3523         srq->event_handler = attr.event_handler;
3524         srq->srq_context   = attr.srq_context;
3525
3526         if (cmd->srq_type == IB_SRQT_XRC) {
3527                 srq->ext.xrc.cq   = attr.ext.xrc.cq;
3528                 srq->ext.xrc.xrcd = attr.ext.xrc.xrcd;
3529                 atomic_inc(&attr.ext.xrc.cq->usecnt);
3530                 atomic_inc(&attr.ext.xrc.xrcd->usecnt);
3531         }
3532
3533         atomic_inc(&pd->usecnt);
3534         atomic_set(&srq->usecnt, 0);
3535
3536         obj->uevent.uobject.object = srq;
3537         obj->uevent.uobject.user_handle = cmd->user_handle;
3538
3539         memset(&resp, 0, sizeof resp);
3540         resp.srq_handle = obj->uevent.uobject.id;
3541         resp.max_wr     = attr.attr.max_wr;
3542         resp.max_sge    = attr.attr.max_sge;
3543         if (cmd->srq_type == IB_SRQT_XRC)
3544                 resp.srqn = srq->ext.xrc.srq_num;
3545
3546         if (copy_to_user((void __user *) (unsigned long) cmd->response,
3547                          &resp, sizeof resp)) {
3548                 ret = -EFAULT;
3549                 goto err_copy;
3550         }
3551
3552         if (cmd->srq_type == IB_SRQT_XRC) {
3553                 uobj_put_read(xrcd_uobj);
3554                 uobj_put_obj_read(attr.ext.xrc.cq);
3555         }
3556         uobj_put_obj_read(pd);
3557         uobj_alloc_commit(&obj->uevent.uobject);
3558
3559         return 0;
3560
3561 err_copy:
3562         ib_destroy_srq(srq);
3563
3564 err_put:
3565         uobj_put_obj_read(pd);
3566
3567 err_put_cq:
3568         if (cmd->srq_type == IB_SRQT_XRC)
3569                 uobj_put_obj_read(attr.ext.xrc.cq);
3570
3571 err_put_xrcd:
3572         if (cmd->srq_type == IB_SRQT_XRC) {
3573                 atomic_dec(&obj->uxrcd->refcnt);
3574                 uobj_put_read(xrcd_uobj);
3575         }
3576
3577 err:
3578         uobj_alloc_abort(&obj->uevent.uobject);
3579         return ret;
3580 }
3581
3582 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
3583                              struct ib_device *ib_dev,
3584                              const char __user *buf, int in_len,
3585                              int out_len)
3586 {
3587         struct ib_uverbs_create_srq      cmd;
3588         struct ib_uverbs_create_xsrq     xcmd;
3589         struct ib_uverbs_create_srq_resp resp;
3590         struct ib_udata                  udata;
3591         int ret;
3592
3593         if (out_len < sizeof resp)
3594                 return -ENOSPC;
3595
3596         if (copy_from_user(&cmd, buf, sizeof cmd))
3597                 return -EFAULT;
3598
3599         xcmd.response    = cmd.response;
3600         xcmd.user_handle = cmd.user_handle;
3601         xcmd.srq_type    = IB_SRQT_BASIC;
3602         xcmd.pd_handle   = cmd.pd_handle;
3603         xcmd.max_wr      = cmd.max_wr;
3604         xcmd.max_sge     = cmd.max_sge;
3605         xcmd.srq_limit   = cmd.srq_limit;
3606
3607         INIT_UDATA(&udata, buf + sizeof cmd,
3608                    (unsigned long) cmd.response + sizeof resp,
3609                    in_len - sizeof cmd - sizeof(struct ib_uverbs_cmd_hdr),
3610                    out_len - sizeof resp);
3611
3612         ret = __uverbs_create_xsrq(file, ib_dev, &xcmd, &udata);
3613         if (ret)
3614                 return ret;
3615
3616         return in_len;
3617 }
3618
3619 ssize_t ib_uverbs_create_xsrq(struct ib_uverbs_file *file,
3620                               struct ib_device *ib_dev,
3621                               const char __user *buf, int in_len, int out_len)
3622 {
3623         struct ib_uverbs_create_xsrq     cmd;
3624         struct ib_uverbs_create_srq_resp resp;
3625         struct ib_udata                  udata;
3626         int ret;
3627
3628         if (out_len < sizeof resp)
3629                 return -ENOSPC;
3630
3631         if (copy_from_user(&cmd, buf, sizeof cmd))
3632                 return -EFAULT;
3633
3634         INIT_UDATA(&udata, buf + sizeof cmd,
3635                    (unsigned long) cmd.response + sizeof resp,
3636                    in_len - sizeof cmd - sizeof(struct ib_uverbs_cmd_hdr),
3637                    out_len - sizeof resp);
3638
3639         ret = __uverbs_create_xsrq(file, ib_dev, &cmd, &udata);
3640         if (ret)
3641                 return ret;
3642
3643         return in_len;
3644 }
3645
3646 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
3647                              struct ib_device *ib_dev,
3648                              const char __user *buf, int in_len,
3649                              int out_len)
3650 {
3651         struct ib_uverbs_modify_srq cmd;
3652         struct ib_udata             udata;
3653         struct ib_srq              *srq;
3654         struct ib_srq_attr          attr;
3655         int                         ret;
3656
3657         if (copy_from_user(&cmd, buf, sizeof cmd))
3658                 return -EFAULT;
3659
3660         INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
3661                    out_len);
3662
3663         srq = uobj_get_obj_read(srq, cmd.srq_handle, file->ucontext);
3664         if (!srq)
3665                 return -EINVAL;
3666
3667         attr.max_wr    = cmd.max_wr;
3668         attr.srq_limit = cmd.srq_limit;
3669
3670         ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata);
3671
3672         uobj_put_obj_read(srq);
3673
3674         return ret ? ret : in_len;
3675 }
3676
3677 ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
3678                             struct ib_device *ib_dev,
3679                             const char __user *buf,
3680                             int in_len, int out_len)
3681 {
3682         struct ib_uverbs_query_srq      cmd;
3683         struct ib_uverbs_query_srq_resp resp;
3684         struct ib_srq_attr              attr;
3685         struct ib_srq                   *srq;
3686         int                             ret;
3687
3688         if (out_len < sizeof resp)
3689                 return -ENOSPC;
3690
3691         if (copy_from_user(&cmd, buf, sizeof cmd))
3692                 return -EFAULT;
3693
3694         srq = uobj_get_obj_read(srq, cmd.srq_handle, file->ucontext);
3695         if (!srq)
3696                 return -EINVAL;
3697
3698         ret = ib_query_srq(srq, &attr);
3699
3700         uobj_put_obj_read(srq);
3701
3702         if (ret)
3703                 return ret;
3704
3705         memset(&resp, 0, sizeof resp);
3706
3707         resp.max_wr    = attr.max_wr;
3708         resp.max_sge   = attr.max_sge;
3709         resp.srq_limit = attr.srq_limit;
3710
3711         if (copy_to_user((void __user *) (unsigned long) cmd.response,
3712                          &resp, sizeof resp))
3713                 return -EFAULT;
3714
3715         return in_len;
3716 }
3717
3718 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
3719                               struct ib_device *ib_dev,
3720                               const char __user *buf, int in_len,
3721                               int out_len)
3722 {
3723         struct ib_uverbs_destroy_srq      cmd;
3724         struct ib_uverbs_destroy_srq_resp resp;
3725         struct ib_uobject                *uobj;
3726         struct ib_srq                    *srq;
3727         struct ib_uevent_object          *obj;
3728         int                               ret = -EINVAL;
3729         enum ib_srq_type                  srq_type;
3730
3731         if (copy_from_user(&cmd, buf, sizeof cmd))
3732                 return -EFAULT;
3733
3734         uobj  = uobj_get_write(uobj_get_type(srq), cmd.srq_handle,
3735                                file->ucontext);
3736         if (IS_ERR(uobj))
3737                 return PTR_ERR(uobj);
3738
3739         srq = uobj->object;
3740         obj = container_of(uobj, struct ib_uevent_object, uobject);
3741         srq_type = srq->srq_type;
3742         /*
3743          * Make sure we don't free the memory in remove_commit as we still
3744          * needs the uobject memory to create the response.
3745          */
3746         uverbs_uobject_get(uobj);
3747
3748         memset(&resp, 0, sizeof(resp));
3749
3750         ret = uobj_remove_commit(uobj);
3751         if (ret) {
3752                 uverbs_uobject_put(uobj);
3753                 return ret;
3754         }
3755         resp.events_reported = obj->events_reported;
3756         uverbs_uobject_put(uobj);
3757         if (copy_to_user((void __user *)(unsigned long)cmd.response,
3758                          &resp, sizeof(resp)))
3759                 return -EFAULT;
3760
3761         return in_len;
3762 }
3763
3764 int ib_uverbs_ex_query_device(struct ib_uverbs_file *file,
3765                               struct ib_device *ib_dev,
3766                               struct ib_udata *ucore,
3767                               struct ib_udata *uhw)
3768 {
3769         struct ib_uverbs_ex_query_device_resp resp = { {0} };
3770         struct ib_uverbs_ex_query_device  cmd;
3771         struct ib_device_attr attr = {0};
3772         int err;
3773
3774         if (ucore->inlen < sizeof(cmd))
3775                 return -EINVAL;
3776
3777         err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3778         if (err)
3779                 return err;
3780
3781         if (cmd.comp_mask)
3782                 return -EINVAL;
3783
3784         if (cmd.reserved)
3785                 return -EINVAL;
3786
3787         resp.response_length = offsetof(typeof(resp), odp_caps);
3788
3789         if (ucore->outlen < resp.response_length)
3790                 return -ENOSPC;
3791
3792         err = ib_dev->query_device(ib_dev, &attr, uhw);
3793         if (err)
3794                 return err;
3795
3796         copy_query_dev_fields(file, ib_dev, &resp.base, &attr);
3797
3798         if (ucore->outlen < resp.response_length + sizeof(resp.odp_caps))
3799                 goto end;
3800
3801 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
3802         resp.odp_caps.general_caps = attr.odp_caps.general_caps;
3803         resp.odp_caps.per_transport_caps.rc_odp_caps =
3804                 attr.odp_caps.per_transport_caps.rc_odp_caps;
3805         resp.odp_caps.per_transport_caps.uc_odp_caps =
3806                 attr.odp_caps.per_transport_caps.uc_odp_caps;
3807         resp.odp_caps.per_transport_caps.ud_odp_caps =
3808                 attr.odp_caps.per_transport_caps.ud_odp_caps;
3809 #endif
3810         resp.response_length += sizeof(resp.odp_caps);
3811
3812         if (ucore->outlen < resp.response_length + sizeof(resp.timestamp_mask))
3813                 goto end;
3814
3815         resp.timestamp_mask = attr.timestamp_mask;
3816         resp.response_length += sizeof(resp.timestamp_mask);
3817
3818         if (ucore->outlen < resp.response_length + sizeof(resp.hca_core_clock))
3819                 goto end;
3820
3821         resp.hca_core_clock = attr.hca_core_clock;
3822         resp.response_length += sizeof(resp.hca_core_clock);
3823
3824         if (ucore->outlen < resp.response_length + sizeof(resp.device_cap_flags_ex))
3825                 goto end;
3826
3827         resp.device_cap_flags_ex = attr.device_cap_flags;
3828         resp.response_length += sizeof(resp.device_cap_flags_ex);
3829
3830         if (ucore->outlen < resp.response_length + sizeof(resp.rss_caps))
3831                 goto end;
3832
3833         resp.rss_caps.supported_qpts = attr.rss_caps.supported_qpts;
3834         resp.rss_caps.max_rwq_indirection_tables =
3835                 attr.rss_caps.max_rwq_indirection_tables;
3836         resp.rss_caps.max_rwq_indirection_table_size =
3837                 attr.rss_caps.max_rwq_indirection_table_size;
3838
3839         resp.response_length += sizeof(resp.rss_caps);
3840
3841         if (ucore->outlen < resp.response_length + sizeof(resp.max_wq_type_rq))
3842                 goto end;
3843
3844         resp.max_wq_type_rq = attr.max_wq_type_rq;
3845         resp.response_length += sizeof(resp.max_wq_type_rq);
3846
3847         if (ucore->outlen < resp.response_length + sizeof(resp.raw_packet_caps))
3848                 goto end;
3849
3850         resp.raw_packet_caps = attr.raw_packet_caps;
3851         resp.response_length += sizeof(resp.raw_packet_caps);
3852 end:
3853         err = ib_copy_to_udata(ucore, &resp, resp.response_length);
3854         return err;
3855 }