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         attr->ah_attr.type = rdma_ah_find_type(qp->device,
1958                                                cmd->base.dest.port_num);
1959         if (cmd->base.dest.is_global) {
1960                 rdma_ah_set_grh(&attr->ah_attr, NULL,
1961                                 cmd->base.dest.flow_label,
1962                                 cmd->base.dest.sgid_index,
1963                                 cmd->base.dest.hop_limit,
1964                                 cmd->base.dest.traffic_class);
1965                 rdma_ah_set_dgid_raw(&attr->ah_attr, cmd->base.dest.dgid);
1966         } else {
1967                 rdma_ah_set_ah_flags(&attr->ah_attr, 0);
1968         }
1969         rdma_ah_set_dlid(&attr->ah_attr, cmd->base.dest.dlid);
1970         rdma_ah_set_sl(&attr->ah_attr, cmd->base.dest.sl);
1971         rdma_ah_set_path_bits(&attr->ah_attr, cmd->base.dest.src_path_bits);
1972         rdma_ah_set_static_rate(&attr->ah_attr, cmd->base.dest.static_rate);
1973         rdma_ah_set_port_num(&attr->ah_attr,
1974                              cmd->base.dest.port_num);
1975
1976         attr->alt_ah_attr.type = rdma_ah_find_type(qp->device,
1977                                                    cmd->base.dest.port_num);
1978         if (cmd->base.alt_dest.is_global) {
1979                 rdma_ah_set_grh(&attr->alt_ah_attr, NULL,
1980                                 cmd->base.alt_dest.flow_label,
1981                                 cmd->base.alt_dest.sgid_index,
1982                                 cmd->base.alt_dest.hop_limit,
1983                                 cmd->base.alt_dest.traffic_class);
1984                 rdma_ah_set_dgid_raw(&attr->alt_ah_attr,
1985                                      cmd->base.alt_dest.dgid);
1986         } else {
1987                 rdma_ah_set_ah_flags(&attr->alt_ah_attr, 0);
1988         }
1989
1990         rdma_ah_set_dlid(&attr->alt_ah_attr, cmd->base.alt_dest.dlid);
1991         rdma_ah_set_sl(&attr->alt_ah_attr, cmd->base.alt_dest.sl);
1992         rdma_ah_set_path_bits(&attr->alt_ah_attr,
1993                               cmd->base.alt_dest.src_path_bits);
1994         rdma_ah_set_static_rate(&attr->alt_ah_attr,
1995                                 cmd->base.alt_dest.static_rate);
1996         rdma_ah_set_port_num(&attr->alt_ah_attr,
1997                              cmd->base.alt_dest.port_num);
1998
1999         if (qp->real_qp == qp) {
2000                 if (cmd->base.attr_mask & IB_QP_AV) {
2001                         ret = ib_resolve_eth_dmac(qp->device, &attr->ah_attr);
2002                         if (ret)
2003                                 goto release_qp;
2004                 }
2005                 ret = qp->device->modify_qp(qp, attr,
2006                                             modify_qp_mask(qp->qp_type,
2007                                                            cmd->base.attr_mask),
2008                                             udata);
2009         } else {
2010                 ret = ib_modify_qp(qp, attr,
2011                                    modify_qp_mask(qp->qp_type,
2012                                                   cmd->base.attr_mask));
2013         }
2014
2015 release_qp:
2016         uobj_put_obj_read(qp);
2017
2018 out:
2019         kfree(attr);
2020
2021         return ret;
2022 }
2023
2024 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
2025                             struct ib_device *ib_dev,
2026                             const char __user *buf, int in_len,
2027                             int out_len)
2028 {
2029         struct ib_uverbs_ex_modify_qp cmd = {};
2030         struct ib_udata udata;
2031         int ret;
2032
2033         if (copy_from_user(&cmd.base, buf, sizeof(cmd.base)))
2034                 return -EFAULT;
2035
2036         if (cmd.base.attr_mask &
2037             ~((IB_USER_LEGACY_LAST_QP_ATTR_MASK << 1) - 1))
2038                 return -EOPNOTSUPP;
2039
2040         INIT_UDATA(&udata, buf + sizeof(cmd.base), NULL,
2041                    in_len - sizeof(cmd.base), out_len);
2042
2043         ret = modify_qp(file, &cmd, &udata);
2044         if (ret)
2045                 return ret;
2046
2047         return in_len;
2048 }
2049
2050 int ib_uverbs_ex_modify_qp(struct ib_uverbs_file *file,
2051                            struct ib_device *ib_dev,
2052                            struct ib_udata *ucore,
2053                            struct ib_udata *uhw)
2054 {
2055         struct ib_uverbs_ex_modify_qp cmd = {};
2056         int ret;
2057
2058         /*
2059          * Last bit is reserved for extending the attr_mask by
2060          * using another field.
2061          */
2062         BUILD_BUG_ON(IB_USER_LAST_QP_ATTR_MASK == (1 << 31));
2063
2064         if (ucore->inlen < sizeof(cmd.base))
2065                 return -EINVAL;
2066
2067         ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
2068         if (ret)
2069                 return ret;
2070
2071         if (cmd.base.attr_mask &
2072             ~((IB_USER_LAST_QP_ATTR_MASK << 1) - 1))
2073                 return -EOPNOTSUPP;
2074
2075         if (ucore->inlen > sizeof(cmd)) {
2076                 if (ib_is_udata_cleared(ucore, sizeof(cmd),
2077                                         ucore->inlen - sizeof(cmd)))
2078                         return -EOPNOTSUPP;
2079         }
2080
2081         ret = modify_qp(file, &cmd, uhw);
2082
2083         return ret;
2084 }
2085
2086 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
2087                              struct ib_device *ib_dev,
2088                              const char __user *buf, int in_len,
2089                              int out_len)
2090 {
2091         struct ib_uverbs_destroy_qp      cmd;
2092         struct ib_uverbs_destroy_qp_resp resp;
2093         struct ib_uobject               *uobj;
2094         struct ib_qp                    *qp;
2095         struct ib_uqp_object            *obj;
2096         int                              ret = -EINVAL;
2097
2098         if (copy_from_user(&cmd, buf, sizeof cmd))
2099                 return -EFAULT;
2100
2101         memset(&resp, 0, sizeof resp);
2102
2103         uobj  = uobj_get_write(uobj_get_type(qp), cmd.qp_handle,
2104                                file->ucontext);
2105         if (IS_ERR(uobj))
2106                 return PTR_ERR(uobj);
2107
2108         qp  = uobj->object;
2109         obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
2110         /*
2111          * Make sure we don't free the memory in remove_commit as we still
2112          * needs the uobject memory to create the response.
2113          */
2114         uverbs_uobject_get(uobj);
2115
2116         ret = uobj_remove_commit(uobj);
2117         if (ret) {
2118                 uverbs_uobject_put(uobj);
2119                 return ret;
2120         }
2121
2122         resp.events_reported = obj->uevent.events_reported;
2123         uverbs_uobject_put(uobj);
2124
2125         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2126                          &resp, sizeof resp))
2127                 return -EFAULT;
2128
2129         return in_len;
2130 }
2131
2132 static void *alloc_wr(size_t wr_size, __u32 num_sge)
2133 {
2134         if (num_sge >= (U32_MAX - ALIGN(wr_size, sizeof (struct ib_sge))) /
2135                        sizeof (struct ib_sge))
2136                 return NULL;
2137
2138         return kmalloc(ALIGN(wr_size, sizeof (struct ib_sge)) +
2139                          num_sge * sizeof (struct ib_sge), GFP_KERNEL);
2140 }
2141
2142 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
2143                             struct ib_device *ib_dev,
2144                             const char __user *buf, int in_len,
2145                             int out_len)
2146 {
2147         struct ib_uverbs_post_send      cmd;
2148         struct ib_uverbs_post_send_resp resp;
2149         struct ib_uverbs_send_wr       *user_wr;
2150         struct ib_send_wr              *wr = NULL, *last, *next, *bad_wr;
2151         struct ib_qp                   *qp;
2152         int                             i, sg_ind;
2153         int                             is_ud;
2154         ssize_t                         ret = -EINVAL;
2155         size_t                          next_size;
2156
2157         if (copy_from_user(&cmd, buf, sizeof cmd))
2158                 return -EFAULT;
2159
2160         if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
2161             cmd.sge_count * sizeof (struct ib_uverbs_sge))
2162                 return -EINVAL;
2163
2164         if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
2165                 return -EINVAL;
2166
2167         user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
2168         if (!user_wr)
2169                 return -ENOMEM;
2170
2171         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
2172         if (!qp)
2173                 goto out;
2174
2175         is_ud = qp->qp_type == IB_QPT_UD;
2176         sg_ind = 0;
2177         last = NULL;
2178         for (i = 0; i < cmd.wr_count; ++i) {
2179                 if (copy_from_user(user_wr,
2180                                    buf + sizeof cmd + i * cmd.wqe_size,
2181                                    cmd.wqe_size)) {
2182                         ret = -EFAULT;
2183                         goto out_put;
2184                 }
2185
2186                 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
2187                         ret = -EINVAL;
2188                         goto out_put;
2189                 }
2190
2191                 if (is_ud) {
2192                         struct ib_ud_wr *ud;
2193
2194                         if (user_wr->opcode != IB_WR_SEND &&
2195                             user_wr->opcode != IB_WR_SEND_WITH_IMM) {
2196                                 ret = -EINVAL;
2197                                 goto out_put;
2198                         }
2199
2200                         next_size = sizeof(*ud);
2201                         ud = alloc_wr(next_size, user_wr->num_sge);
2202                         if (!ud) {
2203                                 ret = -ENOMEM;
2204                                 goto out_put;
2205                         }
2206
2207                         ud->ah = uobj_get_obj_read(ah, user_wr->wr.ud.ah,
2208                                                    file->ucontext);
2209                         if (!ud->ah) {
2210                                 kfree(ud);
2211                                 ret = -EINVAL;
2212                                 goto out_put;
2213                         }
2214                         ud->remote_qpn = user_wr->wr.ud.remote_qpn;
2215                         ud->remote_qkey = user_wr->wr.ud.remote_qkey;
2216
2217                         next = &ud->wr;
2218                 } else if (user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM ||
2219                            user_wr->opcode == IB_WR_RDMA_WRITE ||
2220                            user_wr->opcode == IB_WR_RDMA_READ) {
2221                         struct ib_rdma_wr *rdma;
2222
2223                         next_size = sizeof(*rdma);
2224                         rdma = alloc_wr(next_size, user_wr->num_sge);
2225                         if (!rdma) {
2226                                 ret = -ENOMEM;
2227                                 goto out_put;
2228                         }
2229
2230                         rdma->remote_addr = user_wr->wr.rdma.remote_addr;
2231                         rdma->rkey = user_wr->wr.rdma.rkey;
2232
2233                         next = &rdma->wr;
2234                 } else if (user_wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP ||
2235                            user_wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) {
2236                         struct ib_atomic_wr *atomic;
2237
2238                         next_size = sizeof(*atomic);
2239                         atomic = alloc_wr(next_size, user_wr->num_sge);
2240                         if (!atomic) {
2241                                 ret = -ENOMEM;
2242                                 goto out_put;
2243                         }
2244
2245                         atomic->remote_addr = user_wr->wr.atomic.remote_addr;
2246                         atomic->compare_add = user_wr->wr.atomic.compare_add;
2247                         atomic->swap = user_wr->wr.atomic.swap;
2248                         atomic->rkey = user_wr->wr.atomic.rkey;
2249
2250                         next = &atomic->wr;
2251                 } else if (user_wr->opcode == IB_WR_SEND ||
2252                            user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2253                            user_wr->opcode == IB_WR_SEND_WITH_INV) {
2254                         next_size = sizeof(*next);
2255                         next = alloc_wr(next_size, user_wr->num_sge);
2256                         if (!next) {
2257                                 ret = -ENOMEM;
2258                                 goto out_put;
2259                         }
2260                 } else {
2261                         ret = -EINVAL;
2262                         goto out_put;
2263                 }
2264
2265                 if (user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2266                     user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) {
2267                         next->ex.imm_data =
2268                                         (__be32 __force) user_wr->ex.imm_data;
2269                 } else if (user_wr->opcode == IB_WR_SEND_WITH_INV) {
2270                         next->ex.invalidate_rkey = user_wr->ex.invalidate_rkey;
2271                 }
2272
2273                 if (!last)
2274                         wr = next;
2275                 else
2276                         last->next = next;
2277                 last = next;
2278
2279                 next->next       = NULL;
2280                 next->wr_id      = user_wr->wr_id;
2281                 next->num_sge    = user_wr->num_sge;
2282                 next->opcode     = user_wr->opcode;
2283                 next->send_flags = user_wr->send_flags;
2284
2285                 if (next->num_sge) {
2286                         next->sg_list = (void *) next +
2287                                 ALIGN(next_size, sizeof(struct ib_sge));
2288                         if (copy_from_user(next->sg_list,
2289                                            buf + sizeof cmd +
2290                                            cmd.wr_count * cmd.wqe_size +
2291                                            sg_ind * sizeof (struct ib_sge),
2292                                            next->num_sge * sizeof (struct ib_sge))) {
2293                                 ret = -EFAULT;
2294                                 goto out_put;
2295                         }
2296                         sg_ind += next->num_sge;
2297                 } else
2298                         next->sg_list = NULL;
2299         }
2300
2301         resp.bad_wr = 0;
2302         ret = qp->device->post_send(qp->real_qp, wr, &bad_wr);
2303         if (ret)
2304                 for (next = wr; next; next = next->next) {
2305                         ++resp.bad_wr;
2306                         if (next == bad_wr)
2307                                 break;
2308                 }
2309
2310         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2311                          &resp, sizeof resp))
2312                 ret = -EFAULT;
2313
2314 out_put:
2315         uobj_put_obj_read(qp);
2316
2317         while (wr) {
2318                 if (is_ud && ud_wr(wr)->ah)
2319                         uobj_put_obj_read(ud_wr(wr)->ah);
2320                 next = wr->next;
2321                 kfree(wr);
2322                 wr = next;
2323         }
2324
2325 out:
2326         kfree(user_wr);
2327
2328         return ret ? ret : in_len;
2329 }
2330
2331 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
2332                                                     int in_len,
2333                                                     u32 wr_count,
2334                                                     u32 sge_count,
2335                                                     u32 wqe_size)
2336 {
2337         struct ib_uverbs_recv_wr *user_wr;
2338         struct ib_recv_wr        *wr = NULL, *last, *next;
2339         int                       sg_ind;
2340         int                       i;
2341         int                       ret;
2342
2343         if (in_len < wqe_size * wr_count +
2344             sge_count * sizeof (struct ib_uverbs_sge))
2345                 return ERR_PTR(-EINVAL);
2346
2347         if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
2348                 return ERR_PTR(-EINVAL);
2349
2350         user_wr = kmalloc(wqe_size, GFP_KERNEL);
2351         if (!user_wr)
2352                 return ERR_PTR(-ENOMEM);
2353
2354         sg_ind = 0;
2355         last = NULL;
2356         for (i = 0; i < wr_count; ++i) {
2357                 if (copy_from_user(user_wr, buf + i * wqe_size,
2358                                    wqe_size)) {
2359                         ret = -EFAULT;
2360                         goto err;
2361                 }
2362
2363                 if (user_wr->num_sge + sg_ind > sge_count) {
2364                         ret = -EINVAL;
2365                         goto err;
2366                 }
2367
2368                 if (user_wr->num_sge >=
2369                     (U32_MAX - ALIGN(sizeof *next, sizeof (struct ib_sge))) /
2370                     sizeof (struct ib_sge)) {
2371                         ret = -EINVAL;
2372                         goto err;
2373                 }
2374
2375                 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2376                                user_wr->num_sge * sizeof (struct ib_sge),
2377                                GFP_KERNEL);
2378                 if (!next) {
2379                         ret = -ENOMEM;
2380                         goto err;
2381                 }
2382
2383                 if (!last)
2384                         wr = next;
2385                 else
2386                         last->next = next;
2387                 last = next;
2388
2389                 next->next       = NULL;
2390                 next->wr_id      = user_wr->wr_id;
2391                 next->num_sge    = user_wr->num_sge;
2392
2393                 if (next->num_sge) {
2394                         next->sg_list = (void *) next +
2395                                 ALIGN(sizeof *next, sizeof (struct ib_sge));
2396                         if (copy_from_user(next->sg_list,
2397                                            buf + wr_count * wqe_size +
2398                                            sg_ind * sizeof (struct ib_sge),
2399                                            next->num_sge * sizeof (struct ib_sge))) {
2400                                 ret = -EFAULT;
2401                                 goto err;
2402                         }
2403                         sg_ind += next->num_sge;
2404                 } else
2405                         next->sg_list = NULL;
2406         }
2407
2408         kfree(user_wr);
2409         return wr;
2410
2411 err:
2412         kfree(user_wr);
2413
2414         while (wr) {
2415                 next = wr->next;
2416                 kfree(wr);
2417                 wr = next;
2418         }
2419
2420         return ERR_PTR(ret);
2421 }
2422
2423 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
2424                             struct ib_device *ib_dev,
2425                             const char __user *buf, int in_len,
2426                             int out_len)
2427 {
2428         struct ib_uverbs_post_recv      cmd;
2429         struct ib_uverbs_post_recv_resp resp;
2430         struct ib_recv_wr              *wr, *next, *bad_wr;
2431         struct ib_qp                   *qp;
2432         ssize_t                         ret = -EINVAL;
2433
2434         if (copy_from_user(&cmd, buf, sizeof cmd))
2435                 return -EFAULT;
2436
2437         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2438                                        in_len - sizeof cmd, cmd.wr_count,
2439                                        cmd.sge_count, cmd.wqe_size);
2440         if (IS_ERR(wr))
2441                 return PTR_ERR(wr);
2442
2443         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
2444         if (!qp)
2445                 goto out;
2446
2447         resp.bad_wr = 0;
2448         ret = qp->device->post_recv(qp->real_qp, wr, &bad_wr);
2449
2450         uobj_put_obj_read(qp);
2451         if (ret) {
2452                 for (next = wr; next; next = next->next) {
2453                         ++resp.bad_wr;
2454                         if (next == bad_wr)
2455                                 break;
2456                 }
2457         }
2458
2459         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2460                          &resp, sizeof resp))
2461                 ret = -EFAULT;
2462
2463 out:
2464         while (wr) {
2465                 next = wr->next;
2466                 kfree(wr);
2467                 wr = next;
2468         }
2469
2470         return ret ? ret : in_len;
2471 }
2472
2473 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
2474                                 struct ib_device *ib_dev,
2475                                 const char __user *buf, int in_len,
2476                                 int out_len)
2477 {
2478         struct ib_uverbs_post_srq_recv      cmd;
2479         struct ib_uverbs_post_srq_recv_resp resp;
2480         struct ib_recv_wr                  *wr, *next, *bad_wr;
2481         struct ib_srq                      *srq;
2482         ssize_t                             ret = -EINVAL;
2483
2484         if (copy_from_user(&cmd, buf, sizeof cmd))
2485                 return -EFAULT;
2486
2487         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2488                                        in_len - sizeof cmd, cmd.wr_count,
2489                                        cmd.sge_count, cmd.wqe_size);
2490         if (IS_ERR(wr))
2491                 return PTR_ERR(wr);
2492
2493         srq = uobj_get_obj_read(srq, cmd.srq_handle, file->ucontext);
2494         if (!srq)
2495                 goto out;
2496
2497         resp.bad_wr = 0;
2498         ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
2499
2500         uobj_put_obj_read(srq);
2501
2502         if (ret)
2503                 for (next = wr; next; next = next->next) {
2504                         ++resp.bad_wr;
2505                         if (next == bad_wr)
2506                                 break;
2507                 }
2508
2509         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2510                          &resp, sizeof resp))
2511                 ret = -EFAULT;
2512
2513 out:
2514         while (wr) {
2515                 next = wr->next;
2516                 kfree(wr);
2517                 wr = next;
2518         }
2519
2520         return ret ? ret : in_len;
2521 }
2522
2523 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
2524                             struct ib_device *ib_dev,
2525                             const char __user *buf, int in_len,
2526                             int out_len)
2527 {
2528         struct ib_uverbs_create_ah       cmd;
2529         struct ib_uverbs_create_ah_resp  resp;
2530         struct ib_uobject               *uobj;
2531         struct ib_pd                    *pd;
2532         struct ib_ah                    *ah;
2533         struct rdma_ah_attr             attr;
2534         int ret;
2535         struct ib_udata                   udata;
2536         u8                              *dmac;
2537
2538         if (out_len < sizeof resp)
2539                 return -ENOSPC;
2540
2541         if (copy_from_user(&cmd, buf, sizeof cmd))
2542                 return -EFAULT;
2543
2544         INIT_UDATA(&udata, buf + sizeof(cmd),
2545                    (unsigned long)cmd.response + sizeof(resp),
2546                    in_len - sizeof(cmd), out_len - sizeof(resp));
2547
2548         uobj  = uobj_alloc(uobj_get_type(ah), file->ucontext);
2549         if (IS_ERR(uobj))
2550                 return PTR_ERR(uobj);
2551
2552         pd = uobj_get_obj_read(pd, cmd.pd_handle, file->ucontext);
2553         if (!pd) {
2554                 ret = -EINVAL;
2555                 goto err;
2556         }
2557
2558         attr.type = rdma_ah_find_type(ib_dev, cmd.attr.port_num);
2559         rdma_ah_set_dlid(&attr, cmd.attr.dlid);
2560         rdma_ah_set_sl(&attr, cmd.attr.sl);
2561         rdma_ah_set_path_bits(&attr, cmd.attr.src_path_bits);
2562         rdma_ah_set_static_rate(&attr, cmd.attr.static_rate);
2563         rdma_ah_set_port_num(&attr, cmd.attr.port_num);
2564
2565         if (cmd.attr.is_global) {
2566                 rdma_ah_set_grh(&attr, NULL, cmd.attr.grh.flow_label,
2567                                 cmd.attr.grh.sgid_index,
2568                                 cmd.attr.grh.hop_limit,
2569                                 cmd.attr.grh.traffic_class);
2570                 rdma_ah_set_dgid_raw(&attr, cmd.attr.grh.dgid);
2571         } else {
2572                 rdma_ah_set_ah_flags(&attr, 0);
2573         }
2574         dmac = rdma_ah_retrieve_dmac(&attr);
2575         if (dmac)
2576                 memset(dmac, 0, ETH_ALEN);
2577
2578         ah = pd->device->create_ah(pd, &attr, &udata);
2579
2580         if (IS_ERR(ah)) {
2581                 ret = PTR_ERR(ah);
2582                 goto err_put;
2583         }
2584
2585         ah->device  = pd->device;
2586         ah->pd      = pd;
2587         atomic_inc(&pd->usecnt);
2588         ah->uobject  = uobj;
2589         uobj->user_handle = cmd.user_handle;
2590         uobj->object = ah;
2591
2592         resp.ah_handle = uobj->id;
2593
2594         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2595                          &resp, sizeof resp)) {
2596                 ret = -EFAULT;
2597                 goto err_copy;
2598         }
2599
2600         uobj_put_obj_read(pd);
2601         uobj_alloc_commit(uobj);
2602
2603         return in_len;
2604
2605 err_copy:
2606         rdma_destroy_ah(ah);
2607
2608 err_put:
2609         uobj_put_obj_read(pd);
2610
2611 err:
2612         uobj_alloc_abort(uobj);
2613         return ret;
2614 }
2615
2616 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
2617                              struct ib_device *ib_dev,
2618                              const char __user *buf, int in_len, int out_len)
2619 {
2620         struct ib_uverbs_destroy_ah cmd;
2621         struct ib_uobject          *uobj;
2622         int                         ret;
2623
2624         if (copy_from_user(&cmd, buf, sizeof cmd))
2625                 return -EFAULT;
2626
2627         uobj  = uobj_get_write(uobj_get_type(ah), cmd.ah_handle,
2628                                file->ucontext);
2629         if (IS_ERR(uobj))
2630                 return PTR_ERR(uobj);
2631
2632         ret = uobj_remove_commit(uobj);
2633         return ret ?: in_len;
2634 }
2635
2636 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
2637                                struct ib_device *ib_dev,
2638                                const char __user *buf, int in_len,
2639                                int out_len)
2640 {
2641         struct ib_uverbs_attach_mcast cmd;
2642         struct ib_qp                 *qp;
2643         struct ib_uqp_object         *obj;
2644         struct ib_uverbs_mcast_entry *mcast;
2645         int                           ret;
2646
2647         if (copy_from_user(&cmd, buf, sizeof cmd))
2648                 return -EFAULT;
2649
2650         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
2651         if (!qp)
2652                 return -EINVAL;
2653
2654         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2655
2656         mutex_lock(&obj->mcast_lock);
2657         list_for_each_entry(mcast, &obj->mcast_list, list)
2658                 if (cmd.mlid == mcast->lid &&
2659                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2660                         ret = 0;
2661                         goto out_put;
2662                 }
2663
2664         mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
2665         if (!mcast) {
2666                 ret = -ENOMEM;
2667                 goto out_put;
2668         }
2669
2670         mcast->lid = cmd.mlid;
2671         memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
2672
2673         ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
2674         if (!ret)
2675                 list_add_tail(&mcast->list, &obj->mcast_list);
2676         else
2677                 kfree(mcast);
2678
2679 out_put:
2680         mutex_unlock(&obj->mcast_lock);
2681         uobj_put_obj_read(qp);
2682
2683         return ret ? ret : in_len;
2684 }
2685
2686 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
2687                                struct ib_device *ib_dev,
2688                                const char __user *buf, int in_len,
2689                                int out_len)
2690 {
2691         struct ib_uverbs_detach_mcast cmd;
2692         struct ib_uqp_object         *obj;
2693         struct ib_qp                 *qp;
2694         struct ib_uverbs_mcast_entry *mcast;
2695         int                           ret = -EINVAL;
2696         bool                          found = false;
2697
2698         if (copy_from_user(&cmd, buf, sizeof cmd))
2699                 return -EFAULT;
2700
2701         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
2702         if (!qp)
2703                 return -EINVAL;
2704
2705         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2706         mutex_lock(&obj->mcast_lock);
2707
2708         list_for_each_entry(mcast, &obj->mcast_list, list)
2709                 if (cmd.mlid == mcast->lid &&
2710                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2711                         list_del(&mcast->list);
2712                         kfree(mcast);
2713                         found = true;
2714                         break;
2715                 }
2716
2717         if (!found) {
2718                 ret = -EINVAL;
2719                 goto out_put;
2720         }
2721
2722         ret = ib_detach_mcast(qp, (union ib_gid *)cmd.gid, cmd.mlid);
2723
2724 out_put:
2725         mutex_unlock(&obj->mcast_lock);
2726         uobj_put_obj_read(qp);
2727         return ret ? ret : in_len;
2728 }
2729
2730 static int kern_spec_to_ib_spec_action(struct ib_uverbs_flow_spec *kern_spec,
2731                                        union ib_flow_spec *ib_spec)
2732 {
2733         ib_spec->type = kern_spec->type;
2734         switch (ib_spec->type) {
2735         case IB_FLOW_SPEC_ACTION_TAG:
2736                 if (kern_spec->flow_tag.size !=
2737                     sizeof(struct ib_uverbs_flow_spec_action_tag))
2738                         return -EINVAL;
2739
2740                 ib_spec->flow_tag.size = sizeof(struct ib_flow_spec_action_tag);
2741                 ib_spec->flow_tag.tag_id = kern_spec->flow_tag.tag_id;
2742                 break;
2743         case IB_FLOW_SPEC_ACTION_DROP:
2744                 if (kern_spec->drop.size !=
2745                     sizeof(struct ib_uverbs_flow_spec_action_drop))
2746                         return -EINVAL;
2747
2748                 ib_spec->drop.size = sizeof(struct ib_flow_spec_action_drop);
2749                 break;
2750         default:
2751                 return -EINVAL;
2752         }
2753         return 0;
2754 }
2755
2756 static size_t kern_spec_filter_sz(struct ib_uverbs_flow_spec_hdr *spec)
2757 {
2758         /* Returns user space filter size, includes padding */
2759         return (spec->size - sizeof(struct ib_uverbs_flow_spec_hdr)) / 2;
2760 }
2761
2762 static ssize_t spec_filter_size(void *kern_spec_filter, u16 kern_filter_size,
2763                                 u16 ib_real_filter_sz)
2764 {
2765         /*
2766          * User space filter structures must be 64 bit aligned, otherwise this
2767          * may pass, but we won't handle additional new attributes.
2768          */
2769
2770         if (kern_filter_size > ib_real_filter_sz) {
2771                 if (memchr_inv(kern_spec_filter +
2772                                ib_real_filter_sz, 0,
2773                                kern_filter_size - ib_real_filter_sz))
2774                         return -EINVAL;
2775                 return ib_real_filter_sz;
2776         }
2777         return kern_filter_size;
2778 }
2779
2780 static int kern_spec_to_ib_spec_filter(struct ib_uverbs_flow_spec *kern_spec,
2781                                        union ib_flow_spec *ib_spec)
2782 {
2783         ssize_t actual_filter_sz;
2784         ssize_t kern_filter_sz;
2785         ssize_t ib_filter_sz;
2786         void *kern_spec_mask;
2787         void *kern_spec_val;
2788
2789         if (kern_spec->reserved)
2790                 return -EINVAL;
2791
2792         ib_spec->type = kern_spec->type;
2793
2794         kern_filter_sz = kern_spec_filter_sz(&kern_spec->hdr);
2795         /* User flow spec size must be aligned to 4 bytes */
2796         if (kern_filter_sz != ALIGN(kern_filter_sz, 4))
2797                 return -EINVAL;
2798
2799         kern_spec_val = (void *)kern_spec +
2800                 sizeof(struct ib_uverbs_flow_spec_hdr);
2801         kern_spec_mask = kern_spec_val + kern_filter_sz;
2802         if (ib_spec->type == (IB_FLOW_SPEC_INNER | IB_FLOW_SPEC_VXLAN_TUNNEL))
2803                 return -EINVAL;
2804
2805         switch (ib_spec->type & ~IB_FLOW_SPEC_INNER) {
2806         case IB_FLOW_SPEC_ETH:
2807                 ib_filter_sz = offsetof(struct ib_flow_eth_filter, real_sz);
2808                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2809                                                     kern_filter_sz,
2810                                                     ib_filter_sz);
2811                 if (actual_filter_sz <= 0)
2812                         return -EINVAL;
2813                 ib_spec->size = sizeof(struct ib_flow_spec_eth);
2814                 memcpy(&ib_spec->eth.val, kern_spec_val, actual_filter_sz);
2815                 memcpy(&ib_spec->eth.mask, kern_spec_mask, actual_filter_sz);
2816                 break;
2817         case IB_FLOW_SPEC_IPV4:
2818                 ib_filter_sz = offsetof(struct ib_flow_ipv4_filter, real_sz);
2819                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2820                                                     kern_filter_sz,
2821                                                     ib_filter_sz);
2822                 if (actual_filter_sz <= 0)
2823                         return -EINVAL;
2824                 ib_spec->size = sizeof(struct ib_flow_spec_ipv4);
2825                 memcpy(&ib_spec->ipv4.val, kern_spec_val, actual_filter_sz);
2826                 memcpy(&ib_spec->ipv4.mask, kern_spec_mask, actual_filter_sz);
2827                 break;
2828         case IB_FLOW_SPEC_IPV6:
2829                 ib_filter_sz = offsetof(struct ib_flow_ipv6_filter, real_sz);
2830                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2831                                                     kern_filter_sz,
2832                                                     ib_filter_sz);
2833                 if (actual_filter_sz <= 0)
2834                         return -EINVAL;
2835                 ib_spec->size = sizeof(struct ib_flow_spec_ipv6);
2836                 memcpy(&ib_spec->ipv6.val, kern_spec_val, actual_filter_sz);
2837                 memcpy(&ib_spec->ipv6.mask, kern_spec_mask, actual_filter_sz);
2838
2839                 if ((ntohl(ib_spec->ipv6.mask.flow_label)) >= BIT(20) ||
2840                     (ntohl(ib_spec->ipv6.val.flow_label)) >= BIT(20))
2841                         return -EINVAL;
2842                 break;
2843         case IB_FLOW_SPEC_TCP:
2844         case IB_FLOW_SPEC_UDP:
2845                 ib_filter_sz = offsetof(struct ib_flow_tcp_udp_filter, real_sz);
2846                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2847                                                     kern_filter_sz,
2848                                                     ib_filter_sz);
2849                 if (actual_filter_sz <= 0)
2850                         return -EINVAL;
2851                 ib_spec->size = sizeof(struct ib_flow_spec_tcp_udp);
2852                 memcpy(&ib_spec->tcp_udp.val, kern_spec_val, actual_filter_sz);
2853                 memcpy(&ib_spec->tcp_udp.mask, kern_spec_mask, actual_filter_sz);
2854                 break;
2855         case IB_FLOW_SPEC_VXLAN_TUNNEL:
2856                 ib_filter_sz = offsetof(struct ib_flow_tunnel_filter, real_sz);
2857                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2858                                                     kern_filter_sz,
2859                                                     ib_filter_sz);
2860                 if (actual_filter_sz <= 0)
2861                         return -EINVAL;
2862                 ib_spec->tunnel.size = sizeof(struct ib_flow_spec_tunnel);
2863                 memcpy(&ib_spec->tunnel.val, kern_spec_val, actual_filter_sz);
2864                 memcpy(&ib_spec->tunnel.mask, kern_spec_mask, actual_filter_sz);
2865
2866                 if ((ntohl(ib_spec->tunnel.mask.tunnel_id)) >= BIT(24) ||
2867                     (ntohl(ib_spec->tunnel.val.tunnel_id)) >= BIT(24))
2868                         return -EINVAL;
2869                 break;
2870         default:
2871                 return -EINVAL;
2872         }
2873         return 0;
2874 }
2875
2876 static int kern_spec_to_ib_spec(struct ib_uverbs_flow_spec *kern_spec,
2877                                 union ib_flow_spec *ib_spec)
2878 {
2879         if (kern_spec->reserved)
2880                 return -EINVAL;
2881
2882         if (kern_spec->type >= IB_FLOW_SPEC_ACTION_TAG)
2883                 return kern_spec_to_ib_spec_action(kern_spec, ib_spec);
2884         else
2885                 return kern_spec_to_ib_spec_filter(kern_spec, ib_spec);
2886 }
2887
2888 int ib_uverbs_ex_create_wq(struct ib_uverbs_file *file,
2889                            struct ib_device *ib_dev,
2890                            struct ib_udata *ucore,
2891                            struct ib_udata *uhw)
2892 {
2893         struct ib_uverbs_ex_create_wq     cmd = {};
2894         struct ib_uverbs_ex_create_wq_resp resp = {};
2895         struct ib_uwq_object           *obj;
2896         int err = 0;
2897         struct ib_cq *cq;
2898         struct ib_pd *pd;
2899         struct ib_wq *wq;
2900         struct ib_wq_init_attr wq_init_attr = {};
2901         size_t required_cmd_sz;
2902         size_t required_resp_len;
2903
2904         required_cmd_sz = offsetof(typeof(cmd), max_sge) + sizeof(cmd.max_sge);
2905         required_resp_len = offsetof(typeof(resp), wqn) + sizeof(resp.wqn);
2906
2907         if (ucore->inlen < required_cmd_sz)
2908                 return -EINVAL;
2909
2910         if (ucore->outlen < required_resp_len)
2911                 return -ENOSPC;
2912
2913         if (ucore->inlen > sizeof(cmd) &&
2914             !ib_is_udata_cleared(ucore, sizeof(cmd),
2915                                  ucore->inlen - sizeof(cmd)))
2916                 return -EOPNOTSUPP;
2917
2918         err = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
2919         if (err)
2920                 return err;
2921
2922         if (cmd.comp_mask)
2923                 return -EOPNOTSUPP;
2924
2925         obj  = (struct ib_uwq_object *)uobj_alloc(uobj_get_type(wq),
2926                                                   file->ucontext);
2927         if (IS_ERR(obj))
2928                 return PTR_ERR(obj);
2929
2930         pd  = uobj_get_obj_read(pd, cmd.pd_handle, file->ucontext);
2931         if (!pd) {
2932                 err = -EINVAL;
2933                 goto err_uobj;
2934         }
2935
2936         cq = uobj_get_obj_read(cq, cmd.cq_handle, file->ucontext);
2937         if (!cq) {
2938                 err = -EINVAL;
2939                 goto err_put_pd;
2940         }
2941
2942         wq_init_attr.cq = cq;
2943         wq_init_attr.max_sge = cmd.max_sge;
2944         wq_init_attr.max_wr = cmd.max_wr;
2945         wq_init_attr.wq_context = file;
2946         wq_init_attr.wq_type = cmd.wq_type;
2947         wq_init_attr.event_handler = ib_uverbs_wq_event_handler;
2948         if (ucore->inlen >= (offsetof(typeof(cmd), create_flags) +
2949                              sizeof(cmd.create_flags)))
2950                 wq_init_attr.create_flags = cmd.create_flags;
2951         obj->uevent.events_reported = 0;
2952         INIT_LIST_HEAD(&obj->uevent.event_list);
2953         wq = pd->device->create_wq(pd, &wq_init_attr, uhw);
2954         if (IS_ERR(wq)) {
2955                 err = PTR_ERR(wq);
2956                 goto err_put_cq;
2957         }
2958
2959         wq->uobject = &obj->uevent.uobject;
2960         obj->uevent.uobject.object = wq;
2961         wq->wq_type = wq_init_attr.wq_type;
2962         wq->cq = cq;
2963         wq->pd = pd;
2964         wq->device = pd->device;
2965         wq->wq_context = wq_init_attr.wq_context;
2966         atomic_set(&wq->usecnt, 0);
2967         atomic_inc(&pd->usecnt);
2968         atomic_inc(&cq->usecnt);
2969         wq->uobject = &obj->uevent.uobject;
2970         obj->uevent.uobject.object = wq;
2971
2972         memset(&resp, 0, sizeof(resp));
2973         resp.wq_handle = obj->uevent.uobject.id;
2974         resp.max_sge = wq_init_attr.max_sge;
2975         resp.max_wr = wq_init_attr.max_wr;
2976         resp.wqn = wq->wq_num;
2977         resp.response_length = required_resp_len;
2978         err = ib_copy_to_udata(ucore,
2979                                &resp, resp.response_length);
2980         if (err)
2981                 goto err_copy;
2982
2983         uobj_put_obj_read(pd);
2984         uobj_put_obj_read(cq);
2985         uobj_alloc_commit(&obj->uevent.uobject);
2986         return 0;
2987
2988 err_copy:
2989         ib_destroy_wq(wq);
2990 err_put_cq:
2991         uobj_put_obj_read(cq);
2992 err_put_pd:
2993         uobj_put_obj_read(pd);
2994 err_uobj:
2995         uobj_alloc_abort(&obj->uevent.uobject);
2996
2997         return err;
2998 }
2999
3000 int ib_uverbs_ex_destroy_wq(struct ib_uverbs_file *file,
3001                             struct ib_device *ib_dev,
3002                             struct ib_udata *ucore,
3003                             struct ib_udata *uhw)
3004 {
3005         struct ib_uverbs_ex_destroy_wq  cmd = {};
3006         struct ib_uverbs_ex_destroy_wq_resp     resp = {};
3007         struct ib_wq                    *wq;
3008         struct ib_uobject               *uobj;
3009         struct ib_uwq_object            *obj;
3010         size_t required_cmd_sz;
3011         size_t required_resp_len;
3012         int                             ret;
3013
3014         required_cmd_sz = offsetof(typeof(cmd), wq_handle) + sizeof(cmd.wq_handle);
3015         required_resp_len = offsetof(typeof(resp), reserved) + sizeof(resp.reserved);
3016
3017         if (ucore->inlen < required_cmd_sz)
3018                 return -EINVAL;
3019
3020         if (ucore->outlen < required_resp_len)
3021                 return -ENOSPC;
3022
3023         if (ucore->inlen > sizeof(cmd) &&
3024             !ib_is_udata_cleared(ucore, sizeof(cmd),
3025                                  ucore->inlen - sizeof(cmd)))
3026                 return -EOPNOTSUPP;
3027
3028         ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
3029         if (ret)
3030                 return ret;
3031
3032         if (cmd.comp_mask)
3033                 return -EOPNOTSUPP;
3034
3035         resp.response_length = required_resp_len;
3036         uobj  = uobj_get_write(uobj_get_type(wq), cmd.wq_handle,
3037                                file->ucontext);
3038         if (IS_ERR(uobj))
3039                 return PTR_ERR(uobj);
3040
3041         wq = uobj->object;
3042         obj = container_of(uobj, struct ib_uwq_object, uevent.uobject);
3043         /*
3044          * Make sure we don't free the memory in remove_commit as we still
3045          * needs the uobject memory to create the response.
3046          */
3047         uverbs_uobject_get(uobj);
3048
3049         ret = uobj_remove_commit(uobj);
3050         resp.events_reported = obj->uevent.events_reported;
3051         uverbs_uobject_put(uobj);
3052         if (ret)
3053                 return ret;
3054
3055         return ib_copy_to_udata(ucore, &resp, resp.response_length);
3056 }
3057
3058 int ib_uverbs_ex_modify_wq(struct ib_uverbs_file *file,
3059                            struct ib_device *ib_dev,
3060                            struct ib_udata *ucore,
3061                            struct ib_udata *uhw)
3062 {
3063         struct ib_uverbs_ex_modify_wq cmd = {};
3064         struct ib_wq *wq;
3065         struct ib_wq_attr wq_attr = {};
3066         size_t required_cmd_sz;
3067         int ret;
3068
3069         required_cmd_sz = offsetof(typeof(cmd), curr_wq_state) + sizeof(cmd.curr_wq_state);
3070         if (ucore->inlen < required_cmd_sz)
3071                 return -EINVAL;
3072
3073         if (ucore->inlen > sizeof(cmd) &&
3074             !ib_is_udata_cleared(ucore, sizeof(cmd),
3075                                  ucore->inlen - sizeof(cmd)))
3076                 return -EOPNOTSUPP;
3077
3078         ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
3079         if (ret)
3080                 return ret;
3081
3082         if (!cmd.attr_mask)
3083                 return -EINVAL;
3084
3085         if (cmd.attr_mask > (IB_WQ_STATE | IB_WQ_CUR_STATE | IB_WQ_FLAGS))
3086                 return -EINVAL;
3087
3088         wq = uobj_get_obj_read(wq, cmd.wq_handle, file->ucontext);
3089         if (!wq)
3090                 return -EINVAL;
3091
3092         wq_attr.curr_wq_state = cmd.curr_wq_state;
3093         wq_attr.wq_state = cmd.wq_state;
3094         if (cmd.attr_mask & IB_WQ_FLAGS) {
3095                 wq_attr.flags = cmd.flags;
3096                 wq_attr.flags_mask = cmd.flags_mask;
3097         }
3098         ret = wq->device->modify_wq(wq, &wq_attr, cmd.attr_mask, uhw);
3099         uobj_put_obj_read(wq);
3100         return ret;
3101 }
3102
3103 int ib_uverbs_ex_create_rwq_ind_table(struct ib_uverbs_file *file,
3104                                       struct ib_device *ib_dev,
3105                                       struct ib_udata *ucore,
3106                                       struct ib_udata *uhw)
3107 {
3108         struct ib_uverbs_ex_create_rwq_ind_table          cmd = {};
3109         struct ib_uverbs_ex_create_rwq_ind_table_resp  resp = {};
3110         struct ib_uobject                 *uobj;
3111         int err = 0;
3112         struct ib_rwq_ind_table_init_attr init_attr = {};
3113         struct ib_rwq_ind_table *rwq_ind_tbl;
3114         struct ib_wq    **wqs = NULL;
3115         u32 *wqs_handles = NULL;
3116         struct ib_wq    *wq = NULL;
3117         int i, j, num_read_wqs;
3118         u32 num_wq_handles;
3119         u32 expected_in_size;
3120         size_t required_cmd_sz_header;
3121         size_t required_resp_len;
3122
3123         required_cmd_sz_header = offsetof(typeof(cmd), log_ind_tbl_size) + sizeof(cmd.log_ind_tbl_size);
3124         required_resp_len = offsetof(typeof(resp), ind_tbl_num) + sizeof(resp.ind_tbl_num);
3125
3126         if (ucore->inlen < required_cmd_sz_header)
3127                 return -EINVAL;
3128
3129         if (ucore->outlen < required_resp_len)
3130                 return -ENOSPC;
3131
3132         err = ib_copy_from_udata(&cmd, ucore, required_cmd_sz_header);
3133         if (err)
3134                 return err;
3135
3136         ucore->inbuf += required_cmd_sz_header;
3137         ucore->inlen -= required_cmd_sz_header;
3138
3139         if (cmd.comp_mask)
3140                 return -EOPNOTSUPP;
3141
3142         if (cmd.log_ind_tbl_size > IB_USER_VERBS_MAX_LOG_IND_TBL_SIZE)
3143                 return -EINVAL;
3144
3145         num_wq_handles = 1 << cmd.log_ind_tbl_size;
3146         expected_in_size = num_wq_handles * sizeof(__u32);
3147         if (num_wq_handles == 1)
3148                 /* input size for wq handles is u64 aligned */
3149                 expected_in_size += sizeof(__u32);
3150
3151         if (ucore->inlen < expected_in_size)
3152                 return -EINVAL;
3153
3154         if (ucore->inlen > expected_in_size &&
3155             !ib_is_udata_cleared(ucore, expected_in_size,
3156                                  ucore->inlen - expected_in_size))
3157                 return -EOPNOTSUPP;
3158
3159         wqs_handles = kcalloc(num_wq_handles, sizeof(*wqs_handles),
3160                               GFP_KERNEL);
3161         if (!wqs_handles)
3162                 return -ENOMEM;
3163
3164         err = ib_copy_from_udata(wqs_handles, ucore,
3165                                  num_wq_handles * sizeof(__u32));
3166         if (err)
3167                 goto err_free;
3168
3169         wqs = kcalloc(num_wq_handles, sizeof(*wqs), GFP_KERNEL);
3170         if (!wqs) {
3171                 err = -ENOMEM;
3172                 goto  err_free;
3173         }
3174
3175         for (num_read_wqs = 0; num_read_wqs < num_wq_handles;
3176                         num_read_wqs++) {
3177                 wq = uobj_get_obj_read(wq, wqs_handles[num_read_wqs],
3178                                        file->ucontext);
3179                 if (!wq) {
3180                         err = -EINVAL;
3181                         goto put_wqs;
3182                 }
3183
3184                 wqs[num_read_wqs] = wq;
3185         }
3186
3187         uobj  = uobj_alloc(uobj_get_type(rwq_ind_table), file->ucontext);
3188         if (IS_ERR(uobj)) {
3189                 err = PTR_ERR(uobj);
3190                 goto put_wqs;
3191         }
3192
3193         init_attr.log_ind_tbl_size = cmd.log_ind_tbl_size;
3194         init_attr.ind_tbl = wqs;
3195         rwq_ind_tbl = ib_dev->create_rwq_ind_table(ib_dev, &init_attr, uhw);
3196
3197         if (IS_ERR(rwq_ind_tbl)) {
3198                 err = PTR_ERR(rwq_ind_tbl);
3199                 goto err_uobj;
3200         }
3201
3202         rwq_ind_tbl->ind_tbl = wqs;
3203         rwq_ind_tbl->log_ind_tbl_size = init_attr.log_ind_tbl_size;
3204         rwq_ind_tbl->uobject = uobj;
3205         uobj->object = rwq_ind_tbl;
3206         rwq_ind_tbl->device = ib_dev;
3207         atomic_set(&rwq_ind_tbl->usecnt, 0);
3208
3209         for (i = 0; i < num_wq_handles; i++)
3210                 atomic_inc(&wqs[i]->usecnt);
3211
3212         resp.ind_tbl_handle = uobj->id;
3213         resp.ind_tbl_num = rwq_ind_tbl->ind_tbl_num;
3214         resp.response_length = required_resp_len;
3215
3216         err = ib_copy_to_udata(ucore,
3217                                &resp, resp.response_length);
3218         if (err)
3219                 goto err_copy;
3220
3221         kfree(wqs_handles);
3222
3223         for (j = 0; j < num_read_wqs; j++)
3224                 uobj_put_obj_read(wqs[j]);
3225
3226         uobj_alloc_commit(uobj);
3227         return 0;
3228
3229 err_copy:
3230         ib_destroy_rwq_ind_table(rwq_ind_tbl);
3231 err_uobj:
3232         uobj_alloc_abort(uobj);
3233 put_wqs:
3234         for (j = 0; j < num_read_wqs; j++)
3235                 uobj_put_obj_read(wqs[j]);
3236 err_free:
3237         kfree(wqs_handles);
3238         kfree(wqs);
3239         return err;
3240 }
3241
3242 int ib_uverbs_ex_destroy_rwq_ind_table(struct ib_uverbs_file *file,
3243                                        struct ib_device *ib_dev,
3244                                        struct ib_udata *ucore,
3245                                        struct ib_udata *uhw)
3246 {
3247         struct ib_uverbs_ex_destroy_rwq_ind_table       cmd = {};
3248         struct ib_uobject               *uobj;
3249         int                     ret;
3250         size_t required_cmd_sz;
3251
3252         required_cmd_sz = offsetof(typeof(cmd), ind_tbl_handle) + sizeof(cmd.ind_tbl_handle);
3253
3254         if (ucore->inlen < required_cmd_sz)
3255                 return -EINVAL;
3256
3257         if (ucore->inlen > sizeof(cmd) &&
3258             !ib_is_udata_cleared(ucore, sizeof(cmd),
3259                                  ucore->inlen - sizeof(cmd)))
3260                 return -EOPNOTSUPP;
3261
3262         ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
3263         if (ret)
3264                 return ret;
3265
3266         if (cmd.comp_mask)
3267                 return -EOPNOTSUPP;
3268
3269         uobj  = uobj_get_write(uobj_get_type(rwq_ind_table), cmd.ind_tbl_handle,
3270                                file->ucontext);
3271         if (IS_ERR(uobj))
3272                 return PTR_ERR(uobj);
3273
3274         return uobj_remove_commit(uobj);
3275 }
3276
3277 int ib_uverbs_ex_create_flow(struct ib_uverbs_file *file,
3278                              struct ib_device *ib_dev,
3279                              struct ib_udata *ucore,
3280                              struct ib_udata *uhw)
3281 {
3282         struct ib_uverbs_create_flow      cmd;
3283         struct ib_uverbs_create_flow_resp resp;
3284         struct ib_uobject                 *uobj;
3285         struct ib_flow                    *flow_id;
3286         struct ib_uverbs_flow_attr        *kern_flow_attr;
3287         struct ib_flow_attr               *flow_attr;
3288         struct ib_qp                      *qp;
3289         int err = 0;
3290         void *kern_spec;
3291         void *ib_spec;
3292         int i;
3293
3294         if (ucore->inlen < sizeof(cmd))
3295                 return -EINVAL;
3296
3297         if (ucore->outlen < sizeof(resp))
3298                 return -ENOSPC;
3299
3300         err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3301         if (err)
3302                 return err;
3303
3304         ucore->inbuf += sizeof(cmd);
3305         ucore->inlen -= sizeof(cmd);
3306
3307         if (cmd.comp_mask)
3308                 return -EINVAL;
3309
3310         if (!capable(CAP_NET_RAW))
3311                 return -EPERM;
3312
3313         if (cmd.flow_attr.flags >= IB_FLOW_ATTR_FLAGS_RESERVED)
3314                 return -EINVAL;
3315
3316         if ((cmd.flow_attr.flags & IB_FLOW_ATTR_FLAGS_DONT_TRAP) &&
3317             ((cmd.flow_attr.type == IB_FLOW_ATTR_ALL_DEFAULT) ||
3318              (cmd.flow_attr.type == IB_FLOW_ATTR_MC_DEFAULT)))
3319                 return -EINVAL;
3320
3321         if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS)
3322                 return -EINVAL;
3323
3324         if (cmd.flow_attr.size > ucore->inlen ||
3325             cmd.flow_attr.size >
3326             (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec)))
3327                 return -EINVAL;
3328
3329         if (cmd.flow_attr.reserved[0] ||
3330             cmd.flow_attr.reserved[1])
3331                 return -EINVAL;
3332
3333         if (cmd.flow_attr.num_of_specs) {
3334                 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size,
3335                                          GFP_KERNEL);
3336                 if (!kern_flow_attr)
3337                         return -ENOMEM;
3338
3339                 memcpy(kern_flow_attr, &cmd.flow_attr, sizeof(*kern_flow_attr));
3340                 err = ib_copy_from_udata(kern_flow_attr + 1, ucore,
3341                                          cmd.flow_attr.size);
3342                 if (err)
3343                         goto err_free_attr;
3344         } else {
3345                 kern_flow_attr = &cmd.flow_attr;
3346         }
3347
3348         uobj  = uobj_alloc(uobj_get_type(flow), file->ucontext);
3349         if (IS_ERR(uobj)) {
3350                 err = PTR_ERR(uobj);
3351                 goto err_free_attr;
3352         }
3353
3354         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
3355         if (!qp) {
3356                 err = -EINVAL;
3357                 goto err_uobj;
3358         }
3359
3360         flow_attr = kzalloc(sizeof(*flow_attr) + cmd.flow_attr.num_of_specs *
3361                             sizeof(union ib_flow_spec), GFP_KERNEL);
3362         if (!flow_attr) {
3363                 err = -ENOMEM;
3364                 goto err_put;
3365         }
3366
3367         flow_attr->type = kern_flow_attr->type;
3368         flow_attr->priority = kern_flow_attr->priority;
3369         flow_attr->num_of_specs = kern_flow_attr->num_of_specs;
3370         flow_attr->port = kern_flow_attr->port;
3371         flow_attr->flags = kern_flow_attr->flags;
3372         flow_attr->size = sizeof(*flow_attr);
3373
3374         kern_spec = kern_flow_attr + 1;
3375         ib_spec = flow_attr + 1;
3376         for (i = 0; i < flow_attr->num_of_specs &&
3377              cmd.flow_attr.size > offsetof(struct ib_uverbs_flow_spec, reserved) &&
3378              cmd.flow_attr.size >=
3379              ((struct ib_uverbs_flow_spec *)kern_spec)->size; i++) {
3380                 err = kern_spec_to_ib_spec(kern_spec, ib_spec);
3381                 if (err)
3382                         goto err_free;
3383                 flow_attr->size +=
3384                         ((union ib_flow_spec *) ib_spec)->size;
3385                 cmd.flow_attr.size -= ((struct ib_uverbs_flow_spec *)kern_spec)->size;
3386                 kern_spec += ((struct ib_uverbs_flow_spec *) kern_spec)->size;
3387                 ib_spec += ((union ib_flow_spec *) ib_spec)->size;
3388         }
3389         if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) {
3390                 pr_warn("create flow failed, flow %d: %d bytes left from uverb cmd\n",
3391                         i, cmd.flow_attr.size);
3392                 err = -EINVAL;
3393                 goto err_free;
3394         }
3395         flow_id = ib_create_flow(qp, flow_attr, IB_FLOW_DOMAIN_USER);
3396         if (IS_ERR(flow_id)) {
3397                 err = PTR_ERR(flow_id);
3398                 goto err_free;
3399         }
3400         flow_id->uobject = uobj;
3401         uobj->object = flow_id;
3402
3403         memset(&resp, 0, sizeof(resp));
3404         resp.flow_handle = uobj->id;
3405
3406         err = ib_copy_to_udata(ucore,
3407                                &resp, sizeof(resp));
3408         if (err)
3409                 goto err_copy;
3410
3411         uobj_put_obj_read(qp);
3412         uobj_alloc_commit(uobj);
3413         kfree(flow_attr);
3414         if (cmd.flow_attr.num_of_specs)
3415                 kfree(kern_flow_attr);
3416         return 0;
3417 err_copy:
3418         ib_destroy_flow(flow_id);
3419 err_free:
3420         kfree(flow_attr);
3421 err_put:
3422         uobj_put_obj_read(qp);
3423 err_uobj:
3424         uobj_alloc_abort(uobj);
3425 err_free_attr:
3426         if (cmd.flow_attr.num_of_specs)
3427                 kfree(kern_flow_attr);
3428         return err;
3429 }
3430
3431 int ib_uverbs_ex_destroy_flow(struct ib_uverbs_file *file,
3432                               struct ib_device *ib_dev,
3433                               struct ib_udata *ucore,
3434                               struct ib_udata *uhw)
3435 {
3436         struct ib_uverbs_destroy_flow   cmd;
3437         struct ib_uobject               *uobj;
3438         int                             ret;
3439
3440         if (ucore->inlen < sizeof(cmd))
3441                 return -EINVAL;
3442
3443         ret = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3444         if (ret)
3445                 return ret;
3446
3447         if (cmd.comp_mask)
3448                 return -EINVAL;
3449
3450         uobj  = uobj_get_write(uobj_get_type(flow), cmd.flow_handle,
3451                                file->ucontext);
3452         if (IS_ERR(uobj))
3453                 return PTR_ERR(uobj);
3454
3455         ret = uobj_remove_commit(uobj);
3456         return ret;
3457 }
3458
3459 static int __uverbs_create_xsrq(struct ib_uverbs_file *file,
3460                                 struct ib_device *ib_dev,
3461                                 struct ib_uverbs_create_xsrq *cmd,
3462                                 struct ib_udata *udata)
3463 {
3464         struct ib_uverbs_create_srq_resp resp;
3465         struct ib_usrq_object           *obj;
3466         struct ib_pd                    *pd;
3467         struct ib_srq                   *srq;
3468         struct ib_uobject               *uninitialized_var(xrcd_uobj);
3469         struct ib_srq_init_attr          attr;
3470         int ret;
3471
3472         obj  = (struct ib_usrq_object *)uobj_alloc(uobj_get_type(srq),
3473                                                    file->ucontext);
3474         if (IS_ERR(obj))
3475                 return PTR_ERR(obj);
3476
3477         if (cmd->srq_type == IB_SRQT_XRC) {
3478                 xrcd_uobj = uobj_get_read(uobj_get_type(xrcd), cmd->xrcd_handle,
3479                                           file->ucontext);
3480                 if (IS_ERR(xrcd_uobj)) {
3481                         ret = -EINVAL;
3482                         goto err;
3483                 }
3484
3485                 attr.ext.xrc.xrcd = (struct ib_xrcd *)xrcd_uobj->object;
3486                 if (!attr.ext.xrc.xrcd) {
3487                         ret = -EINVAL;
3488                         goto err_put_xrcd;
3489                 }
3490
3491                 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
3492                 atomic_inc(&obj->uxrcd->refcnt);
3493
3494                 attr.ext.xrc.cq  = uobj_get_obj_read(cq, cmd->cq_handle,
3495                                                      file->ucontext);
3496                 if (!attr.ext.xrc.cq) {
3497                         ret = -EINVAL;
3498                         goto err_put_xrcd;
3499                 }
3500         }
3501
3502         pd  = uobj_get_obj_read(pd, cmd->pd_handle, file->ucontext);
3503         if (!pd) {
3504                 ret = -EINVAL;
3505                 goto err_put_cq;
3506         }
3507
3508         attr.event_handler  = ib_uverbs_srq_event_handler;
3509         attr.srq_context    = file;
3510         attr.srq_type       = cmd->srq_type;
3511         attr.attr.max_wr    = cmd->max_wr;
3512         attr.attr.max_sge   = cmd->max_sge;
3513         attr.attr.srq_limit = cmd->srq_limit;
3514
3515         obj->uevent.events_reported = 0;
3516         INIT_LIST_HEAD(&obj->uevent.event_list);
3517
3518         srq = pd->device->create_srq(pd, &attr, udata);
3519         if (IS_ERR(srq)) {
3520                 ret = PTR_ERR(srq);
3521                 goto err_put;
3522         }
3523
3524         srq->device        = pd->device;
3525         srq->pd            = pd;
3526         srq->srq_type      = cmd->srq_type;
3527         srq->uobject       = &obj->uevent.uobject;
3528         srq->event_handler = attr.event_handler;
3529         srq->srq_context   = attr.srq_context;
3530
3531         if (cmd->srq_type == IB_SRQT_XRC) {
3532                 srq->ext.xrc.cq   = attr.ext.xrc.cq;
3533                 srq->ext.xrc.xrcd = attr.ext.xrc.xrcd;
3534                 atomic_inc(&attr.ext.xrc.cq->usecnt);
3535                 atomic_inc(&attr.ext.xrc.xrcd->usecnt);
3536         }
3537
3538         atomic_inc(&pd->usecnt);
3539         atomic_set(&srq->usecnt, 0);
3540
3541         obj->uevent.uobject.object = srq;
3542         obj->uevent.uobject.user_handle = cmd->user_handle;
3543
3544         memset(&resp, 0, sizeof resp);
3545         resp.srq_handle = obj->uevent.uobject.id;
3546         resp.max_wr     = attr.attr.max_wr;
3547         resp.max_sge    = attr.attr.max_sge;
3548         if (cmd->srq_type == IB_SRQT_XRC)
3549                 resp.srqn = srq->ext.xrc.srq_num;
3550
3551         if (copy_to_user((void __user *) (unsigned long) cmd->response,
3552                          &resp, sizeof resp)) {
3553                 ret = -EFAULT;
3554                 goto err_copy;
3555         }
3556
3557         if (cmd->srq_type == IB_SRQT_XRC) {
3558                 uobj_put_read(xrcd_uobj);
3559                 uobj_put_obj_read(attr.ext.xrc.cq);
3560         }
3561         uobj_put_obj_read(pd);
3562         uobj_alloc_commit(&obj->uevent.uobject);
3563
3564         return 0;
3565
3566 err_copy:
3567         ib_destroy_srq(srq);
3568
3569 err_put:
3570         uobj_put_obj_read(pd);
3571
3572 err_put_cq:
3573         if (cmd->srq_type == IB_SRQT_XRC)
3574                 uobj_put_obj_read(attr.ext.xrc.cq);
3575
3576 err_put_xrcd:
3577         if (cmd->srq_type == IB_SRQT_XRC) {
3578                 atomic_dec(&obj->uxrcd->refcnt);
3579                 uobj_put_read(xrcd_uobj);
3580         }
3581
3582 err:
3583         uobj_alloc_abort(&obj->uevent.uobject);
3584         return ret;
3585 }
3586
3587 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
3588                              struct ib_device *ib_dev,
3589                              const char __user *buf, int in_len,
3590                              int out_len)
3591 {
3592         struct ib_uverbs_create_srq      cmd;
3593         struct ib_uverbs_create_xsrq     xcmd;
3594         struct ib_uverbs_create_srq_resp resp;
3595         struct ib_udata                  udata;
3596         int ret;
3597
3598         if (out_len < sizeof resp)
3599                 return -ENOSPC;
3600
3601         if (copy_from_user(&cmd, buf, sizeof cmd))
3602                 return -EFAULT;
3603
3604         xcmd.response    = cmd.response;
3605         xcmd.user_handle = cmd.user_handle;
3606         xcmd.srq_type    = IB_SRQT_BASIC;
3607         xcmd.pd_handle   = cmd.pd_handle;
3608         xcmd.max_wr      = cmd.max_wr;
3609         xcmd.max_sge     = cmd.max_sge;
3610         xcmd.srq_limit   = cmd.srq_limit;
3611
3612         INIT_UDATA(&udata, buf + sizeof cmd,
3613                    (unsigned long) cmd.response + sizeof resp,
3614                    in_len - sizeof cmd - sizeof(struct ib_uverbs_cmd_hdr),
3615                    out_len - sizeof resp);
3616
3617         ret = __uverbs_create_xsrq(file, ib_dev, &xcmd, &udata);
3618         if (ret)
3619                 return ret;
3620
3621         return in_len;
3622 }
3623
3624 ssize_t ib_uverbs_create_xsrq(struct ib_uverbs_file *file,
3625                               struct ib_device *ib_dev,
3626                               const char __user *buf, int in_len, int out_len)
3627 {
3628         struct ib_uverbs_create_xsrq     cmd;
3629         struct ib_uverbs_create_srq_resp resp;
3630         struct ib_udata                  udata;
3631         int ret;
3632
3633         if (out_len < sizeof resp)
3634                 return -ENOSPC;
3635
3636         if (copy_from_user(&cmd, buf, sizeof cmd))
3637                 return -EFAULT;
3638
3639         INIT_UDATA(&udata, buf + sizeof cmd,
3640                    (unsigned long) cmd.response + sizeof resp,
3641                    in_len - sizeof cmd - sizeof(struct ib_uverbs_cmd_hdr),
3642                    out_len - sizeof resp);
3643
3644         ret = __uverbs_create_xsrq(file, ib_dev, &cmd, &udata);
3645         if (ret)
3646                 return ret;
3647
3648         return in_len;
3649 }
3650
3651 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
3652                              struct ib_device *ib_dev,
3653                              const char __user *buf, int in_len,
3654                              int out_len)
3655 {
3656         struct ib_uverbs_modify_srq cmd;
3657         struct ib_udata             udata;
3658         struct ib_srq              *srq;
3659         struct ib_srq_attr          attr;
3660         int                         ret;
3661
3662         if (copy_from_user(&cmd, buf, sizeof cmd))
3663                 return -EFAULT;
3664
3665         INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
3666                    out_len);
3667
3668         srq = uobj_get_obj_read(srq, cmd.srq_handle, file->ucontext);
3669         if (!srq)
3670                 return -EINVAL;
3671
3672         attr.max_wr    = cmd.max_wr;
3673         attr.srq_limit = cmd.srq_limit;
3674
3675         ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata);
3676
3677         uobj_put_obj_read(srq);
3678
3679         return ret ? ret : in_len;
3680 }
3681
3682 ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
3683                             struct ib_device *ib_dev,
3684                             const char __user *buf,
3685                             int in_len, int out_len)
3686 {
3687         struct ib_uverbs_query_srq      cmd;
3688         struct ib_uverbs_query_srq_resp resp;
3689         struct ib_srq_attr              attr;
3690         struct ib_srq                   *srq;
3691         int                             ret;
3692
3693         if (out_len < sizeof resp)
3694                 return -ENOSPC;
3695
3696         if (copy_from_user(&cmd, buf, sizeof cmd))
3697                 return -EFAULT;
3698
3699         srq = uobj_get_obj_read(srq, cmd.srq_handle, file->ucontext);
3700         if (!srq)
3701                 return -EINVAL;
3702
3703         ret = ib_query_srq(srq, &attr);
3704
3705         uobj_put_obj_read(srq);
3706
3707         if (ret)
3708                 return ret;
3709
3710         memset(&resp, 0, sizeof resp);
3711
3712         resp.max_wr    = attr.max_wr;
3713         resp.max_sge   = attr.max_sge;
3714         resp.srq_limit = attr.srq_limit;
3715
3716         if (copy_to_user((void __user *) (unsigned long) cmd.response,
3717                          &resp, sizeof resp))
3718                 return -EFAULT;
3719
3720         return in_len;
3721 }
3722
3723 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
3724                               struct ib_device *ib_dev,
3725                               const char __user *buf, int in_len,
3726                               int out_len)
3727 {
3728         struct ib_uverbs_destroy_srq      cmd;
3729         struct ib_uverbs_destroy_srq_resp resp;
3730         struct ib_uobject                *uobj;
3731         struct ib_srq                    *srq;
3732         struct ib_uevent_object          *obj;
3733         int                               ret = -EINVAL;
3734         enum ib_srq_type                  srq_type;
3735
3736         if (copy_from_user(&cmd, buf, sizeof cmd))
3737                 return -EFAULT;
3738
3739         uobj  = uobj_get_write(uobj_get_type(srq), cmd.srq_handle,
3740                                file->ucontext);
3741         if (IS_ERR(uobj))
3742                 return PTR_ERR(uobj);
3743
3744         srq = uobj->object;
3745         obj = container_of(uobj, struct ib_uevent_object, uobject);
3746         srq_type = srq->srq_type;
3747         /*
3748          * Make sure we don't free the memory in remove_commit as we still
3749          * needs the uobject memory to create the response.
3750          */
3751         uverbs_uobject_get(uobj);
3752
3753         memset(&resp, 0, sizeof(resp));
3754
3755         ret = uobj_remove_commit(uobj);
3756         if (ret) {
3757                 uverbs_uobject_put(uobj);
3758                 return ret;
3759         }
3760         resp.events_reported = obj->events_reported;
3761         uverbs_uobject_put(uobj);
3762         if (copy_to_user((void __user *)(unsigned long)cmd.response,
3763                          &resp, sizeof(resp)))
3764                 return -EFAULT;
3765
3766         return in_len;
3767 }
3768
3769 int ib_uverbs_ex_query_device(struct ib_uverbs_file *file,
3770                               struct ib_device *ib_dev,
3771                               struct ib_udata *ucore,
3772                               struct ib_udata *uhw)
3773 {
3774         struct ib_uverbs_ex_query_device_resp resp = { {0} };
3775         struct ib_uverbs_ex_query_device  cmd;
3776         struct ib_device_attr attr = {0};
3777         int err;
3778
3779         if (ucore->inlen < sizeof(cmd))
3780                 return -EINVAL;
3781
3782         err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3783         if (err)
3784                 return err;
3785
3786         if (cmd.comp_mask)
3787                 return -EINVAL;
3788
3789         if (cmd.reserved)
3790                 return -EINVAL;
3791
3792         resp.response_length = offsetof(typeof(resp), odp_caps);
3793
3794         if (ucore->outlen < resp.response_length)
3795                 return -ENOSPC;
3796
3797         err = ib_dev->query_device(ib_dev, &attr, uhw);
3798         if (err)
3799                 return err;
3800
3801         copy_query_dev_fields(file, ib_dev, &resp.base, &attr);
3802
3803         if (ucore->outlen < resp.response_length + sizeof(resp.odp_caps))
3804                 goto end;
3805
3806 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
3807         resp.odp_caps.general_caps = attr.odp_caps.general_caps;
3808         resp.odp_caps.per_transport_caps.rc_odp_caps =
3809                 attr.odp_caps.per_transport_caps.rc_odp_caps;
3810         resp.odp_caps.per_transport_caps.uc_odp_caps =
3811                 attr.odp_caps.per_transport_caps.uc_odp_caps;
3812         resp.odp_caps.per_transport_caps.ud_odp_caps =
3813                 attr.odp_caps.per_transport_caps.ud_odp_caps;
3814 #endif
3815         resp.response_length += sizeof(resp.odp_caps);
3816
3817         if (ucore->outlen < resp.response_length + sizeof(resp.timestamp_mask))
3818                 goto end;
3819
3820         resp.timestamp_mask = attr.timestamp_mask;
3821         resp.response_length += sizeof(resp.timestamp_mask);
3822
3823         if (ucore->outlen < resp.response_length + sizeof(resp.hca_core_clock))
3824                 goto end;
3825
3826         resp.hca_core_clock = attr.hca_core_clock;
3827         resp.response_length += sizeof(resp.hca_core_clock);
3828
3829         if (ucore->outlen < resp.response_length + sizeof(resp.device_cap_flags_ex))
3830                 goto end;
3831
3832         resp.device_cap_flags_ex = attr.device_cap_flags;
3833         resp.response_length += sizeof(resp.device_cap_flags_ex);
3834
3835         if (ucore->outlen < resp.response_length + sizeof(resp.rss_caps))
3836                 goto end;
3837
3838         resp.rss_caps.supported_qpts = attr.rss_caps.supported_qpts;
3839         resp.rss_caps.max_rwq_indirection_tables =
3840                 attr.rss_caps.max_rwq_indirection_tables;
3841         resp.rss_caps.max_rwq_indirection_table_size =
3842                 attr.rss_caps.max_rwq_indirection_table_size;
3843
3844         resp.response_length += sizeof(resp.rss_caps);
3845
3846         if (ucore->outlen < resp.response_length + sizeof(resp.max_wq_type_rq))
3847                 goto end;
3848
3849         resp.max_wq_type_rq = attr.max_wq_type_rq;
3850         resp.response_length += sizeof(resp.max_wq_type_rq);
3851
3852         if (ucore->outlen < resp.response_length + sizeof(resp.raw_packet_caps))
3853                 goto end;
3854
3855         resp.raw_packet_caps = attr.raw_packet_caps;
3856         resp.response_length += sizeof(resp.raw_packet_caps);
3857 end:
3858         err = ib_copy_to_udata(ucore, &resp, resp.response_length);
3859         return err;
3860 }