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         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
  95                    u64_to_user_ptr(cmd.response) + sizeof(resp),
  96                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
  97                    out_len - sizeof(resp));
  98
  99         ret = ib_rdmacg_try_charge(&cg_obj, ib_dev, RDMACG_RESOURCE_HCA_HANDLE);
 100         if (ret)
 101                 goto err;
 102
 103         ucontext = ib_dev->alloc_ucontext(ib_dev, &udata);
 104         if (IS_ERR(ucontext)) {
 105                 ret = PTR_ERR(ucontext);
 106                 goto err_alloc;
 107         }
 108
 109         ucontext->device = ib_dev;
 110         ucontext->cg_obj = cg_obj;
 111         /* ufile is required when some objects are released */
 112         ucontext->ufile = file;
 113         uverbs_initialize_ucontext(ucontext);
 114
 115         rcu_read_lock();
 116         ucontext->tgid = get_task_pid(current->group_leader, PIDTYPE_PID);
 117         rcu_read_unlock();
 118         ucontext->closing = 0;
 119
 120 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
 121         ucontext->umem_tree = RB_ROOT_CACHED;
 122         init_rwsem(&ucontext->umem_rwsem);
 123         ucontext->odp_mrs_count = 0;
 124         INIT_LIST_HEAD(&ucontext->no_private_counters);
 125
 126         if (!(ib_dev->attrs.device_cap_flags & IB_DEVICE_ON_DEMAND_PAGING))
 127                 ucontext->invalidate_range = NULL;
 128
 129 #endif
 130
 131         resp.num_comp_vectors = file->device->num_comp_vectors;
 132
 133         ret = get_unused_fd_flags(O_CLOEXEC);
 134         if (ret < 0)
 135                 goto err_free;
 136         resp.async_fd = ret;
 137
 138         filp = ib_uverbs_alloc_async_event_file(file, ib_dev);
 139         if (IS_ERR(filp)) {
 140                 ret = PTR_ERR(filp);
 141                 goto err_fd;
 142         }
 143
 144         if (copy_to_user(u64_to_user_ptr(cmd.response), &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(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
 241                 return -EFAULT;
 242
 243         return in_len;
 244 }
 245
 246 ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
 247                              struct ib_device *ib_dev,
 248                              const char __user *buf,
 249                              int in_len, int out_len)
 250 {
 251         struct ib_uverbs_query_port      cmd;
 252         struct ib_uverbs_query_port_resp resp;
 253         struct ib_port_attr              attr;
 254         int                              ret;
 255
 256         if (out_len < sizeof resp)
 257                 return -ENOSPC;
 258
 259         if (copy_from_user(&cmd, buf, sizeof cmd))
 260                 return -EFAULT;
 261
 262         ret = ib_query_port(ib_dev, cmd.port_num, &attr);
 263         if (ret)
 264                 return ret;
 265
 266         memset(&resp, 0, sizeof resp);
 267
 268         resp.state           = attr.state;
 269         resp.max_mtu         = attr.max_mtu;
 270         resp.active_mtu      = attr.active_mtu;
 271         resp.gid_tbl_len     = attr.gid_tbl_len;
 272         resp.port_cap_flags  = attr.port_cap_flags;
 273         resp.max_msg_sz      = attr.max_msg_sz;
 274         resp.bad_pkey_cntr   = attr.bad_pkey_cntr;
 275         resp.qkey_viol_cntr  = attr.qkey_viol_cntr;
 276         resp.pkey_tbl_len    = attr.pkey_tbl_len;
 277
 278         if (rdma_cap_opa_ah(ib_dev, cmd.port_num)) {
 279                 resp.lid     = OPA_TO_IB_UCAST_LID(attr.lid);
 280                 resp.sm_lid  = OPA_TO_IB_UCAST_LID(attr.sm_lid);
 281         } else {
 282                 resp.lid     = ib_lid_cpu16(attr.lid);
 283                 resp.sm_lid  = ib_lid_cpu16(attr.sm_lid);
 284         }
 285         resp.lmc             = attr.lmc;
 286         resp.max_vl_num      = attr.max_vl_num;
 287         resp.sm_sl           = attr.sm_sl;
 288         resp.subnet_timeout  = attr.subnet_timeout;
 289         resp.init_type_reply = attr.init_type_reply;
 290         resp.active_width    = attr.active_width;
 291         resp.active_speed    = attr.active_speed;
 292         resp.phys_state      = attr.phys_state;
 293         resp.link_layer      = rdma_port_get_link_layer(ib_dev,
 294                                                         cmd.port_num);
 295
 296         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
 297                 return -EFAULT;
 298
 299         return in_len;
 300 }
 301
 302 ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
 303                            struct ib_device *ib_dev,
 304                            const char __user *buf,
 305                            int in_len, int out_len)
 306 {
 307         struct ib_uverbs_alloc_pd      cmd;
 308         struct ib_uverbs_alloc_pd_resp resp;
 309         struct ib_udata                udata;
 310         struct ib_uobject             *uobj;
 311         struct ib_pd                  *pd;
 312         int                            ret;
 313
 314         if (out_len < sizeof resp)
 315                 return -ENOSPC;
 316
 317         if (copy_from_user(&cmd, buf, sizeof cmd))
 318                 return -EFAULT;
 319
 320         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
 321                    u64_to_user_ptr(cmd.response) + sizeof(resp),
 322                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
 323                    out_len - sizeof(resp));
 324
 325         uobj  = uobj_alloc(uobj_get_type(pd), file->ucontext);
 326         if (IS_ERR(uobj))
 327                 return PTR_ERR(uobj);
 328
 329         pd = ib_dev->alloc_pd(ib_dev, file->ucontext, &udata);
 330         if (IS_ERR(pd)) {
 331                 ret = PTR_ERR(pd);
 332                 goto err;
 333         }
 334
 335         pd->device  = ib_dev;
 336         pd->uobject = uobj;
 337         pd->__internal_mr = NULL;
 338         atomic_set(&pd->usecnt, 0);
 339
 340         uobj->object = pd;
 341         memset(&resp, 0, sizeof resp);
 342         resp.pd_handle = uobj->id;
 343
 344         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
 345                 ret = -EFAULT;
 346                 goto err_copy;
 347         }
 348
 349         uobj_alloc_commit(uobj);
 350
 351         return in_len;
 352
 353 err_copy:
 354         ib_dealloc_pd(pd);
 355
 356 err:
 357         uobj_alloc_abort(uobj);
 358         return ret;
 359 }
 360
 361 ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
 362                              struct ib_device *ib_dev,
 363                              const char __user *buf,
 364                              int in_len, int out_len)
 365 {
 366         struct ib_uverbs_dealloc_pd cmd;
 367         struct ib_uobject          *uobj;
 368         int                         ret;
 369
 370         if (copy_from_user(&cmd, buf, sizeof cmd))
 371                 return -EFAULT;
 372
 373         uobj  = uobj_get_write(uobj_get_type(pd), cmd.pd_handle,
 374                                file->ucontext);
 375         if (IS_ERR(uobj))
 376                 return PTR_ERR(uobj);
 377
 378         ret = uobj_remove_commit(uobj);
 379
 380         return ret ?: in_len;
 381 }
 382
 383 struct xrcd_table_entry {
 384         struct rb_node  node;
 385         struct ib_xrcd *xrcd;
 386         struct inode   *inode;
 387 };
 388
 389 static int xrcd_table_insert(struct ib_uverbs_device *dev,
 390                             struct inode *inode,
 391                             struct ib_xrcd *xrcd)
 392 {
 393         struct xrcd_table_entry *entry, *scan;
 394         struct rb_node **p = &dev->xrcd_tree.rb_node;
 395         struct rb_node *parent = NULL;
 396
 397         entry = kmalloc(sizeof *entry, GFP_KERNEL);
 398         if (!entry)
 399                 return -ENOMEM;
 400
 401         entry->xrcd  = xrcd;
 402         entry->inode = inode;
 403
 404         while (*p) {
 405                 parent = *p;
 406                 scan = rb_entry(parent, struct xrcd_table_entry, node);
 407
 408                 if (inode < scan->inode) {
 409                         p = &(*p)->rb_left;
 410                 } else if (inode > scan->inode) {
 411                         p = &(*p)->rb_right;
 412                 } else {
 413                         kfree(entry);
 414                         return -EEXIST;
 415                 }
 416         }
 417
 418         rb_link_node(&entry->node, parent, p);
 419         rb_insert_color(&entry->node, &dev->xrcd_tree);
 420         igrab(inode);
 421         return 0;
 422 }
 423
 424 static struct xrcd_table_entry *xrcd_table_search(struct ib_uverbs_device *dev,
 425                                                   struct inode *inode)
 426 {
 427         struct xrcd_table_entry *entry;
 428         struct rb_node *p = dev->xrcd_tree.rb_node;
 429
 430         while (p) {
 431                 entry = rb_entry(p, struct xrcd_table_entry, node);
 432
 433                 if (inode < entry->inode)
 434                         p = p->rb_left;
 435                 else if (inode > entry->inode)
 436                         p = p->rb_right;
 437                 else
 438                         return entry;
 439         }
 440
 441         return NULL;
 442 }
 443
 444 static struct ib_xrcd *find_xrcd(struct ib_uverbs_device *dev, struct inode *inode)
 445 {
 446         struct xrcd_table_entry *entry;
 447
 448         entry = xrcd_table_search(dev, inode);
 449         if (!entry)
 450                 return NULL;
 451
 452         return entry->xrcd;
 453 }
 454
 455 static void xrcd_table_delete(struct ib_uverbs_device *dev,
 456                               struct inode *inode)
 457 {
 458         struct xrcd_table_entry *entry;
 459
 460         entry = xrcd_table_search(dev, inode);
 461         if (entry) {
 462                 iput(inode);
 463                 rb_erase(&entry->node, &dev->xrcd_tree);
 464                 kfree(entry);
 465         }
 466 }
 467
 468 ssize_t ib_uverbs_open_xrcd(struct ib_uverbs_file *file,
 469                             struct ib_device *ib_dev,
 470                             const char __user *buf, int in_len,
 471                             int out_len)
 472 {
 473         struct ib_uverbs_open_xrcd      cmd;
 474         struct ib_uverbs_open_xrcd_resp resp;
 475         struct ib_udata                 udata;
 476         struct ib_uxrcd_object         *obj;
 477         struct ib_xrcd                 *xrcd = NULL;
 478         struct fd                       f = {NULL, 0};
 479         struct inode                   *inode = NULL;
 480         int                             ret = 0;
 481         int                             new_xrcd = 0;
 482
 483         if (out_len < sizeof resp)
 484                 return -ENOSPC;
 485
 486         if (copy_from_user(&cmd, buf, sizeof cmd))
 487                 return -EFAULT;
 488
 489         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
 490                    u64_to_user_ptr(cmd.response) + sizeof(resp),
 491                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
 492                    out_len - sizeof(resp));
 493
 494         mutex_lock(&file->device->xrcd_tree_mutex);
 495
 496         if (cmd.fd != -1) {
 497                 /* search for file descriptor */
 498                 f = fdget(cmd.fd);
 499                 if (!f.file) {
 500                         ret = -EBADF;
 501                         goto err_tree_mutex_unlock;
 502                 }
 503
 504                 inode = file_inode(f.file);
 505                 xrcd = find_xrcd(file->device, inode);
 506                 if (!xrcd && !(cmd.oflags & O_CREAT)) {
 507                         /* no file descriptor. Need CREATE flag */
 508                         ret = -EAGAIN;
 509                         goto err_tree_mutex_unlock;
 510                 }
 511
 512                 if (xrcd && cmd.oflags & O_EXCL) {
 513                         ret = -EINVAL;
 514                         goto err_tree_mutex_unlock;
 515                 }
 516         }
 517
 518         obj  = (struct ib_uxrcd_object *)uobj_alloc(uobj_get_type(xrcd),
 519                                                     file->ucontext);
 520         if (IS_ERR(obj)) {
 521                 ret = PTR_ERR(obj);
 522                 goto err_tree_mutex_unlock;
 523         }
 524
 525         if (!xrcd) {
 526                 xrcd = ib_dev->alloc_xrcd(ib_dev, file->ucontext, &udata);
 527                 if (IS_ERR(xrcd)) {
 528                         ret = PTR_ERR(xrcd);
 529                         goto err;
 530                 }
 531
 532                 xrcd->inode   = inode;
 533                 xrcd->device  = ib_dev;
 534                 atomic_set(&xrcd->usecnt, 0);
 535                 mutex_init(&xrcd->tgt_qp_mutex);
 536                 INIT_LIST_HEAD(&xrcd->tgt_qp_list);
 537                 new_xrcd = 1;
 538         }
 539
 540         atomic_set(&obj->refcnt, 0);
 541         obj->uobject.object = xrcd;
 542         memset(&resp, 0, sizeof resp);
 543         resp.xrcd_handle = obj->uobject.id;
 544
 545         if (inode) {
 546                 if (new_xrcd) {
 547                         /* create new inode/xrcd table entry */
 548                         ret = xrcd_table_insert(file->device, inode, xrcd);
 549                         if (ret)
 550                                 goto err_dealloc_xrcd;
 551                 }
 552                 atomic_inc(&xrcd->usecnt);
 553         }
 554
 555         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
 556                 ret = -EFAULT;
 557                 goto err_copy;
 558         }
 559
 560         if (f.file)
 561                 fdput(f);
 562
 563         uobj_alloc_commit(&obj->uobject);
 564
 565         mutex_unlock(&file->device->xrcd_tree_mutex);
 566         return in_len;
 567
 568 err_copy:
 569         if (inode) {
 570                 if (new_xrcd)
 571                         xrcd_table_delete(file->device, inode);
 572                 atomic_dec(&xrcd->usecnt);
 573         }
 574
 575 err_dealloc_xrcd:
 576         ib_dealloc_xrcd(xrcd);
 577
 578 err:
 579         uobj_alloc_abort(&obj->uobject);
 580
 581 err_tree_mutex_unlock:
 582         if (f.file)
 583                 fdput(f);
 584
 585         mutex_unlock(&file->device->xrcd_tree_mutex);
 586
 587         return ret;
 588 }
 589
 590 ssize_t ib_uverbs_close_xrcd(struct ib_uverbs_file *file,
 591                              struct ib_device *ib_dev,
 592                              const char __user *buf, int in_len,
 593                              int out_len)
 594 {
 595         struct ib_uverbs_close_xrcd cmd;
 596         struct ib_uobject           *uobj;
 597         int                         ret = 0;
 598
 599         if (copy_from_user(&cmd, buf, sizeof cmd))
 600                 return -EFAULT;
 601
 602         uobj  = uobj_get_write(uobj_get_type(xrcd), cmd.xrcd_handle,
 603                                file->ucontext);
 604         if (IS_ERR(uobj)) {
 605                 mutex_unlock(&file->device->xrcd_tree_mutex);
 606                 return PTR_ERR(uobj);
 607         }
 608
 609         ret = uobj_remove_commit(uobj);
 610         return ret ?: in_len;
 611 }
 612
 613 int ib_uverbs_dealloc_xrcd(struct ib_uverbs_device *dev,
 614                            struct ib_xrcd *xrcd,
 615                            enum rdma_remove_reason why)
 616 {
 617         struct inode *inode;
 618         int ret;
 619
 620         inode = xrcd->inode;
 621         if (inode && !atomic_dec_and_test(&xrcd->usecnt))
 622                 return 0;
 623
 624         ret = ib_dealloc_xrcd(xrcd);
 625
 626         if (why == RDMA_REMOVE_DESTROY && ret)
 627                 atomic_inc(&xrcd->usecnt);
 628         else if (inode)
 629                 xrcd_table_delete(dev, inode);
 630
 631         return ret;
 632 }
 633
 634 ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
 635                          struct ib_device *ib_dev,
 636                          const char __user *buf, int in_len,
 637                          int out_len)
 638 {
 639         struct ib_uverbs_reg_mr      cmd;
 640         struct ib_uverbs_reg_mr_resp resp;
 641         struct ib_udata              udata;
 642         struct ib_uobject           *uobj;
 643         struct ib_pd                *pd;
 644         struct ib_mr                *mr;
 645         int                          ret;
 646
 647         if (out_len < sizeof resp)
 648                 return -ENOSPC;
 649
 650         if (copy_from_user(&cmd, buf, sizeof cmd))
 651                 return -EFAULT;
 652
 653         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
 654                    u64_to_user_ptr(cmd.response) + sizeof(resp),
 655                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
 656                    out_len - sizeof(resp));
 657
 658         if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
 659                 return -EINVAL;
 660
 661         ret = ib_check_mr_access(cmd.access_flags);
 662         if (ret)
 663                 return ret;
 664
 665         uobj  = uobj_alloc(uobj_get_type(mr), file->ucontext);
 666         if (IS_ERR(uobj))
 667                 return PTR_ERR(uobj);
 668
 669         pd = uobj_get_obj_read(pd, cmd.pd_handle, file->ucontext);
 670         if (!pd) {
 671                 ret = -EINVAL;
 672                 goto err_free;
 673         }
 674
 675         if (cmd.access_flags & IB_ACCESS_ON_DEMAND) {
 676                 if (!(pd->device->attrs.device_cap_flags &
 677                       IB_DEVICE_ON_DEMAND_PAGING)) {
 678                         pr_debug("ODP support not available\n");
 679                         ret = -EINVAL;
 680                         goto err_put;
 681                 }
 682         }
 683
 684         mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
 685                                      cmd.access_flags, &udata);
 686         if (IS_ERR(mr)) {
 687                 ret = PTR_ERR(mr);
 688                 goto err_put;
 689         }
 690
 691         mr->device  = pd->device;
 692         mr->pd      = pd;
 693         mr->uobject = uobj;
 694         atomic_inc(&pd->usecnt);
 695
 696         uobj->object = mr;
 697
 698         memset(&resp, 0, sizeof resp);
 699         resp.lkey      = mr->lkey;
 700         resp.rkey      = mr->rkey;
 701         resp.mr_handle = uobj->id;
 702
 703         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
 704                 ret = -EFAULT;
 705                 goto err_copy;
 706         }
 707
 708         uobj_put_obj_read(pd);
 709
 710         uobj_alloc_commit(uobj);
 711
 712         return in_len;
 713
 714 err_copy:
 715         ib_dereg_mr(mr);
 716
 717 err_put:
 718         uobj_put_obj_read(pd);
 719
 720 err_free:
 721         uobj_alloc_abort(uobj);
 722         return ret;
 723 }
 724
 725 ssize_t ib_uverbs_rereg_mr(struct ib_uverbs_file *file,
 726                            struct ib_device *ib_dev,
 727                            const char __user *buf, int in_len,
 728                            int out_len)
 729 {
 730         struct ib_uverbs_rereg_mr      cmd;
 731         struct ib_uverbs_rereg_mr_resp resp;
 732         struct ib_udata              udata;
 733         struct ib_pd                *pd = NULL;
 734         struct ib_mr                *mr;
 735         struct ib_pd                *old_pd;
 736         int                          ret;
 737         struct ib_uobject           *uobj;
 738
 739         if (out_len < sizeof(resp))
 740                 return -ENOSPC;
 741
 742         if (copy_from_user(&cmd, buf, sizeof(cmd)))
 743                 return -EFAULT;
 744
 745         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
 746                    u64_to_user_ptr(cmd.response) + sizeof(resp),
 747                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
 748                    out_len - sizeof(resp));
 749
 750         if (cmd.flags & ~IB_MR_REREG_SUPPORTED || !cmd.flags)
 751                 return -EINVAL;
 752
 753         if ((cmd.flags & IB_MR_REREG_TRANS) &&
 754             (!cmd.start || !cmd.hca_va || 0 >= cmd.length ||
 755              (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)))
 756                         return -EINVAL;
 757
 758         uobj  = uobj_get_write(uobj_get_type(mr), cmd.mr_handle,
 759                                file->ucontext);
 760         if (IS_ERR(uobj))
 761                 return PTR_ERR(uobj);
 762
 763         mr = uobj->object;
 764
 765         if (cmd.flags & IB_MR_REREG_ACCESS) {
 766                 ret = ib_check_mr_access(cmd.access_flags);
 767                 if (ret)
 768                         goto put_uobjs;
 769         }
 770
 771         if (cmd.flags & IB_MR_REREG_PD) {
 772                 pd = uobj_get_obj_read(pd, cmd.pd_handle, file->ucontext);
 773                 if (!pd) {
 774                         ret = -EINVAL;
 775                         goto put_uobjs;
 776                 }
 777         }
 778
 779         old_pd = mr->pd;
 780         ret = mr->device->rereg_user_mr(mr, cmd.flags, cmd.start,
 781                                         cmd.length, cmd.hca_va,
 782                                         cmd.access_flags, pd, &udata);
 783         if (!ret) {
 784                 if (cmd.flags & IB_MR_REREG_PD) {
 785                         atomic_inc(&pd->usecnt);
 786                         mr->pd = pd;
 787                         atomic_dec(&old_pd->usecnt);
 788                 }
 789         } else {
 790                 goto put_uobj_pd;
 791         }
 792
 793         memset(&resp, 0, sizeof(resp));
 794         resp.lkey      = mr->lkey;
 795         resp.rkey      = mr->rkey;
 796
 797         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof(resp)))
 798                 ret = -EFAULT;
 799         else
 800                 ret = in_len;
 801
 802 put_uobj_pd:
 803         if (cmd.flags & IB_MR_REREG_PD)
 804                 uobj_put_obj_read(pd);
 805
 806 put_uobjs:
 807         uobj_put_write(uobj);
 808
 809         return ret;
 810 }
 811
 812 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
 813                            struct ib_device *ib_dev,
 814                            const char __user *buf, int in_len,
 815                            int out_len)
 816 {
 817         struct ib_uverbs_dereg_mr cmd;
 818         struct ib_uobject        *uobj;
 819         int                       ret = -EINVAL;
 820
 821         if (copy_from_user(&cmd, buf, sizeof cmd))
 822                 return -EFAULT;
 823
 824         uobj  = uobj_get_write(uobj_get_type(mr), cmd.mr_handle,
 825                                file->ucontext);
 826         if (IS_ERR(uobj))
 827                 return PTR_ERR(uobj);
 828
 829         ret = uobj_remove_commit(uobj);
 830
 831         return ret ?: in_len;
 832 }
 833
 834 ssize_t ib_uverbs_alloc_mw(struct ib_uverbs_file *file,
 835                            struct ib_device *ib_dev,
 836                            const char __user *buf, int in_len,
 837                            int out_len)
 838 {
 839         struct ib_uverbs_alloc_mw      cmd;
 840         struct ib_uverbs_alloc_mw_resp resp;
 841         struct ib_uobject             *uobj;
 842         struct ib_pd                  *pd;
 843         struct ib_mw                  *mw;
 844         struct ib_udata                udata;
 845         int                            ret;
 846
 847         if (out_len < sizeof(resp))
 848                 return -ENOSPC;
 849
 850         if (copy_from_user(&cmd, buf, sizeof(cmd)))
 851                 return -EFAULT;
 852
 853         uobj  = uobj_alloc(uobj_get_type(mw), file->ucontext);
 854         if (IS_ERR(uobj))
 855                 return PTR_ERR(uobj);
 856
 857         pd = uobj_get_obj_read(pd, cmd.pd_handle, file->ucontext);
 858         if (!pd) {
 859                 ret = -EINVAL;
 860                 goto err_free;
 861         }
 862
 863         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
 864                    u64_to_user_ptr(cmd.response) + sizeof(resp),
 865                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
 866                    out_len - sizeof(resp));
 867
 868         mw = pd->device->alloc_mw(pd, cmd.mw_type, &udata);
 869         if (IS_ERR(mw)) {
 870                 ret = PTR_ERR(mw);
 871                 goto err_put;
 872         }
 873
 874         mw->device  = pd->device;
 875         mw->pd      = pd;
 876         mw->uobject = uobj;
 877         atomic_inc(&pd->usecnt);
 878
 879         uobj->object = mw;
 880
 881         memset(&resp, 0, sizeof(resp));
 882         resp.rkey      = mw->rkey;
 883         resp.mw_handle = uobj->id;
 884
 885         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof(resp))) {
 886                 ret = -EFAULT;
 887                 goto err_copy;
 888         }
 889
 890         uobj_put_obj_read(pd);
 891         uobj_alloc_commit(uobj);
 892
 893         return in_len;
 894
 895 err_copy:
 896         uverbs_dealloc_mw(mw);
 897 err_put:
 898         uobj_put_obj_read(pd);
 899 err_free:
 900         uobj_alloc_abort(uobj);
 901         return ret;
 902 }
 903
 904 ssize_t ib_uverbs_dealloc_mw(struct ib_uverbs_file *file,
 905                              struct ib_device *ib_dev,
 906                              const char __user *buf, int in_len,
 907                              int out_len)
 908 {
 909         struct ib_uverbs_dealloc_mw cmd;
 910         struct ib_uobject          *uobj;
 911         int                         ret = -EINVAL;
 912
 913         if (copy_from_user(&cmd, buf, sizeof(cmd)))
 914                 return -EFAULT;
 915
 916         uobj  = uobj_get_write(uobj_get_type(mw), cmd.mw_handle,
 917                                file->ucontext);
 918         if (IS_ERR(uobj))
 919                 return PTR_ERR(uobj);
 920
 921         ret = uobj_remove_commit(uobj);
 922         return ret ?: in_len;
 923 }
 924
 925 ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
 926                                       struct ib_device *ib_dev,
 927                                       const char __user *buf, int in_len,
 928                                       int out_len)
 929 {
 930         struct ib_uverbs_create_comp_channel       cmd;
 931         struct ib_uverbs_create_comp_channel_resp  resp;
 932         struct ib_uobject                         *uobj;
 933         struct ib_uverbs_completion_event_file    *ev_file;
 934
 935         if (out_len < sizeof resp)
 936                 return -ENOSPC;
 937
 938         if (copy_from_user(&cmd, buf, sizeof cmd))
 939                 return -EFAULT;
 940
 941         uobj = uobj_alloc(uobj_get_type(comp_channel), file->ucontext);
 942         if (IS_ERR(uobj))
 943                 return PTR_ERR(uobj);
 944
 945         resp.fd = uobj->id;
 946
 947         ev_file = container_of(uobj, struct ib_uverbs_completion_event_file,
 948                                uobj_file.uobj);
 949         ib_uverbs_init_event_queue(&ev_file->ev_queue);
 950
 951         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
 952                 uobj_alloc_abort(uobj);
 953                 return -EFAULT;
 954         }
 955
 956         uobj_alloc_commit(uobj);
 957         return in_len;
 958 }
 959
 960 static struct ib_ucq_object *create_cq(struct ib_uverbs_file *file,
 961                                         struct ib_device *ib_dev,
 962                                        struct ib_udata *ucore,
 963                                        struct ib_udata *uhw,
 964                                        struct ib_uverbs_ex_create_cq *cmd,
 965                                        size_t cmd_sz,
 966                                        int (*cb)(struct ib_uverbs_file *file,
 967                                                  struct ib_ucq_object *obj,
 968                                                  struct ib_uverbs_ex_create_cq_resp *resp,
 969                                                  struct ib_udata *udata,
 970                                                  void *context),
 971                                        void *context)
 972 {
 973         struct ib_ucq_object           *obj;
 974         struct ib_uverbs_completion_event_file    *ev_file = NULL;
 975         struct ib_cq                   *cq;
 976         int                             ret;
 977         struct ib_uverbs_ex_create_cq_resp resp;
 978         struct ib_cq_init_attr attr = {};
 979
 980         if (cmd->comp_vector >= file->device->num_comp_vectors)
 981                 return ERR_PTR(-EINVAL);
 982
 983         obj  = (struct ib_ucq_object *)uobj_alloc(uobj_get_type(cq),
 984                                                   file->ucontext);
 985         if (IS_ERR(obj))
 986                 return obj;
 987
 988         if (cmd->comp_channel >= 0) {
 989                 ev_file = ib_uverbs_lookup_comp_file(cmd->comp_channel,
 990                                                      file->ucontext);
 991                 if (IS_ERR(ev_file)) {
 992                         ret = PTR_ERR(ev_file);
 993                         goto err;
 994                 }
 995         }
 996
 997         obj->uobject.user_handle = cmd->user_handle;
 998         obj->uverbs_file           = file;
 999         obj->comp_events_reported  = 0;
1000         obj->async_events_reported = 0;
1001         INIT_LIST_HEAD(&obj->comp_list);
1002         INIT_LIST_HEAD(&obj->async_list);
1003
1004         attr.cqe = cmd->cqe;
1005         attr.comp_vector = cmd->comp_vector;
1006
1007         if (cmd_sz > offsetof(typeof(*cmd), flags) + sizeof(cmd->flags))
1008                 attr.flags = cmd->flags;
1009
1010         cq = ib_dev->create_cq(ib_dev, &attr, file->ucontext, uhw);
1011         if (IS_ERR(cq)) {
1012                 ret = PTR_ERR(cq);
1013                 goto err_file;
1014         }
1015
1016         cq->device        = ib_dev;
1017         cq->uobject       = &obj->uobject;
1018         cq->comp_handler  = ib_uverbs_comp_handler;
1019         cq->event_handler = ib_uverbs_cq_event_handler;
1020         cq->cq_context    = ev_file ? &ev_file->ev_queue : NULL;
1021         atomic_set(&cq->usecnt, 0);
1022
1023         obj->uobject.object = cq;
1024         memset(&resp, 0, sizeof resp);
1025         resp.base.cq_handle = obj->uobject.id;
1026         resp.base.cqe       = cq->cqe;
1027
1028         resp.response_length = offsetof(typeof(resp), response_length) +
1029                 sizeof(resp.response_length);
1030
1031         ret = cb(file, obj, &resp, ucore, context);
1032         if (ret)
1033                 goto err_cb;
1034
1035         uobj_alloc_commit(&obj->uobject);
1036
1037         return obj;
1038
1039 err_cb:
1040         ib_destroy_cq(cq);
1041
1042 err_file:
1043         if (ev_file)
1044                 ib_uverbs_release_ucq(file, ev_file, obj);
1045
1046 err:
1047         uobj_alloc_abort(&obj->uobject);
1048
1049         return ERR_PTR(ret);
1050 }
1051
1052 static int ib_uverbs_create_cq_cb(struct ib_uverbs_file *file,
1053                                   struct ib_ucq_object *obj,
1054                                   struct ib_uverbs_ex_create_cq_resp *resp,
1055                                   struct ib_udata *ucore, void *context)
1056 {
1057         if (ib_copy_to_udata(ucore, &resp->base, sizeof(resp->base)))
1058                 return -EFAULT;
1059
1060         return 0;
1061 }
1062
1063 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
1064                             struct ib_device *ib_dev,
1065                             const char __user *buf, int in_len,
1066                             int out_len)
1067 {
1068         struct ib_uverbs_create_cq      cmd;
1069         struct ib_uverbs_ex_create_cq   cmd_ex;
1070         struct ib_uverbs_create_cq_resp resp;
1071         struct ib_udata                 ucore;
1072         struct ib_udata                 uhw;
1073         struct ib_ucq_object           *obj;
1074
1075         if (out_len < sizeof(resp))
1076                 return -ENOSPC;
1077
1078         if (copy_from_user(&cmd, buf, sizeof(cmd)))
1079                 return -EFAULT;
1080
1081         ib_uverbs_init_udata(&ucore, buf, u64_to_user_ptr(cmd.response),
1082                              sizeof(cmd), sizeof(resp));
1083
1084         ib_uverbs_init_udata(&uhw, buf + sizeof(cmd),
1085                    u64_to_user_ptr(cmd.response) + sizeof(resp),
1086                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
1087                    out_len - sizeof(resp));
1088
1089         memset(&cmd_ex, 0, sizeof(cmd_ex));
1090         cmd_ex.user_handle = cmd.user_handle;
1091         cmd_ex.cqe = cmd.cqe;
1092         cmd_ex.comp_vector = cmd.comp_vector;
1093         cmd_ex.comp_channel = cmd.comp_channel;
1094
1095         obj = create_cq(file, ib_dev, &ucore, &uhw, &cmd_ex,
1096                         offsetof(typeof(cmd_ex), comp_channel) +
1097                         sizeof(cmd.comp_channel), ib_uverbs_create_cq_cb,
1098                         NULL);
1099
1100         if (IS_ERR(obj))
1101                 return PTR_ERR(obj);
1102
1103         return in_len;
1104 }
1105
1106 static int ib_uverbs_ex_create_cq_cb(struct ib_uverbs_file *file,
1107                                      struct ib_ucq_object *obj,
1108                                      struct ib_uverbs_ex_create_cq_resp *resp,
1109                                      struct ib_udata *ucore, void *context)
1110 {
1111         if (ib_copy_to_udata(ucore, resp, resp->response_length))
1112                 return -EFAULT;
1113
1114         return 0;
1115 }
1116
1117 int ib_uverbs_ex_create_cq(struct ib_uverbs_file *file,
1118                          struct ib_device *ib_dev,
1119                            struct ib_udata *ucore,
1120                            struct ib_udata *uhw)
1121 {
1122         struct ib_uverbs_ex_create_cq_resp resp;
1123         struct ib_uverbs_ex_create_cq  cmd;
1124         struct ib_ucq_object           *obj;
1125         int err;
1126
1127         if (ucore->inlen < sizeof(cmd))
1128                 return -EINVAL;
1129
1130         err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
1131         if (err)
1132                 return err;
1133
1134         if (cmd.comp_mask)
1135                 return -EINVAL;
1136
1137         if (cmd.reserved)
1138                 return -EINVAL;
1139
1140         if (ucore->outlen < (offsetof(typeof(resp), response_length) +
1141                              sizeof(resp.response_length)))
1142                 return -ENOSPC;
1143
1144         obj = create_cq(file, ib_dev, ucore, uhw, &cmd,
1145                         min(ucore->inlen, sizeof(cmd)),
1146                         ib_uverbs_ex_create_cq_cb, NULL);
1147
1148         if (IS_ERR(obj))
1149                 return PTR_ERR(obj);
1150
1151         return 0;
1152 }
1153
1154 ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
1155                             struct ib_device *ib_dev,
1156                             const char __user *buf, int in_len,
1157                             int out_len)
1158 {
1159         struct ib_uverbs_resize_cq      cmd;
1160         struct ib_uverbs_resize_cq_resp resp = {};
1161         struct ib_udata                 udata;
1162         struct ib_cq                    *cq;
1163         int                             ret = -EINVAL;
1164
1165         if (copy_from_user(&cmd, buf, sizeof cmd))
1166                 return -EFAULT;
1167
1168         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
1169                    u64_to_user_ptr(cmd.response) + sizeof(resp),
1170                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
1171                    out_len - sizeof(resp));
1172
1173         cq = uobj_get_obj_read(cq, cmd.cq_handle, file->ucontext);
1174         if (!cq)
1175                 return -EINVAL;
1176
1177         ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
1178         if (ret)
1179                 goto out;
1180
1181         resp.cqe = cq->cqe;
1182
1183         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp.cqe))
1184                 ret = -EFAULT;
1185
1186 out:
1187         uobj_put_obj_read(cq);
1188
1189         return ret ? ret : in_len;
1190 }
1191
1192 static int copy_wc_to_user(struct ib_device *ib_dev, void __user *dest,
1193                            struct ib_wc *wc)
1194 {
1195         struct ib_uverbs_wc tmp;
1196
1197         tmp.wr_id               = wc->wr_id;
1198         tmp.status              = wc->status;
1199         tmp.opcode              = wc->opcode;
1200         tmp.vendor_err          = wc->vendor_err;
1201         tmp.byte_len            = wc->byte_len;
1202         tmp.ex.imm_data         = (__u32 __force) wc->ex.imm_data;
1203         tmp.qp_num              = wc->qp->qp_num;
1204         tmp.src_qp              = wc->src_qp;
1205         tmp.wc_flags            = wc->wc_flags;
1206         tmp.pkey_index          = wc->pkey_index;
1207         if (rdma_cap_opa_ah(ib_dev, wc->port_num))
1208                 tmp.slid        = OPA_TO_IB_UCAST_LID(wc->slid);
1209         else
1210                 tmp.slid        = ib_lid_cpu16(wc->slid);
1211         tmp.sl                  = wc->sl;
1212         tmp.dlid_path_bits      = wc->dlid_path_bits;
1213         tmp.port_num            = wc->port_num;
1214         tmp.reserved            = 0;
1215
1216         if (copy_to_user(dest, &tmp, sizeof tmp))
1217                 return -EFAULT;
1218
1219         return 0;
1220 }
1221
1222 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
1223                           struct ib_device *ib_dev,
1224                           const char __user *buf, int in_len,
1225                           int out_len)
1226 {
1227         struct ib_uverbs_poll_cq       cmd;
1228         struct ib_uverbs_poll_cq_resp  resp;
1229         u8 __user                     *header_ptr;
1230         u8 __user                     *data_ptr;
1231         struct ib_cq                  *cq;
1232         struct ib_wc                   wc;
1233         int                            ret;
1234
1235         if (copy_from_user(&cmd, buf, sizeof cmd))
1236                 return -EFAULT;
1237
1238         cq = uobj_get_obj_read(cq, cmd.cq_handle, file->ucontext);
1239         if (!cq)
1240                 return -EINVAL;
1241
1242         /* we copy a struct ib_uverbs_poll_cq_resp to user space */
1243         header_ptr = u64_to_user_ptr(cmd.response);
1244         data_ptr = header_ptr + sizeof resp;
1245
1246         memset(&resp, 0, sizeof resp);
1247         while (resp.count < cmd.ne) {
1248                 ret = ib_poll_cq(cq, 1, &wc);
1249                 if (ret < 0)
1250                         goto out_put;
1251                 if (!ret)
1252                         break;
1253
1254                 ret = copy_wc_to_user(ib_dev, data_ptr, &wc);
1255                 if (ret)
1256                         goto out_put;
1257
1258                 data_ptr += sizeof(struct ib_uverbs_wc);
1259                 ++resp.count;
1260         }
1261
1262         if (copy_to_user(header_ptr, &resp, sizeof resp)) {
1263                 ret = -EFAULT;
1264                 goto out_put;
1265         }
1266
1267         ret = in_len;
1268
1269 out_put:
1270         uobj_put_obj_read(cq);
1271         return ret;
1272 }
1273
1274 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
1275                                 struct ib_device *ib_dev,
1276                                 const char __user *buf, int in_len,
1277                                 int out_len)
1278 {
1279         struct ib_uverbs_req_notify_cq cmd;
1280         struct ib_cq                  *cq;
1281
1282         if (copy_from_user(&cmd, buf, sizeof cmd))
1283                 return -EFAULT;
1284
1285         cq = uobj_get_obj_read(cq, cmd.cq_handle, file->ucontext);
1286         if (!cq)
1287                 return -EINVAL;
1288
1289         ib_req_notify_cq(cq, cmd.solicited_only ?
1290                          IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
1291
1292         uobj_put_obj_read(cq);
1293
1294         return in_len;
1295 }
1296
1297 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
1298                              struct ib_device *ib_dev,
1299                              const char __user *buf, int in_len,
1300                              int out_len)
1301 {
1302         struct ib_uverbs_destroy_cq      cmd;
1303         struct ib_uverbs_destroy_cq_resp resp;
1304         struct ib_uobject               *uobj;
1305         struct ib_cq                    *cq;
1306         struct ib_ucq_object            *obj;
1307         int                              ret = -EINVAL;
1308
1309         if (copy_from_user(&cmd, buf, sizeof cmd))
1310                 return -EFAULT;
1311
1312         uobj  = uobj_get_write(uobj_get_type(cq), cmd.cq_handle,
1313                                file->ucontext);
1314         if (IS_ERR(uobj))
1315                 return PTR_ERR(uobj);
1316
1317         /*
1318          * Make sure we don't free the memory in remove_commit as we still
1319          * needs the uobject memory to create the response.
1320          */
1321         uverbs_uobject_get(uobj);
1322         cq      = uobj->object;
1323         obj     = container_of(cq->uobject, struct ib_ucq_object, uobject);
1324
1325         memset(&resp, 0, sizeof(resp));
1326
1327         ret = uobj_remove_commit(uobj);
1328         if (ret) {
1329                 uverbs_uobject_put(uobj);
1330                 return ret;
1331         }
1332
1333         resp.comp_events_reported  = obj->comp_events_reported;
1334         resp.async_events_reported = obj->async_events_reported;
1335
1336         uverbs_uobject_put(uobj);
1337         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
1338                 return -EFAULT;
1339
1340         return in_len;
1341 }
1342
1343 static int create_qp(struct ib_uverbs_file *file,
1344                      struct ib_udata *ucore,
1345                      struct ib_udata *uhw,
1346                      struct ib_uverbs_ex_create_qp *cmd,
1347                      size_t cmd_sz,
1348                      int (*cb)(struct ib_uverbs_file *file,
1349                                struct ib_uverbs_ex_create_qp_resp *resp,
1350                                struct ib_udata *udata),
1351                      void *context)
1352 {
1353         struct ib_uqp_object            *obj;
1354         struct ib_device                *device;
1355         struct ib_pd                    *pd = NULL;
1356         struct ib_xrcd                  *xrcd = NULL;
1357         struct ib_uobject               *xrcd_uobj = ERR_PTR(-ENOENT);
1358         struct ib_cq                    *scq = NULL, *rcq = NULL;
1359         struct ib_srq                   *srq = NULL;
1360         struct ib_qp                    *qp;
1361         char                            *buf;
1362         struct ib_qp_init_attr          attr = {};
1363         struct ib_uverbs_ex_create_qp_resp resp;
1364         int                             ret;
1365         struct ib_rwq_ind_table *ind_tbl = NULL;
1366         bool has_sq = true;
1367
1368         if (cmd->qp_type == IB_QPT_RAW_PACKET && !capable(CAP_NET_RAW))
1369                 return -EPERM;
1370
1371         obj  = (struct ib_uqp_object *)uobj_alloc(uobj_get_type(qp),
1372                                                   file->ucontext);
1373         if (IS_ERR(obj))
1374                 return PTR_ERR(obj);
1375         obj->uxrcd = NULL;
1376         obj->uevent.uobject.user_handle = cmd->user_handle;
1377         mutex_init(&obj->mcast_lock);
1378
1379         if (cmd_sz >= offsetof(typeof(*cmd), rwq_ind_tbl_handle) +
1380                       sizeof(cmd->rwq_ind_tbl_handle) &&
1381                       (cmd->comp_mask & IB_UVERBS_CREATE_QP_MASK_IND_TABLE)) {
1382                 ind_tbl = uobj_get_obj_read(rwq_ind_table,
1383                                             cmd->rwq_ind_tbl_handle,
1384                                             file->ucontext);
1385                 if (!ind_tbl) {
1386                         ret = -EINVAL;
1387                         goto err_put;
1388                 }
1389
1390                 attr.rwq_ind_tbl = ind_tbl;
1391         }
1392
1393         if (cmd_sz > sizeof(*cmd) &&
1394             !ib_is_udata_cleared(ucore, sizeof(*cmd),
1395                                  cmd_sz - sizeof(*cmd))) {
1396                 ret = -EOPNOTSUPP;
1397                 goto err_put;
1398         }
1399
1400         if (ind_tbl && (cmd->max_recv_wr || cmd->max_recv_sge || cmd->is_srq)) {
1401                 ret = -EINVAL;
1402                 goto err_put;
1403         }
1404
1405         if (ind_tbl && !cmd->max_send_wr)
1406                 has_sq = false;
1407
1408         if (cmd->qp_type == IB_QPT_XRC_TGT) {
1409                 xrcd_uobj = uobj_get_read(uobj_get_type(xrcd), cmd->pd_handle,
1410                                           file->ucontext);
1411
1412                 if (IS_ERR(xrcd_uobj)) {
1413                         ret = -EINVAL;
1414                         goto err_put;
1415                 }
1416
1417                 xrcd = (struct ib_xrcd *)xrcd_uobj->object;
1418                 if (!xrcd) {
1419                         ret = -EINVAL;
1420                         goto err_put;
1421                 }
1422                 device = xrcd->device;
1423         } else {
1424                 if (cmd->qp_type == IB_QPT_XRC_INI) {
1425                         cmd->max_recv_wr = 0;
1426                         cmd->max_recv_sge = 0;
1427                 } else {
1428                         if (cmd->is_srq) {
1429                                 srq = uobj_get_obj_read(srq, cmd->srq_handle,
1430                                                         file->ucontext);
1431                                 if (!srq || srq->srq_type == IB_SRQT_XRC) {
1432                                         ret = -EINVAL;
1433                                         goto err_put;
1434                                 }
1435                         }
1436
1437                         if (!ind_tbl) {
1438                                 if (cmd->recv_cq_handle != cmd->send_cq_handle) {
1439                                         rcq = uobj_get_obj_read(cq, cmd->recv_cq_handle,
1440                                                                 file->ucontext);
1441                                         if (!rcq) {
1442                                                 ret = -EINVAL;
1443                                                 goto err_put;
1444                                         }
1445                                 }
1446                         }
1447                 }
1448
1449                 if (has_sq)
1450                         scq = uobj_get_obj_read(cq, cmd->send_cq_handle,
1451                                                 file->ucontext);
1452                 if (!ind_tbl)
1453                         rcq = rcq ?: scq;
1454                 pd  = uobj_get_obj_read(pd, cmd->pd_handle, file->ucontext);
1455                 if (!pd || (!scq && has_sq)) {
1456                         ret = -EINVAL;
1457                         goto err_put;
1458                 }
1459
1460                 device = pd->device;
1461         }
1462
1463         attr.event_handler = ib_uverbs_qp_event_handler;
1464         attr.qp_context    = file;
1465         attr.send_cq       = scq;
1466         attr.recv_cq       = rcq;
1467         attr.srq           = srq;
1468         attr.xrcd          = xrcd;
1469         attr.sq_sig_type   = cmd->sq_sig_all ? IB_SIGNAL_ALL_WR :
1470                                               IB_SIGNAL_REQ_WR;
1471         attr.qp_type       = cmd->qp_type;
1472         attr.create_flags  = 0;
1473
1474         attr.cap.max_send_wr     = cmd->max_send_wr;
1475         attr.cap.max_recv_wr     = cmd->max_recv_wr;
1476         attr.cap.max_send_sge    = cmd->max_send_sge;
1477         attr.cap.max_recv_sge    = cmd->max_recv_sge;
1478         attr.cap.max_inline_data = cmd->max_inline_data;
1479
1480         obj->uevent.events_reported     = 0;
1481         INIT_LIST_HEAD(&obj->uevent.event_list);
1482         INIT_LIST_HEAD(&obj->mcast_list);
1483
1484         if (cmd_sz >= offsetof(typeof(*cmd), create_flags) +
1485                       sizeof(cmd->create_flags))
1486                 attr.create_flags = cmd->create_flags;
1487
1488         if (attr.create_flags & ~(IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK |
1489                                 IB_QP_CREATE_CROSS_CHANNEL |
1490                                 IB_QP_CREATE_MANAGED_SEND |
1491                                 IB_QP_CREATE_MANAGED_RECV |
1492                                 IB_QP_CREATE_SCATTER_FCS |
1493                                 IB_QP_CREATE_CVLAN_STRIPPING |
1494                                 IB_QP_CREATE_SOURCE_QPN |
1495                                 IB_QP_CREATE_PCI_WRITE_END_PADDING)) {
1496                 ret = -EINVAL;
1497                 goto err_put;
1498         }
1499
1500         if (attr.create_flags & IB_QP_CREATE_SOURCE_QPN) {
1501                 if (!capable(CAP_NET_RAW)) {
1502                         ret = -EPERM;
1503                         goto err_put;
1504                 }
1505
1506                 attr.source_qpn = cmd->source_qpn;
1507         }
1508
1509         buf = (void *)cmd + sizeof(*cmd);
1510         if (cmd_sz > sizeof(*cmd))
1511                 if (!(buf[0] == 0 && !memcmp(buf, buf + 1,
1512                                              cmd_sz - sizeof(*cmd) - 1))) {
1513                         ret = -EINVAL;
1514                         goto err_put;
1515                 }
1516
1517         if (cmd->qp_type == IB_QPT_XRC_TGT)
1518                 qp = ib_create_qp(pd, &attr);
1519         else
1520                 qp = device->create_qp(pd, &attr, uhw);
1521
1522         if (IS_ERR(qp)) {
1523                 ret = PTR_ERR(qp);
1524                 goto err_put;
1525         }
1526
1527         if (cmd->qp_type != IB_QPT_XRC_TGT) {
1528                 ret = ib_create_qp_security(qp, device);
1529                 if (ret)
1530                         goto err_cb;
1531
1532                 qp->real_qp       = qp;
1533                 qp->device        = device;
1534                 qp->pd            = pd;
1535                 qp->send_cq       = attr.send_cq;
1536                 qp->recv_cq       = attr.recv_cq;
1537                 qp->srq           = attr.srq;
1538                 qp->rwq_ind_tbl   = ind_tbl;
1539                 qp->event_handler = attr.event_handler;
1540                 qp->qp_context    = attr.qp_context;
1541                 qp->qp_type       = attr.qp_type;
1542                 atomic_set(&qp->usecnt, 0);
1543                 atomic_inc(&pd->usecnt);
1544                 qp->port = 0;
1545                 if (attr.send_cq)
1546                         atomic_inc(&attr.send_cq->usecnt);
1547                 if (attr.recv_cq)
1548                         atomic_inc(&attr.recv_cq->usecnt);
1549                 if (attr.srq)
1550                         atomic_inc(&attr.srq->usecnt);
1551                 if (ind_tbl)
1552                         atomic_inc(&ind_tbl->usecnt);
1553         }
1554         qp->uobject = &obj->uevent.uobject;
1555
1556         obj->uevent.uobject.object = qp;
1557
1558         memset(&resp, 0, sizeof resp);
1559         resp.base.qpn             = qp->qp_num;
1560         resp.base.qp_handle       = obj->uevent.uobject.id;
1561         resp.base.max_recv_sge    = attr.cap.max_recv_sge;
1562         resp.base.max_send_sge    = attr.cap.max_send_sge;
1563         resp.base.max_recv_wr     = attr.cap.max_recv_wr;
1564         resp.base.max_send_wr     = attr.cap.max_send_wr;
1565         resp.base.max_inline_data = attr.cap.max_inline_data;
1566
1567         resp.response_length = offsetof(typeof(resp), response_length) +
1568                                sizeof(resp.response_length);
1569
1570         ret = cb(file, &resp, ucore);
1571         if (ret)
1572                 goto err_cb;
1573
1574         if (xrcd) {
1575                 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object,
1576                                           uobject);
1577                 atomic_inc(&obj->uxrcd->refcnt);
1578                 uobj_put_read(xrcd_uobj);
1579         }
1580
1581         if (pd)
1582                 uobj_put_obj_read(pd);
1583         if (scq)
1584                 uobj_put_obj_read(scq);
1585         if (rcq && rcq != scq)
1586                 uobj_put_obj_read(rcq);
1587         if (srq)
1588                 uobj_put_obj_read(srq);
1589         if (ind_tbl)
1590                 uobj_put_obj_read(ind_tbl);
1591
1592         uobj_alloc_commit(&obj->uevent.uobject);
1593
1594         return 0;
1595 err_cb:
1596         ib_destroy_qp(qp);
1597
1598 err_put:
1599         if (!IS_ERR(xrcd_uobj))
1600                 uobj_put_read(xrcd_uobj);
1601         if (pd)
1602                 uobj_put_obj_read(pd);
1603         if (scq)
1604                 uobj_put_obj_read(scq);
1605         if (rcq && rcq != scq)
1606                 uobj_put_obj_read(rcq);
1607         if (srq)
1608                 uobj_put_obj_read(srq);
1609         if (ind_tbl)
1610                 uobj_put_obj_read(ind_tbl);
1611
1612         uobj_alloc_abort(&obj->uevent.uobject);
1613         return ret;
1614 }
1615
1616 static int ib_uverbs_create_qp_cb(struct ib_uverbs_file *file,
1617                                   struct ib_uverbs_ex_create_qp_resp *resp,
1618                                   struct ib_udata *ucore)
1619 {
1620         if (ib_copy_to_udata(ucore, &resp->base, sizeof(resp->base)))
1621                 return -EFAULT;
1622
1623         return 0;
1624 }
1625
1626 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1627                             struct ib_device *ib_dev,
1628                             const char __user *buf, int in_len,
1629                             int out_len)
1630 {
1631         struct ib_uverbs_create_qp      cmd;
1632         struct ib_uverbs_ex_create_qp   cmd_ex;
1633         struct ib_udata                 ucore;
1634         struct ib_udata                 uhw;
1635         ssize_t resp_size = sizeof(struct ib_uverbs_create_qp_resp);
1636         int                             err;
1637
1638         if (out_len < resp_size)
1639                 return -ENOSPC;
1640
1641         if (copy_from_user(&cmd, buf, sizeof(cmd)))
1642                 return -EFAULT;
1643
1644         ib_uverbs_init_udata(&ucore, buf, u64_to_user_ptr(cmd.response),
1645                    sizeof(cmd), resp_size);
1646         ib_uverbs_init_udata(&uhw, buf + sizeof(cmd),
1647                    u64_to_user_ptr(cmd.response) + resp_size,
1648                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
1649                    out_len - resp_size);
1650
1651         memset(&cmd_ex, 0, sizeof(cmd_ex));
1652         cmd_ex.user_handle = cmd.user_handle;
1653         cmd_ex.pd_handle = cmd.pd_handle;
1654         cmd_ex.send_cq_handle = cmd.send_cq_handle;
1655         cmd_ex.recv_cq_handle = cmd.recv_cq_handle;
1656         cmd_ex.srq_handle = cmd.srq_handle;
1657         cmd_ex.max_send_wr = cmd.max_send_wr;
1658         cmd_ex.max_recv_wr = cmd.max_recv_wr;
1659         cmd_ex.max_send_sge = cmd.max_send_sge;
1660         cmd_ex.max_recv_sge = cmd.max_recv_sge;
1661         cmd_ex.max_inline_data = cmd.max_inline_data;
1662         cmd_ex.sq_sig_all = cmd.sq_sig_all;
1663         cmd_ex.qp_type = cmd.qp_type;
1664         cmd_ex.is_srq = cmd.is_srq;
1665
1666         err = create_qp(file, &ucore, &uhw, &cmd_ex,
1667                         offsetof(typeof(cmd_ex), is_srq) +
1668                         sizeof(cmd.is_srq), ib_uverbs_create_qp_cb,
1669                         NULL);
1670
1671         if (err)
1672                 return err;
1673
1674         return in_len;
1675 }
1676
1677 static int ib_uverbs_ex_create_qp_cb(struct ib_uverbs_file *file,
1678                                      struct ib_uverbs_ex_create_qp_resp *resp,
1679                                      struct ib_udata *ucore)
1680 {
1681         if (ib_copy_to_udata(ucore, resp, resp->response_length))
1682                 return -EFAULT;
1683
1684         return 0;
1685 }
1686
1687 int ib_uverbs_ex_create_qp(struct ib_uverbs_file *file,
1688                            struct ib_device *ib_dev,
1689                            struct ib_udata *ucore,
1690                            struct ib_udata *uhw)
1691 {
1692         struct ib_uverbs_ex_create_qp_resp resp;
1693         struct ib_uverbs_ex_create_qp cmd = {0};
1694         int err;
1695
1696         if (ucore->inlen < (offsetof(typeof(cmd), comp_mask) +
1697                             sizeof(cmd.comp_mask)))
1698                 return -EINVAL;
1699
1700         err = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
1701         if (err)
1702                 return err;
1703
1704         if (cmd.comp_mask & ~IB_UVERBS_CREATE_QP_SUP_COMP_MASK)
1705                 return -EINVAL;
1706
1707         if (cmd.reserved)
1708                 return -EINVAL;
1709
1710         if (ucore->outlen < (offsetof(typeof(resp), response_length) +
1711                              sizeof(resp.response_length)))
1712                 return -ENOSPC;
1713
1714         err = create_qp(file, ucore, uhw, &cmd,
1715                         min(ucore->inlen, sizeof(cmd)),
1716                         ib_uverbs_ex_create_qp_cb, NULL);
1717
1718         if (err)
1719                 return err;
1720
1721         return 0;
1722 }
1723
1724 ssize_t ib_uverbs_open_qp(struct ib_uverbs_file *file,
1725                           struct ib_device *ib_dev,
1726                           const char __user *buf, int in_len, int out_len)
1727 {
1728         struct ib_uverbs_open_qp        cmd;
1729         struct ib_uverbs_create_qp_resp resp;
1730         struct ib_udata                 udata;
1731         struct ib_uqp_object           *obj;
1732         struct ib_xrcd                 *xrcd;
1733         struct ib_uobject              *uninitialized_var(xrcd_uobj);
1734         struct ib_qp                   *qp;
1735         struct ib_qp_open_attr          attr;
1736         int ret;
1737
1738         if (out_len < sizeof resp)
1739                 return -ENOSPC;
1740
1741         if (copy_from_user(&cmd, buf, sizeof cmd))
1742                 return -EFAULT;
1743
1744         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
1745                    u64_to_user_ptr(cmd.response) + sizeof(resp),
1746                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
1747                    out_len - sizeof(resp));
1748
1749         obj  = (struct ib_uqp_object *)uobj_alloc(uobj_get_type(qp),
1750                                                   file->ucontext);
1751         if (IS_ERR(obj))
1752                 return PTR_ERR(obj);
1753
1754         xrcd_uobj = uobj_get_read(uobj_get_type(xrcd), cmd.pd_handle,
1755                                   file->ucontext);
1756         if (IS_ERR(xrcd_uobj)) {
1757                 ret = -EINVAL;
1758                 goto err_put;
1759         }
1760
1761         xrcd = (struct ib_xrcd *)xrcd_uobj->object;
1762         if (!xrcd) {
1763                 ret = -EINVAL;
1764                 goto err_xrcd;
1765         }
1766
1767         attr.event_handler = ib_uverbs_qp_event_handler;
1768         attr.qp_context    = file;
1769         attr.qp_num        = cmd.qpn;
1770         attr.qp_type       = cmd.qp_type;
1771
1772         obj->uevent.events_reported = 0;
1773         INIT_LIST_HEAD(&obj->uevent.event_list);
1774         INIT_LIST_HEAD(&obj->mcast_list);
1775
1776         qp = ib_open_qp(xrcd, &attr);
1777         if (IS_ERR(qp)) {
1778                 ret = PTR_ERR(qp);
1779                 goto err_xrcd;
1780         }
1781
1782         obj->uevent.uobject.object = qp;
1783         obj->uevent.uobject.user_handle = cmd.user_handle;
1784
1785         memset(&resp, 0, sizeof resp);
1786         resp.qpn       = qp->qp_num;
1787         resp.qp_handle = obj->uevent.uobject.id;
1788
1789         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
1790                 ret = -EFAULT;
1791                 goto err_destroy;
1792         }
1793
1794         obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
1795         atomic_inc(&obj->uxrcd->refcnt);
1796         qp->uobject = &obj->uevent.uobject;
1797         uobj_put_read(xrcd_uobj);
1798
1799
1800         uobj_alloc_commit(&obj->uevent.uobject);
1801
1802         return in_len;
1803
1804 err_destroy:
1805         ib_destroy_qp(qp);
1806 err_xrcd:
1807         uobj_put_read(xrcd_uobj);
1808 err_put:
1809         uobj_alloc_abort(&obj->uevent.uobject);
1810         return ret;
1811 }
1812
1813 static void copy_ah_attr_to_uverbs(struct ib_uverbs_qp_dest *uverb_attr,
1814                                    struct rdma_ah_attr *rdma_attr)
1815 {
1816         const struct ib_global_route   *grh;
1817
1818         uverb_attr->dlid              = rdma_ah_get_dlid(rdma_attr);
1819         uverb_attr->sl                = rdma_ah_get_sl(rdma_attr);
1820         uverb_attr->src_path_bits     = rdma_ah_get_path_bits(rdma_attr);
1821         uverb_attr->static_rate       = rdma_ah_get_static_rate(rdma_attr);
1822         uverb_attr->is_global         = !!(rdma_ah_get_ah_flags(rdma_attr) &
1823                                          IB_AH_GRH);
1824         if (uverb_attr->is_global) {
1825                 grh = rdma_ah_read_grh(rdma_attr);
1826                 memcpy(uverb_attr->dgid, grh->dgid.raw, 16);
1827                 uverb_attr->flow_label        = grh->flow_label;
1828                 uverb_attr->sgid_index        = grh->sgid_index;
1829                 uverb_attr->hop_limit         = grh->hop_limit;
1830                 uverb_attr->traffic_class     = grh->traffic_class;
1831         }
1832         uverb_attr->port_num          = rdma_ah_get_port_num(rdma_attr);
1833 }
1834
1835 ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
1836                            struct ib_device *ib_dev,
1837                            const char __user *buf, int in_len,
1838                            int out_len)
1839 {
1840         struct ib_uverbs_query_qp      cmd;
1841         struct ib_uverbs_query_qp_resp resp;
1842         struct ib_qp                   *qp;
1843         struct ib_qp_attr              *attr;
1844         struct ib_qp_init_attr         *init_attr;
1845         int                            ret;
1846
1847         if (copy_from_user(&cmd, buf, sizeof cmd))
1848                 return -EFAULT;
1849
1850         attr      = kmalloc(sizeof *attr, GFP_KERNEL);
1851         init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1852         if (!attr || !init_attr) {
1853                 ret = -ENOMEM;
1854                 goto out;
1855         }
1856
1857         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
1858         if (!qp) {
1859                 ret = -EINVAL;
1860                 goto out;
1861         }
1862
1863         ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1864
1865         uobj_put_obj_read(qp);
1866
1867         if (ret)
1868                 goto out;
1869
1870         memset(&resp, 0, sizeof resp);
1871
1872         resp.qp_state               = attr->qp_state;
1873         resp.cur_qp_state           = attr->cur_qp_state;
1874         resp.path_mtu               = attr->path_mtu;
1875         resp.path_mig_state         = attr->path_mig_state;
1876         resp.qkey                   = attr->qkey;
1877         resp.rq_psn                 = attr->rq_psn;
1878         resp.sq_psn                 = attr->sq_psn;
1879         resp.dest_qp_num            = attr->dest_qp_num;
1880         resp.qp_access_flags        = attr->qp_access_flags;
1881         resp.pkey_index             = attr->pkey_index;
1882         resp.alt_pkey_index         = attr->alt_pkey_index;
1883         resp.sq_draining            = attr->sq_draining;
1884         resp.max_rd_atomic          = attr->max_rd_atomic;
1885         resp.max_dest_rd_atomic     = attr->max_dest_rd_atomic;
1886         resp.min_rnr_timer          = attr->min_rnr_timer;
1887         resp.port_num               = attr->port_num;
1888         resp.timeout                = attr->timeout;
1889         resp.retry_cnt              = attr->retry_cnt;
1890         resp.rnr_retry              = attr->rnr_retry;
1891         resp.alt_port_num           = attr->alt_port_num;
1892         resp.alt_timeout            = attr->alt_timeout;
1893
1894         copy_ah_attr_to_uverbs(&resp.dest, &attr->ah_attr);
1895         copy_ah_attr_to_uverbs(&resp.alt_dest, &attr->alt_ah_attr);
1896
1897         resp.max_send_wr            = init_attr->cap.max_send_wr;
1898         resp.max_recv_wr            = init_attr->cap.max_recv_wr;
1899         resp.max_send_sge           = init_attr->cap.max_send_sge;
1900         resp.max_recv_sge           = init_attr->cap.max_recv_sge;
1901         resp.max_inline_data        = init_attr->cap.max_inline_data;
1902         resp.sq_sig_all             = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1903
1904         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
1905                 ret = -EFAULT;
1906
1907 out:
1908         kfree(attr);
1909         kfree(init_attr);
1910
1911         return ret ? ret : in_len;
1912 }
1913
1914 /* Remove ignored fields set in the attribute mask */
1915 static int modify_qp_mask(enum ib_qp_type qp_type, int mask)
1916 {
1917         switch (qp_type) {
1918         case IB_QPT_XRC_INI:
1919                 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER);
1920         case IB_QPT_XRC_TGT:
1921                 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT |
1922                                 IB_QP_RNR_RETRY);
1923         default:
1924                 return mask;
1925         }
1926 }
1927
1928 static void copy_ah_attr_from_uverbs(struct ib_device *dev,
1929                                      struct rdma_ah_attr *rdma_attr,
1930                                      struct ib_uverbs_qp_dest *uverb_attr)
1931 {
1932         rdma_attr->type = rdma_ah_find_type(dev, uverb_attr->port_num);
1933         if (uverb_attr->is_global) {
1934                 rdma_ah_set_grh(rdma_attr, NULL,
1935                                 uverb_attr->flow_label,
1936                                 uverb_attr->sgid_index,
1937                                 uverb_attr->hop_limit,
1938                                 uverb_attr->traffic_class);
1939                 rdma_ah_set_dgid_raw(rdma_attr, uverb_attr->dgid);
1940         } else {
1941                 rdma_ah_set_ah_flags(rdma_attr, 0);
1942         }
1943         rdma_ah_set_dlid(rdma_attr, uverb_attr->dlid);
1944         rdma_ah_set_sl(rdma_attr, uverb_attr->sl);
1945         rdma_ah_set_path_bits(rdma_attr, uverb_attr->src_path_bits);
1946         rdma_ah_set_static_rate(rdma_attr, uverb_attr->static_rate);
1947         rdma_ah_set_port_num(rdma_attr, uverb_attr->port_num);
1948         rdma_ah_set_make_grd(rdma_attr, false);
1949 }
1950
1951 static int modify_qp(struct ib_uverbs_file *file,
1952                      struct ib_uverbs_ex_modify_qp *cmd, struct ib_udata *udata)
1953 {
1954         struct ib_qp_attr *attr;
1955         struct ib_qp *qp;
1956         int ret;
1957
1958         attr = kmalloc(sizeof *attr, GFP_KERNEL);
1959         if (!attr)
1960                 return -ENOMEM;
1961
1962         qp = uobj_get_obj_read(qp, cmd->base.qp_handle, file->ucontext);
1963         if (!qp) {
1964                 ret = -EINVAL;
1965                 goto out;
1966         }
1967
1968         if ((cmd->base.attr_mask & IB_QP_PORT) &&
1969             !rdma_is_port_valid(qp->device, cmd->base.port_num)) {
1970                 ret = -EINVAL;
1971                 goto release_qp;
1972         }
1973
1974         attr->qp_state            = cmd->base.qp_state;
1975         attr->cur_qp_state        = cmd->base.cur_qp_state;
1976         attr->path_mtu            = cmd->base.path_mtu;
1977         attr->path_mig_state      = cmd->base.path_mig_state;
1978         attr->qkey                = cmd->base.qkey;
1979         attr->rq_psn              = cmd->base.rq_psn;
1980         attr->sq_psn              = cmd->base.sq_psn;
1981         attr->dest_qp_num         = cmd->base.dest_qp_num;
1982         attr->qp_access_flags     = cmd->base.qp_access_flags;
1983         attr->pkey_index          = cmd->base.pkey_index;
1984         attr->alt_pkey_index      = cmd->base.alt_pkey_index;
1985         attr->en_sqd_async_notify = cmd->base.en_sqd_async_notify;
1986         attr->max_rd_atomic       = cmd->base.max_rd_atomic;
1987         attr->max_dest_rd_atomic  = cmd->base.max_dest_rd_atomic;
1988         attr->min_rnr_timer       = cmd->base.min_rnr_timer;
1989         attr->port_num            = cmd->base.port_num;
1990         attr->timeout             = cmd->base.timeout;
1991         attr->retry_cnt           = cmd->base.retry_cnt;
1992         attr->rnr_retry           = cmd->base.rnr_retry;
1993         attr->alt_port_num        = cmd->base.alt_port_num;
1994         attr->alt_timeout         = cmd->base.alt_timeout;
1995         attr->rate_limit          = cmd->rate_limit;
1996
1997         if (cmd->base.attr_mask & IB_QP_AV)
1998                 copy_ah_attr_from_uverbs(qp->device, &attr->ah_attr,
1999                                          &cmd->base.dest);
2000
2001         if (cmd->base.attr_mask & IB_QP_ALT_PATH)
2002                 copy_ah_attr_from_uverbs(qp->device, &attr->alt_ah_attr,
2003                                          &cmd->base.alt_dest);
2004
2005         ret = ib_modify_qp_with_udata(qp, attr,
2006                                       modify_qp_mask(qp->qp_type,
2007                                                      cmd->base.attr_mask),
2008                                       udata);
2009
2010 release_qp:
2011         uobj_put_obj_read(qp);
2012 out:
2013         kfree(attr);
2014
2015         return ret;
2016 }
2017
2018 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
2019                             struct ib_device *ib_dev,
2020                             const char __user *buf, int in_len,
2021                             int out_len)
2022 {
2023         struct ib_uverbs_ex_modify_qp cmd = {};
2024         struct ib_udata udata;
2025         int ret;
2026
2027         if (copy_from_user(&cmd.base, buf, sizeof(cmd.base)))
2028                 return -EFAULT;
2029
2030         if (cmd.base.attr_mask &
2031             ~((IB_USER_LEGACY_LAST_QP_ATTR_MASK << 1) - 1))
2032                 return -EOPNOTSUPP;
2033
2034         ib_uverbs_init_udata(&udata, buf + sizeof(cmd.base), NULL,
2035                    in_len - sizeof(cmd.base) - sizeof(struct ib_uverbs_cmd_hdr),
2036                    out_len);
2037
2038         ret = modify_qp(file, &cmd, &udata);
2039         if (ret)
2040                 return ret;
2041
2042         return in_len;
2043 }
2044
2045 int ib_uverbs_ex_modify_qp(struct ib_uverbs_file *file,
2046                            struct ib_device *ib_dev,
2047                            struct ib_udata *ucore,
2048                            struct ib_udata *uhw)
2049 {
2050         struct ib_uverbs_ex_modify_qp cmd = {};
2051         int ret;
2052
2053         /*
2054          * Last bit is reserved for extending the attr_mask by
2055          * using another field.
2056          */
2057         BUILD_BUG_ON(IB_USER_LAST_QP_ATTR_MASK == (1 << 31));
2058
2059         if (ucore->inlen < sizeof(cmd.base))
2060                 return -EINVAL;
2061
2062         ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
2063         if (ret)
2064                 return ret;
2065
2066         if (cmd.base.attr_mask &
2067             ~((IB_USER_LAST_QP_ATTR_MASK << 1) - 1))
2068                 return -EOPNOTSUPP;
2069
2070         if (ucore->inlen > sizeof(cmd)) {
2071                 if (ib_is_udata_cleared(ucore, sizeof(cmd),
2072                                         ucore->inlen - sizeof(cmd)))
2073                         return -EOPNOTSUPP;
2074         }
2075
2076         ret = modify_qp(file, &cmd, uhw);
2077
2078         return ret;
2079 }
2080
2081 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
2082                              struct ib_device *ib_dev,
2083                              const char __user *buf, int in_len,
2084                              int out_len)
2085 {
2086         struct ib_uverbs_destroy_qp      cmd;
2087         struct ib_uverbs_destroy_qp_resp resp;
2088         struct ib_uobject               *uobj;
2089         struct ib_uqp_object            *obj;
2090         int                              ret = -EINVAL;
2091
2092         if (copy_from_user(&cmd, buf, sizeof cmd))
2093                 return -EFAULT;
2094
2095         memset(&resp, 0, sizeof resp);
2096
2097         uobj  = uobj_get_write(uobj_get_type(qp), cmd.qp_handle,
2098                                file->ucontext);
2099         if (IS_ERR(uobj))
2100                 return PTR_ERR(uobj);
2101
2102         obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
2103         /*
2104          * Make sure we don't free the memory in remove_commit as we still
2105          * needs the uobject memory to create the response.
2106          */
2107         uverbs_uobject_get(uobj);
2108
2109         ret = uobj_remove_commit(uobj);
2110         if (ret) {
2111                 uverbs_uobject_put(uobj);
2112                 return ret;
2113         }
2114
2115         resp.events_reported = obj->uevent.events_reported;
2116         uverbs_uobject_put(uobj);
2117
2118         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
2119                 return -EFAULT;
2120
2121         return in_len;
2122 }
2123
2124 static void *alloc_wr(size_t wr_size, __u32 num_sge)
2125 {
2126         if (num_sge >= (U32_MAX - ALIGN(wr_size, sizeof (struct ib_sge))) /
2127                        sizeof (struct ib_sge))
2128                 return NULL;
2129
2130         return kmalloc(ALIGN(wr_size, sizeof (struct ib_sge)) +
2131                          num_sge * sizeof (struct ib_sge), GFP_KERNEL);
2132 }
2133
2134 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
2135                             struct ib_device *ib_dev,
2136                             const char __user *buf, int in_len,
2137                             int out_len)
2138 {
2139         struct ib_uverbs_post_send      cmd;
2140         struct ib_uverbs_post_send_resp resp;
2141         struct ib_uverbs_send_wr       *user_wr;
2142         struct ib_send_wr              *wr = NULL, *last, *next, *bad_wr;
2143         struct ib_qp                   *qp;
2144         int                             i, sg_ind;
2145         int                             is_ud;
2146         ssize_t                         ret = -EINVAL;
2147         size_t                          next_size;
2148
2149         if (copy_from_user(&cmd, buf, sizeof cmd))
2150                 return -EFAULT;
2151
2152         if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
2153             cmd.sge_count * sizeof (struct ib_uverbs_sge))
2154                 return -EINVAL;
2155
2156         if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
2157                 return -EINVAL;
2158
2159         user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
2160         if (!user_wr)
2161                 return -ENOMEM;
2162
2163         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
2164         if (!qp)
2165                 goto out;
2166
2167         is_ud = qp->qp_type == IB_QPT_UD;
2168         sg_ind = 0;
2169         last = NULL;
2170         for (i = 0; i < cmd.wr_count; ++i) {
2171                 if (copy_from_user(user_wr,
2172                                    buf + sizeof cmd + i * cmd.wqe_size,
2173                                    cmd.wqe_size)) {
2174                         ret = -EFAULT;
2175                         goto out_put;
2176                 }
2177
2178                 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
2179                         ret = -EINVAL;
2180                         goto out_put;
2181                 }
2182
2183                 if (is_ud) {
2184                         struct ib_ud_wr *ud;
2185
2186                         if (user_wr->opcode != IB_WR_SEND &&
2187                             user_wr->opcode != IB_WR_SEND_WITH_IMM) {
2188                                 ret = -EINVAL;
2189                                 goto out_put;
2190                         }
2191
2192                         next_size = sizeof(*ud);
2193                         ud = alloc_wr(next_size, user_wr->num_sge);
2194                         if (!ud) {
2195                                 ret = -ENOMEM;
2196                                 goto out_put;
2197                         }
2198
2199                         ud->ah = uobj_get_obj_read(ah, user_wr->wr.ud.ah,
2200                                                    file->ucontext);
2201                         if (!ud->ah) {
2202                                 kfree(ud);
2203                                 ret = -EINVAL;
2204                                 goto out_put;
2205                         }
2206                         ud->remote_qpn = user_wr->wr.ud.remote_qpn;
2207                         ud->remote_qkey = user_wr->wr.ud.remote_qkey;
2208
2209                         next = &ud->wr;
2210                 } else if (user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM ||
2211                            user_wr->opcode == IB_WR_RDMA_WRITE ||
2212                            user_wr->opcode == IB_WR_RDMA_READ) {
2213                         struct ib_rdma_wr *rdma;
2214
2215                         next_size = sizeof(*rdma);
2216                         rdma = alloc_wr(next_size, user_wr->num_sge);
2217                         if (!rdma) {
2218                                 ret = -ENOMEM;
2219                                 goto out_put;
2220                         }
2221
2222                         rdma->remote_addr = user_wr->wr.rdma.remote_addr;
2223                         rdma->rkey = user_wr->wr.rdma.rkey;
2224
2225                         next = &rdma->wr;
2226                 } else if (user_wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP ||
2227                            user_wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) {
2228                         struct ib_atomic_wr *atomic;
2229
2230                         next_size = sizeof(*atomic);
2231                         atomic = alloc_wr(next_size, user_wr->num_sge);
2232                         if (!atomic) {
2233                                 ret = -ENOMEM;
2234                                 goto out_put;
2235                         }
2236
2237                         atomic->remote_addr = user_wr->wr.atomic.remote_addr;
2238                         atomic->compare_add = user_wr->wr.atomic.compare_add;
2239                         atomic->swap = user_wr->wr.atomic.swap;
2240                         atomic->rkey = user_wr->wr.atomic.rkey;
2241
2242                         next = &atomic->wr;
2243                 } else if (user_wr->opcode == IB_WR_SEND ||
2244                            user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2245                            user_wr->opcode == IB_WR_SEND_WITH_INV) {
2246                         next_size = sizeof(*next);
2247                         next = alloc_wr(next_size, user_wr->num_sge);
2248                         if (!next) {
2249                                 ret = -ENOMEM;
2250                                 goto out_put;
2251                         }
2252                 } else {
2253                         ret = -EINVAL;
2254                         goto out_put;
2255                 }
2256
2257                 if (user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2258                     user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) {
2259                         next->ex.imm_data =
2260                                         (__be32 __force) user_wr->ex.imm_data;
2261                 } else if (user_wr->opcode == IB_WR_SEND_WITH_INV) {
2262                         next->ex.invalidate_rkey = user_wr->ex.invalidate_rkey;
2263                 }
2264
2265                 if (!last)
2266                         wr = next;
2267                 else
2268                         last->next = next;
2269                 last = next;
2270
2271                 next->next       = NULL;
2272                 next->wr_id      = user_wr->wr_id;
2273                 next->num_sge    = user_wr->num_sge;
2274                 next->opcode     = user_wr->opcode;
2275                 next->send_flags = user_wr->send_flags;
2276
2277                 if (next->num_sge) {
2278                         next->sg_list = (void *) next +
2279                                 ALIGN(next_size, sizeof(struct ib_sge));
2280                         if (copy_from_user(next->sg_list,
2281                                            buf + sizeof cmd +
2282                                            cmd.wr_count * cmd.wqe_size +
2283                                            sg_ind * sizeof (struct ib_sge),
2284                                            next->num_sge * sizeof (struct ib_sge))) {
2285                                 ret = -EFAULT;
2286                                 goto out_put;
2287                         }
2288                         sg_ind += next->num_sge;
2289                 } else
2290                         next->sg_list = NULL;
2291         }
2292
2293         resp.bad_wr = 0;
2294         ret = qp->device->post_send(qp->real_qp, wr, &bad_wr);
2295         if (ret)
2296                 for (next = wr; next; next = next->next) {
2297                         ++resp.bad_wr;
2298                         if (next == bad_wr)
2299                                 break;
2300                 }
2301
2302         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
2303                 ret = -EFAULT;
2304
2305 out_put:
2306         uobj_put_obj_read(qp);
2307
2308         while (wr) {
2309                 if (is_ud && ud_wr(wr)->ah)
2310                         uobj_put_obj_read(ud_wr(wr)->ah);
2311                 next = wr->next;
2312                 kfree(wr);
2313                 wr = next;
2314         }
2315
2316 out:
2317         kfree(user_wr);
2318
2319         return ret ? ret : in_len;
2320 }
2321
2322 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
2323                                                     int in_len,
2324                                                     u32 wr_count,
2325                                                     u32 sge_count,
2326                                                     u32 wqe_size)
2327 {
2328         struct ib_uverbs_recv_wr *user_wr;
2329         struct ib_recv_wr        *wr = NULL, *last, *next;
2330         int                       sg_ind;
2331         int                       i;
2332         int                       ret;
2333
2334         if (in_len < wqe_size * wr_count +
2335             sge_count * sizeof (struct ib_uverbs_sge))
2336                 return ERR_PTR(-EINVAL);
2337
2338         if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
2339                 return ERR_PTR(-EINVAL);
2340
2341         user_wr = kmalloc(wqe_size, GFP_KERNEL);
2342         if (!user_wr)
2343                 return ERR_PTR(-ENOMEM);
2344
2345         sg_ind = 0;
2346         last = NULL;
2347         for (i = 0; i < wr_count; ++i) {
2348                 if (copy_from_user(user_wr, buf + i * wqe_size,
2349                                    wqe_size)) {
2350                         ret = -EFAULT;
2351                         goto err;
2352                 }
2353
2354                 if (user_wr->num_sge + sg_ind > sge_count) {
2355                         ret = -EINVAL;
2356                         goto err;
2357                 }
2358
2359                 if (user_wr->num_sge >=
2360                     (U32_MAX - ALIGN(sizeof *next, sizeof (struct ib_sge))) /
2361                     sizeof (struct ib_sge)) {
2362                         ret = -EINVAL;
2363                         goto err;
2364                 }
2365
2366                 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2367                                user_wr->num_sge * sizeof (struct ib_sge),
2368                                GFP_KERNEL);
2369                 if (!next) {
2370                         ret = -ENOMEM;
2371                         goto err;
2372                 }
2373
2374                 if (!last)
2375                         wr = next;
2376                 else
2377                         last->next = next;
2378                 last = next;
2379
2380                 next->next       = NULL;
2381                 next->wr_id      = user_wr->wr_id;
2382                 next->num_sge    = user_wr->num_sge;
2383
2384                 if (next->num_sge) {
2385                         next->sg_list = (void *) next +
2386                                 ALIGN(sizeof *next, sizeof (struct ib_sge));
2387                         if (copy_from_user(next->sg_list,
2388                                            buf + wr_count * wqe_size +
2389                                            sg_ind * sizeof (struct ib_sge),
2390                                            next->num_sge * sizeof (struct ib_sge))) {
2391                                 ret = -EFAULT;
2392                                 goto err;
2393                         }
2394                         sg_ind += next->num_sge;
2395                 } else
2396                         next->sg_list = NULL;
2397         }
2398
2399         kfree(user_wr);
2400         return wr;
2401
2402 err:
2403         kfree(user_wr);
2404
2405         while (wr) {
2406                 next = wr->next;
2407                 kfree(wr);
2408                 wr = next;
2409         }
2410
2411         return ERR_PTR(ret);
2412 }
2413
2414 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
2415                             struct ib_device *ib_dev,
2416                             const char __user *buf, int in_len,
2417                             int out_len)
2418 {
2419         struct ib_uverbs_post_recv      cmd;
2420         struct ib_uverbs_post_recv_resp resp;
2421         struct ib_recv_wr              *wr, *next, *bad_wr;
2422         struct ib_qp                   *qp;
2423         ssize_t                         ret = -EINVAL;
2424
2425         if (copy_from_user(&cmd, buf, sizeof cmd))
2426                 return -EFAULT;
2427
2428         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2429                                        in_len - sizeof cmd, cmd.wr_count,
2430                                        cmd.sge_count, cmd.wqe_size);
2431         if (IS_ERR(wr))
2432                 return PTR_ERR(wr);
2433
2434         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
2435         if (!qp)
2436                 goto out;
2437
2438         resp.bad_wr = 0;
2439         ret = qp->device->post_recv(qp->real_qp, wr, &bad_wr);
2440
2441         uobj_put_obj_read(qp);
2442         if (ret) {
2443                 for (next = wr; next; next = next->next) {
2444                         ++resp.bad_wr;
2445                         if (next == bad_wr)
2446                                 break;
2447                 }
2448         }
2449
2450         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
2451                 ret = -EFAULT;
2452
2453 out:
2454         while (wr) {
2455                 next = wr->next;
2456                 kfree(wr);
2457                 wr = next;
2458         }
2459
2460         return ret ? ret : in_len;
2461 }
2462
2463 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
2464                                 struct ib_device *ib_dev,
2465                                 const char __user *buf, int in_len,
2466                                 int out_len)
2467 {
2468         struct ib_uverbs_post_srq_recv      cmd;
2469         struct ib_uverbs_post_srq_recv_resp resp;
2470         struct ib_recv_wr                  *wr, *next, *bad_wr;
2471         struct ib_srq                      *srq;
2472         ssize_t                             ret = -EINVAL;
2473
2474         if (copy_from_user(&cmd, buf, sizeof cmd))
2475                 return -EFAULT;
2476
2477         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2478                                        in_len - sizeof cmd, cmd.wr_count,
2479                                        cmd.sge_count, cmd.wqe_size);
2480         if (IS_ERR(wr))
2481                 return PTR_ERR(wr);
2482
2483         srq = uobj_get_obj_read(srq, cmd.srq_handle, file->ucontext);
2484         if (!srq)
2485                 goto out;
2486
2487         resp.bad_wr = 0;
2488         ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
2489
2490         uobj_put_obj_read(srq);
2491
2492         if (ret)
2493                 for (next = wr; next; next = next->next) {
2494                         ++resp.bad_wr;
2495                         if (next == bad_wr)
2496                                 break;
2497                 }
2498
2499         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
2500                 ret = -EFAULT;
2501
2502 out:
2503         while (wr) {
2504                 next = wr->next;
2505                 kfree(wr);
2506                 wr = next;
2507         }
2508
2509         return ret ? ret : in_len;
2510 }
2511
2512 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
2513                             struct ib_device *ib_dev,
2514                             const char __user *buf, int in_len,
2515                             int out_len)
2516 {
2517         struct ib_uverbs_create_ah       cmd;
2518         struct ib_uverbs_create_ah_resp  resp;
2519         struct ib_uobject               *uobj;
2520         struct ib_pd                    *pd;
2521         struct ib_ah                    *ah;
2522         struct rdma_ah_attr             attr;
2523         int ret;
2524         struct ib_udata                   udata;
2525
2526         if (out_len < sizeof resp)
2527                 return -ENOSPC;
2528
2529         if (copy_from_user(&cmd, buf, sizeof cmd))
2530                 return -EFAULT;
2531
2532         if (!rdma_is_port_valid(ib_dev, cmd.attr.port_num))
2533                 return -EINVAL;
2534
2535         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
2536                    u64_to_user_ptr(cmd.response) + sizeof(resp),
2537                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
2538                    out_len - sizeof(resp));
2539
2540         uobj  = uobj_alloc(uobj_get_type(ah), file->ucontext);
2541         if (IS_ERR(uobj))
2542                 return PTR_ERR(uobj);
2543
2544         pd = uobj_get_obj_read(pd, cmd.pd_handle, file->ucontext);
2545         if (!pd) {
2546                 ret = -EINVAL;
2547                 goto err;
2548         }
2549
2550         attr.type = rdma_ah_find_type(ib_dev, cmd.attr.port_num);
2551         rdma_ah_set_make_grd(&attr, false);
2552         rdma_ah_set_dlid(&attr, cmd.attr.dlid);
2553         rdma_ah_set_sl(&attr, cmd.attr.sl);
2554         rdma_ah_set_path_bits(&attr, cmd.attr.src_path_bits);
2555         rdma_ah_set_static_rate(&attr, cmd.attr.static_rate);
2556         rdma_ah_set_port_num(&attr, cmd.attr.port_num);
2557
2558         if (cmd.attr.is_global) {
2559                 rdma_ah_set_grh(&attr, NULL, cmd.attr.grh.flow_label,
2560                                 cmd.attr.grh.sgid_index,
2561                                 cmd.attr.grh.hop_limit,
2562                                 cmd.attr.grh.traffic_class);
2563                 rdma_ah_set_dgid_raw(&attr, cmd.attr.grh.dgid);
2564         } else {
2565                 rdma_ah_set_ah_flags(&attr, 0);
2566         }
2567
2568         ah = rdma_create_user_ah(pd, &attr, &udata);
2569         if (IS_ERR(ah)) {
2570                 ret = PTR_ERR(ah);
2571                 goto err_put;
2572         }
2573
2574         ah->uobject  = uobj;
2575         uobj->user_handle = cmd.user_handle;
2576         uobj->object = ah;
2577
2578         resp.ah_handle = uobj->id;
2579
2580         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
2581                 ret = -EFAULT;
2582                 goto err_copy;
2583         }
2584
2585         uobj_put_obj_read(pd);
2586         uobj_alloc_commit(uobj);
2587
2588         return in_len;
2589
2590 err_copy:
2591         rdma_destroy_ah(ah);
2592
2593 err_put:
2594         uobj_put_obj_read(pd);
2595
2596 err:
2597         uobj_alloc_abort(uobj);
2598         return ret;
2599 }
2600
2601 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
2602                              struct ib_device *ib_dev,
2603                              const char __user *buf, int in_len, int out_len)
2604 {
2605         struct ib_uverbs_destroy_ah cmd;
2606         struct ib_uobject          *uobj;
2607         int                         ret;
2608
2609         if (copy_from_user(&cmd, buf, sizeof cmd))
2610                 return -EFAULT;
2611
2612         uobj  = uobj_get_write(uobj_get_type(ah), cmd.ah_handle,
2613                                file->ucontext);
2614         if (IS_ERR(uobj))
2615                 return PTR_ERR(uobj);
2616
2617         ret = uobj_remove_commit(uobj);
2618         return ret ?: in_len;
2619 }
2620
2621 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
2622                                struct ib_device *ib_dev,
2623                                const char __user *buf, int in_len,
2624                                int out_len)
2625 {
2626         struct ib_uverbs_attach_mcast cmd;
2627         struct ib_qp                 *qp;
2628         struct ib_uqp_object         *obj;
2629         struct ib_uverbs_mcast_entry *mcast;
2630         int                           ret;
2631
2632         if (copy_from_user(&cmd, buf, sizeof cmd))
2633                 return -EFAULT;
2634
2635         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
2636         if (!qp)
2637                 return -EINVAL;
2638
2639         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2640
2641         mutex_lock(&obj->mcast_lock);
2642         list_for_each_entry(mcast, &obj->mcast_list, list)
2643                 if (cmd.mlid == mcast->lid &&
2644                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2645                         ret = 0;
2646                         goto out_put;
2647                 }
2648
2649         mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
2650         if (!mcast) {
2651                 ret = -ENOMEM;
2652                 goto out_put;
2653         }
2654
2655         mcast->lid = cmd.mlid;
2656         memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
2657
2658         ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
2659         if (!ret)
2660                 list_add_tail(&mcast->list, &obj->mcast_list);
2661         else
2662                 kfree(mcast);
2663
2664 out_put:
2665         mutex_unlock(&obj->mcast_lock);
2666         uobj_put_obj_read(qp);
2667
2668         return ret ? ret : in_len;
2669 }
2670
2671 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
2672                                struct ib_device *ib_dev,
2673                                const char __user *buf, int in_len,
2674                                int out_len)
2675 {
2676         struct ib_uverbs_detach_mcast cmd;
2677         struct ib_uqp_object         *obj;
2678         struct ib_qp                 *qp;
2679         struct ib_uverbs_mcast_entry *mcast;
2680         int                           ret = -EINVAL;
2681         bool                          found = false;
2682
2683         if (copy_from_user(&cmd, buf, sizeof cmd))
2684                 return -EFAULT;
2685
2686         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
2687         if (!qp)
2688                 return -EINVAL;
2689
2690         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2691         mutex_lock(&obj->mcast_lock);
2692
2693         list_for_each_entry(mcast, &obj->mcast_list, list)
2694                 if (cmd.mlid == mcast->lid &&
2695                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2696                         list_del(&mcast->list);
2697                         kfree(mcast);
2698                         found = true;
2699                         break;
2700                 }
2701
2702         if (!found) {
2703                 ret = -EINVAL;
2704                 goto out_put;
2705         }
2706
2707         ret = ib_detach_mcast(qp, (union ib_gid *)cmd.gid, cmd.mlid);
2708
2709 out_put:
2710         mutex_unlock(&obj->mcast_lock);
2711         uobj_put_obj_read(qp);
2712         return ret ? ret : in_len;
2713 }
2714
2715 static int kern_spec_to_ib_spec_action(struct ib_uverbs_flow_spec *kern_spec,
2716                                        union ib_flow_spec *ib_spec)
2717 {
2718         ib_spec->type = kern_spec->type;
2719         switch (ib_spec->type) {
2720         case IB_FLOW_SPEC_ACTION_TAG:
2721                 if (kern_spec->flow_tag.size !=
2722                     sizeof(struct ib_uverbs_flow_spec_action_tag))
2723                         return -EINVAL;
2724
2725                 ib_spec->flow_tag.size = sizeof(struct ib_flow_spec_action_tag);
2726                 ib_spec->flow_tag.tag_id = kern_spec->flow_tag.tag_id;
2727                 break;
2728         case IB_FLOW_SPEC_ACTION_DROP:
2729                 if (kern_spec->drop.size !=
2730                     sizeof(struct ib_uverbs_flow_spec_action_drop))
2731                         return -EINVAL;
2732
2733                 ib_spec->drop.size = sizeof(struct ib_flow_spec_action_drop);
2734                 break;
2735         default:
2736                 return -EINVAL;
2737         }
2738         return 0;
2739 }
2740
2741 static size_t kern_spec_filter_sz(struct ib_uverbs_flow_spec_hdr *spec)
2742 {
2743         /* Returns user space filter size, includes padding */
2744         return (spec->size - sizeof(struct ib_uverbs_flow_spec_hdr)) / 2;
2745 }
2746
2747 static ssize_t spec_filter_size(void *kern_spec_filter, u16 kern_filter_size,
2748                                 u16 ib_real_filter_sz)
2749 {
2750         /*
2751          * User space filter structures must be 64 bit aligned, otherwise this
2752          * may pass, but we won't handle additional new attributes.
2753          */
2754
2755         if (kern_filter_size > ib_real_filter_sz) {
2756                 if (memchr_inv(kern_spec_filter +
2757                                ib_real_filter_sz, 0,
2758                                kern_filter_size - ib_real_filter_sz))
2759                         return -EINVAL;
2760                 return ib_real_filter_sz;
2761         }
2762         return kern_filter_size;
2763 }
2764
2765 static int kern_spec_to_ib_spec_filter(struct ib_uverbs_flow_spec *kern_spec,
2766                                        union ib_flow_spec *ib_spec)
2767 {
2768         ssize_t actual_filter_sz;
2769         ssize_t kern_filter_sz;
2770         ssize_t ib_filter_sz;
2771         void *kern_spec_mask;
2772         void *kern_spec_val;
2773
2774         if (kern_spec->reserved)
2775                 return -EINVAL;
2776
2777         ib_spec->type = kern_spec->type;
2778
2779         kern_filter_sz = kern_spec_filter_sz(&kern_spec->hdr);
2780         /* User flow spec size must be aligned to 4 bytes */
2781         if (kern_filter_sz != ALIGN(kern_filter_sz, 4))
2782                 return -EINVAL;
2783
2784         kern_spec_val = (void *)kern_spec +
2785                 sizeof(struct ib_uverbs_flow_spec_hdr);
2786         kern_spec_mask = kern_spec_val + kern_filter_sz;
2787         if (ib_spec->type == (IB_FLOW_SPEC_INNER | IB_FLOW_SPEC_VXLAN_TUNNEL))
2788                 return -EINVAL;
2789
2790         switch (ib_spec->type & ~IB_FLOW_SPEC_INNER) {
2791         case IB_FLOW_SPEC_ETH:
2792                 ib_filter_sz = offsetof(struct ib_flow_eth_filter, real_sz);
2793                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2794                                                     kern_filter_sz,
2795                                                     ib_filter_sz);
2796                 if (actual_filter_sz <= 0)
2797                         return -EINVAL;
2798                 ib_spec->size = sizeof(struct ib_flow_spec_eth);
2799                 memcpy(&ib_spec->eth.val, kern_spec_val, actual_filter_sz);
2800                 memcpy(&ib_spec->eth.mask, kern_spec_mask, actual_filter_sz);
2801                 break;
2802         case IB_FLOW_SPEC_IPV4:
2803                 ib_filter_sz = offsetof(struct ib_flow_ipv4_filter, real_sz);
2804                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2805                                                     kern_filter_sz,
2806                                                     ib_filter_sz);
2807                 if (actual_filter_sz <= 0)
2808                         return -EINVAL;
2809                 ib_spec->size = sizeof(struct ib_flow_spec_ipv4);
2810                 memcpy(&ib_spec->ipv4.val, kern_spec_val, actual_filter_sz);
2811                 memcpy(&ib_spec->ipv4.mask, kern_spec_mask, actual_filter_sz);
2812                 break;
2813         case IB_FLOW_SPEC_IPV6:
2814                 ib_filter_sz = offsetof(struct ib_flow_ipv6_filter, real_sz);
2815                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2816                                                     kern_filter_sz,
2817                                                     ib_filter_sz);
2818                 if (actual_filter_sz <= 0)
2819                         return -EINVAL;
2820                 ib_spec->size = sizeof(struct ib_flow_spec_ipv6);
2821                 memcpy(&ib_spec->ipv6.val, kern_spec_val, actual_filter_sz);
2822                 memcpy(&ib_spec->ipv6.mask, kern_spec_mask, actual_filter_sz);
2823
2824                 if ((ntohl(ib_spec->ipv6.mask.flow_label)) >= BIT(20) ||
2825                     (ntohl(ib_spec->ipv6.val.flow_label)) >= BIT(20))
2826                         return -EINVAL;
2827                 break;
2828         case IB_FLOW_SPEC_TCP:
2829         case IB_FLOW_SPEC_UDP:
2830                 ib_filter_sz = offsetof(struct ib_flow_tcp_udp_filter, real_sz);
2831                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2832                                                     kern_filter_sz,
2833                                                     ib_filter_sz);
2834                 if (actual_filter_sz <= 0)
2835                         return -EINVAL;
2836                 ib_spec->size = sizeof(struct ib_flow_spec_tcp_udp);
2837                 memcpy(&ib_spec->tcp_udp.val, kern_spec_val, actual_filter_sz);
2838                 memcpy(&ib_spec->tcp_udp.mask, kern_spec_mask, actual_filter_sz);
2839                 break;
2840         case IB_FLOW_SPEC_VXLAN_TUNNEL:
2841                 ib_filter_sz = offsetof(struct ib_flow_tunnel_filter, real_sz);
2842                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2843                                                     kern_filter_sz,
2844                                                     ib_filter_sz);
2845                 if (actual_filter_sz <= 0)
2846                         return -EINVAL;
2847                 ib_spec->tunnel.size = sizeof(struct ib_flow_spec_tunnel);
2848                 memcpy(&ib_spec->tunnel.val, kern_spec_val, actual_filter_sz);
2849                 memcpy(&ib_spec->tunnel.mask, kern_spec_mask, actual_filter_sz);
2850
2851                 if ((ntohl(ib_spec->tunnel.mask.tunnel_id)) >= BIT(24) ||
2852                     (ntohl(ib_spec->tunnel.val.tunnel_id)) >= BIT(24))
2853                         return -EINVAL;
2854                 break;
2855         default:
2856                 return -EINVAL;
2857         }
2858         return 0;
2859 }
2860
2861 static int kern_spec_to_ib_spec(struct ib_uverbs_flow_spec *kern_spec,
2862                                 union ib_flow_spec *ib_spec)
2863 {
2864         if (kern_spec->reserved)
2865                 return -EINVAL;
2866
2867         if (kern_spec->type >= IB_FLOW_SPEC_ACTION_TAG)
2868                 return kern_spec_to_ib_spec_action(kern_spec, ib_spec);
2869         else
2870                 return kern_spec_to_ib_spec_filter(kern_spec, ib_spec);
2871 }
2872
2873 int ib_uverbs_ex_create_wq(struct ib_uverbs_file *file,
2874                            struct ib_device *ib_dev,
2875                            struct ib_udata *ucore,
2876                            struct ib_udata *uhw)
2877 {
2878         struct ib_uverbs_ex_create_wq     cmd = {};
2879         struct ib_uverbs_ex_create_wq_resp resp = {};
2880         struct ib_uwq_object           *obj;
2881         int err = 0;
2882         struct ib_cq *cq;
2883         struct ib_pd *pd;
2884         struct ib_wq *wq;
2885         struct ib_wq_init_attr wq_init_attr = {};
2886         size_t required_cmd_sz;
2887         size_t required_resp_len;
2888
2889         required_cmd_sz = offsetof(typeof(cmd), max_sge) + sizeof(cmd.max_sge);
2890         required_resp_len = offsetof(typeof(resp), wqn) + sizeof(resp.wqn);
2891
2892         if (ucore->inlen < required_cmd_sz)
2893                 return -EINVAL;
2894
2895         if (ucore->outlen < required_resp_len)
2896                 return -ENOSPC;
2897
2898         if (ucore->inlen > sizeof(cmd) &&
2899             !ib_is_udata_cleared(ucore, sizeof(cmd),
2900                                  ucore->inlen - sizeof(cmd)))
2901                 return -EOPNOTSUPP;
2902
2903         err = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
2904         if (err)
2905                 return err;
2906
2907         if (cmd.comp_mask)
2908                 return -EOPNOTSUPP;
2909
2910         obj  = (struct ib_uwq_object *)uobj_alloc(uobj_get_type(wq),
2911                                                   file->ucontext);
2912         if (IS_ERR(obj))
2913                 return PTR_ERR(obj);
2914
2915         pd  = uobj_get_obj_read(pd, cmd.pd_handle, file->ucontext);
2916         if (!pd) {
2917                 err = -EINVAL;
2918                 goto err_uobj;
2919         }
2920
2921         cq = uobj_get_obj_read(cq, cmd.cq_handle, file->ucontext);
2922         if (!cq) {
2923                 err = -EINVAL;
2924                 goto err_put_pd;
2925         }
2926
2927         wq_init_attr.cq = cq;
2928         wq_init_attr.max_sge = cmd.max_sge;
2929         wq_init_attr.max_wr = cmd.max_wr;
2930         wq_init_attr.wq_context = file;
2931         wq_init_attr.wq_type = cmd.wq_type;
2932         wq_init_attr.event_handler = ib_uverbs_wq_event_handler;
2933         if (ucore->inlen >= (offsetof(typeof(cmd), create_flags) +
2934                              sizeof(cmd.create_flags)))
2935                 wq_init_attr.create_flags = cmd.create_flags;
2936         obj->uevent.events_reported = 0;
2937         INIT_LIST_HEAD(&obj->uevent.event_list);
2938         wq = pd->device->create_wq(pd, &wq_init_attr, uhw);
2939         if (IS_ERR(wq)) {
2940                 err = PTR_ERR(wq);
2941                 goto err_put_cq;
2942         }
2943
2944         wq->uobject = &obj->uevent.uobject;
2945         obj->uevent.uobject.object = wq;
2946         wq->wq_type = wq_init_attr.wq_type;
2947         wq->cq = cq;
2948         wq->pd = pd;
2949         wq->device = pd->device;
2950         wq->wq_context = wq_init_attr.wq_context;
2951         atomic_set(&wq->usecnt, 0);
2952         atomic_inc(&pd->usecnt);
2953         atomic_inc(&cq->usecnt);
2954         wq->uobject = &obj->uevent.uobject;
2955         obj->uevent.uobject.object = wq;
2956
2957         memset(&resp, 0, sizeof(resp));
2958         resp.wq_handle = obj->uevent.uobject.id;
2959         resp.max_sge = wq_init_attr.max_sge;
2960         resp.max_wr = wq_init_attr.max_wr;
2961         resp.wqn = wq->wq_num;
2962         resp.response_length = required_resp_len;
2963         err = ib_copy_to_udata(ucore,
2964                                &resp, resp.response_length);
2965         if (err)
2966                 goto err_copy;
2967
2968         uobj_put_obj_read(pd);
2969         uobj_put_obj_read(cq);
2970         uobj_alloc_commit(&obj->uevent.uobject);
2971         return 0;
2972
2973 err_copy:
2974         ib_destroy_wq(wq);
2975 err_put_cq:
2976         uobj_put_obj_read(cq);
2977 err_put_pd:
2978         uobj_put_obj_read(pd);
2979 err_uobj:
2980         uobj_alloc_abort(&obj->uevent.uobject);
2981
2982         return err;
2983 }
2984
2985 int ib_uverbs_ex_destroy_wq(struct ib_uverbs_file *file,
2986                             struct ib_device *ib_dev,
2987                             struct ib_udata *ucore,
2988                             struct ib_udata *uhw)
2989 {
2990         struct ib_uverbs_ex_destroy_wq  cmd = {};
2991         struct ib_uverbs_ex_destroy_wq_resp     resp = {};
2992         struct ib_uobject               *uobj;
2993         struct ib_uwq_object            *obj;
2994         size_t required_cmd_sz;
2995         size_t required_resp_len;
2996         int                             ret;
2997
2998         required_cmd_sz = offsetof(typeof(cmd), wq_handle) + sizeof(cmd.wq_handle);
2999         required_resp_len = offsetof(typeof(resp), reserved) + sizeof(resp.reserved);
3000
3001         if (ucore->inlen < required_cmd_sz)
3002                 return -EINVAL;
3003
3004         if (ucore->outlen < required_resp_len)
3005                 return -ENOSPC;
3006
3007         if (ucore->inlen > sizeof(cmd) &&
3008             !ib_is_udata_cleared(ucore, sizeof(cmd),
3009                                  ucore->inlen - sizeof(cmd)))
3010                 return -EOPNOTSUPP;
3011
3012         ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
3013         if (ret)
3014                 return ret;
3015
3016         if (cmd.comp_mask)
3017                 return -EOPNOTSUPP;
3018
3019         resp.response_length = required_resp_len;
3020         uobj  = uobj_get_write(uobj_get_type(wq), cmd.wq_handle,
3021                                file->ucontext);
3022         if (IS_ERR(uobj))
3023                 return PTR_ERR(uobj);
3024
3025         obj = container_of(uobj, struct ib_uwq_object, uevent.uobject);
3026         /*
3027          * Make sure we don't free the memory in remove_commit as we still
3028          * needs the uobject memory to create the response.
3029          */
3030         uverbs_uobject_get(uobj);
3031
3032         ret = uobj_remove_commit(uobj);
3033         resp.events_reported = obj->uevent.events_reported;
3034         uverbs_uobject_put(uobj);
3035         if (ret)
3036                 return ret;
3037
3038         return ib_copy_to_udata(ucore, &resp, resp.response_length);
3039 }
3040
3041 int ib_uverbs_ex_modify_wq(struct ib_uverbs_file *file,
3042                            struct ib_device *ib_dev,
3043                            struct ib_udata *ucore,
3044                            struct ib_udata *uhw)
3045 {
3046         struct ib_uverbs_ex_modify_wq cmd = {};
3047         struct ib_wq *wq;
3048         struct ib_wq_attr wq_attr = {};
3049         size_t required_cmd_sz;
3050         int ret;
3051
3052         required_cmd_sz = offsetof(typeof(cmd), curr_wq_state) + sizeof(cmd.curr_wq_state);
3053         if (ucore->inlen < required_cmd_sz)
3054                 return -EINVAL;
3055
3056         if (ucore->inlen > sizeof(cmd) &&
3057             !ib_is_udata_cleared(ucore, sizeof(cmd),
3058                                  ucore->inlen - sizeof(cmd)))
3059                 return -EOPNOTSUPP;
3060
3061         ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
3062         if (ret)
3063                 return ret;
3064
3065         if (!cmd.attr_mask)
3066                 return -EINVAL;
3067
3068         if (cmd.attr_mask > (IB_WQ_STATE | IB_WQ_CUR_STATE | IB_WQ_FLAGS))
3069                 return -EINVAL;
3070
3071         wq = uobj_get_obj_read(wq, cmd.wq_handle, file->ucontext);
3072         if (!wq)
3073                 return -EINVAL;
3074
3075         wq_attr.curr_wq_state = cmd.curr_wq_state;
3076         wq_attr.wq_state = cmd.wq_state;
3077         if (cmd.attr_mask & IB_WQ_FLAGS) {
3078                 wq_attr.flags = cmd.flags;
3079                 wq_attr.flags_mask = cmd.flags_mask;
3080         }
3081         ret = wq->device->modify_wq(wq, &wq_attr, cmd.attr_mask, uhw);
3082         uobj_put_obj_read(wq);
3083         return ret;
3084 }
3085
3086 int ib_uverbs_ex_create_rwq_ind_table(struct ib_uverbs_file *file,
3087                                       struct ib_device *ib_dev,
3088                                       struct ib_udata *ucore,
3089                                       struct ib_udata *uhw)
3090 {
3091         struct ib_uverbs_ex_create_rwq_ind_table          cmd = {};
3092         struct ib_uverbs_ex_create_rwq_ind_table_resp  resp = {};
3093         struct ib_uobject                 *uobj;
3094         int err = 0;
3095         struct ib_rwq_ind_table_init_attr init_attr = {};
3096         struct ib_rwq_ind_table *rwq_ind_tbl;
3097         struct ib_wq    **wqs = NULL;
3098         u32 *wqs_handles = NULL;
3099         struct ib_wq    *wq = NULL;
3100         int i, j, num_read_wqs;
3101         u32 num_wq_handles;
3102         u32 expected_in_size;
3103         size_t required_cmd_sz_header;
3104         size_t required_resp_len;
3105
3106         required_cmd_sz_header = offsetof(typeof(cmd), log_ind_tbl_size) + sizeof(cmd.log_ind_tbl_size);
3107         required_resp_len = offsetof(typeof(resp), ind_tbl_num) + sizeof(resp.ind_tbl_num);
3108
3109         if (ucore->inlen < required_cmd_sz_header)
3110                 return -EINVAL;
3111
3112         if (ucore->outlen < required_resp_len)
3113                 return -ENOSPC;
3114
3115         err = ib_copy_from_udata(&cmd, ucore, required_cmd_sz_header);
3116         if (err)
3117                 return err;
3118
3119         ucore->inbuf += required_cmd_sz_header;
3120         ucore->inlen -= required_cmd_sz_header;
3121
3122         if (cmd.comp_mask)
3123                 return -EOPNOTSUPP;
3124
3125         if (cmd.log_ind_tbl_size > IB_USER_VERBS_MAX_LOG_IND_TBL_SIZE)
3126                 return -EINVAL;
3127
3128         num_wq_handles = 1 << cmd.log_ind_tbl_size;
3129         expected_in_size = num_wq_handles * sizeof(__u32);
3130         if (num_wq_handles == 1)
3131                 /* input size for wq handles is u64 aligned */
3132                 expected_in_size += sizeof(__u32);
3133
3134         if (ucore->inlen < expected_in_size)
3135                 return -EINVAL;
3136
3137         if (ucore->inlen > expected_in_size &&
3138             !ib_is_udata_cleared(ucore, expected_in_size,
3139                                  ucore->inlen - expected_in_size))
3140                 return -EOPNOTSUPP;
3141
3142         wqs_handles = kcalloc(num_wq_handles, sizeof(*wqs_handles),
3143                               GFP_KERNEL);
3144         if (!wqs_handles)
3145                 return -ENOMEM;
3146
3147         err = ib_copy_from_udata(wqs_handles, ucore,
3148                                  num_wq_handles * sizeof(__u32));
3149         if (err)
3150                 goto err_free;
3151
3152         wqs = kcalloc(num_wq_handles, sizeof(*wqs), GFP_KERNEL);
3153         if (!wqs) {
3154                 err = -ENOMEM;
3155                 goto  err_free;
3156         }
3157
3158         for (num_read_wqs = 0; num_read_wqs < num_wq_handles;
3159                         num_read_wqs++) {
3160                 wq = uobj_get_obj_read(wq, wqs_handles[num_read_wqs],
3161                                        file->ucontext);
3162                 if (!wq) {
3163                         err = -EINVAL;
3164                         goto put_wqs;
3165                 }
3166
3167                 wqs[num_read_wqs] = wq;
3168         }
3169
3170         uobj  = uobj_alloc(uobj_get_type(rwq_ind_table), file->ucontext);
3171         if (IS_ERR(uobj)) {
3172                 err = PTR_ERR(uobj);
3173                 goto put_wqs;
3174         }
3175
3176         init_attr.log_ind_tbl_size = cmd.log_ind_tbl_size;
3177         init_attr.ind_tbl = wqs;
3178         rwq_ind_tbl = ib_dev->create_rwq_ind_table(ib_dev, &init_attr, uhw);
3179
3180         if (IS_ERR(rwq_ind_tbl)) {
3181                 err = PTR_ERR(rwq_ind_tbl);
3182                 goto err_uobj;
3183         }
3184
3185         rwq_ind_tbl->ind_tbl = wqs;
3186         rwq_ind_tbl->log_ind_tbl_size = init_attr.log_ind_tbl_size;
3187         rwq_ind_tbl->uobject = uobj;
3188         uobj->object = rwq_ind_tbl;
3189         rwq_ind_tbl->device = ib_dev;
3190         atomic_set(&rwq_ind_tbl->usecnt, 0);
3191
3192         for (i = 0; i < num_wq_handles; i++)
3193                 atomic_inc(&wqs[i]->usecnt);
3194
3195         resp.ind_tbl_handle = uobj->id;
3196         resp.ind_tbl_num = rwq_ind_tbl->ind_tbl_num;
3197         resp.response_length = required_resp_len;
3198
3199         err = ib_copy_to_udata(ucore,
3200                                &resp, resp.response_length);
3201         if (err)
3202                 goto err_copy;
3203
3204         kfree(wqs_handles);
3205
3206         for (j = 0; j < num_read_wqs; j++)
3207                 uobj_put_obj_read(wqs[j]);
3208
3209         uobj_alloc_commit(uobj);
3210         return 0;
3211
3212 err_copy:
3213         ib_destroy_rwq_ind_table(rwq_ind_tbl);
3214 err_uobj:
3215         uobj_alloc_abort(uobj);
3216 put_wqs:
3217         for (j = 0; j < num_read_wqs; j++)
3218                 uobj_put_obj_read(wqs[j]);
3219 err_free:
3220         kfree(wqs_handles);
3221         kfree(wqs);
3222         return err;
3223 }
3224
3225 int ib_uverbs_ex_destroy_rwq_ind_table(struct ib_uverbs_file *file,
3226                                        struct ib_device *ib_dev,
3227                                        struct ib_udata *ucore,
3228                                        struct ib_udata *uhw)
3229 {
3230         struct ib_uverbs_ex_destroy_rwq_ind_table       cmd = {};
3231         struct ib_uobject               *uobj;
3232         int                     ret;
3233         size_t required_cmd_sz;
3234
3235         required_cmd_sz = offsetof(typeof(cmd), ind_tbl_handle) + sizeof(cmd.ind_tbl_handle);
3236
3237         if (ucore->inlen < required_cmd_sz)
3238                 return -EINVAL;
3239
3240         if (ucore->inlen > sizeof(cmd) &&
3241             !ib_is_udata_cleared(ucore, sizeof(cmd),
3242                                  ucore->inlen - sizeof(cmd)))
3243                 return -EOPNOTSUPP;
3244
3245         ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
3246         if (ret)
3247                 return ret;
3248
3249         if (cmd.comp_mask)
3250                 return -EOPNOTSUPP;
3251
3252         uobj  = uobj_get_write(uobj_get_type(rwq_ind_table), cmd.ind_tbl_handle,
3253                                file->ucontext);
3254         if (IS_ERR(uobj))
3255                 return PTR_ERR(uobj);
3256
3257         return uobj_remove_commit(uobj);
3258 }
3259
3260 int ib_uverbs_ex_create_flow(struct ib_uverbs_file *file,
3261                              struct ib_device *ib_dev,
3262                              struct ib_udata *ucore,
3263                              struct ib_udata *uhw)
3264 {
3265         struct ib_uverbs_create_flow      cmd;
3266         struct ib_uverbs_create_flow_resp resp;
3267         struct ib_uobject                 *uobj;
3268         struct ib_flow                    *flow_id;
3269         struct ib_uverbs_flow_attr        *kern_flow_attr;
3270         struct ib_flow_attr               *flow_attr;
3271         struct ib_qp                      *qp;
3272         int err = 0;
3273         void *kern_spec;
3274         void *ib_spec;
3275         int i;
3276
3277         if (ucore->inlen < sizeof(cmd))
3278                 return -EINVAL;
3279
3280         if (ucore->outlen < sizeof(resp))
3281                 return -ENOSPC;
3282
3283         err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3284         if (err)
3285                 return err;
3286
3287         ucore->inbuf += sizeof(cmd);
3288         ucore->inlen -= sizeof(cmd);
3289
3290         if (cmd.comp_mask)
3291                 return -EINVAL;
3292
3293         if (!capable(CAP_NET_RAW))
3294                 return -EPERM;
3295
3296         if (cmd.flow_attr.flags >= IB_FLOW_ATTR_FLAGS_RESERVED)
3297                 return -EINVAL;
3298
3299         if ((cmd.flow_attr.flags & IB_FLOW_ATTR_FLAGS_DONT_TRAP) &&
3300             ((cmd.flow_attr.type == IB_FLOW_ATTR_ALL_DEFAULT) ||
3301              (cmd.flow_attr.type == IB_FLOW_ATTR_MC_DEFAULT)))
3302                 return -EINVAL;
3303
3304         if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS)
3305                 return -EINVAL;
3306
3307         if (cmd.flow_attr.size > ucore->inlen ||
3308             cmd.flow_attr.size >
3309             (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec)))
3310                 return -EINVAL;
3311
3312         if (cmd.flow_attr.reserved[0] ||
3313             cmd.flow_attr.reserved[1])
3314                 return -EINVAL;
3315
3316         if (cmd.flow_attr.num_of_specs) {
3317                 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size,
3318                                          GFP_KERNEL);
3319                 if (!kern_flow_attr)
3320                         return -ENOMEM;
3321
3322                 memcpy(kern_flow_attr, &cmd.flow_attr, sizeof(*kern_flow_attr));
3323                 err = ib_copy_from_udata(kern_flow_attr + 1, ucore,
3324                                          cmd.flow_attr.size);
3325                 if (err)
3326                         goto err_free_attr;
3327         } else {
3328                 kern_flow_attr = &cmd.flow_attr;
3329         }
3330
3331         uobj  = uobj_alloc(uobj_get_type(flow), file->ucontext);
3332         if (IS_ERR(uobj)) {
3333                 err = PTR_ERR(uobj);
3334                 goto err_free_attr;
3335         }
3336
3337         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
3338         if (!qp) {
3339                 err = -EINVAL;
3340                 goto err_uobj;
3341         }
3342
3343         flow_attr = kzalloc(sizeof(*flow_attr) + cmd.flow_attr.num_of_specs *
3344                             sizeof(union ib_flow_spec), GFP_KERNEL);
3345         if (!flow_attr) {
3346                 err = -ENOMEM;
3347                 goto err_put;
3348         }
3349
3350         flow_attr->type = kern_flow_attr->type;
3351         flow_attr->priority = kern_flow_attr->priority;
3352         flow_attr->num_of_specs = kern_flow_attr->num_of_specs;
3353         flow_attr->port = kern_flow_attr->port;
3354         flow_attr->flags = kern_flow_attr->flags;
3355         flow_attr->size = sizeof(*flow_attr);
3356
3357         kern_spec = kern_flow_attr + 1;
3358         ib_spec = flow_attr + 1;
3359         for (i = 0; i < flow_attr->num_of_specs &&
3360              cmd.flow_attr.size > offsetof(struct ib_uverbs_flow_spec, reserved) &&
3361              cmd.flow_attr.size >=
3362              ((struct ib_uverbs_flow_spec *)kern_spec)->size; i++) {
3363                 err = kern_spec_to_ib_spec(kern_spec, ib_spec);
3364                 if (err)
3365                         goto err_free;
3366                 flow_attr->size +=
3367                         ((union ib_flow_spec *) ib_spec)->size;
3368                 cmd.flow_attr.size -= ((struct ib_uverbs_flow_spec *)kern_spec)->size;
3369                 kern_spec += ((struct ib_uverbs_flow_spec *) kern_spec)->size;
3370                 ib_spec += ((union ib_flow_spec *) ib_spec)->size;
3371         }
3372         if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) {
3373                 pr_warn("create flow failed, flow %d: %d bytes left from uverb cmd\n",
3374                         i, cmd.flow_attr.size);
3375                 err = -EINVAL;
3376                 goto err_free;
3377         }
3378         flow_id = ib_create_flow(qp, flow_attr, IB_FLOW_DOMAIN_USER);
3379         if (IS_ERR(flow_id)) {
3380                 err = PTR_ERR(flow_id);
3381                 goto err_free;
3382         }
3383         flow_id->uobject = uobj;
3384         uobj->object = flow_id;
3385
3386         memset(&resp, 0, sizeof(resp));
3387         resp.flow_handle = uobj->id;
3388
3389         err = ib_copy_to_udata(ucore,
3390                                &resp, sizeof(resp));
3391         if (err)
3392                 goto err_copy;
3393
3394         uobj_put_obj_read(qp);
3395         uobj_alloc_commit(uobj);
3396         kfree(flow_attr);
3397         if (cmd.flow_attr.num_of_specs)
3398                 kfree(kern_flow_attr);
3399         return 0;
3400 err_copy:
3401         ib_destroy_flow(flow_id);
3402 err_free:
3403         kfree(flow_attr);
3404 err_put:
3405         uobj_put_obj_read(qp);
3406 err_uobj:
3407         uobj_alloc_abort(uobj);
3408 err_free_attr:
3409         if (cmd.flow_attr.num_of_specs)
3410                 kfree(kern_flow_attr);
3411         return err;
3412 }
3413
3414 int ib_uverbs_ex_destroy_flow(struct ib_uverbs_file *file,
3415                               struct ib_device *ib_dev,
3416                               struct ib_udata *ucore,
3417                               struct ib_udata *uhw)
3418 {
3419         struct ib_uverbs_destroy_flow   cmd;
3420         struct ib_uobject               *uobj;
3421         int                             ret;
3422
3423         if (ucore->inlen < sizeof(cmd))
3424                 return -EINVAL;
3425
3426         ret = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3427         if (ret)
3428                 return ret;
3429
3430         if (cmd.comp_mask)
3431                 return -EINVAL;
3432
3433         uobj  = uobj_get_write(uobj_get_type(flow), cmd.flow_handle,
3434                                file->ucontext);
3435         if (IS_ERR(uobj))
3436                 return PTR_ERR(uobj);
3437
3438         ret = uobj_remove_commit(uobj);
3439         return ret;
3440 }
3441
3442 static int __uverbs_create_xsrq(struct ib_uverbs_file *file,
3443                                 struct ib_device *ib_dev,
3444                                 struct ib_uverbs_create_xsrq *cmd,
3445                                 struct ib_udata *udata)
3446 {
3447         struct ib_uverbs_create_srq_resp resp;
3448         struct ib_usrq_object           *obj;
3449         struct ib_pd                    *pd;
3450         struct ib_srq                   *srq;
3451         struct ib_uobject               *uninitialized_var(xrcd_uobj);
3452         struct ib_srq_init_attr          attr;
3453         int ret;
3454
3455         obj  = (struct ib_usrq_object *)uobj_alloc(uobj_get_type(srq),
3456                                                    file->ucontext);
3457         if (IS_ERR(obj))
3458                 return PTR_ERR(obj);
3459
3460         if (cmd->srq_type == IB_SRQT_TM)
3461                 attr.ext.tag_matching.max_num_tags = cmd->max_num_tags;
3462
3463         if (cmd->srq_type == IB_SRQT_XRC) {
3464                 xrcd_uobj = uobj_get_read(uobj_get_type(xrcd), cmd->xrcd_handle,
3465                                           file->ucontext);
3466                 if (IS_ERR(xrcd_uobj)) {
3467                         ret = -EINVAL;
3468                         goto err;
3469                 }
3470
3471                 attr.ext.xrc.xrcd = (struct ib_xrcd *)xrcd_uobj->object;
3472                 if (!attr.ext.xrc.xrcd) {
3473                         ret = -EINVAL;
3474                         goto err_put_xrcd;
3475                 }
3476
3477                 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
3478                 atomic_inc(&obj->uxrcd->refcnt);
3479         }
3480
3481         if (ib_srq_has_cq(cmd->srq_type)) {
3482                 attr.ext.cq  = uobj_get_obj_read(cq, cmd->cq_handle,
3483                                                  file->ucontext);
3484                 if (!attr.ext.cq) {
3485                         ret = -EINVAL;
3486                         goto err_put_xrcd;
3487                 }
3488         }
3489
3490         pd  = uobj_get_obj_read(pd, cmd->pd_handle, file->ucontext);
3491         if (!pd) {
3492                 ret = -EINVAL;
3493                 goto err_put_cq;
3494         }
3495
3496         attr.event_handler  = ib_uverbs_srq_event_handler;
3497         attr.srq_context    = file;
3498         attr.srq_type       = cmd->srq_type;
3499         attr.attr.max_wr    = cmd->max_wr;
3500         attr.attr.max_sge   = cmd->max_sge;
3501         attr.attr.srq_limit = cmd->srq_limit;
3502
3503         obj->uevent.events_reported = 0;
3504         INIT_LIST_HEAD(&obj->uevent.event_list);
3505
3506         srq = pd->device->create_srq(pd, &attr, udata);
3507         if (IS_ERR(srq)) {
3508                 ret = PTR_ERR(srq);
3509                 goto err_put;
3510         }
3511
3512         srq->device        = pd->device;
3513         srq->pd            = pd;
3514         srq->srq_type      = cmd->srq_type;
3515         srq->uobject       = &obj->uevent.uobject;
3516         srq->event_handler = attr.event_handler;
3517         srq->srq_context   = attr.srq_context;
3518
3519         if (ib_srq_has_cq(cmd->srq_type)) {
3520                 srq->ext.cq       = attr.ext.cq;
3521                 atomic_inc(&attr.ext.cq->usecnt);
3522         }
3523
3524         if (cmd->srq_type == IB_SRQT_XRC) {
3525                 srq->ext.xrc.xrcd = attr.ext.xrc.xrcd;
3526                 atomic_inc(&attr.ext.xrc.xrcd->usecnt);
3527         }
3528
3529         atomic_inc(&pd->usecnt);
3530         atomic_set(&srq->usecnt, 0);
3531
3532         obj->uevent.uobject.object = srq;
3533         obj->uevent.uobject.user_handle = cmd->user_handle;
3534
3535         memset(&resp, 0, sizeof resp);
3536         resp.srq_handle = obj->uevent.uobject.id;
3537         resp.max_wr     = attr.attr.max_wr;
3538         resp.max_sge    = attr.attr.max_sge;
3539         if (cmd->srq_type == IB_SRQT_XRC)
3540                 resp.srqn = srq->ext.xrc.srq_num;
3541
3542         if (copy_to_user((void __user *) (unsigned long) cmd->response,
3543                          &resp, sizeof resp)) {
3544                 ret = -EFAULT;
3545                 goto err_copy;
3546         }
3547
3548         if (cmd->srq_type == IB_SRQT_XRC)
3549                 uobj_put_read(xrcd_uobj);
3550
3551         if (ib_srq_has_cq(cmd->srq_type))
3552                 uobj_put_obj_read(attr.ext.cq);
3553
3554         uobj_put_obj_read(pd);
3555         uobj_alloc_commit(&obj->uevent.uobject);
3556
3557         return 0;
3558
3559 err_copy:
3560         ib_destroy_srq(srq);
3561
3562 err_put:
3563         uobj_put_obj_read(pd);
3564
3565 err_put_cq:
3566         if (ib_srq_has_cq(cmd->srq_type))
3567                 uobj_put_obj_read(attr.ext.cq);
3568
3569 err_put_xrcd:
3570         if (cmd->srq_type == IB_SRQT_XRC) {
3571                 atomic_dec(&obj->uxrcd->refcnt);
3572                 uobj_put_read(xrcd_uobj);
3573         }
3574
3575 err:
3576         uobj_alloc_abort(&obj->uevent.uobject);
3577         return ret;
3578 }
3579
3580 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
3581                              struct ib_device *ib_dev,
3582                              const char __user *buf, int in_len,
3583                              int out_len)
3584 {
3585         struct ib_uverbs_create_srq      cmd;
3586         struct ib_uverbs_create_xsrq     xcmd;
3587         struct ib_uverbs_create_srq_resp resp;
3588         struct ib_udata                  udata;
3589         int ret;
3590
3591         if (out_len < sizeof resp)
3592                 return -ENOSPC;
3593
3594         if (copy_from_user(&cmd, buf, sizeof cmd))
3595                 return -EFAULT;
3596
3597         memset(&xcmd, 0, sizeof(xcmd));
3598         xcmd.response    = cmd.response;
3599         xcmd.user_handle = cmd.user_handle;
3600         xcmd.srq_type    = IB_SRQT_BASIC;
3601         xcmd.pd_handle   = cmd.pd_handle;
3602         xcmd.max_wr      = cmd.max_wr;
3603         xcmd.max_sge     = cmd.max_sge;
3604         xcmd.srq_limit   = cmd.srq_limit;
3605
3606         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
3607                    u64_to_user_ptr(cmd.response) + sizeof(resp),
3608                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
3609                    out_len - sizeof(resp));
3610
3611         ret = __uverbs_create_xsrq(file, ib_dev, &xcmd, &udata);
3612         if (ret)
3613                 return ret;
3614
3615         return in_len;
3616 }
3617
3618 ssize_t ib_uverbs_create_xsrq(struct ib_uverbs_file *file,
3619                               struct ib_device *ib_dev,
3620                               const char __user *buf, int in_len, int out_len)
3621 {
3622         struct ib_uverbs_create_xsrq     cmd;
3623         struct ib_uverbs_create_srq_resp resp;
3624         struct ib_udata                  udata;
3625         int ret;
3626
3627         if (out_len < sizeof resp)
3628                 return -ENOSPC;
3629
3630         if (copy_from_user(&cmd, buf, sizeof cmd))
3631                 return -EFAULT;
3632
3633         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
3634                    u64_to_user_ptr(cmd.response) + sizeof(resp),
3635                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
3636                    out_len - sizeof(resp));
3637
3638         ret = __uverbs_create_xsrq(file, ib_dev, &cmd, &udata);
3639         if (ret)
3640                 return ret;
3641
3642         return in_len;
3643 }
3644
3645 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
3646                              struct ib_device *ib_dev,
3647                              const char __user *buf, int in_len,
3648                              int out_len)
3649 {
3650         struct ib_uverbs_modify_srq cmd;
3651         struct ib_udata             udata;
3652         struct ib_srq              *srq;
3653         struct ib_srq_attr          attr;
3654         int                         ret;
3655
3656         if (copy_from_user(&cmd, buf, sizeof cmd))
3657                 return -EFAULT;
3658
3659         ib_uverbs_init_udata(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
3660                    out_len);
3661
3662         srq = uobj_get_obj_read(srq, cmd.srq_handle, file->ucontext);
3663         if (!srq)
3664                 return -EINVAL;
3665
3666         attr.max_wr    = cmd.max_wr;
3667         attr.srq_limit = cmd.srq_limit;
3668
3669         ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata);
3670
3671         uobj_put_obj_read(srq);
3672
3673         return ret ? ret : in_len;
3674 }
3675
3676 ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
3677                             struct ib_device *ib_dev,
3678                             const char __user *buf,
3679                             int in_len, int out_len)
3680 {
3681         struct ib_uverbs_query_srq      cmd;
3682         struct ib_uverbs_query_srq_resp resp;
3683         struct ib_srq_attr              attr;
3684         struct ib_srq                   *srq;
3685         int                             ret;
3686
3687         if (out_len < sizeof resp)
3688                 return -ENOSPC;
3689
3690         if (copy_from_user(&cmd, buf, sizeof cmd))
3691                 return -EFAULT;
3692
3693         srq = uobj_get_obj_read(srq, cmd.srq_handle, file->ucontext);
3694         if (!srq)
3695                 return -EINVAL;
3696
3697         ret = ib_query_srq(srq, &attr);
3698
3699         uobj_put_obj_read(srq);
3700
3701         if (ret)
3702                 return ret;
3703
3704         memset(&resp, 0, sizeof resp);
3705
3706         resp.max_wr    = attr.max_wr;
3707         resp.max_sge   = attr.max_sge;
3708         resp.srq_limit = attr.srq_limit;
3709
3710         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
3711                 return -EFAULT;
3712
3713         return in_len;
3714 }
3715
3716 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
3717                               struct ib_device *ib_dev,
3718                               const char __user *buf, int in_len,
3719                               int out_len)
3720 {
3721         struct ib_uverbs_destroy_srq      cmd;
3722         struct ib_uverbs_destroy_srq_resp resp;
3723         struct ib_uobject                *uobj;
3724         struct ib_uevent_object          *obj;
3725         int                               ret = -EINVAL;
3726
3727         if (copy_from_user(&cmd, buf, sizeof cmd))
3728                 return -EFAULT;
3729
3730         uobj  = uobj_get_write(uobj_get_type(srq), cmd.srq_handle,
3731                                file->ucontext);
3732         if (IS_ERR(uobj))
3733                 return PTR_ERR(uobj);
3734
3735         obj = container_of(uobj, struct ib_uevent_object, uobject);
3736         /*
3737          * Make sure we don't free the memory in remove_commit as we still
3738          * needs the uobject memory to create the response.
3739          */
3740         uverbs_uobject_get(uobj);
3741
3742         memset(&resp, 0, sizeof(resp));
3743
3744         ret = uobj_remove_commit(uobj);
3745         if (ret) {
3746                 uverbs_uobject_put(uobj);
3747                 return ret;
3748         }
3749         resp.events_reported = obj->events_reported;
3750         uverbs_uobject_put(uobj);
3751         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof(resp)))
3752                 return -EFAULT;
3753
3754         return in_len;
3755 }
3756
3757 int ib_uverbs_ex_query_device(struct ib_uverbs_file *file,
3758                               struct ib_device *ib_dev,
3759                               struct ib_udata *ucore,
3760                               struct ib_udata *uhw)
3761 {
3762         struct ib_uverbs_ex_query_device_resp resp = { {0} };
3763         struct ib_uverbs_ex_query_device  cmd;
3764         struct ib_device_attr attr = {0};
3765         int err;
3766
3767         if (ucore->inlen < sizeof(cmd))
3768                 return -EINVAL;
3769
3770         err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3771         if (err)
3772                 return err;
3773
3774         if (cmd.comp_mask)
3775                 return -EINVAL;
3776
3777         if (cmd.reserved)
3778                 return -EINVAL;
3779
3780         resp.response_length = offsetof(typeof(resp), odp_caps);
3781
3782         if (ucore->outlen < resp.response_length)
3783                 return -ENOSPC;
3784
3785         err = ib_dev->query_device(ib_dev, &attr, uhw);
3786         if (err)
3787                 return err;
3788
3789         copy_query_dev_fields(file, ib_dev, &resp.base, &attr);
3790
3791         if (ucore->outlen < resp.response_length + sizeof(resp.odp_caps))
3792                 goto end;
3793
3794 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
3795         resp.odp_caps.general_caps = attr.odp_caps.general_caps;
3796         resp.odp_caps.per_transport_caps.rc_odp_caps =
3797                 attr.odp_caps.per_transport_caps.rc_odp_caps;
3798         resp.odp_caps.per_transport_caps.uc_odp_caps =
3799                 attr.odp_caps.per_transport_caps.uc_odp_caps;
3800         resp.odp_caps.per_transport_caps.ud_odp_caps =
3801                 attr.odp_caps.per_transport_caps.ud_odp_caps;
3802 #endif
3803         resp.response_length += sizeof(resp.odp_caps);
3804
3805         if (ucore->outlen < resp.response_length + sizeof(resp.timestamp_mask))
3806                 goto end;
3807
3808         resp.timestamp_mask = attr.timestamp_mask;
3809         resp.response_length += sizeof(resp.timestamp_mask);
3810
3811         if (ucore->outlen < resp.response_length + sizeof(resp.hca_core_clock))
3812                 goto end;
3813
3814         resp.hca_core_clock = attr.hca_core_clock;
3815         resp.response_length += sizeof(resp.hca_core_clock);
3816
3817         if (ucore->outlen < resp.response_length + sizeof(resp.device_cap_flags_ex))
3818                 goto end;
3819
3820         resp.device_cap_flags_ex = attr.device_cap_flags;
3821         resp.response_length += sizeof(resp.device_cap_flags_ex);
3822
3823         if (ucore->outlen < resp.response_length + sizeof(resp.rss_caps))
3824                 goto end;
3825
3826         resp.rss_caps.supported_qpts = attr.rss_caps.supported_qpts;
3827         resp.rss_caps.max_rwq_indirection_tables =
3828                 attr.rss_caps.max_rwq_indirection_tables;
3829         resp.rss_caps.max_rwq_indirection_table_size =
3830                 attr.rss_caps.max_rwq_indirection_table_size;
3831
3832         resp.response_length += sizeof(resp.rss_caps);
3833
3834         if (ucore->outlen < resp.response_length + sizeof(resp.max_wq_type_rq))
3835                 goto end;
3836
3837         resp.max_wq_type_rq = attr.max_wq_type_rq;
3838         resp.response_length += sizeof(resp.max_wq_type_rq);
3839
3840         if (ucore->outlen < resp.response_length + sizeof(resp.raw_packet_caps))
3841                 goto end;
3842
3843         resp.raw_packet_caps = attr.raw_packet_caps;
3844         resp.response_length += sizeof(resp.raw_packet_caps);
3845
3846         if (ucore->outlen < resp.response_length + sizeof(resp.tm_caps))
3847                 goto end;
3848
3849         resp.tm_caps.max_rndv_hdr_size  = attr.tm_caps.max_rndv_hdr_size;
3850         resp.tm_caps.max_num_tags       = attr.tm_caps.max_num_tags;
3851         resp.tm_caps.max_ops            = attr.tm_caps.max_ops;
3852         resp.tm_caps.max_sge            = attr.tm_caps.max_sge;
3853         resp.tm_caps.flags              = attr.tm_caps.flags;
3854         resp.response_length += sizeof(resp.tm_caps);
3855
3856         if (ucore->outlen < resp.response_length + sizeof(resp.cq_moderation_caps))
3857                 goto end;
3858
3859         resp.cq_moderation_caps.max_cq_moderation_count  =
3860                 attr.cq_caps.max_cq_moderation_count;
3861         resp.cq_moderation_caps.max_cq_moderation_period =
3862                 attr.cq_caps.max_cq_moderation_period;
3863         resp.response_length += sizeof(resp.cq_moderation_caps);
3864 end:
3865         err = ib_copy_to_udata(ucore, &resp, resp.response_length);
3866         return err;
3867 }
3868
3869 int ib_uverbs_ex_modify_cq(struct ib_uverbs_file *file,
3870                            struct ib_device *ib_dev,
3871                            struct ib_udata *ucore,
3872                            struct ib_udata *uhw)
3873 {
3874         struct ib_uverbs_ex_modify_cq cmd = {};
3875         struct ib_cq *cq;
3876         size_t required_cmd_sz;
3877         int ret;
3878
3879         required_cmd_sz = offsetof(typeof(cmd), reserved) +
3880                                 sizeof(cmd.reserved);
3881         if (ucore->inlen < required_cmd_sz)
3882                 return -EINVAL;
3883
3884         /* sanity checks */
3885         if (ucore->inlen > sizeof(cmd) &&
3886             !ib_is_udata_cleared(ucore, sizeof(cmd),
3887                                  ucore->inlen - sizeof(cmd)))
3888                 return -EOPNOTSUPP;
3889
3890         ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
3891         if (ret)
3892                 return ret;
3893
3894         if (!cmd.attr_mask || cmd.reserved)
3895                 return -EINVAL;
3896
3897         if (cmd.attr_mask > IB_CQ_MODERATE)
3898                 return -EOPNOTSUPP;
3899
3900         cq = uobj_get_obj_read(cq, cmd.cq_handle, file->ucontext);
3901         if (!cq)
3902                 return -EINVAL;
3903
3904         ret = rdma_set_cq_moderation(cq, cmd.attr.cq_count, cmd.attr.cq_period);
3905
3906         uobj_put_obj_read(cq);
3907
3908         return ret;
3909 }