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(UVERBS_OBJECT_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(UVERBS_OBJECT_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         pd->res.type = RDMA_RESTRACK_PD;
 344         rdma_restrack_add(&pd->res);
 345
 346         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
 347                 ret = -EFAULT;
 348                 goto err_copy;
 349         }
 350
 351         uobj_alloc_commit(uobj);
 352
 353         return in_len;
 354
 355 err_copy:
 356         ib_dealloc_pd(pd);
 357
 358 err:
 359         uobj_alloc_abort(uobj);
 360         return ret;
 361 }
 362
 363 ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
 364                              struct ib_device *ib_dev,
 365                              const char __user *buf,
 366                              int in_len, int out_len)
 367 {
 368         struct ib_uverbs_dealloc_pd cmd;
 369         struct ib_uobject          *uobj;
 370         int                         ret;
 371
 372         if (copy_from_user(&cmd, buf, sizeof cmd))
 373                 return -EFAULT;
 374
 375         uobj  = uobj_get_write(UVERBS_OBJECT_PD, cmd.pd_handle,
 376                                file->ucontext);
 377         if (IS_ERR(uobj))
 378                 return PTR_ERR(uobj);
 379
 380         ret = uobj_remove_commit(uobj);
 381
 382         return ret ?: in_len;
 383 }
 384
 385 struct xrcd_table_entry {
 386         struct rb_node  node;
 387         struct ib_xrcd *xrcd;
 388         struct inode   *inode;
 389 };
 390
 391 static int xrcd_table_insert(struct ib_uverbs_device *dev,
 392                             struct inode *inode,
 393                             struct ib_xrcd *xrcd)
 394 {
 395         struct xrcd_table_entry *entry, *scan;
 396         struct rb_node **p = &dev->xrcd_tree.rb_node;
 397         struct rb_node *parent = NULL;
 398
 399         entry = kmalloc(sizeof *entry, GFP_KERNEL);
 400         if (!entry)
 401                 return -ENOMEM;
 402
 403         entry->xrcd  = xrcd;
 404         entry->inode = inode;
 405
 406         while (*p) {
 407                 parent = *p;
 408                 scan = rb_entry(parent, struct xrcd_table_entry, node);
 409
 410                 if (inode < scan->inode) {
 411                         p = &(*p)->rb_left;
 412                 } else if (inode > scan->inode) {
 413                         p = &(*p)->rb_right;
 414                 } else {
 415                         kfree(entry);
 416                         return -EEXIST;
 417                 }
 418         }
 419
 420         rb_link_node(&entry->node, parent, p);
 421         rb_insert_color(&entry->node, &dev->xrcd_tree);
 422         igrab(inode);
 423         return 0;
 424 }
 425
 426 static struct xrcd_table_entry *xrcd_table_search(struct ib_uverbs_device *dev,
 427                                                   struct inode *inode)
 428 {
 429         struct xrcd_table_entry *entry;
 430         struct rb_node *p = dev->xrcd_tree.rb_node;
 431
 432         while (p) {
 433                 entry = rb_entry(p, struct xrcd_table_entry, node);
 434
 435                 if (inode < entry->inode)
 436                         p = p->rb_left;
 437                 else if (inode > entry->inode)
 438                         p = p->rb_right;
 439                 else
 440                         return entry;
 441         }
 442
 443         return NULL;
 444 }
 445
 446 static struct ib_xrcd *find_xrcd(struct ib_uverbs_device *dev, struct inode *inode)
 447 {
 448         struct xrcd_table_entry *entry;
 449
 450         entry = xrcd_table_search(dev, inode);
 451         if (!entry)
 452                 return NULL;
 453
 454         return entry->xrcd;
 455 }
 456
 457 static void xrcd_table_delete(struct ib_uverbs_device *dev,
 458                               struct inode *inode)
 459 {
 460         struct xrcd_table_entry *entry;
 461
 462         entry = xrcd_table_search(dev, inode);
 463         if (entry) {
 464                 iput(inode);
 465                 rb_erase(&entry->node, &dev->xrcd_tree);
 466                 kfree(entry);
 467         }
 468 }
 469
 470 ssize_t ib_uverbs_open_xrcd(struct ib_uverbs_file *file,
 471                             struct ib_device *ib_dev,
 472                             const char __user *buf, int in_len,
 473                             int out_len)
 474 {
 475         struct ib_uverbs_open_xrcd      cmd;
 476         struct ib_uverbs_open_xrcd_resp resp;
 477         struct ib_udata                 udata;
 478         struct ib_uxrcd_object         *obj;
 479         struct ib_xrcd                 *xrcd = NULL;
 480         struct fd                       f = {NULL, 0};
 481         struct inode                   *inode = NULL;
 482         int                             ret = 0;
 483         int                             new_xrcd = 0;
 484
 485         if (out_len < sizeof resp)
 486                 return -ENOSPC;
 487
 488         if (copy_from_user(&cmd, buf, sizeof cmd))
 489                 return -EFAULT;
 490
 491         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
 492                    u64_to_user_ptr(cmd.response) + sizeof(resp),
 493                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
 494                    out_len - sizeof(resp));
 495
 496         mutex_lock(&file->device->xrcd_tree_mutex);
 497
 498         if (cmd.fd != -1) {
 499                 /* search for file descriptor */
 500                 f = fdget(cmd.fd);
 501                 if (!f.file) {
 502                         ret = -EBADF;
 503                         goto err_tree_mutex_unlock;
 504                 }
 505
 506                 inode = file_inode(f.file);
 507                 xrcd = find_xrcd(file->device, inode);
 508                 if (!xrcd && !(cmd.oflags & O_CREAT)) {
 509                         /* no file descriptor. Need CREATE flag */
 510                         ret = -EAGAIN;
 511                         goto err_tree_mutex_unlock;
 512                 }
 513
 514                 if (xrcd && cmd.oflags & O_EXCL) {
 515                         ret = -EINVAL;
 516                         goto err_tree_mutex_unlock;
 517                 }
 518         }
 519
 520         obj  = (struct ib_uxrcd_object *)uobj_alloc(UVERBS_OBJECT_XRCD,
 521                                                     file->ucontext);
 522         if (IS_ERR(obj)) {
 523                 ret = PTR_ERR(obj);
 524                 goto err_tree_mutex_unlock;
 525         }
 526
 527         if (!xrcd) {
 528                 xrcd = ib_dev->alloc_xrcd(ib_dev, file->ucontext, &udata);
 529                 if (IS_ERR(xrcd)) {
 530                         ret = PTR_ERR(xrcd);
 531                         goto err;
 532                 }
 533
 534                 xrcd->inode   = inode;
 535                 xrcd->device  = ib_dev;
 536                 atomic_set(&xrcd->usecnt, 0);
 537                 mutex_init(&xrcd->tgt_qp_mutex);
 538                 INIT_LIST_HEAD(&xrcd->tgt_qp_list);
 539                 new_xrcd = 1;
 540         }
 541
 542         atomic_set(&obj->refcnt, 0);
 543         obj->uobject.object = xrcd;
 544         memset(&resp, 0, sizeof resp);
 545         resp.xrcd_handle = obj->uobject.id;
 546
 547         if (inode) {
 548                 if (new_xrcd) {
 549                         /* create new inode/xrcd table entry */
 550                         ret = xrcd_table_insert(file->device, inode, xrcd);
 551                         if (ret)
 552                                 goto err_dealloc_xrcd;
 553                 }
 554                 atomic_inc(&xrcd->usecnt);
 555         }
 556
 557         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
 558                 ret = -EFAULT;
 559                 goto err_copy;
 560         }
 561
 562         if (f.file)
 563                 fdput(f);
 564
 565         mutex_unlock(&file->device->xrcd_tree_mutex);
 566
 567         uobj_alloc_commit(&obj->uobject);
 568
 569         return in_len;
 570
 571 err_copy:
 572         if (inode) {
 573                 if (new_xrcd)
 574                         xrcd_table_delete(file->device, inode);
 575                 atomic_dec(&xrcd->usecnt);
 576         }
 577
 578 err_dealloc_xrcd:
 579         ib_dealloc_xrcd(xrcd);
 580
 581 err:
 582         uobj_alloc_abort(&obj->uobject);
 583
 584 err_tree_mutex_unlock:
 585         if (f.file)
 586                 fdput(f);
 587
 588         mutex_unlock(&file->device->xrcd_tree_mutex);
 589
 590         return ret;
 591 }
 592
 593 ssize_t ib_uverbs_close_xrcd(struct ib_uverbs_file *file,
 594                              struct ib_device *ib_dev,
 595                              const char __user *buf, int in_len,
 596                              int out_len)
 597 {
 598         struct ib_uverbs_close_xrcd cmd;
 599         struct ib_uobject           *uobj;
 600         int                         ret = 0;
 601
 602         if (copy_from_user(&cmd, buf, sizeof cmd))
 603                 return -EFAULT;
 604
 605         uobj  = uobj_get_write(UVERBS_OBJECT_XRCD, cmd.xrcd_handle,
 606                                file->ucontext);
 607         if (IS_ERR(uobj))
 608                 return PTR_ERR(uobj);
 609
 610         ret = uobj_remove_commit(uobj);
 611         return ret ?: in_len;
 612 }
 613
 614 int ib_uverbs_dealloc_xrcd(struct ib_uverbs_device *dev,
 615                            struct ib_xrcd *xrcd,
 616                            enum rdma_remove_reason why)
 617 {
 618         struct inode *inode;
 619         int ret;
 620
 621         inode = xrcd->inode;
 622         if (inode && !atomic_dec_and_test(&xrcd->usecnt))
 623                 return 0;
 624
 625         ret = ib_dealloc_xrcd(xrcd);
 626
 627         if (why == RDMA_REMOVE_DESTROY && ret)
 628                 atomic_inc(&xrcd->usecnt);
 629         else if (inode)
 630                 xrcd_table_delete(dev, inode);
 631
 632         return ret;
 633 }
 634
 635 ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
 636                          struct ib_device *ib_dev,
 637                          const char __user *buf, int in_len,
 638                          int out_len)
 639 {
 640         struct ib_uverbs_reg_mr      cmd;
 641         struct ib_uverbs_reg_mr_resp resp;
 642         struct ib_udata              udata;
 643         struct ib_uobject           *uobj;
 644         struct ib_pd                *pd;
 645         struct ib_mr                *mr;
 646         int                          ret;
 647
 648         if (out_len < sizeof resp)
 649                 return -ENOSPC;
 650
 651         if (copy_from_user(&cmd, buf, sizeof cmd))
 652                 return -EFAULT;
 653
 654         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
 655                    u64_to_user_ptr(cmd.response) + sizeof(resp),
 656                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
 657                    out_len - sizeof(resp));
 658
 659         if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
 660                 return -EINVAL;
 661
 662         ret = ib_check_mr_access(cmd.access_flags);
 663         if (ret)
 664                 return ret;
 665
 666         uobj  = uobj_alloc(UVERBS_OBJECT_MR, file->ucontext);
 667         if (IS_ERR(uobj))
 668                 return PTR_ERR(uobj);
 669
 670         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, file->ucontext);
 671         if (!pd) {
 672                 ret = -EINVAL;
 673                 goto err_free;
 674         }
 675
 676         if (cmd.access_flags & IB_ACCESS_ON_DEMAND) {
 677                 if (!(pd->device->attrs.device_cap_flags &
 678                       IB_DEVICE_ON_DEMAND_PAGING)) {
 679                         pr_debug("ODP support not available\n");
 680                         ret = -EINVAL;
 681                         goto err_put;
 682                 }
 683         }
 684
 685         mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
 686                                      cmd.access_flags, &udata);
 687         if (IS_ERR(mr)) {
 688                 ret = PTR_ERR(mr);
 689                 goto err_put;
 690         }
 691
 692         mr->device  = pd->device;
 693         mr->pd      = pd;
 694         mr->dm      = NULL;
 695         mr->uobject = uobj;
 696         atomic_inc(&pd->usecnt);
 697         mr->res.type = RDMA_RESTRACK_MR;
 698         rdma_restrack_add(&mr->res);
 699
 700         uobj->object = mr;
 701
 702         memset(&resp, 0, sizeof resp);
 703         resp.lkey      = mr->lkey;
 704         resp.rkey      = mr->rkey;
 705         resp.mr_handle = uobj->id;
 706
 707         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
 708                 ret = -EFAULT;
 709                 goto err_copy;
 710         }
 711
 712         uobj_put_obj_read(pd);
 713
 714         uobj_alloc_commit(uobj);
 715
 716         return in_len;
 717
 718 err_copy:
 719         ib_dereg_mr(mr);
 720
 721 err_put:
 722         uobj_put_obj_read(pd);
 723
 724 err_free:
 725         uobj_alloc_abort(uobj);
 726         return ret;
 727 }
 728
 729 ssize_t ib_uverbs_rereg_mr(struct ib_uverbs_file *file,
 730                            struct ib_device *ib_dev,
 731                            const char __user *buf, int in_len,
 732                            int out_len)
 733 {
 734         struct ib_uverbs_rereg_mr      cmd;
 735         struct ib_uverbs_rereg_mr_resp resp;
 736         struct ib_udata              udata;
 737         struct ib_pd                *pd = NULL;
 738         struct ib_mr                *mr;
 739         struct ib_pd                *old_pd;
 740         int                          ret;
 741         struct ib_uobject           *uobj;
 742
 743         if (out_len < sizeof(resp))
 744                 return -ENOSPC;
 745
 746         if (copy_from_user(&cmd, buf, sizeof(cmd)))
 747                 return -EFAULT;
 748
 749         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
 750                    u64_to_user_ptr(cmd.response) + sizeof(resp),
 751                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
 752                    out_len - sizeof(resp));
 753
 754         if (cmd.flags & ~IB_MR_REREG_SUPPORTED || !cmd.flags)
 755                 return -EINVAL;
 756
 757         if ((cmd.flags & IB_MR_REREG_TRANS) &&
 758             (!cmd.start || !cmd.hca_va || 0 >= cmd.length ||
 759              (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)))
 760                         return -EINVAL;
 761
 762         uobj  = uobj_get_write(UVERBS_OBJECT_MR, cmd.mr_handle,
 763                                file->ucontext);
 764         if (IS_ERR(uobj))
 765                 return PTR_ERR(uobj);
 766
 767         mr = uobj->object;
 768
 769         if (mr->dm) {
 770                 ret = -EINVAL;
 771                 goto put_uobjs;
 772         }
 773
 774         if (cmd.flags & IB_MR_REREG_ACCESS) {
 775                 ret = ib_check_mr_access(cmd.access_flags);
 776                 if (ret)
 777                         goto put_uobjs;
 778         }
 779
 780         if (cmd.flags & IB_MR_REREG_PD) {
 781                 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, file->ucontext);
 782                 if (!pd) {
 783                         ret = -EINVAL;
 784                         goto put_uobjs;
 785                 }
 786         }
 787
 788         old_pd = mr->pd;
 789         ret = mr->device->rereg_user_mr(mr, cmd.flags, cmd.start,
 790                                         cmd.length, cmd.hca_va,
 791                                         cmd.access_flags, pd, &udata);
 792         if (!ret) {
 793                 if (cmd.flags & IB_MR_REREG_PD) {
 794                         atomic_inc(&pd->usecnt);
 795                         mr->pd = pd;
 796                         atomic_dec(&old_pd->usecnt);
 797                 }
 798         } else {
 799                 goto put_uobj_pd;
 800         }
 801
 802         memset(&resp, 0, sizeof(resp));
 803         resp.lkey      = mr->lkey;
 804         resp.rkey      = mr->rkey;
 805
 806         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof(resp)))
 807                 ret = -EFAULT;
 808         else
 809                 ret = in_len;
 810
 811 put_uobj_pd:
 812         if (cmd.flags & IB_MR_REREG_PD)
 813                 uobj_put_obj_read(pd);
 814
 815 put_uobjs:
 816         uobj_put_write(uobj);
 817
 818         return ret;
 819 }
 820
 821 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
 822                            struct ib_device *ib_dev,
 823                            const char __user *buf, int in_len,
 824                            int out_len)
 825 {
 826         struct ib_uverbs_dereg_mr cmd;
 827         struct ib_uobject        *uobj;
 828         int                       ret = -EINVAL;
 829
 830         if (copy_from_user(&cmd, buf, sizeof cmd))
 831                 return -EFAULT;
 832
 833         uobj  = uobj_get_write(UVERBS_OBJECT_MR, cmd.mr_handle,
 834                                file->ucontext);
 835         if (IS_ERR(uobj))
 836                 return PTR_ERR(uobj);
 837
 838         ret = uobj_remove_commit(uobj);
 839
 840         return ret ?: in_len;
 841 }
 842
 843 ssize_t ib_uverbs_alloc_mw(struct ib_uverbs_file *file,
 844                            struct ib_device *ib_dev,
 845                            const char __user *buf, int in_len,
 846                            int out_len)
 847 {
 848         struct ib_uverbs_alloc_mw      cmd;
 849         struct ib_uverbs_alloc_mw_resp resp;
 850         struct ib_uobject             *uobj;
 851         struct ib_pd                  *pd;
 852         struct ib_mw                  *mw;
 853         struct ib_udata                udata;
 854         int                            ret;
 855
 856         if (out_len < sizeof(resp))
 857                 return -ENOSPC;
 858
 859         if (copy_from_user(&cmd, buf, sizeof(cmd)))
 860                 return -EFAULT;
 861
 862         uobj  = uobj_alloc(UVERBS_OBJECT_MW, file->ucontext);
 863         if (IS_ERR(uobj))
 864                 return PTR_ERR(uobj);
 865
 866         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, file->ucontext);
 867         if (!pd) {
 868                 ret = -EINVAL;
 869                 goto err_free;
 870         }
 871
 872         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
 873                    u64_to_user_ptr(cmd.response) + sizeof(resp),
 874                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
 875                    out_len - sizeof(resp));
 876
 877         mw = pd->device->alloc_mw(pd, cmd.mw_type, &udata);
 878         if (IS_ERR(mw)) {
 879                 ret = PTR_ERR(mw);
 880                 goto err_put;
 881         }
 882
 883         mw->device  = pd->device;
 884         mw->pd      = pd;
 885         mw->uobject = uobj;
 886         atomic_inc(&pd->usecnt);
 887
 888         uobj->object = mw;
 889
 890         memset(&resp, 0, sizeof(resp));
 891         resp.rkey      = mw->rkey;
 892         resp.mw_handle = uobj->id;
 893
 894         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof(resp))) {
 895                 ret = -EFAULT;
 896                 goto err_copy;
 897         }
 898
 899         uobj_put_obj_read(pd);
 900         uobj_alloc_commit(uobj);
 901
 902         return in_len;
 903
 904 err_copy:
 905         uverbs_dealloc_mw(mw);
 906 err_put:
 907         uobj_put_obj_read(pd);
 908 err_free:
 909         uobj_alloc_abort(uobj);
 910         return ret;
 911 }
 912
 913 ssize_t ib_uverbs_dealloc_mw(struct ib_uverbs_file *file,
 914                              struct ib_device *ib_dev,
 915                              const char __user *buf, int in_len,
 916                              int out_len)
 917 {
 918         struct ib_uverbs_dealloc_mw cmd;
 919         struct ib_uobject          *uobj;
 920         int                         ret = -EINVAL;
 921
 922         if (copy_from_user(&cmd, buf, sizeof(cmd)))
 923                 return -EFAULT;
 924
 925         uobj  = uobj_get_write(UVERBS_OBJECT_MW, cmd.mw_handle,
 926                                file->ucontext);
 927         if (IS_ERR(uobj))
 928                 return PTR_ERR(uobj);
 929
 930         ret = uobj_remove_commit(uobj);
 931         return ret ?: in_len;
 932 }
 933
 934 ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
 935                                       struct ib_device *ib_dev,
 936                                       const char __user *buf, int in_len,
 937                                       int out_len)
 938 {
 939         struct ib_uverbs_create_comp_channel       cmd;
 940         struct ib_uverbs_create_comp_channel_resp  resp;
 941         struct ib_uobject                         *uobj;
 942         struct ib_uverbs_completion_event_file    *ev_file;
 943
 944         if (out_len < sizeof resp)
 945                 return -ENOSPC;
 946
 947         if (copy_from_user(&cmd, buf, sizeof cmd))
 948                 return -EFAULT;
 949
 950         uobj = uobj_alloc(UVERBS_OBJECT_COMP_CHANNEL, file->ucontext);
 951         if (IS_ERR(uobj))
 952                 return PTR_ERR(uobj);
 953
 954         resp.fd = uobj->id;
 955
 956         ev_file = container_of(uobj, struct ib_uverbs_completion_event_file,
 957                                uobj_file.uobj);
 958         ib_uverbs_init_event_queue(&ev_file->ev_queue);
 959
 960         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
 961                 uobj_alloc_abort(uobj);
 962                 return -EFAULT;
 963         }
 964
 965         uobj_alloc_commit(uobj);
 966         return in_len;
 967 }
 968
 969 static struct ib_ucq_object *create_cq(struct ib_uverbs_file *file,
 970                                         struct ib_device *ib_dev,
 971                                        struct ib_udata *ucore,
 972                                        struct ib_udata *uhw,
 973                                        struct ib_uverbs_ex_create_cq *cmd,
 974                                        size_t cmd_sz,
 975                                        int (*cb)(struct ib_uverbs_file *file,
 976                                                  struct ib_ucq_object *obj,
 977                                                  struct ib_uverbs_ex_create_cq_resp *resp,
 978                                                  struct ib_udata *udata,
 979                                                  void *context),
 980                                        void *context)
 981 {
 982         struct ib_ucq_object           *obj;
 983         struct ib_uverbs_completion_event_file    *ev_file = NULL;
 984         struct ib_cq                   *cq;
 985         int                             ret;
 986         struct ib_uverbs_ex_create_cq_resp resp;
 987         struct ib_cq_init_attr attr = {};
 988
 989         if (!ib_dev->create_cq)
 990                 return ERR_PTR(-EOPNOTSUPP);
 991
 992         if (cmd->comp_vector >= file->device->num_comp_vectors)
 993                 return ERR_PTR(-EINVAL);
 994
 995         obj  = (struct ib_ucq_object *)uobj_alloc(UVERBS_OBJECT_CQ,
 996                                                   file->ucontext);
 997         if (IS_ERR(obj))
 998                 return obj;
 999
1000         if (cmd->comp_channel >= 0) {
1001                 ev_file = ib_uverbs_lookup_comp_file(cmd->comp_channel,
1002                                                      file->ucontext);
1003                 if (IS_ERR(ev_file)) {
1004                         ret = PTR_ERR(ev_file);
1005                         goto err;
1006                 }
1007         }
1008
1009         obj->uobject.user_handle = cmd->user_handle;
1010         obj->uverbs_file           = file;
1011         obj->comp_events_reported  = 0;
1012         obj->async_events_reported = 0;
1013         INIT_LIST_HEAD(&obj->comp_list);
1014         INIT_LIST_HEAD(&obj->async_list);
1015
1016         attr.cqe = cmd->cqe;
1017         attr.comp_vector = cmd->comp_vector;
1018
1019         if (cmd_sz > offsetof(typeof(*cmd), flags) + sizeof(cmd->flags))
1020                 attr.flags = cmd->flags;
1021
1022         cq = ib_dev->create_cq(ib_dev, &attr, file->ucontext, uhw);
1023         if (IS_ERR(cq)) {
1024                 ret = PTR_ERR(cq);
1025                 goto err_file;
1026         }
1027
1028         cq->device        = ib_dev;
1029         cq->uobject       = &obj->uobject;
1030         cq->comp_handler  = ib_uverbs_comp_handler;
1031         cq->event_handler = ib_uverbs_cq_event_handler;
1032         cq->cq_context    = ev_file ? &ev_file->ev_queue : NULL;
1033         atomic_set(&cq->usecnt, 0);
1034
1035         obj->uobject.object = cq;
1036         memset(&resp, 0, sizeof resp);
1037         resp.base.cq_handle = obj->uobject.id;
1038         resp.base.cqe       = cq->cqe;
1039
1040         resp.response_length = offsetof(typeof(resp), response_length) +
1041                 sizeof(resp.response_length);
1042
1043         cq->res.type = RDMA_RESTRACK_CQ;
1044         rdma_restrack_add(&cq->res);
1045
1046         ret = cb(file, obj, &resp, ucore, context);
1047         if (ret)
1048                 goto err_cb;
1049
1050         uobj_alloc_commit(&obj->uobject);
1051         return obj;
1052
1053 err_cb:
1054         ib_destroy_cq(cq);
1055
1056 err_file:
1057         if (ev_file)
1058                 ib_uverbs_release_ucq(file, ev_file, obj);
1059
1060 err:
1061         uobj_alloc_abort(&obj->uobject);
1062
1063         return ERR_PTR(ret);
1064 }
1065
1066 static int ib_uverbs_create_cq_cb(struct ib_uverbs_file *file,
1067                                   struct ib_ucq_object *obj,
1068                                   struct ib_uverbs_ex_create_cq_resp *resp,
1069                                   struct ib_udata *ucore, void *context)
1070 {
1071         if (ib_copy_to_udata(ucore, &resp->base, sizeof(resp->base)))
1072                 return -EFAULT;
1073
1074         return 0;
1075 }
1076
1077 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
1078                             struct ib_device *ib_dev,
1079                             const char __user *buf, int in_len,
1080                             int out_len)
1081 {
1082         struct ib_uverbs_create_cq      cmd;
1083         struct ib_uverbs_ex_create_cq   cmd_ex;
1084         struct ib_uverbs_create_cq_resp resp;
1085         struct ib_udata                 ucore;
1086         struct ib_udata                 uhw;
1087         struct ib_ucq_object           *obj;
1088
1089         if (out_len < sizeof(resp))
1090                 return -ENOSPC;
1091
1092         if (copy_from_user(&cmd, buf, sizeof(cmd)))
1093                 return -EFAULT;
1094
1095         ib_uverbs_init_udata(&ucore, buf, u64_to_user_ptr(cmd.response),
1096                              sizeof(cmd), sizeof(resp));
1097
1098         ib_uverbs_init_udata(&uhw, buf + sizeof(cmd),
1099                    u64_to_user_ptr(cmd.response) + sizeof(resp),
1100                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
1101                    out_len - sizeof(resp));
1102
1103         memset(&cmd_ex, 0, sizeof(cmd_ex));
1104         cmd_ex.user_handle = cmd.user_handle;
1105         cmd_ex.cqe = cmd.cqe;
1106         cmd_ex.comp_vector = cmd.comp_vector;
1107         cmd_ex.comp_channel = cmd.comp_channel;
1108
1109         obj = create_cq(file, ib_dev, &ucore, &uhw, &cmd_ex,
1110                         offsetof(typeof(cmd_ex), comp_channel) +
1111                         sizeof(cmd.comp_channel), ib_uverbs_create_cq_cb,
1112                         NULL);
1113
1114         if (IS_ERR(obj))
1115                 return PTR_ERR(obj);
1116
1117         return in_len;
1118 }
1119
1120 static int ib_uverbs_ex_create_cq_cb(struct ib_uverbs_file *file,
1121                                      struct ib_ucq_object *obj,
1122                                      struct ib_uverbs_ex_create_cq_resp *resp,
1123                                      struct ib_udata *ucore, void *context)
1124 {
1125         if (ib_copy_to_udata(ucore, resp, resp->response_length))
1126                 return -EFAULT;
1127
1128         return 0;
1129 }
1130
1131 int ib_uverbs_ex_create_cq(struct ib_uverbs_file *file,
1132                          struct ib_device *ib_dev,
1133                            struct ib_udata *ucore,
1134                            struct ib_udata *uhw)
1135 {
1136         struct ib_uverbs_ex_create_cq_resp resp;
1137         struct ib_uverbs_ex_create_cq  cmd;
1138         struct ib_ucq_object           *obj;
1139         int err;
1140
1141         if (ucore->inlen < sizeof(cmd))
1142                 return -EINVAL;
1143
1144         err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
1145         if (err)
1146                 return err;
1147
1148         if (cmd.comp_mask)
1149                 return -EINVAL;
1150
1151         if (cmd.reserved)
1152                 return -EINVAL;
1153
1154         if (ucore->outlen < (offsetof(typeof(resp), response_length) +
1155                              sizeof(resp.response_length)))
1156                 return -ENOSPC;
1157
1158         obj = create_cq(file, ib_dev, ucore, uhw, &cmd,
1159                         min(ucore->inlen, sizeof(cmd)),
1160                         ib_uverbs_ex_create_cq_cb, NULL);
1161
1162         return PTR_ERR_OR_ZERO(obj);
1163 }
1164
1165 ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
1166                             struct ib_device *ib_dev,
1167                             const char __user *buf, int in_len,
1168                             int out_len)
1169 {
1170         struct ib_uverbs_resize_cq      cmd;
1171         struct ib_uverbs_resize_cq_resp resp = {};
1172         struct ib_udata                 udata;
1173         struct ib_cq                    *cq;
1174         int                             ret = -EINVAL;
1175
1176         if (copy_from_user(&cmd, buf, sizeof cmd))
1177                 return -EFAULT;
1178
1179         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
1180                    u64_to_user_ptr(cmd.response) + sizeof(resp),
1181                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
1182                    out_len - sizeof(resp));
1183
1184         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, file->ucontext);
1185         if (!cq)
1186                 return -EINVAL;
1187
1188         ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
1189         if (ret)
1190                 goto out;
1191
1192         resp.cqe = cq->cqe;
1193
1194         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp.cqe))
1195                 ret = -EFAULT;
1196
1197 out:
1198         uobj_put_obj_read(cq);
1199
1200         return ret ? ret : in_len;
1201 }
1202
1203 static int copy_wc_to_user(struct ib_device *ib_dev, void __user *dest,
1204                            struct ib_wc *wc)
1205 {
1206         struct ib_uverbs_wc tmp;
1207
1208         tmp.wr_id               = wc->wr_id;
1209         tmp.status              = wc->status;
1210         tmp.opcode              = wc->opcode;
1211         tmp.vendor_err          = wc->vendor_err;
1212         tmp.byte_len            = wc->byte_len;
1213         tmp.ex.imm_data         = wc->ex.imm_data;
1214         tmp.qp_num              = wc->qp->qp_num;
1215         tmp.src_qp              = wc->src_qp;
1216         tmp.wc_flags            = wc->wc_flags;
1217         tmp.pkey_index          = wc->pkey_index;
1218         if (rdma_cap_opa_ah(ib_dev, wc->port_num))
1219                 tmp.slid        = OPA_TO_IB_UCAST_LID(wc->slid);
1220         else
1221                 tmp.slid        = ib_lid_cpu16(wc->slid);
1222         tmp.sl                  = wc->sl;
1223         tmp.dlid_path_bits      = wc->dlid_path_bits;
1224         tmp.port_num            = wc->port_num;
1225         tmp.reserved            = 0;
1226
1227         if (copy_to_user(dest, &tmp, sizeof tmp))
1228                 return -EFAULT;
1229
1230         return 0;
1231 }
1232
1233 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
1234                           struct ib_device *ib_dev,
1235                           const char __user *buf, int in_len,
1236                           int out_len)
1237 {
1238         struct ib_uverbs_poll_cq       cmd;
1239         struct ib_uverbs_poll_cq_resp  resp;
1240         u8 __user                     *header_ptr;
1241         u8 __user                     *data_ptr;
1242         struct ib_cq                  *cq;
1243         struct ib_wc                   wc;
1244         int                            ret;
1245
1246         if (copy_from_user(&cmd, buf, sizeof cmd))
1247                 return -EFAULT;
1248
1249         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, file->ucontext);
1250         if (!cq)
1251                 return -EINVAL;
1252
1253         /* we copy a struct ib_uverbs_poll_cq_resp to user space */
1254         header_ptr = u64_to_user_ptr(cmd.response);
1255         data_ptr = header_ptr + sizeof resp;
1256
1257         memset(&resp, 0, sizeof resp);
1258         while (resp.count < cmd.ne) {
1259                 ret = ib_poll_cq(cq, 1, &wc);
1260                 if (ret < 0)
1261                         goto out_put;
1262                 if (!ret)
1263                         break;
1264
1265                 ret = copy_wc_to_user(ib_dev, data_ptr, &wc);
1266                 if (ret)
1267                         goto out_put;
1268
1269                 data_ptr += sizeof(struct ib_uverbs_wc);
1270                 ++resp.count;
1271         }
1272
1273         if (copy_to_user(header_ptr, &resp, sizeof resp)) {
1274                 ret = -EFAULT;
1275                 goto out_put;
1276         }
1277
1278         ret = in_len;
1279
1280 out_put:
1281         uobj_put_obj_read(cq);
1282         return ret;
1283 }
1284
1285 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
1286                                 struct ib_device *ib_dev,
1287                                 const char __user *buf, int in_len,
1288                                 int out_len)
1289 {
1290         struct ib_uverbs_req_notify_cq cmd;
1291         struct ib_cq                  *cq;
1292
1293         if (copy_from_user(&cmd, buf, sizeof cmd))
1294                 return -EFAULT;
1295
1296         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, file->ucontext);
1297         if (!cq)
1298                 return -EINVAL;
1299
1300         ib_req_notify_cq(cq, cmd.solicited_only ?
1301                          IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
1302
1303         uobj_put_obj_read(cq);
1304
1305         return in_len;
1306 }
1307
1308 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
1309                              struct ib_device *ib_dev,
1310                              const char __user *buf, int in_len,
1311                              int out_len)
1312 {
1313         struct ib_uverbs_destroy_cq      cmd;
1314         struct ib_uverbs_destroy_cq_resp resp;
1315         struct ib_uobject               *uobj;
1316         struct ib_cq                    *cq;
1317         struct ib_ucq_object            *obj;
1318         int                              ret = -EINVAL;
1319
1320         if (copy_from_user(&cmd, buf, sizeof cmd))
1321                 return -EFAULT;
1322
1323         uobj  = uobj_get_write(UVERBS_OBJECT_CQ, cmd.cq_handle,
1324                                file->ucontext);
1325         if (IS_ERR(uobj))
1326                 return PTR_ERR(uobj);
1327
1328         /*
1329          * Make sure we don't free the memory in remove_commit as we still
1330          * needs the uobject memory to create the response.
1331          */
1332         uverbs_uobject_get(uobj);
1333         cq      = uobj->object;
1334         obj     = container_of(cq->uobject, struct ib_ucq_object, uobject);
1335
1336         memset(&resp, 0, sizeof(resp));
1337
1338         ret = uobj_remove_commit(uobj);
1339         if (ret) {
1340                 uverbs_uobject_put(uobj);
1341                 return ret;
1342         }
1343
1344         resp.comp_events_reported  = obj->comp_events_reported;
1345         resp.async_events_reported = obj->async_events_reported;
1346
1347         uverbs_uobject_put(uobj);
1348         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
1349                 return -EFAULT;
1350
1351         return in_len;
1352 }
1353
1354 static int create_qp(struct ib_uverbs_file *file,
1355                      struct ib_udata *ucore,
1356                      struct ib_udata *uhw,
1357                      struct ib_uverbs_ex_create_qp *cmd,
1358                      size_t cmd_sz,
1359                      int (*cb)(struct ib_uverbs_file *file,
1360                                struct ib_uverbs_ex_create_qp_resp *resp,
1361                                struct ib_udata *udata),
1362                      void *context)
1363 {
1364         struct ib_uqp_object            *obj;
1365         struct ib_device                *device;
1366         struct ib_pd                    *pd = NULL;
1367         struct ib_xrcd                  *xrcd = NULL;
1368         struct ib_uobject               *xrcd_uobj = ERR_PTR(-ENOENT);
1369         struct ib_cq                    *scq = NULL, *rcq = NULL;
1370         struct ib_srq                   *srq = NULL;
1371         struct ib_qp                    *qp;
1372         char                            *buf;
1373         struct ib_qp_init_attr          attr = {};
1374         struct ib_uverbs_ex_create_qp_resp resp;
1375         int                             ret;
1376         struct ib_rwq_ind_table *ind_tbl = NULL;
1377         bool has_sq = true;
1378
1379         if (cmd->qp_type == IB_QPT_RAW_PACKET && !capable(CAP_NET_RAW))
1380                 return -EPERM;
1381
1382         obj  = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP,
1383                                                   file->ucontext);
1384         if (IS_ERR(obj))
1385                 return PTR_ERR(obj);
1386         obj->uxrcd = NULL;
1387         obj->uevent.uobject.user_handle = cmd->user_handle;
1388         mutex_init(&obj->mcast_lock);
1389
1390         if (cmd_sz >= offsetof(typeof(*cmd), rwq_ind_tbl_handle) +
1391                       sizeof(cmd->rwq_ind_tbl_handle) &&
1392                       (cmd->comp_mask & IB_UVERBS_CREATE_QP_MASK_IND_TABLE)) {
1393                 ind_tbl = uobj_get_obj_read(rwq_ind_table, UVERBS_OBJECT_RWQ_IND_TBL,
1394                                             cmd->rwq_ind_tbl_handle,
1395                                             file->ucontext);
1396                 if (!ind_tbl) {
1397                         ret = -EINVAL;
1398                         goto err_put;
1399                 }
1400
1401                 attr.rwq_ind_tbl = ind_tbl;
1402         }
1403
1404         if (cmd_sz > sizeof(*cmd) &&
1405             !ib_is_udata_cleared(ucore, sizeof(*cmd),
1406                                  cmd_sz - sizeof(*cmd))) {
1407                 ret = -EOPNOTSUPP;
1408                 goto err_put;
1409         }
1410
1411         if (ind_tbl && (cmd->max_recv_wr || cmd->max_recv_sge || cmd->is_srq)) {
1412                 ret = -EINVAL;
1413                 goto err_put;
1414         }
1415
1416         if (ind_tbl && !cmd->max_send_wr)
1417                 has_sq = false;
1418
1419         if (cmd->qp_type == IB_QPT_XRC_TGT) {
1420                 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->pd_handle,
1421                                           file->ucontext);
1422
1423                 if (IS_ERR(xrcd_uobj)) {
1424                         ret = -EINVAL;
1425                         goto err_put;
1426                 }
1427
1428                 xrcd = (struct ib_xrcd *)xrcd_uobj->object;
1429                 if (!xrcd) {
1430                         ret = -EINVAL;
1431                         goto err_put;
1432                 }
1433                 device = xrcd->device;
1434         } else {
1435                 if (cmd->qp_type == IB_QPT_XRC_INI) {
1436                         cmd->max_recv_wr = 0;
1437                         cmd->max_recv_sge = 0;
1438                 } else {
1439                         if (cmd->is_srq) {
1440                                 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd->srq_handle,
1441                                                         file->ucontext);
1442                                 if (!srq || srq->srq_type == IB_SRQT_XRC) {
1443                                         ret = -EINVAL;
1444                                         goto err_put;
1445                                 }
1446                         }
1447
1448                         if (!ind_tbl) {
1449                                 if (cmd->recv_cq_handle != cmd->send_cq_handle) {
1450                                         rcq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd->recv_cq_handle,
1451                                                                 file->ucontext);
1452                                         if (!rcq) {
1453                                                 ret = -EINVAL;
1454                                                 goto err_put;
1455                                         }
1456                                 }
1457                         }
1458                 }
1459
1460                 if (has_sq)
1461                         scq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd->send_cq_handle,
1462                                                 file->ucontext);
1463                 if (!ind_tbl)
1464                         rcq = rcq ?: scq;
1465                 pd  = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle, file->ucontext);
1466                 if (!pd || (!scq && has_sq)) {
1467                         ret = -EINVAL;
1468                         goto err_put;
1469                 }
1470
1471                 device = pd->device;
1472         }
1473
1474         attr.event_handler = ib_uverbs_qp_event_handler;
1475         attr.qp_context    = file;
1476         attr.send_cq       = scq;
1477         attr.recv_cq       = rcq;
1478         attr.srq           = srq;
1479         attr.xrcd          = xrcd;
1480         attr.sq_sig_type   = cmd->sq_sig_all ? IB_SIGNAL_ALL_WR :
1481                                               IB_SIGNAL_REQ_WR;
1482         attr.qp_type       = cmd->qp_type;
1483         attr.create_flags  = 0;
1484
1485         attr.cap.max_send_wr     = cmd->max_send_wr;
1486         attr.cap.max_recv_wr     = cmd->max_recv_wr;
1487         attr.cap.max_send_sge    = cmd->max_send_sge;
1488         attr.cap.max_recv_sge    = cmd->max_recv_sge;
1489         attr.cap.max_inline_data = cmd->max_inline_data;
1490
1491         obj->uevent.events_reported     = 0;
1492         INIT_LIST_HEAD(&obj->uevent.event_list);
1493         INIT_LIST_HEAD(&obj->mcast_list);
1494
1495         if (cmd_sz >= offsetof(typeof(*cmd), create_flags) +
1496                       sizeof(cmd->create_flags))
1497                 attr.create_flags = cmd->create_flags;
1498
1499         if (attr.create_flags & ~(IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK |
1500                                 IB_QP_CREATE_CROSS_CHANNEL |
1501                                 IB_QP_CREATE_MANAGED_SEND |
1502                                 IB_QP_CREATE_MANAGED_RECV |
1503                                 IB_QP_CREATE_SCATTER_FCS |
1504                                 IB_QP_CREATE_CVLAN_STRIPPING |
1505                                 IB_QP_CREATE_SOURCE_QPN |
1506                                 IB_QP_CREATE_PCI_WRITE_END_PADDING)) {
1507                 ret = -EINVAL;
1508                 goto err_put;
1509         }
1510
1511         if (attr.create_flags & IB_QP_CREATE_SOURCE_QPN) {
1512                 if (!capable(CAP_NET_RAW)) {
1513                         ret = -EPERM;
1514                         goto err_put;
1515                 }
1516
1517                 attr.source_qpn = cmd->source_qpn;
1518         }
1519
1520         buf = (void *)cmd + sizeof(*cmd);
1521         if (cmd_sz > sizeof(*cmd))
1522                 if (!(buf[0] == 0 && !memcmp(buf, buf + 1,
1523                                              cmd_sz - sizeof(*cmd) - 1))) {
1524                         ret = -EINVAL;
1525                         goto err_put;
1526                 }
1527
1528         if (cmd->qp_type == IB_QPT_XRC_TGT)
1529                 qp = ib_create_qp(pd, &attr);
1530         else
1531                 qp = _ib_create_qp(device, pd, &attr, uhw,
1532                                    &obj->uevent.uobject);
1533
1534         if (IS_ERR(qp)) {
1535                 ret = PTR_ERR(qp);
1536                 goto err_put;
1537         }
1538
1539         if (cmd->qp_type != IB_QPT_XRC_TGT) {
1540                 ret = ib_create_qp_security(qp, device);
1541                 if (ret)
1542                         goto err_cb;
1543
1544                 qp->real_qp       = qp;
1545                 qp->pd            = pd;
1546                 qp->send_cq       = attr.send_cq;
1547                 qp->recv_cq       = attr.recv_cq;
1548                 qp->srq           = attr.srq;
1549                 qp->rwq_ind_tbl   = ind_tbl;
1550                 qp->event_handler = attr.event_handler;
1551                 qp->qp_context    = attr.qp_context;
1552                 qp->qp_type       = attr.qp_type;
1553                 atomic_set(&qp->usecnt, 0);
1554                 atomic_inc(&pd->usecnt);
1555                 qp->port = 0;
1556                 if (attr.send_cq)
1557                         atomic_inc(&attr.send_cq->usecnt);
1558                 if (attr.recv_cq)
1559                         atomic_inc(&attr.recv_cq->usecnt);
1560                 if (attr.srq)
1561                         atomic_inc(&attr.srq->usecnt);
1562                 if (ind_tbl)
1563                         atomic_inc(&ind_tbl->usecnt);
1564         } else {
1565                 /* It is done in _ib_create_qp for other QP types */
1566                 qp->uobject = &obj->uevent.uobject;
1567         }
1568
1569         obj->uevent.uobject.object = qp;
1570
1571         memset(&resp, 0, sizeof resp);
1572         resp.base.qpn             = qp->qp_num;
1573         resp.base.qp_handle       = obj->uevent.uobject.id;
1574         resp.base.max_recv_sge    = attr.cap.max_recv_sge;
1575         resp.base.max_send_sge    = attr.cap.max_send_sge;
1576         resp.base.max_recv_wr     = attr.cap.max_recv_wr;
1577         resp.base.max_send_wr     = attr.cap.max_send_wr;
1578         resp.base.max_inline_data = attr.cap.max_inline_data;
1579
1580         resp.response_length = offsetof(typeof(resp), response_length) +
1581                                sizeof(resp.response_length);
1582
1583         ret = cb(file, &resp, ucore);
1584         if (ret)
1585                 goto err_cb;
1586
1587         if (xrcd) {
1588                 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object,
1589                                           uobject);
1590                 atomic_inc(&obj->uxrcd->refcnt);
1591                 uobj_put_read(xrcd_uobj);
1592         }
1593
1594         if (pd)
1595                 uobj_put_obj_read(pd);
1596         if (scq)
1597                 uobj_put_obj_read(scq);
1598         if (rcq && rcq != scq)
1599                 uobj_put_obj_read(rcq);
1600         if (srq)
1601                 uobj_put_obj_read(srq);
1602         if (ind_tbl)
1603                 uobj_put_obj_read(ind_tbl);
1604
1605         uobj_alloc_commit(&obj->uevent.uobject);
1606
1607         return 0;
1608 err_cb:
1609         ib_destroy_qp(qp);
1610
1611 err_put:
1612         if (!IS_ERR(xrcd_uobj))
1613                 uobj_put_read(xrcd_uobj);
1614         if (pd)
1615                 uobj_put_obj_read(pd);
1616         if (scq)
1617                 uobj_put_obj_read(scq);
1618         if (rcq && rcq != scq)
1619                 uobj_put_obj_read(rcq);
1620         if (srq)
1621                 uobj_put_obj_read(srq);
1622         if (ind_tbl)
1623                 uobj_put_obj_read(ind_tbl);
1624
1625         uobj_alloc_abort(&obj->uevent.uobject);
1626         return ret;
1627 }
1628
1629 static int ib_uverbs_create_qp_cb(struct ib_uverbs_file *file,
1630                                   struct ib_uverbs_ex_create_qp_resp *resp,
1631                                   struct ib_udata *ucore)
1632 {
1633         if (ib_copy_to_udata(ucore, &resp->base, sizeof(resp->base)))
1634                 return -EFAULT;
1635
1636         return 0;
1637 }
1638
1639 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1640                             struct ib_device *ib_dev,
1641                             const char __user *buf, int in_len,
1642                             int out_len)
1643 {
1644         struct ib_uverbs_create_qp      cmd;
1645         struct ib_uverbs_ex_create_qp   cmd_ex;
1646         struct ib_udata                 ucore;
1647         struct ib_udata                 uhw;
1648         ssize_t resp_size = sizeof(struct ib_uverbs_create_qp_resp);
1649         int                             err;
1650
1651         if (out_len < resp_size)
1652                 return -ENOSPC;
1653
1654         if (copy_from_user(&cmd, buf, sizeof(cmd)))
1655                 return -EFAULT;
1656
1657         ib_uverbs_init_udata(&ucore, buf, u64_to_user_ptr(cmd.response),
1658                    sizeof(cmd), resp_size);
1659         ib_uverbs_init_udata(&uhw, buf + sizeof(cmd),
1660                    u64_to_user_ptr(cmd.response) + resp_size,
1661                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
1662                    out_len - resp_size);
1663
1664         memset(&cmd_ex, 0, sizeof(cmd_ex));
1665         cmd_ex.user_handle = cmd.user_handle;
1666         cmd_ex.pd_handle = cmd.pd_handle;
1667         cmd_ex.send_cq_handle = cmd.send_cq_handle;
1668         cmd_ex.recv_cq_handle = cmd.recv_cq_handle;
1669         cmd_ex.srq_handle = cmd.srq_handle;
1670         cmd_ex.max_send_wr = cmd.max_send_wr;
1671         cmd_ex.max_recv_wr = cmd.max_recv_wr;
1672         cmd_ex.max_send_sge = cmd.max_send_sge;
1673         cmd_ex.max_recv_sge = cmd.max_recv_sge;
1674         cmd_ex.max_inline_data = cmd.max_inline_data;
1675         cmd_ex.sq_sig_all = cmd.sq_sig_all;
1676         cmd_ex.qp_type = cmd.qp_type;
1677         cmd_ex.is_srq = cmd.is_srq;
1678
1679         err = create_qp(file, &ucore, &uhw, &cmd_ex,
1680                         offsetof(typeof(cmd_ex), is_srq) +
1681                         sizeof(cmd.is_srq), ib_uverbs_create_qp_cb,
1682                         NULL);
1683
1684         if (err)
1685                 return err;
1686
1687         return in_len;
1688 }
1689
1690 static int ib_uverbs_ex_create_qp_cb(struct ib_uverbs_file *file,
1691                                      struct ib_uverbs_ex_create_qp_resp *resp,
1692                                      struct ib_udata *ucore)
1693 {
1694         if (ib_copy_to_udata(ucore, resp, resp->response_length))
1695                 return -EFAULT;
1696
1697         return 0;
1698 }
1699
1700 int ib_uverbs_ex_create_qp(struct ib_uverbs_file *file,
1701                            struct ib_device *ib_dev,
1702                            struct ib_udata *ucore,
1703                            struct ib_udata *uhw)
1704 {
1705         struct ib_uverbs_ex_create_qp_resp resp;
1706         struct ib_uverbs_ex_create_qp cmd = {0};
1707         int err;
1708
1709         if (ucore->inlen < (offsetof(typeof(cmd), comp_mask) +
1710                             sizeof(cmd.comp_mask)))
1711                 return -EINVAL;
1712
1713         err = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
1714         if (err)
1715                 return err;
1716
1717         if (cmd.comp_mask & ~IB_UVERBS_CREATE_QP_SUP_COMP_MASK)
1718                 return -EINVAL;
1719
1720         if (cmd.reserved)
1721                 return -EINVAL;
1722
1723         if (ucore->outlen < (offsetof(typeof(resp), response_length) +
1724                              sizeof(resp.response_length)))
1725                 return -ENOSPC;
1726
1727         err = create_qp(file, ucore, uhw, &cmd,
1728                         min(ucore->inlen, sizeof(cmd)),
1729                         ib_uverbs_ex_create_qp_cb, NULL);
1730
1731         if (err)
1732                 return err;
1733
1734         return 0;
1735 }
1736
1737 ssize_t ib_uverbs_open_qp(struct ib_uverbs_file *file,
1738                           struct ib_device *ib_dev,
1739                           const char __user *buf, int in_len, int out_len)
1740 {
1741         struct ib_uverbs_open_qp        cmd;
1742         struct ib_uverbs_create_qp_resp resp;
1743         struct ib_udata                 udata;
1744         struct ib_uqp_object           *obj;
1745         struct ib_xrcd                 *xrcd;
1746         struct ib_uobject              *uninitialized_var(xrcd_uobj);
1747         struct ib_qp                   *qp;
1748         struct ib_qp_open_attr          attr;
1749         int ret;
1750
1751         if (out_len < sizeof resp)
1752                 return -ENOSPC;
1753
1754         if (copy_from_user(&cmd, buf, sizeof cmd))
1755                 return -EFAULT;
1756
1757         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
1758                    u64_to_user_ptr(cmd.response) + sizeof(resp),
1759                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
1760                    out_len - sizeof(resp));
1761
1762         obj  = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP,
1763                                                   file->ucontext);
1764         if (IS_ERR(obj))
1765                 return PTR_ERR(obj);
1766
1767         xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd.pd_handle,
1768                                   file->ucontext);
1769         if (IS_ERR(xrcd_uobj)) {
1770                 ret = -EINVAL;
1771                 goto err_put;
1772         }
1773
1774         xrcd = (struct ib_xrcd *)xrcd_uobj->object;
1775         if (!xrcd) {
1776                 ret = -EINVAL;
1777                 goto err_xrcd;
1778         }
1779
1780         attr.event_handler = ib_uverbs_qp_event_handler;
1781         attr.qp_context    = file;
1782         attr.qp_num        = cmd.qpn;
1783         attr.qp_type       = cmd.qp_type;
1784
1785         obj->uevent.events_reported = 0;
1786         INIT_LIST_HEAD(&obj->uevent.event_list);
1787         INIT_LIST_HEAD(&obj->mcast_list);
1788
1789         qp = ib_open_qp(xrcd, &attr);
1790         if (IS_ERR(qp)) {
1791                 ret = PTR_ERR(qp);
1792                 goto err_xrcd;
1793         }
1794
1795         obj->uevent.uobject.object = qp;
1796         obj->uevent.uobject.user_handle = cmd.user_handle;
1797
1798         memset(&resp, 0, sizeof resp);
1799         resp.qpn       = qp->qp_num;
1800         resp.qp_handle = obj->uevent.uobject.id;
1801
1802         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
1803                 ret = -EFAULT;
1804                 goto err_destroy;
1805         }
1806
1807         obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
1808         atomic_inc(&obj->uxrcd->refcnt);
1809         qp->uobject = &obj->uevent.uobject;
1810         uobj_put_read(xrcd_uobj);
1811
1812
1813         uobj_alloc_commit(&obj->uevent.uobject);
1814
1815         return in_len;
1816
1817 err_destroy:
1818         ib_destroy_qp(qp);
1819 err_xrcd:
1820         uobj_put_read(xrcd_uobj);
1821 err_put:
1822         uobj_alloc_abort(&obj->uevent.uobject);
1823         return ret;
1824 }
1825
1826 static void copy_ah_attr_to_uverbs(struct ib_uverbs_qp_dest *uverb_attr,
1827                                    struct rdma_ah_attr *rdma_attr)
1828 {
1829         const struct ib_global_route   *grh;
1830
1831         uverb_attr->dlid              = rdma_ah_get_dlid(rdma_attr);
1832         uverb_attr->sl                = rdma_ah_get_sl(rdma_attr);
1833         uverb_attr->src_path_bits     = rdma_ah_get_path_bits(rdma_attr);
1834         uverb_attr->static_rate       = rdma_ah_get_static_rate(rdma_attr);
1835         uverb_attr->is_global         = !!(rdma_ah_get_ah_flags(rdma_attr) &
1836                                          IB_AH_GRH);
1837         if (uverb_attr->is_global) {
1838                 grh = rdma_ah_read_grh(rdma_attr);
1839                 memcpy(uverb_attr->dgid, grh->dgid.raw, 16);
1840                 uverb_attr->flow_label        = grh->flow_label;
1841                 uverb_attr->sgid_index        = grh->sgid_index;
1842                 uverb_attr->hop_limit         = grh->hop_limit;
1843                 uverb_attr->traffic_class     = grh->traffic_class;
1844         }
1845         uverb_attr->port_num          = rdma_ah_get_port_num(rdma_attr);
1846 }
1847
1848 ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
1849                            struct ib_device *ib_dev,
1850                            const char __user *buf, int in_len,
1851                            int out_len)
1852 {
1853         struct ib_uverbs_query_qp      cmd;
1854         struct ib_uverbs_query_qp_resp resp;
1855         struct ib_qp                   *qp;
1856         struct ib_qp_attr              *attr;
1857         struct ib_qp_init_attr         *init_attr;
1858         int                            ret;
1859
1860         if (copy_from_user(&cmd, buf, sizeof cmd))
1861                 return -EFAULT;
1862
1863         attr      = kmalloc(sizeof *attr, GFP_KERNEL);
1864         init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1865         if (!attr || !init_attr) {
1866                 ret = -ENOMEM;
1867                 goto out;
1868         }
1869
1870         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, file->ucontext);
1871         if (!qp) {
1872                 ret = -EINVAL;
1873                 goto out;
1874         }
1875
1876         ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1877
1878         uobj_put_obj_read(qp);
1879
1880         if (ret)
1881                 goto out;
1882
1883         memset(&resp, 0, sizeof resp);
1884
1885         resp.qp_state               = attr->qp_state;
1886         resp.cur_qp_state           = attr->cur_qp_state;
1887         resp.path_mtu               = attr->path_mtu;
1888         resp.path_mig_state         = attr->path_mig_state;
1889         resp.qkey                   = attr->qkey;
1890         resp.rq_psn                 = attr->rq_psn;
1891         resp.sq_psn                 = attr->sq_psn;
1892         resp.dest_qp_num            = attr->dest_qp_num;
1893         resp.qp_access_flags        = attr->qp_access_flags;
1894         resp.pkey_index             = attr->pkey_index;
1895         resp.alt_pkey_index         = attr->alt_pkey_index;
1896         resp.sq_draining            = attr->sq_draining;
1897         resp.max_rd_atomic          = attr->max_rd_atomic;
1898         resp.max_dest_rd_atomic     = attr->max_dest_rd_atomic;
1899         resp.min_rnr_timer          = attr->min_rnr_timer;
1900         resp.port_num               = attr->port_num;
1901         resp.timeout                = attr->timeout;
1902         resp.retry_cnt              = attr->retry_cnt;
1903         resp.rnr_retry              = attr->rnr_retry;
1904         resp.alt_port_num           = attr->alt_port_num;
1905         resp.alt_timeout            = attr->alt_timeout;
1906
1907         copy_ah_attr_to_uverbs(&resp.dest, &attr->ah_attr);
1908         copy_ah_attr_to_uverbs(&resp.alt_dest, &attr->alt_ah_attr);
1909
1910         resp.max_send_wr            = init_attr->cap.max_send_wr;
1911         resp.max_recv_wr            = init_attr->cap.max_recv_wr;
1912         resp.max_send_sge           = init_attr->cap.max_send_sge;
1913         resp.max_recv_sge           = init_attr->cap.max_recv_sge;
1914         resp.max_inline_data        = init_attr->cap.max_inline_data;
1915         resp.sq_sig_all             = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1916
1917         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
1918                 ret = -EFAULT;
1919
1920 out:
1921         kfree(attr);
1922         kfree(init_attr);
1923
1924         return ret ? ret : in_len;
1925 }
1926
1927 /* Remove ignored fields set in the attribute mask */
1928 static int modify_qp_mask(enum ib_qp_type qp_type, int mask)
1929 {
1930         switch (qp_type) {
1931         case IB_QPT_XRC_INI:
1932                 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER);
1933         case IB_QPT_XRC_TGT:
1934                 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT |
1935                                 IB_QP_RNR_RETRY);
1936         default:
1937                 return mask;
1938         }
1939 }
1940
1941 static void copy_ah_attr_from_uverbs(struct ib_device *dev,
1942                                      struct rdma_ah_attr *rdma_attr,
1943                                      struct ib_uverbs_qp_dest *uverb_attr)
1944 {
1945         rdma_attr->type = rdma_ah_find_type(dev, uverb_attr->port_num);
1946         if (uverb_attr->is_global) {
1947                 rdma_ah_set_grh(rdma_attr, NULL,
1948                                 uverb_attr->flow_label,
1949                                 uverb_attr->sgid_index,
1950                                 uverb_attr->hop_limit,
1951                                 uverb_attr->traffic_class);
1952                 rdma_ah_set_dgid_raw(rdma_attr, uverb_attr->dgid);
1953         } else {
1954                 rdma_ah_set_ah_flags(rdma_attr, 0);
1955         }
1956         rdma_ah_set_dlid(rdma_attr, uverb_attr->dlid);
1957         rdma_ah_set_sl(rdma_attr, uverb_attr->sl);
1958         rdma_ah_set_path_bits(rdma_attr, uverb_attr->src_path_bits);
1959         rdma_ah_set_static_rate(rdma_attr, uverb_attr->static_rate);
1960         rdma_ah_set_port_num(rdma_attr, uverb_attr->port_num);
1961         rdma_ah_set_make_grd(rdma_attr, false);
1962 }
1963
1964 static int modify_qp(struct ib_uverbs_file *file,
1965                      struct ib_uverbs_ex_modify_qp *cmd, struct ib_udata *udata)
1966 {
1967         struct ib_qp_attr *attr;
1968         struct ib_qp *qp;
1969         int ret;
1970
1971         attr = kmalloc(sizeof *attr, GFP_KERNEL);
1972         if (!attr)
1973                 return -ENOMEM;
1974
1975         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd->base.qp_handle, file->ucontext);
1976         if (!qp) {
1977                 ret = -EINVAL;
1978                 goto out;
1979         }
1980
1981         if ((cmd->base.attr_mask & IB_QP_PORT) &&
1982             !rdma_is_port_valid(qp->device, cmd->base.port_num)) {
1983                 ret = -EINVAL;
1984                 goto release_qp;
1985         }
1986
1987         if ((cmd->base.attr_mask & IB_QP_AV)) {
1988                 if (!rdma_is_port_valid(qp->device, cmd->base.dest.port_num)) {
1989                         ret = -EINVAL;
1990                         goto release_qp;
1991                 }
1992
1993                 if (cmd->base.attr_mask & IB_QP_STATE &&
1994                     cmd->base.qp_state == IB_QPS_RTR) {
1995                 /* We are in INIT->RTR TRANSITION (if we are not,
1996                  * this transition will be rejected in subsequent checks).
1997                  * In the INIT->RTR transition, we cannot have IB_QP_PORT set,
1998                  * but the IB_QP_STATE flag is required.
1999                  *
2000                  * Since kernel 3.14 (commit dbf727de7440), the uverbs driver,
2001                  * when IB_QP_AV is set, has required inclusion of a valid
2002                  * port number in the primary AV. (AVs are created and handled
2003                  * differently for infiniband and ethernet (RoCE) ports).
2004                  *
2005                  * Check the port number included in the primary AV against
2006                  * the port number in the qp struct, which was set (and saved)
2007                  * in the RST->INIT transition.
2008                  */
2009                         if (cmd->base.dest.port_num != qp->real_qp->port) {
2010                                 ret = -EINVAL;
2011                                 goto release_qp;
2012                         }
2013                 } else {
2014                 /* We are in SQD->SQD. (If we are not, this transition will
2015                  * be rejected later in the verbs layer checks).
2016                  * Check for both IB_QP_PORT and IB_QP_AV, these can be set
2017                  * together in the SQD->SQD transition.
2018                  *
2019                  * If only IP_QP_AV was set, add in IB_QP_PORT as well (the
2020                  * verbs layer driver does not track primary port changes
2021                  * resulting from path migration. Thus, in SQD, if the primary
2022                  * AV is modified, the primary port should also be modified).
2023                  *
2024                  * Note that in this transition, the IB_QP_STATE flag
2025                  * is not allowed.
2026                  */
2027                         if (((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT))
2028                              == (IB_QP_AV | IB_QP_PORT)) &&
2029                             cmd->base.port_num != cmd->base.dest.port_num) {
2030                                 ret = -EINVAL;
2031                                 goto release_qp;
2032                         }
2033                         if ((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT))
2034                             == IB_QP_AV) {
2035                                 cmd->base.attr_mask |= IB_QP_PORT;
2036                                 cmd->base.port_num = cmd->base.dest.port_num;
2037                         }
2038                 }
2039         }
2040
2041         if ((cmd->base.attr_mask & IB_QP_ALT_PATH) &&
2042             (!rdma_is_port_valid(qp->device, cmd->base.alt_port_num) ||
2043             !rdma_is_port_valid(qp->device, cmd->base.alt_dest.port_num) ||
2044             cmd->base.alt_port_num != cmd->base.alt_dest.port_num)) {
2045                 ret = -EINVAL;
2046                 goto release_qp;
2047         }
2048
2049         if ((cmd->base.attr_mask & IB_QP_CUR_STATE &&
2050             cmd->base.cur_qp_state > IB_QPS_ERR) ||
2051             cmd->base.qp_state > IB_QPS_ERR) {
2052                 ret = -EINVAL;
2053                 goto release_qp;
2054         }
2055
2056         attr->qp_state            = cmd->base.qp_state;
2057         attr->cur_qp_state        = cmd->base.cur_qp_state;
2058         attr->path_mtu            = cmd->base.path_mtu;
2059         attr->path_mig_state      = cmd->base.path_mig_state;
2060         attr->qkey                = cmd->base.qkey;
2061         attr->rq_psn              = cmd->base.rq_psn;
2062         attr->sq_psn              = cmd->base.sq_psn;
2063         attr->dest_qp_num         = cmd->base.dest_qp_num;
2064         attr->qp_access_flags     = cmd->base.qp_access_flags;
2065         attr->pkey_index          = cmd->base.pkey_index;
2066         attr->alt_pkey_index      = cmd->base.alt_pkey_index;
2067         attr->en_sqd_async_notify = cmd->base.en_sqd_async_notify;
2068         attr->max_rd_atomic       = cmd->base.max_rd_atomic;
2069         attr->max_dest_rd_atomic  = cmd->base.max_dest_rd_atomic;
2070         attr->min_rnr_timer       = cmd->base.min_rnr_timer;
2071         attr->port_num            = cmd->base.port_num;
2072         attr->timeout             = cmd->base.timeout;
2073         attr->retry_cnt           = cmd->base.retry_cnt;
2074         attr->rnr_retry           = cmd->base.rnr_retry;
2075         attr->alt_port_num        = cmd->base.alt_port_num;
2076         attr->alt_timeout         = cmd->base.alt_timeout;
2077         attr->rate_limit          = cmd->rate_limit;
2078
2079         if (cmd->base.attr_mask & IB_QP_AV)
2080                 copy_ah_attr_from_uverbs(qp->device, &attr->ah_attr,
2081                                          &cmd->base.dest);
2082
2083         if (cmd->base.attr_mask & IB_QP_ALT_PATH)
2084                 copy_ah_attr_from_uverbs(qp->device, &attr->alt_ah_attr,
2085                                          &cmd->base.alt_dest);
2086
2087         ret = ib_modify_qp_with_udata(qp, attr,
2088                                       modify_qp_mask(qp->qp_type,
2089                                                      cmd->base.attr_mask),
2090                                       udata);
2091
2092 release_qp:
2093         uobj_put_obj_read(qp);
2094 out:
2095         kfree(attr);
2096
2097         return ret;
2098 }
2099
2100 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
2101                             struct ib_device *ib_dev,
2102                             const char __user *buf, int in_len,
2103                             int out_len)
2104 {
2105         struct ib_uverbs_ex_modify_qp cmd = {};
2106         struct ib_udata udata;
2107         int ret;
2108
2109         if (copy_from_user(&cmd.base, buf, sizeof(cmd.base)))
2110                 return -EFAULT;
2111
2112         if (cmd.base.attr_mask &
2113             ~((IB_USER_LEGACY_LAST_QP_ATTR_MASK << 1) - 1))
2114                 return -EOPNOTSUPP;
2115
2116         ib_uverbs_init_udata(&udata, buf + sizeof(cmd.base), NULL,
2117                    in_len - sizeof(cmd.base) - sizeof(struct ib_uverbs_cmd_hdr),
2118                    out_len);
2119
2120         ret = modify_qp(file, &cmd, &udata);
2121         if (ret)
2122                 return ret;
2123
2124         return in_len;
2125 }
2126
2127 int ib_uverbs_ex_modify_qp(struct ib_uverbs_file *file,
2128                            struct ib_device *ib_dev,
2129                            struct ib_udata *ucore,
2130                            struct ib_udata *uhw)
2131 {
2132         struct ib_uverbs_ex_modify_qp cmd = {};
2133         int ret;
2134
2135         /*
2136          * Last bit is reserved for extending the attr_mask by
2137          * using another field.
2138          */
2139         BUILD_BUG_ON(IB_USER_LAST_QP_ATTR_MASK == (1 << 31));
2140
2141         if (ucore->inlen < sizeof(cmd.base))
2142                 return -EINVAL;
2143
2144         ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
2145         if (ret)
2146                 return ret;
2147
2148         if (cmd.base.attr_mask &
2149             ~((IB_USER_LAST_QP_ATTR_MASK << 1) - 1))
2150                 return -EOPNOTSUPP;
2151
2152         if (ucore->inlen > sizeof(cmd)) {
2153                 if (!ib_is_udata_cleared(ucore, sizeof(cmd),
2154                                          ucore->inlen - sizeof(cmd)))
2155                         return -EOPNOTSUPP;
2156         }
2157
2158         ret = modify_qp(file, &cmd, uhw);
2159
2160         return ret;
2161 }
2162
2163 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
2164                              struct ib_device *ib_dev,
2165                              const char __user *buf, int in_len,
2166                              int out_len)
2167 {
2168         struct ib_uverbs_destroy_qp      cmd;
2169         struct ib_uverbs_destroy_qp_resp resp;
2170         struct ib_uobject               *uobj;
2171         struct ib_uqp_object            *obj;
2172         int                              ret = -EINVAL;
2173
2174         if (copy_from_user(&cmd, buf, sizeof cmd))
2175                 return -EFAULT;
2176
2177         memset(&resp, 0, sizeof resp);
2178
2179         uobj  = uobj_get_write(UVERBS_OBJECT_QP, cmd.qp_handle,
2180                                file->ucontext);
2181         if (IS_ERR(uobj))
2182                 return PTR_ERR(uobj);
2183
2184         obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
2185         /*
2186          * Make sure we don't free the memory in remove_commit as we still
2187          * needs the uobject memory to create the response.
2188          */
2189         uverbs_uobject_get(uobj);
2190
2191         ret = uobj_remove_commit(uobj);
2192         if (ret) {
2193                 uverbs_uobject_put(uobj);
2194                 return ret;
2195         }
2196
2197         resp.events_reported = obj->uevent.events_reported;
2198         uverbs_uobject_put(uobj);
2199
2200         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
2201                 return -EFAULT;
2202
2203         return in_len;
2204 }
2205
2206 static void *alloc_wr(size_t wr_size, __u32 num_sge)
2207 {
2208         if (num_sge >= (U32_MAX - ALIGN(wr_size, sizeof (struct ib_sge))) /
2209                        sizeof (struct ib_sge))
2210                 return NULL;
2211
2212         return kmalloc(ALIGN(wr_size, sizeof (struct ib_sge)) +
2213                          num_sge * sizeof (struct ib_sge), GFP_KERNEL);
2214 }
2215
2216 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
2217                             struct ib_device *ib_dev,
2218                             const char __user *buf, int in_len,
2219                             int out_len)
2220 {
2221         struct ib_uverbs_post_send      cmd;
2222         struct ib_uverbs_post_send_resp resp;
2223         struct ib_uverbs_send_wr       *user_wr;
2224         struct ib_send_wr              *wr = NULL, *last, *next, *bad_wr;
2225         struct ib_qp                   *qp;
2226         int                             i, sg_ind;
2227         int                             is_ud;
2228         ssize_t                         ret = -EINVAL;
2229         size_t                          next_size;
2230
2231         if (copy_from_user(&cmd, buf, sizeof cmd))
2232                 return -EFAULT;
2233
2234         if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
2235             cmd.sge_count * sizeof (struct ib_uverbs_sge))
2236                 return -EINVAL;
2237
2238         if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
2239                 return -EINVAL;
2240
2241         user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
2242         if (!user_wr)
2243                 return -ENOMEM;
2244
2245         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, file->ucontext);
2246         if (!qp)
2247                 goto out;
2248
2249         is_ud = qp->qp_type == IB_QPT_UD;
2250         sg_ind = 0;
2251         last = NULL;
2252         for (i = 0; i < cmd.wr_count; ++i) {
2253                 if (copy_from_user(user_wr,
2254                                    buf + sizeof cmd + i * cmd.wqe_size,
2255                                    cmd.wqe_size)) {
2256                         ret = -EFAULT;
2257                         goto out_put;
2258                 }
2259
2260                 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
2261                         ret = -EINVAL;
2262                         goto out_put;
2263                 }
2264
2265                 if (is_ud) {
2266                         struct ib_ud_wr *ud;
2267
2268                         if (user_wr->opcode != IB_WR_SEND &&
2269                             user_wr->opcode != IB_WR_SEND_WITH_IMM) {
2270                                 ret = -EINVAL;
2271                                 goto out_put;
2272                         }
2273
2274                         next_size = sizeof(*ud);
2275                         ud = alloc_wr(next_size, user_wr->num_sge);
2276                         if (!ud) {
2277                                 ret = -ENOMEM;
2278                                 goto out_put;
2279                         }
2280
2281                         ud->ah = uobj_get_obj_read(ah, UVERBS_OBJECT_AH, user_wr->wr.ud.ah,
2282                                                    file->ucontext);
2283                         if (!ud->ah) {
2284                                 kfree(ud);
2285                                 ret = -EINVAL;
2286                                 goto out_put;
2287                         }
2288                         ud->remote_qpn = user_wr->wr.ud.remote_qpn;
2289                         ud->remote_qkey = user_wr->wr.ud.remote_qkey;
2290
2291                         next = &ud->wr;
2292                 } else if (user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM ||
2293                            user_wr->opcode == IB_WR_RDMA_WRITE ||
2294                            user_wr->opcode == IB_WR_RDMA_READ) {
2295                         struct ib_rdma_wr *rdma;
2296
2297                         next_size = sizeof(*rdma);
2298                         rdma = alloc_wr(next_size, user_wr->num_sge);
2299                         if (!rdma) {
2300                                 ret = -ENOMEM;
2301                                 goto out_put;
2302                         }
2303
2304                         rdma->remote_addr = user_wr->wr.rdma.remote_addr;
2305                         rdma->rkey = user_wr->wr.rdma.rkey;
2306
2307                         next = &rdma->wr;
2308                 } else if (user_wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP ||
2309                            user_wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) {
2310                         struct ib_atomic_wr *atomic;
2311
2312                         next_size = sizeof(*atomic);
2313                         atomic = alloc_wr(next_size, user_wr->num_sge);
2314                         if (!atomic) {
2315                                 ret = -ENOMEM;
2316                                 goto out_put;
2317                         }
2318
2319                         atomic->remote_addr = user_wr->wr.atomic.remote_addr;
2320                         atomic->compare_add = user_wr->wr.atomic.compare_add;
2321                         atomic->swap = user_wr->wr.atomic.swap;
2322                         atomic->rkey = user_wr->wr.atomic.rkey;
2323
2324                         next = &atomic->wr;
2325                 } else if (user_wr->opcode == IB_WR_SEND ||
2326                            user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2327                            user_wr->opcode == IB_WR_SEND_WITH_INV) {
2328                         next_size = sizeof(*next);
2329                         next = alloc_wr(next_size, user_wr->num_sge);
2330                         if (!next) {
2331                                 ret = -ENOMEM;
2332                                 goto out_put;
2333                         }
2334                 } else {
2335                         ret = -EINVAL;
2336                         goto out_put;
2337                 }
2338
2339                 if (user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2340                     user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) {
2341                         next->ex.imm_data =
2342                                         (__be32 __force) user_wr->ex.imm_data;
2343                 } else if (user_wr->opcode == IB_WR_SEND_WITH_INV) {
2344                         next->ex.invalidate_rkey = user_wr->ex.invalidate_rkey;
2345                 }
2346
2347                 if (!last)
2348                         wr = next;
2349                 else
2350                         last->next = next;
2351                 last = next;
2352
2353                 next->next       = NULL;
2354                 next->wr_id      = user_wr->wr_id;
2355                 next->num_sge    = user_wr->num_sge;
2356                 next->opcode     = user_wr->opcode;
2357                 next->send_flags = user_wr->send_flags;
2358
2359                 if (next->num_sge) {
2360                         next->sg_list = (void *) next +
2361                                 ALIGN(next_size, sizeof(struct ib_sge));
2362                         if (copy_from_user(next->sg_list,
2363                                            buf + sizeof cmd +
2364                                            cmd.wr_count * cmd.wqe_size +
2365                                            sg_ind * sizeof (struct ib_sge),
2366                                            next->num_sge * sizeof (struct ib_sge))) {
2367                                 ret = -EFAULT;
2368                                 goto out_put;
2369                         }
2370                         sg_ind += next->num_sge;
2371                 } else
2372                         next->sg_list = NULL;
2373         }
2374
2375         resp.bad_wr = 0;
2376         ret = qp->device->post_send(qp->real_qp, wr, &bad_wr);
2377         if (ret)
2378                 for (next = wr; next; next = next->next) {
2379                         ++resp.bad_wr;
2380                         if (next == bad_wr)
2381                                 break;
2382                 }
2383
2384         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
2385                 ret = -EFAULT;
2386
2387 out_put:
2388         uobj_put_obj_read(qp);
2389
2390         while (wr) {
2391                 if (is_ud && ud_wr(wr)->ah)
2392                         uobj_put_obj_read(ud_wr(wr)->ah);
2393                 next = wr->next;
2394                 kfree(wr);
2395                 wr = next;
2396         }
2397
2398 out:
2399         kfree(user_wr);
2400
2401         return ret ? ret : in_len;
2402 }
2403
2404 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
2405                                                     int in_len,
2406                                                     u32 wr_count,
2407                                                     u32 sge_count,
2408                                                     u32 wqe_size)
2409 {
2410         struct ib_uverbs_recv_wr *user_wr;
2411         struct ib_recv_wr        *wr = NULL, *last, *next;
2412         int                       sg_ind;
2413         int                       i;
2414         int                       ret;
2415
2416         if (in_len < wqe_size * wr_count +
2417             sge_count * sizeof (struct ib_uverbs_sge))
2418                 return ERR_PTR(-EINVAL);
2419
2420         if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
2421                 return ERR_PTR(-EINVAL);
2422
2423         user_wr = kmalloc(wqe_size, GFP_KERNEL);
2424         if (!user_wr)
2425                 return ERR_PTR(-ENOMEM);
2426
2427         sg_ind = 0;
2428         last = NULL;
2429         for (i = 0; i < wr_count; ++i) {
2430                 if (copy_from_user(user_wr, buf + i * wqe_size,
2431                                    wqe_size)) {
2432                         ret = -EFAULT;
2433                         goto err;
2434                 }
2435
2436                 if (user_wr->num_sge + sg_ind > sge_count) {
2437                         ret = -EINVAL;
2438                         goto err;
2439                 }
2440
2441                 if (user_wr->num_sge >=
2442                     (U32_MAX - ALIGN(sizeof *next, sizeof (struct ib_sge))) /
2443                     sizeof (struct ib_sge)) {
2444                         ret = -EINVAL;
2445                         goto err;
2446                 }
2447
2448                 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2449                                user_wr->num_sge * sizeof (struct ib_sge),
2450                                GFP_KERNEL);
2451                 if (!next) {
2452                         ret = -ENOMEM;
2453                         goto err;
2454                 }
2455
2456                 if (!last)
2457                         wr = next;
2458                 else
2459                         last->next = next;
2460                 last = next;
2461
2462                 next->next       = NULL;
2463                 next->wr_id      = user_wr->wr_id;
2464                 next->num_sge    = user_wr->num_sge;
2465
2466                 if (next->num_sge) {
2467                         next->sg_list = (void *) next +
2468                                 ALIGN(sizeof *next, sizeof (struct ib_sge));
2469                         if (copy_from_user(next->sg_list,
2470                                            buf + wr_count * wqe_size +
2471                                            sg_ind * sizeof (struct ib_sge),
2472                                            next->num_sge * sizeof (struct ib_sge))) {
2473                                 ret = -EFAULT;
2474                                 goto err;
2475                         }
2476                         sg_ind += next->num_sge;
2477                 } else
2478                         next->sg_list = NULL;
2479         }
2480
2481         kfree(user_wr);
2482         return wr;
2483
2484 err:
2485         kfree(user_wr);
2486
2487         while (wr) {
2488                 next = wr->next;
2489                 kfree(wr);
2490                 wr = next;
2491         }
2492
2493         return ERR_PTR(ret);
2494 }
2495
2496 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
2497                             struct ib_device *ib_dev,
2498                             const char __user *buf, int in_len,
2499                             int out_len)
2500 {
2501         struct ib_uverbs_post_recv      cmd;
2502         struct ib_uverbs_post_recv_resp resp;
2503         struct ib_recv_wr              *wr, *next, *bad_wr;
2504         struct ib_qp                   *qp;
2505         ssize_t                         ret = -EINVAL;
2506
2507         if (copy_from_user(&cmd, buf, sizeof cmd))
2508                 return -EFAULT;
2509
2510         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2511                                        in_len - sizeof cmd, cmd.wr_count,
2512                                        cmd.sge_count, cmd.wqe_size);
2513         if (IS_ERR(wr))
2514                 return PTR_ERR(wr);
2515
2516         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, file->ucontext);
2517         if (!qp)
2518                 goto out;
2519
2520         resp.bad_wr = 0;
2521         ret = qp->device->post_recv(qp->real_qp, wr, &bad_wr);
2522
2523         uobj_put_obj_read(qp);
2524         if (ret) {
2525                 for (next = wr; next; next = next->next) {
2526                         ++resp.bad_wr;
2527                         if (next == bad_wr)
2528                                 break;
2529                 }
2530         }
2531
2532         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
2533                 ret = -EFAULT;
2534
2535 out:
2536         while (wr) {
2537                 next = wr->next;
2538                 kfree(wr);
2539                 wr = next;
2540         }
2541
2542         return ret ? ret : in_len;
2543 }
2544
2545 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
2546                                 struct ib_device *ib_dev,
2547                                 const char __user *buf, int in_len,
2548                                 int out_len)
2549 {
2550         struct ib_uverbs_post_srq_recv      cmd;
2551         struct ib_uverbs_post_srq_recv_resp resp;
2552         struct ib_recv_wr                  *wr, *next, *bad_wr;
2553         struct ib_srq                      *srq;
2554         ssize_t                             ret = -EINVAL;
2555
2556         if (copy_from_user(&cmd, buf, sizeof cmd))
2557                 return -EFAULT;
2558
2559         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2560                                        in_len - sizeof cmd, cmd.wr_count,
2561                                        cmd.sge_count, cmd.wqe_size);
2562         if (IS_ERR(wr))
2563                 return PTR_ERR(wr);
2564
2565         srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, file->ucontext);
2566         if (!srq)
2567                 goto out;
2568
2569         resp.bad_wr = 0;
2570         ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
2571
2572         uobj_put_obj_read(srq);
2573
2574         if (ret)
2575                 for (next = wr; next; next = next->next) {
2576                         ++resp.bad_wr;
2577                         if (next == bad_wr)
2578                                 break;
2579                 }
2580
2581         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
2582                 ret = -EFAULT;
2583
2584 out:
2585         while (wr) {
2586                 next = wr->next;
2587                 kfree(wr);
2588                 wr = next;
2589         }
2590
2591         return ret ? ret : in_len;
2592 }
2593
2594 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
2595                             struct ib_device *ib_dev,
2596                             const char __user *buf, int in_len,
2597                             int out_len)
2598 {
2599         struct ib_uverbs_create_ah       cmd;
2600         struct ib_uverbs_create_ah_resp  resp;
2601         struct ib_uobject               *uobj;
2602         struct ib_pd                    *pd;
2603         struct ib_ah                    *ah;
2604         struct rdma_ah_attr             attr;
2605         int ret;
2606         struct ib_udata                   udata;
2607
2608         if (out_len < sizeof resp)
2609                 return -ENOSPC;
2610
2611         if (copy_from_user(&cmd, buf, sizeof cmd))
2612                 return -EFAULT;
2613
2614         if (!rdma_is_port_valid(ib_dev, cmd.attr.port_num))
2615                 return -EINVAL;
2616
2617         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
2618                    u64_to_user_ptr(cmd.response) + sizeof(resp),
2619                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
2620                    out_len - sizeof(resp));
2621
2622         uobj  = uobj_alloc(UVERBS_OBJECT_AH, file->ucontext);
2623         if (IS_ERR(uobj))
2624                 return PTR_ERR(uobj);
2625
2626         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, file->ucontext);
2627         if (!pd) {
2628                 ret = -EINVAL;
2629                 goto err;
2630         }
2631
2632         attr.type = rdma_ah_find_type(ib_dev, cmd.attr.port_num);
2633         rdma_ah_set_make_grd(&attr, false);
2634         rdma_ah_set_dlid(&attr, cmd.attr.dlid);
2635         rdma_ah_set_sl(&attr, cmd.attr.sl);
2636         rdma_ah_set_path_bits(&attr, cmd.attr.src_path_bits);
2637         rdma_ah_set_static_rate(&attr, cmd.attr.static_rate);
2638         rdma_ah_set_port_num(&attr, cmd.attr.port_num);
2639
2640         if (cmd.attr.is_global) {
2641                 rdma_ah_set_grh(&attr, NULL, cmd.attr.grh.flow_label,
2642                                 cmd.attr.grh.sgid_index,
2643                                 cmd.attr.grh.hop_limit,
2644                                 cmd.attr.grh.traffic_class);
2645                 rdma_ah_set_dgid_raw(&attr, cmd.attr.grh.dgid);
2646         } else {
2647                 rdma_ah_set_ah_flags(&attr, 0);
2648         }
2649
2650         ah = rdma_create_user_ah(pd, &attr, &udata);
2651         if (IS_ERR(ah)) {
2652                 ret = PTR_ERR(ah);
2653                 goto err_put;
2654         }
2655
2656         ah->uobject  = uobj;
2657         uobj->user_handle = cmd.user_handle;
2658         uobj->object = ah;
2659
2660         resp.ah_handle = uobj->id;
2661
2662         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
2663                 ret = -EFAULT;
2664                 goto err_copy;
2665         }
2666
2667         uobj_put_obj_read(pd);
2668         uobj_alloc_commit(uobj);
2669
2670         return in_len;
2671
2672 err_copy:
2673         rdma_destroy_ah(ah);
2674
2675 err_put:
2676         uobj_put_obj_read(pd);
2677
2678 err:
2679         uobj_alloc_abort(uobj);
2680         return ret;
2681 }
2682
2683 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
2684                              struct ib_device *ib_dev,
2685                              const char __user *buf, int in_len, int out_len)
2686 {
2687         struct ib_uverbs_destroy_ah cmd;
2688         struct ib_uobject          *uobj;
2689         int                         ret;
2690
2691         if (copy_from_user(&cmd, buf, sizeof cmd))
2692                 return -EFAULT;
2693
2694         uobj  = uobj_get_write(UVERBS_OBJECT_AH, cmd.ah_handle,
2695                                file->ucontext);
2696         if (IS_ERR(uobj))
2697                 return PTR_ERR(uobj);
2698
2699         ret = uobj_remove_commit(uobj);
2700         return ret ?: in_len;
2701 }
2702
2703 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
2704                                struct ib_device *ib_dev,
2705                                const char __user *buf, int in_len,
2706                                int out_len)
2707 {
2708         struct ib_uverbs_attach_mcast cmd;
2709         struct ib_qp                 *qp;
2710         struct ib_uqp_object         *obj;
2711         struct ib_uverbs_mcast_entry *mcast;
2712         int                           ret;
2713
2714         if (copy_from_user(&cmd, buf, sizeof cmd))
2715                 return -EFAULT;
2716
2717         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, file->ucontext);
2718         if (!qp)
2719                 return -EINVAL;
2720
2721         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2722
2723         mutex_lock(&obj->mcast_lock);
2724         list_for_each_entry(mcast, &obj->mcast_list, list)
2725                 if (cmd.mlid == mcast->lid &&
2726                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2727                         ret = 0;
2728                         goto out_put;
2729                 }
2730
2731         mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
2732         if (!mcast) {
2733                 ret = -ENOMEM;
2734                 goto out_put;
2735         }
2736
2737         mcast->lid = cmd.mlid;
2738         memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
2739
2740         ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
2741         if (!ret)
2742                 list_add_tail(&mcast->list, &obj->mcast_list);
2743         else
2744                 kfree(mcast);
2745
2746 out_put:
2747         mutex_unlock(&obj->mcast_lock);
2748         uobj_put_obj_read(qp);
2749
2750         return ret ? ret : in_len;
2751 }
2752
2753 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
2754                                struct ib_device *ib_dev,
2755                                const char __user *buf, int in_len,
2756                                int out_len)
2757 {
2758         struct ib_uverbs_detach_mcast cmd;
2759         struct ib_uqp_object         *obj;
2760         struct ib_qp                 *qp;
2761         struct ib_uverbs_mcast_entry *mcast;
2762         int                           ret = -EINVAL;
2763         bool                          found = false;
2764
2765         if (copy_from_user(&cmd, buf, sizeof cmd))
2766                 return -EFAULT;
2767
2768         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, file->ucontext);
2769         if (!qp)
2770                 return -EINVAL;
2771
2772         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2773         mutex_lock(&obj->mcast_lock);
2774
2775         list_for_each_entry(mcast, &obj->mcast_list, list)
2776                 if (cmd.mlid == mcast->lid &&
2777                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2778                         list_del(&mcast->list);
2779                         kfree(mcast);
2780                         found = true;
2781                         break;
2782                 }
2783
2784         if (!found) {
2785                 ret = -EINVAL;
2786                 goto out_put;
2787         }
2788
2789         ret = ib_detach_mcast(qp, (union ib_gid *)cmd.gid, cmd.mlid);
2790
2791 out_put:
2792         mutex_unlock(&obj->mcast_lock);
2793         uobj_put_obj_read(qp);
2794         return ret ? ret : in_len;
2795 }
2796
2797 struct ib_uflow_resources {
2798         size_t                  max;
2799         size_t                  num;
2800         size_t                  collection_num;
2801         size_t                  counters_num;
2802         struct ib_counters      **counters;
2803         struct ib_flow_action   **collection;
2804 };
2805
2806 static struct ib_uflow_resources *flow_resources_alloc(size_t num_specs)
2807 {
2808         struct ib_uflow_resources *resources;
2809
2810         resources = kzalloc(sizeof(*resources), GFP_KERNEL);
2811
2812         if (!resources)
2813                 goto err_res;
2814
2815         resources->counters =
2816                 kcalloc(num_specs, sizeof(*resources->counters), GFP_KERNEL);
2817
2818         if (!resources->counters)
2819                 goto err_cnt;
2820
2821         resources->collection =
2822                 kcalloc(num_specs, sizeof(*resources->collection), GFP_KERNEL);
2823
2824         if (!resources->collection)
2825                 goto err_collection;
2826
2827         resources->max = num_specs;
2828
2829         return resources;
2830
2831 err_collection:
2832         kfree(resources->counters);
2833 err_cnt:
2834         kfree(resources);
2835 err_res:
2836         return NULL;
2837 }
2838
2839 void ib_uverbs_flow_resources_free(struct ib_uflow_resources *uflow_res)
2840 {
2841         unsigned int i;
2842
2843         for (i = 0; i < uflow_res->collection_num; i++)
2844                 atomic_dec(&uflow_res->collection[i]->usecnt);
2845
2846         for (i = 0; i < uflow_res->counters_num; i++)
2847                 atomic_dec(&uflow_res->counters[i]->usecnt);
2848
2849         kfree(uflow_res->collection);
2850         kfree(uflow_res->counters);
2851         kfree(uflow_res);
2852 }
2853
2854 static void flow_resources_add(struct ib_uflow_resources *uflow_res,
2855                                enum ib_flow_spec_type type,
2856                                void *ibobj)
2857 {
2858         WARN_ON(uflow_res->num >= uflow_res->max);
2859
2860         switch (type) {
2861         case IB_FLOW_SPEC_ACTION_HANDLE:
2862                 atomic_inc(&((struct ib_flow_action *)ibobj)->usecnt);
2863                 uflow_res->collection[uflow_res->collection_num++] =
2864                         (struct ib_flow_action *)ibobj;
2865                 break;
2866         case IB_FLOW_SPEC_ACTION_COUNT:
2867                 atomic_inc(&((struct ib_counters *)ibobj)->usecnt);
2868                 uflow_res->counters[uflow_res->counters_num++] =
2869                         (struct ib_counters *)ibobj;
2870                 break;
2871         default:
2872                 WARN_ON(1);
2873         }
2874
2875         uflow_res->num++;
2876 }
2877
2878 static int kern_spec_to_ib_spec_action(struct ib_ucontext *ucontext,
2879                                        struct ib_uverbs_flow_spec *kern_spec,
2880                                        union ib_flow_spec *ib_spec,
2881                                        struct ib_uflow_resources *uflow_res)
2882 {
2883         ib_spec->type = kern_spec->type;
2884         switch (ib_spec->type) {
2885         case IB_FLOW_SPEC_ACTION_TAG:
2886                 if (kern_spec->flow_tag.size !=
2887                     sizeof(struct ib_uverbs_flow_spec_action_tag))
2888                         return -EINVAL;
2889
2890                 ib_spec->flow_tag.size = sizeof(struct ib_flow_spec_action_tag);
2891                 ib_spec->flow_tag.tag_id = kern_spec->flow_tag.tag_id;
2892                 break;
2893         case IB_FLOW_SPEC_ACTION_DROP:
2894                 if (kern_spec->drop.size !=
2895                     sizeof(struct ib_uverbs_flow_spec_action_drop))
2896                         return -EINVAL;
2897
2898                 ib_spec->drop.size = sizeof(struct ib_flow_spec_action_drop);
2899                 break;
2900         case IB_FLOW_SPEC_ACTION_HANDLE:
2901                 if (kern_spec->action.size !=
2902                     sizeof(struct ib_uverbs_flow_spec_action_handle))
2903                         return -EOPNOTSUPP;
2904                 ib_spec->action.act = uobj_get_obj_read(flow_action,
2905                                                         UVERBS_OBJECT_FLOW_ACTION,
2906                                                         kern_spec->action.handle,
2907                                                         ucontext);
2908                 if (!ib_spec->action.act)
2909                         return -EINVAL;
2910                 ib_spec->action.size =
2911                         sizeof(struct ib_flow_spec_action_handle);
2912                 flow_resources_add(uflow_res,
2913                                    IB_FLOW_SPEC_ACTION_HANDLE,
2914                                    ib_spec->action.act);
2915                 uobj_put_obj_read(ib_spec->action.act);
2916                 break;
2917         case IB_FLOW_SPEC_ACTION_COUNT:
2918                 if (kern_spec->flow_count.size !=
2919                         sizeof(struct ib_uverbs_flow_spec_action_count))
2920                         return -EINVAL;
2921                 ib_spec->flow_count.counters =
2922                         uobj_get_obj_read(counters,
2923                                           UVERBS_OBJECT_COUNTERS,
2924                                           kern_spec->flow_count.handle,
2925                                           ucontext);
2926                 if (!ib_spec->flow_count.counters)
2927                         return -EINVAL;
2928                 ib_spec->flow_count.size =
2929                                 sizeof(struct ib_flow_spec_action_count);
2930                 flow_resources_add(uflow_res,
2931                                    IB_FLOW_SPEC_ACTION_COUNT,
2932                                    ib_spec->flow_count.counters);
2933                 uobj_put_obj_read(ib_spec->flow_count.counters);
2934                 break;
2935         default:
2936                 return -EINVAL;
2937         }
2938         return 0;
2939 }
2940
2941 static size_t kern_spec_filter_sz(const struct ib_uverbs_flow_spec_hdr *spec)
2942 {
2943         /* Returns user space filter size, includes padding */
2944         return (spec->size - sizeof(struct ib_uverbs_flow_spec_hdr)) / 2;
2945 }
2946
2947 static ssize_t spec_filter_size(const void *kern_spec_filter, u16 kern_filter_size,
2948                                 u16 ib_real_filter_sz)
2949 {
2950         /*
2951          * User space filter structures must be 64 bit aligned, otherwise this
2952          * may pass, but we won't handle additional new attributes.
2953          */
2954
2955         if (kern_filter_size > ib_real_filter_sz) {
2956                 if (memchr_inv(kern_spec_filter +
2957                                ib_real_filter_sz, 0,
2958                                kern_filter_size - ib_real_filter_sz))
2959                         return -EINVAL;
2960                 return ib_real_filter_sz;
2961         }
2962         return kern_filter_size;
2963 }
2964
2965 int ib_uverbs_kern_spec_to_ib_spec_filter(enum ib_flow_spec_type type,
2966                                           const void *kern_spec_mask,
2967                                           const void *kern_spec_val,
2968                                           size_t kern_filter_sz,
2969                                           union ib_flow_spec *ib_spec)
2970 {
2971         ssize_t actual_filter_sz;
2972         ssize_t ib_filter_sz;
2973
2974         /* User flow spec size must be aligned to 4 bytes */
2975         if (kern_filter_sz != ALIGN(kern_filter_sz, 4))
2976                 return -EINVAL;
2977
2978         ib_spec->type = type;
2979
2980         if (ib_spec->type == (IB_FLOW_SPEC_INNER | IB_FLOW_SPEC_VXLAN_TUNNEL))
2981                 return -EINVAL;
2982
2983         switch (ib_spec->type & ~IB_FLOW_SPEC_INNER) {
2984         case IB_FLOW_SPEC_ETH:
2985                 ib_filter_sz = offsetof(struct ib_flow_eth_filter, real_sz);
2986                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2987                                                     kern_filter_sz,
2988                                                     ib_filter_sz);
2989                 if (actual_filter_sz <= 0)
2990                         return -EINVAL;
2991                 ib_spec->size = sizeof(struct ib_flow_spec_eth);
2992                 memcpy(&ib_spec->eth.val, kern_spec_val, actual_filter_sz);
2993                 memcpy(&ib_spec->eth.mask, kern_spec_mask, actual_filter_sz);
2994                 break;
2995         case IB_FLOW_SPEC_IPV4:
2996                 ib_filter_sz = offsetof(struct ib_flow_ipv4_filter, real_sz);
2997                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2998                                                     kern_filter_sz,
2999                                                     ib_filter_sz);
3000                 if (actual_filter_sz <= 0)
3001                         return -EINVAL;
3002                 ib_spec->size = sizeof(struct ib_flow_spec_ipv4);
3003                 memcpy(&ib_spec->ipv4.val, kern_spec_val, actual_filter_sz);
3004                 memcpy(&ib_spec->ipv4.mask, kern_spec_mask, actual_filter_sz);
3005                 break;
3006         case IB_FLOW_SPEC_IPV6:
3007                 ib_filter_sz = offsetof(struct ib_flow_ipv6_filter, real_sz);
3008                 actual_filter_sz = spec_filter_size(kern_spec_mask,
3009                                                     kern_filter_sz,
3010                                                     ib_filter_sz);
3011                 if (actual_filter_sz <= 0)
3012                         return -EINVAL;
3013                 ib_spec->size = sizeof(struct ib_flow_spec_ipv6);
3014                 memcpy(&ib_spec->ipv6.val, kern_spec_val, actual_filter_sz);
3015                 memcpy(&ib_spec->ipv6.mask, kern_spec_mask, actual_filter_sz);
3016
3017                 if ((ntohl(ib_spec->ipv6.mask.flow_label)) >= BIT(20) ||
3018                     (ntohl(ib_spec->ipv6.val.flow_label)) >= BIT(20))
3019                         return -EINVAL;
3020                 break;
3021         case IB_FLOW_SPEC_TCP:
3022         case IB_FLOW_SPEC_UDP:
3023                 ib_filter_sz = offsetof(struct ib_flow_tcp_udp_filter, real_sz);
3024                 actual_filter_sz = spec_filter_size(kern_spec_mask,
3025                                                     kern_filter_sz,
3026                                                     ib_filter_sz);
3027                 if (actual_filter_sz <= 0)
3028                         return -EINVAL;
3029                 ib_spec->size = sizeof(struct ib_flow_spec_tcp_udp);
3030                 memcpy(&ib_spec->tcp_udp.val, kern_spec_val, actual_filter_sz);
3031                 memcpy(&ib_spec->tcp_udp.mask, kern_spec_mask, actual_filter_sz);
3032                 break;
3033         case IB_FLOW_SPEC_VXLAN_TUNNEL:
3034                 ib_filter_sz = offsetof(struct ib_flow_tunnel_filter, real_sz);
3035                 actual_filter_sz = spec_filter_size(kern_spec_mask,
3036                                                     kern_filter_sz,
3037                                                     ib_filter_sz);
3038                 if (actual_filter_sz <= 0)
3039                         return -EINVAL;
3040                 ib_spec->tunnel.size = sizeof(struct ib_flow_spec_tunnel);
3041                 memcpy(&ib_spec->tunnel.val, kern_spec_val, actual_filter_sz);
3042                 memcpy(&ib_spec->tunnel.mask, kern_spec_mask, actual_filter_sz);
3043
3044                 if ((ntohl(ib_spec->tunnel.mask.tunnel_id)) >= BIT(24) ||
3045                     (ntohl(ib_spec->tunnel.val.tunnel_id)) >= BIT(24))
3046                         return -EINVAL;
3047                 break;
3048         case IB_FLOW_SPEC_ESP:
3049                 ib_filter_sz = offsetof(struct ib_flow_esp_filter, real_sz);
3050                 actual_filter_sz = spec_filter_size(kern_spec_mask,
3051                                                     kern_filter_sz,
3052                                                     ib_filter_sz);
3053                 if (actual_filter_sz <= 0)
3054                         return -EINVAL;
3055                 ib_spec->esp.size = sizeof(struct ib_flow_spec_esp);
3056                 memcpy(&ib_spec->esp.val, kern_spec_val, actual_filter_sz);
3057                 memcpy(&ib_spec->esp.mask, kern_spec_mask, actual_filter_sz);
3058                 break;
3059         case IB_FLOW_SPEC_GRE:
3060                 ib_filter_sz = offsetof(struct ib_flow_gre_filter, real_sz);
3061                 actual_filter_sz = spec_filter_size(kern_spec_mask,
3062                                                     kern_filter_sz,
3063                                                     ib_filter_sz);
3064                 if (actual_filter_sz <= 0)
3065                         return -EINVAL;
3066                 ib_spec->gre.size = sizeof(struct ib_flow_spec_gre);
3067                 memcpy(&ib_spec->gre.val, kern_spec_val, actual_filter_sz);
3068                 memcpy(&ib_spec->gre.mask, kern_spec_mask, actual_filter_sz);
3069                 break;
3070         case IB_FLOW_SPEC_MPLS:
3071                 ib_filter_sz = offsetof(struct ib_flow_mpls_filter, real_sz);
3072                 actual_filter_sz = spec_filter_size(kern_spec_mask,
3073                                                     kern_filter_sz,
3074                                                     ib_filter_sz);
3075                 if (actual_filter_sz <= 0)
3076                         return -EINVAL;
3077                 ib_spec->mpls.size = sizeof(struct ib_flow_spec_mpls);
3078                 memcpy(&ib_spec->mpls.val, kern_spec_val, actual_filter_sz);
3079                 memcpy(&ib_spec->mpls.mask, kern_spec_mask, actual_filter_sz);
3080                 break;
3081         default:
3082                 return -EINVAL;
3083         }
3084         return 0;
3085 }
3086
3087 static int kern_spec_to_ib_spec_filter(struct ib_uverbs_flow_spec *kern_spec,
3088                                        union ib_flow_spec *ib_spec)
3089 {
3090         ssize_t kern_filter_sz;
3091         void *kern_spec_mask;
3092         void *kern_spec_val;
3093
3094         if (kern_spec->reserved)
3095                 return -EINVAL;
3096
3097         kern_filter_sz = kern_spec_filter_sz(&kern_spec->hdr);
3098
3099         kern_spec_val = (void *)kern_spec +
3100                 sizeof(struct ib_uverbs_flow_spec_hdr);
3101         kern_spec_mask = kern_spec_val + kern_filter_sz;
3102
3103         return ib_uverbs_kern_spec_to_ib_spec_filter(kern_spec->type,
3104                                                      kern_spec_mask,
3105                                                      kern_spec_val,
3106                                                      kern_filter_sz, ib_spec);
3107 }
3108
3109 static int kern_spec_to_ib_spec(struct ib_ucontext *ucontext,
3110                                 struct ib_uverbs_flow_spec *kern_spec,
3111                                 union ib_flow_spec *ib_spec,
3112                                 struct ib_uflow_resources *uflow_res)
3113 {
3114         if (kern_spec->reserved)
3115                 return -EINVAL;
3116
3117         if (kern_spec->type >= IB_FLOW_SPEC_ACTION_TAG)
3118                 return kern_spec_to_ib_spec_action(ucontext, kern_spec, ib_spec,
3119                                                    uflow_res);
3120         else
3121                 return kern_spec_to_ib_spec_filter(kern_spec, ib_spec);
3122 }
3123
3124 int ib_uverbs_ex_create_wq(struct ib_uverbs_file *file,
3125                            struct ib_device *ib_dev,
3126                            struct ib_udata *ucore,
3127                            struct ib_udata *uhw)
3128 {
3129         struct ib_uverbs_ex_create_wq     cmd = {};
3130         struct ib_uverbs_ex_create_wq_resp resp = {};
3131         struct ib_uwq_object           *obj;
3132         int err = 0;
3133         struct ib_cq *cq;
3134         struct ib_pd *pd;
3135         struct ib_wq *wq;
3136         struct ib_wq_init_attr wq_init_attr = {};
3137         size_t required_cmd_sz;
3138         size_t required_resp_len;
3139
3140         required_cmd_sz = offsetof(typeof(cmd), max_sge) + sizeof(cmd.max_sge);
3141         required_resp_len = offsetof(typeof(resp), wqn) + sizeof(resp.wqn);
3142
3143         if (ucore->inlen < required_cmd_sz)
3144                 return -EINVAL;
3145
3146         if (ucore->outlen < required_resp_len)
3147                 return -ENOSPC;
3148
3149         if (ucore->inlen > sizeof(cmd) &&
3150             !ib_is_udata_cleared(ucore, sizeof(cmd),
3151                                  ucore->inlen - sizeof(cmd)))
3152                 return -EOPNOTSUPP;
3153
3154         err = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
3155         if (err)
3156                 return err;
3157
3158         if (cmd.comp_mask)
3159                 return -EOPNOTSUPP;
3160
3161         obj  = (struct ib_uwq_object *)uobj_alloc(UVERBS_OBJECT_WQ,
3162                                                   file->ucontext);
3163         if (IS_ERR(obj))
3164                 return PTR_ERR(obj);
3165
3166         pd  = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, file->ucontext);
3167         if (!pd) {
3168                 err = -EINVAL;
3169                 goto err_uobj;
3170         }
3171
3172         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, file->ucontext);
3173         if (!cq) {
3174                 err = -EINVAL;
3175                 goto err_put_pd;
3176         }
3177
3178         wq_init_attr.cq = cq;
3179         wq_init_attr.max_sge = cmd.max_sge;
3180         wq_init_attr.max_wr = cmd.max_wr;
3181         wq_init_attr.wq_context = file;
3182         wq_init_attr.wq_type = cmd.wq_type;
3183         wq_init_attr.event_handler = ib_uverbs_wq_event_handler;
3184         if (ucore->inlen >= (offsetof(typeof(cmd), create_flags) +
3185                              sizeof(cmd.create_flags)))
3186                 wq_init_attr.create_flags = cmd.create_flags;
3187         obj->uevent.events_reported = 0;
3188         INIT_LIST_HEAD(&obj->uevent.event_list);
3189
3190         if (!pd->device->create_wq) {
3191                 err = -EOPNOTSUPP;
3192                 goto err_put_cq;
3193         }
3194         wq = pd->device->create_wq(pd, &wq_init_attr, uhw);
3195         if (IS_ERR(wq)) {
3196                 err = PTR_ERR(wq);
3197                 goto err_put_cq;
3198         }
3199
3200         wq->uobject = &obj->uevent.uobject;
3201         obj->uevent.uobject.object = wq;
3202         wq->wq_type = wq_init_attr.wq_type;
3203         wq->cq = cq;
3204         wq->pd = pd;
3205         wq->device = pd->device;
3206         wq->wq_context = wq_init_attr.wq_context;
3207         atomic_set(&wq->usecnt, 0);
3208         atomic_inc(&pd->usecnt);
3209         atomic_inc(&cq->usecnt);
3210         wq->uobject = &obj->uevent.uobject;
3211         obj->uevent.uobject.object = wq;
3212
3213         memset(&resp, 0, sizeof(resp));
3214         resp.wq_handle = obj->uevent.uobject.id;
3215         resp.max_sge = wq_init_attr.max_sge;
3216         resp.max_wr = wq_init_attr.max_wr;
3217         resp.wqn = wq->wq_num;
3218         resp.response_length = required_resp_len;
3219         err = ib_copy_to_udata(ucore,
3220                                &resp, resp.response_length);
3221         if (err)
3222                 goto err_copy;
3223
3224         uobj_put_obj_read(pd);
3225         uobj_put_obj_read(cq);
3226         uobj_alloc_commit(&obj->uevent.uobject);
3227         return 0;
3228
3229 err_copy:
3230         ib_destroy_wq(wq);
3231 err_put_cq:
3232         uobj_put_obj_read(cq);
3233 err_put_pd:
3234         uobj_put_obj_read(pd);
3235 err_uobj:
3236         uobj_alloc_abort(&obj->uevent.uobject);
3237
3238         return err;
3239 }
3240
3241 int ib_uverbs_ex_destroy_wq(struct ib_uverbs_file *file,
3242                             struct ib_device *ib_dev,
3243                             struct ib_udata *ucore,
3244                             struct ib_udata *uhw)
3245 {
3246         struct ib_uverbs_ex_destroy_wq  cmd = {};
3247         struct ib_uverbs_ex_destroy_wq_resp     resp = {};
3248         struct ib_uobject               *uobj;
3249         struct ib_uwq_object            *obj;
3250         size_t required_cmd_sz;
3251         size_t required_resp_len;
3252         int                             ret;
3253
3254         required_cmd_sz = offsetof(typeof(cmd), wq_handle) + sizeof(cmd.wq_handle);
3255         required_resp_len = offsetof(typeof(resp), reserved) + sizeof(resp.reserved);
3256
3257         if (ucore->inlen < required_cmd_sz)
3258                 return -EINVAL;
3259
3260         if (ucore->outlen < required_resp_len)
3261                 return -ENOSPC;
3262
3263         if (ucore->inlen > sizeof(cmd) &&
3264             !ib_is_udata_cleared(ucore, sizeof(cmd),
3265                                  ucore->inlen - sizeof(cmd)))
3266                 return -EOPNOTSUPP;
3267
3268         ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
3269         if (ret)
3270                 return ret;
3271
3272         if (cmd.comp_mask)
3273                 return -EOPNOTSUPP;
3274
3275         resp.response_length = required_resp_len;
3276         uobj  = uobj_get_write(UVERBS_OBJECT_WQ, cmd.wq_handle,
3277                                file->ucontext);
3278         if (IS_ERR(uobj))
3279                 return PTR_ERR(uobj);
3280
3281         obj = container_of(uobj, struct ib_uwq_object, uevent.uobject);
3282         /*
3283          * Make sure we don't free the memory in remove_commit as we still
3284          * needs the uobject memory to create the response.
3285          */
3286         uverbs_uobject_get(uobj);
3287
3288         ret = uobj_remove_commit(uobj);
3289         resp.events_reported = obj->uevent.events_reported;
3290         uverbs_uobject_put(uobj);
3291         if (ret)
3292                 return ret;
3293
3294         return ib_copy_to_udata(ucore, &resp, resp.response_length);
3295 }
3296
3297 int ib_uverbs_ex_modify_wq(struct ib_uverbs_file *file,
3298                            struct ib_device *ib_dev,
3299                            struct ib_udata *ucore,
3300                            struct ib_udata *uhw)
3301 {
3302         struct ib_uverbs_ex_modify_wq cmd = {};
3303         struct ib_wq *wq;
3304         struct ib_wq_attr wq_attr = {};
3305         size_t required_cmd_sz;
3306         int ret;
3307
3308         required_cmd_sz = offsetof(typeof(cmd), curr_wq_state) + sizeof(cmd.curr_wq_state);
3309         if (ucore->inlen < required_cmd_sz)
3310                 return -EINVAL;
3311
3312         if (ucore->inlen > sizeof(cmd) &&
3313             !ib_is_udata_cleared(ucore, sizeof(cmd),
3314                                  ucore->inlen - sizeof(cmd)))
3315                 return -EOPNOTSUPP;
3316
3317         ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
3318         if (ret)
3319                 return ret;
3320
3321         if (!cmd.attr_mask)
3322                 return -EINVAL;
3323
3324         if (cmd.attr_mask > (IB_WQ_STATE | IB_WQ_CUR_STATE | IB_WQ_FLAGS))
3325                 return -EINVAL;
3326
3327         wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ, cmd.wq_handle, file->ucontext);
3328         if (!wq)
3329                 return -EINVAL;
3330
3331         wq_attr.curr_wq_state = cmd.curr_wq_state;
3332         wq_attr.wq_state = cmd.wq_state;
3333         if (cmd.attr_mask & IB_WQ_FLAGS) {
3334                 wq_attr.flags = cmd.flags;
3335                 wq_attr.flags_mask = cmd.flags_mask;
3336         }
3337         if (!wq->device->modify_wq) {
3338                 ret = -EOPNOTSUPP;
3339                 goto out;
3340         }
3341         ret = wq->device->modify_wq(wq, &wq_attr, cmd.attr_mask, uhw);
3342 out:
3343         uobj_put_obj_read(wq);
3344         return ret;
3345 }
3346
3347 int ib_uverbs_ex_create_rwq_ind_table(struct ib_uverbs_file *file,
3348                                       struct ib_device *ib_dev,
3349                                       struct ib_udata *ucore,
3350                                       struct ib_udata *uhw)
3351 {
3352         struct ib_uverbs_ex_create_rwq_ind_table          cmd = {};
3353         struct ib_uverbs_ex_create_rwq_ind_table_resp  resp = {};
3354         struct ib_uobject                 *uobj;
3355         int err = 0;
3356         struct ib_rwq_ind_table_init_attr init_attr = {};
3357         struct ib_rwq_ind_table *rwq_ind_tbl;
3358         struct ib_wq    **wqs = NULL;
3359         u32 *wqs_handles = NULL;
3360         struct ib_wq    *wq = NULL;
3361         int i, j, num_read_wqs;
3362         u32 num_wq_handles;
3363         u32 expected_in_size;
3364         size_t required_cmd_sz_header;
3365         size_t required_resp_len;
3366
3367         required_cmd_sz_header = offsetof(typeof(cmd), log_ind_tbl_size) + sizeof(cmd.log_ind_tbl_size);
3368         required_resp_len = offsetof(typeof(resp), ind_tbl_num) + sizeof(resp.ind_tbl_num);
3369
3370         if (ucore->inlen < required_cmd_sz_header)
3371                 return -EINVAL;
3372
3373         if (ucore->outlen < required_resp_len)
3374                 return -ENOSPC;
3375
3376         err = ib_copy_from_udata(&cmd, ucore, required_cmd_sz_header);
3377         if (err)
3378                 return err;
3379
3380         ucore->inbuf += required_cmd_sz_header;
3381         ucore->inlen -= required_cmd_sz_header;
3382
3383         if (cmd.comp_mask)
3384                 return -EOPNOTSUPP;
3385
3386         if (cmd.log_ind_tbl_size > IB_USER_VERBS_MAX_LOG_IND_TBL_SIZE)
3387                 return -EINVAL;
3388
3389         num_wq_handles = 1 << cmd.log_ind_tbl_size;
3390         expected_in_size = num_wq_handles * sizeof(__u32);
3391         if (num_wq_handles == 1)
3392                 /* input size for wq handles is u64 aligned */
3393                 expected_in_size += sizeof(__u32);
3394
3395         if (ucore->inlen < expected_in_size)
3396                 return -EINVAL;
3397
3398         if (ucore->inlen > expected_in_size &&
3399             !ib_is_udata_cleared(ucore, expected_in_size,
3400                                  ucore->inlen - expected_in_size))
3401                 return -EOPNOTSUPP;
3402
3403         wqs_handles = kcalloc(num_wq_handles, sizeof(*wqs_handles),
3404                               GFP_KERNEL);
3405         if (!wqs_handles)
3406                 return -ENOMEM;
3407
3408         err = ib_copy_from_udata(wqs_handles, ucore,
3409                                  num_wq_handles * sizeof(__u32));
3410         if (err)
3411                 goto err_free;
3412
3413         wqs = kcalloc(num_wq_handles, sizeof(*wqs), GFP_KERNEL);
3414         if (!wqs) {
3415                 err = -ENOMEM;
3416                 goto  err_free;
3417         }
3418
3419         for (num_read_wqs = 0; num_read_wqs < num_wq_handles;
3420                         num_read_wqs++) {
3421                 wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ, wqs_handles[num_read_wqs],
3422                                        file->ucontext);
3423                 if (!wq) {
3424                         err = -EINVAL;
3425                         goto put_wqs;
3426                 }
3427
3428                 wqs[num_read_wqs] = wq;
3429         }
3430
3431         uobj  = uobj_alloc(UVERBS_OBJECT_RWQ_IND_TBL, file->ucontext);
3432         if (IS_ERR(uobj)) {
3433                 err = PTR_ERR(uobj);
3434                 goto put_wqs;
3435         }
3436
3437         init_attr.log_ind_tbl_size = cmd.log_ind_tbl_size;
3438         init_attr.ind_tbl = wqs;
3439
3440         if (!ib_dev->create_rwq_ind_table) {
3441                 err = -EOPNOTSUPP;
3442                 goto err_uobj;
3443         }
3444         rwq_ind_tbl = ib_dev->create_rwq_ind_table(ib_dev, &init_attr, uhw);
3445
3446         if (IS_ERR(rwq_ind_tbl)) {
3447                 err = PTR_ERR(rwq_ind_tbl);
3448                 goto err_uobj;
3449         }
3450
3451         rwq_ind_tbl->ind_tbl = wqs;
3452         rwq_ind_tbl->log_ind_tbl_size = init_attr.log_ind_tbl_size;
3453         rwq_ind_tbl->uobject = uobj;
3454         uobj->object = rwq_ind_tbl;
3455         rwq_ind_tbl->device = ib_dev;
3456         atomic_set(&rwq_ind_tbl->usecnt, 0);
3457
3458         for (i = 0; i < num_wq_handles; i++)
3459                 atomic_inc(&wqs[i]->usecnt);
3460
3461         resp.ind_tbl_handle = uobj->id;
3462         resp.ind_tbl_num = rwq_ind_tbl->ind_tbl_num;
3463         resp.response_length = required_resp_len;
3464
3465         err = ib_copy_to_udata(ucore,
3466                                &resp, resp.response_length);
3467         if (err)
3468                 goto err_copy;
3469
3470         kfree(wqs_handles);
3471
3472         for (j = 0; j < num_read_wqs; j++)
3473                 uobj_put_obj_read(wqs[j]);
3474
3475         uobj_alloc_commit(uobj);
3476         return 0;
3477
3478 err_copy:
3479         ib_destroy_rwq_ind_table(rwq_ind_tbl);
3480 err_uobj:
3481         uobj_alloc_abort(uobj);
3482 put_wqs:
3483         for (j = 0; j < num_read_wqs; j++)
3484                 uobj_put_obj_read(wqs[j]);
3485 err_free:
3486         kfree(wqs_handles);
3487         kfree(wqs);
3488         return err;
3489 }
3490
3491 int ib_uverbs_ex_destroy_rwq_ind_table(struct ib_uverbs_file *file,
3492                                        struct ib_device *ib_dev,
3493                                        struct ib_udata *ucore,
3494                                        struct ib_udata *uhw)
3495 {
3496         struct ib_uverbs_ex_destroy_rwq_ind_table       cmd = {};
3497         struct ib_uobject               *uobj;
3498         int                     ret;
3499         size_t required_cmd_sz;
3500
3501         required_cmd_sz = offsetof(typeof(cmd), ind_tbl_handle) + sizeof(cmd.ind_tbl_handle);
3502
3503         if (ucore->inlen < required_cmd_sz)
3504                 return -EINVAL;
3505
3506         if (ucore->inlen > sizeof(cmd) &&
3507             !ib_is_udata_cleared(ucore, sizeof(cmd),
3508                                  ucore->inlen - sizeof(cmd)))
3509                 return -EOPNOTSUPP;
3510
3511         ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
3512         if (ret)
3513                 return ret;
3514
3515         if (cmd.comp_mask)
3516                 return -EOPNOTSUPP;
3517
3518         uobj  = uobj_get_write(UVERBS_OBJECT_RWQ_IND_TBL, cmd.ind_tbl_handle,
3519                                file->ucontext);
3520         if (IS_ERR(uobj))
3521                 return PTR_ERR(uobj);
3522
3523         return uobj_remove_commit(uobj);
3524 }
3525
3526 int ib_uverbs_ex_create_flow(struct ib_uverbs_file *file,
3527                              struct ib_device *ib_dev,
3528                              struct ib_udata *ucore,
3529                              struct ib_udata *uhw)
3530 {
3531         struct ib_uverbs_create_flow      cmd;
3532         struct ib_uverbs_create_flow_resp resp;
3533         struct ib_uobject                 *uobj;
3534         struct ib_uflow_object            *uflow;
3535         struct ib_flow                    *flow_id;
3536         struct ib_uverbs_flow_attr        *kern_flow_attr;
3537         struct ib_flow_attr               *flow_attr;
3538         struct ib_qp                      *qp;
3539         struct ib_uflow_resources         *uflow_res;
3540         struct ib_uverbs_flow_spec_hdr    *kern_spec;
3541         int err = 0;
3542         void *ib_spec;
3543         int i;
3544
3545         if (ucore->inlen < sizeof(cmd))
3546                 return -EINVAL;
3547
3548         if (ucore->outlen < sizeof(resp))
3549                 return -ENOSPC;
3550
3551         err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3552         if (err)
3553                 return err;
3554
3555         ucore->inbuf += sizeof(cmd);
3556         ucore->inlen -= sizeof(cmd);
3557
3558         if (cmd.comp_mask)
3559                 return -EINVAL;
3560
3561         if (!capable(CAP_NET_RAW))
3562                 return -EPERM;
3563
3564         if (cmd.flow_attr.flags >= IB_FLOW_ATTR_FLAGS_RESERVED)
3565                 return -EINVAL;
3566
3567         if ((cmd.flow_attr.flags & IB_FLOW_ATTR_FLAGS_DONT_TRAP) &&
3568             ((cmd.flow_attr.type == IB_FLOW_ATTR_ALL_DEFAULT) ||
3569              (cmd.flow_attr.type == IB_FLOW_ATTR_MC_DEFAULT)))
3570                 return -EINVAL;
3571
3572         if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS)
3573                 return -EINVAL;
3574
3575         if (cmd.flow_attr.size > ucore->inlen ||
3576             cmd.flow_attr.size >
3577             (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec)))
3578                 return -EINVAL;
3579
3580         if (cmd.flow_attr.reserved[0] ||
3581             cmd.flow_attr.reserved[1])
3582                 return -EINVAL;
3583
3584         if (cmd.flow_attr.num_of_specs) {
3585                 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size,
3586                                          GFP_KERNEL);
3587                 if (!kern_flow_attr)
3588                         return -ENOMEM;
3589
3590                 *kern_flow_attr = cmd.flow_attr;
3591                 err = ib_copy_from_udata(&kern_flow_attr->flow_specs, ucore,
3592                                          cmd.flow_attr.size);
3593                 if (err)
3594                         goto err_free_attr;
3595         } else {
3596                 kern_flow_attr = &cmd.flow_attr;
3597         }
3598
3599         uobj  = uobj_alloc(UVERBS_OBJECT_FLOW, file->ucontext);
3600         if (IS_ERR(uobj)) {
3601                 err = PTR_ERR(uobj);
3602                 goto err_free_attr;
3603         }
3604
3605         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, file->ucontext);
3606         if (!qp) {
3607                 err = -EINVAL;
3608                 goto err_uobj;
3609         }
3610
3611         if (qp->qp_type != IB_QPT_UD && qp->qp_type != IB_QPT_RAW_PACKET) {
3612                 err = -EINVAL;
3613                 goto err_put;
3614         }
3615
3616         flow_attr = kzalloc(struct_size(flow_attr, flows,
3617                                 cmd.flow_attr.num_of_specs), GFP_KERNEL);
3618         if (!flow_attr) {
3619                 err = -ENOMEM;
3620                 goto err_put;
3621         }
3622         uflow_res = flow_resources_alloc(cmd.flow_attr.num_of_specs);
3623         if (!uflow_res) {
3624                 err = -ENOMEM;
3625                 goto err_free_flow_attr;
3626         }
3627
3628         flow_attr->type = kern_flow_attr->type;
3629         flow_attr->priority = kern_flow_attr->priority;
3630         flow_attr->num_of_specs = kern_flow_attr->num_of_specs;
3631         flow_attr->port = kern_flow_attr->port;
3632         flow_attr->flags = kern_flow_attr->flags;
3633         flow_attr->size = sizeof(*flow_attr);
3634
3635         kern_spec = kern_flow_attr->flow_specs;
3636         ib_spec = flow_attr + 1;
3637         for (i = 0; i < flow_attr->num_of_specs &&
3638                         cmd.flow_attr.size >= sizeof(*kern_spec) &&
3639                         cmd.flow_attr.size >= kern_spec->size;
3640              i++) {
3641                 err = kern_spec_to_ib_spec(
3642                                 file->ucontext, (struct ib_uverbs_flow_spec *)kern_spec,
3643                                 ib_spec, uflow_res);
3644                 if (err)
3645                         goto err_free;
3646
3647                 flow_attr->size +=
3648                         ((union ib_flow_spec *) ib_spec)->size;
3649                 cmd.flow_attr.size -= kern_spec->size;
3650                 kern_spec = ((void *)kern_spec) + kern_spec->size;
3651                 ib_spec += ((union ib_flow_spec *) ib_spec)->size;
3652         }
3653         if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) {
3654                 pr_warn("create flow failed, flow %d: %d bytes left from uverb cmd\n",
3655                         i, cmd.flow_attr.size);
3656                 err = -EINVAL;
3657                 goto err_free;
3658         }
3659
3660         flow_id = qp->device->create_flow(qp, flow_attr,
3661                                           IB_FLOW_DOMAIN_USER, uhw);
3662
3663         if (IS_ERR(flow_id)) {
3664                 err = PTR_ERR(flow_id);
3665                 goto err_free;
3666         }
3667         atomic_inc(&qp->usecnt);
3668         flow_id->qp = qp;
3669         flow_id->uobject = uobj;
3670         uobj->object = flow_id;
3671         uflow = container_of(uobj, typeof(*uflow), uobject);
3672         uflow->resources = uflow_res;
3673
3674         memset(&resp, 0, sizeof(resp));
3675         resp.flow_handle = uobj->id;
3676
3677         err = ib_copy_to_udata(ucore,
3678                                &resp, sizeof(resp));
3679         if (err)
3680                 goto err_copy;
3681
3682         uobj_put_obj_read(qp);
3683         uobj_alloc_commit(uobj);
3684         kfree(flow_attr);
3685         if (cmd.flow_attr.num_of_specs)
3686                 kfree(kern_flow_attr);
3687         return 0;
3688 err_copy:
3689         ib_destroy_flow(flow_id);
3690 err_free:
3691         ib_uverbs_flow_resources_free(uflow_res);
3692 err_free_flow_attr:
3693         kfree(flow_attr);
3694 err_put:
3695         uobj_put_obj_read(qp);
3696 err_uobj:
3697         uobj_alloc_abort(uobj);
3698 err_free_attr:
3699         if (cmd.flow_attr.num_of_specs)
3700                 kfree(kern_flow_attr);
3701         return err;
3702 }
3703
3704 int ib_uverbs_ex_destroy_flow(struct ib_uverbs_file *file,
3705                               struct ib_device *ib_dev,
3706                               struct ib_udata *ucore,
3707                               struct ib_udata *uhw)
3708 {
3709         struct ib_uverbs_destroy_flow   cmd;
3710         struct ib_uobject               *uobj;
3711         int                             ret;
3712
3713         if (ucore->inlen < sizeof(cmd))
3714                 return -EINVAL;
3715
3716         ret = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3717         if (ret)
3718                 return ret;
3719
3720         if (cmd.comp_mask)
3721                 return -EINVAL;
3722
3723         uobj  = uobj_get_write(UVERBS_OBJECT_FLOW, cmd.flow_handle,
3724                                file->ucontext);
3725         if (IS_ERR(uobj))
3726                 return PTR_ERR(uobj);
3727
3728         ret = uobj_remove_commit(uobj);
3729         return ret;
3730 }
3731
3732 static int __uverbs_create_xsrq(struct ib_uverbs_file *file,
3733                                 struct ib_device *ib_dev,
3734                                 struct ib_uverbs_create_xsrq *cmd,
3735                                 struct ib_udata *udata)
3736 {
3737         struct ib_uverbs_create_srq_resp resp;
3738         struct ib_usrq_object           *obj;
3739         struct ib_pd                    *pd;
3740         struct ib_srq                   *srq;
3741         struct ib_uobject               *uninitialized_var(xrcd_uobj);
3742         struct ib_srq_init_attr          attr;
3743         int ret;
3744
3745         obj  = (struct ib_usrq_object *)uobj_alloc(UVERBS_OBJECT_SRQ,
3746                                                    file->ucontext);
3747         if (IS_ERR(obj))
3748                 return PTR_ERR(obj);
3749
3750         if (cmd->srq_type == IB_SRQT_TM)
3751                 attr.ext.tag_matching.max_num_tags = cmd->max_num_tags;
3752
3753         if (cmd->srq_type == IB_SRQT_XRC) {
3754                 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->xrcd_handle,
3755                                           file->ucontext);
3756                 if (IS_ERR(xrcd_uobj)) {
3757                         ret = -EINVAL;
3758                         goto err;
3759                 }
3760
3761                 attr.ext.xrc.xrcd = (struct ib_xrcd *)xrcd_uobj->object;
3762                 if (!attr.ext.xrc.xrcd) {
3763                         ret = -EINVAL;
3764                         goto err_put_xrcd;
3765                 }
3766
3767                 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
3768                 atomic_inc(&obj->uxrcd->refcnt);
3769         }
3770
3771         if (ib_srq_has_cq(cmd->srq_type)) {
3772                 attr.ext.cq  = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd->cq_handle,
3773                                                  file->ucontext);
3774                 if (!attr.ext.cq) {
3775                         ret = -EINVAL;
3776                         goto err_put_xrcd;
3777                 }
3778         }
3779
3780         pd  = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle, file->ucontext);
3781         if (!pd) {
3782                 ret = -EINVAL;
3783                 goto err_put_cq;
3784         }
3785
3786         attr.event_handler  = ib_uverbs_srq_event_handler;
3787         attr.srq_context    = file;
3788         attr.srq_type       = cmd->srq_type;
3789         attr.attr.max_wr    = cmd->max_wr;
3790         attr.attr.max_sge   = cmd->max_sge;
3791         attr.attr.srq_limit = cmd->srq_limit;
3792
3793         obj->uevent.events_reported = 0;
3794         INIT_LIST_HEAD(&obj->uevent.event_list);
3795
3796         srq = pd->device->create_srq(pd, &attr, udata);
3797         if (IS_ERR(srq)) {
3798                 ret = PTR_ERR(srq);
3799                 goto err_put;
3800         }
3801
3802         srq->device        = pd->device;
3803         srq->pd            = pd;
3804         srq->srq_type      = cmd->srq_type;
3805         srq->uobject       = &obj->uevent.uobject;
3806         srq->event_handler = attr.event_handler;
3807         srq->srq_context   = attr.srq_context;
3808
3809         if (ib_srq_has_cq(cmd->srq_type)) {
3810                 srq->ext.cq       = attr.ext.cq;
3811                 atomic_inc(&attr.ext.cq->usecnt);
3812         }
3813
3814         if (cmd->srq_type == IB_SRQT_XRC) {
3815                 srq->ext.xrc.xrcd = attr.ext.xrc.xrcd;
3816                 atomic_inc(&attr.ext.xrc.xrcd->usecnt);
3817         }
3818
3819         atomic_inc(&pd->usecnt);
3820         atomic_set(&srq->usecnt, 0);
3821
3822         obj->uevent.uobject.object = srq;
3823         obj->uevent.uobject.user_handle = cmd->user_handle;
3824
3825         memset(&resp, 0, sizeof resp);
3826         resp.srq_handle = obj->uevent.uobject.id;
3827         resp.max_wr     = attr.attr.max_wr;
3828         resp.max_sge    = attr.attr.max_sge;
3829         if (cmd->srq_type == IB_SRQT_XRC)
3830                 resp.srqn = srq->ext.xrc.srq_num;
3831
3832         if (copy_to_user(u64_to_user_ptr(cmd->response),
3833                          &resp, sizeof resp)) {
3834                 ret = -EFAULT;
3835                 goto err_copy;
3836         }
3837
3838         if (cmd->srq_type == IB_SRQT_XRC)
3839                 uobj_put_read(xrcd_uobj);
3840
3841         if (ib_srq_has_cq(cmd->srq_type))
3842                 uobj_put_obj_read(attr.ext.cq);
3843
3844         uobj_put_obj_read(pd);
3845         uobj_alloc_commit(&obj->uevent.uobject);
3846
3847         return 0;
3848
3849 err_copy:
3850         ib_destroy_srq(srq);
3851
3852 err_put:
3853         uobj_put_obj_read(pd);
3854
3855 err_put_cq:
3856         if (ib_srq_has_cq(cmd->srq_type))
3857                 uobj_put_obj_read(attr.ext.cq);
3858
3859 err_put_xrcd:
3860         if (cmd->srq_type == IB_SRQT_XRC) {
3861                 atomic_dec(&obj->uxrcd->refcnt);
3862                 uobj_put_read(xrcd_uobj);
3863         }
3864
3865 err:
3866         uobj_alloc_abort(&obj->uevent.uobject);
3867         return ret;
3868 }
3869
3870 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
3871                              struct ib_device *ib_dev,
3872                              const char __user *buf, int in_len,
3873                              int out_len)
3874 {
3875         struct ib_uverbs_create_srq      cmd;
3876         struct ib_uverbs_create_xsrq     xcmd;
3877         struct ib_uverbs_create_srq_resp resp;
3878         struct ib_udata                  udata;
3879         int ret;
3880
3881         if (out_len < sizeof resp)
3882                 return -ENOSPC;
3883
3884         if (copy_from_user(&cmd, buf, sizeof cmd))
3885                 return -EFAULT;
3886
3887         memset(&xcmd, 0, sizeof(xcmd));
3888         xcmd.response    = cmd.response;
3889         xcmd.user_handle = cmd.user_handle;
3890         xcmd.srq_type    = IB_SRQT_BASIC;
3891         xcmd.pd_handle   = cmd.pd_handle;
3892         xcmd.max_wr      = cmd.max_wr;
3893         xcmd.max_sge     = cmd.max_sge;
3894         xcmd.srq_limit   = cmd.srq_limit;
3895
3896         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
3897                    u64_to_user_ptr(cmd.response) + sizeof(resp),
3898                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
3899                    out_len - sizeof(resp));
3900
3901         ret = __uverbs_create_xsrq(file, ib_dev, &xcmd, &udata);
3902         if (ret)
3903                 return ret;
3904
3905         return in_len;
3906 }
3907
3908 ssize_t ib_uverbs_create_xsrq(struct ib_uverbs_file *file,
3909                               struct ib_device *ib_dev,
3910                               const char __user *buf, int in_len, int out_len)
3911 {
3912         struct ib_uverbs_create_xsrq     cmd;
3913         struct ib_uverbs_create_srq_resp resp;
3914         struct ib_udata                  udata;
3915         int ret;
3916
3917         if (out_len < sizeof resp)
3918                 return -ENOSPC;
3919
3920         if (copy_from_user(&cmd, buf, sizeof cmd))
3921                 return -EFAULT;
3922
3923         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
3924                    u64_to_user_ptr(cmd.response) + sizeof(resp),
3925                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
3926                    out_len - sizeof(resp));
3927
3928         ret = __uverbs_create_xsrq(file, ib_dev, &cmd, &udata);
3929         if (ret)
3930                 return ret;
3931
3932         return in_len;
3933 }
3934
3935 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
3936                              struct ib_device *ib_dev,
3937                              const char __user *buf, int in_len,
3938                              int out_len)
3939 {
3940         struct ib_uverbs_modify_srq cmd;
3941         struct ib_udata             udata;
3942         struct ib_srq              *srq;
3943         struct ib_srq_attr          attr;
3944         int                         ret;
3945
3946         if (copy_from_user(&cmd, buf, sizeof cmd))
3947                 return -EFAULT;
3948
3949         ib_uverbs_init_udata(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
3950                    out_len);
3951
3952         srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, file->ucontext);
3953         if (!srq)
3954                 return -EINVAL;
3955
3956         attr.max_wr    = cmd.max_wr;
3957         attr.srq_limit = cmd.srq_limit;
3958
3959         ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata);
3960
3961         uobj_put_obj_read(srq);
3962
3963         return ret ? ret : in_len;
3964 }
3965
3966 ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
3967                             struct ib_device *ib_dev,
3968                             const char __user *buf,
3969                             int in_len, int out_len)
3970 {
3971         struct ib_uverbs_query_srq      cmd;
3972         struct ib_uverbs_query_srq_resp resp;
3973         struct ib_srq_attr              attr;
3974         struct ib_srq                   *srq;
3975         int                             ret;
3976
3977         if (out_len < sizeof resp)
3978                 return -ENOSPC;
3979
3980         if (copy_from_user(&cmd, buf, sizeof cmd))
3981                 return -EFAULT;
3982
3983         srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, file->ucontext);
3984         if (!srq)
3985                 return -EINVAL;
3986
3987         ret = ib_query_srq(srq, &attr);
3988
3989         uobj_put_obj_read(srq);
3990
3991         if (ret)
3992                 return ret;
3993
3994         memset(&resp, 0, sizeof resp);
3995
3996         resp.max_wr    = attr.max_wr;
3997         resp.max_sge   = attr.max_sge;
3998         resp.srq_limit = attr.srq_limit;
3999
4000         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
4001                 return -EFAULT;
4002
4003         return in_len;
4004 }
4005
4006 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
4007                               struct ib_device *ib_dev,
4008                               const char __user *buf, int in_len,
4009                               int out_len)
4010 {
4011         struct ib_uverbs_destroy_srq      cmd;
4012         struct ib_uverbs_destroy_srq_resp resp;
4013         struct ib_uobject                *uobj;
4014         struct ib_uevent_object          *obj;
4015         int                               ret = -EINVAL;
4016
4017         if (copy_from_user(&cmd, buf, sizeof cmd))
4018                 return -EFAULT;
4019
4020         uobj  = uobj_get_write(UVERBS_OBJECT_SRQ, cmd.srq_handle,
4021                                file->ucontext);
4022         if (IS_ERR(uobj))
4023                 return PTR_ERR(uobj);
4024
4025         obj = container_of(uobj, struct ib_uevent_object, uobject);
4026         /*
4027          * Make sure we don't free the memory in remove_commit as we still
4028          * needs the uobject memory to create the response.
4029          */
4030         uverbs_uobject_get(uobj);
4031
4032         memset(&resp, 0, sizeof(resp));
4033
4034         ret = uobj_remove_commit(uobj);
4035         if (ret) {
4036                 uverbs_uobject_put(uobj);
4037                 return ret;
4038         }
4039         resp.events_reported = obj->events_reported;
4040         uverbs_uobject_put(uobj);
4041         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof(resp)))
4042                 return -EFAULT;
4043
4044         return in_len;
4045 }
4046
4047 int ib_uverbs_ex_query_device(struct ib_uverbs_file *file,
4048                               struct ib_device *ib_dev,
4049                               struct ib_udata *ucore,
4050                               struct ib_udata *uhw)
4051 {
4052         struct ib_uverbs_ex_query_device_resp resp = { {0} };
4053         struct ib_uverbs_ex_query_device  cmd;
4054         struct ib_device_attr attr = {0};
4055         int err;
4056
4057         if (!ib_dev->query_device)
4058                 return -EOPNOTSUPP;
4059
4060         if (ucore->inlen < sizeof(cmd))
4061                 return -EINVAL;
4062
4063         err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
4064         if (err)
4065                 return err;
4066
4067         if (cmd.comp_mask)
4068                 return -EINVAL;
4069
4070         if (cmd.reserved)
4071                 return -EINVAL;
4072
4073         resp.response_length = offsetof(typeof(resp), odp_caps);
4074
4075         if (ucore->outlen < resp.response_length)
4076                 return -ENOSPC;
4077
4078         err = ib_dev->query_device(ib_dev, &attr, uhw);
4079         if (err)
4080                 return err;
4081
4082         copy_query_dev_fields(file, ib_dev, &resp.base, &attr);
4083
4084         if (ucore->outlen < resp.response_length + sizeof(resp.odp_caps))
4085                 goto end;
4086
4087 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
4088         resp.odp_caps.general_caps = attr.odp_caps.general_caps;
4089         resp.odp_caps.per_transport_caps.rc_odp_caps =
4090                 attr.odp_caps.per_transport_caps.rc_odp_caps;
4091         resp.odp_caps.per_transport_caps.uc_odp_caps =
4092                 attr.odp_caps.per_transport_caps.uc_odp_caps;
4093         resp.odp_caps.per_transport_caps.ud_odp_caps =
4094                 attr.odp_caps.per_transport_caps.ud_odp_caps;
4095 #endif
4096         resp.response_length += sizeof(resp.odp_caps);
4097
4098         if (ucore->outlen < resp.response_length + sizeof(resp.timestamp_mask))
4099                 goto end;
4100
4101         resp.timestamp_mask = attr.timestamp_mask;
4102         resp.response_length += sizeof(resp.timestamp_mask);
4103
4104         if (ucore->outlen < resp.response_length + sizeof(resp.hca_core_clock))
4105                 goto end;
4106
4107         resp.hca_core_clock = attr.hca_core_clock;
4108         resp.response_length += sizeof(resp.hca_core_clock);
4109
4110         if (ucore->outlen < resp.response_length + sizeof(resp.device_cap_flags_ex))
4111                 goto end;
4112
4113         resp.device_cap_flags_ex = attr.device_cap_flags;
4114         resp.response_length += sizeof(resp.device_cap_flags_ex);
4115
4116         if (ucore->outlen < resp.response_length + sizeof(resp.rss_caps))
4117                 goto end;
4118
4119         resp.rss_caps.supported_qpts = attr.rss_caps.supported_qpts;
4120         resp.rss_caps.max_rwq_indirection_tables =
4121                 attr.rss_caps.max_rwq_indirection_tables;
4122         resp.rss_caps.max_rwq_indirection_table_size =
4123                 attr.rss_caps.max_rwq_indirection_table_size;
4124
4125         resp.response_length += sizeof(resp.rss_caps);
4126
4127         if (ucore->outlen < resp.response_length + sizeof(resp.max_wq_type_rq))
4128                 goto end;
4129
4130         resp.max_wq_type_rq = attr.max_wq_type_rq;
4131         resp.response_length += sizeof(resp.max_wq_type_rq);
4132
4133         if (ucore->outlen < resp.response_length + sizeof(resp.raw_packet_caps))
4134                 goto end;
4135
4136         resp.raw_packet_caps = attr.raw_packet_caps;
4137         resp.response_length += sizeof(resp.raw_packet_caps);
4138
4139         if (ucore->outlen < resp.response_length + sizeof(resp.tm_caps))
4140                 goto end;
4141
4142         resp.tm_caps.max_rndv_hdr_size  = attr.tm_caps.max_rndv_hdr_size;
4143         resp.tm_caps.max_num_tags       = attr.tm_caps.max_num_tags;
4144         resp.tm_caps.max_ops            = attr.tm_caps.max_ops;
4145         resp.tm_caps.max_sge            = attr.tm_caps.max_sge;
4146         resp.tm_caps.flags              = attr.tm_caps.flags;
4147         resp.response_length += sizeof(resp.tm_caps);
4148
4149         if (ucore->outlen < resp.response_length + sizeof(resp.cq_moderation_caps))
4150                 goto end;
4151
4152         resp.cq_moderation_caps.max_cq_moderation_count  =
4153                 attr.cq_caps.max_cq_moderation_count;
4154         resp.cq_moderation_caps.max_cq_moderation_period =
4155                 attr.cq_caps.max_cq_moderation_period;
4156         resp.response_length += sizeof(resp.cq_moderation_caps);
4157
4158         if (ucore->outlen < resp.response_length + sizeof(resp.max_dm_size))
4159                 goto end;
4160
4161         resp.max_dm_size = attr.max_dm_size;
4162         resp.response_length += sizeof(resp.max_dm_size);
4163 end:
4164         err = ib_copy_to_udata(ucore, &resp, resp.response_length);
4165         return err;
4166 }
4167
4168 int ib_uverbs_ex_modify_cq(struct ib_uverbs_file *file,
4169                            struct ib_device *ib_dev,
4170                            struct ib_udata *ucore,
4171                            struct ib_udata *uhw)
4172 {
4173         struct ib_uverbs_ex_modify_cq cmd = {};
4174         struct ib_cq *cq;
4175         size_t required_cmd_sz;
4176         int ret;
4177
4178         required_cmd_sz = offsetof(typeof(cmd), reserved) +
4179                                 sizeof(cmd.reserved);
4180         if (ucore->inlen < required_cmd_sz)
4181                 return -EINVAL;
4182
4183         /* sanity checks */
4184         if (ucore->inlen > sizeof(cmd) &&
4185             !ib_is_udata_cleared(ucore, sizeof(cmd),
4186                                  ucore->inlen - sizeof(cmd)))
4187                 return -EOPNOTSUPP;
4188
4189         ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
4190         if (ret)
4191                 return ret;
4192
4193         if (!cmd.attr_mask || cmd.reserved)
4194                 return -EINVAL;
4195
4196         if (cmd.attr_mask > IB_CQ_MODERATE)
4197                 return -EOPNOTSUPP;
4198
4199         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, file->ucontext);
4200         if (!cq)
4201                 return -EINVAL;
4202
4203         ret = rdma_set_cq_moderation(cq, cmd.attr.cq_count, cmd.attr.cq_period);
4204
4205         uobj_put_obj_read(cq);
4206
4207         return ret;
4208 }