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 /*
  51  * Copy a response to userspace. If the provided 'resp' is larger than the
  52  * user buffer it is silently truncated. If the user provided a larger buffer
  53  * then the trailing portion is zero filled.
  54  *
  55  * These semantics are intended to support future extension of the output
  56  * structures.
  57  */
  58 static int uverbs_response(struct uverbs_attr_bundle *attrs, const void *resp,
  59                            size_t resp_len)
  60 {
  61         int ret;
  62
  63         if (copy_to_user(attrs->ucore.outbuf, resp,
  64                          min(attrs->ucore.outlen, resp_len)))
  65                 return -EFAULT;
  66
  67         if (resp_len < attrs->ucore.outlen) {
  68                 /*
  69                  * Zero fill any extra memory that user
  70                  * space might have provided.
  71                  */
  72                 ret = clear_user(attrs->ucore.outbuf + resp_len,
  73                                  attrs->ucore.outlen - resp_len);
  74                 if (ret)
  75                         return -EFAULT;
  76         }
  77
  78         return 0;
  79 }
  80
  81 /*
  82  * Copy a request from userspace. If the provided 'req' is larger than the
  83  * user buffer then the user buffer is zero extended into the 'req'. If 'req'
  84  * is smaller than the user buffer then the uncopied bytes in the user buffer
  85  * must be zero.
  86  */
  87 static int uverbs_request(struct uverbs_attr_bundle *attrs, void *req,
  88                           size_t req_len)
  89 {
  90         if (copy_from_user(req, attrs->ucore.inbuf,
  91                            min(attrs->ucore.inlen, req_len)))
  92                 return -EFAULT;
  93
  94         if (attrs->ucore.inlen < req_len) {
  95                 memset(req + attrs->ucore.inlen, 0,
  96                        req_len - attrs->ucore.inlen);
  97         } else if (attrs->ucore.inlen > req_len) {
  98                 if (!ib_is_buffer_cleared(attrs->ucore.inbuf + req_len,
  99                                           attrs->ucore.inlen - req_len))
 100                         return -EOPNOTSUPP;
 101         }
 102         return 0;
 103 }
 104
 105 /*
 106  * Generate the value for the 'response_length' protocol used by write_ex.
 107  * This is the number of bytes the kernel actually wrote. Userspace can use
 108  * this to detect what structure members in the response the kernel
 109  * understood.
 110  */
 111 static u32 uverbs_response_length(struct uverbs_attr_bundle *attrs,
 112                                   size_t resp_len)
 113 {
 114         return min_t(size_t, attrs->ucore.outlen, resp_len);
 115 }
 116
 117 /*
 118  * The iterator version of the request interface is for handlers that need to
 119  * step over a flex array at the end of a command header.
 120  */
 121 struct uverbs_req_iter {
 122         const void __user *cur;
 123         const void __user *end;
 124 };
 125
 126 static int uverbs_request_start(struct uverbs_attr_bundle *attrs,
 127                                 struct uverbs_req_iter *iter,
 128                                 void *req,
 129                                 size_t req_len)
 130 {
 131         if (attrs->ucore.inlen < req_len)
 132                 return -ENOSPC;
 133
 134         if (copy_from_user(req, attrs->ucore.inbuf, req_len))
 135                 return -EFAULT;
 136
 137         iter->cur = attrs->ucore.inbuf + req_len;
 138         iter->end = attrs->ucore.inbuf + attrs->ucore.inlen;
 139         return 0;
 140 }
 141
 142 static int uverbs_request_next(struct uverbs_req_iter *iter, void *val,
 143                                size_t len)
 144 {
 145         if (iter->cur + len > iter->end)
 146                 return -ENOSPC;
 147
 148         if (copy_from_user(val, iter->cur, len))
 149                 return -EFAULT;
 150
 151         iter->cur += len;
 152         return 0;
 153 }
 154
 155 static const void __user *uverbs_request_next_ptr(struct uverbs_req_iter *iter,
 156                                                   size_t len)
 157 {
 158         const void __user *res = iter->cur;
 159
 160         if (iter->cur + len > iter->end)
 161                 return ERR_PTR(-ENOSPC);
 162         iter->cur += len;
 163         return res;
 164 }
 165
 166 static int uverbs_request_finish(struct uverbs_req_iter *iter)
 167 {
 168         if (!ib_is_buffer_cleared(iter->cur, iter->end - iter->cur))
 169                 return -EOPNOTSUPP;
 170         return 0;
 171 }
 172
 173 static struct ib_uverbs_completion_event_file *
 174 _ib_uverbs_lookup_comp_file(s32 fd, const struct uverbs_attr_bundle *attrs)
 175 {
 176         struct ib_uobject *uobj = ufd_get_read(UVERBS_OBJECT_COMP_CHANNEL,
 177                                                fd, attrs);
 178
 179         if (IS_ERR(uobj))
 180                 return (void *)uobj;
 181
 182         uverbs_uobject_get(uobj);
 183         uobj_put_read(uobj);
 184
 185         return container_of(uobj, struct ib_uverbs_completion_event_file,
 186                             uobj);
 187 }
 188 #define ib_uverbs_lookup_comp_file(_fd, _ufile)                                \
 189         _ib_uverbs_lookup_comp_file((_fd)*typecheck(s32, _fd), _ufile)
 190
 191 static int ib_uverbs_get_context(struct uverbs_attr_bundle *attrs)
 192 {
 193         struct ib_uverbs_file *file = attrs->ufile;
 194         struct ib_uverbs_get_context      cmd;
 195         struct ib_uverbs_get_context_resp resp;
 196         struct ib_ucontext               *ucontext;
 197         struct file                      *filp;
 198         struct ib_rdmacg_object          cg_obj;
 199         struct ib_device *ib_dev;
 200         int ret;
 201
 202         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 203         if (ret)
 204                 return ret;
 205
 206         mutex_lock(&file->ucontext_lock);
 207         ib_dev = srcu_dereference(file->device->ib_dev,
 208                                   &file->device->disassociate_srcu);
 209         if (!ib_dev) {
 210                 ret = -EIO;
 211                 goto err;
 212         }
 213
 214         if (file->ucontext) {
 215                 ret = -EINVAL;
 216                 goto err;
 217         }
 218
 219         ret = ib_rdmacg_try_charge(&cg_obj, ib_dev, RDMACG_RESOURCE_HCA_HANDLE);
 220         if (ret)
 221                 goto err;
 222
 223         ucontext = ib_dev->ops.alloc_ucontext(ib_dev, &attrs->driver_udata);
 224         if (IS_ERR(ucontext)) {
 225                 ret = PTR_ERR(ucontext);
 226                 goto err_alloc;
 227         }
 228
 229         ucontext->device = ib_dev;
 230         ucontext->cg_obj = cg_obj;
 231         /* ufile is required when some objects are released */
 232         ucontext->ufile = file;
 233
 234         ucontext->closing = false;
 235         ucontext->cleanup_retryable = false;
 236
 237 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
 238         mutex_init(&ucontext->per_mm_list_lock);
 239         INIT_LIST_HEAD(&ucontext->per_mm_list);
 240         if (!(ib_dev->attrs.device_cap_flags & IB_DEVICE_ON_DEMAND_PAGING))
 241                 ucontext->invalidate_range = NULL;
 242
 243 #endif
 244
 245         resp.num_comp_vectors = file->device->num_comp_vectors;
 246
 247         ret = get_unused_fd_flags(O_CLOEXEC);
 248         if (ret < 0)
 249                 goto err_free;
 250         resp.async_fd = ret;
 251
 252         filp = ib_uverbs_alloc_async_event_file(file, ib_dev);
 253         if (IS_ERR(filp)) {
 254                 ret = PTR_ERR(filp);
 255                 goto err_fd;
 256         }
 257
 258         ret = uverbs_response(attrs, &resp, sizeof(resp));
 259         if (ret)
 260                 goto err_file;
 261
 262         fd_install(resp.async_fd, filp);
 263
 264         ucontext->res.type = RDMA_RESTRACK_CTX;
 265         rdma_restrack_uadd(&ucontext->res);
 266
 267         /*
 268          * Make sure that ib_uverbs_get_ucontext() sees the pointer update
 269          * only after all writes to setup the ucontext have completed
 270          */
 271         smp_store_release(&file->ucontext, ucontext);
 272
 273         mutex_unlock(&file->ucontext_lock);
 274
 275         return 0;
 276
 277 err_file:
 278         ib_uverbs_free_async_event_file(file);
 279         fput(filp);
 280
 281 err_fd:
 282         put_unused_fd(resp.async_fd);
 283
 284 err_free:
 285         ib_dev->ops.dealloc_ucontext(ucontext);
 286
 287 err_alloc:
 288         ib_rdmacg_uncharge(&cg_obj, ib_dev, RDMACG_RESOURCE_HCA_HANDLE);
 289
 290 err:
 291         mutex_unlock(&file->ucontext_lock);
 292         return ret;
 293 }
 294
 295 static void copy_query_dev_fields(struct ib_ucontext *ucontext,
 296                                   struct ib_uverbs_query_device_resp *resp,
 297                                   struct ib_device_attr *attr)
 298 {
 299         struct ib_device *ib_dev = ucontext->device;
 300
 301         resp->fw_ver            = attr->fw_ver;
 302         resp->node_guid         = ib_dev->node_guid;
 303         resp->sys_image_guid    = attr->sys_image_guid;
 304         resp->max_mr_size       = attr->max_mr_size;
 305         resp->page_size_cap     = attr->page_size_cap;
 306         resp->vendor_id         = attr->vendor_id;
 307         resp->vendor_part_id    = attr->vendor_part_id;
 308         resp->hw_ver            = attr->hw_ver;
 309         resp->max_qp            = attr->max_qp;
 310         resp->max_qp_wr         = attr->max_qp_wr;
 311         resp->device_cap_flags  = lower_32_bits(attr->device_cap_flags);
 312         resp->max_sge           = min(attr->max_send_sge, attr->max_recv_sge);
 313         resp->max_sge_rd        = attr->max_sge_rd;
 314         resp->max_cq            = attr->max_cq;
 315         resp->max_cqe           = attr->max_cqe;
 316         resp->max_mr            = attr->max_mr;
 317         resp->max_pd            = attr->max_pd;
 318         resp->max_qp_rd_atom    = attr->max_qp_rd_atom;
 319         resp->max_ee_rd_atom    = attr->max_ee_rd_atom;
 320         resp->max_res_rd_atom   = attr->max_res_rd_atom;
 321         resp->max_qp_init_rd_atom       = attr->max_qp_init_rd_atom;
 322         resp->max_ee_init_rd_atom       = attr->max_ee_init_rd_atom;
 323         resp->atomic_cap                = attr->atomic_cap;
 324         resp->max_ee                    = attr->max_ee;
 325         resp->max_rdd                   = attr->max_rdd;
 326         resp->max_mw                    = attr->max_mw;
 327         resp->max_raw_ipv6_qp           = attr->max_raw_ipv6_qp;
 328         resp->max_raw_ethy_qp           = attr->max_raw_ethy_qp;
 329         resp->max_mcast_grp             = attr->max_mcast_grp;
 330         resp->max_mcast_qp_attach       = attr->max_mcast_qp_attach;
 331         resp->max_total_mcast_qp_attach = attr->max_total_mcast_qp_attach;
 332         resp->max_ah                    = attr->max_ah;
 333         resp->max_fmr                   = attr->max_fmr;
 334         resp->max_map_per_fmr           = attr->max_map_per_fmr;
 335         resp->max_srq                   = attr->max_srq;
 336         resp->max_srq_wr                = attr->max_srq_wr;
 337         resp->max_srq_sge               = attr->max_srq_sge;
 338         resp->max_pkeys                 = attr->max_pkeys;
 339         resp->local_ca_ack_delay        = attr->local_ca_ack_delay;
 340         resp->phys_port_cnt             = ib_dev->phys_port_cnt;
 341 }
 342
 343 static int ib_uverbs_query_device(struct uverbs_attr_bundle *attrs)
 344 {
 345         struct ib_uverbs_query_device      cmd;
 346         struct ib_uverbs_query_device_resp resp;
 347         struct ib_ucontext *ucontext;
 348         int ret;
 349
 350         ucontext = ib_uverbs_get_ucontext(attrs);
 351         if (IS_ERR(ucontext))
 352                 return PTR_ERR(ucontext);
 353
 354         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 355         if (ret)
 356                 return ret;
 357
 358         memset(&resp, 0, sizeof resp);
 359         copy_query_dev_fields(ucontext, &resp, &ucontext->device->attrs);
 360
 361         return uverbs_response(attrs, &resp, sizeof(resp));
 362 }
 363
 364 static int ib_uverbs_query_port(struct uverbs_attr_bundle *attrs)
 365 {
 366         struct ib_uverbs_query_port      cmd;
 367         struct ib_uverbs_query_port_resp resp;
 368         struct ib_port_attr              attr;
 369         int                              ret;
 370         struct ib_ucontext *ucontext;
 371         struct ib_device *ib_dev;
 372
 373         ucontext = ib_uverbs_get_ucontext(attrs);
 374         if (IS_ERR(ucontext))
 375                 return PTR_ERR(ucontext);
 376         ib_dev = ucontext->device;
 377
 378         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 379         if (ret)
 380                 return ret;
 381
 382         ret = ib_query_port(ib_dev, cmd.port_num, &attr);
 383         if (ret)
 384                 return ret;
 385
 386         memset(&resp, 0, sizeof resp);
 387         copy_port_attr_to_resp(&attr, &resp, ib_dev, cmd.port_num);
 388
 389         return uverbs_response(attrs, &resp, sizeof(resp));
 390 }
 391
 392 static int ib_uverbs_alloc_pd(struct uverbs_attr_bundle *attrs)
 393 {
 394         struct ib_uverbs_alloc_pd      cmd;
 395         struct ib_uverbs_alloc_pd_resp resp;
 396         struct ib_uobject             *uobj;
 397         struct ib_pd                  *pd;
 398         int                            ret;
 399         struct ib_device *ib_dev;
 400
 401         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 402         if (ret)
 403                 return ret;
 404
 405         uobj = uobj_alloc(UVERBS_OBJECT_PD, attrs, &ib_dev);
 406         if (IS_ERR(uobj))
 407                 return PTR_ERR(uobj);
 408
 409         pd = ib_dev->ops.alloc_pd(ib_dev, uobj->context, &attrs->driver_udata);
 410         if (IS_ERR(pd)) {
 411                 ret = PTR_ERR(pd);
 412                 goto err;
 413         }
 414
 415         pd->device  = ib_dev;
 416         pd->uobject = uobj;
 417         pd->__internal_mr = NULL;
 418         atomic_set(&pd->usecnt, 0);
 419
 420         uobj->object = pd;
 421         memset(&resp, 0, sizeof resp);
 422         resp.pd_handle = uobj->id;
 423         pd->res.type = RDMA_RESTRACK_PD;
 424         rdma_restrack_uadd(&pd->res);
 425
 426         ret = uverbs_response(attrs, &resp, sizeof(resp));
 427         if (ret)
 428                 goto err_copy;
 429
 430         return uobj_alloc_commit(uobj);
 431
 432 err_copy:
 433         ib_dealloc_pd(pd);
 434
 435 err:
 436         uobj_alloc_abort(uobj);
 437         return ret;
 438 }
 439
 440 static int ib_uverbs_dealloc_pd(struct uverbs_attr_bundle *attrs)
 441 {
 442         struct ib_uverbs_dealloc_pd cmd;
 443         int ret;
 444
 445         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 446         if (ret)
 447                 return ret;
 448
 449         return uobj_perform_destroy(UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
 450 }
 451
 452 struct xrcd_table_entry {
 453         struct rb_node  node;
 454         struct ib_xrcd *xrcd;
 455         struct inode   *inode;
 456 };
 457
 458 static int xrcd_table_insert(struct ib_uverbs_device *dev,
 459                             struct inode *inode,
 460                             struct ib_xrcd *xrcd)
 461 {
 462         struct xrcd_table_entry *entry, *scan;
 463         struct rb_node **p = &dev->xrcd_tree.rb_node;
 464         struct rb_node *parent = NULL;
 465
 466         entry = kmalloc(sizeof *entry, GFP_KERNEL);
 467         if (!entry)
 468                 return -ENOMEM;
 469
 470         entry->xrcd  = xrcd;
 471         entry->inode = inode;
 472
 473         while (*p) {
 474                 parent = *p;
 475                 scan = rb_entry(parent, struct xrcd_table_entry, node);
 476
 477                 if (inode < scan->inode) {
 478                         p = &(*p)->rb_left;
 479                 } else if (inode > scan->inode) {
 480                         p = &(*p)->rb_right;
 481                 } else {
 482                         kfree(entry);
 483                         return -EEXIST;
 484                 }
 485         }
 486
 487         rb_link_node(&entry->node, parent, p);
 488         rb_insert_color(&entry->node, &dev->xrcd_tree);
 489         igrab(inode);
 490         return 0;
 491 }
 492
 493 static struct xrcd_table_entry *xrcd_table_search(struct ib_uverbs_device *dev,
 494                                                   struct inode *inode)
 495 {
 496         struct xrcd_table_entry *entry;
 497         struct rb_node *p = dev->xrcd_tree.rb_node;
 498
 499         while (p) {
 500                 entry = rb_entry(p, struct xrcd_table_entry, node);
 501
 502                 if (inode < entry->inode)
 503                         p = p->rb_left;
 504                 else if (inode > entry->inode)
 505                         p = p->rb_right;
 506                 else
 507                         return entry;
 508         }
 509
 510         return NULL;
 511 }
 512
 513 static struct ib_xrcd *find_xrcd(struct ib_uverbs_device *dev, struct inode *inode)
 514 {
 515         struct xrcd_table_entry *entry;
 516
 517         entry = xrcd_table_search(dev, inode);
 518         if (!entry)
 519                 return NULL;
 520
 521         return entry->xrcd;
 522 }
 523
 524 static void xrcd_table_delete(struct ib_uverbs_device *dev,
 525                               struct inode *inode)
 526 {
 527         struct xrcd_table_entry *entry;
 528
 529         entry = xrcd_table_search(dev, inode);
 530         if (entry) {
 531                 iput(inode);
 532                 rb_erase(&entry->node, &dev->xrcd_tree);
 533                 kfree(entry);
 534         }
 535 }
 536
 537 static int ib_uverbs_open_xrcd(struct uverbs_attr_bundle *attrs)
 538 {
 539         struct ib_uverbs_device *ibudev = attrs->ufile->device;
 540         struct ib_uverbs_open_xrcd      cmd;
 541         struct ib_uverbs_open_xrcd_resp resp;
 542         struct ib_uxrcd_object         *obj;
 543         struct ib_xrcd                 *xrcd = NULL;
 544         struct fd                       f = {NULL, 0};
 545         struct inode                   *inode = NULL;
 546         int                             ret = 0;
 547         int                             new_xrcd = 0;
 548         struct ib_device *ib_dev;
 549
 550         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 551         if (ret)
 552                 return ret;
 553
 554         mutex_lock(&ibudev->xrcd_tree_mutex);
 555
 556         if (cmd.fd != -1) {
 557                 /* search for file descriptor */
 558                 f = fdget(cmd.fd);
 559                 if (!f.file) {
 560                         ret = -EBADF;
 561                         goto err_tree_mutex_unlock;
 562                 }
 563
 564                 inode = file_inode(f.file);
 565                 xrcd = find_xrcd(ibudev, inode);
 566                 if (!xrcd && !(cmd.oflags & O_CREAT)) {
 567                         /* no file descriptor. Need CREATE flag */
 568                         ret = -EAGAIN;
 569                         goto err_tree_mutex_unlock;
 570                 }
 571
 572                 if (xrcd && cmd.oflags & O_EXCL) {
 573                         ret = -EINVAL;
 574                         goto err_tree_mutex_unlock;
 575                 }
 576         }
 577
 578         obj = (struct ib_uxrcd_object *)uobj_alloc(UVERBS_OBJECT_XRCD, attrs,
 579                                                    &ib_dev);
 580         if (IS_ERR(obj)) {
 581                 ret = PTR_ERR(obj);
 582                 goto err_tree_mutex_unlock;
 583         }
 584
 585         if (!xrcd) {
 586                 xrcd = ib_dev->ops.alloc_xrcd(ib_dev, obj->uobject.context,
 587                                               &attrs->driver_udata);
 588                 if (IS_ERR(xrcd)) {
 589                         ret = PTR_ERR(xrcd);
 590                         goto err;
 591                 }
 592
 593                 xrcd->inode   = inode;
 594                 xrcd->device  = ib_dev;
 595                 atomic_set(&xrcd->usecnt, 0);
 596                 mutex_init(&xrcd->tgt_qp_mutex);
 597                 INIT_LIST_HEAD(&xrcd->tgt_qp_list);
 598                 new_xrcd = 1;
 599         }
 600
 601         atomic_set(&obj->refcnt, 0);
 602         obj->uobject.object = xrcd;
 603         memset(&resp, 0, sizeof resp);
 604         resp.xrcd_handle = obj->uobject.id;
 605
 606         if (inode) {
 607                 if (new_xrcd) {
 608                         /* create new inode/xrcd table entry */
 609                         ret = xrcd_table_insert(ibudev, inode, xrcd);
 610                         if (ret)
 611                                 goto err_dealloc_xrcd;
 612                 }
 613                 atomic_inc(&xrcd->usecnt);
 614         }
 615
 616         ret = uverbs_response(attrs, &resp, sizeof(resp));
 617         if (ret)
 618                 goto err_copy;
 619
 620         if (f.file)
 621                 fdput(f);
 622
 623         mutex_unlock(&ibudev->xrcd_tree_mutex);
 624
 625         return uobj_alloc_commit(&obj->uobject);
 626
 627 err_copy:
 628         if (inode) {
 629                 if (new_xrcd)
 630                         xrcd_table_delete(ibudev, inode);
 631                 atomic_dec(&xrcd->usecnt);
 632         }
 633
 634 err_dealloc_xrcd:
 635         ib_dealloc_xrcd(xrcd);
 636
 637 err:
 638         uobj_alloc_abort(&obj->uobject);
 639
 640 err_tree_mutex_unlock:
 641         if (f.file)
 642                 fdput(f);
 643
 644         mutex_unlock(&ibudev->xrcd_tree_mutex);
 645
 646         return ret;
 647 }
 648
 649 static int ib_uverbs_close_xrcd(struct uverbs_attr_bundle *attrs)
 650 {
 651         struct ib_uverbs_close_xrcd cmd;
 652         int ret;
 653
 654         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 655         if (ret)
 656                 return ret;
 657
 658         return uobj_perform_destroy(UVERBS_OBJECT_XRCD, cmd.xrcd_handle, attrs);
 659 }
 660
 661 int ib_uverbs_dealloc_xrcd(struct ib_uobject *uobject,
 662                            struct ib_xrcd *xrcd,
 663                            enum rdma_remove_reason why)
 664 {
 665         struct inode *inode;
 666         int ret;
 667         struct ib_uverbs_device *dev = uobject->context->ufile->device;
 668
 669         inode = xrcd->inode;
 670         if (inode && !atomic_dec_and_test(&xrcd->usecnt))
 671                 return 0;
 672
 673         ret = ib_dealloc_xrcd(xrcd);
 674
 675         if (ib_is_destroy_retryable(ret, why, uobject)) {
 676                 atomic_inc(&xrcd->usecnt);
 677                 return ret;
 678         }
 679
 680         if (inode)
 681                 xrcd_table_delete(dev, inode);
 682
 683         return ret;
 684 }
 685
 686 static int ib_uverbs_reg_mr(struct uverbs_attr_bundle *attrs)
 687 {
 688         struct ib_uverbs_reg_mr      cmd;
 689         struct ib_uverbs_reg_mr_resp resp;
 690         struct ib_uobject           *uobj;
 691         struct ib_pd                *pd;
 692         struct ib_mr                *mr;
 693         int                          ret;
 694         struct ib_device *ib_dev;
 695
 696         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 697         if (ret)
 698                 return ret;
 699
 700         if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
 701                 return -EINVAL;
 702
 703         ret = ib_check_mr_access(cmd.access_flags);
 704         if (ret)
 705                 return ret;
 706
 707         uobj = uobj_alloc(UVERBS_OBJECT_MR, attrs, &ib_dev);
 708         if (IS_ERR(uobj))
 709                 return PTR_ERR(uobj);
 710
 711         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
 712         if (!pd) {
 713                 ret = -EINVAL;
 714                 goto err_free;
 715         }
 716
 717         if (cmd.access_flags & IB_ACCESS_ON_DEMAND) {
 718                 if (!(pd->device->attrs.device_cap_flags &
 719                       IB_DEVICE_ON_DEMAND_PAGING)) {
 720                         pr_debug("ODP support not available\n");
 721                         ret = -EINVAL;
 722                         goto err_put;
 723                 }
 724         }
 725
 726         mr = pd->device->ops.reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
 727                                          cmd.access_flags,
 728                                          &attrs->driver_udata);
 729         if (IS_ERR(mr)) {
 730                 ret = PTR_ERR(mr);
 731                 goto err_put;
 732         }
 733
 734         mr->device  = pd->device;
 735         mr->pd      = pd;
 736         mr->dm      = NULL;
 737         mr->uobject = uobj;
 738         atomic_inc(&pd->usecnt);
 739         mr->res.type = RDMA_RESTRACK_MR;
 740         rdma_restrack_uadd(&mr->res);
 741
 742         uobj->object = mr;
 743
 744         memset(&resp, 0, sizeof resp);
 745         resp.lkey      = mr->lkey;
 746         resp.rkey      = mr->rkey;
 747         resp.mr_handle = uobj->id;
 748
 749         ret = uverbs_response(attrs, &resp, sizeof(resp));
 750         if (ret)
 751                 goto err_copy;
 752
 753         uobj_put_obj_read(pd);
 754
 755         return uobj_alloc_commit(uobj);
 756
 757 err_copy:
 758         ib_dereg_mr(mr);
 759
 760 err_put:
 761         uobj_put_obj_read(pd);
 762
 763 err_free:
 764         uobj_alloc_abort(uobj);
 765         return ret;
 766 }
 767
 768 static int ib_uverbs_rereg_mr(struct uverbs_attr_bundle *attrs)
 769 {
 770         struct ib_uverbs_rereg_mr      cmd;
 771         struct ib_uverbs_rereg_mr_resp resp;
 772         struct ib_pd                *pd = NULL;
 773         struct ib_mr                *mr;
 774         struct ib_pd                *old_pd;
 775         int                          ret;
 776         struct ib_uobject           *uobj;
 777
 778         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 779         if (ret)
 780                 return ret;
 781
 782         if (cmd.flags & ~IB_MR_REREG_SUPPORTED || !cmd.flags)
 783                 return -EINVAL;
 784
 785         if ((cmd.flags & IB_MR_REREG_TRANS) &&
 786             (!cmd.start || !cmd.hca_va || 0 >= cmd.length ||
 787              (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)))
 788                         return -EINVAL;
 789
 790         uobj = uobj_get_write(UVERBS_OBJECT_MR, cmd.mr_handle, attrs);
 791         if (IS_ERR(uobj))
 792                 return PTR_ERR(uobj);
 793
 794         mr = uobj->object;
 795
 796         if (mr->dm) {
 797                 ret = -EINVAL;
 798                 goto put_uobjs;
 799         }
 800
 801         if (cmd.flags & IB_MR_REREG_ACCESS) {
 802                 ret = ib_check_mr_access(cmd.access_flags);
 803                 if (ret)
 804                         goto put_uobjs;
 805         }
 806
 807         if (cmd.flags & IB_MR_REREG_PD) {
 808                 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle,
 809                                        attrs);
 810                 if (!pd) {
 811                         ret = -EINVAL;
 812                         goto put_uobjs;
 813                 }
 814         }
 815
 816         old_pd = mr->pd;
 817         ret = mr->device->ops.rereg_user_mr(mr, cmd.flags, cmd.start,
 818                                             cmd.length, cmd.hca_va,
 819                                             cmd.access_flags, pd,
 820                                             &attrs->driver_udata);
 821         if (!ret) {
 822                 if (cmd.flags & IB_MR_REREG_PD) {
 823                         atomic_inc(&pd->usecnt);
 824                         mr->pd = pd;
 825                         atomic_dec(&old_pd->usecnt);
 826                 }
 827         } else {
 828                 goto put_uobj_pd;
 829         }
 830
 831         memset(&resp, 0, sizeof(resp));
 832         resp.lkey      = mr->lkey;
 833         resp.rkey      = mr->rkey;
 834
 835         ret = uverbs_response(attrs, &resp, sizeof(resp));
 836
 837 put_uobj_pd:
 838         if (cmd.flags & IB_MR_REREG_PD)
 839                 uobj_put_obj_read(pd);
 840
 841 put_uobjs:
 842         uobj_put_write(uobj);
 843
 844         return ret;
 845 }
 846
 847 static int ib_uverbs_dereg_mr(struct uverbs_attr_bundle *attrs)
 848 {
 849         struct ib_uverbs_dereg_mr cmd;
 850         int ret;
 851
 852         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 853         if (ret)
 854                 return ret;
 855
 856         return uobj_perform_destroy(UVERBS_OBJECT_MR, cmd.mr_handle, attrs);
 857 }
 858
 859 static int ib_uverbs_alloc_mw(struct uverbs_attr_bundle *attrs)
 860 {
 861         struct ib_uverbs_alloc_mw      cmd;
 862         struct ib_uverbs_alloc_mw_resp resp;
 863         struct ib_uobject             *uobj;
 864         struct ib_pd                  *pd;
 865         struct ib_mw                  *mw;
 866         int                            ret;
 867         struct ib_device *ib_dev;
 868
 869         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 870         if (ret)
 871                 return ret;
 872
 873         uobj = uobj_alloc(UVERBS_OBJECT_MW, attrs, &ib_dev);
 874         if (IS_ERR(uobj))
 875                 return PTR_ERR(uobj);
 876
 877         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
 878         if (!pd) {
 879                 ret = -EINVAL;
 880                 goto err_free;
 881         }
 882
 883         mw = pd->device->ops.alloc_mw(pd, cmd.mw_type, &attrs->driver_udata);
 884         if (IS_ERR(mw)) {
 885                 ret = PTR_ERR(mw);
 886                 goto err_put;
 887         }
 888
 889         mw->device  = pd->device;
 890         mw->pd      = pd;
 891         mw->uobject = uobj;
 892         atomic_inc(&pd->usecnt);
 893
 894         uobj->object = mw;
 895
 896         memset(&resp, 0, sizeof(resp));
 897         resp.rkey      = mw->rkey;
 898         resp.mw_handle = uobj->id;
 899
 900         ret = uverbs_response(attrs, &resp, sizeof(resp));
 901         if (ret)
 902                 goto err_copy;
 903
 904         uobj_put_obj_read(pd);
 905         return uobj_alloc_commit(uobj);
 906
 907 err_copy:
 908         uverbs_dealloc_mw(mw);
 909 err_put:
 910         uobj_put_obj_read(pd);
 911 err_free:
 912         uobj_alloc_abort(uobj);
 913         return ret;
 914 }
 915
 916 static int ib_uverbs_dealloc_mw(struct uverbs_attr_bundle *attrs)
 917 {
 918         struct ib_uverbs_dealloc_mw cmd;
 919         int ret;
 920
 921         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 922         if (ret)
 923                 return ret;
 924
 925         return uobj_perform_destroy(UVERBS_OBJECT_MW, cmd.mw_handle, attrs);
 926 }
 927
 928 static int ib_uverbs_create_comp_channel(struct uverbs_attr_bundle *attrs)
 929 {
 930         struct ib_uverbs_create_comp_channel       cmd;
 931         struct ib_uverbs_create_comp_channel_resp  resp;
 932         struct ib_uobject                         *uobj;
 933         struct ib_uverbs_completion_event_file    *ev_file;
 934         struct ib_device *ib_dev;
 935         int ret;
 936
 937         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 938         if (ret)
 939                 return ret;
 940
 941         uobj = uobj_alloc(UVERBS_OBJECT_COMP_CHANNEL, attrs, &ib_dev);
 942         if (IS_ERR(uobj))
 943                 return PTR_ERR(uobj);
 944
 945         resp.fd = uobj->id;
 946
 947         ev_file = container_of(uobj, struct ib_uverbs_completion_event_file,
 948                                uobj);
 949         ib_uverbs_init_event_queue(&ev_file->ev_queue);
 950
 951         ret = uverbs_response(attrs, &resp, sizeof(resp));
 952         if (ret) {
 953                 uobj_alloc_abort(uobj);
 954                 return ret;
 955         }
 956
 957         return uobj_alloc_commit(uobj);
 958 }
 959
 960 static struct ib_ucq_object *create_cq(struct uverbs_attr_bundle *attrs,
 961                                        struct ib_uverbs_ex_create_cq *cmd)
 962 {
 963         struct ib_ucq_object           *obj;
 964         struct ib_uverbs_completion_event_file    *ev_file = NULL;
 965         struct ib_cq                   *cq;
 966         int                             ret;
 967         struct ib_uverbs_ex_create_cq_resp resp;
 968         struct ib_cq_init_attr attr = {};
 969         struct ib_device *ib_dev;
 970
 971         if (cmd->comp_vector >= attrs->ufile->device->num_comp_vectors)
 972                 return ERR_PTR(-EINVAL);
 973
 974         obj = (struct ib_ucq_object *)uobj_alloc(UVERBS_OBJECT_CQ, attrs,
 975                                                  &ib_dev);
 976         if (IS_ERR(obj))
 977                 return obj;
 978
 979         if (cmd->comp_channel >= 0) {
 980                 ev_file = ib_uverbs_lookup_comp_file(cmd->comp_channel, attrs);
 981                 if (IS_ERR(ev_file)) {
 982                         ret = PTR_ERR(ev_file);
 983                         goto err;
 984                 }
 985         }
 986
 987         obj->uobject.user_handle = cmd->user_handle;
 988         obj->comp_events_reported  = 0;
 989         obj->async_events_reported = 0;
 990         INIT_LIST_HEAD(&obj->comp_list);
 991         INIT_LIST_HEAD(&obj->async_list);
 992
 993         attr.cqe = cmd->cqe;
 994         attr.comp_vector = cmd->comp_vector;
 995         attr.flags = cmd->flags;
 996
 997         cq = ib_dev->ops.create_cq(ib_dev, &attr, obj->uobject.context,
 998                                    &attrs->driver_udata);
 999         if (IS_ERR(cq)) {
1000                 ret = PTR_ERR(cq);
1001                 goto err_file;
1002         }
1003
1004         cq->device        = ib_dev;
1005         cq->uobject       = &obj->uobject;
1006         cq->comp_handler  = ib_uverbs_comp_handler;
1007         cq->event_handler = ib_uverbs_cq_event_handler;
1008         cq->cq_context    = ev_file ? &ev_file->ev_queue : NULL;
1009         atomic_set(&cq->usecnt, 0);
1010
1011         obj->uobject.object = cq;
1012         memset(&resp, 0, sizeof resp);
1013         resp.base.cq_handle = obj->uobject.id;
1014         resp.base.cqe       = cq->cqe;
1015         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
1016
1017         cq->res.type = RDMA_RESTRACK_CQ;
1018         rdma_restrack_uadd(&cq->res);
1019
1020         ret = uverbs_response(attrs, &resp, sizeof(resp));
1021         if (ret)
1022                 goto err_cb;
1023
1024         ret = uobj_alloc_commit(&obj->uobject);
1025         if (ret)
1026                 return ERR_PTR(ret);
1027         return obj;
1028
1029 err_cb:
1030         ib_destroy_cq(cq);
1031
1032 err_file:
1033         if (ev_file)
1034                 ib_uverbs_release_ucq(attrs->ufile, ev_file, obj);
1035
1036 err:
1037         uobj_alloc_abort(&obj->uobject);
1038
1039         return ERR_PTR(ret);
1040 }
1041
1042 static int ib_uverbs_create_cq(struct uverbs_attr_bundle *attrs)
1043 {
1044         struct ib_uverbs_create_cq      cmd;
1045         struct ib_uverbs_ex_create_cq   cmd_ex;
1046         struct ib_ucq_object           *obj;
1047         int ret;
1048
1049         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1050         if (ret)
1051                 return ret;
1052
1053         memset(&cmd_ex, 0, sizeof(cmd_ex));
1054         cmd_ex.user_handle = cmd.user_handle;
1055         cmd_ex.cqe = cmd.cqe;
1056         cmd_ex.comp_vector = cmd.comp_vector;
1057         cmd_ex.comp_channel = cmd.comp_channel;
1058
1059         obj = create_cq(attrs, &cmd_ex);
1060         return PTR_ERR_OR_ZERO(obj);
1061 }
1062
1063 static int ib_uverbs_ex_create_cq(struct uverbs_attr_bundle *attrs)
1064 {
1065         struct ib_uverbs_ex_create_cq  cmd;
1066         struct ib_ucq_object           *obj;
1067         int ret;
1068
1069         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1070         if (ret)
1071                 return ret;
1072
1073         if (cmd.comp_mask)
1074                 return -EINVAL;
1075
1076         if (cmd.reserved)
1077                 return -EINVAL;
1078
1079         obj = create_cq(attrs, &cmd);
1080         return PTR_ERR_OR_ZERO(obj);
1081 }
1082
1083 static int ib_uverbs_resize_cq(struct uverbs_attr_bundle *attrs)
1084 {
1085         struct ib_uverbs_resize_cq      cmd;
1086         struct ib_uverbs_resize_cq_resp resp = {};
1087         struct ib_cq                    *cq;
1088         int                             ret = -EINVAL;
1089
1090         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1091         if (ret)
1092                 return ret;
1093
1094         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
1095         if (!cq)
1096                 return -EINVAL;
1097
1098         ret = cq->device->ops.resize_cq(cq, cmd.cqe, &attrs->driver_udata);
1099         if (ret)
1100                 goto out;
1101
1102         resp.cqe = cq->cqe;
1103
1104         ret = uverbs_response(attrs, &resp, sizeof(resp));
1105 out:
1106         uobj_put_obj_read(cq);
1107
1108         return ret;
1109 }
1110
1111 static int copy_wc_to_user(struct ib_device *ib_dev, void __user *dest,
1112                            struct ib_wc *wc)
1113 {
1114         struct ib_uverbs_wc tmp;
1115
1116         tmp.wr_id               = wc->wr_id;
1117         tmp.status              = wc->status;
1118         tmp.opcode              = wc->opcode;
1119         tmp.vendor_err          = wc->vendor_err;
1120         tmp.byte_len            = wc->byte_len;
1121         tmp.ex.imm_data         = wc->ex.imm_data;
1122         tmp.qp_num              = wc->qp->qp_num;
1123         tmp.src_qp              = wc->src_qp;
1124         tmp.wc_flags            = wc->wc_flags;
1125         tmp.pkey_index          = wc->pkey_index;
1126         if (rdma_cap_opa_ah(ib_dev, wc->port_num))
1127                 tmp.slid        = OPA_TO_IB_UCAST_LID(wc->slid);
1128         else
1129                 tmp.slid        = ib_lid_cpu16(wc->slid);
1130         tmp.sl                  = wc->sl;
1131         tmp.dlid_path_bits      = wc->dlid_path_bits;
1132         tmp.port_num            = wc->port_num;
1133         tmp.reserved            = 0;
1134
1135         if (copy_to_user(dest, &tmp, sizeof tmp))
1136                 return -EFAULT;
1137
1138         return 0;
1139 }
1140
1141 static int ib_uverbs_poll_cq(struct uverbs_attr_bundle *attrs)
1142 {
1143         struct ib_uverbs_poll_cq       cmd;
1144         struct ib_uverbs_poll_cq_resp  resp;
1145         u8 __user                     *header_ptr;
1146         u8 __user                     *data_ptr;
1147         struct ib_cq                  *cq;
1148         struct ib_wc                   wc;
1149         int                            ret;
1150
1151         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1152         if (ret)
1153                 return ret;
1154
1155         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
1156         if (!cq)
1157                 return -EINVAL;
1158
1159         /* we copy a struct ib_uverbs_poll_cq_resp to user space */
1160         header_ptr = attrs->ucore.outbuf;
1161         data_ptr = header_ptr + sizeof resp;
1162
1163         memset(&resp, 0, sizeof resp);
1164         while (resp.count < cmd.ne) {
1165                 ret = ib_poll_cq(cq, 1, &wc);
1166                 if (ret < 0)
1167                         goto out_put;
1168                 if (!ret)
1169                         break;
1170
1171                 ret = copy_wc_to_user(cq->device, data_ptr, &wc);
1172                 if (ret)
1173                         goto out_put;
1174
1175                 data_ptr += sizeof(struct ib_uverbs_wc);
1176                 ++resp.count;
1177         }
1178
1179         if (copy_to_user(header_ptr, &resp, sizeof resp)) {
1180                 ret = -EFAULT;
1181                 goto out_put;
1182         }
1183
1184         ret = 0;
1185
1186 out_put:
1187         uobj_put_obj_read(cq);
1188         return ret;
1189 }
1190
1191 static int ib_uverbs_req_notify_cq(struct uverbs_attr_bundle *attrs)
1192 {
1193         struct ib_uverbs_req_notify_cq cmd;
1194         struct ib_cq                  *cq;
1195         int ret;
1196
1197         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1198         if (ret)
1199                 return ret;
1200
1201         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
1202         if (!cq)
1203                 return -EINVAL;
1204
1205         ib_req_notify_cq(cq, cmd.solicited_only ?
1206                          IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
1207
1208         uobj_put_obj_read(cq);
1209
1210         return 0;
1211 }
1212
1213 static int ib_uverbs_destroy_cq(struct uverbs_attr_bundle *attrs)
1214 {
1215         struct ib_uverbs_destroy_cq      cmd;
1216         struct ib_uverbs_destroy_cq_resp resp;
1217         struct ib_uobject               *uobj;
1218         struct ib_ucq_object            *obj;
1219         int ret;
1220
1221         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1222         if (ret)
1223                 return ret;
1224
1225         uobj = uobj_get_destroy(UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
1226         if (IS_ERR(uobj))
1227                 return PTR_ERR(uobj);
1228
1229         obj = container_of(uobj, struct ib_ucq_object, uobject);
1230         memset(&resp, 0, sizeof(resp));
1231         resp.comp_events_reported  = obj->comp_events_reported;
1232         resp.async_events_reported = obj->async_events_reported;
1233
1234         uobj_put_destroy(uobj);
1235
1236         return uverbs_response(attrs, &resp, sizeof(resp));
1237 }
1238
1239 static int create_qp(struct uverbs_attr_bundle *attrs,
1240                      struct ib_uverbs_ex_create_qp *cmd)
1241 {
1242         struct ib_uqp_object            *obj;
1243         struct ib_device                *device;
1244         struct ib_pd                    *pd = NULL;
1245         struct ib_xrcd                  *xrcd = NULL;
1246         struct ib_uobject               *xrcd_uobj = ERR_PTR(-ENOENT);
1247         struct ib_cq                    *scq = NULL, *rcq = NULL;
1248         struct ib_srq                   *srq = NULL;
1249         struct ib_qp                    *qp;
1250         struct ib_qp_init_attr          attr = {};
1251         struct ib_uverbs_ex_create_qp_resp resp;
1252         int                             ret;
1253         struct ib_rwq_ind_table *ind_tbl = NULL;
1254         bool has_sq = true;
1255         struct ib_device *ib_dev;
1256
1257         if (cmd->qp_type == IB_QPT_RAW_PACKET && !capable(CAP_NET_RAW))
1258                 return -EPERM;
1259
1260         obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs,
1261                                                  &ib_dev);
1262         if (IS_ERR(obj))
1263                 return PTR_ERR(obj);
1264         obj->uxrcd = NULL;
1265         obj->uevent.uobject.user_handle = cmd->user_handle;
1266         mutex_init(&obj->mcast_lock);
1267
1268         if (cmd->comp_mask & IB_UVERBS_CREATE_QP_MASK_IND_TABLE) {
1269                 ind_tbl = uobj_get_obj_read(rwq_ind_table,
1270                                             UVERBS_OBJECT_RWQ_IND_TBL,
1271                                             cmd->rwq_ind_tbl_handle, attrs);
1272                 if (!ind_tbl) {
1273                         ret = -EINVAL;
1274                         goto err_put;
1275                 }
1276
1277                 attr.rwq_ind_tbl = ind_tbl;
1278         }
1279
1280         if (ind_tbl && (cmd->max_recv_wr || cmd->max_recv_sge || cmd->is_srq)) {
1281                 ret = -EINVAL;
1282                 goto err_put;
1283         }
1284
1285         if (ind_tbl && !cmd->max_send_wr)
1286                 has_sq = false;
1287
1288         if (cmd->qp_type == IB_QPT_XRC_TGT) {
1289                 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->pd_handle,
1290                                           attrs);
1291
1292                 if (IS_ERR(xrcd_uobj)) {
1293                         ret = -EINVAL;
1294                         goto err_put;
1295                 }
1296
1297                 xrcd = (struct ib_xrcd *)xrcd_uobj->object;
1298                 if (!xrcd) {
1299                         ret = -EINVAL;
1300                         goto err_put;
1301                 }
1302                 device = xrcd->device;
1303         } else {
1304                 if (cmd->qp_type == IB_QPT_XRC_INI) {
1305                         cmd->max_recv_wr = 0;
1306                         cmd->max_recv_sge = 0;
1307                 } else {
1308                         if (cmd->is_srq) {
1309                                 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ,
1310                                                         cmd->srq_handle, attrs);
1311                                 if (!srq || srq->srq_type == IB_SRQT_XRC) {
1312                                         ret = -EINVAL;
1313                                         goto err_put;
1314                                 }
1315                         }
1316
1317                         if (!ind_tbl) {
1318                                 if (cmd->recv_cq_handle != cmd->send_cq_handle) {
1319                                         rcq = uobj_get_obj_read(
1320                                                 cq, UVERBS_OBJECT_CQ,
1321                                                 cmd->recv_cq_handle, attrs);
1322                                         if (!rcq) {
1323                                                 ret = -EINVAL;
1324                                                 goto err_put;
1325                                         }
1326                                 }
1327                         }
1328                 }
1329
1330                 if (has_sq)
1331                         scq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ,
1332                                                 cmd->send_cq_handle, attrs);
1333                 if (!ind_tbl)
1334                         rcq = rcq ?: scq;
1335                 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle,
1336                                        attrs);
1337                 if (!pd || (!scq && has_sq)) {
1338                         ret = -EINVAL;
1339                         goto err_put;
1340                 }
1341
1342                 device = pd->device;
1343         }
1344
1345         attr.event_handler = ib_uverbs_qp_event_handler;
1346         attr.qp_context    = attrs->ufile;
1347         attr.send_cq       = scq;
1348         attr.recv_cq       = rcq;
1349         attr.srq           = srq;
1350         attr.xrcd          = xrcd;
1351         attr.sq_sig_type   = cmd->sq_sig_all ? IB_SIGNAL_ALL_WR :
1352                                               IB_SIGNAL_REQ_WR;
1353         attr.qp_type       = cmd->qp_type;
1354         attr.create_flags  = 0;
1355
1356         attr.cap.max_send_wr     = cmd->max_send_wr;
1357         attr.cap.max_recv_wr     = cmd->max_recv_wr;
1358         attr.cap.max_send_sge    = cmd->max_send_sge;
1359         attr.cap.max_recv_sge    = cmd->max_recv_sge;
1360         attr.cap.max_inline_data = cmd->max_inline_data;
1361
1362         obj->uevent.events_reported     = 0;
1363         INIT_LIST_HEAD(&obj->uevent.event_list);
1364         INIT_LIST_HEAD(&obj->mcast_list);
1365
1366         attr.create_flags = cmd->create_flags;
1367         if (attr.create_flags & ~(IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK |
1368                                 IB_QP_CREATE_CROSS_CHANNEL |
1369                                 IB_QP_CREATE_MANAGED_SEND |
1370                                 IB_QP_CREATE_MANAGED_RECV |
1371                                 IB_QP_CREATE_SCATTER_FCS |
1372                                 IB_QP_CREATE_CVLAN_STRIPPING |
1373                                 IB_QP_CREATE_SOURCE_QPN |
1374                                 IB_QP_CREATE_PCI_WRITE_END_PADDING)) {
1375                 ret = -EINVAL;
1376                 goto err_put;
1377         }
1378
1379         if (attr.create_flags & IB_QP_CREATE_SOURCE_QPN) {
1380                 if (!capable(CAP_NET_RAW)) {
1381                         ret = -EPERM;
1382                         goto err_put;
1383                 }
1384
1385                 attr.source_qpn = cmd->source_qpn;
1386         }
1387
1388         if (cmd->qp_type == IB_QPT_XRC_TGT)
1389                 qp = ib_create_qp(pd, &attr);
1390         else
1391                 qp = _ib_create_qp(device, pd, &attr, &attrs->driver_udata,
1392                                    &obj->uevent.uobject);
1393
1394         if (IS_ERR(qp)) {
1395                 ret = PTR_ERR(qp);
1396                 goto err_put;
1397         }
1398
1399         if (cmd->qp_type != IB_QPT_XRC_TGT) {
1400                 ret = ib_create_qp_security(qp, device);
1401                 if (ret)
1402                         goto err_cb;
1403
1404                 qp->real_qp       = qp;
1405                 qp->pd            = pd;
1406                 qp->send_cq       = attr.send_cq;
1407                 qp->recv_cq       = attr.recv_cq;
1408                 qp->srq           = attr.srq;
1409                 qp->rwq_ind_tbl   = ind_tbl;
1410                 qp->event_handler = attr.event_handler;
1411                 qp->qp_context    = attr.qp_context;
1412                 qp->qp_type       = attr.qp_type;
1413                 atomic_set(&qp->usecnt, 0);
1414                 atomic_inc(&pd->usecnt);
1415                 qp->port = 0;
1416                 if (attr.send_cq)
1417                         atomic_inc(&attr.send_cq->usecnt);
1418                 if (attr.recv_cq)
1419                         atomic_inc(&attr.recv_cq->usecnt);
1420                 if (attr.srq)
1421                         atomic_inc(&attr.srq->usecnt);
1422                 if (ind_tbl)
1423                         atomic_inc(&ind_tbl->usecnt);
1424         } else {
1425                 /* It is done in _ib_create_qp for other QP types */
1426                 qp->uobject = &obj->uevent.uobject;
1427         }
1428
1429         obj->uevent.uobject.object = qp;
1430
1431         memset(&resp, 0, sizeof resp);
1432         resp.base.qpn             = qp->qp_num;
1433         resp.base.qp_handle       = obj->uevent.uobject.id;
1434         resp.base.max_recv_sge    = attr.cap.max_recv_sge;
1435         resp.base.max_send_sge    = attr.cap.max_send_sge;
1436         resp.base.max_recv_wr     = attr.cap.max_recv_wr;
1437         resp.base.max_send_wr     = attr.cap.max_send_wr;
1438         resp.base.max_inline_data = attr.cap.max_inline_data;
1439         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
1440
1441         ret = uverbs_response(attrs, &resp, sizeof(resp));
1442         if (ret)
1443                 goto err_cb;
1444
1445         if (xrcd) {
1446                 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object,
1447                                           uobject);
1448                 atomic_inc(&obj->uxrcd->refcnt);
1449                 uobj_put_read(xrcd_uobj);
1450         }
1451
1452         if (pd)
1453                 uobj_put_obj_read(pd);
1454         if (scq)
1455                 uobj_put_obj_read(scq);
1456         if (rcq && rcq != scq)
1457                 uobj_put_obj_read(rcq);
1458         if (srq)
1459                 uobj_put_obj_read(srq);
1460         if (ind_tbl)
1461                 uobj_put_obj_read(ind_tbl);
1462
1463         return uobj_alloc_commit(&obj->uevent.uobject);
1464 err_cb:
1465         ib_destroy_qp(qp);
1466
1467 err_put:
1468         if (!IS_ERR(xrcd_uobj))
1469                 uobj_put_read(xrcd_uobj);
1470         if (pd)
1471                 uobj_put_obj_read(pd);
1472         if (scq)
1473                 uobj_put_obj_read(scq);
1474         if (rcq && rcq != scq)
1475                 uobj_put_obj_read(rcq);
1476         if (srq)
1477                 uobj_put_obj_read(srq);
1478         if (ind_tbl)
1479                 uobj_put_obj_read(ind_tbl);
1480
1481         uobj_alloc_abort(&obj->uevent.uobject);
1482         return ret;
1483 }
1484
1485 static int ib_uverbs_create_qp(struct uverbs_attr_bundle *attrs)
1486 {
1487         struct ib_uverbs_create_qp      cmd;
1488         struct ib_uverbs_ex_create_qp   cmd_ex;
1489         int ret;
1490
1491         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1492         if (ret)
1493                 return ret;
1494
1495         memset(&cmd_ex, 0, sizeof(cmd_ex));
1496         cmd_ex.user_handle = cmd.user_handle;
1497         cmd_ex.pd_handle = cmd.pd_handle;
1498         cmd_ex.send_cq_handle = cmd.send_cq_handle;
1499         cmd_ex.recv_cq_handle = cmd.recv_cq_handle;
1500         cmd_ex.srq_handle = cmd.srq_handle;
1501         cmd_ex.max_send_wr = cmd.max_send_wr;
1502         cmd_ex.max_recv_wr = cmd.max_recv_wr;
1503         cmd_ex.max_send_sge = cmd.max_send_sge;
1504         cmd_ex.max_recv_sge = cmd.max_recv_sge;
1505         cmd_ex.max_inline_data = cmd.max_inline_data;
1506         cmd_ex.sq_sig_all = cmd.sq_sig_all;
1507         cmd_ex.qp_type = cmd.qp_type;
1508         cmd_ex.is_srq = cmd.is_srq;
1509
1510         return create_qp(attrs, &cmd_ex);
1511 }
1512
1513 static int ib_uverbs_ex_create_qp(struct uverbs_attr_bundle *attrs)
1514 {
1515         struct ib_uverbs_ex_create_qp cmd;
1516         int ret;
1517
1518         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1519         if (ret)
1520                 return ret;
1521
1522         if (cmd.comp_mask & ~IB_UVERBS_CREATE_QP_SUP_COMP_MASK)
1523                 return -EINVAL;
1524
1525         if (cmd.reserved)
1526                 return -EINVAL;
1527
1528         return create_qp(attrs, &cmd);
1529 }
1530
1531 static int ib_uverbs_open_qp(struct uverbs_attr_bundle *attrs)
1532 {
1533         struct ib_uverbs_open_qp        cmd;
1534         struct ib_uverbs_create_qp_resp resp;
1535         struct ib_uqp_object           *obj;
1536         struct ib_xrcd                 *xrcd;
1537         struct ib_uobject              *uninitialized_var(xrcd_uobj);
1538         struct ib_qp                   *qp;
1539         struct ib_qp_open_attr          attr;
1540         int ret;
1541         struct ib_device *ib_dev;
1542
1543         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1544         if (ret)
1545                 return ret;
1546
1547         obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs,
1548                                                  &ib_dev);
1549         if (IS_ERR(obj))
1550                 return PTR_ERR(obj);
1551
1552         xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd.pd_handle, attrs);
1553         if (IS_ERR(xrcd_uobj)) {
1554                 ret = -EINVAL;
1555                 goto err_put;
1556         }
1557
1558         xrcd = (struct ib_xrcd *)xrcd_uobj->object;
1559         if (!xrcd) {
1560                 ret = -EINVAL;
1561                 goto err_xrcd;
1562         }
1563
1564         attr.event_handler = ib_uverbs_qp_event_handler;
1565         attr.qp_context    = attrs->ufile;
1566         attr.qp_num        = cmd.qpn;
1567         attr.qp_type       = cmd.qp_type;
1568
1569         obj->uevent.events_reported = 0;
1570         INIT_LIST_HEAD(&obj->uevent.event_list);
1571         INIT_LIST_HEAD(&obj->mcast_list);
1572
1573         qp = ib_open_qp(xrcd, &attr);
1574         if (IS_ERR(qp)) {
1575                 ret = PTR_ERR(qp);
1576                 goto err_xrcd;
1577         }
1578
1579         obj->uevent.uobject.object = qp;
1580         obj->uevent.uobject.user_handle = cmd.user_handle;
1581
1582         memset(&resp, 0, sizeof resp);
1583         resp.qpn       = qp->qp_num;
1584         resp.qp_handle = obj->uevent.uobject.id;
1585
1586         ret = uverbs_response(attrs, &resp, sizeof(resp));
1587         if (ret)
1588                 goto err_destroy;
1589
1590         obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
1591         atomic_inc(&obj->uxrcd->refcnt);
1592         qp->uobject = &obj->uevent.uobject;
1593         uobj_put_read(xrcd_uobj);
1594
1595         return uobj_alloc_commit(&obj->uevent.uobject);
1596
1597 err_destroy:
1598         ib_destroy_qp(qp);
1599 err_xrcd:
1600         uobj_put_read(xrcd_uobj);
1601 err_put:
1602         uobj_alloc_abort(&obj->uevent.uobject);
1603         return ret;
1604 }
1605
1606 static void copy_ah_attr_to_uverbs(struct ib_uverbs_qp_dest *uverb_attr,
1607                                    struct rdma_ah_attr *rdma_attr)
1608 {
1609         const struct ib_global_route   *grh;
1610
1611         uverb_attr->dlid              = rdma_ah_get_dlid(rdma_attr);
1612         uverb_attr->sl                = rdma_ah_get_sl(rdma_attr);
1613         uverb_attr->src_path_bits     = rdma_ah_get_path_bits(rdma_attr);
1614         uverb_attr->static_rate       = rdma_ah_get_static_rate(rdma_attr);
1615         uverb_attr->is_global         = !!(rdma_ah_get_ah_flags(rdma_attr) &
1616                                          IB_AH_GRH);
1617         if (uverb_attr->is_global) {
1618                 grh = rdma_ah_read_grh(rdma_attr);
1619                 memcpy(uverb_attr->dgid, grh->dgid.raw, 16);
1620                 uverb_attr->flow_label        = grh->flow_label;
1621                 uverb_attr->sgid_index        = grh->sgid_index;
1622                 uverb_attr->hop_limit         = grh->hop_limit;
1623                 uverb_attr->traffic_class     = grh->traffic_class;
1624         }
1625         uverb_attr->port_num          = rdma_ah_get_port_num(rdma_attr);
1626 }
1627
1628 static int ib_uverbs_query_qp(struct uverbs_attr_bundle *attrs)
1629 {
1630         struct ib_uverbs_query_qp      cmd;
1631         struct ib_uverbs_query_qp_resp resp;
1632         struct ib_qp                   *qp;
1633         struct ib_qp_attr              *attr;
1634         struct ib_qp_init_attr         *init_attr;
1635         int                            ret;
1636
1637         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1638         if (ret)
1639                 return ret;
1640
1641         attr      = kmalloc(sizeof *attr, GFP_KERNEL);
1642         init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1643         if (!attr || !init_attr) {
1644                 ret = -ENOMEM;
1645                 goto out;
1646         }
1647
1648         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
1649         if (!qp) {
1650                 ret = -EINVAL;
1651                 goto out;
1652         }
1653
1654         ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1655
1656         uobj_put_obj_read(qp);
1657
1658         if (ret)
1659                 goto out;
1660
1661         memset(&resp, 0, sizeof resp);
1662
1663         resp.qp_state               = attr->qp_state;
1664         resp.cur_qp_state           = attr->cur_qp_state;
1665         resp.path_mtu               = attr->path_mtu;
1666         resp.path_mig_state         = attr->path_mig_state;
1667         resp.qkey                   = attr->qkey;
1668         resp.rq_psn                 = attr->rq_psn;
1669         resp.sq_psn                 = attr->sq_psn;
1670         resp.dest_qp_num            = attr->dest_qp_num;
1671         resp.qp_access_flags        = attr->qp_access_flags;
1672         resp.pkey_index             = attr->pkey_index;
1673         resp.alt_pkey_index         = attr->alt_pkey_index;
1674         resp.sq_draining            = attr->sq_draining;
1675         resp.max_rd_atomic          = attr->max_rd_atomic;
1676         resp.max_dest_rd_atomic     = attr->max_dest_rd_atomic;
1677         resp.min_rnr_timer          = attr->min_rnr_timer;
1678         resp.port_num               = attr->port_num;
1679         resp.timeout                = attr->timeout;
1680         resp.retry_cnt              = attr->retry_cnt;
1681         resp.rnr_retry              = attr->rnr_retry;
1682         resp.alt_port_num           = attr->alt_port_num;
1683         resp.alt_timeout            = attr->alt_timeout;
1684
1685         copy_ah_attr_to_uverbs(&resp.dest, &attr->ah_attr);
1686         copy_ah_attr_to_uverbs(&resp.alt_dest, &attr->alt_ah_attr);
1687
1688         resp.max_send_wr            = init_attr->cap.max_send_wr;
1689         resp.max_recv_wr            = init_attr->cap.max_recv_wr;
1690         resp.max_send_sge           = init_attr->cap.max_send_sge;
1691         resp.max_recv_sge           = init_attr->cap.max_recv_sge;
1692         resp.max_inline_data        = init_attr->cap.max_inline_data;
1693         resp.sq_sig_all             = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1694
1695         ret = uverbs_response(attrs, &resp, sizeof(resp));
1696
1697 out:
1698         kfree(attr);
1699         kfree(init_attr);
1700
1701         return ret;
1702 }
1703
1704 /* Remove ignored fields set in the attribute mask */
1705 static int modify_qp_mask(enum ib_qp_type qp_type, int mask)
1706 {
1707         switch (qp_type) {
1708         case IB_QPT_XRC_INI:
1709                 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER);
1710         case IB_QPT_XRC_TGT:
1711                 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT |
1712                                 IB_QP_RNR_RETRY);
1713         default:
1714                 return mask;
1715         }
1716 }
1717
1718 static void copy_ah_attr_from_uverbs(struct ib_device *dev,
1719                                      struct rdma_ah_attr *rdma_attr,
1720                                      struct ib_uverbs_qp_dest *uverb_attr)
1721 {
1722         rdma_attr->type = rdma_ah_find_type(dev, uverb_attr->port_num);
1723         if (uverb_attr->is_global) {
1724                 rdma_ah_set_grh(rdma_attr, NULL,
1725                                 uverb_attr->flow_label,
1726                                 uverb_attr->sgid_index,
1727                                 uverb_attr->hop_limit,
1728                                 uverb_attr->traffic_class);
1729                 rdma_ah_set_dgid_raw(rdma_attr, uverb_attr->dgid);
1730         } else {
1731                 rdma_ah_set_ah_flags(rdma_attr, 0);
1732         }
1733         rdma_ah_set_dlid(rdma_attr, uverb_attr->dlid);
1734         rdma_ah_set_sl(rdma_attr, uverb_attr->sl);
1735         rdma_ah_set_path_bits(rdma_attr, uverb_attr->src_path_bits);
1736         rdma_ah_set_static_rate(rdma_attr, uverb_attr->static_rate);
1737         rdma_ah_set_port_num(rdma_attr, uverb_attr->port_num);
1738         rdma_ah_set_make_grd(rdma_attr, false);
1739 }
1740
1741 static int modify_qp(struct uverbs_attr_bundle *attrs,
1742                      struct ib_uverbs_ex_modify_qp *cmd)
1743 {
1744         struct ib_qp_attr *attr;
1745         struct ib_qp *qp;
1746         int ret;
1747
1748         attr = kzalloc(sizeof(*attr), GFP_KERNEL);
1749         if (!attr)
1750                 return -ENOMEM;
1751
1752         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd->base.qp_handle,
1753                                attrs);
1754         if (!qp) {
1755                 ret = -EINVAL;
1756                 goto out;
1757         }
1758
1759         if ((cmd->base.attr_mask & IB_QP_PORT) &&
1760             !rdma_is_port_valid(qp->device, cmd->base.port_num)) {
1761                 ret = -EINVAL;
1762                 goto release_qp;
1763         }
1764
1765         if ((cmd->base.attr_mask & IB_QP_AV)) {
1766                 if (!rdma_is_port_valid(qp->device, cmd->base.dest.port_num)) {
1767                         ret = -EINVAL;
1768                         goto release_qp;
1769                 }
1770
1771                 if (cmd->base.attr_mask & IB_QP_STATE &&
1772                     cmd->base.qp_state == IB_QPS_RTR) {
1773                 /* We are in INIT->RTR TRANSITION (if we are not,
1774                  * this transition will be rejected in subsequent checks).
1775                  * In the INIT->RTR transition, we cannot have IB_QP_PORT set,
1776                  * but the IB_QP_STATE flag is required.
1777                  *
1778                  * Since kernel 3.14 (commit dbf727de7440), the uverbs driver,
1779                  * when IB_QP_AV is set, has required inclusion of a valid
1780                  * port number in the primary AV. (AVs are created and handled
1781                  * differently for infiniband and ethernet (RoCE) ports).
1782                  *
1783                  * Check the port number included in the primary AV against
1784                  * the port number in the qp struct, which was set (and saved)
1785                  * in the RST->INIT transition.
1786                  */
1787                         if (cmd->base.dest.port_num != qp->real_qp->port) {
1788                                 ret = -EINVAL;
1789                                 goto release_qp;
1790                         }
1791                 } else {
1792                 /* We are in SQD->SQD. (If we are not, this transition will
1793                  * be rejected later in the verbs layer checks).
1794                  * Check for both IB_QP_PORT and IB_QP_AV, these can be set
1795                  * together in the SQD->SQD transition.
1796                  *
1797                  * If only IP_QP_AV was set, add in IB_QP_PORT as well (the
1798                  * verbs layer driver does not track primary port changes
1799                  * resulting from path migration. Thus, in SQD, if the primary
1800                  * AV is modified, the primary port should also be modified).
1801                  *
1802                  * Note that in this transition, the IB_QP_STATE flag
1803                  * is not allowed.
1804                  */
1805                         if (((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT))
1806                              == (IB_QP_AV | IB_QP_PORT)) &&
1807                             cmd->base.port_num != cmd->base.dest.port_num) {
1808                                 ret = -EINVAL;
1809                                 goto release_qp;
1810                         }
1811                         if ((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT))
1812                             == IB_QP_AV) {
1813                                 cmd->base.attr_mask |= IB_QP_PORT;
1814                                 cmd->base.port_num = cmd->base.dest.port_num;
1815                         }
1816                 }
1817         }
1818
1819         if ((cmd->base.attr_mask & IB_QP_ALT_PATH) &&
1820             (!rdma_is_port_valid(qp->device, cmd->base.alt_port_num) ||
1821             !rdma_is_port_valid(qp->device, cmd->base.alt_dest.port_num) ||
1822             cmd->base.alt_port_num != cmd->base.alt_dest.port_num)) {
1823                 ret = -EINVAL;
1824                 goto release_qp;
1825         }
1826
1827         if ((cmd->base.attr_mask & IB_QP_CUR_STATE &&
1828             cmd->base.cur_qp_state > IB_QPS_ERR) ||
1829             (cmd->base.attr_mask & IB_QP_STATE &&
1830             cmd->base.qp_state > IB_QPS_ERR)) {
1831                 ret = -EINVAL;
1832                 goto release_qp;
1833         }
1834
1835         if (cmd->base.attr_mask & IB_QP_STATE)
1836                 attr->qp_state = cmd->base.qp_state;
1837         if (cmd->base.attr_mask & IB_QP_CUR_STATE)
1838                 attr->cur_qp_state = cmd->base.cur_qp_state;
1839         if (cmd->base.attr_mask & IB_QP_PATH_MTU)
1840                 attr->path_mtu = cmd->base.path_mtu;
1841         if (cmd->base.attr_mask & IB_QP_PATH_MIG_STATE)
1842                 attr->path_mig_state = cmd->base.path_mig_state;
1843         if (cmd->base.attr_mask & IB_QP_QKEY)
1844                 attr->qkey = cmd->base.qkey;
1845         if (cmd->base.attr_mask & IB_QP_RQ_PSN)
1846                 attr->rq_psn = cmd->base.rq_psn;
1847         if (cmd->base.attr_mask & IB_QP_SQ_PSN)
1848                 attr->sq_psn = cmd->base.sq_psn;
1849         if (cmd->base.attr_mask & IB_QP_DEST_QPN)
1850                 attr->dest_qp_num = cmd->base.dest_qp_num;
1851         if (cmd->base.attr_mask & IB_QP_ACCESS_FLAGS)
1852                 attr->qp_access_flags = cmd->base.qp_access_flags;
1853         if (cmd->base.attr_mask & IB_QP_PKEY_INDEX)
1854                 attr->pkey_index = cmd->base.pkey_index;
1855         if (cmd->base.attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY)
1856                 attr->en_sqd_async_notify = cmd->base.en_sqd_async_notify;
1857         if (cmd->base.attr_mask & IB_QP_MAX_QP_RD_ATOMIC)
1858                 attr->max_rd_atomic = cmd->base.max_rd_atomic;
1859         if (cmd->base.attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
1860                 attr->max_dest_rd_atomic = cmd->base.max_dest_rd_atomic;
1861         if (cmd->base.attr_mask & IB_QP_MIN_RNR_TIMER)
1862                 attr->min_rnr_timer = cmd->base.min_rnr_timer;
1863         if (cmd->base.attr_mask & IB_QP_PORT)
1864                 attr->port_num = cmd->base.port_num;
1865         if (cmd->base.attr_mask & IB_QP_TIMEOUT)
1866                 attr->timeout = cmd->base.timeout;
1867         if (cmd->base.attr_mask & IB_QP_RETRY_CNT)
1868                 attr->retry_cnt = cmd->base.retry_cnt;
1869         if (cmd->base.attr_mask & IB_QP_RNR_RETRY)
1870                 attr->rnr_retry = cmd->base.rnr_retry;
1871         if (cmd->base.attr_mask & IB_QP_ALT_PATH) {
1872                 attr->alt_port_num = cmd->base.alt_port_num;
1873                 attr->alt_timeout = cmd->base.alt_timeout;
1874                 attr->alt_pkey_index = cmd->base.alt_pkey_index;
1875         }
1876         if (cmd->base.attr_mask & IB_QP_RATE_LIMIT)
1877                 attr->rate_limit = cmd->rate_limit;
1878
1879         if (cmd->base.attr_mask & IB_QP_AV)
1880                 copy_ah_attr_from_uverbs(qp->device, &attr->ah_attr,
1881                                          &cmd->base.dest);
1882
1883         if (cmd->base.attr_mask & IB_QP_ALT_PATH)
1884                 copy_ah_attr_from_uverbs(qp->device, &attr->alt_ah_attr,
1885                                          &cmd->base.alt_dest);
1886
1887         ret = ib_modify_qp_with_udata(qp, attr,
1888                                       modify_qp_mask(qp->qp_type,
1889                                                      cmd->base.attr_mask),
1890                                       &attrs->driver_udata);
1891
1892 release_qp:
1893         uobj_put_obj_read(qp);
1894 out:
1895         kfree(attr);
1896
1897         return ret;
1898 }
1899
1900 static int ib_uverbs_modify_qp(struct uverbs_attr_bundle *attrs)
1901 {
1902         struct ib_uverbs_ex_modify_qp cmd;
1903         int ret;
1904
1905         ret = uverbs_request(attrs, &cmd.base, sizeof(cmd.base));
1906         if (ret)
1907                 return ret;
1908
1909         if (cmd.base.attr_mask &
1910             ~((IB_USER_LEGACY_LAST_QP_ATTR_MASK << 1) - 1))
1911                 return -EOPNOTSUPP;
1912
1913         return modify_qp(attrs, &cmd);
1914 }
1915
1916 static int ib_uverbs_ex_modify_qp(struct uverbs_attr_bundle *attrs)
1917 {
1918         struct ib_uverbs_ex_modify_qp cmd;
1919         struct ib_uverbs_ex_modify_qp_resp resp = {
1920                 .response_length = uverbs_response_length(attrs, sizeof(resp))
1921         };
1922         int ret;
1923
1924         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1925         if (ret)
1926                 return ret;
1927
1928         /*
1929          * Last bit is reserved for extending the attr_mask by
1930          * using another field.
1931          */
1932         BUILD_BUG_ON(IB_USER_LAST_QP_ATTR_MASK == (1 << 31));
1933
1934         if (cmd.base.attr_mask &
1935             ~((IB_USER_LAST_QP_ATTR_MASK << 1) - 1))
1936                 return -EOPNOTSUPP;
1937
1938         ret = modify_qp(attrs, &cmd);
1939         if (ret)
1940                 return ret;
1941
1942         return uverbs_response(attrs, &resp, sizeof(resp));
1943 }
1944
1945 static int ib_uverbs_destroy_qp(struct uverbs_attr_bundle *attrs)
1946 {
1947         struct ib_uverbs_destroy_qp      cmd;
1948         struct ib_uverbs_destroy_qp_resp resp;
1949         struct ib_uobject               *uobj;
1950         struct ib_uqp_object            *obj;
1951         int ret;
1952
1953         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1954         if (ret)
1955                 return ret;
1956
1957         uobj = uobj_get_destroy(UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
1958         if (IS_ERR(uobj))
1959                 return PTR_ERR(uobj);
1960
1961         obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
1962         memset(&resp, 0, sizeof(resp));
1963         resp.events_reported = obj->uevent.events_reported;
1964
1965         uobj_put_destroy(uobj);
1966
1967         return uverbs_response(attrs, &resp, sizeof(resp));
1968 }
1969
1970 static void *alloc_wr(size_t wr_size, __u32 num_sge)
1971 {
1972         if (num_sge >= (U32_MAX - ALIGN(wr_size, sizeof (struct ib_sge))) /
1973                        sizeof (struct ib_sge))
1974                 return NULL;
1975
1976         return kmalloc(ALIGN(wr_size, sizeof (struct ib_sge)) +
1977                          num_sge * sizeof (struct ib_sge), GFP_KERNEL);
1978 }
1979
1980 static int ib_uverbs_post_send(struct uverbs_attr_bundle *attrs)
1981 {
1982         struct ib_uverbs_post_send      cmd;
1983         struct ib_uverbs_post_send_resp resp;
1984         struct ib_uverbs_send_wr       *user_wr;
1985         struct ib_send_wr              *wr = NULL, *last, *next;
1986         const struct ib_send_wr        *bad_wr;
1987         struct ib_qp                   *qp;
1988         int                             i, sg_ind;
1989         int                             is_ud;
1990         int ret, ret2;
1991         size_t                          next_size;
1992         const struct ib_sge __user *sgls;
1993         const void __user *wqes;
1994         struct uverbs_req_iter iter;
1995
1996         ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
1997         if (ret)
1998                 return ret;
1999         wqes = uverbs_request_next_ptr(&iter, cmd.wqe_size * cmd.wr_count);
2000         if (IS_ERR(wqes))
2001                 return PTR_ERR(wqes);
2002         sgls = uverbs_request_next_ptr(
2003                 &iter, cmd.sge_count * sizeof(struct ib_uverbs_sge));
2004         if (IS_ERR(sgls))
2005                 return PTR_ERR(sgls);
2006         ret = uverbs_request_finish(&iter);
2007         if (ret)
2008                 return ret;
2009
2010         user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
2011         if (!user_wr)
2012                 return -ENOMEM;
2013
2014         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2015         if (!qp) {
2016                 ret = -EINVAL;
2017                 goto out;
2018         }
2019
2020         is_ud = qp->qp_type == IB_QPT_UD;
2021         sg_ind = 0;
2022         last = NULL;
2023         for (i = 0; i < cmd.wr_count; ++i) {
2024                 if (copy_from_user(user_wr, wqes + i * cmd.wqe_size,
2025                                    cmd.wqe_size)) {
2026                         ret = -EFAULT;
2027                         goto out_put;
2028                 }
2029
2030                 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
2031                         ret = -EINVAL;
2032                         goto out_put;
2033                 }
2034
2035                 if (is_ud) {
2036                         struct ib_ud_wr *ud;
2037
2038                         if (user_wr->opcode != IB_WR_SEND &&
2039                             user_wr->opcode != IB_WR_SEND_WITH_IMM) {
2040                                 ret = -EINVAL;
2041                                 goto out_put;
2042                         }
2043
2044                         next_size = sizeof(*ud);
2045                         ud = alloc_wr(next_size, user_wr->num_sge);
2046                         if (!ud) {
2047                                 ret = -ENOMEM;
2048                                 goto out_put;
2049                         }
2050
2051                         ud->ah = uobj_get_obj_read(ah, UVERBS_OBJECT_AH,
2052                                                    user_wr->wr.ud.ah, attrs);
2053                         if (!ud->ah) {
2054                                 kfree(ud);
2055                                 ret = -EINVAL;
2056                                 goto out_put;
2057                         }
2058                         ud->remote_qpn = user_wr->wr.ud.remote_qpn;
2059                         ud->remote_qkey = user_wr->wr.ud.remote_qkey;
2060
2061                         next = &ud->wr;
2062                 } else if (user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM ||
2063                            user_wr->opcode == IB_WR_RDMA_WRITE ||
2064                            user_wr->opcode == IB_WR_RDMA_READ) {
2065                         struct ib_rdma_wr *rdma;
2066
2067                         next_size = sizeof(*rdma);
2068                         rdma = alloc_wr(next_size, user_wr->num_sge);
2069                         if (!rdma) {
2070                                 ret = -ENOMEM;
2071                                 goto out_put;
2072                         }
2073
2074                         rdma->remote_addr = user_wr->wr.rdma.remote_addr;
2075                         rdma->rkey = user_wr->wr.rdma.rkey;
2076
2077                         next = &rdma->wr;
2078                 } else if (user_wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP ||
2079                            user_wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) {
2080                         struct ib_atomic_wr *atomic;
2081
2082                         next_size = sizeof(*atomic);
2083                         atomic = alloc_wr(next_size, user_wr->num_sge);
2084                         if (!atomic) {
2085                                 ret = -ENOMEM;
2086                                 goto out_put;
2087                         }
2088
2089                         atomic->remote_addr = user_wr->wr.atomic.remote_addr;
2090                         atomic->compare_add = user_wr->wr.atomic.compare_add;
2091                         atomic->swap = user_wr->wr.atomic.swap;
2092                         atomic->rkey = user_wr->wr.atomic.rkey;
2093
2094                         next = &atomic->wr;
2095                 } else if (user_wr->opcode == IB_WR_SEND ||
2096                            user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2097                            user_wr->opcode == IB_WR_SEND_WITH_INV) {
2098                         next_size = sizeof(*next);
2099                         next = alloc_wr(next_size, user_wr->num_sge);
2100                         if (!next) {
2101                                 ret = -ENOMEM;
2102                                 goto out_put;
2103                         }
2104                 } else {
2105                         ret = -EINVAL;
2106                         goto out_put;
2107                 }
2108
2109                 if (user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2110                     user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) {
2111                         next->ex.imm_data =
2112                                         (__be32 __force) user_wr->ex.imm_data;
2113                 } else if (user_wr->opcode == IB_WR_SEND_WITH_INV) {
2114                         next->ex.invalidate_rkey = user_wr->ex.invalidate_rkey;
2115                 }
2116
2117                 if (!last)
2118                         wr = next;
2119                 else
2120                         last->next = next;
2121                 last = next;
2122
2123                 next->next       = NULL;
2124                 next->wr_id      = user_wr->wr_id;
2125                 next->num_sge    = user_wr->num_sge;
2126                 next->opcode     = user_wr->opcode;
2127                 next->send_flags = user_wr->send_flags;
2128
2129                 if (next->num_sge) {
2130                         next->sg_list = (void *) next +
2131                                 ALIGN(next_size, sizeof(struct ib_sge));
2132                         if (copy_from_user(next->sg_list, sgls + sg_ind,
2133                                            next->num_sge *
2134                                                    sizeof(struct ib_sge))) {
2135                                 ret = -EFAULT;
2136                                 goto out_put;
2137                         }
2138                         sg_ind += next->num_sge;
2139                 } else
2140                         next->sg_list = NULL;
2141         }
2142
2143         resp.bad_wr = 0;
2144         ret = qp->device->ops.post_send(qp->real_qp, wr, &bad_wr);
2145         if (ret)
2146                 for (next = wr; next; next = next->next) {
2147                         ++resp.bad_wr;
2148                         if (next == bad_wr)
2149                                 break;
2150                 }
2151
2152         ret2 = uverbs_response(attrs, &resp, sizeof(resp));
2153         if (ret2)
2154                 ret = ret2;
2155
2156 out_put:
2157         uobj_put_obj_read(qp);
2158
2159         while (wr) {
2160                 if (is_ud && ud_wr(wr)->ah)
2161                         uobj_put_obj_read(ud_wr(wr)->ah);
2162                 next = wr->next;
2163                 kfree(wr);
2164                 wr = next;
2165         }
2166
2167 out:
2168         kfree(user_wr);
2169
2170         return ret;
2171 }
2172
2173 static struct ib_recv_wr *
2174 ib_uverbs_unmarshall_recv(struct uverbs_req_iter *iter, u32 wr_count,
2175                           u32 wqe_size, u32 sge_count)
2176 {
2177         struct ib_uverbs_recv_wr *user_wr;
2178         struct ib_recv_wr        *wr = NULL, *last, *next;
2179         int                       sg_ind;
2180         int                       i;
2181         int                       ret;
2182         const struct ib_sge __user *sgls;
2183         const void __user *wqes;
2184
2185         if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
2186                 return ERR_PTR(-EINVAL);
2187
2188         wqes = uverbs_request_next_ptr(iter, wqe_size * wr_count);
2189         if (IS_ERR(wqes))
2190                 return ERR_CAST(wqes);
2191         sgls = uverbs_request_next_ptr(
2192                 iter, sge_count * sizeof(struct ib_uverbs_sge));
2193         if (IS_ERR(sgls))
2194                 return ERR_CAST(sgls);
2195         ret = uverbs_request_finish(iter);
2196         if (ret)
2197                 return ERR_PTR(ret);
2198
2199         user_wr = kmalloc(wqe_size, GFP_KERNEL);
2200         if (!user_wr)
2201                 return ERR_PTR(-ENOMEM);
2202
2203         sg_ind = 0;
2204         last = NULL;
2205         for (i = 0; i < wr_count; ++i) {
2206                 if (copy_from_user(user_wr, wqes + i * wqe_size,
2207                                    wqe_size)) {
2208                         ret = -EFAULT;
2209                         goto err;
2210                 }
2211
2212                 if (user_wr->num_sge + sg_ind > sge_count) {
2213                         ret = -EINVAL;
2214                         goto err;
2215                 }
2216
2217                 if (user_wr->num_sge >=
2218                     (U32_MAX - ALIGN(sizeof *next, sizeof (struct ib_sge))) /
2219                     sizeof (struct ib_sge)) {
2220                         ret = -EINVAL;
2221                         goto err;
2222                 }
2223
2224                 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2225                                user_wr->num_sge * sizeof (struct ib_sge),
2226                                GFP_KERNEL);
2227                 if (!next) {
2228                         ret = -ENOMEM;
2229                         goto err;
2230                 }
2231
2232                 if (!last)
2233                         wr = next;
2234                 else
2235                         last->next = next;
2236                 last = next;
2237
2238                 next->next       = NULL;
2239                 next->wr_id      = user_wr->wr_id;
2240                 next->num_sge    = user_wr->num_sge;
2241
2242                 if (next->num_sge) {
2243                         next->sg_list = (void *) next +
2244                                 ALIGN(sizeof *next, sizeof (struct ib_sge));
2245                         if (copy_from_user(next->sg_list, sgls + sg_ind,
2246                                            next->num_sge *
2247                                                    sizeof(struct ib_sge))) {
2248                                 ret = -EFAULT;
2249                                 goto err;
2250                         }
2251                         sg_ind += next->num_sge;
2252                 } else
2253                         next->sg_list = NULL;
2254         }
2255
2256         kfree(user_wr);
2257         return wr;
2258
2259 err:
2260         kfree(user_wr);
2261
2262         while (wr) {
2263                 next = wr->next;
2264                 kfree(wr);
2265                 wr = next;
2266         }
2267
2268         return ERR_PTR(ret);
2269 }
2270
2271 static int ib_uverbs_post_recv(struct uverbs_attr_bundle *attrs)
2272 {
2273         struct ib_uverbs_post_recv      cmd;
2274         struct ib_uverbs_post_recv_resp resp;
2275         struct ib_recv_wr              *wr, *next;
2276         const struct ib_recv_wr        *bad_wr;
2277         struct ib_qp                   *qp;
2278         int ret, ret2;
2279         struct uverbs_req_iter iter;
2280
2281         ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
2282         if (ret)
2283                 return ret;
2284
2285         wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size,
2286                                        cmd.sge_count);
2287         if (IS_ERR(wr))
2288                 return PTR_ERR(wr);
2289
2290         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2291         if (!qp) {
2292                 ret = -EINVAL;
2293                 goto out;
2294         }
2295
2296         resp.bad_wr = 0;
2297         ret = qp->device->ops.post_recv(qp->real_qp, wr, &bad_wr);
2298
2299         uobj_put_obj_read(qp);
2300         if (ret) {
2301                 for (next = wr; next; next = next->next) {
2302                         ++resp.bad_wr;
2303                         if (next == bad_wr)
2304                                 break;
2305                 }
2306         }
2307
2308         ret2 = uverbs_response(attrs, &resp, sizeof(resp));
2309         if (ret2)
2310                 ret = ret2;
2311 out:
2312         while (wr) {
2313                 next = wr->next;
2314                 kfree(wr);
2315                 wr = next;
2316         }
2317
2318         return ret;
2319 }
2320
2321 static int ib_uverbs_post_srq_recv(struct uverbs_attr_bundle *attrs)
2322 {
2323         struct ib_uverbs_post_srq_recv      cmd;
2324         struct ib_uverbs_post_srq_recv_resp resp;
2325         struct ib_recv_wr                  *wr, *next;
2326         const struct ib_recv_wr            *bad_wr;
2327         struct ib_srq                      *srq;
2328         int ret, ret2;
2329         struct uverbs_req_iter iter;
2330
2331         ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
2332         if (ret)
2333                 return ret;
2334
2335         wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size,
2336                                        cmd.sge_count);
2337         if (IS_ERR(wr))
2338                 return PTR_ERR(wr);
2339
2340         srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
2341         if (!srq) {
2342                 ret = -EINVAL;
2343                 goto out;
2344         }
2345
2346         resp.bad_wr = 0;
2347         ret = srq->device->ops.post_srq_recv(srq, wr, &bad_wr);
2348
2349         uobj_put_obj_read(srq);
2350
2351         if (ret)
2352                 for (next = wr; next; next = next->next) {
2353                         ++resp.bad_wr;
2354                         if (next == bad_wr)
2355                                 break;
2356                 }
2357
2358         ret2 = uverbs_response(attrs, &resp, sizeof(resp));
2359         if (ret2)
2360                 ret = ret2;
2361
2362 out:
2363         while (wr) {
2364                 next = wr->next;
2365                 kfree(wr);
2366                 wr = next;
2367         }
2368
2369         return ret;
2370 }
2371
2372 static int ib_uverbs_create_ah(struct uverbs_attr_bundle *attrs)
2373 {
2374         struct ib_uverbs_create_ah       cmd;
2375         struct ib_uverbs_create_ah_resp  resp;
2376         struct ib_uobject               *uobj;
2377         struct ib_pd                    *pd;
2378         struct ib_ah                    *ah;
2379         struct rdma_ah_attr             attr = {};
2380         int ret;
2381         struct ib_device *ib_dev;
2382
2383         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2384         if (ret)
2385                 return ret;
2386
2387         uobj = uobj_alloc(UVERBS_OBJECT_AH, attrs, &ib_dev);
2388         if (IS_ERR(uobj))
2389                 return PTR_ERR(uobj);
2390
2391         if (!rdma_is_port_valid(ib_dev, cmd.attr.port_num)) {
2392                 ret = -EINVAL;
2393                 goto err;
2394         }
2395
2396         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
2397         if (!pd) {
2398                 ret = -EINVAL;
2399                 goto err;
2400         }
2401
2402         attr.type = rdma_ah_find_type(ib_dev, cmd.attr.port_num);
2403         rdma_ah_set_make_grd(&attr, false);
2404         rdma_ah_set_dlid(&attr, cmd.attr.dlid);
2405         rdma_ah_set_sl(&attr, cmd.attr.sl);
2406         rdma_ah_set_path_bits(&attr, cmd.attr.src_path_bits);
2407         rdma_ah_set_static_rate(&attr, cmd.attr.static_rate);
2408         rdma_ah_set_port_num(&attr, cmd.attr.port_num);
2409
2410         if (cmd.attr.is_global) {
2411                 rdma_ah_set_grh(&attr, NULL, cmd.attr.grh.flow_label,
2412                                 cmd.attr.grh.sgid_index,
2413                                 cmd.attr.grh.hop_limit,
2414                                 cmd.attr.grh.traffic_class);
2415                 rdma_ah_set_dgid_raw(&attr, cmd.attr.grh.dgid);
2416         } else {
2417                 rdma_ah_set_ah_flags(&attr, 0);
2418         }
2419
2420         ah = rdma_create_user_ah(pd, &attr, &attrs->driver_udata);
2421         if (IS_ERR(ah)) {
2422                 ret = PTR_ERR(ah);
2423                 goto err_put;
2424         }
2425
2426         ah->uobject  = uobj;
2427         uobj->user_handle = cmd.user_handle;
2428         uobj->object = ah;
2429
2430         resp.ah_handle = uobj->id;
2431
2432         ret = uverbs_response(attrs, &resp, sizeof(resp));
2433         if (ret)
2434                 goto err_copy;
2435
2436         uobj_put_obj_read(pd);
2437         return uobj_alloc_commit(uobj);
2438
2439 err_copy:
2440         rdma_destroy_ah(ah, RDMA_DESTROY_AH_SLEEPABLE);
2441
2442 err_put:
2443         uobj_put_obj_read(pd);
2444
2445 err:
2446         uobj_alloc_abort(uobj);
2447         return ret;
2448 }
2449
2450 static int ib_uverbs_destroy_ah(struct uverbs_attr_bundle *attrs)
2451 {
2452         struct ib_uverbs_destroy_ah cmd;
2453         int ret;
2454
2455         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2456         if (ret)
2457                 return ret;
2458
2459         return uobj_perform_destroy(UVERBS_OBJECT_AH, cmd.ah_handle, attrs);
2460 }
2461
2462 static int ib_uverbs_attach_mcast(struct uverbs_attr_bundle *attrs)
2463 {
2464         struct ib_uverbs_attach_mcast cmd;
2465         struct ib_qp                 *qp;
2466         struct ib_uqp_object         *obj;
2467         struct ib_uverbs_mcast_entry *mcast;
2468         int                           ret;
2469
2470         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2471         if (ret)
2472                 return ret;
2473
2474         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2475         if (!qp)
2476                 return -EINVAL;
2477
2478         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2479
2480         mutex_lock(&obj->mcast_lock);
2481         list_for_each_entry(mcast, &obj->mcast_list, list)
2482                 if (cmd.mlid == mcast->lid &&
2483                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2484                         ret = 0;
2485                         goto out_put;
2486                 }
2487
2488         mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
2489         if (!mcast) {
2490                 ret = -ENOMEM;
2491                 goto out_put;
2492         }
2493
2494         mcast->lid = cmd.mlid;
2495         memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
2496
2497         ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
2498         if (!ret)
2499                 list_add_tail(&mcast->list, &obj->mcast_list);
2500         else
2501                 kfree(mcast);
2502
2503 out_put:
2504         mutex_unlock(&obj->mcast_lock);
2505         uobj_put_obj_read(qp);
2506
2507         return ret;
2508 }
2509
2510 static int ib_uverbs_detach_mcast(struct uverbs_attr_bundle *attrs)
2511 {
2512         struct ib_uverbs_detach_mcast cmd;
2513         struct ib_uqp_object         *obj;
2514         struct ib_qp                 *qp;
2515         struct ib_uverbs_mcast_entry *mcast;
2516         int                           ret = -EINVAL;
2517         bool                          found = false;
2518
2519         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2520         if (ret)
2521                 return ret;
2522
2523         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2524         if (!qp)
2525                 return -EINVAL;
2526
2527         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2528         mutex_lock(&obj->mcast_lock);
2529
2530         list_for_each_entry(mcast, &obj->mcast_list, list)
2531                 if (cmd.mlid == mcast->lid &&
2532                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2533                         list_del(&mcast->list);
2534                         kfree(mcast);
2535                         found = true;
2536                         break;
2537                 }
2538
2539         if (!found) {
2540                 ret = -EINVAL;
2541                 goto out_put;
2542         }
2543
2544         ret = ib_detach_mcast(qp, (union ib_gid *)cmd.gid, cmd.mlid);
2545
2546 out_put:
2547         mutex_unlock(&obj->mcast_lock);
2548         uobj_put_obj_read(qp);
2549         return ret;
2550 }
2551
2552 struct ib_uflow_resources *flow_resources_alloc(size_t num_specs)
2553 {
2554         struct ib_uflow_resources *resources;
2555
2556         resources = kzalloc(sizeof(*resources), GFP_KERNEL);
2557
2558         if (!resources)
2559                 return NULL;
2560
2561         if (!num_specs)
2562                 goto out;
2563
2564         resources->counters =
2565                 kcalloc(num_specs, sizeof(*resources->counters), GFP_KERNEL);
2566         resources->collection =
2567                 kcalloc(num_specs, sizeof(*resources->collection), GFP_KERNEL);
2568
2569         if (!resources->counters || !resources->collection)
2570                 goto err;
2571
2572 out:
2573         resources->max = num_specs;
2574         return resources;
2575
2576 err:
2577         kfree(resources->counters);
2578         kfree(resources);
2579
2580         return NULL;
2581 }
2582 EXPORT_SYMBOL(flow_resources_alloc);
2583
2584 void ib_uverbs_flow_resources_free(struct ib_uflow_resources *uflow_res)
2585 {
2586         unsigned int i;
2587
2588         if (!uflow_res)
2589                 return;
2590
2591         for (i = 0; i < uflow_res->collection_num; i++)
2592                 atomic_dec(&uflow_res->collection[i]->usecnt);
2593
2594         for (i = 0; i < uflow_res->counters_num; i++)
2595                 atomic_dec(&uflow_res->counters[i]->usecnt);
2596
2597         kfree(uflow_res->collection);
2598         kfree(uflow_res->counters);
2599         kfree(uflow_res);
2600 }
2601 EXPORT_SYMBOL(ib_uverbs_flow_resources_free);
2602
2603 void flow_resources_add(struct ib_uflow_resources *uflow_res,
2604                         enum ib_flow_spec_type type,
2605                         void *ibobj)
2606 {
2607         WARN_ON(uflow_res->num >= uflow_res->max);
2608
2609         switch (type) {
2610         case IB_FLOW_SPEC_ACTION_HANDLE:
2611                 atomic_inc(&((struct ib_flow_action *)ibobj)->usecnt);
2612                 uflow_res->collection[uflow_res->collection_num++] =
2613                         (struct ib_flow_action *)ibobj;
2614                 break;
2615         case IB_FLOW_SPEC_ACTION_COUNT:
2616                 atomic_inc(&((struct ib_counters *)ibobj)->usecnt);
2617                 uflow_res->counters[uflow_res->counters_num++] =
2618                         (struct ib_counters *)ibobj;
2619                 break;
2620         default:
2621                 WARN_ON(1);
2622         }
2623
2624         uflow_res->num++;
2625 }
2626 EXPORT_SYMBOL(flow_resources_add);
2627
2628 static int kern_spec_to_ib_spec_action(const struct uverbs_attr_bundle *attrs,
2629                                        struct ib_uverbs_flow_spec *kern_spec,
2630                                        union ib_flow_spec *ib_spec,
2631                                        struct ib_uflow_resources *uflow_res)
2632 {
2633         ib_spec->type = kern_spec->type;
2634         switch (ib_spec->type) {
2635         case IB_FLOW_SPEC_ACTION_TAG:
2636                 if (kern_spec->flow_tag.size !=
2637                     sizeof(struct ib_uverbs_flow_spec_action_tag))
2638                         return -EINVAL;
2639
2640                 ib_spec->flow_tag.size = sizeof(struct ib_flow_spec_action_tag);
2641                 ib_spec->flow_tag.tag_id = kern_spec->flow_tag.tag_id;
2642                 break;
2643         case IB_FLOW_SPEC_ACTION_DROP:
2644                 if (kern_spec->drop.size !=
2645                     sizeof(struct ib_uverbs_flow_spec_action_drop))
2646                         return -EINVAL;
2647
2648                 ib_spec->drop.size = sizeof(struct ib_flow_spec_action_drop);
2649                 break;
2650         case IB_FLOW_SPEC_ACTION_HANDLE:
2651                 if (kern_spec->action.size !=
2652                     sizeof(struct ib_uverbs_flow_spec_action_handle))
2653                         return -EOPNOTSUPP;
2654                 ib_spec->action.act = uobj_get_obj_read(flow_action,
2655                                                         UVERBS_OBJECT_FLOW_ACTION,
2656                                                         kern_spec->action.handle,
2657                                                         attrs);
2658                 if (!ib_spec->action.act)
2659                         return -EINVAL;
2660                 ib_spec->action.size =
2661                         sizeof(struct ib_flow_spec_action_handle);
2662                 flow_resources_add(uflow_res,
2663                                    IB_FLOW_SPEC_ACTION_HANDLE,
2664                                    ib_spec->action.act);
2665                 uobj_put_obj_read(ib_spec->action.act);
2666                 break;
2667         case IB_FLOW_SPEC_ACTION_COUNT:
2668                 if (kern_spec->flow_count.size !=
2669                         sizeof(struct ib_uverbs_flow_spec_action_count))
2670                         return -EINVAL;
2671                 ib_spec->flow_count.counters =
2672                         uobj_get_obj_read(counters,
2673                                           UVERBS_OBJECT_COUNTERS,
2674                                           kern_spec->flow_count.handle,
2675                                           attrs);
2676                 if (!ib_spec->flow_count.counters)
2677                         return -EINVAL;
2678                 ib_spec->flow_count.size =
2679                                 sizeof(struct ib_flow_spec_action_count);
2680                 flow_resources_add(uflow_res,
2681                                    IB_FLOW_SPEC_ACTION_COUNT,
2682                                    ib_spec->flow_count.counters);
2683                 uobj_put_obj_read(ib_spec->flow_count.counters);
2684                 break;
2685         default:
2686                 return -EINVAL;
2687         }
2688         return 0;
2689 }
2690
2691 static size_t kern_spec_filter_sz(const struct ib_uverbs_flow_spec_hdr *spec)
2692 {
2693         /* Returns user space filter size, includes padding */
2694         return (spec->size - sizeof(struct ib_uverbs_flow_spec_hdr)) / 2;
2695 }
2696
2697 static ssize_t spec_filter_size(const void *kern_spec_filter, u16 kern_filter_size,
2698                                 u16 ib_real_filter_sz)
2699 {
2700         /*
2701          * User space filter structures must be 64 bit aligned, otherwise this
2702          * may pass, but we won't handle additional new attributes.
2703          */
2704
2705         if (kern_filter_size > ib_real_filter_sz) {
2706                 if (memchr_inv(kern_spec_filter +
2707                                ib_real_filter_sz, 0,
2708                                kern_filter_size - ib_real_filter_sz))
2709                         return -EINVAL;
2710                 return ib_real_filter_sz;
2711         }
2712         return kern_filter_size;
2713 }
2714
2715 int ib_uverbs_kern_spec_to_ib_spec_filter(enum ib_flow_spec_type type,
2716                                           const void *kern_spec_mask,
2717                                           const void *kern_spec_val,
2718                                           size_t kern_filter_sz,
2719                                           union ib_flow_spec *ib_spec)
2720 {
2721         ssize_t actual_filter_sz;
2722         ssize_t ib_filter_sz;
2723
2724         /* User flow spec size must be aligned to 4 bytes */
2725         if (kern_filter_sz != ALIGN(kern_filter_sz, 4))
2726                 return -EINVAL;
2727
2728         ib_spec->type = type;
2729
2730         if (ib_spec->type == (IB_FLOW_SPEC_INNER | IB_FLOW_SPEC_VXLAN_TUNNEL))
2731                 return -EINVAL;
2732
2733         switch (ib_spec->type & ~IB_FLOW_SPEC_INNER) {
2734         case IB_FLOW_SPEC_ETH:
2735                 ib_filter_sz = offsetof(struct ib_flow_eth_filter, real_sz);
2736                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2737                                                     kern_filter_sz,
2738                                                     ib_filter_sz);
2739                 if (actual_filter_sz <= 0)
2740                         return -EINVAL;
2741                 ib_spec->size = sizeof(struct ib_flow_spec_eth);
2742                 memcpy(&ib_spec->eth.val, kern_spec_val, actual_filter_sz);
2743                 memcpy(&ib_spec->eth.mask, kern_spec_mask, actual_filter_sz);
2744                 break;
2745         case IB_FLOW_SPEC_IPV4:
2746                 ib_filter_sz = offsetof(struct ib_flow_ipv4_filter, real_sz);
2747                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2748                                                     kern_filter_sz,
2749                                                     ib_filter_sz);
2750                 if (actual_filter_sz <= 0)
2751                         return -EINVAL;
2752                 ib_spec->size = sizeof(struct ib_flow_spec_ipv4);
2753                 memcpy(&ib_spec->ipv4.val, kern_spec_val, actual_filter_sz);
2754                 memcpy(&ib_spec->ipv4.mask, kern_spec_mask, actual_filter_sz);
2755                 break;
2756         case IB_FLOW_SPEC_IPV6:
2757                 ib_filter_sz = offsetof(struct ib_flow_ipv6_filter, real_sz);
2758                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2759                                                     kern_filter_sz,
2760                                                     ib_filter_sz);
2761                 if (actual_filter_sz <= 0)
2762                         return -EINVAL;
2763                 ib_spec->size = sizeof(struct ib_flow_spec_ipv6);
2764                 memcpy(&ib_spec->ipv6.val, kern_spec_val, actual_filter_sz);
2765                 memcpy(&ib_spec->ipv6.mask, kern_spec_mask, actual_filter_sz);
2766
2767                 if ((ntohl(ib_spec->ipv6.mask.flow_label)) >= BIT(20) ||
2768                     (ntohl(ib_spec->ipv6.val.flow_label)) >= BIT(20))
2769                         return -EINVAL;
2770                 break;
2771         case IB_FLOW_SPEC_TCP:
2772         case IB_FLOW_SPEC_UDP:
2773                 ib_filter_sz = offsetof(struct ib_flow_tcp_udp_filter, real_sz);
2774                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2775                                                     kern_filter_sz,
2776                                                     ib_filter_sz);
2777                 if (actual_filter_sz <= 0)
2778                         return -EINVAL;
2779                 ib_spec->size = sizeof(struct ib_flow_spec_tcp_udp);
2780                 memcpy(&ib_spec->tcp_udp.val, kern_spec_val, actual_filter_sz);
2781                 memcpy(&ib_spec->tcp_udp.mask, kern_spec_mask, actual_filter_sz);
2782                 break;
2783         case IB_FLOW_SPEC_VXLAN_TUNNEL:
2784                 ib_filter_sz = offsetof(struct ib_flow_tunnel_filter, real_sz);
2785                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2786                                                     kern_filter_sz,
2787                                                     ib_filter_sz);
2788                 if (actual_filter_sz <= 0)
2789                         return -EINVAL;
2790                 ib_spec->tunnel.size = sizeof(struct ib_flow_spec_tunnel);
2791                 memcpy(&ib_spec->tunnel.val, kern_spec_val, actual_filter_sz);
2792                 memcpy(&ib_spec->tunnel.mask, kern_spec_mask, actual_filter_sz);
2793
2794                 if ((ntohl(ib_spec->tunnel.mask.tunnel_id)) >= BIT(24) ||
2795                     (ntohl(ib_spec->tunnel.val.tunnel_id)) >= BIT(24))
2796                         return -EINVAL;
2797                 break;
2798         case IB_FLOW_SPEC_ESP:
2799                 ib_filter_sz = offsetof(struct ib_flow_esp_filter, real_sz);
2800                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2801                                                     kern_filter_sz,
2802                                                     ib_filter_sz);
2803                 if (actual_filter_sz <= 0)
2804                         return -EINVAL;
2805                 ib_spec->esp.size = sizeof(struct ib_flow_spec_esp);
2806                 memcpy(&ib_spec->esp.val, kern_spec_val, actual_filter_sz);
2807                 memcpy(&ib_spec->esp.mask, kern_spec_mask, actual_filter_sz);
2808                 break;
2809         case IB_FLOW_SPEC_GRE:
2810                 ib_filter_sz = offsetof(struct ib_flow_gre_filter, real_sz);
2811                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2812                                                     kern_filter_sz,
2813                                                     ib_filter_sz);
2814                 if (actual_filter_sz <= 0)
2815                         return -EINVAL;
2816                 ib_spec->gre.size = sizeof(struct ib_flow_spec_gre);
2817                 memcpy(&ib_spec->gre.val, kern_spec_val, actual_filter_sz);
2818                 memcpy(&ib_spec->gre.mask, kern_spec_mask, actual_filter_sz);
2819                 break;
2820         case IB_FLOW_SPEC_MPLS:
2821                 ib_filter_sz = offsetof(struct ib_flow_mpls_filter, real_sz);
2822                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2823                                                     kern_filter_sz,
2824                                                     ib_filter_sz);
2825                 if (actual_filter_sz <= 0)
2826                         return -EINVAL;
2827                 ib_spec->mpls.size = sizeof(struct ib_flow_spec_mpls);
2828                 memcpy(&ib_spec->mpls.val, kern_spec_val, actual_filter_sz);
2829                 memcpy(&ib_spec->mpls.mask, kern_spec_mask, actual_filter_sz);
2830                 break;
2831         default:
2832                 return -EINVAL;
2833         }
2834         return 0;
2835 }
2836
2837 static int kern_spec_to_ib_spec_filter(struct ib_uverbs_flow_spec *kern_spec,
2838                                        union ib_flow_spec *ib_spec)
2839 {
2840         ssize_t kern_filter_sz;
2841         void *kern_spec_mask;
2842         void *kern_spec_val;
2843
2844         kern_filter_sz = kern_spec_filter_sz(&kern_spec->hdr);
2845
2846         kern_spec_val = (void *)kern_spec +
2847                 sizeof(struct ib_uverbs_flow_spec_hdr);
2848         kern_spec_mask = kern_spec_val + kern_filter_sz;
2849
2850         return ib_uverbs_kern_spec_to_ib_spec_filter(kern_spec->type,
2851                                                      kern_spec_mask,
2852                                                      kern_spec_val,
2853                                                      kern_filter_sz, ib_spec);
2854 }
2855
2856 static int kern_spec_to_ib_spec(struct uverbs_attr_bundle *attrs,
2857                                 struct ib_uverbs_flow_spec *kern_spec,
2858                                 union ib_flow_spec *ib_spec,
2859                                 struct ib_uflow_resources *uflow_res)
2860 {
2861         if (kern_spec->reserved)
2862                 return -EINVAL;
2863
2864         if (kern_spec->type >= IB_FLOW_SPEC_ACTION_TAG)
2865                 return kern_spec_to_ib_spec_action(attrs, kern_spec, ib_spec,
2866                                                    uflow_res);
2867         else
2868                 return kern_spec_to_ib_spec_filter(kern_spec, ib_spec);
2869 }
2870
2871 static int ib_uverbs_ex_create_wq(struct uverbs_attr_bundle *attrs)
2872 {
2873         struct ib_uverbs_ex_create_wq cmd;
2874         struct ib_uverbs_ex_create_wq_resp resp = {};
2875         struct ib_uwq_object           *obj;
2876         int err = 0;
2877         struct ib_cq *cq;
2878         struct ib_pd *pd;
2879         struct ib_wq *wq;
2880         struct ib_wq_init_attr wq_init_attr = {};
2881         struct ib_device *ib_dev;
2882
2883         err = uverbs_request(attrs, &cmd, sizeof(cmd));
2884         if (err)
2885                 return err;
2886
2887         if (cmd.comp_mask)
2888                 return -EOPNOTSUPP;
2889
2890         obj = (struct ib_uwq_object *)uobj_alloc(UVERBS_OBJECT_WQ, attrs,
2891                                                  &ib_dev);
2892         if (IS_ERR(obj))
2893                 return PTR_ERR(obj);
2894
2895         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
2896         if (!pd) {
2897                 err = -EINVAL;
2898                 goto err_uobj;
2899         }
2900
2901         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
2902         if (!cq) {
2903                 err = -EINVAL;
2904                 goto err_put_pd;
2905         }
2906
2907         wq_init_attr.cq = cq;
2908         wq_init_attr.max_sge = cmd.max_sge;
2909         wq_init_attr.max_wr = cmd.max_wr;
2910         wq_init_attr.wq_context = attrs->ufile;
2911         wq_init_attr.wq_type = cmd.wq_type;
2912         wq_init_attr.event_handler = ib_uverbs_wq_event_handler;
2913         wq_init_attr.create_flags = cmd.create_flags;
2914         obj->uevent.events_reported = 0;
2915         INIT_LIST_HEAD(&obj->uevent.event_list);
2916
2917         wq = pd->device->ops.create_wq(pd, &wq_init_attr, &attrs->driver_udata);
2918         if (IS_ERR(wq)) {
2919                 err = PTR_ERR(wq);
2920                 goto err_put_cq;
2921         }
2922
2923         wq->uobject = &obj->uevent.uobject;
2924         obj->uevent.uobject.object = wq;
2925         wq->wq_type = wq_init_attr.wq_type;
2926         wq->cq = cq;
2927         wq->pd = pd;
2928         wq->device = pd->device;
2929         wq->wq_context = wq_init_attr.wq_context;
2930         atomic_set(&wq->usecnt, 0);
2931         atomic_inc(&pd->usecnt);
2932         atomic_inc(&cq->usecnt);
2933         wq->uobject = &obj->uevent.uobject;
2934         obj->uevent.uobject.object = wq;
2935
2936         memset(&resp, 0, sizeof(resp));
2937         resp.wq_handle = obj->uevent.uobject.id;
2938         resp.max_sge = wq_init_attr.max_sge;
2939         resp.max_wr = wq_init_attr.max_wr;
2940         resp.wqn = wq->wq_num;
2941         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
2942         err = uverbs_response(attrs, &resp, sizeof(resp));
2943         if (err)
2944                 goto err_copy;
2945
2946         uobj_put_obj_read(pd);
2947         uobj_put_obj_read(cq);
2948         return uobj_alloc_commit(&obj->uevent.uobject);
2949
2950 err_copy:
2951         ib_destroy_wq(wq);
2952 err_put_cq:
2953         uobj_put_obj_read(cq);
2954 err_put_pd:
2955         uobj_put_obj_read(pd);
2956 err_uobj:
2957         uobj_alloc_abort(&obj->uevent.uobject);
2958
2959         return err;
2960 }
2961
2962 static int ib_uverbs_ex_destroy_wq(struct uverbs_attr_bundle *attrs)
2963 {
2964         struct ib_uverbs_ex_destroy_wq  cmd;
2965         struct ib_uverbs_ex_destroy_wq_resp     resp = {};
2966         struct ib_uobject               *uobj;
2967         struct ib_uwq_object            *obj;
2968         int                             ret;
2969
2970         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2971         if (ret)
2972                 return ret;
2973
2974         if (cmd.comp_mask)
2975                 return -EOPNOTSUPP;
2976
2977         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
2978         uobj = uobj_get_destroy(UVERBS_OBJECT_WQ, cmd.wq_handle, attrs);
2979         if (IS_ERR(uobj))
2980                 return PTR_ERR(uobj);
2981
2982         obj = container_of(uobj, struct ib_uwq_object, uevent.uobject);
2983         resp.events_reported = obj->uevent.events_reported;
2984
2985         uobj_put_destroy(uobj);
2986
2987         return uverbs_response(attrs, &resp, sizeof(resp));
2988 }
2989
2990 static int ib_uverbs_ex_modify_wq(struct uverbs_attr_bundle *attrs)
2991 {
2992         struct ib_uverbs_ex_modify_wq cmd;
2993         struct ib_wq *wq;
2994         struct ib_wq_attr wq_attr = {};
2995         int ret;
2996
2997         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2998         if (ret)
2999                 return ret;
3000
3001         if (!cmd.attr_mask)
3002                 return -EINVAL;
3003
3004         if (cmd.attr_mask > (IB_WQ_STATE | IB_WQ_CUR_STATE | IB_WQ_FLAGS))
3005                 return -EINVAL;
3006
3007         wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ, cmd.wq_handle, attrs);
3008         if (!wq)
3009                 return -EINVAL;
3010
3011         wq_attr.curr_wq_state = cmd.curr_wq_state;
3012         wq_attr.wq_state = cmd.wq_state;
3013         if (cmd.attr_mask & IB_WQ_FLAGS) {
3014                 wq_attr.flags = cmd.flags;
3015                 wq_attr.flags_mask = cmd.flags_mask;
3016         }
3017         ret = wq->device->ops.modify_wq(wq, &wq_attr, cmd.attr_mask,
3018                                         &attrs->driver_udata);
3019         uobj_put_obj_read(wq);
3020         return ret;
3021 }
3022
3023 static int ib_uverbs_ex_create_rwq_ind_table(struct uverbs_attr_bundle *attrs)
3024 {
3025         struct ib_uverbs_ex_create_rwq_ind_table cmd;
3026         struct ib_uverbs_ex_create_rwq_ind_table_resp  resp = {};
3027         struct ib_uobject                 *uobj;
3028         int err;
3029         struct ib_rwq_ind_table_init_attr init_attr = {};
3030         struct ib_rwq_ind_table *rwq_ind_tbl;
3031         struct ib_wq    **wqs = NULL;
3032         u32 *wqs_handles = NULL;
3033         struct ib_wq    *wq = NULL;
3034         int i, j, num_read_wqs;
3035         u32 num_wq_handles;
3036         struct uverbs_req_iter iter;
3037         struct ib_device *ib_dev;
3038
3039         err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
3040         if (err)
3041                 return err;
3042
3043         if (cmd.comp_mask)
3044                 return -EOPNOTSUPP;
3045
3046         if (cmd.log_ind_tbl_size > IB_USER_VERBS_MAX_LOG_IND_TBL_SIZE)
3047                 return -EINVAL;
3048
3049         num_wq_handles = 1 << cmd.log_ind_tbl_size;
3050         wqs_handles = kcalloc(num_wq_handles, sizeof(*wqs_handles),
3051                               GFP_KERNEL);
3052         if (!wqs_handles)
3053                 return -ENOMEM;
3054
3055         err = uverbs_request_next(&iter, wqs_handles,
3056                                   num_wq_handles * sizeof(__u32));
3057         if (err)
3058                 goto err_free;
3059
3060         err = uverbs_request_finish(&iter);
3061         if (err)
3062                 goto err_free;
3063
3064         wqs = kcalloc(num_wq_handles, sizeof(*wqs), GFP_KERNEL);
3065         if (!wqs) {
3066                 err = -ENOMEM;
3067                 goto  err_free;
3068         }
3069
3070         for (num_read_wqs = 0; num_read_wqs < num_wq_handles;
3071                         num_read_wqs++) {
3072                 wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ,
3073                                        wqs_handles[num_read_wqs], attrs);
3074                 if (!wq) {
3075                         err = -EINVAL;
3076                         goto put_wqs;
3077                 }
3078
3079                 wqs[num_read_wqs] = wq;
3080         }
3081
3082         uobj = uobj_alloc(UVERBS_OBJECT_RWQ_IND_TBL, attrs, &ib_dev);
3083         if (IS_ERR(uobj)) {
3084                 err = PTR_ERR(uobj);
3085                 goto put_wqs;
3086         }
3087
3088         init_attr.log_ind_tbl_size = cmd.log_ind_tbl_size;
3089         init_attr.ind_tbl = wqs;
3090
3091         rwq_ind_tbl = ib_dev->ops.create_rwq_ind_table(ib_dev, &init_attr,
3092                                                        &attrs->driver_udata);
3093
3094         if (IS_ERR(rwq_ind_tbl)) {
3095                 err = PTR_ERR(rwq_ind_tbl);
3096                 goto err_uobj;
3097         }
3098
3099         rwq_ind_tbl->ind_tbl = wqs;
3100         rwq_ind_tbl->log_ind_tbl_size = init_attr.log_ind_tbl_size;
3101         rwq_ind_tbl->uobject = uobj;
3102         uobj->object = rwq_ind_tbl;
3103         rwq_ind_tbl->device = ib_dev;
3104         atomic_set(&rwq_ind_tbl->usecnt, 0);
3105
3106         for (i = 0; i < num_wq_handles; i++)
3107                 atomic_inc(&wqs[i]->usecnt);
3108
3109         resp.ind_tbl_handle = uobj->id;
3110         resp.ind_tbl_num = rwq_ind_tbl->ind_tbl_num;
3111         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
3112
3113         err = uverbs_response(attrs, &resp, sizeof(resp));
3114         if (err)
3115                 goto err_copy;
3116
3117         kfree(wqs_handles);
3118
3119         for (j = 0; j < num_read_wqs; j++)
3120                 uobj_put_obj_read(wqs[j]);
3121
3122         return uobj_alloc_commit(uobj);
3123
3124 err_copy:
3125         ib_destroy_rwq_ind_table(rwq_ind_tbl);
3126 err_uobj:
3127         uobj_alloc_abort(uobj);
3128 put_wqs:
3129         for (j = 0; j < num_read_wqs; j++)
3130                 uobj_put_obj_read(wqs[j]);
3131 err_free:
3132         kfree(wqs_handles);
3133         kfree(wqs);
3134         return err;
3135 }
3136
3137 static int ib_uverbs_ex_destroy_rwq_ind_table(struct uverbs_attr_bundle *attrs)
3138 {
3139         struct ib_uverbs_ex_destroy_rwq_ind_table cmd;
3140         int ret;
3141
3142         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3143         if (ret)
3144                 return ret;
3145
3146         if (cmd.comp_mask)
3147                 return -EOPNOTSUPP;
3148
3149         return uobj_perform_destroy(UVERBS_OBJECT_RWQ_IND_TBL,
3150                                     cmd.ind_tbl_handle, attrs);
3151 }
3152
3153 static int ib_uverbs_ex_create_flow(struct uverbs_attr_bundle *attrs)
3154 {
3155         struct ib_uverbs_create_flow      cmd;
3156         struct ib_uverbs_create_flow_resp resp;
3157         struct ib_uobject                 *uobj;
3158         struct ib_flow                    *flow_id;
3159         struct ib_uverbs_flow_attr        *kern_flow_attr;
3160         struct ib_flow_attr               *flow_attr;
3161         struct ib_qp                      *qp;
3162         struct ib_uflow_resources         *uflow_res;
3163         struct ib_uverbs_flow_spec_hdr    *kern_spec;
3164         struct uverbs_req_iter iter;
3165         int err;
3166         void *ib_spec;
3167         int i;
3168         struct ib_device *ib_dev;
3169
3170         err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
3171         if (err)
3172                 return err;
3173
3174         if (cmd.comp_mask)
3175                 return -EINVAL;
3176
3177         if (!capable(CAP_NET_RAW))
3178                 return -EPERM;
3179
3180         if (cmd.flow_attr.flags >= IB_FLOW_ATTR_FLAGS_RESERVED)
3181                 return -EINVAL;
3182
3183         if ((cmd.flow_attr.flags & IB_FLOW_ATTR_FLAGS_DONT_TRAP) &&
3184             ((cmd.flow_attr.type == IB_FLOW_ATTR_ALL_DEFAULT) ||
3185              (cmd.flow_attr.type == IB_FLOW_ATTR_MC_DEFAULT)))
3186                 return -EINVAL;
3187
3188         if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS)
3189                 return -EINVAL;
3190
3191         if (cmd.flow_attr.size >
3192             (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec)))
3193                 return -EINVAL;
3194
3195         if (cmd.flow_attr.reserved[0] ||
3196             cmd.flow_attr.reserved[1])
3197                 return -EINVAL;
3198
3199         if (cmd.flow_attr.num_of_specs) {
3200                 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size,
3201                                          GFP_KERNEL);
3202                 if (!kern_flow_attr)
3203                         return -ENOMEM;
3204
3205                 *kern_flow_attr = cmd.flow_attr;
3206                 err = uverbs_request_next(&iter, &kern_flow_attr->flow_specs,
3207                                           cmd.flow_attr.size);
3208                 if (err)
3209                         goto err_free_attr;
3210         } else {
3211                 kern_flow_attr = &cmd.flow_attr;
3212         }
3213
3214         err = uverbs_request_finish(&iter);
3215         if (err)
3216                 goto err_free_attr;
3217
3218         uobj = uobj_alloc(UVERBS_OBJECT_FLOW, attrs, &ib_dev);
3219         if (IS_ERR(uobj)) {
3220                 err = PTR_ERR(uobj);
3221                 goto err_free_attr;
3222         }
3223
3224         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
3225         if (!qp) {
3226                 err = -EINVAL;
3227                 goto err_uobj;
3228         }
3229
3230         if (qp->qp_type != IB_QPT_UD && qp->qp_type != IB_QPT_RAW_PACKET) {
3231                 err = -EINVAL;
3232                 goto err_put;
3233         }
3234
3235         flow_attr = kzalloc(struct_size(flow_attr, flows,
3236                                 cmd.flow_attr.num_of_specs), GFP_KERNEL);
3237         if (!flow_attr) {
3238                 err = -ENOMEM;
3239                 goto err_put;
3240         }
3241         uflow_res = flow_resources_alloc(cmd.flow_attr.num_of_specs);
3242         if (!uflow_res) {
3243                 err = -ENOMEM;
3244                 goto err_free_flow_attr;
3245         }
3246
3247         flow_attr->type = kern_flow_attr->type;
3248         flow_attr->priority = kern_flow_attr->priority;
3249         flow_attr->num_of_specs = kern_flow_attr->num_of_specs;
3250         flow_attr->port = kern_flow_attr->port;
3251         flow_attr->flags = kern_flow_attr->flags;
3252         flow_attr->size = sizeof(*flow_attr);
3253
3254         kern_spec = kern_flow_attr->flow_specs;
3255         ib_spec = flow_attr + 1;
3256         for (i = 0; i < flow_attr->num_of_specs &&
3257                         cmd.flow_attr.size >= sizeof(*kern_spec) &&
3258                         cmd.flow_attr.size >= kern_spec->size;
3259              i++) {
3260                 err = kern_spec_to_ib_spec(
3261                                 attrs, (struct ib_uverbs_flow_spec *)kern_spec,
3262                                 ib_spec, uflow_res);
3263                 if (err)
3264                         goto err_free;
3265
3266                 flow_attr->size +=
3267                         ((union ib_flow_spec *) ib_spec)->size;
3268                 cmd.flow_attr.size -= kern_spec->size;
3269                 kern_spec = ((void *)kern_spec) + kern_spec->size;
3270                 ib_spec += ((union ib_flow_spec *) ib_spec)->size;
3271         }
3272         if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) {
3273                 pr_warn("create flow failed, flow %d: %d bytes left from uverb cmd\n",
3274                         i, cmd.flow_attr.size);
3275                 err = -EINVAL;
3276                 goto err_free;
3277         }
3278
3279         flow_id = qp->device->ops.create_flow(
3280                 qp, flow_attr, IB_FLOW_DOMAIN_USER, &attrs->driver_udata);
3281
3282         if (IS_ERR(flow_id)) {
3283                 err = PTR_ERR(flow_id);
3284                 goto err_free;
3285         }
3286
3287         ib_set_flow(uobj, flow_id, qp, qp->device, uflow_res);
3288
3289         memset(&resp, 0, sizeof(resp));
3290         resp.flow_handle = uobj->id;
3291
3292         err = uverbs_response(attrs, &resp, sizeof(resp));
3293         if (err)
3294                 goto err_copy;
3295
3296         uobj_put_obj_read(qp);
3297         kfree(flow_attr);
3298         if (cmd.flow_attr.num_of_specs)
3299                 kfree(kern_flow_attr);
3300         return uobj_alloc_commit(uobj);
3301 err_copy:
3302         if (!qp->device->ops.destroy_flow(flow_id))
3303                 atomic_dec(&qp->usecnt);
3304 err_free:
3305         ib_uverbs_flow_resources_free(uflow_res);
3306 err_free_flow_attr:
3307         kfree(flow_attr);
3308 err_put:
3309         uobj_put_obj_read(qp);
3310 err_uobj:
3311         uobj_alloc_abort(uobj);
3312 err_free_attr:
3313         if (cmd.flow_attr.num_of_specs)
3314                 kfree(kern_flow_attr);
3315         return err;
3316 }
3317
3318 static int ib_uverbs_ex_destroy_flow(struct uverbs_attr_bundle *attrs)
3319 {
3320         struct ib_uverbs_destroy_flow   cmd;
3321         int                             ret;
3322
3323         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3324         if (ret)
3325                 return ret;
3326
3327         if (cmd.comp_mask)
3328                 return -EINVAL;
3329
3330         return uobj_perform_destroy(UVERBS_OBJECT_FLOW, cmd.flow_handle, attrs);
3331 }
3332
3333 static int __uverbs_create_xsrq(struct uverbs_attr_bundle *attrs,
3334                                 struct ib_uverbs_create_xsrq *cmd,
3335                                 struct ib_udata *udata)
3336 {
3337         struct ib_uverbs_create_srq_resp resp;
3338         struct ib_usrq_object           *obj;
3339         struct ib_pd                    *pd;
3340         struct ib_srq                   *srq;
3341         struct ib_uobject               *uninitialized_var(xrcd_uobj);
3342         struct ib_srq_init_attr          attr;
3343         int ret;
3344         struct ib_device *ib_dev;
3345
3346         obj = (struct ib_usrq_object *)uobj_alloc(UVERBS_OBJECT_SRQ, attrs,
3347                                                   &ib_dev);
3348         if (IS_ERR(obj))
3349                 return PTR_ERR(obj);
3350
3351         if (cmd->srq_type == IB_SRQT_TM)
3352                 attr.ext.tag_matching.max_num_tags = cmd->max_num_tags;
3353
3354         if (cmd->srq_type == IB_SRQT_XRC) {
3355                 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->xrcd_handle,
3356                                           attrs);
3357                 if (IS_ERR(xrcd_uobj)) {
3358                         ret = -EINVAL;
3359                         goto err;
3360                 }
3361
3362                 attr.ext.xrc.xrcd = (struct ib_xrcd *)xrcd_uobj->object;
3363                 if (!attr.ext.xrc.xrcd) {
3364                         ret = -EINVAL;
3365                         goto err_put_xrcd;
3366                 }
3367
3368                 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
3369                 atomic_inc(&obj->uxrcd->refcnt);
3370         }
3371
3372         if (ib_srq_has_cq(cmd->srq_type)) {
3373                 attr.ext.cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ,
3374                                                 cmd->cq_handle, attrs);
3375                 if (!attr.ext.cq) {
3376                         ret = -EINVAL;
3377                         goto err_put_xrcd;
3378                 }
3379         }
3380
3381         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle, attrs);
3382         if (!pd) {
3383                 ret = -EINVAL;
3384                 goto err_put_cq;
3385         }
3386
3387         attr.event_handler  = ib_uverbs_srq_event_handler;
3388         attr.srq_context    = attrs->ufile;
3389         attr.srq_type       = cmd->srq_type;
3390         attr.attr.max_wr    = cmd->max_wr;
3391         attr.attr.max_sge   = cmd->max_sge;
3392         attr.attr.srq_limit = cmd->srq_limit;
3393
3394         obj->uevent.events_reported = 0;
3395         INIT_LIST_HEAD(&obj->uevent.event_list);
3396
3397         srq = pd->device->ops.create_srq(pd, &attr, udata);
3398         if (IS_ERR(srq)) {
3399                 ret = PTR_ERR(srq);
3400                 goto err_put;
3401         }
3402
3403         srq->device        = pd->device;
3404         srq->pd            = pd;
3405         srq->srq_type      = cmd->srq_type;
3406         srq->uobject       = &obj->uevent.uobject;
3407         srq->event_handler = attr.event_handler;
3408         srq->srq_context   = attr.srq_context;
3409
3410         if (ib_srq_has_cq(cmd->srq_type)) {
3411                 srq->ext.cq       = attr.ext.cq;
3412                 atomic_inc(&attr.ext.cq->usecnt);
3413         }
3414
3415         if (cmd->srq_type == IB_SRQT_XRC) {
3416                 srq->ext.xrc.xrcd = attr.ext.xrc.xrcd;
3417                 atomic_inc(&attr.ext.xrc.xrcd->usecnt);
3418         }
3419
3420         atomic_inc(&pd->usecnt);
3421         atomic_set(&srq->usecnt, 0);
3422
3423         obj->uevent.uobject.object = srq;
3424         obj->uevent.uobject.user_handle = cmd->user_handle;
3425
3426         memset(&resp, 0, sizeof resp);
3427         resp.srq_handle = obj->uevent.uobject.id;
3428         resp.max_wr     = attr.attr.max_wr;
3429         resp.max_sge    = attr.attr.max_sge;
3430         if (cmd->srq_type == IB_SRQT_XRC)
3431                 resp.srqn = srq->ext.xrc.srq_num;
3432
3433         ret = uverbs_response(attrs, &resp, sizeof(resp));
3434         if (ret)
3435                 goto err_copy;
3436
3437         if (cmd->srq_type == IB_SRQT_XRC)
3438                 uobj_put_read(xrcd_uobj);
3439
3440         if (ib_srq_has_cq(cmd->srq_type))
3441                 uobj_put_obj_read(attr.ext.cq);
3442
3443         uobj_put_obj_read(pd);
3444         return uobj_alloc_commit(&obj->uevent.uobject);
3445
3446 err_copy:
3447         ib_destroy_srq(srq);
3448
3449 err_put:
3450         uobj_put_obj_read(pd);
3451
3452 err_put_cq:
3453         if (ib_srq_has_cq(cmd->srq_type))
3454                 uobj_put_obj_read(attr.ext.cq);
3455
3456 err_put_xrcd:
3457         if (cmd->srq_type == IB_SRQT_XRC) {
3458                 atomic_dec(&obj->uxrcd->refcnt);
3459                 uobj_put_read(xrcd_uobj);
3460         }
3461
3462 err:
3463         uobj_alloc_abort(&obj->uevent.uobject);
3464         return ret;
3465 }
3466
3467 static int ib_uverbs_create_srq(struct uverbs_attr_bundle *attrs)
3468 {
3469         struct ib_uverbs_create_srq      cmd;
3470         struct ib_uverbs_create_xsrq     xcmd;
3471         int ret;
3472
3473         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3474         if (ret)
3475                 return ret;
3476
3477         memset(&xcmd, 0, sizeof(xcmd));
3478         xcmd.response    = cmd.response;
3479         xcmd.user_handle = cmd.user_handle;
3480         xcmd.srq_type    = IB_SRQT_BASIC;
3481         xcmd.pd_handle   = cmd.pd_handle;
3482         xcmd.max_wr      = cmd.max_wr;
3483         xcmd.max_sge     = cmd.max_sge;
3484         xcmd.srq_limit   = cmd.srq_limit;
3485
3486         return __uverbs_create_xsrq(attrs, &xcmd, &attrs->driver_udata);
3487 }
3488
3489 static int ib_uverbs_create_xsrq(struct uverbs_attr_bundle *attrs)
3490 {
3491         struct ib_uverbs_create_xsrq     cmd;
3492         int ret;
3493
3494         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3495         if (ret)
3496                 return ret;
3497
3498         return __uverbs_create_xsrq(attrs, &cmd, &attrs->driver_udata);
3499 }
3500
3501 static int ib_uverbs_modify_srq(struct uverbs_attr_bundle *attrs)
3502 {
3503         struct ib_uverbs_modify_srq cmd;
3504         struct ib_srq              *srq;
3505         struct ib_srq_attr          attr;
3506         int                         ret;
3507
3508         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3509         if (ret)
3510                 return ret;
3511
3512         srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
3513         if (!srq)
3514                 return -EINVAL;
3515
3516         attr.max_wr    = cmd.max_wr;
3517         attr.srq_limit = cmd.srq_limit;
3518
3519         ret = srq->device->ops.modify_srq(srq, &attr, cmd.attr_mask,
3520                                           &attrs->driver_udata);
3521
3522         uobj_put_obj_read(srq);
3523
3524         return ret;
3525 }
3526
3527 static int ib_uverbs_query_srq(struct uverbs_attr_bundle *attrs)
3528 {
3529         struct ib_uverbs_query_srq      cmd;
3530         struct ib_uverbs_query_srq_resp resp;
3531         struct ib_srq_attr              attr;
3532         struct ib_srq                   *srq;
3533         int                             ret;
3534
3535         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3536         if (ret)
3537                 return ret;
3538
3539         srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
3540         if (!srq)
3541                 return -EINVAL;
3542
3543         ret = ib_query_srq(srq, &attr);
3544
3545         uobj_put_obj_read(srq);
3546
3547         if (ret)
3548                 return ret;
3549
3550         memset(&resp, 0, sizeof resp);
3551
3552         resp.max_wr    = attr.max_wr;
3553         resp.max_sge   = attr.max_sge;
3554         resp.srq_limit = attr.srq_limit;
3555
3556         return uverbs_response(attrs, &resp, sizeof(resp));
3557 }
3558
3559 static int ib_uverbs_destroy_srq(struct uverbs_attr_bundle *attrs)
3560 {
3561         struct ib_uverbs_destroy_srq      cmd;
3562         struct ib_uverbs_destroy_srq_resp resp;
3563         struct ib_uobject                *uobj;
3564         struct ib_uevent_object          *obj;
3565         int ret;
3566
3567         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3568         if (ret)
3569                 return ret;
3570
3571         uobj = uobj_get_destroy(UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
3572         if (IS_ERR(uobj))
3573                 return PTR_ERR(uobj);
3574
3575         obj = container_of(uobj, struct ib_uevent_object, uobject);
3576         memset(&resp, 0, sizeof(resp));
3577         resp.events_reported = obj->events_reported;
3578
3579         uobj_put_destroy(uobj);
3580
3581         return uverbs_response(attrs, &resp, sizeof(resp));
3582 }
3583
3584 static int ib_uverbs_ex_query_device(struct uverbs_attr_bundle *attrs)
3585 {
3586         struct ib_uverbs_ex_query_device_resp resp = {};
3587         struct ib_uverbs_ex_query_device  cmd;
3588         struct ib_device_attr attr = {0};
3589         struct ib_ucontext *ucontext;
3590         struct ib_device *ib_dev;
3591         int err;
3592
3593         ucontext = ib_uverbs_get_ucontext(attrs);
3594         if (IS_ERR(ucontext))
3595                 return PTR_ERR(ucontext);
3596         ib_dev = ucontext->device;
3597
3598         err = uverbs_request(attrs, &cmd, sizeof(cmd));
3599         if (err)
3600                 return err;
3601
3602         if (cmd.comp_mask)
3603                 return -EINVAL;
3604
3605         if (cmd.reserved)
3606                 return -EINVAL;
3607
3608         err = ib_dev->ops.query_device(ib_dev, &attr, &attrs->driver_udata);
3609         if (err)
3610                 return err;
3611
3612         copy_query_dev_fields(ucontext, &resp.base, &attr);
3613
3614 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
3615         resp.odp_caps.general_caps = attr.odp_caps.general_caps;
3616         resp.odp_caps.per_transport_caps.rc_odp_caps =
3617                 attr.odp_caps.per_transport_caps.rc_odp_caps;
3618         resp.odp_caps.per_transport_caps.uc_odp_caps =
3619                 attr.odp_caps.per_transport_caps.uc_odp_caps;
3620         resp.odp_caps.per_transport_caps.ud_odp_caps =
3621                 attr.odp_caps.per_transport_caps.ud_odp_caps;
3622 #endif
3623
3624         resp.timestamp_mask = attr.timestamp_mask;
3625         resp.hca_core_clock = attr.hca_core_clock;
3626         resp.device_cap_flags_ex = attr.device_cap_flags;
3627         resp.rss_caps.supported_qpts = attr.rss_caps.supported_qpts;
3628         resp.rss_caps.max_rwq_indirection_tables =
3629                 attr.rss_caps.max_rwq_indirection_tables;
3630         resp.rss_caps.max_rwq_indirection_table_size =
3631                 attr.rss_caps.max_rwq_indirection_table_size;
3632         resp.max_wq_type_rq = attr.max_wq_type_rq;
3633         resp.raw_packet_caps = attr.raw_packet_caps;
3634         resp.tm_caps.max_rndv_hdr_size  = attr.tm_caps.max_rndv_hdr_size;
3635         resp.tm_caps.max_num_tags       = attr.tm_caps.max_num_tags;
3636         resp.tm_caps.max_ops            = attr.tm_caps.max_ops;
3637         resp.tm_caps.max_sge            = attr.tm_caps.max_sge;
3638         resp.tm_caps.flags              = attr.tm_caps.flags;
3639         resp.cq_moderation_caps.max_cq_moderation_count  =
3640                 attr.cq_caps.max_cq_moderation_count;
3641         resp.cq_moderation_caps.max_cq_moderation_period =
3642                 attr.cq_caps.max_cq_moderation_period;
3643         resp.max_dm_size = attr.max_dm_size;
3644         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
3645
3646         return uverbs_response(attrs, &resp, sizeof(resp));
3647 }
3648
3649 static int ib_uverbs_ex_modify_cq(struct uverbs_attr_bundle *attrs)
3650 {
3651         struct ib_uverbs_ex_modify_cq cmd;
3652         struct ib_cq *cq;
3653         int ret;
3654
3655         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3656         if (ret)
3657                 return ret;
3658
3659         if (!cmd.attr_mask || cmd.reserved)
3660                 return -EINVAL;
3661
3662         if (cmd.attr_mask > IB_CQ_MODERATE)
3663                 return -EOPNOTSUPP;
3664
3665         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
3666         if (!cq)
3667                 return -EINVAL;
3668
3669         ret = rdma_set_cq_moderation(cq, cmd.attr.cq_count, cmd.attr.cq_period);
3670
3671         uobj_put_obj_read(cq);
3672
3673         return ret;
3674 }
3675
3676 /*
3677  * Describe the input structs for write(). Some write methods have an input
3678  * only struct, most have an input and output. If the struct has an output then
3679  * the 'response' u64 must be the first field in the request structure.
3680  *
3681  * If udata is present then both the request and response structs have a
3682  * trailing driver_data flex array. In this case the size of the base struct
3683  * cannot be changed.
3684  */
3685 #define offsetof_after(_struct, _member)                                       \
3686         (offsetof(_struct, _member) + sizeof(((_struct *)NULL)->_member))
3687
3688 #define UAPI_DEF_WRITE_IO(req, resp)                                           \
3689         .write.has_resp = 1 +                                                  \
3690                           BUILD_BUG_ON_ZERO(offsetof(req, response) != 0) +    \
3691                           BUILD_BUG_ON_ZERO(sizeof(((req *)0)->response) !=    \
3692                                             sizeof(u64)),                      \
3693         .write.req_size = sizeof(req), .write.resp_size = sizeof(resp)
3694
3695 #define UAPI_DEF_WRITE_I(req) .write.req_size = sizeof(req)
3696
3697 #define UAPI_DEF_WRITE_UDATA_IO(req, resp)                                     \
3698         UAPI_DEF_WRITE_IO(req, resp),                                          \
3699                 .write.has_udata =                                             \
3700                         1 +                                                    \
3701                         BUILD_BUG_ON_ZERO(offsetof(req, driver_data) !=        \
3702                                           sizeof(req)) +                       \
3703                         BUILD_BUG_ON_ZERO(offsetof(resp, driver_data) !=       \
3704                                           sizeof(resp))
3705
3706 #define UAPI_DEF_WRITE_UDATA_I(req)                                            \
3707         UAPI_DEF_WRITE_I(req),                                                 \
3708                 .write.has_udata =                                             \
3709                         1 + BUILD_BUG_ON_ZERO(offsetof(req, driver_data) !=    \
3710                                               sizeof(req))
3711
3712 /*
3713  * The _EX versions are for use with WRITE_EX and allow the last struct member
3714  * to be specified. Buffers that do not include that member will be rejected.
3715  */
3716 #define UAPI_DEF_WRITE_IO_EX(req, req_last_member, resp, resp_last_member)     \
3717         .write.has_resp = 1,                                                   \
3718         .write.req_size = offsetof_after(req, req_last_member),                \
3719         .write.resp_size = offsetof_after(resp, resp_last_member)
3720
3721 #define UAPI_DEF_WRITE_I_EX(req, req_last_member)                              \
3722         .write.req_size = offsetof_after(req, req_last_member)
3723
3724 const struct uapi_definition uverbs_def_write_intf[] = {
3725         DECLARE_UVERBS_OBJECT(
3726                 UVERBS_OBJECT_AH,
3727                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_AH,
3728                                      ib_uverbs_create_ah,
3729                                      UAPI_DEF_WRITE_UDATA_IO(
3730                                              struct ib_uverbs_create_ah,
3731                                              struct ib_uverbs_create_ah_resp),
3732                                      UAPI_DEF_METHOD_NEEDS_FN(create_ah)),
3733                 DECLARE_UVERBS_WRITE(
3734                         IB_USER_VERBS_CMD_DESTROY_AH,
3735                         ib_uverbs_destroy_ah,
3736                         UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_ah),
3737                         UAPI_DEF_METHOD_NEEDS_FN(destroy_ah))),
3738
3739         DECLARE_UVERBS_OBJECT(
3740                 UVERBS_OBJECT_COMP_CHANNEL,
3741                 DECLARE_UVERBS_WRITE(
3742                         IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL,
3743                         ib_uverbs_create_comp_channel,
3744                         UAPI_DEF_WRITE_IO(
3745                                 struct ib_uverbs_create_comp_channel,
3746                                 struct ib_uverbs_create_comp_channel_resp))),
3747
3748         DECLARE_UVERBS_OBJECT(
3749                 UVERBS_OBJECT_CQ,
3750                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_CQ,
3751                                      ib_uverbs_create_cq,
3752                                      UAPI_DEF_WRITE_UDATA_IO(
3753                                              struct ib_uverbs_create_cq,
3754                                              struct ib_uverbs_create_cq_resp),
3755                                      UAPI_DEF_METHOD_NEEDS_FN(create_cq)),
3756                 DECLARE_UVERBS_WRITE(
3757                         IB_USER_VERBS_CMD_DESTROY_CQ,
3758                         ib_uverbs_destroy_cq,
3759                         UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_cq,
3760                                           struct ib_uverbs_destroy_cq_resp),
3761                         UAPI_DEF_METHOD_NEEDS_FN(destroy_cq)),
3762                 DECLARE_UVERBS_WRITE(
3763                         IB_USER_VERBS_CMD_POLL_CQ,
3764                         ib_uverbs_poll_cq,
3765                         UAPI_DEF_WRITE_IO(struct ib_uverbs_poll_cq,
3766                                           struct ib_uverbs_poll_cq_resp),
3767                         UAPI_DEF_METHOD_NEEDS_FN(poll_cq)),
3768                 DECLARE_UVERBS_WRITE(
3769                         IB_USER_VERBS_CMD_REQ_NOTIFY_CQ,
3770                         ib_uverbs_req_notify_cq,
3771                         UAPI_DEF_WRITE_I(struct ib_uverbs_req_notify_cq),
3772                         UAPI_DEF_METHOD_NEEDS_FN(req_notify_cq)),
3773                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_RESIZE_CQ,
3774                                      ib_uverbs_resize_cq,
3775                                      UAPI_DEF_WRITE_UDATA_IO(
3776                                              struct ib_uverbs_resize_cq,
3777                                              struct ib_uverbs_resize_cq_resp),
3778                                      UAPI_DEF_METHOD_NEEDS_FN(resize_cq)),
3779                 DECLARE_UVERBS_WRITE_EX(
3780                         IB_USER_VERBS_EX_CMD_CREATE_CQ,
3781                         ib_uverbs_ex_create_cq,
3782                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_cq,
3783                                              reserved,
3784                                              struct ib_uverbs_ex_create_cq_resp,
3785                                              response_length),
3786                         UAPI_DEF_METHOD_NEEDS_FN(create_cq)),
3787                 DECLARE_UVERBS_WRITE_EX(
3788                         IB_USER_VERBS_EX_CMD_MODIFY_CQ,
3789                         ib_uverbs_ex_modify_cq,
3790                         UAPI_DEF_WRITE_I(struct ib_uverbs_ex_modify_cq),
3791                         UAPI_DEF_METHOD_NEEDS_FN(create_cq))),
3792
3793         DECLARE_UVERBS_OBJECT(
3794                 UVERBS_OBJECT_DEVICE,
3795                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_GET_CONTEXT,
3796                                      ib_uverbs_get_context,
3797                                      UAPI_DEF_WRITE_UDATA_IO(
3798                                              struct ib_uverbs_get_context,
3799                                              struct ib_uverbs_get_context_resp)),
3800                 DECLARE_UVERBS_WRITE(
3801                         IB_USER_VERBS_CMD_QUERY_DEVICE,
3802                         ib_uverbs_query_device,
3803                         UAPI_DEF_WRITE_IO(struct ib_uverbs_query_device,
3804                                           struct ib_uverbs_query_device_resp)),
3805                 DECLARE_UVERBS_WRITE(
3806                         IB_USER_VERBS_CMD_QUERY_PORT,
3807                         ib_uverbs_query_port,
3808                         UAPI_DEF_WRITE_IO(struct ib_uverbs_query_port,
3809                                           struct ib_uverbs_query_port_resp),
3810                         UAPI_DEF_METHOD_NEEDS_FN(query_port)),
3811                 DECLARE_UVERBS_WRITE_EX(
3812                         IB_USER_VERBS_EX_CMD_QUERY_DEVICE,
3813                         ib_uverbs_ex_query_device,
3814                         UAPI_DEF_WRITE_IO_EX(
3815                                 struct ib_uverbs_ex_query_device,
3816                                 reserved,
3817                                 struct ib_uverbs_ex_query_device_resp,
3818                                 response_length),
3819                         UAPI_DEF_METHOD_NEEDS_FN(query_device)),
3820                 UAPI_DEF_OBJ_NEEDS_FN(alloc_ucontext),
3821                 UAPI_DEF_OBJ_NEEDS_FN(dealloc_ucontext)),
3822
3823         DECLARE_UVERBS_OBJECT(
3824                 UVERBS_OBJECT_FLOW,
3825                 DECLARE_UVERBS_WRITE_EX(
3826                         IB_USER_VERBS_EX_CMD_CREATE_FLOW,
3827                         ib_uverbs_ex_create_flow,
3828                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_create_flow,
3829                                              flow_attr,
3830                                              struct ib_uverbs_create_flow_resp,
3831                                              flow_handle),
3832                         UAPI_DEF_METHOD_NEEDS_FN(create_flow)),
3833                 DECLARE_UVERBS_WRITE_EX(
3834                         IB_USER_VERBS_EX_CMD_DESTROY_FLOW,
3835                         ib_uverbs_ex_destroy_flow,
3836                         UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_flow),
3837                         UAPI_DEF_METHOD_NEEDS_FN(destroy_flow))),
3838
3839         DECLARE_UVERBS_OBJECT(
3840                 UVERBS_OBJECT_MR,
3841                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_DEREG_MR,
3842                                      ib_uverbs_dereg_mr,
3843                                      UAPI_DEF_WRITE_I(struct ib_uverbs_dereg_mr),
3844                                      UAPI_DEF_METHOD_NEEDS_FN(dereg_mr)),
3845                 DECLARE_UVERBS_WRITE(
3846                         IB_USER_VERBS_CMD_REG_MR,
3847                         ib_uverbs_reg_mr,
3848                         UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_reg_mr,
3849                                                 struct ib_uverbs_reg_mr_resp),
3850                         UAPI_DEF_METHOD_NEEDS_FN(reg_user_mr)),
3851                 DECLARE_UVERBS_WRITE(
3852                         IB_USER_VERBS_CMD_REREG_MR,
3853                         ib_uverbs_rereg_mr,
3854                         UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_rereg_mr,
3855                                                 struct ib_uverbs_rereg_mr_resp),
3856                         UAPI_DEF_METHOD_NEEDS_FN(rereg_user_mr))),
3857
3858         DECLARE_UVERBS_OBJECT(
3859                 UVERBS_OBJECT_MW,
3860                 DECLARE_UVERBS_WRITE(
3861                         IB_USER_VERBS_CMD_ALLOC_MW,
3862                         ib_uverbs_alloc_mw,
3863                         UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_mw,
3864                                                 struct ib_uverbs_alloc_mw_resp),
3865                         UAPI_DEF_METHOD_NEEDS_FN(alloc_mw)),
3866                 DECLARE_UVERBS_WRITE(
3867                         IB_USER_VERBS_CMD_DEALLOC_MW,
3868                         ib_uverbs_dealloc_mw,
3869                         UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_mw),
3870                         UAPI_DEF_METHOD_NEEDS_FN(dealloc_mw))),
3871
3872         DECLARE_UVERBS_OBJECT(
3873                 UVERBS_OBJECT_PD,
3874                 DECLARE_UVERBS_WRITE(
3875                         IB_USER_VERBS_CMD_ALLOC_PD,
3876                         ib_uverbs_alloc_pd,
3877                         UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_pd,
3878                                                 struct ib_uverbs_alloc_pd_resp),
3879                         UAPI_DEF_METHOD_NEEDS_FN(alloc_pd)),
3880                 DECLARE_UVERBS_WRITE(
3881                         IB_USER_VERBS_CMD_DEALLOC_PD,
3882                         ib_uverbs_dealloc_pd,
3883                         UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_pd),
3884                         UAPI_DEF_METHOD_NEEDS_FN(dealloc_pd))),
3885
3886         DECLARE_UVERBS_OBJECT(
3887                 UVERBS_OBJECT_QP,
3888                 DECLARE_UVERBS_WRITE(
3889                         IB_USER_VERBS_CMD_ATTACH_MCAST,
3890                         ib_uverbs_attach_mcast,
3891                         UAPI_DEF_WRITE_I(struct ib_uverbs_attach_mcast),
3892                         UAPI_DEF_METHOD_NEEDS_FN(attach_mcast),
3893                         UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)),
3894                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_QP,
3895                                      ib_uverbs_create_qp,
3896                                      UAPI_DEF_WRITE_UDATA_IO(
3897                                              struct ib_uverbs_create_qp,
3898                                              struct ib_uverbs_create_qp_resp),
3899                                      UAPI_DEF_METHOD_NEEDS_FN(create_qp)),
3900                 DECLARE_UVERBS_WRITE(
3901                         IB_USER_VERBS_CMD_DESTROY_QP,
3902                         ib_uverbs_destroy_qp,
3903                         UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_qp,
3904                                           struct ib_uverbs_destroy_qp_resp),
3905                         UAPI_DEF_METHOD_NEEDS_FN(destroy_qp)),
3906                 DECLARE_UVERBS_WRITE(
3907                         IB_USER_VERBS_CMD_DETACH_MCAST,
3908                         ib_uverbs_detach_mcast,
3909                         UAPI_DEF_WRITE_I(struct ib_uverbs_detach_mcast),
3910                         UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)),
3911                 DECLARE_UVERBS_WRITE(
3912                         IB_USER_VERBS_CMD_MODIFY_QP,
3913                         ib_uverbs_modify_qp,
3914                         UAPI_DEF_WRITE_I(struct ib_uverbs_modify_qp),
3915                         UAPI_DEF_METHOD_NEEDS_FN(modify_qp)),
3916                 DECLARE_UVERBS_WRITE(
3917                         IB_USER_VERBS_CMD_POST_RECV,
3918                         ib_uverbs_post_recv,
3919                         UAPI_DEF_WRITE_IO(struct ib_uverbs_post_recv,
3920                                           struct ib_uverbs_post_recv_resp),
3921                         UAPI_DEF_METHOD_NEEDS_FN(post_recv)),
3922                 DECLARE_UVERBS_WRITE(
3923                         IB_USER_VERBS_CMD_POST_SEND,
3924                         ib_uverbs_post_send,
3925                         UAPI_DEF_WRITE_IO(struct ib_uverbs_post_send,
3926                                           struct ib_uverbs_post_send_resp),
3927                         UAPI_DEF_METHOD_NEEDS_FN(post_send)),
3928                 DECLARE_UVERBS_WRITE(
3929                         IB_USER_VERBS_CMD_QUERY_QP,
3930                         ib_uverbs_query_qp,
3931                         UAPI_DEF_WRITE_IO(struct ib_uverbs_query_qp,
3932                                           struct ib_uverbs_query_qp_resp),
3933                         UAPI_DEF_METHOD_NEEDS_FN(query_qp)),
3934                 DECLARE_UVERBS_WRITE_EX(
3935                         IB_USER_VERBS_EX_CMD_CREATE_QP,
3936                         ib_uverbs_ex_create_qp,
3937                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_qp,
3938                                              comp_mask,
3939                                              struct ib_uverbs_ex_create_qp_resp,
3940                                              response_length),
3941                         UAPI_DEF_METHOD_NEEDS_FN(create_qp)),
3942                 DECLARE_UVERBS_WRITE_EX(
3943                         IB_USER_VERBS_EX_CMD_MODIFY_QP,
3944                         ib_uverbs_ex_modify_qp,
3945                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_modify_qp,
3946                                              base,
3947                                              struct ib_uverbs_ex_modify_qp_resp,
3948                                              response_length),
3949                         UAPI_DEF_METHOD_NEEDS_FN(modify_qp))),
3950
3951         DECLARE_UVERBS_OBJECT(
3952                 UVERBS_OBJECT_RWQ_IND_TBL,
3953                 DECLARE_UVERBS_WRITE_EX(
3954                         IB_USER_VERBS_EX_CMD_CREATE_RWQ_IND_TBL,
3955                         ib_uverbs_ex_create_rwq_ind_table,
3956                         UAPI_DEF_WRITE_IO_EX(
3957                                 struct ib_uverbs_ex_create_rwq_ind_table,
3958                                 log_ind_tbl_size,
3959                                 struct ib_uverbs_ex_create_rwq_ind_table_resp,
3960                                 ind_tbl_num),
3961                         UAPI_DEF_METHOD_NEEDS_FN(create_rwq_ind_table)),
3962                 DECLARE_UVERBS_WRITE_EX(
3963                         IB_USER_VERBS_EX_CMD_DESTROY_RWQ_IND_TBL,
3964                         ib_uverbs_ex_destroy_rwq_ind_table,
3965                         UAPI_DEF_WRITE_I(
3966                                 struct ib_uverbs_ex_destroy_rwq_ind_table),
3967                         UAPI_DEF_METHOD_NEEDS_FN(destroy_rwq_ind_table))),
3968
3969         DECLARE_UVERBS_OBJECT(
3970                 UVERBS_OBJECT_WQ,
3971                 DECLARE_UVERBS_WRITE_EX(
3972                         IB_USER_VERBS_EX_CMD_CREATE_WQ,
3973                         ib_uverbs_ex_create_wq,
3974                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_wq,
3975                                              max_sge,
3976                                              struct ib_uverbs_ex_create_wq_resp,
3977                                              wqn),
3978                         UAPI_DEF_METHOD_NEEDS_FN(create_wq)),
3979                 DECLARE_UVERBS_WRITE_EX(
3980                         IB_USER_VERBS_EX_CMD_DESTROY_WQ,
3981                         ib_uverbs_ex_destroy_wq,
3982                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_destroy_wq,
3983                                              wq_handle,
3984                                              struct ib_uverbs_ex_destroy_wq_resp,
3985                                              reserved),
3986                         UAPI_DEF_METHOD_NEEDS_FN(destroy_wq)),
3987                 DECLARE_UVERBS_WRITE_EX(
3988                         IB_USER_VERBS_EX_CMD_MODIFY_WQ,
3989                         ib_uverbs_ex_modify_wq,
3990                         UAPI_DEF_WRITE_I_EX(struct ib_uverbs_ex_modify_wq,
3991                                             curr_wq_state),
3992                         UAPI_DEF_METHOD_NEEDS_FN(modify_wq))),
3993
3994         DECLARE_UVERBS_OBJECT(
3995                 UVERBS_OBJECT_SRQ,
3996                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_SRQ,
3997                                      ib_uverbs_create_srq,
3998                                      UAPI_DEF_WRITE_UDATA_IO(
3999                                              struct ib_uverbs_create_srq,
4000                                              struct ib_uverbs_create_srq_resp),
4001                                      UAPI_DEF_METHOD_NEEDS_FN(create_srq)),
4002                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_XSRQ,
4003                                      ib_uverbs_create_xsrq,
4004                                      UAPI_DEF_WRITE_UDATA_IO(
4005                                              struct ib_uverbs_create_xsrq,
4006                                              struct ib_uverbs_create_srq_resp),
4007                                      UAPI_DEF_METHOD_NEEDS_FN(create_srq)),
4008                 DECLARE_UVERBS_WRITE(
4009                         IB_USER_VERBS_CMD_DESTROY_SRQ,
4010                         ib_uverbs_destroy_srq,
4011                         UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_srq,
4012                                           struct ib_uverbs_destroy_srq_resp),
4013                         UAPI_DEF_METHOD_NEEDS_FN(destroy_srq)),
4014                 DECLARE_UVERBS_WRITE(
4015                         IB_USER_VERBS_CMD_MODIFY_SRQ,
4016                         ib_uverbs_modify_srq,
4017                         UAPI_DEF_WRITE_UDATA_I(struct ib_uverbs_modify_srq),
4018                         UAPI_DEF_METHOD_NEEDS_FN(modify_srq)),
4019                 DECLARE_UVERBS_WRITE(
4020                         IB_USER_VERBS_CMD_POST_SRQ_RECV,
4021                         ib_uverbs_post_srq_recv,
4022                         UAPI_DEF_WRITE_IO(struct ib_uverbs_post_srq_recv,
4023                                           struct ib_uverbs_post_srq_recv_resp),
4024                         UAPI_DEF_METHOD_NEEDS_FN(post_srq_recv)),
4025                 DECLARE_UVERBS_WRITE(
4026                         IB_USER_VERBS_CMD_QUERY_SRQ,
4027                         ib_uverbs_query_srq,
4028                         UAPI_DEF_WRITE_IO(struct ib_uverbs_query_srq,
4029                                           struct ib_uverbs_query_srq_resp),
4030                         UAPI_DEF_METHOD_NEEDS_FN(query_srq))),
4031
4032         DECLARE_UVERBS_OBJECT(
4033                 UVERBS_OBJECT_XRCD,
4034                 DECLARE_UVERBS_WRITE(
4035                         IB_USER_VERBS_CMD_CLOSE_XRCD,
4036                         ib_uverbs_close_xrcd,
4037                         UAPI_DEF_WRITE_I(struct ib_uverbs_close_xrcd),
4038                         UAPI_DEF_METHOD_NEEDS_FN(dealloc_xrcd)),
4039                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_QP,
4040                                      ib_uverbs_open_qp,
4041                                      UAPI_DEF_WRITE_UDATA_IO(
4042                                              struct ib_uverbs_open_qp,
4043                                              struct ib_uverbs_create_qp_resp)),
4044                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_XRCD,
4045                                      ib_uverbs_open_xrcd,
4046                                      UAPI_DEF_WRITE_UDATA_IO(
4047                                              struct ib_uverbs_open_xrcd,
4048                                              struct ib_uverbs_open_xrcd_resp),
4049                                      UAPI_DEF_METHOD_NEEDS_FN(alloc_xrcd))),
4050
4051         {},
4052 };