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 (uverbs_attr_is_valid(attrs, UVERBS_ATTR_CORE_OUT))
  64                 return uverbs_copy_to_struct_or_zero(
  65                         attrs, UVERBS_ATTR_CORE_OUT, resp, resp_len);
  66
  67         if (copy_to_user(attrs->ucore.outbuf, resp,
  68                          min(attrs->ucore.outlen, resp_len)))
  69                 return -EFAULT;
  70
  71         if (resp_len < attrs->ucore.outlen) {
  72                 /*
  73                  * Zero fill any extra memory that user
  74                  * space might have provided.
  75                  */
  76                 ret = clear_user(attrs->ucore.outbuf + resp_len,
  77                                  attrs->ucore.outlen - resp_len);
  78                 if (ret)
  79                         return -EFAULT;
  80         }
  81
  82         return 0;
  83 }
  84
  85 /*
  86  * Copy a request from userspace. If the provided 'req' is larger than the
  87  * user buffer then the user buffer is zero extended into the 'req'. If 'req'
  88  * is smaller than the user buffer then the uncopied bytes in the user buffer
  89  * must be zero.
  90  */
  91 static int uverbs_request(struct uverbs_attr_bundle *attrs, void *req,
  92                           size_t req_len)
  93 {
  94         if (copy_from_user(req, attrs->ucore.inbuf,
  95                            min(attrs->ucore.inlen, req_len)))
  96                 return -EFAULT;
  97
  98         if (attrs->ucore.inlen < req_len) {
  99                 memset(req + attrs->ucore.inlen, 0,
 100                        req_len - attrs->ucore.inlen);
 101         } else if (attrs->ucore.inlen > req_len) {
 102                 if (!ib_is_buffer_cleared(attrs->ucore.inbuf + req_len,
 103                                           attrs->ucore.inlen - req_len))
 104                         return -EOPNOTSUPP;
 105         }
 106         return 0;
 107 }
 108
 109 /*
 110  * Generate the value for the 'response_length' protocol used by write_ex.
 111  * This is the number of bytes the kernel actually wrote. Userspace can use
 112  * this to detect what structure members in the response the kernel
 113  * understood.
 114  */
 115 static u32 uverbs_response_length(struct uverbs_attr_bundle *attrs,
 116                                   size_t resp_len)
 117 {
 118         return min_t(size_t, attrs->ucore.outlen, resp_len);
 119 }
 120
 121 /*
 122  * The iterator version of the request interface is for handlers that need to
 123  * step over a flex array at the end of a command header.
 124  */
 125 struct uverbs_req_iter {
 126         const void __user *cur;
 127         const void __user *end;
 128 };
 129
 130 static int uverbs_request_start(struct uverbs_attr_bundle *attrs,
 131                                 struct uverbs_req_iter *iter,
 132                                 void *req,
 133                                 size_t req_len)
 134 {
 135         if (attrs->ucore.inlen < req_len)
 136                 return -ENOSPC;
 137
 138         if (copy_from_user(req, attrs->ucore.inbuf, req_len))
 139                 return -EFAULT;
 140
 141         iter->cur = attrs->ucore.inbuf + req_len;
 142         iter->end = attrs->ucore.inbuf + attrs->ucore.inlen;
 143         return 0;
 144 }
 145
 146 static int uverbs_request_next(struct uverbs_req_iter *iter, void *val,
 147                                size_t len)
 148 {
 149         if (iter->cur + len > iter->end)
 150                 return -ENOSPC;
 151
 152         if (copy_from_user(val, iter->cur, len))
 153                 return -EFAULT;
 154
 155         iter->cur += len;
 156         return 0;
 157 }
 158
 159 static const void __user *uverbs_request_next_ptr(struct uverbs_req_iter *iter,
 160                                                   size_t len)
 161 {
 162         const void __user *res = iter->cur;
 163
 164         if (iter->cur + len > iter->end)
 165                 return ERR_PTR(-ENOSPC);
 166         iter->cur += len;
 167         return res;
 168 }
 169
 170 static int uverbs_request_finish(struct uverbs_req_iter *iter)
 171 {
 172         if (!ib_is_buffer_cleared(iter->cur, iter->end - iter->cur))
 173                 return -EOPNOTSUPP;
 174         return 0;
 175 }
 176
 177 static struct ib_uverbs_completion_event_file *
 178 _ib_uverbs_lookup_comp_file(s32 fd, const struct uverbs_attr_bundle *attrs)
 179 {
 180         struct ib_uobject *uobj = ufd_get_read(UVERBS_OBJECT_COMP_CHANNEL,
 181                                                fd, attrs);
 182
 183         if (IS_ERR(uobj))
 184                 return (void *)uobj;
 185
 186         uverbs_uobject_get(uobj);
 187         uobj_put_read(uobj);
 188
 189         return container_of(uobj, struct ib_uverbs_completion_event_file,
 190                             uobj);
 191 }
 192 #define ib_uverbs_lookup_comp_file(_fd, _ufile)                                \
 193         _ib_uverbs_lookup_comp_file((_fd)*typecheck(s32, _fd), _ufile)
 194
 195 static int ib_uverbs_get_context(struct uverbs_attr_bundle *attrs)
 196 {
 197         struct ib_uverbs_file *file = attrs->ufile;
 198         struct ib_uverbs_get_context      cmd;
 199         struct ib_uverbs_get_context_resp resp;
 200         struct ib_ucontext               *ucontext;
 201         struct file                      *filp;
 202         struct ib_rdmacg_object          cg_obj;
 203         struct ib_device *ib_dev;
 204         int ret;
 205
 206         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 207         if (ret)
 208                 return ret;
 209
 210         mutex_lock(&file->ucontext_lock);
 211         ib_dev = srcu_dereference(file->device->ib_dev,
 212                                   &file->device->disassociate_srcu);
 213         if (!ib_dev) {
 214                 ret = -EIO;
 215                 goto err;
 216         }
 217
 218         if (file->ucontext) {
 219                 ret = -EINVAL;
 220                 goto err;
 221         }
 222
 223         ret = ib_rdmacg_try_charge(&cg_obj, ib_dev, RDMACG_RESOURCE_HCA_HANDLE);
 224         if (ret)
 225                 goto err;
 226
 227         ucontext = ib_dev->ops.alloc_ucontext(ib_dev, &attrs->driver_udata);
 228         if (IS_ERR(ucontext)) {
 229                 ret = PTR_ERR(ucontext);
 230                 goto err_alloc;
 231         }
 232
 233         ucontext->device = ib_dev;
 234         ucontext->cg_obj = cg_obj;
 235         /* ufile is required when some objects are released */
 236         ucontext->ufile = file;
 237
 238         ucontext->closing = false;
 239         ucontext->cleanup_retryable = false;
 240
 241 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
 242         mutex_init(&ucontext->per_mm_list_lock);
 243         INIT_LIST_HEAD(&ucontext->per_mm_list);
 244         if (!(ib_dev->attrs.device_cap_flags & IB_DEVICE_ON_DEMAND_PAGING))
 245                 ucontext->invalidate_range = NULL;
 246
 247 #endif
 248
 249         resp.num_comp_vectors = file->device->num_comp_vectors;
 250
 251         ret = get_unused_fd_flags(O_CLOEXEC);
 252         if (ret < 0)
 253                 goto err_free;
 254         resp.async_fd = ret;
 255
 256         filp = ib_uverbs_alloc_async_event_file(file, ib_dev);
 257         if (IS_ERR(filp)) {
 258                 ret = PTR_ERR(filp);
 259                 goto err_fd;
 260         }
 261
 262         ret = uverbs_response(attrs, &resp, sizeof(resp));
 263         if (ret)
 264                 goto err_file;
 265
 266         fd_install(resp.async_fd, filp);
 267
 268         ucontext->res.type = RDMA_RESTRACK_CTX;
 269         rdma_restrack_uadd(&ucontext->res);
 270
 271         /*
 272          * Make sure that ib_uverbs_get_ucontext() sees the pointer update
 273          * only after all writes to setup the ucontext have completed
 274          */
 275         smp_store_release(&file->ucontext, ucontext);
 276
 277         mutex_unlock(&file->ucontext_lock);
 278
 279         return 0;
 280
 281 err_file:
 282         ib_uverbs_free_async_event_file(file);
 283         fput(filp);
 284
 285 err_fd:
 286         put_unused_fd(resp.async_fd);
 287
 288 err_free:
 289         ib_dev->ops.dealloc_ucontext(ucontext);
 290
 291 err_alloc:
 292         ib_rdmacg_uncharge(&cg_obj, ib_dev, RDMACG_RESOURCE_HCA_HANDLE);
 293
 294 err:
 295         mutex_unlock(&file->ucontext_lock);
 296         return ret;
 297 }
 298
 299 static void copy_query_dev_fields(struct ib_ucontext *ucontext,
 300                                   struct ib_uverbs_query_device_resp *resp,
 301                                   struct ib_device_attr *attr)
 302 {
 303         struct ib_device *ib_dev = ucontext->device;
 304
 305         resp->fw_ver            = attr->fw_ver;
 306         resp->node_guid         = ib_dev->node_guid;
 307         resp->sys_image_guid    = attr->sys_image_guid;
 308         resp->max_mr_size       = attr->max_mr_size;
 309         resp->page_size_cap     = attr->page_size_cap;
 310         resp->vendor_id         = attr->vendor_id;
 311         resp->vendor_part_id    = attr->vendor_part_id;
 312         resp->hw_ver            = attr->hw_ver;
 313         resp->max_qp            = attr->max_qp;
 314         resp->max_qp_wr         = attr->max_qp_wr;
 315         resp->device_cap_flags  = lower_32_bits(attr->device_cap_flags);
 316         resp->max_sge           = min(attr->max_send_sge, attr->max_recv_sge);
 317         resp->max_sge_rd        = attr->max_sge_rd;
 318         resp->max_cq            = attr->max_cq;
 319         resp->max_cqe           = attr->max_cqe;
 320         resp->max_mr            = attr->max_mr;
 321         resp->max_pd            = attr->max_pd;
 322         resp->max_qp_rd_atom    = attr->max_qp_rd_atom;
 323         resp->max_ee_rd_atom    = attr->max_ee_rd_atom;
 324         resp->max_res_rd_atom   = attr->max_res_rd_atom;
 325         resp->max_qp_init_rd_atom       = attr->max_qp_init_rd_atom;
 326         resp->max_ee_init_rd_atom       = attr->max_ee_init_rd_atom;
 327         resp->atomic_cap                = attr->atomic_cap;
 328         resp->max_ee                    = attr->max_ee;
 329         resp->max_rdd                   = attr->max_rdd;
 330         resp->max_mw                    = attr->max_mw;
 331         resp->max_raw_ipv6_qp           = attr->max_raw_ipv6_qp;
 332         resp->max_raw_ethy_qp           = attr->max_raw_ethy_qp;
 333         resp->max_mcast_grp             = attr->max_mcast_grp;
 334         resp->max_mcast_qp_attach       = attr->max_mcast_qp_attach;
 335         resp->max_total_mcast_qp_attach = attr->max_total_mcast_qp_attach;
 336         resp->max_ah                    = attr->max_ah;
 337         resp->max_fmr                   = attr->max_fmr;
 338         resp->max_map_per_fmr           = attr->max_map_per_fmr;
 339         resp->max_srq                   = attr->max_srq;
 340         resp->max_srq_wr                = attr->max_srq_wr;
 341         resp->max_srq_sge               = attr->max_srq_sge;
 342         resp->max_pkeys                 = attr->max_pkeys;
 343         resp->local_ca_ack_delay        = attr->local_ca_ack_delay;
 344         resp->phys_port_cnt             = ib_dev->phys_port_cnt;
 345 }
 346
 347 static int ib_uverbs_query_device(struct uverbs_attr_bundle *attrs)
 348 {
 349         struct ib_uverbs_query_device      cmd;
 350         struct ib_uverbs_query_device_resp resp;
 351         struct ib_ucontext *ucontext;
 352         int ret;
 353
 354         ucontext = ib_uverbs_get_ucontext(attrs);
 355         if (IS_ERR(ucontext))
 356                 return PTR_ERR(ucontext);
 357
 358         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 359         if (ret)
 360                 return ret;
 361
 362         memset(&resp, 0, sizeof resp);
 363         copy_query_dev_fields(ucontext, &resp, &ucontext->device->attrs);
 364
 365         return uverbs_response(attrs, &resp, sizeof(resp));
 366 }
 367
 368 static int ib_uverbs_query_port(struct uverbs_attr_bundle *attrs)
 369 {
 370         struct ib_uverbs_query_port      cmd;
 371         struct ib_uverbs_query_port_resp resp;
 372         struct ib_port_attr              attr;
 373         int                              ret;
 374         struct ib_ucontext *ucontext;
 375         struct ib_device *ib_dev;
 376
 377         ucontext = ib_uverbs_get_ucontext(attrs);
 378         if (IS_ERR(ucontext))
 379                 return PTR_ERR(ucontext);
 380         ib_dev = ucontext->device;
 381
 382         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 383         if (ret)
 384                 return ret;
 385
 386         ret = ib_query_port(ib_dev, cmd.port_num, &attr);
 387         if (ret)
 388                 return ret;
 389
 390         memset(&resp, 0, sizeof resp);
 391         copy_port_attr_to_resp(&attr, &resp, ib_dev, cmd.port_num);
 392
 393         return uverbs_response(attrs, &resp, sizeof(resp));
 394 }
 395
 396 static int ib_uverbs_alloc_pd(struct uverbs_attr_bundle *attrs)
 397 {
 398         struct ib_uverbs_alloc_pd      cmd;
 399         struct ib_uverbs_alloc_pd_resp resp;
 400         struct ib_uobject             *uobj;
 401         struct ib_pd                  *pd;
 402         int                            ret;
 403         struct ib_device *ib_dev;
 404
 405         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 406         if (ret)
 407                 return ret;
 408
 409         uobj = uobj_alloc(UVERBS_OBJECT_PD, attrs, &ib_dev);
 410         if (IS_ERR(uobj))
 411                 return PTR_ERR(uobj);
 412
 413         pd = ib_dev->ops.alloc_pd(ib_dev, uobj->context, &attrs->driver_udata);
 414         if (IS_ERR(pd)) {
 415                 ret = PTR_ERR(pd);
 416                 goto err;
 417         }
 418
 419         pd->device  = ib_dev;
 420         pd->uobject = uobj;
 421         pd->__internal_mr = NULL;
 422         atomic_set(&pd->usecnt, 0);
 423
 424         uobj->object = pd;
 425         memset(&resp, 0, sizeof resp);
 426         resp.pd_handle = uobj->id;
 427         pd->res.type = RDMA_RESTRACK_PD;
 428         rdma_restrack_uadd(&pd->res);
 429
 430         ret = uverbs_response(attrs, &resp, sizeof(resp));
 431         if (ret)
 432                 goto err_copy;
 433
 434         return uobj_alloc_commit(uobj);
 435
 436 err_copy:
 437         ib_dealloc_pd(pd);
 438
 439 err:
 440         uobj_alloc_abort(uobj);
 441         return ret;
 442 }
 443
 444 static int ib_uverbs_dealloc_pd(struct uverbs_attr_bundle *attrs)
 445 {
 446         struct ib_uverbs_dealloc_pd cmd;
 447         int ret;
 448
 449         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 450         if (ret)
 451                 return ret;
 452
 453         return uobj_perform_destroy(UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
 454 }
 455
 456 struct xrcd_table_entry {
 457         struct rb_node  node;
 458         struct ib_xrcd *xrcd;
 459         struct inode   *inode;
 460 };
 461
 462 static int xrcd_table_insert(struct ib_uverbs_device *dev,
 463                             struct inode *inode,
 464                             struct ib_xrcd *xrcd)
 465 {
 466         struct xrcd_table_entry *entry, *scan;
 467         struct rb_node **p = &dev->xrcd_tree.rb_node;
 468         struct rb_node *parent = NULL;
 469
 470         entry = kmalloc(sizeof *entry, GFP_KERNEL);
 471         if (!entry)
 472                 return -ENOMEM;
 473
 474         entry->xrcd  = xrcd;
 475         entry->inode = inode;
 476
 477         while (*p) {
 478                 parent = *p;
 479                 scan = rb_entry(parent, struct xrcd_table_entry, node);
 480
 481                 if (inode < scan->inode) {
 482                         p = &(*p)->rb_left;
 483                 } else if (inode > scan->inode) {
 484                         p = &(*p)->rb_right;
 485                 } else {
 486                         kfree(entry);
 487                         return -EEXIST;
 488                 }
 489         }
 490
 491         rb_link_node(&entry->node, parent, p);
 492         rb_insert_color(&entry->node, &dev->xrcd_tree);
 493         igrab(inode);
 494         return 0;
 495 }
 496
 497 static struct xrcd_table_entry *xrcd_table_search(struct ib_uverbs_device *dev,
 498                                                   struct inode *inode)
 499 {
 500         struct xrcd_table_entry *entry;
 501         struct rb_node *p = dev->xrcd_tree.rb_node;
 502
 503         while (p) {
 504                 entry = rb_entry(p, struct xrcd_table_entry, node);
 505
 506                 if (inode < entry->inode)
 507                         p = p->rb_left;
 508                 else if (inode > entry->inode)
 509                         p = p->rb_right;
 510                 else
 511                         return entry;
 512         }
 513
 514         return NULL;
 515 }
 516
 517 static struct ib_xrcd *find_xrcd(struct ib_uverbs_device *dev, struct inode *inode)
 518 {
 519         struct xrcd_table_entry *entry;
 520
 521         entry = xrcd_table_search(dev, inode);
 522         if (!entry)
 523                 return NULL;
 524
 525         return entry->xrcd;
 526 }
 527
 528 static void xrcd_table_delete(struct ib_uverbs_device *dev,
 529                               struct inode *inode)
 530 {
 531         struct xrcd_table_entry *entry;
 532
 533         entry = xrcd_table_search(dev, inode);
 534         if (entry) {
 535                 iput(inode);
 536                 rb_erase(&entry->node, &dev->xrcd_tree);
 537                 kfree(entry);
 538         }
 539 }
 540
 541 static int ib_uverbs_open_xrcd(struct uverbs_attr_bundle *attrs)
 542 {
 543         struct ib_uverbs_device *ibudev = attrs->ufile->device;
 544         struct ib_uverbs_open_xrcd      cmd;
 545         struct ib_uverbs_open_xrcd_resp resp;
 546         struct ib_uxrcd_object         *obj;
 547         struct ib_xrcd                 *xrcd = NULL;
 548         struct fd                       f = {NULL, 0};
 549         struct inode                   *inode = NULL;
 550         int                             ret = 0;
 551         int                             new_xrcd = 0;
 552         struct ib_device *ib_dev;
 553
 554         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 555         if (ret)
 556                 return ret;
 557
 558         mutex_lock(&ibudev->xrcd_tree_mutex);
 559
 560         if (cmd.fd != -1) {
 561                 /* search for file descriptor */
 562                 f = fdget(cmd.fd);
 563                 if (!f.file) {
 564                         ret = -EBADF;
 565                         goto err_tree_mutex_unlock;
 566                 }
 567
 568                 inode = file_inode(f.file);
 569                 xrcd = find_xrcd(ibudev, inode);
 570                 if (!xrcd && !(cmd.oflags & O_CREAT)) {
 571                         /* no file descriptor. Need CREATE flag */
 572                         ret = -EAGAIN;
 573                         goto err_tree_mutex_unlock;
 574                 }
 575
 576                 if (xrcd && cmd.oflags & O_EXCL) {
 577                         ret = -EINVAL;
 578                         goto err_tree_mutex_unlock;
 579                 }
 580         }
 581
 582         obj = (struct ib_uxrcd_object *)uobj_alloc(UVERBS_OBJECT_XRCD, attrs,
 583                                                    &ib_dev);
 584         if (IS_ERR(obj)) {
 585                 ret = PTR_ERR(obj);
 586                 goto err_tree_mutex_unlock;
 587         }
 588
 589         if (!xrcd) {
 590                 xrcd = ib_dev->ops.alloc_xrcd(ib_dev, obj->uobject.context,
 591                                               &attrs->driver_udata);
 592                 if (IS_ERR(xrcd)) {
 593                         ret = PTR_ERR(xrcd);
 594                         goto err;
 595                 }
 596
 597                 xrcd->inode   = inode;
 598                 xrcd->device  = ib_dev;
 599                 atomic_set(&xrcd->usecnt, 0);
 600                 mutex_init(&xrcd->tgt_qp_mutex);
 601                 INIT_LIST_HEAD(&xrcd->tgt_qp_list);
 602                 new_xrcd = 1;
 603         }
 604
 605         atomic_set(&obj->refcnt, 0);
 606         obj->uobject.object = xrcd;
 607         memset(&resp, 0, sizeof resp);
 608         resp.xrcd_handle = obj->uobject.id;
 609
 610         if (inode) {
 611                 if (new_xrcd) {
 612                         /* create new inode/xrcd table entry */
 613                         ret = xrcd_table_insert(ibudev, inode, xrcd);
 614                         if (ret)
 615                                 goto err_dealloc_xrcd;
 616                 }
 617                 atomic_inc(&xrcd->usecnt);
 618         }
 619
 620         ret = uverbs_response(attrs, &resp, sizeof(resp));
 621         if (ret)
 622                 goto err_copy;
 623
 624         if (f.file)
 625                 fdput(f);
 626
 627         mutex_unlock(&ibudev->xrcd_tree_mutex);
 628
 629         return uobj_alloc_commit(&obj->uobject);
 630
 631 err_copy:
 632         if (inode) {
 633                 if (new_xrcd)
 634                         xrcd_table_delete(ibudev, inode);
 635                 atomic_dec(&xrcd->usecnt);
 636         }
 637
 638 err_dealloc_xrcd:
 639         ib_dealloc_xrcd(xrcd);
 640
 641 err:
 642         uobj_alloc_abort(&obj->uobject);
 643
 644 err_tree_mutex_unlock:
 645         if (f.file)
 646                 fdput(f);
 647
 648         mutex_unlock(&ibudev->xrcd_tree_mutex);
 649
 650         return ret;
 651 }
 652
 653 static int ib_uverbs_close_xrcd(struct uverbs_attr_bundle *attrs)
 654 {
 655         struct ib_uverbs_close_xrcd cmd;
 656         int ret;
 657
 658         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 659         if (ret)
 660                 return ret;
 661
 662         return uobj_perform_destroy(UVERBS_OBJECT_XRCD, cmd.xrcd_handle, attrs);
 663 }
 664
 665 int ib_uverbs_dealloc_xrcd(struct ib_uobject *uobject,
 666                            struct ib_xrcd *xrcd,
 667                            enum rdma_remove_reason why)
 668 {
 669         struct inode *inode;
 670         int ret;
 671         struct ib_uverbs_device *dev = uobject->context->ufile->device;
 672
 673         inode = xrcd->inode;
 674         if (inode && !atomic_dec_and_test(&xrcd->usecnt))
 675                 return 0;
 676
 677         ret = ib_dealloc_xrcd(xrcd);
 678
 679         if (ib_is_destroy_retryable(ret, why, uobject)) {
 680                 atomic_inc(&xrcd->usecnt);
 681                 return ret;
 682         }
 683
 684         if (inode)
 685                 xrcd_table_delete(dev, inode);
 686
 687         return ret;
 688 }
 689
 690 static int ib_uverbs_reg_mr(struct uverbs_attr_bundle *attrs)
 691 {
 692         struct ib_uverbs_reg_mr      cmd;
 693         struct ib_uverbs_reg_mr_resp resp;
 694         struct ib_uobject           *uobj;
 695         struct ib_pd                *pd;
 696         struct ib_mr                *mr;
 697         int                          ret;
 698         struct ib_device *ib_dev;
 699
 700         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 701         if (ret)
 702                 return ret;
 703
 704         if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
 705                 return -EINVAL;
 706
 707         ret = ib_check_mr_access(cmd.access_flags);
 708         if (ret)
 709                 return ret;
 710
 711         uobj = uobj_alloc(UVERBS_OBJECT_MR, attrs, &ib_dev);
 712         if (IS_ERR(uobj))
 713                 return PTR_ERR(uobj);
 714
 715         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
 716         if (!pd) {
 717                 ret = -EINVAL;
 718                 goto err_free;
 719         }
 720
 721         if (cmd.access_flags & IB_ACCESS_ON_DEMAND) {
 722                 if (!(pd->device->attrs.device_cap_flags &
 723                       IB_DEVICE_ON_DEMAND_PAGING)) {
 724                         pr_debug("ODP support not available\n");
 725                         ret = -EINVAL;
 726                         goto err_put;
 727                 }
 728         }
 729
 730         mr = pd->device->ops.reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
 731                                          cmd.access_flags,
 732                                          &attrs->driver_udata);
 733         if (IS_ERR(mr)) {
 734                 ret = PTR_ERR(mr);
 735                 goto err_put;
 736         }
 737
 738         mr->device  = pd->device;
 739         mr->pd      = pd;
 740         mr->dm      = NULL;
 741         mr->uobject = uobj;
 742         atomic_inc(&pd->usecnt);
 743         mr->res.type = RDMA_RESTRACK_MR;
 744         rdma_restrack_uadd(&mr->res);
 745
 746         uobj->object = mr;
 747
 748         memset(&resp, 0, sizeof resp);
 749         resp.lkey      = mr->lkey;
 750         resp.rkey      = mr->rkey;
 751         resp.mr_handle = uobj->id;
 752
 753         ret = uverbs_response(attrs, &resp, sizeof(resp));
 754         if (ret)
 755                 goto err_copy;
 756
 757         uobj_put_obj_read(pd);
 758
 759         return uobj_alloc_commit(uobj);
 760
 761 err_copy:
 762         ib_dereg_mr(mr);
 763
 764 err_put:
 765         uobj_put_obj_read(pd);
 766
 767 err_free:
 768         uobj_alloc_abort(uobj);
 769         return ret;
 770 }
 771
 772 static int ib_uverbs_rereg_mr(struct uverbs_attr_bundle *attrs)
 773 {
 774         struct ib_uverbs_rereg_mr      cmd;
 775         struct ib_uverbs_rereg_mr_resp resp;
 776         struct ib_pd                *pd = NULL;
 777         struct ib_mr                *mr;
 778         struct ib_pd                *old_pd;
 779         int                          ret;
 780         struct ib_uobject           *uobj;
 781
 782         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 783         if (ret)
 784                 return ret;
 785
 786         if (cmd.flags & ~IB_MR_REREG_SUPPORTED || !cmd.flags)
 787                 return -EINVAL;
 788
 789         if ((cmd.flags & IB_MR_REREG_TRANS) &&
 790             (!cmd.start || !cmd.hca_va || 0 >= cmd.length ||
 791              (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)))
 792                         return -EINVAL;
 793
 794         uobj = uobj_get_write(UVERBS_OBJECT_MR, cmd.mr_handle, attrs);
 795         if (IS_ERR(uobj))
 796                 return PTR_ERR(uobj);
 797
 798         mr = uobj->object;
 799
 800         if (mr->dm) {
 801                 ret = -EINVAL;
 802                 goto put_uobjs;
 803         }
 804
 805         if (cmd.flags & IB_MR_REREG_ACCESS) {
 806                 ret = ib_check_mr_access(cmd.access_flags);
 807                 if (ret)
 808                         goto put_uobjs;
 809         }
 810
 811         if (cmd.flags & IB_MR_REREG_PD) {
 812                 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle,
 813                                        attrs);
 814                 if (!pd) {
 815                         ret = -EINVAL;
 816                         goto put_uobjs;
 817                 }
 818         }
 819
 820         old_pd = mr->pd;
 821         ret = mr->device->ops.rereg_user_mr(mr, cmd.flags, cmd.start,
 822                                             cmd.length, cmd.hca_va,
 823                                             cmd.access_flags, pd,
 824                                             &attrs->driver_udata);
 825         if (!ret) {
 826                 if (cmd.flags & IB_MR_REREG_PD) {
 827                         atomic_inc(&pd->usecnt);
 828                         mr->pd = pd;
 829                         atomic_dec(&old_pd->usecnt);
 830                 }
 831         } else {
 832                 goto put_uobj_pd;
 833         }
 834
 835         memset(&resp, 0, sizeof(resp));
 836         resp.lkey      = mr->lkey;
 837         resp.rkey      = mr->rkey;
 838
 839         ret = uverbs_response(attrs, &resp, sizeof(resp));
 840
 841 put_uobj_pd:
 842         if (cmd.flags & IB_MR_REREG_PD)
 843                 uobj_put_obj_read(pd);
 844
 845 put_uobjs:
 846         uobj_put_write(uobj);
 847
 848         return ret;
 849 }
 850
 851 static int ib_uverbs_dereg_mr(struct uverbs_attr_bundle *attrs)
 852 {
 853         struct ib_uverbs_dereg_mr cmd;
 854         int ret;
 855
 856         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 857         if (ret)
 858                 return ret;
 859
 860         return uobj_perform_destroy(UVERBS_OBJECT_MR, cmd.mr_handle, attrs);
 861 }
 862
 863 static int ib_uverbs_alloc_mw(struct uverbs_attr_bundle *attrs)
 864 {
 865         struct ib_uverbs_alloc_mw      cmd;
 866         struct ib_uverbs_alloc_mw_resp resp;
 867         struct ib_uobject             *uobj;
 868         struct ib_pd                  *pd;
 869         struct ib_mw                  *mw;
 870         int                            ret;
 871         struct ib_device *ib_dev;
 872
 873         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 874         if (ret)
 875                 return ret;
 876
 877         uobj = uobj_alloc(UVERBS_OBJECT_MW, attrs, &ib_dev);
 878         if (IS_ERR(uobj))
 879                 return PTR_ERR(uobj);
 880
 881         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
 882         if (!pd) {
 883                 ret = -EINVAL;
 884                 goto err_free;
 885         }
 886
 887         mw = pd->device->ops.alloc_mw(pd, cmd.mw_type, &attrs->driver_udata);
 888         if (IS_ERR(mw)) {
 889                 ret = PTR_ERR(mw);
 890                 goto err_put;
 891         }
 892
 893         mw->device  = pd->device;
 894         mw->pd      = pd;
 895         mw->uobject = uobj;
 896         atomic_inc(&pd->usecnt);
 897
 898         uobj->object = mw;
 899
 900         memset(&resp, 0, sizeof(resp));
 901         resp.rkey      = mw->rkey;
 902         resp.mw_handle = uobj->id;
 903
 904         ret = uverbs_response(attrs, &resp, sizeof(resp));
 905         if (ret)
 906                 goto err_copy;
 907
 908         uobj_put_obj_read(pd);
 909         return uobj_alloc_commit(uobj);
 910
 911 err_copy:
 912         uverbs_dealloc_mw(mw);
 913 err_put:
 914         uobj_put_obj_read(pd);
 915 err_free:
 916         uobj_alloc_abort(uobj);
 917         return ret;
 918 }
 919
 920 static int ib_uverbs_dealloc_mw(struct uverbs_attr_bundle *attrs)
 921 {
 922         struct ib_uverbs_dealloc_mw cmd;
 923         int ret;
 924
 925         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 926         if (ret)
 927                 return ret;
 928
 929         return uobj_perform_destroy(UVERBS_OBJECT_MW, cmd.mw_handle, attrs);
 930 }
 931
 932 static int ib_uverbs_create_comp_channel(struct uverbs_attr_bundle *attrs)
 933 {
 934         struct ib_uverbs_create_comp_channel       cmd;
 935         struct ib_uverbs_create_comp_channel_resp  resp;
 936         struct ib_uobject                         *uobj;
 937         struct ib_uverbs_completion_event_file    *ev_file;
 938         struct ib_device *ib_dev;
 939         int ret;
 940
 941         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 942         if (ret)
 943                 return ret;
 944
 945         uobj = uobj_alloc(UVERBS_OBJECT_COMP_CHANNEL, attrs, &ib_dev);
 946         if (IS_ERR(uobj))
 947                 return PTR_ERR(uobj);
 948
 949         resp.fd = uobj->id;
 950
 951         ev_file = container_of(uobj, struct ib_uverbs_completion_event_file,
 952                                uobj);
 953         ib_uverbs_init_event_queue(&ev_file->ev_queue);
 954
 955         ret = uverbs_response(attrs, &resp, sizeof(resp));
 956         if (ret) {
 957                 uobj_alloc_abort(uobj);
 958                 return ret;
 959         }
 960
 961         return uobj_alloc_commit(uobj);
 962 }
 963
 964 static struct ib_ucq_object *create_cq(struct uverbs_attr_bundle *attrs,
 965                                        struct ib_uverbs_ex_create_cq *cmd)
 966 {
 967         struct ib_ucq_object           *obj;
 968         struct ib_uverbs_completion_event_file    *ev_file = NULL;
 969         struct ib_cq                   *cq;
 970         int                             ret;
 971         struct ib_uverbs_ex_create_cq_resp resp;
 972         struct ib_cq_init_attr attr = {};
 973         struct ib_device *ib_dev;
 974
 975         if (cmd->comp_vector >= attrs->ufile->device->num_comp_vectors)
 976                 return ERR_PTR(-EINVAL);
 977
 978         obj = (struct ib_ucq_object *)uobj_alloc(UVERBS_OBJECT_CQ, attrs,
 979                                                  &ib_dev);
 980         if (IS_ERR(obj))
 981                 return obj;
 982
 983         if (cmd->comp_channel >= 0) {
 984                 ev_file = ib_uverbs_lookup_comp_file(cmd->comp_channel, attrs);
 985                 if (IS_ERR(ev_file)) {
 986                         ret = PTR_ERR(ev_file);
 987                         goto err;
 988                 }
 989         }
 990
 991         obj->uobject.user_handle = cmd->user_handle;
 992         obj->comp_events_reported  = 0;
 993         obj->async_events_reported = 0;
 994         INIT_LIST_HEAD(&obj->comp_list);
 995         INIT_LIST_HEAD(&obj->async_list);
 996
 997         attr.cqe = cmd->cqe;
 998         attr.comp_vector = cmd->comp_vector;
 999         attr.flags = cmd->flags;
1000
1001         cq = ib_dev->ops.create_cq(ib_dev, &attr, obj->uobject.context,
1002                                    &attrs->driver_udata);
1003         if (IS_ERR(cq)) {
1004                 ret = PTR_ERR(cq);
1005                 goto err_file;
1006         }
1007
1008         cq->device        = ib_dev;
1009         cq->uobject       = &obj->uobject;
1010         cq->comp_handler  = ib_uverbs_comp_handler;
1011         cq->event_handler = ib_uverbs_cq_event_handler;
1012         cq->cq_context    = ev_file ? &ev_file->ev_queue : NULL;
1013         atomic_set(&cq->usecnt, 0);
1014
1015         obj->uobject.object = cq;
1016         memset(&resp, 0, sizeof resp);
1017         resp.base.cq_handle = obj->uobject.id;
1018         resp.base.cqe       = cq->cqe;
1019         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
1020
1021         cq->res.type = RDMA_RESTRACK_CQ;
1022         rdma_restrack_uadd(&cq->res);
1023
1024         ret = uverbs_response(attrs, &resp, sizeof(resp));
1025         if (ret)
1026                 goto err_cb;
1027
1028         ret = uobj_alloc_commit(&obj->uobject);
1029         if (ret)
1030                 return ERR_PTR(ret);
1031         return obj;
1032
1033 err_cb:
1034         ib_destroy_cq(cq);
1035
1036 err_file:
1037         if (ev_file)
1038                 ib_uverbs_release_ucq(attrs->ufile, ev_file, obj);
1039
1040 err:
1041         uobj_alloc_abort(&obj->uobject);
1042
1043         return ERR_PTR(ret);
1044 }
1045
1046 static int ib_uverbs_create_cq(struct uverbs_attr_bundle *attrs)
1047 {
1048         struct ib_uverbs_create_cq      cmd;
1049         struct ib_uverbs_ex_create_cq   cmd_ex;
1050         struct ib_ucq_object           *obj;
1051         int ret;
1052
1053         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1054         if (ret)
1055                 return ret;
1056
1057         memset(&cmd_ex, 0, sizeof(cmd_ex));
1058         cmd_ex.user_handle = cmd.user_handle;
1059         cmd_ex.cqe = cmd.cqe;
1060         cmd_ex.comp_vector = cmd.comp_vector;
1061         cmd_ex.comp_channel = cmd.comp_channel;
1062
1063         obj = create_cq(attrs, &cmd_ex);
1064         return PTR_ERR_OR_ZERO(obj);
1065 }
1066
1067 static int ib_uverbs_ex_create_cq(struct uverbs_attr_bundle *attrs)
1068 {
1069         struct ib_uverbs_ex_create_cq  cmd;
1070         struct ib_ucq_object           *obj;
1071         int ret;
1072
1073         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1074         if (ret)
1075                 return ret;
1076
1077         if (cmd.comp_mask)
1078                 return -EINVAL;
1079
1080         if (cmd.reserved)
1081                 return -EINVAL;
1082
1083         obj = create_cq(attrs, &cmd);
1084         return PTR_ERR_OR_ZERO(obj);
1085 }
1086
1087 static int ib_uverbs_resize_cq(struct uverbs_attr_bundle *attrs)
1088 {
1089         struct ib_uverbs_resize_cq      cmd;
1090         struct ib_uverbs_resize_cq_resp resp = {};
1091         struct ib_cq                    *cq;
1092         int                             ret = -EINVAL;
1093
1094         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1095         if (ret)
1096                 return ret;
1097
1098         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
1099         if (!cq)
1100                 return -EINVAL;
1101
1102         ret = cq->device->ops.resize_cq(cq, cmd.cqe, &attrs->driver_udata);
1103         if (ret)
1104                 goto out;
1105
1106         resp.cqe = cq->cqe;
1107
1108         ret = uverbs_response(attrs, &resp, sizeof(resp));
1109 out:
1110         uobj_put_obj_read(cq);
1111
1112         return ret;
1113 }
1114
1115 static int copy_wc_to_user(struct ib_device *ib_dev, void __user *dest,
1116                            struct ib_wc *wc)
1117 {
1118         struct ib_uverbs_wc tmp;
1119
1120         tmp.wr_id               = wc->wr_id;
1121         tmp.status              = wc->status;
1122         tmp.opcode              = wc->opcode;
1123         tmp.vendor_err          = wc->vendor_err;
1124         tmp.byte_len            = wc->byte_len;
1125         tmp.ex.imm_data         = wc->ex.imm_data;
1126         tmp.qp_num              = wc->qp->qp_num;
1127         tmp.src_qp              = wc->src_qp;
1128         tmp.wc_flags            = wc->wc_flags;
1129         tmp.pkey_index          = wc->pkey_index;
1130         if (rdma_cap_opa_ah(ib_dev, wc->port_num))
1131                 tmp.slid        = OPA_TO_IB_UCAST_LID(wc->slid);
1132         else
1133                 tmp.slid        = ib_lid_cpu16(wc->slid);
1134         tmp.sl                  = wc->sl;
1135         tmp.dlid_path_bits      = wc->dlid_path_bits;
1136         tmp.port_num            = wc->port_num;
1137         tmp.reserved            = 0;
1138
1139         if (copy_to_user(dest, &tmp, sizeof tmp))
1140                 return -EFAULT;
1141
1142         return 0;
1143 }
1144
1145 static int ib_uverbs_poll_cq(struct uverbs_attr_bundle *attrs)
1146 {
1147         struct ib_uverbs_poll_cq       cmd;
1148         struct ib_uverbs_poll_cq_resp  resp;
1149         u8 __user                     *header_ptr;
1150         u8 __user                     *data_ptr;
1151         struct ib_cq                  *cq;
1152         struct ib_wc                   wc;
1153         int                            ret;
1154
1155         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1156         if (ret)
1157                 return ret;
1158
1159         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
1160         if (!cq)
1161                 return -EINVAL;
1162
1163         /* we copy a struct ib_uverbs_poll_cq_resp to user space */
1164         header_ptr = attrs->ucore.outbuf;
1165         data_ptr = header_ptr + sizeof resp;
1166
1167         memset(&resp, 0, sizeof resp);
1168         while (resp.count < cmd.ne) {
1169                 ret = ib_poll_cq(cq, 1, &wc);
1170                 if (ret < 0)
1171                         goto out_put;
1172                 if (!ret)
1173                         break;
1174
1175                 ret = copy_wc_to_user(cq->device, data_ptr, &wc);
1176                 if (ret)
1177                         goto out_put;
1178
1179                 data_ptr += sizeof(struct ib_uverbs_wc);
1180                 ++resp.count;
1181         }
1182
1183         if (copy_to_user(header_ptr, &resp, sizeof resp)) {
1184                 ret = -EFAULT;
1185                 goto out_put;
1186         }
1187
1188         if (uverbs_attr_is_valid(attrs, UVERBS_ATTR_CORE_OUT))
1189                 ret = uverbs_output_written(attrs, UVERBS_ATTR_CORE_OUT);
1190
1191         ret = 0;
1192
1193 out_put:
1194         uobj_put_obj_read(cq);
1195         return ret;
1196 }
1197
1198 static int ib_uverbs_req_notify_cq(struct uverbs_attr_bundle *attrs)
1199 {
1200         struct ib_uverbs_req_notify_cq cmd;
1201         struct ib_cq                  *cq;
1202         int ret;
1203
1204         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1205         if (ret)
1206                 return ret;
1207
1208         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
1209         if (!cq)
1210                 return -EINVAL;
1211
1212         ib_req_notify_cq(cq, cmd.solicited_only ?
1213                          IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
1214
1215         uobj_put_obj_read(cq);
1216
1217         return 0;
1218 }
1219
1220 static int ib_uverbs_destroy_cq(struct uverbs_attr_bundle *attrs)
1221 {
1222         struct ib_uverbs_destroy_cq      cmd;
1223         struct ib_uverbs_destroy_cq_resp resp;
1224         struct ib_uobject               *uobj;
1225         struct ib_ucq_object            *obj;
1226         int ret;
1227
1228         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1229         if (ret)
1230                 return ret;
1231
1232         uobj = uobj_get_destroy(UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
1233         if (IS_ERR(uobj))
1234                 return PTR_ERR(uobj);
1235
1236         obj = container_of(uobj, struct ib_ucq_object, uobject);
1237         memset(&resp, 0, sizeof(resp));
1238         resp.comp_events_reported  = obj->comp_events_reported;
1239         resp.async_events_reported = obj->async_events_reported;
1240
1241         uobj_put_destroy(uobj);
1242
1243         return uverbs_response(attrs, &resp, sizeof(resp));
1244 }
1245
1246 static int create_qp(struct uverbs_attr_bundle *attrs,
1247                      struct ib_uverbs_ex_create_qp *cmd)
1248 {
1249         struct ib_uqp_object            *obj;
1250         struct ib_device                *device;
1251         struct ib_pd                    *pd = NULL;
1252         struct ib_xrcd                  *xrcd = NULL;
1253         struct ib_uobject               *xrcd_uobj = ERR_PTR(-ENOENT);
1254         struct ib_cq                    *scq = NULL, *rcq = NULL;
1255         struct ib_srq                   *srq = NULL;
1256         struct ib_qp                    *qp;
1257         struct ib_qp_init_attr          attr = {};
1258         struct ib_uverbs_ex_create_qp_resp resp;
1259         int                             ret;
1260         struct ib_rwq_ind_table *ind_tbl = NULL;
1261         bool has_sq = true;
1262         struct ib_device *ib_dev;
1263
1264         if (cmd->qp_type == IB_QPT_RAW_PACKET && !capable(CAP_NET_RAW))
1265                 return -EPERM;
1266
1267         obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs,
1268                                                  &ib_dev);
1269         if (IS_ERR(obj))
1270                 return PTR_ERR(obj);
1271         obj->uxrcd = NULL;
1272         obj->uevent.uobject.user_handle = cmd->user_handle;
1273         mutex_init(&obj->mcast_lock);
1274
1275         if (cmd->comp_mask & IB_UVERBS_CREATE_QP_MASK_IND_TABLE) {
1276                 ind_tbl = uobj_get_obj_read(rwq_ind_table,
1277                                             UVERBS_OBJECT_RWQ_IND_TBL,
1278                                             cmd->rwq_ind_tbl_handle, attrs);
1279                 if (!ind_tbl) {
1280                         ret = -EINVAL;
1281                         goto err_put;
1282                 }
1283
1284                 attr.rwq_ind_tbl = ind_tbl;
1285         }
1286
1287         if (ind_tbl && (cmd->max_recv_wr || cmd->max_recv_sge || cmd->is_srq)) {
1288                 ret = -EINVAL;
1289                 goto err_put;
1290         }
1291
1292         if (ind_tbl && !cmd->max_send_wr)
1293                 has_sq = false;
1294
1295         if (cmd->qp_type == IB_QPT_XRC_TGT) {
1296                 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->pd_handle,
1297                                           attrs);
1298
1299                 if (IS_ERR(xrcd_uobj)) {
1300                         ret = -EINVAL;
1301                         goto err_put;
1302                 }
1303
1304                 xrcd = (struct ib_xrcd *)xrcd_uobj->object;
1305                 if (!xrcd) {
1306                         ret = -EINVAL;
1307                         goto err_put;
1308                 }
1309                 device = xrcd->device;
1310         } else {
1311                 if (cmd->qp_type == IB_QPT_XRC_INI) {
1312                         cmd->max_recv_wr = 0;
1313                         cmd->max_recv_sge = 0;
1314                 } else {
1315                         if (cmd->is_srq) {
1316                                 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ,
1317                                                         cmd->srq_handle, attrs);
1318                                 if (!srq || srq->srq_type == IB_SRQT_XRC) {
1319                                         ret = -EINVAL;
1320                                         goto err_put;
1321                                 }
1322                         }
1323
1324                         if (!ind_tbl) {
1325                                 if (cmd->recv_cq_handle != cmd->send_cq_handle) {
1326                                         rcq = uobj_get_obj_read(
1327                                                 cq, UVERBS_OBJECT_CQ,
1328                                                 cmd->recv_cq_handle, attrs);
1329                                         if (!rcq) {
1330                                                 ret = -EINVAL;
1331                                                 goto err_put;
1332                                         }
1333                                 }
1334                         }
1335                 }
1336
1337                 if (has_sq)
1338                         scq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ,
1339                                                 cmd->send_cq_handle, attrs);
1340                 if (!ind_tbl)
1341                         rcq = rcq ?: scq;
1342                 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle,
1343                                        attrs);
1344                 if (!pd || (!scq && has_sq)) {
1345                         ret = -EINVAL;
1346                         goto err_put;
1347                 }
1348
1349                 device = pd->device;
1350         }
1351
1352         attr.event_handler = ib_uverbs_qp_event_handler;
1353         attr.qp_context    = attrs->ufile;
1354         attr.send_cq       = scq;
1355         attr.recv_cq       = rcq;
1356         attr.srq           = srq;
1357         attr.xrcd          = xrcd;
1358         attr.sq_sig_type   = cmd->sq_sig_all ? IB_SIGNAL_ALL_WR :
1359                                               IB_SIGNAL_REQ_WR;
1360         attr.qp_type       = cmd->qp_type;
1361         attr.create_flags  = 0;
1362
1363         attr.cap.max_send_wr     = cmd->max_send_wr;
1364         attr.cap.max_recv_wr     = cmd->max_recv_wr;
1365         attr.cap.max_send_sge    = cmd->max_send_sge;
1366         attr.cap.max_recv_sge    = cmd->max_recv_sge;
1367         attr.cap.max_inline_data = cmd->max_inline_data;
1368
1369         obj->uevent.events_reported     = 0;
1370         INIT_LIST_HEAD(&obj->uevent.event_list);
1371         INIT_LIST_HEAD(&obj->mcast_list);
1372
1373         attr.create_flags = cmd->create_flags;
1374         if (attr.create_flags & ~(IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK |
1375                                 IB_QP_CREATE_CROSS_CHANNEL |
1376                                 IB_QP_CREATE_MANAGED_SEND |
1377                                 IB_QP_CREATE_MANAGED_RECV |
1378                                 IB_QP_CREATE_SCATTER_FCS |
1379                                 IB_QP_CREATE_CVLAN_STRIPPING |
1380                                 IB_QP_CREATE_SOURCE_QPN |
1381                                 IB_QP_CREATE_PCI_WRITE_END_PADDING)) {
1382                 ret = -EINVAL;
1383                 goto err_put;
1384         }
1385
1386         if (attr.create_flags & IB_QP_CREATE_SOURCE_QPN) {
1387                 if (!capable(CAP_NET_RAW)) {
1388                         ret = -EPERM;
1389                         goto err_put;
1390                 }
1391
1392                 attr.source_qpn = cmd->source_qpn;
1393         }
1394
1395         if (cmd->qp_type == IB_QPT_XRC_TGT)
1396                 qp = ib_create_qp(pd, &attr);
1397         else
1398                 qp = _ib_create_qp(device, pd, &attr, &attrs->driver_udata,
1399                                    &obj->uevent.uobject);
1400
1401         if (IS_ERR(qp)) {
1402                 ret = PTR_ERR(qp);
1403                 goto err_put;
1404         }
1405
1406         if (cmd->qp_type != IB_QPT_XRC_TGT) {
1407                 ret = ib_create_qp_security(qp, device);
1408                 if (ret)
1409                         goto err_cb;
1410
1411                 qp->real_qp       = qp;
1412                 qp->pd            = pd;
1413                 qp->send_cq       = attr.send_cq;
1414                 qp->recv_cq       = attr.recv_cq;
1415                 qp->srq           = attr.srq;
1416                 qp->rwq_ind_tbl   = ind_tbl;
1417                 qp->event_handler = attr.event_handler;
1418                 qp->qp_context    = attr.qp_context;
1419                 qp->qp_type       = attr.qp_type;
1420                 atomic_set(&qp->usecnt, 0);
1421                 atomic_inc(&pd->usecnt);
1422                 qp->port = 0;
1423                 if (attr.send_cq)
1424                         atomic_inc(&attr.send_cq->usecnt);
1425                 if (attr.recv_cq)
1426                         atomic_inc(&attr.recv_cq->usecnt);
1427                 if (attr.srq)
1428                         atomic_inc(&attr.srq->usecnt);
1429                 if (ind_tbl)
1430                         atomic_inc(&ind_tbl->usecnt);
1431         } else {
1432                 /* It is done in _ib_create_qp for other QP types */
1433                 qp->uobject = &obj->uevent.uobject;
1434         }
1435
1436         obj->uevent.uobject.object = qp;
1437
1438         memset(&resp, 0, sizeof resp);
1439         resp.base.qpn             = qp->qp_num;
1440         resp.base.qp_handle       = obj->uevent.uobject.id;
1441         resp.base.max_recv_sge    = attr.cap.max_recv_sge;
1442         resp.base.max_send_sge    = attr.cap.max_send_sge;
1443         resp.base.max_recv_wr     = attr.cap.max_recv_wr;
1444         resp.base.max_send_wr     = attr.cap.max_send_wr;
1445         resp.base.max_inline_data = attr.cap.max_inline_data;
1446         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
1447
1448         ret = uverbs_response(attrs, &resp, sizeof(resp));
1449         if (ret)
1450                 goto err_cb;
1451
1452         if (xrcd) {
1453                 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object,
1454                                           uobject);
1455                 atomic_inc(&obj->uxrcd->refcnt);
1456                 uobj_put_read(xrcd_uobj);
1457         }
1458
1459         if (pd)
1460                 uobj_put_obj_read(pd);
1461         if (scq)
1462                 uobj_put_obj_read(scq);
1463         if (rcq && rcq != scq)
1464                 uobj_put_obj_read(rcq);
1465         if (srq)
1466                 uobj_put_obj_read(srq);
1467         if (ind_tbl)
1468                 uobj_put_obj_read(ind_tbl);
1469
1470         return uobj_alloc_commit(&obj->uevent.uobject);
1471 err_cb:
1472         ib_destroy_qp(qp);
1473
1474 err_put:
1475         if (!IS_ERR(xrcd_uobj))
1476                 uobj_put_read(xrcd_uobj);
1477         if (pd)
1478                 uobj_put_obj_read(pd);
1479         if (scq)
1480                 uobj_put_obj_read(scq);
1481         if (rcq && rcq != scq)
1482                 uobj_put_obj_read(rcq);
1483         if (srq)
1484                 uobj_put_obj_read(srq);
1485         if (ind_tbl)
1486                 uobj_put_obj_read(ind_tbl);
1487
1488         uobj_alloc_abort(&obj->uevent.uobject);
1489         return ret;
1490 }
1491
1492 static int ib_uverbs_create_qp(struct uverbs_attr_bundle *attrs)
1493 {
1494         struct ib_uverbs_create_qp      cmd;
1495         struct ib_uverbs_ex_create_qp   cmd_ex;
1496         int ret;
1497
1498         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1499         if (ret)
1500                 return ret;
1501
1502         memset(&cmd_ex, 0, sizeof(cmd_ex));
1503         cmd_ex.user_handle = cmd.user_handle;
1504         cmd_ex.pd_handle = cmd.pd_handle;
1505         cmd_ex.send_cq_handle = cmd.send_cq_handle;
1506         cmd_ex.recv_cq_handle = cmd.recv_cq_handle;
1507         cmd_ex.srq_handle = cmd.srq_handle;
1508         cmd_ex.max_send_wr = cmd.max_send_wr;
1509         cmd_ex.max_recv_wr = cmd.max_recv_wr;
1510         cmd_ex.max_send_sge = cmd.max_send_sge;
1511         cmd_ex.max_recv_sge = cmd.max_recv_sge;
1512         cmd_ex.max_inline_data = cmd.max_inline_data;
1513         cmd_ex.sq_sig_all = cmd.sq_sig_all;
1514         cmd_ex.qp_type = cmd.qp_type;
1515         cmd_ex.is_srq = cmd.is_srq;
1516
1517         return create_qp(attrs, &cmd_ex);
1518 }
1519
1520 static int ib_uverbs_ex_create_qp(struct uverbs_attr_bundle *attrs)
1521 {
1522         struct ib_uverbs_ex_create_qp cmd;
1523         int ret;
1524
1525         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1526         if (ret)
1527                 return ret;
1528
1529         if (cmd.comp_mask & ~IB_UVERBS_CREATE_QP_SUP_COMP_MASK)
1530                 return -EINVAL;
1531
1532         if (cmd.reserved)
1533                 return -EINVAL;
1534
1535         return create_qp(attrs, &cmd);
1536 }
1537
1538 static int ib_uverbs_open_qp(struct uverbs_attr_bundle *attrs)
1539 {
1540         struct ib_uverbs_open_qp        cmd;
1541         struct ib_uverbs_create_qp_resp resp;
1542         struct ib_uqp_object           *obj;
1543         struct ib_xrcd                 *xrcd;
1544         struct ib_uobject              *uninitialized_var(xrcd_uobj);
1545         struct ib_qp                   *qp;
1546         struct ib_qp_open_attr          attr;
1547         int ret;
1548         struct ib_device *ib_dev;
1549
1550         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1551         if (ret)
1552                 return ret;
1553
1554         obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs,
1555                                                  &ib_dev);
1556         if (IS_ERR(obj))
1557                 return PTR_ERR(obj);
1558
1559         xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd.pd_handle, attrs);
1560         if (IS_ERR(xrcd_uobj)) {
1561                 ret = -EINVAL;
1562                 goto err_put;
1563         }
1564
1565         xrcd = (struct ib_xrcd *)xrcd_uobj->object;
1566         if (!xrcd) {
1567                 ret = -EINVAL;
1568                 goto err_xrcd;
1569         }
1570
1571         attr.event_handler = ib_uverbs_qp_event_handler;
1572         attr.qp_context    = attrs->ufile;
1573         attr.qp_num        = cmd.qpn;
1574         attr.qp_type       = cmd.qp_type;
1575
1576         obj->uevent.events_reported = 0;
1577         INIT_LIST_HEAD(&obj->uevent.event_list);
1578         INIT_LIST_HEAD(&obj->mcast_list);
1579
1580         qp = ib_open_qp(xrcd, &attr);
1581         if (IS_ERR(qp)) {
1582                 ret = PTR_ERR(qp);
1583                 goto err_xrcd;
1584         }
1585
1586         obj->uevent.uobject.object = qp;
1587         obj->uevent.uobject.user_handle = cmd.user_handle;
1588
1589         memset(&resp, 0, sizeof resp);
1590         resp.qpn       = qp->qp_num;
1591         resp.qp_handle = obj->uevent.uobject.id;
1592
1593         ret = uverbs_response(attrs, &resp, sizeof(resp));
1594         if (ret)
1595                 goto err_destroy;
1596
1597         obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
1598         atomic_inc(&obj->uxrcd->refcnt);
1599         qp->uobject = &obj->uevent.uobject;
1600         uobj_put_read(xrcd_uobj);
1601
1602         return uobj_alloc_commit(&obj->uevent.uobject);
1603
1604 err_destroy:
1605         ib_destroy_qp(qp);
1606 err_xrcd:
1607         uobj_put_read(xrcd_uobj);
1608 err_put:
1609         uobj_alloc_abort(&obj->uevent.uobject);
1610         return ret;
1611 }
1612
1613 static void copy_ah_attr_to_uverbs(struct ib_uverbs_qp_dest *uverb_attr,
1614                                    struct rdma_ah_attr *rdma_attr)
1615 {
1616         const struct ib_global_route   *grh;
1617
1618         uverb_attr->dlid              = rdma_ah_get_dlid(rdma_attr);
1619         uverb_attr->sl                = rdma_ah_get_sl(rdma_attr);
1620         uverb_attr->src_path_bits     = rdma_ah_get_path_bits(rdma_attr);
1621         uverb_attr->static_rate       = rdma_ah_get_static_rate(rdma_attr);
1622         uverb_attr->is_global         = !!(rdma_ah_get_ah_flags(rdma_attr) &
1623                                          IB_AH_GRH);
1624         if (uverb_attr->is_global) {
1625                 grh = rdma_ah_read_grh(rdma_attr);
1626                 memcpy(uverb_attr->dgid, grh->dgid.raw, 16);
1627                 uverb_attr->flow_label        = grh->flow_label;
1628                 uverb_attr->sgid_index        = grh->sgid_index;
1629                 uverb_attr->hop_limit         = grh->hop_limit;
1630                 uverb_attr->traffic_class     = grh->traffic_class;
1631         }
1632         uverb_attr->port_num          = rdma_ah_get_port_num(rdma_attr);
1633 }
1634
1635 static int ib_uverbs_query_qp(struct uverbs_attr_bundle *attrs)
1636 {
1637         struct ib_uverbs_query_qp      cmd;
1638         struct ib_uverbs_query_qp_resp resp;
1639         struct ib_qp                   *qp;
1640         struct ib_qp_attr              *attr;
1641         struct ib_qp_init_attr         *init_attr;
1642         int                            ret;
1643
1644         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1645         if (ret)
1646                 return ret;
1647
1648         attr      = kmalloc(sizeof *attr, GFP_KERNEL);
1649         init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1650         if (!attr || !init_attr) {
1651                 ret = -ENOMEM;
1652                 goto out;
1653         }
1654
1655         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
1656         if (!qp) {
1657                 ret = -EINVAL;
1658                 goto out;
1659         }
1660
1661         ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1662
1663         uobj_put_obj_read(qp);
1664
1665         if (ret)
1666                 goto out;
1667
1668         memset(&resp, 0, sizeof resp);
1669
1670         resp.qp_state               = attr->qp_state;
1671         resp.cur_qp_state           = attr->cur_qp_state;
1672         resp.path_mtu               = attr->path_mtu;
1673         resp.path_mig_state         = attr->path_mig_state;
1674         resp.qkey                   = attr->qkey;
1675         resp.rq_psn                 = attr->rq_psn;
1676         resp.sq_psn                 = attr->sq_psn;
1677         resp.dest_qp_num            = attr->dest_qp_num;
1678         resp.qp_access_flags        = attr->qp_access_flags;
1679         resp.pkey_index             = attr->pkey_index;
1680         resp.alt_pkey_index         = attr->alt_pkey_index;
1681         resp.sq_draining            = attr->sq_draining;
1682         resp.max_rd_atomic          = attr->max_rd_atomic;
1683         resp.max_dest_rd_atomic     = attr->max_dest_rd_atomic;
1684         resp.min_rnr_timer          = attr->min_rnr_timer;
1685         resp.port_num               = attr->port_num;
1686         resp.timeout                = attr->timeout;
1687         resp.retry_cnt              = attr->retry_cnt;
1688         resp.rnr_retry              = attr->rnr_retry;
1689         resp.alt_port_num           = attr->alt_port_num;
1690         resp.alt_timeout            = attr->alt_timeout;
1691
1692         copy_ah_attr_to_uverbs(&resp.dest, &attr->ah_attr);
1693         copy_ah_attr_to_uverbs(&resp.alt_dest, &attr->alt_ah_attr);
1694
1695         resp.max_send_wr            = init_attr->cap.max_send_wr;
1696         resp.max_recv_wr            = init_attr->cap.max_recv_wr;
1697         resp.max_send_sge           = init_attr->cap.max_send_sge;
1698         resp.max_recv_sge           = init_attr->cap.max_recv_sge;
1699         resp.max_inline_data        = init_attr->cap.max_inline_data;
1700         resp.sq_sig_all             = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1701
1702         ret = uverbs_response(attrs, &resp, sizeof(resp));
1703
1704 out:
1705         kfree(attr);
1706         kfree(init_attr);
1707
1708         return ret;
1709 }
1710
1711 /* Remove ignored fields set in the attribute mask */
1712 static int modify_qp_mask(enum ib_qp_type qp_type, int mask)
1713 {
1714         switch (qp_type) {
1715         case IB_QPT_XRC_INI:
1716                 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER);
1717         case IB_QPT_XRC_TGT:
1718                 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT |
1719                                 IB_QP_RNR_RETRY);
1720         default:
1721                 return mask;
1722         }
1723 }
1724
1725 static void copy_ah_attr_from_uverbs(struct ib_device *dev,
1726                                      struct rdma_ah_attr *rdma_attr,
1727                                      struct ib_uverbs_qp_dest *uverb_attr)
1728 {
1729         rdma_attr->type = rdma_ah_find_type(dev, uverb_attr->port_num);
1730         if (uverb_attr->is_global) {
1731                 rdma_ah_set_grh(rdma_attr, NULL,
1732                                 uverb_attr->flow_label,
1733                                 uverb_attr->sgid_index,
1734                                 uverb_attr->hop_limit,
1735                                 uverb_attr->traffic_class);
1736                 rdma_ah_set_dgid_raw(rdma_attr, uverb_attr->dgid);
1737         } else {
1738                 rdma_ah_set_ah_flags(rdma_attr, 0);
1739         }
1740         rdma_ah_set_dlid(rdma_attr, uverb_attr->dlid);
1741         rdma_ah_set_sl(rdma_attr, uverb_attr->sl);
1742         rdma_ah_set_path_bits(rdma_attr, uverb_attr->src_path_bits);
1743         rdma_ah_set_static_rate(rdma_attr, uverb_attr->static_rate);
1744         rdma_ah_set_port_num(rdma_attr, uverb_attr->port_num);
1745         rdma_ah_set_make_grd(rdma_attr, false);
1746 }
1747
1748 static int modify_qp(struct uverbs_attr_bundle *attrs,
1749                      struct ib_uverbs_ex_modify_qp *cmd)
1750 {
1751         struct ib_qp_attr *attr;
1752         struct ib_qp *qp;
1753         int ret;
1754
1755         attr = kzalloc(sizeof(*attr), GFP_KERNEL);
1756         if (!attr)
1757                 return -ENOMEM;
1758
1759         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd->base.qp_handle,
1760                                attrs);
1761         if (!qp) {
1762                 ret = -EINVAL;
1763                 goto out;
1764         }
1765
1766         if ((cmd->base.attr_mask & IB_QP_PORT) &&
1767             !rdma_is_port_valid(qp->device, cmd->base.port_num)) {
1768                 ret = -EINVAL;
1769                 goto release_qp;
1770         }
1771
1772         if ((cmd->base.attr_mask & IB_QP_AV)) {
1773                 if (!rdma_is_port_valid(qp->device, cmd->base.dest.port_num)) {
1774                         ret = -EINVAL;
1775                         goto release_qp;
1776                 }
1777
1778                 if (cmd->base.attr_mask & IB_QP_STATE &&
1779                     cmd->base.qp_state == IB_QPS_RTR) {
1780                 /* We are in INIT->RTR TRANSITION (if we are not,
1781                  * this transition will be rejected in subsequent checks).
1782                  * In the INIT->RTR transition, we cannot have IB_QP_PORT set,
1783                  * but the IB_QP_STATE flag is required.
1784                  *
1785                  * Since kernel 3.14 (commit dbf727de7440), the uverbs driver,
1786                  * when IB_QP_AV is set, has required inclusion of a valid
1787                  * port number in the primary AV. (AVs are created and handled
1788                  * differently for infiniband and ethernet (RoCE) ports).
1789                  *
1790                  * Check the port number included in the primary AV against
1791                  * the port number in the qp struct, which was set (and saved)
1792                  * in the RST->INIT transition.
1793                  */
1794                         if (cmd->base.dest.port_num != qp->real_qp->port) {
1795                                 ret = -EINVAL;
1796                                 goto release_qp;
1797                         }
1798                 } else {
1799                 /* We are in SQD->SQD. (If we are not, this transition will
1800                  * be rejected later in the verbs layer checks).
1801                  * Check for both IB_QP_PORT and IB_QP_AV, these can be set
1802                  * together in the SQD->SQD transition.
1803                  *
1804                  * If only IP_QP_AV was set, add in IB_QP_PORT as well (the
1805                  * verbs layer driver does not track primary port changes
1806                  * resulting from path migration. Thus, in SQD, if the primary
1807                  * AV is modified, the primary port should also be modified).
1808                  *
1809                  * Note that in this transition, the IB_QP_STATE flag
1810                  * is not allowed.
1811                  */
1812                         if (((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT))
1813                              == (IB_QP_AV | IB_QP_PORT)) &&
1814                             cmd->base.port_num != cmd->base.dest.port_num) {
1815                                 ret = -EINVAL;
1816                                 goto release_qp;
1817                         }
1818                         if ((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT))
1819                             == IB_QP_AV) {
1820                                 cmd->base.attr_mask |= IB_QP_PORT;
1821                                 cmd->base.port_num = cmd->base.dest.port_num;
1822                         }
1823                 }
1824         }
1825
1826         if ((cmd->base.attr_mask & IB_QP_ALT_PATH) &&
1827             (!rdma_is_port_valid(qp->device, cmd->base.alt_port_num) ||
1828             !rdma_is_port_valid(qp->device, cmd->base.alt_dest.port_num) ||
1829             cmd->base.alt_port_num != cmd->base.alt_dest.port_num)) {
1830                 ret = -EINVAL;
1831                 goto release_qp;
1832         }
1833
1834         if ((cmd->base.attr_mask & IB_QP_CUR_STATE &&
1835             cmd->base.cur_qp_state > IB_QPS_ERR) ||
1836             (cmd->base.attr_mask & IB_QP_STATE &&
1837             cmd->base.qp_state > IB_QPS_ERR)) {
1838                 ret = -EINVAL;
1839                 goto release_qp;
1840         }
1841
1842         if (cmd->base.attr_mask & IB_QP_STATE)
1843                 attr->qp_state = cmd->base.qp_state;
1844         if (cmd->base.attr_mask & IB_QP_CUR_STATE)
1845                 attr->cur_qp_state = cmd->base.cur_qp_state;
1846         if (cmd->base.attr_mask & IB_QP_PATH_MTU)
1847                 attr->path_mtu = cmd->base.path_mtu;
1848         if (cmd->base.attr_mask & IB_QP_PATH_MIG_STATE)
1849                 attr->path_mig_state = cmd->base.path_mig_state;
1850         if (cmd->base.attr_mask & IB_QP_QKEY)
1851                 attr->qkey = cmd->base.qkey;
1852         if (cmd->base.attr_mask & IB_QP_RQ_PSN)
1853                 attr->rq_psn = cmd->base.rq_psn;
1854         if (cmd->base.attr_mask & IB_QP_SQ_PSN)
1855                 attr->sq_psn = cmd->base.sq_psn;
1856         if (cmd->base.attr_mask & IB_QP_DEST_QPN)
1857                 attr->dest_qp_num = cmd->base.dest_qp_num;
1858         if (cmd->base.attr_mask & IB_QP_ACCESS_FLAGS)
1859                 attr->qp_access_flags = cmd->base.qp_access_flags;
1860         if (cmd->base.attr_mask & IB_QP_PKEY_INDEX)
1861                 attr->pkey_index = cmd->base.pkey_index;
1862         if (cmd->base.attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY)
1863                 attr->en_sqd_async_notify = cmd->base.en_sqd_async_notify;
1864         if (cmd->base.attr_mask & IB_QP_MAX_QP_RD_ATOMIC)
1865                 attr->max_rd_atomic = cmd->base.max_rd_atomic;
1866         if (cmd->base.attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
1867                 attr->max_dest_rd_atomic = cmd->base.max_dest_rd_atomic;
1868         if (cmd->base.attr_mask & IB_QP_MIN_RNR_TIMER)
1869                 attr->min_rnr_timer = cmd->base.min_rnr_timer;
1870         if (cmd->base.attr_mask & IB_QP_PORT)
1871                 attr->port_num = cmd->base.port_num;
1872         if (cmd->base.attr_mask & IB_QP_TIMEOUT)
1873                 attr->timeout = cmd->base.timeout;
1874         if (cmd->base.attr_mask & IB_QP_RETRY_CNT)
1875                 attr->retry_cnt = cmd->base.retry_cnt;
1876         if (cmd->base.attr_mask & IB_QP_RNR_RETRY)
1877                 attr->rnr_retry = cmd->base.rnr_retry;
1878         if (cmd->base.attr_mask & IB_QP_ALT_PATH) {
1879                 attr->alt_port_num = cmd->base.alt_port_num;
1880                 attr->alt_timeout = cmd->base.alt_timeout;
1881                 attr->alt_pkey_index = cmd->base.alt_pkey_index;
1882         }
1883         if (cmd->base.attr_mask & IB_QP_RATE_LIMIT)
1884                 attr->rate_limit = cmd->rate_limit;
1885
1886         if (cmd->base.attr_mask & IB_QP_AV)
1887                 copy_ah_attr_from_uverbs(qp->device, &attr->ah_attr,
1888                                          &cmd->base.dest);
1889
1890         if (cmd->base.attr_mask & IB_QP_ALT_PATH)
1891                 copy_ah_attr_from_uverbs(qp->device, &attr->alt_ah_attr,
1892                                          &cmd->base.alt_dest);
1893
1894         ret = ib_modify_qp_with_udata(qp, attr,
1895                                       modify_qp_mask(qp->qp_type,
1896                                                      cmd->base.attr_mask),
1897                                       &attrs->driver_udata);
1898
1899 release_qp:
1900         uobj_put_obj_read(qp);
1901 out:
1902         kfree(attr);
1903
1904         return ret;
1905 }
1906
1907 static int ib_uverbs_modify_qp(struct uverbs_attr_bundle *attrs)
1908 {
1909         struct ib_uverbs_ex_modify_qp cmd;
1910         int ret;
1911
1912         ret = uverbs_request(attrs, &cmd.base, sizeof(cmd.base));
1913         if (ret)
1914                 return ret;
1915
1916         if (cmd.base.attr_mask &
1917             ~((IB_USER_LEGACY_LAST_QP_ATTR_MASK << 1) - 1))
1918                 return -EOPNOTSUPP;
1919
1920         return modify_qp(attrs, &cmd);
1921 }
1922
1923 static int ib_uverbs_ex_modify_qp(struct uverbs_attr_bundle *attrs)
1924 {
1925         struct ib_uverbs_ex_modify_qp cmd;
1926         struct ib_uverbs_ex_modify_qp_resp resp = {
1927                 .response_length = uverbs_response_length(attrs, sizeof(resp))
1928         };
1929         int ret;
1930
1931         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1932         if (ret)
1933                 return ret;
1934
1935         /*
1936          * Last bit is reserved for extending the attr_mask by
1937          * using another field.
1938          */
1939         BUILD_BUG_ON(IB_USER_LAST_QP_ATTR_MASK == (1 << 31));
1940
1941         if (cmd.base.attr_mask &
1942             ~((IB_USER_LAST_QP_ATTR_MASK << 1) - 1))
1943                 return -EOPNOTSUPP;
1944
1945         ret = modify_qp(attrs, &cmd);
1946         if (ret)
1947                 return ret;
1948
1949         return uverbs_response(attrs, &resp, sizeof(resp));
1950 }
1951
1952 static int ib_uverbs_destroy_qp(struct uverbs_attr_bundle *attrs)
1953 {
1954         struct ib_uverbs_destroy_qp      cmd;
1955         struct ib_uverbs_destroy_qp_resp resp;
1956         struct ib_uobject               *uobj;
1957         struct ib_uqp_object            *obj;
1958         int ret;
1959
1960         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1961         if (ret)
1962                 return ret;
1963
1964         uobj = uobj_get_destroy(UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
1965         if (IS_ERR(uobj))
1966                 return PTR_ERR(uobj);
1967
1968         obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
1969         memset(&resp, 0, sizeof(resp));
1970         resp.events_reported = obj->uevent.events_reported;
1971
1972         uobj_put_destroy(uobj);
1973
1974         return uverbs_response(attrs, &resp, sizeof(resp));
1975 }
1976
1977 static void *alloc_wr(size_t wr_size, __u32 num_sge)
1978 {
1979         if (num_sge >= (U32_MAX - ALIGN(wr_size, sizeof (struct ib_sge))) /
1980                        sizeof (struct ib_sge))
1981                 return NULL;
1982
1983         return kmalloc(ALIGN(wr_size, sizeof (struct ib_sge)) +
1984                          num_sge * sizeof (struct ib_sge), GFP_KERNEL);
1985 }
1986
1987 static int ib_uverbs_post_send(struct uverbs_attr_bundle *attrs)
1988 {
1989         struct ib_uverbs_post_send      cmd;
1990         struct ib_uverbs_post_send_resp resp;
1991         struct ib_uverbs_send_wr       *user_wr;
1992         struct ib_send_wr              *wr = NULL, *last, *next;
1993         const struct ib_send_wr        *bad_wr;
1994         struct ib_qp                   *qp;
1995         int                             i, sg_ind;
1996         int                             is_ud;
1997         int ret, ret2;
1998         size_t                          next_size;
1999         const struct ib_sge __user *sgls;
2000         const void __user *wqes;
2001         struct uverbs_req_iter iter;
2002
2003         ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
2004         if (ret)
2005                 return ret;
2006         wqes = uverbs_request_next_ptr(&iter, cmd.wqe_size * cmd.wr_count);
2007         if (IS_ERR(wqes))
2008                 return PTR_ERR(wqes);
2009         sgls = uverbs_request_next_ptr(
2010                 &iter, cmd.sge_count * sizeof(struct ib_uverbs_sge));
2011         if (IS_ERR(sgls))
2012                 return PTR_ERR(sgls);
2013         ret = uverbs_request_finish(&iter);
2014         if (ret)
2015                 return ret;
2016
2017         user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
2018         if (!user_wr)
2019                 return -ENOMEM;
2020
2021         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2022         if (!qp) {
2023                 ret = -EINVAL;
2024                 goto out;
2025         }
2026
2027         is_ud = qp->qp_type == IB_QPT_UD;
2028         sg_ind = 0;
2029         last = NULL;
2030         for (i = 0; i < cmd.wr_count; ++i) {
2031                 if (copy_from_user(user_wr, wqes + i * cmd.wqe_size,
2032                                    cmd.wqe_size)) {
2033                         ret = -EFAULT;
2034                         goto out_put;
2035                 }
2036
2037                 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
2038                         ret = -EINVAL;
2039                         goto out_put;
2040                 }
2041
2042                 if (is_ud) {
2043                         struct ib_ud_wr *ud;
2044
2045                         if (user_wr->opcode != IB_WR_SEND &&
2046                             user_wr->opcode != IB_WR_SEND_WITH_IMM) {
2047                                 ret = -EINVAL;
2048                                 goto out_put;
2049                         }
2050
2051                         next_size = sizeof(*ud);
2052                         ud = alloc_wr(next_size, user_wr->num_sge);
2053                         if (!ud) {
2054                                 ret = -ENOMEM;
2055                                 goto out_put;
2056                         }
2057
2058                         ud->ah = uobj_get_obj_read(ah, UVERBS_OBJECT_AH,
2059                                                    user_wr->wr.ud.ah, attrs);
2060                         if (!ud->ah) {
2061                                 kfree(ud);
2062                                 ret = -EINVAL;
2063                                 goto out_put;
2064                         }
2065                         ud->remote_qpn = user_wr->wr.ud.remote_qpn;
2066                         ud->remote_qkey = user_wr->wr.ud.remote_qkey;
2067
2068                         next = &ud->wr;
2069                 } else if (user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM ||
2070                            user_wr->opcode == IB_WR_RDMA_WRITE ||
2071                            user_wr->opcode == IB_WR_RDMA_READ) {
2072                         struct ib_rdma_wr *rdma;
2073
2074                         next_size = sizeof(*rdma);
2075                         rdma = alloc_wr(next_size, user_wr->num_sge);
2076                         if (!rdma) {
2077                                 ret = -ENOMEM;
2078                                 goto out_put;
2079                         }
2080
2081                         rdma->remote_addr = user_wr->wr.rdma.remote_addr;
2082                         rdma->rkey = user_wr->wr.rdma.rkey;
2083
2084                         next = &rdma->wr;
2085                 } else if (user_wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP ||
2086                            user_wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) {
2087                         struct ib_atomic_wr *atomic;
2088
2089                         next_size = sizeof(*atomic);
2090                         atomic = alloc_wr(next_size, user_wr->num_sge);
2091                         if (!atomic) {
2092                                 ret = -ENOMEM;
2093                                 goto out_put;
2094                         }
2095
2096                         atomic->remote_addr = user_wr->wr.atomic.remote_addr;
2097                         atomic->compare_add = user_wr->wr.atomic.compare_add;
2098                         atomic->swap = user_wr->wr.atomic.swap;
2099                         atomic->rkey = user_wr->wr.atomic.rkey;
2100
2101                         next = &atomic->wr;
2102                 } else if (user_wr->opcode == IB_WR_SEND ||
2103                            user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2104                            user_wr->opcode == IB_WR_SEND_WITH_INV) {
2105                         next_size = sizeof(*next);
2106                         next = alloc_wr(next_size, user_wr->num_sge);
2107                         if (!next) {
2108                                 ret = -ENOMEM;
2109                                 goto out_put;
2110                         }
2111                 } else {
2112                         ret = -EINVAL;
2113                         goto out_put;
2114                 }
2115
2116                 if (user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2117                     user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) {
2118                         next->ex.imm_data =
2119                                         (__be32 __force) user_wr->ex.imm_data;
2120                 } else if (user_wr->opcode == IB_WR_SEND_WITH_INV) {
2121                         next->ex.invalidate_rkey = user_wr->ex.invalidate_rkey;
2122                 }
2123
2124                 if (!last)
2125                         wr = next;
2126                 else
2127                         last->next = next;
2128                 last = next;
2129
2130                 next->next       = NULL;
2131                 next->wr_id      = user_wr->wr_id;
2132                 next->num_sge    = user_wr->num_sge;
2133                 next->opcode     = user_wr->opcode;
2134                 next->send_flags = user_wr->send_flags;
2135
2136                 if (next->num_sge) {
2137                         next->sg_list = (void *) next +
2138                                 ALIGN(next_size, sizeof(struct ib_sge));
2139                         if (copy_from_user(next->sg_list, sgls + sg_ind,
2140                                            next->num_sge *
2141                                                    sizeof(struct ib_sge))) {
2142                                 ret = -EFAULT;
2143                                 goto out_put;
2144                         }
2145                         sg_ind += next->num_sge;
2146                 } else
2147                         next->sg_list = NULL;
2148         }
2149
2150         resp.bad_wr = 0;
2151         ret = qp->device->ops.post_send(qp->real_qp, wr, &bad_wr);
2152         if (ret)
2153                 for (next = wr; next; next = next->next) {
2154                         ++resp.bad_wr;
2155                         if (next == bad_wr)
2156                                 break;
2157                 }
2158
2159         ret2 = uverbs_response(attrs, &resp, sizeof(resp));
2160         if (ret2)
2161                 ret = ret2;
2162
2163 out_put:
2164         uobj_put_obj_read(qp);
2165
2166         while (wr) {
2167                 if (is_ud && ud_wr(wr)->ah)
2168                         uobj_put_obj_read(ud_wr(wr)->ah);
2169                 next = wr->next;
2170                 kfree(wr);
2171                 wr = next;
2172         }
2173
2174 out:
2175         kfree(user_wr);
2176
2177         return ret;
2178 }
2179
2180 static struct ib_recv_wr *
2181 ib_uverbs_unmarshall_recv(struct uverbs_req_iter *iter, u32 wr_count,
2182                           u32 wqe_size, u32 sge_count)
2183 {
2184         struct ib_uverbs_recv_wr *user_wr;
2185         struct ib_recv_wr        *wr = NULL, *last, *next;
2186         int                       sg_ind;
2187         int                       i;
2188         int                       ret;
2189         const struct ib_sge __user *sgls;
2190         const void __user *wqes;
2191
2192         if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
2193                 return ERR_PTR(-EINVAL);
2194
2195         wqes = uverbs_request_next_ptr(iter, wqe_size * wr_count);
2196         if (IS_ERR(wqes))
2197                 return ERR_CAST(wqes);
2198         sgls = uverbs_request_next_ptr(
2199                 iter, sge_count * sizeof(struct ib_uverbs_sge));
2200         if (IS_ERR(sgls))
2201                 return ERR_CAST(sgls);
2202         ret = uverbs_request_finish(iter);
2203         if (ret)
2204                 return ERR_PTR(ret);
2205
2206         user_wr = kmalloc(wqe_size, GFP_KERNEL);
2207         if (!user_wr)
2208                 return ERR_PTR(-ENOMEM);
2209
2210         sg_ind = 0;
2211         last = NULL;
2212         for (i = 0; i < wr_count; ++i) {
2213                 if (copy_from_user(user_wr, wqes + i * wqe_size,
2214                                    wqe_size)) {
2215                         ret = -EFAULT;
2216                         goto err;
2217                 }
2218
2219                 if (user_wr->num_sge + sg_ind > sge_count) {
2220                         ret = -EINVAL;
2221                         goto err;
2222                 }
2223
2224                 if (user_wr->num_sge >=
2225                     (U32_MAX - ALIGN(sizeof *next, sizeof (struct ib_sge))) /
2226                     sizeof (struct ib_sge)) {
2227                         ret = -EINVAL;
2228                         goto err;
2229                 }
2230
2231                 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2232                                user_wr->num_sge * sizeof (struct ib_sge),
2233                                GFP_KERNEL);
2234                 if (!next) {
2235                         ret = -ENOMEM;
2236                         goto err;
2237                 }
2238
2239                 if (!last)
2240                         wr = next;
2241                 else
2242                         last->next = next;
2243                 last = next;
2244
2245                 next->next       = NULL;
2246                 next->wr_id      = user_wr->wr_id;
2247                 next->num_sge    = user_wr->num_sge;
2248
2249                 if (next->num_sge) {
2250                         next->sg_list = (void *) next +
2251                                 ALIGN(sizeof *next, sizeof (struct ib_sge));
2252                         if (copy_from_user(next->sg_list, sgls + sg_ind,
2253                                            next->num_sge *
2254                                                    sizeof(struct ib_sge))) {
2255                                 ret = -EFAULT;
2256                                 goto err;
2257                         }
2258                         sg_ind += next->num_sge;
2259                 } else
2260                         next->sg_list = NULL;
2261         }
2262
2263         kfree(user_wr);
2264         return wr;
2265
2266 err:
2267         kfree(user_wr);
2268
2269         while (wr) {
2270                 next = wr->next;
2271                 kfree(wr);
2272                 wr = next;
2273         }
2274
2275         return ERR_PTR(ret);
2276 }
2277
2278 static int ib_uverbs_post_recv(struct uverbs_attr_bundle *attrs)
2279 {
2280         struct ib_uverbs_post_recv      cmd;
2281         struct ib_uverbs_post_recv_resp resp;
2282         struct ib_recv_wr              *wr, *next;
2283         const struct ib_recv_wr        *bad_wr;
2284         struct ib_qp                   *qp;
2285         int ret, ret2;
2286         struct uverbs_req_iter iter;
2287
2288         ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
2289         if (ret)
2290                 return ret;
2291
2292         wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size,
2293                                        cmd.sge_count);
2294         if (IS_ERR(wr))
2295                 return PTR_ERR(wr);
2296
2297         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2298         if (!qp) {
2299                 ret = -EINVAL;
2300                 goto out;
2301         }
2302
2303         resp.bad_wr = 0;
2304         ret = qp->device->ops.post_recv(qp->real_qp, wr, &bad_wr);
2305
2306         uobj_put_obj_read(qp);
2307         if (ret) {
2308                 for (next = wr; next; next = next->next) {
2309                         ++resp.bad_wr;
2310                         if (next == bad_wr)
2311                                 break;
2312                 }
2313         }
2314
2315         ret2 = uverbs_response(attrs, &resp, sizeof(resp));
2316         if (ret2)
2317                 ret = ret2;
2318 out:
2319         while (wr) {
2320                 next = wr->next;
2321                 kfree(wr);
2322                 wr = next;
2323         }
2324
2325         return ret;
2326 }
2327
2328 static int ib_uverbs_post_srq_recv(struct uverbs_attr_bundle *attrs)
2329 {
2330         struct ib_uverbs_post_srq_recv      cmd;
2331         struct ib_uverbs_post_srq_recv_resp resp;
2332         struct ib_recv_wr                  *wr, *next;
2333         const struct ib_recv_wr            *bad_wr;
2334         struct ib_srq                      *srq;
2335         int ret, ret2;
2336         struct uverbs_req_iter iter;
2337
2338         ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
2339         if (ret)
2340                 return ret;
2341
2342         wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size,
2343                                        cmd.sge_count);
2344         if (IS_ERR(wr))
2345                 return PTR_ERR(wr);
2346
2347         srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
2348         if (!srq) {
2349                 ret = -EINVAL;
2350                 goto out;
2351         }
2352
2353         resp.bad_wr = 0;
2354         ret = srq->device->ops.post_srq_recv(srq, wr, &bad_wr);
2355
2356         uobj_put_obj_read(srq);
2357
2358         if (ret)
2359                 for (next = wr; next; next = next->next) {
2360                         ++resp.bad_wr;
2361                         if (next == bad_wr)
2362                                 break;
2363                 }
2364
2365         ret2 = uverbs_response(attrs, &resp, sizeof(resp));
2366         if (ret2)
2367                 ret = ret2;
2368
2369 out:
2370         while (wr) {
2371                 next = wr->next;
2372                 kfree(wr);
2373                 wr = next;
2374         }
2375
2376         return ret;
2377 }
2378
2379 static int ib_uverbs_create_ah(struct uverbs_attr_bundle *attrs)
2380 {
2381         struct ib_uverbs_create_ah       cmd;
2382         struct ib_uverbs_create_ah_resp  resp;
2383         struct ib_uobject               *uobj;
2384         struct ib_pd                    *pd;
2385         struct ib_ah                    *ah;
2386         struct rdma_ah_attr             attr = {};
2387         int ret;
2388         struct ib_device *ib_dev;
2389
2390         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2391         if (ret)
2392                 return ret;
2393
2394         uobj = uobj_alloc(UVERBS_OBJECT_AH, attrs, &ib_dev);
2395         if (IS_ERR(uobj))
2396                 return PTR_ERR(uobj);
2397
2398         if (!rdma_is_port_valid(ib_dev, cmd.attr.port_num)) {
2399                 ret = -EINVAL;
2400                 goto err;
2401         }
2402
2403         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
2404         if (!pd) {
2405                 ret = -EINVAL;
2406                 goto err;
2407         }
2408
2409         attr.type = rdma_ah_find_type(ib_dev, cmd.attr.port_num);
2410         rdma_ah_set_make_grd(&attr, false);
2411         rdma_ah_set_dlid(&attr, cmd.attr.dlid);
2412         rdma_ah_set_sl(&attr, cmd.attr.sl);
2413         rdma_ah_set_path_bits(&attr, cmd.attr.src_path_bits);
2414         rdma_ah_set_static_rate(&attr, cmd.attr.static_rate);
2415         rdma_ah_set_port_num(&attr, cmd.attr.port_num);
2416
2417         if (cmd.attr.is_global) {
2418                 rdma_ah_set_grh(&attr, NULL, cmd.attr.grh.flow_label,
2419                                 cmd.attr.grh.sgid_index,
2420                                 cmd.attr.grh.hop_limit,
2421                                 cmd.attr.grh.traffic_class);
2422                 rdma_ah_set_dgid_raw(&attr, cmd.attr.grh.dgid);
2423         } else {
2424                 rdma_ah_set_ah_flags(&attr, 0);
2425         }
2426
2427         ah = rdma_create_user_ah(pd, &attr, &attrs->driver_udata);
2428         if (IS_ERR(ah)) {
2429                 ret = PTR_ERR(ah);
2430                 goto err_put;
2431         }
2432
2433         ah->uobject  = uobj;
2434         uobj->user_handle = cmd.user_handle;
2435         uobj->object = ah;
2436
2437         resp.ah_handle = uobj->id;
2438
2439         ret = uverbs_response(attrs, &resp, sizeof(resp));
2440         if (ret)
2441                 goto err_copy;
2442
2443         uobj_put_obj_read(pd);
2444         return uobj_alloc_commit(uobj);
2445
2446 err_copy:
2447         rdma_destroy_ah(ah, RDMA_DESTROY_AH_SLEEPABLE);
2448
2449 err_put:
2450         uobj_put_obj_read(pd);
2451
2452 err:
2453         uobj_alloc_abort(uobj);
2454         return ret;
2455 }
2456
2457 static int ib_uverbs_destroy_ah(struct uverbs_attr_bundle *attrs)
2458 {
2459         struct ib_uverbs_destroy_ah cmd;
2460         int ret;
2461
2462         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2463         if (ret)
2464                 return ret;
2465
2466         return uobj_perform_destroy(UVERBS_OBJECT_AH, cmd.ah_handle, attrs);
2467 }
2468
2469 static int ib_uverbs_attach_mcast(struct uverbs_attr_bundle *attrs)
2470 {
2471         struct ib_uverbs_attach_mcast cmd;
2472         struct ib_qp                 *qp;
2473         struct ib_uqp_object         *obj;
2474         struct ib_uverbs_mcast_entry *mcast;
2475         int                           ret;
2476
2477         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2478         if (ret)
2479                 return ret;
2480
2481         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2482         if (!qp)
2483                 return -EINVAL;
2484
2485         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2486
2487         mutex_lock(&obj->mcast_lock);
2488         list_for_each_entry(mcast, &obj->mcast_list, list)
2489                 if (cmd.mlid == mcast->lid &&
2490                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2491                         ret = 0;
2492                         goto out_put;
2493                 }
2494
2495         mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
2496         if (!mcast) {
2497                 ret = -ENOMEM;
2498                 goto out_put;
2499         }
2500
2501         mcast->lid = cmd.mlid;
2502         memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
2503
2504         ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
2505         if (!ret)
2506                 list_add_tail(&mcast->list, &obj->mcast_list);
2507         else
2508                 kfree(mcast);
2509
2510 out_put:
2511         mutex_unlock(&obj->mcast_lock);
2512         uobj_put_obj_read(qp);
2513
2514         return ret;
2515 }
2516
2517 static int ib_uverbs_detach_mcast(struct uverbs_attr_bundle *attrs)
2518 {
2519         struct ib_uverbs_detach_mcast cmd;
2520         struct ib_uqp_object         *obj;
2521         struct ib_qp                 *qp;
2522         struct ib_uverbs_mcast_entry *mcast;
2523         int                           ret = -EINVAL;
2524         bool                          found = false;
2525
2526         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2527         if (ret)
2528                 return ret;
2529
2530         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2531         if (!qp)
2532                 return -EINVAL;
2533
2534         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2535         mutex_lock(&obj->mcast_lock);
2536
2537         list_for_each_entry(mcast, &obj->mcast_list, list)
2538                 if (cmd.mlid == mcast->lid &&
2539                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2540                         list_del(&mcast->list);
2541                         kfree(mcast);
2542                         found = true;
2543                         break;
2544                 }
2545
2546         if (!found) {
2547                 ret = -EINVAL;
2548                 goto out_put;
2549         }
2550
2551         ret = ib_detach_mcast(qp, (union ib_gid *)cmd.gid, cmd.mlid);
2552
2553 out_put:
2554         mutex_unlock(&obj->mcast_lock);
2555         uobj_put_obj_read(qp);
2556         return ret;
2557 }
2558
2559 struct ib_uflow_resources *flow_resources_alloc(size_t num_specs)
2560 {
2561         struct ib_uflow_resources *resources;
2562
2563         resources = kzalloc(sizeof(*resources), GFP_KERNEL);
2564
2565         if (!resources)
2566                 return NULL;
2567
2568         if (!num_specs)
2569                 goto out;
2570
2571         resources->counters =
2572                 kcalloc(num_specs, sizeof(*resources->counters), GFP_KERNEL);
2573         resources->collection =
2574                 kcalloc(num_specs, sizeof(*resources->collection), GFP_KERNEL);
2575
2576         if (!resources->counters || !resources->collection)
2577                 goto err;
2578
2579 out:
2580         resources->max = num_specs;
2581         return resources;
2582
2583 err:
2584         kfree(resources->counters);
2585         kfree(resources);
2586
2587         return NULL;
2588 }
2589 EXPORT_SYMBOL(flow_resources_alloc);
2590
2591 void ib_uverbs_flow_resources_free(struct ib_uflow_resources *uflow_res)
2592 {
2593         unsigned int i;
2594
2595         if (!uflow_res)
2596                 return;
2597
2598         for (i = 0; i < uflow_res->collection_num; i++)
2599                 atomic_dec(&uflow_res->collection[i]->usecnt);
2600
2601         for (i = 0; i < uflow_res->counters_num; i++)
2602                 atomic_dec(&uflow_res->counters[i]->usecnt);
2603
2604         kfree(uflow_res->collection);
2605         kfree(uflow_res->counters);
2606         kfree(uflow_res);
2607 }
2608 EXPORT_SYMBOL(ib_uverbs_flow_resources_free);
2609
2610 void flow_resources_add(struct ib_uflow_resources *uflow_res,
2611                         enum ib_flow_spec_type type,
2612                         void *ibobj)
2613 {
2614         WARN_ON(uflow_res->num >= uflow_res->max);
2615
2616         switch (type) {
2617         case IB_FLOW_SPEC_ACTION_HANDLE:
2618                 atomic_inc(&((struct ib_flow_action *)ibobj)->usecnt);
2619                 uflow_res->collection[uflow_res->collection_num++] =
2620                         (struct ib_flow_action *)ibobj;
2621                 break;
2622         case IB_FLOW_SPEC_ACTION_COUNT:
2623                 atomic_inc(&((struct ib_counters *)ibobj)->usecnt);
2624                 uflow_res->counters[uflow_res->counters_num++] =
2625                         (struct ib_counters *)ibobj;
2626                 break;
2627         default:
2628                 WARN_ON(1);
2629         }
2630
2631         uflow_res->num++;
2632 }
2633 EXPORT_SYMBOL(flow_resources_add);
2634
2635 static int kern_spec_to_ib_spec_action(const struct uverbs_attr_bundle *attrs,
2636                                        struct ib_uverbs_flow_spec *kern_spec,
2637                                        union ib_flow_spec *ib_spec,
2638                                        struct ib_uflow_resources *uflow_res)
2639 {
2640         ib_spec->type = kern_spec->type;
2641         switch (ib_spec->type) {
2642         case IB_FLOW_SPEC_ACTION_TAG:
2643                 if (kern_spec->flow_tag.size !=
2644                     sizeof(struct ib_uverbs_flow_spec_action_tag))
2645                         return -EINVAL;
2646
2647                 ib_spec->flow_tag.size = sizeof(struct ib_flow_spec_action_tag);
2648                 ib_spec->flow_tag.tag_id = kern_spec->flow_tag.tag_id;
2649                 break;
2650         case IB_FLOW_SPEC_ACTION_DROP:
2651                 if (kern_spec->drop.size !=
2652                     sizeof(struct ib_uverbs_flow_spec_action_drop))
2653                         return -EINVAL;
2654
2655                 ib_spec->drop.size = sizeof(struct ib_flow_spec_action_drop);
2656                 break;
2657         case IB_FLOW_SPEC_ACTION_HANDLE:
2658                 if (kern_spec->action.size !=
2659                     sizeof(struct ib_uverbs_flow_spec_action_handle))
2660                         return -EOPNOTSUPP;
2661                 ib_spec->action.act = uobj_get_obj_read(flow_action,
2662                                                         UVERBS_OBJECT_FLOW_ACTION,
2663                                                         kern_spec->action.handle,
2664                                                         attrs);
2665                 if (!ib_spec->action.act)
2666                         return -EINVAL;
2667                 ib_spec->action.size =
2668                         sizeof(struct ib_flow_spec_action_handle);
2669                 flow_resources_add(uflow_res,
2670                                    IB_FLOW_SPEC_ACTION_HANDLE,
2671                                    ib_spec->action.act);
2672                 uobj_put_obj_read(ib_spec->action.act);
2673                 break;
2674         case IB_FLOW_SPEC_ACTION_COUNT:
2675                 if (kern_spec->flow_count.size !=
2676                         sizeof(struct ib_uverbs_flow_spec_action_count))
2677                         return -EINVAL;
2678                 ib_spec->flow_count.counters =
2679                         uobj_get_obj_read(counters,
2680                                           UVERBS_OBJECT_COUNTERS,
2681                                           kern_spec->flow_count.handle,
2682                                           attrs);
2683                 if (!ib_spec->flow_count.counters)
2684                         return -EINVAL;
2685                 ib_spec->flow_count.size =
2686                                 sizeof(struct ib_flow_spec_action_count);
2687                 flow_resources_add(uflow_res,
2688                                    IB_FLOW_SPEC_ACTION_COUNT,
2689                                    ib_spec->flow_count.counters);
2690                 uobj_put_obj_read(ib_spec->flow_count.counters);
2691                 break;
2692         default:
2693                 return -EINVAL;
2694         }
2695         return 0;
2696 }
2697
2698 static size_t kern_spec_filter_sz(const struct ib_uverbs_flow_spec_hdr *spec)
2699 {
2700         /* Returns user space filter size, includes padding */
2701         return (spec->size - sizeof(struct ib_uverbs_flow_spec_hdr)) / 2;
2702 }
2703
2704 static ssize_t spec_filter_size(const void *kern_spec_filter, u16 kern_filter_size,
2705                                 u16 ib_real_filter_sz)
2706 {
2707         /*
2708          * User space filter structures must be 64 bit aligned, otherwise this
2709          * may pass, but we won't handle additional new attributes.
2710          */
2711
2712         if (kern_filter_size > ib_real_filter_sz) {
2713                 if (memchr_inv(kern_spec_filter +
2714                                ib_real_filter_sz, 0,
2715                                kern_filter_size - ib_real_filter_sz))
2716                         return -EINVAL;
2717                 return ib_real_filter_sz;
2718         }
2719         return kern_filter_size;
2720 }
2721
2722 int ib_uverbs_kern_spec_to_ib_spec_filter(enum ib_flow_spec_type type,
2723                                           const void *kern_spec_mask,
2724                                           const void *kern_spec_val,
2725                                           size_t kern_filter_sz,
2726                                           union ib_flow_spec *ib_spec)
2727 {
2728         ssize_t actual_filter_sz;
2729         ssize_t ib_filter_sz;
2730
2731         /* User flow spec size must be aligned to 4 bytes */
2732         if (kern_filter_sz != ALIGN(kern_filter_sz, 4))
2733                 return -EINVAL;
2734
2735         ib_spec->type = type;
2736
2737         if (ib_spec->type == (IB_FLOW_SPEC_INNER | IB_FLOW_SPEC_VXLAN_TUNNEL))
2738                 return -EINVAL;
2739
2740         switch (ib_spec->type & ~IB_FLOW_SPEC_INNER) {
2741         case IB_FLOW_SPEC_ETH:
2742                 ib_filter_sz = offsetof(struct ib_flow_eth_filter, real_sz);
2743                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2744                                                     kern_filter_sz,
2745                                                     ib_filter_sz);
2746                 if (actual_filter_sz <= 0)
2747                         return -EINVAL;
2748                 ib_spec->size = sizeof(struct ib_flow_spec_eth);
2749                 memcpy(&ib_spec->eth.val, kern_spec_val, actual_filter_sz);
2750                 memcpy(&ib_spec->eth.mask, kern_spec_mask, actual_filter_sz);
2751                 break;
2752         case IB_FLOW_SPEC_IPV4:
2753                 ib_filter_sz = offsetof(struct ib_flow_ipv4_filter, real_sz);
2754                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2755                                                     kern_filter_sz,
2756                                                     ib_filter_sz);
2757                 if (actual_filter_sz <= 0)
2758                         return -EINVAL;
2759                 ib_spec->size = sizeof(struct ib_flow_spec_ipv4);
2760                 memcpy(&ib_spec->ipv4.val, kern_spec_val, actual_filter_sz);
2761                 memcpy(&ib_spec->ipv4.mask, kern_spec_mask, actual_filter_sz);
2762                 break;
2763         case IB_FLOW_SPEC_IPV6:
2764                 ib_filter_sz = offsetof(struct ib_flow_ipv6_filter, real_sz);
2765                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2766                                                     kern_filter_sz,
2767                                                     ib_filter_sz);
2768                 if (actual_filter_sz <= 0)
2769                         return -EINVAL;
2770                 ib_spec->size = sizeof(struct ib_flow_spec_ipv6);
2771                 memcpy(&ib_spec->ipv6.val, kern_spec_val, actual_filter_sz);
2772                 memcpy(&ib_spec->ipv6.mask, kern_spec_mask, actual_filter_sz);
2773
2774                 if ((ntohl(ib_spec->ipv6.mask.flow_label)) >= BIT(20) ||
2775                     (ntohl(ib_spec->ipv6.val.flow_label)) >= BIT(20))
2776                         return -EINVAL;
2777                 break;
2778         case IB_FLOW_SPEC_TCP:
2779         case IB_FLOW_SPEC_UDP:
2780                 ib_filter_sz = offsetof(struct ib_flow_tcp_udp_filter, real_sz);
2781                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2782                                                     kern_filter_sz,
2783                                                     ib_filter_sz);
2784                 if (actual_filter_sz <= 0)
2785                         return -EINVAL;
2786                 ib_spec->size = sizeof(struct ib_flow_spec_tcp_udp);
2787                 memcpy(&ib_spec->tcp_udp.val, kern_spec_val, actual_filter_sz);
2788                 memcpy(&ib_spec->tcp_udp.mask, kern_spec_mask, actual_filter_sz);
2789                 break;
2790         case IB_FLOW_SPEC_VXLAN_TUNNEL:
2791                 ib_filter_sz = offsetof(struct ib_flow_tunnel_filter, real_sz);
2792                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2793                                                     kern_filter_sz,
2794                                                     ib_filter_sz);
2795                 if (actual_filter_sz <= 0)
2796                         return -EINVAL;
2797                 ib_spec->tunnel.size = sizeof(struct ib_flow_spec_tunnel);
2798                 memcpy(&ib_spec->tunnel.val, kern_spec_val, actual_filter_sz);
2799                 memcpy(&ib_spec->tunnel.mask, kern_spec_mask, actual_filter_sz);
2800
2801                 if ((ntohl(ib_spec->tunnel.mask.tunnel_id)) >= BIT(24) ||
2802                     (ntohl(ib_spec->tunnel.val.tunnel_id)) >= BIT(24))
2803                         return -EINVAL;
2804                 break;
2805         case IB_FLOW_SPEC_ESP:
2806                 ib_filter_sz = offsetof(struct ib_flow_esp_filter, real_sz);
2807                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2808                                                     kern_filter_sz,
2809                                                     ib_filter_sz);
2810                 if (actual_filter_sz <= 0)
2811                         return -EINVAL;
2812                 ib_spec->esp.size = sizeof(struct ib_flow_spec_esp);
2813                 memcpy(&ib_spec->esp.val, kern_spec_val, actual_filter_sz);
2814                 memcpy(&ib_spec->esp.mask, kern_spec_mask, actual_filter_sz);
2815                 break;
2816         case IB_FLOW_SPEC_GRE:
2817                 ib_filter_sz = offsetof(struct ib_flow_gre_filter, real_sz);
2818                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2819                                                     kern_filter_sz,
2820                                                     ib_filter_sz);
2821                 if (actual_filter_sz <= 0)
2822                         return -EINVAL;
2823                 ib_spec->gre.size = sizeof(struct ib_flow_spec_gre);
2824                 memcpy(&ib_spec->gre.val, kern_spec_val, actual_filter_sz);
2825                 memcpy(&ib_spec->gre.mask, kern_spec_mask, actual_filter_sz);
2826                 break;
2827         case IB_FLOW_SPEC_MPLS:
2828                 ib_filter_sz = offsetof(struct ib_flow_mpls_filter, real_sz);
2829                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2830                                                     kern_filter_sz,
2831                                                     ib_filter_sz);
2832                 if (actual_filter_sz <= 0)
2833                         return -EINVAL;
2834                 ib_spec->mpls.size = sizeof(struct ib_flow_spec_mpls);
2835                 memcpy(&ib_spec->mpls.val, kern_spec_val, actual_filter_sz);
2836                 memcpy(&ib_spec->mpls.mask, kern_spec_mask, actual_filter_sz);
2837                 break;
2838         default:
2839                 return -EINVAL;
2840         }
2841         return 0;
2842 }
2843
2844 static int kern_spec_to_ib_spec_filter(struct ib_uverbs_flow_spec *kern_spec,
2845                                        union ib_flow_spec *ib_spec)
2846 {
2847         ssize_t kern_filter_sz;
2848         void *kern_spec_mask;
2849         void *kern_spec_val;
2850
2851         kern_filter_sz = kern_spec_filter_sz(&kern_spec->hdr);
2852
2853         kern_spec_val = (void *)kern_spec +
2854                 sizeof(struct ib_uverbs_flow_spec_hdr);
2855         kern_spec_mask = kern_spec_val + kern_filter_sz;
2856
2857         return ib_uverbs_kern_spec_to_ib_spec_filter(kern_spec->type,
2858                                                      kern_spec_mask,
2859                                                      kern_spec_val,
2860                                                      kern_filter_sz, ib_spec);
2861 }
2862
2863 static int kern_spec_to_ib_spec(struct uverbs_attr_bundle *attrs,
2864                                 struct ib_uverbs_flow_spec *kern_spec,
2865                                 union ib_flow_spec *ib_spec,
2866                                 struct ib_uflow_resources *uflow_res)
2867 {
2868         if (kern_spec->reserved)
2869                 return -EINVAL;
2870
2871         if (kern_spec->type >= IB_FLOW_SPEC_ACTION_TAG)
2872                 return kern_spec_to_ib_spec_action(attrs, kern_spec, ib_spec,
2873                                                    uflow_res);
2874         else
2875                 return kern_spec_to_ib_spec_filter(kern_spec, ib_spec);
2876 }
2877
2878 static int ib_uverbs_ex_create_wq(struct uverbs_attr_bundle *attrs)
2879 {
2880         struct ib_uverbs_ex_create_wq cmd;
2881         struct ib_uverbs_ex_create_wq_resp resp = {};
2882         struct ib_uwq_object           *obj;
2883         int err = 0;
2884         struct ib_cq *cq;
2885         struct ib_pd *pd;
2886         struct ib_wq *wq;
2887         struct ib_wq_init_attr wq_init_attr = {};
2888         struct ib_device *ib_dev;
2889
2890         err = uverbs_request(attrs, &cmd, sizeof(cmd));
2891         if (err)
2892                 return err;
2893
2894         if (cmd.comp_mask)
2895                 return -EOPNOTSUPP;
2896
2897         obj = (struct ib_uwq_object *)uobj_alloc(UVERBS_OBJECT_WQ, attrs,
2898                                                  &ib_dev);
2899         if (IS_ERR(obj))
2900                 return PTR_ERR(obj);
2901
2902         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
2903         if (!pd) {
2904                 err = -EINVAL;
2905                 goto err_uobj;
2906         }
2907
2908         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
2909         if (!cq) {
2910                 err = -EINVAL;
2911                 goto err_put_pd;
2912         }
2913
2914         wq_init_attr.cq = cq;
2915         wq_init_attr.max_sge = cmd.max_sge;
2916         wq_init_attr.max_wr = cmd.max_wr;
2917         wq_init_attr.wq_context = attrs->ufile;
2918         wq_init_attr.wq_type = cmd.wq_type;
2919         wq_init_attr.event_handler = ib_uverbs_wq_event_handler;
2920         wq_init_attr.create_flags = cmd.create_flags;
2921         obj->uevent.events_reported = 0;
2922         INIT_LIST_HEAD(&obj->uevent.event_list);
2923
2924         wq = pd->device->ops.create_wq(pd, &wq_init_attr, &attrs->driver_udata);
2925         if (IS_ERR(wq)) {
2926                 err = PTR_ERR(wq);
2927                 goto err_put_cq;
2928         }
2929
2930         wq->uobject = &obj->uevent.uobject;
2931         obj->uevent.uobject.object = wq;
2932         wq->wq_type = wq_init_attr.wq_type;
2933         wq->cq = cq;
2934         wq->pd = pd;
2935         wq->device = pd->device;
2936         wq->wq_context = wq_init_attr.wq_context;
2937         atomic_set(&wq->usecnt, 0);
2938         atomic_inc(&pd->usecnt);
2939         atomic_inc(&cq->usecnt);
2940         wq->uobject = &obj->uevent.uobject;
2941         obj->uevent.uobject.object = wq;
2942
2943         memset(&resp, 0, sizeof(resp));
2944         resp.wq_handle = obj->uevent.uobject.id;
2945         resp.max_sge = wq_init_attr.max_sge;
2946         resp.max_wr = wq_init_attr.max_wr;
2947         resp.wqn = wq->wq_num;
2948         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
2949         err = uverbs_response(attrs, &resp, sizeof(resp));
2950         if (err)
2951                 goto err_copy;
2952
2953         uobj_put_obj_read(pd);
2954         uobj_put_obj_read(cq);
2955         return uobj_alloc_commit(&obj->uevent.uobject);
2956
2957 err_copy:
2958         ib_destroy_wq(wq);
2959 err_put_cq:
2960         uobj_put_obj_read(cq);
2961 err_put_pd:
2962         uobj_put_obj_read(pd);
2963 err_uobj:
2964         uobj_alloc_abort(&obj->uevent.uobject);
2965
2966         return err;
2967 }
2968
2969 static int ib_uverbs_ex_destroy_wq(struct uverbs_attr_bundle *attrs)
2970 {
2971         struct ib_uverbs_ex_destroy_wq  cmd;
2972         struct ib_uverbs_ex_destroy_wq_resp     resp = {};
2973         struct ib_uobject               *uobj;
2974         struct ib_uwq_object            *obj;
2975         int                             ret;
2976
2977         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2978         if (ret)
2979                 return ret;
2980
2981         if (cmd.comp_mask)
2982                 return -EOPNOTSUPP;
2983
2984         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
2985         uobj = uobj_get_destroy(UVERBS_OBJECT_WQ, cmd.wq_handle, attrs);
2986         if (IS_ERR(uobj))
2987                 return PTR_ERR(uobj);
2988
2989         obj = container_of(uobj, struct ib_uwq_object, uevent.uobject);
2990         resp.events_reported = obj->uevent.events_reported;
2991
2992         uobj_put_destroy(uobj);
2993
2994         return uverbs_response(attrs, &resp, sizeof(resp));
2995 }
2996
2997 static int ib_uverbs_ex_modify_wq(struct uverbs_attr_bundle *attrs)
2998 {
2999         struct ib_uverbs_ex_modify_wq cmd;
3000         struct ib_wq *wq;
3001         struct ib_wq_attr wq_attr = {};
3002         int ret;
3003
3004         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3005         if (ret)
3006                 return ret;
3007
3008         if (!cmd.attr_mask)
3009                 return -EINVAL;
3010
3011         if (cmd.attr_mask > (IB_WQ_STATE | IB_WQ_CUR_STATE | IB_WQ_FLAGS))
3012                 return -EINVAL;
3013
3014         wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ, cmd.wq_handle, attrs);
3015         if (!wq)
3016                 return -EINVAL;
3017
3018         wq_attr.curr_wq_state = cmd.curr_wq_state;
3019         wq_attr.wq_state = cmd.wq_state;
3020         if (cmd.attr_mask & IB_WQ_FLAGS) {
3021                 wq_attr.flags = cmd.flags;
3022                 wq_attr.flags_mask = cmd.flags_mask;
3023         }
3024         ret = wq->device->ops.modify_wq(wq, &wq_attr, cmd.attr_mask,
3025                                         &attrs->driver_udata);
3026         uobj_put_obj_read(wq);
3027         return ret;
3028 }
3029
3030 static int ib_uverbs_ex_create_rwq_ind_table(struct uverbs_attr_bundle *attrs)
3031 {
3032         struct ib_uverbs_ex_create_rwq_ind_table cmd;
3033         struct ib_uverbs_ex_create_rwq_ind_table_resp  resp = {};
3034         struct ib_uobject                 *uobj;
3035         int err;
3036         struct ib_rwq_ind_table_init_attr init_attr = {};
3037         struct ib_rwq_ind_table *rwq_ind_tbl;
3038         struct ib_wq    **wqs = NULL;
3039         u32 *wqs_handles = NULL;
3040         struct ib_wq    *wq = NULL;
3041         int i, j, num_read_wqs;
3042         u32 num_wq_handles;
3043         struct uverbs_req_iter iter;
3044         struct ib_device *ib_dev;
3045
3046         err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
3047         if (err)
3048                 return err;
3049
3050         if (cmd.comp_mask)
3051                 return -EOPNOTSUPP;
3052
3053         if (cmd.log_ind_tbl_size > IB_USER_VERBS_MAX_LOG_IND_TBL_SIZE)
3054                 return -EINVAL;
3055
3056         num_wq_handles = 1 << cmd.log_ind_tbl_size;
3057         wqs_handles = kcalloc(num_wq_handles, sizeof(*wqs_handles),
3058                               GFP_KERNEL);
3059         if (!wqs_handles)
3060                 return -ENOMEM;
3061
3062         err = uverbs_request_next(&iter, wqs_handles,
3063                                   num_wq_handles * sizeof(__u32));
3064         if (err)
3065                 goto err_free;
3066
3067         err = uverbs_request_finish(&iter);
3068         if (err)
3069                 goto err_free;
3070
3071         wqs = kcalloc(num_wq_handles, sizeof(*wqs), GFP_KERNEL);
3072         if (!wqs) {
3073                 err = -ENOMEM;
3074                 goto  err_free;
3075         }
3076
3077         for (num_read_wqs = 0; num_read_wqs < num_wq_handles;
3078                         num_read_wqs++) {
3079                 wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ,
3080                                        wqs_handles[num_read_wqs], attrs);
3081                 if (!wq) {
3082                         err = -EINVAL;
3083                         goto put_wqs;
3084                 }
3085
3086                 wqs[num_read_wqs] = wq;
3087         }
3088
3089         uobj = uobj_alloc(UVERBS_OBJECT_RWQ_IND_TBL, attrs, &ib_dev);
3090         if (IS_ERR(uobj)) {
3091                 err = PTR_ERR(uobj);
3092                 goto put_wqs;
3093         }
3094
3095         init_attr.log_ind_tbl_size = cmd.log_ind_tbl_size;
3096         init_attr.ind_tbl = wqs;
3097
3098         rwq_ind_tbl = ib_dev->ops.create_rwq_ind_table(ib_dev, &init_attr,
3099                                                        &attrs->driver_udata);
3100
3101         if (IS_ERR(rwq_ind_tbl)) {
3102                 err = PTR_ERR(rwq_ind_tbl);
3103                 goto err_uobj;
3104         }
3105
3106         rwq_ind_tbl->ind_tbl = wqs;
3107         rwq_ind_tbl->log_ind_tbl_size = init_attr.log_ind_tbl_size;
3108         rwq_ind_tbl->uobject = uobj;
3109         uobj->object = rwq_ind_tbl;
3110         rwq_ind_tbl->device = ib_dev;
3111         atomic_set(&rwq_ind_tbl->usecnt, 0);
3112
3113         for (i = 0; i < num_wq_handles; i++)
3114                 atomic_inc(&wqs[i]->usecnt);
3115
3116         resp.ind_tbl_handle = uobj->id;
3117         resp.ind_tbl_num = rwq_ind_tbl->ind_tbl_num;
3118         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
3119
3120         err = uverbs_response(attrs, &resp, sizeof(resp));
3121         if (err)
3122                 goto err_copy;
3123
3124         kfree(wqs_handles);
3125
3126         for (j = 0; j < num_read_wqs; j++)
3127                 uobj_put_obj_read(wqs[j]);
3128
3129         return uobj_alloc_commit(uobj);
3130
3131 err_copy:
3132         ib_destroy_rwq_ind_table(rwq_ind_tbl);
3133 err_uobj:
3134         uobj_alloc_abort(uobj);
3135 put_wqs:
3136         for (j = 0; j < num_read_wqs; j++)
3137                 uobj_put_obj_read(wqs[j]);
3138 err_free:
3139         kfree(wqs_handles);
3140         kfree(wqs);
3141         return err;
3142 }
3143
3144 static int ib_uverbs_ex_destroy_rwq_ind_table(struct uverbs_attr_bundle *attrs)
3145 {
3146         struct ib_uverbs_ex_destroy_rwq_ind_table cmd;
3147         int ret;
3148
3149         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3150         if (ret)
3151                 return ret;
3152
3153         if (cmd.comp_mask)
3154                 return -EOPNOTSUPP;
3155
3156         return uobj_perform_destroy(UVERBS_OBJECT_RWQ_IND_TBL,
3157                                     cmd.ind_tbl_handle, attrs);
3158 }
3159
3160 static int ib_uverbs_ex_create_flow(struct uverbs_attr_bundle *attrs)
3161 {
3162         struct ib_uverbs_create_flow      cmd;
3163         struct ib_uverbs_create_flow_resp resp;
3164         struct ib_uobject                 *uobj;
3165         struct ib_flow                    *flow_id;
3166         struct ib_uverbs_flow_attr        *kern_flow_attr;
3167         struct ib_flow_attr               *flow_attr;
3168         struct ib_qp                      *qp;
3169         struct ib_uflow_resources         *uflow_res;
3170         struct ib_uverbs_flow_spec_hdr    *kern_spec;
3171         struct uverbs_req_iter iter;
3172         int err;
3173         void *ib_spec;
3174         int i;
3175         struct ib_device *ib_dev;
3176
3177         err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
3178         if (err)
3179                 return err;
3180
3181         if (cmd.comp_mask)
3182                 return -EINVAL;
3183
3184         if (!capable(CAP_NET_RAW))
3185                 return -EPERM;
3186
3187         if (cmd.flow_attr.flags >= IB_FLOW_ATTR_FLAGS_RESERVED)
3188                 return -EINVAL;
3189
3190         if ((cmd.flow_attr.flags & IB_FLOW_ATTR_FLAGS_DONT_TRAP) &&
3191             ((cmd.flow_attr.type == IB_FLOW_ATTR_ALL_DEFAULT) ||
3192              (cmd.flow_attr.type == IB_FLOW_ATTR_MC_DEFAULT)))
3193                 return -EINVAL;
3194
3195         if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS)
3196                 return -EINVAL;
3197
3198         if (cmd.flow_attr.size >
3199             (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec)))
3200                 return -EINVAL;
3201
3202         if (cmd.flow_attr.reserved[0] ||
3203             cmd.flow_attr.reserved[1])
3204                 return -EINVAL;
3205
3206         if (cmd.flow_attr.num_of_specs) {
3207                 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size,
3208                                          GFP_KERNEL);
3209                 if (!kern_flow_attr)
3210                         return -ENOMEM;
3211
3212                 *kern_flow_attr = cmd.flow_attr;
3213                 err = uverbs_request_next(&iter, &kern_flow_attr->flow_specs,
3214                                           cmd.flow_attr.size);
3215                 if (err)
3216                         goto err_free_attr;
3217         } else {
3218                 kern_flow_attr = &cmd.flow_attr;
3219         }
3220
3221         err = uverbs_request_finish(&iter);
3222         if (err)
3223                 goto err_free_attr;
3224
3225         uobj = uobj_alloc(UVERBS_OBJECT_FLOW, attrs, &ib_dev);
3226         if (IS_ERR(uobj)) {
3227                 err = PTR_ERR(uobj);
3228                 goto err_free_attr;
3229         }
3230
3231         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
3232         if (!qp) {
3233                 err = -EINVAL;
3234                 goto err_uobj;
3235         }
3236
3237         if (qp->qp_type != IB_QPT_UD && qp->qp_type != IB_QPT_RAW_PACKET) {
3238                 err = -EINVAL;
3239                 goto err_put;
3240         }
3241
3242         flow_attr = kzalloc(struct_size(flow_attr, flows,
3243                                 cmd.flow_attr.num_of_specs), GFP_KERNEL);
3244         if (!flow_attr) {
3245                 err = -ENOMEM;
3246                 goto err_put;
3247         }
3248         uflow_res = flow_resources_alloc(cmd.flow_attr.num_of_specs);
3249         if (!uflow_res) {
3250                 err = -ENOMEM;
3251                 goto err_free_flow_attr;
3252         }
3253
3254         flow_attr->type = kern_flow_attr->type;
3255         flow_attr->priority = kern_flow_attr->priority;
3256         flow_attr->num_of_specs = kern_flow_attr->num_of_specs;
3257         flow_attr->port = kern_flow_attr->port;
3258         flow_attr->flags = kern_flow_attr->flags;
3259         flow_attr->size = sizeof(*flow_attr);
3260
3261         kern_spec = kern_flow_attr->flow_specs;
3262         ib_spec = flow_attr + 1;
3263         for (i = 0; i < flow_attr->num_of_specs &&
3264                         cmd.flow_attr.size >= sizeof(*kern_spec) &&
3265                         cmd.flow_attr.size >= kern_spec->size;
3266              i++) {
3267                 err = kern_spec_to_ib_spec(
3268                                 attrs, (struct ib_uverbs_flow_spec *)kern_spec,
3269                                 ib_spec, uflow_res);
3270                 if (err)
3271                         goto err_free;
3272
3273                 flow_attr->size +=
3274                         ((union ib_flow_spec *) ib_spec)->size;
3275                 cmd.flow_attr.size -= kern_spec->size;
3276                 kern_spec = ((void *)kern_spec) + kern_spec->size;
3277                 ib_spec += ((union ib_flow_spec *) ib_spec)->size;
3278         }
3279         if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) {
3280                 pr_warn("create flow failed, flow %d: %d bytes left from uverb cmd\n",
3281                         i, cmd.flow_attr.size);
3282                 err = -EINVAL;
3283                 goto err_free;
3284         }
3285
3286         flow_id = qp->device->ops.create_flow(
3287                 qp, flow_attr, IB_FLOW_DOMAIN_USER, &attrs->driver_udata);
3288
3289         if (IS_ERR(flow_id)) {
3290                 err = PTR_ERR(flow_id);
3291                 goto err_free;
3292         }
3293
3294         ib_set_flow(uobj, flow_id, qp, qp->device, uflow_res);
3295
3296         memset(&resp, 0, sizeof(resp));
3297         resp.flow_handle = uobj->id;
3298
3299         err = uverbs_response(attrs, &resp, sizeof(resp));
3300         if (err)
3301                 goto err_copy;
3302
3303         uobj_put_obj_read(qp);
3304         kfree(flow_attr);
3305         if (cmd.flow_attr.num_of_specs)
3306                 kfree(kern_flow_attr);
3307         return uobj_alloc_commit(uobj);
3308 err_copy:
3309         if (!qp->device->ops.destroy_flow(flow_id))
3310                 atomic_dec(&qp->usecnt);
3311 err_free:
3312         ib_uverbs_flow_resources_free(uflow_res);
3313 err_free_flow_attr:
3314         kfree(flow_attr);
3315 err_put:
3316         uobj_put_obj_read(qp);
3317 err_uobj:
3318         uobj_alloc_abort(uobj);
3319 err_free_attr:
3320         if (cmd.flow_attr.num_of_specs)
3321                 kfree(kern_flow_attr);
3322         return err;
3323 }
3324
3325 static int ib_uverbs_ex_destroy_flow(struct uverbs_attr_bundle *attrs)
3326 {
3327         struct ib_uverbs_destroy_flow   cmd;
3328         int                             ret;
3329
3330         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3331         if (ret)
3332                 return ret;
3333
3334         if (cmd.comp_mask)
3335                 return -EINVAL;
3336
3337         return uobj_perform_destroy(UVERBS_OBJECT_FLOW, cmd.flow_handle, attrs);
3338 }
3339
3340 static int __uverbs_create_xsrq(struct uverbs_attr_bundle *attrs,
3341                                 struct ib_uverbs_create_xsrq *cmd,
3342                                 struct ib_udata *udata)
3343 {
3344         struct ib_uverbs_create_srq_resp resp;
3345         struct ib_usrq_object           *obj;
3346         struct ib_pd                    *pd;
3347         struct ib_srq                   *srq;
3348         struct ib_uobject               *uninitialized_var(xrcd_uobj);
3349         struct ib_srq_init_attr          attr;
3350         int ret;
3351         struct ib_device *ib_dev;
3352
3353         obj = (struct ib_usrq_object *)uobj_alloc(UVERBS_OBJECT_SRQ, attrs,
3354                                                   &ib_dev);
3355         if (IS_ERR(obj))
3356                 return PTR_ERR(obj);
3357
3358         if (cmd->srq_type == IB_SRQT_TM)
3359                 attr.ext.tag_matching.max_num_tags = cmd->max_num_tags;
3360
3361         if (cmd->srq_type == IB_SRQT_XRC) {
3362                 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->xrcd_handle,
3363                                           attrs);
3364                 if (IS_ERR(xrcd_uobj)) {
3365                         ret = -EINVAL;
3366                         goto err;
3367                 }
3368
3369                 attr.ext.xrc.xrcd = (struct ib_xrcd *)xrcd_uobj->object;
3370                 if (!attr.ext.xrc.xrcd) {
3371                         ret = -EINVAL;
3372                         goto err_put_xrcd;
3373                 }
3374
3375                 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
3376                 atomic_inc(&obj->uxrcd->refcnt);
3377         }
3378
3379         if (ib_srq_has_cq(cmd->srq_type)) {
3380                 attr.ext.cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ,
3381                                                 cmd->cq_handle, attrs);
3382                 if (!attr.ext.cq) {
3383                         ret = -EINVAL;
3384                         goto err_put_xrcd;
3385                 }
3386         }
3387
3388         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle, attrs);
3389         if (!pd) {
3390                 ret = -EINVAL;
3391                 goto err_put_cq;
3392         }
3393
3394         attr.event_handler  = ib_uverbs_srq_event_handler;
3395         attr.srq_context    = attrs->ufile;
3396         attr.srq_type       = cmd->srq_type;
3397         attr.attr.max_wr    = cmd->max_wr;
3398         attr.attr.max_sge   = cmd->max_sge;
3399         attr.attr.srq_limit = cmd->srq_limit;
3400
3401         obj->uevent.events_reported = 0;
3402         INIT_LIST_HEAD(&obj->uevent.event_list);
3403
3404         srq = pd->device->ops.create_srq(pd, &attr, udata);
3405         if (IS_ERR(srq)) {
3406                 ret = PTR_ERR(srq);
3407                 goto err_put;
3408         }
3409
3410         srq->device        = pd->device;
3411         srq->pd            = pd;
3412         srq->srq_type      = cmd->srq_type;
3413         srq->uobject       = &obj->uevent.uobject;
3414         srq->event_handler = attr.event_handler;
3415         srq->srq_context   = attr.srq_context;
3416
3417         if (ib_srq_has_cq(cmd->srq_type)) {
3418                 srq->ext.cq       = attr.ext.cq;
3419                 atomic_inc(&attr.ext.cq->usecnt);
3420         }
3421
3422         if (cmd->srq_type == IB_SRQT_XRC) {
3423                 srq->ext.xrc.xrcd = attr.ext.xrc.xrcd;
3424                 atomic_inc(&attr.ext.xrc.xrcd->usecnt);
3425         }
3426
3427         atomic_inc(&pd->usecnt);
3428         atomic_set(&srq->usecnt, 0);
3429
3430         obj->uevent.uobject.object = srq;
3431         obj->uevent.uobject.user_handle = cmd->user_handle;
3432
3433         memset(&resp, 0, sizeof resp);
3434         resp.srq_handle = obj->uevent.uobject.id;
3435         resp.max_wr     = attr.attr.max_wr;
3436         resp.max_sge    = attr.attr.max_sge;
3437         if (cmd->srq_type == IB_SRQT_XRC)
3438                 resp.srqn = srq->ext.xrc.srq_num;
3439
3440         ret = uverbs_response(attrs, &resp, sizeof(resp));
3441         if (ret)
3442                 goto err_copy;
3443
3444         if (cmd->srq_type == IB_SRQT_XRC)
3445                 uobj_put_read(xrcd_uobj);
3446
3447         if (ib_srq_has_cq(cmd->srq_type))
3448                 uobj_put_obj_read(attr.ext.cq);
3449
3450         uobj_put_obj_read(pd);
3451         return uobj_alloc_commit(&obj->uevent.uobject);
3452
3453 err_copy:
3454         ib_destroy_srq(srq);
3455
3456 err_put:
3457         uobj_put_obj_read(pd);
3458
3459 err_put_cq:
3460         if (ib_srq_has_cq(cmd->srq_type))
3461                 uobj_put_obj_read(attr.ext.cq);
3462
3463 err_put_xrcd:
3464         if (cmd->srq_type == IB_SRQT_XRC) {
3465                 atomic_dec(&obj->uxrcd->refcnt);
3466                 uobj_put_read(xrcd_uobj);
3467         }
3468
3469 err:
3470         uobj_alloc_abort(&obj->uevent.uobject);
3471         return ret;
3472 }
3473
3474 static int ib_uverbs_create_srq(struct uverbs_attr_bundle *attrs)
3475 {
3476         struct ib_uverbs_create_srq      cmd;
3477         struct ib_uverbs_create_xsrq     xcmd;
3478         int ret;
3479
3480         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3481         if (ret)
3482                 return ret;
3483
3484         memset(&xcmd, 0, sizeof(xcmd));
3485         xcmd.response    = cmd.response;
3486         xcmd.user_handle = cmd.user_handle;
3487         xcmd.srq_type    = IB_SRQT_BASIC;
3488         xcmd.pd_handle   = cmd.pd_handle;
3489         xcmd.max_wr      = cmd.max_wr;
3490         xcmd.max_sge     = cmd.max_sge;
3491         xcmd.srq_limit   = cmd.srq_limit;
3492
3493         return __uverbs_create_xsrq(attrs, &xcmd, &attrs->driver_udata);
3494 }
3495
3496 static int ib_uverbs_create_xsrq(struct uverbs_attr_bundle *attrs)
3497 {
3498         struct ib_uverbs_create_xsrq     cmd;
3499         int ret;
3500
3501         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3502         if (ret)
3503                 return ret;
3504
3505         return __uverbs_create_xsrq(attrs, &cmd, &attrs->driver_udata);
3506 }
3507
3508 static int ib_uverbs_modify_srq(struct uverbs_attr_bundle *attrs)
3509 {
3510         struct ib_uverbs_modify_srq cmd;
3511         struct ib_srq              *srq;
3512         struct ib_srq_attr          attr;
3513         int                         ret;
3514
3515         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3516         if (ret)
3517                 return ret;
3518
3519         srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
3520         if (!srq)
3521                 return -EINVAL;
3522
3523         attr.max_wr    = cmd.max_wr;
3524         attr.srq_limit = cmd.srq_limit;
3525
3526         ret = srq->device->ops.modify_srq(srq, &attr, cmd.attr_mask,
3527                                           &attrs->driver_udata);
3528
3529         uobj_put_obj_read(srq);
3530
3531         return ret;
3532 }
3533
3534 static int ib_uverbs_query_srq(struct uverbs_attr_bundle *attrs)
3535 {
3536         struct ib_uverbs_query_srq      cmd;
3537         struct ib_uverbs_query_srq_resp resp;
3538         struct ib_srq_attr              attr;
3539         struct ib_srq                   *srq;
3540         int                             ret;
3541
3542         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3543         if (ret)
3544                 return ret;
3545
3546         srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
3547         if (!srq)
3548                 return -EINVAL;
3549
3550         ret = ib_query_srq(srq, &attr);
3551
3552         uobj_put_obj_read(srq);
3553
3554         if (ret)
3555                 return ret;
3556
3557         memset(&resp, 0, sizeof resp);
3558
3559         resp.max_wr    = attr.max_wr;
3560         resp.max_sge   = attr.max_sge;
3561         resp.srq_limit = attr.srq_limit;
3562
3563         return uverbs_response(attrs, &resp, sizeof(resp));
3564 }
3565
3566 static int ib_uverbs_destroy_srq(struct uverbs_attr_bundle *attrs)
3567 {
3568         struct ib_uverbs_destroy_srq      cmd;
3569         struct ib_uverbs_destroy_srq_resp resp;
3570         struct ib_uobject                *uobj;
3571         struct ib_uevent_object          *obj;
3572         int ret;
3573
3574         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3575         if (ret)
3576                 return ret;
3577
3578         uobj = uobj_get_destroy(UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
3579         if (IS_ERR(uobj))
3580                 return PTR_ERR(uobj);
3581
3582         obj = container_of(uobj, struct ib_uevent_object, uobject);
3583         memset(&resp, 0, sizeof(resp));
3584         resp.events_reported = obj->events_reported;
3585
3586         uobj_put_destroy(uobj);
3587
3588         return uverbs_response(attrs, &resp, sizeof(resp));
3589 }
3590
3591 static int ib_uverbs_ex_query_device(struct uverbs_attr_bundle *attrs)
3592 {
3593         struct ib_uverbs_ex_query_device_resp resp = {};
3594         struct ib_uverbs_ex_query_device  cmd;
3595         struct ib_device_attr attr = {0};
3596         struct ib_ucontext *ucontext;
3597         struct ib_device *ib_dev;
3598         int err;
3599
3600         ucontext = ib_uverbs_get_ucontext(attrs);
3601         if (IS_ERR(ucontext))
3602                 return PTR_ERR(ucontext);
3603         ib_dev = ucontext->device;
3604
3605         err = uverbs_request(attrs, &cmd, sizeof(cmd));
3606         if (err)
3607                 return err;
3608
3609         if (cmd.comp_mask)
3610                 return -EINVAL;
3611
3612         if (cmd.reserved)
3613                 return -EINVAL;
3614
3615         err = ib_dev->ops.query_device(ib_dev, &attr, &attrs->driver_udata);
3616         if (err)
3617                 return err;
3618
3619         copy_query_dev_fields(ucontext, &resp.base, &attr);
3620
3621 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
3622         resp.odp_caps.general_caps = attr.odp_caps.general_caps;
3623         resp.odp_caps.per_transport_caps.rc_odp_caps =
3624                 attr.odp_caps.per_transport_caps.rc_odp_caps;
3625         resp.odp_caps.per_transport_caps.uc_odp_caps =
3626                 attr.odp_caps.per_transport_caps.uc_odp_caps;
3627         resp.odp_caps.per_transport_caps.ud_odp_caps =
3628                 attr.odp_caps.per_transport_caps.ud_odp_caps;
3629 #endif
3630
3631         resp.timestamp_mask = attr.timestamp_mask;
3632         resp.hca_core_clock = attr.hca_core_clock;
3633         resp.device_cap_flags_ex = attr.device_cap_flags;
3634         resp.rss_caps.supported_qpts = attr.rss_caps.supported_qpts;
3635         resp.rss_caps.max_rwq_indirection_tables =
3636                 attr.rss_caps.max_rwq_indirection_tables;
3637         resp.rss_caps.max_rwq_indirection_table_size =
3638                 attr.rss_caps.max_rwq_indirection_table_size;
3639         resp.max_wq_type_rq = attr.max_wq_type_rq;
3640         resp.raw_packet_caps = attr.raw_packet_caps;
3641         resp.tm_caps.max_rndv_hdr_size  = attr.tm_caps.max_rndv_hdr_size;
3642         resp.tm_caps.max_num_tags       = attr.tm_caps.max_num_tags;
3643         resp.tm_caps.max_ops            = attr.tm_caps.max_ops;
3644         resp.tm_caps.max_sge            = attr.tm_caps.max_sge;
3645         resp.tm_caps.flags              = attr.tm_caps.flags;
3646         resp.cq_moderation_caps.max_cq_moderation_count  =
3647                 attr.cq_caps.max_cq_moderation_count;
3648         resp.cq_moderation_caps.max_cq_moderation_period =
3649                 attr.cq_caps.max_cq_moderation_period;
3650         resp.max_dm_size = attr.max_dm_size;
3651         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
3652
3653         return uverbs_response(attrs, &resp, sizeof(resp));
3654 }
3655
3656 static int ib_uverbs_ex_modify_cq(struct uverbs_attr_bundle *attrs)
3657 {
3658         struct ib_uverbs_ex_modify_cq cmd;
3659         struct ib_cq *cq;
3660         int ret;
3661
3662         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3663         if (ret)
3664                 return ret;
3665
3666         if (!cmd.attr_mask || cmd.reserved)
3667                 return -EINVAL;
3668
3669         if (cmd.attr_mask > IB_CQ_MODERATE)
3670                 return -EOPNOTSUPP;
3671
3672         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
3673         if (!cq)
3674                 return -EINVAL;
3675
3676         ret = rdma_set_cq_moderation(cq, cmd.attr.cq_count, cmd.attr.cq_period);
3677
3678         uobj_put_obj_read(cq);
3679
3680         return ret;
3681 }
3682
3683 /*
3684  * Describe the input structs for write(). Some write methods have an input
3685  * only struct, most have an input and output. If the struct has an output then
3686  * the 'response' u64 must be the first field in the request structure.
3687  *
3688  * If udata is present then both the request and response structs have a
3689  * trailing driver_data flex array. In this case the size of the base struct
3690  * cannot be changed.
3691  */
3692 #define offsetof_after(_struct, _member)                                       \
3693         (offsetof(_struct, _member) + sizeof(((_struct *)NULL)->_member))
3694
3695 #define UAPI_DEF_WRITE_IO(req, resp)                                           \
3696         .write.has_resp = 1 +                                                  \
3697                           BUILD_BUG_ON_ZERO(offsetof(req, response) != 0) +    \
3698                           BUILD_BUG_ON_ZERO(sizeof(((req *)0)->response) !=    \
3699                                             sizeof(u64)),                      \
3700         .write.req_size = sizeof(req), .write.resp_size = sizeof(resp)
3701
3702 #define UAPI_DEF_WRITE_I(req) .write.req_size = sizeof(req)
3703
3704 #define UAPI_DEF_WRITE_UDATA_IO(req, resp)                                     \
3705         UAPI_DEF_WRITE_IO(req, resp),                                          \
3706                 .write.has_udata =                                             \
3707                         1 +                                                    \
3708                         BUILD_BUG_ON_ZERO(offsetof(req, driver_data) !=        \
3709                                           sizeof(req)) +                       \
3710                         BUILD_BUG_ON_ZERO(offsetof(resp, driver_data) !=       \
3711                                           sizeof(resp))
3712
3713 #define UAPI_DEF_WRITE_UDATA_I(req)                                            \
3714         UAPI_DEF_WRITE_I(req),                                                 \
3715                 .write.has_udata =                                             \
3716                         1 + BUILD_BUG_ON_ZERO(offsetof(req, driver_data) !=    \
3717                                               sizeof(req))
3718
3719 /*
3720  * The _EX versions are for use with WRITE_EX and allow the last struct member
3721  * to be specified. Buffers that do not include that member will be rejected.
3722  */
3723 #define UAPI_DEF_WRITE_IO_EX(req, req_last_member, resp, resp_last_member)     \
3724         .write.has_resp = 1,                                                   \
3725         .write.req_size = offsetof_after(req, req_last_member),                \
3726         .write.resp_size = offsetof_after(resp, resp_last_member)
3727
3728 #define UAPI_DEF_WRITE_I_EX(req, req_last_member)                              \
3729         .write.req_size = offsetof_after(req, req_last_member)
3730
3731 const struct uapi_definition uverbs_def_write_intf[] = {
3732         DECLARE_UVERBS_OBJECT(
3733                 UVERBS_OBJECT_AH,
3734                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_AH,
3735                                      ib_uverbs_create_ah,
3736                                      UAPI_DEF_WRITE_UDATA_IO(
3737                                              struct ib_uverbs_create_ah,
3738                                              struct ib_uverbs_create_ah_resp),
3739                                      UAPI_DEF_METHOD_NEEDS_FN(create_ah)),
3740                 DECLARE_UVERBS_WRITE(
3741                         IB_USER_VERBS_CMD_DESTROY_AH,
3742                         ib_uverbs_destroy_ah,
3743                         UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_ah),
3744                         UAPI_DEF_METHOD_NEEDS_FN(destroy_ah))),
3745
3746         DECLARE_UVERBS_OBJECT(
3747                 UVERBS_OBJECT_COMP_CHANNEL,
3748                 DECLARE_UVERBS_WRITE(
3749                         IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL,
3750                         ib_uverbs_create_comp_channel,
3751                         UAPI_DEF_WRITE_IO(
3752                                 struct ib_uverbs_create_comp_channel,
3753                                 struct ib_uverbs_create_comp_channel_resp))),
3754
3755         DECLARE_UVERBS_OBJECT(
3756                 UVERBS_OBJECT_CQ,
3757                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_CQ,
3758                                      ib_uverbs_create_cq,
3759                                      UAPI_DEF_WRITE_UDATA_IO(
3760                                              struct ib_uverbs_create_cq,
3761                                              struct ib_uverbs_create_cq_resp),
3762                                      UAPI_DEF_METHOD_NEEDS_FN(create_cq)),
3763                 DECLARE_UVERBS_WRITE(
3764                         IB_USER_VERBS_CMD_DESTROY_CQ,
3765                         ib_uverbs_destroy_cq,
3766                         UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_cq,
3767                                           struct ib_uverbs_destroy_cq_resp),
3768                         UAPI_DEF_METHOD_NEEDS_FN(destroy_cq)),
3769                 DECLARE_UVERBS_WRITE(
3770                         IB_USER_VERBS_CMD_POLL_CQ,
3771                         ib_uverbs_poll_cq,
3772                         UAPI_DEF_WRITE_IO(struct ib_uverbs_poll_cq,
3773                                           struct ib_uverbs_poll_cq_resp),
3774                         UAPI_DEF_METHOD_NEEDS_FN(poll_cq)),
3775                 DECLARE_UVERBS_WRITE(
3776                         IB_USER_VERBS_CMD_REQ_NOTIFY_CQ,
3777                         ib_uverbs_req_notify_cq,
3778                         UAPI_DEF_WRITE_I(struct ib_uverbs_req_notify_cq),
3779                         UAPI_DEF_METHOD_NEEDS_FN(req_notify_cq)),
3780                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_RESIZE_CQ,
3781                                      ib_uverbs_resize_cq,
3782                                      UAPI_DEF_WRITE_UDATA_IO(
3783                                              struct ib_uverbs_resize_cq,
3784                                              struct ib_uverbs_resize_cq_resp),
3785                                      UAPI_DEF_METHOD_NEEDS_FN(resize_cq)),
3786                 DECLARE_UVERBS_WRITE_EX(
3787                         IB_USER_VERBS_EX_CMD_CREATE_CQ,
3788                         ib_uverbs_ex_create_cq,
3789                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_cq,
3790                                              reserved,
3791                                              struct ib_uverbs_ex_create_cq_resp,
3792                                              response_length),
3793                         UAPI_DEF_METHOD_NEEDS_FN(create_cq)),
3794                 DECLARE_UVERBS_WRITE_EX(
3795                         IB_USER_VERBS_EX_CMD_MODIFY_CQ,
3796                         ib_uverbs_ex_modify_cq,
3797                         UAPI_DEF_WRITE_I(struct ib_uverbs_ex_modify_cq),
3798                         UAPI_DEF_METHOD_NEEDS_FN(create_cq))),
3799
3800         DECLARE_UVERBS_OBJECT(
3801                 UVERBS_OBJECT_DEVICE,
3802                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_GET_CONTEXT,
3803                                      ib_uverbs_get_context,
3804                                      UAPI_DEF_WRITE_UDATA_IO(
3805                                              struct ib_uverbs_get_context,
3806                                              struct ib_uverbs_get_context_resp)),
3807                 DECLARE_UVERBS_WRITE(
3808                         IB_USER_VERBS_CMD_QUERY_DEVICE,
3809                         ib_uverbs_query_device,
3810                         UAPI_DEF_WRITE_IO(struct ib_uverbs_query_device,
3811                                           struct ib_uverbs_query_device_resp)),
3812                 DECLARE_UVERBS_WRITE(
3813                         IB_USER_VERBS_CMD_QUERY_PORT,
3814                         ib_uverbs_query_port,
3815                         UAPI_DEF_WRITE_IO(struct ib_uverbs_query_port,
3816                                           struct ib_uverbs_query_port_resp),
3817                         UAPI_DEF_METHOD_NEEDS_FN(query_port)),
3818                 DECLARE_UVERBS_WRITE_EX(
3819                         IB_USER_VERBS_EX_CMD_QUERY_DEVICE,
3820                         ib_uverbs_ex_query_device,
3821                         UAPI_DEF_WRITE_IO_EX(
3822                                 struct ib_uverbs_ex_query_device,
3823                                 reserved,
3824                                 struct ib_uverbs_ex_query_device_resp,
3825                                 response_length),
3826                         UAPI_DEF_METHOD_NEEDS_FN(query_device)),
3827                 UAPI_DEF_OBJ_NEEDS_FN(alloc_ucontext),
3828                 UAPI_DEF_OBJ_NEEDS_FN(dealloc_ucontext)),
3829
3830         DECLARE_UVERBS_OBJECT(
3831                 UVERBS_OBJECT_FLOW,
3832                 DECLARE_UVERBS_WRITE_EX(
3833                         IB_USER_VERBS_EX_CMD_CREATE_FLOW,
3834                         ib_uverbs_ex_create_flow,
3835                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_create_flow,
3836                                              flow_attr,
3837                                              struct ib_uverbs_create_flow_resp,
3838                                              flow_handle),
3839                         UAPI_DEF_METHOD_NEEDS_FN(create_flow)),
3840                 DECLARE_UVERBS_WRITE_EX(
3841                         IB_USER_VERBS_EX_CMD_DESTROY_FLOW,
3842                         ib_uverbs_ex_destroy_flow,
3843                         UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_flow),
3844                         UAPI_DEF_METHOD_NEEDS_FN(destroy_flow))),
3845
3846         DECLARE_UVERBS_OBJECT(
3847                 UVERBS_OBJECT_MR,
3848                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_DEREG_MR,
3849                                      ib_uverbs_dereg_mr,
3850                                      UAPI_DEF_WRITE_I(struct ib_uverbs_dereg_mr),
3851                                      UAPI_DEF_METHOD_NEEDS_FN(dereg_mr)),
3852                 DECLARE_UVERBS_WRITE(
3853                         IB_USER_VERBS_CMD_REG_MR,
3854                         ib_uverbs_reg_mr,
3855                         UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_reg_mr,
3856                                                 struct ib_uverbs_reg_mr_resp),
3857                         UAPI_DEF_METHOD_NEEDS_FN(reg_user_mr)),
3858                 DECLARE_UVERBS_WRITE(
3859                         IB_USER_VERBS_CMD_REREG_MR,
3860                         ib_uverbs_rereg_mr,
3861                         UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_rereg_mr,
3862                                                 struct ib_uverbs_rereg_mr_resp),
3863                         UAPI_DEF_METHOD_NEEDS_FN(rereg_user_mr))),
3864
3865         DECLARE_UVERBS_OBJECT(
3866                 UVERBS_OBJECT_MW,
3867                 DECLARE_UVERBS_WRITE(
3868                         IB_USER_VERBS_CMD_ALLOC_MW,
3869                         ib_uverbs_alloc_mw,
3870                         UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_mw,
3871                                                 struct ib_uverbs_alloc_mw_resp),
3872                         UAPI_DEF_METHOD_NEEDS_FN(alloc_mw)),
3873                 DECLARE_UVERBS_WRITE(
3874                         IB_USER_VERBS_CMD_DEALLOC_MW,
3875                         ib_uverbs_dealloc_mw,
3876                         UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_mw),
3877                         UAPI_DEF_METHOD_NEEDS_FN(dealloc_mw))),
3878
3879         DECLARE_UVERBS_OBJECT(
3880                 UVERBS_OBJECT_PD,
3881                 DECLARE_UVERBS_WRITE(
3882                         IB_USER_VERBS_CMD_ALLOC_PD,
3883                         ib_uverbs_alloc_pd,
3884                         UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_pd,
3885                                                 struct ib_uverbs_alloc_pd_resp),
3886                         UAPI_DEF_METHOD_NEEDS_FN(alloc_pd)),
3887                 DECLARE_UVERBS_WRITE(
3888                         IB_USER_VERBS_CMD_DEALLOC_PD,
3889                         ib_uverbs_dealloc_pd,
3890                         UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_pd),
3891                         UAPI_DEF_METHOD_NEEDS_FN(dealloc_pd))),
3892
3893         DECLARE_UVERBS_OBJECT(
3894                 UVERBS_OBJECT_QP,
3895                 DECLARE_UVERBS_WRITE(
3896                         IB_USER_VERBS_CMD_ATTACH_MCAST,
3897                         ib_uverbs_attach_mcast,
3898                         UAPI_DEF_WRITE_I(struct ib_uverbs_attach_mcast),
3899                         UAPI_DEF_METHOD_NEEDS_FN(attach_mcast),
3900                         UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)),
3901                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_QP,
3902                                      ib_uverbs_create_qp,
3903                                      UAPI_DEF_WRITE_UDATA_IO(
3904                                              struct ib_uverbs_create_qp,
3905                                              struct ib_uverbs_create_qp_resp),
3906                                      UAPI_DEF_METHOD_NEEDS_FN(create_qp)),
3907                 DECLARE_UVERBS_WRITE(
3908                         IB_USER_VERBS_CMD_DESTROY_QP,
3909                         ib_uverbs_destroy_qp,
3910                         UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_qp,
3911                                           struct ib_uverbs_destroy_qp_resp),
3912                         UAPI_DEF_METHOD_NEEDS_FN(destroy_qp)),
3913                 DECLARE_UVERBS_WRITE(
3914                         IB_USER_VERBS_CMD_DETACH_MCAST,
3915                         ib_uverbs_detach_mcast,
3916                         UAPI_DEF_WRITE_I(struct ib_uverbs_detach_mcast),
3917                         UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)),
3918                 DECLARE_UVERBS_WRITE(
3919                         IB_USER_VERBS_CMD_MODIFY_QP,
3920                         ib_uverbs_modify_qp,
3921                         UAPI_DEF_WRITE_I(struct ib_uverbs_modify_qp),
3922                         UAPI_DEF_METHOD_NEEDS_FN(modify_qp)),
3923                 DECLARE_UVERBS_WRITE(
3924                         IB_USER_VERBS_CMD_POST_RECV,
3925                         ib_uverbs_post_recv,
3926                         UAPI_DEF_WRITE_IO(struct ib_uverbs_post_recv,
3927                                           struct ib_uverbs_post_recv_resp),
3928                         UAPI_DEF_METHOD_NEEDS_FN(post_recv)),
3929                 DECLARE_UVERBS_WRITE(
3930                         IB_USER_VERBS_CMD_POST_SEND,
3931                         ib_uverbs_post_send,
3932                         UAPI_DEF_WRITE_IO(struct ib_uverbs_post_send,
3933                                           struct ib_uverbs_post_send_resp),
3934                         UAPI_DEF_METHOD_NEEDS_FN(post_send)),
3935                 DECLARE_UVERBS_WRITE(
3936                         IB_USER_VERBS_CMD_QUERY_QP,
3937                         ib_uverbs_query_qp,
3938                         UAPI_DEF_WRITE_IO(struct ib_uverbs_query_qp,
3939                                           struct ib_uverbs_query_qp_resp),
3940                         UAPI_DEF_METHOD_NEEDS_FN(query_qp)),
3941                 DECLARE_UVERBS_WRITE_EX(
3942                         IB_USER_VERBS_EX_CMD_CREATE_QP,
3943                         ib_uverbs_ex_create_qp,
3944                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_qp,
3945                                              comp_mask,
3946                                              struct ib_uverbs_ex_create_qp_resp,
3947                                              response_length),
3948                         UAPI_DEF_METHOD_NEEDS_FN(create_qp)),
3949                 DECLARE_UVERBS_WRITE_EX(
3950                         IB_USER_VERBS_EX_CMD_MODIFY_QP,
3951                         ib_uverbs_ex_modify_qp,
3952                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_modify_qp,
3953                                              base,
3954                                              struct ib_uverbs_ex_modify_qp_resp,
3955                                              response_length),
3956                         UAPI_DEF_METHOD_NEEDS_FN(modify_qp))),
3957
3958         DECLARE_UVERBS_OBJECT(
3959                 UVERBS_OBJECT_RWQ_IND_TBL,
3960                 DECLARE_UVERBS_WRITE_EX(
3961                         IB_USER_VERBS_EX_CMD_CREATE_RWQ_IND_TBL,
3962                         ib_uverbs_ex_create_rwq_ind_table,
3963                         UAPI_DEF_WRITE_IO_EX(
3964                                 struct ib_uverbs_ex_create_rwq_ind_table,
3965                                 log_ind_tbl_size,
3966                                 struct ib_uverbs_ex_create_rwq_ind_table_resp,
3967                                 ind_tbl_num),
3968                         UAPI_DEF_METHOD_NEEDS_FN(create_rwq_ind_table)),
3969                 DECLARE_UVERBS_WRITE_EX(
3970                         IB_USER_VERBS_EX_CMD_DESTROY_RWQ_IND_TBL,
3971                         ib_uverbs_ex_destroy_rwq_ind_table,
3972                         UAPI_DEF_WRITE_I(
3973                                 struct ib_uverbs_ex_destroy_rwq_ind_table),
3974                         UAPI_DEF_METHOD_NEEDS_FN(destroy_rwq_ind_table))),
3975
3976         DECLARE_UVERBS_OBJECT(
3977                 UVERBS_OBJECT_WQ,
3978                 DECLARE_UVERBS_WRITE_EX(
3979                         IB_USER_VERBS_EX_CMD_CREATE_WQ,
3980                         ib_uverbs_ex_create_wq,
3981                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_wq,
3982                                              max_sge,
3983                                              struct ib_uverbs_ex_create_wq_resp,
3984                                              wqn),
3985                         UAPI_DEF_METHOD_NEEDS_FN(create_wq)),
3986                 DECLARE_UVERBS_WRITE_EX(
3987                         IB_USER_VERBS_EX_CMD_DESTROY_WQ,
3988                         ib_uverbs_ex_destroy_wq,
3989                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_destroy_wq,
3990                                              wq_handle,
3991                                              struct ib_uverbs_ex_destroy_wq_resp,
3992                                              reserved),
3993                         UAPI_DEF_METHOD_NEEDS_FN(destroy_wq)),
3994                 DECLARE_UVERBS_WRITE_EX(
3995                         IB_USER_VERBS_EX_CMD_MODIFY_WQ,
3996                         ib_uverbs_ex_modify_wq,
3997                         UAPI_DEF_WRITE_I_EX(struct ib_uverbs_ex_modify_wq,
3998                                             curr_wq_state),
3999                         UAPI_DEF_METHOD_NEEDS_FN(modify_wq))),
4000
4001         DECLARE_UVERBS_OBJECT(
4002                 UVERBS_OBJECT_SRQ,
4003                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_SRQ,
4004                                      ib_uverbs_create_srq,
4005                                      UAPI_DEF_WRITE_UDATA_IO(
4006                                              struct ib_uverbs_create_srq,
4007                                              struct ib_uverbs_create_srq_resp),
4008                                      UAPI_DEF_METHOD_NEEDS_FN(create_srq)),
4009                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_XSRQ,
4010                                      ib_uverbs_create_xsrq,
4011                                      UAPI_DEF_WRITE_UDATA_IO(
4012                                              struct ib_uverbs_create_xsrq,
4013                                              struct ib_uverbs_create_srq_resp),
4014                                      UAPI_DEF_METHOD_NEEDS_FN(create_srq)),
4015                 DECLARE_UVERBS_WRITE(
4016                         IB_USER_VERBS_CMD_DESTROY_SRQ,
4017                         ib_uverbs_destroy_srq,
4018                         UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_srq,
4019                                           struct ib_uverbs_destroy_srq_resp),
4020                         UAPI_DEF_METHOD_NEEDS_FN(destroy_srq)),
4021                 DECLARE_UVERBS_WRITE(
4022                         IB_USER_VERBS_CMD_MODIFY_SRQ,
4023                         ib_uverbs_modify_srq,
4024                         UAPI_DEF_WRITE_UDATA_I(struct ib_uverbs_modify_srq),
4025                         UAPI_DEF_METHOD_NEEDS_FN(modify_srq)),
4026                 DECLARE_UVERBS_WRITE(
4027                         IB_USER_VERBS_CMD_POST_SRQ_RECV,
4028                         ib_uverbs_post_srq_recv,
4029                         UAPI_DEF_WRITE_IO(struct ib_uverbs_post_srq_recv,
4030                                           struct ib_uverbs_post_srq_recv_resp),
4031                         UAPI_DEF_METHOD_NEEDS_FN(post_srq_recv)),
4032                 DECLARE_UVERBS_WRITE(
4033                         IB_USER_VERBS_CMD_QUERY_SRQ,
4034                         ib_uverbs_query_srq,
4035                         UAPI_DEF_WRITE_IO(struct ib_uverbs_query_srq,
4036                                           struct ib_uverbs_query_srq_resp),
4037                         UAPI_DEF_METHOD_NEEDS_FN(query_srq))),
4038
4039         DECLARE_UVERBS_OBJECT(
4040                 UVERBS_OBJECT_XRCD,
4041                 DECLARE_UVERBS_WRITE(
4042                         IB_USER_VERBS_CMD_CLOSE_XRCD,
4043                         ib_uverbs_close_xrcd,
4044                         UAPI_DEF_WRITE_I(struct ib_uverbs_close_xrcd),
4045                         UAPI_DEF_METHOD_NEEDS_FN(dealloc_xrcd)),
4046                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_QP,
4047                                      ib_uverbs_open_qp,
4048                                      UAPI_DEF_WRITE_UDATA_IO(
4049                                              struct ib_uverbs_open_qp,
4050                                              struct ib_uverbs_create_qp_resp)),
4051                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_XRCD,
4052                                      ib_uverbs_open_xrcd,
4053                                      UAPI_DEF_WRITE_UDATA_IO(
4054                                              struct ib_uverbs_open_xrcd,
4055                                              struct ib_uverbs_open_xrcd_resp),
4056                                      UAPI_DEF_METHOD_NEEDS_FN(alloc_xrcd))),
4057
4058         {},
4059 };