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 (void __force __user *)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 /*
 178  * When calling a destroy function during an error unwind we need to pass in
 179  * the udata that is sanitized of all user arguments. Ie from the driver
 180  * perspective it looks like no udata was passed.
 181  */
 182 struct ib_udata *uverbs_get_cleared_udata(struct uverbs_attr_bundle *attrs)
 183 {
 184         attrs->driver_udata = (struct ib_udata){};
 185         return &attrs->driver_udata;
 186 }
 187
 188 static struct ib_uverbs_completion_event_file *
 189 _ib_uverbs_lookup_comp_file(s32 fd, struct uverbs_attr_bundle *attrs)
 190 {
 191         struct ib_uobject *uobj = ufd_get_read(UVERBS_OBJECT_COMP_CHANNEL,
 192                                                fd, attrs);
 193
 194         if (IS_ERR(uobj))
 195                 return (void *)uobj;
 196
 197         uverbs_uobject_get(uobj);
 198         uobj_put_read(uobj);
 199
 200         return container_of(uobj, struct ib_uverbs_completion_event_file,
 201                             uobj);
 202 }
 203 #define ib_uverbs_lookup_comp_file(_fd, _ufile)                                \
 204         _ib_uverbs_lookup_comp_file((_fd)*typecheck(s32, _fd), _ufile)
 205
 206 int ib_alloc_ucontext(struct uverbs_attr_bundle *attrs)
 207 {
 208         struct ib_uverbs_file *ufile = attrs->ufile;
 209         struct ib_ucontext *ucontext;
 210         struct ib_device *ib_dev;
 211
 212         ib_dev = srcu_dereference(ufile->device->ib_dev,
 213                                   &ufile->device->disassociate_srcu);
 214         if (!ib_dev)
 215                 return -EIO;
 216
 217         ucontext = rdma_zalloc_drv_obj(ib_dev, ib_ucontext);
 218         if (!ucontext)
 219                 return -ENOMEM;
 220
 221         ucontext->device = ib_dev;
 222         ucontext->ufile = ufile;
 223         xa_init_flags(&ucontext->mmap_xa, XA_FLAGS_ALLOC);
 224
 225         rdma_restrack_new(&ucontext->res, RDMA_RESTRACK_CTX);
 226         rdma_restrack_set_name(&ucontext->res, NULL);
 227         attrs->context = ucontext;
 228         return 0;
 229 }
 230
 231 int ib_init_ucontext(struct uverbs_attr_bundle *attrs)
 232 {
 233         struct ib_ucontext *ucontext = attrs->context;
 234         struct ib_uverbs_file *file = attrs->ufile;
 235         int ret;
 236
 237         if (!down_read_trylock(&file->hw_destroy_rwsem))
 238                 return -EIO;
 239         mutex_lock(&file->ucontext_lock);
 240         if (file->ucontext) {
 241                 ret = -EINVAL;
 242                 goto err;
 243         }
 244
 245         ret = ib_rdmacg_try_charge(&ucontext->cg_obj, ucontext->device,
 246                                    RDMACG_RESOURCE_HCA_HANDLE);
 247         if (ret)
 248                 goto err;
 249
 250         ret = ucontext->device->ops.alloc_ucontext(ucontext,
 251                                                    &attrs->driver_udata);
 252         if (ret)
 253                 goto err_uncharge;
 254
 255         rdma_restrack_add(&ucontext->res);
 256
 257         /*
 258          * Make sure that ib_uverbs_get_ucontext() sees the pointer update
 259          * only after all writes to setup the ucontext have completed
 260          */
 261         smp_store_release(&file->ucontext, ucontext);
 262
 263         mutex_unlock(&file->ucontext_lock);
 264         up_read(&file->hw_destroy_rwsem);
 265         return 0;
 266
 267 err_uncharge:
 268         ib_rdmacg_uncharge(&ucontext->cg_obj, ucontext->device,
 269                            RDMACG_RESOURCE_HCA_HANDLE);
 270 err:
 271         mutex_unlock(&file->ucontext_lock);
 272         up_read(&file->hw_destroy_rwsem);
 273         return ret;
 274 }
 275
 276 static int ib_uverbs_get_context(struct uverbs_attr_bundle *attrs)
 277 {
 278         struct ib_uverbs_get_context_resp resp;
 279         struct ib_uverbs_get_context cmd;
 280         struct ib_device *ib_dev;
 281         struct ib_uobject *uobj;
 282         int ret;
 283
 284         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 285         if (ret)
 286                 return ret;
 287
 288         ret = ib_alloc_ucontext(attrs);
 289         if (ret)
 290                 return ret;
 291
 292         uobj = uobj_alloc(UVERBS_OBJECT_ASYNC_EVENT, attrs, &ib_dev);
 293         if (IS_ERR(uobj)) {
 294                 ret = PTR_ERR(uobj);
 295                 goto err_ucontext;
 296         }
 297
 298         resp = (struct ib_uverbs_get_context_resp){
 299                 .num_comp_vectors = attrs->ufile->device->num_comp_vectors,
 300                 .async_fd = uobj->id,
 301         };
 302         ret = uverbs_response(attrs, &resp, sizeof(resp));
 303         if (ret)
 304                 goto err_uobj;
 305
 306         ret = ib_init_ucontext(attrs);
 307         if (ret)
 308                 goto err_uobj;
 309
 310         ib_uverbs_init_async_event_file(
 311                 container_of(uobj, struct ib_uverbs_async_event_file, uobj));
 312         rdma_alloc_commit_uobject(uobj, attrs);
 313         return 0;
 314
 315 err_uobj:
 316         rdma_alloc_abort_uobject(uobj, attrs, false);
 317 err_ucontext:
 318         rdma_restrack_put(&attrs->context->res);
 319         kfree(attrs->context);
 320         attrs->context = NULL;
 321         return ret;
 322 }
 323
 324 static void copy_query_dev_fields(struct ib_ucontext *ucontext,
 325                                   struct ib_uverbs_query_device_resp *resp,
 326                                   struct ib_device_attr *attr)
 327 {
 328         struct ib_device *ib_dev = ucontext->device;
 329
 330         resp->fw_ver            = attr->fw_ver;
 331         resp->node_guid         = ib_dev->node_guid;
 332         resp->sys_image_guid    = attr->sys_image_guid;
 333         resp->max_mr_size       = attr->max_mr_size;
 334         resp->page_size_cap     = attr->page_size_cap;
 335         resp->vendor_id         = attr->vendor_id;
 336         resp->vendor_part_id    = attr->vendor_part_id;
 337         resp->hw_ver            = attr->hw_ver;
 338         resp->max_qp            = attr->max_qp;
 339         resp->max_qp_wr         = attr->max_qp_wr;
 340         resp->device_cap_flags  = lower_32_bits(attr->device_cap_flags);
 341         resp->max_sge           = min(attr->max_send_sge, attr->max_recv_sge);
 342         resp->max_sge_rd        = attr->max_sge_rd;
 343         resp->max_cq            = attr->max_cq;
 344         resp->max_cqe           = attr->max_cqe;
 345         resp->max_mr            = attr->max_mr;
 346         resp->max_pd            = attr->max_pd;
 347         resp->max_qp_rd_atom    = attr->max_qp_rd_atom;
 348         resp->max_ee_rd_atom    = attr->max_ee_rd_atom;
 349         resp->max_res_rd_atom   = attr->max_res_rd_atom;
 350         resp->max_qp_init_rd_atom       = attr->max_qp_init_rd_atom;
 351         resp->max_ee_init_rd_atom       = attr->max_ee_init_rd_atom;
 352         resp->atomic_cap                = attr->atomic_cap;
 353         resp->max_ee                    = attr->max_ee;
 354         resp->max_rdd                   = attr->max_rdd;
 355         resp->max_mw                    = attr->max_mw;
 356         resp->max_raw_ipv6_qp           = attr->max_raw_ipv6_qp;
 357         resp->max_raw_ethy_qp           = attr->max_raw_ethy_qp;
 358         resp->max_mcast_grp             = attr->max_mcast_grp;
 359         resp->max_mcast_qp_attach       = attr->max_mcast_qp_attach;
 360         resp->max_total_mcast_qp_attach = attr->max_total_mcast_qp_attach;
 361         resp->max_ah                    = attr->max_ah;
 362         resp->max_srq                   = attr->max_srq;
 363         resp->max_srq_wr                = attr->max_srq_wr;
 364         resp->max_srq_sge               = attr->max_srq_sge;
 365         resp->max_pkeys                 = attr->max_pkeys;
 366         resp->local_ca_ack_delay        = attr->local_ca_ack_delay;
 367         resp->phys_port_cnt = min_t(u32, ib_dev->phys_port_cnt, U8_MAX);
 368 }
 369
 370 static int ib_uverbs_query_device(struct uverbs_attr_bundle *attrs)
 371 {
 372         struct ib_uverbs_query_device      cmd;
 373         struct ib_uverbs_query_device_resp resp;
 374         struct ib_ucontext *ucontext;
 375         int ret;
 376
 377         ucontext = ib_uverbs_get_ucontext(attrs);
 378         if (IS_ERR(ucontext))
 379                 return PTR_ERR(ucontext);
 380
 381         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 382         if (ret)
 383                 return ret;
 384
 385         memset(&resp, 0, sizeof resp);
 386         copy_query_dev_fields(ucontext, &resp, &ucontext->device->attrs);
 387
 388         return uverbs_response(attrs, &resp, sizeof(resp));
 389 }
 390
 391 static int ib_uverbs_query_port(struct uverbs_attr_bundle *attrs)
 392 {
 393         struct ib_uverbs_query_port      cmd;
 394         struct ib_uverbs_query_port_resp resp;
 395         struct ib_port_attr              attr;
 396         int                              ret;
 397         struct ib_ucontext *ucontext;
 398         struct ib_device *ib_dev;
 399
 400         ucontext = ib_uverbs_get_ucontext(attrs);
 401         if (IS_ERR(ucontext))
 402                 return PTR_ERR(ucontext);
 403         ib_dev = ucontext->device;
 404
 405         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 406         if (ret)
 407                 return ret;
 408
 409         ret = ib_query_port(ib_dev, cmd.port_num, &attr);
 410         if (ret)
 411                 return ret;
 412
 413         memset(&resp, 0, sizeof resp);
 414         copy_port_attr_to_resp(&attr, &resp, ib_dev, cmd.port_num);
 415
 416         return uverbs_response(attrs, &resp, sizeof(resp));
 417 }
 418
 419 static int ib_uverbs_alloc_pd(struct uverbs_attr_bundle *attrs)
 420 {
 421         struct ib_uverbs_alloc_pd_resp resp = {};
 422         struct ib_uverbs_alloc_pd      cmd;
 423         struct ib_uobject             *uobj;
 424         struct ib_pd                  *pd;
 425         int                            ret;
 426         struct ib_device *ib_dev;
 427
 428         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 429         if (ret)
 430                 return ret;
 431
 432         uobj = uobj_alloc(UVERBS_OBJECT_PD, attrs, &ib_dev);
 433         if (IS_ERR(uobj))
 434                 return PTR_ERR(uobj);
 435
 436         pd = rdma_zalloc_drv_obj(ib_dev, ib_pd);
 437         if (!pd) {
 438                 ret = -ENOMEM;
 439                 goto err;
 440         }
 441
 442         pd->device  = ib_dev;
 443         pd->uobject = uobj;
 444         atomic_set(&pd->usecnt, 0);
 445
 446         rdma_restrack_new(&pd->res, RDMA_RESTRACK_PD);
 447         rdma_restrack_set_name(&pd->res, NULL);
 448
 449         ret = ib_dev->ops.alloc_pd(pd, &attrs->driver_udata);
 450         if (ret)
 451                 goto err_alloc;
 452         rdma_restrack_add(&pd->res);
 453
 454         uobj->object = pd;
 455         uobj_finalize_uobj_create(uobj, attrs);
 456
 457         resp.pd_handle = uobj->id;
 458         return uverbs_response(attrs, &resp, sizeof(resp));
 459
 460 err_alloc:
 461         rdma_restrack_put(&pd->res);
 462         kfree(pd);
 463 err:
 464         uobj_alloc_abort(uobj, attrs);
 465         return ret;
 466 }
 467
 468 static int ib_uverbs_dealloc_pd(struct uverbs_attr_bundle *attrs)
 469 {
 470         struct ib_uverbs_dealloc_pd cmd;
 471         int ret;
 472
 473         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 474         if (ret)
 475                 return ret;
 476
 477         return uobj_perform_destroy(UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
 478 }
 479
 480 struct xrcd_table_entry {
 481         struct rb_node  node;
 482         struct ib_xrcd *xrcd;
 483         struct inode   *inode;
 484 };
 485
 486 static int xrcd_table_insert(struct ib_uverbs_device *dev,
 487                             struct inode *inode,
 488                             struct ib_xrcd *xrcd)
 489 {
 490         struct xrcd_table_entry *entry, *scan;
 491         struct rb_node **p = &dev->xrcd_tree.rb_node;
 492         struct rb_node *parent = NULL;
 493
 494         entry = kmalloc(sizeof *entry, GFP_KERNEL);
 495         if (!entry)
 496                 return -ENOMEM;
 497
 498         entry->xrcd  = xrcd;
 499         entry->inode = inode;
 500
 501         while (*p) {
 502                 parent = *p;
 503                 scan = rb_entry(parent, struct xrcd_table_entry, node);
 504
 505                 if (inode < scan->inode) {
 506                         p = &(*p)->rb_left;
 507                 } else if (inode > scan->inode) {
 508                         p = &(*p)->rb_right;
 509                 } else {
 510                         kfree(entry);
 511                         return -EEXIST;
 512                 }
 513         }
 514
 515         rb_link_node(&entry->node, parent, p);
 516         rb_insert_color(&entry->node, &dev->xrcd_tree);
 517         igrab(inode);
 518         return 0;
 519 }
 520
 521 static struct xrcd_table_entry *xrcd_table_search(struct ib_uverbs_device *dev,
 522                                                   struct inode *inode)
 523 {
 524         struct xrcd_table_entry *entry;
 525         struct rb_node *p = dev->xrcd_tree.rb_node;
 526
 527         while (p) {
 528                 entry = rb_entry(p, struct xrcd_table_entry, node);
 529
 530                 if (inode < entry->inode)
 531                         p = p->rb_left;
 532                 else if (inode > entry->inode)
 533                         p = p->rb_right;
 534                 else
 535                         return entry;
 536         }
 537
 538         return NULL;
 539 }
 540
 541 static struct ib_xrcd *find_xrcd(struct ib_uverbs_device *dev, struct inode *inode)
 542 {
 543         struct xrcd_table_entry *entry;
 544
 545         entry = xrcd_table_search(dev, inode);
 546         if (!entry)
 547                 return NULL;
 548
 549         return entry->xrcd;
 550 }
 551
 552 static void xrcd_table_delete(struct ib_uverbs_device *dev,
 553                               struct inode *inode)
 554 {
 555         struct xrcd_table_entry *entry;
 556
 557         entry = xrcd_table_search(dev, inode);
 558         if (entry) {
 559                 iput(inode);
 560                 rb_erase(&entry->node, &dev->xrcd_tree);
 561                 kfree(entry);
 562         }
 563 }
 564
 565 static int ib_uverbs_open_xrcd(struct uverbs_attr_bundle *attrs)
 566 {
 567         struct ib_uverbs_device *ibudev = attrs->ufile->device;
 568         struct ib_uverbs_open_xrcd_resp resp = {};
 569         struct ib_uverbs_open_xrcd      cmd;
 570         struct ib_uxrcd_object         *obj;
 571         struct ib_xrcd                 *xrcd = NULL;
 572         struct inode                   *inode = NULL;
 573         int                             new_xrcd = 0;
 574         struct ib_device *ib_dev;
 575         struct fd f = {};
 576         int ret;
 577
 578         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 579         if (ret)
 580                 return ret;
 581
 582         mutex_lock(&ibudev->xrcd_tree_mutex);
 583
 584         if (cmd.fd != -1) {
 585                 /* search for file descriptor */
 586                 f = fdget(cmd.fd);
 587                 if (!f.file) {
 588                         ret = -EBADF;
 589                         goto err_tree_mutex_unlock;
 590                 }
 591
 592                 inode = file_inode(f.file);
 593                 xrcd = find_xrcd(ibudev, inode);
 594                 if (!xrcd && !(cmd.oflags & O_CREAT)) {
 595                         /* no file descriptor. Need CREATE flag */
 596                         ret = -EAGAIN;
 597                         goto err_tree_mutex_unlock;
 598                 }
 599
 600                 if (xrcd && cmd.oflags & O_EXCL) {
 601                         ret = -EINVAL;
 602                         goto err_tree_mutex_unlock;
 603                 }
 604         }
 605
 606         obj = (struct ib_uxrcd_object *)uobj_alloc(UVERBS_OBJECT_XRCD, attrs,
 607                                                    &ib_dev);
 608         if (IS_ERR(obj)) {
 609                 ret = PTR_ERR(obj);
 610                 goto err_tree_mutex_unlock;
 611         }
 612
 613         if (!xrcd) {
 614                 xrcd = ib_alloc_xrcd_user(ib_dev, inode, &attrs->driver_udata);
 615                 if (IS_ERR(xrcd)) {
 616                         ret = PTR_ERR(xrcd);
 617                         goto err;
 618                 }
 619                 new_xrcd = 1;
 620         }
 621
 622         atomic_set(&obj->refcnt, 0);
 623         obj->uobject.object = xrcd;
 624
 625         if (inode) {
 626                 if (new_xrcd) {
 627                         /* create new inode/xrcd table entry */
 628                         ret = xrcd_table_insert(ibudev, inode, xrcd);
 629                         if (ret)
 630                                 goto err_dealloc_xrcd;
 631                 }
 632                 atomic_inc(&xrcd->usecnt);
 633         }
 634
 635         if (f.file)
 636                 fdput(f);
 637
 638         mutex_unlock(&ibudev->xrcd_tree_mutex);
 639         uobj_finalize_uobj_create(&obj->uobject, attrs);
 640
 641         resp.xrcd_handle = obj->uobject.id;
 642         return uverbs_response(attrs, &resp, sizeof(resp));
 643
 644 err_dealloc_xrcd:
 645         ib_dealloc_xrcd_user(xrcd, uverbs_get_cleared_udata(attrs));
 646
 647 err:
 648         uobj_alloc_abort(&obj->uobject, attrs);
 649
 650 err_tree_mutex_unlock:
 651         if (f.file)
 652                 fdput(f);
 653
 654         mutex_unlock(&ibudev->xrcd_tree_mutex);
 655
 656         return ret;
 657 }
 658
 659 static int ib_uverbs_close_xrcd(struct uverbs_attr_bundle *attrs)
 660 {
 661         struct ib_uverbs_close_xrcd cmd;
 662         int ret;
 663
 664         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 665         if (ret)
 666                 return ret;
 667
 668         return uobj_perform_destroy(UVERBS_OBJECT_XRCD, cmd.xrcd_handle, attrs);
 669 }
 670
 671 int ib_uverbs_dealloc_xrcd(struct ib_uobject *uobject, struct ib_xrcd *xrcd,
 672                            enum rdma_remove_reason why,
 673                            struct uverbs_attr_bundle *attrs)
 674 {
 675         struct inode *inode;
 676         int ret;
 677         struct ib_uverbs_device *dev = attrs->ufile->device;
 678
 679         inode = xrcd->inode;
 680         if (inode && !atomic_dec_and_test(&xrcd->usecnt))
 681                 return 0;
 682
 683         ret = ib_dealloc_xrcd_user(xrcd, &attrs->driver_udata);
 684         if (ret) {
 685                 atomic_inc(&xrcd->usecnt);
 686                 return ret;
 687         }
 688
 689         if (inode)
 690                 xrcd_table_delete(dev, inode);
 691
 692         return 0;
 693 }
 694
 695 static int ib_uverbs_reg_mr(struct uverbs_attr_bundle *attrs)
 696 {
 697         struct ib_uverbs_reg_mr_resp resp = {};
 698         struct ib_uverbs_reg_mr      cmd;
 699         struct ib_uobject           *uobj;
 700         struct ib_pd                *pd;
 701         struct ib_mr                *mr;
 702         int                          ret;
 703         struct ib_device *ib_dev;
 704
 705         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 706         if (ret)
 707                 return ret;
 708
 709         if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
 710                 return -EINVAL;
 711
 712         uobj = uobj_alloc(UVERBS_OBJECT_MR, attrs, &ib_dev);
 713         if (IS_ERR(uobj))
 714                 return PTR_ERR(uobj);
 715
 716         ret = ib_check_mr_access(ib_dev, cmd.access_flags);
 717         if (ret)
 718                 goto err_free;
 719
 720         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
 721         if (!pd) {
 722                 ret = -EINVAL;
 723                 goto err_free;
 724         }
 725
 726         mr = pd->device->ops.reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
 727                                          cmd.access_flags,
 728                                          &attrs->driver_udata);
 729         if (IS_ERR(mr)) {
 730                 ret = PTR_ERR(mr);
 731                 goto err_put;
 732         }
 733
 734         mr->device  = pd->device;
 735         mr->pd      = pd;
 736         mr->type    = IB_MR_TYPE_USER;
 737         mr->dm      = NULL;
 738         mr->sig_attrs = NULL;
 739         mr->uobject = uobj;
 740         atomic_inc(&pd->usecnt);
 741         mr->iova = cmd.hca_va;
 742         mr->length = cmd.length;
 743
 744         rdma_restrack_new(&mr->res, RDMA_RESTRACK_MR);
 745         rdma_restrack_set_name(&mr->res, NULL);
 746         rdma_restrack_add(&mr->res);
 747
 748         uobj->object = mr;
 749         uobj_put_obj_read(pd);
 750         uobj_finalize_uobj_create(uobj, attrs);
 751
 752         resp.lkey = mr->lkey;
 753         resp.rkey = mr->rkey;
 754         resp.mr_handle = uobj->id;
 755         return uverbs_response(attrs, &resp, sizeof(resp));
 756
 757 err_put:
 758         uobj_put_obj_read(pd);
 759 err_free:
 760         uobj_alloc_abort(uobj, attrs);
 761         return ret;
 762 }
 763
 764 static int ib_uverbs_rereg_mr(struct uverbs_attr_bundle *attrs)
 765 {
 766         struct ib_uverbs_rereg_mr      cmd;
 767         struct ib_uverbs_rereg_mr_resp resp;
 768         struct ib_mr                *mr;
 769         int                          ret;
 770         struct ib_uobject           *uobj;
 771         struct ib_uobject *new_uobj;
 772         struct ib_device *ib_dev;
 773         struct ib_pd *orig_pd;
 774         struct ib_pd *new_pd;
 775         struct ib_mr *new_mr;
 776
 777         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 778         if (ret)
 779                 return ret;
 780
 781         if (!cmd.flags)
 782                 return -EINVAL;
 783
 784         if (cmd.flags & ~IB_MR_REREG_SUPPORTED)
 785                 return -EOPNOTSUPP;
 786
 787         if ((cmd.flags & IB_MR_REREG_TRANS) &&
 788             (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
 789                 return -EINVAL;
 790
 791         uobj = uobj_get_write(UVERBS_OBJECT_MR, cmd.mr_handle, attrs);
 792         if (IS_ERR(uobj))
 793                 return PTR_ERR(uobj);
 794
 795         mr = uobj->object;
 796
 797         if (mr->dm) {
 798                 ret = -EINVAL;
 799                 goto put_uobjs;
 800         }
 801
 802         if (cmd.flags & IB_MR_REREG_ACCESS) {
 803                 ret = ib_check_mr_access(mr->device, cmd.access_flags);
 804                 if (ret)
 805                         goto put_uobjs;
 806         }
 807
 808         orig_pd = mr->pd;
 809         if (cmd.flags & IB_MR_REREG_PD) {
 810                 new_pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle,
 811                                            attrs);
 812                 if (!new_pd) {
 813                         ret = -EINVAL;
 814                         goto put_uobjs;
 815                 }
 816         } else {
 817                 new_pd = mr->pd;
 818         }
 819
 820         /*
 821          * The driver might create a new HW object as part of the rereg, we need
 822          * to have a uobject ready to hold it.
 823          */
 824         new_uobj = uobj_alloc(UVERBS_OBJECT_MR, attrs, &ib_dev);
 825         if (IS_ERR(new_uobj)) {
 826                 ret = PTR_ERR(new_uobj);
 827                 goto put_uobj_pd;
 828         }
 829
 830         new_mr = ib_dev->ops.rereg_user_mr(mr, cmd.flags, cmd.start, cmd.length,
 831                                            cmd.hca_va, cmd.access_flags, new_pd,
 832                                            &attrs->driver_udata);
 833         if (IS_ERR(new_mr)) {
 834                 ret = PTR_ERR(new_mr);
 835                 goto put_new_uobj;
 836         }
 837         if (new_mr) {
 838                 new_mr->device = new_pd->device;
 839                 new_mr->pd = new_pd;
 840                 new_mr->type = IB_MR_TYPE_USER;
 841                 new_mr->uobject = uobj;
 842                 atomic_inc(&new_pd->usecnt);
 843                 new_uobj->object = new_mr;
 844
 845                 rdma_restrack_new(&new_mr->res, RDMA_RESTRACK_MR);
 846                 rdma_restrack_set_name(&new_mr->res, NULL);
 847                 rdma_restrack_add(&new_mr->res);
 848
 849                 /*
 850                  * The new uobj for the new HW object is put into the same spot
 851                  * in the IDR and the old uobj & HW object is deleted.
 852                  */
 853                 rdma_assign_uobject(uobj, new_uobj, attrs);
 854                 rdma_alloc_commit_uobject(new_uobj, attrs);
 855                 uobj_put_destroy(uobj);
 856                 new_uobj = NULL;
 857                 uobj = NULL;
 858                 mr = new_mr;
 859         } else {
 860                 if (cmd.flags & IB_MR_REREG_PD) {
 861                         atomic_dec(&orig_pd->usecnt);
 862                         mr->pd = new_pd;
 863                         atomic_inc(&new_pd->usecnt);
 864                 }
 865                 if (cmd.flags & IB_MR_REREG_TRANS) {
 866                         mr->iova = cmd.hca_va;
 867                         mr->length = cmd.length;
 868                 }
 869         }
 870
 871         memset(&resp, 0, sizeof(resp));
 872         resp.lkey      = mr->lkey;
 873         resp.rkey      = mr->rkey;
 874
 875         ret = uverbs_response(attrs, &resp, sizeof(resp));
 876
 877 put_new_uobj:
 878         if (new_uobj)
 879                 uobj_alloc_abort(new_uobj, attrs);
 880 put_uobj_pd:
 881         if (cmd.flags & IB_MR_REREG_PD)
 882                 uobj_put_obj_read(new_pd);
 883
 884 put_uobjs:
 885         if (uobj)
 886                 uobj_put_write(uobj);
 887
 888         return ret;
 889 }
 890
 891 static int ib_uverbs_dereg_mr(struct uverbs_attr_bundle *attrs)
 892 {
 893         struct ib_uverbs_dereg_mr cmd;
 894         int ret;
 895
 896         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 897         if (ret)
 898                 return ret;
 899
 900         return uobj_perform_destroy(UVERBS_OBJECT_MR, cmd.mr_handle, attrs);
 901 }
 902
 903 static int ib_uverbs_alloc_mw(struct uverbs_attr_bundle *attrs)
 904 {
 905         struct ib_uverbs_alloc_mw      cmd;
 906         struct ib_uverbs_alloc_mw_resp resp = {};
 907         struct ib_uobject             *uobj;
 908         struct ib_pd                  *pd;
 909         struct ib_mw                  *mw;
 910         int                            ret;
 911         struct ib_device *ib_dev;
 912
 913         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 914         if (ret)
 915                 return ret;
 916
 917         uobj = uobj_alloc(UVERBS_OBJECT_MW, attrs, &ib_dev);
 918         if (IS_ERR(uobj))
 919                 return PTR_ERR(uobj);
 920
 921         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
 922         if (!pd) {
 923                 ret = -EINVAL;
 924                 goto err_free;
 925         }
 926
 927         if (cmd.mw_type != IB_MW_TYPE_1 && cmd.mw_type != IB_MW_TYPE_2) {
 928                 ret = -EINVAL;
 929                 goto err_put;
 930         }
 931
 932         mw = rdma_zalloc_drv_obj(ib_dev, ib_mw);
 933         if (!mw) {
 934                 ret = -ENOMEM;
 935                 goto err_put;
 936         }
 937
 938         mw->device = ib_dev;
 939         mw->pd = pd;
 940         mw->uobject = uobj;
 941         mw->type = cmd.mw_type;
 942
 943         ret = pd->device->ops.alloc_mw(mw, &attrs->driver_udata);
 944         if (ret)
 945                 goto err_alloc;
 946
 947         atomic_inc(&pd->usecnt);
 948
 949         uobj->object = mw;
 950         uobj_put_obj_read(pd);
 951         uobj_finalize_uobj_create(uobj, attrs);
 952
 953         resp.rkey = mw->rkey;
 954         resp.mw_handle = uobj->id;
 955         return uverbs_response(attrs, &resp, sizeof(resp));
 956
 957 err_alloc:
 958         kfree(mw);
 959 err_put:
 960         uobj_put_obj_read(pd);
 961 err_free:
 962         uobj_alloc_abort(uobj, attrs);
 963         return ret;
 964 }
 965
 966 static int ib_uverbs_dealloc_mw(struct uverbs_attr_bundle *attrs)
 967 {
 968         struct ib_uverbs_dealloc_mw cmd;
 969         int ret;
 970
 971         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 972         if (ret)
 973                 return ret;
 974
 975         return uobj_perform_destroy(UVERBS_OBJECT_MW, cmd.mw_handle, attrs);
 976 }
 977
 978 static int ib_uverbs_create_comp_channel(struct uverbs_attr_bundle *attrs)
 979 {
 980         struct ib_uverbs_create_comp_channel       cmd;
 981         struct ib_uverbs_create_comp_channel_resp  resp;
 982         struct ib_uobject                         *uobj;
 983         struct ib_uverbs_completion_event_file    *ev_file;
 984         struct ib_device *ib_dev;
 985         int ret;
 986
 987         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 988         if (ret)
 989                 return ret;
 990
 991         uobj = uobj_alloc(UVERBS_OBJECT_COMP_CHANNEL, attrs, &ib_dev);
 992         if (IS_ERR(uobj))
 993                 return PTR_ERR(uobj);
 994
 995         ev_file = container_of(uobj, struct ib_uverbs_completion_event_file,
 996                                uobj);
 997         ib_uverbs_init_event_queue(&ev_file->ev_queue);
 998         uobj_finalize_uobj_create(uobj, attrs);
 999
1000         resp.fd = uobj->id;
1001         return uverbs_response(attrs, &resp, sizeof(resp));
1002 }
1003
1004 static int create_cq(struct uverbs_attr_bundle *attrs,
1005                      struct ib_uverbs_ex_create_cq *cmd)
1006 {
1007         struct ib_ucq_object           *obj;
1008         struct ib_uverbs_completion_event_file    *ev_file = NULL;
1009         struct ib_cq                   *cq;
1010         int                             ret;
1011         struct ib_uverbs_ex_create_cq_resp resp = {};
1012         struct ib_cq_init_attr attr = {};
1013         struct ib_device *ib_dev;
1014
1015         if (cmd->comp_vector >= attrs->ufile->device->num_comp_vectors)
1016                 return -EINVAL;
1017
1018         obj = (struct ib_ucq_object *)uobj_alloc(UVERBS_OBJECT_CQ, attrs,
1019                                                  &ib_dev);
1020         if (IS_ERR(obj))
1021                 return PTR_ERR(obj);
1022
1023         if (cmd->comp_channel >= 0) {
1024                 ev_file = ib_uverbs_lookup_comp_file(cmd->comp_channel, attrs);
1025                 if (IS_ERR(ev_file)) {
1026                         ret = PTR_ERR(ev_file);
1027                         goto err;
1028                 }
1029         }
1030
1031         obj->uevent.uobject.user_handle = cmd->user_handle;
1032         INIT_LIST_HEAD(&obj->comp_list);
1033         INIT_LIST_HEAD(&obj->uevent.event_list);
1034
1035         attr.cqe = cmd->cqe;
1036         attr.comp_vector = cmd->comp_vector;
1037         attr.flags = cmd->flags;
1038
1039         cq = rdma_zalloc_drv_obj(ib_dev, ib_cq);
1040         if (!cq) {
1041                 ret = -ENOMEM;
1042                 goto err_file;
1043         }
1044         cq->device        = ib_dev;
1045         cq->uobject       = obj;
1046         cq->comp_handler  = ib_uverbs_comp_handler;
1047         cq->event_handler = ib_uverbs_cq_event_handler;
1048         cq->cq_context    = ev_file ? &ev_file->ev_queue : NULL;
1049         atomic_set(&cq->usecnt, 0);
1050
1051         rdma_restrack_new(&cq->res, RDMA_RESTRACK_CQ);
1052         rdma_restrack_set_name(&cq->res, NULL);
1053
1054         ret = ib_dev->ops.create_cq(cq, &attr, &attrs->driver_udata);
1055         if (ret)
1056                 goto err_free;
1057         rdma_restrack_add(&cq->res);
1058
1059         obj->uevent.uobject.object = cq;
1060         obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file);
1061         if (obj->uevent.event_file)
1062                 uverbs_uobject_get(&obj->uevent.event_file->uobj);
1063         uobj_finalize_uobj_create(&obj->uevent.uobject, attrs);
1064
1065         resp.base.cq_handle = obj->uevent.uobject.id;
1066         resp.base.cqe = cq->cqe;
1067         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
1068         return uverbs_response(attrs, &resp, sizeof(resp));
1069
1070 err_free:
1071         rdma_restrack_put(&cq->res);
1072         kfree(cq);
1073 err_file:
1074         if (ev_file)
1075                 ib_uverbs_release_ucq(ev_file, obj);
1076 err:
1077         uobj_alloc_abort(&obj->uevent.uobject, attrs);
1078         return ret;
1079 }
1080
1081 static int ib_uverbs_create_cq(struct uverbs_attr_bundle *attrs)
1082 {
1083         struct ib_uverbs_create_cq      cmd;
1084         struct ib_uverbs_ex_create_cq   cmd_ex;
1085         int ret;
1086
1087         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1088         if (ret)
1089                 return ret;
1090
1091         memset(&cmd_ex, 0, sizeof(cmd_ex));
1092         cmd_ex.user_handle = cmd.user_handle;
1093         cmd_ex.cqe = cmd.cqe;
1094         cmd_ex.comp_vector = cmd.comp_vector;
1095         cmd_ex.comp_channel = cmd.comp_channel;
1096
1097         return create_cq(attrs, &cmd_ex);
1098 }
1099
1100 static int ib_uverbs_ex_create_cq(struct uverbs_attr_bundle *attrs)
1101 {
1102         struct ib_uverbs_ex_create_cq  cmd;
1103         int ret;
1104
1105         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1106         if (ret)
1107                 return ret;
1108
1109         if (cmd.comp_mask)
1110                 return -EINVAL;
1111
1112         if (cmd.reserved)
1113                 return -EINVAL;
1114
1115         return create_cq(attrs, &cmd);
1116 }
1117
1118 static int ib_uverbs_resize_cq(struct uverbs_attr_bundle *attrs)
1119 {
1120         struct ib_uverbs_resize_cq      cmd;
1121         struct ib_uverbs_resize_cq_resp resp = {};
1122         struct ib_cq                    *cq;
1123         int ret;
1124
1125         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1126         if (ret)
1127                 return ret;
1128
1129         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
1130         if (!cq)
1131                 return -EINVAL;
1132
1133         ret = cq->device->ops.resize_cq(cq, cmd.cqe, &attrs->driver_udata);
1134         if (ret)
1135                 goto out;
1136
1137         resp.cqe = cq->cqe;
1138
1139         ret = uverbs_response(attrs, &resp, sizeof(resp));
1140 out:
1141         rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
1142                                 UVERBS_LOOKUP_READ);
1143
1144         return ret;
1145 }
1146
1147 static int copy_wc_to_user(struct ib_device *ib_dev, void __user *dest,
1148                            struct ib_wc *wc)
1149 {
1150         struct ib_uverbs_wc tmp;
1151
1152         tmp.wr_id               = wc->wr_id;
1153         tmp.status              = wc->status;
1154         tmp.opcode              = wc->opcode;
1155         tmp.vendor_err          = wc->vendor_err;
1156         tmp.byte_len            = wc->byte_len;
1157         tmp.ex.imm_data         = wc->ex.imm_data;
1158         tmp.qp_num              = wc->qp->qp_num;
1159         tmp.src_qp              = wc->src_qp;
1160         tmp.wc_flags            = wc->wc_flags;
1161         tmp.pkey_index          = wc->pkey_index;
1162         if (rdma_cap_opa_ah(ib_dev, wc->port_num))
1163                 tmp.slid        = OPA_TO_IB_UCAST_LID(wc->slid);
1164         else
1165                 tmp.slid        = ib_lid_cpu16(wc->slid);
1166         tmp.sl                  = wc->sl;
1167         tmp.dlid_path_bits      = wc->dlid_path_bits;
1168         tmp.port_num            = wc->port_num;
1169         tmp.reserved            = 0;
1170
1171         if (copy_to_user(dest, &tmp, sizeof tmp))
1172                 return -EFAULT;
1173
1174         return 0;
1175 }
1176
1177 static int ib_uverbs_poll_cq(struct uverbs_attr_bundle *attrs)
1178 {
1179         struct ib_uverbs_poll_cq       cmd;
1180         struct ib_uverbs_poll_cq_resp  resp;
1181         u8 __user                     *header_ptr;
1182         u8 __user                     *data_ptr;
1183         struct ib_cq                  *cq;
1184         struct ib_wc                   wc;
1185         int                            ret;
1186
1187         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1188         if (ret)
1189                 return ret;
1190
1191         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
1192         if (!cq)
1193                 return -EINVAL;
1194
1195         /* we copy a struct ib_uverbs_poll_cq_resp to user space */
1196         header_ptr = attrs->ucore.outbuf;
1197         data_ptr = header_ptr + sizeof resp;
1198
1199         memset(&resp, 0, sizeof resp);
1200         while (resp.count < cmd.ne) {
1201                 ret = ib_poll_cq(cq, 1, &wc);
1202                 if (ret < 0)
1203                         goto out_put;
1204                 if (!ret)
1205                         break;
1206
1207                 ret = copy_wc_to_user(cq->device, data_ptr, &wc);
1208                 if (ret)
1209                         goto out_put;
1210
1211                 data_ptr += sizeof(struct ib_uverbs_wc);
1212                 ++resp.count;
1213         }
1214
1215         if (copy_to_user(header_ptr, &resp, sizeof resp)) {
1216                 ret = -EFAULT;
1217                 goto out_put;
1218         }
1219         ret = 0;
1220
1221         if (uverbs_attr_is_valid(attrs, UVERBS_ATTR_CORE_OUT))
1222                 ret = uverbs_output_written(attrs, UVERBS_ATTR_CORE_OUT);
1223
1224 out_put:
1225         rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
1226                                 UVERBS_LOOKUP_READ);
1227         return ret;
1228 }
1229
1230 static int ib_uverbs_req_notify_cq(struct uverbs_attr_bundle *attrs)
1231 {
1232         struct ib_uverbs_req_notify_cq cmd;
1233         struct ib_cq                  *cq;
1234         int ret;
1235
1236         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1237         if (ret)
1238                 return ret;
1239
1240         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
1241         if (!cq)
1242                 return -EINVAL;
1243
1244         ib_req_notify_cq(cq, cmd.solicited_only ?
1245                          IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
1246
1247         rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
1248                                 UVERBS_LOOKUP_READ);
1249         return 0;
1250 }
1251
1252 static int ib_uverbs_destroy_cq(struct uverbs_attr_bundle *attrs)
1253 {
1254         struct ib_uverbs_destroy_cq      cmd;
1255         struct ib_uverbs_destroy_cq_resp resp;
1256         struct ib_uobject               *uobj;
1257         struct ib_ucq_object            *obj;
1258         int ret;
1259
1260         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1261         if (ret)
1262                 return ret;
1263
1264         uobj = uobj_get_destroy(UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
1265         if (IS_ERR(uobj))
1266                 return PTR_ERR(uobj);
1267
1268         obj = container_of(uobj, struct ib_ucq_object, uevent.uobject);
1269         memset(&resp, 0, sizeof(resp));
1270         resp.comp_events_reported  = obj->comp_events_reported;
1271         resp.async_events_reported = obj->uevent.events_reported;
1272
1273         uobj_put_destroy(uobj);
1274
1275         return uverbs_response(attrs, &resp, sizeof(resp));
1276 }
1277
1278 static int create_qp(struct uverbs_attr_bundle *attrs,
1279                      struct ib_uverbs_ex_create_qp *cmd)
1280 {
1281         struct ib_uqp_object            *obj;
1282         struct ib_device                *device;
1283         struct ib_pd                    *pd = NULL;
1284         struct ib_xrcd                  *xrcd = NULL;
1285         struct ib_uobject               *xrcd_uobj = ERR_PTR(-ENOENT);
1286         struct ib_cq                    *scq = NULL, *rcq = NULL;
1287         struct ib_srq                   *srq = NULL;
1288         struct ib_qp                    *qp;
1289         struct ib_qp_init_attr          attr = {};
1290         struct ib_uverbs_ex_create_qp_resp resp = {};
1291         int                             ret;
1292         struct ib_rwq_ind_table *ind_tbl = NULL;
1293         bool has_sq = true;
1294         struct ib_device *ib_dev;
1295
1296         switch (cmd->qp_type) {
1297         case IB_QPT_RAW_PACKET:
1298                 if (!capable(CAP_NET_RAW))
1299                         return -EPERM;
1300                 break;
1301         case IB_QPT_RC:
1302         case IB_QPT_UC:
1303         case IB_QPT_UD:
1304         case IB_QPT_XRC_INI:
1305         case IB_QPT_XRC_TGT:
1306         case IB_QPT_DRIVER:
1307                 break;
1308         default:
1309                 return -EINVAL;
1310         }
1311
1312         obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs,
1313                                                  &ib_dev);
1314         if (IS_ERR(obj))
1315                 return PTR_ERR(obj);
1316         obj->uxrcd = NULL;
1317         obj->uevent.uobject.user_handle = cmd->user_handle;
1318         mutex_init(&obj->mcast_lock);
1319
1320         if (cmd->comp_mask & IB_UVERBS_CREATE_QP_MASK_IND_TABLE) {
1321                 ind_tbl = uobj_get_obj_read(rwq_ind_table,
1322                                             UVERBS_OBJECT_RWQ_IND_TBL,
1323                                             cmd->rwq_ind_tbl_handle, attrs);
1324                 if (!ind_tbl) {
1325                         ret = -EINVAL;
1326                         goto err_put;
1327                 }
1328
1329                 attr.rwq_ind_tbl = ind_tbl;
1330         }
1331
1332         if (ind_tbl && (cmd->max_recv_wr || cmd->max_recv_sge || cmd->is_srq)) {
1333                 ret = -EINVAL;
1334                 goto err_put;
1335         }
1336
1337         if (ind_tbl && !cmd->max_send_wr)
1338                 has_sq = false;
1339
1340         if (cmd->qp_type == IB_QPT_XRC_TGT) {
1341                 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->pd_handle,
1342                                           attrs);
1343
1344                 if (IS_ERR(xrcd_uobj)) {
1345                         ret = -EINVAL;
1346                         goto err_put;
1347                 }
1348
1349                 xrcd = (struct ib_xrcd *)xrcd_uobj->object;
1350                 if (!xrcd) {
1351                         ret = -EINVAL;
1352                         goto err_put;
1353                 }
1354                 device = xrcd->device;
1355         } else {
1356                 if (cmd->qp_type == IB_QPT_XRC_INI) {
1357                         cmd->max_recv_wr = 0;
1358                         cmd->max_recv_sge = 0;
1359                 } else {
1360                         if (cmd->is_srq) {
1361                                 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ,
1362                                                         cmd->srq_handle, attrs);
1363                                 if (!srq || srq->srq_type == IB_SRQT_XRC) {
1364                                         ret = -EINVAL;
1365                                         goto err_put;
1366                                 }
1367                         }
1368
1369                         if (!ind_tbl) {
1370                                 if (cmd->recv_cq_handle != cmd->send_cq_handle) {
1371                                         rcq = uobj_get_obj_read(
1372                                                 cq, UVERBS_OBJECT_CQ,
1373                                                 cmd->recv_cq_handle, attrs);
1374                                         if (!rcq) {
1375                                                 ret = -EINVAL;
1376                                                 goto err_put;
1377                                         }
1378                                 }
1379                         }
1380                 }
1381
1382                 if (has_sq)
1383                         scq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ,
1384                                                 cmd->send_cq_handle, attrs);
1385                 if (!ind_tbl && cmd->qp_type != IB_QPT_XRC_INI)
1386                         rcq = rcq ?: scq;
1387                 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle,
1388                                        attrs);
1389                 if (!pd || (!scq && has_sq)) {
1390                         ret = -EINVAL;
1391                         goto err_put;
1392                 }
1393
1394                 device = pd->device;
1395         }
1396
1397         attr.event_handler = ib_uverbs_qp_event_handler;
1398         attr.send_cq       = scq;
1399         attr.recv_cq       = rcq;
1400         attr.srq           = srq;
1401         attr.xrcd          = xrcd;
1402         attr.sq_sig_type   = cmd->sq_sig_all ? IB_SIGNAL_ALL_WR :
1403                                               IB_SIGNAL_REQ_WR;
1404         attr.qp_type       = cmd->qp_type;
1405
1406         attr.cap.max_send_wr     = cmd->max_send_wr;
1407         attr.cap.max_recv_wr     = cmd->max_recv_wr;
1408         attr.cap.max_send_sge    = cmd->max_send_sge;
1409         attr.cap.max_recv_sge    = cmd->max_recv_sge;
1410         attr.cap.max_inline_data = cmd->max_inline_data;
1411
1412         INIT_LIST_HEAD(&obj->uevent.event_list);
1413         INIT_LIST_HEAD(&obj->mcast_list);
1414
1415         attr.create_flags = cmd->create_flags;
1416         if (attr.create_flags & ~(IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK |
1417                                 IB_QP_CREATE_CROSS_CHANNEL |
1418                                 IB_QP_CREATE_MANAGED_SEND |
1419                                 IB_QP_CREATE_MANAGED_RECV |
1420                                 IB_QP_CREATE_SCATTER_FCS |
1421                                 IB_QP_CREATE_CVLAN_STRIPPING |
1422                                 IB_QP_CREATE_SOURCE_QPN |
1423                                 IB_QP_CREATE_PCI_WRITE_END_PADDING)) {
1424                 ret = -EINVAL;
1425                 goto err_put;
1426         }
1427
1428         if (attr.create_flags & IB_QP_CREATE_SOURCE_QPN) {
1429                 if (!capable(CAP_NET_RAW)) {
1430                         ret = -EPERM;
1431                         goto err_put;
1432                 }
1433
1434                 attr.source_qpn = cmd->source_qpn;
1435         }
1436
1437         qp = ib_create_qp_user(device, pd, &attr, &attrs->driver_udata, obj,
1438                                KBUILD_MODNAME);
1439         if (IS_ERR(qp)) {
1440                 ret = PTR_ERR(qp);
1441                 goto err_put;
1442         }
1443         ib_qp_usecnt_inc(qp);
1444
1445         obj->uevent.uobject.object = qp;
1446         obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file);
1447         if (obj->uevent.event_file)
1448                 uverbs_uobject_get(&obj->uevent.event_file->uobj);
1449
1450         if (xrcd) {
1451                 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object,
1452                                           uobject);
1453                 atomic_inc(&obj->uxrcd->refcnt);
1454                 uobj_put_read(xrcd_uobj);
1455         }
1456
1457         if (pd)
1458                 uobj_put_obj_read(pd);
1459         if (scq)
1460                 rdma_lookup_put_uobject(&scq->uobject->uevent.uobject,
1461                                         UVERBS_LOOKUP_READ);
1462         if (rcq && rcq != scq)
1463                 rdma_lookup_put_uobject(&rcq->uobject->uevent.uobject,
1464                                         UVERBS_LOOKUP_READ);
1465         if (srq)
1466                 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
1467                                         UVERBS_LOOKUP_READ);
1468         if (ind_tbl)
1469                 uobj_put_obj_read(ind_tbl);
1470         uobj_finalize_uobj_create(&obj->uevent.uobject, attrs);
1471
1472         resp.base.qpn             = qp->qp_num;
1473         resp.base.qp_handle       = obj->uevent.uobject.id;
1474         resp.base.max_recv_sge    = attr.cap.max_recv_sge;
1475         resp.base.max_send_sge    = attr.cap.max_send_sge;
1476         resp.base.max_recv_wr     = attr.cap.max_recv_wr;
1477         resp.base.max_send_wr     = attr.cap.max_send_wr;
1478         resp.base.max_inline_data = attr.cap.max_inline_data;
1479         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
1480         return uverbs_response(attrs, &resp, sizeof(resp));
1481
1482 err_put:
1483         if (!IS_ERR(xrcd_uobj))
1484                 uobj_put_read(xrcd_uobj);
1485         if (pd)
1486                 uobj_put_obj_read(pd);
1487         if (scq)
1488                 rdma_lookup_put_uobject(&scq->uobject->uevent.uobject,
1489                                         UVERBS_LOOKUP_READ);
1490         if (rcq && rcq != scq)
1491                 rdma_lookup_put_uobject(&rcq->uobject->uevent.uobject,
1492                                         UVERBS_LOOKUP_READ);
1493         if (srq)
1494                 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
1495                                         UVERBS_LOOKUP_READ);
1496         if (ind_tbl)
1497                 uobj_put_obj_read(ind_tbl);
1498
1499         uobj_alloc_abort(&obj->uevent.uobject, attrs);
1500         return ret;
1501 }
1502
1503 static int ib_uverbs_create_qp(struct uverbs_attr_bundle *attrs)
1504 {
1505         struct ib_uverbs_create_qp      cmd;
1506         struct ib_uverbs_ex_create_qp   cmd_ex;
1507         int ret;
1508
1509         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1510         if (ret)
1511                 return ret;
1512
1513         memset(&cmd_ex, 0, sizeof(cmd_ex));
1514         cmd_ex.user_handle = cmd.user_handle;
1515         cmd_ex.pd_handle = cmd.pd_handle;
1516         cmd_ex.send_cq_handle = cmd.send_cq_handle;
1517         cmd_ex.recv_cq_handle = cmd.recv_cq_handle;
1518         cmd_ex.srq_handle = cmd.srq_handle;
1519         cmd_ex.max_send_wr = cmd.max_send_wr;
1520         cmd_ex.max_recv_wr = cmd.max_recv_wr;
1521         cmd_ex.max_send_sge = cmd.max_send_sge;
1522         cmd_ex.max_recv_sge = cmd.max_recv_sge;
1523         cmd_ex.max_inline_data = cmd.max_inline_data;
1524         cmd_ex.sq_sig_all = cmd.sq_sig_all;
1525         cmd_ex.qp_type = cmd.qp_type;
1526         cmd_ex.is_srq = cmd.is_srq;
1527
1528         return create_qp(attrs, &cmd_ex);
1529 }
1530
1531 static int ib_uverbs_ex_create_qp(struct uverbs_attr_bundle *attrs)
1532 {
1533         struct ib_uverbs_ex_create_qp cmd;
1534         int ret;
1535
1536         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1537         if (ret)
1538                 return ret;
1539
1540         if (cmd.comp_mask & ~IB_UVERBS_CREATE_QP_SUP_COMP_MASK)
1541                 return -EINVAL;
1542
1543         if (cmd.reserved)
1544                 return -EINVAL;
1545
1546         return create_qp(attrs, &cmd);
1547 }
1548
1549 static int ib_uverbs_open_qp(struct uverbs_attr_bundle *attrs)
1550 {
1551         struct ib_uverbs_create_qp_resp resp = {};
1552         struct ib_uverbs_open_qp        cmd;
1553         struct ib_uqp_object           *obj;
1554         struct ib_xrcd                 *xrcd;
1555         struct ib_qp                   *qp;
1556         struct ib_qp_open_attr          attr = {};
1557         int ret;
1558         struct ib_uobject *xrcd_uobj;
1559         struct ib_device *ib_dev;
1560
1561         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1562         if (ret)
1563                 return ret;
1564
1565         obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs,
1566                                                  &ib_dev);
1567         if (IS_ERR(obj))
1568                 return PTR_ERR(obj);
1569
1570         xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd.pd_handle, attrs);
1571         if (IS_ERR(xrcd_uobj)) {
1572                 ret = -EINVAL;
1573                 goto err_put;
1574         }
1575
1576         xrcd = (struct ib_xrcd *)xrcd_uobj->object;
1577         if (!xrcd) {
1578                 ret = -EINVAL;
1579                 goto err_xrcd;
1580         }
1581
1582         attr.event_handler = ib_uverbs_qp_event_handler;
1583         attr.qp_num        = cmd.qpn;
1584         attr.qp_type       = cmd.qp_type;
1585
1586         INIT_LIST_HEAD(&obj->uevent.event_list);
1587         INIT_LIST_HEAD(&obj->mcast_list);
1588
1589         qp = ib_open_qp(xrcd, &attr);
1590         if (IS_ERR(qp)) {
1591                 ret = PTR_ERR(qp);
1592                 goto err_xrcd;
1593         }
1594
1595         obj->uevent.uobject.object = qp;
1596         obj->uevent.uobject.user_handle = cmd.user_handle;
1597
1598         obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
1599         atomic_inc(&obj->uxrcd->refcnt);
1600         qp->uobject = obj;
1601         uobj_put_read(xrcd_uobj);
1602         uobj_finalize_uobj_create(&obj->uevent.uobject, attrs);
1603
1604         resp.qpn = qp->qp_num;
1605         resp.qp_handle = obj->uevent.uobject.id;
1606         return uverbs_response(attrs, &resp, sizeof(resp));
1607
1608 err_xrcd:
1609         uobj_put_read(xrcd_uobj);
1610 err_put:
1611         uobj_alloc_abort(&obj->uevent.uobject, attrs);
1612         return ret;
1613 }
1614
1615 static void copy_ah_attr_to_uverbs(struct ib_uverbs_qp_dest *uverb_attr,
1616                                    struct rdma_ah_attr *rdma_attr)
1617 {
1618         const struct ib_global_route   *grh;
1619
1620         uverb_attr->dlid              = rdma_ah_get_dlid(rdma_attr);
1621         uverb_attr->sl                = rdma_ah_get_sl(rdma_attr);
1622         uverb_attr->src_path_bits     = rdma_ah_get_path_bits(rdma_attr);
1623         uverb_attr->static_rate       = rdma_ah_get_static_rate(rdma_attr);
1624         uverb_attr->is_global         = !!(rdma_ah_get_ah_flags(rdma_attr) &
1625                                          IB_AH_GRH);
1626         if (uverb_attr->is_global) {
1627                 grh = rdma_ah_read_grh(rdma_attr);
1628                 memcpy(uverb_attr->dgid, grh->dgid.raw, 16);
1629                 uverb_attr->flow_label        = grh->flow_label;
1630                 uverb_attr->sgid_index        = grh->sgid_index;
1631                 uverb_attr->hop_limit         = grh->hop_limit;
1632                 uverb_attr->traffic_class     = grh->traffic_class;
1633         }
1634         uverb_attr->port_num          = rdma_ah_get_port_num(rdma_attr);
1635 }
1636
1637 static int ib_uverbs_query_qp(struct uverbs_attr_bundle *attrs)
1638 {
1639         struct ib_uverbs_query_qp      cmd;
1640         struct ib_uverbs_query_qp_resp resp;
1641         struct ib_qp                   *qp;
1642         struct ib_qp_attr              *attr;
1643         struct ib_qp_init_attr         *init_attr;
1644         int                            ret;
1645
1646         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1647         if (ret)
1648                 return ret;
1649
1650         attr      = kmalloc(sizeof *attr, GFP_KERNEL);
1651         init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1652         if (!attr || !init_attr) {
1653                 ret = -ENOMEM;
1654                 goto out;
1655         }
1656
1657         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
1658         if (!qp) {
1659                 ret = -EINVAL;
1660                 goto out;
1661         }
1662
1663         ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1664
1665         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
1666                                 UVERBS_LOOKUP_READ);
1667
1668         if (ret)
1669                 goto out;
1670
1671         memset(&resp, 0, sizeof resp);
1672
1673         resp.qp_state               = attr->qp_state;
1674         resp.cur_qp_state           = attr->cur_qp_state;
1675         resp.path_mtu               = attr->path_mtu;
1676         resp.path_mig_state         = attr->path_mig_state;
1677         resp.qkey                   = attr->qkey;
1678         resp.rq_psn                 = attr->rq_psn;
1679         resp.sq_psn                 = attr->sq_psn;
1680         resp.dest_qp_num            = attr->dest_qp_num;
1681         resp.qp_access_flags        = attr->qp_access_flags;
1682         resp.pkey_index             = attr->pkey_index;
1683         resp.alt_pkey_index         = attr->alt_pkey_index;
1684         resp.sq_draining            = attr->sq_draining;
1685         resp.max_rd_atomic          = attr->max_rd_atomic;
1686         resp.max_dest_rd_atomic     = attr->max_dest_rd_atomic;
1687         resp.min_rnr_timer          = attr->min_rnr_timer;
1688         resp.port_num               = attr->port_num;
1689         resp.timeout                = attr->timeout;
1690         resp.retry_cnt              = attr->retry_cnt;
1691         resp.rnr_retry              = attr->rnr_retry;
1692         resp.alt_port_num           = attr->alt_port_num;
1693         resp.alt_timeout            = attr->alt_timeout;
1694
1695         copy_ah_attr_to_uverbs(&resp.dest, &attr->ah_attr);
1696         copy_ah_attr_to_uverbs(&resp.alt_dest, &attr->alt_ah_attr);
1697
1698         resp.max_send_wr            = init_attr->cap.max_send_wr;
1699         resp.max_recv_wr            = init_attr->cap.max_recv_wr;
1700         resp.max_send_sge           = init_attr->cap.max_send_sge;
1701         resp.max_recv_sge           = init_attr->cap.max_recv_sge;
1702         resp.max_inline_data        = init_attr->cap.max_inline_data;
1703         resp.sq_sig_all             = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1704
1705         ret = uverbs_response(attrs, &resp, sizeof(resp));
1706
1707 out:
1708         kfree(attr);
1709         kfree(init_attr);
1710
1711         return ret;
1712 }
1713
1714 /* Remove ignored fields set in the attribute mask */
1715 static int modify_qp_mask(enum ib_qp_type qp_type, int mask)
1716 {
1717         switch (qp_type) {
1718         case IB_QPT_XRC_INI:
1719                 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER);
1720         case IB_QPT_XRC_TGT:
1721                 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT |
1722                                 IB_QP_RNR_RETRY);
1723         default:
1724                 return mask;
1725         }
1726 }
1727
1728 static void copy_ah_attr_from_uverbs(struct ib_device *dev,
1729                                      struct rdma_ah_attr *rdma_attr,
1730                                      struct ib_uverbs_qp_dest *uverb_attr)
1731 {
1732         rdma_attr->type = rdma_ah_find_type(dev, uverb_attr->port_num);
1733         if (uverb_attr->is_global) {
1734                 rdma_ah_set_grh(rdma_attr, NULL,
1735                                 uverb_attr->flow_label,
1736                                 uverb_attr->sgid_index,
1737                                 uverb_attr->hop_limit,
1738                                 uverb_attr->traffic_class);
1739                 rdma_ah_set_dgid_raw(rdma_attr, uverb_attr->dgid);
1740         } else {
1741                 rdma_ah_set_ah_flags(rdma_attr, 0);
1742         }
1743         rdma_ah_set_dlid(rdma_attr, uverb_attr->dlid);
1744         rdma_ah_set_sl(rdma_attr, uverb_attr->sl);
1745         rdma_ah_set_path_bits(rdma_attr, uverb_attr->src_path_bits);
1746         rdma_ah_set_static_rate(rdma_attr, uverb_attr->static_rate);
1747         rdma_ah_set_port_num(rdma_attr, uverb_attr->port_num);
1748         rdma_ah_set_make_grd(rdma_attr, false);
1749 }
1750
1751 static int modify_qp(struct uverbs_attr_bundle *attrs,
1752                      struct ib_uverbs_ex_modify_qp *cmd)
1753 {
1754         struct ib_qp_attr *attr;
1755         struct ib_qp *qp;
1756         int ret;
1757
1758         attr = kzalloc(sizeof(*attr), GFP_KERNEL);
1759         if (!attr)
1760                 return -ENOMEM;
1761
1762         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd->base.qp_handle,
1763                                attrs);
1764         if (!qp) {
1765                 ret = -EINVAL;
1766                 goto out;
1767         }
1768
1769         if ((cmd->base.attr_mask & IB_QP_PORT) &&
1770             !rdma_is_port_valid(qp->device, cmd->base.port_num)) {
1771                 ret = -EINVAL;
1772                 goto release_qp;
1773         }
1774
1775         if ((cmd->base.attr_mask & IB_QP_AV)) {
1776                 if (!rdma_is_port_valid(qp->device, cmd->base.dest.port_num)) {
1777                         ret = -EINVAL;
1778                         goto release_qp;
1779                 }
1780
1781                 if (cmd->base.attr_mask & IB_QP_STATE &&
1782                     cmd->base.qp_state == IB_QPS_RTR) {
1783                 /* We are in INIT->RTR TRANSITION (if we are not,
1784                  * this transition will be rejected in subsequent checks).
1785                  * In the INIT->RTR transition, we cannot have IB_QP_PORT set,
1786                  * but the IB_QP_STATE flag is required.
1787                  *
1788                  * Since kernel 3.14 (commit dbf727de7440), the uverbs driver,
1789                  * when IB_QP_AV is set, has required inclusion of a valid
1790                  * port number in the primary AV. (AVs are created and handled
1791                  * differently for infiniband and ethernet (RoCE) ports).
1792                  *
1793                  * Check the port number included in the primary AV against
1794                  * the port number in the qp struct, which was set (and saved)
1795                  * in the RST->INIT transition.
1796                  */
1797                         if (cmd->base.dest.port_num != qp->real_qp->port) {
1798                                 ret = -EINVAL;
1799                                 goto release_qp;
1800                         }
1801                 } else {
1802                 /* We are in SQD->SQD. (If we are not, this transition will
1803                  * be rejected later in the verbs layer checks).
1804                  * Check for both IB_QP_PORT and IB_QP_AV, these can be set
1805                  * together in the SQD->SQD transition.
1806                  *
1807                  * If only IP_QP_AV was set, add in IB_QP_PORT as well (the
1808                  * verbs layer driver does not track primary port changes
1809                  * resulting from path migration. Thus, in SQD, if the primary
1810                  * AV is modified, the primary port should also be modified).
1811                  *
1812                  * Note that in this transition, the IB_QP_STATE flag
1813                  * is not allowed.
1814                  */
1815                         if (((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT))
1816                              == (IB_QP_AV | IB_QP_PORT)) &&
1817                             cmd->base.port_num != cmd->base.dest.port_num) {
1818                                 ret = -EINVAL;
1819                                 goto release_qp;
1820                         }
1821                         if ((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT))
1822                             == IB_QP_AV) {
1823                                 cmd->base.attr_mask |= IB_QP_PORT;
1824                                 cmd->base.port_num = cmd->base.dest.port_num;
1825                         }
1826                 }
1827         }
1828
1829         if ((cmd->base.attr_mask & IB_QP_ALT_PATH) &&
1830             (!rdma_is_port_valid(qp->device, cmd->base.alt_port_num) ||
1831             !rdma_is_port_valid(qp->device, cmd->base.alt_dest.port_num) ||
1832             cmd->base.alt_port_num != cmd->base.alt_dest.port_num)) {
1833                 ret = -EINVAL;
1834                 goto release_qp;
1835         }
1836
1837         if ((cmd->base.attr_mask & IB_QP_CUR_STATE &&
1838             cmd->base.cur_qp_state > IB_QPS_ERR) ||
1839             (cmd->base.attr_mask & IB_QP_STATE &&
1840             cmd->base.qp_state > IB_QPS_ERR)) {
1841                 ret = -EINVAL;
1842                 goto release_qp;
1843         }
1844
1845         if (cmd->base.attr_mask & IB_QP_STATE)
1846                 attr->qp_state = cmd->base.qp_state;
1847         if (cmd->base.attr_mask & IB_QP_CUR_STATE)
1848                 attr->cur_qp_state = cmd->base.cur_qp_state;
1849         if (cmd->base.attr_mask & IB_QP_PATH_MTU)
1850                 attr->path_mtu = cmd->base.path_mtu;
1851         if (cmd->base.attr_mask & IB_QP_PATH_MIG_STATE)
1852                 attr->path_mig_state = cmd->base.path_mig_state;
1853         if (cmd->base.attr_mask & IB_QP_QKEY) {
1854                 if (cmd->base.qkey & IB_QP_SET_QKEY && !capable(CAP_NET_RAW)) {
1855                         ret = -EPERM;
1856                         goto release_qp;
1857                 }
1858                 attr->qkey = cmd->base.qkey;
1859         }
1860         if (cmd->base.attr_mask & IB_QP_RQ_PSN)
1861                 attr->rq_psn = cmd->base.rq_psn;
1862         if (cmd->base.attr_mask & IB_QP_SQ_PSN)
1863                 attr->sq_psn = cmd->base.sq_psn;
1864         if (cmd->base.attr_mask & IB_QP_DEST_QPN)
1865                 attr->dest_qp_num = cmd->base.dest_qp_num;
1866         if (cmd->base.attr_mask & IB_QP_ACCESS_FLAGS)
1867                 attr->qp_access_flags = cmd->base.qp_access_flags;
1868         if (cmd->base.attr_mask & IB_QP_PKEY_INDEX)
1869                 attr->pkey_index = cmd->base.pkey_index;
1870         if (cmd->base.attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY)
1871                 attr->en_sqd_async_notify = cmd->base.en_sqd_async_notify;
1872         if (cmd->base.attr_mask & IB_QP_MAX_QP_RD_ATOMIC)
1873                 attr->max_rd_atomic = cmd->base.max_rd_atomic;
1874         if (cmd->base.attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
1875                 attr->max_dest_rd_atomic = cmd->base.max_dest_rd_atomic;
1876         if (cmd->base.attr_mask & IB_QP_MIN_RNR_TIMER)
1877                 attr->min_rnr_timer = cmd->base.min_rnr_timer;
1878         if (cmd->base.attr_mask & IB_QP_PORT)
1879                 attr->port_num = cmd->base.port_num;
1880         if (cmd->base.attr_mask & IB_QP_TIMEOUT)
1881                 attr->timeout = cmd->base.timeout;
1882         if (cmd->base.attr_mask & IB_QP_RETRY_CNT)
1883                 attr->retry_cnt = cmd->base.retry_cnt;
1884         if (cmd->base.attr_mask & IB_QP_RNR_RETRY)
1885                 attr->rnr_retry = cmd->base.rnr_retry;
1886         if (cmd->base.attr_mask & IB_QP_ALT_PATH) {
1887                 attr->alt_port_num = cmd->base.alt_port_num;
1888                 attr->alt_timeout = cmd->base.alt_timeout;
1889                 attr->alt_pkey_index = cmd->base.alt_pkey_index;
1890         }
1891         if (cmd->base.attr_mask & IB_QP_RATE_LIMIT)
1892                 attr->rate_limit = cmd->rate_limit;
1893
1894         if (cmd->base.attr_mask & IB_QP_AV)
1895                 copy_ah_attr_from_uverbs(qp->device, &attr->ah_attr,
1896                                          &cmd->base.dest);
1897
1898         if (cmd->base.attr_mask & IB_QP_ALT_PATH)
1899                 copy_ah_attr_from_uverbs(qp->device, &attr->alt_ah_attr,
1900                                          &cmd->base.alt_dest);
1901
1902         ret = ib_modify_qp_with_udata(qp, attr,
1903                                       modify_qp_mask(qp->qp_type,
1904                                                      cmd->base.attr_mask),
1905                                       &attrs->driver_udata);
1906
1907 release_qp:
1908         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
1909                                 UVERBS_LOOKUP_READ);
1910 out:
1911         kfree(attr);
1912
1913         return ret;
1914 }
1915
1916 static int ib_uverbs_modify_qp(struct uverbs_attr_bundle *attrs)
1917 {
1918         struct ib_uverbs_ex_modify_qp cmd;
1919         int ret;
1920
1921         ret = uverbs_request(attrs, &cmd.base, sizeof(cmd.base));
1922         if (ret)
1923                 return ret;
1924
1925         if (cmd.base.attr_mask & ~IB_QP_ATTR_STANDARD_BITS)
1926                 return -EOPNOTSUPP;
1927
1928         return modify_qp(attrs, &cmd);
1929 }
1930
1931 static int ib_uverbs_ex_modify_qp(struct uverbs_attr_bundle *attrs)
1932 {
1933         struct ib_uverbs_ex_modify_qp cmd;
1934         struct ib_uverbs_ex_modify_qp_resp resp = {
1935                 .response_length = uverbs_response_length(attrs, sizeof(resp))
1936         };
1937         int ret;
1938
1939         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1940         if (ret)
1941                 return ret;
1942
1943         /*
1944          * Last bit is reserved for extending the attr_mask by
1945          * using another field.
1946          */
1947         if (cmd.base.attr_mask & ~(IB_QP_ATTR_STANDARD_BITS | IB_QP_RATE_LIMIT))
1948                 return -EOPNOTSUPP;
1949
1950         ret = modify_qp(attrs, &cmd);
1951         if (ret)
1952                 return ret;
1953
1954         return uverbs_response(attrs, &resp, sizeof(resp));
1955 }
1956
1957 static int ib_uverbs_destroy_qp(struct uverbs_attr_bundle *attrs)
1958 {
1959         struct ib_uverbs_destroy_qp      cmd;
1960         struct ib_uverbs_destroy_qp_resp resp;
1961         struct ib_uobject               *uobj;
1962         struct ib_uqp_object            *obj;
1963         int ret;
1964
1965         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1966         if (ret)
1967                 return ret;
1968
1969         uobj = uobj_get_destroy(UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
1970         if (IS_ERR(uobj))
1971                 return PTR_ERR(uobj);
1972
1973         obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
1974         memset(&resp, 0, sizeof(resp));
1975         resp.events_reported = obj->uevent.events_reported;
1976
1977         uobj_put_destroy(uobj);
1978
1979         return uverbs_response(attrs, &resp, sizeof(resp));
1980 }
1981
1982 static void *alloc_wr(size_t wr_size, __u32 num_sge)
1983 {
1984         if (num_sge >= (U32_MAX - ALIGN(wr_size, sizeof(struct ib_sge))) /
1985                                sizeof(struct ib_sge))
1986                 return NULL;
1987
1988         return kmalloc(ALIGN(wr_size, sizeof(struct ib_sge)) +
1989                                num_sge * sizeof(struct ib_sge),
1990                        GFP_KERNEL);
1991 }
1992
1993 static int ib_uverbs_post_send(struct uverbs_attr_bundle *attrs)
1994 {
1995         struct ib_uverbs_post_send      cmd;
1996         struct ib_uverbs_post_send_resp resp;
1997         struct ib_uverbs_send_wr       *user_wr;
1998         struct ib_send_wr              *wr = NULL, *last, *next;
1999         const struct ib_send_wr        *bad_wr;
2000         struct ib_qp                   *qp;
2001         int                             i, sg_ind;
2002         int                             is_ud;
2003         int ret, ret2;
2004         size_t                          next_size;
2005         const struct ib_sge __user *sgls;
2006         const void __user *wqes;
2007         struct uverbs_req_iter iter;
2008
2009         ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
2010         if (ret)
2011                 return ret;
2012         wqes = uverbs_request_next_ptr(&iter, cmd.wqe_size * cmd.wr_count);
2013         if (IS_ERR(wqes))
2014                 return PTR_ERR(wqes);
2015         sgls = uverbs_request_next_ptr(
2016                 &iter, cmd.sge_count * sizeof(struct ib_uverbs_sge));
2017         if (IS_ERR(sgls))
2018                 return PTR_ERR(sgls);
2019         ret = uverbs_request_finish(&iter);
2020         if (ret)
2021                 return ret;
2022
2023         user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
2024         if (!user_wr)
2025                 return -ENOMEM;
2026
2027         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2028         if (!qp) {
2029                 ret = -EINVAL;
2030                 goto out;
2031         }
2032
2033         is_ud = qp->qp_type == IB_QPT_UD;
2034         sg_ind = 0;
2035         last = NULL;
2036         for (i = 0; i < cmd.wr_count; ++i) {
2037                 if (copy_from_user(user_wr, wqes + i * cmd.wqe_size,
2038                                    cmd.wqe_size)) {
2039                         ret = -EFAULT;
2040                         goto out_put;
2041                 }
2042
2043                 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
2044                         ret = -EINVAL;
2045                         goto out_put;
2046                 }
2047
2048                 if (is_ud) {
2049                         struct ib_ud_wr *ud;
2050
2051                         if (user_wr->opcode != IB_WR_SEND &&
2052                             user_wr->opcode != IB_WR_SEND_WITH_IMM) {
2053                                 ret = -EINVAL;
2054                                 goto out_put;
2055                         }
2056
2057                         next_size = sizeof(*ud);
2058                         ud = alloc_wr(next_size, user_wr->num_sge);
2059                         if (!ud) {
2060                                 ret = -ENOMEM;
2061                                 goto out_put;
2062                         }
2063
2064                         ud->ah = uobj_get_obj_read(ah, UVERBS_OBJECT_AH,
2065                                                    user_wr->wr.ud.ah, attrs);
2066                         if (!ud->ah) {
2067                                 kfree(ud);
2068                                 ret = -EINVAL;
2069                                 goto out_put;
2070                         }
2071                         ud->remote_qpn = user_wr->wr.ud.remote_qpn;
2072                         ud->remote_qkey = user_wr->wr.ud.remote_qkey;
2073
2074                         next = &ud->wr;
2075                 } else if (user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM ||
2076                            user_wr->opcode == IB_WR_RDMA_WRITE ||
2077                            user_wr->opcode == IB_WR_RDMA_READ) {
2078                         struct ib_rdma_wr *rdma;
2079
2080                         next_size = sizeof(*rdma);
2081                         rdma = alloc_wr(next_size, user_wr->num_sge);
2082                         if (!rdma) {
2083                                 ret = -ENOMEM;
2084                                 goto out_put;
2085                         }
2086
2087                         rdma->remote_addr = user_wr->wr.rdma.remote_addr;
2088                         rdma->rkey = user_wr->wr.rdma.rkey;
2089
2090                         next = &rdma->wr;
2091                 } else if (user_wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP ||
2092                            user_wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) {
2093                         struct ib_atomic_wr *atomic;
2094
2095                         next_size = sizeof(*atomic);
2096                         atomic = alloc_wr(next_size, user_wr->num_sge);
2097                         if (!atomic) {
2098                                 ret = -ENOMEM;
2099                                 goto out_put;
2100                         }
2101
2102                         atomic->remote_addr = user_wr->wr.atomic.remote_addr;
2103                         atomic->compare_add = user_wr->wr.atomic.compare_add;
2104                         atomic->swap = user_wr->wr.atomic.swap;
2105                         atomic->rkey = user_wr->wr.atomic.rkey;
2106
2107                         next = &atomic->wr;
2108                 } else if (user_wr->opcode == IB_WR_SEND ||
2109                            user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2110                            user_wr->opcode == IB_WR_SEND_WITH_INV) {
2111                         next_size = sizeof(*next);
2112                         next = alloc_wr(next_size, user_wr->num_sge);
2113                         if (!next) {
2114                                 ret = -ENOMEM;
2115                                 goto out_put;
2116                         }
2117                 } else {
2118                         ret = -EINVAL;
2119                         goto out_put;
2120                 }
2121
2122                 if (user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2123                     user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) {
2124                         next->ex.imm_data =
2125                                         (__be32 __force) user_wr->ex.imm_data;
2126                 } else if (user_wr->opcode == IB_WR_SEND_WITH_INV) {
2127                         next->ex.invalidate_rkey = user_wr->ex.invalidate_rkey;
2128                 }
2129
2130                 if (!last)
2131                         wr = next;
2132                 else
2133                         last->next = next;
2134                 last = next;
2135
2136                 next->next       = NULL;
2137                 next->wr_id      = user_wr->wr_id;
2138                 next->num_sge    = user_wr->num_sge;
2139                 next->opcode     = user_wr->opcode;
2140                 next->send_flags = user_wr->send_flags;
2141
2142                 if (next->num_sge) {
2143                         next->sg_list = (void *) next +
2144                                 ALIGN(next_size, sizeof(struct ib_sge));
2145                         if (copy_from_user(next->sg_list, sgls + sg_ind,
2146                                            next->num_sge *
2147                                                    sizeof(struct ib_sge))) {
2148                                 ret = -EFAULT;
2149                                 goto out_put;
2150                         }
2151                         sg_ind += next->num_sge;
2152                 } else
2153                         next->sg_list = NULL;
2154         }
2155
2156         resp.bad_wr = 0;
2157         ret = qp->device->ops.post_send(qp->real_qp, wr, &bad_wr);
2158         if (ret)
2159                 for (next = wr; next; next = next->next) {
2160                         ++resp.bad_wr;
2161                         if (next == bad_wr)
2162                                 break;
2163                 }
2164
2165         ret2 = uverbs_response(attrs, &resp, sizeof(resp));
2166         if (ret2)
2167                 ret = ret2;
2168
2169 out_put:
2170         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
2171                                 UVERBS_LOOKUP_READ);
2172
2173         while (wr) {
2174                 if (is_ud && ud_wr(wr)->ah)
2175                         uobj_put_obj_read(ud_wr(wr)->ah);
2176                 next = wr->next;
2177                 kfree(wr);
2178                 wr = next;
2179         }
2180
2181 out:
2182         kfree(user_wr);
2183
2184         return ret;
2185 }
2186
2187 static struct ib_recv_wr *
2188 ib_uverbs_unmarshall_recv(struct uverbs_req_iter *iter, u32 wr_count,
2189                           u32 wqe_size, u32 sge_count)
2190 {
2191         struct ib_uverbs_recv_wr *user_wr;
2192         struct ib_recv_wr        *wr = NULL, *last, *next;
2193         int                       sg_ind;
2194         int                       i;
2195         int                       ret;
2196         const struct ib_sge __user *sgls;
2197         const void __user *wqes;
2198
2199         if (wqe_size < sizeof(struct ib_uverbs_recv_wr))
2200                 return ERR_PTR(-EINVAL);
2201
2202         wqes = uverbs_request_next_ptr(iter, wqe_size * wr_count);
2203         if (IS_ERR(wqes))
2204                 return ERR_CAST(wqes);
2205         sgls = uverbs_request_next_ptr(
2206                 iter, sge_count * sizeof(struct ib_uverbs_sge));
2207         if (IS_ERR(sgls))
2208                 return ERR_CAST(sgls);
2209         ret = uverbs_request_finish(iter);
2210         if (ret)
2211                 return ERR_PTR(ret);
2212
2213         user_wr = kmalloc(wqe_size, GFP_KERNEL);
2214         if (!user_wr)
2215                 return ERR_PTR(-ENOMEM);
2216
2217         sg_ind = 0;
2218         last = NULL;
2219         for (i = 0; i < wr_count; ++i) {
2220                 if (copy_from_user(user_wr, wqes + i * wqe_size,
2221                                    wqe_size)) {
2222                         ret = -EFAULT;
2223                         goto err;
2224                 }
2225
2226                 if (user_wr->num_sge + sg_ind > sge_count) {
2227                         ret = -EINVAL;
2228                         goto err;
2229                 }
2230
2231                 if (user_wr->num_sge >=
2232                     (U32_MAX - ALIGN(sizeof(*next), sizeof(struct ib_sge))) /
2233                             sizeof(struct ib_sge)) {
2234                         ret = -EINVAL;
2235                         goto err;
2236                 }
2237
2238                 next = kmalloc(ALIGN(sizeof(*next), sizeof(struct ib_sge)) +
2239                                        user_wr->num_sge * sizeof(struct ib_sge),
2240                                GFP_KERNEL);
2241                 if (!next) {
2242                         ret = -ENOMEM;
2243                         goto err;
2244                 }
2245
2246                 if (!last)
2247                         wr = next;
2248                 else
2249                         last->next = next;
2250                 last = next;
2251
2252                 next->next       = NULL;
2253                 next->wr_id      = user_wr->wr_id;
2254                 next->num_sge    = user_wr->num_sge;
2255
2256                 if (next->num_sge) {
2257                         next->sg_list = (void *)next +
2258                                 ALIGN(sizeof(*next), sizeof(struct ib_sge));
2259                         if (copy_from_user(next->sg_list, sgls + sg_ind,
2260                                            next->num_sge *
2261                                                    sizeof(struct ib_sge))) {
2262                                 ret = -EFAULT;
2263                                 goto err;
2264                         }
2265                         sg_ind += next->num_sge;
2266                 } else
2267                         next->sg_list = NULL;
2268         }
2269
2270         kfree(user_wr);
2271         return wr;
2272
2273 err:
2274         kfree(user_wr);
2275
2276         while (wr) {
2277                 next = wr->next;
2278                 kfree(wr);
2279                 wr = next;
2280         }
2281
2282         return ERR_PTR(ret);
2283 }
2284
2285 static int ib_uverbs_post_recv(struct uverbs_attr_bundle *attrs)
2286 {
2287         struct ib_uverbs_post_recv      cmd;
2288         struct ib_uverbs_post_recv_resp resp;
2289         struct ib_recv_wr              *wr, *next;
2290         const struct ib_recv_wr        *bad_wr;
2291         struct ib_qp                   *qp;
2292         int ret, ret2;
2293         struct uverbs_req_iter iter;
2294
2295         ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
2296         if (ret)
2297                 return ret;
2298
2299         wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size,
2300                                        cmd.sge_count);
2301         if (IS_ERR(wr))
2302                 return PTR_ERR(wr);
2303
2304         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2305         if (!qp) {
2306                 ret = -EINVAL;
2307                 goto out;
2308         }
2309
2310         resp.bad_wr = 0;
2311         ret = qp->device->ops.post_recv(qp->real_qp, wr, &bad_wr);
2312
2313         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
2314                                 UVERBS_LOOKUP_READ);
2315         if (ret) {
2316                 for (next = wr; next; next = next->next) {
2317                         ++resp.bad_wr;
2318                         if (next == bad_wr)
2319                                 break;
2320                 }
2321         }
2322
2323         ret2 = uverbs_response(attrs, &resp, sizeof(resp));
2324         if (ret2)
2325                 ret = ret2;
2326 out:
2327         while (wr) {
2328                 next = wr->next;
2329                 kfree(wr);
2330                 wr = next;
2331         }
2332
2333         return ret;
2334 }
2335
2336 static int ib_uverbs_post_srq_recv(struct uverbs_attr_bundle *attrs)
2337 {
2338         struct ib_uverbs_post_srq_recv      cmd;
2339         struct ib_uverbs_post_srq_recv_resp resp;
2340         struct ib_recv_wr                  *wr, *next;
2341         const struct ib_recv_wr            *bad_wr;
2342         struct ib_srq                      *srq;
2343         int ret, ret2;
2344         struct uverbs_req_iter iter;
2345
2346         ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
2347         if (ret)
2348                 return ret;
2349
2350         wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size,
2351                                        cmd.sge_count);
2352         if (IS_ERR(wr))
2353                 return PTR_ERR(wr);
2354
2355         srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
2356         if (!srq) {
2357                 ret = -EINVAL;
2358                 goto out;
2359         }
2360
2361         resp.bad_wr = 0;
2362         ret = srq->device->ops.post_srq_recv(srq, wr, &bad_wr);
2363
2364         rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
2365                                 UVERBS_LOOKUP_READ);
2366
2367         if (ret)
2368                 for (next = wr; next; next = next->next) {
2369                         ++resp.bad_wr;
2370                         if (next == bad_wr)
2371                                 break;
2372                 }
2373
2374         ret2 = uverbs_response(attrs, &resp, sizeof(resp));
2375         if (ret2)
2376                 ret = ret2;
2377
2378 out:
2379         while (wr) {
2380                 next = wr->next;
2381                 kfree(wr);
2382                 wr = next;
2383         }
2384
2385         return ret;
2386 }
2387
2388 static int ib_uverbs_create_ah(struct uverbs_attr_bundle *attrs)
2389 {
2390         struct ib_uverbs_create_ah       cmd;
2391         struct ib_uverbs_create_ah_resp  resp;
2392         struct ib_uobject               *uobj;
2393         struct ib_pd                    *pd;
2394         struct ib_ah                    *ah;
2395         struct rdma_ah_attr             attr = {};
2396         int ret;
2397         struct ib_device *ib_dev;
2398
2399         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2400         if (ret)
2401                 return ret;
2402
2403         uobj = uobj_alloc(UVERBS_OBJECT_AH, attrs, &ib_dev);
2404         if (IS_ERR(uobj))
2405                 return PTR_ERR(uobj);
2406
2407         if (!rdma_is_port_valid(ib_dev, cmd.attr.port_num)) {
2408                 ret = -EINVAL;
2409                 goto err;
2410         }
2411
2412         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
2413         if (!pd) {
2414                 ret = -EINVAL;
2415                 goto err;
2416         }
2417
2418         attr.type = rdma_ah_find_type(ib_dev, cmd.attr.port_num);
2419         rdma_ah_set_make_grd(&attr, false);
2420         rdma_ah_set_dlid(&attr, cmd.attr.dlid);
2421         rdma_ah_set_sl(&attr, cmd.attr.sl);
2422         rdma_ah_set_path_bits(&attr, cmd.attr.src_path_bits);
2423         rdma_ah_set_static_rate(&attr, cmd.attr.static_rate);
2424         rdma_ah_set_port_num(&attr, cmd.attr.port_num);
2425
2426         if (cmd.attr.is_global) {
2427                 rdma_ah_set_grh(&attr, NULL, cmd.attr.grh.flow_label,
2428                                 cmd.attr.grh.sgid_index,
2429                                 cmd.attr.grh.hop_limit,
2430                                 cmd.attr.grh.traffic_class);
2431                 rdma_ah_set_dgid_raw(&attr, cmd.attr.grh.dgid);
2432         } else {
2433                 rdma_ah_set_ah_flags(&attr, 0);
2434         }
2435
2436         ah = rdma_create_user_ah(pd, &attr, &attrs->driver_udata);
2437         if (IS_ERR(ah)) {
2438                 ret = PTR_ERR(ah);
2439                 goto err_put;
2440         }
2441
2442         ah->uobject  = uobj;
2443         uobj->user_handle = cmd.user_handle;
2444         uobj->object = ah;
2445         uobj_put_obj_read(pd);
2446         uobj_finalize_uobj_create(uobj, attrs);
2447
2448         resp.ah_handle = uobj->id;
2449         return uverbs_response(attrs, &resp, sizeof(resp));
2450
2451 err_put:
2452         uobj_put_obj_read(pd);
2453 err:
2454         uobj_alloc_abort(uobj, attrs);
2455         return ret;
2456 }
2457
2458 static int ib_uverbs_destroy_ah(struct uverbs_attr_bundle *attrs)
2459 {
2460         struct ib_uverbs_destroy_ah cmd;
2461         int ret;
2462
2463         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2464         if (ret)
2465                 return ret;
2466
2467         return uobj_perform_destroy(UVERBS_OBJECT_AH, cmd.ah_handle, attrs);
2468 }
2469
2470 static int ib_uverbs_attach_mcast(struct uverbs_attr_bundle *attrs)
2471 {
2472         struct ib_uverbs_attach_mcast cmd;
2473         struct ib_qp                 *qp;
2474         struct ib_uqp_object         *obj;
2475         struct ib_uverbs_mcast_entry *mcast;
2476         int                           ret;
2477
2478         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2479         if (ret)
2480                 return ret;
2481
2482         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2483         if (!qp)
2484                 return -EINVAL;
2485
2486         obj = qp->uobject;
2487
2488         mutex_lock(&obj->mcast_lock);
2489         list_for_each_entry(mcast, &obj->mcast_list, list)
2490                 if (cmd.mlid == mcast->lid &&
2491                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2492                         ret = 0;
2493                         goto out_put;
2494                 }
2495
2496         mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
2497         if (!mcast) {
2498                 ret = -ENOMEM;
2499                 goto out_put;
2500         }
2501
2502         mcast->lid = cmd.mlid;
2503         memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
2504
2505         ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
2506         if (!ret)
2507                 list_add_tail(&mcast->list, &obj->mcast_list);
2508         else
2509                 kfree(mcast);
2510
2511 out_put:
2512         mutex_unlock(&obj->mcast_lock);
2513         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
2514                                 UVERBS_LOOKUP_READ);
2515
2516         return ret;
2517 }
2518
2519 static int ib_uverbs_detach_mcast(struct uverbs_attr_bundle *attrs)
2520 {
2521         struct ib_uverbs_detach_mcast cmd;
2522         struct ib_uqp_object         *obj;
2523         struct ib_qp                 *qp;
2524         struct ib_uverbs_mcast_entry *mcast;
2525         int                           ret;
2526         bool                          found = false;
2527
2528         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2529         if (ret)
2530                 return ret;
2531
2532         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2533         if (!qp)
2534                 return -EINVAL;
2535
2536         obj = qp->uobject;
2537         mutex_lock(&obj->mcast_lock);
2538
2539         list_for_each_entry(mcast, &obj->mcast_list, list)
2540                 if (cmd.mlid == mcast->lid &&
2541                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2542                         list_del(&mcast->list);
2543                         kfree(mcast);
2544                         found = true;
2545                         break;
2546                 }
2547
2548         if (!found) {
2549                 ret = -EINVAL;
2550                 goto out_put;
2551         }
2552
2553         ret = ib_detach_mcast(qp, (union ib_gid *)cmd.gid, cmd.mlid);
2554
2555 out_put:
2556         mutex_unlock(&obj->mcast_lock);
2557         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
2558                                 UVERBS_LOOKUP_READ);
2559         return ret;
2560 }
2561
2562 struct ib_uflow_resources *flow_resources_alloc(size_t num_specs)
2563 {
2564         struct ib_uflow_resources *resources;
2565
2566         resources = kzalloc(sizeof(*resources), GFP_KERNEL);
2567
2568         if (!resources)
2569                 return NULL;
2570
2571         if (!num_specs)
2572                 goto out;
2573
2574         resources->counters =
2575                 kcalloc(num_specs, sizeof(*resources->counters), GFP_KERNEL);
2576         resources->collection =
2577                 kcalloc(num_specs, sizeof(*resources->collection), GFP_KERNEL);
2578
2579         if (!resources->counters || !resources->collection)
2580                 goto err;
2581
2582 out:
2583         resources->max = num_specs;
2584         return resources;
2585
2586 err:
2587         kfree(resources->counters);
2588         kfree(resources);
2589
2590         return NULL;
2591 }
2592 EXPORT_SYMBOL(flow_resources_alloc);
2593
2594 void ib_uverbs_flow_resources_free(struct ib_uflow_resources *uflow_res)
2595 {
2596         unsigned int i;
2597
2598         if (!uflow_res)
2599                 return;
2600
2601         for (i = 0; i < uflow_res->collection_num; i++)
2602                 atomic_dec(&uflow_res->collection[i]->usecnt);
2603
2604         for (i = 0; i < uflow_res->counters_num; i++)
2605                 atomic_dec(&uflow_res->counters[i]->usecnt);
2606
2607         kfree(uflow_res->collection);
2608         kfree(uflow_res->counters);
2609         kfree(uflow_res);
2610 }
2611 EXPORT_SYMBOL(ib_uverbs_flow_resources_free);
2612
2613 void flow_resources_add(struct ib_uflow_resources *uflow_res,
2614                         enum ib_flow_spec_type type,
2615                         void *ibobj)
2616 {
2617         WARN_ON(uflow_res->num >= uflow_res->max);
2618
2619         switch (type) {
2620         case IB_FLOW_SPEC_ACTION_HANDLE:
2621                 atomic_inc(&((struct ib_flow_action *)ibobj)->usecnt);
2622                 uflow_res->collection[uflow_res->collection_num++] =
2623                         (struct ib_flow_action *)ibobj;
2624                 break;
2625         case IB_FLOW_SPEC_ACTION_COUNT:
2626                 atomic_inc(&((struct ib_counters *)ibobj)->usecnt);
2627                 uflow_res->counters[uflow_res->counters_num++] =
2628                         (struct ib_counters *)ibobj;
2629                 break;
2630         default:
2631                 WARN_ON(1);
2632         }
2633
2634         uflow_res->num++;
2635 }
2636 EXPORT_SYMBOL(flow_resources_add);
2637
2638 static int kern_spec_to_ib_spec_action(struct uverbs_attr_bundle *attrs,
2639                                        struct ib_uverbs_flow_spec *kern_spec,
2640                                        union ib_flow_spec *ib_spec,
2641                                        struct ib_uflow_resources *uflow_res)
2642 {
2643         ib_spec->type = kern_spec->type;
2644         switch (ib_spec->type) {
2645         case IB_FLOW_SPEC_ACTION_TAG:
2646                 if (kern_spec->flow_tag.size !=
2647                     sizeof(struct ib_uverbs_flow_spec_action_tag))
2648                         return -EINVAL;
2649
2650                 ib_spec->flow_tag.size = sizeof(struct ib_flow_spec_action_tag);
2651                 ib_spec->flow_tag.tag_id = kern_spec->flow_tag.tag_id;
2652                 break;
2653         case IB_FLOW_SPEC_ACTION_DROP:
2654                 if (kern_spec->drop.size !=
2655                     sizeof(struct ib_uverbs_flow_spec_action_drop))
2656                         return -EINVAL;
2657
2658                 ib_spec->drop.size = sizeof(struct ib_flow_spec_action_drop);
2659                 break;
2660         case IB_FLOW_SPEC_ACTION_HANDLE:
2661                 if (kern_spec->action.size !=
2662                     sizeof(struct ib_uverbs_flow_spec_action_handle))
2663                         return -EOPNOTSUPP;
2664                 ib_spec->action.act = uobj_get_obj_read(flow_action,
2665                                                         UVERBS_OBJECT_FLOW_ACTION,
2666                                                         kern_spec->action.handle,
2667                                                         attrs);
2668                 if (!ib_spec->action.act)
2669                         return -EINVAL;
2670                 ib_spec->action.size =
2671                         sizeof(struct ib_flow_spec_action_handle);
2672                 flow_resources_add(uflow_res,
2673                                    IB_FLOW_SPEC_ACTION_HANDLE,
2674                                    ib_spec->action.act);
2675                 uobj_put_obj_read(ib_spec->action.act);
2676                 break;
2677         case IB_FLOW_SPEC_ACTION_COUNT:
2678                 if (kern_spec->flow_count.size !=
2679                         sizeof(struct ib_uverbs_flow_spec_action_count))
2680                         return -EINVAL;
2681                 ib_spec->flow_count.counters =
2682                         uobj_get_obj_read(counters,
2683                                           UVERBS_OBJECT_COUNTERS,
2684                                           kern_spec->flow_count.handle,
2685                                           attrs);
2686                 if (!ib_spec->flow_count.counters)
2687                         return -EINVAL;
2688                 ib_spec->flow_count.size =
2689                                 sizeof(struct ib_flow_spec_action_count);
2690                 flow_resources_add(uflow_res,
2691                                    IB_FLOW_SPEC_ACTION_COUNT,
2692                                    ib_spec->flow_count.counters);
2693                 uobj_put_obj_read(ib_spec->flow_count.counters);
2694                 break;
2695         default:
2696                 return -EINVAL;
2697         }
2698         return 0;
2699 }
2700
2701 static ssize_t spec_filter_size(const void *kern_spec_filter, u16 kern_filter_size,
2702                                 u16 ib_real_filter_sz)
2703 {
2704         /*
2705          * User space filter structures must be 64 bit aligned, otherwise this
2706          * may pass, but we won't handle additional new attributes.
2707          */
2708
2709         if (kern_filter_size > ib_real_filter_sz) {
2710                 if (memchr_inv(kern_spec_filter +
2711                                ib_real_filter_sz, 0,
2712                                kern_filter_size - ib_real_filter_sz))
2713                         return -EINVAL;
2714                 return ib_real_filter_sz;
2715         }
2716         return kern_filter_size;
2717 }
2718
2719 int ib_uverbs_kern_spec_to_ib_spec_filter(enum ib_flow_spec_type type,
2720                                           const void *kern_spec_mask,
2721                                           const void *kern_spec_val,
2722                                           size_t kern_filter_sz,
2723                                           union ib_flow_spec *ib_spec)
2724 {
2725         ssize_t actual_filter_sz;
2726         ssize_t ib_filter_sz;
2727
2728         /* User flow spec size must be aligned to 4 bytes */
2729         if (kern_filter_sz != ALIGN(kern_filter_sz, 4))
2730                 return -EINVAL;
2731
2732         ib_spec->type = type;
2733
2734         if (ib_spec->type == (IB_FLOW_SPEC_INNER | IB_FLOW_SPEC_VXLAN_TUNNEL))
2735                 return -EINVAL;
2736
2737         switch (ib_spec->type & ~IB_FLOW_SPEC_INNER) {
2738         case IB_FLOW_SPEC_ETH:
2739                 ib_filter_sz = offsetof(struct ib_flow_eth_filter, real_sz);
2740                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2741                                                     kern_filter_sz,
2742                                                     ib_filter_sz);
2743                 if (actual_filter_sz <= 0)
2744                         return -EINVAL;
2745                 ib_spec->size = sizeof(struct ib_flow_spec_eth);
2746                 memcpy(&ib_spec->eth.val, kern_spec_val, actual_filter_sz);
2747                 memcpy(&ib_spec->eth.mask, kern_spec_mask, actual_filter_sz);
2748                 break;
2749         case IB_FLOW_SPEC_IPV4:
2750                 ib_filter_sz = offsetof(struct ib_flow_ipv4_filter, real_sz);
2751                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2752                                                     kern_filter_sz,
2753                                                     ib_filter_sz);
2754                 if (actual_filter_sz <= 0)
2755                         return -EINVAL;
2756                 ib_spec->size = sizeof(struct ib_flow_spec_ipv4);
2757                 memcpy(&ib_spec->ipv4.val, kern_spec_val, actual_filter_sz);
2758                 memcpy(&ib_spec->ipv4.mask, kern_spec_mask, actual_filter_sz);
2759                 break;
2760         case IB_FLOW_SPEC_IPV6:
2761                 ib_filter_sz = offsetof(struct ib_flow_ipv6_filter, real_sz);
2762                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2763                                                     kern_filter_sz,
2764                                                     ib_filter_sz);
2765                 if (actual_filter_sz <= 0)
2766                         return -EINVAL;
2767                 ib_spec->size = sizeof(struct ib_flow_spec_ipv6);
2768                 memcpy(&ib_spec->ipv6.val, kern_spec_val, actual_filter_sz);
2769                 memcpy(&ib_spec->ipv6.mask, kern_spec_mask, actual_filter_sz);
2770
2771                 if ((ntohl(ib_spec->ipv6.mask.flow_label)) >= BIT(20) ||
2772                     (ntohl(ib_spec->ipv6.val.flow_label)) >= BIT(20))
2773                         return -EINVAL;
2774                 break;
2775         case IB_FLOW_SPEC_TCP:
2776         case IB_FLOW_SPEC_UDP:
2777                 ib_filter_sz = offsetof(struct ib_flow_tcp_udp_filter, real_sz);
2778                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2779                                                     kern_filter_sz,
2780                                                     ib_filter_sz);
2781                 if (actual_filter_sz <= 0)
2782                         return -EINVAL;
2783                 ib_spec->size = sizeof(struct ib_flow_spec_tcp_udp);
2784                 memcpy(&ib_spec->tcp_udp.val, kern_spec_val, actual_filter_sz);
2785                 memcpy(&ib_spec->tcp_udp.mask, kern_spec_mask, actual_filter_sz);
2786                 break;
2787         case IB_FLOW_SPEC_VXLAN_TUNNEL:
2788                 ib_filter_sz = offsetof(struct ib_flow_tunnel_filter, real_sz);
2789                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2790                                                     kern_filter_sz,
2791                                                     ib_filter_sz);
2792                 if (actual_filter_sz <= 0)
2793                         return -EINVAL;
2794                 ib_spec->tunnel.size = sizeof(struct ib_flow_spec_tunnel);
2795                 memcpy(&ib_spec->tunnel.val, kern_spec_val, actual_filter_sz);
2796                 memcpy(&ib_spec->tunnel.mask, kern_spec_mask, actual_filter_sz);
2797
2798                 if ((ntohl(ib_spec->tunnel.mask.tunnel_id)) >= BIT(24) ||
2799                     (ntohl(ib_spec->tunnel.val.tunnel_id)) >= BIT(24))
2800                         return -EINVAL;
2801                 break;
2802         case IB_FLOW_SPEC_ESP:
2803                 ib_filter_sz = offsetof(struct ib_flow_esp_filter, real_sz);
2804                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2805                                                     kern_filter_sz,
2806                                                     ib_filter_sz);
2807                 if (actual_filter_sz <= 0)
2808                         return -EINVAL;
2809                 ib_spec->esp.size = sizeof(struct ib_flow_spec_esp);
2810                 memcpy(&ib_spec->esp.val, kern_spec_val, actual_filter_sz);
2811                 memcpy(&ib_spec->esp.mask, kern_spec_mask, actual_filter_sz);
2812                 break;
2813         case IB_FLOW_SPEC_GRE:
2814                 ib_filter_sz = offsetof(struct ib_flow_gre_filter, real_sz);
2815                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2816                                                     kern_filter_sz,
2817                                                     ib_filter_sz);
2818                 if (actual_filter_sz <= 0)
2819                         return -EINVAL;
2820                 ib_spec->gre.size = sizeof(struct ib_flow_spec_gre);
2821                 memcpy(&ib_spec->gre.val, kern_spec_val, actual_filter_sz);
2822                 memcpy(&ib_spec->gre.mask, kern_spec_mask, actual_filter_sz);
2823                 break;
2824         case IB_FLOW_SPEC_MPLS:
2825                 ib_filter_sz = offsetof(struct ib_flow_mpls_filter, real_sz);
2826                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2827                                                     kern_filter_sz,
2828                                                     ib_filter_sz);
2829                 if (actual_filter_sz <= 0)
2830                         return -EINVAL;
2831                 ib_spec->mpls.size = sizeof(struct ib_flow_spec_mpls);
2832                 memcpy(&ib_spec->mpls.val, kern_spec_val, actual_filter_sz);
2833                 memcpy(&ib_spec->mpls.mask, kern_spec_mask, actual_filter_sz);
2834                 break;
2835         default:
2836                 return -EINVAL;
2837         }
2838         return 0;
2839 }
2840
2841 static int kern_spec_to_ib_spec_filter(struct ib_uverbs_flow_spec *kern_spec,
2842                                        union ib_flow_spec *ib_spec)
2843 {
2844         size_t kern_filter_sz;
2845         void *kern_spec_mask;
2846         void *kern_spec_val;
2847
2848         if (check_sub_overflow((size_t)kern_spec->hdr.size,
2849                                sizeof(struct ib_uverbs_flow_spec_hdr),
2850                                &kern_filter_sz))
2851                 return -EINVAL;
2852
2853         kern_filter_sz /= 2;
2854
2855         kern_spec_val = (void *)kern_spec +
2856                 sizeof(struct ib_uverbs_flow_spec_hdr);
2857         kern_spec_mask = kern_spec_val + kern_filter_sz;
2858
2859         return ib_uverbs_kern_spec_to_ib_spec_filter(kern_spec->type,
2860                                                      kern_spec_mask,
2861                                                      kern_spec_val,
2862                                                      kern_filter_sz, ib_spec);
2863 }
2864
2865 static int kern_spec_to_ib_spec(struct uverbs_attr_bundle *attrs,
2866                                 struct ib_uverbs_flow_spec *kern_spec,
2867                                 union ib_flow_spec *ib_spec,
2868                                 struct ib_uflow_resources *uflow_res)
2869 {
2870         if (kern_spec->reserved)
2871                 return -EINVAL;
2872
2873         if (kern_spec->type >= IB_FLOW_SPEC_ACTION_TAG)
2874                 return kern_spec_to_ib_spec_action(attrs, kern_spec, ib_spec,
2875                                                    uflow_res);
2876         else
2877                 return kern_spec_to_ib_spec_filter(kern_spec, ib_spec);
2878 }
2879
2880 static int ib_uverbs_ex_create_wq(struct uverbs_attr_bundle *attrs)
2881 {
2882         struct ib_uverbs_ex_create_wq cmd;
2883         struct ib_uverbs_ex_create_wq_resp resp = {};
2884         struct ib_uwq_object           *obj;
2885         int err = 0;
2886         struct ib_cq *cq;
2887         struct ib_pd *pd;
2888         struct ib_wq *wq;
2889         struct ib_wq_init_attr wq_init_attr = {};
2890         struct ib_device *ib_dev;
2891
2892         err = uverbs_request(attrs, &cmd, sizeof(cmd));
2893         if (err)
2894                 return err;
2895
2896         if (cmd.comp_mask)
2897                 return -EOPNOTSUPP;
2898
2899         obj = (struct ib_uwq_object *)uobj_alloc(UVERBS_OBJECT_WQ, attrs,
2900                                                  &ib_dev);
2901         if (IS_ERR(obj))
2902                 return PTR_ERR(obj);
2903
2904         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
2905         if (!pd) {
2906                 err = -EINVAL;
2907                 goto err_uobj;
2908         }
2909
2910         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
2911         if (!cq) {
2912                 err = -EINVAL;
2913                 goto err_put_pd;
2914         }
2915
2916         wq_init_attr.cq = cq;
2917         wq_init_attr.max_sge = cmd.max_sge;
2918         wq_init_attr.max_wr = cmd.max_wr;
2919         wq_init_attr.wq_type = cmd.wq_type;
2920         wq_init_attr.event_handler = ib_uverbs_wq_event_handler;
2921         wq_init_attr.create_flags = cmd.create_flags;
2922         INIT_LIST_HEAD(&obj->uevent.event_list);
2923         obj->uevent.uobject.user_handle = cmd.user_handle;
2924
2925         wq = pd->device->ops.create_wq(pd, &wq_init_attr, &attrs->driver_udata);
2926         if (IS_ERR(wq)) {
2927                 err = PTR_ERR(wq);
2928                 goto err_put_cq;
2929         }
2930
2931         wq->uobject = obj;
2932         obj->uevent.uobject.object = wq;
2933         wq->wq_type = wq_init_attr.wq_type;
2934         wq->cq = cq;
2935         wq->pd = pd;
2936         wq->device = pd->device;
2937         atomic_set(&wq->usecnt, 0);
2938         atomic_inc(&pd->usecnt);
2939         atomic_inc(&cq->usecnt);
2940         obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file);
2941         if (obj->uevent.event_file)
2942                 uverbs_uobject_get(&obj->uevent.event_file->uobj);
2943
2944         uobj_put_obj_read(pd);
2945         rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
2946                                 UVERBS_LOOKUP_READ);
2947         uobj_finalize_uobj_create(&obj->uevent.uobject, attrs);
2948
2949         resp.wq_handle = obj->uevent.uobject.id;
2950         resp.max_sge = wq_init_attr.max_sge;
2951         resp.max_wr = wq_init_attr.max_wr;
2952         resp.wqn = wq->wq_num;
2953         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
2954         return uverbs_response(attrs, &resp, sizeof(resp));
2955
2956 err_put_cq:
2957         rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
2958                                 UVERBS_LOOKUP_READ);
2959 err_put_pd:
2960         uobj_put_obj_read(pd);
2961 err_uobj:
2962         uobj_alloc_abort(&obj->uevent.uobject, attrs);
2963
2964         return err;
2965 }
2966
2967 static int ib_uverbs_ex_destroy_wq(struct uverbs_attr_bundle *attrs)
2968 {
2969         struct ib_uverbs_ex_destroy_wq  cmd;
2970         struct ib_uverbs_ex_destroy_wq_resp     resp = {};
2971         struct ib_uobject               *uobj;
2972         struct ib_uwq_object            *obj;
2973         int                             ret;
2974
2975         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2976         if (ret)
2977                 return ret;
2978
2979         if (cmd.comp_mask)
2980                 return -EOPNOTSUPP;
2981
2982         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
2983         uobj = uobj_get_destroy(UVERBS_OBJECT_WQ, cmd.wq_handle, attrs);
2984         if (IS_ERR(uobj))
2985                 return PTR_ERR(uobj);
2986
2987         obj = container_of(uobj, struct ib_uwq_object, uevent.uobject);
2988         resp.events_reported = obj->uevent.events_reported;
2989
2990         uobj_put_destroy(uobj);
2991
2992         return uverbs_response(attrs, &resp, sizeof(resp));
2993 }
2994
2995 static int ib_uverbs_ex_modify_wq(struct uverbs_attr_bundle *attrs)
2996 {
2997         struct ib_uverbs_ex_modify_wq cmd;
2998         struct ib_wq *wq;
2999         struct ib_wq_attr wq_attr = {};
3000         int ret;
3001
3002         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3003         if (ret)
3004                 return ret;
3005
3006         if (!cmd.attr_mask)
3007                 return -EINVAL;
3008
3009         if (cmd.attr_mask > (IB_WQ_STATE | IB_WQ_CUR_STATE | IB_WQ_FLAGS))
3010                 return -EINVAL;
3011
3012         wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ, cmd.wq_handle, attrs);
3013         if (!wq)
3014                 return -EINVAL;
3015
3016         if (cmd.attr_mask & IB_WQ_FLAGS) {
3017                 wq_attr.flags = cmd.flags;
3018                 wq_attr.flags_mask = cmd.flags_mask;
3019         }
3020
3021         if (cmd.attr_mask & IB_WQ_CUR_STATE) {
3022                 if (cmd.curr_wq_state > IB_WQS_ERR)
3023                         return -EINVAL;
3024
3025                 wq_attr.curr_wq_state = cmd.curr_wq_state;
3026         } else {
3027                 wq_attr.curr_wq_state = wq->state;
3028         }
3029
3030         if (cmd.attr_mask & IB_WQ_STATE) {
3031                 if (cmd.wq_state > IB_WQS_ERR)
3032                         return -EINVAL;
3033
3034                 wq_attr.wq_state = cmd.wq_state;
3035         } else {
3036                 wq_attr.wq_state = wq_attr.curr_wq_state;
3037         }
3038
3039         ret = wq->device->ops.modify_wq(wq, &wq_attr, cmd.attr_mask,
3040                                         &attrs->driver_udata);
3041         rdma_lookup_put_uobject(&wq->uobject->uevent.uobject,
3042                                 UVERBS_LOOKUP_READ);
3043         return ret;
3044 }
3045
3046 static int ib_uverbs_ex_create_rwq_ind_table(struct uverbs_attr_bundle *attrs)
3047 {
3048         struct ib_uverbs_ex_create_rwq_ind_table cmd;
3049         struct ib_uverbs_ex_create_rwq_ind_table_resp  resp = {};
3050         struct ib_uobject *uobj;
3051         int err;
3052         struct ib_rwq_ind_table_init_attr init_attr = {};
3053         struct ib_rwq_ind_table *rwq_ind_tbl;
3054         struct ib_wq **wqs = NULL;
3055         u32 *wqs_handles = NULL;
3056         struct ib_wq    *wq = NULL;
3057         int i, num_read_wqs;
3058         u32 num_wq_handles;
3059         struct uverbs_req_iter iter;
3060         struct ib_device *ib_dev;
3061
3062         err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
3063         if (err)
3064                 return err;
3065
3066         if (cmd.comp_mask)
3067                 return -EOPNOTSUPP;
3068
3069         if (cmd.log_ind_tbl_size > IB_USER_VERBS_MAX_LOG_IND_TBL_SIZE)
3070                 return -EINVAL;
3071
3072         num_wq_handles = 1 << cmd.log_ind_tbl_size;
3073         wqs_handles = kcalloc(num_wq_handles, sizeof(*wqs_handles),
3074                               GFP_KERNEL);
3075         if (!wqs_handles)
3076                 return -ENOMEM;
3077
3078         err = uverbs_request_next(&iter, wqs_handles,
3079                                   num_wq_handles * sizeof(__u32));
3080         if (err)
3081                 goto err_free;
3082
3083         err = uverbs_request_finish(&iter);
3084         if (err)
3085                 goto err_free;
3086
3087         wqs = kcalloc(num_wq_handles, sizeof(*wqs), GFP_KERNEL);
3088         if (!wqs) {
3089                 err = -ENOMEM;
3090                 goto  err_free;
3091         }
3092
3093         for (num_read_wqs = 0; num_read_wqs < num_wq_handles;
3094                         num_read_wqs++) {
3095                 wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ,
3096                                        wqs_handles[num_read_wqs], attrs);
3097                 if (!wq) {
3098                         err = -EINVAL;
3099                         goto put_wqs;
3100                 }
3101
3102                 wqs[num_read_wqs] = wq;
3103                 atomic_inc(&wqs[num_read_wqs]->usecnt);
3104         }
3105
3106         uobj = uobj_alloc(UVERBS_OBJECT_RWQ_IND_TBL, attrs, &ib_dev);
3107         if (IS_ERR(uobj)) {
3108                 err = PTR_ERR(uobj);
3109                 goto put_wqs;
3110         }
3111
3112         rwq_ind_tbl = rdma_zalloc_drv_obj(ib_dev, ib_rwq_ind_table);
3113         if (!rwq_ind_tbl) {
3114                 err = -ENOMEM;
3115                 goto err_uobj;
3116         }
3117
3118         init_attr.log_ind_tbl_size = cmd.log_ind_tbl_size;
3119         init_attr.ind_tbl = wqs;
3120
3121         rwq_ind_tbl->ind_tbl = wqs;
3122         rwq_ind_tbl->log_ind_tbl_size = init_attr.log_ind_tbl_size;
3123         rwq_ind_tbl->uobject = uobj;
3124         uobj->object = rwq_ind_tbl;
3125         rwq_ind_tbl->device = ib_dev;
3126         atomic_set(&rwq_ind_tbl->usecnt, 0);
3127
3128         err = ib_dev->ops.create_rwq_ind_table(rwq_ind_tbl, &init_attr,
3129                                                &attrs->driver_udata);
3130         if (err)
3131                 goto err_create;
3132
3133         for (i = 0; i < num_wq_handles; i++)
3134                 rdma_lookup_put_uobject(&wqs[i]->uobject->uevent.uobject,
3135                                         UVERBS_LOOKUP_READ);
3136         kfree(wqs_handles);
3137         uobj_finalize_uobj_create(uobj, attrs);
3138
3139         resp.ind_tbl_handle = uobj->id;
3140         resp.ind_tbl_num = rwq_ind_tbl->ind_tbl_num;
3141         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
3142         return uverbs_response(attrs, &resp, sizeof(resp));
3143
3144 err_create:
3145         kfree(rwq_ind_tbl);
3146 err_uobj:
3147         uobj_alloc_abort(uobj, attrs);
3148 put_wqs:
3149         for (i = 0; i < num_read_wqs; i++) {
3150                 rdma_lookup_put_uobject(&wqs[i]->uobject->uevent.uobject,
3151                                         UVERBS_LOOKUP_READ);
3152                 atomic_dec(&wqs[i]->usecnt);
3153         }
3154 err_free:
3155         kfree(wqs_handles);
3156         kfree(wqs);
3157         return err;
3158 }
3159
3160 static int ib_uverbs_ex_destroy_rwq_ind_table(struct uverbs_attr_bundle *attrs)
3161 {
3162         struct ib_uverbs_ex_destroy_rwq_ind_table cmd;
3163         int ret;
3164
3165         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3166         if (ret)
3167                 return ret;
3168
3169         if (cmd.comp_mask)
3170                 return -EOPNOTSUPP;
3171
3172         return uobj_perform_destroy(UVERBS_OBJECT_RWQ_IND_TBL,
3173                                     cmd.ind_tbl_handle, attrs);
3174 }
3175
3176 static int ib_uverbs_ex_create_flow(struct uverbs_attr_bundle *attrs)
3177 {
3178         struct ib_uverbs_create_flow      cmd;
3179         struct ib_uverbs_create_flow_resp resp = {};
3180         struct ib_uobject                 *uobj;
3181         struct ib_flow                    *flow_id;
3182         struct ib_uverbs_flow_attr        *kern_flow_attr;
3183         struct ib_flow_attr               *flow_attr;
3184         struct ib_qp                      *qp;
3185         struct ib_uflow_resources         *uflow_res;
3186         struct ib_uverbs_flow_spec_hdr    *kern_spec;
3187         struct uverbs_req_iter iter;
3188         int err;
3189         void *ib_spec;
3190         int i;
3191         struct ib_device *ib_dev;
3192
3193         err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
3194         if (err)
3195                 return err;
3196
3197         if (cmd.comp_mask)
3198                 return -EINVAL;
3199
3200         if (!capable(CAP_NET_RAW))
3201                 return -EPERM;
3202
3203         if (cmd.flow_attr.flags >= IB_FLOW_ATTR_FLAGS_RESERVED)
3204                 return -EINVAL;
3205
3206         if ((cmd.flow_attr.flags & IB_FLOW_ATTR_FLAGS_DONT_TRAP) &&
3207             ((cmd.flow_attr.type == IB_FLOW_ATTR_ALL_DEFAULT) ||
3208              (cmd.flow_attr.type == IB_FLOW_ATTR_MC_DEFAULT)))
3209                 return -EINVAL;
3210
3211         if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS)
3212                 return -EINVAL;
3213
3214         if (cmd.flow_attr.size >
3215             (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec)))
3216                 return -EINVAL;
3217
3218         if (cmd.flow_attr.reserved[0] ||
3219             cmd.flow_attr.reserved[1])
3220                 return -EINVAL;
3221
3222         if (cmd.flow_attr.num_of_specs) {
3223                 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size,
3224                                          GFP_KERNEL);
3225                 if (!kern_flow_attr)
3226                         return -ENOMEM;
3227
3228                 *kern_flow_attr = cmd.flow_attr;
3229                 err = uverbs_request_next(&iter, &kern_flow_attr->flow_specs,
3230                                           cmd.flow_attr.size);
3231                 if (err)
3232                         goto err_free_attr;
3233         } else {
3234                 kern_flow_attr = &cmd.flow_attr;
3235         }
3236
3237         err = uverbs_request_finish(&iter);
3238         if (err)
3239                 goto err_free_attr;
3240
3241         uobj = uobj_alloc(UVERBS_OBJECT_FLOW, attrs, &ib_dev);
3242         if (IS_ERR(uobj)) {
3243                 err = PTR_ERR(uobj);
3244                 goto err_free_attr;
3245         }
3246
3247         if (!rdma_is_port_valid(uobj->context->device, cmd.flow_attr.port)) {
3248                 err = -EINVAL;
3249                 goto err_uobj;
3250         }
3251
3252         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
3253         if (!qp) {
3254                 err = -EINVAL;
3255                 goto err_uobj;
3256         }
3257
3258         if (qp->qp_type != IB_QPT_UD && qp->qp_type != IB_QPT_RAW_PACKET) {
3259                 err = -EINVAL;
3260                 goto err_put;
3261         }
3262
3263         flow_attr = kzalloc(struct_size(flow_attr, flows,
3264                                 cmd.flow_attr.num_of_specs), GFP_KERNEL);
3265         if (!flow_attr) {
3266                 err = -ENOMEM;
3267                 goto err_put;
3268         }
3269         uflow_res = flow_resources_alloc(cmd.flow_attr.num_of_specs);
3270         if (!uflow_res) {
3271                 err = -ENOMEM;
3272                 goto err_free_flow_attr;
3273         }
3274
3275         flow_attr->type = kern_flow_attr->type;
3276         flow_attr->priority = kern_flow_attr->priority;
3277         flow_attr->num_of_specs = kern_flow_attr->num_of_specs;
3278         flow_attr->port = kern_flow_attr->port;
3279         flow_attr->flags = kern_flow_attr->flags;
3280         flow_attr->size = sizeof(*flow_attr);
3281
3282         kern_spec = kern_flow_attr->flow_specs;
3283         ib_spec = flow_attr + 1;
3284         for (i = 0; i < flow_attr->num_of_specs &&
3285                         cmd.flow_attr.size >= sizeof(*kern_spec) &&
3286                         cmd.flow_attr.size >= kern_spec->size;
3287              i++) {
3288                 err = kern_spec_to_ib_spec(
3289                                 attrs, (struct ib_uverbs_flow_spec *)kern_spec,
3290                                 ib_spec, uflow_res);
3291                 if (err)
3292                         goto err_free;
3293
3294                 flow_attr->size +=
3295                         ((union ib_flow_spec *) ib_spec)->size;
3296                 cmd.flow_attr.size -= kern_spec->size;
3297                 kern_spec = ((void *)kern_spec) + kern_spec->size;
3298                 ib_spec += ((union ib_flow_spec *) ib_spec)->size;
3299         }
3300         if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) {
3301                 pr_warn("create flow failed, flow %d: %u bytes left from uverb cmd\n",
3302                         i, cmd.flow_attr.size);
3303                 err = -EINVAL;
3304                 goto err_free;
3305         }
3306
3307         flow_id = qp->device->ops.create_flow(qp, flow_attr,
3308                                               &attrs->driver_udata);
3309
3310         if (IS_ERR(flow_id)) {
3311                 err = PTR_ERR(flow_id);
3312                 goto err_free;
3313         }
3314
3315         ib_set_flow(uobj, flow_id, qp, qp->device, uflow_res);
3316
3317         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
3318                                 UVERBS_LOOKUP_READ);
3319         kfree(flow_attr);
3320
3321         if (cmd.flow_attr.num_of_specs)
3322                 kfree(kern_flow_attr);
3323         uobj_finalize_uobj_create(uobj, attrs);
3324
3325         resp.flow_handle = uobj->id;
3326         return uverbs_response(attrs, &resp, sizeof(resp));
3327
3328 err_free:
3329         ib_uverbs_flow_resources_free(uflow_res);
3330 err_free_flow_attr:
3331         kfree(flow_attr);
3332 err_put:
3333         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
3334                                 UVERBS_LOOKUP_READ);
3335 err_uobj:
3336         uobj_alloc_abort(uobj, attrs);
3337 err_free_attr:
3338         if (cmd.flow_attr.num_of_specs)
3339                 kfree(kern_flow_attr);
3340         return err;
3341 }
3342
3343 static int ib_uverbs_ex_destroy_flow(struct uverbs_attr_bundle *attrs)
3344 {
3345         struct ib_uverbs_destroy_flow   cmd;
3346         int                             ret;
3347
3348         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3349         if (ret)
3350                 return ret;
3351
3352         if (cmd.comp_mask)
3353                 return -EINVAL;
3354
3355         return uobj_perform_destroy(UVERBS_OBJECT_FLOW, cmd.flow_handle, attrs);
3356 }
3357
3358 static int __uverbs_create_xsrq(struct uverbs_attr_bundle *attrs,
3359                                 struct ib_uverbs_create_xsrq *cmd,
3360                                 struct ib_udata *udata)
3361 {
3362         struct ib_uverbs_create_srq_resp resp = {};
3363         struct ib_usrq_object           *obj;
3364         struct ib_pd                    *pd;
3365         struct ib_srq                   *srq;
3366         struct ib_srq_init_attr          attr;
3367         int ret;
3368         struct ib_uobject *xrcd_uobj;
3369         struct ib_device *ib_dev;
3370
3371         obj = (struct ib_usrq_object *)uobj_alloc(UVERBS_OBJECT_SRQ, attrs,
3372                                                   &ib_dev);
3373         if (IS_ERR(obj))
3374                 return PTR_ERR(obj);
3375
3376         if (cmd->srq_type == IB_SRQT_TM)
3377                 attr.ext.tag_matching.max_num_tags = cmd->max_num_tags;
3378
3379         if (cmd->srq_type == IB_SRQT_XRC) {
3380                 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->xrcd_handle,
3381                                           attrs);
3382                 if (IS_ERR(xrcd_uobj)) {
3383                         ret = -EINVAL;
3384                         goto err;
3385                 }
3386
3387                 attr.ext.xrc.xrcd = (struct ib_xrcd *)xrcd_uobj->object;
3388                 if (!attr.ext.xrc.xrcd) {
3389                         ret = -EINVAL;
3390                         goto err_put_xrcd;
3391                 }
3392
3393                 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
3394                 atomic_inc(&obj->uxrcd->refcnt);
3395         }
3396
3397         if (ib_srq_has_cq(cmd->srq_type)) {
3398                 attr.ext.cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ,
3399                                                 cmd->cq_handle, attrs);
3400                 if (!attr.ext.cq) {
3401                         ret = -EINVAL;
3402                         goto err_put_xrcd;
3403                 }
3404         }
3405
3406         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle, attrs);
3407         if (!pd) {
3408                 ret = -EINVAL;
3409                 goto err_put_cq;
3410         }
3411
3412         attr.event_handler  = ib_uverbs_srq_event_handler;
3413         attr.srq_type       = cmd->srq_type;
3414         attr.attr.max_wr    = cmd->max_wr;
3415         attr.attr.max_sge   = cmd->max_sge;
3416         attr.attr.srq_limit = cmd->srq_limit;
3417
3418         INIT_LIST_HEAD(&obj->uevent.event_list);
3419         obj->uevent.uobject.user_handle = cmd->user_handle;
3420
3421         srq = ib_create_srq_user(pd, &attr, obj, udata);
3422         if (IS_ERR(srq)) {
3423                 ret = PTR_ERR(srq);
3424                 goto err_put_pd;
3425         }
3426
3427         obj->uevent.uobject.object = srq;
3428         obj->uevent.uobject.user_handle = cmd->user_handle;
3429         obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file);
3430         if (obj->uevent.event_file)
3431                 uverbs_uobject_get(&obj->uevent.event_file->uobj);
3432
3433         if (cmd->srq_type == IB_SRQT_XRC)
3434                 resp.srqn = srq->ext.xrc.srq_num;
3435
3436         if (cmd->srq_type == IB_SRQT_XRC)
3437                 uobj_put_read(xrcd_uobj);
3438
3439         if (ib_srq_has_cq(cmd->srq_type))
3440                 rdma_lookup_put_uobject(&attr.ext.cq->uobject->uevent.uobject,
3441                                         UVERBS_LOOKUP_READ);
3442
3443         uobj_put_obj_read(pd);
3444         uobj_finalize_uobj_create(&obj->uevent.uobject, attrs);
3445
3446         resp.srq_handle = obj->uevent.uobject.id;
3447         resp.max_wr = attr.attr.max_wr;
3448         resp.max_sge = attr.attr.max_sge;
3449         return uverbs_response(attrs, &resp, sizeof(resp));
3450
3451 err_put_pd:
3452         uobj_put_obj_read(pd);
3453 err_put_cq:
3454         if (ib_srq_has_cq(cmd->srq_type))
3455                 rdma_lookup_put_uobject(&attr.ext.cq->uobject->uevent.uobject,
3456                                         UVERBS_LOOKUP_READ);
3457
3458 err_put_xrcd:
3459         if (cmd->srq_type == IB_SRQT_XRC) {
3460                 atomic_dec(&obj->uxrcd->refcnt);
3461                 uobj_put_read(xrcd_uobj);
3462         }
3463
3464 err:
3465         uobj_alloc_abort(&obj->uevent.uobject, attrs);
3466         return ret;
3467 }
3468
3469 static int ib_uverbs_create_srq(struct uverbs_attr_bundle *attrs)
3470 {
3471         struct ib_uverbs_create_srq      cmd;
3472         struct ib_uverbs_create_xsrq     xcmd;
3473         int ret;
3474
3475         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3476         if (ret)
3477                 return ret;
3478
3479         memset(&xcmd, 0, sizeof(xcmd));
3480         xcmd.response    = cmd.response;
3481         xcmd.user_handle = cmd.user_handle;
3482         xcmd.srq_type    = IB_SRQT_BASIC;
3483         xcmd.pd_handle   = cmd.pd_handle;
3484         xcmd.max_wr      = cmd.max_wr;
3485         xcmd.max_sge     = cmd.max_sge;
3486         xcmd.srq_limit   = cmd.srq_limit;
3487
3488         return __uverbs_create_xsrq(attrs, &xcmd, &attrs->driver_udata);
3489 }
3490
3491 static int ib_uverbs_create_xsrq(struct uverbs_attr_bundle *attrs)
3492 {
3493         struct ib_uverbs_create_xsrq     cmd;
3494         int ret;
3495
3496         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3497         if (ret)
3498                 return ret;
3499
3500         return __uverbs_create_xsrq(attrs, &cmd, &attrs->driver_udata);
3501 }
3502
3503 static int ib_uverbs_modify_srq(struct uverbs_attr_bundle *attrs)
3504 {
3505         struct ib_uverbs_modify_srq cmd;
3506         struct ib_srq              *srq;
3507         struct ib_srq_attr          attr;
3508         int                         ret;
3509
3510         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3511         if (ret)
3512                 return ret;
3513
3514         srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
3515         if (!srq)
3516                 return -EINVAL;
3517
3518         attr.max_wr    = cmd.max_wr;
3519         attr.srq_limit = cmd.srq_limit;
3520
3521         ret = srq->device->ops.modify_srq(srq, &attr, cmd.attr_mask,
3522                                           &attrs->driver_udata);
3523
3524         rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
3525                                 UVERBS_LOOKUP_READ);
3526
3527         return ret;
3528 }
3529
3530 static int ib_uverbs_query_srq(struct uverbs_attr_bundle *attrs)
3531 {
3532         struct ib_uverbs_query_srq      cmd;
3533         struct ib_uverbs_query_srq_resp resp;
3534         struct ib_srq_attr              attr;
3535         struct ib_srq                   *srq;
3536         int                             ret;
3537
3538         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3539         if (ret)
3540                 return ret;
3541
3542         srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
3543         if (!srq)
3544                 return -EINVAL;
3545
3546         ret = ib_query_srq(srq, &attr);
3547
3548         rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
3549                                 UVERBS_LOOKUP_READ);
3550
3551         if (ret)
3552                 return ret;
3553
3554         memset(&resp, 0, sizeof resp);
3555
3556         resp.max_wr    = attr.max_wr;
3557         resp.max_sge   = attr.max_sge;
3558         resp.srq_limit = attr.srq_limit;
3559
3560         return uverbs_response(attrs, &resp, sizeof(resp));
3561 }
3562
3563 static int ib_uverbs_destroy_srq(struct uverbs_attr_bundle *attrs)
3564 {
3565         struct ib_uverbs_destroy_srq      cmd;
3566         struct ib_uverbs_destroy_srq_resp resp;
3567         struct ib_uobject                *uobj;
3568         struct ib_uevent_object          *obj;
3569         int ret;
3570
3571         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3572         if (ret)
3573                 return ret;
3574
3575         uobj = uobj_get_destroy(UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
3576         if (IS_ERR(uobj))
3577                 return PTR_ERR(uobj);
3578
3579         obj = container_of(uobj, struct ib_uevent_object, uobject);
3580         memset(&resp, 0, sizeof(resp));
3581         resp.events_reported = obj->events_reported;
3582
3583         uobj_put_destroy(uobj);
3584
3585         return uverbs_response(attrs, &resp, sizeof(resp));
3586 }
3587
3588 static int ib_uverbs_ex_query_device(struct uverbs_attr_bundle *attrs)
3589 {
3590         struct ib_uverbs_ex_query_device_resp resp = {};
3591         struct ib_uverbs_ex_query_device  cmd;
3592         struct ib_device_attr attr = {0};
3593         struct ib_ucontext *ucontext;
3594         struct ib_device *ib_dev;
3595         int err;
3596
3597         ucontext = ib_uverbs_get_ucontext(attrs);
3598         if (IS_ERR(ucontext))
3599                 return PTR_ERR(ucontext);
3600         ib_dev = ucontext->device;
3601
3602         err = uverbs_request(attrs, &cmd, sizeof(cmd));
3603         if (err)
3604                 return err;
3605
3606         if (cmd.comp_mask)
3607                 return -EINVAL;
3608
3609         if (cmd.reserved)
3610                 return -EINVAL;
3611
3612         err = ib_dev->ops.query_device(ib_dev, &attr, &attrs->driver_udata);
3613         if (err)
3614                 return err;
3615
3616         copy_query_dev_fields(ucontext, &resp.base, &attr);
3617
3618         resp.odp_caps.general_caps = attr.odp_caps.general_caps;
3619         resp.odp_caps.per_transport_caps.rc_odp_caps =
3620                 attr.odp_caps.per_transport_caps.rc_odp_caps;
3621         resp.odp_caps.per_transport_caps.uc_odp_caps =
3622                 attr.odp_caps.per_transport_caps.uc_odp_caps;
3623         resp.odp_caps.per_transport_caps.ud_odp_caps =
3624                 attr.odp_caps.per_transport_caps.ud_odp_caps;
3625         resp.xrc_odp_caps = attr.odp_caps.per_transport_caps.xrc_odp_caps;
3626
3627         resp.timestamp_mask = attr.timestamp_mask;
3628         resp.hca_core_clock = attr.hca_core_clock;
3629         resp.device_cap_flags_ex = attr.device_cap_flags;
3630         resp.rss_caps.supported_qpts = attr.rss_caps.supported_qpts;
3631         resp.rss_caps.max_rwq_indirection_tables =
3632                 attr.rss_caps.max_rwq_indirection_tables;
3633         resp.rss_caps.max_rwq_indirection_table_size =
3634                 attr.rss_caps.max_rwq_indirection_table_size;
3635         resp.max_wq_type_rq = attr.max_wq_type_rq;
3636         resp.raw_packet_caps = attr.raw_packet_caps;
3637         resp.tm_caps.max_rndv_hdr_size  = attr.tm_caps.max_rndv_hdr_size;
3638         resp.tm_caps.max_num_tags       = attr.tm_caps.max_num_tags;
3639         resp.tm_caps.max_ops            = attr.tm_caps.max_ops;
3640         resp.tm_caps.max_sge            = attr.tm_caps.max_sge;
3641         resp.tm_caps.flags              = attr.tm_caps.flags;
3642         resp.cq_moderation_caps.max_cq_moderation_count  =
3643                 attr.cq_caps.max_cq_moderation_count;
3644         resp.cq_moderation_caps.max_cq_moderation_period =
3645                 attr.cq_caps.max_cq_moderation_period;
3646         resp.max_dm_size = attr.max_dm_size;
3647         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
3648
3649         return uverbs_response(attrs, &resp, sizeof(resp));
3650 }
3651
3652 static int ib_uverbs_ex_modify_cq(struct uverbs_attr_bundle *attrs)
3653 {
3654         struct ib_uverbs_ex_modify_cq cmd;
3655         struct ib_cq *cq;
3656         int ret;
3657
3658         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3659         if (ret)
3660                 return ret;
3661
3662         if (!cmd.attr_mask || cmd.reserved)
3663                 return -EINVAL;
3664
3665         if (cmd.attr_mask > IB_CQ_MODERATE)
3666                 return -EOPNOTSUPP;
3667
3668         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
3669         if (!cq)
3670                 return -EINVAL;
3671
3672         ret = rdma_set_cq_moderation(cq, cmd.attr.cq_count, cmd.attr.cq_period);
3673
3674         rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
3675                                 UVERBS_LOOKUP_READ);
3676         return ret;
3677 }
3678
3679 /*
3680  * Describe the input structs for write(). Some write methods have an input
3681  * only struct, most have an input and output. If the struct has an output then
3682  * the 'response' u64 must be the first field in the request structure.
3683  *
3684  * If udata is present then both the request and response structs have a
3685  * trailing driver_data flex array. In this case the size of the base struct
3686  * cannot be changed.
3687  */
3688 #define UAPI_DEF_WRITE_IO(req, resp)                                           \
3689         .write.has_resp = 1 +                                                  \
3690                           BUILD_BUG_ON_ZERO(offsetof(req, response) != 0) +    \
3691                           BUILD_BUG_ON_ZERO(sizeof_field(req, response) !=    \
3692                                             sizeof(u64)),                      \
3693         .write.req_size = sizeof(req), .write.resp_size = sizeof(resp)
3694
3695 #define UAPI_DEF_WRITE_I(req) .write.req_size = sizeof(req)
3696
3697 #define UAPI_DEF_WRITE_UDATA_IO(req, resp)                                     \
3698         UAPI_DEF_WRITE_IO(req, resp),                                          \
3699                 .write.has_udata =                                             \
3700                         1 +                                                    \
3701                         BUILD_BUG_ON_ZERO(offsetof(req, driver_data) !=        \
3702                                           sizeof(req)) +                       \
3703                         BUILD_BUG_ON_ZERO(offsetof(resp, driver_data) !=       \
3704                                           sizeof(resp))
3705
3706 #define UAPI_DEF_WRITE_UDATA_I(req)                                            \
3707         UAPI_DEF_WRITE_I(req),                                                 \
3708                 .write.has_udata =                                             \
3709                         1 + BUILD_BUG_ON_ZERO(offsetof(req, driver_data) !=    \
3710                                               sizeof(req))
3711
3712 /*
3713  * The _EX versions are for use with WRITE_EX and allow the last struct member
3714  * to be specified. Buffers that do not include that member will be rejected.
3715  */
3716 #define UAPI_DEF_WRITE_IO_EX(req, req_last_member, resp, resp_last_member)     \
3717         .write.has_resp = 1,                                                   \
3718         .write.req_size = offsetofend(req, req_last_member),                   \
3719         .write.resp_size = offsetofend(resp, resp_last_member)
3720
3721 #define UAPI_DEF_WRITE_I_EX(req, req_last_member)                              \
3722         .write.req_size = offsetofend(req, req_last_member)
3723
3724 const struct uapi_definition uverbs_def_write_intf[] = {
3725         DECLARE_UVERBS_OBJECT(
3726                 UVERBS_OBJECT_AH,
3727                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_AH,
3728                                      ib_uverbs_create_ah,
3729                                      UAPI_DEF_WRITE_UDATA_IO(
3730                                              struct ib_uverbs_create_ah,
3731                                              struct ib_uverbs_create_ah_resp)),
3732                 DECLARE_UVERBS_WRITE(
3733                         IB_USER_VERBS_CMD_DESTROY_AH,
3734                         ib_uverbs_destroy_ah,
3735                         UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_ah)),
3736                 UAPI_DEF_OBJ_NEEDS_FN(create_user_ah),
3737                 UAPI_DEF_OBJ_NEEDS_FN(destroy_ah)),
3738
3739         DECLARE_UVERBS_OBJECT(
3740                 UVERBS_OBJECT_COMP_CHANNEL,
3741                 DECLARE_UVERBS_WRITE(
3742                         IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL,
3743                         ib_uverbs_create_comp_channel,
3744                         UAPI_DEF_WRITE_IO(
3745                                 struct ib_uverbs_create_comp_channel,
3746                                 struct ib_uverbs_create_comp_channel_resp))),
3747
3748         DECLARE_UVERBS_OBJECT(
3749                 UVERBS_OBJECT_CQ,
3750                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_CQ,
3751                                      ib_uverbs_create_cq,
3752                                      UAPI_DEF_WRITE_UDATA_IO(
3753                                              struct ib_uverbs_create_cq,
3754                                              struct ib_uverbs_create_cq_resp),
3755                                      UAPI_DEF_METHOD_NEEDS_FN(create_cq)),
3756                 DECLARE_UVERBS_WRITE(
3757                         IB_USER_VERBS_CMD_DESTROY_CQ,
3758                         ib_uverbs_destroy_cq,
3759                         UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_cq,
3760                                           struct ib_uverbs_destroy_cq_resp),
3761                         UAPI_DEF_METHOD_NEEDS_FN(destroy_cq)),
3762                 DECLARE_UVERBS_WRITE(
3763                         IB_USER_VERBS_CMD_POLL_CQ,
3764                         ib_uverbs_poll_cq,
3765                         UAPI_DEF_WRITE_IO(struct ib_uverbs_poll_cq,
3766                                           struct ib_uverbs_poll_cq_resp),
3767                         UAPI_DEF_METHOD_NEEDS_FN(poll_cq)),
3768                 DECLARE_UVERBS_WRITE(
3769                         IB_USER_VERBS_CMD_REQ_NOTIFY_CQ,
3770                         ib_uverbs_req_notify_cq,
3771                         UAPI_DEF_WRITE_I(struct ib_uverbs_req_notify_cq),
3772                         UAPI_DEF_METHOD_NEEDS_FN(req_notify_cq)),
3773                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_RESIZE_CQ,
3774                                      ib_uverbs_resize_cq,
3775                                      UAPI_DEF_WRITE_UDATA_IO(
3776                                              struct ib_uverbs_resize_cq,
3777                                              struct ib_uverbs_resize_cq_resp),
3778                                      UAPI_DEF_METHOD_NEEDS_FN(resize_cq)),
3779                 DECLARE_UVERBS_WRITE_EX(
3780                         IB_USER_VERBS_EX_CMD_CREATE_CQ,
3781                         ib_uverbs_ex_create_cq,
3782                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_cq,
3783                                              reserved,
3784                                              struct ib_uverbs_ex_create_cq_resp,
3785                                              response_length),
3786                         UAPI_DEF_METHOD_NEEDS_FN(create_cq)),
3787                 DECLARE_UVERBS_WRITE_EX(
3788                         IB_USER_VERBS_EX_CMD_MODIFY_CQ,
3789                         ib_uverbs_ex_modify_cq,
3790                         UAPI_DEF_WRITE_I(struct ib_uverbs_ex_modify_cq),
3791                         UAPI_DEF_METHOD_NEEDS_FN(modify_cq))),
3792
3793         DECLARE_UVERBS_OBJECT(
3794                 UVERBS_OBJECT_DEVICE,
3795                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_GET_CONTEXT,
3796                                      ib_uverbs_get_context,
3797                                      UAPI_DEF_WRITE_UDATA_IO(
3798                                              struct ib_uverbs_get_context,
3799                                              struct ib_uverbs_get_context_resp)),
3800                 DECLARE_UVERBS_WRITE(
3801                         IB_USER_VERBS_CMD_QUERY_DEVICE,
3802                         ib_uverbs_query_device,
3803                         UAPI_DEF_WRITE_IO(struct ib_uverbs_query_device,
3804                                           struct ib_uverbs_query_device_resp)),
3805                 DECLARE_UVERBS_WRITE(
3806                         IB_USER_VERBS_CMD_QUERY_PORT,
3807                         ib_uverbs_query_port,
3808                         UAPI_DEF_WRITE_IO(struct ib_uverbs_query_port,
3809                                           struct ib_uverbs_query_port_resp),
3810                         UAPI_DEF_METHOD_NEEDS_FN(query_port)),
3811                 DECLARE_UVERBS_WRITE_EX(
3812                         IB_USER_VERBS_EX_CMD_QUERY_DEVICE,
3813                         ib_uverbs_ex_query_device,
3814                         UAPI_DEF_WRITE_IO_EX(
3815                                 struct ib_uverbs_ex_query_device,
3816                                 reserved,
3817                                 struct ib_uverbs_ex_query_device_resp,
3818                                 response_length),
3819                         UAPI_DEF_METHOD_NEEDS_FN(query_device)),
3820                 UAPI_DEF_OBJ_NEEDS_FN(alloc_ucontext),
3821                 UAPI_DEF_OBJ_NEEDS_FN(dealloc_ucontext)),
3822
3823         DECLARE_UVERBS_OBJECT(
3824                 UVERBS_OBJECT_FLOW,
3825                 DECLARE_UVERBS_WRITE_EX(
3826                         IB_USER_VERBS_EX_CMD_CREATE_FLOW,
3827                         ib_uverbs_ex_create_flow,
3828                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_create_flow,
3829                                              flow_attr,
3830                                              struct ib_uverbs_create_flow_resp,
3831                                              flow_handle),
3832                         UAPI_DEF_METHOD_NEEDS_FN(create_flow)),
3833                 DECLARE_UVERBS_WRITE_EX(
3834                         IB_USER_VERBS_EX_CMD_DESTROY_FLOW,
3835                         ib_uverbs_ex_destroy_flow,
3836                         UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_flow),
3837                         UAPI_DEF_METHOD_NEEDS_FN(destroy_flow))),
3838
3839         DECLARE_UVERBS_OBJECT(
3840                 UVERBS_OBJECT_MR,
3841                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_DEREG_MR,
3842                                      ib_uverbs_dereg_mr,
3843                                      UAPI_DEF_WRITE_I(struct ib_uverbs_dereg_mr),
3844                                      UAPI_DEF_METHOD_NEEDS_FN(dereg_mr)),
3845                 DECLARE_UVERBS_WRITE(
3846                         IB_USER_VERBS_CMD_REG_MR,
3847                         ib_uverbs_reg_mr,
3848                         UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_reg_mr,
3849                                                 struct ib_uverbs_reg_mr_resp),
3850                         UAPI_DEF_METHOD_NEEDS_FN(reg_user_mr)),
3851                 DECLARE_UVERBS_WRITE(
3852                         IB_USER_VERBS_CMD_REREG_MR,
3853                         ib_uverbs_rereg_mr,
3854                         UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_rereg_mr,
3855                                                 struct ib_uverbs_rereg_mr_resp),
3856                         UAPI_DEF_METHOD_NEEDS_FN(rereg_user_mr))),
3857
3858         DECLARE_UVERBS_OBJECT(
3859                 UVERBS_OBJECT_MW,
3860                 DECLARE_UVERBS_WRITE(
3861                         IB_USER_VERBS_CMD_ALLOC_MW,
3862                         ib_uverbs_alloc_mw,
3863                         UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_mw,
3864                                                 struct ib_uverbs_alloc_mw_resp),
3865                         UAPI_DEF_METHOD_NEEDS_FN(alloc_mw)),
3866                 DECLARE_UVERBS_WRITE(
3867                         IB_USER_VERBS_CMD_DEALLOC_MW,
3868                         ib_uverbs_dealloc_mw,
3869                         UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_mw),
3870                         UAPI_DEF_METHOD_NEEDS_FN(dealloc_mw))),
3871
3872         DECLARE_UVERBS_OBJECT(
3873                 UVERBS_OBJECT_PD,
3874                 DECLARE_UVERBS_WRITE(
3875                         IB_USER_VERBS_CMD_ALLOC_PD,
3876                         ib_uverbs_alloc_pd,
3877                         UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_pd,
3878                                                 struct ib_uverbs_alloc_pd_resp),
3879                         UAPI_DEF_METHOD_NEEDS_FN(alloc_pd)),
3880                 DECLARE_UVERBS_WRITE(
3881                         IB_USER_VERBS_CMD_DEALLOC_PD,
3882                         ib_uverbs_dealloc_pd,
3883                         UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_pd),
3884                         UAPI_DEF_METHOD_NEEDS_FN(dealloc_pd))),
3885
3886         DECLARE_UVERBS_OBJECT(
3887                 UVERBS_OBJECT_QP,
3888                 DECLARE_UVERBS_WRITE(
3889                         IB_USER_VERBS_CMD_ATTACH_MCAST,
3890                         ib_uverbs_attach_mcast,
3891                         UAPI_DEF_WRITE_I(struct ib_uverbs_attach_mcast),
3892                         UAPI_DEF_METHOD_NEEDS_FN(attach_mcast),
3893                         UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)),
3894                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_QP,
3895                                      ib_uverbs_create_qp,
3896                                      UAPI_DEF_WRITE_UDATA_IO(
3897                                              struct ib_uverbs_create_qp,
3898                                              struct ib_uverbs_create_qp_resp),
3899                                      UAPI_DEF_METHOD_NEEDS_FN(create_qp)),
3900                 DECLARE_UVERBS_WRITE(
3901                         IB_USER_VERBS_CMD_DESTROY_QP,
3902                         ib_uverbs_destroy_qp,
3903                         UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_qp,
3904                                           struct ib_uverbs_destroy_qp_resp),
3905                         UAPI_DEF_METHOD_NEEDS_FN(destroy_qp)),
3906                 DECLARE_UVERBS_WRITE(
3907                         IB_USER_VERBS_CMD_DETACH_MCAST,
3908                         ib_uverbs_detach_mcast,
3909                         UAPI_DEF_WRITE_I(struct ib_uverbs_detach_mcast),
3910                         UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)),
3911                 DECLARE_UVERBS_WRITE(
3912                         IB_USER_VERBS_CMD_MODIFY_QP,
3913                         ib_uverbs_modify_qp,
3914                         UAPI_DEF_WRITE_I(struct ib_uverbs_modify_qp),
3915                         UAPI_DEF_METHOD_NEEDS_FN(modify_qp)),
3916                 DECLARE_UVERBS_WRITE(
3917                         IB_USER_VERBS_CMD_POST_RECV,
3918                         ib_uverbs_post_recv,
3919                         UAPI_DEF_WRITE_IO(struct ib_uverbs_post_recv,
3920                                           struct ib_uverbs_post_recv_resp),
3921                         UAPI_DEF_METHOD_NEEDS_FN(post_recv)),
3922                 DECLARE_UVERBS_WRITE(
3923                         IB_USER_VERBS_CMD_POST_SEND,
3924                         ib_uverbs_post_send,
3925                         UAPI_DEF_WRITE_IO(struct ib_uverbs_post_send,
3926                                           struct ib_uverbs_post_send_resp),
3927                         UAPI_DEF_METHOD_NEEDS_FN(post_send)),
3928                 DECLARE_UVERBS_WRITE(
3929                         IB_USER_VERBS_CMD_QUERY_QP,
3930                         ib_uverbs_query_qp,
3931                         UAPI_DEF_WRITE_IO(struct ib_uverbs_query_qp,
3932                                           struct ib_uverbs_query_qp_resp),
3933                         UAPI_DEF_METHOD_NEEDS_FN(query_qp)),
3934                 DECLARE_UVERBS_WRITE_EX(
3935                         IB_USER_VERBS_EX_CMD_CREATE_QP,
3936                         ib_uverbs_ex_create_qp,
3937                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_qp,
3938                                              comp_mask,
3939                                              struct ib_uverbs_ex_create_qp_resp,
3940                                              response_length),
3941                         UAPI_DEF_METHOD_NEEDS_FN(create_qp)),
3942                 DECLARE_UVERBS_WRITE_EX(
3943                         IB_USER_VERBS_EX_CMD_MODIFY_QP,
3944                         ib_uverbs_ex_modify_qp,
3945                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_modify_qp,
3946                                              base,
3947                                              struct ib_uverbs_ex_modify_qp_resp,
3948                                              response_length),
3949                         UAPI_DEF_METHOD_NEEDS_FN(modify_qp))),
3950
3951         DECLARE_UVERBS_OBJECT(
3952                 UVERBS_OBJECT_RWQ_IND_TBL,
3953                 DECLARE_UVERBS_WRITE_EX(
3954                         IB_USER_VERBS_EX_CMD_CREATE_RWQ_IND_TBL,
3955                         ib_uverbs_ex_create_rwq_ind_table,
3956                         UAPI_DEF_WRITE_IO_EX(
3957                                 struct ib_uverbs_ex_create_rwq_ind_table,
3958                                 log_ind_tbl_size,
3959                                 struct ib_uverbs_ex_create_rwq_ind_table_resp,
3960                                 ind_tbl_num),
3961                         UAPI_DEF_METHOD_NEEDS_FN(create_rwq_ind_table)),
3962                 DECLARE_UVERBS_WRITE_EX(
3963                         IB_USER_VERBS_EX_CMD_DESTROY_RWQ_IND_TBL,
3964                         ib_uverbs_ex_destroy_rwq_ind_table,
3965                         UAPI_DEF_WRITE_I(
3966                                 struct ib_uverbs_ex_destroy_rwq_ind_table),
3967                         UAPI_DEF_METHOD_NEEDS_FN(destroy_rwq_ind_table))),
3968
3969         DECLARE_UVERBS_OBJECT(
3970                 UVERBS_OBJECT_WQ,
3971                 DECLARE_UVERBS_WRITE_EX(
3972                         IB_USER_VERBS_EX_CMD_CREATE_WQ,
3973                         ib_uverbs_ex_create_wq,
3974                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_wq,
3975                                              max_sge,
3976                                              struct ib_uverbs_ex_create_wq_resp,
3977                                              wqn),
3978                         UAPI_DEF_METHOD_NEEDS_FN(create_wq)),
3979                 DECLARE_UVERBS_WRITE_EX(
3980                         IB_USER_VERBS_EX_CMD_DESTROY_WQ,
3981                         ib_uverbs_ex_destroy_wq,
3982                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_destroy_wq,
3983                                              wq_handle,
3984                                              struct ib_uverbs_ex_destroy_wq_resp,
3985                                              reserved),
3986                         UAPI_DEF_METHOD_NEEDS_FN(destroy_wq)),
3987                 DECLARE_UVERBS_WRITE_EX(
3988                         IB_USER_VERBS_EX_CMD_MODIFY_WQ,
3989                         ib_uverbs_ex_modify_wq,
3990                         UAPI_DEF_WRITE_I_EX(struct ib_uverbs_ex_modify_wq,
3991                                             curr_wq_state),
3992                         UAPI_DEF_METHOD_NEEDS_FN(modify_wq))),
3993
3994         DECLARE_UVERBS_OBJECT(
3995                 UVERBS_OBJECT_SRQ,
3996                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_SRQ,
3997                                      ib_uverbs_create_srq,
3998                                      UAPI_DEF_WRITE_UDATA_IO(
3999                                              struct ib_uverbs_create_srq,
4000                                              struct ib_uverbs_create_srq_resp),
4001                                      UAPI_DEF_METHOD_NEEDS_FN(create_srq)),
4002                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_XSRQ,
4003                                      ib_uverbs_create_xsrq,
4004                                      UAPI_DEF_WRITE_UDATA_IO(
4005                                              struct ib_uverbs_create_xsrq,
4006                                              struct ib_uverbs_create_srq_resp),
4007                                      UAPI_DEF_METHOD_NEEDS_FN(create_srq)),
4008                 DECLARE_UVERBS_WRITE(
4009                         IB_USER_VERBS_CMD_DESTROY_SRQ,
4010                         ib_uverbs_destroy_srq,
4011                         UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_srq,
4012                                           struct ib_uverbs_destroy_srq_resp),
4013                         UAPI_DEF_METHOD_NEEDS_FN(destroy_srq)),
4014                 DECLARE_UVERBS_WRITE(
4015                         IB_USER_VERBS_CMD_MODIFY_SRQ,
4016                         ib_uverbs_modify_srq,
4017                         UAPI_DEF_WRITE_UDATA_I(struct ib_uverbs_modify_srq),
4018                         UAPI_DEF_METHOD_NEEDS_FN(modify_srq)),
4019                 DECLARE_UVERBS_WRITE(
4020                         IB_USER_VERBS_CMD_POST_SRQ_RECV,
4021                         ib_uverbs_post_srq_recv,
4022                         UAPI_DEF_WRITE_IO(struct ib_uverbs_post_srq_recv,
4023                                           struct ib_uverbs_post_srq_recv_resp),
4024                         UAPI_DEF_METHOD_NEEDS_FN(post_srq_recv)),
4025                 DECLARE_UVERBS_WRITE(
4026                         IB_USER_VERBS_CMD_QUERY_SRQ,
4027                         ib_uverbs_query_srq,
4028                         UAPI_DEF_WRITE_IO(struct ib_uverbs_query_srq,
4029                                           struct ib_uverbs_query_srq_resp),
4030                         UAPI_DEF_METHOD_NEEDS_FN(query_srq))),
4031
4032         DECLARE_UVERBS_OBJECT(
4033                 UVERBS_OBJECT_XRCD,
4034                 DECLARE_UVERBS_WRITE(
4035                         IB_USER_VERBS_CMD_CLOSE_XRCD,
4036                         ib_uverbs_close_xrcd,
4037                         UAPI_DEF_WRITE_I(struct ib_uverbs_close_xrcd)),
4038                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_QP,
4039                                      ib_uverbs_open_qp,
4040                                      UAPI_DEF_WRITE_UDATA_IO(
4041                                              struct ib_uverbs_open_qp,
4042                                              struct ib_uverbs_create_qp_resp)),
4043                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_XRCD,
4044                                      ib_uverbs_open_xrcd,
4045                                      UAPI_DEF_WRITE_UDATA_IO(
4046                                              struct ib_uverbs_open_xrcd,
4047                                              struct ib_uverbs_open_xrcd_resp)),
4048                 UAPI_DEF_OBJ_NEEDS_FN(alloc_xrcd),
4049                 UAPI_DEF_OBJ_NEEDS_FN(dealloc_xrcd)),
4050
4051         {},
4052 };