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
 743         rdma_restrack_new(&mr->res, RDMA_RESTRACK_MR);
 744         rdma_restrack_set_name(&mr->res, NULL);
 745         rdma_restrack_add(&mr->res);
 746
 747         uobj->object = mr;
 748         uobj_put_obj_read(pd);
 749         uobj_finalize_uobj_create(uobj, attrs);
 750
 751         resp.lkey = mr->lkey;
 752         resp.rkey = mr->rkey;
 753         resp.mr_handle = uobj->id;
 754         return uverbs_response(attrs, &resp, sizeof(resp));
 755
 756 err_put:
 757         uobj_put_obj_read(pd);
 758 err_free:
 759         uobj_alloc_abort(uobj, attrs);
 760         return ret;
 761 }
 762
 763 static int ib_uverbs_rereg_mr(struct uverbs_attr_bundle *attrs)
 764 {
 765         struct ib_uverbs_rereg_mr      cmd;
 766         struct ib_uverbs_rereg_mr_resp resp;
 767         struct ib_mr                *mr;
 768         int                          ret;
 769         struct ib_uobject           *uobj;
 770         struct ib_uobject *new_uobj;
 771         struct ib_device *ib_dev;
 772         struct ib_pd *orig_pd;
 773         struct ib_pd *new_pd;
 774         struct ib_mr *new_mr;
 775
 776         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 777         if (ret)
 778                 return ret;
 779
 780         if (!cmd.flags)
 781                 return -EINVAL;
 782
 783         if (cmd.flags & ~IB_MR_REREG_SUPPORTED)
 784                 return -EOPNOTSUPP;
 785
 786         if ((cmd.flags & IB_MR_REREG_TRANS) &&
 787             (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
 788                 return -EINVAL;
 789
 790         uobj = uobj_get_write(UVERBS_OBJECT_MR, cmd.mr_handle, attrs);
 791         if (IS_ERR(uobj))
 792                 return PTR_ERR(uobj);
 793
 794         mr = uobj->object;
 795
 796         if (mr->dm) {
 797                 ret = -EINVAL;
 798                 goto put_uobjs;
 799         }
 800
 801         if (cmd.flags & IB_MR_REREG_ACCESS) {
 802                 ret = ib_check_mr_access(mr->device, cmd.access_flags);
 803                 if (ret)
 804                         goto put_uobjs;
 805         }
 806
 807         orig_pd = mr->pd;
 808         if (cmd.flags & IB_MR_REREG_PD) {
 809                 new_pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle,
 810                                            attrs);
 811                 if (!new_pd) {
 812                         ret = -EINVAL;
 813                         goto put_uobjs;
 814                 }
 815         } else {
 816                 new_pd = mr->pd;
 817         }
 818
 819         /*
 820          * The driver might create a new HW object as part of the rereg, we need
 821          * to have a uobject ready to hold it.
 822          */
 823         new_uobj = uobj_alloc(UVERBS_OBJECT_MR, attrs, &ib_dev);
 824         if (IS_ERR(new_uobj)) {
 825                 ret = PTR_ERR(new_uobj);
 826                 goto put_uobj_pd;
 827         }
 828
 829         new_mr = ib_dev->ops.rereg_user_mr(mr, cmd.flags, cmd.start, cmd.length,
 830                                            cmd.hca_va, cmd.access_flags, new_pd,
 831                                            &attrs->driver_udata);
 832         if (IS_ERR(new_mr)) {
 833                 ret = PTR_ERR(new_mr);
 834                 goto put_new_uobj;
 835         }
 836         if (new_mr) {
 837                 new_mr->device = new_pd->device;
 838                 new_mr->pd = new_pd;
 839                 new_mr->type = IB_MR_TYPE_USER;
 840                 new_mr->dm = NULL;
 841                 new_mr->sig_attrs = NULL;
 842                 new_mr->uobject = uobj;
 843                 atomic_inc(&new_pd->usecnt);
 844                 new_mr->iova = cmd.hca_va;
 845                 new_uobj->object = new_mr;
 846
 847                 rdma_restrack_new(&new_mr->res, RDMA_RESTRACK_MR);
 848                 rdma_restrack_set_name(&new_mr->res, NULL);
 849                 rdma_restrack_add(&new_mr->res);
 850
 851                 /*
 852                  * The new uobj for the new HW object is put into the same spot
 853                  * in the IDR and the old uobj & HW object is deleted.
 854                  */
 855                 rdma_assign_uobject(uobj, new_uobj, attrs);
 856                 rdma_alloc_commit_uobject(new_uobj, attrs);
 857                 uobj_put_destroy(uobj);
 858                 new_uobj = NULL;
 859                 uobj = NULL;
 860                 mr = new_mr;
 861         } else {
 862                 if (cmd.flags & IB_MR_REREG_PD) {
 863                         atomic_dec(&orig_pd->usecnt);
 864                         mr->pd = new_pd;
 865                         atomic_inc(&new_pd->usecnt);
 866                 }
 867                 if (cmd.flags & IB_MR_REREG_TRANS)
 868                         mr->iova = cmd.hca_va;
 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         attr.create_flags  = 0;
1406
1407         attr.cap.max_send_wr     = cmd->max_send_wr;
1408         attr.cap.max_recv_wr     = cmd->max_recv_wr;
1409         attr.cap.max_send_sge    = cmd->max_send_sge;
1410         attr.cap.max_recv_sge    = cmd->max_recv_sge;
1411         attr.cap.max_inline_data = cmd->max_inline_data;
1412
1413         INIT_LIST_HEAD(&obj->uevent.event_list);
1414         INIT_LIST_HEAD(&obj->mcast_list);
1415
1416         attr.create_flags = cmd->create_flags;
1417         if (attr.create_flags & ~(IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK |
1418                                 IB_QP_CREATE_CROSS_CHANNEL |
1419                                 IB_QP_CREATE_MANAGED_SEND |
1420                                 IB_QP_CREATE_MANAGED_RECV |
1421                                 IB_QP_CREATE_SCATTER_FCS |
1422                                 IB_QP_CREATE_CVLAN_STRIPPING |
1423                                 IB_QP_CREATE_SOURCE_QPN |
1424                                 IB_QP_CREATE_PCI_WRITE_END_PADDING)) {
1425                 ret = -EINVAL;
1426                 goto err_put;
1427         }
1428
1429         if (attr.create_flags & IB_QP_CREATE_SOURCE_QPN) {
1430                 if (!capable(CAP_NET_RAW)) {
1431                         ret = -EPERM;
1432                         goto err_put;
1433                 }
1434
1435                 attr.source_qpn = cmd->source_qpn;
1436         }
1437
1438         if (cmd->qp_type == IB_QPT_XRC_TGT)
1439                 qp = ib_create_qp(pd, &attr);
1440         else
1441                 qp = _ib_create_qp(device, pd, &attr, &attrs->driver_udata, obj,
1442                                    NULL);
1443
1444         if (IS_ERR(qp)) {
1445                 ret = PTR_ERR(qp);
1446                 goto err_put;
1447         }
1448
1449         if (cmd->qp_type != IB_QPT_XRC_TGT) {
1450                 ret = ib_create_qp_security(qp, device);
1451                 if (ret)
1452                         goto err_cb;
1453
1454                 atomic_inc(&pd->usecnt);
1455                 if (attr.send_cq)
1456                         atomic_inc(&attr.send_cq->usecnt);
1457                 if (attr.recv_cq)
1458                         atomic_inc(&attr.recv_cq->usecnt);
1459                 if (attr.srq)
1460                         atomic_inc(&attr.srq->usecnt);
1461                 if (ind_tbl)
1462                         atomic_inc(&ind_tbl->usecnt);
1463         } else {
1464                 /* It is done in _ib_create_qp for other QP types */
1465                 qp->uobject = obj;
1466         }
1467
1468         obj->uevent.uobject.object = qp;
1469         obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file);
1470         if (obj->uevent.event_file)
1471                 uverbs_uobject_get(&obj->uevent.event_file->uobj);
1472
1473         if (xrcd) {
1474                 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object,
1475                                           uobject);
1476                 atomic_inc(&obj->uxrcd->refcnt);
1477                 uobj_put_read(xrcd_uobj);
1478         }
1479
1480         if (pd)
1481                 uobj_put_obj_read(pd);
1482         if (scq)
1483                 rdma_lookup_put_uobject(&scq->uobject->uevent.uobject,
1484                                         UVERBS_LOOKUP_READ);
1485         if (rcq && rcq != scq)
1486                 rdma_lookup_put_uobject(&rcq->uobject->uevent.uobject,
1487                                         UVERBS_LOOKUP_READ);
1488         if (srq)
1489                 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
1490                                         UVERBS_LOOKUP_READ);
1491         if (ind_tbl)
1492                 uobj_put_obj_read(ind_tbl);
1493         uobj_finalize_uobj_create(&obj->uevent.uobject, attrs);
1494
1495         resp.base.qpn             = qp->qp_num;
1496         resp.base.qp_handle       = obj->uevent.uobject.id;
1497         resp.base.max_recv_sge    = attr.cap.max_recv_sge;
1498         resp.base.max_send_sge    = attr.cap.max_send_sge;
1499         resp.base.max_recv_wr     = attr.cap.max_recv_wr;
1500         resp.base.max_send_wr     = attr.cap.max_send_wr;
1501         resp.base.max_inline_data = attr.cap.max_inline_data;
1502         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
1503         return uverbs_response(attrs, &resp, sizeof(resp));
1504
1505 err_cb:
1506         ib_destroy_qp_user(qp, uverbs_get_cleared_udata(attrs));
1507
1508 err_put:
1509         if (!IS_ERR(xrcd_uobj))
1510                 uobj_put_read(xrcd_uobj);
1511         if (pd)
1512                 uobj_put_obj_read(pd);
1513         if (scq)
1514                 rdma_lookup_put_uobject(&scq->uobject->uevent.uobject,
1515                                         UVERBS_LOOKUP_READ);
1516         if (rcq && rcq != scq)
1517                 rdma_lookup_put_uobject(&rcq->uobject->uevent.uobject,
1518                                         UVERBS_LOOKUP_READ);
1519         if (srq)
1520                 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
1521                                         UVERBS_LOOKUP_READ);
1522         if (ind_tbl)
1523                 uobj_put_obj_read(ind_tbl);
1524
1525         uobj_alloc_abort(&obj->uevent.uobject, attrs);
1526         return ret;
1527 }
1528
1529 static int ib_uverbs_create_qp(struct uverbs_attr_bundle *attrs)
1530 {
1531         struct ib_uverbs_create_qp      cmd;
1532         struct ib_uverbs_ex_create_qp   cmd_ex;
1533         int ret;
1534
1535         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1536         if (ret)
1537                 return ret;
1538
1539         memset(&cmd_ex, 0, sizeof(cmd_ex));
1540         cmd_ex.user_handle = cmd.user_handle;
1541         cmd_ex.pd_handle = cmd.pd_handle;
1542         cmd_ex.send_cq_handle = cmd.send_cq_handle;
1543         cmd_ex.recv_cq_handle = cmd.recv_cq_handle;
1544         cmd_ex.srq_handle = cmd.srq_handle;
1545         cmd_ex.max_send_wr = cmd.max_send_wr;
1546         cmd_ex.max_recv_wr = cmd.max_recv_wr;
1547         cmd_ex.max_send_sge = cmd.max_send_sge;
1548         cmd_ex.max_recv_sge = cmd.max_recv_sge;
1549         cmd_ex.max_inline_data = cmd.max_inline_data;
1550         cmd_ex.sq_sig_all = cmd.sq_sig_all;
1551         cmd_ex.qp_type = cmd.qp_type;
1552         cmd_ex.is_srq = cmd.is_srq;
1553
1554         return create_qp(attrs, &cmd_ex);
1555 }
1556
1557 static int ib_uverbs_ex_create_qp(struct uverbs_attr_bundle *attrs)
1558 {
1559         struct ib_uverbs_ex_create_qp cmd;
1560         int ret;
1561
1562         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1563         if (ret)
1564                 return ret;
1565
1566         if (cmd.comp_mask & ~IB_UVERBS_CREATE_QP_SUP_COMP_MASK)
1567                 return -EINVAL;
1568
1569         if (cmd.reserved)
1570                 return -EINVAL;
1571
1572         return create_qp(attrs, &cmd);
1573 }
1574
1575 static int ib_uverbs_open_qp(struct uverbs_attr_bundle *attrs)
1576 {
1577         struct ib_uverbs_create_qp_resp resp = {};
1578         struct ib_uverbs_open_qp        cmd;
1579         struct ib_uqp_object           *obj;
1580         struct ib_xrcd                 *xrcd;
1581         struct ib_qp                   *qp;
1582         struct ib_qp_open_attr          attr = {};
1583         int ret;
1584         struct ib_uobject *xrcd_uobj;
1585         struct ib_device *ib_dev;
1586
1587         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1588         if (ret)
1589                 return ret;
1590
1591         obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs,
1592                                                  &ib_dev);
1593         if (IS_ERR(obj))
1594                 return PTR_ERR(obj);
1595
1596         xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd.pd_handle, attrs);
1597         if (IS_ERR(xrcd_uobj)) {
1598                 ret = -EINVAL;
1599                 goto err_put;
1600         }
1601
1602         xrcd = (struct ib_xrcd *)xrcd_uobj->object;
1603         if (!xrcd) {
1604                 ret = -EINVAL;
1605                 goto err_xrcd;
1606         }
1607
1608         attr.event_handler = ib_uverbs_qp_event_handler;
1609         attr.qp_num        = cmd.qpn;
1610         attr.qp_type       = cmd.qp_type;
1611
1612         INIT_LIST_HEAD(&obj->uevent.event_list);
1613         INIT_LIST_HEAD(&obj->mcast_list);
1614
1615         qp = ib_open_qp(xrcd, &attr);
1616         if (IS_ERR(qp)) {
1617                 ret = PTR_ERR(qp);
1618                 goto err_xrcd;
1619         }
1620
1621         obj->uevent.uobject.object = qp;
1622         obj->uevent.uobject.user_handle = cmd.user_handle;
1623
1624         obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
1625         atomic_inc(&obj->uxrcd->refcnt);
1626         qp->uobject = obj;
1627         uobj_put_read(xrcd_uobj);
1628         uobj_finalize_uobj_create(&obj->uevent.uobject, attrs);
1629
1630         resp.qpn = qp->qp_num;
1631         resp.qp_handle = obj->uevent.uobject.id;
1632         return uverbs_response(attrs, &resp, sizeof(resp));
1633
1634 err_xrcd:
1635         uobj_put_read(xrcd_uobj);
1636 err_put:
1637         uobj_alloc_abort(&obj->uevent.uobject, attrs);
1638         return ret;
1639 }
1640
1641 static void copy_ah_attr_to_uverbs(struct ib_uverbs_qp_dest *uverb_attr,
1642                                    struct rdma_ah_attr *rdma_attr)
1643 {
1644         const struct ib_global_route   *grh;
1645
1646         uverb_attr->dlid              = rdma_ah_get_dlid(rdma_attr);
1647         uverb_attr->sl                = rdma_ah_get_sl(rdma_attr);
1648         uverb_attr->src_path_bits     = rdma_ah_get_path_bits(rdma_attr);
1649         uverb_attr->static_rate       = rdma_ah_get_static_rate(rdma_attr);
1650         uverb_attr->is_global         = !!(rdma_ah_get_ah_flags(rdma_attr) &
1651                                          IB_AH_GRH);
1652         if (uverb_attr->is_global) {
1653                 grh = rdma_ah_read_grh(rdma_attr);
1654                 memcpy(uverb_attr->dgid, grh->dgid.raw, 16);
1655                 uverb_attr->flow_label        = grh->flow_label;
1656                 uverb_attr->sgid_index        = grh->sgid_index;
1657                 uverb_attr->hop_limit         = grh->hop_limit;
1658                 uverb_attr->traffic_class     = grh->traffic_class;
1659         }
1660         uverb_attr->port_num          = rdma_ah_get_port_num(rdma_attr);
1661 }
1662
1663 static int ib_uverbs_query_qp(struct uverbs_attr_bundle *attrs)
1664 {
1665         struct ib_uverbs_query_qp      cmd;
1666         struct ib_uverbs_query_qp_resp resp;
1667         struct ib_qp                   *qp;
1668         struct ib_qp_attr              *attr;
1669         struct ib_qp_init_attr         *init_attr;
1670         int                            ret;
1671
1672         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1673         if (ret)
1674                 return ret;
1675
1676         attr      = kmalloc(sizeof *attr, GFP_KERNEL);
1677         init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1678         if (!attr || !init_attr) {
1679                 ret = -ENOMEM;
1680                 goto out;
1681         }
1682
1683         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
1684         if (!qp) {
1685                 ret = -EINVAL;
1686                 goto out;
1687         }
1688
1689         ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1690
1691         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
1692                                 UVERBS_LOOKUP_READ);
1693
1694         if (ret)
1695                 goto out;
1696
1697         memset(&resp, 0, sizeof resp);
1698
1699         resp.qp_state               = attr->qp_state;
1700         resp.cur_qp_state           = attr->cur_qp_state;
1701         resp.path_mtu               = attr->path_mtu;
1702         resp.path_mig_state         = attr->path_mig_state;
1703         resp.qkey                   = attr->qkey;
1704         resp.rq_psn                 = attr->rq_psn;
1705         resp.sq_psn                 = attr->sq_psn;
1706         resp.dest_qp_num            = attr->dest_qp_num;
1707         resp.qp_access_flags        = attr->qp_access_flags;
1708         resp.pkey_index             = attr->pkey_index;
1709         resp.alt_pkey_index         = attr->alt_pkey_index;
1710         resp.sq_draining            = attr->sq_draining;
1711         resp.max_rd_atomic          = attr->max_rd_atomic;
1712         resp.max_dest_rd_atomic     = attr->max_dest_rd_atomic;
1713         resp.min_rnr_timer          = attr->min_rnr_timer;
1714         resp.port_num               = attr->port_num;
1715         resp.timeout                = attr->timeout;
1716         resp.retry_cnt              = attr->retry_cnt;
1717         resp.rnr_retry              = attr->rnr_retry;
1718         resp.alt_port_num           = attr->alt_port_num;
1719         resp.alt_timeout            = attr->alt_timeout;
1720
1721         copy_ah_attr_to_uverbs(&resp.dest, &attr->ah_attr);
1722         copy_ah_attr_to_uverbs(&resp.alt_dest, &attr->alt_ah_attr);
1723
1724         resp.max_send_wr            = init_attr->cap.max_send_wr;
1725         resp.max_recv_wr            = init_attr->cap.max_recv_wr;
1726         resp.max_send_sge           = init_attr->cap.max_send_sge;
1727         resp.max_recv_sge           = init_attr->cap.max_recv_sge;
1728         resp.max_inline_data        = init_attr->cap.max_inline_data;
1729         resp.sq_sig_all             = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1730
1731         ret = uverbs_response(attrs, &resp, sizeof(resp));
1732
1733 out:
1734         kfree(attr);
1735         kfree(init_attr);
1736
1737         return ret;
1738 }
1739
1740 /* Remove ignored fields set in the attribute mask */
1741 static int modify_qp_mask(enum ib_qp_type qp_type, int mask)
1742 {
1743         switch (qp_type) {
1744         case IB_QPT_XRC_INI:
1745                 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER);
1746         case IB_QPT_XRC_TGT:
1747                 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT |
1748                                 IB_QP_RNR_RETRY);
1749         default:
1750                 return mask;
1751         }
1752 }
1753
1754 static void copy_ah_attr_from_uverbs(struct ib_device *dev,
1755                                      struct rdma_ah_attr *rdma_attr,
1756                                      struct ib_uverbs_qp_dest *uverb_attr)
1757 {
1758         rdma_attr->type = rdma_ah_find_type(dev, uverb_attr->port_num);
1759         if (uverb_attr->is_global) {
1760                 rdma_ah_set_grh(rdma_attr, NULL,
1761                                 uverb_attr->flow_label,
1762                                 uverb_attr->sgid_index,
1763                                 uverb_attr->hop_limit,
1764                                 uverb_attr->traffic_class);
1765                 rdma_ah_set_dgid_raw(rdma_attr, uverb_attr->dgid);
1766         } else {
1767                 rdma_ah_set_ah_flags(rdma_attr, 0);
1768         }
1769         rdma_ah_set_dlid(rdma_attr, uverb_attr->dlid);
1770         rdma_ah_set_sl(rdma_attr, uverb_attr->sl);
1771         rdma_ah_set_path_bits(rdma_attr, uverb_attr->src_path_bits);
1772         rdma_ah_set_static_rate(rdma_attr, uverb_attr->static_rate);
1773         rdma_ah_set_port_num(rdma_attr, uverb_attr->port_num);
1774         rdma_ah_set_make_grd(rdma_attr, false);
1775 }
1776
1777 static int modify_qp(struct uverbs_attr_bundle *attrs,
1778                      struct ib_uverbs_ex_modify_qp *cmd)
1779 {
1780         struct ib_qp_attr *attr;
1781         struct ib_qp *qp;
1782         int ret;
1783
1784         attr = kzalloc(sizeof(*attr), GFP_KERNEL);
1785         if (!attr)
1786                 return -ENOMEM;
1787
1788         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd->base.qp_handle,
1789                                attrs);
1790         if (!qp) {
1791                 ret = -EINVAL;
1792                 goto out;
1793         }
1794
1795         if ((cmd->base.attr_mask & IB_QP_PORT) &&
1796             !rdma_is_port_valid(qp->device, cmd->base.port_num)) {
1797                 ret = -EINVAL;
1798                 goto release_qp;
1799         }
1800
1801         if ((cmd->base.attr_mask & IB_QP_AV)) {
1802                 if (!rdma_is_port_valid(qp->device, cmd->base.dest.port_num)) {
1803                         ret = -EINVAL;
1804                         goto release_qp;
1805                 }
1806
1807                 if (cmd->base.attr_mask & IB_QP_STATE &&
1808                     cmd->base.qp_state == IB_QPS_RTR) {
1809                 /* We are in INIT->RTR TRANSITION (if we are not,
1810                  * this transition will be rejected in subsequent checks).
1811                  * In the INIT->RTR transition, we cannot have IB_QP_PORT set,
1812                  * but the IB_QP_STATE flag is required.
1813                  *
1814                  * Since kernel 3.14 (commit dbf727de7440), the uverbs driver,
1815                  * when IB_QP_AV is set, has required inclusion of a valid
1816                  * port number in the primary AV. (AVs are created and handled
1817                  * differently for infiniband and ethernet (RoCE) ports).
1818                  *
1819                  * Check the port number included in the primary AV against
1820                  * the port number in the qp struct, which was set (and saved)
1821                  * in the RST->INIT transition.
1822                  */
1823                         if (cmd->base.dest.port_num != qp->real_qp->port) {
1824                                 ret = -EINVAL;
1825                                 goto release_qp;
1826                         }
1827                 } else {
1828                 /* We are in SQD->SQD. (If we are not, this transition will
1829                  * be rejected later in the verbs layer checks).
1830                  * Check for both IB_QP_PORT and IB_QP_AV, these can be set
1831                  * together in the SQD->SQD transition.
1832                  *
1833                  * If only IP_QP_AV was set, add in IB_QP_PORT as well (the
1834                  * verbs layer driver does not track primary port changes
1835                  * resulting from path migration. Thus, in SQD, if the primary
1836                  * AV is modified, the primary port should also be modified).
1837                  *
1838                  * Note that in this transition, the IB_QP_STATE flag
1839                  * is not allowed.
1840                  */
1841                         if (((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT))
1842                              == (IB_QP_AV | IB_QP_PORT)) &&
1843                             cmd->base.port_num != cmd->base.dest.port_num) {
1844                                 ret = -EINVAL;
1845                                 goto release_qp;
1846                         }
1847                         if ((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT))
1848                             == IB_QP_AV) {
1849                                 cmd->base.attr_mask |= IB_QP_PORT;
1850                                 cmd->base.port_num = cmd->base.dest.port_num;
1851                         }
1852                 }
1853         }
1854
1855         if ((cmd->base.attr_mask & IB_QP_ALT_PATH) &&
1856             (!rdma_is_port_valid(qp->device, cmd->base.alt_port_num) ||
1857             !rdma_is_port_valid(qp->device, cmd->base.alt_dest.port_num) ||
1858             cmd->base.alt_port_num != cmd->base.alt_dest.port_num)) {
1859                 ret = -EINVAL;
1860                 goto release_qp;
1861         }
1862
1863         if ((cmd->base.attr_mask & IB_QP_CUR_STATE &&
1864             cmd->base.cur_qp_state > IB_QPS_ERR) ||
1865             (cmd->base.attr_mask & IB_QP_STATE &&
1866             cmd->base.qp_state > IB_QPS_ERR)) {
1867                 ret = -EINVAL;
1868                 goto release_qp;
1869         }
1870
1871         if (cmd->base.attr_mask & IB_QP_STATE)
1872                 attr->qp_state = cmd->base.qp_state;
1873         if (cmd->base.attr_mask & IB_QP_CUR_STATE)
1874                 attr->cur_qp_state = cmd->base.cur_qp_state;
1875         if (cmd->base.attr_mask & IB_QP_PATH_MTU)
1876                 attr->path_mtu = cmd->base.path_mtu;
1877         if (cmd->base.attr_mask & IB_QP_PATH_MIG_STATE)
1878                 attr->path_mig_state = cmd->base.path_mig_state;
1879         if (cmd->base.attr_mask & IB_QP_QKEY)
1880                 attr->qkey = cmd->base.qkey;
1881         if (cmd->base.attr_mask & IB_QP_RQ_PSN)
1882                 attr->rq_psn = cmd->base.rq_psn;
1883         if (cmd->base.attr_mask & IB_QP_SQ_PSN)
1884                 attr->sq_psn = cmd->base.sq_psn;
1885         if (cmd->base.attr_mask & IB_QP_DEST_QPN)
1886                 attr->dest_qp_num = cmd->base.dest_qp_num;
1887         if (cmd->base.attr_mask & IB_QP_ACCESS_FLAGS)
1888                 attr->qp_access_flags = cmd->base.qp_access_flags;
1889         if (cmd->base.attr_mask & IB_QP_PKEY_INDEX)
1890                 attr->pkey_index = cmd->base.pkey_index;
1891         if (cmd->base.attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY)
1892                 attr->en_sqd_async_notify = cmd->base.en_sqd_async_notify;
1893         if (cmd->base.attr_mask & IB_QP_MAX_QP_RD_ATOMIC)
1894                 attr->max_rd_atomic = cmd->base.max_rd_atomic;
1895         if (cmd->base.attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
1896                 attr->max_dest_rd_atomic = cmd->base.max_dest_rd_atomic;
1897         if (cmd->base.attr_mask & IB_QP_MIN_RNR_TIMER)
1898                 attr->min_rnr_timer = cmd->base.min_rnr_timer;
1899         if (cmd->base.attr_mask & IB_QP_PORT)
1900                 attr->port_num = cmd->base.port_num;
1901         if (cmd->base.attr_mask & IB_QP_TIMEOUT)
1902                 attr->timeout = cmd->base.timeout;
1903         if (cmd->base.attr_mask & IB_QP_RETRY_CNT)
1904                 attr->retry_cnt = cmd->base.retry_cnt;
1905         if (cmd->base.attr_mask & IB_QP_RNR_RETRY)
1906                 attr->rnr_retry = cmd->base.rnr_retry;
1907         if (cmd->base.attr_mask & IB_QP_ALT_PATH) {
1908                 attr->alt_port_num = cmd->base.alt_port_num;
1909                 attr->alt_timeout = cmd->base.alt_timeout;
1910                 attr->alt_pkey_index = cmd->base.alt_pkey_index;
1911         }
1912         if (cmd->base.attr_mask & IB_QP_RATE_LIMIT)
1913                 attr->rate_limit = cmd->rate_limit;
1914
1915         if (cmd->base.attr_mask & IB_QP_AV)
1916                 copy_ah_attr_from_uverbs(qp->device, &attr->ah_attr,
1917                                          &cmd->base.dest);
1918
1919         if (cmd->base.attr_mask & IB_QP_ALT_PATH)
1920                 copy_ah_attr_from_uverbs(qp->device, &attr->alt_ah_attr,
1921                                          &cmd->base.alt_dest);
1922
1923         ret = ib_modify_qp_with_udata(qp, attr,
1924                                       modify_qp_mask(qp->qp_type,
1925                                                      cmd->base.attr_mask),
1926                                       &attrs->driver_udata);
1927
1928 release_qp:
1929         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
1930                                 UVERBS_LOOKUP_READ);
1931 out:
1932         kfree(attr);
1933
1934         return ret;
1935 }
1936
1937 static int ib_uverbs_modify_qp(struct uverbs_attr_bundle *attrs)
1938 {
1939         struct ib_uverbs_ex_modify_qp cmd;
1940         int ret;
1941
1942         ret = uverbs_request(attrs, &cmd.base, sizeof(cmd.base));
1943         if (ret)
1944                 return ret;
1945
1946         if (cmd.base.attr_mask & ~IB_QP_ATTR_STANDARD_BITS)
1947                 return -EOPNOTSUPP;
1948
1949         return modify_qp(attrs, &cmd);
1950 }
1951
1952 static int ib_uverbs_ex_modify_qp(struct uverbs_attr_bundle *attrs)
1953 {
1954         struct ib_uverbs_ex_modify_qp cmd;
1955         struct ib_uverbs_ex_modify_qp_resp resp = {
1956                 .response_length = uverbs_response_length(attrs, sizeof(resp))
1957         };
1958         int ret;
1959
1960         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1961         if (ret)
1962                 return ret;
1963
1964         /*
1965          * Last bit is reserved for extending the attr_mask by
1966          * using another field.
1967          */
1968         if (cmd.base.attr_mask & ~(IB_QP_ATTR_STANDARD_BITS | IB_QP_RATE_LIMIT))
1969                 return -EOPNOTSUPP;
1970
1971         ret = modify_qp(attrs, &cmd);
1972         if (ret)
1973                 return ret;
1974
1975         return uverbs_response(attrs, &resp, sizeof(resp));
1976 }
1977
1978 static int ib_uverbs_destroy_qp(struct uverbs_attr_bundle *attrs)
1979 {
1980         struct ib_uverbs_destroy_qp      cmd;
1981         struct ib_uverbs_destroy_qp_resp resp;
1982         struct ib_uobject               *uobj;
1983         struct ib_uqp_object            *obj;
1984         int ret;
1985
1986         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1987         if (ret)
1988                 return ret;
1989
1990         uobj = uobj_get_destroy(UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
1991         if (IS_ERR(uobj))
1992                 return PTR_ERR(uobj);
1993
1994         obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
1995         memset(&resp, 0, sizeof(resp));
1996         resp.events_reported = obj->uevent.events_reported;
1997
1998         uobj_put_destroy(uobj);
1999
2000         return uverbs_response(attrs, &resp, sizeof(resp));
2001 }
2002
2003 static void *alloc_wr(size_t wr_size, __u32 num_sge)
2004 {
2005         if (num_sge >= (U32_MAX - ALIGN(wr_size, sizeof(struct ib_sge))) /
2006                                sizeof(struct ib_sge))
2007                 return NULL;
2008
2009         return kmalloc(ALIGN(wr_size, sizeof(struct ib_sge)) +
2010                                num_sge * sizeof(struct ib_sge),
2011                        GFP_KERNEL);
2012 }
2013
2014 static int ib_uverbs_post_send(struct uverbs_attr_bundle *attrs)
2015 {
2016         struct ib_uverbs_post_send      cmd;
2017         struct ib_uverbs_post_send_resp resp;
2018         struct ib_uverbs_send_wr       *user_wr;
2019         struct ib_send_wr              *wr = NULL, *last, *next;
2020         const struct ib_send_wr        *bad_wr;
2021         struct ib_qp                   *qp;
2022         int                             i, sg_ind;
2023         int                             is_ud;
2024         int ret, ret2;
2025         size_t                          next_size;
2026         const struct ib_sge __user *sgls;
2027         const void __user *wqes;
2028         struct uverbs_req_iter iter;
2029
2030         ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
2031         if (ret)
2032                 return ret;
2033         wqes = uverbs_request_next_ptr(&iter, cmd.wqe_size * cmd.wr_count);
2034         if (IS_ERR(wqes))
2035                 return PTR_ERR(wqes);
2036         sgls = uverbs_request_next_ptr(
2037                 &iter, cmd.sge_count * sizeof(struct ib_uverbs_sge));
2038         if (IS_ERR(sgls))
2039                 return PTR_ERR(sgls);
2040         ret = uverbs_request_finish(&iter);
2041         if (ret)
2042                 return ret;
2043
2044         user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
2045         if (!user_wr)
2046                 return -ENOMEM;
2047
2048         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2049         if (!qp) {
2050                 ret = -EINVAL;
2051                 goto out;
2052         }
2053
2054         is_ud = qp->qp_type == IB_QPT_UD;
2055         sg_ind = 0;
2056         last = NULL;
2057         for (i = 0; i < cmd.wr_count; ++i) {
2058                 if (copy_from_user(user_wr, wqes + i * cmd.wqe_size,
2059                                    cmd.wqe_size)) {
2060                         ret = -EFAULT;
2061                         goto out_put;
2062                 }
2063
2064                 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
2065                         ret = -EINVAL;
2066                         goto out_put;
2067                 }
2068
2069                 if (is_ud) {
2070                         struct ib_ud_wr *ud;
2071
2072                         if (user_wr->opcode != IB_WR_SEND &&
2073                             user_wr->opcode != IB_WR_SEND_WITH_IMM) {
2074                                 ret = -EINVAL;
2075                                 goto out_put;
2076                         }
2077
2078                         next_size = sizeof(*ud);
2079                         ud = alloc_wr(next_size, user_wr->num_sge);
2080                         if (!ud) {
2081                                 ret = -ENOMEM;
2082                                 goto out_put;
2083                         }
2084
2085                         ud->ah = uobj_get_obj_read(ah, UVERBS_OBJECT_AH,
2086                                                    user_wr->wr.ud.ah, attrs);
2087                         if (!ud->ah) {
2088                                 kfree(ud);
2089                                 ret = -EINVAL;
2090                                 goto out_put;
2091                         }
2092                         ud->remote_qpn = user_wr->wr.ud.remote_qpn;
2093                         ud->remote_qkey = user_wr->wr.ud.remote_qkey;
2094
2095                         next = &ud->wr;
2096                 } else if (user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM ||
2097                            user_wr->opcode == IB_WR_RDMA_WRITE ||
2098                            user_wr->opcode == IB_WR_RDMA_READ) {
2099                         struct ib_rdma_wr *rdma;
2100
2101                         next_size = sizeof(*rdma);
2102                         rdma = alloc_wr(next_size, user_wr->num_sge);
2103                         if (!rdma) {
2104                                 ret = -ENOMEM;
2105                                 goto out_put;
2106                         }
2107
2108                         rdma->remote_addr = user_wr->wr.rdma.remote_addr;
2109                         rdma->rkey = user_wr->wr.rdma.rkey;
2110
2111                         next = &rdma->wr;
2112                 } else if (user_wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP ||
2113                            user_wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) {
2114                         struct ib_atomic_wr *atomic;
2115
2116                         next_size = sizeof(*atomic);
2117                         atomic = alloc_wr(next_size, user_wr->num_sge);
2118                         if (!atomic) {
2119                                 ret = -ENOMEM;
2120                                 goto out_put;
2121                         }
2122
2123                         atomic->remote_addr = user_wr->wr.atomic.remote_addr;
2124                         atomic->compare_add = user_wr->wr.atomic.compare_add;
2125                         atomic->swap = user_wr->wr.atomic.swap;
2126                         atomic->rkey = user_wr->wr.atomic.rkey;
2127
2128                         next = &atomic->wr;
2129                 } else if (user_wr->opcode == IB_WR_SEND ||
2130                            user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2131                            user_wr->opcode == IB_WR_SEND_WITH_INV) {
2132                         next_size = sizeof(*next);
2133                         next = alloc_wr(next_size, user_wr->num_sge);
2134                         if (!next) {
2135                                 ret = -ENOMEM;
2136                                 goto out_put;
2137                         }
2138                 } else {
2139                         ret = -EINVAL;
2140                         goto out_put;
2141                 }
2142
2143                 if (user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2144                     user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) {
2145                         next->ex.imm_data =
2146                                         (__be32 __force) user_wr->ex.imm_data;
2147                 } else if (user_wr->opcode == IB_WR_SEND_WITH_INV) {
2148                         next->ex.invalidate_rkey = user_wr->ex.invalidate_rkey;
2149                 }
2150
2151                 if (!last)
2152                         wr = next;
2153                 else
2154                         last->next = next;
2155                 last = next;
2156
2157                 next->next       = NULL;
2158                 next->wr_id      = user_wr->wr_id;
2159                 next->num_sge    = user_wr->num_sge;
2160                 next->opcode     = user_wr->opcode;
2161                 next->send_flags = user_wr->send_flags;
2162
2163                 if (next->num_sge) {
2164                         next->sg_list = (void *) next +
2165                                 ALIGN(next_size, sizeof(struct ib_sge));
2166                         if (copy_from_user(next->sg_list, sgls + sg_ind,
2167                                            next->num_sge *
2168                                                    sizeof(struct ib_sge))) {
2169                                 ret = -EFAULT;
2170                                 goto out_put;
2171                         }
2172                         sg_ind += next->num_sge;
2173                 } else
2174                         next->sg_list = NULL;
2175         }
2176
2177         resp.bad_wr = 0;
2178         ret = qp->device->ops.post_send(qp->real_qp, wr, &bad_wr);
2179         if (ret)
2180                 for (next = wr; next; next = next->next) {
2181                         ++resp.bad_wr;
2182                         if (next == bad_wr)
2183                                 break;
2184                 }
2185
2186         ret2 = uverbs_response(attrs, &resp, sizeof(resp));
2187         if (ret2)
2188                 ret = ret2;
2189
2190 out_put:
2191         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
2192                                 UVERBS_LOOKUP_READ);
2193
2194         while (wr) {
2195                 if (is_ud && ud_wr(wr)->ah)
2196                         uobj_put_obj_read(ud_wr(wr)->ah);
2197                 next = wr->next;
2198                 kfree(wr);
2199                 wr = next;
2200         }
2201
2202 out:
2203         kfree(user_wr);
2204
2205         return ret;
2206 }
2207
2208 static struct ib_recv_wr *
2209 ib_uverbs_unmarshall_recv(struct uverbs_req_iter *iter, u32 wr_count,
2210                           u32 wqe_size, u32 sge_count)
2211 {
2212         struct ib_uverbs_recv_wr *user_wr;
2213         struct ib_recv_wr        *wr = NULL, *last, *next;
2214         int                       sg_ind;
2215         int                       i;
2216         int                       ret;
2217         const struct ib_sge __user *sgls;
2218         const void __user *wqes;
2219
2220         if (wqe_size < sizeof(struct ib_uverbs_recv_wr))
2221                 return ERR_PTR(-EINVAL);
2222
2223         wqes = uverbs_request_next_ptr(iter, wqe_size * wr_count);
2224         if (IS_ERR(wqes))
2225                 return ERR_CAST(wqes);
2226         sgls = uverbs_request_next_ptr(
2227                 iter, sge_count * sizeof(struct ib_uverbs_sge));
2228         if (IS_ERR(sgls))
2229                 return ERR_CAST(sgls);
2230         ret = uverbs_request_finish(iter);
2231         if (ret)
2232                 return ERR_PTR(ret);
2233
2234         user_wr = kmalloc(wqe_size, GFP_KERNEL);
2235         if (!user_wr)
2236                 return ERR_PTR(-ENOMEM);
2237
2238         sg_ind = 0;
2239         last = NULL;
2240         for (i = 0; i < wr_count; ++i) {
2241                 if (copy_from_user(user_wr, wqes + i * wqe_size,
2242                                    wqe_size)) {
2243                         ret = -EFAULT;
2244                         goto err;
2245                 }
2246
2247                 if (user_wr->num_sge + sg_ind > sge_count) {
2248                         ret = -EINVAL;
2249                         goto err;
2250                 }
2251
2252                 if (user_wr->num_sge >=
2253                     (U32_MAX - ALIGN(sizeof(*next), sizeof(struct ib_sge))) /
2254                             sizeof(struct ib_sge)) {
2255                         ret = -EINVAL;
2256                         goto err;
2257                 }
2258
2259                 next = kmalloc(ALIGN(sizeof(*next), sizeof(struct ib_sge)) +
2260                                        user_wr->num_sge * sizeof(struct ib_sge),
2261                                GFP_KERNEL);
2262                 if (!next) {
2263                         ret = -ENOMEM;
2264                         goto err;
2265                 }
2266
2267                 if (!last)
2268                         wr = next;
2269                 else
2270                         last->next = next;
2271                 last = next;
2272
2273                 next->next       = NULL;
2274                 next->wr_id      = user_wr->wr_id;
2275                 next->num_sge    = user_wr->num_sge;
2276
2277                 if (next->num_sge) {
2278                         next->sg_list = (void *)next +
2279                                 ALIGN(sizeof(*next), sizeof(struct ib_sge));
2280                         if (copy_from_user(next->sg_list, sgls + sg_ind,
2281                                            next->num_sge *
2282                                                    sizeof(struct ib_sge))) {
2283                                 ret = -EFAULT;
2284                                 goto err;
2285                         }
2286                         sg_ind += next->num_sge;
2287                 } else
2288                         next->sg_list = NULL;
2289         }
2290
2291         kfree(user_wr);
2292         return wr;
2293
2294 err:
2295         kfree(user_wr);
2296
2297         while (wr) {
2298                 next = wr->next;
2299                 kfree(wr);
2300                 wr = next;
2301         }
2302
2303         return ERR_PTR(ret);
2304 }
2305
2306 static int ib_uverbs_post_recv(struct uverbs_attr_bundle *attrs)
2307 {
2308         struct ib_uverbs_post_recv      cmd;
2309         struct ib_uverbs_post_recv_resp resp;
2310         struct ib_recv_wr              *wr, *next;
2311         const struct ib_recv_wr        *bad_wr;
2312         struct ib_qp                   *qp;
2313         int ret, ret2;
2314         struct uverbs_req_iter iter;
2315
2316         ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
2317         if (ret)
2318                 return ret;
2319
2320         wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size,
2321                                        cmd.sge_count);
2322         if (IS_ERR(wr))
2323                 return PTR_ERR(wr);
2324
2325         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2326         if (!qp) {
2327                 ret = -EINVAL;
2328                 goto out;
2329         }
2330
2331         resp.bad_wr = 0;
2332         ret = qp->device->ops.post_recv(qp->real_qp, wr, &bad_wr);
2333
2334         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
2335                                 UVERBS_LOOKUP_READ);
2336         if (ret) {
2337                 for (next = wr; next; next = next->next) {
2338                         ++resp.bad_wr;
2339                         if (next == bad_wr)
2340                                 break;
2341                 }
2342         }
2343
2344         ret2 = uverbs_response(attrs, &resp, sizeof(resp));
2345         if (ret2)
2346                 ret = ret2;
2347 out:
2348         while (wr) {
2349                 next = wr->next;
2350                 kfree(wr);
2351                 wr = next;
2352         }
2353
2354         return ret;
2355 }
2356
2357 static int ib_uverbs_post_srq_recv(struct uverbs_attr_bundle *attrs)
2358 {
2359         struct ib_uverbs_post_srq_recv      cmd;
2360         struct ib_uverbs_post_srq_recv_resp resp;
2361         struct ib_recv_wr                  *wr, *next;
2362         const struct ib_recv_wr            *bad_wr;
2363         struct ib_srq                      *srq;
2364         int ret, ret2;
2365         struct uverbs_req_iter iter;
2366
2367         ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
2368         if (ret)
2369                 return ret;
2370
2371         wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size,
2372                                        cmd.sge_count);
2373         if (IS_ERR(wr))
2374                 return PTR_ERR(wr);
2375
2376         srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
2377         if (!srq) {
2378                 ret = -EINVAL;
2379                 goto out;
2380         }
2381
2382         resp.bad_wr = 0;
2383         ret = srq->device->ops.post_srq_recv(srq, wr, &bad_wr);
2384
2385         rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
2386                                 UVERBS_LOOKUP_READ);
2387
2388         if (ret)
2389                 for (next = wr; next; next = next->next) {
2390                         ++resp.bad_wr;
2391                         if (next == bad_wr)
2392                                 break;
2393                 }
2394
2395         ret2 = uverbs_response(attrs, &resp, sizeof(resp));
2396         if (ret2)
2397                 ret = ret2;
2398
2399 out:
2400         while (wr) {
2401                 next = wr->next;
2402                 kfree(wr);
2403                 wr = next;
2404         }
2405
2406         return ret;
2407 }
2408
2409 static int ib_uverbs_create_ah(struct uverbs_attr_bundle *attrs)
2410 {
2411         struct ib_uverbs_create_ah       cmd;
2412         struct ib_uverbs_create_ah_resp  resp;
2413         struct ib_uobject               *uobj;
2414         struct ib_pd                    *pd;
2415         struct ib_ah                    *ah;
2416         struct rdma_ah_attr             attr = {};
2417         int ret;
2418         struct ib_device *ib_dev;
2419
2420         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2421         if (ret)
2422                 return ret;
2423
2424         uobj = uobj_alloc(UVERBS_OBJECT_AH, attrs, &ib_dev);
2425         if (IS_ERR(uobj))
2426                 return PTR_ERR(uobj);
2427
2428         if (!rdma_is_port_valid(ib_dev, cmd.attr.port_num)) {
2429                 ret = -EINVAL;
2430                 goto err;
2431         }
2432
2433         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
2434         if (!pd) {
2435                 ret = -EINVAL;
2436                 goto err;
2437         }
2438
2439         attr.type = rdma_ah_find_type(ib_dev, cmd.attr.port_num);
2440         rdma_ah_set_make_grd(&attr, false);
2441         rdma_ah_set_dlid(&attr, cmd.attr.dlid);
2442         rdma_ah_set_sl(&attr, cmd.attr.sl);
2443         rdma_ah_set_path_bits(&attr, cmd.attr.src_path_bits);
2444         rdma_ah_set_static_rate(&attr, cmd.attr.static_rate);
2445         rdma_ah_set_port_num(&attr, cmd.attr.port_num);
2446
2447         if (cmd.attr.is_global) {
2448                 rdma_ah_set_grh(&attr, NULL, cmd.attr.grh.flow_label,
2449                                 cmd.attr.grh.sgid_index,
2450                                 cmd.attr.grh.hop_limit,
2451                                 cmd.attr.grh.traffic_class);
2452                 rdma_ah_set_dgid_raw(&attr, cmd.attr.grh.dgid);
2453         } else {
2454                 rdma_ah_set_ah_flags(&attr, 0);
2455         }
2456
2457         ah = rdma_create_user_ah(pd, &attr, &attrs->driver_udata);
2458         if (IS_ERR(ah)) {
2459                 ret = PTR_ERR(ah);
2460                 goto err_put;
2461         }
2462
2463         ah->uobject  = uobj;
2464         uobj->user_handle = cmd.user_handle;
2465         uobj->object = ah;
2466         uobj_put_obj_read(pd);
2467         uobj_finalize_uobj_create(uobj, attrs);
2468
2469         resp.ah_handle = uobj->id;
2470         return uverbs_response(attrs, &resp, sizeof(resp));
2471
2472 err_put:
2473         uobj_put_obj_read(pd);
2474 err:
2475         uobj_alloc_abort(uobj, attrs);
2476         return ret;
2477 }
2478
2479 static int ib_uverbs_destroy_ah(struct uverbs_attr_bundle *attrs)
2480 {
2481         struct ib_uverbs_destroy_ah cmd;
2482         int ret;
2483
2484         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2485         if (ret)
2486                 return ret;
2487
2488         return uobj_perform_destroy(UVERBS_OBJECT_AH, cmd.ah_handle, attrs);
2489 }
2490
2491 static int ib_uverbs_attach_mcast(struct uverbs_attr_bundle *attrs)
2492 {
2493         struct ib_uverbs_attach_mcast cmd;
2494         struct ib_qp                 *qp;
2495         struct ib_uqp_object         *obj;
2496         struct ib_uverbs_mcast_entry *mcast;
2497         int                           ret;
2498
2499         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2500         if (ret)
2501                 return ret;
2502
2503         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2504         if (!qp)
2505                 return -EINVAL;
2506
2507         obj = qp->uobject;
2508
2509         mutex_lock(&obj->mcast_lock);
2510         list_for_each_entry(mcast, &obj->mcast_list, list)
2511                 if (cmd.mlid == mcast->lid &&
2512                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2513                         ret = 0;
2514                         goto out_put;
2515                 }
2516
2517         mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
2518         if (!mcast) {
2519                 ret = -ENOMEM;
2520                 goto out_put;
2521         }
2522
2523         mcast->lid = cmd.mlid;
2524         memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
2525
2526         ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
2527         if (!ret)
2528                 list_add_tail(&mcast->list, &obj->mcast_list);
2529         else
2530                 kfree(mcast);
2531
2532 out_put:
2533         mutex_unlock(&obj->mcast_lock);
2534         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
2535                                 UVERBS_LOOKUP_READ);
2536
2537         return ret;
2538 }
2539
2540 static int ib_uverbs_detach_mcast(struct uverbs_attr_bundle *attrs)
2541 {
2542         struct ib_uverbs_detach_mcast cmd;
2543         struct ib_uqp_object         *obj;
2544         struct ib_qp                 *qp;
2545         struct ib_uverbs_mcast_entry *mcast;
2546         int                           ret;
2547         bool                          found = false;
2548
2549         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2550         if (ret)
2551                 return ret;
2552
2553         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2554         if (!qp)
2555                 return -EINVAL;
2556
2557         obj = qp->uobject;
2558         mutex_lock(&obj->mcast_lock);
2559
2560         list_for_each_entry(mcast, &obj->mcast_list, list)
2561                 if (cmd.mlid == mcast->lid &&
2562                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2563                         list_del(&mcast->list);
2564                         kfree(mcast);
2565                         found = true;
2566                         break;
2567                 }
2568
2569         if (!found) {
2570                 ret = -EINVAL;
2571                 goto out_put;
2572         }
2573
2574         ret = ib_detach_mcast(qp, (union ib_gid *)cmd.gid, cmd.mlid);
2575
2576 out_put:
2577         mutex_unlock(&obj->mcast_lock);
2578         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
2579                                 UVERBS_LOOKUP_READ);
2580         return ret;
2581 }
2582
2583 struct ib_uflow_resources *flow_resources_alloc(size_t num_specs)
2584 {
2585         struct ib_uflow_resources *resources;
2586
2587         resources = kzalloc(sizeof(*resources), GFP_KERNEL);
2588
2589         if (!resources)
2590                 return NULL;
2591
2592         if (!num_specs)
2593                 goto out;
2594
2595         resources->counters =
2596                 kcalloc(num_specs, sizeof(*resources->counters), GFP_KERNEL);
2597         resources->collection =
2598                 kcalloc(num_specs, sizeof(*resources->collection), GFP_KERNEL);
2599
2600         if (!resources->counters || !resources->collection)
2601                 goto err;
2602
2603 out:
2604         resources->max = num_specs;
2605         return resources;
2606
2607 err:
2608         kfree(resources->counters);
2609         kfree(resources);
2610
2611         return NULL;
2612 }
2613 EXPORT_SYMBOL(flow_resources_alloc);
2614
2615 void ib_uverbs_flow_resources_free(struct ib_uflow_resources *uflow_res)
2616 {
2617         unsigned int i;
2618
2619         if (!uflow_res)
2620                 return;
2621
2622         for (i = 0; i < uflow_res->collection_num; i++)
2623                 atomic_dec(&uflow_res->collection[i]->usecnt);
2624
2625         for (i = 0; i < uflow_res->counters_num; i++)
2626                 atomic_dec(&uflow_res->counters[i]->usecnt);
2627
2628         kfree(uflow_res->collection);
2629         kfree(uflow_res->counters);
2630         kfree(uflow_res);
2631 }
2632 EXPORT_SYMBOL(ib_uverbs_flow_resources_free);
2633
2634 void flow_resources_add(struct ib_uflow_resources *uflow_res,
2635                         enum ib_flow_spec_type type,
2636                         void *ibobj)
2637 {
2638         WARN_ON(uflow_res->num >= uflow_res->max);
2639
2640         switch (type) {
2641         case IB_FLOW_SPEC_ACTION_HANDLE:
2642                 atomic_inc(&((struct ib_flow_action *)ibobj)->usecnt);
2643                 uflow_res->collection[uflow_res->collection_num++] =
2644                         (struct ib_flow_action *)ibobj;
2645                 break;
2646         case IB_FLOW_SPEC_ACTION_COUNT:
2647                 atomic_inc(&((struct ib_counters *)ibobj)->usecnt);
2648                 uflow_res->counters[uflow_res->counters_num++] =
2649                         (struct ib_counters *)ibobj;
2650                 break;
2651         default:
2652                 WARN_ON(1);
2653         }
2654
2655         uflow_res->num++;
2656 }
2657 EXPORT_SYMBOL(flow_resources_add);
2658
2659 static int kern_spec_to_ib_spec_action(struct uverbs_attr_bundle *attrs,
2660                                        struct ib_uverbs_flow_spec *kern_spec,
2661                                        union ib_flow_spec *ib_spec,
2662                                        struct ib_uflow_resources *uflow_res)
2663 {
2664         ib_spec->type = kern_spec->type;
2665         switch (ib_spec->type) {
2666         case IB_FLOW_SPEC_ACTION_TAG:
2667                 if (kern_spec->flow_tag.size !=
2668                     sizeof(struct ib_uverbs_flow_spec_action_tag))
2669                         return -EINVAL;
2670
2671                 ib_spec->flow_tag.size = sizeof(struct ib_flow_spec_action_tag);
2672                 ib_spec->flow_tag.tag_id = kern_spec->flow_tag.tag_id;
2673                 break;
2674         case IB_FLOW_SPEC_ACTION_DROP:
2675                 if (kern_spec->drop.size !=
2676                     sizeof(struct ib_uverbs_flow_spec_action_drop))
2677                         return -EINVAL;
2678
2679                 ib_spec->drop.size = sizeof(struct ib_flow_spec_action_drop);
2680                 break;
2681         case IB_FLOW_SPEC_ACTION_HANDLE:
2682                 if (kern_spec->action.size !=
2683                     sizeof(struct ib_uverbs_flow_spec_action_handle))
2684                         return -EOPNOTSUPP;
2685                 ib_spec->action.act = uobj_get_obj_read(flow_action,
2686                                                         UVERBS_OBJECT_FLOW_ACTION,
2687                                                         kern_spec->action.handle,
2688                                                         attrs);
2689                 if (!ib_spec->action.act)
2690                         return -EINVAL;
2691                 ib_spec->action.size =
2692                         sizeof(struct ib_flow_spec_action_handle);
2693                 flow_resources_add(uflow_res,
2694                                    IB_FLOW_SPEC_ACTION_HANDLE,
2695                                    ib_spec->action.act);
2696                 uobj_put_obj_read(ib_spec->action.act);
2697                 break;
2698         case IB_FLOW_SPEC_ACTION_COUNT:
2699                 if (kern_spec->flow_count.size !=
2700                         sizeof(struct ib_uverbs_flow_spec_action_count))
2701                         return -EINVAL;
2702                 ib_spec->flow_count.counters =
2703                         uobj_get_obj_read(counters,
2704                                           UVERBS_OBJECT_COUNTERS,
2705                                           kern_spec->flow_count.handle,
2706                                           attrs);
2707                 if (!ib_spec->flow_count.counters)
2708                         return -EINVAL;
2709                 ib_spec->flow_count.size =
2710                                 sizeof(struct ib_flow_spec_action_count);
2711                 flow_resources_add(uflow_res,
2712                                    IB_FLOW_SPEC_ACTION_COUNT,
2713                                    ib_spec->flow_count.counters);
2714                 uobj_put_obj_read(ib_spec->flow_count.counters);
2715                 break;
2716         default:
2717                 return -EINVAL;
2718         }
2719         return 0;
2720 }
2721
2722 static ssize_t spec_filter_size(const void *kern_spec_filter, u16 kern_filter_size,
2723                                 u16 ib_real_filter_sz)
2724 {
2725         /*
2726          * User space filter structures must be 64 bit aligned, otherwise this
2727          * may pass, but we won't handle additional new attributes.
2728          */
2729
2730         if (kern_filter_size > ib_real_filter_sz) {
2731                 if (memchr_inv(kern_spec_filter +
2732                                ib_real_filter_sz, 0,
2733                                kern_filter_size - ib_real_filter_sz))
2734                         return -EINVAL;
2735                 return ib_real_filter_sz;
2736         }
2737         return kern_filter_size;
2738 }
2739
2740 int ib_uverbs_kern_spec_to_ib_spec_filter(enum ib_flow_spec_type type,
2741                                           const void *kern_spec_mask,
2742                                           const void *kern_spec_val,
2743                                           size_t kern_filter_sz,
2744                                           union ib_flow_spec *ib_spec)
2745 {
2746         ssize_t actual_filter_sz;
2747         ssize_t ib_filter_sz;
2748
2749         /* User flow spec size must be aligned to 4 bytes */
2750         if (kern_filter_sz != ALIGN(kern_filter_sz, 4))
2751                 return -EINVAL;
2752
2753         ib_spec->type = type;
2754
2755         if (ib_spec->type == (IB_FLOW_SPEC_INNER | IB_FLOW_SPEC_VXLAN_TUNNEL))
2756                 return -EINVAL;
2757
2758         switch (ib_spec->type & ~IB_FLOW_SPEC_INNER) {
2759         case IB_FLOW_SPEC_ETH:
2760                 ib_filter_sz = offsetof(struct ib_flow_eth_filter, real_sz);
2761                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2762                                                     kern_filter_sz,
2763                                                     ib_filter_sz);
2764                 if (actual_filter_sz <= 0)
2765                         return -EINVAL;
2766                 ib_spec->size = sizeof(struct ib_flow_spec_eth);
2767                 memcpy(&ib_spec->eth.val, kern_spec_val, actual_filter_sz);
2768                 memcpy(&ib_spec->eth.mask, kern_spec_mask, actual_filter_sz);
2769                 break;
2770         case IB_FLOW_SPEC_IPV4:
2771                 ib_filter_sz = offsetof(struct ib_flow_ipv4_filter, real_sz);
2772                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2773                                                     kern_filter_sz,
2774                                                     ib_filter_sz);
2775                 if (actual_filter_sz <= 0)
2776                         return -EINVAL;
2777                 ib_spec->size = sizeof(struct ib_flow_spec_ipv4);
2778                 memcpy(&ib_spec->ipv4.val, kern_spec_val, actual_filter_sz);
2779                 memcpy(&ib_spec->ipv4.mask, kern_spec_mask, actual_filter_sz);
2780                 break;
2781         case IB_FLOW_SPEC_IPV6:
2782                 ib_filter_sz = offsetof(struct ib_flow_ipv6_filter, real_sz);
2783                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2784                                                     kern_filter_sz,
2785                                                     ib_filter_sz);
2786                 if (actual_filter_sz <= 0)
2787                         return -EINVAL;
2788                 ib_spec->size = sizeof(struct ib_flow_spec_ipv6);
2789                 memcpy(&ib_spec->ipv6.val, kern_spec_val, actual_filter_sz);
2790                 memcpy(&ib_spec->ipv6.mask, kern_spec_mask, actual_filter_sz);
2791
2792                 if ((ntohl(ib_spec->ipv6.mask.flow_label)) >= BIT(20) ||
2793                     (ntohl(ib_spec->ipv6.val.flow_label)) >= BIT(20))
2794                         return -EINVAL;
2795                 break;
2796         case IB_FLOW_SPEC_TCP:
2797         case IB_FLOW_SPEC_UDP:
2798                 ib_filter_sz = offsetof(struct ib_flow_tcp_udp_filter, real_sz);
2799                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2800                                                     kern_filter_sz,
2801                                                     ib_filter_sz);
2802                 if (actual_filter_sz <= 0)
2803                         return -EINVAL;
2804                 ib_spec->size = sizeof(struct ib_flow_spec_tcp_udp);
2805                 memcpy(&ib_spec->tcp_udp.val, kern_spec_val, actual_filter_sz);
2806                 memcpy(&ib_spec->tcp_udp.mask, kern_spec_mask, actual_filter_sz);
2807                 break;
2808         case IB_FLOW_SPEC_VXLAN_TUNNEL:
2809                 ib_filter_sz = offsetof(struct ib_flow_tunnel_filter, real_sz);
2810                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2811                                                     kern_filter_sz,
2812                                                     ib_filter_sz);
2813                 if (actual_filter_sz <= 0)
2814                         return -EINVAL;
2815                 ib_spec->tunnel.size = sizeof(struct ib_flow_spec_tunnel);
2816                 memcpy(&ib_spec->tunnel.val, kern_spec_val, actual_filter_sz);
2817                 memcpy(&ib_spec->tunnel.mask, kern_spec_mask, actual_filter_sz);
2818
2819                 if ((ntohl(ib_spec->tunnel.mask.tunnel_id)) >= BIT(24) ||
2820                     (ntohl(ib_spec->tunnel.val.tunnel_id)) >= BIT(24))
2821                         return -EINVAL;
2822                 break;
2823         case IB_FLOW_SPEC_ESP:
2824                 ib_filter_sz = offsetof(struct ib_flow_esp_filter, real_sz);
2825                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2826                                                     kern_filter_sz,
2827                                                     ib_filter_sz);
2828                 if (actual_filter_sz <= 0)
2829                         return -EINVAL;
2830                 ib_spec->esp.size = sizeof(struct ib_flow_spec_esp);
2831                 memcpy(&ib_spec->esp.val, kern_spec_val, actual_filter_sz);
2832                 memcpy(&ib_spec->esp.mask, kern_spec_mask, actual_filter_sz);
2833                 break;
2834         case IB_FLOW_SPEC_GRE:
2835                 ib_filter_sz = offsetof(struct ib_flow_gre_filter, real_sz);
2836                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2837                                                     kern_filter_sz,
2838                                                     ib_filter_sz);
2839                 if (actual_filter_sz <= 0)
2840                         return -EINVAL;
2841                 ib_spec->gre.size = sizeof(struct ib_flow_spec_gre);
2842                 memcpy(&ib_spec->gre.val, kern_spec_val, actual_filter_sz);
2843                 memcpy(&ib_spec->gre.mask, kern_spec_mask, actual_filter_sz);
2844                 break;
2845         case IB_FLOW_SPEC_MPLS:
2846                 ib_filter_sz = offsetof(struct ib_flow_mpls_filter, real_sz);
2847                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2848                                                     kern_filter_sz,
2849                                                     ib_filter_sz);
2850                 if (actual_filter_sz <= 0)
2851                         return -EINVAL;
2852                 ib_spec->mpls.size = sizeof(struct ib_flow_spec_mpls);
2853                 memcpy(&ib_spec->mpls.val, kern_spec_val, actual_filter_sz);
2854                 memcpy(&ib_spec->mpls.mask, kern_spec_mask, actual_filter_sz);
2855                 break;
2856         default:
2857                 return -EINVAL;
2858         }
2859         return 0;
2860 }
2861
2862 static int kern_spec_to_ib_spec_filter(struct ib_uverbs_flow_spec *kern_spec,
2863                                        union ib_flow_spec *ib_spec)
2864 {
2865         size_t kern_filter_sz;
2866         void *kern_spec_mask;
2867         void *kern_spec_val;
2868
2869         if (check_sub_overflow((size_t)kern_spec->hdr.size,
2870                                sizeof(struct ib_uverbs_flow_spec_hdr),
2871                                &kern_filter_sz))
2872                 return -EINVAL;
2873
2874         kern_filter_sz /= 2;
2875
2876         kern_spec_val = (void *)kern_spec +
2877                 sizeof(struct ib_uverbs_flow_spec_hdr);
2878         kern_spec_mask = kern_spec_val + kern_filter_sz;
2879
2880         return ib_uverbs_kern_spec_to_ib_spec_filter(kern_spec->type,
2881                                                      kern_spec_mask,
2882                                                      kern_spec_val,
2883                                                      kern_filter_sz, ib_spec);
2884 }
2885
2886 static int kern_spec_to_ib_spec(struct uverbs_attr_bundle *attrs,
2887                                 struct ib_uverbs_flow_spec *kern_spec,
2888                                 union ib_flow_spec *ib_spec,
2889                                 struct ib_uflow_resources *uflow_res)
2890 {
2891         if (kern_spec->reserved)
2892                 return -EINVAL;
2893
2894         if (kern_spec->type >= IB_FLOW_SPEC_ACTION_TAG)
2895                 return kern_spec_to_ib_spec_action(attrs, kern_spec, ib_spec,
2896                                                    uflow_res);
2897         else
2898                 return kern_spec_to_ib_spec_filter(kern_spec, ib_spec);
2899 }
2900
2901 static int ib_uverbs_ex_create_wq(struct uverbs_attr_bundle *attrs)
2902 {
2903         struct ib_uverbs_ex_create_wq cmd;
2904         struct ib_uverbs_ex_create_wq_resp resp = {};
2905         struct ib_uwq_object           *obj;
2906         int err = 0;
2907         struct ib_cq *cq;
2908         struct ib_pd *pd;
2909         struct ib_wq *wq;
2910         struct ib_wq_init_attr wq_init_attr = {};
2911         struct ib_device *ib_dev;
2912
2913         err = uverbs_request(attrs, &cmd, sizeof(cmd));
2914         if (err)
2915                 return err;
2916
2917         if (cmd.comp_mask)
2918                 return -EOPNOTSUPP;
2919
2920         obj = (struct ib_uwq_object *)uobj_alloc(UVERBS_OBJECT_WQ, attrs,
2921                                                  &ib_dev);
2922         if (IS_ERR(obj))
2923                 return PTR_ERR(obj);
2924
2925         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
2926         if (!pd) {
2927                 err = -EINVAL;
2928                 goto err_uobj;
2929         }
2930
2931         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
2932         if (!cq) {
2933                 err = -EINVAL;
2934                 goto err_put_pd;
2935         }
2936
2937         wq_init_attr.cq = cq;
2938         wq_init_attr.max_sge = cmd.max_sge;
2939         wq_init_attr.max_wr = cmd.max_wr;
2940         wq_init_attr.wq_type = cmd.wq_type;
2941         wq_init_attr.event_handler = ib_uverbs_wq_event_handler;
2942         wq_init_attr.create_flags = cmd.create_flags;
2943         INIT_LIST_HEAD(&obj->uevent.event_list);
2944         obj->uevent.uobject.user_handle = cmd.user_handle;
2945
2946         wq = pd->device->ops.create_wq(pd, &wq_init_attr, &attrs->driver_udata);
2947         if (IS_ERR(wq)) {
2948                 err = PTR_ERR(wq);
2949                 goto err_put_cq;
2950         }
2951
2952         wq->uobject = obj;
2953         obj->uevent.uobject.object = wq;
2954         wq->wq_type = wq_init_attr.wq_type;
2955         wq->cq = cq;
2956         wq->pd = pd;
2957         wq->device = pd->device;
2958         atomic_set(&wq->usecnt, 0);
2959         atomic_inc(&pd->usecnt);
2960         atomic_inc(&cq->usecnt);
2961         obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file);
2962         if (obj->uevent.event_file)
2963                 uverbs_uobject_get(&obj->uevent.event_file->uobj);
2964
2965         uobj_put_obj_read(pd);
2966         rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
2967                                 UVERBS_LOOKUP_READ);
2968         uobj_finalize_uobj_create(&obj->uevent.uobject, attrs);
2969
2970         resp.wq_handle = obj->uevent.uobject.id;
2971         resp.max_sge = wq_init_attr.max_sge;
2972         resp.max_wr = wq_init_attr.max_wr;
2973         resp.wqn = wq->wq_num;
2974         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
2975         return uverbs_response(attrs, &resp, sizeof(resp));
2976
2977 err_put_cq:
2978         rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
2979                                 UVERBS_LOOKUP_READ);
2980 err_put_pd:
2981         uobj_put_obj_read(pd);
2982 err_uobj:
2983         uobj_alloc_abort(&obj->uevent.uobject, attrs);
2984
2985         return err;
2986 }
2987
2988 static int ib_uverbs_ex_destroy_wq(struct uverbs_attr_bundle *attrs)
2989 {
2990         struct ib_uverbs_ex_destroy_wq  cmd;
2991         struct ib_uverbs_ex_destroy_wq_resp     resp = {};
2992         struct ib_uobject               *uobj;
2993         struct ib_uwq_object            *obj;
2994         int                             ret;
2995
2996         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2997         if (ret)
2998                 return ret;
2999
3000         if (cmd.comp_mask)
3001                 return -EOPNOTSUPP;
3002
3003         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
3004         uobj = uobj_get_destroy(UVERBS_OBJECT_WQ, cmd.wq_handle, attrs);
3005         if (IS_ERR(uobj))
3006                 return PTR_ERR(uobj);
3007
3008         obj = container_of(uobj, struct ib_uwq_object, uevent.uobject);
3009         resp.events_reported = obj->uevent.events_reported;
3010
3011         uobj_put_destroy(uobj);
3012
3013         return uverbs_response(attrs, &resp, sizeof(resp));
3014 }
3015
3016 static int ib_uverbs_ex_modify_wq(struct uverbs_attr_bundle *attrs)
3017 {
3018         struct ib_uverbs_ex_modify_wq cmd;
3019         struct ib_wq *wq;
3020         struct ib_wq_attr wq_attr = {};
3021         int ret;
3022
3023         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3024         if (ret)
3025                 return ret;
3026
3027         if (!cmd.attr_mask)
3028                 return -EINVAL;
3029
3030         if (cmd.attr_mask > (IB_WQ_STATE | IB_WQ_CUR_STATE | IB_WQ_FLAGS))
3031                 return -EINVAL;
3032
3033         wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ, cmd.wq_handle, attrs);
3034         if (!wq)
3035                 return -EINVAL;
3036
3037         wq_attr.curr_wq_state = cmd.curr_wq_state;
3038         wq_attr.wq_state = cmd.wq_state;
3039         if (cmd.attr_mask & IB_WQ_FLAGS) {
3040                 wq_attr.flags = cmd.flags;
3041                 wq_attr.flags_mask = cmd.flags_mask;
3042         }
3043         ret = wq->device->ops.modify_wq(wq, &wq_attr, cmd.attr_mask,
3044                                         &attrs->driver_udata);
3045         rdma_lookup_put_uobject(&wq->uobject->uevent.uobject,
3046                                 UVERBS_LOOKUP_READ);
3047         return ret;
3048 }
3049
3050 static int ib_uverbs_ex_create_rwq_ind_table(struct uverbs_attr_bundle *attrs)
3051 {
3052         struct ib_uverbs_ex_create_rwq_ind_table cmd;
3053         struct ib_uverbs_ex_create_rwq_ind_table_resp  resp = {};
3054         struct ib_uobject *uobj;
3055         int err;
3056         struct ib_rwq_ind_table_init_attr init_attr = {};
3057         struct ib_rwq_ind_table *rwq_ind_tbl;
3058         struct ib_wq **wqs = NULL;
3059         u32 *wqs_handles = NULL;
3060         struct ib_wq    *wq = NULL;
3061         int i, num_read_wqs;
3062         u32 num_wq_handles;
3063         struct uverbs_req_iter iter;
3064         struct ib_device *ib_dev;
3065
3066         err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
3067         if (err)
3068                 return err;
3069
3070         if (cmd.comp_mask)
3071                 return -EOPNOTSUPP;
3072
3073         if (cmd.log_ind_tbl_size > IB_USER_VERBS_MAX_LOG_IND_TBL_SIZE)
3074                 return -EINVAL;
3075
3076         num_wq_handles = 1 << cmd.log_ind_tbl_size;
3077         wqs_handles = kcalloc(num_wq_handles, sizeof(*wqs_handles),
3078                               GFP_KERNEL);
3079         if (!wqs_handles)
3080                 return -ENOMEM;
3081
3082         err = uverbs_request_next(&iter, wqs_handles,
3083                                   num_wq_handles * sizeof(__u32));
3084         if (err)
3085                 goto err_free;
3086
3087         err = uverbs_request_finish(&iter);
3088         if (err)
3089                 goto err_free;
3090
3091         wqs = kcalloc(num_wq_handles, sizeof(*wqs), GFP_KERNEL);
3092         if (!wqs) {
3093                 err = -ENOMEM;
3094                 goto  err_free;
3095         }
3096
3097         for (num_read_wqs = 0; num_read_wqs < num_wq_handles;
3098                         num_read_wqs++) {
3099                 wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ,
3100                                        wqs_handles[num_read_wqs], attrs);
3101                 if (!wq) {
3102                         err = -EINVAL;
3103                         goto put_wqs;
3104                 }
3105
3106                 wqs[num_read_wqs] = wq;
3107                 atomic_inc(&wqs[num_read_wqs]->usecnt);
3108         }
3109
3110         uobj = uobj_alloc(UVERBS_OBJECT_RWQ_IND_TBL, attrs, &ib_dev);
3111         if (IS_ERR(uobj)) {
3112                 err = PTR_ERR(uobj);
3113                 goto put_wqs;
3114         }
3115
3116         rwq_ind_tbl = rdma_zalloc_drv_obj(ib_dev, ib_rwq_ind_table);
3117         if (!rwq_ind_tbl) {
3118                 err = -ENOMEM;
3119                 goto err_uobj;
3120         }
3121
3122         init_attr.log_ind_tbl_size = cmd.log_ind_tbl_size;
3123         init_attr.ind_tbl = wqs;
3124
3125         rwq_ind_tbl->ind_tbl = wqs;
3126         rwq_ind_tbl->log_ind_tbl_size = init_attr.log_ind_tbl_size;
3127         rwq_ind_tbl->uobject = uobj;
3128         uobj->object = rwq_ind_tbl;
3129         rwq_ind_tbl->device = ib_dev;
3130         atomic_set(&rwq_ind_tbl->usecnt, 0);
3131
3132         err = ib_dev->ops.create_rwq_ind_table(rwq_ind_tbl, &init_attr,
3133                                                &attrs->driver_udata);
3134         if (err)
3135                 goto err_create;
3136
3137         for (i = 0; i < num_wq_handles; i++)
3138                 rdma_lookup_put_uobject(&wqs[i]->uobject->uevent.uobject,
3139                                         UVERBS_LOOKUP_READ);
3140         kfree(wqs_handles);
3141         uobj_finalize_uobj_create(uobj, attrs);
3142
3143         resp.ind_tbl_handle = uobj->id;
3144         resp.ind_tbl_num = rwq_ind_tbl->ind_tbl_num;
3145         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
3146         return uverbs_response(attrs, &resp, sizeof(resp));
3147
3148 err_create:
3149         kfree(rwq_ind_tbl);
3150 err_uobj:
3151         uobj_alloc_abort(uobj, attrs);
3152 put_wqs:
3153         for (i = 0; i < num_read_wqs; i++) {
3154                 rdma_lookup_put_uobject(&wqs[i]->uobject->uevent.uobject,
3155                                         UVERBS_LOOKUP_READ);
3156                 atomic_dec(&wqs[i]->usecnt);
3157         }
3158 err_free:
3159         kfree(wqs_handles);
3160         kfree(wqs);
3161         return err;
3162 }
3163
3164 static int ib_uverbs_ex_destroy_rwq_ind_table(struct uverbs_attr_bundle *attrs)
3165 {
3166         struct ib_uverbs_ex_destroy_rwq_ind_table cmd;
3167         int ret;
3168
3169         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3170         if (ret)
3171                 return ret;
3172
3173         if (cmd.comp_mask)
3174                 return -EOPNOTSUPP;
3175
3176         return uobj_perform_destroy(UVERBS_OBJECT_RWQ_IND_TBL,
3177                                     cmd.ind_tbl_handle, attrs);
3178 }
3179
3180 static int ib_uverbs_ex_create_flow(struct uverbs_attr_bundle *attrs)
3181 {
3182         struct ib_uverbs_create_flow      cmd;
3183         struct ib_uverbs_create_flow_resp resp = {};
3184         struct ib_uobject                 *uobj;
3185         struct ib_flow                    *flow_id;
3186         struct ib_uverbs_flow_attr        *kern_flow_attr;
3187         struct ib_flow_attr               *flow_attr;
3188         struct ib_qp                      *qp;
3189         struct ib_uflow_resources         *uflow_res;
3190         struct ib_uverbs_flow_spec_hdr    *kern_spec;
3191         struct uverbs_req_iter iter;
3192         int err;
3193         void *ib_spec;
3194         int i;
3195         struct ib_device *ib_dev;
3196
3197         err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
3198         if (err)
3199                 return err;
3200
3201         if (cmd.comp_mask)
3202                 return -EINVAL;
3203
3204         if (!capable(CAP_NET_RAW))
3205                 return -EPERM;
3206
3207         if (cmd.flow_attr.flags >= IB_FLOW_ATTR_FLAGS_RESERVED)
3208                 return -EINVAL;
3209
3210         if ((cmd.flow_attr.flags & IB_FLOW_ATTR_FLAGS_DONT_TRAP) &&
3211             ((cmd.flow_attr.type == IB_FLOW_ATTR_ALL_DEFAULT) ||
3212              (cmd.flow_attr.type == IB_FLOW_ATTR_MC_DEFAULT)))
3213                 return -EINVAL;
3214
3215         if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS)
3216                 return -EINVAL;
3217
3218         if (cmd.flow_attr.size >
3219             (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec)))
3220                 return -EINVAL;
3221
3222         if (cmd.flow_attr.reserved[0] ||
3223             cmd.flow_attr.reserved[1])
3224                 return -EINVAL;
3225
3226         if (cmd.flow_attr.num_of_specs) {
3227                 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size,
3228                                          GFP_KERNEL);
3229                 if (!kern_flow_attr)
3230                         return -ENOMEM;
3231
3232                 *kern_flow_attr = cmd.flow_attr;
3233                 err = uverbs_request_next(&iter, &kern_flow_attr->flow_specs,
3234                                           cmd.flow_attr.size);
3235                 if (err)
3236                         goto err_free_attr;
3237         } else {
3238                 kern_flow_attr = &cmd.flow_attr;
3239         }
3240
3241         err = uverbs_request_finish(&iter);
3242         if (err)
3243                 goto err_free_attr;
3244
3245         uobj = uobj_alloc(UVERBS_OBJECT_FLOW, attrs, &ib_dev);
3246         if (IS_ERR(uobj)) {
3247                 err = PTR_ERR(uobj);
3248                 goto err_free_attr;
3249         }
3250
3251         if (!rdma_is_port_valid(uobj->context->device, cmd.flow_attr.port)) {
3252                 err = -EINVAL;
3253                 goto err_uobj;
3254         }
3255
3256         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
3257         if (!qp) {
3258                 err = -EINVAL;
3259                 goto err_uobj;
3260         }
3261
3262         if (qp->qp_type != IB_QPT_UD && qp->qp_type != IB_QPT_RAW_PACKET) {
3263                 err = -EINVAL;
3264                 goto err_put;
3265         }
3266
3267         flow_attr = kzalloc(struct_size(flow_attr, flows,
3268                                 cmd.flow_attr.num_of_specs), GFP_KERNEL);
3269         if (!flow_attr) {
3270                 err = -ENOMEM;
3271                 goto err_put;
3272         }
3273         uflow_res = flow_resources_alloc(cmd.flow_attr.num_of_specs);
3274         if (!uflow_res) {
3275                 err = -ENOMEM;
3276                 goto err_free_flow_attr;
3277         }
3278
3279         flow_attr->type = kern_flow_attr->type;
3280         flow_attr->priority = kern_flow_attr->priority;
3281         flow_attr->num_of_specs = kern_flow_attr->num_of_specs;
3282         flow_attr->port = kern_flow_attr->port;
3283         flow_attr->flags = kern_flow_attr->flags;
3284         flow_attr->size = sizeof(*flow_attr);
3285
3286         kern_spec = kern_flow_attr->flow_specs;
3287         ib_spec = flow_attr + 1;
3288         for (i = 0; i < flow_attr->num_of_specs &&
3289                         cmd.flow_attr.size >= sizeof(*kern_spec) &&
3290                         cmd.flow_attr.size >= kern_spec->size;
3291              i++) {
3292                 err = kern_spec_to_ib_spec(
3293                                 attrs, (struct ib_uverbs_flow_spec *)kern_spec,
3294                                 ib_spec, uflow_res);
3295                 if (err)
3296                         goto err_free;
3297
3298                 flow_attr->size +=
3299                         ((union ib_flow_spec *) ib_spec)->size;
3300                 cmd.flow_attr.size -= kern_spec->size;
3301                 kern_spec = ((void *)kern_spec) + kern_spec->size;
3302                 ib_spec += ((union ib_flow_spec *) ib_spec)->size;
3303         }
3304         if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) {
3305                 pr_warn("create flow failed, flow %d: %d bytes left from uverb cmd\n",
3306                         i, cmd.flow_attr.size);
3307                 err = -EINVAL;
3308                 goto err_free;
3309         }
3310
3311         flow_id = qp->device->ops.create_flow(qp, flow_attr,
3312                                               &attrs->driver_udata);
3313
3314         if (IS_ERR(flow_id)) {
3315                 err = PTR_ERR(flow_id);
3316                 goto err_free;
3317         }
3318
3319         ib_set_flow(uobj, flow_id, qp, qp->device, uflow_res);
3320
3321         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
3322                                 UVERBS_LOOKUP_READ);
3323         kfree(flow_attr);
3324
3325         if (cmd.flow_attr.num_of_specs)
3326                 kfree(kern_flow_attr);
3327         uobj_finalize_uobj_create(uobj, attrs);
3328
3329         resp.flow_handle = uobj->id;
3330         return uverbs_response(attrs, &resp, sizeof(resp));
3331
3332 err_free:
3333         ib_uverbs_flow_resources_free(uflow_res);
3334 err_free_flow_attr:
3335         kfree(flow_attr);
3336 err_put:
3337         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
3338                                 UVERBS_LOOKUP_READ);
3339 err_uobj:
3340         uobj_alloc_abort(uobj, attrs);
3341 err_free_attr:
3342         if (cmd.flow_attr.num_of_specs)
3343                 kfree(kern_flow_attr);
3344         return err;
3345 }
3346
3347 static int ib_uverbs_ex_destroy_flow(struct uverbs_attr_bundle *attrs)
3348 {
3349         struct ib_uverbs_destroy_flow   cmd;
3350         int                             ret;
3351
3352         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3353         if (ret)
3354                 return ret;
3355
3356         if (cmd.comp_mask)
3357                 return -EINVAL;
3358
3359         return uobj_perform_destroy(UVERBS_OBJECT_FLOW, cmd.flow_handle, attrs);
3360 }
3361
3362 static int __uverbs_create_xsrq(struct uverbs_attr_bundle *attrs,
3363                                 struct ib_uverbs_create_xsrq *cmd,
3364                                 struct ib_udata *udata)
3365 {
3366         struct ib_uverbs_create_srq_resp resp = {};
3367         struct ib_usrq_object           *obj;
3368         struct ib_pd                    *pd;
3369         struct ib_srq                   *srq;
3370         struct ib_srq_init_attr          attr;
3371         int ret;
3372         struct ib_uobject *xrcd_uobj;
3373         struct ib_device *ib_dev;
3374
3375         obj = (struct ib_usrq_object *)uobj_alloc(UVERBS_OBJECT_SRQ, attrs,
3376                                                   &ib_dev);
3377         if (IS_ERR(obj))
3378                 return PTR_ERR(obj);
3379
3380         if (cmd->srq_type == IB_SRQT_TM)
3381                 attr.ext.tag_matching.max_num_tags = cmd->max_num_tags;
3382
3383         if (cmd->srq_type == IB_SRQT_XRC) {
3384                 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->xrcd_handle,
3385                                           attrs);
3386                 if (IS_ERR(xrcd_uobj)) {
3387                         ret = -EINVAL;
3388                         goto err;
3389                 }
3390
3391                 attr.ext.xrc.xrcd = (struct ib_xrcd *)xrcd_uobj->object;
3392                 if (!attr.ext.xrc.xrcd) {
3393                         ret = -EINVAL;
3394                         goto err_put_xrcd;
3395                 }
3396
3397                 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
3398                 atomic_inc(&obj->uxrcd->refcnt);
3399         }
3400
3401         if (ib_srq_has_cq(cmd->srq_type)) {
3402                 attr.ext.cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ,
3403                                                 cmd->cq_handle, attrs);
3404                 if (!attr.ext.cq) {
3405                         ret = -EINVAL;
3406                         goto err_put_xrcd;
3407                 }
3408         }
3409
3410         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle, attrs);
3411         if (!pd) {
3412                 ret = -EINVAL;
3413                 goto err_put_cq;
3414         }
3415
3416         attr.event_handler  = ib_uverbs_srq_event_handler;
3417         attr.srq_type       = cmd->srq_type;
3418         attr.attr.max_wr    = cmd->max_wr;
3419         attr.attr.max_sge   = cmd->max_sge;
3420         attr.attr.srq_limit = cmd->srq_limit;
3421
3422         INIT_LIST_HEAD(&obj->uevent.event_list);
3423         obj->uevent.uobject.user_handle = cmd->user_handle;
3424
3425         srq = ib_create_srq_user(pd, &attr, obj, udata);
3426         if (IS_ERR(srq)) {
3427                 ret = PTR_ERR(srq);
3428                 goto err_put_pd;
3429         }
3430
3431         obj->uevent.uobject.object = srq;
3432         obj->uevent.uobject.user_handle = cmd->user_handle;
3433         obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file);
3434         if (obj->uevent.event_file)
3435                 uverbs_uobject_get(&obj->uevent.event_file->uobj);
3436
3437         if (cmd->srq_type == IB_SRQT_XRC)
3438                 resp.srqn = srq->ext.xrc.srq_num;
3439
3440         if (cmd->srq_type == IB_SRQT_XRC)
3441                 uobj_put_read(xrcd_uobj);
3442
3443         if (ib_srq_has_cq(cmd->srq_type))
3444                 rdma_lookup_put_uobject(&attr.ext.cq->uobject->uevent.uobject,
3445                                         UVERBS_LOOKUP_READ);
3446
3447         uobj_put_obj_read(pd);
3448         uobj_finalize_uobj_create(&obj->uevent.uobject, attrs);
3449
3450         resp.srq_handle = obj->uevent.uobject.id;
3451         resp.max_wr = attr.attr.max_wr;
3452         resp.max_sge = attr.attr.max_sge;
3453         return uverbs_response(attrs, &resp, sizeof(resp));
3454
3455 err_put_pd:
3456         uobj_put_obj_read(pd);
3457 err_put_cq:
3458         if (ib_srq_has_cq(cmd->srq_type))
3459                 rdma_lookup_put_uobject(&attr.ext.cq->uobject->uevent.uobject,
3460                                         UVERBS_LOOKUP_READ);
3461
3462 err_put_xrcd:
3463         if (cmd->srq_type == IB_SRQT_XRC) {
3464                 atomic_dec(&obj->uxrcd->refcnt);
3465                 uobj_put_read(xrcd_uobj);
3466         }
3467
3468 err:
3469         uobj_alloc_abort(&obj->uevent.uobject, attrs);
3470         return ret;
3471 }
3472
3473 static int ib_uverbs_create_srq(struct uverbs_attr_bundle *attrs)
3474 {
3475         struct ib_uverbs_create_srq      cmd;
3476         struct ib_uverbs_create_xsrq     xcmd;
3477         int ret;
3478
3479         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3480         if (ret)
3481                 return ret;
3482
3483         memset(&xcmd, 0, sizeof(xcmd));
3484         xcmd.response    = cmd.response;
3485         xcmd.user_handle = cmd.user_handle;
3486         xcmd.srq_type    = IB_SRQT_BASIC;
3487         xcmd.pd_handle   = cmd.pd_handle;
3488         xcmd.max_wr      = cmd.max_wr;
3489         xcmd.max_sge     = cmd.max_sge;
3490         xcmd.srq_limit   = cmd.srq_limit;
3491
3492         return __uverbs_create_xsrq(attrs, &xcmd, &attrs->driver_udata);
3493 }
3494
3495 static int ib_uverbs_create_xsrq(struct uverbs_attr_bundle *attrs)
3496 {
3497         struct ib_uverbs_create_xsrq     cmd;
3498         int ret;
3499
3500         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3501         if (ret)
3502                 return ret;
3503
3504         return __uverbs_create_xsrq(attrs, &cmd, &attrs->driver_udata);
3505 }
3506
3507 static int ib_uverbs_modify_srq(struct uverbs_attr_bundle *attrs)
3508 {
3509         struct ib_uverbs_modify_srq cmd;
3510         struct ib_srq              *srq;
3511         struct ib_srq_attr          attr;
3512         int                         ret;
3513
3514         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3515         if (ret)
3516                 return ret;
3517
3518         srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
3519         if (!srq)
3520                 return -EINVAL;
3521
3522         attr.max_wr    = cmd.max_wr;
3523         attr.srq_limit = cmd.srq_limit;
3524
3525         ret = srq->device->ops.modify_srq(srq, &attr, cmd.attr_mask,
3526                                           &attrs->driver_udata);
3527
3528         rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
3529                                 UVERBS_LOOKUP_READ);
3530
3531         return ret;
3532 }
3533
3534 static int ib_uverbs_query_srq(struct uverbs_attr_bundle *attrs)
3535 {
3536         struct ib_uverbs_query_srq      cmd;
3537         struct ib_uverbs_query_srq_resp resp;
3538         struct ib_srq_attr              attr;
3539         struct ib_srq                   *srq;
3540         int                             ret;
3541
3542         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3543         if (ret)
3544                 return ret;
3545
3546         srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
3547         if (!srq)
3548                 return -EINVAL;
3549
3550         ret = ib_query_srq(srq, &attr);
3551
3552         rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
3553                                 UVERBS_LOOKUP_READ);
3554
3555         if (ret)
3556                 return ret;
3557
3558         memset(&resp, 0, sizeof resp);
3559
3560         resp.max_wr    = attr.max_wr;
3561         resp.max_sge   = attr.max_sge;
3562         resp.srq_limit = attr.srq_limit;
3563
3564         return uverbs_response(attrs, &resp, sizeof(resp));
3565 }
3566
3567 static int ib_uverbs_destroy_srq(struct uverbs_attr_bundle *attrs)
3568 {
3569         struct ib_uverbs_destroy_srq      cmd;
3570         struct ib_uverbs_destroy_srq_resp resp;
3571         struct ib_uobject                *uobj;
3572         struct ib_uevent_object          *obj;
3573         int ret;
3574
3575         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3576         if (ret)
3577                 return ret;
3578
3579         uobj = uobj_get_destroy(UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
3580         if (IS_ERR(uobj))
3581                 return PTR_ERR(uobj);
3582
3583         obj = container_of(uobj, struct ib_uevent_object, uobject);
3584         memset(&resp, 0, sizeof(resp));
3585         resp.events_reported = obj->events_reported;
3586
3587         uobj_put_destroy(uobj);
3588
3589         return uverbs_response(attrs, &resp, sizeof(resp));
3590 }
3591
3592 static int ib_uverbs_ex_query_device(struct uverbs_attr_bundle *attrs)
3593 {
3594         struct ib_uverbs_ex_query_device_resp resp = {};
3595         struct ib_uverbs_ex_query_device  cmd;
3596         struct ib_device_attr attr = {0};
3597         struct ib_ucontext *ucontext;
3598         struct ib_device *ib_dev;
3599         int err;
3600
3601         ucontext = ib_uverbs_get_ucontext(attrs);
3602         if (IS_ERR(ucontext))
3603                 return PTR_ERR(ucontext);
3604         ib_dev = ucontext->device;
3605
3606         err = uverbs_request(attrs, &cmd, sizeof(cmd));
3607         if (err)
3608                 return err;
3609
3610         if (cmd.comp_mask)
3611                 return -EINVAL;
3612
3613         if (cmd.reserved)
3614                 return -EINVAL;
3615
3616         err = ib_dev->ops.query_device(ib_dev, &attr, &attrs->driver_udata);
3617         if (err)
3618                 return err;
3619
3620         copy_query_dev_fields(ucontext, &resp.base, &attr);
3621
3622         resp.odp_caps.general_caps = attr.odp_caps.general_caps;
3623         resp.odp_caps.per_transport_caps.rc_odp_caps =
3624                 attr.odp_caps.per_transport_caps.rc_odp_caps;
3625         resp.odp_caps.per_transport_caps.uc_odp_caps =
3626                 attr.odp_caps.per_transport_caps.uc_odp_caps;
3627         resp.odp_caps.per_transport_caps.ud_odp_caps =
3628                 attr.odp_caps.per_transport_caps.ud_odp_caps;
3629         resp.xrc_odp_caps = attr.odp_caps.per_transport_caps.xrc_odp_caps;
3630
3631         resp.timestamp_mask = attr.timestamp_mask;
3632         resp.hca_core_clock = attr.hca_core_clock;
3633         resp.device_cap_flags_ex = attr.device_cap_flags;
3634         resp.rss_caps.supported_qpts = attr.rss_caps.supported_qpts;
3635         resp.rss_caps.max_rwq_indirection_tables =
3636                 attr.rss_caps.max_rwq_indirection_tables;
3637         resp.rss_caps.max_rwq_indirection_table_size =
3638                 attr.rss_caps.max_rwq_indirection_table_size;
3639         resp.max_wq_type_rq = attr.max_wq_type_rq;
3640         resp.raw_packet_caps = attr.raw_packet_caps;
3641         resp.tm_caps.max_rndv_hdr_size  = attr.tm_caps.max_rndv_hdr_size;
3642         resp.tm_caps.max_num_tags       = attr.tm_caps.max_num_tags;
3643         resp.tm_caps.max_ops            = attr.tm_caps.max_ops;
3644         resp.tm_caps.max_sge            = attr.tm_caps.max_sge;
3645         resp.tm_caps.flags              = attr.tm_caps.flags;
3646         resp.cq_moderation_caps.max_cq_moderation_count  =
3647                 attr.cq_caps.max_cq_moderation_count;
3648         resp.cq_moderation_caps.max_cq_moderation_period =
3649                 attr.cq_caps.max_cq_moderation_period;
3650         resp.max_dm_size = attr.max_dm_size;
3651         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
3652
3653         return uverbs_response(attrs, &resp, sizeof(resp));
3654 }
3655
3656 static int ib_uverbs_ex_modify_cq(struct uverbs_attr_bundle *attrs)
3657 {
3658         struct ib_uverbs_ex_modify_cq cmd;
3659         struct ib_cq *cq;
3660         int ret;
3661
3662         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3663         if (ret)
3664                 return ret;
3665
3666         if (!cmd.attr_mask || cmd.reserved)
3667                 return -EINVAL;
3668
3669         if (cmd.attr_mask > IB_CQ_MODERATE)
3670                 return -EOPNOTSUPP;
3671
3672         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
3673         if (!cq)
3674                 return -EINVAL;
3675
3676         ret = rdma_set_cq_moderation(cq, cmd.attr.cq_count, cmd.attr.cq_period);
3677
3678         rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
3679                                 UVERBS_LOOKUP_READ);
3680         return ret;
3681 }
3682
3683 /*
3684  * Describe the input structs for write(). Some write methods have an input
3685  * only struct, most have an input and output. If the struct has an output then
3686  * the 'response' u64 must be the first field in the request structure.
3687  *
3688  * If udata is present then both the request and response structs have a
3689  * trailing driver_data flex array. In this case the size of the base struct
3690  * cannot be changed.
3691  */
3692 #define UAPI_DEF_WRITE_IO(req, resp)                                           \
3693         .write.has_resp = 1 +                                                  \
3694                           BUILD_BUG_ON_ZERO(offsetof(req, response) != 0) +    \
3695                           BUILD_BUG_ON_ZERO(sizeof_field(req, response) !=    \
3696                                             sizeof(u64)),                      \
3697         .write.req_size = sizeof(req), .write.resp_size = sizeof(resp)
3698
3699 #define UAPI_DEF_WRITE_I(req) .write.req_size = sizeof(req)
3700
3701 #define UAPI_DEF_WRITE_UDATA_IO(req, resp)                                     \
3702         UAPI_DEF_WRITE_IO(req, resp),                                          \
3703                 .write.has_udata =                                             \
3704                         1 +                                                    \
3705                         BUILD_BUG_ON_ZERO(offsetof(req, driver_data) !=        \
3706                                           sizeof(req)) +                       \
3707                         BUILD_BUG_ON_ZERO(offsetof(resp, driver_data) !=       \
3708                                           sizeof(resp))
3709
3710 #define UAPI_DEF_WRITE_UDATA_I(req)                                            \
3711         UAPI_DEF_WRITE_I(req),                                                 \
3712                 .write.has_udata =                                             \
3713                         1 + BUILD_BUG_ON_ZERO(offsetof(req, driver_data) !=    \
3714                                               sizeof(req))
3715
3716 /*
3717  * The _EX versions are for use with WRITE_EX and allow the last struct member
3718  * to be specified. Buffers that do not include that member will be rejected.
3719  */
3720 #define UAPI_DEF_WRITE_IO_EX(req, req_last_member, resp, resp_last_member)     \
3721         .write.has_resp = 1,                                                   \
3722         .write.req_size = offsetofend(req, req_last_member),                   \
3723         .write.resp_size = offsetofend(resp, resp_last_member)
3724
3725 #define UAPI_DEF_WRITE_I_EX(req, req_last_member)                              \
3726         .write.req_size = offsetofend(req, req_last_member)
3727
3728 const struct uapi_definition uverbs_def_write_intf[] = {
3729         DECLARE_UVERBS_OBJECT(
3730                 UVERBS_OBJECT_AH,
3731                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_AH,
3732                                      ib_uverbs_create_ah,
3733                                      UAPI_DEF_WRITE_UDATA_IO(
3734                                              struct ib_uverbs_create_ah,
3735                                              struct ib_uverbs_create_ah_resp)),
3736                 DECLARE_UVERBS_WRITE(
3737                         IB_USER_VERBS_CMD_DESTROY_AH,
3738                         ib_uverbs_destroy_ah,
3739                         UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_ah)),
3740                 UAPI_DEF_OBJ_NEEDS_FN(create_user_ah),
3741                 UAPI_DEF_OBJ_NEEDS_FN(destroy_ah)),
3742
3743         DECLARE_UVERBS_OBJECT(
3744                 UVERBS_OBJECT_COMP_CHANNEL,
3745                 DECLARE_UVERBS_WRITE(
3746                         IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL,
3747                         ib_uverbs_create_comp_channel,
3748                         UAPI_DEF_WRITE_IO(
3749                                 struct ib_uverbs_create_comp_channel,
3750                                 struct ib_uverbs_create_comp_channel_resp))),
3751
3752         DECLARE_UVERBS_OBJECT(
3753                 UVERBS_OBJECT_CQ,
3754                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_CQ,
3755                                      ib_uverbs_create_cq,
3756                                      UAPI_DEF_WRITE_UDATA_IO(
3757                                              struct ib_uverbs_create_cq,
3758                                              struct ib_uverbs_create_cq_resp),
3759                                      UAPI_DEF_METHOD_NEEDS_FN(create_cq)),
3760                 DECLARE_UVERBS_WRITE(
3761                         IB_USER_VERBS_CMD_DESTROY_CQ,
3762                         ib_uverbs_destroy_cq,
3763                         UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_cq,
3764                                           struct ib_uverbs_destroy_cq_resp),
3765                         UAPI_DEF_METHOD_NEEDS_FN(destroy_cq)),
3766                 DECLARE_UVERBS_WRITE(
3767                         IB_USER_VERBS_CMD_POLL_CQ,
3768                         ib_uverbs_poll_cq,
3769                         UAPI_DEF_WRITE_IO(struct ib_uverbs_poll_cq,
3770                                           struct ib_uverbs_poll_cq_resp),
3771                         UAPI_DEF_METHOD_NEEDS_FN(poll_cq)),
3772                 DECLARE_UVERBS_WRITE(
3773                         IB_USER_VERBS_CMD_REQ_NOTIFY_CQ,
3774                         ib_uverbs_req_notify_cq,
3775                         UAPI_DEF_WRITE_I(struct ib_uverbs_req_notify_cq),
3776                         UAPI_DEF_METHOD_NEEDS_FN(req_notify_cq)),
3777                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_RESIZE_CQ,
3778                                      ib_uverbs_resize_cq,
3779                                      UAPI_DEF_WRITE_UDATA_IO(
3780                                              struct ib_uverbs_resize_cq,
3781                                              struct ib_uverbs_resize_cq_resp),
3782                                      UAPI_DEF_METHOD_NEEDS_FN(resize_cq)),
3783                 DECLARE_UVERBS_WRITE_EX(
3784                         IB_USER_VERBS_EX_CMD_CREATE_CQ,
3785                         ib_uverbs_ex_create_cq,
3786                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_cq,
3787                                              reserved,
3788                                              struct ib_uverbs_ex_create_cq_resp,
3789                                              response_length),
3790                         UAPI_DEF_METHOD_NEEDS_FN(create_cq)),
3791                 DECLARE_UVERBS_WRITE_EX(
3792                         IB_USER_VERBS_EX_CMD_MODIFY_CQ,
3793                         ib_uverbs_ex_modify_cq,
3794                         UAPI_DEF_WRITE_I(struct ib_uverbs_ex_modify_cq),
3795                         UAPI_DEF_METHOD_NEEDS_FN(modify_cq))),
3796
3797         DECLARE_UVERBS_OBJECT(
3798                 UVERBS_OBJECT_DEVICE,
3799                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_GET_CONTEXT,
3800                                      ib_uverbs_get_context,
3801                                      UAPI_DEF_WRITE_UDATA_IO(
3802                                              struct ib_uverbs_get_context,
3803                                              struct ib_uverbs_get_context_resp)),
3804                 DECLARE_UVERBS_WRITE(
3805                         IB_USER_VERBS_CMD_QUERY_DEVICE,
3806                         ib_uverbs_query_device,
3807                         UAPI_DEF_WRITE_IO(struct ib_uverbs_query_device,
3808                                           struct ib_uverbs_query_device_resp)),
3809                 DECLARE_UVERBS_WRITE(
3810                         IB_USER_VERBS_CMD_QUERY_PORT,
3811                         ib_uverbs_query_port,
3812                         UAPI_DEF_WRITE_IO(struct ib_uverbs_query_port,
3813                                           struct ib_uverbs_query_port_resp),
3814                         UAPI_DEF_METHOD_NEEDS_FN(query_port)),
3815                 DECLARE_UVERBS_WRITE_EX(
3816                         IB_USER_VERBS_EX_CMD_QUERY_DEVICE,
3817                         ib_uverbs_ex_query_device,
3818                         UAPI_DEF_WRITE_IO_EX(
3819                                 struct ib_uverbs_ex_query_device,
3820                                 reserved,
3821                                 struct ib_uverbs_ex_query_device_resp,
3822                                 response_length),
3823                         UAPI_DEF_METHOD_NEEDS_FN(query_device)),
3824                 UAPI_DEF_OBJ_NEEDS_FN(alloc_ucontext),
3825                 UAPI_DEF_OBJ_NEEDS_FN(dealloc_ucontext)),
3826
3827         DECLARE_UVERBS_OBJECT(
3828                 UVERBS_OBJECT_FLOW,
3829                 DECLARE_UVERBS_WRITE_EX(
3830                         IB_USER_VERBS_EX_CMD_CREATE_FLOW,
3831                         ib_uverbs_ex_create_flow,
3832                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_create_flow,
3833                                              flow_attr,
3834                                              struct ib_uverbs_create_flow_resp,
3835                                              flow_handle),
3836                         UAPI_DEF_METHOD_NEEDS_FN(create_flow)),
3837                 DECLARE_UVERBS_WRITE_EX(
3838                         IB_USER_VERBS_EX_CMD_DESTROY_FLOW,
3839                         ib_uverbs_ex_destroy_flow,
3840                         UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_flow),
3841                         UAPI_DEF_METHOD_NEEDS_FN(destroy_flow))),
3842
3843         DECLARE_UVERBS_OBJECT(
3844                 UVERBS_OBJECT_MR,
3845                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_DEREG_MR,
3846                                      ib_uverbs_dereg_mr,
3847                                      UAPI_DEF_WRITE_I(struct ib_uverbs_dereg_mr),
3848                                      UAPI_DEF_METHOD_NEEDS_FN(dereg_mr)),
3849                 DECLARE_UVERBS_WRITE(
3850                         IB_USER_VERBS_CMD_REG_MR,
3851                         ib_uverbs_reg_mr,
3852                         UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_reg_mr,
3853                                                 struct ib_uverbs_reg_mr_resp),
3854                         UAPI_DEF_METHOD_NEEDS_FN(reg_user_mr)),
3855                 DECLARE_UVERBS_WRITE(
3856                         IB_USER_VERBS_CMD_REREG_MR,
3857                         ib_uverbs_rereg_mr,
3858                         UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_rereg_mr,
3859                                                 struct ib_uverbs_rereg_mr_resp),
3860                         UAPI_DEF_METHOD_NEEDS_FN(rereg_user_mr))),
3861
3862         DECLARE_UVERBS_OBJECT(
3863                 UVERBS_OBJECT_MW,
3864                 DECLARE_UVERBS_WRITE(
3865                         IB_USER_VERBS_CMD_ALLOC_MW,
3866                         ib_uverbs_alloc_mw,
3867                         UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_mw,
3868                                                 struct ib_uverbs_alloc_mw_resp),
3869                         UAPI_DEF_METHOD_NEEDS_FN(alloc_mw)),
3870                 DECLARE_UVERBS_WRITE(
3871                         IB_USER_VERBS_CMD_DEALLOC_MW,
3872                         ib_uverbs_dealloc_mw,
3873                         UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_mw),
3874                         UAPI_DEF_METHOD_NEEDS_FN(dealloc_mw))),
3875
3876         DECLARE_UVERBS_OBJECT(
3877                 UVERBS_OBJECT_PD,
3878                 DECLARE_UVERBS_WRITE(
3879                         IB_USER_VERBS_CMD_ALLOC_PD,
3880                         ib_uverbs_alloc_pd,
3881                         UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_pd,
3882                                                 struct ib_uverbs_alloc_pd_resp),
3883                         UAPI_DEF_METHOD_NEEDS_FN(alloc_pd)),
3884                 DECLARE_UVERBS_WRITE(
3885                         IB_USER_VERBS_CMD_DEALLOC_PD,
3886                         ib_uverbs_dealloc_pd,
3887                         UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_pd),
3888                         UAPI_DEF_METHOD_NEEDS_FN(dealloc_pd))),
3889
3890         DECLARE_UVERBS_OBJECT(
3891                 UVERBS_OBJECT_QP,
3892                 DECLARE_UVERBS_WRITE(
3893                         IB_USER_VERBS_CMD_ATTACH_MCAST,
3894                         ib_uverbs_attach_mcast,
3895                         UAPI_DEF_WRITE_I(struct ib_uverbs_attach_mcast),
3896                         UAPI_DEF_METHOD_NEEDS_FN(attach_mcast),
3897                         UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)),
3898                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_QP,
3899                                      ib_uverbs_create_qp,
3900                                      UAPI_DEF_WRITE_UDATA_IO(
3901                                              struct ib_uverbs_create_qp,
3902                                              struct ib_uverbs_create_qp_resp),
3903                                      UAPI_DEF_METHOD_NEEDS_FN(create_qp)),
3904                 DECLARE_UVERBS_WRITE(
3905                         IB_USER_VERBS_CMD_DESTROY_QP,
3906                         ib_uverbs_destroy_qp,
3907                         UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_qp,
3908                                           struct ib_uverbs_destroy_qp_resp),
3909                         UAPI_DEF_METHOD_NEEDS_FN(destroy_qp)),
3910                 DECLARE_UVERBS_WRITE(
3911                         IB_USER_VERBS_CMD_DETACH_MCAST,
3912                         ib_uverbs_detach_mcast,
3913                         UAPI_DEF_WRITE_I(struct ib_uverbs_detach_mcast),
3914                         UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)),
3915                 DECLARE_UVERBS_WRITE(
3916                         IB_USER_VERBS_CMD_MODIFY_QP,
3917                         ib_uverbs_modify_qp,
3918                         UAPI_DEF_WRITE_I(struct ib_uverbs_modify_qp),
3919                         UAPI_DEF_METHOD_NEEDS_FN(modify_qp)),
3920                 DECLARE_UVERBS_WRITE(
3921                         IB_USER_VERBS_CMD_POST_RECV,
3922                         ib_uverbs_post_recv,
3923                         UAPI_DEF_WRITE_IO(struct ib_uverbs_post_recv,
3924                                           struct ib_uverbs_post_recv_resp),
3925                         UAPI_DEF_METHOD_NEEDS_FN(post_recv)),
3926                 DECLARE_UVERBS_WRITE(
3927                         IB_USER_VERBS_CMD_POST_SEND,
3928                         ib_uverbs_post_send,
3929                         UAPI_DEF_WRITE_IO(struct ib_uverbs_post_send,
3930                                           struct ib_uverbs_post_send_resp),
3931                         UAPI_DEF_METHOD_NEEDS_FN(post_send)),
3932                 DECLARE_UVERBS_WRITE(
3933                         IB_USER_VERBS_CMD_QUERY_QP,
3934                         ib_uverbs_query_qp,
3935                         UAPI_DEF_WRITE_IO(struct ib_uverbs_query_qp,
3936                                           struct ib_uverbs_query_qp_resp),
3937                         UAPI_DEF_METHOD_NEEDS_FN(query_qp)),
3938                 DECLARE_UVERBS_WRITE_EX(
3939                         IB_USER_VERBS_EX_CMD_CREATE_QP,
3940                         ib_uverbs_ex_create_qp,
3941                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_qp,
3942                                              comp_mask,
3943                                              struct ib_uverbs_ex_create_qp_resp,
3944                                              response_length),
3945                         UAPI_DEF_METHOD_NEEDS_FN(create_qp)),
3946                 DECLARE_UVERBS_WRITE_EX(
3947                         IB_USER_VERBS_EX_CMD_MODIFY_QP,
3948                         ib_uverbs_ex_modify_qp,
3949                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_modify_qp,
3950                                              base,
3951                                              struct ib_uverbs_ex_modify_qp_resp,
3952                                              response_length),
3953                         UAPI_DEF_METHOD_NEEDS_FN(modify_qp))),
3954
3955         DECLARE_UVERBS_OBJECT(
3956                 UVERBS_OBJECT_RWQ_IND_TBL,
3957                 DECLARE_UVERBS_WRITE_EX(
3958                         IB_USER_VERBS_EX_CMD_CREATE_RWQ_IND_TBL,
3959                         ib_uverbs_ex_create_rwq_ind_table,
3960                         UAPI_DEF_WRITE_IO_EX(
3961                                 struct ib_uverbs_ex_create_rwq_ind_table,
3962                                 log_ind_tbl_size,
3963                                 struct ib_uverbs_ex_create_rwq_ind_table_resp,
3964                                 ind_tbl_num),
3965                         UAPI_DEF_METHOD_NEEDS_FN(create_rwq_ind_table)),
3966                 DECLARE_UVERBS_WRITE_EX(
3967                         IB_USER_VERBS_EX_CMD_DESTROY_RWQ_IND_TBL,
3968                         ib_uverbs_ex_destroy_rwq_ind_table,
3969                         UAPI_DEF_WRITE_I(
3970                                 struct ib_uverbs_ex_destroy_rwq_ind_table),
3971                         UAPI_DEF_METHOD_NEEDS_FN(destroy_rwq_ind_table))),
3972
3973         DECLARE_UVERBS_OBJECT(
3974                 UVERBS_OBJECT_WQ,
3975                 DECLARE_UVERBS_WRITE_EX(
3976                         IB_USER_VERBS_EX_CMD_CREATE_WQ,
3977                         ib_uverbs_ex_create_wq,
3978                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_wq,
3979                                              max_sge,
3980                                              struct ib_uverbs_ex_create_wq_resp,
3981                                              wqn),
3982                         UAPI_DEF_METHOD_NEEDS_FN(create_wq)),
3983                 DECLARE_UVERBS_WRITE_EX(
3984                         IB_USER_VERBS_EX_CMD_DESTROY_WQ,
3985                         ib_uverbs_ex_destroy_wq,
3986                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_destroy_wq,
3987                                              wq_handle,
3988                                              struct ib_uverbs_ex_destroy_wq_resp,
3989                                              reserved),
3990                         UAPI_DEF_METHOD_NEEDS_FN(destroy_wq)),
3991                 DECLARE_UVERBS_WRITE_EX(
3992                         IB_USER_VERBS_EX_CMD_MODIFY_WQ,
3993                         ib_uverbs_ex_modify_wq,
3994                         UAPI_DEF_WRITE_I_EX(struct ib_uverbs_ex_modify_wq,
3995                                             curr_wq_state),
3996                         UAPI_DEF_METHOD_NEEDS_FN(modify_wq))),
3997
3998         DECLARE_UVERBS_OBJECT(
3999                 UVERBS_OBJECT_SRQ,
4000                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_SRQ,
4001                                      ib_uverbs_create_srq,
4002                                      UAPI_DEF_WRITE_UDATA_IO(
4003                                              struct ib_uverbs_create_srq,
4004                                              struct ib_uverbs_create_srq_resp),
4005                                      UAPI_DEF_METHOD_NEEDS_FN(create_srq)),
4006                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_XSRQ,
4007                                      ib_uverbs_create_xsrq,
4008                                      UAPI_DEF_WRITE_UDATA_IO(
4009                                              struct ib_uverbs_create_xsrq,
4010                                              struct ib_uverbs_create_srq_resp),
4011                                      UAPI_DEF_METHOD_NEEDS_FN(create_srq)),
4012                 DECLARE_UVERBS_WRITE(
4013                         IB_USER_VERBS_CMD_DESTROY_SRQ,
4014                         ib_uverbs_destroy_srq,
4015                         UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_srq,
4016                                           struct ib_uverbs_destroy_srq_resp),
4017                         UAPI_DEF_METHOD_NEEDS_FN(destroy_srq)),
4018                 DECLARE_UVERBS_WRITE(
4019                         IB_USER_VERBS_CMD_MODIFY_SRQ,
4020                         ib_uverbs_modify_srq,
4021                         UAPI_DEF_WRITE_UDATA_I(struct ib_uverbs_modify_srq),
4022                         UAPI_DEF_METHOD_NEEDS_FN(modify_srq)),
4023                 DECLARE_UVERBS_WRITE(
4024                         IB_USER_VERBS_CMD_POST_SRQ_RECV,
4025                         ib_uverbs_post_srq_recv,
4026                         UAPI_DEF_WRITE_IO(struct ib_uverbs_post_srq_recv,
4027                                           struct ib_uverbs_post_srq_recv_resp),
4028                         UAPI_DEF_METHOD_NEEDS_FN(post_srq_recv)),
4029                 DECLARE_UVERBS_WRITE(
4030                         IB_USER_VERBS_CMD_QUERY_SRQ,
4031                         ib_uverbs_query_srq,
4032                         UAPI_DEF_WRITE_IO(struct ib_uverbs_query_srq,
4033                                           struct ib_uverbs_query_srq_resp),
4034                         UAPI_DEF_METHOD_NEEDS_FN(query_srq))),
4035
4036         DECLARE_UVERBS_OBJECT(
4037                 UVERBS_OBJECT_XRCD,
4038                 DECLARE_UVERBS_WRITE(
4039                         IB_USER_VERBS_CMD_CLOSE_XRCD,
4040                         ib_uverbs_close_xrcd,
4041                         UAPI_DEF_WRITE_I(struct ib_uverbs_close_xrcd)),
4042                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_QP,
4043                                      ib_uverbs_open_qp,
4044                                      UAPI_DEF_WRITE_UDATA_IO(
4045                                              struct ib_uverbs_open_qp,
4046                                              struct ib_uverbs_create_qp_resp)),
4047                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_XRCD,
4048                                      ib_uverbs_open_xrcd,
4049                                      UAPI_DEF_WRITE_UDATA_IO(
4050                                              struct ib_uverbs_open_xrcd,
4051                                              struct ib_uverbs_open_xrcd_resp)),
4052                 UAPI_DEF_OBJ_NEEDS_FN(alloc_xrcd),
4053                 UAPI_DEF_OBJ_NEEDS_FN(dealloc_xrcd)),
4054
4055         {},
4056 };