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 (len > iter->end - iter->cur)
 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 = EMPTY_FD;
 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 (fd_empty(f)) {
 588                         ret = -EBADF;
 589                         goto err_tree_mutex_unlock;
 590                 }
 591
 592                 inode = file_inode(fd_file(f));
 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         fdput(f);
 636
 637         mutex_unlock(&ibudev->xrcd_tree_mutex);
 638         uobj_finalize_uobj_create(&obj->uobject, attrs);
 639
 640         resp.xrcd_handle = obj->uobject.id;
 641         return uverbs_response(attrs, &resp, sizeof(resp));
 642
 643 err_dealloc_xrcd:
 644         ib_dealloc_xrcd_user(xrcd, uverbs_get_cleared_udata(attrs));
 645
 646 err:
 647         uobj_alloc_abort(&obj->uobject, attrs);
 648
 649 err_tree_mutex_unlock:
 650         fdput(f);
 651
 652         mutex_unlock(&ibudev->xrcd_tree_mutex);
 653
 654         return ret;
 655 }
 656
 657 static int ib_uverbs_close_xrcd(struct uverbs_attr_bundle *attrs)
 658 {
 659         struct ib_uverbs_close_xrcd cmd;
 660         int ret;
 661
 662         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 663         if (ret)
 664                 return ret;
 665
 666         return uobj_perform_destroy(UVERBS_OBJECT_XRCD, cmd.xrcd_handle, attrs);
 667 }
 668
 669 int ib_uverbs_dealloc_xrcd(struct ib_uobject *uobject, struct ib_xrcd *xrcd,
 670                            enum rdma_remove_reason why,
 671                            struct uverbs_attr_bundle *attrs)
 672 {
 673         struct inode *inode;
 674         int ret;
 675         struct ib_uverbs_device *dev = attrs->ufile->device;
 676
 677         inode = xrcd->inode;
 678         if (inode && !atomic_dec_and_test(&xrcd->usecnt))
 679                 return 0;
 680
 681         ret = ib_dealloc_xrcd_user(xrcd, &attrs->driver_udata);
 682         if (ret) {
 683                 atomic_inc(&xrcd->usecnt);
 684                 return ret;
 685         }
 686
 687         if (inode)
 688                 xrcd_table_delete(dev, inode);
 689
 690         return 0;
 691 }
 692
 693 static int ib_uverbs_reg_mr(struct uverbs_attr_bundle *attrs)
 694 {
 695         struct ib_uverbs_reg_mr_resp resp = {};
 696         struct ib_uverbs_reg_mr      cmd;
 697         struct ib_uobject           *uobj;
 698         struct ib_pd                *pd;
 699         struct ib_mr                *mr;
 700         int                          ret;
 701         struct ib_device *ib_dev;
 702
 703         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 704         if (ret)
 705                 return ret;
 706
 707         if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
 708                 return -EINVAL;
 709
 710         uobj = uobj_alloc(UVERBS_OBJECT_MR, attrs, &ib_dev);
 711         if (IS_ERR(uobj))
 712                 return PTR_ERR(uobj);
 713
 714         ret = ib_check_mr_access(ib_dev, cmd.access_flags);
 715         if (ret)
 716                 goto err_free;
 717
 718         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
 719         if (!pd) {
 720                 ret = -EINVAL;
 721                 goto err_free;
 722         }
 723
 724         mr = pd->device->ops.reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
 725                                          cmd.access_flags,
 726                                          &attrs->driver_udata);
 727         if (IS_ERR(mr)) {
 728                 ret = PTR_ERR(mr);
 729                 goto err_put;
 730         }
 731
 732         mr->device  = pd->device;
 733         mr->pd      = pd;
 734         mr->type    = IB_MR_TYPE_USER;
 735         mr->dm      = NULL;
 736         mr->sig_attrs = NULL;
 737         mr->uobject = uobj;
 738         atomic_inc(&pd->usecnt);
 739         mr->iova = cmd.hca_va;
 740         mr->length = cmd.length;
 741
 742         rdma_restrack_new(&mr->res, RDMA_RESTRACK_MR);
 743         rdma_restrack_set_name(&mr->res, NULL);
 744         rdma_restrack_add(&mr->res);
 745
 746         uobj->object = mr;
 747         uobj_put_obj_read(pd);
 748         uobj_finalize_uobj_create(uobj, attrs);
 749
 750         resp.lkey = mr->lkey;
 751         resp.rkey = mr->rkey;
 752         resp.mr_handle = uobj->id;
 753         return uverbs_response(attrs, &resp, sizeof(resp));
 754
 755 err_put:
 756         uobj_put_obj_read(pd);
 757 err_free:
 758         uobj_alloc_abort(uobj, attrs);
 759         return ret;
 760 }
 761
 762 static int ib_uverbs_rereg_mr(struct uverbs_attr_bundle *attrs)
 763 {
 764         struct ib_uverbs_rereg_mr      cmd;
 765         struct ib_uverbs_rereg_mr_resp resp;
 766         struct ib_mr                *mr;
 767         int                          ret;
 768         struct ib_uobject           *uobj;
 769         struct ib_uobject *new_uobj;
 770         struct ib_device *ib_dev;
 771         struct ib_pd *orig_pd;
 772         struct ib_pd *new_pd;
 773         struct ib_mr *new_mr;
 774
 775         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 776         if (ret)
 777                 return ret;
 778
 779         if (!cmd.flags)
 780                 return -EINVAL;
 781
 782         if (cmd.flags & ~IB_MR_REREG_SUPPORTED)
 783                 return -EOPNOTSUPP;
 784
 785         if ((cmd.flags & IB_MR_REREG_TRANS) &&
 786             (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
 787                 return -EINVAL;
 788
 789         uobj = uobj_get_write(UVERBS_OBJECT_MR, cmd.mr_handle, attrs);
 790         if (IS_ERR(uobj))
 791                 return PTR_ERR(uobj);
 792
 793         mr = uobj->object;
 794
 795         if (mr->dm) {
 796                 ret = -EINVAL;
 797                 goto put_uobjs;
 798         }
 799
 800         if (cmd.flags & IB_MR_REREG_ACCESS) {
 801                 ret = ib_check_mr_access(mr->device, cmd.access_flags);
 802                 if (ret)
 803                         goto put_uobjs;
 804         }
 805
 806         orig_pd = mr->pd;
 807         if (cmd.flags & IB_MR_REREG_PD) {
 808                 new_pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle,
 809                                            attrs);
 810                 if (!new_pd) {
 811                         ret = -EINVAL;
 812                         goto put_uobjs;
 813                 }
 814         } else {
 815                 new_pd = mr->pd;
 816         }
 817
 818         /*
 819          * The driver might create a new HW object as part of the rereg, we need
 820          * to have a uobject ready to hold it.
 821          */
 822         new_uobj = uobj_alloc(UVERBS_OBJECT_MR, attrs, &ib_dev);
 823         if (IS_ERR(new_uobj)) {
 824                 ret = PTR_ERR(new_uobj);
 825                 goto put_uobj_pd;
 826         }
 827
 828         new_mr = ib_dev->ops.rereg_user_mr(mr, cmd.flags, cmd.start, cmd.length,
 829                                            cmd.hca_va, cmd.access_flags, new_pd,
 830                                            &attrs->driver_udata);
 831         if (IS_ERR(new_mr)) {
 832                 ret = PTR_ERR(new_mr);
 833                 goto put_new_uobj;
 834         }
 835         if (new_mr) {
 836                 new_mr->device = new_pd->device;
 837                 new_mr->pd = new_pd;
 838                 new_mr->type = IB_MR_TYPE_USER;
 839                 new_mr->uobject = uobj;
 840                 atomic_inc(&new_pd->usecnt);
 841                 new_uobj->object = new_mr;
 842
 843                 rdma_restrack_new(&new_mr->res, RDMA_RESTRACK_MR);
 844                 rdma_restrack_set_name(&new_mr->res, NULL);
 845                 rdma_restrack_add(&new_mr->res);
 846
 847                 /*
 848                  * The new uobj for the new HW object is put into the same spot
 849                  * in the IDR and the old uobj & HW object is deleted.
 850                  */
 851                 rdma_assign_uobject(uobj, new_uobj, attrs);
 852                 rdma_alloc_commit_uobject(new_uobj, attrs);
 853                 uobj_put_destroy(uobj);
 854                 new_uobj = NULL;
 855                 uobj = NULL;
 856                 mr = new_mr;
 857         } else {
 858                 if (cmd.flags & IB_MR_REREG_PD) {
 859                         atomic_dec(&orig_pd->usecnt);
 860                         mr->pd = new_pd;
 861                         atomic_inc(&new_pd->usecnt);
 862                 }
 863                 if (cmd.flags & IB_MR_REREG_TRANS) {
 864                         mr->iova = cmd.hca_va;
 865                         mr->length = cmd.length;
 866                 }
 867         }
 868
 869         memset(&resp, 0, sizeof(resp));
 870         resp.lkey      = mr->lkey;
 871         resp.rkey      = mr->rkey;
 872
 873         ret = uverbs_response(attrs, &resp, sizeof(resp));
 874
 875 put_new_uobj:
 876         if (new_uobj)
 877                 uobj_alloc_abort(new_uobj, attrs);
 878 put_uobj_pd:
 879         if (cmd.flags & IB_MR_REREG_PD)
 880                 uobj_put_obj_read(new_pd);
 881
 882 put_uobjs:
 883         if (uobj)
 884                 uobj_put_write(uobj);
 885
 886         return ret;
 887 }
 888
 889 static int ib_uverbs_dereg_mr(struct uverbs_attr_bundle *attrs)
 890 {
 891         struct ib_uverbs_dereg_mr cmd;
 892         int ret;
 893
 894         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 895         if (ret)
 896                 return ret;
 897
 898         return uobj_perform_destroy(UVERBS_OBJECT_MR, cmd.mr_handle, attrs);
 899 }
 900
 901 static int ib_uverbs_alloc_mw(struct uverbs_attr_bundle *attrs)
 902 {
 903         struct ib_uverbs_alloc_mw      cmd;
 904         struct ib_uverbs_alloc_mw_resp resp = {};
 905         struct ib_uobject             *uobj;
 906         struct ib_pd                  *pd;
 907         struct ib_mw                  *mw;
 908         int                            ret;
 909         struct ib_device *ib_dev;
 910
 911         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 912         if (ret)
 913                 return ret;
 914
 915         uobj = uobj_alloc(UVERBS_OBJECT_MW, attrs, &ib_dev);
 916         if (IS_ERR(uobj))
 917                 return PTR_ERR(uobj);
 918
 919         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
 920         if (!pd) {
 921                 ret = -EINVAL;
 922                 goto err_free;
 923         }
 924
 925         if (cmd.mw_type != IB_MW_TYPE_1 && cmd.mw_type != IB_MW_TYPE_2) {
 926                 ret = -EINVAL;
 927                 goto err_put;
 928         }
 929
 930         mw = rdma_zalloc_drv_obj(ib_dev, ib_mw);
 931         if (!mw) {
 932                 ret = -ENOMEM;
 933                 goto err_put;
 934         }
 935
 936         mw->device = ib_dev;
 937         mw->pd = pd;
 938         mw->uobject = uobj;
 939         mw->type = cmd.mw_type;
 940
 941         ret = pd->device->ops.alloc_mw(mw, &attrs->driver_udata);
 942         if (ret)
 943                 goto err_alloc;
 944
 945         atomic_inc(&pd->usecnt);
 946
 947         uobj->object = mw;
 948         uobj_put_obj_read(pd);
 949         uobj_finalize_uobj_create(uobj, attrs);
 950
 951         resp.rkey = mw->rkey;
 952         resp.mw_handle = uobj->id;
 953         return uverbs_response(attrs, &resp, sizeof(resp));
 954
 955 err_alloc:
 956         kfree(mw);
 957 err_put:
 958         uobj_put_obj_read(pd);
 959 err_free:
 960         uobj_alloc_abort(uobj, attrs);
 961         return ret;
 962 }
 963
 964 static int ib_uverbs_dealloc_mw(struct uverbs_attr_bundle *attrs)
 965 {
 966         struct ib_uverbs_dealloc_mw cmd;
 967         int ret;
 968
 969         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 970         if (ret)
 971                 return ret;
 972
 973         return uobj_perform_destroy(UVERBS_OBJECT_MW, cmd.mw_handle, attrs);
 974 }
 975
 976 static int ib_uverbs_create_comp_channel(struct uverbs_attr_bundle *attrs)
 977 {
 978         struct ib_uverbs_create_comp_channel       cmd;
 979         struct ib_uverbs_create_comp_channel_resp  resp;
 980         struct ib_uobject                         *uobj;
 981         struct ib_uverbs_completion_event_file    *ev_file;
 982         struct ib_device *ib_dev;
 983         int ret;
 984
 985         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 986         if (ret)
 987                 return ret;
 988
 989         uobj = uobj_alloc(UVERBS_OBJECT_COMP_CHANNEL, attrs, &ib_dev);
 990         if (IS_ERR(uobj))
 991                 return PTR_ERR(uobj);
 992
 993         ev_file = container_of(uobj, struct ib_uverbs_completion_event_file,
 994                                uobj);
 995         ib_uverbs_init_event_queue(&ev_file->ev_queue);
 996         uobj_finalize_uobj_create(uobj, attrs);
 997
 998         resp.fd = uobj->id;
 999         return uverbs_response(attrs, &resp, sizeof(resp));
1000 }
1001
1002 static int create_cq(struct uverbs_attr_bundle *attrs,
1003                      struct ib_uverbs_ex_create_cq *cmd)
1004 {
1005         struct ib_ucq_object           *obj;
1006         struct ib_uverbs_completion_event_file    *ev_file = NULL;
1007         struct ib_cq                   *cq;
1008         int                             ret;
1009         struct ib_uverbs_ex_create_cq_resp resp = {};
1010         struct ib_cq_init_attr attr = {};
1011         struct ib_device *ib_dev;
1012
1013         if (cmd->comp_vector >= attrs->ufile->device->num_comp_vectors)
1014                 return -EINVAL;
1015
1016         obj = (struct ib_ucq_object *)uobj_alloc(UVERBS_OBJECT_CQ, attrs,
1017                                                  &ib_dev);
1018         if (IS_ERR(obj))
1019                 return PTR_ERR(obj);
1020
1021         if (cmd->comp_channel >= 0) {
1022                 ev_file = ib_uverbs_lookup_comp_file(cmd->comp_channel, attrs);
1023                 if (IS_ERR(ev_file)) {
1024                         ret = PTR_ERR(ev_file);
1025                         goto err;
1026                 }
1027         }
1028
1029         obj->uevent.uobject.user_handle = cmd->user_handle;
1030         INIT_LIST_HEAD(&obj->comp_list);
1031         INIT_LIST_HEAD(&obj->uevent.event_list);
1032
1033         attr.cqe = cmd->cqe;
1034         attr.comp_vector = cmd->comp_vector;
1035         attr.flags = cmd->flags;
1036
1037         cq = rdma_zalloc_drv_obj(ib_dev, ib_cq);
1038         if (!cq) {
1039                 ret = -ENOMEM;
1040                 goto err_file;
1041         }
1042         cq->device        = ib_dev;
1043         cq->uobject       = obj;
1044         cq->comp_handler  = ib_uverbs_comp_handler;
1045         cq->event_handler = ib_uverbs_cq_event_handler;
1046         cq->cq_context    = ev_file ? &ev_file->ev_queue : NULL;
1047         atomic_set(&cq->usecnt, 0);
1048
1049         rdma_restrack_new(&cq->res, RDMA_RESTRACK_CQ);
1050         rdma_restrack_set_name(&cq->res, NULL);
1051
1052         ret = ib_dev->ops.create_cq(cq, &attr, attrs);
1053         if (ret)
1054                 goto err_free;
1055         rdma_restrack_add(&cq->res);
1056
1057         obj->uevent.uobject.object = cq;
1058         obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file);
1059         if (obj->uevent.event_file)
1060                 uverbs_uobject_get(&obj->uevent.event_file->uobj);
1061         uobj_finalize_uobj_create(&obj->uevent.uobject, attrs);
1062
1063         resp.base.cq_handle = obj->uevent.uobject.id;
1064         resp.base.cqe = cq->cqe;
1065         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
1066         return uverbs_response(attrs, &resp, sizeof(resp));
1067
1068 err_free:
1069         rdma_restrack_put(&cq->res);
1070         kfree(cq);
1071 err_file:
1072         if (ev_file)
1073                 ib_uverbs_release_ucq(ev_file, obj);
1074 err:
1075         uobj_alloc_abort(&obj->uevent.uobject, attrs);
1076         return ret;
1077 }
1078
1079 static int ib_uverbs_create_cq(struct uverbs_attr_bundle *attrs)
1080 {
1081         struct ib_uverbs_create_cq      cmd;
1082         struct ib_uverbs_ex_create_cq   cmd_ex;
1083         int ret;
1084
1085         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1086         if (ret)
1087                 return ret;
1088
1089         memset(&cmd_ex, 0, sizeof(cmd_ex));
1090         cmd_ex.user_handle = cmd.user_handle;
1091         cmd_ex.cqe = cmd.cqe;
1092         cmd_ex.comp_vector = cmd.comp_vector;
1093         cmd_ex.comp_channel = cmd.comp_channel;
1094
1095         return create_cq(attrs, &cmd_ex);
1096 }
1097
1098 static int ib_uverbs_ex_create_cq(struct uverbs_attr_bundle *attrs)
1099 {
1100         struct ib_uverbs_ex_create_cq  cmd;
1101         int ret;
1102
1103         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1104         if (ret)
1105                 return ret;
1106
1107         if (cmd.comp_mask)
1108                 return -EINVAL;
1109
1110         if (cmd.reserved)
1111                 return -EINVAL;
1112
1113         return create_cq(attrs, &cmd);
1114 }
1115
1116 static int ib_uverbs_resize_cq(struct uverbs_attr_bundle *attrs)
1117 {
1118         struct ib_uverbs_resize_cq      cmd;
1119         struct ib_uverbs_resize_cq_resp resp = {};
1120         struct ib_cq                    *cq;
1121         int ret;
1122
1123         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1124         if (ret)
1125                 return ret;
1126
1127         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
1128         if (!cq)
1129                 return -EINVAL;
1130
1131         ret = cq->device->ops.resize_cq(cq, cmd.cqe, &attrs->driver_udata);
1132         if (ret)
1133                 goto out;
1134
1135         resp.cqe = cq->cqe;
1136
1137         ret = uverbs_response(attrs, &resp, sizeof(resp));
1138 out:
1139         rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
1140                                 UVERBS_LOOKUP_READ);
1141
1142         return ret;
1143 }
1144
1145 static int copy_wc_to_user(struct ib_device *ib_dev, void __user *dest,
1146                            struct ib_wc *wc)
1147 {
1148         struct ib_uverbs_wc tmp;
1149
1150         tmp.wr_id               = wc->wr_id;
1151         tmp.status              = wc->status;
1152         tmp.opcode              = wc->opcode;
1153         tmp.vendor_err          = wc->vendor_err;
1154         tmp.byte_len            = wc->byte_len;
1155         tmp.ex.imm_data         = wc->ex.imm_data;
1156         tmp.qp_num              = wc->qp->qp_num;
1157         tmp.src_qp              = wc->src_qp;
1158         tmp.wc_flags            = wc->wc_flags;
1159         tmp.pkey_index          = wc->pkey_index;
1160         if (rdma_cap_opa_ah(ib_dev, wc->port_num))
1161                 tmp.slid        = OPA_TO_IB_UCAST_LID(wc->slid);
1162         else
1163                 tmp.slid        = ib_lid_cpu16(wc->slid);
1164         tmp.sl                  = wc->sl;
1165         tmp.dlid_path_bits      = wc->dlid_path_bits;
1166         tmp.port_num            = wc->port_num;
1167         tmp.reserved            = 0;
1168
1169         if (copy_to_user(dest, &tmp, sizeof tmp))
1170                 return -EFAULT;
1171
1172         return 0;
1173 }
1174
1175 static int ib_uverbs_poll_cq(struct uverbs_attr_bundle *attrs)
1176 {
1177         struct ib_uverbs_poll_cq       cmd;
1178         struct ib_uverbs_poll_cq_resp  resp;
1179         u8 __user                     *header_ptr;
1180         u8 __user                     *data_ptr;
1181         struct ib_cq                  *cq;
1182         struct ib_wc                   wc;
1183         int                            ret;
1184
1185         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1186         if (ret)
1187                 return ret;
1188
1189         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
1190         if (!cq)
1191                 return -EINVAL;
1192
1193         /* we copy a struct ib_uverbs_poll_cq_resp to user space */
1194         header_ptr = attrs->ucore.outbuf;
1195         data_ptr = header_ptr + sizeof resp;
1196
1197         memset(&resp, 0, sizeof resp);
1198         while (resp.count < cmd.ne) {
1199                 ret = ib_poll_cq(cq, 1, &wc);
1200                 if (ret < 0)
1201                         goto out_put;
1202                 if (!ret)
1203                         break;
1204
1205                 ret = copy_wc_to_user(cq->device, data_ptr, &wc);
1206                 if (ret)
1207                         goto out_put;
1208
1209                 data_ptr += sizeof(struct ib_uverbs_wc);
1210                 ++resp.count;
1211         }
1212
1213         if (copy_to_user(header_ptr, &resp, sizeof resp)) {
1214                 ret = -EFAULT;
1215                 goto out_put;
1216         }
1217         ret = 0;
1218
1219         if (uverbs_attr_is_valid(attrs, UVERBS_ATTR_CORE_OUT))
1220                 ret = uverbs_output_written(attrs, UVERBS_ATTR_CORE_OUT);
1221
1222 out_put:
1223         rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
1224                                 UVERBS_LOOKUP_READ);
1225         return ret;
1226 }
1227
1228 static int ib_uverbs_req_notify_cq(struct uverbs_attr_bundle *attrs)
1229 {
1230         struct ib_uverbs_req_notify_cq cmd;
1231         struct ib_cq                  *cq;
1232         int ret;
1233
1234         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1235         if (ret)
1236                 return ret;
1237
1238         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
1239         if (!cq)
1240                 return -EINVAL;
1241
1242         ib_req_notify_cq(cq, cmd.solicited_only ?
1243                          IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
1244
1245         rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
1246                                 UVERBS_LOOKUP_READ);
1247         return 0;
1248 }
1249
1250 static int ib_uverbs_destroy_cq(struct uverbs_attr_bundle *attrs)
1251 {
1252         struct ib_uverbs_destroy_cq      cmd;
1253         struct ib_uverbs_destroy_cq_resp resp;
1254         struct ib_uobject               *uobj;
1255         struct ib_ucq_object            *obj;
1256         int ret;
1257
1258         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1259         if (ret)
1260                 return ret;
1261
1262         uobj = uobj_get_destroy(UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
1263         if (IS_ERR(uobj))
1264                 return PTR_ERR(uobj);
1265
1266         obj = container_of(uobj, struct ib_ucq_object, uevent.uobject);
1267         memset(&resp, 0, sizeof(resp));
1268         resp.comp_events_reported  = obj->comp_events_reported;
1269         resp.async_events_reported = obj->uevent.events_reported;
1270
1271         uobj_put_destroy(uobj);
1272
1273         return uverbs_response(attrs, &resp, sizeof(resp));
1274 }
1275
1276 static int create_qp(struct uverbs_attr_bundle *attrs,
1277                      struct ib_uverbs_ex_create_qp *cmd)
1278 {
1279         struct ib_uqp_object            *obj;
1280         struct ib_device                *device;
1281         struct ib_pd                    *pd = NULL;
1282         struct ib_xrcd                  *xrcd = NULL;
1283         struct ib_uobject               *xrcd_uobj = ERR_PTR(-ENOENT);
1284         struct ib_cq                    *scq = NULL, *rcq = NULL;
1285         struct ib_srq                   *srq = NULL;
1286         struct ib_qp                    *qp;
1287         struct ib_qp_init_attr          attr = {};
1288         struct ib_uverbs_ex_create_qp_resp resp = {};
1289         int                             ret;
1290         struct ib_rwq_ind_table *ind_tbl = NULL;
1291         bool has_sq = true;
1292         struct ib_device *ib_dev;
1293
1294         switch (cmd->qp_type) {
1295         case IB_QPT_RAW_PACKET:
1296                 if (!capable(CAP_NET_RAW))
1297                         return -EPERM;
1298                 break;
1299         case IB_QPT_RC:
1300         case IB_QPT_UC:
1301         case IB_QPT_UD:
1302         case IB_QPT_XRC_INI:
1303         case IB_QPT_XRC_TGT:
1304         case IB_QPT_DRIVER:
1305                 break;
1306         default:
1307                 return -EINVAL;
1308         }
1309
1310         obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs,
1311                                                  &ib_dev);
1312         if (IS_ERR(obj))
1313                 return PTR_ERR(obj);
1314         obj->uxrcd = NULL;
1315         obj->uevent.uobject.user_handle = cmd->user_handle;
1316         mutex_init(&obj->mcast_lock);
1317
1318         if (cmd->comp_mask & IB_UVERBS_CREATE_QP_MASK_IND_TABLE) {
1319                 ind_tbl = uobj_get_obj_read(rwq_ind_table,
1320                                             UVERBS_OBJECT_RWQ_IND_TBL,
1321                                             cmd->rwq_ind_tbl_handle, attrs);
1322                 if (!ind_tbl) {
1323                         ret = -EINVAL;
1324                         goto err_put;
1325                 }
1326
1327                 attr.rwq_ind_tbl = ind_tbl;
1328         }
1329
1330         if (ind_tbl && (cmd->max_recv_wr || cmd->max_recv_sge || cmd->is_srq)) {
1331                 ret = -EINVAL;
1332                 goto err_put;
1333         }
1334
1335         if (ind_tbl && !cmd->max_send_wr)
1336                 has_sq = false;
1337
1338         if (cmd->qp_type == IB_QPT_XRC_TGT) {
1339                 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->pd_handle,
1340                                           attrs);
1341
1342                 if (IS_ERR(xrcd_uobj)) {
1343                         ret = -EINVAL;
1344                         goto err_put;
1345                 }
1346
1347                 xrcd = (struct ib_xrcd *)xrcd_uobj->object;
1348                 if (!xrcd) {
1349                         ret = -EINVAL;
1350                         goto err_put;
1351                 }
1352                 device = xrcd->device;
1353         } else {
1354                 if (cmd->qp_type == IB_QPT_XRC_INI) {
1355                         cmd->max_recv_wr = 0;
1356                         cmd->max_recv_sge = 0;
1357                 } else {
1358                         if (cmd->is_srq) {
1359                                 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ,
1360                                                         cmd->srq_handle, attrs);
1361                                 if (!srq || srq->srq_type == IB_SRQT_XRC) {
1362                                         ret = -EINVAL;
1363                                         goto err_put;
1364                                 }
1365                         }
1366
1367                         if (!ind_tbl) {
1368                                 if (cmd->recv_cq_handle != cmd->send_cq_handle) {
1369                                         rcq = uobj_get_obj_read(
1370                                                 cq, UVERBS_OBJECT_CQ,
1371                                                 cmd->recv_cq_handle, attrs);
1372                                         if (!rcq) {
1373                                                 ret = -EINVAL;
1374                                                 goto err_put;
1375                                         }
1376                                 }
1377                         }
1378                 }
1379
1380                 if (has_sq)
1381                         scq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ,
1382                                                 cmd->send_cq_handle, attrs);
1383                 if (!ind_tbl && cmd->qp_type != IB_QPT_XRC_INI)
1384                         rcq = rcq ?: scq;
1385                 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle,
1386                                        attrs);
1387                 if (!pd || (!scq && has_sq)) {
1388                         ret = -EINVAL;
1389                         goto err_put;
1390                 }
1391
1392                 device = pd->device;
1393         }
1394
1395         attr.event_handler = ib_uverbs_qp_event_handler;
1396         attr.send_cq       = scq;
1397         attr.recv_cq       = rcq;
1398         attr.srq           = srq;
1399         attr.xrcd          = xrcd;
1400         attr.sq_sig_type   = cmd->sq_sig_all ? IB_SIGNAL_ALL_WR :
1401                                               IB_SIGNAL_REQ_WR;
1402         attr.qp_type       = cmd->qp_type;
1403
1404         attr.cap.max_send_wr     = cmd->max_send_wr;
1405         attr.cap.max_recv_wr     = cmd->max_recv_wr;
1406         attr.cap.max_send_sge    = cmd->max_send_sge;
1407         attr.cap.max_recv_sge    = cmd->max_recv_sge;
1408         attr.cap.max_inline_data = cmd->max_inline_data;
1409
1410         INIT_LIST_HEAD(&obj->uevent.event_list);
1411         INIT_LIST_HEAD(&obj->mcast_list);
1412
1413         attr.create_flags = cmd->create_flags;
1414         if (attr.create_flags & ~(IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK |
1415                                 IB_QP_CREATE_CROSS_CHANNEL |
1416                                 IB_QP_CREATE_MANAGED_SEND |
1417                                 IB_QP_CREATE_MANAGED_RECV |
1418                                 IB_QP_CREATE_SCATTER_FCS |
1419                                 IB_QP_CREATE_CVLAN_STRIPPING |
1420                                 IB_QP_CREATE_SOURCE_QPN |
1421                                 IB_QP_CREATE_PCI_WRITE_END_PADDING)) {
1422                 ret = -EINVAL;
1423                 goto err_put;
1424         }
1425
1426         if (attr.create_flags & IB_QP_CREATE_SOURCE_QPN) {
1427                 if (!capable(CAP_NET_RAW)) {
1428                         ret = -EPERM;
1429                         goto err_put;
1430                 }
1431
1432                 attr.source_qpn = cmd->source_qpn;
1433         }
1434
1435         qp = ib_create_qp_user(device, pd, &attr, &attrs->driver_udata, obj,
1436                                KBUILD_MODNAME);
1437         if (IS_ERR(qp)) {
1438                 ret = PTR_ERR(qp);
1439                 goto err_put;
1440         }
1441         ib_qp_usecnt_inc(qp);
1442
1443         obj->uevent.uobject.object = qp;
1444         obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file);
1445         if (obj->uevent.event_file)
1446                 uverbs_uobject_get(&obj->uevent.event_file->uobj);
1447
1448         if (xrcd) {
1449                 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object,
1450                                           uobject);
1451                 atomic_inc(&obj->uxrcd->refcnt);
1452                 uobj_put_read(xrcd_uobj);
1453         }
1454
1455         if (pd)
1456                 uobj_put_obj_read(pd);
1457         if (scq)
1458                 rdma_lookup_put_uobject(&scq->uobject->uevent.uobject,
1459                                         UVERBS_LOOKUP_READ);
1460         if (rcq && rcq != scq)
1461                 rdma_lookup_put_uobject(&rcq->uobject->uevent.uobject,
1462                                         UVERBS_LOOKUP_READ);
1463         if (srq)
1464                 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
1465                                         UVERBS_LOOKUP_READ);
1466         if (ind_tbl)
1467                 uobj_put_obj_read(ind_tbl);
1468         uobj_finalize_uobj_create(&obj->uevent.uobject, attrs);
1469
1470         resp.base.qpn             = qp->qp_num;
1471         resp.base.qp_handle       = obj->uevent.uobject.id;
1472         resp.base.max_recv_sge    = attr.cap.max_recv_sge;
1473         resp.base.max_send_sge    = attr.cap.max_send_sge;
1474         resp.base.max_recv_wr     = attr.cap.max_recv_wr;
1475         resp.base.max_send_wr     = attr.cap.max_send_wr;
1476         resp.base.max_inline_data = attr.cap.max_inline_data;
1477         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
1478         return uverbs_response(attrs, &resp, sizeof(resp));
1479
1480 err_put:
1481         if (!IS_ERR(xrcd_uobj))
1482                 uobj_put_read(xrcd_uobj);
1483         if (pd)
1484                 uobj_put_obj_read(pd);
1485         if (scq)
1486                 rdma_lookup_put_uobject(&scq->uobject->uevent.uobject,
1487                                         UVERBS_LOOKUP_READ);
1488         if (rcq && rcq != scq)
1489                 rdma_lookup_put_uobject(&rcq->uobject->uevent.uobject,
1490                                         UVERBS_LOOKUP_READ);
1491         if (srq)
1492                 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
1493                                         UVERBS_LOOKUP_READ);
1494         if (ind_tbl)
1495                 uobj_put_obj_read(ind_tbl);
1496
1497         uobj_alloc_abort(&obj->uevent.uobject, attrs);
1498         return ret;
1499 }
1500
1501 static int ib_uverbs_create_qp(struct uverbs_attr_bundle *attrs)
1502 {
1503         struct ib_uverbs_create_qp      cmd;
1504         struct ib_uverbs_ex_create_qp   cmd_ex;
1505         int ret;
1506
1507         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1508         if (ret)
1509                 return ret;
1510
1511         memset(&cmd_ex, 0, sizeof(cmd_ex));
1512         cmd_ex.user_handle = cmd.user_handle;
1513         cmd_ex.pd_handle = cmd.pd_handle;
1514         cmd_ex.send_cq_handle = cmd.send_cq_handle;
1515         cmd_ex.recv_cq_handle = cmd.recv_cq_handle;
1516         cmd_ex.srq_handle = cmd.srq_handle;
1517         cmd_ex.max_send_wr = cmd.max_send_wr;
1518         cmd_ex.max_recv_wr = cmd.max_recv_wr;
1519         cmd_ex.max_send_sge = cmd.max_send_sge;
1520         cmd_ex.max_recv_sge = cmd.max_recv_sge;
1521         cmd_ex.max_inline_data = cmd.max_inline_data;
1522         cmd_ex.sq_sig_all = cmd.sq_sig_all;
1523         cmd_ex.qp_type = cmd.qp_type;
1524         cmd_ex.is_srq = cmd.is_srq;
1525
1526         return create_qp(attrs, &cmd_ex);
1527 }
1528
1529 static int ib_uverbs_ex_create_qp(struct uverbs_attr_bundle *attrs)
1530 {
1531         struct ib_uverbs_ex_create_qp cmd;
1532         int ret;
1533
1534         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1535         if (ret)
1536                 return ret;
1537
1538         if (cmd.comp_mask & ~IB_UVERBS_CREATE_QP_SUP_COMP_MASK)
1539                 return -EINVAL;
1540
1541         if (cmd.reserved)
1542                 return -EINVAL;
1543
1544         return create_qp(attrs, &cmd);
1545 }
1546
1547 static int ib_uverbs_open_qp(struct uverbs_attr_bundle *attrs)
1548 {
1549         struct ib_uverbs_create_qp_resp resp = {};
1550         struct ib_uverbs_open_qp        cmd;
1551         struct ib_uqp_object           *obj;
1552         struct ib_xrcd                 *xrcd;
1553         struct ib_qp                   *qp;
1554         struct ib_qp_open_attr          attr = {};
1555         int ret;
1556         struct ib_uobject *xrcd_uobj;
1557         struct ib_device *ib_dev;
1558
1559         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1560         if (ret)
1561                 return ret;
1562
1563         obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs,
1564                                                  &ib_dev);
1565         if (IS_ERR(obj))
1566                 return PTR_ERR(obj);
1567
1568         xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd.pd_handle, attrs);
1569         if (IS_ERR(xrcd_uobj)) {
1570                 ret = -EINVAL;
1571                 goto err_put;
1572         }
1573
1574         xrcd = (struct ib_xrcd *)xrcd_uobj->object;
1575         if (!xrcd) {
1576                 ret = -EINVAL;
1577                 goto err_xrcd;
1578         }
1579
1580         attr.event_handler = ib_uverbs_qp_event_handler;
1581         attr.qp_num        = cmd.qpn;
1582         attr.qp_type       = cmd.qp_type;
1583
1584         INIT_LIST_HEAD(&obj->uevent.event_list);
1585         INIT_LIST_HEAD(&obj->mcast_list);
1586
1587         qp = ib_open_qp(xrcd, &attr);
1588         if (IS_ERR(qp)) {
1589                 ret = PTR_ERR(qp);
1590                 goto err_xrcd;
1591         }
1592
1593         obj->uevent.uobject.object = qp;
1594         obj->uevent.uobject.user_handle = cmd.user_handle;
1595
1596         obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
1597         atomic_inc(&obj->uxrcd->refcnt);
1598         qp->uobject = obj;
1599         uobj_put_read(xrcd_uobj);
1600         uobj_finalize_uobj_create(&obj->uevent.uobject, attrs);
1601
1602         resp.qpn = qp->qp_num;
1603         resp.qp_handle = obj->uevent.uobject.id;
1604         return uverbs_response(attrs, &resp, sizeof(resp));
1605
1606 err_xrcd:
1607         uobj_put_read(xrcd_uobj);
1608 err_put:
1609         uobj_alloc_abort(&obj->uevent.uobject, attrs);
1610         return ret;
1611 }
1612
1613 static void copy_ah_attr_to_uverbs(struct ib_uverbs_qp_dest *uverb_attr,
1614                                    struct rdma_ah_attr *rdma_attr)
1615 {
1616         const struct ib_global_route   *grh;
1617
1618         uverb_attr->dlid              = rdma_ah_get_dlid(rdma_attr);
1619         uverb_attr->sl                = rdma_ah_get_sl(rdma_attr);
1620         uverb_attr->src_path_bits     = rdma_ah_get_path_bits(rdma_attr);
1621         uverb_attr->static_rate       = rdma_ah_get_static_rate(rdma_attr);
1622         uverb_attr->is_global         = !!(rdma_ah_get_ah_flags(rdma_attr) &
1623                                          IB_AH_GRH);
1624         if (uverb_attr->is_global) {
1625                 grh = rdma_ah_read_grh(rdma_attr);
1626                 memcpy(uverb_attr->dgid, grh->dgid.raw, 16);
1627                 uverb_attr->flow_label        = grh->flow_label;
1628                 uverb_attr->sgid_index        = grh->sgid_index;
1629                 uverb_attr->hop_limit         = grh->hop_limit;
1630                 uverb_attr->traffic_class     = grh->traffic_class;
1631         }
1632         uverb_attr->port_num          = rdma_ah_get_port_num(rdma_attr);
1633 }
1634
1635 static int ib_uverbs_query_qp(struct uverbs_attr_bundle *attrs)
1636 {
1637         struct ib_uverbs_query_qp      cmd;
1638         struct ib_uverbs_query_qp_resp resp;
1639         struct ib_qp                   *qp;
1640         struct ib_qp_attr              *attr;
1641         struct ib_qp_init_attr         *init_attr;
1642         int                            ret;
1643
1644         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1645         if (ret)
1646                 return ret;
1647
1648         attr      = kmalloc(sizeof *attr, GFP_KERNEL);
1649         init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1650         if (!attr || !init_attr) {
1651                 ret = -ENOMEM;
1652                 goto out;
1653         }
1654
1655         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
1656         if (!qp) {
1657                 ret = -EINVAL;
1658                 goto out;
1659         }
1660
1661         ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1662
1663         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
1664                                 UVERBS_LOOKUP_READ);
1665
1666         if (ret)
1667                 goto out;
1668
1669         memset(&resp, 0, sizeof resp);
1670
1671         resp.qp_state               = attr->qp_state;
1672         resp.cur_qp_state           = attr->cur_qp_state;
1673         resp.path_mtu               = attr->path_mtu;
1674         resp.path_mig_state         = attr->path_mig_state;
1675         resp.qkey                   = attr->qkey;
1676         resp.rq_psn                 = attr->rq_psn;
1677         resp.sq_psn                 = attr->sq_psn;
1678         resp.dest_qp_num            = attr->dest_qp_num;
1679         resp.qp_access_flags        = attr->qp_access_flags;
1680         resp.pkey_index             = attr->pkey_index;
1681         resp.alt_pkey_index         = attr->alt_pkey_index;
1682         resp.sq_draining            = attr->sq_draining;
1683         resp.max_rd_atomic          = attr->max_rd_atomic;
1684         resp.max_dest_rd_atomic     = attr->max_dest_rd_atomic;
1685         resp.min_rnr_timer          = attr->min_rnr_timer;
1686         resp.port_num               = attr->port_num;
1687         resp.timeout                = attr->timeout;
1688         resp.retry_cnt              = attr->retry_cnt;
1689         resp.rnr_retry              = attr->rnr_retry;
1690         resp.alt_port_num           = attr->alt_port_num;
1691         resp.alt_timeout            = attr->alt_timeout;
1692
1693         copy_ah_attr_to_uverbs(&resp.dest, &attr->ah_attr);
1694         copy_ah_attr_to_uverbs(&resp.alt_dest, &attr->alt_ah_attr);
1695
1696         resp.max_send_wr            = init_attr->cap.max_send_wr;
1697         resp.max_recv_wr            = init_attr->cap.max_recv_wr;
1698         resp.max_send_sge           = init_attr->cap.max_send_sge;
1699         resp.max_recv_sge           = init_attr->cap.max_recv_sge;
1700         resp.max_inline_data        = init_attr->cap.max_inline_data;
1701         resp.sq_sig_all             = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1702
1703         ret = uverbs_response(attrs, &resp, sizeof(resp));
1704
1705 out:
1706         kfree(attr);
1707         kfree(init_attr);
1708
1709         return ret;
1710 }
1711
1712 /* Remove ignored fields set in the attribute mask */
1713 static int modify_qp_mask(enum ib_qp_type qp_type, int mask)
1714 {
1715         switch (qp_type) {
1716         case IB_QPT_XRC_INI:
1717                 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER);
1718         case IB_QPT_XRC_TGT:
1719                 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT |
1720                                 IB_QP_RNR_RETRY);
1721         default:
1722                 return mask;
1723         }
1724 }
1725
1726 static void copy_ah_attr_from_uverbs(struct ib_device *dev,
1727                                      struct rdma_ah_attr *rdma_attr,
1728                                      struct ib_uverbs_qp_dest *uverb_attr)
1729 {
1730         rdma_attr->type = rdma_ah_find_type(dev, uverb_attr->port_num);
1731         if (uverb_attr->is_global) {
1732                 rdma_ah_set_grh(rdma_attr, NULL,
1733                                 uverb_attr->flow_label,
1734                                 uverb_attr->sgid_index,
1735                                 uverb_attr->hop_limit,
1736                                 uverb_attr->traffic_class);
1737                 rdma_ah_set_dgid_raw(rdma_attr, uverb_attr->dgid);
1738         } else {
1739                 rdma_ah_set_ah_flags(rdma_attr, 0);
1740         }
1741         rdma_ah_set_dlid(rdma_attr, uverb_attr->dlid);
1742         rdma_ah_set_sl(rdma_attr, uverb_attr->sl);
1743         rdma_ah_set_path_bits(rdma_attr, uverb_attr->src_path_bits);
1744         rdma_ah_set_static_rate(rdma_attr, uverb_attr->static_rate);
1745         rdma_ah_set_port_num(rdma_attr, uverb_attr->port_num);
1746         rdma_ah_set_make_grd(rdma_attr, false);
1747 }
1748
1749 static int modify_qp(struct uverbs_attr_bundle *attrs,
1750                      struct ib_uverbs_ex_modify_qp *cmd)
1751 {
1752         struct ib_qp_attr *attr;
1753         struct ib_qp *qp;
1754         int ret;
1755
1756         attr = kzalloc(sizeof(*attr), GFP_KERNEL);
1757         if (!attr)
1758                 return -ENOMEM;
1759
1760         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd->base.qp_handle,
1761                                attrs);
1762         if (!qp) {
1763                 ret = -EINVAL;
1764                 goto out;
1765         }
1766
1767         if ((cmd->base.attr_mask & IB_QP_PORT) &&
1768             !rdma_is_port_valid(qp->device, cmd->base.port_num)) {
1769                 ret = -EINVAL;
1770                 goto release_qp;
1771         }
1772
1773         if ((cmd->base.attr_mask & IB_QP_AV)) {
1774                 if (!rdma_is_port_valid(qp->device, cmd->base.dest.port_num)) {
1775                         ret = -EINVAL;
1776                         goto release_qp;
1777                 }
1778
1779                 if (cmd->base.attr_mask & IB_QP_STATE &&
1780                     cmd->base.qp_state == IB_QPS_RTR) {
1781                 /* We are in INIT->RTR TRANSITION (if we are not,
1782                  * this transition will be rejected in subsequent checks).
1783                  * In the INIT->RTR transition, we cannot have IB_QP_PORT set,
1784                  * but the IB_QP_STATE flag is required.
1785                  *
1786                  * Since kernel 3.14 (commit dbf727de7440), the uverbs driver,
1787                  * when IB_QP_AV is set, has required inclusion of a valid
1788                  * port number in the primary AV. (AVs are created and handled
1789                  * differently for infiniband and ethernet (RoCE) ports).
1790                  *
1791                  * Check the port number included in the primary AV against
1792                  * the port number in the qp struct, which was set (and saved)
1793                  * in the RST->INIT transition.
1794                  */
1795                         if (cmd->base.dest.port_num != qp->real_qp->port) {
1796                                 ret = -EINVAL;
1797                                 goto release_qp;
1798                         }
1799                 } else {
1800                 /* We are in SQD->SQD. (If we are not, this transition will
1801                  * be rejected later in the verbs layer checks).
1802                  * Check for both IB_QP_PORT and IB_QP_AV, these can be set
1803                  * together in the SQD->SQD transition.
1804                  *
1805                  * If only IP_QP_AV was set, add in IB_QP_PORT as well (the
1806                  * verbs layer driver does not track primary port changes
1807                  * resulting from path migration. Thus, in SQD, if the primary
1808                  * AV is modified, the primary port should also be modified).
1809                  *
1810                  * Note that in this transition, the IB_QP_STATE flag
1811                  * is not allowed.
1812                  */
1813                         if (((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT))
1814                              == (IB_QP_AV | IB_QP_PORT)) &&
1815                             cmd->base.port_num != cmd->base.dest.port_num) {
1816                                 ret = -EINVAL;
1817                                 goto release_qp;
1818                         }
1819                         if ((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT))
1820                             == IB_QP_AV) {
1821                                 cmd->base.attr_mask |= IB_QP_PORT;
1822                                 cmd->base.port_num = cmd->base.dest.port_num;
1823                         }
1824                 }
1825         }
1826
1827         if ((cmd->base.attr_mask & IB_QP_ALT_PATH) &&
1828             (!rdma_is_port_valid(qp->device, cmd->base.alt_port_num) ||
1829             !rdma_is_port_valid(qp->device, cmd->base.alt_dest.port_num) ||
1830             cmd->base.alt_port_num != cmd->base.alt_dest.port_num)) {
1831                 ret = -EINVAL;
1832                 goto release_qp;
1833         }
1834
1835         if ((cmd->base.attr_mask & IB_QP_CUR_STATE &&
1836             cmd->base.cur_qp_state > IB_QPS_ERR) ||
1837             (cmd->base.attr_mask & IB_QP_STATE &&
1838             cmd->base.qp_state > IB_QPS_ERR)) {
1839                 ret = -EINVAL;
1840                 goto release_qp;
1841         }
1842
1843         if (cmd->base.attr_mask & IB_QP_STATE)
1844                 attr->qp_state = cmd->base.qp_state;
1845         if (cmd->base.attr_mask & IB_QP_CUR_STATE)
1846                 attr->cur_qp_state = cmd->base.cur_qp_state;
1847         if (cmd->base.attr_mask & IB_QP_PATH_MTU)
1848                 attr->path_mtu = cmd->base.path_mtu;
1849         if (cmd->base.attr_mask & IB_QP_PATH_MIG_STATE)
1850                 attr->path_mig_state = cmd->base.path_mig_state;
1851         if (cmd->base.attr_mask & IB_QP_QKEY) {
1852                 if (cmd->base.qkey & IB_QP_SET_QKEY &&
1853                     !rdma_nl_get_privileged_qkey()) {
1854                         ret = -EPERM;
1855                         goto release_qp;
1856                 }
1857                 attr->qkey = cmd->base.qkey;
1858         }
1859         if (cmd->base.attr_mask & IB_QP_RQ_PSN)
1860                 attr->rq_psn = cmd->base.rq_psn;
1861         if (cmd->base.attr_mask & IB_QP_SQ_PSN)
1862                 attr->sq_psn = cmd->base.sq_psn;
1863         if (cmd->base.attr_mask & IB_QP_DEST_QPN)
1864                 attr->dest_qp_num = cmd->base.dest_qp_num;
1865         if (cmd->base.attr_mask & IB_QP_ACCESS_FLAGS)
1866                 attr->qp_access_flags = cmd->base.qp_access_flags;
1867         if (cmd->base.attr_mask & IB_QP_PKEY_INDEX)
1868                 attr->pkey_index = cmd->base.pkey_index;
1869         if (cmd->base.attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY)
1870                 attr->en_sqd_async_notify = cmd->base.en_sqd_async_notify;
1871         if (cmd->base.attr_mask & IB_QP_MAX_QP_RD_ATOMIC)
1872                 attr->max_rd_atomic = cmd->base.max_rd_atomic;
1873         if (cmd->base.attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
1874                 attr->max_dest_rd_atomic = cmd->base.max_dest_rd_atomic;
1875         if (cmd->base.attr_mask & IB_QP_MIN_RNR_TIMER)
1876                 attr->min_rnr_timer = cmd->base.min_rnr_timer;
1877         if (cmd->base.attr_mask & IB_QP_PORT)
1878                 attr->port_num = cmd->base.port_num;
1879         if (cmd->base.attr_mask & IB_QP_TIMEOUT)
1880                 attr->timeout = cmd->base.timeout;
1881         if (cmd->base.attr_mask & IB_QP_RETRY_CNT)
1882                 attr->retry_cnt = cmd->base.retry_cnt;
1883         if (cmd->base.attr_mask & IB_QP_RNR_RETRY)
1884                 attr->rnr_retry = cmd->base.rnr_retry;
1885         if (cmd->base.attr_mask & IB_QP_ALT_PATH) {
1886                 attr->alt_port_num = cmd->base.alt_port_num;
1887                 attr->alt_timeout = cmd->base.alt_timeout;
1888                 attr->alt_pkey_index = cmd->base.alt_pkey_index;
1889         }
1890         if (cmd->base.attr_mask & IB_QP_RATE_LIMIT)
1891                 attr->rate_limit = cmd->rate_limit;
1892
1893         if (cmd->base.attr_mask & IB_QP_AV)
1894                 copy_ah_attr_from_uverbs(qp->device, &attr->ah_attr,
1895                                          &cmd->base.dest);
1896
1897         if (cmd->base.attr_mask & IB_QP_ALT_PATH)
1898                 copy_ah_attr_from_uverbs(qp->device, &attr->alt_ah_attr,
1899                                          &cmd->base.alt_dest);
1900
1901         ret = ib_modify_qp_with_udata(qp, attr,
1902                                       modify_qp_mask(qp->qp_type,
1903                                                      cmd->base.attr_mask),
1904                                       &attrs->driver_udata);
1905
1906 release_qp:
1907         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
1908                                 UVERBS_LOOKUP_READ);
1909 out:
1910         kfree(attr);
1911
1912         return ret;
1913 }
1914
1915 static int ib_uverbs_modify_qp(struct uverbs_attr_bundle *attrs)
1916 {
1917         struct ib_uverbs_ex_modify_qp cmd;
1918         int ret;
1919
1920         ret = uverbs_request(attrs, &cmd.base, sizeof(cmd.base));
1921         if (ret)
1922                 return ret;
1923
1924         if (cmd.base.attr_mask & ~IB_QP_ATTR_STANDARD_BITS)
1925                 return -EOPNOTSUPP;
1926
1927         return modify_qp(attrs, &cmd);
1928 }
1929
1930 static int ib_uverbs_ex_modify_qp(struct uverbs_attr_bundle *attrs)
1931 {
1932         struct ib_uverbs_ex_modify_qp cmd;
1933         struct ib_uverbs_ex_modify_qp_resp resp = {
1934                 .response_length = uverbs_response_length(attrs, sizeof(resp))
1935         };
1936         int ret;
1937
1938         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1939         if (ret)
1940                 return ret;
1941
1942         /*
1943          * Last bit is reserved for extending the attr_mask by
1944          * using another field.
1945          */
1946         if (cmd.base.attr_mask & ~(IB_QP_ATTR_STANDARD_BITS | IB_QP_RATE_LIMIT))
1947                 return -EOPNOTSUPP;
1948
1949         ret = modify_qp(attrs, &cmd);
1950         if (ret)
1951                 return ret;
1952
1953         return uverbs_response(attrs, &resp, sizeof(resp));
1954 }
1955
1956 static int ib_uverbs_destroy_qp(struct uverbs_attr_bundle *attrs)
1957 {
1958         struct ib_uverbs_destroy_qp      cmd;
1959         struct ib_uverbs_destroy_qp_resp resp;
1960         struct ib_uobject               *uobj;
1961         struct ib_uqp_object            *obj;
1962         int ret;
1963
1964         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1965         if (ret)
1966                 return ret;
1967
1968         uobj = uobj_get_destroy(UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
1969         if (IS_ERR(uobj))
1970                 return PTR_ERR(uobj);
1971
1972         obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
1973         memset(&resp, 0, sizeof(resp));
1974         resp.events_reported = obj->uevent.events_reported;
1975
1976         uobj_put_destroy(uobj);
1977
1978         return uverbs_response(attrs, &resp, sizeof(resp));
1979 }
1980
1981 static void *alloc_wr(size_t wr_size, __u32 num_sge)
1982 {
1983         if (num_sge >= (U32_MAX - ALIGN(wr_size, sizeof(struct ib_sge))) /
1984                                sizeof(struct ib_sge))
1985                 return NULL;
1986
1987         return kmalloc(ALIGN(wr_size, sizeof(struct ib_sge)) +
1988                                num_sge * sizeof(struct ib_sge),
1989                        GFP_KERNEL);
1990 }
1991
1992 static int ib_uverbs_post_send(struct uverbs_attr_bundle *attrs)
1993 {
1994         struct ib_uverbs_post_send      cmd;
1995         struct ib_uverbs_post_send_resp resp;
1996         struct ib_uverbs_send_wr       *user_wr;
1997         struct ib_send_wr              *wr = NULL, *last, *next;
1998         const struct ib_send_wr        *bad_wr;
1999         struct ib_qp                   *qp;
2000         int                             i, sg_ind;
2001         int                             is_ud;
2002         int ret, ret2;
2003         size_t                          next_size;
2004         const struct ib_sge __user *sgls;
2005         const void __user *wqes;
2006         struct uverbs_req_iter iter;
2007
2008         ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
2009         if (ret)
2010                 return ret;
2011         wqes = uverbs_request_next_ptr(&iter, size_mul(cmd.wqe_size,
2012                                                        cmd.wr_count));
2013         if (IS_ERR(wqes))
2014                 return PTR_ERR(wqes);
2015         sgls = uverbs_request_next_ptr(&iter,
2016                                        size_mul(cmd.sge_count,
2017                                                 sizeof(struct ib_uverbs_sge)));
2018         if (IS_ERR(sgls))
2019                 return PTR_ERR(sgls);
2020         ret = uverbs_request_finish(&iter);
2021         if (ret)
2022                 return ret;
2023
2024         user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
2025         if (!user_wr)
2026                 return -ENOMEM;
2027
2028         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2029         if (!qp) {
2030                 ret = -EINVAL;
2031                 goto out;
2032         }
2033
2034         is_ud = qp->qp_type == IB_QPT_UD;
2035         sg_ind = 0;
2036         last = NULL;
2037         for (i = 0; i < cmd.wr_count; ++i) {
2038                 if (copy_from_user(user_wr, wqes + i * cmd.wqe_size,
2039                                    cmd.wqe_size)) {
2040                         ret = -EFAULT;
2041                         goto out_put;
2042                 }
2043
2044                 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
2045                         ret = -EINVAL;
2046                         goto out_put;
2047                 }
2048
2049                 if (is_ud) {
2050                         struct ib_ud_wr *ud;
2051
2052                         if (user_wr->opcode != IB_WR_SEND &&
2053                             user_wr->opcode != IB_WR_SEND_WITH_IMM) {
2054                                 ret = -EINVAL;
2055                                 goto out_put;
2056                         }
2057
2058                         next_size = sizeof(*ud);
2059                         ud = alloc_wr(next_size, user_wr->num_sge);
2060                         if (!ud) {
2061                                 ret = -ENOMEM;
2062                                 goto out_put;
2063                         }
2064
2065                         ud->ah = uobj_get_obj_read(ah, UVERBS_OBJECT_AH,
2066                                                    user_wr->wr.ud.ah, attrs);
2067                         if (!ud->ah) {
2068                                 kfree(ud);
2069                                 ret = -EINVAL;
2070                                 goto out_put;
2071                         }
2072                         ud->remote_qpn = user_wr->wr.ud.remote_qpn;
2073                         ud->remote_qkey = user_wr->wr.ud.remote_qkey;
2074
2075                         next = &ud->wr;
2076                 } else if (user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM ||
2077                            user_wr->opcode == IB_WR_RDMA_WRITE ||
2078                            user_wr->opcode == IB_WR_RDMA_READ) {
2079                         struct ib_rdma_wr *rdma;
2080
2081                         next_size = sizeof(*rdma);
2082                         rdma = alloc_wr(next_size, user_wr->num_sge);
2083                         if (!rdma) {
2084                                 ret = -ENOMEM;
2085                                 goto out_put;
2086                         }
2087
2088                         rdma->remote_addr = user_wr->wr.rdma.remote_addr;
2089                         rdma->rkey = user_wr->wr.rdma.rkey;
2090
2091                         next = &rdma->wr;
2092                 } else if (user_wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP ||
2093                            user_wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) {
2094                         struct ib_atomic_wr *atomic;
2095
2096                         next_size = sizeof(*atomic);
2097                         atomic = alloc_wr(next_size, user_wr->num_sge);
2098                         if (!atomic) {
2099                                 ret = -ENOMEM;
2100                                 goto out_put;
2101                         }
2102
2103                         atomic->remote_addr = user_wr->wr.atomic.remote_addr;
2104                         atomic->compare_add = user_wr->wr.atomic.compare_add;
2105                         atomic->swap = user_wr->wr.atomic.swap;
2106                         atomic->rkey = user_wr->wr.atomic.rkey;
2107
2108                         next = &atomic->wr;
2109                 } else if (user_wr->opcode == IB_WR_SEND ||
2110                            user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2111                            user_wr->opcode == IB_WR_SEND_WITH_INV) {
2112                         next_size = sizeof(*next);
2113                         next = alloc_wr(next_size, user_wr->num_sge);
2114                         if (!next) {
2115                                 ret = -ENOMEM;
2116                                 goto out_put;
2117                         }
2118                 } else {
2119                         ret = -EINVAL;
2120                         goto out_put;
2121                 }
2122
2123                 if (user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2124                     user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) {
2125                         next->ex.imm_data =
2126                                         (__be32 __force) user_wr->ex.imm_data;
2127                 } else if (user_wr->opcode == IB_WR_SEND_WITH_INV) {
2128                         next->ex.invalidate_rkey = user_wr->ex.invalidate_rkey;
2129                 }
2130
2131                 if (!last)
2132                         wr = next;
2133                 else
2134                         last->next = next;
2135                 last = next;
2136
2137                 next->next       = NULL;
2138                 next->wr_id      = user_wr->wr_id;
2139                 next->num_sge    = user_wr->num_sge;
2140                 next->opcode     = user_wr->opcode;
2141                 next->send_flags = user_wr->send_flags;
2142
2143                 if (next->num_sge) {
2144                         next->sg_list = (void *) next +
2145                                 ALIGN(next_size, sizeof(struct ib_sge));
2146                         if (copy_from_user(next->sg_list, sgls + sg_ind,
2147                                            next->num_sge *
2148                                                    sizeof(struct ib_sge))) {
2149                                 ret = -EFAULT;
2150                                 goto out_put;
2151                         }
2152                         sg_ind += next->num_sge;
2153                 } else
2154                         next->sg_list = NULL;
2155         }
2156
2157         resp.bad_wr = 0;
2158         ret = qp->device->ops.post_send(qp->real_qp, wr, &bad_wr);
2159         if (ret)
2160                 for (next = wr; next; next = next->next) {
2161                         ++resp.bad_wr;
2162                         if (next == bad_wr)
2163                                 break;
2164                 }
2165
2166         ret2 = uverbs_response(attrs, &resp, sizeof(resp));
2167         if (ret2)
2168                 ret = ret2;
2169
2170 out_put:
2171         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
2172                                 UVERBS_LOOKUP_READ);
2173
2174         while (wr) {
2175                 if (is_ud && ud_wr(wr)->ah)
2176                         uobj_put_obj_read(ud_wr(wr)->ah);
2177                 next = wr->next;
2178                 kfree(wr);
2179                 wr = next;
2180         }
2181
2182 out:
2183         kfree(user_wr);
2184
2185         return ret;
2186 }
2187
2188 static struct ib_recv_wr *
2189 ib_uverbs_unmarshall_recv(struct uverbs_req_iter *iter, u32 wr_count,
2190                           u32 wqe_size, u32 sge_count)
2191 {
2192         struct ib_uverbs_recv_wr *user_wr;
2193         struct ib_recv_wr        *wr = NULL, *last, *next;
2194         int                       sg_ind;
2195         int                       i;
2196         int                       ret;
2197         const struct ib_sge __user *sgls;
2198         const void __user *wqes;
2199
2200         if (wqe_size < sizeof(struct ib_uverbs_recv_wr))
2201                 return ERR_PTR(-EINVAL);
2202
2203         wqes = uverbs_request_next_ptr(iter, size_mul(wqe_size, wr_count));
2204         if (IS_ERR(wqes))
2205                 return ERR_CAST(wqes);
2206         sgls = uverbs_request_next_ptr(iter, size_mul(sge_count,
2207                                                       sizeof(struct ib_uverbs_sge)));
2208         if (IS_ERR(sgls))
2209                 return ERR_CAST(sgls);
2210         ret = uverbs_request_finish(iter);
2211         if (ret)
2212                 return ERR_PTR(ret);
2213
2214         user_wr = kmalloc(wqe_size, GFP_KERNEL);
2215         if (!user_wr)
2216                 return ERR_PTR(-ENOMEM);
2217
2218         sg_ind = 0;
2219         last = NULL;
2220         for (i = 0; i < wr_count; ++i) {
2221                 if (copy_from_user(user_wr, wqes + i * wqe_size,
2222                                    wqe_size)) {
2223                         ret = -EFAULT;
2224                         goto err;
2225                 }
2226
2227                 if (user_wr->num_sge + sg_ind > sge_count) {
2228                         ret = -EINVAL;
2229                         goto err;
2230                 }
2231
2232                 if (user_wr->num_sge >=
2233                     (U32_MAX - ALIGN(sizeof(*next), sizeof(struct ib_sge))) /
2234                             sizeof(struct ib_sge)) {
2235                         ret = -EINVAL;
2236                         goto err;
2237                 }
2238
2239                 next = kmalloc(ALIGN(sizeof(*next), sizeof(struct ib_sge)) +
2240                                        user_wr->num_sge * sizeof(struct ib_sge),
2241                                GFP_KERNEL);
2242                 if (!next) {
2243                         ret = -ENOMEM;
2244                         goto err;
2245                 }
2246
2247                 if (!last)
2248                         wr = next;
2249                 else
2250                         last->next = next;
2251                 last = next;
2252
2253                 next->next       = NULL;
2254                 next->wr_id      = user_wr->wr_id;
2255                 next->num_sge    = user_wr->num_sge;
2256
2257                 if (next->num_sge) {
2258                         next->sg_list = (void *)next +
2259                                 ALIGN(sizeof(*next), sizeof(struct ib_sge));
2260                         if (copy_from_user(next->sg_list, sgls + sg_ind,
2261                                            next->num_sge *
2262                                                    sizeof(struct ib_sge))) {
2263                                 ret = -EFAULT;
2264                                 goto err;
2265                         }
2266                         sg_ind += next->num_sge;
2267                 } else
2268                         next->sg_list = NULL;
2269         }
2270
2271         kfree(user_wr);
2272         return wr;
2273
2274 err:
2275         kfree(user_wr);
2276
2277         while (wr) {
2278                 next = wr->next;
2279                 kfree(wr);
2280                 wr = next;
2281         }
2282
2283         return ERR_PTR(ret);
2284 }
2285
2286 static int ib_uverbs_post_recv(struct uverbs_attr_bundle *attrs)
2287 {
2288         struct ib_uverbs_post_recv      cmd;
2289         struct ib_uverbs_post_recv_resp resp;
2290         struct ib_recv_wr              *wr, *next;
2291         const struct ib_recv_wr        *bad_wr;
2292         struct ib_qp                   *qp;
2293         int ret, ret2;
2294         struct uverbs_req_iter iter;
2295
2296         ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
2297         if (ret)
2298                 return ret;
2299
2300         wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size,
2301                                        cmd.sge_count);
2302         if (IS_ERR(wr))
2303                 return PTR_ERR(wr);
2304
2305         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2306         if (!qp) {
2307                 ret = -EINVAL;
2308                 goto out;
2309         }
2310
2311         resp.bad_wr = 0;
2312         ret = qp->device->ops.post_recv(qp->real_qp, wr, &bad_wr);
2313
2314         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
2315                                 UVERBS_LOOKUP_READ);
2316         if (ret) {
2317                 for (next = wr; next; next = next->next) {
2318                         ++resp.bad_wr;
2319                         if (next == bad_wr)
2320                                 break;
2321                 }
2322         }
2323
2324         ret2 = uverbs_response(attrs, &resp, sizeof(resp));
2325         if (ret2)
2326                 ret = ret2;
2327 out:
2328         while (wr) {
2329                 next = wr->next;
2330                 kfree(wr);
2331                 wr = next;
2332         }
2333
2334         return ret;
2335 }
2336
2337 static int ib_uverbs_post_srq_recv(struct uverbs_attr_bundle *attrs)
2338 {
2339         struct ib_uverbs_post_srq_recv      cmd;
2340         struct ib_uverbs_post_srq_recv_resp resp;
2341         struct ib_recv_wr                  *wr, *next;
2342         const struct ib_recv_wr            *bad_wr;
2343         struct ib_srq                      *srq;
2344         int ret, ret2;
2345         struct uverbs_req_iter iter;
2346
2347         ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
2348         if (ret)
2349                 return ret;
2350
2351         wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size,
2352                                        cmd.sge_count);
2353         if (IS_ERR(wr))
2354                 return PTR_ERR(wr);
2355
2356         srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
2357         if (!srq) {
2358                 ret = -EINVAL;
2359                 goto out;
2360         }
2361
2362         resp.bad_wr = 0;
2363         ret = srq->device->ops.post_srq_recv(srq, wr, &bad_wr);
2364
2365         rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
2366                                 UVERBS_LOOKUP_READ);
2367
2368         if (ret)
2369                 for (next = wr; next; next = next->next) {
2370                         ++resp.bad_wr;
2371                         if (next == bad_wr)
2372                                 break;
2373                 }
2374
2375         ret2 = uverbs_response(attrs, &resp, sizeof(resp));
2376         if (ret2)
2377                 ret = ret2;
2378
2379 out:
2380         while (wr) {
2381                 next = wr->next;
2382                 kfree(wr);
2383                 wr = next;
2384         }
2385
2386         return ret;
2387 }
2388
2389 static int ib_uverbs_create_ah(struct uverbs_attr_bundle *attrs)
2390 {
2391         struct ib_uverbs_create_ah       cmd;
2392         struct ib_uverbs_create_ah_resp  resp;
2393         struct ib_uobject               *uobj;
2394         struct ib_pd                    *pd;
2395         struct ib_ah                    *ah;
2396         struct rdma_ah_attr             attr = {};
2397         int ret;
2398         struct ib_device *ib_dev;
2399
2400         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2401         if (ret)
2402                 return ret;
2403
2404         uobj = uobj_alloc(UVERBS_OBJECT_AH, attrs, &ib_dev);
2405         if (IS_ERR(uobj))
2406                 return PTR_ERR(uobj);
2407
2408         if (!rdma_is_port_valid(ib_dev, cmd.attr.port_num)) {
2409                 ret = -EINVAL;
2410                 goto err;
2411         }
2412
2413         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
2414         if (!pd) {
2415                 ret = -EINVAL;
2416                 goto err;
2417         }
2418
2419         attr.type = rdma_ah_find_type(ib_dev, cmd.attr.port_num);
2420         rdma_ah_set_make_grd(&attr, false);
2421         rdma_ah_set_dlid(&attr, cmd.attr.dlid);
2422         rdma_ah_set_sl(&attr, cmd.attr.sl);
2423         rdma_ah_set_path_bits(&attr, cmd.attr.src_path_bits);
2424         rdma_ah_set_static_rate(&attr, cmd.attr.static_rate);
2425         rdma_ah_set_port_num(&attr, cmd.attr.port_num);
2426
2427         if (cmd.attr.is_global) {
2428                 rdma_ah_set_grh(&attr, NULL, cmd.attr.grh.flow_label,
2429                                 cmd.attr.grh.sgid_index,
2430                                 cmd.attr.grh.hop_limit,
2431                                 cmd.attr.grh.traffic_class);
2432                 rdma_ah_set_dgid_raw(&attr, cmd.attr.grh.dgid);
2433         } else {
2434                 rdma_ah_set_ah_flags(&attr, 0);
2435         }
2436
2437         ah = rdma_create_user_ah(pd, &attr, &attrs->driver_udata);
2438         if (IS_ERR(ah)) {
2439                 ret = PTR_ERR(ah);
2440                 goto err_put;
2441         }
2442
2443         ah->uobject  = uobj;
2444         uobj->user_handle = cmd.user_handle;
2445         uobj->object = ah;
2446         uobj_put_obj_read(pd);
2447         uobj_finalize_uobj_create(uobj, attrs);
2448
2449         resp.ah_handle = uobj->id;
2450         return uverbs_response(attrs, &resp, sizeof(resp));
2451
2452 err_put:
2453         uobj_put_obj_read(pd);
2454 err:
2455         uobj_alloc_abort(uobj, attrs);
2456         return ret;
2457 }
2458
2459 static int ib_uverbs_destroy_ah(struct uverbs_attr_bundle *attrs)
2460 {
2461         struct ib_uverbs_destroy_ah cmd;
2462         int ret;
2463
2464         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2465         if (ret)
2466                 return ret;
2467
2468         return uobj_perform_destroy(UVERBS_OBJECT_AH, cmd.ah_handle, attrs);
2469 }
2470
2471 static int ib_uverbs_attach_mcast(struct uverbs_attr_bundle *attrs)
2472 {
2473         struct ib_uverbs_attach_mcast cmd;
2474         struct ib_qp                 *qp;
2475         struct ib_uqp_object         *obj;
2476         struct ib_uverbs_mcast_entry *mcast;
2477         int                           ret;
2478
2479         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2480         if (ret)
2481                 return ret;
2482
2483         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2484         if (!qp)
2485                 return -EINVAL;
2486
2487         obj = qp->uobject;
2488
2489         mutex_lock(&obj->mcast_lock);
2490         list_for_each_entry(mcast, &obj->mcast_list, list)
2491                 if (cmd.mlid == mcast->lid &&
2492                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2493                         ret = 0;
2494                         goto out_put;
2495                 }
2496
2497         mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
2498         if (!mcast) {
2499                 ret = -ENOMEM;
2500                 goto out_put;
2501         }
2502
2503         mcast->lid = cmd.mlid;
2504         memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
2505
2506         ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
2507         if (!ret)
2508                 list_add_tail(&mcast->list, &obj->mcast_list);
2509         else
2510                 kfree(mcast);
2511
2512 out_put:
2513         mutex_unlock(&obj->mcast_lock);
2514         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
2515                                 UVERBS_LOOKUP_READ);
2516
2517         return ret;
2518 }
2519
2520 static int ib_uverbs_detach_mcast(struct uverbs_attr_bundle *attrs)
2521 {
2522         struct ib_uverbs_detach_mcast cmd;
2523         struct ib_uqp_object         *obj;
2524         struct ib_qp                 *qp;
2525         struct ib_uverbs_mcast_entry *mcast;
2526         int                           ret;
2527         bool                          found = false;
2528
2529         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2530         if (ret)
2531                 return ret;
2532
2533         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2534         if (!qp)
2535                 return -EINVAL;
2536
2537         obj = qp->uobject;
2538         mutex_lock(&obj->mcast_lock);
2539
2540         list_for_each_entry(mcast, &obj->mcast_list, list)
2541                 if (cmd.mlid == mcast->lid &&
2542                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2543                         list_del(&mcast->list);
2544                         kfree(mcast);
2545                         found = true;
2546                         break;
2547                 }
2548
2549         if (!found) {
2550                 ret = -EINVAL;
2551                 goto out_put;
2552         }
2553
2554         ret = ib_detach_mcast(qp, (union ib_gid *)cmd.gid, cmd.mlid);
2555
2556 out_put:
2557         mutex_unlock(&obj->mcast_lock);
2558         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
2559                                 UVERBS_LOOKUP_READ);
2560         return ret;
2561 }
2562
2563 struct ib_uflow_resources *flow_resources_alloc(size_t num_specs)
2564 {
2565         struct ib_uflow_resources *resources;
2566
2567         resources = kzalloc(sizeof(*resources), GFP_KERNEL);
2568
2569         if (!resources)
2570                 return NULL;
2571
2572         if (!num_specs)
2573                 goto out;
2574
2575         resources->counters =
2576                 kcalloc(num_specs, sizeof(*resources->counters), GFP_KERNEL);
2577         resources->collection =
2578                 kcalloc(num_specs, sizeof(*resources->collection), GFP_KERNEL);
2579
2580         if (!resources->counters || !resources->collection)
2581                 goto err;
2582
2583 out:
2584         resources->max = num_specs;
2585         return resources;
2586
2587 err:
2588         kfree(resources->counters);
2589         kfree(resources);
2590
2591         return NULL;
2592 }
2593 EXPORT_SYMBOL(flow_resources_alloc);
2594
2595 void ib_uverbs_flow_resources_free(struct ib_uflow_resources *uflow_res)
2596 {
2597         unsigned int i;
2598
2599         if (!uflow_res)
2600                 return;
2601
2602         for (i = 0; i < uflow_res->collection_num; i++)
2603                 atomic_dec(&uflow_res->collection[i]->usecnt);
2604
2605         for (i = 0; i < uflow_res->counters_num; i++)
2606                 atomic_dec(&uflow_res->counters[i]->usecnt);
2607
2608         kfree(uflow_res->collection);
2609         kfree(uflow_res->counters);
2610         kfree(uflow_res);
2611 }
2612 EXPORT_SYMBOL(ib_uverbs_flow_resources_free);
2613
2614 void flow_resources_add(struct ib_uflow_resources *uflow_res,
2615                         enum ib_flow_spec_type type,
2616                         void *ibobj)
2617 {
2618         WARN_ON(uflow_res->num >= uflow_res->max);
2619
2620         switch (type) {
2621         case IB_FLOW_SPEC_ACTION_HANDLE:
2622                 atomic_inc(&((struct ib_flow_action *)ibobj)->usecnt);
2623                 uflow_res->collection[uflow_res->collection_num++] =
2624                         (struct ib_flow_action *)ibobj;
2625                 break;
2626         case IB_FLOW_SPEC_ACTION_COUNT:
2627                 atomic_inc(&((struct ib_counters *)ibobj)->usecnt);
2628                 uflow_res->counters[uflow_res->counters_num++] =
2629                         (struct ib_counters *)ibobj;
2630                 break;
2631         default:
2632                 WARN_ON(1);
2633         }
2634
2635         uflow_res->num++;
2636 }
2637 EXPORT_SYMBOL(flow_resources_add);
2638
2639 static int kern_spec_to_ib_spec_action(struct uverbs_attr_bundle *attrs,
2640                                        struct ib_uverbs_flow_spec *kern_spec,
2641                                        union ib_flow_spec *ib_spec,
2642                                        struct ib_uflow_resources *uflow_res)
2643 {
2644         ib_spec->type = kern_spec->type;
2645         switch (ib_spec->type) {
2646         case IB_FLOW_SPEC_ACTION_TAG:
2647                 if (kern_spec->flow_tag.size !=
2648                     sizeof(struct ib_uverbs_flow_spec_action_tag))
2649                         return -EINVAL;
2650
2651                 ib_spec->flow_tag.size = sizeof(struct ib_flow_spec_action_tag);
2652                 ib_spec->flow_tag.tag_id = kern_spec->flow_tag.tag_id;
2653                 break;
2654         case IB_FLOW_SPEC_ACTION_DROP:
2655                 if (kern_spec->drop.size !=
2656                     sizeof(struct ib_uverbs_flow_spec_action_drop))
2657                         return -EINVAL;
2658
2659                 ib_spec->drop.size = sizeof(struct ib_flow_spec_action_drop);
2660                 break;
2661         case IB_FLOW_SPEC_ACTION_HANDLE:
2662                 if (kern_spec->action.size !=
2663                     sizeof(struct ib_uverbs_flow_spec_action_handle))
2664                         return -EOPNOTSUPP;
2665                 ib_spec->action.act = uobj_get_obj_read(flow_action,
2666                                                         UVERBS_OBJECT_FLOW_ACTION,
2667                                                         kern_spec->action.handle,
2668                                                         attrs);
2669                 if (!ib_spec->action.act)
2670                         return -EINVAL;
2671                 ib_spec->action.size =
2672                         sizeof(struct ib_flow_spec_action_handle);
2673                 flow_resources_add(uflow_res,
2674                                    IB_FLOW_SPEC_ACTION_HANDLE,
2675                                    ib_spec->action.act);
2676                 uobj_put_obj_read(ib_spec->action.act);
2677                 break;
2678         case IB_FLOW_SPEC_ACTION_COUNT:
2679                 if (kern_spec->flow_count.size !=
2680                         sizeof(struct ib_uverbs_flow_spec_action_count))
2681                         return -EINVAL;
2682                 ib_spec->flow_count.counters =
2683                         uobj_get_obj_read(counters,
2684                                           UVERBS_OBJECT_COUNTERS,
2685                                           kern_spec->flow_count.handle,
2686                                           attrs);
2687                 if (!ib_spec->flow_count.counters)
2688                         return -EINVAL;
2689                 ib_spec->flow_count.size =
2690                                 sizeof(struct ib_flow_spec_action_count);
2691                 flow_resources_add(uflow_res,
2692                                    IB_FLOW_SPEC_ACTION_COUNT,
2693                                    ib_spec->flow_count.counters);
2694                 uobj_put_obj_read(ib_spec->flow_count.counters);
2695                 break;
2696         default:
2697                 return -EINVAL;
2698         }
2699         return 0;
2700 }
2701
2702 static ssize_t spec_filter_size(const void *kern_spec_filter, u16 kern_filter_size,
2703                                 u16 ib_real_filter_sz)
2704 {
2705         /*
2706          * User space filter structures must be 64 bit aligned, otherwise this
2707          * may pass, but we won't handle additional new attributes.
2708          */
2709
2710         if (kern_filter_size > ib_real_filter_sz) {
2711                 if (memchr_inv(kern_spec_filter +
2712                                ib_real_filter_sz, 0,
2713                                kern_filter_size - ib_real_filter_sz))
2714                         return -EINVAL;
2715                 return ib_real_filter_sz;
2716         }
2717         return kern_filter_size;
2718 }
2719
2720 int ib_uverbs_kern_spec_to_ib_spec_filter(enum ib_flow_spec_type type,
2721                                           const void *kern_spec_mask,
2722                                           const void *kern_spec_val,
2723                                           size_t kern_filter_sz,
2724                                           union ib_flow_spec *ib_spec)
2725 {
2726         ssize_t actual_filter_sz;
2727         ssize_t ib_filter_sz;
2728
2729         /* User flow spec size must be aligned to 4 bytes */
2730         if (kern_filter_sz != ALIGN(kern_filter_sz, 4))
2731                 return -EINVAL;
2732
2733         ib_spec->type = type;
2734
2735         if (ib_spec->type == (IB_FLOW_SPEC_INNER | IB_FLOW_SPEC_VXLAN_TUNNEL))
2736                 return -EINVAL;
2737
2738         switch (ib_spec->type & ~IB_FLOW_SPEC_INNER) {
2739         case IB_FLOW_SPEC_ETH:
2740                 ib_filter_sz = sizeof(struct ib_flow_eth_filter);
2741                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2742                                                     kern_filter_sz,
2743                                                     ib_filter_sz);
2744                 if (actual_filter_sz <= 0)
2745                         return -EINVAL;
2746                 ib_spec->size = sizeof(struct ib_flow_spec_eth);
2747                 memcpy(&ib_spec->eth.val, kern_spec_val, actual_filter_sz);
2748                 memcpy(&ib_spec->eth.mask, kern_spec_mask, actual_filter_sz);
2749                 break;
2750         case IB_FLOW_SPEC_IPV4:
2751                 ib_filter_sz = sizeof(struct ib_flow_ipv4_filter);
2752                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2753                                                     kern_filter_sz,
2754                                                     ib_filter_sz);
2755                 if (actual_filter_sz <= 0)
2756                         return -EINVAL;
2757                 ib_spec->size = sizeof(struct ib_flow_spec_ipv4);
2758                 memcpy(&ib_spec->ipv4.val, kern_spec_val, actual_filter_sz);
2759                 memcpy(&ib_spec->ipv4.mask, kern_spec_mask, actual_filter_sz);
2760                 break;
2761         case IB_FLOW_SPEC_IPV6:
2762                 ib_filter_sz = sizeof(struct ib_flow_ipv6_filter);
2763                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2764                                                     kern_filter_sz,
2765                                                     ib_filter_sz);
2766                 if (actual_filter_sz <= 0)
2767                         return -EINVAL;
2768                 ib_spec->size = sizeof(struct ib_flow_spec_ipv6);
2769                 memcpy(&ib_spec->ipv6.val, kern_spec_val, actual_filter_sz);
2770                 memcpy(&ib_spec->ipv6.mask, kern_spec_mask, actual_filter_sz);
2771
2772                 if ((ntohl(ib_spec->ipv6.mask.flow_label)) >= BIT(20) ||
2773                     (ntohl(ib_spec->ipv6.val.flow_label)) >= BIT(20))
2774                         return -EINVAL;
2775                 break;
2776         case IB_FLOW_SPEC_TCP:
2777         case IB_FLOW_SPEC_UDP:
2778                 ib_filter_sz = sizeof(struct ib_flow_tcp_udp_filter);
2779                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2780                                                     kern_filter_sz,
2781                                                     ib_filter_sz);
2782                 if (actual_filter_sz <= 0)
2783                         return -EINVAL;
2784                 ib_spec->size = sizeof(struct ib_flow_spec_tcp_udp);
2785                 memcpy(&ib_spec->tcp_udp.val, kern_spec_val, actual_filter_sz);
2786                 memcpy(&ib_spec->tcp_udp.mask, kern_spec_mask, actual_filter_sz);
2787                 break;
2788         case IB_FLOW_SPEC_VXLAN_TUNNEL:
2789                 ib_filter_sz = sizeof(struct ib_flow_tunnel_filter);
2790                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2791                                                     kern_filter_sz,
2792                                                     ib_filter_sz);
2793                 if (actual_filter_sz <= 0)
2794                         return -EINVAL;
2795                 ib_spec->tunnel.size = sizeof(struct ib_flow_spec_tunnel);
2796                 memcpy(&ib_spec->tunnel.val, kern_spec_val, actual_filter_sz);
2797                 memcpy(&ib_spec->tunnel.mask, kern_spec_mask, actual_filter_sz);
2798
2799                 if ((ntohl(ib_spec->tunnel.mask.tunnel_id)) >= BIT(24) ||
2800                     (ntohl(ib_spec->tunnel.val.tunnel_id)) >= BIT(24))
2801                         return -EINVAL;
2802                 break;
2803         case IB_FLOW_SPEC_ESP:
2804                 ib_filter_sz = sizeof(struct ib_flow_esp_filter);
2805                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2806                                                     kern_filter_sz,
2807                                                     ib_filter_sz);
2808                 if (actual_filter_sz <= 0)
2809                         return -EINVAL;
2810                 ib_spec->esp.size = sizeof(struct ib_flow_spec_esp);
2811                 memcpy(&ib_spec->esp.val, kern_spec_val, actual_filter_sz);
2812                 memcpy(&ib_spec->esp.mask, kern_spec_mask, actual_filter_sz);
2813                 break;
2814         case IB_FLOW_SPEC_GRE:
2815                 ib_filter_sz = sizeof(struct ib_flow_gre_filter);
2816                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2817                                                     kern_filter_sz,
2818                                                     ib_filter_sz);
2819                 if (actual_filter_sz <= 0)
2820                         return -EINVAL;
2821                 ib_spec->gre.size = sizeof(struct ib_flow_spec_gre);
2822                 memcpy(&ib_spec->gre.val, kern_spec_val, actual_filter_sz);
2823                 memcpy(&ib_spec->gre.mask, kern_spec_mask, actual_filter_sz);
2824                 break;
2825         case IB_FLOW_SPEC_MPLS:
2826                 ib_filter_sz = sizeof(struct ib_flow_mpls_filter);
2827                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2828                                                     kern_filter_sz,
2829                                                     ib_filter_sz);
2830                 if (actual_filter_sz <= 0)
2831                         return -EINVAL;
2832                 ib_spec->mpls.size = sizeof(struct ib_flow_spec_mpls);
2833                 memcpy(&ib_spec->mpls.val, kern_spec_val, actual_filter_sz);
2834                 memcpy(&ib_spec->mpls.mask, kern_spec_mask, actual_filter_sz);
2835                 break;
2836         default:
2837                 return -EINVAL;
2838         }
2839         return 0;
2840 }
2841
2842 static int kern_spec_to_ib_spec_filter(struct ib_uverbs_flow_spec *kern_spec,
2843                                        union ib_flow_spec *ib_spec)
2844 {
2845         size_t kern_filter_sz;
2846         void *kern_spec_mask;
2847         void *kern_spec_val;
2848
2849         if (check_sub_overflow((size_t)kern_spec->hdr.size,
2850                                sizeof(struct ib_uverbs_flow_spec_hdr),
2851                                &kern_filter_sz))
2852                 return -EINVAL;
2853
2854         kern_filter_sz /= 2;
2855
2856         kern_spec_val = (void *)kern_spec +
2857                 sizeof(struct ib_uverbs_flow_spec_hdr);
2858         kern_spec_mask = kern_spec_val + kern_filter_sz;
2859
2860         return ib_uverbs_kern_spec_to_ib_spec_filter(kern_spec->type,
2861                                                      kern_spec_mask,
2862                                                      kern_spec_val,
2863                                                      kern_filter_sz, ib_spec);
2864 }
2865
2866 static int kern_spec_to_ib_spec(struct uverbs_attr_bundle *attrs,
2867                                 struct ib_uverbs_flow_spec *kern_spec,
2868                                 union ib_flow_spec *ib_spec,
2869                                 struct ib_uflow_resources *uflow_res)
2870 {
2871         if (kern_spec->reserved)
2872                 return -EINVAL;
2873
2874         if (kern_spec->type >= IB_FLOW_SPEC_ACTION_TAG)
2875                 return kern_spec_to_ib_spec_action(attrs, kern_spec, ib_spec,
2876                                                    uflow_res);
2877         else
2878                 return kern_spec_to_ib_spec_filter(kern_spec, ib_spec);
2879 }
2880
2881 static int ib_uverbs_ex_create_wq(struct uverbs_attr_bundle *attrs)
2882 {
2883         struct ib_uverbs_ex_create_wq cmd;
2884         struct ib_uverbs_ex_create_wq_resp resp = {};
2885         struct ib_uwq_object           *obj;
2886         int err = 0;
2887         struct ib_cq *cq;
2888         struct ib_pd *pd;
2889         struct ib_wq *wq;
2890         struct ib_wq_init_attr wq_init_attr = {};
2891         struct ib_device *ib_dev;
2892
2893         err = uverbs_request(attrs, &cmd, sizeof(cmd));
2894         if (err)
2895                 return err;
2896
2897         if (cmd.comp_mask)
2898                 return -EOPNOTSUPP;
2899
2900         obj = (struct ib_uwq_object *)uobj_alloc(UVERBS_OBJECT_WQ, attrs,
2901                                                  &ib_dev);
2902         if (IS_ERR(obj))
2903                 return PTR_ERR(obj);
2904
2905         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
2906         if (!pd) {
2907                 err = -EINVAL;
2908                 goto err_uobj;
2909         }
2910
2911         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
2912         if (!cq) {
2913                 err = -EINVAL;
2914                 goto err_put_pd;
2915         }
2916
2917         wq_init_attr.cq = cq;
2918         wq_init_attr.max_sge = cmd.max_sge;
2919         wq_init_attr.max_wr = cmd.max_wr;
2920         wq_init_attr.wq_type = cmd.wq_type;
2921         wq_init_attr.event_handler = ib_uverbs_wq_event_handler;
2922         wq_init_attr.create_flags = cmd.create_flags;
2923         INIT_LIST_HEAD(&obj->uevent.event_list);
2924         obj->uevent.uobject.user_handle = cmd.user_handle;
2925
2926         wq = pd->device->ops.create_wq(pd, &wq_init_attr, &attrs->driver_udata);
2927         if (IS_ERR(wq)) {
2928                 err = PTR_ERR(wq);
2929                 goto err_put_cq;
2930         }
2931
2932         wq->uobject = obj;
2933         obj->uevent.uobject.object = wq;
2934         wq->wq_type = wq_init_attr.wq_type;
2935         wq->cq = cq;
2936         wq->pd = pd;
2937         wq->device = pd->device;
2938         atomic_set(&wq->usecnt, 0);
2939         atomic_inc(&pd->usecnt);
2940         atomic_inc(&cq->usecnt);
2941         obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file);
2942         if (obj->uevent.event_file)
2943                 uverbs_uobject_get(&obj->uevent.event_file->uobj);
2944
2945         uobj_put_obj_read(pd);
2946         rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
2947                                 UVERBS_LOOKUP_READ);
2948         uobj_finalize_uobj_create(&obj->uevent.uobject, attrs);
2949
2950         resp.wq_handle = obj->uevent.uobject.id;
2951         resp.max_sge = wq_init_attr.max_sge;
2952         resp.max_wr = wq_init_attr.max_wr;
2953         resp.wqn = wq->wq_num;
2954         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
2955         return uverbs_response(attrs, &resp, sizeof(resp));
2956
2957 err_put_cq:
2958         rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
2959                                 UVERBS_LOOKUP_READ);
2960 err_put_pd:
2961         uobj_put_obj_read(pd);
2962 err_uobj:
2963         uobj_alloc_abort(&obj->uevent.uobject, attrs);
2964
2965         return err;
2966 }
2967
2968 static int ib_uverbs_ex_destroy_wq(struct uverbs_attr_bundle *attrs)
2969 {
2970         struct ib_uverbs_ex_destroy_wq  cmd;
2971         struct ib_uverbs_ex_destroy_wq_resp     resp = {};
2972         struct ib_uobject               *uobj;
2973         struct ib_uwq_object            *obj;
2974         int                             ret;
2975
2976         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2977         if (ret)
2978                 return ret;
2979
2980         if (cmd.comp_mask)
2981                 return -EOPNOTSUPP;
2982
2983         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
2984         uobj = uobj_get_destroy(UVERBS_OBJECT_WQ, cmd.wq_handle, attrs);
2985         if (IS_ERR(uobj))
2986                 return PTR_ERR(uobj);
2987
2988         obj = container_of(uobj, struct ib_uwq_object, uevent.uobject);
2989         resp.events_reported = obj->uevent.events_reported;
2990
2991         uobj_put_destroy(uobj);
2992
2993         return uverbs_response(attrs, &resp, sizeof(resp));
2994 }
2995
2996 static int ib_uverbs_ex_modify_wq(struct uverbs_attr_bundle *attrs)
2997 {
2998         struct ib_uverbs_ex_modify_wq cmd;
2999         struct ib_wq *wq;
3000         struct ib_wq_attr wq_attr = {};
3001         int ret;
3002
3003         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3004         if (ret)
3005                 return ret;
3006
3007         if (!cmd.attr_mask)
3008                 return -EINVAL;
3009
3010         if (cmd.attr_mask > (IB_WQ_STATE | IB_WQ_CUR_STATE | IB_WQ_FLAGS))
3011                 return -EINVAL;
3012
3013         wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ, cmd.wq_handle, attrs);
3014         if (!wq)
3015                 return -EINVAL;
3016
3017         if (cmd.attr_mask & IB_WQ_FLAGS) {
3018                 wq_attr.flags = cmd.flags;
3019                 wq_attr.flags_mask = cmd.flags_mask;
3020         }
3021
3022         if (cmd.attr_mask & IB_WQ_CUR_STATE) {
3023                 if (cmd.curr_wq_state > IB_WQS_ERR)
3024                         return -EINVAL;
3025
3026                 wq_attr.curr_wq_state = cmd.curr_wq_state;
3027         } else {
3028                 wq_attr.curr_wq_state = wq->state;
3029         }
3030
3031         if (cmd.attr_mask & IB_WQ_STATE) {
3032                 if (cmd.wq_state > IB_WQS_ERR)
3033                         return -EINVAL;
3034
3035                 wq_attr.wq_state = cmd.wq_state;
3036         } else {
3037                 wq_attr.wq_state = wq_attr.curr_wq_state;
3038         }
3039
3040         ret = wq->device->ops.modify_wq(wq, &wq_attr, cmd.attr_mask,
3041                                         &attrs->driver_udata);
3042         rdma_lookup_put_uobject(&wq->uobject->uevent.uobject,
3043                                 UVERBS_LOOKUP_READ);
3044         return ret;
3045 }
3046
3047 static int ib_uverbs_ex_create_rwq_ind_table(struct uverbs_attr_bundle *attrs)
3048 {
3049         struct ib_uverbs_ex_create_rwq_ind_table cmd;
3050         struct ib_uverbs_ex_create_rwq_ind_table_resp  resp = {};
3051         struct ib_uobject *uobj;
3052         int err;
3053         struct ib_rwq_ind_table_init_attr init_attr = {};
3054         struct ib_rwq_ind_table *rwq_ind_tbl;
3055         struct ib_wq **wqs = NULL;
3056         u32 *wqs_handles = NULL;
3057         struct ib_wq    *wq = NULL;
3058         int i, num_read_wqs;
3059         u32 num_wq_handles;
3060         struct uverbs_req_iter iter;
3061         struct ib_device *ib_dev;
3062
3063         err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
3064         if (err)
3065                 return err;
3066
3067         if (cmd.comp_mask)
3068                 return -EOPNOTSUPP;
3069
3070         if (cmd.log_ind_tbl_size > IB_USER_VERBS_MAX_LOG_IND_TBL_SIZE)
3071                 return -EINVAL;
3072
3073         num_wq_handles = 1 << cmd.log_ind_tbl_size;
3074         wqs_handles = kcalloc(num_wq_handles, sizeof(*wqs_handles),
3075                               GFP_KERNEL);
3076         if (!wqs_handles)
3077                 return -ENOMEM;
3078
3079         err = uverbs_request_next(&iter, wqs_handles,
3080                                   num_wq_handles * sizeof(__u32));
3081         if (err)
3082                 goto err_free;
3083
3084         err = uverbs_request_finish(&iter);
3085         if (err)
3086                 goto err_free;
3087
3088         wqs = kcalloc(num_wq_handles, sizeof(*wqs), GFP_KERNEL);
3089         if (!wqs) {
3090                 err = -ENOMEM;
3091                 goto  err_free;
3092         }
3093
3094         for (num_read_wqs = 0; num_read_wqs < num_wq_handles;
3095                         num_read_wqs++) {
3096                 wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ,
3097                                        wqs_handles[num_read_wqs], attrs);
3098                 if (!wq) {
3099                         err = -EINVAL;
3100                         goto put_wqs;
3101                 }
3102
3103                 wqs[num_read_wqs] = wq;
3104                 atomic_inc(&wqs[num_read_wqs]->usecnt);
3105         }
3106
3107         uobj = uobj_alloc(UVERBS_OBJECT_RWQ_IND_TBL, attrs, &ib_dev);
3108         if (IS_ERR(uobj)) {
3109                 err = PTR_ERR(uobj);
3110                 goto put_wqs;
3111         }
3112
3113         rwq_ind_tbl = rdma_zalloc_drv_obj(ib_dev, ib_rwq_ind_table);
3114         if (!rwq_ind_tbl) {
3115                 err = -ENOMEM;
3116                 goto err_uobj;
3117         }
3118
3119         init_attr.log_ind_tbl_size = cmd.log_ind_tbl_size;
3120         init_attr.ind_tbl = wqs;
3121
3122         rwq_ind_tbl->ind_tbl = wqs;
3123         rwq_ind_tbl->log_ind_tbl_size = init_attr.log_ind_tbl_size;
3124         rwq_ind_tbl->uobject = uobj;
3125         uobj->object = rwq_ind_tbl;
3126         rwq_ind_tbl->device = ib_dev;
3127         atomic_set(&rwq_ind_tbl->usecnt, 0);
3128
3129         err = ib_dev->ops.create_rwq_ind_table(rwq_ind_tbl, &init_attr,
3130                                                &attrs->driver_udata);
3131         if (err)
3132                 goto err_create;
3133
3134         for (i = 0; i < num_wq_handles; i++)
3135                 rdma_lookup_put_uobject(&wqs[i]->uobject->uevent.uobject,
3136                                         UVERBS_LOOKUP_READ);
3137         kfree(wqs_handles);
3138         uobj_finalize_uobj_create(uobj, attrs);
3139
3140         resp.ind_tbl_handle = uobj->id;
3141         resp.ind_tbl_num = rwq_ind_tbl->ind_tbl_num;
3142         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
3143         return uverbs_response(attrs, &resp, sizeof(resp));
3144
3145 err_create:
3146         kfree(rwq_ind_tbl);
3147 err_uobj:
3148         uobj_alloc_abort(uobj, attrs);
3149 put_wqs:
3150         for (i = 0; i < num_read_wqs; i++) {
3151                 rdma_lookup_put_uobject(&wqs[i]->uobject->uevent.uobject,
3152                                         UVERBS_LOOKUP_READ);
3153                 atomic_dec(&wqs[i]->usecnt);
3154         }
3155 err_free:
3156         kfree(wqs_handles);
3157         kfree(wqs);
3158         return err;
3159 }
3160
3161 static int ib_uverbs_ex_destroy_rwq_ind_table(struct uverbs_attr_bundle *attrs)
3162 {
3163         struct ib_uverbs_ex_destroy_rwq_ind_table cmd;
3164         int ret;
3165
3166         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3167         if (ret)
3168                 return ret;
3169
3170         if (cmd.comp_mask)
3171                 return -EOPNOTSUPP;
3172
3173         return uobj_perform_destroy(UVERBS_OBJECT_RWQ_IND_TBL,
3174                                     cmd.ind_tbl_handle, attrs);
3175 }
3176
3177 static int ib_uverbs_ex_create_flow(struct uverbs_attr_bundle *attrs)
3178 {
3179         struct ib_uverbs_create_flow      cmd;
3180         struct ib_uverbs_create_flow_resp resp = {};
3181         struct ib_uobject                 *uobj;
3182         struct ib_flow                    *flow_id;
3183         struct ib_uverbs_flow_attr        *kern_flow_attr;
3184         struct ib_flow_attr               *flow_attr;
3185         struct ib_qp                      *qp;
3186         struct ib_uflow_resources         *uflow_res;
3187         struct ib_uverbs_flow_spec_hdr    *kern_spec;
3188         struct uverbs_req_iter iter;
3189         int err;
3190         void *ib_spec;
3191         int i;
3192         struct ib_device *ib_dev;
3193
3194         err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
3195         if (err)
3196                 return err;
3197
3198         if (cmd.comp_mask)
3199                 return -EINVAL;
3200
3201         if (!capable(CAP_NET_RAW))
3202                 return -EPERM;
3203
3204         if (cmd.flow_attr.flags >= IB_FLOW_ATTR_FLAGS_RESERVED)
3205                 return -EINVAL;
3206
3207         if ((cmd.flow_attr.flags & IB_FLOW_ATTR_FLAGS_DONT_TRAP) &&
3208             ((cmd.flow_attr.type == IB_FLOW_ATTR_ALL_DEFAULT) ||
3209              (cmd.flow_attr.type == IB_FLOW_ATTR_MC_DEFAULT)))
3210                 return -EINVAL;
3211
3212         if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS)
3213                 return -EINVAL;
3214
3215         if (cmd.flow_attr.size >
3216             (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec)))
3217                 return -EINVAL;
3218
3219         if (cmd.flow_attr.reserved[0] ||
3220             cmd.flow_attr.reserved[1])
3221                 return -EINVAL;
3222
3223         if (cmd.flow_attr.num_of_specs) {
3224                 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size,
3225                                          GFP_KERNEL);
3226                 if (!kern_flow_attr)
3227                         return -ENOMEM;
3228
3229                 *kern_flow_attr = cmd.flow_attr;
3230                 err = uverbs_request_next(&iter, &kern_flow_attr->flow_specs,
3231                                           cmd.flow_attr.size);
3232                 if (err)
3233                         goto err_free_attr;
3234         } else {
3235                 kern_flow_attr = &cmd.flow_attr;
3236         }
3237
3238         err = uverbs_request_finish(&iter);
3239         if (err)
3240                 goto err_free_attr;
3241
3242         uobj = uobj_alloc(UVERBS_OBJECT_FLOW, attrs, &ib_dev);
3243         if (IS_ERR(uobj)) {
3244                 err = PTR_ERR(uobj);
3245                 goto err_free_attr;
3246         }
3247
3248         if (!rdma_is_port_valid(uobj->context->device, cmd.flow_attr.port)) {
3249                 err = -EINVAL;
3250                 goto err_uobj;
3251         }
3252
3253         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
3254         if (!qp) {
3255                 err = -EINVAL;
3256                 goto err_uobj;
3257         }
3258
3259         if (qp->qp_type != IB_QPT_UD && qp->qp_type != IB_QPT_RAW_PACKET) {
3260                 err = -EINVAL;
3261                 goto err_put;
3262         }
3263
3264         flow_attr = kzalloc(struct_size(flow_attr, flows,
3265                                 cmd.flow_attr.num_of_specs), GFP_KERNEL);
3266         if (!flow_attr) {
3267                 err = -ENOMEM;
3268                 goto err_put;
3269         }
3270         uflow_res = flow_resources_alloc(cmd.flow_attr.num_of_specs);
3271         if (!uflow_res) {
3272                 err = -ENOMEM;
3273                 goto err_free_flow_attr;
3274         }
3275
3276         flow_attr->type = kern_flow_attr->type;
3277         flow_attr->priority = kern_flow_attr->priority;
3278         flow_attr->num_of_specs = kern_flow_attr->num_of_specs;
3279         flow_attr->port = kern_flow_attr->port;
3280         flow_attr->flags = kern_flow_attr->flags;
3281         flow_attr->size = sizeof(*flow_attr);
3282
3283         kern_spec = kern_flow_attr->flow_specs;
3284         ib_spec = flow_attr + 1;
3285         for (i = 0; i < flow_attr->num_of_specs &&
3286                         cmd.flow_attr.size >= sizeof(*kern_spec) &&
3287                         cmd.flow_attr.size >= kern_spec->size;
3288              i++) {
3289                 err = kern_spec_to_ib_spec(
3290                                 attrs, (struct ib_uverbs_flow_spec *)kern_spec,
3291                                 ib_spec, uflow_res);
3292                 if (err)
3293                         goto err_free;
3294
3295                 flow_attr->size +=
3296                         ((union ib_flow_spec *) ib_spec)->size;
3297                 cmd.flow_attr.size -= kern_spec->size;
3298                 kern_spec = ((void *)kern_spec) + kern_spec->size;
3299                 ib_spec += ((union ib_flow_spec *) ib_spec)->size;
3300         }
3301         if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) {
3302                 pr_warn("create flow failed, flow %d: %u bytes left from uverb cmd\n",
3303                         i, cmd.flow_attr.size);
3304                 err = -EINVAL;
3305                 goto err_free;
3306         }
3307
3308         flow_id = qp->device->ops.create_flow(qp, flow_attr,
3309                                               &attrs->driver_udata);
3310
3311         if (IS_ERR(flow_id)) {
3312                 err = PTR_ERR(flow_id);
3313                 goto err_free;
3314         }
3315
3316         ib_set_flow(uobj, flow_id, qp, qp->device, uflow_res);
3317
3318         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
3319                                 UVERBS_LOOKUP_READ);
3320         kfree(flow_attr);
3321
3322         if (cmd.flow_attr.num_of_specs)
3323                 kfree(kern_flow_attr);
3324         uobj_finalize_uobj_create(uobj, attrs);
3325
3326         resp.flow_handle = uobj->id;
3327         return uverbs_response(attrs, &resp, sizeof(resp));
3328
3329 err_free:
3330         ib_uverbs_flow_resources_free(uflow_res);
3331 err_free_flow_attr:
3332         kfree(flow_attr);
3333 err_put:
3334         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
3335                                 UVERBS_LOOKUP_READ);
3336 err_uobj:
3337         uobj_alloc_abort(uobj, attrs);
3338 err_free_attr:
3339         if (cmd.flow_attr.num_of_specs)
3340                 kfree(kern_flow_attr);
3341         return err;
3342 }
3343
3344 static int ib_uverbs_ex_destroy_flow(struct uverbs_attr_bundle *attrs)
3345 {
3346         struct ib_uverbs_destroy_flow   cmd;
3347         int                             ret;
3348
3349         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3350         if (ret)
3351                 return ret;
3352
3353         if (cmd.comp_mask)
3354                 return -EINVAL;
3355
3356         return uobj_perform_destroy(UVERBS_OBJECT_FLOW, cmd.flow_handle, attrs);
3357 }
3358
3359 static int __uverbs_create_xsrq(struct uverbs_attr_bundle *attrs,
3360                                 struct ib_uverbs_create_xsrq *cmd,
3361                                 struct ib_udata *udata)
3362 {
3363         struct ib_uverbs_create_srq_resp resp = {};
3364         struct ib_usrq_object           *obj;
3365         struct ib_pd                    *pd;
3366         struct ib_srq                   *srq;
3367         struct ib_srq_init_attr          attr;
3368         int ret;
3369         struct ib_uobject *xrcd_uobj;
3370         struct ib_device *ib_dev;
3371
3372         obj = (struct ib_usrq_object *)uobj_alloc(UVERBS_OBJECT_SRQ, attrs,
3373                                                   &ib_dev);
3374         if (IS_ERR(obj))
3375                 return PTR_ERR(obj);
3376
3377         if (cmd->srq_type == IB_SRQT_TM)
3378                 attr.ext.tag_matching.max_num_tags = cmd->max_num_tags;
3379
3380         if (cmd->srq_type == IB_SRQT_XRC) {
3381                 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->xrcd_handle,
3382                                           attrs);
3383                 if (IS_ERR(xrcd_uobj)) {
3384                         ret = -EINVAL;
3385                         goto err;
3386                 }
3387
3388                 attr.ext.xrc.xrcd = (struct ib_xrcd *)xrcd_uobj->object;
3389                 if (!attr.ext.xrc.xrcd) {
3390                         ret = -EINVAL;
3391                         goto err_put_xrcd;
3392                 }
3393
3394                 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
3395                 atomic_inc(&obj->uxrcd->refcnt);
3396         }
3397
3398         if (ib_srq_has_cq(cmd->srq_type)) {
3399                 attr.ext.cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ,
3400                                                 cmd->cq_handle, attrs);
3401                 if (!attr.ext.cq) {
3402                         ret = -EINVAL;
3403                         goto err_put_xrcd;
3404                 }
3405         }
3406
3407         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle, attrs);
3408         if (!pd) {
3409                 ret = -EINVAL;
3410                 goto err_put_cq;
3411         }
3412
3413         attr.event_handler  = ib_uverbs_srq_event_handler;
3414         attr.srq_type       = cmd->srq_type;
3415         attr.attr.max_wr    = cmd->max_wr;
3416         attr.attr.max_sge   = cmd->max_sge;
3417         attr.attr.srq_limit = cmd->srq_limit;
3418
3419         INIT_LIST_HEAD(&obj->uevent.event_list);
3420         obj->uevent.uobject.user_handle = cmd->user_handle;
3421
3422         srq = ib_create_srq_user(pd, &attr, obj, udata);
3423         if (IS_ERR(srq)) {
3424                 ret = PTR_ERR(srq);
3425                 goto err_put_pd;
3426         }
3427
3428         obj->uevent.uobject.object = srq;
3429         obj->uevent.uobject.user_handle = cmd->user_handle;
3430         obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file);
3431         if (obj->uevent.event_file)
3432                 uverbs_uobject_get(&obj->uevent.event_file->uobj);
3433
3434         if (cmd->srq_type == IB_SRQT_XRC)
3435                 resp.srqn = srq->ext.xrc.srq_num;
3436
3437         if (cmd->srq_type == IB_SRQT_XRC)
3438                 uobj_put_read(xrcd_uobj);
3439
3440         if (ib_srq_has_cq(cmd->srq_type))
3441                 rdma_lookup_put_uobject(&attr.ext.cq->uobject->uevent.uobject,
3442                                         UVERBS_LOOKUP_READ);
3443
3444         uobj_put_obj_read(pd);
3445         uobj_finalize_uobj_create(&obj->uevent.uobject, attrs);
3446
3447         resp.srq_handle = obj->uevent.uobject.id;
3448         resp.max_wr = attr.attr.max_wr;
3449         resp.max_sge = attr.attr.max_sge;
3450         return uverbs_response(attrs, &resp, sizeof(resp));
3451
3452 err_put_pd:
3453         uobj_put_obj_read(pd);
3454 err_put_cq:
3455         if (ib_srq_has_cq(cmd->srq_type))
3456                 rdma_lookup_put_uobject(&attr.ext.cq->uobject->uevent.uobject,
3457                                         UVERBS_LOOKUP_READ);
3458
3459 err_put_xrcd:
3460         if (cmd->srq_type == IB_SRQT_XRC) {
3461                 atomic_dec(&obj->uxrcd->refcnt);
3462                 uobj_put_read(xrcd_uobj);
3463         }
3464
3465 err:
3466         uobj_alloc_abort(&obj->uevent.uobject, attrs);
3467         return ret;
3468 }
3469
3470 static int ib_uverbs_create_srq(struct uverbs_attr_bundle *attrs)
3471 {
3472         struct ib_uverbs_create_srq      cmd;
3473         struct ib_uverbs_create_xsrq     xcmd;
3474         int ret;
3475
3476         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3477         if (ret)
3478                 return ret;
3479
3480         memset(&xcmd, 0, sizeof(xcmd));
3481         xcmd.response    = cmd.response;
3482         xcmd.user_handle = cmd.user_handle;
3483         xcmd.srq_type    = IB_SRQT_BASIC;
3484         xcmd.pd_handle   = cmd.pd_handle;
3485         xcmd.max_wr      = cmd.max_wr;
3486         xcmd.max_sge     = cmd.max_sge;
3487         xcmd.srq_limit   = cmd.srq_limit;
3488
3489         return __uverbs_create_xsrq(attrs, &xcmd, &attrs->driver_udata);
3490 }
3491
3492 static int ib_uverbs_create_xsrq(struct uverbs_attr_bundle *attrs)
3493 {
3494         struct ib_uverbs_create_xsrq     cmd;
3495         int ret;
3496
3497         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3498         if (ret)
3499                 return ret;
3500
3501         return __uverbs_create_xsrq(attrs, &cmd, &attrs->driver_udata);
3502 }
3503
3504 static int ib_uverbs_modify_srq(struct uverbs_attr_bundle *attrs)
3505 {
3506         struct ib_uverbs_modify_srq cmd;
3507         struct ib_srq              *srq;
3508         struct ib_srq_attr          attr;
3509         int                         ret;
3510
3511         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3512         if (ret)
3513                 return ret;
3514
3515         srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
3516         if (!srq)
3517                 return -EINVAL;
3518
3519         attr.max_wr    = cmd.max_wr;
3520         attr.srq_limit = cmd.srq_limit;
3521
3522         ret = srq->device->ops.modify_srq(srq, &attr, cmd.attr_mask,
3523                                           &attrs->driver_udata);
3524
3525         rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
3526                                 UVERBS_LOOKUP_READ);
3527
3528         return ret;
3529 }
3530
3531 static int ib_uverbs_query_srq(struct uverbs_attr_bundle *attrs)
3532 {
3533         struct ib_uverbs_query_srq      cmd;
3534         struct ib_uverbs_query_srq_resp resp;
3535         struct ib_srq_attr              attr;
3536         struct ib_srq                   *srq;
3537         int                             ret;
3538
3539         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3540         if (ret)
3541                 return ret;
3542
3543         srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
3544         if (!srq)
3545                 return -EINVAL;
3546
3547         ret = ib_query_srq(srq, &attr);
3548
3549         rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
3550                                 UVERBS_LOOKUP_READ);
3551
3552         if (ret)
3553                 return ret;
3554
3555         memset(&resp, 0, sizeof resp);
3556
3557         resp.max_wr    = attr.max_wr;
3558         resp.max_sge   = attr.max_sge;
3559         resp.srq_limit = attr.srq_limit;
3560
3561         return uverbs_response(attrs, &resp, sizeof(resp));
3562 }
3563
3564 static int ib_uverbs_destroy_srq(struct uverbs_attr_bundle *attrs)
3565 {
3566         struct ib_uverbs_destroy_srq      cmd;
3567         struct ib_uverbs_destroy_srq_resp resp;
3568         struct ib_uobject                *uobj;
3569         struct ib_uevent_object          *obj;
3570         int ret;
3571
3572         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3573         if (ret)
3574                 return ret;
3575
3576         uobj = uobj_get_destroy(UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
3577         if (IS_ERR(uobj))
3578                 return PTR_ERR(uobj);
3579
3580         obj = container_of(uobj, struct ib_uevent_object, uobject);
3581         memset(&resp, 0, sizeof(resp));
3582         resp.events_reported = obj->events_reported;
3583
3584         uobj_put_destroy(uobj);
3585
3586         return uverbs_response(attrs, &resp, sizeof(resp));
3587 }
3588
3589 static int ib_uverbs_ex_query_device(struct uverbs_attr_bundle *attrs)
3590 {
3591         struct ib_uverbs_ex_query_device_resp resp = {};
3592         struct ib_uverbs_ex_query_device  cmd;
3593         struct ib_device_attr attr = {0};
3594         struct ib_ucontext *ucontext;
3595         struct ib_device *ib_dev;
3596         int err;
3597
3598         ucontext = ib_uverbs_get_ucontext(attrs);
3599         if (IS_ERR(ucontext))
3600                 return PTR_ERR(ucontext);
3601         ib_dev = ucontext->device;
3602
3603         err = uverbs_request(attrs, &cmd, sizeof(cmd));
3604         if (err)
3605                 return err;
3606
3607         if (cmd.comp_mask)
3608                 return -EINVAL;
3609
3610         if (cmd.reserved)
3611                 return -EINVAL;
3612
3613         err = ib_dev->ops.query_device(ib_dev, &attr, &attrs->driver_udata);
3614         if (err)
3615                 return err;
3616
3617         copy_query_dev_fields(ucontext, &resp.base, &attr);
3618
3619         resp.odp_caps.general_caps = attr.odp_caps.general_caps;
3620         resp.odp_caps.per_transport_caps.rc_odp_caps =
3621                 attr.odp_caps.per_transport_caps.rc_odp_caps;
3622         resp.odp_caps.per_transport_caps.uc_odp_caps =
3623                 attr.odp_caps.per_transport_caps.uc_odp_caps;
3624         resp.odp_caps.per_transport_caps.ud_odp_caps =
3625                 attr.odp_caps.per_transport_caps.ud_odp_caps;
3626         resp.xrc_odp_caps = attr.odp_caps.per_transport_caps.xrc_odp_caps;
3627
3628         resp.timestamp_mask = attr.timestamp_mask;
3629         resp.hca_core_clock = attr.hca_core_clock;
3630         resp.device_cap_flags_ex = attr.device_cap_flags;
3631         resp.rss_caps.supported_qpts = attr.rss_caps.supported_qpts;
3632         resp.rss_caps.max_rwq_indirection_tables =
3633                 attr.rss_caps.max_rwq_indirection_tables;
3634         resp.rss_caps.max_rwq_indirection_table_size =
3635                 attr.rss_caps.max_rwq_indirection_table_size;
3636         resp.max_wq_type_rq = attr.max_wq_type_rq;
3637         resp.raw_packet_caps = attr.raw_packet_caps;
3638         resp.tm_caps.max_rndv_hdr_size  = attr.tm_caps.max_rndv_hdr_size;
3639         resp.tm_caps.max_num_tags       = attr.tm_caps.max_num_tags;
3640         resp.tm_caps.max_ops            = attr.tm_caps.max_ops;
3641         resp.tm_caps.max_sge            = attr.tm_caps.max_sge;
3642         resp.tm_caps.flags              = attr.tm_caps.flags;
3643         resp.cq_moderation_caps.max_cq_moderation_count  =
3644                 attr.cq_caps.max_cq_moderation_count;
3645         resp.cq_moderation_caps.max_cq_moderation_period =
3646                 attr.cq_caps.max_cq_moderation_period;
3647         resp.max_dm_size = attr.max_dm_size;
3648         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
3649
3650         return uverbs_response(attrs, &resp, sizeof(resp));
3651 }
3652
3653 static int ib_uverbs_ex_modify_cq(struct uverbs_attr_bundle *attrs)
3654 {
3655         struct ib_uverbs_ex_modify_cq cmd;
3656         struct ib_cq *cq;
3657         int ret;
3658
3659         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3660         if (ret)
3661                 return ret;
3662
3663         if (!cmd.attr_mask || cmd.reserved)
3664                 return -EINVAL;
3665
3666         if (cmd.attr_mask > IB_CQ_MODERATE)
3667                 return -EOPNOTSUPP;
3668
3669         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
3670         if (!cq)
3671                 return -EINVAL;
3672
3673         ret = rdma_set_cq_moderation(cq, cmd.attr.cq_count, cmd.attr.cq_period);
3674
3675         rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
3676                                 UVERBS_LOOKUP_READ);
3677         return ret;
3678 }
3679
3680 /*
3681  * Describe the input structs for write(). Some write methods have an input
3682  * only struct, most have an input and output. If the struct has an output then
3683  * the 'response' u64 must be the first field in the request structure.
3684  *
3685  * If udata is present then both the request and response structs have a
3686  * trailing driver_data flex array. In this case the size of the base struct
3687  * cannot be changed.
3688  */
3689 #define UAPI_DEF_WRITE_IO(req, resp)                                           \
3690         .write.has_resp = 1 +                                                  \
3691                           BUILD_BUG_ON_ZERO(offsetof(req, response) != 0) +    \
3692                           BUILD_BUG_ON_ZERO(sizeof_field(req, response) !=    \
3693                                             sizeof(u64)),                      \
3694         .write.req_size = sizeof(req), .write.resp_size = sizeof(resp)
3695
3696 #define UAPI_DEF_WRITE_I(req) .write.req_size = sizeof(req)
3697
3698 #define UAPI_DEF_WRITE_UDATA_IO(req, resp)                                     \
3699         UAPI_DEF_WRITE_IO(req, resp),                                          \
3700                 .write.has_udata =                                             \
3701                         1 +                                                    \
3702                         BUILD_BUG_ON_ZERO(offsetof(req, driver_data) !=        \
3703                                           sizeof(req)) +                       \
3704                         BUILD_BUG_ON_ZERO(offsetof(resp, driver_data) !=       \
3705                                           sizeof(resp))
3706
3707 #define UAPI_DEF_WRITE_UDATA_I(req)                                            \
3708         UAPI_DEF_WRITE_I(req),                                                 \
3709                 .write.has_udata =                                             \
3710                         1 + BUILD_BUG_ON_ZERO(offsetof(req, driver_data) !=    \
3711                                               sizeof(req))
3712
3713 /*
3714  * The _EX versions are for use with WRITE_EX and allow the last struct member
3715  * to be specified. Buffers that do not include that member will be rejected.
3716  */
3717 #define UAPI_DEF_WRITE_IO_EX(req, req_last_member, resp, resp_last_member)     \
3718         .write.has_resp = 1,                                                   \
3719         .write.req_size = offsetofend(req, req_last_member),                   \
3720         .write.resp_size = offsetofend(resp, resp_last_member)
3721
3722 #define UAPI_DEF_WRITE_I_EX(req, req_last_member)                              \
3723         .write.req_size = offsetofend(req, req_last_member)
3724
3725 const struct uapi_definition uverbs_def_write_intf[] = {
3726         DECLARE_UVERBS_OBJECT(
3727                 UVERBS_OBJECT_AH,
3728                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_AH,
3729                                      ib_uverbs_create_ah,
3730                                      UAPI_DEF_WRITE_UDATA_IO(
3731                                              struct ib_uverbs_create_ah,
3732                                              struct ib_uverbs_create_ah_resp)),
3733                 DECLARE_UVERBS_WRITE(
3734                         IB_USER_VERBS_CMD_DESTROY_AH,
3735                         ib_uverbs_destroy_ah,
3736                         UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_ah)),
3737                 UAPI_DEF_OBJ_NEEDS_FN(create_user_ah),
3738                 UAPI_DEF_OBJ_NEEDS_FN(destroy_ah)),
3739
3740         DECLARE_UVERBS_OBJECT(
3741                 UVERBS_OBJECT_COMP_CHANNEL,
3742                 DECLARE_UVERBS_WRITE(
3743                         IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL,
3744                         ib_uverbs_create_comp_channel,
3745                         UAPI_DEF_WRITE_IO(
3746                                 struct ib_uverbs_create_comp_channel,
3747                                 struct ib_uverbs_create_comp_channel_resp))),
3748
3749         DECLARE_UVERBS_OBJECT(
3750                 UVERBS_OBJECT_CQ,
3751                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_CQ,
3752                                      ib_uverbs_create_cq,
3753                                      UAPI_DEF_WRITE_UDATA_IO(
3754                                              struct ib_uverbs_create_cq,
3755                                              struct ib_uverbs_create_cq_resp),
3756                                      UAPI_DEF_METHOD_NEEDS_FN(create_cq)),
3757                 DECLARE_UVERBS_WRITE(
3758                         IB_USER_VERBS_CMD_DESTROY_CQ,
3759                         ib_uverbs_destroy_cq,
3760                         UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_cq,
3761                                           struct ib_uverbs_destroy_cq_resp),
3762                         UAPI_DEF_METHOD_NEEDS_FN(destroy_cq)),
3763                 DECLARE_UVERBS_WRITE(
3764                         IB_USER_VERBS_CMD_POLL_CQ,
3765                         ib_uverbs_poll_cq,
3766                         UAPI_DEF_WRITE_IO(struct ib_uverbs_poll_cq,
3767                                           struct ib_uverbs_poll_cq_resp),
3768                         UAPI_DEF_METHOD_NEEDS_FN(poll_cq)),
3769                 DECLARE_UVERBS_WRITE(
3770                         IB_USER_VERBS_CMD_REQ_NOTIFY_CQ,
3771                         ib_uverbs_req_notify_cq,
3772                         UAPI_DEF_WRITE_I(struct ib_uverbs_req_notify_cq),
3773                         UAPI_DEF_METHOD_NEEDS_FN(req_notify_cq)),
3774                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_RESIZE_CQ,
3775                                      ib_uverbs_resize_cq,
3776                                      UAPI_DEF_WRITE_UDATA_IO(
3777                                              struct ib_uverbs_resize_cq,
3778                                              struct ib_uverbs_resize_cq_resp),
3779                                      UAPI_DEF_METHOD_NEEDS_FN(resize_cq)),
3780                 DECLARE_UVERBS_WRITE_EX(
3781                         IB_USER_VERBS_EX_CMD_CREATE_CQ,
3782                         ib_uverbs_ex_create_cq,
3783                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_cq,
3784                                              reserved,
3785                                              struct ib_uverbs_ex_create_cq_resp,
3786                                              response_length),
3787                         UAPI_DEF_METHOD_NEEDS_FN(create_cq)),
3788                 DECLARE_UVERBS_WRITE_EX(
3789                         IB_USER_VERBS_EX_CMD_MODIFY_CQ,
3790                         ib_uverbs_ex_modify_cq,
3791                         UAPI_DEF_WRITE_I(struct ib_uverbs_ex_modify_cq),
3792                         UAPI_DEF_METHOD_NEEDS_FN(modify_cq))),
3793
3794         DECLARE_UVERBS_OBJECT(
3795                 UVERBS_OBJECT_DEVICE,
3796                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_GET_CONTEXT,
3797                                      ib_uverbs_get_context,
3798                                      UAPI_DEF_WRITE_UDATA_IO(
3799                                              struct ib_uverbs_get_context,
3800                                              struct ib_uverbs_get_context_resp)),
3801                 DECLARE_UVERBS_WRITE(
3802                         IB_USER_VERBS_CMD_QUERY_DEVICE,
3803                         ib_uverbs_query_device,
3804                         UAPI_DEF_WRITE_IO(struct ib_uverbs_query_device,
3805                                           struct ib_uverbs_query_device_resp)),
3806                 DECLARE_UVERBS_WRITE(
3807                         IB_USER_VERBS_CMD_QUERY_PORT,
3808                         ib_uverbs_query_port,
3809                         UAPI_DEF_WRITE_IO(struct ib_uverbs_query_port,
3810                                           struct ib_uverbs_query_port_resp),
3811                         UAPI_DEF_METHOD_NEEDS_FN(query_port)),
3812                 DECLARE_UVERBS_WRITE_EX(
3813                         IB_USER_VERBS_EX_CMD_QUERY_DEVICE,
3814                         ib_uverbs_ex_query_device,
3815                         UAPI_DEF_WRITE_IO_EX(
3816                                 struct ib_uverbs_ex_query_device,
3817                                 reserved,
3818                                 struct ib_uverbs_ex_query_device_resp,
3819                                 response_length),
3820                         UAPI_DEF_METHOD_NEEDS_FN(query_device)),
3821                 UAPI_DEF_OBJ_NEEDS_FN(alloc_ucontext),
3822                 UAPI_DEF_OBJ_NEEDS_FN(dealloc_ucontext)),
3823
3824         DECLARE_UVERBS_OBJECT(
3825                 UVERBS_OBJECT_FLOW,
3826                 DECLARE_UVERBS_WRITE_EX(
3827                         IB_USER_VERBS_EX_CMD_CREATE_FLOW,
3828                         ib_uverbs_ex_create_flow,
3829                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_create_flow,
3830                                              flow_attr,
3831                                              struct ib_uverbs_create_flow_resp,
3832                                              flow_handle),
3833                         UAPI_DEF_METHOD_NEEDS_FN(create_flow)),
3834                 DECLARE_UVERBS_WRITE_EX(
3835                         IB_USER_VERBS_EX_CMD_DESTROY_FLOW,
3836                         ib_uverbs_ex_destroy_flow,
3837                         UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_flow),
3838                         UAPI_DEF_METHOD_NEEDS_FN(destroy_flow))),
3839
3840         DECLARE_UVERBS_OBJECT(
3841                 UVERBS_OBJECT_MR,
3842                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_DEREG_MR,
3843                                      ib_uverbs_dereg_mr,
3844                                      UAPI_DEF_WRITE_I(struct ib_uverbs_dereg_mr),
3845                                      UAPI_DEF_METHOD_NEEDS_FN(dereg_mr)),
3846                 DECLARE_UVERBS_WRITE(
3847                         IB_USER_VERBS_CMD_REG_MR,
3848                         ib_uverbs_reg_mr,
3849                         UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_reg_mr,
3850                                                 struct ib_uverbs_reg_mr_resp),
3851                         UAPI_DEF_METHOD_NEEDS_FN(reg_user_mr)),
3852                 DECLARE_UVERBS_WRITE(
3853                         IB_USER_VERBS_CMD_REREG_MR,
3854                         ib_uverbs_rereg_mr,
3855                         UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_rereg_mr,
3856                                                 struct ib_uverbs_rereg_mr_resp),
3857                         UAPI_DEF_METHOD_NEEDS_FN(rereg_user_mr))),
3858
3859         DECLARE_UVERBS_OBJECT(
3860                 UVERBS_OBJECT_MW,
3861                 DECLARE_UVERBS_WRITE(
3862                         IB_USER_VERBS_CMD_ALLOC_MW,
3863                         ib_uverbs_alloc_mw,
3864                         UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_mw,
3865                                                 struct ib_uverbs_alloc_mw_resp),
3866                         UAPI_DEF_METHOD_NEEDS_FN(alloc_mw)),
3867                 DECLARE_UVERBS_WRITE(
3868                         IB_USER_VERBS_CMD_DEALLOC_MW,
3869                         ib_uverbs_dealloc_mw,
3870                         UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_mw),
3871                         UAPI_DEF_METHOD_NEEDS_FN(dealloc_mw))),
3872
3873         DECLARE_UVERBS_OBJECT(
3874                 UVERBS_OBJECT_PD,
3875                 DECLARE_UVERBS_WRITE(
3876                         IB_USER_VERBS_CMD_ALLOC_PD,
3877                         ib_uverbs_alloc_pd,
3878                         UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_pd,
3879                                                 struct ib_uverbs_alloc_pd_resp),
3880                         UAPI_DEF_METHOD_NEEDS_FN(alloc_pd)),
3881                 DECLARE_UVERBS_WRITE(
3882                         IB_USER_VERBS_CMD_DEALLOC_PD,
3883                         ib_uverbs_dealloc_pd,
3884                         UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_pd),
3885                         UAPI_DEF_METHOD_NEEDS_FN(dealloc_pd))),
3886
3887         DECLARE_UVERBS_OBJECT(
3888                 UVERBS_OBJECT_QP,
3889                 DECLARE_UVERBS_WRITE(
3890                         IB_USER_VERBS_CMD_ATTACH_MCAST,
3891                         ib_uverbs_attach_mcast,
3892                         UAPI_DEF_WRITE_I(struct ib_uverbs_attach_mcast),
3893                         UAPI_DEF_METHOD_NEEDS_FN(attach_mcast),
3894                         UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)),
3895                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_QP,
3896                                      ib_uverbs_create_qp,
3897                                      UAPI_DEF_WRITE_UDATA_IO(
3898                                              struct ib_uverbs_create_qp,
3899                                              struct ib_uverbs_create_qp_resp),
3900                                      UAPI_DEF_METHOD_NEEDS_FN(create_qp)),
3901                 DECLARE_UVERBS_WRITE(
3902                         IB_USER_VERBS_CMD_DESTROY_QP,
3903                         ib_uverbs_destroy_qp,
3904                         UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_qp,
3905                                           struct ib_uverbs_destroy_qp_resp),
3906                         UAPI_DEF_METHOD_NEEDS_FN(destroy_qp)),
3907                 DECLARE_UVERBS_WRITE(
3908                         IB_USER_VERBS_CMD_DETACH_MCAST,
3909                         ib_uverbs_detach_mcast,
3910                         UAPI_DEF_WRITE_I(struct ib_uverbs_detach_mcast),
3911                         UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)),
3912                 DECLARE_UVERBS_WRITE(
3913                         IB_USER_VERBS_CMD_MODIFY_QP,
3914                         ib_uverbs_modify_qp,
3915                         UAPI_DEF_WRITE_I(struct ib_uverbs_modify_qp),
3916                         UAPI_DEF_METHOD_NEEDS_FN(modify_qp)),
3917                 DECLARE_UVERBS_WRITE(
3918                         IB_USER_VERBS_CMD_POST_RECV,
3919                         ib_uverbs_post_recv,
3920                         UAPI_DEF_WRITE_IO(struct ib_uverbs_post_recv,
3921                                           struct ib_uverbs_post_recv_resp),
3922                         UAPI_DEF_METHOD_NEEDS_FN(post_recv)),
3923                 DECLARE_UVERBS_WRITE(
3924                         IB_USER_VERBS_CMD_POST_SEND,
3925                         ib_uverbs_post_send,
3926                         UAPI_DEF_WRITE_IO(struct ib_uverbs_post_send,
3927                                           struct ib_uverbs_post_send_resp),
3928                         UAPI_DEF_METHOD_NEEDS_FN(post_send)),
3929                 DECLARE_UVERBS_WRITE(
3930                         IB_USER_VERBS_CMD_QUERY_QP,
3931                         ib_uverbs_query_qp,
3932                         UAPI_DEF_WRITE_IO(struct ib_uverbs_query_qp,
3933                                           struct ib_uverbs_query_qp_resp),
3934                         UAPI_DEF_METHOD_NEEDS_FN(query_qp)),
3935                 DECLARE_UVERBS_WRITE_EX(
3936                         IB_USER_VERBS_EX_CMD_CREATE_QP,
3937                         ib_uverbs_ex_create_qp,
3938                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_qp,
3939                                              comp_mask,
3940                                              struct ib_uverbs_ex_create_qp_resp,
3941                                              response_length),
3942                         UAPI_DEF_METHOD_NEEDS_FN(create_qp)),
3943                 DECLARE_UVERBS_WRITE_EX(
3944                         IB_USER_VERBS_EX_CMD_MODIFY_QP,
3945                         ib_uverbs_ex_modify_qp,
3946                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_modify_qp,
3947                                              base,
3948                                              struct ib_uverbs_ex_modify_qp_resp,
3949                                              response_length),
3950                         UAPI_DEF_METHOD_NEEDS_FN(modify_qp))),
3951
3952         DECLARE_UVERBS_OBJECT(
3953                 UVERBS_OBJECT_RWQ_IND_TBL,
3954                 DECLARE_UVERBS_WRITE_EX(
3955                         IB_USER_VERBS_EX_CMD_CREATE_RWQ_IND_TBL,
3956                         ib_uverbs_ex_create_rwq_ind_table,
3957                         UAPI_DEF_WRITE_IO_EX(
3958                                 struct ib_uverbs_ex_create_rwq_ind_table,
3959                                 log_ind_tbl_size,
3960                                 struct ib_uverbs_ex_create_rwq_ind_table_resp,
3961                                 ind_tbl_num),
3962                         UAPI_DEF_METHOD_NEEDS_FN(create_rwq_ind_table)),
3963                 DECLARE_UVERBS_WRITE_EX(
3964                         IB_USER_VERBS_EX_CMD_DESTROY_RWQ_IND_TBL,
3965                         ib_uverbs_ex_destroy_rwq_ind_table,
3966                         UAPI_DEF_WRITE_I(
3967                                 struct ib_uverbs_ex_destroy_rwq_ind_table),
3968                         UAPI_DEF_METHOD_NEEDS_FN(destroy_rwq_ind_table))),
3969
3970         DECLARE_UVERBS_OBJECT(
3971                 UVERBS_OBJECT_WQ,
3972                 DECLARE_UVERBS_WRITE_EX(
3973                         IB_USER_VERBS_EX_CMD_CREATE_WQ,
3974                         ib_uverbs_ex_create_wq,
3975                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_wq,
3976                                              max_sge,
3977                                              struct ib_uverbs_ex_create_wq_resp,
3978                                              wqn),
3979                         UAPI_DEF_METHOD_NEEDS_FN(create_wq)),
3980                 DECLARE_UVERBS_WRITE_EX(
3981                         IB_USER_VERBS_EX_CMD_DESTROY_WQ,
3982                         ib_uverbs_ex_destroy_wq,
3983                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_destroy_wq,
3984                                              wq_handle,
3985                                              struct ib_uverbs_ex_destroy_wq_resp,
3986                                              reserved),
3987                         UAPI_DEF_METHOD_NEEDS_FN(destroy_wq)),
3988                 DECLARE_UVERBS_WRITE_EX(
3989                         IB_USER_VERBS_EX_CMD_MODIFY_WQ,
3990                         ib_uverbs_ex_modify_wq,
3991                         UAPI_DEF_WRITE_I_EX(struct ib_uverbs_ex_modify_wq,
3992                                             curr_wq_state),
3993                         UAPI_DEF_METHOD_NEEDS_FN(modify_wq))),
3994
3995         DECLARE_UVERBS_OBJECT(
3996                 UVERBS_OBJECT_SRQ,
3997                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_SRQ,
3998                                      ib_uverbs_create_srq,
3999                                      UAPI_DEF_WRITE_UDATA_IO(
4000                                              struct ib_uverbs_create_srq,
4001                                              struct ib_uverbs_create_srq_resp),
4002                                      UAPI_DEF_METHOD_NEEDS_FN(create_srq)),
4003                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_XSRQ,
4004                                      ib_uverbs_create_xsrq,
4005                                      UAPI_DEF_WRITE_UDATA_IO(
4006                                              struct ib_uverbs_create_xsrq,
4007                                              struct ib_uverbs_create_srq_resp),
4008                                      UAPI_DEF_METHOD_NEEDS_FN(create_srq)),
4009                 DECLARE_UVERBS_WRITE(
4010                         IB_USER_VERBS_CMD_DESTROY_SRQ,
4011                         ib_uverbs_destroy_srq,
4012                         UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_srq,
4013                                           struct ib_uverbs_destroy_srq_resp),
4014                         UAPI_DEF_METHOD_NEEDS_FN(destroy_srq)),
4015                 DECLARE_UVERBS_WRITE(
4016                         IB_USER_VERBS_CMD_MODIFY_SRQ,
4017                         ib_uverbs_modify_srq,
4018                         UAPI_DEF_WRITE_UDATA_I(struct ib_uverbs_modify_srq),
4019                         UAPI_DEF_METHOD_NEEDS_FN(modify_srq)),
4020                 DECLARE_UVERBS_WRITE(
4021                         IB_USER_VERBS_CMD_POST_SRQ_RECV,
4022                         ib_uverbs_post_srq_recv,
4023                         UAPI_DEF_WRITE_IO(struct ib_uverbs_post_srq_recv,
4024                                           struct ib_uverbs_post_srq_recv_resp),
4025                         UAPI_DEF_METHOD_NEEDS_FN(post_srq_recv)),
4026                 DECLARE_UVERBS_WRITE(
4027                         IB_USER_VERBS_CMD_QUERY_SRQ,
4028                         ib_uverbs_query_srq,
4029                         UAPI_DEF_WRITE_IO(struct ib_uverbs_query_srq,
4030                                           struct ib_uverbs_query_srq_resp),
4031                         UAPI_DEF_METHOD_NEEDS_FN(query_srq))),
4032
4033         DECLARE_UVERBS_OBJECT(
4034                 UVERBS_OBJECT_XRCD,
4035                 DECLARE_UVERBS_WRITE(
4036                         IB_USER_VERBS_CMD_CLOSE_XRCD,
4037                         ib_uverbs_close_xrcd,
4038                         UAPI_DEF_WRITE_I(struct ib_uverbs_close_xrcd)),
4039                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_QP,
4040                                      ib_uverbs_open_qp,
4041                                      UAPI_DEF_WRITE_UDATA_IO(
4042                                              struct ib_uverbs_open_qp,
4043                                              struct ib_uverbs_create_qp_resp)),
4044                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_XRCD,
4045                                      ib_uverbs_open_xrcd,
4046                                      UAPI_DEF_WRITE_UDATA_IO(
4047                                              struct ib_uverbs_open_xrcd,
4048                                              struct ib_uverbs_open_xrcd_resp)),
4049                 UAPI_DEF_OBJ_NEEDS_FN(alloc_xrcd),
4050                 UAPI_DEF_OBJ_NEEDS_FN(dealloc_xrcd)),
4051
4052         {},
4053 };